Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | md.c : Multiple Devices driver for Linux | |
f72ffdd6 | 3 | Copyright (C) 1998, 1999, 2000 Ingo Molnar |
1da177e4 LT |
4 | |
5 | completely rewritten, based on the MD driver code from Marc Zyngier | |
6 | ||
7 | Changes: | |
8 | ||
9 | - RAID-1/RAID-5 extensions by Miguel de Icaza, Gadi Oxman, Ingo Molnar | |
10 | - RAID-6 extensions by H. Peter Anvin <hpa@zytor.com> | |
11 | - boot support for linear and striped mode by Harald Hoyer <HarryH@Royal.Net> | |
12 | - kerneld support by Boris Tobotras <boris@xtalk.msk.su> | |
13 | - kmod support by: Cyrus Durgin | |
14 | - RAID0 bugfixes: Mark Anthony Lisher <markal@iname.com> | |
15 | - Devfs support by Richard Gooch <rgooch@atnf.csiro.au> | |
16 | ||
17 | - lots of fixes and improvements to the RAID1/RAID5 and generic | |
18 | RAID code (such as request based resynchronization): | |
19 | ||
20 | Neil Brown <neilb@cse.unsw.edu.au>. | |
21 | ||
32a7627c N |
22 | - persistent bitmap code |
23 | Copyright (C) 2003-2004, Paul Clements, SteelEye Technology, Inc. | |
24 | ||
1da177e4 LT |
25 | This program is free software; you can redistribute it and/or modify |
26 | it under the terms of the GNU General Public License as published by | |
27 | the Free Software Foundation; either version 2, or (at your option) | |
28 | any later version. | |
29 | ||
30 | You should have received a copy of the GNU General Public License | |
31 | (for example /usr/src/linux/COPYING); if not, write to the Free | |
32 | Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
33 | */ | |
34 | ||
a6fb0934 | 35 | #include <linux/kthread.h> |
bff61975 | 36 | #include <linux/blkdev.h> |
fc974ee2 | 37 | #include <linux/badblocks.h> |
1da177e4 | 38 | #include <linux/sysctl.h> |
bff61975 | 39 | #include <linux/seq_file.h> |
ff01bb48 | 40 | #include <linux/fs.h> |
d7603b7e | 41 | #include <linux/poll.h> |
16f17b39 | 42 | #include <linux/ctype.h> |
e7d2860b | 43 | #include <linux/string.h> |
fb4d8c76 N |
44 | #include <linux/hdreg.h> |
45 | #include <linux/proc_fs.h> | |
46 | #include <linux/random.h> | |
056075c7 | 47 | #include <linux/module.h> |
fb4d8c76 | 48 | #include <linux/reboot.h> |
32a7627c | 49 | #include <linux/file.h> |
aa98aa31 | 50 | #include <linux/compat.h> |
25570727 | 51 | #include <linux/delay.h> |
bff61975 N |
52 | #include <linux/raid/md_p.h> |
53 | #include <linux/raid/md_u.h> | |
5a0e3ad6 | 54 | #include <linux/slab.h> |
43b2e5d8 | 55 | #include "md.h" |
ef740c37 | 56 | #include "bitmap.h" |
edb39c9d | 57 | #include "md-cluster.h" |
1da177e4 | 58 | |
1da177e4 | 59 | #ifndef MODULE |
d710e138 | 60 | static void autostart_arrays(int part); |
1da177e4 LT |
61 | #endif |
62 | ||
01f96c0a N |
63 | /* pers_list is a list of registered personalities protected |
64 | * by pers_lock. | |
65 | * pers_lock does extra service to protect accesses to | |
66 | * mddev->thread when the mutex cannot be held. | |
67 | */ | |
2604b703 | 68 | static LIST_HEAD(pers_list); |
1da177e4 LT |
69 | static DEFINE_SPINLOCK(pers_lock); |
70 | ||
edb39c9d | 71 | struct md_cluster_operations *md_cluster_ops; |
589a1c49 | 72 | EXPORT_SYMBOL(md_cluster_ops); |
edb39c9d GR |
73 | struct module *md_cluster_mod; |
74 | EXPORT_SYMBOL(md_cluster_mod); | |
75 | ||
90b08710 | 76 | static DECLARE_WAIT_QUEUE_HEAD(resync_wait); |
e804ac78 TH |
77 | static struct workqueue_struct *md_wq; |
78 | static struct workqueue_struct *md_misc_wq; | |
90b08710 | 79 | |
746d3207 N |
80 | static int remove_and_add_spares(struct mddev *mddev, |
81 | struct md_rdev *this); | |
5aa61f42 | 82 | static void mddev_detach(struct mddev *mddev); |
746d3207 | 83 | |
1e50915f RB |
84 | /* |
85 | * Default number of read corrections we'll attempt on an rdev | |
86 | * before ejecting it from the array. We divide the read error | |
87 | * count by 2 for every hour elapsed between read errors. | |
88 | */ | |
89 | #define MD_DEFAULT_MAX_CORRECTED_READ_ERRORS 20 | |
1da177e4 LT |
90 | /* |
91 | * Current RAID-1,4,5 parallel reconstruction 'guaranteed speed limit' | |
92 | * is 1000 KB/sec, so the extra system load does not show up that much. | |
93 | * Increase it if you want to have more _guaranteed_ speed. Note that | |
338cec32 | 94 | * the RAID driver will use the maximum available bandwidth if the IO |
1da177e4 LT |
95 | * subsystem is idle. There is also an 'absolute maximum' reconstruction |
96 | * speed limit - in case reconstruction slows down your system despite | |
97 | * idle IO detection. | |
98 | * | |
99 | * you can change it via /proc/sys/dev/raid/speed_limit_min and _max. | |
88202a0c | 100 | * or /sys/block/mdX/md/sync_speed_{min,max} |
1da177e4 LT |
101 | */ |
102 | ||
103 | static int sysctl_speed_limit_min = 1000; | |
104 | static int sysctl_speed_limit_max = 200000; | |
fd01b88c | 105 | static inline int speed_min(struct mddev *mddev) |
88202a0c N |
106 | { |
107 | return mddev->sync_speed_min ? | |
108 | mddev->sync_speed_min : sysctl_speed_limit_min; | |
109 | } | |
110 | ||
fd01b88c | 111 | static inline int speed_max(struct mddev *mddev) |
88202a0c N |
112 | { |
113 | return mddev->sync_speed_max ? | |
114 | mddev->sync_speed_max : sysctl_speed_limit_max; | |
115 | } | |
1da177e4 LT |
116 | |
117 | static struct ctl_table_header *raid_table_header; | |
118 | ||
82592c38 | 119 | static struct ctl_table raid_table[] = { |
1da177e4 | 120 | { |
1da177e4 LT |
121 | .procname = "speed_limit_min", |
122 | .data = &sysctl_speed_limit_min, | |
123 | .maxlen = sizeof(int), | |
80ca3a44 | 124 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 125 | .proc_handler = proc_dointvec, |
1da177e4 LT |
126 | }, |
127 | { | |
1da177e4 LT |
128 | .procname = "speed_limit_max", |
129 | .data = &sysctl_speed_limit_max, | |
130 | .maxlen = sizeof(int), | |
80ca3a44 | 131 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 132 | .proc_handler = proc_dointvec, |
1da177e4 | 133 | }, |
894d2491 | 134 | { } |
1da177e4 LT |
135 | }; |
136 | ||
82592c38 | 137 | static struct ctl_table raid_dir_table[] = { |
1da177e4 | 138 | { |
1da177e4 LT |
139 | .procname = "raid", |
140 | .maxlen = 0, | |
80ca3a44 | 141 | .mode = S_IRUGO|S_IXUGO, |
1da177e4 LT |
142 | .child = raid_table, |
143 | }, | |
894d2491 | 144 | { } |
1da177e4 LT |
145 | }; |
146 | ||
82592c38 | 147 | static struct ctl_table raid_root_table[] = { |
1da177e4 | 148 | { |
1da177e4 LT |
149 | .procname = "dev", |
150 | .maxlen = 0, | |
151 | .mode = 0555, | |
152 | .child = raid_dir_table, | |
153 | }, | |
894d2491 | 154 | { } |
1da177e4 LT |
155 | }; |
156 | ||
83d5cde4 | 157 | static const struct block_device_operations md_fops; |
1da177e4 | 158 | |
f91de92e N |
159 | static int start_readonly; |
160 | ||
a167f663 N |
161 | /* bio_clone_mddev |
162 | * like bio_clone, but with a local bio set | |
163 | */ | |
164 | ||
a167f663 | 165 | struct bio *bio_alloc_mddev(gfp_t gfp_mask, int nr_iovecs, |
fd01b88c | 166 | struct mddev *mddev) |
a167f663 N |
167 | { |
168 | struct bio *b; | |
a167f663 N |
169 | |
170 | if (!mddev || !mddev->bio_set) | |
171 | return bio_alloc(gfp_mask, nr_iovecs); | |
172 | ||
395c72a7 | 173 | b = bio_alloc_bioset(gfp_mask, nr_iovecs, mddev->bio_set); |
a167f663 N |
174 | if (!b) |
175 | return NULL; | |
a167f663 N |
176 | return b; |
177 | } | |
178 | EXPORT_SYMBOL_GPL(bio_alloc_mddev); | |
179 | ||
180 | struct bio *bio_clone_mddev(struct bio *bio, gfp_t gfp_mask, | |
fd01b88c | 181 | struct mddev *mddev) |
a167f663 | 182 | { |
a167f663 N |
183 | if (!mddev || !mddev->bio_set) |
184 | return bio_clone(bio, gfp_mask); | |
185 | ||
bf800ef1 | 186 | return bio_clone_bioset(bio, gfp_mask, mddev->bio_set); |
a167f663 N |
187 | } |
188 | EXPORT_SYMBOL_GPL(bio_clone_mddev); | |
189 | ||
d7603b7e N |
190 | /* |
191 | * We have a system wide 'event count' that is incremented | |
192 | * on any 'interesting' event, and readers of /proc/mdstat | |
193 | * can use 'poll' or 'select' to find out when the event | |
194 | * count increases. | |
195 | * | |
196 | * Events are: | |
197 | * start array, stop array, error, add device, remove device, | |
198 | * start build, activate spare | |
199 | */ | |
2989ddbd | 200 | static DECLARE_WAIT_QUEUE_HEAD(md_event_waiters); |
d7603b7e | 201 | static atomic_t md_event_count; |
fd01b88c | 202 | void md_new_event(struct mddev *mddev) |
d7603b7e N |
203 | { |
204 | atomic_inc(&md_event_count); | |
205 | wake_up(&md_event_waiters); | |
206 | } | |
29269553 | 207 | EXPORT_SYMBOL_GPL(md_new_event); |
d7603b7e | 208 | |
1da177e4 LT |
209 | /* |
210 | * Enables to iterate over all existing md arrays | |
211 | * all_mddevs_lock protects this list. | |
212 | */ | |
213 | static LIST_HEAD(all_mddevs); | |
214 | static DEFINE_SPINLOCK(all_mddevs_lock); | |
215 | ||
1da177e4 LT |
216 | /* |
217 | * iterates through all used mddevs in the system. | |
218 | * We take care to grab the all_mddevs_lock whenever navigating | |
219 | * the list, and to always hold a refcount when unlocked. | |
220 | * Any code which breaks out of this loop while own | |
221 | * a reference to the current mddev and must mddev_put it. | |
222 | */ | |
fd01b88c | 223 | #define for_each_mddev(_mddev,_tmp) \ |
1da177e4 | 224 | \ |
f72ffdd6 | 225 | for (({ spin_lock(&all_mddevs_lock); \ |
fd01b88c N |
226 | _tmp = all_mddevs.next; \ |
227 | _mddev = NULL;}); \ | |
228 | ({ if (_tmp != &all_mddevs) \ | |
229 | mddev_get(list_entry(_tmp, struct mddev, all_mddevs));\ | |
1da177e4 | 230 | spin_unlock(&all_mddevs_lock); \ |
fd01b88c N |
231 | if (_mddev) mddev_put(_mddev); \ |
232 | _mddev = list_entry(_tmp, struct mddev, all_mddevs); \ | |
233 | _tmp != &all_mddevs;}); \ | |
1da177e4 | 234 | ({ spin_lock(&all_mddevs_lock); \ |
fd01b88c | 235 | _tmp = _tmp->next;}) \ |
1da177e4 LT |
236 | ) |
237 | ||
409c57f3 N |
238 | /* Rather than calling directly into the personality make_request function, |
239 | * IO requests come here first so that we can check if the device is | |
240 | * being suspended pending a reconfiguration. | |
241 | * We hold a refcount over the call to ->make_request. By the time that | |
242 | * call has finished, the bio has been linked into some internal structure | |
243 | * and so is visible to ->quiesce(), so we don't need the refcount any more. | |
244 | */ | |
dece1635 | 245 | static blk_qc_t md_make_request(struct request_queue *q, struct bio *bio) |
1da177e4 | 246 | { |
49077326 | 247 | const int rw = bio_data_dir(bio); |
fd01b88c | 248 | struct mddev *mddev = q->queuedata; |
e91ece55 | 249 | unsigned int sectors; |
74672d06 | 250 | int cpu; |
49077326 | 251 | |
54efd50b KO |
252 | blk_queue_split(q, &bio, q->bio_split); |
253 | ||
274d8cbd | 254 | if (mddev == NULL || mddev->pers == NULL) { |
409c57f3 | 255 | bio_io_error(bio); |
dece1635 | 256 | return BLK_QC_T_NONE; |
409c57f3 | 257 | } |
bbfa57c0 | 258 | if (mddev->ro == 1 && unlikely(rw == WRITE)) { |
4246a0b6 CH |
259 | if (bio_sectors(bio) != 0) |
260 | bio->bi_error = -EROFS; | |
261 | bio_endio(bio); | |
dece1635 | 262 | return BLK_QC_T_NONE; |
bbfa57c0 | 263 | } |
0ca69886 | 264 | smp_rmb(); /* Ensure implications of 'active' are visible */ |
409c57f3 | 265 | rcu_read_lock(); |
e9c7469b | 266 | if (mddev->suspended) { |
409c57f3 N |
267 | DEFINE_WAIT(__wait); |
268 | for (;;) { | |
269 | prepare_to_wait(&mddev->sb_wait, &__wait, | |
270 | TASK_UNINTERRUPTIBLE); | |
e9c7469b | 271 | if (!mddev->suspended) |
409c57f3 N |
272 | break; |
273 | rcu_read_unlock(); | |
274 | schedule(); | |
275 | rcu_read_lock(); | |
276 | } | |
277 | finish_wait(&mddev->sb_wait, &__wait); | |
278 | } | |
279 | atomic_inc(&mddev->active_io); | |
280 | rcu_read_unlock(); | |
49077326 | 281 | |
e91ece55 CM |
282 | /* |
283 | * save the sectors now since our bio can | |
284 | * go away inside make_request | |
285 | */ | |
286 | sectors = bio_sectors(bio); | |
5a7bbad2 | 287 | mddev->pers->make_request(mddev, bio); |
49077326 | 288 | |
74672d06 GZ |
289 | cpu = part_stat_lock(); |
290 | part_stat_inc(cpu, &mddev->gendisk->part0, ios[rw]); | |
291 | part_stat_add(cpu, &mddev->gendisk->part0, sectors[rw], sectors); | |
292 | part_stat_unlock(); | |
49077326 | 293 | |
409c57f3 N |
294 | if (atomic_dec_and_test(&mddev->active_io) && mddev->suspended) |
295 | wake_up(&mddev->sb_wait); | |
dece1635 JA |
296 | |
297 | return BLK_QC_T_NONE; | |
409c57f3 N |
298 | } |
299 | ||
9e35b99c N |
300 | /* mddev_suspend makes sure no new requests are submitted |
301 | * to the device, and that any requests that have been submitted | |
302 | * are completely handled. | |
afa0f557 N |
303 | * Once mddev_detach() is called and completes, the module will be |
304 | * completely unused. | |
9e35b99c | 305 | */ |
fd01b88c | 306 | void mddev_suspend(struct mddev *mddev) |
409c57f3 | 307 | { |
70d9798b | 308 | WARN_ON_ONCE(current == mddev->thread->tsk); |
0dc10e50 MP |
309 | if (mddev->suspended++) |
310 | return; | |
409c57f3 N |
311 | synchronize_rcu(); |
312 | wait_event(mddev->sb_wait, atomic_read(&mddev->active_io) == 0); | |
313 | mddev->pers->quiesce(mddev, 1); | |
0d9f4f13 JB |
314 | |
315 | del_timer_sync(&mddev->safemode_timer); | |
409c57f3 | 316 | } |
390ee602 | 317 | EXPORT_SYMBOL_GPL(mddev_suspend); |
409c57f3 | 318 | |
fd01b88c | 319 | void mddev_resume(struct mddev *mddev) |
409c57f3 | 320 | { |
0dc10e50 MP |
321 | if (--mddev->suspended) |
322 | return; | |
409c57f3 N |
323 | wake_up(&mddev->sb_wait); |
324 | mddev->pers->quiesce(mddev, 0); | |
0fd018af | 325 | |
47525e59 | 326 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
0fd018af JB |
327 | md_wakeup_thread(mddev->thread); |
328 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
1da177e4 | 329 | } |
390ee602 | 330 | EXPORT_SYMBOL_GPL(mddev_resume); |
1da177e4 | 331 | |
fd01b88c | 332 | int mddev_congested(struct mddev *mddev, int bits) |
3fa841d7 | 333 | { |
5c675f83 N |
334 | struct md_personality *pers = mddev->pers; |
335 | int ret = 0; | |
336 | ||
337 | rcu_read_lock(); | |
338 | if (mddev->suspended) | |
339 | ret = 1; | |
340 | else if (pers && pers->congested) | |
341 | ret = pers->congested(mddev, bits); | |
342 | rcu_read_unlock(); | |
343 | return ret; | |
344 | } | |
345 | EXPORT_SYMBOL_GPL(mddev_congested); | |
346 | static int md_congested(void *data, int bits) | |
347 | { | |
348 | struct mddev *mddev = data; | |
349 | return mddev_congested(mddev, bits); | |
3fa841d7 | 350 | } |
3fa841d7 | 351 | |
a2826aa9 | 352 | /* |
e9c7469b | 353 | * Generic flush handling for md |
a2826aa9 N |
354 | */ |
355 | ||
4246a0b6 | 356 | static void md_end_flush(struct bio *bio) |
a2826aa9 | 357 | { |
3cb03002 | 358 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 359 | struct mddev *mddev = rdev->mddev; |
a2826aa9 N |
360 | |
361 | rdev_dec_pending(rdev, mddev); | |
362 | ||
363 | if (atomic_dec_and_test(&mddev->flush_pending)) { | |
e9c7469b | 364 | /* The pre-request flush has finished */ |
e804ac78 | 365 | queue_work(md_wq, &mddev->flush_work); |
a2826aa9 N |
366 | } |
367 | bio_put(bio); | |
368 | } | |
369 | ||
a7a07e69 N |
370 | static void md_submit_flush_data(struct work_struct *ws); |
371 | ||
a035fc3e | 372 | static void submit_flushes(struct work_struct *ws) |
a2826aa9 | 373 | { |
fd01b88c | 374 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); |
3cb03002 | 375 | struct md_rdev *rdev; |
a2826aa9 | 376 | |
a7a07e69 N |
377 | INIT_WORK(&mddev->flush_work, md_submit_flush_data); |
378 | atomic_set(&mddev->flush_pending, 1); | |
a2826aa9 | 379 | rcu_read_lock(); |
dafb20fa | 380 | rdev_for_each_rcu(rdev, mddev) |
a2826aa9 N |
381 | if (rdev->raid_disk >= 0 && |
382 | !test_bit(Faulty, &rdev->flags)) { | |
383 | /* Take two references, one is dropped | |
384 | * when request finishes, one after | |
385 | * we reclaim rcu_read_lock | |
386 | */ | |
387 | struct bio *bi; | |
388 | atomic_inc(&rdev->nr_pending); | |
389 | atomic_inc(&rdev->nr_pending); | |
390 | rcu_read_unlock(); | |
b5e1b8ce | 391 | bi = bio_alloc_mddev(GFP_NOIO, 0, mddev); |
e9c7469b | 392 | bi->bi_end_io = md_end_flush; |
a2826aa9 N |
393 | bi->bi_private = rdev; |
394 | bi->bi_bdev = rdev->bdev; | |
395 | atomic_inc(&mddev->flush_pending); | |
e9c7469b | 396 | submit_bio(WRITE_FLUSH, bi); |
a2826aa9 N |
397 | rcu_read_lock(); |
398 | rdev_dec_pending(rdev, mddev); | |
399 | } | |
400 | rcu_read_unlock(); | |
a7a07e69 N |
401 | if (atomic_dec_and_test(&mddev->flush_pending)) |
402 | queue_work(md_wq, &mddev->flush_work); | |
a2826aa9 N |
403 | } |
404 | ||
e9c7469b | 405 | static void md_submit_flush_data(struct work_struct *ws) |
a2826aa9 | 406 | { |
fd01b88c | 407 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); |
e9c7469b | 408 | struct bio *bio = mddev->flush_bio; |
a2826aa9 | 409 | |
4f024f37 | 410 | if (bio->bi_iter.bi_size == 0) |
a2826aa9 | 411 | /* an empty barrier - all done */ |
4246a0b6 | 412 | bio_endio(bio); |
a2826aa9 | 413 | else { |
e9c7469b | 414 | bio->bi_rw &= ~REQ_FLUSH; |
5a7bbad2 | 415 | mddev->pers->make_request(mddev, bio); |
a2826aa9 | 416 | } |
2b74e12e N |
417 | |
418 | mddev->flush_bio = NULL; | |
419 | wake_up(&mddev->sb_wait); | |
a2826aa9 N |
420 | } |
421 | ||
fd01b88c | 422 | void md_flush_request(struct mddev *mddev, struct bio *bio) |
a2826aa9 | 423 | { |
85572d7c | 424 | spin_lock_irq(&mddev->lock); |
a2826aa9 | 425 | wait_event_lock_irq(mddev->sb_wait, |
e9c7469b | 426 | !mddev->flush_bio, |
85572d7c | 427 | mddev->lock); |
e9c7469b | 428 | mddev->flush_bio = bio; |
85572d7c | 429 | spin_unlock_irq(&mddev->lock); |
a2826aa9 | 430 | |
a035fc3e N |
431 | INIT_WORK(&mddev->flush_work, submit_flushes); |
432 | queue_work(md_wq, &mddev->flush_work); | |
a2826aa9 | 433 | } |
e9c7469b | 434 | EXPORT_SYMBOL(md_flush_request); |
409c57f3 | 435 | |
74018dc3 | 436 | void md_unplug(struct blk_plug_cb *cb, bool from_schedule) |
97658cdd | 437 | { |
9cbb1750 N |
438 | struct mddev *mddev = cb->data; |
439 | md_wakeup_thread(mddev->thread); | |
440 | kfree(cb); | |
97658cdd | 441 | } |
9cbb1750 | 442 | EXPORT_SYMBOL(md_unplug); |
2ac87401 | 443 | |
fd01b88c | 444 | static inline struct mddev *mddev_get(struct mddev *mddev) |
1da177e4 LT |
445 | { |
446 | atomic_inc(&mddev->active); | |
447 | return mddev; | |
448 | } | |
449 | ||
5fd3a17e | 450 | static void mddev_delayed_delete(struct work_struct *ws); |
d3374825 | 451 | |
fd01b88c | 452 | static void mddev_put(struct mddev *mddev) |
1da177e4 | 453 | { |
a167f663 N |
454 | struct bio_set *bs = NULL; |
455 | ||
1da177e4 LT |
456 | if (!atomic_dec_and_lock(&mddev->active, &all_mddevs_lock)) |
457 | return; | |
d3374825 | 458 | if (!mddev->raid_disks && list_empty(&mddev->disks) && |
cbd19983 N |
459 | mddev->ctime == 0 && !mddev->hold_active) { |
460 | /* Array is not configured at all, and not held active, | |
461 | * so destroy it */ | |
af8a2434 | 462 | list_del_init(&mddev->all_mddevs); |
a167f663 N |
463 | bs = mddev->bio_set; |
464 | mddev->bio_set = NULL; | |
d3374825 | 465 | if (mddev->gendisk) { |
e804ac78 TH |
466 | /* We did a probe so need to clean up. Call |
467 | * queue_work inside the spinlock so that | |
468 | * flush_workqueue() after mddev_find will | |
469 | * succeed in waiting for the work to be done. | |
d3374825 N |
470 | */ |
471 | INIT_WORK(&mddev->del_work, mddev_delayed_delete); | |
e804ac78 | 472 | queue_work(md_misc_wq, &mddev->del_work); |
d3374825 N |
473 | } else |
474 | kfree(mddev); | |
475 | } | |
476 | spin_unlock(&all_mddevs_lock); | |
a167f663 N |
477 | if (bs) |
478 | bioset_free(bs); | |
1da177e4 LT |
479 | } |
480 | ||
25b2edfa SL |
481 | static void md_safemode_timeout(unsigned long data); |
482 | ||
fd01b88c | 483 | void mddev_init(struct mddev *mddev) |
fafd7fb0 N |
484 | { |
485 | mutex_init(&mddev->open_mutex); | |
486 | mutex_init(&mddev->reconfig_mutex); | |
487 | mutex_init(&mddev->bitmap_info.mutex); | |
488 | INIT_LIST_HEAD(&mddev->disks); | |
489 | INIT_LIST_HEAD(&mddev->all_mddevs); | |
25b2edfa SL |
490 | setup_timer(&mddev->safemode_timer, md_safemode_timeout, |
491 | (unsigned long) mddev); | |
fafd7fb0 N |
492 | atomic_set(&mddev->active, 1); |
493 | atomic_set(&mddev->openers, 0); | |
494 | atomic_set(&mddev->active_io, 0); | |
85572d7c | 495 | spin_lock_init(&mddev->lock); |
fafd7fb0 N |
496 | atomic_set(&mddev->flush_pending, 0); |
497 | init_waitqueue_head(&mddev->sb_wait); | |
498 | init_waitqueue_head(&mddev->recovery_wait); | |
499 | mddev->reshape_position = MaxSector; | |
2c810cdd | 500 | mddev->reshape_backwards = 0; |
c4a39551 | 501 | mddev->last_sync_action = "none"; |
fafd7fb0 N |
502 | mddev->resync_min = 0; |
503 | mddev->resync_max = MaxSector; | |
504 | mddev->level = LEVEL_NONE; | |
505 | } | |
390ee602 | 506 | EXPORT_SYMBOL_GPL(mddev_init); |
fafd7fb0 | 507 | |
f72ffdd6 | 508 | static struct mddev *mddev_find(dev_t unit) |
1da177e4 | 509 | { |
fd01b88c | 510 | struct mddev *mddev, *new = NULL; |
1da177e4 | 511 | |
8f5f02c4 N |
512 | if (unit && MAJOR(unit) != MD_MAJOR) |
513 | unit &= ~((1<<MdpMinorShift)-1); | |
514 | ||
1da177e4 LT |
515 | retry: |
516 | spin_lock(&all_mddevs_lock); | |
efeb53c0 N |
517 | |
518 | if (unit) { | |
519 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
520 | if (mddev->unit == unit) { | |
521 | mddev_get(mddev); | |
522 | spin_unlock(&all_mddevs_lock); | |
523 | kfree(new); | |
524 | return mddev; | |
525 | } | |
526 | ||
527 | if (new) { | |
528 | list_add(&new->all_mddevs, &all_mddevs); | |
1da177e4 | 529 | spin_unlock(&all_mddevs_lock); |
efeb53c0 N |
530 | new->hold_active = UNTIL_IOCTL; |
531 | return new; | |
1da177e4 | 532 | } |
efeb53c0 N |
533 | } else if (new) { |
534 | /* find an unused unit number */ | |
535 | static int next_minor = 512; | |
536 | int start = next_minor; | |
537 | int is_free = 0; | |
538 | int dev = 0; | |
539 | while (!is_free) { | |
540 | dev = MKDEV(MD_MAJOR, next_minor); | |
541 | next_minor++; | |
542 | if (next_minor > MINORMASK) | |
543 | next_minor = 0; | |
544 | if (next_minor == start) { | |
545 | /* Oh dear, all in use. */ | |
546 | spin_unlock(&all_mddevs_lock); | |
547 | kfree(new); | |
548 | return NULL; | |
549 | } | |
f72ffdd6 | 550 | |
efeb53c0 N |
551 | is_free = 1; |
552 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
553 | if (mddev->unit == dev) { | |
554 | is_free = 0; | |
555 | break; | |
556 | } | |
557 | } | |
558 | new->unit = dev; | |
559 | new->md_minor = MINOR(dev); | |
560 | new->hold_active = UNTIL_STOP; | |
1da177e4 LT |
561 | list_add(&new->all_mddevs, &all_mddevs); |
562 | spin_unlock(&all_mddevs_lock); | |
563 | return new; | |
564 | } | |
565 | spin_unlock(&all_mddevs_lock); | |
566 | ||
9ffae0cf | 567 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
1da177e4 LT |
568 | if (!new) |
569 | return NULL; | |
570 | ||
1da177e4 LT |
571 | new->unit = unit; |
572 | if (MAJOR(unit) == MD_MAJOR) | |
573 | new->md_minor = MINOR(unit); | |
574 | else | |
575 | new->md_minor = MINOR(unit) >> MdpMinorShift; | |
576 | ||
fafd7fb0 | 577 | mddev_init(new); |
1da177e4 | 578 | |
1da177e4 LT |
579 | goto retry; |
580 | } | |
581 | ||
b6eb127d N |
582 | static struct attribute_group md_redundancy_group; |
583 | ||
5c47daf6 | 584 | void mddev_unlock(struct mddev *mddev) |
1da177e4 | 585 | { |
a64c876f | 586 | if (mddev->to_remove) { |
b6eb127d N |
587 | /* These cannot be removed under reconfig_mutex as |
588 | * an access to the files will try to take reconfig_mutex | |
589 | * while holding the file unremovable, which leads to | |
590 | * a deadlock. | |
bb4f1e9d N |
591 | * So hold set sysfs_active while the remove in happeing, |
592 | * and anything else which might set ->to_remove or my | |
593 | * otherwise change the sysfs namespace will fail with | |
594 | * -EBUSY if sysfs_active is still set. | |
595 | * We set sysfs_active under reconfig_mutex and elsewhere | |
596 | * test it under the same mutex to ensure its correct value | |
597 | * is seen. | |
b6eb127d | 598 | */ |
a64c876f N |
599 | struct attribute_group *to_remove = mddev->to_remove; |
600 | mddev->to_remove = NULL; | |
bb4f1e9d | 601 | mddev->sysfs_active = 1; |
b6eb127d N |
602 | mutex_unlock(&mddev->reconfig_mutex); |
603 | ||
00bcb4ac N |
604 | if (mddev->kobj.sd) { |
605 | if (to_remove != &md_redundancy_group) | |
606 | sysfs_remove_group(&mddev->kobj, to_remove); | |
607 | if (mddev->pers == NULL || | |
608 | mddev->pers->sync_request == NULL) { | |
609 | sysfs_remove_group(&mddev->kobj, &md_redundancy_group); | |
610 | if (mddev->sysfs_action) | |
611 | sysfs_put(mddev->sysfs_action); | |
612 | mddev->sysfs_action = NULL; | |
613 | } | |
a64c876f | 614 | } |
bb4f1e9d | 615 | mddev->sysfs_active = 0; |
b6eb127d N |
616 | } else |
617 | mutex_unlock(&mddev->reconfig_mutex); | |
1da177e4 | 618 | |
751e67ca CD |
619 | /* As we've dropped the mutex we need a spinlock to |
620 | * make sure the thread doesn't disappear | |
01f96c0a N |
621 | */ |
622 | spin_lock(&pers_lock); | |
005eca5e | 623 | md_wakeup_thread(mddev->thread); |
01f96c0a | 624 | spin_unlock(&pers_lock); |
1da177e4 | 625 | } |
5c47daf6 | 626 | EXPORT_SYMBOL_GPL(mddev_unlock); |
1da177e4 | 627 | |
57d051dc | 628 | struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr) |
1ca69c4b N |
629 | { |
630 | struct md_rdev *rdev; | |
631 | ||
632 | rdev_for_each_rcu(rdev, mddev) | |
633 | if (rdev->desc_nr == nr) | |
634 | return rdev; | |
635 | ||
636 | return NULL; | |
637 | } | |
57d051dc | 638 | EXPORT_SYMBOL_GPL(md_find_rdev_nr_rcu); |
1ca69c4b N |
639 | |
640 | static struct md_rdev *find_rdev(struct mddev *mddev, dev_t dev) | |
1da177e4 | 641 | { |
3cb03002 | 642 | struct md_rdev *rdev; |
1da177e4 | 643 | |
dafb20fa | 644 | rdev_for_each(rdev, mddev) |
1da177e4 LT |
645 | if (rdev->bdev->bd_dev == dev) |
646 | return rdev; | |
159ec1fc | 647 | |
1da177e4 LT |
648 | return NULL; |
649 | } | |
650 | ||
1ca69c4b N |
651 | static struct md_rdev *find_rdev_rcu(struct mddev *mddev, dev_t dev) |
652 | { | |
653 | struct md_rdev *rdev; | |
654 | ||
655 | rdev_for_each_rcu(rdev, mddev) | |
656 | if (rdev->bdev->bd_dev == dev) | |
657 | return rdev; | |
658 | ||
659 | return NULL; | |
660 | } | |
661 | ||
84fc4b56 | 662 | static struct md_personality *find_pers(int level, char *clevel) |
2604b703 | 663 | { |
84fc4b56 | 664 | struct md_personality *pers; |
d9d166c2 N |
665 | list_for_each_entry(pers, &pers_list, list) { |
666 | if (level != LEVEL_NONE && pers->level == level) | |
2604b703 | 667 | return pers; |
d9d166c2 N |
668 | if (strcmp(pers->name, clevel)==0) |
669 | return pers; | |
670 | } | |
2604b703 N |
671 | return NULL; |
672 | } | |
673 | ||
b73df2d3 | 674 | /* return the offset of the super block in 512byte sectors */ |
3cb03002 | 675 | static inline sector_t calc_dev_sboffset(struct md_rdev *rdev) |
1da177e4 | 676 | { |
57b2caa3 | 677 | sector_t num_sectors = i_size_read(rdev->bdev->bd_inode) / 512; |
b73df2d3 | 678 | return MD_NEW_SIZE_SECTORS(num_sectors); |
1da177e4 LT |
679 | } |
680 | ||
f72ffdd6 | 681 | static int alloc_disk_sb(struct md_rdev *rdev) |
1da177e4 | 682 | { |
1da177e4 LT |
683 | rdev->sb_page = alloc_page(GFP_KERNEL); |
684 | if (!rdev->sb_page) { | |
685 | printk(KERN_ALERT "md: out of memory.\n"); | |
ebc24337 | 686 | return -ENOMEM; |
1da177e4 LT |
687 | } |
688 | ||
689 | return 0; | |
690 | } | |
691 | ||
545c8795 | 692 | void md_rdev_clear(struct md_rdev *rdev) |
1da177e4 LT |
693 | { |
694 | if (rdev->sb_page) { | |
2d1f3b5d | 695 | put_page(rdev->sb_page); |
1da177e4 LT |
696 | rdev->sb_loaded = 0; |
697 | rdev->sb_page = NULL; | |
0f420358 | 698 | rdev->sb_start = 0; |
dd8ac336 | 699 | rdev->sectors = 0; |
1da177e4 | 700 | } |
2699b672 N |
701 | if (rdev->bb_page) { |
702 | put_page(rdev->bb_page); | |
703 | rdev->bb_page = NULL; | |
704 | } | |
d3b407fb | 705 | badblocks_exit(&rdev->badblocks); |
1da177e4 | 706 | } |
545c8795 | 707 | EXPORT_SYMBOL_GPL(md_rdev_clear); |
1da177e4 | 708 | |
4246a0b6 | 709 | static void super_written(struct bio *bio) |
7bfa19f2 | 710 | { |
3cb03002 | 711 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 712 | struct mddev *mddev = rdev->mddev; |
7bfa19f2 | 713 | |
4246a0b6 CH |
714 | if (bio->bi_error) { |
715 | printk("md: super_written gets error=%d\n", bio->bi_error); | |
a9701a30 | 716 | md_error(mddev, rdev); |
3a0f5bbb | 717 | } |
7bfa19f2 | 718 | |
a9701a30 N |
719 | if (atomic_dec_and_test(&mddev->pending_writes)) |
720 | wake_up(&mddev->sb_wait); | |
ed3b98c7 | 721 | rdev_dec_pending(rdev, mddev); |
f8b58edf | 722 | bio_put(bio); |
7bfa19f2 N |
723 | } |
724 | ||
fd01b88c | 725 | void md_super_write(struct mddev *mddev, struct md_rdev *rdev, |
7bfa19f2 N |
726 | sector_t sector, int size, struct page *page) |
727 | { | |
728 | /* write first size bytes of page to sector of rdev | |
729 | * Increment mddev->pending_writes before returning | |
730 | * and decrement it on completion, waking up sb_wait | |
731 | * if zero is reached. | |
732 | * If an error occurred, call md_error | |
733 | */ | |
a167f663 | 734 | struct bio *bio = bio_alloc_mddev(GFP_NOIO, 1, mddev); |
7bfa19f2 | 735 | |
ed3b98c7 SL |
736 | atomic_inc(&rdev->nr_pending); |
737 | ||
a6ff7e08 | 738 | bio->bi_bdev = rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev; |
4f024f37 | 739 | bio->bi_iter.bi_sector = sector; |
7bfa19f2 N |
740 | bio_add_page(bio, page, size, 0); |
741 | bio->bi_private = rdev; | |
742 | bio->bi_end_io = super_written; | |
a9701a30 | 743 | |
7bfa19f2 | 744 | atomic_inc(&mddev->pending_writes); |
a5bf4df0 | 745 | submit_bio(WRITE_FLUSH_FUA, bio); |
a9701a30 N |
746 | } |
747 | ||
fd01b88c | 748 | void md_super_wait(struct mddev *mddev) |
a9701a30 | 749 | { |
e9c7469b | 750 | /* wait for all superblock writes that were scheduled to complete */ |
1967cd56 | 751 | wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0); |
7bfa19f2 N |
752 | } |
753 | ||
3cb03002 | 754 | int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, |
ccebd4c4 | 755 | struct page *page, int rw, bool metadata_op) |
1da177e4 | 756 | { |
a167f663 | 757 | struct bio *bio = bio_alloc_mddev(GFP_NOIO, 1, rdev->mddev); |
1da177e4 LT |
758 | int ret; |
759 | ||
a6ff7e08 JB |
760 | bio->bi_bdev = (metadata_op && rdev->meta_bdev) ? |
761 | rdev->meta_bdev : rdev->bdev; | |
ccebd4c4 | 762 | if (metadata_op) |
4f024f37 | 763 | bio->bi_iter.bi_sector = sector + rdev->sb_start; |
1fdd6fc9 N |
764 | else if (rdev->mddev->reshape_position != MaxSector && |
765 | (rdev->mddev->reshape_backwards == | |
766 | (sector >= rdev->mddev->reshape_position))) | |
4f024f37 | 767 | bio->bi_iter.bi_sector = sector + rdev->new_data_offset; |
ccebd4c4 | 768 | else |
4f024f37 | 769 | bio->bi_iter.bi_sector = sector + rdev->data_offset; |
1da177e4 | 770 | bio_add_page(bio, page, size, 0); |
c170bbb4 | 771 | submit_bio_wait(rw, bio); |
1da177e4 | 772 | |
4246a0b6 | 773 | ret = !bio->bi_error; |
1da177e4 LT |
774 | bio_put(bio); |
775 | return ret; | |
776 | } | |
a8745db2 | 777 | EXPORT_SYMBOL_GPL(sync_page_io); |
1da177e4 | 778 | |
f72ffdd6 | 779 | static int read_disk_sb(struct md_rdev *rdev, int size) |
1da177e4 LT |
780 | { |
781 | char b[BDEVNAME_SIZE]; | |
403df478 | 782 | |
1da177e4 LT |
783 | if (rdev->sb_loaded) |
784 | return 0; | |
785 | ||
ccebd4c4 | 786 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, READ, true)) |
1da177e4 LT |
787 | goto fail; |
788 | rdev->sb_loaded = 1; | |
789 | return 0; | |
790 | ||
791 | fail: | |
792 | printk(KERN_WARNING "md: disabled device %s, could not read superblock.\n", | |
793 | bdevname(rdev->bdev,b)); | |
794 | return -EINVAL; | |
795 | } | |
796 | ||
797 | static int uuid_equal(mdp_super_t *sb1, mdp_super_t *sb2) | |
798 | { | |
f72ffdd6 | 799 | return sb1->set_uuid0 == sb2->set_uuid0 && |
05710466 AN |
800 | sb1->set_uuid1 == sb2->set_uuid1 && |
801 | sb1->set_uuid2 == sb2->set_uuid2 && | |
802 | sb1->set_uuid3 == sb2->set_uuid3; | |
1da177e4 LT |
803 | } |
804 | ||
1da177e4 LT |
805 | static int sb_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
806 | { | |
807 | int ret; | |
808 | mdp_super_t *tmp1, *tmp2; | |
809 | ||
810 | tmp1 = kmalloc(sizeof(*tmp1),GFP_KERNEL); | |
811 | tmp2 = kmalloc(sizeof(*tmp2),GFP_KERNEL); | |
812 | ||
813 | if (!tmp1 || !tmp2) { | |
814 | ret = 0; | |
35020f1a | 815 | printk(KERN_INFO "md.c sb_equal(): failed to allocate memory!\n"); |
1da177e4 LT |
816 | goto abort; |
817 | } | |
818 | ||
819 | *tmp1 = *sb1; | |
820 | *tmp2 = *sb2; | |
821 | ||
822 | /* | |
823 | * nr_disks is not constant | |
824 | */ | |
825 | tmp1->nr_disks = 0; | |
826 | tmp2->nr_disks = 0; | |
827 | ||
ce0c8e05 | 828 | ret = (memcmp(tmp1, tmp2, MD_SB_GENERIC_CONSTANT_WORDS * 4) == 0); |
1da177e4 | 829 | abort: |
990a8baf JJ |
830 | kfree(tmp1); |
831 | kfree(tmp2); | |
1da177e4 LT |
832 | return ret; |
833 | } | |
834 | ||
4d167f09 N |
835 | static u32 md_csum_fold(u32 csum) |
836 | { | |
837 | csum = (csum & 0xffff) + (csum >> 16); | |
838 | return (csum & 0xffff) + (csum >> 16); | |
839 | } | |
840 | ||
f72ffdd6 | 841 | static unsigned int calc_sb_csum(mdp_super_t *sb) |
1da177e4 | 842 | { |
4d167f09 N |
843 | u64 newcsum = 0; |
844 | u32 *sb32 = (u32*)sb; | |
845 | int i; | |
1da177e4 LT |
846 | unsigned int disk_csum, csum; |
847 | ||
848 | disk_csum = sb->sb_csum; | |
849 | sb->sb_csum = 0; | |
4d167f09 N |
850 | |
851 | for (i = 0; i < MD_SB_BYTES/4 ; i++) | |
852 | newcsum += sb32[i]; | |
853 | csum = (newcsum & 0xffffffff) + (newcsum>>32); | |
854 | ||
4d167f09 N |
855 | #ifdef CONFIG_ALPHA |
856 | /* This used to use csum_partial, which was wrong for several | |
857 | * reasons including that different results are returned on | |
858 | * different architectures. It isn't critical that we get exactly | |
859 | * the same return value as before (we always csum_fold before | |
860 | * testing, and that removes any differences). However as we | |
861 | * know that csum_partial always returned a 16bit value on | |
862 | * alphas, do a fold to maximise conformity to previous behaviour. | |
863 | */ | |
864 | sb->sb_csum = md_csum_fold(disk_csum); | |
865 | #else | |
1da177e4 | 866 | sb->sb_csum = disk_csum; |
4d167f09 | 867 | #endif |
1da177e4 LT |
868 | return csum; |
869 | } | |
870 | ||
1da177e4 LT |
871 | /* |
872 | * Handle superblock details. | |
873 | * We want to be able to handle multiple superblock formats | |
874 | * so we have a common interface to them all, and an array of | |
875 | * different handlers. | |
876 | * We rely on user-space to write the initial superblock, and support | |
877 | * reading and updating of superblocks. | |
878 | * Interface methods are: | |
3cb03002 | 879 | * int load_super(struct md_rdev *dev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
880 | * loads and validates a superblock on dev. |
881 | * if refdev != NULL, compare superblocks on both devices | |
882 | * Return: | |
883 | * 0 - dev has a superblock that is compatible with refdev | |
884 | * 1 - dev has a superblock that is compatible and newer than refdev | |
885 | * so dev should be used as the refdev in future | |
886 | * -EINVAL superblock incompatible or invalid | |
887 | * -othererror e.g. -EIO | |
888 | * | |
fd01b88c | 889 | * int validate_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
890 | * Verify that dev is acceptable into mddev. |
891 | * The first time, mddev->raid_disks will be 0, and data from | |
892 | * dev should be merged in. Subsequent calls check that dev | |
893 | * is new enough. Return 0 or -EINVAL | |
894 | * | |
fd01b88c | 895 | * void sync_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
896 | * Update the superblock for rdev with data in mddev |
897 | * This does not write to disc. | |
898 | * | |
899 | */ | |
900 | ||
901 | struct super_type { | |
0cd17fec CW |
902 | char *name; |
903 | struct module *owner; | |
c6563a8c N |
904 | int (*load_super)(struct md_rdev *rdev, |
905 | struct md_rdev *refdev, | |
0cd17fec | 906 | int minor_version); |
c6563a8c N |
907 | int (*validate_super)(struct mddev *mddev, |
908 | struct md_rdev *rdev); | |
909 | void (*sync_super)(struct mddev *mddev, | |
910 | struct md_rdev *rdev); | |
3cb03002 | 911 | unsigned long long (*rdev_size_change)(struct md_rdev *rdev, |
15f4a5fd | 912 | sector_t num_sectors); |
c6563a8c N |
913 | int (*allow_new_offset)(struct md_rdev *rdev, |
914 | unsigned long long new_offset); | |
1da177e4 LT |
915 | }; |
916 | ||
0894cc30 AN |
917 | /* |
918 | * Check that the given mddev has no bitmap. | |
919 | * | |
920 | * This function is called from the run method of all personalities that do not | |
921 | * support bitmaps. It prints an error message and returns non-zero if mddev | |
922 | * has a bitmap. Otherwise, it returns 0. | |
923 | * | |
924 | */ | |
fd01b88c | 925 | int md_check_no_bitmap(struct mddev *mddev) |
0894cc30 | 926 | { |
c3d9714e | 927 | if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset) |
0894cc30 AN |
928 | return 0; |
929 | printk(KERN_ERR "%s: bitmaps are not supported for %s\n", | |
930 | mdname(mddev), mddev->pers->name); | |
931 | return 1; | |
932 | } | |
933 | EXPORT_SYMBOL(md_check_no_bitmap); | |
934 | ||
1da177e4 | 935 | /* |
f72ffdd6 | 936 | * load_super for 0.90.0 |
1da177e4 | 937 | */ |
3cb03002 | 938 | static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
939 | { |
940 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
941 | mdp_super_t *sb; | |
942 | int ret; | |
1da177e4 LT |
943 | |
944 | /* | |
0f420358 | 945 | * Calculate the position of the superblock (512byte sectors), |
1da177e4 LT |
946 | * it's at the end of the disk. |
947 | * | |
948 | * It also happens to be a multiple of 4Kb. | |
949 | */ | |
57b2caa3 | 950 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 951 | |
0002b271 | 952 | ret = read_disk_sb(rdev, MD_SB_BYTES); |
1da177e4 LT |
953 | if (ret) return ret; |
954 | ||
955 | ret = -EINVAL; | |
956 | ||
957 | bdevname(rdev->bdev, b); | |
65a06f06 | 958 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
959 | |
960 | if (sb->md_magic != MD_SB_MAGIC) { | |
961 | printk(KERN_ERR "md: invalid raid superblock magic on %s\n", | |
962 | b); | |
963 | goto abort; | |
964 | } | |
965 | ||
966 | if (sb->major_version != 0 || | |
f6705578 N |
967 | sb->minor_version < 90 || |
968 | sb->minor_version > 91) { | |
1da177e4 LT |
969 | printk(KERN_WARNING "Bad version number %d.%d on %s\n", |
970 | sb->major_version, sb->minor_version, | |
971 | b); | |
972 | goto abort; | |
973 | } | |
974 | ||
975 | if (sb->raid_disks <= 0) | |
976 | goto abort; | |
977 | ||
4d167f09 | 978 | if (md_csum_fold(calc_sb_csum(sb)) != md_csum_fold(sb->sb_csum)) { |
1da177e4 LT |
979 | printk(KERN_WARNING "md: invalid superblock checksum on %s\n", |
980 | b); | |
981 | goto abort; | |
982 | } | |
983 | ||
984 | rdev->preferred_minor = sb->md_minor; | |
985 | rdev->data_offset = 0; | |
c6563a8c | 986 | rdev->new_data_offset = 0; |
0002b271 | 987 | rdev->sb_size = MD_SB_BYTES; |
9f2f3830 | 988 | rdev->badblocks.shift = -1; |
1da177e4 LT |
989 | |
990 | if (sb->level == LEVEL_MULTIPATH) | |
991 | rdev->desc_nr = -1; | |
992 | else | |
993 | rdev->desc_nr = sb->this_disk.number; | |
994 | ||
9a7b2b0f | 995 | if (!refdev) { |
1da177e4 | 996 | ret = 1; |
9a7b2b0f | 997 | } else { |
1da177e4 | 998 | __u64 ev1, ev2; |
65a06f06 | 999 | mdp_super_t *refsb = page_address(refdev->sb_page); |
1da177e4 LT |
1000 | if (!uuid_equal(refsb, sb)) { |
1001 | printk(KERN_WARNING "md: %s has different UUID to %s\n", | |
1002 | b, bdevname(refdev->bdev,b2)); | |
1003 | goto abort; | |
1004 | } | |
1005 | if (!sb_equal(refsb, sb)) { | |
1006 | printk(KERN_WARNING "md: %s has same UUID" | |
1007 | " but different superblock to %s\n", | |
1008 | b, bdevname(refdev->bdev, b2)); | |
1009 | goto abort; | |
1010 | } | |
1011 | ev1 = md_event(sb); | |
1012 | ev2 = md_event(refsb); | |
1013 | if (ev1 > ev2) | |
1014 | ret = 1; | |
f72ffdd6 | 1015 | else |
1da177e4 LT |
1016 | ret = 0; |
1017 | } | |
8190e754 | 1018 | rdev->sectors = rdev->sb_start; |
667a5313 N |
1019 | /* Limit to 4TB as metadata cannot record more than that. |
1020 | * (not needed for Linear and RAID0 as metadata doesn't | |
1021 | * record this size) | |
1022 | */ | |
3312c951 AB |
1023 | if (IS_ENABLED(CONFIG_LBDAF) && (u64)rdev->sectors >= (2ULL << 32) && |
1024 | sb->level >= 1) | |
1025 | rdev->sectors = (sector_t)(2ULL << 32) - 2; | |
1da177e4 | 1026 | |
27a7b260 | 1027 | if (rdev->sectors < ((sector_t)sb->size) * 2 && sb->level >= 1) |
2bf071bf N |
1028 | /* "this cannot possibly happen" ... */ |
1029 | ret = -EINVAL; | |
1030 | ||
1da177e4 LT |
1031 | abort: |
1032 | return ret; | |
1033 | } | |
1034 | ||
1035 | /* | |
1036 | * validate_super for 0.90.0 | |
1037 | */ | |
fd01b88c | 1038 | static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1039 | { |
1040 | mdp_disk_t *desc; | |
65a06f06 | 1041 | mdp_super_t *sb = page_address(rdev->sb_page); |
07d84d10 | 1042 | __u64 ev1 = md_event(sb); |
1da177e4 | 1043 | |
41158c7e | 1044 | rdev->raid_disk = -1; |
c5d79adb N |
1045 | clear_bit(Faulty, &rdev->flags); |
1046 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1047 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1048 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1049 | |
1da177e4 LT |
1050 | if (mddev->raid_disks == 0) { |
1051 | mddev->major_version = 0; | |
1052 | mddev->minor_version = sb->minor_version; | |
1053 | mddev->patch_version = sb->patch_version; | |
e691063a | 1054 | mddev->external = 0; |
9d8f0363 | 1055 | mddev->chunk_sectors = sb->chunk_size >> 9; |
1da177e4 LT |
1056 | mddev->ctime = sb->ctime; |
1057 | mddev->utime = sb->utime; | |
1058 | mddev->level = sb->level; | |
d9d166c2 | 1059 | mddev->clevel[0] = 0; |
1da177e4 LT |
1060 | mddev->layout = sb->layout; |
1061 | mddev->raid_disks = sb->raid_disks; | |
27a7b260 | 1062 | mddev->dev_sectors = ((sector_t)sb->size) * 2; |
07d84d10 | 1063 | mddev->events = ev1; |
c3d9714e | 1064 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1065 | mddev->bitmap_info.space = 0; |
1066 | /* bitmap can use 60 K after the 4K superblocks */ | |
c3d9714e | 1067 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 1068 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
2c810cdd | 1069 | mddev->reshape_backwards = 0; |
1da177e4 | 1070 | |
f6705578 N |
1071 | if (mddev->minor_version >= 91) { |
1072 | mddev->reshape_position = sb->reshape_position; | |
1073 | mddev->delta_disks = sb->delta_disks; | |
1074 | mddev->new_level = sb->new_level; | |
1075 | mddev->new_layout = sb->new_layout; | |
664e7c41 | 1076 | mddev->new_chunk_sectors = sb->new_chunk >> 9; |
2c810cdd N |
1077 | if (mddev->delta_disks < 0) |
1078 | mddev->reshape_backwards = 1; | |
f6705578 N |
1079 | } else { |
1080 | mddev->reshape_position = MaxSector; | |
1081 | mddev->delta_disks = 0; | |
1082 | mddev->new_level = mddev->level; | |
1083 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1084 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1085 | } |
1086 | ||
1da177e4 LT |
1087 | if (sb->state & (1<<MD_SB_CLEAN)) |
1088 | mddev->recovery_cp = MaxSector; | |
1089 | else { | |
f72ffdd6 | 1090 | if (sb->events_hi == sb->cp_events_hi && |
1da177e4 LT |
1091 | sb->events_lo == sb->cp_events_lo) { |
1092 | mddev->recovery_cp = sb->recovery_cp; | |
1093 | } else | |
1094 | mddev->recovery_cp = 0; | |
1095 | } | |
1096 | ||
1097 | memcpy(mddev->uuid+0, &sb->set_uuid0, 4); | |
1098 | memcpy(mddev->uuid+4, &sb->set_uuid1, 4); | |
1099 | memcpy(mddev->uuid+8, &sb->set_uuid2, 4); | |
1100 | memcpy(mddev->uuid+12,&sb->set_uuid3, 4); | |
1101 | ||
1102 | mddev->max_disks = MD_SB_DISKS; | |
a654b9d8 N |
1103 | |
1104 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT) && | |
6409bb05 | 1105 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1106 | mddev->bitmap_info.offset = |
1107 | mddev->bitmap_info.default_offset; | |
6409bb05 | 1108 | mddev->bitmap_info.space = |
c9ad020f | 1109 | mddev->bitmap_info.default_space; |
6409bb05 | 1110 | } |
a654b9d8 | 1111 | |
41158c7e | 1112 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1113 | /* Insist on good event counter while assembling, except |
