63 lines · c
1// SPDX-License-Identifier: GPL-2.02#include "test_progs.h"3#include "network_helpers.h"4 5static __u32 duration;6 7static void test_global_func_args0(struct bpf_object *obj)8{9 int err, i, map_fd, actual_value;10 const char *map_name = "values";11 12 map_fd = bpf_find_map(__func__, obj, map_name);13 if (CHECK(map_fd < 0, "bpf_find_map", "cannot find BPF map %s: %s\n",14 map_name, strerror(errno)))15 return;16 17 struct {18 const char *descr;19 int expected_value;20 } tests[] = {21 {"passing NULL pointer", 0},22 {"returning value", 1},23 {"reading local variable", 100 },24 {"writing local variable", 101 },25 {"reading global variable", 42 },26 {"writing global variable", 43 },27 {"writing to pointer-to-pointer", 1 },28 };29 30 for (i = 0; i < ARRAY_SIZE(tests); ++i) {31 const int expected_value = tests[i].expected_value;32 33 err = bpf_map_lookup_elem(map_fd, &i, &actual_value);34 35 CHECK(err || actual_value != expected_value, tests[i].descr,36 "err %d result %d expected %d\n", err, actual_value, expected_value);37 }38}39 40void test_global_func_args(void)41{42 const char *file = "./test_global_func_args.bpf.o";43 struct bpf_object *obj;44 int err, prog_fd;45 LIBBPF_OPTS(bpf_test_run_opts, topts,46 .data_in = &pkt_v4,47 .data_size_in = sizeof(pkt_v4),48 .repeat = 1,49 );50 51 err = bpf_prog_test_load(file, BPF_PROG_TYPE_CGROUP_SKB, &obj, &prog_fd);52 if (CHECK(err, "load program", "error %d loading %s\n", err, file))53 return;54 55 err = bpf_prog_test_run_opts(prog_fd, &topts);56 ASSERT_OK(err, "test_run");57 ASSERT_OK(topts.retval, "test_run retval");58 59 test_global_func_args0(obj);60 61 bpf_object__close(obj);62}63