Commit | Line | Data |
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9590837b KT |
1 | /* |
2 | * security/tomoyo/common.h | |
3 | * | |
76bb0895 | 4 | * Header file for TOMOYO. |
9590837b | 5 | * |
76bb0895 | 6 | * Copyright (C) 2005-2010 NTT DATA CORPORATION |
9590837b KT |
7 | */ |
8 | ||
9 | #ifndef _SECURITY_TOMOYO_COMMON_H | |
10 | #define _SECURITY_TOMOYO_COMMON_H | |
11 | ||
12 | #include <linux/ctype.h> | |
13 | #include <linux/string.h> | |
14 | #include <linux/mm.h> | |
15 | #include <linux/file.h> | |
16 | #include <linux/kmod.h> | |
17 | #include <linux/fs.h> | |
18 | #include <linux/sched.h> | |
19 | #include <linux/namei.h> | |
20 | #include <linux/mount.h> | |
21 | #include <linux/list.h> | |
76bb0895 TH |
22 | #include <linux/cred.h> |
23 | struct linux_binprm; | |
24 | ||
25 | /********** Constants definitions. **********/ | |
26 | ||
27 | /* | |
28 | * TOMOYO uses this hash only when appending a string into the string | |
29 | * table. Frequency of appending strings is very low. So we don't need | |
30 | * large (e.g. 64k) hash size. 256 will be sufficient. | |
31 | */ | |
32 | #define TOMOYO_HASH_BITS 8 | |
33 | #define TOMOYO_MAX_HASH (1u<<TOMOYO_HASH_BITS) | |
34 | ||
35 | /* | |
36 | * This is the max length of a token. | |
37 | * | |
38 | * A token consists of only ASCII printable characters. | |
39 | * Non printable characters in a token is represented in \ooo style | |
40 | * octal string. Thus, \ itself is represented as \\. | |
41 | */ | |
42 | #define TOMOYO_MAX_PATHNAME_LEN 4000 | |
43 | ||
44 | /* Profile number is an integer between 0 and 255. */ | |
45 | #define TOMOYO_MAX_PROFILES 256 | |
46 | ||
cb0abe6a TH |
47 | enum tomoyo_mode_index { |
48 | TOMOYO_CONFIG_DISABLED, | |
49 | TOMOYO_CONFIG_LEARNING, | |
50 | TOMOYO_CONFIG_PERMISSIVE, | |
51 | TOMOYO_CONFIG_ENFORCING | |
52 | }; | |
53 | ||
76bb0895 TH |
54 | /* Keywords for ACLs. */ |
55 | #define TOMOYO_KEYWORD_ALIAS "alias " | |
2106ccd9 | 56 | #define TOMOYO_KEYWORD_ALLOW_MOUNT "allow_mount " |
76bb0895 TH |
57 | #define TOMOYO_KEYWORD_ALLOW_READ "allow_read " |
58 | #define TOMOYO_KEYWORD_DELETE "delete " | |
59 | #define TOMOYO_KEYWORD_DENY_REWRITE "deny_rewrite " | |
60 | #define TOMOYO_KEYWORD_FILE_PATTERN "file_pattern " | |
61 | #define TOMOYO_KEYWORD_INITIALIZE_DOMAIN "initialize_domain " | |
62 | #define TOMOYO_KEYWORD_KEEP_DOMAIN "keep_domain " | |
63 | #define TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN "no_initialize_domain " | |
64 | #define TOMOYO_KEYWORD_NO_KEEP_DOMAIN "no_keep_domain " | |
7762fbff | 65 | #define TOMOYO_KEYWORD_PATH_GROUP "path_group " |
4c3e9e2d | 66 | #define TOMOYO_KEYWORD_NUMBER_GROUP "number_group " |
76bb0895 TH |
67 | #define TOMOYO_KEYWORD_SELECT "select " |
68 | #define TOMOYO_KEYWORD_USE_PROFILE "use_profile " | |
69 | #define TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ "ignore_global_allow_read" | |
70 | /* A domain definition starts with <kernel>. */ | |
71 | #define TOMOYO_ROOT_NAME "<kernel>" | |
72 | #define TOMOYO_ROOT_NAME_LEN (sizeof(TOMOYO_ROOT_NAME) - 1) | |
73 | ||
4c3e9e2d TH |
74 | /* Value type definition. */ |
75 | #define TOMOYO_VALUE_TYPE_INVALID 0 | |
76 | #define TOMOYO_VALUE_TYPE_DECIMAL 1 | |
77 | #define TOMOYO_VALUE_TYPE_OCTAL 2 | |
78 | #define TOMOYO_VALUE_TYPE_HEXADECIMAL 3 | |
79 | ||
76bb0895 | 80 | /* Index numbers for Access Controls. */ |
084da356 TH |
81 | enum tomoyo_mac_index { |
82 | TOMOYO_MAC_FOR_FILE, /* domain_policy.conf */ | |
83 | TOMOYO_MAX_ACCEPT_ENTRY, | |
84 | TOMOYO_VERBOSE, | |
85 | TOMOYO_MAX_CONTROL_INDEX | |
86 | }; | |
76bb0895 TH |
87 | |
88 | /* Index numbers for Access Controls. */ | |
084da356 | 89 | enum tomoyo_acl_entry_type_index { |
7ef61233 TH |
90 | TOMOYO_TYPE_PATH_ACL, |
91 | TOMOYO_TYPE_PATH2_ACL, | |
a1f9bb6a TH |
92 | TOMOYO_TYPE_PATH_NUMBER_ACL, |
93 | TOMOYO_TYPE_PATH_NUMBER3_ACL, | |
2106ccd9 | 94 | TOMOYO_TYPE_MOUNT_ACL, |
084da356 | 95 | }; |
76bb0895 TH |
96 | |
97 | /* Index numbers for File Controls. */ | |
98 | ||
99 | /* | |
a1f9bb6a TH |
100 | * TOMOYO_TYPE_READ_WRITE is special. TOMOYO_TYPE_READ_WRITE is automatically |
101 | * set if both TOMOYO_TYPE_READ and TOMOYO_TYPE_WRITE are set. | |
102 | * Both TOMOYO_TYPE_READ and TOMOYO_TYPE_WRITE are automatically set if | |
103 | * TOMOYO_TYPE_READ_WRITE is set. | |
104 | * TOMOYO_TYPE_READ_WRITE is automatically cleared if either TOMOYO_TYPE_READ | |
105 | * or TOMOYO_TYPE_WRITE is cleared. | |
106 | * Both TOMOYO_TYPE_READ and TOMOYO_TYPE_WRITE are automatically cleared if | |
107 | * TOMOYO_TYPE_READ_WRITE is cleared. | |
76bb0895 TH |
108 | */ |
109 | ||
084da356 | 110 | enum tomoyo_path_acl_index { |
7ef61233 TH |
111 | TOMOYO_TYPE_READ_WRITE, |
112 | TOMOYO_TYPE_EXECUTE, | |
113 | TOMOYO_TYPE_READ, | |
114 | TOMOYO_TYPE_WRITE, | |
7ef61233 | 115 | TOMOYO_TYPE_UNLINK, |
7ef61233 | 116 | TOMOYO_TYPE_RMDIR, |
7ef61233 TH |
117 | TOMOYO_TYPE_TRUNCATE, |
118 | TOMOYO_TYPE_SYMLINK, | |
119 | TOMOYO_TYPE_REWRITE, | |
7ef61233 | 120 | TOMOYO_TYPE_CHROOT, |
7ef61233 TH |
121 | TOMOYO_TYPE_UMOUNT, |
122 | TOMOYO_MAX_PATH_OPERATION | |
084da356 TH |
123 | }; |
124 | ||
a1f9bb6a TH |
125 | enum tomoyo_path_number3_acl_index { |
126 | TOMOYO_TYPE_MKBLOCK, | |
127 | TOMOYO_TYPE_MKCHAR, | |
128 | TOMOYO_MAX_PATH_NUMBER3_OPERATION | |
129 | }; | |
130 | ||
084da356 | 131 | enum tomoyo_path2_acl_index { |
7ef61233 TH |
132 | TOMOYO_TYPE_LINK, |
133 | TOMOYO_TYPE_RENAME, | |
134 | TOMOYO_TYPE_PIVOT_ROOT, | |
135 | TOMOYO_MAX_PATH2_OPERATION | |
084da356 TH |
136 | }; |
137 | ||
a1f9bb6a TH |
138 | enum tomoyo_path_number_acl_index { |
139 | TOMOYO_TYPE_CREATE, | |
140 | TOMOYO_TYPE_MKDIR, | |
141 | TOMOYO_TYPE_MKFIFO, | |
142 | TOMOYO_TYPE_MKSOCK, | |
143 | TOMOYO_TYPE_IOCTL, | |
144 | TOMOYO_TYPE_CHMOD, | |
145 | TOMOYO_TYPE_CHOWN, | |
146 | TOMOYO_TYPE_CHGRP, | |
147 | TOMOYO_MAX_PATH_NUMBER_OPERATION | |
148 | }; | |
149 | ||
084da356 TH |
150 | enum tomoyo_securityfs_interface_index { |
151 | TOMOYO_DOMAINPOLICY, | |
152 | TOMOYO_EXCEPTIONPOLICY, | |
153 | TOMOYO_DOMAIN_STATUS, | |
154 | TOMOYO_PROCESS_STATUS, | |
155 | TOMOYO_MEMINFO, | |
156 | TOMOYO_SELFDOMAIN, | |