1114 | * for spares (which don't need an event count) */ | |
1da177e4 | 1115 | ++ev1; |
be6800a7 N |
1116 | if (sb->disks[rdev->desc_nr].state & ( |
1117 | (1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE))) | |
f72ffdd6 | 1118 | if (ev1 < mddev->events) |
be6800a7 | 1119 | return -EINVAL; |
41158c7e N |
1120 | } else if (mddev->bitmap) { |
1121 | /* if adding to array with a bitmap, then we can accept an | |
1122 | * older device ... but not too old. | |
1123 | */ | |
41158c7e N |
1124 | if (ev1 < mddev->bitmap->events_cleared) |
1125 | return 0; | |
8313b8e5 N |
1126 | if (ev1 < mddev->events) |
1127 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1128 | } else { |
1129 | if (ev1 < mddev->events) | |
1130 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1131 | return 0; | |
1132 | } | |
41158c7e | 1133 | |
1da177e4 | 1134 | if (mddev->level != LEVEL_MULTIPATH) { |
1da177e4 LT |
1135 | desc = sb->disks + rdev->desc_nr; |
1136 | ||
1137 | if (desc->state & (1<<MD_DISK_FAULTY)) | |
b2d444d7 | 1138 | set_bit(Faulty, &rdev->flags); |
7c7546cc N |
1139 | else if (desc->state & (1<<MD_DISK_SYNC) /* && |
1140 | desc->raid_disk < mddev->raid_disks */) { | |
b2d444d7 | 1141 | set_bit(In_sync, &rdev->flags); |
1da177e4 | 1142 | rdev->raid_disk = desc->raid_disk; |
f466722c | 1143 | rdev->saved_raid_disk = desc->raid_disk; |
0261cd9f N |
1144 | } else if (desc->state & (1<<MD_DISK_ACTIVE)) { |
1145 | /* active but not in sync implies recovery up to | |
1146 | * reshape position. We don't know exactly where | |
1147 | * that is, so set to zero for now */ | |
1148 | if (mddev->minor_version >= 91) { | |
1149 | rdev->recovery_offset = 0; | |
1150 | rdev->raid_disk = desc->raid_disk; | |
1151 | } | |
1da177e4 | 1152 | } |
8ddf9efe N |
1153 | if (desc->state & (1<<MD_DISK_WRITEMOSTLY)) |
1154 | set_bit(WriteMostly, &rdev->flags); | |
41158c7e | 1155 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1156 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1157 | return 0; |
1158 | } | |
1159 | ||
1160 | /* | |
1161 | * sync_super for 0.90.0 | |
1162 | */ | |
fd01b88c | 1163 | static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1164 | { |
1165 | mdp_super_t *sb; | |
3cb03002 | 1166 | struct md_rdev *rdev2; |
1da177e4 | 1167 | int next_spare = mddev->raid_disks; |
19133a42 | 1168 | |
1da177e4 LT |
1169 | /* make rdev->sb match mddev data.. |
1170 | * | |
1171 | * 1/ zero out disks | |
1172 | * 2/ Add info for each disk, keeping track of highest desc_nr (next_spare); | |
1173 | * 3/ any empty disks < next_spare become removed | |
1174 | * | |
1175 | * disks[0] gets initialised to REMOVED because | |
1176 | * we cannot be sure from other fields if it has | |
1177 | * been initialised or not. | |
1178 | */ | |
1179 | int i; | |
1180 | int active=0, working=0,failed=0,spare=0,nr_disks=0; | |
1181 | ||
61181565 N |
1182 | rdev->sb_size = MD_SB_BYTES; |
1183 | ||
65a06f06 | 1184 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1185 | |
1186 | memset(sb, 0, sizeof(*sb)); | |
1187 | ||
1188 | sb->md_magic = MD_SB_MAGIC; | |
1189 | sb->major_version = mddev->major_version; | |
1da177e4 LT |
1190 | sb->patch_version = mddev->patch_version; |
1191 | sb->gvalid_words = 0; /* ignored */ | |
1192 | memcpy(&sb->set_uuid0, mddev->uuid+0, 4); | |
1193 | memcpy(&sb->set_uuid1, mddev->uuid+4, 4); | |
1194 | memcpy(&sb->set_uuid2, mddev->uuid+8, 4); | |
1195 | memcpy(&sb->set_uuid3, mddev->uuid+12,4); | |
1196 | ||
9ebc6ef1 | 1197 | sb->ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 1198 | sb->level = mddev->level; |
58c0fed4 | 1199 | sb->size = mddev->dev_sectors / 2; |
1da177e4 LT |
1200 | sb->raid_disks = mddev->raid_disks; |
1201 | sb->md_minor = mddev->md_minor; | |
e691063a | 1202 | sb->not_persistent = 0; |
9ebc6ef1 | 1203 | sb->utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
1204 | sb->state = 0; |
1205 | sb->events_hi = (mddev->events>>32); | |
1206 | sb->events_lo = (u32)mddev->events; | |
1207 | ||
f6705578 N |
1208 | if (mddev->reshape_position == MaxSector) |
1209 | sb->minor_version = 90; | |
1210 | else { | |
1211 | sb->minor_version = 91; | |
1212 | sb->reshape_position = mddev->reshape_position; | |
1213 | sb->new_level = mddev->new_level; | |
1214 | sb->delta_disks = mddev->delta_disks; | |
1215 | sb->new_layout = mddev->new_layout; | |
664e7c41 | 1216 | sb->new_chunk = mddev->new_chunk_sectors << 9; |
f6705578 N |
1217 | } |
1218 | mddev->minor_version = sb->minor_version; | |
1da177e4 LT |
1219 | if (mddev->in_sync) |
1220 | { | |
1221 | sb->recovery_cp = mddev->recovery_cp; | |
1222 | sb->cp_events_hi = (mddev->events>>32); | |
1223 | sb->cp_events_lo = (u32)mddev->events; | |
1224 | if (mddev->recovery_cp == MaxSector) | |
1225 | sb->state = (1<< MD_SB_CLEAN); | |
1226 | } else | |
1227 | sb->recovery_cp = 0; | |
1228 | ||
1229 | sb->layout = mddev->layout; | |
9d8f0363 | 1230 | sb->chunk_size = mddev->chunk_sectors << 9; |
1da177e4 | 1231 | |
c3d9714e | 1232 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) |
a654b9d8 N |
1233 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); |
1234 | ||
1da177e4 | 1235 | sb->disks[0].state = (1<<MD_DISK_REMOVED); |
dafb20fa | 1236 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1237 | mdp_disk_t *d; |
86e6ffdd | 1238 | int desc_nr; |
0261cd9f N |
1239 | int is_active = test_bit(In_sync, &rdev2->flags); |
1240 | ||
1241 | if (rdev2->raid_disk >= 0 && | |
1242 | sb->minor_version >= 91) | |
1243 | /* we have nowhere to store the recovery_offset, | |
1244 | * but if it is not below the reshape_position, | |
1245 | * we can piggy-back on that. | |
1246 | */ | |
1247 | is_active = 1; | |
1248 | if (rdev2->raid_disk < 0 || | |
1249 | test_bit(Faulty, &rdev2->flags)) | |
1250 | is_active = 0; | |
1251 | if (is_active) | |
86e6ffdd | 1252 | desc_nr = rdev2->raid_disk; |
1da177e4 | 1253 | else |
86e6ffdd | 1254 | desc_nr = next_spare++; |
19133a42 | 1255 | rdev2->desc_nr = desc_nr; |
1da177e4 LT |
1256 | d = &sb->disks[rdev2->desc_nr]; |
1257 | nr_disks++; | |
1258 | d->number = rdev2->desc_nr; | |
1259 | d->major = MAJOR(rdev2->bdev->bd_dev); | |
1260 | d->minor = MINOR(rdev2->bdev->bd_dev); | |
0261cd9f | 1261 | if (is_active) |
1da177e4 LT |
1262 | d->raid_disk = rdev2->raid_disk; |
1263 | else | |
1264 | d->raid_disk = rdev2->desc_nr; /* compatibility */ | |
1be7892f | 1265 | if (test_bit(Faulty, &rdev2->flags)) |
1da177e4 | 1266 | d->state = (1<<MD_DISK_FAULTY); |
0261cd9f | 1267 | else if (is_active) { |
1da177e4 | 1268 | d->state = (1<<MD_DISK_ACTIVE); |
0261cd9f N |
1269 | if (test_bit(In_sync, &rdev2->flags)) |
1270 | d->state |= (1<<MD_DISK_SYNC); | |
1da177e4 LT |
1271 | active++; |
1272 | working++; | |
1273 | } else { | |
1274 | d->state = 0; | |
1275 | spare++; | |
1276 | working++; | |
1277 | } | |
8ddf9efe N |
1278 | if (test_bit(WriteMostly, &rdev2->flags)) |
1279 | d->state |= (1<<MD_DISK_WRITEMOSTLY); | |
1da177e4 | 1280 | } |
1da177e4 LT |
1281 | /* now set the "removed" and "faulty" bits on any missing devices */ |
1282 | for (i=0 ; i < mddev->raid_disks ; i++) { | |
1283 | mdp_disk_t *d = &sb->disks[i]; | |
1284 | if (d->state == 0 && d->number == 0) { | |
1285 | d->number = i; | |
1286 | d->raid_disk = i; | |
1287 | d->state = (1<<MD_DISK_REMOVED); | |
1288 | d->state |= (1<<MD_DISK_FAULTY); | |
1289 | failed++; | |
1290 | } | |
1291 | } | |
1292 | sb->nr_disks = nr_disks; | |
1293 | sb->active_disks = active; | |
1294 | sb->working_disks = working; | |
1295 | sb->failed_disks = failed; | |
1296 | sb->spare_disks = spare; | |
1297 | ||
1298 | sb->this_disk = sb->disks[rdev->desc_nr]; | |
1299 | sb->sb_csum = calc_sb_csum(sb); | |
1300 | } | |
1301 | ||
0cd17fec CW |
1302 | /* |
1303 | * rdev_size_change for 0.90.0 | |
1304 | */ | |
1305 | static unsigned long long | |
3cb03002 | 1306 | super_90_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec | 1307 | { |
58c0fed4 | 1308 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1309 | return 0; /* component must fit device */ |
c3d9714e | 1310 | if (rdev->mddev->bitmap_info.offset) |
0cd17fec | 1311 | return 0; /* can't move bitmap */ |
57b2caa3 | 1312 | rdev->sb_start = calc_dev_sboffset(rdev); |
15f4a5fd AN |
1313 | if (!num_sectors || num_sectors > rdev->sb_start) |
1314 | num_sectors = rdev->sb_start; | |
27a7b260 N |
1315 | /* Limit to 4TB as metadata cannot record more than that. |
1316 | * 4TB == 2^32 KB, or 2*2^32 sectors. | |
1317 | */ | |
3312c951 AB |
1318 | if (IS_ENABLED(CONFIG_LBDAF) && (u64)num_sectors >= (2ULL << 32) && |
1319 | rdev->mddev->level >= 1) | |
1320 | num_sectors = (sector_t)(2ULL << 32) - 2; | |
0f420358 | 1321 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, |
0cd17fec CW |
1322 | rdev->sb_page); |
1323 | md_super_wait(rdev->mddev); | |
c26a44ed | 1324 | return num_sectors; |
0cd17fec CW |
1325 | } |
1326 | ||
c6563a8c N |
1327 | static int |
1328 | super_90_allow_new_offset(struct md_rdev *rdev, unsigned long long new_offset) | |
1329 | { | |
1330 | /* non-zero offset changes not possible with v0.90 */ | |
1331 | return new_offset == 0; | |
1332 | } | |
0cd17fec | 1333 | |
1da177e4 LT |
1334 | /* |
1335 | * version 1 superblock | |
1336 | */ | |
1337 | ||
f72ffdd6 | 1338 | static __le32 calc_sb_1_csum(struct mdp_superblock_1 *sb) |
1da177e4 | 1339 | { |
1c05b4bc N |
1340 | __le32 disk_csum; |
1341 | u32 csum; | |
1da177e4 LT |
1342 | unsigned long long newcsum; |
1343 | int size = 256 + le32_to_cpu(sb->max_dev)*2; | |
1c05b4bc | 1344 | __le32 *isuper = (__le32*)sb; |
1da177e4 LT |
1345 | |
1346 | disk_csum = sb->sb_csum; | |
1347 | sb->sb_csum = 0; | |
1348 | newcsum = 0; | |
1f3c9907 | 1349 | for (; size >= 4; size -= 4) |
1da177e4 LT |
1350 | newcsum += le32_to_cpu(*isuper++); |
1351 | ||
1352 | if (size == 2) | |
1c05b4bc | 1353 | newcsum += le16_to_cpu(*(__le16*) isuper); |
1da177e4 LT |
1354 | |
1355 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
1356 | sb->sb_csum = disk_csum; | |
1357 | return cpu_to_le32(csum); | |
1358 | } | |
1359 | ||
3cb03002 | 1360 | static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1361 | { |
1362 | struct mdp_superblock_1 *sb; | |
1363 | int ret; | |
0f420358 | 1364 | sector_t sb_start; |
c6563a8c | 1365 | sector_t sectors; |
1da177e4 | 1366 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; |
0002b271 | 1367 | int bmask; |
1da177e4 LT |
1368 | |
1369 | /* | |
0f420358 | 1370 | * Calculate the position of the superblock in 512byte sectors. |
1da177e4 LT |
1371 | * It is always aligned to a 4K boundary and |
1372 | * depeding on minor_version, it can be: | |
1373 | * 0: At least 8K, but less than 12K, from end of device | |
1374 | * 1: At start of device | |
1375 | * 2: 4K from start of device. | |
1376 | */ | |
1377 | switch(minor_version) { | |
1378 | case 0: | |
77304d2a | 1379 | sb_start = i_size_read(rdev->bdev->bd_inode) >> 9; |
0f420358 AN |
1380 | sb_start -= 8*2; |
1381 | sb_start &= ~(sector_t)(4*2-1); | |
1da177e4 LT |
1382 | break; |
1383 | case 1: | |
0f420358 | 1384 | sb_start = 0; |
1da177e4 LT |
1385 | break; |
1386 | case 2: | |
0f420358 | 1387 | sb_start = 8; |
1da177e4 LT |
1388 | break; |
1389 | default: | |
1390 | return -EINVAL; | |
1391 | } | |
0f420358 | 1392 | rdev->sb_start = sb_start; |
1da177e4 | 1393 | |
0002b271 N |
1394 | /* superblock is rarely larger than 1K, but it can be larger, |
1395 | * and it is safe to read 4k, so we do that | |
1396 | */ | |
1397 | ret = read_disk_sb(rdev, 4096); | |
1da177e4 LT |
1398 | if (ret) return ret; |
1399 | ||
65a06f06 | 1400 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1401 | |
1402 | if (sb->magic != cpu_to_le32(MD_SB_MAGIC) || | |
1403 | sb->major_version != cpu_to_le32(1) || | |
1404 | le32_to_cpu(sb->max_dev) > (4096-256)/2 || | |
0f420358 | 1405 | le64_to_cpu(sb->super_offset) != rdev->sb_start || |
71c0805c | 1406 | (le32_to_cpu(sb->feature_map) & ~MD_FEATURE_ALL) != 0) |
1da177e4 LT |
1407 | return -EINVAL; |
1408 | ||
1409 | if (calc_sb_1_csum(sb) != sb->sb_csum) { | |
1410 | printk("md: invalid superblock checksum on %s\n", | |
1411 | bdevname(rdev->bdev,b)); | |
1412 | return -EINVAL; | |
1413 | } | |
1414 | if (le64_to_cpu(sb->data_size) < 10) { | |
1415 | printk("md: data_size too small on %s\n", | |
1416 | bdevname(rdev->bdev,b)); | |
1417 | return -EINVAL; | |
1418 | } | |
c6563a8c N |
1419 | if (sb->pad0 || |
1420 | sb->pad3[0] || | |
1421 | memcmp(sb->pad3, sb->pad3+1, sizeof(sb->pad3) - sizeof(sb->pad3[1]))) | |
1422 | /* Some padding is non-zero, might be a new feature */ | |
1423 | return -EINVAL; | |
e11e93fa | 1424 | |
1da177e4 LT |
1425 | rdev->preferred_minor = 0xffff; |
1426 | rdev->data_offset = le64_to_cpu(sb->data_offset); | |
c6563a8c N |
1427 | rdev->new_data_offset = rdev->data_offset; |
1428 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE) && | |
1429 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) | |
1430 | rdev->new_data_offset += (s32)le32_to_cpu(sb->new_offset); | |
4dbcdc75 | 1431 | atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read)); |
1da177e4 | 1432 | |
0002b271 | 1433 | rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256; |
e1defc4f | 1434 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; |
0002b271 | 1435 | if (rdev->sb_size & bmask) |
a1801f85 N |
1436 | rdev->sb_size = (rdev->sb_size | bmask) + 1; |
1437 | ||
1438 | if (minor_version | |
0f420358 | 1439 | && rdev->data_offset < sb_start + (rdev->sb_size/512)) |
a1801f85 | 1440 | return -EINVAL; |
c6563a8c N |
1441 | if (minor_version |
1442 | && rdev->new_data_offset < sb_start + (rdev->sb_size/512)) | |
1443 | return -EINVAL; | |
0002b271 | 1444 | |
31b65a0d N |
1445 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH)) |
1446 | rdev->desc_nr = -1; | |
1447 | else | |
1448 | rdev->desc_nr = le32_to_cpu(sb->dev_number); | |
1449 | ||
2699b672 N |
1450 | if (!rdev->bb_page) { |
1451 | rdev->bb_page = alloc_page(GFP_KERNEL); | |
1452 | if (!rdev->bb_page) | |
1453 | return -ENOMEM; | |
1454 | } | |
1455 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BAD_BLOCKS) && | |
1456 | rdev->badblocks.count == 0) { | |
1457 | /* need to load the bad block list. | |
1458 | * Currently we limit it to one page. | |
1459 | */ | |
1460 | s32 offset; | |
1461 | sector_t bb_sector; | |
1462 | u64 *bbp; | |
1463 | int i; | |
1464 | int sectors = le16_to_cpu(sb->bblog_size); | |
1465 | if (sectors > (PAGE_SIZE / 512)) | |
1466 | return -EINVAL; | |
1467 | offset = le32_to_cpu(sb->bblog_offset); | |
1468 | if (offset == 0) | |
1469 | return -EINVAL; | |
1470 | bb_sector = (long long)offset; | |
1471 | if (!sync_page_io(rdev, bb_sector, sectors << 9, | |
1472 | rdev->bb_page, READ, true)) | |
1473 | return -EIO; | |
1474 | bbp = (u64 *)page_address(rdev->bb_page); | |
1475 | rdev->badblocks.shift = sb->bblog_shift; | |
1476 | for (i = 0 ; i < (sectors << (9-3)) ; i++, bbp++) { | |
1477 | u64 bb = le64_to_cpu(*bbp); | |
1478 | int count = bb & (0x3ff); | |
1479 | u64 sector = bb >> 10; | |
1480 | sector <<= sb->bblog_shift; | |
1481 | count <<= sb->bblog_shift; | |
1482 | if (bb + 1 == 0) | |
1483 | break; | |
fc974ee2 | 1484 | if (badblocks_set(&rdev->badblocks, sector, count, 1)) |
2699b672 N |
1485 | return -EINVAL; |
1486 | } | |
486adf72 N |
1487 | } else if (sb->bblog_offset != 0) |
1488 | rdev->badblocks.shift = 0; | |
2699b672 | 1489 | |
9a7b2b0f | 1490 | if (!refdev) { |
8ed75463 | 1491 | ret = 1; |
9a7b2b0f | 1492 | } else { |
1da177e4 | 1493 | __u64 ev1, ev2; |
65a06f06 | 1494 | struct mdp_superblock_1 *refsb = page_address(refdev->sb_page); |
1da177e4 LT |
1495 | |
1496 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16) != 0 || | |
1497 | sb->level != refsb->level || | |
1498 | sb->layout != refsb->layout || | |
1499 | sb->chunksize != refsb->chunksize) { | |
1500 | printk(KERN_WARNING "md: %s has strangely different" | |
1501 | " superblock to %s\n", | |
1502 | bdevname(rdev->bdev,b), | |
1503 | bdevname(refdev->bdev,b2)); | |
1504 | return -EINVAL; | |
1505 | } | |
1506 | ev1 = le64_to_cpu(sb->events); | |
1507 | ev2 = le64_to_cpu(refsb->events); | |
1508 | ||
1509 | if (ev1 > ev2) | |
8ed75463 N |
1510 | ret = 1; |
1511 | else | |
1512 | ret = 0; | |
1da177e4 | 1513 | } |
c6563a8c N |
1514 | if (minor_version) { |
1515 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9); | |
1516 | sectors -= rdev->data_offset; | |
1517 | } else | |
1518 | sectors = rdev->sb_start; | |
1519 | if (sectors < le64_to_cpu(sb->data_size)) | |
1da177e4 | 1520 | return -EINVAL; |
dd8ac336 | 1521 | rdev->sectors = le64_to_cpu(sb->data_size); |
8ed75463 | 1522 | return ret; |
1da177e4 LT |
1523 | } |
1524 | ||
fd01b88c | 1525 | static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 1526 | { |
65a06f06 | 1527 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
07d84d10 | 1528 | __u64 ev1 = le64_to_cpu(sb->events); |
1da177e4 | 1529 | |
41158c7e | 1530 | rdev->raid_disk = -1; |
c5d79adb N |
1531 | clear_bit(Faulty, &rdev->flags); |
1532 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1533 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1534 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1535 | |
1da177e4 LT |
1536 | if (mddev->raid_disks == 0) { |
1537 | mddev->major_version = 1; | |
1538 | mddev->patch_version = 0; | |
e691063a | 1539 | mddev->external = 0; |
9d8f0363 | 1540 | mddev->chunk_sectors = le32_to_cpu(sb->chunksize); |
9ebc6ef1 DD |
1541 | mddev->ctime = le64_to_cpu(sb->ctime); |
1542 | mddev->utime = le64_to_cpu(sb->utime); | |
1da177e4 | 1543 | mddev->level = le32_to_cpu(sb->level); |
d9d166c2 | 1544 | mddev->clevel[0] = 0; |
1da177e4 LT |
1545 | mddev->layout = le32_to_cpu(sb->layout); |
1546 | mddev->raid_disks = le32_to_cpu(sb->raid_disks); | |
58c0fed4 | 1547 | mddev->dev_sectors = le64_to_cpu(sb->size); |
07d84d10 | 1548 | mddev->events = ev1; |
c3d9714e | 1549 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1550 | mddev->bitmap_info.space = 0; |
1551 | /* Default location for bitmap is 1K after superblock | |
1552 | * using 3K - total of 4K | |
1553 | */ | |
c3d9714e | 1554 | mddev->bitmap_info.default_offset = 1024 >> 9; |
6409bb05 | 1555 | mddev->bitmap_info.default_space = (4096-1024) >> 9; |
2c810cdd N |
1556 | mddev->reshape_backwards = 0; |
1557 | ||
1da177e4 LT |
1558 | mddev->recovery_cp = le64_to_cpu(sb->resync_offset); |
1559 | memcpy(mddev->uuid, sb->set_uuid, 16); | |
1560 | ||
1561 | mddev->max_disks = (4096-256)/2; | |
a654b9d8 | 1562 | |
71c0805c | 1563 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) && |
6409bb05 | 1564 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1565 | mddev->bitmap_info.offset = |
1566 | (__s32)le32_to_cpu(sb->bitmap_offset); | |
6409bb05 N |
1567 | /* Metadata doesn't record how much space is available. |
1568 | * For 1.0, we assume we can use up to the superblock | |
1569 | * if before, else to 4K beyond superblock. | |
1570 | * For others, assume no change is possible. | |
1571 | */ | |
1572 | if (mddev->minor_version > 0) | |
1573 | mddev->bitmap_info.space = 0; | |
1574 | else if (mddev->bitmap_info.offset > 0) | |
1575 | mddev->bitmap_info.space = | |
1576 | 8 - mddev->bitmap_info.offset; | |
1577 | else | |
1578 | mddev->bitmap_info.space = | |
1579 | -mddev->bitmap_info.offset; | |
1580 | } | |
e11e93fa | 1581 | |
f6705578 N |
1582 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { |
1583 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); | |
1584 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); | |
1585 | mddev->new_level = le32_to_cpu(sb->new_level); | |
1586 | mddev->new_layout = le32_to_cpu(sb->new_layout); | |
664e7c41 | 1587 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_chunk); |
2c810cdd N |
1588 | if (mddev->delta_disks < 0 || |
1589 | (mddev->delta_disks == 0 && | |
1590 | (le32_to_cpu(sb->feature_map) | |
1591 | & MD_FEATURE_RESHAPE_BACKWARDS))) | |
1592 | mddev->reshape_backwards = 1; | |
f6705578 N |
1593 | } else { |
1594 | mddev->reshape_position = MaxSector; | |
1595 | mddev->delta_disks = 0; | |
1596 | mddev->new_level = mddev->level; | |
1597 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1598 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1599 | } |
1600 | ||
a62ab49e SL |
1601 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL) { |
1602 | set_bit(MD_HAS_JOURNAL, &mddev->flags); | |
1603 | if (mddev->recovery_cp == MaxSector) | |
1604 | set_bit(MD_JOURNAL_CLEAN, &mddev->flags); | |
1605 | } | |
41158c7e | 1606 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1607 | /* Insist of good event counter while assembling, except for |
1608 | * spares (which don't need an event count) */ | |
1da177e4 | 1609 | ++ev1; |
be6800a7 N |
1610 | if (rdev->desc_nr >= 0 && |
1611 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
a3dfbdaa SL |
1612 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || |
1613 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL)) | |
be6800a7 N |
1614 | if (ev1 < mddev->events) |
1615 | return -EINVAL; | |
41158c7e N |
1616 | } else if (mddev->bitmap) { |
1617 | /* If adding to array with a bitmap, then we can accept an | |
1618 | * older device, but not too old. | |
1619 | */ | |
41158c7e N |
1620 | if (ev1 < mddev->bitmap->events_cleared) |
1621 | return 0; | |
8313b8e5 N |
1622 | if (ev1 < mddev->events) |
1623 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1624 | } else { |
1625 | if (ev1 < mddev->events) | |
1626 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1627 | return 0; | |
1628 | } | |
1da177e4 LT |
1629 | if (mddev->level != LEVEL_MULTIPATH) { |
1630 | int role; | |
3673f305 N |
1631 | if (rdev->desc_nr < 0 || |
1632 | rdev->desc_nr >= le32_to_cpu(sb->max_dev)) { | |
c4d4c91b | 1633 | role = MD_DISK_ROLE_SPARE; |
3673f305 N |
1634 | rdev->desc_nr = -1; |
1635 | } else | |
1636 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
1da177e4 | 1637 | switch(role) { |
c4d4c91b | 1638 | case MD_DISK_ROLE_SPARE: /* spare */ |
1da177e4 | 1639 | break; |
c4d4c91b | 1640 | case MD_DISK_ROLE_FAULTY: /* faulty */ |
b2d444d7 | 1641 | set_bit(Faulty, &rdev->flags); |
1da177e4 | 1642 | break; |
bac624f3 SL |
1643 | case MD_DISK_ROLE_JOURNAL: /* journal device */ |
1644 | if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL)) { | |
1645 | /* journal device without journal feature */ | |
1646 | printk(KERN_WARNING | |
1647 | "md: journal device provided without journal feature, ignoring the device\n"); | |
1648 | return -EINVAL; | |
1649 | } | |
1650 | set_bit(Journal, &rdev->flags); | |
3069aa8d | 1651 | rdev->journal_tail = le64_to_cpu(sb->journal_tail); |
9b15603d | 1652 | rdev->raid_disk = 0; |
bac624f3 | 1653 | break; |
1da177e4 | 1654 | default: |
f466722c | 1655 | rdev->saved_raid_disk = role; |
5fd6c1dc | 1656 | if ((le32_to_cpu(sb->feature_map) & |
f466722c | 1657 | MD_FEATURE_RECOVERY_OFFSET)) { |
5fd6c1dc | 1658 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); |
f466722c N |
1659 | if (!(le32_to_cpu(sb->feature_map) & |
1660 | MD_FEATURE_RECOVERY_BITMAP)) | |
1661 | rdev->saved_raid_disk = -1; | |
1662 | } else | |
5fd6c1dc | 1663 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1664 | rdev->raid_disk = role; |
1665 | break; | |
1666 | } | |
8ddf9efe N |
1667 | if (sb->devflags & WriteMostly1) |
1668 | set_bit(WriteMostly, &rdev->flags); | |
2d78f8c4 N |
1669 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) |
1670 | set_bit(Replacement, &rdev->flags); | |
41158c7e | 1671 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1672 | set_bit(In_sync, &rdev->flags); |
41158c7e | 1673 | |
1da177e4 LT |
1674 | return 0; |
1675 | } | |
1676 | ||
fd01b88c | 1677 | static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1678 | { |
1679 | struct mdp_superblock_1 *sb; | |
3cb03002 | 1680 | struct md_rdev *rdev2; |
1da177e4 LT |
1681 | int max_dev, i; |
1682 | /* make rdev->sb match mddev and rdev data. */ | |
1683 | ||
65a06f06 | 1684 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1685 | |
1686 | sb->feature_map = 0; | |
1687 | sb->pad0 = 0; | |
5fd6c1dc | 1688 | sb->recovery_offset = cpu_to_le64(0); |
1da177e4 LT |
1689 | memset(sb->pad3, 0, sizeof(sb->pad3)); |
1690 | ||
1691 | sb->utime = cpu_to_le64((__u64)mddev->utime); | |
1692 | sb->events = cpu_to_le64(mddev->events); | |
1693 | if (mddev->in_sync) | |
1694 | sb->resync_offset = cpu_to_le64(mddev->recovery_cp); | |
bd18f646 SL |
1695 | else if (test_bit(MD_JOURNAL_CLEAN, &mddev->flags)) |
1696 | sb->resync_offset = cpu_to_le64(MaxSector); | |
1da177e4 LT |
1697 | else |
1698 | sb->resync_offset = cpu_to_le64(0); | |
1699 | ||
1c05b4bc | 1700 | sb->cnt_corrected_read = cpu_to_le32(atomic_read(&rdev->corrected_errors)); |
4dbcdc75 | 1701 | |
f0ca340c | 1702 | sb->raid_disks = cpu_to_le32(mddev->raid_disks); |
58c0fed4 | 1703 | sb->size = cpu_to_le64(mddev->dev_sectors); |
9d8f0363 | 1704 | sb->chunksize = cpu_to_le32(mddev->chunk_sectors); |
62e1e389 N |
1705 | sb->level = cpu_to_le32(mddev->level); |
1706 | sb->layout = cpu_to_le32(mddev->layout); | |
f0ca340c | 1707 | |
aeb9b211 N |
1708 | if (test_bit(WriteMostly, &rdev->flags)) |
1709 | sb->devflags |= WriteMostly1; | |
1710 | else | |
1711 | sb->devflags &= ~WriteMostly1; | |
c6563a8c N |
1712 | sb->data_offset = cpu_to_le64(rdev->data_offset); |
1713 | sb->data_size = cpu_to_le64(rdev->sectors); | |
aeb9b211 | 1714 | |
c3d9714e N |
1715 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) { |
1716 | sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset); | |
71c0805c | 1717 | sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); |
a654b9d8 | 1718 | } |
5fd6c1dc | 1719 | |
f2076e7d | 1720 | if (rdev->raid_disk >= 0 && !test_bit(Journal, &rdev->flags) && |
97e4f42d | 1721 | !test_bit(In_sync, &rdev->flags)) { |
93be75ff N |
1722 | sb->feature_map |= |
1723 | cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET); | |
1724 | sb->recovery_offset = | |
1725 | cpu_to_le64(rdev->recovery_offset); | |
f466722c N |
1726 | if (rdev->saved_raid_disk >= 0 && mddev->bitmap) |
1727 | sb->feature_map |= | |
1728 | cpu_to_le32(MD_FEATURE_RECOVERY_BITMAP); | |
5fd6c1dc | 1729 | } |
3069aa8d SL |
1730 | /* Note: recovery_offset and journal_tail share space */ |
1731 | if (test_bit(Journal, &rdev->flags)) | |
1732 | sb->journal_tail = cpu_to_le64(rdev->journal_tail); | |
2d78f8c4 N |
1733 | if (test_bit(Replacement, &rdev->flags)) |
1734 | sb->feature_map |= | |
1735 | cpu_to_le32(MD_FEATURE_REPLACEMENT); | |
5fd6c1dc | 1736 | |
f6705578 N |
1737 | if (mddev->reshape_position != MaxSector) { |
1738 | sb->feature_map |= cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); | |
1739 | sb->reshape_position = cpu_to_le64(mddev->reshape_position); | |
1740 | sb->new_layout = cpu_to_le32(mddev->new_layout); | |
1741 | sb->delta_disks = cpu_to_le32(mddev->delta_disks); | |
1742 | sb->new_level = cpu_to_le32(mddev->new_level); | |
664e7c41 | 1743 | sb->new_chunk = cpu_to_le32(mddev->new_chunk_sectors); |
2c810cdd N |
1744 | if (mddev->delta_disks == 0 && |
1745 | mddev->reshape_backwards) | |
1746 | sb->feature_map | |
1747 | |= cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS); | |
c6563a8c N |
1748 | if (rdev->new_data_offset != rdev->data_offset) { |
1749 | sb->feature_map | |
1750 | |= cpu_to_le32(MD_FEATURE_NEW_OFFSET); | |
1751 | sb->new_offset = cpu_to_le32((__u32)(rdev->new_data_offset | |
1752 | - rdev->data_offset)); | |
1753 | } | |
f6705578 | 1754 | } |
a654b9d8 | 1755 | |
3c462c88 GR |
1756 | if (mddev_is_clustered(mddev)) |
1757 | sb->feature_map |= cpu_to_le32(MD_FEATURE_CLUSTERED); | |
1758 | ||
2699b672 N |
1759 | if (rdev->badblocks.count == 0) |
1760 | /* Nothing to do for bad blocks*/ ; | |
1761 | else if (sb->bblog_offset == 0) | |
1762 | /* Cannot record bad blocks on this device */ | |
1763 | md_error(mddev, rdev); | |
1764 | else { | |
1765 | struct badblocks *bb = &rdev->badblocks; | |
1766 | u64 *bbp = (u64 *)page_address(rdev->bb_page); | |
1767 | u64 *p = bb->page; | |
1768 | sb->feature_map |= cpu_to_le32(MD_FEATURE_BAD_BLOCKS); | |
1769 | if (bb->changed) { | |
1770 | unsigned seq; | |
1771 | ||
1772 | retry: | |
1773 | seq = read_seqbegin(&bb->lock); | |
1774 | ||
1775 | memset(bbp, 0xff, PAGE_SIZE); | |
1776 | ||
1777 | for (i = 0 ; i < bb->count ; i++) { | |
35f9ac2d | 1778 | u64 internal_bb = p[i]; |
2699b672 N |
1779 | u64 store_bb = ((BB_OFFSET(internal_bb) << 10) |
1780 | | BB_LEN(internal_bb)); | |
35f9ac2d | 1781 | bbp[i] = cpu_to_le64(store_bb); |
2699b672 | 1782 | } |
d0962936 | 1783 | bb->changed = 0; |
2699b672 N |
1784 | if (read_seqretry(&bb->lock, seq)) |
1785 | goto retry; | |
1786 | ||
1787 | bb->sector = (rdev->sb_start + | |
1788 | (int)le32_to_cpu(sb->bblog_offset)); | |
1789 | bb->size = le16_to_cpu(sb->bblog_size); | |
2699b672 N |
1790 | } |
1791 | } | |
1792 | ||
1da177e4 | 1793 | max_dev = 0; |
dafb20fa | 1794 | rdev_for_each(rdev2, mddev) |
1da177e4 LT |
1795 | if (rdev2->desc_nr+1 > max_dev) |
1796 | max_dev = rdev2->desc_nr+1; | |
a778b73f | 1797 | |
70471daf N |
1798 | if (max_dev > le32_to_cpu(sb->max_dev)) { |
1799 | int bmask; | |
a778b73f | 1800 | sb->max_dev = cpu_to_le32(max_dev); |
70471daf N |
1801 | rdev->sb_size = max_dev * 2 + 256; |
1802 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; | |
1803 | if (rdev->sb_size & bmask) | |
1804 | rdev->sb_size = (rdev->sb_size | bmask) + 1; | |
ddcf3522 N |
1805 | } else |
1806 | max_dev = le32_to_cpu(sb->max_dev); | |
1807 | ||
1da177e4 | 1808 | for (i=0; i<max_dev;i++) |
c4d4c91b | 1809 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY); |
f72ffdd6 | 1810 | |
a97b7896 SL |
1811 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) |
1812 | sb->feature_map |= cpu_to_le32(MD_FEATURE_JOURNAL); | |
f72ffdd6 | 1813 | |
dafb20fa | 1814 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1815 | i = rdev2->desc_nr; |
b2d444d7 | 1816 | if (test_bit(Faulty, &rdev2->flags)) |
c4d4c91b | 1817 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY); |
b2d444d7 | 1818 | else if (test_bit(In_sync, &rdev2->flags)) |
1da177e4 | 1819 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
a97b7896 | 1820 | else if (test_bit(Journal, &rdev2->flags)) |
bac624f3 | 1821 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_JOURNAL); |
93be75ff | 1822 | else if (rdev2->raid_disk >= 0) |
5fd6c1dc | 1823 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
1da177e4 | 1824 | else |
c4d4c91b | 1825 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
1da177e4 LT |
1826 | } |
1827 | ||
1da177e4 LT |
1828 | sb->sb_csum = calc_sb_1_csum(sb); |
1829 | } | |
1830 | ||
0cd17fec | 1831 | static unsigned long long |
3cb03002 | 1832 | super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec CW |
1833 | { |
1834 | struct mdp_superblock_1 *sb; | |
15f4a5fd | 1835 | sector_t max_sectors; |
58c0fed4 | 1836 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1837 | return 0; /* component must fit device */ |
c6563a8c N |
1838 | if (rdev->data_offset != rdev->new_data_offset) |
1839 | return 0; /* too confusing */ | |
0f420358 | 1840 | if (rdev->sb_start < rdev->data_offset) { |
0cd17fec | 1841 | /* minor versions 1 and 2; superblock before data */ |
77304d2a | 1842 | max_sectors = i_size_read(rdev->bdev->bd_inode) >> 9; |
15f4a5fd AN |
1843 | max_sectors -= rdev->data_offset; |
1844 | if (!num_sectors || num_sectors > max_sectors) | |
1845 | num_sectors = max_sectors; | |
c3d9714e | 1846 | } else if (rdev->mddev->bitmap_info.offset) { |
0cd17fec CW |
1847 | /* minor version 0 with bitmap we can't move */ |
1848 | return 0; | |
1849 | } else { | |
1850 | /* minor version 0; superblock after data */ | |
0f420358 | 1851 | sector_t sb_start; |
77304d2a | 1852 | sb_start = (i_size_read(rdev->bdev->bd_inode) >> 9) - 8*2; |
0f420358 | 1853 | sb_start &= ~(sector_t)(4*2 - 1); |
dd8ac336 | 1854 | max_sectors = rdev->sectors + sb_start - rdev->sb_start; |
15f4a5fd AN |
1855 | if (!num_sectors || num_sectors > max_sectors) |
1856 | num_sectors = max_sectors; | |
0f420358 | 1857 | rdev->sb_start = sb_start; |
0cd17fec | 1858 | } |
65a06f06 | 1859 | sb = page_address(rdev->sb_page); |
15f4a5fd | 1860 | sb->data_size = cpu_to_le64(num_sectors); |
0f420358 | 1861 | sb->super_offset = rdev->sb_start; |
0cd17fec | 1862 | sb->sb_csum = calc_sb_1_csum(sb); |
0f420358 | 1863 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, |
0cd17fec CW |
1864 | rdev->sb_page); |
1865 | md_super_wait(rdev->mddev); | |
c26a44ed | 1866 | return num_sectors; |
c6563a8c N |
1867 | |
1868 | } | |
1869 | ||
1870 | static int | |
1871 | super_1_allow_new_offset(struct md_rdev *rdev, | |
1872 | unsigned long long new_offset) | |
1873 | { | |
1874 | /* All necessary checks on new >= old have been done */ | |
1875 | struct bitmap *bitmap; | |
1876 | if (new_offset >= rdev->data_offset) | |
1877 | return 1; | |
1878 | ||
1879 | /* with 1.0 metadata, there is no metadata to tread on | |
1880 | * so we can always move back */ | |
1881 | if (rdev->mddev->minor_version == 0) | |
1882 | return 1; | |
1883 | ||
1884 | /* otherwise we must be sure not to step on | |
1885 | * any metadata, so stay: | |
1886 | * 36K beyond start of superblock | |
1887 | * beyond end of badblocks | |
1888 | * beyond write-intent bitmap | |
1889 | */ | |
1890 | if (rdev->sb_start + (32+4)*2 > new_offset) | |
1891 | return 0; | |
1892 | bitmap = rdev->mddev->bitmap; | |
1893 | if (bitmap && !rdev->mddev->bitmap_info.file && | |
1894 | rdev->sb_start + rdev->mddev->bitmap_info.offset + | |
1ec885cd | 1895 | bitmap->storage.file_pages * (PAGE_SIZE>>9) > new_offset) |
c6563a8c N |
1896 | return 0; |
1897 | if (rdev->badblocks.sector + rdev->badblocks.size > new_offset) | |
1898 | return 0; | |
1899 | ||
1900 | return 1; | |
0cd17fec | 1901 | } |
1da177e4 | 1902 | |
75c96f85 | 1903 | static struct super_type super_types[] = { |
1da177e4 LT |
1904 | [0] = { |
1905 | .name = "0.90.0", | |
1906 | .owner = THIS_MODULE, | |
0cd17fec CW |
1907 | .load_super = super_90_load, |
1908 | .validate_super = super_90_validate, | |
1909 | .sync_super = super_90_sync, | |
1910 | .rdev_size_change = super_90_rdev_size_change, | |
c6563a8c | 1911 | .allow_new_offset = super_90_allow_new_offset, |
1da177e4 LT |
1912 | }, |
1913 | [1] = { | |
1914 | .name = "md-1", | |
1915 | .owner = THIS_MODULE, | |
0cd17fec CW |
1916 | .load_super = super_1_load, |
1917 | .validate_super = super_1_validate, | |
1918 | .sync_super = super_1_sync, | |
1919 | .rdev_size_change = super_1_rdev_size_change, | |
c6563a8c | 1920 | .allow_new_offset = super_1_allow_new_offset, |
1da177e4 LT |
1921 | }, |
1922 | }; | |
1da177e4 | 1923 | |
fd01b88c | 1924 | static void sync_super(struct mddev *mddev, struct md_rdev *rdev) |
076f968b JB |
1925 | { |
1926 | if (mddev->sync_super) { | |
1927 | mddev->sync_super(mddev, rdev); | |
1928 | return; | |
1929 | } | |
1930 | ||
1931 | BUG_ON(mddev->major_version >= ARRAY_SIZE(super_types)); | |
1932 | ||
1933 | super_types[mddev->major_version].sync_super(mddev, rdev); | |
1934 | } | |
1935 | ||
fd01b88c | 1936 | static int match_mddev_units(struct mddev *mddev1, struct mddev *mddev2) |
1da177e4 | 1937 | { |
3cb03002 | 1938 | struct md_rdev *rdev, *rdev2; |
1da177e4 | 1939 | |
4b80991c | 1940 | rcu_read_lock(); |
0b020e85 SL |
1941 | rdev_for_each_rcu(rdev, mddev1) { |
1942 | if (test_bit(Faulty, &rdev->flags) || | |
1943 | test_bit(Journal, &rdev->flags) || | |
1944 | rdev->raid_disk == -1) | |
1945 | continue; | |
1946 | rdev_for_each_rcu(rdev2, mddev2) { | |
1947 | if (test_bit(Faulty, &rdev2->flags) || | |
1948 | test_bit(Journal, &rdev2->flags) || | |
1949 | rdev2->raid_disk == -1) | |
1950 | continue; | |
7dd5e7c3 | 1951 | if (rdev->bdev->bd_contains == |
4b80991c N |
1952 | rdev2->bdev->bd_contains) { |
1953 | rcu_read_unlock(); | |
7dd5e7c3 | 1954 | return 1; |
4b80991c | 1955 | } |
0b020e85 SL |
1956 | } |
1957 | } | |
4b80991c | 1958 | rcu_read_unlock(); |
1da177e4 LT |
1959 | return 0; |
1960 | } | |
1961 | ||
1962 | static LIST_HEAD(pending_raid_disks); | |
1963 | ||
ac5e7113 AN |
1964 | /* |
1965 | * Try to register data integrity profile for an mddev | |
1966 | * | |
1967 | * This is called when an array is started and after a disk has been kicked | |
1968 | * from the array. It only succeeds if all working and active component devices | |
1969 | * are integrity capable with matching profiles. | |
1970 | */ | |
fd01b88c | 1971 | int md_integrity_register(struct mddev *mddev) |
ac5e7113 | 1972 | { |
3cb03002 | 1973 | struct md_rdev *rdev, *reference = NULL; |
ac5e7113 AN |
1974 | |
1975 | if (list_empty(&mddev->disks)) | |
1976 | return 0; /* nothing to do */ | |
629acb6a JB |
1977 | if (!mddev->gendisk || blk_get_integrity(mddev->gendisk)) |
1978 | return 0; /* shouldn't register, or already is */ | |
dafb20fa | 1979 | rdev_for_each(rdev, mddev) { |
ac5e7113 AN |
1980 | /* skip spares and non-functional disks */ |
1981 | if (test_bit(Faulty, &rdev->flags)) | |
1982 | continue; | |
1983 | if (rdev->raid_disk < 0) | |
1984 | continue; | |
ac5e7113 AN |
1985 | if (!reference) { |
1986 | /* Use the first rdev as the reference */ | |
1987 | reference = rdev; | |
1988 | continue; | |
1989 | } | |
1990 | /* does this rdev's profile match the reference profile? */ | |
1991 | if (blk_integrity_compare(reference->bdev->bd_disk, | |
1992 | rdev->bdev->bd_disk) < 0) | |
1993 | return -EINVAL; | |
1994 | } | |
89078d57 MP |
1995 | if (!reference || !bdev_get_integrity(reference->bdev)) |
1996 | return 0; | |
ac5e7113 AN |
1997 | /* |
1998 | * All component devices are integrity capable and have matching | |
1999 | * profiles, register the common profile for the md device. | |
2000 | */ | |
25520d55 MP |
2001 | blk_integrity_register(mddev->gendisk, |
2002 | bdev_get_integrity(reference->bdev)); | |
2003 | ||
a91a2785 MP |
2004 | printk(KERN_NOTICE "md: data integrity enabled on %s\n", mdname(mddev)); |
2005 | if (bioset_integrity_create(mddev->bio_set, BIO_POOL_SIZE)) { | |
2006 | printk(KERN_ERR "md: failed to create integrity pool for %s\n", | |
2007 | mdname(mddev)); | |
2008 | return -EINVAL; | |
2009 | } | |
ac5e7113 AN |
2010 | return 0; |
2011 | } | |
2012 | EXPORT_SYMBOL(md_integrity_register); | |
2013 | ||
1501efad DW |
2014 | /* |
2015 | * Attempt to add an rdev, but only if it is consistent with the current | |
2016 | * integrity profile | |
2017 | */ | |
2018 | int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev) | |
3f9d99c1 | 2019 | { |
2863b9eb JB |
2020 | struct blk_integrity *bi_rdev; |
2021 | struct blk_integrity *bi_mddev; | |
1501efad | 2022 | char name[BDEVNAME_SIZE]; |
2863b9eb JB |
2023 | |
2024 | if (!mddev->gendisk) | |
1501efad | 2025 | return 0; |
2863b9eb JB |
2026 | |
2027 | bi_rdev = bdev_get_integrity(rdev->bdev); | |
2028 | bi_mddev = blk_get_integrity(mddev->gendisk); | |
3f9d99c1 | 2029 | |
ac5e7113 | 2030 | if (!bi_mddev) /* nothing to do */ |
1501efad DW |
2031 | return 0; |
2032 | ||
2033 | if (blk_integrity_compare(mddev->gendisk, rdev->bdev->bd_disk) != 0) { | |
2034 | printk(KERN_NOTICE "%s: incompatible integrity profile for %s\n", | |
2035 | mdname(mddev), bdevname(rdev->bdev, name)); | |
2036 | return -ENXIO; | |
2037 | } | |
2038 | ||
2039 | return 0; | |
3f9d99c1 | 2040 | } |
ac5e7113 | 2041 | EXPORT_SYMBOL(md_integrity_add_rdev); |
3f9d99c1 | 2042 | |
f72ffdd6 | 2043 | static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) |
1da177e4 | 2044 | { |
7dd5e7c3 | 2045 | char b[BDEVNAME_SIZE]; |
f637b9f9 | 2046 | struct kobject *ko; |
5e55e2f5 | 2047 | int err; |
1da177e4 | 2048 | |
11e2ede0 DW |
2049 | /* prevent duplicates */ |
2050 | if (find_rdev(mddev, rdev->bdev->bd_dev)) | |
2051 | return -EEXIST; | |
2052 | ||
dd8ac336 | 2053 | /* make sure rdev->sectors exceeds mddev->dev_sectors */ |
f6b6ec5c SL |
2054 | if (!test_bit(Journal, &rdev->flags) && |
2055 | rdev->sectors && | |
2056 | (mddev->dev_sectors == 0 || rdev->sectors < mddev->dev_sectors)) { | |
a778b73f N |
2057 | if (mddev->pers) { |
2058 | /* Cannot change size, so fail | |
2059 | * If mddev->level <= 0, then we don't care | |
2060 | * about aligning sizes (e.g. linear) | |
2061 | */ | |
2062 | if (mddev->level > 0) | |
2063 | return -ENOSPC; | |
2064 | } else | |
dd8ac336 | 2065 | mddev->dev_sectors = rdev->sectors; |
2bf071bf | 2066 | } |
1da177e4 LT |
2067 | |
2068 | /* Verify rdev->desc_nr is unique. | |
2069 | * If it is -1, assign a free number, else | |
2070 | * check number is not in use | |
2071 | */ | |
4878e9eb | 2072 | rcu_read_lock(); |
1da177e4 LT |
2073 | if (rdev->desc_nr < 0) { |
2074 | int choice = 0; | |
4878e9eb N |
2075 | if (mddev->pers) |
2076 | choice = mddev->raid_disks; | |
57d051dc | 2077 | while (md_find_rdev_nr_rcu(mddev, choice)) |
1da177e4 LT |
2078 | choice++; |
2079 | rdev->desc_nr = choice; | |
2080 | } else { | |
57d051dc | 2081 | if (md_find_rdev_nr_rcu(mddev, rdev->desc_nr)) { |
4878e9eb | 2082 | rcu_read_unlock(); |
1da177e4 | 2083 | return -EBUSY; |
4878e9eb | 2084 | } |
1da177e4 | 2085 | } |
4878e9eb | 2086 | rcu_read_unlock(); |
f6b6ec5c SL |
2087 | if (!test_bit(Journal, &rdev->flags) && |
2088 | mddev->max_disks && rdev->desc_nr >= mddev->max_disks) { | |
de01dfad N |
2089 | printk(KERN_WARNING "md: %s: array is limited to %d devices\n", |
2090 | mdname(mddev), mddev->max_disks); | |
2091 | return -EBUSY; | |
2092 | } | |
19133a42 | 2093 | bdevname(rdev->bdev,b); |
90a9befb | 2094 | strreplace(b, '/', '!'); |
649316b2 | 2095 | |
1da177e4 | 2096 | rdev->mddev = mddev; |
19133a42 | 2097 | printk(KERN_INFO "md: bind<%s>\n", b); |
86e6ffdd | 2098 | |
b2d6db58 | 2099 | if ((err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b))) |
5e55e2f5 | 2100 | goto fail; |
86e6ffdd | 2101 | |
0762b8bd | 2102 | ko = &part_to_dev(rdev->bdev->bd_part)->kobj; |
00bcb4ac N |
2103 | if (sysfs_create_link(&rdev->kobj, ko, "block")) |
2104 | /* failure here is OK */; | |
2105 | rdev->sysfs_state = sysfs_get_dirent_safe(rdev->kobj.sd, "state"); | |
3c0ee63a | 2106 | |
4b80991c | 2107 | list_add_rcu(&rdev->same_set, &mddev->disks); |
e09b457b | 2108 | bd_link_disk_holder(rdev->bdev, mddev->gendisk); |
4044ba58 N |
2109 | |
2110 | /* May as well allow recovery to be retried once */ | |
5389042f | 2111 | mddev->recovery_disabled++; |
3f9d99c1 | 2112 | |
1da177e4 | 2113 | return 0; |
5e55e2f5 N |
2114 | |
2115 | fail: | |
2116 | printk(KERN_WARNING "md: failed to register dev-%s for %s\n", | |
2117 | b, mdname(mddev)); | |
2118 | return err; | |
1da177e4 LT |
2119 | } |
2120 | ||
177a99b2 | 2121 | static void md_delayed_delete(struct work_struct *ws) |
5792a285 | 2122 | { |
3cb03002 | 2123 | struct md_rdev *rdev = container_of(ws, struct md_rdev, del_work); |
5792a285 | 2124 | kobject_del(&rdev->kobj); |
177a99b2 | 2125 | kobject_put(&rdev->kobj); |
5792a285 N |
2126 | } |
2127 | ||
f72ffdd6 | 2128 | static void unbind_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2129 | { |
2130 | char b[BDEVNAME_SIZE]; | |
403df478 | 2131 | |
49731baa | 2132 | bd_unlink_disk_holder(rdev->bdev, rdev->mddev->gendisk); |
4b80991c | 2133 | list_del_rcu(&rdev->same_set); |
1da177e4 LT |
2134 | printk(KERN_INFO "md: unbind<%s>\n", bdevname(rdev->bdev,b)); |
2135 | rdev->mddev = NULL; | |
86e6ffdd | 2136 | sysfs_remove_link(&rdev->kobj, "block"); |
3c0ee63a N |
2137 | sysfs_put(rdev->sysfs_state); |
2138 | rdev->sysfs_state = NULL; | |
2230dfe4 | 2139 | rdev->badblocks.count = 0; |
5792a285 | 2140 | /* We need to delay this, otherwise we can deadlock when |
4b80991c N |
2141 | * writing to 'remove' to "dev/state". We also need |
2142 | * to delay it due to rcu usage. | |
5792a285 | 2143 | */ |
4b80991c | 2144 | synchronize_rcu(); |
177a99b2 N |
2145 | INIT_WORK(&rdev->del_work, md_delayed_delete); |
2146 | kobject_get(&rdev->kobj); | |
e804ac78 | 2147 | queue_work(md_misc_wq, &rdev->del_work); |
1da177e4 LT |
2148 | } |
2149 | ||
2150 | /* | |
2151 | * prevent the device from being mounted, repartitioned or | |
2152 | * otherwise reused by a RAID array (or any other kernel | |
