Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | ||
63fe0817 CH |
15 | #ifndef _MD_MD_H |
16 | #define _MD_MD_H | |
17 | ||
18 | #include <linux/blkdev.h> | |
19 | #include <linux/kobject.h> | |
20 | #include <linux/list.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/mutex.h> | |
23 | #include <linux/timer.h> | |
24 | #include <linux/wait.h> | |
25 | #include <linux/workqueue.h> | |
9361401e | 26 | |
1da177e4 | 27 | #define MaxSector (~(sector_t)0) |
1da177e4 | 28 | |
1da177e4 LT |
29 | typedef struct mddev_s mddev_t; |
30 | typedef struct mdk_rdev_s mdk_rdev_t; | |
31 | ||
2ac87401 N |
32 | /* generic plugging support - like that provided with request_queue, |
33 | * but does not require a request_queue | |
34 | */ | |
35 | struct plug_handle { | |
36 | void (*unplug_fn)(struct plug_handle *); | |
37 | struct timer_list unplug_timer; | |
38 | struct work_struct unplug_work; | |
39 | unsigned long unplug_flag; | |
40 | }; | |
41 | #define PLUGGED_FLAG 1 | |
42 | void plugger_init(struct plug_handle *plug, | |
43 | void (*unplug_fn)(struct plug_handle *)); | |
44 | void plugger_set_plug(struct plug_handle *plug); | |
45 | int plugger_remove_plug(struct plug_handle *plug); | |
46 | static inline void plugger_flush(struct plug_handle *plug) | |
47 | { | |
48 | del_timer_sync(&plug->unplug_timer); | |
49 | cancel_work_sync(&plug->unplug_work); | |
50 | } | |
51 | ||
1da177e4 LT |
52 | /* |
53 | * MD's 'extended' device | |
54 | */ | |
55 | struct mdk_rdev_s | |
56 | { | |
57 | struct list_head same_set; /* RAID devices within the same set */ | |
58 | ||
dd8ac336 | 59 | sector_t sectors; /* Device size (in 512bytes sectors) */ |
1da177e4 | 60 | mddev_t *mddev; /* RAID array if running */ |
eea1bf38 | 61 | int last_events; /* IO event timestamp */ |
1da177e4 LT |
62 | |
63 | struct block_device *bdev; /* block device handle */ | |
64 | ||
65 | struct page *sb_page; | |
66 | int sb_loaded; | |
42543769 | 67 | __u64 sb_events; |
1da177e4 | 68 | sector_t data_offset; /* start of data in array */ |
0f420358 | 69 | sector_t sb_start; /* offset of the super block (in 512byte sectors) */ |
0002b271 | 70 | int sb_size; /* bytes in the superblock */ |
1da177e4 LT |
71 | int preferred_minor; /* autorun support */ |
72 | ||
86e6ffdd N |
73 | struct kobject kobj; |
74 | ||
1da177e4 LT |
75 | /* A device can be in one of three states based on two flags: |
76 | * Not working: faulty==1 in_sync==0 | |
77 | * Fully working: faulty==0 in_sync==1 | |
78 | * Working, but not | |
79 | * in sync with array | |
80 | * faulty==0 in_sync==0 | |
81 | * | |
82 | * It can never have faulty==1, in_sync==1 | |
83 | * This reduces the burden of testing multiple flags in many cases | |
84 | */ | |
1da177e4 | 85 | |
b2d444d7 N |
86 | unsigned long flags; |
87 | #define Faulty 1 /* device is known to have a fault */ | |
88 | #define In_sync 2 /* device is in_sync with rest of array */ | |
8ddf9efe | 89 | #define WriteMostly 4 /* Avoid reading if at all possible */ |
c5d79adb N |
90 | #define AllReserved 6 /* If whole device is reserved for |
91 | * one array */ | |
d0fae18f | 92 | #define AutoDetected 7 /* added by auto-detect */ |
6bfe0b49 DW |
93 | #define Blocked 8 /* An error occured on an externally |
