2 * security/tomoyo/file.c
4 * Pathname restriction functions.
6 * Copyright (C) 2005-2010 NTT DATA CORPORATION
10 #include <linux/slab.h>
12 /* Keyword array for operations with one pathname. */
13 const char *tomoyo_path_keyword
[TOMOYO_MAX_PATH_OPERATION
] = {
14 [TOMOYO_TYPE_EXECUTE
] = "execute",
15 [TOMOYO_TYPE_READ
] = "read",
16 [TOMOYO_TYPE_WRITE
] = "write",
17 [TOMOYO_TYPE_APPEND
] = "append",
18 [TOMOYO_TYPE_UNLINK
] = "unlink",
19 [TOMOYO_TYPE_GETATTR
] = "getattr",
20 [TOMOYO_TYPE_RMDIR
] = "rmdir",
21 [TOMOYO_TYPE_TRUNCATE
] = "truncate",
22 [TOMOYO_TYPE_SYMLINK
] = "symlink",
23 [TOMOYO_TYPE_CHROOT
] = "chroot",
24 [TOMOYO_TYPE_UMOUNT
] = "unmount",
27 /* Keyword array for operations with one pathname and three numbers. */
28 const char *tomoyo_mkdev_keyword
[TOMOYO_MAX_MKDEV_OPERATION
] = {
29 [TOMOYO_TYPE_MKBLOCK
] = "mkblock",
30 [TOMOYO_TYPE_MKCHAR
] = "mkchar",
33 /* Keyword array for operations with two pathnames. */
34 const char *tomoyo_path2_keyword
[TOMOYO_MAX_PATH2_OPERATION
] = {
35 [TOMOYO_TYPE_LINK
] = "link",
36 [TOMOYO_TYPE_RENAME
] = "rename",
37 [TOMOYO_TYPE_PIVOT_ROOT
] = "pivot_root",
40 /* Keyword array for operations with one pathname and one number. */
41 const char *tomoyo_path_number_keyword
[TOMOYO_MAX_PATH_NUMBER_OPERATION
] = {
42 [TOMOYO_TYPE_CREATE
] = "create",
43 [TOMOYO_TYPE_MKDIR
] = "mkdir",
44 [TOMOYO_TYPE_MKFIFO
] = "mkfifo",
45 [TOMOYO_TYPE_MKSOCK
] = "mksock",
46 [TOMOYO_TYPE_IOCTL
] = "ioctl",
47 [TOMOYO_TYPE_CHMOD
] = "chmod",
48 [TOMOYO_TYPE_CHOWN
] = "chown",
49 [TOMOYO_TYPE_CHGRP
] = "chgrp",
53 * Mapping table from "enum tomoyo_path_acl_index" to "enum tomoyo_mac_index".
55 static const u8 tomoyo_p2mac
[TOMOYO_MAX_PATH_OPERATION
] = {
56 [TOMOYO_TYPE_EXECUTE
] = TOMOYO_MAC_FILE_EXECUTE
,
57 [TOMOYO_TYPE_READ
] = TOMOYO_MAC_FILE_OPEN
,
58 [TOMOYO_TYPE_WRITE
] = TOMOYO_MAC_FILE_OPEN
,
59 [TOMOYO_TYPE_APPEND
] = TOMOYO_MAC_FILE_OPEN
,
60 [TOMOYO_TYPE_UNLINK
] = TOMOYO_MAC_FILE_UNLINK
,
61 [TOMOYO_TYPE_GETATTR
] = TOMOYO_MAC_FILE_GETATTR
,
62 [TOMOYO_TYPE_RMDIR
] = TOMOYO_MAC_FILE_RMDIR
,
63 [TOMOYO_TYPE_TRUNCATE
] = TOMOYO_MAC_FILE_TRUNCATE
,
64 [TOMOYO_TYPE_SYMLINK
] = TOMOYO_MAC_FILE_SYMLINK
,
65 [TOMOYO_TYPE_CHROOT
] = TOMOYO_MAC_FILE_CHROOT
,
66 [TOMOYO_TYPE_UMOUNT
] = TOMOYO_MAC_FILE_UMOUNT
,
70 * Mapping table from "enum tomoyo_mkdev_acl_index" to "enum tomoyo_mac_index".
72 const u8 tomoyo_pnnn2mac
[TOMOYO_MAX_MKDEV_OPERATION
] = {
73 [TOMOYO_TYPE_MKBLOCK
] = TOMOYO_MAC_FILE_MKBLOCK
,
74 [TOMOYO_TYPE_MKCHAR
] = TOMOYO_MAC_FILE_MKCHAR
,
78 * Mapping table from "enum tomoyo_path2_acl_index" to "enum tomoyo_mac_index".
