1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * security/tomoyo/common.h
4 *
5 * Header file for TOMOYO.
6 *
7 * Copyright (C) 2005-2011 NTT DATA CORPORATION
8 */
9
10 #ifndef _SECURITY_TOMOYO_COMMON_H
11 #define _SECURITY_TOMOYO_COMMON_H
12
13 #include <linux/ctype.h>
14 #include <linux/string.h>
15 #include <linux/mm.h>
16 #include <linux/file.h>
17 #include <linux/kmod.h>
18 #include <linux/fs.h>
19 #include <linux/sched.h>
20 #include <linux/namei.h>
21 #include <linux/mount.h>
22 #include <linux/list.h>
23 #include <linux/cred.h>
24 #include <linux/poll.h>
25 #include <linux/binfmts.h>
26 #include <linux/highmem.h>
27 #include <linux/net.h>
28 #include <linux/inet.h>
29 #include <linux/in.h>
30 #include <linux/in6.h>
31 #include <linux/un.h>
32 #include <net/sock.h>
33 #include <net/af_unix.h>
34 #include <net/ip.h>
35 #include <net/ipv6.h>
36 #include <net/udp.h>
37
38 /********** Constants definitions. **********/
39
40 /*
41 * TOMOYO uses this hash only when appending a string into the string
42 * table. Frequency of appending strings is very low. So we don't need
43 * large (e.g. 64k) hash size. 256 will be sufficient.
44 */
45 #define TOMOYO_HASH_BITS 8
46 #define TOMOYO_MAX_HASH (1u<<TOMOYO_HASH_BITS)
47
48 /*
49 * TOMOYO checks only SOCK_STREAM, SOCK_DGRAM, SOCK_RAW, SOCK_SEQPACKET.
50 * Therefore, we don't need SOCK_MAX.
51 */
52 #define TOMOYO_SOCK_MAX 6
53
54 #define TOMOYO_EXEC_TMPSIZE 4096
55
56 /* Garbage collector is trying to kfree() this element. */
57 #define TOMOYO_GC_IN_PROGRESS -1
58
59 /* Profile number is an integer between 0 and 255. */
60 #define TOMOYO_MAX_PROFILES 256
61
62 /* Group number is an integer between 0 and 255. */
63 #define TOMOYO_MAX_ACL_GROUPS 256
64
65 /* Index numbers for "struct tomoyo_condition". */
66 enum tomoyo_conditions_index {
67 TOMOYO_TASK_UID, /* current_uid() */
68 TOMOYO_TASK_EUID, /* current_euid() */
69 TOMOYO_TASK_SUID, /* current_suid() */
70 TOMOYO_TASK_FSUID, /* current_fsuid() */
71 TOMOYO_TASK_GID, /* current_gid() */
72 TOMOYO_TASK_EGID, /* current_egid() */
73 TOMOYO_TASK_SGID, /* current_sgid() */
74 TOMOYO_TASK_FSGID, /* current_fsgid() */
75 TOMOYO_TASK_PID, /* sys_getpid() */
76 TOMOYO_TASK_PPID, /* sys_getppid() */
77 TOMOYO_EXEC_ARGC, /* "struct linux_binprm *"->argc */
78 TOMOYO_EXEC_ENVC, /* "struct linux_binprm *"->envc */
79 TOMOYO_TYPE_IS_SOCKET, /* S_IFSOCK */
80 TOMOYO_TYPE_IS_SYMLINK, /* S_IFLNK */
81 TOMOYO_TYPE_IS_FILE, /* S_IFREG */
82 TOMOYO_TYPE_IS_BLOCK_DEV, /* S_IFBLK */
83 TOMOYO_TYPE_IS_DIRECTORY, /* S_IFDIR */
84 TOMOYO_TYPE_IS_CHAR_DEV, /* S_IFCHR */
85 TOMOYO_TYPE_IS_FIFO, /* S_IFIFO */
86 TOMOYO_MODE_SETUID, /* S_ISUID */
87 TOMOYO_MODE_SETGID, /* S_ISGID */
88 TOMOYO_MODE_STICKY, /* S_ISVTX */
89 TOMOYO_MODE_OWNER_READ, /* S_IRUSR */
90 TOMOYO_MODE_OWNER_WRITE, /* S_IWUSR */
91 TOMOYO_MODE_OWNER_EXECUTE, /* S_IXUSR */
92 TOMOYO_MODE_GROUP_READ, /* S_IRGRP */
93 TOMOYO_MODE_GROUP_WRITE, /* S_IWGRP */
94 TOMOYO_MODE_GROUP_EXECUTE, /* S_IXGRP */
95 TOMOYO_MODE_OTHERS_READ, /* S_IROTH */
96 TOMOYO_MODE_OTHERS_WRITE, /* S_IWOTH */
97 TOMOYO_MODE_OTHERS_EXECUTE, /* S_IXOTH */
98 TOMOYO_EXEC_REALPATH,
99 TOMOYO_SYMLINK_TARGET,
100 TOMOYO_PATH1_UID,
101 TOMOYO_PATH1_GID,
102 TOMOYO_PATH1_INO,
103 TOMOYO_PATH1_MAJOR,
104 TOMOYO_PATH1_MINOR,
105 TOMOYO_PATH1_PERM,
106 TOMOYO_PATH1_TYPE,
107 TOMOYO_PATH1_DEV_MAJOR,
108 TOMOYO_PATH1_DEV_MINOR,
109 TOMOYO_PATH2_UID,
110 TOMOYO_PATH2_GID,
111 TOMOYO_PATH2_INO,
112 TOMOYO_PATH2_MAJOR,
113 TOMOYO_PATH2_MINOR,
114 TOMOYO_PATH2_PERM,
115 TOMOYO_PATH2_TYPE,
116 TOMOYO_PATH2_DEV_MAJOR,
117 TOMOYO_PATH2_DEV_MINOR,
118 TOMOYO_PATH1_PARENT_UID,
119 TOMOYO_PATH1_PARENT_GID,
120 TOMOYO_PATH1_PARENT_INO,
121 TOMOYO_PATH1_PARENT_PERM,
122 TOMOYO_PATH2_PARENT_UID,
123 TOMOYO_PATH2_PARENT_GID,
124 TOMOYO_PATH2_PARENT_INO,
125 TOMOYO_PATH2_PARENT_PERM,
126 TOMOYO_MAX_CONDITION_KEYWORD,
127 TOMOYO_NUMBER_UNION,
128 TOMOYO_NAME_UNION,
129 TOMOYO_ARGV_ENTRY,
130 TOMOYO_ENVP_ENTRY,
131 };
132
133
134 /* Index numbers for stat(). */
135 enum tomoyo_path_stat_index {
136 /* Do not change this order. */
137 TOMOYO_PATH1,
138 TOMOYO_PATH1_PARENT,
139 TOMOYO_PATH2,
140 TOMOYO_PATH2_PARENT,
141 TOMOYO_MAX_PATH_STAT
142 };
143
144 /* Index numbers for operation mode. */
145 enum tomoyo_mode_index {
146 TOMOYO_CONFIG_DISABLED,
147 TOMOYO_CONFIG_LEARNING,
148 TOMOYO_CONFIG_PERMISSIVE,
149 TOMOYO_CONFIG_ENFORCING,
150 TOMOYO_CONFIG_MAX_MODE,
151 TOMOYO_CONFIG_WANT_REJECT_LOG = 64,
152 TOMOYO_CONFIG_WANT_GRANT_LOG = 128,
153 TOMOYO_CONFIG_USE_DEFAULT = 255,
154 };
155
156 /* Index numbers for entry type. */
157 enum tomoyo_policy_id {
158 TOMOYO_ID_GROUP,
159 TOMOYO_ID_ADDRESS_GROUP,
160 TOMOYO_ID_PATH_GROUP,
161 TOMOYO_ID_NUMBER_GROUP,
162 TOMOYO_ID_TRANSITION_CONTROL,
163 TOMOYO_ID_AGGREGATOR,
164 TOMOYO_ID_MANAGER,
165 TOMOYO_ID_CONDITION,
166 TOMOYO_ID_NAME,
167 TOMOYO_ID_ACL,
168 TOMOYO_ID_DOMAIN,
169 TOMOYO_MAX_POLICY
170 };
171
172 /* Index numbers for domain's attributes. */
173 enum tomoyo_domain_info_flags_index {
174 /* Quota warnning flag. */
175 TOMOYO_DIF_QUOTA_WARNED,
176 /*
177 * This domain was unable to create a new domain at
178 * tomoyo_find_next_domain() because the name of the domain to be
179 * created was too long or it could not allocate memory.
