---

yaml
---
r: 103592
b: refs/heads/master
c: 8f0f222
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 51cb6db0f5654f08a4a6bfa3888dc36a51c2df3e
+refs/heads/master: 8f0f2223cc08a5ae9a77f40edfe02e8a9f1abd77

trunk/net/core/dev.c

@@ -121,6 +121,9 @@
 #include <linux/ctype.h>
 #include <linux/if_arp.h>
 #include <linux/if_vlan.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/in.h>
 
 #include "net-sysfs.h"
 
@@ -1665,13 +1668,62 @@ int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
  *          --BLG
  */
 
+static u16 simple_tx_hash(struct net_device *dev, struct sk_buff *skb)
+{
+	u32 *addr, *ports, hash, ihl;
+	u8 ip_proto;
+	int alen;
+
+	switch (skb->protocol) {
+	case __constant_htons(ETH_P_IP):
+		ip_proto = ip_hdr(skb)->protocol;
+		addr = &ip_hdr(skb)->saddr;
+		ihl = ip_hdr(skb)->ihl;
+		alen = 2;
+		break;
+	case __constant_htons(ETH_P_IPV6):
+		ip_proto = ipv6_hdr(skb)->nexthdr;
+		addr = &ipv6_hdr(skb)->saddr.s6_addr32[0];
+		ihl = (40 >> 2);
+		alen = 8;
+		break;
+	default:
+		return 0;
+	}
+
+	ports = (u32 *) (skb_network_header(skb) + (ihl * 4));
+
+	hash = 0;
+	while (alen--)
+		hash ^= *addr++;
+
+	switch (ip_proto) {
+	case IPPROTO_TCP:
+	case IPPROTO_UDP:
+	case IPPROTO_DCCP:
+	case IPPROTO_ESP:
+	case IPPROTO_AH:
+	case IPPROTO_SCTP:
+	case IPPROTO_UDPLITE:
+		hash ^= *ports;
+		break;
+
+	default:
+		break;
+	}
+
+	return hash % dev->real_num_tx_queues;
+}
+
 static struct netdev_queue *dev_pick_tx(struct net_device *dev,
 					struct sk_buff *skb)
 {
 	u16 queue_index = 0;
 
 	if (dev->select_queue)
 		queue_index = dev->select_queue(dev, skb);
+	else if (dev->real_num_tx_queues > 1)
+		queue_index = simple_tx_hash(dev, skb);
 
 	skb_set_queue_mapping(skb, queue_index);
 	return netdev_get_tx_queue(dev, queue_index);