blob: 8a16672b94e2384f5263e1432296cbca1236bb30 [file] [log] [blame]
Geliang Tang3bc253c2022-05-19 16:30:10 -07001// SPDX-License-Identifier: GPL-2.0
2/* Multipath TCP
3 *
4 * Copyright (c) 2020, Tessares SA.
5 * Copyright (c) 2022, SUSE.
6 *
7 * Author: Nicolas Rybowski <nicolas.rybowski@tessares.net>
8 */
9
10#define pr_fmt(fmt) "MPTCP: " fmt
11
12#include <linux/bpf.h>
13#include "protocol.h"
14
15struct mptcp_sock *bpf_mptcp_sock_from_subflow(struct sock *sk)
16{
17 if (sk && sk_fullsock(sk) && sk->sk_protocol == IPPROTO_TCP && sk_is_mptcp(sk))
18 return mptcp_sk(mptcp_subflow_ctx(sk)->conn);
19
20 return NULL;
21}
Geliang Tang0dd061a2023-08-16 09:11:56 +080022
23BTF_SET8_START(bpf_mptcp_fmodret_ids)
24BTF_ID_FLAGS(func, update_socket_protocol)
25BTF_SET8_END(bpf_mptcp_fmodret_ids)
26
27static const struct btf_kfunc_id_set bpf_mptcp_fmodret_set = {
28 .owner = THIS_MODULE,
29 .set = &bpf_mptcp_fmodret_ids,
30};
31
32static int __init bpf_mptcp_kfunc_init(void)
33{
34 return register_btf_fmodret_id_set(&bpf_mptcp_fmodret_set);
35}
36late_initcall(bpf_mptcp_kfunc_init);