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Commit | Line | Data |
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b69a54ee KT |
1 | /* |
2 | * security/tomoyo/file.c | |
3 | * | |
c3ef1500 | 4 | * Pathname restriction functions. |
b69a54ee | 5 | * |
c3ef1500 | 6 | * Copyright (C) 2005-2010 NTT DATA CORPORATION |
b69a54ee KT |
7 | */ |
8 | ||
9 | #include "common.h" | |
5a0e3ad6 | 10 | #include <linux/slab.h> |
b69a54ee | 11 | |
0df7e8b8 TH |
12 | /* |
13 | * Mapping table from "enum tomoyo_path_acl_index" to "enum tomoyo_mac_index". | |
14 | */ | |
57c2590f | 15 | static const u8 tomoyo_p2mac[TOMOYO_MAX_PATH_OPERATION] = { |
57c2590f TH |
16 | [TOMOYO_TYPE_EXECUTE] = TOMOYO_MAC_FILE_EXECUTE, |
17 | [TOMOYO_TYPE_READ] = TOMOYO_MAC_FILE_OPEN, | |
18 | [TOMOYO_TYPE_WRITE] = TOMOYO_MAC_FILE_OPEN, | |
7c75964f | 19 | [TOMOYO_TYPE_APPEND] = TOMOYO_MAC_FILE_OPEN, |
57c2590f | 20 | [TOMOYO_TYPE_UNLINK] = TOMOYO_MAC_FILE_UNLINK, |
7c75964f | 21 | [TOMOYO_TYPE_GETATTR] = TOMOYO_MAC_FILE_GETATTR, |
57c2590f TH |
22 | [TOMOYO_TYPE_RMDIR] = TOMOYO_MAC_FILE_RMDIR, |
23 | [TOMOYO_TYPE_TRUNCATE] = TOMOYO_MAC_FILE_TRUNCATE, | |
24 | [TOMOYO_TYPE_SYMLINK] = TOMOYO_MAC_FILE_SYMLINK, | |
57c2590f TH |
25 | [TOMOYO_TYPE_CHROOT] = TOMOYO_MAC_FILE_CHROOT, |
26 | [TOMOYO_TYPE_UMOUNT] = TOMOYO_MAC_FILE_UMOUNT, | |
27 | }; | |
28 | ||
0df7e8b8 TH |
29 | /* |
30 | * Mapping table from "enum tomoyo_mkdev_acl_index" to "enum tomoyo_mac_index". | |
31 | */ | |
0d2171d7 | 32 | const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION] = { |
57c2590f TH |
33 | [TOMOYO_TYPE_MKBLOCK] = TOMOYO_MAC_FILE_MKBLOCK, |
34 | [TOMOYO_TYPE_MKCHAR] = TOMOYO_MAC_FILE_MKCHAR, | |
35 | }; | |
36 | ||
0df7e8b8 TH |
37 | /* |
38 | * Mapping table from "enum tomoyo_path2_acl_index" to "enum tomoyo_mac_index". | |
39 | */ | |
0d2171d7 | 40 | const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION] = { |
57c2590f TH |
41 | [TOMOYO_TYPE_LINK] = TOMOYO_MAC_FILE_LINK, |
42 | [TOMOYO_TYPE_RENAME] = TOMOYO_MAC_FILE_RENAME, | |
43 | [TOMOYO_TYPE_PIVOT_ROOT] = TOMOYO_MAC_FILE_PIVOT_ROOT, | |
44 | }; | |
45 | ||
0df7e8b8 TH |
46 | /* |
47 | * Mapping table from "enum tomoyo_path_number_acl_index" to | |
48 | * "enum tomoyo_mac_index". | |
49 | */ | |
0d2171d7 | 50 | const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION] = { |
57c2590f TH |
51 | [TOMOYO_TYPE_CREATE] = TOMOYO_MAC_FILE_CREATE, |
52 | [TOMOYO_TYPE_MKDIR] = TOMOYO_MAC_FILE_MKDIR, | |
53 | [TOMOYO_TYPE_MKFIFO] = TOMOYO_MAC_FILE_MKFIFO, | |
54 | [TOMOYO_TYPE_MKSOCK] = TOMOYO_MAC_FILE_MKSOCK, | |
55 | [TOMOYO_TYPE_IOCTL] = TOMOYO_MAC_FILE_IOCTL, | |
56 | [TOMOYO_TYPE_CHMOD] = TOMOYO_MAC_FILE_CHMOD, | |
57 | [TOMOYO_TYPE_CHOWN] = TOMOYO_MAC_FILE_CHOWN, | |
58 | [TOMOYO_TYPE_CHGRP] = TOMOYO_MAC_FILE_CHGRP, | |
59 | }; | |
60 | ||
0df7e8b8 TH |
61 | /** |
62 | * tomoyo_put_name_union - Drop reference on "struct tomoyo_name_union". | |
63 | * | |
64 | * @ptr: Pointer to "struct tomoyo_name_union". | |
65 | * | |
66 | * Returns nothing. | |
67 | */ | |
7762fbff TH |
68 | void tomoyo_put_name_union(struct tomoyo_name_union *ptr) |
69 | { | |
0df7e8b8 TH |
70 | tomoyo_put_group(ptr->group); |
71 | tomoyo_put_name(ptr->filename); | |
7762fbff TH |
72 | } |
73 | ||
0df7e8b8 TH |
74 | /** |
75 | * tomoyo_compare_name_union - Check whether a name matches "struct tomoyo_name_union" or not. | |
76 | * | |
77 | * @name: Pointer to "struct tomoyo_path_info". | |
78 | * @ptr: Pointer to "struct tomoyo_name_union". | |
79 | * | |
80 | * Returns "struct tomoyo_path_info" if @name matches @ptr, NULL otherwise. | |
81 | */ | |
484ca79c TH |
82 | const struct tomoyo_path_info * |
83 | tomoyo_compare_name_union(const struct tomoyo_path_info *name, | |
84 | const struct tomoyo_name_union *ptr) | |
7762fbff | 85 | { |
0df7e8b8 | 86 | if (ptr->group) |
3f629636 | 87 | return tomoyo_path_matches_group(name, ptr->group); |
484ca79c TH |
88 | if (tomoyo_path_matches_pattern(name, ptr->filename)) |
89 | return ptr->filename; | |
90 | return NULL; | |
7762fbff TH |
91 | } |
92 | ||
0df7e8b8 TH |
93 | /** |
94 | * tomoyo_put_number_union - Drop reference on "struct tomoyo_number_union". | |
95 | * | |
96 | * @ptr: Pointer to "struct tomoyo_number_union". | |
97 | * | |
98 | * Returns nothing. | |
99 | */ | |
4c3e9e2d TH |
100 | void tomoyo_put_number_union(struct tomoyo_number_union *ptr) |
101 | { | |
0df7e8b8 | 102 | tomoyo_put_group(ptr->group); |
4c3e9e2d TH |
103 | } |
104 | ||
0df7e8b8 TH |
105 | /** |
106 | * tomoyo_compare_number_union - Check whether a value matches "struct tomoyo_number_union" or not. | |
107 | * | |
108 | * @value: Number to check. | |
109 | * @ptr: Pointer to "struct tomoyo_number_union". | |
110 | * | |
111 | * Returns true if @value matches @ptr, false otherwise. | |
112 | */ | |
4c3e9e2d TH |
113 | bool tomoyo_compare_number_union(const unsigned long value, |
114 | const struct tomoyo_number_union *ptr) | |
115 | { | |
0df7e8b8 | 116 | if (ptr->group) |
4c3e9e2d TH |
117 | return tomoyo_number_matches_group(value, value, ptr->group); |
