1 // SPDX-License-Identifier: GPL-2.0
3 * security/tomoyo/util.c
5 * Copyright (C) 2005-2011 NTT DATA CORPORATION
8 #include <linux/slab.h>
9 #include <linux/rculist.h>
13 /* Lock for protecting policy. */
14 DEFINE_MUTEX(tomoyo_policy_lock);
16 /* Has /sbin/init started? */
17 bool tomoyo_policy_loaded;
20 * Mapping table from "enum tomoyo_mac_index" to
21 * "enum tomoyo_mac_category_index".
23 const u8 tomoyo_index2category[TOMOYO_MAX_MAC_INDEX] = {
24 /* CONFIG::file group */
25 [TOMOYO_MAC_FILE_EXECUTE] = TOMOYO_MAC_CATEGORY_FILE,
26 [TOMOYO_MAC_FILE_OPEN] = TOMOYO_MAC_CATEGORY_FILE,
27 [TOMOYO_MAC_FILE_CREATE] = TOMOYO_MAC_CATEGORY_FILE,
28 [TOMOYO_MAC_FILE_UNLINK] = TOMOYO_MAC_CATEGORY_FILE,
29 [TOMOYO_MAC_FILE_GETATTR] = TOMOYO_MAC_CATEGORY_FILE,
30 [TOMOYO_MAC_FILE_MKDIR] = TOMOYO_MAC_CATEGORY_FILE,
31 [TOMOYO_MAC_FILE_RMDIR] = TOMOYO_MAC_CATEGORY_FILE,
32 [TOMOYO_MAC_FILE_MKFIFO] = TOMOYO_MAC_CATEGORY_FILE,
33 [TOMOYO_MAC_FILE_MKSOCK] = TOMOYO_MAC_CATEGORY_FILE,
34 [TOMOYO_MAC_FILE_TRUNCATE] = TOMOYO_MAC_CATEGORY_FILE,
35 [TOMOYO_MAC_FILE_SYMLINK] = TOMOYO_MAC_CATEGORY_FILE,
36 [TOMOYO_MAC_FILE_MKBLOCK] = TOMOYO_MAC_CATEGORY_FILE,
37 [TOMOYO_MAC_FILE_MKCHAR] = TOMOYO_MAC_CATEGORY_FILE,
38 [TOMOYO_MAC_FILE_LINK] = TOMOYO_MAC_CATEGORY_FILE,
39 [TOMOYO_MAC_FILE_RENAME] = TOMOYO_MAC_CATEGORY_FILE,
40 [TOMOYO_MAC_FILE_CHMOD] = TOMOYO_MAC_CATEGORY_FILE,
41 [TOMOYO_MAC_FILE_CHOWN] = TOMOYO_MAC_CATEGORY_FILE,
42 [TOMOYO_MAC_FILE_CHGRP] = TOMOYO_MAC_CATEGORY_FILE,
43 [TOMOYO_MAC_FILE_IOCTL] = TOMOYO_MAC_CATEGORY_FILE,
44 [TOMOYO_MAC_FILE_CHROOT] = TOMOYO_MAC_CATEGORY_FILE,
45 [TOMOYO_MAC_FILE_MOUNT] = TOMOYO_MAC_CATEGORY_FILE,
46 [TOMOYO_MAC_FILE_UMOUNT] = TOMOYO_MAC_CATEGORY_FILE,
47 [TOMOYO_MAC_FILE_PIVOT_ROOT] = TOMOYO_MAC_CATEGORY_FILE,
48 /* CONFIG::network group */
49 [TOMOYO_MAC_NETWORK_INET_STREAM_BIND] =
50 TOMOYO_MAC_CATEGORY_NETWORK,
51 [TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN] =
52 TOMOYO_MAC_CATEGORY_NETWORK,
53 [TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT] =
54 TOMOYO_MAC_CATEGORY_NETWORK,
55 [TOMOYO_MAC_NETWORK_INET_DGRAM_BIND] =
56 TOMOYO_MAC_CATEGORY_NETWORK,
57 [TOMOYO_MAC_NETWORK_INET_DGRAM_SEND] =
58 TOMOYO_MAC_CATEGORY_NETWORK,
59 [TOMOYO_MAC_NETWORK_INET_RAW_BIND] =
60 TOMOYO_MAC_CATEGORY_NETWORK,
61 [TOMOYO_MAC_NETWORK_INET_RAW_SEND] =
62 TOMOYO_MAC_CATEGORY_NETWORK,
63 [TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND] =
64 TOMOYO_MAC_CATEGORY_NETWORK,
65 [TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN] =
66 TOMOYO_MAC_CATEGORY_NETWORK,
67 [TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT] =
68 TOMOYO_MAC_CATEGORY_NETWORK,
69 [TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND] =
70 TOMOYO_MAC_CATEGORY_NETWORK,
71 [TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND] =
72 TOMOYO_MAC_CATEGORY_NETWORK,
