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