116 lines
3.7 KiB
C
116 lines
3.7 KiB
C
/*
|
|
* JFFS2 -- Journalling Flash File System, Version 2.
|
|
*
|
|
* Copyright (C) 2004 Ferenc Havasi <havasi@inf.u-szeged.hu>,
|
|
* University of Szeged, Hungary
|
|
*
|
|
* For licensing information, see the file 'LICENCE' in the
|
|
* jffs2 directory.
|
|
*
|
|
* $Id: compr.h,v 1.6 2004/07/16 15:17:57 dwmw2 Exp $
|
|
*
|
|
*/
|
|
|
|
#ifndef __JFFS2_COMPR_H__
|
|
#define __JFFS2_COMPR_H__
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/list.h>
|
|
#include <linux/types.h>
|
|
#include <linux/string.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/jffs2.h>
|
|
#include <linux/jffs2_fs_i.h>
|
|
#include <linux/jffs2_fs_sb.h>
|
|
#include "nodelist.h"
|
|
|
|
#define JFFS2_RUBINMIPS_PRIORITY 10
|
|
#define JFFS2_DYNRUBIN_PRIORITY 20
|
|
#define JFFS2_LZARI_PRIORITY 30
|
|
#define JFFS2_LZO_PRIORITY 40
|
|
#define JFFS2_RTIME_PRIORITY 50
|
|
#define JFFS2_ZLIB_PRIORITY 60
|
|
|
|
#define JFFS2_RUBINMIPS_DISABLED /* RUBINs will be used only */
|
|
#define JFFS2_DYNRUBIN_DISABLED /* for decompression */
|
|
|
|
#define JFFS2_COMPR_MODE_NONE 0
|
|
#define JFFS2_COMPR_MODE_PRIORITY 1
|
|
#define JFFS2_COMPR_MODE_SIZE 2
|
|
|
|
struct jffs2_compressor {
|
|
struct list_head list;
|
|
int priority; /* used by prirority comr. mode */
|
|
char *name;
|
|
char compr; /* JFFS2_COMPR_XXX */
|
|
int (*compress)(unsigned char *data_in, unsigned char *cpage_out,
|
|
uint32_t *srclen, uint32_t *destlen, void *model);
|
|
int (*decompress)(unsigned char *cdata_in, unsigned char *data_out,
|
|
uint32_t cdatalen, uint32_t datalen, void *model);
|
|
int usecount;
|
|
int disabled; /* if seted the compressor won't compress */
|
|
unsigned char *compr_buf; /* used by size compr. mode */
|
|
uint32_t compr_buf_size; /* used by size compr. mode */
|
|
uint32_t stat_compr_orig_size;
|
|
uint32_t stat_compr_new_size;
|
|
uint32_t stat_compr_blocks;
|
|
uint32_t stat_decompr_blocks;
|
|
};
|
|
|
|
int jffs2_register_compressor(struct jffs2_compressor *comp);
|
|
int jffs2_unregister_compressor(struct jffs2_compressor *comp);
|
|
|
|
int jffs2_compressors_init(void);
|
|
int jffs2_compressors_exit(void);
|
|
|
|
uint16_t jffs2_compress(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
|
|
unsigned char *data_in, unsigned char **cpage_out,
|
|
uint32_t *datalen, uint32_t *cdatalen);
|
|
|
|
int jffs2_decompress(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
|
|
uint16_t comprtype, unsigned char *cdata_in,
|
|
unsigned char *data_out, uint32_t cdatalen, uint32_t datalen);
|
|
|
|
void jffs2_free_comprbuf(unsigned char *comprbuf, unsigned char *orig);
|
|
|
|
#ifdef CONFIG_JFFS2_PROC
|
|
int jffs2_enable_compressor_name(const char *name);
|
|
int jffs2_disable_compressor_name(const char *name);
|
|
int jffs2_set_compression_mode_name(const char *mode_name);
|
|
char *jffs2_get_compression_mode_name(void);
|
|
int jffs2_set_compressor_priority(const char *mode_name, int priority);
|
|
char *jffs2_list_compressors(void);
|
|
char *jffs2_stats(void);
|
|
#endif
|
|
|
|
/* Compressor modules */
|
|
/* These functions will be called by jffs2_compressors_init/exit */
|
|
|
|
#ifdef CONFIG_JFFS2_RUBIN
|
|
int jffs2_rubinmips_init(void);
|
|
void jffs2_rubinmips_exit(void);
|
|
int jffs2_dynrubin_init(void);
|
|
void jffs2_dynrubin_exit(void);
|
|
#endif
|
|
#ifdef CONFIG_JFFS2_RTIME
|
|
int jffs2_rtime_init(void);
|
|
void jffs2_rtime_exit(void);
|
|
#endif
|
|
#ifdef CONFIG_JFFS2_ZLIB
|
|
int jffs2_zlib_init(void);
|
|
void jffs2_zlib_exit(void);
|
|
#endif
|
|
#ifdef CONFIG_JFFS2_LZARI
|
|
int jffs2_lzari_init(void);
|
|
void jffs2_lzari_exit(void);
|
|
#endif
|
|
#ifdef CONFIG_JFFS2_LZO
|
|
int jffs2_lzo_init(void);
|
|
void jffs2_lzo_exit(void);
|
|
#endif
|
|
|
|
#endif /* __JFFS2_COMPR_H__ */
|