94 | * managed array, don't allow writes | |
95 | * until it is cleared */ | |
96 | wait_queue_head_t blocked_wait; | |
8ddf9efe | 97 | |
1da177e4 LT |
98 | int desc_nr; /* descriptor index in the superblock */ |
99 | int raid_disk; /* role of device in array */ | |
e93f68a1 N |
100 | int new_raid_disk; /* role that the device will have in |
101 | * the array after a level-change completes. | |
102 | */ | |
41158c7e N |
103 | int saved_raid_disk; /* role that device used to have in the |
104 | * array and could again if we did a partial | |
105 | * resync from the bitmap | |
106 | */ | |
5fd6c1dc N |
107 | sector_t recovery_offset;/* If this device has been partially |
108 | * recovered, this is where we were | |
109 | * up to. | |
110 | */ | |
1da177e4 LT |
111 | |
112 | atomic_t nr_pending; /* number of pending requests. | |
113 | * only maintained for arrays that | |
114 | * support hot removal | |
115 | */ | |
ba22dcbf N |
116 | atomic_t read_errors; /* number of consecutive read errors that |
117 | * we have tried to ignore. | |
118 | */ | |
1e50915f RB |
119 | struct timespec last_read_error; /* monotonic time since our |
120 | * last read error | |
121 | */ | |
4dbcdc75 N |
122 | atomic_t corrected_errors; /* number of corrected read errors, |
123 | * for reporting to userspace and storing | |
124 | * in superblock. | |
125 | */ | |
5792a285 | 126 | struct work_struct del_work; /* used for delayed sysfs removal */ |
3c0ee63a N |
127 | |
128 | struct sysfs_dirent *sysfs_state; /* handle for 'state' | |
129 | * sysfs entry */ | |
1da177e4 LT |
130 | }; |
131 | ||
1da177e4 LT |
132 | struct mddev_s |
133 | { | |
134 | void *private; | |
2604b703 | 135 | struct mdk_personality *pers; |
1da177e4 LT |
136 | dev_t unit; |
137 | int md_minor; | |
138 | struct list_head disks; | |
850b2b42 N |
139 | unsigned long flags; |
140 | #define MD_CHANGE_DEVS 0 /* Some device status has changed */ | |
141 | #define MD_CHANGE_CLEAN 1 /* transition to or from 'clean' */ | |
070dc6dd | 142 | #define MD_CHANGE_PENDING 2 /* switch from 'clean' to 'active' in progress */ |
850b2b42 | 143 | |
409c57f3 N |
144 | int suspended; |
145 | atomic_t active_io; | |
1da177e4 | 146 | int ro; |
bb4f1e9d N |
147 | int sysfs_active; /* set when sysfs deletes |
148 | * are happening, so run/ | |
149 | * takeover/stop are not safe | |
150 | */ | |
1da177e4 LT |
151 | |
152 | struct gendisk *gendisk; | |
153 | ||
eae1701f | 154 | struct kobject kobj; |
d3374825 N |
155 | int hold_active; |
156 | #define UNTIL_IOCTL 1 | |
efeb53c0 | 157 | #define UNTIL_STOP 2 |
eae1701f | 158 | |
1da177e4 LT |
159 | /* Superblock information */ |
160 | int major_version, | |
161 | minor_version, | |
162 | patch_version; | |
163 | int persistent; | |
e691063a N |
164 | int external; /* metadata is |
165 | * managed externally */ | |
166 | char metadata_type[17]; /* externally set*/ | |
9d8f0363 | 167 | int chunk_sectors; |
1da177e4 LT |
168 | time_t ctime, utime; |
169 | int level, layout; | |
d9d166c2 | 170 | char clevel[16]; |
1da177e4 LT |
171 | int raid_disks; |
172 | int max_disks; | |
58c0fed4 AN |
173 | sector_t dev_sectors; /* used size of |
174 | * component devices */ | |
