1 #ifndef _LINUX_MINIX_FS_H 2 #define _LINUX_MINIX_FS_H 3 4 #include <linux/types.h> 5 #include <linux/magic.h> 6 7 /* 8 * The minix filesystem constants/structures 9 */ 10 11 /* 12 * Thanks to Kees J Bot for sending me the definitions of the new 13 * minix filesystem (aka V2) with bigger inodes and 32-bit block 14 * pointers. 15 */ 16 17 #define MINIX_ROOT_INO 1 18 19 /* Not the same as the bogus LINK_MAX in <linux/limits.h>. Oh well. */ 20 #define MINIX_LINK_MAX 250 21 #define MINIX2_LINK_MAX 65530 22 23 #define MINIX_I_MAP_SLOTS 8 24 #define MINIX_Z_MAP_SLOTS 64 25 #define MINIX_VALID_FS 0x0001 /* Clean fs. */ 26 #define MINIX_ERROR_FS 0x0002 /* fs has errors. */ 27 28 #define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode))) 29 30 /* 31 * This is the original minix inode layout on disk. 32 * Note the 8-bit gid and atime and ctime. 33 */ 34 struct minix_inode { 35 __u16 i_mode; 36 __u16 i_uid; 37 __u32 i_size; 38 __u32 i_time; 39 __u8 i_gid; 40 __u8 i_nlinks; 41 __u16 i_zone[9]; 42 }; 43 44 /* 45 * The new minix inode has all the time entries, as well as 46 * long block numbers and a third indirect block (7+1+1+1 47 * instead of 7+1+1). Also, some previously 8-bit values are 48 * now 16-bit. The inode is now 64 bytes instead of 32. 49 */ 50 struct minix2_inode { 51 __u16 i_mode; 52 __u16 i_nlinks; 53 __u16 i_uid; 54 __u16 i_gid; 55 __u32 i_size; 56 __u32 i_atime; 57 __u32 i_mtime; 58 __u32 i_ctime; 59 __u32 i_zone[10]; 60 }; 61 62 /* 63 * minix super-block data on disk 64 */ 65 struct minix_super_block { 66 __u16 s_ninodes; 67 __u16 s_nzones; 68 __u16 s_imap_blocks; 69 __u16 s_zmap_blocks; 70 __u16 s_firstdatazone; 71 __u16 s_log_zone_size; 72 __u32 s_max_size; 73 __u16 s_magic; 74 __u16 s_state; 75 __u32 s_zones; 76 }; 77 78 /* 79 * V3 minix super-block data on disk 80 */ 81 struct minix3_super_block { 82 __u32 s_ninodes; 83 __u16 s_pad0; 84 __u16 s_imap_blocks; 85 __u16 s_zmap_blocks; 86 __u16 s_firstdatazone; 87 __u16 s_log_zone_size; 88 __u16 s_pad1; 89 __u32 s_max_size; 90 __u32 s_zones; 91 __u16 s_magic; 92 __u16 s_pad2; 93 __u16 s_blocksize; 94 __u8 s_disk_version; 95 }; 96 97 struct minix_dir_entry { 98 __u16 inode; 99 char name[0]; 100 }; 101 102 struct minix3_dir_entry { 103 __u32 inode; 104 char name[0]; 105 }; 106 #endif 107