2 * security/tomoyo/common.h
4 * Header file for TOMOYO.
6 * Copyright (C) 2005-2010 NTT DATA CORPORATION
9 #ifndef _SECURITY_TOMOYO_COMMON_H
10 #define _SECURITY_TOMOYO_COMMON_H
12 #include <linux/ctype.h>
13 #include <linux/string.h>
15 #include <linux/file.h>
16 #include <linux/kmod.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>
25 /********** Constants definitions. **********/
28 * TOMOYO uses this hash only when appending a string into the string
29 * table. Frequency of appending strings is very low. So we don't need
30 * large (e.g. 64k) hash size. 256 will be sufficient.
32 #define TOMOYO_HASH_BITS 8
33 #define TOMOYO_MAX_HASH (1u<<TOMOYO_HASH_BITS)
36 * This is the max length of a token.
38 * A token consists of only ASCII printable characters.
39 * Non printable characters in a token is represented in \ooo style
40 * octal string. Thus, \ itself is represented as \\.
42 #define TOMOYO_MAX_PATHNAME_LEN 4000
44 /* Profile number is an integer between 0 and 255. */
45 #define TOMOYO_MAX_PROFILES 256
47 /* Keywords for ACLs. */
48 #define TOMOYO_KEYWORD_ALIAS "alias "
49 #define TOMOYO_KEYWORD_ALLOW_READ "allow_read "
50 #define TOMOYO_KEYWORD_DELETE "delete "
51 #define TOMOYO_KEYWORD_DENY_REWRITE "deny_rewrite "
52 #define TOMOYO_KEYWORD_FILE_PATTERN "file_pattern "
53 #define TOMOYO_KEYWORD_INITIALIZE_DOMAIN "initialize_domain "
54 #define TOMOYO_KEYWORD_KEEP_DOMAIN "keep_domain "
55 #define TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN "no_initialize_domain "
56 #define TOMOYO_KEYWORD_NO_KEEP_DOMAIN "no_keep_domain "
57 #define TOMOYO_KEYWORD_SELECT "select "
58 #define TOMOYO_KEYWORD_USE_PROFILE "use_profile "
59 #define TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ "ignore_global_allow_read"
60 /* A domain definition starts with <kernel>. */
61 #define TOMOYO_ROOT_NAME "<kernel>"
62 #define TOMOYO_ROOT_NAME_LEN (sizeof(TOMOYO_ROOT_NAME) - 1)
64 /* Index numbers for Access Controls. */
65 enum tomoyo_mac_index
{
66 TOMOYO_MAC_FOR_FILE
, /* domain_policy.conf */
67 TOMOYO_MAX_ACCEPT_ENTRY
,
69 TOMOYO_MAX_CONTROL_INDEX
72 /* Index numbers for Access Controls. */
73 enum tomoyo_acl_entry_type_index
{
75 TOMOYO_TYPE_PATH2_ACL
,
78 /* Index numbers for File Controls. */
81 * TYPE_READ_WRITE_ACL is special. TYPE_READ_WRITE_ACL is automatically set
82 * if both TYPE_READ_ACL and TYPE_WRITE_ACL are set. Both TYPE_READ_ACL and
83 * TYPE_WRITE_ACL are automatically set if TYPE_READ_WRITE_ACL is set.
84 * TYPE_READ_WRITE_ACL is automatically cleared if either TYPE_READ_ACL or
85 * TYPE_WRITE_ACL is cleared. Both TYPE_READ_ACL and TYPE_WRITE_ACL are
86 * automatically cleared if TYPE_READ_WRITE_ACL is cleared.
89 enum tomoyo_path_acl_index
{
90 TOMOYO_TYPE_READ_WRITE
,
102 TOMOYO_TYPE_TRUNCATE
,
112 TOMOYO_MAX_PATH_OPERATION
115 enum tomoyo_path2_acl_index
{
118 TOMOYO_TYPE_PIVOT_ROOT
,
119 TOMOYO_MAX_PATH2_OPERATION
122 enum tomoyo_securityfs_interface_index
{
124 TOMOYO_EXCEPTIONPOLICY
,
125 TOMOYO_DOMAIN_STATUS
,
126 TOMOYO_PROCESS_STATUS
,
134 /********** Structure definitions. **********/
137 * tomoyo_page_buffer is a structure which is used for holding a pathname
138 * obtained from "struct dentry" and "struct vfsmount" pair.
