Commit | Line | Data |
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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 | ||
3f07c014 | 47 | #include <linux/sched/signal.h> |
a6fb0934 | 48 | #include <linux/kthread.h> |
bff61975 | 49 | #include <linux/blkdev.h> |
fc974ee2 | 50 | #include <linux/badblocks.h> |
1da177e4 | 51 | #include <linux/sysctl.h> |
bff61975 | 52 | #include <linux/seq_file.h> |
ff01bb48 | 53 | #include <linux/fs.h> |
d7603b7e | 54 | #include <linux/poll.h> |
16f17b39 | 55 | #include <linux/ctype.h> |
e7d2860b | 56 | #include <linux/string.h> |
fb4d8c76 N |
57 | #include <linux/hdreg.h> |
58 | #include <linux/proc_fs.h> | |
59 | #include <linux/random.h> | |
056075c7 | 60 | #include <linux/module.h> |
fb4d8c76 | 61 | #include <linux/reboot.h> |
32a7627c | 62 | #include <linux/file.h> |
aa98aa31 | 63 | #include <linux/compat.h> |
25570727 | 64 | #include <linux/delay.h> |
bff61975 N |
65 | #include <linux/raid/md_p.h> |
66 | #include <linux/raid/md_u.h> | |
5a0e3ad6 | 67 | #include <linux/slab.h> |
4ad23a97 N |
68 | #include <linux/percpu-refcount.h> |
69 | ||
504634f6 | 70 | #include <trace/events/block.h> |
43b2e5d8 | 71 | #include "md.h" |
ef740c37 | 72 | #include "bitmap.h" |
edb39c9d | 73 | #include "md-cluster.h" |
1da177e4 | 74 | |
1da177e4 | 75 | #ifndef MODULE |
d710e138 | 76 | static void autostart_arrays(int part); |
1da177e4 LT |
77 | #endif |
78 | ||
01f96c0a N |
79 | /* pers_list is a list of registered personalities protected |
80 | * by pers_lock. | |
81 | * pers_lock does extra service to protect accesses to | |
82 | * mddev->thread when the mutex cannot be held. | |
83 | */ | |
2604b703 | 84 | static LIST_HEAD(pers_list); |
1da177e4 LT |
85 | static DEFINE_SPINLOCK(pers_lock); |
86 | ||
edb39c9d | 87 | struct md_cluster_operations *md_cluster_ops; |
589a1c49 | 88 | EXPORT_SYMBOL(md_cluster_ops); |
edb39c9d GR |
89 | struct module *md_cluster_mod; |
90 | EXPORT_SYMBOL(md_cluster_mod); | |
91 | ||
90b08710 | 92 | static DECLARE_WAIT_QUEUE_HEAD(resync_wait); |
e804ac78 TH |
93 | static struct workqueue_struct *md_wq; |
94 | static struct workqueue_struct *md_misc_wq; | |
90b08710 | 95 | |
746d3207 N |
96 | static int remove_and_add_spares(struct mddev *mddev, |
97 | struct md_rdev *this); | |
5aa61f42 | 98 | static void mddev_detach(struct mddev *mddev); |
746d3207 | 99 | |
1e50915f RB |
100 | /* |
101 | * Default number of read corrections we'll attempt on an rdev | |
102 | * before ejecting it from the array. We divide the read error | |
103 | * count by 2 for every hour elapsed between read errors. | |
104 | */ | |
105 | #define MD_DEFAULT_MAX_CORRECTED_READ_ERRORS 20 | |
1da177e4 LT |
106 | /* |
107 | * Current RAID-1,4,5 parallel reconstruction 'guaranteed speed limit' | |
108 | * is 1000 KB/sec, so the extra system load does not show up that much. | |
109 | * Increase it if you want to have more _guaranteed_ speed. Note that | |
338cec32 | 110 | * the RAID driver will use the maximum available bandwidth if the IO |
1da177e4 LT |
111 | * subsystem is idle. There is also an 'absolute maximum' reconstruction |
112 | * speed limit - in case reconstruction slows down your system despite | |
113 | * idle IO detection. | |
114 | * | |
115 | * you can change it via /proc/sys/dev/raid/speed_limit_min and _max. | |
88202a0c | 116 | * or /sys/block/mdX/md/sync_speed_{min,max} |
1da177e4 LT |
117 | */ |
118 | ||
119 | static int sysctl_speed_limit_min = 1000; | |
120 | static int sysctl_speed_limit_max = 200000; | |
fd01b88c | 121 | static inline int speed_min(struct mddev *mddev) |
88202a0c N |
122 | { |
123 | return mddev->sync_speed_min ? | |
124 | mddev->sync_speed_min : sysctl_speed_limit_min; | |
125 | } | |
126 | ||
fd01b88c | 127 | static inline int speed_max(struct mddev *mddev) |
88202a0c N |
128 | { |
129 | return mddev->sync_speed_max ? | |
130 | mddev->sync_speed_max : sysctl_speed_limit_max; | |
131 | } | |
1da177e4 LT |
132 | |
133 | static struct ctl_table_header *raid_table_header; | |
134 | ||
82592c38 | 135 | static struct ctl_table raid_table[] = { |
1da177e4 | 136 | { |
1da177e4 LT |
137 | .procname = "speed_limit_min", |
138 | .data = &sysctl_speed_limit_min, | |
139 | .maxlen = sizeof(int), | |
80ca3a44 | 140 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 141 | .proc_handler = proc_dointvec, |
1da177e4 LT |
142 | }, |
143 | { | |
1da177e4 LT |
144 | .procname = "speed_limit_max", |
145 | .data = &sysctl_speed_limit_max, | |
146 | .maxlen = sizeof(int), | |
80ca3a44 | 147 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 148 | .proc_handler = proc_dointvec, |
1da177e4 | 149 | }, |
894d2491 | 150 | { } |
1da177e4 LT |
151 | }; |
152 | ||
82592c38 | 153 | static struct ctl_table raid_dir_table[] = { |
1da177e4 | 154 | { |
1da177e4 LT |
155 | .procname = "raid", |
156 | .maxlen = 0, | |
80ca3a44 | 157 | .mode = S_IRUGO|S_IXUGO, |
1da177e4 LT |
158 | .child = raid_table, |
159 | }, | |
894d2491 | 160 | { } |
1da177e4 LT |
161 | }; |
162 | ||
82592c38 | 163 | static struct ctl_table raid_root_table[] = { |
1da177e4 | 164 | { |
1da177e4 LT |
165 | .procname = "dev", |
166 | .maxlen = 0, | |
167 | .mode = 0555, | |
168 | .child = raid_dir_table, | |
169 | }, | |
894d2491 | 170 | { } |
1da177e4 LT |
171 | }; |
172 | ||
83d5cde4 | 173 | static const struct block_device_operations md_fops; |
1da177e4 | 174 | |
f91de92e N |
175 | static int start_readonly; |
176 | ||
78b6350d N |
177 | /* |
178 | * The original mechanism for creating an md device is to create | |
179 | * a device node in /dev and to open it. This causes races with device-close. | |
180 | * The preferred method is to write to the "new_array" module parameter. | |
181 | * This can avoid races. | |
182 | * Setting create_on_open to false disables the original mechanism | |
183 | * so all the races disappear. | |
184 | */ | |
185 | static bool create_on_open = true; | |
186 | ||
a167f663 | 187 | /* bio_clone_mddev |
9b10f6a9 | 188 | * like bio_clone_bioset, but with a local bio set |
a167f663 N |
189 | */ |
190 | ||
a167f663 | 191 | struct bio *bio_alloc_mddev(gfp_t gfp_mask, int nr_iovecs, |
fd01b88c | 192 | struct mddev *mddev) |
a167f663 N |
193 | { |
194 | struct bio *b; | |
a167f663 N |
195 | |
196 | if (!mddev || !mddev->bio_set) | |
197 | return bio_alloc(gfp_mask, nr_iovecs); | |
198 | ||
395c72a7 | 199 | b = bio_alloc_bioset(gfp_mask, nr_iovecs, mddev->bio_set); |
a167f663 N |
200 | if (!b) |
201 | return NULL; | |
a167f663 N |
202 | return b; |
203 | } | |
204 | EXPORT_SYMBOL_GPL(bio_alloc_mddev); | |
205 | ||
5a85071c N |
206 | static struct bio *md_bio_alloc_sync(struct mddev *mddev) |
207 | { | |
7f053a6a | 208 | if (!mddev || !mddev->sync_set) |
5a85071c N |
209 | return bio_alloc(GFP_NOIO, 1); |
210 | ||
211 | return bio_alloc_bioset(GFP_NOIO, 1, mddev->sync_set); | |
212 | } | |
213 | ||
d7603b7e N |
214 | /* |
215 | * We have a system wide 'event count' that is incremented | |
216 | * on any 'interesting' event, and readers of /proc/mdstat | |
217 | * can use 'poll' or 'select' to find out when the event | |
218 | * count increases. | |
219 | * | |
220 | * Events are: | |
221 | * start array, stop array, error, add device, remove device, | |
222 | * start build, activate spare | |
223 | */ | |
2989ddbd | 224 | static DECLARE_WAIT_QUEUE_HEAD(md_event_waiters); |
d7603b7e | 225 | static atomic_t md_event_count; |
fd01b88c | 226 | void md_new_event(struct mddev *mddev) |
d7603b7e N |
227 | { |
228 | atomic_inc(&md_event_count); | |
229 | wake_up(&md_event_waiters); | |
230 | } | |
29269553 | 231 | EXPORT_SYMBOL_GPL(md_new_event); |
d7603b7e | 232 | |
1da177e4 LT |
233 | /* |
234 | * Enables to iterate over all existing md arrays | |
235 | * all_mddevs_lock protects this list. | |
236 | */ | |
237 | static LIST_HEAD(all_mddevs); | |
238 | static DEFINE_SPINLOCK(all_mddevs_lock); | |
239 | ||
1da177e4 LT |
240 | /* |
241 | * iterates through all used mddevs in the system. | |
242 | * We take care to grab the all_mddevs_lock whenever navigating | |
243 | * the list, and to always hold a refcount when unlocked. | |
244 | * Any code which breaks out of this loop while own | |
245 | * a reference to the current mddev and must mddev_put it. | |
246 | */ | |
fd01b88c | 247 | #define for_each_mddev(_mddev,_tmp) \ |
1da177e4 | 248 | \ |
f72ffdd6 | 249 | for (({ spin_lock(&all_mddevs_lock); \ |
fd01b88c N |
250 | _tmp = all_mddevs.next; \ |
251 | _mddev = NULL;}); \ | |
252 | ({ if (_tmp != &all_mddevs) \ | |
253 | mddev_get(list_entry(_tmp, struct mddev, all_mddevs));\ | |
1da177e4 | 254 | spin_unlock(&all_mddevs_lock); \ |
fd01b88c N |
255 | if (_mddev) mddev_put(_mddev); \ |
256 | _mddev = list_entry(_tmp, struct mddev, all_mddevs); \ | |
257 | _tmp != &all_mddevs;}); \ | |
1da177e4 | 258 | ({ spin_lock(&all_mddevs_lock); \ |
fd01b88c | 259 | _tmp = _tmp->next;}) \ |
1da177e4 LT |
260 | ) |
261 | ||
409c57f3 N |
262 | /* Rather than calling directly into the personality make_request function, |
263 | * IO requests come here first so that we can check if the device is | |
264 | * being suspended pending a reconfiguration. | |
265 | * We hold a refcount over the call to ->make_request. By the time that | |
266 | * call has finished, the bio has been linked into some internal structure | |
267 | * and so is visible to ->quiesce(), so we don't need the refcount any more. | |
268 | */ | |
dece1635 | 269 | static blk_qc_t md_make_request(struct request_queue *q, struct bio *bio) |
1da177e4 | 270 | { |
49077326 | 271 | const int rw = bio_data_dir(bio); |
fd01b88c | 272 | struct mddev *mddev = q->queuedata; |
e91ece55 | 273 | unsigned int sectors; |
74672d06 | 274 | int cpu; |
49077326 | 275 | |
af67c31f | 276 | blk_queue_split(q, &bio); |
54efd50b | 277 | |
274d8cbd | 278 | if (mddev == NULL || mddev->pers == NULL) { |
409c57f3 | 279 | bio_io_error(bio); |
dece1635 | 280 | return BLK_QC_T_NONE; |
409c57f3 | 281 | } |
bbfa57c0 | 282 | if (mddev->ro == 1 && unlikely(rw == WRITE)) { |
4246a0b6 | 283 | if (bio_sectors(bio) != 0) |
4e4cbee9 | 284 | bio->bi_status = BLK_STS_IOERR; |
4246a0b6 | 285 | bio_endio(bio); |
dece1635 | 286 | return BLK_QC_T_NONE; |
bbfa57c0 | 287 | } |
cc27b0c7 | 288 | check_suspended: |
409c57f3 | 289 | rcu_read_lock(); |
e9c7469b | 290 | if (mddev->suspended) { |
409c57f3 N |
291 | DEFINE_WAIT(__wait); |
292 | for (;;) { | |
293 | prepare_to_wait(&mddev->sb_wait, &__wait, | |
294 | TASK_UNINTERRUPTIBLE); | |
e9c7469b | 295 | if (!mddev->suspended) |
409c57f3 N |
296 | break; |
297 | rcu_read_unlock(); | |
298 | schedule(); | |
299 | rcu_read_lock(); | |
300 | } | |
301 | finish_wait(&mddev->sb_wait, &__wait); | |
302 | } | |
303 | atomic_inc(&mddev->active_io); | |
304 | rcu_read_unlock(); | |
49077326 | 305 | |
e91ece55 CM |
306 | /* |
307 | * save the sectors now since our bio can | |
308 | * go away inside make_request | |
309 | */ | |
310 | sectors = bio_sectors(bio); | |
9c573de3 | 311 | /* bio could be mergeable after passing to underlayer */ |
1eff9d32 | 312 | bio->bi_opf &= ~REQ_NOMERGE; |
cc27b0c7 N |
313 | if (!mddev->pers->make_request(mddev, bio)) { |
314 | atomic_dec(&mddev->active_io); | |
315 | wake_up(&mddev->sb_wait); | |
316 | goto check_suspended; | |
317 | } | |
49077326 | 318 | |
74672d06 GZ |
319 | cpu = part_stat_lock(); |
320 | part_stat_inc(cpu, &mddev->gendisk->part0, ios[rw]); | |
321 | part_stat_add(cpu, &mddev->gendisk->part0, sectors[rw], sectors); | |
322 | part_stat_unlock(); | |
49077326 | 323 | |
409c57f3 N |
324 | if (atomic_dec_and_test(&mddev->active_io) && mddev->suspended) |
325 | wake_up(&mddev->sb_wait); | |
dece1635 JA |
326 | |
327 | return BLK_QC_T_NONE; | |
409c57f3 N |
328 | } |
329 | ||
9e35b99c N |
330 | /* mddev_suspend makes sure no new requests are submitted |
331 | * to the device, and that any requests that have been submitted | |
332 | * are completely handled. | |
afa0f557 N |
333 | * Once mddev_detach() is called and completes, the module will be |
334 | * completely unused. | |
9e35b99c | 335 | */ |
fd01b88c | 336 | void mddev_suspend(struct mddev *mddev) |
409c57f3 | 337 | { |
092398dc | 338 | WARN_ON_ONCE(mddev->thread && current == mddev->thread->tsk); |
0dc10e50 MP |
339 | if (mddev->suspended++) |
340 | return; | |
409c57f3 | 341 | synchronize_rcu(); |
cc27b0c7 | 342 | wake_up(&mddev->sb_wait); |
409c57f3 N |
343 | wait_event(mddev->sb_wait, atomic_read(&mddev->active_io) == 0); |
344 | mddev->pers->quiesce(mddev, 1); | |
0d9f4f13 JB |
345 | |
346 | del_timer_sync(&mddev->safemode_timer); | |
409c57f3 | 347 | } |
390ee602 | 348 | EXPORT_SYMBOL_GPL(mddev_suspend); |
409c57f3 | 349 | |
fd01b88c | 350 | void mddev_resume(struct mddev *mddev) |
409c57f3 | 351 | { |
0dc10e50 MP |
352 | if (--mddev->suspended) |
353 | return; | |
409c57f3 N |
354 | wake_up(&mddev->sb_wait); |
355 | mddev->pers->quiesce(mddev, 0); | |
0fd018af | 356 | |
47525e59 | 357 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
0fd018af JB |
358 | md_wakeup_thread(mddev->thread); |
359 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
1da177e4 | 360 | } |
390ee602 | 361 | EXPORT_SYMBOL_GPL(mddev_resume); |
1da177e4 | 362 | |
fd01b88c | 363 | int mddev_congested(struct mddev *mddev, int bits) |
3fa841d7 | 364 | { |
5c675f83 N |
365 | struct md_personality *pers = mddev->pers; |
366 | int ret = 0; | |
367 | ||
368 | rcu_read_lock(); | |
369 | if (mddev->suspended) | |
370 | ret = 1; | |
371 | else if (pers && pers->congested) | |
372 | ret = pers->congested(mddev, bits); | |
373 | rcu_read_unlock(); | |
374 | return ret; | |
375 | } | |
376 | EXPORT_SYMBOL_GPL(mddev_congested); | |
377 | static int md_congested(void *data, int bits) | |
378 | { | |
379 | struct mddev *mddev = data; | |
380 | return mddev_congested(mddev, bits); | |
3fa841d7 | 381 | } |
3fa841d7 | 382 | |
a2826aa9 | 383 | /* |
e9c7469b | 384 | * Generic flush handling for md |
a2826aa9 N |
385 | */ |
386 | ||
4246a0b6 | 387 | static void md_end_flush(struct bio *bio) |
a2826aa9 | 388 | { |
3cb03002 | 389 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 390 | struct mddev *mddev = rdev->mddev; |
a2826aa9 N |
391 | |
392 | rdev_dec_pending(rdev, mddev); | |
393 | ||
394 | if (atomic_dec_and_test(&mddev->flush_pending)) { | |
e9c7469b | 395 | /* The pre-request flush has finished */ |
e804ac78 | 396 | queue_work(md_wq, &mddev->flush_work); |
a2826aa9 N |
397 | } |
398 | bio_put(bio); | |
399 | } | |
400 | ||
a7a07e69 N |
401 | static void md_submit_flush_data(struct work_struct *ws); |
402 | ||
a035fc3e | 403 | static void submit_flushes(struct work_struct *ws) |
a2826aa9 | 404 | { |
fd01b88c | 405 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); |
3cb03002 | 406 | struct md_rdev *rdev; |
a2826aa9 | 407 | |
a7a07e69 N |
408 | INIT_WORK(&mddev->flush_work, md_submit_flush_data); |
409 | atomic_set(&mddev->flush_pending, 1); | |
a2826aa9 | 410 | rcu_read_lock(); |
dafb20fa | 411 | rdev_for_each_rcu(rdev, mddev) |
a2826aa9 N |
412 | if (rdev->raid_disk >= 0 && |
413 | !test_bit(Faulty, &rdev->flags)) { | |
414 | /* Take two references, one is dropped | |
415 | * when request finishes, one after | |
416 | * we reclaim rcu_read_lock | |
417 | */ | |
418 | struct bio *bi; | |
419 | atomic_inc(&rdev->nr_pending); | |
420 | atomic_inc(&rdev->nr_pending); | |
421 | rcu_read_unlock(); | |
b5e1b8ce | 422 | bi = bio_alloc_mddev(GFP_NOIO, 0, mddev); |
e9c7469b | 423 | bi->bi_end_io = md_end_flush; |
a2826aa9 N |
424 | bi->bi_private = rdev; |
425 | bi->bi_bdev = rdev->bdev; | |
70fd7614 | 426 | bi->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH; |
a2826aa9 | 427 | atomic_inc(&mddev->flush_pending); |
4e49ea4a | 428 | submit_bio(bi); |
a2826aa9 N |
429 | rcu_read_lock(); |
430 | rdev_dec_pending(rdev, mddev); | |
431 | } | |
432 | rcu_read_unlock(); | |
a7a07e69 N |
433 | if (atomic_dec_and_test(&mddev->flush_pending)) |
434 | queue_work(md_wq, &mddev->flush_work); | |
a2826aa9 N |
435 | } |
436 | ||
e9c7469b | 437 | static void md_submit_flush_data(struct work_struct *ws) |
a2826aa9 | 438 | { |
fd01b88c | 439 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); |
e9c7469b | 440 | struct bio *bio = mddev->flush_bio; |
a2826aa9 | 441 | |
4f024f37 | 442 | if (bio->bi_iter.bi_size == 0) |
a2826aa9 | 443 | /* an empty barrier - all done */ |
4246a0b6 | 444 | bio_endio(bio); |
a2826aa9 | 445 | else { |
1eff9d32 | 446 | bio->bi_opf &= ~REQ_PREFLUSH; |
5a7bbad2 | 447 | mddev->pers->make_request(mddev, bio); |
a2826aa9 | 448 | } |
2b74e12e N |
449 | |
450 | mddev->flush_bio = NULL; | |
451 | wake_up(&mddev->sb_wait); | |
a2826aa9 N |
452 | } |
453 | ||
fd01b88c | 454 | void md_flush_request(struct mddev *mddev, struct bio *bio) |
a2826aa9 | 455 | { |
85572d7c | 456 | spin_lock_irq(&mddev->lock); |
a2826aa9 | 457 | wait_event_lock_irq(mddev->sb_wait, |
e9c7469b | 458 | !mddev->flush_bio, |
85572d7c | 459 | mddev->lock); |
e9c7469b | 460 | mddev->flush_bio = bio; |
85572d7c | 461 | spin_unlock_irq(&mddev->lock); |
a2826aa9 | 462 | |
a035fc3e N |
463 | INIT_WORK(&mddev->flush_work, submit_flushes); |
464 | queue_work(md_wq, &mddev->flush_work); | |
a2826aa9 | 465 | } |
e9c7469b | 466 | EXPORT_SYMBOL(md_flush_request); |
409c57f3 | 467 | |
fd01b88c | 468 | static inline struct mddev *mddev_get(struct mddev *mddev) |
1da177e4 LT |
469 | { |
470 | atomic_inc(&mddev->active); | |
471 | return mddev; | |
472 | } | |
473 | ||
5fd3a17e | 474 | static void mddev_delayed_delete(struct work_struct *ws); |
d3374825 | 475 | |
fd01b88c | 476 | static void mddev_put(struct mddev *mddev) |
1da177e4 | 477 | { |
7184ef8b | 478 | struct bio_set *bs = NULL, *sync_bs = NULL; |
a167f663 | 479 | |
1da177e4 LT |
480 | if (!atomic_dec_and_lock(&mddev->active, &all_mddevs_lock)) |
481 | return; | |
d3374825 | 482 | if (!mddev->raid_disks && list_empty(&mddev->disks) && |
cbd19983 N |
483 | mddev->ctime == 0 && !mddev->hold_active) { |
484 | /* Array is not configured at all, and not held active, | |
485 | * so destroy it */ | |
af8a2434 | 486 | list_del_init(&mddev->all_mddevs); |
a167f663 | 487 | bs = mddev->bio_set; |
7184ef8b | 488 | sync_bs = mddev->sync_set; |
a167f663 | 489 | mddev->bio_set = NULL; |
5a85071c | 490 | mddev->sync_set = NULL; |
d3374825 | 491 | if (mddev->gendisk) { |
e804ac78 TH |
492 | /* We did a probe so need to clean up. Call |
493 | * queue_work inside the spinlock so that | |
494 | * flush_workqueue() after mddev_find will | |
495 | * succeed in waiting for the work to be done. | |
d3374825 N |
496 | */ |
497 | INIT_WORK(&mddev->del_work, mddev_delayed_delete); | |
e804ac78 | 498 | queue_work(md_misc_wq, &mddev->del_work); |
d3374825 N |
499 | } else |
500 | kfree(mddev); | |
501 | } | |
502 | spin_unlock(&all_mddevs_lock); | |
a167f663 N |
503 | if (bs) |
504 | bioset_free(bs); | |
7184ef8b SL |
505 | if (sync_bs) |
506 | bioset_free(sync_bs); | |
1da177e4 LT |
507 | } |
508 | ||
25b2edfa SL |
509 | static void md_safemode_timeout(unsigned long data); |
510 | ||
fd01b88c | 511 | void mddev_init(struct mddev *mddev) |
fafd7fb0 N |
512 | { |
513 | mutex_init(&mddev->open_mutex); | |
514 | mutex_init(&mddev->reconfig_mutex); | |
515 | mutex_init(&mddev->bitmap_info.mutex); | |
516 | INIT_LIST_HEAD(&mddev->disks); | |
517 | INIT_LIST_HEAD(&mddev->all_mddevs); | |
25b2edfa SL |
518 | setup_timer(&mddev->safemode_timer, md_safemode_timeout, |
519 | (unsigned long) mddev); | |
fafd7fb0 N |
520 | atomic_set(&mddev->active, 1); |
521 | atomic_set(&mddev->openers, 0); | |
522 | atomic_set(&mddev->active_io, 0); | |
85572d7c | 523 | spin_lock_init(&mddev->lock); |
fafd7fb0 N |
524 | atomic_set(&mddev->flush_pending, 0); |
525 | init_waitqueue_head(&mddev->sb_wait); | |
526 | init_waitqueue_head(&mddev->recovery_wait); | |
527 | mddev->reshape_position = MaxSector; | |
2c810cdd | 528 | mddev->reshape_backwards = 0; |
c4a39551 | 529 | mddev->last_sync_action = "none"; |
fafd7fb0 N |
530 | mddev->resync_min = 0; |
531 | mddev->resync_max = MaxSector; | |
532 | mddev->level = LEVEL_NONE; | |
533 | } | |
390ee602 | 534 | EXPORT_SYMBOL_GPL(mddev_init); |
fafd7fb0 | 535 | |
f72ffdd6 | 536 | static struct mddev *mddev_find(dev_t unit) |
1da177e4 | 537 | { |
fd01b88c | 538 | struct mddev *mddev, *new = NULL; |
1da177e4 | 539 | |
8f5f02c4 N |
540 | if (unit && MAJOR(unit) != MD_MAJOR) |
541 | unit &= ~((1<<MdpMinorShift)-1); | |
542 | ||
1da177e4 LT |
543 | retry: |
544 | spin_lock(&all_mddevs_lock); | |
efeb53c0 N |
545 | |
546 | if (unit) { | |
547 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
548 | if (mddev->unit == unit) { | |
549 | mddev_get(mddev); | |
550 | spin_unlock(&all_mddevs_lock); | |
551 | kfree(new); | |
552 | return mddev; | |
553 | } | |
554 | ||
555 | if (new) { | |
556 | list_add(&new->all_mddevs, &all_mddevs); | |
1da177e4 | 557 | spin_unlock(&all_mddevs_lock); |
efeb53c0 N |
558 | new->hold_active = UNTIL_IOCTL; |
559 | return new; | |
1da177e4 | 560 | } |
efeb53c0 N |
561 | } else if (new) { |
562 | /* find an unused unit number */ | |
563 | static int next_minor = 512; | |
564 | int start = next_minor; | |
565 | int is_free = 0; | |
566 | int dev = 0; | |
567 | while (!is_free) { | |
568 | dev = MKDEV(MD_MAJOR, next_minor); | |
569 | next_minor++; | |
570 | if (next_minor > MINORMASK) | |
571 | next_minor = 0; | |
572 | if (next_minor == start) { | |
573 | /* Oh dear, all in use. */ | |
574 | spin_unlock(&all_mddevs_lock); | |
575 | kfree(new); | |
576 | return NULL; | |
577 | } | |
f72ffdd6 | 578 | |
efeb53c0 N |
579 | is_free = 1; |
580 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
581 | if (mddev->unit == dev) { | |
582 | is_free = 0; | |
583 | break; | |
584 | } | |
585 | } | |
586 | new->unit = dev; | |
587 | new->md_minor = MINOR(dev); | |
588 | new->hold_active = UNTIL_STOP; | |
1da177e4 LT |
589 | list_add(&new->all_mddevs, &all_mddevs); |
590 | spin_unlock(&all_mddevs_lock); | |
591 | return new; | |
592 | } | |
593 | spin_unlock(&all_mddevs_lock); | |
594 | ||
9ffae0cf | 595 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
1da177e4 LT |
596 | if (!new) |
597 | return NULL; | |
598 | ||
1da177e4 LT |
599 | new->unit = unit; |
600 | if (MAJOR(unit) == MD_MAJOR) | |
601 | new->md_minor = MINOR(unit); | |
602 | else | |
603 | new->md_minor = MINOR(unit) >> MdpMinorShift; | |
604 | ||
fafd7fb0 | 605 | mddev_init(new); |
1da177e4 | 606 | |
1da177e4 LT |
607 | goto retry; |
608 | } | |
609 | ||
b6eb127d N |
610 | static struct attribute_group md_redundancy_group; |
611 | ||
5c47daf6 | 612 | void mddev_unlock(struct mddev *mddev) |
1da177e4 | 613 | { |
a64c876f | 614 | if (mddev->to_remove) { |
b6eb127d N |
615 | /* These cannot be removed under reconfig_mutex as |
616 | * an access to the files will try to take reconfig_mutex | |
617 | * while holding the file unremovable, which leads to | |
618 | * a deadlock. | |
bb4f1e9d N |
619 | * So hold set sysfs_active while the remove in happeing, |
620 | * and anything else which might set ->to_remove or my | |
621 | * otherwise change the sysfs namespace will fail with | |
622 | * -EBUSY if sysfs_active is still set. | |
623 | * We set sysfs_active under reconfig_mutex and elsewhere | |
624 | * test it under the same mutex to ensure its correct value | |
625 | * is seen. | |
b6eb127d | 626 | */ |
a64c876f N |
627 | struct attribute_group *to_remove = mddev->to_remove; |
628 | mddev->to_remove = NULL; | |
bb4f1e9d | 629 | mddev->sysfs_active = 1; |
b6eb127d N |
630 | mutex_unlock(&mddev->reconfig_mutex); |
631 | ||
00bcb4ac N |
632 | if (mddev->kobj.sd) { |
633 | if (to_remove != &md_redundancy_group) | |
634 | sysfs_remove_group(&mddev->kobj, to_remove); | |
635 | if (mddev->pers == NULL || | |
636 | mddev->pers->sync_request == NULL) { | |
637 | sysfs_remove_group(&mddev->kobj, &md_redundancy_group); | |
638 | if (mddev->sysfs_action) | |
639 | sysfs_put(mddev->sysfs_action); | |
640 | mddev->sysfs_action = NULL; | |
641 | } | |
a64c876f | 642 | } |
bb4f1e9d | 643 | mddev->sysfs_active = 0; |
b6eb127d N |
644 | } else |
645 | mutex_unlock(&mddev->reconfig_mutex); | |
1da177e4 | 646 | |
751e67ca CD |
647 | /* As we've dropped the mutex we need a spinlock to |
648 | * make sure the thread doesn't disappear | |
01f96c0a N |
649 | */ |
650 | spin_lock(&pers_lock); | |
005eca5e | 651 | md_wakeup_thread(mddev->thread); |
01f96c0a | 652 | spin_unlock(&pers_lock); |
1da177e4 | 653 | } |
5c47daf6 | 654 | EXPORT_SYMBOL_GPL(mddev_unlock); |
1da177e4 | 655 | |
57d051dc | 656 | struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr) |
1ca69c4b N |
657 | { |
658 | struct md_rdev *rdev; | |
659 | ||
660 | rdev_for_each_rcu(rdev, mddev) | |
661 | if (rdev->desc_nr == nr) | |
662 | return rdev; | |
663 | ||
664 | return NULL; | |
665 | } | |
57d051dc | 666 | EXPORT_SYMBOL_GPL(md_find_rdev_nr_rcu); |
1ca69c4b N |
667 | |
668 | static struct md_rdev *find_rdev(struct mddev *mddev, dev_t dev) | |
1da177e4 | 669 | { |
3cb03002 | 670 | struct md_rdev *rdev; |
1da177e4 | 671 | |
dafb20fa | 672 | rdev_for_each(rdev, mddev) |
1da177e4 LT |
673 | if (rdev->bdev->bd_dev == dev) |
674 | return rdev; | |
159ec1fc | 675 | |
1da177e4 LT |
676 | return NULL; |
677 | } | |
678 | ||
1ca69c4b N |
679 | static struct md_rdev *find_rdev_rcu(struct mddev *mddev, dev_t dev) |
680 | { | |
681 | struct md_rdev *rdev; | |
682 | ||
683 | rdev_for_each_rcu(rdev, mddev) | |
684 | if (rdev->bdev->bd_dev == dev) | |
685 | return rdev; | |
686 | ||
687 | return NULL; | |
688 | } | |
689 | ||
84fc4b56 | 690 | static struct md_personality *find_pers(int level, char *clevel) |
2604b703 | 691 | { |
84fc4b56 | 692 | struct md_personality *pers; |
d9d166c2 N |
693 | list_for_each_entry(pers, &pers_list, list) { |
694 | if (level != LEVEL_NONE && pers->level == level) | |
2604b703 | 695 | return pers; |
d9d166c2 N |
696 | if (strcmp(pers->name, clevel)==0) |
697 | return pers; | |
698 | } | |
2604b703 N |
699 | return NULL; |
700 | } | |
701 | ||
b73df2d3 | 702 | /* return the offset of the super block in 512byte sectors */ |
3cb03002 | 703 | static inline sector_t calc_dev_sboffset(struct md_rdev *rdev) |
