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 #define CLUSTERED_DISK_NACK _IO (MD_MAJOR, 0x35) 66 67 /* 63 partitions with the alternate major number (mdp) */ 68 #define MdpMinorShift 6 69 70 typedef struct mdu_version_s { 71 int major; 72 int minor; 73 int patchlevel; 74 } mdu_version_t; 75 76 typedef struct mdu_array_info_s { 77 /* 78 * Generic constant information 79 */ 80 int major_version; 81 int minor_version; 82 int patch_version; 83 unsigned int ctime; 84 int level; 85 int size; 86 int nr_disks; 87 int raid_disks; 88 int md_minor; 89 int not_persistent; 90 91 /* 92 * Generic state information 93 */ 94 unsigned int utime; /* 0 Superblock update time */ 95 int state; /* 1 State bits (clean, ...) */ 96 int active_disks; /* 2 Number of currently active disks */ 97 int working_disks; /* 3 Number of working disks */ 98 int failed_disks; /* 4 Number of failed disks */ 99 int spare_disks; /* 5 Number of spare disks */ 100 101 /* 102 * Personality information 103 */ 104 int layout; /* 0 the array's physical layout */ 105 int chunk_size; /* 1 chunk size in bytes */ 106 107 } mdu_array_info_t; 108 109 /* non-obvious values for 'level' */ 110 #define LEVEL_MULTIPATH (-4) 111 #define LEVEL_LINEAR (-1) 112 #define LEVEL_FAULTY (-5) 113 114 /* we need a value for 'no level specified' and 0 115 * means 'raid0', so we need something else. This is 116 * for internal use only 117 */ 118 #define LEVEL_NONE (-1000000) 119 120 typedef struct mdu_disk_info_s { 121 /* 122 * configuration/status of one particular disk 123 */ 124 int number; 125 int major; 126 int minor; 127 int raid_disk; 128 int state; 129 130 } mdu_disk_info_t; 131 132 typedef struct mdu_start_info_s { 133 /* 134 * configuration/status of one particular disk 135 */ 136 int major; 137 int minor; 138 int raid_disk; 139 int state; 140 141 } mdu_start_info_t; 142 143 typedef struct mdu_bitmap_file_s 144 { 145 char pathname[4096]; 146 } mdu_bitmap_file_t; 147 148 typedef struct mdu_param_s 149 { 150 int personality; /* 1,2,3,4 */ 151 int chunk_size; /* in bytes */ 152 int max_fault; /* unused for now */ 153 } mdu_param_t; 154 155 #endif /* _UAPI_MD_U_H */ 156