139 * As of now, it is 4096 bytes. If users complain that 4096 bytes is too small
140 * (because TOMOYO escapes non ASCII printable characters using \ooo format),
141 * we will make the buffer larger.
143 struct tomoyo_page_buffer
{
148 * tomoyo_path_info is a structure which is used for holding a string data
150 * This structure has several fields for supporting pattern matching.
152 * (1) "name" is the '\0' terminated string data.
153 * (2) "hash" is full_name_hash(name, strlen(name)).
154 * This allows tomoyo_pathcmp() to compare by hash before actually compare
156 * (3) "const_len" is the length of the initial segment of "name" which
157 * consists entirely of non wildcard characters. In other words, the length
158 * which we can compare two strings using strncmp().
159 * (4) "is_dir" is a bool which is true if "name" ends with "/",
161 * TOMOYO distinguishes directory and non-directory. A directory ends with
162 * "/" and non-directory does not end with "/".
163 * (5) "is_patterned" is a bool which is true if "name" contains wildcard
164 * characters, false otherwise. This allows TOMOYO to use "hash" and
165 * strcmp() for string comparison if "is_patterned" is false.
167 struct tomoyo_path_info
{
169 u32 hash
; /* = full_name_hash(name, strlen(name)) */
170 u16 const_len
; /* = tomoyo_const_part_length(name) */
171 bool is_dir
; /* = tomoyo_strendswith(name, "/") */
172 bool is_patterned
; /* = tomoyo_path_contains_pattern(name) */
176 * tomoyo_name_entry is a structure which is used for linking
177 * "struct tomoyo_path_info" into tomoyo_name_list .
179 struct tomoyo_name_entry
{
180 struct list_head list
;
182 struct tomoyo_path_info entry
;
186 * tomoyo_path_info_with_data is a structure which is used for holding a
187 * pathname obtained from "struct dentry" and "struct vfsmount" pair.
189 * "struct tomoyo_path_info_with_data" consists of "struct tomoyo_path_info"
190 * and buffer for the pathname, while "struct tomoyo_page_buffer" consists of
191 * buffer for the pathname only.
193 * "struct tomoyo_path_info_with_data" is intended to allow TOMOYO to release
194 * both "struct tomoyo_path_info" and buffer for the pathname by single kfree()
195 * so that we don't need to return two pointers to the caller. If the caller
196 * puts "struct tomoyo_path_info" on stack memory, we will be able to remove
197 * "struct tomoyo_path_info_with_data".
199 struct tomoyo_path_info_with_data
{
200 /* Keep "head" first, for this pointer is passed to kfree(). */
201 struct tomoyo_path_info head
;
202 char barrier1
[16]; /* Safeguard for overrun. */
203 char body
[TOMOYO_MAX_PATHNAME_LEN
];
204 char barrier2
[16]; /* Safeguard for overrun. */
208 * tomoyo_acl_info is a structure which is used for holding
210 * (1) "list" which is linked to the ->acl_info_list of
211 * "struct tomoyo_domain_info"
212 * (2) "type" which tells type of the entry (either
213 * "struct tomoyo_path_acl" or "struct tomoyo_path2_acl").
215 * Packing "struct tomoyo_acl_info" allows
216 * "struct tomoyo_path_acl" to embed "u8" + "u16" and
217 * "struct tomoyo_path2_acl" to embed "u8"
218 * without enlarging their structure size.
220 struct tomoyo_acl_info
{
221 struct list_head list
;
226 * tomoyo_domain_info is a structure which is used for holding permissions
227 * (e.g. "allow_read /lib/libc-2.5.so") given to each domain.
228 * It has following fields.
230 * (1) "list" which is linked to tomoyo_domain_list .
231 * (2) "acl_info_list" which is linked to "struct tomoyo_acl_info".
232 * (3) "domainname" which holds the name of the domain.
233 * (4) "profile" which remembers profile number assigned to this domain.
234 * (5) "is_deleted" is a bool which is true if this domain is marked as
235 * "deleted", false otherwise.
236 * (6) "quota_warned" is a bool which is used for suppressing warning message
237 * when learning mode learned too much entries.