180 * More than one process continued execve() without domain transition.
181 */
182 TOMOYO_DIF_TRANSITION_FAILED,
183 TOMOYO_MAX_DOMAIN_INFO_FLAGS
184 };
185
186 /* Index numbers for audit type. */
187 enum tomoyo_grant_log {
188 /* Follow profile's configuration. */
189 TOMOYO_GRANTLOG_AUTO,
190 /* Do not generate grant log. */
191 TOMOYO_GRANTLOG_NO,
192 /* Generate grant_log. */
193 TOMOYO_GRANTLOG_YES,
194 };
195
196 /* Index numbers for group entries. */
197 enum tomoyo_group_id {
198 TOMOYO_PATH_GROUP,
199 TOMOYO_NUMBER_GROUP,
200 TOMOYO_ADDRESS_GROUP,
201 TOMOYO_MAX_GROUP
202 };
203
204 /* Index numbers for type of numeric values. */
205 enum tomoyo_value_type {
206 TOMOYO_VALUE_TYPE_INVALID,
207 TOMOYO_VALUE_TYPE_DECIMAL,
208 TOMOYO_VALUE_TYPE_OCTAL,
209 TOMOYO_VALUE_TYPE_HEXADECIMAL,
210 };
211
212 /* Index numbers for domain transition control keywords. */
213 enum tomoyo_transition_type {
214 /* Do not change this order, */
215 TOMOYO_TRANSITION_CONTROL_NO_RESET,
216 TOMOYO_TRANSITION_CONTROL_RESET,
217 TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE,
218 TOMOYO_TRANSITION_CONTROL_INITIALIZE,
219 TOMOYO_TRANSITION_CONTROL_NO_KEEP,
220 TOMOYO_TRANSITION_CONTROL_KEEP,
221 TOMOYO_MAX_TRANSITION_TYPE
222 };
223
224 /* Index numbers for Access Controls. */
225 enum tomoyo_acl_entry_type_index {
226 TOMOYO_TYPE_PATH_ACL,
227 TOMOYO_TYPE_PATH2_ACL,
228 TOMOYO_TYPE_PATH_NUMBER_ACL,
229 TOMOYO_TYPE_MKDEV_ACL,
230 TOMOYO_TYPE_MOUNT_ACL,
231 TOMOYO_TYPE_INET_ACL,
232 TOMOYO_TYPE_UNIX_ACL,
233 TOMOYO_TYPE_ENV_ACL,
234 TOMOYO_TYPE_MANUAL_TASK_ACL,
235 };
236
237 /* Index numbers for access controls with one pathname. */
238 enum tomoyo_path_acl_index {
239 TOMOYO_TYPE_EXECUTE,
240 TOMOYO_TYPE_READ,
241 TOMOYO_TYPE_WRITE,
242 TOMOYO_TYPE_APPEND,
243 TOMOYO_TYPE_UNLINK,
244 TOMOYO_TYPE_GETATTR,
245 TOMOYO_TYPE_RMDIR,
246 TOMOYO_TYPE_TRUNCATE,
247 TOMOYO_TYPE_SYMLINK,
248 TOMOYO_TYPE_CHROOT,
249 TOMOYO_TYPE_UMOUNT,
250 TOMOYO_MAX_PATH_OPERATION
251 };
252
253 /* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
254 enum tomoyo_memory_stat_type {
255 TOMOYO_MEMORY_POLICY,
256 TOMOYO_MEMORY_AUDIT,
257 TOMOYO_MEMORY_QUERY,
258 TOMOYO_MAX_MEMORY_STAT
259 };
260
261 enum tomoyo_mkdev_acl_index {
262 TOMOYO_TYPE_MKBLOCK,
263 TOMOYO_TYPE_MKCHAR,
264 TOMOYO_MAX_MKDEV_OPERATION
265 };
266
267 /* Index numbers for socket operations. */
268 enum tomoyo_network_acl_index {
269 TOMOYO_NETWORK_BIND, /* bind() operation. */
270 TOMOYO_NETWORK_LISTEN, /* listen() operation. */
271 TOMOYO_NETWORK_CONNECT, /* connect() operation. */
272 TOMOYO_NETWORK_SEND, /* send() operation. */
273 TOMOYO_MAX_NETWORK_OPERATION
274 };
275
276 /* Index numbers for access controls with two pathnames. */
277 enum tomoyo_path2_acl_index {
278 TOMOYO_TYPE_LINK,
279 TOMOYO_TYPE_RENAME,
280 TOMOYO_TYPE_PIVOT_ROOT,
281 TOMOYO_MAX_PATH2_OPERATION
282 };
283
284 /* Index numbers for access controls with one pathname and one number. */
285 enum tomoyo_path_number_acl_index {
286 TOMOYO_TYPE_CREATE,
287 TOMOYO_TYPE_MKDIR,
288 TOMOYO_TYPE_MKFIFO,
289 TOMOYO_TYPE_MKSOCK,
290 TOMOYO_TYPE_IOCTL,
291 TOMOYO_TYPE_CHMOD,
292 TOMOYO_TYPE_CHOWN,
293 TOMOYO_TYPE_CHGRP,
294 TOMOYO_MAX_PATH_NUMBER_OPERATION
295 };
296
297 /* Index numbers for /sys/kernel/security/tomoyo/ interfaces. */
298 enum tomoyo_securityfs_interface_index {
299 TOMOYO_DOMAINPOLICY,
300 TOMOYO_EXCEPTIONPOLICY,
301 TOMOYO_PROCESS_STATUS,
302 TOMOYO_STAT,
303 TOMOYO_AUDIT,
304 TOMOYO_VERSION,
305 TOMOYO_PROFILE,
306 TOMOYO_QUERY,
307 TOMOYO_MANAGER
308 };
309
310 /* Index numbers for special mount operations. */
311 enum tomoyo_special_mount {
312 TOMOYO_MOUNT_BIND, /* mount --bind /source /dest */
313 TOMOYO_MOUNT_MOVE, /* mount --move /old /new */
314 TOMOYO_MOUNT_REMOUNT, /* mount -o remount /dir */
315 TOMOYO_MOUNT_MAKE_UNBINDABLE, /* mount --make-unbindable /dir */
316 TOMOYO_MOUNT_MAKE_PRIVATE, /* mount --make-private /dir */
317 TOMOYO_MOUNT_MAKE_SLAVE, /* mount --make-slave /dir */
318 TOMOYO_MOUNT_MAKE_SHARED, /* mount --make-shared /dir */
319 TOMOYO_MAX_SPECIAL_MOUNT
320 };
321
322 /* Index numbers for functionality. */
323 enum tomoyo_mac_index {
324 TOMOYO_MAC_FILE_EXECUTE,
325 TOMOYO_MAC_FILE_OPEN,
326 TOMOYO_MAC_FILE_CREATE,
327 TOMOYO_MAC_FILE_UNLINK,
