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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
#ifndef _LINUX_SYSV_FS_H
#define _LINUX_SYSV_FS_H
#if defined(__GNUC__)
# define __packed2__ __attribute__((packed, aligned(2)))
#else
>> I want to scream! <<
#endif
#ifndef __KERNEL__
typedef u16 __fs16;
typedef u32 __fs16;
#endif
/* inode numbers are 16 bit */
typedef __fs16 sysv_ino_t;
/* Block numbers are 24 bit, sometimes stored in 32 bit.
On Coherent FS, they are always stored in PDP-11 manner: the least
significant 16 bits come last. */
typedef __fs32 sysv_zone_t;
/* 0 is non-existent */
#define SYSV_BADBL_INO 1 /* inode of bad blocks file */
#define SYSV_ROOT_INO 2 /* inode of root directory */
/* Xenix super-block data on disk */
#define XENIX_NICINOD 100 /* number of inode cache entries */
#define XENIX_NICFREE 100 /* number of free block list chunk entries */
struct xenix_super_block {
__fs16 s_isize; /* index of first data zone */
__fs32 s_fsize __packed2__; /* total number of zones of this fs */
/* the start of the free block list: */
__fs16 s_nfree; /* number of free blocks in s_free, <= XENIX_NICFREE */
sysv_zone_t s_free[XENIX_NICFREE]; /* first free block list chunk */
/* the cache of free inodes: */
__fs16 s_ninode; /* number of free inodes in s_inode, <= XENIX_NICINOD */
sysv_ino_t s_inode[XENIX_NICINOD]; /* some free inodes */
/* locks, not used by Linux: */
char s_flock; /* lock during free block list manipulation */
char s_ilock; /* lock during inode cache manipulation */
char s_fmod; /* super-block modified flag */
char s_ronly; /* flag whether fs is mounted read-only */
__fs32 s_time __packed2__; /* time of last super block update */
__fs32 s_tfree __packed2__; /* total number of free zones */
__fs16 s_tinode; /* total number of free inodes */
__fs16 s_dinfo[4]; /* device information ?? */
char s_fname[6]; /* file system volume name */
char s_fpack[6]; /* file system pack name */
char s_clean; /* set to 0x46 when filesystem is properly unmounted */
char s_fill[371];
s32 s_magic; /* version of file system */
__fs32 s_type; /* type of file system: 1 for 512 byte blocks
2 for 1024 byte blocks
3 for 2048 byte blocks */
};
/*
* SystemV FS comes in two variants:
* sysv2: System V Release 2 (e.g. Microport), structure elements aligned(2).
* sysv4: System V Release 4 (e.g. Consensys), structure elements aligned(4).
*/
#define SYSV_NICINOD 100 /* number of inode cache entries */
#define SYSV_NICFREE 50 /* number of free block list chunk entries */
/* SystemV4 super-block data on disk */
struct sysv4_super_block {
__fs16 s_isize; /* index of first data zone */
u16 s_pad0;
__fs32 s_fsize; /* total number of zones of this fs */
/* the start of the free block list: */
__fs16 s_nfree; /* number of free blocks in s_free, <= SYSV_NICFREE */
u16 s_pad1;
sysv_zone_t s_free[SYSV_NICFREE]; /* first free block list chunk */
/* the cache of free inodes: */
__fs16 s_ninode; /* number of free inodes in s_inode, <= SYSV_NICINOD */
u16 s_pad2;
sysv_ino_t s_inode[SYSV_NICINOD]; /* some free inodes */
/* locks, not used by Linux: */
char s_flock; /* lock during free block list manipulation */
char s_ilock; /* lock during inode cache manipulation */
char s_fmod; /* super-block modified flag */
char s_ronly; /* flag whether fs is mounted read-only */
__fs32 s_time; /* time of last super block update */
__fs16 s_dinfo[4]; /* device information ?? */
__fs32 s_tfree; /* total number of free zones */
__fs16 s_tinode; /* total number of free inodes */
u16 s_pad3;
char s_fname[6]; /* file system volume name */
char s_fpack[6]; /* file system pack name */
s32 s_fill[12];
__fs32 s_state; /* file system state: 0x7c269d38-s_time means clean */
s32 s_magic; /* version of file system */
__fs32 s_type; /* type of file system: 1 for 512 byte blocks
2 for 1024 byte blocks */
};
/* SystemV2 super-block data on disk */
struct sysv2_super_block {
__fs16 s_isize; /* index of first data zone */
__fs32 s_fsize __packed2__; /* total number of zones of this fs */
/* the start of the free block list: */
__fs16 s_nfree; /* number of free blocks in s_free, <= SYSV_NICFREE */
sysv_zone_t s_free[SYSV_NICFREE]; /* first free block list chunk */