238 * (7) "ignore_global_allow_read" is a bool which is true if this domain
239 * should ignore "allow_read" directive in exception policy.
240 * (8) "transition_failed" is a bool which is set to true when this domain was
241 * unable to create a new domain at tomoyo_find_next_domain() because the
242 * name of the domain to be created was too long or it could not allocate
243 * memory. If set to true, more than one process continued execve()
244 * without domain transition.
245 * (9) "users" is an atomic_t that holds how many "struct cred"->security
246 * are referring this "struct tomoyo_domain_info". If is_deleted == true
247 * and users == 0, this struct will be kfree()d upon next garbage
250 * A domain's lifecycle is an analogy of files on / directory.
251 * Multiple domains with the same domainname cannot be created (as with
252 * creating files with the same filename fails with -EEXIST).
253 * If a process reached a domain, that process can reside in that domain after
254 * that domain is marked as "deleted" (as with a process can access an already
255 * open()ed file after that file was unlink()ed).
257 struct tomoyo_domain_info
{
258 struct list_head list
;
259 struct list_head acl_info_list
;
260 /* Name of this domain. Never NULL. */
261 const struct tomoyo_path_info
*domainname
;
262 u8 profile
; /* Profile number to use. */
263 bool is_deleted
; /* Delete flag. */
264 bool quota_warned
; /* Quota warnning flag. */
265 bool ignore_global_allow_read
; /* Ignore "allow_read" flag. */
266 bool transition_failed
; /* Domain transition failed flag. */
267 atomic_t users
; /* Number of referring credentials. */
271 * tomoyo_path_acl is a structure which is used for holding an
272 * entry with one pathname operation (e.g. open(), mkdir()).
273 * It has following fields.
275 * (1) "head" which is a "struct tomoyo_acl_info".
276 * (2) "perm" which is a bitmask of permitted operations.
277 * (3) "filename" is the pathname.
279 * Directives held by this structure are "allow_read/write", "allow_execute",
280 * "allow_read", "allow_write", "allow_create", "allow_unlink", "allow_mkdir",
281 * "allow_rmdir", "allow_mkfifo", "allow_mksock", "allow_mkblock",
282 * "allow_mkchar", "allow_truncate", "allow_symlink", "allow_rewrite",
283 * "allow_chmod", "allow_chown", "allow_chgrp", "allow_chroot", "allow_mount"
284 * and "allow_unmount".
286 struct tomoyo_path_acl
{
287 struct tomoyo_acl_info head
; /* type = TOMOYO_TYPE_PATH_ACL */
290 /* Pointer to single pathname. */
291 const struct tomoyo_path_info
*filename
;
295 * tomoyo_path2_acl is a structure which is used for holding an
296 * entry with two pathnames operation (i.e. link(), rename() and pivot_root()).
297 * It has following fields.
299 * (1) "head" which is a "struct tomoyo_acl_info".
300 * (2) "perm" which is a bitmask of permitted operations.
301 * (3) "filename1" is the source/old pathname.
302 * (4) "filename2" is the destination/new pathname.
304 * Directives held by this structure are "allow_rename", "allow_link" and
305 * "allow_pivot_root".
307 struct tomoyo_path2_acl
{
308 struct tomoyo_acl_info head
; /* type = TOMOYO_TYPE_PATH2_ACL */
310 /* Pointer to single pathname. */
311 const struct tomoyo_path_info
*filename1
;
312 /* Pointer to single pathname. */
313 const struct tomoyo_path_info
*filename2
;
317 * tomoyo_io_buffer is a structure which is used for reading and modifying
318 * configuration via /sys/kernel/security/tomoyo/ interface.
319 * It has many fields. ->read_var1 , ->read_var2 , ->write_var1 are used as
322 * Since the content of /sys/kernel/security/tomoyo/domain_policy is a list of
323 * "struct tomoyo_domain_info" entries and each "struct tomoyo_domain_info"
324 * entry has a list of "struct tomoyo_acl_info", we need two cursors when
325 * reading (one is for traversing tomoyo_domain_list and the other is for
326 * traversing "struct tomoyo_acl_info"->acl_info_list ).
