Re: [RFC PATCH net-next] tun: support retrieving multiple packets in a single read with IFF_MULTI_READ

Herbert Xu
2014-12-22T22:34:47Z

On Mon, Dec 22, 2014 at 12:18:39PM -0800, Alex Gartrell wrote:
>
> While fully aware that this makes me look like an idiot, I have to
> admit that I've tried and failed to figure out how to get a socket
> fd out of the tun device.

Well right now the socket is only used within the kernel by
vhost so it's not exported to user-space. If we were to use
recvmmsg obviously we'd create a new interface based on sockets
for tun and expose the existing socket through that.

The current file-based tun interface was never designed to be
a high-performance interface. So let's take this opportunity
and create a new interface (but still using the same underlying
code since whatever you create should be easily applicable to
the existing kernel user vhost).

Cheers,
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
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