f233ea5c | 175 | sector_t array_sectors; /* exported array size */ |
b522adcd DW |
176 | int external_size; /* size managed |
177 | * externally */ | |
1da177e4 | 178 | __u64 events; |
a8707c08 N |
179 | /* If the last 'event' was simply a clean->dirty transition, and |
180 | * we didn't write it to the spares, then it is safe and simple | |
181 | * to just decrement the event count on a dirty->clean transition. | |
182 | * So we record that possibility here. | |
183 | */ | |
184 | int can_decrease_events; | |
1da177e4 LT |
185 | |
186 | char uuid[16]; | |
187 | ||
f6705578 N |
188 | /* If the array is being reshaped, we need to record the |
189 | * new shape and an indication of where we are up to. | |
190 | * This is written to the superblock. | |
191 | * If reshape_position is MaxSector, then no reshape is happening (yet). | |
192 | */ | |
193 | sector_t reshape_position; | |
664e7c41 AN |
194 | int delta_disks, new_level, new_layout; |
195 | int new_chunk_sectors; | |
f6705578 | 196 | |
1da177e4 LT |
197 | struct mdk_thread_s *thread; /* management thread */ |
198 | struct mdk_thread_s *sync_thread; /* doing resync or reconstruct */ | |
ff4e8d9a | 199 | sector_t curr_resync; /* last block scheduled */ |
97e4f42d N |
200 | /* As resync requests can complete out of order, we cannot easily track |
201 | * how much resync has been completed. So we occasionally pause until | |
202 | * everything completes, then set curr_resync_completed to curr_resync. | |
203 | * As such it may be well behind the real resync mark, but it is a value | |
204 | * we are certain of. | |
205 | */ | |
206 | sector_t curr_resync_completed; | |
1da177e4 LT |
207 | unsigned long resync_mark; /* a recent timestamp */ |
208 | sector_t resync_mark_cnt;/* blocks written at resync_mark */ | |
ff4e8d9a | 209 | sector_t curr_mark_cnt; /* blocks scheduled now */ |
1da177e4 LT |
210 | |
211 | sector_t resync_max_sectors; /* may be set by personality */ | |
9d88883e N |
212 | |
213 | sector_t resync_mismatches; /* count of sectors where | |
214 | * parity/replica mismatch found | |
215 | */ | |
e464eafd N |
216 | |
217 | /* allow user-space to request suspension of IO to regions of the array */ | |
218 | sector_t suspend_lo; | |
219 | sector_t suspend_hi; | |
88202a0c N |
220 | /* if zero, use the system-wide default */ |
221 | int sync_speed_min; | |
222 | int sync_speed_max; | |
223 | ||
90b08710 BS |
224 | /* resync even though the same disks are shared among md-devices */ |
225 | int parallel_resync; | |
226 | ||
6ff8d8ec | 227 | int ok_start_degraded; |
1da177e4 LT |
228 | /* recovery/resync flags |
229 | * NEEDED: we might need to start a resync/recover | |
230 | * RUNNING: a thread is running, or about to be started | |
231 | * SYNC: actually doing a resync, not a recovery | |
72a23c21 | 232 | * RECOVER: doing recovery, or need to try it. |
dfc70645 | 233 | * INTR: resync needs to be aborted for some reason |
1da177e4 | 234 | * DONE: thread is done and is waiting to be reaped |
24dd469d | 235 | * REQUEST: user-space has requested a sync (used with SYNC) |
411c9403 | 236 | * CHECK: user-space request for check-only, no repair |
ccfcc3c1 N |
237 | * RESHAPE: A reshape is happening |
238 | * | |
