1 files changed, 17 insertions, 2 deletions

diff --git a/include/net/route.h b/include/net/route.h
index c29ef2733f2d..8c52bc6f1c90 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -30,6 +30,7 @@
 #include <net/inet_sock.h>
 #include <linux/in_route.h>
 #include <linux/rtnetlink.h>
+#include <linux/rcupdate.h>
 #include <linux/route.h>
 #include <linux/ip.h>
 #include <linux/cache.h>
@@ -157,8 +158,22 @@ static inline struct rtable *ip_route_output_gre(struct net *net, struct flowi4
         return ip_route_output_key(net, fl4);
 }
 
-extern int ip_route_input(struct sk_buff *skb, __be32 dst, __be32 src,
-                          u8 tos, struct net_device *devin);
+extern int ip_route_input_noref(struct sk_buff *skb, __be32 dst, __be32 src,
+                                u8 tos, struct net_device *devin);
+
+static inline int ip_route_input(struct sk_buff *skb, __be32 dst, __be32 src,
+                                 u8 tos, struct net_device *devin)
+{
+        int err;
+
+        rcu_read_lock();
+        err = ip_route_input_noref(skb, dst, src, tos, devin);
+        if (!err)
+                skb_dst_force(skb);
+        rcu_read_unlock();
+
+        return err;
+}
 
 extern void ipv4_update_pmtu(struct sk_buff *skb, struct net *net, u32 mtu,
                              int oif, u32 mark, u8 protocol, int flow_flags);