1 files changed, 53 insertions, 1 deletions

diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h
index 89e6c72..66bc520 100644
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -6,11 +6,13 @@
 #include <linux/types.h>
 #include <linux/skbuff.h>
 #include <linux/net.h>
+#include <linux/netdevice.h>
 #include <linux/if.h>
 #include <linux/in.h>
 #include <linux/in6.h>
 #include <linux/wait.h>
 #include <linux/list.h>
+#include <net/net_namespace.h>
 #endif
 #include <linux/compiler.h>
 
@@ -76,7 +78,6 @@ extern void netfilter_init(void);
 #define NF_MAX_HOOKS 8
 
 struct sk_buff;
-struct net_device;
 
 typedef unsigned int nf_hookfn(unsigned int hooknum,
 			       struct sk_buff *skb,
@@ -320,5 +321,56 @@ extern void (*nf_ct_destroy)(struct nf_conntrack *);
 static inline void nf_ct_attach(struct sk_buff *new, struct sk_buff *skb) {}
 #endif
 
+static inline struct net *nf_pre_routing_net(const struct net_device *in,
+					     const struct net_device *out)
+{
+#ifdef CONFIG_NET_NS
+	return in->nd_net;
+#else
+	return &init_net;
+#endif
+}
+
+static inline struct net *nf_local_in_net(const struct net_device *in,
+					  const struct net_device *out)
+{
+#ifdef CONFIG_NET_NS
+	return in->nd_net;
+#else
+	return &init_net;
+#endif
+}
+
+static inline struct net *nf_forward_net(const struct net_device *in,
+					 const struct net_device *out)
+{
+#ifdef CONFIG_NET_NS
+	BUG_ON(in->nd_net != out->nd_net);
+	return in->nd_net;
+#else
+	return &init_net;
+#endif
+}
+
+static inline struct net *nf_local_out_net(const struct net_device *in,
+					   const struct net_device *out)
+{
+#ifdef CONFIG_NET_NS
+	return out->nd_net;
+#else
+	return &init_net;
+#endif
+}
+
+static inline struct net *nf_post_routing_net(const struct net_device *in,
+					      const struct net_device *out)
+{
+#ifdef CONFIG_NET_NS
+	return out->nd_net;
+#else
+	return &init_net;
+#endif
+}
+
 #endif /*__KERNEL__*/
 #endif /*__LINUX_NETFILTER_H*/