image/sanitize.h

   1 /*
   2  * This program is free software; you can redistribute it and/or
   3  * modify it under the terms of the GNU General Public
   4  * License v2 as published by the Free Software Foundation.
   5  *
   6  * This program is distributed in the hope that it will be useful,
   7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   9  * General Public License for more details.
  10  *
  11  * You should have received a copy of the GNU General Public
  12  * License along with this program; if not, write to the
  13  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  14  * Boston, MA 021110-1307, USA.
  15  */
  16
  17 #ifndef __BTRFS_IMAGE_SANITIZE_H__
  18 #define __BTRFS_IMAGE_SANITIZE_H__
  19
  20 #include "kerncompat.h"
  21 #include "image/metadump.h"
  22
  23 struct name {
  24         struct rb_node n;
  25         char *val;
  26         char *sub;
  27         u32 len;
  28 };
  29
  30 /*
  31  * Filenames and xattrs can be obfuscated so they don't appear in the image
  32  * dump. In basic mode (NAMES) a random string will be generated but such names
  33  * do not match the direntry hashes. The advanced mode (COLLISIONS) tries to
  34  * generate names that appear random but also match the hashes. This however
  35  * may take significantly more time than the basic mode. And may not even
  36  * succeed.
  37  */
  38 enum sanitize_mode {
  39         SANITIZE_NONE,
  40         SANITIZE_NAMES,
  41         SANITIZE_COLLISIONS
  42 };
  43
  44 void sanitize_name(enum sanitize_mode sanitize, struct rb_root *name_tree,
  45                 u8 *dst, struct extent_buffer *src, struct btrfs_key *key,
  46                 int slot);
  47
  48 #endif