| 1 | // SPDX-License-Identifier: GPL-2.0 |
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| 2 | |
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| 3 | #include "vmlinux.h" |
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| 4 | |
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| 5 | #include <bpf/bpf_helpers.h> |
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| 6 | #include <bpf/bpf_tracing.h> |
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| 7 | |
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| 8 | char _license[] SEC("license" ) = "GPL" ; |
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| 9 | |
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| 10 | int ca1_cnt = 0; |
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| 11 | int ca2_cnt = 0; |
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| 12 | |
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| 13 | static inline struct tcp_sock *tcp_sk(const struct sock *sk) |
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| 14 | { |
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| 15 | return (struct tcp_sock *)sk; |
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| 16 | } |
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| 17 | |
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| 18 | SEC("struct_ops/ca_update_1_init" ) |
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| 19 | void BPF_PROG(ca_update_1_init, struct sock *sk) |
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| 20 | { |
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| 21 | ca1_cnt++; |
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| 22 | } |
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| 23 | |
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| 24 | SEC("struct_ops/ca_update_2_init" ) |
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| 25 | void BPF_PROG(ca_update_2_init, struct sock *sk) |
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| 26 | { |
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| 27 | ca2_cnt++; |
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| 28 | } |
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| 29 | |
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| 30 | SEC("struct_ops/ca_update_cong_control" ) |
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| 31 | void BPF_PROG(ca_update_cong_control, struct sock *sk, |
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| 32 | const struct rate_sample *rs) |
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| 33 | { |
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| 34 | } |
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| 35 | |
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| 36 | SEC("struct_ops/ca_update_ssthresh" ) |
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| 37 | __u32 BPF_PROG(ca_update_ssthresh, struct sock *sk) |
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| 38 | { |
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| 39 | return tcp_sk(sk)->snd_ssthresh; |
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| 40 | } |
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| 41 | |
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| 42 | SEC("struct_ops/ca_update_undo_cwnd" ) |
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| 43 | __u32 BPF_PROG(ca_update_undo_cwnd, struct sock *sk) |
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| 44 | { |
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| 45 | return tcp_sk(sk)->snd_cwnd; |
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| 46 | } |
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| 47 | |
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| 48 | SEC(".struct_ops.link" ) |
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| 49 | struct tcp_congestion_ops ca_update_1 = { |
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| 50 | .init = (void *)ca_update_1_init, |
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| 51 | .cong_control = (void *)ca_update_cong_control, |
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| 52 | .ssthresh = (void *)ca_update_ssthresh, |
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| 53 | .undo_cwnd = (void *)ca_update_undo_cwnd, |
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| 54 | .name = "tcp_ca_update" , |
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| 55 | }; |
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| 56 | |
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| 57 | SEC(".struct_ops.link" ) |
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| 58 | struct tcp_congestion_ops ca_update_2 = { |
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| 59 | .init = (void *)ca_update_2_init, |
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| 60 | .cong_control = (void *)ca_update_cong_control, |
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| 61 | .ssthresh = (void *)ca_update_ssthresh, |
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| 62 | .undo_cwnd = (void *)ca_update_undo_cwnd, |
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| 63 | .name = "tcp_ca_update" , |
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| 64 | }; |
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| 65 | |
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| 66 | SEC(".struct_ops.link" ) |
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| 67 | struct tcp_congestion_ops ca_wrong = { |
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| 68 | .cong_control = (void *)ca_update_cong_control, |
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| 69 | .ssthresh = (void *)ca_update_ssthresh, |
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| 70 | .undo_cwnd = (void *)ca_update_undo_cwnd, |
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| 71 | .name = "tcp_ca_wrong" , |
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| 72 | }; |
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| 73 | |
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| 74 | SEC(".struct_ops" ) |
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| 75 | struct tcp_congestion_ops ca_no_link = { |
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| 76 | .cong_control = (void *)ca_update_cong_control, |
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| 77 | .ssthresh = (void *)ca_update_ssthresh, |
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| 78 | .undo_cwnd = (void *)ca_update_undo_cwnd, |
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| 79 | .name = "tcp_ca_no_link" , |
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| 80 | }; |
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| 81 | |
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