239 | * If neither SYNC or RESHAPE are set, then it is a recovery. | |
1da177e4 LT |
240 | */ |
241 | #define MD_RECOVERY_RUNNING 0 | |
242 | #define MD_RECOVERY_SYNC 1 | |
72a23c21 | 243 | #define MD_RECOVERY_RECOVER 2 |
1da177e4 LT |
244 | #define MD_RECOVERY_INTR 3 |
245 | #define MD_RECOVERY_DONE 4 | |
246 | #define MD_RECOVERY_NEEDED 5 | |
24dd469d N |
247 | #define MD_RECOVERY_REQUESTED 6 |
248 | #define MD_RECOVERY_CHECK 7 | |
ccfcc3c1 | 249 | #define MD_RECOVERY_RESHAPE 8 |
5fd6c1dc N |
250 | #define MD_RECOVERY_FROZEN 9 |
251 | ||
1da177e4 | 252 | unsigned long recovery; |
4044ba58 N |
253 | int recovery_disabled; /* if we detect that recovery |
254 | * will always fail, set this | |
255 | * so we don't loop trying */ | |
1da177e4 LT |
256 | |
257 | int in_sync; /* know to not need resync */ | |
c8c00a69 N |
258 | /* 'open_mutex' avoids races between 'md_open' and 'do_md_stop', so |
259 | * that we are never stopping an array while it is open. | |
260 | * 'reconfig_mutex' protects all other reconfiguration. | |
261 | * These locks are separate due to conflicting interactions | |
262 | * with bdev->bd_mutex. | |
263 | * Lock ordering is: | |
264 | * reconfig_mutex -> bd_mutex : e.g. do_md_run -> revalidate_disk | |
265 | * bd_mutex -> open_mutex: e.g. __blkdev_get -> md_open | |
266 | */ | |
267 | struct mutex open_mutex; | |
df5b89b3 | 268 | struct mutex reconfig_mutex; |
f2ea68cf N |
269 | atomic_t active; /* general refcount */ |
270 | atomic_t openers; /* number of active opens */ | |
1da177e4 | 271 | |
1da177e4 LT |
272 | int degraded; /* whether md should consider |
273 | * adding a spare | |
274 | */ | |
275 | ||
276 | atomic_t recovery_active; /* blocks scheduled, but not written */ | |
277 | wait_queue_head_t recovery_wait; | |
278 | sector_t recovery_cp; | |
5e96ee65 NB |
279 | sector_t resync_min; /* user requested sync |
280 | * starts here */ | |
c6207277 N |
281 | sector_t resync_max; /* resync should pause |
282 | * when it gets here */ | |
06d91a5f | 283 | |
b62b7590 N |
284 | struct sysfs_dirent *sysfs_state; /* handle for 'array_state' |
285 | * file in sysfs. | |
286 | */ | |
0c3573f1 | 287 | struct sysfs_dirent *sysfs_action; /* handle for 'sync_action' */ |
b62b7590 | 288 | |
d3374825 N |
289 | struct work_struct del_work; /* used for delayed sysfs removal */ |
290 | ||
06d91a5f | 291 | spinlock_t write_lock; |
3d310eb7 | 292 | wait_queue_head_t sb_wait; /* for waiting on superblock updates */ |
7bfa19f2 | 293 | atomic_t pending_writes; /* number of active superblock writes */ |
06d91a5f | 294 | |
1da177e4 LT |
295 | unsigned int safemode; /* if set, update "clean" superblock |
296 | * when no writes pending. | |
297 | */ | |
298 | unsigned int safemode_delay; | |
299 | struct timer_list safemode_timer; | |
300 | atomic_t writes_pending; | |
165125e1 | 301 | struct request_queue *queue; /* for plugging ... */ |
1da177e4 | 302 | |
32a7627c | 303 | struct bitmap *bitmap; /* the bitmap for the device */ |
c3d9714e N |
304 | struct { |
305 | struct file *file; /* the bitmap file */ | |
f6af949c | 306 | loff_t offset; /* offset from superblock of |
c3d9714e N |
307 | * start of bitmap. May be |
308 | * negative, but not '0' | |
f6af949c N |
309 | * For external metadata, offset |