80 const u8 tomoyo_pp2mac
[TOMOYO_MAX_PATH2_OPERATION
] = {
81 [TOMOYO_TYPE_LINK
] = TOMOYO_MAC_FILE_LINK
,
82 [TOMOYO_TYPE_RENAME
] = TOMOYO_MAC_FILE_RENAME
,
83 [TOMOYO_TYPE_PIVOT_ROOT
] = TOMOYO_MAC_FILE_PIVOT_ROOT
,
87 * Mapping table from "enum tomoyo_path_number_acl_index" to
88 * "enum tomoyo_mac_index".
90 const u8 tomoyo_pn2mac
[TOMOYO_MAX_PATH_NUMBER_OPERATION
] = {
91 [TOMOYO_TYPE_CREATE
] = TOMOYO_MAC_FILE_CREATE
,
92 [TOMOYO_TYPE_MKDIR
] = TOMOYO_MAC_FILE_MKDIR
,
93 [TOMOYO_TYPE_MKFIFO
] = TOMOYO_MAC_FILE_MKFIFO
,
94 [TOMOYO_TYPE_MKSOCK
] = TOMOYO_MAC_FILE_MKSOCK
,
95 [TOMOYO_TYPE_IOCTL
] = TOMOYO_MAC_FILE_IOCTL
,
96 [TOMOYO_TYPE_CHMOD
] = TOMOYO_MAC_FILE_CHMOD
,
97 [TOMOYO_TYPE_CHOWN
] = TOMOYO_MAC_FILE_CHOWN
,
98 [TOMOYO_TYPE_CHGRP
] = TOMOYO_MAC_FILE_CHGRP
,
102 * tomoyo_put_name_union - Drop reference on "struct tomoyo_name_union".
104 * @ptr: Pointer to "struct tomoyo_name_union".
108 void tomoyo_put_name_union(struct tomoyo_name_union
*ptr
)
110 tomoyo_put_group(ptr
->group
);
111 tomoyo_put_name(ptr
->filename
);
115 * tomoyo_compare_name_union - Check whether a name matches "struct tomoyo_name_union" or not.
117 * @name: Pointer to "struct tomoyo_path_info".
118 * @ptr: Pointer to "struct tomoyo_name_union".
120 * Returns "struct tomoyo_path_info" if @name matches @ptr, NULL otherwise.
122 const struct tomoyo_path_info
*
123 tomoyo_compare_name_union(const struct tomoyo_path_info
*name
,
124 const struct tomoyo_name_union
*ptr
)
127 return tomoyo_path_matches_group(name
, ptr
->group
);
128 if (tomoyo_path_matches_pattern(name
, ptr
->filename
))
129 return ptr
->filename
;
134 * tomoyo_put_number_union - Drop reference on "struct tomoyo_number_union".
136 * @ptr: Pointer to "struct tomoyo_number_union".
140 void tomoyo_put_number_union(struct tomoyo_number_union
*ptr
)
142 tomoyo_put_group(ptr
->group
);
146 * tomoyo_compare_number_union - Check whether a value matches "struct tomoyo_number_union" or not.
148 * @value: Number to check.
149 * @ptr: Pointer to "struct tomoyo_number_union".
151 * Returns true if @value matches @ptr, false otherwise.
153 bool tomoyo_compare_number_union(const unsigned long value
,
154 const struct tomoyo_number_union
*ptr
)
157 return tomoyo_number_matches_group(value
, value
, ptr
->group
);
158 return value
>= ptr
->values
[0] && value
<= ptr
->values
[1];
162 * tomoyo_add_slash - Add trailing '/' if needed.
164 * @buf: Pointer to "struct tomoyo_path_info".
168 * @buf must be generated by tomoyo_encode() because this function does not
169 * allocate memory for adding '/'.
171 static void tomoyo_add_slash(struct tomoyo_path_info
*buf
)
176 * This is OK because tomoyo_encode() reserves space for appending "/".
178 strcat((char *) buf
->name
, "/");
179 tomoyo_fill_path_info(buf
);
183 * tomoyo_get_realpath - Get realpath.
185 * @buf: Pointer to "struct tomoyo_path_info".
186 * @path: Pointer to "struct path".
188 * Returns true on success, false otherwise.
190 static bool tomoyo_get_realpath(struct tomoyo_path_info
*buf
, struct path
*path
)
192 buf
->name
= tomoyo_realpath_from_path(path
);
194 tomoyo_fill_path_info(buf
);
201 * tomoyo_audit_path_log - Audit path request log.
203 * @r: Pointer to "struct tomoyo_request_info".
205 * Returns 0 on success, negative value otherwise.
207 static int tomoyo_audit_path_log(struct tomoyo_request_info
*r
)
209 const char *operation
= tomoyo_path_keyword
[r
->param
.path
.operation
];
210 const struct tomoyo_path_info
*filename
= r
->param
.path
.filename
;
213 tomoyo_warn_log(r
, "%s %s", operation
, filename
->name
);
214 return tomoyo_supervisor(r
, "file %s %s\n", operation
, filename
->name
);
218 * tomoyo_audit_path2_log - Audit path/path request log.
