From 416186fbf8c5b4e4465a10c6ac7a45b6c47144b2 Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Thu, 10 Jan 2013 08:56:51 +0000 Subject: [PATCH] net: Split core bits of netdev_pick_tx into __netdev_pick_tx This change splits the core bits of netdev_pick_tx into a separate function. The main idea behind this is to make this code accessible to select queue functions when they decide to process the standard path instead of their own custom path in their select queue routine. Signed-off-by: Alexander Duyck Signed-off-by: David S. Miller --- include/linux/netdevice.h | 1 + net/core/dev.c | 57 ++++++++++++++++++++++++++--------------------- 2 files changed, 33 insertions(+), 25 deletions(-) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 0209ac3..608c3ac 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1403,6 +1403,7 @@ static inline void netdev_for_each_tx_queue(struct net_device *dev, extern struct netdev_queue *netdev_pick_tx(struct net_device *dev, struct sk_buff *skb); +extern u16 __netdev_pick_tx(struct net_device *dev, struct sk_buff *skb); /* * Net namespace inlines diff --git a/net/core/dev.c b/net/core/dev.c index 4794cae8..81ff671 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2495,37 +2495,44 @@ static inline int get_xps_queue(struct net_device *dev, struct sk_buff *skb) #endif } -struct netdev_queue *netdev_pick_tx(struct net_device *dev, - struct sk_buff *skb) +u16 __netdev_pick_tx(struct net_device *dev, struct sk_buff *skb) { - int queue_index; - const struct net_device_ops *ops = dev->netdev_ops; - - if (dev->real_num_tx_queues == 1) - queue_index = 0; - else if (ops->ndo_select_queue) { - queue_index = ops->ndo_select_queue(dev, skb); - queue_index = dev_cap_txqueue(dev, queue_index); - } else { - struct sock *sk = skb->sk; - queue_index = sk_tx_queue_get(sk); + struct sock *sk = skb->sk; + int queue_index = sk_tx_queue_get(sk); - if (queue_index < 0 || skb->ooo_okay || - queue_index >= dev->real_num_tx_queues) { - int old_index = queue_index; + if (queue_index < 0 || skb->ooo_okay || + queue_index >= dev->real_num_tx_queues) { + int new_index = get_xps_queue(dev, skb); + if (new_index < 0) + new_index = skb_tx_hash(dev, skb); - queue_index = get_xps_queue(dev, skb); - if (queue_index < 0) - queue_index = skb_tx_hash(dev, skb); - - if (queue_index != old_index && sk) { - struct dst_entry *dst = + if (queue_index != new_index && sk) { + struct dst_entry *dst = rcu_dereference_check(sk->sk_dst_cache, 1); - if (dst && skb_dst(skb) == dst) - sk_tx_queue_set(sk, queue_index); - } + if (dst && skb_dst(skb) == dst) + sk_tx_queue_set(sk, queue_index); + } + + queue_index = new_index; + } + + return queue_index; +} + +struct netdev_queue *netdev_pick_tx(struct net_device *dev, + struct sk_buff *skb) +{ + int queue_index = 0; + + if (dev->real_num_tx_queues != 1) { + const struct net_device_ops *ops = dev->netdev_ops; + if (ops->ndo_select_queue) + queue_index = ops->ndo_select_queue(dev, skb); + else + queue_index = __netdev_pick_tx(dev, skb); + queue_index = dev_cap_txqueue(dev, queue_index); } skb_set_queue_mapping(skb, queue_index); -- 2.7.4