mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
3bc253c2e6
This patch implements a new struct bpf_func_proto, named bpf_skc_to_mptcp_sock_proto. Define a new bpf_id BTF_SOCK_TYPE_MPTCP, and a new helper bpf_skc_to_mptcp_sock(), which invokes another new helper bpf_mptcp_sock_from_subflow() in net/mptcp/bpf.c to get struct mptcp_sock from a given subflow socket. v2: Emit BTF type, add func_id checks in verifier.c and bpf_trace.c, remove build check for CONFIG_BPF_JIT v5: Drop EXPORT_SYMBOL (Martin) Co-developed-by: Nicolas Rybowski <nicolas.rybowski@tessares.net> Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Nicolas Rybowski <nicolas.rybowski@tessares.net> Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Geliang Tang <geliang.tang@suse.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20220519233016.105670-2-mathew.j.martineau@linux.intel.com
21 lines
482 B
C
21 lines
482 B
C
// 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;
|
|
}
|