tools/testing/selftests/bpf/prog_tests/skb_helpers.c

// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include <network_helpers.h>

void test_skb_helpers(void)
{
	struct __sk_buff skb = {
		.wire_len = 100,
		.gso_segs = 8,
		.gso_size = 10,
	};
	LIBBPF_OPTS(bpf_test_run_opts, topts,
		.data_in = &pkt_v4,
		.data_size_in = sizeof(pkt_v4),
		.ctx_in = &skb,
		.ctx_size_in = sizeof(skb),
		.ctx_out = &skb,
		.ctx_size_out = sizeof(skb),
	);
	struct bpf_object *obj;
	int err, prog_fd;

	err = bpf_prog_test_load("./test_skb_helpers.bpf.o",
				 BPF_PROG_TYPE_SCHED_CLS, &obj, &prog_fd);
	if (!ASSERT_OK(err, "load"))
		return;
	err = bpf_prog_test_run_opts(prog_fd, &topts);
	ASSERT_OK(err, "test_run");
	bpf_object__close(obj);
}