Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
NeilBrown | 9202295 | 2009-03-31 14:33:13 +1100 | [diff] [blame^] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) |
NeilBrown | 32a7627 | 2005-06-21 17:17:14 -0700 | [diff] [blame] | 44 | #define GET_BITMAP_FILE _IOR (MD_MAJOR, 0x15, mdu_bitmap_file_t) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) |
NeilBrown | 32a7627 | 2005-06-21 17:17:14 -0700 | [diff] [blame] | 58 | #define SET_BITMAP_FILE _IOW (MD_MAJOR, 0x2b, int) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
| 60 | /* usage */ |
| 61 | #define RUN_ARRAY _IOW (MD_MAJOR, 0x30, mdu_param_t) |
Adrian Bunk | fbedac0 | 2006-10-03 01:15:44 -0700 | [diff] [blame] | 62 | /* 0x31 was START_ARRAY */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
NeilBrown | 8b2b5c2 | 2009-03-31 14:27:03 +1100 | [diff] [blame] | 67 | /* 63 partitions with the alternate major number (mdp) */ |
| 68 | #define MdpMinorShift 6 |
| 69 | #ifdef __KERNEL__ |
| 70 | extern int mdp_major; |
| 71 | #endif |
| 72 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | typedef struct mdu_version_s { |
| 74 | int major; |
| 75 | int minor; |
| 76 | int patchlevel; |
| 77 | } mdu_version_t; |
| 78 | |
| 79 | typedef 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 | |
NeilBrown | 8b2b5c2 | 2009-03-31 14:27:03 +1100 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | typedef 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 | |
| 135 | typedef 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 | |
NeilBrown | 32a7627 | 2005-06-21 17:17:14 -0700 | [diff] [blame] | 146 | typedef struct mdu_bitmap_file_s |
| 147 | { |
| 148 | char pathname[4096]; |
| 149 | } mdu_bitmap_file_t; |
| 150 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | typedef 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 | |