328 TOMOYO_MAC_FILE_GETATTR,
329 TOMOYO_MAC_FILE_MKDIR,
330 TOMOYO_MAC_FILE_RMDIR,
331 TOMOYO_MAC_FILE_MKFIFO,
332 TOMOYO_MAC_FILE_MKSOCK,
333 TOMOYO_MAC_FILE_TRUNCATE,
334 TOMOYO_MAC_FILE_SYMLINK,
335 TOMOYO_MAC_FILE_MKBLOCK,
336 TOMOYO_MAC_FILE_MKCHAR,
337 TOMOYO_MAC_FILE_LINK,
338 TOMOYO_MAC_FILE_RENAME,
339 TOMOYO_MAC_FILE_CHMOD,
340 TOMOYO_MAC_FILE_CHOWN,
341 TOMOYO_MAC_FILE_CHGRP,
342 TOMOYO_MAC_FILE_IOCTL,
343 TOMOYO_MAC_FILE_CHROOT,
344 TOMOYO_MAC_FILE_MOUNT,
345 TOMOYO_MAC_FILE_UMOUNT,
346 TOMOYO_MAC_FILE_PIVOT_ROOT,
347 TOMOYO_MAC_NETWORK_INET_STREAM_BIND,
348 TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN,
349 TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT,
350 TOMOYO_MAC_NETWORK_INET_DGRAM_BIND,
351 TOMOYO_MAC_NETWORK_INET_DGRAM_SEND,
352 TOMOYO_MAC_NETWORK_INET_RAW_BIND,
353 TOMOYO_MAC_NETWORK_INET_RAW_SEND,
354 TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND,
355 TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN,
356 TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT,
357 TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND,
358 TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND,
359 TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND,
360 TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN,
361 TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT,
362 TOMOYO_MAC_ENVIRON,
363 TOMOYO_MAX_MAC_INDEX
364 };
365
366 /* Index numbers for category of functionality. */
367 enum tomoyo_mac_category_index {
368 TOMOYO_MAC_CATEGORY_FILE,
369 TOMOYO_MAC_CATEGORY_NETWORK,
370 TOMOYO_MAC_CATEGORY_MISC,
371 TOMOYO_MAX_MAC_CATEGORY_INDEX
372 };
373
374 /*
375 * Retry this request. Returned by tomoyo_supervisor() if policy violation has
376 * occurred in enforcing mode and the userspace daemon decided to retry.
377 *
378 * We must choose a positive value in order to distinguish "granted" (which is
379 * 0) and "rejected" (which is a negative value) and "retry".
380 */
381 #define TOMOYO_RETRY_REQUEST 1
382
383 /* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
384 enum tomoyo_policy_stat_type {
385 /* Do not change this order. */
386 TOMOYO_STAT_POLICY_UPDATES,
387 TOMOYO_STAT_POLICY_LEARNING, /* == TOMOYO_CONFIG_LEARNING */
388 TOMOYO_STAT_POLICY_PERMISSIVE, /* == TOMOYO_CONFIG_PERMISSIVE */
389 TOMOYO_STAT_POLICY_ENFORCING, /* == TOMOYO_CONFIG_ENFORCING */
390 TOMOYO_MAX_POLICY_STAT
391 };
392
393 /* Index numbers for profile's PREFERENCE values. */
394 enum tomoyo_pref_index {
395 TOMOYO_PREF_MAX_AUDIT_LOG,
396 TOMOYO_PREF_MAX_LEARNING_ENTRY,
397 TOMOYO_MAX_PREF
398 };
399
400 /********** Structure definitions. **********/
401
402 /* Common header for holding ACL entries. */
403 struct tomoyo_acl_head {
404 struct list_head list;
405 s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
406 } __packed;
407
408 /* Common header for shared entries. */
409 struct tomoyo_shared_acl_head {
410 struct list_head list;
411 atomic_t users;
412 } __packed;
413
414 struct tomoyo_policy_namespace;
415
416 /* Structure for request info. */
417 struct tomoyo_request_info {
418 /*
419 * For holding parameters specific to operations which deal files.
420 * NULL if not dealing files.
421 */
422 struct tomoyo_obj_info *obj;
423 /*
424 * For holding parameters specific to execve() request.
425 * NULL if not dealing do_execve().
426 */
427 struct tomoyo_execve *ee;
428 struct tomoyo_domain_info *domain;
429 /* For holding parameters. */
430 union {
431 struct {
432 const struct tomoyo_path_info *filename;
433 /* For using wildcards at tomoyo_find_next_domain(). */
434 const struct tomoyo_path_info *matched_path;
435 /* One of values in "enum tomoyo_path_acl_index". */
436 u8 operation;
437 } path;
438 struct {
439 const struct tomoyo_path_info *filename1;
440 const struct tomoyo_path_info *filename2;
441 /* One of values in "enum tomoyo_path2_acl_index". */
442 u8 operation;
443 } path2;
444 struct {
445 const struct tomoyo_path_info *filename;
446 unsigned int mode;
447 unsigned int major;
448 unsigned int minor;
449 /* One of values in "enum tomoyo_mkdev_acl_index". */
450 u8 operation;
451 } mkdev;
452 struct {
453 const struct tomoyo_path_info *filename;
454 unsigned long number;
455 /*
456 * One of values in
457 * "enum tomoyo_path_number_acl_index".