1da177e4 | 704 | { |
57b2caa3 | 705 | sector_t num_sectors = i_size_read(rdev->bdev->bd_inode) / 512; |
b73df2d3 | 706 | return MD_NEW_SIZE_SECTORS(num_sectors); |
1da177e4 LT |
707 | } |
708 | ||
f72ffdd6 | 709 | static int alloc_disk_sb(struct md_rdev *rdev) |
1da177e4 | 710 | { |
1da177e4 | 711 | rdev->sb_page = alloc_page(GFP_KERNEL); |
7f0f0d87 | 712 | if (!rdev->sb_page) |
ebc24337 | 713 | return -ENOMEM; |
1da177e4 LT |
714 | return 0; |
715 | } | |
716 | ||
545c8795 | 717 | void md_rdev_clear(struct md_rdev *rdev) |
1da177e4 LT |
718 | { |
719 | if (rdev->sb_page) { | |
2d1f3b5d | 720 | put_page(rdev->sb_page); |
1da177e4 LT |
721 | rdev->sb_loaded = 0; |
722 | rdev->sb_page = NULL; | |
0f420358 | 723 | rdev->sb_start = 0; |
dd8ac336 | 724 | rdev->sectors = 0; |
1da177e4 | 725 | } |
2699b672 N |
726 | if (rdev->bb_page) { |
727 | put_page(rdev->bb_page); | |
728 | rdev->bb_page = NULL; | |
729 | } | |
d3b407fb | 730 | badblocks_exit(&rdev->badblocks); |
1da177e4 | 731 | } |
545c8795 | 732 | EXPORT_SYMBOL_GPL(md_rdev_clear); |
1da177e4 | 733 | |
4246a0b6 | 734 | static void super_written(struct bio *bio) |
7bfa19f2 | 735 | { |
3cb03002 | 736 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 737 | struct mddev *mddev = rdev->mddev; |
7bfa19f2 | 738 | |
4e4cbee9 CH |
739 | if (bio->bi_status) { |
740 | pr_err("md: super_written gets error=%d\n", bio->bi_status); | |
a9701a30 | 741 | md_error(mddev, rdev); |
46533ff7 N |
742 | if (!test_bit(Faulty, &rdev->flags) |
743 | && (bio->bi_opf & MD_FAILFAST)) { | |
2953079c | 744 | set_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags); |
46533ff7 N |
745 | set_bit(LastDev, &rdev->flags); |
746 | } | |
747 | } else | |
748 | clear_bit(LastDev, &rdev->flags); | |
7bfa19f2 | 749 | |
a9701a30 N |
750 | if (atomic_dec_and_test(&mddev->pending_writes)) |
751 | wake_up(&mddev->sb_wait); | |
ed3b98c7 | 752 | rdev_dec_pending(rdev, mddev); |
f8b58edf | 753 | bio_put(bio); |
7bfa19f2 N |
754 | } |
755 | ||
fd01b88c | 756 | void md_super_write(struct mddev *mddev, struct md_rdev *rdev, |
7bfa19f2 N |
757 | sector_t sector, int size, struct page *page) |
758 | { | |
759 | /* write first size bytes of page to sector of rdev | |
760 | * Increment mddev->pending_writes before returning | |
761 | * and decrement it on completion, waking up sb_wait | |
762 | * if zero is reached. | |
763 | * If an error occurred, call md_error | |
764 | */ | |
46533ff7 N |
765 | struct bio *bio; |
766 | int ff = 0; | |
767 | ||
768 | if (test_bit(Faulty, &rdev->flags)) | |
769 | return; | |
770 | ||
5a85071c | 771 | bio = md_bio_alloc_sync(mddev); |
7bfa19f2 | 772 | |
ed3b98c7 SL |
773 | atomic_inc(&rdev->nr_pending); |
774 | ||
a6ff7e08 | 775 | bio->bi_bdev = rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev; |
4f024f37 | 776 | bio->bi_iter.bi_sector = sector; |
7bfa19f2 N |
777 | bio_add_page(bio, page, size, 0); |
778 | bio->bi_private = rdev; | |
779 | bio->bi_end_io = super_written; | |
46533ff7 N |
780 | |
781 | if (test_bit(MD_FAILFAST_SUPPORTED, &mddev->flags) && | |
782 | test_bit(FailFast, &rdev->flags) && | |
783 | !test_bit(LastDev, &rdev->flags)) | |
784 | ff = MD_FAILFAST; | |
5a8948f8 | 785 | bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH | REQ_FUA | ff; |
a9701a30 | 786 | |
7bfa19f2 | 787 | atomic_inc(&mddev->pending_writes); |
4e49ea4a | 788 | submit_bio(bio); |
a9701a30 N |
789 | } |
790 | ||
46533ff7 | 791 | int md_super_wait(struct mddev *mddev) |
a9701a30 | 792 | { |
e9c7469b | 793 | /* wait for all superblock writes that were scheduled to complete */ |
1967cd56 | 794 | wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0); |
2953079c | 795 | if (test_and_clear_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags)) |
46533ff7 N |
796 | return -EAGAIN; |
797 | return 0; | |
7bfa19f2 N |
798 | } |
799 | ||
3cb03002 | 800 | int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, |
796a5cf0 | 801 | struct page *page, int op, int op_flags, bool metadata_op) |
1da177e4 | 802 | { |
5a85071c | 803 | struct bio *bio = md_bio_alloc_sync(rdev->mddev); |
1da177e4 LT |
804 | int ret; |
805 | ||
a6ff7e08 JB |
806 | bio->bi_bdev = (metadata_op && rdev->meta_bdev) ? |
807 | rdev->meta_bdev : rdev->bdev; | |
796a5cf0 | 808 | bio_set_op_attrs(bio, op, op_flags); |
ccebd4c4 | 809 | if (metadata_op) |
4f024f37 | 810 | bio->bi_iter.bi_sector = sector + rdev->sb_start; |
1fdd6fc9 N |
811 | else if (rdev->mddev->reshape_position != MaxSector && |
812 | (rdev->mddev->reshape_backwards == | |
813 | (sector >= rdev->mddev->reshape_position))) | |
4f024f37 | 814 | bio->bi_iter.bi_sector = sector + rdev->new_data_offset; |
ccebd4c4 | 815 | else |
4f024f37 | 816 | bio->bi_iter.bi_sector = sector + rdev->data_offset; |
1da177e4 | 817 | bio_add_page(bio, page, size, 0); |
4e49ea4a MC |
818 | |
819 | submit_bio_wait(bio); | |
1da177e4 | 820 | |
4e4cbee9 | 821 | ret = !bio->bi_status; |
1da177e4 LT |
822 | bio_put(bio); |
823 | return ret; | |
824 | } | |
a8745db2 | 825 | EXPORT_SYMBOL_GPL(sync_page_io); |
1da177e4 | 826 | |
f72ffdd6 | 827 | static int read_disk_sb(struct md_rdev *rdev, int size) |
1da177e4 LT |
828 | { |
829 | char b[BDEVNAME_SIZE]; | |
403df478 | 830 | |
1da177e4 LT |
831 | if (rdev->sb_loaded) |
832 | return 0; | |
833 | ||
796a5cf0 | 834 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, REQ_OP_READ, 0, true)) |
1da177e4 LT |
835 | goto fail; |
836 | rdev->sb_loaded = 1; | |
837 | return 0; | |
838 | ||
839 | fail: | |
9d48739e N |
840 | pr_err("md: disabled device %s, could not read superblock.\n", |
841 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
842 | return -EINVAL; |
843 | } | |
844 | ||
e6fd2093 | 845 | static int md_uuid_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 | 846 | { |
f72ffdd6 | 847 | return sb1->set_uuid0 == sb2->set_uuid0 && |
05710466 AN |
848 | sb1->set_uuid1 == sb2->set_uuid1 && |
849 | sb1->set_uuid2 == sb2->set_uuid2 && | |
850 | sb1->set_uuid3 == sb2->set_uuid3; | |
1da177e4 LT |
851 | } |
852 | ||
e6fd2093 | 853 | static int md_sb_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 LT |
854 | { |
855 | int ret; | |
856 | mdp_super_t *tmp1, *tmp2; | |
857 | ||
858 | tmp1 = kmalloc(sizeof(*tmp1),GFP_KERNEL); | |
859 | tmp2 = kmalloc(sizeof(*tmp2),GFP_KERNEL); | |
860 | ||
861 | if (!tmp1 || !tmp2) { | |
862 | ret = 0; | |
1da177e4 LT |
863 | goto abort; |
864 | } | |
865 | ||
866 | *tmp1 = *sb1; | |
867 | *tmp2 = *sb2; | |
868 | ||
869 | /* | |
870 | * nr_disks is not constant | |
871 | */ | |
872 | tmp1->nr_disks = 0; | |
873 | tmp2->nr_disks = 0; | |
874 | ||
ce0c8e05 | 875 | ret = (memcmp(tmp1, tmp2, MD_SB_GENERIC_CONSTANT_WORDS * 4) == 0); |
1da177e4 | 876 | abort: |
990a8baf JJ |
877 | kfree(tmp1); |
878 | kfree(tmp2); | |
1da177e4 LT |
879 | return ret; |
880 | } | |
881 | ||
4d167f09 N |
882 | static u32 md_csum_fold(u32 csum) |
883 | { | |
884 | csum = (csum & 0xffff) + (csum >> 16); | |
885 | return (csum & 0xffff) + (csum >> 16); | |
886 | } | |
887 | ||
f72ffdd6 | 888 | static unsigned int calc_sb_csum(mdp_super_t *sb) |
1da177e4 | 889 | { |
4d167f09 N |
890 | u64 newcsum = 0; |
891 | u32 *sb32 = (u32*)sb; | |
892 | int i; | |
1da177e4 LT |
893 | unsigned int disk_csum, csum; |
894 | ||
895 | disk_csum = sb->sb_csum; | |
896 | sb->sb_csum = 0; | |
4d167f09 N |
897 | |
898 | for (i = 0; i < MD_SB_BYTES/4 ; i++) | |
899 | newcsum += sb32[i]; | |
900 | csum = (newcsum & 0xffffffff) + (newcsum>>32); | |
901 | ||
4d167f09 N |
902 | #ifdef CONFIG_ALPHA |
903 | /* This used to use csum_partial, which was wrong for several | |
904 | * reasons including that different results are returned on | |
905 | * different architectures. It isn't critical that we get exactly | |
906 | * the same return value as before (we always csum_fold before | |
907 | * testing, and that removes any differences). However as we | |
908 | * know that csum_partial always returned a 16bit value on | |
909 | * alphas, do a fold to maximise conformity to previous behaviour. | |
910 | */ | |
911 | sb->sb_csum = md_csum_fold(disk_csum); | |
912 | #else | |
1da177e4 | 913 | sb->sb_csum = disk_csum; |
4d167f09 | 914 | #endif |
1da177e4 LT |
915 | return csum; |
916 | } | |
917 | ||
1da177e4 LT |
918 | /* |
919 | * Handle superblock details. | |
920 | * We want to be able to handle multiple superblock formats | |
921 | * so we have a common interface to them all, and an array of | |
922 | * different handlers. | |
923 | * We rely on user-space to write the initial superblock, and support | |
924 | * reading and updating of superblocks. | |
925 | * Interface methods are: | |
3cb03002 | 926 | * int load_super(struct md_rdev *dev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
927 | * loads and validates a superblock on dev. |
928 | * if refdev != NULL, compare superblocks on both devices | |
929 | * Return: | |
930 | * 0 - dev has a superblock that is compatible with refdev | |
931 | * 1 - dev has a superblock that is compatible and newer than refdev | |
932 | * so dev should be used as the refdev in future | |
933 | * -EINVAL superblock incompatible or invalid | |
934 | * -othererror e.g. -EIO | |
935 | * | |
fd01b88c | 936 | * int validate_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
937 | * Verify that dev is acceptable into mddev. |
938 | * The first time, mddev->raid_disks will be 0, and data from | |
939 | * dev should be merged in. Subsequent calls check that dev | |
940 | * is new enough. Return 0 or -EINVAL | |
941 | * | |
fd01b88c | 942 | * void sync_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
943 | * Update the superblock for rdev with data in mddev |
944 | * This does not write to disc. | |
945 | * | |
946 | */ | |
947 | ||
948 | struct super_type { | |
0cd17fec CW |
949 | char *name; |
950 | struct module *owner; | |
c6563a8c N |
951 | int (*load_super)(struct md_rdev *rdev, |
952 | struct md_rdev *refdev, | |
0cd17fec | 953 | int minor_version); |
c6563a8c N |
954 | int (*validate_super)(struct mddev *mddev, |
955 | struct md_rdev *rdev); | |
956 | void (*sync_super)(struct mddev *mddev, | |
957 | struct md_rdev *rdev); | |
3cb03002 | 958 | unsigned long long (*rdev_size_change)(struct md_rdev *rdev, |
15f4a5fd | 959 | sector_t num_sectors); |
c6563a8c N |
960 | int (*allow_new_offset)(struct md_rdev *rdev, |
961 | unsigned long long new_offset); | |
1da177e4 LT |
962 | }; |
963 | ||
0894cc30 AN |
964 | /* |
965 | * Check that the given mddev has no bitmap. | |
966 | * | |
967 | * This function is called from the run method of all personalities that do not | |
968 | * support bitmaps. It prints an error message and returns non-zero if mddev | |
969 | * has a bitmap. Otherwise, it returns 0. | |
970 | * | |
971 | */ | |
fd01b88c | 972 | int md_check_no_bitmap(struct mddev *mddev) |
0894cc30 | 973 | { |
c3d9714e | 974 | if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset) |
0894cc30 | 975 | return 0; |
9d48739e | 976 | pr_warn("%s: bitmaps are not supported for %s\n", |
0894cc30 AN |
977 | mdname(mddev), mddev->pers->name); |
978 | return 1; | |
979 | } | |
980 | EXPORT_SYMBOL(md_check_no_bitmap); | |
981 | ||
1da177e4 | 982 | /* |
f72ffdd6 | 983 | * load_super for 0.90.0 |
1da177e4 | 984 | */ |
3cb03002 | 985 | static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
986 | { |
987 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
988 | mdp_super_t *sb; | |
989 | int ret; | |
1da177e4 LT |
990 | |
991 | /* | |
0f420358 | 992 | * Calculate the position of the superblock (512byte sectors), |
1da177e4 LT |
993 | * it's at the end of the disk. |
994 | * | |
995 | * It also happens to be a multiple of 4Kb. | |
996 | */ | |
57b2caa3 | 997 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 998 | |
0002b271 | 999 | ret = read_disk_sb(rdev, MD_SB_BYTES); |
9d48739e N |
1000 | if (ret) |
1001 | return ret; | |
1da177e4 LT |
1002 | |
1003 | ret = -EINVAL; | |
1004 | ||
1005 | bdevname(rdev->bdev, b); | |
65a06f06 | 1006 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1007 | |
1008 | if (sb->md_magic != MD_SB_MAGIC) { | |
9d48739e | 1009 | pr_warn("md: invalid raid superblock magic on %s\n", b); |
1da177e4 LT |
1010 | goto abort; |
1011 | } | |
1012 | ||
1013 | if (sb->major_version != 0 || | |
f6705578 N |
1014 | sb->minor_version < 90 || |
1015 | sb->minor_version > 91) { | |
9d48739e N |
1016 | pr_warn("Bad version number %d.%d on %s\n", |
1017 | sb->major_version, sb->minor_version, b); | |
1da177e4 LT |
1018 | goto abort; |
1019 | } | |
1020 | ||
1021 | if (sb->raid_disks <= 0) | |
1022 | goto abort; | |
1023 | ||
4d167f09 | 1024 | if (md_csum_fold(calc_sb_csum(sb)) != md_csum_fold(sb->sb_csum)) { |
9d48739e | 1025 | pr_warn("md: invalid superblock checksum on %s\n", b); |
1da177e4 LT |
1026 | goto abort; |
1027 | } | |
1028 | ||
1029 | rdev->preferred_minor = sb->md_minor; | |
1030 | rdev->data_offset = 0; | |
c6563a8c | 1031 | rdev->new_data_offset = 0; |
0002b271 | 1032 | rdev->sb_size = MD_SB_BYTES; |
9f2f3830 | 1033 | rdev->badblocks.shift = -1; |
1da177e4 LT |
1034 | |
1035 | if (sb->level == LEVEL_MULTIPATH) | |
1036 | rdev->desc_nr = -1; | |
1037 | else | |
1038 | rdev->desc_nr = sb->this_disk.number; | |
1039 | ||
9a7b2b0f | 1040 | if (!refdev) { |
1da177e4 | 1041 | ret = 1; |
9a7b2b0f | 1042 | } else { |
1da177e4 | 1043 | __u64 ev1, ev2; |
65a06f06 | 1044 | mdp_super_t *refsb = page_address(refdev->sb_page); |
e6fd2093 | 1045 | if (!md_uuid_equal(refsb, sb)) { |
9d48739e | 1046 | pr_warn("md: %s has different UUID to %s\n", |
1da177e4 LT |
1047 | b, bdevname(refdev->bdev,b2)); |
1048 | goto abort; | |
1049 | } | |
e6fd2093 | 1050 | if (!md_sb_equal(refsb, sb)) { |
9d48739e N |
1051 | pr_warn("md: %s has same UUID but different superblock to %s\n", |
1052 | b, bdevname(refdev->bdev, b2)); | |
1da177e4 LT |
1053 | goto abort; |
1054 | } | |
1055 | ev1 = md_event(sb); | |
1056 | ev2 = md_event(refsb); | |
1057 | if (ev1 > ev2) | |
1058 | ret = 1; | |
f72ffdd6 | 1059 | else |
1da177e4 LT |
1060 | ret = 0; |
1061 | } | |
8190e754 | 1062 | rdev->sectors = rdev->sb_start; |
667a5313 N |
1063 | /* Limit to 4TB as metadata cannot record more than that. |
1064 | * (not needed for Linear and RAID0 as metadata doesn't | |
1065 | * record this size) | |
1066 | */ | |
3312c951 AB |
1067 | if (IS_ENABLED(CONFIG_LBDAF) && (u64)rdev->sectors >= (2ULL << 32) && |
1068 | sb->level >= 1) | |
1069 | rdev->sectors = (sector_t)(2ULL << 32) - 2; | |
1da177e4 | 1070 | |
27a7b260 | 1071 | if (rdev->sectors < ((sector_t)sb->size) * 2 && sb->level >= 1) |
2bf071bf N |
1072 | /* "this cannot possibly happen" ... */ |
1073 | ret = -EINVAL; | |
1074 | ||
1da177e4 LT |
1075 | abort: |
1076 | return ret; | |
1077 | } | |
1078 | ||
1079 | /* | |
1080 | * validate_super for 0.90.0 | |
1081 | */ | |
fd01b88c | 1082 | static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1083 | { |
1084 | mdp_disk_t *desc; | |
65a06f06 | 1085 | mdp_super_t *sb = page_address(rdev->sb_page); |
07d84d10 | 1086 | __u64 ev1 = md_event(sb); |
1da177e4 | 1087 | |
41158c7e | 1088 | rdev->raid_disk = -1; |
c5d79adb N |
1089 | clear_bit(Faulty, &rdev->flags); |
1090 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1091 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1092 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1093 | |
1da177e4 LT |
1094 | if (mddev->raid_disks == 0) { |
1095 | mddev->major_version = 0; | |
1096 | mddev->minor_version = sb->minor_version; | |
1097 | mddev->patch_version = sb->patch_version; | |
e691063a | 1098 | mddev->external = 0; |
9d8f0363 | 1099 | mddev->chunk_sectors = sb->chunk_size >> 9; |
1da177e4 LT |
1100 | mddev->ctime = sb->ctime; |
1101 | mddev->utime = sb->utime; | |
1102 | mddev->level = sb->level; | |
d9d166c2 | 1103 | mddev->clevel[0] = 0; |
1da177e4 LT |
1104 | mddev->layout = sb->layout; |
1105 | mddev->raid_disks = sb->raid_disks; | |
27a7b260 | 1106 | mddev->dev_sectors = ((sector_t)sb->size) * 2; |
07d84d10 | 1107 | mddev->events = ev1; |
c3d9714e | 1108 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1109 | mddev->bitmap_info.space = 0; |
1110 | /* bitmap can use 60 K after the 4K superblocks */ | |
c3d9714e | 1111 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 1112 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
2c810cdd | 1113 | mddev->reshape_backwards = 0; |
1da177e4 | 1114 | |
f6705578 N |
1115 | if (mddev->minor_version >= 91) { |
1116 | mddev->reshape_position = sb->reshape_position; | |
1117 | mddev->delta_disks = sb->delta_disks; | |
1118 | mddev->new_level = sb->new_level; | |
1119 | mddev->new_layout = sb->new_layout; | |
664e7c41 | 1120 | mddev->new_chunk_sectors = sb->new_chunk >> 9; |
2c810cdd N |
1121 | if (mddev->delta_disks < 0) |
1122 | mddev->reshape_backwards = 1; | |
f6705578 N |
1123 | } else { |
1124 | mddev->reshape_position = MaxSector; | |
1125 | mddev->delta_disks = 0; | |
1126 | mddev->new_level = mddev->level; | |
1127 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1128 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1129 | } |
1130 | ||
1da177e4 LT |
1131 | if (sb->state & (1<<MD_SB_CLEAN)) |
1132 | mddev->recovery_cp = MaxSector; | |
1133 | else { | |
f72ffdd6 | 1134 | if (sb->events_hi == sb->cp_events_hi && |
1da177e4 LT |
1135 | sb->events_lo == sb->cp_events_lo) { |
1136 | mddev->recovery_cp = sb->recovery_cp; | |
1137 | } else | |
1138 | mddev->recovery_cp = 0; | |
1139 | } | |
1140 | ||
1141 | memcpy(mddev->uuid+0, &sb->set_uuid0, 4); | |
1142 | memcpy(mddev->uuid+4, &sb->set_uuid1, 4); | |
1143 | memcpy(mddev->uuid+8, &sb->set_uuid2, 4); | |
1144 | memcpy(mddev->uuid+12,&sb->set_uuid3, 4); | |
1145 | ||
1146 | mddev->max_disks = MD_SB_DISKS; | |
a654b9d8 N |
1147 | |
1148 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT) && | |
6409bb05 | 1149 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1150 | mddev->bitmap_info.offset = |
1151 | mddev->bitmap_info.default_offset; | |
6409bb05 | 1152 | mddev->bitmap_info.space = |
c9ad020f | 1153 | mddev->bitmap_info.default_space; |
6409bb05 | 1154 | } |
a654b9d8 | 1155 | |
41158c7e | 1156 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1157 | /* Insist on good event counter while assembling, except |
1158 | * for spares (which don't need an event count) */ | |
1da177e4 | 1159 | ++ev1; |
be6800a7 N |
1160 | if (sb->disks[rdev->desc_nr].state & ( |
1161 | (1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE))) | |
f72ffdd6 | 1162 | if (ev1 < mddev->events) |
be6800a7 | 1163 | return -EINVAL; |
41158c7e N |
1164 | } else if (mddev->bitmap) { |
1165 | /* if adding to array with a bitmap, then we can accept an | |
1166 | * older device ... but not too old. | |
1167 | */ | |
41158c7e N |
1168 | if (ev1 < mddev->bitmap->events_cleared) |
1169 | return 0; | |
8313b8e5 N |
1170 | if (ev1 < mddev->events) |
1171 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1172 | } else { |
1173 | if (ev1 < mddev->events) | |
1174 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1175 | return 0; | |
1176 | } | |
41158c7e | 1177 | |
1da177e4 | 1178 | if (mddev->level != LEVEL_MULTIPATH) { |
1da177e4 LT |
1179 | desc = sb->disks + rdev->desc_nr; |
1180 | ||
1181 | if (desc->state & (1<<MD_DISK_FAULTY)) | |
b2d444d7 | 1182 | set_bit(Faulty, &rdev->flags); |
7c7546cc N |
1183 | else if (desc->state & (1<<MD_DISK_SYNC) /* && |
1184 | desc->raid_disk < mddev->raid_disks */) { | |
b2d444d7 | 1185 | set_bit(In_sync, &rdev->flags); |
1da177e4 | 1186 | rdev->raid_disk = desc->raid_disk; |
f466722c | 1187 | rdev->saved_raid_disk = desc->raid_disk; |
0261cd9f N |
1188 | } else if (desc->state & (1<<MD_DISK_ACTIVE)) { |
1189 | /* active but not in sync implies recovery up to | |
1190 | * reshape position. We don't know exactly where | |
1191 | * that is, so set to zero for now */ | |
1192 | if (mddev->minor_version >= 91) { | |
1193 | rdev->recovery_offset = 0; | |
1194 | rdev->raid_disk = desc->raid_disk; | |
1195 | } | |
1da177e4 | 1196 | } |
8ddf9efe N |
1197 | if (desc->state & (1<<MD_DISK_WRITEMOSTLY)) |
1198 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1199 | if (desc->state & (1<<MD_DISK_FAILFAST)) |
1200 | set_bit(FailFast, &rdev->flags); | |
41158c7e | 1201 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1202 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1203 | return 0; |
1204 | } | |
1205 | ||
1206 | /* | |
1207 | * sync_super for 0.90.0 | |
1208 | */ | |
fd01b88c | 1209 | static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1210 | { |
1211 | mdp_super_t *sb; | |
3cb03002 | 1212 | struct md_rdev *rdev2; |
1da177e4 | 1213 | int next_spare = mddev->raid_disks; |
19133a42 | 1214 | |
1da177e4 LT |
1215 | /* make rdev->sb match mddev data.. |
1216 | * | |
1217 | * 1/ zero out disks | |
1218 | * 2/ Add info for each disk, keeping track of highest desc_nr (next_spare); | |
1219 | * 3/ any empty disks < next_spare become removed | |
1220 | * | |
1221 | * disks[0] gets initialised to REMOVED because | |
1222 | * we cannot be sure from other fields if it has | |
1223 | * been initialised or not. | |
1224 | */ | |
1225 | int i; | |
1226 | int active=0, working=0,failed=0,spare=0,nr_disks=0; | |
1227 | ||
61181565 N |
1228 | rdev->sb_size = MD_SB_BYTES; |
1229 | ||
65a06f06 | 1230 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1231 | |
1232 | memset(sb, 0, sizeof(*sb)); | |
1233 | ||
1234 | sb->md_magic = MD_SB_MAGIC; | |
1235 | sb->major_version = mddev->major_version; | |
1da177e4 LT |
1236 | sb->patch_version = mddev->patch_version; |
1237 | sb->gvalid_words = 0; /* ignored */ | |
1238 | memcpy(&sb->set_uuid0, mddev->uuid+0, 4); | |
1239 | memcpy(&sb->set_uuid1, mddev->uuid+4, 4); | |
1240 | memcpy(&sb->set_uuid2, mddev->uuid+8, 4); | |
1241 | memcpy(&sb->set_uuid3, mddev->uuid+12,4); | |
1242 | ||
9ebc6ef1 | 1243 | sb->ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 1244 | sb->level = mddev->level; |
58c0fed4 | 1245 | sb->size = mddev->dev_sectors / 2; |
1da177e4 LT |
1246 | sb->raid_disks = mddev->raid_disks; |
1247 | sb->md_minor = mddev->md_minor; | |
e691063a | 1248 | sb->not_persistent = 0; |
9ebc6ef1 | 1249 | sb->utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
1250 | sb->state = 0; |
1251 | sb->events_hi = (mddev->events>>32); | |
1252 | sb->events_lo = (u32)mddev->events; | |
1253 | ||
f6705578 N |
1254 | if (mddev->reshape_position == MaxSector) |
1255 | sb->minor_version = 90; | |
1256 | else { | |
1257 | sb->minor_version = 91; | |
1258 | sb->reshape_position = mddev->reshape_position; | |
1259 | sb->new_level = mddev->new_level; | |
1260 | sb->delta_disks = mddev->delta_disks; | |
1261 | sb->new_layout = mddev->new_layout; | |
664e7c41 | 1262 | sb->new_chunk = mddev->new_chunk_sectors << 9; |
f6705578 N |
1263 | } |
1264 | mddev->minor_version = sb->minor_version; | |
1da177e4 LT |
1265 | if (mddev->in_sync) |
1266 | { | |
1267 | sb->recovery_cp = mddev->recovery_cp; | |
1268 | sb->cp_events_hi = (mddev->events>>32); | |
1269 | sb->cp_events_lo = (u32)mddev->events; | |
1270 | if (mddev->recovery_cp == MaxSector) | |
1271 | sb->state = (1<< MD_SB_CLEAN); | |
1272 | } else | |
1273 | sb->recovery_cp = 0; | |
1274 | ||
1275 | sb->layout = mddev->layout; | |
9d8f0363 | 1276 | sb->chunk_size = mddev->chunk_sectors << 9; |
1da177e4 | 1277 | |
c3d9714e | 1278 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) |
a654b9d8 N |
1279 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); |
1280 | ||
1da177e4 | 1281 | sb->disks[0].state = (1<<MD_DISK_REMOVED); |
dafb20fa | 1282 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1283 | mdp_disk_t *d; |
86e6ffdd | 1284 | int desc_nr; |
0261cd9f N |
1285 | int is_active = test_bit(In_sync, &rdev2->flags); |
1286 | ||
1287 | if (rdev2->raid_disk >= 0 && | |
1288 | sb->minor_version >= 91) | |
1289 | /* we have nowhere to store the recovery_offset, | |
1290 | * but if it is not below the reshape_position, | |
1291 | * we can piggy-back on that. | |
1292 | */ | |
1293 | is_active = 1; | |
1294 | if (rdev2->raid_disk < 0 || | |
1295 | test_bit(Faulty, &rdev2->flags)) | |
1296 | is_active = 0; | |
1297 | if (is_active) | |
86e6ffdd | 1298 | desc_nr = rdev2->raid_disk; |
1da177e4 | 1299 | else |
86e6ffdd | 1300 | desc_nr = next_spare++; |
19133a42 | 1301 | rdev2->desc_nr = desc_nr; |
1da177e4 LT |
1302 | d = &sb->disks[rdev2->desc_nr]; |
1303 | nr_disks++; | |
1304 | d->number = rdev2->desc_nr; | |
1305 | d->major = MAJOR(rdev2->bdev->bd_dev); | |
1306 | d->minor = MINOR(rdev2->bdev->bd_dev); | |
0261cd9f | 1307 | if (is_active) |
1da177e4 LT |
1308 | d->raid_disk = rdev2->raid_disk; |
1309 | else | |
1310 | d->raid_disk = rdev2->desc_nr; /* compatibility */ | |
1be7892f | 1311 | if (test_bit(Faulty, &rdev2->flags)) |
1da177e4 | 1312 | d->state = (1<<MD_DISK_FAULTY); |
0261cd9f | 1313 | else if (is_active) { |
1da177e4 | 1314 | d->state = (1<<MD_DISK_ACTIVE); |
0261cd9f N |
1315 | if (test_bit(In_sync, &rdev2->flags)) |
1316 | d->state |= (1<<MD_DISK_SYNC); | |
1da177e4 LT |
1317 | active++; |
1318 | working++; | |
1319 | } else { | |
1320 | d->state = 0; | |
1321 | spare++; | |
1322 | working++; | |
1323 | } | |
8ddf9efe N |
1324 | if (test_bit(WriteMostly, &rdev2->flags)) |
1325 | d->state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
1326 | if (test_bit(FailFast, &rdev2->flags)) |
1327 | d->state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 | 1328 | } |
1da177e4 LT |
1329 | /* now set the "removed" and "faulty" bits on any missing devices */ |
1330 | for (i=0 ; i < mddev->raid_disks ; i++) { | |
1331 | mdp_disk_t *d = &sb->disks[i]; | |
1332 | if (d->state == 0 && d->number == 0) { | |
1333 | d->number = i; | |
1334 | d->raid_disk = i; | |
1335 | d->state = (1<<MD_DISK_REMOVED); | |
1336 | d->state |= (1<<MD_DISK_FAULTY); | |
1337 | failed++; | |
1338 | } | |
1339 | } | |
1340 | sb->nr_disks = nr_disks; | |
1341 | sb->active_disks = active; | |
1342 | sb->working_disks = working; | |
1343 | sb->failed_disks = failed; | |
1344 | sb->spare_disks = spare; | |
1345 | ||
1346 | sb->this_disk = sb->disks[rdev->desc_nr]; | |