157 | TOMOYO_VERSION, | |
158 | TOMOYO_PROFILE, | |
159 | TOMOYO_MANAGER | |
160 | }; | |
9590837b | 161 | |
76bb0895 | 162 | /********** Structure definitions. **********/ |
9590837b | 163 | |
c3fa109a TH |
164 | /* |
165 | * tomoyo_page_buffer is a structure which is used for holding a pathname | |
166 | * obtained from "struct dentry" and "struct vfsmount" pair. | |
167 | * As of now, it is 4096 bytes. If users complain that 4096 bytes is too small | |
168 | * (because TOMOYO escapes non ASCII printable characters using \ooo format), | |
169 | * we will make the buffer larger. | |
170 | */ | |
9590837b KT |
171 | struct tomoyo_page_buffer { |
172 | char buffer[4096]; | |
173 | }; | |
174 | ||
cb0abe6a TH |
175 | /* |
176 | * tomoyo_request_info is a structure which is used for holding | |
177 | * | |
178 | * (1) Domain information of current process. | |
179 | * (2) Access control mode of the profile. | |
180 | */ | |
181 | struct tomoyo_request_info { | |
182 | struct tomoyo_domain_info *domain; | |
183 | u8 mode; /* One of tomoyo_mode_index . */ | |
184 | }; | |
185 | ||
c3fa109a TH |
186 | /* |
187 | * tomoyo_path_info is a structure which is used for holding a string data | |
188 | * used by TOMOYO. | |
189 | * This structure has several fields for supporting pattern matching. | |
190 | * | |
191 | * (1) "name" is the '\0' terminated string data. | |
192 | * (2) "hash" is full_name_hash(name, strlen(name)). | |
193 | * This allows tomoyo_pathcmp() to compare by hash before actually compare | |
194 | * using strcmp(). | |
195 | * (3) "const_len" is the length of the initial segment of "name" which | |
196 | * consists entirely of non wildcard characters. In other words, the length | |
197 | * which we can compare two strings using strncmp(). | |
198 | * (4) "is_dir" is a bool which is true if "name" ends with "/", | |
199 | * false otherwise. | |
200 | * TOMOYO distinguishes directory and non-directory. A directory ends with | |
201 | * "/" and non-directory does not end with "/". | |
202 | * (5) "is_patterned" is a bool which is true if "name" contains wildcard | |
203 | * characters, false otherwise. This allows TOMOYO to use "hash" and | |
204 | * strcmp() for string comparison if "is_patterned" is false. | |
c3fa109a | 205 | */ |
9590837b KT |
206 | struct tomoyo_path_info { |
207 | const char *name; | |
208 | u32 hash; /* = full_name_hash(name, strlen(name)) */ | |
9590837b KT |
209 | u16 const_len; /* = tomoyo_const_part_length(name) */ |
210 | bool is_dir; /* = tomoyo_strendswith(name, "/") */ | |
211 | bool is_patterned; /* = tomoyo_path_contains_pattern(name) */ | |
9590837b KT |
212 | }; |
213 | ||
214 | /* | |
76bb0895 TH |
215 | * tomoyo_name_entry is a structure which is used for linking |
216 | * "struct tomoyo_path_info" into tomoyo_name_list . | |
9590837b | 217 | */ |
76bb0895 TH |
218 | struct tomoyo_name_entry { |
219 | struct list_head list; | |
220 | atomic_t users; | |
221 | struct tomoyo_path_info entry; | |
222 | }; | |
9590837b | 223 | |
c3fa109a TH |
224 | /* |
225 | * tomoyo_path_info_with_data is a structure which is used for holding a | |
226 | * pathname obtained from "struct dentry" and "struct vfsmount" pair. | |
227 | * | |
228 | * "struct tomoyo_path_info_with_data" consists of "struct tomoyo_path_info" | |
229 | * and buffer for the pathname, while "struct tomoyo_page_buffer" consists of | |
230 | * buffer for the pathname only. | |
231 | * | |
232 | * "struct tomoyo_path_info_with_data" is intended to allow TOMOYO to release | |
233 | * both "struct tomoyo_path_info" and buffer for the pathname by single kfree() | |
234 | * so that we don't need to return two pointers to the caller. If the caller | |
235 | * puts "struct tomoyo_path_info" on stack memory, we will be able to remove | |
236 | * "struct tomoyo_path_info_with_data". | |
237 | */ | |
9590837b | 238 | struct tomoyo_path_info_with_data { |
8e2d39a1 | 239 | /* Keep "head" first, for this pointer is passed to kfree(). */ |
9590837b | 240 | struct tomoyo_path_info head; |
a106cbfd | 241 | char barrier1[16]; /* Safeguard for overrun. */ |
9590837b KT |
242 | char body[TOMOYO_MAX_PATHNAME_LEN]; |
243 | char barrier2[16]; /* Safeguard for overrun. */ | |
244 | }; | |
245 | ||
7762fbff TH |
246 | struct tomoyo_name_union { |
247 | const struct tomoyo_path_info *filename; | |
248 | struct tomoyo_path_group *group; | |
249 | u8 is_group; | |
250 | }; | |
251 | ||
4c3e9e2d TH |
252 | struct tomoyo_number_union { |
253 | unsigned long values[2]; | |
254 | struct tomoyo_number_group *group; | |
255 | u8 min_type; | |
256 | u8 max_type; | |
257 | u8 is_group; | |
258 | }; | |
259 | ||
7762fbff TH |
260 | /* Structure for "path_group" directive. */ |
261 | struct tomoyo_path_group { | |
262 | struct list_head list; | |
263 | const struct tomoyo_path_info *group_name; | |
264 | struct list_head member_list; | |
265 | atomic_t users; | |
266 | }; | |
267 | ||
4c3e9e2d TH |
268 | /* Structure for "number_group" directive. */ |
269 | struct tomoyo_number_group { | |
270 | struct list_head list; | |
271 | const struct tomoyo_path_info *group_name; | |
272 | struct list_head member_list; | |
273 | atomic_t users; | |
274 | }; | |
275 | ||
7762fbff TH |
276 | /* Structure for "path_group" directive. */ |
277 | struct tomoyo_path_group_member { | |
278 | struct list_head list; | |
279 | bool is_deleted; | |
280 | const struct tomoyo_path_info *member_name; | |
281 | }; | |
282 | ||
4c3e9e2d TH |
283 | /* Structure for "number_group" directive. */ |
284 | struct tomoyo_number_group_member { | |
285 | struct list_head list; | |
286 | bool is_deleted; | |
287 | struct tomoyo_number_union number; | |
288 | }; | |
289 | ||
9590837b | 290 | /* |
c3fa109a TH |
291 | * tomoyo_acl_info is a structure which is used for holding |
292 | * | |
293 | * (1) "list" which is linked to the ->acl_info_list of | |
294 | * "struct tomoyo_domain_info" | |
ea13ddba | 295 | * (2) "type" which tells type of the entry (either |
7ef61233 | 296 | * "struct tomoyo_path_acl" or "struct tomoyo_path2_acl"). |
9590837b KT |
297 | * |
298 | * Packing "struct tomoyo_acl_info" allows | |
