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. | |
9d48739e N |
33 | |
34 | Errors, Warnings, etc. | |
35 | Please use: | |
36 | pr_crit() for error conditions that risk data loss | |
37 | pr_err() for error conditions that are unexpected, like an IO error | |
38 | or internal inconsistency | |
39 | pr_warn() for error conditions that could have been predicated, like | |
40 | adding a device to an array when it has incompatible metadata | |
41 | pr_info() for every interesting, very rare events, like an array starting | |
42 | or stopping, or resync starting or stopping | |
43 | pr_debug() for everything else. | |
44 | ||
1da177e4 LT |
45 | */ |
46 | ||
a6fb0934 | 47 | #include <linux/kthread.h> |
bff61975 | 48 | #include <linux/blkdev.h> |
fc974ee2 | 49 | #include <linux/badblocks.h> |
1da177e4 | 50 | #include <linux/sysctl.h> |
bff61975 | 51 | #include <linux/seq_file.h> |
ff01bb48 | 52 | #include <linux/fs.h> |
d7603b7e | 53 | #include <linux/poll.h> |
16f17b39 | 54 | #include <linux/ctype.h> |
e7d2860b | 55 | #include <linux/string.h> |
fb4d8c76 N |
56 | #include <linux/hdreg.h> |
57 | #include <linux/proc_fs.h> | |
58 | #include <linux/random.h> | |
056075c7 | 59 | #include <linux/module.h> |
fb4d8c76 | 60 | #include <linux/reboot.h> |
32a7627c | 61 | #include <linux/file.h> |
aa98aa31 | 62 | #include <linux/compat.h> |
25570727 | 63 | #include <linux/delay.h> |
bff61975 N |
64 | #include <linux/raid/md_p.h> |
65 | #include <linux/raid/md_u.h> | |
5a0e3ad6 | 66 | #include <linux/slab.h> |
504634f6 | 67 | #include <trace/events/block.h> |
43b2e5d8 | 68 | #include "md.h" |
ef740c37 | 69 | #include "bitmap.h" |
edb39c9d | 70 | #include "md-cluster.h" |
1da177e4 | 71 | |
1da177e4 | 72 | #ifndef MODULE |
d710e138 | 73 | static void autostart_arrays(int part); |
1da177e4 LT |
74 | #endif |
75 | ||
01f96c0a N |
76 | /* pers_list is a list of registered personalities protected |
77 | * by pers_lock. | |
78 | * pers_lock does extra service to protect accesses to | |
79 | * mddev->thread when the mutex cannot be held. | |
80 | */ | |
2604b703 | 81 | static LIST_HEAD(pers_list); |
1da177e4 LT |
82 | static DEFINE_SPINLOCK(pers_lock); |
83 | ||
edb39c9d | 84 | struct md_cluster_operations *md_cluster_ops; |
589a1c49 | 85 | EXPORT_SYMBOL(md_cluster_ops); |
edb39c9d GR |
86 | struct module *md_cluster_mod; |
87 | EXPORT_SYMBOL(md_cluster_mod); | |
88 | ||
90b08710 | 89 | static DECLARE_WAIT_QUEUE_HEAD(resync_wait); |
e804ac78 TH |
90 | static struct workqueue_struct *md_wq; |
91 | static struct workqueue_struct *md_misc_wq; | |
90b08710 | 92 | |
746d3207 N |
93 | static int remove_and_add_spares(struct mddev *mddev, |
94 | struct md_rdev *this); | |
5aa61f42 | 95 | static void mddev_detach(struct mddev *mddev); |
746d3207 | 96 | |
1e50915f RB |
97 | /* |
98 | * Default number of read corrections we'll attempt on an rdev | |
99 | * before ejecting it from the array. We divide the read error | |
100 | * count by 2 for every hour elapsed between read errors. | |
101 | */ | |
102 | #define MD_DEFAULT_MAX_CORRECTED_READ_ERRORS 20 | |
1da177e4 LT |
103 | /* |
104 | * Current RAID-1,4,5 parallel reconstruction 'guaranteed speed limit' | |
105 | * is 1000 KB/sec, so the extra system load does not show up that much. | |
106 | * Increase it if you want to have more _guaranteed_ speed. Note that | |
338cec32 | 107 | * the RAID driver will use the maximum available bandwidth if the IO |
1da177e4 LT |
108 | * subsystem is idle. There is also an 'absolute maximum' reconstruction |
109 | * speed limit - in case reconstruction slows down your system despite | |
110 | * idle IO detection. | |
111 | * | |
112 | * you can change it via /proc/sys/dev/raid/speed_limit_min and _max. | |
88202a0c | 113 | * or /sys/block/mdX/md/sync_speed_{min,max} |
1da177e4 LT |
114 | */ |
115 | ||
116 | static int sysctl_speed_limit_min = 1000; | |
117 | static int sysctl_speed_limit_max = 200000; | |
fd01b88c | 118 | static inline int speed_min(struct mddev *mddev) |
88202a0c N |
119 | { |
120 | return mddev->sync_speed_min ? | |
121 | mddev->sync_speed_min : sysctl_speed_limit_min; | |
122 | } | |
123 | ||
fd01b88c | 124 | static inline int speed_max(struct mddev *mddev) |
88202a0c N |
125 | { |
126 | return mddev->sync_speed_max ? | |
127 | mddev->sync_speed_max : sysctl_speed_limit_max; | |
128 | } | |
1da177e4 LT |
129 | |
130 | static struct ctl_table_header *raid_table_header; | |
131 | ||
82592c38 | 132 | static struct ctl_table raid_table[] = { |
1da177e4 | 133 | { |
1da177e4 LT |
134 | .procname = "speed_limit_min", |
135 | .data = &sysctl_speed_limit_min, | |
136 | .maxlen = sizeof(int), | |
80ca3a44 | 137 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 138 | .proc_handler = proc_dointvec, |
1da177e4 LT |
139 | }, |
140 | { | |
1da177e4 LT |
141 | .procname = "speed_limit_max", |
142 | .data = &sysctl_speed_limit_max, | |
143 | .maxlen = sizeof(int), | |
80ca3a44 | 144 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 145 | .proc_handler = proc_dointvec, |
1da177e4 | 146 | }, |
894d2491 | 147 | { } |
1da177e4 LT |
148 | }; |
149 | ||
82592c38 | 150 | static struct ctl_table raid_dir_table[] = { |
1da177e4 | 151 | { |
1da177e4 LT |
152 | .procname = "raid", |
153 | .maxlen = 0, | |
80ca3a44 | 154 | .mode = S_IRUGO|S_IXUGO, |
1da177e4 LT |
155 | .child = raid_table, |
156 | }, | |
894d2491 | 157 | { } |
1da177e4 LT |
158 | }; |
159 | ||
82592c38 | 160 | static struct ctl_table raid_root_table[] = { |
1da177e4 | 161 | { |
1da177e4 LT |
162 | .procname = "dev", |
163 | .maxlen = 0, | |
164 | .mode = 0555, | |
165 | .child = raid_dir_table, | |
166 | }, | |
894d2491 | 167 | { } |
1da177e4 LT |
168 | }; |
169 | ||
83d5cde4 | 170 | static const struct block_device_operations md_fops; |
1da177e4 | 171 | |
f91de92e N |
172 | static int start_readonly; |
173 | ||
a167f663 N |
174 | /* bio_clone_mddev |
175 | * like bio_clone, but with a local bio set | |
176 | */ | |
177 | ||
a167f663 | 178 | struct bio *bio_alloc_mddev(gfp_t gfp_mask, int nr_iovecs, |
fd01b88c | 179 | struct mddev *mddev) |
a167f663 N |
180 | { |
181 | struct bio *b; | |
a167f663 N |
182 | |
183 | if (!mddev || !mddev->bio_set) | |
184 | return bio_alloc(gfp_mask, nr_iovecs); | |
185 | ||
395c72a7 | 186 | b = bio_alloc_bioset(gfp_mask, nr_iovecs, mddev->bio_set); |
a167f663 N |
187 | if (!b) |
188 | return NULL; | |
a167f663 N |
189 | return b; |
190 | } | |
191 | EXPORT_SYMBOL_GPL(bio_alloc_mddev); | |
192 | ||
193 | struct bio *bio_clone_mddev(struct bio *bio, gfp_t gfp_mask, | |
fd01b88c | 194 | struct mddev *mddev) |
a167f663 | 195 | { |
a167f663 N |
196 | if (!mddev || !mddev->bio_set) |
197 | return bio_clone(bio, gfp_mask); | |
198 | ||
bf800ef1 | 199 | return bio_clone_bioset(bio, gfp_mask, mddev->bio_set); |
a167f663 N |
200 | } |
201 | EXPORT_SYMBOL_GPL(bio_clone_mddev); | |
202 | ||
d7603b7e N |
203 | /* |
204 | * We have a system wide 'event count' that is incremented | |
205 | * on any 'interesting' event, and readers of /proc/mdstat | |
206 | * can use 'poll' or 'select' to find out when the event | |
207 | * count increases. | |
208 | * | |
209 | * Events are: | |
210 | * start array, stop array, error, add device, remove device, | |
211 | * start build, activate spare | |
212 | */ | |
2989ddbd | 213 | static DECLARE_WAIT_QUEUE_HEAD(md_event_waiters); |
d7603b7e | 214 | static atomic_t md_event_count; |
fd01b88c | 215 | void md_new_event(struct mddev *mddev) |
d7603b7e N |
216 | { |
217 | atomic_inc(&md_event_count); | |
218 | wake_up(&md_event_waiters); | |
219 | } | |
29269553 | 220 | EXPORT_SYMBOL_GPL(md_new_event); |
d7603b7e | 221 | |
1da177e4 LT |
222 | /* |
223 | * Enables to iterate over all existing md arrays | |
224 | * all_mddevs_lock protects this list. | |
225 | */ | |
226 | static LIST_HEAD(all_mddevs); | |
227 | static DEFINE_SPINLOCK(all_mddevs_lock); | |
228 | ||
1da177e4 LT |
229 | /* |
230 | * iterates through all used mddevs in the system. | |
231 | * We take care to grab the all_mddevs_lock whenever navigating | |
232 | * the list, and to always hold a refcount when unlocked. | |
233 | * Any code which breaks out of this loop while own | |
234 | * a reference to the current mddev and must mddev_put it. | |
235 | */ | |
fd01b88c | 236 | #define for_each_mddev(_mddev,_tmp) \ |
1da177e4 | 237 | \ |
f72ffdd6 | 238 | for (({ spin_lock(&all_mddevs_lock); \ |
fd01b88c N |
239 | _tmp = all_mddevs.next; \ |
240 | _mddev = NULL;}); \ | |
241 | ({ if (_tmp != &all_mddevs) \ | |
242 | mddev_get(list_entry(_tmp, struct mddev, all_mddevs));\ | |
1da177e4 | 243 | spin_unlock(&all_mddevs_lock); \ |
fd01b88c N |
244 | if (_mddev) mddev_put(_mddev); \ |
245 | _mddev = list_entry(_tmp, struct mddev, all_mddevs); \ | |
246 | _tmp != &all_mddevs;}); \ | |
1da177e4 | 247 | ({ spin_lock(&all_mddevs_lock); \ |
fd01b88c | 248 | _tmp = _tmp->next;}) \ |
1da177e4 LT |
249 | ) |
250 | ||
409c57f3 N |
251 | /* Rather than calling directly into the personality make_request function, |
252 | * IO requests come here first so that we can check if the device is | |
253 | * being suspended pending a reconfiguration. | |
254 | * We hold a refcount over the call to ->make_request. By the time that | |
255 | * call has finished, the bio has been linked into some internal structure | |
256 | * and so is visible to ->quiesce(), so we don't need the refcount any more. | |
257 | */ | |
dece1635 | 258 | static blk_qc_t md_make_request(struct request_queue *q, struct bio *bio) |
1da177e4 | 259 | { |
49077326 | 260 | const int rw = bio_data_dir(bio); |
fd01b88c | 261 | struct mddev *mddev = q->queuedata; |
e91ece55 | 262 | unsigned int sectors; |
74672d06 | 263 | int cpu; |
49077326 | 264 | |
54efd50b KO |
265 | blk_queue_split(q, &bio, q->bio_split); |
266 | ||
274d8cbd | 267 | if (mddev == NULL || mddev->pers == NULL) { |
409c57f3 | 268 | bio_io_error(bio); |
dece1635 | 269 | return BLK_QC_T_NONE; |
409c57f3 | 270 | } |
bbfa57c0 | 271 | if (mddev->ro == 1 && unlikely(rw == WRITE)) { |
4246a0b6 CH |
272 | if (bio_sectors(bio) != 0) |
273 | bio->bi_error = -EROFS; | |
274 | bio_endio(bio); | |
dece1635 | 275 | return BLK_QC_T_NONE; |
bbfa57c0 | 276 | } |
0ca69886 | 277 | smp_rmb(); /* Ensure implications of 'active' are visible */ |
409c57f3 | 278 | rcu_read_lock(); |
e9c7469b | 279 | if (mddev->suspended) { |
409c57f3 N |
280 | DEFINE_WAIT(__wait); |
281 | for (;;) { | |
282 | prepare_to_wait(&mddev->sb_wait, &__wait, | |
283 | TASK_UNINTERRUPTIBLE); | |
e9c7469b | 284 | if (!mddev->suspended) |
409c57f3 N |
285 | break; |
286 | rcu_read_unlock(); | |
287 | schedule(); | |
288 | rcu_read_lock(); | |
289 | } | |
290 | finish_wait(&mddev->sb_wait, &__wait); | |
291 | } | |
292 | atomic_inc(&mddev->active_io); | |
293 | rcu_read_unlock(); | |
49077326 | 294 | |
e91ece55 CM |
295 | /* |
296 | * save the sectors now since our bio can | |
297 | * go away inside make_request | |
298 | */ | |
299 | sectors = bio_sectors(bio); | |
9c573de3 | 300 | /* bio could be mergeable after passing to underlayer */ |
1eff9d32 | 301 | bio->bi_opf &= ~REQ_NOMERGE; |
5a7bbad2 | 302 | mddev->pers->make_request(mddev, bio); |
49077326 | 303 | |
74672d06 GZ |
304 | cpu = part_stat_lock(); |
305 | part_stat_inc(cpu, &mddev->gendisk->part0, ios[rw]); | |
306 | part_stat_add(cpu, &mddev->gendisk->part0, sectors[rw], sectors); | |
307 | part_stat_unlock(); | |
49077326 | 308 | |
409c57f3 N |
309 | if (atomic_dec_and_test(&mddev->active_io) && mddev->suspended) |
310 | wake_up(&mddev->sb_wait); | |
dece1635 JA |
311 | |
312 | return BLK_QC_T_NONE; | |
409c57f3 N |
313 | } |
314 | ||
9e35b99c N |
315 | /* mddev_suspend makes sure no new requests are submitted |
316 | * to the device, and that any requests that have been submitted | |
317 | * are completely handled. | |
afa0f557 N |
318 | * Once mddev_detach() is called and completes, the module will be |
319 | * completely unused. | |
9e35b99c | 320 | */ |
fd01b88c | 321 | void mddev_suspend(struct mddev *mddev) |
409c57f3 | 322 | { |
092398dc | 323 | WARN_ON_ONCE(mddev->thread && current == mddev->thread->tsk); |
0dc10e50 MP |
324 | if (mddev->suspended++) |
325 | return; | |
409c57f3 N |
326 | synchronize_rcu(); |
327 | wait_event(mddev->sb_wait, atomic_read(&mddev->active_io) == 0); | |
328 | mddev->pers->quiesce(mddev, 1); | |
0d9f4f13 JB |
329 | |
330 | del_timer_sync(&mddev->safemode_timer); | |
409c57f3 | 331 | } |
390ee602 | 332 | EXPORT_SYMBOL_GPL(mddev_suspend); |
409c57f3 | 333 | |
fd01b88c | 334 | void mddev_resume(struct mddev *mddev) |
409c57f3 | 335 | { |
0dc10e50 MP |
336 | if (--mddev->suspended) |
337 | return; | |
409c57f3 N |
338 | wake_up(&mddev->sb_wait); |
339 | mddev->pers->quiesce(mddev, 0); | |
0fd018af | 340 | |
47525e59 | 341 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
0fd018af JB |
342 | md_wakeup_thread(mddev->thread); |
343 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
1da177e4 | 344 | } |
390ee602 | 345 | EXPORT_SYMBOL_GPL(mddev_resume); |
1da177e4 | 346 | |
fd01b88c | 347 | int mddev_congested(struct mddev *mddev, int bits) |
3fa841d7 | 348 | { |
5c675f83 N |
349 | struct md_personality *pers = mddev->pers; |
350 | int ret = 0; | |
351 | ||
352 | rcu_read_lock(); | |
353 | if (mddev->suspended) | |
354 | ret = 1; | |
355 | else if (pers && pers->congested) | |
356 | ret = pers->congested(mddev, bits); | |
357 | rcu_read_unlock(); | |
358 | return ret; | |
359 | } | |
360 | EXPORT_SYMBOL_GPL(mddev_congested); | |
361 | static int md_congested(void *data, int bits) | |
362 | { | |
363 | struct mddev *mddev = data; | |
364 | return mddev_congested(mddev, bits); | |
3fa841d7 | 365 | } |
3fa841d7 | 366 | |
a2826aa9 | 367 | /* |
e9c7469b | 368 | * Generic flush handling for md |
a2826aa9 N |
369 | */ |
370 | ||
4246a0b6 | 371 | static void md_end_flush(struct bio *bio) |
a2826aa9 | 372 | { |
3cb03002 | 373 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 374 | struct mddev *mddev = rdev->mddev; |
a2826aa9 N |
375 | |
376 | rdev_dec_pending(rdev, mddev); | |
377 | ||
378 | if (atomic_dec_and_test(&mddev->flush_pending)) { | |
e9c7469b | 379 | /* The pre-request flush has finished */ |
e804ac78 | 380 | queue_work(md_wq, &mddev->flush_work); |
a2826aa9 N |
381 | } |
382 | bio_put(bio); | |
383 | } | |
384 | ||
a7a07e69 N |
385 | static void md_submit_flush_data(struct work_struct *ws); |
386 | ||
a035fc3e | 387 | static void submit_flushes(struct work_struct *ws) |
a2826aa9 | 388 | { |
fd01b88c | 389 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); |
3cb03002 | 390 | struct md_rdev *rdev; |
a2826aa9 | 391 | |
a7a07e69 N |
392 | INIT_WORK(&mddev->flush_work, md_submit_flush_data); |
393 | atomic_set(&mddev->flush_pending, 1); | |
a2826aa9 | 394 | rcu_read_lock(); |
dafb20fa | 395 | rdev_for_each_rcu(rdev, mddev) |
a2826aa9 N |
396 | if (rdev->raid_disk >= 0 && |
397 | !test_bit(Faulty, &rdev->flags)) { | |
398 | /* Take two references, one is dropped | |
399 | * when request finishes, one after | |
400 | * we reclaim rcu_read_lock | |
401 | */ | |
402 | struct bio *bi; | |
403 | atomic_inc(&rdev->nr_pending); | |
404 | atomic_inc(&rdev->nr_pending); | |
405 | rcu_read_unlock(); | |
b5e1b8ce | 406 | bi = bio_alloc_mddev(GFP_NOIO, 0, mddev); |
e9c7469b | 407 | bi->bi_end_io = md_end_flush; |
a2826aa9 N |
408 | bi->bi_private = rdev; |
409 | bi->bi_bdev = rdev->bdev; | |
70fd7614 | 410 | bi->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH; |
a2826aa9 | 411 | atomic_inc(&mddev->flush_pending); |
4e49ea4a | 412 | submit_bio(bi); |
a2826aa9 N |
413 | rcu_read_lock(); |
414 | rdev_dec_pending(rdev, mddev); | |
415 | } | |
416 | rcu_read_unlock(); | |
a7a07e69 N |
417 | if (atomic_dec_and_test(&mddev->flush_pending)) |
418 | queue_work(md_wq, &mddev->flush_work); | |
a2826aa9 N |
419 | } |
420 | ||
e9c7469b | 421 | static void md_submit_flush_data(struct work_struct *ws) |
a2826aa9 | 422 | { |
fd01b88c | 423 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); |
e9c7469b | 424 | struct bio *bio = mddev->flush_bio; |
a2826aa9 | 425 | |
4f024f37 | 426 | if (bio->bi_iter.bi_size == 0) |
a2826aa9 | 427 | /* an empty barrier - all done */ |
4246a0b6 | 428 | bio_endio(bio); |
a2826aa9 | 429 | else { |
1eff9d32 | 430 | bio->bi_opf &= ~REQ_PREFLUSH; |
5a7bbad2 | 431 | mddev->pers->make_request(mddev, bio); |
a2826aa9 | 432 | } |
2b74e12e N |
433 | |
434 | mddev->flush_bio = NULL; | |
435 | wake_up(&mddev->sb_wait); | |
a2826aa9 N |
436 | } |
437 | ||
fd01b88c | 438 | void md_flush_request(struct mddev *mddev, struct bio *bio) |
a2826aa9 | 439 | { |
85572d7c | 440 | spin_lock_irq(&mddev->lock); |
a2826aa9 | 441 | wait_event_lock_irq(mddev->sb_wait, |
e9c7469b | 442 | !mddev->flush_bio, |
85572d7c | 443 | mddev->lock); |
e9c7469b | 444 | mddev->flush_bio = bio; |
85572d7c | 445 | spin_unlock_irq(&mddev->lock); |
a2826aa9 | 446 | |
a035fc3e N |
447 | INIT_WORK(&mddev->flush_work, submit_flushes); |
448 | queue_work(md_wq, &mddev->flush_work); | |
a2826aa9 | 449 | } |
e9c7469b | 450 | EXPORT_SYMBOL(md_flush_request); |
409c57f3 | 451 | |
74018dc3 | 452 | void md_unplug(struct blk_plug_cb *cb, bool from_schedule) |
97658cdd | 453 | { |
9cbb1750 N |
454 | struct mddev *mddev = cb->data; |
455 | md_wakeup_thread(mddev->thread); | |
456 | kfree(cb); | |
97658cdd | 457 | } |
9cbb1750 | 458 | EXPORT_SYMBOL(md_unplug); |
2ac87401 | 459 | |
fd01b88c | 460 | static inline struct mddev *mddev_get(struct mddev *mddev) |
1da177e4 LT |
461 | { |
462 | atomic_inc(&mddev->active); | |
463 | return mddev; | |
464 | } | |
465 | ||
5fd3a17e | 466 | static void mddev_delayed_delete(struct work_struct *ws); |
d3374825 | 467 | |
fd01b88c | 468 | static void mddev_put(struct mddev *mddev) |
1da177e4 | 469 | { |
a167f663 N |
470 | struct bio_set *bs = NULL; |
471 | ||
1da177e4 LT |
472 | if (!atomic_dec_and_lock(&mddev->active, &all_mddevs_lock)) |
473 | return; | |
d3374825 | 474 | if (!mddev->raid_disks && list_empty(&mddev->disks) && |
cbd19983 N |
475 | mddev->ctime == 0 && !mddev->hold_active) { |
476 | /* Array is not configured at all, and not held active, | |
477 | * so destroy it */ | |
af8a2434 | 478 | list_del_init(&mddev->all_mddevs); |
a167f663 N |
479 | bs = mddev->bio_set; |
480 | mddev->bio_set = NULL; | |
d3374825 | 481 | if (mddev->gendisk) { |
e804ac78 TH |
482 | /* We did a probe so need to clean up. Call |
483 | * queue_work inside the spinlock so that | |
484 | * flush_workqueue() after mddev_find will | |
485 | * succeed in waiting for the work to be done. | |
d3374825 N |
486 | */ |
487 | INIT_WORK(&mddev->del_work, mddev_delayed_delete); | |
e804ac78 | 488 | queue_work(md_misc_wq, &mddev->del_work); |
d3374825 N |
489 | } else |
490 | kfree(mddev); | |
491 | } | |
492 | spin_unlock(&all_mddevs_lock); | |
a167f663 N |
493 | if (bs) |
494 | bioset_free(bs); | |
1da177e4 LT |
495 | } |
496 | ||
25b2edfa SL |
497 | static void md_safemode_timeout(unsigned long data); |
498 | ||
fd01b88c | 499 | void mddev_init(struct mddev *mddev) |
fafd7fb0 N |
500 | { |
501 | mutex_init(&mddev->open_mutex); | |
502 | mutex_init(&mddev->reconfig_mutex); | |
503 | mutex_init(&mddev->bitmap_info.mutex); | |
504 | INIT_LIST_HEAD(&mddev->disks); | |
505 | INIT_LIST_HEAD(&mddev->all_mddevs); | |
25b2edfa SL |
506 | setup_timer(&mddev->safemode_timer, md_safemode_timeout, |
507 | (unsigned long) mddev); | |
fafd7fb0 N |
508 | atomic_set(&mddev->active, 1); |
509 | atomic_set(&mddev->openers, 0); | |
510 | atomic_set(&mddev->active_io, 0); | |
85572d7c | 511 | spin_lock_init(&mddev->lock); |
fafd7fb0 N |
512 | atomic_set(&mddev->flush_pending, 0); |
513 | init_waitqueue_head(&mddev->sb_wait); | |
514 | init_waitqueue_head(&mddev->recovery_wait); | |
515 | mddev->reshape_position = MaxSector; | |
2c810cdd | 516 | mddev->reshape_backwards = 0; |
c4a39551 | 517 | mddev->last_sync_action = "none"; |
fafd7fb0 N |
518 | mddev->resync_min = 0; |
519 | mddev->resync_max = MaxSector; | |
520 | mddev->level = LEVEL_NONE; | |
521 | } | |
390ee602 | 522 | EXPORT_SYMBOL_GPL(mddev_init); |
fafd7fb0 | 523 | |
f72ffdd6 | 524 | static struct mddev *mddev_find(dev_t unit) |
1da177e4 | 525 | { |
fd01b88c | 526 | struct mddev *mddev, *new = NULL; |
1da177e4 | 527 | |
8f5f02c4 N |
528 | if (unit && MAJOR(unit) != MD_MAJOR) |
529 | unit &= ~((1<<MdpMinorShift)-1); | |
530 | ||
1da177e4 LT |
531 | retry: |
532 | spin_lock(&all_mddevs_lock); | |
efeb53c0 N |
533 | |
534 | if (unit) { | |
535 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
536 | if (mddev->unit == unit) { | |
537 | mddev_get(mddev); | |
538 | spin_unlock(&all_mddevs_lock); | |
539 | kfree(new); | |
540 | return mddev; | |
541 | } | |
542 | ||
543 | if (new) { | |
544 | list_add(&new->all_mddevs, &all_mddevs); | |
1da177e4 | 545 | spin_unlock(&all_mddevs_lock); |
efeb53c0 N |
546 | new->hold_active = UNTIL_IOCTL; |
547 | return new; | |
1da177e4 | 548 | } |
efeb53c0 N |
549 | } else if (new) { |
550 | /* find an unused unit number */ | |
551 | static int next_minor = 512; | |
552 | int start = next_minor; | |
553 | int is_free = 0; | |
554 | int dev = 0; | |
555 | while (!is_free) { | |
556 | dev = MKDEV(MD_MAJOR, next_minor); | |
557 | next_minor++; | |
558 | if (next_minor > MINORMASK) | |
559 | next_minor = 0; | |
560 | if (next_minor == start) { | |
561 | /* Oh dear, all in use. */ | |
562 | spin_unlock(&all_mddevs_lock); | |
563 | kfree(new); | |
564 | return NULL; | |
565 | } | |
f72ffdd6 | 566 | |
efeb53c0 N |
567 | is_free = 1; |
568 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
569 | if (mddev->unit == dev) { | |
570 | is_free = 0; | |
571 | break; | |
572 | } | |
573 | } | |
574 | new->unit = dev; | |
575 | new->md_minor = MINOR(dev); | |
576 | new->hold_active = UNTIL_STOP; | |
1da177e4 LT |
577 | list_add(&new->all_mddevs, &all_mddevs); |
578 | spin_unlock(&all_mddevs_lock); | |
579 | return new; | |
580 | } | |
581 | spin_unlock(&all_mddevs_lock); | |
582 | ||
9ffae0cf | 583 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
1da177e4 LT |
584 | if (!new) |
585 | return NULL; | |
586 | ||
1da177e4 LT |
587 | new->unit = unit; |
588 | if (MAJOR(unit) == MD_MAJOR) | |
589 | new->md_minor = MINOR(unit); | |
590 | else | |
591 | new->md_minor = MINOR(unit) >> MdpMinorShift; | |
592 | ||
fafd7fb0 | 593 | mddev_init(new); |
1da177e4 | 594 | |
1da177e4 LT |
595 | goto retry; |
596 | } | |
597 | ||
b6eb127d N |
598 | static struct attribute_group md_redundancy_group; |
599 | ||
5c47daf6 | 600 | void mddev_unlock(struct mddev *mddev) |
1da177e4 | 601 | { |
a64c876f | 602 | if (mddev->to_remove) { |
b6eb127d N |
603 | /* These cannot be removed under reconfig_mutex as |
604 | * an access to the files will try to take reconfig_mutex | |
605 | * while holding the file unremovable, which leads to | |
606 | * a deadlock. | |
bb4f1e9d N |
607 | * So hold set sysfs_active while the remove in happeing, |
608 | * and anything else which might set ->to_remove or my | |
609 | * otherwise change the sysfs namespace will fail with | |
610 | * -EBUSY if sysfs_active is still set. | |
611 | * We set sysfs_active under reconfig_mutex and elsewhere | |
612 | * test it under the same mutex to ensure its correct value | |
613 | * is seen. | |
b6eb127d | 614 | */ |
a64c876f N |
615 | struct attribute_group *to_remove = mddev->to_remove; |
616 | mddev->to_remove = NULL; | |
bb4f1e9d | 617 | mddev->sysfs_active = 1; |
b6eb127d N |
618 | mutex_unlock(&mddev->reconfig_mutex); |
619 | ||
00bcb4ac N |
620 | if (mddev->kobj.sd) { |
621 | if (to_remove != &md_redundancy_group) | |
622 | sysfs_remove_group(&mddev->kobj, to_remove); | |
623 | if (mddev->pers == NULL || | |
624 | mddev->pers->sync_request == NULL) { | |
625 | sysfs_remove_group(&mddev->kobj, &md_redundancy_group); | |
626 | if (mddev->sysfs_action) | |
627 | sysfs_put(mddev->sysfs_action); | |
628 | mddev->sysfs_action = NULL; | |
629 | } | |
a64c876f | 630 | } |
bb4f1e9d | 631 | mddev->sysfs_active = 0; |
b6eb127d N |
632 | } else |
633 | mutex_unlock(&mddev->reconfig_mutex); | |
1da177e4 | 634 | |
751e67ca CD |
635 | /* As we've dropped the mutex we need a spinlock to |
636 | * make sure the thread doesn't disappear | |
01f96c0a N |
637 | */ |
638 | spin_lock(&pers_lock); | |
005eca5e | 639 | md_wakeup_thread(mddev->thread); |
01f96c0a | 640 | spin_unlock(&pers_lock); |
1da177e4 | 641 | } |
5c47daf6 | 642 | EXPORT_SYMBOL_GPL(mddev_unlock); |
1da177e4 | 643 | |
57d051dc | 644 | struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr) |
1ca69c4b N |
645 | { |
646 | struct md_rdev *rdev; | |
647 | ||
648 | rdev_for_each_rcu(rdev, mddev) | |
649 | if (rdev->desc_nr == nr) | |
650 | return rdev; | |
651 | ||
652 | return NULL; | |
653 | } | |
57d051dc | 654 | EXPORT_SYMBOL_GPL(md_find_rdev_nr_rcu); |
1ca69c4b N |
655 | |
656 | static struct md_rdev *find_rdev(struct mddev *mddev, dev_t dev) | |
1da177e4 | 657 | { |
3cb03002 | 658 | struct md_rdev *rdev; |
1da177e4 | 659 | |
dafb20fa | 660 | rdev_for_each(rdev, mddev) |
1da177e4 LT |
661 | if (rdev->bdev->bd_dev == dev) |
662 | return rdev; | |
159ec1fc | 663 | |
1da177e4 LT |
664 | return NULL; |
665 | } | |
666 | ||
1ca69c4b N |
667 | static struct md_rdev *find_rdev_rcu(struct mddev *mddev, dev_t dev) |
668 | { | |
669 | struct md_rdev *rdev; | |
670 | ||
671 | rdev_for_each_rcu(rdev, mddev) | |
672 | if (rdev->bdev->bd_dev == dev) | |
673 | return rdev; | |
674 | ||
675 | return NULL; | |
676 | } | |
677 | ||
84fc4b56 | 678 | static struct md_personality *find_pers(int level, char *clevel) |
2604b703 | 679 | { |
84fc4b56 | 680 | struct md_personality *pers; |
d9d166c2 N |
681 | list_for_each_entry(pers, &pers_list, list) { |
682 | if (level != LEVEL_NONE && pers->level == level) | |
2604b703 | 683 | return pers; |
d9d166c2 N |
684 | if (strcmp(pers->name, clevel)==0) |
685 | return pers; | |
686 | } | |
2604b703 N |
687 | return NULL; |
688 | } | |
689 | ||
b73df2d3 | 690 | /* return the offset of the super block in 512byte sectors */ |
3cb03002 | 691 | static inline sector_t calc_dev_sboffset(struct md_rdev *rdev) |
1da177e4 | 692 | { |
57b2caa3 | 693 | sector_t num_sectors = i_size_read(rdev->bdev->bd_inode) / 512; |
b73df2d3 | 694 | return MD_NEW_SIZE_SECTORS(num_sectors); |
1da177e4 LT |
695 | } |
696 | ||
f72ffdd6 | 697 | static int alloc_disk_sb(struct md_rdev *rdev) |
1da177e4 | 698 | { |
1da177e4 | 699 | rdev->sb_page = alloc_page(GFP_KERNEL); |
7f0f0d87 | 700 | if (!rdev->sb_page) |
ebc24337 | 701 | return -ENOMEM; |
1da177e4 LT |
702 | return 0; |
703 | } | |
704 | ||
545c8795 | 705 | void md_rdev_clear(struct md_rdev *rdev) |
1da177e4 LT |
706 | { |
707 | if (rdev->sb_page) { | |
2d1f3b5d | 708 | put_page(rdev->sb_page); |
1da177e4 LT |
709 | rdev->sb_loaded = 0; |
710 | rdev->sb_page = NULL; | |
0f420358 | 711 | rdev->sb_start = 0; |
dd8ac336 | 712 | rdev->sectors = 0; |
1da177e4 | 713 | } |
2699b672 N |
714 | if (rdev->bb_page) { |
715 | put_page(rdev->bb_page); | |
716 | rdev->bb_page = NULL; | |
717 | } | |
d3b407fb | 718 | badblocks_exit(&rdev->badblocks); |
1da177e4 | 719 | } |
545c8795 | 720 | EXPORT_SYMBOL_GPL(md_rdev_clear); |
1da177e4 | 721 | |
4246a0b6 | 722 | static void super_written(struct bio *bio) |
7bfa19f2 | 723 | { |
3cb03002 | 724 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 725 | struct mddev *mddev = rdev->mddev; |
7bfa19f2 | 726 | |
4246a0b6 | 727 | if (bio->bi_error) { |
9d48739e | 728 | pr_err("md: super_written gets error=%d\n", bio->bi_error); |
a9701a30 | 729 | md_error(mddev, rdev); |
46533ff7 N |
730 | if (!test_bit(Faulty, &rdev->flags) |
731 | && (bio->bi_opf & MD_FAILFAST)) { | |
2953079c | 732 | set_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags); |
46533ff7 N |
733 | set_bit(LastDev, &rdev->flags); |
734 | } | |
735 | } else | |
736 | clear_bit(LastDev, &rdev->flags); | |
7bfa19f2 | 737 | |
a9701a30 N |
738 | if (atomic_dec_and_test(&mddev->pending_writes)) |
739 | wake_up(&mddev->sb_wait); | |
ed3b98c7 | 740 | rdev_dec_pending(rdev, mddev); |
f8b58edf | 741 | bio_put(bio); |
7bfa19f2 N |
742 | } |
743 | ||
fd01b88c | 744 | void md_super_write(struct mddev *mddev, struct md_rdev *rdev, |
7bfa19f2 N |
745 | sector_t sector, int size, struct page *page) |
746 | { | |
747 | /* write first size bytes of page to sector of rdev | |
748 | * Increment mddev->pending_writes before returning | |
749 | * and decrement it on completion, waking up sb_wait | |
750 | * if zero is reached. | |
751 | * If an error occurred, call md_error | |
752 | */ | |
46533ff7 N |
753 | struct bio *bio; |
754 | int ff = 0; | |
755 | ||
756 | if (test_bit(Faulty, &rdev->flags)) | |
757 | return; | |
758 | ||
759 | bio = bio_alloc_mddev(GFP_NOIO, 1, mddev); | |
7bfa19f2 | 760 | |
ed3b98c7 SL |
761 | atomic_inc(&rdev->nr_pending); |
762 | ||
a6ff7e08 | 763 | bio->bi_bdev = rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev; |
4f024f37 | 764 | bio->bi_iter.bi_sector = sector; |
7bfa19f2 N |
765 | bio_add_page(bio, page, size, 0); |
766 | bio->bi_private = rdev; | |
767 | bio->bi_end_io = super_written; | |
46533ff7 N |
768 | |
769 | if (test_bit(MD_FAILFAST_SUPPORTED, &mddev->flags) && | |
770 | test_bit(FailFast, &rdev->flags) && | |
771 | !test_bit(LastDev, &rdev->flags)) | |
772 | ff = MD_FAILFAST; | |
20737738 | 773 | bio->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH | REQ_FUA | ff; |
a9701a30 | 774 | |
7bfa19f2 | 775 | atomic_inc(&mddev->pending_writes); |
4e49ea4a | 776 | submit_bio(bio); |
a9701a30 N |
777 | } |
778 | ||
46533ff7 | 779 | int md_super_wait(struct mddev *mddev) |
a9701a30 | 780 | { |
e9c7469b | 781 | /* wait for all superblock writes that were scheduled to complete */ |
1967cd56 | 782 | wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0); |
2953079c | 783 | if (test_and_clear_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags)) |
46533ff7 N |
784 | return -EAGAIN; |
785 | return 0; | |
7bfa19f2 N |
786 | } |
787 | ||
3cb03002 | 788 | int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, |
796a5cf0 | 789 | struct page *page, int op, int op_flags, bool metadata_op) |
1da177e4 | 790 | { |
a167f663 | 791 | struct bio *bio = bio_alloc_mddev(GFP_NOIO, 1, rdev->mddev); |
1da177e4 LT |
792 | int ret; |
793 | ||
a6ff7e08 JB |
794 | bio->bi_bdev = (metadata_op && rdev->meta_bdev) ? |
795 | rdev->meta_bdev : rdev->bdev; | |
796a5cf0 | 796 | bio_set_op_attrs(bio, op, op_flags); |
ccebd4c4 | 797 | if (metadata_op) |
4f024f37 | 798 | bio->bi_iter.bi_sector = sector + rdev->sb_start; |
1fdd6fc9 N |
799 | else if (rdev->mddev->reshape_position != MaxSector && |
800 | (rdev->mddev->reshape_backwards == | |
801 | (sector >= rdev->mddev->reshape_position))) | |
4f024f37 | 802 | bio->bi_iter.bi_sector = sector + rdev->new_data_offset; |
ccebd4c4 | 803 | else |
4f024f37 | 804 | bio->bi_iter.bi_sector = sector + rdev->data_offset; |
1da177e4 | 805 | bio_add_page(bio, page, size, 0); |
4e49ea4a MC |
806 | |
807 | submit_bio_wait(bio); | |
1da177e4 | 808 | |
4246a0b6 | 809 | ret = !bio->bi_error; |
1da177e4 LT |
810 | bio_put(bio); |
811 | return ret; | |
812 | } | |
a8745db2 | 813 | EXPORT_SYMBOL_GPL(sync_page_io); |
1da177e4 | 814 | |
f72ffdd6 | 815 | static int read_disk_sb(struct md_rdev *rdev, int size) |
1da177e4 LT |
816 | { |
817 | char b[BDEVNAME_SIZE]; | |
403df478 | 818 | |
1da177e4 LT |
819 | if (rdev->sb_loaded) |
820 | return 0; | |
821 | ||
796a5cf0 | 822 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, REQ_OP_READ, 0, true)) |
1da177e4 LT |
823 | goto fail; |
824 | rdev->sb_loaded = 1; | |
825 | return 0; | |
826 | ||
827 | fail: | |
9d48739e N |
828 | pr_err("md: disabled device %s, could not read superblock.\n", |
829 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
830 | return -EINVAL; |
831 | } | |
832 | ||
833 | static int uuid_equal(mdp_super_t *sb1, mdp_super_t *sb2) | |
834 | { | |
f72ffdd6 | 835 | return sb1->set_uuid0 == sb2->set_uuid0 && |
05710466 AN |
836 | sb1->set_uuid1 == sb2->set_uuid1 && |
837 | sb1->set_uuid2 == sb2->set_uuid2 && | |
838 | sb1->set_uuid3 == sb2->set_uuid3; | |
1da177e4 LT |
839 | } |
840 | ||
1da177e4 LT |
841 | static int sb_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
842 | { | |
843 | int ret; | |
844 | mdp_super_t *tmp1, *tmp2; | |
845 | ||
846 | tmp1 = kmalloc(sizeof(*tmp1),GFP_KERNEL); | |
847 | tmp2 = kmalloc(sizeof(*tmp2),GFP_KERNEL); | |
848 | ||
849 | if (!tmp1 || !tmp2) { | |
850 | ret = 0; | |
1da177e4 LT |
851 | goto abort; |
852 | } | |
853 | ||
854 | *tmp1 = *sb1; | |
855 | *tmp2 = *sb2; | |
856 | ||
857 | /* | |
858 | * nr_disks is not constant | |
859 | */ | |
860 | tmp1->nr_disks = 0; | |
861 | tmp2->nr_disks = 0; | |
862 | ||
ce0c8e05 | 863 | ret = (memcmp(tmp1, tmp2, MD_SB_GENERIC_CONSTANT_WORDS * 4) == 0); |
1da177e4 | 864 | abort: |
990a8baf JJ |
865 | kfree(tmp1); |
866 | kfree(tmp2); | |
1da177e4 LT |
867 | return ret; |
868 | } | |
869 | ||
4d167f09 N |
870 | static u32 md_csum_fold(u32 csum) |
871 | { | |
872 | csum = (csum & 0xffff) + (csum >> 16); | |
873 | return (csum & 0xffff) + (csum >> 16); | |
874 | } | |
875 | ||
f72ffdd6 | 876 | static unsigned int calc_sb_csum(mdp_super_t *sb) |
1da177e4 | 877 | { |
4d167f09 N |
878 | u64 newcsum = 0; |
879 | u32 *sb32 = (u32*)sb; | |
880 | int i; | |
1da177e4 LT |
881 | unsigned int disk_csum, csum; |
882 | ||
883 | disk_csum = sb->sb_csum; | |
884 | sb->sb_csum = 0; | |
4d167f09 N |
885 | |
886 | for (i = 0; i < MD_SB_BYTES/4 ; i++) | |
887 | newcsum += sb32[i]; | |
888 | csum = (newcsum & 0xffffffff) + (newcsum>>32); | |
889 | ||
4d167f09 N |
890 | #ifdef CONFIG_ALPHA |
891 | /* This used to use csum_partial, which was wrong for several | |
892 | * reasons including that different results are returned on | |
893 | * different architectures. It isn't critical that we get exactly | |
894 | * the same return value as before (we always csum_fold before | |
895 | * testing, and that removes any differences). However as we | |
896 | * know that csum_partial always returned a 16bit value on | |
897 | * alphas, do a fold to maximise conformity to previous behaviour. | |
898 | */ | |
899 | sb->sb_csum = md_csum_fold(disk_csum); | |
900 | #else | |
1da177e4 | 901 | sb->sb_csum = disk_csum; |
4d167f09 | 902 | #endif |
1da177e4 LT |
903 | return csum; |
904 | } | |
905 | ||
1da177e4 LT |
906 | /* |
907 | * Handle superblock details. | |
908 | * We want to be able to handle multiple superblock formats | |
909 | * so we have a common interface to them all, and an array of | |
910 | * different handlers. | |
911 | * We rely on user-space to write the initial superblock, and support | |
912 | * reading and updating of superblocks. | |
913 | * Interface methods are: | |
3cb03002 | 914 | * int load_super(struct md_rdev *dev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
915 | * loads and validates a superblock on dev. |
916 | * if refdev != NULL, compare superblocks on both devices | |
917 | * Return: | |
918 | * 0 - dev has a superblock that is compatible with refdev | |
919 | * 1 - dev has a superblock that is compatible and newer than refdev | |
920 | * so dev should be used as the refdev in future | |
921 | * -EINVAL superblock incompatible or invalid | |
922 | * -othererror e.g. -EIO | |
923 | * | |
fd01b88c | 924 | * int validate_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
925 | * Verify that dev is acceptable into mddev. |
926 | * The first time, mddev->raid_disks will be 0, and data from | |
927 | * dev should be merged in. Subsequent calls check that dev | |
928 | * is new enough. Return 0 or -EINVAL | |
929 | * | |
fd01b88c | 930 | * void sync_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
931 | * Update the superblock for rdev with data in mddev |
932 | * This does not write to disc. | |
933 | * | |
934 | */ | |
935 | ||
936 | struct super_type { | |
0cd17fec CW |
937 | char *name; |
938 | struct module *owner; | |
c6563a8c N |
939 | int (*load_super)(struct md_rdev *rdev, |
940 | struct md_rdev *refdev, | |
0cd17fec | 941 | int minor_version); |
c6563a8c N |
942 | int (*validate_super)(struct mddev *mddev, |
943 | struct md_rdev *rdev); | |
944 | void (*sync_super)(struct mddev *mddev, | |
945 | struct md_rdev *rdev); | |
3cb03002 | 946 | unsigned long long (*rdev_size_change)(struct md_rdev *rdev, |
15f4a5fd | 947 | sector_t num_sectors); |
c6563a8c N |
948 | int (*allow_new_offset)(struct md_rdev *rdev, |
949 | unsigned long long new_offset); | |
1da177e4 LT |
950 | }; |
951 | ||
0894cc30 AN |
952 | /* |
953 | * Check that the given mddev has no bitmap. | |
954 | * | |
955 | * This function is called from the run method of all personalities that do not | |
956 | * support bitmaps. It prints an error message and returns non-zero if mddev | |
957 | * has a bitmap. Otherwise, it returns 0. | |
958 | * | |
959 | */ | |
fd01b88c | 960 | int md_check_no_bitmap(struct mddev *mddev) |
0894cc30 | 961 | { |
c3d9714e | 962 | if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset) |
0894cc30 | 963 | return 0; |
9d48739e | 964 | pr_warn("%s: bitmaps are not supported for %s\n", |
0894cc30 AN |
965 | mdname(mddev), mddev->pers->name); |
966 | return 1; | |
967 | } | |
968 | EXPORT_SYMBOL(md_check_no_bitmap); | |
969 | ||
1da177e4 | 970 | /* |
f72ffdd6 | 971 | * load_super for 0.90.0 |
1da177e4 | 972 | */ |
3cb03002 | 973 | static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
974 | { |
975 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
976 | mdp_super_t *sb; | |
977 | int ret; | |
1da177e4 LT |
978 | |
979 | /* | |
0f420358 | 980 | * Calculate the position of the superblock (512byte sectors), |
1da177e4 LT |
981 | * it's at the end of the disk. |
982 | * | |
983 | * It also happens to be a multiple of 4Kb. | |
984 | */ | |
57b2caa3 | 985 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 986 | |
0002b271 | 987 | ret = read_disk_sb(rdev, MD_SB_BYTES); |
9d48739e N |
988 | if (ret) |
989 | return ret; | |
1da177e4 LT |
990 | |
991 | ret = -EINVAL; | |
992 | ||
993 | bdevname(rdev->bdev, b); | |
65a06f06 | 994 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
995 | |
996 | if (sb->md_magic != MD_SB_MAGIC) { | |
9d48739e | 997 | pr_warn("md: invalid raid superblock magic on %s\n", b); |
1da177e4 LT |
998 | goto abort; |
999 | } | |
1000 | ||
1001 | if (sb->major_version != 0 || | |
f6705578 N |
1002 | sb->minor_version < 90 || |
1003 | sb->minor_version > 91) { | |
9d48739e N |
1004 | pr_warn("Bad version number %d.%d on %s\n", |
1005 | sb->major_version, sb->minor_version, b); | |
1da177e4 LT |
1006 | goto abort; |
1007 | } | |
1008 | ||
1009 | if (sb->raid_disks <= 0) | |
1010 | goto abort; | |
1011 | ||
4d167f09 | 1012 | if (md_csum_fold(calc_sb_csum(sb)) != md_csum_fold(sb->sb_csum)) { |
9d48739e | 1013 | pr_warn("md: invalid superblock checksum on %s\n", b); |
1da177e4 LT |
1014 | goto abort; |
1015 | } | |
1016 | ||
1017 | rdev->preferred_minor = sb->md_minor; | |
1018 | rdev->data_offset = 0; | |
c6563a8c | 1019 | rdev->new_data_offset = 0; |
0002b271 | 1020 | rdev->sb_size = MD_SB_BYTES; |
9f2f3830 | 1021 | rdev->badblocks.shift = -1; |
1da177e4 LT |
1022 | |
1023 | if (sb->level == LEVEL_MULTIPATH) | |
1024 | rdev->desc_nr = -1; | |
1025 | else | |
1026 | rdev->desc_nr = sb->this_disk.number; | |
1027 | ||
9a7b2b0f | 1028 | if (!refdev) { |
1da177e4 | 1029 | ret = 1; |
9a7b2b0f | 1030 | } else { |
1da177e4 | 1031 | __u64 ev1, ev2; |
65a06f06 | 1032 | mdp_super_t *refsb = page_address(refdev->sb_page); |
1da177e4 | 1033 | if (!uuid_equal(refsb, sb)) { |
9d48739e | 1034 | pr_warn("md: %s has different UUID to %s\n", |
1da177e4 LT |
1035 | b, bdevname(refdev->bdev,b2)); |
1036 | goto abort; | |
1037 | } | |
1038 | if (!sb_equal(refsb, sb)) { | |
9d48739e N |
1039 | pr_warn("md: %s has same UUID but different superblock to %s\n", |
1040 | b, bdevname(refdev->bdev, b2)); | |
1da177e4 LT |
1041 | goto abort; |
1042 | } | |
1043 | ev1 = md_event(sb); | |
1044 | ev2 = md_event(refsb); | |
1045 | if (ev1 > ev2) | |
1046 | ret = 1; | |
f72ffdd6 | 1047 | else |
1da177e4 LT |
1048 | ret = 0; |
1049 | } | |
8190e754 | 1050 | rdev->sectors = rdev->sb_start; |
667a5313 N |
1051 | /* Limit to 4TB as metadata cannot record more than that. |
1052 | * (not needed for Linear and RAID0 as metadata doesn't | |
1053 | * record this size) | |
1054 | */ | |
3312c951 AB |
1055 | if (IS_ENABLED(CONFIG_LBDAF) && (u64)rdev->sectors >= (2ULL << 32) && |
1056 | sb->level >= 1) | |
1057 | rdev->sectors = (sector_t)(2ULL << 32) - 2; | |
1da177e4 | 1058 | |
27a7b260 | 1059 | if (rdev->sectors < ((sector_t)sb->size) * 2 && sb->level >= 1) |
2bf071bf N |
1060 | /* "this cannot possibly happen" ... */ |
1061 | ret = -EINVAL; | |
1062 | ||
1da177e4 LT |
1063 | abort: |
1064 | return ret; | |
1065 | } | |
1066 | ||
1067 | /* | |
1068 | * validate_super for 0.90.0 | |
1069 | */ | |
fd01b88c | 1070 | static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1071 | { |
1072 | mdp_disk_t *desc; | |
65a06f06 | 1073 | mdp_super_t *sb = page_address(rdev->sb_page); |
07d84d10 | 1074 | __u64 ev1 = md_event(sb); |
1da177e4 | 1075 | |
41158c7e | 1076 | rdev->raid_disk = -1; |
c5d79adb N |
1077 | clear_bit(Faulty, &rdev->flags); |
1078 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1079 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1080 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1081 | |
1da177e4 LT |
1082 | if (mddev->raid_disks == 0) { |
1083 | mddev->major_version = 0; | |
1084 | mddev->minor_version = sb->minor_version; | |
1085 | mddev->patch_version = sb->patch_version; | |
e691063a | 1086 | mddev->external = 0; |
9d8f0363 | 1087 | mddev->chunk_sectors = sb->chunk_size >> 9; |
1da177e4 LT |
1088 | mddev->ctime = sb->ctime; |
1089 | mddev->utime = sb->utime; | |
1090 | mddev->level = sb->level; | |
d9d166c2 | 1091 | mddev->clevel[0] = 0; |
1da177e4 LT |
1092 | mddev->layout = sb->layout; |
1093 | mddev->raid_disks = sb->raid_disks; | |
27a7b260 | 1094 | mddev->dev_sectors = ((sector_t)sb->size) * 2; |
07d84d10 | 1095 | mddev->events = ev1; |
c3d9714e | 1096 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1097 | mddev->bitmap_info.space = 0; |
1098 | /* bitmap can use 60 K after the 4K superblocks */ | |
c3d9714e | 1099 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 1100 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
2c810cdd | 1101 | mddev->reshape_backwards = 0; |
1da177e4 | 1102 | |
f6705578 N |
1103 | if (mddev->minor_version >= 91) { |
1104 | mddev->reshape_position = sb->reshape_position; | |
1105 | mddev->delta_disks = sb->delta_disks; | |
1106 | mddev->new_level = sb->new_level; | |
1107 | mddev->new_layout = sb->new_layout; | |
664e7c41 | 1108 | mddev->new_chunk_sectors = sb->new_chunk >> 9; |
2c810cdd N |
1109 | if (mddev->delta_disks < 0) |
1110 | mddev->reshape_backwards = 1; | |
f6705578 N |
1111 | } else { |
1112 | mddev->reshape_position = MaxSector; | |
1113 | mddev->delta_disks = 0; | |
1114 | mddev->new_level = mddev->level; | |
1115 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1116 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1117 | } |
1118 | ||
1da177e4 LT |
1119 | if (sb->state & (1<<MD_SB_CLEAN)) |
1120 | mddev->recovery_cp = MaxSector; | |
1121 | else { | |
f72ffdd6 | 1122 | if (sb->events_hi == sb->cp_events_hi && |
1da177e4 LT |
1123 | sb->events_lo == sb->cp_events_lo) { |
1124 | mddev->recovery_cp = sb->recovery_cp; | |
1125 | } else | |
1126 | mddev->recovery_cp = 0; | |
1127 | } | |
1128 | ||
1129 | memcpy(mddev->uuid+0, &sb->set_uuid0, 4); | |
1130 | memcpy(mddev->uuid+4, &sb->set_uuid1, 4); | |
1131 | memcpy(mddev->uuid+8, &sb->set_uuid2, 4); | |
1132 | memcpy(mddev->uuid+12,&sb->set_uuid3, 4); | |
1133 | ||
1134 | mddev->max_disks = MD_SB_DISKS; | |
a654b9d8 N |
1135 | |
1136 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT) && | |
6409bb05 | 1137 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1138 | mddev->bitmap_info.offset = |
1139 | mddev->bitmap_info.default_offset; | |
6409bb05 | 1140 | mddev->bitmap_info.space = |
c9ad020f | 1141 | mddev->bitmap_info.default_space; |
6409bb05 | 1142 | } |
a654b9d8 | 1143 | |
41158c7e | 1144 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1145 | /* Insist on good event counter while assembling, except |
1146 | * for spares (which don't need an event count) */ | |
1da177e4 | 1147 | ++ev1; |
be6800a7 N |
1148 | if (sb->disks[rdev->desc_nr].state & ( |
1149 | (1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE))) | |
f72ffdd6 | 1150 | if (ev1 < mddev->events) |
be6800a7 | 1151 | return -EINVAL; |
41158c7e N |
1152 | } else if (mddev->bitmap) { |
1153 | /* if adding to array with a bitmap, then we can accept an | |
1154 | * older device ... but not too old. | |
1155 | */ | |
41158c7e N |
1156 | if (ev1 < mddev->bitmap->events_cleared) |
1157 | return 0; | |
8313b8e5 N |
