tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
10static inline struct tcp_sock *tcp_sk(const struct sock *sk)
11{
12 return (struct tcp_sock *)sk;
13}
14
15SEC("struct_ops/incompl_cong_ops_ssthresh")
16__u32 BPF_PROG(incompl_cong_ops_ssthresh, struct sock *sk)
17{
18 return tcp_sk(sk)->snd_ssthresh;
19}
20
21SEC("struct_ops/incompl_cong_ops_undo_cwnd")
22__u32 BPF_PROG(incompl_cong_ops_undo_cwnd, struct sock *sk)
23{
24 return tcp_sk(sk)->snd_cwnd;
25}
26
27SEC(".struct_ops")
28struct tcp_congestion_ops incompl_cong_ops = {
29 /* Intentionally leaving out any of the required cong_avoid() and
30 * cong_control() here.
31 */
32 .ssthresh = (void *)incompl_cong_ops_ssthresh,
33 .undo_cwnd = (void *)incompl_cong_ops_undo_cwnd,
34 .name = "bpf_incompl_ops",
35};