Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 */
36struct 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 */
52struct 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 */
67struct 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
80struct minix_dir_entry {
81 __u16 inode;
82 char name[0];
83};
84
85#endif