Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
b69a54ee KT |
2 | /* |
3 | * security/tomoyo/file.c | |
4 | * | |
0f2a55d5 | 5 | * Copyright (C) 2005-2011 NTT DATA CORPORATION |
b69a54ee KT |
6 | */ |
7 | ||
8 | #include "common.h" | |
5a0e3ad6 | 9 | #include <linux/slab.h> |
b69a54ee | 10 | |
0df7e8b8 TH |
11 | /* |
12 | * Mapping table from "enum tomoyo_path_acl_index" to "enum tomoyo_mac_index". | |
13 | */ | |
57c2590f | 14 | static const u8 tomoyo_p2mac[TOMOYO_MAX_PATH_OPERATION] = { |
57c2590f TH |
15 | [TOMOYO_TYPE_EXECUTE] = TOMOYO_MAC_FILE_EXECUTE, |
16 | [TOMOYO_TYPE_READ] = TOMOYO_MAC_FILE_OPEN, | |
17 | [TOMOYO_TYPE_WRITE] = TOMOYO_MAC_FILE_OPEN, | |
7c75964f | 18 | [TOMOYO_TYPE_APPEND] = TOMOYO_MAC_FILE_OPEN, |
57c2590f | 19 | [TOMOYO_TYPE_UNLINK] = TOMOYO_MAC_FILE_UNLINK, |
7c75964f | 20 | [TOMOYO_TYPE_GETATTR] = TOMOYO_MAC_FILE_GETATTR, |
57c2590f TH |
21 | [TOMOYO_TYPE_RMDIR] = TOMOYO_MAC_FILE_RMDIR, |
22 | [TOMOYO_TYPE_TRUNCATE] = TOMOYO_MAC_FILE_TRUNCATE, | |
23 | [TOMOYO_TYPE_SYMLINK] = TOMOYO_MAC_FILE_SYMLINK, | |
57c2590f TH |
24 | [TOMOYO_TYPE_CHROOT] = TOMOYO_MAC_FILE_CHROOT, |
25 | [TOMOYO_TYPE_UMOUNT] = TOMOYO_MAC_FILE_UMOUNT, | |
26 | }; | |
27 | ||
0df7e8b8 TH |
28 | /* |
29 | * Mapping table from "enum tomoyo_mkdev_acl_index" to "enum tomoyo_mac_index". | |
30 | */ | |
0d2171d7 | 31 | const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION] = { |
57c2590f TH |
32 | [TOMOYO_TYPE_MKBLOCK] = TOMOYO_MAC_FILE_MKBLOCK, |
33 | [TOMOYO_TYPE_MKCHAR] = TOMOYO_MAC_FILE_MKCHAR, | |
34 | }; | |
35 | ||
0df7e8b8 TH |
36 | /* |
37 | * Mapping table from "enum tomoyo_path2_acl_index" to "enum tomoyo_mac_index". | |
38 | */ | |
0d2171d7 | 39 | const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION] = { |
57c2590f TH |
40 | [TOMOYO_TYPE_LINK] = TOMOYO_MAC_FILE_LINK, |
41 | [TOMOYO_TYPE_RENAME] = TOMOYO_MAC_FILE_RENAME, | |
42 | [TOMOYO_TYPE_PIVOT_ROOT] = TOMOYO_MAC_FILE_PIVOT_ROOT, | |
43 | }; | |
44 | ||
0df7e8b8 TH |
45 | /* |
46 | * Mapping table from "enum tomoyo_path_number_acl_index" to | |
47 | * "enum tomoyo_mac_index". | |
48 | */ | |
0d2171d7 | 49 | const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION] = { |
57c2590f TH |
50 | [TOMOYO_TYPE_CREATE] = TOMOYO_MAC_FILE_CREATE, |
51 | [TOMOYO_TYPE_MKDIR] = TOMOYO_MAC_FILE_MKDIR, | |
52 | [TOMOYO_TYPE_MKFIFO] = TOMOYO_MAC_FILE_MKFIFO, | |
53 | [TOMOYO_TYPE_MKSOCK] = TOMOYO_MAC_FILE_MKSOCK, | |
54 | [TOMOYO_TYPE_IOCTL] = TOMOYO_MAC_FILE_IOCTL, | |
55 | [TOMOYO_TYPE_CHMOD] = TOMOYO_MAC_FILE_CHMOD, | |
56 | [TOMOYO_TYPE_CHOWN] = TOMOYO_MAC_FILE_CHOWN, | |
57 | [TOMOYO_TYPE_CHGRP] = TOMOYO_MAC_FILE_CHGRP, | |
58 | }; | |
59 | ||
0df7e8b8 TH |
60 | /** |
61 | * tomoyo_put_name_union - Drop reference on "struct tomoyo_name_union". | |
62 | * | |
63 | * @ptr: Pointer to "struct tomoyo_name_union". | |
64 | * | |
65 | * Returns nothing. | |
66 | */ | |
7762fbff TH |
67 | void tomoyo_put_name_union(struct tomoyo_name_union *ptr) |
68 | { | |
0df7e8b8 TH |
69 | tomoyo_put_group(ptr->group); |
70 | tomoyo_put_name(ptr->filename); | |
7762fbff TH |
71 | } |
72 | ||
0df7e8b8 TH |
73 | /** |
74 | * tomoyo_compare_name_union - Check whether a name matches "struct tomoyo_name_union" or not. | |
75 | * | |
76 | * @name: Pointer to "struct tomoyo_path_info". | |
77 | * @ptr: Pointer to "struct tomoyo_name_union". | |
78 | * | |
79 | * Returns "struct tomoyo_path_info" if @name matches @ptr, NULL otherwise. | |
80 | */ | |
484ca79c TH |
81 | const struct tomoyo_path_info * |
82 | tomoyo_compare_name_union(const struct tomoyo_path_info *name, | |
83 | const struct tomoyo_name_union *ptr) | |
7762fbff | 84 | { |
0df7e8b8 | 85 | if (ptr->group) |
3f629636 | 86 | return tomoyo_path_matches_group(name, ptr->group); |
484ca79c TH |
87 | if (tomoyo_path_matches_pattern(name, ptr->filename)) |
88 | return ptr->filename; | |
89 | return NULL; | |
7762fbff TH |
90 | } |
91 | ||
0df7e8b8 TH |
92 | /** |
93 | * tomoyo_put_number_union - Drop reference on "struct tomoyo_number_union". | |
94 | * | |
95 | * @ptr: Pointer to "struct tomoyo_number_union". | |
96 | * | |
97 | * Returns nothing. | |
98 | */ | |
4c3e9e2d TH |
99 | void tomoyo_put_number_union(struct tomoyo_number_union *ptr) |
100 | { | |
0df7e8b8 | 101 | tomoyo_put_group(ptr->group); |
4c3e9e2d TH |
102 | } |
103 | ||
0df7e8b8 TH |
104 | /** |
105 | * tomoyo_compare_number_union - Check whether a value matches "struct tomoyo_number_union" or not. | |
106 | * | |
107 | * @value: Number to check. | |
108 | * @ptr: Pointer to "struct tomoyo_number_union". | |
109 | * | |
110 | * Returns true if @value matches @ptr, false otherwise. | |
111 | */ | |
4c3e9e2d TH |
112 | bool tomoyo_compare_number_union(const unsigned long value, |
113 | const struct tomoyo_number_union *ptr) | |
114 | { | |
0df7e8b8 | 115 | if (ptr->group) |
4c3e9e2d TH |
116 | return tomoyo_number_matches_group(value, value, ptr->group); |
117 | return value >= ptr->values[0] && value <= ptr->values[1]; | |
118 | } | |
119 | ||
0df7e8b8 TH |
120 | /** |
121 | * tomoyo_add_slash - Add trailing '/' if needed. | |
122 | * | |
