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