inetpeer: Move ICMP rate limiting state into inet_peer entries.

Like metrics, the ICMP rate limiting bits are cached state about
a destination.  So move it into the inet_peer entries.

If an inet_peer cannot be bound (the reason is memory allocation
failure or similar), the policy is to allow.

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

1 files changed, 3 insertions, 1 deletions

diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 2342545a5ee9..7254ce364006 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1553,7 +1553,9 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
                            "ICMPv6 Redirect: destination is not a neighbour.\n");
                 goto release;
         }
-        if (!xrlim_allow(dst, 1*HZ))
+        if (!rt->rt6i_peer)
+                rt6_bind_peer(rt, 1);
+        if (inet_peer_xrlim_allow(rt->rt6i_peer, 1*HZ))
                 goto release;
 
         if (dev->addr_len) {