1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (c) 2021 Facebook */
 3
 4#include "bpf_tracing_net.h"
 5#include <bpf/bpf_helpers.h>
 6#include <bpf/bpf_tracing.h>
 7
 8char _license[] SEC("license") = "GPL";
 9const char cubic[] = "cubic";
10
11SEC("struct_ops")
12void BPF_PROG(dctcp_nouse_release, struct sock *sk)
13{
14	bpf_setsockopt(sk, SOL_TCP, TCP_CONGESTION,
15		       (void *)cubic, sizeof(cubic));
16}
17
18SEC(".struct_ops")
19struct tcp_congestion_ops dctcp_rel = {
20	.release	= (void *)dctcp_nouse_release,
21	.name		= "bpf_dctcp_rel",
22};