1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2 /* 3 md_u.h : user <=> kernel API between Linux raidtools and RAID drivers 4 Copyright (C) 1998 Ingo Molnar 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 */ 11 12 #ifndef _UAPI_MD_U_H 13 #define _UAPI_MD_U_H 14 15 /* 16 * Different major versions are not compatible. 17 * Different minor versions are only downward compatible. 18 * Different patchlevel versions are downward and upward compatible. 19 */ 20 #define MD_MAJOR_VERSION 0 21 #define MD_MINOR_VERSION 90 22 /* 23 * MD_PATCHLEVEL_VERSION indicates kernel functionality. 24 * >=1 means different superblock formats are selectable using SET_ARRAY_INFO 25 * and major_version/minor_version accordingly 26 * >=2 means that Internal bitmaps are supported by setting MD_SB_BITMAP_PRESENT 27 * in the super status byte 28 * >=3 means that bitmap superblock version 4 is supported, which uses 29 * little-ending representation rather than host-endian 30 */ 31 #define MD_PATCHLEVEL_VERSION 3 32 33 /* ioctls */ 34 35 /* status */ 36 #define RAID_VERSION _IOR (MD_MAJOR, 0x10, mdu_version_t) 37 #define GET_ARRAY_INFO _IOR (MD_MAJOR, 0x11, mdu_array_info_t) 38 #define GET_DISK_INFO _IOR (MD_MAJOR, 0x12, mdu_disk_info_t) 39 #define RAID_AUTORUN _IO (MD_MAJOR, 0x14) 40 #define GET_BITMAP_FILE _IOR (MD_MAJOR, 0x15, mdu_bitmap_file_t) 41 42 /* configuration */ 43 #define CLEAR_ARRAY _IO (MD_MAJOR, 0x20) 44 #define ADD_NEW_DISK _IOW (MD_MAJOR, 0x21, mdu_disk_info_t) 45 #define HOT_REMOVE_DISK _IO (MD_MAJOR, 0x22) 46 #define SET_ARRAY_INFO _IOW (MD_MAJOR, 0x23, mdu_array_info_t) 47 #define SET_DISK_INFO _IO (MD_MAJOR, 0x24) 48 #define WRITE_RAID_INFO _IO (MD_MAJOR, 0x25) 49 #define UNPROTECT_ARRAY _IO (MD_MAJOR, 0x26) 50 #define PROTECT_ARRAY _IO (MD_MAJOR, 0x27) 51 #define HOT_ADD_DISK _IO (MD_MAJOR, 0x28) 52 #define SET_DISK_FAULTY _IO (MD_MAJOR, 0x29) 53 #define HOT_GENERATE_ERROR _IO (MD_MAJOR, 0x2a) 54 #define SET_BITMAP_FILE _IOW (MD_MAJOR, 0x2b, int) 55 56 /* usage */ 57 #define RUN_ARRAY _IOW (MD_MAJOR, 0x30, mdu_param_t) 58 /* 0x31 was START_ARRAY */ 59 #define STOP_ARRAY _IO (MD_MAJOR, 0x32) 60 #define STOP_ARRAY_RO _IO (MD_MAJOR, 0x33) 61 #define RESTART_ARRAY_RW _IO (MD_MAJOR, 0x34) 62 #define CLUSTERED_DISK_NACK _IO (MD_MAJOR, 0x35) 63 64 /* 63 partitions with the alternate major number (mdp) */ 65 #define MdpMinorShift 6 66 67 typedef struct mdu_version_s { 68 int major; 69 int minor; 70 int patchlevel; 71 } mdu_version_t; 72 73 typedef struct mdu_array_info_s { 74 /* 75 * Generic constant information 76 */ 77 int major_version; 78 int minor_version; 79 int patch_version; 80 unsigned int ctime; 81 int level; 82 int size; 83 int nr_disks; 84 int raid_disks; 85 int md_minor; 86 int not_persistent; 87 88 /* 89 * Generic state information 90 */ 91 unsigned int utime; /* 0 Superblock update time */ 92 int state; /* 1 State bits (clean, ...) */ 93 int active_disks; /* 2 Number of currently active disks */ 94 int working_disks; /* 3 Number of working disks */ 95 int failed_disks; /* 4 Number of failed disks */ 96 int spare_disks; /* 5 Number of spare disks */ 97 98 /* 99 * Personality information 100 */ 101 int layout; /* 0 the array's physical layout */ 102 int chunk_size; /* 1 chunk size in bytes */ 103 104 } mdu_array_info_t; 105 106 #define LEVEL_LINEAR (-1) 107 108 /* we need a value for 'no level specified' and 0 109 * means 'raid0', so we need something else. This is 110 * for internal use only 111 */ 112 #define LEVEL_NONE (-1000000) 113 114 typedef struct mdu_disk_info_s { 115 /* 116 * configuration/status of one particular disk 117 */ 118 int number; 119 int major; 120 int minor; 121 int raid_disk; 122 int state; 123 124 } mdu_disk_info_t; 125 126 typedef struct mdu_start_info_s { 127 /* 128 * configuration/status of one particular disk 129 */ 130 int major; 131 int minor; 132 int raid_disk; 133 int state; 134 135 } mdu_start_info_t; 136 137 typedef struct mdu_bitmap_file_s 138 { 139 char pathname[4096]; 140 } mdu_bitmap_file_t; 141 142 typedef struct mdu_param_s 143 { 144 int personality; /* 1,2,3,4 */ 145 int chunk_size; /* in bytes */ 146 int max_fault; /* unused for now */ 147 } mdu_param_t; 148 149 #endif /* _UAPI_MD_U_H */ 150