1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * security/tomoyo/common.h
4  *
5  * Header file for TOMOYO.
6  *
7  * Copyright (C) 2005-2011  NTT DATA CORPORATION
8  */
9 
10 #ifndef _SECURITY_TOMOYO_COMMON_H
11 #define _SECURITY_TOMOYO_COMMON_H
12 
13 #define pr_fmt(fmt) fmt
14 
15 #include <linux/ctype.h>
16 #include <linux/string.h>
17 #include <linux/mm.h>
18 #include <linux/file.h>
19 #include <linux/kmod.h>
20 #include <linux/fs.h>
21 #include <linux/sched.h>
22 #include <linux/namei.h>
23 #include <linux/mount.h>
24 #include <linux/list.h>
25 #include <linux/cred.h>
26 #include <linux/poll.h>
27 #include <linux/binfmts.h>
28 #include <linux/highmem.h>
29 #include <linux/net.h>
30 #include <linux/inet.h>
31 #include <linux/in.h>
32 #include <linux/in6.h>
33 #include <linux/un.h>
34 #include <linux/lsm_hooks.h>
35 #include <net/sock.h>
36 #include <net/af_unix.h>
37 #include <net/ip.h>
38 #include <net/ipv6.h>
39 #include <net/udp.h>
40 
41 /********** Constants definitions. **********/
42 
43 /*
44  * TOMOYO uses this hash only when appending a string into the string
45  * table. Frequency of appending strings is very low. So we don't need
46  * large (e.g. 64k) hash size. 256 will be sufficient.
47  */
48 #define TOMOYO_HASH_BITS  8
49 #define TOMOYO_MAX_HASH (1u<<TOMOYO_HASH_BITS)
50 
51 /*
52  * TOMOYO checks only SOCK_STREAM, SOCK_DGRAM, SOCK_RAW, SOCK_SEQPACKET.
53  * Therefore, we don't need SOCK_MAX.
54  */
55 #define TOMOYO_SOCK_MAX 6
56 
57 #define TOMOYO_EXEC_TMPSIZE     4096
58 
59 /* Garbage collector is trying to kfree() this element. */
60 #define TOMOYO_GC_IN_PROGRESS -1
61 
62 /* Profile number is an integer between 0 and 255. */
63 #define TOMOYO_MAX_PROFILES 256
64 
65 /* Group number is an integer between 0 and 255. */
66 #define TOMOYO_MAX_ACL_GROUPS 256
67 
68 /* Index numbers for "struct tomoyo_condition". */
69 enum tomoyo_conditions_index {
70 	TOMOYO_TASK_UID,             /* current_uid()   */
71 	TOMOYO_TASK_EUID,            /* current_euid()  */
72 	TOMOYO_TASK_SUID,            /* current_suid()  */
73 	TOMOYO_TASK_FSUID,           /* current_fsuid() */
74 	TOMOYO_TASK_GID,             /* current_gid()   */
75 	TOMOYO_TASK_EGID,            /* current_egid()  */
76 	TOMOYO_TASK_SGID,            /* current_sgid()  */
77 	TOMOYO_TASK_FSGID,           /* current_fsgid() */
78 	TOMOYO_TASK_PID,             /* sys_getpid()   */
79 	TOMOYO_TASK_PPID,            /* sys_getppid()  */
80 	TOMOYO_EXEC_ARGC,            /* "struct linux_binprm *"->argc */
81 	TOMOYO_EXEC_ENVC,            /* "struct linux_binprm *"->envc */
82 	TOMOYO_TYPE_IS_SOCKET,       /* S_IFSOCK */
83 	TOMOYO_TYPE_IS_SYMLINK,      /* S_IFLNK */
84 	TOMOYO_TYPE_IS_FILE,         /* S_IFREG */
85 	TOMOYO_TYPE_IS_BLOCK_DEV,    /* S_IFBLK */
86 	TOMOYO_TYPE_IS_DIRECTORY,    /* S_IFDIR */
87 	TOMOYO_TYPE_IS_CHAR_DEV,     /* S_IFCHR */
88 	TOMOYO_TYPE_IS_FIFO,         /* S_IFIFO */
89 	TOMOYO_MODE_SETUID,          /* S_ISUID */
90 	TOMOYO_MODE_SETGID,          /* S_ISGID */
91 	TOMOYO_MODE_STICKY,          /* S_ISVTX */
92 	TOMOYO_MODE_OWNER_READ,      /* S_IRUSR */
93 	TOMOYO_MODE_OWNER_WRITE,     /* S_IWUSR */
94 	TOMOYO_MODE_OWNER_EXECUTE,   /* S_IXUSR */
95 	TOMOYO_MODE_GROUP_READ,      /* S_IRGRP */
96 	TOMOYO_MODE_GROUP_WRITE,     /* S_IWGRP */
97 	TOMOYO_MODE_GROUP_EXECUTE,   /* S_IXGRP */
98 	TOMOYO_MODE_OTHERS_READ,     /* S_IROTH */
99 	TOMOYO_MODE_OTHERS_WRITE,    /* S_IWOTH */
100 	TOMOYO_MODE_OTHERS_EXECUTE,  /* S_IXOTH */
101 	TOMOYO_EXEC_REALPATH,
102 	TOMOYO_SYMLINK_TARGET,
103 	TOMOYO_PATH1_UID,
104 	TOMOYO_PATH1_GID,
105 	TOMOYO_PATH1_INO,
106 	TOMOYO_PATH1_MAJOR,
107 	TOMOYO_PATH1_MINOR,
108 	TOMOYO_PATH1_PERM,
109 	TOMOYO_PATH1_TYPE,
110 	TOMOYO_PATH1_DEV_MAJOR,
111 	TOMOYO_PATH1_DEV_MINOR,
112 	TOMOYO_PATH2_UID,
113 	TOMOYO_PATH2_GID,
114 	TOMOYO_PATH2_INO,
115 	TOMOYO_PATH2_MAJOR,
116 	TOMOYO_PATH2_MINOR,
117 	TOMOYO_PATH2_PERM,
118 	TOMOYO_PATH2_TYPE,
119 	TOMOYO_PATH2_DEV_MAJOR,
120 	TOMOYO_PATH2_DEV_MINOR,
121 	TOMOYO_PATH1_PARENT_UID,
122 	TOMOYO_PATH1_PARENT_GID,
123 	TOMOYO_PATH1_PARENT_INO,
124 	TOMOYO_PATH1_PARENT_PERM,
125 	TOMOYO_PATH2_PARENT_UID,
126 	TOMOYO_PATH2_PARENT_GID,
127 	TOMOYO_PATH2_PARENT_INO,
128 	TOMOYO_PATH2_PARENT_PERM,
129 	TOMOYO_MAX_CONDITION_KEYWORD,
130 	TOMOYO_NUMBER_UNION,
131 	TOMOYO_NAME_UNION,
132 	TOMOYO_ARGV_ENTRY,
133 	TOMOYO_ENVP_ENTRY,
134 };
135 
136 
137 /* Index numbers for stat(). */
138 enum tomoyo_path_stat_index {
139 	/* Do not change this order. */
140 	TOMOYO_PATH1,
141 	TOMOYO_PATH1_PARENT,
142 	TOMOYO_PATH2,
143 	TOMOYO_PATH2_PARENT,
144 	TOMOYO_MAX_PATH_STAT
145 };
146 
147 /* Index numbers for operation mode. */
148 enum tomoyo_mode_index {
149 	TOMOYO_CONFIG_DISABLED,
150 	TOMOYO_CONFIG_LEARNING,
151 	TOMOYO_CONFIG_PERMISSIVE,
152 	TOMOYO_CONFIG_ENFORCING,
153 	TOMOYO_CONFIG_MAX_MODE,
154 	TOMOYO_CONFIG_WANT_REJECT_LOG =  64,
155 	TOMOYO_CONFIG_WANT_GRANT_LOG  = 128,
156 	TOMOYO_CONFIG_USE_DEFAULT     = 255,
157 };
158 
159 /* Index numbers for entry type. */
160 enum tomoyo_policy_id {
161 	TOMOYO_ID_GROUP,
162 	TOMOYO_ID_ADDRESS_GROUP,
163 	TOMOYO_ID_PATH_GROUP,
164 	TOMOYO_ID_NUMBER_GROUP,
165 	TOMOYO_ID_TRANSITION_CONTROL,
166 	TOMOYO_ID_AGGREGATOR,
167 	TOMOYO_ID_MANAGER,
168 	TOMOYO_ID_CONDITION,
169 	TOMOYO_ID_NAME,
170 	TOMOYO_ID_ACL,
171 	TOMOYO_ID_DOMAIN,
172 	TOMOYO_MAX_POLICY
173 };
174 
175 /* Index numbers for domain's attributes. */
176 enum tomoyo_domain_info_flags_index {
177 	/* Quota warnning flag.   */
178 	TOMOYO_DIF_QUOTA_WARNED,
179 	/*
180 	 * This domain was unable to create a new domain at
181 	 * tomoyo_find_next_domain() because the name of the domain to be
182 	 * created was too long or it could not allocate memory.
