ipn/ipn_hash.h

   1 #ifndef _IPN_HASH_H
   2 #define _IPN_HASH_H
   3 /*
   4  * Inter process networking (virtual distributed ethernet) module
   5  * Hash table for Ethernet management
   6  *  (part of the View-OS project: wiki.virtualsquare.org)
   7  *
   8  * Copyright (C) 2007   Renzo Davoli (renzo@cs.unibo.it)
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  Due to this file being licensed under the GPL there is controversy over
  16  *  whether this permits you to write a module that #includes this file
  17  *  without placing your module under the GPL.  Please consult a lawyer for
  18  *  advice before doing this.
  19  *
  20  */
  21
  22 #include <linux/init.h>
  23 #include <linux/module.h>
  24 #include <linux/types.h>
  25 #include <linux/timer.h>
  26 #include <linux/list.h>
  27 #include <linux/jiffies.h>
  28
  29 struct ipn_hash {
  30         struct hlist_head *hashtable;
  31         struct list_head lrulist;
  32         int mask;  /* size-1 where size must be a power of 2 */
  33         unsigned long timeout;
  34         spinlock_t hashlock;
  35         struct timer_list hashtimer;
  36 };
  37
  38 int ipn_hash_new(struct ipn_hash *vdeh,int size,unsigned long timeout);
  39 void ipn_hash_flush(struct ipn_hash *vdeh);
  40 void ipn_hash_flush_key(struct ipn_hash *vdeh,u16 *key,u16 *vlan);
  41 void ipn_hash_flush_port(struct ipn_hash *vdeh,int port);
  42 void ipn_hash_free(struct ipn_hash *vdeh);
  43 void ipn_hash_add(struct ipn_hash *vdeh,u16 *key,u16 vlan,int port);
  44 int ipn_hash_find(struct ipn_hash *vdeh,u16 *key,u16 vlan);
  45 int ipn_hash_init(void);
  46 void ipn_hash_fini(void);
  47 #endif