diff options
Diffstat (limited to 'security/tomoyo/number_group.c')
-rw-r--r-- | security/tomoyo/number_group.c | 126 |
1 files changed, 0 insertions, 126 deletions
diff --git a/security/tomoyo/number_group.c b/security/tomoyo/number_group.c deleted file mode 100644 index 5e75f5314bda..000000000000 --- a/security/tomoyo/number_group.c +++ /dev/null | |||
@@ -1,126 +0,0 @@ | |||
1 | /* | ||
2 | * security/tomoyo/number_group.c | ||
3 | * | ||
4 | * Copyright (C) 2005-2009 NTT DATA CORPORATION | ||
5 | */ | ||
6 | |||
7 | #include <linux/slab.h> | ||
8 | #include "common.h" | ||
9 | |||
10 | /** | ||
11 | * tomoyo_get_group - Allocate memory for "struct tomoyo_number_group". | ||
12 | * | ||
13 | * @group_name: The name of number group. | ||
14 | * | ||
15 | * Returns pointer to "struct tomoyo_number_group" on success, | ||
16 | * NULL otherwise. | ||
17 | */ | ||
18 | struct tomoyo_group *tomoyo_get_number_group(const char *group_name) | ||
19 | { | ||
20 | struct tomoyo_group *entry = NULL; | ||
21 | struct tomoyo_group *group = NULL; | ||
22 | const struct tomoyo_path_info *saved_group_name; | ||
23 | int error = -ENOMEM; | ||
24 | if (!tomoyo_correct_word(group_name)) | ||
25 | return NULL; | ||
26 | saved_group_name = tomoyo_get_name(group_name); | ||
27 | if (!saved_group_name) | ||
28 | return NULL; | ||
29 | entry = kzalloc(sizeof(*entry), GFP_NOFS); | ||
30 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) | ||
31 | goto out; | ||
32 | list_for_each_entry_rcu(group, &tomoyo_group_list[TOMOYO_NUMBER_GROUP], | ||
33 | list) { | ||
34 | if (saved_group_name != group->group_name) | ||
35 | continue; | ||
36 | atomic_inc(&group->users); | ||
37 | error = 0; | ||
38 | break; | ||
39 | } | ||
40 | if (error && tomoyo_memory_ok(entry)) { | ||
41 | INIT_LIST_HEAD(&entry->member_list); | ||
42 | entry->group_name = saved_group_name; | ||
43 | saved_group_name = NULL; | ||
44 | atomic_set(&entry->users, 1); | ||
45 | list_add_tail_rcu(&entry->list, | ||
46 | &tomoyo_group_list[TOMOYO_NUMBER_GROUP]); | ||
47 | group = entry; | ||
48 | entry = NULL; | ||
49 | error = 0; | ||
50 | } | ||
51 | mutex_unlock(&tomoyo_policy_lock); | ||
52 | out: | ||
53 | tomoyo_put_name(saved_group_name); | ||
54 | kfree(entry); | ||
55 | return !error ? group : NULL; | ||
56 | } | ||
57 | |||
58 | static bool tomoyo_same_number_group(const struct tomoyo_acl_head *a, | ||
59 | const struct tomoyo_acl_head *b) | ||
60 | { | ||
61 | return !memcmp(&container_of(a, struct tomoyo_number_group, | ||
62 | head)->number, | ||
63 | &container_of(b, struct tomoyo_number_group, | ||
64 | head)->number, | ||
65 | sizeof(container_of(a, | ||
66 | struct tomoyo_number_group, | ||
67 | head)->number)); | ||
68 | } | ||
69 | |||
70 | /** | ||
71 | * tomoyo_write_number_group_policy - Write "struct tomoyo_number_group" list. | ||
72 | * | ||
73 | * @data: String to parse. | ||
74 | * @is_delete: True if it is a delete request. | ||
75 | * | ||
76 | * Returns 0 on success, nagative value otherwise. | ||
77 | */ | ||
78 | int tomoyo_write_number_group_policy(char *data, const bool is_delete) | ||
79 | { | ||
80 | struct tomoyo_group *group; | ||
81 | struct tomoyo_number_group e = { }; | ||
82 | int error; | ||
83 | char *w[2]; | ||
84 | if (!tomoyo_tokenize(data, w, sizeof(w))) | ||
85 | return -EINVAL; | ||
86 | if (w[1][0] == '@' || !tomoyo_parse_number_union(w[1], &e.number) || | ||
87 | e.number.values[0] > e.number.values[1]) | ||
88 | return -EINVAL; | ||
89 | group = tomoyo_get_number_group(w[0]); | ||
90 | if (!group) | ||
91 | return -ENOMEM; | ||
92 | error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, | ||
93 | &group->member_list, | ||
94 | tomoyo_same_number_group); | ||
95 | tomoyo_put_group(group); | ||
96 | return error; | ||
97 | } | ||
98 | |||
99 | /** | ||
100 | * tomoyo_number_matches_group - Check whether the given number matches members of the given number group. | ||
101 | * | ||
102 | * @min: Min number. | ||
103 | * @max: Max number. | ||
104 | * @group: Pointer to "struct tomoyo_number_group". | ||
105 | * | ||
106 | * Returns true if @min and @max partially overlaps @group, false otherwise. | ||
107 | * | ||
108 | * Caller holds tomoyo_read_lock(). | ||
109 | */ | ||
110 | bool tomoyo_number_matches_group(const unsigned long min, | ||
111 | const unsigned long max, | ||
112 | const struct tomoyo_group *group) | ||
113 | { | ||
114 | struct tomoyo_number_group *member; | ||
115 | bool matched = false; | ||
116 | list_for_each_entry_rcu(member, &group->member_list, head.list) { | ||
117 | if (member->head.is_deleted) | ||
118 | continue; | ||
119 | if (min > member->number.values[1] || | ||
120 | max < member->number.values[0]) | ||
121 | continue; | ||
122 | matched = true; | ||
123 | break; | ||
124 | } | ||
125 | return matched; | ||
126 | } | ||