[PATCH v19 6/8] selftests/clone3: Factor more of main loop into test_clone3()

[Mark Brown <broonie@kernel.org>]

In order to make it easier to add more configuration for the tests and
more support for runtime detection of when tests can be run pass the
structure describing the tests into test_clone3() rather than picking
the arguments out of it and have that function do all the per-test work.

No functional change.

Reviewed-by: Kees Cook <kees@kernel.org>
Tested-by: Kees Cook <kees@kernel.org>
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 tools/testing/selftests/clone3/clone3.c | 77 ++++++++++++++++-----------------
 1 file changed, 37 insertions(+), 40 deletions(-)

diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
index e61f07973ce5..e066b201fa64 100644
--- a/tools/testing/selftests/clone3/clone3.c
+++ b/tools/testing/selftests/clone3/clone3.c
@@ -30,6 +30,19 @@ enum test_mode {
 	CLONE3_ARGS_INVAL_EXIT_SIGNAL_NSIG,
 };
 
+typedef bool (*filter_function)(void);
+typedef size_t (*size_function)(void);
+
+struct test {
+	const char *name;
+	uint64_t flags;
+	size_t size;
+	size_function size_function;
+	int expected;
+	enum test_mode test_mode;
+	filter_function filter;
+};
+
 static int call_clone3(uint64_t flags, size_t size, enum test_mode test_mode)
 {
 	struct __clone_args args = {
@@ -109,30 +122,40 @@ static int call_clone3(uint64_t flags, size_t size, enum test_mode test_mode)
 	return 0;
 }
 
-static bool test_clone3(uint64_t flags, size_t size, int expected,
-			enum test_mode test_mode)
+static void test_clone3(const struct test *test)
 {
+	size_t size;
 	int ret;
 
+	if (test->filter && test->filter()) {
+		ksft_test_result_skip("%s\n", test->name);
+		return;
+	}
+
+	if (test->size_function)
+		size = test->size_function();
+	else
+		size = test->size;
+
+	ksft_print_msg("Running test '%s'\n", test->name);
+
 	ksft_print_msg(
 		"[%d] Trying clone3() with flags %#" PRIx64 " (size %zu)\n",
-		getpid(), flags, size);
-	ret = call_clone3(flags, size, test_mode);
+		getpid(), test->flags, size);
+	ret = call_clone3(test->flags, size, test->test_mode);
 	ksft_print_msg("[%d] clone3() with flags says: %d expected %d\n",
-			getpid(), ret, expected);
-	if (ret != expected) {
+			getpid(), ret, test->expected);
+	if (ret != test->expected) {
 		ksft_print_msg(
 			"[%d] Result (%d) is different than expected (%d)\n",
-			getpid(), ret, expected);
-		return false;
+			getpid(), ret, test->expected);
+		ksft_test_result_fail("%s\n", test->name);
+		return;
 	}
 
-	return true;
+	ksft_test_result_pass("%s\n", test->name);
 }
 
-typedef bool (*filter_function)(void);
-typedef size_t (*size_function)(void);
-
 static bool not_root(void)
 {
 	if (getuid() != 0) {
@@ -160,16 +183,6 @@ static size_t page_size_plus_8(void)
 	return getpagesize() + 8;
 }
 
-struct test {
-	const char *name;
-	uint64_t flags;
-	size_t size;
-	size_function size_function;
-	int expected;
-	enum test_mode test_mode;
-	filter_function filter;
-};
-
 static const struct test tests[] = {
 	{
 		.name = "simple clone3()",
@@ -319,24 +332,8 @@ int main(int argc, char *argv[])
 	ksft_set_plan(ARRAY_SIZE(tests));
 	test_clone3_supported();
 
-	for (i = 0; i < ARRAY_SIZE(tests); i++) {
-		if (tests[i].filter && tests[i].filter()) {
-			ksft_test_result_skip("%s\n", tests[i].name);
-			continue;
-		}
-
-		if (tests[i].size_function)
-			size = tests[i].size_function();
-		else
-			size = tests[i].size;
-
-		ksft_print_msg("Running test '%s'\n", tests[i].name);
-
-		ksft_test_result(test_clone3(tests[i].flags, size,
-					     tests[i].expected,
-					     tests[i].test_mode),
-				 "%s\n", tests[i].name);
-	}
+	for (i = 0; i < ARRAY_SIZE(tests); i++)
+		test_clone3(&tests[i]);
 
 	ksft_finished();
 }

-- 
2.39.5