| // SPDX-License-Identifier: GPL-2.0 |
| |
| #include "bpf_tracing_net.h" |
| #include <bpf/bpf_core_read.h> |
| #include <bpf/bpf_helpers.h> |
| #include <bpf/bpf_tracing.h> |
| |
| char _license[] SEC("license") = "GPL"; |
| |
| SEC("struct_ops") |
| void BPF_PROG(untrusted_btf_write_init, struct sock *sk) |
| { |
| struct tcp_sock *tp; |
| int v = 1; |
| void *p; |
| |
| p = bpf_rdonly_cast(&v, 0); |
| tp = bpf_rdonly_cast(p, bpf_core_type_id_kernel(struct tcp_sock)); |
| tp->snd_cwnd = 1; |
| } |
| |
| SEC(".struct_ops") |
| struct tcp_congestion_ops untrusted_btf_write = { |
| .init = (void *)untrusted_btf_write_init, |
| .name = "bpf_ro_btf", |
| }; |