328 * If a line written to /sys/kernel/security/tomoyo/domain_policy starts with
329 * "select ", TOMOYO seeks the cursor ->read_var1 and ->write_var1 to the
330 * domain with the domainname specified by the rest of that line (NULL is set
332 * If a line written to /sys/kernel/security/tomoyo/domain_policy starts with
333 * "delete ", TOMOYO deletes an entry or a domain specified by the rest of that
334 * line (->write_var1 is set to NULL if a domain was deleted).
335 * If a line written to /sys/kernel/security/tomoyo/domain_policy starts with
336 * neither "select " nor "delete ", an entry or a domain specified by that line
339 struct tomoyo_io_buffer
{
340 int (*read
) (struct tomoyo_io_buffer
*);
341 int (*write
) (struct tomoyo_io_buffer
*);
342 /* Exclusive lock for this structure. */
344 /* Index returned by tomoyo_read_lock(). */
346 /* The position currently reading from. */
347 struct list_head
*read_var1
;
348 /* Extra variables for reading. */
349 struct list_head
*read_var2
;
350 /* The position currently writing to. */
351 struct tomoyo_domain_info
*write_var1
;
352 /* The step for reading. */
354 /* Buffer for reading. */
356 /* EOF flag for reading. */
358 /* Read domain ACL of specified PID? */
359 bool read_single_domain
;
360 /* Extra variable for reading. */
362 /* Bytes available for reading. */
364 /* Size of read buffer. */
366 /* Buffer for writing. */
368 /* Bytes available for writing. */
370 /* Size of write buffer. */
375 * tomoyo_globally_readable_file_entry is a structure which is used for holding
376 * "allow_read" entries.
377 * It has following fields.
379 * (1) "list" which is linked to tomoyo_globally_readable_list .
380 * (2) "filename" is a pathname which is allowed to open(O_RDONLY).
381 * (3) "is_deleted" is a bool which is true if marked as deleted, false
384 struct tomoyo_globally_readable_file_entry
{
385 struct list_head list
;
386 const struct tomoyo_path_info
*filename
;
391 * tomoyo_pattern_entry is a structure which is used for holding
392 * "tomoyo_pattern_list" entries.
393 * It has following fields.
395 * (1) "list" which is linked to tomoyo_pattern_list .
396 * (2) "pattern" is a pathname pattern which is used for converting pathnames
397 * to pathname patterns during learning mode.
398 * (3) "is_deleted" is a bool which is true if marked as deleted, false
401 struct tomoyo_pattern_entry
{
402 struct list_head list
;
403 const struct tomoyo_path_info
*pattern
;
408 * tomoyo_no_rewrite_entry is a structure which is used for holding
409 * "deny_rewrite" entries.
410 * It has following fields.
412 * (1) "list" which is linked to tomoyo_no_rewrite_list .
413 * (2) "pattern" is a pathname which is by default not permitted to modify
414 * already existing content.
415 * (3) "is_deleted" is a bool which is true if marked as deleted, false
418 struct tomoyo_no_rewrite_entry
{
419 struct list_head list
;
420 const struct tomoyo_path_info
*pattern
;
425 * tomoyo_domain_initializer_entry is a structure which is used for holding
426 * "initialize_domain" and "no_initialize_domain" entries.
427 * It has following fields.
429 * (1) "list" which is linked to tomoyo_domain_initializer_list .
430 * (2) "domainname" which is "a domainname" or "the last component of a
431 * domainname". This field is NULL if "from" clause is not specified.
432 * (3) "program" which is a program's pathname.
433 * (4) "is_deleted" is a bool which is true if marked as deleted, false
435 * (5) "is_not" is a bool which is true if "no_initialize_domain", false
437 * (6) "is_last_name" is a bool which is true if "domainname" is "the last
438 * component of a domainname", false otherwise.
440 struct tomoyo_domain_initializer_entry
{
441 struct list_head list
;
442 const struct tomoyo_path_info
*domainname
; /* This may be NULL */
443 const struct tomoyo_path_info
*program
;
445 bool is_not
; /* True if this entry is "no_initialize_domain". */
446 /* True if the domainname is tomoyo_get_last_name(). */
451 * tomoyo_domain_keeper_entry is a structure which is used for holding
452 * "keep_domain" and "no_keep_domain" entries.
453 * It has following fields.
455 * (1) "list" which is linked to tomoyo_domain_keeper_list .