7ef61233 TH |
299 | * "struct tomoyo_path_acl" to embed "u8" + "u16" and |
300 | * "struct tomoyo_path2_acl" to embed "u8" | |
9590837b KT |
301 | * without enlarging their structure size. |
302 | */ | |
303 | struct tomoyo_acl_info { | |
304 | struct list_head list; | |
9590837b KT |
305 | u8 type; |
306 | } __packed; | |
307 | ||
c3fa109a TH |
308 | /* |
309 | * tomoyo_domain_info is a structure which is used for holding permissions | |
310 | * (e.g. "allow_read /lib/libc-2.5.so") given to each domain. | |
311 | * It has following fields. | |
312 | * | |
313 | * (1) "list" which is linked to tomoyo_domain_list . | |
314 | * (2) "acl_info_list" which is linked to "struct tomoyo_acl_info". | |
315 | * (3) "domainname" which holds the name of the domain. | |
316 | * (4) "profile" which remembers profile number assigned to this domain. | |
317 | * (5) "is_deleted" is a bool which is true if this domain is marked as | |
318 | * "deleted", false otherwise. | |
319 | * (6) "quota_warned" is a bool which is used for suppressing warning message | |
320 | * when learning mode learned too much entries. | |
ea13ddba TH |
321 | * (7) "ignore_global_allow_read" is a bool which is true if this domain |
322 | * should ignore "allow_read" directive in exception policy. | |
323 | * (8) "transition_failed" is a bool which is set to true when this domain was | |
324 | * unable to create a new domain at tomoyo_find_next_domain() because the | |
325 | * name of the domain to be created was too long or it could not allocate | |
326 | * memory. If set to true, more than one process continued execve() | |
327 | * without domain transition. | |
ec8e6a4e TH |
328 | * (9) "users" is an atomic_t that holds how many "struct cred"->security |
329 | * are referring this "struct tomoyo_domain_info". If is_deleted == true | |
330 | * and users == 0, this struct will be kfree()d upon next garbage | |
331 | * collection. | |
c3fa109a TH |
332 | * |
333 | * A domain's lifecycle is an analogy of files on / directory. | |
334 | * Multiple domains with the same domainname cannot be created (as with | |
335 | * creating files with the same filename fails with -EEXIST). | |
336 | * If a process reached a domain, that process can reside in that domain after | |
337 | * that domain is marked as "deleted" (as with a process can access an already | |
338 | * open()ed file after that file was unlink()ed). | |
339 | */ | |
9590837b KT |
340 | struct tomoyo_domain_info { |
341 | struct list_head list; | |
342 | struct list_head acl_info_list; | |
343 | /* Name of this domain. Never NULL. */ | |
344 | const struct tomoyo_path_info *domainname; | |
345 | u8 profile; /* Profile number to use. */ | |
a0558fc3 | 346 | bool is_deleted; /* Delete flag. */ |
9590837b | 347 | bool quota_warned; /* Quota warnning flag. */ |
ea13ddba TH |
348 | bool ignore_global_allow_read; /* Ignore "allow_read" flag. */ |
349 | bool transition_failed; /* Domain transition failed flag. */ | |
ec8e6a4e | 350 | atomic_t users; /* Number of referring credentials. */ |
9590837b KT |
351 | }; |
352 | ||
9590837b | 353 | /* |
7ef61233 | 354 | * tomoyo_path_acl is a structure which is used for holding an |
c3fa109a TH |
355 | * entry with one pathname operation (e.g. open(), mkdir()). |
356 | * It has following fields. | |
357 | * | |
358 | * (1) "head" which is a "struct tomoyo_acl_info". | |
359 | * (2) "perm" which is a bitmask of permitted operations. | |
7762fbff | 360 | * (3) "name" is the pathname. |
c3fa109a TH |
361 | * |
362 | * Directives held by this structure are "allow_read/write", "allow_execute", | |
a1f9bb6a | 363 | * "allow_read", "allow_write", "allow_unlink", "allow_rmdir", |
2106ccd9 TH |
364 | * "allow_truncate", "allow_symlink", "allow_rewrite", "allow_chroot" and |
365 | * "allow_unmount". | |
9590837b | 366 | */ |
7ef61233 TH |
367 | struct tomoyo_path_acl { |
368 | struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */ | |
9590837b | 369 | u16 perm; |
7762fbff | 370 | struct tomoyo_name_union name; |
9590837b KT |
371 | }; |
372 | ||
a1f9bb6a TH |
373 | /* |
374 | * tomoyo_path_number_acl is a structure which is used for holding an | |
375 | * entry with one pathname and one number operation. | |
376 | * It has following fields. | |
377 | * | |
378 | * (1) "head" which is a "struct tomoyo_acl_info". | |
379 | * (2) "perm" which is a bitmask of permitted operations. | |
380 | * (3) "name" is the pathname. | |
381 | * (4) "number" is the numeric value. | |
382 | * | |
383 | * Directives held by this structure are "allow_create", "allow_mkdir", | |
384 | * "allow_ioctl", "allow_mkfifo", "allow_mksock", "allow_chmod", "allow_chown" | |
385 | * and "allow_chgrp". | |
386 | * | |
387 | */ | |
388 | struct tomoyo_path_number_acl { | |
389 | struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_NUMBER_ACL */ | |
390 | u8 perm; | |
391 | struct tomoyo_name_union name; | |
392 | struct tomoyo_number_union number; | |
393 | }; | |
394 | ||
395 | /* | |
396 | * tomoyo_path_number3_acl is a structure which is used for holding an | |
397 | * entry with one pathname and three numbers operation. | |
398 | * It has following fields. | |
399 | * | |
400 | * (1) "head" which is a "struct tomoyo_acl_info". | |
401 | * (2) "perm" which is a bitmask of permitted operations. | |
402 | * (3) "mode" is the create mode. | |
403 | * (4) "major" is the major number of device node. | |
404 | * (5) "minor" is the minor number of device node. | |
405 | * | |
406 | * Directives held by this structure are "allow_mkchar", "allow_mkblock". | |
407 | * | |
408 | */ | |
409 | struct tomoyo_path_number3_acl { | |
410 | struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_NUMBER3_ACL */ | |
411 | u8 perm; | |
412 | struct tomoyo_name_union name; | |
413 | struct tomoyo_number_union mode; | |
414 | struct tomoyo_number_union major; | |
415 | struct tomoyo_number_union minor; | |
416 | }; | |
417 | ||
c3fa109a | 418 | /* |
7ef61233 | 419 | * tomoyo_path2_acl is a structure which is used for holding an |
937bf613 | 420 | * entry with two pathnames operation (i.e. link(), rename() and pivot_root()). |