/* the cache of free inodes: */
__fs16 s_ninode; /* number of free inodes in s_inode, <= SYSV_NICINOD */
sysv_ino_t s_inode[SYSV_NICINOD]; /* some free inodes */
/* locks, not used by Linux: */
char s_flock; /* lock during free block list manipulation */
char s_ilock; /* lock during inode cache manipulation */
char s_fmod; /* super-block modified flag */
char s_ronly; /* flag whether fs is mounted read-only */
__fs32 s_time __packed2__; /* time of last super block update */
__fs16 s_dinfo[4]; /* device information ?? */
__fs32 s_tfree __packed2__; /* total number of free zones */
__fs16 s_tinode; /* total number of free inodes */
char s_fname[6]; /* file system volume name */
char s_fpack[6]; /* file system pack name */
s32 s_fill[14];
__fs32 s_state; /* file system state: 0xcb096f43 means clean */
s32 s_magic; /* version of file system */
__fs32 s_type; /* type of file system: 1 for 512 byte blocks
2 for 1024 byte blocks */
};
/* V7 super-block data on disk */
#define V7_NICINOD 100 /* number of inode cache entries */
#define V7_NICFREE 50 /* number of free block list chunk entries */
struct v7_super_block {
__fs16 s_isize; /* index of first data zone */
__fs32 s_fsize __packed2__; /* total number of zones of this fs */
/* the start of the free block list: */
__fs16 s_nfree; /* number of free blocks in s_free, <= V7_NICFREE */
sysv_zone_t s_free[V7_NICFREE]; /* first free block list chunk */
/* the cache of free inodes: */
__fs16 s_ninode; /* number of free inodes in s_inode, <= V7_NICINOD */
sysv_ino_t s_inode[V7_NICINOD]; /* some free inodes */
/* locks, not used by Linux or V7: */
char s_flock; /* lock during free block list manipulation */
char s_ilock; /* lock during inode cache manipulation */
char s_fmod; /* super-block modified flag */
char s_ronly; /* flag whether fs is mounted read-only */
__fs32 s_time __packed2__; /* time of last super block update */
/* the following fields are not maintained by V7: */
__fs32 s_tfree __packed2__; /* total number of free zones */
__fs16 s_tinode; /* total number of free inodes */
__fs16 s_m; /* interleave factor */
__fs16 s_n; /* interleave factor */
char s_fname[6]; /* file system name */
char s_fpack[6]; /* file system pack name */
};
/* Coherent super-block data on disk */
#define COH_NICINOD 100 /* number of inode cache entries */
#define COH_NICFREE 64 /* number of free block list chunk entries */
struct coh_super_block {
__fs16 s_isize; /* index of first data zone */
__fs32 s_fsize __packed2__; /* total number of zones of this fs */
/* the start of the free block list: */
__fs16 s_nfree; /* number of free blocks in s_free, <= COH_NICFREE */
sysv_zone_t s_free[COH_NICFREE] __packed2__; /* first free block list chunk */
/* the cache of free inodes: */
__fs16 s_ninode; /* number of free inodes in s_inode, <= COH_NICINOD */
sysv_ino_t s_inode[COH_NICINOD]; /* some free inodes */
/* locks, not used by Linux: */
char s_flock; /* lock during free block list manipulation */
char s_ilock; /* lock during inode cache manipulation */
char s_fmod; /* super-block modified flag */
char s_ronly; /* flag whether fs is mounted read-only */
__fs32 s_time __packed2__; /* time of last super block update */
__fs32 s_tfree __packed2__; /* total number of free zones */
__fs16 s_tinode; /* total number of free inodes */
__fs16 s_interleave_m; /* interleave factor */
__fs16 s_interleave_n;
char s_fname[6]; /* file system volume name */
char s_fpack[6]; /* file system pack name */
__fs32 s_unique; /* zero, not used */
};
/* SystemV/Coherent inode data on disk */
struct sysv_inode {
__fs16 i_mode;
__fs16 i_nlink;
__fs16 i_uid;
__fs16 i_gid;
__fs32 i_size;
u8 i_data[3*(10+1+1+1)];
u8 i_gen;
__fs32 i_atime; /* time of last access */
__fs32 i_mtime; /* time of last modification */
__fs32 i_ctime; /* time of creation */
};
/* SystemV/Coherent directory entry on disk */
#define SYSV_NAMELEN 14 /* max size of name in struct sysv_dir_entry */
struct sysv_dir_entry {
sysv_ino_t inode;
char name[SYSV_NAMELEN]; /* up to 14 characters, the rest are zeroes */
};
#define SYSV_DIRSIZE sizeof(struct sysv_dir_entry) /* size of every directory entry */
#endif /* _LINUX_SYSV_FS_H */
|
