[net-next-2.6.git] / include / net / neighbour.h

#ifndef _NET_NEIGHBOUR_H
#define _NET_NEIGHBOUR_H

/*
 *	Generic neighbour manipulation
 *
 *	Authors:
 *	Pedro Roque		<roque@di.fc.ul.pt>
 *	Alexey Kuznetsov	<kuznet@ms2.inr.ac.ru>
 *
 * 	Changes:
 *
 *	Harald Welte:		<laforge@gnumonks.org>
 *		- Add neighbour cache statistics like rtstat
 */

/* The following flags & states are exported to user space,
   so that they should be moved to include/linux/ directory.
 */

/*
 *	Neighbor Cache Entry Flags
 */

#define NTF_PROXY	0x08	/* == ATF_PUBL */
#define NTF_ROUTER	0x80

/*
 *	Neighbor Cache Entry States.
 */

#define NUD_INCOMPLETE	0x01
#define NUD_REACHABLE	0x02
#define NUD_STALE	0x04
#define NUD_DELAY	0x08
#define NUD_PROBE	0x10
#define NUD_FAILED	0x20

/* Dummy states */
#define NUD_NOARP	0x40
#define NUD_PERMANENT	0x80
#define NUD_NONE	0x00

/* NUD_NOARP & NUD_PERMANENT are pseudostates, they never change
   and make no address resolution or NUD.
   NUD_PERMANENT is also cannot be deleted by garbage collectors.
 */

#ifdef __KERNEL__

#include <asm/atomic.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/rcupdate.h>
#include <linux/seq_file.h>

#include <linux/err.h>
#include <linux/sysctl.h>

#define NUD_IN_TIMER	(NUD_INCOMPLETE|NUD_REACHABLE|NUD_DELAY|NUD_PROBE)
#define NUD_VALID	(NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE|NUD_PROBE|NUD_STALE|NUD_DELAY)
#define NUD_CONNECTED	(NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE)

struct neighbour;

struct neigh_parms
{
	struct net_device *dev;
	struct neigh_parms *next;
	int	(*neigh_setup)(struct neighbour *);
	void	(*neigh_destructor)(struct neighbour *);
	struct neigh_table *tbl;

	void	*sysctl_table;

	int dead;
	atomic_t refcnt;
	struct rcu_head rcu_head;

	int	base_reachable_time;
	int	retrans_time;
	int	gc_staletime;
	int	reachable_time;
	int	delay_probe_time;

	int	queue_len;
	int	ucast_probes;
	int	app_probes;
	int	mcast_probes;
	int	anycast_delay;
	int	proxy_delay;
	int	proxy_qlen;
	int	locktime;
};

struct neigh_statistics
{
	unsigned long allocs;		/* number of allocated neighs */
	unsigned long destroys;		/* number of destroyed neighs */
	unsigned long hash_grows;	/* number of hash resizes */

	unsigned long res_failed;	/* nomber of failed resolutions */

	unsigned long lookups;		/* number of lookups */
	unsigned long hits;		/* number of hits (among lookups) */

	unsigned long rcv_probes_mcast;	/* number of received mcast ipv6 */
	unsigned long rcv_probes_ucast; /* number of received ucast ipv6 */

	unsigned long periodic_gc_runs;	/* number of periodic GC runs */
	unsigned long forced_gc_runs;	/* number of forced GC runs */
};

#define NEIGH_CACHE_STAT_INC(tbl, field)				\
	do {								\
		preempt_disable();					\
		(per_cpu_ptr((tbl)->stats, smp_processor_id())->field)++; \
		preempt_enable();					\
	} while (0)

struct neighbour
{
	struct neighbour	*next;
	struct neigh_table	*tbl;
	struct neigh_parms	*parms;
	struct net_device		*dev;
	unsigned long		used;
	unsigned long		confirmed;
	unsigned long		updated;
	__u8			flags;
	__u8			nud_state;
	__u8			type;
	__u8			dead;
	atomic_t		probes;
	rwlock_t		lock;
	unsigned char		ha[(MAX_ADDR_LEN+sizeof(unsigned long)-1)&~(sizeof(unsigned long)-1)];
	struct hh_cache		*hh;
	atomic_t		refcnt;
	int			(*output)(struct sk_buff *skb);
	struct sk_buff_head	arp_queue;
	struct timer_list	timer;
	struct neigh_ops	*ops;
	u8			primary_key[0];
};