456 * (2) "domainname" which is "a domainname" or "the last component of a
458 * (3) "program" which is a program's pathname.
459 * This field is NULL if "from" clause is not specified.
460 * (4) "is_deleted" is a bool which is true if marked as deleted, false
462 * (5) "is_not" is a bool which is true if "no_initialize_domain", false
464 * (6) "is_last_name" is a bool which is true if "domainname" is "the last
465 * component of a domainname", false otherwise.
467 struct tomoyo_domain_keeper_entry
{
468 struct list_head list
;
469 const struct tomoyo_path_info
*domainname
;
470 const struct tomoyo_path_info
*program
; /* This may be NULL */
472 bool is_not
; /* True if this entry is "no_keep_domain". */
473 /* True if the domainname is tomoyo_get_last_name(). */
478 * tomoyo_alias_entry is a structure which is used for holding "alias" entries.
479 * It has following fields.
481 * (1) "list" which is linked to tomoyo_alias_list .
482 * (2) "original_name" which is a dereferenced pathname.
483 * (3) "aliased_name" which is a symlink's pathname.
484 * (4) "is_deleted" is a bool which is true if marked as deleted, false
487 struct tomoyo_alias_entry
{
488 struct list_head list
;
489 const struct tomoyo_path_info
*original_name
;
490 const struct tomoyo_path_info
*aliased_name
;
495 * tomoyo_policy_manager_entry is a structure which is used for holding list of
496 * domainnames or programs which are permitted to modify configuration via
497 * /sys/kernel/security/tomoyo/ interface.
498 * It has following fields.
500 * (1) "list" which is linked to tomoyo_policy_manager_list .
501 * (2) "manager" is a domainname or a program's pathname.
502 * (3) "is_domain" is a bool which is true if "manager" is a domainname, false
504 * (4) "is_deleted" is a bool which is true if marked as deleted, false
507 struct tomoyo_policy_manager_entry
{
508 struct list_head list
;
509 /* A path to program or a domainname. */
510 const struct tomoyo_path_info
*manager
;
511 bool is_domain
; /* True if manager is a domainname. */
512 bool is_deleted
; /* True if this entry is deleted. */
515 /********** Function prototypes. **********/
517 /* Check whether the domain has too many ACL entries to hold. */
518 bool tomoyo_domain_quota_is_ok(struct tomoyo_domain_info
* const domain
);
519 /* Transactional sprintf() for policy dump. */
520 bool tomoyo_io_printf(struct tomoyo_io_buffer
*head
, const char *fmt
, ...)
521 __attribute__ ((format(printf
, 2, 3)));
522 /* Check whether the domainname is correct. */
523 bool tomoyo_is_correct_domain(const unsigned char *domainname
,
524 const char *function
);
525 /* Check whether the token is correct. */
526 bool tomoyo_is_correct_path(const char *filename
, const s8 start_type
,
527 const s8 pattern_type
, const s8 end_type
,
528 const char *function
);
529 /* Check whether the token can be a domainname. */
530 bool tomoyo_is_domain_def(const unsigned char *buffer
);
531 /* Check whether the given filename matches the given pattern. */
532 bool tomoyo_path_matches_pattern(const struct tomoyo_path_info
*filename
,
533 const struct tomoyo_path_info
*pattern
);
534 /* Read "alias" entry in exception policy. */
535 bool tomoyo_read_alias_policy(struct tomoyo_io_buffer
*head
);
537 * Read "initialize_domain" and "no_initialize_domain" entry
538 * in exception policy.