220 * @r: Pointer to "struct tomoyo_request_info".
222 * Returns 0 on success, negative value otherwise.
224 static int tomoyo_audit_path2_log(struct tomoyo_request_info
*r
)
226 const char *operation
= tomoyo_path2_keyword
[r
->param
.path2
.operation
];
227 const struct tomoyo_path_info
*filename1
= r
->param
.path2
.filename1
;
228 const struct tomoyo_path_info
*filename2
= r
->param
.path2
.filename2
;
231 tomoyo_warn_log(r
, "%s %s %s", operation
, filename1
->name
,
233 return tomoyo_supervisor(r
, "file %s %s %s\n", operation
,
234 filename1
->name
, filename2
->name
);
238 * tomoyo_audit_mkdev_log - Audit path/number/number/number request log.
240 * @r: Pointer to "struct tomoyo_request_info".
242 * Returns 0 on success, negative value otherwise.
244 static int tomoyo_audit_mkdev_log(struct tomoyo_request_info
*r
)
246 const char *operation
= tomoyo_mkdev_keyword
[r
->param
.mkdev
.operation
];
247 const struct tomoyo_path_info
*filename
= r
->param
.mkdev
.filename
;
248 const unsigned int major
= r
->param
.mkdev
.major
;
249 const unsigned int minor
= r
->param
.mkdev
.minor
;
250 const unsigned int mode
= r
->param
.mkdev
.mode
;
253 tomoyo_warn_log(r
, "%s %s 0%o %u %u", operation
, filename
->name
, mode
,
255 return tomoyo_supervisor(r
, "file %s %s 0%o %u %u\n", operation
,
256 filename
->name
, mode
, major
, minor
);
260 * tomoyo_audit_path_number_log - Audit path/number request log.
262 * @r: Pointer to "struct tomoyo_request_info".
264 * Returns 0 on success, negative value otherwise.
266 static int tomoyo_audit_path_number_log(struct tomoyo_request_info
*r
)
268 const u8 type
= r
->param
.path_number
.operation
;
270 const struct tomoyo_path_info
*filename
= r
->param
.path_number
.filename
;
271 const char *operation
= tomoyo_path_number_keyword
[type
];
276 case TOMOYO_TYPE_CREATE
:
277 case TOMOYO_TYPE_MKDIR
:
278 case TOMOYO_TYPE_MKFIFO
:
279 case TOMOYO_TYPE_MKSOCK
:
280 case TOMOYO_TYPE_CHMOD
:
281 radix
= TOMOYO_VALUE_TYPE_OCTAL
;
283 case TOMOYO_TYPE_IOCTL
:
284 radix
= TOMOYO_VALUE_TYPE_HEXADECIMAL
;
287 radix
= TOMOYO_VALUE_TYPE_DECIMAL
;
290 tomoyo_print_ulong(buffer
, sizeof(buffer
), r
->param
.path_number
.number
,
292 tomoyo_warn_log(r
, "%s %s %s", operation
, filename
->name
, buffer
);
293 return tomoyo_supervisor(r
, "file %s %s %s\n", operation
,
294 filename
->name
, buffer
);
298 * tomoyo_check_path_acl - Check permission for path operation.
300 * @r: Pointer to "struct tomoyo_request_info".
301 * @ptr: Pointer to "struct tomoyo_acl_info".
303 * Returns true if granted, false otherwise.
305 * To be able to use wildcard for domain transition, this function sets
306 * matching entry on success. Since the caller holds tomoyo_read_lock(),
307 * it is safe to set matching entry.
309 static bool tomoyo_check_path_acl(struct tomoyo_request_info
*r
,
310 const struct tomoyo_acl_info
*ptr
)
312 const struct tomoyo_path_acl
*acl
= container_of(ptr
, typeof(*acl
),
314 if (acl
->perm
& (1 << r
->param
.path
.operation
)) {
315 r
->param
.path
.matched_path
=
316 tomoyo_compare_name_union(r
->param
.path
.filename
,
318 return r
->param
.path
.matched_path
!= NULL
;
324 * tomoyo_check_path_number_acl - Check permission for path number operation.
326 * @r: Pointer to "struct tomoyo_request_info".
327 * @ptr: Pointer to "struct tomoyo_acl_info".
329 * Returns true if granted, false otherwise.
331 static bool tomoyo_check_path_number_acl(struct tomoyo_request_info
*r
,
332 const struct tomoyo_acl_info
*ptr
)
334 const struct tomoyo_path_number_acl
*acl
=
335 container_of(ptr
, typeof(*acl
), head
);
336 return (acl
->perm
& (1 << r
->param
.path_number
.operation
)) &&
337 tomoyo_compare_number_union(r
->param
.path_number
.number
,
339 tomoyo_compare_name_union(r
->param
.path_number
.filename
,
344 * tomoyo_check_path2_acl - Check permission for path path operation.
