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1 | #ifndef _LINUX_SYSV_FS_H |
2 | #define _LINUX_SYSV_FS_H | |
3 | ||
dddfbaf8 | 4 | #define __packed2__ __attribute__((packed, aligned(2))) |
1da177e4 LT |
5 | |
6 | ||
7 | #ifndef __KERNEL__ | |
8 | typedef u16 __fs16; | |
9 | typedef u32 __fs16; | |
10 | #endif | |
11 | ||
12 | /* inode numbers are 16 bit */ | |
13 | typedef __fs16 sysv_ino_t; | |
14 | ||
15 | /* Block numbers are 24 bit, sometimes stored in 32 bit. | |
16 | On Coherent FS, they are always stored in PDP-11 manner: the least | |
17 | significant 16 bits come last. */ | |
18 | typedef __fs32 sysv_zone_t; | |
19 | ||
20 | /* 0 is non-existent */ | |
21 | #define SYSV_BADBL_INO 1 /* inode of bad blocks file */ | |
22 | #define SYSV_ROOT_INO 2 /* inode of root directory */ | |
23 | ||
24 | ||
25 | /* Xenix super-block data on disk */ | |
26 | #define XENIX_NICINOD 100 /* number of inode cache entries */ | |
27 | #define XENIX_NICFREE 100 /* number of free block list chunk entries */ | |
28 | struct xenix_super_block { | |
29 | __fs16 s_isize; /* index of first data zone */ | |
30 | __fs32 s_fsize __packed2__; /* total number of zones of this fs */ | |
31 | /* the start of the free block list: */ | |
32 | __fs16 s_nfree; /* number of free blocks in s_free, <= XENIX_NICFREE */ | |
33 | sysv_zone_t s_free[XENIX_NICFREE]; /* first free block list chunk */ | |
34 | /* the cache of free inodes: */ | |
35 | __fs16 s_ninode; /* number of free inodes in s_inode, <= XENIX_NICINOD */ | |
36 | sysv_ino_t s_inode[XENIX_NICINOD]; /* some free inodes */ | |
37 | /* locks, not used by Linux: */ | |
38 | char s_flock; /* lock during free block list manipulation */ | |
39 | char s_ilock; /* lock during inode cache manipulation */ | |
40 | char s_fmod; /* super-block modified flag */ | |
41 | char s_ronly; /* flag whether fs is mounted read-only */ | |
42 | __fs32 s_time __packed2__; /* time of last super block update */ | |
43 | __fs32 s_tfree __packed2__; /* total number of free zones */ | |
44 | __fs16 s_tinode; /* total number of free inodes */ | |
45 | __fs16 s_dinfo[4]; /* device information ?? */ | |
46 | char s_fname[6]; /* file system volume name */ | |
47 | char s_fpack[6]; /* file system pack name */ | |
48 | char s_clean; /* set to 0x46 when filesystem is properly unmounted */ | |
49 | char s_fill[371]; | |
50 | s32 s_magic; /* version of file system */ | |
51 | __fs32 s_type; /* type of file system: 1 for 512 byte blocks | |
52 | 2 for 1024 byte blocks | |
53 | 3 for 2048 byte blocks */ | |
54 | ||
55 | }; | |
56 | ||
57 | /* | |
58 | * SystemV FS comes in two variants: | |
59 | * sysv2: System V Release 2 (e.g. Microport), structure elements aligned(2). | |
60 | * sysv4: System V Release 4 (e.g. Consensys), structure elements aligned(4). | |
61 | */ | |
62 | #define SYSV_NICINOD 100 /* number of inode cache entries */ | |
63 | #define SYSV_NICFREE 50 /* number of free block list chunk entries */ | |
64 | ||
65 | /* SystemV4 super-block data on disk */ | |
66 | struct sysv4_super_block { | |
67 | __fs16 s_isize; /* index of first data zone */ | |
68 | u16 s_pad0; | |
69 | __fs32 s_fsize; /* total number of zones of this fs */ | |
70 | /* the start of the free block list: */ | |
71 | __fs16 s_nfree; /* number of free blocks in s_free, <= SYSV_NICFREE */ | |
72 | u16 s_pad1; | |
73 | sysv_zone_t s_free[SYSV_NICFREE]; /* first free block list chunk */ | |
74 | /* the cache of free inodes: */ | |
75 | __fs16 s_ninode; /* number of free inodes in s_inode, <= SYSV_NICINOD */ | |
76 | u16 s_pad2; | |
77 | sysv_ino_t s_inode[SYSV_NICINOD]; /* some free inodes */ | |
