Re: [PATCH 22/25] xen: xen-netfront: use skb.cb for storing private data

Herbert Xu
2007-04-29T08:08:04Z

On Sun, Apr 29, 2007 at 12:43:33AM -0700, Jeremy Fitzhardinge wrote:
> Herbert Xu wrote:
> > BTW, the version I posted to you is missing the following line.
> >
> > --- linux-2.6.20.i386/drivers/xen/core/skbuff.c 2007-04-28 15:30:16.000000000 +1000
> > +++ build-2.6.20.i386/drivers/xen/core/skbuff.c 2007-04-28 15:30:52.000000000 +1000
> > @@ -89,6 +89,7 @@
> > skb->h.raw = (unsigned char *)skb->nh.iph + 4*skb->nh.iph->ihl;
> > if (skb->h.raw >= skb->tail)
> > goto out;
> > + skb->csum_start = skb->h.raw - skb->head;
> > switch (skb->nh.iph->protocol) {
> > case IPPROTO_TCP:
> > skb->csum_offset = offsetof(struct tcphdr, check);
> >
>
> drivers/xen/core/skbuff.c? What's that?

It's part of the skb_checksum_setup function which we still need
for this because the current netback protocol doesn't pass the
csum_start and csum_offset values along.

Cheers,
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