118 | return value >= ptr->values[0] && value <= ptr->values[1]; | |
119 | } | |
120 | ||
0df7e8b8 TH |
121 | /** |
122 | * tomoyo_add_slash - Add trailing '/' if needed. | |
123 | * | |
124 | * @buf: Pointer to "struct tomoyo_path_info". | |
125 | * | |
126 | * Returns nothing. | |
127 | * | |
128 | * @buf must be generated by tomoyo_encode() because this function does not | |
129 | * allocate memory for adding '/'. | |
130 | */ | |
c8c57e84 TH |
131 | static void tomoyo_add_slash(struct tomoyo_path_info *buf) |
132 | { | |
133 | if (buf->is_dir) | |
134 | return; | |
135 | /* | |
136 | * This is OK because tomoyo_encode() reserves space for appending "/". | |
137 | */ | |
138 | strcat((char *) buf->name, "/"); | |
139 | tomoyo_fill_path_info(buf); | |
140 | } | |
141 | ||
b69a54ee | 142 | /** |
c8c57e84 | 143 | * tomoyo_get_realpath - Get realpath. |
b69a54ee | 144 | * |
c8c57e84 | 145 | * @buf: Pointer to "struct tomoyo_path_info". |
b69a54ee KT |
146 | * @path: Pointer to "struct path". |
147 | * | |
c8c57e84 | 148 | * Returns true on success, false otherwise. |
b69a54ee | 149 | */ |
c8c57e84 | 150 | static bool tomoyo_get_realpath(struct tomoyo_path_info *buf, struct path *path) |
b69a54ee | 151 | { |
c8c57e84 TH |
152 | buf->name = tomoyo_realpath_from_path(path); |
153 | if (buf->name) { | |
154 | tomoyo_fill_path_info(buf); | |
155 | return true; | |
b69a54ee | 156 | } |
c8c57e84 | 157 | return false; |
b69a54ee KT |
158 | } |
159 | ||
99a85259 TH |
160 | /** |
161 | * tomoyo_audit_path_log - Audit path request log. | |
162 | * | |
163 | * @r: Pointer to "struct tomoyo_request_info". | |
164 | * | |
165 | * Returns 0 on success, negative value otherwise. | |
166 | */ | |
167 | static int tomoyo_audit_path_log(struct tomoyo_request_info *r) | |
168 | { | |
eadd99cc TH |
169 | return tomoyo_supervisor(r, "file %s %s\n", tomoyo_path_keyword |
170 | [r->param.path.operation], | |
171 | r->param.path.filename->name); | |
99a85259 TH |
172 | } |
173 | ||
174 | /** | |
175 | * tomoyo_audit_path2_log - Audit path/path request log. | |
176 | * | |
177 | * @r: Pointer to "struct tomoyo_request_info". | |
178 | * | |
179 | * Returns 0 on success, negative value otherwise. | |
180 | */ | |
181 | static int tomoyo_audit_path2_log(struct tomoyo_request_info *r) | |
182 | { | |
2c47ab93 TH |
183 | return tomoyo_supervisor(r, "file %s %s %s\n", tomoyo_mac_keywords |
184 | [tomoyo_pp2mac[r->param.path2.operation]], | |
eadd99cc TH |
185 | r->param.path2.filename1->name, |
186 | r->param.path2.filename2->name); | |
99a85259 TH |
187 | } |
188 | ||
189 | /** | |
190 | * tomoyo_audit_mkdev_log - Audit path/number/number/number request log. | |
191 | * | |
192 | * @r: Pointer to "struct tomoyo_request_info". | |
193 | * | |
194 | * Returns 0 on success, negative value otherwise. | |
195 | */ | |
196 | static int tomoyo_audit_mkdev_log(struct tomoyo_request_info *r) | |
197 | { | |
eadd99cc | 198 | return tomoyo_supervisor(r, "file %s %s 0%o %u %u\n", |
2c47ab93 TH |
199 | tomoyo_mac_keywords |
200 | [tomoyo_pnnn2mac[r->param.mkdev.operation]], | |
eadd99cc TH |
201 | r->param.mkdev.filename->name, |
202 | r->param.mkdev.mode, r->param.mkdev.major, | |
203 | r->param.mkdev.minor); | |
99a85259 TH |
204 | } |
205 | ||
206 | /** | |
207 | * tomoyo_audit_path_number_log - Audit path/number request log. | |
208 | * | |
b5bc60b4 | 209 | * @r: Pointer to "struct tomoyo_request_info". |
99a85259 TH |
210 | * |
211 | * Returns 0 on success, negative value otherwise. | |
212 | */ | |
213 | static int tomoyo_audit_path_number_log(struct tomoyo_request_info *r) | |
214 | { | |
215 | const u8 type = r->param.path_number.operation; | |
216 | u8 radix; | |
99a85259 | 217 | char buffer[64]; |
99a85259 TH |
218 | switch (type) { |
219 | case TOMOYO_TYPE_CREATE: | |
220 | case TOMOYO_TYPE_MKDIR: | |
221 | case TOMOYO_TYPE_MKFIFO: | |
222 | case TOMOYO_TYPE_MKSOCK: | |
223 | case TOMOYO_TYPE_CHMOD: | |
224 | radix = TOMOYO_VALUE_TYPE_OCTAL; | |
225 | break; | |
226 | case TOMOYO_TYPE_IOCTL: | |
227 | radix = TOMOYO_VALUE_TYPE_HEXADECIMAL; | |
228 | break; | |
229 | default: | |
230 | radix = TOMOYO_VALUE_TYPE_DECIMAL; | |
231 | break; | |
232 | } | |
233 | tomoyo_print_ulong(buffer, sizeof(buffer), r->param.path_number.number, | |
234 | radix); | |
2c47ab93 TH |
235 | return tomoyo_supervisor(r, "file %s %s %s\n", tomoyo_mac_keywords |
236 | [tomoyo_pn2mac[type]], | |
eadd99cc | 237 | r->param.path_number.filename->name, buffer); |
b69a54ee KT |
238 | } |
239 | ||
0df7e8b8 TH |
240 | /** |
241 | * tomoyo_check_path_acl - Check permission for path operation. | |
242 | * | |
243 | * @r: Pointer to "struct tomoyo_request_info". | |
244 | * @ptr: Pointer to "struct tomoyo_acl_info". | |
245 | * | |
246 | * Returns true if granted, false otherwise. | |
247 | * | |
248 | * To be able to use wildcard for domain transition, this function sets | |
249 | * matching entry on success. Since the caller holds tomoyo_read_lock(), | |
250 | * it is safe to set matching entry. | |
251 | */ | |
