1 // SPDX-License-Identifier: GPL-2.0
3 * security/tomoyo/group.c
5 * Copyright (C) 2005-2011 NTT DATA CORPORATION
8 #include <linux/slab.h>
9 #include <linux/rculist.h>
14 * tomoyo_same_path_group - Check for duplicated "struct tomoyo_path_group" entry.
16 * @a: Pointer to "struct tomoyo_acl_head".
17 * @b: Pointer to "struct tomoyo_acl_head".
19 * Returns true if @a == @b, false otherwise.
21 static bool tomoyo_same_path_group(const struct tomoyo_acl_head *a,
22 const struct tomoyo_acl_head *b)
24 return container_of(a, struct tomoyo_path_group, head)->member_name ==
25 container_of(b, struct tomoyo_path_group, head)->member_name;
29 * tomoyo_same_number_group - Check for duplicated "struct tomoyo_number_group" entry.
31 * @a: Pointer to "struct tomoyo_acl_head".
32 * @b: Pointer to "struct tomoyo_acl_head".
34 * Returns true if @a == @b, false otherwise.
36 static bool tomoyo_same_number_group(const struct tomoyo_acl_head *a,
37 const struct tomoyo_acl_head *b)
39 return !memcmp(&container_of(a, struct tomoyo_number_group, head)
41 &container_of(b, struct tomoyo_number_group, head)
43 sizeof(container_of(a, struct tomoyo_number_group, head)
48 * tomoyo_same_address_group - Check for duplicated "struct tomoyo_address_group" entry.
50 * @a: Pointer to "struct tomoyo_acl_head".
51 * @b: Pointer to "struct tomoyo_acl_head".
53 * Returns true if @a == @b, false otherwise.
55 static bool tomoyo_same_address_group(const struct tomoyo_acl_head *a,
56 const struct tomoyo_acl_head *b)
58 const struct tomoyo_address_group *p1 = container_of(a, typeof(*p1),
60 const struct tomoyo_address_group *p2 = container_of(b, typeof(*p2),
63 return tomoyo_same_ipaddr_union(&p1->address, &p2->address);
67 * tomoyo_write_group - Write "struct tomoyo_path_group"/"struct tomoyo_number_group"/"struct tomoyo_address_group" list.
69 * @param: Pointer to "struct tomoyo_acl_param".
70 * @type: Type of this group.
72 * Returns 0 on success, negative value otherwise.
74 int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type)
76 struct tomoyo_group *group = tomoyo_get_group(param, type);
80 param->list = &group->member_list;
81 if (type == TOMOYO_PATH_GROUP) {
82 struct tomoyo_path_group e = { };
83 e.member_name = tomoyo_get_name(tomoyo_read_token(param));
88 error = tomoyo_update_policy(&e.head, sizeof(e), param,
89 tomoyo_same_path_group);
90 tomoyo_put_name(e.member_name);
91 } else if (type == TOMOYO_NUMBER_GROUP) {
92 struct tomoyo_number_group e = { };
93 if (param->data[0] == '@' ||
94 !tomoyo_parse_number_union(param, &e.number))
96 error = tomoyo_update_policy(&e.head, sizeof(e), param,
97 tomoyo_same_number_group);
99 * tomoyo_put_number_union() is not needed because
100 * param->data[0] != '@'.
103 struct tomoyo_address_group e = { };
105 if (param->data[0] == '@' ||
106 !tomoyo_parse_ipaddr_union(param, &e.address))
108 error = tomoyo_update_policy(&e.head, sizeof(e), param,
109 tomoyo_same_address_group);
112 tomoyo_put_group(group);
117 * tomoyo_path_matches_group - Check whether the given pathname matches members of the given pathname group.
119 * @pathname: The name of pathname.
120 * @group: Pointer to "struct tomoyo_path_group".
122 * Returns matched member's pathname if @pathname matches pathnames in @group,
125 * Caller holds tomoyo_read_lock().
127 const struct tomoyo_path_info *
128 tomoyo_path_matches_group(const struct tomoyo_path_info *pathname,
129 const struct tomoyo_group *group)
131 struct tomoyo_path_group *member;
132 list_for_each_entry_rcu(member, &group->member_list, head.list) {
133 if (member->head.is_deleted)
135 if (!tomoyo_path_matches_pattern(pathname, member->member_name))
137 return member->member_name;
143 * tomoyo_number_matches_group - Check whether the given number matches members of the given number group.
147 * @group: Pointer to "struct tomoyo_number_group".
149 * Returns true if @min and @max partially overlaps @group, false otherwise.
151 * Caller holds tomoyo_read_lock().
153 bool tomoyo_number_matches_group(const unsigned long min,
154 const unsigned long max,
155 const struct tomoyo_group *group)
157 struct tomoyo_number_group *member;
158 bool matched = false;
159 list_for_each_entry_rcu(member, &group->member_list, head.list) {
160 if (member->head.is_deleted)
162 if (min > member->number.values[1] ||
163 max < member->number.values[0])
172 * tomoyo_address_matches_group - Check whether the given address matches members of the given address group.
174 * @is_ipv6: True if @address is an IPv6 address.
175 * @address: An IPv4 or IPv6 address.
176 * @group: Pointer to "struct tomoyo_address_group".
178 * Returns true if @address matches addresses in @group group, false otherwise.
180 * Caller holds tomoyo_read_lock().
182 bool tomoyo_address_matches_group(const bool is_ipv6, const __be32 *address,
183 const struct tomoyo_group *group)
185 struct tomoyo_address_group *member;
186 bool matched = false;
187 const u8 size = is_ipv6 ? 16 : 4;
189 list_for_each_entry_rcu(member, &group->member_list, head.list) {
190 if (member->head.is_deleted)
192 if (member->address.is_ipv6 != is_ipv6)
194 if (memcmp(&member->address.ip[0], address, size) > 0 ||
195 memcmp(address, &member->address.ip[1], size) > 0)