Commit | Line | Data |
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c3ef1500 TH |
1 | /* |
2 | * security/tomoyo/common.c | |
3 | * | |
4 | * Securityfs interface for TOMOYO. | |
5 | * | |
6 | * Copyright (C) 2005-2010 NTT DATA CORPORATION | |
7 | */ | |
8 | ||
9 | #include <linux/security.h> | |
10 | #include "common.h" | |
11 | ||
12 | /** | |
13 | * tomoyo_open - open() for /sys/kernel/security/tomoyo/ interface. | |
14 | * | |
15 | * @inode: Pointer to "struct inode". | |
16 | * @file: Pointer to "struct file". | |
17 | * | |
18 | * Returns 0 on success, negative value otherwise. | |
19 | */ | |
20 | static int tomoyo_open(struct inode *inode, struct file *file) | |
21 | { | |
22 | const int key = ((u8 *) file->f_path.dentry->d_inode->i_private) | |
23 | - ((u8 *) NULL); | |
24 | return tomoyo_open_control(key, file); | |
25 | } | |
26 | ||
27 | /** | |
28 | * tomoyo_release - close() for /sys/kernel/security/tomoyo/ interface. | |
29 | * | |
30 | * @inode: Pointer to "struct inode". | |
31 | * @file: Pointer to "struct file". | |
32 | * | |
33 | * Returns 0 on success, negative value otherwise. | |
34 | */ | |
35 | static int tomoyo_release(struct inode *inode, struct file *file) | |
36 | { | |
37 | return tomoyo_close_control(file); | |
38 | } | |
39 | ||
0849e3ba TH |
40 | /** |
41 | * tomoyo_poll - poll() for /proc/ccs/ interface. | |
42 | * | |
43 | * @file: Pointer to "struct file". | |
44 | * @wait: Pointer to "poll_table". | |
45 | * | |
46 | * Returns 0 on success, negative value otherwise. | |
47 | */ | |
48 | static unsigned int tomoyo_poll(struct file *file, poll_table *wait) | |
49 | { | |
50 | return tomoyo_poll_control(file, wait); | |
51 | } | |
52 | ||
c3ef1500 TH |
53 | /** |
54 | * tomoyo_read - read() for /sys/kernel/security/tomoyo/ interface. | |
55 | * | |
56 | * @file: Pointer to "struct file". | |
57 | * @buf: Pointer to buffer. | |
58 | * @count: Size of @buf. | |
59 | * @ppos: Unused. | |
60 | * | |
61 | * Returns bytes read on success, negative value otherwise. | |
62 | */ | |
63 | static ssize_t tomoyo_read(struct file *file, char __user *buf, size_t count, | |
64 | loff_t *ppos) | |
65 | { | |
66 | return tomoyo_read_control(file, buf, count); | |
67 | } | |
68 | ||
69 | /** | |
70 | * tomoyo_write - write() for /sys/kernel/security/tomoyo/ interface. | |
71 | * | |
72 | * @file: Pointer to "struct file". | |
73 | * @buf: Pointer to buffer. | |
74 | * @count: Size of @buf. | |
75 | * @ppos: Unused. | |
76 | * | |
77 | * Returns @count on success, negative value otherwise. | |
78 | */ | |
79 | static ssize_t tomoyo_write(struct file *file, const char __user *buf, | |
80 | size_t count, loff_t *ppos) | |
81 | { | |
82 | return tomoyo_write_control(file, buf, count); | |
83 | } | |
84 | ||
85 | /* | |
86 | * tomoyo_operations is a "struct file_operations" which is used for handling | |
87 | * /sys/kernel/security/tomoyo/ interface. | |
88 | * | |
89 | * Some files under /sys/kernel/security/tomoyo/ directory accept open(O_RDWR). | |
90 | * See tomoyo_io_buffer for internals. | |
91 | */ | |
92 | static const struct file_operations tomoyo_operations = { | |
93 | .open = tomoyo_open, | |
94 | .release = tomoyo_release, | |
0849e3ba | 95 | .poll = tomoyo_poll, |
c3ef1500 TH |
96 | .read = tomoyo_read, |
97 | .write = tomoyo_write, | |
7e2deb7c | 98 | .llseek = noop_llseek, |
c3ef1500 TH |
99 | }; |
100 | ||
101 | /** | |
102 | * tomoyo_create_entry - Create interface files under /sys/kernel/security/tomoyo/ directory. | |
103 | * | |
104 | * @name: The name of the interface file. | |
105 | * @mode: The permission of the interface file. | |
106 | * @parent: The parent directory. | |
107 | * @key: Type of interface. | |
108 | * | |
109 | * Returns nothing. | |
110 | */ | |
111 | static void __init tomoyo_create_entry(const char *name, const mode_t mode, | |
112 | struct dentry *parent, const u8 key) | |
113 | { | |
114 | securityfs_create_file(name, mode, parent, ((u8 *) NULL) + key, | |
115 | &tomoyo_operations); | |
116 | } | |
117 | ||
118 | /** | |
119 | * tomoyo_initerface_init - Initialize /sys/kernel/security/tomoyo/ interface. | |
120 | * | |
121 | * Returns 0. | |
122 | */ | |
123 | static int __init tomoyo_initerface_init(void) | |
124 | { | |
125 | struct dentry *tomoyo_dir; | |
126 | ||
127 | /* Don't create securityfs entries unless registered. */ | |
128 | if (current_cred()->security != &tomoyo_kernel_domain) | |
129 | return 0; | |
130 | ||
131 | tomoyo_dir = securityfs_create_dir("tomoyo", NULL); | |
132 | tomoyo_create_entry("query", 0600, tomoyo_dir, | |
133 | TOMOYO_QUERY); | |
134 | tomoyo_create_entry("domain_policy", 0600, tomoyo_dir, | |
135 | TOMOYO_DOMAINPOLICY); | |
136 | tomoyo_create_entry("exception_policy", 0600, tomoyo_dir, | |
137 | TOMOYO_EXCEPTIONPOLICY); | |
138 | tomoyo_create_entry("self_domain", 0400, tomoyo_dir, | |
139 | TOMOYO_SELFDOMAIN); | |
140 | tomoyo_create_entry(".domain_status", 0600, tomoyo_dir, | |
141 | TOMOYO_DOMAIN_STATUS); | |
142 | tomoyo_create_entry(".process_status", 0600, tomoyo_dir, | |
143 | TOMOYO_PROCESS_STATUS); | |
144 | tomoyo_create_entry("meminfo", 0600, tomoyo_dir, | |
145 | TOMOYO_MEMINFO); | |
146 | tomoyo_create_entry("profile", 0600, tomoyo_dir, | |
147 | TOMOYO_PROFILE); | |
148 | tomoyo_create_entry("manager", 0600, tomoyo_dir, | |
149 | TOMOYO_MANAGER); | |
150 | tomoyo_create_entry("version", 0400, tomoyo_dir, | |
151 | TOMOYO_VERSION); | |
152 | return 0; | |
153 | } | |
154 | ||
155 | fs_initcall(tomoyo_initerface_init); |