183 	 * More than one process continued execve() without domain transition.
184 	 */
185 	TOMOYO_DIF_TRANSITION_FAILED,
186 	TOMOYO_MAX_DOMAIN_INFO_FLAGS
187 };
188 
189 /* Index numbers for audit type. */
190 enum tomoyo_grant_log {
191 	/* Follow profile's configuration. */
192 	TOMOYO_GRANTLOG_AUTO,
193 	/* Do not generate grant log. */
194 	TOMOYO_GRANTLOG_NO,
195 	/* Generate grant_log. */
196 	TOMOYO_GRANTLOG_YES,
197 };
198 
199 /* Index numbers for group entries. */
200 enum tomoyo_group_id {
201 	TOMOYO_PATH_GROUP,
202 	TOMOYO_NUMBER_GROUP,
203 	TOMOYO_ADDRESS_GROUP,
204 	TOMOYO_MAX_GROUP
205 };
206 
207 /* Index numbers for type of numeric values. */
208 enum tomoyo_value_type {
209 	TOMOYO_VALUE_TYPE_INVALID,
210 	TOMOYO_VALUE_TYPE_DECIMAL,
211 	TOMOYO_VALUE_TYPE_OCTAL,
212 	TOMOYO_VALUE_TYPE_HEXADECIMAL,
213 };
214 
215 /* Index numbers for domain transition control keywords. */
216 enum tomoyo_transition_type {
217 	/* Do not change this order, */
218 	TOMOYO_TRANSITION_CONTROL_NO_RESET,
219 	TOMOYO_TRANSITION_CONTROL_RESET,
220 	TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE,
221 	TOMOYO_TRANSITION_CONTROL_INITIALIZE,
222 	TOMOYO_TRANSITION_CONTROL_NO_KEEP,
223 	TOMOYO_TRANSITION_CONTROL_KEEP,
224 	TOMOYO_MAX_TRANSITION_TYPE
225 };
226 
227 /* Index numbers for Access Controls. */
228 enum tomoyo_acl_entry_type_index {
229 	TOMOYO_TYPE_PATH_ACL,
230 	TOMOYO_TYPE_PATH2_ACL,
231 	TOMOYO_TYPE_PATH_NUMBER_ACL,
232 	TOMOYO_TYPE_MKDEV_ACL,
233 	TOMOYO_TYPE_MOUNT_ACL,
234 	TOMOYO_TYPE_INET_ACL,
235 	TOMOYO_TYPE_UNIX_ACL,
236 	TOMOYO_TYPE_ENV_ACL,
237 	TOMOYO_TYPE_MANUAL_TASK_ACL,
238 };
239 
240 /* Index numbers for access controls with one pathname. */
241 enum tomoyo_path_acl_index {
242 	TOMOYO_TYPE_EXECUTE,
243 	TOMOYO_TYPE_READ,
244 	TOMOYO_TYPE_WRITE,
245 	TOMOYO_TYPE_APPEND,
246 	TOMOYO_TYPE_UNLINK,
247 	TOMOYO_TYPE_GETATTR,
248 	TOMOYO_TYPE_RMDIR,
249 	TOMOYO_TYPE_TRUNCATE,
250 	TOMOYO_TYPE_SYMLINK,
251 	TOMOYO_TYPE_CHROOT,
252 	TOMOYO_TYPE_UMOUNT,
253 	TOMOYO_MAX_PATH_OPERATION
254 };
255 
256 /* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
257 enum tomoyo_memory_stat_type {
258 	TOMOYO_MEMORY_POLICY,
259 	TOMOYO_MEMORY_AUDIT,
260 	TOMOYO_MEMORY_QUERY,
261 	TOMOYO_MAX_MEMORY_STAT
262 };
263 
264 enum tomoyo_mkdev_acl_index {
265 	TOMOYO_TYPE_MKBLOCK,
266 	TOMOYO_TYPE_MKCHAR,
267 	TOMOYO_MAX_MKDEV_OPERATION
268 };
269 
270 /* Index numbers for socket operations. */
271 enum tomoyo_network_acl_index {
272 	TOMOYO_NETWORK_BIND,    /* bind() operation. */
273 	TOMOYO_NETWORK_LISTEN,  /* listen() operation. */
274 	TOMOYO_NETWORK_CONNECT, /* connect() operation. */
275 	TOMOYO_NETWORK_SEND,    /* send() operation. */
276 	TOMOYO_MAX_NETWORK_OPERATION
277 };
278 
279 /* Index numbers for access controls with two pathnames. */
280 enum tomoyo_path2_acl_index {
281 	TOMOYO_TYPE_LINK,
282 	TOMOYO_TYPE_RENAME,
283 	TOMOYO_TYPE_PIVOT_ROOT,
284 	TOMOYO_MAX_PATH2_OPERATION
285 };
286 
287 /* Index numbers for access controls with one pathname and one number. */
288 enum tomoyo_path_number_acl_index {
289 	TOMOYO_TYPE_CREATE,
290 	TOMOYO_TYPE_MKDIR,
291 	TOMOYO_TYPE_MKFIFO,
292 	TOMOYO_TYPE_MKSOCK,
293 	TOMOYO_TYPE_IOCTL,
294 	TOMOYO_TYPE_CHMOD,
295 	TOMOYO_TYPE_CHOWN,
296 	TOMOYO_TYPE_CHGRP,
297 	TOMOYO_MAX_PATH_NUMBER_OPERATION
298 };
299 
300 /* Index numbers for /sys/kernel/security/tomoyo/ interfaces. */
301 enum tomoyo_securityfs_interface_index {
302 	TOMOYO_DOMAINPOLICY,
303 	TOMOYO_EXCEPTIONPOLICY,
304 	TOMOYO_PROCESS_STATUS,
305 	TOMOYO_STAT,
306 	TOMOYO_AUDIT,
307 	TOMOYO_VERSION,
308 	TOMOYO_PROFILE,
309 	TOMOYO_QUERY,
310 	TOMOYO_MANAGER
311 };
312 
313 /* Index numbers for special mount operations. */
314 enum tomoyo_special_mount {
315 	TOMOYO_MOUNT_BIND,            /* mount --bind /source /dest   */
316 	TOMOYO_MOUNT_MOVE,            /* mount --move /old /new       */
317 	TOMOYO_MOUNT_REMOUNT,         /* mount -o remount /dir        */
318 	TOMOYO_MOUNT_MAKE_UNBINDABLE, /* mount --make-unbindable /dir */
319 	TOMOYO_MOUNT_MAKE_PRIVATE,    /* mount --make-private /dir    */
320 	TOMOYO_MOUNT_MAKE_SLAVE,      /* mount --make-slave /dir      */
321 	TOMOYO_MOUNT_MAKE_SHARED,     /* mount --make-shared /dir     */
322 	TOMOYO_MAX_SPECIAL_MOUNT
323 };
324 
325 /* Index numbers for functionality. */
326 enum tomoyo_mac_index {
327 	TOMOYO_MAC_FILE_EXECUTE,
328 	TOMOYO_MAC_FILE_OPEN,
329 	TOMOYO_MAC_FILE_CREATE,
330 	TOMOYO_MAC_FILE_UNLINK,
