TOMOYO: Split files into some pieces.
authorTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Mon, 17 May 2010 01:12:46 +0000 (10:12 +0900)
committerJames Morris <jmorris@namei.org>
Mon, 2 Aug 2010 05:33:39 +0000 (15:33 +1000)
security/tomoyo/common.c became too large to read.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
security/tomoyo/Makefile
security/tomoyo/common.c
security/tomoyo/common.h
security/tomoyo/domain.c
security/tomoyo/file.c
security/tomoyo/load_policy.c [new file with mode: 0644]
security/tomoyo/memory.c [new file with mode: 0644]
security/tomoyo/realpath.c
security/tomoyo/securityfs_if.c [new file with mode: 0644]
security/tomoyo/tomoyo.c
security/tomoyo/util.c [new file with mode: 0644]

index d7befab40eff2a8feec1cf1738bbca79ef0f0552..3aa6f076948e4f06d37f9b43f10a7a7353134b23 100644 (file)
@@ -1 +1 @@
-obj-y = common.o realpath.o tomoyo.o domain.o file.o gc.o path_group.o number_group.o mount.o
+obj-y = common.o domain.o file.o gc.o load_policy.o memory.o mount.o number_group.o path_group.o realpath.o securityfs_if.o tomoyo.o util.o
index ee46aaa3566fa40d1a849967edf47af7b4be19db..57ddfc5d9c52ad83daff4b378499dc89c6cffca4 100644 (file)
@@ -3,10 +3,7 @@
  *
  * Common functions for TOMOYO.
  *
- * Copyright (C) 2005-2009  NTT DATA CORPORATION
- *
- * Version: 2.2.0   2009/04/01
- *
+ * Copyright (C) 2005-2010  NTT DATA CORPORATION
  */
 
 #include <linux/uaccess.h>
 #include <linux/hardirq.h>
 #include "common.h"
 
-/* Lock for protecting policy. */
-DEFINE_MUTEX(tomoyo_policy_lock);
-
-/* Has loading policy done? */
-bool tomoyo_policy_loaded;
-
 /* String table for functionality that takes 4 modes. */
 static const char *tomoyo_mode_4[4] = {
        "disabled", "learning", "permissive", "enforcing"
@@ -64,42 +55,6 @@ static bool tomoyo_manage_by_non_root;
 
 /* Utility functions. */
 
-/* Open operation for /sys/kernel/security/tomoyo/ interface. */
-static int tomoyo_open_control(const u8 type, struct file *file);
-/* Close /sys/kernel/security/tomoyo/ interface. */
-static int tomoyo_close_control(struct file *file);
-/* Read operation for /sys/kernel/security/tomoyo/ interface. */
-static int tomoyo_read_control(struct file *file, char __user *buffer,
-                              const int buffer_len);
-/* Write operation for /sys/kernel/security/tomoyo/ interface. */
-static int tomoyo_write_control(struct file *file, const char __user *buffer,
-                               const int buffer_len);
-/* Check whether the domain has too many ACL entries to hold. */
-static bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
-
-/**
- * tomoyo_parse_name_union - Parse a tomoyo_name_union.
- *
- * @filename: Name or name group.
- * @ptr:      Pointer to "struct tomoyo_name_union".
- *
- * Returns true on success, false otherwise.
- */
-bool tomoyo_parse_name_union(const char *filename,
-                            struct tomoyo_name_union *ptr)
-{
-       if (!tomoyo_is_correct_path(filename, 0, 0, 0))
-               return false;
-       if (filename[0] == '@') {
-               ptr->group = tomoyo_get_path_group(filename + 1);
-               ptr->is_group = true;
-               return ptr->group != NULL;
-       }
-       ptr->filename = tomoyo_get_name(filename);
-       ptr->is_group = false;
-       return ptr->filename != NULL;
-}
-
 /**
  * tomoyo_print_name_union - Print a tomoyo_name_union.
  *
@@ -120,69 +75,6 @@ static bool tomoyo_print_name_union(struct tomoyo_io_buffer *head,
        return tomoyo_io_printf(head, " %s", ptr->filename->name);
 }
 
-/**
- * tomoyo_parse_ulong - Parse an "unsigned long" value.
- *
- * @result: Pointer to "unsigned long".
- * @str:    Pointer to string to parse.
- *
- * Returns value type on success, 0 otherwise.
- *
- * The @src is updated to point the first character after the value
- * on success.
- */
-u8 tomoyo_parse_ulong(unsigned long *result, char **str)
-{
-       const char *cp = *str;
-       char *ep;
-       int base = 10;
-       if (*cp == '0') {
-               char c = *(cp + 1);
-               if (c == 'x' || c == 'X') {
-                       base = 16;
-                       cp += 2;
-               } else if (c >= '0' && c <= '7') {
-                       base = 8;
-                       cp++;
-               }
-       }
-       *result = simple_strtoul(cp, &ep, base);
-       if (cp == ep)
-               return 0;
-       *str = ep;
-       switch (base) {
-       case 16:
-               return TOMOYO_VALUE_TYPE_HEXADECIMAL;
-       case 8:
-               return TOMOYO_VALUE_TYPE_OCTAL;
-       default:
-               return TOMOYO_VALUE_TYPE_DECIMAL;
-       }
-}
-
-/**
- * tomoyo_print_ulong - Print an "unsigned long" value.
- *
- * @buffer:     Pointer to buffer.
- * @buffer_len: Size of @buffer.
- * @value:      An "unsigned long" value.
- * @type:       Type of @value.
- *
- * Returns nothing.
- */
-void tomoyo_print_ulong(char *buffer, const int buffer_len,
-                       const unsigned long value, const u8 type)
-{
-       if (type == TOMOYO_VALUE_TYPE_DECIMAL)
-               snprintf(buffer, buffer_len, "%lu", value);
-       else if (type == TOMOYO_VALUE_TYPE_OCTAL)
-               snprintf(buffer, buffer_len, "0%lo", value);
-       else if (type == TOMOYO_VALUE_TYPE_HEXADECIMAL)
-               snprintf(buffer, buffer_len, "0x%lX", value);
-       else
-               snprintf(buffer, buffer_len, "type(%u)", type);
-}
-
 /**
  * tomoyo_print_number_union - Print a tomoyo_number_union.
  *
@@ -233,704 +125,6 @@ bool tomoyo_print_number_union(struct tomoyo_io_buffer *head,
        }
 }
 