310 | * from start of device. | |
c3d9714e | 311 | */ |
f6af949c | 312 | loff_t default_offset; /* this is the offset to use when |
c3d9714e N |
313 | * hot-adding a bitmap. It should |
314 | * eventually be settable by sysfs. | |
315 | */ | |
e384e585 N |
316 | /* When md is serving under dm, it might use a |
317 | * dirty_log to store the bits. | |
318 | */ | |
319 | struct dm_dirty_log *log; | |
320 | ||
c3d9714e | 321 | struct mutex mutex; |
42a04b50 | 322 | unsigned long chunksize; |
ac2f40be | 323 | unsigned long daemon_sleep; /* how many jiffies between updates? */ |
42a04b50 | 324 | unsigned long max_write_behind; /* write-behind mode */ |
ece5cff0 | 325 | int external; |
c3d9714e | 326 | } bitmap_info; |
32a7627c | 327 | |
1e50915f | 328 | atomic_t max_corr_read_errors; /* max read retries */ |
1da177e4 | 329 | struct list_head all_mddevs; |
a2826aa9 | 330 | |
a64c876f | 331 | struct attribute_group *to_remove; |
252ac522 N |
332 | struct plug_handle *plug; /* if used by personality */ |
333 | ||
a167f663 N |
334 | struct bio_set *bio_set; |
335 | ||
e9c7469b TH |
336 | /* Generic flush handling. |
337 | * The last to finish preflush schedules a worker to submit | |
338 | * the rest of the request (without the REQ_FLUSH flag). | |
a2826aa9 | 339 | */ |
e9c7469b | 340 | struct bio *flush_bio; |
a2826aa9 | 341 | atomic_t flush_pending; |
e9c7469b | 342 | struct work_struct flush_work; |
768a418d | 343 | struct work_struct event_work; /* used by dm to report failure event */ |
1da177e4 LT |
344 | }; |
345 | ||
346 | ||
347 | static inline void rdev_dec_pending(mdk_rdev_t *rdev, mddev_t *mddev) | |
348 | { | |
b2d444d7 | 349 | int faulty = test_bit(Faulty, &rdev->flags); |
1da177e4 LT |
350 | if (atomic_dec_and_test(&rdev->nr_pending) && faulty) |
351 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
352 | } | |
353 | ||
354 | static inline void md_sync_acct(struct block_device *bdev, unsigned long nr_sectors) | |
355 | { | |
356 | atomic_add(nr_sectors, &bdev->bd_contains->bd_disk->sync_io); | |
357 | } | |
358 | ||
2604b703 | 359 | struct mdk_personality |
1da177e4 LT |
360 | { |
361 | char *name; | |
2604b703 N |
362 | int level; |
363 | struct list_head list; | |
1da177e4 | 364 | struct module *owner; |
21a52c6d | 365 | int (*make_request)(mddev_t *mddev, struct bio *bio); |
1da177e4 LT |
366 | int (*run)(mddev_t *mddev); |
367 | int (*stop)(mddev_t *mddev); | |
368 | void (*status)(struct seq_file *seq, mddev_t *mddev); | |
369 | /* error_handler must set ->faulty and clear ->in_sync | |
370 | * if appropriate, and should abort recovery if needed | |
371 | */ | |
372 | void (*error_handler)(mddev_t *mddev, mdk_rdev_t *rdev); | |
373 | int (*hot_add_disk) (mddev_t *mddev, mdk_rdev_t *rdev); | |
374 | int (*hot_remove_disk) (mddev_t *mddev, int number); | |
375 | int (*spare_active) (mddev_t *mddev); | |
57afd89f | 376 | sector_t (*sync_request)(mddev_t *mddev, sector_t sector_nr, int *skipped, int go_faster); |
1da177e4 | 377 | int (*resize) (mddev_t *mddev, sector_t sectors); |
80c3a6ce | 378 | sector_t (*size) (mddev_t *mddev, sector_t sectors, int raid_disks); |
63c70c4f N |
379 | int (*check_reshape) (mddev_t *mddev); |
