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 struct netlbl_dommap_def def;
61 u16 family;
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