Commit | Line | Data |
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7c2ea22e TH |
1 | /* |
2 | * security/tomoyo/group.c | |
3 | * | |
4 | * Copyright (C) 2005-2010 NTT DATA CORPORATION | |
5 | */ | |
6 | ||
7 | #include <linux/slab.h> | |
8 | #include "common.h" | |
9 | ||
10 | static bool tomoyo_same_path_group(const struct tomoyo_acl_head *a, | |
11 | const struct tomoyo_acl_head *b) | |
12 | { | |
13 | return container_of(a, struct tomoyo_path_group, head)->member_name == | |
14 | container_of(b, struct tomoyo_path_group, head)->member_name; | |
15 | } | |
16 | ||
17 | static bool tomoyo_same_number_group(const struct tomoyo_acl_head *a, | |
18 | const struct tomoyo_acl_head *b) | |
19 | { | |
20 | return !memcmp(&container_of(a, struct tomoyo_number_group, head) | |
21 | ->number, | |
22 | &container_of(b, struct tomoyo_number_group, head) | |
23 | ->number, | |
24 | sizeof(container_of(a, struct tomoyo_number_group, head) | |
25 | ->number)); | |
26 | } | |
27 | ||
28 | /** | |
29 | * tomoyo_write_group - Write "struct tomoyo_path_group"/"struct tomoyo_number_group" list. | |
30 | * | |
a238cf5b | 31 | * @param: Pointer to "struct tomoyo_acl_param". |
7c2ea22e TH |
32 | * @type: Type of this group. |
33 | * | |
34 | * Returns 0 on success, negative value otherwise. | |
35 | */ | |
a238cf5b | 36 | int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type) |
7c2ea22e | 37 | { |
a238cf5b | 38 | struct tomoyo_group *group = tomoyo_get_group(param, type); |
7c2ea22e | 39 | int error = -EINVAL; |
7c2ea22e TH |
40 | if (!group) |
41 | return -ENOMEM; | |
a238cf5b | 42 | param->list = &group->member_list; |
7c2ea22e TH |
43 | if (type == TOMOYO_PATH_GROUP) { |
44 | struct tomoyo_path_group e = { }; | |
a238cf5b | 45 | e.member_name = tomoyo_get_name(tomoyo_read_token(param)); |
7c2ea22e TH |
46 | if (!e.member_name) { |
47 | error = -ENOMEM; | |
48 | goto out; | |
49 | } | |
a238cf5b TH |
50 | error = tomoyo_update_policy(&e.head, sizeof(e), param, |
51 | tomoyo_same_path_group); | |
7c2ea22e TH |
52 | tomoyo_put_name(e.member_name); |
53 | } else if (type == TOMOYO_NUMBER_GROUP) { | |
54 | struct tomoyo_number_group e = { }; | |
a238cf5b TH |
55 | if (param->data[0] == '@' || |
56 | !tomoyo_parse_number_union(param, &e.number)) | |
7c2ea22e | 57 | goto out; |
a238cf5b TH |
58 | error = tomoyo_update_policy(&e.head, sizeof(e), param, |
59 | tomoyo_same_number_group); | |
7c2ea22e TH |
60 | /* |
61 | * tomoyo_put_number_union() is not needed because | |
a238cf5b | 62 | * param->data[0] != '@'. |
7c2ea22e TH |
63 | */ |
64 | } | |
a238cf5b | 65 | out: |
7c2ea22e TH |
66 | tomoyo_put_group(group); |
67 | return error; | |
68 | } | |
69 | ||
70 | /** | |
71 | * tomoyo_path_matches_group - Check whether the given pathname matches members of the given pathname group. | |
72 | * | |
73 | * @pathname: The name of pathname. | |
74 | * @group: Pointer to "struct tomoyo_path_group". | |
75 | * | |
484ca79c TH |
76 | * Returns matched member's pathname if @pathname matches pathnames in @group, |
77 | * NULL otherwise. | |
7c2ea22e TH |
78 | * |
79 | * Caller holds tomoyo_read_lock(). | |
80 | */ | |
484ca79c TH |
81 | const struct tomoyo_path_info * |
82 | tomoyo_path_matches_group(const struct tomoyo_path_info *pathname, | |
83 | const struct tomoyo_group *group) | |
7c2ea22e TH |
84 | { |
85 | struct tomoyo_path_group *member; | |
7c2ea22e TH |
86 | list_for_each_entry_rcu(member, &group->member_list, head.list) { |
87 | if (member->head.is_deleted) | |
88 | continue; | |
89 | if (!tomoyo_path_matches_pattern(pathname, member->member_name)) | |
90 | continue; | |
484ca79c | 91 | return member->member_name; |
7c2ea22e | 92 | } |
484ca79c | 93 | return NULL; |
7c2ea22e TH |
94 | } |
95 | ||
96 | /** | |
97 | * tomoyo_number_matches_group - Check whether the given number matches members of the given number group. | |
98 | * | |
99 | * @min: Min number. | |
100 | * @max: Max number. | |
101 | * @group: Pointer to "struct tomoyo_number_group". | |
102 | * | |
103 | * Returns true if @min and @max partially overlaps @group, false otherwise. | |
104 | * | |
105 | * Caller holds tomoyo_read_lock(). | |
106 | */ | |
107 | bool tomoyo_number_matches_group(const unsigned long min, | |
108 | const unsigned long max, | |
109 | const struct tomoyo_group *group) | |
110 | { | |
111 | struct tomoyo_number_group *member; | |
112 | bool matched = false; | |
113 | list_for_each_entry_rcu(member, &group->member_list, head.list) { | |
114 | if (member->head.is_deleted) | |
115 | continue; | |
116 | if (min > member->number.values[1] || | |
117 | max < member->number.values[0]) | |
118 | continue; | |
119 | matched = true; | |
120 | break; | |
121 | } | |
122 | return matched; | |
123 | } |