mac_data_structures.h

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/**************************************/
/* Rule Set Based Access Control      */
/* Author and (c) 1999-2004:          */
/*   Amon Ott <ao@rsbac.org> */
/* Data structures / MAC              */
/* Last modified: 14/Apr/2004         */
/**************************************/

#ifndef __RSBAC_MAC_DATA_STRUC_H
#define __RSBAC_MAC_DATA_STRUC_H

#include <linux/types.h>
#include <rsbac/aci.h>
#include <rsbac/types.h>

/**********************************************/
/* Capability lists                           */
/**********************************************/

#define RSBAC_MAC_LIST_KEY 626281

#define RSBAC_MAC_P_LIST_VERSION 1
#define RSBAC_MAC_P_LIST_NAME "macptru"

#define RSBAC_MAC_FD_FILENAME "macfdtru."
#define RSBAC_MAC_NR_TRU_FD_LISTS 4
#define RSBAC_MAC_FD_LIST_VERSION 1

/* The list of devices is also a double linked list, so we define list    */
/* items and a list head.                                                 */

struct rsbac_mac_device_list_item_t
    {
      kdev_t                                   id;  /* set to 0 before deletion */
      u_int                                 mount_count;
      rsbac_list_handle_t                   handles[RSBAC_MAC_NR_TRU_FD_LISTS];
      struct rsbac_mac_device_list_item_t   * prev;
      struct rsbac_mac_device_list_item_t   * next;
    };
    
/* To provide consistency we use spinlocks for all list accesses. The     */
/* 'curr' entry is used to avoid repeated lookups for the same item.       */    
    
struct rsbac_mac_device_list_head_t
    {
      struct rsbac_mac_device_list_item_t * head;
      struct rsbac_mac_device_list_item_t * tail;
      struct rsbac_mac_device_list_item_t * curr;
      rwlock_t                               lock;
      u_int                                  count;
    };

#endif

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