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1da177e4 LT |
1 | #ifndef _LINUX_MINIX_FS_H |
2 | #define _LINUX_MINIX_FS_H | |
3 | ||
4 | /* | |
5 | * The minix filesystem constants/structures | |
6 | */ | |
7 | ||
8 | /* | |
9 | * Thanks to Kees J Bot for sending me the definitions of the new | |
10 | * minix filesystem (aka V2) with bigger inodes and 32-bit block | |
11 | * pointers. | |
12 | */ | |
13 | ||
14 | #define MINIX_ROOT_INO 1 | |
15 | ||
16 | /* Not the same as the bogus LINK_MAX in <linux/limits.h>. Oh well. */ | |
17 | #define MINIX_LINK_MAX 250 | |
18 | #define MINIX2_LINK_MAX 65530 | |
19 | ||
20 | #define MINIX_I_MAP_SLOTS 8 | |
21 | #define MINIX_Z_MAP_SLOTS 64 | |
22 | #define MINIX_SUPER_MAGIC 0x137F /* original minix fs */ | |
23 | #define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */ | |
24 | #define MINIX2_SUPER_MAGIC 0x2468 /* minix V2 fs */ | |
25 | #define MINIX2_SUPER_MAGIC2 0x2478 /* minix V2 fs, 30 char names */ | |
26 | #define MINIX_VALID_FS 0x0001 /* Clean fs. */ | |
27 | #define MINIX_ERROR_FS 0x0002 /* fs has errors. */ | |
28 | ||
29 | #define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode))) | |
30 | #define MINIX2_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix2_inode))) | |
31 | ||
32 | /* | |
33 | * This is the original minix inode layout on disk. | |
34 | * Note the 8-bit gid and atime and ctime. | |
35 | */ | |
36 | struct minix_inode { | |
37 | __u16 i_mode; | |
38 | __u16 i_uid; | |
39 | __u32 i_size; | |
40 | __u32 i_time; | |
41 | __u8 i_gid; | |
42 | __u8 i_nlinks; | |
43 | __u16 i_zone[9]; | |
44 | }; | |
45 | ||
46 | /* | |
47 | * The new minix inode has all the time entries, as well as | |
48 | * long block numbers and a third indirect block (7+1+1+1 | |
49 | * instead of 7+1+1). Also, some previously 8-bit values are | |
50 | * now 16-bit. The inode is now 64 bytes instead of 32. | |
51 | */ | |
52 | struct minix2_inode { | |
53 | __u16 i_mode; | |
54 | __u16 i_nlinks; | |
55 | __u16 i_uid; | |
56 | __u16 i_gid; | |
57 | __u32 i_size; | |
58 | __u32 i_atime; | |
59 | __u32 i_mtime; | |
60 | __u32 i_ctime; | |
61 | __u32 i_zone[10]; | |
62 | }; | |
63 | ||
64 | /* | |
65 | * minix super-block data on disk | |
66 | */ | |
67 | struct minix_super_block { | |
68 | __u16 s_ninodes; | |
69 | __u16 s_nzones; | |
70 | __u16 s_imap_blocks; | |
71 | __u16 s_zmap_blocks; | |
72 | __u16 s_firstdatazone; | |
73 | __u16 s_log_zone_size; | |
74 | __u32 s_max_size; | |
75 | __u16 s_magic; | |
76 | __u16 s_state; | |
77 | __u32 s_zones; | |
78 | }; | |
79 | ||
80 | struct minix_dir_entry { | |
81 | __u16 inode; | |
82 | char name[0]; | |
83 | }; | |
84 | ||
85 | #endif |