346 * @r: Pointer to "struct tomoyo_request_info".
347 * @ptr: Pointer to "struct tomoyo_acl_info".
349 * Returns true if granted, false otherwise.
351 static bool tomoyo_check_path2_acl(struct tomoyo_request_info
*r
,
352 const struct tomoyo_acl_info
*ptr
)
354 const struct tomoyo_path2_acl
*acl
=
355 container_of(ptr
, typeof(*acl
), head
);
356 return (acl
->perm
& (1 << r
->param
.path2
.operation
)) &&
357 tomoyo_compare_name_union(r
->param
.path2
.filename1
, &acl
->name1
)
358 && tomoyo_compare_name_union(r
->param
.path2
.filename2
,
363 * tomoyo_check_mkdev_acl - Check permission for path number number number operation.
365 * @r: Pointer to "struct tomoyo_request_info".
366 * @ptr: Pointer to "struct tomoyo_acl_info".
368 * Returns true if granted, false otherwise.
370 static bool tomoyo_check_mkdev_acl(struct tomoyo_request_info
*r
,
371 const struct tomoyo_acl_info
*ptr
)
373 const struct tomoyo_mkdev_acl
*acl
=
374 container_of(ptr
, typeof(*acl
), head
);
375 return (acl
->perm
& (1 << r
->param
.mkdev
.operation
)) &&
376 tomoyo_compare_number_union(r
->param
.mkdev
.mode
,
378 tomoyo_compare_number_union(r
->param
.mkdev
.major
,
380 tomoyo_compare_number_union(r
->param
.mkdev
.minor
,
382 tomoyo_compare_name_union(r
->param
.mkdev
.filename
,
387 * tomoyo_same_path_acl - Check for duplicated "struct tomoyo_path_acl" entry.
389 * @a: Pointer to "struct tomoyo_acl_info".
390 * @b: Pointer to "struct tomoyo_acl_info".
392 * Returns true if @a == @b except permission bits, false otherwise.
394 static bool tomoyo_same_path_acl(const struct tomoyo_acl_info
*a
,
395 const struct tomoyo_acl_info
*b
)
397 const struct tomoyo_path_acl
*p1
= container_of(a
, typeof(*p1
), head
);
398 const struct tomoyo_path_acl
*p2
= container_of(b
, typeof(*p2
), head
);
399 return tomoyo_same_name_union(&p1
->name
, &p2
->name
);
403 * tomoyo_merge_path_acl - Merge duplicated "struct tomoyo_path_acl" entry.
405 * @a: Pointer to "struct tomoyo_acl_info".
406 * @b: Pointer to "struct tomoyo_acl_info".
407 * @is_delete: True for @a &= ~@b, false for @a |= @b.
409 * Returns true if @a is empty, false otherwise.
411 static bool tomoyo_merge_path_acl(struct tomoyo_acl_info
*a
,
412 struct tomoyo_acl_info
*b
,
413 const bool is_delete
)
415 u16
* const a_perm
= &container_of(a
, struct tomoyo_path_acl
, head
)
418 const u16 b_perm
= container_of(b
, struct tomoyo_path_acl
, head
)->perm
;
428 * tomoyo_update_path_acl - Update "struct tomoyo_path_acl" list.
431 * @param: Pointer to "struct tomoyo_acl_param".
433 * Returns 0 on success, negative value otherwise.
435 * Caller holds tomoyo_read_lock().
437 static int tomoyo_update_path_acl(const u16 perm
,
438 struct tomoyo_acl_param
*param
)
440 struct tomoyo_path_acl e
= {
441 .head
.type
= TOMOYO_TYPE_PATH_ACL
,
445 if (!tomoyo_parse_name_union(param
, &e
.name
))
448 error
= tomoyo_update_domain(&e
.head
, sizeof(e
), param
,
449 tomoyo_same_path_acl
,
450 tomoyo_merge_path_acl
);
451 tomoyo_put_name_union(&e
.name
);
456 * tomoyo_same_mkdev_acl - Check for duplicated "struct tomoyo_mkdev_acl" entry.
458 * @a: Pointer to "struct tomoyo_acl_info".
459 * @b: Pointer to "struct tomoyo_acl_info".
461 * Returns true if @a == @b except permission bits, false otherwise.
463 static bool tomoyo_same_mkdev_acl(const struct tomoyo_acl_info
*a
,
464 const struct tomoyo_acl_info
*b
)
466 const struct tomoyo_mkdev_acl
*p1
= container_of(a
, typeof(*p1
), head
);
467 const struct tomoyo_mkdev_acl
*p2
= container_of(b
, typeof(*p2
), head
);
468 return tomoyo_same_name_union(&p1
->name
, &p2
->name
) &&
469 tomoyo_same_number_union(&p1
->mode
, &p2
->mode
) &&
470 tomoyo_same_number_union(&p1
->major
, &p2
->major
) &&
471 tomoyo_same_number_union(&p1
->minor
, &p2
->minor
);
475 * tomoyo_merge_mkdev_acl - Merge duplicated "struct tomoyo_mkdev_acl" entry.