458 */
459 u8 operation;
460 } path_number;
461 struct {
462 const struct tomoyo_path_info *name;
463 } environ;
464 struct {
465 const __be32 *address;
466 u16 port;
467 /* One of values smaller than TOMOYO_SOCK_MAX. */
468 u8 protocol;
469 /* One of values in "enum tomoyo_network_acl_index". */
470 u8 operation;
471 bool is_ipv6;
472 } inet_network;
473 struct {
474 const struct tomoyo_path_info *address;
475 /* One of values smaller than TOMOYO_SOCK_MAX. */
476 u8 protocol;
477 /* One of values in "enum tomoyo_network_acl_index". */
478 u8 operation;
479 } unix_network;
480 struct {
481 const struct tomoyo_path_info *type;
482 const struct tomoyo_path_info *dir;
483 const struct tomoyo_path_info *dev;
484 unsigned long flags;
485 int need_dev;
486 } mount;
487 struct {
488 const struct tomoyo_path_info *domainname;
489 } task;
490 } param;
491 struct tomoyo_acl_info *matched_acl;
492 u8 param_type;
493 bool granted;
494 u8 retry;
495 u8 profile;
496 u8 mode; /* One of tomoyo_mode_index . */
497 u8 type;
498 };
499
500 /* Structure for holding a token. */
501 struct tomoyo_path_info {
502 const char *name;
503 u32 hash; /* = full_name_hash(name, strlen(name)) */
504 u16 const_len; /* = tomoyo_const_part_length(name) */
505 bool is_dir; /* = tomoyo_strendswith(name, "/") */
506 bool is_patterned; /* = tomoyo_path_contains_pattern(name) */
507 };
508
509 /* Structure for holding string data. */
510 struct tomoyo_name {
511 struct tomoyo_shared_acl_head head;
512 struct tomoyo_path_info entry;
513 };
514
515 /* Structure for holding a word. */
516 struct tomoyo_name_union {
517 /* Either @filename or @group is NULL. */
518 const struct tomoyo_path_info *filename;
519 struct tomoyo_group *group;
520 };
521
522 /* Structure for holding a number. */
523 struct tomoyo_number_union {
524 unsigned long values[2];
525 struct tomoyo_group *group; /* Maybe NULL. */
526 /* One of values in "enum tomoyo_value_type". */
527 u8 value_type[2];
528 };
529
530 /* Structure for holding an IP address. */
531 struct tomoyo_ipaddr_union {
532 struct in6_addr ip[2]; /* Big endian. */
533 struct tomoyo_group *group; /* Pointer to address group. */
534 bool is_ipv6; /* Valid only if @group == NULL. */
535 };
536
537 /* Structure for "path_group"/"number_group"/"address_group" directive. */
538 struct tomoyo_group {
539 struct tomoyo_shared_acl_head head;
540 const struct tomoyo_path_info *group_name;
541 struct list_head member_list;
542 };
543
544 /* Structure for "path_group" directive. */
545 struct tomoyo_path_group {
546 struct tomoyo_acl_head head;
547 const struct tomoyo_path_info *member_name;
548 };
549
550 /* Structure for "number_group" directive. */
551 struct tomoyo_number_group {
552 struct tomoyo_acl_head head;
553 struct tomoyo_number_union number;
554 };
555
556 /* Structure for "address_group" directive. */
557 struct tomoyo_address_group {
558 struct tomoyo_acl_head head;
559 /* Structure for holding an IP address. */
560 struct tomoyo_ipaddr_union address;
561 };
562
563 /* Subset of "struct stat". Used by conditional ACL and audit logs. */
564 struct tomoyo_mini_stat {
565 kuid_t uid;
566 kgid_t gid;
567 ino_t ino;
568 umode_t mode;
569 dev_t dev;
570 dev_t rdev;
571 };
572
573 /* Structure for dumping argv[] and envp[] of "struct linux_binprm". */
574 struct tomoyo_page_dump {
575 struct page *page; /* Previously dumped page. */
576 char *data; /* Contents of "page". Size is PAGE_SIZE. */
577 };
578
579 /* Structure for attribute checks in addition to pathname checks. */
580 struct tomoyo_obj_info {
581 /*
582 * True if tomoyo_get_attributes() was already called, false otherwise.
583 */
584 bool validate_done;
585 /* True if @stat[] is valid. */
586 bool stat_valid[TOMOYO_MAX_PATH_STAT];
587 /* First pathname. Initialized with { NULL, NULL } if no path. */
588 struct path path1;
589 /* Second pathname. Initialized with { NULL, NULL } if no path. */
590 struct path path2;
591 /*
592 * Information on @path1, @path1's parent directory, @path2, @path2's
593 * parent directory.
594 */
595 struct tomoyo_mini_stat stat[TOMOYO_MAX_PATH_STAT];
596 /*
597 * Content of symbolic link to be created. NULL for operations other
598 * than symlink().
599 */
600 struct tomoyo_path_info *symlink_target;
601 };
602
603 /* Structure for argv[]. */
604 struct tomoyo_argv {
605 unsigned long index;
606 const struct tomoyo_path_info *value;
607 bool is_not;
608 };
609
610 /* Structure for envp[]. */
611 struct tomoyo_envp {
612 const struct tomoyo_path_info *name;
613 const struct tomoyo_path_info *value;
614 bool is_not;
615 };
616
617 /* Structure for execve() operation. */
618 struct tomoyo_execve {
619 struct tomoyo_request_info r;
620 struct tomoyo_obj_info obj;
621 struct linux_binprm *bprm;
622 const struct tomoyo_path_info *transition;
623 /* For dumping argv[] and envp[]. */
624 struct tomoyo_page_dump dump;
625 /* For temporary use. */
626 char *tmp; /* Size is TOMOYO_EXEC_TMPSIZE bytes */
627 };
628
629 /* Structure for entries which follows "struct tomoyo_condition". */
630 struct tomoyo_condition_element {
631 /*
632 * Left hand operand. A "struct tomoyo_argv" for TOMOYO_ARGV_ENTRY, a
633 * "struct tomoyo_envp" for TOMOYO_ENVP_ENTRY is attached to the tail
634 * of the array of this struct.
635 */
636 u8 left;
637 /*
638 * Right hand operand. A "struct tomoyo_number_union" for
639 * TOMOYO_NUMBER_UNION, a "struct tomoyo_name_union" for
640 * TOMOYO_NAME_UNION is attached to the tail of the array of this
641 * struct.
