netdev - Re: [PATCH net-next 01/38] selftests/net: add lib.sh

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Date: Fri, 24 Nov 2023 16:25:33 +0100
From: Petr Machata <petrm@...dia.com>
To: Petr Machata <petrm@...dia.com>
CC: Hangbin Liu <liuhangbin@...il.com>, <netdev@...r.kernel.org>, "David S.
 Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, "Eric
 Dumazet" <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, "Shuah Khan"
	<shuah@...nel.org>, David Ahern <dsahern@...nel.org>,
	<linux-kselftest@...r.kernel.org>, Po-Hsu Lin <po-hsu.lin@...onical.com>,
	Guillaume Nault <gnault@...hat.com>, Björn Töpel
	<bjorn@...osinc.com>, Ryan Roberts <ryan.roberts@....com>, Andrew Morton
	<akpm@...ux-foundation.org>, Mark Brown <broonie@...nel.org>, "Luis
 Chamberlain" <mcgrof@...nel.org>
Subject: Re: [PATCH net-next 01/38] selftests/net: add lib.sh


Petr Machata <petrm@...dia.com> writes:

> Hangbin Liu <liuhangbin@...il.com> writes:
>
>> +# By default, remove all netns before EXIT.
>> +cleanup_all_ns()
>> +{
>> +	cleanup_ns $NS_LIST
>> +}
>> +trap cleanup_all_ns EXIT
>
> Hmm, OK, this is a showstopper for inclusion from forwarding/lib.sh,
> because basically all users of forwarding/lib.sh use the EXIT trap.
[...]
> So just ignore the bit about including from forwarding/lib.sh.

Actually I take this back. The cleanup should be invoked from where the
init was called. I don't think the library should be auto-invoking it,
the client scripts should. Whether through a trap or otherwise.