484ca79c | 252 | static bool tomoyo_check_path_acl(struct tomoyo_request_info *r, |
99a85259 | 253 | const struct tomoyo_acl_info *ptr) |
b69a54ee | 254 | { |
99a85259 TH |
255 | const struct tomoyo_path_acl *acl = container_of(ptr, typeof(*acl), |
256 | head); | |
484ca79c TH |
257 | if (acl->perm & (1 << r->param.path.operation)) { |
258 | r->param.path.matched_path = | |
259 | tomoyo_compare_name_union(r->param.path.filename, | |
260 | &acl->name); | |
261 | return r->param.path.matched_path != NULL; | |
262 | } | |
263 | return false; | |
99a85259 | 264 | } |
b69a54ee | 265 | |
0df7e8b8 TH |
266 | /** |
267 | * tomoyo_check_path_number_acl - Check permission for path number operation. | |
268 | * | |
269 | * @r: Pointer to "struct tomoyo_request_info". | |
270 | * @ptr: Pointer to "struct tomoyo_acl_info". | |
271 | * | |
272 | * Returns true if granted, false otherwise. | |
273 | */ | |
484ca79c | 274 | static bool tomoyo_check_path_number_acl(struct tomoyo_request_info *r, |
99a85259 TH |
275 | const struct tomoyo_acl_info *ptr) |
276 | { | |
277 | const struct tomoyo_path_number_acl *acl = | |
278 | container_of(ptr, typeof(*acl), head); | |
279 | return (acl->perm & (1 << r->param.path_number.operation)) && | |
280 | tomoyo_compare_number_union(r->param.path_number.number, | |
281 | &acl->number) && | |
282 | tomoyo_compare_name_union(r->param.path_number.filename, | |
283 | &acl->name); | |
284 | } | |
285 | ||
0df7e8b8 TH |
286 | /** |
287 | * tomoyo_check_path2_acl - Check permission for path path operation. | |
288 | * | |
289 | * @r: Pointer to "struct tomoyo_request_info". | |
290 | * @ptr: Pointer to "struct tomoyo_acl_info". | |
291 | * | |
292 | * Returns true if granted, false otherwise. | |
293 | */ | |
484ca79c | 294 | static bool tomoyo_check_path2_acl(struct tomoyo_request_info *r, |
99a85259 TH |
295 | const struct tomoyo_acl_info *ptr) |
296 | { | |
297 | const struct tomoyo_path2_acl *acl = | |
298 | container_of(ptr, typeof(*acl), head); | |
299 | return (acl->perm & (1 << r->param.path2.operation)) && | |
300 | tomoyo_compare_name_union(r->param.path2.filename1, &acl->name1) | |
301 | && tomoyo_compare_name_union(r->param.path2.filename2, | |
302 | &acl->name2); | |
303 | } | |
304 | ||
0df7e8b8 TH |
305 | /** |
306 | * tomoyo_check_mkdev_acl - Check permission for path number number number operation. | |
307 | * | |
308 | * @r: Pointer to "struct tomoyo_request_info". | |
309 | * @ptr: Pointer to "struct tomoyo_acl_info". | |
310 | * | |
311 | * Returns true if granted, false otherwise. | |
312 | */ | |
484ca79c | 313 | static bool tomoyo_check_mkdev_acl(struct tomoyo_request_info *r, |
0df7e8b8 | 314 | const struct tomoyo_acl_info *ptr) |
99a85259 | 315 | { |
75093152 | 316 | const struct tomoyo_mkdev_acl *acl = |
99a85259 TH |
317 | container_of(ptr, typeof(*acl), head); |
318 | return (acl->perm & (1 << r->param.mkdev.operation)) && | |
319 | tomoyo_compare_number_union(r->param.mkdev.mode, | |
320 | &acl->mode) && | |
321 | tomoyo_compare_number_union(r->param.mkdev.major, | |
322 | &acl->major) && | |
323 | tomoyo_compare_number_union(r->param.mkdev.minor, | |
324 | &acl->minor) && | |
325 | tomoyo_compare_name_union(r->param.mkdev.filename, | |
326 | &acl->name); | |
b69a54ee KT |
327 | } |
328 | ||
0df7e8b8 TH |
329 | /** |
330 | * tomoyo_same_path_acl - Check for duplicated "struct tomoyo_path_acl" entry. | |
331 | * | |
332 | * @a: Pointer to "struct tomoyo_acl_info". | |
333 | * @b: Pointer to "struct tomoyo_acl_info". | |
334 | * | |
335 | * Returns true if @a == @b except permission bits, false otherwise. | |
336 | */ | |
237ab459 TH |
337 | static bool tomoyo_same_path_acl(const struct tomoyo_acl_info *a, |
338 | const struct tomoyo_acl_info *b) | |
339 | { | |
340 | const struct tomoyo_path_acl *p1 = container_of(a, typeof(*p1), head); | |
341 | const struct tomoyo_path_acl *p2 = container_of(b, typeof(*p2), head); | |
0df7e8b8 | 342 | return tomoyo_same_name_union(&p1->name, &p2->name); |
237ab459 TH |
343 | } |
344 | ||
7c75964f TH |
345 | /** |
346 | * tomoyo_merge_path_acl - Merge duplicated "struct tomoyo_path_acl" entry. | |
347 | * | |
348 | * @a: Pointer to "struct tomoyo_acl_info". | |
349 | * @b: Pointer to "struct tomoyo_acl_info". | |
350 | * @is_delete: True for @a &= ~@b, false for @a |= @b. | |
351 | * | |
352 | * Returns true if @a is empty, false otherwise. | |
353 | */ | |
237ab459 TH |
354 | static bool tomoyo_merge_path_acl(struct tomoyo_acl_info *a, |
355 | struct tomoyo_acl_info *b, | |
356 | const bool is_delete) | |
357 | { | |
358 | u16 * const a_perm = &container_of(a, struct tomoyo_path_acl, head) | |
359 | ->perm; | |
360 | u16 perm = *a_perm; | |
361 | const u16 b_perm = container_of(b, struct tomoyo_path_acl, head)->perm; | |
7c75964f | 362 | if (is_delete) |
237ab459 | 363 | perm &= ~b_perm; |
7c75964f | 364 | else |
237ab459 | 365 | perm |= b_perm; |
237ab459 TH |
366 | *a_perm = perm; |
367 | return !perm; | |
368 | } | |
369 | ||
b69a54ee | 370 | /** |
7ef61233 | 371 | * tomoyo_update_path_acl - Update "struct tomoyo_path_acl" list. |
