KMS: fix EDID detailed timing vsync parsing
[linux-2.6/cjktty.git] / security / tomoyo / group.c
blob50092534ec54083d0af18d852e9e0dc0dc9c154f
1 /*
2 * security/tomoyo/group.c
4 * Copyright (C) 2005-2011 NTT DATA CORPORATION
5 */
7 #include <linux/slab.h>
8 #include "common.h"
10 /**
11 * tomoyo_same_path_group - Check for duplicated "struct tomoyo_path_group" entry.
13 * @a: Pointer to "struct tomoyo_acl_head".
14 * @b: Pointer to "struct tomoyo_acl_head".
16 * Returns true if @a == @b, false otherwise.
18 static bool tomoyo_same_path_group(const struct tomoyo_acl_head *a,
19 const struct tomoyo_acl_head *b)
21 return container_of(a, struct tomoyo_path_group, head)->member_name ==
22 container_of(b, struct tomoyo_path_group, head)->member_name;
25 /**
26 * tomoyo_same_number_group - Check for duplicated "struct tomoyo_number_group" entry.
28 * @a: Pointer to "struct tomoyo_acl_head".
29 * @b: Pointer to "struct tomoyo_acl_head".
31 * Returns true if @a == @b, false otherwise.
33 static bool tomoyo_same_number_group(const struct tomoyo_acl_head *a,
34 const struct tomoyo_acl_head *b)
36 return !memcmp(&container_of(a, struct tomoyo_number_group, head)
37 ->number,
38 &container_of(b, struct tomoyo_number_group, head)
39 ->number,
40 sizeof(container_of(a, struct tomoyo_number_group, head)
41 ->number));
44 /**
45 * tomoyo_same_address_group - Check for duplicated "struct tomoyo_address_group" entry.
47 * @a: Pointer to "struct tomoyo_acl_head".
48 * @b: Pointer to "struct tomoyo_acl_head".
50 * Returns true if @a == @b, false otherwise.
52 static bool tomoyo_same_address_group(const struct tomoyo_acl_head *a,
53 const struct tomoyo_acl_head *b)
55 const struct tomoyo_address_group *p1 = container_of(a, typeof(*p1),
56 head);
57 const struct tomoyo_address_group *p2 = container_of(b, typeof(*p2),
58 head);
60 return tomoyo_same_ipaddr_union(&p1->address, &p2->address);
63 /**
64 * tomoyo_write_group - Write "struct tomoyo_path_group"/"struct tomoyo_number_group"/"struct tomoyo_address_group" list.
66 * @param: Pointer to "struct tomoyo_acl_param".
67 * @type: Type of this group.
69 * Returns 0 on success, negative value otherwise.
71 int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type)
73 struct tomoyo_group *group = tomoyo_get_group(param, type);
74 int error = -EINVAL;
75 if (!group)
76 return -ENOMEM;
77 param->list = &group->member_list;
78 if (type == TOMOYO_PATH_GROUP) {
79 struct tomoyo_path_group e = { };
80 e.member_name = tomoyo_get_name(tomoyo_read_token(param));
81 if (!e.member_name) {
82 error = -ENOMEM;
83 goto out;
85 error = tomoyo_update_policy(&e.head, sizeof(e), param,
86 tomoyo_same_path_group);
87 tomoyo_put_name(e.member_name);
88 } else if (type == TOMOYO_NUMBER_GROUP) {
89 struct tomoyo_number_group e = { };
90 if (param->data[0] == '@' ||
91 !tomoyo_parse_number_union(param, &e.number))
92 goto out;
93 error = tomoyo_update_policy(&e.head, sizeof(e), param,
94 tomoyo_same_number_group);
96 * tomoyo_put_number_union() is not needed because
97 * param->data[0] != '@'.
99 } else {
100 struct tomoyo_address_group e = { };
102 if (param->data[0] == '@' ||
103 !tomoyo_parse_ipaddr_union(param, &e.address))
104 goto out;
105 error = tomoyo_update_policy(&e.head, sizeof(e), param,
106 tomoyo_same_address_group);
108 out:
109 tomoyo_put_group(group);
110 return error;
114 * tomoyo_path_matches_group - Check whether the given pathname matches members of the given pathname group.
116 * @pathname: The name of pathname.
117 * @group: Pointer to "struct tomoyo_path_group".
119 * Returns matched member's pathname if @pathname matches pathnames in @group,
120 * NULL otherwise.
122 * Caller holds tomoyo_read_lock().
124 const struct tomoyo_path_info *
125 tomoyo_path_matches_group(const struct tomoyo_path_info *pathname,
126 const struct tomoyo_group *group)
128 struct tomoyo_path_group *member;
129 list_for_each_entry_rcu(member, &group->member_list, head.list) {
130 if (member->head.is_deleted)
131 continue;
132 if (!tomoyo_path_matches_pattern(pathname, member->member_name))
133 continue;
134 return member->member_name;
136 return NULL;
140 * tomoyo_number_matches_group - Check whether the given number matches members of the given number group.
142 * @min: Min number.
143 * @max: Max number.
144 * @group: Pointer to "struct tomoyo_number_group".
146 * Returns true if @min and @max partially overlaps @group, false otherwise.
148 * Caller holds tomoyo_read_lock().
150 bool tomoyo_number_matches_group(const unsigned long min,
151 const unsigned long max,
152 const struct tomoyo_group *group)
154 struct tomoyo_number_group *member;
155 bool matched = false;
156 list_for_each_entry_rcu(member, &group->member_list, head.list) {
157 if (member->head.is_deleted)
158 continue;
159 if (min > member->number.values[1] ||
160 max < member->number.values[0])
161 continue;
162 matched = true;
163 break;
165 return matched;
169 * tomoyo_address_matches_group - Check whether the given address matches members of the given address group.
171 * @is_ipv6: True if @address is an IPv6 address.
172 * @address: An IPv4 or IPv6 address.
173 * @group: Pointer to "struct tomoyo_address_group".
175 * Returns true if @address matches addresses in @group group, false otherwise.
177 * Caller holds tomoyo_read_lock().
179 bool tomoyo_address_matches_group(const bool is_ipv6, const __be32 *address,
180 const struct tomoyo_group *group)
182 struct tomoyo_address_group *member;
183 bool matched = false;
184 const u8 size = is_ipv6 ? 16 : 4;
186 list_for_each_entry_rcu(member, &group->member_list, head.list) {
187 if (member->head.is_deleted)
188 continue;
189 if (member->address.is_ipv6 != is_ipv6)
190 continue;
191 if (memcmp(&member->address.ip[0], address, size) > 0 ||
192 memcmp(address, &member->address.ip[1], size) > 0)
193 continue;
194 matched = true;
195 break;
197 return matched;