LXR linux/tools/testing/selftests/bpf/prog_tests/reference

   1// SPDX-License-Identifier: GPL-2.0
   2#include <test_progs.h>
   3
   4static 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
  19void 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
  69cleanup:
  70        bpf_object__close(obj);
  71        bpf_object__close(obj_iter);
  72}
  73