73 [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND] =
74 TOMOYO_MAC_CATEGORY_NETWORK,
75 [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN] =
76 TOMOYO_MAC_CATEGORY_NETWORK,
77 [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] =
78 TOMOYO_MAC_CATEGORY_NETWORK,
79 /* CONFIG::misc group */
80 [TOMOYO_MAC_ENVIRON] = TOMOYO_MAC_CATEGORY_MISC,
84 * tomoyo_convert_time - Convert time_t to YYYY/MM/DD hh/mm/ss.
86 * @time: Seconds since 1970/01/01 00:00:00.
87 * @stamp: Pointer to "struct tomoyo_time".
91 void tomoyo_convert_time(time64_t time64, struct tomoyo_time *stamp)
94 time64_to_tm(time64, 0, &tm);
95 stamp->sec = tm.tm_sec;
96 stamp->min = tm.tm_min;
97 stamp->hour = tm.tm_hour;
98 stamp->day = tm.tm_mday;
99 stamp->month = tm.tm_mon + 1;
100 stamp->year = tm.tm_year + 1900;
104 * tomoyo_permstr - Find permission keywords.
106 * @string: String representation for permissions in foo/bar/buz format.
107 * @keyword: Keyword to find from @string/
109 * Returns ture if @keyword was found in @string, false otherwise.
111 * This function assumes that strncmp(w1, w2, strlen(w1)) != 0 if w1 != w2.
113 bool tomoyo_permstr(const char *string, const char *keyword)
115 const char *cp = strstr(string, keyword);
117 return cp == string || *(cp - 1) == '/';
122 * tomoyo_read_token - Read a word from a line.
124 * @param: Pointer to "struct tomoyo_acl_param".
126 * Returns a word on success, "" otherwise.
128 * To allow the caller to skip NULL check, this function returns "" rather than
129 * NULL if there is no more words to read.
131 char *tomoyo_read_token(struct tomoyo_acl_param *param)
133 char *pos = param->data;
134 char *del = strchr(pos, ' ');
138 del = pos + strlen(pos);
144 * tomoyo_get_domainname - Read a domainname from a line.
146 * @param: Pointer to "struct tomoyo_acl_param".
148 * Returns a domainname on success, NULL otherwise.
150 const struct tomoyo_path_info *tomoyo_get_domainname
151 (struct tomoyo_acl_param *param)
153 char *start = param->data;
156 if (*pos++ != ' ' || *pos++ == '/')
163 if (tomoyo_correct_domain(start))
164 return tomoyo_get_name(start);
169 * tomoyo_parse_ulong - Parse an "unsigned long" value.
171 * @result: Pointer to "unsigned long".
172 * @str: Pointer to string to parse.
174 * Returns one of values in "enum tomoyo_value_type".
176 * The @src is updated to point the first character after the value
179 u8 tomoyo_parse_ulong(unsigned long *result, char **str)
181 const char *cp = *str;
186 if (c == 'x' || c == 'X') {
189 } else if (c >= '0' && c <= '7') {
194 *result = simple_strtoul(cp, &ep, base);
196 return TOMOYO_VALUE_TYPE_INVALID;
200 return TOMOYO_VALUE_TYPE_HEXADECIMAL;
202 return TOMOYO_VALUE_TYPE_OCTAL;
204 return TOMOYO_VALUE_TYPE_DECIMAL;
209 * tomoyo_print_ulong - Print an "unsigned long" value.
