tools/testing/selftests/bpf/progs/mptcp_bpf.h

   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 */
   8 static 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
  36 static __always_inline struct sock *
  37 mptcp_subflow_tcp_sock(const struct mptcp_subflow_context *subflow)
  38 {
  39         return subflow->tcp_sock;
  40 }
  41
  42 #endif