2153 | * subsystem), by bd_claiming the device. | |
2154 | */ | |
3cb03002 | 2155 | static int lock_rdev(struct md_rdev *rdev, dev_t dev, int shared) |
1da177e4 LT |
2156 | { |
2157 | int err = 0; | |
2158 | struct block_device *bdev; | |
2159 | char b[BDEVNAME_SIZE]; | |
2160 | ||
d4d77629 | 2161 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, |
3cb03002 | 2162 | shared ? (struct md_rdev *)lock_rdev : rdev); |
1da177e4 LT |
2163 | if (IS_ERR(bdev)) { |
2164 | printk(KERN_ERR "md: could not open %s.\n", | |
2165 | __bdevname(dev, b)); | |
2166 | return PTR_ERR(bdev); | |
2167 | } | |
1da177e4 LT |
2168 | rdev->bdev = bdev; |
2169 | return err; | |
2170 | } | |
2171 | ||
3cb03002 | 2172 | static void unlock_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2173 | { |
2174 | struct block_device *bdev = rdev->bdev; | |
2175 | rdev->bdev = NULL; | |
e525fd89 | 2176 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
1da177e4 LT |
2177 | } |
2178 | ||
2179 | void md_autodetect_dev(dev_t dev); | |
2180 | ||
f72ffdd6 | 2181 | static void export_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2182 | { |
2183 | char b[BDEVNAME_SIZE]; | |
403df478 | 2184 | |
1da177e4 LT |
2185 | printk(KERN_INFO "md: export_rdev(%s)\n", |
2186 | bdevname(rdev->bdev,b)); | |
545c8795 | 2187 | md_rdev_clear(rdev); |
1da177e4 | 2188 | #ifndef MODULE |
d0fae18f N |
2189 | if (test_bit(AutoDetected, &rdev->flags)) |
2190 | md_autodetect_dev(rdev->bdev->bd_dev); | |
1da177e4 LT |
2191 | #endif |
2192 | unlock_rdev(rdev); | |
86e6ffdd | 2193 | kobject_put(&rdev->kobj); |
1da177e4 LT |
2194 | } |
2195 | ||
fb56dfef | 2196 | void md_kick_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2197 | { |
2198 | unbind_rdev_from_array(rdev); | |
2199 | export_rdev(rdev); | |
2200 | } | |
fb56dfef | 2201 | EXPORT_SYMBOL_GPL(md_kick_rdev_from_array); |
1da177e4 | 2202 | |
fd01b88c | 2203 | static void export_array(struct mddev *mddev) |
1da177e4 | 2204 | { |
0638bb0e | 2205 | struct md_rdev *rdev; |
1da177e4 | 2206 | |
0638bb0e N |
2207 | while (!list_empty(&mddev->disks)) { |
2208 | rdev = list_first_entry(&mddev->disks, struct md_rdev, | |
2209 | same_set); | |
fb56dfef | 2210 | md_kick_rdev_from_array(rdev); |
1da177e4 | 2211 | } |
1da177e4 LT |
2212 | mddev->raid_disks = 0; |
2213 | mddev->major_version = 0; | |
2214 | } | |
2215 | ||
f72ffdd6 | 2216 | static void sync_sbs(struct mddev *mddev, int nospares) |
1da177e4 | 2217 | { |
42543769 N |
2218 | /* Update each superblock (in-memory image), but |
2219 | * if we are allowed to, skip spares which already | |
2220 | * have the right event counter, or have one earlier | |
2221 | * (which would mean they aren't being marked as dirty | |
2222 | * with the rest of the array) | |
2223 | */ | |
3cb03002 | 2224 | struct md_rdev *rdev; |
dafb20fa | 2225 | rdev_for_each(rdev, mddev) { |
42543769 N |
2226 | if (rdev->sb_events == mddev->events || |
2227 | (nospares && | |
2228 | rdev->raid_disk < 0 && | |
42543769 N |
2229 | rdev->sb_events+1 == mddev->events)) { |
2230 | /* Don't update this superblock */ | |
2231 | rdev->sb_loaded = 2; | |
2232 | } else { | |
076f968b | 2233 | sync_super(mddev, rdev); |
42543769 N |
2234 | rdev->sb_loaded = 1; |
2235 | } | |
1da177e4 LT |
2236 | } |
2237 | } | |
2238 | ||
2aa82191 GR |
2239 | static bool does_sb_need_changing(struct mddev *mddev) |
2240 | { | |
2241 | struct md_rdev *rdev; | |
2242 | struct mdp_superblock_1 *sb; | |
2243 | int role; | |
2244 | ||
2245 | /* Find a good rdev */ | |
2246 | rdev_for_each(rdev, mddev) | |
2247 | if ((rdev->raid_disk >= 0) && !test_bit(Faulty, &rdev->flags)) | |
2248 | break; | |
2249 | ||
2250 | /* No good device found. */ | |
2251 | if (!rdev) | |
2252 | return false; | |
2253 | ||
2254 | sb = page_address(rdev->sb_page); | |
2255 | /* Check if a device has become faulty or a spare become active */ | |
2256 | rdev_for_each(rdev, mddev) { | |
2257 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
2258 | /* Device activated? */ | |
2259 | if (role == 0xffff && rdev->raid_disk >=0 && | |
2260 | !test_bit(Faulty, &rdev->flags)) | |
2261 | return true; | |
2262 | /* Device turned faulty? */ | |
2263 | if (test_bit(Faulty, &rdev->flags) && (role < 0xfffd)) | |
2264 | return true; | |
2265 | } | |
2266 | ||
2267 | /* Check if any mddev parameters have changed */ | |
2268 | if ((mddev->dev_sectors != le64_to_cpu(sb->size)) || | |
2269 | (mddev->reshape_position != le64_to_cpu(sb->reshape_position)) || | |
2aa82191 GR |
2270 | (mddev->layout != le64_to_cpu(sb->layout)) || |
2271 | (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) || | |
2272 | (mddev->chunk_sectors != le32_to_cpu(sb->chunksize))) | |
2273 | return true; | |
2274 | ||
2275 | return false; | |
2276 | } | |
2277 | ||
1aee41f6 | 2278 | void md_update_sb(struct mddev *mddev, int force_change) |
1da177e4 | 2279 | { |
3cb03002 | 2280 | struct md_rdev *rdev; |
06d91a5f | 2281 | int sync_req; |
42543769 | 2282 | int nospares = 0; |
2699b672 | 2283 | int any_badblocks_changed = 0; |
23b63f9f | 2284 | int ret = -1; |
1da177e4 | 2285 | |
d87f064f N |
2286 | if (mddev->ro) { |
2287 | if (force_change) | |
2288 | set_bit(MD_CHANGE_DEVS, &mddev->flags); | |
2289 | return; | |
2290 | } | |
2aa82191 GR |
2291 | |
2292 | if (mddev_is_clustered(mddev)) { | |
2293 | if (test_and_clear_bit(MD_CHANGE_DEVS, &mddev->flags)) | |
2294 | force_change = 1; | |
23b63f9f | 2295 | ret = md_cluster_ops->metadata_update_start(mddev); |
2aa82191 GR |
2296 | /* Has someone else has updated the sb */ |
2297 | if (!does_sb_need_changing(mddev)) { | |
23b63f9f GJ |
2298 | if (ret == 0) |
2299 | md_cluster_ops->metadata_update_cancel(mddev); | |
2aa82191 GR |
2300 | clear_bit(MD_CHANGE_PENDING, &mddev->flags); |
2301 | return; | |
2302 | } | |
2303 | } | |
1da177e4 | 2304 | repeat: |
3a3a5ddb | 2305 | /* First make sure individual recovery_offsets are correct */ |
dafb20fa | 2306 | rdev_for_each(rdev, mddev) { |
3a3a5ddb N |
2307 | if (rdev->raid_disk >= 0 && |
2308 | mddev->delta_disks >= 0 && | |
f2076e7d | 2309 | !test_bit(Journal, &rdev->flags) && |
3a3a5ddb N |
2310 | !test_bit(In_sync, &rdev->flags) && |
2311 | mddev->curr_resync_completed > rdev->recovery_offset) | |
2312 | rdev->recovery_offset = mddev->curr_resync_completed; | |
2313 | ||
f72ffdd6 | 2314 | } |
bd52b746 | 2315 | if (!mddev->persistent) { |
070dc6dd | 2316 | clear_bit(MD_CHANGE_CLEAN, &mddev->flags); |
3a3a5ddb | 2317 | clear_bit(MD_CHANGE_DEVS, &mddev->flags); |
de393cde | 2318 | if (!mddev->external) { |
d97a41dc | 2319 | clear_bit(MD_CHANGE_PENDING, &mddev->flags); |
dafb20fa | 2320 | rdev_for_each(rdev, mddev) { |
de393cde | 2321 | if (rdev->badblocks.changed) { |
d0962936 | 2322 | rdev->badblocks.changed = 0; |
fc974ee2 | 2323 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2324 | md_error(mddev, rdev); |
2325 | } | |
2326 | clear_bit(Blocked, &rdev->flags); | |
2327 | clear_bit(BlockedBadBlocks, &rdev->flags); | |
2328 | wake_up(&rdev->blocked_wait); | |
2329 | } | |
2330 | } | |
3a3a5ddb N |
2331 | wake_up(&mddev->sb_wait); |
2332 | return; | |
2333 | } | |
2334 | ||
85572d7c | 2335 | spin_lock(&mddev->lock); |
84692195 | 2336 | |
9ebc6ef1 | 2337 | mddev->utime = ktime_get_real_seconds(); |
3a3a5ddb | 2338 | |
850b2b42 N |
2339 | if (test_and_clear_bit(MD_CHANGE_DEVS, &mddev->flags)) |
2340 | force_change = 1; | |
2341 | if (test_and_clear_bit(MD_CHANGE_CLEAN, &mddev->flags)) | |
2342 | /* just a clean<-> dirty transition, possibly leave spares alone, | |
2343 | * though if events isn't the right even/odd, we will have to do | |
2344 | * spares after all | |
2345 | */ | |
2346 | nospares = 1; | |
2347 | if (force_change) | |
2348 | nospares = 0; | |
2349 | if (mddev->degraded) | |
84692195 N |
2350 | /* If the array is degraded, then skipping spares is both |
2351 | * dangerous and fairly pointless. | |
2352 | * Dangerous because a device that was removed from the array | |
2353 | * might have a event_count that still looks up-to-date, | |
2354 | * so it can be re-added without a resync. | |
2355 | * Pointless because if there are any spares to skip, | |
2356 | * then a recovery will happen and soon that array won't | |
2357 | * be degraded any more and the spare can go back to sleep then. | |
2358 | */ | |
850b2b42 | 2359 | nospares = 0; |
84692195 | 2360 | |
06d91a5f | 2361 | sync_req = mddev->in_sync; |
42543769 N |
2362 | |
2363 | /* If this is just a dirty<->clean transition, and the array is clean | |
2364 | * and 'events' is odd, we can roll back to the previous clean state */ | |
850b2b42 | 2365 | if (nospares |
42543769 | 2366 | && (mddev->in_sync && mddev->recovery_cp == MaxSector) |
a8707c08 N |
2367 | && mddev->can_decrease_events |
2368 | && mddev->events != 1) { | |
42543769 | 2369 | mddev->events--; |
a8707c08 N |
2370 | mddev->can_decrease_events = 0; |
2371 | } else { | |
42543769 N |
2372 | /* otherwise we have to go forward and ... */ |
2373 | mddev->events ++; | |
a8707c08 | 2374 | mddev->can_decrease_events = nospares; |
42543769 | 2375 | } |
1da177e4 | 2376 | |
403df478 N |
2377 | /* |
2378 | * This 64-bit counter should never wrap. | |
2379 | * Either we are in around ~1 trillion A.C., assuming | |
2380 | * 1 reboot per second, or we have a bug... | |
2381 | */ | |
2382 | WARN_ON(mddev->events == 0); | |
2699b672 | 2383 | |
dafb20fa | 2384 | rdev_for_each(rdev, mddev) { |
2699b672 N |
2385 | if (rdev->badblocks.changed) |
2386 | any_badblocks_changed++; | |
de393cde N |
2387 | if (test_bit(Faulty, &rdev->flags)) |
2388 | set_bit(FaultRecorded, &rdev->flags); | |
2389 | } | |
2699b672 | 2390 | |
e691063a | 2391 | sync_sbs(mddev, nospares); |
85572d7c | 2392 | spin_unlock(&mddev->lock); |
1da177e4 | 2393 | |
36a4e1fe N |
2394 | pr_debug("md: updating %s RAID superblock on device (in sync %d)\n", |
2395 | mdname(mddev), mddev->in_sync); | |
1da177e4 | 2396 | |
4ad13663 | 2397 | bitmap_update_sb(mddev->bitmap); |
dafb20fa | 2398 | rdev_for_each(rdev, mddev) { |
1da177e4 | 2399 | char b[BDEVNAME_SIZE]; |
36a4e1fe | 2400 | |
42543769 N |
2401 | if (rdev->sb_loaded != 1) |
2402 | continue; /* no noise on spare devices */ | |
1da177e4 | 2403 | |
f466722c | 2404 | if (!test_bit(Faulty, &rdev->flags)) { |
7bfa19f2 | 2405 | md_super_write(mddev,rdev, |
0f420358 | 2406 | rdev->sb_start, rdev->sb_size, |
7bfa19f2 | 2407 | rdev->sb_page); |
36a4e1fe N |
2408 | pr_debug("md: (write) %s's sb offset: %llu\n", |
2409 | bdevname(rdev->bdev, b), | |
2410 | (unsigned long long)rdev->sb_start); | |
42543769 | 2411 | rdev->sb_events = mddev->events; |
2699b672 N |
2412 | if (rdev->badblocks.size) { |
2413 | md_super_write(mddev, rdev, | |
2414 | rdev->badblocks.sector, | |
2415 | rdev->badblocks.size << 9, | |
2416 | rdev->bb_page); | |
2417 | rdev->badblocks.size = 0; | |
2418 | } | |
7bfa19f2 | 2419 | |
f466722c | 2420 | } else |
36a4e1fe N |
2421 | pr_debug("md: %s (skipping faulty)\n", |
2422 | bdevname(rdev->bdev, b)); | |
d70ed2e4 | 2423 | |
7bfa19f2 | 2424 | if (mddev->level == LEVEL_MULTIPATH) |
1da177e4 LT |
2425 | /* only need to write one superblock... */ |
2426 | break; | |
2427 | } | |
a9701a30 | 2428 | md_super_wait(mddev); |
850b2b42 | 2429 | /* if there was a failure, MD_CHANGE_DEVS was set, and we re-write super */ |
7bfa19f2 | 2430 | |
85572d7c | 2431 | spin_lock(&mddev->lock); |
850b2b42 N |
2432 | if (mddev->in_sync != sync_req || |
2433 | test_bit(MD_CHANGE_DEVS, &mddev->flags)) { | |
06d91a5f | 2434 | /* have to write it out again */ |
85572d7c | 2435 | spin_unlock(&mddev->lock); |
06d91a5f N |
2436 | goto repeat; |
2437 | } | |
850b2b42 | 2438 | clear_bit(MD_CHANGE_PENDING, &mddev->flags); |
85572d7c | 2439 | spin_unlock(&mddev->lock); |
3d310eb7 | 2440 | wake_up(&mddev->sb_wait); |
acb180b0 N |
2441 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
2442 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); | |
06d91a5f | 2443 | |
dafb20fa | 2444 | rdev_for_each(rdev, mddev) { |
de393cde N |
2445 | if (test_and_clear_bit(FaultRecorded, &rdev->flags)) |
2446 | clear_bit(Blocked, &rdev->flags); | |
2447 | ||
2448 | if (any_badblocks_changed) | |
fc974ee2 | 2449 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2450 | clear_bit(BlockedBadBlocks, &rdev->flags); |
2451 | wake_up(&rdev->blocked_wait); | |
2452 | } | |
2aa82191 | 2453 | |
23b63f9f | 2454 | if (mddev_is_clustered(mddev) && ret == 0) |
2aa82191 | 2455 | md_cluster_ops->metadata_update_finish(mddev); |
1da177e4 | 2456 | } |
1aee41f6 | 2457 | EXPORT_SYMBOL(md_update_sb); |
1da177e4 | 2458 | |
a6da4ef8 GR |
2459 | static int add_bound_rdev(struct md_rdev *rdev) |
2460 | { | |
2461 | struct mddev *mddev = rdev->mddev; | |
2462 | int err = 0; | |
87d4d916 | 2463 | bool add_journal = test_bit(Journal, &rdev->flags); |
a6da4ef8 | 2464 | |
87d4d916 | 2465 | if (!mddev->pers->hot_remove_disk || add_journal) { |
a6da4ef8 GR |
2466 | /* If there is hot_add_disk but no hot_remove_disk |
2467 | * then added disks for geometry changes, | |
2468 | * and should be added immediately. | |
2469 | */ | |
2470 | super_types[mddev->major_version]. | |
2471 | validate_super(mddev, rdev); | |
87d4d916 SL |
2472 | if (add_journal) |
2473 | mddev_suspend(mddev); | |
a6da4ef8 | 2474 | err = mddev->pers->hot_add_disk(mddev, rdev); |
87d4d916 SL |
2475 | if (add_journal) |
2476 | mddev_resume(mddev); | |
a6da4ef8 GR |
2477 | if (err) { |
2478 | unbind_rdev_from_array(rdev); | |
2479 | export_rdev(rdev); | |
2480 | return err; | |
2481 | } | |
2482 | } | |
2483 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2484 | ||
2485 | set_bit(MD_CHANGE_DEVS, &mddev->flags); | |
2486 | if (mddev->degraded) | |
2487 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
2488 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
2489 | md_new_event(mddev); | |
2490 | md_wakeup_thread(mddev->thread); | |
2491 | return 0; | |
2492 | } | |
1da177e4 | 2493 | |
7f6ce769 | 2494 | /* words written to sysfs files may, or may not, be \n terminated. |
bce74dac N |
2495 | * We want to accept with case. For this we use cmd_match. |
2496 | */ | |
2497 | static int cmd_match(const char *cmd, const char *str) | |
2498 | { | |
2499 | /* See if cmd, written into a sysfs file, matches | |
2500 | * str. They must either be the same, or cmd can | |
2501 | * have a trailing newline | |
2502 | */ | |
2503 | while (*cmd && *str && *cmd == *str) { | |
2504 | cmd++; | |
2505 | str++; | |
2506 | } | |
2507 | if (*cmd == '\n') | |
2508 | cmd++; | |
2509 | if (*str || *cmd) | |
2510 | return 0; | |
2511 | return 1; | |
2512 | } | |
2513 | ||
86e6ffdd N |
2514 | struct rdev_sysfs_entry { |
2515 | struct attribute attr; | |
3cb03002 N |
2516 | ssize_t (*show)(struct md_rdev *, char *); |
2517 | ssize_t (*store)(struct md_rdev *, const char *, size_t); | |
86e6ffdd N |
2518 | }; |
2519 | ||
2520 | static ssize_t | |
3cb03002 | 2521 | state_show(struct md_rdev *rdev, char *page) |
86e6ffdd N |
2522 | { |
2523 | char *sep = ""; | |
20a49ff6 | 2524 | size_t len = 0; |
758bfc8a | 2525 | unsigned long flags = ACCESS_ONCE(rdev->flags); |
86e6ffdd | 2526 | |
758bfc8a | 2527 | if (test_bit(Faulty, &flags) || |
de393cde | 2528 | rdev->badblocks.unacked_exist) { |
86e6ffdd N |
2529 | len+= sprintf(page+len, "%sfaulty",sep); |
2530 | sep = ","; | |
2531 | } | |
758bfc8a | 2532 | if (test_bit(In_sync, &flags)) { |
86e6ffdd N |
2533 | len += sprintf(page+len, "%sin_sync",sep); |
2534 | sep = ","; | |
2535 | } | |
ac6096e9 SL |
2536 | if (test_bit(Journal, &flags)) { |
2537 | len += sprintf(page+len, "%sjournal",sep); | |
2538 | sep = ","; | |
2539 | } | |
758bfc8a | 2540 | if (test_bit(WriteMostly, &flags)) { |
f655675b N |
2541 | len += sprintf(page+len, "%swrite_mostly",sep); |
2542 | sep = ","; | |
2543 | } | |
758bfc8a | 2544 | if (test_bit(Blocked, &flags) || |
52c64152 | 2545 | (rdev->badblocks.unacked_exist |
758bfc8a | 2546 | && !test_bit(Faulty, &flags))) { |
6bfe0b49 DW |
2547 | len += sprintf(page+len, "%sblocked", sep); |
2548 | sep = ","; | |
2549 | } | |
758bfc8a | 2550 | if (!test_bit(Faulty, &flags) && |
f2076e7d | 2551 | !test_bit(Journal, &flags) && |
758bfc8a | 2552 | !test_bit(In_sync, &flags)) { |
86e6ffdd N |
2553 | len += sprintf(page+len, "%sspare", sep); |
2554 | sep = ","; | |
2555 | } | |
758bfc8a | 2556 | if (test_bit(WriteErrorSeen, &flags)) { |
d7a9d443 N |
2557 | len += sprintf(page+len, "%swrite_error", sep); |
2558 | sep = ","; | |
2559 | } | |
758bfc8a | 2560 | if (test_bit(WantReplacement, &flags)) { |
2d78f8c4 N |
2561 | len += sprintf(page+len, "%swant_replacement", sep); |
2562 | sep = ","; | |
2563 | } | |
758bfc8a | 2564 | if (test_bit(Replacement, &flags)) { |
2d78f8c4 N |
2565 | len += sprintf(page+len, "%sreplacement", sep); |
2566 | sep = ","; | |
2567 | } | |
2568 | ||
86e6ffdd N |
2569 | return len+sprintf(page+len, "\n"); |
2570 | } | |
2571 | ||
45dc2de1 | 2572 | static ssize_t |
3cb03002 | 2573 | state_store(struct md_rdev *rdev, const char *buf, size_t len) |
45dc2de1 N |
2574 | { |
2575 | /* can write | |
de393cde | 2576 | * faulty - simulates an error |
45dc2de1 | 2577 | * remove - disconnects the device |
f655675b N |
2578 | * writemostly - sets write_mostly |
2579 | * -writemostly - clears write_mostly | |
de393cde N |
2580 | * blocked - sets the Blocked flags |
2581 | * -blocked - clears the Blocked and possibly simulates an error | |
6d56e278 | 2582 | * insync - sets Insync providing device isn't active |
f466722c N |
2583 | * -insync - clear Insync for a device with a slot assigned, |
2584 | * so that it gets rebuilt based on bitmap | |
d7a9d443 N |
2585 | * write_error - sets WriteErrorSeen |
2586 | * -write_error - clears WriteErrorSeen | |
45dc2de1 N |
2587 | */ |
2588 | int err = -EINVAL; | |
2589 | if (cmd_match(buf, "faulty") && rdev->mddev->pers) { | |
2590 | md_error(rdev->mddev, rdev); | |
5ef56c8f N |
2591 | if (test_bit(Faulty, &rdev->flags)) |
2592 | err = 0; | |
2593 | else | |
2594 | err = -EBUSY; | |
45dc2de1 N |
2595 | } else if (cmd_match(buf, "remove")) { |
2596 | if (rdev->raid_disk >= 0) | |
2597 | err = -EBUSY; | |
2598 | else { | |
fd01b88c | 2599 | struct mddev *mddev = rdev->mddev; |
45dc2de1 | 2600 | err = 0; |
a9720903 GJ |
2601 | if (mddev_is_clustered(mddev)) |
2602 | err = md_cluster_ops->remove_disk(mddev, rdev); | |
2603 | ||
2604 | if (err == 0) { | |
2605 | md_kick_rdev_from_array(rdev); | |
2606 | if (mddev->pers) | |
2607 | md_update_sb(mddev, 1); | |
2608 | md_new_event(mddev); | |
2609 | } | |
45dc2de1 | 2610 | } |
f655675b N |
2611 | } else if (cmd_match(buf, "writemostly")) { |
2612 | set_bit(WriteMostly, &rdev->flags); | |
2613 | err = 0; | |
2614 | } else if (cmd_match(buf, "-writemostly")) { | |
2615 | clear_bit(WriteMostly, &rdev->flags); | |
6bfe0b49 DW |
2616 | err = 0; |
2617 | } else if (cmd_match(buf, "blocked")) { | |
2618 | set_bit(Blocked, &rdev->flags); | |
2619 | err = 0; | |
2620 | } else if (cmd_match(buf, "-blocked")) { | |
de393cde | 2621 | if (!test_bit(Faulty, &rdev->flags) && |
7da64a0a | 2622 | rdev->badblocks.unacked_exist) { |
de393cde N |
2623 | /* metadata handler doesn't understand badblocks, |
2624 | * so we need to fail the device | |
2625 | */ | |
2626 | md_error(rdev->mddev, rdev); | |
2627 | } | |
6bfe0b49 | 2628 | clear_bit(Blocked, &rdev->flags); |
de393cde | 2629 | clear_bit(BlockedBadBlocks, &rdev->flags); |
6bfe0b49 DW |
2630 | wake_up(&rdev->blocked_wait); |
2631 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
2632 | md_wakeup_thread(rdev->mddev->thread); | |
2633 | ||
6d56e278 N |
2634 | err = 0; |
2635 | } else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) { | |
2636 | set_bit(In_sync, &rdev->flags); | |
f655675b | 2637 | err = 0; |
f2076e7d SL |
2638 | } else if (cmd_match(buf, "-insync") && rdev->raid_disk >= 0 && |
2639 | !test_bit(Journal, &rdev->flags)) { | |
e1960f8c N |
2640 | if (rdev->mddev->pers == NULL) { |
2641 | clear_bit(In_sync, &rdev->flags); | |
2642 | rdev->saved_raid_disk = rdev->raid_disk; | |
2643 | rdev->raid_disk = -1; | |
2644 | err = 0; | |
2645 | } | |
d7a9d443 N |
2646 | } else if (cmd_match(buf, "write_error")) { |
2647 | set_bit(WriteErrorSeen, &rdev->flags); | |
2648 | err = 0; | |
2649 | } else if (cmd_match(buf, "-write_error")) { | |
2650 | clear_bit(WriteErrorSeen, &rdev->flags); | |
2651 | err = 0; | |
2d78f8c4 N |
2652 | } else if (cmd_match(buf, "want_replacement")) { |
2653 | /* Any non-spare device that is not a replacement can | |
2654 | * become want_replacement at any time, but we then need to | |
2655 | * check if recovery is needed. | |
2656 | */ | |
2657 | if (rdev->raid_disk >= 0 && | |
f2076e7d | 2658 | !test_bit(Journal, &rdev->flags) && |
2d78f8c4 N |
2659 | !test_bit(Replacement, &rdev->flags)) |
2660 | set_bit(WantReplacement, &rdev->flags); | |
2661 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
2662 | md_wakeup_thread(rdev->mddev->thread); | |
2663 | err = 0; | |
2664 | } else if (cmd_match(buf, "-want_replacement")) { | |
2665 | /* Clearing 'want_replacement' is always allowed. | |
2666 | * Once replacements starts it is too late though. | |
2667 | */ | |
2668 | err = 0; | |
2669 | clear_bit(WantReplacement, &rdev->flags); | |
2670 | } else if (cmd_match(buf, "replacement")) { | |
2671 | /* Can only set a device as a replacement when array has not | |
2672 | * yet been started. Once running, replacement is automatic | |
2673 | * from spares, or by assigning 'slot'. | |
2674 | */ | |
2675 | if (rdev->mddev->pers) | |
2676 | err = -EBUSY; | |
2677 | else { | |
2678 | set_bit(Replacement, &rdev->flags); | |
2679 | err = 0; | |
2680 | } | |
2681 | } else if (cmd_match(buf, "-replacement")) { | |
2682 | /* Similarly, can only clear Replacement before start */ | |
2683 | if (rdev->mddev->pers) | |
2684 | err = -EBUSY; | |
2685 | else { | |
2686 | clear_bit(Replacement, &rdev->flags); | |
2687 | err = 0; | |
2688 | } | |
a6da4ef8 GR |
2689 | } else if (cmd_match(buf, "re-add")) { |
2690 | if (test_bit(Faulty, &rdev->flags) && (rdev->raid_disk == -1)) { | |
97f6cd39 GR |
2691 | /* clear_bit is performed _after_ all the devices |
2692 | * have their local Faulty bit cleared. If any writes | |
2693 | * happen in the meantime in the local node, they | |
2694 | * will land in the local bitmap, which will be synced | |
2695 | * by this node eventually | |
2696 | */ | |
2697 | if (!mddev_is_clustered(rdev->mddev) || | |
2698 | (err = md_cluster_ops->gather_bitmaps(rdev)) == 0) { | |
2699 | clear_bit(Faulty, &rdev->flags); | |
2700 | err = add_bound_rdev(rdev); | |
2701 | } | |
a6da4ef8 GR |
2702 | } else |
2703 | err = -EBUSY; | |
45dc2de1 | 2704 | } |
00bcb4ac N |
2705 | if (!err) |
2706 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
45dc2de1 N |
2707 | return err ? err : len; |
2708 | } | |
80ca3a44 | 2709 | static struct rdev_sysfs_entry rdev_state = |
750f199e | 2710 | __ATTR_PREALLOC(state, S_IRUGO|S_IWUSR, state_show, state_store); |
86e6ffdd | 2711 | |
4dbcdc75 | 2712 | static ssize_t |
3cb03002 | 2713 | errors_show(struct md_rdev *rdev, char *page) |
4dbcdc75 N |
2714 | { |
2715 | return sprintf(page, "%d\n", atomic_read(&rdev->corrected_errors)); | |
2716 | } | |
2717 | ||
2718 | static ssize_t | |
3cb03002 | 2719 | errors_store(struct md_rdev *rdev, const char *buf, size_t len) |
4dbcdc75 | 2720 | { |
4c9309c0 AD |
2721 | unsigned int n; |
2722 | int rv; | |
2723 | ||
2724 | rv = kstrtouint(buf, 10, &n); | |
2725 | if (rv < 0) | |
2726 | return rv; | |
2727 | atomic_set(&rdev->corrected_errors, n); | |
2728 | return len; | |
4dbcdc75 N |
2729 | } |
2730 | static struct rdev_sysfs_entry rdev_errors = | |
80ca3a44 | 2731 | __ATTR(errors, S_IRUGO|S_IWUSR, errors_show, errors_store); |
4dbcdc75 | 2732 | |
014236d2 | 2733 | static ssize_t |
3cb03002 | 2734 | slot_show(struct md_rdev *rdev, char *page) |
014236d2 | 2735 | { |
f2076e7d SL |
2736 | if (test_bit(Journal, &rdev->flags)) |
2737 | return sprintf(page, "journal\n"); | |
2738 | else if (rdev->raid_disk < 0) | |
014236d2 N |
2739 | return sprintf(page, "none\n"); |
2740 | else | |
2741 | return sprintf(page, "%d\n", rdev->raid_disk); | |
2742 | } | |
2743 | ||
2744 | static ssize_t | |
3cb03002 | 2745 | slot_store(struct md_rdev *rdev, const char *buf, size_t len) |
014236d2 | 2746 | { |
4c9309c0 | 2747 | int slot; |
c303da6d | 2748 | int err; |
4c9309c0 | 2749 | |
f2076e7d SL |
2750 | if (test_bit(Journal, &rdev->flags)) |
2751 | return -EBUSY; | |
014236d2 N |
2752 | if (strncmp(buf, "none", 4)==0) |
2753 | slot = -1; | |
4c9309c0 AD |
2754 | else { |
2755 | err = kstrtouint(buf, 10, (unsigned int *)&slot); | |
2756 | if (err < 0) | |
2757 | return err; | |
2758 | } | |
6c2fce2e | 2759 | if (rdev->mddev->pers && slot == -1) { |
c303da6d N |
2760 | /* Setting 'slot' on an active array requires also |
2761 | * updating the 'rd%d' link, and communicating | |
2762 | * with the personality with ->hot_*_disk. | |
2763 | * For now we only support removing | |
2764 | * failed/spare devices. This normally happens automatically, | |
2765 | * but not when the metadata is externally managed. | |
2766 | */ | |
c303da6d N |
2767 | if (rdev->raid_disk == -1) |
2768 | return -EEXIST; | |
2769 | /* personality does all needed checks */ | |
01393f3d | 2770 | if (rdev->mddev->pers->hot_remove_disk == NULL) |
c303da6d | 2771 | return -EINVAL; |
746d3207 N |
2772 | clear_bit(Blocked, &rdev->flags); |
2773 | remove_and_add_spares(rdev->mddev, rdev); | |
2774 | if (rdev->raid_disk >= 0) | |
2775 | return -EBUSY; | |
c303da6d N |
2776 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); |
2777 | md_wakeup_thread(rdev->mddev->thread); | |
6c2fce2e | 2778 | } else if (rdev->mddev->pers) { |
6c2fce2e | 2779 | /* Activating a spare .. or possibly reactivating |
6d56e278 | 2780 | * if we ever get bitmaps working here. |
6c2fce2e | 2781 | */ |
cb01c549 | 2782 | int err; |
6c2fce2e NB |
2783 | |
2784 | if (rdev->raid_disk != -1) | |
2785 | return -EBUSY; | |
2786 | ||
c6751b2b N |
2787 | if (test_bit(MD_RECOVERY_RUNNING, &rdev->mddev->recovery)) |
2788 | return -EBUSY; | |
2789 | ||
6c2fce2e NB |
2790 | if (rdev->mddev->pers->hot_add_disk == NULL) |
2791 | return -EINVAL; | |
2792 | ||
ba1b41b6 N |
2793 | if (slot >= rdev->mddev->raid_disks && |
2794 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
2795 | return -ENOSPC; | |
2796 | ||
6c2fce2e NB |
2797 | rdev->raid_disk = slot; |
2798 | if (test_bit(In_sync, &rdev->flags)) | |
2799 | rdev->saved_raid_disk = slot; | |
2800 | else | |
2801 | rdev->saved_raid_disk = -1; | |
d30519fc | 2802 | clear_bit(In_sync, &rdev->flags); |
8313b8e5 | 2803 | clear_bit(Bitmap_sync, &rdev->flags); |
cb01c549 GR |
2804 | err = rdev->mddev->pers-> |
2805 | hot_add_disk(rdev->mddev, rdev); | |
2806 | if (err) { | |
2807 | rdev->raid_disk = -1; | |
2808 | return err; | |
2809 | } else | |
2810 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2811 | if (sysfs_link_rdev(rdev->mddev, rdev)) | |
2812 | /* failure here is OK */; | |
6c2fce2e | 2813 | /* don't wakeup anyone, leave that to userspace. */ |
c303da6d | 2814 | } else { |
ba1b41b6 N |
2815 | if (slot >= rdev->mddev->raid_disks && |
2816 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
c303da6d N |
2817 | return -ENOSPC; |
2818 | rdev->raid_disk = slot; | |
2819 | /* assume it is working */ | |
c5d79adb N |
2820 | clear_bit(Faulty, &rdev->flags); |
2821 | clear_bit(WriteMostly, &rdev->flags); | |
c303da6d | 2822 | set_bit(In_sync, &rdev->flags); |
00bcb4ac | 2823 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
c303da6d | 2824 | } |
014236d2 N |
2825 | return len; |
2826 | } | |
2827 | ||
014236d2 | 2828 | static struct rdev_sysfs_entry rdev_slot = |
80ca3a44 | 2829 | __ATTR(slot, S_IRUGO|S_IWUSR, slot_show, slot_store); |
014236d2 | 2830 | |
93c8cad0 | 2831 | static ssize_t |
3cb03002 | 2832 | offset_show(struct md_rdev *rdev, char *page) |
93c8cad0 | 2833 | { |
6961ece4 | 2834 | return sprintf(page, "%llu\n", (unsigned long long)rdev->data_offset); |
93c8cad0 N |
2835 | } |
2836 | ||
2837 | static ssize_t | |
3cb03002 | 2838 | offset_store(struct md_rdev *rdev, const char *buf, size_t len) |
93c8cad0 | 2839 | { |
c6563a8c | 2840 | unsigned long long offset; |
b29bebd6 | 2841 | if (kstrtoull(buf, 10, &offset) < 0) |
93c8cad0 | 2842 | return -EINVAL; |
8ed0a521 | 2843 | if (rdev->mddev->pers && rdev->raid_disk >= 0) |
93c8cad0 | 2844 | return -EBUSY; |
dd8ac336 | 2845 | if (rdev->sectors && rdev->mddev->external) |
c5d79adb N |
2846 | /* Must set offset before size, so overlap checks |
2847 | * can be sane */ | |
2848 | return -EBUSY; | |
93c8cad0 | 2849 | rdev->data_offset = offset; |
25f7fd47 | 2850 | rdev->new_data_offset = offset; |
93c8cad0 N |
2851 | return len; |
2852 | } | |
2853 | ||
2854 | static struct rdev_sysfs_entry rdev_offset = | |
80ca3a44 | 2855 | __ATTR(offset, S_IRUGO|S_IWUSR, offset_show, offset_store); |
93c8cad0 | 2856 | |
c6563a8c N |
2857 | static ssize_t new_offset_show(struct md_rdev *rdev, char *page) |
2858 | { | |
2859 | return sprintf(page, "%llu\n", | |
2860 | (unsigned long long)rdev->new_data_offset); | |
2861 | } | |
2862 | ||
2863 | static ssize_t new_offset_store(struct md_rdev *rdev, | |
2864 | const char *buf, size_t len) | |
2865 | { | |
2866 | unsigned long long new_offset; | |
2867 | struct mddev *mddev = rdev->mddev; | |
2868 | ||
b29bebd6 | 2869 | if (kstrtoull(buf, 10, &new_offset) < 0) |
c6563a8c N |
2870 | return -EINVAL; |
2871 | ||
f851b60d N |
2872 | if (mddev->sync_thread || |
2873 | test_bit(MD_RECOVERY_RUNNING,&mddev->recovery)) | |
c6563a8c N |
2874 | return -EBUSY; |
2875 | if (new_offset == rdev->data_offset) | |
2876 | /* reset is always permitted */ | |
2877 | ; | |
2878 | else if (new_offset > rdev->data_offset) { | |
2879 | /* must not push array size beyond rdev_sectors */ | |
2880 | if (new_offset - rdev->data_offset | |
2881 | + mddev->dev_sectors > rdev->sectors) | |
2882 | return -E2BIG; | |
2883 | } | |
2884 | /* Metadata worries about other space details. */ | |
2885 | ||
2886 | /* decreasing the offset is inconsistent with a backwards | |
2887 | * reshape. | |
2888 | */ | |
2889 | if (new_offset < rdev->data_offset && | |
2890 | mddev->reshape_backwards) | |
2891 | return -EINVAL; | |
2892 | /* Increasing offset is inconsistent with forwards | |
2893 | * reshape. reshape_direction should be set to | |
2894 | * 'backwards' first. | |
2895 | */ | |
2896 | if (new_offset > rdev->data_offset && | |
2897 | !mddev->reshape_backwards) | |
2898 | return -EINVAL; | |
2899 | ||
2900 | if (mddev->pers && mddev->persistent && | |
2901 | !super_types[mddev->major_version] | |
2902 | .allow_new_offset(rdev, new_offset)) | |
2903 | return -E2BIG; | |
2904 | rdev->new_data_offset = new_offset; | |
2905 | if (new_offset > rdev->data_offset) | |
2906 | mddev->reshape_backwards = 1; | |
2907 | else if (new_offset < rdev->data_offset) | |
2908 | mddev->reshape_backwards = 0; | |
2909 | ||
2910 | return len; | |
2911 | } | |
2912 | static struct rdev_sysfs_entry rdev_new_offset = | |
2913 | __ATTR(new_offset, S_IRUGO|S_IWUSR, new_offset_show, new_offset_store); | |
2914 | ||
83303b61 | 2915 | static ssize_t |
3cb03002 | 2916 | rdev_size_show(struct md_rdev *rdev, char *page) |
83303b61 | 2917 | { |
dd8ac336 | 2918 | return sprintf(page, "%llu\n", (unsigned long long)rdev->sectors / 2); |
83303b61 N |
2919 | } |
2920 | ||
c5d79adb N |
2921 | static int overlaps(sector_t s1, sector_t l1, sector_t s2, sector_t l2) |
2922 | { | |
2923 | /* check if two start/length pairs overlap */ | |
2924 | if (s1+l1 <= s2) | |
2925 | return 0; | |
2926 | if (s2+l2 <= s1) | |
2927 | return 0; | |
2928 | return 1; | |
2929 | } | |
2930 | ||
b522adcd DW |
2931 | static int strict_blocks_to_sectors(const char *buf, sector_t *sectors) |
2932 | { | |
2933 | unsigned long long blocks; | |
2934 | sector_t new; | |
2935 | ||
b29bebd6 | 2936 | if (kstrtoull(buf, 10, &blocks) < 0) |
b522adcd DW |
2937 | return -EINVAL; |
2938 | ||
2939 | if (blocks & 1ULL << (8 * sizeof(blocks) - 1)) | |
2940 | return -EINVAL; /* sector conversion overflow */ | |
2941 | ||
2942 | new = blocks * 2; | |
2943 | if (new != blocks * 2) | |
2944 | return -EINVAL; /* unsigned long long to sector_t overflow */ | |
2945 | ||
2946 | *sectors = new; | |
2947 | return 0; | |
2948 | } | |
2949 | ||
83303b61 | 2950 | static ssize_t |
3cb03002 | 2951 | rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len) |
83303b61 | 2952 | { |
fd01b88c | 2953 | struct mddev *my_mddev = rdev->mddev; |
dd8ac336 | 2954 | sector_t oldsectors = rdev->sectors; |
b522adcd | 2955 | sector_t sectors; |
27c529bb | 2956 | |
f2076e7d SL |
2957 | if (test_bit(Journal, &rdev->flags)) |
2958 | return -EBUSY; | |
b522adcd | 2959 | if (strict_blocks_to_sectors(buf, §ors) < 0) |
d7027458 | 2960 | return -EINVAL; |
c6563a8c N |
2961 | if (rdev->data_offset != rdev->new_data_offset) |
2962 | return -EINVAL; /* too confusing */ | |
0cd17fec | 2963 | if (my_mddev->pers && rdev->raid_disk >= 0) { |
d7027458 | 2964 | if (my_mddev->persistent) { |
dd8ac336 AN |
2965 | sectors = super_types[my_mddev->major_version]. |
2966 | rdev_size_change(rdev, sectors); | |
2967 | if (!sectors) | |
0cd17fec | 2968 | return -EBUSY; |
dd8ac336 | 2969 | } else if (!sectors) |
77304d2a | 2970 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9) - |
dd8ac336 | 2971 | rdev->data_offset; |
a6468539 N |
2972 | if (!my_mddev->pers->resize) |
2973 | /* Cannot change size for RAID0 or Linear etc */ | |
2974 | return -EINVAL; | |
0cd17fec | 2975 | } |
dd8ac336 | 2976 | if (sectors < my_mddev->dev_sectors) |
7d3c6f87 | 2977 | return -EINVAL; /* component must fit device */ |
0cd17fec | 2978 | |
dd8ac336 AN |
2979 | rdev->sectors = sectors; |
2980 | if (sectors > oldsectors && my_mddev->external) { | |
8b1afc3d N |
2981 | /* Need to check that all other rdevs with the same |
2982 | * ->bdev do not overlap. 'rcu' is sufficient to walk | |
2983 | * the rdev lists safely. | |
2984 | * This check does not provide a hard guarantee, it | |
2985 | * just helps avoid dangerous mistakes. | |
c5d79adb | 2986 | */ |
fd01b88c | 2987 | struct mddev *mddev; |
c5d79adb | 2988 | int overlap = 0; |
159ec1fc | 2989 | struct list_head *tmp; |
c5d79adb | 2990 | |
8b1afc3d | 2991 | rcu_read_lock(); |
29ac4aa3 | 2992 | for_each_mddev(mddev, tmp) { |
3cb03002 | 2993 | struct md_rdev *rdev2; |
c5d79adb | 2994 | |
dafb20fa | 2995 | rdev_for_each(rdev2, mddev) |
f21e9ff7 N |
2996 | if (rdev->bdev == rdev2->bdev && |
2997 | rdev != rdev2 && | |
2998 | overlaps(rdev->data_offset, rdev->sectors, | |
2999 | rdev2->data_offset, | |
3000 | rdev2->sectors)) { | |
c5d79adb N |
3001 | overlap = 1; |
3002 | break; | |
3003 | } | |
c5d79adb N |
3004 | if (overlap) { |
3005 | mddev_put(mddev); | |
3006 | break; | |
3007 | } | |
3008 | } | |
8b1afc3d | 3009 | rcu_read_unlock(); |
c5d79adb N |
3010 | if (overlap) { |
3011 | /* Someone else could have slipped in a size | |
3012 | * change here, but doing so is just silly. | |
dd8ac336 | 3013 | * We put oldsectors back because we *know* it is |
c5d79adb N |
3014 | * safe, and trust userspace not to race with |
3015 | * itself | |
3016 | */ | |
dd8ac336 | 3017 | rdev->sectors = oldsectors; |
c5d79adb N |
3018 | return -EBUSY; |
3019 | } | |
3020 | } | |
83303b61 N |
3021 | return len; |
3022 | } | |
3023 | ||
3024 | static struct rdev_sysfs_entry rdev_size = | |
80ca3a44 | 3025 | __ATTR(size, S_IRUGO|S_IWUSR, rdev_size_show, rdev_size_store); |
83303b61 | 3026 | |
3cb03002 | 3027 | static ssize_t recovery_start_show(struct md_rdev *rdev, char *page) |
06e3c817 DW |
3028 | { |
3029 | unsigned long long recovery_start = rdev->recovery_offset; | |
3030 | ||
3031 | if (test_bit(In_sync, &rdev->flags) || | |
3032 | recovery_start == MaxSector) | |
3033 | return sprintf(page, "none\n"); | |
3034 | ||
3035 | return sprintf(page, "%llu\n", recovery_start); | |
3036 | } | |
3037 | ||
3cb03002 | 3038 | static ssize_t recovery_start_store(struct md_rdev *rdev, const char *buf, size_t len) |
06e3c817 DW |
3039 | { |
3040 | unsigned long long recovery_start; | |
3041 | ||
3042 | if (cmd_match(buf, "none")) | |
3043 | recovery_start = MaxSector; | |
b29bebd6 | 3044 | else if (kstrtoull(buf, 10, &recovery_start)) |
06e3c817 DW |
3045 | return -EINVAL; |
3046 | ||
3047 | if (rdev->mddev->pers && | |
3048 | rdev->raid_disk >= 0) | |
3049 | return -EBUSY; | |
3050 | ||
3051 | rdev->recovery_offset = recovery_start; | |
3052 | if (recovery_start == MaxSector) | |
3053 | set_bit(In_sync, &rdev->flags); | |
3054 | else | |
3055 | clear_bit(In_sync, &rdev->flags); | |
3056 | return len; | |
3057 | } | |
3058 | ||
3059 | static struct rdev_sysfs_entry rdev_recovery_start = | |
3060 | __ATTR(recovery_start, S_IRUGO|S_IWUSR, recovery_start_show, recovery_start_store); | |
3061 | ||
fc974ee2 VV |
3062 | /* sysfs access to bad-blocks list. |
3063 | * We present two files. | |
3064 | * 'bad-blocks' lists sector numbers and lengths of ranges that | |
3065 | * are recorded as bad. The list is truncated to fit within | |
3066 | * the one-page limit of sysfs. | |
3067 | * Writing "sector length" to this file adds an acknowledged | |
3068 | * bad block list. | |
3069 | * 'unacknowledged-bad-blocks' lists bad blocks that have not yet | |
3070 | * been acknowledged. Writing to this file adds bad blocks | |
3071 | * without acknowledging them. This is largely for testing. | |
3072 | */ | |
3cb03002 | 3073 | static ssize_t bb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3074 | { |
3075 | return badblocks_show(&rdev->badblocks, page, 0); | |
3076 | } | |
3cb03002 | 3077 | static ssize_t bb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 | 3078 | { |
de393cde N |
3079 | int rv = badblocks_store(&rdev->badblocks, page, len, 0); |
3080 | /* Maybe that ack was all we needed */ | |
3081 | if (test_and_clear_bit(BlockedBadBlocks, &rdev->flags)) | |
3082 | wake_up(&rdev->blocked_wait); | |
3083 | return rv; | |
16c791a5 N |
3084 | } |
3085 | static struct rdev_sysfs_entry rdev_bad_blocks = | |
3086 | __ATTR(bad_blocks, S_IRUGO|S_IWUSR, bb_show, bb_store); | |
3087 | ||
3cb03002 | 3088 | static ssize_t ubb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3089 | { |
3090 | return badblocks_show(&rdev->badblocks, page, 1); | |
3091 | } | |
3cb03002 | 3092 | static ssize_t ubb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 N |
3093 | { |
3094 | return badblocks_store(&rdev->badblocks, page, len, 1); | |
3095 | } | |
3096 | static struct rdev_sysfs_entry rdev_unack_bad_blocks = | |
3097 | __ATTR(unacknowledged_bad_blocks, S_IRUGO|S_IWUSR, ubb_show, ubb_store); | |
3098 | ||
86e6ffdd N |
3099 | static struct attribute *rdev_default_attrs[] = { |
3100 | &rdev_state.attr, | |
4dbcdc75 | 3101 | &rdev_errors.attr, |
014236d2 | 3102 | &rdev_slot.attr, |
93c8cad0 | 3103 | &rdev_offset.attr, |
c6563a8c | 3104 | &rdev_new_offset.attr, |
83303b61 | 3105 | &rdev_size.attr, |
06e3c817 | 3106 | &rdev_recovery_start.attr, |
16c791a5 N |
3107 | &rdev_bad_blocks.attr, |
3108 | &rdev_unack_bad_blocks.attr, | |
86e6ffdd N |
3109 | NULL, |
3110 | }; | |
3111 | static ssize_t | |
3112 | rdev_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
3113 | { | |
3114 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3115 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
86e6ffdd N |
3116 | |
3117 | if (!entry->show) | |
3118 | return -EIO; | |
758bfc8a N |
3119 | if (!rdev->mddev) |
3120 | return -EBUSY; | |
3121 | return entry->show(rdev, page); | |
86e6ffdd N |
3122 | } |
3123 | ||
3124 | static ssize_t | |
3125 | rdev_attr_store(struct kobject *kobj, struct attribute *attr, | |
3126 | const char *page, size_t length) | |
3127 | { | |
3128 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3129 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
27c529bb | 3130 | ssize_t rv; |
fd01b88c | 3131 | struct mddev *mddev = rdev->mddev; |
86e6ffdd N |
3132 | |
3133 | if (!entry->store) | |
3134 | return -EIO; | |
67463acb N |
3135 | if (!capable(CAP_SYS_ADMIN)) |
3136 | return -EACCES; | |
27c529bb | 3137 | rv = mddev ? mddev_lock(mddev): -EBUSY; |
ca388059 | 3138 | if (!rv) { |
27c529bb N |
3139 | if (rdev->mddev == NULL) |
3140 | rv = -EBUSY; | |
3141 | else | |
3142 | rv = entry->store(rdev, page, length); | |
6a51830e | 3143 | mddev_unlock(mddev); |
ca388059 N |
3144 | } |
3145 | return rv; | |
86e6ffdd N |
3146 | } |
3147 | ||
3148 | static void rdev_free(struct kobject *ko) | |
3149 | { | |
3cb03002 | 3150 | struct md_rdev *rdev = container_of(ko, struct md_rdev, kobj); |
86e6ffdd N |
3151 | kfree(rdev); |
3152 | } | |
52cf25d0 | 3153 | static const struct sysfs_ops rdev_sysfs_ops = { |
86e6ffdd N |
3154 | .show = rdev_attr_show, |
3155 | .store = rdev_attr_store, | |
3156 | }; | |
3157 | static struct kobj_type rdev_ktype = { | |
3158 | .release = rdev_free, | |
3159 | .sysfs_ops = &rdev_sysfs_ops, | |
3160 | .default_attrs = rdev_default_attrs, | |
3161 | }; | |
3162 | ||
3cb03002 | 3163 | int md_rdev_init(struct md_rdev *rdev) |
e8bb9a83 N |
3164 | { |
3165 | rdev->desc_nr = -1; | |
3166 | rdev->saved_raid_disk = -1; | |
3167 | rdev->raid_disk = -1; | |
3168 | rdev->flags = 0; | |
3169 | rdev->data_offset = 0; | |
c6563a8c | 3170 | rdev->new_data_offset = 0; |
e8bb9a83 N |
3171 | rdev->sb_events = 0; |
3172 | rdev->last_read_error.tv_sec = 0; | |
3173 | rdev->last_read_error.tv_nsec = 0; | |
2699b672 N |
3174 | rdev->sb_loaded = 0; |
3175 | rdev->bb_page = NULL; | |
e8bb9a83 N |
3176 | atomic_set(&rdev->nr_pending, 0); |
3177 | atomic_set(&rdev->read_errors, 0); | |
3178 | atomic_set(&rdev->corrected_errors, 0); | |
3179 | ||
3180 | INIT_LIST_HEAD(&rdev->same_set); | |
3181 | init_waitqueue_head(&rdev->blocked_wait); | |
2230dfe4 N |
3182 | |
3183 | /* Add space to store bad block list. | |
3184 | * This reserves the space even on arrays where it cannot | |
3185 | * be used - I wonder if that matters | |
3186 | */ | |
fc974ee2 | 3187 | return badblocks_init(&rdev->badblocks, 0); |
e8bb9a83 N |
3188 | } |
3189 | EXPORT_SYMBOL_GPL(md_rdev_init); | |
1da177e4 LT |
3190 | /* |
3191 | * Import a device. If 'super_format' >= 0, then sanity check the superblock | |
3192 | * | |
3193 | * mark the device faulty if: | |
3194 | * | |
3195 | * - the device is nonexistent (zero size) | |
3196 | * - the device has no valid superblock | |
3197 | * | |
3198 | * a faulty rdev _never_ has rdev->sb set. | |
3199 | */ | |
3cb03002 | 3200 | static struct md_rdev *md_import_device(dev_t newdev, int super_format, int super_minor) |
1da177e4 LT |
3201 | { |
3202 | char b[BDEVNAME_SIZE]; | |
3203 | int err; | |
3cb03002 | 3204 | struct md_rdev *rdev; |
1da177e4 LT |
3205 | sector_t size; |
3206 | ||
9ffae0cf | 3207 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
1da177e4 LT |
3208 | if (!rdev) { |
3209 | printk(KERN_ERR "md: could not alloc mem for new device!\n"); | |
3210 | return ERR_PTR(-ENOMEM); | |
3211 | } | |
1da177e4 | 3212 | |
2230dfe4 N |
3213 | err = md_rdev_init(rdev); |
3214 | if (err) | |
3215 | goto abort_free; | |
3216 | err = alloc_disk_sb(rdev); | |
3217 | if (err) | |
1da177e4 LT |
3218 | goto abort_free; |
3219 | ||
c5d79adb | 3220 | err = lock_rdev(rdev, newdev, super_format == -2); |
1da177e4 LT |
3221 | if (err) |
3222 | goto abort_free; | |
3223 | ||
f9cb074b | 3224 | kobject_init(&rdev->kobj, &rdev_ktype); |
86e6ffdd | 3225 | |
77304d2a | 3226 | size = i_size_read(rdev->bdev->bd_inode) >> BLOCK_SIZE_BITS; |
1da177e4 | 3227 | if (!size) { |
f72ffdd6 | 3228 | printk(KERN_WARNING |
1da177e4 LT |
3229 | "md: %s has zero or unknown size, marking faulty!\n", |
3230 | bdevname(rdev->bdev,b)); | |
3231 | err = -EINVAL; | |
3232 | goto abort_free; | |
3233 | } | |
3234 | ||
3235 | if (super_format >= 0) { | |
3236 | err = super_types[super_format]. | |
3237 | load_super(rdev, NULL, super_minor); | |
3238 | if (err == -EINVAL) { | |
df968c4e N |
3239 | printk(KERN_WARNING |
3240 | "md: %s does not have a valid v%d.%d " | |
3241 | "superblock, not importing!\n", | |
