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