331 	TOMOYO_MAC_FILE_GETATTR,
332 	TOMOYO_MAC_FILE_MKDIR,
333 	TOMOYO_MAC_FILE_RMDIR,
334 	TOMOYO_MAC_FILE_MKFIFO,
335 	TOMOYO_MAC_FILE_MKSOCK,
336 	TOMOYO_MAC_FILE_TRUNCATE,
337 	TOMOYO_MAC_FILE_SYMLINK,
338 	TOMOYO_MAC_FILE_MKBLOCK,
339 	TOMOYO_MAC_FILE_MKCHAR,
340 	TOMOYO_MAC_FILE_LINK,
341 	TOMOYO_MAC_FILE_RENAME,
342 	TOMOYO_MAC_FILE_CHMOD,
343 	TOMOYO_MAC_FILE_CHOWN,
344 	TOMOYO_MAC_FILE_CHGRP,
345 	TOMOYO_MAC_FILE_IOCTL,
346 	TOMOYO_MAC_FILE_CHROOT,
347 	TOMOYO_MAC_FILE_MOUNT,
348 	TOMOYO_MAC_FILE_UMOUNT,
349 	TOMOYO_MAC_FILE_PIVOT_ROOT,
350 	TOMOYO_MAC_NETWORK_INET_STREAM_BIND,
351 	TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN,
352 	TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT,
353 	TOMOYO_MAC_NETWORK_INET_DGRAM_BIND,
354 	TOMOYO_MAC_NETWORK_INET_DGRAM_SEND,
355 	TOMOYO_MAC_NETWORK_INET_RAW_BIND,
356 	TOMOYO_MAC_NETWORK_INET_RAW_SEND,
357 	TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND,
358 	TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN,
359 	TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT,
360 	TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND,
361 	TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND,
362 	TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND,
363 	TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN,
364 	TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT,
365 	TOMOYO_MAC_ENVIRON,
366 	TOMOYO_MAX_MAC_INDEX
367 };
368 
369 /* Index numbers for category of functionality. */
370 enum tomoyo_mac_category_index {
371 	TOMOYO_MAC_CATEGORY_FILE,
372 	TOMOYO_MAC_CATEGORY_NETWORK,
373 	TOMOYO_MAC_CATEGORY_MISC,
374 	TOMOYO_MAX_MAC_CATEGORY_INDEX
375 };
376 
377 /*
378  * Retry this request. Returned by tomoyo_supervisor() if policy violation has
379  * occurred in enforcing mode and the userspace daemon decided to retry.
380  *
381  * We must choose a positive value in order to distinguish "granted" (which is
382  * 0) and "rejected" (which is a negative value) and "retry".
383  */
384 #define TOMOYO_RETRY_REQUEST 1
385 
386 /* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
387 enum tomoyo_policy_stat_type {
388 	/* Do not change this order. */
389 	TOMOYO_STAT_POLICY_UPDATES,
390 	TOMOYO_STAT_POLICY_LEARNING,   /* == TOMOYO_CONFIG_LEARNING */
391 	TOMOYO_STAT_POLICY_PERMISSIVE, /* == TOMOYO_CONFIG_PERMISSIVE */
392 	TOMOYO_STAT_POLICY_ENFORCING,  /* == TOMOYO_CONFIG_ENFORCING */
393 	TOMOYO_MAX_POLICY_STAT
394 };
395 
396 /* Index numbers for profile's PREFERENCE values. */
397 enum tomoyo_pref_index {
398 	TOMOYO_PREF_MAX_AUDIT_LOG,
399 	TOMOYO_PREF_MAX_LEARNING_ENTRY,
400 	TOMOYO_MAX_PREF
401 };
402 
403 /********** Structure definitions. **********/
404 
405 /* Common header for holding ACL entries. */
406 struct tomoyo_acl_head {
407 	struct list_head list;
408 	s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
409 } __packed;
410 
411 /* Common header for shared entries. */
412 struct tomoyo_shared_acl_head {
413 	struct list_head list;
414 	atomic_t users;
415 } __packed;
416 
417 struct tomoyo_policy_namespace;
418 
419 /* Structure for request info. */
420 struct tomoyo_request_info {
421 	/*
422 	 * For holding parameters specific to operations which deal files.
423 	 * NULL if not dealing files.
424 	 */
425 	struct tomoyo_obj_info *obj;
426 	/*
427 	 * For holding parameters specific to execve() request.
428 	 * NULL if not dealing execve().
429 	 */
430 	struct tomoyo_execve *ee;
431 	struct tomoyo_domain_info *domain;
432 	/* For holding parameters. */
433 	union {
434 		struct {
435 			const struct tomoyo_path_info *filename;
436 			/* For using wildcards at tomoyo_find_next_domain(). */
437 			const struct tomoyo_path_info *matched_path;
438 			/* One of values in "enum tomoyo_path_acl_index". */
439 			u8 operation;
440 		} path;
441 		struct {
442 			const struct tomoyo_path_info *filename1;
443 			const struct tomoyo_path_info *filename2;
444 			/* One of values in "enum tomoyo_path2_acl_index". */
445 			u8 operation;
446 		} path2;
447 		struct {
448 			const struct tomoyo_path_info *filename;
449 			unsigned int mode;
450 			unsigned int major;
451 			unsigned int minor;
452 			/* One of values in "enum tomoyo_mkdev_acl_index". */
453 			u8 operation;
454 		} mkdev;
455 		struct {
456 			const struct tomoyo_path_info *filename;
457 			unsigned long number;
458 			/*
459 			 * One of values in
460 			 * "enum tomoyo_path_number_acl_index".
