source: svn/trunk/newcon3bcm2_21bu/toolchain/mips-linux-uclibc/include/linux/sysv_fs.h

Last change on this file was 2, checked in by jglee, 11 years ago

first commit
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1#ifndef _LINUX_SYSV_FS_H
2#define _LINUX_SYSV_FS_H
3
4#include <asm/types.h>
5
6#if defined(__GNUC__)
7# define __packed2__    __attribute__((packed, aligned(2)))
8#else
9>> I want to scream! <<
10#endif
11
12
13typedef __u16 __fs16;
14typedef __u32 __fs16;
15
16/* inode numbers are 16 bit */
17typedef __fs16 sysv_ino_t;
18
19/* Block numbers are 24 bit, sometimes stored in 32 bit.
20   On Coherent FS, they are always stored in PDP-11 manner: the least
21   significant 16 bits come last. */
22typedef __fs32 sysv_zone_t;
23
24/* 0 is non-existent */
25#define SYSV_BADBL_INO  1       /* inode of bad blocks file */
26#define SYSV_ROOT_INO   2       /* inode of root directory */
27
28
29/* Xenix super-block data on disk */
30#define XENIX_NICINOD   100     /* number of inode cache entries */
31#define XENIX_NICFREE   100     /* number of free block list chunk entries */
32struct xenix_super_block {
33        __fs16          s_isize; /* index of first data zone */
34        __fs32          s_fsize __packed2__; /* total number of zones of this fs */
35        /* the start of the free block list: */
36        __fs16          s_nfree;        /* number of free blocks in s_free, <= XENIX_NICFREE */
37        sysv_zone_t     s_free[XENIX_NICFREE]; /* first free block list chunk */
38        /* the cache of free inodes: */
39        __fs16          s_ninode; /* number of free inodes in s_inode, <= XENIX_NICINOD */
40        sysv_ino_t      s_inode[XENIX_NICINOD]; /* some free inodes */
41        /* locks, not used by Linux: */
42        char            s_flock;        /* lock during free block list manipulation */
43        char            s_ilock;        /* lock during inode cache manipulation */
44        char            s_fmod;         /* super-block modified flag */
45        char            s_ronly;        /* flag whether fs is mounted read-only */
46        __fs32          s_time __packed2__; /* time of last super block update */
47        __fs32          s_tfree __packed2__; /* total number of free zones */
48        __fs16          s_tinode;       /* total number of free inodes */
49        __fs16          s_dinfo[4];     /* device information ?? */
50        char            s_fname[6];     /* file system volume name */
51        char            s_fpack[6];     /* file system pack name */
52        char            s_clean;        /* set to 0x46 when filesystem is properly unmounted */
53        char            s_fill[371];
54        __s32           s_magic;        /* version of file system */
55        __fs32          s_type;         /* type of file system: 1 for 512 byte blocks
56                                                                2 for 1024 byte blocks
57                                                                3 for 2048 byte blocks */
58                                                               
59};
60
61/*
62 * SystemV FS comes in two variants:
63 * sysv2: System V Release 2 (e.g. Microport), structure elements aligned(2).
64 * sysv4: System V Release 4 (e.g. Consensys), structure elements aligned(4).
65 */
66#define SYSV_NICINOD    100     /* number of inode cache entries */
67#define SYSV_NICFREE    50      /* number of free block list chunk entries */
68
69/* SystemV4 super-block data on disk */
70struct sysv4_super_block {
71        __fs16  s_isize;        /* index of first data zone */
72        __u16   s_pad0;
73        __fs32  s_fsize;        /* total number of zones of this fs */
74        /* the start of the free block list: */
75        __fs16  s_nfree;        /* number of free blocks in s_free, <= SYSV_NICFREE */
76        __u16   s_pad1;
77        sysv_zone_t     s_free[SYSV_NICFREE]; /* first free block list chunk */
78        /* the cache of free inodes: */
79        __fs16  s_ninode;       /* number of free inodes in s_inode, <= SYSV_NICINOD */
80        __u16   s_pad2;
81        sysv_ino_t     s_inode[SYSV_NICINOD]; /* some free inodes */
82        /* locks, not used by Linux: */
83        char    s_flock;        /* lock during free block list manipulation */
84        char    s_ilock;        /* lock during inode cache manipulation */
85        char    s_fmod;         /* super-block modified flag */
86        char    s_ronly;        /* flag whether fs is mounted read-only */
87        __fs32  s_time;         /* time of last super block update */
88        __fs16  s_dinfo[4];     /* device information ?? */
89        __fs32  s_tfree;        /* total number of free zones */
90        __fs16  s_tinode;       /* total number of free inodes */
91        __u16   s_pad3;
92        char    s_fname[6];     /* file system volume name */
93        char    s_fpack[6];     /* file system pack name */
94        __s32   s_fill[12];
95        __fs32  s_state;        /* file system state: 0x7c269d38-s_time means clean */
96        __s32   s_magic;        /* version of file system */
97        __fs32  s_type;         /* type of file system: 1 for 512 byte blocks
98                                                                2 for 1024 byte blocks */
99};
100
101/* SystemV2 super-block data on disk */
102struct sysv2_super_block {
103        __fs16  s_isize;                /* index of first data zone */
104        __fs32  s_fsize __packed2__;    /* total number of zones of this fs */
105        /* the start of the free block list: */
106        __fs16  s_nfree;                /* number of free blocks in s_free, <= SYSV_NICFREE */
107        sysv_zone_t s_free[SYSV_NICFREE];       /* first free block list chunk */
