xref: /openbmc/linux/security/tomoyo/common.h (revision 31b90347)
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  */
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  */
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  */
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  */
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  */
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  */
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  */
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  */
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  */
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  */
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  */
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  */
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  */
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  */
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  */
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  */
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