461 			 */
462 			u8 operation;
463 		} path_number;
464 		struct {
465 			const struct tomoyo_path_info *name;
466 		} environ;
467 		struct {
468 			const __be32 *address;
469 			u16 port;
470 			/* One of values smaller than TOMOYO_SOCK_MAX. */
471 			u8 protocol;
472 			/* One of values in "enum tomoyo_network_acl_index". */
473 			u8 operation;
474 			bool is_ipv6;
475 		} inet_network;
476 		struct {
477 			const struct tomoyo_path_info *address;
478 			/* One of values smaller than TOMOYO_SOCK_MAX. */
479 			u8 protocol;
480 			/* One of values in "enum tomoyo_network_acl_index". */
481 			u8 operation;
482 		} unix_network;
483 		struct {
484 			const struct tomoyo_path_info *type;
485 			const struct tomoyo_path_info *dir;
486 			const struct tomoyo_path_info *dev;
487 			unsigned long flags;
488 			int need_dev;
489 		} mount;
490 		struct {
491 			const struct tomoyo_path_info *domainname;
492 		} task;
493 	} param;
494 	struct tomoyo_acl_info *matched_acl;
495 	u8 param_type;
496 	bool granted;
497 	u8 retry;
498 	u8 profile;
499 	u8 mode; /* One of tomoyo_mode_index . */
500 	u8 type;
501 };
502 
503 /* Structure for holding a token. */
504 struct tomoyo_path_info {
505 	const char *name;
506 	u32 hash;          /* = full_name_hash(name, strlen(name)) */
507 	u16 const_len;     /* = tomoyo_const_part_length(name)     */
508 	bool is_dir;       /* = tomoyo_strendswith(name, "/")      */
509 	bool is_patterned; /* = tomoyo_path_contains_pattern(name) */
510 };
511 
512 /* Structure for holding string data. */
513 struct tomoyo_name {
514 	struct tomoyo_shared_acl_head head;
515 	struct tomoyo_path_info entry;
516 };
517 
518 /* Structure for holding a word. */
519 struct tomoyo_name_union {
520 	/* Either @filename or @group is NULL. */
521 	const struct tomoyo_path_info *filename;
522 	struct tomoyo_group *group;
523 };
524 
525 /* Structure for holding a number. */
526 struct tomoyo_number_union {
527 	unsigned long values[2];
528 	struct tomoyo_group *group; /* Maybe NULL. */
529 	/* One of values in "enum tomoyo_value_type". */
530 	u8 value_type[2];
531 };
532 
533 /* Structure for holding an IP address. */
534 struct tomoyo_ipaddr_union {
535 	struct in6_addr ip[2]; /* Big endian. */
536 	struct tomoyo_group *group; /* Pointer to address group. */
537 	bool is_ipv6; /* Valid only if @group == NULL. */
538 };
539 
540 /* Structure for "path_group"/"number_group"/"address_group" directive. */
541 struct tomoyo_group {
542 	struct tomoyo_shared_acl_head head;
543 	const struct tomoyo_path_info *group_name;
544 	struct list_head member_list;
545 };
546 
547 /* Structure for "path_group" directive. */
548 struct tomoyo_path_group {
549 	struct tomoyo_acl_head head;
550 	const struct tomoyo_path_info *member_name;
551 };
552 
553 /* Structure for "number_group" directive. */
554 struct tomoyo_number_group {
555 	struct tomoyo_acl_head head;
556 	struct tomoyo_number_union number;
557 };
558 
559 /* Structure for "address_group" directive. */
560 struct tomoyo_address_group {
561 	struct tomoyo_acl_head head;
562 	/* Structure for holding an IP address. */
563 	struct tomoyo_ipaddr_union address;
564 };
565 
566 /* Subset of "struct stat". Used by conditional ACL and audit logs. */
567 struct tomoyo_mini_stat {
568 	kuid_t uid;
569 	kgid_t gid;
570 	ino_t ino;
571 	umode_t mode;
572 	dev_t dev;
573 	dev_t rdev;
574 };
575 
576 /* Structure for dumping argv[] and envp[] of "struct linux_binprm". */
577 struct tomoyo_page_dump {
578 	struct page *page;    /* Previously dumped page. */
579 	char *data;           /* Contents of "page". Size is PAGE_SIZE. */
580 };
581 
582 /* Structure for attribute checks in addition to pathname checks. */
583 struct tomoyo_obj_info {
584 	/*
585 	 * True if tomoyo_get_attributes() was already called, false otherwise.
586 	 */
587 	bool validate_done;
588 	/* True if @stat[] is valid. */
589 	bool stat_valid[TOMOYO_MAX_PATH_STAT];
590 	/* First pathname. Initialized with { NULL, NULL } if no path. */
591 	struct path path1;
592 	/* Second pathname. Initialized with { NULL, NULL } if no path. */
593 	struct path path2;
594 	/*
595 	 * Information on @path1, @path1's parent directory, @path2, @path2's
596 	 * parent directory.
597 	 */
598 	struct tomoyo_mini_stat stat[TOMOYO_MAX_PATH_STAT];
599 	/*
600 	 * Content of symbolic link to be created. NULL for operations other
601 	 * than symlink().
602 	 */
603 	struct tomoyo_path_info *symlink_target;
604 };
605 
606 /* Structure for argv[]. */
607 struct tomoyo_argv {
608 	unsigned long index;
609 	const struct tomoyo_path_info *value;
610 	bool is_not;
611 };
612 
613 /* Structure for envp[]. */
614 struct tomoyo_envp {
615 	const struct tomoyo_path_info *name;
616 	const struct tomoyo_path_info *value;
617 	bool is_not;
618 };
619 
620 /* Structure for execve() operation. */
621 struct tomoyo_execve {
622 	struct tomoyo_request_info r;
623 	struct tomoyo_obj_info obj;
624 	struct linux_binprm *bprm;
625 	const struct tomoyo_path_info *transition;
626 	/* For dumping argv[] and envp[]. */
627 	struct tomoyo_page_dump dump;
628 	/* For temporary use. */
629 	char *tmp; /* Size is TOMOYO_EXEC_TMPSIZE bytes */
630 };
631 
632 /* Structure for entries which follows "struct tomoyo_condition". */
633 struct tomoyo_condition_element {
634 	/*
635 	 * Left hand operand. A "struct tomoyo_argv" for TOMOYO_ARGV_ENTRY, a
636 	 * "struct tomoyo_envp" for TOMOYO_ENVP_ENTRY is attached to the tail
637 	 * of the array of this struct.
638 	 */
639 	u8 left;
640 	/*
641 	 * Right hand operand. A "struct tomoyo_number_union" for
642 	 * TOMOYO_NUMBER_UNION, a "struct tomoyo_name_union" for
643 	 * TOMOYO_NAME_UNION is attached to the tail of the array of this
644 	 * struct.
