Gitiles
Code Review Sign In
gerrit-public.fairphone.software / kernel / msm-4.9 / 55467dea2967259f21f4f854fc99d39cc5fea60e / . / include / uapi / linux / raid / md_u.h
blob: 36cd8210a5d1ddc478dc36f9fdd68e3bda6cc313 [file] [log] [blame]
David Howellsfc5a40a2012-10-09 09:49:02 +0100[diff] [blame]1/*
2 md_u.h : user <=> kernel API between Linux raidtools and RAID drivers
3 Copyright (C) 1998 Ingo Molnar
4
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)
8 any later version.
9
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.
13*/
14
15#ifndef _UAPI_MD_U_H
16#define _UAPI_MD_U_H
17
18/*
19 * Different major versions are not compatible.
20 * Different minor versions are only downward compatible.
21 * Different patchlevel versions are downward and upward compatible.
22 */
23#define MD_MAJOR_VERSION 0
24#define MD_MINOR_VERSION 90
25/*
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
33 */
34#define MD_PATCHLEVEL_VERSION 3
35
36/* ioctls */
37
38/* status */
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)
David Howellsfc5a40a2012-10-09 09:49:02 +0100[diff] [blame]42#define RAID_AUTORUN _IO (MD_MAJOR, 0x14)
43#define GET_BITMAP_FILE _IOR (MD_MAJOR, 0x15, mdu_bitmap_file_t)
44
45/* configuration */
46#define CLEAR_ARRAY _IO (MD_MAJOR, 0x20)
47#define ADD_NEW_DISK _IOW (MD_MAJOR, 0x21, mdu_disk_info_t)
48#define HOT_REMOVE_DISK _IO (MD_MAJOR, 0x22)
49#define SET_ARRAY_INFO _IOW (MD_MAJOR, 0x23, mdu_array_info_t)
50#define SET_DISK_INFO _IO (MD_MAJOR, 0x24)
51#define WRITE_RAID_INFO _IO (MD_MAJOR, 0x25)
52#define UNPROTECT_ARRAY _IO (MD_MAJOR, 0x26)
53#define PROTECT_ARRAY _IO (MD_MAJOR, 0x27)
54#define HOT_ADD_DISK _IO (MD_MAJOR, 0x28)
55#define SET_DISK_FAULTY _IO (MD_MAJOR, 0x29)
56#define HOT_GENERATE_ERROR _IO (MD_MAJOR, 0x2a)
57#define SET_BITMAP_FILE _IOW (MD_MAJOR, 0x2b, int)
58
59/* usage */
60#define RUN_ARRAY _IOW (MD_MAJOR, 0x30, mdu_param_t)
61/* 0x31 was START_ARRAY */
62#define STOP_ARRAY _IO (MD_MAJOR, 0x32)
63#define STOP_ARRAY_RO _IO (MD_MAJOR, 0x33)
64#define RESTART_ARRAY_RW _IO (MD_MAJOR, 0x34)
Goldwyn Rodrigues1aee41f2014-10-29 18:51:31 -0500[diff] [blame]65#define CLUSTERED_DISK_NACK _IO (MD_MAJOR, 0x35)
David Howellsfc5a40a2012-10-09 09:49:02 +0100[diff] [blame]66
67/* 63 partitions with the alternate major number (mdp) */
68#define MdpMinorShift 6
69
70typedef struct mdu_version_s {
71 int major;
72 int minor;
73 int patchlevel;
74} mdu_version_t;
75
76typedef struct mdu_array_info_s {
77 /*
78 * Generic constant information
79 */
80 int major_version;
81 int minor_version;
82 int patch_version;
Deepa Dinamani9ebc6ef2015-12-21 10:51:01 +1100[diff] [blame]83 unsigned int ctime;
David Howellsfc5a40a2012-10-09 09:49:02 +0100[diff] [blame]84 int level;
85 int size;
86 int nr_disks;
87 int raid_disks;
88 int md_minor;
89 int not_persistent;
90
91 /*
92 * Generic state information
93 */
Deepa Dinamani9ebc6ef2015-12-21 10:51:01 +1100[diff] [blame]94 unsigned int utime; /* 0 Superblock update time */
David Howellsfc5a40a2012-10-09 09:49:02 +0100[diff] [blame]95 int state; /* 1 State bits (clean, ...) */
96 int active_disks; /* 2 Number of currently active disks */
97 int working_disks; /* 3 Number of working disks */
98 int failed_disks; /* 4 Number of failed disks */
99 int spare_disks; /* 5 Number of spare disks */
100
101 /*
102 * Personality information
103 */
104 int layout; /* 0 the array's physical layout */
105 int chunk_size; /* 1 chunk size in bytes */
106
107} mdu_array_info_t;
108
109/* non-obvious values for 'level' */
110#define LEVEL_MULTIPATH (-4)
111#define LEVEL_LINEAR (-1)
112#define LEVEL_FAULTY (-5)
113
114/* we need a value for 'no level specified' and 0
115 * means 'raid0', so we need something else. This is
116 * for internal use only
117 */
118#define LEVEL_NONE (-1000000)
119
120typedef struct mdu_disk_info_s {
121 /*
122 * configuration/status of one particular disk
123 */
124 int number;
125 int major;
126 int minor;
127 int raid_disk;
128 int state;
129
130} mdu_disk_info_t;
131
132typedef struct mdu_start_info_s {
133 /*
134 * configuration/status of one particular disk
135 */
136 int major;
137 int minor;
138 int raid_disk;
139 int state;
140
141} mdu_start_info_t;
142
143typedef struct mdu_bitmap_file_s
144{
145 char pathname[4096];
146} mdu_bitmap_file_t;
147
148typedef struct mdu_param_s
149{
150 int personality; /* 1,2,3,4 */
151 int chunk_size; /* in bytes */
152 int max_fault; /* unused for now */
153} mdu_param_t;
154
155#endif /* _UAPI_MD_U_H */