tools/testing/selftests/bpf/prog_tests/reference_tracking.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <test_progs.h>
   3
   4 static void toggle_object_autoload_progs(const struct bpf_object *obj,
   5                                          const char *name_load)
   6 {
   7         struct bpf_program *prog;
   8
   9         bpf_object__for_each_program(prog, obj) {
  10                 const char *name = bpf_program__name(prog);
  11
  12                 if (!strcmp(name_load, name))
  13                         bpf_program__set_autoload(prog, true);
  14                 else
  15                         bpf_program__set_autoload(prog, false);
  16         }
  17 }
  18
  19 void test_reference_tracking(void)
  20 {
  21         const char *file = "test_sk_lookup_kern.o";
  22         const char *obj_name = "ref_track";
  23         DECLARE_LIBBPF_OPTS(bpf_object_open_opts, open_opts,
  24                 .object_name = obj_name,
  25                 .relaxed_maps = true,
  26         );
  27         struct bpf_object *obj_iter, *obj = NULL;
  28         struct bpf_program *prog;
  29         __u32 duration = 0;
  30         int err = 0;
  31
  32         obj_iter = bpf_object__open_file(file, &open_opts);
  33         if (!ASSERT_OK_PTR(obj_iter, "obj_iter_open_file"))
  34                 return;
  35
  36         if (CHECK(strcmp(bpf_object__name(obj_iter), obj_name), "obj_name",
  37                   "wrong obj name '%s', expected '%s'\n",
  38                   bpf_object__name(obj_iter), obj_name))
  39                 goto cleanup;
  40
  41         bpf_object__for_each_program(prog, obj_iter) {
  42                 const char *name;
  43
  44                 name = bpf_program__name(prog);
  45                 if (!test__start_subtest(name))
  46                         continue;
  47
  48                 obj = bpf_object__open_file(file, &open_opts);
  49                 if (!ASSERT_OK_PTR(obj, "obj_open_file"))
  50                         goto cleanup;
  51
  52                 toggle_object_autoload_progs(obj, name);
  53                 /* Expect verifier failure if test name has 'err' */
  54                 if (strncmp(name, "err_", sizeof("err_") - 1) == 0) {
  55                         libbpf_print_fn_t old_print_fn;
  56
  57                         old_print_fn = libbpf_set_print(NULL);
  58                         err = !bpf_object__load(obj);
  59                         libbpf_set_print(old_print_fn);
  60                 } else {
  61                         err = bpf_object__load(obj);
  62                 }
  63                 ASSERT_OK(err, name);
  64
  65                 bpf_object__close(obj);
  66                 obj = NULL;
  67         }
  68
  69 cleanup:
  70         bpf_object__close(obj);
  71         bpf_object__close(obj_iter);
  72 }