netdev - Re: [PATCHv2] tun: export underlying socket

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Message-ID: <20091103151030.GB8609@gondor.apana.org.au>
Date:	Tue, 3 Nov 2009 10:10:30 -0500
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	David Miller <davem@...emloft.net>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Paul Moore <paul.moore@...com>, netdev@...r.kernel.org
Subject: Re: [PATCHv2] tun: export underlying socket

On Mon, Nov 02, 2009 at 07:20:22PM +0200, Michael S. Tsirkin wrote:
> Tun device looks similar to a packet socket
> in that both pass complete frames from/to userspace.
> 
> This patch fills in enough fields in the socket underlying tun driver
> to support sendmsg/recvmsg operations, and message flags
> MSG_TRUNC and MSG_DONTWAIT, and exports access to this socket
> to modules.  Regular read/write behaviour is unchanged.
> 
> This way, code using raw sockets to inject packets
> into a physical device, can support injecting
> packets into host network stack almost without modification.
> 
> First user of this interface will be vhost virtualization
> accelerator.
> 
> Signed-off-by: Michael S. Tsirkin <mst@...hat.com>

Acked-by: Herbert Xu <herbert@...dor.apana.org.au>
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