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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". */
69enum 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(). */
138enum 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. */
148enum 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. */
160enum 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. */
176enum 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. */
190enum 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. */
200enum 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. */
208enum 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. */
216enum 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. */
228enum 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. */
241enum 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. */
257enum tomoyo_memory_stat_type {
258 TOMOYO_MEMORY_POLICY,
259 TOMOYO_MEMORY_AUDIT,
260 TOMOYO_MEMORY_QUERY,
261 TOMOYO_MAX_MEMORY_STAT
262};
263
264enum 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. */
271enum 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. */
280enum 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. */
288enum 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. */
301enum 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. */
314enum 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. */
326enum 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. */
370enum 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. */
387enum 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. */
397enum 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. */
406struct 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. */
412struct tomoyo_shared_acl_head {
413 struct list_head list;
414 atomic_t users;
415} __packed;
416
417struct tomoyo_policy_namespace;
418
419/* Structure for request info. */
420struct 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. */
504struct 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. */
513struct tomoyo_name {
514 struct tomoyo_shared_acl_head head;
515 struct tomoyo_path_info entry;
516};
517
518/* Structure for holding a word. */
519struct 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. */
526struct 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. */
534struct 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. */
541struct 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. */
548struct 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. */
554struct tomoyo_number_group {
555 struct tomoyo_acl_head head;
556 struct tomoyo_number_union number;
557};
558
559/* Structure for "address_group" directive. */
560struct 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. */
567struct 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". */
577struct 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. */
583struct 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[]. */
607struct tomoyo_argv {
608 unsigned long index;
609 const struct tomoyo_path_info *value;
610 bool is_not;
611};
612
613/* Structure for envp[]. */
614struct 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. */
621struct 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". */
633struct 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. */
652struct 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. */
672struct 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. */
680struct 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 */
698struct 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 */
709struct 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 */
719struct 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. */
728struct 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 */
740struct 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. */
748struct 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. */
757struct 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. */
763struct 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. */
772struct 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. */
780struct 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 */
793struct 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 */
849struct 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. */
859struct 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. */
866struct 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
872struct 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. */
880struct 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. */
892struct 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. */
902struct 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. */
920struct tomoyo_task {
921 struct tomoyo_domain_info *domain_info;
922 struct tomoyo_domain_info *old_domain_info;
923};
924
925/********** Function prototypes. **********/
926
927bool tomoyo_address_matches_group(const bool is_ipv6, const __be32 *address,
928 const struct tomoyo_group *group);
929bool tomoyo_compare_number_union(const unsigned long value,
930 const struct tomoyo_number_union *ptr);
931bool tomoyo_condition(struct tomoyo_request_info *r,
932 const struct tomoyo_condition *cond);
933bool tomoyo_correct_domain(const unsigned char *domainname);
934bool tomoyo_correct_path(const char *filename);
935bool tomoyo_correct_word(const char *string);
936bool tomoyo_domain_def(const unsigned char *buffer);
937bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
938bool tomoyo_dump_page(struct linux_binprm *bprm, unsigned long pos,
939 struct tomoyo_page_dump *dump);
940bool tomoyo_memory_ok(void *ptr);
941bool tomoyo_number_matches_group(const unsigned long min,
942 const unsigned long max,
943 const struct tomoyo_group *group);
944bool tomoyo_parse_ipaddr_union(struct tomoyo_acl_param *param,
945 struct tomoyo_ipaddr_union *ptr);
946bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
947 struct tomoyo_name_union *ptr);
948bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
949 struct tomoyo_number_union *ptr);
950bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
951 const struct tomoyo_path_info *pattern);
952bool tomoyo_permstr(const char *string, const char *keyword);
953bool tomoyo_str_starts(char **src, const char *find);
954char *tomoyo_encode(const char *str);