struct neigh_ops
{
	int			family;
	void			(*solicit)(struct neighbour *, struct sk_buff*);
	void			(*error_report)(struct neighbour *, struct sk_buff*);
	int			(*output)(struct sk_buff*);
	int			(*connected_output)(struct sk_buff*);
	int			(*hh_output)(struct sk_buff*);
	int			(*queue_xmit)(struct sk_buff*);
};

struct pneigh_entry
{
	struct pneigh_entry	*next;
	struct net_device		*dev;
	u8			key[0];
};

/*
 *	neighbour table manipulation
 */


struct neigh_table
{
	struct neigh_table	*next;
	int			family;
	int			entry_size;
	int			key_len;
	__u32			(*hash)(const void *pkey, const struct net_device *);
	int			(*constructor)(struct neighbour *);
	int			(*pconstructor)(struct pneigh_entry *);
	void			(*pdestructor)(struct pneigh_entry *);
	void			(*proxy_redo)(struct sk_buff *skb);
	char			*id;
	struct neigh_parms	parms;
	/* HACK. gc_* shoul follow parms without a gap! */
	int			gc_interval;
	int			gc_thresh1;
	int			gc_thresh2;
	int			gc_thresh3;
	unsigned long		last_flush;
	struct timer_list 	gc_timer;
	struct timer_list 	proxy_timer;
	struct sk_buff_head	proxy_queue;
	atomic_t		entries;
	rwlock_t		lock;
	unsigned long		last_rand;
	kmem_cache_t		*kmem_cachep;
	struct neigh_statistics	*stats;
	struct neighbour	**hash_buckets;
	unsigned int		hash_mask;
	__u32			hash_rnd;
	unsigned int		hash_chain_gc;
	struct pneigh_entry	**phash_buckets;
#ifdef CONFIG_PROC_FS
	struct proc_dir_entry	*pde;
#endif
};

/* flags for neigh_update() */
#define NEIGH_UPDATE_F_OVERRIDE			0x00000001
#define NEIGH_UPDATE_F_WEAK_OVERRIDE		0x00000002
#define NEIGH_UPDATE_F_OVERRIDE_ISROUTER	0x00000004
#define NEIGH_UPDATE_F_ISROUTER			0x40000000
#define NEIGH_UPDATE_F_ADMIN			0x80000000

extern void			neigh_table_init(struct neigh_table *tbl);
extern void			neigh_table_init_no_netlink(struct neigh_table *tbl);
extern int			neigh_table_clear(struct neigh_table *tbl);
extern struct neighbour *	neigh_lookup(struct neigh_table *tbl,
					     const void *pkey,
					     struct net_device *dev);
extern struct neighbour *	neigh_lookup_nodev(struct neigh_table *tbl,
						   const void *pkey);
extern struct neighbour *	neigh_create(struct neigh_table *tbl,
					     const void *pkey,
					     struct net_device *dev);
extern void			neigh_destroy(struct neighbour *neigh);
extern int			__neigh_event_send(struct neighbour *neigh, struct sk_buff *skb);
extern int			neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new, 
					     u32 flags);
extern void			neigh_changeaddr(struct neigh_table *tbl, struct net_device *dev);
extern int			neigh_ifdown(struct neigh_table *tbl, struct net_device *dev);
extern int			neigh_resolve_output(struct sk_buff *skb);
extern int			neigh_connected_output(struct sk_buff *skb);
extern int			neigh_compat_output(struct sk_buff *skb);
extern struct neighbour 	*neigh_event_ns(struct neigh_table *tbl,
						u8 *lladdr, void *saddr,
						struct net_device *dev);

