netdev - Re: [patch net-next v4 1/2] tc: add BPF based action

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Date:	Wed, 14 Jan 2015 11:27:23 -0800
From:	Cong Wang <cwang@...pensource.com>
To:	Jiri Pirko <jiri@...nulli.us>
Cc:	netdev <netdev@...r.kernel.org>,
	David Miller <davem@...emloft.net>,
	Jamal Hadi Salim <jhs@...atatu.com>,
	Daniel Borkmann <dborkman@...hat.com>,
	Alexei Starovoitov <ast@...mgrid.com>,
	Hannes Frederic Sowa <hannes@...hat.com>
Subject: Re: [patch net-next v4 1/2] tc: add BPF based action

On Wed, Jan 14, 2015 at 9:43 AM, Jiri Pirko <jiri@...nulli.us> wrote:
> This action provides a possibility to exec custom BPF code.
>

I still don't like it, sorry, not just for your patch, I never like
cls_bpf either, in terms of the user interface and the duplicated
functionalities: cls_bpf vs u32, act_bpf vs gact.

Ideally we should be able to implement them with the same
interface, transparent to users, I think probably because
the nature of bpf implementation somewhat enforces such
interface everywhere, it is clearly overrated.

(I have no idea about eBPF though.)
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