955char *tomoyo_encode2(const char *str, int str_len);
956char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
957 va_list args);
958char *tomoyo_read_token(struct tomoyo_acl_param *param);
959char *tomoyo_realpath_from_path(const struct path *path);
960char *tomoyo_realpath_nofollow(const char *pathname);
961const char *tomoyo_get_exe(void);
962const struct tomoyo_path_info *tomoyo_compare_name_union
963(const struct tomoyo_path_info *name, const struct tomoyo_name_union *ptr);
964const struct tomoyo_path_info *tomoyo_get_domainname
965(struct tomoyo_acl_param *param);
966const struct tomoyo_path_info *tomoyo_get_name(const char *name);
967const struct tomoyo_path_info *tomoyo_path_matches_group
968(const struct tomoyo_path_info *pathname, const struct tomoyo_group *group);
969int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
970 const struct path *path, const int flag);
971void tomoyo_close_control(struct tomoyo_io_buffer *head);
972int tomoyo_env_perm(struct tomoyo_request_info *r, const char *env);
973int tomoyo_execute_permission(struct tomoyo_request_info *r,
974 const struct tomoyo_path_info *filename);
975int tomoyo_find_next_domain(struct linux_binprm *bprm);
976int tomoyo_get_mode(const struct tomoyo_policy_namespace *ns, const u8 profile,
977 const u8 index);
978int tomoyo_init_request_info(struct tomoyo_request_info *r,
979 struct tomoyo_domain_info *domain,
980 const u8 index);
981int tomoyo_mkdev_perm(const u8 operation, const struct path *path,
982 const unsigned int mode, unsigned int dev);
983int tomoyo_mount_permission(const char *dev_name, const struct path *path,
984 const char *type, unsigned long flags,
985 void *data_page);
986int tomoyo_open_control(const u8 type, struct file *file);
987int tomoyo_path2_perm(const u8 operation, const struct path *path1,
988 const struct path *path2);
989int tomoyo_path_number_perm(const u8 operation, const struct path *path,
990 unsigned long number);
991int 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);
995int tomoyo_socket_bind_permission(struct socket *sock, struct sockaddr *addr,
996 int addr_len);
997int tomoyo_socket_connect_permission(struct socket *sock,
998 struct sockaddr *addr, int addr_len);
999int tomoyo_socket_listen_permission(struct socket *sock);
1000int tomoyo_socket_sendmsg_permission(struct socket *sock, struct msghdr *msg,
1001 int size);
1002int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
1003 __printf(2, 3);
1004int 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));
1012int 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 *));
1017int tomoyo_write_aggregator(struct tomoyo_acl_param *param);
1018int tomoyo_write_file(struct tomoyo_acl_param *param);
1019int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type);
1020int tomoyo_write_misc(struct tomoyo_acl_param *param);
1021int tomoyo_write_inet_network(struct tomoyo_acl_param *param);
1022int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
1023 const u8 type);
1024int tomoyo_write_unix_network(struct tomoyo_acl_param *param);
1025ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
1026 const int buffer_len);
1027ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
1028 const char __user *buffer, const int buffer_len);
1029struct tomoyo_condition *tomoyo_get_condition(struct tomoyo_acl_param *param);
1030struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
1031 const bool transit);
1032struct tomoyo_domain_info *tomoyo_domain(void);
1033struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
1034struct tomoyo_group *tomoyo_get_group(struct tomoyo_acl_param *param,
1035 const u8 idx);
1036struct tomoyo_policy_namespace *tomoyo_assign_namespace
1037(const char *domainname);
1038struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
1039 const u8 profile);
1040unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
1041 const u8 index);
1042u8 tomoyo_parse_ulong(unsigned long *result, char **str);
1043void *tomoyo_commit_ok(void *data, const unsigned int size);
1044void __init tomoyo_load_builtin_policy(void);
1045void __init tomoyo_mm_init(void);
1046void tomoyo_check_acl(struct tomoyo_request_info *r,
1047 bool (*check_entry)(struct tomoyo_request_info *,
1048 const struct tomoyo_acl_info *));
1049void tomoyo_check_profile(void);
1050void tomoyo_convert_time(time64_t time, struct tomoyo_time *stamp);
1051void tomoyo_del_condition(struct list_head *element);
1052void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
1053void tomoyo_get_attributes(struct tomoyo_obj_info *obj);
1054void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns);
1055void tomoyo_load_policy(const char *filename);
1056void tomoyo_normalize_line(unsigned char *buffer);
1057void tomoyo_notify_gc(struct tomoyo_io_buffer *head, const bool is_register);
1058void tomoyo_print_ip(char *buf, const unsigned int size,
1059 const struct tomoyo_ipaddr_union *ptr);
1060void tomoyo_print_ulong(char *buffer, const int buffer_len,
1061 const unsigned long value, const u8 type);
1062void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
1063void tomoyo_put_number_union(struct tomoyo_number_union *ptr);
1064void tomoyo_read_log(struct tomoyo_io_buffer *head);
1065void tomoyo_update_stat(const u8 index);
1066void tomoyo_warn_oom(const char *function);
1067void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
1068 __printf(2, 3);
1069void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
1070 va_list args);
1071
1072/********** External variable definitions. **********/
1073
1074extern bool tomoyo_policy_loaded;
1075extern int tomoyo_enabled;
1076extern const char * const tomoyo_condition_keyword
1077[TOMOYO_MAX_CONDITION_KEYWORD];
1078extern const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
1079extern const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
1080 + TOMOYO_MAX_MAC_CATEGORY_INDEX];
1081extern const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE];
1082extern const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION];
1083extern const char * const tomoyo_proto_keyword[TOMOYO_SOCK_MAX];
1084extern const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION];
1085extern const u8 tomoyo_index2category[TOMOYO_MAX_MAC_INDEX];
1086extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
1087extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
1088extern const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION];
