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-rw-r--r--net/netlabel/netlabel_addrlist.h189
1 files changed, 189 insertions, 0 deletions
diff --git a/net/netlabel/netlabel_addrlist.h b/net/netlabel/netlabel_addrlist.h
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1/*
2 * NetLabel Network Address Lists
3 *
4 * This file contains network address list functions used to manage ordered
5 * lists of network addresses for use by the NetLabel subsystem. 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., 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, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 *
30 */
31
32#ifndef _NETLABEL_ADDRLIST_H
33#define _NETLABEL_ADDRLIST_H
34
35#include <linux/types.h>
36#include <linux/rcupdate.h>
37#include <linux/list.h>
38#include <linux/in6.h>
39#include <linux/audit.h>
40
41/**
42 * struct netlbl_af4list - NetLabel IPv4 address list
43 * @addr: IPv4 address
44 * @mask: IPv4 address mask
45 * @valid: valid flag
46 * @list: list structure, used internally
47 */
48struct netlbl_af4list {
49 __be32 addr;
50 __be32 mask;
51
52 u32 valid;
53 struct list_head list;
54};
55
56/**
57 * struct netlbl_af6list - NetLabel IPv6 address list
58 * @addr: IPv6 address
59 * @mask: IPv6 address mask
60 * @valid: valid flag
61 * @list: list structure, used internally
62 */
63struct netlbl_af6list {
64 struct in6_addr addr;
65 struct in6_addr mask;
66
67 u32 valid;
68 struct list_head list;
69};
70
71#define __af4list_entry(ptr) container_of(ptr, struct netlbl_af4list, list)
72
73static inline struct netlbl_af4list *__af4list_valid(struct list_head *s,
74 struct list_head *h)
75{
76 struct list_head *i = s;
77 struct netlbl_af4list *n = __af4list_entry(s);
78 while (i != h && !n->valid) {
79 i = i->next;
80 n = __af4list_entry(i);
81 }
82 return n;
83}
84
85static inline struct netlbl_af4list *__af4list_valid_rcu(struct list_head *s,
86 struct list_head *h)
87{
88 struct list_head *i = s;
89 struct netlbl_af4list *n = __af4list_entry(s);
90 while (i != h && !n->valid) {
91 i = rcu_dereference(i->next);
92 n = __af4list_entry(i);
93 }
94 return n;
95}
96
97#define netlbl_af4list_foreach(iter, head) \
98 for (iter = __af4list_valid((head)->next, head); \
99 prefetch(iter->list.next), &iter->list != (head); \
100 iter = __af4list_valid(iter->list.next, head))
101
102#define netlbl_af4list_foreach_rcu(iter, head) \
103 for (iter = __af4list_valid_rcu((head)->next, head); \
104 prefetch(iter->list.next), &iter->list != (head); \
105 iter = __af4list_valid_rcu(iter->list.next, head))
106
107#define netlbl_af4list_foreach_safe(iter, tmp, head) \
108 for (iter = __af4list_valid((head)->next, head), \
109 tmp = __af4list_valid(iter->list.next, head); \
110 &iter->list != (head); \
111 iter = tmp, tmp = __af4list_valid(iter->list.next, head))
112
113int netlbl_af4list_add(struct netlbl_af4list *entry,
114 struct list_head *head);
115struct netlbl_af4list *netlbl_af4list_remove(__be32 addr, __be32 mask,
116 struct list_head *head);
117void netlbl_af4list_remove_entry(struct netlbl_af4list *entry);
118struct netlbl_af4list *netlbl_af4list_search(__be32 addr,
119 struct list_head *head);
120struct netlbl_af4list *netlbl_af4list_search_exact(__be32 addr,
121 __be32 mask,
122 struct list_head *head);
123void netlbl_af4list_audit_addr(struct audit_buffer *audit_buf,
124 int src, const char *dev,
125 __be32 addr, __be32 mask);
126
127#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
128
129#define __af6list_entry(ptr) container_of(ptr, struct netlbl_af6list, list)
130
131static inline struct netlbl_af6list *__af6list_valid(struct list_head *s,
132 struct list_head *h)
133{
134 struct list_head *i = s;
135 struct netlbl_af6list *n = __af6list_entry(s);
136 while (i != h && !n->valid) {
137 i = i->next;
138 n = __af6list_entry(i);
139 }
140 return n;
141}
142
143static inline struct netlbl_af6list *__af6list_valid_rcu(struct list_head *s,
144 struct list_head *h)
145{
146 struct list_head *i = s;
147 struct netlbl_af6list *n = __af6list_entry(s);
148 while (i != h && !n->valid) {
149 i = rcu_dereference(i->next);
150 n = __af6list_entry(i);
151 }
152 return n;
153}
154
155#define netlbl_af6list_foreach(iter, head) \
156 for (iter = __af6list_valid((head)->next, head); \
157 prefetch(iter->list.next), &iter->list != (head); \
158 iter = __af6list_valid(iter->list.next, head))
159
160#define netlbl_af6list_foreach_rcu(iter, head) \
161 for (iter = __af6list_valid_rcu((head)->next, head); \
162 prefetch(iter->list.next), &iter->list != (head); \
163 iter = __af6list_valid_rcu(iter->list.next, head))
164
165#define netlbl_af6list_foreach_safe(iter, tmp, head) \
166 for (iter = __af6list_valid((head)->next, head), \
167 tmp = __af6list_valid(iter->list.next, head); \
168 &iter->list != (head); \
169 iter = tmp, tmp = __af6list_valid(iter->list.next, head))
170
171int netlbl_af6list_add(struct netlbl_af6list *entry,
172 struct list_head *head);
173struct netlbl_af6list *netlbl_af6list_remove(const struct in6_addr *addr,
174 const struct in6_addr *mask,
175 struct list_head *head);
176void netlbl_af6list_remove_entry(struct netlbl_af6list *entry);
177struct netlbl_af6list *netlbl_af6list_search(const struct in6_addr *addr,
178 struct list_head *head);
179struct netlbl_af6list *netlbl_af6list_search_exact(const struct in6_addr *addr,
180 const struct in6_addr *mask,
181 struct list_head *head);
182void netlbl_af6list_audit_addr(struct audit_buffer *audit_buf,
183 int src,
184 const char *dev,
185 const struct in6_addr *addr,
186 const struct in6_addr *mask);
187#endif /* IPV6 */
188
189#endif
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