642 */
643 u8 right;
644 /* Equation operator. True if equals or overlaps, false otherwise. */
645 bool equals;
646 };
647
648 /* Structure for optional arguments. */
649 struct tomoyo_condition {
650 struct tomoyo_shared_acl_head head;
651 u32 size; /* Memory size allocated for this entry. */
652 u16 condc; /* Number of conditions in this struct. */
653 u16 numbers_count; /* Number of "struct tomoyo_number_union values". */
654 u16 names_count; /* Number of "struct tomoyo_name_union names". */
655 u16 argc; /* Number of "struct tomoyo_argv". */
656 u16 envc; /* Number of "struct tomoyo_envp". */
657 u8 grant_log; /* One of values in "enum tomoyo_grant_log". */
658 const struct tomoyo_path_info *transit; /* Maybe NULL. */
659 /*
660 * struct tomoyo_condition_element condition[condc];
661 * struct tomoyo_number_union values[numbers_count];
662 * struct tomoyo_name_union names[names_count];
663 * struct tomoyo_argv argv[argc];
664 * struct tomoyo_envp envp[envc];
665 */
666 };
667
668 /* Common header for individual entries. */
669 struct tomoyo_acl_info {
670 struct list_head list;
671 struct tomoyo_condition *cond; /* Maybe NULL. */
672 s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
673 u8 type; /* One of values in "enum tomoyo_acl_entry_type_index". */
674 } __packed;
675
676 /* Structure for domain information. */
677 struct tomoyo_domain_info {
678 struct list_head list;
679 struct list_head acl_info_list;
680 /* Name of this domain. Never NULL. */
681 const struct tomoyo_path_info *domainname;
682 /* Namespace for this domain. Never NULL. */
683 struct tomoyo_policy_namespace *ns;
684 u8 profile; /* Profile number to use. */
685 u8 group; /* Group number to use. */
686 bool is_deleted; /* Delete flag. */
687 bool flags[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
688 atomic_t users; /* Number of referring credentials. */
689 };
690
691 /*
692 * Structure for "task manual_domain_transition" directive.
693 */
694 struct tomoyo_task_acl {
695 struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MANUAL_TASK_ACL */
696 /* Pointer to domainname. */
697 const struct tomoyo_path_info *domainname;
698 };
699
700 /*
701 * Structure for "file execute", "file read", "file write", "file append",
702 * "file unlink", "file getattr", "file rmdir", "file truncate",
703 * "file symlink", "file chroot" and "file unmount" directive.
704 */
705 struct tomoyo_path_acl {
706 struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */
707 u16 perm; /* Bitmask of values in "enum tomoyo_path_acl_index". */
708 struct tomoyo_name_union name;
709 };
710
711 /*
712 * Structure for "file create", "file mkdir", "file mkfifo", "file mksock",
713 * "file ioctl", "file chmod", "file chown" and "file chgrp" directive.
714 */
715 struct tomoyo_path_number_acl {
716 struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_NUMBER_ACL */
717 /* Bitmask of values in "enum tomoyo_path_number_acl_index". */
718 u8 perm;
719 struct tomoyo_name_union name;
720 struct tomoyo_number_union number;
721 };
722
723 /* Structure for "file mkblock" and "file mkchar" directive. */
724 struct tomoyo_mkdev_acl {
725 struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MKDEV_ACL */
726 u8 perm; /* Bitmask of values in "enum tomoyo_mkdev_acl_index". */
727 struct tomoyo_name_union name;
728 struct tomoyo_number_union mode;
729 struct tomoyo_number_union major;
730 struct tomoyo_number_union minor;
731 };
732
733 /*
734 * Structure for "file rename", "file link" and "file pivot_root" directive.
735 */
736 struct tomoyo_path2_acl {
737 struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */
738 u8 perm; /* Bitmask of values in "enum tomoyo_path2_acl_index". */
739 struct tomoyo_name_union name1;
740 struct tomoyo_name_union name2;
741 };
742
743 /* Structure for "file mount" directive. */
744 struct tomoyo_mount_acl {
745 struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MOUNT_ACL */
746 struct tomoyo_name_union dev_name;
747 struct tomoyo_name_union dir_name;
748 struct tomoyo_name_union fs_type;
749 struct tomoyo_number_union flags;
750 };
751
752 /* Structure for "misc env" directive in domain policy. */
753 struct tomoyo_env_acl {
754 struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_ENV_ACL */
755 const struct tomoyo_path_info *env; /* environment variable */
756 };
757
758 /* Structure for "network inet" directive. */
759 struct tomoyo_inet_acl {
760 struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_INET_ACL */
761 u8 protocol;
762 u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
763 struct tomoyo_ipaddr_union address;
764 struct tomoyo_number_union port;
765 };
766
767 /* Structure for "network unix" directive. */
768 struct tomoyo_unix_acl {
769 struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_UNIX_ACL */
770 u8 protocol;
771 u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
772 struct tomoyo_name_union name;
773 };
774
775 /* Structure for holding a line from /sys/kernel/security/tomoyo/ interface. */
776 struct tomoyo_acl_param {
777 char *data;
778 struct list_head *list;
779 struct tomoyo_policy_namespace *ns;
780 bool is_delete;
781 };
782
783 #define TOMOYO_MAX_IO_READ_QUEUE 64
784
785 /*
786 * Structure for reading/writing policy via /sys/kernel/security/tomoyo
787 * interfaces.
788 */
789 struct tomoyo_io_buffer {
790 void (*read) (struct tomoyo_io_buffer *);
791 int (*write) (struct tomoyo_io_buffer *);
792 unsigned int (*poll) (struct file *file, poll_table *wait);
793 /* Exclusive lock for this structure. */
794 struct mutex io_sem;
795 char __user *read_user_buf;
796 size_t read_user_buf_avail;
797 struct {
798 struct list_head *ns;
799 struct list_head *domain;
800 struct list_head *group;
801 struct list_head *acl;
802 size_t avail;
803 unsigned int step;
804 unsigned int query_index;
805 u16 index;
806 u16 cond_index;
807 u8 acl_group_index;
808 u8 cond_step;
809 u8 bit;
810 u8 w_pos;
811 bool eof;
812 bool print_this_domain_only;
813 bool print_transition_related_only;
814 bool print_cond_part;
815 const char *w[TOMOYO_MAX_IO_READ_QUEUE];
816 } r;
817 struct {
818 struct tomoyo_policy_namespace *ns;
819 /* The position currently writing to. */
820 struct tomoyo_domain_info *domain;
821 /* Bytes available for writing. */
822 size_t avail;
823 bool is_delete;
824 } w;
825 /* Buffer for reading. */
826 char *read_buf;
827 /* Size of read buffer. */
828 size_t readbuf_size;
829 /* Buffer for writing. */
830 char *write_buf;
831 /* Size of write buffer. */
832 size_t writebuf_size;
833 /* Type of this interface. */
834 enum tomoyo_securityfs_interface_index type;
835 /* Users counter protected by tomoyo_io_buffer_list_lock. */
836 u8 users;
837 /* List for telling GC not to kfree() elements. */
838 struct list_head list;
839 };
840
841 /*
842 * Structure for "initialize_domain"/"no_initialize_domain"/"keep_domain"/
843 * "no_keep_domain" keyword.
