1*10465441SEvalZero /* 2*10465441SEvalZero * JFFS2 -- Journalling Flash File System, Version 2. 3*10465441SEvalZero * 4*10465441SEvalZero * Copyright (C) 2004 Ferenc Havasi <[email protected]>, 5*10465441SEvalZero * University of Szeged, Hungary 6*10465441SEvalZero * 7*10465441SEvalZero * For licensing information, see the file 'LICENCE' in the 8*10465441SEvalZero * jffs2 directory. 9*10465441SEvalZero * 10*10465441SEvalZero * $Id: compr.h,v 1.8 2005/07/26 13:24:40 havasi Exp $ 11*10465441SEvalZero * 12*10465441SEvalZero */ 13*10465441SEvalZero 14*10465441SEvalZero #ifndef __JFFS2_COMPR_H__ 15*10465441SEvalZero #define __JFFS2_COMPR_H__ 16*10465441SEvalZero 17*10465441SEvalZero #include <linux/kernel.h> 18*10465441SEvalZero #include <linux/vmalloc.h> 19*10465441SEvalZero #include <linux/list.h> 20*10465441SEvalZero #include <linux/types.h> 21*10465441SEvalZero #include <linux/string.h> 22*10465441SEvalZero #include <linux/slab.h> 23*10465441SEvalZero #include <linux/errno.h> 24*10465441SEvalZero #include <linux/fs.h> 25*10465441SEvalZero #include <linux/jffs2.h> 26*10465441SEvalZero #include <linux/jffs2_fs_i.h> 27*10465441SEvalZero #include <linux/jffs2_fs_sb.h> 28*10465441SEvalZero #include "nodelist.h" 29*10465441SEvalZero 30*10465441SEvalZero #define JFFS2_RUBINMIPS_PRIORITY 10 31*10465441SEvalZero #define JFFS2_DYNRUBIN_PRIORITY 20 32*10465441SEvalZero #define JFFS2_LZARI_PRIORITY 30 33*10465441SEvalZero #define JFFS2_LZO_PRIORITY 40 34*10465441SEvalZero #define JFFS2_RTIME_PRIORITY 50 35*10465441SEvalZero #define JFFS2_ZLIB_PRIORITY 60 36*10465441SEvalZero 37*10465441SEvalZero #define JFFS2_RUBINMIPS_DISABLED /* RUBINs will be used only */ 38*10465441SEvalZero #define JFFS2_DYNRUBIN_DISABLED /* for decompression */ 39*10465441SEvalZero 40*10465441SEvalZero #define JFFS2_COMPR_MODE_NONE 0 41*10465441SEvalZero #define JFFS2_COMPR_MODE_PRIORITY 1 42*10465441SEvalZero #define JFFS2_COMPR_MODE_SIZE 2 43*10465441SEvalZero 44*10465441SEvalZero struct jffs2_compressor { 45*10465441SEvalZero struct list_head list; 46*10465441SEvalZero int priority; /* used by prirority comr. mode */ 47*10465441SEvalZero char *name; 48*10465441SEvalZero char compr; /* JFFS2_COMPR_XXX */ 49*10465441SEvalZero int (*compress)(unsigned char *data_in, unsigned char *cpage_out, 50*10465441SEvalZero uint32_t *srclen, uint32_t *destlen, void *model); 51*10465441SEvalZero int (*decompress)(unsigned char *cdata_in, unsigned char *data_out, 52*10465441SEvalZero uint32_t cdatalen, uint32_t datalen, void *model); 53*10465441SEvalZero int usecount; 54*10465441SEvalZero int disabled; /* if seted the compressor won't compress */ 55*10465441SEvalZero unsigned char *compr_buf; /* used by size compr. mode */ 56*10465441SEvalZero uint32_t compr_buf_size; /* used by size compr. mode */ 57*10465441SEvalZero uint32_t stat_compr_orig_size; 58*10465441SEvalZero uint32_t stat_compr_new_size; 59*10465441SEvalZero uint32_t stat_compr_blocks; 60*10465441SEvalZero uint32_t stat_decompr_blocks; 61*10465441SEvalZero }; 62*10465441SEvalZero 63*10465441SEvalZero int jffs2_register_compressor(struct jffs2_compressor *comp); 64*10465441SEvalZero int jffs2_unregister_compressor(struct jffs2_compressor *comp); 65*10465441SEvalZero 66*10465441SEvalZero int jffs2_compressors_init(void); 67*10465441SEvalZero int jffs2_compressors_exit(void); 68*10465441SEvalZero 69*10465441SEvalZero uint16_t jffs2_compress(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 70*10465441SEvalZero unsigned char *data_in, unsigned char **cpage_out, 71*10465441SEvalZero uint32_t *datalen, uint32_t *cdatalen); 72*10465441SEvalZero 73*10465441SEvalZero int jffs2_decompress(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 74*10465441SEvalZero uint16_t comprtype, unsigned char *cdata_in, 75*10465441SEvalZero unsigned char *data_out, uint32_t cdatalen, uint32_t datalen); 76*10465441SEvalZero 77*10465441SEvalZero void jffs2_free_comprbuf(unsigned char *comprbuf, unsigned char *orig); 78*10465441SEvalZero 79*10465441SEvalZero #ifdef CONFIG_JFFS2_PROC 80*10465441SEvalZero int jffs2_enable_compressor_name(const char *name); 81*10465441SEvalZero int jffs2_disable_compressor_name(const char *name); 82*10465441SEvalZero int jffs2_set_compression_mode_name(const char *mode_name); 83*10465441SEvalZero char *jffs2_get_compression_mode_name(void); 84*10465441SEvalZero int jffs2_set_compressor_priority(const char *mode_name, int priority); 85*10465441SEvalZero char *jffs2_list_compressors(void); 86*10465441SEvalZero char *jffs2_stats(void); 87*10465441SEvalZero #endif 88*10465441SEvalZero 89*10465441SEvalZero /* Compressor modules */ 90*10465441SEvalZero /* These functions will be called by jffs2_compressors_init/exit */ 91*10465441SEvalZero 92*10465441SEvalZero #ifdef CONFIG_JFFS2_RUBIN 93*10465441SEvalZero int jffs2_rubinmips_init(void); 94*10465441SEvalZero void jffs2_rubinmips_exit(void); 95*10465441SEvalZero int jffs2_dynrubin_init(void); 96*10465441SEvalZero void jffs2_dynrubin_exit(void); 97*10465441SEvalZero #endif 98*10465441SEvalZero #ifdef CONFIG_JFFS2_RTIME 99*10465441SEvalZero int jffs2_rtime_init(void); 100*10465441SEvalZero void jffs2_rtime_exit(void); 101*10465441SEvalZero #endif 102*10465441SEvalZero #ifdef CONFIG_JFFS2_ZLIB 103*10465441SEvalZero int jffs2_zlib_init(void); 104*10465441SEvalZero void jffs2_zlib_exit(void); 105*10465441SEvalZero #endif 106*10465441SEvalZero 107*10465441SEvalZero #endif /* __JFFS2_COMPR_H__ */ 108