16f52b16cSGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2607ca46eSDavid Howells #ifndef _LINUX_MINIX_FS_H 3607ca46eSDavid Howells #define _LINUX_MINIX_FS_H 4607ca46eSDavid Howells 5607ca46eSDavid Howells #include <linux/types.h> 6607ca46eSDavid Howells #include <linux/magic.h> 7607ca46eSDavid Howells 8607ca46eSDavid Howells /* 9607ca46eSDavid Howells * The minix filesystem constants/structures 10607ca46eSDavid Howells */ 11607ca46eSDavid Howells 12607ca46eSDavid Howells /* 13607ca46eSDavid Howells * Thanks to Kees J Bot for sending me the definitions of the new 14607ca46eSDavid Howells * minix filesystem (aka V2) with bigger inodes and 32-bit block 15607ca46eSDavid Howells * pointers. 16607ca46eSDavid Howells */ 17607ca46eSDavid Howells 18607ca46eSDavid Howells #define MINIX_ROOT_INO 1 19607ca46eSDavid Howells 20607ca46eSDavid Howells /* Not the same as the bogus LINK_MAX in <linux/limits.h>. Oh well. */ 21607ca46eSDavid Howells #define MINIX_LINK_MAX 250 22607ca46eSDavid Howells #define MINIX2_LINK_MAX 65530 23607ca46eSDavid Howells 24607ca46eSDavid Howells #define MINIX_I_MAP_SLOTS 8 25607ca46eSDavid Howells #define MINIX_Z_MAP_SLOTS 64 26607ca46eSDavid Howells #define MINIX_VALID_FS 0x0001 /* Clean fs. */ 27607ca46eSDavid Howells #define MINIX_ERROR_FS 0x0002 /* fs has errors. */ 28607ca46eSDavid Howells 29607ca46eSDavid Howells #define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode))) 30607ca46eSDavid Howells 31607ca46eSDavid Howells /* 32607ca46eSDavid Howells * This is the original minix inode layout on disk. 33607ca46eSDavid Howells * Note the 8-bit gid and atime and ctime. 34607ca46eSDavid Howells */ 35607ca46eSDavid Howells struct minix_inode { 36607ca46eSDavid Howells __u16 i_mode; 37607ca46eSDavid Howells __u16 i_uid; 38607ca46eSDavid Howells __u32 i_size; 39607ca46eSDavid Howells __u32 i_time; 40607ca46eSDavid Howells __u8 i_gid; 41607ca46eSDavid Howells __u8 i_nlinks; 42607ca46eSDavid Howells __u16 i_zone[9]; 43607ca46eSDavid Howells }; 44607ca46eSDavid Howells 45607ca46eSDavid Howells /* 46607ca46eSDavid Howells * The new minix inode has all the time entries, as well as 47607ca46eSDavid Howells * long block numbers and a third indirect block (7+1+1+1 48607ca46eSDavid Howells * instead of 7+1+1). Also, some previously 8-bit values are 49607ca46eSDavid Howells * now 16-bit. The inode is now 64 bytes instead of 32. 50607ca46eSDavid Howells */ 51607ca46eSDavid Howells struct minix2_inode { 52607ca46eSDavid Howells __u16 i_mode; 53607ca46eSDavid Howells __u16 i_nlinks; 54607ca46eSDavid Howells __u16 i_uid; 55607ca46eSDavid Howells __u16 i_gid; 56607ca46eSDavid Howells __u32 i_size; 57607ca46eSDavid Howells __u32 i_atime; 58607ca46eSDavid Howells __u32 i_mtime; 59607ca46eSDavid Howells __u32 i_ctime; 60607ca46eSDavid Howells __u32 i_zone[10]; 61607ca46eSDavid Howells }; 62607ca46eSDavid Howells 63607ca46eSDavid Howells /* 64607ca46eSDavid Howells * minix super-block data on disk 65607ca46eSDavid Howells */ 66607ca46eSDavid Howells struct minix_super_block { 67607ca46eSDavid Howells __u16 s_ninodes; 68607ca46eSDavid Howells __u16 s_nzones; 69607ca46eSDavid Howells __u16 s_imap_blocks; 70607ca46eSDavid Howells __u16 s_zmap_blocks; 71607ca46eSDavid Howells __u16 s_firstdatazone; 72607ca46eSDavid Howells __u16 s_log_zone_size; 73607ca46eSDavid Howells __u32 s_max_size; 74607ca46eSDavid Howells __u16 s_magic; 75607ca46eSDavid Howells __u16 s_state; 76607ca46eSDavid Howells __u32 s_zones; 77607ca46eSDavid Howells }; 78607ca46eSDavid Howells 79607ca46eSDavid Howells /* 80607ca46eSDavid Howells * V3 minix super-block data on disk 81607ca46eSDavid Howells */ 82607ca46eSDavid Howells struct minix3_super_block { 83607ca46eSDavid Howells __u32 s_ninodes; 84607ca46eSDavid Howells __u16 s_pad0; 85607ca46eSDavid Howells __u16 s_imap_blocks; 86607ca46eSDavid Howells __u16 s_zmap_blocks; 87607ca46eSDavid Howells __u16 s_firstdatazone; 88607ca46eSDavid Howells __u16 s_log_zone_size; 89607ca46eSDavid Howells __u16 s_pad1; 90607ca46eSDavid Howells __u32 s_max_size; 91607ca46eSDavid Howells __u32 s_zones; 92607ca46eSDavid Howells __u16 s_magic; 93607ca46eSDavid Howells __u16 s_pad2; 94607ca46eSDavid Howells __u16 s_blocksize; 95607ca46eSDavid Howells __u8 s_disk_version; 96607ca46eSDavid Howells }; 97607ca46eSDavid Howells 98607ca46eSDavid Howells struct minix_dir_entry { 99607ca46eSDavid Howells __u16 inode; 100*94dfc73eSGustavo A. R. Silva char name[]; 101607ca46eSDavid Howells }; 102607ca46eSDavid Howells 103607ca46eSDavid Howells struct minix3_dir_entry { 104607ca46eSDavid Howells __u32 inode; 105*94dfc73eSGustavo A. R. Silva char name[]; 106607ca46eSDavid Howells }; 107607ca46eSDavid Howells #endif 108