/* *		INETPEER - A storage for permanent information about peers * *  Version:	$Id: inetpeer.h,v 1.1.2.1 2002/01/12 07:53:15 davem Exp $ * *  Authors:	Andrey V. Savochkin <saw@msu.ru> */#ifndef _NET_INETPEER_H#define _NET_INETPEER_H#include <linux/types.h>#include <linux/init.h>#include <linux/sched.h>#include <linux/spinlock.h>#include <asm/atomic.h>struct inet_peer{	struct inet_peer	*avl_left, *avl_right;	struct inet_peer	*unused_next, **unused_prevp;	atomic_t		refcnt;	unsigned long		dtime;		/* the time of last use of not						 * referenced entries */	__u32			v4daddr;	/* peer's address */	__u16			avl_height;	__u16			ip_id_count;	/* IP ID for the next packet */	__u32			tcp_ts;	unsigned long		tcp_ts_stamp;};void			inet_initpeers(void) __init;/* can be called with or without local BH being disabled */struct inet_peer	*inet_getpeer(__u32 daddr, int create);extern spinlock_t inet_peer_unused_lock;extern struct inet_peer *inet_peer_unused_head;extern struct inet_peer **inet_peer_unused_tailp;/* can be called from BH context or outside */static inline void	inet_putpeer(struct inet_peer *p){	spin_lock_bh(&inet_peer_unused_lock);	if (atomic_dec_and_test(&p->refcnt)) {		p->unused_prevp = inet_peer_unused_tailp;		p->unused_next = NULL;		*inet_peer_unused_tailp = p;		inet_peer_unused_tailp = &p->unused_next;		p->dtime = jiffies;	}	spin_unlock_bh(&inet_peer_unused_lock);}extern spinlock_t inet_peer_idlock;/* can be called with or without local BH being disabled */static inline __u16	inet_getid(struct inet_peer *p){	__u16 id;	spin_lock_bh(&inet_peer_idlock);	id = p->ip_id_count++;	spin_unlock_bh(&inet_peer_idlock);	return id;}#endif /* _NET_INETPEER_H */