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md_u.h (4174B) - Raw

      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 _MD_U_H
     13 #define _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 /* _MD_U_H */