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Diffstat (limited to 'net/core')
-rw-r--r--net/core/dev.c73
1 files changed, 14 insertions, 59 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index cb8caa93cac..e61b95c11fc 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1708,72 +1708,27 @@ out_kfree_skb:
return 0;
}
-static u32 simple_tx_hashrnd;
-static int simple_tx_hashrnd_initialized = 0;
+static u32 skb_tx_hashrnd;
+static int skb_tx_hashrnd_initialized = 0;
-static u16 simple_tx_hash(struct net_device *dev, struct sk_buff *skb)
+static u16 skb_tx_hash(struct net_device *dev, struct sk_buff *skb)
{
- u32 addr1, addr2, ports;
- u32 hash, ihl;
- u8 ip_proto = 0;
+ u32 hash;
- if (unlikely(!simple_tx_hashrnd_initialized)) {
- get_random_bytes(&simple_tx_hashrnd, 4);
- simple_tx_hashrnd_initialized = 1;
+ if (unlikely(!skb_tx_hashrnd_initialized)) {
+ get_random_bytes(&skb_tx_hashrnd, 4);
+ skb_tx_hashrnd_initialized = 1;
}
if (skb_rx_queue_recorded(skb)) {
- u32 val = skb_get_rx_queue(skb);
-
- hash = jhash_1word(val, simple_tx_hashrnd);
- goto out;
- }
-
- if (skb->sk && skb->sk->sk_hash) {
- u32 val = skb->sk->sk_hash;
-
- hash = jhash_1word(val, simple_tx_hashrnd);
- goto out;
- }
-
- switch (skb->protocol) {
- case htons(ETH_P_IP):
- if (!(ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)))
- ip_proto = ip_hdr(skb)->protocol;
- addr1 = ip_hdr(skb)->saddr;
- addr2 = ip_hdr(skb)->daddr;
- ihl = ip_hdr(skb)->ihl;
- break;
- case htons(ETH_P_IPV6):
- ip_proto = ipv6_hdr(skb)->nexthdr;
- addr1 = ipv6_hdr(skb)->saddr.s6_addr32[3];
- addr2 = ipv6_hdr(skb)->daddr.s6_addr32[3];
- ihl = (40 >> 2);
- break;
- default:
- return 0;
- }
-
-
- switch (ip_proto) {
- case IPPROTO_TCP:
- case IPPROTO_UDP:
- case IPPROTO_DCCP:
- case IPPROTO_ESP:
- case IPPROTO_AH:
- case IPPROTO_SCTP:
- case IPPROTO_UDPLITE:
- ports = *((u32 *) (skb_network_header(skb) + (ihl * 4)));
- break;
-
- default:
- ports = 0;
- break;
- }
+ hash = skb_get_rx_queue(skb);
+ } else if (skb->sk && skb->sk->sk_hash) {
+ hash = skb->sk->sk_hash;
+ } else
+ hash = skb->protocol;
- hash = jhash_3words(addr1, addr2, ports, simple_tx_hashrnd);
+ hash = jhash_1word(hash, skb_tx_hashrnd);
-out:
return (u16) (((u64) hash * dev->real_num_tx_queues) >> 32);
}
@@ -1786,7 +1741,7 @@ static struct netdev_queue *dev_pick_tx(struct net_device *dev,
if (ops->ndo_select_queue)
queue_index = ops->ndo_select_queue(dev, skb);
else if (dev->real_num_tx_queues > 1)
- queue_index = simple_tx_hash(dev, skb);
+ queue_index = skb_tx_hash(dev, skb);
skb_set_queue_mapping(skb, queue_index);
return netdev_get_tx_queue(dev, queue_index);