-/**
- * tomoyo_parse_number_union - Parse a tomoyo_number_union.
- *
- * @data: Number or number range or number group.
- * @ptr:  Pointer to "struct tomoyo_number_union".
- *
- * Returns true on success, false otherwise.
- */
-bool tomoyo_parse_number_union(char *data, struct tomoyo_number_union *num)
-{
-       u8 type;
-       unsigned long v;
-       memset(num, 0, sizeof(*num));
-       if (data[0] == '@') {
-               if (!tomoyo_is_correct_path(data, 0, 0, 0))
-                       return false;
-               num->group = tomoyo_get_number_group(data + 1);
-               num->is_group = true;
-               return num->group != NULL;
-       }
-       type = tomoyo_parse_ulong(&v, &data);
-       if (!type)
-               return false;
-       num->values[0] = v;
-       num->min_type = type;
-       if (!*data) {
-               num->values[1] = v;
-               num->max_type = type;
-               return true;
-       }
-       if (*data++ != '-')
-               return false;
-       type = tomoyo_parse_ulong(&v, &data);
-       if (!type || *data)
-               return false;
-       num->values[1] = v;
-       num->max_type = type;
-       return true;
-}
-
-/**
- * tomoyo_is_byte_range - Check whether the string isa \ooo style octal value.
- *
- * @str: Pointer to the string.
- *
- * Returns true if @str is a \ooo style octal value, false otherwise.
- *
- * TOMOYO uses \ooo style representation for 0x01 - 0x20 and 0x7F - 0xFF.
- * This function verifies that \ooo is in valid range.
- */
-static inline bool tomoyo_is_byte_range(const char *str)
-{
-       return *str >= '0' && *str++ <= '3' &&
-               *str >= '0' && *str++ <= '7' &&
-               *str >= '0' && *str <= '7';
-}
-
-/**
- * tomoyo_is_alphabet_char - Check whether the character is an alphabet.
- *
- * @c: The character to check.
- *
- * Returns true if @c is an alphabet character, false otherwise.
- */
-static inline bool tomoyo_is_alphabet_char(const char c)
-{
-       return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
-}
-
-/**
- * tomoyo_make_byte - Make byte value from three octal characters.
- *
- * @c1: The first character.
- * @c2: The second character.
- * @c3: The third character.
- *
- * Returns byte value.
- */
-static inline u8 tomoyo_make_byte(const u8 c1, const u8 c2, const u8 c3)
-{
-       return ((c1 - '0') << 6) + ((c2 - '0') << 3) + (c3 - '0');
-}
-
-/**
- * tomoyo_str_starts - Check whether the given string starts with the given keyword.
- *
- * @src:  Pointer to pointer to the string.
- * @find: Pointer to the keyword.
- *
- * Returns true if @src starts with @find, false otherwise.
- *
- * The @src is updated to point the first character after the @find
- * if @src starts with @find.
- */
-static bool tomoyo_str_starts(char **src, const char *find)
-{
-       const int len = strlen(find);
-       char *tmp = *src;
-
-       if (strncmp(tmp, find, len))
-               return false;
-       tmp += len;
-       *src = tmp;
-       return true;
-}
-
-/**
- * tomoyo_normalize_line - Format string.
- *
- * @buffer: The line to normalize.
- *
- * Leading and trailing whitespaces are removed.
- * Multiple whitespaces are packed into single space.
- *
- * Returns nothing.
- */
-static void tomoyo_normalize_line(unsigned char *buffer)
-{
-       unsigned char *sp = buffer;
-       unsigned char *dp = buffer;
-       bool first = true;
-
-       while (tomoyo_is_invalid(*sp))
-               sp++;
-       while (*sp) {
-               if (!first)
-                       *dp++ = ' ';
-               first = false;
-               while (tomoyo_is_valid(*sp))
-                       *dp++ = *sp++;
-               while (tomoyo_is_invalid(*sp))
-                       sp++;
-       }
-       *dp = '\0';
-}
-
-/**
- * tomoyo_tokenize - Tokenize string.
- *
- * @buffer: The line to tokenize.
- * @w:      Pointer to "char *".
- * @size:   Sizeof @w .
- *
- * Returns true on success, false otherwise.
- */
-bool tomoyo_tokenize(char *buffer, char *w[], size_t size)
-{
-       int count = size / sizeof(char *);
-       int i;
-       for (i = 0; i < count; i++)
-               w[i] = "";
-       for (i = 0; i < count; i++) {
-               char *cp = strchr(buffer, ' ');
-               if (cp)
-                       *cp = '\0';
-               w[i] = buffer;
-               if (!cp)
-                       break;
-               buffer = cp + 1;
-       }
-       return i < count || !*buffer;
-}
-
-/**
- * tomoyo_is_correct_path - Validate a pathname.
- * @filename:     The pathname to check.
- * @start_type:   Should the pathname start with '/'?
- *                1 = must / -1 = must not / 0 = don't care
- * @pattern_type: Can the pathname contain a wildcard?
- *                1 = must / -1 = must not / 0 = don't care
- * @end_type:     Should the pathname end with '/'?
- *                1 = must / -1 = must not / 0 = don't care
- *
- * Check whether the given filename follows the naming rules.
- * Returns true if @filename follows the naming rules, false otherwise.
- */
-bool tomoyo_is_correct_path(const char *filename, const s8 start_type,
-                           const s8 pattern_type, const s8 end_type)
-{
-       const char *const start = filename;
-       bool in_repetition = false;
-       bool contains_pattern = false;
-       unsigned char c;
-       unsigned char d;
-       unsigned char e;
-
-       if (!filename)
-               goto out;
-       c = *filename;
-       if (start_type == 1) { /* Must start with '/' */
-               if (c != '/')
-                       goto out;
-       } else if (start_type == -1) { /* Must not start with '/' */
-               if (c == '/')
-                       goto out;
-       }
-       if (c)
-               c = *(filename + strlen(filename) - 1);
-       if (end_type == 1) { /* Must end with '/' */
-               if (c != '/')
-                       goto out;
-       } else if (end_type == -1) { /* Must not end with '/' */
-               if (c == '/')
-                       goto out;
-       }
-       while (1) {
-               c = *filename++;
-               if (!c)
-                       break;
-               if (c == '\\') {
-                       c = *filename++;
-                       switch (c) {
-                       case '\\':  /* "\\" */
-                               continue;
-                       case '$':   /* "\$" */
-                       case '+':   /* "\+" */
-                       case '?':   /* "\?" */
-                       case '*':   /* "\*" */
-                       case '@':   /* "\@" */
-                       case 'x':   /* "\x" */
-                       case 'X':   /* "\X" */
-                       case 'a':   /* "\a" */
-                       case 'A':   /* "\A" */
-                       case '-':   /* "\-" */
-                               if (pattern_type == -1)
-                                       break; /* Must not contain pattern */
-                               contains_pattern = true;
-                               continue;
-                       case '{':   /* "/\{" */
-                               if (filename - 3 < start ||
-                                   *(filename - 3) != '/')
-                                       break;
-                               if (pattern_type == -1)
-                                       break; /* Must not contain pattern */
-                               contains_pattern = true;
-                               in_repetition = true;
-                               continue;
-                       case '}':   /* "\}/" */
-                               if (*filename != '/')
-                                       break;
-                               if (!in_repetition)
-                                       break;
-                               in_repetition = false;
-                               continue;
-                       case '0':   /* "\ooo" */
-                       case '1':
-                       case '2':
-                       case '3':
-                               d = *filename++;
-                               if (d < '0' || d > '7')
-                                       break;
-                               e = *filename++;
-                               if (e < '0' || e > '7')
-                                       break;
-                               c = tomoyo_make_byte(c, d, e);
-                               if (tomoyo_is_invalid(c))
-                                       continue; /* pattern is not \000 */
-                       }
-                       goto out;
-               } else if (in_repetition && c == '/') {
-                       goto out;
-               } else if (tomoyo_is_invalid(c)) {
-                       goto out;
-               }
-       }
-       if (pattern_type == 1) { /* Must contain pattern */
-               if (!contains_pattern)
-                       goto out;
-       }
-       if (in_repetition)
-               goto out;
-       return true;
- out:
-       return false;
-}
-
-/**
- * tomoyo_is_correct_domain - Check whether the given domainname follows the naming rules.
- * @domainname:   The domainname to check.
- *
- * Returns true if @domainname follows the naming rules, false otherwise.
- */
-bool tomoyo_is_correct_domain(const unsigned char *domainname)
-{
-       unsigned char c;
-       unsigned char d;
-       unsigned char e;
-
-       if (!domainname || strncmp(domainname, TOMOYO_ROOT_NAME,
-                                  TOMOYO_ROOT_NAME_LEN))
-               goto out;
-       domainname += TOMOYO_ROOT_NAME_LEN;
-       if (!*domainname)
-               return true;
-       do {
-               if (*domainname++ != ' ')
-                       goto out;
-               if (*domainname++ != '/')
-                       goto out;
-               while ((c = *domainname) != '\0' && c != ' ') {
-                       domainname++;
-                       if (c == '\\') {
-                               c = *domainname++;
-                               switch ((c)) {
-                               case '\\':  /* "\\" */
-                                       continue;
-                               case '0':   /* "\ooo" */
-                               case '1':
-                               case '2':
-                               case '3':
-                                       d = *domainname++;
-                                       if (d < '0' || d > '7')
-                                               break;
-                                       e = *domainname++;
-                                       if (e < '0' || e > '7')
-                                               break;
-                                       c = tomoyo_make_byte(c, d, e);
-                                       if (tomoyo_is_invalid(c))
-                                               /* pattern is not \000 */
-                                               continue;
-                               }
-                               goto out;
-                       } else if (tomoyo_is_invalid(c)) {
-                               goto out;
-                       }
-               }
-       } while (*domainname);
-       return true;
- out:
-       return false;
-}
-
-/**
- * tomoyo_is_domain_def - Check whether the given token can be a domainname.
- *
- * @buffer: The token to check.
- *
- * Returns true if @buffer possibly be a domainname, false otherwise.
- */
-bool tomoyo_is_domain_def(const unsigned char *buffer)
-{
-       return !strncmp(buffer, TOMOYO_ROOT_NAME, TOMOYO_ROOT_NAME_LEN);
-}
-
-/**
- * tomoyo_find_domain - Find a domain by the given name.
- *
- * @domainname: The domainname to find.
- *
- * Returns pointer to "struct tomoyo_domain_info" if found, NULL otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname)
-{
-       struct tomoyo_domain_info *domain;
-       struct tomoyo_path_info name;
-
-       name.name = domainname;
-       tomoyo_fill_path_info(&name);
-       list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
-               if (!domain->is_deleted &&
-                   !tomoyo_pathcmp(&name, domain->domainname))
-                       return domain;
-       }
-       return NULL;
-}
-
-/**
- * tomoyo_const_part_length - Evaluate the initial length without a pattern in a token.
- *
- * @filename: The string to evaluate.
- *
- * Returns the initial length without a pattern in @filename.
- */
-static int tomoyo_const_part_length(const char *filename)
-{
-       char c;
-       int len = 0;
-
-       if (!filename)
-               return 0;
-       while ((c = *filename++) != '\0') {
-               if (c != '\\') {
-                       len++;
-                       continue;
-               }
-               c = *filename++;
-               switch (c) {
-               case '\\':  /* "\\" */
-                       len += 2;
-                       continue;
-               case '0':   /* "\ooo" */
-               case '1':
-               case '2':
-               case '3':
-                       c = *filename++;
-                       if (c < '0' || c > '7')
-                               break;
-                       c = *filename++;
-                       if (c < '0' || c > '7')
-                               break;
-                       len += 4;
-                       continue;
-               }
-               break;
-       }
-       return len;
-}
-
-/**
- * tomoyo_fill_path_info - Fill in "struct tomoyo_path_info" members.
- *
- * @ptr: Pointer to "struct tomoyo_path_info" to fill in.
- *
- * The caller sets "struct tomoyo_path_info"->name.
- */
-void tomoyo_fill_path_info(struct tomoyo_path_info *ptr)
-{
-       const char *name = ptr->name;
-       const int len = strlen(name);
-
-       ptr->const_len = tomoyo_const_part_length(name);
-       ptr->is_dir = len && (name[len - 1] == '/');
-       ptr->is_patterned = (ptr->const_len < len);
-       ptr->hash = full_name_hash(name, len);
-}
-
-/**
- * tomoyo_file_matches_pattern2 - Pattern matching without '/' character
- * and "\-" pattern.
- *
- * @filename:     The start of string to check.
- * @filename_end: The end of string to check.
- * @pattern:      The start of pattern to compare.
- * @pattern_end:  The end of pattern to compare.
- *
- * Returns true if @filename matches @pattern, false otherwise.
- */
-static bool tomoyo_file_matches_pattern2(const char *filename,
-                                        const char *filename_end,
-                                        const char *pattern,
-                                        const char *pattern_end)
-{
-       while (filename < filename_end && pattern < pattern_end) {
-               char c;
-               if (*pattern != '\\') {
-                       if (*filename++ != *pattern++)
-                               return false;
-                       continue;
-               }
-               c = *filename;
-               pattern++;
-               switch (*pattern) {
-                       int i;
-                       int j;
-               case '?':
-                       if (c == '/') {
-                               return false;
-                       } else if (c == '\\') {
-                               if (filename[1] == '\\')
-                                       filename++;
-                               else if (tomoyo_is_byte_range(filename + 1))
-                                       filename += 3;
-                               else
-                                       return false;
-                       }
-                       break;
-               case '\\':
-                       if (c != '\\')
-                               return false;
-                       if (*++filename != '\\')
-                               return false;
-                       break;
-               case '+':
-                       if (!isdigit(c))
-                               return false;
-                       break;
-               case 'x':
-                       if (!isxdigit(c))
-                               return false;
-                       break;
-               case 'a':
-                       if (!tomoyo_is_alphabet_char(c))
-                               return false;
-                       break;
-               case '0':
-               case '1':
-               case '2':
-               case '3':
-                       if (c == '\\' && tomoyo_is_byte_range(filename + 1)
-                           && strncmp(filename + 1, pattern, 3) == 0) {
-                               filename += 3;
-                               pattern += 2;
-                               break;
-                       }
-                       return false; /* Not matched. */
-               case '*':
-               case '@':
-                       for (i = 0; i <= filename_end - filename; i++) {
-                               if (tomoyo_file_matches_pattern2(
-                                                   filename + i, filename_end,
-                                                   pattern + 1, pattern_end))
-                                       return true;
-                               c = filename[i];
-                               if (c == '.' && *pattern == '@')
-                                       break;
-                               if (c != '\\')
-                                       continue;
-                               if (filename[i + 1] == '\\')
-                                       i++;
-                               else if (tomoyo_is_byte_range(filename + i + 1))
-                                       i += 3;
-                               else
-                                       break; /* Bad pattern. */
-                       }
-                       return false; /* Not matched. */
-               default:
-                       j = 0;
-                       c = *pattern;
-                       if (c == '$') {
-                               while (isdigit(filename[j]))
-                                       j++;
-                       } else if (c == 'X') {
-                               while (isxdigit(filename[j]))
-                                       j++;
-                       } else if (c == 'A') {
-                               while (tomoyo_is_alphabet_char(filename[j]))
-                                       j++;
-                       }
-                       for (i = 1; i <= j; i++) {
-                               if (tomoyo_file_matches_pattern2(
-                                                   filename + i, filename_end,
-                                                   pattern + 1, pattern_end))
-                                       return true;
-                       }
-                       return false; /* Not matched or bad pattern. */
-               }
-               filename++;
-               pattern++;
-       }
-       while (*pattern == '\\' &&
-              (*(pattern + 1) == '*' || *(pattern + 1) == '@'))
-               pattern += 2;
-       return filename == filename_end && pattern == pattern_end;
-}
-
-/**
- * tomoyo_file_matches_pattern - Pattern matching without without '/' character.
- *
- * @filename:     The start of string to check.
- * @filename_end: The end of string to check.
- * @pattern:      The start of pattern to compare.
- * @pattern_end:  The end of pattern to compare.
- *
- * Returns true if @filename matches @pattern, false otherwise.
- */
-static bool tomoyo_file_matches_pattern(const char *filename,
-                                          const char *filename_end,
-                                          const char *pattern,
-                                          const char *pattern_end)
-{
-       const char *pattern_start = pattern;
-       bool first = true;
-       bool result;
-
-       while (pattern < pattern_end - 1) {
-               /* Split at "\-" pattern. */
-               if (*pattern++ != '\\' || *pattern++ != '-')
-                       continue;
-               result = tomoyo_file_matches_pattern2(filename,
-                                                     filename_end,
-                                                     pattern_start,
-                                                     pattern - 2);
-               if (first)
-                       result = !result;
-               if (result)
-                       return false;
-               first = false;
-               pattern_start = pattern;
-       }
-       result = tomoyo_file_matches_pattern2(filename, filename_end,
-                                             pattern_start, pattern_end);
-       return first ? result : !result;
-}
-
-/**
- * tomoyo_path_matches_pattern2 - Do pathname pattern matching.
- *
- * @f: The start of string to check.
- * @p: The start of pattern to compare.
- *
- * Returns true if @f matches @p, false otherwise.
- */
-static bool tomoyo_path_matches_pattern2(const char *f, const char *p)
-{
-       const char *f_delimiter;
-       const char *p_delimiter;
-
-       while (*f && *p) {
-               f_delimiter = strchr(f, '/');
-               if (!f_delimiter)
-                       f_delimiter = f + strlen(f);
-               p_delimiter = strchr(p, '/');
-               if (!p_delimiter)
-                       p_delimiter = p + strlen(p);
-               if (*p == '\\' && *(p + 1) == '{')
-                       goto recursive;
-               if (!tomoyo_file_matches_pattern(f, f_delimiter, p,
-                                                p_delimiter))
-                       return false;
-               f = f_delimiter;
-               if (*f)
-                       f++;
-               p = p_delimiter;
-               if (*p)
-                       p++;
-       }
-       /* Ignore trailing "\*" and "\@" in @pattern. */
-       while (*p == '\\' &&
-              (*(p + 1) == '*' || *(p + 1) == '@'))
-               p += 2;
-       return !*f && !*p;
- recursive:
-       /*
-        * The "\{" pattern is permitted only after '/' character.
-        * This guarantees that below "*(p - 1)" is safe.
-        * Also, the "\}" pattern is permitted only before '/' character
-        * so that "\{" + "\}" pair will not break the "\-" operator.
-        */
-       if (*(p - 1) != '/' || p_delimiter <= p + 3 || *p_delimiter != '/' ||
-           *(p_delimiter - 1) != '}' || *(p_delimiter - 2) != '\\')
-               return false; /* Bad pattern. */
-       do {
-               /* Compare current component with pattern. */
-               if (!tomoyo_file_matches_pattern(f, f_delimiter, p + 2,
-                                                p_delimiter - 2))
-                       break;
-               /* Proceed to next component. */
-               f = f_delimiter;
-               if (!*f)
-                       break;
-               f++;
-               /* Continue comparison. */
-               if (tomoyo_path_matches_pattern2(f, p_delimiter + 1))
-                       return true;
-               f_delimiter = strchr(f, '/');
-       } while (f_delimiter);
-       return false; /* Not matched. */
-}
-
-/**
- * tomoyo_path_matches_pattern - Check whether the given filename matches the given pattern.
- *
- * @filename: The filename to check.
- * @pattern:  The pattern to compare.
- *
- * Returns true if matches, false otherwise.
- *
- * The following patterns are available.
- *   \\     \ itself.
- *   \ooo   Octal representation of a byte.
- *   \*     Zero or more repetitions of characters other than '/'.
- *   \@     Zero or more repetitions of characters other than '/' or '.'.
- *   \?     1 byte character other than '/'.
- *   \$     One or more repetitions of decimal digits.
- *   \+     1 decimal digit.
- *   \X     One or more repetitions of hexadecimal digits.
- *   \x     1 hexadecimal digit.
- *   \A     One or more repetitions of alphabet characters.
- *   \a     1 alphabet character.
- *
- *   \-     Subtraction operator.
- *
- *   /\{dir\}/   '/' + 'One or more repetitions of dir/' (e.g. /dir/ /dir/dir/
- *               /dir/dir/dir/ ).
- */
-bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
-                                const struct tomoyo_path_info *pattern)
-{
-       const char *f = filename->name;
-       const char *p = pattern->name;
-       const int len = pattern->const_len;
-
-       /* If @pattern doesn't contain pattern, I can use strcmp(). */
-       if (!pattern->is_patterned)
-               return !tomoyo_pathcmp(filename, pattern);
-       /* Don't compare directory and non-directory. */
-       if (filename->is_dir != pattern->is_dir)
-               return false;
-       /* Compare the initial length without patterns. */
-       if (strncmp(f, p, len))
-               return false;
-       f += len;
-       p += len;
-       return tomoyo_path_matches_pattern2(f, p);
-}
-
 /**
  * tomoyo_io_printf - Transactional printf() to "struct tomoyo_io_buffer" structure.
  *
@@ -959,33 +153,6 @@ bool tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...)
        return true;
 }
 