1158 | if (ev1 < mddev->events) |
1159 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1160 | } else { |
1161 | if (ev1 < mddev->events) | |
1162 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1163 | return 0; | |
1164 | } | |
41158c7e | 1165 | |
1da177e4 | 1166 | if (mddev->level != LEVEL_MULTIPATH) { |
1da177e4 LT |
1167 | desc = sb->disks + rdev->desc_nr; |
1168 | ||
1169 | if (desc->state & (1<<MD_DISK_FAULTY)) | |
b2d444d7 | 1170 | set_bit(Faulty, &rdev->flags); |
7c7546cc N |
1171 | else if (desc->state & (1<<MD_DISK_SYNC) /* && |
1172 | desc->raid_disk < mddev->raid_disks */) { | |
b2d444d7 | 1173 | set_bit(In_sync, &rdev->flags); |
1da177e4 | 1174 | rdev->raid_disk = desc->raid_disk; |
f466722c | 1175 | rdev->saved_raid_disk = desc->raid_disk; |
0261cd9f N |
1176 | } else if (desc->state & (1<<MD_DISK_ACTIVE)) { |
1177 | /* active but not in sync implies recovery up to | |
1178 | * reshape position. We don't know exactly where | |
1179 | * that is, so set to zero for now */ | |
1180 | if (mddev->minor_version >= 91) { | |
1181 | rdev->recovery_offset = 0; | |
1182 | rdev->raid_disk = desc->raid_disk; | |
1183 | } | |
1da177e4 | 1184 | } |
8ddf9efe N |
1185 | if (desc->state & (1<<MD_DISK_WRITEMOSTLY)) |
1186 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1187 | if (desc->state & (1<<MD_DISK_FAILFAST)) |
1188 | set_bit(FailFast, &rdev->flags); | |
41158c7e | 1189 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1190 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1191 | return 0; |
1192 | } | |
1193 | ||
1194 | /* | |
1195 | * sync_super for 0.90.0 | |
1196 | */ | |
fd01b88c | 1197 | static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1198 | { |
1199 | mdp_super_t *sb; | |
3cb03002 | 1200 | struct md_rdev *rdev2; |
1da177e4 | 1201 | int next_spare = mddev->raid_disks; |
19133a42 | 1202 | |
1da177e4 LT |
1203 | /* make rdev->sb match mddev data.. |
1204 | * | |
1205 | * 1/ zero out disks | |
1206 | * 2/ Add info for each disk, keeping track of highest desc_nr (next_spare); | |
1207 | * 3/ any empty disks < next_spare become removed | |
1208 | * | |
1209 | * disks[0] gets initialised to REMOVED because | |
1210 | * we cannot be sure from other fields if it has | |
1211 | * been initialised or not. | |
1212 | */ | |
1213 | int i; | |
1214 | int active=0, working=0,failed=0,spare=0,nr_disks=0; | |
1215 | ||
61181565 N |
1216 | rdev->sb_size = MD_SB_BYTES; |
1217 | ||
65a06f06 | 1218 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1219 | |
1220 | memset(sb, 0, sizeof(*sb)); | |
1221 | ||
1222 | sb->md_magic = MD_SB_MAGIC; | |
1223 | sb->major_version = mddev->major_version; | |
1da177e4 LT |
1224 | sb->patch_version = mddev->patch_version; |
1225 | sb->gvalid_words = 0; /* ignored */ | |
1226 | memcpy(&sb->set_uuid0, mddev->uuid+0, 4); | |
1227 | memcpy(&sb->set_uuid1, mddev->uuid+4, 4); | |
1228 | memcpy(&sb->set_uuid2, mddev->uuid+8, 4); | |
1229 | memcpy(&sb->set_uuid3, mddev->uuid+12,4); | |
1230 | ||
9ebc6ef1 | 1231 | sb->ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 1232 | sb->level = mddev->level; |
58c0fed4 | 1233 | sb->size = mddev->dev_sectors / 2; |
1da177e4 LT |
1234 | sb->raid_disks = mddev->raid_disks; |
1235 | sb->md_minor = mddev->md_minor; | |
e691063a | 1236 | sb->not_persistent = 0; |
9ebc6ef1 | 1237 | sb->utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
1238 | sb->state = 0; |
1239 | sb->events_hi = (mddev->events>>32); | |
1240 | sb->events_lo = (u32)mddev->events; | |
1241 | ||
f6705578 N |
1242 | if (mddev->reshape_position == MaxSector) |
1243 | sb->minor_version = 90; | |
1244 | else { | |
1245 | sb->minor_version = 91; | |
1246 | sb->reshape_position = mddev->reshape_position; | |
1247 | sb->new_level = mddev->new_level; | |
1248 | sb->delta_disks = mddev->delta_disks; | |
1249 | sb->new_layout = mddev->new_layout; | |
664e7c41 | 1250 | sb->new_chunk = mddev->new_chunk_sectors << 9; |
f6705578 N |
1251 | } |
1252 | mddev->minor_version = sb->minor_version; | |
1da177e4 LT |
1253 | if (mddev->in_sync) |
1254 | { | |
1255 | sb->recovery_cp = mddev->recovery_cp; | |
1256 | sb->cp_events_hi = (mddev->events>>32); | |
1257 | sb->cp_events_lo = (u32)mddev->events; | |
1258 | if (mddev->recovery_cp == MaxSector) | |
1259 | sb->state = (1<< MD_SB_CLEAN); | |
1260 | } else | |
1261 | sb->recovery_cp = 0; | |
1262 | ||
1263 | sb->layout = mddev->layout; | |
9d8f0363 | 1264 | sb->chunk_size = mddev->chunk_sectors << 9; |
1da177e4 | 1265 | |
c3d9714e | 1266 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) |
a654b9d8 N |
1267 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); |
1268 | ||
1da177e4 | 1269 | sb->disks[0].state = (1<<MD_DISK_REMOVED); |
dafb20fa | 1270 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1271 | mdp_disk_t *d; |
86e6ffdd | 1272 | int desc_nr; |
0261cd9f N |
1273 | int is_active = test_bit(In_sync, &rdev2->flags); |
1274 | ||
1275 | if (rdev2->raid_disk >= 0 && | |
1276 | sb->minor_version >= 91) | |
1277 | /* we have nowhere to store the recovery_offset, | |
1278 | * but if it is not below the reshape_position, | |
1279 | * we can piggy-back on that. | |
1280 | */ | |
1281 | is_active = 1; | |
1282 | if (rdev2->raid_disk < 0 || | |
1283 | test_bit(Faulty, &rdev2->flags)) | |
1284 | is_active = 0; | |
1285 | if (is_active) | |
86e6ffdd | 1286 | desc_nr = rdev2->raid_disk; |
1da177e4 | 1287 | else |
86e6ffdd | 1288 | desc_nr = next_spare++; |
19133a42 | 1289 | rdev2->desc_nr = desc_nr; |
1da177e4 LT |
1290 | d = &sb->disks[rdev2->desc_nr]; |
1291 | nr_disks++; | |
1292 | d->number = rdev2->desc_nr; | |
1293 | d->major = MAJOR(rdev2->bdev->bd_dev); | |
1294 | d->minor = MINOR(rdev2->bdev->bd_dev); | |
0261cd9f | 1295 | if (is_active) |
1da177e4 LT |
1296 | d->raid_disk = rdev2->raid_disk; |
1297 | else | |
1298 | d->raid_disk = rdev2->desc_nr; /* compatibility */ | |
1be7892f | 1299 | if (test_bit(Faulty, &rdev2->flags)) |
1da177e4 | 1300 | d->state = (1<<MD_DISK_FAULTY); |
0261cd9f | 1301 | else if (is_active) { |
1da177e4 | 1302 | d->state = (1<<MD_DISK_ACTIVE); |
0261cd9f N |
1303 | if (test_bit(In_sync, &rdev2->flags)) |
1304 | d->state |= (1<<MD_DISK_SYNC); | |
1da177e4 LT |
1305 | active++; |
1306 | working++; | |
1307 | } else { | |
1308 | d->state = 0; | |
1309 | spare++; | |
1310 | working++; | |
1311 | } | |
8ddf9efe N |
1312 | if (test_bit(WriteMostly, &rdev2->flags)) |
1313 | d->state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
1314 | if (test_bit(FailFast, &rdev2->flags)) |
1315 | d->state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 | 1316 | } |
1da177e4 LT |
1317 | /* now set the "removed" and "faulty" bits on any missing devices */ |
1318 | for (i=0 ; i < mddev->raid_disks ; i++) { | |
1319 | mdp_disk_t *d = &sb->disks[i]; | |
1320 | if (d->state == 0 && d->number == 0) { | |
1321 | d->number = i; | |
1322 | d->raid_disk = i; | |
1323 | d->state = (1<<MD_DISK_REMOVED); | |
1324 | d->state |= (1<<MD_DISK_FAULTY); | |
1325 | failed++; | |
1326 | } | |
1327 | } | |
1328 | sb->nr_disks = nr_disks; | |
1329 | sb->active_disks = active; | |
1330 | sb->working_disks = working; | |
1331 | sb->failed_disks = failed; | |
1332 | sb->spare_disks = spare; | |
1333 | ||
1334 | sb->this_disk = sb->disks[rdev->desc_nr]; | |
1335 | sb->sb_csum = calc_sb_csum(sb); | |
1336 | } | |
1337 | ||
0cd17fec CW |
1338 | /* |
1339 | * rdev_size_change for 0.90.0 | |
1340 | */ | |
1341 | static unsigned long long | |
3cb03002 | 1342 | super_90_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec | 1343 | { |
58c0fed4 | 1344 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1345 | return 0; /* component must fit device */ |
c3d9714e | 1346 | if (rdev->mddev->bitmap_info.offset) |
0cd17fec | 1347 | return 0; /* can't move bitmap */ |
57b2caa3 | 1348 | rdev->sb_start = calc_dev_sboffset(rdev); |
15f4a5fd AN |
1349 | if (!num_sectors || num_sectors > rdev->sb_start) |
1350 | num_sectors = rdev->sb_start; | |
27a7b260 N |
1351 | /* Limit to 4TB as metadata cannot record more than that. |
1352 | * 4TB == 2^32 KB, or 2*2^32 sectors. | |
1353 | */ | |
3312c951 AB |
1354 | if (IS_ENABLED(CONFIG_LBDAF) && (u64)num_sectors >= (2ULL << 32) && |
1355 | rdev->mddev->level >= 1) | |
1356 | num_sectors = (sector_t)(2ULL << 32) - 2; | |
46533ff7 N |
1357 | do { |
1358 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
0cd17fec | 1359 | rdev->sb_page); |
46533ff7 | 1360 | } while (md_super_wait(rdev->mddev) < 0); |
c26a44ed | 1361 | return num_sectors; |
0cd17fec CW |
1362 | } |
1363 | ||
c6563a8c N |
1364 | static int |
1365 | super_90_allow_new_offset(struct md_rdev *rdev, unsigned long long new_offset) | |
1366 | { | |
1367 | /* non-zero offset changes not possible with v0.90 */ | |
1368 | return new_offset == 0; | |
1369 | } | |
0cd17fec | 1370 | |
1da177e4 LT |
1371 | /* |
1372 | * version 1 superblock | |
1373 | */ | |
1374 | ||
f72ffdd6 | 1375 | static __le32 calc_sb_1_csum(struct mdp_superblock_1 *sb) |
1da177e4 | 1376 | { |
1c05b4bc N |
1377 | __le32 disk_csum; |
1378 | u32 csum; | |
1da177e4 LT |
1379 | unsigned long long newcsum; |
1380 | int size = 256 + le32_to_cpu(sb->max_dev)*2; | |
1c05b4bc | 1381 | __le32 *isuper = (__le32*)sb; |
1da177e4 LT |
1382 | |
1383 | disk_csum = sb->sb_csum; | |
1384 | sb->sb_csum = 0; | |
1385 | newcsum = 0; | |
1f3c9907 | 1386 | for (; size >= 4; size -= 4) |
1da177e4 LT |
1387 | newcsum += le32_to_cpu(*isuper++); |
1388 | ||
1389 | if (size == 2) | |
1c05b4bc | 1390 | newcsum += le16_to_cpu(*(__le16*) isuper); |
1da177e4 LT |
1391 | |
1392 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
1393 | sb->sb_csum = disk_csum; | |
1394 | return cpu_to_le32(csum); | |
1395 | } | |
1396 | ||
3cb03002 | 1397 | static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1398 | { |
1399 | struct mdp_superblock_1 *sb; | |
1400 | int ret; | |
0f420358 | 1401 | sector_t sb_start; |
c6563a8c | 1402 | sector_t sectors; |
1da177e4 | 1403 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; |
0002b271 | 1404 | int bmask; |
1da177e4 LT |
1405 | |
1406 | /* | |
0f420358 | 1407 | * Calculate the position of the superblock in 512byte sectors. |
1da177e4 LT |
1408 | * It is always aligned to a 4K boundary and |
1409 | * depeding on minor_version, it can be: | |
1410 | * 0: At least 8K, but less than 12K, from end of device | |
1411 | * 1: At start of device | |
1412 | * 2: 4K from start of device. | |
1413 | */ | |
1414 | switch(minor_version) { | |
1415 | case 0: | |
77304d2a | 1416 | sb_start = i_size_read(rdev->bdev->bd_inode) >> 9; |
0f420358 AN |
1417 | sb_start -= 8*2; |
1418 | sb_start &= ~(sector_t)(4*2-1); | |
1da177e4 LT |
1419 | break; |
1420 | case 1: | |
0f420358 | 1421 | sb_start = 0; |
1da177e4 LT |
1422 | break; |
1423 | case 2: | |
0f420358 | 1424 | sb_start = 8; |
1da177e4 LT |
1425 | break; |
1426 | default: | |
1427 | return -EINVAL; | |
1428 | } | |
0f420358 | 1429 | rdev->sb_start = sb_start; |
1da177e4 | 1430 | |
0002b271 N |
1431 | /* superblock is rarely larger than 1K, but it can be larger, |
1432 | * and it is safe to read 4k, so we do that | |
1433 | */ | |
1434 | ret = read_disk_sb(rdev, 4096); | |
1da177e4 LT |
1435 | if (ret) return ret; |
1436 | ||
65a06f06 | 1437 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1438 | |
1439 | if (sb->magic != cpu_to_le32(MD_SB_MAGIC) || | |
1440 | sb->major_version != cpu_to_le32(1) || | |
1441 | le32_to_cpu(sb->max_dev) > (4096-256)/2 || | |
0f420358 | 1442 | le64_to_cpu(sb->super_offset) != rdev->sb_start || |
71c0805c | 1443 | (le32_to_cpu(sb->feature_map) & ~MD_FEATURE_ALL) != 0) |
1da177e4 LT |
1444 | return -EINVAL; |
1445 | ||
1446 | if (calc_sb_1_csum(sb) != sb->sb_csum) { | |
9d48739e | 1447 | pr_warn("md: invalid superblock checksum on %s\n", |
1da177e4 LT |
1448 | bdevname(rdev->bdev,b)); |
1449 | return -EINVAL; | |
1450 | } | |
1451 | if (le64_to_cpu(sb->data_size) < 10) { | |
9d48739e N |
1452 | pr_warn("md: data_size too small on %s\n", |
1453 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
1454 | return -EINVAL; |
1455 | } | |
c6563a8c N |
1456 | if (sb->pad0 || |
1457 | sb->pad3[0] || | |
1458 | memcmp(sb->pad3, sb->pad3+1, sizeof(sb->pad3) - sizeof(sb->pad3[1]))) | |
1459 | /* Some padding is non-zero, might be a new feature */ | |
1460 | return -EINVAL; | |
e11e93fa | 1461 | |
1da177e4 LT |
1462 | rdev->preferred_minor = 0xffff; |
1463 | rdev->data_offset = le64_to_cpu(sb->data_offset); | |
c6563a8c N |
1464 | rdev->new_data_offset = rdev->data_offset; |
1465 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE) && | |
1466 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) | |
1467 | rdev->new_data_offset += (s32)le32_to_cpu(sb->new_offset); | |
4dbcdc75 | 1468 | atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read)); |
1da177e4 | 1469 | |
0002b271 | 1470 | rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256; |
e1defc4f | 1471 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; |
0002b271 | 1472 | if (rdev->sb_size & bmask) |
a1801f85 N |
1473 | rdev->sb_size = (rdev->sb_size | bmask) + 1; |
1474 | ||
1475 | if (minor_version | |
0f420358 | 1476 | && rdev->data_offset < sb_start + (rdev->sb_size/512)) |
a1801f85 | 1477 | return -EINVAL; |
c6563a8c N |
1478 | if (minor_version |
1479 | && rdev->new_data_offset < sb_start + (rdev->sb_size/512)) | |
1480 | return -EINVAL; | |
0002b271 | 1481 | |
31b65a0d N |
1482 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH)) |
1483 | rdev->desc_nr = -1; | |
1484 | else | |
1485 | rdev->desc_nr = le32_to_cpu(sb->dev_number); | |
1486 | ||
2699b672 N |
1487 | if (!rdev->bb_page) { |
1488 | rdev->bb_page = alloc_page(GFP_KERNEL); | |
1489 | if (!rdev->bb_page) | |
1490 | return -ENOMEM; | |
1491 | } | |
1492 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BAD_BLOCKS) && | |
1493 | rdev->badblocks.count == 0) { | |
1494 | /* need to load the bad block list. | |
1495 | * Currently we limit it to one page. | |
1496 | */ | |
1497 | s32 offset; | |
1498 | sector_t bb_sector; | |
1499 | u64 *bbp; | |
1500 | int i; | |
1501 | int sectors = le16_to_cpu(sb->bblog_size); | |
1502 | if (sectors > (PAGE_SIZE / 512)) | |
1503 | return -EINVAL; | |
1504 | offset = le32_to_cpu(sb->bblog_offset); | |
1505 | if (offset == 0) | |
1506 | return -EINVAL; | |
1507 | bb_sector = (long long)offset; | |
1508 | if (!sync_page_io(rdev, bb_sector, sectors << 9, | |
796a5cf0 | 1509 | rdev->bb_page, REQ_OP_READ, 0, true)) |
2699b672 N |
1510 | return -EIO; |
1511 | bbp = (u64 *)page_address(rdev->bb_page); | |
1512 | rdev->badblocks.shift = sb->bblog_shift; | |
1513 | for (i = 0 ; i < (sectors << (9-3)) ; i++, bbp++) { | |
1514 | u64 bb = le64_to_cpu(*bbp); | |
1515 | int count = bb & (0x3ff); | |
1516 | u64 sector = bb >> 10; | |
1517 | sector <<= sb->bblog_shift; | |
1518 | count <<= sb->bblog_shift; | |
1519 | if (bb + 1 == 0) | |
1520 | break; | |
fc974ee2 | 1521 | if (badblocks_set(&rdev->badblocks, sector, count, 1)) |
2699b672 N |
1522 | return -EINVAL; |
1523 | } | |
486adf72 N |
1524 | } else if (sb->bblog_offset != 0) |
1525 | rdev->badblocks.shift = 0; | |
2699b672 | 1526 | |
9a7b2b0f | 1527 | if (!refdev) { |
8ed75463 | 1528 | ret = 1; |
9a7b2b0f | 1529 | } else { |
1da177e4 | 1530 | __u64 ev1, ev2; |
65a06f06 | 1531 | struct mdp_superblock_1 *refsb = page_address(refdev->sb_page); |
1da177e4 LT |
1532 | |
1533 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16) != 0 || | |
1534 | sb->level != refsb->level || | |
1535 | sb->layout != refsb->layout || | |
1536 | sb->chunksize != refsb->chunksize) { | |
9d48739e | 1537 | pr_warn("md: %s has strangely different superblock to %s\n", |
1da177e4 LT |
1538 | bdevname(rdev->bdev,b), |
1539 | bdevname(refdev->bdev,b2)); | |
1540 | return -EINVAL; | |
1541 | } | |
1542 | ev1 = le64_to_cpu(sb->events); | |
1543 | ev2 = le64_to_cpu(refsb->events); | |
1544 | ||
1545 | if (ev1 > ev2) | |
8ed75463 N |
1546 | ret = 1; |
1547 | else | |
1548 | ret = 0; | |
1da177e4 | 1549 | } |
c6563a8c N |
1550 | if (minor_version) { |
1551 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9); | |
1552 | sectors -= rdev->data_offset; | |
1553 | } else | |
1554 | sectors = rdev->sb_start; | |
1555 | if (sectors < le64_to_cpu(sb->data_size)) | |
1da177e4 | 1556 | return -EINVAL; |
dd8ac336 | 1557 | rdev->sectors = le64_to_cpu(sb->data_size); |
8ed75463 | 1558 | return ret; |
1da177e4 LT |
1559 | } |
1560 | ||
fd01b88c | 1561 | static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 1562 | { |
65a06f06 | 1563 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
07d84d10 | 1564 | __u64 ev1 = le64_to_cpu(sb->events); |
1da177e4 | 1565 | |
41158c7e | 1566 | rdev->raid_disk = -1; |
c5d79adb N |
1567 | clear_bit(Faulty, &rdev->flags); |
1568 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1569 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1570 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1571 | |
1da177e4 LT |
1572 | if (mddev->raid_disks == 0) { |
1573 | mddev->major_version = 1; | |
1574 | mddev->patch_version = 0; | |
e691063a | 1575 | mddev->external = 0; |
9d8f0363 | 1576 | mddev->chunk_sectors = le32_to_cpu(sb->chunksize); |
9ebc6ef1 DD |
1577 | mddev->ctime = le64_to_cpu(sb->ctime); |
1578 | mddev->utime = le64_to_cpu(sb->utime); | |
1da177e4 | 1579 | mddev->level = le32_to_cpu(sb->level); |
d9d166c2 | 1580 | mddev->clevel[0] = 0; |
1da177e4 LT |
1581 | mddev->layout = le32_to_cpu(sb->layout); |
1582 | mddev->raid_disks = le32_to_cpu(sb->raid_disks); | |
58c0fed4 | 1583 | mddev->dev_sectors = le64_to_cpu(sb->size); |
07d84d10 | 1584 | mddev->events = ev1; |
c3d9714e | 1585 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1586 | mddev->bitmap_info.space = 0; |
1587 | /* Default location for bitmap is 1K after superblock | |
1588 | * using 3K - total of 4K | |
1589 | */ | |
c3d9714e | 1590 | mddev->bitmap_info.default_offset = 1024 >> 9; |
6409bb05 | 1591 | mddev->bitmap_info.default_space = (4096-1024) >> 9; |
2c810cdd N |
1592 | mddev->reshape_backwards = 0; |
1593 | ||
1da177e4 LT |
1594 | mddev->recovery_cp = le64_to_cpu(sb->resync_offset); |
1595 | memcpy(mddev->uuid, sb->set_uuid, 16); | |
1596 | ||
1597 | mddev->max_disks = (4096-256)/2; | |
a654b9d8 | 1598 | |
71c0805c | 1599 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) && |
6409bb05 | 1600 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1601 | mddev->bitmap_info.offset = |
1602 | (__s32)le32_to_cpu(sb->bitmap_offset); | |
6409bb05 N |
1603 | /* Metadata doesn't record how much space is available. |
1604 | * For 1.0, we assume we can use up to the superblock | |
1605 | * if before, else to 4K beyond superblock. | |
1606 | * For others, assume no change is possible. | |
1607 | */ | |
1608 | if (mddev->minor_version > 0) | |
1609 | mddev->bitmap_info.space = 0; | |
1610 | else if (mddev->bitmap_info.offset > 0) | |
1611 | mddev->bitmap_info.space = | |
1612 | 8 - mddev->bitmap_info.offset; | |
1613 | else | |
1614 | mddev->bitmap_info.space = | |
1615 | -mddev->bitmap_info.offset; | |
1616 | } | |
e11e93fa | 1617 | |
f6705578 N |
1618 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { |
1619 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); | |
1620 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); | |
1621 | mddev->new_level = le32_to_cpu(sb->new_level); | |
1622 | mddev->new_layout = le32_to_cpu(sb->new_layout); | |
664e7c41 | 1623 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_chunk); |
2c810cdd N |
1624 | if (mddev->delta_disks < 0 || |
1625 | (mddev->delta_disks == 0 && | |
1626 | (le32_to_cpu(sb->feature_map) | |
1627 | & MD_FEATURE_RESHAPE_BACKWARDS))) | |
1628 | mddev->reshape_backwards = 1; | |
f6705578 N |
1629 | } else { |
1630 | mddev->reshape_position = MaxSector; | |
1631 | mddev->delta_disks = 0; | |
1632 | mddev->new_level = mddev->level; | |
1633 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1634 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1635 | } |
1636 | ||
486b0f7b | 1637 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL) |
a62ab49e | 1638 | set_bit(MD_HAS_JOURNAL, &mddev->flags); |
41158c7e | 1639 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1640 | /* Insist of good event counter while assembling, except for |
1641 | * spares (which don't need an event count) */ | |
1da177e4 | 1642 | ++ev1; |
be6800a7 N |
1643 | if (rdev->desc_nr >= 0 && |
1644 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
a3dfbdaa SL |
1645 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || |
1646 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL)) | |
be6800a7 N |
1647 | if (ev1 < mddev->events) |
1648 | return -EINVAL; | |
41158c7e N |
1649 | } else if (mddev->bitmap) { |
1650 | /* If adding to array with a bitmap, then we can accept an | |
1651 | * older device, but not too old. | |
1652 | */ | |
41158c7e N |
1653 | if (ev1 < mddev->bitmap->events_cleared) |
1654 | return 0; | |
8313b8e5 N |
1655 | if (ev1 < mddev->events) |
1656 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1657 | } else { |
1658 | if (ev1 < mddev->events) | |
1659 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1660 | return 0; | |
1661 | } | |
1da177e4 LT |
1662 | if (mddev->level != LEVEL_MULTIPATH) { |
1663 | int role; | |
3673f305 N |
1664 | if (rdev->desc_nr < 0 || |
1665 | rdev->desc_nr >= le32_to_cpu(sb->max_dev)) { | |
c4d4c91b | 1666 | role = MD_DISK_ROLE_SPARE; |
3673f305 N |
1667 | rdev->desc_nr = -1; |
1668 | } else | |
1669 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
1da177e4 | 1670 | switch(role) { |
c4d4c91b | 1671 | case MD_DISK_ROLE_SPARE: /* spare */ |
1da177e4 | 1672 | break; |
c4d4c91b | 1673 | case MD_DISK_ROLE_FAULTY: /* faulty */ |
b2d444d7 | 1674 | set_bit(Faulty, &rdev->flags); |
1da177e4 | 1675 | break; |
bac624f3 SL |
1676 | case MD_DISK_ROLE_JOURNAL: /* journal device */ |
1677 | if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL)) { | |
1678 | /* journal device without journal feature */ | |
9d48739e | 1679 | pr_warn("md: journal device provided without journal feature, ignoring the device\n"); |
bac624f3 SL |
1680 | return -EINVAL; |
1681 | } | |
1682 | set_bit(Journal, &rdev->flags); | |
3069aa8d | 1683 | rdev->journal_tail = le64_to_cpu(sb->journal_tail); |
9b15603d | 1684 | rdev->raid_disk = 0; |
bac624f3 | 1685 | break; |
1da177e4 | 1686 | default: |
f466722c | 1687 | rdev->saved_raid_disk = role; |
5fd6c1dc | 1688 | if ((le32_to_cpu(sb->feature_map) & |
f466722c | 1689 | MD_FEATURE_RECOVERY_OFFSET)) { |
5fd6c1dc | 1690 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); |
f466722c N |
1691 | if (!(le32_to_cpu(sb->feature_map) & |
1692 | MD_FEATURE_RECOVERY_BITMAP)) | |
1693 | rdev->saved_raid_disk = -1; | |
1694 | } else | |
5fd6c1dc | 1695 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1696 | rdev->raid_disk = role; |
1697 | break; | |
1698 | } | |
8ddf9efe N |
1699 | if (sb->devflags & WriteMostly1) |
1700 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1701 | if (sb->devflags & FailFast1) |
1702 | set_bit(FailFast, &rdev->flags); | |
2d78f8c4 N |
1703 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) |
1704 | set_bit(Replacement, &rdev->flags); | |
41158c7e | 1705 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1706 | set_bit(In_sync, &rdev->flags); |
41158c7e | 1707 | |
1da177e4 LT |
1708 | return 0; |
1709 | } | |
1710 | ||
fd01b88c | 1711 | static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1712 | { |
1713 | struct mdp_superblock_1 *sb; | |
3cb03002 | 1714 | struct md_rdev *rdev2; |
1da177e4 LT |
1715 | int max_dev, i; |
1716 | /* make rdev->sb match mddev and rdev data. */ | |
1717 | ||
65a06f06 | 1718 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1719 | |
1720 | sb->feature_map = 0; | |
1721 | sb->pad0 = 0; | |
5fd6c1dc | 1722 | sb->recovery_offset = cpu_to_le64(0); |
1da177e4 LT |
1723 | memset(sb->pad3, 0, sizeof(sb->pad3)); |
1724 | ||
1725 | sb->utime = cpu_to_le64((__u64)mddev->utime); | |
1726 | sb->events = cpu_to_le64(mddev->events); | |
1727 | if (mddev->in_sync) | |
1728 | sb->resync_offset = cpu_to_le64(mddev->recovery_cp); | |
bd18f646 SL |
1729 | else if (test_bit(MD_JOURNAL_CLEAN, &mddev->flags)) |
1730 | sb->resync_offset = cpu_to_le64(MaxSector); | |
1da177e4 LT |
1731 | else |
1732 | sb->resync_offset = cpu_to_le64(0); | |
1733 | ||
1c05b4bc | 1734 | sb->cnt_corrected_read = cpu_to_le32(atomic_read(&rdev->corrected_errors)); |
4dbcdc75 | 1735 | |
f0ca340c | 1736 | sb->raid_disks = cpu_to_le32(mddev->raid_disks); |
58c0fed4 | 1737 | sb->size = cpu_to_le64(mddev->dev_sectors); |
9d8f0363 | 1738 | sb->chunksize = cpu_to_le32(mddev->chunk_sectors); |
62e1e389 N |
1739 | sb->level = cpu_to_le32(mddev->level); |
1740 | sb->layout = cpu_to_le32(mddev->layout); | |
688834e6 N |
1741 | if (test_bit(FailFast, &rdev->flags)) |
1742 | sb->devflags |= FailFast1; | |
1743 | else | |
1744 | sb->devflags &= ~FailFast1; | |
f0ca340c | 1745 | |
aeb9b211 N |
1746 | if (test_bit(WriteMostly, &rdev->flags)) |
1747 | sb->devflags |= WriteMostly1; | |
1748 | else | |
1749 | sb->devflags &= ~WriteMostly1; | |
c6563a8c N |
1750 | sb->data_offset = cpu_to_le64(rdev->data_offset); |
1751 | sb->data_size = cpu_to_le64(rdev->sectors); | |
aeb9b211 | 1752 | |
c3d9714e N |
1753 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) { |
1754 | sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset); | |
71c0805c | 1755 | sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); |
a654b9d8 | 1756 | } |
5fd6c1dc | 1757 | |
f2076e7d | 1758 | if (rdev->raid_disk >= 0 && !test_bit(Journal, &rdev->flags) && |
97e4f42d | 1759 | !test_bit(In_sync, &rdev->flags)) { |
93be75ff N |
1760 | sb->feature_map |= |
1761 | cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET); | |
1762 | sb->recovery_offset = | |
1763 | cpu_to_le64(rdev->recovery_offset); | |
f466722c N |
1764 | if (rdev->saved_raid_disk >= 0 && mddev->bitmap) |
1765 | sb->feature_map |= | |
1766 | cpu_to_le32(MD_FEATURE_RECOVERY_BITMAP); | |
5fd6c1dc | 1767 | } |
3069aa8d SL |
1768 | /* Note: recovery_offset and journal_tail share space */ |
1769 | if (test_bit(Journal, &rdev->flags)) | |
1770 | sb->journal_tail = cpu_to_le64(rdev->journal_tail); | |
2d78f8c4 N |
1771 | if (test_bit(Replacement, &rdev->flags)) |
1772 | sb->feature_map |= | |
1773 | cpu_to_le32(MD_FEATURE_REPLACEMENT); | |
5fd6c1dc | 1774 | |
f6705578 N |
1775 | if (mddev->reshape_position != MaxSector) { |
1776 | sb->feature_map |= cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); | |
1777 | sb->reshape_position = cpu_to_le64(mddev->reshape_position); | |
1778 | sb->new_layout = cpu_to_le32(mddev->new_layout); | |
1779 | sb->delta_disks = cpu_to_le32(mddev->delta_disks); | |
1780 | sb->new_level = cpu_to_le32(mddev->new_level); | |
664e7c41 | 1781 | sb->new_chunk = cpu_to_le32(mddev->new_chunk_sectors); |
2c810cdd N |
1782 | if (mddev->delta_disks == 0 && |
1783 | mddev->reshape_backwards) | |
1784 | sb->feature_map | |
1785 | |= cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS); | |
c6563a8c N |
1786 | if (rdev->new_data_offset != rdev->data_offset) { |
1787 | sb->feature_map | |
1788 | |= cpu_to_le32(MD_FEATURE_NEW_OFFSET); | |
1789 | sb->new_offset = cpu_to_le32((__u32)(rdev->new_data_offset | |
1790 | - rdev->data_offset)); | |
1791 | } | |
f6705578 | 1792 | } |
a654b9d8 | 1793 | |
3c462c88 GR |
1794 | if (mddev_is_clustered(mddev)) |
1795 | sb->feature_map |= cpu_to_le32(MD_FEATURE_CLUSTERED); | |
1796 | ||
2699b672 N |
1797 | if (rdev->badblocks.count == 0) |
1798 | /* Nothing to do for bad blocks*/ ; | |
1799 | else if (sb->bblog_offset == 0) | |
1800 | /* Cannot record bad blocks on this device */ | |
1801 | md_error(mddev, rdev); | |
1802 | else { | |
1803 | struct badblocks *bb = &rdev->badblocks; | |
1804 | u64 *bbp = (u64 *)page_address(rdev->bb_page); | |
1805 | u64 *p = bb->page; | |
1806 | sb->feature_map |= cpu_to_le32(MD_FEATURE_BAD_BLOCKS); | |
1807 | if (bb->changed) { | |
1808 | unsigned seq; | |
1809 | ||
1810 | retry: | |
1811 | seq = read_seqbegin(&bb->lock); | |
1812 | ||
1813 | memset(bbp, 0xff, PAGE_SIZE); | |
1814 | ||
1815 | for (i = 0 ; i < bb->count ; i++) { | |
35f9ac2d | 1816 | u64 internal_bb = p[i]; |
2699b672 N |
1817 | u64 store_bb = ((BB_OFFSET(internal_bb) << 10) |
1818 | | BB_LEN(internal_bb)); | |
35f9ac2d | 1819 | bbp[i] = cpu_to_le64(store_bb); |
2699b672 | 1820 | } |
d0962936 | 1821 | bb->changed = 0; |
2699b672 N |
1822 | if (read_seqretry(&bb->lock, seq)) |
1823 | goto retry; | |
1824 | ||
1825 | bb->sector = (rdev->sb_start + | |
1826 | (int)le32_to_cpu(sb->bblog_offset)); | |
1827 | bb->size = le16_to_cpu(sb->bblog_size); | |
2699b672 N |
1828 | } |
1829 | } | |
1830 | ||
1da177e4 | 1831 | max_dev = 0; |
dafb20fa | 1832 | rdev_for_each(rdev2, mddev) |
1da177e4 LT |
1833 | if (rdev2->desc_nr+1 > max_dev) |
1834 | max_dev = rdev2->desc_nr+1; | |
a778b73f | 1835 | |
70471daf N |
1836 | if (max_dev > le32_to_cpu(sb->max_dev)) { |
1837 | int bmask; | |
a778b73f | 1838 | sb->max_dev = cpu_to_le32(max_dev); |
70471daf N |
1839 | rdev->sb_size = max_dev * 2 + 256; |
1840 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; | |
1841 | if (rdev->sb_size & bmask) | |
1842 | rdev->sb_size = (rdev->sb_size | bmask) + 1; | |
ddcf3522 N |
1843 | } else |
1844 | max_dev = le32_to_cpu(sb->max_dev); | |
1845 | ||
1da177e4 | 1846 | for (i=0; i<max_dev;i++) |
c4d4c91b | 1847 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY); |
f72ffdd6 | 1848 | |
a97b7896 SL |
1849 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) |
1850 | sb->feature_map |= cpu_to_le32(MD_FEATURE_JOURNAL); | |
f72ffdd6 | 1851 | |
dafb20fa | 1852 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1853 | i = rdev2->desc_nr; |
b2d444d7 | 1854 | if (test_bit(Faulty, &rdev2->flags)) |
c4d4c91b | 1855 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY); |
b2d444d7 | 1856 | else if (test_bit(In_sync, &rdev2->flags)) |
1da177e4 | 1857 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
a97b7896 | 1858 | else if (test_bit(Journal, &rdev2->flags)) |
bac624f3 | 1859 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_JOURNAL); |
93be75ff | 1860 | else if (rdev2->raid_disk >= 0) |
5fd6c1dc | 1861 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
1da177e4 | 1862 | else |
c4d4c91b | 1863 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
1da177e4 LT |
1864 | } |
1865 | ||
1da177e4 LT |
1866 | sb->sb_csum = calc_sb_1_csum(sb); |
1867 | } | |
1868 | ||
0cd17fec | 1869 | static unsigned long long |
3cb03002 | 1870 | super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec CW |
1871 | { |
1872 | struct mdp_superblock_1 *sb; | |
15f4a5fd | 1873 | sector_t max_sectors; |
58c0fed4 | 1874 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1875 | return 0; /* component must fit device */ |
c6563a8c N |
1876 | if (rdev->data_offset != rdev->new_data_offset) |
1877 | return 0; /* too confusing */ | |
0f420358 | 1878 | if (rdev->sb_start < rdev->data_offset) { |
0cd17fec | 1879 | /* minor versions 1 and 2; superblock before data */ |
77304d2a | 1880 | max_sectors = i_size_read(rdev->bdev->bd_inode) >> 9; |
15f4a5fd AN |
1881 | max_sectors -= rdev->data_offset; |
1882 | if (!num_sectors || num_sectors > max_sectors) | |
1883 | num_sectors = max_sectors; | |
c3d9714e | 1884 | } else if (rdev->mddev->bitmap_info.offset) { |
0cd17fec CW |
1885 | /* minor version 0 with bitmap we can't move */ |
1886 | return 0; | |
1887 | } else { | |
1888 | /* minor version 0; superblock after data */ | |
0f420358 | 1889 | sector_t sb_start; |
77304d2a | 1890 | sb_start = (i_size_read(rdev->bdev->bd_inode) >> 9) - 8*2; |
0f420358 | 1891 | sb_start &= ~(sector_t)(4*2 - 1); |
dd8ac336 | 1892 | max_sectors = rdev->sectors + sb_start - rdev->sb_start; |
15f4a5fd AN |
1893 | if (!num_sectors || num_sectors > max_sectors) |
1894 | num_sectors = max_sectors; | |
0f420358 | 1895 | rdev->sb_start = sb_start; |
0cd17fec | 1896 | } |
65a06f06 | 1897 | sb = page_address(rdev->sb_page); |
15f4a5fd | 1898 | sb->data_size = cpu_to_le64(num_sectors); |
0f420358 | 1899 | sb->super_offset = rdev->sb_start; |
0cd17fec | 1900 | sb->sb_csum = calc_sb_1_csum(sb); |
46533ff7 N |
1901 | do { |
1902 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
1903 | rdev->sb_page); | |
1904 | } while (md_super_wait(rdev->mddev) < 0); | |
c26a44ed | 1905 | return num_sectors; |
c6563a8c N |
1906 | |
1907 | } | |
1908 | ||
1909 | static int | |
1910 | super_1_allow_new_offset(struct md_rdev *rdev, | |
1911 | unsigned long long new_offset) | |
1912 | { | |
1913 | /* All necessary checks on new >= old have been done */ | |
1914 | struct bitmap *bitmap; | |
1915 | if (new_offset >= rdev->data_offset) | |
1916 | return 1; | |
1917 | ||
1918 | /* with 1.0 metadata, there is no metadata to tread on | |
1919 | * so we can always move back */ | |
1920 | if (rdev->mddev->minor_version == 0) | |
1921 | return 1; | |
1922 | ||
1923 | /* otherwise we must be sure not to step on | |
1924 | * any metadata, so stay: | |
1925 | * 36K beyond start of superblock | |
1926 | * beyond end of badblocks | |
1927 | * beyond write-intent bitmap | |
1928 | */ | |
1929 | if (rdev->sb_start + (32+4)*2 > new_offset) | |
1930 | return 0; | |
1931 | bitmap = rdev->mddev->bitmap; | |
1932 | if (bitmap && !rdev->mddev->bitmap_info.file && | |
1933 | rdev->sb_start + rdev->mddev->bitmap_info.offset + | |
1ec885cd | 1934 | bitmap->storage.file_pages * (PAGE_SIZE>>9) > new_offset) |
c6563a8c N |
1935 | return 0; |
1936 | if (rdev->badblocks.sector + rdev->badblocks.size > new_offset) | |
1937 | return 0; | |
1938 | ||
1939 | return 1; | |
0cd17fec | 1940 | } |
1da177e4 | 1941 | |
75c96f85 | 1942 | static struct super_type super_types[] = { |
1da177e4 LT |
1943 | [0] = { |
1944 | .name = "0.90.0", | |
1945 | .owner = THIS_MODULE, | |
0cd17fec CW |
1946 | .load_super = super_90_load, |
1947 | .validate_super = super_90_validate, | |
1948 | .sync_super = super_90_sync, | |
1949 | .rdev_size_change = super_90_rdev_size_change, | |
c6563a8c | 1950 | .allow_new_offset = super_90_allow_new_offset, |
1da177e4 LT |
1951 | }, |
1952 | [1] = { | |
1953 | .name = "md-1", | |
1954 | .owner = THIS_MODULE, | |
0cd17fec CW |
1955 | .load_super = super_1_load, |
1956 | .validate_super = super_1_validate, | |
1957 | .sync_super = super_1_sync, | |
1958 | .rdev_size_change = super_1_rdev_size_change, | |
c6563a8c | 1959 | .allow_new_offset = super_1_allow_new_offset, |
1da177e4 LT |
1960 | }, |
1961 | }; | |
1da177e4 | 1962 | |
fd01b88c | 1963 | static void sync_super(struct mddev *mddev, struct md_rdev *rdev) |
076f968b JB |
1964 | { |
1965 | if (mddev->sync_super) { | |
1966 | mddev->sync_super(mddev, rdev); | |
1967 | return; | |
1968 | } | |
1969 | ||
1970 | BUG_ON(mddev->major_version >= ARRAY_SIZE(super_types)); | |
1971 | ||
1972 | super_types[mddev->major_version].sync_super(mddev, rdev); | |
1973 | } | |
1974 | ||
fd01b88c | 1975 | static int match_mddev_units(struct mddev *mddev1, struct mddev *mddev2) |
1da177e4 | 1976 | { |
3cb03002 | 1977 | struct md_rdev *rdev, *rdev2; |
1da177e4 | 1978 | |
4b80991c | 1979 | rcu_read_lock(); |
0b020e85 SL |
1980 | rdev_for_each_rcu(rdev, mddev1) { |
1981 | if (test_bit(Faulty, &rdev->flags) || | |
1982 | test_bit(Journal, &rdev->flags) || | |
1983 | rdev->raid_disk == -1) | |
1984 | continue; | |
1985 | rdev_for_each_rcu(rdev2, mddev2) { | |
1986 | if (test_bit(Faulty, &rdev2->flags) || | |
1987 | test_bit(Journal, &rdev2->flags) || | |
1988 | rdev2->raid_disk == -1) | |
1989 | continue; | |
7dd5e7c3 | 1990 | if (rdev->bdev->bd_contains == |
4b80991c N |
1991 | rdev2->bdev->bd_contains) { |
1992 | rcu_read_unlock(); | |
7dd5e7c3 | 1993 | return 1; |
4b80991c | 1994 | } |
0b020e85 SL |
1995 | } |
1996 | } | |
4b80991c | 1997 | rcu_read_unlock(); |
1da177e4 LT |
1998 | return 0; |
1999 | } | |
2000 | ||
2001 | static LIST_HEAD(pending_raid_disks); | |
2002 | ||
ac5e7113 AN |
2003 | /* |
2004 | * Try to register data integrity profile for an mddev | |
2005 | * | |
2006 | * This is called when an array is started and after a disk has been kicked | |
2007 | * from the array. It only succeeds if all working and active component devices | |
2008 | * are integrity capable with matching profiles. | |
2009 | */ | |
fd01b88c | 2010 | int md_integrity_register(struct mddev *mddev) |
ac5e7113 | 2011 | { |
3cb03002 | 2012 | struct md_rdev *rdev, *reference = NULL; |
ac5e7113 AN |
2013 | |
2014 | if (list_empty(&mddev->disks)) | |
2015 | return 0; /* nothing to do */ | |
629acb6a JB |
2016 | if (!mddev->gendisk || blk_get_integrity(mddev->gendisk)) |
2017 | return 0; /* shouldn't register, or already is */ | |
dafb20fa | 2018 | rdev_for_each(rdev, mddev) { |
ac5e7113 AN |
2019 | /* skip spares and non-functional disks */ |
2020 | if (test_bit(Faulty, &rdev->flags)) | |
2021 | continue; | |
2022 | if (rdev->raid_disk < 0) | |
2023 | continue; | |
ac5e7113 AN |
2024 | if (!reference) { |
2025 | /* Use the first rdev as the reference */ | |
2026 | reference = rdev; | |
2027 | continue; | |
2028 | } | |
2029 | /* does this rdev's profile match the reference profile? */ | |
2030 | if (blk_integrity_compare(reference->bdev->bd_disk, | |
2031 | rdev->bdev->bd_disk) < 0) | |
2032 | return -EINVAL; | |
2033 | } | |
89078d57 MP |
2034 | if (!reference || !bdev_get_integrity(reference->bdev)) |
2035 | return 0; | |
ac5e7113 AN |
2036 | /* |
2037 | * All component devices are integrity capable and have matching | |
2038 | * profiles, register the common profile for the md device. | |
2039 | */ | |
25520d55 MP |
2040 | blk_integrity_register(mddev->gendisk, |
2041 | bdev_get_integrity(reference->bdev)); | |
2042 | ||
9d48739e | 2043 | pr_debug("md: data integrity enabled on %s\n", mdname(mddev)); |
a91a2785 | 2044 | if (bioset_integrity_create(mddev->bio_set, BIO_POOL_SIZE)) { |
9d48739e | 2045 | pr_err("md: failed to create integrity pool for %s\n", |
a91a2785 MP |
2046 | mdname(mddev)); |
2047 | return -EINVAL; | |
2048 | } | |
ac5e7113 AN |
2049 | return 0; |
2050 | } | |
2051 | EXPORT_SYMBOL(md_integrity_register); | |
2052 | ||
1501efad DW |
2053 | /* |
2054 | * Attempt to add an rdev, but only if it is consistent with the current | |
2055 | * integrity profile | |
2056 | */ | |
2057 | int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev) | |
3f9d99c1 | 2058 | { |
2863b9eb JB |
2059 | struct blk_integrity *bi_rdev; |
2060 | struct blk_integrity *bi_mddev; | |
1501efad | 2061 | char name[BDEVNAME_SIZE]; |
2863b9eb JB |
2062 | |
2063 | if (!mddev->gendisk) | |
1501efad | 2064 | return 0; |
2863b9eb JB |
2065 | |
2066 | bi_rdev = bdev_get_integrity(rdev->bdev); | |
2067 | bi_mddev = blk_get_integrity(mddev->gendisk); | |
3f9d99c1 | 2068 | |
ac5e7113 | 2069 | if (!bi_mddev) /* nothing to do */ |
1501efad DW |
2070 | return 0; |
2071 | ||
2072 | if (blk_integrity_compare(mddev->gendisk, rdev->bdev->bd_disk) != 0) { | |
9d48739e N |
2073 | pr_err("%s: incompatible integrity profile for %s\n", |
2074 | mdname(mddev), bdevname(rdev->bdev, name)); | |
1501efad DW |
2075 | return -ENXIO; |
2076 | } | |
2077 | ||
2078 | return 0; | |
3f9d99c1 | 2079 | } |
ac5e7113 | 2080 | EXPORT_SYMBOL(md_integrity_add_rdev); |
3f9d99c1 | 2081 | |
f72ffdd6 | 2082 | static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) |
1da177e4 | 2083 | { |
7dd5e7c3 | 2084 | char b[BDEVNAME_SIZE]; |
f637b9f9 | 2085 | struct kobject *ko; |
5e55e2f5 | 2086 | int err; |
1da177e4 | 2087 | |
11e2ede0 DW |
2088 | /* prevent duplicates */ |
2089 | if (find_rdev(mddev, rdev->bdev->bd_dev)) | |
2090 | return -EEXIST; | |
2091 | ||
dd8ac336 | 2092 | /* make sure rdev->sectors exceeds mddev->dev_sectors */ |
f6b6ec5c SL |
2093 | if (!test_bit(Journal, &rdev->flags) && |
2094 | rdev->sectors && | |
2095 | (mddev->dev_sectors == 0 || rdev->sectors < mddev->dev_sectors)) { | |
a778b73f N |
2096 | if (mddev->pers) { |
2097 | /* Cannot change size, so fail | |
2098 | * If mddev->level <= 0, then we don't care | |
2099 | * about aligning sizes (e.g. linear) | |
2100 | */ | |
2101 | if (mddev->level > 0) | |
2102 | return -ENOSPC; | |
2103 | } else | |
dd8ac336 | 2104 | mddev->dev_sectors = rdev->sectors; |
2bf071bf | 2105 | } |
1da177e4 LT |
2106 | |
2107 | /* Verify rdev->desc_nr is unique. | |
2108 | * If it is -1, assign a free number, else | |
2109 | * check number is not in use | |
2110 | */ | |
4878e9eb | 2111 | rcu_read_lock(); |
1da177e4 LT |
2112 | if (rdev->desc_nr < 0) { |
2113 | int choice = 0; | |
4878e9eb N |
2114 | if (mddev->pers) |
2115 | choice = mddev->raid_disks; | |
57d051dc | 2116 | while (md_find_rdev_nr_rcu(mddev, choice)) |
1da177e4 LT |
2117 | choice++; |
2118 | rdev->desc_nr = choice; | |
2119 | } else { | |
57d051dc | 2120 | if (md_find_rdev_nr_rcu(mddev, rdev->desc_nr)) { |
4878e9eb | 2121 | rcu_read_unlock(); |
1da177e4 | 2122 | return -EBUSY; |
4878e9eb | 2123 | } |
1da177e4 | 2124 | } |
4878e9eb | 2125 | rcu_read_unlock(); |
f6b6ec5c SL |
2126 | if (!test_bit(Journal, &rdev->flags) && |
2127 | mddev->max_disks && rdev->desc_nr >= mddev->max_disks) { | |
9d48739e N |
2128 | pr_warn("md: %s: array is limited to %d devices\n", |
2129 | mdname(mddev), mddev->max_disks); | |
de01dfad N |
2130 | return -EBUSY; |
2131 | } | |
19133a42 | 2132 | bdevname(rdev->bdev,b); |
90a9befb | 2133 | strreplace(b, '/', '!'); |
649316b2 | 2134 | |
1da177e4 | 2135 | rdev->mddev = mddev; |
9d48739e | 2136 | pr_debug("md: bind<%s>\n", b); |
86e6ffdd | 2137 | |
b2d6db58 | 2138 | if ((err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b))) |
5e55e2f5 | 2139 | goto fail; |
86e6ffdd | 2140 | |
0762b8bd | 2141 | ko = &part_to_dev(rdev->bdev->bd_part)->kobj; |
00bcb4ac N |
2142 | if (sysfs_create_link(&rdev->kobj, ko, "block")) |
2143 | /* failure here is OK */; | |
2144 | rdev->sysfs_state = sysfs_get_dirent_safe(rdev->kobj.sd, "state"); | |
3c0ee63a | 2145 | |
4b80991c | 2146 | list_add_rcu(&rdev->same_set, &mddev->disks); |
e09b457b | 2147 | bd_link_disk_holder(rdev->bdev, mddev->gendisk); |
4044ba58 N |
2148 | |
2149 | /* May as well allow recovery to be retried once */ | |
5389042f | 2150 | mddev->recovery_disabled++; |
3f9d99c1 | 2151 | |
1da177e4 | 2152 | return 0; |
5e55e2f5 N |
2153 | |
2154 | fail: | |
9d48739e N |
2155 | pr_warn("md: failed to register dev-%s for %s\n", |
2156 | b, mdname(mddev)); | |
5e55e2f5 | 2157 | return err; |
1da177e4 LT |
2158 | } |
2159 | ||
177a99b2 | 2160 | static void md_delayed_delete(struct work_struct *ws) |
5792a285 | 2161 | { |
3cb03002 | 2162 | struct md_rdev *rdev = container_of(ws, struct md_rdev, del_work); |
5792a285 | 2163 | kobject_del(&rdev->kobj); |
177a99b2 | 2164 | kobject_put(&rdev->kobj); |
5792a285 N |
2165 | } |
2166 | ||
f72ffdd6 | 2167 | static void unbind_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2168 | { |
2169 | char b[BDEVNAME_SIZE]; | |
403df478 | 2170 | |
49731baa | 2171 | bd_unlink_disk_holder(rdev->bdev, rdev->mddev->gendisk); |
4b80991c | 2172 | list_del_rcu(&rdev->same_set); |
9d48739e | 2173 | pr_debug("md: unbind<%s>\n", bdevname(rdev->bdev,b)); |
1da177e4 | 2174 | rdev->mddev = NULL; |
86e6ffdd | 2175 | sysfs_remove_link(&rdev->kobj, "block"); |
3c0ee63a N |
2176 | sysfs_put(rdev->sysfs_state); |
2177 | rdev->sysfs_state = NULL; | |
2230dfe4 | 2178 | rdev->badblocks.count = 0; |
5792a285 | 2179 | /* We need to delay this, otherwise we can deadlock when |
4b80991c N |
2180 | * writing to 'remove' to "dev/state". We also need |
2181 | * to delay it due to rcu usage. | |
5792a285 | 2182 | */ |
4b80991c | 2183 | synchronize_rcu(); |
177a99b2 N |
2184 | INIT_WORK(&rdev->del_work, md_delayed_delete); |
2185 | kobject_get(&rdev->kobj); | |
e804ac78 | 2186 | queue_work(md_misc_wq, &rdev->del_work); |
1da177e4 LT |
2187 | } |
2188 | ||
2189 | /* | |
2190 | * prevent the device from being mounted, repartitioned or | |
2191 | * otherwise reused by a RAID array (or any other kernel | |
2192 | * subsystem), by bd_claiming the device. | |
2193 | */ | |
3cb03002 | 2194 | static int lock_rdev(struct md_rdev *rdev, dev_t dev, int shared) |
1da177e4 LT |
2195 | { |
2196 | int err = 0; | |
2197 | struct block_device *bdev; | |
2198 | char b[BDEVNAME_SIZE]; | |
2199 | ||
d4d77629 | 2200 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, |
3cb03002 | 2201 | shared ? (struct md_rdev *)lock_rdev : rdev); |
1da177e4 | 2202 | if (IS_ERR(bdev)) { |
9d48739e | 2203 | pr_warn("md: could not open %s.\n", __bdevname(dev, b)); |
1da177e4 LT |
2204 | return PTR_ERR(bdev); |
2205 | } | |
1da177e4 LT |
2206 | rdev->bdev = bdev; |
2207 | return err; | |
2208 | } | |
2209 | ||
3cb03002 | 2210 | static void unlock_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2211 | { |
2212 | struct block_device *bdev = rdev->bdev; | |
2213 | rdev->bdev = NULL; | |
