| 1 | #ifndef _LINUX_MINIX_FS_H |
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| 2 | #define _LINUX_MINIX_FS_H |
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| 3 | |
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| 4 | /* |
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| 5 | * The minix filesystem constants/structures |
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| 6 | */ |
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| 7 | |
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| 8 | /* |
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| 9 | * Thanks to Kees J Bot for sending me the definitions of the new |
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| 10 | * minix filesystem (aka V2) with bigger inodes and 32-bit block |
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| 11 | * pointers. |
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| 12 | */ |
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| 13 | |
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| 14 | #include <asm/types.h> |
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| 15 | |
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| 16 | #define MINIX_ROOT_INO 1 |
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| 17 | |
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| 18 | /* Not the same as the bogus LINK_MAX in <linux/limits.h>. Oh well. */ |
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| 19 | #define MINIX_LINK_MAX 250 |
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| 20 | #define MINIX2_LINK_MAX 65530 |
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| 21 | |
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| 22 | #define MINIX_I_MAP_SLOTS 8 |
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| 23 | #define MINIX_Z_MAP_SLOTS 64 |
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| 24 | #define MINIX_SUPER_MAGIC 0x137F /* original minix fs */ |
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| 25 | #define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */ |
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| 26 | #define MINIX2_SUPER_MAGIC 0x2468 /* minix V2 fs */ |
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| 27 | #define MINIX2_SUPER_MAGIC2 0x2478 /* minix V2 fs, 30 char names */ |
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| 28 | #define MINIX_VALID_FS 0x0001 /* Clean fs. */ |
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| 29 | #define MINIX_ERROR_FS 0x0002 /* fs has errors. */ |
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| 30 | |
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| 31 | #define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode))) |
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| 32 | #define MINIX2_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix2_inode))) |
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| 33 | |
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| 34 | /* |
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| 35 | * This is the original minix inode layout on disk. |
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| 36 | * Note the 8-bit gid and atime and ctime. |
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| 37 | */ |
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| 38 | struct minix_inode { |
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| 39 | __u16 i_mode; |
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| 40 | __u16 i_uid; |
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| 41 | __u32 i_size; |
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| 42 | __u32 i_time; |
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| 43 | __u8 i_gid; |
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| 44 | __u8 i_nlinks; |
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| 45 | __u16 i_zone[9]; |
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| 46 | }; |
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| 47 | |
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| 48 | /* |
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| 49 | * The new minix inode has all the time entries, as well as |
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| 50 | * long block numbers and a third indirect block (7+1+1+1 |
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| 51 | * instead of 7+1+1). Also, some previously 8-bit values are |
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| 52 | * now 16-bit. The inode is now 64 bytes instead of 32. |
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| 53 | */ |
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| 54 | struct minix2_inode { |
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| 55 | __u16 i_mode; |
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| 56 | __u16 i_nlinks; |
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| 57 | __u16 i_uid; |
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| 58 | __u16 i_gid; |
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| 59 | __u32 i_size; |
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| 60 | __u32 i_atime; |
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| 61 | __u32 i_mtime; |
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| 62 | __u32 i_ctime; |
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| 63 | __u32 i_zone[10]; |
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| 64 | }; |
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| 65 | |
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| 66 | /* |
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| 67 | * minix super-block data on disk |
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| 68 | */ |
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| 69 | struct minix_super_block { |
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| 70 | __u16 s_ninodes; |
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| 71 | __u16 s_nzones; |
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| 72 | __u16 s_imap_blocks; |
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| 73 | __u16 s_zmap_blocks; |
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| 74 | __u16 s_firstdatazone; |
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| 75 | __u16 s_log_zone_size; |
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| 76 | __u32 s_max_size; |
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| 77 | __u16 s_magic; |
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| 78 | __u16 s_state; |
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| 79 | __u32 s_zones; |
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| 80 | }; |
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| 81 | |
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| 82 | struct minix_dir_entry { |
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| 83 | __u16 inode; |
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| 84 | char name[0]; |
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| 85 | }; |
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| 86 | |
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| 87 | #endif |
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