211 * @buffer: Pointer to buffer.
212 * @buffer_len: Size of @buffer.
213 * @value: An "unsigned long" value.
214 * @type: Type of @value.
218 void tomoyo_print_ulong(char *buffer, const int buffer_len,
219 const unsigned long value, const u8 type)
221 if (type == TOMOYO_VALUE_TYPE_DECIMAL)
222 snprintf(buffer, buffer_len, "%lu", value);
223 else if (type == TOMOYO_VALUE_TYPE_OCTAL)
224 snprintf(buffer, buffer_len, "0%lo", value);
225 else if (type == TOMOYO_VALUE_TYPE_HEXADECIMAL)
226 snprintf(buffer, buffer_len, "0x%lX", value);
228 snprintf(buffer, buffer_len, "type(%u)", type);
232 * tomoyo_parse_name_union - Parse a tomoyo_name_union.
234 * @param: Pointer to "struct tomoyo_acl_param".
235 * @ptr: Pointer to "struct tomoyo_name_union".
237 * Returns true on success, false otherwise.
239 bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
240 struct tomoyo_name_union *ptr)
243 if (param->data[0] == '@') {
245 ptr->group = tomoyo_get_group(param, TOMOYO_PATH_GROUP);
246 return ptr->group != NULL;
248 filename = tomoyo_read_token(param);
249 if (!tomoyo_correct_word(filename))
251 ptr->filename = tomoyo_get_name(filename);
252 return ptr->filename != NULL;
256 * tomoyo_parse_number_union - Parse a tomoyo_number_union.
258 * @param: Pointer to "struct tomoyo_acl_param".
259 * @ptr: Pointer to "struct tomoyo_number_union".
261 * Returns true on success, false otherwise.
263 bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
264 struct tomoyo_number_union *ptr)
269 memset(ptr, 0, sizeof(*ptr));
270 if (param->data[0] == '@') {
272 ptr->group = tomoyo_get_group(param, TOMOYO_NUMBER_GROUP);
273 return ptr->group != NULL;
275 data = tomoyo_read_token(param);
276 type = tomoyo_parse_ulong(&v, &data);
277 if (type == TOMOYO_VALUE_TYPE_INVALID)
280 ptr->value_type[0] = type;
283 ptr->value_type[1] = type;
288 type = tomoyo_parse_ulong(&v, &data);
289 if (type == TOMOYO_VALUE_TYPE_INVALID || *data || ptr->values[0] > v)
292 ptr->value_type[1] = type;
297 * tomoyo_byte_range - Check whether the string is a \ooo style octal value.
299 * @str: Pointer to the string.
301 * Returns true if @str is a \ooo style octal value, false otherwise.
303 * TOMOYO uses \ooo style representation for 0x01 - 0x20 and 0x7F - 0xFF.
304 * This function verifies that \ooo is in valid range.
306 static inline bool tomoyo_byte_range(const char *str)
308 return *str >= '0' && *str++ <= '3' &&
309 *str >= '0' && *str++ <= '7' &&
310 *str >= '0' && *str <= '7';
314 * tomoyo_alphabet_char - Check whether the character is an alphabet.
316 * @c: The character to check.
318 * Returns true if @c is an alphabet character, false otherwise.
320 static inline bool tomoyo_alphabet_char(const char c)
322 return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
326 * tomoyo_make_byte - Make byte value from three octal characters.
328 * @c1: The first character.
329 * @c2: The second character.
330 * @c3: The third character.
332 * Returns byte value.
334 static inline u8 tomoyo_make_byte(const u8 c1, const u8 c2, const u8 c3)
336 return ((c1 - '0') << 6) + ((c2 - '0') << 3) + (c3 - '0');
340 * tomoyo_valid - Check whether the character is a valid char.
342 * @c: The character to check.
