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