linux-kernel - [PATCH 2/2] ftrace/selftest: absence of modules/programs should trigger unsupported errors

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Date:   Thu,  6 Feb 2020 15:09:20 +0000
From:   Alan Maguire <alan.maguire@...cle.com>
To:     rostedt@...dmis.org, shuah@...nel.org, mhiramat@...nel.org
Cc:     mingo@...hat.com, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org, naveen.n.rao@...ux.vnet.ibm.com,
        colin.king@...onical.com
Subject: [PATCH 2/2] ftrace/selftest: absence of modules/programs should trigger unsupported errors

In a number of cases, the ftrace tests check for the presence of
ftrace testing-related modules (ftrace-direct, trace-printk) and
programs (checkbashisms), returning exit_unresolved if these
are not found.  The problem is, exit_unresolved causes execution
of ftracetest to return an error, when really our tests are
failing due to not having the requisite kernel configuration/tools
present, which is I think more of an unsupported error condition.
With these fixed, we see no unresolved test cases and ftracetest
returns success ("ok" when run via kselftest).

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: ff431b1390cb ("selftests/ftrace: Add a test to probe module functions")
Fixes: 4a075bd4e13f ("selftests/ftrace: Add checkbashisms meta-testcase")
Signed-off-by: Alan Maguire <alan.maguire@...cle.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 +-
 tools/testing/selftests/ftrace/test.d/selftest/bashisms.tc     | 2 +-
 6 files changed, 6 insertions(+), 6 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 9330c87..fc22ac0 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
diff --git a/tools/testing/selftests/ftrace/test.d/selftest/bashisms.tc b/tools/testing/selftests/ftrace/test.d/selftest/bashisms.tc
index 1b081e9..1b339bd 100644
--- a/tools/testing/selftests/ftrace/test.d/selftest/bashisms.tc
+++ b/tools/testing/selftests/ftrace/test.d/selftest/bashisms.tc
@@ -9,7 +9,7 @@ fi
 
 if ! which checkbashisms > /dev/null 2>&1 ; then
   echo "No checkbashisms found. skipped."
-  exit_unresolved
+  exit_unsupported
 fi
 
 checkbashisms $FTRACETEST_ROOT/ftracetest
-- 
1.8.3.1