380 | int (*start_reshape) (mddev_t *mddev); | |
cea9c228 | 381 | void (*finish_reshape) (mddev_t *mddev); |
36fa3063 N |
382 | /* quiesce moves between quiescence states |
383 | * 0 - fully active | |
384 | * 1 - no new requests allowed | |
385 | * others - reserved | |
386 | */ | |
387 | void (*quiesce) (mddev_t *mddev, int state); | |
245f46c2 N |
388 | /* takeover is used to transition an array from one |
389 | * personality to another. The new personality must be able | |
390 | * to handle the data in the current layout. | |
391 | * e.g. 2drive raid1 -> 2drive raid5 | |
392 | * ndrive raid5 -> degraded n+1drive raid6 with special layout | |
393 | * If the takeover succeeds, a new 'private' structure is returned. | |
394 | * This needs to be installed and then ->run used to activate the | |
395 | * array. | |
396 | */ | |
397 | void *(*takeover) (mddev_t *mddev); | |
1da177e4 LT |
398 | }; |
399 | ||
400 | ||
007583c9 N |
401 | struct md_sysfs_entry { |
402 | struct attribute attr; | |
403 | ssize_t (*show)(mddev_t *, char *); | |
404 | ssize_t (*store)(mddev_t *, const char *, size_t); | |
405 | }; | |
43a70507 | 406 | extern struct attribute_group md_bitmap_group; |
007583c9 | 407 | |
00bcb4ac N |
408 | static inline struct sysfs_dirent *sysfs_get_dirent_safe(struct sysfs_dirent *sd, char *name) |
409 | { | |
410 | if (sd) | |
411 | return sysfs_get_dirent(sd, NULL, name); | |
412 | return sd; | |
413 | } | |
414 | static inline void sysfs_notify_dirent_safe(struct sysfs_dirent *sd) | |
415 | { | |
416 | if (sd) | |
417 | sysfs_notify_dirent(sd); | |
418 | } | |
419 | ||
1da177e4 LT |
420 | static inline char * mdname (mddev_t * mddev) |
421 | { | |
422 | return mddev->gendisk ? mddev->gendisk->disk_name : "mdX"; | |
423 | } | |
424 | ||
1da177e4 LT |
425 | /* |
426 | * iterates through some rdev ringlist. It's safe to remove the | |
427 | * current 'rdev'. Dont touch 'tmp' though. | |
428 | */ | |
159ec1fc CR |
429 | #define rdev_for_each_list(rdev, tmp, head) \ |
430 | list_for_each_entry_safe(rdev, tmp, head, same_set) | |
431 | ||
1da177e4 LT |
432 | /* |
433 | * iterates through the 'same array disks' ringlist | |
434 | */ | |
d089c6af | 435 | #define rdev_for_each(rdev, tmp, mddev) \ |
159ec1fc | 436 | list_for_each_entry_safe(rdev, tmp, &((mddev)->disks), same_set) |
1da177e4 | 437 | |
4b80991c N |
438 | #define rdev_for_each_rcu(rdev, mddev) \ |
439 | list_for_each_entry_rcu(rdev, &((mddev)->disks), same_set) | |
440 | ||
1da177e4 LT |
441 | typedef struct mdk_thread_s { |
442 | void (*run) (mddev_t *mddev); | |
443 | mddev_t *mddev; | |
444 | wait_queue_head_t wqueue; | |
445 | unsigned long flags; | |
1da177e4 | 446 | struct task_struct *tsk; |
32a7627c | 447 | unsigned long timeout; |
1da177e4 LT |
448 | } mdk_thread_t; |
449 | ||
450 | #define THREAD_WAKEUP 0 | |
451 | ||
452 | #define __wait_event_lock_irq(wq, condition, lock, cmd) \ | |
453 | do { \ | |
454 | wait_queue_t __wait; \ | |
455 | init_waitqueue_entry(&__wait, current); \ | |
456 | \ | |
457 | add_wait_queue(&wq, &__wait); \ | |
458 | for (;;) { \ | |
459 | set_current_state(TASK_UNINTERRUPTIBLE); \ | |
460 | if (condition) \ | |
461 | break; \ | |
462 | spin_unlock_irq(&lock); \ | |
463 | cmd; \ | |