1347 | sb->sb_csum = calc_sb_csum(sb); | |
1348 | } | |
1349 | ||
0cd17fec CW |
1350 | /* |
1351 | * rdev_size_change for 0.90.0 | |
1352 | */ | |
1353 | static unsigned long long | |
3cb03002 | 1354 | super_90_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec | 1355 | { |
58c0fed4 | 1356 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1357 | return 0; /* component must fit device */ |
c3d9714e | 1358 | if (rdev->mddev->bitmap_info.offset) |
0cd17fec | 1359 | return 0; /* can't move bitmap */ |
57b2caa3 | 1360 | rdev->sb_start = calc_dev_sboffset(rdev); |
15f4a5fd AN |
1361 | if (!num_sectors || num_sectors > rdev->sb_start) |
1362 | num_sectors = rdev->sb_start; | |
27a7b260 N |
1363 | /* Limit to 4TB as metadata cannot record more than that. |
1364 | * 4TB == 2^32 KB, or 2*2^32 sectors. | |
1365 | */ | |
3312c951 AB |
1366 | if (IS_ENABLED(CONFIG_LBDAF) && (u64)num_sectors >= (2ULL << 32) && |
1367 | rdev->mddev->level >= 1) | |
1368 | num_sectors = (sector_t)(2ULL << 32) - 2; | |
46533ff7 N |
1369 | do { |
1370 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
0cd17fec | 1371 | rdev->sb_page); |
46533ff7 | 1372 | } while (md_super_wait(rdev->mddev) < 0); |
c26a44ed | 1373 | return num_sectors; |
0cd17fec CW |
1374 | } |
1375 | ||
c6563a8c N |
1376 | static int |
1377 | super_90_allow_new_offset(struct md_rdev *rdev, unsigned long long new_offset) | |
1378 | { | |
1379 | /* non-zero offset changes not possible with v0.90 */ | |
1380 | return new_offset == 0; | |
1381 | } | |
0cd17fec | 1382 | |
1da177e4 LT |
1383 | /* |
1384 | * version 1 superblock | |
1385 | */ | |
1386 | ||
f72ffdd6 | 1387 | static __le32 calc_sb_1_csum(struct mdp_superblock_1 *sb) |
1da177e4 | 1388 | { |
1c05b4bc N |
1389 | __le32 disk_csum; |
1390 | u32 csum; | |
1da177e4 LT |
1391 | unsigned long long newcsum; |
1392 | int size = 256 + le32_to_cpu(sb->max_dev)*2; | |
1c05b4bc | 1393 | __le32 *isuper = (__le32*)sb; |
1da177e4 LT |
1394 | |
1395 | disk_csum = sb->sb_csum; | |
1396 | sb->sb_csum = 0; | |
1397 | newcsum = 0; | |
1f3c9907 | 1398 | for (; size >= 4; size -= 4) |
1da177e4 LT |
1399 | newcsum += le32_to_cpu(*isuper++); |
1400 | ||
1401 | if (size == 2) | |
1c05b4bc | 1402 | newcsum += le16_to_cpu(*(__le16*) isuper); |
1da177e4 LT |
1403 | |
1404 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
1405 | sb->sb_csum = disk_csum; | |
1406 | return cpu_to_le32(csum); | |
1407 | } | |
1408 | ||
3cb03002 | 1409 | static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1410 | { |
1411 | struct mdp_superblock_1 *sb; | |
1412 | int ret; | |
0f420358 | 1413 | sector_t sb_start; |
c6563a8c | 1414 | sector_t sectors; |
1da177e4 | 1415 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; |
0002b271 | 1416 | int bmask; |
1da177e4 LT |
1417 | |
1418 | /* | |
0f420358 | 1419 | * Calculate the position of the superblock in 512byte sectors. |
1da177e4 LT |
1420 | * It is always aligned to a 4K boundary and |
1421 | * depeding on minor_version, it can be: | |
1422 | * 0: At least 8K, but less than 12K, from end of device | |
1423 | * 1: At start of device | |
1424 | * 2: 4K from start of device. | |
1425 | */ | |
1426 | switch(minor_version) { | |
1427 | case 0: | |
77304d2a | 1428 | sb_start = i_size_read(rdev->bdev->bd_inode) >> 9; |
0f420358 AN |
1429 | sb_start -= 8*2; |
1430 | sb_start &= ~(sector_t)(4*2-1); | |
1da177e4 LT |
1431 | break; |
1432 | case 1: | |
0f420358 | 1433 | sb_start = 0; |
1da177e4 LT |
1434 | break; |
1435 | case 2: | |
0f420358 | 1436 | sb_start = 8; |
1da177e4 LT |
1437 | break; |
1438 | default: | |
1439 | return -EINVAL; | |
1440 | } | |
0f420358 | 1441 | rdev->sb_start = sb_start; |
1da177e4 | 1442 | |
0002b271 N |
1443 | /* superblock is rarely larger than 1K, but it can be larger, |
1444 | * and it is safe to read 4k, so we do that | |
1445 | */ | |
1446 | ret = read_disk_sb(rdev, 4096); | |
1da177e4 LT |
1447 | if (ret) return ret; |
1448 | ||
65a06f06 | 1449 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1450 | |
1451 | if (sb->magic != cpu_to_le32(MD_SB_MAGIC) || | |
1452 | sb->major_version != cpu_to_le32(1) || | |
1453 | le32_to_cpu(sb->max_dev) > (4096-256)/2 || | |
0f420358 | 1454 | le64_to_cpu(sb->super_offset) != rdev->sb_start || |
71c0805c | 1455 | (le32_to_cpu(sb->feature_map) & ~MD_FEATURE_ALL) != 0) |
1da177e4 LT |
1456 | return -EINVAL; |
1457 | ||
1458 | if (calc_sb_1_csum(sb) != sb->sb_csum) { | |
9d48739e | 1459 | pr_warn("md: invalid superblock checksum on %s\n", |
1da177e4 LT |
1460 | bdevname(rdev->bdev,b)); |
1461 | return -EINVAL; | |
1462 | } | |
1463 | if (le64_to_cpu(sb->data_size) < 10) { | |
9d48739e N |
1464 | pr_warn("md: data_size too small on %s\n", |
1465 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
1466 | return -EINVAL; |
1467 | } | |
c6563a8c N |
1468 | if (sb->pad0 || |
1469 | sb->pad3[0] || | |
1470 | memcmp(sb->pad3, sb->pad3+1, sizeof(sb->pad3) - sizeof(sb->pad3[1]))) | |
1471 | /* Some padding is non-zero, might be a new feature */ | |
1472 | return -EINVAL; | |
e11e93fa | 1473 | |
1da177e4 LT |
1474 | rdev->preferred_minor = 0xffff; |
1475 | rdev->data_offset = le64_to_cpu(sb->data_offset); | |
c6563a8c N |
1476 | rdev->new_data_offset = rdev->data_offset; |
1477 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE) && | |
1478 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) | |
1479 | rdev->new_data_offset += (s32)le32_to_cpu(sb->new_offset); | |
4dbcdc75 | 1480 | atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read)); |
1da177e4 | 1481 | |
0002b271 | 1482 | rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256; |
e1defc4f | 1483 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; |
0002b271 | 1484 | if (rdev->sb_size & bmask) |
a1801f85 N |
1485 | rdev->sb_size = (rdev->sb_size | bmask) + 1; |
1486 | ||
1487 | if (minor_version | |
0f420358 | 1488 | && rdev->data_offset < sb_start + (rdev->sb_size/512)) |
a1801f85 | 1489 | return -EINVAL; |
c6563a8c N |
1490 | if (minor_version |
1491 | && rdev->new_data_offset < sb_start + (rdev->sb_size/512)) | |
1492 | return -EINVAL; | |
0002b271 | 1493 | |
31b65a0d N |
1494 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH)) |
1495 | rdev->desc_nr = -1; | |
1496 | else | |
1497 | rdev->desc_nr = le32_to_cpu(sb->dev_number); | |
1498 | ||
2699b672 N |
1499 | if (!rdev->bb_page) { |
1500 | rdev->bb_page = alloc_page(GFP_KERNEL); | |
1501 | if (!rdev->bb_page) | |
1502 | return -ENOMEM; | |
1503 | } | |
1504 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BAD_BLOCKS) && | |
1505 | rdev->badblocks.count == 0) { | |
1506 | /* need to load the bad block list. | |
1507 | * Currently we limit it to one page. | |
1508 | */ | |
1509 | s32 offset; | |
1510 | sector_t bb_sector; | |
1511 | u64 *bbp; | |
1512 | int i; | |
1513 | int sectors = le16_to_cpu(sb->bblog_size); | |
1514 | if (sectors > (PAGE_SIZE / 512)) | |
1515 | return -EINVAL; | |
1516 | offset = le32_to_cpu(sb->bblog_offset); | |
1517 | if (offset == 0) | |
1518 | return -EINVAL; | |
1519 | bb_sector = (long long)offset; | |
1520 | if (!sync_page_io(rdev, bb_sector, sectors << 9, | |
796a5cf0 | 1521 | rdev->bb_page, REQ_OP_READ, 0, true)) |
2699b672 N |
1522 | return -EIO; |
1523 | bbp = (u64 *)page_address(rdev->bb_page); | |
1524 | rdev->badblocks.shift = sb->bblog_shift; | |
1525 | for (i = 0 ; i < (sectors << (9-3)) ; i++, bbp++) { | |
1526 | u64 bb = le64_to_cpu(*bbp); | |
1527 | int count = bb & (0x3ff); | |
1528 | u64 sector = bb >> 10; | |
1529 | sector <<= sb->bblog_shift; | |
1530 | count <<= sb->bblog_shift; | |
1531 | if (bb + 1 == 0) | |
1532 | break; | |
fc974ee2 | 1533 | if (badblocks_set(&rdev->badblocks, sector, count, 1)) |
2699b672 N |
1534 | return -EINVAL; |
1535 | } | |
486adf72 N |
1536 | } else if (sb->bblog_offset != 0) |
1537 | rdev->badblocks.shift = 0; | |
2699b672 | 1538 | |
ea0213e0 AP |
1539 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_PPL) { |
1540 | rdev->ppl.offset = (__s16)le16_to_cpu(sb->ppl.offset); | |
1541 | rdev->ppl.size = le16_to_cpu(sb->ppl.size); | |
1542 | rdev->ppl.sector = rdev->sb_start + rdev->ppl.offset; | |
1543 | } | |
1544 | ||
9a7b2b0f | 1545 | if (!refdev) { |
8ed75463 | 1546 | ret = 1; |
9a7b2b0f | 1547 | } else { |
1da177e4 | 1548 | __u64 ev1, ev2; |
65a06f06 | 1549 | struct mdp_superblock_1 *refsb = page_address(refdev->sb_page); |
1da177e4 LT |
1550 | |
1551 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16) != 0 || | |
1552 | sb->level != refsb->level || | |
1553 | sb->layout != refsb->layout || | |
1554 | sb->chunksize != refsb->chunksize) { | |
9d48739e | 1555 | pr_warn("md: %s has strangely different superblock to %s\n", |
1da177e4 LT |
1556 | bdevname(rdev->bdev,b), |
1557 | bdevname(refdev->bdev,b2)); | |
1558 | return -EINVAL; | |
1559 | } | |
1560 | ev1 = le64_to_cpu(sb->events); | |
1561 | ev2 = le64_to_cpu(refsb->events); | |
1562 | ||
1563 | if (ev1 > ev2) | |
8ed75463 N |
1564 | ret = 1; |
1565 | else | |
1566 | ret = 0; | |
1da177e4 | 1567 | } |
c6563a8c N |
1568 | if (minor_version) { |
1569 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9); | |
1570 | sectors -= rdev->data_offset; | |
1571 | } else | |
1572 | sectors = rdev->sb_start; | |
1573 | if (sectors < le64_to_cpu(sb->data_size)) | |
1da177e4 | 1574 | return -EINVAL; |
dd8ac336 | 1575 | rdev->sectors = le64_to_cpu(sb->data_size); |
8ed75463 | 1576 | return ret; |
1da177e4 LT |
1577 | } |
1578 | ||
fd01b88c | 1579 | static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 1580 | { |
65a06f06 | 1581 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
07d84d10 | 1582 | __u64 ev1 = le64_to_cpu(sb->events); |
1da177e4 | 1583 | |
41158c7e | 1584 | rdev->raid_disk = -1; |
c5d79adb N |
1585 | clear_bit(Faulty, &rdev->flags); |
1586 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1587 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1588 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1589 | |
1da177e4 LT |
1590 | if (mddev->raid_disks == 0) { |
1591 | mddev->major_version = 1; | |
1592 | mddev->patch_version = 0; | |
e691063a | 1593 | mddev->external = 0; |
9d8f0363 | 1594 | mddev->chunk_sectors = le32_to_cpu(sb->chunksize); |
9ebc6ef1 DD |
1595 | mddev->ctime = le64_to_cpu(sb->ctime); |
1596 | mddev->utime = le64_to_cpu(sb->utime); | |
1da177e4 | 1597 | mddev->level = le32_to_cpu(sb->level); |
d9d166c2 | 1598 | mddev->clevel[0] = 0; |
1da177e4 LT |
1599 | mddev->layout = le32_to_cpu(sb->layout); |
1600 | mddev->raid_disks = le32_to_cpu(sb->raid_disks); | |
58c0fed4 | 1601 | mddev->dev_sectors = le64_to_cpu(sb->size); |
07d84d10 | 1602 | mddev->events = ev1; |
c3d9714e | 1603 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1604 | mddev->bitmap_info.space = 0; |
1605 | /* Default location for bitmap is 1K after superblock | |
1606 | * using 3K - total of 4K | |
1607 | */ | |
c3d9714e | 1608 | mddev->bitmap_info.default_offset = 1024 >> 9; |
6409bb05 | 1609 | mddev->bitmap_info.default_space = (4096-1024) >> 9; |
2c810cdd N |
1610 | mddev->reshape_backwards = 0; |
1611 | ||
1da177e4 LT |
1612 | mddev->recovery_cp = le64_to_cpu(sb->resync_offset); |
1613 | memcpy(mddev->uuid, sb->set_uuid, 16); | |
1614 | ||
1615 | mddev->max_disks = (4096-256)/2; | |
a654b9d8 | 1616 | |
71c0805c | 1617 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) && |
6409bb05 | 1618 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1619 | mddev->bitmap_info.offset = |
1620 | (__s32)le32_to_cpu(sb->bitmap_offset); | |
6409bb05 N |
1621 | /* Metadata doesn't record how much space is available. |
1622 | * For 1.0, we assume we can use up to the superblock | |
1623 | * if before, else to 4K beyond superblock. | |
1624 | * For others, assume no change is possible. | |
1625 | */ | |
1626 | if (mddev->minor_version > 0) | |
1627 | mddev->bitmap_info.space = 0; | |
1628 | else if (mddev->bitmap_info.offset > 0) | |
1629 | mddev->bitmap_info.space = | |
1630 | 8 - mddev->bitmap_info.offset; | |
1631 | else | |
1632 | mddev->bitmap_info.space = | |
1633 | -mddev->bitmap_info.offset; | |
1634 | } | |
e11e93fa | 1635 | |
f6705578 N |
1636 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { |
1637 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); | |
1638 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); | |
1639 | mddev->new_level = le32_to_cpu(sb->new_level); | |
1640 | mddev->new_layout = le32_to_cpu(sb->new_layout); | |
664e7c41 | 1641 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_chunk); |
2c810cdd N |
1642 | if (mddev->delta_disks < 0 || |
1643 | (mddev->delta_disks == 0 && | |
1644 | (le32_to_cpu(sb->feature_map) | |
1645 | & MD_FEATURE_RESHAPE_BACKWARDS))) | |
1646 | mddev->reshape_backwards = 1; | |
f6705578 N |
1647 | } else { |
1648 | mddev->reshape_position = MaxSector; | |
1649 | mddev->delta_disks = 0; | |
1650 | mddev->new_level = mddev->level; | |
1651 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1652 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1653 | } |
1654 | ||
486b0f7b | 1655 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL) |
a62ab49e | 1656 | set_bit(MD_HAS_JOURNAL, &mddev->flags); |
ea0213e0 AP |
1657 | |
1658 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_PPL) { | |
1659 | if (le32_to_cpu(sb->feature_map) & | |
1660 | (MD_FEATURE_BITMAP_OFFSET | MD_FEATURE_JOURNAL)) | |
1661 | return -EINVAL; | |
1662 | set_bit(MD_HAS_PPL, &mddev->flags); | |
1663 | } | |
41158c7e | 1664 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1665 | /* Insist of good event counter while assembling, except for |
1666 | * spares (which don't need an event count) */ | |
1da177e4 | 1667 | ++ev1; |
be6800a7 N |
1668 | if (rdev->desc_nr >= 0 && |
1669 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
a3dfbdaa SL |
1670 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || |
1671 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL)) | |
be6800a7 N |
1672 | if (ev1 < mddev->events) |
1673 | return -EINVAL; | |
41158c7e N |
1674 | } else if (mddev->bitmap) { |
1675 | /* If adding to array with a bitmap, then we can accept an | |
1676 | * older device, but not too old. | |
1677 | */ | |
41158c7e N |
1678 | if (ev1 < mddev->bitmap->events_cleared) |
1679 | return 0; | |
8313b8e5 N |
1680 | if (ev1 < mddev->events) |
1681 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1682 | } else { |
1683 | if (ev1 < mddev->events) | |
1684 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1685 | return 0; | |
1686 | } | |
1da177e4 LT |
1687 | if (mddev->level != LEVEL_MULTIPATH) { |
1688 | int role; | |
3673f305 N |
1689 | if (rdev->desc_nr < 0 || |
1690 | rdev->desc_nr >= le32_to_cpu(sb->max_dev)) { | |
c4d4c91b | 1691 | role = MD_DISK_ROLE_SPARE; |
3673f305 N |
1692 | rdev->desc_nr = -1; |
1693 | } else | |
1694 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
1da177e4 | 1695 | switch(role) { |
c4d4c91b | 1696 | case MD_DISK_ROLE_SPARE: /* spare */ |
1da177e4 | 1697 | break; |
c4d4c91b | 1698 | case MD_DISK_ROLE_FAULTY: /* faulty */ |
b2d444d7 | 1699 | set_bit(Faulty, &rdev->flags); |
1da177e4 | 1700 | break; |
bac624f3 SL |
1701 | case MD_DISK_ROLE_JOURNAL: /* journal device */ |
1702 | if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL)) { | |
1703 | /* journal device without journal feature */ | |
9d48739e | 1704 | pr_warn("md: journal device provided without journal feature, ignoring the device\n"); |
bac624f3 SL |
1705 | return -EINVAL; |
1706 | } | |
1707 | set_bit(Journal, &rdev->flags); | |
3069aa8d | 1708 | rdev->journal_tail = le64_to_cpu(sb->journal_tail); |
9b15603d | 1709 | rdev->raid_disk = 0; |
bac624f3 | 1710 | break; |
1da177e4 | 1711 | default: |
f466722c | 1712 | rdev->saved_raid_disk = role; |
5fd6c1dc | 1713 | if ((le32_to_cpu(sb->feature_map) & |
f466722c | 1714 | MD_FEATURE_RECOVERY_OFFSET)) { |
5fd6c1dc | 1715 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); |
f466722c N |
1716 | if (!(le32_to_cpu(sb->feature_map) & |
1717 | MD_FEATURE_RECOVERY_BITMAP)) | |
1718 | rdev->saved_raid_disk = -1; | |
1719 | } else | |
5fd6c1dc | 1720 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1721 | rdev->raid_disk = role; |
1722 | break; | |
1723 | } | |
8ddf9efe N |
1724 | if (sb->devflags & WriteMostly1) |
1725 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1726 | if (sb->devflags & FailFast1) |
1727 | set_bit(FailFast, &rdev->flags); | |
2d78f8c4 N |
1728 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) |
1729 | set_bit(Replacement, &rdev->flags); | |
41158c7e | 1730 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1731 | set_bit(In_sync, &rdev->flags); |
41158c7e | 1732 | |
1da177e4 LT |
1733 | return 0; |
1734 | } | |
1735 | ||
fd01b88c | 1736 | static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1737 | { |
1738 | struct mdp_superblock_1 *sb; | |
3cb03002 | 1739 | struct md_rdev *rdev2; |
1da177e4 LT |
1740 | int max_dev, i; |
1741 | /* make rdev->sb match mddev and rdev data. */ | |
1742 | ||
65a06f06 | 1743 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1744 | |
1745 | sb->feature_map = 0; | |
1746 | sb->pad0 = 0; | |
5fd6c1dc | 1747 | sb->recovery_offset = cpu_to_le64(0); |
1da177e4 LT |
1748 | memset(sb->pad3, 0, sizeof(sb->pad3)); |
1749 | ||
1750 | sb->utime = cpu_to_le64((__u64)mddev->utime); | |
1751 | sb->events = cpu_to_le64(mddev->events); | |
1752 | if (mddev->in_sync) | |
1753 | sb->resync_offset = cpu_to_le64(mddev->recovery_cp); | |
bd18f646 SL |
1754 | else if (test_bit(MD_JOURNAL_CLEAN, &mddev->flags)) |
1755 | sb->resync_offset = cpu_to_le64(MaxSector); | |
1da177e4 LT |
1756 | else |
1757 | sb->resync_offset = cpu_to_le64(0); | |
1758 | ||
1c05b4bc | 1759 | sb->cnt_corrected_read = cpu_to_le32(atomic_read(&rdev->corrected_errors)); |
4dbcdc75 | 1760 | |
f0ca340c | 1761 | sb->raid_disks = cpu_to_le32(mddev->raid_disks); |
58c0fed4 | 1762 | sb->size = cpu_to_le64(mddev->dev_sectors); |
9d8f0363 | 1763 | sb->chunksize = cpu_to_le32(mddev->chunk_sectors); |
62e1e389 N |
1764 | sb->level = cpu_to_le32(mddev->level); |
1765 | sb->layout = cpu_to_le32(mddev->layout); | |
688834e6 N |
1766 | if (test_bit(FailFast, &rdev->flags)) |
1767 | sb->devflags |= FailFast1; | |
1768 | else | |
1769 | sb->devflags &= ~FailFast1; | |
f0ca340c | 1770 | |
aeb9b211 N |
1771 | if (test_bit(WriteMostly, &rdev->flags)) |
1772 | sb->devflags |= WriteMostly1; | |
1773 | else | |
1774 | sb->devflags &= ~WriteMostly1; | |
c6563a8c N |
1775 | sb->data_offset = cpu_to_le64(rdev->data_offset); |
1776 | sb->data_size = cpu_to_le64(rdev->sectors); | |
aeb9b211 | 1777 | |
c3d9714e N |
1778 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) { |
1779 | sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset); | |
71c0805c | 1780 | sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); |
a654b9d8 | 1781 | } |
5fd6c1dc | 1782 | |
f2076e7d | 1783 | if (rdev->raid_disk >= 0 && !test_bit(Journal, &rdev->flags) && |
97e4f42d | 1784 | !test_bit(In_sync, &rdev->flags)) { |
93be75ff N |
1785 | sb->feature_map |= |
1786 | cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET); | |
1787 | sb->recovery_offset = | |
1788 | cpu_to_le64(rdev->recovery_offset); | |
f466722c N |
1789 | if (rdev->saved_raid_disk >= 0 && mddev->bitmap) |
1790 | sb->feature_map |= | |
1791 | cpu_to_le32(MD_FEATURE_RECOVERY_BITMAP); | |
5fd6c1dc | 1792 | } |
3069aa8d SL |
1793 | /* Note: recovery_offset and journal_tail share space */ |
1794 | if (test_bit(Journal, &rdev->flags)) | |
1795 | sb->journal_tail = cpu_to_le64(rdev->journal_tail); | |
2d78f8c4 N |
1796 | if (test_bit(Replacement, &rdev->flags)) |
1797 | sb->feature_map |= | |
1798 | cpu_to_le32(MD_FEATURE_REPLACEMENT); | |
5fd6c1dc | 1799 | |
f6705578 N |
1800 | if (mddev->reshape_position != MaxSector) { |
1801 | sb->feature_map |= cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); | |
1802 | sb->reshape_position = cpu_to_le64(mddev->reshape_position); | |
1803 | sb->new_layout = cpu_to_le32(mddev->new_layout); | |
1804 | sb->delta_disks = cpu_to_le32(mddev->delta_disks); | |
1805 | sb->new_level = cpu_to_le32(mddev->new_level); | |
664e7c41 | 1806 | sb->new_chunk = cpu_to_le32(mddev->new_chunk_sectors); |
2c810cdd N |
1807 | if (mddev->delta_disks == 0 && |
1808 | mddev->reshape_backwards) | |
1809 | sb->feature_map | |
1810 | |= cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS); | |
c6563a8c N |
1811 | if (rdev->new_data_offset != rdev->data_offset) { |
1812 | sb->feature_map | |
1813 | |= cpu_to_le32(MD_FEATURE_NEW_OFFSET); | |
1814 | sb->new_offset = cpu_to_le32((__u32)(rdev->new_data_offset | |
1815 | - rdev->data_offset)); | |
1816 | } | |
f6705578 | 1817 | } |
a654b9d8 | 1818 | |
3c462c88 GR |
1819 | if (mddev_is_clustered(mddev)) |
1820 | sb->feature_map |= cpu_to_le32(MD_FEATURE_CLUSTERED); | |
1821 | ||
2699b672 N |
1822 | if (rdev->badblocks.count == 0) |
1823 | /* Nothing to do for bad blocks*/ ; | |
1824 | else if (sb->bblog_offset == 0) | |
1825 | /* Cannot record bad blocks on this device */ | |
1826 | md_error(mddev, rdev); | |
1827 | else { | |
1828 | struct badblocks *bb = &rdev->badblocks; | |
1829 | u64 *bbp = (u64 *)page_address(rdev->bb_page); | |
1830 | u64 *p = bb->page; | |
1831 | sb->feature_map |= cpu_to_le32(MD_FEATURE_BAD_BLOCKS); | |
1832 | if (bb->changed) { | |
1833 | unsigned seq; | |
1834 | ||
1835 | retry: | |
1836 | seq = read_seqbegin(&bb->lock); | |
1837 | ||
1838 | memset(bbp, 0xff, PAGE_SIZE); | |
1839 | ||
1840 | for (i = 0 ; i < bb->count ; i++) { | |
35f9ac2d | 1841 | u64 internal_bb = p[i]; |
2699b672 N |
1842 | u64 store_bb = ((BB_OFFSET(internal_bb) << 10) |
1843 | | BB_LEN(internal_bb)); | |
35f9ac2d | 1844 | bbp[i] = cpu_to_le64(store_bb); |
2699b672 | 1845 | } |
d0962936 | 1846 | bb->changed = 0; |
2699b672 N |
1847 | if (read_seqretry(&bb->lock, seq)) |
1848 | goto retry; | |
1849 | ||
1850 | bb->sector = (rdev->sb_start + | |
1851 | (int)le32_to_cpu(sb->bblog_offset)); | |
1852 | bb->size = le16_to_cpu(sb->bblog_size); | |
2699b672 N |
1853 | } |
1854 | } | |
1855 | ||
1da177e4 | 1856 | max_dev = 0; |
dafb20fa | 1857 | rdev_for_each(rdev2, mddev) |
1da177e4 LT |
1858 | if (rdev2->desc_nr+1 > max_dev) |
1859 | max_dev = rdev2->desc_nr+1; | |
a778b73f | 1860 | |
70471daf N |
1861 | if (max_dev > le32_to_cpu(sb->max_dev)) { |
1862 | int bmask; | |
a778b73f | 1863 | sb->max_dev = cpu_to_le32(max_dev); |
70471daf N |
1864 | rdev->sb_size = max_dev * 2 + 256; |
1865 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; | |
1866 | if (rdev->sb_size & bmask) | |
1867 | rdev->sb_size = (rdev->sb_size | bmask) + 1; | |
ddcf3522 N |
1868 | } else |
1869 | max_dev = le32_to_cpu(sb->max_dev); | |
1870 | ||
1da177e4 | 1871 | for (i=0; i<max_dev;i++) |
8df72024 | 1872 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
f72ffdd6 | 1873 | |
a97b7896 SL |
1874 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) |
1875 | sb->feature_map |= cpu_to_le32(MD_FEATURE_JOURNAL); | |
f72ffdd6 | 1876 | |
ea0213e0 AP |
1877 | if (test_bit(MD_HAS_PPL, &mddev->flags)) { |
1878 | sb->feature_map |= cpu_to_le32(MD_FEATURE_PPL); | |
1879 | sb->ppl.offset = cpu_to_le16(rdev->ppl.offset); | |
1880 | sb->ppl.size = cpu_to_le16(rdev->ppl.size); | |
1881 | } | |
1882 | ||
dafb20fa | 1883 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1884 | i = rdev2->desc_nr; |
b2d444d7 | 1885 | if (test_bit(Faulty, &rdev2->flags)) |
c4d4c91b | 1886 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY); |
b2d444d7 | 1887 | else if (test_bit(In_sync, &rdev2->flags)) |
1da177e4 | 1888 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
a97b7896 | 1889 | else if (test_bit(Journal, &rdev2->flags)) |
bac624f3 | 1890 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_JOURNAL); |
93be75ff | 1891 | else if (rdev2->raid_disk >= 0) |
5fd6c1dc | 1892 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
1da177e4 | 1893 | else |
c4d4c91b | 1894 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
1da177e4 LT |
1895 | } |
1896 | ||
1da177e4 LT |
1897 | sb->sb_csum = calc_sb_1_csum(sb); |
1898 | } | |
1899 | ||
0cd17fec | 1900 | static unsigned long long |
3cb03002 | 1901 | super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec CW |
1902 | { |
1903 | struct mdp_superblock_1 *sb; | |
15f4a5fd | 1904 | sector_t max_sectors; |
58c0fed4 | 1905 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1906 | return 0; /* component must fit device */ |
c6563a8c N |
1907 | if (rdev->data_offset != rdev->new_data_offset) |
1908 | return 0; /* too confusing */ | |
0f420358 | 1909 | if (rdev->sb_start < rdev->data_offset) { |
0cd17fec | 1910 | /* minor versions 1 and 2; superblock before data */ |
77304d2a | 1911 | max_sectors = i_size_read(rdev->bdev->bd_inode) >> 9; |
15f4a5fd AN |
1912 | max_sectors -= rdev->data_offset; |
1913 | if (!num_sectors || num_sectors > max_sectors) | |
1914 | num_sectors = max_sectors; | |
c3d9714e | 1915 | } else if (rdev->mddev->bitmap_info.offset) { |
0cd17fec CW |
1916 | /* minor version 0 with bitmap we can't move */ |
1917 | return 0; | |
1918 | } else { | |
1919 | /* minor version 0; superblock after data */ | |
0f420358 | 1920 | sector_t sb_start; |
77304d2a | 1921 | sb_start = (i_size_read(rdev->bdev->bd_inode) >> 9) - 8*2; |
0f420358 | 1922 | sb_start &= ~(sector_t)(4*2 - 1); |
dd8ac336 | 1923 | max_sectors = rdev->sectors + sb_start - rdev->sb_start; |
15f4a5fd AN |
1924 | if (!num_sectors || num_sectors > max_sectors) |
1925 | num_sectors = max_sectors; | |
0f420358 | 1926 | rdev->sb_start = sb_start; |
0cd17fec | 1927 | } |
65a06f06 | 1928 | sb = page_address(rdev->sb_page); |
15f4a5fd | 1929 | sb->data_size = cpu_to_le64(num_sectors); |
3fb632e4 | 1930 | sb->super_offset = cpu_to_le64(rdev->sb_start); |
0cd17fec | 1931 | sb->sb_csum = calc_sb_1_csum(sb); |
46533ff7 N |
1932 | do { |
1933 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
1934 | rdev->sb_page); | |
1935 | } while (md_super_wait(rdev->mddev) < 0); | |
c26a44ed | 1936 | return num_sectors; |
c6563a8c N |
1937 | |
1938 | } | |
1939 | ||
1940 | static int | |
