linux-kernel - Re: [PATCH net 1/3] selftests: net: lib: support errexit with busywait

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Message-ID: <9c32a07a-9af0-479d-92d3-1d3076f76e15@kernel.org>
Date: Wed, 5 Jun 2024 11:58:41 +0200
From: Matthieu Baerts <matttbe@...nel.org>
To: Hangbin Liu <liuhangbin@...il.com>
Cc: mptcp@...ts.linux.dev, "David S. Miller" <davem@...emloft.net>,
 Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>, Shuah Khan <shuah@...nel.org>,
 Petr Machata <petrm@...dia.com>, netdev@...r.kernel.org,
 linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
 stable@...r.kernel.org, Geliang Tang <geliang@...nel.org>
Subject: Re: [PATCH net 1/3] selftests: net: lib: support errexit with
 busywait

Hi Hangbin,

Thank you for your reply!

On 05/06/2024 11:44, Hangbin Liu wrote:
> On Wed, Jun 05, 2024 at 11:21:16AM +0200, Matthieu Baerts (NGI0) wrote:
>> If errexit is enabled ('set -e'), loopy_wait -- or busywait and others
>> using it -- will stop after the first failure.
>>
>> Note that if the returned status of loopy_wait is checked, and even if
>> errexit is enabled, Bash will not stop at the first error.
>>
>> Fixes: 25ae948b4478 ("selftests/net: add lib.sh")
> 
> Not sure if the fixes tag should be c5341bcc337c ("selftests: mlxsw: Add a
> self-test for port-default priority"), so the fixes could be backported to
> stable kernel for forwarding/lib.sh.

Good point, I didn't notice it was coming from there.

I don't think that's needed: 'net/forwarding/lib.sh' is far from being
compatible with 'errexit', please look at all the utilisations of '$?'.

For 'net/lib.sh', that's different: some functions explicitly check for
'errexit' support. If I'm not mistaken, I fixed the only place where it
was not compatible with 'errexit'.

> Others looks good to me.
> 
> Reviewed-by: Hangbin Liu <liuhangbin@...il.com>

Thank you for the review!

Cheers,
Matt
-- 
Sponsored by the NGI0 Core fund.