b69a54ee | 372 | * |
a238cf5b TH |
373 | * @perm: Permission. |
374 | * @param: Pointer to "struct tomoyo_acl_param". | |
b69a54ee KT |
375 | * |
376 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
377 | * |
378 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 379 | */ |
a238cf5b TH |
380 | static int tomoyo_update_path_acl(const u16 perm, |
381 | struct tomoyo_acl_param *param) | |
b69a54ee | 382 | { |
9e4b50e9 TH |
383 | struct tomoyo_path_acl e = { |
384 | .head.type = TOMOYO_TYPE_PATH_ACL, | |
a238cf5b | 385 | .perm = perm |
9e4b50e9 | 386 | }; |
237ab459 | 387 | int error; |
a238cf5b TH |
388 | if (!tomoyo_parse_name_union(param, &e.name)) |
389 | error = -EINVAL; | |
390 | else | |
391 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
392 | tomoyo_same_path_acl, | |
393 | tomoyo_merge_path_acl); | |
7762fbff | 394 | tomoyo_put_name_union(&e.name); |
b69a54ee KT |
395 | return error; |
396 | } | |
397 | ||
0df7e8b8 TH |
398 | /** |
399 | * tomoyo_same_mkdev_acl - Check for duplicated "struct tomoyo_mkdev_acl" entry. | |
400 | * | |
401 | * @a: Pointer to "struct tomoyo_acl_info". | |
402 | * @b: Pointer to "struct tomoyo_acl_info". | |
403 | * | |
404 | * Returns true if @a == @b except permission bits, false otherwise. | |
405 | */ | |
75093152 | 406 | static bool tomoyo_same_mkdev_acl(const struct tomoyo_acl_info *a, |
237ab459 TH |
407 | const struct tomoyo_acl_info *b) |
408 | { | |
0df7e8b8 TH |
409 | const struct tomoyo_mkdev_acl *p1 = container_of(a, typeof(*p1), head); |
410 | const struct tomoyo_mkdev_acl *p2 = container_of(b, typeof(*p2), head); | |
411 | return tomoyo_same_name_union(&p1->name, &p2->name) && | |
412 | tomoyo_same_number_union(&p1->mode, &p2->mode) && | |
413 | tomoyo_same_number_union(&p1->major, &p2->major) && | |
414 | tomoyo_same_number_union(&p1->minor, &p2->minor); | |
237ab459 TH |
415 | } |
416 | ||
0df7e8b8 TH |
417 | /** |
418 | * tomoyo_merge_mkdev_acl - Merge duplicated "struct tomoyo_mkdev_acl" entry. | |
419 | * | |
420 | * @a: Pointer to "struct tomoyo_acl_info". | |
421 | * @b: Pointer to "struct tomoyo_acl_info". | |
422 | * @is_delete: True for @a &= ~@b, false for @a |= @b. | |
423 | * | |
424 | * Returns true if @a is empty, false otherwise. | |
425 | */ | |
75093152 | 426 | static bool tomoyo_merge_mkdev_acl(struct tomoyo_acl_info *a, |
0df7e8b8 TH |
427 | struct tomoyo_acl_info *b, |
428 | const bool is_delete) | |
237ab459 | 429 | { |
75093152 | 430 | u8 *const a_perm = &container_of(a, struct tomoyo_mkdev_acl, |
237ab459 TH |
431 | head)->perm; |
432 | u8 perm = *a_perm; | |
75093152 | 433 | const u8 b_perm = container_of(b, struct tomoyo_mkdev_acl, head) |
237ab459 TH |
434 | ->perm; |
435 | if (is_delete) | |
436 | perm &= ~b_perm; | |
437 | else | |
438 | perm |= b_perm; | |
439 | *a_perm = perm; | |
440 | return !perm; | |
441 | } | |
442 | ||
a1f9bb6a | 443 | /** |
75093152 | 444 | * tomoyo_update_mkdev_acl - Update "struct tomoyo_mkdev_acl" list. |
a1f9bb6a | 445 | * |
a238cf5b TH |
446 | * @perm: Permission. |
447 | * @param: Pointer to "struct tomoyo_acl_param". | |
a1f9bb6a TH |
448 | * |
449 | * Returns 0 on success, negative value otherwise. | |
237ab459 TH |
450 | * |
451 | * Caller holds tomoyo_read_lock(). | |
a1f9bb6a | 452 | */ |
a238cf5b TH |
453 | static int tomoyo_update_mkdev_acl(const u8 perm, |
454 | struct tomoyo_acl_param *param) | |
a1f9bb6a | 455 | { |
75093152 TH |
456 | struct tomoyo_mkdev_acl e = { |
457 | .head.type = TOMOYO_TYPE_MKDEV_ACL, | |
a238cf5b | 458 | .perm = perm |
a1f9bb6a | 459 | }; |
a238cf5b TH |
460 | int error; |
461 | if (!tomoyo_parse_name_union(param, &e.name) || | |
462 | !tomoyo_parse_number_union(param, &e.mode) || | |
463 | !tomoyo_parse_number_union(param, &e.major) || | |
464 | !tomoyo_parse_number_union(param, &e.minor)) | |
465 | error = -EINVAL; | |
466 | else | |
467 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
468 | tomoyo_same_mkdev_acl, | |
469 | tomoyo_merge_mkdev_acl); | |
a1f9bb6a TH |
470 | tomoyo_put_name_union(&e.name); |
471 | tomoyo_put_number_union(&e.mode); | |
472 | tomoyo_put_number_union(&e.major); | |
473 | tomoyo_put_number_union(&e.minor); | |
474 | return error; | |
475 | } | |
476 | ||
0df7e8b8 TH |
477 | /** |
478 | * tomoyo_same_path2_acl - Check for duplicated "struct tomoyo_path2_acl" entry. | |
479 | * | |
480 | * @a: Pointer to "struct tomoyo_acl_info". | |
481 | * @b: Pointer to "struct tomoyo_acl_info". | |
482 | * | |
483 | * Returns true if @a == @b except permission bits, false otherwise. | |
484 | */ | |
237ab459 TH |
485 | static bool tomoyo_same_path2_acl(const struct tomoyo_acl_info *a, |
486 | const struct tomoyo_acl_info *b) | |
487 | { | |
488 | const struct tomoyo_path2_acl *p1 = container_of(a, typeof(*p1), head); | |
489 | const struct tomoyo_path2_acl *p2 = container_of(b, typeof(*p2), head); | |
0df7e8b8 TH |
490 | return tomoyo_same_name_union(&p1->name1, &p2->name1) && |
491 | tomoyo_same_name_union(&p1->name2, &p2->name2); | |
237ab459 TH |
492 | } |
493 | ||
0df7e8b8 TH |
494 | /** |