477 * @a: Pointer to "struct tomoyo_acl_info".
478 * @b: Pointer to "struct tomoyo_acl_info".
479 * @is_delete: True for @a &= ~@b, false for @a |= @b.
481 * Returns true if @a is empty, false otherwise.
483 static bool tomoyo_merge_mkdev_acl(struct tomoyo_acl_info
*a
,
484 struct tomoyo_acl_info
*b
,
485 const bool is_delete
)
487 u8
*const a_perm
= &container_of(a
, struct tomoyo_mkdev_acl
,
490 const u8 b_perm
= container_of(b
, struct tomoyo_mkdev_acl
, head
)
501 * tomoyo_update_mkdev_acl - Update "struct tomoyo_mkdev_acl" list.
504 * @param: Pointer to "struct tomoyo_acl_param".
506 * Returns 0 on success, negative value otherwise.
508 * Caller holds tomoyo_read_lock().
510 static int tomoyo_update_mkdev_acl(const u8 perm
,
511 struct tomoyo_acl_param
*param
)
513 struct tomoyo_mkdev_acl e
= {
514 .head
.type
= TOMOYO_TYPE_MKDEV_ACL
,
518 if (!tomoyo_parse_name_union(param
, &e
.name
) ||
519 !tomoyo_parse_number_union(param
, &e
.mode
) ||
520 !tomoyo_parse_number_union(param
, &e
.major
) ||
521 !tomoyo_parse_number_union(param
, &e
.minor
))
524 error
= tomoyo_update_domain(&e
.head
, sizeof(e
), param
,
525 tomoyo_same_mkdev_acl
,
526 tomoyo_merge_mkdev_acl
);
527 tomoyo_put_name_union(&e
.name
);
528 tomoyo_put_number_union(&e
.mode
);
529 tomoyo_put_number_union(&e
.major
);
530 tomoyo_put_number_union(&e
.minor
);
535 * tomoyo_same_path2_acl - Check for duplicated "struct tomoyo_path2_acl" entry.
537 * @a: Pointer to "struct tomoyo_acl_info".
538 * @b: Pointer to "struct tomoyo_acl_info".
540 * Returns true if @a == @b except permission bits, false otherwise.
542 static bool tomoyo_same_path2_acl(const struct tomoyo_acl_info
*a
,
543 const struct tomoyo_acl_info
*b
)
545 const struct tomoyo_path2_acl
*p1
= container_of(a
, typeof(*p1
), head
);
546 const struct tomoyo_path2_acl
*p2
= container_of(b
, typeof(*p2
), head
);
547 return tomoyo_same_name_union(&p1
->name1
, &p2
->name1
) &&
548 tomoyo_same_name_union(&p1
->name2
, &p2
->name2
);
552 * tomoyo_merge_path2_acl - Merge duplicated "struct tomoyo_path2_acl" entry.
554 * @a: Pointer to "struct tomoyo_acl_info".
555 * @b: Pointer to "struct tomoyo_acl_info".
556 * @is_delete: True for @a &= ~@b, false for @a |= @b.
558 * Returns true if @a is empty, false otherwise.
560 static bool tomoyo_merge_path2_acl(struct tomoyo_acl_info
*a
,
561 struct tomoyo_acl_info
*b
,
562 const bool is_delete
)
564 u8
* const a_perm
= &container_of(a
, struct tomoyo_path2_acl
, head
)
567 const u8 b_perm
= container_of(b
, struct tomoyo_path2_acl
, head
)->perm
;
577 * tomoyo_update_path2_acl - Update "struct tomoyo_path2_acl" list.
580 * @param: Pointer to "struct tomoyo_acl_param".
582 * Returns 0 on success, negative value otherwise.
584 * Caller holds tomoyo_read_lock().
586 static int tomoyo_update_path2_acl(const u8 perm
,
587 struct tomoyo_acl_param
*param
)
589 struct tomoyo_path2_acl e
= {
590 .head
.type
= TOMOYO_TYPE_PATH2_ACL
,
594 if (!tomoyo_parse_name_union(param
, &e
.name1
) ||
595 !tomoyo_parse_name_union(param
, &e
.name2
))
598 error
= tomoyo_update_domain(&e
.head
, sizeof(e
), param
,
599 tomoyo_same_path2_acl
,
600 tomoyo_merge_path2_acl
);
601 tomoyo_put_name_union(&e
.name1
);
602 tomoyo_put_name_union(&e
.name2
);
607 * tomoyo_path_permission - Check permission for single path operation.
609 * @r: Pointer to "struct tomoyo_request_info".
610 * @operation: Type of operation.
611 * @filename: Filename to check.