1941 | super_1_allow_new_offset(struct md_rdev *rdev, | |
1942 | unsigned long long new_offset) | |
1943 | { | |
1944 | /* All necessary checks on new >= old have been done */ | |
1945 | struct bitmap *bitmap; | |
1946 | if (new_offset >= rdev->data_offset) | |
1947 | return 1; | |
1948 | ||
1949 | /* with 1.0 metadata, there is no metadata to tread on | |
1950 | * so we can always move back */ | |
1951 | if (rdev->mddev->minor_version == 0) | |
1952 | return 1; | |
1953 | ||
1954 | /* otherwise we must be sure not to step on | |
1955 | * any metadata, so stay: | |
1956 | * 36K beyond start of superblock | |
1957 | * beyond end of badblocks | |
1958 | * beyond write-intent bitmap | |
1959 | */ | |
1960 | if (rdev->sb_start + (32+4)*2 > new_offset) | |
1961 | return 0; | |
1962 | bitmap = rdev->mddev->bitmap; | |
1963 | if (bitmap && !rdev->mddev->bitmap_info.file && | |
1964 | rdev->sb_start + rdev->mddev->bitmap_info.offset + | |
1ec885cd | 1965 | bitmap->storage.file_pages * (PAGE_SIZE>>9) > new_offset) |
c6563a8c N |
1966 | return 0; |
1967 | if (rdev->badblocks.sector + rdev->badblocks.size > new_offset) | |
1968 | return 0; | |
1969 | ||
1970 | return 1; | |
0cd17fec | 1971 | } |
1da177e4 | 1972 | |
75c96f85 | 1973 | static struct super_type super_types[] = { |
1da177e4 LT |
1974 | [0] = { |
1975 | .name = "0.90.0", | |
1976 | .owner = THIS_MODULE, | |
0cd17fec CW |
1977 | .load_super = super_90_load, |
1978 | .validate_super = super_90_validate, | |
1979 | .sync_super = super_90_sync, | |
1980 | .rdev_size_change = super_90_rdev_size_change, | |
c6563a8c | 1981 | .allow_new_offset = super_90_allow_new_offset, |
1da177e4 LT |
1982 | }, |
1983 | [1] = { | |
1984 | .name = "md-1", | |
1985 | .owner = THIS_MODULE, | |
0cd17fec CW |
1986 | .load_super = super_1_load, |
1987 | .validate_super = super_1_validate, | |
1988 | .sync_super = super_1_sync, | |
1989 | .rdev_size_change = super_1_rdev_size_change, | |
c6563a8c | 1990 | .allow_new_offset = super_1_allow_new_offset, |
1da177e4 LT |
1991 | }, |
1992 | }; | |
1da177e4 | 1993 | |
fd01b88c | 1994 | static void sync_super(struct mddev *mddev, struct md_rdev *rdev) |
076f968b JB |
1995 | { |
1996 | if (mddev->sync_super) { | |
1997 | mddev->sync_super(mddev, rdev); | |
1998 | return; | |
1999 | } | |
2000 | ||
2001 | BUG_ON(mddev->major_version >= ARRAY_SIZE(super_types)); | |
2002 | ||
2003 | super_types[mddev->major_version].sync_super(mddev, rdev); | |
2004 | } | |
2005 | ||
fd01b88c | 2006 | static int match_mddev_units(struct mddev *mddev1, struct mddev *mddev2) |
1da177e4 | 2007 | { |
3cb03002 | 2008 | struct md_rdev *rdev, *rdev2; |
1da177e4 | 2009 | |
4b80991c | 2010 | rcu_read_lock(); |
0b020e85 SL |
2011 | rdev_for_each_rcu(rdev, mddev1) { |
2012 | if (test_bit(Faulty, &rdev->flags) || | |
2013 | test_bit(Journal, &rdev->flags) || | |
2014 | rdev->raid_disk == -1) | |
2015 | continue; | |
2016 | rdev_for_each_rcu(rdev2, mddev2) { | |
2017 | if (test_bit(Faulty, &rdev2->flags) || | |
2018 | test_bit(Journal, &rdev2->flags) || | |
2019 | rdev2->raid_disk == -1) | |
2020 | continue; | |
7dd5e7c3 | 2021 | if (rdev->bdev->bd_contains == |
4b80991c N |
2022 | rdev2->bdev->bd_contains) { |
2023 | rcu_read_unlock(); | |
7dd5e7c3 | 2024 | return 1; |
4b80991c | 2025 | } |
0b020e85 SL |
2026 | } |
2027 | } | |
4b80991c | 2028 | rcu_read_unlock(); |
1da177e4 LT |
2029 | return 0; |
2030 | } | |
2031 | ||
2032 | static LIST_HEAD(pending_raid_disks); | |
2033 | ||
ac5e7113 AN |
2034 | /* |
2035 | * Try to register data integrity profile for an mddev | |
2036 | * | |
2037 | * This is called when an array is started and after a disk has been kicked | |
2038 | * from the array. It only succeeds if all working and active component devices | |
2039 | * are integrity capable with matching profiles. | |
2040 | */ | |
fd01b88c | 2041 | int md_integrity_register(struct mddev *mddev) |
ac5e7113 | 2042 | { |
3cb03002 | 2043 | struct md_rdev *rdev, *reference = NULL; |
ac5e7113 AN |
2044 | |
2045 | if (list_empty(&mddev->disks)) | |
2046 | return 0; /* nothing to do */ | |
629acb6a JB |
2047 | if (!mddev->gendisk || blk_get_integrity(mddev->gendisk)) |
2048 | return 0; /* shouldn't register, or already is */ | |
dafb20fa | 2049 | rdev_for_each(rdev, mddev) { |
ac5e7113 AN |
2050 | /* skip spares and non-functional disks */ |
2051 | if (test_bit(Faulty, &rdev->flags)) | |
2052 | continue; | |
2053 | if (rdev->raid_disk < 0) | |
2054 | continue; | |
ac5e7113 AN |
2055 | if (!reference) { |
2056 | /* Use the first rdev as the reference */ | |
2057 | reference = rdev; | |
2058 | continue; | |
2059 | } | |
2060 | /* does this rdev's profile match the reference profile? */ | |
2061 | if (blk_integrity_compare(reference->bdev->bd_disk, | |
2062 | rdev->bdev->bd_disk) < 0) | |
2063 | return -EINVAL; | |
2064 | } | |
89078d57 MP |
2065 | if (!reference || !bdev_get_integrity(reference->bdev)) |
2066 | return 0; | |
ac5e7113 AN |
2067 | /* |
2068 | * All component devices are integrity capable and have matching | |
2069 | * profiles, register the common profile for the md device. | |
2070 | */ | |
25520d55 MP |
2071 | blk_integrity_register(mddev->gendisk, |
2072 | bdev_get_integrity(reference->bdev)); | |
2073 | ||
9d48739e | 2074 | pr_debug("md: data integrity enabled on %s\n", mdname(mddev)); |
a91a2785 | 2075 | if (bioset_integrity_create(mddev->bio_set, BIO_POOL_SIZE)) { |
9d48739e | 2076 | pr_err("md: failed to create integrity pool for %s\n", |
a91a2785 MP |
2077 | mdname(mddev)); |
2078 | return -EINVAL; | |
2079 | } | |
ac5e7113 AN |
2080 | return 0; |
2081 | } | |
2082 | EXPORT_SYMBOL(md_integrity_register); | |
2083 | ||
1501efad DW |
2084 | /* |
2085 | * Attempt to add an rdev, but only if it is consistent with the current | |
2086 | * integrity profile | |
2087 | */ | |
2088 | int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev) | |
3f9d99c1 | 2089 | { |
2863b9eb JB |
2090 | struct blk_integrity *bi_rdev; |
2091 | struct blk_integrity *bi_mddev; | |
1501efad | 2092 | char name[BDEVNAME_SIZE]; |
2863b9eb JB |
2093 | |
2094 | if (!mddev->gendisk) | |
1501efad | 2095 | return 0; |
2863b9eb JB |
2096 | |
2097 | bi_rdev = bdev_get_integrity(rdev->bdev); | |
2098 | bi_mddev = blk_get_integrity(mddev->gendisk); | |
3f9d99c1 | 2099 | |
ac5e7113 | 2100 | if (!bi_mddev) /* nothing to do */ |
1501efad DW |
2101 | return 0; |
2102 | ||
2103 | if (blk_integrity_compare(mddev->gendisk, rdev->bdev->bd_disk) != 0) { | |
9d48739e N |
2104 | pr_err("%s: incompatible integrity profile for %s\n", |
2105 | mdname(mddev), bdevname(rdev->bdev, name)); | |
1501efad DW |
2106 | return -ENXIO; |
2107 | } | |
2108 | ||
2109 | return 0; | |
3f9d99c1 | 2110 | } |
ac5e7113 | 2111 | EXPORT_SYMBOL(md_integrity_add_rdev); |
3f9d99c1 | 2112 | |
f72ffdd6 | 2113 | static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) |
1da177e4 | 2114 | { |
7dd5e7c3 | 2115 | char b[BDEVNAME_SIZE]; |
f637b9f9 | 2116 | struct kobject *ko; |
5e55e2f5 | 2117 | int err; |
1da177e4 | 2118 | |
11e2ede0 DW |
2119 | /* prevent duplicates */ |
2120 | if (find_rdev(mddev, rdev->bdev->bd_dev)) | |
2121 | return -EEXIST; | |
2122 | ||
97b20ef7 N |
2123 | if ((bdev_read_only(rdev->bdev) || bdev_read_only(rdev->meta_bdev)) && |
2124 | mddev->pers) | |
2125 | return -EROFS; | |
2126 | ||
dd8ac336 | 2127 | /* make sure rdev->sectors exceeds mddev->dev_sectors */ |
f6b6ec5c SL |
2128 | if (!test_bit(Journal, &rdev->flags) && |
2129 | rdev->sectors && | |
2130 | (mddev->dev_sectors == 0 || rdev->sectors < mddev->dev_sectors)) { | |
a778b73f N |
2131 | if (mddev->pers) { |
2132 | /* Cannot change size, so fail | |
2133 | * If mddev->level <= 0, then we don't care | |
2134 | * about aligning sizes (e.g. linear) | |
2135 | */ | |
2136 | if (mddev->level > 0) | |
2137 | return -ENOSPC; | |
2138 | } else | |
dd8ac336 | 2139 | mddev->dev_sectors = rdev->sectors; |
2bf071bf | 2140 | } |
1da177e4 LT |
2141 | |
2142 | /* Verify rdev->desc_nr is unique. | |
2143 | * If it is -1, assign a free number, else | |
2144 | * check number is not in use | |
2145 | */ | |
4878e9eb | 2146 | rcu_read_lock(); |
1da177e4 LT |
2147 | if (rdev->desc_nr < 0) { |
2148 | int choice = 0; | |
4878e9eb N |
2149 | if (mddev->pers) |
2150 | choice = mddev->raid_disks; | |
57d051dc | 2151 | while (md_find_rdev_nr_rcu(mddev, choice)) |
1da177e4 LT |
2152 | choice++; |
2153 | rdev->desc_nr = choice; | |
2154 | } else { | |
57d051dc | 2155 | if (md_find_rdev_nr_rcu(mddev, rdev->desc_nr)) { |
4878e9eb | 2156 | rcu_read_unlock(); |
1da177e4 | 2157 | return -EBUSY; |
4878e9eb | 2158 | } |
1da177e4 | 2159 | } |
4878e9eb | 2160 | rcu_read_unlock(); |
f6b6ec5c SL |
2161 | if (!test_bit(Journal, &rdev->flags) && |
2162 | mddev->max_disks && rdev->desc_nr >= mddev->max_disks) { | |
9d48739e N |
2163 | pr_warn("md: %s: array is limited to %d devices\n", |
2164 | mdname(mddev), mddev->max_disks); | |
de01dfad N |
2165 | return -EBUSY; |
2166 | } | |
19133a42 | 2167 | bdevname(rdev->bdev,b); |
90a9befb | 2168 | strreplace(b, '/', '!'); |
649316b2 | 2169 | |
1da177e4 | 2170 | rdev->mddev = mddev; |
9d48739e | 2171 | pr_debug("md: bind<%s>\n", b); |
86e6ffdd | 2172 | |
b2d6db58 | 2173 | if ((err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b))) |
5e55e2f5 | 2174 | goto fail; |
86e6ffdd | 2175 | |
0762b8bd | 2176 | ko = &part_to_dev(rdev->bdev->bd_part)->kobj; |
00bcb4ac N |
2177 | if (sysfs_create_link(&rdev->kobj, ko, "block")) |
2178 | /* failure here is OK */; | |
2179 | rdev->sysfs_state = sysfs_get_dirent_safe(rdev->kobj.sd, "state"); | |
3c0ee63a | 2180 | |
4b80991c | 2181 | list_add_rcu(&rdev->same_set, &mddev->disks); |
e09b457b | 2182 | bd_link_disk_holder(rdev->bdev, mddev->gendisk); |
4044ba58 N |
2183 | |
2184 | /* May as well allow recovery to be retried once */ | |
5389042f | 2185 | mddev->recovery_disabled++; |
3f9d99c1 | 2186 | |
1da177e4 | 2187 | return 0; |
5e55e2f5 N |
2188 | |
2189 | fail: | |
9d48739e N |
2190 | pr_warn("md: failed to register dev-%s for %s\n", |
2191 | b, mdname(mddev)); | |
5e55e2f5 | 2192 | return err; |
1da177e4 LT |
2193 | } |
2194 | ||
177a99b2 | 2195 | static void md_delayed_delete(struct work_struct *ws) |
5792a285 | 2196 | { |
3cb03002 | 2197 | struct md_rdev *rdev = container_of(ws, struct md_rdev, del_work); |
5792a285 | 2198 | kobject_del(&rdev->kobj); |
177a99b2 | 2199 | kobject_put(&rdev->kobj); |
5792a285 N |
2200 | } |
2201 | ||
f72ffdd6 | 2202 | static void unbind_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2203 | { |
2204 | char b[BDEVNAME_SIZE]; | |
403df478 | 2205 | |
49731baa | 2206 | bd_unlink_disk_holder(rdev->bdev, rdev->mddev->gendisk); |
4b80991c | 2207 | list_del_rcu(&rdev->same_set); |
9d48739e | 2208 | pr_debug("md: unbind<%s>\n", bdevname(rdev->bdev,b)); |
1da177e4 | 2209 | rdev->mddev = NULL; |
86e6ffdd | 2210 | sysfs_remove_link(&rdev->kobj, "block"); |
3c0ee63a N |
2211 | sysfs_put(rdev->sysfs_state); |
2212 | rdev->sysfs_state = NULL; | |
2230dfe4 | 2213 | rdev->badblocks.count = 0; |
5792a285 | 2214 | /* We need to delay this, otherwise we can deadlock when |
4b80991c N |
2215 | * writing to 'remove' to "dev/state". We also need |
2216 | * to delay it due to rcu usage. | |
5792a285 | 2217 | */ |
4b80991c | 2218 | synchronize_rcu(); |
177a99b2 N |
2219 | INIT_WORK(&rdev->del_work, md_delayed_delete); |
2220 | kobject_get(&rdev->kobj); | |
e804ac78 | 2221 | queue_work(md_misc_wq, &rdev->del_work); |
1da177e4 LT |
2222 | } |
2223 | ||
2224 | /* | |
2225 | * prevent the device from being mounted, repartitioned or | |
2226 | * otherwise reused by a RAID array (or any other kernel | |
2227 | * subsystem), by bd_claiming the device. | |
2228 | */ | |
3cb03002 | 2229 | static int lock_rdev(struct md_rdev *rdev, dev_t dev, int shared) |
1da177e4 LT |
2230 | { |
2231 | int err = 0; | |
2232 | struct block_device *bdev; | |
2233 | char b[BDEVNAME_SIZE]; | |
2234 | ||
d4d77629 | 2235 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, |
3cb03002 | 2236 | shared ? (struct md_rdev *)lock_rdev : rdev); |
1da177e4 | 2237 | if (IS_ERR(bdev)) { |
9d48739e | 2238 | pr_warn("md: could not open %s.\n", __bdevname(dev, b)); |
1da177e4 LT |
2239 | return PTR_ERR(bdev); |
2240 | } | |
1da177e4 LT |
2241 | rdev->bdev = bdev; |
2242 | return err; | |
2243 | } | |
2244 | ||
3cb03002 | 2245 | static void unlock_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2246 | { |
2247 | struct block_device *bdev = rdev->bdev; | |
2248 | rdev->bdev = NULL; | |
e525fd89 | 2249 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
1da177e4 LT |
2250 | } |
2251 | ||
2252 | void md_autodetect_dev(dev_t dev); | |
2253 | ||
f72ffdd6 | 2254 | static void export_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2255 | { |
2256 | char b[BDEVNAME_SIZE]; | |
403df478 | 2257 | |
9d48739e | 2258 | pr_debug("md: export_rdev(%s)\n", bdevname(rdev->bdev,b)); |
545c8795 | 2259 | md_rdev_clear(rdev); |
1da177e4 | 2260 | #ifndef MODULE |
d0fae18f N |
2261 | if (test_bit(AutoDetected, &rdev->flags)) |
2262 | md_autodetect_dev(rdev->bdev->bd_dev); | |
1da177e4 LT |
2263 | #endif |
2264 | unlock_rdev(rdev); | |
86e6ffdd | 2265 | kobject_put(&rdev->kobj); |
1da177e4 LT |
2266 | } |
2267 | ||
fb56dfef | 2268 | void md_kick_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2269 | { |
2270 | unbind_rdev_from_array(rdev); | |
2271 | export_rdev(rdev); | |
2272 | } | |
fb56dfef | 2273 | EXPORT_SYMBOL_GPL(md_kick_rdev_from_array); |
1da177e4 | 2274 | |
fd01b88c | 2275 | static void export_array(struct mddev *mddev) |
1da177e4 | 2276 | { |
0638bb0e | 2277 | struct md_rdev *rdev; |
1da177e4 | 2278 | |
0638bb0e N |
2279 | while (!list_empty(&mddev->disks)) { |
2280 | rdev = list_first_entry(&mddev->disks, struct md_rdev, | |
2281 | same_set); | |
fb56dfef | 2282 | md_kick_rdev_from_array(rdev); |
1da177e4 | 2283 | } |
1da177e4 LT |
2284 | mddev->raid_disks = 0; |
2285 | mddev->major_version = 0; | |
2286 | } | |
2287 | ||
6497709b N |
2288 | static bool set_in_sync(struct mddev *mddev) |
2289 | { | |
2290 | WARN_ON_ONCE(!spin_is_locked(&mddev->lock)); | |
4ad23a97 N |
2291 | if (!mddev->in_sync) { |
2292 | mddev->sync_checkers++; | |
2293 | spin_unlock(&mddev->lock); | |
2294 | percpu_ref_switch_to_atomic_sync(&mddev->writes_pending); | |
2295 | spin_lock(&mddev->lock); | |
2296 | if (!mddev->in_sync && | |
2297 | percpu_ref_is_zero(&mddev->writes_pending)) { | |
6497709b | 2298 | mddev->in_sync = 1; |
4ad23a97 N |
2299 | /* |
2300 | * Ensure ->in_sync is visible before we clear | |
2301 | * ->sync_checkers. | |
2302 | */ | |
55cc39f3 | 2303 | smp_mb(); |
6497709b N |
2304 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2305 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
2306 | } | |
4ad23a97 N |
2307 | if (--mddev->sync_checkers == 0) |
2308 | percpu_ref_switch_to_percpu(&mddev->writes_pending); | |
6497709b N |
2309 | } |
2310 | if (mddev->safemode == 1) | |
2311 | mddev->safemode = 0; | |
2312 | return mddev->in_sync; | |
2313 | } | |
2314 | ||
f72ffdd6 | 2315 | static void sync_sbs(struct mddev *mddev, int nospares) |
1da177e4 | 2316 | { |
42543769 N |
2317 | /* Update each superblock (in-memory image), but |
2318 | * if we are allowed to, skip spares which already | |
2319 | * have the right event counter, or have one earlier | |
2320 | * (which would mean they aren't being marked as dirty | |
2321 | * with the rest of the array) | |
2322 | */ | |
3cb03002 | 2323 | struct md_rdev *rdev; |
dafb20fa | 2324 | rdev_for_each(rdev, mddev) { |
42543769 N |
2325 | if (rdev->sb_events == mddev->events || |
2326 | (nospares && | |
2327 | rdev->raid_disk < 0 && | |
42543769 N |
2328 | rdev->sb_events+1 == mddev->events)) { |
2329 | /* Don't update this superblock */ | |
2330 | rdev->sb_loaded = 2; | |
2331 | } else { | |
076f968b | 2332 | sync_super(mddev, rdev); |
42543769 N |
2333 | rdev->sb_loaded = 1; |
2334 | } | |
1da177e4 LT |
2335 | } |
2336 | } | |
2337 | ||
2aa82191 GR |
2338 | static bool does_sb_need_changing(struct mddev *mddev) |
2339 | { | |
2340 | struct md_rdev *rdev; | |
2341 | struct mdp_superblock_1 *sb; | |
2342 | int role; | |
2343 | ||
2344 | /* Find a good rdev */ | |
2345 | rdev_for_each(rdev, mddev) | |
2346 | if ((rdev->raid_disk >= 0) && !test_bit(Faulty, &rdev->flags)) | |
2347 | break; | |
2348 | ||
2349 | /* No good device found. */ | |
2350 | if (!rdev) | |
2351 | return false; | |
2352 | ||
2353 | sb = page_address(rdev->sb_page); | |
2354 | /* Check if a device has become faulty or a spare become active */ | |
2355 | rdev_for_each(rdev, mddev) { | |
2356 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
2357 | /* Device activated? */ | |
2358 | if (role == 0xffff && rdev->raid_disk >=0 && | |
2359 | !test_bit(Faulty, &rdev->flags)) | |
2360 | return true; | |
2361 | /* Device turned faulty? */ | |
2362 | if (test_bit(Faulty, &rdev->flags) && (role < 0xfffd)) | |
2363 | return true; | |
2364 | } | |
2365 | ||
2366 | /* Check if any mddev parameters have changed */ | |
2367 | if ((mddev->dev_sectors != le64_to_cpu(sb->size)) || | |
2368 | (mddev->reshape_position != le64_to_cpu(sb->reshape_position)) || | |
13459213 | 2369 | (mddev->layout != le32_to_cpu(sb->layout)) || |
2aa82191 GR |
2370 | (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) || |
2371 | (mddev->chunk_sectors != le32_to_cpu(sb->chunksize))) | |
2372 | return true; | |
2373 | ||
2374 | return false; | |
2375 | } | |
2376 | ||
1aee41f6 | 2377 | void md_update_sb(struct mddev *mddev, int force_change) |
1da177e4 | 2378 | { |
3cb03002 | 2379 | struct md_rdev *rdev; |
06d91a5f | 2380 | int sync_req; |
42543769 | 2381 | int nospares = 0; |
2699b672 | 2382 | int any_badblocks_changed = 0; |
23b63f9f | 2383 | int ret = -1; |
1da177e4 | 2384 | |
d87f064f N |
2385 | if (mddev->ro) { |
2386 | if (force_change) | |
2953079c | 2387 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
d87f064f N |
2388 | return; |
2389 | } | |
2aa82191 | 2390 | |
2c97cf13 | 2391 | repeat: |
2aa82191 | 2392 | if (mddev_is_clustered(mddev)) { |
2953079c | 2393 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
2aa82191 | 2394 | force_change = 1; |
2953079c | 2395 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
85ad1d13 | 2396 | nospares = 1; |
23b63f9f | 2397 | ret = md_cluster_ops->metadata_update_start(mddev); |
2aa82191 GR |
2398 | /* Has someone else has updated the sb */ |
2399 | if (!does_sb_need_changing(mddev)) { | |
23b63f9f GJ |
2400 | if (ret == 0) |
2401 | md_cluster_ops->metadata_update_cancel(mddev); | |
2953079c SL |
2402 | bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2403 | BIT(MD_SB_CHANGE_DEVS) | | |
2404 | BIT(MD_SB_CHANGE_CLEAN)); | |
2aa82191 GR |
2405 | return; |
2406 | } | |
2407 | } | |
2c97cf13 | 2408 | |
3a3a5ddb | 2409 | /* First make sure individual recovery_offsets are correct */ |
dafb20fa | 2410 | rdev_for_each(rdev, mddev) { |
3a3a5ddb N |
2411 | if (rdev->raid_disk >= 0 && |
2412 | mddev->delta_disks >= 0 && | |
f2076e7d | 2413 | !test_bit(Journal, &rdev->flags) && |
3a3a5ddb N |
2414 | !test_bit(In_sync, &rdev->flags) && |
2415 | mddev->curr_resync_completed > rdev->recovery_offset) | |
2416 | rdev->recovery_offset = mddev->curr_resync_completed; | |
2417 | ||
f72ffdd6 | 2418 | } |
bd52b746 | 2419 | if (!mddev->persistent) { |
2953079c SL |
2420 | clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2421 | clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
de393cde | 2422 | if (!mddev->external) { |
2953079c | 2423 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
dafb20fa | 2424 | rdev_for_each(rdev, mddev) { |
de393cde | 2425 | if (rdev->badblocks.changed) { |
d0962936 | 2426 | rdev->badblocks.changed = 0; |
fc974ee2 | 2427 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2428 | md_error(mddev, rdev); |
2429 | } | |
2430 | clear_bit(Blocked, &rdev->flags); | |
2431 | clear_bit(BlockedBadBlocks, &rdev->flags); | |
2432 | wake_up(&rdev->blocked_wait); | |
2433 | } | |
2434 | } | |
3a3a5ddb N |
2435 | wake_up(&mddev->sb_wait); |
2436 | return; | |
2437 | } | |
2438 | ||
85572d7c | 2439 | spin_lock(&mddev->lock); |
84692195 | 2440 | |
9ebc6ef1 | 2441 | mddev->utime = ktime_get_real_seconds(); |
3a3a5ddb | 2442 | |
2953079c | 2443 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
850b2b42 | 2444 | force_change = 1; |
2953079c | 2445 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
850b2b42 N |
2446 | /* just a clean<-> dirty transition, possibly leave spares alone, |
2447 | * though if events isn't the right even/odd, we will have to do | |
2448 | * spares after all | |
2449 | */ | |
2450 | nospares = 1; | |
2451 | if (force_change) | |
2452 | nospares = 0; | |
2453 | if (mddev->degraded) | |
84692195 N |
2454 | /* If the array is degraded, then skipping spares is both |
2455 | * dangerous and fairly pointless. | |
2456 | * Dangerous because a device that was removed from the array | |
2457 | * might have a event_count that still looks up-to-date, | |
2458 | * so it can be re-added without a resync. | |
2459 | * Pointless because if there are any spares to skip, | |
2460 | * then a recovery will happen and soon that array won't | |
2461 | * be degraded any more and the spare can go back to sleep then. | |
2462 | */ | |
850b2b42 | 2463 | nospares = 0; |
84692195 | 2464 | |
06d91a5f | 2465 | sync_req = mddev->in_sync; |
42543769 N |
2466 | |
2467 | /* If this is just a dirty<->clean transition, and the array is clean | |
2468 | * and 'events' is odd, we can roll back to the previous clean state */ | |
850b2b42 | 2469 | if (nospares |
42543769 | 2470 | && (mddev->in_sync && mddev->recovery_cp == MaxSector) |
a8707c08 N |
2471 | && mddev->can_decrease_events |
2472 | && mddev->events != 1) { | |
42543769 | 2473 | mddev->events--; |
a8707c08 N |
2474 | mddev->can_decrease_events = 0; |
2475 | } else { | |
42543769 N |
2476 | /* otherwise we have to go forward and ... */ |
2477 | mddev->events ++; | |
a8707c08 | 2478 | mddev->can_decrease_events = nospares; |
42543769 | 2479 | } |
1da177e4 | 2480 | |
403df478 N |
2481 | /* |
2482 | * This 64-bit counter should never wrap. | |
2483 | * Either we are in around ~1 trillion A.C., assuming | |
2484 | * 1 reboot per second, or we have a bug... | |
2485 | */ | |
2486 | WARN_ON(mddev->events == 0); | |
2699b672 | 2487 | |
dafb20fa | 2488 | rdev_for_each(rdev, mddev) { |
2699b672 N |
2489 | if (rdev->badblocks.changed) |
2490 | any_badblocks_changed++; | |
de393cde N |
2491 | if (test_bit(Faulty, &rdev->flags)) |
2492 | set_bit(FaultRecorded, &rdev->flags); | |
2493 | } | |
2699b672 | 2494 | |
e691063a | 2495 | sync_sbs(mddev, nospares); |
85572d7c | 2496 | spin_unlock(&mddev->lock); |
1da177e4 | 2497 | |
36a4e1fe N |
2498 | pr_debug("md: updating %s RAID superblock on device (in sync %d)\n", |
2499 | mdname(mddev), mddev->in_sync); | |
1da177e4 | 2500 | |
504634f6 SL |
2501 | if (mddev->queue) |
2502 | blk_add_trace_msg(mddev->queue, "md md_update_sb"); | |
46533ff7 | 2503 | rewrite: |
4ad13663 | 2504 | bitmap_update_sb(mddev->bitmap); |
dafb20fa | 2505 | rdev_for_each(rdev, mddev) { |
1da177e4 | 2506 | char b[BDEVNAME_SIZE]; |
36a4e1fe | 2507 | |
42543769 N |
2508 | if (rdev->sb_loaded != 1) |
2509 | continue; /* no noise on spare devices */ | |
1da177e4 | 2510 | |
f466722c | 2511 | if (!test_bit(Faulty, &rdev->flags)) { |
7bfa19f2 | 2512 | md_super_write(mddev,rdev, |
0f420358 | 2513 | rdev->sb_start, rdev->sb_size, |
7bfa19f2 | 2514 | rdev->sb_page); |
36a4e1fe N |
2515 | pr_debug("md: (write) %s's sb offset: %llu\n", |
2516 | bdevname(rdev->bdev, b), | |
2517 | (unsigned long long)rdev->sb_start); | |
42543769 | 2518 | rdev->sb_events = mddev->events; |
2699b672 N |
2519 | if (rdev->badblocks.size) { |
2520 | md_super_write(mddev, rdev, | |
2521 | rdev->badblocks.sector, | |
2522 | rdev->badblocks.size << 9, | |
2523 | rdev->bb_page); | |
2524 | rdev->badblocks.size = 0; | |
2525 | } | |
7bfa19f2 | 2526 | |
f466722c | 2527 | } else |
36a4e1fe N |
2528 | pr_debug("md: %s (skipping faulty)\n", |
2529 | bdevname(rdev->bdev, b)); | |
d70ed2e4 | 2530 | |
7bfa19f2 | 2531 | if (mddev->level == LEVEL_MULTIPATH) |
1da177e4 LT |
2532 | /* only need to write one superblock... */ |
2533 | break; | |
2534 | } | |
46533ff7 N |
2535 | if (md_super_wait(mddev) < 0) |
2536 | goto rewrite; | |
2953079c | 2537 | /* if there was a failure, MD_SB_CHANGE_DEVS was set, and we re-write super */ |
7bfa19f2 | 2538 | |
2c97cf13 GJ |
2539 | if (mddev_is_clustered(mddev) && ret == 0) |
2540 | md_cluster_ops->metadata_update_finish(mddev); | |
2541 | ||
850b2b42 | 2542 | if (mddev->in_sync != sync_req || |
2953079c SL |
2543 | !bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2544 | BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_CLEAN))) | |
06d91a5f | 2545 | /* have to write it out again */ |
06d91a5f | 2546 | goto repeat; |
3d310eb7 | 2547 | wake_up(&mddev->sb_wait); |
acb180b0 N |
2548 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
2549 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); | |
06d91a5f | 2550 | |
dafb20fa | 2551 | rdev_for_each(rdev, mddev) { |
de393cde N |
2552 | if (test_and_clear_bit(FaultRecorded, &rdev->flags)) |
2553 | clear_bit(Blocked, &rdev->flags); | |
2554 | ||
2555 | if (any_badblocks_changed) | |
fc974ee2 | 2556 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2557 | clear_bit(BlockedBadBlocks, &rdev->flags); |
2558 | wake_up(&rdev->blocked_wait); | |
2559 | } | |
1da177e4 | 2560 | } |
1aee41f6 | 2561 | EXPORT_SYMBOL(md_update_sb); |
1da177e4 | 2562 | |
a6da4ef8 GR |
2563 | static int add_bound_rdev(struct md_rdev *rdev) |
2564 | { | |
2565 | struct mddev *mddev = rdev->mddev; | |
2566 | int err = 0; | |
87d4d916 | 2567 | bool add_journal = test_bit(Journal, &rdev->flags); |
a6da4ef8 | 2568 | |
87d4d916 | 2569 | if (!mddev->pers->hot_remove_disk || add_journal) { |
a6da4ef8 GR |
2570 | /* If there is hot_add_disk but no hot_remove_disk |
2571 | * then added disks for geometry changes, | |
2572 | * and should be added immediately. | |
2573 | */ | |
2574 | super_types[mddev->major_version]. | |
