netdev - Re: Advice on user space application integration with tc

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Date:   Tue, 16 May 2017 10:22:29 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Morgan Yang <morgan.yang1982@...il.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: Advice on user space application integration with tc

On Mon, May 15, 2017 at 1:33 PM, Morgan Yang <morgan.yang1982@...il.com> wrote:
> I tried on both stock CentOS 7.3 and Ubuntu 16.04 and tc-skbmod was not
> support (I built tc from the latest versions of iproute2). For tc-pedit,
> examples from man tc-pedit such as "pedit ex munge" were not supported, but
> "pedit munge offset" is.

act skbmod is new, it is introduced by:

commit 86da71b57383d40993cb90baafb3735cffe5d800
Author: Jamal Hadi Salim <jhs@...atatu.com>
Date:   Mon Sep 12 20:13:09 2016 -0400

    net_sched: Introduce skbmod action

For pedit, "ex", as it implies, it is an extended feature which was
introduced in:

commit 71d0ed7079dffbc5cd0941d77d9b84e04109c9bb
Author: Amir Vadai <amir@...ai.me>
Date:   Tue Feb 7 09:56:07 2017 +0200

    net/act_pedit: Support using offset relative to the conventional
network headers