143 lines
4.5 KiB
C
143 lines
4.5 KiB
C
/*
|
|
* 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;
|