extern struct neigh_parms	*neigh_parms_alloc(struct net_device *dev, struct neigh_table *tbl);
extern void			neigh_parms_release(struct neigh_table *tbl, struct neigh_parms *parms);
extern void			neigh_parms_destroy(struct neigh_parms *parms);
extern unsigned long		neigh_rand_reach_time(unsigned long base);

extern void			pneigh_enqueue(struct neigh_table *tbl, struct neigh_parms *p,
					       struct sk_buff *skb);
extern struct pneigh_entry	*pneigh_lookup(struct neigh_table *tbl, const void *key, struct net_device *dev, int creat);
extern int			pneigh_delete(struct neigh_table *tbl, const void *key, struct net_device *dev);

struct netlink_callback;
struct nlmsghdr;
extern int neigh_dump_info(struct sk_buff *skb, struct netlink_callback *cb);
extern int neigh_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
extern int neigh_delete(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
extern void neigh_app_ns(struct neighbour *n);

extern int neightbl_dump_info(struct sk_buff *skb, struct netlink_callback *cb);
extern int neightbl_set(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);

extern void neigh_for_each(struct neigh_table *tbl, void (*cb)(struct neighbour *, void *), void *cookie);
extern void __neigh_for_each_release(struct neigh_table *tbl, int (*cb)(struct neighbour *));
extern void pneigh_for_each(struct neigh_table *tbl, void (*cb)(struct pneigh_entry *));

struct neigh_seq_state {
	struct neigh_table *tbl;
	void *(*neigh_sub_iter)(struct neigh_seq_state *state,
				struct neighbour *n, loff_t *pos);
	unsigned int bucket;
	unsigned int flags;
#define NEIGH_SEQ_NEIGH_ONLY	0x00000001
#define NEIGH_SEQ_IS_PNEIGH	0x00000002
#define NEIGH_SEQ_SKIP_NOARP	0x00000004
};
extern void *neigh_seq_start(struct seq_file *, loff_t *, struct neigh_table *, unsigned int);
extern void *neigh_seq_next(struct seq_file *, void *, loff_t *);
extern void neigh_seq_stop(struct seq_file *, void *);

extern int			neigh_sysctl_register(struct net_device *dev, 
						      struct neigh_parms *p,
						      int p_id, int pdev_id,
						      char *p_name,
						      proc_handler *proc_handler,
						      ctl_handler *strategy);
extern void			neigh_sysctl_unregister(struct neigh_parms *p);

static inline void __neigh_parms_put(struct neigh_parms *parms)
{
	atomic_dec(&parms->refcnt);
}

static inline void neigh_parms_put(struct neigh_parms *parms)
{
	if (atomic_dec_and_test(&parms->refcnt))
		neigh_parms_destroy(parms);
}

static inline struct neigh_parms *neigh_parms_clone(struct neigh_parms *parms)
{
	atomic_inc(&parms->refcnt);
	return parms;
}

/*
 *	Neighbour references
 */

static inline void neigh_release(struct neighbour *neigh)
{
	if (atomic_dec_and_test(&neigh->refcnt))
		neigh_destroy(neigh);
}

static inline struct neighbour * neigh_clone(struct neighbour *neigh)
{
	if (neigh)
		atomic_inc(&neigh->refcnt);
	return neigh;
}

#define neigh_hold(n)	atomic_inc(&(n)->refcnt)

static inline void neigh_confirm(struct neighbour *neigh)
{
	if (neigh)
		neigh->confirmed = jiffies;
}

static inline int neigh_is_connected(struct neighbour *neigh)
{
	return neigh->nud_state&NUD_CONNECTED;
}

static inline int neigh_is_valid(struct neighbour *neigh)
{
	return neigh->nud_state&NUD_VALID;
}

static inline int neigh_event_send(struct neighbour *neigh, struct sk_buff *skb)
{
	neigh->used = jiffies;
	if (!(neigh->nud_state&(NUD_CONNECTED|NUD_DELAY|NUD_PROBE)))
		return __neigh_event_send(neigh, skb);
	return 0;
}

