1 // 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 15 struct 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 } 22