123 | * @buf: Pointer to "struct tomoyo_path_info". | |
124 | * | |
125 | * Returns nothing. | |
126 | * | |
127 | * @buf must be generated by tomoyo_encode() because this function does not | |
128 | * allocate memory for adding '/'. | |
129 | */ | |
c8c57e84 TH |
130 | static void tomoyo_add_slash(struct tomoyo_path_info *buf) |
131 | { | |
132 | if (buf->is_dir) | |
133 | return; | |
134 | /* | |
135 | * This is OK because tomoyo_encode() reserves space for appending "/". | |
136 | */ | |
137 | strcat((char *) buf->name, "/"); | |
138 | tomoyo_fill_path_info(buf); | |
139 | } | |
140 | ||
b69a54ee | 141 | /** |
c8c57e84 | 142 | * tomoyo_get_realpath - Get realpath. |
b69a54ee | 143 | * |
c8c57e84 | 144 | * @buf: Pointer to "struct tomoyo_path_info". |
b69a54ee KT |
145 | * @path: Pointer to "struct path". |
146 | * | |
c8c57e84 | 147 | * Returns true on success, false otherwise. |
b69a54ee | 148 | */ |
3f7036a0 | 149 | static bool tomoyo_get_realpath(struct tomoyo_path_info *buf, const struct path *path) |
b69a54ee | 150 | { |
c8c57e84 TH |
151 | buf->name = tomoyo_realpath_from_path(path); |
152 | if (buf->name) { | |
153 | tomoyo_fill_path_info(buf); | |
154 | return true; | |
b69a54ee | 155 | } |
0f2a55d5 | 156 | return false; |
b69a54ee KT |
157 | } |
158 | ||
99a85259 TH |
159 | /** |
160 | * tomoyo_audit_path_log - Audit path request log. | |
161 | * | |
162 | * @r: Pointer to "struct tomoyo_request_info". | |
163 | * | |
164 | * Returns 0 on success, negative value otherwise. | |
165 | */ | |
166 | static int tomoyo_audit_path_log(struct tomoyo_request_info *r) | |
167 | { | |
eadd99cc TH |
168 | return tomoyo_supervisor(r, "file %s %s\n", tomoyo_path_keyword |
169 | [r->param.path.operation], | |
170 | r->param.path.filename->name); | |
99a85259 TH |
171 | } |
172 | ||
173 | /** | |
174 | * tomoyo_audit_path2_log - Audit path/path request log. | |
175 | * | |
176 | * @r: Pointer to "struct tomoyo_request_info". | |
177 | * | |
178 | * Returns 0 on success, negative value otherwise. | |
179 | */ | |
180 | static int tomoyo_audit_path2_log(struct tomoyo_request_info *r) | |
181 | { | |
2c47ab93 TH |
182 | return tomoyo_supervisor(r, "file %s %s %s\n", tomoyo_mac_keywords |
183 | [tomoyo_pp2mac[r->param.path2.operation]], | |
eadd99cc TH |
184 | r->param.path2.filename1->name, |
185 | r->param.path2.filename2->name); | |
99a85259 TH |
186 | } |
187 | ||
188 | /** | |
189 | * tomoyo_audit_mkdev_log - Audit path/number/number/number request log. | |
190 | * | |
191 | * @r: Pointer to "struct tomoyo_request_info". | |
192 | * | |
193 | * Returns 0 on success, negative value otherwise. | |
194 | */ | |
195 | static int tomoyo_audit_mkdev_log(struct tomoyo_request_info *r) | |
196 | { | |
eadd99cc | 197 | return tomoyo_supervisor(r, "file %s %s 0%o %u %u\n", |
2c47ab93 TH |
198 | tomoyo_mac_keywords |
199 | [tomoyo_pnnn2mac[r->param.mkdev.operation]], | |
eadd99cc TH |
200 | r->param.mkdev.filename->name, |
201 | r->param.mkdev.mode, r->param.mkdev.major, | |
202 | r->param.mkdev.minor); | |
99a85259 TH |
203 | } |
204 | ||
205 | /** | |
206 | * tomoyo_audit_path_number_log - Audit path/number request log. | |
207 | * | |
b5bc60b4 | 208 | * @r: Pointer to "struct tomoyo_request_info". |
99a85259 TH |
209 | * |
210 | * Returns 0 on success, negative value otherwise. | |
211 | */ | |
212 | static int tomoyo_audit_path_number_log(struct tomoyo_request_info *r) | |
213 | { | |
214 | const u8 type = r->param.path_number.operation; | |
215 | u8 radix; | |
99a85259 | 216 | char buffer[64]; |
cdcf6723 | 217 | |
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); | |
cdcf6723 | 257 | |
484ca79c TH |
258 | if (acl->perm & (1 << r->param.path.operation)) { |
259 | r->param.path.matched_path = | |
260 | tomoyo_compare_name_union(r->param.path.filename, | |
261 | &acl->name); | |
262 | return r->param.path.matched_path != NULL; | |
263 | } | |
264 | return false; | |
99a85259 | 265 | } |
b69a54ee | 266 | |
0df7e8b8 TH |
267 | /** |
268 | * tomoyo_check_path_number_acl - Check permission for path number operation. | |
269 | * | |
270 | * @r: Pointer to "struct tomoyo_request_info". | |
271 | * @ptr: Pointer to "struct tomoyo_acl_info". | |
272 | * | |
273 | * Returns true if granted, false otherwise. | |
274 | */ | |
484ca79c | 275 | static bool tomoyo_check_path_number_acl(struct tomoyo_request_info *r, |
99a85259 TH |
276 | const struct tomoyo_acl_info *ptr) |
277 | { | |
278 | const struct tomoyo_path_number_acl *acl = | |
279 | container_of(ptr, typeof(*acl), head); | |
cdcf6723 | 280 | |
99a85259 TH |
281 | return (acl->perm & (1 << r->param.path_number.operation)) && |
282 | tomoyo_compare_number_union(r->param.path_number.number, | |
283 | &acl->number) && | |
284 | tomoyo_compare_name_union(r->param.path_number.filename, | |
285 | &acl->name); | |
286 | } | |
287 | ||
0df7e8b8 TH |
288 | /** |
289 | * tomoyo_check_path2_acl - Check permission for path path operation. | |
290 | * | |
291 | * @r: Pointer to "struct tomoyo_request_info". | |
292 | * @ptr: Pointer to "struct tomoyo_acl_info". | |
293 | * | |