c3fa109a TH |
421 | * It has following fields. |
422 | * | |
423 | * (1) "head" which is a "struct tomoyo_acl_info". | |
424 | * (2) "perm" which is a bitmask of permitted operations. | |
7762fbff TH |
425 | * (3) "name1" is the source/old pathname. |
426 | * (4) "name2" is the destination/new pathname. | |
c3fa109a | 427 | * |
937bf613 TH |
428 | * Directives held by this structure are "allow_rename", "allow_link" and |
429 | * "allow_pivot_root". | |
c3fa109a | 430 | */ |
7ef61233 TH |
431 | struct tomoyo_path2_acl { |
432 | struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */ | |
9590837b | 433 | u8 perm; |
7762fbff TH |
434 | struct tomoyo_name_union name1; |
435 | struct tomoyo_name_union name2; | |
9590837b KT |
436 | }; |
437 | ||
2106ccd9 TH |
438 | /* |
439 | * tomoyo_mount_acl is a structure which is used for holding an | |
440 | * entry for mount operation. | |
441 | * It has following fields. | |
442 | * | |
443 | * (1) "head" which is a "struct tomoyo_acl_info". | |
444 | * (2) "is_deleted" is boolean. | |
445 | * (3) "dev_name" is the device name. | |
446 | * (4) "dir_name" is the mount point. | |
447 | * (5) "flags" is the mount flags. | |
448 | * | |
449 | * Directives held by this structure are "allow_rename", "allow_link" and | |
450 | * "allow_pivot_root". | |
451 | */ | |
452 | struct tomoyo_mount_acl { | |
453 | struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MOUNT_ACL */ | |
454 | bool is_deleted; | |
455 | struct tomoyo_name_union dev_name; | |
456 | struct tomoyo_name_union dir_name; | |
457 | struct tomoyo_name_union fs_type; | |
458 | struct tomoyo_number_union flags; | |
459 | }; | |
460 | ||
c3fa109a TH |
461 | /* |
462 | * tomoyo_io_buffer is a structure which is used for reading and modifying | |
463 | * configuration via /sys/kernel/security/tomoyo/ interface. | |
464 | * It has many fields. ->read_var1 , ->read_var2 , ->write_var1 are used as | |
465 | * cursors. | |
466 | * | |
467 | * Since the content of /sys/kernel/security/tomoyo/domain_policy is a list of | |
468 | * "struct tomoyo_domain_info" entries and each "struct tomoyo_domain_info" | |
469 | * entry has a list of "struct tomoyo_acl_info", we need two cursors when | |
470 | * reading (one is for traversing tomoyo_domain_list and the other is for | |
471 | * traversing "struct tomoyo_acl_info"->acl_info_list ). | |
472 | * | |
473 | * If a line written to /sys/kernel/security/tomoyo/domain_policy starts with | |
474 | * "select ", TOMOYO seeks the cursor ->read_var1 and ->write_var1 to the | |
475 | * domain with the domainname specified by the rest of that line (NULL is set | |
476 | * if seek failed). | |
477 | * If a line written to /sys/kernel/security/tomoyo/domain_policy starts with | |
478 | * "delete ", TOMOYO deletes an entry or a domain specified by the rest of that | |
479 | * line (->write_var1 is set to NULL if a domain was deleted). | |
480 | * If a line written to /sys/kernel/security/tomoyo/domain_policy starts with | |
481 | * neither "select " nor "delete ", an entry or a domain specified by that line | |
482 | * is appended. | |
483 | */ | |
9590837b KT |
484 | struct tomoyo_io_buffer { |
485 | int (*read) (struct tomoyo_io_buffer *); | |
486 | int (*write) (struct tomoyo_io_buffer *); | |
487 | /* Exclusive lock for this structure. */ | |
488 | struct mutex io_sem; | |
fdb8ebb7 TH |
489 | /* Index returned by tomoyo_read_lock(). */ |
490 | int reader_idx; | |
9590837b KT |
491 | /* The position currently reading from. */ |
492 | struct list_head *read_var1; | |
493 | /* Extra variables for reading. */ | |
494 | struct list_head *read_var2; | |
495 | /* The position currently writing to. */ | |
496 | struct tomoyo_domain_info *write_var1; | |
497 | /* The step for reading. */ | |
498 | int read_step; | |
499 | /* Buffer for reading. */ | |
500 | char *read_buf; | |
501 | /* EOF flag for reading. */ | |
502 | bool read_eof; | |
503 | /* Read domain ACL of specified PID? */ | |
504 | bool read_single_domain; | |
505 | /* Extra variable for reading. */ | |
506 | u8 read_bit; | |
507 | /* Bytes available for reading. */ | |
508 | int read_avail; | |
509 | /* Size of read buffer. */ | |
510 | int readbuf_size; | |
511 | /* Buffer for writing. */ | |
512 | char *write_buf; | |
513 | /* Bytes available for writing. */ | |
514 | int write_avail; | |
515 | /* Size of write buffer. */ | |
516 | int writebuf_size; | |
517 | }; | |
518 | ||
76bb0895 TH |
519 | /* |
520 | * tomoyo_globally_readable_file_entry is a structure which is used for holding | |
521 | * "allow_read" entries. | |
522 | * It has following fields. | |
523 | * | |
524 | * (1) "list" which is linked to tomoyo_globally_readable_list . | |
525 | * (2) "filename" is a pathname which is allowed to open(O_RDONLY). | |
526 | * (3) "is_deleted" is a bool which is true if marked as deleted, false | |
527 | * otherwise. | |
528 | */ | |
529 | struct tomoyo_globally_readable_file_entry { | |
530 | struct list_head list; | |
531 | const struct tomoyo_path_info *filename; | |
532 | bool is_deleted; | |
533 | }; | |
534 | ||
535 | /* | |
536 | * tomoyo_pattern_entry is a structure which is used for holding | |
537 | * "tomoyo_pattern_list" entries. | |
538 | * It has following fields. | |
539 | * | |
540 | * (1) "list" which is linked to tomoyo_pattern_list . | |
541 | * (2) "pattern" is a pathname pattern which is used for converting pathnames | |
542 | * to pathname patterns during learning mode. | |
543 | * (3) "is_deleted" is a bool which is true if marked as deleted, false | |
544 | * otherwise. | |
545 | */ | |
546 | struct tomoyo_pattern_entry { | |
547 | struct list_head list; | |
548 | const struct tomoyo_path_info *pattern; | |
549 | bool is_deleted; | |
550 | }; | |
551 | ||
552 | /* | |
553 | * tomoyo_no_rewrite_entry is a structure which is used for holding | |
554 | * "deny_rewrite" entries. | |
555 | * It has following fields. | |
556 | * | |
557 | * (1) "list" which is linked to tomoyo_no_rewrite_list . | |
558 | * (2) "pattern" is a pathname which is by default not permitted to modify | |
559 | * already existing content. | |
