1 files changed, 15 insertions, 15 deletions

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index fd9af60397b..ff622069fce 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1111,10 +1111,7 @@ static unsigned int ipv4_mtu(const struct dst_entry *dst)
 	const struct rtable *rt = (const struct rtable *) dst;
 	unsigned int mtu = rt->rt_pmtu;
 
-	if (mtu && time_after_eq(jiffies, rt->dst.expires))
-		mtu = 0;
-
-	if (!mtu)
+	if (!mtu || time_after_eq(jiffies, rt->dst.expires))
 		mtu = dst_metric_raw(dst, RTAX_MTU);
 
 	if (mtu && rt_is_output_route(rt))
@@ -1566,11 +1563,14 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
 	if (ipv4_is_zeronet(daddr))
 		goto martian_destination;
 
-	if (likely(!IN_DEV_ROUTE_LOCALNET(in_dev))) {
-		if (ipv4_is_loopback(daddr))
+	/* Following code try to avoid calling IN_DEV_NET_ROUTE_LOCALNET(),
+	 * and call it once if daddr or/and saddr are loopback addresses
+	 */
+	if (ipv4_is_loopback(daddr)) {
+		if (!IN_DEV_NET_ROUTE_LOCALNET(in_dev, net))
 			goto martian_destination;
-
-		if (ipv4_is_loopback(saddr))
+	} else if (ipv4_is_loopback(saddr)) {
+		if (!IN_DEV_NET_ROUTE_LOCALNET(in_dev, net))
 			goto martian_source;
 	}
 
@@ -1595,7 +1595,7 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
 
 	if (res.type == RTN_LOCAL) {
 		err = fib_validate_source(skb, saddr, daddr, tos,
-					  net->loopback_dev->ifindex,
+					  LOOPBACK_IFINDEX,
 					  dev, in_dev, &itag);
 		if (err < 0)
 			goto martian_source_keep_err;
@@ -1871,7 +1871,7 @@ struct rtable *__ip_route_output_key(struct net *net, struct flowi4 *fl4)
 
 	orig_oif = fl4->flowi4_oif;
 
-	fl4->flowi4_iif = net->loopback_dev->ifindex;
+	fl4->flowi4_iif = LOOPBACK_IFINDEX;
 	fl4->flowi4_tos = tos & IPTOS_RT_MASK;
 	fl4->flowi4_scope = ((tos & RTO_ONLINK) ?
 			 RT_SCOPE_LINK : RT_SCOPE_UNIVERSE);
@@ -1960,7 +1960,7 @@ struct rtable *__ip_route_output_key(struct net *net, struct flowi4 *fl4)
 		if (!fl4->daddr)
 			fl4->daddr = fl4->saddr = htonl(INADDR_LOOPBACK);
 		dev_out = net->loopback_dev;
-		fl4->flowi4_oif = net->loopback_dev->ifindex;
+		fl4->flowi4_oif = LOOPBACK_IFINDEX;
 		res.type = RTN_LOCAL;
 		flags |= RTCF_LOCAL;
 		goto make_route;
@@ -2131,7 +2131,7 @@ struct rtable *ip_route_output_flow(struct net *net, struct flowi4 *flp4,
 EXPORT_SYMBOL_GPL(ip_route_output_flow);
 
 static int rt_fill_info(struct net *net,  __be32 dst, __be32 src,
-			struct flowi4 *fl4, struct sk_buff *skb, u32 pid,
+			struct flowi4 *fl4, struct sk_buff *skb, u32 portid,
 			u32 seq, int event, int nowait, unsigned int flags)
 {
 	struct rtable *rt = skb_rtable(skb);
@@ -2141,7 +2141,7 @@ static int rt_fill_info(struct net *net,  __be32 dst, __be32 src,
 	u32 error;
 	u32 metrics[RTAX_MAX];
 
-	nlh = nlmsg_put(skb, pid, seq, event, sizeof(*r), flags);
+	nlh = nlmsg_put(skb, portid, seq, event, sizeof(*r), flags);
 	if (nlh == NULL)
 		return -EMSGSIZE;
 
@@ -2301,12 +2301,12 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh, void
 		rt->rt_flags |= RTCF_NOTIFY;
 
 	err = rt_fill_info(net, dst, src, &fl4, skb,
-			   NETLINK_CB(in_skb).pid, nlh->nlmsg_seq,
+			   NETLINK_CB(in_skb).portid, nlh->nlmsg_seq,
 			   RTM_NEWROUTE, 0, 0);
 	if (err <= 0)
 		goto errout_free;
 
-	err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid);
+	err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
 errout:
 	return err;