netdev - Re: [PATCH/RFC net-next 2/2] net/sched: allow flower to match tunnel options

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Message-ID: <CAJ3xEMgfkpJCfZX-7jaeYtoWTSQQZ6gu8_jSFgcXpzTBpdijQw@mail.gmail.com>
Date:   Tue, 12 Sep 2017 23:23:55 +0300
From:   Or Gerlitz <gerlitz.or@...il.com>
To:     Simon Horman <simon.horman@...ronome.com>
Cc:     Jiri Pirko <jiri@...lanox.com>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Linux Netdev List <netdev@...r.kernel.org>,
        oss-drivers@...ronome.com
Subject: Re: [PATCH/RFC net-next 2/2] net/sched: allow flower to match tunnel options

On Tue, Sep 12, 2017 at 5:20 PM, Simon Horman
<simon.horman@...ronome.com> wrote:
> Allow matching on options in tunnel headers.
> This makes use of existing tunnel metadata support.

Simon,

This patch is about matching on tunnel options, right? but

> Options are a bytestring of up to 256 bytes.
> Tunnel implementations may support less or more options,
> or no options at all.
>
>  # ip link add name geneve0 type geneve dstport 0 external
>  # tc qdisc add dev eth0 ingress
>  # tc qdisc del dev eth0 ingress; tc qdisc add dev eth0 ingress
>  # tc filter add dev eth0 protocol ip parent ffff: \
>      flower indev eth0 \
>         ip_proto udp \
>         action tunnel_key \
>             set src_ip 10.0.99.192 \
>             dst_ip 10.0.99.193 \
>             dst_port 4789 \
>             id 11 \
>             opts 0102800100800022 \
>     action mirred egress redirect dev geneve0

the example here is on how to use tunnel options in the tunnel set key actions..

And the other way around in the other patch... the patch is about the
tunnel key set action and the example shows how to match that in
flower... I guess you want to swap the relevant of the change log.

Anyway, is there any human readable/understandable representation of
these options? e.g what does 0102800100800022 means for geneve?