560 | * (3) "is_deleted" is a bool which is true if marked as deleted, false | |
561 | * otherwise. | |
562 | */ | |
563 | struct tomoyo_no_rewrite_entry { | |
564 | struct list_head list; | |
565 | const struct tomoyo_path_info *pattern; | |
566 | bool is_deleted; | |
567 | }; | |
568 | ||
569 | /* | |
570 | * tomoyo_domain_initializer_entry is a structure which is used for holding | |
571 | * "initialize_domain" and "no_initialize_domain" entries. | |
572 | * It has following fields. | |
573 | * | |
574 | * (1) "list" which is linked to tomoyo_domain_initializer_list . | |
575 | * (2) "domainname" which is "a domainname" or "the last component of a | |
576 | * domainname". This field is NULL if "from" clause is not specified. | |
577 | * (3) "program" which is a program's pathname. | |
578 | * (4) "is_deleted" is a bool which is true if marked as deleted, false | |
579 | * otherwise. | |
580 | * (5) "is_not" is a bool which is true if "no_initialize_domain", false | |
581 | * otherwise. | |
582 | * (6) "is_last_name" is a bool which is true if "domainname" is "the last | |
583 | * component of a domainname", false otherwise. | |
584 | */ | |
585 | struct tomoyo_domain_initializer_entry { | |
586 | struct list_head list; | |
587 | const struct tomoyo_path_info *domainname; /* This may be NULL */ | |
588 | const struct tomoyo_path_info *program; | |
589 | bool is_deleted; | |
590 | bool is_not; /* True if this entry is "no_initialize_domain". */ | |
591 | /* True if the domainname is tomoyo_get_last_name(). */ | |
592 | bool is_last_name; | |
593 | }; | |
594 | ||
595 | /* | |
596 | * tomoyo_domain_keeper_entry is a structure which is used for holding | |
597 | * "keep_domain" and "no_keep_domain" entries. | |
598 | * It has following fields. | |
599 | * | |
600 | * (1) "list" which is linked to tomoyo_domain_keeper_list . | |
601 | * (2) "domainname" which is "a domainname" or "the last component of a | |
602 | * domainname". | |
603 | * (3) "program" which is a program's pathname. | |
604 | * This field is NULL if "from" clause is not specified. | |
605 | * (4) "is_deleted" is a bool which is true if marked as deleted, false | |
606 | * otherwise. | |
607 | * (5) "is_not" is a bool which is true if "no_initialize_domain", false | |
608 | * otherwise. | |
609 | * (6) "is_last_name" is a bool which is true if "domainname" is "the last | |
610 | * component of a domainname", false otherwise. | |
611 | */ | |
612 | struct tomoyo_domain_keeper_entry { | |
613 | struct list_head list; | |
614 | const struct tomoyo_path_info *domainname; | |
615 | const struct tomoyo_path_info *program; /* This may be NULL */ | |
616 | bool is_deleted; | |
617 | bool is_not; /* True if this entry is "no_keep_domain". */ | |
618 | /* True if the domainname is tomoyo_get_last_name(). */ | |
619 | bool is_last_name; | |
620 | }; | |
621 | ||
622 | /* | |
623 | * tomoyo_alias_entry is a structure which is used for holding "alias" entries. | |
624 | * It has following fields. | |
625 | * | |
626 | * (1) "list" which is linked to tomoyo_alias_list . | |
627 | * (2) "original_name" which is a dereferenced pathname. | |
628 | * (3) "aliased_name" which is a symlink's pathname. | |
629 | * (4) "is_deleted" is a bool which is true if marked as deleted, false | |
630 | * otherwise. | |
631 | */ | |
632 | struct tomoyo_alias_entry { | |
633 | struct list_head list; | |
634 | const struct tomoyo_path_info *original_name; | |
635 | const struct tomoyo_path_info *aliased_name; | |
636 | bool is_deleted; | |
637 | }; | |
638 | ||
639 | /* | |
640 | * tomoyo_policy_manager_entry is a structure which is used for holding list of | |
641 | * domainnames or programs which are permitted to modify configuration via | |
642 | * /sys/kernel/security/tomoyo/ interface. | |
643 | * It has following fields. | |
644 | * | |
645 | * (1) "list" which is linked to tomoyo_policy_manager_list . | |
646 | * (2) "manager" is a domainname or a program's pathname. | |
647 | * (3) "is_domain" is a bool which is true if "manager" is a domainname, false | |
648 | * otherwise. | |
649 | * (4) "is_deleted" is a bool which is true if marked as deleted, false | |
650 | * otherwise. | |
651 | */ | |
652 | struct tomoyo_policy_manager_entry { | |
653 | struct list_head list; | |
654 | /* A path to program or a domainname. */ | |
655 | const struct tomoyo_path_info *manager; | |
656 | bool is_domain; /* True if manager is a domainname. */ | |
657 | bool is_deleted; /* True if this entry is deleted. */ | |
658 | }; | |
659 | ||
660 | /********** Function prototypes. **********/ | |
661 | ||
7762fbff TH |
662 | /* Check whether the given name matches the given name_union. */ |
663 | bool tomoyo_compare_name_union(const struct tomoyo_path_info *name, | |
664 | const struct tomoyo_name_union *ptr); | |
2106ccd9 TH |
665 | /* Check whether the given number matches the given number_union. */ |
666 | bool tomoyo_compare_number_union(const unsigned long value, | |
667 | const struct tomoyo_number_union *ptr); | |
9590837b | 668 | /* Check whether the domain has too many ACL entries to hold. */ |
cb0abe6a | 669 | bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r); |
9590837b KT |
670 | /* Transactional sprintf() for policy dump. */ |
671 | bool tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...) | |
672 | __attribute__ ((format(printf, 2, 3))); | |
673 | /* Check whether the domainname is correct. */ | |
17080008 | 674 | bool tomoyo_is_correct_domain(const unsigned char *domainname); |
9590837b KT |
675 | /* Check whether the token is correct. */ |
676 | bool tomoyo_is_correct_path(const char *filename, const s8 start_type, | |
17080008 | 677 | const s8 pattern_type, const s8 end_type); |
9590837b KT |
678 | /* Check whether the token can be a domainname. */ |
679 | bool tomoyo_is_domain_def(const unsigned char *buffer); | |
7762fbff TH |
680 | bool tomoyo_parse_name_union(const char *filename, |
681 | struct tomoyo_name_union *ptr); | |
682 | /* Check whether the given filename matches the given path_group. */ | |
683 | bool tomoyo_path_matches_group(const struct tomoyo_path_info *pathname, | |
