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1da177e4 LT |
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 _MD_U_H | |
16 | #define _MD_U_H | |
17 | ||
92022950 N |
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 | ||
1da177e4 LT |
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) | |
42 | #define PRINT_RAID_DEBUG _IO (MD_MAJOR, 0x13) | |
43 | #define RAID_AUTORUN _IO (MD_MAJOR, 0x14) | |
32a7627c | 44 | #define GET_BITMAP_FILE _IOR (MD_MAJOR, 0x15, mdu_bitmap_file_t) |
1da177e4 LT |
45 | |
46 | /* configuration */ | |
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) | |
32a7627c | 58 | #define SET_BITMAP_FILE _IOW (MD_MAJOR, 0x2b, int) |
1da177e4 LT |
59 | |
60 | /* usage */ | |
61 | #define RUN_ARRAY _IOW (MD_MAJOR, 0x30, mdu_param_t) | |
fbedac04 | 62 | /* 0x31 was START_ARRAY */ |
1da177e4 LT |
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) | |
66 | ||
8b2b5c21 N |
67 | /* 63 partitions with the alternate major number (mdp) */ |
68 | #define MdpMinorShift 6 | |
69 | #ifdef __KERNEL__ | |
70 | extern int mdp_major; | |
71 | #endif | |
72 | ||
1da177e4 LT |
73 | typedef struct mdu_version_s { |
74 | int major; | |
75 | int minor; | |
76 | int patchlevel; | |
77 | } mdu_version_t; | |
78 | ||
79 | typedef struct mdu_array_info_s { | |
80 | /* | |
81 | * Generic constant information | |
82 | */ | |
83 | int major_version; | |
84 | int minor_version; | |
85 | int patch_version; | |
86 | int ctime; | |
87 | int level; | |
88 | int size; | |
89 | int nr_disks; | |
90 | int raid_disks; | |
91 | int md_minor; | |
92 | int not_persistent; | |
93 | ||
94 | /* | |
95 | * Generic state information | |
96 | */ | |
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 */ | |
103 | ||
104 | /* | |
105 | * Personality information | |
106 | */ | |
107 | int layout; /* 0 the array's physical layout */ | |
108 | int chunk_size; /* 1 chunk size in bytes */ | |
109 | ||
110 | } mdu_array_info_t; | |
111 | ||
8b2b5c21 N |
112 | /* non-obvious values for 'level' */ |
113 | #define LEVEL_MULTIPATH (-4) | |
114 | #define LEVEL_LINEAR (-1) | |
115 | #define LEVEL_FAULTY (-5) | |
116 | ||
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 | |
120 | */ | |
121 | #define LEVEL_NONE (-1000000) | |
122 | ||
1da177e4 LT |
123 | typedef struct mdu_disk_info_s { |
124 | /* | |
125 | * configuration/status of one particular disk | |
126 | */ | |
127 | int number; | |
128 | int major; | |
129 | int minor; | |
130 | int raid_disk; | |
131 | int state; | |
132 | ||
133 | } mdu_disk_info_t; | |
134 | ||
135 | typedef struct mdu_start_info_s { | |
136 | /* | |
137 | * configuration/status of one particular disk | |
138 | */ | |
139 | int major; | |
140 | int minor; | |
141 | int raid_disk; | |
142 | int state; | |
143 | ||
144 | } mdu_start_info_t; | |
145 | ||
32a7627c N |
146 | typedef struct mdu_bitmap_file_s |
147 | { | |
148 | char pathname[4096]; | |
149 | } mdu_bitmap_file_t; | |
150 | ||
1da177e4 LT |
151 | typedef struct mdu_param_s |
152 | { | |
153 | int personality; /* 1,2,3,4 */ | |
154 | int chunk_size; /* in bytes */ | |
155 | int max_fault; /* unused for now */ | |
156 | } mdu_param_t; | |
157 | ||
158 | #endif | |
159 |