344 * Returns true if @c is a valid character, false otherwise.
346 static inline bool tomoyo_valid(const unsigned char c)
348 return c > ' ' && c < 127;
352 * tomoyo_invalid - Check whether the character is an invalid char.
354 * @c: The character to check.
356 * Returns true if @c is an invalid character, false otherwise.
358 static inline bool tomoyo_invalid(const unsigned char c)
360 return c && (c <= ' ' || c >= 127);
364 * tomoyo_str_starts - Check whether the given string starts with the given keyword.
366 * @src: Pointer to pointer to the string.
367 * @find: Pointer to the keyword.
369 * Returns true if @src starts with @find, false otherwise.
371 * The @src is updated to point the first character after the @find
372 * if @src starts with @find.
374 bool tomoyo_str_starts(char **src, const char *find)
376 const int len = strlen(find);
379 if (strncmp(tmp, find, len))
387 * tomoyo_normalize_line - Format string.
389 * @buffer: The line to normalize.
391 * Leading and trailing whitespaces are removed.
392 * Multiple whitespaces are packed into single space.
396 void tomoyo_normalize_line(unsigned char *buffer)
398 unsigned char *sp = buffer;
399 unsigned char *dp = buffer;
402 while (tomoyo_invalid(*sp))
408 while (tomoyo_valid(*sp))
410 while (tomoyo_invalid(*sp))
417 * tomoyo_correct_word2 - Validate a string.
419 * @string: The string to check. Maybe non-'\0'-terminated.
420 * @len: Length of @string.
422 * Check whether the given string follows the naming rules.
423 * Returns true if @string follows the naming rules, false otherwise.
425 static bool tomoyo_correct_word2(const char *string, size_t len)
427 const char *const start = string;
428 bool in_repetition = false;
441 case '\\': /* "\\" */
454 case '{': /* "/\{" */
455 if (string - 3 < start || *(string - 3) != '/')
457 in_repetition = true;
459 case '}': /* "\}/" */
464 in_repetition = false;
466 case '0': /* "\ooo" */
470 if (!len-- || !len--)
474 if (d < '0' || d > '7' || e < '0' || e > '7')
476 c = tomoyo_make_byte(c, d, e);
477 if (c <= ' ' || c >= 127)
481 } else if (in_repetition && c == '/') {
483 } else if (c <= ' ' || c >= 127) {
495 * tomoyo_correct_word - Validate a string.
497 * @string: The string to check.
499 * Check whether the given string follows the naming rules.
500 * Returns true if @string follows the naming rules, false otherwise.
502 bool tomoyo_correct_word(const char *string)
504 return tomoyo_correct_word2(string, strlen(string));
508 * tomoyo_correct_path - Validate a pathname.
510 * @filename: The pathname to check.
512 * Check whether the given pathname follows the naming rules.
513 * Returns true if @filename follows the naming rules, false otherwise.
515 bool tomoyo_correct_path(const char *filename)
517 return *filename == '/' && tomoyo_correct_word(filename);
521 * tomoyo_correct_domain - Check whether the given domainname follows the naming rules.
523 * @domainname: The domainname to check.
525 * Returns true if @domainname follows the naming rules, false otherwise.
527 bool tomoyo_correct_domain(const unsigned char *domainname)
529 if (!domainname || !tomoyo_domain_def(domainname))
531 domainname = strchr(domainname, ' ');
535 const unsigned char *cp = strchr(domainname, ' ');
538 if (*domainname != '/' ||
539 !tomoyo_correct_word2(domainname, cp - domainname))
543 return tomoyo_correct_path(domainname);
547 * tomoyo_domain_def - Check whether the given token can be a domainname.
549 * @buffer: The token to check.
551 * Returns true if @buffer possibly be a domainname, false otherwise.
553 bool tomoyo_domain_def(const unsigned char *buffer)
555 const unsigned char *cp;
559 cp = strchr(buffer, ' ');
561 len = strlen(buffer);
564 if (buffer[len - 1] != '>' ||
565 !tomoyo_correct_word2(buffer + 1, len - 2))
571 * tomoyo_find_domain - Find a domain by the given name.