108        /* the cache of free inodes: */
109        __fs16  s_ninode;               /* number of free inodes in s_inode, <= SYSV_NICINOD */
110        sysv_ino_t     s_inode[SYSV_NICINOD]; /* some free inodes */
111        /* locks, not used by Linux: */
112        char    s_flock;                /* lock during free block list manipulation */
113        char    s_ilock;                /* lock during inode cache manipulation */
114        char    s_fmod;                 /* super-block modified flag */
115        char    s_ronly;                /* flag whether fs is mounted read-only */
116        __fs32  s_time __packed2__;     /* time of last super block update */
117        __fs16  s_dinfo[4];             /* device information ?? */
118        __fs32  s_tfree __packed2__;    /* total number of free zones */
119        __fs16  s_tinode;               /* total number of free inodes */
120        char    s_fname[6];             /* file system volume name */
121        char    s_fpack[6];             /* file system pack name */
122        __s32   s_fill[14];
123        __fs32  s_state;                /* file system state: 0xcb096f43 means clean */
124        __s32   s_magic;                /* version of file system */
125        __fs32  s_type;                 /* type of file system: 1 for 512 byte blocks
126                                                                2 for 1024 byte blocks */
127};
128
129/* V7 super-block data on disk */
130#define V7_NICINOD     100     /* number of inode cache entries */
131#define V7_NICFREE     50      /* number of free block list chunk entries */
132struct v7_super_block {
133        __fs16 s_isize;        /* index of first data zone */
134        __fs32 s_fsize __packed2__; /* total number of zones of this fs */
135        /* the start of the free block list: */
136        __fs16 s_nfree;        /* number of free blocks in s_free, <= V7_NICFREE */
137        sysv_zone_t s_free[V7_NICFREE]; /* first free block list chunk */
138        /* the cache of free inodes: */
139        __fs16 s_ninode;       /* number of free inodes in s_inode, <= V7_NICINOD */
140        sysv_ino_t      s_inode[V7_NICINOD]; /* some free inodes */
141        /* locks, not used by Linux or V7: */
142        char    s_flock;        /* lock during free block list manipulation */
143        char    s_ilock;        /* lock during inode cache manipulation */
144        char    s_fmod;         /* super-block modified flag */
145        char    s_ronly;        /* flag whether fs is mounted read-only */
146        __fs32  s_time __packed2__; /* time of last super block update */
147        /* the following fields are not maintained by V7: */
148        __fs32  s_tfree __packed2__; /* total number of free zones */
149        __fs16  s_tinode;       /* total number of free inodes */
150        __fs16  s_m;            /* interleave factor */
151        __fs16  s_n;            /* interleave factor */
152        char    s_fname[6];     /* file system name */
153        char    s_fpack[6];     /* file system pack name */
154};
155
156/* Coherent super-block data on disk */
157#define COH_NICINOD     100     /* number of inode cache entries */
158#define COH_NICFREE     64      /* number of free block list chunk entries */
159struct coh_super_block {
160        __fs16          s_isize;        /* index of first data zone */
161        __fs32          s_fsize __packed2__; /* total number of zones of this fs */
162        /* the start of the free block list: */
163        __fs16 s_nfree; /* number of free blocks in s_free, <= COH_NICFREE */
164        sysv_zone_t     s_free[COH_NICFREE] __packed2__; /* first free block list chunk */
165        /* the cache of free inodes: */
166        __fs16          s_ninode;       /* number of free inodes in s_inode, <= COH_NICINOD */
167        sysv_ino_t      s_inode[COH_NICINOD]; /* some free inodes */
168        /* locks, not used by Linux: */
169        char            s_flock;        /* lock during free block list manipulation */
170        char            s_ilock;        /* lock during inode cache manipulation */
171        char            s_fmod;         /* super-block modified flag */
172        char            s_ronly;        /* flag whether fs is mounted read-only */
173        __fs32          s_time __packed2__; /* time of last super block update */
174        __fs32          s_tfree __packed2__; /* total number of free zones */
175        __fs16          s_tinode;       /* total number of free inodes */
176        __fs16          s_interleave_m; /* interleave factor */
177        __fs16          s_interleave_n;
178        char            s_fname[6];     /* file system volume name */
179        char            s_fpack[6];     /* file system pack name */
180        __fs32          s_unique;       /* zero, not used */
181};
182
183/* SystemV/Coherent inode data on disk */
184struct sysv_inode {
185        __fs16 i_mode;
186        __fs16 i_nlink;
187        __fs16 i_uid;
188        __fs16 i_gid;
189        __fs32 i_size;
190        __u8  i_data[3*(10+1+1+1)];
191        __u8  i_gen;
192        __fs32 i_atime; /* time of last access */
193        __fs32 i_mtime; /* time of last modification */
194        __fs32 i_ctime; /* time of creation */
195};
196
197/* SystemV/Coherent directory entry on disk */
198#define SYSV_NAMELEN    14      /* max size of name in struct sysv_dir_entry */
199struct sysv_dir_entry {
200        sysv_ino_t inode;
201        char name[SYSV_NAMELEN]; /* up to 14 characters, the rest are zeroes */
202};
203
204#define SYSV_DIRSIZE    sizeof(struct sysv_dir_entry)   /* size of every directory entry */
205
206#endif /* _LINUX_SYSV_FS_H */
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