// SPDX-License-Identifier: GPL-2.0 /* Multipath TCP * * Copyright (c) 2020, Tessares SA. * Copyright (c) 2022, SUSE. * * Author: Nicolas Rybowski <nicolas.rybowski@tessares.net> */ #define pr_fmt(fmt) "MPTCP: " fmt #include <linux/bpf.h> #include "protocol.h" struct mptcp_sock *bpf_mptcp_sock_from_subflow(struct sock *sk) { if (sk && sk_fullsock(sk) && sk->sk_protocol == IPPROTO_TCP && sk_is_mptcp(sk)) return mptcp_sk(mptcp_subflow_ctx(sk)->conn); return NULL; }