static inline struct neighbour *
__neigh_lookup(struct neigh_table *tbl, const void *pkey, struct net_device *dev, int creat)
{
	struct neighbour *n = neigh_lookup(tbl, pkey, dev);

	if (n || !creat)
		return n;

	n = neigh_create(tbl, pkey, dev);
	return IS_ERR(n) ? NULL : n;
}

static inline struct neighbour *
__neigh_lookup_errno(struct neigh_table *tbl, const void *pkey,
  struct net_device *dev)
{
	struct neighbour *n = neigh_lookup(tbl, pkey, dev);

	if (n)
		return n;

	return neigh_create(tbl, pkey, dev);
}

struct neighbour_cb {
	unsigned long sched_next;
	unsigned int flags;
};

#define LOCALLY_ENQUEUED 0x1

#define NEIGH_CB(skb)	((struct neighbour_cb *)(skb)->cb)

#endif
#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef _NET_NEIGHBOUR_H
	2	#define _NET_NEIGHBOUR_H
	3
	4	/*
	5	* Generic neighbour manipulation
	6	*
	7	* Authors:
	8	* Pedro Roque <roque@di.fc.ul.pt>
	9	* Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
	10	*
	11	* Changes:
	12	*
	13	* Harald Welte: <laforge@gnumonks.org>
	14	* - Add neighbour cache statistics like rtstat
	15	*/
	16
	17	/* The following flags & states are exported to user space,
	18	so that they should be moved to include/linux/ directory.
	19	*/
	20
	21	/*
	22	* Neighbor Cache Entry Flags
	23	*/
	24
	25	#define NTF_PROXY 0x08 /* == ATF_PUBL */
	26	#define NTF_ROUTER 0x80
	27
	28	/*
	29	* Neighbor Cache Entry States.
	30	*/
	31
	32	#define NUD_INCOMPLETE 0x01
	33	#define NUD_REACHABLE 0x02
	34	#define NUD_STALE 0x04
	35	#define NUD_DELAY 0x08
	36	#define NUD_PROBE 0x10
	37	#define NUD_FAILED 0x20
	38
	39	/* Dummy states */
	40	#define NUD_NOARP 0x40
	41	#define NUD_PERMANENT 0x80
	42	#define NUD_NONE 0x00
	43
	44	/* NUD_NOARP & NUD_PERMANENT are pseudostates, they never change
	45	and make no address resolution or NUD.
	46	NUD_PERMANENT is also cannot be deleted by garbage collectors.
	47	*/
	48
	49	#ifdef __KERNEL__
	50
	51	#include <asm/atomic.h>
1da177e4	52	#include <linux/netdevice.h>
14c85021	53	#include <linux/skbuff.h>
1da177e4 LT	54	#include <linux/rcupdate.h>
	55	#include <linux/seq_file.h>
	56
	57	#include <linux/err.h>
	58	#include <linux/sysctl.h>
	59
	60	#define NUD_IN_TIMER (NUD_INCOMPLETE\|NUD_REACHABLE\|NUD_DELAY\|NUD_PROBE)
	61	#define NUD_VALID (NUD_PERMANENT\|NUD_NOARP\|NUD_REACHABLE\|NUD_PROBE\|NUD_STALE\|NUD_DELAY)
	62	#define NUD_CONNECTED (NUD_PERMANENT\|NUD_NOARP\|NUD_REACHABLE)
	63
	64	struct neighbour;
	65
	66	struct neigh_parms
	67	{
c7fb64db	68	struct net_device *dev;
1da177e4 LT	69	struct neigh_parms *next;
1da177e4 LT	70	int (neigh_setup)(struct neighbour );
c5ecd62c	71	void (neigh_destructor)(struct neighbour );
1da177e4	72	struct neigh_table *tbl;
1da177e4 LT	73
	74	void *sysctl_table;
	75
	76	int dead;
	77	atomic_t refcnt;
	78	struct rcu_head rcu_head;
	79
	80	int base_reachable_time;
	81	int retrans_time;
	82	int gc_staletime;
	83	int reachable_time;
	84	int delay_probe_time;
	85
	86	int queue_len;
	87	int ucast_probes;
	88	int app_probes;
	89	int mcast_probes;
	90	int anycast_delay;
	91	int proxy_delay;
	92	int proxy_qlen;
	93	int locktime;
	94	};
	95
	96	struct neigh_statistics