495 | * tomoyo_merge_path2_acl - Merge duplicated "struct tomoyo_path2_acl" entry. | |
496 | * | |
497 | * @a: Pointer to "struct tomoyo_acl_info". | |
498 | * @b: Pointer to "struct tomoyo_acl_info". | |
499 | * @is_delete: True for @a &= ~@b, false for @a |= @b. | |
500 | * | |
501 | * Returns true if @a is empty, false otherwise. | |
502 | */ | |
237ab459 TH |
503 | static bool tomoyo_merge_path2_acl(struct tomoyo_acl_info *a, |
504 | struct tomoyo_acl_info *b, | |
505 | const bool is_delete) | |
506 | { | |
507 | u8 * const a_perm = &container_of(a, struct tomoyo_path2_acl, head) | |
508 | ->perm; | |
509 | u8 perm = *a_perm; | |
510 | const u8 b_perm = container_of(b, struct tomoyo_path2_acl, head)->perm; | |
511 | if (is_delete) | |
512 | perm &= ~b_perm; | |
513 | else | |
514 | perm |= b_perm; | |
515 | *a_perm = perm; | |
516 | return !perm; | |
517 | } | |
518 | ||
b69a54ee | 519 | /** |
7ef61233 | 520 | * tomoyo_update_path2_acl - Update "struct tomoyo_path2_acl" list. |
b69a54ee | 521 | * |
a238cf5b TH |
522 | * @perm: Permission. |
523 | * @param: Pointer to "struct tomoyo_acl_param". | |
b69a54ee KT |
524 | * |
525 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
526 | * |
527 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 528 | */ |
a238cf5b TH |
529 | static int tomoyo_update_path2_acl(const u8 perm, |
530 | struct tomoyo_acl_param *param) | |
b69a54ee | 531 | { |
9e4b50e9 TH |
532 | struct tomoyo_path2_acl e = { |
533 | .head.type = TOMOYO_TYPE_PATH2_ACL, | |
a238cf5b | 534 | .perm = perm |
9e4b50e9 | 535 | }; |
a238cf5b TH |
536 | int error; |
537 | if (!tomoyo_parse_name_union(param, &e.name1) || | |
538 | !tomoyo_parse_name_union(param, &e.name2)) | |
539 | error = -EINVAL; | |
540 | else | |
541 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
542 | tomoyo_same_path2_acl, | |
543 | tomoyo_merge_path2_acl); | |
7762fbff TH |
544 | tomoyo_put_name_union(&e.name1); |
545 | tomoyo_put_name_union(&e.name2); | |
b69a54ee KT |
546 | return error; |
547 | } | |
548 | ||
b69a54ee | 549 | /** |
cb0abe6a | 550 | * tomoyo_path_permission - Check permission for single path operation. |
b69a54ee | 551 | * |
cb0abe6a | 552 | * @r: Pointer to "struct tomoyo_request_info". |
b69a54ee KT |
553 | * @operation: Type of operation. |
554 | * @filename: Filename to check. | |
b69a54ee KT |
555 | * |
556 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
557 | * |
558 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 559 | */ |
05336dee TH |
560 | int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation, |
561 | const struct tomoyo_path_info *filename) | |
b69a54ee | 562 | { |
b69a54ee | 563 | int error; |
b69a54ee | 564 | |
57c2590f | 565 | r->type = tomoyo_p2mac[operation]; |
bd03a3e4 | 566 | r->mode = tomoyo_get_mode(r->domain->ns, r->profile, r->type); |
57c2590f TH |
567 | if (r->mode == TOMOYO_CONFIG_DISABLED) |
568 | return 0; | |
cf6e9a64 TH |
569 | r->param_type = TOMOYO_TYPE_PATH_ACL; |
570 | r->param.path.filename = filename; | |
571 | r->param.path.operation = operation; | |
17fcfbd9 | 572 | do { |
99a85259 | 573 | tomoyo_check_acl(r, tomoyo_check_path_acl); |
99a85259 | 574 | error = tomoyo_audit_path_log(r); |
05336dee TH |
575 | /* |
576 | * Do not retry for execute request, for alias may have | |
577 | * changed. | |
578 | */ | |
579 | } while (error == TOMOYO_RETRY_REQUEST && | |
580 | operation != TOMOYO_TYPE_EXECUTE); | |
b69a54ee KT |
581 | return error; |
582 | } | |
583 | ||
0df7e8b8 TH |
584 | /** |
585 | * tomoyo_same_path_number_acl - Check for duplicated "struct tomoyo_path_number_acl" entry. | |
586 | * | |
587 | * @a: Pointer to "struct tomoyo_acl_info". | |
588 | * @b: Pointer to "struct tomoyo_acl_info". | |
589 | * | |
590 | * Returns true if @a == @b except permission bits, false otherwise. | |
591 | */ | |
237ab459 TH |
592 | static bool tomoyo_same_path_number_acl(const struct tomoyo_acl_info *a, |
593 | const struct tomoyo_acl_info *b) | |
594 | { | |
595 | const struct tomoyo_path_number_acl *p1 = container_of(a, typeof(*p1), | |
596 | head); | |
597 | const struct tomoyo_path_number_acl *p2 = container_of(b, typeof(*p2), | |
598 | head); | |
0df7e8b8 TH |
599 | return tomoyo_same_name_union(&p1->name, &p2->name) && |
600 | tomoyo_same_number_union(&p1->number, &p2->number); | |
237ab459 TH |
601 | } |
602 | ||
0df7e8b8 TH |
603 | /** |
604 | * tomoyo_merge_path_number_acl - Merge duplicated "struct tomoyo_path_number_acl" entry. | |
605 | * | |
606 | * @a: Pointer to "struct tomoyo_acl_info". | |
607 | * @b: Pointer to "struct tomoyo_acl_info". | |
608 | * @is_delete: True for @a &= ~@b, false for @a |= @b. | |
609 | * | |
610 | * Returns true if @a is empty, false otherwise. | |
611 | */ | |
237ab459 TH |
612 | static bool tomoyo_merge_path_number_acl(struct tomoyo_acl_info *a, |
613 | struct tomoyo_acl_info *b, | |
614 | const bool is_delete) | |
615 | { | |
616 | u8 * const a_perm = &container_of(a, struct tomoyo_path_number_acl, | |
617 | head)->perm; | |
618 | u8 perm = *a_perm; | |