540 bool tomoyo_read_domain_initializer_policy(struct tomoyo_io_buffer
*head
);
541 /* Read "keep_domain" and "no_keep_domain" entry in exception policy. */
542 bool tomoyo_read_domain_keeper_policy(struct tomoyo_io_buffer
*head
);
543 /* Read "file_pattern" entry in exception policy. */
544 bool tomoyo_read_file_pattern(struct tomoyo_io_buffer
*head
);
545 /* Read "allow_read" entry in exception policy. */
546 bool tomoyo_read_globally_readable_policy(struct tomoyo_io_buffer
*head
);
547 /* Read "deny_rewrite" entry in exception policy. */
548 bool tomoyo_read_no_rewrite_policy(struct tomoyo_io_buffer
*head
);
549 /* Write domain policy violation warning message to console? */
550 bool tomoyo_verbose_mode(const struct tomoyo_domain_info
*domain
);
551 /* Convert double path operation to operation name. */
552 const char *tomoyo_path22keyword(const u8 operation
);
553 /* Get the last component of the given domainname. */
554 const char *tomoyo_get_last_name(const struct tomoyo_domain_info
*domain
);
555 /* Get warning message. */
556 const char *tomoyo_get_msg(const bool is_enforce
);
557 /* Convert single path operation to operation name. */
558 const char *tomoyo_path2keyword(const u8 operation
);
559 /* Create "alias" entry in exception policy. */
560 int tomoyo_write_alias_policy(char *data
, const bool is_delete
);
562 * Create "initialize_domain" and "no_initialize_domain" entry
563 * in exception policy.
565 int tomoyo_write_domain_initializer_policy(char *data
, const bool is_not
,
566 const bool is_delete
);
567 /* Create "keep_domain" and "no_keep_domain" entry in exception policy. */
568 int tomoyo_write_domain_keeper_policy(char *data
, const bool is_not
,
569 const bool is_delete
);
571 * Create "allow_read/write", "allow_execute", "allow_read", "allow_write",
572 * "allow_create", "allow_unlink", "allow_mkdir", "allow_rmdir",
573 * "allow_mkfifo", "allow_mksock", "allow_mkblock", "allow_mkchar",
574 * "allow_truncate", "allow_symlink", "allow_rewrite", "allow_rename" and
575 * "allow_link" entry in domain policy.
577 int tomoyo_write_file_policy(char *data
, struct tomoyo_domain_info
*domain
,
578 const bool is_delete
);
579 /* Create "allow_read" entry in exception policy. */
580 int tomoyo_write_globally_readable_policy(char *data
, const bool is_delete
);
581 /* Create "deny_rewrite" entry in exception policy. */
582 int tomoyo_write_no_rewrite_policy(char *data
, const bool is_delete
);
583 /* Create "file_pattern" entry in exception policy. */
584 int tomoyo_write_pattern_policy(char *data
, const bool is_delete
);
585 /* Find a domain by the given name. */
586 struct tomoyo_domain_info
*tomoyo_find_domain(const char *domainname
);
587 /* Find or create a domain by the given name. */
588 struct tomoyo_domain_info
*tomoyo_find_or_assign_new_domain(const char *
591 /* Check mode for specified functionality. */
592 unsigned int tomoyo_check_flags(const struct tomoyo_domain_info
*domain
,
594 /* Fill in "struct tomoyo_path_info" members. */
595 void tomoyo_fill_path_info(struct tomoyo_path_info
*ptr
);
596 /* Run policy loader when /sbin/init starts. */
597 void tomoyo_load_policy(const char *filename
);
599 /* Convert binary string to ascii string. */
600 int tomoyo_encode(char *buffer
, int buflen
, const char *str
);
602 /* Returns realpath(3) of the given pathname but ignores chroot'ed root. */
603 int tomoyo_realpath_from_path2(struct path
*path
, char *newname
,
607 * Returns realpath(3) of the given pathname but ignores chroot'ed root.
608 * These functions use kzalloc(), so the caller must call kfree()
609 * if these functions didn't return NULL.
611 char *tomoyo_realpath(const char *pathname
);
613 * Same with tomoyo_realpath() except that it doesn't follow the final symlink.
615 char *tomoyo_realpath_nofollow(const char *pathname
);
616 /* Same with tomoyo_realpath() except that the pathname is already solved. */
617 char *tomoyo_realpath_from_path(struct path
*path
);
619 /* Check memory quota. */
620 bool tomoyo_memory_ok(void *ptr
);
623 * Keep the given name on the RAM.
624 * The RAM is shared, so NEVER try to modify or kfree() the returned name.
