datapath: Add support for kernel 3.14.

[sliver-openvswitch.git] / datapath / compat.h

diff --git a/datapath/compat.h b/datapath/compat.h
index 71fa06c..f38d38c 100644 (file)
--- a/datapath/compat.h
+++ b/datapath/compat.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2007-2012 Nicira Networks.
+ * Copyright (c) 2007-2012 Nicira, Inc.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of version 2 of the GNU General Public
@@ -19,66 +19,60 @@
 #ifndef COMPAT_H
 #define COMPAT_H 1
 
+#include <linux/in.h>
+#include <linux/in_route.h>
 #include <linux/netlink.h>
+#include <net/route.h>
+#include <net/xfrm.h>
 
-#ifndef HAVE_NLA_NUL_STRING
-static inline int CHECK_NUL_STRING(struct nlattr *attr, int maxlen)
-{
-       char *s;
-       int len;
-       if (!attr)
-               return 0;
-
-       len = nla_len(attr);
-       if (len >= maxlen)
-               return -EINVAL;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,13,0)
+#define GROUP_ID(grp)  0
+#else
+#define GROUP_ID(grp)  ((grp)->id)
+#endif
 
-       s = nla_data(attr);
-       if (s[len - 1] != '\0')
-               return -EINVAL;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
+#define rt_dst(rt) (rt->dst)
+#else
+#define rt_dst(rt) (rt->u.dst)
+#endif
 
-       return 0;
-}
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33)
+#define inet_sport(sk) (inet_sk(sk)->sport)
 #else
-static inline int CHECK_NUL_STRING(struct nlattr *attr, int maxlen)
-{
-       return 0;
-}
-#endif  /* !HAVE_NLA_NUL_STRING */
+#define inet_sport(sk) (inet_sk(sk)->inet_sport)
+#endif
 
-static inline void skb_clear_rxhash(struct sk_buff *skb)
+static inline struct rtable *find_route(struct net *net,
+                                       __be32 *saddr, __be32 daddr,
+                                       u8 ipproto, u8 tos, u32 skb_mark)
 {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)
-       skb->rxhash = 0;
-#endif
-}
+       struct rtable *rt;
+       /* Tunnel configuration keeps DSCP part of TOS bits, But Linux
+        * router expect RT_TOS bits only. */
 
-/*
- * Enforces, mutual exclusion with the Linux bridge module, by declaring and
- * exporting br_should_route_hook.  Because the bridge module also exports the
- * same symbol, the module loader will refuse to load both modules at the same
- * time (e.g. "bridge: exports duplicate symbol br_should_route_hook (owned by
- * openvswitch)").
- *
- * Before Linux 2.6.36, Open vSwitch cannot safely coexist with the Linux
- * bridge module, so openvswitch uses this macro in those versions.  In
- * Linux 2.6.36 and later, Open vSwitch can coexist with the bridge module,
- * but it makes no sense to load both bridge and brcompat, so brcompat uses
- * this macro in those versions.
- *
- * The use of "typeof" here avoids the need to track changes in the type of
- * br_should_route_hook over various kernel versions.
- */
-#define BRIDGE_MUTUAL_EXCLUSION                                        \
-       typeof(br_should_route_hook) br_should_route_hook;      \
-       EXPORT_SYMBOL(br_should_route_hook)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39)
+       struct flowi fl = { .nl_u = { .ip4_u = {
+                                       .daddr = daddr,
+                                       .saddr = *saddr,
+                                       .tos   = RT_TOS(tos) } },
+                                       .mark = skb_mark,
+                                       .proto = ipproto };
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,32)
-#define GENL_SOCK(net) (genl_sock)
-#define SET_NETNSOK
+       if (unlikely(ip_route_output_key(net, &rt, &fl)))
+               return ERR_PTR(-EADDRNOTAVAIL);
+       *saddr = fl.nl_u.ip4_u.saddr;
+       return rt;
 #else
-#define GENL_SOCK(net) ((net)->genl_sock)
-#define SET_NETNSOK    .netnsok = true,
-#endif
+       struct flowi4 fl = { .daddr = daddr,
+                            .saddr = *saddr,
+                            .flowi4_tos = RT_TOS(tos),
+                            .flowi4_mark = skb_mark,
+                            .flowi4_proto = ipproto };
 
+       rt = ip_route_output_key(net, &fl);
+       *saddr = fl.saddr;
+       return rt;
+#endif
+}
 #endif /* compat.h */