ipv4: Make inet_sock.h independent of route.h

inet_iif() in inet_sock.h requires route.h. Since users of inet_iif()
usually require other route.h functionality anyway this patch moves
inet_iif() to route.h.
Signed-off-by: NKOVACS Krisztian <hidden@sch.bme.hu>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/net/inet_sock.h

@@ -24,7 +24,6 @@
 #include <net/flow.h>
 #include <net/sock.h>
 #include <net/request_sock.h>
-#include <net/route.h>
 #include <net/netns/hash.h>
 
 /** struct ip_options - IP Options
@@ -195,12 +194,6 @@ static inline int inet_sk_ehashfn(const struct sock *sk)
 	return inet_ehashfn(net, laddr, lport, faddr, fport);
 }
 
-
-static inline int inet_iif(const struct sk_buff *skb)
-{
-	return skb->rtable->rt_iif;
-}
-
 static inline struct request_sock *inet_reqsk_alloc(struct request_sock_ops *ops)
 {
 	struct request_sock *req = reqsk_alloc(ops);

include/net/ip_vs.h

@@ -22,6 +22,7 @@
 
 #include <net/checksum.h>
 #include <linux/netfilter.h>		/* for union nf_inet_addr */
+#include <linux/ip.h>
 #include <linux/ipv6.h>			/* for struct ipv6hdr */
 #include <net/ipv6.h>			/* for ipv6_addr_copy */
 

include/net/route.h

@@ -204,4 +204,9 @@ static inline struct inet_peer *rt_get_peer(struct rtable *rt)
 	return rt->peer;
 }
 
+static inline int inet_iif(const struct sk_buff *skb)
+{
+	return skb->rtable->rt_iif;
+}
+
 #endif	/* _ROUTE_H */

net/ipv4/netfilter/nf_nat_helper.c

@@ -16,6 +16,7 @@
 #include <linux/udp.h>
 #include <net/checksum.h>
 #include <net/tcp.h>
+#include <net/route.h>
 
 #include <linux/netfilter_ipv4.h>
 #include <net/netfilter/nf_conntrack.h>

net/ipv6/af_inet6.c

@@ -50,6 +50,7 @@
 #include <net/ipip.h>
 #include <net/protocol.h>
 #include <net/inet_common.h>
+#include <net/route.h>
 #include <net/transp_v6.h>
 #include <net/ip6_route.h>
 #include <net/addrconf.h>