1089extern struct list_head tomoyo_condition_list;
1090extern struct list_head tomoyo_domain_list;
1091extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
1092extern struct list_head tomoyo_namespace_list;
1093extern struct mutex tomoyo_policy_lock;
1094extern struct srcu_struct tomoyo_ss;
1095extern struct tomoyo_domain_info tomoyo_kernel_domain;
1096extern struct tomoyo_policy_namespace tomoyo_kernel_namespace;
1097extern unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
1098extern unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
1099extern 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 */
1108static 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 */
1120static 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 */
1133static 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 */
1151static 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 */
1164static 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 */
1177static 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 */
1193static 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 */
1206static 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 */
1219static 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 */
1232static 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 */
1246static 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 */
1262static 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 */
1274static 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 */
1290static 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 */
1307static 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) */
1/*
2 * security/tomoyo/common.h
3 *
4 * Header file for TOMOYO.
5 *
6 * Copyright (C) 2005-2010 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
27/********** Constants definitions. **********/
28
29/*
30 * TOMOYO uses this hash only when appending a string into the string
31 * table. Frequency of appending strings is very low. So we don't need
32 * large (e.g. 64k) hash size. 256 will be sufficient.
33 */
34#define TOMOYO_HASH_BITS 8
35#define TOMOYO_MAX_HASH (1u<<TOMOYO_HASH_BITS)
36
37#define TOMOYO_EXEC_TMPSIZE 4096
38
39/* Profile number is an integer between 0 and 255. */
40#define TOMOYO_MAX_PROFILES 256
41
42/* Group number is an integer between 0 and 255. */
43#define TOMOYO_MAX_ACL_GROUPS 256
44
45/* Index numbers for "struct tomoyo_condition". */
46enum tomoyo_conditions_index {
47 TOMOYO_TASK_UID, /* current_uid() */
48 TOMOYO_TASK_EUID, /* current_euid() */
49 TOMOYO_TASK_SUID, /* current_suid() */
50 TOMOYO_TASK_FSUID, /* current_fsuid() */
51 TOMOYO_TASK_GID, /* current_gid() */
52 TOMOYO_TASK_EGID, /* current_egid() */
53 TOMOYO_TASK_SGID, /* current_sgid() */
54 TOMOYO_TASK_FSGID, /* current_fsgid() */
55 TOMOYO_TASK_PID, /* sys_getpid() */
56 TOMOYO_TASK_PPID, /* sys_getppid() */
57 TOMOYO_EXEC_ARGC, /* "struct linux_binprm *"->argc */
58 TOMOYO_EXEC_ENVC, /* "struct linux_binprm *"->envc */
59 TOMOYO_TYPE_IS_SOCKET, /* S_IFSOCK */
60 TOMOYO_TYPE_IS_SYMLINK, /* S_IFLNK */
61 TOMOYO_TYPE_IS_FILE, /* S_IFREG */
62 TOMOYO_TYPE_IS_BLOCK_DEV, /* S_IFBLK */
63 TOMOYO_TYPE_IS_DIRECTORY, /* S_IFDIR */
64 TOMOYO_TYPE_IS_CHAR_DEV, /* S_IFCHR */
65 TOMOYO_TYPE_IS_FIFO, /* S_IFIFO */
66 TOMOYO_MODE_SETUID, /* S_ISUID */
67 TOMOYO_MODE_SETGID, /* S_ISGID */
68 TOMOYO_MODE_STICKY, /* S_ISVTX */
69 TOMOYO_MODE_OWNER_READ, /* S_IRUSR */
70 TOMOYO_MODE_OWNER_WRITE, /* S_IWUSR */
71 TOMOYO_MODE_OWNER_EXECUTE, /* S_IXUSR */
72 TOMOYO_MODE_GROUP_READ, /* S_IRGRP */
73 TOMOYO_MODE_GROUP_WRITE, /* S_IWGRP */
74 TOMOYO_MODE_GROUP_EXECUTE, /* S_IXGRP */
75 TOMOYO_MODE_OTHERS_READ, /* S_IROTH */
76 TOMOYO_MODE_OTHERS_WRITE, /* S_IWOTH */
77 TOMOYO_MODE_OTHERS_EXECUTE, /* S_IXOTH */
78 TOMOYO_EXEC_REALPATH,
79 TOMOYO_SYMLINK_TARGET,
80 TOMOYO_PATH1_UID,
81 TOMOYO_PATH1_GID,
82 TOMOYO_PATH1_INO,
83 TOMOYO_PATH1_MAJOR,
84 TOMOYO_PATH1_MINOR,
85 TOMOYO_PATH1_PERM,
86 TOMOYO_PATH1_TYPE,
87 TOMOYO_PATH1_DEV_MAJOR,
88 TOMOYO_PATH1_DEV_MINOR,
89 TOMOYO_PATH2_UID,
90 TOMOYO_PATH2_GID,
91 TOMOYO_PATH2_INO,
92 TOMOYO_PATH2_MAJOR,
93 TOMOYO_PATH2_MINOR,
94 TOMOYO_PATH2_PERM,
95 TOMOYO_PATH2_TYPE,
96 TOMOYO_PATH2_DEV_MAJOR,
97 TOMOYO_PATH2_DEV_MINOR,
98 TOMOYO_PATH1_PARENT_UID,
99 TOMOYO_PATH1_PARENT_GID,
100 TOMOYO_PATH1_PARENT_INO,
101 TOMOYO_PATH1_PARENT_PERM,
102 TOMOYO_PATH2_PARENT_UID,
103 TOMOYO_PATH2_PARENT_GID,
104 TOMOYO_PATH2_PARENT_INO,
105 TOMOYO_PATH2_PARENT_PERM,
106 TOMOYO_MAX_CONDITION_KEYWORD,
107 TOMOYO_NUMBER_UNION,
108 TOMOYO_NAME_UNION,
109 TOMOYO_ARGV_ENTRY,
110 TOMOYO_ENVP_ENTRY,
111};
112
113
114/* Index numbers for stat(). */
115enum tomoyo_path_stat_index {
116 /* Do not change this order. */
117 TOMOYO_PATH1,
118 TOMOYO_PATH1_PARENT,
119 TOMOYO_PATH2,
120 TOMOYO_PATH2_PARENT,
121 TOMOYO_MAX_PATH_STAT
122};
123
124/* Index numbers for operation mode. */
125enum tomoyo_mode_index {
126 TOMOYO_CONFIG_DISABLED,
127 TOMOYO_CONFIG_LEARNING,
128 TOMOYO_CONFIG_PERMISSIVE,
129 TOMOYO_CONFIG_ENFORCING,
130 TOMOYO_CONFIG_MAX_MODE,
131 TOMOYO_CONFIG_WANT_REJECT_LOG = 64,
132 TOMOYO_CONFIG_WANT_GRANT_LOG = 128,
133 TOMOYO_CONFIG_USE_DEFAULT = 255,
134};
135
136/* Index numbers for entry type. */
137enum tomoyo_policy_id {
138 TOMOYO_ID_GROUP,
139 TOMOYO_ID_PATH_GROUP,
140 TOMOYO_ID_NUMBER_GROUP,
141 TOMOYO_ID_TRANSITION_CONTROL,
142 TOMOYO_ID_AGGREGATOR,
143 TOMOYO_ID_MANAGER,
144 TOMOYO_ID_CONDITION,
145 TOMOYO_ID_NAME,
146 TOMOYO_ID_ACL,
147 TOMOYO_ID_DOMAIN,
148 TOMOYO_MAX_POLICY
149};
150
151/* Index numbers for domain's attributes. */
152enum tomoyo_domain_info_flags_index {
153 /* Quota warnning flag. */
154 TOMOYO_DIF_QUOTA_WARNED,
155 /*
156 * This domain was unable to create a new domain at
157 * tomoyo_find_next_domain() because the name of the domain to be
158 * created was too long or it could not allocate memory.
159 * More than one process continued execve() without domain transition.
160 */
161 TOMOYO_DIF_TRANSITION_FAILED,
162 TOMOYO_MAX_DOMAIN_INFO_FLAGS
163};
164
165/* Index numbers for group entries. */
166enum tomoyo_group_id {
167 TOMOYO_PATH_GROUP,
168 TOMOYO_NUMBER_GROUP,
169 TOMOYO_MAX_GROUP
170};
171
172/* Index numbers for type of numeric values. */
173enum tomoyo_value_type {
174 TOMOYO_VALUE_TYPE_INVALID,
175 TOMOYO_VALUE_TYPE_DECIMAL,
176 TOMOYO_VALUE_TYPE_OCTAL,
