linux-kernel - Re: [PATCH v3 00/12] man2: document "new" mount API

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Message-ID: <2025-08-21.1755776865-swank-rusted-doorbell-brads-U3HJFf@cyphar.com>
Date: Thu, 21 Aug 2025 21:49:18 +1000
From: Aleksa Sarai <cyphar@...har.com>
To: Askar Safin <safinaskar@...omail.com>
Cc: alx <alx@...nel.org>, brauner <brauner@...nel.org>, 
	dhowells <dhowells@...hat.com>, "g.branden.robinson" <g.branden.robinson@...il.com>, 
	jack <jack@...e.cz>, linux-api <linux-api@...r.kernel.org>, 
	linux-fsdevel <linux-fsdevel@...r.kernel.org>, linux-kernel <linux-kernel@...r.kernel.org>, 
	linux-man <linux-man@...r.kernel.org>, "mtk.manpages" <mtk.manpages@...il.com>, 
	viro <viro@...iv.linux.org.uk>, Ian Kent <raven@...maw.net>, 
	autofs mailing list <autofs@...r.kernel.org>
Subject: Re: [PATCH v3 00/12] man2: document "new" mount API

On 2025-08-20, Askar Safin <safinaskar@...omail.com> wrote:
>  ---- On Sun, 17 Aug 2025 20:16:04 +0400  Aleksa Sarai <cyphar@...har.com> wrote --- 
>  > They are not tested by fstests AFAICS, but that's more of a flaw in
>  > fstests (automount requires you to have a running autofs daemon, which
>  > probably makes testing it in fstests or selftests impractical) not the
>  > feature itself.
> 
> I suggest testing automounts in fstests/selftests using "tracing" automount.
> This is what I do in my reproducers.
> 
>  > The automount behaviour of tracefs is different to the general automount
>  > mechanism which is managed by userspace with the autofs daemon.
> 
> Yes. But I still was able to write reproducers using "tracing", so this
> automount point is totally okay for tests. (At least for some tests,
> such as RESOLVE_NO_XDEV.)

Sure, but I don't think people use allyesconfig when running selftests.
I wonder if the automated test runners even enable deprecated features
like that.

In any case, you can definitely write some tests for it. :D

-- 
Aleksa Sarai
Senior Software Engineer (Containers)
SUSE Linux GmbH
https://www.cyphar.com/

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