645 	 */
646 	u8 right;
647 	/* Equation operator. True if equals or overlaps, false otherwise. */
648 	bool equals;
649 };
650 
651 /* Structure for optional arguments. */
652 struct tomoyo_condition {
653 	struct tomoyo_shared_acl_head head;
654 	u32 size; /* Memory size allocated for this entry. */
655 	u16 condc; /* Number of conditions in this struct. */
656 	u16 numbers_count; /* Number of "struct tomoyo_number_union values". */
657 	u16 names_count; /* Number of "struct tomoyo_name_union names". */
658 	u16 argc; /* Number of "struct tomoyo_argv". */
659 	u16 envc; /* Number of "struct tomoyo_envp". */
660 	u8 grant_log; /* One of values in "enum tomoyo_grant_log". */
661 	const struct tomoyo_path_info *transit; /* Maybe NULL. */
662 	/*
663 	 * struct tomoyo_condition_element condition[condc];
664 	 * struct tomoyo_number_union values[numbers_count];
665 	 * struct tomoyo_name_union names[names_count];
666 	 * struct tomoyo_argv argv[argc];
667 	 * struct tomoyo_envp envp[envc];
668 	 */
669 };
670 
671 /* Common header for individual entries. */
672 struct tomoyo_acl_info {
673 	struct list_head list;
674 	struct tomoyo_condition *cond; /* Maybe NULL. */
675 	s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
676 	u8 type; /* One of values in "enum tomoyo_acl_entry_type_index". */
677 } __packed;
678 
679 /* Structure for domain information. */
680 struct tomoyo_domain_info {
681 	struct list_head list;
682 	struct list_head acl_info_list;
683 	/* Name of this domain. Never NULL.          */
684 	const struct tomoyo_path_info *domainname;
685 	/* Namespace for this domain. Never NULL. */
686 	struct tomoyo_policy_namespace *ns;
687 	/* Group numbers to use.   */
688 	unsigned long group[TOMOYO_MAX_ACL_GROUPS / BITS_PER_LONG];
689 	u8 profile;        /* Profile number to use. */
690 	bool is_deleted;   /* Delete flag.           */
691 	bool flags[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
692 	atomic_t users; /* Number of referring tasks. */
693 };
694 
695 /*
696  * Structure for "task manual_domain_transition" directive.
697  */
698 struct tomoyo_task_acl {
699 	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MANUAL_TASK_ACL */
700 	/* Pointer to domainname. */
701 	const struct tomoyo_path_info *domainname;
702 };
703 
704 /*
705  * Structure for "file execute", "file read", "file write", "file append",
706  * "file unlink", "file getattr", "file rmdir", "file truncate",
707  * "file symlink", "file chroot" and "file unmount" directive.
708  */
709 struct tomoyo_path_acl {
710 	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */
711 	u16 perm; /* Bitmask of values in "enum tomoyo_path_acl_index". */
712 	struct tomoyo_name_union name;
713 };
714 
715 /*
716  * Structure for "file create", "file mkdir", "file mkfifo", "file mksock",
717  * "file ioctl", "file chmod", "file chown" and "file chgrp" directive.
718  */
719 struct tomoyo_path_number_acl {
720 	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_NUMBER_ACL */
721 	/* Bitmask of values in "enum tomoyo_path_number_acl_index". */
722 	u8 perm;
723 	struct tomoyo_name_union name;
724 	struct tomoyo_number_union number;
725 };
726 
727 /* Structure for "file mkblock" and "file mkchar" directive. */
728 struct tomoyo_mkdev_acl {
729 	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MKDEV_ACL */
730 	u8 perm; /* Bitmask of values in "enum tomoyo_mkdev_acl_index". */
731 	struct tomoyo_name_union name;
732 	struct tomoyo_number_union mode;
733 	struct tomoyo_number_union major;
734 	struct tomoyo_number_union minor;
735 };
736 
737 /*
738  * Structure for "file rename", "file link" and "file pivot_root" directive.
739  */
740 struct tomoyo_path2_acl {
741 	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */
742 	u8 perm; /* Bitmask of values in "enum tomoyo_path2_acl_index". */
743 	struct tomoyo_name_union name1;
744 	struct tomoyo_name_union name2;
745 };
746 
747 /* Structure for "file mount" directive. */
748 struct tomoyo_mount_acl {
749 	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MOUNT_ACL */
750 	struct tomoyo_name_union dev_name;
751 	struct tomoyo_name_union dir_name;
752 	struct tomoyo_name_union fs_type;
753 	struct tomoyo_number_union flags;
754 };
755 
756 /* Structure for "misc env" directive in domain policy. */
757 struct tomoyo_env_acl {
758 	struct tomoyo_acl_info head;        /* type = TOMOYO_TYPE_ENV_ACL  */
759 	const struct tomoyo_path_info *env; /* environment variable */
760 };
761 
762 /* Structure for "network inet" directive. */
763 struct tomoyo_inet_acl {
764 	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_INET_ACL */
765 	u8 protocol;
766 	u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
767 	struct tomoyo_ipaddr_union address;
768 	struct tomoyo_number_union port;
769 };
770 
771 /* Structure for "network unix" directive. */
772 struct tomoyo_unix_acl {
773 	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_UNIX_ACL */
774 	u8 protocol;
775 	u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
776 	struct tomoyo_name_union name;
777 };
778 
779 /* Structure for holding a line from /sys/kernel/security/tomoyo/ interface. */
780 struct tomoyo_acl_param {
781 	char *data;
782 	struct list_head *list;
783 	struct tomoyo_policy_namespace *ns;
784 	bool is_delete;
785 };
786 
787 #define TOMOYO_MAX_IO_READ_QUEUE 64
788 
789 /*
790  * Structure for reading/writing policy via /sys/kernel/security/tomoyo
791  * interfaces.
792  */
793 struct tomoyo_io_buffer {
794 	void (*read)(struct tomoyo_io_buffer *head);
795 	int (*write)(struct tomoyo_io_buffer *head);
796 	__poll_t (*poll)(struct file *file, poll_table *wait);
797 	/* Exclusive lock for this structure.   */
798 	struct mutex io_sem;
799 	char __user *read_user_buf;
800 	size_t read_user_buf_avail;
801 	struct {
802 		struct list_head *ns;
803 		struct list_head *domain;
804 		struct list_head *group;
805 		struct list_head *acl;
806 		size_t avail;
807 		unsigned int step;
808 		unsigned int query_index;
809 		u16 index;
810 		u16 cond_index;
811 		u8 acl_group_index;
812 		u8 cond_step;
813 		u8 bit;
814 		u8 w_pos;
815 		bool eof;
816 		bool print_this_domain_only;
817 		bool print_transition_related_only;
818 		bool print_cond_part;
819 		const char *w[TOMOYO_MAX_IO_READ_QUEUE];
820 	} r;
821 	struct {
822 		struct tomoyo_policy_namespace *ns;
823 		/* The position currently writing to.   */
824 		struct tomoyo_domain_info *domain;
825 		/* Bytes available for writing.         */
826 		size_t avail;
827 		bool is_delete;
828 	} w;
829 	/* Buffer for reading.                  */
830 	char *read_buf;
831 	/* Size of read buffer.                 */
832 	size_t readbuf_size;
833 	/* Buffer for writing.                  */
834 	char *write_buf;
835 	/* Size of write buffer.                */
836 	size_t writebuf_size;
837 	/* Type of this interface.              */
838 	enum tomoyo_securityfs_interface_index type;
839 	/* Users counter protected by tomoyo_io_buffer_list_lock. */
840 	u8 users;
841 	/* List for telling GC not to kfree() elements. */
842 	struct list_head list;
843 };
844 
845 /*
846  * Structure for "initialize_domain"/"no_initialize_domain"/"keep_domain"/
847  * "no_keep_domain" keyword.
