ia64/linux-2.6.18-xen.hg

view fs/jffs2/compr.h @ 524:7f8b544237bf

netfront: Allow netfront in domain 0.

This is useful if your physical network device is in a utility domain.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Tue Apr 15 15:18:58 2008 +0100 (2008-04-15)
parents 831230e53067
children
line source
1 /*
2 * JFFS2 -- Journalling Flash File System, Version 2.
3 *
4 * Copyright (C) 2004 Ferenc Havasi <havasi@inf.u-szeged.hu>,
5 * University of Szeged, Hungary
6 *
7 * For licensing information, see the file 'LICENCE' in the
8 * jffs2 directory.
9 *
10 * $Id: compr.h,v 1.9 2005/11/07 11:14:38 gleixner Exp $
11 *
12 */
14 #ifndef __JFFS2_COMPR_H__
15 #define __JFFS2_COMPR_H__
17 #include <linux/kernel.h>
18 #include <linux/vmalloc.h>
19 #include <linux/list.h>
20 #include <linux/types.h>
21 #include <linux/string.h>
22 #include <linux/slab.h>
23 #include <linux/errno.h>
24 #include <linux/fs.h>
25 #include <linux/jffs2.h>
26 #include "jffs2_fs_i.h"
27 #include "jffs2_fs_sb.h"
28 #include "nodelist.h"
30 #define JFFS2_RUBINMIPS_PRIORITY 10
31 #define JFFS2_DYNRUBIN_PRIORITY 20
32 #define JFFS2_LZARI_PRIORITY 30
33 #define JFFS2_LZO_PRIORITY 40
34 #define JFFS2_RTIME_PRIORITY 50
35 #define JFFS2_ZLIB_PRIORITY 60
37 #define JFFS2_RUBINMIPS_DISABLED /* RUBINs will be used only */
38 #define JFFS2_DYNRUBIN_DISABLED /* for decompression */
40 #define JFFS2_COMPR_MODE_NONE 0
41 #define JFFS2_COMPR_MODE_PRIORITY 1
42 #define JFFS2_COMPR_MODE_SIZE 2
44 struct jffs2_compressor {
45 struct list_head list;
46 int priority; /* used by prirority comr. mode */
47 char *name;
48 char compr; /* JFFS2_COMPR_XXX */
49 int (*compress)(unsigned char *data_in, unsigned char *cpage_out,
50 uint32_t *srclen, uint32_t *destlen, void *model);
51 int (*decompress)(unsigned char *cdata_in, unsigned char *data_out,
52 uint32_t cdatalen, uint32_t datalen, void *model);
53 int usecount;
54 int disabled; /* if seted the compressor won't compress */
55 unsigned char *compr_buf; /* used by size compr. mode */
56 uint32_t compr_buf_size; /* used by size compr. mode */
57 uint32_t stat_compr_orig_size;
58 uint32_t stat_compr_new_size;
59 uint32_t stat_compr_blocks;
60 uint32_t stat_decompr_blocks;
61 };
63 int jffs2_register_compressor(struct jffs2_compressor *comp);
64 int jffs2_unregister_compressor(struct jffs2_compressor *comp);
66 int jffs2_compressors_init(void);
67 int jffs2_compressors_exit(void);
69 uint16_t jffs2_compress(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
70 unsigned char *data_in, unsigned char **cpage_out,
71 uint32_t *datalen, uint32_t *cdatalen);
73 int jffs2_decompress(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
74 uint16_t comprtype, unsigned char *cdata_in,
75 unsigned char *data_out, uint32_t cdatalen, uint32_t datalen);
77 void jffs2_free_comprbuf(unsigned char *comprbuf, unsigned char *orig);
79 #ifdef CONFIG_JFFS2_PROC
80 int jffs2_enable_compressor_name(const char *name);
81 int jffs2_disable_compressor_name(const char *name);
82 int jffs2_set_compression_mode_name(const char *mode_name);
83 char *jffs2_get_compression_mode_name(void);
84 int jffs2_set_compressor_priority(const char *mode_name, int priority);
85 char *jffs2_list_compressors(void);
86 char *jffs2_stats(void);
87 #endif
89 /* Compressor modules */
90 /* These functions will be called by jffs2_compressors_init/exit */
92 #ifdef CONFIG_JFFS2_RUBIN
93 int jffs2_rubinmips_init(void);
94 void jffs2_rubinmips_exit(void);
95 int jffs2_dynrubin_init(void);
96 void jffs2_dynrubin_exit(void);
97 #endif
98 #ifdef CONFIG_JFFS2_RTIME
99 int jffs2_rtime_init(void);
100 void jffs2_rtime_exit(void);
101 #endif
102 #ifdef CONFIG_JFFS2_ZLIB
103 int jffs2_zlib_init(void);
104 void jffs2_zlib_exit(void);
105 #endif
107 #endif /* __JFFS2_COMPR_H__ */