3242 | bdevname(rdev->bdev,b), | |
3243 | super_format, super_minor); | |
1da177e4 LT |
3244 | goto abort_free; |
3245 | } | |
3246 | if (err < 0) { | |
f72ffdd6 | 3247 | printk(KERN_WARNING |
1da177e4 LT |
3248 | "md: could not read %s's sb, not importing!\n", |
3249 | bdevname(rdev->bdev,b)); | |
3250 | goto abort_free; | |
3251 | } | |
3252 | } | |
6bfe0b49 | 3253 | |
1da177e4 LT |
3254 | return rdev; |
3255 | ||
3256 | abort_free: | |
2699b672 N |
3257 | if (rdev->bdev) |
3258 | unlock_rdev(rdev); | |
545c8795 | 3259 | md_rdev_clear(rdev); |
1da177e4 LT |
3260 | kfree(rdev); |
3261 | return ERR_PTR(err); | |
3262 | } | |
3263 | ||
3264 | /* | |
3265 | * Check a full RAID array for plausibility | |
3266 | */ | |
3267 | ||
f72ffdd6 | 3268 | static void analyze_sbs(struct mddev *mddev) |
1da177e4 LT |
3269 | { |
3270 | int i; | |
3cb03002 | 3271 | struct md_rdev *rdev, *freshest, *tmp; |
1da177e4 LT |
3272 | char b[BDEVNAME_SIZE]; |
3273 | ||
3274 | freshest = NULL; | |
dafb20fa | 3275 | rdev_for_each_safe(rdev, tmp, mddev) |
1da177e4 LT |
3276 | switch (super_types[mddev->major_version]. |
3277 | load_super(rdev, freshest, mddev->minor_version)) { | |
3278 | case 1: | |
3279 | freshest = rdev; | |
3280 | break; | |
3281 | case 0: | |
3282 | break; | |
3283 | default: | |
3284 | printk( KERN_ERR \ | |
3285 | "md: fatal superblock inconsistency in %s" | |
f72ffdd6 | 3286 | " -- removing from array\n", |
1da177e4 | 3287 | bdevname(rdev->bdev,b)); |
fb56dfef | 3288 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3289 | } |
3290 | ||
1da177e4 LT |
3291 | super_types[mddev->major_version]. |
3292 | validate_super(mddev, freshest); | |
3293 | ||
3294 | i = 0; | |
dafb20fa | 3295 | rdev_for_each_safe(rdev, tmp, mddev) { |
233fca36 N |
3296 | if (mddev->max_disks && |
3297 | (rdev->desc_nr >= mddev->max_disks || | |
3298 | i > mddev->max_disks)) { | |
de01dfad N |
3299 | printk(KERN_WARNING |
3300 | "md: %s: %s: only %d devices permitted\n", | |
3301 | mdname(mddev), bdevname(rdev->bdev, b), | |
3302 | mddev->max_disks); | |
fb56dfef | 3303 | md_kick_rdev_from_array(rdev); |
de01dfad N |
3304 | continue; |
3305 | } | |
1aee41f6 | 3306 | if (rdev != freshest) { |
1da177e4 LT |
3307 | if (super_types[mddev->major_version]. |
3308 | validate_super(mddev, rdev)) { | |
3309 | printk(KERN_WARNING "md: kicking non-fresh %s" | |
3310 | " from array!\n", | |
3311 | bdevname(rdev->bdev,b)); | |
fb56dfef | 3312 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3313 | continue; |
3314 | } | |
1aee41f6 | 3315 | } |
1da177e4 LT |
3316 | if (mddev->level == LEVEL_MULTIPATH) { |
3317 | rdev->desc_nr = i++; | |
3318 | rdev->raid_disk = rdev->desc_nr; | |
b2d444d7 | 3319 | set_bit(In_sync, &rdev->flags); |
f2076e7d SL |
3320 | } else if (rdev->raid_disk >= |
3321 | (mddev->raid_disks - min(0, mddev->delta_disks)) && | |
3322 | !test_bit(Journal, &rdev->flags)) { | |
a778b73f N |
3323 | rdev->raid_disk = -1; |
3324 | clear_bit(In_sync, &rdev->flags); | |
1da177e4 LT |
3325 | } |
3326 | } | |
1da177e4 LT |
3327 | } |
3328 | ||
72e02075 N |
3329 | /* Read a fixed-point number. |
3330 | * Numbers in sysfs attributes should be in "standard" units where | |
3331 | * possible, so time should be in seconds. | |
f72ffdd6 | 3332 | * However we internally use a a much smaller unit such as |
72e02075 N |
3333 | * milliseconds or jiffies. |
3334 | * This function takes a decimal number with a possible fractional | |
3335 | * component, and produces an integer which is the result of | |
3336 | * multiplying that number by 10^'scale'. | |
3337 | * all without any floating-point arithmetic. | |
3338 | */ | |
3339 | int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale) | |
3340 | { | |
3341 | unsigned long result = 0; | |
3342 | long decimals = -1; | |
3343 | while (isdigit(*cp) || (*cp == '.' && decimals < 0)) { | |
3344 | if (*cp == '.') | |
3345 | decimals = 0; | |
3346 | else if (decimals < scale) { | |
3347 | unsigned int value; | |
3348 | value = *cp - '0'; | |
3349 | result = result * 10 + value; | |
3350 | if (decimals >= 0) | |
3351 | decimals++; | |
3352 | } | |
3353 | cp++; | |
3354 | } | |
3355 | if (*cp == '\n') | |
3356 | cp++; | |
3357 | if (*cp) | |
3358 | return -EINVAL; | |
3359 | if (decimals < 0) | |
3360 | decimals = 0; | |
3361 | while (decimals < scale) { | |
3362 | result *= 10; | |
3363 | decimals ++; | |
3364 | } | |
3365 | *res = result; | |
3366 | return 0; | |
3367 | } | |
3368 | ||
16f17b39 | 3369 | static ssize_t |
fd01b88c | 3370 | safe_delay_show(struct mddev *mddev, char *page) |
16f17b39 N |
3371 | { |
3372 | int msec = (mddev->safemode_delay*1000)/HZ; | |
3373 | return sprintf(page, "%d.%03d\n", msec/1000, msec%1000); | |
3374 | } | |
3375 | static ssize_t | |
fd01b88c | 3376 | safe_delay_store(struct mddev *mddev, const char *cbuf, size_t len) |
16f17b39 | 3377 | { |
16f17b39 | 3378 | unsigned long msec; |
97ce0a7f | 3379 | |
28c1b9fd GR |
3380 | if (mddev_is_clustered(mddev)) { |
3381 | pr_info("md: Safemode is disabled for clustered mode\n"); | |
3382 | return -EINVAL; | |
3383 | } | |
3384 | ||
72e02075 | 3385 | if (strict_strtoul_scaled(cbuf, &msec, 3) < 0) |
16f17b39 | 3386 | return -EINVAL; |
16f17b39 N |
3387 | if (msec == 0) |
3388 | mddev->safemode_delay = 0; | |
3389 | else { | |
19052c0e | 3390 | unsigned long old_delay = mddev->safemode_delay; |
1b30e66f N |
3391 | unsigned long new_delay = (msec*HZ)/1000; |
3392 | ||
3393 | if (new_delay == 0) | |
3394 | new_delay = 1; | |
3395 | mddev->safemode_delay = new_delay; | |
3396 | if (new_delay < old_delay || old_delay == 0) | |
3397 | mod_timer(&mddev->safemode_timer, jiffies+1); | |
16f17b39 N |
3398 | } |
3399 | return len; | |
3400 | } | |
3401 | static struct md_sysfs_entry md_safe_delay = | |
80ca3a44 | 3402 | __ATTR(safe_mode_delay, S_IRUGO|S_IWUSR,safe_delay_show, safe_delay_store); |
16f17b39 | 3403 | |
eae1701f | 3404 | static ssize_t |
fd01b88c | 3405 | level_show(struct mddev *mddev, char *page) |
eae1701f | 3406 | { |
36d091f4 N |
3407 | struct md_personality *p; |
3408 | int ret; | |
3409 | spin_lock(&mddev->lock); | |
3410 | p = mddev->pers; | |
d9d166c2 | 3411 | if (p) |
36d091f4 | 3412 | ret = sprintf(page, "%s\n", p->name); |
d9d166c2 | 3413 | else if (mddev->clevel[0]) |
36d091f4 | 3414 | ret = sprintf(page, "%s\n", mddev->clevel); |
d9d166c2 | 3415 | else if (mddev->level != LEVEL_NONE) |
36d091f4 | 3416 | ret = sprintf(page, "%d\n", mddev->level); |
d9d166c2 | 3417 | else |
36d091f4 N |
3418 | ret = 0; |
3419 | spin_unlock(&mddev->lock); | |
3420 | return ret; | |
eae1701f N |
3421 | } |
3422 | ||
d9d166c2 | 3423 | static ssize_t |
fd01b88c | 3424 | level_store(struct mddev *mddev, const char *buf, size_t len) |
d9d166c2 | 3425 | { |
f2859af6 | 3426 | char clevel[16]; |
6791875e N |
3427 | ssize_t rv; |
3428 | size_t slen = len; | |
db721d32 | 3429 | struct md_personality *pers, *oldpers; |
f2859af6 | 3430 | long level; |
db721d32 | 3431 | void *priv, *oldpriv; |
3cb03002 | 3432 | struct md_rdev *rdev; |
245f46c2 | 3433 | |
6791875e N |
3434 | if (slen == 0 || slen >= sizeof(clevel)) |
3435 | return -EINVAL; | |
3436 | ||
3437 | rv = mddev_lock(mddev); | |
3438 | if (rv) | |
3439 | return rv; | |
3440 | ||
245f46c2 | 3441 | if (mddev->pers == NULL) { |
6791875e N |
3442 | strncpy(mddev->clevel, buf, slen); |
3443 | if (mddev->clevel[slen-1] == '\n') | |
3444 | slen--; | |
3445 | mddev->clevel[slen] = 0; | |
245f46c2 | 3446 | mddev->level = LEVEL_NONE; |
6791875e N |
3447 | rv = len; |
3448 | goto out_unlock; | |
245f46c2 | 3449 | } |
6791875e | 3450 | rv = -EROFS; |
bd8839e0 | 3451 | if (mddev->ro) |
6791875e | 3452 | goto out_unlock; |
245f46c2 N |
3453 | |
3454 | /* request to change the personality. Need to ensure: | |
3455 | * - array is not engaged in resync/recovery/reshape | |
3456 | * - old personality can be suspended | |
3457 | * - new personality will access other array. | |
3458 | */ | |
3459 | ||
6791875e | 3460 | rv = -EBUSY; |
bb4f1e9d | 3461 | if (mddev->sync_thread || |
f851b60d | 3462 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
bb4f1e9d N |
3463 | mddev->reshape_position != MaxSector || |
3464 | mddev->sysfs_active) | |
6791875e | 3465 | goto out_unlock; |
245f46c2 | 3466 | |
6791875e | 3467 | rv = -EINVAL; |
245f46c2 N |
3468 | if (!mddev->pers->quiesce) { |
3469 | printk(KERN_WARNING "md: %s: %s does not support online personality change\n", | |
3470 | mdname(mddev), mddev->pers->name); | |
6791875e | 3471 | goto out_unlock; |
245f46c2 N |
3472 | } |
3473 | ||
3474 | /* Now find the new personality */ | |
6791875e N |
3475 | strncpy(clevel, buf, slen); |
3476 | if (clevel[slen-1] == '\n') | |
3477 | slen--; | |
3478 | clevel[slen] = 0; | |
b29bebd6 | 3479 | if (kstrtol(clevel, 10, &level)) |
f2859af6 | 3480 | level = LEVEL_NONE; |
245f46c2 | 3481 | |
f2859af6 DW |
3482 | if (request_module("md-%s", clevel) != 0) |
3483 | request_module("md-level-%s", clevel); | |
245f46c2 | 3484 | spin_lock(&pers_lock); |
f2859af6 | 3485 | pers = find_pers(level, clevel); |
245f46c2 N |
3486 | if (!pers || !try_module_get(pers->owner)) { |
3487 | spin_unlock(&pers_lock); | |
f2859af6 | 3488 | printk(KERN_WARNING "md: personality %s not loaded\n", clevel); |
6791875e N |
3489 | rv = -EINVAL; |
3490 | goto out_unlock; | |
245f46c2 N |
3491 | } |
3492 | spin_unlock(&pers_lock); | |
3493 | ||
3494 | if (pers == mddev->pers) { | |
3495 | /* Nothing to do! */ | |
3496 | module_put(pers->owner); | |
6791875e N |
3497 | rv = len; |
3498 | goto out_unlock; | |
245f46c2 N |
3499 | } |
3500 | if (!pers->takeover) { | |
3501 | module_put(pers->owner); | |
3502 | printk(KERN_WARNING "md: %s: %s does not support personality takeover\n", | |
f2859af6 | 3503 | mdname(mddev), clevel); |
6791875e N |
3504 | rv = -EINVAL; |
3505 | goto out_unlock; | |
245f46c2 N |
3506 | } |
3507 | ||
dafb20fa | 3508 | rdev_for_each(rdev, mddev) |
e93f68a1 N |
3509 | rdev->new_raid_disk = rdev->raid_disk; |
3510 | ||
245f46c2 N |
3511 | /* ->takeover must set new_* and/or delta_disks |
3512 | * if it succeeds, and may set them when it fails. | |
3513 | */ | |
3514 | priv = pers->takeover(mddev); | |
3515 | if (IS_ERR(priv)) { | |
3516 | mddev->new_level = mddev->level; | |
3517 | mddev->new_layout = mddev->layout; | |
664e7c41 | 3518 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
245f46c2 N |
3519 | mddev->raid_disks -= mddev->delta_disks; |
3520 | mddev->delta_disks = 0; | |
2c810cdd | 3521 | mddev->reshape_backwards = 0; |
245f46c2 N |
3522 | module_put(pers->owner); |
3523 | printk(KERN_WARNING "md: %s: %s would not accept array\n", | |
f2859af6 | 3524 | mdname(mddev), clevel); |
6791875e N |
3525 | rv = PTR_ERR(priv); |
3526 | goto out_unlock; | |
245f46c2 N |
3527 | } |
3528 | ||
3529 | /* Looks like we have a winner */ | |
3530 | mddev_suspend(mddev); | |
5aa61f42 | 3531 | mddev_detach(mddev); |
36d091f4 N |
3532 | |
3533 | spin_lock(&mddev->lock); | |
db721d32 N |
3534 | oldpers = mddev->pers; |
3535 | oldpriv = mddev->private; | |
3536 | mddev->pers = pers; | |
3537 | mddev->private = priv; | |
3538 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); | |
3539 | mddev->level = mddev->new_level; | |
3540 | mddev->layout = mddev->new_layout; | |
3541 | mddev->chunk_sectors = mddev->new_chunk_sectors; | |
3542 | mddev->delta_disks = 0; | |
3543 | mddev->reshape_backwards = 0; | |
3544 | mddev->degraded = 0; | |
36d091f4 | 3545 | spin_unlock(&mddev->lock); |
db721d32 N |
3546 | |
3547 | if (oldpers->sync_request == NULL && | |
3548 | mddev->external) { | |
3549 | /* We are converting from a no-redundancy array | |
3550 | * to a redundancy array and metadata is managed | |
3551 | * externally so we need to be sure that writes | |
3552 | * won't block due to a need to transition | |
3553 | * clean->dirty | |
3554 | * until external management is started. | |
3555 | */ | |
3556 | mddev->in_sync = 0; | |
3557 | mddev->safemode_delay = 0; | |
3558 | mddev->safemode = 0; | |
3559 | } | |
f72ffdd6 | 3560 | |
db721d32 N |
3561 | oldpers->free(mddev, oldpriv); |
3562 | ||
3563 | if (oldpers->sync_request == NULL && | |
a64c876f N |
3564 | pers->sync_request != NULL) { |
3565 | /* need to add the md_redundancy_group */ | |
3566 | if (sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
3567 | printk(KERN_WARNING | |
3568 | "md: cannot register extra attributes for %s\n", | |
3569 | mdname(mddev)); | |
388975cc | 3570 | mddev->sysfs_action = sysfs_get_dirent(mddev->kobj.sd, "sync_action"); |
f72ffdd6 | 3571 | } |
db721d32 | 3572 | if (oldpers->sync_request != NULL && |
a64c876f N |
3573 | pers->sync_request == NULL) { |
3574 | /* need to remove the md_redundancy_group */ | |
3575 | if (mddev->to_remove == NULL) | |
3576 | mddev->to_remove = &md_redundancy_group; | |
3577 | } | |
3578 | ||
dafb20fa | 3579 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
3580 | if (rdev->raid_disk < 0) |
3581 | continue; | |
bf2cb0da | 3582 | if (rdev->new_raid_disk >= mddev->raid_disks) |
e93f68a1 N |
3583 | rdev->new_raid_disk = -1; |
3584 | if (rdev->new_raid_disk == rdev->raid_disk) | |
3585 | continue; | |
36fad858 | 3586 | sysfs_unlink_rdev(mddev, rdev); |
e93f68a1 | 3587 | } |
dafb20fa | 3588 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
3589 | if (rdev->raid_disk < 0) |
3590 | continue; | |
3591 | if (rdev->new_raid_disk == rdev->raid_disk) | |
3592 | continue; | |
3593 | rdev->raid_disk = rdev->new_raid_disk; | |
3594 | if (rdev->raid_disk < 0) | |
3a981b03 | 3595 | clear_bit(In_sync, &rdev->flags); |
e93f68a1 | 3596 | else { |
36fad858 NK |
3597 | if (sysfs_link_rdev(mddev, rdev)) |
3598 | printk(KERN_WARNING "md: cannot register rd%d" | |
3599 | " for %s after level change\n", | |
3600 | rdev->raid_disk, mdname(mddev)); | |
3a981b03 | 3601 | } |
e93f68a1 N |
3602 | } |
3603 | ||
db721d32 | 3604 | if (pers->sync_request == NULL) { |
9af204cf TM |
3605 | /* this is now an array without redundancy, so |
3606 | * it must always be in_sync | |
3607 | */ | |
3608 | mddev->in_sync = 1; | |
3609 | del_timer_sync(&mddev->safemode_timer); | |
3610 | } | |
02e5f5c0 | 3611 | blk_set_stacking_limits(&mddev->queue->limits); |
245f46c2 | 3612 | pers->run(mddev); |
245f46c2 | 3613 | set_bit(MD_CHANGE_DEVS, &mddev->flags); |
47525e59 | 3614 | mddev_resume(mddev); |
830778a1 N |
3615 | if (!mddev->thread) |
3616 | md_update_sb(mddev, 1); | |
5cac7861 | 3617 | sysfs_notify(&mddev->kobj, NULL, "level"); |
bb7f8d22 | 3618 | md_new_event(mddev); |
6791875e N |
3619 | rv = len; |
3620 | out_unlock: | |
3621 | mddev_unlock(mddev); | |
d9d166c2 N |
3622 | return rv; |
3623 | } | |
3624 | ||
3625 | static struct md_sysfs_entry md_level = | |
80ca3a44 | 3626 | __ATTR(level, S_IRUGO|S_IWUSR, level_show, level_store); |
eae1701f | 3627 | |
d4dbd025 | 3628 | static ssize_t |
fd01b88c | 3629 | layout_show(struct mddev *mddev, char *page) |
d4dbd025 N |
3630 | { |
3631 | /* just a number, not meaningful for all levels */ | |
08a02ecd N |
3632 | if (mddev->reshape_position != MaxSector && |
3633 | mddev->layout != mddev->new_layout) | |
3634 | return sprintf(page, "%d (%d)\n", | |
3635 | mddev->new_layout, mddev->layout); | |
d4dbd025 N |
3636 | return sprintf(page, "%d\n", mddev->layout); |
3637 | } | |
3638 | ||
3639 | static ssize_t | |
fd01b88c | 3640 | layout_store(struct mddev *mddev, const char *buf, size_t len) |
d4dbd025 | 3641 | { |
4c9309c0 | 3642 | unsigned int n; |
6791875e | 3643 | int err; |
d4dbd025 | 3644 | |
4c9309c0 AD |
3645 | err = kstrtouint(buf, 10, &n); |
3646 | if (err < 0) | |
3647 | return err; | |
6791875e N |
3648 | err = mddev_lock(mddev); |
3649 | if (err) | |
3650 | return err; | |
d4dbd025 | 3651 | |
b3546035 | 3652 | if (mddev->pers) { |
50ac168a | 3653 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
3654 | err = -EBUSY; |
3655 | else if (mddev->ro) | |
3656 | err = -EROFS; | |
3657 | else { | |
3658 | mddev->new_layout = n; | |
3659 | err = mddev->pers->check_reshape(mddev); | |
3660 | if (err) | |
3661 | mddev->new_layout = mddev->layout; | |
597a711b | 3662 | } |
b3546035 | 3663 | } else { |
08a02ecd | 3664 | mddev->new_layout = n; |
b3546035 N |
3665 | if (mddev->reshape_position == MaxSector) |
3666 | mddev->layout = n; | |
3667 | } | |
6791875e N |
3668 | mddev_unlock(mddev); |
3669 | return err ?: len; | |
d4dbd025 N |
3670 | } |
3671 | static struct md_sysfs_entry md_layout = | |
80ca3a44 | 3672 | __ATTR(layout, S_IRUGO|S_IWUSR, layout_show, layout_store); |
d4dbd025 | 3673 | |
eae1701f | 3674 | static ssize_t |
fd01b88c | 3675 | raid_disks_show(struct mddev *mddev, char *page) |
eae1701f | 3676 | { |
bb636547 N |
3677 | if (mddev->raid_disks == 0) |
3678 | return 0; | |
08a02ecd N |
3679 | if (mddev->reshape_position != MaxSector && |
3680 | mddev->delta_disks != 0) | |
3681 | return sprintf(page, "%d (%d)\n", mddev->raid_disks, | |
3682 | mddev->raid_disks - mddev->delta_disks); | |
eae1701f N |
3683 | return sprintf(page, "%d\n", mddev->raid_disks); |
3684 | } | |
3685 | ||
fd01b88c | 3686 | static int update_raid_disks(struct mddev *mddev, int raid_disks); |
da943b99 N |
3687 | |
3688 | static ssize_t | |
fd01b88c | 3689 | raid_disks_store(struct mddev *mddev, const char *buf, size_t len) |
da943b99 | 3690 | { |
4c9309c0 | 3691 | unsigned int n; |
6791875e | 3692 | int err; |
da943b99 | 3693 | |
4c9309c0 AD |
3694 | err = kstrtouint(buf, 10, &n); |
3695 | if (err < 0) | |
3696 | return err; | |
da943b99 | 3697 | |
6791875e N |
3698 | err = mddev_lock(mddev); |
3699 | if (err) | |
3700 | return err; | |
da943b99 | 3701 | if (mddev->pers) |
6791875e | 3702 | err = update_raid_disks(mddev, n); |
08a02ecd | 3703 | else if (mddev->reshape_position != MaxSector) { |
c6563a8c | 3704 | struct md_rdev *rdev; |
08a02ecd | 3705 | int olddisks = mddev->raid_disks - mddev->delta_disks; |
c6563a8c | 3706 | |
6791875e | 3707 | err = -EINVAL; |
c6563a8c N |
3708 | rdev_for_each(rdev, mddev) { |
3709 | if (olddisks < n && | |
3710 | rdev->data_offset < rdev->new_data_offset) | |
6791875e | 3711 | goto out_unlock; |
c6563a8c N |
3712 | if (olddisks > n && |
3713 | rdev->data_offset > rdev->new_data_offset) | |
6791875e | 3714 | goto out_unlock; |
c6563a8c | 3715 | } |
6791875e | 3716 | err = 0; |
08a02ecd N |
3717 | mddev->delta_disks = n - olddisks; |
3718 | mddev->raid_disks = n; | |
2c810cdd | 3719 | mddev->reshape_backwards = (mddev->delta_disks < 0); |
08a02ecd | 3720 | } else |
da943b99 | 3721 | mddev->raid_disks = n; |
6791875e N |
3722 | out_unlock: |
3723 | mddev_unlock(mddev); | |
3724 | return err ? err : len; | |
da943b99 N |
3725 | } |
3726 | static struct md_sysfs_entry md_raid_disks = | |
80ca3a44 | 3727 | __ATTR(raid_disks, S_IRUGO|S_IWUSR, raid_disks_show, raid_disks_store); |
eae1701f | 3728 | |
3b34380a | 3729 | static ssize_t |
fd01b88c | 3730 | chunk_size_show(struct mddev *mddev, char *page) |
3b34380a | 3731 | { |
08a02ecd | 3732 | if (mddev->reshape_position != MaxSector && |
664e7c41 AN |
3733 | mddev->chunk_sectors != mddev->new_chunk_sectors) |
3734 | return sprintf(page, "%d (%d)\n", | |
3735 | mddev->new_chunk_sectors << 9, | |
9d8f0363 AN |
3736 | mddev->chunk_sectors << 9); |
3737 | return sprintf(page, "%d\n", mddev->chunk_sectors << 9); | |
3b34380a N |
3738 | } |
3739 | ||
3740 | static ssize_t | |
fd01b88c | 3741 | chunk_size_store(struct mddev *mddev, const char *buf, size_t len) |
3b34380a | 3742 | { |
4c9309c0 | 3743 | unsigned long n; |
6791875e | 3744 | int err; |
3b34380a | 3745 | |
4c9309c0 AD |
3746 | err = kstrtoul(buf, 10, &n); |
3747 | if (err < 0) | |
3748 | return err; | |
3b34380a | 3749 | |
6791875e N |
3750 | err = mddev_lock(mddev); |
3751 | if (err) | |
3752 | return err; | |
b3546035 | 3753 | if (mddev->pers) { |
50ac168a | 3754 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
3755 | err = -EBUSY; |
3756 | else if (mddev->ro) | |
3757 | err = -EROFS; | |
3758 | else { | |
3759 | mddev->new_chunk_sectors = n >> 9; | |
3760 | err = mddev->pers->check_reshape(mddev); | |
3761 | if (err) | |
3762 | mddev->new_chunk_sectors = mddev->chunk_sectors; | |
597a711b | 3763 | } |
b3546035 | 3764 | } else { |
664e7c41 | 3765 | mddev->new_chunk_sectors = n >> 9; |
b3546035 | 3766 | if (mddev->reshape_position == MaxSector) |
9d8f0363 | 3767 | mddev->chunk_sectors = n >> 9; |
b3546035 | 3768 | } |
6791875e N |
3769 | mddev_unlock(mddev); |
3770 | return err ?: len; | |
3b34380a N |
3771 | } |
3772 | static struct md_sysfs_entry md_chunk_size = | |
80ca3a44 | 3773 | __ATTR(chunk_size, S_IRUGO|S_IWUSR, chunk_size_show, chunk_size_store); |
3b34380a | 3774 | |
a94213b1 | 3775 | static ssize_t |
fd01b88c | 3776 | resync_start_show(struct mddev *mddev, char *page) |
a94213b1 | 3777 | { |
d1a7c503 N |
3778 | if (mddev->recovery_cp == MaxSector) |
3779 | return sprintf(page, "none\n"); | |
a94213b1 N |
3780 | return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp); |
3781 | } | |
3782 | ||
3783 | static ssize_t | |
fd01b88c | 3784 | resync_start_store(struct mddev *mddev, const char *buf, size_t len) |
a94213b1 | 3785 | { |
4c9309c0 | 3786 | unsigned long long n; |
6791875e | 3787 | int err; |
4c9309c0 AD |
3788 | |
3789 | if (cmd_match(buf, "none")) | |
3790 | n = MaxSector; | |
3791 | else { | |
3792 | err = kstrtoull(buf, 10, &n); | |
3793 | if (err < 0) | |
3794 | return err; | |
3795 | if (n != (sector_t)n) | |
3796 | return -EINVAL; | |
3797 | } | |
a94213b1 | 3798 | |
6791875e N |
3799 | err = mddev_lock(mddev); |
3800 | if (err) | |
3801 | return err; | |
b098636c | 3802 | if (mddev->pers && !test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) |
6791875e | 3803 | err = -EBUSY; |
a94213b1 | 3804 | |
6791875e N |
3805 | if (!err) { |
3806 | mddev->recovery_cp = n; | |
3807 | if (mddev->pers) | |
3808 | set_bit(MD_CHANGE_CLEAN, &mddev->flags); | |
3809 | } | |
3810 | mddev_unlock(mddev); | |
3811 | return err ?: len; | |
a94213b1 N |
3812 | } |
3813 | static struct md_sysfs_entry md_resync_start = | |
750f199e N |
3814 | __ATTR_PREALLOC(resync_start, S_IRUGO|S_IWUSR, |
3815 | resync_start_show, resync_start_store); | |
a94213b1 | 3816 | |
9e653b63 N |
3817 | /* |
3818 | * The array state can be: | |
3819 | * | |
3820 | * clear | |
3821 | * No devices, no size, no level | |
3822 | * Equivalent to STOP_ARRAY ioctl | |
3823 | * inactive | |
3824 | * May have some settings, but array is not active | |
3825 | * all IO results in error | |
3826 | * When written, doesn't tear down array, but just stops it | |
3827 | * suspended (not supported yet) | |
3828 | * All IO requests will block. The array can be reconfigured. | |
910d8cb3 | 3829 | * Writing this, if accepted, will block until array is quiescent |
9e653b63 N |
3830 | * readonly |
3831 | * no resync can happen. no superblocks get written. | |
3832 | * write requests fail | |
3833 | * read-auto | |
3834 | * like readonly, but behaves like 'clean' on a write request. | |
3835 | * | |
3836 | * clean - no pending writes, but otherwise active. | |
3837 | * When written to inactive array, starts without resync | |
3838 | * If a write request arrives then | |
3839 | * if metadata is known, mark 'dirty' and switch to 'active'. | |
3840 | * if not known, block and switch to write-pending | |
3841 | * If written to an active array that has pending writes, then fails. | |
3842 | * active | |
3843 | * fully active: IO and resync can be happening. | |
3844 | * When written to inactive array, starts with resync | |
3845 | * | |
3846 | * write-pending | |
3847 | * clean, but writes are blocked waiting for 'active' to be written. | |
3848 | * | |
3849 | * active-idle | |
3850 | * like active, but no writes have been seen for a while (100msec). | |
3851 | * | |
3852 | */ | |
3853 | enum array_state { clear, inactive, suspended, readonly, read_auto, clean, active, | |
3854 | write_pending, active_idle, bad_word}; | |
05381954 | 3855 | static char *array_states[] = { |
9e653b63 N |
3856 | "clear", "inactive", "suspended", "readonly", "read-auto", "clean", "active", |
3857 | "write-pending", "active-idle", NULL }; | |
3858 | ||
3859 | static int match_word(const char *word, char **list) | |
3860 | { | |
3861 | int n; | |
3862 | for (n=0; list[n]; n++) | |
3863 | if (cmd_match(word, list[n])) | |
3864 | break; | |
3865 | return n; | |
3866 | } | |
3867 | ||
3868 | static ssize_t | |
fd01b88c | 3869 | array_state_show(struct mddev *mddev, char *page) |
9e653b63 N |
3870 | { |
3871 | enum array_state st = inactive; | |
3872 | ||
3873 | if (mddev->pers) | |
3874 | switch(mddev->ro) { | |
3875 | case 1: | |
3876 | st = readonly; | |
3877 | break; | |
3878 | case 2: | |
3879 | st = read_auto; | |
3880 | break; | |
3881 | case 0: | |
3882 | if (mddev->in_sync) | |
3883 | st = clean; | |
070dc6dd | 3884 | else if (test_bit(MD_CHANGE_PENDING, &mddev->flags)) |
e691063a | 3885 | st = write_pending; |
9e653b63 N |
3886 | else if (mddev->safemode) |
3887 | st = active_idle; | |
3888 | else | |
3889 | st = active; | |
3890 | } | |
3891 | else { | |
3892 | if (list_empty(&mddev->disks) && | |
3893 | mddev->raid_disks == 0 && | |
58c0fed4 | 3894 | mddev->dev_sectors == 0) |
9e653b63 N |
3895 | st = clear; |
3896 | else | |
3897 | st = inactive; | |
3898 | } | |
3899 | return sprintf(page, "%s\n", array_states[st]); | |
3900 | } | |
3901 | ||
f72ffdd6 N |
3902 | static int do_md_stop(struct mddev *mddev, int ro, struct block_device *bdev); |
3903 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev); | |
3904 | static int do_md_run(struct mddev *mddev); | |
fd01b88c | 3905 | static int restart_array(struct mddev *mddev); |
9e653b63 N |
3906 | |
3907 | static ssize_t | |
fd01b88c | 3908 | array_state_store(struct mddev *mddev, const char *buf, size_t len) |
9e653b63 | 3909 | { |
6791875e | 3910 | int err; |
9e653b63 | 3911 | enum array_state st = match_word(buf, array_states); |
6791875e N |
3912 | |
3913 | if (mddev->pers && (st == active || st == clean) && mddev->ro != 1) { | |
3914 | /* don't take reconfig_mutex when toggling between | |
3915 | * clean and active | |
3916 | */ | |
3917 | spin_lock(&mddev->lock); | |
3918 | if (st == active) { | |
3919 | restart_array(mddev); | |
3920 | clear_bit(MD_CHANGE_PENDING, &mddev->flags); | |
3921 | wake_up(&mddev->sb_wait); | |
3922 | err = 0; | |
3923 | } else /* st == clean */ { | |
3924 | restart_array(mddev); | |
3925 | if (atomic_read(&mddev->writes_pending) == 0) { | |
3926 | if (mddev->in_sync == 0) { | |
3927 | mddev->in_sync = 1; | |
3928 | if (mddev->safemode == 1) | |
3929 | mddev->safemode = 0; | |
3930 | set_bit(MD_CHANGE_CLEAN, &mddev->flags); | |
3931 | } | |
3932 | err = 0; | |
3933 | } else | |
3934 | err = -EBUSY; | |
3935 | } | |
3936 | spin_unlock(&mddev->lock); | |
c008f1d3 | 3937 | return err ?: len; |
6791875e N |
3938 | } |
3939 | err = mddev_lock(mddev); | |
3940 | if (err) | |
3941 | return err; | |
3942 | err = -EINVAL; | |
9e653b63 N |
3943 | switch(st) { |
3944 | case bad_word: | |
3945 | break; | |
3946 | case clear: | |
3947 | /* stopping an active array */ | |
a05b7ea0 | 3948 | err = do_md_stop(mddev, 0, NULL); |
9e653b63 N |
3949 | break; |
3950 | case inactive: | |
3951 | /* stopping an active array */ | |
90cf195d | 3952 | if (mddev->pers) |
a05b7ea0 | 3953 | err = do_md_stop(mddev, 2, NULL); |
90cf195d | 3954 | else |
e691063a | 3955 | err = 0; /* already inactive */ |
9e653b63 N |
3956 | break; |
3957 | case suspended: | |
3958 | break; /* not supported yet */ | |
3959 | case readonly: | |
3960 | if (mddev->pers) | |
a05b7ea0 | 3961 | err = md_set_readonly(mddev, NULL); |
9e653b63 N |
3962 | else { |
3963 | mddev->ro = 1; | |
648b629e | 3964 | set_disk_ro(mddev->gendisk, 1); |
9e653b63 N |
3965 | err = do_md_run(mddev); |
3966 | } | |
3967 | break; | |
3968 | case read_auto: | |
9e653b63 | 3969 | if (mddev->pers) { |
80268ee9 | 3970 | if (mddev->ro == 0) |
a05b7ea0 | 3971 | err = md_set_readonly(mddev, NULL); |
80268ee9 | 3972 | else if (mddev->ro == 1) |
648b629e N |
3973 | err = restart_array(mddev); |
3974 | if (err == 0) { | |
3975 | mddev->ro = 2; | |
3976 | set_disk_ro(mddev->gendisk, 0); | |
3977 | } | |
9e653b63 N |
3978 | } else { |
3979 | mddev->ro = 2; | |
3980 | err = do_md_run(mddev); | |
3981 | } | |
3982 | break; | |
3983 | case clean: | |
3984 | if (mddev->pers) { | |
339421de SL |
3985 | err = restart_array(mddev); |
3986 | if (err) | |
3987 | break; | |
85572d7c | 3988 | spin_lock(&mddev->lock); |
9e653b63 | 3989 | if (atomic_read(&mddev->writes_pending) == 0) { |
e691063a N |
3990 | if (mddev->in_sync == 0) { |
3991 | mddev->in_sync = 1; | |
31a59e34 N |
3992 | if (mddev->safemode == 1) |
3993 | mddev->safemode = 0; | |
070dc6dd | 3994 | set_bit(MD_CHANGE_CLEAN, &mddev->flags); |
e691063a N |
3995 | } |
3996 | err = 0; | |
3997 | } else | |
3998 | err = -EBUSY; | |
85572d7c | 3999 | spin_unlock(&mddev->lock); |
5bf29597 N |
4000 | } else |
4001 | err = -EINVAL; | |
9e653b63 N |
4002 | break; |
4003 | case active: | |
4004 | if (mddev->pers) { | |
339421de SL |
4005 | err = restart_array(mddev); |
4006 | if (err) | |
4007 | break; | |
070dc6dd | 4008 | clear_bit(MD_CHANGE_PENDING, &mddev->flags); |
9e653b63 N |
4009 | wake_up(&mddev->sb_wait); |
4010 | err = 0; | |
4011 | } else { | |
4012 | mddev->ro = 0; | |
648b629e | 4013 | set_disk_ro(mddev->gendisk, 0); |
9e653b63 N |
4014 | err = do_md_run(mddev); |
4015 | } | |
4016 | break; | |
4017 | case write_pending: | |
4018 | case active_idle: | |
4019 | /* these cannot be set */ | |
4020 | break; | |
4021 | } | |
6791875e N |
4022 | |
4023 | if (!err) { | |
1d23f178 N |
4024 | if (mddev->hold_active == UNTIL_IOCTL) |
4025 | mddev->hold_active = 0; | |
00bcb4ac | 4026 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 4027 | } |
6791875e N |
4028 | mddev_unlock(mddev); |
4029 | return err ?: len; | |
9e653b63 | 4030 | } |
80ca3a44 | 4031 | static struct md_sysfs_entry md_array_state = |
750f199e | 4032 | __ATTR_PREALLOC(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store); |
9e653b63 | 4033 | |
1e50915f | 4034 | static ssize_t |
fd01b88c | 4035 | max_corrected_read_errors_show(struct mddev *mddev, char *page) { |
1e50915f RB |
4036 | return sprintf(page, "%d\n", |
4037 | atomic_read(&mddev->max_corr_read_errors)); | |
4038 | } | |
4039 | ||
4040 | static ssize_t | |
fd01b88c | 4041 | max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len) |
1e50915f | 4042 | { |
4c9309c0 AD |
4043 | unsigned int n; |
4044 | int rv; | |
1e50915f | 4045 | |
4c9309c0 AD |
4046 | rv = kstrtouint(buf, 10, &n); |
4047 | if (rv < 0) | |
4048 | return rv; | |
4049 | atomic_set(&mddev->max_corr_read_errors, n); | |
4050 | return len; | |
1e50915f RB |
4051 | } |
4052 | ||
4053 | static struct md_sysfs_entry max_corr_read_errors = | |
4054 | __ATTR(max_read_errors, S_IRUGO|S_IWUSR, max_corrected_read_errors_show, | |
4055 | max_corrected_read_errors_store); | |
4056 | ||
6d7ff738 | 4057 | static ssize_t |
fd01b88c | 4058 | null_show(struct mddev *mddev, char *page) |
6d7ff738 N |
4059 | { |
4060 | return -EINVAL; | |
4061 | } | |
4062 | ||
4063 | static ssize_t | |
fd01b88c | 4064 | new_dev_store(struct mddev *mddev, const char *buf, size_t len) |
6d7ff738 N |
4065 | { |
4066 | /* buf must be %d:%d\n? giving major and minor numbers */ | |
4067 | /* The new device is added to the array. | |
4068 | * If the array has a persistent superblock, we read the | |
4069 | * superblock to initialise info and check validity. | |
4070 | * Otherwise, only checking done is that in bind_rdev_to_array, | |
4071 | * which mainly checks size. | |
4072 | */ | |
4073 | char *e; | |
4074 | int major = simple_strtoul(buf, &e, 10); | |
4075 | int minor; | |
4076 | dev_t dev; | |
3cb03002 | 4077 | struct md_rdev *rdev; |
6d7ff738 N |
4078 | int err; |
4079 | ||
4080 | if (!*buf || *e != ':' || !e[1] || e[1] == '\n') | |
4081 | return -EINVAL; | |
4082 | minor = simple_strtoul(e+1, &e, 10); | |
4083 | if (*e && *e != '\n') | |
4084 | return -EINVAL; | |
4085 | dev = MKDEV(major, minor); | |
4086 | if (major != MAJOR(dev) || | |
4087 | minor != MINOR(dev)) | |
4088 | return -EOVERFLOW; | |
4089 | ||
6791875e N |
4090 | flush_workqueue(md_misc_wq); |
4091 | ||
4092 | err = mddev_lock(mddev); | |
4093 | if (err) | |
4094 | return err; | |
6d7ff738 N |
4095 | if (mddev->persistent) { |
4096 | rdev = md_import_device(dev, mddev->major_version, | |
4097 | mddev->minor_version); | |
4098 | if (!IS_ERR(rdev) && !list_empty(&mddev->disks)) { | |
3cb03002 N |
4099 | struct md_rdev *rdev0 |
4100 | = list_entry(mddev->disks.next, | |
4101 | struct md_rdev, same_set); | |
6d7ff738 N |
4102 | err = super_types[mddev->major_version] |
4103 | .load_super(rdev, rdev0, mddev->minor_version); | |
4104 | if (err < 0) | |
4105 | goto out; | |
4106 | } | |
c5d79adb N |
4107 | } else if (mddev->external) |
4108 | rdev = md_import_device(dev, -2, -1); | |
4109 | else | |
6d7ff738 N |
4110 | rdev = md_import_device(dev, -1, -1); |
4111 | ||
9a8c0fa8 N |
4112 | if (IS_ERR(rdev)) { |
4113 | mddev_unlock(mddev); | |
6d7ff738 | 4114 | return PTR_ERR(rdev); |
9a8c0fa8 | 4115 | } |
6d7ff738 N |
4116 | err = bind_rdev_to_array(rdev, mddev); |
4117 | out: | |
4118 | if (err) | |
4119 | export_rdev(rdev); | |
6791875e | 4120 | mddev_unlock(mddev); |
6d7ff738 N |
4121 | return err ? err : len; |
4122 | } | |
4123 | ||
4124 | static struct md_sysfs_entry md_new_device = | |
80ca3a44 | 4125 | __ATTR(new_dev, S_IWUSR, null_show, new_dev_store); |
3b34380a | 4126 | |
9b1d1dac | 4127 | static ssize_t |
fd01b88c | 4128 | bitmap_store(struct mddev *mddev, const char *buf, size_t len) |
9b1d1dac PC |
4129 | { |
4130 | char *end; | |
4131 | unsigned long chunk, end_chunk; | |
6791875e | 4132 | int err; |
9b1d1dac | 4133 | |
6791875e N |
4134 | err = mddev_lock(mddev); |
4135 | if (err) | |
4136 | return err; | |
9b1d1dac PC |
4137 | if (!mddev->bitmap) |
4138 | goto out; | |
4139 | /* buf should be <chunk> <chunk> ... or <chunk>-<chunk> ... (range) */ | |
4140 | while (*buf) { | |
4141 | chunk = end_chunk = simple_strtoul(buf, &end, 0); | |
4142 | if (buf == end) break; | |
4143 | if (*end == '-') { /* range */ | |
4144 | buf = end + 1; | |
4145 | end_chunk = simple_strtoul(buf, &end, 0); | |
4146 | if (buf == end) break; | |
4147 | } | |
4148 | if (*end && !isspace(*end)) break; | |
4149 | bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk); | |
e7d2860b | 4150 | buf = skip_spaces(end); |
9b1d1dac PC |
4151 | } |
4152 | bitmap_unplug(mddev->bitmap); /* flush the bits to disk */ | |
4153 | out: | |
6791875e | 4154 | mddev_unlock(mddev); |
9b1d1dac PC |
4155 | return len; |
4156 | } | |
4157 | ||
4158 | static struct md_sysfs_entry md_bitmap = | |
4159 | __ATTR(bitmap_set_bits, S_IWUSR, null_show, bitmap_store); | |
4160 | ||
a35b0d69 | 4161 | static ssize_t |
fd01b88c | 4162 | size_show(struct mddev *mddev, char *page) |
a35b0d69 | 4163 | { |
58c0fed4 AN |
4164 | return sprintf(page, "%llu\n", |
4165 | (unsigned long long)mddev->dev_sectors / 2); | |
a35b0d69 N |
4166 | } |
4167 | ||
fd01b88c | 4168 | static int update_size(struct mddev *mddev, sector_t num_sectors); |
a35b0d69 N |
4169 | |
4170 | static ssize_t | |
fd01b88c | 4171 | size_store(struct mddev *mddev, const char *buf, size_t len) |
a35b0d69 N |
4172 | { |
4173 | /* If array is inactive, we can reduce the component size, but | |
4174 | * not increase it (except from 0). | |
4175 | * If array is active, we can try an on-line resize | |
4176 | */ | |
b522adcd DW |
4177 | sector_t sectors; |
4178 | int err = strict_blocks_to_sectors(buf, §ors); | |
a35b0d69 | 4179 | |
58c0fed4 AN |
4180 | if (err < 0) |
4181 | return err; | |
6791875e N |
4182 | err = mddev_lock(mddev); |
4183 | if (err) | |
4184 | return err; | |
a35b0d69 | 4185 | if (mddev->pers) { |
58c0fed4 | 4186 | err = update_size(mddev, sectors); |
850b2b42 | 4187 | md_update_sb(mddev, 1); |
a35b0d69 | 4188 | } else { |
58c0fed4 AN |
4189 | if (mddev->dev_sectors == 0 || |
4190 | mddev->dev_sectors > sectors) | |
4191 | mddev->dev_sectors = sectors; | |
a35b0d69 N |
4192 | else |
4193 | err = -ENOSPC; | |
4194 | } | |
6791875e | 4195 | mddev_unlock(mddev); |
a35b0d69 N |
4196 | return err ? err : len; |
4197 | } | |
4198 | ||
4199 | static struct md_sysfs_entry md_size = | |
80ca3a44 | 4200 | __ATTR(component_size, S_IRUGO|S_IWUSR, size_show, size_store); |
a35b0d69 | 4201 | |
83f0d77a | 4202 | /* Metadata version. |
e691063a N |
4203 | * This is one of |
4204 | * 'none' for arrays with no metadata (good luck...) | |
4205 | * 'external' for arrays with externally managed metadata, | |
8bb93aac N |
4206 | * or N.M for internally known formats |
4207 | */ | |
4208 | static ssize_t | |
fd01b88c | 4209 | metadata_show(struct mddev *mddev, char *page) |
8bb93aac N |
4210 | { |
4211 | if (mddev->persistent) | |
4212 | return sprintf(page, "%d.%d\n", | |
4213 | mddev->major_version, mddev->minor_version); | |
e691063a N |
4214 | else if (mddev->external) |
4215 | return sprintf(page, "external:%s\n", mddev->metadata_type); | |
8bb93aac N |
4216 | else |
4217 | return sprintf(page, "none\n"); | |
4218 | } | |
4219 | ||
4220 | static ssize_t | |
fd01b88c | 4221 | metadata_store(struct mddev *mddev, const char *buf, size_t len) |
8bb93aac N |
4222 | { |
4223 | int major, minor; | |
4224 | char *e; | |
6791875e | 4225 | int err; |
ea43ddd8 N |
4226 | /* Changing the details of 'external' metadata is |
4227 | * always permitted. Otherwise there must be | |
4228 | * no devices attached to the array. | |
4229 | */ | |
6791875e N |
4230 | |
4231 | err = mddev_lock(mddev); | |
4232 | if (err) | |
4233 | return err; | |
4234 | err = -EBUSY; | |
ea43ddd8 N |
4235 | if (mddev->external && strncmp(buf, "external:", 9) == 0) |
4236 | ; | |
4237 | else if (!list_empty(&mddev->disks)) | |
6791875e | 4238 | goto out_unlock; |
8bb93aac | 4239 | |
6791875e | 4240 | err = 0; |
8bb93aac N |
4241 | if (cmd_match(buf, "none")) { |
4242 | mddev->persistent = 0; | |
e691063a N |
4243 | mddev->external = 0; |
4244 | mddev->major_version = 0; | |
4245 | mddev->minor_version = 90; | |
6791875e | 4246 | goto out_unlock; |
e691063a N |
4247 | } |
4248 | if (strncmp(buf, "external:", 9) == 0) { | |
20a49ff6 | 4249 | size_t namelen = len-9; |
e691063a N |
4250 | if (namelen >= sizeof(mddev->metadata_type)) |
4251 | namelen = sizeof(mddev->metadata_type)-1; | |
4252 | strncpy(mddev->metadata_type, buf+9, namelen); | |
4253 | mddev->metadata_type[namelen] = 0; | |
4254 | if (namelen && mddev->metadata_type[namelen-1] == '\n') | |
4255 | mddev->metadata_type[--namelen] = 0; | |
4256 | mddev->persistent = 0; | |
4257 | mddev->external = 1; | |
8bb93aac N |
4258 | mddev->major_version = 0; |
4259 | mddev->minor_version = 90; | |
6791875e | 4260 | goto out_unlock; |
8bb93aac N |
4261 | } |
4262 | major = simple_strtoul(buf, &e, 10); | |
6791875e | 4263 | err = -EINVAL; |
8bb93aac | 4264 | if (e==buf || *e != '.') |
6791875e | 4265 | goto out_unlock; |
8bb93aac N |
4266 | buf = e+1; |
4267 | minor = simple_strtoul(buf, &e, 10); | |
3f9d7b0d | 4268 | if (e==buf || (*e && *e != '\n') ) |
6791875e N |
4269 | goto out_unlock; |
4270 | err = -ENOENT; | |
50511da3 | 4271 | if (major >= ARRAY_SIZE(super_types) || super_types[major].name == NULL) |
6791875e | 4272 | goto out_unlock; |
8bb93aac N |
4273 | mddev->major_version = major; |
4274 | mddev->minor_version = minor; | |
4275 | mddev->persistent = 1; | |
e691063a | 4276 | mddev->external = 0; |
6791875e N |
4277 | err = 0; |
4278 | out_unlock: | |
4279 | mddev_unlock(mddev); | |
4280 | return err ?: len; | |
8bb93aac N |
4281 | } |
4282 | ||
4283 | static struct md_sysfs_entry md_metadata = | |
750f199e | 4284 | __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store); |
8bb93aac | 4285 | |
24dd469d | 4286 | static ssize_t |
fd01b88c | 4287 | action_show(struct mddev *mddev, char *page) |
24dd469d | 4288 | { |
7eec314d | 4289 | char *type = "idle"; |
b7b17c9b N |
4290 | unsigned long recovery = mddev->recovery; |
4291 | if (test_bit(MD_RECOVERY_FROZEN, &recovery)) | |
b6a9ce68 | 4292 | type = "frozen"; |
b7b17c9b N |
4293 | else if (test_bit(MD_RECOVERY_RUNNING, &recovery) || |
4294 | (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &recovery))) { | |
4295 | if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) | |
ccfcc3c1 | 4296 | type = "reshape"; |
b7b17c9b N |
4297 | else if (test_bit(MD_RECOVERY_SYNC, &recovery)) { |
4298 | if (!test_bit(MD_RECOVERY_REQUESTED, &recovery)) | |
24dd469d | 4299 | type = "resync"; |
b7b17c9b | 4300 | else if (test_bit(MD_RECOVERY_CHECK, &recovery)) |
24dd469d N |
4301 | type = "check"; |
4302 | else | |
4303 | type = "repair"; | |
b7b17c9b | 4304 | } else if (test_bit(MD_RECOVERY_RECOVER, &recovery)) |
24dd469d | 4305 | type = "recover"; |
985ca973 N |
4306 | else if (mddev->reshape_position != MaxSector) |
4307 | type = "reshape"; | |
24dd469d N |
4308 | } |
4309 | return sprintf(page, "%s\n", type); | |
4310 | } | |
4311 | ||
4312 | static ssize_t | |
fd01b88c | 4313 | action_store(struct mddev *mddev, const char *page, size_t len) |
24dd469d | 4314 | { |
7eec314d N |
4315 | if (!mddev->pers || !mddev->pers->sync_request) |
4316 | return -EINVAL; | |
4317 | ||
b6a9ce68 N |
4318 | |
4319 | if (cmd_match(page, "idle") || cmd_match(page, "frozen")) { | |
56ccc112 N |
4320 | if (cmd_match(page, "frozen")) |
4321 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4322 | else | |
4323 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
8e8e2518 N |
4324 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
4325 | mddev_lock(mddev) == 0) { | |
4326 | flush_workqueue(md_misc_wq); | |
4327 | if (mddev->sync_thread) { | |
4328 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
6791875e | 4329 | md_reap_sync_thread(mddev); |
6791875e | 4330 | } |
8e8e2518 | 4331 | mddev_unlock(mddev); |
7eec314d | 4332 | } |
312045ee | 4333 | } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
24dd469d | 4334 | return -EBUSY; |
72a23c21 | 4335 | else if (cmd_match(page, "resync")) |
56ccc112 | 4336 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4337 | else if (cmd_match(page, "recover")) { |
56ccc112 | 4338 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4339 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
72a23c21 | 4340 | } else if (cmd_match(page, "reshape")) { |
16484bf5 N |
4341 | int err; |
4342 | if (mddev->pers->start_reshape == NULL) | |
4343 | return -EINVAL; | |
6791875e N |
4344 | err = mddev_lock(mddev); |
4345 | if (!err) { | |
312045ee N |
4346 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4347 | err = -EBUSY; | |
4348 | else { | |
4349 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4350 | err = mddev->pers->start_reshape(mddev); | |
4351 | } | |
6791875e N |
4352 | mddev_unlock(mddev); |
4353 | } | |
16484bf5 N |
4354 | if (err) |
4355 | return err; | |
a99ac971 | 4356 | sysfs_notify(&mddev->kobj, NULL, "degraded"); |
16484bf5 | 4357 | } else { |
bce74dac | 4358 | if (cmd_match(page, "check")) |
7eec314d | 4359 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
2adc7d47 | 4360 | else if (!cmd_match(page, "repair")) |
7eec314d | 4361 | return -EINVAL; |
56ccc112 | 4362 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
7eec314d N |
4363 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
4364 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
7eec314d | 4365 | } |
48c26ddc N |
4366 | if (mddev->ro == 2) { |
4367 | /* A write to sync_action is enough to justify | |
4368 | * canceling read-auto mode | |
4369 | */ | |
4370 | mddev->ro = 0; | |
4371 | md_wakeup_thread(mddev->sync_thread); | |
4372 | } | |
03c902e1 | 4373 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
24dd469d | 4374 | md_wakeup_thread(mddev->thread); |
00bcb4ac | 4375 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
24dd469d N |
4376 | return len; |
4377 | } | |
4378 | ||
c4a39551 | 4379 | static struct md_sysfs_entry md_scan_mode = |
750f199e | 4380 | __ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store); |
c4a39551 JB |
4381 | |
4382 | static ssize_t | |
