@@ -14,11 +14,53 @@ static void uppercase(char *s)
*s = toupper(*s);
}
+/**
+ * Test case to check that all bpf_map_type variants are covered by
+ * libbpf_bpf_map_type_str.
+ */
+static void test_libbpf_bpf_map_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_map_type and enumerate each value */
+ id = btf__find_by_name_kind(btf, "bpf_map_type", BTF_KIND_ENUM);
+ if (!ASSERT_GT(id, 0, "bpf_map_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_map_type map_type = (enum bpf_map_type)e->val;
+ const char *map_type_name;
+ const char *map_type_str;
+ char buf[256];
+
+ map_type_name = btf__str_by_offset(btf, e->name_off);
+ map_type_str = libbpf_bpf_map_type_str(map_type);
+ ASSERT_OK_PTR(map_type_str, map_type_name);
+
+ snprintf(buf, sizeof(buf), "BPF_MAP_TYPE_%s", map_type_str);
+ uppercase(buf);
+
+ ASSERT_STREQ(buf, map_type_name, "exp_str_value");
+ }
+
+cleanup:
+ btf__free(btf);
+}
+
/**
* Test case to check that all bpf_prog_type variants are covered by
* libbpf_bpf_prog_type_str.
*/
-void test_libbpf_bpf_prog_type_str(void)
+static void test_libbpf_bpf_prog_type_str(void)
{
struct btf *btf;
const struct btf_type *t;
@@ -55,3 +97,15 @@ void test_libbpf_bpf_prog_type_str(void)
cleanup:
btf__free(btf);
}
+
+/**
+ * Run all libbpf str conversion tests.
+ */
+void test_libbpf_str(void)
+{
+ if (test__start_subtest("bpf_map_type_str"))
+ test_libbpf_bpf_map_type_str();
+
+ if (test__start_subtest("bpf_prog_type_str"))
+ test_libbpf_bpf_prog_type_str();
+}
This change adds a test for libbpf_bpf_map_type_str. The test retrieves all variants of the bpf_map_type enumeration using BTF and makes sure that the function under test works as expected for them. Signed-off-by: Daniel Müller <deso@posteo.net> --- .../selftests/bpf/prog_tests/libbpf_str.c | 56 ++++++++++++++++++- 1 file changed, 55 insertions(+), 1 deletion(-)