-/**
- * tomoyo_get_exe - Get tomoyo_realpath() of current process.
- *
- * Returns the tomoyo_realpath() of current process on success, NULL otherwise.
- *
- * This function uses kzalloc(), so the caller must call kfree()
- * if this function didn't return NULL.
- */
-static const char *tomoyo_get_exe(void)
-{
-       struct mm_struct *mm = current->mm;
-       struct vm_area_struct *vma;
-       const char *cp = NULL;
-
-       if (!mm)
-               return NULL;
-       down_read(&mm->mmap_sem);
-       for (vma = mm->mmap; vma; vma = vma->vm_next) {
-               if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) {
-                       cp = tomoyo_realpath_from_path(&vma->vm_file->f_path);
-                       break;
-               }
-       }
-       up_read(&mm->mmap_sem);
-       return cp;
-}
-
 /**
  * tomoyo_check_flags - Check mode for specified functionality.
  *
@@ -1024,76 +191,6 @@ bool tomoyo_verbose_mode(const struct tomoyo_domain_info *domain)
        return tomoyo_check_flags(domain, TOMOYO_VERBOSE) != 0;
 }
 
-/**
- * tomoyo_domain_quota_is_ok - Check for domain's quota.
- *
- * @r: Pointer to "struct tomoyo_request_info".
- *
- * Returns true if the domain is not exceeded quota, false otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-static bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r)
-{
-       unsigned int count = 0;
-       struct tomoyo_domain_info *domain = r->domain;
-       struct tomoyo_acl_info *ptr;
-
-       if (r->mode != TOMOYO_CONFIG_LEARNING)
-               return false;
-       if (!domain)
-               return true;
-       list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) {
-               switch (ptr->type) {
-                       u16 perm;
-                       u8 i;
-               case TOMOYO_TYPE_PATH_ACL:
-                       perm = container_of(ptr, struct tomoyo_path_acl, head)
-                               ->perm;
-                       for (i = 0; i < TOMOYO_MAX_PATH_OPERATION; i++)
-                               if (perm & (1 << i))
-                                       count++;
-                       if (perm & (1 << TOMOYO_TYPE_READ_WRITE))
-                               count -= 2;
-                       break;
-               case TOMOYO_TYPE_PATH2_ACL:
-                       perm = container_of(ptr, struct tomoyo_path2_acl, head)
-                               ->perm;
-                       for (i = 0; i < TOMOYO_MAX_PATH2_OPERATION; i++)
-                               if (perm & (1 << i))
-                                       count++;
-                       break;
-               case TOMOYO_TYPE_PATH_NUMBER_ACL:
-                       perm = container_of(ptr, struct tomoyo_path_number_acl,
-                                           head)->perm;
-                       for (i = 0; i < TOMOYO_MAX_PATH_NUMBER_OPERATION; i++)
-                               if (perm & (1 << i))
-                                       count++;
-                       break;
-               case TOMOYO_TYPE_PATH_NUMBER3_ACL:
-                       perm = container_of(ptr, struct tomoyo_path_number3_acl,
-                                           head)->perm;
-                       for (i = 0; i < TOMOYO_MAX_PATH_NUMBER3_OPERATION; i++)
-                               if (perm & (1 << i))
-                                       count++;
-                       break;
-               case TOMOYO_TYPE_MOUNT_ACL:
-                       if (!container_of(ptr, struct tomoyo_mount_acl, head)->
-                           is_deleted)
-                               count++;
-               }
-       }
-       if (count < tomoyo_check_flags(domain, TOMOYO_MAX_ACCEPT_ENTRY))
-               return true;
-       if (!domain->quota_warned) {
-               domain->quota_warned = true;
-               printk(KERN_WARNING "TOMOYO-WARNING: "
-                      "Domain '%s' has so many ACLs to hold. "
-                      "Stopped learning mode.\n", domain->domainname->name);
-       }
-       return false;
-}
-
 /**
  * tomoyo_find_or_assign_new_profile - Create a new profile.
  *
@@ -2118,91 +1215,6 @@ static int tomoyo_read_exception_policy(struct tomoyo_io_buffer *head)
        return 0;
 }
 
-/* path to policy loader */
-static const char *tomoyo_loader = "/sbin/tomoyo-init";
-
-/**
- * tomoyo_policy_loader_exists - Check whether /sbin/tomoyo-init exists.
- *
- * Returns true if /sbin/tomoyo-init exists, false otherwise.
- */
-static bool tomoyo_policy_loader_exists(void)
-{
-       /*
-        * Don't activate MAC if the policy loader doesn't exist.
-        * If the initrd includes /sbin/init but real-root-dev has not
-        * mounted on / yet, activating MAC will block the system since
-        * policies are not loaded yet.
-        * Thus, let do_execve() call this function everytime.
-        */
-       struct path path;
-
-       if (kern_path(tomoyo_loader, LOOKUP_FOLLOW, &path)) {
-               printk(KERN_INFO "Not activating Mandatory Access Control now "
-                      "since %s doesn't exist.\n", tomoyo_loader);
-               return false;
-       }
-       path_put(&path);
-       return true;
-}
-
-/**
- * tomoyo_load_policy - Run external policy loader to load policy.
- *
- * @filename: The program about to start.
- *
- * This function checks whether @filename is /sbin/init , and if so
- * invoke /sbin/tomoyo-init and wait for the termination of /sbin/tomoyo-init
- * and then continues invocation of /sbin/init.
- * /sbin/tomoyo-init reads policy files in /etc/tomoyo/ directory and
- * writes to /sys/kernel/security/tomoyo/ interfaces.
- *
- * Returns nothing.
- */
-void tomoyo_load_policy(const char *filename)
-{
-       char *argv[2];
-       char *envp[3];
-
-       if (tomoyo_policy_loaded)
-               return;
-       /*
-        * Check filename is /sbin/init or /sbin/tomoyo-start.
-        * /sbin/tomoyo-start is a dummy filename in case where /sbin/init can't
-        * be passed.
-        * You can create /sbin/tomoyo-start by
-        * "ln -s /bin/true /sbin/tomoyo-start".
-        */
-       if (strcmp(filename, "/sbin/init") &&
-           strcmp(filename, "/sbin/tomoyo-start"))
-               return;
-       if (!tomoyo_policy_loader_exists())
-               return;
-
-       printk(KERN_INFO "Calling %s to load policy. Please wait.\n",
-              tomoyo_loader);
-       argv[0] = (char *) tomoyo_loader;
-       argv[1] = NULL;
-       envp[0] = "HOME=/";
-       envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
-       envp[2] = NULL;
-       call_usermodehelper(argv[0], argv, envp, 1);
-
-       printk(KERN_INFO "TOMOYO: 2.2.0   2009/04/01\n");
-       printk(KERN_INFO "Mandatory Access Control activated.\n");
-       tomoyo_policy_loaded = true;
-       { /* Check all profiles currently assigned to domains are defined. */
-               struct tomoyo_domain_info *domain;
-               list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
-                       const u8 profile = domain->profile;
-                       if (tomoyo_profile_ptr[profile])
-                               continue;
-                       panic("Profile %u (used by '%s') not defined.\n",
-                             profile, domain->domainname->name);
-               }
-       }
-}
-
 /**
  * tomoyo_print_header - Get header line of audit log.
  *
@@ -2601,7 +1613,7 @@ static int tomoyo_read_self_domain(struct tomoyo_io_buffer *head)
  *
  * Caller acquires tomoyo_read_lock().
  */
-static int tomoyo_open_control(const u8 type, struct file *file)
+int tomoyo_open_control(const u8 type, struct file *file)
 {
        struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_NOFS);
 
@@ -2744,8 +1756,8 @@ int tomoyo_poll_control(struct file *file, poll_table *wait)
  *
  * Caller holds tomoyo_read_lock().
  */
-static int tomoyo_read_control(struct file *file, char __user *buffer,
-                              const int buffer_len)
+int tomoyo_read_control(struct file *file, char __user *buffer,
+                       const int buffer_len)
 {
        int len = 0;
        struct tomoyo_io_buffer *head = file->private_data;
@@ -2789,8 +1801,8 @@ static int tomoyo_read_control(struct file *file, char __user *buffer,
  *
  * Caller holds tomoyo_read_lock().
  */
-static int tomoyo_write_control(struct file *file, const char __user *buffer,
-                               const int buffer_len)
+int tomoyo_write_control(struct file *file, const char __user *buffer,
+                        const int buffer_len)
 {
        struct tomoyo_io_buffer *head = file->private_data;
        int error = buffer_len;
@@ -2841,7 +1853,7 @@ static int tomoyo_write_control(struct file *file, const char __user *buffer,
  *
  * Caller looses tomoyo_read_lock().
  */
-static int tomoyo_close_control(struct file *file)
+int tomoyo_close_control(struct file *file)
 {
        struct tomoyo_io_buffer *head = file->private_data;
        const bool is_write = !!head->write_buf;
@@ -2868,131 +1880,22 @@ static int tomoyo_close_control(struct file *file)
 }
 
 /**
- * tomoyo_open - open() for /sys/kernel/security/tomoyo/ interface.
- *
- * @inode: Pointer to "struct inode".
- * @file:  Pointer to "struct file".
- *
- * Returns 0 on success, negative value otherwise.
+ * tomoyo_check_profile - Check all profiles currently assigned to domains are defined.
  */
-static int tomoyo_open(struct inode *inode, struct file *file)
+void tomoyo_check_profile(void)
 {
-       const int key = ((u8 *) file->f_path.dentry->d_inode->i_private)
-               - ((u8 *) NULL);
-       return tomoyo_open_control(key, file);
-}
-
-/**
- * tomoyo_release - close() for /sys/kernel/security/tomoyo/ interface.
- *
- * @inode: Pointer to "struct inode".
- * @file:  Pointer to "struct file".
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_release(struct inode *inode, struct file *file)
-{
-       return tomoyo_close_control(file);
-}
-
-/**
- * tomoyo_read - read() for /sys/kernel/security/tomoyo/ interface.
- *
- * @file:  Pointer to "struct file".
- * @buf:   Pointer to buffer.
- * @count: Size of @buf.
- * @ppos:  Unused.
- *
- * Returns bytes read on success, negative value otherwise.
- */
-static ssize_t tomoyo_read(struct file *file, char __user *buf, size_t count,
-                          loff_t *ppos)
-{
-       return tomoyo_read_control(file, buf, count);
-}
-
-/**
- * tomoyo_write - write() for /sys/kernel/security/tomoyo/ interface.
- *
- * @file:  Pointer to "struct file".
- * @buf:   Pointer to buffer.
- * @count: Size of @buf.
- * @ppos:  Unused.
- *
- * Returns @count on success, negative value otherwise.
- */
-static ssize_t tomoyo_write(struct file *file, const char __user *buf,
-                           size_t count, loff_t *ppos)
-{
-       return tomoyo_write_control(file, buf, count);
-}
-
-/*
- * tomoyo_operations is a "struct file_operations" which is used for handling
- * /sys/kernel/security/tomoyo/ interface.
- *
- * Some files under /sys/kernel/security/tomoyo/ directory accept open(O_RDWR).
- * See tomoyo_io_buffer for internals.
- */
-static const struct file_operations tomoyo_operations = {
-       .open    = tomoyo_open,
-       .release = tomoyo_release,
-       .read    = tomoyo_read,
-       .write   = tomoyo_write,
-};
-
-/**
- * tomoyo_create_entry - Create interface files under /sys/kernel/security/tomoyo/ directory.
- *
- * @name:   The name of the interface file.
- * @mode:   The permission of the interface file.
- * @parent: The parent directory.
- * @key:    Type of interface.
- *
- * Returns nothing.
- */
-static void __init tomoyo_create_entry(const char *name, const mode_t mode,
-                                      struct dentry *parent, const u8 key)
-{
-       securityfs_create_file(name, mode, parent, ((u8 *) NULL) + key,
-                              &tomoyo_operations);
-}
-
-/**
- * tomoyo_initerface_init - Initialize /sys/kernel/security/tomoyo/ interface.
- *
- * Returns 0.
- */
-static int __init tomoyo_initerface_init(void)
-{
-       struct dentry *tomoyo_dir;
-
-       /* Don't create securityfs entries unless registered. */
-       if (current_cred()->security != &tomoyo_kernel_domain)
-               return 0;
-
-       tomoyo_dir = securityfs_create_dir("tomoyo", NULL);
-       tomoyo_create_entry("query",            0600, tomoyo_dir,
-                           TOMOYO_QUERY);
-       tomoyo_create_entry("domain_policy",    0600, tomoyo_dir,
-                           TOMOYO_DOMAINPOLICY);
-       tomoyo_create_entry("exception_policy", 0600, tomoyo_dir,
-                           TOMOYO_EXCEPTIONPOLICY);
-       tomoyo_create_entry("self_domain",      0400, tomoyo_dir,
-                           TOMOYO_SELFDOMAIN);
-       tomoyo_create_entry(".domain_status",   0600, tomoyo_dir,
-                           TOMOYO_DOMAIN_STATUS);
-       tomoyo_create_entry(".process_status",  0600, tomoyo_dir,
-                           TOMOYO_PROCESS_STATUS);
-       tomoyo_create_entry("meminfo",          0600, tomoyo_dir,
-                           TOMOYO_MEMINFO);
-       tomoyo_create_entry("profile",          0600, tomoyo_dir,
-                           TOMOYO_PROFILE);
-       tomoyo_create_entry("manager",          0600, tomoyo_dir,
-                           TOMOYO_MANAGER);
-       tomoyo_create_entry("version",          0400, tomoyo_dir,
-                           TOMOYO_VERSION);
-       return 0;
+       struct tomoyo_domain_info *domain;
+       const int idx = tomoyo_read_lock();
+       tomoyo_policy_loaded = true;
+       /* Check all profiles currently assigned to domains are defined. */
+       list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
+               const u8 profile = domain->profile;
+               if (tomoyo_profile_ptr[profile])
+                       continue;
+               panic("Profile %u (used by '%s') not defined.\n",
+                     profile, domain->domainname->name);
+       }
+       tomoyo_read_unlock(idx);
+       printk(KERN_INFO "TOMOYO: 2.2.0   2009/04/01\n");
+       printk(KERN_INFO "Mandatory Access Control activated.\n");
 }
-
-fs_initcall(tomoyo_initerface_init);
index dc5f98f52f61c11098007aa49b279e2551fdc20a..be03e4a21db0d9586bb0d07a508a0c5e13688751 100644 (file)
@@ -673,6 +673,31 @@ struct tomoyo_policy_manager_entry {
 extern asmlinkage long sys_getpid(void);
 extern asmlinkage long sys_getppid(void);
 