684 | const struct tomoyo_path_group *group, | |
685 | const bool may_use_pattern); | |
4c3e9e2d TH |
686 | /* Check whether the given value matches the given number_group. */ |
687 | bool tomoyo_number_matches_group(const unsigned long min, | |
688 | const unsigned long max, | |
689 | const struct tomoyo_number_group *group); | |
9590837b KT |
690 | /* Check whether the given filename matches the given pattern. */ |
691 | bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename, | |
692 | const struct tomoyo_path_info *pattern); | |
4c3e9e2d TH |
693 | |
694 | bool tomoyo_print_number_union(struct tomoyo_io_buffer *head, | |
695 | const struct tomoyo_number_union *ptr); | |
696 | bool tomoyo_parse_number_union(char *data, struct tomoyo_number_union *num); | |
697 | ||
9590837b KT |
698 | /* Read "alias" entry in exception policy. */ |
699 | bool tomoyo_read_alias_policy(struct tomoyo_io_buffer *head); | |
700 | /* | |
701 | * Read "initialize_domain" and "no_initialize_domain" entry | |
702 | * in exception policy. | |
703 | */ | |
704 | bool tomoyo_read_domain_initializer_policy(struct tomoyo_io_buffer *head); | |
705 | /* Read "keep_domain" and "no_keep_domain" entry in exception policy. */ | |
706 | bool tomoyo_read_domain_keeper_policy(struct tomoyo_io_buffer *head); | |
707 | /* Read "file_pattern" entry in exception policy. */ | |
708 | bool tomoyo_read_file_pattern(struct tomoyo_io_buffer *head); | |
7762fbff TH |
709 | /* Read "path_group" entry in exception policy. */ |
710 | bool tomoyo_read_path_group_policy(struct tomoyo_io_buffer *head); | |
4c3e9e2d TH |
711 | /* Read "number_group" entry in exception policy. */ |
712 | bool tomoyo_read_number_group_policy(struct tomoyo_io_buffer *head); | |
9590837b KT |
713 | /* Read "allow_read" entry in exception policy. */ |
714 | bool tomoyo_read_globally_readable_policy(struct tomoyo_io_buffer *head); | |
715 | /* Read "deny_rewrite" entry in exception policy. */ | |
716 | bool tomoyo_read_no_rewrite_policy(struct tomoyo_io_buffer *head); | |
7762fbff TH |
717 | /* Tokenize a line. */ |
718 | bool tomoyo_tokenize(char *buffer, char *w[], size_t size); | |
9590837b KT |
719 | /* Write domain policy violation warning message to console? */ |
720 | bool tomoyo_verbose_mode(const struct tomoyo_domain_info *domain); | |
721 | /* Convert double path operation to operation name. */ | |
7ef61233 | 722 | const char *tomoyo_path22keyword(const u8 operation); |
a1f9bb6a TH |
723 | const char *tomoyo_path_number2keyword(const u8 operation); |
724 | const char *tomoyo_path_number32keyword(const u8 operation); | |
9590837b KT |
725 | /* Get the last component of the given domainname. */ |
726 | const char *tomoyo_get_last_name(const struct tomoyo_domain_info *domain); | |
9590837b | 727 | /* Convert single path operation to operation name. */ |
7ef61233 | 728 | const char *tomoyo_path2keyword(const u8 operation); |
2106ccd9 TH |
729 | /* Fill "struct tomoyo_request_info". */ |
730 | int tomoyo_init_request_info(struct tomoyo_request_info *r, | |
731 | struct tomoyo_domain_info *domain); | |
732 | /* Check permission for mount operation. */ | |
733 | int tomoyo_mount_permission(char *dev_name, struct path *path, char *type, | |
734 | unsigned long flags, void *data_page); | |
9590837b KT |
735 | /* Create "alias" entry in exception policy. */ |
736 | int tomoyo_write_alias_policy(char *data, const bool is_delete); | |
737 | /* | |
738 | * Create "initialize_domain" and "no_initialize_domain" entry | |
739 | * in exception policy. | |
740 | */ | |
741 | int tomoyo_write_domain_initializer_policy(char *data, const bool is_not, | |
742 | const bool is_delete); | |
743 | /* Create "keep_domain" and "no_keep_domain" entry in exception policy. */ | |
744 | int tomoyo_write_domain_keeper_policy(char *data, const bool is_not, | |
745 | const bool is_delete); | |
746 | /* | |
747 | * Create "allow_read/write", "allow_execute", "allow_read", "allow_write", | |
748 | * "allow_create", "allow_unlink", "allow_mkdir", "allow_rmdir", | |
749 | * "allow_mkfifo", "allow_mksock", "allow_mkblock", "allow_mkchar", | |
750 | * "allow_truncate", "allow_symlink", "allow_rewrite", "allow_rename" and | |
751 | * "allow_link" entry in domain policy. | |
752 | */ | |
753 | int tomoyo_write_file_policy(char *data, struct tomoyo_domain_info *domain, | |
754 | const bool is_delete); | |
755 | /* Create "allow_read" entry in exception policy. */ | |
756 | int tomoyo_write_globally_readable_policy(char *data, const bool is_delete); | |
2106ccd9 TH |
757 | /* Create "allow_mount" entry in domain policy. */ |
758 | int tomoyo_write_mount_policy(char *data, struct tomoyo_domain_info *domain, | |
759 | const bool is_delete); | |
9590837b KT |
760 | /* Create "deny_rewrite" entry in exception policy. */ |
761 | int tomoyo_write_no_rewrite_policy(char *data, const bool is_delete); | |
762 | /* Create "file_pattern" entry in exception policy. */ | |
763 | int tomoyo_write_pattern_policy(char *data, const bool is_delete); | |
7762fbff TH |
764 | /* Create "path_group" entry in exception policy. */ |
765 | int tomoyo_write_path_group_policy(char *data, const bool is_delete); | |
4c3e9e2d TH |
766 | /* Create "number_group" entry in exception policy. */ |
767 | int tomoyo_write_number_group_policy(char *data, const bool is_delete); | |
9590837b KT |
768 | /* Find a domain by the given name. */ |
769 | struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname); | |
770 | /* Find or create a domain by the given name. */ | |
771 | struct tomoyo_domain_info *tomoyo_find_or_assign_new_domain(const char * | |
772 | domainname, | |
773 | const u8 profile); | |
2106ccd9 TH |
774 | /* Get patterned pathname. */ |
775 | const struct tomoyo_path_info * | |
776 | tomoyo_get_file_pattern(const struct tomoyo_path_info *filename); | |
7762fbff TH |
777 | /* Allocate memory for "struct tomoyo_path_group". */ |
778 | struct tomoyo_path_group *tomoyo_get_path_group(const char *group_name); | |
4c3e9e2d | 779 | struct tomoyo_number_group *tomoyo_get_number_group(const char *group_name); |
7762fbff | 780 | |
9590837b KT |
781 | /* Check mode for specified functionality. */ |
