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Date:   Thu, 11 Aug 2022 15:50:00 -0600
From:   "Daniel Xu" <>
To:     "Kumar Kartikeya Dwivedi" <>
Cc:     "" <>,
        "Alexei Starovoitov" <>,
        "Daniel Borkmann" <>,
        "Andrii Nakryiko" <>,,,,,,
        "" <>
Subject: Re: [PATCH bpf-next v3 0/3] Add more bpf_*_ct_lookup() selftests

Hi Kumar,

On Wed, Aug 10, 2022, at 6:25 PM, Kumar Kartikeya Dwivedi wrote:
> On Thu, 11 Aug 2022 at 01:16, Daniel Xu <> wrote:
>> This patchset adds more bpf_*_ct_lookup() selftests. The goal is to test
>> interaction with netfilter subsystem as well as reading from `struct
>> nf_conn`. The first is important when migrating legacy systems towards
>> bpf. The latter is important in general to take full advantage of
>> connection tracking.
> Thank you for contributing these tests. Feel free to add:
> Acked-by: Kumar Kartikeya Dwivedi <>
> People often look at selftests for usage examples these days, so it's
> great to have coverage + examples for more use cases.

I also want this interaction to still work when I start using it later :).

>> I'll follow this patchset up with support for writing to `struct nf_conn`.
> Please also cc netfilter-devel, netdev, Pablo, and Florian when you send it.


> I think we can directly enable stores to ct->mark, since that is what
> ctnetlink is doing too, so adding another helper for this would be
> unnecessary overhead.




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