613 * Returns 0 on success, negative value otherwise.
615 * Caller holds tomoyo_read_lock().
617 int tomoyo_path_permission(struct tomoyo_request_info
*r
, u8 operation
,
618 const struct tomoyo_path_info
*filename
)
622 r
->type
= tomoyo_p2mac
[operation
];
623 r
->mode
= tomoyo_get_mode(r
->profile
, r
->type
);
624 if (r
->mode
== TOMOYO_CONFIG_DISABLED
)
626 r
->param_type
= TOMOYO_TYPE_PATH_ACL
;
627 r
->param
.path
.filename
= filename
;
628 r
->param
.path
.operation
= operation
;
630 tomoyo_check_acl(r
, tomoyo_check_path_acl
);
631 error
= tomoyo_audit_path_log(r
);
633 * Do not retry for execute request, for alias may have
636 } while (error
== TOMOYO_RETRY_REQUEST
&&
637 operation
!= TOMOYO_TYPE_EXECUTE
);
642 * tomoyo_same_path_number_acl - Check for duplicated "struct tomoyo_path_number_acl" entry.
644 * @a: Pointer to "struct tomoyo_acl_info".
645 * @b: Pointer to "struct tomoyo_acl_info".
647 * Returns true if @a == @b except permission bits, false otherwise.
649 static bool tomoyo_same_path_number_acl(const struct tomoyo_acl_info
*a
,
650 const struct tomoyo_acl_info
*b
)
652 const struct tomoyo_path_number_acl
*p1
= container_of(a
, typeof(*p1
),
654 const struct tomoyo_path_number_acl
*p2
= container_of(b
, typeof(*p2
),
656 return tomoyo_same_name_union(&p1
->name
, &p2
->name
) &&
657 tomoyo_same_number_union(&p1
->number
, &p2
->number
);
661 * tomoyo_merge_path_number_acl - Merge duplicated "struct tomoyo_path_number_acl" entry.
663 * @a: Pointer to "struct tomoyo_acl_info".
664 * @b: Pointer to "struct tomoyo_acl_info".
665 * @is_delete: True for @a &= ~@b, false for @a |= @b.
667 * Returns true if @a is empty, false otherwise.
669 static bool tomoyo_merge_path_number_acl(struct tomoyo_acl_info
*a
,
670 struct tomoyo_acl_info
*b
,
671 const bool is_delete
)
673 u8
* const a_perm
= &container_of(a
, struct tomoyo_path_number_acl
,
676 const u8 b_perm
= container_of(b
, struct tomoyo_path_number_acl
, head
)
687 * tomoyo_update_path_number_acl - Update ioctl/chmod/chown/chgrp ACL.
690 * @param: Pointer to "struct tomoyo_acl_param".
692 * Returns 0 on success, negative value otherwise.
694 static int tomoyo_update_path_number_acl(const u8 perm
,
695 struct tomoyo_acl_param
*param
)
697 struct tomoyo_path_number_acl e
= {
698 .head
.type
= TOMOYO_TYPE_PATH_NUMBER_ACL
,
702 if (!tomoyo_parse_name_union(param
, &e
.name
) ||
703 !tomoyo_parse_number_union(param
, &e
.number
))
706 error
= tomoyo_update_domain(&e
.head
, sizeof(e
), param
,
707 tomoyo_same_path_number_acl
,
708 tomoyo_merge_path_number_acl
);
709 tomoyo_put_name_union(&e
.name
);
710 tomoyo_put_number_union(&e
.number
);
715 * tomoyo_path_number_perm - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp".
717 * @type: Type of operation.
718 * @path: Pointer to "struct path".
721 * Returns 0 on success, negative value otherwise.
723 int tomoyo_path_number_perm(const u8 type
, struct path
*path
,
724 unsigned long number
)
726 struct tomoyo_request_info r
;
728 struct tomoyo_path_info buf
;
731 if (tomoyo_init_request_info(&r
, NULL
, tomoyo_pn2mac
[type
])
732 == TOMOYO_CONFIG_DISABLED
|| !path
->mnt
|| !path
->dentry
)
734 idx
= tomoyo_read_lock();
735 if (!tomoyo_get_realpath(&buf
, path
))
737 if (type
== TOMOYO_TYPE_MKDIR
)
738 tomoyo_add_slash(&buf
);
739 r
.param_type
= TOMOYO_TYPE_PATH_NUMBER_ACL
;
740 r
.param
.path_number
.operation
= type
;
741 r
.param
.path_number
.filename
= &buf
;
742 r
.param
.path_number
.number
= number
;
744 tomoyo_check_acl(&r
, tomoyo_check_path_number_acl
);
745 error
= tomoyo_audit_path_number_log(&r
);
746 } while (error
== TOMOYO_RETRY_REQUEST
);
749 tomoyo_read_unlock(idx
);
750 if (r
.mode
!= TOMOYO_CONFIG_ENFORCING
)
756 * tomoyo_check_open_permission - Check permission for "read" and "write".
