netdevice.h

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#define HAVE_TX_TIMEOUT
	void			(*tx_timeout) (struct net_device *dev);

	void			(*vlan_rx_register)(struct net_device *dev,
						    struct vlan_group *grp);
	void			(*vlan_rx_add_vid)(struct net_device *dev,
						   unsigned short vid);
	void			(*vlan_rx_kill_vid)(struct net_device *dev,
						    unsigned short vid);

	int			(*hard_header_parse)(struct sk_buff *skb,
						     unsigned char *haddr);
	int			(*neigh_setup)(struct net_device *dev, struct neigh_parms *);
#ifdef CONFIG_NETPOLL
	struct netpoll_info	*npinfo;
#endif
#ifdef CONFIG_NET_POLL_CONTROLLER
	void                    (*poll_controller)(struct net_device *dev);
#endif

	/* bridge stuff */
	struct net_bridge_port	*br_port;

#ifdef CONFIG_NET_DIVERT
	/* this will get initialized at each interface type init routine */
	struct divert_blk	*divert;
#endif /* CONFIG_NET_DIVERT */

	/* class/net/name entry */
	struct class_device	class_dev;
};

#define	NETDEV_ALIGN		32
#define	NETDEV_ALIGN_CONST	(NETDEV_ALIGN - 1)

static inline void *netdev_priv(struct net_device *dev)
{
	return (char *)dev + ((sizeof(struct net_device)
					+ NETDEV_ALIGN_CONST)
				& ~NETDEV_ALIGN_CONST);
}

#define SET_MODULE_OWNER(dev) do { } while (0)
/* Set the sysfs physical device reference for the network logical device
 * if set prior to registration will cause a symlink during initialization.
 */
#define SET_NETDEV_DEV(net, pdev)	((net)->class_dev.dev = (pdev))

struct packet_type {
	__be16			type;	/* This is really htons(ether_type). */
	struct net_device	*dev;	/* NULL is wildcarded here	     */
	int			(*func) (struct sk_buff *,
					 struct net_device *,
					 struct packet_type *,
					 struct net_device *);
	void			*af_packet_priv;
	struct list_head	list;
};

#include <linux/interrupt.h>
#include <linux/notifier.h>

extern struct net_device		loopback_dev;		/* The loopback */
extern struct net_device		*dev_base;		/* All devices */
extern rwlock_t				dev_base_lock;		/* Device list lock */

extern int 			netdev_boot_setup_check(struct net_device *dev);
extern unsigned long		netdev_boot_base(const char *prefix, int unit);
extern struct net_device    *dev_getbyhwaddr(unsigned short type, char *hwaddr);
extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
extern void		dev_add_pack(struct packet_type *pt);
extern void		dev_remove_pack(struct packet_type *pt);
extern void		__dev_remove_pack(struct packet_type *pt);

extern struct net_device	*dev_get_by_flags(unsigned short flags,
						  unsigned short mask);
extern struct net_device	*dev_get_by_name(const char *name);
extern struct net_device	*__dev_get_by_name(const char *name);
extern int		dev_alloc_name(struct net_device *dev, const char *name);
extern int		dev_open(struct net_device *dev);
extern int		dev_close(struct net_device *dev);
extern int		dev_queue_xmit(struct sk_buff *skb);
extern int		register_netdevice(struct net_device *dev);
extern int		unregister_netdevice(struct net_device *dev);
extern void		free_netdev(struct net_device *dev);
extern void		synchronize_net(void);
extern int 		register_netdevice_notifier(struct notifier_block *nb);
extern int		unregister_netdevice_notifier(struct notifier_block *nb);
extern int		call_netdevice_notifiers(unsigned long val, void *v);
extern struct net_device	*dev_get_by_index(int ifindex);
extern struct net_device	*__dev_get_by_index(int ifindex);
extern int		dev_restart(struct net_device *dev);
#ifdef CONFIG_NETPOLL_TRAP
extern int		netpoll_trap(void);
#endif

typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
extern int		register_gifconf(unsigned int family, gifconf_func_t * gifconf);
static inline int unregister_gifconf(unsigned int family)
{
	return register_gifconf(family, NULL);
}