294 | * Returns true if granted, false otherwise. | |
295 | */ | |
484ca79c | 296 | static bool tomoyo_check_path2_acl(struct tomoyo_request_info *r, |
99a85259 TH |
297 | const struct tomoyo_acl_info *ptr) |
298 | { | |
299 | const struct tomoyo_path2_acl *acl = | |
300 | container_of(ptr, typeof(*acl), head); | |
cdcf6723 | 301 | |
99a85259 TH |
302 | return (acl->perm & (1 << r->param.path2.operation)) && |
303 | tomoyo_compare_name_union(r->param.path2.filename1, &acl->name1) | |
304 | && tomoyo_compare_name_union(r->param.path2.filename2, | |
305 | &acl->name2); | |
306 | } | |
307 | ||
0df7e8b8 TH |
308 | /** |
309 | * tomoyo_check_mkdev_acl - Check permission for path number number number operation. | |
310 | * | |
311 | * @r: Pointer to "struct tomoyo_request_info". | |
312 | * @ptr: Pointer to "struct tomoyo_acl_info". | |
313 | * | |
314 | * Returns true if granted, false otherwise. | |
315 | */ | |
484ca79c | 316 | static bool tomoyo_check_mkdev_acl(struct tomoyo_request_info *r, |
0df7e8b8 | 317 | const struct tomoyo_acl_info *ptr) |
99a85259 | 318 | { |
75093152 | 319 | const struct tomoyo_mkdev_acl *acl = |
99a85259 | 320 | container_of(ptr, typeof(*acl), head); |
cdcf6723 | 321 | |
99a85259 TH |
322 | return (acl->perm & (1 << r->param.mkdev.operation)) && |
323 | tomoyo_compare_number_union(r->param.mkdev.mode, | |
324 | &acl->mode) && | |
325 | tomoyo_compare_number_union(r->param.mkdev.major, | |
326 | &acl->major) && | |
327 | tomoyo_compare_number_union(r->param.mkdev.minor, | |
328 | &acl->minor) && | |
329 | tomoyo_compare_name_union(r->param.mkdev.filename, | |
330 | &acl->name); | |
b69a54ee KT |
331 | } |
332 | ||
0df7e8b8 TH |
333 | /** |
334 | * tomoyo_same_path_acl - Check for duplicated "struct tomoyo_path_acl" entry. | |
335 | * | |
336 | * @a: Pointer to "struct tomoyo_acl_info". | |
337 | * @b: Pointer to "struct tomoyo_acl_info". | |
338 | * | |
339 | * Returns true if @a == @b except permission bits, false otherwise. | |
340 | */ | |
237ab459 TH |
341 | static bool tomoyo_same_path_acl(const struct tomoyo_acl_info *a, |
342 | const struct tomoyo_acl_info *b) | |
343 | { | |
344 | const struct tomoyo_path_acl *p1 = container_of(a, typeof(*p1), head); | |
345 | const struct tomoyo_path_acl *p2 = container_of(b, typeof(*p2), head); | |
cdcf6723 | 346 | |
0df7e8b8 | 347 | return tomoyo_same_name_union(&p1->name, &p2->name); |
237ab459 TH |
348 | } |
349 | ||
7c75964f TH |
350 | /** |
351 | * tomoyo_merge_path_acl - Merge duplicated "struct tomoyo_path_acl" entry. | |
352 | * | |
353 | * @a: Pointer to "struct tomoyo_acl_info". | |
354 | * @b: Pointer to "struct tomoyo_acl_info". | |
355 | * @is_delete: True for @a &= ~@b, false for @a |= @b. | |
356 | * | |
357 | * Returns true if @a is empty, false otherwise. | |
358 | */ | |
237ab459 TH |
359 | static bool tomoyo_merge_path_acl(struct tomoyo_acl_info *a, |
360 | struct tomoyo_acl_info *b, | |
361 | const bool is_delete) | |
362 | { | |
363 | u16 * const a_perm = &container_of(a, struct tomoyo_path_acl, head) | |
364 | ->perm; | |
365 | u16 perm = *a_perm; | |
366 | const u16 b_perm = container_of(b, struct tomoyo_path_acl, head)->perm; | |
cdcf6723 | 367 | |
7c75964f | 368 | if (is_delete) |
237ab459 | 369 | perm &= ~b_perm; |
7c75964f | 370 | else |
237ab459 | 371 | perm |= b_perm; |
237ab459 TH |
372 | *a_perm = perm; |
373 | return !perm; | |
374 | } | |
375 | ||
b69a54ee | 376 | /** |
7ef61233 | 377 | * tomoyo_update_path_acl - Update "struct tomoyo_path_acl" list. |
b69a54ee | 378 | * |
a238cf5b TH |
379 | * @perm: Permission. |
380 | * @param: Pointer to "struct tomoyo_acl_param". | |
b69a54ee KT |
381 | * |
382 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
383 | * |
384 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 385 | */ |
a238cf5b TH |
386 | static int tomoyo_update_path_acl(const u16 perm, |
387 | struct tomoyo_acl_param *param) | |
b69a54ee | 388 | { |
9e4b50e9 TH |
389 | struct tomoyo_path_acl e = { |
390 | .head.type = TOMOYO_TYPE_PATH_ACL, | |
a238cf5b | 391 | .perm = perm |
9e4b50e9 | 392 | }; |
237ab459 | 393 | int error; |
cdcf6723 | 394 | |
a238cf5b TH |
395 | if (!tomoyo_parse_name_union(param, &e.name)) |
396 | error = -EINVAL; | |
397 | else | |
398 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
399 | tomoyo_same_path_acl, | |
400 | tomoyo_merge_path_acl); | |
7762fbff | 401 | tomoyo_put_name_union(&e.name); |
b69a54ee KT |
402 | return error; |
403 | } | |
404 | ||
0df7e8b8 TH |
405 | /** |
406 | * tomoyo_same_mkdev_acl - Check for duplicated "struct tomoyo_mkdev_acl" entry. | |
407 | * | |
408 | * @a: Pointer to "struct tomoyo_acl_info". | |
409 | * @b: Pointer to "struct tomoyo_acl_info". | |
410 | * | |
411 | * Returns true if @a == @b except permission bits, false otherwise. | |
412 | */ | |
75093152 | 413 | static bool tomoyo_same_mkdev_acl(const struct tomoyo_acl_info *a, |
237ab459 TH |
414 | const struct tomoyo_acl_info *b) |
415 | { | |
0df7e8b8 TH |
416 | const struct tomoyo_mkdev_acl *p1 = container_of(a, typeof(*p1), head); |
417 | const struct tomoyo_mkdev_acl *p2 = container_of(b, typeof(*p2), head); | |
