linux-kernel - [PATCH v2 4/8] perf test: Basic mmap use skip

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Date:   Tue, 17 May 2022 21:20:23 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Riccardo Mancini <rickyman7@...il.com>,
        Sohaib Mohamed <sohaib.amhmd@...il.com>,
        Carsten Haitzler <carsten.haitzler@....com>,
        Marco Elver <elver@...gle.com>,
        John Garry <john.garry@...wei.com>,
        Michael Petlan <mpetlan@...hat.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Stephane Eranian <eranian@...gle.com>,
        Ian Rogers <irogers@...gle.com>
Subject: [PATCH v2 4/8] perf test: Basic mmap use skip

If opening the event fails for basic mmap with EACCES it is more
likely permission related that a true error. Mark the test as skip
in this case and add a skip reason.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/tests/mmap-basic.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c
index c3c17600f29c..30bbe144648a 100644
--- a/tools/perf/tests/mmap-basic.c
+++ b/tools/perf/tests/mmap-basic.c
@@ -31,7 +31,7 @@
  */
 static int test__basic_mmap(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
 {
-	int err = -1;
+	int err = TEST_FAIL;
 	union perf_event *event;
 	struct perf_thread_map *threads;
 	struct perf_cpu_map *cpus;
@@ -83,6 +83,10 @@ static int test__basic_mmap(struct test_suite *test __maybe_unused, int subtest
 		evsels[i] = evsel__newtp("syscalls", name);
 		if (IS_ERR(evsels[i])) {
 			pr_debug("evsel__new(%s)\n", name);
+			if (PTR_ERR(evsels[i]) == -EACCES) {
+				/* Permissions failure, flag the failure as a skip. */
+				err = TEST_SKIP;
+			}
 			goto out_delete_evlist;
 		}
 
@@ -166,4 +170,14 @@ static int test__basic_mmap(struct test_suite *test __maybe_unused, int subtest
 	return err;
 }
 
-DEFINE_SUITE("Read samples using the mmap interface", basic_mmap);
+static struct test_case tests__basic_mmap[] = {
+	TEST_CASE_REASON("Read samples using the mmap interface",
+			 basic_mmap,
+			 "permissions"),
+	{	.name = NULL, }
+};
+
+struct test_suite suite__basic_mmap = {
+	.desc = "Read samples using the mmap interface",
+	.test_cases = tests__basic_mmap,
+};
-- 
2.36.0.550.gb090851708-goog