include/uapi/linux/raid/md_u.h

   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 /* we need a value for 'no level specified' and 0
 107  * means 'raid0', so we need something else.  This is
 108  * for internal use only
 109  */
 110 #define LEVEL_NONE              (-1000000)
 111
 112 typedef struct mdu_disk_info_s {
 113         /*
 114          * configuration/status of one particular disk
 115          */
 116         int number;
 117         int major;
 118         int minor;
 119         int raid_disk;
 120         int state;
 121
 122 } mdu_disk_info_t;
 123
 124 typedef struct mdu_start_info_s {
 125         /*
 126          * configuration/status of one particular disk
 127          */
 128         int major;
 129         int minor;
 130         int raid_disk;
 131         int state;
 132
 133 } mdu_start_info_t;
 134
 135 typedef struct mdu_bitmap_file_s
 136 {
 137         char pathname[4096];
 138 } mdu_bitmap_file_t;
 139
 140 typedef struct mdu_param_s
 141 {
 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 */