netdev - Re: [PATCH net-next v4 1/2] net sched actions: Add support for user cookies

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Message-ID: <20170117145903.GA17991@penelope.horms.nl>
Date:   Tue, 17 Jan 2017 15:59:04 +0100
From:   Simon Horman <simon.horman@...ronome.com>
To:     Jamal Hadi Salim <jhs@...atatu.com>
Cc:     davem@...emloft.net, netdev@...r.kernel.org, jiri@...lanox.com,
        paulb@...lanox.com, john.fastabend@...il.com, mrv@...atatu.com,
        hadarh@...lanox.com, ogerlitz@...lanox.com, roid@...lanox.com,
        xiyou.wangcong@...il.com, daniel@...earbox.net
Subject: Re: [PATCH net-next v4 1/2] net sched actions: Add support for user
 cookies

On Tue, Jan 17, 2017 at 06:11:48AM -0500, Jamal Hadi Salim wrote:
> From: Jamal Hadi Salim <jhs@...atatu.com>
> 
> Introduce optional 128-bit action cookie.
> Like all other cookie schemes in the networking world (eg in protocols
> like http or existing kernel fib protocol field, etc) the idea is to save
> user state that when retrieved serves as a correlator. The kernel
> _should not_ intepret it.  The user can store whatever they wish in the
> 128 bits.
> 
> Sample exercise(showing variable length use of cookie)

Hi Jamal,

I think that Daniel made some worthwhile comments regarding the
implementation but schematically I like what I see:

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