LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Bart Van Assche <bvanassche@acm.org>
To: Christoph Hellwig <hch@lst.de>
Cc: Joel Becker <jlbec@evilplan.org>,
	linux-kernel@vger.kernel.org,
	Bodo Stroesser <bostroesser@gmail.com>,
	"Martin K . Petersen" <martin.petersen@oracle.com>,
	Brendan Higgins <brendanhiggins@google.com>,
	Yanko Kaneti <yaneti@declera.com>,
	Shuah Khan <skhan@linuxfoundation.org>
Subject: Re: [PATCH v4 3/3] configfs: Add unit tests
Date: Tue, 10 Aug 2021 11:45:32 -0700	[thread overview]
Message-ID: <9b1e5c35-1d11-0afa-d382-6f5dc0b14a23@acm.org> (raw)
In-Reply-To: <20210810165029.GA20722@lst.de>

On 8/10/21 9:50 AM, Christoph Hellwig wrote:
> On Mon, Aug 09, 2021 at 11:31:23AM -0700, Bart Van Assche wrote:
>>>> +config CONFIGFS_KUNIT_TEST
>>>> +	bool "Configfs Kunit test" if !KUNIT_ALL_TESTS
>>>> +	depends on CONFIGFS_FS && KUNIT=y
>>>> +	default KUNIT_ALL_TESTS
>>>
>>> Why does it depend on KUNIT=y?  What is the issue with a modular KUNIT
>>> build?
>>
>> The unit tests calls do_mount(). do_mount() has not been exported and
>> hence is not available to kernel modules. Hence the exclusion of KUNIT=m.
> 
> You should probably document that.  But then again this is another
> big red flag that this code should live in userspace.
> 
>>> To me this sounds like userspace would be a better place for these
>>> kinds of tests.
>>
>> Splitting the code that can only be run from inside the kernel (creation
>> of configfs attributes) and the code that can be run from user space and
>> making sure that the two run in a coordinated fashion would involve a
>> significant amount of work. I prefer to keep the current approach.
> 
> But userspace is the right place to do this kind of pathname
> based file system I/O.

Shuah, as selftest maintainer, can you recommend an approach? How about 
splitting patch 3/3 from this series into a kernel module (the code that 
creates the configfs test attributes) and user space code (the code that 
reads and writes the configfs attributes) and adding the user space code 
in a subdirectory of tools/testing/selftests/?

Thanks,

Bart.

  reply	other threads:[~2021-08-10 18:45 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-05  4:35 [PATCH v4 0/3] Restore the kernel v5.13 text attribute write behavior Bart Van Assche
2021-08-05  4:35 ` [PATCH v4 1/3] configfs: " Bart Van Assche
2021-08-05  4:35 ` [PATCH v4 2/3] kunit: Add support for suite initialization and cleanup Bart Van Assche
2021-08-05  4:35 ` [PATCH v4 3/3] configfs: Add unit tests Bart Van Assche
2021-08-09 14:59   ` Christoph Hellwig
2021-08-09 18:31     ` Bart Van Assche
2021-08-10 16:50       ` Christoph Hellwig
2021-08-10 18:45         ` Bart Van Assche [this message]
2021-08-10 20:50           ` Shuah Khan
2021-08-11  9:00             ` Brendan Higgins
2022-03-01 20:03               ` Brendan Higgins
2021-08-10 22:00     ` Brendan Higgins
2021-08-11  3:13       ` Bart Van Assche
2021-08-09 14:56 ` [PATCH v4 0/3] Restore the kernel v5.13 text attribute write behavior Christoph Hellwig

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=9b1e5c35-1d11-0afa-d382-6f5dc0b14a23@acm.org \
    --to=bvanassche@acm.org \
    --cc=bostroesser@gmail.com \
    --cc=brendanhiggins@google.com \
    --cc=hch@lst.de \
    --cc=jlbec@evilplan.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=martin.petersen@oracle.com \
    --cc=skhan@linuxfoundation.org \
    --cc=yaneti@declera.com \
    --subject='Re: [PATCH v4 3/3] configfs: Add unit tests' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).