// SPDX-License-Identifier: GPL-2.0 #include <test_progs.h> struct bss { unsigned did_run; unsigned iters; unsigned sum; }; struct rdonly_map_subtest { const char *subtest_name; const char *prog_name; unsigned exp_iters; unsigned exp_sum; }; void test_rdonly_maps(void) { const char *file = "test_rdonly_maps.bpf.o"; struct rdonly_map_subtest subtests[] = { { "skip loop", "skip_loop", 0, 0 }, { "part loop", "part_loop", 3, 2 + 3 + 4 }, { "full loop", "full_loop", 4, 2 + 3 + 4 + 5 }, }; int i, err, zero = 0, duration = 0; struct bpf_link *link = NULL; struct bpf_program *prog; struct bpf_map *bss_map; struct bpf_object *obj; struct bss bss; obj = bpf_object__open_file(file, NULL); if (!ASSERT_OK_PTR(obj, "obj_open")) return; err = bpf_object__load(obj); if (CHECK(err, "obj_load", "err %d errno %d\n", err, errno)) goto cleanup; bss_map = bpf_object__find_map_by_name(obj, ".bss"); if (CHECK(!bss_map, "find_bss_map", "failed\n")) goto cleanup; for (i = 0; i < ARRAY_SIZE(subtests); i++) { const struct rdonly_map_subtest *t = &subtests[i]; if (!test__start_subtest(t->subtest_name)) continue; prog = bpf_object__find_program_by_name(obj, t->prog_name); if (CHECK(!prog, "find_prog", "prog '%s' not found\n", t->prog_name)) goto cleanup; memset(&bss, 0, sizeof(bss)); err = bpf_map_update_elem(bpf_map__fd(bss_map), &zero, &bss, 0); if (CHECK(err, "set_bss", "failed to set bss data: %d\n", err)) goto cleanup; link = bpf_program__attach_raw_tracepoint(prog, "sys_enter"); if (!ASSERT_OK_PTR(link, "attach_prog")) goto cleanup; /* trigger probe */ usleep(1); bpf_link__destroy(link); link = NULL; err = bpf_map_lookup_elem(bpf_map__fd(bss_map), &zero, &bss); if (CHECK(err, "get_bss", "failed to get bss data: %d\n", err)) goto cleanup; if (CHECK(bss.did_run == 0, "check_run", "prog '%s' didn't run?\n", t->prog_name)) goto cleanup; if (CHECK(bss.iters != t->exp_iters, "check_iters", "prog '%s' iters: %d, expected: %d\n", t->prog_name, bss.iters, t->exp_iters)) goto cleanup; if (CHECK(bss.sum != t->exp_sum, "check_sum", "prog '%s' sum: %d, expected: %d\n", t->prog_name, bss.sum, t->exp_sum)) goto cleanup; } cleanup: bpf_link__destroy(link); bpf_object__close(obj); }