/*
 * Incoming packets are placed on per-cpu queues so that
 * no locking is needed.
 */

struct softnet_data
{
	struct net_device	*output_queue;
	struct sk_buff_head	input_pkt_queue;
	struct list_head	poll_list;
	struct sk_buff		*completion_queue;

	struct net_device	backlog_dev;	/* Sorry. 8) */
};

DECLARE_PER_CPU(struct softnet_data,softnet_data);

#define HAVE_NETIF_QUEUE

static inline void __netif_schedule(struct net_device *dev)
{
	if (!test_and_set_bit(__LINK_STATE_SCHED, &dev->state)) {
		unsigned long flags;
		struct softnet_data *sd;

		local_irq_save(flags);
		sd = &__get_cpu_var(softnet_data);
		dev->next_sched = sd->output_queue;
		sd->output_queue = dev;
		raise_softirq_irqoff(NET_TX_SOFTIRQ);
		local_irq_restore(flags);
	}
}

static inline void netif_schedule(struct net_device *dev)
{
	if (!test_bit(__LINK_STATE_XOFF, &dev->state))
		__netif_schedule(dev);
}

static inline void netif_start_queue(struct net_device *dev)
{
	clear_bit(__LINK_STATE_XOFF, &dev->state);
}

static inline void netif_wake_queue(struct net_device *dev)
{
#ifdef CONFIG_NETPOLL_TRAP
	if (netpoll_trap())
		return;
#endif
	if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
		__netif_schedule(dev);
}

static inline void netif_stop_queue(struct net_device *dev)
{
#ifdef CONFIG_NETPOLL_TRAP
	if (netpoll_trap())
		return;
#endif
	set_bit(__LINK_STATE_XOFF, &dev->state);
}

static inline int netif_queue_stopped(const struct net_device *dev)
{
	return test_bit(__LINK_STATE_XOFF, &dev->state);
}

static inline int netif_running(const struct net_device *dev)
{
	return test_bit(__LINK_STATE_START, &dev->state);
}


/* Use this variant when it is known for sure that it
 * is executing from interrupt context.
 */
static inline void dev_kfree_skb_irq(struct sk_buff *skb)
{
	if (atomic_dec_and_test(&skb->users)) {
		struct softnet_data *sd;
		unsigned long flags;

		local_irq_save(flags);
		sd = &__get_cpu_var(softnet_data);
		skb->next = sd->completion_queue;
		sd->completion_queue = skb;
		raise_softirq_irqoff(NET_TX_SOFTIRQ);
		local_irq_restore(flags);
	}
}

/* Use this variant in places where it could be invoked
 * either from interrupt or non-interrupt context.
 */
static inline void dev_kfree_skb_any(struct sk_buff *skb)
{
	if (in_irq() || irqs_disabled())
		dev_kfree_skb_irq(skb);
	else
		dev_kfree_skb(skb);
}

#define HAVE_NETIF_RX 1
extern int		netif_rx(struct sk_buff *skb);
extern int		netif_rx_ni(struct sk_buff *skb);
#define HAVE_NETIF_RECEIVE_SKB 1
extern int		netif_receive_skb(struct sk_buff *skb);
extern int		dev_ioctl(unsigned int cmd, void __user *);
extern int		dev_ethtool(struct ifreq *);
extern unsigned		dev_get_flags(const struct net_device *);
extern int		dev_change_flags(struct net_device *, unsigned);
extern int		dev_change_name(struct net_device *, char *);
extern int		dev_set_mtu(struct net_device *, int);
extern int		dev_set_mac_address(struct net_device *,
					    struct sockaddr *);
extern void		dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);

extern void		dev_init(void);

extern int		netdev_nit;
extern int		netdev_budget;

/* Called by rtnetlink.c:rtnl_unlock() */
extern void netdev_run_todo(void);

static inline void dev_put(struct net_device *dev)
{
	atomic_dec(&dev->refcnt);
}

