1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
* Squashfs - a compressed read only filesystem for Linux
*
* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
* Phillip Lougher <phillip@squashfs.org.uk>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2,
* or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* squashfs.h
*/
#include <printk.h>
#include <fs.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#define DEBUG
#define pgoff_t unsigned long
struct squashfs_priv {
struct super_block sb;
};
/*
* We "simulate" the Linux page struct much simpler here
*/
struct page {
pgoff_t index;
void *addr;
struct inode *inode;
};
struct squashfs_page {
struct page real_page;
char **buf;
int idx;
int data_block;
};
static inline struct squashfs_page *squashfs_page(struct page *page)
{
return container_of(page, struct squashfs_page, real_page);
}
#define TRACE(s, args...) pr_debug("SQUASHFS: "s, ## args)
#define ERROR(s, args...) pr_err("SQUASHFS error: "s, ## args)
#define WARNING(s, args...) pr_warn("SQUASHFS: "s, ## args)
struct inode *iget_locked_squashfs(struct super_block *sb, unsigned long ino);
char *squashfs_devread(struct squashfs_sb_info *fs, int byte_offset,
int byte_len);
extern int squashfs_mount(struct fs_device_d *fsdev,
int silent);
extern void squashfs_put_super(struct super_block *sb);
/* block.c */
extern int squashfs_read_data(struct super_block *, u64, int, u64 *,
struct squashfs_page_actor *);
/* cache.c */
extern struct squashfs_cache *squashfs_cache_init(char *, int, int);
extern void squashfs_cache_delete(struct squashfs_cache *);
extern struct squashfs_cache_entry *squashfs_cache_get(struct super_block *,
struct squashfs_cache *, u64, int);
extern void squashfs_cache_put(struct squashfs_cache_entry *);
extern int squashfs_copy_data(void *, struct squashfs_cache_entry *, int, int);
extern int squashfs_read_metadata(struct super_block *, void *, u64 *,
int *, int);
extern struct squashfs_cache_entry *squashfs_get_fragment(struct super_block *,
u64, int);
extern struct squashfs_cache_entry *squashfs_get_datablock(struct super_block *,
u64, int);
extern void *squashfs_read_table(struct super_block *, u64, int);
/* decompressor.c */
extern const struct squashfs_decompressor *squashfs_lookup_decompressor(int);
extern void *squashfs_decompressor_setup(struct super_block *, unsigned short);
/* decompressor_xxx.c */
extern void *squashfs_decompressor_create(struct squashfs_sb_info *, void *);
extern void squashfs_decompressor_destroy(struct squashfs_sb_info *);
extern int squashfs_decompress(struct squashfs_sb_info *, char **,
int, int, int, struct squashfs_page_actor *);
extern int squashfs_max_decompressors(void);
/* fragment.c */
extern int squashfs_frag_lookup(struct super_block *, unsigned int, u64 *);
extern __le64 *squashfs_read_fragment_index_table(struct super_block *,
u64, u64, unsigned int);
/* file.c */
void squashfs_copy_cache(struct page *, struct squashfs_cache_entry *, int,
int);
extern int squashfs_readpage(struct file *file, struct page *page);
/* file_xxx.c */
extern int squashfs_readpage_block(struct page *, u64, int);
/* id.c */
extern int squashfs_get_id(struct super_block *, unsigned int, unsigned int *);
extern __le64 *squashfs_read_id_index_table(struct super_block *, u64, u64,
unsigned short);
/* inode.c */
extern struct inode *squashfs_iget(struct super_block *, long long,
unsigned int);
extern int squashfs_read_inode(struct inode *, long long);
/*
* Inodes, files, decompressor and xattr operations
*/
/* dir.c */
extern const struct file_operations squashfs_dir_ops;
/* export.c */
extern const struct export_operations squashfs_export_ops;
/* file.c */
extern const struct address_space_operations squashfs_aops;
/* inode.c */
extern const struct inode_operations squashfs_inode_ops;
/* namei.c */
extern struct inode *squashfs_lookup(struct inode *dir, const char *cur_name,
unsigned int flags);
extern int squashfs_lookup_next(struct inode *dir,
char *root_name, char *cur_name);
/* symlink.c */
extern const struct address_space_operations squashfs_symlink_aops;
extern const struct inode_operations squashfs_symlink_inode_ops;
|
