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authorDavid Woodhouse <dwmw2@shinybook.infradead.org>2006-04-11 19:09:16 -0400
committerDavid Woodhouse <dwmw2@shinybook.infradead.org>2006-04-11 19:09:16 -0400
commit72212c137c574b564723327af751c4054c7cfca6 (patch)
tree13be2da9d4be695002d6ea9c396660c986e5fa5c /compr.h
Initial commit
Diffstat (limited to 'compr.h')
-rw-r--r--compr.h115
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diff --git a/compr.h b/compr.h
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+++ b/compr.h
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+/*
+ * 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__ */