1#ifndef _LINUX_MINIX_FS_H
2#define _LINUX_MINIX_FS_H
3
4#include <linux/types.h>
5#include <linux/magic.h>
6
7/*
8 * The minix filesystem constants/structures
9 */
10
11/*
12 * Thanks to Kees J Bot for sending me the definitions of the new
13 * minix filesystem (aka V2) with bigger inodes and 32-bit block
14 * pointers.
15 */
16
17#define MINIX_ROOT_INO 1
18
19/* Not the same as the bogus LINK_MAX in <linux/limits.h>. Oh well. */
20#define MINIX_LINK_MAX	250
21#define MINIX2_LINK_MAX	65530
22
23#define MINIX_I_MAP_SLOTS	8
24#define MINIX_Z_MAP_SLOTS	64
25#define MINIX_VALID_FS		0x0001		/* Clean fs. */
26#define MINIX_ERROR_FS		0x0002		/* fs has errors. */
27
28#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_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
78/*
79 * V3 minix super-block data on disk
80 */
81struct minix3_super_block {
82	__u32 s_ninodes;
83	__u16 s_pad0;
84	__u16 s_imap_blocks;
85	__u16 s_zmap_blocks;
86	__u16 s_firstdatazone;
87	__u16 s_log_zone_size;
88	__u16 s_pad1;
89	__u32 s_max_size;
90	__u32 s_zones;
91	__u16 s_magic;
92	__u16 s_pad2;
93	__u16 s_blocksize;
94	__u8  s_disk_version;
95};
96
97struct minix_dir_entry {
98	__u16 inode;
99	char name[0];
100};
101
102struct minix3_dir_entry {
103	__u32 inode;
104	char name[0];
105};
106#endif
107