int main()

in bpf/map_perf_test_user.c [425:504]
63 lines of code
17 McCabe index (conditional complexity)

int main(int argc, char **argv)
{
	int nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
	struct bpf_link *links[8];
	struct bpf_program *prog;
	struct bpf_object *obj;
	struct bpf_map *map;
	char filename[256];
	int i = 0;

	if (argc > 1)
		test_flags = atoi(argv[1]) ? : test_flags;

	if (argc > 2)
		nr_cpus = atoi(argv[2]) ? : nr_cpus;

	if (argc > 3)
		num_map_entries = atoi(argv[3]);

	if (argc > 4)
		max_cnt = atoi(argv[4]);

	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
	obj = bpf_object__open_file(filename, NULL);
	if (libbpf_get_error(obj)) {
		fprintf(stderr, "ERROR: opening BPF object file failed\n");
		return 0;
	}

	map = bpf_object__find_map_by_name(obj, "inner_lru_hash_map");
	if (libbpf_get_error(map)) {
		fprintf(stderr, "ERROR: finding a map in obj file failed\n");
		goto cleanup;
	}

	inner_lru_hash_size = bpf_map__max_entries(map);
	if (!inner_lru_hash_size) {
		fprintf(stderr, "ERROR: failed to get map attribute\n");
		goto cleanup;
	}

	/* resize BPF map prior to loading */
	if (num_map_entries > 0)
		fixup_map(obj);

	/* load BPF program */
	if (bpf_object__load(obj)) {
		fprintf(stderr, "ERROR: loading BPF object file failed\n");
		goto cleanup;
	}

	map_fd[0] = bpf_object__find_map_fd_by_name(obj, "array_of_lru_hashs");
	map_fd[1] = bpf_object__find_map_fd_by_name(obj, "hash_map_alloc");
	map_fd[2] = bpf_object__find_map_fd_by_name(obj, "lru_hash_lookup_map");
	if (map_fd[0] < 0 || map_fd[1] < 0 || map_fd[2] < 0) {
		fprintf(stderr, "ERROR: finding a map in obj file failed\n");
		goto cleanup;
	}

	bpf_object__for_each_program(prog, obj) {
		links[i] = bpf_program__attach(prog);
		if (libbpf_get_error(links[i])) {
			fprintf(stderr, "ERROR: bpf_program__attach failed\n");
			links[i] = NULL;
			goto cleanup;
		}
		i++;
	}

	fill_lpm_trie();

	run_perf_test(nr_cpus);

cleanup:
	for (i--; i >= 0; i--)
		bpf_link__destroy(links[i]);

	bpf_object__close(obj);
	return 0;
}