+/* Check whether the given string starts with the given keyword. */
+bool tomoyo_str_starts(char **src, const char *find);
+/* Get tomoyo_realpath() of current process. */
+const char *tomoyo_get_exe(void);
+/* Format string. */
+void tomoyo_normalize_line(unsigned char *buffer);
+/* Print warning or error message on console. */
+void tomoyo_warn_log(struct tomoyo_request_info *r, const char *fmt, ...)
+     __attribute__ ((format(printf, 2, 3)));
+/* Check all profiles currently assigned to domains are defined. */
+void tomoyo_check_profile(void);
+/* Open operation for /sys/kernel/security/tomoyo/ interface. */
+int tomoyo_open_control(const u8 type, struct file *file);
+/* Close /sys/kernel/security/tomoyo/ interface. */
+int tomoyo_close_control(struct file *file);
+/* Read operation for /sys/kernel/security/tomoyo/ interface. */
+int tomoyo_read_control(struct file *file, char __user *buffer,
+                       const int buffer_len);
+/* Write operation for /sys/kernel/security/tomoyo/ interface. */
+int tomoyo_write_control(struct file *file, const char __user *buffer,
+                        const int buffer_len);
+/* Check whether the domain has too many ACL entries to hold. */
+bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
+/* Print out of memory warning message. */
+void tomoyo_warn_oom(const char *function);
 /* Check whether the given name matches the given name_union. */
 bool tomoyo_compare_name_union(const struct tomoyo_path_info *name,
                               const struct tomoyo_name_union *ptr);
@@ -837,8 +862,8 @@ int tomoyo_read_memory_counter(struct tomoyo_io_buffer *head);
 /* Set memory quota. */
 int tomoyo_write_memory_quota(struct tomoyo_io_buffer *head);
 
-/* Initialize realpath related code. */
-void __init tomoyo_realpath_init(void);
+/* Initialize mm related code. */
+void __init tomoyo_mm_init(void);
 int tomoyo_check_exec_perm(struct tomoyo_domain_info *domain,
                           const struct tomoyo_path_info *filename);
 int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
index 7e242d27da5a5231a62d269778ea43721ca5e2d0..08428bc082df1fe33591e1b719c7645073695fd2 100644 (file)
@@ -1,12 +1,9 @@
 /*
  * security/tomoyo/domain.c
  *
- * Implementation of the Domain-Based Mandatory Access Control.
- *
- * Copyright (C) 2005-2009  NTT DATA CORPORATION
- *
- * Version: 2.2.0   2009/04/01
+ * Domain transition functions for TOMOYO.
  *
+ * Copyright (C) 2005-2010  NTT DATA CORPORATION
  */
 
 #include "common.h"
@@ -697,24 +694,11 @@ int tomoyo_find_next_domain(struct linux_binprm *bprm)
        struct tomoyo_path_info rn; /* real name */
        struct tomoyo_path_info sn; /* symlink name */
        struct tomoyo_path_info ln; /* last name */
-       static bool initialized;
 
        tomoyo_init_request_info(&r, NULL);
        if (!tmp)
                goto out;
 
-       if (!initialized) {
-               /*
-                * Built-in initializers. This is needed because policies are
-                * not loaded until starting /sbin/init.
-                */
-               tomoyo_update_domain_initializer_entry(NULL, "/sbin/hotplug",
-                                                      false, false);
-               tomoyo_update_domain_initializer_entry(NULL, "/sbin/modprobe",
-                                                      false, false);
-               initialized = true;
-       }
-
  retry:
        /* Get tomoyo_realpath of program. */
        retval = -ENOENT;
index c629cb4e2c66813f2ff149bacaf536c877a53120..c13806937dc66978fd8af5cc1275f18d7e9283b4 100644 (file)
@@ -1,12 +1,9 @@
 /*
  * security/tomoyo/file.c
  *
- * Implementation of the Domain-Based Mandatory Access Control.
- *
- * Copyright (C) 2005-2009  NTT DATA CORPORATION
- *
- * Version: 2.2.0   2009/04/01
+ * Pathname restriction functions.
  *
+ * Copyright (C) 2005-2010  NTT DATA CORPORATION
  */
 
 #include "common.h"
@@ -99,61 +96,6 @@ bool tomoyo_compare_number_union(const unsigned long value,
        return value >= ptr->values[0] && value <= ptr->values[1];
 }
 
-/**
- * tomoyo_init_request_info - Initialize "struct tomoyo_request_info" members.
- *
- * @r:      Pointer to "struct tomoyo_request_info" to initialize.
- * @domain: Pointer to "struct tomoyo_domain_info". NULL for tomoyo_domain().
- *
- * Returns mode.
- */
-int tomoyo_init_request_info(struct tomoyo_request_info *r,
-                            struct tomoyo_domain_info *domain)
-{
-       memset(r, 0, sizeof(*r));
-       if (!domain)
-               domain = tomoyo_domain();
-       r->domain = domain;
-       r->mode = tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE);
-       return r->mode;
-}
-
-static void tomoyo_warn_log(struct tomoyo_request_info *r, const char *fmt, ...)
-     __attribute__ ((format(printf, 2, 3)));
-/**
- * tomoyo_warn_log - Print warning or error message on console.
- *
- * @r:   Pointer to "struct tomoyo_request_info".
- * @fmt: The printf()'s format string, followed by parameters.
- */
-static void tomoyo_warn_log(struct tomoyo_request_info *r, const char *fmt, ...)
-{
-       int len = PAGE_SIZE;
-       va_list args;
-       char *buffer;
-       if (!tomoyo_verbose_mode(r->domain))
-               return;
-       while (1) {
-               int len2;
-               buffer = kmalloc(len, GFP_NOFS);
-               if (!buffer)
-                       return;
-               va_start(args, fmt);
-               len2 = vsnprintf(buffer, len - 1, fmt, args);
-               va_end(args);
-               if (len2 <= len - 1) {
-                       buffer[len2] = '\0';
-                       break;
-               }
-               len = len2 + 1;
-               kfree(buffer);
-       }
-       printk(KERN_WARNING "TOMOYO-%s: Access %s denied for %s\n",
-              r->mode == TOMOYO_CONFIG_ENFORCING ? "ERROR" : "WARNING",
-              buffer, tomoyo_get_last_name(r->domain));
-       kfree(buffer);
-}
-
 /**
  * tomoyo_path2keyword - Get the name of single path operation.
  *
diff --git a/security/tomoyo/load_policy.c b/security/tomoyo/load_policy.c
new file mode 100644 (file)
index 0000000..bbada7c
--- /dev/null
@@ -0,0 +1,81 @@
+/*
+ * security/tomoyo/load_policy.c
+ *
+ * Policy loader launcher for TOMOYO.
+ *
+ * Copyright (C) 2005-2010  NTT DATA CORPORATION
+ */
+
+#include "common.h"
+
+/* path to policy loader */
+static const char *tomoyo_loader = "/sbin/tomoyo-init";
+
+/**
+ * tomoyo_policy_loader_exists - Check whether /sbin/tomoyo-init exists.
+ *
+ * Returns true if /sbin/tomoyo-init exists, false otherwise.
+ */
+static bool tomoyo_policy_loader_exists(void)
+{
+       /*
+        * Don't activate MAC if the policy loader doesn't exist.
+        * If the initrd includes /sbin/init but real-root-dev has not
+        * mounted on / yet, activating MAC will block the system since
+        * policies are not loaded yet.
+        * Thus, let do_execve() call this function everytime.
+        */
+       struct path path;
+
+       if (kern_path(tomoyo_loader, LOOKUP_FOLLOW, &path)) {
+               printk(KERN_INFO "Not activating Mandatory Access Control now "
+                      "since %s doesn't exist.\n", tomoyo_loader);
+               return false;
+       }
+       path_put(&path);
+       return true;
+}
+
+/**
+ * tomoyo_load_policy - Run external policy loader to load policy.
+ *
+ * @filename: The program about to start.
+ *
+ * This function checks whether @filename is /sbin/init , and if so
+ * invoke /sbin/tomoyo-init and wait for the termination of /sbin/tomoyo-init
+ * and then continues invocation of /sbin/init.
+ * /sbin/tomoyo-init reads policy files in /etc/tomoyo/ directory and
+ * writes to /sys/kernel/security/tomoyo/ interfaces.
+ *
+ * Returns nothing.
+ */
+void tomoyo_load_policy(const char *filename)
+{
+       char *argv[2];
+       char *envp[3];
+
+       if (tomoyo_policy_loaded)
+               return;
+       /*
+        * Check filename is /sbin/init or /sbin/tomoyo-start.
+        * /sbin/tomoyo-start is a dummy filename in case where /sbin/init can't
+        * be passed.
+        * You can create /sbin/tomoyo-start by
+        * "ln -s /bin/true /sbin/tomoyo-start".
+        */
+       if (strcmp(filename, "/sbin/init") &&
+           strcmp(filename, "/sbin/tomoyo-start"))
+               return;
+       if (!tomoyo_policy_loader_exists())
+               return;
+
+       printk(KERN_INFO "Calling %s to load policy. Please wait.\n",
+              tomoyo_loader);
+       argv[0] = (char *) tomoyo_loader;
+       argv[1] = NULL;
+       envp[0] = "HOME=/";
+       envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
+       envp[2] = NULL;
+       call_usermodehelper(argv[0], argv, envp, 1);
+       tomoyo_check_profile();
+}
diff --git a/security/tomoyo/memory.c b/security/tomoyo/memory.c
new file mode 100644 (file)
index 0000000..8fb73ff
--- /dev/null
@@ -0,0 +1,236 @@
+/*
+ * security/tomoyo/memory.c
+ *
+ * Memory management functions for TOMOYO.
+ *
+ * Copyright (C) 2005-2010  NTT DATA CORPORATION
+ */
+
+#include <linux/hash.h>
+#include <linux/slab.h>
+#include "common.h"
+
+/**
+ * tomoyo_warn_oom - Print out of memory warning message.
+ *
+ * @function: Function's name.
+ */
+void tomoyo_warn_oom(const char *function)
+{
+       /* Reduce error messages. */
+       static pid_t tomoyo_last_pid;
+       const pid_t pid = current->pid;
+       if (tomoyo_last_pid != pid) {
+               printk(KERN_WARNING "ERROR: Out of memory at %s.\n",
+                      function);
+               tomoyo_last_pid = pid;
+       }
+       if (!tomoyo_policy_loaded)
+               panic("MAC Initialization failed.\n");
+}
+
+/* Memory allocated for policy. */
+static atomic_t tomoyo_policy_memory_size;
+/* Quota for holding policy. */
+static unsigned int tomoyo_quota_for_policy;
+
+/**
+ * tomoyo_memory_ok - Check memory quota.
+ *
+ * @ptr: Pointer to allocated memory.
+ *
+ * Returns true on success, false otherwise.
+ *
+ * Returns true if @ptr is not NULL and quota not exceeded, false otherwise.
+ */
+bool tomoyo_memory_ok(void *ptr)
+{
+       size_t s = ptr ? ksize(ptr) : 0;
+       atomic_add(s, &tomoyo_policy_memory_size);
+       if (ptr && (!tomoyo_quota_for_policy ||
+                   atomic_read(&tomoyo_policy_memory_size)
+                   <= tomoyo_quota_for_policy)) {
+               memset(ptr, 0, s);
+               return true;
+       }
+       atomic_sub(s, &tomoyo_policy_memory_size);
+       tomoyo_warn_oom(__func__);
+       return false;
+}
+
+/**
+ * tomoyo_commit_ok - Check memory quota.
+ *
+ * @data:   Data to copy from.
+ * @size:   Size in byte.
+ *
+ * Returns pointer to allocated memory on success, NULL otherwise.
+ * @data is zero-cleared on success.
+ */
+void *tomoyo_commit_ok(void *data, const unsigned int size)
+{
+       void *ptr = kzalloc(size, GFP_NOFS);
+       if (tomoyo_memory_ok(ptr)) {
+               memmove(ptr, data, size);
+               memset(data, 0, size);
+               return ptr;
+       }
+       return NULL;
+}
+
+/**
+ * tomoyo_memory_free - Free memory for elements.
+ *
+ * @ptr:  Pointer to allocated memory.
+ */
+void tomoyo_memory_free(void *ptr)
+{
+       atomic_sub(ksize(ptr), &tomoyo_policy_memory_size);
+       kfree(ptr);
+}
+
+/*
+ * tomoyo_name_list is used for holding string data used by TOMOYO.
+ * Since same string data is likely used for multiple times (e.g.
+ * "/lib/libc-2.5.so"), TOMOYO shares string data in the form of
+ * "const struct tomoyo_path_info *".
+ */
+struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
+
+/**
+ * tomoyo_get_name - Allocate permanent memory for string data.
+ *
+ * @name: The string to store into the permernent memory.
+ *
+ * Returns pointer to "struct tomoyo_path_info" on success, NULL otherwise.
+ */
+const struct tomoyo_path_info *tomoyo_get_name(const char *name)
+{
+       struct tomoyo_name_entry *ptr;
+       unsigned int hash;
+       int len;
+       int allocated_len;
+       struct list_head *head;
+
+       if (!name)
+               return NULL;
+       len = strlen(name) + 1;
+       hash = full_name_hash((const unsigned char *) name, len - 1);
+       head = &tomoyo_name_list[hash_long(hash, TOMOYO_HASH_BITS)];
+       if (mutex_lock_interruptible(&tomoyo_policy_lock))
+               return NULL;
+       list_for_each_entry(ptr, head, list) {
+               if (hash != ptr->entry.hash || strcmp(name, ptr->entry.name))
+                       continue;
+               atomic_inc(&ptr->users);
+               goto out;
+       }
+       ptr = kzalloc(sizeof(*ptr) + len, GFP_NOFS);
+       allocated_len = ptr ? ksize(ptr) : 0;
+       if (!ptr || (tomoyo_quota_for_policy &&
+                    atomic_read(&tomoyo_policy_memory_size) + allocated_len
+                    > tomoyo_quota_for_policy)) {
+               kfree(ptr);
+               ptr = NULL;
+               tomoyo_warn_oom(__func__);
+               goto out;
+       }
+       atomic_add(allocated_len, &tomoyo_policy_memory_size);
+       ptr->entry.name = ((char *) ptr) + sizeof(*ptr);
+       memmove((char *) ptr->entry.name, name, len);
+       atomic_set(&ptr->users, 1);
+       tomoyo_fill_path_info(&ptr->entry);
+       list_add_tail(&ptr->list, head);
+ out:
+       mutex_unlock(&tomoyo_policy_lock);
+       return ptr ? &ptr->entry : NULL;
+}
+
+/**
+ * tomoyo_mm_init - Initialize mm related code.
+ */
+void __init tomoyo_mm_init(void)
+{
+       int idx;
+
+       BUILD_BUG_ON(TOMOYO_MAX_PATHNAME_LEN > PATH_MAX);
+       for (idx = 0; idx < TOMOYO_MAX_HASH; idx++)
+               INIT_LIST_HEAD(&tomoyo_name_list[idx]);
+       INIT_LIST_HEAD(&tomoyo_kernel_domain.acl_info_list);
+       tomoyo_kernel_domain.domainname = tomoyo_get_name(TOMOYO_ROOT_NAME);
+       list_add_tail_rcu(&tomoyo_kernel_domain.list, &tomoyo_domain_list);
+       idx = tomoyo_read_lock();
+       if (tomoyo_find_domain(TOMOYO_ROOT_NAME) != &tomoyo_kernel_domain)
+               panic("Can't register tomoyo_kernel_domain");
+       {
+               /* Load built-in policy. */
+               tomoyo_write_domain_initializer_policy("/sbin/hotplug",
+                                                      false, false);
+               tomoyo_write_domain_initializer_policy("/sbin/modprobe",
+                                                      false, false);
+       }
+       tomoyo_read_unlock(idx);
+}
+
+
+/* Memory allocated for query lists. */
+unsigned int tomoyo_query_memory_size;
+/* Quota for holding query lists. */
+unsigned int tomoyo_quota_for_query;
+
+/**
+ * tomoyo_read_memory_counter - Check for memory usage in bytes.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns memory usage.
+ */
+int tomoyo_read_memory_counter(struct tomoyo_io_buffer *head)
+{
+       if (!head->read_eof) {
+               const unsigned int policy
+                       = atomic_read(&tomoyo_policy_memory_size);
+               const unsigned int query = tomoyo_query_memory_size;
+               char buffer[64];
+
+               memset(buffer, 0, sizeof(buffer));
+               if (tomoyo_quota_for_policy)
+                       snprintf(buffer, sizeof(buffer) - 1,
+                                "   (Quota: %10u)",
+                                tomoyo_quota_for_policy);
+               else
+                       buffer[0] = '\0';
+               tomoyo_io_printf(head, "Policy:       %10u%s\n", policy,
+                                buffer);
+               if (tomoyo_quota_for_query)
+                       snprintf(buffer, sizeof(buffer) - 1,
+                                "   (Quota: %10u)",
+                                tomoyo_quota_for_query);
+               else
+                       buffer[0] = '\0';
+               tomoyo_io_printf(head, "Query lists:  %10u%s\n", query,
+                                buffer);
+               tomoyo_io_printf(head, "Total:        %10u\n", policy + query);
+               head->read_eof = true;
+       }
+       return 0;
+}
+
+/**
+ * tomoyo_write_memory_quota - Set memory quota.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0.
+ */
+int tomoyo_write_memory_quota(struct tomoyo_io_buffer *head)
+{
+       char *data = head->write_buf;
+       unsigned int size;
+
+       if (sscanf(data, "Policy: %u", &size) == 1)
+               tomoyo_quota_for_policy = size;
+       else if (sscanf(data, "Query lists: %u", &size) == 1)
+               tomoyo_quota_for_query = size;
+       return 0;
+}
index 3ceb1724c92d4b82df969de1a7baa1fdc7a839c1..1fd685a94ad1243c0c162df511cb5d61e010e789 100644 (file)
@@ -1,19 +1,15 @@
 /*
  * security/tomoyo/realpath.c
  *
- * Get the canonicalized absolute pathnames. The basis for TOMOYO.
- *
- * Copyright (C) 2005-2009  NTT DATA CORPORATION
- *
- * Version: 2.2.0   2009/04/01
+ * Pathname calculation functions for TOMOYO.
  *
+ * Copyright (C) 2005-2010  NTT DATA CORPORATION
  */
 
 #include <linux/types.h>
 #include <linux/mount.h>
 #include <linux/mnt_namespace.h>
 #include <linux/fs_struct.h>
-#include <linux/hash.h>
 #include <linux/magic.h>
 #include <linux/slab.h>
 #include "common.h"
@@ -123,7 +119,7 @@ int tomoyo_realpath_from_path2(struct path *path, char *newname,
                }
        }
        if (error)
-               printk(KERN_WARNING "tomoyo_realpath: Pathname too long.\n");
+               tomoyo_warn_oom(__func__);
        return error;
 }
 
@@ -141,6 +137,7 @@ char *tomoyo_realpath_from_path(struct path *path)
 {
        char *buf = kzalloc(sizeof(struct tomoyo_page_buffer), GFP_NOFS);
 
+       BUILD_BUG_ON(TOMOYO_MAX_PATHNAME_LEN > PATH_MAX);
        BUILD_BUG_ON(sizeof(struct tomoyo_page_buffer)
                     <= TOMOYO_MAX_PATHNAME_LEN - 1);
        if (!buf)
@@ -189,206 +186,3 @@ char *tomoyo_realpath_nofollow(const char *pathname)
        }
        return NULL;
 }
-
-/* Memory allocated for non-string data. */
-static atomic_t tomoyo_policy_memory_size;
-/* Quota for holding policy. */
-static unsigned int tomoyo_quota_for_policy;
-
-/**
- * tomoyo_memory_ok - Check memory quota.
- *
- * @ptr: Pointer to allocated memory.
- *
- * Returns true on success, false otherwise.
- *
- * Caller holds tomoyo_policy_lock.
- * Memory pointed by @ptr will be zeroed on success.
- */
-bool tomoyo_memory_ok(void *ptr)
-{
-       int allocated_len = ptr ? ksize(ptr) : 0;
-       atomic_add(allocated_len, &tomoyo_policy_memory_size);
-       if (ptr && (!tomoyo_quota_for_policy ||
-                   atomic_read(&tomoyo_policy_memory_size)
-                   <= tomoyo_quota_for_policy)) {
-               memset(ptr, 0, allocated_len);
-               return true;
-       }
-       printk(KERN_WARNING "ERROR: Out of memory "
-              "for tomoyo_alloc_element().\n");
-       if (!tomoyo_policy_loaded)
-               panic("MAC Initialization failed.\n");
-       return false;
-}
-
-/**
- * tomoyo_commit_ok - Check memory quota.
- *
- * @data:   Data to copy from.
- * @size:   Size in byte.
- *
- * Returns pointer to allocated memory on success, NULL otherwise.
- */
-void *tomoyo_commit_ok(void *data, const unsigned int size)
-{
-       void *ptr = kzalloc(size, GFP_NOFS);
-       if (tomoyo_memory_ok(ptr)) {
-               memmove(ptr, data, size);
-               memset(data, 0, size);
-               return ptr;
-       }
-       return NULL;
-}
-
-/**
- * tomoyo_memory_free - Free memory for elements.
- *
- * @ptr:  Pointer to allocated memory.
- */
-void tomoyo_memory_free(void *ptr)
-{
-       atomic_sub(ksize(ptr), &tomoyo_policy_memory_size);
-       kfree(ptr);
-}
-
-/*
- * tomoyo_name_list is used for holding string data used by TOMOYO.
- * Since same string data is likely used for multiple times (e.g.
- * "/lib/libc-2.5.so"), TOMOYO shares string data in the form of
- * "const struct tomoyo_path_info *".
- */
-struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
-
-/**
- * tomoyo_get_name - Allocate permanent memory for string data.
- *
- * @name: The string to store into the permernent memory.
- *
- * Returns pointer to "struct tomoyo_path_info" on success, NULL otherwise.
- */
-const struct tomoyo_path_info *tomoyo_get_name(const char *name)
-{
-       struct tomoyo_name_entry *ptr;
-       unsigned int hash;
-       int len;
-       int allocated_len;
-       struct list_head *head;
-
-       if (!name)
-               return NULL;
-       len = strlen(name) + 1;
-       hash = full_name_hash((const unsigned char *) name, len - 1);
-       head = &tomoyo_name_list[hash_long(hash, TOMOYO_HASH_BITS)];
-       if (mutex_lock_interruptible(&tomoyo_policy_lock))
-               return NULL;
-       list_for_each_entry(ptr, head, list) {
-               if (hash != ptr->entry.hash || strcmp(name, ptr->entry.name))
-                       continue;
-               atomic_inc(&ptr->users);
-               goto out;
-       }
-       ptr = kzalloc(sizeof(*ptr) + len, GFP_NOFS);
-       allocated_len = ptr ? ksize(ptr) : 0;
-       if (!ptr || (tomoyo_quota_for_policy &&
-                    atomic_read(&tomoyo_policy_memory_size) + allocated_len
-                    > tomoyo_quota_for_policy)) {
-               kfree(ptr);
-               printk(KERN_WARNING "ERROR: Out of memory "
-                      "for tomoyo_get_name().\n");
-               if (!tomoyo_policy_loaded)
-                       panic("MAC Initialization failed.\n");
-               ptr = NULL;
-               goto out;
-       }
-       atomic_add(allocated_len, &tomoyo_policy_memory_size);
-       ptr->entry.name = ((char *) ptr) + sizeof(*ptr);
-       memmove((char *) ptr->entry.name, name, len);
-       atomic_set(&ptr->users, 1);
-       tomoyo_fill_path_info(&ptr->entry);
-       list_add_tail(&ptr->list, head);
- out:
-       mutex_unlock(&tomoyo_policy_lock);
-       return ptr ? &ptr->entry : NULL;
-}
-
-/**
- * tomoyo_realpath_init - Initialize realpath related code.
- */
-void __init tomoyo_realpath_init(void)
-{
-       int i;
-
-       BUILD_BUG_ON(TOMOYO_MAX_PATHNAME_LEN > PATH_MAX);
-       for (i = 0; i < TOMOYO_MAX_HASH; i++)
-               INIT_LIST_HEAD(&tomoyo_name_list[i]);
-       INIT_LIST_HEAD(&tomoyo_kernel_domain.acl_info_list);
-       tomoyo_kernel_domain.domainname = tomoyo_get_name(TOMOYO_ROOT_NAME);
-       /*
-        * tomoyo_read_lock() is not needed because this function is
-        * called before the first "delete" request.
-        */
-       list_add_tail_rcu(&tomoyo_kernel_domain.list, &tomoyo_domain_list);
-       if (tomoyo_find_domain(TOMOYO_ROOT_NAME) != &tomoyo_kernel_domain)
-               panic("Can't register tomoyo_kernel_domain");
-}
-
-unsigned int tomoyo_quota_for_query;
-unsigned int tomoyo_query_memory_size;
-
-/**
- * tomoyo_read_memory_counter - Check for memory usage in bytes.
- *
- * @head: Pointer to "struct tomoyo_io_buffer".
- *
- * Returns memory usage.
- */
-int tomoyo_read_memory_counter(struct tomoyo_io_buffer *head)
-{
-       if (!head->read_eof) {
-               const unsigned int policy
-                       = atomic_read(&tomoyo_policy_memory_size);
-               const unsigned int query = tomoyo_query_memory_size;
-               char buffer[64];
-
-               memset(buffer, 0, sizeof(buffer));
-               if (tomoyo_quota_for_policy)
-                       snprintf(buffer, sizeof(buffer) - 1,
-                                "   (Quota: %10u)",
-                                tomoyo_quota_for_policy);
-               else
-                       buffer[0] = '\0';
-               tomoyo_io_printf(head, "Policy:       %10u%s\n", policy,
-                                buffer);
-               if (tomoyo_quota_for_query)
-                       snprintf(buffer, sizeof(buffer) - 1,
-                                "   (Quota: %10u)",
-                                tomoyo_quota_for_query);
-               else
-                       buffer[0] = '\0';
-               tomoyo_io_printf(head, "Query lists:  %10u%s\n", query,
-                                buffer);
-               tomoyo_io_printf(head, "Total:        %10u\n", policy + query);
-               head->read_eof = true;
-       }
-       return 0;
-}
-
-/**
- * tomoyo_write_memory_quota - Set memory quota.
- *
- * @head: Pointer to "struct tomoyo_io_buffer".
- *
- * Returns 0.
- */
-int tomoyo_write_memory_quota(struct tomoyo_io_buffer *head)
-{
-       char *data = head->write_buf;
-       unsigned int size;
-
-       if (sscanf(data, "Policy: %u", &size) == 1)
-               tomoyo_quota_for_policy = size;
-       else if (sscanf(data, "Query lists: %u", &size) == 1)
-               tomoyo_quota_for_query = size;
-       return 0;
-}
diff --git a/security/tomoyo/securityfs_if.c b/security/tomoyo/securityfs_if.c
new file mode 100644 (file)
index 0000000..5eb5351
--- /dev/null
@@ -0,0 +1,140 @@
+/*
+ * security/tomoyo/common.c
+ *
+ * Securityfs interface for TOMOYO.
+ *
+ * Copyright (C) 2005-2010  NTT DATA CORPORATION
+ */
+
+#include <linux/security.h>
+#include "common.h"
+
+/**
+ * tomoyo_open - open() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @inode: Pointer to "struct inode".
+ * @file:  Pointer to "struct file".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_open(struct inode *inode, struct file *file)
+{
+       const int key = ((u8 *) file->f_path.dentry->d_inode->i_private)
+               - ((u8 *) NULL);
+       return tomoyo_open_control(key, file);
+}
+
+/**
+ * tomoyo_release - close() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @inode: Pointer to "struct inode".
+ * @file:  Pointer to "struct file".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_release(struct inode *inode, struct file *file)
+{
+       return tomoyo_close_control(file);
+}
+
+/**
+ * tomoyo_read - read() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @file:  Pointer to "struct file".
+ * @buf:   Pointer to buffer.
+ * @count: Size of @buf.
+ * @ppos:  Unused.
+ *
+ * Returns bytes read on success, negative value otherwise.
+ */
+static ssize_t tomoyo_read(struct file *file, char __user *buf, size_t count,
+                          loff_t *ppos)
+{
+       return tomoyo_read_control(file, buf, count);
+}
+
+/**
+ * tomoyo_write - write() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @file:  Pointer to "struct file".
+ * @buf:   Pointer to buffer.
+ * @count: Size of @buf.
+ * @ppos:  Unused.
+ *
+ * Returns @count on success, negative value otherwise.
+ */
+static ssize_t tomoyo_write(struct file *file, const char __user *buf,
+                           size_t count, loff_t *ppos)
+{
+       return tomoyo_write_control(file, buf, count);
+}
+
+/*
+ * tomoyo_operations is a "struct file_operations" which is used for handling
+ * /sys/kernel/security/tomoyo/ interface.
+ *
+ * Some files under /sys/kernel/security/tomoyo/ directory accept open(O_RDWR).
+ * See tomoyo_io_buffer for internals.
+ */
+static const struct file_operations tomoyo_operations = {
+       .open    = tomoyo_open,
+       .release = tomoyo_release,
+       .read    = tomoyo_read,
+       .write   = tomoyo_write,
+};
+
+/**
+ * tomoyo_create_entry - Create interface files under /sys/kernel/security/tomoyo/ directory.
+ *
+ * @name:   The name of the interface file.
+ * @mode:   The permission of the interface file.
+ * @parent: The parent directory.
+ * @key:    Type of interface.
+ *
+ * Returns nothing.
+ */
+static void __init tomoyo_create_entry(const char *name, const mode_t mode,
+                                      struct dentry *parent, const u8 key)
+{
+       securityfs_create_file(name, mode, parent, ((u8 *) NULL) + key,
+                              &tomoyo_operations);
+}
+
+/**
+ * tomoyo_initerface_init - Initialize /sys/kernel/security/tomoyo/ interface.
+ *
+ * Returns 0.
+ */
+static int __init tomoyo_initerface_init(void)
+{
+       struct dentry *tomoyo_dir;
+
+       /* Don't create securityfs entries unless registered. */
+       if (current_cred()->security != &tomoyo_kernel_domain)
+               return 0;
+
+       tomoyo_dir = securityfs_create_dir("tomoyo", NULL);
+       tomoyo_create_entry("query",            0600, tomoyo_dir,
+                           TOMOYO_QUERY);
+       tomoyo_create_entry("domain_policy",    0600, tomoyo_dir,
+                           TOMOYO_DOMAINPOLICY);
+       tomoyo_create_entry("exception_policy", 0600, tomoyo_dir,
+                           TOMOYO_EXCEPTIONPOLICY);
+       tomoyo_create_entry("self_domain",      0400, tomoyo_dir,
+                           TOMOYO_SELFDOMAIN);
+       tomoyo_create_entry(".domain_status",   0600, tomoyo_dir,
+                           TOMOYO_DOMAIN_STATUS);
+       tomoyo_create_entry(".process_status",  0600, tomoyo_dir,
+                           TOMOYO_PROCESS_STATUS);
+       tomoyo_create_entry("meminfo",          0600, tomoyo_dir,
+                           TOMOYO_MEMINFO);
+       tomoyo_create_entry("profile",          0600, tomoyo_dir,
+                           TOMOYO_PROFILE);
+       tomoyo_create_entry("manager",          0600, tomoyo_dir,
+                           TOMOYO_MANAGER);
+       tomoyo_create_entry("version",          0400, tomoyo_dir,
+                           TOMOYO_VERSION);
+       return 0;
+}
+
+fs_initcall(tomoyo_initerface_init);
index 5d64d409b1129df134f9983b24f8d4307319c47b..57d442e7339b2772eb7543aafa31448cf36a012f 100644 (file)
@@ -3,10 +3,7 @@
  *
  * LSM hooks for TOMOYO Linux.
  *
- * Copyright (C) 2005-2009  NTT DATA CORPORATION
- *
- * Version: 2.2.0   2009/04/01
- *
+ * Copyright (C) 2005-2010  NTT DATA CORPORATION
  */
 
 #include <linux/security.h>
@@ -286,7 +283,7 @@ static int __init tomoyo_init(void)
                panic("Failure registering TOMOYO Linux");
        printk(KERN_INFO "TOMOYO Linux initialized\n");
        cred->security = &tomoyo_kernel_domain;
-       tomoyo_realpath_init();
+       tomoyo_mm_init();
        return 0;
 }
 
diff --git a/security/tomoyo/util.c b/security/tomoyo/util.c
new file mode 100644 (file)
index 0000000..7b023f5
--- /dev/null
@@ -0,0 +1,951 @@
+/*
+ * security/tomoyo/util.c
+ *
+ * Utility functions for TOMOYO.
+ *
+ * Copyright (C) 2005-2010  NTT DATA CORPORATION
+ */
+
+#include <linux/slab.h>
+#include "common.h"
+
+/* Lock for protecting policy. */
+DEFINE_MUTEX(tomoyo_policy_lock);
+
+/* Has /sbin/init started? */
+bool tomoyo_policy_loaded;
+
+/**
+ * tomoyo_parse_ulong - Parse an "unsigned long" value.
+ *
+ * @result: Pointer to "unsigned long".
+ * @str:    Pointer to string to parse.
+ *
+ * Returns value type on success, 0 otherwise.
+ *
+ * The @src is updated to point the first character after the value
+ * on success.
+ */
+u8 tomoyo_parse_ulong(unsigned long *result, char **str)
+{
+       const char *cp = *str;
+       char *ep;
+       int base = 10;
+       if (*cp == '0') {
+               char c = *(cp + 1);
+               if (c == 'x' || c == 'X') {
+                       base = 16;
+                       cp += 2;
+               } else if (c >= '0' && c <= '7') {
+                       base = 8;
+                       cp++;
+               }
+       }
+       *result = simple_strtoul(cp, &ep, base);
+       if (cp == ep)
+               return 0;
+       *str = ep;
+       switch (base) {
+       case 16:
+               return TOMOYO_VALUE_TYPE_HEXADECIMAL;
+       case 8:
+               return TOMOYO_VALUE_TYPE_OCTAL;
+       default:
+               return TOMOYO_VALUE_TYPE_DECIMAL;
+       }
+}
+
+/**
+ * tomoyo_print_ulong - Print an "unsigned long" value.
+ *
+ * @buffer:     Pointer to buffer.
+ * @buffer_len: Size of @buffer.
+ * @value:      An "unsigned long" value.
+ * @type:       Type of @value.
+ *
+ * Returns nothing.
+ */
+void tomoyo_print_ulong(char *buffer, const int buffer_len,
+                       const unsigned long value, const u8 type)
+{
+       if (type == TOMOYO_VALUE_TYPE_DECIMAL)
+               snprintf(buffer, buffer_len, "%lu", value);
+       else if (type == TOMOYO_VALUE_TYPE_OCTAL)
+               snprintf(buffer, buffer_len, "0%lo", value);
+       else if (type == TOMOYO_VALUE_TYPE_HEXADECIMAL)
+               snprintf(buffer, buffer_len, "0x%lX", value);
+       else
+               snprintf(buffer, buffer_len, "type(%u)", type);
+}
+
+/**
+ * tomoyo_parse_name_union - Parse a tomoyo_name_union.
+ *
+ * @filename: Name or name group.
+ * @ptr:      Pointer to "struct tomoyo_name_union".
+ *
+ * Returns true on success, false otherwise.
+ */
+bool tomoyo_parse_name_union(const char *filename,
+                            struct tomoyo_name_union *ptr)
+{
+       if (!tomoyo_is_correct_path(filename, 0, 0, 0))
+               return false;
+       if (filename[0] == '@') {
+               ptr->group = tomoyo_get_path_group(filename + 1);
+               ptr->is_group = true;
+               return ptr->group != NULL;
+       }
+       ptr->filename = tomoyo_get_name(filename);
+       ptr->is_group = false;
+       return ptr->filename != NULL;
+}
+
+/**
+ * tomoyo_parse_number_union - Parse a tomoyo_number_union.
+ *
+ * @data: Number or number range or number group.
+ * @ptr:  Pointer to "struct tomoyo_number_union".
+ *
+ * Returns true on success, false otherwise.
+ */
+bool tomoyo_parse_number_union(char *data, struct tomoyo_number_union *num)
+{
+       u8 type;
+       unsigned long v;
+       memset(num, 0, sizeof(*num));
+       if (data[0] == '@') {
+               if (!tomoyo_is_correct_path(data, 0, 0, 0))
+                       return false;
+               num->group = tomoyo_get_number_group(data + 1);
+               num->is_group = true;
+               return num->group != NULL;
+       }
+       type = tomoyo_parse_ulong(&v, &data);
+       if (!type)
+               return false;
+       num->values[0] = v;
+       num->min_type = type;
+       if (!*data) {
+               num->values[1] = v;
+               num->max_type = type;
+               return true;
+       }
+       if (*data++ != '-')
+               return false;
+       type = tomoyo_parse_ulong(&v, &data);
+       if (!type || *data)
+               return false;
+       num->values[1] = v;
+       num->max_type = type;
+       return true;
+}
+
+/**
+ * tomoyo_is_byte_range - Check whether the string is a \ooo style octal value.
+ *
+ * @str: Pointer to the string.
+ *
+ * Returns true if @str is a \ooo style octal value, false otherwise.
+ *
+ * TOMOYO uses \ooo style representation for 0x01 - 0x20 and 0x7F - 0xFF.
+ * This function verifies that \ooo is in valid range.
+ */
+static inline bool tomoyo_is_byte_range(const char *str)
+{
+       return *str >= '0' && *str++ <= '3' &&
+               *str >= '0' && *str++ <= '7' &&
+               *str >= '0' && *str <= '7';
+}
+
+/**
+ * tomoyo_is_alphabet_char - Check whether the character is an alphabet.
+ *
+ * @c: The character to check.
+ *
+ * Returns true if @c is an alphabet character, false otherwise.
+ */
+static inline bool tomoyo_is_alphabet_char(const char c)
+{
+       return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
+}
+
+/**
+ * tomoyo_make_byte - Make byte value from three octal characters.
+ *
+ * @c1: The first character.
+ * @c2: The second character.
+ * @c3: The third character.
+ *
+ * Returns byte value.
+ */
+static inline u8 tomoyo_make_byte(const u8 c1, const u8 c2, const u8 c3)
+{
+       return ((c1 - '0') << 6) + ((c2 - '0') << 3) + (c3 - '0');
+}
+
+/**
+ * tomoyo_str_starts - Check whether the given string starts with the given keyword.
+ *
+ * @src:  Pointer to pointer to the string.
+ * @find: Pointer to the keyword.
+ *
+ * Returns true if @src starts with @find, false otherwise.
+ *
+ * The @src is updated to point the first character after the @find
+ * if @src starts with @find.
+ */
+bool tomoyo_str_starts(char **src, const char *find)
+{
+       const int len = strlen(find);
+       char *tmp = *src;
+
+       if (strncmp(tmp, find, len))
+               return false;
+       tmp += len;
+       *src = tmp;
+       return true;
+}
+
+/**
+ * tomoyo_normalize_line - Format string.
+ *
+ * @buffer: The line to normalize.
+ *
+ * Leading and trailing whitespaces are removed.
+ * Multiple whitespaces are packed into single space.
+ *
+ * Returns nothing.
+ */
+void tomoyo_normalize_line(unsigned char *buffer)
+{
+       unsigned char *sp = buffer;
+       unsigned char *dp = buffer;
+       bool first = true;
+
+       while (tomoyo_is_invalid(*sp))
+               sp++;
+       while (*sp) {
+               if (!first)
+                       *dp++ = ' ';
+               first = false;
+               while (tomoyo_is_valid(*sp))
+                       *dp++ = *sp++;
+               while (tomoyo_is_invalid(*sp))
+                       sp++;
+       }
+       *dp = '\0';
+}
+
+/**
+ * tomoyo_tokenize - Tokenize string.
+ *
+ * @buffer: The line to tokenize.
+ * @w:      Pointer to "char *".
+ * @size:   Sizeof @w .
+ *
+ * Returns true on success, false otherwise.
+ */
+bool tomoyo_tokenize(char *buffer, char *w[], size_t size)
+{
+       int count = size / sizeof(char *);
+       int i;
+       for (i = 0; i < count; i++)
+               w[i] = "";
+       for (i = 0; i < count; i++) {
+               char *cp = strchr(buffer, ' ');
+               if (cp)
+                       *cp = '\0';
+               w[i] = buffer;
+               if (!cp)
+                       break;
+               buffer = cp + 1;
+       }
+       return i < count || !*buffer;
+}
+
+/**
+ * tomoyo_is_correct_path - Validate a pathname.
+ *
+ * @filename:     The pathname to check.
+ * @start_type:   Should the pathname start with '/'?
+ *                1 = must / -1 = must not / 0 = don't care
+ * @pattern_type: Can the pathname contain a wildcard?
+ *                1 = must / -1 = must not / 0 = don't care
+ * @end_type:     Should the pathname end with '/'?
+ *                1 = must / -1 = must not / 0 = don't care
+ *
+ * Check whether the given filename follows the naming rules.
+ * Returns true if @filename follows the naming rules, false otherwise.
+ */
+bool tomoyo_is_correct_path(const char *filename, const s8 start_type,
+                           const s8 pattern_type, const s8 end_type)
+{
+       const char *const start = filename;
+       bool in_repetition = false;
+       bool contains_pattern = false;
+       unsigned char c;
+       unsigned char d;
+       unsigned char e;
+
+       if (!filename)
+               goto out;
+       c = *filename;
+       if (start_type == 1) { /* Must start with '/' */
+               if (c != '/')
+                       goto out;
+       } else if (start_type == -1) { /* Must not start with '/' */
+               if (c == '/')
+                       goto out;
+       }
+       if (c)
+               c = *(filename + strlen(filename) - 1);
+       if (end_type == 1) { /* Must end with '/' */
+               if (c != '/')
+                       goto out;
+       } else if (end_type == -1) { /* Must not end with '/' */
+               if (c == '/')
+                       goto out;
+       }
+       while (1) {
+               c = *filename++;
+               if (!c)
+                       break;
+               if (c == '\\') {
+                       c = *filename++;
+                       switch (c) {
+                       case '\\':  /* "\\" */
+                               continue;
+                       case '$':   /* "\$" */
+                       case '+':   /* "\+" */
+                       case '?':   /* "\?" */
+                       case '*':   /* "\*" */
+                       case '@':   /* "\@" */
+                       case 'x':   /* "\x" */
+                       case 'X':   /* "\X" */
+                       case 'a':   /* "\a" */
+                       case 'A':   /* "\A" */
+                       case '-':   /* "\-" */
+                               if (pattern_type == -1)
+                                       break; /* Must not contain pattern */
+                               contains_pattern = true;
+                               continue;
+                       case '{':   /* "/\{" */
+                               if (filename - 3 < start ||
+                                   *(filename - 3) != '/')
+                                       break;
+                               if (pattern_type == -1)
+                                       break; /* Must not contain pattern */
+                               contains_pattern = true;
+                               in_repetition = true;
+                               continue;
+                       case '}':   /* "\}/" */
+                               if (*filename != '/')
+                                       break;
+                               if (!in_repetition)
+                                       break;
+                               in_repetition = false;
+                               continue;
+                       case '0':   /* "\ooo" */
+                       case '1':
+                       case '2':
+                       case '3':
+                               d = *filename++;
+                               if (d < '0' || d > '7')
+                                       break;
+                               e = *filename++;
+                               if (e < '0' || e > '7')
+                                       break;
+                               c = tomoyo_make_byte(c, d, e);
+                               if (tomoyo_is_invalid(c))
+                                       continue; /* pattern is not \000 */
+                       }
+                       goto out;
+               } else if (in_repetition && c == '/') {
+                       goto out;
+               } else if (tomoyo_is_invalid(c)) {
+                       goto out;
+               }
+       }
+       if (pattern_type == 1) { /* Must contain pattern */
+               if (!contains_pattern)
+                       goto out;
+       }
+       if (in_repetition)
+               goto out;
+       return true;
+ out:
+       return false;
+}
+
+/**
+ * tomoyo_is_correct_domain - Check whether the given domainname follows the naming rules.
+ *
+ * @domainname:   The domainname to check.
+ *
+ * Returns true if @domainname follows the naming rules, false otherwise.
+ */
+bool tomoyo_is_correct_domain(const unsigned char *domainname)
+{
+       unsigned char c;
+       unsigned char d;
+       unsigned char e;
+
+       if (!domainname || strncmp(domainname, TOMOYO_ROOT_NAME,
+                                  TOMOYO_ROOT_NAME_LEN))
+               goto out;
+       domainname += TOMOYO_ROOT_NAME_LEN;
+       if (!*domainname)
+               return true;
+       do {
+               if (*domainname++ != ' ')
+                       goto out;
+               if (*domainname++ != '/')
+                       goto out;
+               while ((c = *domainname) != '\0' && c != ' ') {
+                       domainname++;
+                       if (c == '\\') {
+                               c = *domainname++;
+                               switch ((c)) {
+                               case '\\':  /* "\\" */
+                                       continue;
+                               case '0':   /* "\ooo" */
+                               case '1':
+                               case '2':
+                               case '3':
+                                       d = *domainname++;
+                                       if (d < '0' || d > '7')
+                                               break;
+                                       e = *domainname++;
+                                       if (e < '0' || e > '7')
+                                               break;
+                                       c = tomoyo_make_byte(c, d, e);
+                                       if (tomoyo_is_invalid(c))
+                                               /* pattern is not \000 */
+                                               continue;
+                               }
+                               goto out;
+                       } else if (tomoyo_is_invalid(c)) {
+                               goto out;
+                       }
+               }
+       } while (*domainname);
+       return true;
+ out:
+       return false;
+}
+
+/**
+ * tomoyo_is_domain_def - Check whether the given token can be a domainname.
+ *
+ * @buffer: The token to check.
+ *
+ * Returns true if @buffer possibly be a domainname, false otherwise.
+ */
+bool tomoyo_is_domain_def(const unsigned char *buffer)
+{
+       return !strncmp(buffer, TOMOYO_ROOT_NAME, TOMOYO_ROOT_NAME_LEN);
+}
+
+/**
+ * tomoyo_find_domain - Find a domain by the given name.
+ *
+ * @domainname: The domainname to find.
+ *
+ * Returns pointer to "struct tomoyo_domain_info" if found, NULL otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname)
+{
+       struct tomoyo_domain_info *domain;
+       struct tomoyo_path_info name;
+
+       name.name = domainname;
+       tomoyo_fill_path_info(&name);
+       list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
+               if (!domain->is_deleted &&
+                   !tomoyo_pathcmp(&name, domain->domainname))
+                       return domain;
+       }
+       return NULL;
+}
+
+/**
+ * tomoyo_const_part_length - Evaluate the initial length without a pattern in a token.
+ *
+ * @filename: The string to evaluate.
+ *
+ * Returns the initial length without a pattern in @filename.
+ */
+static int tomoyo_const_part_length(const char *filename)
+{
+       char c;
+       int len = 0;
+
+       if (!filename)
+               return 0;
+       while ((c = *filename++) != '\0') {
+               if (c != '\\') {
+                       len++;
+                       continue;
+               }
+               c = *filename++;
+               switch (c) {
+               case '\\':  /* "\\" */
+                       len += 2;
+                       continue;
+               case '0':   /* "\ooo" */
+               case '1':
+               case '2':
+               case '3':
+                       c = *filename++;
+                       if (c < '0' || c > '7')
+                               break;
+                       c = *filename++;
+                       if (c < '0' || c > '7')
+                               break;
+                       len += 4;
+                       continue;
+               }
+               break;
+       }
+       return len;
+}
+
+/**
+ * tomoyo_fill_path_info - Fill in "struct tomoyo_path_info" members.
+ *
+ * @ptr: Pointer to "struct tomoyo_path_info" to fill in.
+ *
+ * The caller sets "struct tomoyo_path_info"->name.
+ */
