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selftests/tracing: Test only toplevel README file not the instances

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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

Link: https://lore.kernel.org/r/20250220185846.130216270@goodmis.org
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Steven Rostedt 2025-02-20 13:58:00 -05:00 committed by Shuah Khan
parent a64dcfb451
commit 4a3134b114
1 changed files with 7 additions and 1 deletions
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8
tools/testing/selftests/ftrace/test.d/functions
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@ -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