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authorDavid Howells <dhowells@redhat.com>2012-10-09 04:49:02 -0400
committerDavid Howells <dhowells@redhat.com>2012-10-09 04:49:02 -0400
commitfc5a40a2301aa241eedb16caf9169ca5763707c1 (patch)
tree1fab97cd17919f36668f5f71d8062ecd10b50003 /include/linux
parent9e2d8656f5e8aa214e66b462680cf86b210b74a8 (diff)
UAPI: (Scripted) Disintegrate include/linux/raid
Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Michael Kerrisk <mtk.manpages@gmail.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Dave Jones <davej@redhat.com>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/raid/Kbuild2
-rw-r--r--include/linux/raid/md_p.h301
-rw-r--r--include/linux/raid/md_u.h141
3 files changed, 1 insertions, 443 deletions
diff --git a/include/linux/raid/Kbuild b/include/linux/raid/Kbuild
index 2415a64c5e51..e69de29bb2d1 100644
--- a/include/linux/raid/Kbuild
+++ b/include/linux/raid/Kbuild
@@ -1,2 +0,0 @@
1header-y += md_p.h
2header-y += md_u.h
diff --git a/include/linux/raid/md_p.h b/include/linux/raid/md_p.h
deleted file mode 100644
index ee753536ab70..000000000000
--- a/include/linux/raid/md_p.h
+++ /dev/null
@@ -1,301 +0,0 @@
1/*
2 md_p.h : physical layout of Linux RAID devices
3 Copyright (C) 1996-98 Ingo Molnar, Gadi Oxman
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_P_H
16#define _MD_P_H
17
18#include <linux/types.h>
19
20/*
21 * RAID superblock.
22 *
23 * The RAID superblock maintains some statistics on each RAID configuration.
24 * Each real device in the RAID set contains it near the end of the device.
25 * Some of the ideas are copied from the ext2fs implementation.
26 *
27 * We currently use 4096 bytes as follows:
28 *
29 * word offset function
30 *
31 * 0 - 31 Constant generic RAID device information.
32 * 32 - 63 Generic state information.
33 * 64 - 127 Personality specific information.
34 * 128 - 511 12 32-words descriptors of the disks in the raid set.
35 * 512 - 911 Reserved.
36 * 912 - 1023 Disk specific descriptor.
37 */
38
39/*
40 * If x is the real device size in bytes, we return an apparent size of:
41 *
42 * y = (x & ~(MD_RESERVED_BYTES - 1)) - MD_RESERVED_BYTES
43 *
44 * and place the 4kB superblock at offset y.
45 */
46#define MD_RESERVED_BYTES (64 * 1024)
47#define MD_RESERVED_SECTORS (MD_RESERVED_BYTES / 512)
48
49#define MD_NEW_SIZE_SECTORS(x) ((x & ~(MD_RESERVED_SECTORS - 1)) - MD_RESERVED_SECTORS)
50
51#define MD_SB_BYTES 4096
52#define MD_SB_WORDS (MD_SB_BYTES / 4)
53#define MD_SB_SECTORS (MD_SB_BYTES / 512)
54
55/*
56 * The following are counted in 32-bit words
57 */
58#define MD_SB_GENERIC_OFFSET 0
59#define MD_SB_PERSONALITY_OFFSET 64
60#define MD_SB_DISKS_OFFSET 128
61#define MD_SB_DESCRIPTOR_OFFSET 992
62
63#define MD_SB_GENERIC_CONSTANT_WORDS 32
64#define MD_SB_GENERIC_STATE_WORDS 32
65#define MD_SB_GENERIC_WORDS (MD_SB_GENERIC_CONSTANT_WORDS + MD_SB_GENERIC_STATE_WORDS)
66#define MD_SB_PERSONALITY_WORDS 64
67#define MD_SB_DESCRIPTOR_WORDS 32
68#define MD_SB_DISKS 27
69#define MD_SB_DISKS_WORDS (MD_SB_DISKS*MD_SB_DESCRIPTOR_WORDS)
70#define MD_SB_RESERVED_WORDS (1024 - MD_SB_GENERIC_WORDS - MD_SB_PERSONALITY_WORDS - MD_SB_DISKS_WORDS - MD_SB_DESCRIPTOR_WORDS)
71#define MD_SB_EQUAL_WORDS (MD_SB_GENERIC_WORDS + MD_SB_PERSONALITY_WORDS + MD_SB_DISKS_WORDS)
72
73/*
74 * Device "operational" state bits
75 */
76#define MD_DISK_FAULTY 0 /* disk is faulty / operational */
77#define MD_DISK_ACTIVE 1 /* disk is running or spare disk */
78#define MD_DISK_SYNC 2 /* disk is in sync with the raid set */
79#define MD_DISK_REMOVED 3 /* disk is in sync with the raid set */
80
81#define MD_DISK_WRITEMOSTLY 9 /* disk is "write-mostly" is RAID1 config.
