netdev - Re: [PATCH net-next 2/4] udp: Handle large UFO packets from untrusted sources

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Message-Id: <200906101310.41094.rusty@rustcorp.com.au>
Date:	Wed, 10 Jun 2009 13:10:40 +0930
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Sridhar Samudrala <sri@...ibm.com>, davem@...emloft.net,
	netdev@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [PATCH net-next 2/4] udp: Handle large UFO packets from untrusted sources

On Mon, 8 Jun 2009 02:46:08 pm Herbert Xu wrote:
> On Fri, Jun 05, 2009 at 05:16:31PM -0700, Sridhar Samudrala wrote:
> > +	/* Software UFO is not yet supported */
> > +	segs = ERR_PTR(-EPROTONOSUPPORT);
>
> Hmm, we need to fill this in before you start using it for virt.
> After all, it's very difficult for the guest to know whether the
> output device on the host is going to be able to do UFO or not.

Yep, no point telling the guest we support UFO if we don't!

Cheers,
Rusty.
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