net: Pass neighbours and dest address into NETEVENT_REDIRECT events.

Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 19 insertions, 15 deletions

diff --git a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_offload.c b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_offload.c
index 55cf72af69ce..633c6029e53c 100644
--- a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_offload.c
+++ b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_offload.c
@@ -62,7 +62,8 @@ static const unsigned int MAX_ATIDS = 64 * 1024;
 static const unsigned int ATID_BASE = 0x10000;
 
 static void cxgb_neigh_update(struct neighbour *neigh);
-static void cxgb_redirect(struct dst_entry *old, struct dst_entry *new);
+static void cxgb_redirect(struct dst_entry *old, struct neighbour *old_neigh,
+                          struct dst_entry *new, struct neighbour *new_neigh);
 
 static inline int offload_activated(struct t3cdev *tdev)
 {
@@ -968,8 +969,9 @@ static int nb_callback(struct notifier_block *self, unsigned long event,
         }
         case (NETEVENT_REDIRECT):{
                 struct netevent_redirect *nr = ctx;
-                cxgb_redirect(nr->old, nr->new);
-                cxgb_neigh_update(dst_get_neighbour_noref(nr->new));
+                cxgb_redirect(nr->old, nr->old_neigh,
+                              nr->new, nr->new_neigh);
+                cxgb_neigh_update(nr->new_neigh);
                 break;
         }
         default:
@@ -1107,10 +1109,10 @@ static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e)
         tdev->send(tdev, skb);
 }
 
-static void cxgb_redirect(struct dst_entry *old, struct dst_entry *new)
+static void cxgb_redirect(struct dst_entry *old, struct neighbour *old_neigh,
+                          struct dst_entry *new, struct neighbour *new_neigh)
 {
         struct net_device *olddev, *newdev;
-        struct neighbour *n;
         struct tid_info *ti;
         struct t3cdev *tdev;
         u32 tid;
@@ -1118,15 +1120,8 @@ static void cxgb_redirect(struct dst_entry *old, struct dst_entry *new)
         struct l2t_entry *e;
         struct t3c_tid_entry *te;
 
-        n = dst_get_neighbour_noref(old);
-        if (!n)
-                return;
-        olddev = n->dev;
-
-        n = dst_get_neighbour_noref(new);
-        if (!n)
-                return;
-        newdev = n->dev;
+        olddev = old_neigh->dev;
+        newdev = new_neigh->dev;
 
         if (!is_offloading(olddev))
                 return;
diff --git a/include/net/netevent.h b/include/net/netevent.h
index 086f8a5b59dc..3ce4988c9c08 100644
--- a/include/net/netevent.h
+++ b/include/net/netevent.h
@@ -12,10 +12,14 @@
  */
 
 struct dst_entry;
+struct neighbour;
 
 struct netevent_redirect {
         struct dst_entry *old;
+        struct neighbour *old_neigh;
         struct dst_entry *new;
+        struct neighbour *new_neigh;
+        const void *daddr;
 };
 
 enum netevent_notif_type {
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 4b581c675bb2..34b29881e22d 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1687,6 +1687,7 @@ void rt6_redirect(const struct in6_addr *dest, const struct in6_addr *src,
         struct rt6_info *rt, *nrt = NULL;
         struct netevent_redirect netevent;
         struct net *net = dev_net(neigh->dev);
+        struct neighbour *old_neigh;
 
         rt = ip6_route_redirect(dest, src, saddr, neigh->dev);
 
@@ -1714,7 +1715,8 @@ void rt6_redirect(const struct in6_addr *dest, const struct in6_addr *src,
         dst_confirm(&rt->dst);
 
         /* Duplicate redirect: silently ignore. */
-        if (neigh == dst_get_neighbour_noref_raw(&rt->dst))
+        old_neigh = dst_get_neighbour_noref_raw(&rt->dst);
+        if (neigh == old_neigh)
                 goto out;
 
         nrt = ip6_rt_copy(rt, dest);
@@ -1732,7 +1734,10 @@ void rt6_redirect(const struct in6_addr *dest, const struct in6_addr *src,
                 goto out;
 
         netevent.old = &rt->dst;
+        netevent.old_neigh = old_neigh;
         netevent.new = &nrt->dst;
+        netevent.new_neigh = neigh;
+        netevent.daddr = dest;
         call_netevent_notifiers(NETEVENT_REDIRECT, &netevent);
 
         if (rt->rt6i_flags & RTF_CACHE) {