2575 | validate_super(mddev, rdev); | |
87d4d916 SL |
2576 | if (add_journal) |
2577 | mddev_suspend(mddev); | |
a6da4ef8 | 2578 | err = mddev->pers->hot_add_disk(mddev, rdev); |
87d4d916 SL |
2579 | if (add_journal) |
2580 | mddev_resume(mddev); | |
a6da4ef8 | 2581 | if (err) { |
db767672 | 2582 | md_kick_rdev_from_array(rdev); |
a6da4ef8 GR |
2583 | return err; |
2584 | } | |
2585 | } | |
2586 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2587 | ||
2953079c | 2588 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a6da4ef8 GR |
2589 | if (mddev->degraded) |
2590 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
2591 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
2592 | md_new_event(mddev); | |
2593 | md_wakeup_thread(mddev->thread); | |
2594 | return 0; | |
2595 | } | |
1da177e4 | 2596 | |
7f6ce769 | 2597 | /* words written to sysfs files may, or may not, be \n terminated. |
bce74dac N |
2598 | * We want to accept with case. For this we use cmd_match. |
2599 | */ | |
2600 | static int cmd_match(const char *cmd, const char *str) | |
2601 | { | |
2602 | /* See if cmd, written into a sysfs file, matches | |
2603 | * str. They must either be the same, or cmd can | |
2604 | * have a trailing newline | |
2605 | */ | |
2606 | while (*cmd && *str && *cmd == *str) { | |
2607 | cmd++; | |
2608 | str++; | |
2609 | } | |
2610 | if (*cmd == '\n') | |
2611 | cmd++; | |
2612 | if (*str || *cmd) | |
2613 | return 0; | |
2614 | return 1; | |
2615 | } | |
2616 | ||
86e6ffdd N |
2617 | struct rdev_sysfs_entry { |
2618 | struct attribute attr; | |
3cb03002 N |
2619 | ssize_t (*show)(struct md_rdev *, char *); |
2620 | ssize_t (*store)(struct md_rdev *, const char *, size_t); | |
86e6ffdd N |
2621 | }; |
2622 | ||
2623 | static ssize_t | |
3cb03002 | 2624 | state_show(struct md_rdev *rdev, char *page) |
86e6ffdd | 2625 | { |
35b785f7 | 2626 | char *sep = ","; |
20a49ff6 | 2627 | size_t len = 0; |
758bfc8a | 2628 | unsigned long flags = ACCESS_ONCE(rdev->flags); |
86e6ffdd | 2629 | |
758bfc8a | 2630 | if (test_bit(Faulty, &flags) || |
dcbcb486 TM |
2631 | (!test_bit(ExternalBbl, &flags) && |
2632 | rdev->badblocks.unacked_exist)) | |
35b785f7 TM |
2633 | len += sprintf(page+len, "faulty%s", sep); |
2634 | if (test_bit(In_sync, &flags)) | |
2635 | len += sprintf(page+len, "in_sync%s", sep); | |
2636 | if (test_bit(Journal, &flags)) | |
2637 | len += sprintf(page+len, "journal%s", sep); | |
2638 | if (test_bit(WriteMostly, &flags)) | |
2639 | len += sprintf(page+len, "write_mostly%s", sep); | |
758bfc8a | 2640 | if (test_bit(Blocked, &flags) || |
52c64152 | 2641 | (rdev->badblocks.unacked_exist |
35b785f7 TM |
2642 | && !test_bit(Faulty, &flags))) |
2643 | len += sprintf(page+len, "blocked%s", sep); | |
758bfc8a | 2644 | if (!test_bit(Faulty, &flags) && |
f2076e7d | 2645 | !test_bit(Journal, &flags) && |
35b785f7 TM |
2646 | !test_bit(In_sync, &flags)) |
2647 | len += sprintf(page+len, "spare%s", sep); | |
2648 | if (test_bit(WriteErrorSeen, &flags)) | |
2649 | len += sprintf(page+len, "write_error%s", sep); | |
2650 | if (test_bit(WantReplacement, &flags)) | |
2651 | len += sprintf(page+len, "want_replacement%s", sep); | |
2652 | if (test_bit(Replacement, &flags)) | |
2653 | len += sprintf(page+len, "replacement%s", sep); | |
2654 | if (test_bit(ExternalBbl, &flags)) | |
2655 | len += sprintf(page+len, "external_bbl%s", sep); | |
688834e6 N |
2656 | if (test_bit(FailFast, &flags)) |
2657 | len += sprintf(page+len, "failfast%s", sep); | |
35b785f7 TM |
2658 | |
2659 | if (len) | |
2660 | len -= strlen(sep); | |
2d78f8c4 | 2661 | |
86e6ffdd N |
2662 | return len+sprintf(page+len, "\n"); |
2663 | } | |
2664 | ||
45dc2de1 | 2665 | static ssize_t |
3cb03002 | 2666 | state_store(struct md_rdev *rdev, const char *buf, size_t len) |
45dc2de1 N |
2667 | { |
2668 | /* can write | |
de393cde | 2669 | * faulty - simulates an error |
45dc2de1 | 2670 | * remove - disconnects the device |
f655675b N |
2671 | * writemostly - sets write_mostly |
2672 | * -writemostly - clears write_mostly | |
de393cde N |
2673 | * blocked - sets the Blocked flags |
2674 | * -blocked - clears the Blocked and possibly simulates an error | |
6d56e278 | 2675 | * insync - sets Insync providing device isn't active |
f466722c N |
2676 | * -insync - clear Insync for a device with a slot assigned, |
2677 | * so that it gets rebuilt based on bitmap | |
d7a9d443 N |
2678 | * write_error - sets WriteErrorSeen |
2679 | * -write_error - clears WriteErrorSeen | |
688834e6 | 2680 | * {,-}failfast - set/clear FailFast |
45dc2de1 N |
2681 | */ |
2682 | int err = -EINVAL; | |
2683 | if (cmd_match(buf, "faulty") && rdev->mddev->pers) { | |
2684 | md_error(rdev->mddev, rdev); | |
5ef56c8f N |
2685 | if (test_bit(Faulty, &rdev->flags)) |
2686 | err = 0; | |
2687 | else | |
2688 | err = -EBUSY; | |
45dc2de1 | 2689 | } else if (cmd_match(buf, "remove")) { |
5d881783 SL |
2690 | if (rdev->mddev->pers) { |
2691 | clear_bit(Blocked, &rdev->flags); | |
2692 | remove_and_add_spares(rdev->mddev, rdev); | |
2693 | } | |
45dc2de1 N |
2694 | if (rdev->raid_disk >= 0) |
2695 | err = -EBUSY; | |
2696 | else { | |
fd01b88c | 2697 | struct mddev *mddev = rdev->mddev; |
45dc2de1 | 2698 | err = 0; |
a9720903 GJ |
2699 | if (mddev_is_clustered(mddev)) |
2700 | err = md_cluster_ops->remove_disk(mddev, rdev); | |
2701 | ||
2702 | if (err == 0) { | |
2703 | md_kick_rdev_from_array(rdev); | |
060b0689 | 2704 | if (mddev->pers) { |
2953079c | 2705 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
2706 | md_wakeup_thread(mddev->thread); |
2707 | } | |
a9720903 GJ |
2708 | md_new_event(mddev); |
2709 | } | |
45dc2de1 | 2710 | } |
f655675b N |
2711 | } else if (cmd_match(buf, "writemostly")) { |
2712 | set_bit(WriteMostly, &rdev->flags); | |
2713 | err = 0; | |
2714 | } else if (cmd_match(buf, "-writemostly")) { | |
2715 | clear_bit(WriteMostly, &rdev->flags); | |
6bfe0b49 DW |
2716 | err = 0; |
2717 | } else if (cmd_match(buf, "blocked")) { | |
2718 | set_bit(Blocked, &rdev->flags); | |
2719 | err = 0; | |
2720 | } else if (cmd_match(buf, "-blocked")) { | |
de393cde | 2721 | if (!test_bit(Faulty, &rdev->flags) && |
dcbcb486 | 2722 | !test_bit(ExternalBbl, &rdev->flags) && |
7da64a0a | 2723 | rdev->badblocks.unacked_exist) { |
de393cde N |
2724 | /* metadata handler doesn't understand badblocks, |
2725 | * so we need to fail the device | |
2726 | */ | |
2727 | md_error(rdev->mddev, rdev); | |
2728 | } | |
6bfe0b49 | 2729 | clear_bit(Blocked, &rdev->flags); |
de393cde | 2730 | clear_bit(BlockedBadBlocks, &rdev->flags); |
6bfe0b49 DW |
2731 | wake_up(&rdev->blocked_wait); |
2732 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
2733 | md_wakeup_thread(rdev->mddev->thread); | |
2734 | ||
6d56e278 N |
2735 | err = 0; |
2736 | } else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) { | |
2737 | set_bit(In_sync, &rdev->flags); | |
f655675b | 2738 | err = 0; |
688834e6 N |
2739 | } else if (cmd_match(buf, "failfast")) { |
2740 | set_bit(FailFast, &rdev->flags); | |
2741 | err = 0; | |
2742 | } else if (cmd_match(buf, "-failfast")) { | |
2743 | clear_bit(FailFast, &rdev->flags); | |
2744 | err = 0; | |
f2076e7d SL |
2745 | } else if (cmd_match(buf, "-insync") && rdev->raid_disk >= 0 && |
2746 | !test_bit(Journal, &rdev->flags)) { | |
e1960f8c N |
2747 | if (rdev->mddev->pers == NULL) { |
2748 | clear_bit(In_sync, &rdev->flags); | |
2749 | rdev->saved_raid_disk = rdev->raid_disk; | |
2750 | rdev->raid_disk = -1; | |
2751 | err = 0; | |
2752 | } | |
d7a9d443 N |
2753 | } else if (cmd_match(buf, "write_error")) { |
2754 | set_bit(WriteErrorSeen, &rdev->flags); | |
2755 | err = 0; | |
2756 | } else if (cmd_match(buf, "-write_error")) { | |
2757 | clear_bit(WriteErrorSeen, &rdev->flags); | |
2758 | err = 0; | |
2d78f8c4 N |
2759 | } else if (cmd_match(buf, "want_replacement")) { |
2760 | /* Any non-spare device that is not a replacement can | |
2761 | * become want_replacement at any time, but we then need to | |
2762 | * check if recovery is needed. | |
2763 | */ | |
2764 | if (rdev->raid_disk >= 0 && | |
f2076e7d | 2765 | !test_bit(Journal, &rdev->flags) && |
2d78f8c4 N |
2766 | !test_bit(Replacement, &rdev->flags)) |
2767 | set_bit(WantReplacement, &rdev->flags); | |
2768 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
2769 | md_wakeup_thread(rdev->mddev->thread); | |
2770 | err = 0; | |
2771 | } else if (cmd_match(buf, "-want_replacement")) { | |
2772 | /* Clearing 'want_replacement' is always allowed. | |
2773 | * Once replacements starts it is too late though. | |
2774 | */ | |
2775 | err = 0; | |
2776 | clear_bit(WantReplacement, &rdev->flags); | |
2777 | } else if (cmd_match(buf, "replacement")) { | |
2778 | /* Can only set a device as a replacement when array has not | |
2779 | * yet been started. Once running, replacement is automatic | |
2780 | * from spares, or by assigning 'slot'. | |
2781 | */ | |
2782 | if (rdev->mddev->pers) | |
2783 | err = -EBUSY; | |
2784 | else { | |
2785 | set_bit(Replacement, &rdev->flags); | |
2786 | err = 0; | |
2787 | } | |
2788 | } else if (cmd_match(buf, "-replacement")) { | |
2789 | /* Similarly, can only clear Replacement before start */ | |
2790 | if (rdev->mddev->pers) | |
2791 | err = -EBUSY; | |
2792 | else { | |
2793 | clear_bit(Replacement, &rdev->flags); | |
2794 | err = 0; | |
2795 | } | |
a6da4ef8 GR |
2796 | } else if (cmd_match(buf, "re-add")) { |
2797 | if (test_bit(Faulty, &rdev->flags) && (rdev->raid_disk == -1)) { | |
97f6cd39 GR |
2798 | /* clear_bit is performed _after_ all the devices |
2799 | * have their local Faulty bit cleared. If any writes | |
2800 | * happen in the meantime in the local node, they | |
2801 | * will land in the local bitmap, which will be synced | |
2802 | * by this node eventually | |
2803 | */ | |
2804 | if (!mddev_is_clustered(rdev->mddev) || | |
2805 | (err = md_cluster_ops->gather_bitmaps(rdev)) == 0) { | |
2806 | clear_bit(Faulty, &rdev->flags); | |
2807 | err = add_bound_rdev(rdev); | |
2808 | } | |
a6da4ef8 GR |
2809 | } else |
2810 | err = -EBUSY; | |
35b785f7 TM |
2811 | } else if (cmd_match(buf, "external_bbl") && (rdev->mddev->external)) { |
2812 | set_bit(ExternalBbl, &rdev->flags); | |
2813 | rdev->badblocks.shift = 0; | |
2814 | err = 0; | |
2815 | } else if (cmd_match(buf, "-external_bbl") && (rdev->mddev->external)) { | |
2816 | clear_bit(ExternalBbl, &rdev->flags); | |
2817 | err = 0; | |
45dc2de1 | 2818 | } |
00bcb4ac N |
2819 | if (!err) |
2820 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
45dc2de1 N |
2821 | return err ? err : len; |
2822 | } | |
80ca3a44 | 2823 | static struct rdev_sysfs_entry rdev_state = |
750f199e | 2824 | __ATTR_PREALLOC(state, S_IRUGO|S_IWUSR, state_show, state_store); |
86e6ffdd | 2825 | |
4dbcdc75 | 2826 | static ssize_t |
3cb03002 | 2827 | errors_show(struct md_rdev *rdev, char *page) |
4dbcdc75 N |
2828 | { |
2829 | return sprintf(page, "%d\n", atomic_read(&rdev->corrected_errors)); | |
2830 | } | |
2831 | ||
2832 | static ssize_t | |
3cb03002 | 2833 | errors_store(struct md_rdev *rdev, const char *buf, size_t len) |
4dbcdc75 | 2834 | { |
4c9309c0 AD |
2835 | unsigned int n; |
2836 | int rv; | |
2837 | ||
2838 | rv = kstrtouint(buf, 10, &n); | |
2839 | if (rv < 0) | |
2840 | return rv; | |
2841 | atomic_set(&rdev->corrected_errors, n); | |
2842 | return len; | |
4dbcdc75 N |
2843 | } |
2844 | static struct rdev_sysfs_entry rdev_errors = | |
80ca3a44 | 2845 | __ATTR(errors, S_IRUGO|S_IWUSR, errors_show, errors_store); |
4dbcdc75 | 2846 | |
014236d2 | 2847 | static ssize_t |
3cb03002 | 2848 | slot_show(struct md_rdev *rdev, char *page) |
014236d2 | 2849 | { |
f2076e7d SL |
2850 | if (test_bit(Journal, &rdev->flags)) |
2851 | return sprintf(page, "journal\n"); | |
2852 | else if (rdev->raid_disk < 0) | |
014236d2 N |
2853 | return sprintf(page, "none\n"); |
2854 | else | |
2855 | return sprintf(page, "%d\n", rdev->raid_disk); | |
2856 | } | |
2857 | ||
2858 | static ssize_t | |
3cb03002 | 2859 | slot_store(struct md_rdev *rdev, const char *buf, size_t len) |
014236d2 | 2860 | { |
4c9309c0 | 2861 | int slot; |
c303da6d | 2862 | int err; |
4c9309c0 | 2863 | |
f2076e7d SL |
2864 | if (test_bit(Journal, &rdev->flags)) |
2865 | return -EBUSY; | |
014236d2 N |
2866 | if (strncmp(buf, "none", 4)==0) |
2867 | slot = -1; | |
4c9309c0 AD |
2868 | else { |
2869 | err = kstrtouint(buf, 10, (unsigned int *)&slot); | |
2870 | if (err < 0) | |
2871 | return err; | |
2872 | } | |
6c2fce2e | 2873 | if (rdev->mddev->pers && slot == -1) { |
c303da6d N |
2874 | /* Setting 'slot' on an active array requires also |
2875 | * updating the 'rd%d' link, and communicating | |
2876 | * with the personality with ->hot_*_disk. | |
2877 | * For now we only support removing | |
2878 | * failed/spare devices. This normally happens automatically, | |
2879 | * but not when the metadata is externally managed. | |
2880 | */ | |
c303da6d N |
2881 | if (rdev->raid_disk == -1) |
2882 | return -EEXIST; | |
2883 | /* personality does all needed checks */ | |
01393f3d | 2884 | if (rdev->mddev->pers->hot_remove_disk == NULL) |
c303da6d | 2885 | return -EINVAL; |
746d3207 N |
2886 | clear_bit(Blocked, &rdev->flags); |
2887 | remove_and_add_spares(rdev->mddev, rdev); | |
2888 | if (rdev->raid_disk >= 0) | |
2889 | return -EBUSY; | |
c303da6d N |
2890 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); |
2891 | md_wakeup_thread(rdev->mddev->thread); | |
6c2fce2e | 2892 | } else if (rdev->mddev->pers) { |
6c2fce2e | 2893 | /* Activating a spare .. or possibly reactivating |
6d56e278 | 2894 | * if we ever get bitmaps working here. |
6c2fce2e | 2895 | */ |
cb01c549 | 2896 | int err; |
6c2fce2e NB |
2897 | |
2898 | if (rdev->raid_disk != -1) | |
2899 | return -EBUSY; | |
2900 | ||
c6751b2b N |
2901 | if (test_bit(MD_RECOVERY_RUNNING, &rdev->mddev->recovery)) |
2902 | return -EBUSY; | |
2903 | ||
6c2fce2e NB |
2904 | if (rdev->mddev->pers->hot_add_disk == NULL) |
2905 | return -EINVAL; | |
2906 | ||
ba1b41b6 N |
2907 | if (slot >= rdev->mddev->raid_disks && |
2908 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
2909 | return -ENOSPC; | |
2910 | ||
6c2fce2e NB |
2911 | rdev->raid_disk = slot; |
2912 | if (test_bit(In_sync, &rdev->flags)) | |
2913 | rdev->saved_raid_disk = slot; | |
2914 | else | |
2915 | rdev->saved_raid_disk = -1; | |
d30519fc | 2916 | clear_bit(In_sync, &rdev->flags); |
8313b8e5 | 2917 | clear_bit(Bitmap_sync, &rdev->flags); |
cb01c549 GR |
2918 | err = rdev->mddev->pers-> |
2919 | hot_add_disk(rdev->mddev, rdev); | |
2920 | if (err) { | |
2921 | rdev->raid_disk = -1; | |
2922 | return err; | |
2923 | } else | |
2924 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2925 | if (sysfs_link_rdev(rdev->mddev, rdev)) | |
2926 | /* failure here is OK */; | |
6c2fce2e | 2927 | /* don't wakeup anyone, leave that to userspace. */ |
c303da6d | 2928 | } else { |
ba1b41b6 N |
2929 | if (slot >= rdev->mddev->raid_disks && |
2930 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
c303da6d N |
2931 | return -ENOSPC; |
2932 | rdev->raid_disk = slot; | |
2933 | /* assume it is working */ | |
c5d79adb N |
2934 | clear_bit(Faulty, &rdev->flags); |
2935 | clear_bit(WriteMostly, &rdev->flags); | |
c303da6d | 2936 | set_bit(In_sync, &rdev->flags); |
00bcb4ac | 2937 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
c303da6d | 2938 | } |
014236d2 N |
2939 | return len; |
2940 | } | |
2941 | ||
014236d2 | 2942 | static struct rdev_sysfs_entry rdev_slot = |
80ca3a44 | 2943 | __ATTR(slot, S_IRUGO|S_IWUSR, slot_show, slot_store); |
014236d2 | 2944 | |
93c8cad0 | 2945 | static ssize_t |
3cb03002 | 2946 | offset_show(struct md_rdev *rdev, char *page) |
93c8cad0 | 2947 | { |
6961ece4 | 2948 | return sprintf(page, "%llu\n", (unsigned long long)rdev->data_offset); |
93c8cad0 N |
2949 | } |
2950 | ||
2951 | static ssize_t | |
3cb03002 | 2952 | offset_store(struct md_rdev *rdev, const char *buf, size_t len) |
93c8cad0 | 2953 | { |
c6563a8c | 2954 | unsigned long long offset; |
b29bebd6 | 2955 | if (kstrtoull(buf, 10, &offset) < 0) |
93c8cad0 | 2956 | return -EINVAL; |
8ed0a521 | 2957 | if (rdev->mddev->pers && rdev->raid_disk >= 0) |
93c8cad0 | 2958 | return -EBUSY; |
dd8ac336 | 2959 | if (rdev->sectors && rdev->mddev->external) |
c5d79adb N |
2960 | /* Must set offset before size, so overlap checks |
2961 | * can be sane */ | |
2962 | return -EBUSY; | |
93c8cad0 | 2963 | rdev->data_offset = offset; |
25f7fd47 | 2964 | rdev->new_data_offset = offset; |
93c8cad0 N |
2965 | return len; |
2966 | } | |
2967 | ||
2968 | static struct rdev_sysfs_entry rdev_offset = | |
80ca3a44 | 2969 | __ATTR(offset, S_IRUGO|S_IWUSR, offset_show, offset_store); |
93c8cad0 | 2970 | |
c6563a8c N |
2971 | static ssize_t new_offset_show(struct md_rdev *rdev, char *page) |
2972 | { | |
2973 | return sprintf(page, "%llu\n", | |
2974 | (unsigned long long)rdev->new_data_offset); | |
2975 | } | |
2976 | ||
2977 | static ssize_t new_offset_store(struct md_rdev *rdev, | |
2978 | const char *buf, size_t len) | |
2979 | { | |
2980 | unsigned long long new_offset; | |
2981 | struct mddev *mddev = rdev->mddev; | |
2982 | ||
b29bebd6 | 2983 | if (kstrtoull(buf, 10, &new_offset) < 0) |
c6563a8c N |
2984 | return -EINVAL; |
2985 | ||
f851b60d N |
2986 | if (mddev->sync_thread || |
2987 | test_bit(MD_RECOVERY_RUNNING,&mddev->recovery)) | |
c6563a8c N |
2988 | return -EBUSY; |
2989 | if (new_offset == rdev->data_offset) | |
2990 | /* reset is always permitted */ | |
2991 | ; | |
2992 | else if (new_offset > rdev->data_offset) { | |
2993 | /* must not push array size beyond rdev_sectors */ | |
2994 | if (new_offset - rdev->data_offset | |
2995 | + mddev->dev_sectors > rdev->sectors) | |
2996 | return -E2BIG; | |
2997 | } | |
2998 | /* Metadata worries about other space details. */ | |
2999 | ||
3000 | /* decreasing the offset is inconsistent with a backwards | |
3001 | * reshape. | |
3002 | */ | |
3003 | if (new_offset < rdev->data_offset && | |
3004 | mddev->reshape_backwards) | |
3005 | return -EINVAL; | |
3006 | /* Increasing offset is inconsistent with forwards | |
3007 | * reshape. reshape_direction should be set to | |
3008 | * 'backwards' first. | |
3009 | */ | |
3010 | if (new_offset > rdev->data_offset && | |
3011 | !mddev->reshape_backwards) | |
3012 | return -EINVAL; | |
3013 | ||
3014 | if (mddev->pers && mddev->persistent && | |
3015 | !super_types[mddev->major_version] | |
3016 | .allow_new_offset(rdev, new_offset)) | |
3017 | return -E2BIG; | |
3018 | rdev->new_data_offset = new_offset; | |
3019 | if (new_offset > rdev->data_offset) | |
3020 | mddev->reshape_backwards = 1; | |
3021 | else if (new_offset < rdev->data_offset) | |
3022 | mddev->reshape_backwards = 0; | |
3023 | ||
3024 | return len; | |
3025 | } | |
3026 | static struct rdev_sysfs_entry rdev_new_offset = | |
3027 | __ATTR(new_offset, S_IRUGO|S_IWUSR, new_offset_show, new_offset_store); | |
3028 | ||
83303b61 | 3029 | static ssize_t |
3cb03002 | 3030 | rdev_size_show(struct md_rdev *rdev, char *page) |
83303b61 | 3031 | { |
dd8ac336 | 3032 | return sprintf(page, "%llu\n", (unsigned long long)rdev->sectors / 2); |
83303b61 N |
3033 | } |
3034 | ||
c5d79adb N |
3035 | static int overlaps(sector_t s1, sector_t l1, sector_t s2, sector_t l2) |
3036 | { | |
3037 | /* check if two start/length pairs overlap */ | |
3038 | if (s1+l1 <= s2) | |
3039 | return 0; | |
3040 | if (s2+l2 <= s1) | |
3041 | return 0; | |
3042 | return 1; | |
3043 | } | |
3044 | ||
b522adcd DW |
3045 | static int strict_blocks_to_sectors(const char *buf, sector_t *sectors) |
3046 | { | |
3047 | unsigned long long blocks; | |
3048 | sector_t new; | |
3049 | ||
b29bebd6 | 3050 | if (kstrtoull(buf, 10, &blocks) < 0) |
b522adcd DW |
3051 | return -EINVAL; |
3052 | ||
3053 | if (blocks & 1ULL << (8 * sizeof(blocks) - 1)) | |
3054 | return -EINVAL; /* sector conversion overflow */ | |
3055 | ||
3056 | new = blocks * 2; | |
3057 | if (new != blocks * 2) | |
3058 | return -EINVAL; /* unsigned long long to sector_t overflow */ | |
3059 | ||
3060 | *sectors = new; | |
3061 | return 0; | |
3062 | } | |
3063 | ||
83303b61 | 3064 | static ssize_t |
3cb03002 | 3065 | rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len) |
83303b61 | 3066 | { |
fd01b88c | 3067 | struct mddev *my_mddev = rdev->mddev; |
dd8ac336 | 3068 | sector_t oldsectors = rdev->sectors; |
b522adcd | 3069 | sector_t sectors; |
27c529bb | 3070 | |
f2076e7d SL |
3071 | if (test_bit(Journal, &rdev->flags)) |
3072 | return -EBUSY; | |
b522adcd | 3073 | if (strict_blocks_to_sectors(buf, §ors) < 0) |
d7027458 | 3074 | return -EINVAL; |
c6563a8c N |
3075 | if (rdev->data_offset != rdev->new_data_offset) |
3076 | return -EINVAL; /* too confusing */ | |
0cd17fec | 3077 | if (my_mddev->pers && rdev->raid_disk >= 0) { |
d7027458 | 3078 | if (my_mddev->persistent) { |
dd8ac336 AN |
3079 | sectors = super_types[my_mddev->major_version]. |
3080 | rdev_size_change(rdev, sectors); | |
3081 | if (!sectors) | |
0cd17fec | 3082 | return -EBUSY; |
dd8ac336 | 3083 | } else if (!sectors) |
77304d2a | 3084 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9) - |
dd8ac336 | 3085 | rdev->data_offset; |
a6468539 N |
3086 | if (!my_mddev->pers->resize) |
3087 | /* Cannot change size for RAID0 or Linear etc */ | |
3088 | return -EINVAL; | |
0cd17fec | 3089 | } |
dd8ac336 | 3090 | if (sectors < my_mddev->dev_sectors) |
7d3c6f87 | 3091 | return -EINVAL; /* component must fit device */ |
0cd17fec | 3092 | |
dd8ac336 AN |
3093 | rdev->sectors = sectors; |
3094 | if (sectors > oldsectors && my_mddev->external) { | |
8b1afc3d N |
3095 | /* Need to check that all other rdevs with the same |
3096 | * ->bdev do not overlap. 'rcu' is sufficient to walk | |
3097 | * the rdev lists safely. | |
3098 | * This check does not provide a hard guarantee, it | |
3099 | * just helps avoid dangerous mistakes. | |
c5d79adb | 3100 | */ |
fd01b88c | 3101 | struct mddev *mddev; |
c5d79adb | 3102 | int overlap = 0; |
159ec1fc | 3103 | struct list_head *tmp; |
c5d79adb | 3104 | |
8b1afc3d | 3105 | rcu_read_lock(); |
29ac4aa3 | 3106 | for_each_mddev(mddev, tmp) { |
3cb03002 | 3107 | struct md_rdev *rdev2; |
c5d79adb | 3108 | |
dafb20fa | 3109 | rdev_for_each(rdev2, mddev) |
f21e9ff7 N |
3110 | if (rdev->bdev == rdev2->bdev && |
3111 | rdev != rdev2 && | |
3112 | overlaps(rdev->data_offset, rdev->sectors, | |
3113 | rdev2->data_offset, | |
3114 | rdev2->sectors)) { | |
c5d79adb N |
3115 | overlap = 1; |
3116 | break; | |
3117 | } | |
c5d79adb N |
3118 | if (overlap) { |
3119 | mddev_put(mddev); | |
3120 | break; | |
3121 | } | |
3122 | } | |
8b1afc3d | 3123 | rcu_read_unlock(); |
c5d79adb N |
3124 | if (overlap) { |
3125 | /* Someone else could have slipped in a size | |
3126 | * change here, but doing so is just silly. | |
dd8ac336 | 3127 | * We put oldsectors back because we *know* it is |
c5d79adb N |
3128 | * safe, and trust userspace not to race with |
3129 | * itself | |
3130 | */ | |
dd8ac336 | 3131 | rdev->sectors = oldsectors; |
c5d79adb N |
3132 | return -EBUSY; |
3133 | } | |
3134 | } | |
83303b61 N |
3135 | return len; |
3136 | } | |
3137 | ||
3138 | static struct rdev_sysfs_entry rdev_size = | |
80ca3a44 | 3139 | __ATTR(size, S_IRUGO|S_IWUSR, rdev_size_show, rdev_size_store); |
83303b61 | 3140 | |
3cb03002 | 3141 | static ssize_t recovery_start_show(struct md_rdev *rdev, char *page) |
06e3c817 DW |
3142 | { |
3143 | unsigned long long recovery_start = rdev->recovery_offset; | |
3144 | ||
3145 | if (test_bit(In_sync, &rdev->flags) || | |
3146 | recovery_start == MaxSector) | |
3147 | return sprintf(page, "none\n"); | |
3148 | ||
3149 | return sprintf(page, "%llu\n", recovery_start); | |
3150 | } | |
3151 | ||
3cb03002 | 3152 | static ssize_t recovery_start_store(struct md_rdev *rdev, const char *buf, size_t len) |
06e3c817 DW |
3153 | { |
3154 | unsigned long long recovery_start; | |
3155 | ||
3156 | if (cmd_match(buf, "none")) | |
3157 | recovery_start = MaxSector; | |
b29bebd6 | 3158 | else if (kstrtoull(buf, 10, &recovery_start)) |
06e3c817 DW |
3159 | return -EINVAL; |
3160 | ||
3161 | if (rdev->mddev->pers && | |
3162 | rdev->raid_disk >= 0) | |
3163 | return -EBUSY; | |
3164 | ||
3165 | rdev->recovery_offset = recovery_start; | |
3166 | if (recovery_start == MaxSector) | |
3167 | set_bit(In_sync, &rdev->flags); | |
3168 | else | |
3169 | clear_bit(In_sync, &rdev->flags); | |
3170 | return len; | |
3171 | } | |
3172 | ||
3173 | static struct rdev_sysfs_entry rdev_recovery_start = | |
3174 | __ATTR(recovery_start, S_IRUGO|S_IWUSR, recovery_start_show, recovery_start_store); | |
3175 | ||
fc974ee2 VV |
3176 | /* sysfs access to bad-blocks list. |
3177 | * We present two files. | |
3178 | * 'bad-blocks' lists sector numbers and lengths of ranges that | |
3179 | * are recorded as bad. The list is truncated to fit within | |
3180 | * the one-page limit of sysfs. | |
3181 | * Writing "sector length" to this file adds an acknowledged | |
3182 | * bad block list. | |
3183 | * 'unacknowledged-bad-blocks' lists bad blocks that have not yet | |
3184 | * been acknowledged. Writing to this file adds bad blocks | |
3185 | * without acknowledging them. This is largely for testing. | |
3186 | */ | |
3cb03002 | 3187 | static ssize_t bb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3188 | { |
3189 | return badblocks_show(&rdev->badblocks, page, 0); | |
3190 | } | |
3cb03002 | 3191 | static ssize_t bb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 | 3192 | { |
de393cde N |
3193 | int rv = badblocks_store(&rdev->badblocks, page, len, 0); |
3194 | /* Maybe that ack was all we needed */ | |
3195 | if (test_and_clear_bit(BlockedBadBlocks, &rdev->flags)) | |
3196 | wake_up(&rdev->blocked_wait); | |
3197 | return rv; | |
16c791a5 N |
3198 | } |
3199 | static struct rdev_sysfs_entry rdev_bad_blocks = | |
3200 | __ATTR(bad_blocks, S_IRUGO|S_IWUSR, bb_show, bb_store); | |
3201 | ||
3cb03002 | 3202 | static ssize_t ubb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3203 | { |
3204 | return badblocks_show(&rdev->badblocks, page, 1); | |
