linux-kernel - Re: [PATCH] selftests/tracing: Test only toplevel README file not the instances

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Message-ID: <20250115202607.00c6d353@gandalf.local.home>
Date: Wed, 15 Jan 2025 20:26:07 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: LKML <linux-kernel@...r.kernel.org>, Linux Trace Kernel
 <linux-trace-kernel@...r.kernel.org>, linux-kselftest@...r.kernel.org
Cc: Masami Hiramatsu <mhiramat@...nel.org>, Mathieu Desnoyers
 <mathieu.desnoyers@...icios.com>, Shuah Khan <shuah@...nel.org>
Subject: Re: [PATCH] selftests/tracing: Test only toplevel README file not
 the instances

On Wed, 15 Jan 2025 19:17:58 -0500
Steven Rostedt <rostedt@...dmis.org> wrote:

> From: Steven Rostedt <rostedt@...dmis.org>
> 
> For the tests that have both a README attribute as well as the instance
> flag to run the tests as an instance, the instance version will always
> exit with UNSUPPORTED. That's because the instance directory does not
> contain a README file. Currently, the tests check for a README file in the
> directory that the test runs in and if there's a requirement for something
> to be present in the README file, it will not find it, as the instance
> directory doesn't have it.
> 
> Have the tests check if the current directory is an instance directory,
> and if it is, check two directories above the current directory for the
> README file:
> 
>   /sys/kernel/tracing/README
>   /sys/kernel/tracing/instances/foo/../../README

This is the same patch as:

  https://lore.kernel.org/all/20250116012041.326701057@goodmis.org/

But as there are other patches that depended on it, I just added this one
into a patch set with them. But decided not to make that patch set a v2 as
there was no changes with this one.

Damn, I forgot to add Shuah and kselftests mailing list to that one though :-p

-- Steve


> 
> Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
> ---
>  tools/testing/selftests/ftrace/test.d/functions | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/ftrace/test.d/functions b/tools/testing/selftests/ftrace/test.d/functions
> index 779f3e62ec90..9f2a67fbaf4d 100644
> --- a/tools/testing/selftests/ftrace/test.d/functions
> +++ b/tools/testing/selftests/ftrace/test.d/functions
> @@ -156,7 +156,13 @@ check_requires() { # Check required files and tracers
>                  exit_unsupported
>              fi
>          elif [ "$r" != "$i" ]; then
> -            if ! grep -Fq "$r" README ; then
> +	    # If this is an instance, check the top directory
> +	    if echo $TRACING_DIR | grep -q "/instances/"; then
> +		test="$TRACING_DIR/../.."
> +	    else
> +		test=$TRACING_DIR
> +	    fi
> +            if ! grep -Fq "$r" $test/README ; then
>                  echo "Required feature pattern \"$r\" is not in README."
>                  exit_unsupported
>              fi