2 * security/tomoyo/group.c
4 * Copyright (C) 2005-2010 NTT DATA CORPORATION
7 #include <linux/slab.h>
10 static bool tomoyo_same_path_group(const struct tomoyo_acl_head *a,
11 const struct tomoyo_acl_head *b)
13 return container_of(a, struct tomoyo_path_group, head)->member_name ==
14 container_of(b, struct tomoyo_path_group, head)->member_name;
17 static bool tomoyo_same_number_group(const struct tomoyo_acl_head *a,
18 const struct tomoyo_acl_head *b)
20 return !memcmp(&container_of(a, struct tomoyo_number_group, head)
22 &container_of(b, struct tomoyo_number_group, head)
24 sizeof(container_of(a, struct tomoyo_number_group, head)
29 * tomoyo_write_group - Write "struct tomoyo_path_group"/"struct tomoyo_number_group" list.
31 * @data: String to parse.
32 * @is_delete: True if it is a delete request.
33 * @type: Type of this group.
35 * Returns 0 on success, negative value otherwise.
37 int tomoyo_write_group(char *data, const bool is_delete, const u8 type)
39 struct tomoyo_group *group;
40 struct list_head *member;
43 if (!tomoyo_tokenize(data, w, sizeof(w)) || !w[1][0])
45 group = tomoyo_get_group(w[0], type);
48 member = &group->member_list;
49 if (type == TOMOYO_PATH_GROUP) {
50 struct tomoyo_path_group e = { };
51 e.member_name = tomoyo_get_name(w[1]);
56 error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
57 member, tomoyo_same_path_group);
58 tomoyo_put_name(e.member_name);
59 } else if (type == TOMOYO_NUMBER_GROUP) {
60 struct tomoyo_number_group e = { };
62 || !tomoyo_parse_number_union(w[1], &e.number)
63 || e.number.values[0] > e.number.values[1])
65 error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
66 member, tomoyo_same_number_group);
68 * tomoyo_put_number_union() is not needed because
73 tomoyo_put_group(group);
78 * tomoyo_path_matches_group - Check whether the given pathname matches members of the given pathname group.
80 * @pathname: The name of pathname.
81 * @group: Pointer to "struct tomoyo_path_group".
83 * Returns matched member's pathname if @pathname matches pathnames in @group,
86 * Caller holds tomoyo_read_lock().
88 const struct tomoyo_path_info *
89 tomoyo_path_matches_group(const struct tomoyo_path_info *pathname,
90 const struct tomoyo_group *group)
92 struct tomoyo_path_group *member;
93 list_for_each_entry_rcu(member, &group->member_list, head.list) {
94 if (member->head.is_deleted)
96 if (!tomoyo_path_matches_pattern(pathname, member->member_name))
98 return member->member_name;
104 * tomoyo_number_matches_group - Check whether the given number matches members of the given number group.
108 * @group: Pointer to "struct tomoyo_number_group".
110 * Returns true if @min and @max partially overlaps @group, false otherwise.
112 * Caller holds tomoyo_read_lock().
114 bool tomoyo_number_matches_group(const unsigned long min,
115 const unsigned long max,
116 const struct tomoyo_group *group)
118 struct tomoyo_number_group *member;
119 bool matched = false;
120 list_for_each_entry_rcu(member, &group->member_list, head.list) {
121 if (member->head.is_deleted)
123 if (min > member->number.values[1] ||
124 max < member->number.values[0])