3205 | } | |
3cb03002 | 3206 | static ssize_t ubb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 N |
3207 | { |
3208 | return badblocks_store(&rdev->badblocks, page, len, 1); | |
3209 | } | |
3210 | static struct rdev_sysfs_entry rdev_unack_bad_blocks = | |
3211 | __ATTR(unacknowledged_bad_blocks, S_IRUGO|S_IWUSR, ubb_show, ubb_store); | |
3212 | ||
664aed04 AP |
3213 | static ssize_t |
3214 | ppl_sector_show(struct md_rdev *rdev, char *page) | |
3215 | { | |
3216 | return sprintf(page, "%llu\n", (unsigned long long)rdev->ppl.sector); | |
3217 | } | |
3218 | ||
3219 | static ssize_t | |
3220 | ppl_sector_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3221 | { | |
3222 | unsigned long long sector; | |
3223 | ||
3224 | if (kstrtoull(buf, 10, §or) < 0) | |
3225 | return -EINVAL; | |
3226 | if (sector != (sector_t)sector) | |
3227 | return -EINVAL; | |
3228 | ||
3229 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3230 | rdev->raid_disk >= 0) | |
3231 | return -EBUSY; | |
3232 | ||
3233 | if (rdev->mddev->persistent) { | |
3234 | if (rdev->mddev->major_version == 0) | |
3235 | return -EINVAL; | |
3236 | if ((sector > rdev->sb_start && | |
3237 | sector - rdev->sb_start > S16_MAX) || | |
3238 | (sector < rdev->sb_start && | |
3239 | rdev->sb_start - sector > -S16_MIN)) | |
3240 | return -EINVAL; | |
3241 | rdev->ppl.offset = sector - rdev->sb_start; | |
3242 | } else if (!rdev->mddev->external) { | |
3243 | return -EBUSY; | |
3244 | } | |
3245 | rdev->ppl.sector = sector; | |
3246 | return len; | |
3247 | } | |
3248 | ||
3249 | static struct rdev_sysfs_entry rdev_ppl_sector = | |
3250 | __ATTR(ppl_sector, S_IRUGO|S_IWUSR, ppl_sector_show, ppl_sector_store); | |
3251 | ||
3252 | static ssize_t | |
3253 | ppl_size_show(struct md_rdev *rdev, char *page) | |
3254 | { | |
3255 | return sprintf(page, "%u\n", rdev->ppl.size); | |
3256 | } | |
3257 | ||
3258 | static ssize_t | |
3259 | ppl_size_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3260 | { | |
3261 | unsigned int size; | |
3262 | ||
3263 | if (kstrtouint(buf, 10, &size) < 0) | |
3264 | return -EINVAL; | |
3265 | ||
3266 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3267 | rdev->raid_disk >= 0) | |
3268 | return -EBUSY; | |
3269 | ||
3270 | if (rdev->mddev->persistent) { | |
3271 | if (rdev->mddev->major_version == 0) | |
3272 | return -EINVAL; | |
3273 | if (size > U16_MAX) | |
3274 | return -EINVAL; | |
3275 | } else if (!rdev->mddev->external) { | |
3276 | return -EBUSY; | |
3277 | } | |
3278 | rdev->ppl.size = size; | |
3279 | return len; | |
3280 | } | |
3281 | ||
3282 | static struct rdev_sysfs_entry rdev_ppl_size = | |
3283 | __ATTR(ppl_size, S_IRUGO|S_IWUSR, ppl_size_show, ppl_size_store); | |
3284 | ||
86e6ffdd N |
3285 | static struct attribute *rdev_default_attrs[] = { |
3286 | &rdev_state.attr, | |
4dbcdc75 | 3287 | &rdev_errors.attr, |
014236d2 | 3288 | &rdev_slot.attr, |
93c8cad0 | 3289 | &rdev_offset.attr, |
c6563a8c | 3290 | &rdev_new_offset.attr, |
83303b61 | 3291 | &rdev_size.attr, |
06e3c817 | 3292 | &rdev_recovery_start.attr, |
16c791a5 N |
3293 | &rdev_bad_blocks.attr, |
3294 | &rdev_unack_bad_blocks.attr, | |
664aed04 AP |
3295 | &rdev_ppl_sector.attr, |
3296 | &rdev_ppl_size.attr, | |
86e6ffdd N |
3297 | NULL, |
3298 | }; | |
3299 | static ssize_t | |
3300 | rdev_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
3301 | { | |
3302 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3303 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
86e6ffdd N |
3304 | |
3305 | if (!entry->show) | |
3306 | return -EIO; | |
758bfc8a N |
3307 | if (!rdev->mddev) |
3308 | return -EBUSY; | |
3309 | return entry->show(rdev, page); | |
86e6ffdd N |
3310 | } |
3311 | ||
3312 | static ssize_t | |
3313 | rdev_attr_store(struct kobject *kobj, struct attribute *attr, | |
3314 | const char *page, size_t length) | |
3315 | { | |
3316 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3317 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
27c529bb | 3318 | ssize_t rv; |
fd01b88c | 3319 | struct mddev *mddev = rdev->mddev; |
86e6ffdd N |
3320 | |
3321 | if (!entry->store) | |
3322 | return -EIO; | |
67463acb N |
3323 | if (!capable(CAP_SYS_ADMIN)) |
3324 | return -EACCES; | |
27c529bb | 3325 | rv = mddev ? mddev_lock(mddev): -EBUSY; |
ca388059 | 3326 | if (!rv) { |
27c529bb N |
3327 | if (rdev->mddev == NULL) |
3328 | rv = -EBUSY; | |
3329 | else | |
3330 | rv = entry->store(rdev, page, length); | |
6a51830e | 3331 | mddev_unlock(mddev); |
ca388059 N |
3332 | } |
3333 | return rv; | |
86e6ffdd N |
3334 | } |
3335 | ||
3336 | static void rdev_free(struct kobject *ko) | |
3337 | { | |
3cb03002 | 3338 | struct md_rdev *rdev = container_of(ko, struct md_rdev, kobj); |
86e6ffdd N |
3339 | kfree(rdev); |
3340 | } | |
52cf25d0 | 3341 | static const struct sysfs_ops rdev_sysfs_ops = { |
86e6ffdd N |
3342 | .show = rdev_attr_show, |
3343 | .store = rdev_attr_store, | |
3344 | }; | |
3345 | static struct kobj_type rdev_ktype = { | |
3346 | .release = rdev_free, | |
3347 | .sysfs_ops = &rdev_sysfs_ops, | |
3348 | .default_attrs = rdev_default_attrs, | |
3349 | }; | |
3350 | ||
3cb03002 | 3351 | int md_rdev_init(struct md_rdev *rdev) |
e8bb9a83 N |
3352 | { |
3353 | rdev->desc_nr = -1; | |
3354 | rdev->saved_raid_disk = -1; | |
3355 | rdev->raid_disk = -1; | |
3356 | rdev->flags = 0; | |
3357 | rdev->data_offset = 0; | |
c6563a8c | 3358 | rdev->new_data_offset = 0; |
e8bb9a83 | 3359 | rdev->sb_events = 0; |
0e3ef49e | 3360 | rdev->last_read_error = 0; |
2699b672 N |
3361 | rdev->sb_loaded = 0; |
3362 | rdev->bb_page = NULL; | |
e8bb9a83 N |
3363 | atomic_set(&rdev->nr_pending, 0); |
3364 | atomic_set(&rdev->read_errors, 0); | |
3365 | atomic_set(&rdev->corrected_errors, 0); | |
3366 | ||
3367 | INIT_LIST_HEAD(&rdev->same_set); | |
3368 | init_waitqueue_head(&rdev->blocked_wait); | |
2230dfe4 N |
3369 | |
3370 | /* Add space to store bad block list. | |
3371 | * This reserves the space even on arrays where it cannot | |
3372 | * be used - I wonder if that matters | |
3373 | */ | |
fc974ee2 | 3374 | return badblocks_init(&rdev->badblocks, 0); |
e8bb9a83 N |
3375 | } |
3376 | EXPORT_SYMBOL_GPL(md_rdev_init); | |
1da177e4 LT |
3377 | /* |
3378 | * Import a device. If 'super_format' >= 0, then sanity check the superblock | |
3379 | * | |
3380 | * mark the device faulty if: | |
3381 | * | |
3382 | * - the device is nonexistent (zero size) | |
3383 | * - the device has no valid superblock | |
3384 | * | |
3385 | * a faulty rdev _never_ has rdev->sb set. | |
3386 | */ | |
3cb03002 | 3387 | static struct md_rdev *md_import_device(dev_t newdev, int super_format, int super_minor) |
1da177e4 LT |
3388 | { |
3389 | char b[BDEVNAME_SIZE]; | |
3390 | int err; | |
3cb03002 | 3391 | struct md_rdev *rdev; |
1da177e4 LT |
3392 | sector_t size; |
3393 | ||
9ffae0cf | 3394 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
9d48739e | 3395 | if (!rdev) |
1da177e4 | 3396 | return ERR_PTR(-ENOMEM); |
1da177e4 | 3397 | |
2230dfe4 N |
3398 | err = md_rdev_init(rdev); |
3399 | if (err) | |
3400 | goto abort_free; | |
3401 | err = alloc_disk_sb(rdev); | |
3402 | if (err) | |
1da177e4 LT |
3403 | goto abort_free; |
3404 | ||
c5d79adb | 3405 | err = lock_rdev(rdev, newdev, super_format == -2); |
1da177e4 LT |
3406 | if (err) |
3407 | goto abort_free; | |
3408 | ||
f9cb074b | 3409 | kobject_init(&rdev->kobj, &rdev_ktype); |
86e6ffdd | 3410 | |
77304d2a | 3411 | size = i_size_read(rdev->bdev->bd_inode) >> BLOCK_SIZE_BITS; |
1da177e4 | 3412 | if (!size) { |
9d48739e | 3413 | pr_warn("md: %s has zero or unknown size, marking faulty!\n", |
1da177e4 LT |
3414 | bdevname(rdev->bdev,b)); |
3415 | err = -EINVAL; | |
3416 | goto abort_free; | |
3417 | } | |
3418 | ||
3419 | if (super_format >= 0) { | |
3420 | err = super_types[super_format]. | |
3421 | load_super(rdev, NULL, super_minor); | |
3422 | if (err == -EINVAL) { | |
9d48739e | 3423 | pr_warn("md: %s does not have a valid v%d.%d superblock, not importing!\n", |
df968c4e | 3424 | bdevname(rdev->bdev,b), |
9d48739e | 3425 | super_format, super_minor); |
1da177e4 LT |
3426 | goto abort_free; |
3427 | } | |
3428 | if (err < 0) { | |
9d48739e | 3429 | pr_warn("md: could not read %s's sb, not importing!\n", |
1da177e4 LT |
3430 | bdevname(rdev->bdev,b)); |
3431 | goto abort_free; | |
3432 | } | |
3433 | } | |
6bfe0b49 | 3434 | |
1da177e4 LT |
3435 | return rdev; |
3436 | ||
3437 | abort_free: | |
2699b672 N |
3438 | if (rdev->bdev) |
3439 | unlock_rdev(rdev); | |
545c8795 | 3440 | md_rdev_clear(rdev); |
1da177e4 LT |
3441 | kfree(rdev); |
3442 | return ERR_PTR(err); | |
3443 | } | |
3444 | ||
3445 | /* | |
3446 | * Check a full RAID array for plausibility | |
3447 | */ | |
3448 | ||
f72ffdd6 | 3449 | static void analyze_sbs(struct mddev *mddev) |
1da177e4 LT |
3450 | { |
3451 | int i; | |
3cb03002 | 3452 | struct md_rdev *rdev, *freshest, *tmp; |
1da177e4 LT |
3453 | char b[BDEVNAME_SIZE]; |
3454 | ||
3455 | freshest = NULL; | |
dafb20fa | 3456 | rdev_for_each_safe(rdev, tmp, mddev) |
1da177e4 LT |
3457 | switch (super_types[mddev->major_version]. |
3458 | load_super(rdev, freshest, mddev->minor_version)) { | |
3459 | case 1: | |
3460 | freshest = rdev; | |
3461 | break; | |
3462 | case 0: | |
3463 | break; | |
3464 | default: | |
9d48739e | 3465 | pr_warn("md: fatal superblock inconsistency in %s -- removing from array\n", |
1da177e4 | 3466 | bdevname(rdev->bdev,b)); |
fb56dfef | 3467 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3468 | } |
3469 | ||
1da177e4 LT |
3470 | super_types[mddev->major_version]. |
3471 | validate_super(mddev, freshest); | |
3472 | ||
3473 | i = 0; | |
dafb20fa | 3474 | rdev_for_each_safe(rdev, tmp, mddev) { |
233fca36 N |
3475 | if (mddev->max_disks && |
3476 | (rdev->desc_nr >= mddev->max_disks || | |
3477 | i > mddev->max_disks)) { | |
9d48739e N |
3478 | pr_warn("md: %s: %s: only %d devices permitted\n", |
3479 | mdname(mddev), bdevname(rdev->bdev, b), | |
3480 | mddev->max_disks); | |
fb56dfef | 3481 | md_kick_rdev_from_array(rdev); |
de01dfad N |
3482 | continue; |
3483 | } | |
1aee41f6 | 3484 | if (rdev != freshest) { |
1da177e4 LT |
3485 | if (super_types[mddev->major_version]. |
3486 | validate_super(mddev, rdev)) { | |
9d48739e | 3487 | pr_warn("md: kicking non-fresh %s from array!\n", |
1da177e4 | 3488 | bdevname(rdev->bdev,b)); |
fb56dfef | 3489 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3490 | continue; |
3491 | } | |
1aee41f6 | 3492 | } |
1da177e4 LT |
3493 | if (mddev->level == LEVEL_MULTIPATH) { |
3494 | rdev->desc_nr = i++; | |
3495 | rdev->raid_disk = rdev->desc_nr; | |
b2d444d7 | 3496 | set_bit(In_sync, &rdev->flags); |
f2076e7d SL |
3497 | } else if (rdev->raid_disk >= |
3498 | (mddev->raid_disks - min(0, mddev->delta_disks)) && | |
3499 | !test_bit(Journal, &rdev->flags)) { | |
a778b73f N |
3500 | rdev->raid_disk = -1; |
3501 | clear_bit(In_sync, &rdev->flags); | |
1da177e4 LT |
3502 | } |
3503 | } | |
1da177e4 LT |
3504 | } |
3505 | ||
72e02075 N |
3506 | /* Read a fixed-point number. |
3507 | * Numbers in sysfs attributes should be in "standard" units where | |
3508 | * possible, so time should be in seconds. | |
f72ffdd6 | 3509 | * However we internally use a a much smaller unit such as |
72e02075 N |
3510 | * milliseconds or jiffies. |
3511 | * This function takes a decimal number with a possible fractional | |
3512 | * component, and produces an integer which is the result of | |
3513 | * multiplying that number by 10^'scale'. | |
3514 | * all without any floating-point arithmetic. | |
3515 | */ | |
3516 | int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale) | |
3517 | { | |
3518 | unsigned long result = 0; | |
3519 | long decimals = -1; | |
3520 | while (isdigit(*cp) || (*cp == '.' && decimals < 0)) { | |
3521 | if (*cp == '.') | |
3522 | decimals = 0; | |
3523 | else if (decimals < scale) { | |
3524 | unsigned int value; | |
3525 | value = *cp - '0'; | |
3526 | result = result * 10 + value; | |
3527 | if (decimals >= 0) | |
3528 | decimals++; | |
3529 | } | |
3530 | cp++; | |
3531 | } | |
3532 | if (*cp == '\n') | |
3533 | cp++; | |
3534 | if (*cp) | |
3535 | return -EINVAL; | |
3536 | if (decimals < 0) | |
3537 | decimals = 0; | |
3538 | while (decimals < scale) { | |
3539 | result *= 10; | |
3540 | decimals ++; | |
3541 | } | |
3542 | *res = result; | |
3543 | return 0; | |
3544 | } | |
3545 | ||
16f17b39 | 3546 | static ssize_t |
fd01b88c | 3547 | safe_delay_show(struct mddev *mddev, char *page) |
16f17b39 N |
3548 | { |
3549 | int msec = (mddev->safemode_delay*1000)/HZ; | |
3550 | return sprintf(page, "%d.%03d\n", msec/1000, msec%1000); | |
3551 | } | |
3552 | static ssize_t | |
fd01b88c | 3553 | safe_delay_store(struct mddev *mddev, const char *cbuf, size_t len) |
16f17b39 | 3554 | { |
16f17b39 | 3555 | unsigned long msec; |
97ce0a7f | 3556 | |
28c1b9fd | 3557 | if (mddev_is_clustered(mddev)) { |
9d48739e | 3558 | pr_warn("md: Safemode is disabled for clustered mode\n"); |
28c1b9fd GR |
3559 | return -EINVAL; |
3560 | } | |
3561 | ||
72e02075 | 3562 | if (strict_strtoul_scaled(cbuf, &msec, 3) < 0) |
16f17b39 | 3563 | return -EINVAL; |
16f17b39 N |
3564 | if (msec == 0) |
3565 | mddev->safemode_delay = 0; | |
3566 | else { | |
19052c0e | 3567 | unsigned long old_delay = mddev->safemode_delay; |
1b30e66f N |
3568 | unsigned long new_delay = (msec*HZ)/1000; |
3569 | ||
3570 | if (new_delay == 0) | |
3571 | new_delay = 1; | |
3572 | mddev->safemode_delay = new_delay; | |
3573 | if (new_delay < old_delay || old_delay == 0) | |
3574 | mod_timer(&mddev->safemode_timer, jiffies+1); | |
16f17b39 N |
3575 | } |
3576 | return len; | |
3577 | } | |
3578 | static struct md_sysfs_entry md_safe_delay = | |
80ca3a44 | 3579 | __ATTR(safe_mode_delay, S_IRUGO|S_IWUSR,safe_delay_show, safe_delay_store); |
16f17b39 | 3580 | |
eae1701f | 3581 | static ssize_t |
fd01b88c | 3582 | level_show(struct mddev *mddev, char *page) |
eae1701f | 3583 | { |
36d091f4 N |
3584 | struct md_personality *p; |
3585 | int ret; | |
3586 | spin_lock(&mddev->lock); | |
3587 | p = mddev->pers; | |
d9d166c2 | 3588 | if (p) |
36d091f4 | 3589 | ret = sprintf(page, "%s\n", p->name); |
d9d166c2 | 3590 | else if (mddev->clevel[0]) |
36d091f4 | 3591 | ret = sprintf(page, "%s\n", mddev->clevel); |
d9d166c2 | 3592 | else if (mddev->level != LEVEL_NONE) |
36d091f4 | 3593 | ret = sprintf(page, "%d\n", mddev->level); |
d9d166c2 | 3594 | else |
36d091f4 N |
3595 | ret = 0; |
3596 | spin_unlock(&mddev->lock); | |
3597 | return ret; | |
eae1701f N |
3598 | } |
3599 | ||
d9d166c2 | 3600 | static ssize_t |
fd01b88c | 3601 | level_store(struct mddev *mddev, const char *buf, size_t len) |
d9d166c2 | 3602 | { |
f2859af6 | 3603 | char clevel[16]; |
6791875e N |
3604 | ssize_t rv; |
3605 | size_t slen = len; | |
db721d32 | 3606 | struct md_personality *pers, *oldpers; |
f2859af6 | 3607 | long level; |
db721d32 | 3608 | void *priv, *oldpriv; |
3cb03002 | 3609 | struct md_rdev *rdev; |
245f46c2 | 3610 | |
6791875e N |
3611 | if (slen == 0 || slen >= sizeof(clevel)) |
3612 | return -EINVAL; | |
3613 | ||
3614 | rv = mddev_lock(mddev); | |
3615 | if (rv) | |
3616 | return rv; | |
3617 | ||
245f46c2 | 3618 | if (mddev->pers == NULL) { |
6791875e N |
3619 | strncpy(mddev->clevel, buf, slen); |
3620 | if (mddev->clevel[slen-1] == '\n') | |
3621 | slen--; | |
3622 | mddev->clevel[slen] = 0; | |
245f46c2 | 3623 | mddev->level = LEVEL_NONE; |
6791875e N |
3624 | rv = len; |
3625 | goto out_unlock; | |
245f46c2 | 3626 | } |
6791875e | 3627 | rv = -EROFS; |
bd8839e0 | 3628 | if (mddev->ro) |
6791875e | 3629 | goto out_unlock; |
245f46c2 N |
3630 | |
3631 | /* request to change the personality. Need to ensure: | |
3632 | * - array is not engaged in resync/recovery/reshape | |
3633 | * - old personality can be suspended | |
3634 | * - new personality will access other array. | |
3635 | */ | |
3636 | ||
6791875e | 3637 | rv = -EBUSY; |
bb4f1e9d | 3638 | if (mddev->sync_thread || |
f851b60d | 3639 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
bb4f1e9d N |
3640 | mddev->reshape_position != MaxSector || |
3641 | mddev->sysfs_active) | |
6791875e | 3642 | goto out_unlock; |
245f46c2 | 3643 | |
6791875e | 3644 | rv = -EINVAL; |
245f46c2 | 3645 | if (!mddev->pers->quiesce) { |
9d48739e N |
3646 | pr_warn("md: %s: %s does not support online personality change\n", |
3647 | mdname(mddev), mddev->pers->name); | |
6791875e | 3648 | goto out_unlock; |
245f46c2 N |
3649 | } |
3650 | ||
3651 | /* Now find the new personality */ | |
6791875e N |
3652 | strncpy(clevel, buf, slen); |
3653 | if (clevel[slen-1] == '\n') | |
3654 | slen--; | |
3655 | clevel[slen] = 0; | |
b29bebd6 | 3656 | if (kstrtol(clevel, 10, &level)) |
f2859af6 | 3657 | level = LEVEL_NONE; |
245f46c2 | 3658 | |
f2859af6 DW |
3659 | if (request_module("md-%s", clevel) != 0) |
3660 | request_module("md-level-%s", clevel); | |
245f46c2 | 3661 | spin_lock(&pers_lock); |
f2859af6 | 3662 | pers = find_pers(level, clevel); |
245f46c2 N |
3663 | if (!pers || !try_module_get(pers->owner)) { |
3664 | spin_unlock(&pers_lock); | |
9d48739e | 3665 | pr_warn("md: personality %s not loaded\n", clevel); |
6791875e N |
3666 | rv = -EINVAL; |
3667 | goto out_unlock; | |
245f46c2 N |
3668 | } |
3669 | spin_unlock(&pers_lock); | |
3670 | ||
3671 | if (pers == mddev->pers) { | |
3672 | /* Nothing to do! */ | |
3673 | module_put(pers->owner); | |
6791875e N |
3674 | rv = len; |
3675 | goto out_unlock; | |
245f46c2 N |
3676 | } |
3677 | if (!pers->takeover) { | |
3678 | module_put(pers->owner); | |
9d48739e N |
3679 | pr_warn("md: %s: %s does not support personality takeover\n", |
3680 | mdname(mddev), clevel); | |
6791875e N |
3681 | rv = -EINVAL; |
3682 | goto out_unlock; | |
245f46c2 N |
3683 | } |
3684 | ||
dafb20fa | 3685 | rdev_for_each(rdev, mddev) |
e93f68a1 N |
3686 | rdev->new_raid_disk = rdev->raid_disk; |
3687 | ||
245f46c2 N |
3688 | /* ->takeover must set new_* and/or delta_disks |
3689 | * if it succeeds, and may set them when it fails. | |
3690 | */ | |
3691 | priv = pers->takeover(mddev); | |
3692 | if (IS_ERR(priv)) { | |
3693 | mddev->new_level = mddev->level; | |
3694 | mddev->new_layout = mddev->layout; | |
664e7c41 | 3695 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
245f46c2 N |
3696 | mddev->raid_disks -= mddev->delta_disks; |
3697 | mddev->delta_disks = 0; | |
2c810cdd | 3698 | mddev->reshape_backwards = 0; |
245f46c2 | 3699 | module_put(pers->owner); |
9d48739e N |
3700 | pr_warn("md: %s: %s would not accept array\n", |
3701 | mdname(mddev), clevel); | |
6791875e N |
3702 | rv = PTR_ERR(priv); |
3703 | goto out_unlock; | |
245f46c2 N |
3704 | } |
3705 | ||
3706 | /* Looks like we have a winner */ | |
3707 | mddev_suspend(mddev); | |
5aa61f42 | 3708 | mddev_detach(mddev); |
36d091f4 N |
3709 | |
3710 | spin_lock(&mddev->lock); | |
db721d32 N |
3711 | oldpers = mddev->pers; |
3712 | oldpriv = mddev->private; | |
3713 | mddev->pers = pers; | |
3714 | mddev->private = priv; | |
3715 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); | |
3716 | mddev->level = mddev->new_level; | |
3717 | mddev->layout = mddev->new_layout; | |
3718 | mddev->chunk_sectors = mddev->new_chunk_sectors; | |
3719 | mddev->delta_disks = 0; | |
3720 | mddev->reshape_backwards = 0; | |
3721 | mddev->degraded = 0; | |
36d091f4 | 3722 | spin_unlock(&mddev->lock); |
db721d32 N |
3723 | |
3724 | if (oldpers->sync_request == NULL && | |
3725 | mddev->external) { | |
3726 | /* We are converting from a no-redundancy array | |
3727 | * to a redundancy array and metadata is managed | |
3728 | * externally so we need to be sure that writes | |
3729 | * won't block due to a need to transition | |
3730 | * clean->dirty | |
3731 | * until external management is started. | |
3732 | */ | |
3733 | mddev->in_sync = 0; | |
3734 | mddev->safemode_delay = 0; | |
3735 | mddev->safemode = 0; | |
3736 | } | |
f72ffdd6 | 3737 | |
db721d32 N |
3738 | oldpers->free(mddev, oldpriv); |
3739 | ||
3740 | if (oldpers->sync_request == NULL && | |
a64c876f N |
3741 | pers->sync_request != NULL) { |
3742 | /* need to add the md_redundancy_group */ | |
3743 | if (sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
3744 | pr_warn("md: cannot register extra attributes for %s\n", |
3745 | mdname(mddev)); | |
388975cc | 3746 | mddev->sysfs_action = sysfs_get_dirent(mddev->kobj.sd, "sync_action"); |
f72ffdd6 | 3747 | } |
db721d32 | 3748 | if (oldpers->sync_request != NULL && |
a64c876f N |
3749 | pers->sync_request == NULL) { |
3750 | /* need to remove the md_redundancy_group */ | |
3751 | if (mddev->to_remove == NULL) | |
3752 | mddev->to_remove = &md_redundancy_group; | |
3753 | } | |
3754 | ||
4cb9da7d AO |
3755 | module_put(oldpers->owner); |
3756 | ||
dafb20fa | 3757 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
3758 | if (rdev->raid_disk < 0) |
3759 | continue; | |
bf2cb0da | 3760 | if (rdev->new_raid_disk >= mddev->raid_disks) |
e93f68a1 N |
3761 | rdev->new_raid_disk = -1; |
3762 | if (rdev->new_raid_disk == rdev->raid_disk) | |
3763 | continue; | |
36fad858 | 3764 | sysfs_unlink_rdev(mddev, rdev); |
e93f68a1 | 3765 | } |
dafb20fa | 3766 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
3767 | if (rdev->raid_disk < 0) |
3768 | continue; | |
3769 | if (rdev->new_raid_disk == rdev->raid_disk) | |
3770 | continue; | |
3771 | rdev->raid_disk = rdev->new_raid_disk; | |
3772 | if (rdev->raid_disk < 0) | |
3a981b03 | 3773 | clear_bit(In_sync, &rdev->flags); |
e93f68a1 | 3774 | else { |
36fad858 | 3775 | if (sysfs_link_rdev(mddev, rdev)) |
9d48739e N |
3776 | pr_warn("md: cannot register rd%d for %s after level change\n", |
3777 | rdev->raid_disk, mdname(mddev)); | |
3a981b03 | 3778 | } |
e93f68a1 N |
3779 | } |
3780 | ||
db721d32 | 3781 | if (pers->sync_request == NULL) { |
9af204cf TM |
3782 | /* this is now an array without redundancy, so |
3783 | * it must always be in_sync | |
3784 | */ | |
3785 | mddev->in_sync = 1; | |
3786 | del_timer_sync(&mddev->safemode_timer); | |
3787 | } | |
02e5f5c0 | 3788 | blk_set_stacking_limits(&mddev->queue->limits); |
245f46c2 | 3789 | pers->run(mddev); |
2953079c | 3790 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
47525e59 | 3791 | mddev_resume(mddev); |
830778a1 N |
3792 | if (!mddev->thread) |
3793 | md_update_sb(mddev, 1); | |
5cac7861 | 3794 | sysfs_notify(&mddev->kobj, NULL, "level"); |
bb7f8d22 | 3795 | md_new_event(mddev); |
6791875e N |
3796 | rv = len; |
3797 | out_unlock: | |
3798 | mddev_unlock(mddev); | |
d9d166c2 N |
3799 | return rv; |
3800 | } | |
3801 | ||
3802 | static struct md_sysfs_entry md_level = | |
80ca3a44 | 3803 | __ATTR(level, S_IRUGO|S_IWUSR, level_show, level_store); |
eae1701f | 3804 | |
d4dbd025 | 3805 | static ssize_t |
fd01b88c | 3806 | layout_show(struct mddev *mddev, char *page) |
d4dbd025 N |
3807 | { |
3808 | /* just a number, not meaningful for all levels */ | |
08a02ecd N |
3809 | if (mddev->reshape_position != MaxSector && |
3810 | mddev->layout != mddev->new_layout) | |
3811 | return sprintf(page, "%d (%d)\n", | |
3812 | mddev->new_layout, mddev->layout); | |
d4dbd025 N |
3813 | return sprintf(page, "%d\n", mddev->layout); |
3814 | } | |
3815 | ||
3816 | static ssize_t | |
fd01b88c | 3817 | layout_store(struct mddev *mddev, const char *buf, size_t len) |
d4dbd025 | 3818 | { |
4c9309c0 | 3819 | unsigned int n; |
6791875e | 3820 | int err; |
d4dbd025 | 3821 | |
4c9309c0 AD |
3822 | err = kstrtouint(buf, 10, &n); |
3823 | if (err < 0) | |
3824 | return err; | |
6791875e N |
3825 | err = mddev_lock(mddev); |
3826 | if (err) | |
3827 | return err; | |
d4dbd025 | 3828 | |
b3546035 | 3829 | if (mddev->pers) { |
50ac168a | 3830 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
3831 | err = -EBUSY; |
3832 | else if (mddev->ro) | |
3833 | err = -EROFS; | |
3834 | else { | |
3835 | mddev->new_layout = n; | |
3836 | err = mddev->pers->check_reshape(mddev); | |
3837 | if (err) | |
3838 | mddev->new_layout = mddev->layout; | |
597a711b | 3839 | } |
b3546035 | 3840 | } else { |
08a02ecd | 3841 | mddev->new_layout = n; |
b3546035 N |
3842 | if (mddev->reshape_position == MaxSector) |
3843 | mddev->layout = n; | |
3844 | } | |
6791875e N |
3845 | mddev_unlock(mddev); |
3846 | return err ?: len; | |
d4dbd025 N |
3847 | } |
3848 | static struct md_sysfs_entry md_layout = | |
80ca3a44 | 3849 | __ATTR(layout, S_IRUGO|S_IWUSR, layout_show, layout_store); |
d4dbd025 | 3850 | |
eae1701f | 3851 | static ssize_t |
fd01b88c | 3852 | raid_disks_show(struct mddev *mddev, char *page) |
eae1701f | 3853 | { |
bb636547 N |
3854 | if (mddev->raid_disks == 0) |
3855 | return 0; | |
08a02ecd N |
3856 | if (mddev->reshape_position != MaxSector && |
3857 | mddev->delta_disks != 0) | |
3858 | return sprintf(page, "%d (%d)\n", mddev->raid_disks, | |
3859 | mddev->raid_disks - mddev->delta_disks); | |
eae1701f N |
3860 | return sprintf(page, "%d\n", mddev->raid_disks); |
3861 | } | |
3862 | ||
fd01b88c | 3863 | static int update_raid_disks(struct mddev *mddev, int raid_disks); |
da943b99 N |
3864 | |
3865 | static ssize_t | |
fd01b88c | 3866 | raid_disks_store(struct mddev *mddev, const char *buf, size_t len) |
da943b99 | 3867 | { |
4c9309c0 | 3868 | unsigned int n; |
6791875e | 3869 | int err; |
da943b99 | 3870 | |
4c9309c0 AD |
3871 | err = kstrtouint(buf, 10, &n); |
3872 | if (err < 0) | |
3873 | return err; | |
da943b99 | 3874 | |
6791875e N |
3875 | err = mddev_lock(mddev); |
3876 | if (err) | |
3877 | return err; | |
da943b99 | 3878 | if (mddev->pers) |
6791875e | 3879 | err = update_raid_disks(mddev, n); |
08a02ecd | 3880 | else if (mddev->reshape_position != MaxSector) { |
c6563a8c | 3881 | struct md_rdev *rdev; |
08a02ecd | 3882 | int olddisks = mddev->raid_disks - mddev->delta_disks; |
c6563a8c | 3883 | |
6791875e | 3884 | err = -EINVAL; |
c6563a8c N |
3885 | rdev_for_each(rdev, mddev) { |
3886 | if (olddisks < n && | |
3887 | rdev->data_offset < rdev->new_data_offset) | |
6791875e | 3888 | goto out_unlock; |
c6563a8c N |
3889 | if (olddisks > n && |
3890 | rdev->data_offset > rdev->new_data_offset) | |
