netdev - Re: [PATCH v2 bpf-next 4/6] selftests/bpf: Add IPv4 and IPv6 sockaddr test cases

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Message-ID: <CADKFtnQDJbSFRS4oyEsn3ZBDAN7T6EvxXUNdrz1kU3Bnhzfgug@mail.gmail.com>
Date: Wed, 17 Apr 2024 13:08:02 -0400
From: Jordan Rife <jrife@...gle.com>
To: Martin KaFai Lau <martin.lau@...ux.dev>
Cc: bpf@...r.kernel.org, linux-kselftest@...r.kernel.org, 
	netdev@...r.kernel.org, Alexei Starovoitov <ast@...nel.org>, 
	Daniel Borkmann <daniel@...earbox.net>, Andrii Nakryiko <andrii@...nel.org>, 
	Eduard Zingerman <eddyz87@...il.com>, Song Liu <song@...nel.org>, 
	Yonghong Song <yonghong.song@...ux.dev>, John Fastabend <john.fastabend@...il.com>, 
	KP Singh <kpsingh@...nel.org>, Stanislav Fomichev <sdf@...gle.com>, Hao Luo <haoluo@...gle.com>, 
	Jiri Olsa <jolsa@...nel.org>, Mykola Lysenko <mykolal@...com>, Shuah Khan <shuah@...nel.org>, 
	Kui-Feng Lee <thinker.li@...il.com>, Artem Savkov <asavkov@...hat.com>, 
	Dave Marchevsky <davemarchevsky@...com>, Menglong Dong <imagedong@...cent.com>, Daniel Xu <dxu@...uu.xyz>, 
	David Vernet <void@...ifault.com>, Daan De Meyer <daan.j.demeyer@...il.com>, 
	Willem de Bruijn <willemdebruijn.kernel@...il.com>
Subject: Re: [PATCH v2 bpf-next 4/6] selftests/bpf: Add IPv4 and IPv6 sockaddr
 test cases

> I would like to take this chance to simplify the setup.
>
> Does it need a veth pair? The %s2 interface is not used.
>
> Can it be done in lo alone?

I will look into this for the next spin of the patch series.

> Also, all this setup (and test) has to be done in a new netns. Anything blocking
> the kfunc in patch 2 using the current task netns instead of the init_net?

This should be doable.

> Add nodad to the "ip -6 addr add...". just in case it may add unnecessary delay.
> This interface/address ping should not be needed. Other tests under prog_tests/
> don't need this interface/address ping also.

Ack.

> Can the test_sock_addr.{c,sh} be retired after this patch?

I know it's not used in the BPF CI tests, but is it still used in any
other contexts?

- Jordan