e525fd89 | 2214 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
1da177e4 LT |
2215 | } |
2216 | ||
2217 | void md_autodetect_dev(dev_t dev); | |
2218 | ||
f72ffdd6 | 2219 | static void export_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2220 | { |
2221 | char b[BDEVNAME_SIZE]; | |
403df478 | 2222 | |
9d48739e | 2223 | pr_debug("md: export_rdev(%s)\n", bdevname(rdev->bdev,b)); |
545c8795 | 2224 | md_rdev_clear(rdev); |
1da177e4 | 2225 | #ifndef MODULE |
d0fae18f N |
2226 | if (test_bit(AutoDetected, &rdev->flags)) |
2227 | md_autodetect_dev(rdev->bdev->bd_dev); | |
1da177e4 LT |
2228 | #endif |
2229 | unlock_rdev(rdev); | |
86e6ffdd | 2230 | kobject_put(&rdev->kobj); |
1da177e4 LT |
2231 | } |
2232 | ||
fb56dfef | 2233 | void md_kick_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2234 | { |
2235 | unbind_rdev_from_array(rdev); | |
2236 | export_rdev(rdev); | |
2237 | } | |
fb56dfef | 2238 | EXPORT_SYMBOL_GPL(md_kick_rdev_from_array); |
1da177e4 | 2239 | |
fd01b88c | 2240 | static void export_array(struct mddev *mddev) |
1da177e4 | 2241 | { |
0638bb0e | 2242 | struct md_rdev *rdev; |
1da177e4 | 2243 | |
0638bb0e N |
2244 | while (!list_empty(&mddev->disks)) { |
2245 | rdev = list_first_entry(&mddev->disks, struct md_rdev, | |
2246 | same_set); | |
fb56dfef | 2247 | md_kick_rdev_from_array(rdev); |
1da177e4 | 2248 | } |
1da177e4 LT |
2249 | mddev->raid_disks = 0; |
2250 | mddev->major_version = 0; | |
2251 | } | |
2252 | ||
f72ffdd6 | 2253 | static void sync_sbs(struct mddev *mddev, int nospares) |
1da177e4 | 2254 | { |
42543769 N |
2255 | /* Update each superblock (in-memory image), but |
2256 | * if we are allowed to, skip spares which already | |
2257 | * have the right event counter, or have one earlier | |
2258 | * (which would mean they aren't being marked as dirty | |
2259 | * with the rest of the array) | |
2260 | */ | |
3cb03002 | 2261 | struct md_rdev *rdev; |
dafb20fa | 2262 | rdev_for_each(rdev, mddev) { |
42543769 N |
2263 | if (rdev->sb_events == mddev->events || |
2264 | (nospares && | |
2265 | rdev->raid_disk < 0 && | |
42543769 N |
2266 | rdev->sb_events+1 == mddev->events)) { |
2267 | /* Don't update this superblock */ | |
2268 | rdev->sb_loaded = 2; | |
2269 | } else { | |
076f968b | 2270 | sync_super(mddev, rdev); |
42543769 N |
2271 | rdev->sb_loaded = 1; |
2272 | } | |
1da177e4 LT |
2273 | } |
2274 | } | |
2275 | ||
2aa82191 GR |
2276 | static bool does_sb_need_changing(struct mddev *mddev) |
2277 | { | |
2278 | struct md_rdev *rdev; | |
2279 | struct mdp_superblock_1 *sb; | |
2280 | int role; | |
2281 | ||
2282 | /* Find a good rdev */ | |
2283 | rdev_for_each(rdev, mddev) | |
2284 | if ((rdev->raid_disk >= 0) && !test_bit(Faulty, &rdev->flags)) | |
2285 | break; | |
2286 | ||
2287 | /* No good device found. */ | |
2288 | if (!rdev) | |
2289 | return false; | |
2290 | ||
2291 | sb = page_address(rdev->sb_page); | |
2292 | /* Check if a device has become faulty or a spare become active */ | |
2293 | rdev_for_each(rdev, mddev) { | |
2294 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
2295 | /* Device activated? */ | |
2296 | if (role == 0xffff && rdev->raid_disk >=0 && | |
2297 | !test_bit(Faulty, &rdev->flags)) | |
2298 | return true; | |
2299 | /* Device turned faulty? */ | |
2300 | if (test_bit(Faulty, &rdev->flags) && (role < 0xfffd)) | |
2301 | return true; | |
2302 | } | |
2303 | ||
2304 | /* Check if any mddev parameters have changed */ | |
2305 | if ((mddev->dev_sectors != le64_to_cpu(sb->size)) || | |
2306 | (mddev->reshape_position != le64_to_cpu(sb->reshape_position)) || | |
2aa82191 GR |
2307 | (mddev->layout != le64_to_cpu(sb->layout)) || |
2308 | (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) || | |
2309 | (mddev->chunk_sectors != le32_to_cpu(sb->chunksize))) | |
2310 | return true; | |
2311 | ||
2312 | return false; | |
2313 | } | |
2314 | ||
1aee41f6 | 2315 | void md_update_sb(struct mddev *mddev, int force_change) |
1da177e4 | 2316 | { |
3cb03002 | 2317 | struct md_rdev *rdev; |
06d91a5f | 2318 | int sync_req; |
42543769 | 2319 | int nospares = 0; |
2699b672 | 2320 | int any_badblocks_changed = 0; |
23b63f9f | 2321 | int ret = -1; |
1da177e4 | 2322 | |
d87f064f N |
2323 | if (mddev->ro) { |
2324 | if (force_change) | |
2953079c | 2325 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
d87f064f N |
2326 | return; |
2327 | } | |
2aa82191 | 2328 | |
2c97cf13 | 2329 | repeat: |
2aa82191 | 2330 | if (mddev_is_clustered(mddev)) { |
2953079c | 2331 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
2aa82191 | 2332 | force_change = 1; |
2953079c | 2333 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
85ad1d13 | 2334 | nospares = 1; |
23b63f9f | 2335 | ret = md_cluster_ops->metadata_update_start(mddev); |
2aa82191 GR |
2336 | /* Has someone else has updated the sb */ |
2337 | if (!does_sb_need_changing(mddev)) { | |
23b63f9f GJ |
2338 | if (ret == 0) |
2339 | md_cluster_ops->metadata_update_cancel(mddev); | |
2953079c SL |
2340 | bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2341 | BIT(MD_SB_CHANGE_DEVS) | | |
2342 | BIT(MD_SB_CHANGE_CLEAN)); | |
2aa82191 GR |
2343 | return; |
2344 | } | |
2345 | } | |
2c97cf13 | 2346 | |
3a3a5ddb | 2347 | /* First make sure individual recovery_offsets are correct */ |
dafb20fa | 2348 | rdev_for_each(rdev, mddev) { |
3a3a5ddb N |
2349 | if (rdev->raid_disk >= 0 && |
2350 | mddev->delta_disks >= 0 && | |
f2076e7d | 2351 | !test_bit(Journal, &rdev->flags) && |
3a3a5ddb N |
2352 | !test_bit(In_sync, &rdev->flags) && |
2353 | mddev->curr_resync_completed > rdev->recovery_offset) | |
2354 | rdev->recovery_offset = mddev->curr_resync_completed; | |
2355 | ||
f72ffdd6 | 2356 | } |
bd52b746 | 2357 | if (!mddev->persistent) { |
2953079c SL |
2358 | clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2359 | clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
de393cde | 2360 | if (!mddev->external) { |
2953079c | 2361 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
dafb20fa | 2362 | rdev_for_each(rdev, mddev) { |
de393cde | 2363 | if (rdev->badblocks.changed) { |
d0962936 | 2364 | rdev->badblocks.changed = 0; |
fc974ee2 | 2365 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2366 | md_error(mddev, rdev); |
2367 | } | |
2368 | clear_bit(Blocked, &rdev->flags); | |
2369 | clear_bit(BlockedBadBlocks, &rdev->flags); | |
2370 | wake_up(&rdev->blocked_wait); | |
2371 | } | |
2372 | } | |
3a3a5ddb N |
2373 | wake_up(&mddev->sb_wait); |
2374 | return; | |
2375 | } | |
2376 | ||
85572d7c | 2377 | spin_lock(&mddev->lock); |
84692195 | 2378 | |
9ebc6ef1 | 2379 | mddev->utime = ktime_get_real_seconds(); |
3a3a5ddb | 2380 | |
2953079c | 2381 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
850b2b42 | 2382 | force_change = 1; |
2953079c | 2383 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
850b2b42 N |
2384 | /* just a clean<-> dirty transition, possibly leave spares alone, |
2385 | * though if events isn't the right even/odd, we will have to do | |
2386 | * spares after all | |
2387 | */ | |
2388 | nospares = 1; | |
2389 | if (force_change) | |
2390 | nospares = 0; | |
2391 | if (mddev->degraded) | |
84692195 N |
2392 | /* If the array is degraded, then skipping spares is both |
2393 | * dangerous and fairly pointless. | |
2394 | * Dangerous because a device that was removed from the array | |
2395 | * might have a event_count that still looks up-to-date, | |
2396 | * so it can be re-added without a resync. | |
2397 | * Pointless because if there are any spares to skip, | |
2398 | * then a recovery will happen and soon that array won't | |
2399 | * be degraded any more and the spare can go back to sleep then. | |
2400 | */ | |
850b2b42 | 2401 | nospares = 0; |
84692195 | 2402 | |
06d91a5f | 2403 | sync_req = mddev->in_sync; |
42543769 N |
2404 | |
2405 | /* If this is just a dirty<->clean transition, and the array is clean | |
2406 | * and 'events' is odd, we can roll back to the previous clean state */ | |
850b2b42 | 2407 | if (nospares |
42543769 | 2408 | && (mddev->in_sync && mddev->recovery_cp == MaxSector) |
a8707c08 N |
2409 | && mddev->can_decrease_events |
2410 | && mddev->events != 1) { | |
42543769 | 2411 | mddev->events--; |
a8707c08 N |
2412 | mddev->can_decrease_events = 0; |
2413 | } else { | |
42543769 N |
2414 | /* otherwise we have to go forward and ... */ |
2415 | mddev->events ++; | |
a8707c08 | 2416 | mddev->can_decrease_events = nospares; |
42543769 | 2417 | } |
1da177e4 | 2418 | |
403df478 N |
2419 | /* |
2420 | * This 64-bit counter should never wrap. | |
2421 | * Either we are in around ~1 trillion A.C., assuming | |
2422 | * 1 reboot per second, or we have a bug... | |
2423 | */ | |
2424 | WARN_ON(mddev->events == 0); | |
2699b672 | 2425 | |
dafb20fa | 2426 | rdev_for_each(rdev, mddev) { |
2699b672 N |
2427 | if (rdev->badblocks.changed) |
2428 | any_badblocks_changed++; | |
de393cde N |
2429 | if (test_bit(Faulty, &rdev->flags)) |
2430 | set_bit(FaultRecorded, &rdev->flags); | |
2431 | } | |
2699b672 | 2432 | |
e691063a | 2433 | sync_sbs(mddev, nospares); |
85572d7c | 2434 | spin_unlock(&mddev->lock); |
1da177e4 | 2435 | |
36a4e1fe N |
2436 | pr_debug("md: updating %s RAID superblock on device (in sync %d)\n", |
2437 | mdname(mddev), mddev->in_sync); | |
1da177e4 | 2438 | |
504634f6 SL |
2439 | if (mddev->queue) |
2440 | blk_add_trace_msg(mddev->queue, "md md_update_sb"); | |
46533ff7 | 2441 | rewrite: |
4ad13663 | 2442 | bitmap_update_sb(mddev->bitmap); |
dafb20fa | 2443 | rdev_for_each(rdev, mddev) { |
1da177e4 | 2444 | char b[BDEVNAME_SIZE]; |
36a4e1fe | 2445 | |
42543769 N |
2446 | if (rdev->sb_loaded != 1) |
2447 | continue; /* no noise on spare devices */ | |
1da177e4 | 2448 | |
f466722c | 2449 | if (!test_bit(Faulty, &rdev->flags)) { |
7bfa19f2 | 2450 | md_super_write(mddev,rdev, |
0f420358 | 2451 | rdev->sb_start, rdev->sb_size, |
7bfa19f2 | 2452 | rdev->sb_page); |
36a4e1fe N |
2453 | pr_debug("md: (write) %s's sb offset: %llu\n", |
2454 | bdevname(rdev->bdev, b), | |
2455 | (unsigned long long)rdev->sb_start); | |
42543769 | 2456 | rdev->sb_events = mddev->events; |
2699b672 N |
2457 | if (rdev->badblocks.size) { |
2458 | md_super_write(mddev, rdev, | |
2459 | rdev->badblocks.sector, | |
2460 | rdev->badblocks.size << 9, | |
2461 | rdev->bb_page); | |
2462 | rdev->badblocks.size = 0; | |
2463 | } | |
7bfa19f2 | 2464 | |
f466722c | 2465 | } else |
36a4e1fe N |
2466 | pr_debug("md: %s (skipping faulty)\n", |
2467 | bdevname(rdev->bdev, b)); | |
d70ed2e4 | 2468 | |
7bfa19f2 | 2469 | if (mddev->level == LEVEL_MULTIPATH) |
1da177e4 LT |
2470 | /* only need to write one superblock... */ |
2471 | break; | |
2472 | } | |
46533ff7 N |
2473 | if (md_super_wait(mddev) < 0) |
2474 | goto rewrite; | |
2953079c | 2475 | /* if there was a failure, MD_SB_CHANGE_DEVS was set, and we re-write super */ |
7bfa19f2 | 2476 | |
2c97cf13 GJ |
2477 | if (mddev_is_clustered(mddev) && ret == 0) |
2478 | md_cluster_ops->metadata_update_finish(mddev); | |
2479 | ||
850b2b42 | 2480 | if (mddev->in_sync != sync_req || |
2953079c SL |
2481 | !bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2482 | BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_CLEAN))) | |
06d91a5f | 2483 | /* have to write it out again */ |
06d91a5f | 2484 | goto repeat; |
3d310eb7 | 2485 | wake_up(&mddev->sb_wait); |
acb180b0 N |
2486 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
2487 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); | |
06d91a5f | 2488 | |
dafb20fa | 2489 | rdev_for_each(rdev, mddev) { |
de393cde N |
2490 | if (test_and_clear_bit(FaultRecorded, &rdev->flags)) |
2491 | clear_bit(Blocked, &rdev->flags); | |
2492 | ||
2493 | if (any_badblocks_changed) | |
fc974ee2 | 2494 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2495 | clear_bit(BlockedBadBlocks, &rdev->flags); |
2496 | wake_up(&rdev->blocked_wait); | |
2497 | } | |
1da177e4 | 2498 | } |
1aee41f6 | 2499 | EXPORT_SYMBOL(md_update_sb); |
1da177e4 | 2500 | |
a6da4ef8 GR |
2501 | static int add_bound_rdev(struct md_rdev *rdev) |
2502 | { | |
2503 | struct mddev *mddev = rdev->mddev; | |
2504 | int err = 0; | |
87d4d916 | 2505 | bool add_journal = test_bit(Journal, &rdev->flags); |
a6da4ef8 | 2506 | |
87d4d916 | 2507 | if (!mddev->pers->hot_remove_disk || add_journal) { |
a6da4ef8 GR |
2508 | /* If there is hot_add_disk but no hot_remove_disk |
2509 | * then added disks for geometry changes, | |
2510 | * and should be added immediately. | |
2511 | */ | |
2512 | super_types[mddev->major_version]. | |
2513 | validate_super(mddev, rdev); | |
87d4d916 SL |
2514 | if (add_journal) |
2515 | mddev_suspend(mddev); | |
a6da4ef8 | 2516 | err = mddev->pers->hot_add_disk(mddev, rdev); |
87d4d916 SL |
2517 | if (add_journal) |
2518 | mddev_resume(mddev); | |
a6da4ef8 | 2519 | if (err) { |
db767672 | 2520 | md_kick_rdev_from_array(rdev); |
a6da4ef8 GR |
2521 | return err; |
2522 | } | |
2523 | } | |
2524 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2525 | ||
2953079c | 2526 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a6da4ef8 GR |
2527 | if (mddev->degraded) |
2528 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
2529 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
2530 | md_new_event(mddev); | |
2531 | md_wakeup_thread(mddev->thread); | |
2532 | return 0; | |
2533 | } | |
1da177e4 | 2534 | |
7f6ce769 | 2535 | /* words written to sysfs files may, or may not, be \n terminated. |
bce74dac N |
2536 | * We want to accept with case. For this we use cmd_match. |
2537 | */ | |
2538 | static int cmd_match(const char *cmd, const char *str) | |
2539 | { | |
2540 | /* See if cmd, written into a sysfs file, matches | |
2541 | * str. They must either be the same, or cmd can | |
2542 | * have a trailing newline | |
2543 | */ | |
2544 | while (*cmd && *str && *cmd == *str) { | |
2545 | cmd++; | |
2546 | str++; | |
2547 | } | |
2548 | if (*cmd == '\n') | |
2549 | cmd++; | |
2550 | if (*str || *cmd) | |
2551 | return 0; | |
2552 | return 1; | |
2553 | } | |
2554 | ||
86e6ffdd N |
2555 | struct rdev_sysfs_entry { |
2556 | struct attribute attr; | |
3cb03002 N |
2557 | ssize_t (*show)(struct md_rdev *, char *); |
2558 | ssize_t (*store)(struct md_rdev *, const char *, size_t); | |
86e6ffdd N |
2559 | }; |
2560 | ||
2561 | static ssize_t | |
3cb03002 | 2562 | state_show(struct md_rdev *rdev, char *page) |
86e6ffdd | 2563 | { |
35b785f7 | 2564 | char *sep = ","; |
20a49ff6 | 2565 | size_t len = 0; |
758bfc8a | 2566 | unsigned long flags = ACCESS_ONCE(rdev->flags); |
86e6ffdd | 2567 | |
758bfc8a | 2568 | if (test_bit(Faulty, &flags) || |
dcbcb486 TM |
2569 | (!test_bit(ExternalBbl, &flags) && |
2570 | rdev->badblocks.unacked_exist)) | |
35b785f7 TM |
2571 | len += sprintf(page+len, "faulty%s", sep); |
2572 | if (test_bit(In_sync, &flags)) | |
2573 | len += sprintf(page+len, "in_sync%s", sep); | |
2574 | if (test_bit(Journal, &flags)) | |
2575 | len += sprintf(page+len, "journal%s", sep); | |
2576 | if (test_bit(WriteMostly, &flags)) | |
2577 | len += sprintf(page+len, "write_mostly%s", sep); | |
758bfc8a | 2578 | if (test_bit(Blocked, &flags) || |
52c64152 | 2579 | (rdev->badblocks.unacked_exist |
35b785f7 TM |
2580 | && !test_bit(Faulty, &flags))) |
2581 | len += sprintf(page+len, "blocked%s", sep); | |
758bfc8a | 2582 | if (!test_bit(Faulty, &flags) && |
f2076e7d | 2583 | !test_bit(Journal, &flags) && |
35b785f7 TM |
2584 | !test_bit(In_sync, &flags)) |
2585 | len += sprintf(page+len, "spare%s", sep); | |
2586 | if (test_bit(WriteErrorSeen, &flags)) | |
2587 | len += sprintf(page+len, "write_error%s", sep); | |
2588 | if (test_bit(WantReplacement, &flags)) | |
2589 | len += sprintf(page+len, "want_replacement%s", sep); | |
2590 | if (test_bit(Replacement, &flags)) | |
2591 | len += sprintf(page+len, "replacement%s", sep); | |
2592 | if (test_bit(ExternalBbl, &flags)) | |
2593 | len += sprintf(page+len, "external_bbl%s", sep); | |
688834e6 N |
2594 | if (test_bit(FailFast, &flags)) |
2595 | len += sprintf(page+len, "failfast%s", sep); | |
35b785f7 TM |
2596 | |
2597 | if (len) | |
2598 | len -= strlen(sep); | |
2d78f8c4 | 2599 | |
86e6ffdd N |
2600 | return len+sprintf(page+len, "\n"); |
2601 | } | |
2602 | ||
45dc2de1 | 2603 | static ssize_t |
3cb03002 | 2604 | state_store(struct md_rdev *rdev, const char *buf, size_t len) |
45dc2de1 N |
2605 | { |
2606 | /* can write | |
de393cde | 2607 | * faulty - simulates an error |
45dc2de1 | 2608 | * remove - disconnects the device |
f655675b N |
2609 | * writemostly - sets write_mostly |
2610 | * -writemostly - clears write_mostly | |
de393cde N |
2611 | * blocked - sets the Blocked flags |
2612 | * -blocked - clears the Blocked and possibly simulates an error | |
6d56e278 | 2613 | * insync - sets Insync providing device isn't active |
f466722c N |
2614 | * -insync - clear Insync for a device with a slot assigned, |
2615 | * so that it gets rebuilt based on bitmap | |
d7a9d443 N |
2616 | * write_error - sets WriteErrorSeen |
2617 | * -write_error - clears WriteErrorSeen | |
688834e6 | 2618 | * {,-}failfast - set/clear FailFast |
45dc2de1 N |
2619 | */ |
2620 | int err = -EINVAL; | |
2621 | if (cmd_match(buf, "faulty") && rdev->mddev->pers) { | |
2622 | md_error(rdev->mddev, rdev); | |
5ef56c8f N |
2623 | if (test_bit(Faulty, &rdev->flags)) |
2624 | err = 0; | |
2625 | else | |
2626 | err = -EBUSY; | |
45dc2de1 | 2627 | } else if (cmd_match(buf, "remove")) { |
5d881783 SL |
2628 | if (rdev->mddev->pers) { |
2629 | clear_bit(Blocked, &rdev->flags); | |
2630 | remove_and_add_spares(rdev->mddev, rdev); | |
2631 | } | |
45dc2de1 N |
2632 | if (rdev->raid_disk >= 0) |
2633 | err = -EBUSY; | |
2634 | else { | |
fd01b88c | 2635 | struct mddev *mddev = rdev->mddev; |
45dc2de1 | 2636 | err = 0; |
a9720903 GJ |
2637 | if (mddev_is_clustered(mddev)) |
2638 | err = md_cluster_ops->remove_disk(mddev, rdev); | |
2639 | ||
2640 | if (err == 0) { | |
2641 | md_kick_rdev_from_array(rdev); | |
060b0689 | 2642 | if (mddev->pers) { |
2953079c | 2643 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
2644 | md_wakeup_thread(mddev->thread); |
2645 | } | |
a9720903 GJ |
2646 | md_new_event(mddev); |
2647 | } | |
45dc2de1 | 2648 | } |
f655675b N |
2649 | } else if (cmd_match(buf, "writemostly")) { |
2650 | set_bit(WriteMostly, &rdev->flags); | |
2651 | err = 0; | |
2652 | } else if (cmd_match(buf, "-writemostly")) { | |
2653 | clear_bit(WriteMostly, &rdev->flags); | |
6bfe0b49 DW |
2654 | err = 0; |
2655 | } else if (cmd_match(buf, "blocked")) { | |
2656 | set_bit(Blocked, &rdev->flags); | |
2657 | err = 0; | |
2658 | } else if (cmd_match(buf, "-blocked")) { | |
de393cde | 2659 | if (!test_bit(Faulty, &rdev->flags) && |
dcbcb486 | 2660 | !test_bit(ExternalBbl, &rdev->flags) && |
7da64a0a | 2661 | rdev->badblocks.unacked_exist) { |
de393cde N |
2662 | /* metadata handler doesn't understand badblocks, |
2663 | * so we need to fail the device | |
2664 | */ | |
2665 | md_error(rdev->mddev, rdev); | |
2666 | } | |
6bfe0b49 | 2667 | clear_bit(Blocked, &rdev->flags); |
de393cde | 2668 | clear_bit(BlockedBadBlocks, &rdev->flags); |
6bfe0b49 DW |
2669 | wake_up(&rdev->blocked_wait); |
2670 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
2671 | md_wakeup_thread(rdev->mddev->thread); | |
2672 | ||
6d56e278 N |
2673 | err = 0; |
2674 | } else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) { | |
2675 | set_bit(In_sync, &rdev->flags); | |
f655675b | 2676 | err = 0; |
688834e6 N |
2677 | } else if (cmd_match(buf, "failfast")) { |
2678 | set_bit(FailFast, &rdev->flags); | |
2679 | err = 0; | |
2680 | } else if (cmd_match(buf, "-failfast")) { | |
2681 | clear_bit(FailFast, &rdev->flags); | |
2682 | err = 0; | |
f2076e7d SL |
2683 | } else if (cmd_match(buf, "-insync") && rdev->raid_disk >= 0 && |
2684 | !test_bit(Journal, &rdev->flags)) { | |
e1960f8c N |
2685 | if (rdev->mddev->pers == NULL) { |
2686 | clear_bit(In_sync, &rdev->flags); | |
2687 | rdev->saved_raid_disk = rdev->raid_disk; | |
2688 | rdev->raid_disk = -1; | |
2689 | err = 0; | |
2690 | } | |
d7a9d443 N |
2691 | } else if (cmd_match(buf, "write_error")) { |
2692 | set_bit(WriteErrorSeen, &rdev->flags); | |
2693 | err = 0; | |
2694 | } else if (cmd_match(buf, "-write_error")) { | |
2695 | clear_bit(WriteErrorSeen, &rdev->flags); | |
2696 | err = 0; | |
2d78f8c4 N |
2697 | } else if (cmd_match(buf, "want_replacement")) { |
2698 | /* Any non-spare device that is not a replacement can | |
2699 | * become want_replacement at any time, but we then need to | |
2700 | * check if recovery is needed. | |
2701 | */ | |
2702 | if (rdev->raid_disk >= 0 && | |
f2076e7d | 2703 | !test_bit(Journal, &rdev->flags) && |
2d78f8c4 N |
2704 | !test_bit(Replacement, &rdev->flags)) |
2705 | set_bit(WantReplacement, &rdev->flags); | |
2706 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
2707 | md_wakeup_thread(rdev->mddev->thread); | |
2708 | err = 0; | |
2709 | } else if (cmd_match(buf, "-want_replacement")) { | |
2710 | /* Clearing 'want_replacement' is always allowed. | |
2711 | * Once replacements starts it is too late though. | |
2712 | */ | |
2713 | err = 0; | |
2714 | clear_bit(WantReplacement, &rdev->flags); | |
2715 | } else if (cmd_match(buf, "replacement")) { | |
2716 | /* Can only set a device as a replacement when array has not | |
2717 | * yet been started. Once running, replacement is automatic | |
2718 | * from spares, or by assigning 'slot'. | |
2719 | */ | |
2720 | if (rdev->mddev->pers) | |
2721 | err = -EBUSY; | |
2722 | else { | |
2723 | set_bit(Replacement, &rdev->flags); | |
2724 | err = 0; | |
2725 | } | |
2726 | } else if (cmd_match(buf, "-replacement")) { | |
2727 | /* Similarly, can only clear Replacement before start */ | |
2728 | if (rdev->mddev->pers) | |
2729 | err = -EBUSY; | |
2730 | else { | |
2731 | clear_bit(Replacement, &rdev->flags); | |
2732 | err = 0; | |
2733 | } | |
a6da4ef8 GR |
2734 | } else if (cmd_match(buf, "re-add")) { |
2735 | if (test_bit(Faulty, &rdev->flags) && (rdev->raid_disk == -1)) { | |
97f6cd39 GR |
2736 | /* clear_bit is performed _after_ all the devices |
2737 | * have their local Faulty bit cleared. If any writes | |
2738 | * happen in the meantime in the local node, they | |
2739 | * will land in the local bitmap, which will be synced | |
2740 | * by this node eventually | |
2741 | */ | |
2742 | if (!mddev_is_clustered(rdev->mddev) || | |
2743 | (err = md_cluster_ops->gather_bitmaps(rdev)) == 0) { | |
2744 | clear_bit(Faulty, &rdev->flags); | |
2745 | err = add_bound_rdev(rdev); | |
2746 | } | |
a6da4ef8 GR |
2747 | } else |
2748 | err = -EBUSY; | |
35b785f7 TM |
2749 | } else if (cmd_match(buf, "external_bbl") && (rdev->mddev->external)) { |
2750 | set_bit(ExternalBbl, &rdev->flags); | |
2751 | rdev->badblocks.shift = 0; | |
2752 | err = 0; | |
2753 | } else if (cmd_match(buf, "-external_bbl") && (rdev->mddev->external)) { | |
2754 | clear_bit(ExternalBbl, &rdev->flags); | |
2755 | err = 0; | |
45dc2de1 | 2756 | } |
00bcb4ac N |
2757 | if (!err) |
2758 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
45dc2de1 N |
2759 | return err ? err : len; |
2760 | } | |
80ca3a44 | 2761 | static struct rdev_sysfs_entry rdev_state = |
750f199e | 2762 | __ATTR_PREALLOC(state, S_IRUGO|S_IWUSR, state_show, state_store); |
86e6ffdd | 2763 | |
4dbcdc75 | 2764 | static ssize_t |
3cb03002 | 2765 | errors_show(struct md_rdev *rdev, char *page) |
4dbcdc75 N |
2766 | { |
2767 | return sprintf(page, "%d\n", atomic_read(&rdev->corrected_errors)); | |
2768 | } | |
2769 | ||
2770 | static ssize_t | |
3cb03002 | 2771 | errors_store(struct md_rdev *rdev, const char *buf, size_t len) |
4dbcdc75 | 2772 | { |
4c9309c0 AD |
2773 | unsigned int n; |
2774 | int rv; | |
2775 | ||
2776 | rv = kstrtouint(buf, 10, &n); | |
2777 | if (rv < 0) | |
2778 | return rv; | |
2779 | atomic_set(&rdev->corrected_errors, n); | |
2780 | return len; | |
4dbcdc75 N |
2781 | } |
2782 | static struct rdev_sysfs_entry rdev_errors = | |
80ca3a44 | 2783 | __ATTR(errors, S_IRUGO|S_IWUSR, errors_show, errors_store); |
4dbcdc75 | 2784 | |
014236d2 | 2785 | static ssize_t |
3cb03002 | 2786 | slot_show(struct md_rdev *rdev, char *page) |
014236d2 | 2787 | { |
f2076e7d SL |
2788 | if (test_bit(Journal, &rdev->flags)) |
2789 | return sprintf(page, "journal\n"); | |
2790 | else if (rdev->raid_disk < 0) | |
014236d2 N |
2791 | return sprintf(page, "none\n"); |
2792 | else | |
2793 | return sprintf(page, "%d\n", rdev->raid_disk); | |
2794 | } | |
2795 | ||
2796 | static ssize_t | |
3cb03002 | 2797 | slot_store(struct md_rdev *rdev, const char *buf, size_t len) |
014236d2 | 2798 | { |
4c9309c0 | 2799 | int slot; |
c303da6d | 2800 | int err; |
4c9309c0 | 2801 | |
f2076e7d SL |
2802 | if (test_bit(Journal, &rdev->flags)) |
2803 | return -EBUSY; | |
014236d2 N |
2804 | if (strncmp(buf, "none", 4)==0) |
2805 | slot = -1; | |
4c9309c0 AD |
2806 | else { |
2807 | err = kstrtouint(buf, 10, (unsigned int *)&slot); | |
2808 | if (err < 0) | |
2809 | return err; | |
2810 | } | |
6c2fce2e | 2811 | if (rdev->mddev->pers && slot == -1) { |
c303da6d N |
2812 | /* Setting 'slot' on an active array requires also |
2813 | * updating the 'rd%d' link, and communicating | |
2814 | * with the personality with ->hot_*_disk. | |
2815 | * For now we only support removing | |
2816 | * failed/spare devices. This normally happens automatically, | |
2817 | * but not when the metadata is externally managed. | |
2818 | */ | |
c303da6d N |
2819 | if (rdev->raid_disk == -1) |
2820 | return -EEXIST; | |
2821 | /* personality does all needed checks */ | |
01393f3d | 2822 | if (rdev->mddev->pers->hot_remove_disk == NULL) |
c303da6d | 2823 | return -EINVAL; |
746d3207 N |
2824 | clear_bit(Blocked, &rdev->flags); |
2825 | remove_and_add_spares(rdev->mddev, rdev); | |
2826 | if (rdev->raid_disk >= 0) | |
2827 | return -EBUSY; | |
c303da6d N |
2828 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); |
2829 | md_wakeup_thread(rdev->mddev->thread); | |
6c2fce2e | 2830 | } else if (rdev->mddev->pers) { |
6c2fce2e | 2831 | /* Activating a spare .. or possibly reactivating |
6d56e278 | 2832 | * if we ever get bitmaps working here. |
6c2fce2e | 2833 | */ |
cb01c549 | 2834 | int err; |
6c2fce2e NB |
2835 | |
2836 | if (rdev->raid_disk != -1) | |
2837 | return -EBUSY; | |
2838 | ||
c6751b2b N |
2839 | if (test_bit(MD_RECOVERY_RUNNING, &rdev->mddev->recovery)) |
2840 | return -EBUSY; | |
2841 | ||
6c2fce2e NB |
2842 | if (rdev->mddev->pers->hot_add_disk == NULL) |
2843 | return -EINVAL; | |
2844 | ||
ba1b41b6 N |
2845 | if (slot >= rdev->mddev->raid_disks && |
2846 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
2847 | return -ENOSPC; | |
2848 | ||
6c2fce2e NB |
2849 | rdev->raid_disk = slot; |
2850 | if (test_bit(In_sync, &rdev->flags)) | |
2851 | rdev->saved_raid_disk = slot; | |
2852 | else | |
2853 | rdev->saved_raid_disk = -1; | |
d30519fc | 2854 | clear_bit(In_sync, &rdev->flags); |
8313b8e5 | 2855 | clear_bit(Bitmap_sync, &rdev->flags); |
cb01c549 GR |
2856 | err = rdev->mddev->pers-> |
2857 | hot_add_disk(rdev->mddev, rdev); | |
2858 | if (err) { | |
2859 | rdev->raid_disk = -1; | |
2860 | return err; | |
2861 | } else | |
2862 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2863 | if (sysfs_link_rdev(rdev->mddev, rdev)) | |
2864 | /* failure here is OK */; | |
6c2fce2e | 2865 | /* don't wakeup anyone, leave that to userspace. */ |
c303da6d | 2866 | } else { |
ba1b41b6 N |
2867 | if (slot >= rdev->mddev->raid_disks && |
2868 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
c303da6d N |
2869 | return -ENOSPC; |
2870 | rdev->raid_disk = slot; | |
2871 | /* assume it is working */ | |
c5d79adb N |
2872 | clear_bit(Faulty, &rdev->flags); |
2873 | clear_bit(WriteMostly, &rdev->flags); | |
c303da6d | 2874 | set_bit(In_sync, &rdev->flags); |
00bcb4ac | 2875 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
c303da6d | 2876 | } |
014236d2 N |
2877 | return len; |
2878 | } | |
2879 | ||
014236d2 | 2880 | static struct rdev_sysfs_entry rdev_slot = |
80ca3a44 | 2881 | __ATTR(slot, S_IRUGO|S_IWUSR, slot_show, slot_store); |
014236d2 | 2882 | |
93c8cad0 | 2883 | static ssize_t |
3cb03002 | 2884 | offset_show(struct md_rdev *rdev, char *page) |
93c8cad0 | 2885 | { |
6961ece4 | 2886 | return sprintf(page, "%llu\n", (unsigned long long)rdev->data_offset); |
93c8cad0 N |
2887 | } |
2888 | ||
2889 | static ssize_t | |
3cb03002 | 2890 | offset_store(struct md_rdev *rdev, const char *buf, size_t len) |
93c8cad0 | 2891 | { |
c6563a8c | 2892 | unsigned long long offset; |
b29bebd6 | 2893 | if (kstrtoull(buf, 10, &offset) < 0) |
93c8cad0 | 2894 | return -EINVAL; |
8ed0a521 | 2895 | if (rdev->mddev->pers && rdev->raid_disk >= 0) |
93c8cad0 | 2896 | return -EBUSY; |
dd8ac336 | 2897 | if (rdev->sectors && rdev->mddev->external) |
c5d79adb N |
2898 | /* Must set offset before size, so overlap checks |
2899 | * can be sane */ | |
2900 | return -EBUSY; | |
93c8cad0 | 2901 | rdev->data_offset = offset; |
25f7fd47 | 2902 | rdev->new_data_offset = offset; |
93c8cad0 N |
2903 | return len; |
2904 | } | |
2905 | ||
2906 | static struct rdev_sysfs_entry rdev_offset = | |
80ca3a44 | 2907 | __ATTR(offset, S_IRUGO|S_IWUSR, offset_show, offset_store); |
93c8cad0 | 2908 | |
c6563a8c N |
2909 | static ssize_t new_offset_show(struct md_rdev *rdev, char *page) |
2910 | { | |
2911 | return sprintf(page, "%llu\n", | |
2912 | (unsigned long long)rdev->new_data_offset); | |
2913 | } | |
2914 | ||
2915 | static ssize_t new_offset_store(struct md_rdev *rdev, | |
2916 | const char *buf, size_t len) | |
2917 | { | |
2918 | unsigned long long new_offset; | |
2919 | struct mddev *mddev = rdev->mddev; | |
2920 | ||
b29bebd6 | 2921 | if (kstrtoull(buf, 10, &new_offset) < 0) |
c6563a8c N |
2922 | return -EINVAL; |
2923 | ||
f851b60d N |
2924 | if (mddev->sync_thread || |
2925 | test_bit(MD_RECOVERY_RUNNING,&mddev->recovery)) | |
c6563a8c N |
2926 | return -EBUSY; |
2927 | if (new_offset == rdev->data_offset) | |
2928 | /* reset is always permitted */ | |
2929 | ; | |
2930 | else if (new_offset > rdev->data_offset) { | |
2931 | /* must not push array size beyond rdev_sectors */ | |
2932 | if (new_offset - rdev->data_offset | |
2933 | + mddev->dev_sectors > rdev->sectors) | |
2934 | return -E2BIG; | |
2935 | } | |
2936 | /* Metadata worries about other space details. */ | |
2937 | ||
2938 | /* decreasing the offset is inconsistent with a backwards | |
2939 | * reshape. | |
2940 | */ | |
2941 | if (new_offset < rdev->data_offset && | |
2942 | mddev->reshape_backwards) | |
2943 | return -EINVAL; | |
2944 | /* Increasing offset is inconsistent with forwards | |
2945 | * reshape. reshape_direction should be set to | |
2946 | * 'backwards' first. | |
2947 | */ | |
2948 | if (new_offset > rdev->data_offset && | |
2949 | !mddev->reshape_backwards) | |
2950 | return -EINVAL; | |
2951 | ||
2952 | if (mddev->pers && mddev->persistent && | |
2953 | !super_types[mddev->major_version] | |
2954 | .allow_new_offset(rdev, new_offset)) | |
2955 | return -E2BIG; | |
2956 | rdev->new_data_offset = new_offset; | |
2957 | if (new_offset > rdev->data_offset) | |
2958 | mddev->reshape_backwards = 1; | |
2959 | else if (new_offset < rdev->data_offset) | |
2960 | mddev->reshape_backwards = 0; | |
2961 | ||
2962 | return len; | |
2963 | } | |
2964 | static struct rdev_sysfs_entry rdev_new_offset = | |
2965 | __ATTR(new_offset, S_IRUGO|S_IWUSR, new_offset_show, new_offset_store); | |
2966 | ||
83303b61 | 2967 | static ssize_t |
3cb03002 | 2968 | rdev_size_show(struct md_rdev *rdev, char *page) |
83303b61 | 2969 | { |
dd8ac336 | 2970 | return sprintf(page, "%llu\n", (unsigned long long)rdev->sectors / 2); |
83303b61 N |
2971 | } |
2972 | ||
c5d79adb N |
2973 | static int overlaps(sector_t s1, sector_t l1, sector_t s2, sector_t l2) |
2974 | { | |
2975 | /* check if two start/length pairs overlap */ | |
2976 | if (s1+l1 <= s2) | |
2977 | return 0; | |
2978 | if (s2+l2 <= s1) | |
2979 | return 0; | |
2980 | return 1; | |
2981 | } | |
2982 | ||
b522adcd DW |
2983 | static int strict_blocks_to_sectors(const char *buf, sector_t *sectors) |
2984 | { | |
2985 | unsigned long long blocks; | |
2986 | sector_t new; | |
2987 | ||
b29bebd6 | 2988 | if (kstrtoull(buf, 10, &blocks) < 0) |
b522adcd DW |
2989 | return -EINVAL; |
2990 | ||
2991 | if (blocks & 1ULL << (8 * sizeof(blocks) - 1)) | |
2992 | return -EINVAL; /* sector conversion overflow */ | |
2993 | ||
2994 | new = blocks * 2; | |
2995 | if (new != blocks * 2) | |
2996 | return -EINVAL; /* unsigned long long to sector_t overflow */ | |
2997 | ||
2998 | *sectors = new; | |
2999 | return 0; | |
3000 | } | |
3001 | ||
83303b61 | 3002 | static ssize_t |
3cb03002 | 3003 | rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len) |
83303b61 | 3004 | { |
fd01b88c | 3005 | struct mddev *my_mddev = rdev->mddev; |
dd8ac336 | 3006 | sector_t oldsectors = rdev->sectors; |
b522adcd | 3007 | sector_t sectors; |
27c529bb | 3008 | |
f2076e7d SL |
3009 | if (test_bit(Journal, &rdev->flags)) |
3010 | return -EBUSY; | |
b522adcd | 3011 | if (strict_blocks_to_sectors(buf, §ors) < 0) |
d7027458 | 3012 | return -EINVAL; |
c6563a8c N |
3013 | if (rdev->data_offset != rdev->new_data_offset) |
3014 | return -EINVAL; /* too confusing */ | |
0cd17fec | 3015 | if (my_mddev->pers && rdev->raid_disk >= 0) { |
d7027458 | 3016 | if (my_mddev->persistent) { |
dd8ac336 AN |
3017 | sectors = super_types[my_mddev->major_version]. |
3018 | rdev_size_change(rdev, sectors); | |
3019 | if (!sectors) | |
0cd17fec | 3020 | return -EBUSY; |
dd8ac336 | 3021 | } else if (!sectors) |
77304d2a | 3022 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9) - |
dd8ac336 | 3023 | rdev->data_offset; |
a6468539 N |
3024 | if (!my_mddev->pers->resize) |
3025 | /* Cannot change size for RAID0 or Linear etc */ | |
3026 | return -EINVAL; | |
0cd17fec | 3027 | } |
dd8ac336 | 3028 | if (sectors < my_mddev->dev_sectors) |
7d3c6f87 | 3029 | return -EINVAL; /* component must fit device */ |
0cd17fec | 3030 | |
dd8ac336 AN |
3031 | rdev->sectors = sectors; |
3032 | if (sectors > oldsectors && my_mddev->external) { | |
8b1afc3d N |
3033 | /* Need to check that all other rdevs with the same |
3034 | * ->bdev do not overlap. 'rcu' is sufficient to walk | |
3035 | * the rdev lists safely. | |
3036 | * This check does not provide a hard guarantee, it | |
3037 | * just helps avoid dangerous mistakes. | |
c5d79adb | 3038 | */ |
fd01b88c | 3039 | struct mddev *mddev; |
c5d79adb | 3040 | int overlap = 0; |
159ec1fc | 3041 | struct list_head *tmp; |
c5d79adb | 3042 | |
8b1afc3d | 3043 | rcu_read_lock(); |
29ac4aa3 | 3044 | for_each_mddev(mddev, tmp) { |
3cb03002 | 3045 | struct md_rdev *rdev2; |
c5d79adb | 3046 | |
dafb20fa | 3047 | rdev_for_each(rdev2, mddev) |
f21e9ff7 N |
3048 | if (rdev->bdev == rdev2->bdev && |
3049 | rdev != rdev2 && | |
3050 | overlaps(rdev->data_offset, rdev->sectors, | |
3051 | rdev2->data_offset, | |
3052 | rdev2->sectors)) { | |
c5d79adb N |
3053 | overlap = 1; |
3054 | break; | |
3055 | } | |
c5d79adb N |
3056 | if (overlap) { |
3057 | mddev_put(mddev); | |
3058 | break; | |
3059 | } | |
3060 | } | |
8b1afc3d | 3061 | rcu_read_unlock(); |
c5d79adb N |
3062 | if (overlap) { |
3063 | /* Someone else could have slipped in a size | |
3064 | * change here, but doing so is just silly. | |
dd8ac336 | 3065 | * We put oldsectors back because we *know* it is |
c5d79adb N |
3066 | * safe, and trust userspace not to race with |
3067 | * itself | |
3068 | */ | |
dd8ac336 | 3069 | rdev->sectors = oldsectors; |
c5d79adb N |
3070 | return -EBUSY; |
3071 | } | |
3072 | } | |
83303b61 N |
3073 | return len; |
3074 | } | |
3075 | ||
3076 | static struct rdev_sysfs_entry rdev_size = | |
80ca3a44 | 3077 | __ATTR(size, S_IRUGO|S_IWUSR, rdev_size_show, rdev_size_store); |
83303b61 | 3078 | |
3cb03002 | 3079 | static ssize_t recovery_start_show(struct md_rdev *rdev, char *page) |
06e3c817 DW |
3080 | { |
3081 | unsigned long long recovery_start = rdev->recovery_offset; | |
3082 | ||
3083 | if (test_bit(In_sync, &rdev->flags) || | |
3084 | recovery_start == MaxSector) | |
3085 | return sprintf(page, "none\n"); | |
3086 | ||
3087 | return sprintf(page, "%llu\n", recovery_start); | |
3088 | } | |
3089 | ||
3cb03002 | 3090 | static ssize_t recovery_start_store(struct md_rdev *rdev, const char *buf, size_t len) |
06e3c817 DW |
3091 | { |
3092 | unsigned long long recovery_start; | |
3093 | ||
3094 | if (cmd_match(buf, "none")) | |
3095 | recovery_start = MaxSector; | |
b29bebd6 | 3096 | else if (kstrtoull(buf, 10, &recovery_start)) |
06e3c817 DW |
3097 | return -EINVAL; |
3098 | ||
3099 | if (rdev->mddev->pers && | |
3100 | rdev->raid_disk >= 0) | |
3101 | return -EBUSY; | |
3102 | ||
3103 | rdev->recovery_offset = recovery_start; | |
3104 | if (recovery_start == MaxSector) | |
3105 | set_bit(In_sync, &rdev->flags); | |
3106 | else | |
3107 | clear_bit(In_sync, &rdev->flags); | |
3108 | return len; | |
3109 | } | |
3110 | ||
3111 | static struct rdev_sysfs_entry rdev_recovery_start = | |
3112 | __ATTR(recovery_start, S_IRUGO|S_IWUSR, recovery_start_show, recovery_start_store); | |
3113 | ||
fc974ee2 VV |
3114 | /* sysfs access to bad-blocks list. |
3115 | * We present two files. | |
3116 | * 'bad-blocks' lists sector numbers and lengths of ranges that | |
3117 | * are recorded as bad. The list is truncated to fit within | |
3118 | * the one-page limit of sysfs. | |
3119 | * Writing "sector length" to this file adds an acknowledged | |
3120 | * bad block list. | |
3121 | * 'unacknowledged-bad-blocks' lists bad blocks that have not yet | |
3122 | * been acknowledged. Writing to this file adds bad blocks | |
3123 | * without acknowledging them. This is largely for testing. | |
3124 | */ | |
3cb03002 | 3125 | static ssize_t bb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3126 | { |
3127 | return badblocks_show(&rdev->badblocks, page, 0); | |
3128 | } | |
3cb03002 | 3129 | static ssize_t bb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 | 3130 | { |
de393cde N |
3131 | int rv = badblocks_store(&rdev->badblocks, page, len, 0); |
3132 | /* Maybe that ack was all we needed */ | |
3133 | if (test_and_clear_bit(BlockedBadBlocks, &rdev->flags)) | |
3134 | wake_up(&rdev->blocked_wait); | |
3135 | return rv; | |
16c791a5 N |
3136 | } |
3137 | static struct rdev_sysfs_entry rdev_bad_blocks = | |
3138 | __ATTR(bad_blocks, S_IRUGO|S_IWUSR, bb_show, bb_store); | |
3139 | ||
3cb03002 | 3140 | static ssize_t ubb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3141 | { |
3142 | return badblocks_show(&rdev->badblocks, page, 1); | |
3143 | } | |
3cb03002 | 3144 | static ssize_t ubb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 N |
3145 | { |
3146 | return badblocks_store(&rdev->badblocks, page, len, 1); | |
3147 | } | |
3148 | static struct rdev_sysfs_entry rdev_unack_bad_blocks = | |
3149 | __ATTR(unacknowledged_bad_blocks, S_IRUGO|S_IWUSR, ubb_show, ubb_store); | |
3150 | ||
86e6ffdd N |
3151 | static struct attribute *rdev_default_attrs[] = { |
3152 | &rdev_state.attr, | |
4dbcdc75 | 3153 | &rdev_errors.attr, |
014236d2 | 3154 | &rdev_slot.attr, |
93c8cad0 | 3155 | &rdev_offset.attr, |
c6563a8c | 3156 | &rdev_new_offset.attr, |
83303b61 | 3157 | &rdev_size.attr, |
06e3c817 | 3158 | &rdev_recovery_start.attr, |
16c791a5 N |
3159 | &rdev_bad_blocks.attr, |
3160 | &rdev_unack_bad_blocks.attr, | |
86e6ffdd N |
3161 | NULL, |
3162 | }; | |
3163 | static ssize_t | |
3164 | rdev_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
3165 | { | |
3166 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3167 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
86e6ffdd N |
3168 | |
3169 | if (!entry->show) | |
3170 | return -EIO; | |
758bfc8a N |
3171 | if (!rdev->mddev) |
3172 | return -EBUSY; | |
3173 | return entry->show(rdev, page); | |
86e6ffdd N |
3174 | } |
3175 | ||
3176 | static ssize_t | |
3177 | rdev_attr_store(struct kobject *kobj, struct attribute *attr, | |
3178 | const char *page, size_t length) | |
3179 | { | |
3180 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3181 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
27c529bb | 3182 | ssize_t rv; |
fd01b88c | 3183 | struct mddev *mddev = rdev->mddev; |
86e6ffdd N |
3184 | |
3185 | if (!entry->store) | |
3186 | return -EIO; | |
67463acb N |
3187 | if (!capable(CAP_SYS_ADMIN)) |
3188 | return -EACCES; | |
27c529bb | 3189 | rv = mddev ? mddev_lock(mddev): -EBUSY; |
ca388059 | 3190 | if (!rv) { |
27c529bb N |
3191 | if (rdev->mddev == NULL) |
3192 | rv = -EBUSY; | |
3193 | else | |
3194 | rv = entry->store(rdev, page, length); | |
6a51830e | 3195 | mddev_unlock(mddev); |
ca388059 N |
3196 | } |
3197 | return rv; | |
86e6ffdd N |
3198 | } |
3199 | ||
3200 | static void rdev_free(struct kobject *ko) | |
3201 | { | |
3cb03002 | 3202 | struct md_rdev *rdev = container_of(ko, struct md_rdev, kobj); |
86e6ffdd N |
3203 | kfree(rdev); |
3204 | } | |
52cf25d0 | 3205 | static const struct sysfs_ops rdev_sysfs_ops = { |
86e6ffdd N |
3206 | .show = rdev_attr_show, |
3207 | .store = rdev_attr_store, | |
3208 | }; | |
3209 | static struct kobj_type rdev_ktype = { | |
3210 | .release = rdev_free, | |
3211 | .sysfs_ops = &rdev_sysfs_ops, | |
3212 | .default_attrs = rdev_default_attrs, | |
3213 | }; | |
3214 | ||
3cb03002 | 3215 | int md_rdev_init(struct md_rdev *rdev) |
e8bb9a83 N |
3216 | { |
3217 | rdev->desc_nr = -1; | |
3218 | rdev->saved_raid_disk = -1; | |
3219 | rdev->raid_disk = -1; | |
3220 | rdev->flags = 0; | |
3221 | rdev->data_offset = 0; | |
c6563a8c | 3222 | rdev->new_data_offset = 0; |
e8bb9a83 | 3223 | rdev->sb_events = 0; |
0e3ef49e | 3224 | rdev->last_read_error = 0; |
2699b672 N |
3225 | rdev->sb_loaded = 0; |
3226 | rdev->bb_page = NULL; | |
e8bb9a83 N |
3227 | atomic_set(&rdev->nr_pending, 0); |
3228 | atomic_set(&rdev->read_errors, 0); | |
3229 | atomic_set(&rdev->corrected_errors, 0); | |
3230 | ||
3231 | INIT_LIST_HEAD(&rdev->same_set); | |
3232 | init_waitqueue_head(&rdev->blocked_wait); | |
2230dfe4 N |
3233 | |
3234 | /* Add space to store bad block list. | |
3235 | * This reserves the space even on arrays where it cannot | |
3236 | * be used - I wonder if that matters | |
3237 | */ | |
fc974ee2 | 3238 | return badblocks_init(&rdev->badblocks, 0); |
e8bb9a83 N |
3239 | } |
3240 | EXPORT_SYMBOL_GPL(md_rdev_init); | |
1da177e4 LT |
3241 | /* |
3242 | * Import a device. If 'super_format' >= 0, then sanity check the superblock | |
3243 | * | |
3244 | * mark the device faulty if: | |
3245 | * | |
3246 | * - the device is nonexistent (zero size) | |
3247 | * - the device has no valid superblock | |
3248 | * | |
3249 | * a faulty rdev _never_ has rdev->sb set. | |
3250 | */ | |
3cb03002 | 3251 | static struct md_rdev *md_import_device(dev_t newdev, int super_format, int super_minor) |
1da177e4 LT |
3252 | { |
3253 | char b[BDEVNAME_SIZE]; | |
3254 | int err; | |
3cb03002 | 3255 | struct md_rdev *rdev; |
1da177e4 LT |
3256 | sector_t size; |
3257 | ||
9ffae0cf | 3258 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
9d48739e | 3259 | if (!rdev) |
1da177e4 | 3260 | return ERR_PTR(-ENOMEM); |
1da177e4 | 3261 | |
2230dfe4 N |
3262 | err = md_rdev_init(rdev); |
3263 | if (err) | |
3264 | goto abort_free; | |
3265 | err = alloc_disk_sb(rdev); | |
3266 | if (err) | |
1da177e4 LT |
3267 | goto abort_free; |
3268 | ||
c5d79adb | 3269 | err = lock_rdev(rdev, newdev, super_format == -2); |
1da177e4 LT |
3270 | if (err) |
3271 | goto abort_free; | |
3272 | ||
f9cb074b | 3273 | kobject_init(&rdev->kobj, &rdev_ktype); |
86e6ffdd | 3274 | |
77304d2a | 3275 | size = i_size_read(rdev->bdev->bd_inode) >> BLOCK_SIZE_BITS; |
1da177e4 | 3276 | if (!size) { |
9d48739e | 3277 | pr_warn("md: %s has zero or unknown size, marking faulty!\n", |
1da177e4 LT |
3278 | bdevname(rdev->bdev,b)); |
3279 | err = -EINVAL; | |
3280 | goto abort_free; | |
3281 | } | |
3282 | ||
3283 | if (super_format >= 0) { | |
3284 | err = super_types[super_format]. | |
3285 | load_super(rdev, NULL, super_minor); | |
3286 | if (err == -EINVAL) { | |
9d48739e | 3287 | pr_warn("md: %s does not have a valid v%d.%d superblock, not importing!\n", |
df968c4e | 3288 | bdevname(rdev->bdev,b), |
9d48739e | 3289 | super_format, super_minor); |
1da177e4 LT |
3290 | goto abort_free; |
3291 | } | |
3292 | if (err < 0) { | |
9d48739e | 3293 | pr_warn("md: could not read %s's sb, not importing!\n", |
1da177e4 LT |
3294 | bdevname(rdev->bdev,b)); |
3295 | goto abort_free; | |
3296 | } | |
3297 | } | |
6bfe0b49 | 3298 | |
1da177e4 LT |
3299 | return rdev; |
3300 | ||
3301 | abort_free: | |
2699b672 N |
3302 | if (rdev->bdev) |
3303 | unlock_rdev(rdev); | |
545c8795 | 3304 | md_rdev_clear(rdev); |
1da177e4 LT |
3305 | kfree(rdev); |
3306 | return ERR_PTR(err); | |
3307 | } | |
3308 | ||
3309 | /* | |
