1/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
 2#ifndef __MPTCP_BPF_H__
 3#define __MPTCP_BPF_H__
 4
 5#include "bpf_experimental.h"
 6
 7/* list helpers from include/linux/list.h */
 8static inline int list_is_head(const struct list_head *list,
 9			       const struct list_head *head)
10{
11	return list == head;
12}
13
14#define list_entry(ptr, type, member)					\
15	container_of(ptr, type, member)
16
17#define list_first_entry(ptr, type, member)				\
18	list_entry((ptr)->next, type, member)
19
20#define list_next_entry(pos, member)					\
21	list_entry((pos)->member.next, typeof(*(pos)), member)
22
23#define list_entry_is_head(pos, head, member)				\
24	list_is_head(&pos->member, (head))
25
26/* small difference: 'can_loop' has been added in the conditions */
27#define list_for_each_entry(pos, head, member)				\
28	for (pos = list_first_entry(head, typeof(*pos), member);	\
29	     !list_entry_is_head(pos, head, member) && can_loop;	\
30	     pos = list_next_entry(pos, member))
31
32/* mptcp helpers from protocol.h */
33#define mptcp_for_each_subflow(__msk, __subflow)			\
34	list_for_each_entry(__subflow, &((__msk)->conn_list), node)
35
36static __always_inline struct sock *
37mptcp_subflow_tcp_sock(const struct mptcp_subflow_context *subflow)
38{
39	return subflow->tcp_sock;
40}
41
42#endif