177 TOMOYO_VALUE_TYPE_HEXADECIMAL,
178};
179
180/* Index numbers for domain transition control keywords. */
181enum tomoyo_transition_type {
182 /* Do not change this order, */
183 TOMOYO_TRANSITION_CONTROL_NO_RESET,
184 TOMOYO_TRANSITION_CONTROL_RESET,
185 TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE,
186 TOMOYO_TRANSITION_CONTROL_INITIALIZE,
187 TOMOYO_TRANSITION_CONTROL_NO_KEEP,
188 TOMOYO_TRANSITION_CONTROL_KEEP,
189 TOMOYO_MAX_TRANSITION_TYPE
190};
191
192/* Index numbers for Access Controls. */
193enum tomoyo_acl_entry_type_index {
194 TOMOYO_TYPE_PATH_ACL,
195 TOMOYO_TYPE_PATH2_ACL,
196 TOMOYO_TYPE_PATH_NUMBER_ACL,
197 TOMOYO_TYPE_MKDEV_ACL,
198 TOMOYO_TYPE_MOUNT_ACL,
199};
200
201/* Index numbers for access controls with one pathname. */
202enum tomoyo_path_acl_index {
203 TOMOYO_TYPE_EXECUTE,
204 TOMOYO_TYPE_READ,
205 TOMOYO_TYPE_WRITE,
206 TOMOYO_TYPE_APPEND,
207 TOMOYO_TYPE_UNLINK,
208 TOMOYO_TYPE_GETATTR,
209 TOMOYO_TYPE_RMDIR,
210 TOMOYO_TYPE_TRUNCATE,
211 TOMOYO_TYPE_SYMLINK,
212 TOMOYO_TYPE_CHROOT,
213 TOMOYO_TYPE_UMOUNT,
214 TOMOYO_MAX_PATH_OPERATION
215};
216
217/* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
218enum tomoyo_memory_stat_type {
219 TOMOYO_MEMORY_POLICY,
220 TOMOYO_MEMORY_AUDIT,
221 TOMOYO_MEMORY_QUERY,
222 TOMOYO_MAX_MEMORY_STAT
223};
224
225enum tomoyo_mkdev_acl_index {
226 TOMOYO_TYPE_MKBLOCK,
227 TOMOYO_TYPE_MKCHAR,
228 TOMOYO_MAX_MKDEV_OPERATION
229};
230
231/* Index numbers for access controls with two pathnames. */
232enum tomoyo_path2_acl_index {
233 TOMOYO_TYPE_LINK,
234 TOMOYO_TYPE_RENAME,
235 TOMOYO_TYPE_PIVOT_ROOT,
236 TOMOYO_MAX_PATH2_OPERATION
237};
238
239/* Index numbers for access controls with one pathname and one number. */
240enum tomoyo_path_number_acl_index {
241 TOMOYO_TYPE_CREATE,
242 TOMOYO_TYPE_MKDIR,
243 TOMOYO_TYPE_MKFIFO,
244 TOMOYO_TYPE_MKSOCK,
245 TOMOYO_TYPE_IOCTL,
246 TOMOYO_TYPE_CHMOD,
247 TOMOYO_TYPE_CHOWN,
248 TOMOYO_TYPE_CHGRP,
249 TOMOYO_MAX_PATH_NUMBER_OPERATION
250};
251
252/* Index numbers for /sys/kernel/security/tomoyo/ interfaces. */
253enum tomoyo_securityfs_interface_index {
254 TOMOYO_DOMAINPOLICY,
255 TOMOYO_EXCEPTIONPOLICY,
256 TOMOYO_PROCESS_STATUS,
257 TOMOYO_STAT,
258 TOMOYO_SELFDOMAIN,
259 TOMOYO_AUDIT,
260 TOMOYO_VERSION,
261 TOMOYO_PROFILE,
262 TOMOYO_QUERY,
263 TOMOYO_MANAGER
264};
265
266/* Index numbers for special mount operations. */
267enum tomoyo_special_mount {
268 TOMOYO_MOUNT_BIND, /* mount --bind /source /dest */
269 TOMOYO_MOUNT_MOVE, /* mount --move /old /new */
270 TOMOYO_MOUNT_REMOUNT, /* mount -o remount /dir */
271 TOMOYO_MOUNT_MAKE_UNBINDABLE, /* mount --make-unbindable /dir */
272 TOMOYO_MOUNT_MAKE_PRIVATE, /* mount --make-private /dir */
273 TOMOYO_MOUNT_MAKE_SLAVE, /* mount --make-slave /dir */
274 TOMOYO_MOUNT_MAKE_SHARED, /* mount --make-shared /dir */
275 TOMOYO_MAX_SPECIAL_MOUNT
276};
277
278/* Index numbers for functionality. */
279enum tomoyo_mac_index {
280 TOMOYO_MAC_FILE_EXECUTE,
281 TOMOYO_MAC_FILE_OPEN,
282 TOMOYO_MAC_FILE_CREATE,
283 TOMOYO_MAC_FILE_UNLINK,
284 TOMOYO_MAC_FILE_GETATTR,
285 TOMOYO_MAC_FILE_MKDIR,
286 TOMOYO_MAC_FILE_RMDIR,
287 TOMOYO_MAC_FILE_MKFIFO,
288 TOMOYO_MAC_FILE_MKSOCK,
289 TOMOYO_MAC_FILE_TRUNCATE,
290 TOMOYO_MAC_FILE_SYMLINK,
291 TOMOYO_MAC_FILE_MKBLOCK,
292 TOMOYO_MAC_FILE_MKCHAR,
293 TOMOYO_MAC_FILE_LINK,
294 TOMOYO_MAC_FILE_RENAME,
295 TOMOYO_MAC_FILE_CHMOD,
296 TOMOYO_MAC_FILE_CHOWN,
297 TOMOYO_MAC_FILE_CHGRP,
298 TOMOYO_MAC_FILE_IOCTL,
299 TOMOYO_MAC_FILE_CHROOT,
300 TOMOYO_MAC_FILE_MOUNT,
301 TOMOYO_MAC_FILE_UMOUNT,
302 TOMOYO_MAC_FILE_PIVOT_ROOT,
303 TOMOYO_MAX_MAC_INDEX
304};
305
306/* Index numbers for category of functionality. */
307enum tomoyo_mac_category_index {
308 TOMOYO_MAC_CATEGORY_FILE,
309 TOMOYO_MAX_MAC_CATEGORY_INDEX
310};
311
312/*
313 * Retry this request. Returned by tomoyo_supervisor() if policy violation has
314 * occurred in enforcing mode and the userspace daemon decided to retry.
315 *
316 * We must choose a positive value in order to distinguish "granted" (which is
317 * 0) and "rejected" (which is a negative value) and "retry".
318 */
319#define TOMOYO_RETRY_REQUEST 1
320
321/* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
322enum tomoyo_policy_stat_type {
323 /* Do not change this order. */
324 TOMOYO_STAT_POLICY_UPDATES,
325 TOMOYO_STAT_POLICY_LEARNING, /* == TOMOYO_CONFIG_LEARNING */
326 TOMOYO_STAT_POLICY_PERMISSIVE, /* == TOMOYO_CONFIG_PERMISSIVE */
327 TOMOYO_STAT_POLICY_ENFORCING, /* == TOMOYO_CONFIG_ENFORCING */
328 TOMOYO_MAX_POLICY_STAT
329};
330
331/* Index numbers for profile's PREFERENCE values. */
332enum tomoyo_pref_index {
333 TOMOYO_PREF_MAX_AUDIT_LOG,
334 TOMOYO_PREF_MAX_LEARNING_ENTRY,
335 TOMOYO_MAX_PREF
336};
337
338/********** Structure definitions. **********/
339
340/* Common header for holding ACL entries. */
341struct tomoyo_acl_head {
342 struct list_head list;
343 bool is_deleted;
344} __packed;
345
346/* Common header for shared entries. */
347struct tomoyo_shared_acl_head {
348 struct list_head list;
349 atomic_t users;
350} __packed;
351
352struct tomoyo_policy_namespace;
353
354/* Structure for request info. */
355struct tomoyo_request_info {
356 /*
357 * For holding parameters specific to operations which deal files.
358 * NULL if not dealing files.
359 */
360 struct tomoyo_obj_info *obj;
361 /*
362 * For holding parameters specific to execve() request.
363 * NULL if not dealing do_execve().
364 */
365 struct tomoyo_execve *ee;
366 struct tomoyo_domain_info *domain;
367 /* For holding parameters. */
368 union {
369 struct {
370 const struct tomoyo_path_info *filename;
371 /* For using wildcards at tomoyo_find_next_domain(). */
372 const struct tomoyo_path_info *matched_path;
373 /* One of values in "enum tomoyo_path_acl_index". */
374 u8 operation;
375 } path;
376 struct {
377 const struct tomoyo_path_info *filename1;
378 const struct tomoyo_path_info *filename2;
379 /* One of values in "enum tomoyo_path2_acl_index". */
380 u8 operation;
381 } path2;
382 struct {
383 const struct tomoyo_path_info *filename;
384 unsigned int mode;
385 unsigned int major;
386 unsigned int minor;
387 /* One of values in "enum tomoyo_mkdev_acl_index". */
388 u8 operation;
389 } mkdev;
390 struct {
391 const struct tomoyo_path_info *filename;
392 unsigned long number;
393 /*
394 * One of values in
395 * "enum tomoyo_path_number_acl_index".
