[PATCH 3/7] selftests/ftrace: Add "requires:" list support

Masami Hiramatsu
2020-06-01T14:42:40Z

Introduce "requires:" list to check required ftrace interface
for each test. This will simplify the interface checking code
and unify the error message. Another good point is, it can
skip the ftrace initializing.

Note that this requires list must be written as a shell
comment.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
tools/testing/selftests/ftrace/ftracetest | 8 +++++++-
tools/testing/selftests/ftrace/test.d/functions | 9 +++++++++
tools/testing/selftests/ftrace/test.d/template | 1 +
3 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/ftrace/ftracetest b/tools/testing/selftests/ftrace/ftracetest
index d3f6652311ef..cdf7940b6610 100755
--- a/tools/testing/selftests/ftrace/ftracetest
+++ b/tools/testing/selftests/ftrace/ftracetest
@@ -267,6 +267,11 @@ testcase() { # testfile
prlog -n "[$CASENO]$INSTANCE$desc"
}

+checkreq() { # testfile
+ requires=`grep "^#[ \t]*requires:" $1 | cut -f2- -d:`
+ check_requires $requires
+}
+
test_on_instance() { # testfile
grep -q "^#[ \t]*flags:.*instance" $1
}
@@ -356,7 +361,8 @@ trap 'SIG_RESULT=$XFAIL' $SIG_XFAIL

__run_test() { # testfile
# setup PID and PPID, $$ is not updated.
- (cd $TRACING_DIR; read PID _ < /proc/self/stat; set -e; set -x; initialize_ftrace; . $1)
+ (cd $TRACING_DIR; read PID _ < /proc/self/stat; set -e; set -x;
+ checkreq $1; initialize_ftrace; . $1)
[ $? -ne 0 ] && kill -s $SIG_FAIL $SIG_PID
}

diff --git a/tools/testing/selftests/ftrace/test.d/functions b/tools/testing/selftests/ftrace/test.d/functions
index 697c77ef2e2b..5100eb1ada0f 100644
--- a/tools/testing/selftests/ftrace/test.d/functions
+++ b/tools/testing/selftests/ftrace/test.d/functions
@@ -113,6 +113,15 @@ initialize_ftrace() { # Reset ftrace to initial-state
enable_tracing
}

+check_requires() { # Check required files
+ for i in $* ; do
+ if [ ! -e $i ]; then
+ echo "Required feature interface $i doesn't exist."
+ exit_unsupported
+ fi
+ done
+}
+
LOCALHOST=127.0.0.1

yield() {
diff --git a/tools/testing/selftests/ftrace/test.d/template b/tools/testing/selftests/ftrace/test.d/template
index e1a5d14c4eaf..d679e5c9e1ee 100644
--- a/tools/testing/selftests/ftrace/test.d/template
+++ b/tools/testing/selftests/ftrace/test.d/template
@@ -1,6 +1,7 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: %HERE DESCRIBE WHAT THIS DOES%
+# requires: %HERE LIST UP REQUIRED FILES%
# you have to add ".tc" extention for your testcase file
# Note that all tests are run with "errexit" option.