[PATCH blktests] nvme/046: add test for unprivileged passthrough

[Kanchan Joshi]

On Fri, Feb 10, 2023 at 02:01:14AM +0000, Shinichiro Kawasaki wrote:
>On Feb 09, 2023 / 15:15, Kanchan Joshi wrote:
>> Ths creates a non-root user "blktest46", alters permissions for
>> char-device node (/dev/ngX) and runs few passthrough commands.
>> At the end of the test, user is deleted and permissions are reverted.
>>
>> Signed-off-by: Kanchan Joshi <joshi.k at samsung.com>
>
>Thanks for the patch. I guess this test case exercises nvme_cmd_allowed() in
>drivers/nvme/host/ioctl.c.

Yes. Thanks for review.
>The test contents look valid and good.
>
>This test case adds and deletes a user. For every test case run, it creates and
>removes the user home directory and touches /etc files. It does not sound right
>for me. It changes system set up, and sudden test case stop will leave the user.
>
>I suggest to ask blktests users to prepare the normal user and specify it to a
>config file variable (it can be named NORMAL_USER or something). I also suggest
>to add two new helper functions: _require_user() will check that the specified
>user is valid, and _run_user() will wrap the "su $NORMAL_USER -c" command line.

I was trying to make this automatic for blktests users.
Script attempts cleanup always (regardless of test-failure).
But yes, if any command gets stuck, cleanup won't happen.
So what you mentioned - sounds fine to me.

>If you don't mind, I can create another patch for further discussion based on
>the suggestion above, and modify your patch to use the new helper functions.
Sure. Please remove "_have_fio" line also in v2.