| 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 | static inline struct tcp_sock *tcp_sk(const struct sock *sk) |
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| 11 | { |
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| 12 | return (struct tcp_sock *)sk; |
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| 13 | } |
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| 14 | |
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| 15 | SEC("struct_ops/incompl_cong_ops_ssthresh" ) |
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| 16 | __u32 BPF_PROG(incompl_cong_ops_ssthresh, struct sock *sk) |
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| 17 | { |
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| 18 | return tcp_sk(sk)->snd_ssthresh; |
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| 19 | } |
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| 20 | |
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| 21 | SEC("struct_ops/incompl_cong_ops_undo_cwnd" ) |
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| 22 | __u32 BPF_PROG(incompl_cong_ops_undo_cwnd, struct sock *sk) |
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| 23 | { |
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| 24 | return tcp_sk(sk)->snd_cwnd; |
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| 25 | } |
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| 26 | |
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| 27 | SEC(".struct_ops" ) |
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| 28 | struct tcp_congestion_ops incompl_cong_ops = { |
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| 29 | /* Intentionally leaving out any of the required cong_avoid() and |
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| 30 | * cong_control() here. |
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| 31 | */ |
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| 32 | .ssthresh = (void *)incompl_cong_ops_ssthresh, |
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| 33 | .undo_cwnd = (void *)incompl_cong_ops_undo_cwnd, |
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| 34 | .name = "bpf_incompl_ops" , |
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| 35 | }; |
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| 36 | |
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