The C and C++ Include Header Files

/usr/include/linux/raid/md_u.h


$ cat -n /usr/include/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 _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	/* 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 /* _MD_U_H */