396 */
397 u8 operation;
398 } path_number;
399 struct {
400 const struct tomoyo_path_info *type;
401 const struct tomoyo_path_info *dir;
402 const struct tomoyo_path_info *dev;
403 unsigned long flags;
404 int need_dev;
405 } mount;
406 } param;
407 u8 param_type;
408 bool granted;
409 u8 retry;
410 u8 profile;
411 u8 mode; /* One of tomoyo_mode_index . */
412 u8 type;
413};
414
415/* Structure for holding a token. */
416struct tomoyo_path_info {
417 const char *name;
418 u32 hash; /* = full_name_hash(name, strlen(name)) */
419 u16 const_len; /* = tomoyo_const_part_length(name) */
420 bool is_dir; /* = tomoyo_strendswith(name, "/") */
421 bool is_patterned; /* = tomoyo_path_contains_pattern(name) */
422};
423
424/* Structure for holding string data. */
425struct tomoyo_name {
426 struct tomoyo_shared_acl_head head;
427 struct tomoyo_path_info entry;
428};
429
430/* Structure for holding a word. */
431struct tomoyo_name_union {
432 /* Either @filename or @group is NULL. */
433 const struct tomoyo_path_info *filename;
434 struct tomoyo_group *group;
435};
436
437/* Structure for holding a number. */
438struct tomoyo_number_union {
439 unsigned long values[2];
440 struct tomoyo_group *group; /* Maybe NULL. */
441 /* One of values in "enum tomoyo_value_type". */
442 u8 value_type[2];
443};
444
445/* Structure for "path_group"/"number_group" directive. */
446struct tomoyo_group {
447 struct tomoyo_shared_acl_head head;
448 const struct tomoyo_path_info *group_name;
449 struct list_head member_list;
450};
451
452/* Structure for "path_group" directive. */
453struct tomoyo_path_group {
454 struct tomoyo_acl_head head;
455 const struct tomoyo_path_info *member_name;
456};
457
458/* Structure for "number_group" directive. */
459struct tomoyo_number_group {
460 struct tomoyo_acl_head head;
461 struct tomoyo_number_union number;
462};
463
464/* Subset of "struct stat". Used by conditional ACL and audit logs. */
465struct tomoyo_mini_stat {
466 uid_t uid;
467 gid_t gid;
468 ino_t ino;
469 mode_t mode;
470 dev_t dev;
471 dev_t rdev;
472};
473
474/* Structure for dumping argv[] and envp[] of "struct linux_binprm". */
475struct tomoyo_page_dump {
476 struct page *page; /* Previously dumped page. */
477 char *data; /* Contents of "page". Size is PAGE_SIZE. */
478};
479
480/* Structure for attribute checks in addition to pathname checks. */
481struct tomoyo_obj_info {
482 /*
483 * True if tomoyo_get_attributes() was already called, false otherwise.
484 */
485 bool validate_done;
486 /* True if @stat[] is valid. */
487 bool stat_valid[TOMOYO_MAX_PATH_STAT];
488 /* First pathname. Initialized with { NULL, NULL } if no path. */
489 struct path path1;
490 /* Second pathname. Initialized with { NULL, NULL } if no path. */
491 struct path path2;
492 /*
493 * Information on @path1, @path1's parent directory, @path2, @path2's
494 * parent directory.
495 */
496 struct tomoyo_mini_stat stat[TOMOYO_MAX_PATH_STAT];
497 /*
498 * Content of symbolic link to be created. NULL for operations other
499 * than symlink().
500 */
501 struct tomoyo_path_info *symlink_target;
502};
503
504/* Structure for argv[]. */
505struct tomoyo_argv {
506 unsigned long index;
507 const struct tomoyo_path_info *value;
508 bool is_not;
509};
510
511/* Structure for envp[]. */
512struct tomoyo_envp {
513 const struct tomoyo_path_info *name;
514 const struct tomoyo_path_info *value;
515 bool is_not;
516};
517
518/* Structure for execve() operation. */
519struct tomoyo_execve {
520 struct tomoyo_request_info r;
521 struct tomoyo_obj_info obj;
522 struct linux_binprm *bprm;
523 /* For dumping argv[] and envp[]. */
524 struct tomoyo_page_dump dump;
525 /* For temporary use. */
526 char *tmp; /* Size is TOMOYO_EXEC_TMPSIZE bytes */
527};
528
529/* Structure for entries which follows "struct tomoyo_condition". */
530struct tomoyo_condition_element {
531 /*
532 * Left hand operand. A "struct tomoyo_argv" for TOMOYO_ARGV_ENTRY, a
533 * "struct tomoyo_envp" for TOMOYO_ENVP_ENTRY is attached to the tail
534 * of the array of this struct.
535 */
536 u8 left;
537 /*
538 * Right hand operand. A "struct tomoyo_number_union" for
539 * TOMOYO_NUMBER_UNION, a "struct tomoyo_name_union" for
540 * TOMOYO_NAME_UNION is attached to the tail of the array of this
541 * struct.
542 */
543 u8 right;
544 /* Equation operator. True if equals or overlaps, false otherwise. */
545 bool equals;
546};
547
548/* Structure for optional arguments. */
549struct tomoyo_condition {
550 struct tomoyo_shared_acl_head head;
551 u32 size; /* Memory size allocated for this entry. */
552 u16 condc; /* Number of conditions in this struct. */
553 u16 numbers_count; /* Number of "struct tomoyo_number_union values". */
554 u16 names_count; /* Number of "struct tomoyo_name_union names". */
555 u16 argc; /* Number of "struct tomoyo_argv". */
556 u16 envc; /* Number of "struct tomoyo_envp". */
557 /*
558 * struct tomoyo_condition_element condition[condc];
559 * struct tomoyo_number_union values[numbers_count];
560 * struct tomoyo_name_union names[names_count];
561 * struct tomoyo_argv argv[argc];
562 * struct tomoyo_envp envp[envc];
563 */
564};
565
566/* Common header for individual entries. */
567struct tomoyo_acl_info {
568 struct list_head list;
569 struct tomoyo_condition *cond; /* Maybe NULL. */
570 bool is_deleted;
571 u8 type; /* One of values in "enum tomoyo_acl_entry_type_index". */
572} __packed;
573
574/* Structure for domain information. */
575struct tomoyo_domain_info {
576 struct list_head list;
577 struct list_head acl_info_list;
578 /* Name of this domain. Never NULL. */
579 const struct tomoyo_path_info *domainname;
580 /* Namespace for this domain. Never NULL. */
581 struct tomoyo_policy_namespace *ns;
582 u8 profile; /* Profile number to use. */
583 u8 group; /* Group number to use. */
584 bool is_deleted; /* Delete flag. */
585 bool flags[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
586 atomic_t users; /* Number of referring credentials. */
587};
588
589/*
590 * Structure for "file execute", "file read", "file write", "file append",
591 * "file unlink", "file getattr", "file rmdir", "file truncate",
592 * "file symlink", "file chroot" and "file unmount" directive.