3310 | * Check a full RAID array for plausibility | |
3311 | */ | |
3312 | ||
f72ffdd6 | 3313 | static void analyze_sbs(struct mddev *mddev) |
1da177e4 LT |
3314 | { |
3315 | int i; | |
3cb03002 | 3316 | struct md_rdev *rdev, *freshest, *tmp; |
1da177e4 LT |
3317 | char b[BDEVNAME_SIZE]; |
3318 | ||
3319 | freshest = NULL; | |
dafb20fa | 3320 | rdev_for_each_safe(rdev, tmp, mddev) |
1da177e4 LT |
3321 | switch (super_types[mddev->major_version]. |
3322 | load_super(rdev, freshest, mddev->minor_version)) { | |
3323 | case 1: | |
3324 | freshest = rdev; | |
3325 | break; | |
3326 | case 0: | |
3327 | break; | |
3328 | default: | |
9d48739e | 3329 | pr_warn("md: fatal superblock inconsistency in %s -- removing from array\n", |
1da177e4 | 3330 | bdevname(rdev->bdev,b)); |
fb56dfef | 3331 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3332 | } |
3333 | ||
1da177e4 LT |
3334 | super_types[mddev->major_version]. |
3335 | validate_super(mddev, freshest); | |
3336 | ||
3337 | i = 0; | |
dafb20fa | 3338 | rdev_for_each_safe(rdev, tmp, mddev) { |
233fca36 N |
3339 | if (mddev->max_disks && |
3340 | (rdev->desc_nr >= mddev->max_disks || | |
3341 | i > mddev->max_disks)) { | |
9d48739e N |
3342 | pr_warn("md: %s: %s: only %d devices permitted\n", |
3343 | mdname(mddev), bdevname(rdev->bdev, b), | |
3344 | mddev->max_disks); | |
fb56dfef | 3345 | md_kick_rdev_from_array(rdev); |
de01dfad N |
3346 | continue; |
3347 | } | |
1aee41f6 | 3348 | if (rdev != freshest) { |
1da177e4 LT |
3349 | if (super_types[mddev->major_version]. |
3350 | validate_super(mddev, rdev)) { | |
9d48739e | 3351 | pr_warn("md: kicking non-fresh %s from array!\n", |
1da177e4 | 3352 | bdevname(rdev->bdev,b)); |
fb56dfef | 3353 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3354 | continue; |
3355 | } | |
1aee41f6 | 3356 | } |
1da177e4 LT |
3357 | if (mddev->level == LEVEL_MULTIPATH) { |
3358 | rdev->desc_nr = i++; | |
3359 | rdev->raid_disk = rdev->desc_nr; | |
b2d444d7 | 3360 | set_bit(In_sync, &rdev->flags); |
f2076e7d SL |
3361 | } else if (rdev->raid_disk >= |
3362 | (mddev->raid_disks - min(0, mddev->delta_disks)) && | |
3363 | !test_bit(Journal, &rdev->flags)) { | |
a778b73f N |
3364 | rdev->raid_disk = -1; |
3365 | clear_bit(In_sync, &rdev->flags); | |
1da177e4 LT |
3366 | } |
3367 | } | |
1da177e4 LT |
3368 | } |
3369 | ||
72e02075 N |
3370 | /* Read a fixed-point number. |
3371 | * Numbers in sysfs attributes should be in "standard" units where | |
3372 | * possible, so time should be in seconds. | |
f72ffdd6 | 3373 | * However we internally use a a much smaller unit such as |
72e02075 N |
3374 | * milliseconds or jiffies. |
3375 | * This function takes a decimal number with a possible fractional | |
3376 | * component, and produces an integer which is the result of | |
3377 | * multiplying that number by 10^'scale'. | |
3378 | * all without any floating-point arithmetic. | |
3379 | */ | |
3380 | int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale) | |
3381 | { | |
3382 | unsigned long result = 0; | |
3383 | long decimals = -1; | |
3384 | while (isdigit(*cp) || (*cp == '.' && decimals < 0)) { | |
3385 | if (*cp == '.') | |
3386 | decimals = 0; | |
3387 | else if (decimals < scale) { | |
3388 | unsigned int value; | |
3389 | value = *cp - '0'; | |
3390 | result = result * 10 + value; | |
3391 | if (decimals >= 0) | |
3392 | decimals++; | |
3393 | } | |
3394 | cp++; | |
3395 | } | |
3396 | if (*cp == '\n') | |
3397 | cp++; | |
3398 | if (*cp) | |
3399 | return -EINVAL; | |
3400 | if (decimals < 0) | |
3401 | decimals = 0; | |
3402 | while (decimals < scale) { | |
3403 | result *= 10; | |
3404 | decimals ++; | |
3405 | } | |
3406 | *res = result; | |
3407 | return 0; | |
3408 | } | |
3409 | ||
16f17b39 | 3410 | static ssize_t |
fd01b88c | 3411 | safe_delay_show(struct mddev *mddev, char *page) |
16f17b39 N |
3412 | { |
3413 | int msec = (mddev->safemode_delay*1000)/HZ; | |
3414 | return sprintf(page, "%d.%03d\n", msec/1000, msec%1000); | |
3415 | } | |
3416 | static ssize_t | |
fd01b88c | 3417 | safe_delay_store(struct mddev *mddev, const char *cbuf, size_t len) |
16f17b39 | 3418 | { |
16f17b39 | 3419 | unsigned long msec; |
97ce0a7f | 3420 | |
28c1b9fd | 3421 | if (mddev_is_clustered(mddev)) { |
9d48739e | 3422 | pr_warn("md: Safemode is disabled for clustered mode\n"); |
28c1b9fd GR |
3423 | return -EINVAL; |
3424 | } | |
3425 | ||
72e02075 | 3426 | if (strict_strtoul_scaled(cbuf, &msec, 3) < 0) |
16f17b39 | 3427 | return -EINVAL; |
16f17b39 N |
3428 | if (msec == 0) |
3429 | mddev->safemode_delay = 0; | |
3430 | else { | |
19052c0e | 3431 | unsigned long old_delay = mddev->safemode_delay; |
1b30e66f N |
3432 | unsigned long new_delay = (msec*HZ)/1000; |
3433 | ||
3434 | if (new_delay == 0) | |
3435 | new_delay = 1; | |
3436 | mddev->safemode_delay = new_delay; | |
3437 | if (new_delay < old_delay || old_delay == 0) | |
3438 | mod_timer(&mddev->safemode_timer, jiffies+1); | |
16f17b39 N |
3439 | } |
3440 | return len; | |
3441 | } | |
3442 | static struct md_sysfs_entry md_safe_delay = | |
80ca3a44 | 3443 | __ATTR(safe_mode_delay, S_IRUGO|S_IWUSR,safe_delay_show, safe_delay_store); |
16f17b39 | 3444 | |
eae1701f | 3445 | static ssize_t |
fd01b88c | 3446 | level_show(struct mddev *mddev, char *page) |
eae1701f | 3447 | { |
36d091f4 N |
3448 | struct md_personality *p; |
3449 | int ret; | |
3450 | spin_lock(&mddev->lock); | |
3451 | p = mddev->pers; | |
d9d166c2 | 3452 | if (p) |
36d091f4 | 3453 | ret = sprintf(page, "%s\n", p->name); |
d9d166c2 | 3454 | else if (mddev->clevel[0]) |
36d091f4 | 3455 | ret = sprintf(page, "%s\n", mddev->clevel); |
d9d166c2 | 3456 | else if (mddev->level != LEVEL_NONE) |
36d091f4 | 3457 | ret = sprintf(page, "%d\n", mddev->level); |
d9d166c2 | 3458 | else |
36d091f4 N |
3459 | ret = 0; |
3460 | spin_unlock(&mddev->lock); | |
3461 | return ret; | |
eae1701f N |
3462 | } |
3463 | ||
d9d166c2 | 3464 | static ssize_t |
fd01b88c | 3465 | level_store(struct mddev *mddev, const char *buf, size_t len) |
d9d166c2 | 3466 | { |
f2859af6 | 3467 | char clevel[16]; |
6791875e N |
3468 | ssize_t rv; |
3469 | size_t slen = len; | |
db721d32 | 3470 | struct md_personality *pers, *oldpers; |
f2859af6 | 3471 | long level; |
db721d32 | 3472 | void *priv, *oldpriv; |
3cb03002 | 3473 | struct md_rdev *rdev; |
245f46c2 | 3474 | |
6791875e N |
3475 | if (slen == 0 || slen >= sizeof(clevel)) |
3476 | return -EINVAL; | |
3477 | ||
3478 | rv = mddev_lock(mddev); | |
3479 | if (rv) | |
3480 | return rv; | |
3481 | ||
245f46c2 | 3482 | if (mddev->pers == NULL) { |
6791875e N |
3483 | strncpy(mddev->clevel, buf, slen); |
3484 | if (mddev->clevel[slen-1] == '\n') | |
3485 | slen--; | |
3486 | mddev->clevel[slen] = 0; | |
245f46c2 | 3487 | mddev->level = LEVEL_NONE; |
6791875e N |
3488 | rv = len; |
3489 | goto out_unlock; | |
245f46c2 | 3490 | } |
6791875e | 3491 | rv = -EROFS; |
bd8839e0 | 3492 | if (mddev->ro) |
6791875e | 3493 | goto out_unlock; |
245f46c2 N |
3494 | |
3495 | /* request to change the personality. Need to ensure: | |
3496 | * - array is not engaged in resync/recovery/reshape | |
3497 | * - old personality can be suspended | |
3498 | * - new personality will access other array. | |
3499 | */ | |
3500 | ||
6791875e | 3501 | rv = -EBUSY; |
bb4f1e9d | 3502 | if (mddev->sync_thread || |
f851b60d | 3503 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
bb4f1e9d N |
3504 | mddev->reshape_position != MaxSector || |
3505 | mddev->sysfs_active) | |
6791875e | 3506 | goto out_unlock; |
245f46c2 | 3507 | |
6791875e | 3508 | rv = -EINVAL; |
245f46c2 | 3509 | if (!mddev->pers->quiesce) { |
9d48739e N |
3510 | pr_warn("md: %s: %s does not support online personality change\n", |
3511 | mdname(mddev), mddev->pers->name); | |
6791875e | 3512 | goto out_unlock; |
245f46c2 N |
3513 | } |
3514 | ||
3515 | /* Now find the new personality */ | |
6791875e N |
3516 | strncpy(clevel, buf, slen); |
3517 | if (clevel[slen-1] == '\n') | |
3518 | slen--; | |
3519 | clevel[slen] = 0; | |
b29bebd6 | 3520 | if (kstrtol(clevel, 10, &level)) |
f2859af6 | 3521 | level = LEVEL_NONE; |
245f46c2 | 3522 | |
f2859af6 DW |
3523 | if (request_module("md-%s", clevel) != 0) |
3524 | request_module("md-level-%s", clevel); | |
245f46c2 | 3525 | spin_lock(&pers_lock); |
f2859af6 | 3526 | pers = find_pers(level, clevel); |
245f46c2 N |
3527 | if (!pers || !try_module_get(pers->owner)) { |
3528 | spin_unlock(&pers_lock); | |
9d48739e | 3529 | pr_warn("md: personality %s not loaded\n", clevel); |
6791875e N |
3530 | rv = -EINVAL; |
3531 | goto out_unlock; | |
245f46c2 N |
3532 | } |
3533 | spin_unlock(&pers_lock); | |
3534 | ||
3535 | if (pers == mddev->pers) { | |
3536 | /* Nothing to do! */ | |
3537 | module_put(pers->owner); | |
6791875e N |
3538 | rv = len; |
3539 | goto out_unlock; | |
245f46c2 N |
3540 | } |
3541 | if (!pers->takeover) { | |
3542 | module_put(pers->owner); | |
9d48739e N |
3543 | pr_warn("md: %s: %s does not support personality takeover\n", |
3544 | mdname(mddev), clevel); | |
6791875e N |
3545 | rv = -EINVAL; |
3546 | goto out_unlock; | |
245f46c2 N |
3547 | } |
3548 | ||
dafb20fa | 3549 | rdev_for_each(rdev, mddev) |
e93f68a1 N |
3550 | rdev->new_raid_disk = rdev->raid_disk; |
3551 | ||
245f46c2 N |
3552 | /* ->takeover must set new_* and/or delta_disks |
3553 | * if it succeeds, and may set them when it fails. | |
3554 | */ | |
3555 | priv = pers->takeover(mddev); | |
3556 | if (IS_ERR(priv)) { | |
3557 | mddev->new_level = mddev->level; | |
3558 | mddev->new_layout = mddev->layout; | |
664e7c41 | 3559 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
245f46c2 N |
3560 | mddev->raid_disks -= mddev->delta_disks; |
3561 | mddev->delta_disks = 0; | |
2c810cdd | 3562 | mddev->reshape_backwards = 0; |
245f46c2 | 3563 | module_put(pers->owner); |
9d48739e N |
3564 | pr_warn("md: %s: %s would not accept array\n", |
3565 | mdname(mddev), clevel); | |
6791875e N |
3566 | rv = PTR_ERR(priv); |
3567 | goto out_unlock; | |
245f46c2 N |
3568 | } |
3569 | ||
3570 | /* Looks like we have a winner */ | |
3571 | mddev_suspend(mddev); | |
5aa61f42 | 3572 | mddev_detach(mddev); |
36d091f4 N |
3573 | |
3574 | spin_lock(&mddev->lock); | |
db721d32 N |
3575 | oldpers = mddev->pers; |
3576 | oldpriv = mddev->private; | |
3577 | mddev->pers = pers; | |
3578 | mddev->private = priv; | |
3579 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); | |
3580 | mddev->level = mddev->new_level; | |
3581 | mddev->layout = mddev->new_layout; | |
3582 | mddev->chunk_sectors = mddev->new_chunk_sectors; | |
3583 | mddev->delta_disks = 0; | |
3584 | mddev->reshape_backwards = 0; | |
3585 | mddev->degraded = 0; | |
36d091f4 | 3586 | spin_unlock(&mddev->lock); |
db721d32 N |
3587 | |
3588 | if (oldpers->sync_request == NULL && | |
3589 | mddev->external) { | |
3590 | /* We are converting from a no-redundancy array | |
3591 | * to a redundancy array and metadata is managed | |
3592 | * externally so we need to be sure that writes | |
3593 | * won't block due to a need to transition | |
3594 | * clean->dirty | |
3595 | * until external management is started. | |
3596 | */ | |
3597 | mddev->in_sync = 0; | |
3598 | mddev->safemode_delay = 0; | |
3599 | mddev->safemode = 0; | |
3600 | } | |
f72ffdd6 | 3601 | |
db721d32 N |
3602 | oldpers->free(mddev, oldpriv); |
3603 | ||
3604 | if (oldpers->sync_request == NULL && | |
a64c876f N |
3605 | pers->sync_request != NULL) { |
3606 | /* need to add the md_redundancy_group */ | |
3607 | if (sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
3608 | pr_warn("md: cannot register extra attributes for %s\n", |
3609 | mdname(mddev)); | |
388975cc | 3610 | mddev->sysfs_action = sysfs_get_dirent(mddev->kobj.sd, "sync_action"); |
f72ffdd6 | 3611 | } |
db721d32 | 3612 | if (oldpers->sync_request != NULL && |
a64c876f N |
3613 | pers->sync_request == NULL) { |
3614 | /* need to remove the md_redundancy_group */ | |
3615 | if (mddev->to_remove == NULL) | |
3616 | mddev->to_remove = &md_redundancy_group; | |
3617 | } | |
3618 | ||
4cb9da7d AO |
3619 | module_put(oldpers->owner); |
3620 | ||
dafb20fa | 3621 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
3622 | if (rdev->raid_disk < 0) |
3623 | continue; | |
bf2cb0da | 3624 | if (rdev->new_raid_disk >= mddev->raid_disks) |
e93f68a1 N |
3625 | rdev->new_raid_disk = -1; |
3626 | if (rdev->new_raid_disk == rdev->raid_disk) | |
3627 | continue; | |
36fad858 | 3628 | sysfs_unlink_rdev(mddev, rdev); |
e93f68a1 | 3629 | } |
dafb20fa | 3630 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
3631 | if (rdev->raid_disk < 0) |
3632 | continue; | |
3633 | if (rdev->new_raid_disk == rdev->raid_disk) | |
3634 | continue; | |
3635 | rdev->raid_disk = rdev->new_raid_disk; | |
3636 | if (rdev->raid_disk < 0) | |
3a981b03 | 3637 | clear_bit(In_sync, &rdev->flags); |
e93f68a1 | 3638 | else { |
36fad858 | 3639 | if (sysfs_link_rdev(mddev, rdev)) |
9d48739e N |
3640 | pr_warn("md: cannot register rd%d for %s after level change\n", |
3641 | rdev->raid_disk, mdname(mddev)); | |
3a981b03 | 3642 | } |
e93f68a1 N |
3643 | } |
3644 | ||
db721d32 | 3645 | if (pers->sync_request == NULL) { |
9af204cf TM |
3646 | /* this is now an array without redundancy, so |
3647 | * it must always be in_sync | |
3648 | */ | |
3649 | mddev->in_sync = 1; | |
3650 | del_timer_sync(&mddev->safemode_timer); | |
3651 | } | |
02e5f5c0 | 3652 | blk_set_stacking_limits(&mddev->queue->limits); |
245f46c2 | 3653 | pers->run(mddev); |
2953079c | 3654 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
47525e59 | 3655 | mddev_resume(mddev); |
830778a1 N |
3656 | if (!mddev->thread) |
3657 | md_update_sb(mddev, 1); | |
5cac7861 | 3658 | sysfs_notify(&mddev->kobj, NULL, "level"); |
bb7f8d22 | 3659 | md_new_event(mddev); |
6791875e N |
3660 | rv = len; |
3661 | out_unlock: | |
3662 | mddev_unlock(mddev); | |
d9d166c2 N |
3663 | return rv; |
3664 | } | |
3665 | ||
3666 | static struct md_sysfs_entry md_level = | |
80ca3a44 | 3667 | __ATTR(level, S_IRUGO|S_IWUSR, level_show, level_store); |
eae1701f | 3668 | |
d4dbd025 | 3669 | static ssize_t |
fd01b88c | 3670 | layout_show(struct mddev *mddev, char *page) |
d4dbd025 N |
3671 | { |
3672 | /* just a number, not meaningful for all levels */ | |
08a02ecd N |
3673 | if (mddev->reshape_position != MaxSector && |
3674 | mddev->layout != mddev->new_layout) | |
3675 | return sprintf(page, "%d (%d)\n", | |
3676 | mddev->new_layout, mddev->layout); | |
d4dbd025 N |
3677 | return sprintf(page, "%d\n", mddev->layout); |
3678 | } | |
3679 | ||
3680 | static ssize_t | |
fd01b88c | 3681 | layout_store(struct mddev *mddev, const char *buf, size_t len) |
d4dbd025 | 3682 | { |
4c9309c0 | 3683 | unsigned int n; |
6791875e | 3684 | int err; |
d4dbd025 | 3685 | |
4c9309c0 AD |
3686 | err = kstrtouint(buf, 10, &n); |
3687 | if (err < 0) | |
3688 | return err; | |
6791875e N |
3689 | err = mddev_lock(mddev); |
3690 | if (err) | |
3691 | return err; | |
d4dbd025 | 3692 | |
b3546035 | 3693 | if (mddev->pers) { |
50ac168a | 3694 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
3695 | err = -EBUSY; |
3696 | else if (mddev->ro) | |
3697 | err = -EROFS; | |
3698 | else { | |
3699 | mddev->new_layout = n; | |
3700 | err = mddev->pers->check_reshape(mddev); | |
3701 | if (err) | |
3702 | mddev->new_layout = mddev->layout; | |
597a711b | 3703 | } |
b3546035 | 3704 | } else { |
08a02ecd | 3705 | mddev->new_layout = n; |
b3546035 N |
3706 | if (mddev->reshape_position == MaxSector) |
3707 | mddev->layout = n; | |
3708 | } | |
6791875e N |
3709 | mddev_unlock(mddev); |
3710 | return err ?: len; | |
d4dbd025 N |
3711 | } |
3712 | static struct md_sysfs_entry md_layout = | |
80ca3a44 | 3713 | __ATTR(layout, S_IRUGO|S_IWUSR, layout_show, layout_store); |
d4dbd025 | 3714 | |
eae1701f | 3715 | static ssize_t |
fd01b88c | 3716 | raid_disks_show(struct mddev *mddev, char *page) |
eae1701f | 3717 | { |
bb636547 N |
3718 | if (mddev->raid_disks == 0) |
3719 | return 0; | |
08a02ecd N |
3720 | if (mddev->reshape_position != MaxSector && |
3721 | mddev->delta_disks != 0) | |
3722 | return sprintf(page, "%d (%d)\n", mddev->raid_disks, | |
3723 | mddev->raid_disks - mddev->delta_disks); | |
eae1701f N |
3724 | return sprintf(page, "%d\n", mddev->raid_disks); |
3725 | } | |
3726 | ||
fd01b88c | 3727 | static int update_raid_disks(struct mddev *mddev, int raid_disks); |
da943b99 N |
3728 | |
3729 | static ssize_t | |
fd01b88c | 3730 | raid_disks_store(struct mddev *mddev, const char *buf, size_t len) |
da943b99 | 3731 | { |
4c9309c0 | 3732 | unsigned int n; |
6791875e | 3733 | int err; |
da943b99 | 3734 | |
4c9309c0 AD |
3735 | err = kstrtouint(buf, 10, &n); |
3736 | if (err < 0) | |
3737 | return err; | |
da943b99 | 3738 | |
6791875e N |
3739 | err = mddev_lock(mddev); |
3740 | if (err) | |
3741 | return err; | |
da943b99 | 3742 | if (mddev->pers) |
6791875e | 3743 | err = update_raid_disks(mddev, n); |
08a02ecd | 3744 | else if (mddev->reshape_position != MaxSector) { |
c6563a8c | 3745 | struct md_rdev *rdev; |
08a02ecd | 3746 | int olddisks = mddev->raid_disks - mddev->delta_disks; |
c6563a8c | 3747 | |
6791875e | 3748 | err = -EINVAL; |
c6563a8c N |
3749 | rdev_for_each(rdev, mddev) { |
3750 | if (olddisks < n && | |
3751 | rdev->data_offset < rdev->new_data_offset) | |
6791875e | 3752 | goto out_unlock; |
c6563a8c N |
3753 | if (olddisks > n && |
3754 | rdev->data_offset > rdev->new_data_offset) | |
6791875e | 3755 | goto out_unlock; |
c6563a8c | 3756 | } |
6791875e | 3757 | err = 0; |
08a02ecd N |
3758 | mddev->delta_disks = n - olddisks; |
3759 | mddev->raid_disks = n; | |
2c810cdd | 3760 | mddev->reshape_backwards = (mddev->delta_disks < 0); |
08a02ecd | 3761 | } else |
da943b99 | 3762 | mddev->raid_disks = n; |
6791875e N |
3763 | out_unlock: |
3764 | mddev_unlock(mddev); | |
3765 | return err ? err : len; | |
da943b99 N |
3766 | } |
3767 | static struct md_sysfs_entry md_raid_disks = | |
80ca3a44 | 3768 | __ATTR(raid_disks, S_IRUGO|S_IWUSR, raid_disks_show, raid_disks_store); |
eae1701f | 3769 | |
3b34380a | 3770 | static ssize_t |
fd01b88c | 3771 | chunk_size_show(struct mddev *mddev, char *page) |
3b34380a | 3772 | { |
08a02ecd | 3773 | if (mddev->reshape_position != MaxSector && |
664e7c41 AN |
3774 | mddev->chunk_sectors != mddev->new_chunk_sectors) |
3775 | return sprintf(page, "%d (%d)\n", | |
3776 | mddev->new_chunk_sectors << 9, | |
9d8f0363 AN |
3777 | mddev->chunk_sectors << 9); |
3778 | return sprintf(page, "%d\n", mddev->chunk_sectors << 9); | |
3b34380a N |
3779 | } |
3780 | ||
3781 | static ssize_t | |
fd01b88c | 3782 | chunk_size_store(struct mddev *mddev, const char *buf, size_t len) |
3b34380a | 3783 | { |
4c9309c0 | 3784 | unsigned long n; |
6791875e | 3785 | int err; |
3b34380a | 3786 | |
4c9309c0 AD |
3787 | err = kstrtoul(buf, 10, &n); |
3788 | if (err < 0) | |
3789 | return err; | |
3b34380a | 3790 | |
6791875e N |
3791 | err = mddev_lock(mddev); |
3792 | if (err) | |
3793 | return err; | |
b3546035 | 3794 | if (mddev->pers) { |
50ac168a | 3795 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
3796 | err = -EBUSY; |
3797 | else if (mddev->ro) | |
3798 | err = -EROFS; | |
3799 | else { | |
3800 | mddev->new_chunk_sectors = n >> 9; | |
3801 | err = mddev->pers->check_reshape(mddev); | |
3802 | if (err) | |
3803 | mddev->new_chunk_sectors = mddev->chunk_sectors; | |
597a711b | 3804 | } |
b3546035 | 3805 | } else { |
664e7c41 | 3806 | mddev->new_chunk_sectors = n >> 9; |
b3546035 | 3807 | if (mddev->reshape_position == MaxSector) |
9d8f0363 | 3808 | mddev->chunk_sectors = n >> 9; |
b3546035 | 3809 | } |
6791875e N |
3810 | mddev_unlock(mddev); |
3811 | return err ?: len; | |
3b34380a N |
3812 | } |
3813 | static struct md_sysfs_entry md_chunk_size = | |
80ca3a44 | 3814 | __ATTR(chunk_size, S_IRUGO|S_IWUSR, chunk_size_show, chunk_size_store); |
3b34380a | 3815 | |
a94213b1 | 3816 | static ssize_t |
fd01b88c | 3817 | resync_start_show(struct mddev *mddev, char *page) |
a94213b1 | 3818 | { |
d1a7c503 N |
3819 | if (mddev->recovery_cp == MaxSector) |
3820 | return sprintf(page, "none\n"); | |
a94213b1 N |
3821 | return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp); |
3822 | } | |
3823 | ||
3824 | static ssize_t | |
fd01b88c | 3825 | resync_start_store(struct mddev *mddev, const char *buf, size_t len) |
a94213b1 | 3826 | { |
4c9309c0 | 3827 | unsigned long long n; |
6791875e | 3828 | int err; |
4c9309c0 AD |
3829 | |
3830 | if (cmd_match(buf, "none")) | |
3831 | n = MaxSector; | |
3832 | else { | |
3833 | err = kstrtoull(buf, 10, &n); | |
3834 | if (err < 0) | |
3835 | return err; | |
3836 | if (n != (sector_t)n) | |
3837 | return -EINVAL; | |
3838 | } | |
a94213b1 | 3839 | |
6791875e N |
3840 | err = mddev_lock(mddev); |
3841 | if (err) | |
3842 | return err; | |
b098636c | 3843 | if (mddev->pers && !test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) |
6791875e | 3844 | err = -EBUSY; |
a94213b1 | 3845 | |
6791875e N |
3846 | if (!err) { |
3847 | mddev->recovery_cp = n; | |
3848 | if (mddev->pers) | |
2953079c | 3849 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
6791875e N |
3850 | } |
3851 | mddev_unlock(mddev); | |
3852 | return err ?: len; | |
a94213b1 N |
3853 | } |
3854 | static struct md_sysfs_entry md_resync_start = | |
750f199e N |
3855 | __ATTR_PREALLOC(resync_start, S_IRUGO|S_IWUSR, |
3856 | resync_start_show, resync_start_store); | |
a94213b1 | 3857 | |
9e653b63 N |
3858 | /* |
3859 | * The array state can be: | |
3860 | * | |
3861 | * clear | |
3862 | * No devices, no size, no level | |
3863 | * Equivalent to STOP_ARRAY ioctl | |
3864 | * inactive | |
3865 | * May have some settings, but array is not active | |
3866 | * all IO results in error | |
3867 | * When written, doesn't tear down array, but just stops it | |
3868 | * suspended (not supported yet) | |
3869 | * All IO requests will block. The array can be reconfigured. | |
910d8cb3 | 3870 | * Writing this, if accepted, will block until array is quiescent |
9e653b63 N |
3871 | * readonly |
3872 | * no resync can happen. no superblocks get written. | |
3873 | * write requests fail | |
3874 | * read-auto | |
3875 | * like readonly, but behaves like 'clean' on a write request. | |
3876 | * | |
3877 | * clean - no pending writes, but otherwise active. | |
3878 | * When written to inactive array, starts without resync | |
3879 | * If a write request arrives then | |
3880 | * if metadata is known, mark 'dirty' and switch to 'active'. | |
3881 | * if not known, block and switch to write-pending | |
3882 | * If written to an active array that has pending writes, then fails. | |
3883 | * active | |
3884 | * fully active: IO and resync can be happening. | |
3885 | * When written to inactive array, starts with resync | |
3886 | * | |
3887 | * write-pending | |
3888 | * clean, but writes are blocked waiting for 'active' to be written. | |
3889 | * | |
3890 | * active-idle | |
3891 | * like active, but no writes have been seen for a while (100msec). | |
3892 | * | |
3893 | */ | |
3894 | enum array_state { clear, inactive, suspended, readonly, read_auto, clean, active, | |
3895 | write_pending, active_idle, bad_word}; | |
05381954 | 3896 | static char *array_states[] = { |
9e653b63 N |
3897 | "clear", "inactive", "suspended", "readonly", "read-auto", "clean", "active", |
3898 | "write-pending", "active-idle", NULL }; | |
3899 | ||
3900 | static int match_word(const char *word, char **list) | |
3901 | { | |
3902 | int n; | |
3903 | for (n=0; list[n]; n++) | |
3904 | if (cmd_match(word, list[n])) | |
3905 | break; | |
3906 | return n; | |
3907 | } | |
3908 | ||
3909 | static ssize_t | |
fd01b88c | 3910 | array_state_show(struct mddev *mddev, char *page) |
9e653b63 N |
3911 | { |
3912 | enum array_state st = inactive; | |
3913 | ||
3914 | if (mddev->pers) | |
3915 | switch(mddev->ro) { | |
3916 | case 1: | |
3917 | st = readonly; | |
3918 | break; | |
3919 | case 2: | |
3920 | st = read_auto; | |
3921 | break; | |
3922 | case 0: | |
2953079c | 3923 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
e691063a | 3924 | st = write_pending; |
16f88949 TM |
3925 | else if (mddev->in_sync) |
3926 | st = clean; | |
9e653b63 N |
3927 | else if (mddev->safemode) |
3928 | st = active_idle; | |
3929 | else | |
3930 | st = active; | |
3931 | } | |
3932 | else { | |
3933 | if (list_empty(&mddev->disks) && | |
3934 | mddev->raid_disks == 0 && | |
58c0fed4 | 3935 | mddev->dev_sectors == 0) |
9e653b63 N |
3936 | st = clear; |
3937 | else | |
3938 | st = inactive; | |
3939 | } | |
3940 | return sprintf(page, "%s\n", array_states[st]); | |
3941 | } | |
3942 | ||
f72ffdd6 N |
3943 | static int do_md_stop(struct mddev *mddev, int ro, struct block_device *bdev); |
3944 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev); | |
3945 | static int do_md_run(struct mddev *mddev); | |
fd01b88c | 3946 | static int restart_array(struct mddev *mddev); |
9e653b63 N |
3947 | |
3948 | static ssize_t | |
fd01b88c | 3949 | array_state_store(struct mddev *mddev, const char *buf, size_t len) |
9e653b63 | 3950 | { |
6791875e | 3951 | int err; |
9e653b63 | 3952 | enum array_state st = match_word(buf, array_states); |
6791875e N |
3953 | |
3954 | if (mddev->pers && (st == active || st == clean) && mddev->ro != 1) { | |
3955 | /* don't take reconfig_mutex when toggling between | |
3956 | * clean and active | |
3957 | */ | |
3958 | spin_lock(&mddev->lock); | |
3959 | if (st == active) { | |
3960 | restart_array(mddev); | |
2953079c | 3961 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
91a6c4ad | 3962 | md_wakeup_thread(mddev->thread); |
6791875e N |
3963 | wake_up(&mddev->sb_wait); |
3964 | err = 0; | |
3965 | } else /* st == clean */ { | |
3966 | restart_array(mddev); | |
3967 | if (atomic_read(&mddev->writes_pending) == 0) { | |
3968 | if (mddev->in_sync == 0) { | |
3969 | mddev->in_sync = 1; | |
3970 | if (mddev->safemode == 1) | |
3971 | mddev->safemode = 0; | |
2953079c | 3972 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
6791875e N |
3973 | } |
3974 | err = 0; | |
3975 | } else | |
3976 | err = -EBUSY; | |
3977 | } | |
573275b5 TM |
3978 | if (!err) |
3979 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
6791875e | 3980 | spin_unlock(&mddev->lock); |
c008f1d3 | 3981 | return err ?: len; |
6791875e N |
3982 | } |
3983 | err = mddev_lock(mddev); | |
3984 | if (err) | |
3985 | return err; | |
3986 | err = -EINVAL; | |
9e653b63 N |
3987 | switch(st) { |
3988 | case bad_word: | |
3989 | break; | |
3990 | case clear: | |
3991 | /* stopping an active array */ | |
a05b7ea0 | 3992 | err = do_md_stop(mddev, 0, NULL); |
9e653b63 N |
3993 | break; |
3994 | case inactive: | |
3995 | /* stopping an active array */ | |
90cf195d | 3996 | if (mddev->pers) |
a05b7ea0 | 3997 | err = do_md_stop(mddev, 2, NULL); |
90cf195d | 3998 | else |
e691063a | 3999 | err = 0; /* already inactive */ |
9e653b63 N |
4000 | break; |
4001 | case suspended: | |
4002 | break; /* not supported yet */ | |
4003 | case readonly: | |
4004 | if (mddev->pers) | |
a05b7ea0 | 4005 | err = md_set_readonly(mddev, NULL); |
9e653b63 N |
4006 | else { |
4007 | mddev->ro = 1; | |
648b629e | 4008 | set_disk_ro(mddev->gendisk, 1); |
9e653b63 N |
4009 | err = do_md_run(mddev); |
4010 | } | |
4011 | break; | |
4012 | case read_auto: | |
9e653b63 | 4013 | if (mddev->pers) { |
80268ee9 | 4014 | if (mddev->ro == 0) |
a05b7ea0 | 4015 | err = md_set_readonly(mddev, NULL); |
80268ee9 | 4016 | else if (mddev->ro == 1) |
648b629e N |
4017 | err = restart_array(mddev); |
4018 | if (err == 0) { | |
4019 | mddev->ro = 2; | |
4020 | set_disk_ro(mddev->gendisk, 0); | |
4021 | } | |
9e653b63 N |
4022 | } else { |
4023 | mddev->ro = 2; | |
4024 | err = do_md_run(mddev); | |
4025 | } | |
4026 | break; | |
4027 | case clean: | |
4028 | if (mddev->pers) { | |
339421de SL |
4029 | err = restart_array(mddev); |
4030 | if (err) | |
4031 | break; | |
85572d7c | 4032 | spin_lock(&mddev->lock); |
9e653b63 | 4033 | if (atomic_read(&mddev->writes_pending) == 0) { |
e691063a N |
4034 | if (mddev->in_sync == 0) { |
4035 | mddev->in_sync = 1; | |
31a59e34 N |
4036 | if (mddev->safemode == 1) |
4037 | mddev->safemode = 0; | |
2953079c | 4038 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
e691063a N |
4039 | } |
4040 | err = 0; | |
4041 | } else | |
4042 | err = -EBUSY; | |
85572d7c | 4043 | spin_unlock(&mddev->lock); |
5bf29597 N |
4044 | } else |
4045 | err = -EINVAL; | |
9e653b63 N |
4046 | break; |
4047 | case active: | |
4048 | if (mddev->pers) { | |
339421de SL |
4049 | err = restart_array(mddev); |
4050 | if (err) | |
4051 | break; | |
2953079c | 4052 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
9e653b63 N |
4053 | wake_up(&mddev->sb_wait); |
4054 | err = 0; | |
4055 | } else { | |
4056 | mddev->ro = 0; | |
648b629e | 4057 | set_disk_ro(mddev->gendisk, 0); |
9e653b63 N |
4058 | err = do_md_run(mddev); |
4059 | } | |
4060 | break; | |
4061 | case write_pending: | |
4062 | case active_idle: | |
4063 | /* these cannot be set */ | |
4064 | break; | |
4065 | } | |
6791875e N |
4066 | |
4067 | if (!err) { | |
1d23f178 N |
4068 | if (mddev->hold_active == UNTIL_IOCTL) |
4069 | mddev->hold_active = 0; | |
00bcb4ac | 4070 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 4071 | } |
6791875e N |
4072 | mddev_unlock(mddev); |
4073 | return err ?: len; | |
9e653b63 | 4074 | } |
80ca3a44 | 4075 | static struct md_sysfs_entry md_array_state = |
750f199e | 4076 | __ATTR_PREALLOC(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store); |
9e653b63 | 4077 | |
1e50915f | 4078 | static ssize_t |
fd01b88c | 4079 | max_corrected_read_errors_show(struct mddev *mddev, char *page) { |
1e50915f RB |
4080 | return sprintf(page, "%d\n", |
4081 | atomic_read(&mddev->max_corr_read_errors)); | |
4082 | } | |
4083 | ||
4084 | static ssize_t | |
fd01b88c | 4085 | max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len) |
1e50915f | 4086 | { |
4c9309c0 AD |
4087 | unsigned int n; |
4088 | int rv; | |
1e50915f | 4089 | |
4c9309c0 AD |
4090 | rv = kstrtouint(buf, 10, &n); |
4091 | if (rv < 0) | |
4092 | return rv; | |
4093 | atomic_set(&mddev->max_corr_read_errors, n); | |
4094 | return len; | |
1e50915f RB |
4095 | } |
4096 | ||
4097 | static struct md_sysfs_entry max_corr_read_errors = | |
4098 | __ATTR(max_read_errors, S_IRUGO|S_IWUSR, max_corrected_read_errors_show, | |
4099 | max_corrected_read_errors_store); | |
4100 | ||
6d7ff738 | 4101 | static ssize_t |
fd01b88c | 4102 | null_show(struct mddev *mddev, char *page) |
6d7ff738 N |
4103 | { |
4104 | return -EINVAL; | |
4105 | } | |
4106 | ||
4107 | static ssize_t | |
fd01b88c | 4108 | new_dev_store(struct mddev *mddev, const char *buf, size_t len) |
6d7ff738 N |
4109 | { |
4110 | /* buf must be %d:%d\n? giving major and minor numbers */ | |
4111 | /* The new device is added to the array. | |
4112 | * If the array has a persistent superblock, we read the | |
4113 | * superblock to initialise info and check validity. | |
4114 | * Otherwise, only checking done is that in bind_rdev_to_array, | |
4115 | * which mainly checks size. | |
4116 | */ | |
4117 | char *e; | |
4118 | int major = simple_strtoul(buf, &e, 10); | |
4119 | int minor; | |
4120 | dev_t dev; | |
3cb03002 | 4121 | struct md_rdev *rdev; |
6d7ff738 N |
4122 | int err; |
4123 | ||
4124 | if (!*buf || *e != ':' || !e[1] || e[1] == '\n') | |
4125 | return -EINVAL; | |
4126 | minor = simple_strtoul(e+1, &e, 10); | |
4127 | if (*e && *e != '\n') | |
4128 | return -EINVAL; | |
4129 | dev = MKDEV(major, minor); | |
4130 | if (major != MAJOR(dev) || | |
4131 | minor != MINOR(dev)) | |
4132 | return -EOVERFLOW; | |
4133 | ||
6791875e N |
4134 | flush_workqueue(md_misc_wq); |
4135 | ||
4136 | err = mddev_lock(mddev); | |
4137 | if (err) | |
4138 | return err; | |
6d7ff738 N |
4139 | if (mddev->persistent) { |
4140 | rdev = md_import_device(dev, mddev->major_version, | |
4141 | mddev->minor_version); | |
4142 | if (!IS_ERR(rdev) && !list_empty(&mddev->disks)) { | |
3cb03002 N |
4143 | struct md_rdev *rdev0 |
4144 | = list_entry(mddev->disks.next, | |
4145 | struct md_rdev, same_set); | |
6d7ff738 N |
4146 | err = super_types[mddev->major_version] |
4147 | .load_super(rdev, rdev0, mddev->minor_version); | |
4148 | if (err < 0) | |
4149 | goto out; | |
4150 | } | |
c5d79adb N |
4151 | } else if (mddev->external) |
4152 | rdev = md_import_device(dev, -2, -1); | |
4153 | else | |
6d7ff738 N |
4154 | rdev = md_import_device(dev, -1, -1); |
4155 | ||
9a8c0fa8 N |
4156 | if (IS_ERR(rdev)) { |
4157 | mddev_unlock(mddev); | |
6d7ff738 | 4158 | return PTR_ERR(rdev); |
9a8c0fa8 | 4159 | } |
6d7ff738 N |
4160 | err = bind_rdev_to_array(rdev, mddev); |
4161 | out: | |
4162 | if (err) | |
4163 | export_rdev(rdev); | |
6791875e | 4164 | mddev_unlock(mddev); |
6d7ff738 N |
4165 | return err ? err : len; |
4166 | } | |
4167 | ||
4168 | static struct md_sysfs_entry md_new_device = | |
80ca3a44 | 4169 | __ATTR(new_dev, S_IWUSR, null_show, new_dev_store); |
3b34380a | 4170 | |
9b1d1dac | 4171 | static ssize_t |
fd01b88c | 4172 | bitmap_store(struct mddev *mddev, const char *buf, size_t len) |
9b1d1dac PC |
4173 | { |
4174 | char *end; | |
4175 | unsigned long chunk, end_chunk; | |
6791875e | 4176 | int err; |
9b1d1dac | 4177 | |
6791875e N |
4178 | err = mddev_lock(mddev); |
4179 | if (err) | |
4180 | return err; | |
9b1d1dac PC |
4181 | if (!mddev->bitmap) |
4182 | goto out; | |
4183 | /* buf should be <chunk> <chunk> ... or <chunk>-<chunk> ... (range) */ | |
4184 | while (*buf) { | |
4185 | chunk = end_chunk = simple_strtoul(buf, &end, 0); | |
4186 | if (buf == end) break; | |
4187 | if (*end == '-') { /* range */ | |
4188 | buf = end + 1; | |
4189 | end_chunk = simple_strtoul(buf, &end, 0); | |
4190 | if (buf == end) break; | |
4191 | } | |
4192 | if (*end && !isspace(*end)) break; | |
4193 | bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk); | |
e7d2860b | 4194 | buf = skip_spaces(end); |
9b1d1dac PC |
4195 | } |
4196 | bitmap_unplug(mddev->bitmap); /* flush the bits to disk */ | |
4197 | out: | |
6791875e | 4198 | mddev_unlock(mddev); |
9b1d1dac PC |
4199 | return len; |
4200 | } | |
4201 | ||
4202 | static struct md_sysfs_entry md_bitmap = | |
4203 | __ATTR(bitmap_set_bits, S_IWUSR, null_show, bitmap_store); | |
4204 | ||
a35b0d69 | 4205 | static ssize_t |
fd01b88c | 4206 | size_show(struct mddev *mddev, char *page) |
a35b0d69 | 4207 | { |
58c0fed4 AN |
4208 | return sprintf(page, "%llu\n", |
4209 | (unsigned long long)mddev->dev_sectors / 2); | |
a35b0d69 N |
4210 | } |
4211 | ||
fd01b88c | 4212 | static int update_size(struct mddev *mddev, sector_t num_sectors); |
a35b0d69 N |
4213 | |
4214 | static ssize_t | |
fd01b88c | 4215 | size_store(struct mddev *mddev, const char *buf, size_t len) |
a35b0d69 N |
4216 | { |
4217 | /* If array is inactive, we can reduce the component size, but | |
4218 | * not increase it (except from 0). | |
4219 | * If array is active, we can try an on-line resize | |
4220 | */ | |
b522adcd DW |
4221 | sector_t sectors; |
4222 | int err = strict_blocks_to_sectors(buf, §ors); | |
a35b0d69 | 4223 | |
58c0fed4 AN |
4224 | if (err < 0) |
4225 | return err; | |
6791875e N |
4226 | err = mddev_lock(mddev); |
4227 | if (err) | |
4228 | return err; | |
a35b0d69 | 4229 | if (mddev->pers) { |
58c0fed4 | 4230 | err = update_size(mddev, sectors); |
4ba1e788 XN |
4231 | if (err == 0) |
4232 | md_update_sb(mddev, 1); | |
a35b0d69 | 4233 | } else { |
58c0fed4 AN |
4234 | if (mddev->dev_sectors == 0 || |
4235 | mddev->dev_sectors > sectors) | |
4236 | mddev->dev_sectors = sectors; | |
a35b0d69 N |
4237 | else |
4238 | err = -ENOSPC; | |
4239 | } | |
6791875e | 4240 | mddev_unlock(mddev); |
a35b0d69 N |
4241 | return err ? err : len; |
4242 | } | |
4243 | ||
4244 | static struct md_sysfs_entry md_size = | |
80ca3a44 | 4245 | __ATTR(component_size, S_IRUGO|S_IWUSR, size_show, size_store); |
a35b0d69 | 4246 | |
83f0d77a | 4247 | /* Metadata version. |
e691063a N |
4248 | * This is one of |
4249 | * 'none' for arrays with no metadata (good luck...) | |
4250 | * 'external' for arrays with externally managed metadata, | |
8bb93aac N |
4251 | * or N.M for internally known formats |
4252 | */ | |
4253 | static ssize_t | |
fd01b88c | 4254 | metadata_show(struct mddev *mddev, char *page) |
8bb93aac N |
4255 | { |
4256 | if (mddev->persistent) | |
4257 | return sprintf(page, "%d.%d\n", | |
4258 | mddev->major_version, mddev->minor_version); | |
e691063a N |
4259 | else if (mddev->external) |
4260 | return sprintf(page, "external:%s\n", mddev->metadata_type); | |
8bb93aac N |
4261 | else |
4262 | return sprintf(page, "none\n"); | |
4263 | } | |
4264 | ||
4265 | static ssize_t | |
fd01b88c | 4266 | metadata_store(struct mddev *mddev, const char *buf, size_t len) |
8bb93aac N |
4267 | { |
4268 | int major, minor; | |
4269 | char *e; | |
6791875e | 4270 | int err; |
ea43ddd8 N |
4271 | /* Changing the details of 'external' metadata is |
4272 | * always permitted. Otherwise there must be | |
4273 | * no devices attached to the array. | |
4274 | */ | |
6791875e N |
4275 | |
4276 | err = mddev_lock(mddev); | |
4277 | if (err) | |
4278 | return err; | |
4279 | err = -EBUSY; | |
ea43ddd8 N |
4280 | if (mddev->external && strncmp(buf, "external:", 9) == 0) |
4281 | ; | |
4282 | else if (!list_empty(&mddev->disks)) | |
6791875e | 4283 | goto out_unlock; |
8bb93aac | 4284 | |
6791875e | 4285 | err = 0; |
8bb93aac N |
4286 | if (cmd_match(buf, "none")) { |
4287 | mddev->persistent = 0; | |
e691063a N |
4288 | mddev->external = 0; |
4289 | mddev->major_version = 0; | |
4290 | mddev->minor_version = 90; | |
6791875e | 4291 | goto out_unlock; |
e691063a N |
4292 | } |
4293 | if (strncmp(buf, "external:", 9) == 0) { | |
20a49ff6 | 4294 | size_t namelen = len-9; |
e691063a N |
4295 | if (namelen >= sizeof(mddev->metadata_type)) |
4296 | namelen = sizeof(mddev->metadata_type)-1; | |
4297 | strncpy(mddev->metadata_type, buf+9, namelen); | |
4298 | mddev->metadata_type[namelen] = 0; | |
4299 | if (namelen && mddev->metadata_type[namelen-1] == '\n') | |
4300 | mddev->metadata_type[--namelen] = 0; | |
4301 | mddev->persistent = 0; | |
4302 | mddev->external = 1; | |
8bb93aac N |
4303 | mddev->major_version = 0; |
4304 | mddev->minor_version = 90; | |
6791875e | 4305 | goto out_unlock; |
8bb93aac N |
4306 | } |
4307 | major = simple_strtoul(buf, &e, 10); | |
6791875e | 4308 | err = -EINVAL; |
8bb93aac | 4309 | if (e==buf || *e != '.') |
6791875e | 4310 | goto out_unlock; |
8bb93aac N |
4311 | buf = e+1; |
4312 | minor = simple_strtoul(buf, &e, 10); | |
3f9d7b0d | 4313 | if (e==buf || (*e && *e != '\n') ) |
6791875e N |
4314 | goto out_unlock; |
4315 | err = -ENOENT; | |
50511da3 | 4316 | if (major >= ARRAY_SIZE(super_types) || super_types[major].name == NULL) |
6791875e | 4317 | goto out_unlock; |
8bb93aac N |
4318 | mddev->major_version = major; |
4319 | mddev->minor_version = minor; | |
4320 | mddev->persistent = 1; | |
e691063a | 4321 | mddev->external = 0; |
6791875e N |
4322 | err = 0; |
4323 | out_unlock: | |
4324 | mddev_unlock(mddev); | |
4325 | return err ?: len; | |
8bb93aac N |
4326 | } |
4327 | ||
4328 | static struct md_sysfs_entry md_metadata = | |
750f199e | 4329 | __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store); |
8bb93aac | 4330 | |
24dd469d | 4331 | static ssize_t |
fd01b88c | 4332 | action_show(struct mddev *mddev, char *page) |
24dd469d | 4333 | { |
7eec314d | 4334 | char *type = "idle"; |
b7b17c9b N |
4335 | unsigned long recovery = mddev->recovery; |
4336 | if (test_bit(MD_RECOVERY_FROZEN, &recovery)) | |
b6a9ce68 | 4337 | type = "frozen"; |
b7b17c9b N |
4338 | else if (test_bit(MD_RECOVERY_RUNNING, &recovery) || |
4339 | (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &recovery))) { | |
4340 | if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) | |
ccfcc3c1 | 4341 | type = "reshape"; |
b7b17c9b N |
4342 | else if (test_bit(MD_RECOVERY_SYNC, &recovery)) { |
4343 | if (!test_bit(MD_RECOVERY_REQUESTED, &recovery)) | |
24dd469d | 4344 | type = "resync"; |
b7b17c9b | 4345 | else if (test_bit(MD_RECOVERY_CHECK, &recovery)) |
24dd469d N |
4346 | type = "check"; |
4347 | else | |
4348 | type = "repair"; | |
b7b17c9b | 4349 | } else if (test_bit(MD_RECOVERY_RECOVER, &recovery)) |
24dd469d | 4350 | type = "recover"; |
985ca973 N |
4351 | else if (mddev->reshape_position != MaxSector) |
4352 | type = "reshape"; | |
24dd469d N |
4353 | } |
4354 | return sprintf(page, "%s\n", type); | |
4355 | } | |
4356 | ||
4357 | static ssize_t | |
fd01b88c | 4358 | action_store(struct mddev *mddev, const char *page, size_t len) |
24dd469d | 4359 | { |
7eec314d N |
4360 | if (!mddev->pers || !mddev->pers->sync_request) |
4361 | return -EINVAL; | |
4362 | ||
b6a9ce68 N |
4363 | |
4364 | if (cmd_match(page, "idle") || cmd_match(page, "frozen")) { | |
56ccc112 N |
4365 | if (cmd_match(page, "frozen")) |
4366 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4367 | else | |
4368 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
8e8e2518 N |
4369 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
4370 | mddev_lock(mddev) == 0) { | |
4371 | flush_workqueue(md_misc_wq); | |
4372 | if (mddev->sync_thread) { | |
4373 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
6791875e | 4374 | md_reap_sync_thread(mddev); |
6791875e | 4375 | } |
8e8e2518 | 4376 | mddev_unlock(mddev); |
7eec314d | 4377 | } |
312045ee | 4378 | } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
24dd469d | 4379 | return -EBUSY; |
72a23c21 | 4380 | else if (cmd_match(page, "resync")) |
56ccc112 | 4381 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4382 | else if (cmd_match(page, "recover")) { |
56ccc112 | 4383 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4384 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
72a23c21 | 4385 | } else if (cmd_match(page, "reshape")) { |
16484bf5 N |
4386 | int err; |
4387 | if (mddev->pers->start_reshape == NULL) | |
4388 | return -EINVAL; | |
6791875e N |
4389 | err = mddev_lock(mddev); |
4390 | if (!err) { | |
312045ee N |
4391 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4392 | err = -EBUSY; | |
4393 | else { | |
4394 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4395 | err = mddev->pers->start_reshape(mddev); | |
4396 | } | |
6791875e N |
4397 | mddev_unlock(mddev); |
4398 | } | |
16484bf5 N |
4399 | if (err) |
4400 | return err; | |
a99ac971 | 4401 | sysfs_notify(&mddev->kobj, NULL, "degraded"); |
16484bf5 | 4402 | } else { |
bce74dac | 4403 | if (cmd_match(page, "check")) |
7eec314d | 4404 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
2adc7d47 | 4405 | else if (!cmd_match(page, "repair")) |
7eec314d | 4406 | return -EINVAL; |
56ccc112 | 4407 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
7eec314d N |
4408 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
4409 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
7eec314d | 4410 | } |
48c26ddc N |
4411 | if (mddev->ro == 2) { |
4412 | /* A write to sync_action is enough to justify | |
4413 | * canceling read-auto mode | |
4414 | */ | |
4415 | mddev->ro = 0; | |
4416 | md_wakeup_thread(mddev->sync_thread); | |
4417 | } | |
03c902e1 | 4418 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
24dd469d | 4419 | md_wakeup_thread(mddev->thread); |
00bcb4ac | 4420 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
24dd469d N |
4421 | return len; |
4422 | } | |
4423 | ||
c4a39551 | 4424 | static struct md_sysfs_entry md_scan_mode = |
750f199e | 4425 | __ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store); |
c4a39551 JB |
4426 | |
4427 | static ssize_t | |
4428 | last_sync_action_show(struct mddev *mddev, char *page) | |
4429 | { | |
4430 | return sprintf(page, "%s\n", mddev->last_sync_action); | |
4431 | } | |
4432 | ||
4433 | static struct md_sysfs_entry md_last_scan_mode = __ATTR_RO(last_sync_action); | |
4434 | ||
9d88883e | 4435 | static ssize_t |
fd01b88c | 4436 | mismatch_cnt_show(struct mddev *mddev, char *page) |
9d88883e N |
4437 | { |
4438 | return sprintf(page, "%llu\n", | |
7f7583d4 JM |
4439 | (unsigned long long) |
4440 | atomic64_read(&mddev->resync_mismatches)); | |
9d88883e N |
4441 | } |
4442 | ||
80ca3a44 | 4443 | static struct md_sysfs_entry md_mismatches = __ATTR_RO(mismatch_cnt); |
9d88883e | 4444 | |
88202a0c | 4445 | static ssize_t |
fd01b88c | 4446 | sync_min_show(struct mddev *mddev, char *page) |
88202a0c N |
4447 | { |
4448 | return sprintf(page, "%d (%s)\n", speed_min(mddev), | |
4449 | mddev->sync_speed_min ? "local": "system"); | |
4450 | } | |
4451 | ||
4452 | static ssize_t | |
fd01b88c | 4453 | sync_min_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4454 | { |
4c9309c0 AD |
4455 | unsigned int min; |
4456 | int rv; | |
4457 | ||
88202a0c | 4458 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4459 | min = 0; |