cdcf6723 | 418 | |
0df7e8b8 TH |
419 | return tomoyo_same_name_union(&p1->name, &p2->name) && |
420 | tomoyo_same_number_union(&p1->mode, &p2->mode) && | |
421 | tomoyo_same_number_union(&p1->major, &p2->major) && | |
422 | tomoyo_same_number_union(&p1->minor, &p2->minor); | |
237ab459 TH |
423 | } |
424 | ||
0df7e8b8 TH |
425 | /** |
426 | * tomoyo_merge_mkdev_acl - Merge duplicated "struct tomoyo_mkdev_acl" entry. | |
427 | * | |
428 | * @a: Pointer to "struct tomoyo_acl_info". | |
429 | * @b: Pointer to "struct tomoyo_acl_info". | |
430 | * @is_delete: True for @a &= ~@b, false for @a |= @b. | |
431 | * | |
432 | * Returns true if @a is empty, false otherwise. | |
433 | */ | |
75093152 | 434 | static bool tomoyo_merge_mkdev_acl(struct tomoyo_acl_info *a, |
0df7e8b8 TH |
435 | struct tomoyo_acl_info *b, |
436 | const bool is_delete) | |
237ab459 | 437 | { |
75093152 | 438 | u8 *const a_perm = &container_of(a, struct tomoyo_mkdev_acl, |
237ab459 TH |
439 | head)->perm; |
440 | u8 perm = *a_perm; | |
75093152 | 441 | const u8 b_perm = container_of(b, struct tomoyo_mkdev_acl, head) |
237ab459 | 442 | ->perm; |
cdcf6723 | 443 | |
237ab459 TH |
444 | if (is_delete) |
445 | perm &= ~b_perm; | |
446 | else | |
447 | perm |= b_perm; | |
448 | *a_perm = perm; | |
449 | return !perm; | |
450 | } | |
451 | ||
a1f9bb6a | 452 | /** |
75093152 | 453 | * tomoyo_update_mkdev_acl - Update "struct tomoyo_mkdev_acl" list. |
a1f9bb6a | 454 | * |
a238cf5b TH |
455 | * @perm: Permission. |
456 | * @param: Pointer to "struct tomoyo_acl_param". | |
a1f9bb6a TH |
457 | * |
458 | * Returns 0 on success, negative value otherwise. | |
237ab459 TH |
459 | * |
460 | * Caller holds tomoyo_read_lock(). | |
a1f9bb6a | 461 | */ |
a238cf5b TH |
462 | static int tomoyo_update_mkdev_acl(const u8 perm, |
463 | struct tomoyo_acl_param *param) | |
a1f9bb6a | 464 | { |
75093152 TH |
465 | struct tomoyo_mkdev_acl e = { |
466 | .head.type = TOMOYO_TYPE_MKDEV_ACL, | |
a238cf5b | 467 | .perm = perm |
a1f9bb6a | 468 | }; |
a238cf5b | 469 | int error; |
cdcf6723 | 470 | |
a238cf5b TH |
471 | if (!tomoyo_parse_name_union(param, &e.name) || |
472 | !tomoyo_parse_number_union(param, &e.mode) || | |
473 | !tomoyo_parse_number_union(param, &e.major) || | |
474 | !tomoyo_parse_number_union(param, &e.minor)) | |
475 | error = -EINVAL; | |
476 | else | |
477 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
478 | tomoyo_same_mkdev_acl, | |
479 | tomoyo_merge_mkdev_acl); | |
a1f9bb6a TH |
480 | tomoyo_put_name_union(&e.name); |
481 | tomoyo_put_number_union(&e.mode); | |
482 | tomoyo_put_number_union(&e.major); | |
483 | tomoyo_put_number_union(&e.minor); | |
484 | return error; | |
485 | } | |
486 | ||
0df7e8b8 TH |
487 | /** |
488 | * tomoyo_same_path2_acl - Check for duplicated "struct tomoyo_path2_acl" entry. | |
489 | * | |
490 | * @a: Pointer to "struct tomoyo_acl_info". | |
491 | * @b: Pointer to "struct tomoyo_acl_info". | |
492 | * | |
493 | * Returns true if @a == @b except permission bits, false otherwise. | |
494 | */ | |
237ab459 TH |
495 | static bool tomoyo_same_path2_acl(const struct tomoyo_acl_info *a, |
496 | const struct tomoyo_acl_info *b) | |
497 | { | |
498 | const struct tomoyo_path2_acl *p1 = container_of(a, typeof(*p1), head); | |
499 | const struct tomoyo_path2_acl *p2 = container_of(b, typeof(*p2), head); | |
cdcf6723 | 500 | |
0df7e8b8 TH |
501 | return tomoyo_same_name_union(&p1->name1, &p2->name1) && |
502 | tomoyo_same_name_union(&p1->name2, &p2->name2); | |
237ab459 TH |
503 | } |
504 | ||
0df7e8b8 TH |
505 | /** |
506 | * tomoyo_merge_path2_acl - Merge duplicated "struct tomoyo_path2_acl" entry. | |
507 | * | |
508 | * @a: Pointer to "struct tomoyo_acl_info". | |
509 | * @b: Pointer to "struct tomoyo_acl_info". | |
510 | * @is_delete: True for @a &= ~@b, false for @a |= @b. | |
511 | * | |
512 | * Returns true if @a is empty, false otherwise. | |
513 | */ | |
237ab459 TH |
514 | static bool tomoyo_merge_path2_acl(struct tomoyo_acl_info *a, |
515 | struct tomoyo_acl_info *b, | |
516 | const bool is_delete) | |
517 | { | |
518 | u8 * const a_perm = &container_of(a, struct tomoyo_path2_acl, head) | |
519 | ->perm; | |
520 | u8 perm = *a_perm; | |
521 | const u8 b_perm = container_of(b, struct tomoyo_path2_acl, head)->perm; | |
cdcf6723 | 522 | |
237ab459 TH |
523 | if (is_delete) |
524 | perm &= ~b_perm; | |
525 | else | |
526 | perm |= b_perm; | |
527 | *a_perm = perm; | |
528 | return !perm; | |
529 | } | |
530 | ||
b69a54ee | 531 | /** |
7ef61233 | 532 | * tomoyo_update_path2_acl - Update "struct tomoyo_path2_acl" list. |
b69a54ee | 533 | * |
a238cf5b TH |
534 | * @perm: Permission. |
535 | * @param: Pointer to "struct tomoyo_acl_param". | |
b69a54ee KT |
536 | * |
537 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
538 | * |
539 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 540 | */ |
a238cf5b TH |
541 | static int tomoyo_update_path2_acl(const u8 perm, |
542 | struct tomoyo_acl_param *param) | |
b69a54ee | 543 | { |
9e4b50e9 TH |
544 | struct tomoyo_path2_acl e = { |
545 | .head.type = TOMOYO_TYPE_PATH2_ACL, | |
