LXR linux/net/netlabel/netlabel

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * NetLabel Domain Hash Table
   4 *
   5 * This file manages the domain hash table that NetLabel uses to determine
   6 * which network labeling protocol to use for a given domain.  The NetLabel
   7 * system manages static and dynamic label mappings for network protocols such
   8 * as CIPSO and RIPSO.
   9 *
  10 * Author: Paul Moore <paul@paul-moore.com>
  11 */
  12
  13/*
  14 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008
  15 */
  16
  17#ifndef _NETLABEL_DOMAINHASH_H
  18#define _NETLABEL_DOMAINHASH_H
  19
  20#include <linux/types.h>
  21#include <linux/rcupdate.h>
  22#include <linux/list.h>
  23
  24#include "netlabel_addrlist.h"
  25
  26/* Domain hash table size */
  27/* XXX - currently this number is an uneducated guess */
  28#define NETLBL_DOMHSH_BITSIZE       7
  29
  30/* Domain mapping definition structures */
  31struct netlbl_domaddr_map {
  32        struct list_head list4;
  33        struct list_head list6;
  34};
  35struct netlbl_dommap_def {
  36        u32 type;
  37        union {
  38                struct netlbl_domaddr_map *addrsel;
  39                struct cipso_v4_doi *cipso;
  40                struct calipso_doi *calipso;
  41        };
  42};
  43#define netlbl_domhsh_addr4_entry(iter) \
  44        container_of(iter, struct netlbl_domaddr4_map, list)
  45struct netlbl_domaddr4_map {
  46        struct netlbl_dommap_def def;
  47
  48        struct netlbl_af4list list;
  49};
  50#define netlbl_domhsh_addr6_entry(iter) \
  51        container_of(iter, struct netlbl_domaddr6_map, list)
  52struct netlbl_domaddr6_map {
  53        struct netlbl_dommap_def def;
  54
  55        struct netlbl_af6list list;
  56};
  57
  58struct netlbl_dom_map {
  59        char *domain;
  60        u16 family;
  61        struct netlbl_dommap_def def;
  62
  63        u32 valid;
  64        struct list_head list;
  65        struct rcu_head rcu;
  66};
  67
  68/* init function */
  69int netlbl_domhsh_init(u32 size);
  70
  71/* Manipulate the domain hash table */
  72int netlbl_domhsh_add(struct netlbl_dom_map *entry,
  73                      struct netlbl_audit *audit_info);
  74int netlbl_domhsh_add_default(struct netlbl_dom_map *entry,
  75                              struct netlbl_audit *audit_info);
  76int netlbl_domhsh_remove_entry(struct netlbl_dom_map *entry,
  77                               struct netlbl_audit *audit_info);
  78int netlbl_domhsh_remove_af4(const char *domain,
  79                             const struct in_addr *addr,
  80                             const struct in_addr *mask,
  81                             struct netlbl_audit *audit_info);
  82int netlbl_domhsh_remove_af6(const char *domain,
  83                             const struct in6_addr *addr,
  84                             const struct in6_addr *mask,
  85                             struct netlbl_audit *audit_info);
  86int netlbl_domhsh_remove(const char *domain, u16 family,
  87                         struct netlbl_audit *audit_info);
  88int netlbl_domhsh_remove_default(u16 family, struct netlbl_audit *audit_info);
  89struct netlbl_dom_map *netlbl_domhsh_getentry(const char *domain, u16 family);
  90struct netlbl_dommap_def *netlbl_domhsh_getentry_af4(const char *domain,
  91                                                     __be32 addr);
  92#if IS_ENABLED(CONFIG_IPV6)
  93struct netlbl_dommap_def *netlbl_domhsh_getentry_af6(const char *domain,
  94                                                   const struct in6_addr *addr);
  95int netlbl_domhsh_remove_af6(const char *domain,
  96                             const struct in6_addr *addr,
  97                             const struct in6_addr *mask,
  98                             struct netlbl_audit *audit_info);
  99#endif /* IPv6 */
 100
 101int netlbl_domhsh_walk(u32 *skip_bkt,
 102                     u32 *skip_chain,
 103                     int (*callback) (struct netlbl_dom_map *entry, void *arg),
 104                     void *cb_arg);
 105
 106#endif
 107