netdev - Re: [PATCH net] ip6_tunnel: fix GRE6 segmentation

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Message-ID: <20210623091458.40fb59c6@kicinski-fedora-PC1C0HJN.hsd1.ca.comcast.net>
Date:   Wed, 23 Jun 2021 09:14:58 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     David Ahern <dsahern@...il.com>
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        yoshfuji@...ux-ipv6.org, dsahern@...nel.org, vfedorenko@...ek.ru
Subject: Re: [PATCH net] ip6_tunnel: fix GRE6 segmentation

On Tue, 22 Jun 2021 21:47:45 -0600 David Ahern wrote:
> On 6/22/21 4:24 PM, Jakub Kicinski wrote:
> >> would be good to capture the GRE use case that found the bug and the
> >> MPLS version as test cases under tools/testing/selftests/net. Both
> >> should be doable using namespaces.  
> > 
> > I believe Vadim is working on MPLS side, how does this look for GRE?
> 
> I like the template you followed. :-)

:)

> The test case looks good to me, thanks for doing it.

Noob question, why do we need that 2 sec wait with IPv6 sometimes?
I've seen it randomly in my local testing as well I wasn't sure if 
it's a bug or expected.

I make a v6 tunnel on top of a VLAN and for 2 secs after creation 
I get the wrong route in ip -6 r g.