4460 | } else { | |
4461 | rv = kstrtouint(buf, 10, &min); | |
4462 | if (rv < 0) | |
4463 | return rv; | |
4464 | if (min == 0) | |
4465 | return -EINVAL; | |
88202a0c | 4466 | } |
88202a0c N |
4467 | mddev->sync_speed_min = min; |
4468 | return len; | |
4469 | } | |
4470 | ||
4471 | static struct md_sysfs_entry md_sync_min = | |
4472 | __ATTR(sync_speed_min, S_IRUGO|S_IWUSR, sync_min_show, sync_min_store); | |
4473 | ||
4474 | static ssize_t | |
fd01b88c | 4475 | sync_max_show(struct mddev *mddev, char *page) |
88202a0c N |
4476 | { |
4477 | return sprintf(page, "%d (%s)\n", speed_max(mddev), | |
4478 | mddev->sync_speed_max ? "local": "system"); | |
4479 | } | |
4480 | ||
4481 | static ssize_t | |
fd01b88c | 4482 | sync_max_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4483 | { |
4c9309c0 AD |
4484 | unsigned int max; |
4485 | int rv; | |
4486 | ||
88202a0c | 4487 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4488 | max = 0; |
4489 | } else { | |
4490 | rv = kstrtouint(buf, 10, &max); | |
4491 | if (rv < 0) | |
4492 | return rv; | |
4493 | if (max == 0) | |
4494 | return -EINVAL; | |
88202a0c | 4495 | } |
88202a0c N |
4496 | mddev->sync_speed_max = max; |
4497 | return len; | |
4498 | } | |
4499 | ||
4500 | static struct md_sysfs_entry md_sync_max = | |
4501 | __ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store); | |
4502 | ||
d7f3d291 | 4503 | static ssize_t |
fd01b88c | 4504 | degraded_show(struct mddev *mddev, char *page) |
d7f3d291 IP |
4505 | { |
4506 | return sprintf(page, "%d\n", mddev->degraded); | |
4507 | } | |
4508 | static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded); | |
88202a0c | 4509 | |
90b08710 | 4510 | static ssize_t |
fd01b88c | 4511 | sync_force_parallel_show(struct mddev *mddev, char *page) |
90b08710 BS |
4512 | { |
4513 | return sprintf(page, "%d\n", mddev->parallel_resync); | |
4514 | } | |
4515 | ||
4516 | static ssize_t | |
fd01b88c | 4517 | sync_force_parallel_store(struct mddev *mddev, const char *buf, size_t len) |
90b08710 BS |
4518 | { |
4519 | long n; | |
4520 | ||
b29bebd6 | 4521 | if (kstrtol(buf, 10, &n)) |
90b08710 BS |
4522 | return -EINVAL; |
4523 | ||
4524 | if (n != 0 && n != 1) | |
4525 | return -EINVAL; | |
4526 | ||
4527 | mddev->parallel_resync = n; | |
4528 | ||
4529 | if (mddev->sync_thread) | |
4530 | wake_up(&resync_wait); | |
4531 | ||
4532 | return len; | |
4533 | } | |
4534 | ||
4535 | /* force parallel resync, even with shared block devices */ | |
4536 | static struct md_sysfs_entry md_sync_force_parallel = | |
4537 | __ATTR(sync_force_parallel, S_IRUGO|S_IWUSR, | |
4538 | sync_force_parallel_show, sync_force_parallel_store); | |
4539 | ||
88202a0c | 4540 | static ssize_t |
fd01b88c | 4541 | sync_speed_show(struct mddev *mddev, char *page) |
88202a0c N |
4542 | { |
4543 | unsigned long resync, dt, db; | |
d1a7c503 N |
4544 | if (mddev->curr_resync == 0) |
4545 | return sprintf(page, "none\n"); | |
9687a60c AN |
4546 | resync = mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active); |
4547 | dt = (jiffies - mddev->resync_mark) / HZ; | |
88202a0c | 4548 | if (!dt) dt++; |
9687a60c AN |
4549 | db = resync - mddev->resync_mark_cnt; |
4550 | return sprintf(page, "%lu\n", db/dt/2); /* K/sec */ | |
88202a0c N |
4551 | } |
4552 | ||
80ca3a44 | 4553 | static struct md_sysfs_entry md_sync_speed = __ATTR_RO(sync_speed); |
88202a0c N |
4554 | |
4555 | static ssize_t | |
fd01b88c | 4556 | sync_completed_show(struct mddev *mddev, char *page) |
88202a0c | 4557 | { |
13ae864b | 4558 | unsigned long long max_sectors, resync; |
88202a0c | 4559 | |
acb180b0 N |
4560 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4561 | return sprintf(page, "none\n"); | |
4562 | ||
72f36d59 N |
4563 | if (mddev->curr_resync == 1 || |
4564 | mddev->curr_resync == 2) | |
4565 | return sprintf(page, "delayed\n"); | |
4566 | ||
c804cdec N |
4567 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
4568 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
58c0fed4 | 4569 | max_sectors = mddev->resync_max_sectors; |
88202a0c | 4570 | else |
58c0fed4 | 4571 | max_sectors = mddev->dev_sectors; |
88202a0c | 4572 | |
acb180b0 | 4573 | resync = mddev->curr_resync_completed; |
13ae864b | 4574 | return sprintf(page, "%llu / %llu\n", resync, max_sectors); |
88202a0c N |
4575 | } |
4576 | ||
750f199e N |
4577 | static struct md_sysfs_entry md_sync_completed = |
4578 | __ATTR_PREALLOC(sync_completed, S_IRUGO, sync_completed_show, NULL); | |
88202a0c | 4579 | |
5e96ee65 | 4580 | static ssize_t |
fd01b88c | 4581 | min_sync_show(struct mddev *mddev, char *page) |
5e96ee65 NB |
4582 | { |
4583 | return sprintf(page, "%llu\n", | |
4584 | (unsigned long long)mddev->resync_min); | |
4585 | } | |
4586 | static ssize_t | |
fd01b88c | 4587 | min_sync_store(struct mddev *mddev, const char *buf, size_t len) |
5e96ee65 NB |
4588 | { |
4589 | unsigned long long min; | |
23da422b | 4590 | int err; |
23da422b | 4591 | |
b29bebd6 | 4592 | if (kstrtoull(buf, 10, &min)) |
5e96ee65 | 4593 | return -EINVAL; |
23da422b N |
4594 | |
4595 | spin_lock(&mddev->lock); | |
4596 | err = -EINVAL; | |
5e96ee65 | 4597 | if (min > mddev->resync_max) |
23da422b N |
4598 | goto out_unlock; |
4599 | ||
4600 | err = -EBUSY; | |
5e96ee65 | 4601 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 4602 | goto out_unlock; |
5e96ee65 | 4603 | |
50c37b13 N |
4604 | /* Round down to multiple of 4K for safety */ |
4605 | mddev->resync_min = round_down(min, 8); | |
23da422b | 4606 | err = 0; |
5e96ee65 | 4607 | |
23da422b N |
4608 | out_unlock: |
4609 | spin_unlock(&mddev->lock); | |
4610 | return err ?: len; | |
5e96ee65 NB |
4611 | } |
4612 | ||
4613 | static struct md_sysfs_entry md_min_sync = | |
4614 | __ATTR(sync_min, S_IRUGO|S_IWUSR, min_sync_show, min_sync_store); | |
4615 | ||
c6207277 | 4616 | static ssize_t |
fd01b88c | 4617 | max_sync_show(struct mddev *mddev, char *page) |
c6207277 N |
4618 | { |
4619 | if (mddev->resync_max == MaxSector) | |
4620 | return sprintf(page, "max\n"); | |
4621 | else | |
4622 | return sprintf(page, "%llu\n", | |
4623 | (unsigned long long)mddev->resync_max); | |
4624 | } | |
4625 | static ssize_t | |
fd01b88c | 4626 | max_sync_store(struct mddev *mddev, const char *buf, size_t len) |
c6207277 | 4627 | { |
23da422b N |
4628 | int err; |
4629 | spin_lock(&mddev->lock); | |
c6207277 N |
4630 | if (strncmp(buf, "max", 3) == 0) |
4631 | mddev->resync_max = MaxSector; | |
4632 | else { | |
5e96ee65 | 4633 | unsigned long long max; |
23da422b N |
4634 | int chunk; |
4635 | ||
4636 | err = -EINVAL; | |
b29bebd6 | 4637 | if (kstrtoull(buf, 10, &max)) |
23da422b | 4638 | goto out_unlock; |
5e96ee65 | 4639 | if (max < mddev->resync_min) |
23da422b N |
4640 | goto out_unlock; |
4641 | ||
4642 | err = -EBUSY; | |
c6207277 | 4643 | if (max < mddev->resync_max && |
4d484a4a | 4644 | mddev->ro == 0 && |
c6207277 | 4645 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 4646 | goto out_unlock; |
c6207277 N |
4647 | |
4648 | /* Must be a multiple of chunk_size */ | |
23da422b N |
4649 | chunk = mddev->chunk_sectors; |
4650 | if (chunk) { | |
2ac06c33 | 4651 | sector_t temp = max; |
23da422b N |
4652 | |
4653 | err = -EINVAL; | |
4654 | if (sector_div(temp, chunk)) | |
4655 | goto out_unlock; | |
c6207277 N |
4656 | } |
4657 | mddev->resync_max = max; | |
4658 | } | |
4659 | wake_up(&mddev->recovery_wait); | |
23da422b N |
4660 | err = 0; |
4661 | out_unlock: | |
4662 | spin_unlock(&mddev->lock); | |
4663 | return err ?: len; | |
c6207277 N |
4664 | } |
4665 | ||
4666 | static struct md_sysfs_entry md_max_sync = | |
4667 | __ATTR(sync_max, S_IRUGO|S_IWUSR, max_sync_show, max_sync_store); | |
4668 | ||
e464eafd | 4669 | static ssize_t |
fd01b88c | 4670 | suspend_lo_show(struct mddev *mddev, char *page) |
e464eafd N |
4671 | { |
4672 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_lo); | |
4673 | } | |
4674 | ||
4675 | static ssize_t | |
fd01b88c | 4676 | suspend_lo_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 4677 | { |
4c9309c0 | 4678 | unsigned long long old, new; |
6791875e | 4679 | int err; |
e464eafd | 4680 | |
4c9309c0 AD |
4681 | err = kstrtoull(buf, 10, &new); |
4682 | if (err < 0) | |
4683 | return err; | |
4684 | if (new != (sector_t)new) | |
e464eafd | 4685 | return -EINVAL; |
23ddff37 | 4686 | |
6791875e N |
4687 | err = mddev_lock(mddev); |
4688 | if (err) | |
4689 | return err; | |
4690 | err = -EINVAL; | |
4691 | if (mddev->pers == NULL || | |
4692 | mddev->pers->quiesce == NULL) | |
4693 | goto unlock; | |
4694 | old = mddev->suspend_lo; | |
23ddff37 N |
4695 | mddev->suspend_lo = new; |
4696 | if (new >= old) | |
4697 | /* Shrinking suspended region */ | |
e464eafd | 4698 | mddev->pers->quiesce(mddev, 2); |
23ddff37 N |
4699 | else { |
4700 | /* Expanding suspended region - need to wait */ | |
4701 | mddev->pers->quiesce(mddev, 1); | |
4702 | mddev->pers->quiesce(mddev, 0); | |
4703 | } | |
6791875e N |
4704 | err = 0; |
4705 | unlock: | |
4706 | mddev_unlock(mddev); | |
4707 | return err ?: len; | |
e464eafd N |
4708 | } |
4709 | static struct md_sysfs_entry md_suspend_lo = | |
4710 | __ATTR(suspend_lo, S_IRUGO|S_IWUSR, suspend_lo_show, suspend_lo_store); | |
4711 | ||
e464eafd | 4712 | static ssize_t |
fd01b88c | 4713 | suspend_hi_show(struct mddev *mddev, char *page) |
e464eafd N |
4714 | { |
4715 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_hi); | |
4716 | } | |
4717 | ||
4718 | static ssize_t | |
fd01b88c | 4719 | suspend_hi_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 4720 | { |
4c9309c0 | 4721 | unsigned long long old, new; |
6791875e | 4722 | int err; |
e464eafd | 4723 | |
4c9309c0 AD |
4724 | err = kstrtoull(buf, 10, &new); |
4725 | if (err < 0) | |
4726 | return err; | |
4727 | if (new != (sector_t)new) | |
e464eafd | 4728 | return -EINVAL; |
23ddff37 | 4729 | |
6791875e N |
4730 | err = mddev_lock(mddev); |
4731 | if (err) | |
4732 | return err; | |
4733 | err = -EINVAL; | |
4734 | if (mddev->pers == NULL || | |
4735 | mddev->pers->quiesce == NULL) | |
4736 | goto unlock; | |
4737 | old = mddev->suspend_hi; | |
23ddff37 N |
4738 | mddev->suspend_hi = new; |
4739 | if (new <= old) | |
4740 | /* Shrinking suspended region */ | |
4741 | mddev->pers->quiesce(mddev, 2); | |
4742 | else { | |
4743 | /* Expanding suspended region - need to wait */ | |
e464eafd N |
4744 | mddev->pers->quiesce(mddev, 1); |
4745 | mddev->pers->quiesce(mddev, 0); | |
23ddff37 | 4746 | } |
6791875e N |
4747 | err = 0; |
4748 | unlock: | |
4749 | mddev_unlock(mddev); | |
4750 | return err ?: len; | |
e464eafd N |
4751 | } |
4752 | static struct md_sysfs_entry md_suspend_hi = | |
4753 | __ATTR(suspend_hi, S_IRUGO|S_IWUSR, suspend_hi_show, suspend_hi_store); | |
4754 | ||
08a02ecd | 4755 | static ssize_t |
fd01b88c | 4756 | reshape_position_show(struct mddev *mddev, char *page) |
08a02ecd N |
4757 | { |
4758 | if (mddev->reshape_position != MaxSector) | |
4759 | return sprintf(page, "%llu\n", | |
4760 | (unsigned long long)mddev->reshape_position); | |
4761 | strcpy(page, "none\n"); | |
4762 | return 5; | |
4763 | } | |
4764 | ||
4765 | static ssize_t | |
fd01b88c | 4766 | reshape_position_store(struct mddev *mddev, const char *buf, size_t len) |
08a02ecd | 4767 | { |
c6563a8c | 4768 | struct md_rdev *rdev; |
4c9309c0 | 4769 | unsigned long long new; |
6791875e | 4770 | int err; |
6791875e | 4771 | |
4c9309c0 AD |
4772 | err = kstrtoull(buf, 10, &new); |
4773 | if (err < 0) | |
4774 | return err; | |
4775 | if (new != (sector_t)new) | |
08a02ecd | 4776 | return -EINVAL; |
6791875e N |
4777 | err = mddev_lock(mddev); |
4778 | if (err) | |
4779 | return err; | |
4780 | err = -EBUSY; | |
4781 | if (mddev->pers) | |
4782 | goto unlock; | |
08a02ecd N |
4783 | mddev->reshape_position = new; |
4784 | mddev->delta_disks = 0; | |
2c810cdd | 4785 | mddev->reshape_backwards = 0; |
08a02ecd N |
4786 | mddev->new_level = mddev->level; |
4787 | mddev->new_layout = mddev->layout; | |
664e7c41 | 4788 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
c6563a8c N |
4789 | rdev_for_each(rdev, mddev) |
4790 | rdev->new_data_offset = rdev->data_offset; | |
6791875e N |
4791 | err = 0; |
4792 | unlock: | |
4793 | mddev_unlock(mddev); | |
4794 | return err ?: len; | |
08a02ecd N |
4795 | } |
4796 | ||
4797 | static struct md_sysfs_entry md_reshape_position = | |
4798 | __ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show, | |
4799 | reshape_position_store); | |
4800 | ||
2c810cdd N |
4801 | static ssize_t |
4802 | reshape_direction_show(struct mddev *mddev, char *page) | |
4803 | { | |
4804 | return sprintf(page, "%s\n", | |
4805 | mddev->reshape_backwards ? "backwards" : "forwards"); | |
4806 | } | |
4807 | ||
4808 | static ssize_t | |
4809 | reshape_direction_store(struct mddev *mddev, const char *buf, size_t len) | |
4810 | { | |
4811 | int backwards = 0; | |
6791875e N |
4812 | int err; |
4813 | ||
2c810cdd N |
4814 | if (cmd_match(buf, "forwards")) |
4815 | backwards = 0; | |
4816 | else if (cmd_match(buf, "backwards")) | |
4817 | backwards = 1; | |
4818 | else | |
4819 | return -EINVAL; | |
4820 | if (mddev->reshape_backwards == backwards) | |
4821 | return len; | |
4822 | ||
6791875e N |
4823 | err = mddev_lock(mddev); |
4824 | if (err) | |
4825 | return err; | |
2c810cdd N |
4826 | /* check if we are allowed to change */ |
4827 | if (mddev->delta_disks) | |
6791875e N |
4828 | err = -EBUSY; |
4829 | else if (mddev->persistent && | |
2c810cdd | 4830 | mddev->major_version == 0) |
6791875e N |
4831 | err = -EINVAL; |
4832 | else | |
4833 | mddev->reshape_backwards = backwards; | |
4834 | mddev_unlock(mddev); | |
4835 | return err ?: len; | |
2c810cdd N |
4836 | } |
4837 | ||
4838 | static struct md_sysfs_entry md_reshape_direction = | |
4839 | __ATTR(reshape_direction, S_IRUGO|S_IWUSR, reshape_direction_show, | |
4840 | reshape_direction_store); | |
4841 | ||
b522adcd | 4842 | static ssize_t |
fd01b88c | 4843 | array_size_show(struct mddev *mddev, char *page) |
b522adcd DW |
4844 | { |
4845 | if (mddev->external_size) | |
4846 | return sprintf(page, "%llu\n", | |
4847 | (unsigned long long)mddev->array_sectors/2); | |
4848 | else | |
4849 | return sprintf(page, "default\n"); | |
4850 | } | |
4851 | ||
4852 | static ssize_t | |
fd01b88c | 4853 | array_size_store(struct mddev *mddev, const char *buf, size_t len) |
b522adcd DW |
4854 | { |
4855 | sector_t sectors; | |
6791875e N |
4856 | int err; |
4857 | ||
4858 | err = mddev_lock(mddev); | |
4859 | if (err) | |
4860 | return err; | |
b522adcd | 4861 | |
ab5a98b1 GJ |
4862 | /* cluster raid doesn't support change array_sectors */ |
4863 | if (mddev_is_clustered(mddev)) | |
4864 | return -EINVAL; | |
4865 | ||
b522adcd DW |
4866 | if (strncmp(buf, "default", 7) == 0) { |
4867 | if (mddev->pers) | |
4868 | sectors = mddev->pers->size(mddev, 0, 0); | |
4869 | else | |
4870 | sectors = mddev->array_sectors; | |
4871 | ||
4872 | mddev->external_size = 0; | |
4873 | } else { | |
4874 | if (strict_blocks_to_sectors(buf, §ors) < 0) | |
6791875e N |
4875 | err = -EINVAL; |
4876 | else if (mddev->pers && mddev->pers->size(mddev, 0, 0) < sectors) | |
4877 | err = -E2BIG; | |
4878 | else | |
4879 | mddev->external_size = 1; | |
b522adcd DW |
4880 | } |
4881 | ||
6791875e N |
4882 | if (!err) { |
4883 | mddev->array_sectors = sectors; | |
4884 | if (mddev->pers) { | |
4885 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
4886 | revalidate_disk(mddev->gendisk); | |
4887 | } | |
cbe6ef1d | 4888 | } |
6791875e N |
4889 | mddev_unlock(mddev); |
4890 | return err ?: len; | |
b522adcd DW |
4891 | } |
4892 | ||
4893 | static struct md_sysfs_entry md_array_size = | |
4894 | __ATTR(array_size, S_IRUGO|S_IWUSR, array_size_show, | |
4895 | array_size_store); | |
e464eafd | 4896 | |
eae1701f N |
4897 | static struct attribute *md_default_attrs[] = { |
4898 | &md_level.attr, | |
d4dbd025 | 4899 | &md_layout.attr, |
eae1701f | 4900 | &md_raid_disks.attr, |
3b34380a | 4901 | &md_chunk_size.attr, |
a35b0d69 | 4902 | &md_size.attr, |
a94213b1 | 4903 | &md_resync_start.attr, |
8bb93aac | 4904 | &md_metadata.attr, |
6d7ff738 | 4905 | &md_new_device.attr, |
16f17b39 | 4906 | &md_safe_delay.attr, |
9e653b63 | 4907 | &md_array_state.attr, |
08a02ecd | 4908 | &md_reshape_position.attr, |
2c810cdd | 4909 | &md_reshape_direction.attr, |
b522adcd | 4910 | &md_array_size.attr, |
1e50915f | 4911 | &max_corr_read_errors.attr, |
411036fa N |
4912 | NULL, |
4913 | }; | |
4914 | ||
4915 | static struct attribute *md_redundancy_attrs[] = { | |
24dd469d | 4916 | &md_scan_mode.attr, |
c4a39551 | 4917 | &md_last_scan_mode.attr, |
9d88883e | 4918 | &md_mismatches.attr, |
88202a0c N |
4919 | &md_sync_min.attr, |
4920 | &md_sync_max.attr, | |
4921 | &md_sync_speed.attr, | |
90b08710 | 4922 | &md_sync_force_parallel.attr, |
88202a0c | 4923 | &md_sync_completed.attr, |
5e96ee65 | 4924 | &md_min_sync.attr, |
c6207277 | 4925 | &md_max_sync.attr, |
e464eafd N |
4926 | &md_suspend_lo.attr, |
4927 | &md_suspend_hi.attr, | |
9b1d1dac | 4928 | &md_bitmap.attr, |
d7f3d291 | 4929 | &md_degraded.attr, |
eae1701f N |
4930 | NULL, |
4931 | }; | |
411036fa N |
4932 | static struct attribute_group md_redundancy_group = { |
4933 | .name = NULL, | |
4934 | .attrs = md_redundancy_attrs, | |
4935 | }; | |
4936 | ||
eae1701f N |
4937 | static ssize_t |
4938 | md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
4939 | { | |
4940 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 4941 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 4942 | ssize_t rv; |
eae1701f N |
4943 | |
4944 | if (!entry->show) | |
4945 | return -EIO; | |
af8a2434 N |
4946 | spin_lock(&all_mddevs_lock); |
4947 | if (list_empty(&mddev->all_mddevs)) { | |
4948 | spin_unlock(&all_mddevs_lock); | |
4949 | return -EBUSY; | |
4950 | } | |
4951 | mddev_get(mddev); | |
4952 | spin_unlock(&all_mddevs_lock); | |
4953 | ||
b7b17c9b | 4954 | rv = entry->show(mddev, page); |
af8a2434 | 4955 | mddev_put(mddev); |
96de1e66 | 4956 | return rv; |
eae1701f N |
4957 | } |
4958 | ||
4959 | static ssize_t | |
4960 | md_attr_store(struct kobject *kobj, struct attribute *attr, | |
4961 | const char *page, size_t length) | |
4962 | { | |
4963 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 4964 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 4965 | ssize_t rv; |
eae1701f N |
4966 | |
4967 | if (!entry->store) | |
4968 | return -EIO; | |
67463acb N |
4969 | if (!capable(CAP_SYS_ADMIN)) |
4970 | return -EACCES; | |
af8a2434 N |
4971 | spin_lock(&all_mddevs_lock); |
4972 | if (list_empty(&mddev->all_mddevs)) { | |
4973 | spin_unlock(&all_mddevs_lock); | |
4974 | return -EBUSY; | |
4975 | } | |
4976 | mddev_get(mddev); | |
4977 | spin_unlock(&all_mddevs_lock); | |
6791875e | 4978 | rv = entry->store(mddev, page, length); |
af8a2434 | 4979 | mddev_put(mddev); |
96de1e66 | 4980 | return rv; |
eae1701f N |
4981 | } |
4982 | ||
4983 | static void md_free(struct kobject *ko) | |
4984 | { | |
fd01b88c | 4985 | struct mddev *mddev = container_of(ko, struct mddev, kobj); |
a21d1504 N |
4986 | |
4987 | if (mddev->sysfs_state) | |
4988 | sysfs_put(mddev->sysfs_state); | |
4989 | ||
6cd18e71 N |
4990 | if (mddev->queue) |
4991 | blk_cleanup_queue(mddev->queue); | |
a21d1504 N |
4992 | if (mddev->gendisk) { |
4993 | del_gendisk(mddev->gendisk); | |
4994 | put_disk(mddev->gendisk); | |
4995 | } | |
a21d1504 | 4996 | |
eae1701f N |
4997 | kfree(mddev); |
4998 | } | |
4999 | ||
52cf25d0 | 5000 | static const struct sysfs_ops md_sysfs_ops = { |
eae1701f N |
5001 | .show = md_attr_show, |
5002 | .store = md_attr_store, | |
5003 | }; | |
5004 | static struct kobj_type md_ktype = { | |
5005 | .release = md_free, | |
5006 | .sysfs_ops = &md_sysfs_ops, | |
5007 | .default_attrs = md_default_attrs, | |
5008 | }; | |
5009 | ||
1da177e4 LT |
5010 | int mdp_major = 0; |
5011 | ||
5fd3a17e DW |
5012 | static void mddev_delayed_delete(struct work_struct *ws) |
5013 | { | |
fd01b88c | 5014 | struct mddev *mddev = container_of(ws, struct mddev, del_work); |
5fd3a17e | 5015 | |
43a70507 | 5016 | sysfs_remove_group(&mddev->kobj, &md_bitmap_group); |
5fd3a17e DW |
5017 | kobject_del(&mddev->kobj); |
5018 | kobject_put(&mddev->kobj); | |
5019 | } | |
5020 | ||
efeb53c0 | 5021 | static int md_alloc(dev_t dev, char *name) |
1da177e4 | 5022 | { |
48c9c27b | 5023 | static DEFINE_MUTEX(disks_mutex); |
fd01b88c | 5024 | struct mddev *mddev = mddev_find(dev); |
1da177e4 | 5025 | struct gendisk *disk; |
efeb53c0 N |
5026 | int partitioned; |
5027 | int shift; | |
5028 | int unit; | |
3830c62f | 5029 | int error; |
1da177e4 LT |
5030 | |
5031 | if (!mddev) | |
efeb53c0 N |
5032 | return -ENODEV; |
5033 | ||
5034 | partitioned = (MAJOR(mddev->unit) != MD_MAJOR); | |
5035 | shift = partitioned ? MdpMinorShift : 0; | |
5036 | unit = MINOR(mddev->unit) >> shift; | |
1da177e4 | 5037 | |
e804ac78 TH |
5038 | /* wait for any previous instance of this device to be |
5039 | * completely removed (mddev_delayed_delete). | |
d3374825 | 5040 | */ |
e804ac78 | 5041 | flush_workqueue(md_misc_wq); |
d3374825 | 5042 | |
48c9c27b | 5043 | mutex_lock(&disks_mutex); |
0909dc44 N |
5044 | error = -EEXIST; |
5045 | if (mddev->gendisk) | |
5046 | goto abort; | |
efeb53c0 N |
5047 | |
5048 | if (name) { | |
5049 | /* Need to ensure that 'name' is not a duplicate. | |
5050 | */ | |
fd01b88c | 5051 | struct mddev *mddev2; |
efeb53c0 N |
5052 | spin_lock(&all_mddevs_lock); |
5053 | ||
5054 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) | |
5055 | if (mddev2->gendisk && | |
5056 | strcmp(mddev2->gendisk->disk_name, name) == 0) { | |
5057 | spin_unlock(&all_mddevs_lock); | |
0909dc44 | 5058 | goto abort; |
efeb53c0 N |
5059 | } |
5060 | spin_unlock(&all_mddevs_lock); | |
1da177e4 | 5061 | } |
8b765398 | 5062 | |
0909dc44 | 5063 | error = -ENOMEM; |
8b765398 | 5064 | mddev->queue = blk_alloc_queue(GFP_KERNEL); |
0909dc44 N |
5065 | if (!mddev->queue) |
5066 | goto abort; | |
409c57f3 N |
5067 | mddev->queue->queuedata = mddev; |
5068 | ||
409c57f3 | 5069 | blk_queue_make_request(mddev->queue, md_make_request); |
b1bd055d | 5070 | blk_set_stacking_limits(&mddev->queue->limits); |
8b765398 | 5071 | |
1da177e4 LT |
5072 | disk = alloc_disk(1 << shift); |
5073 | if (!disk) { | |
8b765398 N |
5074 | blk_cleanup_queue(mddev->queue); |
5075 | mddev->queue = NULL; | |
0909dc44 | 5076 | goto abort; |
1da177e4 | 5077 | } |
efeb53c0 | 5078 | disk->major = MAJOR(mddev->unit); |
1da177e4 | 5079 | disk->first_minor = unit << shift; |
efeb53c0 N |
5080 | if (name) |
5081 | strcpy(disk->disk_name, name); | |
5082 | else if (partitioned) | |
1da177e4 | 5083 | sprintf(disk->disk_name, "md_d%d", unit); |
ce7b0f46 | 5084 | else |
1da177e4 | 5085 | sprintf(disk->disk_name, "md%d", unit); |
1da177e4 LT |
5086 | disk->fops = &md_fops; |
5087 | disk->private_data = mddev; | |
5088 | disk->queue = mddev->queue; | |
56883a7e | 5089 | blk_queue_write_cache(mddev->queue, true, true); |
92850bbd | 5090 | /* Allow extended partitions. This makes the |
d3374825 | 5091 | * 'mdp' device redundant, but we can't really |
92850bbd N |
5092 | * remove it now. |
5093 | */ | |
5094 | disk->flags |= GENHD_FL_EXT_DEVT; | |
1da177e4 | 5095 | mddev->gendisk = disk; |
b0140891 N |
5096 | /* As soon as we call add_disk(), another thread could get |
5097 | * through to md_open, so make sure it doesn't get too far | |
5098 | */ | |
5099 | mutex_lock(&mddev->open_mutex); | |
5100 | add_disk(disk); | |
5101 | ||
ed9e1982 TH |
5102 | error = kobject_init_and_add(&mddev->kobj, &md_ktype, |
5103 | &disk_to_dev(disk)->kobj, "%s", "md"); | |
0909dc44 N |
5104 | if (error) { |
5105 | /* This isn't possible, but as kobject_init_and_add is marked | |
5106 | * __must_check, we must do something with the result | |
5107 | */ | |
9d48739e N |
5108 | pr_debug("md: cannot register %s/md - name in use\n", |
5109 | disk->disk_name); | |
0909dc44 N |
5110 | error = 0; |
5111 | } | |
00bcb4ac N |
5112 | if (mddev->kobj.sd && |
5113 | sysfs_create_group(&mddev->kobj, &md_bitmap_group)) | |
9d48739e | 5114 | pr_debug("pointless warning\n"); |
b0140891 | 5115 | mutex_unlock(&mddev->open_mutex); |
0909dc44 N |
5116 | abort: |
5117 | mutex_unlock(&disks_mutex); | |
00bcb4ac | 5118 | if (!error && mddev->kobj.sd) { |
3830c62f | 5119 | kobject_uevent(&mddev->kobj, KOBJ_ADD); |
00bcb4ac | 5120 | mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state"); |
b62b7590 | 5121 | } |
d3374825 | 5122 | mddev_put(mddev); |
0909dc44 | 5123 | return error; |
efeb53c0 N |
5124 | } |
5125 | ||
5126 | static struct kobject *md_probe(dev_t dev, int *part, void *data) | |
5127 | { | |
5128 | md_alloc(dev, NULL); | |
1da177e4 LT |
5129 | return NULL; |
5130 | } | |
5131 | ||
efeb53c0 N |
5132 | static int add_named_array(const char *val, struct kernel_param *kp) |
5133 | { | |
5134 | /* val must be "md_*" where * is not all digits. | |
5135 | * We allocate an array with a large free minor number, and | |
5136 | * set the name to val. val must not already be an active name. | |
5137 | */ | |
5138 | int len = strlen(val); | |
5139 | char buf[DISK_NAME_LEN]; | |
5140 | ||
5141 | while (len && val[len-1] == '\n') | |
5142 | len--; | |
5143 | if (len >= DISK_NAME_LEN) | |
5144 | return -E2BIG; | |
5145 | strlcpy(buf, val, len+1); | |
5146 | if (strncmp(buf, "md_", 3) != 0) | |
5147 | return -EINVAL; | |
5148 | return md_alloc(0, buf); | |
5149 | } | |
5150 | ||
1da177e4 LT |
5151 | static void md_safemode_timeout(unsigned long data) |
5152 | { | |
fd01b88c | 5153 | struct mddev *mddev = (struct mddev *) data; |
1da177e4 | 5154 | |
0fd62b86 NB |
5155 | if (!atomic_read(&mddev->writes_pending)) { |
5156 | mddev->safemode = 1; | |
5157 | if (mddev->external) | |
00bcb4ac | 5158 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 5159 | } |
1da177e4 LT |
5160 | md_wakeup_thread(mddev->thread); |
5161 | } | |
5162 | ||
6ff8d8ec | 5163 | static int start_dirty_degraded; |
1da177e4 | 5164 | |
fd01b88c | 5165 | int md_run(struct mddev *mddev) |
1da177e4 | 5166 | { |
2604b703 | 5167 | int err; |
3cb03002 | 5168 | struct md_rdev *rdev; |
84fc4b56 | 5169 | struct md_personality *pers; |
1da177e4 | 5170 | |
a757e64c N |
5171 | if (list_empty(&mddev->disks)) |
5172 | /* cannot run an array with no devices.. */ | |
1da177e4 | 5173 | return -EINVAL; |
1da177e4 LT |
5174 | |
5175 | if (mddev->pers) | |
5176 | return -EBUSY; | |
bb4f1e9d N |
5177 | /* Cannot run until previous stop completes properly */ |
5178 | if (mddev->sysfs_active) | |
5179 | return -EBUSY; | |
b6eb127d | 5180 | |
1da177e4 LT |
5181 | /* |
5182 | * Analyze all RAID superblock(s) | |
5183 | */ | |
1ec4a939 N |
5184 | if (!mddev->raid_disks) { |
5185 | if (!mddev->persistent) | |
5186 | return -EINVAL; | |
a757e64c | 5187 | analyze_sbs(mddev); |
1ec4a939 | 5188 | } |
1da177e4 | 5189 | |
d9d166c2 N |
5190 | if (mddev->level != LEVEL_NONE) |
5191 | request_module("md-level-%d", mddev->level); | |
5192 | else if (mddev->clevel[0]) | |
5193 | request_module("md-%s", mddev->clevel); | |
1da177e4 LT |
5194 | |
5195 | /* | |
5196 | * Drop all container device buffers, from now on | |
5197 | * the only valid external interface is through the md | |
5198 | * device. | |
1da177e4 | 5199 | */ |
dafb20fa | 5200 | rdev_for_each(rdev, mddev) { |
b2d444d7 | 5201 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
5202 | continue; |
5203 | sync_blockdev(rdev->bdev); | |
f98393a6 | 5204 | invalidate_bdev(rdev->bdev); |
f0d76d70 N |
5205 | |
5206 | /* perform some consistency tests on the device. | |
5207 | * We don't want the data to overlap the metadata, | |
58c0fed4 | 5208 | * Internal Bitmap issues have been handled elsewhere. |
f0d76d70 | 5209 | */ |
a6ff7e08 JB |
5210 | if (rdev->meta_bdev) { |
5211 | /* Nothing to check */; | |
5212 | } else if (rdev->data_offset < rdev->sb_start) { | |
58c0fed4 AN |
5213 | if (mddev->dev_sectors && |
5214 | rdev->data_offset + mddev->dev_sectors | |
0f420358 | 5215 | > rdev->sb_start) { |
9d48739e N |
5216 | pr_warn("md: %s: data overlaps metadata\n", |
5217 | mdname(mddev)); | |
f0d76d70 N |
5218 | return -EINVAL; |
5219 | } | |
5220 | } else { | |
0f420358 | 5221 | if (rdev->sb_start + rdev->sb_size/512 |
f0d76d70 | 5222 | > rdev->data_offset) { |
9d48739e N |
5223 | pr_warn("md: %s: metadata overlaps data\n", |
5224 | mdname(mddev)); | |
f0d76d70 N |
5225 | return -EINVAL; |
5226 | } | |
5227 | } | |
00bcb4ac | 5228 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
5229 | } |
5230 | ||
a167f663 | 5231 | if (mddev->bio_set == NULL) |
395c72a7 | 5232 | mddev->bio_set = bioset_create(BIO_POOL_SIZE, 0); |
a167f663 | 5233 | |
1da177e4 | 5234 | spin_lock(&pers_lock); |
d9d166c2 | 5235 | pers = find_pers(mddev->level, mddev->clevel); |
2604b703 | 5236 | if (!pers || !try_module_get(pers->owner)) { |
1da177e4 | 5237 | spin_unlock(&pers_lock); |
d9d166c2 | 5238 | if (mddev->level != LEVEL_NONE) |
9d48739e N |
5239 | pr_warn("md: personality for level %d is not loaded!\n", |
5240 | mddev->level); | |
d9d166c2 | 5241 | else |
9d48739e N |
5242 | pr_warn("md: personality for level %s is not loaded!\n", |
5243 | mddev->clevel); | |
1da177e4 LT |
5244 | return -EINVAL; |
5245 | } | |
1da177e4 | 5246 | spin_unlock(&pers_lock); |
34817e8c N |
5247 | if (mddev->level != pers->level) { |
5248 | mddev->level = pers->level; | |
5249 | mddev->new_level = pers->level; | |
5250 | } | |
d9d166c2 | 5251 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
1da177e4 | 5252 | |
f6705578 | 5253 | if (mddev->reshape_position != MaxSector && |
63c70c4f | 5254 | pers->start_reshape == NULL) { |
f6705578 | 5255 | /* This personality cannot handle reshaping... */ |
f6705578 N |
5256 | module_put(pers->owner); |
5257 | return -EINVAL; | |
5258 | } | |
5259 | ||
7dd5e7c3 N |
5260 | if (pers->sync_request) { |
5261 | /* Warn if this is a potentially silly | |
5262 | * configuration. | |
5263 | */ | |
5264 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 5265 | struct md_rdev *rdev2; |
7dd5e7c3 | 5266 | int warned = 0; |
159ec1fc | 5267 | |
dafb20fa N |
5268 | rdev_for_each(rdev, mddev) |
5269 | rdev_for_each(rdev2, mddev) { | |
7dd5e7c3 N |
5270 | if (rdev < rdev2 && |
5271 | rdev->bdev->bd_contains == | |
5272 | rdev2->bdev->bd_contains) { | |
9d48739e N |
5273 | pr_warn("%s: WARNING: %s appears to be on the same physical disk as %s.\n", |
5274 | mdname(mddev), | |
5275 | bdevname(rdev->bdev,b), | |
5276 | bdevname(rdev2->bdev,b2)); | |
7dd5e7c3 N |
5277 | warned = 1; |
5278 | } | |
5279 | } | |
159ec1fc | 5280 | |
7dd5e7c3 | 5281 | if (warned) |
9d48739e | 5282 | pr_warn("True protection against single-disk failure might be compromised.\n"); |
7dd5e7c3 N |
5283 | } |
5284 | ||
657390d2 | 5285 | mddev->recovery = 0; |
58c0fed4 AN |
5286 | /* may be over-ridden by personality */ |
5287 | mddev->resync_max_sectors = mddev->dev_sectors; | |
5288 | ||
6ff8d8ec | 5289 | mddev->ok_start_degraded = start_dirty_degraded; |
1da177e4 | 5290 | |
0f9552b5 | 5291 | if (start_readonly && mddev->ro == 0) |
f91de92e N |
5292 | mddev->ro = 2; /* read-only, but switch on first write */ |
5293 | ||
36d091f4 | 5294 | err = pers->run(mddev); |
13e53df3 | 5295 | if (err) |
9d48739e | 5296 | pr_warn("md: pers->run() failed ...\n"); |
36d091f4 | 5297 | else if (pers->size(mddev, 0, 0) < mddev->array_sectors) { |
9d48739e N |
5298 | WARN_ONCE(!mddev->external_size, |
5299 | "%s: default size too small, but 'external_size' not in effect?\n", | |
5300 | __func__); | |
5301 | pr_warn("md: invalid array_size %llu > default size %llu\n", | |
5302 | (unsigned long long)mddev->array_sectors / 2, | |
5303 | (unsigned long long)pers->size(mddev, 0, 0) / 2); | |
b522adcd | 5304 | err = -EINVAL; |
b522adcd | 5305 | } |
36d091f4 | 5306 | if (err == 0 && pers->sync_request && |
ef99bf48 | 5307 | (mddev->bitmap_info.file || mddev->bitmap_info.offset)) { |
f9209a32 GR |
5308 | struct bitmap *bitmap; |
5309 | ||
5310 | bitmap = bitmap_create(mddev, -1); | |
5311 | if (IS_ERR(bitmap)) { | |
5312 | err = PTR_ERR(bitmap); | |
9d48739e N |
5313 | pr_warn("%s: failed to create bitmap (%d)\n", |
5314 | mdname(mddev), err); | |
f9209a32 GR |
5315 | } else |
5316 | mddev->bitmap = bitmap; | |
5317 | ||
b15c2e57 | 5318 | } |
1da177e4 | 5319 | if (err) { |
5aa61f42 | 5320 | mddev_detach(mddev); |
0c35bd47 N |
5321 | if (mddev->private) |
5322 | pers->free(mddev, mddev->private); | |
bd691922 | 5323 | mddev->private = NULL; |
36d091f4 | 5324 | module_put(pers->owner); |
32a7627c N |
5325 | bitmap_destroy(mddev); |
5326 | return err; | |
1da177e4 | 5327 | } |
5c675f83 | 5328 | if (mddev->queue) { |
bb086a89 SL |
5329 | bool nonrot = true; |
5330 | ||
5331 | rdev_for_each(rdev, mddev) { | |
5332 | if (rdev->raid_disk >= 0 && | |
5333 | !blk_queue_nonrot(bdev_get_queue(rdev->bdev))) { | |
5334 | nonrot = false; | |
5335 | break; | |
5336 | } | |
5337 | } | |
5338 | if (mddev->degraded) | |
5339 | nonrot = false; | |
5340 | if (nonrot) | |
5341 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, mddev->queue); | |
5342 | else | |
5343 | queue_flag_clear_unlocked(QUEUE_FLAG_NONROT, mddev->queue); | |
5c675f83 N |
5344 | mddev->queue->backing_dev_info.congested_data = mddev; |
5345 | mddev->queue->backing_dev_info.congested_fn = md_congested; | |
5346 | } | |
36d091f4 | 5347 | if (pers->sync_request) { |
00bcb4ac N |
5348 | if (mddev->kobj.sd && |
5349 | sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
5350 | pr_warn("md: cannot register extra attributes for %s\n", |
5351 | mdname(mddev)); | |
00bcb4ac | 5352 | mddev->sysfs_action = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_action"); |
5e55e2f5 | 5353 | } else if (mddev->ro == 2) /* auto-readonly not meaningful */ |
fd9d49ca N |
5354 | mddev->ro = 0; |
5355 | ||
f72ffdd6 | 5356 | atomic_set(&mddev->writes_pending,0); |
1e50915f RB |
5357 | atomic_set(&mddev->max_corr_read_errors, |
5358 | MD_DEFAULT_MAX_CORRECTED_READ_ERRORS); | |
1da177e4 | 5359 | mddev->safemode = 0; |
28c1b9fd GR |
5360 | if (mddev_is_clustered(mddev)) |
5361 | mddev->safemode_delay = 0; | |
5362 | else | |
5363 | mddev->safemode_delay = (200 * HZ)/1000 +1; /* 200 msec delay */ | |
1da177e4 | 5364 | mddev->in_sync = 1; |
0ca69886 | 5365 | smp_wmb(); |
36d091f4 N |
5366 | spin_lock(&mddev->lock); |
5367 | mddev->pers = pers; | |
36d091f4 | 5368 | spin_unlock(&mddev->lock); |
dafb20fa | 5369 | rdev_for_each(rdev, mddev) |
36fad858 NK |
5370 | if (rdev->raid_disk >= 0) |
5371 | if (sysfs_link_rdev(mddev, rdev)) | |
00bcb4ac | 5372 | /* failure here is OK */; |
f72ffdd6 | 5373 | |
a4a3d26d N |
5374 | if (mddev->degraded && !mddev->ro) |
5375 | /* This ensures that recovering status is reported immediately | |
5376 | * via sysfs - until a lack of spares is confirmed. | |
5377 | */ | |
5378 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
1da177e4 | 5379 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f72ffdd6 | 5380 | |
2953079c | 5381 | if (mddev->sb_flags) |
850b2b42 | 5382 | md_update_sb(mddev, 0); |
1da177e4 | 5383 | |
d7603b7e | 5384 | md_new_event(mddev); |
00bcb4ac N |
5385 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
5386 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
a99ac971 | 5387 | sysfs_notify(&mddev->kobj, NULL, "degraded"); |
1da177e4 LT |
5388 | return 0; |
5389 | } | |
390ee602 | 5390 | EXPORT_SYMBOL_GPL(md_run); |
1da177e4 | 5391 | |
fd01b88c | 5392 | static int do_md_run(struct mddev *mddev) |
fe60b014 N |
5393 | { |
5394 | int err; | |
5395 | ||
5396 | err = md_run(mddev); | |
5397 | if (err) | |
5398 | goto out; | |
69e51b44 N |
5399 | err = bitmap_load(mddev); |
5400 | if (err) { | |
5401 | bitmap_destroy(mddev); | |
5402 | goto out; | |
5403 | } | |
0fd018af | 5404 | |
28c1b9fd GR |
5405 | if (mddev_is_clustered(mddev)) |
5406 | md_allow_write(mddev); | |
5407 | ||
0fd018af JB |
5408 | md_wakeup_thread(mddev->thread); |
5409 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
5410 | ||
fe60b014 N |
5411 | set_capacity(mddev->gendisk, mddev->array_sectors); |
5412 | revalidate_disk(mddev->gendisk); | |
f0b4f7e2 | 5413 | mddev->changed = 1; |
fe60b014 N |
5414 | kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); |
5415 | out: | |
5416 | return err; | |
5417 | } | |
5418 | ||
fd01b88c | 5419 | static int restart_array(struct mddev *mddev) |
1da177e4 LT |
5420 | { |
5421 | struct gendisk *disk = mddev->gendisk; | |
1da177e4 | 5422 | |
80fab1d7 | 5423 | /* Complain if it has no devices */ |
1da177e4 | 5424 | if (list_empty(&mddev->disks)) |
80fab1d7 AN |
5425 | return -ENXIO; |
5426 | if (!mddev->pers) | |
5427 | return -EINVAL; | |
5428 | if (!mddev->ro) | |
5429 | return -EBUSY; | |
339421de SL |
5430 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) { |
5431 | struct md_rdev *rdev; | |
5432 | bool has_journal = false; | |
5433 | ||
5434 | rcu_read_lock(); | |
5435 | rdev_for_each_rcu(rdev, mddev) { | |
5436 | if (test_bit(Journal, &rdev->flags) && | |
5437 | !test_bit(Faulty, &rdev->flags)) { | |
5438 | has_journal = true; | |
5439 | break; | |
5440 | } | |
5441 | } | |
5442 | rcu_read_unlock(); | |
5443 | ||
5444 | /* Don't restart rw with journal missing/faulty */ | |
5445 | if (!has_journal) | |
5446 | return -EINVAL; | |
5447 | } | |
5448 | ||
80fab1d7 AN |
5449 | mddev->safemode = 0; |
5450 | mddev->ro = 0; | |
5451 | set_disk_ro(disk, 0); | |
9d48739e | 5452 | pr_debug("md: %s switched to read-write mode.\n", mdname(mddev)); |
80fab1d7 AN |
5453 | /* Kick recovery or resync if necessary */ |
5454 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
5455 | md_wakeup_thread(mddev->thread); | |
5456 | md_wakeup_thread(mddev->sync_thread); | |
00bcb4ac | 5457 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
80fab1d7 | 5458 | return 0; |
1da177e4 LT |
5459 | } |
5460 | ||
fd01b88c | 5461 | static void md_clean(struct mddev *mddev) |
6177b472 N |
5462 | { |
5463 | mddev->array_sectors = 0; | |
5464 | mddev->external_size = 0; | |
5465 | mddev->dev_sectors = 0; | |
5466 | mddev->raid_disks = 0; | |
5467 | mddev->recovery_cp = 0; | |
5468 | mddev->resync_min = 0; | |
5469 | mddev->resync_max = MaxSector; | |
5470 | mddev->reshape_position = MaxSector; | |
5471 | mddev->external = 0; | |
5472 | mddev->persistent = 0; | |
5473 | mddev->level = LEVEL_NONE; | |
5474 | mddev->clevel[0] = 0; | |
5475 | mddev->flags = 0; | |
2953079c | 5476 | mddev->sb_flags = 0; |
6177b472 N |
5477 | mddev->ro = 0; |
5478 | mddev->metadata_type[0] = 0; | |
5479 | mddev->chunk_sectors = 0; | |
5480 | mddev->ctime = mddev->utime = 0; | |
5481 | mddev->layout = 0; | |
5482 | mddev->max_disks = 0; | |
5483 | mddev->events = 0; | |
a8707c08 | 5484 | mddev->can_decrease_events = 0; |
6177b472 | 5485 | mddev->delta_disks = 0; |
2c810cdd | 5486 | mddev->reshape_backwards = 0; |
6177b472 N |
5487 | mddev->new_level = LEVEL_NONE; |
5488 | mddev->new_layout = 0; | |
5489 | mddev->new_chunk_sectors = 0; | |
5490 | mddev->curr_resync = 0; | |
7f7583d4 | 5491 | atomic64_set(&mddev->resync_mismatches, 0); |
6177b472 N |
5492 | mddev->suspend_lo = mddev->suspend_hi = 0; |
5493 | mddev->sync_speed_min = mddev->sync_speed_max = 0; | |
5494 | mddev->recovery = 0; | |
5495 | mddev->in_sync = 0; | |
f0b4f7e2 | 5496 | mddev->changed = 0; |
6177b472 | 5497 | mddev->degraded = 0; |
6177b472 | 5498 | mddev->safemode = 0; |
bd691922 | 5499 | mddev->private = NULL; |
c20c33f0 | 5500 | mddev->cluster_info = NULL; |
6177b472 N |
5501 | mddev->bitmap_info.offset = 0; |
5502 | mddev->bitmap_info.default_offset = 0; | |
6409bb05 | 5503 | mddev->bitmap_info.default_space = 0; |
6177b472 N |
5504 | mddev->bitmap_info.chunksize = 0; |
5505 | mddev->bitmap_info.daemon_sleep = 0; | |
5506 | mddev->bitmap_info.max_write_behind = 0; | |
c20c33f0 | 5507 | mddev->bitmap_info.nodes = 0; |
6177b472 N |
5508 | } |
5509 | ||
fd01b88c | 5510 | static void __md_stop_writes(struct mddev *mddev) |
a047e125 | 5511 | { |
6b6204ee | 5512 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
f851b60d | 5513 | flush_workqueue(md_misc_wq); |
a047e125 | 5514 | if (mddev->sync_thread) { |
a047e125 | 5515 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
a91d5ac0 | 5516 | md_reap_sync_thread(mddev); |
a047e125 N |
5517 | } |
5518 | ||
5519 | del_timer_sync(&mddev->safemode_timer); | |
5520 | ||
034e33f5 SL |
5521 | if (mddev->pers && mddev->pers->quiesce) { |
5522 | mddev->pers->quiesce(mddev, 1); | |
5523 | mddev->pers->quiesce(mddev, 0); | |
5524 | } | |
a047e125 | 5525 | bitmap_flush(mddev); |
a047e125 | 5526 | |
b6d428c6 | 5527 | if (mddev->ro == 0 && |
28c1b9fd | 5528 | ((!mddev->in_sync && !mddev_is_clustered(mddev)) || |
2953079c | 5529 | mddev->sb_flags)) { |
a047e125 | 5530 | /* mark array as shutdown cleanly */ |
28c1b9fd GR |
5531 | if (!mddev_is_clustered(mddev)) |
5532 | mddev->in_sync = 1; | |
a047e125 N |
5533 | md_update_sb(mddev, 1); |
5534 | } | |
5535 | } | |
defad61a | 5536 | |
fd01b88c | 5537 | void md_stop_writes(struct mddev *mddev) |
defad61a | 5538 | { |
29f097c4 | 5539 | mddev_lock_nointr(mddev); |
defad61a N |
5540 | __md_stop_writes(mddev); |
5541 | mddev_unlock(mddev); | |
5542 | } | |
390ee602 | 5543 | EXPORT_SYMBOL_GPL(md_stop_writes); |
a047e125 | 5544 | |
5aa61f42 N |
5545 | static void mddev_detach(struct mddev *mddev) |
5546 | { | |
5547 | struct bitmap *bitmap = mddev->bitmap; | |
5548 | /* wait for behind writes to complete */ | |
5549 | if (bitmap && atomic_read(&bitmap->behind_writes) > 0) { | |
9d48739e N |
5550 | pr_debug("md:%s: behind writes in progress - waiting to stop.\n", |
5551 | mdname(mddev)); | |
5aa61f42 N |
5552 | /* need to kick something here to make sure I/O goes? */ |
5553 | wait_event(bitmap->behind_wait, | |
5554 | atomic_read(&bitmap->behind_writes) == 0); | |
5555 | } | |
36d091f4 | 5556 | if (mddev->pers && mddev->pers->quiesce) { |
5aa61f42 N |
5557 | mddev->pers->quiesce(mddev, 1); |
5558 | mddev->pers->quiesce(mddev, 0); | |
5559 | } | |
5560 | md_unregister_thread(&mddev->thread); | |
5561 | if (mddev->queue) | |
5562 | blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ | |
5563 | } | |
5564 | ||
5eff3c43 | 5565 | static void __md_stop(struct mddev *mddev) |
6177b472 | 5566 | { |
36d091f4 | 5567 | struct md_personality *pers = mddev->pers; |
5aa61f42 | 5568 | mddev_detach(mddev); |
ee5d004f N |
5569 | /* Ensure ->event_work is done */ |
5570 | flush_workqueue(md_misc_wq); | |
36d091f4 | 5571 | spin_lock(&mddev->lock); |
6177b472 | 5572 | mddev->pers = NULL; |
36d091f4 N |
5573 | spin_unlock(&mddev->lock); |
5574 | pers->free(mddev, mddev->private); | |
bd691922 | 5575 | mddev->private = NULL; |
36d091f4 N |
5576 | if (pers->sync_request && mddev->to_remove == NULL) |
5577 | mddev->to_remove = &md_redundancy_group; | |
5578 | module_put(pers->owner); | |
cca9cf90 | 5579 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
6177b472 | 5580 | } |
5eff3c43 N |
5581 | |
5582 | void md_stop(struct mddev *mddev) | |
5583 | { | |
5584 | /* stop the array and free an attached data structures. | |
5585 | * This is called from dm-raid | |
5586 | */ | |
5587 | __md_stop(mddev); | |
5588 | bitmap_destroy(mddev); | |
5589 | if (mddev->bio_set) | |
5590 | bioset_free(mddev->bio_set); | |
5591 | } | |
5592 | ||
390ee602 | 5593 | EXPORT_SYMBOL_GPL(md_stop); |
6177b472 | 5594 | |
a05b7ea0 | 5595 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) |
a4bd82d0 N |
5596 | { |
5597 | int err = 0; | |
30b8feb7 N |
5598 | int did_freeze = 0; |
5599 | ||
5600 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
5601 | did_freeze = 1; | |
5602 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
5603 | md_wakeup_thread(mddev->thread); | |
5604 | } | |
f851b60d | 5605 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 5606 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 5607 | if (mddev->sync_thread) |
30b8feb7 N |
5608 | /* Thread might be blocked waiting for metadata update |
5609 | * which will now never happen */ | |
5610 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 5611 | |
2953079c | 5612 | if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
88724bfa | 5613 | return -EBUSY; |
30b8feb7 | 5614 | mddev_unlock(mddev); |
f851b60d N |
5615 | wait_event(resync_wait, !test_bit(MD_RECOVERY_RUNNING, |
5616 | &mddev->recovery)); | |
88724bfa | 5617 | wait_event(mddev->sb_wait, |
2953079c | 5618 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
30b8feb7 N |
5619 | mddev_lock_nointr(mddev); |
5620 | ||
a4bd82d0 | 5621 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 5622 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 | 5623 | mddev->sync_thread || |
af8d8e6f | 5624 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 5625 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
30b8feb7 N |
5626 | if (did_freeze) { |
