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

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <test_progs.h>
   3
   4 void test_reference_tracking(void)
   5 {
   6         const char *file = "test_sk_lookup_kern.bpf.o";
   7         const char *obj_name = "ref_track";
   8         DECLARE_LIBBPF_OPTS(bpf_object_open_opts, open_opts,
   9                 .object_name = obj_name,
  10                 .relaxed_maps = true,
  11         );
  12         struct bpf_object *obj_iter, *obj = NULL;
  13         struct bpf_program *prog;
  14         __u32 duration = 0;
  15         int err = 0;
  16
  17         obj_iter = bpf_object__open_file(file, &open_opts);
  18         if (!ASSERT_OK_PTR(obj_iter, "obj_iter_open_file"))
  19                 return;
  20
  21         if (CHECK(strcmp(bpf_object__name(obj_iter), obj_name), "obj_name",
  22                   "wrong obj name '%s', expected '%s'\n",
  23                   bpf_object__name(obj_iter), obj_name))
  24                 goto cleanup;
  25
  26         bpf_object__for_each_program(prog, obj_iter) {
  27                 struct bpf_program *p;
  28                 const char *name;
  29
  30                 name = bpf_program__name(prog);
  31                 if (!test__start_subtest(name))
  32                         continue;
  33
  34                 obj = bpf_object__open_file(file, &open_opts);
  35                 if (!ASSERT_OK_PTR(obj, "obj_open_file"))
  36                         goto cleanup;
  37
  38                 /* all programs are not loaded by default, so just set
  39                  * autoload to true for the single prog under test
  40                  */
  41                 p = bpf_object__find_program_by_name(obj, name);
  42                 bpf_program__set_autoload(p, true);
  43
  44                 /* Expect verifier failure if test name has 'err' */
  45                 if (strncmp(name, "err_", sizeof("err_") - 1) == 0) {
  46                         libbpf_print_fn_t old_print_fn;
  47
  48                         old_print_fn = libbpf_set_print(NULL);
  49                         err = !bpf_object__load(obj);
  50                         libbpf_set_print(old_print_fn);
  51                 } else {
  52                         err = bpf_object__load(obj);
  53                 }
  54                 ASSERT_OK(err, name);
  55
  56                 bpf_object__close(obj);
  57                 obj = NULL;
  58         }
  59
  60 cleanup:
  61         bpf_object__close(obj);
  62         bpf_object__close(obj_iter);
  63 }