a238cf5b | 546 | .perm = perm |
9e4b50e9 | 547 | }; |
a238cf5b | 548 | int error; |
cdcf6723 | 549 | |
a238cf5b TH |
550 | if (!tomoyo_parse_name_union(param, &e.name1) || |
551 | !tomoyo_parse_name_union(param, &e.name2)) | |
552 | error = -EINVAL; | |
553 | else | |
554 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
555 | tomoyo_same_path2_acl, | |
556 | tomoyo_merge_path2_acl); | |
7762fbff TH |
557 | tomoyo_put_name_union(&e.name1); |
558 | tomoyo_put_name_union(&e.name2); | |
b69a54ee KT |
559 | return error; |
560 | } | |
561 | ||
b69a54ee | 562 | /** |
cb0abe6a | 563 | * tomoyo_path_permission - Check permission for single path operation. |
b69a54ee | 564 | * |
cb0abe6a | 565 | * @r: Pointer to "struct tomoyo_request_info". |
b69a54ee KT |
566 | * @operation: Type of operation. |
567 | * @filename: Filename to check. | |
b69a54ee KT |
568 | * |
569 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
570 | * |
571 | * Caller holds tomoyo_read_lock(). | |
b69a54ee | 572 | */ |
778c4a4d TH |
573 | static int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation, |
574 | const struct tomoyo_path_info *filename) | |
b69a54ee | 575 | { |
b69a54ee | 576 | int error; |
b69a54ee | 577 | |
57c2590f | 578 | r->type = tomoyo_p2mac[operation]; |
bd03a3e4 | 579 | r->mode = tomoyo_get_mode(r->domain->ns, r->profile, r->type); |
57c2590f TH |
580 | if (r->mode == TOMOYO_CONFIG_DISABLED) |
581 | return 0; | |
cf6e9a64 TH |
582 | r->param_type = TOMOYO_TYPE_PATH_ACL; |
583 | r->param.path.filename = filename; | |
584 | r->param.path.operation = operation; | |
17fcfbd9 | 585 | do { |
99a85259 | 586 | tomoyo_check_acl(r, tomoyo_check_path_acl); |
99a85259 | 587 | error = tomoyo_audit_path_log(r); |
6bce98ed | 588 | } while (error == TOMOYO_RETRY_REQUEST); |
b69a54ee KT |
589 | return error; |
590 | } | |
591 | ||
6bce98ed TH |
592 | /** |
593 | * tomoyo_execute_permission - Check permission for execute operation. | |
594 | * | |
595 | * @r: Pointer to "struct tomoyo_request_info". | |
596 | * @filename: Filename to check. | |
597 | * | |
598 | * Returns 0 on success, negative value otherwise. | |
599 | * | |
600 | * Caller holds tomoyo_read_lock(). | |
601 | */ | |
602 | int tomoyo_execute_permission(struct tomoyo_request_info *r, | |
603 | const struct tomoyo_path_info *filename) | |
604 | { | |
605 | /* | |
606 | * Unlike other permission checks, this check is done regardless of | |
607 | * profile mode settings in order to check for domain transition | |
608 | * preference. | |
609 | */ | |
610 | r->type = TOMOYO_MAC_FILE_EXECUTE; | |
611 | r->mode = tomoyo_get_mode(r->domain->ns, r->profile, r->type); | |
612 | r->param_type = TOMOYO_TYPE_PATH_ACL; | |
613 | r->param.path.filename = filename; | |
614 | r->param.path.operation = TOMOYO_TYPE_EXECUTE; | |
615 | tomoyo_check_acl(r, tomoyo_check_path_acl); | |
616 | r->ee->transition = r->matched_acl && r->matched_acl->cond ? | |
617 | r->matched_acl->cond->transit : NULL; | |
618 | if (r->mode != TOMOYO_CONFIG_DISABLED) | |
619 | return tomoyo_audit_path_log(r); | |
620 | return 0; | |
621 | } | |
622 | ||
0df7e8b8 TH |
623 | /** |
624 | * tomoyo_same_path_number_acl - Check for duplicated "struct tomoyo_path_number_acl" entry. | |
625 | * | |
626 | * @a: Pointer to "struct tomoyo_acl_info". | |
627 | * @b: Pointer to "struct tomoyo_acl_info". | |
628 | * | |
629 | * Returns true if @a == @b except permission bits, false otherwise. | |
630 | */ | |
237ab459 TH |
631 | static bool tomoyo_same_path_number_acl(const struct tomoyo_acl_info *a, |
632 | const struct tomoyo_acl_info *b) | |
633 | { | |
634 | const struct tomoyo_path_number_acl *p1 = container_of(a, typeof(*p1), | |
635 | head); | |
636 | const struct tomoyo_path_number_acl *p2 = container_of(b, typeof(*p2), | |
637 | head); | |
cdcf6723 | 638 | |
0df7e8b8 TH |
639 | return tomoyo_same_name_union(&p1->name, &p2->name) && |
640 | tomoyo_same_number_union(&p1->number, &p2->number); | |
237ab459 TH |
641 | } |
642 | ||
0df7e8b8 TH |
643 | /** |
644 | * tomoyo_merge_path_number_acl - Merge duplicated "struct tomoyo_path_number_acl" entry. | |
645 | * | |
646 | * @a: Pointer to "struct tomoyo_acl_info". | |
647 | * @b: Pointer to "struct tomoyo_acl_info". | |
648 | * @is_delete: True for @a &= ~@b, false for @a |= @b. | |
649 | * | |
650 | * Returns true if @a is empty, false otherwise. | |
651 | */ | |
237ab459 TH |
652 | static bool tomoyo_merge_path_number_acl(struct tomoyo_acl_info *a, |
653 | struct tomoyo_acl_info *b, | |
654 | const bool is_delete) | |
655 | { | |
656 | u8 * const a_perm = &container_of(a, struct tomoyo_path_number_acl, | |
657 | head)->perm; | |
658 | u8 perm = *a_perm; | |
659 | const u8 b_perm = container_of(b, struct tomoyo_path_number_acl, head) | |
660 | ->perm; | |
cdcf6723 | 661 | |
237ab459 TH |
662 | if (is_delete) |
663 | perm &= ~b_perm; | |
664 | else | |
665 | perm |= b_perm; | |
666 | *a_perm = perm; | |
667 | return !perm; | |
668 | } | |
669 | ||
a1f9bb6a TH |
670 | /** |
671 | * tomoyo_update_path_number_acl - Update ioctl/chmod/chown/chgrp ACL. | |
672 | * | |
a238cf5b TH |
