net: ingress filter message limit
If user misconfigures ingress and causes a redirection loop, don't
overwhelm the log. This is also a error case so make it unlikely.
Found by inspection, luckily not in real system.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dev.c b/net/core/dev.c
index b74fcd3..5d1282d 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2646,10 +2646,10 @@
int result = TC_ACT_OK;
struct Qdisc *q;
- if (MAX_RED_LOOP < ttl++) {
- printk(KERN_WARNING
- "Redir loop detected Dropping packet (%d->%d)\n",
- skb->skb_iif, dev->ifindex);
+ if (unlikely(MAX_RED_LOOP < ttl++)) {
+ if (net_ratelimit())
+ pr_warning( "Redir loop detected Dropping packet (%d->%d)\n",
+ skb->skb_iif, dev->ifindex);
return TC_ACT_SHOT;
}