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TOMOYO Linux Cross Reference
Linux/net/netlabel/netlabel_domainhash.h

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  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@paul-moore.com>
 10  *
 11  */
 12 
 13 /*
 14  * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008
 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, see <http://www.gnu.org/licenses/>.
 28  *
 29  */
 30 
 31 #ifndef _NETLABEL_DOMAINHASH_H
 32 #define _NETLABEL_DOMAINHASH_H
 33 
 34 #include <linux/types.h>
 35 #include <linux/rcupdate.h>
 36 #include <linux/list.h>
 37 
 38 #include "netlabel_addrlist.h"
 39 
 40 /* Domain hash table size */
 41 /* XXX - currently this number is an uneducated guess */
 42 #define NETLBL_DOMHSH_BITSIZE       7
 43 
 44 /* Domain mapping definition structures */
 45 struct netlbl_domaddr_map {
 46         struct list_head list4;
 47         struct list_head list6;
 48 };
 49 struct netlbl_dommap_def {
 50         u32 type;
 51         union {
 52                 struct netlbl_domaddr_map *addrsel;
 53                 struct cipso_v4_doi *cipso;
 54                 struct calipso_doi *calipso;
 55         };
 56 };
 57 #define netlbl_domhsh_addr4_entry(iter) \
 58         container_of(iter, struct netlbl_domaddr4_map, list)
 59 struct netlbl_domaddr4_map {
 60         struct netlbl_dommap_def def;
 61 
 62         struct netlbl_af4list list;
 63 };
 64 #define netlbl_domhsh_addr6_entry(iter) \
 65         container_of(iter, struct netlbl_domaddr6_map, list)
 66 struct netlbl_domaddr6_map {
 67         struct netlbl_dommap_def def;
 68 
 69         struct netlbl_af6list list;
 70 };
 71 
 72 struct netlbl_dom_map {
 73         char *domain;
 74         u16 family;
 75         struct netlbl_dommap_def def;
 76 
 77         u32 valid;
 78         struct list_head list;
 79         struct rcu_head rcu;
 80 };
 81 
 82 /* init function */
 83 int netlbl_domhsh_init(u32 size);
 84 
 85 /* Manipulate the domain hash table */
 86 int netlbl_domhsh_add(struct netlbl_dom_map *entry,
 87                       struct netlbl_audit *audit_info);
 88 int netlbl_domhsh_add_default(struct netlbl_dom_map *entry,
 89                               struct netlbl_audit *audit_info);
 90 int netlbl_domhsh_remove_entry(struct netlbl_dom_map *entry,
 91                                struct netlbl_audit *audit_info);
 92 int netlbl_domhsh_remove_af4(const char *domain,
 93                              const struct in_addr *addr,
 94                              const struct in_addr *mask,
 95                              struct netlbl_audit *audit_info);
 96 int netlbl_domhsh_remove_af6(const char *domain,
 97                              const struct in6_addr *addr,
 98                              const struct in6_addr *mask,
 99                              struct netlbl_audit *audit_info);
100 int netlbl_domhsh_remove(const char *domain, u16 family,
101                          struct netlbl_audit *audit_info);
102 int netlbl_domhsh_remove_default(u16 family, struct netlbl_audit *audit_info);
103 struct netlbl_dom_map *netlbl_domhsh_getentry(const char *domain, u16 family);
104 struct netlbl_dommap_def *netlbl_domhsh_getentry_af4(const char *domain,
105                                                      __be32 addr);
106 #if IS_ENABLED(CONFIG_IPV6)
107 struct netlbl_dommap_def *netlbl_domhsh_getentry_af6(const char *domain,
108                                                    const struct in6_addr *addr);
109 int netlbl_domhsh_remove_af6(const char *domain,
110                              const struct in6_addr *addr,
111                              const struct in6_addr *mask,
112                              struct netlbl_audit *audit_info);
113 #endif /* IPv6 */
114 
115 int netlbl_domhsh_walk(u32 *skip_bkt,
116                      u32 *skip_chain,
117                      int (*callback) (struct netlbl_dom_map *entry, void *arg),
118                      void *cb_arg);
119 
120 #endif
121 

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