573 * @domainname: The domainname to find.
575 * Returns pointer to "struct tomoyo_domain_info" if found, NULL otherwise.
577 * Caller holds tomoyo_read_lock().
579 struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname)
581 struct tomoyo_domain_info *domain;
582 struct tomoyo_path_info name;
584 name.name = domainname;
585 tomoyo_fill_path_info(&name);
586 list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
587 if (!domain->is_deleted &&
588 !tomoyo_pathcmp(&name, domain->domainname))
595 * tomoyo_const_part_length - Evaluate the initial length without a pattern in a token.
597 * @filename: The string to evaluate.
599 * Returns the initial length without a pattern in @filename.
601 static int tomoyo_const_part_length(const char *filename)
608 while ((c = *filename++) != '\0') {
615 case '\\': /* "\\" */
618 case '0': /* "\ooo" */
623 if (c < '0' || c > '7')
626 if (c < '0' || c > '7')
637 * tomoyo_fill_path_info - Fill in "struct tomoyo_path_info" members.
639 * @ptr: Pointer to "struct tomoyo_path_info" to fill in.
641 * The caller sets "struct tomoyo_path_info"->name.
643 void tomoyo_fill_path_info(struct tomoyo_path_info *ptr)
645 const char *name = ptr->name;
646 const int len = strlen(name);
648 ptr->const_len = tomoyo_const_part_length(name);
649 ptr->is_dir = len && (name[len - 1] == '/');
650 ptr->is_patterned = (ptr->const_len < len);
651 ptr->hash = full_name_hash(NULL, name, len);
655 * tomoyo_file_matches_pattern2 - Pattern matching without '/' character and "\-" pattern.
657 * @filename: The start of string to check.
658 * @filename_end: The end of string to check.
659 * @pattern: The start of pattern to compare.
660 * @pattern_end: The end of pattern to compare.
662 * Returns true if @filename matches @pattern, false otherwise.
664 static bool tomoyo_file_matches_pattern2(const char *filename,
665 const char *filename_end,
667 const char *pattern_end)
669 while (filename < filename_end && pattern < pattern_end) {
671 if (*pattern != '\\') {
672 if (*filename++ != *pattern++)
684 } else if (c == '\\') {
685 if (filename[1] == '\\')
687 else if (tomoyo_byte_range(filename + 1))
696 if (*++filename != '\\')
708 if (!tomoyo_alphabet_char(c))
715 if (c == '\\' && tomoyo_byte_range(filename + 1)
716 && strncmp(filename + 1, pattern, 3) == 0) {
721 return false; /* Not matched. */
724 for (i = 0; i <= filename_end - filename; i++) {
725 if (tomoyo_file_matches_pattern2(
726 filename + i, filename_end,
727 pattern + 1, pattern_end))
730 if (c == '.' && *pattern == '@')
734 if (filename[i + 1] == '\\')
736 else if (tomoyo_byte_range(filename + i + 1))
739 break; /* Bad pattern. */
741 return false; /* Not matched. */
746 while (isdigit(filename[j]))
748 } else if (c == 'X') {
749 while (isxdigit(filename[j]))
751 } else if (c == 'A') {
752 while (tomoyo_alphabet_char(filename[j]))
755 for (i = 1; i <= j; i++) {
756 if (tomoyo_file_matches_pattern2(
757 filename + i, filename_end,
758 pattern + 1, pattern_end))
761 return false; /* Not matched or bad pattern. */
766 while (*pattern == '\\' &&
767 (*(pattern + 1) == '*' || *(pattern + 1) == '@'))
769 return filename == filename_end && pattern == pattern_end;
773 * tomoyo_file_matches_pattern - Pattern matching without '/' character.
775 * @filename: The start of string to check.
776 * @filename_end: The end of string to check.
777 * @pattern: The start of pattern to compare.
778 * @pattern_end: The end of pattern to compare.
780 * Returns true if @filename matches @pattern, false otherwise.
