[NET]: Core net changes to generate netevents

Generate netevents for:
- neighbour changes
- routing redirects
- pmtu changes

Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 87c39c9..4b16371 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -53,6 +53,7 @@
 #include <linux/rtnetlink.h>
 #include <net/dst.h>
 #include <net/xfrm.h>
+#include <net/netevent.h>
 
 #include <asm/uaccess.h>
 
@@ -742,6 +743,7 @@
 			dst->metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG;
 		}
 		dst->metrics[RTAX_MTU-1] = mtu;
+		call_netevent_notifiers(NETEVENT_PMTU_UPDATE, dst);
 	}
 }
 
@@ -1155,6 +1157,7 @@
 	struct rt6_info *rt, *nrt = NULL;
 	int strict;
 	struct fib6_node *fn;
+	struct netevent_redirect netevent;
 
 	/*
 	 * Get the "current" route for this destination and
@@ -1252,6 +1255,10 @@
 	if (ip6_ins_rt(nrt, NULL, NULL, NULL))
 		goto out;
 
+	netevent.old = &rt->u.dst;
+	netevent.new = &nrt->u.dst;
+	call_netevent_notifiers(NETEVENT_REDIRECT, &netevent);
+
 	if (rt->rt6i_flags&RTF_CACHE) {
 		ip6_del_rt(rt, NULL, NULL, NULL);
 		return;