At the moment libbpf_probe_prog_types test iterates over all available
BPF_PROG_TYPE regardless of kernel configuration which can exclude some
of those. Unfortunately there is no direct way to tell which types are
available, but we can look at struct bpf_ctx_onvert to tell which ones
are available.
Signed-off-by: Artem Savkov <asavkov@xxxxxxxxxx>
---
.../selftests/bpf/prog_tests/libbpf_probes.c | 33 +++++++++++++++++--
1 file changed, 31 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/libbpf_probes.c b/tools/testing/selftests/bpf/prog_tests/libbpf_probes.c
index 9f766ddd946ab..753ddf79cf5e0 100644
--- a/tools/testing/selftests/bpf/prog_tests/libbpf_probes.c
+++ b/tools/testing/selftests/bpf/prog_tests/libbpf_probes.c
@@ -4,12 +4,29 @@
#include <test_progs.h>
#include <bpf/btf.h>
+static int find_type_in_ctx_convert(struct btf *btf,
+ const char *prog_type_name,
+ const struct btf_type *t)
+{
+ const struct btf_member *m;
+ size_t cmplen = strlen(prog_type_name);
+ int i, n;
+
+ for (m = btf_members(t), i = 0, n = btf_vlen(t); i < n; m++, i++) {
+ const char *member_name = btf__str_by_offset(btf, m->name_off);
+
+ if (!strncmp(prog_type_name, member_name, cmplen))
+ return 1;
+ }
+ return 0;
+}
+
void test_libbpf_probe_prog_types(void)
{
struct btf *btf;
- const struct btf_type *t;
+ const struct btf_type *t, *context_convert_t;
const struct btf_enum *e;
- int i, n, id;
+ int i, n, id, context_convert_id;
btf = btf__parse("/sys/kernel/btf/vmlinux", NULL);
if (!ASSERT_OK_PTR(btf, "btf_parse"))
@@ -23,6 +40,14 @@ void test_libbpf_probe_prog_types(void)
if (!ASSERT_OK_PTR(t, "bpf_prog_type_enum"))
goto cleanup;
+ context_convert_id = btf__find_by_name_kind(btf, "bpf_ctx_convert",
+ BTF_KIND_STRUCT);
+ if (!ASSERT_GT(context_convert_id, 0, "bpf_ctx_convert_id"))
+ goto cleanup;
+ context_convert_t = btf__type_by_id(btf, context_convert_id);
+ if (!ASSERT_OK_PTR(t, "bpf_ctx_convert_type"))
+ goto cleanup;
+
for (e = btf_enum(t), i = 0, n = btf_vlen(t); i < n; e++, i++) {
const char *prog_type_name = btf__str_by_offset(btf, e->name_off);
enum bpf_prog_type prog_type = (enum bpf_prog_type)e->val;
@@ -31,6 +56,10 @@ void test_libbpf_probe_prog_types(void)
if (prog_type == BPF_PROG_TYPE_UNSPEC)
continue;
+ if (!find_type_in_ctx_convert(btf, prog_type_name,
+ context_convert_t))
+ continue;
+
if (!test__start_subtest(prog_type_name))
continue;
--
2.37.3