626 const struct tomoyo_path_info
*tomoyo_get_name(const char *name
);
628 /* Check for memory usage. */
629 int tomoyo_read_memory_counter(struct tomoyo_io_buffer
*head
);
631 /* Set memory quota. */
632 int tomoyo_write_memory_quota(struct tomoyo_io_buffer
*head
);
634 /* Initialize realpath related code. */
635 void __init
tomoyo_realpath_init(void);
636 int tomoyo_check_exec_perm(struct tomoyo_domain_info
*domain
,
637 const struct tomoyo_path_info
*filename
);
638 int tomoyo_check_open_permission(struct tomoyo_domain_info
*domain
,
639 struct path
*path
, const int flag
);
640 int tomoyo_path_perm(const u8 operation
, struct path
*path
);
641 int tomoyo_path2_perm(const u8 operation
, struct path
*path1
,
643 int tomoyo_check_rewrite_permission(struct file
*filp
);
644 int tomoyo_find_next_domain(struct linux_binprm
*bprm
);
646 /* Run garbage collector. */
647 void tomoyo_run_gc(void);
649 void tomoyo_memory_free(void *ptr
);
651 /********** External variable definitions. **********/
654 extern struct srcu_struct tomoyo_ss
;
656 /* The list for "struct tomoyo_domain_info". */
657 extern struct list_head tomoyo_domain_list
;
659 extern struct list_head tomoyo_domain_initializer_list
;
660 extern struct list_head tomoyo_domain_keeper_list
;
661 extern struct list_head tomoyo_alias_list
;
662 extern struct list_head tomoyo_globally_readable_list
;
663 extern struct list_head tomoyo_pattern_list
;
664 extern struct list_head tomoyo_no_rewrite_list
;
665 extern struct list_head tomoyo_policy_manager_list
;
666 extern struct list_head tomoyo_name_list
[TOMOYO_MAX_HASH
];
667 extern struct mutex tomoyo_name_list_lock
;
669 /* Lock for protecting policy. */
670 extern struct mutex tomoyo_policy_lock
;
672 /* Has /sbin/init started? */
673 extern bool tomoyo_policy_loaded
;
675 /* The kernel's domain. */
676 extern struct tomoyo_domain_info tomoyo_kernel_domain
;
678 /********** Inlined functions. **********/
680 static inline int tomoyo_read_lock(void)
682 return srcu_read_lock(&tomoyo_ss
);
685 static inline void tomoyo_read_unlock(int idx
)
687 srcu_read_unlock(&tomoyo_ss
, idx
);
690 /* strcmp() for "struct tomoyo_path_info" structure. */
691 static inline bool tomoyo_pathcmp(const struct tomoyo_path_info
*a
,
692 const struct tomoyo_path_info
*b
)
694 return a
->hash
!= b
->hash
|| strcmp(a
->name
, b
->name
);
698 * tomoyo_is_valid - Check whether the character is a valid char.
700 * @c: The character to check.
702 * Returns true if @c is a valid character, false otherwise.
704 static inline bool tomoyo_is_valid(const unsigned char c
)
706 return c
> ' ' && c
< 127;
710 * tomoyo_is_invalid - Check whether the character is an invalid char.
712 * @c: The character to check.
714 * Returns true if @c is an invalid character, false otherwise.
716 static inline bool tomoyo_is_invalid(const unsigned char c
)
718 return c
&& (c
<= ' ' || c
>= 127);
721 static inline void tomoyo_put_name(const struct tomoyo_path_info
*name
)
724 struct tomoyo_name_entry
*ptr
=
725 container_of(name
, struct tomoyo_name_entry
, entry
);
726 atomic_dec(&ptr
->users
);
730 static inline struct tomoyo_domain_info
*tomoyo_domain(void)
732 return current_cred()->security
;
735 static inline struct tomoyo_domain_info
*tomoyo_real_domain(struct task_struct
738 return task_cred_xxx(task
, security
);
742 * list_for_each_cookie - iterate over a list with cookie.
743 * @pos: the &struct list_head to use as a loop cursor.
744 * @cookie: the &struct list_head to use as a cookie.
745 * @head: the head for your list.
747 * Same with list_for_each_rcu() except that this primitive uses @cookie
748 * so that we can continue iteration.
749 * @cookie must be NULL when iteration starts, and @cookie will become
750 * NULL when iteration finishes.
752 #define list_for_each_cookie(pos, cookie, head) \
753 for (({ if (!cookie) \
755 pos = rcu_dereference((cookie)->next); \
756 prefetch(pos->next), pos != (head) || ((cookie) = NULL); \
757 (cookie) = pos, pos = rcu_dereference(pos->next))
759 #endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */