1/*
2 * Squashfs - a compressed read only filesystem for Linux
3 *
4 * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007
5 * Phillip Lougher <phillip@lougher.org.uk>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2,
10 * or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 *
21 * squashfs.h
22 */
23
24#ifdef CONFIG_SQUASHFS_1_0_COMPATIBILITY
25#undef CONFIG_SQUASHFS_1_0_COMPATIBILITY
26#endif
27
28#ifdef SQUASHFS_TRACE
29#define TRACE(s, args...)	printk(KERN_NOTICE "SQUASHFS: "s, ## args)
30#else
31#define TRACE(s, args...)	{}
32#endif
33
34#define ERROR(s, args...)	printk(KERN_ERR "SQUASHFS error: "s, ## args)
35
36#define SERROR(s, args...)	do { \
37				if (!silent) \
38				printk(KERN_ERR "SQUASHFS error: "s, ## args);\
39				} while(0)
40
41#define WARNING(s, args...)	printk(KERN_WARNING "SQUASHFS: "s, ## args)
42
43static inline struct squashfs_inode_info *SQUASHFS_I(struct inode *inode)
44{
45	return list_entry(inode, struct squashfs_inode_info, vfs_inode);
46}
47
48#if defined(CONFIG_SQUASHFS_1_0_COMPATIBILITY) || \
49	defined(CONFIG_SQUASHFS_2_0_COMPATIBILITY)
50#define SQSH_EXTERN
51extern unsigned int squashfs_read_data(struct super_block *s, char *buffer,
52				long long index, unsigned int length,
53				long long *next_index, int srclength);
54extern int squashfs_get_cached_block(struct super_block *s, char *buffer,
55				long long block, unsigned int offset,
56				int length, long long *next_block,
57				unsigned int *next_offset);
58extern void release_cached_fragment(struct squashfs_sb_info *msblk, struct
59					squashfs_fragment_cache *fragment);
60extern struct squashfs_fragment_cache *get_cached_fragment(struct super_block
61					*s, long long start_block,
62					int length);
63extern struct inode *squashfs_iget(struct super_block *s, squashfs_inode_t inode, unsigned int inode_number);
64extern const struct address_space_operations squashfs_symlink_aops;
65extern const struct address_space_operations squashfs_aops;
66extern const struct address_space_operations squashfs_aops_4K;
67extern struct inode_operations squashfs_dir_inode_ops;
68#else
69#define SQSH_EXTERN static
70#endif
71
72#ifdef CONFIG_SQUASHFS_1_0_COMPATIBILITY
73extern int squashfs_1_0_supported(struct squashfs_sb_info *msblk);
74#else
75static inline int squashfs_1_0_supported(struct squashfs_sb_info *msblk)
76{
77	return 0;
78}
79#endif
80
81#ifdef CONFIG_SQUASHFS_2_0_COMPATIBILITY
82extern int squashfs_2_0_supported(struct squashfs_sb_info *msblk);
83#else
84static inline int squashfs_2_0_supported(struct squashfs_sb_info *msblk)
85{
86	return 0;
87}
88#endif
89