673 | * @perm: Permission. |
674 | * @param: Pointer to "struct tomoyo_acl_param". | |
a1f9bb6a TH |
675 | * |
676 | * Returns 0 on success, negative value otherwise. | |
677 | */ | |
a238cf5b TH |
678 | static int tomoyo_update_path_number_acl(const u8 perm, |
679 | struct tomoyo_acl_param *param) | |
a1f9bb6a | 680 | { |
a1f9bb6a TH |
681 | struct tomoyo_path_number_acl e = { |
682 | .head.type = TOMOYO_TYPE_PATH_NUMBER_ACL, | |
a238cf5b | 683 | .perm = perm |
a1f9bb6a | 684 | }; |
a238cf5b | 685 | int error; |
cdcf6723 | 686 | |
a238cf5b TH |
687 | if (!tomoyo_parse_name_union(param, &e.name) || |
688 | !tomoyo_parse_number_union(param, &e.number)) | |
689 | error = -EINVAL; | |
690 | else | |
691 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
692 | tomoyo_same_path_number_acl, | |
693 | tomoyo_merge_path_number_acl); | |
a1f9bb6a TH |
694 | tomoyo_put_name_union(&e.name); |
695 | tomoyo_put_number_union(&e.number); | |
696 | return error; | |
697 | } | |
698 | ||
a1f9bb6a TH |
699 | /** |
700 | * tomoyo_path_number_perm - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp". | |
701 | * | |
702 | * @type: Type of operation. | |
703 | * @path: Pointer to "struct path". | |
704 | * @number: Number. | |
705 | * | |
706 | * Returns 0 on success, negative value otherwise. | |
707 | */ | |
e6641edd | 708 | int tomoyo_path_number_perm(const u8 type, const struct path *path, |
a1f9bb6a TH |
709 | unsigned long number) |
710 | { | |
711 | struct tomoyo_request_info r; | |
97fb35e4 | 712 | struct tomoyo_obj_info obj = { |
8291798d | 713 | .path1 = { .mnt = path->mnt, .dentry = path->dentry }, |
97fb35e4 | 714 | }; |
a1f9bb6a | 715 | int error = -ENOMEM; |
c8c57e84 | 716 | struct tomoyo_path_info buf; |
a1f9bb6a TH |
717 | int idx; |
718 | ||
57c2590f | 719 | if (tomoyo_init_request_info(&r, NULL, tomoyo_pn2mac[type]) |
5625f2e3 | 720 | == TOMOYO_CONFIG_DISABLED || !path->dentry) |
a1f9bb6a TH |
721 | return 0; |
722 | idx = tomoyo_read_lock(); | |
c8c57e84 | 723 | if (!tomoyo_get_realpath(&buf, path)) |
a1f9bb6a | 724 | goto out; |
97fb35e4 | 725 | r.obj = &obj; |
c8c57e84 TH |
726 | if (type == TOMOYO_TYPE_MKDIR) |
727 | tomoyo_add_slash(&buf); | |
cb917cf5 TH |
728 | r.param_type = TOMOYO_TYPE_PATH_NUMBER_ACL; |
729 | r.param.path_number.operation = type; | |
730 | r.param.path_number.filename = &buf; | |
731 | r.param.path_number.number = number; | |
732 | do { | |
733 | tomoyo_check_acl(&r, tomoyo_check_path_number_acl); | |
734 | error = tomoyo_audit_path_number_log(&r); | |
735 | } while (error == TOMOYO_RETRY_REQUEST); | |
c8c57e84 | 736 | kfree(buf.name); |
cb917cf5 | 737 | out: |
a1f9bb6a TH |
738 | tomoyo_read_unlock(idx); |
739 | if (r.mode != TOMOYO_CONFIG_ENFORCING) | |
740 | error = 0; | |
741 | return error; | |
742 | } | |
743 | ||
b69a54ee KT |
744 | /** |
745 | * tomoyo_check_open_permission - Check permission for "read" and "write". | |
746 | * | |
747 | * @domain: Pointer to "struct tomoyo_domain_info". | |
748 | * @path: Pointer to "struct path". | |
749 | * @flag: Flags for open(). | |
750 | * | |
751 | * Returns 0 on success, negative value otherwise. | |
752 | */ | |
753 | int tomoyo_check_open_permission(struct tomoyo_domain_info *domain, | |
e6641edd | 754 | const struct path *path, const int flag) |
b69a54ee KT |
755 | { |
756 | const u8 acc_mode = ACC_MODE(flag); | |
eae61f3c | 757 | int error = 0; |
c8c57e84 | 758 | struct tomoyo_path_info buf; |
cb0abe6a | 759 | struct tomoyo_request_info r; |
97fb35e4 | 760 | struct tomoyo_obj_info obj = { |
8291798d | 761 | .path1 = { .mnt = path->mnt, .dentry = path->dentry }, |
97fb35e4 | 762 | }; |
fdb8ebb7 | 763 | int idx; |
b69a54ee | 764 | |
57c2590f TH |
765 | buf.name = NULL; |
766 | r.mode = TOMOYO_CONFIG_DISABLED; | |
fdb8ebb7 | 767 | idx = tomoyo_read_lock(); |
7c75964f TH |
768 | if (acc_mode && |
769 | tomoyo_init_request_info(&r, domain, TOMOYO_MAC_FILE_OPEN) | |
57c2590f TH |
770 | != TOMOYO_CONFIG_DISABLED) { |
771 | if (!tomoyo_get_realpath(&buf, path)) { | |
772 | error = -ENOMEM; | |
773 | goto out; | |
774 | } | |
97fb35e4 | 775 | r.obj = &obj; |
7c75964f TH |
776 | if (acc_mode & MAY_READ) |
777 | error = tomoyo_path_permission(&r, TOMOYO_TYPE_READ, | |
778 | &buf); | |
779 | if (!error && (acc_mode & MAY_WRITE)) | |
780 | error = tomoyo_path_permission(&r, (flag & O_APPEND) ? | |
781 | TOMOYO_TYPE_APPEND : | |
782 | TOMOYO_TYPE_WRITE, | |
57c2590f | 783 | &buf); |
57c2590f | 784 | } |
b69a54ee | 785 | out: |
c8c57e84 | 786 | kfree(buf.name); |
fdb8ebb7 | 787 | tomoyo_read_unlock(idx); |
cb0abe6a | 788 | if (r.mode != TOMOYO_CONFIG_ENFORCING) |
b69a54ee KT |
789 | error = 0; |
790 | return error; | |
791 | } | |
792 | ||
793 | /** | |
7c75964f | 794 | * tomoyo_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "append", "chroot" and "unmount". |
b69a54ee | 795 | * |
b69a54ee KT |
796 | * @operation: Type of operation. |
797 | * @path: Pointer to "struct path". | |
97fb35e4 TH |
798 | * @target: Symlink's target if @operation is TOMOYO_TYPE_SYMLINK, |
799 | * NULL otherwise. | |
b69a54ee KT |
800 | * |
