linux-kernel - Re: [PATCH bpf-next v1 2/3] selftests/bpf: Add socketpair to create

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Message-ID: <lk2bgh3pmpgch2n5yfjiyhak66oty3cndhbasnpfn2x457rv7i@mvpb4ctmypxh>
Date: Fri, 28 Feb 2025 12:51:42 +0800
From: Jiayuan Chen <jiayuan.chen@...ux.dev>
To: John Fastabend <john.fastabend@...il.com>
Cc: Cong Wang <xiyou.wangcong@...il.com>, cong.wang@...edance.com, 
	jakub@...udflare.com, davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, 
	pabeni@...hat.com, horms@...nel.org, andrii@...nel.org, eddyz87@...il.com, 
	mykolal@...com, ast@...nel.org, daniel@...earbox.net, martin.lau@...ux.dev, 
	song@...nel.org, yonghong.song@...ux.dev, kpsingh@...nel.org, sdf@...ichev.me, 
	haoluo@...gle.com, jolsa@...nel.org, shuah@...nel.org, mhal@...x.co, 
	sgarzare@...hat.com, netdev@...r.kernel.org, bpf@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org, mrpre@....com
Subject: Re: [PATCH bpf-next v1 2/3] selftests/bpf: Add socketpair to
 create_pair to support unix socket

On Thu, Feb 27, 2025 at 02:21:41PM -0800, John Fastabend wrote:
> On 2025-02-27 11:52:04, Cong Wang wrote:
> > On Wed, Feb 26, 2025 at 09:22:41PM +0800, Jiayuan Chen wrote:
> > > Current wrapper function create_pair() is used to create a pair of
> > > connected links and returns two fds, but it does not support unix sockets.
> > > 
> > > Here we introduce socketpair() into create_pair(), which supports creating
> > > a pair of unix sockets, since the semantics of the two are the same.
> > 
> > Since it is only for UDS and only has effectively 1 line of code, how
> > about just calling socketpair(AF_UNIX) in your patch 3/3?
> 
> If we run that test with more than AF_UNIX it might be best as is. I
> think there might be some value testing that flow on TCP/UDP even if
> its not related to the bug.
> 
> Thanks,
> John
Thanks, John! I'll make selftest cover more types of sockets.