blob: 5715b1f7aa4b9066b975941d483dc7a202096592 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/*
* JFFS2 -- Journalling Flash File System, Version 2.
*
* Copyright (C) 2004 Ferenc Havasi <havasi@inf.u-szeged.hu>,
* Zoltan Sogor <weth@inf.u-szeged.hu>,
* Patrik Kluba <pajko@halom.u-szeged.hu>,
* University of Szeged, Hungary
*
* For licensing information, see the file 'LICENCE' in this directory.
*
* $Id: summary.h,v 1.7 2006/02/15 09:42:34 havasi Exp $
*
*/
#ifndef JFFS2_SUMMARY_H
#define JFFS2_SUMMARY_H
#include <linux/uio.h>
#include <linux/jffs2.h>
#define DIRTY_SPACE(x) do { typeof(x) _x = (x); \
c->free_size -= _x; c->dirty_size += _x; \
jeb->free_size -= _x ; jeb->dirty_size += _x; \
}while(0)
#define USED_SPACE(x) do { typeof(x) _x = (x); \
c->free_size -= _x; c->used_size += _x; \
jeb->free_size -= _x ; jeb->used_size += _x; \
}while(0)
#define WASTED_SPACE(x) do { typeof(x) _x = (x); \
c->free_size -= _x; c->wasted_size += _x; \
jeb->free_size -= _x ; jeb->wasted_size += _x; \
}while(0)
#define UNCHECKED_SPACE(x) do { typeof(x) _x = (x); \
c->free_size -= _x; c->unchecked_size += _x; \
jeb->free_size -= _x ; jeb->unchecked_size += _x; \
}while(0)
#define BLK_STATE_ALLFF 0
#define BLK_STATE_CLEAN 1
#define BLK_STATE_PARTDIRTY 2
#define BLK_STATE_CLEANMARKER 3
#define BLK_STATE_ALLDIRTY 4
#define BLK_STATE_BADBLOCK 5
#define JFFS2_SUMMARY_NOSUM_SIZE 0xffffffff
#define JFFS2_SUMMARY_INODE_SIZE (sizeof(struct jffs2_sum_inode_flash))
#define JFFS2_SUMMARY_DIRENT_SIZE(x) (sizeof(struct jffs2_sum_dirent_flash) + (x))
#define JFFS2_SUMMARY_XATTR_SIZE (sizeof(struct jffs2_sum_xattr_flash))
#define JFFS2_SUMMARY_XREF_SIZE (sizeof(struct jffs2_sum_xref_flash))
/* Summary structures used on flash */
struct jffs2_sum_unknown_flash
{
jint16_t nodetype; /* node type */
} __attribute__((packed));
struct jffs2_sum_inode_flash
{
jint16_t nodetype; /* node type */
jint32_t inode; /* inode number */
jint32_t version; /* inode version */
jint32_t offset; /* offset on jeb */
jint32_t totlen; /* record length */
} __attribute__((packed));
struct jffs2_sum_dirent_flash
{
jint16_t nodetype; /* == JFFS_NODETYPE_DIRENT */
jint32_t totlen; /* record length */
jint32_t offset; /* ofset on jeb */
jint32_t pino; /* parent inode */
jint32_t version; /* dirent version */
jint32_t ino; /* == zero for unlink */
uint8_t nsize; /* dirent name size */
uint8_t type; /* dirent type */
uint8_t name[0]; /* dirent name */
} __attribute__((packed));
struct jffs2_sum_xattr_flash
{
jint16_t nodetype; /* == JFFS2_NODETYPE_XATR */
jint32_t xid; /* xattr identifier */
jint32_t version; /* version number */
jint32_t offset; /* offset on jeb */
jint32_t totlen; /* node length */
} __attribute__((packed));
struct jffs2_sum_xref_flash
{
jint16_t nodetype; /* == JFFS2_NODETYPE_XREF */
jint32_t offset; /* offset on jeb */
} __attribute__((packed));
union jffs2_sum_flash
{
struct jffs2_sum_unknown_flash u;
struct jffs2_sum_inode_flash i;
struct jffs2_sum_dirent_flash d;
struct jffs2_sum_xattr_flash x;
struct jffs2_sum_xref_flash r;
};
/* Summary structures used in the memory */
struct jffs2_sum_unknown_mem
{
union jffs2_sum_mem *next;
jint16_t nodetype; /* node type */
} __attribute__((packed));
struct jffs2_sum_inode_mem
{
union jffs2_sum_mem *next;
jint16_t nodetype; /* node type */
jint32_t inode; /* inode number */
jint32_t version; /* inode version */
jint32_t offset; /* offset on jeb */
jint32_t totlen; /* record length */
} __attribute__((packed));
struct jffs2_sum_dirent_mem
{
union jffs2_sum_mem *next;
jint16_t nodetype; /* == JFFS_NODETYPE_DIRENT */
jint32_t totlen; /* record length */
jint32_t offset; /* ofset on jeb */
jint32_t pino; /* parent inode */
jint32_t version; /* dirent version */
jint32_t ino; /* == zero for unlink */
uint8_t nsize; /* dirent name size */
uint8_t type; /* dirent type */
uint8_t name[0]; /* dirent name */
} __attribute__((packed));
struct jffs2_sum_xattr_mem
{
union jffs2_sum_mem *next;
jint16_t nodetype;
jint32_t xid;
jint32_t version;
jint32_t offset;
jint32_t totlen;
} __attribute__((packed));
struct jffs2_sum_xref_mem
{
union jffs2_sum_mem *next;
jint16_t nodetype;
jint32_t offset;
} __attribute__((packed));
union jffs2_sum_mem
{
struct jffs2_sum_unknown_mem u;
struct jffs2_sum_inode_mem i;
struct jffs2_sum_dirent_mem d;
struct jffs2_sum_xattr_mem x;
struct jffs2_sum_xref_mem r;
};
struct jffs2_summary
{
uint32_t sum_size;
uint32_t sum_num;
uint32_t sum_padded;
union jffs2_sum_mem *sum_list_head;
union jffs2_sum_mem *sum_list_tail;
};
/* Summary marker is stored at the end of every sumarized erase block */
struct jffs2_sum_marker
{
jint32_t offset; /* offset of the summary node in the jeb */
jint32_t magic; /* == JFFS2_SUM_MAGIC */
};
#define JFFS2_SUMMARY_FRAME_SIZE (sizeof(struct jffs2_raw_summary) + sizeof(struct jffs2_sum_marker))
#endif
|
