diff options
Diffstat (limited to 'compr.h')
| -rw-r--r-- | compr.h | 115 |
1 files changed, 115 insertions, 0 deletions
@@ -0,0 +1,115 @@ +/* + * 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 1.7 2005/11/07 11:15:09 gleixner Exp $ + * + */ + +#ifndef __JFFS2_COMPR_H__ +#define __JFFS2_COMPR_H__ + +#include <stdio.h> +#include <stdlib.h> +#include <stdint.h> +#include "linux/jffs2.h" + +#define CONFIG_JFFS2_ZLIB +#define CONFIG_JFFS2_RTIME + +#define JFFS2_RUBINMIPS_PRIORITY 10 +#define JFFS2_DYNRUBIN_PRIORITY 20 +#define JFFS2_RTIME_PRIORITY 50 +#define JFFS2_ZLIB_PRIORITY 60 + +#define JFFS2_COMPR_MODE_NONE 0 +#define JFFS2_COMPR_MODE_PRIORITY 1 +#define JFFS2_COMPR_MODE_SIZE 2 + +#define kmalloc(a,b) malloc(a) +#define kfree(a) free(a) +#ifndef GFP_KERNEL +#define GFP_KERNEL 0 +#endif + +#define vmalloc(a) malloc(a) +#define vfree(a) free(a) + +#define printk(...) fprintf(stderr,__VA_ARGS__) + +#define KERN_EMERG +#define KERN_ALERT +#define KERN_CRIT +#define KERN_ERR +#define KERN_WARNING +#define KERN_NOTICE +#define KERN_INFO +#define KERN_DEBUG + +struct list_head { + struct list_head *next, *prev; +}; + +void jffs2_set_compression_mode(int mode); +int jffs2_get_compression_mode(void); +int jffs2_set_compression_mode_name(const char *mode_name); + +int jffs2_enable_compressor_name(const char *name); +int jffs2_disable_compressor_name(const char *name); + +int jffs2_set_compressor_priority(const char *name, int priority); + +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(unsigned char *data_in, unsigned char **cpage_out, + uint32_t *datalen, uint32_t *cdatalen); + +/* If it is setted, a decompress will be called after every compress */ +void jffs2_compression_check_set(int yesno); +int jffs2_compression_check_get(void); +int jffs2_compression_check_errorcnt_get(void); + +char *jffs2_list_compressors(void); +char *jffs2_stats(void); + +/* Compressor modules */ + +/* These functions will be called by jffs2_compressors_init/exit */ +#ifdef CONFIG_JFFS2_ZLIB +int jffs2_zlib_init(void); +void jffs2_zlib_exit(void); +#endif +#ifdef CONFIG_JFFS2_RTIME +int jffs2_rtime_init(void); +void jffs2_rtime_exit(void); +#endif + +#endif /* __JFFS2_COMPR_H__ */ |