1 #ifndef _LINUX_MINIX_FS_H 2 #define _LINUX_MINIX_FS_H 3 4 #include <linux/magic.h> 5 6 /* 7 * The minix filesystem constants/structures 8 */ 9 10 /* 11 * Thanks to Kees J Bot for sending me the definitions of the new 12 * minix filesystem (aka V2) with bigger inodes and 32-bit block 13 * pointers. 14 */ 15 16 #define MINIX_ROOT_INO 1 17 18 /* Not the same as the bogus LINK_MAX in <linux/limits.h>. Oh well. */ 19 #define MINIX_LINK_MAX 250 20 #define MINIX2_LINK_MAX 65530 21 22 #define MINIX_I_MAP_SLOTS 8 23 #define MINIX_Z_MAP_SLOTS 64 24 #define MINIX_VALID_FS 0x0001 /* Clean fs. */ 25 #define MINIX_ERROR_FS 0x0002 /* fs has errors. */ 26 27 #define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode))) 28 29 /* 30 * This is the original minix inode layout on disk. 31 * Note the 8-bit gid and atime and ctime. 32 */ 33 struct minix_inode { 34 __u16 i_mode; 35 __u16 i_uid; 36 __u32 i_size; 37 __u32 i_time; 38 __u8 i_gid; 39 __u8 i_nlinks; 40 __u16 i_zone[9]; 41 }; 42 43 /* 44 * The new minix inode has all the time entries, as well as 45 * long block numbers and a third indirect block (7+1+1+1 46 * instead of 7+1+1). Also, some previously 8-bit values are 47 * now 16-bit. The inode is now 64 bytes instead of 32. 48 */ 49 struct minix2_inode { 50 __u16 i_mode; 51 __u16 i_nlinks; 52 __u16 i_uid; 53 __u16 i_gid; 54 __u32 i_size; 55 __u32 i_atime; 56 __u32 i_mtime; 57 __u32 i_ctime; 58 __u32 i_zone[10]; 59 }; 60 61 /* 62 * minix super-block data on disk 63 */ 64 struct minix_super_block { 65 __u16 s_ninodes; 66 __u16 s_nzones; 67 __u16 s_imap_blocks; 68 __u16 s_zmap_blocks; 69 __u16 s_firstdatazone; 70 __u16 s_log_zone_size; 71 __u32 s_max_size; 72 __u16 s_magic; 73 __u16 s_state; 74 __u32 s_zones; 75 }; 76 77 /* 78 * V3 minix super-block data on disk 79 */ 80 struct minix3_super_block { 81 __u32 s_ninodes; 82 __u16 s_pad0; 83 __u16 s_imap_blocks; 84 __u16 s_zmap_blocks; 85 __u16 s_firstdatazone; 86 __u16 s_log_zone_size; 87 __u16 s_pad1; 88 __u32 s_max_size; 89 __u32 s_zones; 90 __u16 s_magic; 91 __u16 s_pad2; 92 __u16 s_blocksize; 93 __u8 s_disk_version; 94 }; 95 96 struct minix_dir_entry { 97 __u16 inode; 98 char name[0]; 99 }; 100 101 struct minix3_dir_entry { 102 __u32 inode; 103 char name[0]; 104 }; 105 #endif 106