	97	{
	98	unsigned long allocs; /* number of allocated neighs */
	99	unsigned long destroys; /* number of destroyed neighs */
	100	unsigned long hash_grows; /* number of hash resizes */
	101
	102	unsigned long res_failed; /* nomber of failed resolutions */
	103
	104	unsigned long lookups; /* number of lookups */
	105	unsigned long hits; /* number of hits (among lookups) */
	106
	107	unsigned long rcv_probes_mcast; /* number of received mcast ipv6 */
	108	unsigned long rcv_probes_ucast; /* number of received ucast ipv6 */
	109
	110	unsigned long periodic_gc_runs; /* number of periodic GC runs */
	111	unsigned long forced_gc_runs; /* number of forced GC runs */
	112	};
	113
	114	#define NEIGH_CACHE_STAT_INC(tbl, field) \
	115	do { \
	116	preempt_disable(); \
	117	(per_cpu_ptr((tbl)->stats, smp_processor_id())->field)++; \
	118	preempt_enable(); \
	119	} while (0)
	120
	121	struct neighbour
	122	{
	123	struct neighbour *next;
	124	struct neigh_table *tbl;
	125	struct neigh_parms *parms;
	126	struct net_device *dev;
	127	unsigned long used;
	128	unsigned long confirmed;
	129	unsigned long updated;
	130	__u8 flags;
	131	__u8 nud_state;
	132	__u8 type;
	133	__u8 dead;
	134	atomic_t probes;
	135	rwlock_t lock;
	136	unsigned char ha[(MAX_ADDR_LEN+sizeof(unsigned long)-1)&~(sizeof(unsigned long)-1)];
137	struct hh_cache *hh;
138	atomic_t refcnt;
139	int (output)(struct sk_buff skb);
140	struct sk_buff_head arp_queue;
141	struct timer_list timer;
142	struct neigh_ops *ops;
143	u8 primary_key[0];
144	};
145
146	struct neigh_ops
147	{
148	int family;
1da177e4 LT	149	void (solicit)(struct neighbour , struct sk_buff*);
	150	void (error_report)(struct neighbour , struct sk_buff*);
	151	int (output)(struct sk_buff);
	152	int (connected_output)(struct sk_buff);
	153	int (hh_output)(struct sk_buff);
	154	int (queue_xmit)(struct sk_buff);
	155	};
	156
	157	struct pneigh_entry
	158	{
	159	struct pneigh_entry *next;
	160	struct net_device *dev;
	161	u8 key[0];
	162	};
	163
	164	/*
	165	* neighbour table manipulation
	166	*/
	167
	168
	169	struct neigh_table
	170	{
	171	struct neigh_table *next;
	172	int family;
	173	int entry_size;
	174	int key_len;
	175	__u32 (hash)(const void pkey, const struct net_device *);
	176	int (constructor)(struct neighbour );
	177	int (pconstructor)(struct pneigh_entry );
	178	void (pdestructor)(struct pneigh_entry );
	179	void (proxy_redo)(struct sk_buff skb);
	180	char *id;
	181	struct neigh_parms parms;
	182	/* HACK. gc_* shoul follow parms without a gap! */
	183	int gc_interval;
	184	int gc_thresh1;
	185	int gc_thresh2;
	186	int gc_thresh3;
	187	unsigned long last_flush;
	188	struct timer_list gc_timer;
	189	struct timer_list proxy_timer;
	190	struct sk_buff_head proxy_queue;
	191	atomic_t entries;
	192	rwlock_t lock;
	193	unsigned long last_rand;
1da177e4 LT	194	kmem_cache_t *kmem_cachep;
	195	struct neigh_statistics *stats;
	196	struct neighbour **hash_buckets;
	197	unsigned int hash_mask;
	198	__u32 hash_rnd;
	199	unsigned int hash_chain_gc;
	200	struct pneigh_entry **phash_buckets;
	201	#ifdef CONFIG_PROC_FS
	202	struct proc_dir_entry *pde;
	203	#endif