6791875e | 3891 | goto out_unlock; |
c6563a8c | 3892 | } |
6791875e | 3893 | err = 0; |
08a02ecd N |
3894 | mddev->delta_disks = n - olddisks; |
3895 | mddev->raid_disks = n; | |
2c810cdd | 3896 | mddev->reshape_backwards = (mddev->delta_disks < 0); |
08a02ecd | 3897 | } else |
da943b99 | 3898 | mddev->raid_disks = n; |
6791875e N |
3899 | out_unlock: |
3900 | mddev_unlock(mddev); | |
3901 | return err ? err : len; | |
da943b99 N |
3902 | } |
3903 | static struct md_sysfs_entry md_raid_disks = | |
80ca3a44 | 3904 | __ATTR(raid_disks, S_IRUGO|S_IWUSR, raid_disks_show, raid_disks_store); |
eae1701f | 3905 | |
3b34380a | 3906 | static ssize_t |
fd01b88c | 3907 | chunk_size_show(struct mddev *mddev, char *page) |
3b34380a | 3908 | { |
08a02ecd | 3909 | if (mddev->reshape_position != MaxSector && |
664e7c41 AN |
3910 | mddev->chunk_sectors != mddev->new_chunk_sectors) |
3911 | return sprintf(page, "%d (%d)\n", | |
3912 | mddev->new_chunk_sectors << 9, | |
9d8f0363 AN |
3913 | mddev->chunk_sectors << 9); |
3914 | return sprintf(page, "%d\n", mddev->chunk_sectors << 9); | |
3b34380a N |
3915 | } |
3916 | ||
3917 | static ssize_t | |
fd01b88c | 3918 | chunk_size_store(struct mddev *mddev, const char *buf, size_t len) |
3b34380a | 3919 | { |
4c9309c0 | 3920 | unsigned long n; |
6791875e | 3921 | int err; |
3b34380a | 3922 | |
4c9309c0 AD |
3923 | err = kstrtoul(buf, 10, &n); |
3924 | if (err < 0) | |
3925 | return err; | |
3b34380a | 3926 | |
6791875e N |
3927 | err = mddev_lock(mddev); |
3928 | if (err) | |
3929 | return err; | |
b3546035 | 3930 | if (mddev->pers) { |
50ac168a | 3931 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
3932 | err = -EBUSY; |
3933 | else if (mddev->ro) | |
3934 | err = -EROFS; | |
3935 | else { | |
3936 | mddev->new_chunk_sectors = n >> 9; | |
3937 | err = mddev->pers->check_reshape(mddev); | |
3938 | if (err) | |
3939 | mddev->new_chunk_sectors = mddev->chunk_sectors; | |
597a711b | 3940 | } |
b3546035 | 3941 | } else { |
664e7c41 | 3942 | mddev->new_chunk_sectors = n >> 9; |
b3546035 | 3943 | if (mddev->reshape_position == MaxSector) |
9d8f0363 | 3944 | mddev->chunk_sectors = n >> 9; |
b3546035 | 3945 | } |
6791875e N |
3946 | mddev_unlock(mddev); |
3947 | return err ?: len; | |
3b34380a N |
3948 | } |
3949 | static struct md_sysfs_entry md_chunk_size = | |
80ca3a44 | 3950 | __ATTR(chunk_size, S_IRUGO|S_IWUSR, chunk_size_show, chunk_size_store); |
3b34380a | 3951 | |
a94213b1 | 3952 | static ssize_t |
fd01b88c | 3953 | resync_start_show(struct mddev *mddev, char *page) |
a94213b1 | 3954 | { |
d1a7c503 N |
3955 | if (mddev->recovery_cp == MaxSector) |
3956 | return sprintf(page, "none\n"); | |
a94213b1 N |
3957 | return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp); |
3958 | } | |
3959 | ||
3960 | static ssize_t | |
fd01b88c | 3961 | resync_start_store(struct mddev *mddev, const char *buf, size_t len) |
a94213b1 | 3962 | { |
4c9309c0 | 3963 | unsigned long long n; |
6791875e | 3964 | int err; |
4c9309c0 AD |
3965 | |
3966 | if (cmd_match(buf, "none")) | |
3967 | n = MaxSector; | |
3968 | else { | |
3969 | err = kstrtoull(buf, 10, &n); | |
3970 | if (err < 0) | |
3971 | return err; | |
3972 | if (n != (sector_t)n) | |
3973 | return -EINVAL; | |
3974 | } | |
a94213b1 | 3975 | |
6791875e N |
3976 | err = mddev_lock(mddev); |
3977 | if (err) | |
3978 | return err; | |
b098636c | 3979 | if (mddev->pers && !test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) |
6791875e | 3980 | err = -EBUSY; |
a94213b1 | 3981 | |
6791875e N |
3982 | if (!err) { |
3983 | mddev->recovery_cp = n; | |
3984 | if (mddev->pers) | |
2953079c | 3985 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
6791875e N |
3986 | } |
3987 | mddev_unlock(mddev); | |
3988 | return err ?: len; | |
a94213b1 N |
3989 | } |
3990 | static struct md_sysfs_entry md_resync_start = | |
750f199e N |
3991 | __ATTR_PREALLOC(resync_start, S_IRUGO|S_IWUSR, |
3992 | resync_start_show, resync_start_store); | |
a94213b1 | 3993 | |
9e653b63 N |
3994 | /* |
3995 | * The array state can be: | |
3996 | * | |
3997 | * clear | |
3998 | * No devices, no size, no level | |
3999 | * Equivalent to STOP_ARRAY ioctl | |
4000 | * inactive | |
4001 | * May have some settings, but array is not active | |
4002 | * all IO results in error | |
4003 | * When written, doesn't tear down array, but just stops it | |
4004 | * suspended (not supported yet) | |
4005 | * All IO requests will block. The array can be reconfigured. | |
910d8cb3 | 4006 | * Writing this, if accepted, will block until array is quiescent |
9e653b63 N |
4007 | * readonly |
4008 | * no resync can happen. no superblocks get written. | |
4009 | * write requests fail | |
4010 | * read-auto | |
4011 | * like readonly, but behaves like 'clean' on a write request. | |
4012 | * | |
4013 | * clean - no pending writes, but otherwise active. | |
4014 | * When written to inactive array, starts without resync | |
4015 | * If a write request arrives then | |
4016 | * if metadata is known, mark 'dirty' and switch to 'active'. | |
4017 | * if not known, block and switch to write-pending | |
4018 | * If written to an active array that has pending writes, then fails. | |
4019 | * active | |
4020 | * fully active: IO and resync can be happening. | |
4021 | * When written to inactive array, starts with resync | |
4022 | * | |
4023 | * write-pending | |
4024 | * clean, but writes are blocked waiting for 'active' to be written. | |
4025 | * | |
4026 | * active-idle | |
4027 | * like active, but no writes have been seen for a while (100msec). | |
4028 | * | |
4029 | */ | |
4030 | enum array_state { clear, inactive, suspended, readonly, read_auto, clean, active, | |
4031 | write_pending, active_idle, bad_word}; | |
05381954 | 4032 | static char *array_states[] = { |
9e653b63 N |
4033 | "clear", "inactive", "suspended", "readonly", "read-auto", "clean", "active", |
4034 | "write-pending", "active-idle", NULL }; | |
4035 | ||
4036 | static int match_word(const char *word, char **list) | |
4037 | { | |
4038 | int n; | |
4039 | for (n=0; list[n]; n++) | |
4040 | if (cmd_match(word, list[n])) | |
4041 | break; | |
4042 | return n; | |
4043 | } | |
4044 | ||
4045 | static ssize_t | |
fd01b88c | 4046 | array_state_show(struct mddev *mddev, char *page) |
9e653b63 N |
4047 | { |
4048 | enum array_state st = inactive; | |
4049 | ||
4050 | if (mddev->pers) | |
4051 | switch(mddev->ro) { | |
4052 | case 1: | |
4053 | st = readonly; | |
4054 | break; | |
4055 | case 2: | |
4056 | st = read_auto; | |
4057 | break; | |
4058 | case 0: | |
55cc39f3 | 4059 | spin_lock(&mddev->lock); |
2953079c | 4060 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
e691063a | 4061 | st = write_pending; |
16f88949 TM |
4062 | else if (mddev->in_sync) |
4063 | st = clean; | |
9e653b63 N |
4064 | else if (mddev->safemode) |
4065 | st = active_idle; | |
4066 | else | |
4067 | st = active; | |
55cc39f3 | 4068 | spin_unlock(&mddev->lock); |
9e653b63 N |
4069 | } |
4070 | else { | |
4071 | if (list_empty(&mddev->disks) && | |
4072 | mddev->raid_disks == 0 && | |
58c0fed4 | 4073 | mddev->dev_sectors == 0) |
9e653b63 N |
4074 | st = clear; |
4075 | else | |
4076 | st = inactive; | |
4077 | } | |
4078 | return sprintf(page, "%s\n", array_states[st]); | |
4079 | } | |
4080 | ||
f72ffdd6 N |
4081 | static int do_md_stop(struct mddev *mddev, int ro, struct block_device *bdev); |
4082 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev); | |
4083 | static int do_md_run(struct mddev *mddev); | |
fd01b88c | 4084 | static int restart_array(struct mddev *mddev); |
9e653b63 N |
4085 | |
4086 | static ssize_t | |
fd01b88c | 4087 | array_state_store(struct mddev *mddev, const char *buf, size_t len) |
9e653b63 | 4088 | { |
6497709b | 4089 | int err = 0; |
9e653b63 | 4090 | enum array_state st = match_word(buf, array_states); |
6791875e N |
4091 | |
4092 | if (mddev->pers && (st == active || st == clean) && mddev->ro != 1) { | |
4093 | /* don't take reconfig_mutex when toggling between | |
4094 | * clean and active | |
4095 | */ | |
4096 | spin_lock(&mddev->lock); | |
4097 | if (st == active) { | |
4098 | restart_array(mddev); | |
2953079c | 4099 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
91a6c4ad | 4100 | md_wakeup_thread(mddev->thread); |
6791875e | 4101 | wake_up(&mddev->sb_wait); |
6791875e N |
4102 | } else /* st == clean */ { |
4103 | restart_array(mddev); | |
6497709b | 4104 | if (!set_in_sync(mddev)) |
6791875e N |
4105 | err = -EBUSY; |
4106 | } | |
573275b5 TM |
4107 | if (!err) |
4108 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
6791875e | 4109 | spin_unlock(&mddev->lock); |
c008f1d3 | 4110 | return err ?: len; |
6791875e N |
4111 | } |
4112 | err = mddev_lock(mddev); | |
4113 | if (err) | |
4114 | return err; | |
4115 | err = -EINVAL; | |
9e653b63 N |
4116 | switch(st) { |
4117 | case bad_word: | |
4118 | break; | |
4119 | case clear: | |
4120 | /* stopping an active array */ | |
a05b7ea0 | 4121 | err = do_md_stop(mddev, 0, NULL); |
9e653b63 N |
4122 | break; |
4123 | case inactive: | |
4124 | /* stopping an active array */ | |
90cf195d | 4125 | if (mddev->pers) |
a05b7ea0 | 4126 | err = do_md_stop(mddev, 2, NULL); |
90cf195d | 4127 | else |
e691063a | 4128 | err = 0; /* already inactive */ |
9e653b63 N |
4129 | break; |
4130 | case suspended: | |
4131 | break; /* not supported yet */ | |
4132 | case readonly: | |
4133 | if (mddev->pers) | |
a05b7ea0 | 4134 | err = md_set_readonly(mddev, NULL); |
9e653b63 N |
4135 | else { |
4136 | mddev->ro = 1; | |
648b629e | 4137 | set_disk_ro(mddev->gendisk, 1); |
9e653b63 N |
4138 | err = do_md_run(mddev); |
4139 | } | |
4140 | break; | |
4141 | case read_auto: | |
9e653b63 | 4142 | if (mddev->pers) { |
80268ee9 | 4143 | if (mddev->ro == 0) |
a05b7ea0 | 4144 | err = md_set_readonly(mddev, NULL); |
80268ee9 | 4145 | else if (mddev->ro == 1) |
648b629e N |
4146 | err = restart_array(mddev); |
4147 | if (err == 0) { | |
4148 | mddev->ro = 2; | |
4149 | set_disk_ro(mddev->gendisk, 0); | |
4150 | } | |
9e653b63 N |
4151 | } else { |
4152 | mddev->ro = 2; | |
4153 | err = do_md_run(mddev); | |
4154 | } | |
4155 | break; | |
4156 | case clean: | |
4157 | if (mddev->pers) { | |
339421de SL |
4158 | err = restart_array(mddev); |
4159 | if (err) | |
4160 | break; | |
85572d7c | 4161 | spin_lock(&mddev->lock); |
6497709b | 4162 | if (!set_in_sync(mddev)) |
e691063a | 4163 | err = -EBUSY; |
85572d7c | 4164 | spin_unlock(&mddev->lock); |
5bf29597 N |
4165 | } else |
4166 | err = -EINVAL; | |
9e653b63 N |
4167 | break; |
4168 | case active: | |
4169 | if (mddev->pers) { | |
339421de SL |
4170 | err = restart_array(mddev); |
4171 | if (err) | |
4172 | break; | |
2953079c | 4173 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
9e653b63 N |
4174 | wake_up(&mddev->sb_wait); |
4175 | err = 0; | |
4176 | } else { | |
4177 | mddev->ro = 0; | |
648b629e | 4178 | set_disk_ro(mddev->gendisk, 0); |
9e653b63 N |
4179 | err = do_md_run(mddev); |
4180 | } | |
4181 | break; | |
4182 | case write_pending: | |
4183 | case active_idle: | |
4184 | /* these cannot be set */ | |
4185 | break; | |
4186 | } | |
6791875e N |
4187 | |
4188 | if (!err) { | |
1d23f178 N |
4189 | if (mddev->hold_active == UNTIL_IOCTL) |
4190 | mddev->hold_active = 0; | |
00bcb4ac | 4191 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 4192 | } |
6791875e N |
4193 | mddev_unlock(mddev); |
4194 | return err ?: len; | |
9e653b63 | 4195 | } |
80ca3a44 | 4196 | static struct md_sysfs_entry md_array_state = |
750f199e | 4197 | __ATTR_PREALLOC(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store); |
9e653b63 | 4198 | |
1e50915f | 4199 | static ssize_t |
fd01b88c | 4200 | max_corrected_read_errors_show(struct mddev *mddev, char *page) { |
1e50915f RB |
4201 | return sprintf(page, "%d\n", |
4202 | atomic_read(&mddev->max_corr_read_errors)); | |
4203 | } | |
4204 | ||
4205 | static ssize_t | |
fd01b88c | 4206 | max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len) |
1e50915f | 4207 | { |
4c9309c0 AD |
4208 | unsigned int n; |
4209 | int rv; | |
1e50915f | 4210 | |
4c9309c0 AD |
4211 | rv = kstrtouint(buf, 10, &n); |
4212 | if (rv < 0) | |
4213 | return rv; | |
4214 | atomic_set(&mddev->max_corr_read_errors, n); | |
4215 | return len; | |
1e50915f RB |
4216 | } |
4217 | ||
4218 | static struct md_sysfs_entry max_corr_read_errors = | |
4219 | __ATTR(max_read_errors, S_IRUGO|S_IWUSR, max_corrected_read_errors_show, | |
4220 | max_corrected_read_errors_store); | |
4221 | ||
6d7ff738 | 4222 | static ssize_t |
fd01b88c | 4223 | null_show(struct mddev *mddev, char *page) |
6d7ff738 N |
4224 | { |
4225 | return -EINVAL; | |
4226 | } | |
4227 | ||
4228 | static ssize_t | |
fd01b88c | 4229 | new_dev_store(struct mddev *mddev, const char *buf, size_t len) |
6d7ff738 N |
4230 | { |
4231 | /* buf must be %d:%d\n? giving major and minor numbers */ | |
4232 | /* The new device is added to the array. | |
4233 | * If the array has a persistent superblock, we read the | |
4234 | * superblock to initialise info and check validity. | |
4235 | * Otherwise, only checking done is that in bind_rdev_to_array, | |
4236 | * which mainly checks size. | |
4237 | */ | |
4238 | char *e; | |
4239 | int major = simple_strtoul(buf, &e, 10); | |
4240 | int minor; | |
4241 | dev_t dev; | |
3cb03002 | 4242 | struct md_rdev *rdev; |
6d7ff738 N |
4243 | int err; |
4244 | ||
4245 | if (!*buf || *e != ':' || !e[1] || e[1] == '\n') | |
4246 | return -EINVAL; | |
4247 | minor = simple_strtoul(e+1, &e, 10); | |
4248 | if (*e && *e != '\n') | |
4249 | return -EINVAL; | |
4250 | dev = MKDEV(major, minor); | |
4251 | if (major != MAJOR(dev) || | |
4252 | minor != MINOR(dev)) | |
4253 | return -EOVERFLOW; | |
4254 | ||
6791875e N |
4255 | flush_workqueue(md_misc_wq); |
4256 | ||
4257 | err = mddev_lock(mddev); | |
4258 | if (err) | |
4259 | return err; | |
6d7ff738 N |
4260 | if (mddev->persistent) { |
4261 | rdev = md_import_device(dev, mddev->major_version, | |
4262 | mddev->minor_version); | |
4263 | if (!IS_ERR(rdev) && !list_empty(&mddev->disks)) { | |
3cb03002 N |
4264 | struct md_rdev *rdev0 |
4265 | = list_entry(mddev->disks.next, | |
4266 | struct md_rdev, same_set); | |
6d7ff738 N |
4267 | err = super_types[mddev->major_version] |
4268 | .load_super(rdev, rdev0, mddev->minor_version); | |
4269 | if (err < 0) | |
4270 | goto out; | |
4271 | } | |
c5d79adb N |
4272 | } else if (mddev->external) |
4273 | rdev = md_import_device(dev, -2, -1); | |
4274 | else | |
6d7ff738 N |
4275 | rdev = md_import_device(dev, -1, -1); |
4276 | ||
9a8c0fa8 N |
4277 | if (IS_ERR(rdev)) { |
4278 | mddev_unlock(mddev); | |
6d7ff738 | 4279 | return PTR_ERR(rdev); |
9a8c0fa8 | 4280 | } |
6d7ff738 N |
4281 | err = bind_rdev_to_array(rdev, mddev); |
4282 | out: | |
4283 | if (err) | |
4284 | export_rdev(rdev); | |
6791875e | 4285 | mddev_unlock(mddev); |
6d7ff738 N |
4286 | return err ? err : len; |
4287 | } | |
4288 | ||
4289 | static struct md_sysfs_entry md_new_device = | |
80ca3a44 | 4290 | __ATTR(new_dev, S_IWUSR, null_show, new_dev_store); |
3b34380a | 4291 | |
9b1d1dac | 4292 | static ssize_t |
fd01b88c | 4293 | bitmap_store(struct mddev *mddev, const char *buf, size_t len) |
9b1d1dac PC |
4294 | { |
4295 | char *end; | |
4296 | unsigned long chunk, end_chunk; | |
6791875e | 4297 | int err; |
9b1d1dac | 4298 | |
6791875e N |
4299 | err = mddev_lock(mddev); |
4300 | if (err) | |
4301 | return err; | |
9b1d1dac PC |
4302 | if (!mddev->bitmap) |
4303 | goto out; | |
4304 | /* buf should be <chunk> <chunk> ... or <chunk>-<chunk> ... (range) */ | |
4305 | while (*buf) { | |
4306 | chunk = end_chunk = simple_strtoul(buf, &end, 0); | |
4307 | if (buf == end) break; | |
4308 | if (*end == '-') { /* range */ | |
4309 | buf = end + 1; | |
4310 | end_chunk = simple_strtoul(buf, &end, 0); | |
4311 | if (buf == end) break; | |
4312 | } | |
4313 | if (*end && !isspace(*end)) break; | |
4314 | bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk); | |
e7d2860b | 4315 | buf = skip_spaces(end); |
9b1d1dac PC |
4316 | } |
4317 | bitmap_unplug(mddev->bitmap); /* flush the bits to disk */ | |
4318 | out: | |
6791875e | 4319 | mddev_unlock(mddev); |
9b1d1dac PC |
4320 | return len; |
4321 | } | |
4322 | ||
4323 | static struct md_sysfs_entry md_bitmap = | |
4324 | __ATTR(bitmap_set_bits, S_IWUSR, null_show, bitmap_store); | |
4325 | ||
a35b0d69 | 4326 | static ssize_t |
fd01b88c | 4327 | size_show(struct mddev *mddev, char *page) |
a35b0d69 | 4328 | { |
58c0fed4 AN |
4329 | return sprintf(page, "%llu\n", |
4330 | (unsigned long long)mddev->dev_sectors / 2); | |
a35b0d69 N |
4331 | } |
4332 | ||
fd01b88c | 4333 | static int update_size(struct mddev *mddev, sector_t num_sectors); |
a35b0d69 N |
4334 | |
4335 | static ssize_t | |
fd01b88c | 4336 | size_store(struct mddev *mddev, const char *buf, size_t len) |
a35b0d69 N |
4337 | { |
4338 | /* If array is inactive, we can reduce the component size, but | |
4339 | * not increase it (except from 0). | |
4340 | * If array is active, we can try an on-line resize | |
4341 | */ | |
b522adcd DW |
4342 | sector_t sectors; |
4343 | int err = strict_blocks_to_sectors(buf, §ors); | |
a35b0d69 | 4344 | |
58c0fed4 AN |
4345 | if (err < 0) |
4346 | return err; | |
6791875e N |
4347 | err = mddev_lock(mddev); |
4348 | if (err) | |
4349 | return err; | |
a35b0d69 | 4350 | if (mddev->pers) { |
58c0fed4 | 4351 | err = update_size(mddev, sectors); |
4ba1e788 XN |
4352 | if (err == 0) |
4353 | md_update_sb(mddev, 1); | |
a35b0d69 | 4354 | } else { |
58c0fed4 AN |
4355 | if (mddev->dev_sectors == 0 || |
4356 | mddev->dev_sectors > sectors) | |
4357 | mddev->dev_sectors = sectors; | |
a35b0d69 N |
4358 | else |
4359 | err = -ENOSPC; | |
4360 | } | |
6791875e | 4361 | mddev_unlock(mddev); |
a35b0d69 N |
4362 | return err ? err : len; |
4363 | } | |
4364 | ||
4365 | static struct md_sysfs_entry md_size = | |
80ca3a44 | 4366 | __ATTR(component_size, S_IRUGO|S_IWUSR, size_show, size_store); |
a35b0d69 | 4367 | |
83f0d77a | 4368 | /* Metadata version. |
e691063a N |
4369 | * This is one of |
4370 | * 'none' for arrays with no metadata (good luck...) | |
4371 | * 'external' for arrays with externally managed metadata, | |
8bb93aac N |
4372 | * or N.M for internally known formats |
4373 | */ | |
4374 | static ssize_t | |
fd01b88c | 4375 | metadata_show(struct mddev *mddev, char *page) |
8bb93aac N |
4376 | { |
4377 | if (mddev->persistent) | |
4378 | return sprintf(page, "%d.%d\n", | |
4379 | mddev->major_version, mddev->minor_version); | |
e691063a N |
4380 | else if (mddev->external) |
4381 | return sprintf(page, "external:%s\n", mddev->metadata_type); | |
8bb93aac N |
4382 | else |
4383 | return sprintf(page, "none\n"); | |
4384 | } | |
4385 | ||
4386 | static ssize_t | |
fd01b88c | 4387 | metadata_store(struct mddev *mddev, const char *buf, size_t len) |
8bb93aac N |
4388 | { |
4389 | int major, minor; | |
4390 | char *e; | |
6791875e | 4391 | int err; |
ea43ddd8 N |
4392 | /* Changing the details of 'external' metadata is |
4393 | * always permitted. Otherwise there must be | |
4394 | * no devices attached to the array. | |
4395 | */ | |
6791875e N |
4396 | |
4397 | err = mddev_lock(mddev); | |
4398 | if (err) | |
4399 | return err; | |
4400 | err = -EBUSY; | |
ea43ddd8 N |
4401 | if (mddev->external && strncmp(buf, "external:", 9) == 0) |
4402 | ; | |
4403 | else if (!list_empty(&mddev->disks)) | |
6791875e | 4404 | goto out_unlock; |
8bb93aac | 4405 | |
6791875e | 4406 | err = 0; |
8bb93aac N |
4407 | if (cmd_match(buf, "none")) { |
4408 | mddev->persistent = 0; | |
e691063a N |
4409 | mddev->external = 0; |
4410 | mddev->major_version = 0; | |
4411 | mddev->minor_version = 90; | |
6791875e | 4412 | goto out_unlock; |
e691063a N |
4413 | } |
4414 | if (strncmp(buf, "external:", 9) == 0) { | |
20a49ff6 | 4415 | size_t namelen = len-9; |
e691063a N |
4416 | if (namelen >= sizeof(mddev->metadata_type)) |
4417 | namelen = sizeof(mddev->metadata_type)-1; | |
4418 | strncpy(mddev->metadata_type, buf+9, namelen); | |
4419 | mddev->metadata_type[namelen] = 0; | |
4420 | if (namelen && mddev->metadata_type[namelen-1] == '\n') | |
4421 | mddev->metadata_type[--namelen] = 0; | |
4422 | mddev->persistent = 0; | |
4423 | mddev->external = 1; | |
8bb93aac N |
4424 | mddev->major_version = 0; |
4425 | mddev->minor_version = 90; | |
6791875e | 4426 | goto out_unlock; |
8bb93aac N |
4427 | } |
4428 | major = simple_strtoul(buf, &e, 10); | |
6791875e | 4429 | err = -EINVAL; |
8bb93aac | 4430 | if (e==buf || *e != '.') |
6791875e | 4431 | goto out_unlock; |
8bb93aac N |
4432 | buf = e+1; |
4433 | minor = simple_strtoul(buf, &e, 10); | |
3f9d7b0d | 4434 | if (e==buf || (*e && *e != '\n') ) |
6791875e N |
4435 | goto out_unlock; |
4436 | err = -ENOENT; | |
50511da3 | 4437 | if (major >= ARRAY_SIZE(super_types) || super_types[major].name == NULL) |
6791875e | 4438 | goto out_unlock; |
8bb93aac N |
4439 | mddev->major_version = major; |
4440 | mddev->minor_version = minor; | |
4441 | mddev->persistent = 1; | |
e691063a | 4442 | mddev->external = 0; |
6791875e N |
4443 | err = 0; |
4444 | out_unlock: | |
4445 | mddev_unlock(mddev); | |
4446 | return err ?: len; | |
8bb93aac N |
4447 | } |
4448 | ||
4449 | static struct md_sysfs_entry md_metadata = | |
750f199e | 4450 | __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store); |
8bb93aac | 4451 | |
24dd469d | 4452 | static ssize_t |
fd01b88c | 4453 | action_show(struct mddev *mddev, char *page) |
24dd469d | 4454 | { |
7eec314d | 4455 | char *type = "idle"; |
b7b17c9b N |
4456 | unsigned long recovery = mddev->recovery; |
4457 | if (test_bit(MD_RECOVERY_FROZEN, &recovery)) | |
b6a9ce68 | 4458 | type = "frozen"; |
b7b17c9b N |
4459 | else if (test_bit(MD_RECOVERY_RUNNING, &recovery) || |
4460 | (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &recovery))) { | |
4461 | if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) | |
ccfcc3c1 | 4462 | type = "reshape"; |
b7b17c9b N |
4463 | else if (test_bit(MD_RECOVERY_SYNC, &recovery)) { |
4464 | if (!test_bit(MD_RECOVERY_REQUESTED, &recovery)) | |
24dd469d | 4465 | type = "resync"; |
b7b17c9b | 4466 | else if (test_bit(MD_RECOVERY_CHECK, &recovery)) |
24dd469d N |
4467 | type = "check"; |
4468 | else | |
4469 | type = "repair"; | |
b7b17c9b | 4470 | } else if (test_bit(MD_RECOVERY_RECOVER, &recovery)) |
24dd469d | 4471 | type = "recover"; |
985ca973 N |
4472 | else if (mddev->reshape_position != MaxSector) |
4473 | type = "reshape"; | |
24dd469d N |
4474 | } |
4475 | return sprintf(page, "%s\n", type); | |
4476 | } | |
4477 | ||
4478 | static ssize_t | |
fd01b88c | 4479 | action_store(struct mddev *mddev, const char *page, size_t len) |
24dd469d | 4480 | { |
7eec314d N |
4481 | if (!mddev->pers || !mddev->pers->sync_request) |
4482 | return -EINVAL; | |
4483 | ||
b6a9ce68 N |
4484 | |
4485 | if (cmd_match(page, "idle") || cmd_match(page, "frozen")) { | |
56ccc112 N |
4486 | if (cmd_match(page, "frozen")) |
4487 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4488 | else | |
4489 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
8e8e2518 N |
4490 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
4491 | mddev_lock(mddev) == 0) { | |
4492 | flush_workqueue(md_misc_wq); | |
4493 | if (mddev->sync_thread) { | |
4494 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
6791875e | 4495 | md_reap_sync_thread(mddev); |
6791875e | 4496 | } |
8e8e2518 | 4497 | mddev_unlock(mddev); |
7eec314d | 4498 | } |
312045ee | 4499 | } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
24dd469d | 4500 | return -EBUSY; |
72a23c21 | 4501 | else if (cmd_match(page, "resync")) |
56ccc112 | 4502 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4503 | else if (cmd_match(page, "recover")) { |
56ccc112 | 4504 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4505 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
72a23c21 | 4506 | } else if (cmd_match(page, "reshape")) { |
16484bf5 N |
4507 | int err; |
4508 | if (mddev->pers->start_reshape == NULL) | |
4509 | return -EINVAL; | |
6791875e N |
4510 | err = mddev_lock(mddev); |
4511 | if (!err) { | |
312045ee N |
4512 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4513 | err = -EBUSY; | |
4514 | else { | |
4515 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4516 | err = mddev->pers->start_reshape(mddev); | |
4517 | } | |
6791875e N |
4518 | mddev_unlock(mddev); |
4519 | } | |
16484bf5 N |
4520 | if (err) |
4521 | return err; | |
a99ac971 | 4522 | sysfs_notify(&mddev->kobj, NULL, "degraded"); |
16484bf5 | 4523 | } else { |
bce74dac | 4524 | if (cmd_match(page, "check")) |
7eec314d | 4525 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
2adc7d47 | 4526 | else if (!cmd_match(page, "repair")) |
7eec314d | 4527 | return -EINVAL; |
56ccc112 | 4528 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
7eec314d N |
4529 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
4530 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
7eec314d | 4531 | } |
48c26ddc N |
4532 | if (mddev->ro == 2) { |
4533 | /* A write to sync_action is enough to justify | |
4534 | * canceling read-auto mode | |
4535 | */ | |
4536 | mddev->ro = 0; | |
4537 | md_wakeup_thread(mddev->sync_thread); | |
4538 | } | |
03c902e1 | 4539 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
24dd469d | 4540 | md_wakeup_thread(mddev->thread); |
00bcb4ac | 4541 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
24dd469d N |
4542 | return len; |
4543 | } | |
4544 | ||
c4a39551 | 4545 | static struct md_sysfs_entry md_scan_mode = |
750f199e | 4546 | __ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store); |
c4a39551 JB |
4547 | |
4548 | static ssize_t | |
4549 | last_sync_action_show(struct mddev *mddev, char *page) | |
4550 | { | |
4551 | return sprintf(page, "%s\n", mddev->last_sync_action); | |
4552 | } | |
4553 | ||
4554 | static struct md_sysfs_entry md_last_scan_mode = __ATTR_RO(last_sync_action); | |
4555 | ||
9d88883e | 4556 | static ssize_t |
fd01b88c | 4557 | mismatch_cnt_show(struct mddev *mddev, char *page) |
