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
29struct squashfs_cache {
30	long long	block;
31	int		length;
32	long long	next_index;
33	char		*data;
34};
35
36struct squashfs_fragment_cache {
37	long long	block;
38	int		length;
39	unsigned int	locked;
40	char		*data;
41};
42
43struct 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