758 * @domain: Pointer to "struct tomoyo_domain_info".
759 * @path: Pointer to "struct path".
760 * @flag: Flags for open().
762 * Returns 0 on success, negative value otherwise.
764 int tomoyo_check_open_permission(struct tomoyo_domain_info
*domain
,
765 struct path
*path
, const int flag
)
767 const u8 acc_mode
= ACC_MODE(flag
);
769 struct tomoyo_path_info buf
;
770 struct tomoyo_request_info r
;
776 r
.mode
= TOMOYO_CONFIG_DISABLED
;
777 idx
= tomoyo_read_lock();
779 tomoyo_init_request_info(&r
, domain
, TOMOYO_MAC_FILE_OPEN
)
780 != TOMOYO_CONFIG_DISABLED
) {
781 if (!tomoyo_get_realpath(&buf
, path
)) {
785 if (acc_mode
& MAY_READ
)
786 error
= tomoyo_path_permission(&r
, TOMOYO_TYPE_READ
,
788 if (!error
&& (acc_mode
& MAY_WRITE
))
789 error
= tomoyo_path_permission(&r
, (flag
& O_APPEND
) ?
796 tomoyo_read_unlock(idx
);
797 if (r
.mode
!= TOMOYO_CONFIG_ENFORCING
)
803 * tomoyo_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "append", "chroot" and "unmount".
805 * @operation: Type of operation.
806 * @path: Pointer to "struct path".
808 * Returns 0 on success, negative value otherwise.
810 int tomoyo_path_perm(const u8 operation
, struct path
*path
)
812 struct tomoyo_request_info r
;
814 struct tomoyo_path_info buf
;
820 if (tomoyo_init_request_info(&r
, NULL
, tomoyo_p2mac
[operation
])
821 == TOMOYO_CONFIG_DISABLED
)
823 is_enforce
= (r
.mode
== TOMOYO_CONFIG_ENFORCING
);
826 idx
= tomoyo_read_lock();
827 if (!tomoyo_get_realpath(&buf
, path
))
830 case TOMOYO_TYPE_RMDIR
:
831 case TOMOYO_TYPE_CHROOT
:
832 tomoyo_add_slash(&buf
);
835 error
= tomoyo_path_permission(&r
, operation
, &buf
);
838 tomoyo_read_unlock(idx
);
845 * tomoyo_mkdev_perm - Check permission for "mkblock" and "mkchar".
847 * @operation: Type of operation. (TOMOYO_TYPE_MKCHAR or TOMOYO_TYPE_MKBLOCK)
848 * @path: Pointer to "struct path".
849 * @mode: Create mode.
850 * @dev: Device number.
852 * Returns 0 on success, negative value otherwise.
854 int tomoyo_mkdev_perm(const u8 operation
, struct path
*path
,
855 const unsigned int mode
, unsigned int dev
)
857 struct tomoyo_request_info r
;
859 struct tomoyo_path_info buf
;
863 tomoyo_init_request_info(&r
, NULL
, tomoyo_pnnn2mac
[operation
])
864 == TOMOYO_CONFIG_DISABLED
)
866 idx
= tomoyo_read_lock();
868 if (tomoyo_get_realpath(&buf
, path
)) {
869 dev
= new_decode_dev(dev
);
870 r
.param_type
= TOMOYO_TYPE_MKDEV_ACL
;
871 r
.param
.mkdev
.filename
= &buf
;
872 r
.param
.mkdev
.operation
= operation
;
873 r
.param
.mkdev
.mode
= mode
;
874 r
.param
.mkdev
.major
= MAJOR(dev
);
875 r
.param
.mkdev
.minor
= MINOR(dev
);
876 tomoyo_check_acl(&r
, tomoyo_check_mkdev_acl
);
877 error
= tomoyo_audit_mkdev_log(&r
);
880 tomoyo_read_unlock(idx
);
881 if (r
.mode
!= TOMOYO_CONFIG_ENFORCING
)
887 * tomoyo_path2_perm - Check permission for "rename", "link" and "pivot_root".
889 * @operation: Type of operation.
890 * @path1: Pointer to "struct path".
891 * @path2: Pointer to "struct path".
893 * Returns 0 on success, negative value otherwise.
