netdev - Re: [PATCH bpf-next v2 0/7] Add bpf

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Date:   Fri, 10 Jun 2022 22:04:19 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Kumar Kartikeya Dwivedi <memxor@...il.com>,
        Joanne Koong <joannelkoong@...il.com>
Cc:     bpf <bpf@...r.kernel.org>, Alexei Starovoitov <ast@...nel.org>,
        Andrii Nakryiko <andrii@...nel.org>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Vlad Buslov <vladbu@...dia.com>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Toke Høiland-Jørgensen <toke@...hat.com>,
        netdev <netdev@...r.kernel.org>, john.fastabend@...il.com
Subject: Re: [PATCH bpf-next v2 0/7] Add bpf_link based TC-BPF API

Hi Joanne, hi Kumar,

On 6/10/22 9:34 PM, Kumar Kartikeya Dwivedi wrote:
> On Sat, Jun 11, 2022 at 12:37:50AM IST, Joanne Koong wrote:
>> On Fri, Jun 10, 2022 at 10:23 AM Joanne Koong <joannelkoong@...il.com> wrote:
>>> On Fri, Jun 10, 2022 at 5:58 AM Kumar Kartikeya Dwivedi
>>> <memxor@...il.com> wrote:
>>>> On Fri, Jun 10, 2022 at 05:54:27AM IST, Joanne Koong wrote:
>>>>> On Thu, Jun 3, 2021 at 11:31 PM Kumar Kartikeya Dwivedi
>>>>> <memxor@...il.com> wrote:
[...]
>>>> I can have a look at resurrecting it later this month, if you're ok with waiting
>>>> until then, otherwise if someone else wants to pick this up before that it's
>>>> fine by me, just let me know so we avoid duplicated effort. Note that the
>>>> approach in v2 is dead/unlikely to get accepted by the TC maintainers, so we'd
>>>> have to implement the way Daniel mentioned in [0].
>>>
>>> Sounds great! We'll wait and check back in with you later this month.
>>>
>> After reading the linked thread (which I should have done before
>> submitting my previous reply :)),  if I'm understanding it correctly,
>> it seems then that the work needed for tc bpf_link will be in a new
>> direction that's not based on the code in this v2 patchset. I'm
>> interested in learning more about bpf link and tc - I can pick this up
>> to work on. But if this was something you wanted to work on though,
>> please don't hesitate to let me know; I can find some other bpf link
>> thing to work on instead if that's the case.

The tc ingress/egress overhaul we also discussed at lsf/mm/bpf in our session
with John and pretty much is along the lines as in the earlier link you sent.
We need it from Cilium & Tetragon as well, so it's wip from our side at the
moment, modulo the bpf link part. Would you be okay if I pinged you once something
that is plateable is ready?

Thanks,
Daniel