netdev - Re: virtio_net: Set correct gso->hdr

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Message-ID: <20090605042709.GA6702@gondor.apana.org.au>
Date:	Fri, 5 Jun 2009 14:27:09 +1000
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: virtio_net: Set correct gso->hdr_len

On Fri, Jun 05, 2009 at 01:51:05PM +0930, Rusty Russell wrote:
>
> But are we allowed to make the assumption that skb_headlen() == 
> skb_transport_header(skb) + sizeof(transport header) ?  Or should we be 
> checking that here?

We don't care.  We just want to preserve whatever the OS gave us.
If it's bogus, the backend will reject it or fix it up.

> Also how did this ever work?  Why are we getting packets through at all?

Because the backend fixed it up.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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