844 */
845 struct tomoyo_transition_control {
846 struct tomoyo_acl_head head;
847 u8 type; /* One of values in "enum tomoyo_transition_type". */
848 /* True if the domainname is tomoyo_get_last_name(). */
849 bool is_last_name;
850 const struct tomoyo_path_info *domainname; /* Maybe NULL */
851 const struct tomoyo_path_info *program; /* Maybe NULL */
852 };
853
854 /* Structure for "aggregator" keyword. */
855 struct tomoyo_aggregator {
856 struct tomoyo_acl_head head;
857 const struct tomoyo_path_info *original_name;
858 const struct tomoyo_path_info *aggregated_name;
859 };
860
861 /* Structure for policy manager. */
862 struct tomoyo_manager {
863 struct tomoyo_acl_head head;
864 /* A path to program or a domainname. */
865 const struct tomoyo_path_info *manager;
866 };
867
868 struct tomoyo_preference {
869 unsigned int learning_max_entry;
870 bool enforcing_verbose;
871 bool learning_verbose;
872 bool permissive_verbose;
873 };
874
875 /* Structure for /sys/kernel/security/tomnoyo/profile interface. */
876 struct tomoyo_profile {
877 const struct tomoyo_path_info *comment;
878 struct tomoyo_preference *learning;
879 struct tomoyo_preference *permissive;
880 struct tomoyo_preference *enforcing;
881 struct tomoyo_preference preference;
882 u8 default_config;
883 u8 config[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX];
884 unsigned int pref[TOMOYO_MAX_PREF];
885 };
886
887 /* Structure for representing YYYY/MM/DD hh/mm/ss. */
888 struct tomoyo_time {
889 u16 year;
890 u8 month;
891 u8 day;
892 u8 hour;
893 u8 min;
894 u8 sec;
895 };
896
897 /* Structure for policy namespace. */
898 struct tomoyo_policy_namespace {
899 /* Profile table. Memory is allocated as needed. */
900 struct tomoyo_profile *profile_ptr[TOMOYO_MAX_PROFILES];
901 /* List of "struct tomoyo_group". */
902 struct list_head group_list[TOMOYO_MAX_GROUP];
903 /* List of policy. */
904 struct list_head policy_list[TOMOYO_MAX_POLICY];
905 /* The global ACL referred by "use_group" keyword. */
906 struct list_head acl_group[TOMOYO_MAX_ACL_GROUPS];
907 /* List for connecting to tomoyo_namespace_list list. */
908 struct list_head namespace_list;
909 /* Profile version. Currently only 20110903 is defined. */
910 unsigned int profile_version;
911 /* Name of this namespace (e.g. "<kernel>", "</usr/sbin/httpd>" ). */
912 const char *name;
913 };
914
915 /********** Function prototypes. **********/
916
917 bool tomoyo_address_matches_group(const bool is_ipv6, const __be32 *address,
918 const struct tomoyo_group *group);
919 bool tomoyo_compare_number_union(const unsigned long value,
920 const struct tomoyo_number_union *ptr);
921 bool tomoyo_condition(struct tomoyo_request_info *r,
922 const struct tomoyo_condition *cond);
923 bool tomoyo_correct_domain(const unsigned char *domainname);
924 bool tomoyo_correct_path(const char *filename);
925 bool tomoyo_correct_word(const char *string);
926 bool tomoyo_domain_def(const unsigned char *buffer);
927 bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
928 bool tomoyo_dump_page(struct linux_binprm *bprm, unsigned long pos,
929 struct tomoyo_page_dump *dump);
930 bool tomoyo_memory_ok(void *ptr);
931 bool tomoyo_number_matches_group(const unsigned long min,
932 const unsigned long max,
933 const struct tomoyo_group *group);
934 bool tomoyo_parse_ipaddr_union(struct tomoyo_acl_param *param,
935 struct tomoyo_ipaddr_union *ptr);
936 bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
937 struct tomoyo_name_union *ptr);
938 bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
939 struct tomoyo_number_union *ptr);
940 bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
941 const struct tomoyo_path_info *pattern);
942 bool tomoyo_permstr(const char *string, const char *keyword);
943 bool tomoyo_str_starts(char **src, const char *find);
944 char *tomoyo_encode(const char *str);
945 char *tomoyo_encode2(const char *str, int str_len);
946 char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
947 va_list args);
948 char *tomoyo_read_token(struct tomoyo_acl_param *param);
949 char *tomoyo_realpath_from_path(const struct path *path);
950 char *tomoyo_realpath_nofollow(const char *pathname);
951 const char *tomoyo_get_exe(void);
952 const char *tomoyo_yesno(const unsigned int value);
953 const struct tomoyo_path_info *tomoyo_compare_name_union
954 (const struct tomoyo_path_info *name, const struct tomoyo_name_union *ptr);
955 const struct tomoyo_path_info *tomoyo_get_domainname
956 (struct tomoyo_acl_param *param);
957 const struct tomoyo_path_info *tomoyo_get_name(const char *name);
958 const struct tomoyo_path_info *tomoyo_path_matches_group
959 (const struct tomoyo_path_info *pathname, const struct tomoyo_group *group);
960 int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
961 const struct path *path, const int flag);
962 void tomoyo_close_control(struct tomoyo_io_buffer *head);
963 int tomoyo_env_perm(struct tomoyo_request_info *r, const char *env);
964 int tomoyo_execute_permission(struct tomoyo_request_info *r,
965 const struct tomoyo_path_info *filename);
966 int tomoyo_find_next_domain(struct linux_binprm *bprm);
967 int tomoyo_get_mode(const struct tomoyo_policy_namespace *ns, const u8 profile,
968 const u8 index);
969 int tomoyo_init_request_info(struct tomoyo_request_info *r,
970 struct tomoyo_domain_info *domain,
971 const u8 index);
972 int tomoyo_mkdev_perm(const u8 operation, const struct path *path,
973 const unsigned int mode, unsigned int dev);
974 int tomoyo_mount_permission(const char *dev_name, const struct path *path,
975 const char *type, unsigned long flags,
976 void *data_page);
977 int tomoyo_open_control(const u8 type, struct file *file);
978 int tomoyo_path2_perm(const u8 operation, const struct path *path1,
979 const struct path *path2);
980 int tomoyo_path_number_perm(const u8 operation, const struct path *path,
981 unsigned long number);
982 int tomoyo_path_perm(const u8 operation, const struct path *path,
983 const char *target);
984 unsigned int tomoyo_poll_control(struct file *file, poll_table *wait);
985 unsigned int tomoyo_poll_log(struct file *file, poll_table *wait);
986 int tomoyo_socket_bind_permission(struct socket *sock, struct sockaddr *addr,
987 int addr_len);
988 int tomoyo_socket_connect_permission(struct socket *sock,
989 struct sockaddr *addr, int addr_len);
990 int tomoyo_socket_listen_permission(struct socket *sock);
991 int tomoyo_socket_sendmsg_permission(struct socket *sock, struct msghdr *msg,
992 int size);
993 int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
994 __printf(2, 3);
995 int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
996 struct tomoyo_acl_param *param,
997 bool (*check_duplicate)
998 (const struct tomoyo_acl_info *,
999 const struct tomoyo_acl_info *),