78 | /* locks, not used by Linux: */ | |
79 | char s_flock; /* lock during free block list manipulation */ | |
80 | char s_ilock; /* lock during inode cache manipulation */ | |
81 | char s_fmod; /* super-block modified flag */ | |
82 | char s_ronly; /* flag whether fs is mounted read-only */ | |
83 | __fs32 s_time; /* time of last super block update */ | |
84 | __fs16 s_dinfo[4]; /* device information ?? */ | |
85 | __fs32 s_tfree; /* total number of free zones */ | |
86 | __fs16 s_tinode; /* total number of free inodes */ | |
87 | u16 s_pad3; | |
88 | char s_fname[6]; /* file system volume name */ | |
89 | char s_fpack[6]; /* file system pack name */ | |
90 | s32 s_fill[12]; | |
91 | __fs32 s_state; /* file system state: 0x7c269d38-s_time means clean */ | |
92 | s32 s_magic; /* version of file system */ | |
93 | __fs32 s_type; /* type of file system: 1 for 512 byte blocks | |
94 | 2 for 1024 byte blocks */ | |
95 | }; | |
96 | ||
97 | /* SystemV2 super-block data on disk */ | |
98 | struct sysv2_super_block { | |
99 | __fs16 s_isize; /* index of first data zone */ | |
100 | __fs32 s_fsize __packed2__; /* total number of zones of this fs */ | |
101 | /* the start of the free block list: */ | |
102 | __fs16 s_nfree; /* number of free blocks in s_free, <= SYSV_NICFREE */ | |
103 | sysv_zone_t s_free[SYSV_NICFREE]; /* first free block list chunk */ | |
104 | /* the cache of free inodes: */ | |
105 | __fs16 s_ninode; /* number of free inodes in s_inode, <= SYSV_NICINOD */ | |
106 | sysv_ino_t s_inode[SYSV_NICINOD]; /* some free inodes */ | |
107 | /* locks, not used by Linux: */ | |
108 | char s_flock; /* lock during free block list manipulation */ | |
109 | char s_ilock; /* lock during inode cache manipulation */ | |
110 | char s_fmod; /* super-block modified flag */ | |
111 | char s_ronly; /* flag whether fs is mounted read-only */ | |
112 | __fs32 s_time __packed2__; /* time of last super block update */ | |
113 | __fs16 s_dinfo[4]; /* device information ?? */ | |
114 | __fs32 s_tfree __packed2__; /* total number of free zones */ | |
115 | __fs16 s_tinode; /* total number of free inodes */ | |
116 | char s_fname[6]; /* file system volume name */ | |
117 | char s_fpack[6]; /* file system pack name */ | |
118 | s32 s_fill[14]; | |
119 | __fs32 s_state; /* file system state: 0xcb096f43 means clean */ | |
120 | s32 s_magic; /* version of file system */ | |
121 | __fs32 s_type; /* type of file system: 1 for 512 byte blocks | |
122 | 2 for 1024 byte blocks */ | |
123 | }; | |
124 | ||
125 | /* V7 super-block data on disk */ | |
126 | #define V7_NICINOD 100 /* number of inode cache entries */ | |
127 | #define V7_NICFREE 50 /* number of free block list chunk entries */ | |
128 | struct v7_super_block { | |
129 | __fs16 s_isize; /* index of first data zone */ | |
130 | __fs32 s_fsize __packed2__; /* total number of zones of this fs */ | |
131 | /* the start of the free block list: */ | |
132 | __fs16 s_nfree; /* number of free blocks in s_free, <= V7_NICFREE */ | |
133 | sysv_zone_t s_free[V7_NICFREE]; /* first free block list chunk */ | |
134 | /* the cache of free inodes: */ | |
135 | __fs16 s_ninode; /* number of free inodes in s_inode, <= V7_NICINOD */ | |
136 | sysv_ino_t s_inode[V7_NICINOD]; /* some free inodes */ | |
137 | /* locks, not used by Linux or V7: */ | |
138 | char s_flock; /* lock during free block list manipulation */ | |
139 | char s_ilock; /* lock during inode cache manipulation */ | |
140 | char s_fmod; /* super-block modified flag */ | |
141 | char s_ronly; /* flag whether fs is mounted read-only */ | |
142 | __fs32 s_time __packed2__; /* time of last super block update */ | |