#define __dev_put(dev) atomic_dec(&(dev)->refcnt)
#define dev_hold(dev) atomic_inc(&(dev)->refcnt)

/* Carrier loss detection, dial on demand. The functions netif_carrier_on
 * and _off may be called from IRQ context, but it is caller
 * who is responsible for serialization of these calls.
 */

extern void linkwatch_fire_event(struct net_device *dev);

static inline int netif_carrier_ok(const struct net_device *dev)
{
	return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
}

extern void __netdev_watchdog_up(struct net_device *dev);

extern void netif_carrier_on(struct net_device *dev);

extern void netif_carrier_off(struct net_device *dev);

/* Hot-plugging. */
static inline int netif_device_present(struct net_device *dev)
{
	return test_bit(__LINK_STATE_PRESENT, &dev->state);
}

static inline void netif_device_detach(struct net_device *dev)
{
	if (test_and_clear_bit(__LINK_STATE_PRESENT, &dev->state) &&
	    netif_running(dev)) {
		netif_stop_queue(dev);
	}
}

static inline void netif_device_attach(struct net_device *dev)
{
	if (!test_and_set_bit(__LINK_STATE_PRESENT, &dev->state) &&
	    netif_running(dev)) {
		netif_wake_queue(dev);
 		__netdev_watchdog_up(dev);
	}
}

/*
 * Network interface message level settings
 */
#define HAVE_NETIF_MSG 1

enum {
	NETIF_MSG_DRV		= 0x0001,
	NETIF_MSG_PROBE		= 0x0002,
	NETIF_MSG_LINK		= 0x0004,
	NETIF_MSG_TIMER		= 0x0008,
	NETIF_MSG_IFDOWN	= 0x0010,
	NETIF_MSG_IFUP		= 0x0020,
	NETIF_MSG_RX_ERR	= 0x0040,
	NETIF_MSG_TX_ERR	= 0x0080,
	NETIF_MSG_TX_QUEUED	= 0x0100,
	NETIF_MSG_INTR		= 0x0200,
	NETIF_MSG_TX_DONE	= 0x0400,
	NETIF_MSG_RX_STATUS	= 0x0800,
	NETIF_MSG_PKTDATA	= 0x1000,
	NETIF_MSG_HW		= 0x2000,
	NETIF_MSG_WOL		= 0x4000,
};

#define netif_msg_drv(p)	((p)->msg_enable & NETIF_MSG_DRV)
#define netif_msg_probe(p)	((p)->msg_enable & NETIF_MSG_PROBE)
#define netif_msg_link(p)	((p)->msg_enable & NETIF_MSG_LINK)
#define netif_msg_timer(p)	((p)->msg_enable & NETIF_MSG_TIMER)
#define netif_msg_ifdown(p)	((p)->msg_enable & NETIF_MSG_IFDOWN)
#define netif_msg_ifup(p)	((p)->msg_enable & NETIF_MSG_IFUP)
#define netif_msg_rx_err(p)	((p)->msg_enable & NETIF_MSG_RX_ERR)
#define netif_msg_tx_err(p)	((p)->msg_enable & NETIF_MSG_TX_ERR)
#define netif_msg_tx_queued(p)	((p)->msg_enable & NETIF_MSG_TX_QUEUED)
#define netif_msg_intr(p)	((p)->msg_enable & NETIF_MSG_INTR)
#define netif_msg_tx_done(p)	((p)->msg_enable & NETIF_MSG_TX_DONE)
#define netif_msg_rx_status(p)	((p)->msg_enable & NETIF_MSG_RX_STATUS)
#define netif_msg_pktdata(p)	((p)->msg_enable & NETIF_MSG_PKTDATA)
#define netif_msg_hw(p)		((p)->msg_enable & NETIF_MSG_HW)
#define netif_msg_wol(p)	((p)->msg_enable & NETIF_MSG_WOL)

static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
{
	/* use default */
	if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
		return default_msg_enable_bits;
	if (debug_value == 0)	/* no output */
		return 0;
	/* set low N bits */
	return (1 << debug_value) - 1;
}