782 static bool tomoyo_file_matches_pattern(const char *filename,
783 const char *filename_end,
785 const char *pattern_end)
787 const char *pattern_start = pattern;
791 while (pattern < pattern_end - 1) {
792 /* Split at "\-" pattern. */
793 if (*pattern++ != '\\' || *pattern++ != '-')
795 result = tomoyo_file_matches_pattern2(filename,
804 pattern_start = pattern;
806 result = tomoyo_file_matches_pattern2(filename, filename_end,
807 pattern_start, pattern_end);
808 return first ? result : !result;
812 * tomoyo_path_matches_pattern2 - Do pathname pattern matching.
814 * @f: The start of string to check.
815 * @p: The start of pattern to compare.
817 * Returns true if @f matches @p, false otherwise.
819 static bool tomoyo_path_matches_pattern2(const char *f, const char *p)
821 const char *f_delimiter;
822 const char *p_delimiter;
825 f_delimiter = strchr(f, '/');
827 f_delimiter = f + strlen(f);
828 p_delimiter = strchr(p, '/');
830 p_delimiter = p + strlen(p);
831 if (*p == '\\' && *(p + 1) == '{')
833 if (!tomoyo_file_matches_pattern(f, f_delimiter, p,
843 /* Ignore trailing "\*" and "\@" in @pattern. */
845 (*(p + 1) == '*' || *(p + 1) == '@'))
850 * The "\{" pattern is permitted only after '/' character.
851 * This guarantees that below "*(p - 1)" is safe.
852 * Also, the "\}" pattern is permitted only before '/' character
853 * so that "\{" + "\}" pair will not break the "\-" operator.
855 if (*(p - 1) != '/' || p_delimiter <= p + 3 || *p_delimiter != '/' ||
856 *(p_delimiter - 1) != '}' || *(p_delimiter - 2) != '\\')
857 return false; /* Bad pattern. */
859 /* Compare current component with pattern. */
860 if (!tomoyo_file_matches_pattern(f, f_delimiter, p + 2,
863 /* Proceed to next component. */
868 /* Continue comparison. */
869 if (tomoyo_path_matches_pattern2(f, p_delimiter + 1))
871 f_delimiter = strchr(f, '/');
872 } while (f_delimiter);
873 return false; /* Not matched. */
877 * tomoyo_path_matches_pattern - Check whether the given filename matches the given pattern.
879 * @filename: The filename to check.
880 * @pattern: The pattern to compare.
882 * Returns true if matches, false otherwise.
884 * The following patterns are available.
886 * \ooo Octal representation of a byte.
887 * \* Zero or more repetitions of characters other than '/'.
888 * \@ Zero or more repetitions of characters other than '/' or '.'.
889 * \? 1 byte character other than '/'.
890 * \$ One or more repetitions of decimal digits.
891 * \+ 1 decimal digit.
892 * \X One or more repetitions of hexadecimal digits.
893 * \x 1 hexadecimal digit.
894 * \A One or more repetitions of alphabet characters.
895 * \a 1 alphabet character.
897 * \- Subtraction operator.
899 * /\{dir\}/ '/' + 'One or more repetitions of dir/' (e.g. /dir/ /dir/dir/
902 bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
903 const struct tomoyo_path_info *pattern)
905 const char *f = filename->name;
906 const char *p = pattern->name;
907 const int len = pattern->const_len;
909 /* If @pattern doesn't contain pattern, I can use strcmp(). */
910 if (!pattern->is_patterned)
911 return !tomoyo_pathcmp(filename, pattern);
912 /* Don't compare directory and non-directory. */
913 if (filename->is_dir != pattern->is_dir)
915 /* Compare the initial length without patterns. */
916 if (strncmp(f, p, len))
920 return tomoyo_path_matches_pattern2(f, p);
924 * tomoyo_get_exe - Get tomoyo_realpath() of current process.
926 * Returns the tomoyo_realpath() of current process on success, NULL otherwise.
928 * This function uses kzalloc(), so the caller must call kfree()
929 * if this function didn't return NULL.
