linux-kernel - [PATCH] selftests/ftrace: treat module requirement unmet situation as unsupported

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Date:   Wed, 29 Apr 2020 17:50:44 +0800
From:   Po-Hsu Lin <po-hsu.lin@...onical.com>
To:     linux-kselftest@...r.kernel.org
Cc:     rostedt@...dmis.org, mingo@...hat.com, shuah@...nel.org,
        colin.king@...onical.com, mhiramat@...nel.org,
        yangx.jy@...fujitsu.com, linux-kernel@...r.kernel.org,
        po-hsu.lin@...onical.com
Subject: [PATCH] selftests/ftrace: treat module requirement unmet situation as unsupported

When the required module for the test does not exist, use
exit_unsupported instead of exit_unresolved to indicate this test is
not supported.

By doing this we can make test behaviour in sync with the
irqsoff_tracer.tc test in preemptirq, which is also treating module
existence in this way. Moreover, the test won't exit with a non-zero
return value if the module does not exist.

Fixes: 646f01ccdd59 ("ftrace/selftest: Add tests to test register_ftrace_direct()")
Fixes: 4d23e9b4fd2e ("selftests/ftrace: Add trace_printk sample module test")
Fixes: 7bc026d6c032 ("selftests/ftrace: Add function filter on module testcase")
Fixes: af2a0750f374 ("selftests/ftrace: Improve kprobe on module testcase to load/unload module")
Signed-off-by: Po-Hsu Lin <po-hsu.lin@...onical.com>
---
 tools/testing/selftests/ftrace/test.d/direct/ftrace-direct.tc  | 2 +-
 tools/testing/selftests/ftrace/test.d/direct/kprobe-direct.tc  | 2 +-
 tools/testing/selftests/ftrace/test.d/event/trace_printk.tc    | 2 +-
 tools/testing/selftests/ftrace/test.d/ftrace/func_mod_trace.tc | 2 +-
 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_module.tc  | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/tools/testing/selftests/ftrace/test.d/direct/ftrace-direct.tc b/tools/testing/selftests/ftrace/test.d/direct/ftrace-direct.tc
index d75a869..3d6189e 100644
--- a/tools/testing/selftests/ftrace/test.d/direct/ftrace-direct.tc
+++ b/tools/testing/selftests/ftrace/test.d/direct/ftrace-direct.tc
@@ -5,7 +5,7 @@
 rmmod ftrace-direct ||:
 if ! modprobe ftrace-direct ; then
   echo "No ftrace-direct sample module - please make CONFIG_SAMPLE_FTRACE_DIRECT=m"
-  exit_unresolved;
+  exit_unsupported;
 fi
 
 echo "Let the module run a little"
diff --git a/tools/testing/selftests/ftrace/test.d/direct/kprobe-direct.tc b/tools/testing/selftests/ftrace/test.d/direct/kprobe-direct.tc
index 801ecb6..3d0e3ca 100644
--- a/tools/testing/selftests/ftrace/test.d/direct/kprobe-direct.tc
+++ b/tools/testing/selftests/ftrace/test.d/direct/kprobe-direct.tc
@@ -5,7 +5,7 @@
 rmmod ftrace-direct ||:
 if ! modprobe ftrace-direct ; then
   echo "No ftrace-direct sample module - please build with CONFIG_SAMPLE_FTRACE_DIRECT=m"
-  exit_unresolved;
+  exit_unsupported;
 fi
 
 if [ ! -f kprobe_events ]; then
diff --git a/tools/testing/selftests/ftrace/test.d/event/trace_printk.tc b/tools/testing/selftests/ftrace/test.d/event/trace_printk.tc
index b02550b..dd8b10d 100644
--- a/tools/testing/selftests/ftrace/test.d/event/trace_printk.tc
+++ b/tools/testing/selftests/ftrace/test.d/event/trace_printk.tc
@@ -5,7 +5,7 @@
 rmmod trace-printk ||:
 if ! modprobe trace-printk ; then
   echo "No trace-printk sample module - please make CONFIG_SAMPLE_TRACE_PRINTK=m"
-  exit_unresolved;
+  exit_unsupported;
 fi
 
 echo "Waiting for irq work"
diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/func_mod_trace.tc b/tools/testing/selftests/ftrace/test.d/ftrace/func_mod_trace.tc
index 1a4b4a4..26dc06a 100644
--- a/tools/testing/selftests/ftrace/test.d/ftrace/func_mod_trace.tc
+++ b/tools/testing/selftests/ftrace/test.d/ftrace/func_mod_trace.tc
@@ -13,7 +13,7 @@ echo '*:mod:trace_printk' > set_ftrace_filter
 if ! modprobe trace-printk ; then
   echo "No trace-printk sample module - please make CONFIG_SAMPLE_TRACE_PRINTK=
 m"
-  exit_unresolved;
+  exit_unsupported;
 fi
 
 : "Wildcard should be resolved after loading module"
diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_module.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_module.tc
index d861bd7..4e07c69 100644
--- a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_module.tc
+++ b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_module.tc
@@ -8,7 +8,7 @@ rmmod trace-printk ||:
 if ! modprobe trace-printk ; then
   echo "No trace-printk sample module - please make CONFIG_SAMPLE_TRACE_PRINTK=
 m"
-  exit_unresolved;
+  exit_unsupported;
 fi
 
 MOD=trace_printk
-- 
2.7.4