1 #ifndef SQUASHFS_FS_SB 2 #define SQUASHFS_FS_SB 3 /* 4 * Squashfs 5 * 6 * Copyright (c) 2002, 2003, 2004, 2005, 2006 7 * Phillip Lougher <phillip@lougher.demon.co.uk> 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License 11 * as published by the Free Software Foundation; either version 2, 12 * or (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 22 * 23 * squashfs_fs_sb.h 24 */ 25 26 #include <linux/squashfs_fs.h> 27 #include <linux/zlib.h> 28 29 struct squashfs_cache { 30 long long block; 31 int length; 32 long long next_index; 33 char *data; 34 }; 35 36 struct squashfs_fragment_cache { 37 long long block; 38 int length; 39 unsigned int locked; 40 char *data; 41 }; 42 43 struct squashfs_sb_info { 44 struct squashfs_super_block sblk; 45 int devblksize; 46 int devblksize_log2; 47 int swap; 48 struct squashfs_cache *block_cache; 49 struct squashfs_fragment_cache *fragment; 50 int next_cache; 51 int next_fragment; 52 int next_meta_index; 53 unsigned int *uid; 54 unsigned int *guid; 55 long long *fragment_index; 56 unsigned int *fragment_index_2; 57 unsigned int read_size; 58 char *read_data; 59 char *read_page; 60 struct semaphore read_data_mutex; 61 struct semaphore read_page_mutex; 62 struct semaphore block_cache_mutex; 63 struct semaphore fragment_mutex; 64 struct semaphore meta_index_mutex; 65 wait_queue_head_t waitq; 66 wait_queue_head_t fragment_wait_queue; 67 struct meta_index *meta_index; 68 z_stream stream; 69 struct inode *(*iget)(struct super_block *s, squashfs_inode_t 70 inode); 71 long long (*read_blocklist)(struct inode *inode, int 72 index, int readahead_blks, char *block_list, 73 unsigned short **block_p, unsigned int *bsize); 74 int (*read_fragment_index_table)(struct super_block *s); 75 }; 76 #endif 77