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// SPDX-License-Identifier: GPL-2.0
#include "test_progs.h"
#include "network_helpers.h"
static __u32 duration;
static void test_global_func_args0(struct bpf_object *obj)
{
int err, i, map_fd, actual_value;
const char *map_name = "values";
map_fd = bpf_find_map(__func__, obj, map_name);
if (CHECK(map_fd < 0, "bpf_find_map", "cannot find BPF map %s: %s\n",
map_name, strerror(errno)))
return;
struct {
const char *descr;
int expected_value;
} tests[] = {
{"passing NULL pointer", 0},
{"returning value", 1},
{"reading local variable", 100 },
{"writing local variable", 101 },
{"reading global variable", 42 },
{"writing global variable", 43 },
{"writing to pointer-to-pointer", 1 },
};
for (i = 0; i < ARRAY_SIZE(tests); ++i) {
const int expected_value = tests[i].expected_value;
err = bpf_map_lookup_elem(map_fd, &i, &actual_value);
CHECK(err || actual_value != expected_value, tests[i].descr,
"err %d result %d expected %d\n", err, actual_value, expected_value);
}
}
void test_global_func_args(void)
{
const char *file = "./test_global_func_args.o";
__u32 retval;
struct bpf_object *obj;
int err, prog_fd;
err = bpf_prog_load(file, BPF_PROG_TYPE_CGROUP_SKB, &obj, &prog_fd);
if (CHECK(err, "load program", "error %d loading %s\n", err, file))
return;
err = bpf_prog_test_run(prog_fd, 1, &pkt_v4, sizeof(pkt_v4),
NULL, NULL, &retval, &duration);
CHECK(err || retval, "pass global func args run",
"err %d errno %d retval %d duration %d\n",
err, errno, retval, duration);
test_global_func_args0(obj);
bpf_object__close(obj);
}
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