netdevice.h

linux得一些常用命令,以及linux环境下的c编程

						    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 *);
	int			(*accept_fastpath)(struct net_device *, struct dst_entry*);

	/* open/release and usage marking */
	struct module *owner;

	/* bridge stuff */
	struct net_bridge_port	*br_port;

#ifdef CONFIG_NET_FASTROUTE
#define NETDEV_FASTROUTE_HMASK 0xF
	/* Semi-private data. Keep it at the end of device struct. */
	rwlock_t		fastpath_lock;
	struct dst_entry	*fastpath[NETDEV_FASTROUTE_HMASK+1];
#endif
#ifdef CONFIG_NET_DIVERT
	/* this will get initialized at each interface type init routine */
	struct divert_blk	*divert;
#endif /* CONFIG_NET_DIVERT */
};


struct packet_type 
{
	unsigned short		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 *);
	void			*data;	/* Private to the packet type		*/
	struct packet_type	*next;
};


#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_add(char *name, struct ifmap *map);
extern int 			netdev_boot_setup_check(struct net_device *dev);
extern struct net_device    *dev_getbyhwaddr(unsigned short type, char *hwaddr);
extern void		dev_add_pack(struct packet_type *pt);
extern void		dev_remove_pack(struct packet_type *pt);
extern int		dev_get(const char *name);
extern struct net_device	*dev_get_by_name(const char *name);
extern struct net_device	*__dev_get_by_name(const char *name);
extern struct net_device	*dev_alloc(const char *name, int *err);
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 int 		register_netdevice_notifier(struct notifier_block *nb);
extern int		unregister_netdevice_notifier(struct notifier_block *nb);
extern int		dev_new_index(void);
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);

typedef int gifconf_func_t(struct net_device * dev, char * 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, 0);
}

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

struct softnet_data
{
	int			throttle;
	int			cng_level;
	int			avg_blog;
	struct sk_buff_head	input_pkt_queue;
	struct list_head	poll_list;
	struct net_device	*output_queue;
	struct sk_buff		*completion_queue;

	struct net_device	blog_dev;	/* Sorry. 8) */
} ____cacheline_aligned;


extern struct softnet_data softnet_data[NR_CPUS];

#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;
		int cpu = smp_processor_id();

		local_irq_save(flags);
		dev->next_sched = softnet_data[cpu].output_queue;
		softnet_data[cpu].output_queue = dev;
		cpu_raise_softirq(cpu, 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)
{
	if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
		__netif_schedule(dev);
}

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

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

static inline int netif_running(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)) {
		int cpu =smp_processor_id();
		unsigned long flags;

		local_irq_save(flags);
		skb->next = softnet_data[cpu].completion_queue;
		softnet_data[cpu].completion_queue = skb;
		cpu_raise_softirq(cpu, 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())
		dev_kfree_skb_irq(skb);
	else
		dev_kfree_skb(skb);
}

#define HAVE_NETIF_RX 1
extern int		netif_rx(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 *);
extern int		dev_change_flags(struct net_device *, unsigned);
extern void		dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);

extern void		dev_init(void);

extern int		netdev_nit;

/* Post buffer to the network code from _non interrupt_ context.
 * see net/core/dev.c for netif_rx description.
 */
static inline int netif_rx_ni(struct sk_buff *skb)
{
       int err = netif_rx(skb);
       if (softirq_pending(smp_processor_id()))
               do_softirq();
       return err;
}

static inline void dev_init_buffers(struct net_device *dev)
{
	/* WILL BE REMOVED IN 2.5.0 */
}

extern int netdev_finish_unregister(struct net_device *dev);

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

#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.
 */

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

extern void __netdev_watchdog_up(struct net_device *dev);

static inline void netif_carrier_on(struct net_device *dev)
{
	clear_bit(__LINK_STATE_NOCARRIER, &dev->state);
	if (netif_running(dev))
		__netdev_watchdog_up(dev);
}

static inline void netif_carrier_off(struct net_device *dev)
{
	set_bit(__LINK_STATE_NOCARRIER, &dev->state);
}

/* 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)

/* 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;
	int cpu = smp_processor_id();

	local_irq_save(flags);
	dev_hold(dev);
	list_add_tail(&dev->poll_list, &softnet_data[cpu].poll_list);
	if (dev->quota < 0)
		dev->quota += dev->weight;
	else
		dev->quota = dev->weight;
	__cpu_raise_softirq(cpu, 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;
		int cpu = smp_processor_id();

		dev->quota += undo;

		local_irq_save(flags);
		list_add_tail(&dev->poll_list, &softnet_data[cpu].poll_list);
		__cpu_raise_softirq(cpu, 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);
	if (!test_bit(__LINK_STATE_RX_SCHED, &dev->state)) BUG();
	list_del(&dev->poll_list);
	clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
	local_irq_restore(flags);
}

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

extern void		ether_setup(struct net_device *dev);
extern void		fddi_setup(struct net_device *dev);
extern void		tr_setup(struct net_device *dev);
extern void		fc_setup(struct net_device *dev);
extern void		fc_freedev(struct net_device *dev);
/* Support for loadable net-drivers */
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);
/* Load a device via the kmod */
extern void		dev_load(const char *name);
extern void		dev_mcast_init(void);
extern int		netdev_register_fc(struct net_device *dev, void (*stimul)(struct net_device *dev));
extern void		netdev_unregister_fc(int bit);
extern int		netdev_max_backlog;
extern int		weight_p;
extern unsigned long	netdev_fc_xoff;
extern atomic_t netdev_dropping;
extern int		netdev_set_master(struct net_device *dev, struct net_device *master);
extern struct sk_buff * skb_checksum_help(struct sk_buff *skb);
#ifdef CONFIG_NET_FASTROUTE
extern int		netdev_fastroute;
extern int		netdev_fastroute_obstacles;
extern void		dev_clear_fastroute(struct net_device *dev);
#endif


#endif /* __KERNEL__ */

#endif	/* _LINUX_DEV_H */