931 const char *tomoyo_get_exe(void)
933 struct file *exe_file;
935 struct mm_struct *mm = current->mm;
939 exe_file = get_mm_exe_file(mm);
943 cp = tomoyo_realpath_from_path(&exe_file->f_path);
949 * tomoyo_get_mode - Get MAC mode.
951 * @ns: Pointer to "struct tomoyo_policy_namespace".
952 * @profile: Profile number.
953 * @index: Index number of functionality.
957 int tomoyo_get_mode(const struct tomoyo_policy_namespace *ns, const u8 profile,
961 struct tomoyo_profile *p;
963 if (!tomoyo_policy_loaded)
964 return TOMOYO_CONFIG_DISABLED;
965 p = tomoyo_profile(ns, profile);
966 mode = p->config[index];
967 if (mode == TOMOYO_CONFIG_USE_DEFAULT)
968 mode = p->config[tomoyo_index2category[index]
969 + TOMOYO_MAX_MAC_INDEX];
970 if (mode == TOMOYO_CONFIG_USE_DEFAULT)
971 mode = p->default_config;
976 * tomoyo_init_request_info - Initialize "struct tomoyo_request_info" members.
978 * @r: Pointer to "struct tomoyo_request_info" to initialize.
979 * @domain: Pointer to "struct tomoyo_domain_info". NULL for tomoyo_domain().
980 * @index: Index number of functionality.
984 int tomoyo_init_request_info(struct tomoyo_request_info *r,
985 struct tomoyo_domain_info *domain, const u8 index)
988 memset(r, 0, sizeof(*r));
990 domain = tomoyo_domain();
992 profile = domain->profile;
993 r->profile = profile;
995 r->mode = tomoyo_get_mode(domain->ns, profile, index);
1000 * tomoyo_domain_quota_is_ok - Check for domain's quota.
1002 * @r: Pointer to "struct tomoyo_request_info".
1004 * Returns true if the domain is not exceeded quota, false otherwise.
1006 * Caller holds tomoyo_read_lock().
1008 bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r)
1010 unsigned int count = 0;
1011 struct tomoyo_domain_info *domain = r->domain;
1012 struct tomoyo_acl_info *ptr;
1014 if (r->mode != TOMOYO_CONFIG_LEARNING)
1018 list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) {
1021 if (ptr->is_deleted)
1023 switch (ptr->type) {
1024 case TOMOYO_TYPE_PATH_ACL:
1025 perm = container_of(ptr, struct tomoyo_path_acl, head)
1028 case TOMOYO_TYPE_PATH2_ACL:
1029 perm = container_of(ptr, struct tomoyo_path2_acl, head)
1032 case TOMOYO_TYPE_PATH_NUMBER_ACL:
1033 perm = container_of(ptr, struct tomoyo_path_number_acl,
1036 case TOMOYO_TYPE_MKDEV_ACL:
1037 perm = container_of(ptr, struct tomoyo_mkdev_acl,
1040 case TOMOYO_TYPE_INET_ACL:
1041 perm = container_of(ptr, struct tomoyo_inet_acl,
1044 case TOMOYO_TYPE_UNIX_ACL:
1045 perm = container_of(ptr, struct tomoyo_unix_acl,
1048 case TOMOYO_TYPE_MANUAL_TASK_ACL:
1054 for (i = 0; i < 16; i++)
1055 if (perm & (1 << i))
1058 if (count < tomoyo_profile(domain->ns, domain->profile)->
1059 pref[TOMOYO_PREF_MAX_LEARNING_ENTRY])
1061 if (!domain->flags[TOMOYO_DIF_QUOTA_WARNED]) {
1062 domain->flags[TOMOYO_DIF_QUOTA_WARNED] = true;
1063 /* r->granted = false; */
1064 tomoyo_write_log(r, "%s", tomoyo_dif[TOMOYO_DIF_QUOTA_WARNED]);
1065 printk(KERN_WARNING "WARNING: "
1066 "Domain '%s' has too many ACLs to hold. "
1067 "Stopped learning mode.\n", domain->domainname->name);