801 | * Returns 0 on success, negative value otherwise. | |
802 | */ | |
3f7036a0 | 803 | int tomoyo_path_perm(const u8 operation, const struct path *path, const char *target) |
b69a54ee | 804 | { |
cb0abe6a | 805 | struct tomoyo_request_info r; |
97fb35e4 | 806 | struct tomoyo_obj_info obj = { |
8291798d | 807 | .path1 = { .mnt = path->mnt, .dentry = path->dentry }, |
97fb35e4 | 808 | }; |
7c75964f TH |
809 | int error; |
810 | struct tomoyo_path_info buf; | |
811 | bool is_enforce; | |
97fb35e4 | 812 | struct tomoyo_path_info symlink_target; |
fdb8ebb7 | 813 | int idx; |
b69a54ee | 814 | |
57c2590f TH |
815 | if (tomoyo_init_request_info(&r, NULL, tomoyo_p2mac[operation]) |
816 | == TOMOYO_CONFIG_DISABLED) | |
b69a54ee | 817 | return 0; |
7c75964f TH |
818 | is_enforce = (r.mode == TOMOYO_CONFIG_ENFORCING); |
819 | error = -ENOMEM; | |
57c2590f | 820 | buf.name = NULL; |
fdb8ebb7 | 821 | idx = tomoyo_read_lock(); |
c8c57e84 | 822 | if (!tomoyo_get_realpath(&buf, path)) |
b69a54ee | 823 | goto out; |
97fb35e4 | 824 | r.obj = &obj; |
b69a54ee | 825 | switch (operation) { |
7ef61233 TH |
826 | case TOMOYO_TYPE_RMDIR: |
827 | case TOMOYO_TYPE_CHROOT: | |
c8c57e84 TH |
828 | tomoyo_add_slash(&buf); |
829 | break; | |
97fb35e4 TH |
830 | case TOMOYO_TYPE_SYMLINK: |
831 | symlink_target.name = tomoyo_encode(target); | |
832 | if (!symlink_target.name) | |
833 | goto out; | |
834 | tomoyo_fill_path_info(&symlink_target); | |
835 | obj.symlink_target = &symlink_target; | |
836 | break; | |
b69a54ee | 837 | } |
c8c57e84 | 838 | error = tomoyo_path_permission(&r, operation, &buf); |
97fb35e4 TH |
839 | if (operation == TOMOYO_TYPE_SYMLINK) |
840 | kfree(symlink_target.name); | |
b69a54ee | 841 | out: |
c8c57e84 | 842 | kfree(buf.name); |
fdb8ebb7 | 843 | tomoyo_read_unlock(idx); |
7c75964f | 844 | if (!is_enforce) |
b69a54ee KT |
845 | error = 0; |
846 | return error; | |
847 | } | |
848 | ||
a1f9bb6a | 849 | /** |
75093152 | 850 | * tomoyo_mkdev_perm - Check permission for "mkblock" and "mkchar". |
a1f9bb6a TH |
851 | * |
852 | * @operation: Type of operation. (TOMOYO_TYPE_MKCHAR or TOMOYO_TYPE_MKBLOCK) | |
853 | * @path: Pointer to "struct path". | |
854 | * @mode: Create mode. | |
855 | * @dev: Device number. | |
856 | * | |
857 | * Returns 0 on success, negative value otherwise. | |
858 | */ | |
e6641edd | 859 | int tomoyo_mkdev_perm(const u8 operation, const struct path *path, |
0df7e8b8 | 860 | const unsigned int mode, unsigned int dev) |
a1f9bb6a TH |
861 | { |
862 | struct tomoyo_request_info r; | |
97fb35e4 | 863 | struct tomoyo_obj_info obj = { |
8291798d | 864 | .path1 = { .mnt = path->mnt, .dentry = path->dentry }, |
97fb35e4 | 865 | }; |
a1f9bb6a | 866 | int error = -ENOMEM; |
c8c57e84 | 867 | struct tomoyo_path_info buf; |
a1f9bb6a TH |
868 | int idx; |
869 | ||
5625f2e3 | 870 | if (tomoyo_init_request_info(&r, NULL, tomoyo_pnnn2mac[operation]) |
57c2590f | 871 | == TOMOYO_CONFIG_DISABLED) |
a1f9bb6a TH |
872 | return 0; |
873 | idx = tomoyo_read_lock(); | |
874 | error = -ENOMEM; | |
c8c57e84 | 875 | if (tomoyo_get_realpath(&buf, path)) { |
97fb35e4 | 876 | r.obj = &obj; |
cf6e9a64 | 877 | dev = new_decode_dev(dev); |
75093152 | 878 | r.param_type = TOMOYO_TYPE_MKDEV_ACL; |
cf6e9a64 TH |
879 | r.param.mkdev.filename = &buf; |
880 | r.param.mkdev.operation = operation; | |
881 | r.param.mkdev.mode = mode; | |
882 | r.param.mkdev.major = MAJOR(dev); | |
883 | r.param.mkdev.minor = MINOR(dev); | |
99a85259 TH |
884 | tomoyo_check_acl(&r, tomoyo_check_mkdev_acl); |
885 | error = tomoyo_audit_mkdev_log(&r); | |
c8c57e84 | 886 | kfree(buf.name); |
a1f9bb6a TH |
887 | } |
888 | tomoyo_read_unlock(idx); | |
889 | if (r.mode != TOMOYO_CONFIG_ENFORCING) | |
890 | error = 0; | |
891 | return error; | |
892 | } | |
893 | ||
b69a54ee | 894 | /** |
7ef61233 | 895 | * tomoyo_path2_perm - Check permission for "rename", "link" and "pivot_root". |
b69a54ee | 896 | * |
b69a54ee KT |
897 | * @operation: Type of operation. |
898 | * @path1: Pointer to "struct path". | |
899 | * @path2: Pointer to "struct path". | |
900 | * | |
901 | * Returns 0 on success, negative value otherwise. | |
902 | */ | |
e6641edd AV |
903 | int tomoyo_path2_perm(const u8 operation, const struct path *path1, |
904 | const struct path *path2) | |
b69a54ee KT |
905 | { |
906 | int error = -ENOMEM; | |
c8c57e84 TH |
907 | struct tomoyo_path_info buf1; |
908 | struct tomoyo_path_info buf2; | |
cb0abe6a | 909 | struct tomoyo_request_info r; |
97fb35e4 | 910 | struct tomoyo_obj_info obj = { |
8291798d KC |
911 | .path1 = { .mnt = path1->mnt, .dentry = path1->dentry }, |
912 | .path2 = { .mnt = path2->mnt, .dentry = path2->dentry } | |
97fb35e4 | 913 | }; |
fdb8ebb7 | 914 | int idx; |
b69a54ee | 915 | |
5625f2e3 | 916 | if (tomoyo_init_request_info(&r, NULL, tomoyo_pp2mac[operation]) |
57c2590f | 917 | == TOMOYO_CONFIG_DISABLED) |
b69a54ee | 918 | return 0; |
c8c57e84 TH |
919 | buf1.name = NULL; |
920 | buf2.name = NULL; | |
fdb8ebb7 | 921 | idx = tomoyo_read_lock(); |
c8c57e84 TH |
922 | if (!tomoyo_get_realpath(&buf1, path1) || |
923 | !tomoyo_get_realpath(&buf2, path2)) | |