593 */
594struct tomoyo_path_acl {
595 struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */
596 u16 perm; /* Bitmask of values in "enum tomoyo_path_acl_index". */
597 struct tomoyo_name_union name;
598};
599
600/*
601 * Structure for "file create", "file mkdir", "file mkfifo", "file mksock",
602 * "file ioctl", "file chmod", "file chown" and "file chgrp" directive.
603 */
604struct tomoyo_path_number_acl {
605 struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_NUMBER_ACL */
606 /* Bitmask of values in "enum tomoyo_path_number_acl_index". */
607 u8 perm;
608 struct tomoyo_name_union name;
609 struct tomoyo_number_union number;
610};
611
612/* Structure for "file mkblock" and "file mkchar" directive. */
613struct tomoyo_mkdev_acl {
614 struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MKDEV_ACL */
615 u8 perm; /* Bitmask of values in "enum tomoyo_mkdev_acl_index". */
616 struct tomoyo_name_union name;
617 struct tomoyo_number_union mode;
618 struct tomoyo_number_union major;
619 struct tomoyo_number_union minor;
620};
621
622/*
623 * Structure for "file rename", "file link" and "file pivot_root" directive.
624 */
625struct tomoyo_path2_acl {
626 struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */
627 u8 perm; /* Bitmask of values in "enum tomoyo_path2_acl_index". */
628 struct tomoyo_name_union name1;
629 struct tomoyo_name_union name2;
630};
631
632/* Structure for "file mount" directive. */
633struct tomoyo_mount_acl {
634 struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MOUNT_ACL */
635 struct tomoyo_name_union dev_name;
636 struct tomoyo_name_union dir_name;
637 struct tomoyo_name_union fs_type;
638 struct tomoyo_number_union flags;
639};
640
641/* Structure for holding a line from /sys/kernel/security/tomoyo/ interface. */
642struct tomoyo_acl_param {
643 char *data;
644 struct list_head *list;
645 struct tomoyo_policy_namespace *ns;
646 bool is_delete;
647};
648
649#define TOMOYO_MAX_IO_READ_QUEUE 64
650
651/*
652 * Structure for reading/writing policy via /sys/kernel/security/tomoyo
653 * interfaces.
654 */
655struct tomoyo_io_buffer {
656 void (*read) (struct tomoyo_io_buffer *);
657 int (*write) (struct tomoyo_io_buffer *);
658 int (*poll) (struct file *file, poll_table *wait);
659 /* Exclusive lock for this structure. */
660 struct mutex io_sem;
661 char __user *read_user_buf;
662 size_t read_user_buf_avail;
663 struct {
664 struct list_head *ns;
665 struct list_head *domain;
666 struct list_head *group;
667 struct list_head *acl;
668 size_t avail;
669 unsigned int step;
670 unsigned int query_index;
671 u16 index;
672 u16 cond_index;
673 u8 acl_group_index;
674 u8 cond_step;
675 u8 bit;
676 u8 w_pos;
677 bool eof;
678 bool print_this_domain_only;
679 bool print_transition_related_only;
680 bool print_cond_part;
681 const char *w[TOMOYO_MAX_IO_READ_QUEUE];
682 } r;
683 struct {
684 struct tomoyo_policy_namespace *ns;
685 /* The position currently writing to. */
686 struct tomoyo_domain_info *domain;
687 /* Bytes available for writing. */
688 size_t avail;
689 bool is_delete;
690 } w;
691 /* Buffer for reading. */
692 char *read_buf;
693 /* Size of read buffer. */
694 size_t readbuf_size;
695 /* Buffer for writing. */
696 char *write_buf;
697 /* Size of write buffer. */
698 size_t writebuf_size;
699 /* Type of this interface. */
700 enum tomoyo_securityfs_interface_index type;
701 /* Users counter protected by tomoyo_io_buffer_list_lock. */
702 u8 users;
703 /* List for telling GC not to kfree() elements. */
704 struct list_head list;
705};
706
707/*
708 * Structure for "initialize_domain"/"no_initialize_domain"/"keep_domain"/
709 * "no_keep_domain" keyword.
710 */
711struct tomoyo_transition_control {
712 struct tomoyo_acl_head head;
713 u8 type; /* One of values in "enum tomoyo_transition_type". */
714 /* True if the domainname is tomoyo_get_last_name(). */
715 bool is_last_name;
716 const struct tomoyo_path_info *domainname; /* Maybe NULL */
717 const struct tomoyo_path_info *program; /* Maybe NULL */
718};
719
720/* Structure for "aggregator" keyword. */
721struct tomoyo_aggregator {
722 struct tomoyo_acl_head head;
723 const struct tomoyo_path_info *original_name;
724 const struct tomoyo_path_info *aggregated_name;
725};
726
727/* Structure for policy manager. */
728struct tomoyo_manager {
729 struct tomoyo_acl_head head;
730 bool is_domain; /* True if manager is a domainname. */
731 /* A path to program or a domainname. */
732 const struct tomoyo_path_info *manager;
733};
734
735struct tomoyo_preference {
736 unsigned int learning_max_entry;
737 bool enforcing_verbose;
738 bool learning_verbose;
739 bool permissive_verbose;
740};
741
742/* Structure for /sys/kernel/security/tomnoyo/profile interface. */
743struct tomoyo_profile {
744 const struct tomoyo_path_info *comment;
745 struct tomoyo_preference *learning;
746 struct tomoyo_preference *permissive;
747 struct tomoyo_preference *enforcing;
748 struct tomoyo_preference preference;
749 u8 default_config;
750 u8 config[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX];
751 unsigned int pref[TOMOYO_MAX_PREF];
752};
753
754/* Structure for representing YYYY/MM/DD hh/mm/ss. */
755struct tomoyo_time {
756 u16 year;
757 u8 month;
758 u8 day;
759 u8 hour;
760 u8 min;
761 u8 sec;
762};
763
764/* Structure for policy namespace. */
765struct tomoyo_policy_namespace {
766 /* Profile table. Memory is allocated as needed. */
767 struct tomoyo_profile *profile_ptr[TOMOYO_MAX_PROFILES];
768 /* List of "struct tomoyo_group". */
769 struct list_head group_list[TOMOYO_MAX_GROUP];
770 /* List of policy. */
771 struct list_head policy_list[TOMOYO_MAX_POLICY];
772 /* The global ACL referred by "use_group" keyword. */
773 struct list_head acl_group[TOMOYO_MAX_ACL_GROUPS];
774 /* List for connecting to tomoyo_namespace_list list. */
775 struct list_head namespace_list;
776 /* Profile version. Currently only 20100903 is defined. */
777 unsigned int profile_version;
778 /* Name of this namespace (e.g. "<kernel>", "</usr/sbin/httpd>" ). */
779 const char *name;
780};
781
782/********** Function prototypes. **********/
783
784bool tomoyo_compare_number_union(const unsigned long value,
785 const struct tomoyo_number_union *ptr);
786bool tomoyo_condition(struct tomoyo_request_info *r,
787 const struct tomoyo_condition *cond);
788bool tomoyo_correct_domain(const unsigned char *domainname);
789bool tomoyo_correct_path(const char *filename);
790bool tomoyo_correct_word(const char *string);
791bool tomoyo_domain_def(const unsigned char *buffer);
792bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
793bool tomoyo_dump_page(struct linux_binprm *bprm, unsigned long pos,
794 struct tomoyo_page_dump *dump);
795bool tomoyo_memory_ok(void *ptr);
796bool tomoyo_number_matches_group(const unsigned long min,
797 const unsigned long max,
798 const struct tomoyo_group *group);
799bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
800 struct tomoyo_name_union *ptr);
801bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
802 struct tomoyo_number_union *ptr);
803bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
804 const struct tomoyo_path_info *pattern);
805bool tomoyo_permstr(const char *string, const char *keyword);
806bool tomoyo_str_starts(char **src, const char *find);
807char *tomoyo_encode(const char *str);
808char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
809 va_list args);
810char *tomoyo_read_token(struct tomoyo_acl_param *param);
811char *tomoyo_realpath_from_path(struct path *path);
812char *tomoyo_realpath_nofollow(const char *pathname);
813const char *tomoyo_get_exe(void);
814const char *tomoyo_yesno(const unsigned int value);
815const struct tomoyo_path_info *tomoyo_compare_name_union
816(const struct tomoyo_path_info *name, const struct tomoyo_name_union *ptr);
817const struct tomoyo_path_info *tomoyo_get_name(const char *name);
818const struct tomoyo_path_info *tomoyo_path_matches_group
819(const struct tomoyo_path_info *pathname, const struct tomoyo_group *group);
820int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
821 struct path *path, const int flag);
822int tomoyo_close_control(struct tomoyo_io_buffer *head);
823int tomoyo_find_next_domain(struct linux_binprm *bprm);
824int tomoyo_get_mode(const struct tomoyo_policy_namespace *ns, const u8 profile,
825 const u8 index);
826int tomoyo_init_request_info(struct tomoyo_request_info *r,
827 struct tomoyo_domain_info *domain,
828 const u8 index);
829int tomoyo_mkdev_perm(const u8 operation, struct path *path,
830 const unsigned int mode, unsigned int dev);
831int tomoyo_mount_permission(char *dev_name, struct path *path,
832 const char *type, unsigned long flags,
833 void *data_page);
834int tomoyo_open_control(const u8 type, struct file *file);
835int tomoyo_path2_perm(const u8 operation, struct path *path1,
836 struct path *path2);
837int tomoyo_path_number_perm(const u8 operation, struct path *path,
838 unsigned long number);
839int tomoyo_path_perm(const u8 operation, struct path *path,
840 const char *target);
841int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation,
842 const struct tomoyo_path_info *filename);
843int tomoyo_poll_control(struct file *file, poll_table *wait);
844int tomoyo_poll_log(struct file *file, poll_table *wait);
845int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
846 __printf(2, 3);
847int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
848 struct tomoyo_acl_param *param,
849 bool (*check_duplicate)
850 (const struct tomoyo_acl_info *,
851 const struct tomoyo_acl_info *),
852 bool (*merge_duplicate)
853 (struct tomoyo_acl_info *, struct tomoyo_acl_info *,
854 const bool));
855int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
856 struct tomoyo_acl_param *param,
857 bool (*check_duplicate)
858 (const struct tomoyo_acl_head *,
859 const struct tomoyo_acl_head *));
860int tomoyo_write_aggregator(struct tomoyo_acl_param *param);
861int tomoyo_write_file(struct tomoyo_acl_param *param);
862int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type);
863int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
864 const u8 type);
865ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
866 const int buffer_len);
867ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
868 const char __user *buffer, const int buffer_len);
869struct tomoyo_condition *tomoyo_get_condition(struct tomoyo_acl_param *param);
870struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
871 const bool transit);
872struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
873struct tomoyo_group *tomoyo_get_group(struct tomoyo_acl_param *param,
874 const u8 idx);
875struct tomoyo_policy_namespace *tomoyo_assign_namespace
876(const char *domainname);
877struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
878 const u8 profile);
879unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
880 const u8 index);
881u8 tomoyo_parse_ulong(unsigned long *result, char **str);
882void *tomoyo_commit_ok(void *data, const unsigned int size);
883void __init tomoyo_load_builtin_policy(void);
884void __init tomoyo_mm_init(void);
885void tomoyo_check_acl(struct tomoyo_request_info *r,
886 bool (*check_entry) (struct tomoyo_request_info *,
887 const struct tomoyo_acl_info *));
888void tomoyo_check_profile(void);
889void tomoyo_convert_time(time_t time, struct tomoyo_time *stamp);
890void tomoyo_del_condition(struct list_head *element);
891void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
892void tomoyo_get_attributes(struct tomoyo_obj_info *obj);
893void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns);
894void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...)
895 __printf(2, 3);
896void tomoyo_load_policy(const char *filename);
897void tomoyo_memory_free(void *ptr);
898void tomoyo_normalize_line(unsigned char *buffer);
899void tomoyo_notify_gc(struct tomoyo_io_buffer *head, const bool is_register);
900void tomoyo_print_ulong(char *buffer, const int buffer_len,
901 const unsigned long value, const u8 type);
902void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
903void tomoyo_put_number_union(struct tomoyo_number_union *ptr);
904void tomoyo_read_log(struct tomoyo_io_buffer *head);
905void tomoyo_update_stat(const u8 index);
906void tomoyo_warn_oom(const char *function);
907void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
908 __printf(2, 3);
909void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
910 va_list args);
911
912/********** External variable definitions. **********/
913
914extern bool tomoyo_policy_loaded;
915extern const char * const tomoyo_condition_keyword
916[TOMOYO_MAX_CONDITION_KEYWORD];
917extern const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
918extern const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
919 + TOMOYO_MAX_MAC_CATEGORY_INDEX];
920extern const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE];
921extern const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION];
922extern const u8 tomoyo_index2category[TOMOYO_MAX_MAC_INDEX];
923extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
924extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
925extern const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION];
926extern struct list_head tomoyo_condition_list;
927extern struct list_head tomoyo_domain_list;
928extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
929extern struct list_head tomoyo_namespace_list;
930extern struct mutex tomoyo_policy_lock;
931extern struct srcu_struct tomoyo_ss;
932extern struct tomoyo_domain_info tomoyo_kernel_domain;
933extern struct tomoyo_policy_namespace tomoyo_kernel_namespace;
934extern unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
935extern unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
936
937/********** Inlined functions. **********/
938
939/**
940 * tomoyo_read_lock - Take lock for protecting policy.
941 *
942 * Returns index number for tomoyo_read_unlock().
943 */
944static inline int tomoyo_read_lock(void)
945{
946 return srcu_read_lock(&tomoyo_ss);
947}
948
949/**
950 * tomoyo_read_unlock - Release lock for protecting policy.
