tools/testing/selftests/bpf/progs/tcp_ca_incompl_cong_ops.c

   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
   8 char _license[] SEC("license") = "GPL";
   9
  10 static inline struct tcp_sock *tcp_sk(const struct sock *sk)
  11 {
  12         return (struct tcp_sock *)sk;
  13 }
  14
  15 SEC("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
  21 SEC("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
  27 SEC(".struct_ops")
  28 struct 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 };