4383 | last_sync_action_show(struct mddev *mddev, char *page) | |
4384 | { | |
4385 | return sprintf(page, "%s\n", mddev->last_sync_action); | |
4386 | } | |
4387 | ||
4388 | static struct md_sysfs_entry md_last_scan_mode = __ATTR_RO(last_sync_action); | |
4389 | ||
9d88883e | 4390 | static ssize_t |
fd01b88c | 4391 | mismatch_cnt_show(struct mddev *mddev, char *page) |
9d88883e N |
4392 | { |
4393 | return sprintf(page, "%llu\n", | |
7f7583d4 JM |
4394 | (unsigned long long) |
4395 | atomic64_read(&mddev->resync_mismatches)); | |
9d88883e N |
4396 | } |
4397 | ||
80ca3a44 | 4398 | static struct md_sysfs_entry md_mismatches = __ATTR_RO(mismatch_cnt); |
9d88883e | 4399 | |
88202a0c | 4400 | static ssize_t |
fd01b88c | 4401 | sync_min_show(struct mddev *mddev, char *page) |
88202a0c N |
4402 | { |
4403 | return sprintf(page, "%d (%s)\n", speed_min(mddev), | |
4404 | mddev->sync_speed_min ? "local": "system"); | |
4405 | } | |
4406 | ||
4407 | static ssize_t | |
fd01b88c | 4408 | sync_min_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4409 | { |
4c9309c0 AD |
4410 | unsigned int min; |
4411 | int rv; | |
4412 | ||
88202a0c | 4413 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4414 | min = 0; |
4415 | } else { | |
4416 | rv = kstrtouint(buf, 10, &min); | |
4417 | if (rv < 0) | |
4418 | return rv; | |
4419 | if (min == 0) | |
4420 | return -EINVAL; | |
88202a0c | 4421 | } |
88202a0c N |
4422 | mddev->sync_speed_min = min; |
4423 | return len; | |
4424 | } | |
4425 | ||
4426 | static struct md_sysfs_entry md_sync_min = | |
4427 | __ATTR(sync_speed_min, S_IRUGO|S_IWUSR, sync_min_show, sync_min_store); | |
4428 | ||
4429 | static ssize_t | |
fd01b88c | 4430 | sync_max_show(struct mddev *mddev, char *page) |
88202a0c N |
4431 | { |
4432 | return sprintf(page, "%d (%s)\n", speed_max(mddev), | |
4433 | mddev->sync_speed_max ? "local": "system"); | |
4434 | } | |
4435 | ||
4436 | static ssize_t | |
fd01b88c | 4437 | sync_max_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4438 | { |
4c9309c0 AD |
4439 | unsigned int max; |
4440 | int rv; | |
4441 | ||
88202a0c | 4442 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4443 | max = 0; |
4444 | } else { | |
4445 | rv = kstrtouint(buf, 10, &max); | |
4446 | if (rv < 0) | |
4447 | return rv; | |
4448 | if (max == 0) | |
4449 | return -EINVAL; | |
88202a0c | 4450 | } |
88202a0c N |
4451 | mddev->sync_speed_max = max; |
4452 | return len; | |
4453 | } | |
4454 | ||
4455 | static struct md_sysfs_entry md_sync_max = | |
4456 | __ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store); | |
4457 | ||
d7f3d291 | 4458 | static ssize_t |
fd01b88c | 4459 | degraded_show(struct mddev *mddev, char *page) |
d7f3d291 IP |
4460 | { |
4461 | return sprintf(page, "%d\n", mddev->degraded); | |
4462 | } | |
4463 | static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded); | |
88202a0c | 4464 | |
90b08710 | 4465 | static ssize_t |
fd01b88c | 4466 | sync_force_parallel_show(struct mddev *mddev, char *page) |
90b08710 BS |
4467 | { |
4468 | return sprintf(page, "%d\n", mddev->parallel_resync); | |
4469 | } | |
4470 | ||
4471 | static ssize_t | |
fd01b88c | 4472 | sync_force_parallel_store(struct mddev *mddev, const char *buf, size_t len) |
90b08710 BS |
4473 | { |
4474 | long n; | |
4475 | ||
b29bebd6 | 4476 | if (kstrtol(buf, 10, &n)) |
90b08710 BS |
4477 | return -EINVAL; |
4478 | ||
4479 | if (n != 0 && n != 1) | |
4480 | return -EINVAL; | |
4481 | ||
4482 | mddev->parallel_resync = n; | |
4483 | ||
4484 | if (mddev->sync_thread) | |
4485 | wake_up(&resync_wait); | |
4486 | ||
4487 | return len; | |
4488 | } | |
4489 | ||
4490 | /* force parallel resync, even with shared block devices */ | |
4491 | static struct md_sysfs_entry md_sync_force_parallel = | |
4492 | __ATTR(sync_force_parallel, S_IRUGO|S_IWUSR, | |
4493 | sync_force_parallel_show, sync_force_parallel_store); | |
4494 | ||
88202a0c | 4495 | static ssize_t |
fd01b88c | 4496 | sync_speed_show(struct mddev *mddev, char *page) |
88202a0c N |
4497 | { |
4498 | unsigned long resync, dt, db; | |
d1a7c503 N |
4499 | if (mddev->curr_resync == 0) |
4500 | return sprintf(page, "none\n"); | |
9687a60c AN |
4501 | resync = mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active); |
4502 | dt = (jiffies - mddev->resync_mark) / HZ; | |
88202a0c | 4503 | if (!dt) dt++; |
9687a60c AN |
4504 | db = resync - mddev->resync_mark_cnt; |
4505 | return sprintf(page, "%lu\n", db/dt/2); /* K/sec */ | |
88202a0c N |
4506 | } |
4507 | ||
80ca3a44 | 4508 | static struct md_sysfs_entry md_sync_speed = __ATTR_RO(sync_speed); |
88202a0c N |
4509 | |
4510 | static ssize_t | |
fd01b88c | 4511 | sync_completed_show(struct mddev *mddev, char *page) |
88202a0c | 4512 | { |
13ae864b | 4513 | unsigned long long max_sectors, resync; |
88202a0c | 4514 | |
acb180b0 N |
4515 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4516 | return sprintf(page, "none\n"); | |
4517 | ||
72f36d59 N |
4518 | if (mddev->curr_resync == 1 || |
4519 | mddev->curr_resync == 2) | |
4520 | return sprintf(page, "delayed\n"); | |
4521 | ||
c804cdec N |
4522 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
4523 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
58c0fed4 | 4524 | max_sectors = mddev->resync_max_sectors; |
88202a0c | 4525 | else |
58c0fed4 | 4526 | max_sectors = mddev->dev_sectors; |
88202a0c | 4527 | |
acb180b0 | 4528 | resync = mddev->curr_resync_completed; |
13ae864b | 4529 | return sprintf(page, "%llu / %llu\n", resync, max_sectors); |
88202a0c N |
4530 | } |
4531 | ||
750f199e N |
4532 | static struct md_sysfs_entry md_sync_completed = |
4533 | __ATTR_PREALLOC(sync_completed, S_IRUGO, sync_completed_show, NULL); | |
88202a0c | 4534 | |
5e96ee65 | 4535 | static ssize_t |
fd01b88c | 4536 | min_sync_show(struct mddev *mddev, char *page) |
5e96ee65 NB |
4537 | { |
4538 | return sprintf(page, "%llu\n", | |
4539 | (unsigned long long)mddev->resync_min); | |
4540 | } | |
4541 | static ssize_t | |
fd01b88c | 4542 | min_sync_store(struct mddev *mddev, const char *buf, size_t len) |
5e96ee65 NB |
4543 | { |
4544 | unsigned long long min; | |
23da422b | 4545 | int err; |
23da422b | 4546 | |
b29bebd6 | 4547 | if (kstrtoull(buf, 10, &min)) |
5e96ee65 | 4548 | return -EINVAL; |
23da422b N |
4549 | |
4550 | spin_lock(&mddev->lock); | |
4551 | err = -EINVAL; | |
5e96ee65 | 4552 | if (min > mddev->resync_max) |
23da422b N |
4553 | goto out_unlock; |
4554 | ||
4555 | err = -EBUSY; | |
5e96ee65 | 4556 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 4557 | goto out_unlock; |
5e96ee65 | 4558 | |
50c37b13 N |
4559 | /* Round down to multiple of 4K for safety */ |
4560 | mddev->resync_min = round_down(min, 8); | |
23da422b | 4561 | err = 0; |
5e96ee65 | 4562 | |
23da422b N |
4563 | out_unlock: |
4564 | spin_unlock(&mddev->lock); | |
4565 | return err ?: len; | |
5e96ee65 NB |
4566 | } |
4567 | ||
4568 | static struct md_sysfs_entry md_min_sync = | |
4569 | __ATTR(sync_min, S_IRUGO|S_IWUSR, min_sync_show, min_sync_store); | |
4570 | ||
c6207277 | 4571 | static ssize_t |
fd01b88c | 4572 | max_sync_show(struct mddev *mddev, char *page) |
c6207277 N |
4573 | { |
4574 | if (mddev->resync_max == MaxSector) | |
4575 | return sprintf(page, "max\n"); | |
4576 | else | |
4577 | return sprintf(page, "%llu\n", | |
4578 | (unsigned long long)mddev->resync_max); | |
4579 | } | |
4580 | static ssize_t | |
fd01b88c | 4581 | max_sync_store(struct mddev *mddev, const char *buf, size_t len) |
c6207277 | 4582 | { |
23da422b N |
4583 | int err; |
4584 | spin_lock(&mddev->lock); | |
c6207277 N |
4585 | if (strncmp(buf, "max", 3) == 0) |
4586 | mddev->resync_max = MaxSector; | |
4587 | else { | |
5e96ee65 | 4588 | unsigned long long max; |
23da422b N |
4589 | int chunk; |
4590 | ||
4591 | err = -EINVAL; | |
b29bebd6 | 4592 | if (kstrtoull(buf, 10, &max)) |
23da422b | 4593 | goto out_unlock; |
5e96ee65 | 4594 | if (max < mddev->resync_min) |
23da422b N |
4595 | goto out_unlock; |
4596 | ||
4597 | err = -EBUSY; | |
c6207277 | 4598 | if (max < mddev->resync_max && |
4d484a4a | 4599 | mddev->ro == 0 && |
c6207277 | 4600 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 4601 | goto out_unlock; |
c6207277 N |
4602 | |
4603 | /* Must be a multiple of chunk_size */ | |
23da422b N |
4604 | chunk = mddev->chunk_sectors; |
4605 | if (chunk) { | |
2ac06c33 | 4606 | sector_t temp = max; |
23da422b N |
4607 | |
4608 | err = -EINVAL; | |
4609 | if (sector_div(temp, chunk)) | |
4610 | goto out_unlock; | |
c6207277 N |
4611 | } |
4612 | mddev->resync_max = max; | |
4613 | } | |
4614 | wake_up(&mddev->recovery_wait); | |
23da422b N |
4615 | err = 0; |
4616 | out_unlock: | |
4617 | spin_unlock(&mddev->lock); | |
4618 | return err ?: len; | |
c6207277 N |
4619 | } |
4620 | ||
4621 | static struct md_sysfs_entry md_max_sync = | |
4622 | __ATTR(sync_max, S_IRUGO|S_IWUSR, max_sync_show, max_sync_store); | |
4623 | ||
e464eafd | 4624 | static ssize_t |
fd01b88c | 4625 | suspend_lo_show(struct mddev *mddev, char *page) |
e464eafd N |
4626 | { |
4627 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_lo); | |
4628 | } | |
4629 | ||
4630 | static ssize_t | |
fd01b88c | 4631 | suspend_lo_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 4632 | { |
4c9309c0 | 4633 | unsigned long long old, new; |
6791875e | 4634 | int err; |
e464eafd | 4635 | |
4c9309c0 AD |
4636 | err = kstrtoull(buf, 10, &new); |
4637 | if (err < 0) | |
4638 | return err; | |
4639 | if (new != (sector_t)new) | |
e464eafd | 4640 | return -EINVAL; |
23ddff37 | 4641 | |
6791875e N |
4642 | err = mddev_lock(mddev); |
4643 | if (err) | |
4644 | return err; | |
4645 | err = -EINVAL; | |
4646 | if (mddev->pers == NULL || | |
4647 | mddev->pers->quiesce == NULL) | |
4648 | goto unlock; | |
4649 | old = mddev->suspend_lo; | |
23ddff37 N |
4650 | mddev->suspend_lo = new; |
4651 | if (new >= old) | |
4652 | /* Shrinking suspended region */ | |
e464eafd | 4653 | mddev->pers->quiesce(mddev, 2); |
23ddff37 N |
4654 | else { |
4655 | /* Expanding suspended region - need to wait */ | |
4656 | mddev->pers->quiesce(mddev, 1); | |
4657 | mddev->pers->quiesce(mddev, 0); | |
4658 | } | |
6791875e N |
4659 | err = 0; |
4660 | unlock: | |
4661 | mddev_unlock(mddev); | |
4662 | return err ?: len; | |
e464eafd N |
4663 | } |
4664 | static struct md_sysfs_entry md_suspend_lo = | |
4665 | __ATTR(suspend_lo, S_IRUGO|S_IWUSR, suspend_lo_show, suspend_lo_store); | |
4666 | ||
e464eafd | 4667 | static ssize_t |
fd01b88c | 4668 | suspend_hi_show(struct mddev *mddev, char *page) |
e464eafd N |
4669 | { |
4670 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_hi); | |
4671 | } | |
4672 | ||
4673 | static ssize_t | |
fd01b88c | 4674 | suspend_hi_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 4675 | { |
4c9309c0 | 4676 | unsigned long long old, new; |
6791875e | 4677 | int err; |
e464eafd | 4678 | |
4c9309c0 AD |
4679 | err = kstrtoull(buf, 10, &new); |
4680 | if (err < 0) | |
4681 | return err; | |
4682 | if (new != (sector_t)new) | |
e464eafd | 4683 | return -EINVAL; |
23ddff37 | 4684 | |
6791875e N |
4685 | err = mddev_lock(mddev); |
4686 | if (err) | |
4687 | return err; | |
4688 | err = -EINVAL; | |
4689 | if (mddev->pers == NULL || | |
4690 | mddev->pers->quiesce == NULL) | |
4691 | goto unlock; | |
4692 | old = mddev->suspend_hi; | |
23ddff37 N |
4693 | mddev->suspend_hi = new; |
4694 | if (new <= old) | |
4695 | /* Shrinking suspended region */ | |
4696 | mddev->pers->quiesce(mddev, 2); | |
4697 | else { | |
4698 | /* Expanding suspended region - need to wait */ | |
e464eafd N |
4699 | mddev->pers->quiesce(mddev, 1); |
4700 | mddev->pers->quiesce(mddev, 0); | |
23ddff37 | 4701 | } |
6791875e N |
4702 | err = 0; |
4703 | unlock: | |
4704 | mddev_unlock(mddev); | |
4705 | return err ?: len; | |
e464eafd N |
4706 | } |
4707 | static struct md_sysfs_entry md_suspend_hi = | |
4708 | __ATTR(suspend_hi, S_IRUGO|S_IWUSR, suspend_hi_show, suspend_hi_store); | |
4709 | ||
08a02ecd | 4710 | static ssize_t |
fd01b88c | 4711 | reshape_position_show(struct mddev *mddev, char *page) |
08a02ecd N |
4712 | { |
4713 | if (mddev->reshape_position != MaxSector) | |
4714 | return sprintf(page, "%llu\n", | |
4715 | (unsigned long long)mddev->reshape_position); | |
4716 | strcpy(page, "none\n"); | |
4717 | return 5; | |
4718 | } | |
4719 | ||
4720 | static ssize_t | |
fd01b88c | 4721 | reshape_position_store(struct mddev *mddev, const char *buf, size_t len) |
08a02ecd | 4722 | { |
c6563a8c | 4723 | struct md_rdev *rdev; |
4c9309c0 | 4724 | unsigned long long new; |
6791875e | 4725 | int err; |
6791875e | 4726 | |
4c9309c0 AD |
4727 | err = kstrtoull(buf, 10, &new); |
4728 | if (err < 0) | |
4729 | return err; | |
4730 | if (new != (sector_t)new) | |
08a02ecd | 4731 | return -EINVAL; |
6791875e N |
4732 | err = mddev_lock(mddev); |
4733 | if (err) | |
4734 | return err; | |
4735 | err = -EBUSY; | |
4736 | if (mddev->pers) | |
4737 | goto unlock; | |
08a02ecd N |
4738 | mddev->reshape_position = new; |
4739 | mddev->delta_disks = 0; | |
2c810cdd | 4740 | mddev->reshape_backwards = 0; |
08a02ecd N |
4741 | mddev->new_level = mddev->level; |
4742 | mddev->new_layout = mddev->layout; | |
664e7c41 | 4743 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
c6563a8c N |
4744 | rdev_for_each(rdev, mddev) |
4745 | rdev->new_data_offset = rdev->data_offset; | |
6791875e N |
4746 | err = 0; |
4747 | unlock: | |
4748 | mddev_unlock(mddev); | |
4749 | return err ?: len; | |
08a02ecd N |
4750 | } |
4751 | ||
4752 | static struct md_sysfs_entry md_reshape_position = | |
4753 | __ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show, | |
4754 | reshape_position_store); | |
4755 | ||
2c810cdd N |
4756 | static ssize_t |
4757 | reshape_direction_show(struct mddev *mddev, char *page) | |
4758 | { | |
4759 | return sprintf(page, "%s\n", | |
4760 | mddev->reshape_backwards ? "backwards" : "forwards"); | |
4761 | } | |
4762 | ||
4763 | static ssize_t | |
4764 | reshape_direction_store(struct mddev *mddev, const char *buf, size_t len) | |
4765 | { | |
4766 | int backwards = 0; | |
6791875e N |
4767 | int err; |
4768 | ||
2c810cdd N |
4769 | if (cmd_match(buf, "forwards")) |
4770 | backwards = 0; | |
4771 | else if (cmd_match(buf, "backwards")) | |
4772 | backwards = 1; | |
4773 | else | |
4774 | return -EINVAL; | |
4775 | if (mddev->reshape_backwards == backwards) | |
4776 | return len; | |
4777 | ||
6791875e N |
4778 | err = mddev_lock(mddev); |
4779 | if (err) | |
4780 | return err; | |
2c810cdd N |
4781 | /* check if we are allowed to change */ |
4782 | if (mddev->delta_disks) | |
6791875e N |
4783 | err = -EBUSY; |
4784 | else if (mddev->persistent && | |
2c810cdd | 4785 | mddev->major_version == 0) |
6791875e N |
4786 | err = -EINVAL; |
4787 | else | |
4788 | mddev->reshape_backwards = backwards; | |
4789 | mddev_unlock(mddev); | |
4790 | return err ?: len; | |
2c810cdd N |
4791 | } |
4792 | ||
4793 | static struct md_sysfs_entry md_reshape_direction = | |
4794 | __ATTR(reshape_direction, S_IRUGO|S_IWUSR, reshape_direction_show, | |
4795 | reshape_direction_store); | |
4796 | ||
b522adcd | 4797 | static ssize_t |
fd01b88c | 4798 | array_size_show(struct mddev *mddev, char *page) |
b522adcd DW |
4799 | { |
4800 | if (mddev->external_size) | |
4801 | return sprintf(page, "%llu\n", | |
4802 | (unsigned long long)mddev->array_sectors/2); | |
4803 | else | |
4804 | return sprintf(page, "default\n"); | |
4805 | } | |
4806 | ||
4807 | static ssize_t | |
fd01b88c | 4808 | array_size_store(struct mddev *mddev, const char *buf, size_t len) |
b522adcd DW |
4809 | { |
4810 | sector_t sectors; | |
6791875e N |
4811 | int err; |
4812 | ||
4813 | err = mddev_lock(mddev); | |
4814 | if (err) | |
4815 | return err; | |
b522adcd DW |
4816 | |
4817 | if (strncmp(buf, "default", 7) == 0) { | |
4818 | if (mddev->pers) | |
4819 | sectors = mddev->pers->size(mddev, 0, 0); | |
4820 | else | |
4821 | sectors = mddev->array_sectors; | |
4822 | ||
4823 | mddev->external_size = 0; | |
4824 | } else { | |
4825 | if (strict_blocks_to_sectors(buf, §ors) < 0) | |
6791875e N |
4826 | err = -EINVAL; |
4827 | else if (mddev->pers && mddev->pers->size(mddev, 0, 0) < sectors) | |
4828 | err = -E2BIG; | |
4829 | else | |
4830 | mddev->external_size = 1; | |
b522adcd DW |
4831 | } |
4832 | ||
6791875e N |
4833 | if (!err) { |
4834 | mddev->array_sectors = sectors; | |
4835 | if (mddev->pers) { | |
4836 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
4837 | revalidate_disk(mddev->gendisk); | |
4838 | } | |
cbe6ef1d | 4839 | } |
6791875e N |
4840 | mddev_unlock(mddev); |
4841 | return err ?: len; | |
b522adcd DW |
4842 | } |
4843 | ||
4844 | static struct md_sysfs_entry md_array_size = | |
4845 | __ATTR(array_size, S_IRUGO|S_IWUSR, array_size_show, | |
4846 | array_size_store); | |
e464eafd | 4847 | |
eae1701f N |
4848 | static struct attribute *md_default_attrs[] = { |
4849 | &md_level.attr, | |
d4dbd025 | 4850 | &md_layout.attr, |
eae1701f | 4851 | &md_raid_disks.attr, |
3b34380a | 4852 | &md_chunk_size.attr, |
a35b0d69 | 4853 | &md_size.attr, |
a94213b1 | 4854 | &md_resync_start.attr, |
8bb93aac | 4855 | &md_metadata.attr, |
6d7ff738 | 4856 | &md_new_device.attr, |
16f17b39 | 4857 | &md_safe_delay.attr, |
9e653b63 | 4858 | &md_array_state.attr, |
08a02ecd | 4859 | &md_reshape_position.attr, |
2c810cdd | 4860 | &md_reshape_direction.attr, |
b522adcd | 4861 | &md_array_size.attr, |
1e50915f | 4862 | &max_corr_read_errors.attr, |
411036fa N |
4863 | NULL, |
4864 | }; | |
4865 | ||
4866 | static struct attribute *md_redundancy_attrs[] = { | |
24dd469d | 4867 | &md_scan_mode.attr, |
c4a39551 | 4868 | &md_last_scan_mode.attr, |
9d88883e | 4869 | &md_mismatches.attr, |
88202a0c N |
4870 | &md_sync_min.attr, |
4871 | &md_sync_max.attr, | |
4872 | &md_sync_speed.attr, | |
90b08710 | 4873 | &md_sync_force_parallel.attr, |
88202a0c | 4874 | &md_sync_completed.attr, |
5e96ee65 | 4875 | &md_min_sync.attr, |
c6207277 | 4876 | &md_max_sync.attr, |
e464eafd N |
4877 | &md_suspend_lo.attr, |
4878 | &md_suspend_hi.attr, | |
9b1d1dac | 4879 | &md_bitmap.attr, |
d7f3d291 | 4880 | &md_degraded.attr, |
eae1701f N |
4881 | NULL, |
4882 | }; | |
411036fa N |
4883 | static struct attribute_group md_redundancy_group = { |
4884 | .name = NULL, | |
4885 | .attrs = md_redundancy_attrs, | |
4886 | }; | |
4887 | ||
eae1701f N |
4888 | static ssize_t |
4889 | md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
4890 | { | |
4891 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 4892 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 4893 | ssize_t rv; |
eae1701f N |
4894 | |
4895 | if (!entry->show) | |
4896 | return -EIO; | |
af8a2434 N |
4897 | spin_lock(&all_mddevs_lock); |
4898 | if (list_empty(&mddev->all_mddevs)) { | |
4899 | spin_unlock(&all_mddevs_lock); | |
4900 | return -EBUSY; | |
4901 | } | |
4902 | mddev_get(mddev); | |
4903 | spin_unlock(&all_mddevs_lock); | |
4904 | ||
b7b17c9b | 4905 | rv = entry->show(mddev, page); |
af8a2434 | 4906 | mddev_put(mddev); |
96de1e66 | 4907 | return rv; |
eae1701f N |
4908 | } |
4909 | ||
4910 | static ssize_t | |
4911 | md_attr_store(struct kobject *kobj, struct attribute *attr, | |
4912 | const char *page, size_t length) | |
4913 | { | |
4914 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 4915 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 4916 | ssize_t rv; |
eae1701f N |
4917 | |
4918 | if (!entry->store) | |
4919 | return -EIO; | |
67463acb N |
4920 | if (!capable(CAP_SYS_ADMIN)) |
4921 | return -EACCES; | |
af8a2434 N |
4922 | spin_lock(&all_mddevs_lock); |
4923 | if (list_empty(&mddev->all_mddevs)) { | |
4924 | spin_unlock(&all_mddevs_lock); | |
4925 | return -EBUSY; | |
4926 | } | |
4927 | mddev_get(mddev); | |
4928 | spin_unlock(&all_mddevs_lock); | |
6791875e | 4929 | rv = entry->store(mddev, page, length); |
af8a2434 | 4930 | mddev_put(mddev); |
96de1e66 | 4931 | return rv; |
eae1701f N |
4932 | } |
4933 | ||
4934 | static void md_free(struct kobject *ko) | |
4935 | { | |
fd01b88c | 4936 | struct mddev *mddev = container_of(ko, struct mddev, kobj); |
a21d1504 N |
4937 | |
4938 | if (mddev->sysfs_state) | |
4939 | sysfs_put(mddev->sysfs_state); | |
4940 | ||
6cd18e71 N |
4941 | if (mddev->queue) |
4942 | blk_cleanup_queue(mddev->queue); | |
a21d1504 N |
4943 | if (mddev->gendisk) { |
4944 | del_gendisk(mddev->gendisk); | |
4945 | put_disk(mddev->gendisk); | |
4946 | } | |
a21d1504 | 4947 | |
eae1701f N |
4948 | kfree(mddev); |
4949 | } | |
4950 | ||
52cf25d0 | 4951 | static const struct sysfs_ops md_sysfs_ops = { |
eae1701f N |
4952 | .show = md_attr_show, |
4953 | .store = md_attr_store, | |
4954 | }; | |
4955 | static struct kobj_type md_ktype = { | |
4956 | .release = md_free, | |
4957 | .sysfs_ops = &md_sysfs_ops, | |
4958 | .default_attrs = md_default_attrs, | |
4959 | }; | |
4960 | ||
1da177e4 LT |
4961 | int mdp_major = 0; |
4962 | ||
5fd3a17e DW |
4963 | static void mddev_delayed_delete(struct work_struct *ws) |
4964 | { | |
fd01b88c | 4965 | struct mddev *mddev = container_of(ws, struct mddev, del_work); |
5fd3a17e | 4966 | |
43a70507 | 4967 | sysfs_remove_group(&mddev->kobj, &md_bitmap_group); |
5fd3a17e DW |
4968 | kobject_del(&mddev->kobj); |
4969 | kobject_put(&mddev->kobj); | |
4970 | } | |
4971 | ||
efeb53c0 | 4972 | static int md_alloc(dev_t dev, char *name) |
1da177e4 | 4973 | { |
48c9c27b | 4974 | static DEFINE_MUTEX(disks_mutex); |
fd01b88c | 4975 | struct mddev *mddev = mddev_find(dev); |
1da177e4 | 4976 | struct gendisk *disk; |
efeb53c0 N |
4977 | int partitioned; |
4978 | int shift; | |
4979 | int unit; | |
3830c62f | 4980 | int error; |
1da177e4 LT |
4981 | |
4982 | if (!mddev) | |
efeb53c0 N |
4983 | return -ENODEV; |
4984 | ||
4985 | partitioned = (MAJOR(mddev->unit) != MD_MAJOR); | |
4986 | shift = partitioned ? MdpMinorShift : 0; | |
4987 | unit = MINOR(mddev->unit) >> shift; | |
1da177e4 | 4988 | |
e804ac78 TH |
4989 | /* wait for any previous instance of this device to be |
4990 | * completely removed (mddev_delayed_delete). | |
d3374825 | 4991 | */ |
e804ac78 | 4992 | flush_workqueue(md_misc_wq); |
d3374825 | 4993 | |
48c9c27b | 4994 | mutex_lock(&disks_mutex); |
0909dc44 N |
4995 | error = -EEXIST; |
4996 | if (mddev->gendisk) | |
4997 | goto abort; | |
efeb53c0 N |
4998 | |
4999 | if (name) { | |
5000 | /* Need to ensure that 'name' is not a duplicate. | |
5001 | */ | |
fd01b88c | 5002 | struct mddev *mddev2; |
efeb53c0 N |
5003 | spin_lock(&all_mddevs_lock); |
5004 | ||
5005 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) | |
5006 | if (mddev2->gendisk && | |
5007 | strcmp(mddev2->gendisk->disk_name, name) == 0) { | |
5008 | spin_unlock(&all_mddevs_lock); | |
0909dc44 | 5009 | goto abort; |
efeb53c0 N |
5010 | } |
5011 | spin_unlock(&all_mddevs_lock); | |
1da177e4 | 5012 | } |
8b765398 | 5013 | |
0909dc44 | 5014 | error = -ENOMEM; |
8b765398 | 5015 | mddev->queue = blk_alloc_queue(GFP_KERNEL); |
0909dc44 N |
5016 | if (!mddev->queue) |
5017 | goto abort; | |
409c57f3 N |
5018 | mddev->queue->queuedata = mddev; |
5019 | ||
409c57f3 | 5020 | blk_queue_make_request(mddev->queue, md_make_request); |
b1bd055d | 5021 | blk_set_stacking_limits(&mddev->queue->limits); |
8b765398 | 5022 | |
1da177e4 LT |
5023 | disk = alloc_disk(1 << shift); |
5024 | if (!disk) { | |
8b765398 N |
5025 | blk_cleanup_queue(mddev->queue); |
5026 | mddev->queue = NULL; | |
0909dc44 | 5027 | goto abort; |
1da177e4 | 5028 | } |
efeb53c0 | 5029 | disk->major = MAJOR(mddev->unit); |
1da177e4 | 5030 | disk->first_minor = unit << shift; |
efeb53c0 N |
5031 | if (name) |
5032 | strcpy(disk->disk_name, name); | |
5033 | else if (partitioned) | |
1da177e4 | 5034 | sprintf(disk->disk_name, "md_d%d", unit); |
ce7b0f46 | 5035 | else |
1da177e4 | 5036 | sprintf(disk->disk_name, "md%d", unit); |
1da177e4 LT |
5037 | disk->fops = &md_fops; |
5038 | disk->private_data = mddev; | |
5039 | disk->queue = mddev->queue; | |
b0140891 | 5040 | blk_queue_flush(mddev->queue, REQ_FLUSH | REQ_FUA); |
92850bbd | 5041 | /* Allow extended partitions. This makes the |
d3374825 | 5042 | * 'mdp' device redundant, but we can't really |
92850bbd N |
5043 | * remove it now. |
5044 | */ | |
5045 | disk->flags |= GENHD_FL_EXT_DEVT; | |
1da177e4 | 5046 | mddev->gendisk = disk; |
b0140891 N |
5047 | /* As soon as we call add_disk(), another thread could get |
5048 | * through to md_open, so make sure it doesn't get too far | |
5049 | */ | |
5050 | mutex_lock(&mddev->open_mutex); | |
5051 | add_disk(disk); | |
5052 | ||
ed9e1982 TH |
5053 | error = kobject_init_and_add(&mddev->kobj, &md_ktype, |
5054 | &disk_to_dev(disk)->kobj, "%s", "md"); | |
0909dc44 N |
5055 | if (error) { |
5056 | /* This isn't possible, but as kobject_init_and_add is marked | |
5057 | * __must_check, we must do something with the result | |
5058 | */ | |
5e55e2f5 N |
5059 | printk(KERN_WARNING "md: cannot register %s/md - name in use\n", |
5060 | disk->disk_name); | |
0909dc44 N |
5061 | error = 0; |
5062 | } | |
00bcb4ac N |
5063 | if (mddev->kobj.sd && |
5064 | sysfs_create_group(&mddev->kobj, &md_bitmap_group)) | |
43a70507 | 5065 | printk(KERN_DEBUG "pointless warning\n"); |
b0140891 | 5066 | mutex_unlock(&mddev->open_mutex); |
0909dc44 N |
5067 | abort: |
5068 | mutex_unlock(&disks_mutex); | |
00bcb4ac | 5069 | if (!error && mddev->kobj.sd) { |
3830c62f | 5070 | kobject_uevent(&mddev->kobj, KOBJ_ADD); |
00bcb4ac | 5071 | mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state"); |
b62b7590 | 5072 | } |
d3374825 | 5073 | mddev_put(mddev); |
0909dc44 | 5074 | return error; |
efeb53c0 N |
5075 | } |
5076 | ||
5077 | static struct kobject *md_probe(dev_t dev, int *part, void *data) | |
5078 | { | |
5079 | md_alloc(dev, NULL); | |
1da177e4 LT |
5080 | return NULL; |
5081 | } | |
5082 | ||
efeb53c0 N |
5083 | static int add_named_array(const char *val, struct kernel_param *kp) |
5084 | { | |
5085 | /* val must be "md_*" where * is not all digits. | |
5086 | * We allocate an array with a large free minor number, and | |
5087 | * set the name to val. val must not already be an active name. | |
5088 | */ | |
5089 | int len = strlen(val); | |
5090 | char buf[DISK_NAME_LEN]; | |
5091 | ||
5092 | while (len && val[len-1] == '\n') | |
5093 | len--; | |
5094 | if (len >= DISK_NAME_LEN) | |
5095 | return -E2BIG; | |
5096 | strlcpy(buf, val, len+1); | |
5097 | if (strncmp(buf, "md_", 3) != 0) | |
5098 | return -EINVAL; | |
5099 | return md_alloc(0, buf); | |
5100 | } | |
5101 | ||
1da177e4 LT |
5102 | static void md_safemode_timeout(unsigned long data) |
5103 | { | |
fd01b88c | 5104 | struct mddev *mddev = (struct mddev *) data; |
1da177e4 | 5105 | |
0fd62b86 NB |
5106 | if (!atomic_read(&mddev->writes_pending)) { |
5107 | mddev->safemode = 1; | |
5108 | if (mddev->external) | |
00bcb4ac | 5109 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 5110 | } |
1da177e4 LT |
5111 | md_wakeup_thread(mddev->thread); |
5112 | } | |
5113 | ||
6ff8d8ec | 5114 | static int start_dirty_degraded; |
1da177e4 | 5115 | |
fd01b88c | 5116 | int md_run(struct mddev *mddev) |
1da177e4 | 5117 | { |
2604b703 | 5118 | int err; |
3cb03002 | 5119 | struct md_rdev *rdev; |
84fc4b56 | 5120 | struct md_personality *pers; |
1da177e4 | 5121 | |
a757e64c N |
5122 | if (list_empty(&mddev->disks)) |
5123 | /* cannot run an array with no devices.. */ | |
1da177e4 | 5124 | return -EINVAL; |
1da177e4 LT |
5125 | |
5126 | if (mddev->pers) | |
5127 | return -EBUSY; | |
bb4f1e9d N |
5128 | /* Cannot run until previous stop completes properly */ |
5129 | if (mddev->sysfs_active) | |
5130 | return -EBUSY; | |
b6eb127d | 5131 | |
1da177e4 LT |
5132 | /* |
5133 | * Analyze all RAID superblock(s) | |
5134 | */ | |
1ec4a939 N |
5135 | if (!mddev->raid_disks) { |
5136 | if (!mddev->persistent) | |
5137 | return -EINVAL; | |
a757e64c | 5138 | analyze_sbs(mddev); |
1ec4a939 | 5139 | } |
1da177e4 | 5140 | |
d9d166c2 N |
5141 | if (mddev->level != LEVEL_NONE) |
5142 | request_module("md-level-%d", mddev->level); | |
5143 | else if (mddev->clevel[0]) | |
5144 | request_module("md-%s", mddev->clevel); | |
1da177e4 LT |
5145 | |
5146 | /* | |
5147 | * Drop all container device buffers, from now on | |
5148 | * the only valid external interface is through the md | |
5149 | * device. | |
1da177e4 | 5150 | */ |
dafb20fa | 5151 | rdev_for_each(rdev, mddev) { |
b2d444d7 | 5152 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
5153 | continue; |
5154 | sync_blockdev(rdev->bdev); | |
f98393a6 | 5155 | invalidate_bdev(rdev->bdev); |
f0d76d70 N |
5156 | |
5157 | /* perform some consistency tests on the device. | |
5158 | * We don't want the data to overlap the metadata, | |
58c0fed4 | 5159 | * Internal Bitmap issues have been handled elsewhere. |
f0d76d70 | 5160 | */ |
a6ff7e08 JB |
5161 | if (rdev->meta_bdev) { |
5162 | /* Nothing to check */; | |
5163 | } else if (rdev->data_offset < rdev->sb_start) { | |
58c0fed4 AN |
5164 | if (mddev->dev_sectors && |
5165 | rdev->data_offset + mddev->dev_sectors | |
0f420358 | 5166 | > rdev->sb_start) { |
f0d76d70 N |
5167 | printk("md: %s: data overlaps metadata\n", |
5168 | mdname(mddev)); | |
5169 | return -EINVAL; | |
5170 | } | |
5171 | } else { | |
0f420358 | 5172 | if (rdev->sb_start + rdev->sb_size/512 |
f0d76d70 N |
5173 | > rdev->data_offset) { |
5174 | printk("md: %s: metadata overlaps data\n", | |
5175 | mdname(mddev)); | |
5176 | return -EINVAL; | |
5177 | } | |
5178 | } | |
00bcb4ac | 5179 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
5180 | } |
5181 | ||
a167f663 | 5182 | if (mddev->bio_set == NULL) |
395c72a7 | 5183 | mddev->bio_set = bioset_create(BIO_POOL_SIZE, 0); |
a167f663 | 5184 | |
1da177e4 | 5185 | spin_lock(&pers_lock); |
d9d166c2 | 5186 | pers = find_pers(mddev->level, mddev->clevel); |
2604b703 | 5187 | if (!pers || !try_module_get(pers->owner)) { |
1da177e4 | 5188 | spin_unlock(&pers_lock); |
d9d166c2 N |
5189 | if (mddev->level != LEVEL_NONE) |
5190 | printk(KERN_WARNING "md: personality for level %d is not loaded!\n", | |
5191 | mddev->level); | |
5192 | else | |
5193 | printk(KERN_WARNING "md: personality for level %s is not loaded!\n", | |
5194 | mddev->clevel); | |
1da177e4 LT |
5195 | return -EINVAL; |
5196 | } | |
1da177e4 | 5197 | spin_unlock(&pers_lock); |
34817e8c N |
5198 | if (mddev->level != pers->level) { |
5199 | mddev->level = pers->level; | |
5200 | mddev->new_level = pers->level; | |
5201 | } | |
d9d166c2 | 5202 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
1da177e4 | 5203 | |
f6705578 | 5204 | if (mddev->reshape_position != MaxSector && |
63c70c4f | 5205 | pers->start_reshape == NULL) { |
f6705578 | 5206 | /* This personality cannot handle reshaping... */ |
f6705578 N |
5207 | module_put(pers->owner); |
5208 | return -EINVAL; | |
5209 | } | |
5210 | ||
7dd5e7c3 N |
5211 | if (pers->sync_request) { |
5212 | /* Warn if this is a potentially silly | |
5213 | * configuration. | |
5214 | */ | |
5215 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 5216 | struct md_rdev *rdev2; |
7dd5e7c3 | 5217 | int warned = 0; |
159ec1fc | 5218 | |
dafb20fa N |
5219 | rdev_for_each(rdev, mddev) |
5220 | rdev_for_each(rdev2, mddev) { | |
7dd5e7c3 N |
5221 | if (rdev < rdev2 && |
5222 | rdev->bdev->bd_contains == | |
5223 | rdev2->bdev->bd_contains) { | |
5224 | printk(KERN_WARNING | |
5225 | "%s: WARNING: %s appears to be" | |
5226 | " on the same physical disk as" | |
5227 | " %s.\n", | |
5228 | mdname(mddev), | |
5229 | bdevname(rdev->bdev,b), | |
5230 | bdevname(rdev2->bdev,b2)); | |
5231 | warned = 1; | |
5232 | } | |
5233 | } | |
159ec1fc | 5234 | |
7dd5e7c3 N |
5235 | if (warned) |
5236 | printk(KERN_WARNING | |
5237 | "True protection against single-disk" | |
5238 | " failure might be compromised.\n"); | |
5239 | } | |
5240 | ||
657390d2 | 5241 | mddev->recovery = 0; |
58c0fed4 AN |
5242 | /* may be over-ridden by personality */ |
5243 | mddev->resync_max_sectors = mddev->dev_sectors; | |
5244 | ||
6ff8d8ec | 5245 | mddev->ok_start_degraded = start_dirty_degraded; |
1da177e4 | 5246 | |
0f9552b5 | 5247 | if (start_readonly && mddev->ro == 0) |
f91de92e N |
5248 | mddev->ro = 2; /* read-only, but switch on first write */ |
5249 | ||
36d091f4 | 5250 | err = pers->run(mddev); |
13e53df3 AN |
5251 | if (err) |
5252 | printk(KERN_ERR "md: pers->run() failed ...\n"); | |
36d091f4 | 5253 | else if (pers->size(mddev, 0, 0) < mddev->array_sectors) { |
b522adcd DW |
5254 | WARN_ONCE(!mddev->external_size, "%s: default size too small," |
5255 | " but 'external_size' not in effect?\n", __func__); | |
5256 | printk(KERN_ERR | |
5257 | "md: invalid array_size %llu > default size %llu\n", | |
5258 | (unsigned long long)mddev->array_sectors / 2, | |
36d091f4 | 5259 | (unsigned long long)pers->size(mddev, 0, 0) / 2); |
b522adcd | 5260 | err = -EINVAL; |
b522adcd | 5261 | } |
36d091f4 | 5262 | if (err == 0 && pers->sync_request && |
ef99bf48 | 5263 | (mddev->bitmap_info.file || mddev->bitmap_info.offset)) { |
f9209a32 GR |
5264 | struct bitmap *bitmap; |
5265 | ||
5266 | bitmap = bitmap_create(mddev, -1); | |
5267 | if (IS_ERR(bitmap)) { | |
5268 | err = PTR_ERR(bitmap); | |
b15c2e57 N |
5269 | printk(KERN_ERR "%s: failed to create bitmap (%d)\n", |
5270 | mdname(mddev), err); | |
f9209a32 GR |
5271 | } else |
5272 | mddev->bitmap = bitmap; | |
5273 | ||
b15c2e57 | 5274 | } |
1da177e4 | 5275 | if (err) { |
5aa61f42 | 5276 | mddev_detach(mddev); |
0c35bd47 N |
5277 | if (mddev->private) |
5278 | pers->free(mddev, mddev->private); | |
bd691922 | 5279 | mddev->private = NULL; |
36d091f4 | 5280 | module_put(pers->owner); |
32a7627c N |
5281 | bitmap_destroy(mddev); |
5282 | return err; | |
1da177e4 | 5283 | } |
5c675f83 N |
5284 | if (mddev->queue) { |
5285 | mddev->queue->backing_dev_info.congested_data = mddev; | |
5286 | mddev->queue->backing_dev_info.congested_fn = md_congested; | |
5287 | } | |
36d091f4 | 5288 | if (pers->sync_request) { |
00bcb4ac N |
5289 | if (mddev->kobj.sd && |
5290 | sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
5e55e2f5 N |
5291 | printk(KERN_WARNING |
5292 | "md: cannot register extra attributes for %s\n", | |
5293 | mdname(mddev)); | |
00bcb4ac | 5294 | mddev->sysfs_action = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_action"); |
5e55e2f5 | 5295 | } else if (mddev->ro == 2) /* auto-readonly not meaningful */ |
fd9d49ca N |
5296 | mddev->ro = 0; |
5297 | ||
f72ffdd6 | 5298 | atomic_set(&mddev->writes_pending,0); |
1e50915f RB |
5299 | atomic_set(&mddev->max_corr_read_errors, |
5300 | MD_DEFAULT_MAX_CORRECTED_READ_ERRORS); | |
1da177e4 | 5301 | mddev->safemode = 0; |
28c1b9fd GR |
5302 | if (mddev_is_clustered(mddev)) |
5303 | mddev->safemode_delay = 0; | |
5304 | else | |
5305 | mddev->safemode_delay = (200 * HZ)/1000 +1; /* 200 msec delay */ | |
1da177e4 | 5306 | mddev->in_sync = 1; |
0ca69886 | 5307 | smp_wmb(); |
36d091f4 N |
5308 | spin_lock(&mddev->lock); |
5309 | mddev->pers = pers; | |
36d091f4 | 5310 | spin_unlock(&mddev->lock); |
dafb20fa | 5311 | rdev_for_each(rdev, mddev) |
36fad858 NK |
5312 | if (rdev->raid_disk >= 0) |
5313 | if (sysfs_link_rdev(mddev, rdev)) | |
00bcb4ac | 5314 | /* failure here is OK */; |
f72ffdd6 | 5315 | |
a4a3d26d N |
5316 | if (mddev->degraded && !mddev->ro) |
5317 | /* This ensures that recovering status is reported immediately | |
5318 | * via sysfs - until a lack of spares is confirmed. | |
5319 | */ | |
5320 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
1da177e4 | 5321 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f72ffdd6 | 5322 | |
7a0a5355 | 5323 | if (mddev->flags & MD_UPDATE_SB_FLAGS) |
850b2b42 | 5324 | md_update_sb(mddev, 0); |
1da177e4 | 5325 | |
d7603b7e | 5326 | md_new_event(mddev); |
00bcb4ac N |
5327 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
5328 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
a99ac971 | 5329 | sysfs_notify(&mddev->kobj, NULL, "degraded"); |
1da177e4 LT |
5330 | return 0; |
5331 | } | |
390ee602 | 5332 | EXPORT_SYMBOL_GPL(md_run); |
1da177e4 | 5333 | |
fd01b88c | 5334 | static int do_md_run(struct mddev *mddev) |
fe60b014 N |
5335 | { |
5336 | int err; | |
5337 | ||
5338 | err = md_run(mddev); | |
5339 | if (err) | |
5340 | goto out; | |
69e51b44 N |
5341 | err = bitmap_load(mddev); |
5342 | if (err) { | |
5343 | bitmap_destroy(mddev); | |
5344 | goto out; | |
5345 | } | |
0fd018af | 5346 | |
28c1b9fd GR |
5347 | if (mddev_is_clustered(mddev)) |
5348 | md_allow_write(mddev); | |
5349 | ||
0fd018af JB |
5350 | md_wakeup_thread(mddev->thread); |
5351 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
5352 | ||
fe60b014 N |
5353 | set_capacity(mddev->gendisk, mddev->array_sectors); |
5354 | revalidate_disk(mddev->gendisk); | |
f0b4f7e2 | 5355 | mddev->changed = 1; |
fe60b014 N |
5356 | kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); |
5357 | out: | |
5358 | return err; | |
5359 | } | |
5360 | ||
fd01b88c | 5361 | static int restart_array(struct mddev *mddev) |
1da177e4 LT |
5362 | { |
5363 | struct gendisk *disk = mddev->gendisk; | |
1da177e4 | 5364 | |
80fab1d7 | 5365 | /* Complain if it has no devices */ |
1da177e4 | 5366 | if (list_empty(&mddev->disks)) |
80fab1d7 AN |
5367 | return -ENXIO; |
5368 | if (!mddev->pers) | |
5369 | return -EINVAL; | |
5370 | if (!mddev->ro) | |
5371 | return -EBUSY; | |
339421de SL |
5372 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) { |
5373 | struct md_rdev *rdev; | |
5374 | bool has_journal = false; | |
5375 | ||
5376 | rcu_read_lock(); | |
5377 | rdev_for_each_rcu(rdev, mddev) { | |
5378 | if (test_bit(Journal, &rdev->flags) && | |
5379 | !test_bit(Faulty, &rdev->flags)) { | |
5380 | has_journal = true; | |
5381 | break; | |
5382 | } | |
5383 | } | |
5384 | rcu_read_unlock(); | |
5385 | ||
5386 | /* Don't restart rw with journal missing/faulty */ | |
5387 | if (!has_journal) | |
5388 | return -EINVAL; | |
5389 | } | |
5390 | ||
80fab1d7 AN |
5391 | mddev->safemode = 0; |
5392 | mddev->ro = 0; | |
5393 | set_disk_ro(disk, 0); | |
5394 | printk(KERN_INFO "md: %s switched to read-write mode.\n", | |
5395 | mdname(mddev)); | |
5396 | /* Kick recovery or resync if necessary */ | |
5397 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
5398 | md_wakeup_thread(mddev->thread); | |
5399 | md_wakeup_thread(mddev->sync_thread); | |
00bcb4ac | 5400 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
80fab1d7 | 5401 | return 0; |
1da177e4 LT |
5402 | } |
5403 | ||
fd01b88c | 5404 | static void md_clean(struct mddev *mddev) |
6177b472 N |
5405 | { |
5406 | mddev->array_sectors = 0; | |
5407 | mddev->external_size = 0; | |
5408 | mddev->dev_sectors = 0; | |
5409 | mddev->raid_disks = 0; | |
5410 | mddev->recovery_cp = 0; | |
5411 | mddev->resync_min = 0; | |
5412 | mddev->resync_max = MaxSector; | |
5413 | mddev->reshape_position = MaxSector; | |
5414 | mddev->external = 0; | |
5415 | mddev->persistent = 0; | |
5416 | mddev->level = LEVEL_NONE; | |
5417 | mddev->clevel[0] = 0; | |
5418 | mddev->flags = 0; | |
5419 | mddev->ro = 0; | |
5420 | mddev->metadata_type[0] = 0; | |
5421 | mddev->chunk_sectors = 0; | |
5422 | mddev->ctime = mddev->utime = 0; | |
5423 | mddev->layout = 0; | |
5424 | mddev->max_disks = 0; | |
5425 | mddev->events = 0; | |
a8707c08 | 5426 | mddev->can_decrease_events = 0; |
6177b472 | 5427 | mddev->delta_disks = 0; |
2c810cdd | 5428 | mddev->reshape_backwards = 0; |
6177b472 N |
5429 | mddev->new_level = LEVEL_NONE; |
5430 | mddev->new_layout = 0; | |
5431 | mddev->new_chunk_sectors = 0; | |
5432 | mddev->curr_resync = 0; | |
7f7583d4 | 5433 | atomic64_set(&mddev->resync_mismatches, 0); |
6177b472 N |
5434 | mddev->suspend_lo = mddev->suspend_hi = 0; |
5435 | mddev->sync_speed_min = mddev->sync_speed_max = 0; | |
5436 | mddev->recovery = 0; | |
5437 | mddev->in_sync = 0; | |
f0b4f7e2 | 5438 | mddev->changed = 0; |
6177b472 | 5439 | mddev->degraded = 0; |
6177b472 | 5440 | mddev->safemode = 0; |
bd691922 | 5441 | mddev->private = NULL; |
6177b472 N |
5442 | mddev->bitmap_info.offset = 0; |
5443 | mddev->bitmap_info.default_offset = 0; | |
6409bb05 | 5444 | mddev->bitmap_info.default_space = 0; |
6177b472 N |
5445 | mddev->bitmap_info.chunksize = 0; |
5446 | mddev->bitmap_info.daemon_sleep = 0; | |
5447 | mddev->bitmap_info.max_write_behind = 0; | |
5448 | } | |
5449 | ||
fd01b88c | 5450 | static void __md_stop_writes(struct mddev *mddev) |
a047e125 | 5451 | { |
6b6204ee | 5452 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
f851b60d | 5453 | flush_workqueue(md_misc_wq); |
a047e125 | 5454 | if (mddev->sync_thread) { |
a047e125 | 5455 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
a91d5ac0 | 5456 | md_reap_sync_thread(mddev); |
a047e125 N |
5457 | } |
5458 | ||
5459 | del_timer_sync(&mddev->safemode_timer); | |
5460 | ||
5461 | bitmap_flush(mddev); | |
5462 | md_super_wait(mddev); | |
5463 | ||
b6d428c6 | 5464 | if (mddev->ro == 0 && |
28c1b9fd GR |
5465 | ((!mddev->in_sync && !mddev_is_clustered(mddev)) || |
5466 | (mddev->flags & MD_UPDATE_SB_FLAGS))) { | |
a047e125 | 5467 | /* mark array as shutdown cleanly */ |
28c1b9fd GR |
5468 | if (!mddev_is_clustered(mddev)) |
5469 | mddev->in_sync = 1; | |
a047e125 N |
5470 | md_update_sb(mddev, 1); |
5471 | } | |
5472 | } | |
defad61a | 5473 | |
fd01b88c | 5474 | void md_stop_writes(struct mddev *mddev) |
defad61a | 5475 | { |
29f097c4 | 5476 | mddev_lock_nointr(mddev); |
defad61a N |
5477 | __md_stop_writes(mddev); |
5478 | mddev_unlock(mddev); | |
5479 | } | |
390ee602 | 5480 | EXPORT_SYMBOL_GPL(md_stop_writes); |
a047e125 | 5481 | |
5aa61f42 N |
5482 | static void mddev_detach(struct mddev *mddev) |
5483 | { | |
5484 | struct bitmap *bitmap = mddev->bitmap; | |
5485 | /* wait for behind writes to complete */ | |
5486 | if (bitmap && atomic_read(&bitmap->behind_writes) > 0) { | |
5487 | printk(KERN_INFO "md:%s: behind writes in progress - waiting to stop.\n", | |
5488 | mdname(mddev)); | |
5489 | /* need to kick something here to make sure I/O goes? */ | |
5490 | wait_event(bitmap->behind_wait, | |
5491 | atomic_read(&bitmap->behind_writes) == 0); | |
5492 | } | |
36d091f4 | 5493 | if (mddev->pers && mddev->pers->quiesce) { |
5aa61f42 N |
5494 | mddev->pers->quiesce(mddev, 1); |
5495 | mddev->pers->quiesce(mddev, 0); | |
5496 | } | |
5497 | md_unregister_thread(&mddev->thread); | |
5498 | if (mddev->queue) | |
5499 | blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ | |
5500 | } | |
5501 | ||
5eff3c43 | 5502 | static void __md_stop(struct mddev *mddev) |
6177b472 | 5503 | { |
36d091f4 | 5504 | struct md_personality *pers = mddev->pers; |
5aa61f42 | 5505 | mddev_detach(mddev); |
ee5d004f N |
5506 | /* Ensure ->event_work is done */ |
5507 | flush_workqueue(md_misc_wq); | |
36d091f4 | 5508 | spin_lock(&mddev->lock); |
6177b472 | 5509 | mddev->pers = NULL; |
36d091f4 N |
5510 | spin_unlock(&mddev->lock); |
5511 | pers->free(mddev, mddev->private); | |
bd691922 | 5512 | mddev->private = NULL; |
36d091f4 N |
5513 | if (pers->sync_request && mddev->to_remove == NULL) |
5514 | mddev->to_remove = &md_redundancy_group; | |
5515 | module_put(pers->owner); | |
cca9cf90 | 5516 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
6177b472 | 5517 | } |
5eff3c43 N |
5518 | |
5519 | void md_stop(struct mddev *mddev) | |
5520 | { | |
5521 | /* stop the array and free an attached data structures. | |
5522 | * This is called from dm-raid | |
5523 | */ | |
5524 | __md_stop(mddev); | |
5525 | bitmap_destroy(mddev); | |
5526 | if (mddev->bio_set) | |
5527 | bioset_free(mddev->bio_set); | |
5528 | } | |
5529 | ||
390ee602 | 5530 | EXPORT_SYMBOL_GPL(md_stop); |
6177b472 | 5531 | |
a05b7ea0 | 5532 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) |
a4bd82d0 N |
5533 | { |
5534 | int err = 0; | |
30b8feb7 N |
5535 | int did_freeze = 0; |
5536 | ||
5537 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
5538 | did_freeze = 1; | |
5539 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
5540 | md_wakeup_thread(mddev->thread); | |
5541 | } | |
