LXR linux/net/netlabel/netlabel

   1/*
   2 * NetLabel Domain Hash Table
   3 *
   4 * This file manages the domain hash table that NetLabel uses to determine
   5 * which network labeling protocol to use for a given domain.  The NetLabel
   6 * system manages static and dynamic label mappings for network protocols such
   7 * as CIPSO and RIPSO.
   8 *
   9 * Author: Paul Moore <paul.moore@hp.com>
  10 *
  11 */
  12
  13/*
  14 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
  15 *
  16 * This program is free software;  you can redistribute it and/or modify
  17 * it under the terms of the GNU General Public License as published by
  18 * the Free Software Foundation; either version 2 of the License, or
  19 * (at your option) any later version.
  20 *
  21 * This program is distributed in the hope that it will be useful,
  22 * but WITHOUT ANY WARRANTY;  without even the implied warranty of
  23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  24 * the GNU General Public License for more details.
  25 *
  26 * You should have received a copy of the GNU General Public License
  27 * along with this program;  if not, write to the Free Software
  28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  29 *
  30 */
  31
  32#ifndef _NETLABEL_DOMAINHASH_H
  33#define _NETLABEL_DOMAINHASH_H
  34
  35#include <linux/types.h>
  36#include <linux/rcupdate.h>
  37#include <linux/list.h>
  38
  39/* Domain hash table size */
  40/* XXX - currently this number is an uneducated guess */
  41#define NETLBL_DOMHSH_BITSIZE       7
  42
  43/* Domain mapping definition struct */
  44struct netlbl_dom_map {
  45        char *domain;
  46        u32 type;
  47        union {
  48                struct cipso_v4_doi *cipsov4;
  49        } type_def;
  50
  51        u32 valid;
  52        struct list_head list;
  53        struct rcu_head rcu;
  54};
  55
  56/* init function */
  57int netlbl_domhsh_init(u32 size);
  58
  59/* Manipulate the domain hash table */
  60int netlbl_domhsh_add(struct netlbl_dom_map *entry,
  61                      struct netlbl_audit *audit_info);
  62int netlbl_domhsh_add_default(struct netlbl_dom_map *entry,
  63                              struct netlbl_audit *audit_info);
  64int netlbl_domhsh_remove(const char *domain, struct netlbl_audit *audit_info);
  65int netlbl_domhsh_remove_default(struct netlbl_audit *audit_info);
  66struct netlbl_dom_map *netlbl_domhsh_getentry(const char *domain);
  67int netlbl_domhsh_walk(u32 *skip_bkt,
  68                     u32 *skip_chain,
  69                     int (*callback) (struct netlbl_dom_map *entry, void *arg),
  70                     void *cb_arg);
  71
  72#endif
  73