895 int tomoyo_path2_perm(const u8 operation
, struct path
*path1
,
899 struct tomoyo_path_info buf1
;
900 struct tomoyo_path_info buf2
;
901 struct tomoyo_request_info r
;
904 if (!path1
->mnt
|| !path2
->mnt
||
905 tomoyo_init_request_info(&r
, NULL
, tomoyo_pp2mac
[operation
])
906 == TOMOYO_CONFIG_DISABLED
)
910 idx
= tomoyo_read_lock();
911 if (!tomoyo_get_realpath(&buf1
, path1
) ||
912 !tomoyo_get_realpath(&buf2
, path2
))
915 struct dentry
*dentry
;
916 case TOMOYO_TYPE_RENAME
:
917 case TOMOYO_TYPE_LINK
:
918 dentry
= path1
->dentry
;
919 if (!dentry
->d_inode
|| !S_ISDIR(dentry
->d_inode
->i_mode
))
922 case TOMOYO_TYPE_PIVOT_ROOT
:
923 tomoyo_add_slash(&buf1
);
924 tomoyo_add_slash(&buf2
);
927 r
.param_type
= TOMOYO_TYPE_PATH2_ACL
;
928 r
.param
.path2
.operation
= operation
;
929 r
.param
.path2
.filename1
= &buf1
;
930 r
.param
.path2
.filename2
= &buf2
;
932 tomoyo_check_acl(&r
, tomoyo_check_path2_acl
);
933 error
= tomoyo_audit_path2_log(&r
);
934 } while (error
== TOMOYO_RETRY_REQUEST
);
938 tomoyo_read_unlock(idx
);
939 if (r
.mode
!= TOMOYO_CONFIG_ENFORCING
)
945 * tomoyo_same_mount_acl - Check for duplicated "struct tomoyo_mount_acl" entry.
947 * @a: Pointer to "struct tomoyo_acl_info".
948 * @b: Pointer to "struct tomoyo_acl_info".
950 * Returns true if @a == @b, false otherwise.
952 static bool tomoyo_same_mount_acl(const struct tomoyo_acl_info
*a
,
953 const struct tomoyo_acl_info
*b
)
955 const struct tomoyo_mount_acl
*p1
= container_of(a
, typeof(*p1
), head
);
956 const struct tomoyo_mount_acl
*p2
= container_of(b
, typeof(*p2
), head
);
957 return tomoyo_same_name_union(&p1
->dev_name
, &p2
->dev_name
) &&
958 tomoyo_same_name_union(&p1
->dir_name
, &p2
->dir_name
) &&
959 tomoyo_same_name_union(&p1
->fs_type
, &p2
->fs_type
) &&
960 tomoyo_same_number_union(&p1
->flags
, &p2
->flags
);
964 * tomoyo_update_mount_acl - Write "struct tomoyo_mount_acl" list.
966 * @param: Pointer to "struct tomoyo_acl_param".
968 * Returns 0 on success, negative value otherwise.
970 * Caller holds tomoyo_read_lock().
972 static int tomoyo_update_mount_acl(struct tomoyo_acl_param
*param
)
974 struct tomoyo_mount_acl e
= { .head
.type
= TOMOYO_TYPE_MOUNT_ACL
};
976 if (!tomoyo_parse_name_union(param
, &e
.dev_name
) ||
977 !tomoyo_parse_name_union(param
, &e
.dir_name
) ||
978 !tomoyo_parse_name_union(param
, &e
.fs_type
) ||
979 !tomoyo_parse_number_union(param
, &e
.flags
))
982 error
= tomoyo_update_domain(&e
.head
, sizeof(e
), param
,
983 tomoyo_same_mount_acl
, NULL
);
984 tomoyo_put_name_union(&e
.dev_name
);
985 tomoyo_put_name_union(&e
.dir_name
);
986 tomoyo_put_name_union(&e
.fs_type
);
987 tomoyo_put_number_union(&e
.flags
);
992 * tomoyo_write_file - Update file related list.
994 * @param: Pointer to "struct tomoyo_acl_param".
996 * Returns 0 on success, negative value otherwise.
998 * Caller holds tomoyo_read_lock().
1000 int tomoyo_write_file(struct tomoyo_acl_param
*param
)
1004 const char *operation
= tomoyo_read_token(param
);
1005 for (type
= 0; type
< TOMOYO_MAX_PATH_OPERATION
; type
++)
1006 if (tomoyo_permstr(operation
, tomoyo_path_keyword
[type
]))
1009 return tomoyo_update_path_acl(perm
, param
);
1010 for (type
= 0; type
< TOMOYO_MAX_PATH2_OPERATION
; type
++)
1011 if (tomoyo_permstr(operation
, tomoyo_path2_keyword
[type
]))
1014 return tomoyo_update_path2_acl(perm
, param
);
1015 for (type
= 0; type
< TOMOYO_MAX_PATH_NUMBER_OPERATION
; type
++)
1016 if (tomoyo_permstr(operation
,
1017 tomoyo_path_number_keyword
[type
]))
1020 return tomoyo_update_path_number_acl(perm
, param
);
1021 for (type
= 0; type
< TOMOYO_MAX_MKDEV_OPERATION
; type
++)
1022 if (tomoyo_permstr(operation
, tomoyo_mkdev_keyword
[type
]))
1025 return tomoyo_update_mkdev_acl(perm
, param
);
1026 if (tomoyo_permstr(operation
, "mount"))
1027 return tomoyo_update_mount_acl(param
);