netdev - Re: [net] vxlan: fix vxlan6_get_route() adding a call to xfrm_lookup

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Date:   Mon, 20 Jan 2020 17:02:03 +0100
From:   Andrea Mayer <andrea.mayer@...roma2.it>
To:     Sabrina Dubroca <sd@...asysnail.net>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Petr Machata <petrm@...lanox.com>,
        Stefano Brivio <sbrivio@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Taehee Yoo <ap420073@...il.com>,
        Litao jiao <jiaolitao@...secom.com>,
        Roopa Prabhu <roopa@...ulusnetworks.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Paolo Lungaroni <paolo.lungaroni@...t.it>,
        Andrea Mayer <andrea.mayer@...roma2.it>
Subject: Re: [net] vxlan: fix vxlan6_get_route() adding a call to
 xfrm_lookup_route()

On Thu, 16 Jan 2020 14:28:39 +0100
Andrea Mayer <andrea.mayer@...roma2.it> wrote:

> On Wed, 15 Jan 2020 22:16:21 +0100
> Sabrina Dubroca <sd@...asysnail.net> wrote:
> 
> > 2020-01-15, 20:22:31 +0100, Andrea Mayer wrote:
> > > currently IPSEC cannot be used to encrypt/decrypt IPv6 vxlan traffic.
> > > The problem is that the vxlan module uses the vxlan6_get_route()
> > > function to find out the route for transmitting an IPv6 packet, which in
> > > turn uses ip6_dst_lookup() available in ip6_output.c.
> > > Unfortunately ip6_dst_lookup() does not perform any xfrm route lookup,
> > > so the xfrm framework cannot be used with vxlan6.
> > 
> > That's not the case anymore, since commit 6c8991f41546 ("net:
> > ipv6_stub: use ip6_dst_lookup_flow instead of ip6_dst_lookup").
> > 
> > Can you retest on the latest net tree?
> > 
> > Thanks.
> > 
> > -- 
> > Sabrina
> > 
> 
> Hi Sabrina,
> thanks for sharing the fix.
> Sorry, my net tree was a bit outdated. I will retest with the fix and let you know.
> 
> -- 
> Andrea Mayer <andrea.mayer@...roma2.it>

Hi,
I've tested the new net tree in my setup and now vxlan6 and IPSec seems to work good.

Thanks.

-- 
Andrea Mayer <andrea.mayer@...roma2.it>