	204	};
	205
	206	/* flags for neigh_update() */
	207	#define NEIGH_UPDATE_F_OVERRIDE 0x00000001
	208	#define NEIGH_UPDATE_F_WEAK_OVERRIDE 0x00000002
	209	#define NEIGH_UPDATE_F_OVERRIDE_ISROUTER 0x00000004
	210	#define NEIGH_UPDATE_F_ISROUTER 0x40000000
	211	#define NEIGH_UPDATE_F_ADMIN 0x80000000
	212
	213	extern void neigh_table_init(struct neigh_table *tbl);
bd89efc5	214	extern void neigh_table_init_no_netlink(struct neigh_table *tbl);
1da177e4 LT	215	extern int neigh_table_clear(struct neigh_table *tbl);
	216	extern struct neighbour * neigh_lookup(struct neigh_table *tbl,
	217	const void *pkey,
	218	struct net_device *dev);
	219	extern struct neighbour * neigh_lookup_nodev(struct neigh_table *tbl,
	220	const void *pkey);
	221	extern struct neighbour * neigh_create(struct neigh_table *tbl,
	222	const void *pkey,
	223	struct net_device *dev);
	224	extern void neigh_destroy(struct neighbour *neigh);
	225	extern int __neigh_event_send(struct neighbour neigh, struct sk_buff skb);
	226	extern int neigh_update(struct neighbour neigh, const u8 lladdr, u8 new,
	227	u32 flags);
	228	extern void neigh_changeaddr(struct neigh_table tbl, struct net_device dev);
	229	extern int neigh_ifdown(struct neigh_table tbl, struct net_device dev);
	230	extern int neigh_resolve_output(struct sk_buff *skb);
	231	extern int neigh_connected_output(struct sk_buff *skb);
	232	extern int neigh_compat_output(struct sk_buff *skb);
	233	extern struct neighbour neigh_event_ns(struct neigh_table tbl,
	234	u8 lladdr, void saddr,
	235	struct net_device *dev);
	236
	237	extern struct neigh_parms neigh_parms_alloc(struct net_device dev, struct neigh_table *tbl);
	238	extern void neigh_parms_release(struct neigh_table tbl, struct neigh_parms parms);
	239	extern void neigh_parms_destroy(struct neigh_parms *parms);
	240	extern unsigned long neigh_rand_reach_time(unsigned long base);
	241
	242	extern void pneigh_enqueue(struct neigh_table tbl, struct neigh_parms p,
	243	struct sk_buff *skb);
	244	extern struct pneigh_entry pneigh_lookup(struct neigh_table tbl, const void key, struct net_device dev, int creat);
	245	extern int pneigh_delete(struct neigh_table tbl, const void key, struct net_device *dev);
	246
	247	struct netlink_callback;
	248	struct nlmsghdr;
	249	extern int neigh_dump_info(struct sk_buff skb, struct netlink_callback cb);
	250	extern int neigh_add(struct sk_buff skb, struct nlmsghdr nlh, void *arg);
	251	extern int neigh_delete(struct sk_buff skb, struct nlmsghdr nlh, void *arg);
	252	extern void neigh_app_ns(struct neighbour *n);
	253
c7fb64db TG	254	extern int neightbl_dump_info(struct sk_buff skb, struct netlink_callback cb);
	255	extern int neightbl_set(struct sk_buff skb, struct nlmsghdr nlh, void *arg);
	256
1da177e4 LT	257	extern void neigh_for_each(struct neigh_table tbl, void (cb)(struct neighbour , void ), void *cookie);
	258	extern void __neigh_for_each_release(struct neigh_table tbl, int (cb)(struct neighbour *));
	259	extern void pneigh_for_each(struct neigh_table tbl, void (cb)(struct pneigh_entry *));
	260
	261	struct neigh_seq_state {
	262	struct neigh_table *tbl;
