datapath/compat.h

   1 /*
   2  * Copyright (c) 2007-2015 Nicira, Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of version 2 of the GNU General Public
   6  * License as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  16  * 02110-1301, USA
  17  */
  18
  19 #ifndef COMPAT_H
  20 #define COMPAT_H 1
  21
  22 #include <linux/in.h>
  23 #include <linux/in_route.h>
  24 #include <linux/netlink.h>
  25 #include <net/ip.h>
  26 #include <net/route.h>
  27 #include <net/xfrm.h>
  28 #include <net/netfilter/ipv6/nf_defrag_ipv6.h>
  29
  30 #ifdef HAVE_GENL_MULTICAST_GROUP_WITH_ID
  31 #define GROUP_ID(grp)   ((grp)->id)
  32 #else
  33 #define GROUP_ID(grp)   0
  34 #endif
  35
  36 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
  37 #define rt_dst(rt) (rt->dst)
  38 #else
  39 #define rt_dst(rt) (rt->u.dst)
  40 #endif
  41
  42 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33)
  43 #define inet_sport(sk)  (inet_sk(sk)->sport)
  44 #else
  45 #define inet_sport(sk)  (inet_sk(sk)->inet_sport)
  46 #endif
  47
  48 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)
  49 static inline bool skb_encapsulation(struct sk_buff *skb)
  50 {
  51         return skb->encapsulation;
  52 }
  53 #else
  54 #define skb_encapsulation(skb) false
  55 #endif
  56
  57 #ifdef OVS_FRAGMENT_BACKPORT
  58 #ifdef HAVE_NF_IPV6_OPS_FRAGMENT
  59 static inline int __init ip6_output_init(void) { return 0; }
  60 static inline void ip6_output_exit(void) { }
  61 #else
  62 int __init ip6_output_init(void);
  63 void ip6_output_exit(void);
  64 #endif
  65
  66 static inline int __init compat_init(void)
  67 {
  68         int err;
  69
  70         err = ipfrag_init();
  71         if (err)
  72                 return err;
  73
  74         err = nf_ct_frag6_init();
  75         if (err)
  76                 goto error_ipfrag_exit;
  77
  78         err = ip6_output_init();
  79         if (err)
  80                 goto error_frag6_exit;
  81
  82         return 0;
  83
  84 error_frag6_exit:
  85         nf_ct_frag6_cleanup();
  86 error_ipfrag_exit:
  87         rpl_ipfrag_fini();
  88         return err;
  89 }
  90 static inline void compat_exit(void)
  91 {
  92         ip6_output_exit();
  93         nf_ct_frag6_cleanup();
  94         rpl_ipfrag_fini();
  95 }
  96 #else
  97 static inline int __init compat_init(void) { return 0; }
  98 static inline void compat_exit(void) { }
  99 #endif
 100
 101 #endif /* compat.h */