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 _UAPI_MD_U_H 16 #define _UAPI_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 RAID_AUTORUN _IO (MD_MAJOR, 0x14) 43 #define GET_BITMAP_FILE _IOR (MD_MAJOR, 0x15, mdu_bitmap_file_t) 44 45 /* configuration */ 46 #define CLEAR_ARRAY _IO (MD_MAJOR, 0x20) 47 #define ADD_NEW_DISK _IOW (MD_MAJOR, 0x21, mdu_disk_info_t) 48 #define HOT_REMOVE_DISK _IO (MD_MAJOR, 0x22) 49 #define SET_ARRAY_INFO _IOW (MD_MAJOR, 0x23, mdu_array_info_t) 50 #define SET_DISK_INFO _IO (MD_MAJOR, 0x24) 51 #define WRITE_RAID_INFO _IO (MD_MAJOR, 0x25) 52 #define UNPROTECT_ARRAY _IO (MD_MAJOR, 0x26) 53 #define PROTECT_ARRAY _IO (MD_MAJOR, 0x27) 54 #define HOT_ADD_DISK _IO (MD_MAJOR, 0x28) 55 #define SET_DISK_FAULTY _IO (MD_MAJOR, 0x29) 56 #define HOT_GENERATE_ERROR _IO (MD_MAJOR, 0x2a) 57 #define SET_BITMAP_FILE _IOW (MD_MAJOR, 0x2b, int) 58 59 /* usage */ 60 #define RUN_ARRAY _IOW (MD_MAJOR, 0x30, mdu_param_t) 61 /* 0x31 was START_ARRAY */ 62 #define STOP_ARRAY _IO (MD_MAJOR, 0x32) 63 #define STOP_ARRAY_RO _IO (MD_MAJOR, 0x33) 64 #define RESTART_ARRAY_RW _IO (MD_MAJOR, 0x34) 65 66 /* 63 partitions with the alternate major number (mdp) */ 67 #define MdpMinorShift 6 68 69 typedef struct mdu_version_s { 70 int major; 71 int minor; 72 int patchlevel; 73 } mdu_version_t; 74 75 typedef struct mdu_array_info_s { 76 /* 77 * Generic constant information 78 */ 79 int major_version; 80 int minor_version; 81 int patch_version; 82 int ctime; 83 int level; 84 int size; 85 int nr_disks; 86 int raid_disks; 87 int md_minor; 88 int not_persistent; 89 90 /* 91 * Generic state information 92 */ 93 int utime; /* 0 Superblock update time */ 94 int state; /* 1 State bits (clean, ...) */ 95 int active_disks; /* 2 Number of currently active disks */ 96 int working_disks; /* 3 Number of working disks */ 97 int failed_disks; /* 4 Number of failed disks */ 98 int spare_disks; /* 5 Number of spare disks */ 99 100 /* 101 * Personality information 102 */ 103 int layout; /* 0 the array's physical layout */ 104 int chunk_size; /* 1 chunk size in bytes */ 105 106 } mdu_array_info_t; 107 108 /* non-obvious values for 'level' */ 109 #define LEVEL_MULTIPATH (-4) 110 #define LEVEL_LINEAR (-1) 111 #define LEVEL_FAULTY (-5) 112 113 /* we need a value for 'no level specified' and 0 114 * means 'raid0', so we need something else. This is 115 * for internal use only 116 */ 117 #define LEVEL_NONE (-1000000) 118 119 typedef struct mdu_disk_info_s { 120 /* 121 * configuration/status of one particular disk 122 */ 123 int number; 124 int major; 125 int minor; 126 int raid_disk; 127 int state; 128 129 } mdu_disk_info_t; 130 131 typedef struct mdu_start_info_s { 132 /* 133 * configuration/status of one particular disk 134 */ 135 int major; 136 int minor; 137 int raid_disk; 138 int state; 139 140 } mdu_start_info_t; 141 142 typedef struct mdu_bitmap_file_s 143 { 144 char pathname[4096]; 145 } mdu_bitmap_file_t; 146 147 typedef struct mdu_param_s 148 { 149 int personality; /* 1,2,3,4 */ 150 int chunk_size; /* in bytes */ 151 int max_fault; /* unused for now */ 152 } mdu_param_t; 153 154 #endif /* _UAPI_MD_U_H */ 155