netdev - Re: [PATCH net-next v5 1/6] net/sched: cls_api: Support hardware miss to tc action

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Message-ID: <Y9VRDCtpKGLjM4C6@vergenet.net>
Date:   Sat, 28 Jan 2023 17:45:00 +0100
From:   Simon Horman <horms@...nel.org>
To:     Paul Blakey <paulb@...dia.com>
Cc:     netdev@...r.kernel.org, Saeed Mahameed <saeedm@...dia.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Cong Wang <xiyou.wangcong@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Oz Shlomo <ozsh@...dia.com>, Jiri Pirko <jiri@...dia.com>,
        Roi Dayan <roid@...dia.com>, Vlad Buslov <vladbu@...dia.com>
Subject: Re: [PATCH net-next v5 1/6] net/sched: cls_api: Support hardware
 miss to tc action

On Wed, Jan 25, 2023 at 05:32:13PM +0200, Paul Blakey wrote:
> For drivers to support partial offload of a filter's action list,
> add support for action miss to specify an action instance to
> continue from in sw.
> 
> CT action in particular can't be fully offloaded, as new connections
> need to be handled in software. This imposes other limitations on
> the actions that can be offloaded together with the CT action, such
> as packet modifications.
> 
> Assign each action on a filter's action list a unique miss_cookie
> which drivers can then use to fill action_miss part of the tc skb
> extension. On getting back this miss_cookie, find the action
> instance with relevant cookie and continue classifying from there.
> 
> Signed-off-by: Paul Blakey <paulb@...dia.com>
> Reviewed-by: Jiri Pirko <jiri@...dia.com>

Reviewed-by: Simon Horman <simon.horman@...igine.com>