	263	void (neigh_sub_iter)(struct neigh_seq_state *state,
	264	struct neighbour n, loff_t pos);
	265	unsigned int bucket;
	266	unsigned int flags;
	267	#define NEIGH_SEQ_NEIGH_ONLY 0x00000001
	268	#define NEIGH_SEQ_IS_PNEIGH 0x00000002
	269	#define NEIGH_SEQ_SKIP_NOARP 0x00000004
	270	};
	271	extern void neigh_seq_start(struct seq_file , loff_t , struct neigh_table , unsigned int);
	272	extern void neigh_seq_next(struct seq_file , void , loff_t );
	273	extern void neigh_seq_stop(struct seq_file , void );
	274
	275	extern int neigh_sysctl_register(struct net_device *dev,
	276	struct neigh_parms *p,
	277	int p_id, int pdev_id,
	278	char *p_name,
	279	proc_handler *proc_handler,
	280	ctl_handler *strategy);
	281	extern void neigh_sysctl_unregister(struct neigh_parms *p);
	282
	283	static inline void __neigh_parms_put(struct neigh_parms *parms)
	284	{
	285	atomic_dec(&parms->refcnt);
	286	}
	287
	288	static inline void neigh_parms_put(struct neigh_parms *parms)
	289	{
	290	if (atomic_dec_and_test(&parms->refcnt))
	291	neigh_parms_destroy(parms);
	292	}
	293
	294	static inline struct neigh_parms neigh_parms_clone(struct neigh_parms parms)
	295	{
	296	atomic_inc(&parms->refcnt);
	297	return parms;
	298	}
	299
	300	/*
	301	* Neighbour references
	302	*/
	303
	304	static inline void neigh_release(struct neighbour *neigh)
	305	{
	306	if (atomic_dec_and_test(&neigh->refcnt))
	307	neigh_destroy(neigh);
	308	}
	309
	310	static inline struct neighbour * neigh_clone(struct neighbour *neigh)
	311	{
	312	if (neigh)
	313	atomic_inc(&neigh->refcnt);
	314	return neigh;
	315	}
	316
	317	#define neigh_hold(n) atomic_inc(&(n)->refcnt)
	318
	319	static inline void neigh_confirm(struct neighbour *neigh)
	320	{
321	if (neigh)
322	neigh->confirmed = jiffies;
323	}
324
325	static inline int neigh_is_connected(struct neighbour *neigh)
326	{
327	return neigh->nud_state&NUD_CONNECTED;
328	}
329
330	static inline int neigh_is_valid(struct neighbour *neigh)
331	{
332	return neigh->nud_state&NUD_VALID;
333	}
334
335	static inline int neigh_event_send(struct neighbour neigh, struct sk_buff skb)
336	{
337	neigh->used = jiffies;
338	if (!(neigh->nud_state&(NUD_CONNECTED\|NUD_DELAY\|NUD_PROBE)))
339	return __neigh_event_send(neigh, skb);
340	return 0;
341	}
342
343	static inline struct neighbour *
344	__neigh_lookup(struct neigh_table tbl, const void pkey, struct net_device *dev, int creat)
345	{
346	struct neighbour *n = neigh_lookup(tbl, pkey, dev);
347
348	if (n \|\| !creat)
349	return n;
350
351	n = neigh_create(tbl, pkey, dev);
352	return IS_ERR(n) ? NULL : n;
353	}
354
355	static inline struct neighbour *
356	__neigh_lookup_errno(struct neigh_table tbl, const void pkey,
357	struct net_device *dev)
358	{
359	struct neighbour *n = neigh_lookup(tbl, pkey, dev);
360
361	if (n)
362	return n;
363
364	return neigh_create(tbl, pkey, dev);
365	}
366
a61bbcf2 PM	367	struct neighbour_cb {
	368	unsigned long sched_next;
	369	unsigned int flags;
	370	};
	371
	372	#define LOCALLY_ENQUEUED 0x1
	373
	374	#define NEIGH_CB(skb) ((struct neighbour_cb *)(skb)->cb)
1da177e4 LT	375
	376	#endif
	377	#endif
	378
	379