619 | const u8 b_perm = container_of(b, struct tomoyo_path_number_acl, head) | |
620 | ->perm; | |
621 | if (is_delete) | |
622 | perm &= ~b_perm; | |
623 | else | |
624 | perm |= b_perm; | |
625 | *a_perm = perm; | |
626 | return !perm; | |
627 | } | |
628 | ||
a1f9bb6a TH |
629 | /** |
630 | * tomoyo_update_path_number_acl - Update ioctl/chmod/chown/chgrp ACL. | |
631 | * | |
a238cf5b TH |
632 | * @perm: Permission. |
633 | * @param: Pointer to "struct tomoyo_acl_param". | |
a1f9bb6a TH |
634 | * |
635 | * Returns 0 on success, negative value otherwise. | |
636 | */ | |
a238cf5b TH |
637 | static int tomoyo_update_path_number_acl(const u8 perm, |
638 | struct tomoyo_acl_param *param) | |
a1f9bb6a | 639 | { |
a1f9bb6a TH |
640 | struct tomoyo_path_number_acl e = { |
641 | .head.type = TOMOYO_TYPE_PATH_NUMBER_ACL, | |
a238cf5b | 642 | .perm = perm |
a1f9bb6a | 643 | }; |
a238cf5b TH |
644 | int error; |
645 | if (!tomoyo_parse_name_union(param, &e.name) || | |
646 | !tomoyo_parse_number_union(param, &e.number)) | |
647 | error = -EINVAL; | |
648 | else | |
649 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
650 | tomoyo_same_path_number_acl, | |
651 | tomoyo_merge_path_number_acl); | |
a1f9bb6a TH |
652 | tomoyo_put_name_union(&e.name); |
653 | tomoyo_put_number_union(&e.number); | |
654 | return error; | |
655 | } | |
656 | ||
a1f9bb6a TH |
657 | /** |
658 | * tomoyo_path_number_perm - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp". | |
659 | * | |
660 | * @type: Type of operation. | |
661 | * @path: Pointer to "struct path". | |
662 | * @number: Number. | |
663 | * | |
664 | * Returns 0 on success, negative value otherwise. | |
665 | */ | |
666 | int tomoyo_path_number_perm(const u8 type, struct path *path, | |
667 | unsigned long number) | |
668 | { | |
669 | struct tomoyo_request_info r; | |
97fb35e4 TH |
670 | struct tomoyo_obj_info obj = { |
671 | .path1 = *path, | |
672 | }; | |
a1f9bb6a | 673 | int error = -ENOMEM; |
c8c57e84 | 674 | struct tomoyo_path_info buf; |
a1f9bb6a TH |
675 | int idx; |
676 | ||
57c2590f | 677 | if (tomoyo_init_request_info(&r, NULL, tomoyo_pn2mac[type]) |
5625f2e3 | 678 | == TOMOYO_CONFIG_DISABLED || !path->dentry) |
a1f9bb6a TH |
679 | return 0; |
680 | idx = tomoyo_read_lock(); | |
c8c57e84 | 681 | if (!tomoyo_get_realpath(&buf, path)) |
a1f9bb6a | 682 | goto out; |
97fb35e4 | 683 | r.obj = &obj; |
c8c57e84 TH |
684 | if (type == TOMOYO_TYPE_MKDIR) |
685 | tomoyo_add_slash(&buf); | |
cb917cf5 TH |
686 | r.param_type = TOMOYO_TYPE_PATH_NUMBER_ACL; |
687 | r.param.path_number.operation = type; | |
688 | r.param.path_number.filename = &buf; | |
689 | r.param.path_number.number = number; | |
690 | do { | |
691 | tomoyo_check_acl(&r, tomoyo_check_path_number_acl); | |
692 | error = tomoyo_audit_path_number_log(&r); | |
693 | } while (error == TOMOYO_RETRY_REQUEST); | |
c8c57e84 | 694 | kfree(buf.name); |
cb917cf5 | 695 | out: |
a1f9bb6a TH |
696 | tomoyo_read_unlock(idx); |
697 | if (r.mode != TOMOYO_CONFIG_ENFORCING) | |
698 | error = 0; | |
699 | return error; | |
700 | } | |
701 | ||
b69a54ee KT |
702 | /** |
703 | * tomoyo_check_open_permission - Check permission for "read" and "write". | |
704 | * | |
705 | * @domain: Pointer to "struct tomoyo_domain_info". | |
706 | * @path: Pointer to "struct path". | |
707 | * @flag: Flags for open(). | |
708 | * | |
709 | * Returns 0 on success, negative value otherwise. | |
710 | */ | |
711 | int tomoyo_check_open_permission(struct tomoyo_domain_info *domain, | |
712 | struct path *path, const int flag) | |
713 | { | |
714 | const u8 acc_mode = ACC_MODE(flag); | |
eae61f3c | 715 | int error = 0; |
c8c57e84 | 716 | struct tomoyo_path_info buf; |
cb0abe6a | 717 | struct tomoyo_request_info r; |
97fb35e4 TH |
718 | struct tomoyo_obj_info obj = { |
719 | .path1 = *path, | |
720 | }; | |
fdb8ebb7 | 721 | int idx; |
b69a54ee | 722 | |
57c2590f TH |
723 | buf.name = NULL; |
724 | r.mode = TOMOYO_CONFIG_DISABLED; | |
fdb8ebb7 | 725 | idx = tomoyo_read_lock(); |
7c75964f TH |
726 | if (acc_mode && |
727 | tomoyo_init_request_info(&r, domain, TOMOYO_MAC_FILE_OPEN) | |
57c2590f TH |
728 | != TOMOYO_CONFIG_DISABLED) { |
729 | if (!tomoyo_get_realpath(&buf, path)) { | |
730 | error = -ENOMEM; | |
731 | goto out; | |
732 | } | |
97fb35e4 | 733 | r.obj = &obj; |
7c75964f TH |
734 | if (acc_mode & MAY_READ) |
735 | error = tomoyo_path_permission(&r, TOMOYO_TYPE_READ, | |
736 | &buf); | |
737 | if (!error && (acc_mode & MAY_WRITE)) | |
738 | error = tomoyo_path_permission(&r, (flag & O_APPEND) ? | |
739 | TOMOYO_TYPE_APPEND : | |
740 | TOMOYO_TYPE_WRITE, | |
57c2590f | 741 | &buf); |
57c2590f | 742 | } |
b69a54ee | 743 | out: |
c8c57e84 | 744 | kfree(buf.name); |
fdb8ebb7 | 745 | tomoyo_read_unlock(idx); |
cb0abe6a | 746 | if (r.mode != TOMOYO_CONFIG_ENFORCING) |
b69a54ee KT |
747 | error = 0; |
748 | return error; | |
749 | } | |
750 | ||
751 | /** | |
7c75964f | 752 | * tomoyo_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "append", "chroot" and "unmount". |
b69a54ee | 753 | * |
b69a54ee KT |
754 | * @operation: Type of operation. |