1000 bool (*merge_duplicate)
1001 (struct tomoyo_acl_info *, struct tomoyo_acl_info *,
1002 const bool));
1003 int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
1004 struct tomoyo_acl_param *param,
1005 bool (*check_duplicate)
1006 (const struct tomoyo_acl_head *,
1007 const struct tomoyo_acl_head *));
1008 int tomoyo_write_aggregator(struct tomoyo_acl_param *param);
1009 int tomoyo_write_file(struct tomoyo_acl_param *param);
1010 int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type);
1011 int tomoyo_write_misc(struct tomoyo_acl_param *param);
1012 int tomoyo_write_inet_network(struct tomoyo_acl_param *param);
1013 int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
1014 const u8 type);
1015 int tomoyo_write_unix_network(struct tomoyo_acl_param *param);
1016 ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
1017 const int buffer_len);
1018 ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
1019 const char __user *buffer, const int buffer_len);
1020 struct tomoyo_condition *tomoyo_get_condition(struct tomoyo_acl_param *param);
1021 struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
1022 const bool transit);
1023 struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
1024 struct tomoyo_group *tomoyo_get_group(struct tomoyo_acl_param *param,
1025 const u8 idx);
1026 struct tomoyo_policy_namespace *tomoyo_assign_namespace
1027 (const char *domainname);
1028 struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
1029 const u8 profile);
1030 unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
1031 const u8 index);
1032 u8 tomoyo_parse_ulong(unsigned long *result, char **str);
1033 void *tomoyo_commit_ok(void *data, const unsigned int size);
1034 void __init tomoyo_load_builtin_policy(void);
1035 void __init tomoyo_mm_init(void);
1036 void tomoyo_check_acl(struct tomoyo_request_info *r,
1037 bool (*check_entry) (struct tomoyo_request_info *,
1038 const struct tomoyo_acl_info *));
1039 void tomoyo_check_profile(void);
1040 void tomoyo_convert_time(time_t time, struct tomoyo_time *stamp);
1041 void tomoyo_del_condition(struct list_head *element);
1042 void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
1043 void tomoyo_get_attributes(struct tomoyo_obj_info *obj);
1044 void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns);
1045 void tomoyo_load_policy(const char *filename);
1046 void tomoyo_normalize_line(unsigned char *buffer);
1047 void tomoyo_notify_gc(struct tomoyo_io_buffer *head, const bool is_register);
1048 void tomoyo_print_ip(char *buf, const unsigned int size,
1049 const struct tomoyo_ipaddr_union *ptr);
1050 void tomoyo_print_ulong(char *buffer, const int buffer_len,
1051 const unsigned long value, const u8 type);
1052 void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
1053 void tomoyo_put_number_union(struct tomoyo_number_union *ptr);
1054 void tomoyo_read_log(struct tomoyo_io_buffer *head);
1055 void tomoyo_update_stat(const u8 index);
1056 void tomoyo_warn_oom(const char *function);
1057 void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
1058 __printf(2, 3);
1059 void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
1060 va_list args);
1061
1062 /********** External variable definitions. **********/
1063
1064 extern bool tomoyo_policy_loaded;
1065 extern const char * const tomoyo_condition_keyword
1066 [TOMOYO_MAX_CONDITION_KEYWORD];
1067 extern const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
1068 extern const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
1069 + TOMOYO_MAX_MAC_CATEGORY_INDEX];
1070 extern const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE];
1071 extern const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION];
1072 extern const char * const tomoyo_proto_keyword[TOMOYO_SOCK_MAX];
1073 extern const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION];
1074 extern const u8 tomoyo_index2category[TOMOYO_MAX_MAC_INDEX];
1075 extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
1076 extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
1077 extern const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION];
1078 extern struct list_head tomoyo_condition_list;
1079 extern struct list_head tomoyo_domain_list;
1080 extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
1081 extern struct list_head tomoyo_namespace_list;
1082 extern struct mutex tomoyo_policy_lock;
1083 extern struct srcu_struct tomoyo_ss;
1084 extern struct tomoyo_domain_info tomoyo_kernel_domain;
1085 extern struct tomoyo_policy_namespace tomoyo_kernel_namespace;
1086 extern unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
1087 extern unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
1088
1089 /********** Inlined functions. **********/
1090
1091 /**
1092 * tomoyo_read_lock - Take lock for protecting policy.
1093 *
1094 * Returns index number for tomoyo_read_unlock().
1095 */
tomoyo_read_lock(void)1096 static inline int tomoyo_read_lock(void)
1097 {
1098 return srcu_read_lock(&tomoyo_ss);
1099 }
1100
1101 /**
1102 * tomoyo_read_unlock - Release lock for protecting policy.
1103 *
1104 * @idx: Index number returned by tomoyo_read_lock().
1105 *
1106 * Returns nothing.
1107 */
tomoyo_read_unlock(int idx)1108 static inline void tomoyo_read_unlock(int idx)
1109 {
1110 srcu_read_unlock(&tomoyo_ss, idx);
1111 }
1112
1113 /**
1114 * tomoyo_sys_getppid - Copy of getppid().
1115 *
1116 * Returns parent process's PID.
1117 *
1118 * Alpha does not have getppid() defined. To be able to build this module on
1119 * Alpha, I have to copy getppid() from kernel/timer.c.
1120 */
tomoyo_sys_getppid(void)1121 static inline pid_t tomoyo_sys_getppid(void)
1122 {
1123 pid_t pid;
1124 rcu_read_lock();
1125 pid = task_tgid_vnr(rcu_dereference(current->real_parent));
1126 rcu_read_unlock();
1127 return pid;
1128 }
1129
1130 /**
1131 * tomoyo_sys_getpid - Copy of getpid().
1132 *
1133 * Returns current thread's PID.
1134 *
1135 * Alpha does not have getpid() defined. To be able to build this module on
1136 * Alpha, I have to copy getpid() from kernel/timer.c.
1137 */
tomoyo_sys_getpid(void)1138 static inline pid_t tomoyo_sys_getpid(void)
1139 {
1140 return task_tgid_vnr(current);
1141 }
1142
1143 /**
1144 * tomoyo_pathcmp - strcmp() for "struct tomoyo_path_info" structure.
1145 *
1146 * @a: Pointer to "struct tomoyo_path_info".
1147 * @b: Pointer to "struct tomoyo_path_info".
1148 *
1149 * Returns true if @a == @b, false otherwise.
1150 */
tomoyo_pathcmp(const struct tomoyo_path_info * a,const struct tomoyo_path_info * b)1151 static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a,
1152 const struct tomoyo_path_info *b)
1153 {
1154 return a->hash != b->hash || strcmp(a->name, b->name);
1155 }
1156
1157 /**
1158 * tomoyo_put_name - Drop reference on "struct tomoyo_name".
