netdev - Re: [PATCH net-next v2 0/2] flow_dissector, cls_flower: Add support for multiple MPLS Label Stack Entries

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Date:   Mon, 25 May 2020 17:38:18 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     gnault@...hat.com
Cc:     kuba@...nel.org, netdev@...r.kernel.org, jhs@...atatu.com,
        xiyou.wangcong@...il.com, jiri@...lanox.com,
        benjamin.lahaise@...ronome.com, tom@...bertland.com,
        pieter.jansenvanvuuren@...ronome.com, pablo@...filter.org,
        liels@...lanox.com, ronye@...lanox.com
Subject: Re: [PATCH net-next v2 0/2] flow_dissector, cls_flower: Add
 support for multiple MPLS Label Stack Entries

From: Guillaume Nault <gnault@...hat.com>
Date: Thu, 21 May 2020 19:47:08 +0200

> Currently, the flow dissector and the Flower classifier can only handle
> the first entry of an MPLS label stack. This patch series generalises
> the code to allow parsing and matching the Label Stack Entries that
> follow.
> 
> Patch 1 extends the flow dissector to parse MPLS LSEs until the Bottom
> Of Stack bit is reached. The number of parsed LSEs is capped at
> FLOW_DIS_MPLS_MAX (arbitrarily set to 7). Flower and the NFP driver
> are updated to take into account the new layout of struct
> flow_dissector_key_mpls.
> 
> Patch 2 extends Flower. It defines new netlink attributes, which are
> independent from the previous MPLS ones. Mixing the old and the new
> attributes in a same filter is not allowed. For backward compatibility,
> the old attributes are used when dumping filters that don't require the
> new ones.
> 
> Changes since v1:
>   * Fix compilation of NFP driver (kbuild test robot).
>   * Fix sparse warning with entropy label (kbuild test robot).

Series applied, thanks.