5627 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 5628 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
5629 | md_wakeup_thread(mddev->thread); |
5630 | } | |
a4bd82d0 N |
5631 | err = -EBUSY; |
5632 | goto out; | |
5633 | } | |
5634 | if (mddev->pers) { | |
defad61a | 5635 | __md_stop_writes(mddev); |
a4bd82d0 N |
5636 | |
5637 | err = -ENXIO; | |
5638 | if (mddev->ro==1) | |
5639 | goto out; | |
5640 | mddev->ro = 1; | |
5641 | set_disk_ro(mddev->gendisk, 1); | |
5642 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d N |
5643 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
5644 | md_wakeup_thread(mddev->thread); | |
00bcb4ac | 5645 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
30b8feb7 | 5646 | err = 0; |
a4bd82d0 N |
5647 | } |
5648 | out: | |
5649 | mutex_unlock(&mddev->open_mutex); | |
5650 | return err; | |
5651 | } | |
5652 | ||
9e653b63 N |
5653 | /* mode: |
5654 | * 0 - completely stop and dis-assemble array | |
9e653b63 N |
5655 | * 2 - stop but do not disassemble array |
5656 | */ | |
f72ffdd6 | 5657 | static int do_md_stop(struct mddev *mddev, int mode, |
a05b7ea0 | 5658 | struct block_device *bdev) |
1da177e4 | 5659 | { |
1da177e4 | 5660 | struct gendisk *disk = mddev->gendisk; |
3cb03002 | 5661 | struct md_rdev *rdev; |
30b8feb7 N |
5662 | int did_freeze = 0; |
5663 | ||
5664 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
5665 | did_freeze = 1; | |
5666 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
5667 | md_wakeup_thread(mddev->thread); | |
5668 | } | |
f851b60d | 5669 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 5670 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 5671 | if (mddev->sync_thread) |
30b8feb7 N |
5672 | /* Thread might be blocked waiting for metadata update |
5673 | * which will now never happen */ | |
5674 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 5675 | |
30b8feb7 | 5676 | mddev_unlock(mddev); |
f851b60d N |
5677 | wait_event(resync_wait, (mddev->sync_thread == NULL && |
5678 | !test_bit(MD_RECOVERY_RUNNING, | |
5679 | &mddev->recovery))); | |
30b8feb7 | 5680 | mddev_lock_nointr(mddev); |
1da177e4 | 5681 | |
c8c00a69 | 5682 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 5683 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 N |
5684 | mddev->sysfs_active || |
5685 | mddev->sync_thread || | |
af8d8e6f | 5686 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 5687 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
6e17b027 | 5688 | mutex_unlock(&mddev->open_mutex); |
30b8feb7 N |
5689 | if (did_freeze) { |
5690 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 5691 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
5692 | md_wakeup_thread(mddev->thread); |
5693 | } | |
260fa034 N |
5694 | return -EBUSY; |
5695 | } | |
6e17b027 | 5696 | if (mddev->pers) { |
a4bd82d0 N |
5697 | if (mddev->ro) |
5698 | set_disk_ro(disk, 0); | |
409c57f3 | 5699 | |
defad61a | 5700 | __md_stop_writes(mddev); |
5eff3c43 | 5701 | __md_stop(mddev); |
a4bd82d0 | 5702 | mddev->queue->backing_dev_info.congested_fn = NULL; |
6177b472 | 5703 | |
a4bd82d0 | 5704 | /* tell userspace to handle 'inactive' */ |
00bcb4ac | 5705 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0d4ca600 | 5706 | |
dafb20fa | 5707 | rdev_for_each(rdev, mddev) |
36fad858 NK |
5708 | if (rdev->raid_disk >= 0) |
5709 | sysfs_unlink_rdev(mddev, rdev); | |
c4647292 | 5710 | |
a4bd82d0 | 5711 | set_capacity(disk, 0); |
6e17b027 | 5712 | mutex_unlock(&mddev->open_mutex); |
f0b4f7e2 | 5713 | mddev->changed = 1; |
a4bd82d0 | 5714 | revalidate_disk(disk); |
0d4ca600 | 5715 | |
a4bd82d0 N |
5716 | if (mddev->ro) |
5717 | mddev->ro = 0; | |
6e17b027 N |
5718 | } else |
5719 | mutex_unlock(&mddev->open_mutex); | |
1da177e4 LT |
5720 | /* |
5721 | * Free resources if final stop | |
5722 | */ | |
9e653b63 | 5723 | if (mode == 0) { |
9d48739e | 5724 | pr_info("md: %s stopped.\n", mdname(mddev)); |
1da177e4 | 5725 | |
978f946b | 5726 | bitmap_destroy(mddev); |
c3d9714e | 5727 | if (mddev->bitmap_info.file) { |
4af1a041 N |
5728 | struct file *f = mddev->bitmap_info.file; |
5729 | spin_lock(&mddev->lock); | |
c3d9714e | 5730 | mddev->bitmap_info.file = NULL; |
4af1a041 N |
5731 | spin_unlock(&mddev->lock); |
5732 | fput(f); | |
978f946b | 5733 | } |
c3d9714e | 5734 | mddev->bitmap_info.offset = 0; |
978f946b | 5735 | |
1da177e4 LT |
5736 | export_array(mddev); |
5737 | ||
6177b472 | 5738 | md_clean(mddev); |
efeb53c0 N |
5739 | if (mddev->hold_active == UNTIL_STOP) |
5740 | mddev->hold_active = 0; | |
a4bd82d0 | 5741 | } |
d7603b7e | 5742 | md_new_event(mddev); |
00bcb4ac | 5743 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6e17b027 | 5744 | return 0; |
1da177e4 LT |
5745 | } |
5746 | ||
fdee8ae4 | 5747 | #ifndef MODULE |
fd01b88c | 5748 | static void autorun_array(struct mddev *mddev) |
1da177e4 | 5749 | { |
3cb03002 | 5750 | struct md_rdev *rdev; |
1da177e4 LT |
5751 | int err; |
5752 | ||
a757e64c | 5753 | if (list_empty(&mddev->disks)) |
1da177e4 | 5754 | return; |
1da177e4 | 5755 | |
9d48739e | 5756 | pr_info("md: running: "); |
1da177e4 | 5757 | |
dafb20fa | 5758 | rdev_for_each(rdev, mddev) { |
1da177e4 | 5759 | char b[BDEVNAME_SIZE]; |
9d48739e | 5760 | pr_cont("<%s>", bdevname(rdev->bdev,b)); |
1da177e4 | 5761 | } |
9d48739e | 5762 | pr_cont("\n"); |
1da177e4 | 5763 | |
d710e138 | 5764 | err = do_md_run(mddev); |
1da177e4 | 5765 | if (err) { |
9d48739e | 5766 | pr_warn("md: do_md_run() returned %d\n", err); |
a05b7ea0 | 5767 | do_md_stop(mddev, 0, NULL); |
1da177e4 LT |
5768 | } |
5769 | } | |
5770 | ||
5771 | /* | |
5772 | * lets try to run arrays based on all disks that have arrived | |
5773 | * until now. (those are in pending_raid_disks) | |
5774 | * | |
5775 | * the method: pick the first pending disk, collect all disks with | |
5776 | * the same UUID, remove all from the pending list and put them into | |
5777 | * the 'same_array' list. Then order this list based on superblock | |
5778 | * update time (freshest comes first), kick out 'old' disks and | |
5779 | * compare superblocks. If everything's fine then run it. | |
5780 | * | |
5781 | * If "unit" is allocated, then bump its reference count | |
5782 | */ | |
5783 | static void autorun_devices(int part) | |
5784 | { | |
3cb03002 | 5785 | struct md_rdev *rdev0, *rdev, *tmp; |
fd01b88c | 5786 | struct mddev *mddev; |
1da177e4 LT |
5787 | char b[BDEVNAME_SIZE]; |
5788 | ||
9d48739e | 5789 | pr_info("md: autorun ...\n"); |
1da177e4 | 5790 | while (!list_empty(&pending_raid_disks)) { |
e8703fe1 | 5791 | int unit; |
1da177e4 | 5792 | dev_t dev; |
ad01c9e3 | 5793 | LIST_HEAD(candidates); |
1da177e4 | 5794 | rdev0 = list_entry(pending_raid_disks.next, |
3cb03002 | 5795 | struct md_rdev, same_set); |
1da177e4 | 5796 | |
9d48739e | 5797 | pr_debug("md: considering %s ...\n", bdevname(rdev0->bdev,b)); |
1da177e4 | 5798 | INIT_LIST_HEAD(&candidates); |
159ec1fc | 5799 | rdev_for_each_list(rdev, tmp, &pending_raid_disks) |
1da177e4 | 5800 | if (super_90_load(rdev, rdev0, 0) >= 0) { |
9d48739e N |
5801 | pr_debug("md: adding %s ...\n", |
5802 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
5803 | list_move(&rdev->same_set, &candidates); |
5804 | } | |
5805 | /* | |
5806 | * now we have a set of devices, with all of them having | |
5807 | * mostly sane superblocks. It's time to allocate the | |
5808 | * mddev. | |
5809 | */ | |
e8703fe1 N |
5810 | if (part) { |
5811 | dev = MKDEV(mdp_major, | |
5812 | rdev0->preferred_minor << MdpMinorShift); | |
5813 | unit = MINOR(dev) >> MdpMinorShift; | |
5814 | } else { | |
5815 | dev = MKDEV(MD_MAJOR, rdev0->preferred_minor); | |
5816 | unit = MINOR(dev); | |
5817 | } | |
5818 | if (rdev0->preferred_minor != unit) { | |
9d48739e N |
5819 | pr_warn("md: unit number in %s is bad: %d\n", |
5820 | bdevname(rdev0->bdev, b), rdev0->preferred_minor); | |
1da177e4 LT |
5821 | break; |
5822 | } | |
1da177e4 LT |
5823 | |
5824 | md_probe(dev, NULL, NULL); | |
5825 | mddev = mddev_find(dev); | |
9bbbca3a NB |
5826 | if (!mddev || !mddev->gendisk) { |
5827 | if (mddev) | |
5828 | mddev_put(mddev); | |
1da177e4 LT |
5829 | break; |
5830 | } | |
f72ffdd6 | 5831 | if (mddev_lock(mddev)) |
9d48739e | 5832 | pr_warn("md: %s locked, cannot run\n", mdname(mddev)); |
1da177e4 LT |
5833 | else if (mddev->raid_disks || mddev->major_version |
5834 | || !list_empty(&mddev->disks)) { | |
9d48739e | 5835 | pr_warn("md: %s already running, cannot run %s\n", |
1da177e4 LT |
5836 | mdname(mddev), bdevname(rdev0->bdev,b)); |
5837 | mddev_unlock(mddev); | |
5838 | } else { | |
9d48739e | 5839 | pr_debug("md: created %s\n", mdname(mddev)); |
1ec4a939 | 5840 | mddev->persistent = 1; |
159ec1fc | 5841 | rdev_for_each_list(rdev, tmp, &candidates) { |
1da177e4 LT |
5842 | list_del_init(&rdev->same_set); |
5843 | if (bind_rdev_to_array(rdev, mddev)) | |
5844 | export_rdev(rdev); | |
5845 | } | |
5846 | autorun_array(mddev); | |
5847 | mddev_unlock(mddev); | |
5848 | } | |
5849 | /* on success, candidates will be empty, on error | |
5850 | * it won't... | |
5851 | */ | |
159ec1fc | 5852 | rdev_for_each_list(rdev, tmp, &candidates) { |
4b80991c | 5853 | list_del_init(&rdev->same_set); |
1da177e4 | 5854 | export_rdev(rdev); |
4b80991c | 5855 | } |
1da177e4 LT |
5856 | mddev_put(mddev); |
5857 | } | |
9d48739e | 5858 | pr_info("md: ... autorun DONE.\n"); |
1da177e4 | 5859 | } |
fdee8ae4 | 5860 | #endif /* !MODULE */ |
1da177e4 | 5861 | |
f72ffdd6 | 5862 | static int get_version(void __user *arg) |
1da177e4 LT |
5863 | { |
5864 | mdu_version_t ver; | |
5865 | ||
5866 | ver.major = MD_MAJOR_VERSION; | |
5867 | ver.minor = MD_MINOR_VERSION; | |
5868 | ver.patchlevel = MD_PATCHLEVEL_VERSION; | |
5869 | ||
5870 | if (copy_to_user(arg, &ver, sizeof(ver))) | |
5871 | return -EFAULT; | |
5872 | ||
5873 | return 0; | |
5874 | } | |
5875 | ||
f72ffdd6 | 5876 | static int get_array_info(struct mddev *mddev, void __user *arg) |
1da177e4 LT |
5877 | { |
5878 | mdu_array_info_t info; | |
a9f326eb | 5879 | int nr,working,insync,failed,spare; |
3cb03002 | 5880 | struct md_rdev *rdev; |
1da177e4 | 5881 | |
1ca69c4b N |
5882 | nr = working = insync = failed = spare = 0; |
5883 | rcu_read_lock(); | |
5884 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 5885 | nr++; |
b2d444d7 | 5886 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
5887 | failed++; |
5888 | else { | |
5889 | working++; | |
b2d444d7 | 5890 | if (test_bit(In_sync, &rdev->flags)) |
f72ffdd6 | 5891 | insync++; |
b347af81 SL |
5892 | else if (test_bit(Journal, &rdev->flags)) |
5893 | /* TODO: add journal count to md_u.h */ | |
5894 | ; | |
1da177e4 LT |
5895 | else |
5896 | spare++; | |
5897 | } | |
5898 | } | |
1ca69c4b | 5899 | rcu_read_unlock(); |
1da177e4 LT |
5900 | |
5901 | info.major_version = mddev->major_version; | |
5902 | info.minor_version = mddev->minor_version; | |
5903 | info.patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 5904 | info.ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 5905 | info.level = mddev->level; |
58c0fed4 AN |
5906 | info.size = mddev->dev_sectors / 2; |
5907 | if (info.size != mddev->dev_sectors / 2) /* overflow */ | |
284ae7ca | 5908 | info.size = -1; |
1da177e4 LT |
5909 | info.nr_disks = nr; |
5910 | info.raid_disks = mddev->raid_disks; | |
5911 | info.md_minor = mddev->md_minor; | |
5912 | info.not_persistent= !mddev->persistent; | |
5913 | ||
9ebc6ef1 | 5914 | info.utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
5915 | info.state = 0; |
5916 | if (mddev->in_sync) | |
5917 | info.state = (1<<MD_SB_CLEAN); | |
c3d9714e | 5918 | if (mddev->bitmap && mddev->bitmap_info.offset) |
9bd35920 | 5919 | info.state |= (1<<MD_SB_BITMAP_PRESENT); |
ca8895d9 GR |
5920 | if (mddev_is_clustered(mddev)) |
5921 | info.state |= (1<<MD_SB_CLUSTERED); | |
a9f326eb | 5922 | info.active_disks = insync; |
1da177e4 LT |
5923 | info.working_disks = working; |
5924 | info.failed_disks = failed; | |
5925 | info.spare_disks = spare; | |
5926 | ||
5927 | info.layout = mddev->layout; | |
9d8f0363 | 5928 | info.chunk_size = mddev->chunk_sectors << 9; |
1da177e4 LT |
5929 | |
5930 | if (copy_to_user(arg, &info, sizeof(info))) | |
5931 | return -EFAULT; | |
5932 | ||
5933 | return 0; | |
5934 | } | |
5935 | ||
f72ffdd6 | 5936 | static int get_bitmap_file(struct mddev *mddev, void __user * arg) |
32a7627c N |
5937 | { |
5938 | mdu_bitmap_file_t *file = NULL; /* too big for stack allocation */ | |
f4ad3d38 | 5939 | char *ptr; |
4af1a041 | 5940 | int err; |
32a7627c | 5941 | |
b6878d9e | 5942 | file = kzalloc(sizeof(*file), GFP_NOIO); |
32a7627c | 5943 | if (!file) |
4af1a041 | 5944 | return -ENOMEM; |
32a7627c | 5945 | |
4af1a041 N |
5946 | err = 0; |
5947 | spin_lock(&mddev->lock); | |
25eafe1a BR |
5948 | /* bitmap enabled */ |
5949 | if (mddev->bitmap_info.file) { | |
5950 | ptr = file_path(mddev->bitmap_info.file, file->pathname, | |
5951 | sizeof(file->pathname)); | |
5952 | if (IS_ERR(ptr)) | |
5953 | err = PTR_ERR(ptr); | |
5954 | else | |
5955 | memmove(file->pathname, ptr, | |
5956 | sizeof(file->pathname)-(ptr-file->pathname)); | |
5957 | } | |
4af1a041 | 5958 | spin_unlock(&mddev->lock); |
32a7627c | 5959 | |
4af1a041 N |
5960 | if (err == 0 && |
5961 | copy_to_user(arg, file, sizeof(*file))) | |
32a7627c | 5962 | err = -EFAULT; |
4af1a041 | 5963 | |
32a7627c N |
5964 | kfree(file); |
5965 | return err; | |
5966 | } | |
5967 | ||
f72ffdd6 | 5968 | static int get_disk_info(struct mddev *mddev, void __user * arg) |
1da177e4 LT |
5969 | { |
5970 | mdu_disk_info_t info; | |
3cb03002 | 5971 | struct md_rdev *rdev; |
1da177e4 LT |
5972 | |
5973 | if (copy_from_user(&info, arg, sizeof(info))) | |
5974 | return -EFAULT; | |
5975 | ||
1ca69c4b | 5976 | rcu_read_lock(); |
57d051dc | 5977 | rdev = md_find_rdev_nr_rcu(mddev, info.number); |
1da177e4 LT |
5978 | if (rdev) { |
5979 | info.major = MAJOR(rdev->bdev->bd_dev); | |
5980 | info.minor = MINOR(rdev->bdev->bd_dev); | |
5981 | info.raid_disk = rdev->raid_disk; | |
5982 | info.state = 0; | |
b2d444d7 | 5983 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 5984 | info.state |= (1<<MD_DISK_FAULTY); |
b2d444d7 | 5985 | else if (test_bit(In_sync, &rdev->flags)) { |
1da177e4 LT |
5986 | info.state |= (1<<MD_DISK_ACTIVE); |
5987 | info.state |= (1<<MD_DISK_SYNC); | |
5988 | } | |
9efdca16 | 5989 | if (test_bit(Journal, &rdev->flags)) |
bac624f3 | 5990 | info.state |= (1<<MD_DISK_JOURNAL); |
8ddf9efe N |
5991 | if (test_bit(WriteMostly, &rdev->flags)) |
5992 | info.state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
5993 | if (test_bit(FailFast, &rdev->flags)) |
5994 | info.state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 LT |
5995 | } else { |
5996 | info.major = info.minor = 0; | |
5997 | info.raid_disk = -1; | |
5998 | info.state = (1<<MD_DISK_REMOVED); | |
5999 | } | |
1ca69c4b | 6000 | rcu_read_unlock(); |
1da177e4 LT |
6001 | |
6002 | if (copy_to_user(arg, &info, sizeof(info))) | |
6003 | return -EFAULT; | |
6004 | ||
6005 | return 0; | |
6006 | } | |
6007 | ||
f72ffdd6 | 6008 | static int add_new_disk(struct mddev *mddev, mdu_disk_info_t *info) |
1da177e4 LT |
6009 | { |
6010 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 6011 | struct md_rdev *rdev; |
1da177e4 LT |
6012 | dev_t dev = MKDEV(info->major,info->minor); |
6013 | ||
1aee41f6 GR |
6014 | if (mddev_is_clustered(mddev) && |
6015 | !(info->state & ((1 << MD_DISK_CLUSTER_ADD) | (1 << MD_DISK_CANDIDATE)))) { | |
9d48739e N |
6016 | pr_warn("%s: Cannot add to clustered mddev.\n", |
6017 | mdname(mddev)); | |
1aee41f6 GR |
6018 | return -EINVAL; |
6019 | } | |
6020 | ||
1da177e4 LT |
6021 | if (info->major != MAJOR(dev) || info->minor != MINOR(dev)) |
6022 | return -EOVERFLOW; | |
6023 | ||
6024 | if (!mddev->raid_disks) { | |
6025 | int err; | |
6026 | /* expecting a device which has a superblock */ | |
6027 | rdev = md_import_device(dev, mddev->major_version, mddev->minor_version); | |
6028 | if (IS_ERR(rdev)) { | |
9d48739e | 6029 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6030 | PTR_ERR(rdev)); |
6031 | return PTR_ERR(rdev); | |
6032 | } | |
6033 | if (!list_empty(&mddev->disks)) { | |
3cb03002 N |
6034 | struct md_rdev *rdev0 |
6035 | = list_entry(mddev->disks.next, | |
6036 | struct md_rdev, same_set); | |
a9f326eb | 6037 | err = super_types[mddev->major_version] |
1da177e4 LT |
6038 | .load_super(rdev, rdev0, mddev->minor_version); |
6039 | if (err < 0) { | |
9d48739e | 6040 | pr_warn("md: %s has different UUID to %s\n", |
f72ffdd6 | 6041 | bdevname(rdev->bdev,b), |
1da177e4 LT |
6042 | bdevname(rdev0->bdev,b2)); |
6043 | export_rdev(rdev); | |
6044 | return -EINVAL; | |
6045 | } | |
6046 | } | |
6047 | err = bind_rdev_to_array(rdev, mddev); | |
6048 | if (err) | |
6049 | export_rdev(rdev); | |
6050 | return err; | |
6051 | } | |
6052 | ||
6053 | /* | |
6054 | * add_new_disk can be used once the array is assembled | |
6055 | * to add "hot spares". They must already have a superblock | |
6056 | * written | |
6057 | */ | |
6058 | if (mddev->pers) { | |
6059 | int err; | |
6060 | if (!mddev->pers->hot_add_disk) { | |
9d48739e N |
6061 | pr_warn("%s: personality does not support diskops!\n", |
6062 | mdname(mddev)); | |
1da177e4 LT |
6063 | return -EINVAL; |
6064 | } | |
7b1e35f6 N |
6065 | if (mddev->persistent) |
6066 | rdev = md_import_device(dev, mddev->major_version, | |
6067 | mddev->minor_version); | |
6068 | else | |
6069 | rdev = md_import_device(dev, -1, -1); | |
1da177e4 | 6070 | if (IS_ERR(rdev)) { |
9d48739e | 6071 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6072 | PTR_ERR(rdev)); |
6073 | return PTR_ERR(rdev); | |
6074 | } | |
1a855a06 | 6075 | /* set saved_raid_disk if appropriate */ |
41158c7e N |
6076 | if (!mddev->persistent) { |
6077 | if (info->state & (1<<MD_DISK_SYNC) && | |
bf572541 | 6078 | info->raid_disk < mddev->raid_disks) { |
41158c7e | 6079 | rdev->raid_disk = info->raid_disk; |
bf572541 | 6080 | set_bit(In_sync, &rdev->flags); |
8313b8e5 | 6081 | clear_bit(Bitmap_sync, &rdev->flags); |
bf572541 | 6082 | } else |
41158c7e | 6083 | rdev->raid_disk = -1; |
f466722c | 6084 | rdev->saved_raid_disk = rdev->raid_disk; |
41158c7e N |
6085 | } else |
6086 | super_types[mddev->major_version]. | |
6087 | validate_super(mddev, rdev); | |
bedd86b7 | 6088 | if ((info->state & (1<<MD_DISK_SYNC)) && |
f4563091 | 6089 | rdev->raid_disk != info->raid_disk) { |
bedd86b7 N |
6090 | /* This was a hot-add request, but events doesn't |
6091 | * match, so reject it. | |
6092 | */ | |
6093 | export_rdev(rdev); | |
6094 | return -EINVAL; | |
6095 | } | |
6096 | ||
b2d444d7 | 6097 | clear_bit(In_sync, &rdev->flags); /* just to be sure */ |
8ddf9efe N |
6098 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6099 | set_bit(WriteMostly, &rdev->flags); | |
575a80fa N |
6100 | else |
6101 | clear_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6102 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6103 | set_bit(FailFast, &rdev->flags); | |
6104 | else | |
6105 | clear_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6106 | |
f6b6ec5c SL |
6107 | if (info->state & (1<<MD_DISK_JOURNAL)) { |
6108 | struct md_rdev *rdev2; | |
6109 | bool has_journal = false; | |
6110 | ||
6111 | /* make sure no existing journal disk */ | |
6112 | rdev_for_each(rdev2, mddev) { | |
6113 | if (test_bit(Journal, &rdev2->flags)) { | |
6114 | has_journal = true; | |
6115 | break; | |
6116 | } | |
6117 | } | |
6118 | if (has_journal) { | |
6119 | export_rdev(rdev); | |
6120 | return -EBUSY; | |
6121 | } | |
bac624f3 | 6122 | set_bit(Journal, &rdev->flags); |
f6b6ec5c | 6123 | } |
1aee41f6 GR |
6124 | /* |
6125 | * check whether the device shows up in other nodes | |
6126 | */ | |
6127 | if (mddev_is_clustered(mddev)) { | |
dbb64f86 | 6128 | if (info->state & (1 << MD_DISK_CANDIDATE)) |
1aee41f6 | 6129 | set_bit(Candidate, &rdev->flags); |
dbb64f86 | 6130 | else if (info->state & (1 << MD_DISK_CLUSTER_ADD)) { |
1aee41f6 | 6131 | /* --add initiated by this node */ |
dbb64f86 | 6132 | err = md_cluster_ops->add_new_disk(mddev, rdev); |
1aee41f6 | 6133 | if (err) { |
1aee41f6 GR |
6134 | export_rdev(rdev); |
6135 | return err; | |
6136 | } | |
6137 | } | |
6138 | } | |
6139 | ||
1da177e4 LT |
6140 | rdev->raid_disk = -1; |
6141 | err = bind_rdev_to_array(rdev, mddev); | |
dbb64f86 | 6142 | |
1da177e4 LT |
6143 | if (err) |
6144 | export_rdev(rdev); | |
dbb64f86 GR |
6145 | |
6146 | if (mddev_is_clustered(mddev)) { | |
e566aef1 GJ |
6147 | if (info->state & (1 << MD_DISK_CANDIDATE)) { |
6148 | if (!err) { | |
6149 | err = md_cluster_ops->new_disk_ack(mddev, | |
6150 | err == 0); | |
6151 | if (err) | |
6152 | md_kick_rdev_from_array(rdev); | |
6153 | } | |
6154 | } else { | |
dbb64f86 GR |
6155 | if (err) |
6156 | md_cluster_ops->add_new_disk_cancel(mddev); | |
6157 | else | |
6158 | err = add_bound_rdev(rdev); | |
6159 | } | |
6160 | ||
6161 | } else if (!err) | |
a6da4ef8 | 6162 | err = add_bound_rdev(rdev); |
dbb64f86 | 6163 | |
1da177e4 LT |
6164 | return err; |
6165 | } | |
6166 | ||
6167 | /* otherwise, add_new_disk is only allowed | |
6168 | * for major_version==0 superblocks | |
6169 | */ | |
6170 | if (mddev->major_version != 0) { | |
9d48739e | 6171 | pr_warn("%s: ADD_NEW_DISK not supported\n", mdname(mddev)); |
1da177e4 LT |
6172 | return -EINVAL; |
6173 | } | |
6174 | ||
6175 | if (!(info->state & (1<<MD_DISK_FAULTY))) { | |
6176 | int err; | |
d710e138 | 6177 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6178 | if (IS_ERR(rdev)) { |
9d48739e | 6179 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6180 | PTR_ERR(rdev)); |
6181 | return PTR_ERR(rdev); | |
6182 | } | |
6183 | rdev->desc_nr = info->number; | |
6184 | if (info->raid_disk < mddev->raid_disks) | |
6185 | rdev->raid_disk = info->raid_disk; | |
6186 | else | |
6187 | rdev->raid_disk = -1; | |
6188 | ||
1da177e4 | 6189 | if (rdev->raid_disk < mddev->raid_disks) |
b2d444d7 N |
6190 | if (info->state & (1<<MD_DISK_SYNC)) |
6191 | set_bit(In_sync, &rdev->flags); | |
1da177e4 | 6192 | |
8ddf9efe N |
6193 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6194 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6195 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6196 | set_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6197 | |
1da177e4 | 6198 | if (!mddev->persistent) { |
9d48739e | 6199 | pr_debug("md: nonpersistent superblock ...\n"); |
77304d2a MS |
6200 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
6201 | } else | |
57b2caa3 | 6202 | rdev->sb_start = calc_dev_sboffset(rdev); |
8190e754 | 6203 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6204 | |
2bf071bf N |
6205 | err = bind_rdev_to_array(rdev, mddev); |
6206 | if (err) { | |
6207 | export_rdev(rdev); | |
6208 | return err; | |
6209 | } | |
1da177e4 LT |
6210 | } |
6211 | ||
6212 | return 0; | |
6213 | } | |
6214 | ||
f72ffdd6 | 6215 | static int hot_remove_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6216 | { |
6217 | char b[BDEVNAME_SIZE]; | |
3cb03002 | 6218 | struct md_rdev *rdev; |
1da177e4 | 6219 | |
1da177e4 LT |
6220 | rdev = find_rdev(mddev, dev); |
6221 | if (!rdev) | |
6222 | return -ENXIO; | |
6223 | ||
2910ff17 GR |
6224 | if (rdev->raid_disk < 0) |
6225 | goto kick_rdev; | |
293467aa | 6226 | |
3ea8929d N |
6227 | clear_bit(Blocked, &rdev->flags); |
6228 | remove_and_add_spares(mddev, rdev); | |
6229 | ||
1da177e4 LT |
6230 | if (rdev->raid_disk >= 0) |
6231 | goto busy; | |
6232 | ||
2910ff17 | 6233 | kick_rdev: |
54a88392 | 6234 | if (mddev_is_clustered(mddev)) |
88bcfef7 GR |
6235 | md_cluster_ops->remove_disk(mddev, rdev); |
6236 | ||
fb56dfef | 6237 | md_kick_rdev_from_array(rdev); |
2953079c | 6238 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6239 | if (mddev->thread) |
6240 | md_wakeup_thread(mddev->thread); | |
6241 | else | |
6242 | md_update_sb(mddev, 1); | |
d7603b7e | 6243 | md_new_event(mddev); |
1da177e4 LT |
6244 | |
6245 | return 0; | |
6246 | busy: | |
9d48739e N |
6247 | pr_debug("md: cannot remove active disk %s from %s ...\n", |
6248 | bdevname(rdev->bdev,b), mdname(mddev)); | |
1da177e4 LT |
6249 | return -EBUSY; |
6250 | } | |
6251 | ||
f72ffdd6 | 6252 | static int hot_add_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6253 | { |
6254 | char b[BDEVNAME_SIZE]; | |
6255 | int err; | |
3cb03002 | 6256 | struct md_rdev *rdev; |
1da177e4 LT |
6257 | |
6258 | if (!mddev->pers) | |
6259 | return -ENODEV; | |
6260 | ||
6261 | if (mddev->major_version != 0) { | |
9d48739e | 6262 | pr_warn("%s: HOT_ADD may only be used with version-0 superblocks.\n", |
1da177e4 LT |
6263 | mdname(mddev)); |
6264 | return -EINVAL; | |
6265 | } | |
6266 | if (!mddev->pers->hot_add_disk) { | |
9d48739e | 6267 | pr_warn("%s: personality does not support diskops!\n", |
1da177e4 LT |
6268 | mdname(mddev)); |
6269 | return -EINVAL; | |
6270 | } | |
6271 | ||
d710e138 | 6272 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6273 | if (IS_ERR(rdev)) { |
9d48739e | 6274 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6275 | PTR_ERR(rdev)); |
6276 | return -EINVAL; | |
6277 | } | |
6278 | ||
6279 | if (mddev->persistent) | |
57b2caa3 | 6280 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 6281 | else |
77304d2a | 6282 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
1da177e4 | 6283 | |
8190e754 | 6284 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6285 | |
b2d444d7 | 6286 | if (test_bit(Faulty, &rdev->flags)) { |
9d48739e | 6287 | pr_warn("md: can not hot-add faulty %s disk to %s!\n", |
1da177e4 LT |
6288 | bdevname(rdev->bdev,b), mdname(mddev)); |
6289 | err = -EINVAL; | |
6290 | goto abort_export; | |
6291 | } | |
293467aa | 6292 | |
b2d444d7 | 6293 | clear_bit(In_sync, &rdev->flags); |
1da177e4 | 6294 | rdev->desc_nr = -1; |
5842730d | 6295 | rdev->saved_raid_disk = -1; |
2bf071bf N |
6296 | err = bind_rdev_to_array(rdev, mddev); |
6297 | if (err) | |
2aa82191 | 6298 | goto abort_export; |
1da177e4 LT |
6299 | |
6300 | /* | |
6301 | * The rest should better be atomic, we can have disk failures | |
6302 | * noticed in interrupt contexts ... | |
6303 | */ | |
6304 | ||
1da177e4 LT |
6305 | rdev->raid_disk = -1; |
6306 | ||
2953079c | 6307 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6308 | if (!mddev->thread) |
6309 | md_update_sb(mddev, 1); | |
1da177e4 LT |
6310 | /* |
6311 | * Kick recovery, maybe this spare has to be added to the | |
6312 | * array immediately. | |
6313 | */ | |
6314 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6315 | md_wakeup_thread(mddev->thread); | |
d7603b7e | 6316 | md_new_event(mddev); |
1da177e4 LT |
6317 | return 0; |
6318 | ||
1da177e4 LT |
6319 | abort_export: |
6320 | export_rdev(rdev); | |
6321 | return err; | |
6322 | } | |
6323 | ||
fd01b88c | 6324 | static int set_bitmap_file(struct mddev *mddev, int fd) |
32a7627c | 6325 | { |
035328c2 | 6326 | int err = 0; |
32a7627c | 6327 | |
36fa3063 | 6328 | if (mddev->pers) { |
d66b1b39 | 6329 | if (!mddev->pers->quiesce || !mddev->thread) |
36fa3063 N |
6330 | return -EBUSY; |
6331 | if (mddev->recovery || mddev->sync_thread) | |
6332 | return -EBUSY; | |
6333 | /* we should be able to change the bitmap.. */ | |
6334 | } | |
32a7627c | 6335 | |
36fa3063 | 6336 | if (fd >= 0) { |
035328c2 | 6337 | struct inode *inode; |
1e594bb2 N |
6338 | struct file *f; |
6339 | ||
6340 | if (mddev->bitmap || mddev->bitmap_info.file) | |
36fa3063 | 6341 | return -EEXIST; /* cannot add when bitmap is present */ |
1e594bb2 | 6342 | f = fget(fd); |
32a7627c | 6343 | |
1e594bb2 | 6344 | if (f == NULL) { |
9d48739e N |
6345 | pr_warn("%s: error: failed to get bitmap file\n", |
6346 | mdname(mddev)); | |
36fa3063 N |
6347 | return -EBADF; |
6348 | } | |
6349 | ||
1e594bb2 | 6350 | inode = f->f_mapping->host; |
035328c2 | 6351 | if (!S_ISREG(inode->i_mode)) { |
9d48739e N |
6352 | pr_warn("%s: error: bitmap file must be a regular file\n", |
6353 | mdname(mddev)); | |
035328c2 | 6354 | err = -EBADF; |
1e594bb2 | 6355 | } else if (!(f->f_mode & FMODE_WRITE)) { |
9d48739e N |
6356 | pr_warn("%s: error: bitmap file must open for write\n", |
6357 | mdname(mddev)); | |
035328c2 N |
6358 | err = -EBADF; |
6359 | } else if (atomic_read(&inode->i_writecount) != 1) { | |
9d48739e N |
6360 | pr_warn("%s: error: bitmap file is already in use\n", |
6361 | mdname(mddev)); | |
035328c2 N |
6362 | err = -EBUSY; |
6363 | } | |
6364 | if (err) { | |
1e594bb2 | 6365 | fput(f); |
36fa3063 N |
6366 | return err; |
6367 | } | |
1e594bb2 | 6368 | mddev->bitmap_info.file = f; |
c3d9714e | 6369 | mddev->bitmap_info.offset = 0; /* file overrides offset */ |
36fa3063 N |
6370 | } else if (mddev->bitmap == NULL) |
6371 | return -ENOENT; /* cannot remove what isn't there */ | |
6372 | err = 0; | |
6373 | if (mddev->pers) { | |
6374 | mddev->pers->quiesce(mddev, 1); | |
69e51b44 | 6375 | if (fd >= 0) { |
f9209a32 GR |
6376 | struct bitmap *bitmap; |
6377 | ||
6378 | bitmap = bitmap_create(mddev, -1); | |
6379 | if (!IS_ERR(bitmap)) { | |
6380 | mddev->bitmap = bitmap; | |
69e51b44 | 6381 | err = bitmap_load(mddev); |
ba599aca N |
6382 | } else |
6383 | err = PTR_ERR(bitmap); | |
69e51b44 | 6384 | } |
d7375ab3 | 6385 | if (fd < 0 || err) { |
36fa3063 | 6386 | bitmap_destroy(mddev); |
d7375ab3 N |
6387 | fd = -1; /* make sure to put the file */ |
6388 | } | |
36fa3063 | 6389 | mddev->pers->quiesce(mddev, 0); |
d7375ab3 N |
6390 | } |
6391 | if (fd < 0) { | |
4af1a041 N |
6392 | struct file *f = mddev->bitmap_info.file; |
6393 | if (f) { | |
6394 | spin_lock(&mddev->lock); | |
6395 | mddev->bitmap_info.file = NULL; | |
6396 | spin_unlock(&mddev->lock); | |
6397 | fput(f); | |
6398 | } | |
36fa3063 N |
6399 | } |
6400 | ||
32a7627c N |
6401 | return err; |
6402 | } | |
6403 | ||
1da177e4 LT |
6404 | /* |
6405 | * set_array_info is used two different ways | |
6406 | * The original usage is when creating a new array. | |
6407 | * In this usage, raid_disks is > 0 and it together with | |
6408 | * level, size, not_persistent,layout,chunksize determine the | |
6409 | * shape of the array. | |
6410 | * This will always create an array with a type-0.90.0 superblock. | |
6411 | * The newer usage is when assembling an array. | |
6412 | * In this case raid_disks will be 0, and the major_version field is | |
6413 | * use to determine which style super-blocks are to be found on the devices. | |
6414 | * The minor and patch _version numbers are also kept incase the | |
6415 | * super_block handler wishes to interpret them. | |
6416 | */ | |
f72ffdd6 | 6417 | static int set_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
6418 | { |
6419 | ||
6420 | if (info->raid_disks == 0) { | |
6421 | /* just setting version number for superblock loading */ | |
6422 | if (info->major_version < 0 || | |
50511da3 | 6423 | info->major_version >= ARRAY_SIZE(super_types) || |
1da177e4 LT |
6424 | super_types[info->major_version].name == NULL) { |
6425 | /* maybe try to auto-load a module? */ | |
9d48739e | 6426 | pr_warn("md: superblock version %d not known\n", |
1da177e4 LT |
6427 | info->major_version); |
6428 | return -EINVAL; | |
6429 | } | |
6430 | mddev->major_version = info->major_version; | |
6431 | mddev->minor_version = info->minor_version; | |
6432 | mddev->patch_version = info->patch_version; | |
3f9d7b0d | 6433 | mddev->persistent = !info->not_persistent; |
cbd19983 N |
6434 | /* ensure mddev_put doesn't delete this now that there |
6435 | * is some minimal configuration. | |
6436 | */ | |
9ebc6ef1 | 6437 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
6438 | return 0; |
6439 | } | |
6440 | mddev->major_version = MD_MAJOR_VERSION; | |
6441 | mddev->minor_version = MD_MINOR_VERSION; | |
6442 | mddev->patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6443 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
6444 | |
6445 | mddev->level = info->level; | |
17115e03 | 6446 | mddev->clevel[0] = 0; |
58c0fed4 | 6447 | mddev->dev_sectors = 2 * (sector_t)info->size; |
1da177e4 LT |
6448 | mddev->raid_disks = info->raid_disks; |
6449 | /* don't set md_minor, it is determined by which /dev/md* was | |
6450 | * openned | |
6451 | */ | |
6452 | if (info->state & (1<<MD_SB_CLEAN)) | |
6453 | mddev->recovery_cp = MaxSector; | |
6454 | else | |
6455 | mddev->recovery_cp = 0; | |
6456 | mddev->persistent = ! info->not_persistent; | |
e691063a | 6457 | mddev->external = 0; |
1da177e4 LT |
6458 | |
6459 | mddev->layout = info->layout; | |
9d8f0363 | 6460 | mddev->chunk_sectors = info->chunk_size >> 9; |
1da177e4 LT |
6461 | |
6462 | mddev->max_disks = MD_SB_DISKS; | |
6463 | ||
2953079c | 6464 | if (mddev->persistent) { |
e691063a | 6465 | mddev->flags = 0; |
2953079c SL |
6466 | mddev->sb_flags = 0; |
6467 | } | |
6468 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
1da177e4 | 6469 | |
c3d9714e | 6470 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 6471 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
c3d9714e | 6472 | mddev->bitmap_info.offset = 0; |
b2a2703c | 6473 | |
f6705578 N |
6474 | mddev->reshape_position = MaxSector; |
6475 | ||
1da177e4 LT |
6476 | /* |
6477 | * Generate a 128 bit UUID | |
6478 | */ | |
6479 | get_random_bytes(mddev->uuid, 16); | |
6480 | ||
f6705578 | 6481 | mddev->new_level = mddev->level; |
664e7c41 | 6482 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
6483 | mddev->new_layout = mddev->layout; |
6484 | mddev->delta_disks = 0; | |
2c810cdd | 6485 | mddev->reshape_backwards = 0; |
f6705578 | 6486 | |
1da177e4 LT |
6487 | return 0; |
6488 | } | |
6489 | ||
fd01b88c | 6490 | void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors) |
1f403624 | 6491 | { |
b522adcd DW |
6492 | WARN(!mddev_is_locked(mddev), "%s: unlocked mddev!\n", __func__); |
6493 | ||
6494 | if (mddev->external_size) | |
6495 | return; | |
6496 | ||
1f403624 DW |
6497 | mddev->array_sectors = array_sectors; |
6498 | } | |
6499 | EXPORT_SYMBOL(md_set_array_sectors); | |
6500 | ||
fd01b88c | 6501 | static int update_size(struct mddev *mddev, sector_t num_sectors) |
a35b0d69 | 6502 | { |
3cb03002 | 6503 | struct md_rdev *rdev; |
a35b0d69 | 6504 | int rv; |
d71f9f88 | 6505 | int fit = (num_sectors == 0); |
a35b0d69 | 6506 | |
ab5a98b1 GJ |
6507 | /* cluster raid doesn't support update size */ |
6508 | if (mddev_is_clustered(mddev)) | |
6509 | return -EINVAL; | |
6510 | ||
a35b0d69 N |
6511 | if (mddev->pers->resize == NULL) |
6512 | return -EINVAL; | |
d71f9f88 AN |
6513 | /* The "num_sectors" is the number of sectors of each device that |
6514 | * is used. This can only make sense for arrays with redundancy. | |
6515 | * linear and raid0 always use whatever space is available. We can only | |
6516 | * consider changing this number if no resync or reconstruction is | |
6517 | * happening, and if the new size is acceptable. It must fit before the | |
0f420358 | 6518 | * sb_start or, if that is <data_offset, it must fit before the size |
d71f9f88 AN |
6519 | * of each device. If num_sectors is zero, we find the largest size |
6520 | * that fits. | |
a35b0d69 | 6521 | */ |
f851b60d N |
6522 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
6523 | mddev->sync_thread) | |
a35b0d69 | 6524 | return -EBUSY; |
bd8839e0 N |
6525 | if (mddev->ro) |
6526 | return -EROFS; | |
a4a6125a | 6527 | |
dafb20fa | 6528 | rdev_for_each(rdev, mddev) { |
dd8ac336 | 6529 | sector_t avail = rdev->sectors; |
01ab5662 | 6530 | |
d71f9f88 AN |
6531 | if (fit && (num_sectors == 0 || num_sectors > avail)) |
6532 | num_sectors = avail; | |
6533 | if (avail < num_sectors) | |
a35b0d69 N |
6534 | return -ENOSPC; |
6535 | } | |
d71f9f88 | 6536 | rv = mddev->pers->resize(mddev, num_sectors); |
449aad3e N |
6537 | if (!rv) |
6538 | revalidate_disk(mddev->gendisk); | |
a35b0d69 N |
6539 | return rv; |
6540 | } | |
6541 | ||
fd01b88c | 6542 | static int update_raid_disks(struct mddev *mddev, int raid_disks) |
da943b99 N |
6543 | { |
6544 | int rv; | |
c6563a8c | 6545 | struct md_rdev *rdev; |
da943b99 | 6546 | /* change the number of raid disks */ |
63c70c4f | 6547 | if (mddev->pers->check_reshape == NULL) |
da943b99 | 6548 | return -EINVAL; |
bd8839e0 N |
6549 | if (mddev->ro) |
6550 | return -EROFS; | |
da943b99 | 6551 | if (raid_disks <= 0 || |
233fca36 | 6552 | (mddev->max_disks && raid_disks >= mddev->max_disks)) |
da943b99 | 6553 | return -EINVAL; |
f851b60d N |
6554 | if (mddev->sync_thread || |
6555 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || | |
6556 | mddev->reshape_position != MaxSector) | |
da943b99 | 6557 | return -EBUSY; |
c6563a8c N |
6558 | |
6559 | rdev_for_each(rdev, mddev) { | |
6560 | if (mddev->raid_disks < raid_disks && | |
6561 | rdev->data_offset < rdev->new_data_offset) | |
6562 | return -EINVAL; | |
6563 | if (mddev->raid_disks > raid_disks && | |
6564 | rdev->data_offset > rdev->new_data_offset) | |
6565 | return -EINVAL; | |
6566 | } | |
6567 | ||
63c70c4f | 6568 | mddev->delta_disks = raid_disks - mddev->raid_disks; |
2c810cdd N |
6569 | if (mddev->delta_disks < 0) |
6570 | mddev->reshape_backwards = 1; | |
6571 | else if (mddev->delta_disks > 0) | |
6572 | mddev->reshape_backwards = 0; | |
63c70c4f N |
6573 | |
6574 | rv = mddev->pers->check_reshape(mddev); | |
2c810cdd | 6575 | if (rv < 0) { |
de171cb9 | 6576 | mddev->delta_disks = 0; |
2c810cdd N |
6577 | mddev->reshape_backwards = 0; |
6578 | } | |
da943b99 N |
6579 | return rv; |
6580 | } | |
6581 | ||
1da177e4 LT |
6582 | /* |
6583 | * update_array_info is used to change the configuration of an | |
6584 | * on-line array. | |
6585 | * The version, ctime,level,size,raid_disks,not_persistent, layout,chunk_size | |
6586 | * fields in the info are checked against the array. | |
6587 | * Any differences that cannot be handled will cause an error. | |
6588 | * Normally, only one change can be managed at a time. | |
6589 | */ | |
fd01b88c | 6590 | static int update_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
6591 | { |
6592 | int rv = 0; | |
6593 | int cnt = 0; | |
36fa3063 N |
6594 | int state = 0; |
6595 | ||
6596 | /* calculate expected state,ignoring low bits */ | |
c3d9714e | 6597 | if (mddev->bitmap && mddev->bitmap_info.offset) |
36fa3063 | 6598 | state |= (1 << MD_SB_BITMAP_PRESENT); |
1da177e4 LT |
6599 | |
6600 | if (mddev->major_version != info->major_version || | |
6601 | mddev->minor_version != info->minor_version || | |
6602 | /* mddev->patch_version != info->patch_version || */ | |
6603 | mddev->ctime != info->ctime || | |
6604 | mddev->level != info->level || | |
6605 | /* mddev->layout != info->layout || */ | |
4e023612 | 6606 | mddev->persistent != !info->not_persistent || |
9d8f0363 | 6607 | mddev->chunk_sectors != info->chunk_size >> 9 || |
36fa3063 N |
6608 | /* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */ |
6609 | ((state^info->state) & 0xfffffe00) | |
6610 | ) | |
1da177e4 LT |
6611 | return -EINVAL; |
6612 | /* Check there is only one change */ | |
58c0fed4 AN |
6613 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
6614 | cnt++; | |
6615 | if (mddev->raid_disks != info->raid_disks) | |
6616 | cnt++; | |
6617 | if (mddev->layout != info->layout) | |
6618 | cnt++; | |
6619 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) | |
6620 | cnt++; | |
6621 | if (cnt == 0) | |
6622 | return 0; | |
6623 | if (cnt > 1) | |
6624 | return -EINVAL; | |
1da177e4 LT |
6625 | |
6626 | if (mddev->layout != info->layout) { | |
6627 | /* Change layout | |
6628 | * we don't need to do anything at the md level, the | |
6629 | * personality will take care of it all. | |
6630 | */ | |
50ac168a | 6631 | if (mddev->pers->check_reshape == NULL) |
1da177e4 | 6632 | return -EINVAL; |
597a711b N |
6633 | else { |
6634 | mddev->new_layout = info->layout; | |
50ac168a | 6635 | rv = mddev->pers->check_reshape(mddev); |
597a711b N |
6636 | if (rv) |
6637 | mddev->new_layout = mddev->layout; | |
6638 | return rv; | |
6639 | } | |
1da177e4 | 6640 | } |
58c0fed4 | 6641 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
d71f9f88 | 6642 | rv = update_size(mddev, (sector_t)info->size * 2); |
a35b0d69 | 6643 | |
da943b99 N |
6644 | if (mddev->raid_disks != info->raid_disks) |
6645 | rv = update_raid_disks(mddev, info->raid_disks); | |
6646 | ||
36fa3063 | 6647 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) { |
293467aa GR |
6648 | if (mddev->pers->quiesce == NULL || mddev->thread == NULL) { |
6649 | rv = -EINVAL; | |
6650 | goto err; | |
6651 | } | |
6652 | if (mddev->recovery || mddev->sync_thread) { | |
6653 | rv = -EBUSY; | |
6654 | goto err; | |
6655 | } | |
36fa3063 | 6656 | if (info->state & (1<<MD_SB_BITMAP_PRESENT)) { |
f9209a32 | 6657 | struct bitmap *bitmap; |
36fa3063 | 6658 | /* add the bitmap */ |
293467aa GR |
6659 | if (mddev->bitmap) { |
6660 | rv = -EEXIST; | |
6661 | goto err; | |
6662 | } | |
6663 | if (mddev->bitmap_info.default_offset == 0) { | |
6664 | rv = -EINVAL; | |
6665 | goto err; | |
6666 | } | |
c3d9714e N |
6667 | mddev->bitmap_info.offset = |
6668 | mddev->bitmap_info.default_offset; | |
6409bb05 N |
6669 | mddev->bitmap_info.space = |
6670 | mddev->bitmap_info.default_space; | |
36fa3063 | 6671 | mddev->pers->quiesce(mddev, 1); |
f9209a32 GR |
6672 | bitmap = bitmap_create(mddev, -1); |
6673 | if (!IS_ERR(bitmap)) { | |
6674 | mddev->bitmap = bitmap; | |
69e51b44 | 6675 | rv = bitmap_load(mddev); |
ba599aca N |
6676 | } else |
6677 | rv = PTR_ERR(bitmap); | |
36fa3063 N |
6678 | if (rv) |
6679 | bitmap_destroy(mddev); | |
6680 | mddev->pers->quiesce(mddev, 0); | |
6681 | } else { | |
6682 | /* remove the bitmap */ | |
293467aa GR |
6683 | if (!mddev->bitmap) { |
6684 | rv = -ENOENT; | |
6685 | goto err; | |
6686 | } | |
6687 | if (mddev->bitmap->storage.file) { | |
6688 | rv = -EINVAL; | |
6689 | goto err; | |
6690 | } | |
f6a2dc64 GJ |
6691 | if (mddev->bitmap_info.nodes) { |
6692 | /* hold PW on all the bitmap lock */ | |
6693 | if (md_cluster_ops->lock_all_bitmaps(mddev) <= 0) { | |
9d48739e | 6694 | pr_warn("md: can't change bitmap to none since the array is in use by more than one node\n"); |
f6a2dc64 GJ |
6695 | rv = -EPERM; |
6696 | md_cluster_ops->unlock_all_bitmaps(mddev); | |
6697 | goto err; | |
6698 | } | |
6699 | ||
6700 | mddev->bitmap_info.nodes = 0; | |
6701 | md_cluster_ops->leave(mddev); | |
6702 | } | |
36fa3063 N |
6703 | mddev->pers->quiesce(mddev, 1); |
6704 | bitmap_destroy(mddev); | |
6705 | mddev->pers->quiesce(mddev, 0); | |
c3d9714e | 6706 | mddev->bitmap_info.offset = 0; |
36fa3063 N |
6707 | } |
6708 | } | |
850b2b42 | 6709 | md_update_sb(mddev, 1); |
293467aa GR |
6710 | return rv; |
6711 | err: | |
1da177e4 LT |
6712 | return rv; |
6713 | } | |
6714 | ||
fd01b88c | 6715 | static int set_disk_faulty(struct mddev *mddev, dev_t dev) |
1da177e4 | 6716 | { |
3cb03002 | 6717 | struct md_rdev *rdev; |
1ca69c4b | 6718 | int err = 0; |
1da177e4 LT |
6719 | |
6720 | if (mddev->pers == NULL) | |
6721 | return -ENODEV; | |
6722 | ||
1ca69c4b N |
6723 | rcu_read_lock(); |
6724 | rdev = find_rdev_rcu(mddev, dev); | |
1da177e4 | 6725 | if (!rdev) |
1ca69c4b N |
6726 | err = -ENODEV; |
6727 | else { | |
6728 | md_error(mddev, rdev); | |
6729 | if (!test_bit(Faulty, &rdev->flags)) | |
6730 | err = -EBUSY; | |
6731 | } | |
6732 | rcu_read_unlock(); | |
6733 | return err; | |
1da177e4 LT |
6734 | } |
6735 | ||
2f9618ce AN |
6736 | /* |
6737 | * We have a problem here : there is no easy way to give a CHS | |
6738 | * virtual geometry. We currently pretend that we have a 2 heads | |
6739 | * 4 sectors (with a BIG number of cylinders...). This drives | |
6740 | * dosfs just mad... ;-) | |
6741 | */ | |
a885c8c4 CH |
6742 | static int md_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
6743 | { | |
fd01b88c | 6744 | struct mddev *mddev = bdev->bd_disk->private_data; |
a885c8c4 CH |
6745 | |
6746 | geo->heads = 2; | |
6747 | geo->sectors = 4; | |
49ce6cea | 6748 | geo->cylinders = mddev->array_sectors / 8; |
a885c8c4 CH |
6749 | return 0; |
6750 | } | |
6751 | ||
cb335f88 NS |
6752 | static inline bool md_ioctl_valid(unsigned int cmd) |
6753 | { | |
6754 | switch (cmd) { | |
6755 | case ADD_NEW_DISK: | |
6756 | case BLKROSET: | |
6757 | case GET_ARRAY_INFO: | |
6758 | case GET_BITMAP_FILE: | |
6759 | case GET_DISK_INFO: | |
6760 | case HOT_ADD_DISK: | |
6761 | case HOT_REMOVE_DISK: | |
cb335f88 NS |
6762 | case RAID_AUTORUN: |
6763 | case RAID_VERSION: | |
6764 | case RESTART_ARRAY_RW: | |
6765 | case RUN_ARRAY: | |
6766 | case SET_ARRAY_INFO: | |
6767 | case SET_BITMAP_FILE: | |
6768 | case SET_DISK_FAULTY: | |
6769 | case STOP_ARRAY: | |
6770 | case STOP_ARRAY_RO: | |
1aee41f6 | 6771 | case CLUSTERED_DISK_NACK: |
cb335f88 NS |
6772 | return true; |
6773 | default: | |
6774 | return false; | |
6775 | } | |
6776 | } | |
6777 | ||
a39907fa | 6778 | static int md_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
6779 | unsigned int cmd, unsigned long arg) |