b69a54ee | 924 | goto out; |
57c2590f | 925 | switch (operation) { |
57c2590f | 926 | case TOMOYO_TYPE_RENAME: |
0f2a55d5 | 927 | case TOMOYO_TYPE_LINK: |
e656a8eb | 928 | if (!d_is_dir(path1->dentry)) |
0f2a55d5 TH |
929 | break; |
930 | /* fall through */ | |
931 | case TOMOYO_TYPE_PIVOT_ROOT: | |
932 | tomoyo_add_slash(&buf1); | |
933 | tomoyo_add_slash(&buf2); | |
57c2590f | 934 | break; |
0f2a55d5 | 935 | } |
97fb35e4 | 936 | r.obj = &obj; |
cf6e9a64 TH |
937 | r.param_type = TOMOYO_TYPE_PATH2_ACL; |
938 | r.param.path2.operation = operation; | |
939 | r.param.path2.filename1 = &buf1; | |
940 | r.param.path2.filename2 = &buf2; | |
17fcfbd9 | 941 | do { |
99a85259 TH |
942 | tomoyo_check_acl(&r, tomoyo_check_path2_acl); |
943 | error = tomoyo_audit_path2_log(&r); | |
944 | } while (error == TOMOYO_RETRY_REQUEST); | |
b69a54ee | 945 | out: |
c8c57e84 TH |
946 | kfree(buf1.name); |
947 | kfree(buf2.name); | |
fdb8ebb7 | 948 | tomoyo_read_unlock(idx); |
cb0abe6a | 949 | if (r.mode != TOMOYO_CONFIG_ENFORCING) |
b69a54ee KT |
950 | error = 0; |
951 | return error; | |
952 | } | |
a1f9bb6a | 953 | |
a238cf5b TH |
954 | /** |
955 | * tomoyo_same_mount_acl - Check for duplicated "struct tomoyo_mount_acl" entry. | |
956 | * | |
957 | * @a: Pointer to "struct tomoyo_acl_info". | |
958 | * @b: Pointer to "struct tomoyo_acl_info". | |
959 | * | |
960 | * Returns true if @a == @b, false otherwise. | |
961 | */ | |
962 | static bool tomoyo_same_mount_acl(const struct tomoyo_acl_info *a, | |
963 | const struct tomoyo_acl_info *b) | |
964 | { | |
965 | const struct tomoyo_mount_acl *p1 = container_of(a, typeof(*p1), head); | |
966 | const struct tomoyo_mount_acl *p2 = container_of(b, typeof(*p2), head); | |
cdcf6723 | 967 | |
a238cf5b TH |
968 | return tomoyo_same_name_union(&p1->dev_name, &p2->dev_name) && |
969 | tomoyo_same_name_union(&p1->dir_name, &p2->dir_name) && | |
970 | tomoyo_same_name_union(&p1->fs_type, &p2->fs_type) && | |
971 | tomoyo_same_number_union(&p1->flags, &p2->flags); | |
972 | } | |
973 | ||
974 | /** | |
975 | * tomoyo_update_mount_acl - Write "struct tomoyo_mount_acl" list. | |
976 | * | |
977 | * @param: Pointer to "struct tomoyo_acl_param". | |
978 | * | |
979 | * Returns 0 on success, negative value otherwise. | |
980 | * | |
981 | * Caller holds tomoyo_read_lock(). | |
982 | */ | |
983 | static int tomoyo_update_mount_acl(struct tomoyo_acl_param *param) | |
984 | { | |
985 | struct tomoyo_mount_acl e = { .head.type = TOMOYO_TYPE_MOUNT_ACL }; | |
986 | int error; | |
cdcf6723 | 987 | |
a238cf5b TH |
988 | if (!tomoyo_parse_name_union(param, &e.dev_name) || |
989 | !tomoyo_parse_name_union(param, &e.dir_name) || | |
990 | !tomoyo_parse_name_union(param, &e.fs_type) || | |
991 | !tomoyo_parse_number_union(param, &e.flags)) | |
992 | error = -EINVAL; | |
993 | else | |
994 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
995 | tomoyo_same_mount_acl, NULL); | |
996 | tomoyo_put_name_union(&e.dev_name); | |
997 | tomoyo_put_name_union(&e.dir_name); | |
998 | tomoyo_put_name_union(&e.fs_type); | |
999 | tomoyo_put_number_union(&e.flags); | |
1000 | return error; | |
1001 | } | |
1002 | ||
a1f9bb6a | 1003 | /** |
e2bf6907 | 1004 | * tomoyo_write_file - Update file related list. |
a1f9bb6a | 1005 | * |
a238cf5b | 1006 | * @param: Pointer to "struct tomoyo_acl_param". |
a1f9bb6a TH |
1007 | * |
1008 | * Returns 0 on success, negative value otherwise. | |
1009 | * | |
1010 | * Caller holds tomoyo_read_lock(). | |
1011 | */ | |
a238cf5b | 1012 | int tomoyo_write_file(struct tomoyo_acl_param *param) |
a1f9bb6a | 1013 | { |
a238cf5b | 1014 | u16 perm = 0; |
a1f9bb6a | 1015 | u8 type; |
a238cf5b | 1016 | const char *operation = tomoyo_read_token(param); |
cdcf6723 | 1017 | |
a238cf5b TH |
1018 | for (type = 0; type < TOMOYO_MAX_PATH_OPERATION; type++) |
1019 | if (tomoyo_permstr(operation, tomoyo_path_keyword[type])) | |
1020 | perm |= 1 << type; | |
1021 | if (perm) | |
1022 | return tomoyo_update_path_acl(perm, param); | |
1023 | for (type = 0; type < TOMOYO_MAX_PATH2_OPERATION; type++) | |
2c47ab93 TH |
1024 | if (tomoyo_permstr(operation, |
1025 | tomoyo_mac_keywords[tomoyo_pp2mac[type]])) | |
a238cf5b TH |
1026 | perm |= 1 << type; |
1027 | if (perm) | |
1028 | return tomoyo_update_path2_acl(perm, param); | |
1029 | for (type = 0; type < TOMOYO_MAX_PATH_NUMBER_OPERATION; type++) | |
1030 | if (tomoyo_permstr(operation, | |
2c47ab93 | 1031 | tomoyo_mac_keywords[tomoyo_pn2mac[type]])) |
a238cf5b TH |
1032 | perm |= 1 << type; |
1033 | if (perm) | |
1034 | return tomoyo_update_path_number_acl(perm, param); | |
1035 | for (type = 0; type < TOMOYO_MAX_MKDEV_OPERATION; type++) | |
2c47ab93 TH |
1036 | if (tomoyo_permstr(operation, |
1037 | tomoyo_mac_keywords[tomoyo_pnnn2mac[type]])) | |
a238cf5b TH |
1038 | perm |= 1 << type; |
1039 | if (perm) | |
1040 | return tomoyo_update_mkdev_acl(perm, param); | |
2c47ab93 TH |
1041 | if (tomoyo_permstr(operation, |
1042 | tomoyo_mac_keywords[TOMOYO_MAC_FILE_MOUNT])) | |
a238cf5b | 1043 | return tomoyo_update_mount_acl(param); |
a1f9bb6a TH |
1044 | return -EINVAL; |
1045 | } |