951 *
952 * @idx: Index number returned by tomoyo_read_lock().
953 *
954 * Returns nothing.
955 */
956static inline void tomoyo_read_unlock(int idx)
957{
958 srcu_read_unlock(&tomoyo_ss, idx);
959}
960
961/**
962 * tomoyo_sys_getppid - Copy of getppid().
963 *
964 * Returns parent process's PID.
965 *
966 * Alpha does not have getppid() defined. To be able to build this module on
967 * Alpha, I have to copy getppid() from kernel/timer.c.
968 */
969static inline pid_t tomoyo_sys_getppid(void)
970{
971 pid_t pid;
972 rcu_read_lock();
973 pid = task_tgid_vnr(current->real_parent);
974 rcu_read_unlock();
975 return pid;
976}
977
978/**
979 * tomoyo_sys_getpid - Copy of getpid().
980 *
981 * Returns current thread's PID.
982 *
983 * Alpha does not have getpid() defined. To be able to build this module on
984 * Alpha, I have to copy getpid() from kernel/timer.c.
985 */
986static inline pid_t tomoyo_sys_getpid(void)
987{
988 return task_tgid_vnr(current);
989}
990
991/**
992 * tomoyo_pathcmp - strcmp() for "struct tomoyo_path_info" structure.
993 *
994 * @a: Pointer to "struct tomoyo_path_info".
995 * @b: Pointer to "struct tomoyo_path_info".
996 *
997 * Returns true if @a == @b, false otherwise.
998 */
999static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a,
1000 const struct tomoyo_path_info *b)
1001{
1002 return a->hash != b->hash || strcmp(a->name, b->name);
1003}
1004
1005/**
1006 * tomoyo_put_name - Drop reference on "struct tomoyo_name".
1007 *
1008 * @name: Pointer to "struct tomoyo_path_info". Maybe NULL.
1009 *
1010 * Returns nothing.
1011 */
1012static inline void tomoyo_put_name(const struct tomoyo_path_info *name)
1013{
1014 if (name) {
1015 struct tomoyo_name *ptr =
1016 container_of(name, typeof(*ptr), entry);
1017 atomic_dec(&ptr->head.users);
1018 }
1019}
1020
1021/**
1022 * tomoyo_put_condition - Drop reference on "struct tomoyo_condition".
1023 *
1024 * @cond: Pointer to "struct tomoyo_condition". Maybe NULL.
1025 *
1026 * Returns nothing.
1027 */
1028static inline void tomoyo_put_condition(struct tomoyo_condition *cond)
1029{
1030 if (cond)
1031 atomic_dec(&cond->head.users);
1032}
1033
1034/**
1035 * tomoyo_put_group - Drop reference on "struct tomoyo_group".
1036 *
1037 * @group: Pointer to "struct tomoyo_group". Maybe NULL.
1038 *
1039 * Returns nothing.
1040 */
1041static inline void tomoyo_put_group(struct tomoyo_group *group)
1042{
1043 if (group)
1044 atomic_dec(&group->head.users);
1045}
1046
1047/**
1048 * tomoyo_domain - Get "struct tomoyo_domain_info" for current thread.
1049 *
1050 * Returns pointer to "struct tomoyo_domain_info" for current thread.
1051 */
1052static inline struct tomoyo_domain_info *tomoyo_domain(void)
1053{
1054 return current_cred()->security;
1055}
1056
1057/**
1058 * tomoyo_real_domain - Get "struct tomoyo_domain_info" for specified thread.
1059 *
1060 * @task: Pointer to "struct task_struct".
1061 *
1062 * Returns pointer to "struct tomoyo_security" for specified thread.
1063 */
1064static inline struct tomoyo_domain_info *tomoyo_real_domain(struct task_struct
1065 *task)
1066{
1067 return task_cred_xxx(task, security);
1068}
1069
1070/**
1071 * tomoyo_same_name_union - Check for duplicated "struct tomoyo_name_union" entry.
1072 *
1073 * @a: Pointer to "struct tomoyo_name_union".
1074 * @b: Pointer to "struct tomoyo_name_union".
1075 *
1076 * Returns true if @a == @b, false otherwise.
1077 */
1078static inline bool tomoyo_same_name_union
1079(const struct tomoyo_name_union *a, const struct tomoyo_name_union *b)
1080{
1081 return a->filename == b->filename && a->group == b->group;
1082}
1083
1084/**
1085 * tomoyo_same_number_union - Check for duplicated "struct tomoyo_number_union" entry.
1086 *
1087 * @a: Pointer to "struct tomoyo_number_union".
1088 * @b: Pointer to "struct tomoyo_number_union".
1089 *
1090 * Returns true if @a == @b, false otherwise.
1091 */
1092static inline bool tomoyo_same_number_union
1093(const struct tomoyo_number_union *a, const struct tomoyo_number_union *b)
1094{
1095 return a->values[0] == b->values[0] && a->values[1] == b->values[1] &&
1096 a->group == b->group && a->value_type[0] == b->value_type[0] &&
1097 a->value_type[1] == b->value_type[1];
1098}
1099
1100/**
1101 * tomoyo_current_namespace - Get "struct tomoyo_policy_namespace" for current thread.
1102 *
1103 * Returns pointer to "struct tomoyo_policy_namespace" for current thread.
1104 */
1105static inline struct tomoyo_policy_namespace *tomoyo_current_namespace(void)
1106{
1107 return tomoyo_domain()->ns;
1108}
1109
1110#if defined(CONFIG_SLOB)
1111
1112/**
1113 * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
1114 *
1115 * @size: Size to be rounded up.
1116 *
1117 * Returns @size.
1118 *
1119 * Since SLOB does not round up, this function simply returns @size.
1120 */
1121static inline int tomoyo_round2(size_t size)
1122{
1123 return size;
1124}
1125
1126#else
1127
1128/**
1129 * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
1130 *
1131 * @size: Size to be rounded up.
1132 *
1133 * Returns rounded size.
1134 *
1135 * Strictly speaking, SLAB may be able to allocate (e.g.) 96 bytes instead of
1136 * (e.g.) 128 bytes.
1137 */
1138static inline int tomoyo_round2(size_t size)
1139{
1140#if PAGE_SIZE == 4096
1141 size_t bsize = 32;
1142#else
1143 size_t bsize = 64;
1144#endif
1145 if (!size)
1146 return 0;
1147 while (size > bsize)
1148 bsize <<= 1;
1149 return bsize;
1150}
1151
1152#endif
1153
1154/**
1155 * list_for_each_cookie - iterate over a list with cookie.
1156 * @pos: the &struct list_head to use as a loop cursor.
1157 * @head: the head for your list.
1158 */
1159#define list_for_each_cookie(pos, head) \
1160 if (!pos) \
1161 pos = srcu_dereference((head)->next, &tomoyo_ss); \
1162 for ( ; pos != (head); pos = srcu_dereference(pos->next, &tomoyo_ss))
1163
1164#endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */