security/tomoyo/realpath.h

   1 /*
   2  * security/tomoyo/realpath.h
   3  *
   4  * Get the canonicalized absolute pathnames. The basis for TOMOYO.
   5  *
   6  * Copyright (C) 2005-2009  NTT DATA CORPORATION
   7  *
   8  * Version: 2.2.0   2009/04/01
   9  *
  10  */
  11
  12 #ifndef _SECURITY_TOMOYO_REALPATH_H
  13 #define _SECURITY_TOMOYO_REALPATH_H
  14
  15 struct path;
  16 struct tomoyo_path_info;
  17 struct tomoyo_io_buffer;
  18
  19 /* Convert binary string to ascii string. */
  20 int tomoyo_encode(char *buffer, int buflen, const char *str);
  21
  22 /* Returns realpath(3) of the given pathname but ignores chroot'ed root. */
  23 int tomoyo_realpath_from_path2(struct path *path, char *newname,
  24                                int newname_len);
  25
  26 /*
  27  * Returns realpath(3) of the given pathname but ignores chroot'ed root.
  28  * These functions use tomoyo_alloc(), so the caller must call tomoyo_free()
  29  * if these functions didn't return NULL.
  30  */
  31 char *tomoyo_realpath(const char *pathname);
  32 /*
  33  * Same with tomoyo_realpath() except that it doesn't follow the final symlink.
  34  */
  35 char *tomoyo_realpath_nofollow(const char *pathname);
  36 /* Same with tomoyo_realpath() except that the pathname is already solved. */
  37 char *tomoyo_realpath_from_path(struct path *path);
  38
  39 /*
  40  * Allocate memory for ACL entry.
  41  * The RAM is chunked, so NEVER try to kfree() the returned pointer.
  42  */
  43 void *tomoyo_alloc_element(const unsigned int size);
  44
  45 /*
  46  * Keep the given name on the RAM.
  47  * The RAM is shared, so NEVER try to modify or kfree() the returned name.
  48  */
  49 const struct tomoyo_path_info *tomoyo_save_name(const char *name);
  50
  51 /* Allocate memory for temporary use (e.g. permission checks). */
  52 void *tomoyo_alloc(const size_t size);
  53
  54 /* Free memory allocated by tomoyo_alloc(). */
  55 void tomoyo_free(const void *p);
  56
  57 /* Check for memory usage. */
  58 int tomoyo_read_memory_counter(struct tomoyo_io_buffer *head);
  59
  60 /* Set memory quota. */
  61 int tomoyo_write_memory_quota(struct tomoyo_io_buffer *head);
  62
  63 /* Initialize realpath related code. */
  64 void __init tomoyo_realpath_init(void);
  65
  66 #endif /* !defined(_SECURITY_TOMOYO_REALPATH_H) */