6780 | { | |
6781 | int err = 0; | |
6782 | void __user *argp = (void __user *)arg; | |
fd01b88c | 6783 | struct mddev *mddev = NULL; |
e2218350 | 6784 | int ro; |
1da177e4 | 6785 | |
cb335f88 NS |
6786 | if (!md_ioctl_valid(cmd)) |
6787 | return -ENOTTY; | |
6788 | ||
506c9e44 N |
6789 | switch (cmd) { |
6790 | case RAID_VERSION: | |
6791 | case GET_ARRAY_INFO: | |
6792 | case GET_DISK_INFO: | |
6793 | break; | |
6794 | default: | |
6795 | if (!capable(CAP_SYS_ADMIN)) | |
6796 | return -EACCES; | |
6797 | } | |
1da177e4 LT |
6798 | |
6799 | /* | |
6800 | * Commands dealing with the RAID driver but not any | |
6801 | * particular array: | |
6802 | */ | |
c02c0aeb N |
6803 | switch (cmd) { |
6804 | case RAID_VERSION: | |
6805 | err = get_version(argp); | |
3adc28d8 | 6806 | goto out; |
1da177e4 | 6807 | |
1da177e4 | 6808 | #ifndef MODULE |
c02c0aeb N |
6809 | case RAID_AUTORUN: |
6810 | err = 0; | |
6811 | autostart_arrays(arg); | |
3adc28d8 | 6812 | goto out; |
1da177e4 | 6813 | #endif |
c02c0aeb | 6814 | default:; |
1da177e4 LT |
6815 | } |
6816 | ||
6817 | /* | |
6818 | * Commands creating/starting a new array: | |
6819 | */ | |
6820 | ||
a39907fa | 6821 | mddev = bdev->bd_disk->private_data; |
1da177e4 LT |
6822 | |
6823 | if (!mddev) { | |
6824 | BUG(); | |
3adc28d8 | 6825 | goto out; |
1da177e4 LT |
6826 | } |
6827 | ||
1ca69c4b N |
6828 | /* Some actions do not requires the mutex */ |
6829 | switch (cmd) { | |
6830 | case GET_ARRAY_INFO: | |
6831 | if (!mddev->raid_disks && !mddev->external) | |
6832 | err = -ENODEV; | |
6833 | else | |
6834 | err = get_array_info(mddev, argp); | |
3adc28d8 | 6835 | goto out; |
1ca69c4b N |
6836 | |
6837 | case GET_DISK_INFO: | |
6838 | if (!mddev->raid_disks && !mddev->external) | |
6839 | err = -ENODEV; | |
6840 | else | |
6841 | err = get_disk_info(mddev, argp); | |
3adc28d8 | 6842 | goto out; |
1ca69c4b N |
6843 | |
6844 | case SET_DISK_FAULTY: | |
6845 | err = set_disk_faulty(mddev, new_decode_dev(arg)); | |
3adc28d8 | 6846 | goto out; |
4af1a041 N |
6847 | |
6848 | case GET_BITMAP_FILE: | |
6849 | err = get_bitmap_file(mddev, argp); | |
6850 | goto out; | |
6851 | ||
1ca69c4b N |
6852 | } |
6853 | ||
a7a3f08d N |
6854 | if (cmd == ADD_NEW_DISK) |
6855 | /* need to ensure md_delayed_delete() has completed */ | |
6856 | flush_workqueue(md_misc_wq); | |
6857 | ||
90f5f7ad HR |
6858 | if (cmd == HOT_REMOVE_DISK) |
6859 | /* need to ensure recovery thread has run */ | |
6860 | wait_event_interruptible_timeout(mddev->sb_wait, | |
6861 | !test_bit(MD_RECOVERY_NEEDED, | |
82a301cb | 6862 | &mddev->recovery), |
90f5f7ad | 6863 | msecs_to_jiffies(5000)); |
260fa034 N |
6864 | if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) { |
6865 | /* Need to flush page cache, and ensure no-one else opens | |
6866 | * and writes | |
6867 | */ | |
6868 | mutex_lock(&mddev->open_mutex); | |
9ba3b7f5 | 6869 | if (mddev->pers && atomic_read(&mddev->openers) > 1) { |
260fa034 N |
6870 | mutex_unlock(&mddev->open_mutex); |
6871 | err = -EBUSY; | |
3adc28d8 | 6872 | goto out; |
260fa034 | 6873 | } |
af8d8e6f | 6874 | set_bit(MD_CLOSING, &mddev->flags); |
260fa034 N |
6875 | mutex_unlock(&mddev->open_mutex); |
6876 | sync_blockdev(bdev); | |
6877 | } | |
1da177e4 LT |
6878 | err = mddev_lock(mddev); |
6879 | if (err) { | |
9d48739e N |
6880 | pr_debug("md: ioctl lock interrupted, reason %d, cmd %d\n", |
6881 | err, cmd); | |
3adc28d8 | 6882 | goto out; |
1da177e4 LT |
6883 | } |
6884 | ||
c02c0aeb N |
6885 | if (cmd == SET_ARRAY_INFO) { |
6886 | mdu_array_info_t info; | |
6887 | if (!arg) | |
6888 | memset(&info, 0, sizeof(info)); | |
6889 | else if (copy_from_user(&info, argp, sizeof(info))) { | |
6890 | err = -EFAULT; | |
3adc28d8 | 6891 | goto unlock; |
c02c0aeb N |
6892 | } |
6893 | if (mddev->pers) { | |
6894 | err = update_array_info(mddev, &info); | |
6895 | if (err) { | |
9d48739e | 6896 | pr_warn("md: couldn't update array info. %d\n", err); |
3adc28d8 | 6897 | goto unlock; |
1da177e4 | 6898 | } |
3adc28d8 | 6899 | goto unlock; |
c02c0aeb N |
6900 | } |
6901 | if (!list_empty(&mddev->disks)) { | |
9d48739e | 6902 | pr_warn("md: array %s already has disks!\n", mdname(mddev)); |
c02c0aeb | 6903 | err = -EBUSY; |
3adc28d8 | 6904 | goto unlock; |
c02c0aeb N |
6905 | } |
6906 | if (mddev->raid_disks) { | |
9d48739e | 6907 | pr_warn("md: array %s already initialised!\n", mdname(mddev)); |
c02c0aeb | 6908 | err = -EBUSY; |
3adc28d8 | 6909 | goto unlock; |
c02c0aeb N |
6910 | } |
6911 | err = set_array_info(mddev, &info); | |
6912 | if (err) { | |
9d48739e | 6913 | pr_warn("md: couldn't set array info. %d\n", err); |
3adc28d8 | 6914 | goto unlock; |
c02c0aeb | 6915 | } |
3adc28d8 | 6916 | goto unlock; |
1da177e4 LT |
6917 | } |
6918 | ||
6919 | /* | |
6920 | * Commands querying/configuring an existing array: | |
6921 | */ | |
32a7627c | 6922 | /* if we are not initialised yet, only ADD_NEW_DISK, STOP_ARRAY, |
3f9d7b0d | 6923 | * RUN_ARRAY, and GET_ and SET_BITMAP_FILE are allowed */ |
a17184a9 N |
6924 | if ((!mddev->raid_disks && !mddev->external) |
6925 | && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY | |
6926 | && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE | |
6927 | && cmd != GET_BITMAP_FILE) { | |
1da177e4 | 6928 | err = -ENODEV; |
3adc28d8 | 6929 | goto unlock; |
1da177e4 LT |
6930 | } |
6931 | ||
6932 | /* | |
6933 | * Commands even a read-only array can execute: | |
6934 | */ | |
c02c0aeb | 6935 | switch (cmd) { |
c02c0aeb N |
6936 | case RESTART_ARRAY_RW: |
6937 | err = restart_array(mddev); | |
3adc28d8 | 6938 | goto unlock; |
1da177e4 | 6939 | |
c02c0aeb N |
6940 | case STOP_ARRAY: |
6941 | err = do_md_stop(mddev, 0, bdev); | |
3adc28d8 | 6942 | goto unlock; |
1da177e4 | 6943 | |
c02c0aeb N |
6944 | case STOP_ARRAY_RO: |
6945 | err = md_set_readonly(mddev, bdev); | |
3adc28d8 | 6946 | goto unlock; |
1da177e4 | 6947 | |
3ea8929d N |
6948 | case HOT_REMOVE_DISK: |
6949 | err = hot_remove_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 6950 | goto unlock; |
3ea8929d | 6951 | |
7ceb17e8 N |
6952 | case ADD_NEW_DISK: |
6953 | /* We can support ADD_NEW_DISK on read-only arrays | |
466ad292 | 6954 | * only if we are re-adding a preexisting device. |
7ceb17e8 N |
6955 | * So require mddev->pers and MD_DISK_SYNC. |
6956 | */ | |
6957 | if (mddev->pers) { | |
6958 | mdu_disk_info_t info; | |
6959 | if (copy_from_user(&info, argp, sizeof(info))) | |
6960 | err = -EFAULT; | |
6961 | else if (!(info.state & (1<<MD_DISK_SYNC))) | |
6962 | /* Need to clear read-only for this */ | |
6963 | break; | |
6964 | else | |
6965 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 6966 | goto unlock; |
7ceb17e8 N |
6967 | } |
6968 | break; | |
6969 | ||
c02c0aeb N |
6970 | case BLKROSET: |
6971 | if (get_user(ro, (int __user *)(arg))) { | |
6972 | err = -EFAULT; | |
3adc28d8 | 6973 | goto unlock; |
c02c0aeb N |
6974 | } |
6975 | err = -EINVAL; | |
e2218350 | 6976 | |
c02c0aeb N |
6977 | /* if the bdev is going readonly the value of mddev->ro |
6978 | * does not matter, no writes are coming | |
6979 | */ | |
6980 | if (ro) | |
3adc28d8 | 6981 | goto unlock; |
e2218350 | 6982 | |
c02c0aeb N |
6983 | /* are we are already prepared for writes? */ |
6984 | if (mddev->ro != 1) | |
3adc28d8 | 6985 | goto unlock; |
e2218350 | 6986 | |
c02c0aeb N |
6987 | /* transitioning to readauto need only happen for |
6988 | * arrays that call md_write_start | |
6989 | */ | |
6990 | if (mddev->pers) { | |
6991 | err = restart_array(mddev); | |
6992 | if (err == 0) { | |
6993 | mddev->ro = 2; | |
6994 | set_disk_ro(mddev->gendisk, 0); | |
e2218350 | 6995 | } |
c02c0aeb | 6996 | } |
3adc28d8 | 6997 | goto unlock; |
1da177e4 LT |
6998 | } |
6999 | ||
7000 | /* | |
7001 | * The remaining ioctls are changing the state of the | |
f91de92e | 7002 | * superblock, so we do not allow them on read-only arrays. |
1da177e4 | 7003 | */ |
326eb17d | 7004 | if (mddev->ro && mddev->pers) { |
f91de92e N |
7005 | if (mddev->ro == 2) { |
7006 | mddev->ro = 0; | |
00bcb4ac | 7007 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 7008 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f3378b48 N |
7009 | /* mddev_unlock will wake thread */ |
7010 | /* If a device failed while we were read-only, we | |
7011 | * need to make sure the metadata is updated now. | |
7012 | */ | |
2953079c | 7013 | if (test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) { |
f3378b48 N |
7014 | mddev_unlock(mddev); |
7015 | wait_event(mddev->sb_wait, | |
2953079c SL |
7016 | !test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags) && |
7017 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); | |
29f097c4 | 7018 | mddev_lock_nointr(mddev); |
f3378b48 | 7019 | } |
f91de92e N |
7020 | } else { |
7021 | err = -EROFS; | |
3adc28d8 | 7022 | goto unlock; |
f91de92e | 7023 | } |
1da177e4 LT |
7024 | } |
7025 | ||
c02c0aeb N |
7026 | switch (cmd) { |
7027 | case ADD_NEW_DISK: | |
1da177e4 | 7028 | { |
c02c0aeb N |
7029 | mdu_disk_info_t info; |
7030 | if (copy_from_user(&info, argp, sizeof(info))) | |
7031 | err = -EFAULT; | |
7032 | else | |
7033 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 7034 | goto unlock; |
c02c0aeb | 7035 | } |
1da177e4 | 7036 | |
1aee41f6 GR |
7037 | case CLUSTERED_DISK_NACK: |
7038 | if (mddev_is_clustered(mddev)) | |
7039 | md_cluster_ops->new_disk_ack(mddev, false); | |
7040 | else | |
7041 | err = -EINVAL; | |
7042 | goto unlock; | |
7043 | ||
c02c0aeb N |
7044 | case HOT_ADD_DISK: |
7045 | err = hot_add_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7046 | goto unlock; |
1da177e4 | 7047 | |
c02c0aeb N |
7048 | case RUN_ARRAY: |
7049 | err = do_md_run(mddev); | |
3adc28d8 | 7050 | goto unlock; |
1da177e4 | 7051 | |
c02c0aeb N |
7052 | case SET_BITMAP_FILE: |
7053 | err = set_bitmap_file(mddev, (int)arg); | |
3adc28d8 | 7054 | goto unlock; |
32a7627c | 7055 | |
c02c0aeb N |
7056 | default: |
7057 | err = -EINVAL; | |
3adc28d8 | 7058 | goto unlock; |
1da177e4 LT |
7059 | } |
7060 | ||
3adc28d8 | 7061 | unlock: |
d3374825 N |
7062 | if (mddev->hold_active == UNTIL_IOCTL && |
7063 | err != -EINVAL) | |
7064 | mddev->hold_active = 0; | |
1da177e4 | 7065 | mddev_unlock(mddev); |
3adc28d8 | 7066 | out: |
1da177e4 LT |
7067 | return err; |
7068 | } | |
aa98aa31 AB |
7069 | #ifdef CONFIG_COMPAT |
7070 | static int md_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
7071 | unsigned int cmd, unsigned long arg) | |
7072 | { | |
7073 | switch (cmd) { | |
7074 | case HOT_REMOVE_DISK: | |
7075 | case HOT_ADD_DISK: | |
7076 | case SET_DISK_FAULTY: | |
7077 | case SET_BITMAP_FILE: | |
7078 | /* These take in integer arg, do not convert */ | |
7079 | break; | |
7080 | default: | |
7081 | arg = (unsigned long)compat_ptr(arg); | |
7082 | break; | |
7083 | } | |
7084 | ||
7085 | return md_ioctl(bdev, mode, cmd, arg); | |
7086 | } | |
7087 | #endif /* CONFIG_COMPAT */ | |
1da177e4 | 7088 | |
a39907fa | 7089 | static int md_open(struct block_device *bdev, fmode_t mode) |
1da177e4 LT |
7090 | { |
7091 | /* | |
7092 | * Succeed if we can lock the mddev, which confirms that | |
7093 | * it isn't being stopped right now. | |
7094 | */ | |
fd01b88c | 7095 | struct mddev *mddev = mddev_find(bdev->bd_dev); |
1da177e4 LT |
7096 | int err; |
7097 | ||
0c098220 YL |
7098 | if (!mddev) |
7099 | return -ENODEV; | |
7100 | ||
d3374825 N |
7101 | if (mddev->gendisk != bdev->bd_disk) { |
7102 | /* we are racing with mddev_put which is discarding this | |
7103 | * bd_disk. | |
7104 | */ | |
7105 | mddev_put(mddev); | |
7106 | /* Wait until bdev->bd_disk is definitely gone */ | |
e804ac78 | 7107 | flush_workqueue(md_misc_wq); |
d3374825 N |
7108 | /* Then retry the open from the top */ |
7109 | return -ERESTARTSYS; | |
7110 | } | |
7111 | BUG_ON(mddev != bdev->bd_disk->private_data); | |
7112 | ||
c8c00a69 | 7113 | if ((err = mutex_lock_interruptible(&mddev->open_mutex))) |
1da177e4 LT |
7114 | goto out; |
7115 | ||
af8d8e6f GJ |
7116 | if (test_bit(MD_CLOSING, &mddev->flags)) { |
7117 | mutex_unlock(&mddev->open_mutex); | |
e2342ca8 N |
7118 | err = -ENODEV; |
7119 | goto out; | |
af8d8e6f GJ |
7120 | } |
7121 | ||
1da177e4 | 7122 | err = 0; |
f2ea68cf | 7123 | atomic_inc(&mddev->openers); |
c8c00a69 | 7124 | mutex_unlock(&mddev->open_mutex); |
1da177e4 | 7125 | |
f0b4f7e2 | 7126 | check_disk_change(bdev); |
1da177e4 | 7127 | out: |
e2342ca8 N |
7128 | if (err) |
7129 | mddev_put(mddev); | |
1da177e4 LT |
7130 | return err; |
7131 | } | |
7132 | ||
db2a144b | 7133 | static void md_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 7134 | { |
f72ffdd6 | 7135 | struct mddev *mddev = disk->private_data; |
1da177e4 | 7136 | |
52e5f9d1 | 7137 | BUG_ON(!mddev); |
f2ea68cf | 7138 | atomic_dec(&mddev->openers); |
1da177e4 | 7139 | mddev_put(mddev); |
1da177e4 | 7140 | } |
f0b4f7e2 N |
7141 | |
7142 | static int md_media_changed(struct gendisk *disk) | |
7143 | { | |
fd01b88c | 7144 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7145 | |
7146 | return mddev->changed; | |
7147 | } | |
7148 | ||
7149 | static int md_revalidate(struct gendisk *disk) | |
7150 | { | |
fd01b88c | 7151 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7152 | |
7153 | mddev->changed = 0; | |
7154 | return 0; | |
7155 | } | |
83d5cde4 | 7156 | static const struct block_device_operations md_fops = |
1da177e4 LT |
7157 | { |
7158 | .owner = THIS_MODULE, | |
a39907fa AV |
7159 | .open = md_open, |
7160 | .release = md_release, | |
b492b852 | 7161 | .ioctl = md_ioctl, |
aa98aa31 AB |
7162 | #ifdef CONFIG_COMPAT |
7163 | .compat_ioctl = md_compat_ioctl, | |
7164 | #endif | |
a885c8c4 | 7165 | .getgeo = md_getgeo, |
f0b4f7e2 N |
7166 | .media_changed = md_media_changed, |
7167 | .revalidate_disk= md_revalidate, | |
1da177e4 LT |
7168 | }; |
7169 | ||
f72ffdd6 | 7170 | static int md_thread(void *arg) |
1da177e4 | 7171 | { |
2b8bf345 | 7172 | struct md_thread *thread = arg; |
1da177e4 | 7173 | |
1da177e4 LT |
7174 | /* |
7175 | * md_thread is a 'system-thread', it's priority should be very | |
7176 | * high. We avoid resource deadlocks individually in each | |
7177 | * raid personality. (RAID5 does preallocation) We also use RR and | |
7178 | * the very same RT priority as kswapd, thus we will never get | |
7179 | * into a priority inversion deadlock. | |
7180 | * | |
7181 | * we definitely have to have equal or higher priority than | |
7182 | * bdflush, otherwise bdflush will deadlock if there are too | |
7183 | * many dirty RAID5 blocks. | |
7184 | */ | |
1da177e4 | 7185 | |
6985c43f | 7186 | allow_signal(SIGKILL); |
a6fb0934 | 7187 | while (!kthread_should_stop()) { |
1da177e4 | 7188 | |
93588e22 N |
7189 | /* We need to wait INTERRUPTIBLE so that |
7190 | * we don't add to the load-average. | |
7191 | * That means we need to be sure no signals are | |
7192 | * pending | |
7193 | */ | |
7194 | if (signal_pending(current)) | |
7195 | flush_signals(current); | |
7196 | ||
7197 | wait_event_interruptible_timeout | |
7198 | (thread->wqueue, | |
7199 | test_bit(THREAD_WAKEUP, &thread->flags) | |
ce1ccd07 | 7200 | || kthread_should_stop() || kthread_should_park(), |
93588e22 | 7201 | thread->timeout); |
1da177e4 | 7202 | |
6c987910 | 7203 | clear_bit(THREAD_WAKEUP, &thread->flags); |
ce1ccd07 SL |
7204 | if (kthread_should_park()) |
7205 | kthread_parkme(); | |
6c987910 | 7206 | if (!kthread_should_stop()) |
4ed8731d | 7207 | thread->run(thread); |
1da177e4 | 7208 | } |
a6fb0934 | 7209 | |
1da177e4 LT |
7210 | return 0; |
7211 | } | |
7212 | ||
2b8bf345 | 7213 | void md_wakeup_thread(struct md_thread *thread) |
1da177e4 LT |
7214 | { |
7215 | if (thread) { | |
36a4e1fe | 7216 | pr_debug("md: waking up MD thread %s.\n", thread->tsk->comm); |
1da177e4 LT |
7217 | set_bit(THREAD_WAKEUP, &thread->flags); |
7218 | wake_up(&thread->wqueue); | |
7219 | } | |
7220 | } | |
6c144d31 | 7221 | EXPORT_SYMBOL(md_wakeup_thread); |
1da177e4 | 7222 | |
4ed8731d SL |
7223 | struct md_thread *md_register_thread(void (*run) (struct md_thread *), |
7224 | struct mddev *mddev, const char *name) | |
1da177e4 | 7225 | { |
2b8bf345 | 7226 | struct md_thread *thread; |
1da177e4 | 7227 | |
2b8bf345 | 7228 | thread = kzalloc(sizeof(struct md_thread), GFP_KERNEL); |
1da177e4 LT |
7229 | if (!thread) |
7230 | return NULL; | |
7231 | ||
1da177e4 LT |
7232 | init_waitqueue_head(&thread->wqueue); |
7233 | ||
1da177e4 LT |
7234 | thread->run = run; |
7235 | thread->mddev = mddev; | |
32a7627c | 7236 | thread->timeout = MAX_SCHEDULE_TIMEOUT; |
0da3c619 N |
7237 | thread->tsk = kthread_run(md_thread, thread, |
7238 | "%s_%s", | |
7239 | mdname(thread->mddev), | |
0232605d | 7240 | name); |
a6fb0934 | 7241 | if (IS_ERR(thread->tsk)) { |
1da177e4 LT |
7242 | kfree(thread); |
7243 | return NULL; | |
7244 | } | |
1da177e4 LT |
7245 | return thread; |
7246 | } | |
6c144d31 | 7247 | EXPORT_SYMBOL(md_register_thread); |
1da177e4 | 7248 | |
2b8bf345 | 7249 | void md_unregister_thread(struct md_thread **threadp) |
1da177e4 | 7250 | { |
2b8bf345 | 7251 | struct md_thread *thread = *threadp; |
e0cf8f04 N |
7252 | if (!thread) |
7253 | return; | |
36a4e1fe | 7254 | pr_debug("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk)); |
01f96c0a N |
7255 | /* Locking ensures that mddev_unlock does not wake_up a |
7256 | * non-existent thread | |
7257 | */ | |
7258 | spin_lock(&pers_lock); | |
7259 | *threadp = NULL; | |
7260 | spin_unlock(&pers_lock); | |
a6fb0934 N |
7261 | |
7262 | kthread_stop(thread->tsk); | |
1da177e4 LT |
7263 | kfree(thread); |
7264 | } | |
6c144d31 | 7265 | EXPORT_SYMBOL(md_unregister_thread); |
1da177e4 | 7266 | |
fd01b88c | 7267 | void md_error(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 7268 | { |
b2d444d7 | 7269 | if (!rdev || test_bit(Faulty, &rdev->flags)) |
1da177e4 | 7270 | return; |
6bfe0b49 | 7271 | |
de393cde | 7272 | if (!mddev->pers || !mddev->pers->error_handler) |
1da177e4 LT |
7273 | return; |
7274 | mddev->pers->error_handler(mddev,rdev); | |
72a23c21 NB |
7275 | if (mddev->degraded) |
7276 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
00bcb4ac | 7277 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
7278 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
7279 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7280 | md_wakeup_thread(mddev->thread); | |
768a418d | 7281 | if (mddev->event_work.func) |
e804ac78 | 7282 | queue_work(md_misc_wq, &mddev->event_work); |
bb9ef716 | 7283 | md_new_event(mddev); |
1da177e4 | 7284 | } |
6c144d31 | 7285 | EXPORT_SYMBOL(md_error); |
1da177e4 LT |
7286 | |
7287 | /* seq_file implementation /proc/mdstat */ | |
7288 | ||
7289 | static void status_unused(struct seq_file *seq) | |
7290 | { | |
7291 | int i = 0; | |
3cb03002 | 7292 | struct md_rdev *rdev; |
1da177e4 LT |
7293 | |
7294 | seq_printf(seq, "unused devices: "); | |
7295 | ||
159ec1fc | 7296 | list_for_each_entry(rdev, &pending_raid_disks, same_set) { |
1da177e4 LT |
7297 | char b[BDEVNAME_SIZE]; |
7298 | i++; | |
7299 | seq_printf(seq, "%s ", | |
7300 | bdevname(rdev->bdev,b)); | |
7301 | } | |
7302 | if (!i) | |
7303 | seq_printf(seq, "<none>"); | |
7304 | ||
7305 | seq_printf(seq, "\n"); | |
7306 | } | |
7307 | ||
f7851be7 | 7308 | static int status_resync(struct seq_file *seq, struct mddev *mddev) |
1da177e4 | 7309 | { |
dd71cf6b N |
7310 | sector_t max_sectors, resync, res; |
7311 | unsigned long dt, db; | |
7312 | sector_t rt; | |
4588b42e N |
7313 | int scale; |
7314 | unsigned int per_milli; | |
1da177e4 | 7315 | |
c804cdec N |
7316 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
7317 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
dd71cf6b | 7318 | max_sectors = mddev->resync_max_sectors; |
1da177e4 | 7319 | else |
dd71cf6b | 7320 | max_sectors = mddev->dev_sectors; |
1da177e4 | 7321 | |
f7851be7 N |
7322 | resync = mddev->curr_resync; |
7323 | if (resync <= 3) { | |
7324 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) | |
7325 | /* Still cleaning up */ | |
7326 | resync = max_sectors; | |
7327 | } else | |
7328 | resync -= atomic_read(&mddev->recovery_active); | |
7329 | ||
7330 | if (resync == 0) { | |
7331 | if (mddev->recovery_cp < MaxSector) { | |
7332 | seq_printf(seq, "\tresync=PENDING"); | |
7333 | return 1; | |
7334 | } | |
7335 | return 0; | |
7336 | } | |
7337 | if (resync < 3) { | |
7338 | seq_printf(seq, "\tresync=DELAYED"); | |
7339 | return 1; | |
7340 | } | |
7341 | ||
403df478 | 7342 | WARN_ON(max_sectors == 0); |
4588b42e | 7343 | /* Pick 'scale' such that (resync>>scale)*1000 will fit |
dd71cf6b | 7344 | * in a sector_t, and (max_sectors>>scale) will fit in a |
4588b42e N |
7345 | * u32, as those are the requirements for sector_div. |
7346 | * Thus 'scale' must be at least 10 | |
7347 | */ | |
7348 | scale = 10; | |
7349 | if (sizeof(sector_t) > sizeof(unsigned long)) { | |
dd71cf6b | 7350 | while ( max_sectors/2 > (1ULL<<(scale+32))) |
4588b42e N |
7351 | scale++; |
7352 | } | |
7353 | res = (resync>>scale)*1000; | |
dd71cf6b | 7354 | sector_div(res, (u32)((max_sectors>>scale)+1)); |
4588b42e N |
7355 | |
7356 | per_milli = res; | |
1da177e4 | 7357 | { |
4588b42e | 7358 | int i, x = per_milli/50, y = 20-x; |
1da177e4 LT |
7359 | seq_printf(seq, "["); |
7360 | for (i = 0; i < x; i++) | |
7361 | seq_printf(seq, "="); | |
7362 | seq_printf(seq, ">"); | |
7363 | for (i = 0; i < y; i++) | |
7364 | seq_printf(seq, "."); | |
7365 | seq_printf(seq, "] "); | |
7366 | } | |
4588b42e | 7367 | seq_printf(seq, " %s =%3u.%u%% (%llu/%llu)", |
ccfcc3c1 N |
7368 | (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)? |
7369 | "reshape" : | |
61df9d91 N |
7370 | (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)? |
7371 | "check" : | |
7372 | (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? | |
7373 | "resync" : "recovery"))), | |
7374 | per_milli/10, per_milli % 10, | |
dd71cf6b N |
7375 | (unsigned long long) resync/2, |
7376 | (unsigned long long) max_sectors/2); | |
1da177e4 LT |
7377 | |
7378 | /* | |
1da177e4 LT |
7379 | * dt: time from mark until now |
7380 | * db: blocks written from mark until now | |
7381 | * rt: remaining time | |
dd71cf6b N |
7382 | * |
7383 | * rt is a sector_t, so could be 32bit or 64bit. | |
7384 | * So we divide before multiply in case it is 32bit and close | |
7385 | * to the limit. | |
25985edc | 7386 | * We scale the divisor (db) by 32 to avoid losing precision |
dd71cf6b N |
7387 | * near the end of resync when the number of remaining sectors |
7388 | * is close to 'db'. | |
7389 | * We then divide rt by 32 after multiplying by db to compensate. | |
7390 | * The '+1' avoids division by zero if db is very small. | |
1da177e4 LT |
7391 | */ |
7392 | dt = ((jiffies - mddev->resync_mark) / HZ); | |
7393 | if (!dt) dt++; | |
ff4e8d9a N |
7394 | db = (mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active)) |
7395 | - mddev->resync_mark_cnt; | |
1da177e4 | 7396 | |
dd71cf6b N |
7397 | rt = max_sectors - resync; /* number of remaining sectors */ |
7398 | sector_div(rt, db/32+1); | |
7399 | rt *= dt; | |
7400 | rt >>= 5; | |
7401 | ||
7402 | seq_printf(seq, " finish=%lu.%lumin", (unsigned long)rt / 60, | |
7403 | ((unsigned long)rt % 60)/6); | |
1da177e4 | 7404 | |
ff4e8d9a | 7405 | seq_printf(seq, " speed=%ldK/sec", db/2/dt); |
f7851be7 | 7406 | return 1; |
1da177e4 LT |
7407 | } |
7408 | ||
7409 | static void *md_seq_start(struct seq_file *seq, loff_t *pos) | |
7410 | { | |
7411 | struct list_head *tmp; | |
7412 | loff_t l = *pos; | |
fd01b88c | 7413 | struct mddev *mddev; |
1da177e4 LT |
7414 | |
7415 | if (l >= 0x10000) | |
7416 | return NULL; | |
7417 | if (!l--) | |
7418 | /* header */ | |
7419 | return (void*)1; | |
7420 | ||
7421 | spin_lock(&all_mddevs_lock); | |
7422 | list_for_each(tmp,&all_mddevs) | |
7423 | if (!l--) { | |
fd01b88c | 7424 | mddev = list_entry(tmp, struct mddev, all_mddevs); |
1da177e4 LT |
7425 | mddev_get(mddev); |
7426 | spin_unlock(&all_mddevs_lock); | |
7427 | return mddev; | |
7428 | } | |
7429 | spin_unlock(&all_mddevs_lock); | |
7430 | if (!l--) | |
7431 | return (void*)2;/* tail */ | |
7432 | return NULL; | |
7433 | } | |
7434 | ||
7435 | static void *md_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
7436 | { | |
7437 | struct list_head *tmp; | |
fd01b88c | 7438 | struct mddev *next_mddev, *mddev = v; |
f72ffdd6 | 7439 | |
1da177e4 LT |
7440 | ++*pos; |
7441 | if (v == (void*)2) | |
7442 | return NULL; | |
7443 | ||
7444 | spin_lock(&all_mddevs_lock); | |
7445 | if (v == (void*)1) | |
7446 | tmp = all_mddevs.next; | |
7447 | else | |
7448 | tmp = mddev->all_mddevs.next; | |
7449 | if (tmp != &all_mddevs) | |
fd01b88c | 7450 | next_mddev = mddev_get(list_entry(tmp,struct mddev,all_mddevs)); |
1da177e4 LT |
7451 | else { |
7452 | next_mddev = (void*)2; | |
7453 | *pos = 0x10000; | |
f72ffdd6 | 7454 | } |
1da177e4 LT |
7455 | spin_unlock(&all_mddevs_lock); |
7456 | ||
7457 | if (v != (void*)1) | |
7458 | mddev_put(mddev); | |
7459 | return next_mddev; | |
7460 | ||
7461 | } | |
7462 | ||
7463 | static void md_seq_stop(struct seq_file *seq, void *v) | |
7464 | { | |
fd01b88c | 7465 | struct mddev *mddev = v; |
1da177e4 LT |
7466 | |
7467 | if (mddev && v != (void*)1 && v != (void*)2) | |
7468 | mddev_put(mddev); | |
7469 | } | |
7470 | ||
7471 | static int md_seq_show(struct seq_file *seq, void *v) | |
7472 | { | |
fd01b88c | 7473 | struct mddev *mddev = v; |
dd8ac336 | 7474 | sector_t sectors; |
3cb03002 | 7475 | struct md_rdev *rdev; |
1da177e4 LT |
7476 | |
7477 | if (v == (void*)1) { | |
84fc4b56 | 7478 | struct md_personality *pers; |
1da177e4 LT |
7479 | seq_printf(seq, "Personalities : "); |
7480 | spin_lock(&pers_lock); | |
2604b703 N |
7481 | list_for_each_entry(pers, &pers_list, list) |
7482 | seq_printf(seq, "[%s] ", pers->name); | |
1da177e4 LT |
7483 | |
7484 | spin_unlock(&pers_lock); | |
7485 | seq_printf(seq, "\n"); | |
f1514638 | 7486 | seq->poll_event = atomic_read(&md_event_count); |
1da177e4 LT |
7487 | return 0; |
7488 | } | |
7489 | if (v == (void*)2) { | |
7490 | status_unused(seq); | |
7491 | return 0; | |
7492 | } | |
7493 | ||
36d091f4 | 7494 | spin_lock(&mddev->lock); |
1da177e4 LT |
7495 | if (mddev->pers || mddev->raid_disks || !list_empty(&mddev->disks)) { |
7496 | seq_printf(seq, "%s : %sactive", mdname(mddev), | |
7497 | mddev->pers ? "" : "in"); | |
7498 | if (mddev->pers) { | |
f91de92e | 7499 | if (mddev->ro==1) |
1da177e4 | 7500 | seq_printf(seq, " (read-only)"); |
f91de92e | 7501 | if (mddev->ro==2) |
52720ae7 | 7502 | seq_printf(seq, " (auto-read-only)"); |
1da177e4 LT |
7503 | seq_printf(seq, " %s", mddev->pers->name); |
7504 | } | |
7505 | ||
dd8ac336 | 7506 | sectors = 0; |
f97fcad3 N |
7507 | rcu_read_lock(); |
7508 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 LT |
7509 | char b[BDEVNAME_SIZE]; |
7510 | seq_printf(seq, " %s[%d]", | |
7511 | bdevname(rdev->bdev,b), rdev->desc_nr); | |
8ddf9efe N |
7512 | if (test_bit(WriteMostly, &rdev->flags)) |
7513 | seq_printf(seq, "(W)"); | |
9efdca16 SL |
7514 | if (test_bit(Journal, &rdev->flags)) |
7515 | seq_printf(seq, "(J)"); | |
b2d444d7 | 7516 | if (test_bit(Faulty, &rdev->flags)) { |
1da177e4 LT |
7517 | seq_printf(seq, "(F)"); |
7518 | continue; | |
2d78f8c4 N |
7519 | } |
7520 | if (rdev->raid_disk < 0) | |
b325a32e | 7521 | seq_printf(seq, "(S)"); /* spare */ |
2d78f8c4 N |
7522 | if (test_bit(Replacement, &rdev->flags)) |
7523 | seq_printf(seq, "(R)"); | |
dd8ac336 | 7524 | sectors += rdev->sectors; |
1da177e4 | 7525 | } |
f97fcad3 | 7526 | rcu_read_unlock(); |
1da177e4 LT |
7527 | |
7528 | if (!list_empty(&mddev->disks)) { | |
7529 | if (mddev->pers) | |
7530 | seq_printf(seq, "\n %llu blocks", | |
f233ea5c AN |
7531 | (unsigned long long) |
7532 | mddev->array_sectors / 2); | |
1da177e4 LT |
7533 | else |
7534 | seq_printf(seq, "\n %llu blocks", | |
dd8ac336 | 7535 | (unsigned long long)sectors / 2); |
1da177e4 | 7536 | } |
1cd6bf19 N |
7537 | if (mddev->persistent) { |
7538 | if (mddev->major_version != 0 || | |
7539 | mddev->minor_version != 90) { | |
7540 | seq_printf(seq," super %d.%d", | |
7541 | mddev->major_version, | |
7542 | mddev->minor_version); | |
7543 | } | |
e691063a N |
7544 | } else if (mddev->external) |
7545 | seq_printf(seq, " super external:%s", | |
7546 | mddev->metadata_type); | |
7547 | else | |
1cd6bf19 | 7548 | seq_printf(seq, " super non-persistent"); |
1da177e4 LT |
7549 | |
7550 | if (mddev->pers) { | |
d710e138 | 7551 | mddev->pers->status(seq, mddev); |
f72ffdd6 | 7552 | seq_printf(seq, "\n "); |
8e1b39d6 | 7553 | if (mddev->pers->sync_request) { |
f7851be7 | 7554 | if (status_resync(seq, mddev)) |
8e1b39d6 | 7555 | seq_printf(seq, "\n "); |
8e1b39d6 | 7556 | } |
32a7627c N |
7557 | } else |
7558 | seq_printf(seq, "\n "); | |
7559 | ||
57148964 | 7560 | bitmap_status(seq, mddev->bitmap); |
1da177e4 LT |
7561 | |
7562 | seq_printf(seq, "\n"); | |
7563 | } | |
36d091f4 | 7564 | spin_unlock(&mddev->lock); |
f72ffdd6 | 7565 | |
1da177e4 LT |
7566 | return 0; |
7567 | } | |
7568 | ||
110518bc | 7569 | static const struct seq_operations md_seq_ops = { |
1da177e4 LT |
7570 | .start = md_seq_start, |
7571 | .next = md_seq_next, | |
7572 | .stop = md_seq_stop, | |
7573 | .show = md_seq_show, | |
7574 | }; | |
7575 | ||
7576 | static int md_seq_open(struct inode *inode, struct file *file) | |
7577 | { | |
f1514638 | 7578 | struct seq_file *seq; |
1da177e4 LT |
7579 | int error; |
7580 | ||
7581 | error = seq_open(file, &md_seq_ops); | |
d7603b7e | 7582 | if (error) |
f1514638 KS |
7583 | return error; |
7584 | ||
7585 | seq = file->private_data; | |
7586 | seq->poll_event = atomic_read(&md_event_count); | |
1da177e4 LT |
7587 | return error; |
7588 | } | |
7589 | ||
e2f23b60 | 7590 | static int md_unloading; |
d7603b7e N |
7591 | static unsigned int mdstat_poll(struct file *filp, poll_table *wait) |
7592 | { | |
f1514638 | 7593 | struct seq_file *seq = filp->private_data; |
d7603b7e N |
7594 | int mask; |
7595 | ||
e2f23b60 | 7596 | if (md_unloading) |
7d7e64f2 | 7597 | return POLLIN|POLLRDNORM|POLLERR|POLLPRI; |
d7603b7e N |
7598 | poll_wait(filp, &md_event_waiters, wait); |
7599 | ||
7600 | /* always allow read */ | |
7601 | mask = POLLIN | POLLRDNORM; | |
7602 | ||
f1514638 | 7603 | if (seq->poll_event != atomic_read(&md_event_count)) |
d7603b7e N |
7604 | mask |= POLLERR | POLLPRI; |
7605 | return mask; | |
7606 | } | |
7607 | ||
fa027c2a | 7608 | static const struct file_operations md_seq_fops = { |
e24650c2 | 7609 | .owner = THIS_MODULE, |
1da177e4 LT |
7610 | .open = md_seq_open, |
7611 | .read = seq_read, | |
7612 | .llseek = seq_lseek, | |
c3f94b40 | 7613 | .release = seq_release_private, |
d7603b7e | 7614 | .poll = mdstat_poll, |
1da177e4 LT |
7615 | }; |
7616 | ||
84fc4b56 | 7617 | int register_md_personality(struct md_personality *p) |
1da177e4 | 7618 | { |
9d48739e N |
7619 | pr_debug("md: %s personality registered for level %d\n", |
7620 | p->name, p->level); | |
1da177e4 | 7621 | spin_lock(&pers_lock); |
2604b703 | 7622 | list_add_tail(&p->list, &pers_list); |
1da177e4 LT |
7623 | spin_unlock(&pers_lock); |
7624 | return 0; | |
7625 | } | |
6c144d31 | 7626 | EXPORT_SYMBOL(register_md_personality); |
1da177e4 | 7627 | |
84fc4b56 | 7628 | int unregister_md_personality(struct md_personality *p) |
1da177e4 | 7629 | { |
9d48739e | 7630 | pr_debug("md: %s personality unregistered\n", p->name); |
1da177e4 | 7631 | spin_lock(&pers_lock); |
2604b703 | 7632 | list_del_init(&p->list); |
1da177e4 LT |
7633 | spin_unlock(&pers_lock); |
7634 | return 0; | |
7635 | } | |
6c144d31 | 7636 | EXPORT_SYMBOL(unregister_md_personality); |
1da177e4 | 7637 | |
6022e75b N |
7638 | int register_md_cluster_operations(struct md_cluster_operations *ops, |
7639 | struct module *module) | |
edb39c9d | 7640 | { |
6022e75b | 7641 | int ret = 0; |
edb39c9d | 7642 | spin_lock(&pers_lock); |
6022e75b N |
7643 | if (md_cluster_ops != NULL) |
7644 | ret = -EALREADY; | |
7645 | else { | |
7646 | md_cluster_ops = ops; | |
7647 | md_cluster_mod = module; | |
7648 | } | |
edb39c9d | 7649 | spin_unlock(&pers_lock); |
6022e75b | 7650 | return ret; |
edb39c9d GR |
7651 | } |
7652 | EXPORT_SYMBOL(register_md_cluster_operations); | |
7653 | ||
7654 | int unregister_md_cluster_operations(void) | |
7655 | { | |
7656 | spin_lock(&pers_lock); | |
7657 | md_cluster_ops = NULL; | |
7658 | spin_unlock(&pers_lock); | |
7659 | return 0; | |
7660 | } | |
7661 | EXPORT_SYMBOL(unregister_md_cluster_operations); | |
7662 | ||
7663 | int md_setup_cluster(struct mddev *mddev, int nodes) | |
7664 | { | |
47a7b0d8 GJ |
7665 | if (!md_cluster_ops) |
7666 | request_module("md-cluster"); | |
edb39c9d | 7667 | spin_lock(&pers_lock); |
47a7b0d8 | 7668 | /* ensure module won't be unloaded */ |
edb39c9d | 7669 | if (!md_cluster_ops || !try_module_get(md_cluster_mod)) { |
9d48739e | 7670 | pr_warn("can't find md-cluster module or get it's reference.\n"); |
edb39c9d GR |
7671 | spin_unlock(&pers_lock); |
7672 | return -ENOENT; | |
7673 | } | |
7674 | spin_unlock(&pers_lock); | |
7675 | ||
cf921cc1 | 7676 | return md_cluster_ops->join(mddev, nodes); |
edb39c9d GR |
7677 | } |
7678 | ||
7679 | void md_cluster_stop(struct mddev *mddev) | |
7680 | { | |
c4ce867f GR |
7681 | if (!md_cluster_ops) |
7682 | return; | |
edb39c9d GR |
7683 | md_cluster_ops->leave(mddev); |
7684 | module_put(md_cluster_mod); | |
7685 | } | |
7686 | ||
fd01b88c | 7687 | static int is_mddev_idle(struct mddev *mddev, int init) |
1da177e4 | 7688 | { |
f72ffdd6 | 7689 | struct md_rdev *rdev; |
1da177e4 | 7690 | int idle; |
eea1bf38 | 7691 | int curr_events; |
1da177e4 LT |
7692 | |
7693 | idle = 1; | |
4b80991c N |
7694 | rcu_read_lock(); |
7695 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 7696 | struct gendisk *disk = rdev->bdev->bd_contains->bd_disk; |
eea1bf38 N |
7697 | curr_events = (int)part_stat_read(&disk->part0, sectors[0]) + |
7698 | (int)part_stat_read(&disk->part0, sectors[1]) - | |
7699 | atomic_read(&disk->sync_io); | |
713f6ab1 N |
7700 | /* sync IO will cause sync_io to increase before the disk_stats |
7701 | * as sync_io is counted when a request starts, and | |
7702 | * disk_stats is counted when it completes. | |
7703 | * So resync activity will cause curr_events to be smaller than | |
7704 | * when there was no such activity. | |
7705 | * non-sync IO will cause disk_stat to increase without | |
7706 | * increasing sync_io so curr_events will (eventually) | |
7707 | * be larger than it was before. Once it becomes | |
7708 | * substantially larger, the test below will cause | |
7709 | * the array to appear non-idle, and resync will slow | |
7710 | * down. | |
7711 | * If there is a lot of outstanding resync activity when | |
7712 | * we set last_event to curr_events, then all that activity | |
7713 | * completing might cause the array to appear non-idle | |
7714 | * and resync will be slowed down even though there might | |
7715 | * not have been non-resync activity. This will only | |
7716 | * happen once though. 'last_events' will soon reflect | |
7717 | * the state where there is little or no outstanding | |
7718 | * resync requests, and further resync activity will | |
7719 | * always make curr_events less than last_events. | |
c0e48521 | 7720 | * |
1da177e4 | 7721 | */ |
eea1bf38 | 7722 | if (init || curr_events - rdev->last_events > 64) { |
1da177e4 LT |
7723 | rdev->last_events = curr_events; |
7724 | idle = 0; | |
7725 | } | |
7726 | } | |
4b80991c | 7727 | rcu_read_unlock(); |
1da177e4 LT |
7728 | return idle; |
7729 | } | |
7730 | ||
fd01b88c | 7731 | void md_done_sync(struct mddev *mddev, int blocks, int ok) |
1da177e4 LT |
7732 | { |
7733 | /* another "blocks" (512byte) blocks have been synced */ | |
7734 | atomic_sub(blocks, &mddev->recovery_active); | |
7735 | wake_up(&mddev->recovery_wait); | |
7736 | if (!ok) { | |
dfc70645 | 7737 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
0a19caab | 7738 | set_bit(MD_RECOVERY_ERROR, &mddev->recovery); |
1da177e4 LT |
7739 | md_wakeup_thread(mddev->thread); |
7740 | // stop recovery, signal do_sync .... | |
7741 | } | |
7742 | } | |
6c144d31 | 7743 | EXPORT_SYMBOL(md_done_sync); |
1da177e4 | 7744 | |
06d91a5f N |
7745 | /* md_write_start(mddev, bi) |
7746 | * If we need to update some array metadata (e.g. 'active' flag | |
3d310eb7 N |
7747 | * in superblock) before writing, schedule a superblock update |
7748 | * and wait for it to complete. | |
06d91a5f | 7749 | */ |
fd01b88c | 7750 | void md_write_start(struct mddev *mddev, struct bio *bi) |
1da177e4 | 7751 | { |
0fd62b86 | 7752 | int did_change = 0; |
06d91a5f | 7753 | if (bio_data_dir(bi) != WRITE) |
3d310eb7 | 7754 | return; |
06d91a5f | 7755 | |
f91de92e N |
7756 | BUG_ON(mddev->ro == 1); |
7757 | if (mddev->ro == 2) { | |
7758 | /* need to switch to read/write */ | |
7759 | mddev->ro = 0; | |
7760 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7761 | md_wakeup_thread(mddev->thread); | |
25156198 | 7762 | md_wakeup_thread(mddev->sync_thread); |
0fd62b86 | 7763 | did_change = 1; |
f91de92e | 7764 | } |
06d91a5f | 7765 | atomic_inc(&mddev->writes_pending); |
31a59e34 N |
7766 | if (mddev->safemode == 1) |
7767 | mddev->safemode = 0; | |
06d91a5f | 7768 | if (mddev->in_sync) { |
85572d7c | 7769 | spin_lock(&mddev->lock); |
3d310eb7 N |
7770 | if (mddev->in_sync) { |
7771 | mddev->in_sync = 0; | |
2953079c SL |
7772 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
7773 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
3d310eb7 | 7774 | md_wakeup_thread(mddev->thread); |
0fd62b86 | 7775 | did_change = 1; |
3d310eb7 | 7776 | } |
85572d7c | 7777 | spin_unlock(&mddev->lock); |
06d91a5f | 7778 | } |
0fd62b86 | 7779 | if (did_change) |
00bcb4ac | 7780 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
09a44cc1 | 7781 | wait_event(mddev->sb_wait, |
2953079c | 7782 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
1da177e4 | 7783 | } |
6c144d31 | 7784 | EXPORT_SYMBOL(md_write_start); |
1da177e4 | 7785 | |
fd01b88c | 7786 | void md_write_end(struct mddev *mddev) |
1da177e4 LT |
7787 | { |
7788 | if (atomic_dec_and_test(&mddev->writes_pending)) { | |
7789 | if (mddev->safemode == 2) | |
7790 | md_wakeup_thread(mddev->thread); | |
16f17b39 | 7791 | else if (mddev->safemode_delay) |
1da177e4 LT |
7792 | mod_timer(&mddev->safemode_timer, jiffies + mddev->safemode_delay); |
7793 | } | |
7794 | } | |
6c144d31 | 7795 | EXPORT_SYMBOL(md_write_end); |
1da177e4 | 7796 | |
2a2275d6 N |
7797 | /* md_allow_write(mddev) |
7798 | * Calling this ensures that the array is marked 'active' so that writes | |
7799 | * may proceed without blocking. It is important to call this before | |
7800 | * attempting a GFP_KERNEL allocation while holding the mddev lock. | |
7801 | * Must be called with mddev_lock held. | |
b5470dc5 | 7802 | * |
2953079c | 7803 | * In the ->external case MD_SB_CHANGE_PENDING can not be cleared until mddev->lock |
b5470dc5 | 7804 | * is dropped, so return -EAGAIN after notifying userspace. |
2a2275d6 | 7805 | */ |
fd01b88c | 7806 | int md_allow_write(struct mddev *mddev) |
2a2275d6 N |
7807 | { |
7808 | if (!mddev->pers) | |
b5470dc5 | 7809 | return 0; |
2a2275d6 | 7810 | if (mddev->ro) |
b5470dc5 | 7811 | return 0; |
1a0fd497 | 7812 | if (!mddev->pers->sync_request) |
b5470dc5 | 7813 | return 0; |
2a2275d6 | 7814 | |
85572d7c | 7815 | spin_lock(&mddev->lock); |
2a2275d6 N |
7816 | if (mddev->in_sync) { |
7817 | mddev->in_sync = 0; | |
2953079c SL |
7818 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
7819 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
2a2275d6 N |
7820 | if (mddev->safemode_delay && |
7821 | mddev->safemode == 0) | |
7822 | mddev->safemode = 1; | |
85572d7c | 7823 | spin_unlock(&mddev->lock); |
2a2275d6 | 7824 | md_update_sb(mddev, 0); |
00bcb4ac | 7825 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
2a2275d6 | 7826 | } else |
85572d7c | 7827 | spin_unlock(&mddev->lock); |
b5470dc5 | 7828 | |
2953079c | 7829 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
b5470dc5 DW |
7830 | return -EAGAIN; |
7831 | else | |
7832 | return 0; | |
2a2275d6 N |
7833 | } |
7834 | EXPORT_SYMBOL_GPL(md_allow_write); | |
7835 | ||
1da177e4 LT |
7836 | #define SYNC_MARKS 10 |
7837 | #define SYNC_MARK_STEP (3*HZ) | |
54f89341 | 7838 | #define UPDATE_FREQUENCY (5*60*HZ) |
4ed8731d | 7839 | void md_do_sync(struct md_thread *thread) |
1da177e4 | 7840 | { |
4ed8731d | 7841 | struct mddev *mddev = thread->mddev; |
fd01b88c | 7842 | struct mddev *mddev2; |
1da177e4 LT |
7843 | unsigned int currspeed = 0, |
7844 | window; | |
ac7e50a3 | 7845 | sector_t max_sectors,j, io_sectors, recovery_done; |
1da177e4 | 7846 | unsigned long mark[SYNC_MARKS]; |
54f89341 | 7847 | unsigned long update_time; |
1da177e4 LT |
7848 | sector_t mark_cnt[SYNC_MARKS]; |
7849 | int last_mark,m; | |
7850 | struct list_head *tmp; | |
7851 | sector_t last_check; | |
57afd89f | 7852 | int skipped = 0; |
3cb03002 | 7853 | struct md_rdev *rdev; |
c4a39551 | 7854 | char *desc, *action = NULL; |
7c2c57c9 | 7855 | struct blk_plug plug; |
41a9a0dc | 7856 | int ret; |
1da177e4 LT |
7857 | |
7858 | /* just incase thread restarts... */ | |
7859 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) | |
7860 | return; | |
3991b31e N |
7861 | if (mddev->ro) {/* never try to sync a read-only array */ |
7862 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
5fd6c1dc | 7863 | return; |
3991b31e | 7864 | } |
1da177e4 | 7865 | |
41a9a0dc GJ |
7866 | if (mddev_is_clustered(mddev)) { |
7867 | ret = md_cluster_ops->resync_start(mddev); | |
7868 | if (ret) | |
7869 | goto skip; | |
7870 | ||
bb8bf15b | 7871 | set_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags); |
41a9a0dc GJ |
7872 | if (!(test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
7873 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) || | |
7874 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) | |
7875 | && ((unsigned long long)mddev->curr_resync_completed | |
7876 | < (unsigned long long)mddev->resync_max_sectors)) | |
7877 | goto skip; | |
7878 | } | |
7879 | ||
61df9d91 | 7880 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
c4a39551 | 7881 | if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) { |
61df9d91 | 7882 | desc = "data-check"; |
c4a39551 JB |
7883 | action = "check"; |
7884 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
61df9d91 | 7885 | desc = "requested-resync"; |
c4a39551 JB |
7886 | action = "repair"; |
7887 | } else | |
61df9d91 N |
7888 | desc = "resync"; |
7889 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
7890 | desc = "reshape"; | |
7891 | else | |
7892 | desc = "recovery"; | |
7893 | ||
c4a39551 JB |
7894 | mddev->last_sync_action = action ?: desc; |
7895 | ||
1da177e4 LT |
7896 | /* we overload curr_resync somewhat here. |
7897 | * 0 == not engaged in resync at all | |
7898 | * 2 == checking that there is no conflict with another sync | |
7899 | * 1 == like 2, but have yielded to allow conflicting resync to | |
7900 | * commense | |
7901 | * other == active in resync - this many blocks | |
7902 | * | |
7903 | * Before starting a resync we must have set curr_resync to | |
7904 | * 2, and then checked that every "conflicting" array has curr_resync | |
7905 | * less than ours. When we find one that is the same or higher | |
7906 | * we wait on resync_wait. To avoid deadlock, we reduce curr_resync | |
7907 | * to 1 if we choose to yield (based arbitrarily on address of mddev structure). | |
7908 | * This will mean we have to start checking from the beginning again. | |
7909 | * | |
7910 | */ | |
7911 | ||
7912 | do { | |
c622ca54 | 7913 | int mddev2_minor = -1; |
1da177e4 LT |
7914 | mddev->curr_resync = 2; |
7915 | ||
7916 | try_again: | |
404e4b43 | 7917 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
1da177e4 | 7918 | goto skip; |
29ac4aa3 | 7919 | for_each_mddev(mddev2, tmp) { |
1da177e4 LT |
7920 | if (mddev2 == mddev) |
7921 | continue; | |
90b08710 BS |
7922 | if (!mddev->parallel_resync |
7923 | && mddev2->curr_resync | |
7924 | && match_mddev_units(mddev, mddev2)) { | |
1da177e4 LT |
7925 | DEFINE_WAIT(wq); |
7926 | if (mddev < mddev2 && mddev->curr_resync == 2) { | |
7927 | /* arbitrarily yield */ | |
7928 | mddev->curr_resync = 1; | |
7929 | wake_up(&resync_wait); | |
7930 | } | |
7931 | if (mddev > mddev2 && mddev->curr_resync == 1) | |
7932 | /* no need to wait here, we can wait the next | |
7933 | * time 'round when curr_resync == 2 | |
7934 | */ | |
7935 | continue; | |
9744197c N |
7936 | /* We need to wait 'interruptible' so as not to |
7937 | * contribute to the load average, and not to | |
7938 | * be caught by 'softlockup' | |
7939 | */ | |
7940 | prepare_to_wait(&resync_wait, &wq, TASK_INTERRUPTIBLE); | |
c91abf5a | 7941 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
8712e553 | 7942 | mddev2->curr_resync >= mddev->curr_resync) { |
