root/include/net/inetpeer.h

INCLUDED FROM

DEFINITIONS

1. inet_initpeers

/*
 *              INETPEER - A storage for permanent information about peers
 *
 *  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/jiffies.h>
#include <linux/spinlock.h>
#include <asm/atomic.h>

struct inet_peer
{
        /* group together avl_left,avl_right,v4daddr to speedup lookups */
        struct inet_peer        *avl_left, *avl_right;
        __be32                  v4daddr;        /* peer's address */
        __u16                   avl_height;
        __u16                   ip_id_count;    /* IP ID for the next packet */
        struct list_head        unused;
        __u32                   dtime;          /* the time of last use of not
                                                 * referenced entries */
        atomic_t                refcnt;
        atomic_t                rid;            /* Frag reception counter */
        __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(__be32 daddr, int create);

/* can be called from BH context or outside */
extern void inet_putpeer(struct inet_peer *p);

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, int more)
{
        __u16 id;

        spin_lock_bh(&inet_peer_idlock);
        id = p->ip_id_count;
        p->ip_id_count += 1 + more;
        spin_unlock_bh(&inet_peer_idlock);
        return id;
}

#endif /* _NET_INETPEER_H */