f851b60d | 5542 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 5543 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 5544 | if (mddev->sync_thread) |
30b8feb7 N |
5545 | /* Thread might be blocked waiting for metadata update |
5546 | * which will now never happen */ | |
5547 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 5548 | |
88724bfa N |
5549 | if (mddev->external && test_bit(MD_CHANGE_PENDING, &mddev->flags)) |
5550 | return -EBUSY; | |
30b8feb7 | 5551 | mddev_unlock(mddev); |
f851b60d N |
5552 | wait_event(resync_wait, !test_bit(MD_RECOVERY_RUNNING, |
5553 | &mddev->recovery)); | |
88724bfa N |
5554 | wait_event(mddev->sb_wait, |
5555 | !test_bit(MD_CHANGE_PENDING, &mddev->flags)); | |
30b8feb7 N |
5556 | mddev_lock_nointr(mddev); |
5557 | ||
a4bd82d0 | 5558 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 5559 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 | 5560 | mddev->sync_thread || |
f851b60d | 5561 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
30b8feb7 | 5562 | (bdev && !test_bit(MD_STILL_CLOSED, &mddev->flags))) { |
a4bd82d0 | 5563 | printk("md: %s still in use.\n",mdname(mddev)); |
30b8feb7 N |
5564 | if (did_freeze) { |
5565 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 5566 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
5567 | md_wakeup_thread(mddev->thread); |
5568 | } | |
a4bd82d0 N |
5569 | err = -EBUSY; |
5570 | goto out; | |
5571 | } | |
5572 | if (mddev->pers) { | |
defad61a | 5573 | __md_stop_writes(mddev); |
a4bd82d0 N |
5574 | |
5575 | err = -ENXIO; | |
5576 | if (mddev->ro==1) | |
5577 | goto out; | |
5578 | mddev->ro = 1; | |
5579 | set_disk_ro(mddev->gendisk, 1); | |
5580 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d N |
5581 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
5582 | md_wakeup_thread(mddev->thread); | |
00bcb4ac | 5583 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
30b8feb7 | 5584 | err = 0; |
a4bd82d0 N |
5585 | } |
5586 | out: | |
5587 | mutex_unlock(&mddev->open_mutex); | |
5588 | return err; | |
5589 | } | |
5590 | ||
9e653b63 N |
5591 | /* mode: |
5592 | * 0 - completely stop and dis-assemble array | |
9e653b63 N |
5593 | * 2 - stop but do not disassemble array |
5594 | */ | |
f72ffdd6 | 5595 | static int do_md_stop(struct mddev *mddev, int mode, |
a05b7ea0 | 5596 | struct block_device *bdev) |
1da177e4 | 5597 | { |
1da177e4 | 5598 | struct gendisk *disk = mddev->gendisk; |
3cb03002 | 5599 | struct md_rdev *rdev; |
30b8feb7 N |
5600 | int did_freeze = 0; |
5601 | ||
5602 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
5603 | did_freeze = 1; | |
5604 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
5605 | md_wakeup_thread(mddev->thread); | |
5606 | } | |
f851b60d | 5607 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 5608 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 5609 | if (mddev->sync_thread) |
30b8feb7 N |
5610 | /* Thread might be blocked waiting for metadata update |
5611 | * which will now never happen */ | |
5612 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 5613 | |
30b8feb7 | 5614 | mddev_unlock(mddev); |
f851b60d N |
5615 | wait_event(resync_wait, (mddev->sync_thread == NULL && |
5616 | !test_bit(MD_RECOVERY_RUNNING, | |
5617 | &mddev->recovery))); | |
30b8feb7 | 5618 | mddev_lock_nointr(mddev); |
1da177e4 | 5619 | |
c8c00a69 | 5620 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 5621 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 N |
5622 | mddev->sysfs_active || |
5623 | mddev->sync_thread || | |
f851b60d | 5624 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
30b8feb7 | 5625 | (bdev && !test_bit(MD_STILL_CLOSED, &mddev->flags))) { |
df5b20cf | 5626 | printk("md: %s still in use.\n",mdname(mddev)); |
6e17b027 | 5627 | mutex_unlock(&mddev->open_mutex); |
30b8feb7 N |
5628 | if (did_freeze) { |
5629 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 5630 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
5631 | md_wakeup_thread(mddev->thread); |
5632 | } | |
260fa034 N |
5633 | return -EBUSY; |
5634 | } | |
6e17b027 | 5635 | if (mddev->pers) { |
a4bd82d0 N |
5636 | if (mddev->ro) |
5637 | set_disk_ro(disk, 0); | |
409c57f3 | 5638 | |
defad61a | 5639 | __md_stop_writes(mddev); |
5eff3c43 | 5640 | __md_stop(mddev); |
a4bd82d0 | 5641 | mddev->queue->backing_dev_info.congested_fn = NULL; |
6177b472 | 5642 | |
a4bd82d0 | 5643 | /* tell userspace to handle 'inactive' */ |
00bcb4ac | 5644 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0d4ca600 | 5645 | |
dafb20fa | 5646 | rdev_for_each(rdev, mddev) |
36fad858 NK |
5647 | if (rdev->raid_disk >= 0) |
5648 | sysfs_unlink_rdev(mddev, rdev); | |
c4647292 | 5649 | |
a4bd82d0 | 5650 | set_capacity(disk, 0); |
6e17b027 | 5651 | mutex_unlock(&mddev->open_mutex); |
f0b4f7e2 | 5652 | mddev->changed = 1; |
a4bd82d0 | 5653 | revalidate_disk(disk); |
0d4ca600 | 5654 | |
a4bd82d0 N |
5655 | if (mddev->ro) |
5656 | mddev->ro = 0; | |
6e17b027 N |
5657 | } else |
5658 | mutex_unlock(&mddev->open_mutex); | |
1da177e4 LT |
5659 | /* |
5660 | * Free resources if final stop | |
5661 | */ | |
9e653b63 | 5662 | if (mode == 0) { |
1da177e4 LT |
5663 | printk(KERN_INFO "md: %s stopped.\n", mdname(mddev)); |
5664 | ||
978f946b | 5665 | bitmap_destroy(mddev); |
c3d9714e | 5666 | if (mddev->bitmap_info.file) { |
4af1a041 N |
5667 | struct file *f = mddev->bitmap_info.file; |
5668 | spin_lock(&mddev->lock); | |
c3d9714e | 5669 | mddev->bitmap_info.file = NULL; |
4af1a041 N |
5670 | spin_unlock(&mddev->lock); |
5671 | fput(f); | |
978f946b | 5672 | } |
c3d9714e | 5673 | mddev->bitmap_info.offset = 0; |
978f946b | 5674 | |
1da177e4 LT |
5675 | export_array(mddev); |
5676 | ||
6177b472 | 5677 | md_clean(mddev); |
efeb53c0 N |
5678 | if (mddev->hold_active == UNTIL_STOP) |
5679 | mddev->hold_active = 0; | |
a4bd82d0 | 5680 | } |
d7603b7e | 5681 | md_new_event(mddev); |
00bcb4ac | 5682 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6e17b027 | 5683 | return 0; |
1da177e4 LT |
5684 | } |
5685 | ||
fdee8ae4 | 5686 | #ifndef MODULE |
fd01b88c | 5687 | static void autorun_array(struct mddev *mddev) |
1da177e4 | 5688 | { |
3cb03002 | 5689 | struct md_rdev *rdev; |
1da177e4 LT |
5690 | int err; |
5691 | ||
a757e64c | 5692 | if (list_empty(&mddev->disks)) |
1da177e4 | 5693 | return; |
1da177e4 LT |
5694 | |
5695 | printk(KERN_INFO "md: running: "); | |
5696 | ||
dafb20fa | 5697 | rdev_for_each(rdev, mddev) { |
1da177e4 LT |
5698 | char b[BDEVNAME_SIZE]; |
5699 | printk("<%s>", bdevname(rdev->bdev,b)); | |
5700 | } | |
5701 | printk("\n"); | |
5702 | ||
d710e138 | 5703 | err = do_md_run(mddev); |
1da177e4 LT |
5704 | if (err) { |
5705 | printk(KERN_WARNING "md: do_md_run() returned %d\n", err); | |
a05b7ea0 | 5706 | do_md_stop(mddev, 0, NULL); |
1da177e4 LT |
5707 | } |
5708 | } | |
5709 | ||
5710 | /* | |
5711 | * lets try to run arrays based on all disks that have arrived | |
5712 | * until now. (those are in pending_raid_disks) | |
5713 | * | |
5714 | * the method: pick the first pending disk, collect all disks with | |
5715 | * the same UUID, remove all from the pending list and put them into | |
5716 | * the 'same_array' list. Then order this list based on superblock | |
5717 | * update time (freshest comes first), kick out 'old' disks and | |
5718 | * compare superblocks. If everything's fine then run it. | |
5719 | * | |
5720 | * If "unit" is allocated, then bump its reference count | |
5721 | */ | |
5722 | static void autorun_devices(int part) | |
5723 | { | |
3cb03002 | 5724 | struct md_rdev *rdev0, *rdev, *tmp; |
fd01b88c | 5725 | struct mddev *mddev; |
1da177e4 LT |
5726 | char b[BDEVNAME_SIZE]; |
5727 | ||
5728 | printk(KERN_INFO "md: autorun ...\n"); | |
5729 | while (!list_empty(&pending_raid_disks)) { | |
e8703fe1 | 5730 | int unit; |
1da177e4 | 5731 | dev_t dev; |
ad01c9e3 | 5732 | LIST_HEAD(candidates); |
1da177e4 | 5733 | rdev0 = list_entry(pending_raid_disks.next, |
3cb03002 | 5734 | struct md_rdev, same_set); |
1da177e4 LT |
5735 | |
5736 | printk(KERN_INFO "md: considering %s ...\n", | |
5737 | bdevname(rdev0->bdev,b)); | |
5738 | INIT_LIST_HEAD(&candidates); | |
159ec1fc | 5739 | rdev_for_each_list(rdev, tmp, &pending_raid_disks) |
1da177e4 LT |
5740 | if (super_90_load(rdev, rdev0, 0) >= 0) { |
5741 | printk(KERN_INFO "md: adding %s ...\n", | |
5742 | bdevname(rdev->bdev,b)); | |
5743 | list_move(&rdev->same_set, &candidates); | |
5744 | } | |
5745 | /* | |
5746 | * now we have a set of devices, with all of them having | |
5747 | * mostly sane superblocks. It's time to allocate the | |
5748 | * mddev. | |
5749 | */ | |
e8703fe1 N |
5750 | if (part) { |
5751 | dev = MKDEV(mdp_major, | |
5752 | rdev0->preferred_minor << MdpMinorShift); | |
5753 | unit = MINOR(dev) >> MdpMinorShift; | |
5754 | } else { | |
5755 | dev = MKDEV(MD_MAJOR, rdev0->preferred_minor); | |
5756 | unit = MINOR(dev); | |
5757 | } | |
5758 | if (rdev0->preferred_minor != unit) { | |
1da177e4 LT |
5759 | printk(KERN_INFO "md: unit number in %s is bad: %d\n", |
5760 | bdevname(rdev0->bdev, b), rdev0->preferred_minor); | |
5761 | break; | |
5762 | } | |
1da177e4 LT |
5763 | |
5764 | md_probe(dev, NULL, NULL); | |
5765 | mddev = mddev_find(dev); | |
9bbbca3a NB |
5766 | if (!mddev || !mddev->gendisk) { |
5767 | if (mddev) | |
5768 | mddev_put(mddev); | |
5769 | printk(KERN_ERR | |
1da177e4 LT |
5770 | "md: cannot allocate memory for md drive.\n"); |
5771 | break; | |
5772 | } | |
f72ffdd6 | 5773 | if (mddev_lock(mddev)) |
1da177e4 LT |
5774 | printk(KERN_WARNING "md: %s locked, cannot run\n", |
5775 | mdname(mddev)); | |
5776 | else if (mddev->raid_disks || mddev->major_version | |
5777 | || !list_empty(&mddev->disks)) { | |
f72ffdd6 | 5778 | printk(KERN_WARNING |
1da177e4 LT |
5779 | "md: %s already running, cannot run %s\n", |
5780 | mdname(mddev), bdevname(rdev0->bdev,b)); | |
5781 | mddev_unlock(mddev); | |
5782 | } else { | |
5783 | printk(KERN_INFO "md: created %s\n", mdname(mddev)); | |
1ec4a939 | 5784 | mddev->persistent = 1; |
159ec1fc | 5785 | rdev_for_each_list(rdev, tmp, &candidates) { |
1da177e4 LT |
5786 | list_del_init(&rdev->same_set); |
5787 | if (bind_rdev_to_array(rdev, mddev)) | |
5788 | export_rdev(rdev); | |
5789 | } | |
5790 | autorun_array(mddev); | |
5791 | mddev_unlock(mddev); | |
5792 | } | |
5793 | /* on success, candidates will be empty, on error | |
5794 | * it won't... | |
5795 | */ | |
159ec1fc | 5796 | rdev_for_each_list(rdev, tmp, &candidates) { |
4b80991c | 5797 | list_del_init(&rdev->same_set); |
1da177e4 | 5798 | export_rdev(rdev); |
4b80991c | 5799 | } |
1da177e4 LT |
5800 | mddev_put(mddev); |
5801 | } | |
5802 | printk(KERN_INFO "md: ... autorun DONE.\n"); | |
5803 | } | |
fdee8ae4 | 5804 | #endif /* !MODULE */ |
1da177e4 | 5805 | |
f72ffdd6 | 5806 | static int get_version(void __user *arg) |
1da177e4 LT |
5807 | { |
5808 | mdu_version_t ver; | |
5809 | ||
5810 | ver.major = MD_MAJOR_VERSION; | |
5811 | ver.minor = MD_MINOR_VERSION; | |
5812 | ver.patchlevel = MD_PATCHLEVEL_VERSION; | |
5813 | ||
5814 | if (copy_to_user(arg, &ver, sizeof(ver))) | |
5815 | return -EFAULT; | |
5816 | ||
5817 | return 0; | |
5818 | } | |
5819 | ||
f72ffdd6 | 5820 | static int get_array_info(struct mddev *mddev, void __user *arg) |
1da177e4 LT |
5821 | { |
5822 | mdu_array_info_t info; | |
a9f326eb | 5823 | int nr,working,insync,failed,spare; |
3cb03002 | 5824 | struct md_rdev *rdev; |
1da177e4 | 5825 | |
1ca69c4b N |
5826 | nr = working = insync = failed = spare = 0; |
5827 | rcu_read_lock(); | |
5828 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 5829 | nr++; |
b2d444d7 | 5830 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
5831 | failed++; |
5832 | else { | |
5833 | working++; | |
b2d444d7 | 5834 | if (test_bit(In_sync, &rdev->flags)) |
f72ffdd6 | 5835 | insync++; |
1da177e4 LT |
5836 | else |
5837 | spare++; | |
5838 | } | |
5839 | } | |
1ca69c4b | 5840 | rcu_read_unlock(); |
1da177e4 LT |
5841 | |
5842 | info.major_version = mddev->major_version; | |
5843 | info.minor_version = mddev->minor_version; | |
5844 | info.patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 5845 | info.ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 5846 | info.level = mddev->level; |
58c0fed4 AN |
5847 | info.size = mddev->dev_sectors / 2; |
5848 | if (info.size != mddev->dev_sectors / 2) /* overflow */ | |
284ae7ca | 5849 | info.size = -1; |
1da177e4 LT |
5850 | info.nr_disks = nr; |
5851 | info.raid_disks = mddev->raid_disks; | |
5852 | info.md_minor = mddev->md_minor; | |
5853 | info.not_persistent= !mddev->persistent; | |
5854 | ||
9ebc6ef1 | 5855 | info.utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
5856 | info.state = 0; |
5857 | if (mddev->in_sync) | |
5858 | info.state = (1<<MD_SB_CLEAN); | |
c3d9714e | 5859 | if (mddev->bitmap && mddev->bitmap_info.offset) |
9bd35920 | 5860 | info.state |= (1<<MD_SB_BITMAP_PRESENT); |
ca8895d9 GR |
5861 | if (mddev_is_clustered(mddev)) |
5862 | info.state |= (1<<MD_SB_CLUSTERED); | |
a9f326eb | 5863 | info.active_disks = insync; |
1da177e4 LT |
5864 | info.working_disks = working; |
5865 | info.failed_disks = failed; | |
5866 | info.spare_disks = spare; | |
5867 | ||
5868 | info.layout = mddev->layout; | |
9d8f0363 | 5869 | info.chunk_size = mddev->chunk_sectors << 9; |
1da177e4 LT |
5870 | |
5871 | if (copy_to_user(arg, &info, sizeof(info))) | |
5872 | return -EFAULT; | |
5873 | ||
5874 | return 0; | |
5875 | } | |
5876 | ||
f72ffdd6 | 5877 | static int get_bitmap_file(struct mddev *mddev, void __user * arg) |
32a7627c N |
5878 | { |
5879 | mdu_bitmap_file_t *file = NULL; /* too big for stack allocation */ | |
f4ad3d38 | 5880 | char *ptr; |
4af1a041 | 5881 | int err; |
32a7627c | 5882 | |
b6878d9e | 5883 | file = kzalloc(sizeof(*file), GFP_NOIO); |
32a7627c | 5884 | if (!file) |
4af1a041 | 5885 | return -ENOMEM; |
32a7627c | 5886 | |
4af1a041 N |
5887 | err = 0; |
5888 | spin_lock(&mddev->lock); | |
25eafe1a BR |
5889 | /* bitmap enabled */ |
5890 | if (mddev->bitmap_info.file) { | |
5891 | ptr = file_path(mddev->bitmap_info.file, file->pathname, | |
5892 | sizeof(file->pathname)); | |
5893 | if (IS_ERR(ptr)) | |
5894 | err = PTR_ERR(ptr); | |
5895 | else | |
5896 | memmove(file->pathname, ptr, | |
5897 | sizeof(file->pathname)-(ptr-file->pathname)); | |
5898 | } | |
4af1a041 | 5899 | spin_unlock(&mddev->lock); |
32a7627c | 5900 | |
4af1a041 N |
5901 | if (err == 0 && |
5902 | copy_to_user(arg, file, sizeof(*file))) | |
32a7627c | 5903 | err = -EFAULT; |
4af1a041 | 5904 | |
32a7627c N |
5905 | kfree(file); |
5906 | return err; | |
5907 | } | |
5908 | ||
f72ffdd6 | 5909 | static int get_disk_info(struct mddev *mddev, void __user * arg) |
1da177e4 LT |
5910 | { |
5911 | mdu_disk_info_t info; | |
3cb03002 | 5912 | struct md_rdev *rdev; |
1da177e4 LT |
5913 | |
5914 | if (copy_from_user(&info, arg, sizeof(info))) | |
5915 | return -EFAULT; | |
5916 | ||
1ca69c4b | 5917 | rcu_read_lock(); |
57d051dc | 5918 | rdev = md_find_rdev_nr_rcu(mddev, info.number); |
1da177e4 LT |
5919 | if (rdev) { |
5920 | info.major = MAJOR(rdev->bdev->bd_dev); | |
5921 | info.minor = MINOR(rdev->bdev->bd_dev); | |
5922 | info.raid_disk = rdev->raid_disk; | |
5923 | info.state = 0; | |
b2d444d7 | 5924 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 5925 | info.state |= (1<<MD_DISK_FAULTY); |
b2d444d7 | 5926 | else if (test_bit(In_sync, &rdev->flags)) { |
1da177e4 LT |
5927 | info.state |= (1<<MD_DISK_ACTIVE); |
5928 | info.state |= (1<<MD_DISK_SYNC); | |
5929 | } | |
9efdca16 | 5930 | if (test_bit(Journal, &rdev->flags)) |
bac624f3 | 5931 | info.state |= (1<<MD_DISK_JOURNAL); |
8ddf9efe N |
5932 | if (test_bit(WriteMostly, &rdev->flags)) |
5933 | info.state |= (1<<MD_DISK_WRITEMOSTLY); | |
1da177e4 LT |
5934 | } else { |
5935 | info.major = info.minor = 0; | |
5936 | info.raid_disk = -1; | |
5937 | info.state = (1<<MD_DISK_REMOVED); | |
5938 | } | |
1ca69c4b | 5939 | rcu_read_unlock(); |
1da177e4 LT |
5940 | |
5941 | if (copy_to_user(arg, &info, sizeof(info))) | |
5942 | return -EFAULT; | |
5943 | ||
5944 | return 0; | |
5945 | } | |
5946 | ||
f72ffdd6 | 5947 | static int add_new_disk(struct mddev *mddev, mdu_disk_info_t *info) |
1da177e4 LT |
5948 | { |
5949 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 5950 | struct md_rdev *rdev; |
1da177e4 LT |
5951 | dev_t dev = MKDEV(info->major,info->minor); |
5952 | ||
1aee41f6 GR |
5953 | if (mddev_is_clustered(mddev) && |
5954 | !(info->state & ((1 << MD_DISK_CLUSTER_ADD) | (1 << MD_DISK_CANDIDATE)))) { | |
fa8259da | 5955 | pr_err("%s: Cannot add to clustered mddev.\n", |
1aee41f6 GR |
5956 | mdname(mddev)); |
5957 | return -EINVAL; | |
5958 | } | |
5959 | ||
1da177e4 LT |
5960 | if (info->major != MAJOR(dev) || info->minor != MINOR(dev)) |
5961 | return -EOVERFLOW; | |
5962 | ||
5963 | if (!mddev->raid_disks) { | |
5964 | int err; | |
5965 | /* expecting a device which has a superblock */ | |
5966 | rdev = md_import_device(dev, mddev->major_version, mddev->minor_version); | |
5967 | if (IS_ERR(rdev)) { | |
f72ffdd6 | 5968 | printk(KERN_WARNING |
1da177e4 LT |
5969 | "md: md_import_device returned %ld\n", |
5970 | PTR_ERR(rdev)); | |
5971 | return PTR_ERR(rdev); | |
5972 | } | |
5973 | if (!list_empty(&mddev->disks)) { | |
3cb03002 N |
5974 | struct md_rdev *rdev0 |
5975 | = list_entry(mddev->disks.next, | |
5976 | struct md_rdev, same_set); | |
a9f326eb | 5977 | err = super_types[mddev->major_version] |
1da177e4 LT |
5978 | .load_super(rdev, rdev0, mddev->minor_version); |
5979 | if (err < 0) { | |
f72ffdd6 | 5980 | printk(KERN_WARNING |
1da177e4 | 5981 | "md: %s has different UUID to %s\n", |
f72ffdd6 | 5982 | bdevname(rdev->bdev,b), |
1da177e4 LT |
5983 | bdevname(rdev0->bdev,b2)); |
5984 | export_rdev(rdev); | |
5985 | return -EINVAL; | |
5986 | } | |
5987 | } | |
5988 | err = bind_rdev_to_array(rdev, mddev); | |
5989 | if (err) | |
5990 | export_rdev(rdev); | |
5991 | return err; | |
5992 | } | |
5993 | ||
5994 | /* | |
5995 | * add_new_disk can be used once the array is assembled | |
5996 | * to add "hot spares". They must already have a superblock | |
5997 | * written | |
5998 | */ | |
5999 | if (mddev->pers) { | |
6000 | int err; | |
6001 | if (!mddev->pers->hot_add_disk) { | |
f72ffdd6 | 6002 | printk(KERN_WARNING |
1da177e4 LT |
6003 | "%s: personality does not support diskops!\n", |
6004 | mdname(mddev)); | |
6005 | return -EINVAL; | |
6006 | } | |
7b1e35f6 N |
6007 | if (mddev->persistent) |
6008 | rdev = md_import_device(dev, mddev->major_version, | |
6009 | mddev->minor_version); | |
6010 | else | |
6011 | rdev = md_import_device(dev, -1, -1); | |
1da177e4 | 6012 | if (IS_ERR(rdev)) { |
f72ffdd6 | 6013 | printk(KERN_WARNING |
1da177e4 LT |
6014 | "md: md_import_device returned %ld\n", |
6015 | PTR_ERR(rdev)); | |
6016 | return PTR_ERR(rdev); | |
6017 | } | |
1a855a06 | 6018 | /* set saved_raid_disk if appropriate */ |
41158c7e N |
6019 | if (!mddev->persistent) { |
6020 | if (info->state & (1<<MD_DISK_SYNC) && | |
bf572541 | 6021 | info->raid_disk < mddev->raid_disks) { |
41158c7e | 6022 | rdev->raid_disk = info->raid_disk; |
bf572541 | 6023 | set_bit(In_sync, &rdev->flags); |
8313b8e5 | 6024 | clear_bit(Bitmap_sync, &rdev->flags); |
bf572541 | 6025 | } else |
41158c7e | 6026 | rdev->raid_disk = -1; |
f466722c | 6027 | rdev->saved_raid_disk = rdev->raid_disk; |
41158c7e N |
6028 | } else |
6029 | super_types[mddev->major_version]. | |
6030 | validate_super(mddev, rdev); | |
bedd86b7 | 6031 | if ((info->state & (1<<MD_DISK_SYNC)) && |
f4563091 | 6032 | rdev->raid_disk != info->raid_disk) { |
bedd86b7 N |
6033 | /* This was a hot-add request, but events doesn't |
6034 | * match, so reject it. | |
6035 | */ | |
6036 | export_rdev(rdev); | |
6037 | return -EINVAL; | |
6038 | } | |
6039 | ||
b2d444d7 | 6040 | clear_bit(In_sync, &rdev->flags); /* just to be sure */ |
8ddf9efe N |
6041 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6042 | set_bit(WriteMostly, &rdev->flags); | |
575a80fa N |
6043 | else |
6044 | clear_bit(WriteMostly, &rdev->flags); | |
8ddf9efe | 6045 | |
f6b6ec5c SL |
6046 | if (info->state & (1<<MD_DISK_JOURNAL)) { |
6047 | struct md_rdev *rdev2; | |
6048 | bool has_journal = false; | |
6049 | ||
6050 | /* make sure no existing journal disk */ | |
6051 | rdev_for_each(rdev2, mddev) { | |
6052 | if (test_bit(Journal, &rdev2->flags)) { | |
6053 | has_journal = true; | |
6054 | break; | |
6055 | } | |
6056 | } | |
6057 | if (has_journal) { | |
6058 | export_rdev(rdev); | |
6059 | return -EBUSY; | |
6060 | } | |
bac624f3 | 6061 | set_bit(Journal, &rdev->flags); |
f6b6ec5c | 6062 | } |
1aee41f6 GR |
6063 | /* |
6064 | * check whether the device shows up in other nodes | |
6065 | */ | |
6066 | if (mddev_is_clustered(mddev)) { | |
dbb64f86 | 6067 | if (info->state & (1 << MD_DISK_CANDIDATE)) |
1aee41f6 | 6068 | set_bit(Candidate, &rdev->flags); |
dbb64f86 | 6069 | else if (info->state & (1 << MD_DISK_CLUSTER_ADD)) { |
1aee41f6 | 6070 | /* --add initiated by this node */ |
dbb64f86 | 6071 | err = md_cluster_ops->add_new_disk(mddev, rdev); |
1aee41f6 | 6072 | if (err) { |
1aee41f6 GR |
6073 | export_rdev(rdev); |
6074 | return err; | |
6075 | } | |
6076 | } | |
6077 | } | |
6078 | ||
1da177e4 LT |
6079 | rdev->raid_disk = -1; |
6080 | err = bind_rdev_to_array(rdev, mddev); | |
dbb64f86 | 6081 | |
1da177e4 LT |
6082 | if (err) |
6083 | export_rdev(rdev); | |
dbb64f86 GR |
6084 | |
6085 | if (mddev_is_clustered(mddev)) { | |
6086 | if (info->state & (1 << MD_DISK_CANDIDATE)) | |
6087 | md_cluster_ops->new_disk_ack(mddev, (err == 0)); | |
6088 | else { | |
6089 | if (err) | |
6090 | md_cluster_ops->add_new_disk_cancel(mddev); | |
6091 | else | |
6092 | err = add_bound_rdev(rdev); | |
6093 | } | |
6094 | ||
6095 | } else if (!err) | |
a6da4ef8 | 6096 | err = add_bound_rdev(rdev); |
dbb64f86 | 6097 | |
1da177e4 LT |
6098 | return err; |
6099 | } | |
6100 | ||
6101 | /* otherwise, add_new_disk is only allowed | |
6102 | * for major_version==0 superblocks | |
6103 | */ | |
6104 | if (mddev->major_version != 0) { | |
6105 | printk(KERN_WARNING "%s: ADD_NEW_DISK not supported\n", | |
6106 | mdname(mddev)); | |
6107 | return -EINVAL; | |
6108 | } | |
6109 | ||
6110 | if (!(info->state & (1<<MD_DISK_FAULTY))) { | |
6111 | int err; | |
d710e138 | 6112 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6113 | if (IS_ERR(rdev)) { |
f72ffdd6 | 6114 | printk(KERN_WARNING |
1da177e4 LT |
6115 | "md: error, md_import_device() returned %ld\n", |
6116 | PTR_ERR(rdev)); | |
6117 | return PTR_ERR(rdev); | |
6118 | } | |
6119 | rdev->desc_nr = info->number; | |
6120 | if (info->raid_disk < mddev->raid_disks) | |
6121 | rdev->raid_disk = info->raid_disk; | |
6122 | else | |
6123 | rdev->raid_disk = -1; | |
6124 | ||
1da177e4 | 6125 | if (rdev->raid_disk < mddev->raid_disks) |
b2d444d7 N |
6126 | if (info->state & (1<<MD_DISK_SYNC)) |
6127 | set_bit(In_sync, &rdev->flags); | |
1da177e4 | 6128 | |
8ddf9efe N |
6129 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6130 | set_bit(WriteMostly, &rdev->flags); | |
6131 | ||
1da177e4 LT |
6132 | if (!mddev->persistent) { |
6133 | printk(KERN_INFO "md: nonpersistent superblock ...\n"); | |
77304d2a MS |
6134 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
6135 | } else | |
57b2caa3 | 6136 | rdev->sb_start = calc_dev_sboffset(rdev); |
8190e754 | 6137 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6138 | |
2bf071bf N |
6139 | err = bind_rdev_to_array(rdev, mddev); |
6140 | if (err) { | |
6141 | export_rdev(rdev); | |
6142 | return err; | |
6143 | } | |
1da177e4 LT |
6144 | } |
6145 | ||
6146 | return 0; | |
6147 | } | |
6148 | ||
f72ffdd6 | 6149 | static int hot_remove_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6150 | { |
6151 | char b[BDEVNAME_SIZE]; | |
3cb03002 | 6152 | struct md_rdev *rdev; |
1da177e4 | 6153 | |
1da177e4 LT |
6154 | rdev = find_rdev(mddev, dev); |
6155 | if (!rdev) | |
6156 | return -ENXIO; | |
6157 | ||
2910ff17 GR |
6158 | if (rdev->raid_disk < 0) |
6159 | goto kick_rdev; | |
293467aa | 6160 | |
3ea8929d N |
6161 | clear_bit(Blocked, &rdev->flags); |
6162 | remove_and_add_spares(mddev, rdev); | |
6163 | ||
1da177e4 LT |
6164 | if (rdev->raid_disk >= 0) |
6165 | goto busy; | |
6166 | ||
2910ff17 | 6167 | kick_rdev: |
54a88392 | 6168 | if (mddev_is_clustered(mddev)) |
88bcfef7 GR |
6169 | md_cluster_ops->remove_disk(mddev, rdev); |
6170 | ||
fb56dfef | 6171 | md_kick_rdev_from_array(rdev); |
850b2b42 | 6172 | md_update_sb(mddev, 1); |
d7603b7e | 6173 | md_new_event(mddev); |
1da177e4 LT |
6174 | |
6175 | return 0; | |
6176 | busy: | |
fdefa4d8 | 6177 | printk(KERN_WARNING "md: cannot remove active disk %s from %s ...\n", |
1da177e4 LT |
6178 | bdevname(rdev->bdev,b), mdname(mddev)); |
6179 | return -EBUSY; | |
6180 | } | |
6181 | ||
f72ffdd6 | 6182 | static int hot_add_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6183 | { |
6184 | char b[BDEVNAME_SIZE]; | |
6185 | int err; | |
3cb03002 | 6186 | struct md_rdev *rdev; |
1da177e4 LT |
6187 | |
6188 | if (!mddev->pers) | |
6189 | return -ENODEV; | |
6190 | ||
6191 | if (mddev->major_version != 0) { | |
6192 | printk(KERN_WARNING "%s: HOT_ADD may only be used with" | |
6193 | " version-0 superblocks.\n", | |
6194 | mdname(mddev)); | |
6195 | return -EINVAL; | |
6196 | } | |
6197 | if (!mddev->pers->hot_add_disk) { | |
f72ffdd6 | 6198 | printk(KERN_WARNING |
1da177e4 LT |
6199 | "%s: personality does not support diskops!\n", |
6200 | mdname(mddev)); | |
6201 | return -EINVAL; | |
6202 | } | |
6203 | ||
d710e138 | 6204 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6205 | if (IS_ERR(rdev)) { |
f72ffdd6 | 6206 | printk(KERN_WARNING |
1da177e4 LT |
6207 | "md: error, md_import_device() returned %ld\n", |
6208 | PTR_ERR(rdev)); | |
6209 | return -EINVAL; | |
6210 | } | |
6211 | ||
6212 | if (mddev->persistent) | |
57b2caa3 | 6213 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 6214 | else |
77304d2a | 6215 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
1da177e4 | 6216 | |
8190e754 | 6217 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6218 | |
b2d444d7 | 6219 | if (test_bit(Faulty, &rdev->flags)) { |
f72ffdd6 | 6220 | printk(KERN_WARNING |
1da177e4 LT |
6221 | "md: can not hot-add faulty %s disk to %s!\n", |
6222 | bdevname(rdev->bdev,b), mdname(mddev)); | |
6223 | err = -EINVAL; | |
6224 | goto abort_export; | |
6225 | } | |
293467aa | 6226 | |
b2d444d7 | 6227 | clear_bit(In_sync, &rdev->flags); |
1da177e4 | 6228 | rdev->desc_nr = -1; |
5842730d | 6229 | rdev->saved_raid_disk = -1; |
2bf071bf N |
6230 | err = bind_rdev_to_array(rdev, mddev); |
6231 | if (err) | |
2aa82191 | 6232 | goto abort_export; |
1da177e4 LT |
6233 | |
6234 | /* | |
6235 | * The rest should better be atomic, we can have disk failures | |
6236 | * noticed in interrupt contexts ... | |
6237 | */ | |
6238 | ||
1da177e4 LT |
6239 | rdev->raid_disk = -1; |
6240 | ||
850b2b42 | 6241 | md_update_sb(mddev, 1); |
1da177e4 LT |
6242 | /* |
6243 | * Kick recovery, maybe this spare has to be added to the | |
6244 | * array immediately. | |
6245 | */ | |
6246 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6247 | md_wakeup_thread(mddev->thread); | |
d7603b7e | 6248 | md_new_event(mddev); |
1da177e4 LT |
6249 | return 0; |
6250 | ||
1da177e4 LT |
6251 | abort_export: |
6252 | export_rdev(rdev); | |
6253 | return err; | |
6254 | } | |
6255 | ||
fd01b88c | 6256 | static int set_bitmap_file(struct mddev *mddev, int fd) |
32a7627c | 6257 | { |
035328c2 | 6258 | int err = 0; |
32a7627c | 6259 | |
36fa3063 | 6260 | if (mddev->pers) { |
d66b1b39 | 6261 | if (!mddev->pers->quiesce || !mddev->thread) |
36fa3063 N |
6262 | return -EBUSY; |
6263 | if (mddev->recovery || mddev->sync_thread) | |
6264 | return -EBUSY; | |
6265 | /* we should be able to change the bitmap.. */ | |
6266 | } | |
32a7627c | 6267 | |
36fa3063 | 6268 | if (fd >= 0) { |
035328c2 | 6269 | struct inode *inode; |
1e594bb2 N |
6270 | struct file *f; |
6271 | ||
6272 | if (mddev->bitmap || mddev->bitmap_info.file) | |
36fa3063 | 6273 | return -EEXIST; /* cannot add when bitmap is present */ |
1e594bb2 | 6274 | f = fget(fd); |
32a7627c | 6275 | |
1e594bb2 | 6276 | if (f == NULL) { |
36fa3063 N |
6277 | printk(KERN_ERR "%s: error: failed to get bitmap file\n", |
6278 | mdname(mddev)); | |
6279 | return -EBADF; | |
6280 | } | |
6281 | ||
1e594bb2 | 6282 | inode = f->f_mapping->host; |
035328c2 N |
6283 | if (!S_ISREG(inode->i_mode)) { |
6284 | printk(KERN_ERR "%s: error: bitmap file must be a regular file\n", | |
6285 | mdname(mddev)); | |
6286 | err = -EBADF; | |
1e594bb2 | 6287 | } else if (!(f->f_mode & FMODE_WRITE)) { |
035328c2 N |
6288 | printk(KERN_ERR "%s: error: bitmap file must open for write\n", |
6289 | mdname(mddev)); | |
6290 | err = -EBADF; | |
6291 | } else if (atomic_read(&inode->i_writecount) != 1) { | |
36fa3063 N |
6292 | printk(KERN_ERR "%s: error: bitmap file is already in use\n", |
6293 | mdname(mddev)); | |
035328c2 N |
6294 | err = -EBUSY; |
6295 | } | |
6296 | if (err) { | |
1e594bb2 | 6297 | fput(f); |
36fa3063 N |
6298 | return err; |
6299 | } | |
1e594bb2 | 6300 | mddev->bitmap_info.file = f; |
c3d9714e | 6301 | mddev->bitmap_info.offset = 0; /* file overrides offset */ |
36fa3063 N |
6302 | } else if (mddev->bitmap == NULL) |
6303 | return -ENOENT; /* cannot remove what isn't there */ | |
6304 | err = 0; | |
6305 | if (mddev->pers) { | |
6306 | mddev->pers->quiesce(mddev, 1); | |
69e51b44 | 6307 | if (fd >= 0) { |
f9209a32 GR |
6308 | struct bitmap *bitmap; |
6309 | ||
6310 | bitmap = bitmap_create(mddev, -1); | |
6311 | if (!IS_ERR(bitmap)) { | |
6312 | mddev->bitmap = bitmap; | |
69e51b44 | 6313 | err = bitmap_load(mddev); |
ba599aca N |
6314 | } else |
6315 | err = PTR_ERR(bitmap); | |
69e51b44 | 6316 | } |
d7375ab3 | 6317 | if (fd < 0 || err) { |
36fa3063 | 6318 | bitmap_destroy(mddev); |
d7375ab3 N |
6319 | fd = -1; /* make sure to put the file */ |
6320 | } | |
36fa3063 | 6321 | mddev->pers->quiesce(mddev, 0); |
d7375ab3 N |
6322 | } |
6323 | if (fd < 0) { | |
4af1a041 N |
6324 | struct file *f = mddev->bitmap_info.file; |
6325 | if (f) { | |
6326 | spin_lock(&mddev->lock); | |
6327 | mddev->bitmap_info.file = NULL; | |
6328 | spin_unlock(&mddev->lock); | |
6329 | fput(f); | |
6330 | } | |
36fa3063 N |
6331 | } |
6332 | ||
32a7627c N |
6333 | return err; |
6334 | } | |
6335 | ||
1da177e4 LT |
6336 | /* |
6337 | * set_array_info is used two different ways | |
6338 | * The original usage is when creating a new array. | |
6339 | * In this usage, raid_disks is > 0 and it together with | |
6340 | * level, size, not_persistent,layout,chunksize determine the | |
6341 | * shape of the array. | |
6342 | * This will always create an array with a type-0.90.0 superblock. | |
6343 | * The newer usage is when assembling an array. | |
6344 | * In this case raid_disks will be 0, and the major_version field is | |
6345 | * use to determine which style super-blocks are to be found on the devices. | |
6346 | * The minor and patch _version numbers are also kept incase the | |
6347 | * super_block handler wishes to interpret them. | |
6348 | */ | |
f72ffdd6 | 6349 | static int set_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
6350 | { |
6351 | ||
6352 | if (info->raid_disks == 0) { | |
6353 | /* just setting version number for superblock loading */ | |
6354 | if (info->major_version < 0 || | |
50511da3 | 6355 | info->major_version >= ARRAY_SIZE(super_types) || |
1da177e4 LT |
6356 | super_types[info->major_version].name == NULL) { |
6357 | /* maybe try to auto-load a module? */ | |
f72ffdd6 | 6358 | printk(KERN_INFO |
1da177e4 LT |
6359 | "md: superblock version %d not known\n", |
6360 | info->major_version); | |
6361 | return -EINVAL; | |
6362 | } | |
6363 | mddev->major_version = info->major_version; | |
6364 | mddev->minor_version = info->minor_version; | |
6365 | mddev->patch_version = info->patch_version; | |
3f9d7b0d | 6366 | mddev->persistent = !info->not_persistent; |
cbd19983 N |
6367 | /* ensure mddev_put doesn't delete this now that there |
6368 | * is some minimal configuration. | |
6369 | */ | |
9ebc6ef1 | 6370 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
6371 | return 0; |
6372 | } | |
6373 | mddev->major_version = MD_MAJOR_VERSION; | |
6374 | mddev->minor_version = MD_MINOR_VERSION; | |
6375 | mddev->patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6376 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
6377 | |
6378 | mddev->level = info->level; | |
17115e03 | 6379 | mddev->clevel[0] = 0; |
58c0fed4 | 6380 | mddev->dev_sectors = 2 * (sector_t)info->size; |
1da177e4 LT |
6381 | mddev->raid_disks = info->raid_disks; |
6382 | /* don't set md_minor, it is determined by which /dev/md* was | |
6383 | * openned | |
6384 | */ | |
6385 | if (info->state & (1<<MD_SB_CLEAN)) | |
6386 | mddev->recovery_cp = MaxSector; | |
6387 | else | |
6388 | mddev->recovery_cp = 0; | |
6389 | mddev->persistent = ! info->not_persistent; | |
e691063a | 6390 | mddev->external = 0; |
1da177e4 LT |
6391 | |
6392 | mddev->layout = info->layout; | |
9d8f0363 | 6393 | mddev->chunk_sectors = info->chunk_size >> 9; |
1da177e4 LT |
6394 | |
6395 | mddev->max_disks = MD_SB_DISKS; | |
6396 | ||
e691063a N |
6397 | if (mddev->persistent) |
6398 | mddev->flags = 0; | |
850b2b42 | 6399 | set_bit(MD_CHANGE_DEVS, &mddev->flags); |
1da177e4 | 6400 | |
c3d9714e | 6401 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 6402 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
c3d9714e | 6403 | mddev->bitmap_info.offset = 0; |
b2a2703c | 6404 | |
f6705578 N |
6405 | mddev->reshape_position = MaxSector; |
6406 | ||
1da177e4 LT |
6407 | /* |
6408 | * Generate a 128 bit UUID | |
6409 | */ | |
6410 | get_random_bytes(mddev->uuid, 16); | |
6411 | ||
f6705578 | 6412 | mddev->new_level = mddev->level; |
664e7c41 | 6413 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
6414 | mddev->new_layout = mddev->layout; |
6415 | mddev->delta_disks = 0; | |
2c810cdd | 6416 | mddev->reshape_backwards = 0; |
f6705578 | 6417 | |
1da177e4 LT |
6418 | return 0; |
6419 | } | |
6420 | ||
fd01b88c | 6421 | void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors) |
1f403624 | 6422 | { |
b522adcd DW |
6423 | WARN(!mddev_is_locked(mddev), "%s: unlocked mddev!\n", __func__); |
6424 | ||
6425 | if (mddev->external_size) | |
6426 | return; | |
6427 | ||
1f403624 DW |
6428 | mddev->array_sectors = array_sectors; |
6429 | } | |
6430 | EXPORT_SYMBOL(md_set_array_sectors); | |
6431 | ||
fd01b88c | 6432 | static int update_size(struct mddev *mddev, sector_t num_sectors) |
a35b0d69 | 6433 | { |
3cb03002 | 6434 | struct md_rdev *rdev; |
a35b0d69 | 6435 | int rv; |
d71f9f88 | 6436 | int fit = (num_sectors == 0); |
a35b0d69 N |
6437 | |
6438 | if (mddev->pers->resize == NULL) | |
6439 | return -EINVAL; | |
d71f9f88 AN |
6440 | /* The "num_sectors" is the number of sectors of each device that |
6441 | * is used. This can only make sense for arrays with redundancy. | |
6442 | * linear and raid0 always use whatever space is available. We can only | |
6443 | * consider changing this number if no resync or reconstruction is | |
6444 | * happening, and if the new size is acceptable. It must fit before the | |
0f420358 | 6445 | * sb_start or, if that is <data_offset, it must fit before the size |
d71f9f88 AN |
6446 | * of each device. If num_sectors is zero, we find the largest size |
6447 | * that fits. | |
a35b0d69 | 6448 | */ |
f851b60d N |
6449 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
6450 | mddev->sync_thread) | |
a35b0d69 | 6451 | return -EBUSY; |
bd8839e0 N |
6452 | if (mddev->ro) |
6453 | return -EROFS; | |
a4a6125a | 6454 | |
dafb20fa | 6455 | rdev_for_each(rdev, mddev) { |
dd8ac336 | 6456 | sector_t avail = rdev->sectors; |
01ab5662 | 6457 | |
d71f9f88 AN |
6458 | if (fit && (num_sectors == 0 || num_sectors > avail)) |
6459 | num_sectors = avail; | |
6460 | if (avail < num_sectors) | |
a35b0d69 N |
6461 | return -ENOSPC; |
6462 | } | |
d71f9f88 | 6463 | rv = mddev->pers->resize(mddev, num_sectors); |
449aad3e N |
6464 | if (!rv) |
6465 | revalidate_disk(mddev->gendisk); | |
a35b0d69 N |
6466 | return rv; |
6467 | } | |
6468 | ||
fd01b88c | 6469 | static int update_raid_disks(struct mddev *mddev, int raid_disks) |
da943b99 N |
6470 | { |
6471 | int rv; | |
c6563a8c | 6472 | struct md_rdev *rdev; |
da943b99 | 6473 | /* change the number of raid disks */ |
63c70c4f | 6474 | if (mddev->pers->check_reshape == NULL) |
da943b99 | 6475 | return -EINVAL; |
bd8839e0 N |
6476 | if (mddev->ro) |
6477 | return -EROFS; | |
da943b99 | 6478 | if (raid_disks <= 0 || |
233fca36 | 6479 | (mddev->max_disks && raid_disks >= mddev->max_disks)) |
da943b99 | 6480 | return -EINVAL; |
f851b60d N |
6481 | if (mddev->sync_thread || |
6482 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || | |
6483 | mddev->reshape_position != MaxSector) | |
da943b99 | 6484 | return -EBUSY; |
c6563a8c N |
6485 | |
6486 | rdev_for_each(rdev, mddev) { | |
6487 | if (mddev->raid_disks < raid_disks && | |
6488 | rdev->data_offset < rdev->new_data_offset) | |
6489 | return -EINVAL; | |
6490 | if (mddev->raid_disks > raid_disks && | |
6491 | rdev->data_offset > rdev->new_data_offset) | |
6492 | return -EINVAL; | |
6493 | } | |
6494 | ||
63c70c4f | 6495 | mddev->delta_disks = raid_disks - mddev->raid_disks; |
2c810cdd N |
6496 | if (mddev->delta_disks < 0) |
6497 | mddev->reshape_backwards = 1; | |
6498 | else if (mddev->delta_disks > 0) | |
6499 | mddev->reshape_backwards = 0; | |
63c70c4f N |
6500 | |
6501 | rv = mddev->pers->check_reshape(mddev); | |
2c810cdd | 6502 | if (rv < 0) { |
de171cb9 | 6503 | mddev->delta_disks = 0; |
2c810cdd N |
6504 | mddev->reshape_backwards = 0; |
6505 | } | |
da943b99 N |
6506 | return rv; |
6507 | } | |
6508 | ||
1da177e4 LT |
6509 | /* |
6510 | * update_array_info is used to change the configuration of an | |
6511 | * on-line array. | |
6512 | * The version, ctime,level,size,raid_disks,not_persistent, layout,chunk_size | |
6513 | * fields in the info are checked against the array. | |
6514 | * Any differences that cannot be handled will cause an error. | |
6515 | * Normally, only one change can be managed at a time. | |
6516 | */ | |
fd01b88c | 6517 | static int update_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
6518 | { |
6519 | int rv = 0; | |
6520 | int cnt = 0; | |
36fa3063 N |
6521 | int state = 0; |
6522 | ||
6523 | /* calculate expected state,ignoring low bits */ | |
c3d9714e | 6524 | if (mddev->bitmap && mddev->bitmap_info.offset) |
36fa3063 | 6525 | state |= (1 << MD_SB_BITMAP_PRESENT); |
1da177e4 LT |
6526 | |
6527 | if (mddev->major_version != info->major_version || | |
6528 | mddev->minor_version != info->minor_version || | |
6529 | /* mddev->patch_version != info->patch_version || */ | |
6530 | mddev->ctime != info->ctime || | |
6531 | mddev->level != info->level || | |
6532 | /* mddev->layout != info->layout || */ | |
4e023612 | 6533 | mddev->persistent != !info->not_persistent || |
9d8f0363 | 6534 | mddev->chunk_sectors != info->chunk_size >> 9 || |
36fa3063 N |
6535 | /* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */ |
6536 | ((state^info->state) & 0xfffffe00) | |
6537 | ) | |
1da177e4 LT |
6538 | return -EINVAL; |
6539 | /* Check there is only one change */ | |
58c0fed4 AN |
6540 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
6541 | cnt++; | |
6542 | if (mddev->raid_disks != info->raid_disks) | |
6543 | cnt++; | |
6544 | if (mddev->layout != info->layout) | |
6545 | cnt++; | |
6546 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) | |
6547 | cnt++; | |
6548 | if (cnt == 0) | |
6549 | return 0; | |
6550 | if (cnt > 1) | |
6551 | return -EINVAL; | |
1da177e4 LT |
6552 | |
6553 | if (mddev->layout != info->layout) { | |
6554 | /* Change layout | |
6555 | * we don't need to do anything at the md level, the | |
6556 | * personality will take care of it all. | |
6557 | */ | |
50ac168a | 6558 | if (mddev->pers->check_reshape == NULL) |
1da177e4 | 6559 | return -EINVAL; |
597a711b N |
6560 | else { |
6561 | mddev->new_layout = info->layout; | |
50ac168a | 6562 | rv = mddev->pers->check_reshape(mddev); |
597a711b N |
6563 | if (rv) |
6564 | mddev->new_layout = mddev->layout; | |
6565 | return rv; | |
6566 | } | |
1da177e4 | 6567 | } |
58c0fed4 | 6568 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
d71f9f88 | 6569 | rv = update_size(mddev, (sector_t)info->size * 2); |
a35b0d69 | 6570 | |
da943b99 N |
6571 | if (mddev->raid_disks != info->raid_disks) |
6572 | rv = update_raid_disks(mddev, info->raid_disks); | |
6573 | ||
36fa3063 | 6574 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) { |
293467aa GR |
6575 | if (mddev->pers->quiesce == NULL || mddev->thread == NULL) { |
6576 | rv = -EINVAL; | |
6577 | goto err; | |
6578 | } | |
6579 | if (mddev->recovery || mddev->sync_thread) { | |
6580 | rv = -EBUSY; | |
6581 | goto err; | |
6582 | } | |
36fa3063 | 6583 | if (info->state & (1<<MD_SB_BITMAP_PRESENT)) { |
f9209a32 | 6584 | struct bitmap *bitmap; |
36fa3063 | 6585 | /* add the bitmap */ |
293467aa GR |
6586 | if (mddev->bitmap) { |
6587 | rv = -EEXIST; | |
6588 | goto err; | |
6589 | } | |
6590 | if (mddev->bitmap_info.default_offset == 0) { | |
6591 | rv = -EINVAL; | |
6592 | goto err; | |
6593 | } | |
c3d9714e N |
6594 | mddev->bitmap_info.offset = |
6595 | mddev->bitmap_info.default_offset; | |
6409bb05 N |
6596 | mddev->bitmap_info.space = |
6597 | mddev->bitmap_info.default_space; | |
36fa3063 | 6598 | mddev->pers->quiesce(mddev, 1); |
f9209a32 GR |
6599 | bitmap = bitmap_create(mddev, -1); |
6600 | if (!IS_ERR(bitmap)) { | |
6601 | mddev->bitmap = bitmap; | |
69e51b44 | 6602 | rv = bitmap_load(mddev); |
ba599aca N |
6603 | } else |
6604 | rv = PTR_ERR(bitmap); | |
36fa3063 N |
6605 | if (rv) |
6606 | bitmap_destroy(mddev); | |
6607 | mddev->pers->quiesce(mddev, 0); | |
6608 | } else { | |
6609 | /* remove the bitmap */ | |
293467aa GR |
6610 | if (!mddev->bitmap) { |
6611 | rv = -ENOENT; | |
6612 | goto err; | |
6613 | } | |
6614 | if (mddev->bitmap->storage.file) { | |
6615 | rv = -EINVAL; | |
6616 | goto err; | |
6617 | } | |
f6a2dc64 GJ |
6618 | if (mddev->bitmap_info.nodes) { |
6619 | /* hold PW on all the bitmap lock */ | |
6620 | if (md_cluster_ops->lock_all_bitmaps(mddev) <= 0) { | |
6621 | printk("md: can't change bitmap to none since the" | |
6622 | " array is in use by more than one node\n"); | |
6623 | rv = -EPERM; | |
6624 | md_cluster_ops->unlock_all_bitmaps(mddev); | |
6625 | goto err; | |
6626 | } | |
6627 | ||
6628 | mddev->bitmap_info.nodes = 0; | |
6629 | md_cluster_ops->leave(mddev); | |
6630 | } | |
36fa3063 N |
6631 | mddev->pers->quiesce(mddev, 1); |
6632 | bitmap_destroy(mddev); | |
6633 | mddev->pers->quiesce(mddev, 0); | |
c3d9714e | 6634 | mddev->bitmap_info.offset = 0; |
36fa3063 N |
6635 | } |
6636 | } | |
850b2b42 | 6637 | md_update_sb(mddev, 1); |
293467aa GR |
6638 | return rv; |
6639 | err: | |
1da177e4 LT |
6640 | return rv; |
6641 | } | |
6642 | ||
fd01b88c | 6643 | static int set_disk_faulty(struct mddev *mddev, dev_t dev) |
1da177e4 | 6644 | { |
3cb03002 | 6645 | struct md_rdev *rdev; |
1ca69c4b | 6646 | int err = 0; |
1da177e4 LT |
6647 | |
6648 | if (mddev->pers == NULL) | |
6649 | return -ENODEV; | |
6650 | ||
1ca69c4b N |
6651 | rcu_read_lock(); |
6652 | rdev = find_rdev_rcu(mddev, dev); | |
1da177e4 | 6653 | if (!rdev) |
1ca69c4b N |
6654 | err = -ENODEV; |
6655 | else { | |
6656 | md_error(mddev, rdev); | |
6657 | if (!test_bit(Faulty, &rdev->flags)) | |
6658 | err = -EBUSY; | |
6659 | } | |
6660 | rcu_read_unlock(); | |
6661 | return err; | |
1da177e4 LT |
6662 | } |
6663 | ||
2f9618ce AN |
6664 | /* |
6665 | * We have a problem here : there is no easy way to give a CHS | |
6666 | * virtual geometry. We currently pretend that we have a 2 heads | |
6667 | * 4 sectors (with a BIG number of cylinders...). This drives | |
6668 | * dosfs just mad... ;-) | |
6669 | */ | |
a885c8c4 CH |
6670 | static int md_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