1159 *
1160 * @name: Pointer to "struct tomoyo_path_info". Maybe NULL.
1161 *
1162 * Returns nothing.
1163 */
tomoyo_put_name(const struct tomoyo_path_info * name)1164 static inline void tomoyo_put_name(const struct tomoyo_path_info *name)
1165 {
1166 if (name) {
1167 struct tomoyo_name *ptr =
1168 container_of(name, typeof(*ptr), entry);
1169 atomic_dec(&ptr->head.users);
1170 }
1171 }
1172
1173 /**
1174 * tomoyo_put_condition - Drop reference on "struct tomoyo_condition".
1175 *
1176 * @cond: Pointer to "struct tomoyo_condition". Maybe NULL.
1177 *
1178 * Returns nothing.
1179 */
tomoyo_put_condition(struct tomoyo_condition * cond)1180 static inline void tomoyo_put_condition(struct tomoyo_condition *cond)
1181 {
1182 if (cond)
1183 atomic_dec(&cond->head.users);
1184 }
1185
1186 /**
1187 * tomoyo_put_group - Drop reference on "struct tomoyo_group".
1188 *
1189 * @group: Pointer to "struct tomoyo_group". Maybe NULL.
1190 *
1191 * Returns nothing.
1192 */
tomoyo_put_group(struct tomoyo_group * group)1193 static inline void tomoyo_put_group(struct tomoyo_group *group)
1194 {
1195 if (group)
1196 atomic_dec(&group->head.users);
1197 }
1198
1199 /**
1200 * tomoyo_domain - Get "struct tomoyo_domain_info" for current thread.
1201 *
1202 * Returns pointer to "struct tomoyo_domain_info" for current thread.
1203 */
tomoyo_domain(void)1204 static inline struct tomoyo_domain_info *tomoyo_domain(void)
1205 {
1206 return current_cred()->security;
1207 }
1208
1209 /**
1210 * tomoyo_real_domain - Get "struct tomoyo_domain_info" for specified thread.
1211 *
1212 * @task: Pointer to "struct task_struct".
1213 *
1214 * Returns pointer to "struct tomoyo_security" for specified thread.
1215 */
tomoyo_real_domain(struct task_struct * task)1216 static inline struct tomoyo_domain_info *tomoyo_real_domain(struct task_struct
1217 *task)
1218 {
1219 return task_cred_xxx(task, security);
1220 }
1221
1222 /**
1223 * tomoyo_same_name_union - Check for duplicated "struct tomoyo_name_union" entry.
1224 *
1225 * @a: Pointer to "struct tomoyo_name_union".
1226 * @b: Pointer to "struct tomoyo_name_union".
1227 *
1228 * Returns true if @a == @b, false otherwise.
1229 */
tomoyo_same_name_union(const struct tomoyo_name_union * a,const struct tomoyo_name_union * b)1230 static inline bool tomoyo_same_name_union
1231 (const struct tomoyo_name_union *a, const struct tomoyo_name_union *b)
1232 {
1233 return a->filename == b->filename && a->group == b->group;
1234 }
1235
1236 /**
1237 * tomoyo_same_number_union - Check for duplicated "struct tomoyo_number_union" entry.
1238 *
1239 * @a: Pointer to "struct tomoyo_number_union".
1240 * @b: Pointer to "struct tomoyo_number_union".
1241 *
1242 * Returns true if @a == @b, false otherwise.
1243 */
tomoyo_same_number_union(const struct tomoyo_number_union * a,const struct tomoyo_number_union * b)1244 static inline bool tomoyo_same_number_union
1245 (const struct tomoyo_number_union *a, const struct tomoyo_number_union *b)
1246 {
1247 return a->values[0] == b->values[0] && a->values[1] == b->values[1] &&
1248 a->group == b->group && a->value_type[0] == b->value_type[0] &&
1249 a->value_type[1] == b->value_type[1];
1250 }
1251
1252 /**
1253 * tomoyo_same_ipaddr_union - Check for duplicated "struct tomoyo_ipaddr_union" entry.
1254 *
1255 * @a: Pointer to "struct tomoyo_ipaddr_union".
1256 * @b: Pointer to "struct tomoyo_ipaddr_union".
1257 *
1258 * Returns true if @a == @b, false otherwise.
1259 */
tomoyo_same_ipaddr_union(const struct tomoyo_ipaddr_union * a,const struct tomoyo_ipaddr_union * b)1260 static inline bool tomoyo_same_ipaddr_union
1261 (const struct tomoyo_ipaddr_union *a, const struct tomoyo_ipaddr_union *b)
1262 {
1263 return !memcmp(a->ip, b->ip, sizeof(a->ip)) && a->group == b->group &&
1264 a->is_ipv6 == b->is_ipv6;
1265 }
1266
1267 /**
1268 * tomoyo_current_namespace - Get "struct tomoyo_policy_namespace" for current thread.
1269 *
1270 * Returns pointer to "struct tomoyo_policy_namespace" for current thread.
1271 */
tomoyo_current_namespace(void)1272 static inline struct tomoyo_policy_namespace *tomoyo_current_namespace(void)
1273 {
1274 return tomoyo_domain()->ns;
1275 }
1276
1277 #if defined(CONFIG_SLOB)
1278
1279 /**
1280 * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
1281 *
1282 * @size: Size to be rounded up.
1283 *
1284 * Returns @size.
1285 *
1286 * Since SLOB does not round up, this function simply returns @size.
1287 */
tomoyo_round2(size_t size)1288 static inline int tomoyo_round2(size_t size)
1289 {
1290 return size;
1291 }
1292
1293 #else
1294
1295 /**
1296 * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
1297 *
1298 * @size: Size to be rounded up.
1299 *
1300 * Returns rounded size.
1301 *
1302 * Strictly speaking, SLAB may be able to allocate (e.g.) 96 bytes instead of
1303 * (e.g.) 128 bytes.
1304 */
tomoyo_round2(size_t size)1305 static inline int tomoyo_round2(size_t size)
1306 {
1307 #if PAGE_SIZE == 4096
1308 size_t bsize = 32;
1309 #else
1310 size_t bsize = 64;
1311 #endif
1312 if (!size)
1313 return 0;
1314 while (size > bsize)
1315 bsize <<= 1;
1316 return bsize;
1317 }
1318
1319 #endif
1320
1321 /**
1322 * list_for_each_cookie - iterate over a list with cookie.
1323 * @pos: the &struct list_head to use as a loop cursor.
1324 * @head: the head for your list.
1325 */
1326 #define list_for_each_cookie(pos, head) \
1327 if (!pos) \
1328 pos = srcu_dereference((head)->next, &tomoyo_ss); \
1329 for ( ; pos != (head); pos = srcu_dereference(pos->next, &tomoyo_ss))
1330
1331 #endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */
1332