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Commit c773e847 authored by David S. Miller's avatar David S. Miller
Browse files

netdev: Move _xmit_lock and xmit_lock_owner into netdev_queue. 



Accesses are mostly structured such that when there are multiple TX
queues the code transformations will be a little bit simpler.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent eb6aafe3

drivers/net/bonding/bond_main.c

+12 −1
Original line number Diff line number Diff line
@@ -5019,6 +5019,17 @@ static int bond_check_params(struct bond_params *params) 


static struct lock_class_key bonding_netdev_xmit_lock_key;



static void bond_set_lockdep_class_one(struct netdev_queue *txq)

{

	lockdep_set_class(&txq->_xmit_lock,

			  &bonding_netdev_xmit_lock_key);

}



static void bond_set_lockdep_class(struct net_device *dev)

{

	bond_set_lockdep_class_one(&dev->tx_queue);

}



/* Create a new bond based on the specified name and bonding parameters.

 * If name is NULL, obtain a suitable "bond%d" name for us.

 * Caller must NOT hold rtnl_lock; we need to release it here before we
@@ -5076,7 +5087,7 @@ int bond_create(char *name, struct bond_params *params) 
		goto out_bond;

	}



	lockdep_set_class(&bond_dev->_xmit_lock, &bonding_netdev_xmit_lock_key);

	bond_set_lockdep_class(bond_dev);



	netif_carrier_off(bond_dev);

drivers/net/hamradio/bpqether.c

+11 −1
Original line number Diff line number Diff line
@@ -124,6 +124,16 @@ static LIST_HEAD(bpq_devices); 
 */

static struct lock_class_key bpq_netdev_xmit_lock_key;



static void bpq_set_lockdep_class_one(struct netdev_queue *txq)

{

	lockdep_set_class(&txq->_xmit_lock, &bpq_netdev_xmit_lock_key);

}



static void bpq_set_lockdep_class(struct net_device *dev)

{

	bpq_set_lockdep_class_one(&dev->tx_queue);

}



/* ------------------------------------------------------------------------ */
@@ -523,7 +533,7 @@ static int bpq_new_device(struct net_device *edev) 
	err = register_netdevice(ndev);

	if (err)

		goto error;

	lockdep_set_class(&ndev->_xmit_lock, &bpq_netdev_xmit_lock_key);

	bpq_set_lockdep_class(ndev);



	/* List protected by RTNL */

	list_add_rcu(&bpq->bpq_list, &bpq_devices);

drivers/net/macvlan.c

+13 −1
Original line number Diff line number Diff line
@@ -277,6 +277,17 @@ static struct lock_class_key macvlan_netdev_xmit_lock_key; 
#define MACVLAN_STATE_MASK \

	((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))



static void macvlan_set_lockdep_class_one(struct netdev_queue *txq)

{

	lockdep_set_class(&txq->_xmit_lock,

			  &macvlan_netdev_xmit_lock_key);

}



static void macvlan_set_lockdep_class(struct net_device *dev)

{

	macvlan_set_lockdep_class_one(&dev->tx_queue);

}



static int macvlan_init(struct net_device *dev)

{

	struct macvlan_dev *vlan = netdev_priv(dev);
@@ -287,7 +298,8 @@ static int macvlan_init(struct net_device *dev) 
	dev->features 		= lowerdev->features & MACVLAN_FEATURES;

	dev->iflink		= lowerdev->ifindex;



	lockdep_set_class(&dev->_xmit_lock, &macvlan_netdev_xmit_lock_key);

	macvlan_set_lockdep_class(dev);



	return 0;

}

drivers/net/wireless/hostap/hostap_hw.c

+11 −1
Original line number Diff line number Diff line
@@ -3102,6 +3102,16 @@ static void prism2_clear_set_tim_queue(local_info_t *local) 
 */

static struct lock_class_key hostap_netdev_xmit_lock_key;



static void prism2_set_lockdep_class_one(struct netdev_queue *txq)

{

	lockdep_set_class(&txq->_xmit_lock,

			  &hostap_netdev_xmit_lock_key);

}



static void prism2_set_lockdep_class(struct net_device *dev)

{

	prism2_set_lockdep_class_one(&dev->tx_queue);

