netdev - Re: [PATCH net-next] net/sched: cls_flower: Add user specified data

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Date:   Tue, 17 Jan 2017 13:53:04 +0200
From:   Paul Blakey <paulb@...lanox.com>
To:     Jamal Hadi Salim <jhs@...atatu.com>, Jiri Pirko <jiri@...nulli.us>
CC:     <paulb@...lanox.com>, John Fastabend <john.fastabend@...il.com>,
        "David S. Miller" <davem@...emloft.net>, <netdev@...r.kernel.org>,
        Jiri Pirko <jiri@...lanox.com>,
        Hadar Hen Zion <hadarh@...lanox.com>,
        Or Gerlitz <ogerlitz@...lanox.com>,
        Roi Dayan <roid@...lanox.com>, Roman Mashak <mrv@...atatu.com>
Subject: Re: [PATCH net-next] net/sched: cls_flower: Add user specified data



On 17/01/2017 13:23, Jamal Hadi Salim wrote:
> On 17-01-16 04:51 AM, Jiri Pirko wrote:
>> Mon, Jan 16, 2017 at 08:54:18AM CET, paulb@...lanox.com wrote:
>>>
>>>
>
>>
>> I think we should do it in a generic way, for every classifier, right
>> away. Same as Jamal is doing for actions. I think that first we should
>> get Jamal's patch merged and then do the same for classifiers.
>>
>
> Should be "trivial" like my patch.
> Add a new TLV type in TCA_XXX enum in rtnetlink.h
> in  tc_ctl_tfilter look for it and memcpy it
> in tcf_fill_node set it on the new TCA_XXX if the cls struct
> has it present.
>

That's exactly what I did before I realized it won't work per internal 
element (per handle), which is what I want. see my example.

So I'll probably implement it like actions dumping/init works - 
tcf_exts_init, tcf_exts_dump (calling a generic functions on all 
classifiers who want this).
I'll add something like get_cookie, dump_cookie. which get/set the 
TCA_COOKIE.


Thanks,
Paul.

> Look at my patch (1 of 2) which I just reposted.
>
> cheers,
> jamal