782 | unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain, | |
783 | const u8 index); | |
9590837b KT |
784 | /* Fill in "struct tomoyo_path_info" members. */ |
785 | void tomoyo_fill_path_info(struct tomoyo_path_info *ptr); | |
786 | /* Run policy loader when /sbin/init starts. */ | |
787 | void tomoyo_load_policy(const char *filename); | |
9590837b | 788 | |
4c3e9e2d TH |
789 | void tomoyo_put_number_union(struct tomoyo_number_union *ptr); |
790 | ||
76bb0895 TH |
791 | /* Convert binary string to ascii string. */ |
792 | int tomoyo_encode(char *buffer, int buflen, const char *str); | |
793 | ||
794 | /* Returns realpath(3) of the given pathname but ignores chroot'ed root. */ | |
795 | int tomoyo_realpath_from_path2(struct path *path, char *newname, | |
796 | int newname_len); | |
797 | ||
798 | /* | |
799 | * Returns realpath(3) of the given pathname but ignores chroot'ed root. | |
800 | * These functions use kzalloc(), so the caller must call kfree() | |
801 | * if these functions didn't return NULL. | |
802 | */ | |
803 | char *tomoyo_realpath(const char *pathname); | |
804 | /* | |
805 | * Same with tomoyo_realpath() except that it doesn't follow the final symlink. | |
806 | */ | |
807 | char *tomoyo_realpath_nofollow(const char *pathname); | |
808 | /* Same with tomoyo_realpath() except that the pathname is already solved. */ | |
809 | char *tomoyo_realpath_from_path(struct path *path); | |
810 | ||
811 | /* Check memory quota. */ | |
812 | bool tomoyo_memory_ok(void *ptr); | |
9e4b50e9 | 813 | void *tomoyo_commit_ok(void *data, const unsigned int size); |
76bb0895 TH |
814 | |
815 | /* | |
816 | * Keep the given name on the RAM. | |
817 | * The RAM is shared, so NEVER try to modify or kfree() the returned name. | |
818 | */ | |
819 | const struct tomoyo_path_info *tomoyo_get_name(const char *name); | |
820 | ||
821 | /* Check for memory usage. */ | |
822 | int tomoyo_read_memory_counter(struct tomoyo_io_buffer *head); | |
823 | ||
824 | /* Set memory quota. */ | |
825 | int tomoyo_write_memory_quota(struct tomoyo_io_buffer *head); | |
826 | ||
827 | /* Initialize realpath related code. */ | |
828 | void __init tomoyo_realpath_init(void); | |
829 | int tomoyo_check_exec_perm(struct tomoyo_domain_info *domain, | |
830 | const struct tomoyo_path_info *filename); | |
831 | int tomoyo_check_open_permission(struct tomoyo_domain_info *domain, | |
832 | struct path *path, const int flag); | |
a1f9bb6a TH |
833 | int tomoyo_path_number_perm(const u8 operation, struct path *path, |
834 | unsigned long number); | |
835 | int tomoyo_path_number3_perm(const u8 operation, struct path *path, | |
836 | const unsigned int mode, unsigned int dev); | |
97d6931e TH |
837 | int tomoyo_path_perm(const u8 operation, struct path *path); |
838 | int tomoyo_path2_perm(const u8 operation, struct path *path1, | |
839 | struct path *path2); | |
76bb0895 TH |
840 | int tomoyo_find_next_domain(struct linux_binprm *bprm); |
841 | ||
a1f9bb6a TH |
842 | void tomoyo_print_ulong(char *buffer, const int buffer_len, |
843 | const unsigned long value, const u8 type); | |
844 | ||
7762fbff TH |
845 | /* Drop refcount on tomoyo_name_union. */ |
846 | void tomoyo_put_name_union(struct tomoyo_name_union *ptr); | |
847 | ||
847b173e TH |
848 | /* Run garbage collector. */ |
849 | void tomoyo_run_gc(void); | |
850 | ||
851 | void tomoyo_memory_free(void *ptr); | |
852 | ||
76bb0895 TH |
853 | /********** External variable definitions. **********/ |
854 | ||
855 | /* Lock for GC. */ | |
856 | extern struct srcu_struct tomoyo_ss; | |
857 | ||
858 | /* The list for "struct tomoyo_domain_info". */ | |
859 | extern struct list_head tomoyo_domain_list; | |
860 | ||
7762fbff | 861 | extern struct list_head tomoyo_path_group_list; |
4c3e9e2d | 862 | extern struct list_head tomoyo_number_group_list; |
847b173e TH |
863 | extern struct list_head tomoyo_domain_initializer_list; |
864 | extern struct list_head tomoyo_domain_keeper_list; | |
865 | extern struct list_head tomoyo_alias_list; | |
866 | extern struct list_head tomoyo_globally_readable_list; | |
867 | extern struct list_head tomoyo_pattern_list; | |
868 | extern struct list_head tomoyo_no_rewrite_list; | |
869 | extern struct list_head tomoyo_policy_manager_list; | |
870 | extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH]; | |
847b173e | 871 | |
76bb0895 TH |
872 | /* Lock for protecting policy. */ |
873 | extern struct mutex tomoyo_policy_lock; | |
874 | ||
875 | /* Has /sbin/init started? */ | |
876 | extern bool tomoyo_policy_loaded; | |
877 | ||
878 | /* The kernel's domain. */ | |
879 | extern struct tomoyo_domain_info tomoyo_kernel_domain; | |
880 | ||
881 | /********** Inlined functions. **********/ | |
882 | ||
883 | static inline int tomoyo_read_lock(void) | |
884 | { | |
885 | return srcu_read_lock(&tomoyo_ss); | |
886 | } | |
887 | ||
888 | static inline void tomoyo_read_unlock(int idx) | |
889 | { | |
890 | srcu_read_unlock(&tomoyo_ss, idx); | |
891 | } | |
892 | ||
9590837b KT |
893 | /* strcmp() for "struct tomoyo_path_info" structure. */ |
894 | static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a, | |
895 | const struct tomoyo_path_info *b) | |
896 | { | |
897 | return a->hash != b->hash || strcmp(a->name, b->name); | |
898 | } | |
899 | ||
9590837b KT |
900 | /** |
901 | * tomoyo_is_valid - Check whether the character is a valid char. | |
902 | * | |
903 | * @c: The character to check. | |
904 | * | |
905 | * Returns true if @c is a valid character, false otherwise. | |
906 | */ | |
907 | static inline bool tomoyo_is_valid(const unsigned char c) | |
908 | { | |
909 | return c > ' ' && c < 127; | |
910 | } | |
911 | ||
912 | /** | |
913 | * tomoyo_is_invalid - Check whether the character is an invalid char. | |
914 | * | |
915 | * @c: The character to check. | |
916 | * | |
917 | * Returns true if @c is an invalid character, false otherwise. | |
918 | */ | |
919 | static inline bool tomoyo_is_invalid(const unsigned char c) | |
920 | { | |
921 | return c && (c <= ' ' || c >= 127); | |
922 | } | |
923 | ||
76bb0895 TH |