143 | /* the following fields are not maintained by V7: */ | |
144 | __fs32 s_tfree __packed2__; /* total number of free zones */ | |
145 | __fs16 s_tinode; /* total number of free inodes */ | |
146 | __fs16 s_m; /* interleave factor */ | |
147 | __fs16 s_n; /* interleave factor */ | |
148 | char s_fname[6]; /* file system name */ | |
149 | char s_fpack[6]; /* file system pack name */ | |
150 | }; | |
0bcaa65a LR |
151 | /* Constants to aid sanity checking */ |
152 | /* This is not a hard limit, nor enforced by v7 kernel. It's actually just | |
153 | * the limit used by Seventh Edition's ls, though is high enough to assume | |
154 | * that no reasonable file system would have that much entries in root | |
155 | * directory. Thus, if we see anything higher, we just probably got the | |
156 | * endiannes wrong. */ | |
157 | #define V7_NFILES 1024 | |
158 | /* The disk addresses are three-byte (despite direct block addresses being | |
159 | * aligned word-wise in inode). If the most significant byte is non-zero, | |
160 | * something is most likely wrong (not a filesystem, bad bytesex). */ | |
161 | #define V7_MAXSIZE 0x00ffffff | |
1da177e4 LT |
162 | |
163 | /* Coherent super-block data on disk */ | |
164 | #define COH_NICINOD 100 /* number of inode cache entries */ | |
165 | #define COH_NICFREE 64 /* number of free block list chunk entries */ | |
166 | struct coh_super_block { | |
167 | __fs16 s_isize; /* index of first data zone */ | |
168 | __fs32 s_fsize __packed2__; /* total number of zones of this fs */ | |
169 | /* the start of the free block list: */ | |
170 | __fs16 s_nfree; /* number of free blocks in s_free, <= COH_NICFREE */ | |
171 | sysv_zone_t s_free[COH_NICFREE] __packed2__; /* first free block list chunk */ | |
172 | /* the cache of free inodes: */ | |
173 | __fs16 s_ninode; /* number of free inodes in s_inode, <= COH_NICINOD */ | |
174 | sysv_ino_t s_inode[COH_NICINOD]; /* some free inodes */ | |
175 | /* locks, not used by Linux: */ | |
176 | char s_flock; /* lock during free block list manipulation */ | |
177 | char s_ilock; /* lock during inode cache manipulation */ | |
178 | char s_fmod; /* super-block modified flag */ | |
179 | char s_ronly; /* flag whether fs is mounted read-only */ | |
180 | __fs32 s_time __packed2__; /* time of last super block update */ | |
181 | __fs32 s_tfree __packed2__; /* total number of free zones */ | |
182 | __fs16 s_tinode; /* total number of free inodes */ | |
183 | __fs16 s_interleave_m; /* interleave factor */ | |
184 | __fs16 s_interleave_n; | |
185 | char s_fname[6]; /* file system volume name */ | |
186 | char s_fpack[6]; /* file system pack name */ | |
187 | __fs32 s_unique; /* zero, not used */ | |
188 | }; | |
189 | ||
190 | /* SystemV/Coherent inode data on disk */ | |
191 | struct sysv_inode { | |
192 | __fs16 i_mode; | |
193 | __fs16 i_nlink; | |
194 | __fs16 i_uid; | |
195 | __fs16 i_gid; | |
196 | __fs32 i_size; | |
197 | u8 i_data[3*(10+1+1+1)]; | |
198 | u8 i_gen; | |
199 | __fs32 i_atime; /* time of last access */ | |
200 | __fs32 i_mtime; /* time of last modification */ | |
201 | __fs32 i_ctime; /* time of creation */ | |
202 | }; | |
203 | ||
204 | /* SystemV/Coherent directory entry on disk */ | |
205 | #define SYSV_NAMELEN 14 /* max size of name in struct sysv_dir_entry */ | |
206 | struct sysv_dir_entry { | |
207 | sysv_ino_t inode; | |
208 | char name[SYSV_NAMELEN]; /* up to 14 characters, the rest are zeroes */ | |
209 | }; | |
210 | ||
211 | #define SYSV_DIRSIZE sizeof(struct sysv_dir_entry) /* size of every directory entry */ | |
212 | ||
213 | #endif /* _LINUX_SYSV_FS_H */ |