1// SPDX-License-Identifier: GPL-2.0
2
3#include "vmlinux.h"
4
5#include <bpf/bpf_helpers.h>
6#include <bpf/bpf_tracing.h>
7
8char _license[] SEC("license") = "GPL";
9
10SEC("struct_ops/unsupp_cong_op_get_info")
11size_t BPF_PROG(unsupp_cong_op_get_info, struct sock *sk, u32 ext, int *attr,
12 union tcp_cc_info *info)
13{
14 return 0;
15}
16
17SEC(".struct_ops")
18struct tcp_congestion_ops unsupp_cong_op = {
19 .get_info = (void *)unsupp_cong_op_get_info,
20 .name = "bpf_unsupp_op",
21};
22

source code of linux/tools/testing/selftests/bpf/progs/tcp_ca_unsupp_cong_op.c