selftests/bpf: Add test for libbpf_bpf_attach_type_str

[linux-2.6-microblaze.git] / tools / testing / selftests / bpf / prog_tests / libbpf_str.c

diff --git a/tools/testing/selftests/bpf/prog_tests/libbpf_str.c b/tools/testing/selftests/bpf/prog_tests/libbpf_str.c
index f5185a4..c88df92 100644 (file)
--- a/tools/testing/selftests/bpf/prog_tests/libbpf_str.c
+++ b/tools/testing/selftests/bpf/prog_tests/libbpf_str.c
@@ -14,6 +14,51 @@ static void uppercase(char *s)
                *s = toupper(*s);
 }
 
+/*
+ * Test case to check that all bpf_attach_type variants are covered by
+ * libbpf_bpf_attach_type_str.
+ */
+static void test_libbpf_bpf_attach_type_str(void)
+{
+       struct btf *btf;
+       const struct btf_type *t;
+       const struct btf_enum *e;
+       int i, n, id;
+
+       btf = btf__parse("/sys/kernel/btf/vmlinux", NULL);
+       if (!ASSERT_OK_PTR(btf, "btf_parse"))
+               return;
+
+       /* find enum bpf_attach_type and enumerate each value */
+       id = btf__find_by_name_kind(btf, "bpf_attach_type", BTF_KIND_ENUM);
+       if (!ASSERT_GT(id, 0, "bpf_attach_type_id"))
+               goto cleanup;
+       t = btf__type_by_id(btf, id);
+       e = btf_enum(t);
+       n = btf_vlen(t);
+       for (i = 0; i < n; e++, i++) {
+               enum bpf_attach_type attach_type = (enum bpf_attach_type)e->val;
+               const char *attach_type_name;
+               const char *attach_type_str;
+               char buf[256];
+
+               if (attach_type == __MAX_BPF_ATTACH_TYPE)
+                       continue;
+
+               attach_type_name = btf__str_by_offset(btf, e->name_off);
+               attach_type_str = libbpf_bpf_attach_type_str(attach_type);
+               ASSERT_OK_PTR(attach_type_str, attach_type_name);
+
+               snprintf(buf, sizeof(buf), "BPF_%s", attach_type_str);
+               uppercase(buf);
+
+               ASSERT_STREQ(buf, attach_type_name, "exp_str_value");
+       }
+
+cleanup:
+       btf__free(btf);
+}
+
 /*
  * Test case to check that all bpf_map_type variants are covered by
  * libbpf_bpf_map_type_str.
@@ -103,6 +148,9 @@ cleanup:
  */
 void test_libbpf_str(void)
 {
+       if (test__start_subtest("bpf_attach_type_str"))
+               test_libbpf_bpf_attach_type_str();
+
        if (test__start_subtest("bpf_map_type_str"))
                test_libbpf_bpf_map_type_str();