82 * read requests will only be sent here in
83 * dire need
84 */
85
86typedef struct mdp_device_descriptor_s {
87 __u32 number; /* 0 Device number in the entire set */
88 __u32 major; /* 1 Device major number */
89 __u32 minor; /* 2 Device minor number */
90 __u32 raid_disk; /* 3 The role of the device in the raid set */
91 __u32 state; /* 4 Operational state */
92 __u32 reserved[MD_SB_DESCRIPTOR_WORDS - 5];
93} mdp_disk_t;
94
95#define MD_SB_MAGIC 0xa92b4efc
96
97/*
98 * Superblock state bits
99 */
100#define MD_SB_CLEAN 0
101#define MD_SB_ERRORS 1
102
103#define MD_SB_BITMAP_PRESENT 8 /* bitmap may be present nearby */
104
105/*
106 * Notes:
107 * - if an array is being reshaped (restriped) in order to change the
108 * the number of active devices in the array, 'raid_disks' will be
109 * the larger of the old and new numbers. 'delta_disks' will
110 * be the "new - old". So if +ve, raid_disks is the new value, and
111 * "raid_disks-delta_disks" is the old. If -ve, raid_disks is the
112 * old value and "raid_disks+delta_disks" is the new (smaller) value.
113 */
114
115
116typedef struct mdp_superblock_s {
117 /*
118 * Constant generic information
119 */
120 __u32 md_magic; /* 0 MD identifier */
121 __u32 major_version; /* 1 major version to which the set conforms */
122 __u32 minor_version; /* 2 minor version ... */
123 __u32 patch_version; /* 3 patchlevel version ... */
124 __u32 gvalid_words; /* 4 Number of used words in this section */
125 __u32 set_uuid0; /* 5 Raid set identifier */
126 __u32 ctime; /* 6 Creation time */
127 __u32 level; /* 7 Raid personality */
128 __u32 size; /* 8 Apparent size of each individual disk */
129 __u32 nr_disks; /* 9 total disks in the raid set */
130 __u32 raid_disks; /* 10 disks in a fully functional raid set */
131 __u32 md_minor; /* 11 preferred MD minor device number */
132 __u32 not_persistent; /* 12 does it have a persistent superblock */
133 __u32 set_uuid1; /* 13 Raid set identifier #2 */
134 __u32 set_uuid2; /* 14 Raid set identifier #3 */
135 __u32 set_uuid3; /* 15 Raid set identifier #4 */
136 __u32 gstate_creserved[MD_SB_GENERIC_CONSTANT_WORDS - 16];
137
138 /*
139 * Generic state information
140 */
141 __u32 utime; /* 0 Superblock update time */
142 __u32 state; /* 1 State bits (clean, ...) */
143 __u32 active_disks; /* 2 Number of currently active disks */
144 __u32 working_disks; /* 3 Number of working disks */
145 __u32 failed_disks; /* 4 Number of failed disks */
146 __u32 spare_disks; /* 5 Number of spare disks */
147 __u32 sb_csum; /* 6 checksum of the whole superblock */
148#ifdef __BIG_ENDIAN
149 __u32 events_hi; /* 7 high-order of superblock update count */
150 __u32 events_lo; /* 8 low-order of superblock update count */
151 __u32 cp_events_hi; /* 9 high-order of checkpoint update count */
152 __u32 cp_events_lo; /* 10 low-order of checkpoint update count */
153#else
154 __u32 events_lo; /* 7 low-order of superblock update count */
155 __u32 events_hi; /* 8 high-order of superblock update count */
156 __u32 cp_events_lo; /* 9 low-order of checkpoint update count */
157 __u32 cp_events_hi; /* 10 high-order of checkpoint update count */
158#endif
159 __u32 recovery_cp; /* 11 recovery checkpoint sector count */
160 /* There are only valid for minor_version > 90 */
161 __u64 reshape_position; /* 12,13 next address in array-space for reshape */
162 __u32 new_level; /* 14 new level we are reshaping to */
