Hello Eric!
Am Freitag, 16. Oktober 2015, 08:23:49 schrieb Eric Dumazet:
> On Thu, 2015-08-06 at 17:15 -0700, Jesse Gross wrote:
> > On Mon, Aug 3, 2015 at 10:11 AM, Tom Herbert <t...@herbertland.com> wrote:
> > > For GRO to work with sit we need gro_receive and gro_complete populated
> > > in the sit_offload structure.
> > >
> > > Signed-off-by: Tom Herbert <t...@herbertland.com>
> >
> > You might want to checkout the recent history on this file unless
> > there's something that's changed in the last couple of weeks:
> >
> > commit fdbf5b097bbd9693a86c0b8bfdd071a9a2117cfc
> > Author: Herbert Xu <herb...@gondor.apana.org.au>
> > Date: Mon Jul 20 17:55:38 2015 +0800
> >
> > Revert "sit: Add gro callbacks to sit_offload"
> >
> > This patch reverts 19424e052fb44da2f00d1a868cbb51f3e9f4bbb5 ("sit:
> > Add gro callbacks to sit_offload") because it generates packets
> > that cannot be handled even by our own GSO.
> >
> > Reported-by: Wolfgang Walter <li...@stwm.de>
> > Signed-off-by: Herbert Xu <herb...@gondor.apana.org.au>
> > Signed-off-by: David S. Miller <da...@davemloft.net>
> >
> > --
>
> What about the following more complete patch ?
>
> We properly set skb->encapsulation and inner network header as some NIC
> drivers depend on it. Our GSO should also work properly I think.
>
> Wolfgang, could you please test it ? (this is a patch on top of David
> Miller net-next tree)
>
> Both Google and Facebook are eager to get proper GRO/SIT support ;)
>
> Thanks !
In the moment I can't test it, sorry.
Will test it next week. But as I see you already did that yourself.
>
> diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c
> index 08b62047c67f..eeca943f12dc 100644
> --- a/net/ipv6/ip6_offload.c
> +++ b/net/ipv6/ip6_offload.c
> @@ -264,6 +264,9 @@ static int ipv6_gro_complete(struct sk_buff *skb, int
> nhoff) struct ipv6hdr *iph = (struct ipv6hdr *)(skb->data + nhoff);
> int err = -ENOSYS;
>
> + if (skb->encapsulation)
> + skb_set_inner_network_header(skb, nhoff);
> +
> iph->payload_len = htons(skb->len - nhoff - sizeof(*iph));
>
> rcu_read_lock();
> @@ -280,6 +283,13 @@ out_unlock:
> return err;
> }
>
> +static int sit_gro_complete(struct sk_buff *skb, int nhoff)
> +{
> + skb->encapsulation = 1;
> + skb_shinfo(skb)->gso_type |= SKB_GSO_SIT;
> + return ipv6_gro_complete(skb, nhoff);
> +}
> +
> static struct packet_offload ipv6_packet_offload __read_mostly = {
> .type = cpu_to_be16(ETH_P_IPV6),
> .callbacks = {
> @@ -292,6 +302,8 @@ static struct packet_offload ipv6_packet_offload
> __read_mostly = { static const struct net_offload sit_offload = {
> .callbacks = {
> .gso_segment = ipv6_gso_segment,
> + .gro_receive = ipv6_gro_receive,
> + .gro_complete = sit_gro_complete,
> },
> };
Thank you very much,
--
Wolfgang Walter
Studentenwerk München
Anstalt des öffentlichen Rechts
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