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 */
34 struct 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 */
50 struct 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 */
65 struct 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 */
81 struct 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
97 struct minix_dir_entry {
98 __u16 inode;
99 char name[0];
100 };
101
102 struct minix3_dir_entry {
103 __u32 inode;
104 char name[0];
105 };
106 #endif
107
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