848  */
849 struct tomoyo_transition_control {
850 	struct tomoyo_acl_head head;
851 	u8 type; /* One of values in "enum tomoyo_transition_type".  */
852 	/* True if the domainname is tomoyo_get_last_name(). */
853 	bool is_last_name;
854 	const struct tomoyo_path_info *domainname; /* Maybe NULL */
855 	const struct tomoyo_path_info *program;    /* Maybe NULL */
856 };
857 
858 /* Structure for "aggregator" keyword. */
859 struct tomoyo_aggregator {
860 	struct tomoyo_acl_head head;
861 	const struct tomoyo_path_info *original_name;
862 	const struct tomoyo_path_info *aggregated_name;
863 };
864 
865 /* Structure for policy manager. */
866 struct tomoyo_manager {
867 	struct tomoyo_acl_head head;
868 	/* A path to program or a domainname. */
869 	const struct tomoyo_path_info *manager;
870 };
871 
872 struct tomoyo_preference {
873 	unsigned int learning_max_entry;
874 	bool enforcing_verbose;
875 	bool learning_verbose;
876 	bool permissive_verbose;
877 };
878 
879 /* Structure for /sys/kernel/security/tomnoyo/profile interface. */
880 struct tomoyo_profile {
881 	const struct tomoyo_path_info *comment;
882 	struct tomoyo_preference *learning;
883 	struct tomoyo_preference *permissive;
884 	struct tomoyo_preference *enforcing;
885 	struct tomoyo_preference preference;
886 	u8 default_config;
887 	u8 config[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX];
888 	unsigned int pref[TOMOYO_MAX_PREF];
889 };
890 
891 /* Structure for representing YYYY/MM/DD hh/mm/ss. */
892 struct tomoyo_time {
893 	u16 year;
894 	u8 month;
895 	u8 day;
896 	u8 hour;
897 	u8 min;
898 	u8 sec;
899 };
900 
901 /* Structure for policy namespace. */
902 struct tomoyo_policy_namespace {
903 	/* Profile table. Memory is allocated as needed. */
904 	struct tomoyo_profile *profile_ptr[TOMOYO_MAX_PROFILES];
905 	/* List of "struct tomoyo_group". */
906 	struct list_head group_list[TOMOYO_MAX_GROUP];
907 	/* List of policy. */
908 	struct list_head policy_list[TOMOYO_MAX_POLICY];
909 	/* The global ACL referred by "use_group" keyword. */
910 	struct list_head acl_group[TOMOYO_MAX_ACL_GROUPS];
911 	/* List for connecting to tomoyo_namespace_list list. */
912 	struct list_head namespace_list;
913 	/* Profile version. Currently only 20150505 is defined. */
914 	unsigned int profile_version;
915 	/* Name of this namespace (e.g. "<kernel>", "</usr/sbin/httpd>" ). */
916 	const char *name;
917 };
918 
919 /* Structure for "struct task_struct"->security. */
920 struct tomoyo_task {
921 	struct tomoyo_domain_info *domain_info;
922 	struct tomoyo_domain_info *old_domain_info;
923 };
924 
925 /********** Function prototypes. **********/
926 
927 bool tomoyo_address_matches_group(const bool is_ipv6, const __be32 *address,
928 				  const struct tomoyo_group *group);
929 bool tomoyo_compare_number_union(const unsigned long value,
930 				 const struct tomoyo_number_union *ptr);
931 bool tomoyo_condition(struct tomoyo_request_info *r,
932 		      const struct tomoyo_condition *cond);
933 bool tomoyo_correct_domain(const unsigned char *domainname);
934 bool tomoyo_correct_path(const char *filename);
935 bool tomoyo_correct_word(const char *string);
936 bool tomoyo_domain_def(const unsigned char *buffer);
937 bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
938 bool tomoyo_dump_page(struct linux_binprm *bprm, unsigned long pos,
939 		      struct tomoyo_page_dump *dump);
940 bool tomoyo_memory_ok(void *ptr);
941 bool tomoyo_number_matches_group(const unsigned long min,
942 				 const unsigned long max,
943 				 const struct tomoyo_group *group);
944 bool tomoyo_parse_ipaddr_union(struct tomoyo_acl_param *param,
945 			       struct tomoyo_ipaddr_union *ptr);
946 bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
947 			     struct tomoyo_name_union *ptr);
948 bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
949 			       struct tomoyo_number_union *ptr);
950 bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
951 				 const struct tomoyo_path_info *pattern);
952 bool tomoyo_permstr(const char *string, const char *keyword);
953 bool tomoyo_str_starts(char **src, const char *find);
954 char *tomoyo_encode(const char *str);
955 char *tomoyo_encode2(const char *str, int str_len);
956 char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
957 		      va_list args);
958 char *tomoyo_read_token(struct tomoyo_acl_param *param);
959 char *tomoyo_realpath_from_path(const struct path *path);
960 char *tomoyo_realpath_nofollow(const char *pathname);
961 const char *tomoyo_get_exe(void);
962 const struct tomoyo_path_info *tomoyo_compare_name_union
963 (const struct tomoyo_path_info *name, const struct tomoyo_name_union *ptr);
964 const struct tomoyo_path_info *tomoyo_get_domainname
965 (struct tomoyo_acl_param *param);
966 const struct tomoyo_path_info *tomoyo_get_name(const char *name);
967 const struct tomoyo_path_info *tomoyo_path_matches_group
968 (const struct tomoyo_path_info *pathname, const struct tomoyo_group *group);
969 int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
970 				 const struct path *path, const int flag);
971 void tomoyo_close_control(struct tomoyo_io_buffer *head);
972 int tomoyo_env_perm(struct tomoyo_request_info *r, const char *env);
973 int tomoyo_execute_permission(struct tomoyo_request_info *r,
974 			      const struct tomoyo_path_info *filename);
975 int tomoyo_find_next_domain(struct linux_binprm *bprm);
976 int tomoyo_get_mode(const struct tomoyo_policy_namespace *ns, const u8 profile,
977 		    const u8 index);
978 int tomoyo_init_request_info(struct tomoyo_request_info *r,
979 			     struct tomoyo_domain_info *domain,
980 			     const u8 index);
981 int tomoyo_mkdev_perm(const u8 operation, const struct path *path,
982 		      const unsigned int mode, unsigned int dev);
983 int tomoyo_mount_permission(const char *dev_name, const struct path *path,
984 			    const char *type, unsigned long flags,
985 			    void *data_page);
986 int tomoyo_open_control(const u8 type, struct file *file);
987 int tomoyo_path2_perm(const u8 operation, const struct path *path1,
988 		      const struct path *path2);
989 int tomoyo_path_number_perm(const u8 operation, const struct path *path,
990 			    unsigned long number);
991 int tomoyo_path_perm(const u8 operation, const struct path *path,
992 		     const char *target);
993 __poll_t tomoyo_poll_control(struct file *file, poll_table *wait);
994 __poll_t tomoyo_poll_log(struct file *file, poll_table *wait);
995 int tomoyo_socket_bind_permission(struct socket *sock, struct sockaddr *addr,
996 				  int addr_len);
997 int tomoyo_socket_connect_permission(struct socket *sock,
998 				     struct sockaddr *addr, int addr_len);
999 int tomoyo_socket_listen_permission(struct socket *sock);
1000 int tomoyo_socket_sendmsg_permission(struct socket *sock, struct msghdr *msg,
1001 				     int size);