/* Schedule rx intr now? */

static inline int netif_rx_schedule_prep(struct net_device *dev)
{
	return netif_running(dev) &&
		!test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
}

/* Add interface to tail of rx poll list. This assumes that _prep has
 * already been called and returned 1.
 */

static inline void __netif_rx_schedule(struct net_device *dev)
{
	unsigned long flags;

	local_irq_save(flags);
	dev_hold(dev);
	list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
	if (dev->quota < 0)
		dev->quota += dev->weight;
	else
		dev->quota = dev->weight;
	__raise_softirq_irqoff(NET_RX_SOFTIRQ);
	local_irq_restore(flags);
}

/* Try to reschedule poll. Called by irq handler. */

static inline void netif_rx_schedule(struct net_device *dev)
{
	if (netif_rx_schedule_prep(dev))
		__netif_rx_schedule(dev);
}

/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
 * Do not inline this?
 */
static inline int netif_rx_reschedule(struct net_device *dev, int undo)
{
	if (netif_rx_schedule_prep(dev)) {
		unsigned long flags;

		dev->quota += undo;

		local_irq_save(flags);
		list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
		__raise_softirq_irqoff(NET_RX_SOFTIRQ);
		local_irq_restore(flags);
		return 1;
	}
	return 0;
}

/* Remove interface from poll list: it must be in the poll list
 * on current cpu. This primitive is called by dev->poll(), when
 * it completes the work. The device cannot be out of poll list at this
 * moment, it is BUG().
 */
static inline void netif_rx_complete(struct net_device *dev)
{
	unsigned long flags;

	local_irq_save(flags);
	BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
	list_del(&dev->poll_list);
	smp_mb__before_clear_bit();
	clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
	local_irq_restore(flags);
}

static inline void netif_poll_disable(struct net_device *dev)
{
	while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state)) {
		/* No hurry. */
		current->state = TASK_INTERRUPTIBLE;
		schedule_timeout(1);
	}
}

static inline void netif_poll_enable(struct net_device *dev)
{
	clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
}

/* same as netif_rx_complete, except that local_irq_save(flags)
 * has already been issued
 */
static inline void __netif_rx_complete(struct net_device *dev)
{
	BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
	list_del(&dev->poll_list);
	smp_mb__before_clear_bit();
	clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
}

static inline void netif_tx_disable(struct net_device *dev)
{
	spin_lock_bh(&dev->xmit_lock);
	netif_stop_queue(dev);
	spin_unlock_bh(&dev->xmit_lock);
}

/* These functions live elsewhere (drivers/net/net_init.c, but related) */

extern void		ether_setup(struct net_device *dev);

/* Support for loadable net-drivers */
extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
				       void (*setup)(struct net_device *));
extern int		register_netdev(struct net_device *dev);
extern void		unregister_netdev(struct net_device *dev);
/* Functions used for multicast support */
extern void		dev_mc_upload(struct net_device *dev);
extern int 		dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
extern int		dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
extern void		dev_mc_discard(struct net_device *dev);
extern void		dev_set_promiscuity(struct net_device *dev, int inc);
extern void		dev_set_allmulti(struct net_device *dev, int inc);
extern void		netdev_state_change(struct net_device *dev);
extern void		netdev_features_change(struct net_device *dev);
/* Load a device via the kmod */
extern void		dev_load(const char *name);
extern void		dev_mcast_init(void);
extern int		netdev_max_backlog;
extern int		weight_p;
extern int		netdev_set_master(struct net_device *dev, struct net_device *master);
extern int skb_checksum_help(struct sk_buff *skb, int inward);
/* rx skb timestamps */
extern void		net_enable_timestamp(void);
extern void		net_disable_timestamp(void);

#ifdef CONFIG_PROC_FS
extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
extern void dev_seq_stop(struct seq_file *seq, void *v);
#endif

extern void linkwatch_run_queue(void);

#endif /* __KERNEL__ */

#endif	/* _LINUX_DEV_H */