+void tomoyo_fill_path_info(struct tomoyo_path_info *ptr)
+{
+       const char *name = ptr->name;
+       const int len = strlen(name);
+
+       ptr->const_len = tomoyo_const_part_length(name);
+       ptr->is_dir = len && (name[len - 1] == '/');
+       ptr->is_patterned = (ptr->const_len < len);
+       ptr->hash = full_name_hash(name, len);
+}
+
+/**
+ * tomoyo_file_matches_pattern2 - Pattern matching without '/' character and "\-" pattern.
+ *
+ * @filename:     The start of string to check.
+ * @filename_end: The end of string to check.
+ * @pattern:      The start of pattern to compare.
+ * @pattern_end:  The end of pattern to compare.
+ *
+ * Returns true if @filename matches @pattern, false otherwise.
+ */
+static bool tomoyo_file_matches_pattern2(const char *filename,
+                                        const char *filename_end,
+                                        const char *pattern,
+                                        const char *pattern_end)
+{
+       while (filename < filename_end && pattern < pattern_end) {
+               char c;
+               if (*pattern != '\\') {
+                       if (*filename++ != *pattern++)
+                               return false;
+                       continue;
+               }
+               c = *filename;
+               pattern++;
+               switch (*pattern) {
+                       int i;
+                       int j;
+               case '?':
+                       if (c == '/') {
+                               return false;
+                       } else if (c == '\\') {
+                               if (filename[1] == '\\')
+                                       filename++;
+                               else if (tomoyo_is_byte_range(filename + 1))
+                                       filename += 3;
+                               else
+                                       return false;
+                       }
+                       break;
+               case '\\':
+                       if (c != '\\')
+                               return false;
+                       if (*++filename != '\\')
+                               return false;
+                       break;
+               case '+':
+                       if (!isdigit(c))
+                               return false;
+                       break;
+               case 'x':
+                       if (!isxdigit(c))
+                               return false;
+                       break;
+               case 'a':
+                       if (!tomoyo_is_alphabet_char(c))
+                               return false;
+                       break;
+               case '0':
+               case '1':
+               case '2':
+               case '3':
+                       if (c == '\\' && tomoyo_is_byte_range(filename + 1)
+                           && strncmp(filename + 1, pattern, 3) == 0) {
+                               filename += 3;
+                               pattern += 2;
+                               break;
+                       }
+                       return false; /* Not matched. */
+               case '*':
+               case '@':
+                       for (i = 0; i <= filename_end - filename; i++) {
+                               if (tomoyo_file_matches_pattern2(
+                                                   filename + i, filename_end,
+                                                   pattern + 1, pattern_end))
+                                       return true;
+                               c = filename[i];
+                               if (c == '.' && *pattern == '@')
+                                       break;
+                               if (c != '\\')
+                                       continue;
+                               if (filename[i + 1] == '\\')
+                                       i++;
+                               else if (tomoyo_is_byte_range(filename + i + 1))
+                                       i += 3;
+                               else
+                                       break; /* Bad pattern. */
+                       }
+                       return false; /* Not matched. */
+               default:
+                       j = 0;
+                       c = *pattern;
+                       if (c == '$') {
+                               while (isdigit(filename[j]))
+                                       j++;
+                       } else if (c == 'X') {
+                               while (isxdigit(filename[j]))
+                                       j++;
+                       } else if (c == 'A') {
+                               while (tomoyo_is_alphabet_char(filename[j]))
+                                       j++;
+                       }
+                       for (i = 1; i <= j; i++) {
+                               if (tomoyo_file_matches_pattern2(
+                                                   filename + i, filename_end,
+                                                   pattern + 1, pattern_end))
+                                       return true;
+                       }
+                       return false; /* Not matched or bad pattern. */
+               }
+               filename++;
+               pattern++;
+       }
+       while (*pattern == '\\' &&
+              (*(pattern + 1) == '*' || *(pattern + 1) == '@'))
+               pattern += 2;
+       return filename == filename_end && pattern == pattern_end;
+}
+
+/**
+ * tomoyo_file_matches_pattern - Pattern matching without '/' character.
+ *
+ * @filename:     The start of string to check.
+ * @filename_end: The end of string to check.
+ * @pattern:      The start of pattern to compare.
+ * @pattern_end:  The end of pattern to compare.
+ *
+ * Returns true if @filename matches @pattern, false otherwise.
+ */
+static bool tomoyo_file_matches_pattern(const char *filename,
+                                       const char *filename_end,
+                                       const char *pattern,
+                                       const char *pattern_end)
+{
+       const char *pattern_start = pattern;
+       bool first = true;
+       bool result;
+
+       while (pattern < pattern_end - 1) {
+               /* Split at "\-" pattern. */
+               if (*pattern++ != '\\' || *pattern++ != '-')
+                       continue;
+               result = tomoyo_file_matches_pattern2(filename,
+                                                     filename_end,
+                                                     pattern_start,
+                                                     pattern - 2);
+               if (first)
+                       result = !result;
+               if (result)
+                       return false;
+               first = false;
+               pattern_start = pattern;
+       }
+       result = tomoyo_file_matches_pattern2(filename, filename_end,
+                                             pattern_start, pattern_end);
+       return first ? result : !result;
+}
+
+/**
+ * tomoyo_path_matches_pattern2 - Do pathname pattern matching.
+ *
+ * @f: The start of string to check.
+ * @p: The start of pattern to compare.
+ *
+ * Returns true if @f matches @p, false otherwise.
+ */
+static bool tomoyo_path_matches_pattern2(const char *f, const char *p)
+{
+       const char *f_delimiter;
+       const char *p_delimiter;
+
+       while (*f && *p) {
+               f_delimiter = strchr(f, '/');
+               if (!f_delimiter)
+                       f_delimiter = f + strlen(f);
+               p_delimiter = strchr(p, '/');
+               if (!p_delimiter)
+                       p_delimiter = p + strlen(p);
+               if (*p == '\\' && *(p + 1) == '{')
+                       goto recursive;
+               if (!tomoyo_file_matches_pattern(f, f_delimiter, p,
+                                                p_delimiter))
+                       return false;
+               f = f_delimiter;
+               if (*f)
+                       f++;
+               p = p_delimiter;
+               if (*p)
+                       p++;
+       }
+       /* Ignore trailing "\*" and "\@" in @pattern. */
+       while (*p == '\\' &&
+              (*(p + 1) == '*' || *(p + 1) == '@'))
+               p += 2;
+       return !*f && !*p;
+ recursive:
+       /*
+        * The "\{" pattern is permitted only after '/' character.
+        * This guarantees that below "*(p - 1)" is safe.
+        * Also, the "\}" pattern is permitted only before '/' character
+        * so that "\{" + "\}" pair will not break the "\-" operator.
+        */
+       if (*(p - 1) != '/' || p_delimiter <= p + 3 || *p_delimiter != '/' ||
+           *(p_delimiter - 1) != '}' || *(p_delimiter - 2) != '\\')
+               return false; /* Bad pattern. */
+       do {
+               /* Compare current component with pattern. */
+               if (!tomoyo_file_matches_pattern(f, f_delimiter, p + 2,
+                                                p_delimiter - 2))
+                       break;
+               /* Proceed to next component. */
+               f = f_delimiter;
+               if (!*f)
+                       break;
+               f++;
+               /* Continue comparison. */
+               if (tomoyo_path_matches_pattern2(f, p_delimiter + 1))
+                       return true;
+               f_delimiter = strchr(f, '/');
+       } while (f_delimiter);
+       return false; /* Not matched. */
+}
+
+/**
+ * tomoyo_path_matches_pattern - Check whether the given filename matches the given pattern.
+ *
+ * @filename: The filename to check.
+ * @pattern:  The pattern to compare.
+ *
+ * Returns true if matches, false otherwise.
+ *
+ * The following patterns are available.
+ *   \\     \ itself.
+ *   \ooo   Octal representation of a byte.
+ *   \*     Zero or more repetitions of characters other than '/'.
+ *   \@     Zero or more repetitions of characters other than '/' or '.'.
+ *   \?     1 byte character other than '/'.
+ *   \$     One or more repetitions of decimal digits.
+ *   \+     1 decimal digit.
+ *   \X     One or more repetitions of hexadecimal digits.
+ *   \x     1 hexadecimal digit.
+ *   \A     One or more repetitions of alphabet characters.
+ *   \a     1 alphabet character.
+ *
+ *   \-     Subtraction operator.
+ *
+ *   /\{dir\}/   '/' + 'One or more repetitions of dir/' (e.g. /dir/ /dir/dir/
+ *               /dir/dir/dir/ ).
+ */
+bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
+                                const struct tomoyo_path_info *pattern)
+{
+       const char *f = filename->name;
+       const char *p = pattern->name;
+       const int len = pattern->const_len;
+
+       /* If @pattern doesn't contain pattern, I can use strcmp(). */
+       if (!pattern->is_patterned)
+               return !tomoyo_pathcmp(filename, pattern);
+       /* Don't compare directory and non-directory. */
+       if (filename->is_dir != pattern->is_dir)
+               return false;
+       /* Compare the initial length without patterns. */
+       if (strncmp(f, p, len))
+               return false;
+       f += len;
+       p += len;
+       return tomoyo_path_matches_pattern2(f, p);
+}
+
+/**
+ * tomoyo_get_exe - Get tomoyo_realpath() of current process.
+ *
+ * Returns the tomoyo_realpath() of current process on success, NULL otherwise.
+ *
+ * This function uses kzalloc(), so the caller must call kfree()
+ * if this function didn't return NULL.
+ */
+const char *tomoyo_get_exe(void)
+{
+       struct mm_struct *mm = current->mm;
+       struct vm_area_struct *vma;
+       const char *cp = NULL;
+
+       if (!mm)
+               return NULL;
+       down_read(&mm->mmap_sem);
+       for (vma = mm->mmap; vma; vma = vma->vm_next) {
+               if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) {
+                       cp = tomoyo_realpath_from_path(&vma->vm_file->f_path);
+                       break;
+               }
+       }
+       up_read(&mm->mmap_sem);
+       return cp;
+}
+
+/**
+ * tomoyo_init_request_info - Initialize "struct tomoyo_request_info" members.
+ *
+ * @r:      Pointer to "struct tomoyo_request_info" to initialize.
+ * @domain: Pointer to "struct tomoyo_domain_info". NULL for tomoyo_domain().
+ *
+ * Returns mode.
+ */
+int tomoyo_init_request_info(struct tomoyo_request_info *r,
+                            struct tomoyo_domain_info *domain)
+{
+       memset(r, 0, sizeof(*r));
+       if (!domain)
+               domain = tomoyo_domain();
+       r->domain = domain;
+       r->mode = tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE);
+       return r->mode;
+}
+
+/**
+ * tomoyo_warn_log - Print warning or error message on console.
+ *
+ * @r:   Pointer to "struct tomoyo_request_info".
+ * @fmt: The printf()'s format string, followed by parameters.
+ */
+void tomoyo_warn_log(struct tomoyo_request_info *r, const char *fmt, ...)
+{
+       int len = PAGE_SIZE;
+       va_list args;
+       char *buffer;
+       if (!tomoyo_verbose_mode(r->domain))
+               return;
+       while (1) {
+               int len2;
+               buffer = kmalloc(len, GFP_NOFS);
+               if (!buffer)
+                       return;
+               va_start(args, fmt);
+               len2 = vsnprintf(buffer, len - 1, fmt, args);
+               va_end(args);
+               if (len2 <= len - 1) {
+                       buffer[len2] = '\0';
+                       break;
+               }
+               len = len2 + 1;
+               kfree(buffer);
+       }
+       printk(KERN_WARNING "TOMOYO-%s: Access %s denied for %s\n",
+              r->mode == TOMOYO_CONFIG_ENFORCING ? "ERROR" : "WARNING",
+              buffer, tomoyo_get_last_name(r->domain));
+       kfree(buffer);
+}
+
+/**
+ * tomoyo_domain_quota_is_ok - Check for domain's quota.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ *
+ * Returns true if the domain is not exceeded quota, false otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r)
+{
+       unsigned int count = 0;
+       struct tomoyo_domain_info *domain = r->domain;
+       struct tomoyo_acl_info *ptr;
+
+       if (r->mode != TOMOYO_CONFIG_LEARNING)
+               return false;
+       if (!domain)
+               return true;
+       list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) {
+               switch (ptr->type) {
+                       u16 perm;
+                       u8 i;
+               case TOMOYO_TYPE_PATH_ACL:
+                       perm = container_of(ptr, struct tomoyo_path_acl, head)
+                               ->perm;
+                       for (i = 0; i < TOMOYO_MAX_PATH_OPERATION; i++)
+                               if (perm & (1 << i))
+                                       count++;
+                       if (perm & (1 << TOMOYO_TYPE_READ_WRITE))
+                               count -= 2;
+                       break;
+               case TOMOYO_TYPE_PATH2_ACL:
+                       perm = container_of(ptr, struct tomoyo_path2_acl, head)
+                               ->perm;
+                       for (i = 0; i < TOMOYO_MAX_PATH2_OPERATION; i++)
+                               if (perm & (1 << i))
+                                       count++;
+                       break;
+               case TOMOYO_TYPE_PATH_NUMBER_ACL:
+                       perm = container_of(ptr, struct tomoyo_path_number_acl,
+                                           head)->perm;
+                       for (i = 0; i < TOMOYO_MAX_PATH_NUMBER_OPERATION; i++)
+                               if (perm & (1 << i))
+                                       count++;
+                       break;
+               case TOMOYO_TYPE_PATH_NUMBER3_ACL:
+                       perm = container_of(ptr, struct tomoyo_path_number3_acl,
+                                           head)->perm;
+                       for (i = 0; i < TOMOYO_MAX_PATH_NUMBER3_OPERATION; i++)
+                               if (perm & (1 << i))
+                                       count++;
+                       break;
+               case TOMOYO_TYPE_MOUNT_ACL:
+                       if (!container_of(ptr, struct tomoyo_mount_acl, head)->
+                           is_deleted)
+                               count++;
+               }
+       }
+       if (count < tomoyo_check_flags(domain, TOMOYO_MAX_ACCEPT_ENTRY))
+               return true;
+       if (!domain->quota_warned) {
+               domain->quota_warned = true;
+               printk(KERN_WARNING "TOMOYO-WARNING: "
+                      "Domain '%s' has so many ACLs to hold. "
+                      "Stopped learning mode.\n", domain->domainname->name);
+       }
+       return false;
+}