1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2*4882a593Smuzhiyun #ifndef _LINUX_MINIX_FS_H 3*4882a593Smuzhiyun #define _LINUX_MINIX_FS_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <linux/types.h> 6*4882a593Smuzhiyun #include <linux/magic.h> 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun /* 9*4882a593Smuzhiyun * The minix filesystem constants/structures 10*4882a593Smuzhiyun */ 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun /* 13*4882a593Smuzhiyun * Thanks to Kees J Bot for sending me the definitions of the new 14*4882a593Smuzhiyun * minix filesystem (aka V2) with bigger inodes and 32-bit block 15*4882a593Smuzhiyun * pointers. 16*4882a593Smuzhiyun */ 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun #define MINIX_ROOT_INO 1 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun /* Not the same as the bogus LINK_MAX in <linux/limits.h>. Oh well. */ 21*4882a593Smuzhiyun #define MINIX_LINK_MAX 250 22*4882a593Smuzhiyun #define MINIX2_LINK_MAX 65530 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun #define MINIX_I_MAP_SLOTS 8 25*4882a593Smuzhiyun #define MINIX_Z_MAP_SLOTS 64 26*4882a593Smuzhiyun #define MINIX_VALID_FS 0x0001 /* Clean fs. */ 27*4882a593Smuzhiyun #define MINIX_ERROR_FS 0x0002 /* fs has errors. */ 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun #define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode))) 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun /* 32*4882a593Smuzhiyun * This is the original minix inode layout on disk. 33*4882a593Smuzhiyun * Note the 8-bit gid and atime and ctime. 34*4882a593Smuzhiyun */ 35*4882a593Smuzhiyun struct minix_inode { 36*4882a593Smuzhiyun __u16 i_mode; 37*4882a593Smuzhiyun __u16 i_uid; 38*4882a593Smuzhiyun __u32 i_size; 39*4882a593Smuzhiyun __u32 i_time; 40*4882a593Smuzhiyun __u8 i_gid; 41*4882a593Smuzhiyun __u8 i_nlinks; 42*4882a593Smuzhiyun __u16 i_zone[9]; 43*4882a593Smuzhiyun }; 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun /* 46*4882a593Smuzhiyun * The new minix inode has all the time entries, as well as 47*4882a593Smuzhiyun * long block numbers and a third indirect block (7+1+1+1 48*4882a593Smuzhiyun * instead of 7+1+1). Also, some previously 8-bit values are 49*4882a593Smuzhiyun * now 16-bit. The inode is now 64 bytes instead of 32. 50*4882a593Smuzhiyun */ 51*4882a593Smuzhiyun struct minix2_inode { 52*4882a593Smuzhiyun __u16 i_mode; 53*4882a593Smuzhiyun __u16 i_nlinks; 54*4882a593Smuzhiyun __u16 i_uid; 55*4882a593Smuzhiyun __u16 i_gid; 56*4882a593Smuzhiyun __u32 i_size; 57*4882a593Smuzhiyun __u32 i_atime; 58*4882a593Smuzhiyun __u32 i_mtime; 59*4882a593Smuzhiyun __u32 i_ctime; 60*4882a593Smuzhiyun __u32 i_zone[10]; 61*4882a593Smuzhiyun }; 62*4882a593Smuzhiyun 63*4882a593Smuzhiyun /* 64*4882a593Smuzhiyun * minix super-block data on disk 65*4882a593Smuzhiyun */ 66*4882a593Smuzhiyun struct minix_super_block { 67*4882a593Smuzhiyun __u16 s_ninodes; 68*4882a593Smuzhiyun __u16 s_nzones; 69*4882a593Smuzhiyun __u16 s_imap_blocks; 70*4882a593Smuzhiyun __u16 s_zmap_blocks; 71*4882a593Smuzhiyun __u16 s_firstdatazone; 72*4882a593Smuzhiyun __u16 s_log_zone_size; 73*4882a593Smuzhiyun __u32 s_max_size; 74*4882a593Smuzhiyun __u16 s_magic; 75*4882a593Smuzhiyun __u16 s_state; 76*4882a593Smuzhiyun __u32 s_zones; 77*4882a593Smuzhiyun }; 78*4882a593Smuzhiyun 79*4882a593Smuzhiyun /* 80*4882a593Smuzhiyun * V3 minix super-block data on disk 81*4882a593Smuzhiyun */ 82*4882a593Smuzhiyun struct minix3_super_block { 83*4882a593Smuzhiyun __u32 s_ninodes; 84*4882a593Smuzhiyun __u16 s_pad0; 85*4882a593Smuzhiyun __u16 s_imap_blocks; 86*4882a593Smuzhiyun __u16 s_zmap_blocks; 87*4882a593Smuzhiyun __u16 s_firstdatazone; 88*4882a593Smuzhiyun __u16 s_log_zone_size; 89*4882a593Smuzhiyun __u16 s_pad1; 90*4882a593Smuzhiyun __u32 s_max_size; 91*4882a593Smuzhiyun __u32 s_zones; 92*4882a593Smuzhiyun __u16 s_magic; 93*4882a593Smuzhiyun __u16 s_pad2; 94*4882a593Smuzhiyun __u16 s_blocksize; 95*4882a593Smuzhiyun __u8 s_disk_version; 96*4882a593Smuzhiyun }; 97*4882a593Smuzhiyun 98*4882a593Smuzhiyun struct minix_dir_entry { 99*4882a593Smuzhiyun __u16 inode; 100*4882a593Smuzhiyun char name[0]; 101*4882a593Smuzhiyun }; 102*4882a593Smuzhiyun 103*4882a593Smuzhiyun struct minix3_dir_entry { 104*4882a593Smuzhiyun __u32 inode; 105*4882a593Smuzhiyun char name[0]; 106*4882a593Smuzhiyun }; 107*4882a593Smuzhiyun #endif 108