163 __u32 delta_disks; /* 15 change in number of raid_disks */
164 __u32 new_layout; /* 16 new layout */
165 __u32 new_chunk; /* 17 new chunk size (bytes) */
166 __u32 gstate_sreserved[MD_SB_GENERIC_STATE_WORDS - 18];
167
168 /*
169 * Personality information
170 */
171 __u32 layout; /* 0 the array's physical layout */
172 __u32 chunk_size; /* 1 chunk size in bytes */
173 __u32 root_pv; /* 2 LV root PV */
174 __u32 root_block; /* 3 LV root block */
175 __u32 pstate_reserved[MD_SB_PERSONALITY_WORDS - 4];
176
177 /*
178 * Disks information
179 */
180 mdp_disk_t disks[MD_SB_DISKS];
181
182 /*
183 * Reserved
184 */
185 __u32 reserved[MD_SB_RESERVED_WORDS];
186
187 /*
188 * Active descriptor
189 */
190 mdp_disk_t this_disk;
191
192} mdp_super_t;
193
194static inline __u64 md_event(mdp_super_t *sb) {
195 __u64 ev = sb->events_hi;
196 return (ev<<32)| sb->events_lo;
197}
198
199#define MD_SUPERBLOCK_1_TIME_SEC_MASK ((1ULL<<40) - 1)
200
201/*
202 * The version-1 superblock :
203 * All numeric fields are little-endian.
204 *
205 * total size: 256 bytes plus 2 per device.
206 * 1K allows 384 devices.
207 */
208struct mdp_superblock_1 {
209 /* constant array information - 128 bytes */
210 __le32 magic; /* MD_SB_MAGIC: 0xa92b4efc - little endian */
211 __le32 major_version; /* 1 */
212 __le32 feature_map; /* bit 0 set if 'bitmap_offset' is meaningful */
213 __le32 pad0; /* always set to 0 when writing */
214
215 __u8 set_uuid[16]; /* user-space generated. */
216 char set_name[32]; /* set and interpreted by user-space */
217
218 __le64 ctime; /* lo 40 bits are seconds, top 24 are microseconds or 0*/
219 __le32 level; /* -4 (multipath), -1 (linear), 0,1,4,5 */
220 __le32 layout; /* only for raid5 and raid10 currently */
221 __le64 size; /* used size of component devices, in 512byte sectors */
222
223 __le32 chunksize; /* in 512byte sectors */
224 __le32 raid_disks;
225 __le32 bitmap_offset; /* sectors after start of superblock that bitmap starts
226 * NOTE: signed, so bitmap can be before superblock
227 * only meaningful of feature_map[0] is set.
228 */
229
230 /* These are only valid with feature bit '4' */
231 __le32 new_level; /* new level we are reshaping to */
232 __le64 reshape_position; /* next address in array-space for reshape */
233 __le32 delta_disks; /* change in number of raid_disks */
234 __le32 new_layout; /* new layout */
235 __le32 new_chunk; /* new chunk size (512byte sectors) */
236 __le32 new_offset; /* signed number to add to data_offset in new
237 * layout. 0 == no-change. This can be
238 * different on each device in the array.
239 */
240
241 /* constant this-device information - 64 bytes */
242 __le64 data_offset; /* sector start of data, often 0 */
243 __le64 data_size; /* sectors in this device that can be used for data */
244 __le64 super_offset; /* sector start of this superblock */
245 __le64 recovery_offset;/* sectors before this offset (from data_offset) have been recovered */
246 __le32 dev_number; /* permanent identifier of this device - not role in raid */
247 __le32 cnt_corrected_read; /* number of read errors that were corrected by re-writing */
248 __u8 device_uuid[16]; /* user-space setable, ignored by kernel */
249 __u8 devflags; /* per-device flags. Only one defined...*/
250#define WriteMostly1 1 /* mask for writemostly flag in above */
251 /* Bad block log. If there are any bad blocks the feature flag is set.
