netdev - Re: [PATCH iproute2/net-next 7/7] tc: flower: Support matching on ND

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Date:   Tue, 7 Feb 2017 08:50:52 -0800
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Simon Horman <simon.horman@...ronome.com>
Cc:     Jiri Pirko <jiri@...nulli.us>,
        Dinan Gunawardena <dinan.gunawardena@...ronome.com>,
        netdev@...r.kernel.org, oss-drivers@...ronome.com
Subject: Re: [PATCH iproute2/net-next 7/7] tc: flower: Support matching on
 ND

On Mon, 6 Feb 2017 09:44:00 +0100
Simon Horman <simon.horman@...ronome.com> wrote:

> On Thu, Feb 02, 2017 at 06:27:48PM +0100, Jiri Pirko wrote:
> > Thu, Feb 02, 2017 at 11:38:40AM CET, simon.horman@...ronome.com wrote:  
> > >Allow matching on Neighbour Discovery target IP, and source and
> > >destination link-layer addresses for neighbour solicitation and
> > >advertisement messages.
> > >
> > >Sample usage:
> > >
> > >tc qdisc add dev eth0 ingress
> > >
> > >tc filter add dev eth0 protocol ipv6 parent ffff: flower \
> > >	indev eth0 ip_proto icmpv6 type 136 code 0 \
> > >	nd_target 2001:470:7eb3:403:201:8eff:fe22:8fea \
> > >	nd_tll 00:01:8e:22:8f:ea action drop
> > >
> > >Signed-off-by: Simon Horman <simon.horman@...ronome.com>  
> > 
> > 
> > Why you are adding this to iproute2? You only poster RFC for kernel.
> > 
> > Please push to kernel first, let it merge, then send iproute2 support.  
> 
> Hi Jiri,
> 
> I think there is a value in making the user-space code available in
> parallel with the kernel changes to allow testing and so by any interested
> parties.

The problem is that the ABI is not defined until it makes it into upstream
kernel tree. If a set of developers needs tools, then they can keep a temporary
fork (which is what the CAKE developers are doing).

> If this is not acceptable I'm happy to stop doing so. But in my ideal world
> I'd be very happy to see other TC kernel updates accompanied by
> implementations their user-space tool counterparts.

If you want something in right away resend those patches.