ipv4: Only compute net once in ip_rcv_finish

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index ff908863f22ebb0ed9fc2ae5bc12cfeff1b214b1..cc242b9501d90d3eca4aed9f26c51108b7fe0e5b 100644 (file)
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -314,6 +314,7 @@ EXPORT_SYMBOL(sysctl_ip_early_demux);
 static int ip_rcv_finish(struct sock *sk, struct sk_buff *skb)
 {
        const struct iphdr *iph = ip_hdr(skb);
+       struct net *net = dev_net(skb->dev);
        struct rtable *rt;
 
        if (sysctl_ip_early_demux && !skb_dst(skb) && !skb->sk) {
@@ -337,8 +338,7 @@ static int ip_rcv_finish(struct sock *sk, struct sk_buff *skb)
                                               iph->tos, skb->dev);
                if (unlikely(err)) {
                        if (err == -EXDEV)
-                               NET_INC_STATS_BH(dev_net(skb->dev),
-                                                LINUX_MIB_IPRPFILTER);
+                               NET_INC_STATS_BH(net, LINUX_MIB_IPRPFILTER);
                        goto drop;
                }
        }
@@ -359,11 +359,9 @@ static int ip_rcv_finish(struct sock *sk, struct sk_buff *skb)
 
        rt = skb_rtable(skb);
        if (rt->rt_type == RTN_MULTICAST) {
-               IP_UPD_PO_STATS_BH(dev_net(rt->dst.dev), IPSTATS_MIB_INMCAST,
-                               skb->len);
+               IP_UPD_PO_STATS_BH(net, IPSTATS_MIB_INMCAST, skb->len);
        } else if (rt->rt_type == RTN_BROADCAST)
-               IP_UPD_PO_STATS_BH(dev_net(rt->dst.dev), IPSTATS_MIB_INBCAST,
-                               skb->len);
+               IP_UPD_PO_STATS_BH(net, IPSTATS_MIB_INBCAST, skb->len);
 
        return dst_input(skb);