include/linux/squashfs_fs_sb.h

   1 #ifndef SQUASHFS_FS_SB
   2 #define SQUASHFS_FS_SB
   3 /*
   4  * Squashfs
   5  *
   6  * Copyright (c) 2002, 2003, 2004, 2005 Phillip Lougher <phillip@lougher.demon.co.uk>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * as published by the Free Software Foundation; either version 2,
  11  * or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  21  *
  22  * squashfs_fs_sb.h
  23  */
  24
  25 #include <linux/squashfs_fs.h>
  26
  27 typedef struct {
  28         unsigned int    block;
  29         int             length;
  30         unsigned int    next_index;
  31         char            *data;
  32         } squashfs_cache;
  33
  34 struct squashfs_fragment_cache {
  35         unsigned int    block;
  36         int             length;
  37         unsigned int    locked;
  38         char            *data;
  39         };
  40
  41 typedef struct squashfs_sb_info {
  42         squashfs_super_block    sBlk;
  43         int                     devblksize;
  44         int                     devblksize_log2;
  45         int                     swap;
  46         squashfs_cache          *block_cache;
  47         struct squashfs_fragment_cache  *fragment;
  48         int                     next_cache;
  49         int                     next_fragment;
  50         squashfs_uid            *uid;
  51         squashfs_uid            *guid;
  52         squashfs_fragment_index         *fragment_index;
  53         unsigned int            read_size;
  54         char                    *read_data;
  55         char                    *read_page;
  56         struct semaphore        read_page_mutex;
  57         struct semaphore        block_cache_mutex;
  58         struct semaphore        fragment_mutex;
  59         wait_queue_head_t       waitq;
  60         wait_queue_head_t       fragment_wait_queue;
  61         struct inode            *(*iget)(struct super_block *s, squashfs_inode inode);
  62         unsigned int            (*read_blocklist)(struct inode *inode, int index, int readahead_blks,
  63                                         char *block_list, unsigned short **block_p, unsigned int *bsize);
  64         } squashfs_sb_info;
  65 #endif