From b5a03e1244be91b05209d4a53973393f021dd999 Mon Sep 17 00:00:00 2001
From: Sachin Saxena <sachin.saxena@freescale.com>
Date: Mon, 4 Mar 2013 10:24:19 +0000
Subject: net/ipv4: IPv4 Route Flush callback added.

Signed-off-by: Sachin Saxena <sachin.saxena@freescale.com>
Change-Id: Ia9cc025e36b67beedad57f7fff5a4846be39ad10
Reviewed-on: http://git.am.freescale.net:8181/875
Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
Tested-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>

diff --git a/include/net/route.h b/include/net/route.h
index 2ea40c1..fcbff36 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -306,6 +306,11 @@ static inline int inet_iif(const struct sk_buff *skb)
 	return skb->skb_iif;
 }
 
+#ifdef CONFIG_AS_FASTPATH
+typedef void route_flush_hook(void);
+void route_hook_fn_register(route_flush_hook *flush);
+#endif
+
 extern int sysctl_ip_default_ttl;
 
 static inline int ip4_dst_hoplimit(const struct dst_entry *dst)
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index a0fcc47..63354f5 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -199,6 +199,10 @@ const __u8 ip_tos2prio[16] = {
 };
 EXPORT_SYMBOL(ip_tos2prio);
 
+#ifdef CONFIG_AS_FASTPATH
+static route_flush_hook *route_flush_fn;
+#endif
+
 static DEFINE_PER_CPU(struct rt_cache_stat, rt_cache_stat);
 #define RT_CACHE_STAT_INC(field) __this_cpu_inc(rt_cache_stat.field)
 
@@ -445,6 +449,10 @@ static inline bool rt_is_expired(const struct rtable *rth)
 void rt_cache_flush(struct net *net)
 {
 	rt_genid_bump(net);
+#ifdef CONFIG_AS_FASTPATH
+	if (route_flush_fn)
+		route_flush_fn();
+#endif
 }
 
 static struct neighbour *ipv4_neigh_lookup(const struct dst_entry *dst,
@@ -2111,6 +2119,14 @@ out:
 }
 EXPORT_SYMBOL_GPL(__ip_route_output_key);
 
+#ifdef CONFIG_AS_FASTPATH
+void route_hook_fn_register(route_flush_hook *flush)
+{
+	route_flush_fn = flush;
+}
+EXPORT_SYMBOL(route_hook_fn_register);
+#endif
+
 static struct dst_entry *ipv4_blackhole_dst_check(struct dst_entry *dst, u32 cookie)
 {
 	return NULL;
-- 
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