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netdevice: move netdev_cap_txqueue for shared usage to header

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In order to allow users to invoke netdev_cap_txqueue, it needs to
be moved into netdevice.h header file. While at it, also add kernel
doc header to document the API.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann 2014-02-16 15:55:21 +01:00 • committed by David S. Miller
parent 99932d4fc0
commit b9507bdaf4
2 changed files with 21 additions and 12 deletions
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20
include/linux/netdevice.h
View file

@ -2278,6 +2278,26 @@ static inline void netdev_reset_queue(struct net_device *dev_queue)
netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0)); netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
} }
/**
* netdev_cap_txqueue - check if selected tx queue exceeds device queues
* @dev: network device
* @queue_index: given tx queue index
*
* Returns 0 if given tx queue index >= number of device tx queues,
* otherwise returns the originally passed tx queue index.
*/
static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
{
if (unlikely(queue_index >= dev->real_num_tx_queues)) {
net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
dev->name, queue_index,
dev->real_num_tx_queues);
return 0;
}
return queue_index;
}
/** /**
* netif_running - test if up * netif_running - test if up
* @dev: network device * @dev: network device

13
net/core/flow_dissector.c
View file

@ -323,17 +323,6 @@ u32 __skb_get_poff(const struct sk_buff *skb)
return poff; return poff;
} }
static inline u16 dev_cap_txqueue(struct net_device *dev, u16 queue_index)
{
if (unlikely(queue_index >= dev->real_num_tx_queues)) {
net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
dev->name, queue_index,
dev->real_num_tx_queues);
return 0;
}
return queue_index;
}
static inline int get_xps_queue(struct net_device *dev, struct sk_buff *skb) static inline int get_xps_queue(struct net_device *dev, struct sk_buff *skb)
{ {
#ifdef CONFIG_XPS #ifdef CONFIG_XPS
@ -408,7 +397,7 @@ struct netdev_queue *netdev_pick_tx(struct net_device *dev,
queue_index = __netdev_pick_tx(dev, skb); queue_index = __netdev_pick_tx(dev, skb);
if (!accel_priv) if (!accel_priv)
queue_index = dev_cap_txqueue(dev, queue_index); queue_index = netdev_cap_txqueue(dev, queue_index);
} }
skb_set_queue_mapping(skb, queue_index); skb_set_queue_mapping(skb, queue_index);