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, 4 insertions, 1 deletions

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 5f8d242be3f3..2600e2288724 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -479,10 +479,13 @@ int ip6_forward(struct sk_buff *skb)
                 else
                         target = &hdr->daddr;
 
+                if (!rt->rt6i_peer)
+                        rt6_bind_peer(rt, 1);
+
                 /* Limit redirects both by destination (here)
                    and by source (inside ndisc_send_redirect)
                  */
-                if (xrlim_allow(dst, 1*HZ))
+                if (inet_peer_xrlim_allow(rt->rt6i_peer, 1*HZ))
                         ndisc_send_redirect(skb, n, target);
         } else {
                 int addrtype = ipv6_addr_type(&hdr->saddr);