755 | * @path: Pointer to "struct path". | |
97fb35e4 TH |
756 | * @target: Symlink's target if @operation is TOMOYO_TYPE_SYMLINK, |
757 | * NULL otherwise. | |
b69a54ee KT |
758 | * |
759 | * Returns 0 on success, negative value otherwise. | |
760 | */ | |
97fb35e4 | 761 | int tomoyo_path_perm(const u8 operation, struct path *path, const char *target) |
b69a54ee | 762 | { |
cb0abe6a | 763 | struct tomoyo_request_info r; |
97fb35e4 TH |
764 | struct tomoyo_obj_info obj = { |
765 | .path1 = *path, | |
766 | }; | |
7c75964f TH |
767 | int error; |
768 | struct tomoyo_path_info buf; | |
769 | bool is_enforce; | |
97fb35e4 | 770 | struct tomoyo_path_info symlink_target; |
fdb8ebb7 | 771 | int idx; |
b69a54ee | 772 | |
57c2590f TH |
773 | if (tomoyo_init_request_info(&r, NULL, tomoyo_p2mac[operation]) |
774 | == TOMOYO_CONFIG_DISABLED) | |
b69a54ee | 775 | return 0; |
7c75964f TH |
776 | is_enforce = (r.mode == TOMOYO_CONFIG_ENFORCING); |
777 | error = -ENOMEM; | |
57c2590f | 778 | buf.name = NULL; |
fdb8ebb7 | 779 | idx = tomoyo_read_lock(); |
c8c57e84 | 780 | if (!tomoyo_get_realpath(&buf, path)) |
b69a54ee | 781 | goto out; |
97fb35e4 | 782 | r.obj = &obj; |
b69a54ee | 783 | switch (operation) { |
7ef61233 TH |
784 | case TOMOYO_TYPE_RMDIR: |
785 | case TOMOYO_TYPE_CHROOT: | |
c8c57e84 TH |
786 | tomoyo_add_slash(&buf); |
787 | break; | |
97fb35e4 TH |
788 | case TOMOYO_TYPE_SYMLINK: |
789 | symlink_target.name = tomoyo_encode(target); | |
790 | if (!symlink_target.name) | |
791 | goto out; | |
792 | tomoyo_fill_path_info(&symlink_target); | |
793 | obj.symlink_target = &symlink_target; | |
794 | break; | |
b69a54ee | 795 | } |
c8c57e84 | 796 | error = tomoyo_path_permission(&r, operation, &buf); |
97fb35e4 TH |
797 | if (operation == TOMOYO_TYPE_SYMLINK) |
798 | kfree(symlink_target.name); | |
b69a54ee | 799 | out: |
c8c57e84 | 800 | kfree(buf.name); |
fdb8ebb7 | 801 | tomoyo_read_unlock(idx); |
7c75964f | 802 | if (!is_enforce) |
b69a54ee KT |
803 | error = 0; |
804 | return error; | |
805 | } | |
806 | ||
a1f9bb6a | 807 | /** |
75093152 | 808 | * tomoyo_mkdev_perm - Check permission for "mkblock" and "mkchar". |
a1f9bb6a TH |
809 | * |
810 | * @operation: Type of operation. (TOMOYO_TYPE_MKCHAR or TOMOYO_TYPE_MKBLOCK) | |
811 | * @path: Pointer to "struct path". | |
812 | * @mode: Create mode. | |
813 | * @dev: Device number. | |
814 | * | |
815 | * Returns 0 on success, negative value otherwise. | |
816 | */ | |
75093152 | 817 | int tomoyo_mkdev_perm(const u8 operation, struct path *path, |
0df7e8b8 | 818 | const unsigned int mode, unsigned int dev) |
a1f9bb6a TH |
819 | { |
820 | struct tomoyo_request_info r; | |
97fb35e4 TH |
821 | struct tomoyo_obj_info obj = { |
822 | .path1 = *path, | |
823 | }; | |
a1f9bb6a | 824 | int error = -ENOMEM; |
c8c57e84 | 825 | struct tomoyo_path_info buf; |
a1f9bb6a TH |
826 | int idx; |
827 | ||
5625f2e3 | 828 | if (tomoyo_init_request_info(&r, NULL, tomoyo_pnnn2mac[operation]) |
57c2590f | 829 | == TOMOYO_CONFIG_DISABLED) |
a1f9bb6a TH |
830 | return 0; |
831 | idx = tomoyo_read_lock(); | |
832 | error = -ENOMEM; | |
c8c57e84 | 833 | if (tomoyo_get_realpath(&buf, path)) { |
97fb35e4 | 834 | r.obj = &obj; |
cf6e9a64 | 835 | dev = new_decode_dev(dev); |
75093152 | 836 | r.param_type = TOMOYO_TYPE_MKDEV_ACL; |
cf6e9a64 TH |
837 | r.param.mkdev.filename = &buf; |
838 | r.param.mkdev.operation = operation; | |
839 | r.param.mkdev.mode = mode; | |
840 | r.param.mkdev.major = MAJOR(dev); | |
841 | r.param.mkdev.minor = MINOR(dev); | |
99a85259 TH |
842 | tomoyo_check_acl(&r, tomoyo_check_mkdev_acl); |
843 | error = tomoyo_audit_mkdev_log(&r); | |
c8c57e84 | 844 | kfree(buf.name); |
a1f9bb6a TH |
845 | } |
846 | tomoyo_read_unlock(idx); | |
847 | if (r.mode != TOMOYO_CONFIG_ENFORCING) | |
848 | error = 0; | |
849 | return error; | |
850 | } | |
851 | ||
b69a54ee | 852 | /** |
7ef61233 | 853 | * tomoyo_path2_perm - Check permission for "rename", "link" and "pivot_root". |
b69a54ee | 854 | * |
b69a54ee KT |
855 | * @operation: Type of operation. |
856 | * @path1: Pointer to "struct path". | |
857 | * @path2: Pointer to "struct path". | |
858 | * | |
859 | * Returns 0 on success, negative value otherwise. | |
860 | */ | |
97d6931e | 861 | int tomoyo_path2_perm(const u8 operation, struct path *path1, |
7ef61233 | 862 | struct path *path2) |
b69a54ee KT |
863 | { |
864 | int error = -ENOMEM; | |
c8c57e84 TH |
865 | struct tomoyo_path_info buf1; |
866 | struct tomoyo_path_info buf2; | |
cb0abe6a | 867 | struct tomoyo_request_info r; |
97fb35e4 TH |
868 | struct tomoyo_obj_info obj = { |
869 | .path1 = *path1, | |
870 | .path2 = *path2, | |
871 | }; | |
fdb8ebb7 | 872 | int idx; |
b69a54ee | 873 | |
5625f2e3 | 874 | if (tomoyo_init_request_info(&r, NULL, tomoyo_pp2mac[operation]) |
57c2590f | 875 | == TOMOYO_CONFIG_DISABLED) |
b69a54ee | 876 | return 0; |
c8c57e84 TH |
877 | buf1.name = NULL; |
878 | buf2.name = NULL; | |
fdb8ebb7 | 879 | idx = tomoyo_read_lock(); |
c8c57e84 TH |
880 | if (!tomoyo_get_realpath(&buf1, path1) || |
