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arp: Do not perturb drop profiles with ignored ARP packets

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We do not wish to disturb dropwatch or perf drop profiles with an ARP
we will ignore.

Signed-off-by: Rick Jones <rick.jones2@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Rick Jones 2014-09-25 10:55:28 -07:00 committed by David S. Miller
parent 18d0264f63
commit 825bae5d97
1 changed files with 5 additions and 1 deletions
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6
net/ipv4/arp.c
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@ -953,10 +953,11 @@ static int arp_rcv(struct sk_buff *skb, struct net_device *dev,
{
const struct arphdr *arp;
/* do not tweak dropwatch on an ARP we will ignore */
if (dev->flags & IFF_NOARP ||
skb->pkt_type == PACKET_OTHERHOST ||
skb->pkt_type == PACKET_LOOPBACK)
goto freeskb;
goto consumeskb;
skb = skb_share_check(skb, GFP_ATOMIC);
if (!skb)
@ -974,6 +975,9 @@ static int arp_rcv(struct sk_buff *skb, struct net_device *dev,
return NF_HOOK(NFPROTO_ARP, NF_ARP_IN, skb, dev, NULL, arp_process);
consumeskb:
consume_skb(skb);
return 0;
freeskb:
kfree_skb(skb);
out_of_mem: