3 files changed, 10 insertions, 0 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index e48ee2eaaa3e..779b23595596 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3284,6 +3284,7 @@ void __dev_notify_flags(struct net_device *, unsigned int old_flags,
 int dev_change_name(struct net_device *, const char *);
 int dev_set_alias(struct net_device *, const char *, size_t);
 int dev_change_net_namespace(struct net_device *, struct net *, const char *);
+int __dev_set_mtu(struct net_device *, int);
 int dev_set_mtu(struct net_device *, int);
 void dev_set_group(struct net_device *, int);
 int dev_set_mac_address(struct net_device *, struct sockaddr *);
diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h
index 0fbf73dd531a..199056933dcb 100644
--- a/include/net/ip6_route.h
+++ b/include/net/ip6_route.h
@@ -22,6 +22,7 @@ struct route_info {
 #include <net/flow.h>
 #include <net/ip6_fib.h>
 #include <net/sock.h>
+#include <net/lwtunnel.h>
 #include <linux/ip.h>
 #include <linux/ipv6.h>
 #include <linux/route.h>
@@ -232,4 +233,11 @@ static inline struct in6_addr *rt6_nexthop(struct rt6_info *rt,
                 return daddr;
 }
 
+static inline bool rt6_duplicate_nexthop(struct rt6_info *a, struct rt6_info *b)
+{
+        return a->dst.dev == b->dst.dev &&
+               a->rt6i_idev == b->rt6i_idev &&
+               ipv6_addr_equal(&a->rt6i_gateway, &b->rt6i_gateway) &&
+               !lwtunnel_cmp_encap(a->dst.lwtstate, b->dst.lwtstate);
+}
 #endif
diff --git a/include/net/sock.h b/include/net/sock.h
index 48e4d5c38f85..8c85791fc196 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1697,6 +1697,7 @@ static inline void sock_orphan(struct sock *sk)
 
 static inline void sock_graft(struct sock *sk, struct socket *parent)
 {
+        WARN_ON(parent->sk);
         write_lock_bh(&sk->sk_callback_lock);
         sk->sk_wq = parent->wq;
         parent->sk = sk;