252 * If offset and size are non-zero, that space is reserved and available
253 */
254 __u8 bblog_shift; /* shift from sectors to block size */
255 __le16 bblog_size; /* number of sectors reserved for list */
256 __le32 bblog_offset; /* sector offset from superblock to bblog,
257 * signed - not unsigned */
258
259 /* array state information - 64 bytes */
260 __le64 utime; /* 40 bits second, 24 bits microseconds */
261 __le64 events; /* incremented when superblock updated */
262 __le64 resync_offset; /* data before this offset (from data_offset) known to be in sync */
263 __le32 sb_csum; /* checksum up to devs[max_dev] */
264 __le32 max_dev; /* size of devs[] array to consider */
265 __u8 pad3[64-32]; /* set to 0 when writing */
266
267 /* device state information. Indexed by dev_number.
268 * 2 bytes per device
269 * Note there are no per-device state flags. State information is rolled
270 * into the 'roles' value. If a device is spare or faulty, then it doesn't
271 * have a meaningful role.
272 */
273 __le16 dev_roles[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */
274};
275
276/* feature_map bits */
277#define MD_FEATURE_BITMAP_OFFSET 1
278#define MD_FEATURE_RECOVERY_OFFSET 2 /* recovery_offset is present and
279 * must be honoured
280 */
281#define MD_FEATURE_RESHAPE_ACTIVE 4
282#define MD_FEATURE_BAD_BLOCKS 8 /* badblock list is not empty */
283#define MD_FEATURE_REPLACEMENT 16 /* This device is replacing an
284 * active device with same 'role'.
285 * 'recovery_offset' is also set.
286 */
287#define MD_FEATURE_RESHAPE_BACKWARDS 32 /* Reshape doesn't change number
288 * of devices, but is going
289 * backwards anyway.
290 */
291#define MD_FEATURE_NEW_OFFSET 64 /* new_offset must be honoured */
292#define MD_FEATURE_ALL (MD_FEATURE_BITMAP_OFFSET \
293 |MD_FEATURE_RECOVERY_OFFSET \
294 |MD_FEATURE_RESHAPE_ACTIVE \
295 |MD_FEATURE_BAD_BLOCKS \
296 |MD_FEATURE_REPLACEMENT \
297 |MD_FEATURE_RESHAPE_BACKWARDS \
298 |MD_FEATURE_NEW_OFFSET \
299 )
300
301#endif
diff --git a/include/linux/raid/md_u.h b/include/linux/raid/md_u.h
index fb1abb3367e9..358c04bfbe2a 100644
--- a/include/linux/raid/md_u.h
+++ b/include/linux/raid/md_u.h
@@ -11,149 +11,10 @@
11 (for example /usr/src/linux/COPYING); if not, write to the Free 11 (for example /usr/src/linux/COPYING); if not, write to the Free
12 Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 12 Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
13*/ 13*/
14
15#ifndef _MD_U_H 14#ifndef _MD_U_H
16#define _MD_U_H 15#define _MD_U_H
17 16
18/* 17#include <uapi/linux/raid/md_u.h>
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)
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)
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)
58#define SET_BITMAP_FILE _IOW (MD_MAJOR, 0x2b, int)
59 18
60/* usage */
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)
66
67/* 63 partitions with the alternate major number (mdp) */
68#define MdpMinorShift 6
69#ifdef __KERNEL__
70extern int mdp_major; 19extern int mdp_major;
71#endif
72
73typedef struct mdu_version_s {
74 int major;
75 int minor;
76 int patchlevel;
77} mdu_version_t;
78
79typedef 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
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
123typedef 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
135typedef 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
146typedef struct mdu_bitmap_file_s
147{
148 char pathname[4096];
149} mdu_bitmap_file_t;
150
151typedef 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 20#endif
159
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