netdev - Re: [PATCH net-next v8 2/3] net sched actions: dump more than TCA_ACT_MAX

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Date:   Fri, 28 Apr 2017 16:02:08 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     Jamal Hadi Salim <jhs@...atatu.com>
Cc:     davem@...emloft.net, xiyou.wangcong@...il.com,
        eric.dumazet@...il.com, netdev@...r.kernel.org,
        Simon Horman <simon.horman@...ronome.com>,
        Benjamin LaHaise <bcrl@...ck.org>
Subject: Re: [PATCH net-next v8 2/3] net sched actions: dump more than
 TCA_ACT_MAX_PRIO actions per batch

Fri, Apr 28, 2017 at 03:42:31PM CEST, jhs@...atatu.com wrote:
>On 17-04-28 09:21 AM, Jiri Pirko wrote:
>> Fri, Apr 28, 2017 at 02:30:17PM CEST, jhs@...atatu.com wrote:
>> > On 17-04-28 03:02 AM, Jiri Pirko wrote:
>> > > Fri, Apr 28, 2017 at 03:22:53AM CEST, jhs@...atatu.com wrote:
>> > 
>> > [..]
>> > > > Maybe I am misunderstanding:
>> > > > Recall, this is what it looks like with this patchset:
>> > > > <nlh><subsytem-header>[TCA_ROOT_XXXX]
>> > > > 
>> > > > TCA_ROOT_XXX is very subsystem specific. classifiers, qdiscs and many
>> > > > subsystems defined their own semantics for that TLV level. This specific
>> > > > "dump max" is very very specific to actions. They were crippled by the
>> > > > fact you could only send 32 at a time - this allows more to be sent.
>
>> > > 
>> > > All I suggest is to replace NLA_U32 flags you want that does not
>> > > have any semantics with NLA_FLAGS flags, which eventually will carry
>> > > the exact same u32, but with predefined semantics, helpers, everything.
>> > > 
>> > 
>> > I didnt understand fully Jiri. Are you suggesting a new type called
>> > NLA_FLAGS which is re-usable elsewhere?
>> 
>> Exactly. That's what I'm saying.
>> 
>
>If you want to make it general:
>I see the semantics of this thing as more detailed than what I had.
>It would have a u32 bitmap + u32 bitmask.

Sure, lets make this nice.