[PATCH bpf-next] selftests/bpf: Add test result messages for test_task_storage_map_stress_lookup

[Hou Tao <houtao@xxxxxxxxxxxxxxx>]

From: Hou Tao <houtao1@xxxxxxxxxx>

Add test result message when test_task_storage_map_stress_lookup()
succeeds or is skipped. The test case can be skipped due to the choose
of preemption model in kernel config, so export skips in test_maps.c and
increase it when needed.

The following is the output of test_maps when the test case succeeds or
is skipped:

  test_task_storage_map_stress_lookup:PASS
  test_maps: OK, 0 SKIPPED

  test_task_storage_map_stress_lookup SKIP (no CONFIG_PREEMPT)
  test_maps: OK, 1 SKIPPED

Signed-off-by: Hou Tao <houtao1@xxxxxxxxxx>
---
 tools/testing/selftests/bpf/map_tests/task_storage_map.c | 6 +++++-
 tools/testing/selftests/bpf/test_maps.c                  | 2 +-
 tools/testing/selftests/bpf/test_maps.h                  | 2 ++
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/bpf/map_tests/task_storage_map.c b/tools/testing/selftests/bpf/map_tests/task_storage_map.c
index 1adc9c292eb2..aac08c85240b 100644
--- a/tools/testing/selftests/bpf/map_tests/task_storage_map.c
+++ b/tools/testing/selftests/bpf/map_tests/task_storage_map.c
@@ -77,8 +77,11 @@ void test_task_storage_map_stress_lookup(void)
 	CHECK(err, "open_and_load", "error %d\n", err);
 
 	/* Only for a fully preemptible kernel */
-	if (!skel->kconfig->CONFIG_PREEMPT)
+	if (!skel->kconfig->CONFIG_PREEMPT) {
+		printf("%s SKIP (no CONFIG_PREEMPT)\n", __func__);
+		skips++;
 		return;
+	}
 
 	/* Save the old affinity setting */
 	sched_getaffinity(getpid(), sizeof(old), &old);
@@ -119,4 +122,5 @@ void test_task_storage_map_stress_lookup(void)
 	read_bpf_task_storage_busy__destroy(skel);
 	/* Restore affinity setting */
 	sched_setaffinity(getpid(), sizeof(old), &old);
+	printf("%s:PASS\n", __func__);
 }
diff --git a/tools/testing/selftests/bpf/test_maps.c b/tools/testing/selftests/bpf/test_maps.c
index 1581a33b3f70..127c5c438a16 100644
--- a/tools/testing/selftests/bpf/test_maps.c
+++ b/tools/testing/selftests/bpf/test_maps.c
@@ -30,7 +30,7 @@
 #define ENOTSUPP 524
 #endif
 
-static int skips;
+int skips;
 
 static struct bpf_map_create_opts map_opts = { .sz = sizeof(map_opts) };
 
diff --git a/tools/testing/selftests/bpf/test_maps.h b/tools/testing/selftests/bpf/test_maps.h
index 77d8587ac4ed..f6fbca761732 100644
--- a/tools/testing/selftests/bpf/test_maps.h
+++ b/tools/testing/selftests/bpf/test_maps.h
@@ -14,4 +14,6 @@
 	}								\
 })
 
+extern int skips;
+
 #endif
-- 
2.29.2