6671 | { | |
fd01b88c | 6672 | struct mddev *mddev = bdev->bd_disk->private_data; |
a885c8c4 CH |
6673 | |
6674 | geo->heads = 2; | |
6675 | geo->sectors = 4; | |
49ce6cea | 6676 | geo->cylinders = mddev->array_sectors / 8; |
a885c8c4 CH |
6677 | return 0; |
6678 | } | |
6679 | ||
cb335f88 NS |
6680 | static inline bool md_ioctl_valid(unsigned int cmd) |
6681 | { | |
6682 | switch (cmd) { | |
6683 | case ADD_NEW_DISK: | |
6684 | case BLKROSET: | |
6685 | case GET_ARRAY_INFO: | |
6686 | case GET_BITMAP_FILE: | |
6687 | case GET_DISK_INFO: | |
6688 | case HOT_ADD_DISK: | |
6689 | case HOT_REMOVE_DISK: | |
cb335f88 NS |
6690 | case RAID_AUTORUN: |
6691 | case RAID_VERSION: | |
6692 | case RESTART_ARRAY_RW: | |
6693 | case RUN_ARRAY: | |
6694 | case SET_ARRAY_INFO: | |
6695 | case SET_BITMAP_FILE: | |
6696 | case SET_DISK_FAULTY: | |
6697 | case STOP_ARRAY: | |
6698 | case STOP_ARRAY_RO: | |
1aee41f6 | 6699 | case CLUSTERED_DISK_NACK: |
cb335f88 NS |
6700 | return true; |
6701 | default: | |
6702 | return false; | |
6703 | } | |
6704 | } | |
6705 | ||
a39907fa | 6706 | static int md_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
6707 | unsigned int cmd, unsigned long arg) |
6708 | { | |
6709 | int err = 0; | |
6710 | void __user *argp = (void __user *)arg; | |
fd01b88c | 6711 | struct mddev *mddev = NULL; |
e2218350 | 6712 | int ro; |
1da177e4 | 6713 | |
cb335f88 NS |
6714 | if (!md_ioctl_valid(cmd)) |
6715 | return -ENOTTY; | |
6716 | ||
506c9e44 N |
6717 | switch (cmd) { |
6718 | case RAID_VERSION: | |
6719 | case GET_ARRAY_INFO: | |
6720 | case GET_DISK_INFO: | |
6721 | break; | |
6722 | default: | |
6723 | if (!capable(CAP_SYS_ADMIN)) | |
6724 | return -EACCES; | |
6725 | } | |
1da177e4 LT |
6726 | |
6727 | /* | |
6728 | * Commands dealing with the RAID driver but not any | |
6729 | * particular array: | |
6730 | */ | |
c02c0aeb N |
6731 | switch (cmd) { |
6732 | case RAID_VERSION: | |
6733 | err = get_version(argp); | |
3adc28d8 | 6734 | goto out; |
1da177e4 | 6735 | |
1da177e4 | 6736 | #ifndef MODULE |
c02c0aeb N |
6737 | case RAID_AUTORUN: |
6738 | err = 0; | |
6739 | autostart_arrays(arg); | |
3adc28d8 | 6740 | goto out; |
1da177e4 | 6741 | #endif |
c02c0aeb | 6742 | default:; |
1da177e4 LT |
6743 | } |
6744 | ||
6745 | /* | |
6746 | * Commands creating/starting a new array: | |
6747 | */ | |
6748 | ||
a39907fa | 6749 | mddev = bdev->bd_disk->private_data; |
1da177e4 LT |
6750 | |
6751 | if (!mddev) { | |
6752 | BUG(); | |
3adc28d8 | 6753 | goto out; |
1da177e4 LT |
6754 | } |
6755 | ||
1ca69c4b N |
6756 | /* Some actions do not requires the mutex */ |
6757 | switch (cmd) { | |
6758 | case GET_ARRAY_INFO: | |
6759 | if (!mddev->raid_disks && !mddev->external) | |
6760 | err = -ENODEV; | |
6761 | else | |
6762 | err = get_array_info(mddev, argp); | |
3adc28d8 | 6763 | goto out; |
1ca69c4b N |
6764 | |
6765 | case GET_DISK_INFO: | |
6766 | if (!mddev->raid_disks && !mddev->external) | |
6767 | err = -ENODEV; | |
6768 | else | |
6769 | err = get_disk_info(mddev, argp); | |
3adc28d8 | 6770 | goto out; |
1ca69c4b N |
6771 | |
6772 | case SET_DISK_FAULTY: | |
6773 | err = set_disk_faulty(mddev, new_decode_dev(arg)); | |
3adc28d8 | 6774 | goto out; |
4af1a041 N |
6775 | |
6776 | case GET_BITMAP_FILE: | |
6777 | err = get_bitmap_file(mddev, argp); | |
6778 | goto out; | |
6779 | ||
1ca69c4b N |
6780 | } |
6781 | ||
a7a3f08d N |
6782 | if (cmd == ADD_NEW_DISK) |
6783 | /* need to ensure md_delayed_delete() has completed */ | |
6784 | flush_workqueue(md_misc_wq); | |
6785 | ||
90f5f7ad HR |
6786 | if (cmd == HOT_REMOVE_DISK) |
6787 | /* need to ensure recovery thread has run */ | |
6788 | wait_event_interruptible_timeout(mddev->sb_wait, | |
6789 | !test_bit(MD_RECOVERY_NEEDED, | |
6790 | &mddev->flags), | |
6791 | msecs_to_jiffies(5000)); | |
260fa034 N |
6792 | if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) { |
6793 | /* Need to flush page cache, and ensure no-one else opens | |
6794 | * and writes | |
6795 | */ | |
6796 | mutex_lock(&mddev->open_mutex); | |
9ba3b7f5 | 6797 | if (mddev->pers && atomic_read(&mddev->openers) > 1) { |
260fa034 N |
6798 | mutex_unlock(&mddev->open_mutex); |
6799 | err = -EBUSY; | |
3adc28d8 | 6800 | goto out; |
260fa034 N |
6801 | } |
6802 | set_bit(MD_STILL_CLOSED, &mddev->flags); | |
6803 | mutex_unlock(&mddev->open_mutex); | |
6804 | sync_blockdev(bdev); | |
6805 | } | |
1da177e4 LT |
6806 | err = mddev_lock(mddev); |
6807 | if (err) { | |
f72ffdd6 | 6808 | printk(KERN_INFO |
1da177e4 LT |
6809 | "md: ioctl lock interrupted, reason %d, cmd %d\n", |
6810 | err, cmd); | |
3adc28d8 | 6811 | goto out; |
1da177e4 LT |
6812 | } |
6813 | ||
c02c0aeb N |
6814 | if (cmd == SET_ARRAY_INFO) { |
6815 | mdu_array_info_t info; | |
6816 | if (!arg) | |
6817 | memset(&info, 0, sizeof(info)); | |
6818 | else if (copy_from_user(&info, argp, sizeof(info))) { | |
6819 | err = -EFAULT; | |
3adc28d8 | 6820 | goto unlock; |
c02c0aeb N |
6821 | } |
6822 | if (mddev->pers) { | |
6823 | err = update_array_info(mddev, &info); | |
6824 | if (err) { | |
6825 | printk(KERN_WARNING "md: couldn't update" | |
6826 | " array info. %d\n", err); | |
3adc28d8 | 6827 | goto unlock; |
1da177e4 | 6828 | } |
3adc28d8 | 6829 | goto unlock; |
c02c0aeb N |
6830 | } |
6831 | if (!list_empty(&mddev->disks)) { | |
6832 | printk(KERN_WARNING | |
6833 | "md: array %s already has disks!\n", | |
6834 | mdname(mddev)); | |
6835 | err = -EBUSY; | |
3adc28d8 | 6836 | goto unlock; |
c02c0aeb N |
6837 | } |
6838 | if (mddev->raid_disks) { | |
6839 | printk(KERN_WARNING | |
6840 | "md: array %s already initialised!\n", | |
6841 | mdname(mddev)); | |
6842 | err = -EBUSY; | |
3adc28d8 | 6843 | goto unlock; |
c02c0aeb N |
6844 | } |
6845 | err = set_array_info(mddev, &info); | |
6846 | if (err) { | |
6847 | printk(KERN_WARNING "md: couldn't set" | |
6848 | " array info. %d\n", err); | |
3adc28d8 | 6849 | goto unlock; |
c02c0aeb | 6850 | } |
3adc28d8 | 6851 | goto unlock; |
1da177e4 LT |
6852 | } |
6853 | ||
6854 | /* | |
6855 | * Commands querying/configuring an existing array: | |
6856 | */ | |
32a7627c | 6857 | /* if we are not initialised yet, only ADD_NEW_DISK, STOP_ARRAY, |
3f9d7b0d | 6858 | * RUN_ARRAY, and GET_ and SET_BITMAP_FILE are allowed */ |
a17184a9 N |
6859 | if ((!mddev->raid_disks && !mddev->external) |
6860 | && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY | |
6861 | && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE | |
6862 | && cmd != GET_BITMAP_FILE) { | |
1da177e4 | 6863 | err = -ENODEV; |
3adc28d8 | 6864 | goto unlock; |
1da177e4 LT |
6865 | } |
6866 | ||
6867 | /* | |
6868 | * Commands even a read-only array can execute: | |
6869 | */ | |
c02c0aeb | 6870 | switch (cmd) { |
c02c0aeb N |
6871 | case RESTART_ARRAY_RW: |
6872 | err = restart_array(mddev); | |
3adc28d8 | 6873 | goto unlock; |
1da177e4 | 6874 | |
c02c0aeb N |
6875 | case STOP_ARRAY: |
6876 | err = do_md_stop(mddev, 0, bdev); | |
3adc28d8 | 6877 | goto unlock; |
1da177e4 | 6878 | |
c02c0aeb N |
6879 | case STOP_ARRAY_RO: |
6880 | err = md_set_readonly(mddev, bdev); | |
3adc28d8 | 6881 | goto unlock; |
1da177e4 | 6882 | |
3ea8929d N |
6883 | case HOT_REMOVE_DISK: |
6884 | err = hot_remove_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 6885 | goto unlock; |
3ea8929d | 6886 | |
7ceb17e8 N |
6887 | case ADD_NEW_DISK: |
6888 | /* We can support ADD_NEW_DISK on read-only arrays | |
466ad292 | 6889 | * only if we are re-adding a preexisting device. |
7ceb17e8 N |
6890 | * So require mddev->pers and MD_DISK_SYNC. |
6891 | */ | |
6892 | if (mddev->pers) { | |
6893 | mdu_disk_info_t info; | |
6894 | if (copy_from_user(&info, argp, sizeof(info))) | |
6895 | err = -EFAULT; | |
6896 | else if (!(info.state & (1<<MD_DISK_SYNC))) | |
6897 | /* Need to clear read-only for this */ | |
6898 | break; | |
6899 | else | |
6900 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 6901 | goto unlock; |
7ceb17e8 N |
6902 | } |
6903 | break; | |
6904 | ||
c02c0aeb N |
6905 | case BLKROSET: |
6906 | if (get_user(ro, (int __user *)(arg))) { | |
6907 | err = -EFAULT; | |
3adc28d8 | 6908 | goto unlock; |
c02c0aeb N |
6909 | } |
6910 | err = -EINVAL; | |
e2218350 | 6911 | |
c02c0aeb N |
6912 | /* if the bdev is going readonly the value of mddev->ro |
6913 | * does not matter, no writes are coming | |
6914 | */ | |
6915 | if (ro) | |
3adc28d8 | 6916 | goto unlock; |
e2218350 | 6917 | |
c02c0aeb N |
6918 | /* are we are already prepared for writes? */ |
6919 | if (mddev->ro != 1) | |
3adc28d8 | 6920 | goto unlock; |
e2218350 | 6921 | |
c02c0aeb N |
6922 | /* transitioning to readauto need only happen for |
6923 | * arrays that call md_write_start | |
6924 | */ | |
6925 | if (mddev->pers) { | |
6926 | err = restart_array(mddev); | |
6927 | if (err == 0) { | |
6928 | mddev->ro = 2; | |
6929 | set_disk_ro(mddev->gendisk, 0); | |
e2218350 | 6930 | } |
c02c0aeb | 6931 | } |
3adc28d8 | 6932 | goto unlock; |
1da177e4 LT |
6933 | } |
6934 | ||
6935 | /* | |
6936 | * The remaining ioctls are changing the state of the | |
f91de92e | 6937 | * superblock, so we do not allow them on read-only arrays. |
1da177e4 | 6938 | */ |
326eb17d | 6939 | if (mddev->ro && mddev->pers) { |
f91de92e N |
6940 | if (mddev->ro == 2) { |
6941 | mddev->ro = 0; | |
00bcb4ac | 6942 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 6943 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f3378b48 N |
6944 | /* mddev_unlock will wake thread */ |
6945 | /* If a device failed while we were read-only, we | |
6946 | * need to make sure the metadata is updated now. | |
6947 | */ | |
6948 | if (test_bit(MD_CHANGE_DEVS, &mddev->flags)) { | |
6949 | mddev_unlock(mddev); | |
6950 | wait_event(mddev->sb_wait, | |
6951 | !test_bit(MD_CHANGE_DEVS, &mddev->flags) && | |
6952 | !test_bit(MD_CHANGE_PENDING, &mddev->flags)); | |
29f097c4 | 6953 | mddev_lock_nointr(mddev); |
f3378b48 | 6954 | } |
f91de92e N |
6955 | } else { |
6956 | err = -EROFS; | |
3adc28d8 | 6957 | goto unlock; |
f91de92e | 6958 | } |
1da177e4 LT |
6959 | } |
6960 | ||
c02c0aeb N |
6961 | switch (cmd) { |
6962 | case ADD_NEW_DISK: | |
1da177e4 | 6963 | { |
c02c0aeb N |
6964 | mdu_disk_info_t info; |
6965 | if (copy_from_user(&info, argp, sizeof(info))) | |
6966 | err = -EFAULT; | |
6967 | else | |
6968 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 6969 | goto unlock; |
c02c0aeb | 6970 | } |
1da177e4 | 6971 | |
1aee41f6 GR |
6972 | case CLUSTERED_DISK_NACK: |
6973 | if (mddev_is_clustered(mddev)) | |
6974 | md_cluster_ops->new_disk_ack(mddev, false); | |
6975 | else | |
6976 | err = -EINVAL; | |
6977 | goto unlock; | |
6978 | ||
c02c0aeb N |
6979 | case HOT_ADD_DISK: |
6980 | err = hot_add_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 6981 | goto unlock; |
1da177e4 | 6982 | |
c02c0aeb N |
6983 | case RUN_ARRAY: |
6984 | err = do_md_run(mddev); | |
3adc28d8 | 6985 | goto unlock; |
1da177e4 | 6986 | |
c02c0aeb N |
6987 | case SET_BITMAP_FILE: |
6988 | err = set_bitmap_file(mddev, (int)arg); | |
3adc28d8 | 6989 | goto unlock; |
32a7627c | 6990 | |
c02c0aeb N |
6991 | default: |
6992 | err = -EINVAL; | |
3adc28d8 | 6993 | goto unlock; |
1da177e4 LT |
6994 | } |
6995 | ||
3adc28d8 | 6996 | unlock: |
d3374825 N |
6997 | if (mddev->hold_active == UNTIL_IOCTL && |
6998 | err != -EINVAL) | |
6999 | mddev->hold_active = 0; | |
1da177e4 | 7000 | mddev_unlock(mddev); |
3adc28d8 | 7001 | out: |
1da177e4 LT |
7002 | return err; |
7003 | } | |
aa98aa31 AB |
7004 | #ifdef CONFIG_COMPAT |
7005 | static int md_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
7006 | unsigned int cmd, unsigned long arg) | |
7007 | { | |
7008 | switch (cmd) { | |
7009 | case HOT_REMOVE_DISK: | |
7010 | case HOT_ADD_DISK: | |
7011 | case SET_DISK_FAULTY: | |
7012 | case SET_BITMAP_FILE: | |
7013 | /* These take in integer arg, do not convert */ | |
7014 | break; | |
7015 | default: | |
7016 | arg = (unsigned long)compat_ptr(arg); | |
7017 | break; | |
7018 | } | |
7019 | ||
7020 | return md_ioctl(bdev, mode, cmd, arg); | |
7021 | } | |
7022 | #endif /* CONFIG_COMPAT */ | |
1da177e4 | 7023 | |
a39907fa | 7024 | static int md_open(struct block_device *bdev, fmode_t mode) |
1da177e4 LT |
7025 | { |
7026 | /* | |
7027 | * Succeed if we can lock the mddev, which confirms that | |
7028 | * it isn't being stopped right now. | |
7029 | */ | |
fd01b88c | 7030 | struct mddev *mddev = mddev_find(bdev->bd_dev); |
1da177e4 LT |
7031 | int err; |
7032 | ||
0c098220 YL |
7033 | if (!mddev) |
7034 | return -ENODEV; | |
7035 | ||
d3374825 N |
7036 | if (mddev->gendisk != bdev->bd_disk) { |
7037 | /* we are racing with mddev_put which is discarding this | |
7038 | * bd_disk. | |
7039 | */ | |
7040 | mddev_put(mddev); | |
7041 | /* Wait until bdev->bd_disk is definitely gone */ | |
e804ac78 | 7042 | flush_workqueue(md_misc_wq); |
d3374825 N |
7043 | /* Then retry the open from the top */ |
7044 | return -ERESTARTSYS; | |
7045 | } | |
7046 | BUG_ON(mddev != bdev->bd_disk->private_data); | |
7047 | ||
c8c00a69 | 7048 | if ((err = mutex_lock_interruptible(&mddev->open_mutex))) |
1da177e4 LT |
7049 | goto out; |
7050 | ||
7051 | err = 0; | |
f2ea68cf | 7052 | atomic_inc(&mddev->openers); |
260fa034 | 7053 | clear_bit(MD_STILL_CLOSED, &mddev->flags); |
c8c00a69 | 7054 | mutex_unlock(&mddev->open_mutex); |
1da177e4 | 7055 | |
f0b4f7e2 | 7056 | check_disk_change(bdev); |
1da177e4 LT |
7057 | out: |
7058 | return err; | |
7059 | } | |
7060 | ||
db2a144b | 7061 | static void md_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 7062 | { |
f72ffdd6 | 7063 | struct mddev *mddev = disk->private_data; |
1da177e4 | 7064 | |
52e5f9d1 | 7065 | BUG_ON(!mddev); |
f2ea68cf | 7066 | atomic_dec(&mddev->openers); |
1da177e4 | 7067 | mddev_put(mddev); |
1da177e4 | 7068 | } |
f0b4f7e2 N |
7069 | |
7070 | static int md_media_changed(struct gendisk *disk) | |
7071 | { | |
fd01b88c | 7072 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7073 | |
7074 | return mddev->changed; | |
7075 | } | |
7076 | ||
7077 | static int md_revalidate(struct gendisk *disk) | |
7078 | { | |
fd01b88c | 7079 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7080 | |
7081 | mddev->changed = 0; | |
7082 | return 0; | |
7083 | } | |
83d5cde4 | 7084 | static const struct block_device_operations md_fops = |
1da177e4 LT |
7085 | { |
7086 | .owner = THIS_MODULE, | |
a39907fa AV |
7087 | .open = md_open, |
7088 | .release = md_release, | |
b492b852 | 7089 | .ioctl = md_ioctl, |
aa98aa31 AB |
7090 | #ifdef CONFIG_COMPAT |
7091 | .compat_ioctl = md_compat_ioctl, | |
7092 | #endif | |
a885c8c4 | 7093 | .getgeo = md_getgeo, |
f0b4f7e2 N |
7094 | .media_changed = md_media_changed, |
7095 | .revalidate_disk= md_revalidate, | |
1da177e4 LT |
7096 | }; |
7097 | ||
f72ffdd6 | 7098 | static int md_thread(void *arg) |
1da177e4 | 7099 | { |
2b8bf345 | 7100 | struct md_thread *thread = arg; |
1da177e4 | 7101 | |
1da177e4 LT |
7102 | /* |
7103 | * md_thread is a 'system-thread', it's priority should be very | |
7104 | * high. We avoid resource deadlocks individually in each | |
7105 | * raid personality. (RAID5 does preallocation) We also use RR and | |
7106 | * the very same RT priority as kswapd, thus we will never get | |
7107 | * into a priority inversion deadlock. | |
7108 | * | |
7109 | * we definitely have to have equal or higher priority than | |
7110 | * bdflush, otherwise bdflush will deadlock if there are too | |
7111 | * many dirty RAID5 blocks. | |
7112 | */ | |
1da177e4 | 7113 | |
6985c43f | 7114 | allow_signal(SIGKILL); |
a6fb0934 | 7115 | while (!kthread_should_stop()) { |
1da177e4 | 7116 | |
93588e22 N |
7117 | /* We need to wait INTERRUPTIBLE so that |
7118 | * we don't add to the load-average. | |
7119 | * That means we need to be sure no signals are | |
7120 | * pending | |
7121 | */ | |
7122 | if (signal_pending(current)) | |
7123 | flush_signals(current); | |
7124 | ||
7125 | wait_event_interruptible_timeout | |
7126 | (thread->wqueue, | |
7127 | test_bit(THREAD_WAKEUP, &thread->flags) | |
7128 | || kthread_should_stop(), | |
7129 | thread->timeout); | |
1da177e4 | 7130 | |
6c987910 N |
7131 | clear_bit(THREAD_WAKEUP, &thread->flags); |
7132 | if (!kthread_should_stop()) | |
4ed8731d | 7133 | thread->run(thread); |
1da177e4 | 7134 | } |
a6fb0934 | 7135 | |
1da177e4 LT |
7136 | return 0; |
7137 | } | |
7138 | ||
2b8bf345 | 7139 | void md_wakeup_thread(struct md_thread *thread) |
1da177e4 LT |
7140 | { |
7141 | if (thread) { | |
36a4e1fe | 7142 | pr_debug("md: waking up MD thread %s.\n", thread->tsk->comm); |
1da177e4 LT |
7143 | set_bit(THREAD_WAKEUP, &thread->flags); |
7144 | wake_up(&thread->wqueue); | |
7145 | } | |
7146 | } | |
6c144d31 | 7147 | EXPORT_SYMBOL(md_wakeup_thread); |
1da177e4 | 7148 | |
4ed8731d SL |
7149 | struct md_thread *md_register_thread(void (*run) (struct md_thread *), |
7150 | struct mddev *mddev, const char *name) | |
1da177e4 | 7151 | { |
2b8bf345 | 7152 | struct md_thread *thread; |
1da177e4 | 7153 | |
2b8bf345 | 7154 | thread = kzalloc(sizeof(struct md_thread), GFP_KERNEL); |
1da177e4 LT |
7155 | if (!thread) |
7156 | return NULL; | |
7157 | ||
1da177e4 LT |
7158 | init_waitqueue_head(&thread->wqueue); |
7159 | ||
1da177e4 LT |
7160 | thread->run = run; |
7161 | thread->mddev = mddev; | |
32a7627c | 7162 | thread->timeout = MAX_SCHEDULE_TIMEOUT; |
0da3c619 N |
7163 | thread->tsk = kthread_run(md_thread, thread, |
7164 | "%s_%s", | |
7165 | mdname(thread->mddev), | |
0232605d | 7166 | name); |
a6fb0934 | 7167 | if (IS_ERR(thread->tsk)) { |
1da177e4 LT |
7168 | kfree(thread); |
7169 | return NULL; | |
7170 | } | |
1da177e4 LT |
7171 | return thread; |
7172 | } | |
6c144d31 | 7173 | EXPORT_SYMBOL(md_register_thread); |
1da177e4 | 7174 | |
2b8bf345 | 7175 | void md_unregister_thread(struct md_thread **threadp) |
1da177e4 | 7176 | { |
2b8bf345 | 7177 | struct md_thread *thread = *threadp; |
e0cf8f04 N |
7178 | if (!thread) |
7179 | return; | |
36a4e1fe | 7180 | pr_debug("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk)); |
01f96c0a N |
7181 | /* Locking ensures that mddev_unlock does not wake_up a |
7182 | * non-existent thread | |
7183 | */ | |
7184 | spin_lock(&pers_lock); | |
7185 | *threadp = NULL; | |
7186 | spin_unlock(&pers_lock); | |
a6fb0934 N |
7187 | |
7188 | kthread_stop(thread->tsk); | |
1da177e4 LT |
7189 | kfree(thread); |
7190 | } | |
6c144d31 | 7191 | EXPORT_SYMBOL(md_unregister_thread); |
1da177e4 | 7192 | |
fd01b88c | 7193 | void md_error(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 7194 | { |
b2d444d7 | 7195 | if (!rdev || test_bit(Faulty, &rdev->flags)) |
1da177e4 | 7196 | return; |
6bfe0b49 | 7197 | |
de393cde | 7198 | if (!mddev->pers || !mddev->pers->error_handler) |
1da177e4 LT |
7199 | return; |
7200 | mddev->pers->error_handler(mddev,rdev); | |
72a23c21 NB |
7201 | if (mddev->degraded) |
7202 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
00bcb4ac | 7203 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
7204 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
7205 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7206 | md_wakeup_thread(mddev->thread); | |
768a418d | 7207 | if (mddev->event_work.func) |
e804ac78 | 7208 | queue_work(md_misc_wq, &mddev->event_work); |
bb9ef716 | 7209 | md_new_event(mddev); |
1da177e4 | 7210 | } |
6c144d31 | 7211 | EXPORT_SYMBOL(md_error); |
1da177e4 LT |
7212 | |
7213 | /* seq_file implementation /proc/mdstat */ | |
7214 | ||
7215 | static void status_unused(struct seq_file *seq) | |
7216 | { | |
7217 | int i = 0; | |
3cb03002 | 7218 | struct md_rdev *rdev; |
1da177e4 LT |
7219 | |
7220 | seq_printf(seq, "unused devices: "); | |
7221 | ||
159ec1fc | 7222 | list_for_each_entry(rdev, &pending_raid_disks, same_set) { |
1da177e4 LT |
7223 | char b[BDEVNAME_SIZE]; |
7224 | i++; | |
7225 | seq_printf(seq, "%s ", | |
7226 | bdevname(rdev->bdev,b)); | |
7227 | } | |
7228 | if (!i) | |
7229 | seq_printf(seq, "<none>"); | |
7230 | ||
7231 | seq_printf(seq, "\n"); | |
7232 | } | |
7233 | ||
f7851be7 | 7234 | static int status_resync(struct seq_file *seq, struct mddev *mddev) |
1da177e4 | 7235 | { |
dd71cf6b N |
7236 | sector_t max_sectors, resync, res; |
7237 | unsigned long dt, db; | |
7238 | sector_t rt; | |
4588b42e N |
7239 | int scale; |
7240 | unsigned int per_milli; | |
1da177e4 | 7241 | |
c804cdec N |
7242 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
7243 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
dd71cf6b | 7244 | max_sectors = mddev->resync_max_sectors; |
1da177e4 | 7245 | else |
dd71cf6b | 7246 | max_sectors = mddev->dev_sectors; |
1da177e4 | 7247 | |
f7851be7 N |
7248 | resync = mddev->curr_resync; |
7249 | if (resync <= 3) { | |
7250 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) | |
7251 | /* Still cleaning up */ | |
7252 | resync = max_sectors; | |
7253 | } else | |
7254 | resync -= atomic_read(&mddev->recovery_active); | |
7255 | ||
7256 | if (resync == 0) { | |
7257 | if (mddev->recovery_cp < MaxSector) { | |
7258 | seq_printf(seq, "\tresync=PENDING"); | |
7259 | return 1; | |
7260 | } | |
7261 | return 0; | |
7262 | } | |
7263 | if (resync < 3) { | |
7264 | seq_printf(seq, "\tresync=DELAYED"); | |
7265 | return 1; | |
7266 | } | |
7267 | ||
403df478 | 7268 | WARN_ON(max_sectors == 0); |
4588b42e | 7269 | /* Pick 'scale' such that (resync>>scale)*1000 will fit |
dd71cf6b | 7270 | * in a sector_t, and (max_sectors>>scale) will fit in a |
4588b42e N |
7271 | * u32, as those are the requirements for sector_div. |
7272 | * Thus 'scale' must be at least 10 | |
7273 | */ | |
7274 | scale = 10; | |
7275 | if (sizeof(sector_t) > sizeof(unsigned long)) { | |
dd71cf6b | 7276 | while ( max_sectors/2 > (1ULL<<(scale+32))) |
4588b42e N |
7277 | scale++; |
7278 | } | |
7279 | res = (resync>>scale)*1000; | |
dd71cf6b | 7280 | sector_div(res, (u32)((max_sectors>>scale)+1)); |
4588b42e N |
7281 | |
7282 | per_milli = res; | |
1da177e4 | 7283 | { |
4588b42e | 7284 | int i, x = per_milli/50, y = 20-x; |
1da177e4 LT |
7285 | seq_printf(seq, "["); |
7286 | for (i = 0; i < x; i++) | |
7287 | seq_printf(seq, "="); | |
7288 | seq_printf(seq, ">"); | |
7289 | for (i = 0; i < y; i++) | |
7290 | seq_printf(seq, "."); | |
7291 | seq_printf(seq, "] "); | |
7292 | } | |
4588b42e | 7293 | seq_printf(seq, " %s =%3u.%u%% (%llu/%llu)", |
ccfcc3c1 N |
7294 | (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)? |
7295 | "reshape" : | |
61df9d91 N |
7296 | (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)? |
7297 | "check" : | |
7298 | (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? | |
7299 | "resync" : "recovery"))), | |
7300 | per_milli/10, per_milli % 10, | |
dd71cf6b N |
7301 | (unsigned long long) resync/2, |
7302 | (unsigned long long) max_sectors/2); | |
1da177e4 LT |
7303 | |
7304 | /* | |
1da177e4 LT |
7305 | * dt: time from mark until now |
7306 | * db: blocks written from mark until now | |
7307 | * rt: remaining time | |
dd71cf6b N |
7308 | * |
7309 | * rt is a sector_t, so could be 32bit or 64bit. | |
7310 | * So we divide before multiply in case it is 32bit and close | |
7311 | * to the limit. | |
25985edc | 7312 | * We scale the divisor (db) by 32 to avoid losing precision |
dd71cf6b N |
7313 | * near the end of resync when the number of remaining sectors |
7314 | * is close to 'db'. | |
7315 | * We then divide rt by 32 after multiplying by db to compensate. | |
7316 | * The '+1' avoids division by zero if db is very small. | |
1da177e4 LT |
7317 | */ |
7318 | dt = ((jiffies - mddev->resync_mark) / HZ); | |
7319 | if (!dt) dt++; | |
ff4e8d9a N |
7320 | db = (mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active)) |
7321 | - mddev->resync_mark_cnt; | |
1da177e4 | 7322 | |
dd71cf6b N |
7323 | rt = max_sectors - resync; /* number of remaining sectors */ |
7324 | sector_div(rt, db/32+1); | |
7325 | rt *= dt; | |
7326 | rt >>= 5; | |
7327 | ||
7328 | seq_printf(seq, " finish=%lu.%lumin", (unsigned long)rt / 60, | |
7329 | ((unsigned long)rt % 60)/6); | |
1da177e4 | 7330 | |
ff4e8d9a | 7331 | seq_printf(seq, " speed=%ldK/sec", db/2/dt); |
f7851be7 | 7332 | return 1; |
1da177e4 LT |
7333 | } |
7334 | ||
7335 | static void *md_seq_start(struct seq_file *seq, loff_t *pos) | |
7336 | { | |
7337 | struct list_head *tmp; | |
7338 | loff_t l = *pos; | |
fd01b88c | 7339 | struct mddev *mddev; |
1da177e4 LT |
7340 | |
7341 | if (l >= 0x10000) | |
7342 | return NULL; | |
7343 | if (!l--) | |
7344 | /* header */ | |
7345 | return (void*)1; | |
7346 | ||
7347 | spin_lock(&all_mddevs_lock); | |
7348 | list_for_each(tmp,&all_mddevs) | |
7349 | if (!l--) { | |
fd01b88c | 7350 | mddev = list_entry(tmp, struct mddev, all_mddevs); |
1da177e4 LT |
7351 | mddev_get(mddev); |
7352 | spin_unlock(&all_mddevs_lock); | |
7353 | return mddev; | |
7354 | } | |
7355 | spin_unlock(&all_mddevs_lock); | |
7356 | if (!l--) | |
7357 | return (void*)2;/* tail */ | |
7358 | return NULL; | |
7359 | } | |
7360 | ||
7361 | static void *md_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
7362 | { | |
7363 | struct list_head *tmp; | |
fd01b88c | 7364 | struct mddev *next_mddev, *mddev = v; |
f72ffdd6 | 7365 | |
1da177e4 LT |
7366 | ++*pos; |
7367 | if (v == (void*)2) | |
7368 | return NULL; | |
7369 | ||
7370 | spin_lock(&all_mddevs_lock); | |
7371 | if (v == (void*)1) | |
7372 | tmp = all_mddevs.next; | |
7373 | else | |
7374 | tmp = mddev->all_mddevs.next; | |
7375 | if (tmp != &all_mddevs) | |
fd01b88c | 7376 | next_mddev = mddev_get(list_entry(tmp,struct mddev,all_mddevs)); |
1da177e4 LT |
7377 | else { |
7378 | next_mddev = (void*)2; | |
7379 | *pos = 0x10000; | |
f72ffdd6 | 7380 | } |
1da177e4 LT |
7381 | spin_unlock(&all_mddevs_lock); |
7382 | ||
7383 | if (v != (void*)1) | |
7384 | mddev_put(mddev); | |
7385 | return next_mddev; | |
7386 | ||
7387 | } | |
7388 | ||
7389 | static void md_seq_stop(struct seq_file *seq, void *v) | |
7390 | { | |
fd01b88c | 7391 | struct mddev *mddev = v; |
1da177e4 LT |
7392 | |
7393 | if (mddev && v != (void*)1 && v != (void*)2) | |
7394 | mddev_put(mddev); | |
7395 | } | |
7396 | ||
7397 | static int md_seq_show(struct seq_file *seq, void *v) | |
7398 | { | |
fd01b88c | 7399 | struct mddev *mddev = v; |
dd8ac336 | 7400 | sector_t sectors; |
3cb03002 | 7401 | struct md_rdev *rdev; |
1da177e4 LT |
7402 | |
7403 | if (v == (void*)1) { | |
84fc4b56 | 7404 | struct md_personality *pers; |
1da177e4 LT |
7405 | seq_printf(seq, "Personalities : "); |
7406 | spin_lock(&pers_lock); | |
2604b703 N |
7407 | list_for_each_entry(pers, &pers_list, list) |
7408 | seq_printf(seq, "[%s] ", pers->name); | |
1da177e4 LT |
7409 | |
7410 | spin_unlock(&pers_lock); | |
7411 | seq_printf(seq, "\n"); | |
f1514638 | 7412 | seq->poll_event = atomic_read(&md_event_count); |
1da177e4 LT |
7413 | return 0; |
7414 | } | |
7415 | if (v == (void*)2) { | |
7416 | status_unused(seq); | |
7417 | return 0; | |
7418 | } | |
7419 | ||
36d091f4 | 7420 | spin_lock(&mddev->lock); |
1da177e4 LT |
7421 | if (mddev->pers || mddev->raid_disks || !list_empty(&mddev->disks)) { |
7422 | seq_printf(seq, "%s : %sactive", mdname(mddev), | |
7423 | mddev->pers ? "" : "in"); | |
7424 | if (mddev->pers) { | |
f91de92e | 7425 | if (mddev->ro==1) |
1da177e4 | 7426 | seq_printf(seq, " (read-only)"); |
f91de92e | 7427 | if (mddev->ro==2) |
52720ae7 | 7428 | seq_printf(seq, " (auto-read-only)"); |
1da177e4 LT |
7429 | seq_printf(seq, " %s", mddev->pers->name); |
7430 | } | |
7431 | ||
dd8ac336 | 7432 | sectors = 0; |
f97fcad3 N |
7433 | rcu_read_lock(); |
7434 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 LT |
7435 | char b[BDEVNAME_SIZE]; |
7436 | seq_printf(seq, " %s[%d]", | |
7437 | bdevname(rdev->bdev,b), rdev->desc_nr); | |
8ddf9efe N |
7438 | if (test_bit(WriteMostly, &rdev->flags)) |
7439 | seq_printf(seq, "(W)"); | |
9efdca16 SL |
7440 | if (test_bit(Journal, &rdev->flags)) |
7441 | seq_printf(seq, "(J)"); | |
b2d444d7 | 7442 | if (test_bit(Faulty, &rdev->flags)) { |
1da177e4 LT |
7443 | seq_printf(seq, "(F)"); |
7444 | continue; | |
2d78f8c4 N |
7445 | } |
7446 | if (rdev->raid_disk < 0) | |
b325a32e | 7447 | seq_printf(seq, "(S)"); /* spare */ |
2d78f8c4 N |
7448 | if (test_bit(Replacement, &rdev->flags)) |
7449 | seq_printf(seq, "(R)"); | |
dd8ac336 | 7450 | sectors += rdev->sectors; |
1da177e4 | 7451 | } |
f97fcad3 | 7452 | rcu_read_unlock(); |
1da177e4 LT |
7453 | |
7454 | if (!list_empty(&mddev->disks)) { | |
7455 | if (mddev->pers) | |
7456 | seq_printf(seq, "\n %llu blocks", | |
f233ea5c AN |
7457 | (unsigned long long) |
7458 | mddev->array_sectors / 2); | |
1da177e4 LT |
7459 | else |
7460 | seq_printf(seq, "\n %llu blocks", | |
dd8ac336 | 7461 | (unsigned long long)sectors / 2); |
1da177e4 | 7462 | } |
1cd6bf19 N |
7463 | if (mddev->persistent) { |
7464 | if (mddev->major_version != 0 || | |
7465 | mddev->minor_version != 90) { | |
7466 | seq_printf(seq," super %d.%d", | |
7467 | mddev->major_version, | |
7468 | mddev->minor_version); | |
7469 | } | |
e691063a N |
7470 | } else if (mddev->external) |
7471 | seq_printf(seq, " super external:%s", | |
7472 | mddev->metadata_type); | |
7473 | else | |
1cd6bf19 | 7474 | seq_printf(seq, " super non-persistent"); |
1da177e4 LT |
7475 | |
7476 | if (mddev->pers) { | |
d710e138 | 7477 | mddev->pers->status(seq, mddev); |
f72ffdd6 | 7478 | seq_printf(seq, "\n "); |
8e1b39d6 | 7479 | if (mddev->pers->sync_request) { |
f7851be7 | 7480 | if (status_resync(seq, mddev)) |
8e1b39d6 | 7481 | seq_printf(seq, "\n "); |
8e1b39d6 | 7482 | } |
32a7627c N |
7483 | } else |
7484 | seq_printf(seq, "\n "); | |
7485 | ||
57148964 | 7486 | bitmap_status(seq, mddev->bitmap); |
1da177e4 LT |
7487 | |
7488 | seq_printf(seq, "\n"); | |
7489 | } | |
36d091f4 | 7490 | spin_unlock(&mddev->lock); |
f72ffdd6 | 7491 | |
1da177e4 LT |
7492 | return 0; |
7493 | } | |
7494 | ||
110518bc | 7495 | static const struct seq_operations md_seq_ops = { |
1da177e4 LT |
7496 | .start = md_seq_start, |
7497 | .next = md_seq_next, | |
7498 | .stop = md_seq_stop, | |
7499 | .show = md_seq_show, | |
7500 | }; | |
7501 | ||
7502 | static int md_seq_open(struct inode *inode, struct file *file) | |
7503 | { | |
f1514638 | 7504 | struct seq_file *seq; |
1da177e4 LT |
7505 | int error; |
7506 | ||
7507 | error = seq_open(file, &md_seq_ops); | |
d7603b7e | 7508 | if (error) |
f1514638 KS |
7509 | return error; |
7510 | ||
7511 | seq = file->private_data; | |
7512 | seq->poll_event = atomic_read(&md_event_count); | |
1da177e4 LT |
7513 | return error; |
7514 | } | |
7515 | ||
e2f23b60 | 7516 | static int md_unloading; |
d7603b7e N |
7517 | static unsigned int mdstat_poll(struct file *filp, poll_table *wait) |
7518 | { | |
f1514638 | 7519 | struct seq_file *seq = filp->private_data; |
d7603b7e N |
7520 | int mask; |
7521 | ||
e2f23b60 | 7522 | if (md_unloading) |
7d7e64f2 | 7523 | return POLLIN|POLLRDNORM|POLLERR|POLLPRI; |
d7603b7e N |
7524 | poll_wait(filp, &md_event_waiters, wait); |
7525 | ||
7526 | /* always allow read */ | |
7527 | mask = POLLIN | POLLRDNORM; | |
7528 | ||
f1514638 | 7529 | if (seq->poll_event != atomic_read(&md_event_count)) |
d7603b7e N |
7530 | mask |= POLLERR | POLLPRI; |
7531 | return mask; | |
7532 | } | |
7533 | ||
fa027c2a | 7534 | static const struct file_operations md_seq_fops = { |
e24650c2 | 7535 | .owner = THIS_MODULE, |
1da177e4 LT |
7536 | .open = md_seq_open, |
7537 | .read = seq_read, | |
7538 | .llseek = seq_lseek, | |
c3f94b40 | 7539 | .release = seq_release_private, |
d7603b7e | 7540 | .poll = mdstat_poll, |
1da177e4 LT |
7541 | }; |
7542 | ||
84fc4b56 | 7543 | int register_md_personality(struct md_personality *p) |
1da177e4 | 7544 | { |
50bd3774 CY |
7545 | printk(KERN_INFO "md: %s personality registered for level %d\n", |
7546 | p->name, p->level); | |
1da177e4 | 7547 | spin_lock(&pers_lock); |
2604b703 | 7548 | list_add_tail(&p->list, &pers_list); |
1da177e4 LT |
7549 | spin_unlock(&pers_lock); |
7550 | return 0; | |
7551 | } | |
6c144d31 | 7552 | EXPORT_SYMBOL(register_md_personality); |
1da177e4 | 7553 | |
84fc4b56 | 7554 | int unregister_md_personality(struct md_personality *p) |
1da177e4 | 7555 | { |
2604b703 | 7556 | printk(KERN_INFO "md: %s personality unregistered\n", p->name); |
1da177e4 | 7557 | spin_lock(&pers_lock); |
2604b703 | 7558 | list_del_init(&p->list); |
1da177e4 LT |
7559 | spin_unlock(&pers_lock); |
7560 | return 0; | |
7561 | } | |
6c144d31 | 7562 | EXPORT_SYMBOL(unregister_md_personality); |
1da177e4 | 7563 | |
6022e75b N |
7564 | int register_md_cluster_operations(struct md_cluster_operations *ops, |
7565 | struct module *module) | |
edb39c9d | 7566 | { |
6022e75b | 7567 | int ret = 0; |
edb39c9d | 7568 | spin_lock(&pers_lock); |
6022e75b N |
7569 | if (md_cluster_ops != NULL) |
7570 | ret = -EALREADY; | |
7571 | else { | |
7572 | md_cluster_ops = ops; | |
7573 | md_cluster_mod = module; | |
7574 | } | |
edb39c9d | 7575 | spin_unlock(&pers_lock); |
6022e75b | 7576 | return ret; |
edb39c9d GR |
7577 | } |
7578 | EXPORT_SYMBOL(register_md_cluster_operations); | |
7579 | ||
7580 | int unregister_md_cluster_operations(void) | |
7581 | { | |
7582 | spin_lock(&pers_lock); | |
7583 | md_cluster_ops = NULL; | |
7584 | spin_unlock(&pers_lock); | |
7585 | return 0; | |
7586 | } | |
7587 | EXPORT_SYMBOL(unregister_md_cluster_operations); | |
7588 | ||
7589 | int md_setup_cluster(struct mddev *mddev, int nodes) | |
7590 | { | |
7591 | int err; | |
7592 | ||
7593 | err = request_module("md-cluster"); | |
7594 | if (err) { | |
7595 | pr_err("md-cluster module not found.\n"); | |
b0c26a79 | 7596 | return -ENOENT; |
edb39c9d GR |
7597 | } |
7598 | ||
7599 | spin_lock(&pers_lock); | |
7600 | if (!md_cluster_ops || !try_module_get(md_cluster_mod)) { | |
7601 | spin_unlock(&pers_lock); | |
7602 | return -ENOENT; | |
7603 | } | |
7604 | spin_unlock(&pers_lock); | |
7605 | ||
cf921cc1 | 7606 | return md_cluster_ops->join(mddev, nodes); |
edb39c9d GR |
7607 | } |
7608 | ||
7609 | void md_cluster_stop(struct mddev *mddev) | |
7610 | { | |
c4ce867f GR |
7611 | if (!md_cluster_ops) |
7612 | return; | |
edb39c9d GR |
7613 | md_cluster_ops->leave(mddev); |
7614 | module_put(md_cluster_mod); | |
7615 | } | |
7616 | ||
fd01b88c | 7617 | static int is_mddev_idle(struct mddev *mddev, int init) |
1da177e4 | 7618 | { |
f72ffdd6 | 7619 | struct md_rdev *rdev; |
1da177e4 | 7620 | int idle; |
eea1bf38 | 7621 | int curr_events; |
1da177e4 LT |
7622 | |
7623 | idle = 1; | |
4b80991c N |
7624 | rcu_read_lock(); |
7625 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 7626 | struct gendisk *disk = rdev->bdev->bd_contains->bd_disk; |
eea1bf38 N |
7627 | curr_events = (int)part_stat_read(&disk->part0, sectors[0]) + |
7628 | (int)part_stat_read(&disk->part0, sectors[1]) - | |
7629 | atomic_read(&disk->sync_io); | |
713f6ab1 N |
7630 | /* sync IO will cause sync_io to increase before the disk_stats |
7631 | * as sync_io is counted when a request starts, and | |
7632 | * disk_stats is counted when it completes. | |
7633 | * So resync activity will cause curr_events to be smaller than | |
7634 | * when there was no such activity. | |
7635 | * non-sync IO will cause disk_stat to increase without | |
7636 | * increasing sync_io so curr_events will (eventually) | |
7637 | * be larger than it was before. Once it becomes | |
7638 | * substantially larger, the test below will cause | |
7639 | * the array to appear non-idle, and resync will slow | |
7640 | * down. | |
7641 | * If there is a lot of outstanding resync activity when | |
7642 | * we set last_event to curr_events, then all that activity | |
7643 | * completing might cause the array to appear non-idle | |
7644 | * and resync will be slowed down even though there might | |
7645 | * not have been non-resync activity. This will only | |
7646 | * happen once though. 'last_events' will soon reflect | |
7647 | * the state where there is little or no outstanding | |
7648 | * resync requests, and further resync activity will | |
7649 | * always make curr_events less than last_events. | |
c0e48521 | 7650 | * |
1da177e4 | 7651 | */ |
eea1bf38 | 7652 | if (init || curr_events - rdev->last_events > 64) { |
1da177e4 LT |
7653 | rdev->last_events = curr_events; |
7654 | idle = 0; | |
7655 | } | |
7656 | } | |
4b80991c | 7657 | rcu_read_unlock(); |
1da177e4 LT |
7658 | return idle; |
7659 | } | |
7660 | ||
fd01b88c | 7661 | void md_done_sync(struct mddev *mddev, int blocks, int ok) |
1da177e4 LT |
7662 | { |
7663 | /* another "blocks" (512byte) blocks have been synced */ | |
7664 | atomic_sub(blocks, &mddev->recovery_active); | |
7665 | wake_up(&mddev->recovery_wait); | |
7666 | if (!ok) { | |
dfc70645 | 7667 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
0a19caab | 7668 | set_bit(MD_RECOVERY_ERROR, &mddev->recovery); |
1da177e4 LT |
7669 | md_wakeup_thread(mddev->thread); |
7670 | // stop recovery, signal do_sync .... | |
7671 | } | |
7672 | } | |
6c144d31 | 7673 | EXPORT_SYMBOL(md_done_sync); |
1da177e4 | 7674 | |
06d91a5f N |
7675 | /* md_write_start(mddev, bi) |
7676 | * If we need to update some array metadata (e.g. 'active' flag | |
3d310eb7 N |
7677 | * in superblock) before writing, schedule a superblock update |
7678 | * and wait for it to complete. | |
06d91a5f | 7679 | */ |
fd01b88c | 7680 | void md_write_start(struct mddev *mddev, struct bio *bi) |
1da177e4 | 7681 | { |
0fd62b86 | 7682 | int did_change = 0; |
06d91a5f | 7683 | if (bio_data_dir(bi) != WRITE) |
3d310eb7 | 7684 | return; |
06d91a5f | 7685 | |
f91de92e N |
7686 | BUG_ON(mddev->ro == 1); |
7687 | if (mddev->ro == 2) { | |
7688 | /* need to switch to read/write */ | |
7689 | mddev->ro = 0; | |
7690 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7691 | md_wakeup_thread(mddev->thread); | |
25156198 | 7692 | md_wakeup_thread(mddev->sync_thread); |
0fd62b86 | 7693 | did_change = 1; |
f91de92e | 7694 | } |
06d91a5f | 7695 | atomic_inc(&mddev->writes_pending); |
31a59e34 N |
7696 | if (mddev->safemode == 1) |
7697 | mddev->safemode = 0; | |
06d91a5f | 7698 | if (mddev->in_sync) { |
85572d7c | 7699 | spin_lock(&mddev->lock); |
3d310eb7 N |
7700 | if (mddev->in_sync) { |
7701 | mddev->in_sync = 0; | |
850b2b42 | 7702 | set_bit(MD_CHANGE_CLEAN, &mddev->flags); |
070dc6dd | 7703 | set_bit(MD_CHANGE_PENDING, &mddev->flags); |
3d310eb7 | 7704 | md_wakeup_thread(mddev->thread); |
0fd62b86 | 7705 | did_change = 1; |
3d310eb7 | 7706 | } |
85572d7c | 7707 | spin_unlock(&mddev->lock); |
06d91a5f | 7708 | } |
0fd62b86 | 7709 | if (did_change) |
00bcb4ac | 7710 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
09a44cc1 | 7711 | wait_event(mddev->sb_wait, |
09a44cc1 | 7712 | !test_bit(MD_CHANGE_PENDING, &mddev->flags)); |
1da177e4 | 7713 | } |
6c144d31 | 7714 | EXPORT_SYMBOL(md_write_start); |
1da177e4 | 7715 | |
fd01b88c | 7716 | void md_write_end(struct mddev *mddev) |
1da177e4 LT |
7717 | { |
7718 | if (atomic_dec_and_test(&mddev->writes_pending)) { | |
7719 | if (mddev->safemode == 2) | |
7720 | md_wakeup_thread(mddev->thread); | |
16f17b39 | 7721 | else if (mddev->safemode_delay) |
1da177e4 LT |
7722 | mod_timer(&mddev->safemode_timer, jiffies + mddev->safemode_delay); |
7723 | } | |
7724 | } | |
6c144d31 | 7725 | EXPORT_SYMBOL(md_write_end); |
1da177e4 | 7726 | |
2a2275d6 N |
7727 | /* md_allow_write(mddev) |
7728 | * Calling this ensures that the array is marked 'active' so that writes | |
7729 | * may proceed without blocking. It is important to call this before | |
7730 | * attempting a GFP_KERNEL allocation while holding the mddev lock. | |
7731 | * Must be called with mddev_lock held. | |
b5470dc5 | 7732 | * |
abf3508d | 7733 | * In the ->external case MD_CHANGE_PENDING can not be cleared until mddev->lock |
b5470dc5 | 7734 | * is dropped, so return -EAGAIN after notifying userspace. |
2a2275d6 | 7735 | */ |
fd01b88c | 7736 | int md_allow_write(struct mddev *mddev) |
2a2275d6 N |
7737 | { |
7738 | if (!mddev->pers) | |
b5470dc5 | 7739 | return 0; |
2a2275d6 | 7740 | if (mddev->ro) |
b5470dc5 | 7741 | return 0; |
1a0fd497 | 7742 | if (!mddev->pers->sync_request) |
b5470dc5 | 7743 | return 0; |
2a2275d6 | 7744 | |
85572d7c | 7745 | spin_lock(&mddev->lock); |
2a2275d6 N |
7746 | if (mddev->in_sync) { |
7747 | mddev->in_sync = 0; | |
7748 | set_bit(MD_CHANGE_CLEAN, &mddev->flags); | |
070dc6dd | 7749 | set_bit(MD_CHANGE_PENDING, &mddev->flags); |
2a2275d6 N |
7750 | if (mddev->safemode_delay && |
7751 | mddev->safemode == 0) | |
7752 | mddev->safemode = 1; | |
85572d7c | 7753 | spin_unlock(&mddev->lock); |
2a2275d6 | 7754 | md_update_sb(mddev, 0); |
00bcb4ac | 7755 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
2a2275d6 | 7756 | } else |
85572d7c | 7757 | spin_unlock(&mddev->lock); |
b5470dc5 | 7758 | |
070dc6dd | 7759 | if (test_bit(MD_CHANGE_PENDING, &mddev->flags)) |
b5470dc5 DW |
7760 | return -EAGAIN; |
7761 | else | |
7762 | return 0; | |
2a2275d6 N |
7763 | } |
7764 | EXPORT_SYMBOL_GPL(md_allow_write); | |
7765 | ||
1da177e4 LT |
7766 | #define SYNC_MARKS 10 |
7767 | #define SYNC_MARK_STEP (3*HZ) | |
54f89341 | 7768 | #define UPDATE_FREQUENCY (5*60*HZ) |
4ed8731d | 7769 | void md_do_sync(struct md_thread *thread) |
1da177e4 | 7770 | { |
4ed8731d | 7771 | struct mddev *mddev = thread->mddev; |
fd01b88c | 7772 | struct mddev *mddev2; |
1da177e4 LT |
7773 | unsigned int currspeed = 0, |
7774 | window; | |
ac7e50a3 | 7775 | sector_t max_sectors,j, io_sectors, recovery_done; |
1da177e4 | 7776 | unsigned long mark[SYNC_MARKS]; |
54f89341 | 7777 | unsigned long update_time; |
1da177e4 LT |
7778 | sector_t mark_cnt[SYNC_MARKS]; |
7779 | int last_mark,m; | |
7780 | struct list_head *tmp; | |
7781 | sector_t last_check; | |
57afd89f | 7782 | int skipped = 0; |
3cb03002 | 7783 | struct md_rdev *rdev; |
c4a39551 | 7784 | char *desc, *action = NULL; |
7c2c57c9 | 7785 | struct blk_plug plug; |
c186b128 | 7786 | bool cluster_resync_finished = false; |
1da177e4 LT |
7787 | |
7788 | /* just incase thread restarts... */ | |
7789 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) | |
7790 | return; | |
3991b31e N |
7791 | if (mddev->ro) {/* never try to sync a read-only array */ |
7792 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
5fd6c1dc | 7793 | return; |
3991b31e | 7794 | } |
1da177e4 | 7795 | |
61df9d91 | 7796 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
c4a39551 | 7797 | if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) { |
61df9d91 | 7798 | desc = "data-check"; |
c4a39551 JB |
7799 | action = "check"; |
7800 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
61df9d91 | 7801 | desc = "requested-resync"; |
c4a39551 JB |
7802 | action = "repair"; |
7803 | } else | |
61df9d91 N |
7804 | desc = "resync"; |
7805 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
7806 | desc = "reshape"; | |
7807 | else | |
7808 | desc = "recovery"; | |
7809 | ||
c4a39551 JB |
7810 | mddev->last_sync_action = action ?: desc; |
7811 | ||
1da177e4 LT |
7812 | /* we overload curr_resync somewhat here. |
7813 | * 0 == not engaged in resync at all | |
7814 | * 2 == checking that there is no conflict with another sync | |
7815 | * 1 == like 2, but have yielded to allow conflicting resync to | |
7816 | * commense | |
7817 | * other == active in resync - this many blocks | |
7818 | * | |
7819 | * Before starting a resync we must have set curr_resync to | |
7820 | * 2, and then checked that every "conflicting" array has curr_resync | |
7821 | * less than ours. When we find one that is the same or higher | |
7822 | * we wait on resync_wait. To avoid deadlock, we reduce curr_resync | |
7823 | * to 1 if we choose to yield (based arbitrarily on address of mddev structure). | |
7824 | * This will mean we have to start checking from the beginning again. | |
7825 | * | |
7826 | */ | |
7827 | ||
7828 | do { | |
7829 | mddev->curr_resync = 2; | |
7830 | ||
7831 | try_again: | |
404e4b43 | 7832 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
1da177e4 | 7833 | goto skip; |
29ac4aa3 | 7834 | for_each_mddev(mddev2, tmp) { |
1da177e4 LT |
7835 | if (mddev2 == mddev) |
