[PATCH net-next 12/16] net: Add ipv4 route helper to set next hop

[David Ahern <dsa@cumulusnetworks.com>]

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
---
 include/net/route.h |  3 +++
 net/ipv4/route.c    | 10 ++++++++++
 2 files changed, 13 insertions(+)

diff --git a/include/net/route.h b/include/net/route.h
index b14cbec93fbd..900d50fbcfc7 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -107,6 +107,7 @@ struct rt_cache_stat {
 extern struct ip_rt_acct __percpu *ip_rt_acct;
 
 struct in_device;
+struct fib_result;
 
 int ip_rt_init(void);
 void rt_cache_flush(struct net *net);
@@ -114,6 +115,8 @@ void rt_flush_dev(struct net_device *dev);
 struct rtable *ip_route_new_rtable(struct net_device *dev,
 				   unsigned int flags, u16 type,
 				   bool nopolicy, bool noxfrm, bool do_cache);
+void ip_route_set_nexthop(struct rtable *rt, __be32 daddr,
+			  const struct fib_result *res);
 struct rtable *__ip_route_output_key(struct net *, struct flowi4 *flp);
 struct rtable *ip_route_output_flow(struct net *, struct flowi4 *flp,
 				    struct sock *sk);
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 050a3c1d89ba..47dae001a000 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1537,6 +1537,16 @@ static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr,
 	return err;
 }
 
+void ip_route_set_nexthop(struct rtable *rt, __be32 daddr,
+			  const struct fib_result *res)
+{
+	struct fib_nh_exception *fnhe;
+
+	fnhe = find_exception(&FIB_RES_NH(*res), daddr);
+
+	rt_set_nexthop(rt, daddr, res, fnhe, res->fi, res->type, 0);
+}
+EXPORT_SYMBOL(ip_route_set_nexthop);
 
 static void ip_handle_martian_source(struct net_device *dev,
 				     struct in_device *in_dev,
-- 
2.3.2 (Apple Git-55)