c622ca54 AP |
7943 | if (mddev2_minor != mddev2->md_minor) { |
7944 | mddev2_minor = mddev2->md_minor; | |
9d48739e N |
7945 | pr_info("md: delaying %s of %s until %s has finished (they share one or more physical units)\n", |
7946 | desc, mdname(mddev), | |
7947 | mdname(mddev2)); | |
c622ca54 | 7948 | } |
1da177e4 | 7949 | mddev_put(mddev2); |
9744197c N |
7950 | if (signal_pending(current)) |
7951 | flush_signals(current); | |
1da177e4 LT |
7952 | schedule(); |
7953 | finish_wait(&resync_wait, &wq); | |
7954 | goto try_again; | |
7955 | } | |
7956 | finish_wait(&resync_wait, &wq); | |
7957 | } | |
7958 | } | |
7959 | } while (mddev->curr_resync < 2); | |
7960 | ||
5fd6c1dc | 7961 | j = 0; |
9d88883e | 7962 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
1da177e4 | 7963 | /* resync follows the size requested by the personality, |
57afd89f | 7964 | * which defaults to physical size, but can be virtual size |
1da177e4 LT |
7965 | */ |
7966 | max_sectors = mddev->resync_max_sectors; | |
7f7583d4 | 7967 | atomic64_set(&mddev->resync_mismatches, 0); |
5fd6c1dc | 7968 | /* we don't use the checkpoint if there's a bitmap */ |
5e96ee65 NB |
7969 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) |
7970 | j = mddev->resync_min; | |
7971 | else if (!mddev->bitmap) | |
5fd6c1dc | 7972 | j = mddev->recovery_cp; |
5e96ee65 | 7973 | |
ccfcc3c1 | 7974 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) |
c804cdec | 7975 | max_sectors = mddev->resync_max_sectors; |
5fd6c1dc | 7976 | else { |
1da177e4 | 7977 | /* recovery follows the physical size of devices */ |
58c0fed4 | 7978 | max_sectors = mddev->dev_sectors; |
5fd6c1dc | 7979 | j = MaxSector; |
4e59ca7d | 7980 | rcu_read_lock(); |
dafb20fa | 7981 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 7982 | if (rdev->raid_disk >= 0 && |
f2076e7d | 7983 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
7984 | !test_bit(Faulty, &rdev->flags) && |
7985 | !test_bit(In_sync, &rdev->flags) && | |
7986 | rdev->recovery_offset < j) | |
7987 | j = rdev->recovery_offset; | |
4e59ca7d | 7988 | rcu_read_unlock(); |
133d4527 N |
7989 | |
7990 | /* If there is a bitmap, we need to make sure all | |
7991 | * writes that started before we added a spare | |
7992 | * complete before we start doing a recovery. | |
7993 | * Otherwise the write might complete and (via | |
7994 | * bitmap_endwrite) set a bit in the bitmap after the | |
7995 | * recovery has checked that bit and skipped that | |
7996 | * region. | |
7997 | */ | |
7998 | if (mddev->bitmap) { | |
7999 | mddev->pers->quiesce(mddev, 1); | |
8000 | mddev->pers->quiesce(mddev, 0); | |
8001 | } | |
5fd6c1dc | 8002 | } |
1da177e4 | 8003 | |
9d48739e N |
8004 | pr_info("md: %s of RAID array %s\n", desc, mdname(mddev)); |
8005 | pr_debug("md: minimum _guaranteed_ speed: %d KB/sec/disk.\n", speed_min(mddev)); | |
8006 | pr_debug("md: using maximum available idle IO bandwidth (but not more than %d KB/sec) for %s.\n", | |
8007 | speed_max(mddev), desc); | |
1da177e4 | 8008 | |
eea1bf38 | 8009 | is_mddev_idle(mddev, 1); /* this initializes IO event counters */ |
5fd6c1dc | 8010 | |
57afd89f | 8011 | io_sectors = 0; |
1da177e4 LT |
8012 | for (m = 0; m < SYNC_MARKS; m++) { |
8013 | mark[m] = jiffies; | |
57afd89f | 8014 | mark_cnt[m] = io_sectors; |
1da177e4 LT |
8015 | } |
8016 | last_mark = 0; | |
8017 | mddev->resync_mark = mark[last_mark]; | |
8018 | mddev->resync_mark_cnt = mark_cnt[last_mark]; | |
8019 | ||
8020 | /* | |
8021 | * Tune reconstruction: | |
8022 | */ | |
8023 | window = 32*(PAGE_SIZE/512); | |
9d48739e N |
8024 | pr_debug("md: using %dk window, over a total of %lluk.\n", |
8025 | window/2, (unsigned long long)max_sectors/2); | |
1da177e4 LT |
8026 | |
8027 | atomic_set(&mddev->recovery_active, 0); | |
1da177e4 LT |
8028 | last_check = 0; |
8029 | ||
8030 | if (j>2) { | |
9d48739e N |
8031 | pr_debug("md: resuming %s of %s from checkpoint.\n", |
8032 | desc, mdname(mddev)); | |
1da177e4 | 8033 | mddev->curr_resync = j; |
72f36d59 N |
8034 | } else |
8035 | mddev->curr_resync = 3; /* no longer delayed */ | |
75d3da43 | 8036 | mddev->curr_resync_completed = j; |
72f36d59 N |
8037 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); |
8038 | md_new_event(mddev); | |
54f89341 | 8039 | update_time = jiffies; |
1da177e4 | 8040 | |
7c2c57c9 | 8041 | blk_start_plug(&plug); |
1da177e4 | 8042 | while (j < max_sectors) { |
57afd89f | 8043 | sector_t sectors; |
1da177e4 | 8044 | |
57afd89f | 8045 | skipped = 0; |
97e4f42d | 8046 | |
7a91ee1f N |
8047 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8048 | ((mddev->curr_resync > mddev->curr_resync_completed && | |
8049 | (mddev->curr_resync - mddev->curr_resync_completed) | |
8050 | > (max_sectors >> 4)) || | |
54f89341 | 8051 | time_after_eq(jiffies, update_time + UPDATE_FREQUENCY) || |
7a91ee1f | 8052 | (j - mddev->curr_resync_completed)*2 |
c5e19d90 N |
8053 | >= mddev->resync_max - mddev->curr_resync_completed || |
8054 | mddev->curr_resync_completed > mddev->resync_max | |
7a91ee1f | 8055 | )) { |
97e4f42d | 8056 | /* time to update curr_resync_completed */ |
97e4f42d N |
8057 | wait_event(mddev->recovery_wait, |
8058 | atomic_read(&mddev->recovery_active) == 0); | |
75d3da43 | 8059 | mddev->curr_resync_completed = j; |
35d78c66 | 8060 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && |
8061 | j > mddev->recovery_cp) | |
8062 | mddev->recovery_cp = j; | |
54f89341 | 8063 | update_time = jiffies; |
2953079c | 8064 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
acb180b0 | 8065 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); |
97e4f42d | 8066 | } |
acb180b0 | 8067 | |
c91abf5a N |
8068 | while (j >= mddev->resync_max && |
8069 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
e62e58a5 N |
8070 | /* As this condition is controlled by user-space, |
8071 | * we can block indefinitely, so use '_interruptible' | |
8072 | * to avoid triggering warnings. | |
8073 | */ | |
8074 | flush_signals(current); /* just in case */ | |
8075 | wait_event_interruptible(mddev->recovery_wait, | |
8076 | mddev->resync_max > j | |
c91abf5a N |
8077 | || test_bit(MD_RECOVERY_INTR, |
8078 | &mddev->recovery)); | |
e62e58a5 | 8079 | } |
acb180b0 | 8080 | |
c91abf5a N |
8081 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8082 | break; | |
acb180b0 | 8083 | |
09314799 | 8084 | sectors = mddev->pers->sync_request(mddev, j, &skipped); |
57afd89f | 8085 | if (sectors == 0) { |
dfc70645 | 8086 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
c91abf5a | 8087 | break; |
1da177e4 | 8088 | } |
57afd89f N |
8089 | |
8090 | if (!skipped) { /* actual IO requested */ | |
8091 | io_sectors += sectors; | |
8092 | atomic_add(sectors, &mddev->recovery_active); | |
8093 | } | |
8094 | ||
e875ecea N |
8095 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8096 | break; | |
8097 | ||
1da177e4 | 8098 | j += sectors; |
5ed1df2e N |
8099 | if (j > max_sectors) |
8100 | /* when skipping, extra large numbers can be returned. */ | |
8101 | j = max_sectors; | |
72f36d59 N |
8102 | if (j > 2) |
8103 | mddev->curr_resync = j; | |
ff4e8d9a | 8104 | mddev->curr_mark_cnt = io_sectors; |
d7603b7e | 8105 | if (last_check == 0) |
e875ecea | 8106 | /* this is the earliest that rebuild will be |
d7603b7e N |
8107 | * visible in /proc/mdstat |
8108 | */ | |
8109 | md_new_event(mddev); | |
57afd89f N |
8110 | |
8111 | if (last_check + window > io_sectors || j == max_sectors) | |
1da177e4 LT |
8112 | continue; |
8113 | ||
57afd89f | 8114 | last_check = io_sectors; |
1da177e4 LT |
8115 | repeat: |
8116 | if (time_after_eq(jiffies, mark[last_mark] + SYNC_MARK_STEP )) { | |
8117 | /* step marks */ | |
8118 | int next = (last_mark+1) % SYNC_MARKS; | |
8119 | ||
8120 | mddev->resync_mark = mark[next]; | |
8121 | mddev->resync_mark_cnt = mark_cnt[next]; | |
8122 | mark[next] = jiffies; | |
57afd89f | 8123 | mark_cnt[next] = io_sectors - atomic_read(&mddev->recovery_active); |
1da177e4 LT |
8124 | last_mark = next; |
8125 | } | |
8126 | ||
c91abf5a N |
8127 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8128 | break; | |
1da177e4 LT |
8129 | |
8130 | /* | |
8131 | * this loop exits only if either when we are slower than | |
8132 | * the 'hard' speed limit, or the system was IO-idle for | |
8133 | * a jiffy. | |
8134 | * the system might be non-idle CPU-wise, but we only care | |
8135 | * about not overloading the IO subsystem. (things like an | |
8136 | * e2fsck being done on the RAID array should execute fast) | |
8137 | */ | |
1da177e4 LT |
8138 | cond_resched(); |
8139 | ||
ac7e50a3 XN |
8140 | recovery_done = io_sectors - atomic_read(&mddev->recovery_active); |
8141 | currspeed = ((unsigned long)(recovery_done - mddev->resync_mark_cnt))/2 | |
57afd89f | 8142 | /((jiffies-mddev->resync_mark)/HZ +1) +1; |
1da177e4 | 8143 | |
88202a0c | 8144 | if (currspeed > speed_min(mddev)) { |
ac8fa419 | 8145 | if (currspeed > speed_max(mddev)) { |
c0e48521 | 8146 | msleep(500); |
1da177e4 LT |
8147 | goto repeat; |
8148 | } | |
ac8fa419 N |
8149 | if (!is_mddev_idle(mddev, 0)) { |
8150 | /* | |
8151 | * Give other IO more of a chance. | |
8152 | * The faster the devices, the less we wait. | |
8153 | */ | |
8154 | wait_event(mddev->recovery_wait, | |
8155 | !atomic_read(&mddev->recovery_active)); | |
8156 | } | |
1da177e4 LT |
8157 | } |
8158 | } | |
9d48739e N |
8159 | pr_info("md: %s: %s %s.\n",mdname(mddev), desc, |
8160 | test_bit(MD_RECOVERY_INTR, &mddev->recovery) | |
8161 | ? "interrupted" : "done"); | |
1da177e4 LT |
8162 | /* |
8163 | * this also signals 'finished resyncing' to md_stop | |
8164 | */ | |
7c2c57c9 | 8165 | blk_finish_plug(&plug); |
1da177e4 LT |
8166 | wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active)); |
8167 | ||
5ed1df2e N |
8168 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8169 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
1217e1d1 | 8170 | mddev->curr_resync > 3) { |
5ed1df2e N |
8171 | mddev->curr_resync_completed = mddev->curr_resync; |
8172 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); | |
8173 | } | |
09314799 | 8174 | mddev->pers->sync_request(mddev, max_sectors, &skipped); |
1da177e4 | 8175 | |
dfc70645 | 8176 | if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) && |
1217e1d1 | 8177 | mddev->curr_resync > 3) { |
5fd6c1dc N |
8178 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
8179 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
8180 | if (mddev->curr_resync >= mddev->recovery_cp) { | |
9d48739e N |
8181 | pr_debug("md: checkpointing %s of %s.\n", |
8182 | desc, mdname(mddev)); | |
0a19caab | 8183 | if (test_bit(MD_RECOVERY_ERROR, |
8184 | &mddev->recovery)) | |
8185 | mddev->recovery_cp = | |
8186 | mddev->curr_resync_completed; | |
8187 | else | |
8188 | mddev->recovery_cp = | |
8189 | mddev->curr_resync; | |
5fd6c1dc N |
8190 | } |
8191 | } else | |
8192 | mddev->recovery_cp = MaxSector; | |
8193 | } else { | |
8194 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) | |
8195 | mddev->curr_resync = MaxSector; | |
4e59ca7d | 8196 | rcu_read_lock(); |
dafb20fa | 8197 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 8198 | if (rdev->raid_disk >= 0 && |
70fffd0b | 8199 | mddev->delta_disks >= 0 && |
f2076e7d | 8200 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
8201 | !test_bit(Faulty, &rdev->flags) && |
8202 | !test_bit(In_sync, &rdev->flags) && | |
8203 | rdev->recovery_offset < mddev->curr_resync) | |
8204 | rdev->recovery_offset = mddev->curr_resync; | |
4e59ca7d | 8205 | rcu_read_unlock(); |
5fd6c1dc | 8206 | } |
1da177e4 | 8207 | } |
db91ff55 | 8208 | skip: |
bb8bf15b GJ |
8209 | /* set CHANGE_PENDING here since maybe another update is needed, |
8210 | * so other nodes are informed. It should be harmless for normal | |
8211 | * raid */ | |
2953079c SL |
8212 | set_mask_bits(&mddev->sb_flags, 0, |
8213 | BIT(MD_SB_CHANGE_PENDING) | BIT(MD_SB_CHANGE_DEVS)); | |
c186b128 | 8214 | |
23da422b | 8215 | spin_lock(&mddev->lock); |
c07b70ad N |
8216 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { |
8217 | /* We completed so min/max setting can be forgotten if used. */ | |
8218 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
8219 | mddev->resync_min = 0; | |
8220 | mddev->resync_max = MaxSector; | |
8221 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
8222 | mddev->resync_min = mddev->curr_resync_completed; | |
f7851be7 | 8223 | set_bit(MD_RECOVERY_DONE, &mddev->recovery); |
1da177e4 | 8224 | mddev->curr_resync = 0; |
23da422b N |
8225 | spin_unlock(&mddev->lock); |
8226 | ||
1da177e4 | 8227 | wake_up(&resync_wait); |
1da177e4 | 8228 | md_wakeup_thread(mddev->thread); |
c6207277 | 8229 | return; |
1da177e4 | 8230 | } |
29269553 | 8231 | EXPORT_SYMBOL_GPL(md_do_sync); |
1da177e4 | 8232 | |
746d3207 N |
8233 | static int remove_and_add_spares(struct mddev *mddev, |
8234 | struct md_rdev *this) | |
b4c4c7b8 | 8235 | { |
3cb03002 | 8236 | struct md_rdev *rdev; |
b4c4c7b8 | 8237 | int spares = 0; |
f2a371c5 | 8238 | int removed = 0; |
d787be40 | 8239 | bool remove_some = false; |
b4c4c7b8 | 8240 | |
d787be40 N |
8241 | rdev_for_each(rdev, mddev) { |
8242 | if ((this == NULL || rdev == this) && | |
8243 | rdev->raid_disk >= 0 && | |
8244 | !test_bit(Blocked, &rdev->flags) && | |
8245 | test_bit(Faulty, &rdev->flags) && | |
8246 | atomic_read(&rdev->nr_pending)==0) { | |
8247 | /* Faulty non-Blocked devices with nr_pending == 0 | |
8248 | * never get nr_pending incremented, | |
8249 | * never get Faulty cleared, and never get Blocked set. | |
8250 | * So we can synchronize_rcu now rather than once per device | |
8251 | */ | |
8252 | remove_some = true; | |
8253 | set_bit(RemoveSynchronized, &rdev->flags); | |
8254 | } | |
8255 | } | |
8256 | ||
8257 | if (remove_some) | |
8258 | synchronize_rcu(); | |
8259 | rdev_for_each(rdev, mddev) { | |
746d3207 N |
8260 | if ((this == NULL || rdev == this) && |
8261 | rdev->raid_disk >= 0 && | |
6bfe0b49 | 8262 | !test_bit(Blocked, &rdev->flags) && |
d787be40 | 8263 | ((test_bit(RemoveSynchronized, &rdev->flags) || |
f2076e7d SL |
8264 | (!test_bit(In_sync, &rdev->flags) && |
8265 | !test_bit(Journal, &rdev->flags))) && | |
d787be40 | 8266 | atomic_read(&rdev->nr_pending)==0)) { |
b4c4c7b8 | 8267 | if (mddev->pers->hot_remove_disk( |
b8321b68 | 8268 | mddev, rdev) == 0) { |
36fad858 | 8269 | sysfs_unlink_rdev(mddev, rdev); |
b4c4c7b8 | 8270 | rdev->raid_disk = -1; |
f2a371c5 | 8271 | removed++; |
b4c4c7b8 N |
8272 | } |
8273 | } | |
d787be40 N |
8274 | if (remove_some && test_bit(RemoveSynchronized, &rdev->flags)) |
8275 | clear_bit(RemoveSynchronized, &rdev->flags); | |
8276 | } | |
8277 | ||
90584fc9 JB |
8278 | if (removed && mddev->kobj.sd) |
8279 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
b4c4c7b8 | 8280 | |
2910ff17 | 8281 | if (this && removed) |
746d3207 N |
8282 | goto no_add; |
8283 | ||
dafb20fa | 8284 | rdev_for_each(rdev, mddev) { |
2910ff17 GR |
8285 | if (this && this != rdev) |
8286 | continue; | |
dbb64f86 GR |
8287 | if (test_bit(Candidate, &rdev->flags)) |
8288 | continue; | |
7bfec5f3 N |
8289 | if (rdev->raid_disk >= 0 && |
8290 | !test_bit(In_sync, &rdev->flags) && | |
f2076e7d | 8291 | !test_bit(Journal, &rdev->flags) && |
7bfec5f3 N |
8292 | !test_bit(Faulty, &rdev->flags)) |
8293 | spares++; | |
7ceb17e8 N |
8294 | if (rdev->raid_disk >= 0) |
8295 | continue; | |
8296 | if (test_bit(Faulty, &rdev->flags)) | |
8297 | continue; | |
f6b6ec5c SL |
8298 | if (!test_bit(Journal, &rdev->flags)) { |
8299 | if (mddev->ro && | |
8300 | ! (rdev->saved_raid_disk >= 0 && | |
8301 | !test_bit(Bitmap_sync, &rdev->flags))) | |
8302 | continue; | |
7ceb17e8 | 8303 | |
f6b6ec5c SL |
8304 | rdev->recovery_offset = 0; |
8305 | } | |
7ceb17e8 N |
8306 | if (mddev->pers-> |
8307 | hot_add_disk(mddev, rdev) == 0) { | |
8308 | if (sysfs_link_rdev(mddev, rdev)) | |
8309 | /* failure here is OK */; | |
f6b6ec5c SL |
8310 | if (!test_bit(Journal, &rdev->flags)) |
8311 | spares++; | |
7ceb17e8 | 8312 | md_new_event(mddev); |
2953079c | 8313 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
dfc70645 | 8314 | } |
b4c4c7b8 | 8315 | } |
746d3207 | 8316 | no_add: |
6dafab6b | 8317 | if (removed) |
2953079c | 8318 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
b4c4c7b8 N |
8319 | return spares; |
8320 | } | |
7ebc0be7 | 8321 | |
ac05f256 N |
8322 | static void md_start_sync(struct work_struct *ws) |
8323 | { | |
8324 | struct mddev *mddev = container_of(ws, struct mddev, del_work); | |
c186b128 | 8325 | |
ac05f256 N |
8326 | mddev->sync_thread = md_register_thread(md_do_sync, |
8327 | mddev, | |
8328 | "resync"); | |
8329 | if (!mddev->sync_thread) { | |
9d48739e N |
8330 | pr_warn("%s: could not start resync thread...\n", |
8331 | mdname(mddev)); | |
ac05f256 N |
8332 | /* leave the spares where they are, it shouldn't hurt */ |
8333 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
8334 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
8335 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
8336 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
8337 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 8338 | wake_up(&resync_wait); |
ac05f256 N |
8339 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
8340 | &mddev->recovery)) | |
8341 | if (mddev->sysfs_action) | |
8342 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8343 | } else | |
8344 | md_wakeup_thread(mddev->sync_thread); | |
8345 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8346 | md_new_event(mddev); | |
8347 | } | |
8348 | ||
1da177e4 LT |
8349 | /* |
8350 | * This routine is regularly called by all per-raid-array threads to | |
8351 | * deal with generic issues like resync and super-block update. | |
8352 | * Raid personalities that don't have a thread (linear/raid0) do not | |
8353 | * need this as they never do any recovery or update the superblock. | |
8354 | * | |
8355 | * It does not do any resync itself, but rather "forks" off other threads | |
8356 | * to do that as needed. | |
8357 | * When it is determined that resync is needed, we set MD_RECOVERY_RUNNING in | |
8358 | * "->recovery" and create a thread at ->sync_thread. | |
dfc70645 | 8359 | * When the thread finishes it sets MD_RECOVERY_DONE |
1da177e4 LT |
8360 | * and wakeups up this thread which will reap the thread and finish up. |
8361 | * This thread also removes any faulty devices (with nr_pending == 0). | |
8362 | * | |
8363 | * The overall approach is: | |
8364 | * 1/ if the superblock needs updating, update it. | |
8365 | * 2/ If a recovery thread is running, don't do anything else. | |
8366 | * 3/ If recovery has finished, clean up, possibly marking spares active. | |
8367 | * 4/ If there are any faulty devices, remove them. | |
8368 | * 5/ If array is degraded, try to add spares devices | |
8369 | * 6/ If array has spares or is not in-sync, start a resync thread. | |
8370 | */ | |
fd01b88c | 8371 | void md_check_recovery(struct mddev *mddev) |
1da177e4 | 8372 | { |
68866e42 JB |
8373 | if (mddev->suspended) |
8374 | return; | |
8375 | ||
5f40402d | 8376 | if (mddev->bitmap) |
aa5cbd10 | 8377 | bitmap_daemon_work(mddev); |
1da177e4 | 8378 | |
fca4d848 | 8379 | if (signal_pending(current)) { |
31a59e34 | 8380 | if (mddev->pers->sync_request && !mddev->external) { |
9d48739e N |
8381 | pr_debug("md: %s in immediate safe mode\n", |
8382 | mdname(mddev)); | |
fca4d848 N |
8383 | mddev->safemode = 2; |
8384 | } | |
8385 | flush_signals(current); | |
8386 | } | |
8387 | ||
c89a8eee N |
8388 | if (mddev->ro && !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) |
8389 | return; | |
1da177e4 | 8390 | if ( ! ( |
2953079c | 8391 | (mddev->sb_flags & ~ (1<<MD_SB_CHANGE_PENDING)) || |
1da177e4 | 8392 | test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
fca4d848 | 8393 | test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
15858fa5 | 8394 | test_bit(MD_RELOAD_SB, &mddev->flags) || |
31a59e34 | 8395 | (mddev->external == 0 && mddev->safemode == 1) || |
fca4d848 N |
8396 | (mddev->safemode == 2 && ! atomic_read(&mddev->writes_pending) |
8397 | && !mddev->in_sync && mddev->recovery_cp == MaxSector) | |
1da177e4 LT |
8398 | )) |
8399 | return; | |
fca4d848 | 8400 | |
df5b89b3 | 8401 | if (mddev_trylock(mddev)) { |
b4c4c7b8 | 8402 | int spares = 0; |
fca4d848 | 8403 | |
c89a8eee | 8404 | if (mddev->ro) { |
ab16bfc7 NB |
8405 | struct md_rdev *rdev; |
8406 | if (!mddev->external && mddev->in_sync) | |
8407 | /* 'Blocked' flag not needed as failed devices | |
8408 | * will be recorded if array switched to read/write. | |
8409 | * Leaving it set will prevent the device | |
8410 | * from being removed. | |
8411 | */ | |
8412 | rdev_for_each(rdev, mddev) | |
8413 | clear_bit(Blocked, &rdev->flags); | |
7ceb17e8 N |
8414 | /* On a read-only array we can: |
8415 | * - remove failed devices | |
8416 | * - add already-in_sync devices if the array itself | |
8417 | * is in-sync. | |
8418 | * As we only add devices that are already in-sync, | |
8419 | * we can activate the spares immediately. | |
c89a8eee | 8420 | */ |
7ceb17e8 | 8421 | remove_and_add_spares(mddev, NULL); |
8313b8e5 N |
8422 | /* There is no thread, but we need to call |
8423 | * ->spare_active and clear saved_raid_disk | |
8424 | */ | |
2ac295a5 | 8425 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8313b8e5 | 8426 | md_reap_sync_thread(mddev); |
a4a3d26d | 8427 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
8313b8e5 | 8428 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
2953079c | 8429 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
c89a8eee N |
8430 | goto unlock; |
8431 | } | |
8432 | ||
659b254f GJ |
8433 | if (mddev_is_clustered(mddev)) { |
8434 | struct md_rdev *rdev; | |
8435 | /* kick the device if another node issued a | |
8436 | * remove disk. | |
8437 | */ | |
8438 | rdev_for_each(rdev, mddev) { | |
8439 | if (test_and_clear_bit(ClusterRemove, &rdev->flags) && | |
8440 | rdev->raid_disk < 0) | |
8441 | md_kick_rdev_from_array(rdev); | |
8442 | } | |
15858fa5 GJ |
8443 | |
8444 | if (test_and_clear_bit(MD_RELOAD_SB, &mddev->flags)) | |
8445 | md_reload_sb(mddev, mddev->good_device_nr); | |
659b254f GJ |
8446 | } |
8447 | ||
31a59e34 | 8448 | if (!mddev->external) { |
0fd62b86 | 8449 | int did_change = 0; |
85572d7c | 8450 | spin_lock(&mddev->lock); |
31a59e34 N |
8451 | if (mddev->safemode && |
8452 | !atomic_read(&mddev->writes_pending) && | |
8453 | !mddev->in_sync && | |
8454 | mddev->recovery_cp == MaxSector) { | |
8455 | mddev->in_sync = 1; | |
0fd62b86 | 8456 | did_change = 1; |
2953079c | 8457 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
31a59e34 N |
8458 | } |
8459 | if (mddev->safemode == 1) | |
8460 | mddev->safemode = 0; | |
85572d7c | 8461 | spin_unlock(&mddev->lock); |
0fd62b86 | 8462 | if (did_change) |
00bcb4ac | 8463 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
fca4d848 | 8464 | } |
fca4d848 | 8465 | |
2953079c | 8466 | if (mddev->sb_flags) |
850b2b42 | 8467 | md_update_sb(mddev, 0); |
06d91a5f | 8468 | |
1da177e4 LT |
8469 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
8470 | !test_bit(MD_RECOVERY_DONE, &mddev->recovery)) { | |
8471 | /* resync/recovery still happening */ | |
8472 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8473 | goto unlock; | |
8474 | } | |
8475 | if (mddev->sync_thread) { | |
a91d5ac0 | 8476 | md_reap_sync_thread(mddev); |
1da177e4 LT |
8477 | goto unlock; |
8478 | } | |
72a23c21 NB |
8479 | /* Set RUNNING before clearing NEEDED to avoid |
8480 | * any transients in the value of "sync_action". | |
8481 | */ | |
72f36d59 | 8482 | mddev->curr_resync_completed = 0; |
23da422b | 8483 | spin_lock(&mddev->lock); |
72a23c21 | 8484 | set_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
23da422b | 8485 | spin_unlock(&mddev->lock); |
24dd469d N |
8486 | /* Clear some bits that don't mean anything, but |
8487 | * might be left set | |
8488 | */ | |
24dd469d N |
8489 | clear_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8490 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); | |
1da177e4 | 8491 | |
ed209584 N |
8492 | if (!test_and_clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
8493 | test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) | |
ac05f256 | 8494 | goto not_running; |
1da177e4 LT |
8495 | /* no recovery is running. |
8496 | * remove any failed drives, then | |
8497 | * add spares if possible. | |
72f36d59 | 8498 | * Spares are also removed and re-added, to allow |
1da177e4 LT |
8499 | * the personality to fail the re-add. |
8500 | */ | |
1da177e4 | 8501 | |
b4c4c7b8 | 8502 | if (mddev->reshape_position != MaxSector) { |
50ac168a N |
8503 | if (mddev->pers->check_reshape == NULL || |
8504 | mddev->pers->check_reshape(mddev) != 0) | |
b4c4c7b8 | 8505 | /* Cannot proceed */ |
ac05f256 | 8506 | goto not_running; |
b4c4c7b8 | 8507 | set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); |
72a23c21 | 8508 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
746d3207 | 8509 | } else if ((spares = remove_and_add_spares(mddev, NULL))) { |
24dd469d N |
8510 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
8511 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
56ac36d7 | 8512 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
72a23c21 | 8513 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
8514 | } else if (mddev->recovery_cp < MaxSector) { |
8515 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
72a23c21 | 8516 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
8517 | } else if (!test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) |
8518 | /* nothing to be done ... */ | |
ac05f256 | 8519 | goto not_running; |
24dd469d | 8520 | |
1da177e4 | 8521 | if (mddev->pers->sync_request) { |
ef99bf48 | 8522 | if (spares) { |
a654b9d8 N |
8523 | /* We are adding a device or devices to an array |
8524 | * which has the bitmap stored on all devices. | |
8525 | * So make sure all bitmap pages get written | |
8526 | */ | |
8527 | bitmap_write_all(mddev->bitmap); | |
8528 | } | |
ac05f256 N |
8529 | INIT_WORK(&mddev->del_work, md_start_sync); |
8530 | queue_work(md_misc_wq, &mddev->del_work); | |
8531 | goto unlock; | |
1da177e4 | 8532 | } |
ac05f256 | 8533 | not_running: |
72a23c21 NB |
8534 | if (!mddev->sync_thread) { |
8535 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 8536 | wake_up(&resync_wait); |
72a23c21 NB |
8537 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
8538 | &mddev->recovery)) | |
0c3573f1 | 8539 | if (mddev->sysfs_action) |
00bcb4ac | 8540 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
72a23c21 | 8541 | } |
ac05f256 N |
8542 | unlock: |
8543 | wake_up(&mddev->sb_wait); | |
1da177e4 LT |
8544 | mddev_unlock(mddev); |
8545 | } | |
8546 | } | |
6c144d31 | 8547 | EXPORT_SYMBOL(md_check_recovery); |
1da177e4 | 8548 | |
a91d5ac0 JB |
8549 | void md_reap_sync_thread(struct mddev *mddev) |
8550 | { | |
8551 | struct md_rdev *rdev; | |
8552 | ||
8553 | /* resync has finished, collect result */ | |
8554 | md_unregister_thread(&mddev->sync_thread); | |
8555 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
8556 | !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
8557 | /* success...*/ | |
8558 | /* activate any spares */ | |
8559 | if (mddev->pers->spare_active(mddev)) { | |
8560 | sysfs_notify(&mddev->kobj, NULL, | |
8561 | "degraded"); | |
2953079c | 8562 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a91d5ac0 JB |
8563 | } |
8564 | } | |
8565 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
8566 | mddev->pers->finish_reshape) | |
8567 | mddev->pers->finish_reshape(mddev); | |
8568 | ||
8569 | /* If array is no-longer degraded, then any saved_raid_disk | |
f466722c | 8570 | * information must be scrapped. |
a91d5ac0 | 8571 | */ |
f466722c N |
8572 | if (!mddev->degraded) |
8573 | rdev_for_each(rdev, mddev) | |
a91d5ac0 JB |
8574 | rdev->saved_raid_disk = -1; |
8575 | ||
8576 | md_update_sb(mddev, 1); | |
2953079c | 8577 | /* MD_SB_CHANGE_PENDING should be cleared by md_update_sb, so we can |
bb8bf15b GJ |
8578 | * call resync_finish here if MD_CLUSTER_RESYNC_LOCKED is set by |
8579 | * clustered raid */ | |
8580 | if (test_and_clear_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags)) | |
8581 | md_cluster_ops->resync_finish(mddev); | |
a91d5ac0 | 8582 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
ea358cd0 | 8583 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); |
a91d5ac0 JB |
8584 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
8585 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
8586 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
8587 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
f851b60d | 8588 | wake_up(&resync_wait); |
a91d5ac0 JB |
8589 | /* flag recovery needed just to double check */ |
8590 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8591 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8592 | md_new_event(mddev); | |
8593 | if (mddev->event_work.func) | |
8594 | queue_work(md_misc_wq, &mddev->event_work); | |
8595 | } | |
6c144d31 | 8596 | EXPORT_SYMBOL(md_reap_sync_thread); |
a91d5ac0 | 8597 | |
fd01b88c | 8598 | void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev) |
6bfe0b49 | 8599 | { |
00bcb4ac | 8600 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
6bfe0b49 | 8601 | wait_event_timeout(rdev->blocked_wait, |
de393cde N |
8602 | !test_bit(Blocked, &rdev->flags) && |
8603 | !test_bit(BlockedBadBlocks, &rdev->flags), | |
6bfe0b49 DW |
8604 | msecs_to_jiffies(5000)); |
8605 | rdev_dec_pending(rdev, mddev); | |
8606 | } | |
8607 | EXPORT_SYMBOL(md_wait_for_blocked_rdev); | |
8608 | ||
c6563a8c N |
8609 | void md_finish_reshape(struct mddev *mddev) |
8610 | { | |
8611 | /* called be personality module when reshape completes. */ | |
8612 | struct md_rdev *rdev; | |
8613 | ||
8614 | rdev_for_each(rdev, mddev) { | |
8615 | if (rdev->data_offset > rdev->new_data_offset) | |
8616 | rdev->sectors += rdev->data_offset - rdev->new_data_offset; | |
8617 | else | |
8618 | rdev->sectors -= rdev->new_data_offset - rdev->data_offset; | |
8619 | rdev->data_offset = rdev->new_data_offset; | |
8620 | } | |
8621 | } | |
8622 | EXPORT_SYMBOL(md_finish_reshape); | |
2230dfe4 | 8623 | |
fc974ee2 | 8624 | /* Bad block management */ |
2230dfe4 | 8625 | |
fc974ee2 | 8626 | /* Returns 1 on success, 0 on failure */ |
3cb03002 | 8627 | int rdev_set_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
c6563a8c | 8628 | int is_new) |
2230dfe4 | 8629 | { |
85ad1d13 | 8630 | struct mddev *mddev = rdev->mddev; |
c6563a8c N |
8631 | int rv; |
8632 | if (is_new) | |
8633 | s += rdev->new_data_offset; | |
8634 | else | |
8635 | s += rdev->data_offset; | |
fc974ee2 VV |
8636 | rv = badblocks_set(&rdev->badblocks, s, sectors, 0); |
8637 | if (rv == 0) { | |
2230dfe4 | 8638 | /* Make sure they get written out promptly */ |
35b785f7 TM |
8639 | if (test_bit(ExternalBbl, &rdev->flags)) |
8640 | sysfs_notify(&rdev->kobj, NULL, | |
8641 | "unacknowledged_bad_blocks"); | |
8bd2f0a0 | 8642 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
2953079c SL |
8643 | set_mask_bits(&mddev->sb_flags, 0, |
8644 | BIT(MD_SB_CHANGE_CLEAN) | BIT(MD_SB_CHANGE_PENDING)); | |
2230dfe4 | 8645 | md_wakeup_thread(rdev->mddev->thread); |
fc974ee2 VV |
8646 | return 1; |
8647 | } else | |
8648 | return 0; | |
2230dfe4 N |
8649 | } |
8650 | EXPORT_SYMBOL_GPL(rdev_set_badblocks); | |
8651 | ||
c6563a8c N |
8652 | int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
8653 | int is_new) | |
2230dfe4 | 8654 | { |
35b785f7 | 8655 | int rv; |
c6563a8c N |
8656 | if (is_new) |
8657 | s += rdev->new_data_offset; | |
8658 | else | |
8659 | s += rdev->data_offset; | |
35b785f7 TM |
8660 | rv = badblocks_clear(&rdev->badblocks, s, sectors); |
8661 | if ((rv == 0) && test_bit(ExternalBbl, &rdev->flags)) | |
8662 | sysfs_notify(&rdev->kobj, NULL, "bad_blocks"); | |
8663 | return rv; | |
2230dfe4 N |
8664 | } |
8665 | EXPORT_SYMBOL_GPL(rdev_clear_badblocks); | |
8666 | ||
75c96f85 AB |
8667 | static int md_notify_reboot(struct notifier_block *this, |
8668 | unsigned long code, void *x) | |
1da177e4 LT |
8669 | { |
8670 | struct list_head *tmp; | |
fd01b88c | 8671 | struct mddev *mddev; |
2dba6a91 | 8672 | int need_delay = 0; |
1da177e4 | 8673 | |
c744a65c N |
8674 | for_each_mddev(mddev, tmp) { |
8675 | if (mddev_trylock(mddev)) { | |
30b8aa91 N |
8676 | if (mddev->pers) |
8677 | __md_stop_writes(mddev); | |
0f62fb22 N |
8678 | if (mddev->persistent) |
8679 | mddev->safemode = 2; | |
c744a65c | 8680 | mddev_unlock(mddev); |
2dba6a91 | 8681 | } |
c744a65c | 8682 | need_delay = 1; |
1da177e4 | 8683 | } |
c744a65c N |
8684 | /* |
8685 | * certain more exotic SCSI devices are known to be | |
8686 | * volatile wrt too early system reboots. While the | |
8687 | * right place to handle this issue is the given | |
8688 | * driver, we do want to have a safe RAID driver ... | |
8689 | */ | |
8690 | if (need_delay) | |
8691 | mdelay(1000*1); | |
8692 | ||
1da177e4 LT |
8693 | return NOTIFY_DONE; |
8694 | } | |
8695 | ||
75c96f85 | 8696 | static struct notifier_block md_notifier = { |
1da177e4 LT |
8697 | .notifier_call = md_notify_reboot, |
8698 | .next = NULL, | |
8699 | .priority = INT_MAX, /* before any real devices */ | |
8700 | }; | |
8701 | ||
8702 | static void md_geninit(void) | |
8703 | { | |
36a4e1fe | 8704 | pr_debug("md: sizeof(mdp_super_t) = %d\n", (int)sizeof(mdp_super_t)); |
1da177e4 | 8705 | |
c7705f34 | 8706 | proc_create("mdstat", S_IRUGO, NULL, &md_seq_fops); |
1da177e4 LT |
8707 | } |
8708 | ||
75c96f85 | 8709 | static int __init md_init(void) |
1da177e4 | 8710 | { |
e804ac78 TH |
8711 | int ret = -ENOMEM; |
8712 | ||
ada609ee | 8713 | md_wq = alloc_workqueue("md", WQ_MEM_RECLAIM, 0); |
e804ac78 TH |
8714 | if (!md_wq) |
8715 | goto err_wq; | |
8716 | ||
8717 | md_misc_wq = alloc_workqueue("md_misc", 0, 0); | |
8718 | if (!md_misc_wq) | |
8719 | goto err_misc_wq; | |
8720 | ||
8721 | if ((ret = register_blkdev(MD_MAJOR, "md")) < 0) | |
8722 | goto err_md; | |
8723 | ||
8724 | if ((ret = register_blkdev(0, "mdp")) < 0) | |
8725 | goto err_mdp; | |
8726 | mdp_major = ret; | |
8727 | ||
af5628f0 | 8728 | blk_register_region(MKDEV(MD_MAJOR, 0), 512, THIS_MODULE, |
e8703fe1 N |
8729 | md_probe, NULL, NULL); |
8730 | blk_register_region(MKDEV(mdp_major, 0), 1UL<<MINORBITS, THIS_MODULE, | |
1da177e4 LT |
8731 | md_probe, NULL, NULL); |
8732 | ||
1da177e4 | 8733 | register_reboot_notifier(&md_notifier); |
0b4d4147 | 8734 | raid_table_header = register_sysctl_table(raid_root_table); |
1da177e4 LT |
8735 | |
8736 | md_geninit(); | |
d710e138 | 8737 | return 0; |
1da177e4 | 8738 | |
e804ac78 TH |
8739 | err_mdp: |
8740 | unregister_blkdev(MD_MAJOR, "md"); | |
8741 | err_md: | |
8742 | destroy_workqueue(md_misc_wq); | |
8743 | err_misc_wq: | |
8744 | destroy_workqueue(md_wq); | |
8745 | err_wq: | |
8746 | return ret; | |
8747 | } | |
1da177e4 | 8748 | |
70bcecdb | 8749 | static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev) |
1d7e3e96 | 8750 | { |
70bcecdb GR |
8751 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
8752 | struct md_rdev *rdev2; | |
8753 | int role, ret; | |
8754 | char b[BDEVNAME_SIZE]; | |
1d7e3e96 | 8755 | |
70bcecdb GR |
8756 | /* Check for change of roles in the active devices */ |
8757 | rdev_for_each(rdev2, mddev) { | |
8758 | if (test_bit(Faulty, &rdev2->flags)) | |
8759 | continue; | |
8760 | ||
8761 | /* Check if the roles changed */ | |
8762 | role = le16_to_cpu(sb->dev_roles[rdev2->desc_nr]); | |
dbb64f86 GR |
8763 | |
8764 | if (test_bit(Candidate, &rdev2->flags)) { | |
8765 | if (role == 0xfffe) { | |
8766 | pr_info("md: Removing Candidate device %s because add failed\n", bdevname(rdev2->bdev,b)); | |
8767 | md_kick_rdev_from_array(rdev2); | |
8768 | continue; | |
8769 | } | |
8770 | else | |
8771 | clear_bit(Candidate, &rdev2->flags); | |
8772 | } | |
8773 | ||
70bcecdb GR |
8774 | if (role != rdev2->raid_disk) { |
8775 | /* got activated */ | |
8776 | if (rdev2->raid_disk == -1 && role != 0xffff) { | |
8777 | rdev2->saved_raid_disk = role; | |
8778 | ret = remove_and_add_spares(mddev, rdev2); | |
8779 | pr_info("Activated spare: %s\n", | |
9d48739e | 8780 | bdevname(rdev2->bdev,b)); |
a578183e GJ |
8781 | /* wakeup mddev->thread here, so array could |
8782 | * perform resync with the new activated disk */ | |
8783 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8784 | md_wakeup_thread(mddev->thread); | |
8785 | ||
70bcecdb GR |
8786 | } |
8787 | /* device faulty | |
8788 | * We just want to do the minimum to mark the disk | |
8789 | * as faulty. The recovery is performed by the | |
8790 | * one who initiated the error. | |
8791 | */ | |
8792 | if ((role == 0xfffe) || (role == 0xfffd)) { | |
8793 | md_error(mddev, rdev2); | |
8794 | clear_bit(Blocked, &rdev2->flags); | |
8795 | } | |
8796 | } | |
1d7e3e96 | 8797 | } |
70bcecdb | 8798 | |
28c1b9fd GR |
8799 | if (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) |
8800 | update_raid_disks(mddev, le32_to_cpu(sb->raid_disks)); | |
70bcecdb GR |
8801 | |
8802 | /* Finally set the event to be up to date */ | |
8803 | mddev->events = le64_to_cpu(sb->events); | |
8804 | } | |
8805 | ||
8806 | static int read_rdev(struct mddev *mddev, struct md_rdev *rdev) | |
8807 | { | |
8808 | int err; | |
8809 | struct page *swapout = rdev->sb_page; | |
8810 | struct mdp_superblock_1 *sb; | |
8811 | ||
8812 | /* Store the sb page of the rdev in the swapout temporary | |
8813 | * variable in case we err in the future | |
8814 | */ | |
8815 | rdev->sb_page = NULL; | |
7f0f0d87 N |
8816 | err = alloc_disk_sb(rdev); |
8817 | if (err == 0) { | |
8818 | ClearPageUptodate(rdev->sb_page); | |
8819 | rdev->sb_loaded = 0; | |
8820 | err = super_types[mddev->major_version]. | |
8821 | load_super(rdev, NULL, mddev->minor_version); | |
8822 | } | |
70bcecdb GR |
8823 | if (err < 0) { |
8824 | pr_warn("%s: %d Could not reload rdev(%d) err: %d. Restoring old values\n", | |
8825 | __func__, __LINE__, rdev->desc_nr, err); | |
7f0f0d87 N |
8826 | if (rdev->sb_page) |
8827 | put_page(rdev->sb_page); | |
70bcecdb GR |
8828 | rdev->sb_page = swapout; |
8829 | rdev->sb_loaded = 1; | |
8830 | return err; | |
1d7e3e96 GR |
8831 | } |
8832 | ||
70bcecdb GR |
8833 | sb = page_address(rdev->sb_page); |
8834 | /* Read the offset unconditionally, even if MD_FEATURE_RECOVERY_OFFSET | |
8835 | * is not set | |
8836 | */ | |
8837 | ||
8838 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)) | |
8839 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); | |
8840 | ||
8841 | /* The other node finished recovery, call spare_active to set | |
8842 | * device In_sync and mddev->degraded | |
8843 | */ | |
8844 | if (rdev->recovery_offset == MaxSector && | |
8845 | !test_bit(In_sync, &rdev->flags) && | |
8846 | mddev->pers->spare_active(mddev)) | |
8847 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
8848 | ||
8849 | put_page(swapout); | |
8850 | return 0; | |
8851 | } | |
8852 | ||
8853 | void md_reload_sb(struct mddev *mddev, int nr) | |
8854 | { | |
8855 | struct md_rdev *rdev; | |
8856 | int err; | |
8857 | ||
8858 | /* Find the rdev */ | |
8859 | rdev_for_each_rcu(rdev, mddev) { | |
8860 | if (rdev->desc_nr == nr) | |
8861 | break; | |
8862 | } | |
8863 | ||
8864 | if (!rdev || rdev->desc_nr != nr) { | |
8865 | pr_warn("%s: %d Could not find rdev with nr %d\n", __func__, __LINE__, nr); | |
8866 | return; | |
8867 | } | |
8868 | ||
8869 | err = read_rdev(mddev, rdev); | |
8870 | if (err < 0) | |
8871 | return; | |
8872 | ||
8873 | check_sb_changes(mddev, rdev); | |
8874 | ||
8875 | /* Read all rdev's to update recovery_offset */ | |
8876 | rdev_for_each_rcu(rdev, mddev) | |
8877 | read_rdev(mddev, rdev); | |
1d7e3e96 GR |
8878 | } |
8879 | EXPORT_SYMBOL(md_reload_sb); | |
8880 | ||
1da177e4 LT |
8881 | #ifndef MODULE |
8882 | ||
8883 | /* | |
8884 | * Searches all registered partitions for autorun RAID arrays | |
8885 | * at boot time. | |
8886 | */ | |
4d936ec1 | 8887 | |
5b1f5bc3 | 8888 | static DEFINE_MUTEX(detected_devices_mutex); |
4d936ec1 ME |
8889 | static LIST_HEAD(all_detected_devices); |
8890 | struct detected_devices_node { | |
8891 | struct list_head list; | |
8892 | dev_t dev; | |
8893 | }; | |
1da177e4 LT |
8894 | |
8895 | void md_autodetect_dev(dev_t dev) | |
8896 | { | |
4d936ec1 ME |
8897 | struct detected_devices_node *node_detected_dev; |
8898 | ||
8899 | node_detected_dev = kzalloc(sizeof(*node_detected_dev), GFP_KERNEL); | |
8900 | if (node_detected_dev) { | |
8901 | node_detected_dev->dev = dev; | |
5b1f5bc3 | 8902 | mutex_lock(&detected_devices_mutex); |
4d936ec1 | 8903 | list_add_tail(&node_detected_dev->list, &all_detected_devices); |
5b1f5bc3 | 8904 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 8905 | } |
1da177e4 LT |
8906 | } |
8907 | ||
1da177e4 LT |
8908 | static void autostart_arrays(int part) |
8909 | { | |
3cb03002 | 8910 | struct md_rdev *rdev; |
4d936ec1 ME |
8911 | struct detected_devices_node *node_detected_dev; |
8912 | dev_t dev; | |
8913 | int i_scanned, i_passed; | |
1da177e4 | 8914 | |
4d936ec1 ME |
8915 | i_scanned = 0; |
8916 | i_passed = 0; | |
1da177e4 | 8917 | |
9d48739e | 8918 | pr_info("md: Autodetecting RAID arrays.\n"); |
1da177e4 | 8919 | |
5b1f5bc3 | 8920 | mutex_lock(&detected_devices_mutex); |
4d936ec1 ME |
8921 | while (!list_empty(&all_detected_devices) && i_scanned < INT_MAX) { |
8922 | i_scanned++; | |
8923 | node_detected_dev = list_entry(all_detected_devices.next, | |
8924 | struct detected_devices_node, list); | |
8925 | list_del(&node_detected_dev->list); | |
8926 | dev = node_detected_dev->dev; | |
8927 | kfree(node_detected_dev); | |
90bcf133 | 8928 | mutex_unlock(&detected_devices_mutex); |
df968c4e | 8929 | rdev = md_import_device(dev,0, 90); |
90bcf133 | 8930 | mutex_lock(&detected_devices_mutex); |
1da177e4 LT |
8931 | if (IS_ERR(rdev)) |
8932 | continue; | |
8933 | ||
403df478 | 8934 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 8935 | continue; |
403df478 | 8936 | |
d0fae18f | 8937 | set_bit(AutoDetected, &rdev->flags); |
1da177e4 | 8938 | list_add(&rdev->same_set, &pending_raid_disks); |
4d936ec1 | 8939 | i_passed++; |
1da177e4 | 8940 | } |
5b1f5bc3 | 8941 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 8942 | |
9d48739e | 8943 | pr_debug("md: Scanned %d and added %d devices.\n", i_scanned, i_passed); |
1da177e4 LT |
8944 | |
8945 | autorun_devices(part); | |
8946 | } | |
8947 | ||
fdee8ae4 | 8948 | #endif /* !MODULE */ |
1da177e4 LT |
8949 | |
8950 | static __exit void md_exit(void) | |
8951 | { | |
fd01b88c | 8952 | struct mddev *mddev; |
1da177e4 | 8953 | struct list_head *tmp; |
e2f23b60 | 8954 | int delay = 1; |
8ab5e4c1 | 8955 | |
af5628f0 | 8956 | blk_unregister_region(MKDEV(MD_MAJOR,0), 512); |
e8703fe1 | 8957 | blk_unregister_region(MKDEV(mdp_major,0), 1U << MINORBITS); |
1da177e4 | 8958 | |
3dbd8c2e | 8959 | unregister_blkdev(MD_MAJOR,"md"); |
1da177e4 LT |
8960 | unregister_blkdev(mdp_major, "mdp"); |
8961 | unregister_reboot_notifier(&md_notifier); | |
8962 | unregister_sysctl_table(raid_table_header); | |
e2f23b60 N |
8963 | |
8964 | /* We cannot unload the modules while some process is | |
8965 | * waiting for us in select() or poll() - wake them up | |
8966 | */ | |
8967 | md_unloading = 1; | |
8968 | while (waitqueue_active(&md_event_waiters)) { | |
8969 | /* not safe to leave yet */ | |
8970 | wake_up(&md_event_waiters); | |
8971 | msleep(delay); | |
8972 | delay += delay; | |
8973 | } | |
1da177e4 | 8974 | remove_proc_entry("mdstat", NULL); |
e2f23b60 | 8975 | |
29ac4aa3 | 8976 | for_each_mddev(mddev, tmp) { |
1da177e4 | 8977 | export_array(mddev); |
d3374825 | 8978 | mddev->hold_active = 0; |
1da177e4 | 8979 | } |
e804ac78 TH |
8980 | destroy_workqueue(md_misc_wq); |
8981 | destroy_workqueue(md_wq); | |
1da177e4 LT |
8982 | } |
8983 | ||
685784aa | 8984 | subsys_initcall(md_init); |
1da177e4 LT |
8985 | module_exit(md_exit) |
8986 | ||
f91de92e N |
8987 | static int get_ro(char *buffer, struct kernel_param *kp) |
8988 | { | |
8989 | return sprintf(buffer, "%d", start_readonly); | |
8990 | } | |
8991 | static int set_ro(const char *val, struct kernel_param *kp) | |
8992 | { | |
4c9309c0 | 8993 | return kstrtouint(val, 10, (unsigned int *)&start_readonly); |
f91de92e N |
8994 | } |
8995 | ||
80ca3a44 N |
8996 | module_param_call(start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR); |
8997 | module_param(start_dirty_degraded, int, S_IRUGO|S_IWUSR); | |
efeb53c0 | 8998 | module_param_call(new_array, add_named_array, NULL, NULL, S_IWUSR); |
f91de92e | 8999 | |
1da177e4 | 9000 | MODULE_LICENSE("GPL"); |
0efb9e61 | 9001 | MODULE_DESCRIPTION("MD RAID framework"); |
aa1595e9 | 9002 | MODULE_ALIAS("md"); |
72008652 | 9003 | MODULE_ALIAS_BLOCKDEV_MAJOR(MD_MAJOR); |