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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;