bpf/prog_tests/reference_tracking.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 #include <test_progs.h>
0003
0004 void test_reference_tracking(void)
0005 {
0006     const char *file = "test_sk_lookup_kern.o";
0007     const char *obj_name = "ref_track";
0008     DECLARE_LIBBPF_OPTS(bpf_object_open_opts, open_opts,
0009         .object_name = obj_name,
0010         .relaxed_maps = true,
0011     );
0012     struct bpf_object *obj_iter, *obj = NULL;
0013     struct bpf_program *prog;
0014     __u32 duration = 0;
0015     int err = 0;
0016
0017     obj_iter = bpf_object__open_file(file, &open_opts);
0018     if (!ASSERT_OK_PTR(obj_iter, "obj_iter_open_file"))
0019         return;
0020
0021     if (CHECK(strcmp(bpf_object__name(obj_iter), obj_name), "obj_name",
0022           "wrong obj name '%s', expected '%s'\n",
0023           bpf_object__name(obj_iter), obj_name))
0024         goto cleanup;
0025
0026     bpf_object__for_each_program(prog, obj_iter) {
0027         struct bpf_program *p;
0028         const char *name;
0029
0030         name = bpf_program__name(prog);
0031         if (!test__start_subtest(name))
0032             continue;
0033
0034         obj = bpf_object__open_file(file, &open_opts);
0035         if (!ASSERT_OK_PTR(obj, "obj_open_file"))
0036             goto cleanup;
0037
0038         /* all programs are not loaded by default, so just set
0039          * autoload to true for the single prog under test
0040          */
0041         p = bpf_object__find_program_by_name(obj, name);
0042         bpf_program__set_autoload(p, true);
0043
0044         /* Expect verifier failure if test name has 'err' */
0045         if (strncmp(name, "err_", sizeof("err_") - 1) == 0) {
0046             libbpf_print_fn_t old_print_fn;
0047
0048             old_print_fn = libbpf_set_print(NULL);
0049             err = !bpf_object__load(obj);
0050             libbpf_set_print(old_print_fn);
0051         } else {
0052             err = bpf_object__load(obj);
0053         }
0054         ASSERT_OK(err, name);
0055
0056         bpf_object__close(obj);
0057         obj = NULL;
0058     }
0059
0060 cleanup:
0061     bpf_object__close(obj);
0062     bpf_object__close(obj_iter);
0063 }