881 | !tomoyo_get_realpath(&buf2, path2)) | |
b69a54ee | 882 | goto out; |
57c2590f TH |
883 | switch (operation) { |
884 | struct dentry *dentry; | |
885 | case TOMOYO_TYPE_RENAME: | |
886 | case TOMOYO_TYPE_LINK: | |
887 | dentry = path1->dentry; | |
888 | if (!dentry->d_inode || !S_ISDIR(dentry->d_inode->i_mode)) | |
889 | break; | |
890 | /* fall through */ | |
891 | case TOMOYO_TYPE_PIVOT_ROOT: | |
892 | tomoyo_add_slash(&buf1); | |
893 | tomoyo_add_slash(&buf2); | |
894 | break; | |
895 | } | |
97fb35e4 | 896 | r.obj = &obj; |
cf6e9a64 TH |
897 | r.param_type = TOMOYO_TYPE_PATH2_ACL; |
898 | r.param.path2.operation = operation; | |
899 | r.param.path2.filename1 = &buf1; | |
900 | r.param.path2.filename2 = &buf2; | |
17fcfbd9 | 901 | do { |
99a85259 TH |
902 | tomoyo_check_acl(&r, tomoyo_check_path2_acl); |
903 | error = tomoyo_audit_path2_log(&r); | |
904 | } while (error == TOMOYO_RETRY_REQUEST); | |
b69a54ee | 905 | out: |
c8c57e84 TH |
906 | kfree(buf1.name); |
907 | kfree(buf2.name); | |
fdb8ebb7 | 908 | tomoyo_read_unlock(idx); |
cb0abe6a | 909 | if (r.mode != TOMOYO_CONFIG_ENFORCING) |
b69a54ee KT |
910 | error = 0; |
911 | return error; | |
912 | } | |
a1f9bb6a | 913 | |
a238cf5b TH |
914 | /** |
915 | * tomoyo_same_mount_acl - Check for duplicated "struct tomoyo_mount_acl" entry. | |
916 | * | |
917 | * @a: Pointer to "struct tomoyo_acl_info". | |
918 | * @b: Pointer to "struct tomoyo_acl_info". | |
919 | * | |
920 | * Returns true if @a == @b, false otherwise. | |
921 | */ | |
922 | static bool tomoyo_same_mount_acl(const struct tomoyo_acl_info *a, | |
923 | const struct tomoyo_acl_info *b) | |
924 | { | |
925 | const struct tomoyo_mount_acl *p1 = container_of(a, typeof(*p1), head); | |
926 | const struct tomoyo_mount_acl *p2 = container_of(b, typeof(*p2), head); | |
927 | return tomoyo_same_name_union(&p1->dev_name, &p2->dev_name) && | |
928 | tomoyo_same_name_union(&p1->dir_name, &p2->dir_name) && | |
929 | tomoyo_same_name_union(&p1->fs_type, &p2->fs_type) && | |
930 | tomoyo_same_number_union(&p1->flags, &p2->flags); | |
931 | } | |
932 | ||
933 | /** | |
934 | * tomoyo_update_mount_acl - Write "struct tomoyo_mount_acl" list. | |
935 | * | |
936 | * @param: Pointer to "struct tomoyo_acl_param". | |
937 | * | |
938 | * Returns 0 on success, negative value otherwise. | |
939 | * | |
940 | * Caller holds tomoyo_read_lock(). | |
941 | */ | |
942 | static int tomoyo_update_mount_acl(struct tomoyo_acl_param *param) | |
943 | { | |
944 | struct tomoyo_mount_acl e = { .head.type = TOMOYO_TYPE_MOUNT_ACL }; | |
945 | int error; | |
946 | if (!tomoyo_parse_name_union(param, &e.dev_name) || | |
947 | !tomoyo_parse_name_union(param, &e.dir_name) || | |
948 | !tomoyo_parse_name_union(param, &e.fs_type) || | |
949 | !tomoyo_parse_number_union(param, &e.flags)) | |
950 | error = -EINVAL; | |
951 | else | |
952 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
953 | tomoyo_same_mount_acl, NULL); | |
954 | tomoyo_put_name_union(&e.dev_name); | |
955 | tomoyo_put_name_union(&e.dir_name); | |
956 | tomoyo_put_name_union(&e.fs_type); | |
957 | tomoyo_put_number_union(&e.flags); | |
958 | return error; | |
959 | } | |
960 | ||
a1f9bb6a | 961 | /** |
e2bf6907 | 962 | * tomoyo_write_file - Update file related list. |
a1f9bb6a | 963 | * |
a238cf5b | 964 | * @param: Pointer to "struct tomoyo_acl_param". |
a1f9bb6a TH |
965 | * |
966 | * Returns 0 on success, negative value otherwise. | |
967 | * | |
968 | * Caller holds tomoyo_read_lock(). | |
969 | */ | |
a238cf5b | 970 | int tomoyo_write_file(struct tomoyo_acl_param *param) |
a1f9bb6a | 971 | { |
a238cf5b | 972 | u16 perm = 0; |
a1f9bb6a | 973 | u8 type; |
a238cf5b TH |
974 | const char *operation = tomoyo_read_token(param); |
975 | for (type = 0; type < TOMOYO_MAX_PATH_OPERATION; type++) | |
976 | if (tomoyo_permstr(operation, tomoyo_path_keyword[type])) | |
977 | perm |= 1 << type; | |
978 | if (perm) | |
979 | return tomoyo_update_path_acl(perm, param); | |
980 | for (type = 0; type < TOMOYO_MAX_PATH2_OPERATION; type++) | |
2c47ab93 TH |
981 | if (tomoyo_permstr(operation, |
982 | tomoyo_mac_keywords[tomoyo_pp2mac[type]])) | |
a238cf5b TH |
983 | perm |= 1 << type; |
984 | if (perm) | |
985 | return tomoyo_update_path2_acl(perm, param); | |
986 | for (type = 0; type < TOMOYO_MAX_PATH_NUMBER_OPERATION; type++) | |
987 | if (tomoyo_permstr(operation, | |
2c47ab93 | 988 | tomoyo_mac_keywords[tomoyo_pn2mac[type]])) |
a238cf5b TH |
989 | perm |= 1 << type; |
990 | if (perm) | |
991 | return tomoyo_update_path_number_acl(perm, param); | |
992 | for (type = 0; type < TOMOYO_MAX_MKDEV_OPERATION; type++) | |
2c47ab93 TH |
993 | if (tomoyo_permstr(operation, |
994 | tomoyo_mac_keywords[tomoyo_pnnn2mac[type]])) | |
a238cf5b TH |
995 | perm |= 1 << type; |
996 | if (perm) | |
997 | return tomoyo_update_mkdev_acl(perm, param); | |
2c47ab93 TH |
998 | if (tomoyo_permstr(operation, |
999 | tomoyo_mac_keywords[TOMOYO_MAC_FILE_MOUNT])) | |
a238cf5b | 1000 | return tomoyo_update_mount_acl(param); |
a1f9bb6a TH |
1001 | return -EINVAL; |
1002 | } |