1002 int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
1003 	__printf(2, 3);
1004 int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
1005 			 struct tomoyo_acl_param *param,
1006 			 bool (*check_duplicate)
1007 			 (const struct tomoyo_acl_info *,
1008 			  const struct tomoyo_acl_info *),
1009 			 bool (*merge_duplicate)
1010 			 (struct tomoyo_acl_info *, struct tomoyo_acl_info *,
1011 			  const bool));
1012 int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
1013 			 struct tomoyo_acl_param *param,
1014 			 bool (*check_duplicate)
1015 			 (const struct tomoyo_acl_head *,
1016 			  const struct tomoyo_acl_head *));
1017 int tomoyo_write_aggregator(struct tomoyo_acl_param *param);
1018 int tomoyo_write_file(struct tomoyo_acl_param *param);
1019 int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type);
1020 int tomoyo_write_misc(struct tomoyo_acl_param *param);
1021 int tomoyo_write_inet_network(struct tomoyo_acl_param *param);
1022 int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
1023 				    const u8 type);
1024 int tomoyo_write_unix_network(struct tomoyo_acl_param *param);
1025 ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
1026 			    const int buffer_len);
1027 ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
1028 			     const char __user *buffer, const int buffer_len);
1029 struct tomoyo_condition *tomoyo_get_condition(struct tomoyo_acl_param *param);
1030 struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
1031 						const bool transit);
1032 struct tomoyo_domain_info *tomoyo_domain(void);
1033 struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
1034 struct tomoyo_group *tomoyo_get_group(struct tomoyo_acl_param *param,
1035 				      const u8 idx);
1036 struct tomoyo_policy_namespace *tomoyo_assign_namespace
1037 (const char *domainname);
1038 struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
1039 				      const u8 profile);
1040 unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
1041 				const u8 index);
1042 u8 tomoyo_parse_ulong(unsigned long *result, char **str);
1043 void *tomoyo_commit_ok(void *data, const unsigned int size);
1044 void __init tomoyo_load_builtin_policy(void);
1045 void __init tomoyo_mm_init(void);
1046 void tomoyo_check_acl(struct tomoyo_request_info *r,
1047 		      bool (*check_entry)(struct tomoyo_request_info *,
1048 					  const struct tomoyo_acl_info *));
1049 void tomoyo_check_profile(void);
1050 void tomoyo_convert_time(time64_t time, struct tomoyo_time *stamp);
1051 void tomoyo_del_condition(struct list_head *element);
1052 void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
1053 void tomoyo_get_attributes(struct tomoyo_obj_info *obj);
1054 void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns);
1055 void tomoyo_load_policy(const char *filename);
1056 void tomoyo_normalize_line(unsigned char *buffer);
1057 void tomoyo_notify_gc(struct tomoyo_io_buffer *head, const bool is_register);
1058 void tomoyo_print_ip(char *buf, const unsigned int size,
1059 		     const struct tomoyo_ipaddr_union *ptr);
1060 void tomoyo_print_ulong(char *buffer, const int buffer_len,
1061 			const unsigned long value, const u8 type);
1062 void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
1063 void tomoyo_put_number_union(struct tomoyo_number_union *ptr);
1064 void tomoyo_read_log(struct tomoyo_io_buffer *head);
1065 void tomoyo_update_stat(const u8 index);
1066 void tomoyo_warn_oom(const char *function);
1067 void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
1068 	__printf(2, 3);
1069 void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
1070 		       va_list args);
1071 
1072 /********** External variable definitions. **********/
1073 
1074 extern bool tomoyo_policy_loaded;
1075 extern int tomoyo_enabled;
1076 extern const char * const tomoyo_condition_keyword
1077 [TOMOYO_MAX_CONDITION_KEYWORD];
1078 extern const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
1079 extern const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
1080 					      + TOMOYO_MAX_MAC_CATEGORY_INDEX];
1081 extern const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE];
1082 extern const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION];
1083 extern const char * const tomoyo_proto_keyword[TOMOYO_SOCK_MAX];
1084 extern const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION];
1085 extern const u8 tomoyo_index2category[TOMOYO_MAX_MAC_INDEX];
1086 extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
1087 extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
1088 extern const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION];
1089 extern struct list_head tomoyo_condition_list;
1090 extern struct list_head tomoyo_domain_list;
1091 extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
1092 extern struct list_head tomoyo_namespace_list;
1093 extern struct mutex tomoyo_policy_lock;
1094 extern struct srcu_struct tomoyo_ss;
1095 extern struct tomoyo_domain_info tomoyo_kernel_domain;
1096 extern struct tomoyo_policy_namespace tomoyo_kernel_namespace;
1097 extern unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
1098 extern unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
1099 extern struct lsm_blob_sizes tomoyo_blob_sizes;
1100 
1101 /********** Inlined functions. **********/
1102 
1103 /**
1104  * tomoyo_read_lock - Take lock for protecting policy.
1105  *
1106  * Returns index number for tomoyo_read_unlock().
1107  */
tomoyo_read_lock(void)1108 static inline int tomoyo_read_lock(void)
1109 {
1110 	return srcu_read_lock(&tomoyo_ss);
1111 }
1112 
1113 /**
1114  * tomoyo_read_unlock - Release lock for protecting policy.
1115  *
1116  * @idx: Index number returned by tomoyo_read_lock().
1117  *
1118  * Returns nothing.
1119  */
tomoyo_read_unlock(int idx)1120 static inline void tomoyo_read_unlock(int idx)
1121 {
1122 	srcu_read_unlock(&tomoyo_ss, idx);
1123 }
1124 
1125 /**
1126  * tomoyo_sys_getppid - Copy of getppid().
1127  *
1128  * Returns parent process's PID.
1129  *
1130  * Alpha does not have getppid() defined. To be able to build this module on
1131  * Alpha, I have to copy getppid() from kernel/timer.c.
1132  */
tomoyo_sys_getppid(void)1133 static inline pid_t tomoyo_sys_getppid(void)
1134 {
1135 	pid_t pid;
1136 
1137 	rcu_read_lock();
1138 	pid = task_tgid_vnr(rcu_dereference(current->real_parent));
1139 	rcu_read_unlock();
1140 	return pid;
1141 }
1142 
1143 /**
1144  * tomoyo_sys_getpid - Copy of getpid().
1145  *
1146  * Returns current thread's PID.
1147  *
1148  * Alpha does not have getpid() defined. To be able to build this module on
1149  * Alpha, I have to copy getpid() from kernel/timer.c.
1150  */
tomoyo_sys_getpid(void)1151 static inline pid_t tomoyo_sys_getpid(void)
1152 {
1153 	return task_tgid_vnr(current);
1154 }
1155 
1156 /**
1157  * tomoyo_pathcmp - strcmp() for "struct tomoyo_path_info" structure.
