1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2024 Facebook */
3
4 #include "vmlinux.h"
5 #include <bpf/bpf_tracing.h>
6
7 extern void bbr_init(struct sock *sk) __ksym;
8 extern void bbr_main(struct sock *sk, u32 ack, int flag, const struct rate_sample *rs) __ksym;
9 extern u32 bbr_sndbuf_expand(struct sock *sk) __ksym;
10 extern u32 bbr_undo_cwnd(struct sock *sk) __ksym;
11 extern void bbr_cwnd_event(struct sock *sk, enum tcp_ca_event event) __ksym;
12 extern u32 bbr_ssthresh(struct sock *sk) __ksym;
13 extern u32 bbr_min_tso_segs(struct sock *sk) __ksym;
14 extern void bbr_set_state(struct sock *sk, u8 new_state) __ksym;
15
16 extern void dctcp_init(struct sock *sk) __ksym;
17 extern void dctcp_update_alpha(struct sock *sk, u32 flags) __ksym;
18 extern void dctcp_cwnd_event(struct sock *sk, enum tcp_ca_event ev) __ksym;
19 extern u32 dctcp_ssthresh(struct sock *sk) __ksym;
20 extern u32 dctcp_cwnd_undo(struct sock *sk) __ksym;
21 extern void dctcp_state(struct sock *sk, u8 new_state) __ksym;
22
23 extern void cubictcp_init(struct sock *sk) __ksym;
24 extern u32 cubictcp_recalc_ssthresh(struct sock *sk) __ksym;
25 extern void cubictcp_cong_avoid(struct sock *sk, u32 ack, u32 acked) __ksym;
26 extern void cubictcp_state(struct sock *sk, u8 new_state) __ksym;
27 extern void cubictcp_cwnd_event(struct sock *sk, enum tcp_ca_event event) __ksym;
28 extern void cubictcp_acked(struct sock *sk, const struct ack_sample *sample) __ksym;
29
30 SEC("struct_ops")
31 void BPF_PROG(init, struct sock *sk)
32 {
33 bbr_init(sk);
34 dctcp_init(sk);
35 cubictcp_init(sk);
36 }
37
38 SEC("struct_ops")
39 void BPF_PROG(in_ack_event, struct sock *sk, u32 flags)
40 {
41 dctcp_update_alpha(sk, flags);
42 }
43
44 SEC("struct_ops")
45 void BPF_PROG(cong_control, struct sock *sk, u32 ack, int flag, const struct rate_sample *rs)
46 {
47 bbr_main(sk, ack, flag, rs);
48 }
49
50 SEC("struct_ops")
51 void BPF_PROG(cong_avoid, struct sock *sk, u32 ack, u32 acked)
52 {
53 cubictcp_cong_avoid(sk, ack, acked);
54 }
55
56 SEC("struct_ops")
57 u32 BPF_PROG(sndbuf_expand, struct sock *sk)
58 {
59 return bbr_sndbuf_expand(sk);
60 }
61
62 SEC("struct_ops")
63 u32 BPF_PROG(undo_cwnd, struct sock *sk)
64 {
65 bbr_undo_cwnd(sk);
66 return dctcp_cwnd_undo(sk);
67 }
68
69 SEC("struct_ops")
70 void BPF_PROG(cwnd_event, struct sock *sk, enum tcp_ca_event event)
71 {
72 bbr_cwnd_event(sk, event);
73 dctcp_cwnd_event(sk, event);
74 cubictcp_cwnd_event(sk, event);
75 }
76
77 SEC("struct_ops")
78 u32 BPF_PROG(ssthresh, struct sock *sk)
79 {
80 bbr_ssthresh(sk);
81 dctcp_ssthresh(sk);
82 return cubictcp_recalc_ssthresh(sk);
83 }
84
85 SEC("struct_ops")
86 u32 BPF_PROG(min_tso_segs, struct sock *sk)
87 {
88 return bbr_min_tso_segs(sk);
89 }
90
91 SEC("struct_ops")
92 void BPF_PROG(set_state, struct sock *sk, u8 new_state)
93 {
94 bbr_set_state(sk, new_state);
95 dctcp_state(sk, new_state);
96 cubictcp_state(sk, new_state);
97 }
98
99 SEC("struct_ops")
100 void BPF_PROG(pkts_acked, struct sock *sk, const struct ack_sample *sample)
101 {
102 cubictcp_acked(sk, sample);
103 }
104
105 SEC(".struct_ops")
106 struct tcp_congestion_ops tcp_ca_kfunc = {
107 .init = (void *)init,
108 .in_ack_event = (void *)in_ack_event,
109 .cong_control = (void *)cong_control,
110 .cong_avoid = (void *)cong_avoid,
111 .sndbuf_expand = (void *)sndbuf_expand,
112 .undo_cwnd = (void *)undo_cwnd,
113 .cwnd_event = (void *)cwnd_event,
114 .ssthresh = (void *)ssthresh,
115 .min_tso_segs = (void *)min_tso_segs,
116 .set_state = (void *)set_state,
117 .pkts_acked = (void *)pkts_acked,
118 .name = "tcp_ca_kfunc",
119 };
120
121 char _license[] SEC("license") = "GPL";
122
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