2 md_u.h : user <=> kernel API between Linux raidtools and RAID drivers
3 Copyright (C) 1998 Ingo Molnar
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
10 You should have received a copy of the GNU General Public License
11 (for example /usr/src/linux/COPYING); if not, write to the Free
12 Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 * Different major versions are not compatible.
20 * Different minor versions are only downward compatible.
21 * Different patchlevel versions are downward and upward compatible.
23 #define MD_MAJOR_VERSION 0
24 #define MD_MINOR_VERSION 90
26 * MD_PATCHLEVEL_VERSION indicates kernel functionality.
27 * >=1 means different superblock formats are selectable using SET_ARRAY_INFO
28 * and major_version/minor_version accordingly
29 * >=2 means that Internal bitmaps are supported by setting MD_SB_BITMAP_PRESENT
30 * in the super status byte
31 * >=3 means that bitmap superblock version 4 is supported, which uses
32 * little-ending representation rather than host-endian
34 #define MD_PATCHLEVEL_VERSION 3
39 #define RAID_VERSION _IOR (MD_MAJOR, 0x10, mdu_version_t)
40 #define GET_ARRAY_INFO _IOR (MD_MAJOR, 0x11, mdu_array_info_t)
41 #define GET_DISK_INFO _IOR (MD_MAJOR, 0x12, mdu_disk_info_t)
42 #define PRINT_RAID_DEBUG _IO (MD_MAJOR, 0x13)
43 #define RAID_AUTORUN _IO (MD_MAJOR, 0x14)
44 #define GET_BITMAP_FILE _IOR (MD_MAJOR, 0x15, mdu_bitmap_file_t)
47 #define CLEAR_ARRAY _IO (MD_MAJOR, 0x20)
48 #define ADD_NEW_DISK _IOW (MD_MAJOR, 0x21, mdu_disk_info_t)
49 #define HOT_REMOVE_DISK _IO (MD_MAJOR, 0x22)
50 #define SET_ARRAY_INFO _IOW (MD_MAJOR, 0x23, mdu_array_info_t)
51 #define SET_DISK_INFO _IO (MD_MAJOR, 0x24)
52 #define WRITE_RAID_INFO _IO (MD_MAJOR, 0x25)
53 #define UNPROTECT_ARRAY _IO (MD_MAJOR, 0x26)
54 #define PROTECT_ARRAY _IO (MD_MAJOR, 0x27)
55 #define HOT_ADD_DISK _IO (MD_MAJOR, 0x28)
56 #define SET_DISK_FAULTY _IO (MD_MAJOR, 0x29)
57 #define HOT_GENERATE_ERROR _IO (MD_MAJOR, 0x2a)
58 #define SET_BITMAP_FILE _IOW (MD_MAJOR, 0x2b, int)
61 #define RUN_ARRAY _IOW (MD_MAJOR, 0x30, mdu_param_t)
62 /* 0x31 was START_ARRAY */
63 #define STOP_ARRAY _IO (MD_MAJOR, 0x32)
64 #define STOP_ARRAY_RO _IO (MD_MAJOR, 0x33)
65 #define RESTART_ARRAY_RW _IO (MD_MAJOR, 0x34)
67 /* 63 partitions with the alternate major number (mdp) */
68 #define MdpMinorShift 6
73 typedef struct mdu_version_s {
79 typedef struct mdu_array_info_s {
81 * Generic constant information
95 * Generic state information
97 int utime; /* 0 Superblock update time */
98 int state; /* 1 State bits (clean, ...) */
99 int active_disks; /* 2 Number of currently active disks */
100 int working_disks; /* 3 Number of working disks */
101 int failed_disks; /* 4 Number of failed disks */
102 int spare_disks; /* 5 Number of spare disks */
105 * Personality information
107 int layout; /* 0 the array's physical layout */
108 int chunk_size; /* 1 chunk size in bytes */
112 /* non-obvious values for 'level' */
113 #define LEVEL_MULTIPATH (-4)
114 #define LEVEL_LINEAR (-1)
115 #define LEVEL_FAULTY (-5)
117 /* we need a value for 'no level specified' and 0
118 * means 'raid0', so we need something else. This is
119 * for internal use only
121 #define LEVEL_NONE (-1000000)
123 typedef struct mdu_disk_info_s {
125 * configuration/status of one particular disk
135 typedef struct mdu_start_info_s {
137 * configuration/status of one particular disk
146 typedef struct mdu_bitmap_file_s
151 typedef struct mdu_param_s
153 int personality; /* 1,2,3,4 */
154 int chunk_size; /* in bytes */
155 int max_fault; /* unused for now */