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net: Call skb_get_hash in get_xps_queue and __skb_tx_hash 

Call standard function to get a packet hash instead of taking this from
skb->sk->sk_hash or only using skb->protocol.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert 2014-07-01 21:32:27 -07:00 committed by David S. Miller
parent b73c3d0e4f
commit 0e001614e8
3 changed files with 7 additions and 26 deletions
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2
include/linux/netdevice.h
View File

@ -2486,7 +2486,7 @@ static inline int netif_set_xps_queue(struct net_device *dev,
* as a distribution range limit for the returned value.
*/
static inline u16 skb_tx_hash(const struct net_device *dev,
const struct sk_buff *skb)
struct sk_buff *skb)
{
return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
}

2
include/linux/skbuff.h
View File

@ -3005,7 +3005,7 @@ static inline bool skb_rx_queue_recorded(const struct sk_buff *skb)
return skb->queue_mapping != 0;
}
u16 __skb_tx_hash(const struct net_device *dev, const struct sk_buff *skb,
u16 __skb_tx_hash(const struct net_device *dev, struct sk_buff *skb,
unsigned int num_tx_queues);
static inline struct sec_path *skb_sec_path(struct sk_buff *skb)

29
net/core/flow_dissector.c
View File

@ -196,12 +196,6 @@ static __always_inline u32 __flow_hash_3words(u32 a, u32 b, u32 c)
return jhash_3words(a, b, c, hashrnd);
}
static __always_inline u32 __flow_hash_1word(u32 a)
{
__flow_hash_secret_init();
return jhash_1word(a, hashrnd);
}
static inline u32 __flow_hash_from_keys(struct flow_keys *keys)
{
u32 hash;
@ -253,7 +247,7 @@ EXPORT_SYMBOL(__skb_get_hash);
* Returns a Tx hash based on the given packet descriptor a Tx queues' number
* to be used as a distribution range.
*/
u16 __skb_tx_hash(const struct net_device *dev, const struct sk_buff *skb,
u16 __skb_tx_hash(const struct net_device *dev, struct sk_buff *skb,
unsigned int num_tx_queues)
{
u32 hash;
@ -273,13 +267,7 @@ u16 __skb_tx_hash(const struct net_device *dev, const struct sk_buff *skb,
qcount = dev->tc_to_txq[tc].count;
}
if (skb->sk && skb->sk->sk_hash)
hash = skb->sk->sk_hash;
else
hash = (__force u16) skb->protocol;
hash = __flow_hash_1word(hash);
return (u16) (((u64) hash * qcount) >> 32) + qoffset;
return (u16) (((u64)skb_get_hash(skb) * qcount) >> 32) + qoffset;
}
EXPORT_SYMBOL(__skb_tx_hash);
@ -351,17 +339,10 @@ static inline int get_xps_queue(struct net_device *dev, struct sk_buff *skb)
if (map) {
if (map->len == 1)
queue_index = map->queues[0];
else {
u32 hash;
if (skb->sk && skb->sk->sk_hash)
hash = skb->sk->sk_hash;
else
hash = (__force u16) skb->protocol ^
skb->hash;
hash = __flow_hash_1word(hash);
else
queue_index = map->queues[
((u64)hash * map->len) >> 32];
}
((u64)skb_get_hash(skb) * map->len) >> 32];
if (unlikely(queue_index >= dev->real_num_tx_queues))
queue_index = -1;
}