1 files changed, 11 insertions, 15 deletions

diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index d930dc5..d859bcc 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -146,7 +146,7 @@
 #include <linux/netlink.h>
 
 /*
- *	Process Router Attention IP option
+ *	Process Router Attention IP option (RFC 2113)
  */
 int ip_call_ra_chain(struct sk_buff *skb)
 {
@@ -155,8 +155,7 @@ int ip_call_ra_chain(struct sk_buff *skb)
 	struct sock *last = NULL;
 	struct net_device *dev = skb->dev;
 
-	read_lock(&ip_ra_lock);
-	for (ra = ip_ra_chain; ra; ra = ra->next) {
+	for (ra = rcu_dereference(ip_ra_chain); ra; ra = rcu_dereference(ra->next)) {
 		struct sock *sk = ra->sk;
 
 		/* If socket is bound to an interface, only report
@@ -167,10 +166,8 @@ int ip_call_ra_chain(struct sk_buff *skb)
 		     sk->sk_bound_dev_if == dev->ifindex) &&
 		    net_eq(sock_net(sk), dev_net(dev))) {
 			if (ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)) {
-				if (ip_defrag(skb, IP_DEFRAG_CALL_RA_CHAIN)) {
-					read_unlock(&ip_ra_lock);
+				if (ip_defrag(skb, IP_DEFRAG_CALL_RA_CHAIN))
 					return 1;
-				}
 			}
 			if (last) {
 				struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
@@ -183,10 +180,8 @@ int ip_call_ra_chain(struct sk_buff *skb)
 
 	if (last) {
 		raw_rcv(last, skb);
-		read_unlock(&ip_ra_lock);
 		return 1;
 	}
-	read_unlock(&ip_ra_lock);
 	return 0;
 }
 
@@ -298,18 +293,16 @@ static inline int ip_rcv_options(struct sk_buff *skb)
 	}
 
 	if (unlikely(opt->srr)) {
-		struct in_device *in_dev = in_dev_get(dev);
+		struct in_device *in_dev = __in_dev_get_rcu(dev);
+
 		if (in_dev) {
 			if (!IN_DEV_SOURCE_ROUTE(in_dev)) {
 				if (IN_DEV_LOG_MARTIANS(in_dev) &&
 				    net_ratelimit())
 					printk(KERN_INFO "source route option %pI4 -> %pI4\n",
 					       &iph->saddr, &iph->daddr);
-				in_dev_put(in_dev);
 				goto drop;
 			}
-
-			in_dev_put(in_dev);
 		}
 
 		if (ip_options_rcv_srr(skb))
@@ -340,13 +333,16 @@ static int ip_rcv_finish(struct sk_buff *skb)
 			else if (err == -ENETUNREACH)
 				IP_INC_STATS_BH(dev_net(skb->dev),
 						IPSTATS_MIB_INNOROUTES);
+			else if (err == -EXDEV)
+				NET_INC_STATS_BH(dev_net(skb->dev),
+						 LINUX_MIB_IPRPFILTER);
 			goto drop;
 		}
 	}
 
 #ifdef CONFIG_NET_CLS_ROUTE
 	if (unlikely(skb_dst(skb)->tclassid)) {
-		struct ip_rt_acct *st = per_cpu_ptr(ip_rt_acct, smp_processor_id());
+		struct ip_rt_acct *st = this_cpu_ptr(ip_rt_acct);
 		u32 idx = skb_dst(skb)->tclassid;
 		st[idx&0xFF].o_packets++;
 		st[idx&0xFF].o_bytes += skb->len;
@@ -360,10 +356,10 @@ static int ip_rcv_finish(struct sk_buff *skb)
 
 	rt = skb_rtable(skb);
 	if (rt->rt_type == RTN_MULTICAST) {
-		IP_UPD_PO_STATS_BH(dev_net(rt->u.dst.dev), IPSTATS_MIB_INMCAST,
+		IP_UPD_PO_STATS_BH(dev_net(rt->dst.dev), IPSTATS_MIB_INMCAST,
 				skb->len);
 	} else if (rt->rt_type == RTN_BROADCAST)
-		IP_UPD_PO_STATS_BH(dev_net(rt->u.dst.dev), IPSTATS_MIB_INBCAST,
+		IP_UPD_PO_STATS_BH(dev_net(rt->dst.dev), IPSTATS_MIB_INBCAST,
 				skb->len);
 
 	return dst_input(skb);