1158  *
1159  * @a: Pointer to "struct tomoyo_path_info".
1160  * @b: Pointer to "struct tomoyo_path_info".
1161  *
1162  * Returns true if @a == @b, false otherwise.
1163  */
tomoyo_pathcmp(const struct tomoyo_path_info * a,const struct tomoyo_path_info * b)1164 static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a,
1165 				  const struct tomoyo_path_info *b)
1166 {
1167 	return a->hash != b->hash || strcmp(a->name, b->name);
1168 }
1169 
1170 /**
1171  * tomoyo_put_name - Drop reference on "struct tomoyo_name".
1172  *
1173  * @name: Pointer to "struct tomoyo_path_info". Maybe NULL.
1174  *
1175  * Returns nothing.
1176  */
tomoyo_put_name(const struct tomoyo_path_info * name)1177 static inline void tomoyo_put_name(const struct tomoyo_path_info *name)
1178 {
1179 	if (name) {
1180 		struct tomoyo_name *ptr =
1181 			container_of(name, typeof(*ptr), entry);
1182 		atomic_dec(&ptr->head.users);
1183 	}
1184 }
1185 
1186 /**
1187  * tomoyo_put_condition - Drop reference on "struct tomoyo_condition".
1188  *
1189  * @cond: Pointer to "struct tomoyo_condition". Maybe NULL.
1190  *
1191  * Returns nothing.
1192  */
tomoyo_put_condition(struct tomoyo_condition * cond)1193 static inline void tomoyo_put_condition(struct tomoyo_condition *cond)
1194 {
1195 	if (cond)
1196 		atomic_dec(&cond->head.users);
1197 }
1198 
1199 /**
1200  * tomoyo_put_group - Drop reference on "struct tomoyo_group".
1201  *
1202  * @group: Pointer to "struct tomoyo_group". Maybe NULL.
1203  *
1204  * Returns nothing.
1205  */
tomoyo_put_group(struct tomoyo_group * group)1206 static inline void tomoyo_put_group(struct tomoyo_group *group)
1207 {
1208 	if (group)
1209 		atomic_dec(&group->head.users);
1210 }
1211 
1212 /**
1213  * tomoyo_task - Get "struct tomoyo_task" for specified thread.
1214  *
1215  * @task - Pointer to "struct task_struct".
1216  *
1217  * Returns pointer to "struct tomoyo_task" for specified thread.
1218  */
tomoyo_task(struct task_struct * task)1219 static inline struct tomoyo_task *tomoyo_task(struct task_struct *task)
1220 {
1221 	return task->security + tomoyo_blob_sizes.lbs_task;
1222 }
1223 
1224 /**
1225  * tomoyo_same_name_union - Check for duplicated "struct tomoyo_name_union" entry.
1226  *
1227  * @a: Pointer to "struct tomoyo_name_union".
1228  * @b: Pointer to "struct tomoyo_name_union".
1229  *
1230  * Returns true if @a == @b, false otherwise.
1231  */
tomoyo_same_name_union(const struct tomoyo_name_union * a,const struct tomoyo_name_union * b)1232 static inline bool tomoyo_same_name_union
1233 (const struct tomoyo_name_union *a, const struct tomoyo_name_union *b)
1234 {
1235 	return a->filename == b->filename && a->group == b->group;
1236 }
1237 
1238 /**
1239  * tomoyo_same_number_union - Check for duplicated "struct tomoyo_number_union" entry.
1240  *
1241  * @a: Pointer to "struct tomoyo_number_union".
1242  * @b: Pointer to "struct tomoyo_number_union".
1243  *
1244  * Returns true if @a == @b, false otherwise.
1245  */
tomoyo_same_number_union(const struct tomoyo_number_union * a,const struct tomoyo_number_union * b)1246 static inline bool tomoyo_same_number_union
1247 (const struct tomoyo_number_union *a, const struct tomoyo_number_union *b)
1248 {
1249 	return a->values[0] == b->values[0] && a->values[1] == b->values[1] &&
1250 		a->group == b->group && a->value_type[0] == b->value_type[0] &&
1251 		a->value_type[1] == b->value_type[1];
1252 }
1253 
1254 /**
1255  * tomoyo_same_ipaddr_union - Check for duplicated "struct tomoyo_ipaddr_union" entry.
1256  *
1257  * @a: Pointer to "struct tomoyo_ipaddr_union".
1258  * @b: Pointer to "struct tomoyo_ipaddr_union".
1259  *
1260  * Returns true if @a == @b, false otherwise.
1261  */
tomoyo_same_ipaddr_union(const struct tomoyo_ipaddr_union * a,const struct tomoyo_ipaddr_union * b)1262 static inline bool tomoyo_same_ipaddr_union
1263 (const struct tomoyo_ipaddr_union *a, const struct tomoyo_ipaddr_union *b)
1264 {
1265 	return !memcmp(a->ip, b->ip, sizeof(a->ip)) && a->group == b->group &&
1266 		a->is_ipv6 == b->is_ipv6;
1267 }
1268 
1269 /**
1270  * tomoyo_current_namespace - Get "struct tomoyo_policy_namespace" for current thread.
1271  *
1272  * Returns pointer to "struct tomoyo_policy_namespace" for current thread.
1273  */
tomoyo_current_namespace(void)1274 static inline struct tomoyo_policy_namespace *tomoyo_current_namespace(void)
1275 {
1276 	return tomoyo_domain()->ns;
1277 }
1278 
1279 #if defined(CONFIG_SLOB)
1280 
1281 /**
1282  * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
1283  *
1284  * @size: Size to be rounded up.
1285  *
1286  * Returns @size.
1287  *
1288  * Since SLOB does not round up, this function simply returns @size.
1289  */
tomoyo_round2(size_t size)1290 static inline int tomoyo_round2(size_t size)
1291 {
1292 	return size;
1293 }
1294 
1295 #else
1296 
1297 /**
1298  * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
1299  *
1300  * @size: Size to be rounded up.
1301  *
1302  * Returns rounded size.
1303  *
1304  * Strictly speaking, SLAB may be able to allocate (e.g.) 96 bytes instead of
1305  * (e.g.) 128 bytes.
1306  */
tomoyo_round2(size_t size)1307 static inline int tomoyo_round2(size_t size)
1308 {
1309 #if PAGE_SIZE == 4096
1310 	size_t bsize = 32;
1311 #else
1312 	size_t bsize = 64;
1313 #endif
1314 	if (!size)
1315 		return 0;
1316 	while (size > bsize)
1317 		bsize <<= 1;
1318 	return bsize;
1319 }
1320 
1321 #endif
1322 
1323 /**
1324  * list_for_each_cookie - iterate over a list with cookie.
1325  * @pos:        the &struct list_head to use as a loop cursor.
1326  * @head:       the head for your list.
1327  */
1328 #define list_for_each_cookie(pos, head)					\
1329 	if (!pos)							\
1330 		pos =  srcu_dereference((head)->next, &tomoyo_ss);	\
1331 	for ( ; pos != (head); pos = srcu_dereference(pos->next, &tomoyo_ss))
1332 
1333 #endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */
1334