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6f52b16c | 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
1da177e4 LT |
2 | #ifndef _LINUX_MINIX_FS_H |
3 | #define _LINUX_MINIX_FS_H | |
4 | ||
4b7ae342 | 5 | #include <linux/types.h> |
e18fa700 JG |
6 | #include <linux/magic.h> |
7 | ||
1da177e4 LT |
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 | |
1da177e4 LT |
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))) | |
1da177e4 LT |
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 | ||
939b00df AB |
79 | /* |
80 | * V3 minix super-block data on disk | |
81 | */ | |
82 | struct minix3_super_block { | |
f4fa27c1 | 83 | __u32 s_ninodes; |
939b00df AB |
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 | ||
1da177e4 LT |
98 | struct minix_dir_entry { |
99 | __u16 inode; | |
94dfc73e | 100 | char name[]; |
1da177e4 LT |
101 | }; |
102 | ||
939b00df AB |
103 | struct minix3_dir_entry { |
104 | __u32 inode; | |
94dfc73e | 105 | char name[]; |
939b00df | 106 | }; |
1da177e4 | 107 | #endif |