7836 | continue; | |
90b08710 BS |
7837 | if (!mddev->parallel_resync |
7838 | && mddev2->curr_resync | |
7839 | && match_mddev_units(mddev, mddev2)) { | |
1da177e4 LT |
7840 | DEFINE_WAIT(wq); |
7841 | if (mddev < mddev2 && mddev->curr_resync == 2) { | |
7842 | /* arbitrarily yield */ | |
7843 | mddev->curr_resync = 1; | |
7844 | wake_up(&resync_wait); | |
7845 | } | |
7846 | if (mddev > mddev2 && mddev->curr_resync == 1) | |
7847 | /* no need to wait here, we can wait the next | |
7848 | * time 'round when curr_resync == 2 | |
7849 | */ | |
7850 | continue; | |
9744197c N |
7851 | /* We need to wait 'interruptible' so as not to |
7852 | * contribute to the load average, and not to | |
7853 | * be caught by 'softlockup' | |
7854 | */ | |
7855 | prepare_to_wait(&resync_wait, &wq, TASK_INTERRUPTIBLE); | |
c91abf5a | 7856 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
8712e553 | 7857 | mddev2->curr_resync >= mddev->curr_resync) { |
61df9d91 N |
7858 | printk(KERN_INFO "md: delaying %s of %s" |
7859 | " until %s has finished (they" | |
1da177e4 | 7860 | " share one or more physical units)\n", |
61df9d91 | 7861 | desc, mdname(mddev), mdname(mddev2)); |
1da177e4 | 7862 | mddev_put(mddev2); |
9744197c N |
7863 | if (signal_pending(current)) |
7864 | flush_signals(current); | |
1da177e4 LT |
7865 | schedule(); |
7866 | finish_wait(&resync_wait, &wq); | |
7867 | goto try_again; | |
7868 | } | |
7869 | finish_wait(&resync_wait, &wq); | |
7870 | } | |
7871 | } | |
7872 | } while (mddev->curr_resync < 2); | |
7873 | ||
5fd6c1dc | 7874 | j = 0; |
9d88883e | 7875 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
1da177e4 | 7876 | /* resync follows the size requested by the personality, |
57afd89f | 7877 | * which defaults to physical size, but can be virtual size |
1da177e4 LT |
7878 | */ |
7879 | max_sectors = mddev->resync_max_sectors; | |
7f7583d4 | 7880 | atomic64_set(&mddev->resync_mismatches, 0); |
5fd6c1dc | 7881 | /* we don't use the checkpoint if there's a bitmap */ |
5e96ee65 NB |
7882 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) |
7883 | j = mddev->resync_min; | |
7884 | else if (!mddev->bitmap) | |
5fd6c1dc | 7885 | j = mddev->recovery_cp; |
5e96ee65 | 7886 | |
ccfcc3c1 | 7887 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) |
c804cdec | 7888 | max_sectors = mddev->resync_max_sectors; |
5fd6c1dc | 7889 | else { |
1da177e4 | 7890 | /* recovery follows the physical size of devices */ |
58c0fed4 | 7891 | max_sectors = mddev->dev_sectors; |
5fd6c1dc | 7892 | j = MaxSector; |
4e59ca7d | 7893 | rcu_read_lock(); |
dafb20fa | 7894 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 7895 | if (rdev->raid_disk >= 0 && |
f2076e7d | 7896 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
7897 | !test_bit(Faulty, &rdev->flags) && |
7898 | !test_bit(In_sync, &rdev->flags) && | |
7899 | rdev->recovery_offset < j) | |
7900 | j = rdev->recovery_offset; | |
4e59ca7d | 7901 | rcu_read_unlock(); |
133d4527 N |
7902 | |
7903 | /* If there is a bitmap, we need to make sure all | |
7904 | * writes that started before we added a spare | |
7905 | * complete before we start doing a recovery. | |
7906 | * Otherwise the write might complete and (via | |
7907 | * bitmap_endwrite) set a bit in the bitmap after the | |
7908 | * recovery has checked that bit and skipped that | |
7909 | * region. | |
7910 | */ | |
7911 | if (mddev->bitmap) { | |
7912 | mddev->pers->quiesce(mddev, 1); | |
7913 | mddev->pers->quiesce(mddev, 0); | |
7914 | } | |
5fd6c1dc | 7915 | } |
1da177e4 | 7916 | |
61df9d91 N |
7917 | printk(KERN_INFO "md: %s of RAID array %s\n", desc, mdname(mddev)); |
7918 | printk(KERN_INFO "md: minimum _guaranteed_ speed:" | |
7919 | " %d KB/sec/disk.\n", speed_min(mddev)); | |
338cec32 | 7920 | printk(KERN_INFO "md: using maximum available idle IO bandwidth " |
61df9d91 N |
7921 | "(but not more than %d KB/sec) for %s.\n", |
7922 | speed_max(mddev), desc); | |
1da177e4 | 7923 | |
eea1bf38 | 7924 | is_mddev_idle(mddev, 1); /* this initializes IO event counters */ |
5fd6c1dc | 7925 | |
57afd89f | 7926 | io_sectors = 0; |
1da177e4 LT |
7927 | for (m = 0; m < SYNC_MARKS; m++) { |
7928 | mark[m] = jiffies; | |
57afd89f | 7929 | mark_cnt[m] = io_sectors; |
1da177e4 LT |
7930 | } |
7931 | last_mark = 0; | |
7932 | mddev->resync_mark = mark[last_mark]; | |
7933 | mddev->resync_mark_cnt = mark_cnt[last_mark]; | |
7934 | ||
7935 | /* | |
7936 | * Tune reconstruction: | |
7937 | */ | |
7938 | window = 32*(PAGE_SIZE/512); | |
ac42450c JB |
7939 | printk(KERN_INFO "md: using %dk window, over a total of %lluk.\n", |
7940 | window/2, (unsigned long long)max_sectors/2); | |
1da177e4 LT |
7941 | |
7942 | atomic_set(&mddev->recovery_active, 0); | |
1da177e4 LT |
7943 | last_check = 0; |
7944 | ||
7945 | if (j>2) { | |
c91abf5a | 7946 | printk(KERN_INFO |
61df9d91 N |
7947 | "md: resuming %s of %s from checkpoint.\n", |
7948 | desc, mdname(mddev)); | |
1da177e4 | 7949 | mddev->curr_resync = j; |
72f36d59 N |
7950 | } else |
7951 | mddev->curr_resync = 3; /* no longer delayed */ | |
75d3da43 | 7952 | mddev->curr_resync_completed = j; |
72f36d59 N |
7953 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); |
7954 | md_new_event(mddev); | |
54f89341 | 7955 | update_time = jiffies; |
1da177e4 | 7956 | |
7c2c57c9 | 7957 | blk_start_plug(&plug); |
1da177e4 | 7958 | while (j < max_sectors) { |
57afd89f | 7959 | sector_t sectors; |
1da177e4 | 7960 | |
57afd89f | 7961 | skipped = 0; |
97e4f42d | 7962 | |
7a91ee1f N |
7963 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
7964 | ((mddev->curr_resync > mddev->curr_resync_completed && | |
7965 | (mddev->curr_resync - mddev->curr_resync_completed) | |
7966 | > (max_sectors >> 4)) || | |
54f89341 | 7967 | time_after_eq(jiffies, update_time + UPDATE_FREQUENCY) || |
7a91ee1f | 7968 | (j - mddev->curr_resync_completed)*2 |
c5e19d90 N |
7969 | >= mddev->resync_max - mddev->curr_resync_completed || |
7970 | mddev->curr_resync_completed > mddev->resync_max | |
7a91ee1f | 7971 | )) { |
97e4f42d | 7972 | /* time to update curr_resync_completed */ |
97e4f42d N |
7973 | wait_event(mddev->recovery_wait, |
7974 | atomic_read(&mddev->recovery_active) == 0); | |
75d3da43 | 7975 | mddev->curr_resync_completed = j; |
35d78c66 | 7976 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && |
7977 | j > mddev->recovery_cp) | |
7978 | mddev->recovery_cp = j; | |
54f89341 | 7979 | update_time = jiffies; |
070dc6dd | 7980 | set_bit(MD_CHANGE_CLEAN, &mddev->flags); |
acb180b0 | 7981 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); |
97e4f42d | 7982 | } |
acb180b0 | 7983 | |
c91abf5a N |
7984 | while (j >= mddev->resync_max && |
7985 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
e62e58a5 N |
7986 | /* As this condition is controlled by user-space, |
7987 | * we can block indefinitely, so use '_interruptible' | |
7988 | * to avoid triggering warnings. | |
7989 | */ | |
7990 | flush_signals(current); /* just in case */ | |
7991 | wait_event_interruptible(mddev->recovery_wait, | |
7992 | mddev->resync_max > j | |
c91abf5a N |
7993 | || test_bit(MD_RECOVERY_INTR, |
7994 | &mddev->recovery)); | |
e62e58a5 | 7995 | } |
acb180b0 | 7996 | |
c91abf5a N |
7997 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
7998 | break; | |
acb180b0 | 7999 | |
09314799 | 8000 | sectors = mddev->pers->sync_request(mddev, j, &skipped); |
57afd89f | 8001 | if (sectors == 0) { |
dfc70645 | 8002 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
c91abf5a | 8003 | break; |
1da177e4 | 8004 | } |
57afd89f N |
8005 | |
8006 | if (!skipped) { /* actual IO requested */ | |
8007 | io_sectors += sectors; | |
8008 | atomic_add(sectors, &mddev->recovery_active); | |
8009 | } | |
8010 | ||
e875ecea N |
8011 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8012 | break; | |
8013 | ||
1da177e4 | 8014 | j += sectors; |
5ed1df2e N |
8015 | if (j > max_sectors) |
8016 | /* when skipping, extra large numbers can be returned. */ | |
8017 | j = max_sectors; | |
72f36d59 N |
8018 | if (j > 2) |
8019 | mddev->curr_resync = j; | |
ff4e8d9a | 8020 | mddev->curr_mark_cnt = io_sectors; |
d7603b7e | 8021 | if (last_check == 0) |
e875ecea | 8022 | /* this is the earliest that rebuild will be |
d7603b7e N |
8023 | * visible in /proc/mdstat |
8024 | */ | |
8025 | md_new_event(mddev); | |
57afd89f N |
8026 | |
8027 | if (last_check + window > io_sectors || j == max_sectors) | |
1da177e4 LT |
8028 | continue; |
8029 | ||
57afd89f | 8030 | last_check = io_sectors; |
1da177e4 LT |
8031 | repeat: |
8032 | if (time_after_eq(jiffies, mark[last_mark] + SYNC_MARK_STEP )) { | |
8033 | /* step marks */ | |
8034 | int next = (last_mark+1) % SYNC_MARKS; | |
8035 | ||
8036 | mddev->resync_mark = mark[next]; | |
8037 | mddev->resync_mark_cnt = mark_cnt[next]; | |
8038 | mark[next] = jiffies; | |
57afd89f | 8039 | mark_cnt[next] = io_sectors - atomic_read(&mddev->recovery_active); |
1da177e4 LT |
8040 | last_mark = next; |
8041 | } | |
8042 | ||
c91abf5a N |
8043 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8044 | break; | |
1da177e4 LT |
8045 | |
8046 | /* | |
8047 | * this loop exits only if either when we are slower than | |
8048 | * the 'hard' speed limit, or the system was IO-idle for | |
8049 | * a jiffy. | |
8050 | * the system might be non-idle CPU-wise, but we only care | |
8051 | * about not overloading the IO subsystem. (things like an | |
8052 | * e2fsck being done on the RAID array should execute fast) | |
8053 | */ | |
1da177e4 LT |
8054 | cond_resched(); |
8055 | ||
ac7e50a3 XN |
8056 | recovery_done = io_sectors - atomic_read(&mddev->recovery_active); |
8057 | currspeed = ((unsigned long)(recovery_done - mddev->resync_mark_cnt))/2 | |
57afd89f | 8058 | /((jiffies-mddev->resync_mark)/HZ +1) +1; |
1da177e4 | 8059 | |
88202a0c | 8060 | if (currspeed > speed_min(mddev)) { |
ac8fa419 | 8061 | if (currspeed > speed_max(mddev)) { |
c0e48521 | 8062 | msleep(500); |
1da177e4 LT |
8063 | goto repeat; |
8064 | } | |
ac8fa419 N |
8065 | if (!is_mddev_idle(mddev, 0)) { |
8066 | /* | |
8067 | * Give other IO more of a chance. | |
8068 | * The faster the devices, the less we wait. | |
8069 | */ | |
8070 | wait_event(mddev->recovery_wait, | |
8071 | !atomic_read(&mddev->recovery_active)); | |
8072 | } | |
1da177e4 LT |
8073 | } |
8074 | } | |
c91abf5a N |
8075 | printk(KERN_INFO "md: %s: %s %s.\n",mdname(mddev), desc, |
8076 | test_bit(MD_RECOVERY_INTR, &mddev->recovery) | |
8077 | ? "interrupted" : "done"); | |
1da177e4 LT |
8078 | /* |
8079 | * this also signals 'finished resyncing' to md_stop | |
8080 | */ | |
7c2c57c9 | 8081 | blk_finish_plug(&plug); |
1da177e4 LT |
8082 | wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active)); |
8083 | ||
5ed1df2e N |
8084 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8085 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
8086 | mddev->curr_resync > 2) { | |
8087 | mddev->curr_resync_completed = mddev->curr_resync; | |
8088 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); | |
8089 | } | |
c186b128 GR |
8090 | /* tell personality and other nodes that we are finished */ |
8091 | if (mddev_is_clustered(mddev)) { | |
8092 | md_cluster_ops->resync_finish(mddev); | |
8093 | cluster_resync_finished = true; | |
8094 | } | |
09314799 | 8095 | mddev->pers->sync_request(mddev, max_sectors, &skipped); |
1da177e4 | 8096 | |
dfc70645 | 8097 | if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) && |
5fd6c1dc N |
8098 | mddev->curr_resync > 2) { |
8099 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { | |
8100 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
8101 | if (mddev->curr_resync >= mddev->recovery_cp) { | |
8102 | printk(KERN_INFO | |
61df9d91 N |
8103 | "md: checkpointing %s of %s.\n", |
8104 | desc, mdname(mddev)); | |
0a19caab | 8105 | if (test_bit(MD_RECOVERY_ERROR, |
8106 | &mddev->recovery)) | |
8107 | mddev->recovery_cp = | |
8108 | mddev->curr_resync_completed; | |
8109 | else | |
8110 | mddev->recovery_cp = | |
8111 | mddev->curr_resync; | |
5fd6c1dc N |
8112 | } |
8113 | } else | |
8114 | mddev->recovery_cp = MaxSector; | |
8115 | } else { | |
8116 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) | |
8117 | mddev->curr_resync = MaxSector; | |
4e59ca7d | 8118 | rcu_read_lock(); |
dafb20fa | 8119 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 8120 | if (rdev->raid_disk >= 0 && |
70fffd0b | 8121 | mddev->delta_disks >= 0 && |
f2076e7d | 8122 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
8123 | !test_bit(Faulty, &rdev->flags) && |
8124 | !test_bit(In_sync, &rdev->flags) && | |
8125 | rdev->recovery_offset < mddev->curr_resync) | |
8126 | rdev->recovery_offset = mddev->curr_resync; | |
4e59ca7d | 8127 | rcu_read_unlock(); |
5fd6c1dc | 8128 | } |
1da177e4 | 8129 | } |
db91ff55 | 8130 | skip: |
17571284 | 8131 | set_bit(MD_CHANGE_DEVS, &mddev->flags); |
1da177e4 | 8132 | |
c186b128 GR |
8133 | if (mddev_is_clustered(mddev) && |
8134 | test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
8135 | !cluster_resync_finished) | |
8136 | md_cluster_ops->resync_finish(mddev); | |
8137 | ||
23da422b | 8138 | spin_lock(&mddev->lock); |
c07b70ad N |
8139 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { |
8140 | /* We completed so min/max setting can be forgotten if used. */ | |
8141 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
8142 | mddev->resync_min = 0; | |
8143 | mddev->resync_max = MaxSector; | |
8144 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
8145 | mddev->resync_min = mddev->curr_resync_completed; | |
f7851be7 | 8146 | set_bit(MD_RECOVERY_DONE, &mddev->recovery); |
1da177e4 | 8147 | mddev->curr_resync = 0; |
23da422b N |
8148 | spin_unlock(&mddev->lock); |
8149 | ||
1da177e4 | 8150 | wake_up(&resync_wait); |
1da177e4 | 8151 | md_wakeup_thread(mddev->thread); |
c6207277 | 8152 | return; |
1da177e4 | 8153 | } |
29269553 | 8154 | EXPORT_SYMBOL_GPL(md_do_sync); |
1da177e4 | 8155 | |
746d3207 N |
8156 | static int remove_and_add_spares(struct mddev *mddev, |
8157 | struct md_rdev *this) | |
b4c4c7b8 | 8158 | { |
3cb03002 | 8159 | struct md_rdev *rdev; |
b4c4c7b8 | 8160 | int spares = 0; |
f2a371c5 | 8161 | int removed = 0; |
b4c4c7b8 | 8162 | |
dafb20fa | 8163 | rdev_for_each(rdev, mddev) |
746d3207 N |
8164 | if ((this == NULL || rdev == this) && |
8165 | rdev->raid_disk >= 0 && | |
6bfe0b49 | 8166 | !test_bit(Blocked, &rdev->flags) && |
b4c4c7b8 | 8167 | (test_bit(Faulty, &rdev->flags) || |
f2076e7d SL |
8168 | (!test_bit(In_sync, &rdev->flags) && |
8169 | !test_bit(Journal, &rdev->flags))) && | |
b4c4c7b8 N |
8170 | atomic_read(&rdev->nr_pending)==0) { |
8171 | if (mddev->pers->hot_remove_disk( | |
b8321b68 | 8172 | mddev, rdev) == 0) { |
36fad858 | 8173 | sysfs_unlink_rdev(mddev, rdev); |
b4c4c7b8 | 8174 | rdev->raid_disk = -1; |
f2a371c5 | 8175 | removed++; |
b4c4c7b8 N |
8176 | } |
8177 | } | |
90584fc9 JB |
8178 | if (removed && mddev->kobj.sd) |
8179 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
b4c4c7b8 | 8180 | |
2910ff17 | 8181 | if (this && removed) |
746d3207 N |
8182 | goto no_add; |
8183 | ||
dafb20fa | 8184 | rdev_for_each(rdev, mddev) { |
2910ff17 GR |
8185 | if (this && this != rdev) |
8186 | continue; | |
dbb64f86 GR |
8187 | if (test_bit(Candidate, &rdev->flags)) |
8188 | continue; | |
7bfec5f3 N |
8189 | if (rdev->raid_disk >= 0 && |
8190 | !test_bit(In_sync, &rdev->flags) && | |
f2076e7d | 8191 | !test_bit(Journal, &rdev->flags) && |
7bfec5f3 N |
8192 | !test_bit(Faulty, &rdev->flags)) |
8193 | spares++; | |
7ceb17e8 N |
8194 | if (rdev->raid_disk >= 0) |
8195 | continue; | |
8196 | if (test_bit(Faulty, &rdev->flags)) | |
8197 | continue; | |
f6b6ec5c SL |
8198 | if (!test_bit(Journal, &rdev->flags)) { |
8199 | if (mddev->ro && | |
8200 | ! (rdev->saved_raid_disk >= 0 && | |
8201 | !test_bit(Bitmap_sync, &rdev->flags))) | |
8202 | continue; | |
7ceb17e8 | 8203 | |
f6b6ec5c SL |
8204 | rdev->recovery_offset = 0; |
8205 | } | |
7ceb17e8 N |
8206 | if (mddev->pers-> |
8207 | hot_add_disk(mddev, rdev) == 0) { | |
8208 | if (sysfs_link_rdev(mddev, rdev)) | |
8209 | /* failure here is OK */; | |
f6b6ec5c SL |
8210 | if (!test_bit(Journal, &rdev->flags)) |
8211 | spares++; | |
7ceb17e8 N |
8212 | md_new_event(mddev); |
8213 | set_bit(MD_CHANGE_DEVS, &mddev->flags); | |
dfc70645 | 8214 | } |
b4c4c7b8 | 8215 | } |
746d3207 | 8216 | no_add: |
6dafab6b N |
8217 | if (removed) |
8218 | set_bit(MD_CHANGE_DEVS, &mddev->flags); | |
b4c4c7b8 N |
8219 | return spares; |
8220 | } | |
7ebc0be7 | 8221 | |
ac05f256 N |
8222 | static void md_start_sync(struct work_struct *ws) |
8223 | { | |
8224 | struct mddev *mddev = container_of(ws, struct mddev, del_work); | |
c186b128 GR |
8225 | int ret = 0; |
8226 | ||
8227 | if (mddev_is_clustered(mddev)) { | |
8228 | ret = md_cluster_ops->resync_start(mddev); | |
8229 | if (ret) { | |
8230 | mddev->sync_thread = NULL; | |
8231 | goto out; | |
8232 | } | |
8233 | } | |
ac05f256 N |
8234 | |
8235 | mddev->sync_thread = md_register_thread(md_do_sync, | |
8236 | mddev, | |
8237 | "resync"); | |
c186b128 | 8238 | out: |
ac05f256 | 8239 | if (!mddev->sync_thread) { |
c186b128 GR |
8240 | if (!(mddev_is_clustered(mddev) && ret == -EAGAIN)) |
8241 | printk(KERN_ERR "%s: could not start resync" | |
8242 | " thread...\n", | |
8243 | mdname(mddev)); | |
ac05f256 N |
8244 | /* leave the spares where they are, it shouldn't hurt */ |
8245 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
8246 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
8247 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
8248 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
8249 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 8250 | wake_up(&resync_wait); |
ac05f256 N |
8251 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
8252 | &mddev->recovery)) | |
8253 | if (mddev->sysfs_action) | |
8254 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8255 | } else | |
8256 | md_wakeup_thread(mddev->sync_thread); | |
8257 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8258 | md_new_event(mddev); | |
8259 | } | |
8260 | ||
1da177e4 LT |
8261 | /* |
8262 | * This routine is regularly called by all per-raid-array threads to | |
8263 | * deal with generic issues like resync and super-block update. | |
8264 | * Raid personalities that don't have a thread (linear/raid0) do not | |
8265 | * need this as they never do any recovery or update the superblock. | |
8266 | * | |
8267 | * It does not do any resync itself, but rather "forks" off other threads | |
8268 | * to do that as needed. | |
8269 | * When it is determined that resync is needed, we set MD_RECOVERY_RUNNING in | |
8270 | * "->recovery" and create a thread at ->sync_thread. | |
dfc70645 | 8271 | * When the thread finishes it sets MD_RECOVERY_DONE |
1da177e4 LT |
8272 | * and wakeups up this thread which will reap the thread and finish up. |
8273 | * This thread also removes any faulty devices (with nr_pending == 0). | |
8274 | * | |
8275 | * The overall approach is: | |
8276 | * 1/ if the superblock needs updating, update it. | |
8277 | * 2/ If a recovery thread is running, don't do anything else. | |
8278 | * 3/ If recovery has finished, clean up, possibly marking spares active. | |
8279 | * 4/ If there are any faulty devices, remove them. | |
8280 | * 5/ If array is degraded, try to add spares devices | |
8281 | * 6/ If array has spares or is not in-sync, start a resync thread. | |
8282 | */ | |
fd01b88c | 8283 | void md_check_recovery(struct mddev *mddev) |
1da177e4 | 8284 | { |
68866e42 JB |
8285 | if (mddev->suspended) |
8286 | return; | |
8287 | ||
5f40402d | 8288 | if (mddev->bitmap) |
aa5cbd10 | 8289 | bitmap_daemon_work(mddev); |
1da177e4 | 8290 | |
fca4d848 | 8291 | if (signal_pending(current)) { |
31a59e34 | 8292 | if (mddev->pers->sync_request && !mddev->external) { |
fca4d848 N |
8293 | printk(KERN_INFO "md: %s in immediate safe mode\n", |
8294 | mdname(mddev)); | |
8295 | mddev->safemode = 2; | |
8296 | } | |
8297 | flush_signals(current); | |
8298 | } | |
8299 | ||
c89a8eee N |
8300 | if (mddev->ro && !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) |
8301 | return; | |
1da177e4 | 8302 | if ( ! ( |
142d44c3 | 8303 | (mddev->flags & MD_UPDATE_SB_FLAGS & ~ (1<<MD_CHANGE_PENDING)) || |
1da177e4 | 8304 | test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
fca4d848 | 8305 | test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
15858fa5 | 8306 | test_bit(MD_RELOAD_SB, &mddev->flags) || |
31a59e34 | 8307 | (mddev->external == 0 && mddev->safemode == 1) || |
fca4d848 N |
8308 | (mddev->safemode == 2 && ! atomic_read(&mddev->writes_pending) |
8309 | && !mddev->in_sync && mddev->recovery_cp == MaxSector) | |
1da177e4 LT |
8310 | )) |
8311 | return; | |
fca4d848 | 8312 | |
df5b89b3 | 8313 | if (mddev_trylock(mddev)) { |
b4c4c7b8 | 8314 | int spares = 0; |
fca4d848 | 8315 | |
c89a8eee | 8316 | if (mddev->ro) { |
ab16bfc7 NB |
8317 | struct md_rdev *rdev; |
8318 | if (!mddev->external && mddev->in_sync) | |
8319 | /* 'Blocked' flag not needed as failed devices | |
8320 | * will be recorded if array switched to read/write. | |
8321 | * Leaving it set will prevent the device | |
8322 | * from being removed. | |
8323 | */ | |
8324 | rdev_for_each(rdev, mddev) | |
8325 | clear_bit(Blocked, &rdev->flags); | |
7ceb17e8 N |
8326 | /* On a read-only array we can: |
8327 | * - remove failed devices | |
8328 | * - add already-in_sync devices if the array itself | |
8329 | * is in-sync. | |
8330 | * As we only add devices that are already in-sync, | |
8331 | * we can activate the spares immediately. | |
c89a8eee | 8332 | */ |
7ceb17e8 | 8333 | remove_and_add_spares(mddev, NULL); |
8313b8e5 N |
8334 | /* There is no thread, but we need to call |
8335 | * ->spare_active and clear saved_raid_disk | |
8336 | */ | |
2ac295a5 | 8337 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8313b8e5 | 8338 | md_reap_sync_thread(mddev); |
a4a3d26d | 8339 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
8313b8e5 | 8340 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
d4929add | 8341 | clear_bit(MD_CHANGE_PENDING, &mddev->flags); |
c89a8eee N |
8342 | goto unlock; |
8343 | } | |
8344 | ||
659b254f GJ |
8345 | if (mddev_is_clustered(mddev)) { |
8346 | struct md_rdev *rdev; | |
8347 | /* kick the device if another node issued a | |
8348 | * remove disk. | |
8349 | */ | |
8350 | rdev_for_each(rdev, mddev) { | |
8351 | if (test_and_clear_bit(ClusterRemove, &rdev->flags) && | |
8352 | rdev->raid_disk < 0) | |
8353 | md_kick_rdev_from_array(rdev); | |
8354 | } | |
15858fa5 GJ |
8355 | |
8356 | if (test_and_clear_bit(MD_RELOAD_SB, &mddev->flags)) | |
8357 | md_reload_sb(mddev, mddev->good_device_nr); | |
659b254f GJ |
8358 | } |
8359 | ||
31a59e34 | 8360 | if (!mddev->external) { |
0fd62b86 | 8361 | int did_change = 0; |
85572d7c | 8362 | spin_lock(&mddev->lock); |
31a59e34 N |
8363 | if (mddev->safemode && |
8364 | !atomic_read(&mddev->writes_pending) && | |
8365 | !mddev->in_sync && | |
8366 | mddev->recovery_cp == MaxSector) { | |
8367 | mddev->in_sync = 1; | |
0fd62b86 | 8368 | did_change = 1; |
070dc6dd | 8369 | set_bit(MD_CHANGE_CLEAN, &mddev->flags); |
31a59e34 N |
8370 | } |
8371 | if (mddev->safemode == 1) | |
8372 | mddev->safemode = 0; | |
85572d7c | 8373 | spin_unlock(&mddev->lock); |
0fd62b86 | 8374 | if (did_change) |
00bcb4ac | 8375 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
fca4d848 | 8376 | } |
fca4d848 | 8377 | |
2aa82191 | 8378 | if (mddev->flags & MD_UPDATE_SB_FLAGS) |
850b2b42 | 8379 | md_update_sb(mddev, 0); |
06d91a5f | 8380 | |
1da177e4 LT |
8381 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
8382 | !test_bit(MD_RECOVERY_DONE, &mddev->recovery)) { | |
8383 | /* resync/recovery still happening */ | |
8384 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8385 | goto unlock; | |
8386 | } | |
8387 | if (mddev->sync_thread) { | |
a91d5ac0 | 8388 | md_reap_sync_thread(mddev); |
1da177e4 LT |
8389 | goto unlock; |
8390 | } | |
72a23c21 NB |
8391 | /* Set RUNNING before clearing NEEDED to avoid |
8392 | * any transients in the value of "sync_action". | |
8393 | */ | |
72f36d59 | 8394 | mddev->curr_resync_completed = 0; |
23da422b | 8395 | spin_lock(&mddev->lock); |
72a23c21 | 8396 | set_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
23da422b | 8397 | spin_unlock(&mddev->lock); |
24dd469d N |
8398 | /* Clear some bits that don't mean anything, but |
8399 | * might be left set | |
8400 | */ | |
24dd469d N |
8401 | clear_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8402 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); | |
1da177e4 | 8403 | |
ed209584 N |
8404 | if (!test_and_clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
8405 | test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) | |
ac05f256 | 8406 | goto not_running; |
1da177e4 LT |
8407 | /* no recovery is running. |
8408 | * remove any failed drives, then | |
8409 | * add spares if possible. | |
72f36d59 | 8410 | * Spares are also removed and re-added, to allow |
1da177e4 LT |
8411 | * the personality to fail the re-add. |
8412 | */ | |
1da177e4 | 8413 | |
b4c4c7b8 | 8414 | if (mddev->reshape_position != MaxSector) { |
50ac168a N |
8415 | if (mddev->pers->check_reshape == NULL || |
8416 | mddev->pers->check_reshape(mddev) != 0) | |
b4c4c7b8 | 8417 | /* Cannot proceed */ |
ac05f256 | 8418 | goto not_running; |
b4c4c7b8 | 8419 | set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); |
72a23c21 | 8420 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
746d3207 | 8421 | } else if ((spares = remove_and_add_spares(mddev, NULL))) { |
24dd469d N |
8422 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
8423 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
56ac36d7 | 8424 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
72a23c21 | 8425 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
8426 | } else if (mddev->recovery_cp < MaxSector) { |
8427 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
72a23c21 | 8428 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
8429 | } else if (!test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) |
8430 | /* nothing to be done ... */ | |
ac05f256 | 8431 | goto not_running; |
24dd469d | 8432 | |
1da177e4 | 8433 | if (mddev->pers->sync_request) { |
ef99bf48 | 8434 | if (spares) { |
a654b9d8 N |
8435 | /* We are adding a device or devices to an array |
8436 | * which has the bitmap stored on all devices. | |
8437 | * So make sure all bitmap pages get written | |
8438 | */ | |
8439 | bitmap_write_all(mddev->bitmap); | |
8440 | } | |
ac05f256 N |
8441 | INIT_WORK(&mddev->del_work, md_start_sync); |
8442 | queue_work(md_misc_wq, &mddev->del_work); | |
8443 | goto unlock; | |
1da177e4 | 8444 | } |
ac05f256 | 8445 | not_running: |
72a23c21 NB |
8446 | if (!mddev->sync_thread) { |
8447 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 8448 | wake_up(&resync_wait); |
72a23c21 NB |
8449 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
8450 | &mddev->recovery)) | |
0c3573f1 | 8451 | if (mddev->sysfs_action) |
00bcb4ac | 8452 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
72a23c21 | 8453 | } |
ac05f256 N |
8454 | unlock: |
8455 | wake_up(&mddev->sb_wait); | |
1da177e4 LT |
8456 | mddev_unlock(mddev); |
8457 | } | |
8458 | } | |
6c144d31 | 8459 | EXPORT_SYMBOL(md_check_recovery); |
1da177e4 | 8460 | |
a91d5ac0 JB |
8461 | void md_reap_sync_thread(struct mddev *mddev) |
8462 | { | |
8463 | struct md_rdev *rdev; | |
8464 | ||
8465 | /* resync has finished, collect result */ | |
8466 | md_unregister_thread(&mddev->sync_thread); | |
8467 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
8468 | !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
8469 | /* success...*/ | |
8470 | /* activate any spares */ | |
8471 | if (mddev->pers->spare_active(mddev)) { | |
8472 | sysfs_notify(&mddev->kobj, NULL, | |
8473 | "degraded"); | |
8474 | set_bit(MD_CHANGE_DEVS, &mddev->flags); | |
8475 | } | |
8476 | } | |
8477 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
8478 | mddev->pers->finish_reshape) | |
8479 | mddev->pers->finish_reshape(mddev); | |
8480 | ||
8481 | /* If array is no-longer degraded, then any saved_raid_disk | |
f466722c | 8482 | * information must be scrapped. |
a91d5ac0 | 8483 | */ |
f466722c N |
8484 | if (!mddev->degraded) |
8485 | rdev_for_each(rdev, mddev) | |
a91d5ac0 JB |
8486 | rdev->saved_raid_disk = -1; |
8487 | ||
8488 | md_update_sb(mddev, 1); | |
8489 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
ea358cd0 | 8490 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); |
a91d5ac0 JB |
8491 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
8492 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
8493 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
8494 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
f851b60d | 8495 | wake_up(&resync_wait); |
a91d5ac0 JB |
8496 | /* flag recovery needed just to double check */ |
8497 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8498 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8499 | md_new_event(mddev); | |
8500 | if (mddev->event_work.func) | |
8501 | queue_work(md_misc_wq, &mddev->event_work); | |
8502 | } | |
6c144d31 | 8503 | EXPORT_SYMBOL(md_reap_sync_thread); |
a91d5ac0 | 8504 | |
fd01b88c | 8505 | void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev) |
6bfe0b49 | 8506 | { |
00bcb4ac | 8507 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
6bfe0b49 | 8508 | wait_event_timeout(rdev->blocked_wait, |
de393cde N |
8509 | !test_bit(Blocked, &rdev->flags) && |
8510 | !test_bit(BlockedBadBlocks, &rdev->flags), | |
6bfe0b49 DW |
8511 | msecs_to_jiffies(5000)); |
8512 | rdev_dec_pending(rdev, mddev); | |
8513 | } | |
8514 | EXPORT_SYMBOL(md_wait_for_blocked_rdev); | |
8515 | ||
c6563a8c N |
8516 | void md_finish_reshape(struct mddev *mddev) |
8517 | { | |
8518 | /* called be personality module when reshape completes. */ | |
8519 | struct md_rdev *rdev; | |
8520 | ||
8521 | rdev_for_each(rdev, mddev) { | |
8522 | if (rdev->data_offset > rdev->new_data_offset) | |
8523 | rdev->sectors += rdev->data_offset - rdev->new_data_offset; | |
8524 | else | |
8525 | rdev->sectors -= rdev->new_data_offset - rdev->data_offset; | |
8526 | rdev->data_offset = rdev->new_data_offset; | |
8527 | } | |
8528 | } | |
8529 | EXPORT_SYMBOL(md_finish_reshape); | |
2230dfe4 | 8530 | |
fc974ee2 | 8531 | /* Bad block management */ |
2230dfe4 | 8532 | |
fc974ee2 | 8533 | /* Returns 1 on success, 0 on failure */ |
3cb03002 | 8534 | int rdev_set_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
c6563a8c | 8535 | int is_new) |
2230dfe4 | 8536 | { |
c6563a8c N |
8537 | int rv; |
8538 | if (is_new) | |
8539 | s += rdev->new_data_offset; | |
8540 | else | |
8541 | s += rdev->data_offset; | |
fc974ee2 VV |
8542 | rv = badblocks_set(&rdev->badblocks, s, sectors, 0); |
8543 | if (rv == 0) { | |
2230dfe4 | 8544 | /* Make sure they get written out promptly */ |
8bd2f0a0 | 8545 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
2230dfe4 | 8546 | set_bit(MD_CHANGE_CLEAN, &rdev->mddev->flags); |
55ce74d4 | 8547 | set_bit(MD_CHANGE_PENDING, &rdev->mddev->flags); |
2230dfe4 | 8548 | md_wakeup_thread(rdev->mddev->thread); |
fc974ee2 VV |
8549 | return 1; |
8550 | } else | |
8551 | return 0; | |
2230dfe4 N |
8552 | } |
8553 | EXPORT_SYMBOL_GPL(rdev_set_badblocks); | |
8554 | ||
c6563a8c N |
8555 | int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
8556 | int is_new) | |
2230dfe4 | 8557 | { |
c6563a8c N |
8558 | if (is_new) |
8559 | s += rdev->new_data_offset; | |
8560 | else | |
8561 | s += rdev->data_offset; | |
fc974ee2 | 8562 | return badblocks_clear(&rdev->badblocks, |
c6563a8c | 8563 | s, sectors); |
2230dfe4 N |
8564 | } |
8565 | EXPORT_SYMBOL_GPL(rdev_clear_badblocks); | |
8566 | ||
75c96f85 AB |
8567 | static int md_notify_reboot(struct notifier_block *this, |
8568 | unsigned long code, void *x) | |
1da177e4 LT |
8569 | { |
8570 | struct list_head *tmp; | |
fd01b88c | 8571 | struct mddev *mddev; |
2dba6a91 | 8572 | int need_delay = 0; |
1da177e4 | 8573 | |
c744a65c N |
8574 | for_each_mddev(mddev, tmp) { |
8575 | if (mddev_trylock(mddev)) { | |
30b8aa91 N |
8576 | if (mddev->pers) |
8577 | __md_stop_writes(mddev); | |
0f62fb22 N |
8578 | if (mddev->persistent) |
8579 | mddev->safemode = 2; | |
c744a65c | 8580 | mddev_unlock(mddev); |
2dba6a91 | 8581 | } |
c744a65c | 8582 | need_delay = 1; |
1da177e4 | 8583 | } |
c744a65c N |
8584 | /* |
8585 | * certain more exotic SCSI devices are known to be | |
8586 | * volatile wrt too early system reboots. While the | |
8587 | * right place to handle this issue is the given | |
8588 | * driver, we do want to have a safe RAID driver ... | |
8589 | */ | |
8590 | if (need_delay) | |
8591 | mdelay(1000*1); | |
8592 | ||
1da177e4 LT |
8593 | return NOTIFY_DONE; |
8594 | } | |
8595 | ||
75c96f85 | 8596 | static struct notifier_block md_notifier = { |
1da177e4 LT |
8597 | .notifier_call = md_notify_reboot, |
8598 | .next = NULL, | |
8599 | .priority = INT_MAX, /* before any real devices */ | |
8600 | }; | |
8601 | ||
8602 | static void md_geninit(void) | |
8603 | { | |
36a4e1fe | 8604 | pr_debug("md: sizeof(mdp_super_t) = %d\n", (int)sizeof(mdp_super_t)); |
1da177e4 | 8605 | |
c7705f34 | 8606 | proc_create("mdstat", S_IRUGO, NULL, &md_seq_fops); |
1da177e4 LT |
8607 | } |
8608 | ||
75c96f85 | 8609 | static int __init md_init(void) |
1da177e4 | 8610 | { |
e804ac78 TH |
8611 | int ret = -ENOMEM; |
8612 | ||
ada609ee | 8613 | md_wq = alloc_workqueue("md", WQ_MEM_RECLAIM, 0); |
e804ac78 TH |
8614 | if (!md_wq) |
8615 | goto err_wq; | |
8616 | ||
8617 | md_misc_wq = alloc_workqueue("md_misc", 0, 0); | |
8618 | if (!md_misc_wq) | |
8619 | goto err_misc_wq; | |
8620 | ||
8621 | if ((ret = register_blkdev(MD_MAJOR, "md")) < 0) | |
8622 | goto err_md; | |
8623 | ||
8624 | if ((ret = register_blkdev(0, "mdp")) < 0) | |
8625 | goto err_mdp; | |
8626 | mdp_major = ret; | |
8627 | ||
af5628f0 | 8628 | blk_register_region(MKDEV(MD_MAJOR, 0), 512, THIS_MODULE, |
e8703fe1 N |
8629 | md_probe, NULL, NULL); |
8630 | blk_register_region(MKDEV(mdp_major, 0), 1UL<<MINORBITS, THIS_MODULE, | |
1da177e4 LT |
8631 | md_probe, NULL, NULL); |
8632 | ||
1da177e4 | 8633 | register_reboot_notifier(&md_notifier); |
0b4d4147 | 8634 | raid_table_header = register_sysctl_table(raid_root_table); |
1da177e4 LT |
8635 | |
8636 | md_geninit(); | |
d710e138 | 8637 | return 0; |
1da177e4 | 8638 | |
e804ac78 TH |
8639 | err_mdp: |
8640 | unregister_blkdev(MD_MAJOR, "md"); | |
8641 | err_md: | |
8642 | destroy_workqueue(md_misc_wq); | |
8643 | err_misc_wq: | |
8644 | destroy_workqueue(md_wq); | |
8645 | err_wq: | |
8646 | return ret; | |
8647 | } | |
1da177e4 | 8648 | |
70bcecdb | 8649 | static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev) |
1d7e3e96 | 8650 | { |
70bcecdb GR |
8651 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
8652 | struct md_rdev *rdev2; | |
8653 | int role, ret; | |
8654 | char b[BDEVNAME_SIZE]; | |
1d7e3e96 | 8655 | |
70bcecdb GR |
8656 | /* Check for change of roles in the active devices */ |
8657 | rdev_for_each(rdev2, mddev) { | |
8658 | if (test_bit(Faulty, &rdev2->flags)) | |
8659 | continue; | |
8660 | ||
8661 | /* Check if the roles changed */ | |
8662 | role = le16_to_cpu(sb->dev_roles[rdev2->desc_nr]); | |
dbb64f86 GR |
8663 | |
8664 | if (test_bit(Candidate, &rdev2->flags)) { | |
8665 | if (role == 0xfffe) { | |
8666 | pr_info("md: Removing Candidate device %s because add failed\n", bdevname(rdev2->bdev,b)); | |
8667 | md_kick_rdev_from_array(rdev2); | |
8668 | continue; | |
8669 | } | |
8670 | else | |
8671 | clear_bit(Candidate, &rdev2->flags); | |
8672 | } | |
8673 | ||
70bcecdb GR |
8674 | if (role != rdev2->raid_disk) { |
8675 | /* got activated */ | |
8676 | if (rdev2->raid_disk == -1 && role != 0xffff) { | |
8677 | rdev2->saved_raid_disk = role; | |
8678 | ret = remove_and_add_spares(mddev, rdev2); | |
8679 | pr_info("Activated spare: %s\n", | |
8680 | bdevname(rdev2->bdev,b)); | |
70bcecdb GR |
8681 | } |
8682 | /* device faulty | |
8683 | * We just want to do the minimum to mark the disk | |
8684 | * as faulty. The recovery is performed by the | |
8685 | * one who initiated the error. | |
8686 | */ | |
8687 | if ((role == 0xfffe) || (role == 0xfffd)) { | |
8688 | md_error(mddev, rdev2); | |
8689 | clear_bit(Blocked, &rdev2->flags); | |
8690 | } | |
8691 | } | |
1d7e3e96 | 8692 | } |
70bcecdb | 8693 | |
28c1b9fd GR |
8694 | if (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) |
8695 | update_raid_disks(mddev, le32_to_cpu(sb->raid_disks)); | |
70bcecdb GR |
8696 | |
8697 | /* Finally set the event to be up to date */ | |
8698 | mddev->events = le64_to_cpu(sb->events); | |
8699 | } | |
8700 | ||
8701 | static int read_rdev(struct mddev *mddev, struct md_rdev *rdev) | |
8702 | { | |
8703 | int err; | |
8704 | struct page *swapout = rdev->sb_page; | |
8705 | struct mdp_superblock_1 *sb; | |
8706 | ||
8707 | /* Store the sb page of the rdev in the swapout temporary | |
8708 | * variable in case we err in the future | |
8709 | */ | |
8710 | rdev->sb_page = NULL; | |
8711 | alloc_disk_sb(rdev); | |
8712 | ClearPageUptodate(rdev->sb_page); | |
8713 | rdev->sb_loaded = 0; | |
8714 | err = super_types[mddev->major_version].load_super(rdev, NULL, mddev->minor_version); | |
8715 | ||
8716 | if (err < 0) { | |
8717 | pr_warn("%s: %d Could not reload rdev(%d) err: %d. Restoring old values\n", | |
8718 | __func__, __LINE__, rdev->desc_nr, err); | |
8719 | put_page(rdev->sb_page); | |
8720 | rdev->sb_page = swapout; | |
8721 | rdev->sb_loaded = 1; | |
8722 | return err; | |
1d7e3e96 GR |
8723 | } |
8724 | ||
70bcecdb GR |
8725 | sb = page_address(rdev->sb_page); |
8726 | /* Read the offset unconditionally, even if MD_FEATURE_RECOVERY_OFFSET | |
8727 | * is not set | |
8728 | */ | |
8729 | ||
8730 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)) | |
8731 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); | |
8732 | ||
8733 | /* The other node finished recovery, call spare_active to set | |
8734 | * device In_sync and mddev->degraded | |
8735 | */ | |
8736 | if (rdev->recovery_offset == MaxSector && | |
8737 | !test_bit(In_sync, &rdev->flags) && | |
8738 | mddev->pers->spare_active(mddev)) | |
8739 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
8740 | ||
8741 | put_page(swapout); | |
8742 | return 0; | |
8743 | } | |
8744 | ||
8745 | void md_reload_sb(struct mddev *mddev, int nr) | |
8746 | { | |
8747 | struct md_rdev *rdev; | |
8748 | int err; | |
8749 | ||
8750 | /* Find the rdev */ | |
8751 | rdev_for_each_rcu(rdev, mddev) { | |
8752 | if (rdev->desc_nr == nr) | |
8753 | break; | |
8754 | } | |
8755 | ||
8756 | if (!rdev || rdev->desc_nr != nr) { | |
8757 | pr_warn("%s: %d Could not find rdev with nr %d\n", __func__, __LINE__, nr); | |
8758 | return; | |
8759 | } | |
8760 | ||
8761 | err = read_rdev(mddev, rdev); | |
8762 | if (err < 0) | |
8763 | return; | |
8764 | ||
8765 | check_sb_changes(mddev, rdev); | |
8766 | ||
8767 | /* Read all rdev's to update recovery_offset */ | |
8768 | rdev_for_each_rcu(rdev, mddev) | |
8769 | read_rdev(mddev, rdev); | |
1d7e3e96 GR |
8770 | } |
8771 | EXPORT_SYMBOL(md_reload_sb); | |
8772 | ||
1da177e4 LT |
8773 | #ifndef MODULE |
8774 | ||
8775 | /* | |
8776 | * Searches all registered partitions for autorun RAID arrays | |
8777 | * at boot time. | |
8778 | */ | |
4d936ec1 ME |
8779 | |
8780 | static LIST_HEAD(all_detected_devices); | |
8781 | struct detected_devices_node { | |
8782 | struct list_head list; | |
8783 | dev_t dev; | |
8784 | }; | |
1da177e4 LT |
8785 | |
8786 | void md_autodetect_dev(dev_t dev) | |
8787 | { | |
4d936ec1 ME |
8788 | struct detected_devices_node *node_detected_dev; |
8789 | ||
8790 | node_detected_dev = kzalloc(sizeof(*node_detected_dev), GFP_KERNEL); | |
8791 | if (node_detected_dev) { | |
8792 | node_detected_dev->dev = dev; | |
8793 | list_add_tail(&node_detected_dev->list, &all_detected_devices); | |
8794 | } else { | |
8795 | printk(KERN_CRIT "md: md_autodetect_dev: kzalloc failed" | |
8796 | ", skipping dev(%d,%d)\n", MAJOR(dev), MINOR(dev)); | |
8797 | } | |
1da177e4 LT |
8798 | } |
8799 | ||
1da177e4 LT |
8800 | static void autostart_arrays(int part) |
8801 | { | |
3cb03002 | 8802 | struct md_rdev *rdev; |
4d936ec1 ME |
8803 | struct detected_devices_node *node_detected_dev; |
8804 | dev_t dev; | |
8805 | int i_scanned, i_passed; | |
1da177e4 | 8806 | |
4d936ec1 ME |
8807 | i_scanned = 0; |
8808 | i_passed = 0; | |
1da177e4 | 8809 | |
4d936ec1 | 8810 | printk(KERN_INFO "md: Autodetecting RAID arrays.\n"); |
1da177e4 | 8811 | |
4d936ec1 ME |
8812 | while (!list_empty(&all_detected_devices) && i_scanned < INT_MAX) { |
8813 | i_scanned++; | |
8814 | node_detected_dev = list_entry(all_detected_devices.next, | |
8815 | struct detected_devices_node, list); | |
8816 | list_del(&node_detected_dev->list); | |
8817 | dev = node_detected_dev->dev; | |
8818 | kfree(node_detected_dev); | |
df968c4e | 8819 | rdev = md_import_device(dev,0, 90); |
1da177e4 LT |
8820 | if (IS_ERR(rdev)) |
8821 | continue; | |
8822 | ||
403df478 | 8823 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 8824 | continue; |
403df478 | 8825 | |
d0fae18f | 8826 | set_bit(AutoDetected, &rdev->flags); |
1da177e4 | 8827 | list_add(&rdev->same_set, &pending_raid_disks); |
4d936ec1 | 8828 | i_passed++; |
1da177e4 | 8829 | } |
4d936ec1 ME |
8830 | |
8831 | printk(KERN_INFO "md: Scanned %d and added %d devices.\n", | |
8832 | i_scanned, i_passed); | |
1da177e4 LT |
8833 | |
8834 | autorun_devices(part); | |
8835 | } | |
8836 | ||
fdee8ae4 | 8837 | #endif /* !MODULE */ |
1da177e4 LT |
8838 | |
8839 | static __exit void md_exit(void) | |
8840 | { | |
fd01b88c | 8841 | struct mddev *mddev; |
1da177e4 | 8842 | struct list_head *tmp; |
e2f23b60 | 8843 | int delay = 1; |
8ab5e4c1 | 8844 | |
af5628f0 | 8845 | blk_unregister_region(MKDEV(MD_MAJOR,0), 512); |
e8703fe1 | 8846 | blk_unregister_region(MKDEV(mdp_major,0), 1U << MINORBITS); |
1da177e4 | 8847 | |
3dbd8c2e | 8848 | unregister_blkdev(MD_MAJOR,"md"); |
1da177e4 LT |
8849 | unregister_blkdev(mdp_major, "mdp"); |
8850 | unregister_reboot_notifier(&md_notifier); | |
8851 | unregister_sysctl_table(raid_table_header); | |
e2f23b60 N |
8852 | |
8853 | /* We cannot unload the modules while some process is | |
8854 | * waiting for us in select() or poll() - wake them up | |
8855 | */ | |
8856 | md_unloading = 1; | |
8857 | while (waitqueue_active(&md_event_waiters)) { | |
8858 | /* not safe to leave yet */ | |
8859 | wake_up(&md_event_waiters); | |
8860 | msleep(delay); | |
8861 | delay += delay; | |
8862 | } | |
1da177e4 | 8863 | remove_proc_entry("mdstat", NULL); |
e2f23b60 | 8864 | |
29ac4aa3 | 8865 | for_each_mddev(mddev, tmp) { |
1da177e4 | 8866 | export_array(mddev); |
d3374825 | 8867 | mddev->hold_active = 0; |
1da177e4 | 8868 | } |
e804ac78 TH |
8869 | destroy_workqueue(md_misc_wq); |
8870 | destroy_workqueue(md_wq); | |
1da177e4 LT |
8871 | } |
8872 | ||
685784aa | 8873 | subsys_initcall(md_init); |
1da177e4 LT |
8874 | module_exit(md_exit) |
8875 | ||
f91de92e N |
8876 | static int get_ro(char *buffer, struct kernel_param *kp) |
8877 | { | |
8878 | return sprintf(buffer, "%d", start_readonly); | |
8879 | } | |
8880 | static int set_ro(const char *val, struct kernel_param *kp) | |
8881 | { | |
4c9309c0 | 8882 | return kstrtouint(val, 10, (unsigned int *)&start_readonly); |
f91de92e N |
8883 | } |
8884 | ||
80ca3a44 N |
8885 | module_param_call(start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR); |
8886 | module_param(start_dirty_degraded, int, S_IRUGO|S_IWUSR); | |
efeb53c0 | 8887 | module_param_call(new_array, add_named_array, NULL, NULL, S_IWUSR); |
f91de92e | 8888 | |
1da177e4 | 8889 | MODULE_LICENSE("GPL"); |
0efb9e61 | 8890 | MODULE_DESCRIPTION("MD RAID framework"); |
aa1595e9 | 8891 | MODULE_ALIAS("md"); |
72008652 | 8892 | MODULE_ALIAS_BLOCKDEV_MAJOR(MD_MAJOR); |