[PATCH bpf-next v1 4/8] selftests/bpf: test struct_ops map definition with type suffix

[Eduard Zingerman <eddyz87@gmail.com>]

Extend struct_ops_module test case to check if it is possible to use
'___' suffixes for struct_ops type specification.

Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
---
 .../selftests/bpf/bpf_testmod/bpf_testmod.c   |  1 +
 .../bpf/prog_tests/test_struct_ops_module.c   | 32 +++++++++++++------
 .../selftests/bpf/progs/struct_ops_module.c   | 21 +++++++++++-
 3 files changed, 44 insertions(+), 10 deletions(-)

diff --git a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
index 66787e99ba1b..0d8437e05f64 100644
--- a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
+++ b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
@@ -555,6 +555,7 @@ static int bpf_dummy_reg(void *kdata)
 {
 	struct bpf_testmod_ops *ops = kdata;
 
+	ops->test_1();
 	/* Some test cases (ex. struct_ops_maybe_null) may not have test_2
 	 * initialized, so we need to check for NULL.
 	 */
diff --git a/tools/testing/selftests/bpf/prog_tests/test_struct_ops_module.c b/tools/testing/selftests/bpf/prog_tests/test_struct_ops_module.c
index 8d833f0c7580..7bc80d2755f1 100644
--- a/tools/testing/selftests/bpf/prog_tests/test_struct_ops_module.c
+++ b/tools/testing/selftests/bpf/prog_tests/test_struct_ops_module.c
@@ -30,12 +30,30 @@ static void check_map_info(struct bpf_map_info *info)
 	close(fd);
 }
 
+static int attach_ops_and_check(struct struct_ops_module *skel,
+				struct bpf_map *map,
+				int expected_test_2_result)
+{
+	struct bpf_link *link;
+
+	link = bpf_map__attach_struct_ops(map);
+	ASSERT_OK_PTR(link, "attach_test_mod_1");
+	if (!link)
+		return -1;
+
+	/* test_{1,2}() would be called from bpf_dummy_reg() in bpf_testmod.c */
+	ASSERT_EQ(skel->bss->test_1_result, 0xdeadbeef, "test_1_result");
+	ASSERT_EQ(skel->bss->test_2_result, expected_test_2_result, "test_2_result");
+
+	bpf_link__destroy(link);
+	return 0;
+}
+
 static void test_struct_ops_load(void)
 {
 	DECLARE_LIBBPF_OPTS(bpf_object_open_opts, opts);
 	struct struct_ops_module *skel;
 	struct bpf_map_info info = {};
-	struct bpf_link *link;
 	int err;
 	u32 len;
 
@@ -53,15 +71,11 @@ static void test_struct_ops_load(void)
 	if (!ASSERT_OK(err, "bpf_map_get_info_by_fd"))
 		goto cleanup;
 
-	link = bpf_map__attach_struct_ops(skel->maps.testmod_1);
-	ASSERT_OK_PTR(link, "attach_test_mod_1");
-
-	/* test_2() will be called from bpf_dummy_reg() in bpf_testmod.c */
-	ASSERT_EQ(skel->bss->test_2_result, 7, "test_2_result");
-
-	bpf_link__destroy(link);
-
 	check_map_info(&info);
+	if (!attach_ops_and_check(skel, skel->maps.testmod_1, 7))
+		goto cleanup;
+	if (!attach_ops_and_check(skel, skel->maps.testmod_2, 12))
+		goto cleanup;
 
 cleanup:
 	struct_ops_module__destroy(skel);
diff --git a/tools/testing/selftests/bpf/progs/struct_ops_module.c b/tools/testing/selftests/bpf/progs/struct_ops_module.c
index b78746b3cef3..e91426dc51af 100644
--- a/tools/testing/selftests/bpf/progs/struct_ops_module.c
+++ b/tools/testing/selftests/bpf/progs/struct_ops_module.c
@@ -7,12 +7,14 @@
 
 char _license[] SEC("license") = "GPL";
 
+int test_1_result = 0;
 int test_2_result = 0;
 
 SEC("struct_ops/test_1")
 int BPF_PROG(test_1)
 {
-	return 0xdeadbeef;
+	test_1_result = 0xdeadbeef;
+	return 0;
 }
 
 SEC("struct_ops/test_2")
@@ -27,3 +29,20 @@ struct bpf_testmod_ops testmod_1 = {
 	.test_2 = (void *)test_2,
 };
 
+SEC("struct_ops/test_2")
+void BPF_PROG(test_2_v2, int a, int b)
+{
+	test_2_result = a * b;
+}
+
+struct bpf_testmod_ops___v2 {
+	int (*test_1)(void);
+	void (*test_2)(int a, int b);
+	int (*test_maybe_null)(int dummy, struct task_struct *task);
+};
+
+SEC(".struct_ops.link")
+struct bpf_testmod_ops___v2 testmod_2 = {
+	.test_1 = (void *)test_1,
+	.test_2 = (void *)test_2_v2,
+};
-- 
2.43.0