netdev - Re: [PATCH v2 1/2] net, ip6_tunnel: enhance tunnel locate with link check

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Message-ID: <CAJ75kXbDL+vvC9UKWoM4_Zf59Ej8hEOOJT-92L_G9u-j9px1sQ@mail.gmail.com>
Date:   Wed, 5 Feb 2020 18:36:11 +0100
From:   William Dauchy <w.dauchy@...teo.com>
To:     Nicolas Dichtel <nicolas.dichtel@...nd.com>
Cc:     William Dauchy <w.dauchy@...teo.com>,
        NETDEV <netdev@...r.kernel.org>
Subject: Re: [PATCH v2 1/2] net, ip6_tunnel: enhance tunnel locate with link check

On Wed, Feb 5, 2020 at 5:55 PM Nicolas Dichtel
<nicolas.dichtel@...nd.com> wrote:
> Le 05/02/2020 à 17:29, William Dauchy a écrit :
> [snip]
> > diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
> > index b5dd20c4599b..053f44691cc6 100644
> > --- a/net/ipv6/ip6_tunnel.c
> > +++ b/net/ipv6/ip6_tunnel.c
> > @@ -351,7 +351,8 @@ static struct ip6_tnl *ip6_tnl_locate(struct net *net,
> >            (t = rtnl_dereference(*tp)) != NULL;
> >            tp = &t->next) {
> >               if (ipv6_addr_equal(local, &t->parms.laddr) &&
> > -                 ipv6_addr_equal(remote, &t->parms.raddr)) {
> > +                 ipv6_addr_equal(remote, &t->parms.raddr) &&
> > +                 p->link == t->parms.link) {
> >                       if (create)
> >                               return ERR_PTR(-EEXIST);
> This is probably not so easy. If link becomes part of the key, at least
> ip6_tnl_lookup() should also be updated.
> You can also look at ip_tunnel_bind_dev() to check how the mtu is calculated.

indeed, I will update that.
-- 
William