464 | schedule(); \ | |
465 | spin_lock_irq(&lock); \ | |
466 | } \ | |
467 | current->state = TASK_RUNNING; \ | |
468 | remove_wait_queue(&wq, &__wait); \ | |
469 | } while (0) | |
470 | ||
471 | #define wait_event_lock_irq(wq, condition, lock, cmd) \ | |
472 | do { \ | |
473 | if (condition) \ | |
474 | break; \ | |
475 | __wait_event_lock_irq(wq, condition, lock, cmd); \ | |
476 | } while (0) | |
477 | ||
1345b1d8 N |
478 | static inline void safe_put_page(struct page *p) |
479 | { | |
480 | if (p) put_page(p); | |
481 | } | |
482 | ||
92022950 N |
483 | extern int register_md_personality(struct mdk_personality *p); |
484 | extern int unregister_md_personality(struct mdk_personality *p); | |
485 | extern mdk_thread_t * md_register_thread(void (*run) (mddev_t *mddev), | |
486 | mddev_t *mddev, const char *name); | |
487 | extern void md_unregister_thread(mdk_thread_t *thread); | |
488 | extern void md_wakeup_thread(mdk_thread_t *thread); | |
489 | extern void md_check_recovery(mddev_t *mddev); | |
490 | extern void md_write_start(mddev_t *mddev, struct bio *bi); | |
491 | extern void md_write_end(mddev_t *mddev); | |
492 | extern void md_done_sync(mddev_t *mddev, int blocks, int ok); | |
493 | extern void md_error(mddev_t *mddev, mdk_rdev_t *rdev); | |
494 | ||
3fa841d7 | 495 | extern int mddev_congested(mddev_t *mddev, int bits); |
e9c7469b | 496 | extern void md_flush_request(mddev_t *mddev, struct bio *bio); |
92022950 N |
497 | extern void md_super_write(mddev_t *mddev, mdk_rdev_t *rdev, |
498 | sector_t sector, int size, struct page *page); | |
499 | extern void md_super_wait(mddev_t *mddev); | |
2b193363 | 500 | extern int sync_page_io(mdk_rdev_t *rdev, sector_t sector, int size, |
92022950 N |
501 | struct page *page, int rw); |
502 | extern void md_do_sync(mddev_t *mddev); | |
503 | extern void md_new_event(mddev_t *mddev); | |
504 | extern int md_allow_write(mddev_t *mddev); | |
505 | extern void md_wait_for_blocked_rdev(mdk_rdev_t *rdev, mddev_t *mddev); | |
1f403624 | 506 | extern void md_set_array_sectors(mddev_t *mddev, sector_t array_sectors); |
0894cc30 | 507 | extern int md_check_no_bitmap(mddev_t *mddev); |
ac5e7113 | 508 | extern int md_integrity_register(mddev_t *mddev); |
72e02075 N |
509 | extern void md_integrity_add_rdev(mdk_rdev_t *rdev, mddev_t *mddev); |
510 | extern int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale); | |
43a70507 | 511 | extern void restore_bitmap_write_access(struct file *file); |
b63d7c2e | 512 | extern void md_unplug(mddev_t *mddev); |
63fe0817 | 513 | |
390ee602 N |
514 | extern void mddev_init(mddev_t *mddev); |
515 | extern int md_run(mddev_t *mddev); | |
516 | extern void md_stop(mddev_t *mddev); | |
517 | extern void md_stop_writes(mddev_t *mddev); | |
e8bb9a83 | 518 | extern void md_rdev_init(mdk_rdev_t *rdev); |
63fe0817 | 519 | |
390ee602 N |
520 | extern void mddev_suspend(mddev_t *mddev); |
521 | extern void mddev_resume(mddev_t *mddev); | |
a167f663 N |
522 | extern struct bio *bio_clone_mddev(struct bio *bio, gfp_t gfp_mask, |
523 | mddev_t *mddev); | |
524 | extern struct bio *bio_alloc_mddev(gfp_t gfp_mask, int nr_iovecs, | |
525 | mddev_t *mddev); | |
63fe0817 | 526 | #endif /* _MD_MD_H */ |