1/* 2 md_u.h : user <=> kernel API between Linux raidtools and RAID drivers 3 Copyright (C) 1998 Ingo Molnar 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 2, or (at your option) 8 any later version. 9 10 You should have received a copy of the GNU General Public License 11 (for example /usr/src/linux/COPYING); if not, write to the Free 12 Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 13*/ 14 15#ifndef _MD_U_H 16#define _MD_U_H 17 18/* 19 * Different major versions are not compatible. 20 * Different minor versions are only downward compatible. 21 * Different patchlevel versions are downward and upward compatible. 22 */ 23#define MD_MAJOR_VERSION 0 24#define MD_MINOR_VERSION 90 25/* 26 * MD_PATCHLEVEL_VERSION indicates kernel functionality. 27 * >=1 means different superblock formats are selectable using SET_ARRAY_INFO 28 * and major_version/minor_version accordingly 29 * >=2 means that Internal bitmaps are supported by setting MD_SB_BITMAP_PRESENT 30 * in the super status byte 31 * >=3 means that bitmap superblock version 4 is supported, which uses 32 * little-ending representation rather than host-endian 33 */ 34#define MD_PATCHLEVEL_VERSION 3 35 36/* ioctls */ 37 38/* status */ 39#define RAID_VERSION _IOR (MD_MAJOR, 0x10, mdu_version_t) 40#define GET_ARRAY_INFO _IOR (MD_MAJOR, 0x11, mdu_array_info_t) 41#define GET_DISK_INFO _IOR (MD_MAJOR, 0x12, mdu_disk_info_t) 42#define PRINT_RAID_DEBUG _IO (MD_MAJOR, 0x13) 43#define RAID_AUTORUN _IO (MD_MAJOR, 0x14) 44#define GET_BITMAP_FILE _IOR (MD_MAJOR, 0x15, mdu_bitmap_file_t) 45 46/* configuration */ 47#define CLEAR_ARRAY _IO (MD_MAJOR, 0x20) 48#define ADD_NEW_DISK _IOW (MD_MAJOR, 0x21, mdu_disk_info_t) 49#define HOT_REMOVE_DISK _IO (MD_MAJOR, 0x22) 50#define SET_ARRAY_INFO _IOW (MD_MAJOR, 0x23, mdu_array_info_t) 51#define SET_DISK_INFO _IO (MD_MAJOR, 0x24) 52#define WRITE_RAID_INFO _IO (MD_MAJOR, 0x25) 53#define UNPROTECT_ARRAY _IO (MD_MAJOR, 0x26) 54#define PROTECT_ARRAY _IO (MD_MAJOR, 0x27) 55#define HOT_ADD_DISK _IO (MD_MAJOR, 0x28) 56#define SET_DISK_FAULTY _IO (MD_MAJOR, 0x29) 57#define HOT_GENERATE_ERROR _IO (MD_MAJOR, 0x2a) 58#define SET_BITMAP_FILE _IOW (MD_MAJOR, 0x2b, int) 59 60/* usage */ 61#define RUN_ARRAY _IOW (MD_MAJOR, 0x30, mdu_param_t) 62/* 0x31 was START_ARRAY */ 63#define STOP_ARRAY _IO (MD_MAJOR, 0x32) 64#define STOP_ARRAY_RO _IO (MD_MAJOR, 0x33) 65#define RESTART_ARRAY_RW _IO (MD_MAJOR, 0x34) 66 67/* 63 partitions with the alternate major number (mdp) */ 68#define MdpMinorShift 6 69#ifdef __KERNEL__ 70extern int mdp_major; 71#endif 72 73typedef struct mdu_version_s { 74 int major; 75 int minor; 76 int patchlevel; 77} mdu_version_t; 78 79typedef struct mdu_array_info_s { 80 /* 81 * Generic constant information 82 */ 83 int major_version; 84 int minor_version; 85 int patch_version; 86 int ctime; 87 int level; 88 int size; 89 int nr_disks; 90 int raid_disks; 91 int md_minor; 92 int not_persistent; 93 94 /* 95 * Generic state information 96 */ 97 int utime; /* 0 Superblock update time */ 98 int state; /* 1 State bits (clean, ...) */ 99 int active_disks; /* 2 Number of currently active disks */ 100 int working_disks; /* 3 Number of working disks */ 101 int failed_disks; /* 4 Number of failed disks */ 102 int spare_disks; /* 5 Number of spare disks */ 103 104 /* 105 * Personality information 106 */ 107 int layout; /* 0 the array's physical layout */ 108 int chunk_size; /* 1 chunk size in bytes */ 109 110} mdu_array_info_t; 111 112/* non-obvious values for 'level' */ 113#define LEVEL_MULTIPATH (-4) 114#define LEVEL_LINEAR (-1) 115#define LEVEL_FAULTY (-5) 116 117/* we need a value for 'no level specified' and 0 118 * means 'raid0', so we need something else. This is 119 * for internal use only 120 */ 121#define LEVEL_NONE (-1000000) 122 123typedef struct mdu_disk_info_s { 124 /* 125 * configuration/status of one particular disk 126 */ 127 int number; 128 int major; 129 int minor; 130 int raid_disk; 131 int state; 132 133} mdu_disk_info_t; 134 135typedef struct mdu_start_info_s { 136 /* 137 * configuration/status of one particular disk 138 */ 139 int major; 140 int minor; 141 int raid_disk; 142 int state; 143 144} mdu_start_info_t; 145 146typedef struct mdu_bitmap_file_s 147{ 148 char pathname[4096]; 149} mdu_bitmap_file_t; 150 151typedef struct mdu_param_s 152{ 153 int personality; /* 1,2,3,4 */ 154 int chunk_size; /* in bytes */ 155 int max_fault; /* unused for now */ 156} mdu_param_t; 157 158#endif 159