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1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */2/*3 md_u.h : user <=> kernel API between Linux raidtools and RAID drivers4 Copyright (C) 1998 Ingo Molnar5 6 This program is free software; you can redistribute it and/or modify7 it under the terms of the GNU General Public License as published by8 the Free Software Foundation; either version 2, or (at your option)9 any later version.10*/11 12#ifndef _UAPI_MD_U_H13#define _UAPI_MD_U_H14 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 021#define MD_MINOR_VERSION 9022/*23 * MD_PATCHLEVEL_VERSION indicates kernel functionality.24 * >=1 means different superblock formats are selectable using SET_ARRAY_INFO25 * and major_version/minor_version accordingly26 * >=2 means that Internal bitmaps are supported by setting MD_SB_BITMAP_PRESENT27 * in the super status byte28 * >=3 means that bitmap superblock version 4 is supported, which uses29 * little-ending representation rather than host-endian30 */31#define MD_PATCHLEVEL_VERSION 332 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 666 67typedef struct mdu_version_s {68 int major;69 int minor;70 int patchlevel;71} mdu_version_t;72 73typedef struct mdu_array_info_s {74 /*75 * Generic constant information76 */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 information90 */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 information100 */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/* we need a value for 'no level specified' and 0107 * means 'raid0', so we need something else. This is108 * for internal use only109 */110#define LEVEL_NONE (-1000000)111 112typedef struct mdu_disk_info_s {113 /*114 * configuration/status of one particular disk115 */116 int number;117 int major;118 int minor;119 int raid_disk;120 int state;121 122} mdu_disk_info_t;123 124typedef struct mdu_start_info_s {125 /*126 * configuration/status of one particular disk127 */128 int major;129 int minor;130 int raid_disk;131 int state;132 133} mdu_start_info_t;134 135typedef struct mdu_bitmap_file_s136{137 char pathname[4096];138} mdu_bitmap_file_t;139 140typedef struct mdu_param_s141{142 int personality; /* 1,2,3,4 */143 int chunk_size; /* in bytes */144 int max_fault; /* unused for now */145} mdu_param_t;146 147#endif /* _UAPI_MD_U_H */148