}



static struct net_device *

prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx,
@@ -3268,7 +3278,7 @@ while (0) 
	if (ret >= 0)

		ret = register_netdevice(dev);



	lockdep_set_class(&dev->_xmit_lock, &hostap_netdev_xmit_lock_key);

	prism2_set_lockdep_class(dev);

	rtnl_unlock();

	if (ret < 0) {

		printk(KERN_WARNING "%s: register netdevice failed!\n",

include/linux/netdevice.h

+39 −23
Original line number Diff line number Diff line
@@ -453,6 +453,8 @@ struct netdev_queue { 
	struct net_device	*dev;

	struct Qdisc		*qdisc;

	struct sk_buff		*gso_skb;

	spinlock_t		_xmit_lock;

	int			xmit_lock_owner;

	struct Qdisc		*qdisc_sleeping;

	struct list_head	qdisc_list;

	struct netdev_queue	*next_sched;
@@ -639,12 +641,6 @@ struct net_device 
/*

 * One part is mostly used on xmit path (device)

 */

	/* hard_start_xmit synchronizer */

	spinlock_t		_xmit_lock ____cacheline_aligned_in_smp;

	/* cpu id of processor entered to hard_start_xmit or -1,

	   if nobody entered there.

	 */

	int			xmit_lock_owner;

	void			*priv;	/* pointer to private data	*/

	int			(*hard_start_xmit) (struct sk_buff *skb,

						    struct net_device *dev);
@@ -1402,52 +1398,72 @@ static inline void netif_rx_complete(struct net_device *dev, 
 *

 * Get network device transmit lock

 */

static inline void __netif_tx_lock(struct net_device *dev, int cpu)

static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)

{

	spin_lock(&dev->_xmit_lock);

	dev->xmit_lock_owner = cpu;

	spin_lock(&txq->_xmit_lock);

	txq->xmit_lock_owner = cpu;

}



static inline void netif_tx_lock(struct net_device *dev)

{

	__netif_tx_lock(dev, smp_processor_id());

	__netif_tx_lock(&dev->tx_queue, smp_processor_id());

}



static inline void __netif_tx_lock_bh(struct netdev_queue *txq)

{

	spin_lock_bh(&txq->_xmit_lock);

	txq->xmit_lock_owner = smp_processor_id();

}



static inline void netif_tx_lock_bh(struct net_device *dev)

{

	spin_lock_bh(&dev->_xmit_lock);

	dev->xmit_lock_owner = smp_processor_id();

	__netif_tx_lock_bh(&dev->tx_queue);

}



static inline int netif_tx_trylock(struct net_device *dev)

static inline int __netif_tx_trylock(struct netdev_queue *txq)

{

	int ok = spin_trylock(&dev->_xmit_lock);

	int ok = spin_trylock(&txq->_xmit_lock);

	if (likely(ok))

		dev->xmit_lock_owner = smp_processor_id();

		txq->xmit_lock_owner = smp_processor_id();

	return ok;

}



static inline int netif_tx_trylock(struct net_device *dev)

{

	return __netif_tx_trylock(&dev->tx_queue);

}



static inline void __netif_tx_unlock(struct netdev_queue *txq)

{

	txq->xmit_lock_owner = -1;

	spin_unlock(&txq->_xmit_lock);

}



static inline void netif_tx_unlock(struct net_device *dev)

{

	dev->xmit_lock_owner = -1;

	spin_unlock(&dev->_xmit_lock);

	__netif_tx_unlock(&dev->tx_queue);

}



static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)

{

	txq->xmit_lock_owner = -1;

	spin_unlock_bh(&txq->_xmit_lock);

}



static inline void netif_tx_unlock_bh(struct net_device *dev)

{

	dev->xmit_lock_owner = -1;

	spin_unlock_bh(&dev->_xmit_lock);

	__netif_tx_unlock_bh(&dev->tx_queue);

}



#define HARD_TX_LOCK(dev, cpu) {			\

#define HARD_TX_LOCK(dev, txq, cpu) {			\

	if ((dev->features & NETIF_F_LLTX) == 0) {	\

		__netif_tx_lock(dev, cpu);			\

		__netif_tx_lock(txq, cpu);		\

	}						\

}



#define HARD_TX_UNLOCK(dev) {				\

#define HARD_TX_UNLOCK(dev, txq) {			\

	if ((dev->features & NETIF_F_LLTX) == 0) {	\

		netif_tx_unlock(dev);			\

		__netif_tx_unlock(txq);			\

	}						\

}