924 | static inline void tomoyo_put_name(const struct tomoyo_path_info *name) |
925 | { | |
926 | if (name) { | |
927 | struct tomoyo_name_entry *ptr = | |
928 | container_of(name, struct tomoyo_name_entry, entry); | |
929 | atomic_dec(&ptr->users); | |
930 | } | |
931 | } | |
9590837b | 932 | |
7762fbff TH |
933 | static inline void tomoyo_put_path_group(struct tomoyo_path_group *group) |
934 | { | |
935 | if (group) | |
936 | atomic_dec(&group->users); | |
937 | } | |
938 | ||
4c3e9e2d TH |
939 | static inline void tomoyo_put_number_group(struct tomoyo_number_group *group) |
940 | { | |
941 | if (group) | |
942 | atomic_dec(&group->users); | |
943 | } | |
944 | ||
76bb0895 TH |
945 | static inline struct tomoyo_domain_info *tomoyo_domain(void) |
946 | { | |
947 | return current_cred()->security; | |
948 | } | |
9590837b | 949 | |
76bb0895 TH |
950 | static inline struct tomoyo_domain_info *tomoyo_real_domain(struct task_struct |
951 | *task) | |
952 | { | |
953 | return task_cred_xxx(task, security); | |
954 | } | |
9590837b | 955 | |
7762fbff TH |
956 | static inline bool tomoyo_is_same_acl_head(const struct tomoyo_acl_info *p1, |
957 | const struct tomoyo_acl_info *p2) | |
958 | { | |
959 | return p1->type == p2->type; | |
960 | } | |
961 | ||
962 | static inline bool tomoyo_is_same_name_union | |
963 | (const struct tomoyo_name_union *p1, const struct tomoyo_name_union *p2) | |
964 | { | |
965 | return p1->filename == p2->filename && p1->group == p2->group && | |
966 | p1->is_group == p2->is_group; | |
967 | } | |
968 | ||
4c3e9e2d TH |
969 | static inline bool tomoyo_is_same_number_union |
970 | (const struct tomoyo_number_union *p1, const struct tomoyo_number_union *p2) | |
971 | { | |
972 | return p1->values[0] == p2->values[0] && p1->values[1] == p2->values[1] | |
973 | && p1->group == p2->group && p1->min_type == p2->min_type && | |
974 | p1->max_type == p2->max_type && p1->is_group == p2->is_group; | |
975 | } | |
976 | ||
7762fbff TH |
977 | static inline bool tomoyo_is_same_path_acl(const struct tomoyo_path_acl *p1, |
978 | const struct tomoyo_path_acl *p2) | |
979 | { | |
980 | return tomoyo_is_same_acl_head(&p1->head, &p2->head) && | |
981 | tomoyo_is_same_name_union(&p1->name, &p2->name); | |
982 | } | |
983 | ||
a1f9bb6a TH |
984 | static inline bool tomoyo_is_same_path_number3_acl |
985 | (const struct tomoyo_path_number3_acl *p1, | |
986 | const struct tomoyo_path_number3_acl *p2) | |
987 | { | |
988 | return tomoyo_is_same_acl_head(&p1->head, &p2->head) | |
989 | && tomoyo_is_same_name_union(&p1->name, &p2->name) | |
990 | && tomoyo_is_same_number_union(&p1->mode, &p2->mode) | |
991 | && tomoyo_is_same_number_union(&p1->major, &p2->major) | |
992 | && tomoyo_is_same_number_union(&p1->minor, &p2->minor); | |
993 | } | |
994 | ||
995 | ||
7762fbff TH |
996 | static inline bool tomoyo_is_same_path2_acl(const struct tomoyo_path2_acl *p1, |
997 | const struct tomoyo_path2_acl *p2) | |
998 | { | |
999 | return tomoyo_is_same_acl_head(&p1->head, &p2->head) && | |
1000 | tomoyo_is_same_name_union(&p1->name1, &p2->name1) && | |
1001 | tomoyo_is_same_name_union(&p1->name2, &p2->name2); | |
1002 | } | |
1003 | ||
a1f9bb6a TH |
1004 | static inline bool tomoyo_is_same_path_number_acl |
1005 | (const struct tomoyo_path_number_acl *p1, | |
1006 | const struct tomoyo_path_number_acl *p2) | |
1007 | { | |
1008 | return tomoyo_is_same_acl_head(&p1->head, &p2->head) | |
1009 | && tomoyo_is_same_name_union(&p1->name, &p2->name) | |
1010 | && tomoyo_is_same_number_union(&p1->number, &p2->number); | |
1011 | } | |
1012 | ||
2106ccd9 TH |
1013 | static inline bool tomoyo_is_same_mount_acl(const struct tomoyo_mount_acl *p1, |
1014 | const struct tomoyo_mount_acl *p2) | |
1015 | { | |
1016 | return tomoyo_is_same_acl_head(&p1->head, &p2->head) && | |
1017 | tomoyo_is_same_name_union(&p1->dev_name, &p2->dev_name) && | |
1018 | tomoyo_is_same_name_union(&p1->dir_name, &p2->dir_name) && | |
1019 | tomoyo_is_same_name_union(&p1->fs_type, &p2->fs_type) && | |
1020 | tomoyo_is_same_number_union(&p1->flags, &p2->flags); | |
1021 | } | |
1022 | ||
9e4b50e9 TH |
1023 | static inline bool tomoyo_is_same_domain_initializer_entry |
1024 | (const struct tomoyo_domain_initializer_entry *p1, | |
1025 | const struct tomoyo_domain_initializer_entry *p2) | |
1026 | { | |
1027 | return p1->is_not == p2->is_not && p1->is_last_name == p2->is_last_name | |
1028 | && p1->domainname == p2->domainname | |
1029 | && p1->program == p2->program; | |
1030 | } | |
1031 | ||
1032 | static inline bool tomoyo_is_same_domain_keeper_entry | |
1033 | (const struct tomoyo_domain_keeper_entry *p1, | |
1034 | const struct tomoyo_domain_keeper_entry *p2) | |
1035 | { | |
1036 | return p1->is_not == p2->is_not && p1->is_last_name == p2->is_last_name | |
1037 | && p1->domainname == p2->domainname | |
1038 | && p1->program == p2->program; | |
1039 | } | |
1040 | ||
1041 | static inline bool tomoyo_is_same_alias_entry | |
1042 | (const struct tomoyo_alias_entry *p1, const struct tomoyo_alias_entry *p2) | |
1043 | { | |
1044 | return p1->original_name == p2->original_name && | |
1045 | p1->aliased_name == p2->aliased_name; | |
1046 | } | |
1047 | ||
9590837b KT |
1048 | /** |
1049 | * list_for_each_cookie - iterate over a list with cookie. | |
1050 | * @pos: the &struct list_head to use as a loop cursor. | |
1051 | * @cookie: the &struct list_head to use as a cookie. | |
1052 | * @head: the head for your list. | |
1053 | * | |
fdb8ebb7 | 1054 | * Same with list_for_each_rcu() except that this primitive uses @cookie |
9590837b KT |
1055 | * so that we can continue iteration. |
1056 | * @cookie must be NULL when iteration starts, and @cookie will become | |
1057 | * NULL when iteration finishes. | |
1058 | */ | |
fdb8ebb7 TH |
1059 | #define list_for_each_cookie(pos, cookie, head) \ |
1060 | for (({ if (!cookie) \ | |
1061 | cookie = head; }), \ | |
1062 | pos = rcu_dereference((cookie)->next); \ | |
1063 | prefetch(pos->next), pos != (head) || ((cookie) = NULL); \ | |
1064 | (cookie) = pos, pos = rcu_dereference(pos->next)) | |
1065 | ||
9590837b | 1066 | #endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */ |