netdev - Re: [PATCH net-next V4 3/3] net: Add GRO support for vxlan traffic

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Date:	Tue, 14 Jan 2014 23:47:17 +0200
From:	Or Gerlitz <or.gerlitz@...il.com>
To:	Tom Herbert <therbert@...gle.com>
Cc:	Or Gerlitz <ogerlitz@...lanox.com>,
	David Miller <davem@...emloft.net>,
	Linux Netdev List <netdev@...r.kernel.org>,
	Jerry Chu <hkchu@...gle.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Yan Burman <yanb@...lanox.com>,
	Shlomo Pongratz <shlomop@...lanox.com>
Subject: Re: [PATCH net-next V4 3/3] net: Add GRO support for vxlan traffic

On Tue, Jan 14, 2014 at 7:59 PM, Tom Herbert <therbert@...gle.com> wrote:
>
> On Tue, Jan 14, 2014 at 8:00 AM, Or Gerlitz <ogerlitz@...lanox.com> wrote:
> > Add GRO handlers for vxlann, by using the UDP GRO infrastructure.

[...]
>
> >  /* Notify netdevs that UDP port started listening */
> > -static void vxlan_notify_add_rx_port(struct sock *sk)
> > +static void vxlan_notify_add_rx_port(struct vxlan_sock *vs)
> >  {
> >         struct net_device *dev;
> > +       struct sock *sk = vs->sock->sk;
> >         struct net *net = sock_net(sk);
> >         sa_family_t sa_family = sk->sk_family;
> >         __be16 port = inet_sk(sk)->inet_sport;
> > +       int err;
> > +
> > +       if (sa_family == AF_INET) {

> Is this necessary? What about support for AF_INET6?

Point taken -- the UDP GRO code for both ipv4 and ipv6 would work the same.

So we can export udp_gro_receive/complete from net/ipv4/udp_offload.c
such that they can be referred from net/ipv6/udp_offload.c


>
> > +               err = udp_add_offload(&vs->udp_offloads);
> > +               if (err)
> > +                       pr_warn("vxlan: udp_add_offload failed with status %d\n", err);
> > +       }
> >
> >         rcu_read_lock();
> >         for_each_netdev_rcu(net, dev) {
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