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authorNeilBrown <neilb@suse.de>2009-03-30 23:33:13 -0400
committerNeilBrown <neilb@suse.de>2009-03-30 23:33:13 -0400
commit43b2e5d86d8bdd77386226db0bc961529492c043 (patch)
tree601a885b1410324678cf319eee77cc54a02f2cf3 /include/linux/raid
parentbff61975b3d6c18ee31457cc5b4d73042f44915f (diff)
md: move md_k.h from include/linux/raid/ to drivers/md/
It really is nicer to keep related code together.. Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'include/linux/raid')
-rw-r--r--include/linux/raid/md_k.h411
1 files changed, 0 insertions, 411 deletions
diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
deleted file mode 100644
index e78b3c1d55fd..000000000000
--- a/include/linux/raid/md_k.h
+++ /dev/null
@@ -1,411 +0,0 @@
1/*
2 md_k.h : kernel internal structure of the Linux MD driver
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_K_H
16#define _MD_K_H
17
18#ifdef CONFIG_BLOCK
19
20#define MaxSector (~(sector_t)0)
21
22typedef struct mddev_s mddev_t;
23typedef struct mdk_rdev_s mdk_rdev_t;
24
25/*
26 * options passed in raidrun:
27 */
28
29/* Currently this must fit in an 'int' */
30#define MAX_CHUNK_SIZE (1<<30)
31
32/*
33 * MD's 'extended' device
34 */
35struct mdk_rdev_s
36{
37 struct list_head same_set; /* RAID devices within the same set */
38
39 sector_t size; /* Device size (in blocks) */
40 mddev_t *mddev; /* RAID array if running */
41 int last_events; /* IO event timestamp */
42
43 struct block_device *bdev; /* block device handle */
44
45 struct page *sb_page;
46 int sb_loaded;
47 __u64 sb_events;
48 sector_t data_offset; /* start of data in array */
49 sector_t sb_start; /* offset of the super block (in 512byte sectors) */
50 int sb_size; /* bytes in the superblock */
51 int preferred_minor; /* autorun support */
52
53 struct kobject kobj;
54
55 /* A device can be in one of three states based on two flags:
56 * Not working: faulty==1 in_sync==0
57 * Fully working: faulty==0 in_sync==1
58 * Working, but not
59 * in sync with array
60 * faulty==0 in_sync==0
61 *
62 * It can never have faulty==1, in_sync==1
63 * This reduces the burden of testing multiple flags in many cases
64 */
65
66 unsigned long flags;
67#define Faulty 1 /* device is known to have a fault */
68#define In_sync 2 /* device is in_sync with rest of array */
69#define WriteMostly 4 /* Avoid reading if at all possible */
70#define BarriersNotsupp 5 /* BIO_RW_BARRIER is not supported */
71#define AllReserved 6 /* If whole device is reserved for
72 * one array */
73#define AutoDetected 7 /* added by auto-detect */
74#define Blocked 8 /* An error occured on an externally
75 * managed array, don't allow writes
76 * until it is cleared */
77#define StateChanged 9 /* Faulty or Blocked has changed during
78 * interrupt, so it needs to be
79 * notified by the thread */
80 wait_queue_head_t blocked_wait;
81
82 int desc_nr; /* descriptor index in the superblock */
83 int raid_disk; /* role of device in array */
84 int saved_raid_disk; /* role that device used to have in the
85 * array and could again if we did a partial
86 * resync from the bitmap
87 */
88 sector_t recovery_offset;/* If this device has been partially
89 * recovered, this is where we were
90 * up to.
91 */
92
93 atomic_t nr_pending; /* number of pending requests.
94 * only maintained for arrays that
95 * support hot removal
96 */
97 atomic_t read_errors; /* number of consecutive read errors that
98 * we have tried to ignore.
99 */
100 atomic_t corrected_errors; /* number of corrected read errors,
101 * for reporting to userspace and storing
102 * in superblock.
103 */
104 struct work_struct del_work; /* used for delayed sysfs removal */
105
106 struct sysfs_dirent *sysfs_state; /* handle for 'state'
107 * sysfs entry */
108};
109
110struct mddev_s
111{
112 void *private;
113 struct mdk_personality *pers;
114 dev_t unit;
115 int md_minor;
116 struct list_head disks;
117 unsigned long flags;
118#define MD_CHANGE_DEVS 0 /* Some device status has changed */
119#define MD_CHANGE_CLEAN 1 /* transition to or from 'clean' */
120#define MD_CHANGE_PENDING 2 /* superblock update in progress */
121
122 int ro;
123
124 struct gendisk *gendisk;
125
126 struct kobject kobj;
127 int hold_active;
128#define UNTIL_IOCTL 1
129#define UNTIL_STOP 2
130
131 /* Superblock information */
132 int major_version,
133 minor_version,
134 patch_version;
135 int persistent;
136 int external; /* metadata is
137 * managed externally */
138 char metadata_type[17]; /* externally set*/
139 int chunk_size;
140 time_t ctime, utime;
141 int level, layout;
142 char clevel[16];
143 int raid_disks;
144 int max_disks;
145 sector_t size; /* used size of component devices */
146 sector_t array_sectors; /* exported array size */
147 __u64 events;
148
149 char uuid[16];
150
151 /* If the array is being reshaped, we need to record the
152 * new shape and an indication of where we are up to.
153 * This is written to the superblock.
154 * If reshape_position is MaxSector, then no reshape is happening (yet).
155 */
156 sector_t reshape_position;
157 int delta_disks, new_level, new_layout, new_chunk;
158
159 struct mdk_thread_s *thread; /* management thread */
160 struct mdk_thread_s *sync_thread; /* doing resync or reconstruct */
161 sector_t curr_resync; /* last block scheduled */
162 unsigned long resync_mark; /* a recent timestamp */
163 sector_t resync_mark_cnt;/* blocks written at resync_mark */
164 sector_t curr_mark_cnt; /* blocks scheduled now */
165
166 sector_t resync_max_sectors; /* may be set by personality */
167
168 sector_t resync_mismatches; /* count of sectors where
169 * parity/replica mismatch found
170 */
171
172 /* allow user-space to request suspension of IO to regions of the array */
173 sector_t suspend_lo;
174 sector_t suspend_hi;
175 /* if zero, use the system-wide default */
176 int sync_speed_min;
177 int sync_speed_max;
178
179 /* resync even though the same disks are shared among md-devices */
180 int parallel_resync;
181
182 int ok_start_degraded;
183 /* recovery/resync flags
184 * NEEDED: we might need to start a resync/recover
185 * RUNNING: a thread is running, or about to be started
186 * SYNC: actually doing a resync, not a recovery