1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
2 | #ifndef _LINUX_MINIX_FS_H |
3 | #define _LINUX_MINIX_FS_H |
4 | |
5 | #include <linux/types.h> |
6 | #include <linux/magic.h> |
7 | |
8 | /* |
9 | * The minix filesystem constants/structures |
10 | */ |
11 | |
12 | /* |
13 | * Thanks to Kees J Bot for sending me the definitions of the new |
14 | * minix filesystem (aka V2) with bigger inodes and 32-bit block |
15 | * pointers. |
16 | */ |
17 | |
18 | #define MINIX_ROOT_INO 1 |
19 | |
20 | /* Not the same as the bogus LINK_MAX in <linux/limits.h>. Oh well. */ |
21 | #define MINIX_LINK_MAX 250 |
22 | #define MINIX2_LINK_MAX 65530 |
23 | |
24 | #define MINIX_I_MAP_SLOTS 8 |
25 | #define MINIX_Z_MAP_SLOTS 64 |
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 | |
31 | /* |
32 | * This is the original minix inode layout on disk. |
33 | * Note the 8-bit gid and atime and ctime. |
34 | */ |
35 | struct minix_inode { |
36 | __u16 i_mode; |
37 | __u16 i_uid; |
38 | __u32 i_size; |
39 | __u32 i_time; |
40 | __u8 i_gid; |
41 | __u8 i_nlinks; |
42 | __u16 i_zone[9]; |
43 | }; |
44 | |
45 | /* |
46 | * The new minix inode has all the time entries, as well as |
47 | * long block numbers and a third indirect block (7+1+1+1 |
48 | * instead of 7+1+1). Also, some previously 8-bit values are |
49 | * now 16-bit. The inode is now 64 bytes instead of 32. |
50 | */ |
51 | struct minix2_inode { |
52 | __u16 i_mode; |
53 | __u16 i_nlinks; |
54 | __u16 i_uid; |
55 | __u16 i_gid; |
56 | __u32 i_size; |
57 | __u32 i_atime; |
58 | __u32 i_mtime; |
59 | __u32 i_ctime; |
60 | __u32 i_zone[10]; |
61 | }; |
62 | |
63 | /* |
64 | * minix super-block data on disk |
65 | */ |
66 | struct minix_super_block { |
67 | __u16 s_ninodes; |
68 | __u16 s_nzones; |
69 | __u16 s_imap_blocks; |
70 | __u16 s_zmap_blocks; |
71 | __u16 s_firstdatazone; |
72 | __u16 s_log_zone_size; |
73 | __u32 s_max_size; |
74 | __u16 s_magic; |
75 | __u16 s_state; |
76 | __u32 s_zones; |
77 | }; |
78 | |
79 | /* |
80 | * V3 minix super-block data on disk |
81 | */ |
82 | struct minix3_super_block { |
83 | __u32 s_ninodes; |
84 | __u16 s_pad0; |
85 | __u16 s_imap_blocks; |
86 | __u16 s_zmap_blocks; |
87 | __u16 s_firstdatazone; |
88 | __u16 s_log_zone_size; |
89 | __u16 s_pad1; |
90 | __u32 s_max_size; |
91 | __u32 s_zones; |
92 | __u16 s_magic; |
93 | __u16 s_pad2; |
94 | __u16 s_blocksize; |
95 | __u8 s_disk_version; |
96 | }; |
97 | |
98 | struct minix_dir_entry { |
99 | __u16 inode; |
100 | char name[]; |
101 | }; |
102 | |
103 | struct minix3_dir_entry { |
104 | __u32 inode; |
105 | char name[]; |
106 | }; |
107 | #endif |
108 | |