9d88883e N |
4558 | { |
4559 | return sprintf(page, "%llu\n", | |
7f7583d4 JM |
4560 | (unsigned long long) |
4561 | atomic64_read(&mddev->resync_mismatches)); | |
9d88883e N |
4562 | } |
4563 | ||
80ca3a44 | 4564 | static struct md_sysfs_entry md_mismatches = __ATTR_RO(mismatch_cnt); |
9d88883e | 4565 | |
88202a0c | 4566 | static ssize_t |
fd01b88c | 4567 | sync_min_show(struct mddev *mddev, char *page) |
88202a0c N |
4568 | { |
4569 | return sprintf(page, "%d (%s)\n", speed_min(mddev), | |
4570 | mddev->sync_speed_min ? "local": "system"); | |
4571 | } | |
4572 | ||
4573 | static ssize_t | |
fd01b88c | 4574 | sync_min_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4575 | { |
4c9309c0 AD |
4576 | unsigned int min; |
4577 | int rv; | |
4578 | ||
88202a0c | 4579 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4580 | min = 0; |
4581 | } else { | |
4582 | rv = kstrtouint(buf, 10, &min); | |
4583 | if (rv < 0) | |
4584 | return rv; | |
4585 | if (min == 0) | |
4586 | return -EINVAL; | |
88202a0c | 4587 | } |
88202a0c N |
4588 | mddev->sync_speed_min = min; |
4589 | return len; | |
4590 | } | |
4591 | ||
4592 | static struct md_sysfs_entry md_sync_min = | |
4593 | __ATTR(sync_speed_min, S_IRUGO|S_IWUSR, sync_min_show, sync_min_store); | |
4594 | ||
4595 | static ssize_t | |
fd01b88c | 4596 | sync_max_show(struct mddev *mddev, char *page) |
88202a0c N |
4597 | { |
4598 | return sprintf(page, "%d (%s)\n", speed_max(mddev), | |
4599 | mddev->sync_speed_max ? "local": "system"); | |
4600 | } | |
4601 | ||
4602 | static ssize_t | |
fd01b88c | 4603 | sync_max_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4604 | { |
4c9309c0 AD |
4605 | unsigned int max; |
4606 | int rv; | |
4607 | ||
88202a0c | 4608 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4609 | max = 0; |
4610 | } else { | |
4611 | rv = kstrtouint(buf, 10, &max); | |
4612 | if (rv < 0) | |
4613 | return rv; | |
4614 | if (max == 0) | |
4615 | return -EINVAL; | |
88202a0c | 4616 | } |
88202a0c N |
4617 | mddev->sync_speed_max = max; |
4618 | return len; | |
4619 | } | |
4620 | ||
4621 | static struct md_sysfs_entry md_sync_max = | |
4622 | __ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store); | |
4623 | ||
d7f3d291 | 4624 | static ssize_t |
fd01b88c | 4625 | degraded_show(struct mddev *mddev, char *page) |
d7f3d291 IP |
4626 | { |
4627 | return sprintf(page, "%d\n", mddev->degraded); | |
4628 | } | |
4629 | static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded); | |
88202a0c | 4630 | |
90b08710 | 4631 | static ssize_t |
fd01b88c | 4632 | sync_force_parallel_show(struct mddev *mddev, char *page) |
90b08710 BS |
4633 | { |
4634 | return sprintf(page, "%d\n", mddev->parallel_resync); | |
4635 | } | |
4636 | ||
4637 | static ssize_t | |
fd01b88c | 4638 | sync_force_parallel_store(struct mddev *mddev, const char *buf, size_t len) |
90b08710 BS |
4639 | { |
4640 | long n; | |
4641 | ||
b29bebd6 | 4642 | if (kstrtol(buf, 10, &n)) |
90b08710 BS |
4643 | return -EINVAL; |
4644 | ||
4645 | if (n != 0 && n != 1) | |
4646 | return -EINVAL; | |
4647 | ||
4648 | mddev->parallel_resync = n; | |
4649 | ||
4650 | if (mddev->sync_thread) | |
4651 | wake_up(&resync_wait); | |
4652 | ||
4653 | return len; | |
4654 | } | |
4655 | ||
4656 | /* force parallel resync, even with shared block devices */ | |
4657 | static struct md_sysfs_entry md_sync_force_parallel = | |
4658 | __ATTR(sync_force_parallel, S_IRUGO|S_IWUSR, | |
4659 | sync_force_parallel_show, sync_force_parallel_store); | |
4660 | ||
88202a0c | 4661 | static ssize_t |
fd01b88c | 4662 | sync_speed_show(struct mddev *mddev, char *page) |
88202a0c N |
4663 | { |
4664 | unsigned long resync, dt, db; | |
d1a7c503 N |
4665 | if (mddev->curr_resync == 0) |
4666 | return sprintf(page, "none\n"); | |
9687a60c AN |
4667 | resync = mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active); |
4668 | dt = (jiffies - mddev->resync_mark) / HZ; | |
88202a0c | 4669 | if (!dt) dt++; |
9687a60c AN |
4670 | db = resync - mddev->resync_mark_cnt; |
4671 | return sprintf(page, "%lu\n", db/dt/2); /* K/sec */ | |
88202a0c N |
4672 | } |
4673 | ||
80ca3a44 | 4674 | static struct md_sysfs_entry md_sync_speed = __ATTR_RO(sync_speed); |
88202a0c N |
4675 | |
4676 | static ssize_t | |
fd01b88c | 4677 | sync_completed_show(struct mddev *mddev, char *page) |
88202a0c | 4678 | { |
13ae864b | 4679 | unsigned long long max_sectors, resync; |
88202a0c | 4680 | |
acb180b0 N |
4681 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4682 | return sprintf(page, "none\n"); | |
4683 | ||
72f36d59 N |
4684 | if (mddev->curr_resync == 1 || |
4685 | mddev->curr_resync == 2) | |
4686 | return sprintf(page, "delayed\n"); | |
4687 | ||
c804cdec N |
4688 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
4689 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
58c0fed4 | 4690 | max_sectors = mddev->resync_max_sectors; |
88202a0c | 4691 | else |
58c0fed4 | 4692 | max_sectors = mddev->dev_sectors; |
88202a0c | 4693 | |
acb180b0 | 4694 | resync = mddev->curr_resync_completed; |
13ae864b | 4695 | return sprintf(page, "%llu / %llu\n", resync, max_sectors); |
88202a0c N |
4696 | } |
4697 | ||
750f199e N |
4698 | static struct md_sysfs_entry md_sync_completed = |
4699 | __ATTR_PREALLOC(sync_completed, S_IRUGO, sync_completed_show, NULL); | |
88202a0c | 4700 | |
5e96ee65 | 4701 | static ssize_t |
fd01b88c | 4702 | min_sync_show(struct mddev *mddev, char *page) |
5e96ee65 NB |
4703 | { |
4704 | return sprintf(page, "%llu\n", | |
4705 | (unsigned long long)mddev->resync_min); | |
4706 | } | |
4707 | static ssize_t | |
fd01b88c | 4708 | min_sync_store(struct mddev *mddev, const char *buf, size_t len) |
5e96ee65 NB |
4709 | { |
4710 | unsigned long long min; | |
23da422b | 4711 | int err; |
23da422b | 4712 | |
b29bebd6 | 4713 | if (kstrtoull(buf, 10, &min)) |
5e96ee65 | 4714 | return -EINVAL; |
23da422b N |
4715 | |
4716 | spin_lock(&mddev->lock); | |
4717 | err = -EINVAL; | |
5e96ee65 | 4718 | if (min > mddev->resync_max) |
23da422b N |
4719 | goto out_unlock; |
4720 | ||
4721 | err = -EBUSY; | |
5e96ee65 | 4722 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 4723 | goto out_unlock; |
5e96ee65 | 4724 | |
50c37b13 N |
4725 | /* Round down to multiple of 4K for safety */ |
4726 | mddev->resync_min = round_down(min, 8); | |
23da422b | 4727 | err = 0; |
5e96ee65 | 4728 | |
23da422b N |
4729 | out_unlock: |
4730 | spin_unlock(&mddev->lock); | |
4731 | return err ?: len; | |
5e96ee65 NB |
4732 | } |
4733 | ||
4734 | static struct md_sysfs_entry md_min_sync = | |
4735 | __ATTR(sync_min, S_IRUGO|S_IWUSR, min_sync_show, min_sync_store); | |
4736 | ||
c6207277 | 4737 | static ssize_t |
fd01b88c | 4738 | max_sync_show(struct mddev *mddev, char *page) |
c6207277 N |
4739 | { |
4740 | if (mddev->resync_max == MaxSector) | |
4741 | return sprintf(page, "max\n"); | |
4742 | else | |
4743 | return sprintf(page, "%llu\n", | |
4744 | (unsigned long long)mddev->resync_max); | |
4745 | } | |
4746 | static ssize_t | |
fd01b88c | 4747 | max_sync_store(struct mddev *mddev, const char *buf, size_t len) |
c6207277 | 4748 | { |
23da422b N |
4749 | int err; |
4750 | spin_lock(&mddev->lock); | |
c6207277 N |
4751 | if (strncmp(buf, "max", 3) == 0) |
4752 | mddev->resync_max = MaxSector; | |
4753 | else { | |
5e96ee65 | 4754 | unsigned long long max; |
23da422b N |
4755 | int chunk; |
4756 | ||
4757 | err = -EINVAL; | |
b29bebd6 | 4758 | if (kstrtoull(buf, 10, &max)) |
23da422b | 4759 | goto out_unlock; |
5e96ee65 | 4760 | if (max < mddev->resync_min) |
23da422b N |
4761 | goto out_unlock; |
4762 | ||
4763 | err = -EBUSY; | |
c6207277 | 4764 | if (max < mddev->resync_max && |
4d484a4a | 4765 | mddev->ro == 0 && |
c6207277 | 4766 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 4767 | goto out_unlock; |
c6207277 N |
4768 | |
4769 | /* Must be a multiple of chunk_size */ | |
23da422b N |
4770 | chunk = mddev->chunk_sectors; |
4771 | if (chunk) { | |
2ac06c33 | 4772 | sector_t temp = max; |
23da422b N |
4773 | |
4774 | err = -EINVAL; | |
4775 | if (sector_div(temp, chunk)) | |
4776 | goto out_unlock; | |
c6207277 N |
4777 | } |
4778 | mddev->resync_max = max; | |
4779 | } | |
4780 | wake_up(&mddev->recovery_wait); | |
23da422b N |
4781 | err = 0; |
4782 | out_unlock: | |
4783 | spin_unlock(&mddev->lock); | |
4784 | return err ?: len; | |
c6207277 N |
4785 | } |
4786 | ||
4787 | static struct md_sysfs_entry md_max_sync = | |
4788 | __ATTR(sync_max, S_IRUGO|S_IWUSR, max_sync_show, max_sync_store); | |
4789 | ||
e464eafd | 4790 | static ssize_t |
fd01b88c | 4791 | suspend_lo_show(struct mddev *mddev, char *page) |
e464eafd N |
4792 | { |
4793 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_lo); | |
4794 | } | |
4795 | ||
4796 | static ssize_t | |
fd01b88c | 4797 | suspend_lo_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 4798 | { |
4c9309c0 | 4799 | unsigned long long old, new; |
6791875e | 4800 | int err; |
e464eafd | 4801 | |
4c9309c0 AD |
4802 | err = kstrtoull(buf, 10, &new); |
4803 | if (err < 0) | |
4804 | return err; | |
4805 | if (new != (sector_t)new) | |
e464eafd | 4806 | return -EINVAL; |
23ddff37 | 4807 | |
6791875e N |
4808 | err = mddev_lock(mddev); |
4809 | if (err) | |
4810 | return err; | |
4811 | err = -EINVAL; | |
4812 | if (mddev->pers == NULL || | |
4813 | mddev->pers->quiesce == NULL) | |
4814 | goto unlock; | |
4815 | old = mddev->suspend_lo; | |
23ddff37 N |
4816 | mddev->suspend_lo = new; |
4817 | if (new >= old) | |
4818 | /* Shrinking suspended region */ | |
e464eafd | 4819 | mddev->pers->quiesce(mddev, 2); |
23ddff37 N |
4820 | else { |
4821 | /* Expanding suspended region - need to wait */ | |
4822 | mddev->pers->quiesce(mddev, 1); | |
4823 | mddev->pers->quiesce(mddev, 0); | |
4824 | } | |
6791875e N |
4825 | err = 0; |
4826 | unlock: | |
4827 | mddev_unlock(mddev); | |
4828 | return err ?: len; | |
e464eafd N |
4829 | } |
4830 | static struct md_sysfs_entry md_suspend_lo = | |
4831 | __ATTR(suspend_lo, S_IRUGO|S_IWUSR, suspend_lo_show, suspend_lo_store); | |
4832 | ||
e464eafd | 4833 | static ssize_t |
fd01b88c | 4834 | suspend_hi_show(struct mddev *mddev, char *page) |
e464eafd N |
4835 | { |
4836 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_hi); | |
4837 | } | |
4838 | ||
4839 | static ssize_t | |
fd01b88c | 4840 | suspend_hi_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 4841 | { |
4c9309c0 | 4842 | unsigned long long old, new; |
6791875e | 4843 | int err; |
e464eafd | 4844 | |
4c9309c0 AD |
4845 | err = kstrtoull(buf, 10, &new); |
4846 | if (err < 0) | |
4847 | return err; | |
4848 | if (new != (sector_t)new) | |
e464eafd | 4849 | return -EINVAL; |
23ddff37 | 4850 | |
6791875e N |
4851 | err = mddev_lock(mddev); |
4852 | if (err) | |
4853 | return err; | |
4854 | err = -EINVAL; | |
4855 | if (mddev->pers == NULL || | |
4856 | mddev->pers->quiesce == NULL) | |
4857 | goto unlock; | |
4858 | old = mddev->suspend_hi; | |
23ddff37 N |
4859 | mddev->suspend_hi = new; |
4860 | if (new <= old) | |
4861 | /* Shrinking suspended region */ | |
4862 | mddev->pers->quiesce(mddev, 2); | |
4863 | else { | |
4864 | /* Expanding suspended region - need to wait */ | |
e464eafd N |
4865 | mddev->pers->quiesce(mddev, 1); |
4866 | mddev->pers->quiesce(mddev, 0); | |
23ddff37 | 4867 | } |
6791875e N |
4868 | err = 0; |
4869 | unlock: | |
4870 | mddev_unlock(mddev); | |
4871 | return err ?: len; | |
e464eafd N |
4872 | } |
4873 | static struct md_sysfs_entry md_suspend_hi = | |
4874 | __ATTR(suspend_hi, S_IRUGO|S_IWUSR, suspend_hi_show, suspend_hi_store); | |
4875 | ||
08a02ecd | 4876 | static ssize_t |
fd01b88c | 4877 | reshape_position_show(struct mddev *mddev, char *page) |
08a02ecd N |
4878 | { |
4879 | if (mddev->reshape_position != MaxSector) | |
4880 | return sprintf(page, "%llu\n", | |
4881 | (unsigned long long)mddev->reshape_position); | |
4882 | strcpy(page, "none\n"); | |
4883 | return 5; | |
4884 | } | |
4885 | ||
4886 | static ssize_t | |
fd01b88c | 4887 | reshape_position_store(struct mddev *mddev, const char *buf, size_t len) |
08a02ecd | 4888 | { |
c6563a8c | 4889 | struct md_rdev *rdev; |
4c9309c0 | 4890 | unsigned long long new; |
6791875e | 4891 | int err; |
6791875e | 4892 | |
4c9309c0 AD |
4893 | err = kstrtoull(buf, 10, &new); |
4894 | if (err < 0) | |
4895 | return err; | |
4896 | if (new != (sector_t)new) | |
08a02ecd | 4897 | return -EINVAL; |
6791875e N |
4898 | err = mddev_lock(mddev); |
4899 | if (err) | |
4900 | return err; | |
4901 | err = -EBUSY; | |
4902 | if (mddev->pers) | |
4903 | goto unlock; | |
08a02ecd N |
4904 | mddev->reshape_position = new; |
4905 | mddev->delta_disks = 0; | |
2c810cdd | 4906 | mddev->reshape_backwards = 0; |
08a02ecd N |
4907 | mddev->new_level = mddev->level; |
4908 | mddev->new_layout = mddev->layout; | |
664e7c41 | 4909 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
c6563a8c N |
4910 | rdev_for_each(rdev, mddev) |
4911 | rdev->new_data_offset = rdev->data_offset; | |
6791875e N |
4912 | err = 0; |
4913 | unlock: | |
4914 | mddev_unlock(mddev); | |
4915 | return err ?: len; | |
08a02ecd N |
4916 | } |
4917 | ||
4918 | static struct md_sysfs_entry md_reshape_position = | |
4919 | __ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show, | |
4920 | reshape_position_store); | |
4921 | ||
2c810cdd N |
4922 | static ssize_t |
4923 | reshape_direction_show(struct mddev *mddev, char *page) | |
4924 | { | |
4925 | return sprintf(page, "%s\n", | |
4926 | mddev->reshape_backwards ? "backwards" : "forwards"); | |
4927 | } | |
4928 | ||
4929 | static ssize_t | |
4930 | reshape_direction_store(struct mddev *mddev, const char *buf, size_t len) | |
4931 | { | |
4932 | int backwards = 0; | |
6791875e N |
4933 | int err; |
4934 | ||
2c810cdd N |
4935 | if (cmd_match(buf, "forwards")) |
4936 | backwards = 0; | |
4937 | else if (cmd_match(buf, "backwards")) | |
4938 | backwards = 1; | |
4939 | else | |
4940 | return -EINVAL; | |
4941 | if (mddev->reshape_backwards == backwards) | |
4942 | return len; | |
4943 | ||
6791875e N |
4944 | err = mddev_lock(mddev); |
4945 | if (err) | |
4946 | return err; | |
2c810cdd N |
4947 | /* check if we are allowed to change */ |
4948 | if (mddev->delta_disks) | |
6791875e N |
4949 | err = -EBUSY; |
4950 | else if (mddev->persistent && | |
2c810cdd | 4951 | mddev->major_version == 0) |
6791875e N |
4952 | err = -EINVAL; |
4953 | else | |
4954 | mddev->reshape_backwards = backwards; | |
4955 | mddev_unlock(mddev); | |
4956 | return err ?: len; | |
2c810cdd N |
4957 | } |
4958 | ||
4959 | static struct md_sysfs_entry md_reshape_direction = | |
4960 | __ATTR(reshape_direction, S_IRUGO|S_IWUSR, reshape_direction_show, | |
4961 | reshape_direction_store); | |
4962 | ||
b522adcd | 4963 | static ssize_t |
fd01b88c | 4964 | array_size_show(struct mddev *mddev, char *page) |
b522adcd DW |
4965 | { |
4966 | if (mddev->external_size) | |
4967 | return sprintf(page, "%llu\n", | |
4968 | (unsigned long long)mddev->array_sectors/2); | |
4969 | else | |
4970 | return sprintf(page, "default\n"); | |
4971 | } | |
4972 | ||
4973 | static ssize_t | |
fd01b88c | 4974 | array_size_store(struct mddev *mddev, const char *buf, size_t len) |
b522adcd DW |
4975 | { |
4976 | sector_t sectors; | |
6791875e N |
4977 | int err; |
4978 | ||
4979 | err = mddev_lock(mddev); | |
4980 | if (err) | |
4981 | return err; | |
b522adcd | 4982 | |
ab5a98b1 | 4983 | /* cluster raid doesn't support change array_sectors */ |
b670883b ZL |
4984 | if (mddev_is_clustered(mddev)) { |
4985 | mddev_unlock(mddev); | |
ab5a98b1 | 4986 | return -EINVAL; |
b670883b | 4987 | } |
ab5a98b1 | 4988 | |
b522adcd DW |
4989 | if (strncmp(buf, "default", 7) == 0) { |
4990 | if (mddev->pers) | |
4991 | sectors = mddev->pers->size(mddev, 0, 0); | |
4992 | else | |
4993 | sectors = mddev->array_sectors; | |
4994 | ||
4995 | mddev->external_size = 0; | |
4996 | } else { | |
4997 | if (strict_blocks_to_sectors(buf, §ors) < 0) | |
6791875e N |
4998 | err = -EINVAL; |
4999 | else if (mddev->pers && mddev->pers->size(mddev, 0, 0) < sectors) | |
5000 | err = -E2BIG; | |
5001 | else | |
5002 | mddev->external_size = 1; | |
b522adcd DW |
5003 | } |
5004 | ||
6791875e N |
5005 | if (!err) { |
5006 | mddev->array_sectors = sectors; | |
5007 | if (mddev->pers) { | |
5008 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
5009 | revalidate_disk(mddev->gendisk); | |
5010 | } | |
cbe6ef1d | 5011 | } |
6791875e N |
5012 | mddev_unlock(mddev); |
5013 | return err ?: len; | |
b522adcd DW |
5014 | } |
5015 | ||
5016 | static struct md_sysfs_entry md_array_size = | |
5017 | __ATTR(array_size, S_IRUGO|S_IWUSR, array_size_show, | |
5018 | array_size_store); | |
e464eafd | 5019 | |
664aed04 AP |
5020 | static ssize_t |
5021 | consistency_policy_show(struct mddev *mddev, char *page) | |
5022 | { | |
5023 | int ret; | |
5024 | ||
5025 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) { | |
5026 | ret = sprintf(page, "journal\n"); | |
5027 | } else if (test_bit(MD_HAS_PPL, &mddev->flags)) { | |
5028 | ret = sprintf(page, "ppl\n"); | |
5029 | } else if (mddev->bitmap) { | |
5030 | ret = sprintf(page, "bitmap\n"); | |
5031 | } else if (mddev->pers) { | |
5032 | if (mddev->pers->sync_request) | |
5033 | ret = sprintf(page, "resync\n"); | |
5034 | else | |
5035 | ret = sprintf(page, "none\n"); | |
5036 | } else { | |
5037 | ret = sprintf(page, "unknown\n"); | |
5038 | } | |
5039 | ||
5040 | return ret; | |
5041 | } | |
5042 | ||
5043 | static ssize_t | |
5044 | consistency_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5045 | { | |
ba903a3e AP |
5046 | int err = 0; |
5047 | ||
664aed04 | 5048 | if (mddev->pers) { |
ba903a3e AP |
5049 | if (mddev->pers->change_consistency_policy) |
5050 | err = mddev->pers->change_consistency_policy(mddev, buf); | |
5051 | else | |
5052 | err = -EBUSY; | |
664aed04 AP |
5053 | } else if (mddev->external && strncmp(buf, "ppl", 3) == 0) { |
5054 | set_bit(MD_HAS_PPL, &mddev->flags); | |
664aed04 | 5055 | } else { |
ba903a3e | 5056 | err = -EINVAL; |
664aed04 | 5057 | } |
ba903a3e AP |
5058 | |
5059 | return err ? err : len; | |
664aed04 AP |
5060 | } |
5061 | ||
5062 | static struct md_sysfs_entry md_consistency_policy = | |
5063 | __ATTR(consistency_policy, S_IRUGO | S_IWUSR, consistency_policy_show, | |
5064 | consistency_policy_store); | |
5065 | ||
eae1701f N |
5066 | static struct attribute *md_default_attrs[] = { |
5067 | &md_level.attr, | |
d4dbd025 | 5068 | &md_layout.attr, |
eae1701f | 5069 | &md_raid_disks.attr, |
3b34380a | 5070 | &md_chunk_size.attr, |
a35b0d69 | 5071 | &md_size.attr, |
a94213b1 | 5072 | &md_resync_start.attr, |
8bb93aac | 5073 | &md_metadata.attr, |
6d7ff738 | 5074 | &md_new_device.attr, |
16f17b39 | 5075 | &md_safe_delay.attr, |
9e653b63 | 5076 | &md_array_state.attr, |
08a02ecd | 5077 | &md_reshape_position.attr, |
2c810cdd | 5078 | &md_reshape_direction.attr, |
b522adcd | 5079 | &md_array_size.attr, |
1e50915f | 5080 | &max_corr_read_errors.attr, |
664aed04 | 5081 | &md_consistency_policy.attr, |
411036fa N |
5082 | NULL, |
5083 | }; | |
5084 | ||
5085 | static struct attribute *md_redundancy_attrs[] = { | |
24dd469d | 5086 | &md_scan_mode.attr, |
c4a39551 | 5087 | &md_last_scan_mode.attr, |
9d88883e | 5088 | &md_mismatches.attr, |
88202a0c N |
5089 | &md_sync_min.attr, |
5090 | &md_sync_max.attr, | |
5091 | &md_sync_speed.attr, | |
90b08710 | 5092 | &md_sync_force_parallel.attr, |
88202a0c | 5093 | &md_sync_completed.attr, |
5e96ee65 | 5094 | &md_min_sync.attr, |
c6207277 | 5095 | &md_max_sync.attr, |
e464eafd N |
5096 | &md_suspend_lo.attr, |
5097 | &md_suspend_hi.attr, | |
9b1d1dac | 5098 | &md_bitmap.attr, |
d7f3d291 | 5099 | &md_degraded.attr, |
eae1701f N |
5100 | NULL, |
5101 | }; | |
411036fa N |
5102 | static struct attribute_group md_redundancy_group = { |
5103 | .name = NULL, | |
5104 | .attrs = md_redundancy_attrs, | |
5105 | }; | |
5106 | ||
eae1701f N |
5107 | static ssize_t |
5108 | md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
5109 | { | |
5110 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5111 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5112 | ssize_t rv; |
eae1701f N |
5113 | |
5114 | if (!entry->show) | |
5115 | return -EIO; | |
af8a2434 N |
5116 | spin_lock(&all_mddevs_lock); |
5117 | if (list_empty(&mddev->all_mddevs)) { | |
5118 | spin_unlock(&all_mddevs_lock); | |
5119 | return -EBUSY; | |
5120 | } | |
5121 | mddev_get(mddev); | |
5122 | spin_unlock(&all_mddevs_lock); | |
5123 | ||
b7b17c9b | 5124 | rv = entry->show(mddev, page); |
af8a2434 | 5125 | mddev_put(mddev); |
96de1e66 | 5126 | return rv; |
eae1701f N |
5127 | } |
5128 | ||
5129 | static ssize_t | |
5130 | md_attr_store(struct kobject *kobj, struct attribute *attr, | |
5131 | const char *page, size_t length) | |
5132 | { | |
5133 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5134 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5135 | ssize_t rv; |
eae1701f N |
5136 | |
5137 | if (!entry->store) | |
5138 | return -EIO; | |
67463acb N |
5139 | if (!capable(CAP_SYS_ADMIN)) |
5140 | return -EACCES; | |
af8a2434 N |
5141 | spin_lock(&all_mddevs_lock); |
5142 | if (list_empty(&mddev->all_mddevs)) { | |
5143 | spin_unlock(&all_mddevs_lock); | |
5144 | return -EBUSY; | |
5145 | } | |
5146 | mddev_get(mddev); | |
5147 | spin_unlock(&all_mddevs_lock); | |
6791875e | 5148 | rv = entry->store(mddev, page, length); |
af8a2434 | 5149 | mddev_put(mddev); |
96de1e66 | 5150 | return rv; |
eae1701f N |
5151 | } |
5152 | ||
5153 | static void md_free(struct kobject *ko) | |
5154 | { | |
fd01b88c | 5155 | struct mddev *mddev = container_of(ko, struct mddev, kobj); |
a21d1504 N |
5156 | |
5157 | if (mddev->sysfs_state) | |
5158 | sysfs_put(mddev->sysfs_state); | |
5159 | ||
6cd18e71 N |
5160 | if (mddev->queue) |
5161 | blk_cleanup_queue(mddev->queue); | |
a21d1504 N |
5162 | if (mddev->gendisk) { |
5163 | del_gendisk(mddev->gendisk); | |
5164 | put_disk(mddev->gendisk); | |
5165 | } | |
4ad23a97 | 5166 | percpu_ref_exit(&mddev->writes_pending); |
a21d1504 | 5167 | |
eae1701f N |
5168 | kfree(mddev); |
5169 | } | |
5170 | ||
52cf25d0 | 5171 | static const struct sysfs_ops md_sysfs_ops = { |
eae1701f N |
5172 | .show = md_attr_show, |
5173 | .store = md_attr_store, | |
5174 | }; | |
5175 | static struct kobj_type md_ktype = { | |
5176 | .release = md_free, | |
5177 | .sysfs_ops = &md_sysfs_ops, | |
5178 | .default_attrs = md_default_attrs, | |
5179 | }; | |
5180 | ||
1da177e4 LT |
5181 | int mdp_major = 0; |
5182 | ||
5fd3a17e DW |
5183 | static void mddev_delayed_delete(struct work_struct *ws) |
5184 | { | |
fd01b88c | 5185 | struct mddev *mddev = container_of(ws, struct mddev, del_work); |
5fd3a17e | 5186 | |
43a70507 | 5187 | sysfs_remove_group(&mddev->kobj, &md_bitmap_group); |
5fd3a17e DW |
5188 | kobject_del(&mddev->kobj); |
5189 | kobject_put(&mddev->kobj); | |
5190 | } | |
5191 | ||
4ad23a97 N |
5192 | static void no_op(struct percpu_ref *r) {} |
5193 | ||
a415c0f1 N |
5194 | int mddev_init_writes_pending(struct mddev *mddev) |
5195 | { | |
5196 | if (mddev->writes_pending.percpu_count_ptr) | |
5197 | return 0; | |
5198 | if (percpu_ref_init(&mddev->writes_pending, no_op, 0, GFP_KERNEL) < 0) | |
5199 | return -ENOMEM; | |
5200 | /* We want to start with the refcount at zero */ | |
5201 | percpu_ref_put(&mddev->writes_pending); | |
5202 | return 0; | |
5203 | } | |
5204 | EXPORT_SYMBOL_GPL(mddev_init_writes_pending); | |
5205 | ||
efeb53c0 | 5206 | static int md_alloc(dev_t dev, char *name) |
1da177e4 | 5207 | { |
039b7225 N |
5208 | /* |
5209 | * If dev is zero, name is the name of a device to allocate with | |
5210 | * an arbitrary minor number. It will be "md_???" | |
5211 | * If dev is non-zero it must be a device number with a MAJOR of | |
5212 | * MD_MAJOR or mdp_major. In this case, if "name" is NULL, then | |
5213 | * the device is being created by opening a node in /dev. | |
5214 | * If "name" is not NULL, the device is being created by | |
5215 | * writing to /sys/module/md_mod/parameters/new_array. | |
5216 | */ | |
48c9c27b | 5217 | static DEFINE_MUTEX(disks_mutex); |
fd01b88c | 5218 | struct mddev *mddev = mddev_find(dev); |
1da177e4 | 5219 | struct gendisk *disk; |
efeb53c0 N |
5220 | int partitioned; |
5221 | int shift; | |
5222 | int unit; | |
3830c62f | 5223 | int error; |
1da177e4 LT |
5224 | |
5225 | if (!mddev) | |
efeb53c0 N |
5226 | return -ENODEV; |
5227 | ||
5228 | partitioned = (MAJOR(mddev->unit) != MD_MAJOR); | |
5229 | shift = partitioned ? MdpMinorShift : 0; | |
5230 | unit = MINOR(mddev->unit) >> shift; | |
1da177e4 | 5231 | |
e804ac78 TH |
5232 | /* wait for any previous instance of this device to be |
5233 | * completely removed (mddev_delayed_delete). | |
d3374825 | 5234 | */ |
e804ac78 | 5235 | flush_workqueue(md_misc_wq); |
d3374825 | 5236 | |
48c9c27b | 5237 | mutex_lock(&disks_mutex); |
0909dc44 N |
5238 | error = -EEXIST; |
5239 | if (mddev->gendisk) | |
5240 | goto abort; | |
efeb53c0 | 5241 | |
039b7225 | 5242 | if (name && !dev) { |
efeb53c0 N |
5243 | /* Need to ensure that 'name' is not a duplicate. |
5244 | */ | |
fd01b88c | 5245 | struct mddev *mddev2; |
efeb53c0 N |
5246 | spin_lock(&all_mddevs_lock); |
5247 | ||
5248 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) | |
5249 | if (mddev2->gendisk && | |
5250 | strcmp(mddev2->gendisk->disk_name, name) == 0) { | |
5251 | spin_unlock(&all_mddevs_lock); | |
0909dc44 | 5252 | goto abort; |
efeb53c0 N |
5253 | } |
5254 | spin_unlock(&all_mddevs_lock); | |
1da177e4 | 5255 | } |
039b7225 N |
5256 | if (name && dev) |
5257 | /* | |
5258 | * Creating /dev/mdNNN via "newarray", so adjust hold_active. | |
5259 | */ | |
5260 | mddev->hold_active = UNTIL_STOP; | |
8b765398 | 5261 | |
0909dc44 | 5262 | error = -ENOMEM; |
8b765398 | 5263 | mddev->queue = blk_alloc_queue(GFP_KERNEL); |
0909dc44 N |
5264 | if (!mddev->queue) |
5265 | goto abort; | |
409c57f3 N |
5266 | mddev->queue->queuedata = mddev; |
5267 | ||
409c57f3 | 5268 | blk_queue_make_request(mddev->queue, md_make_request); |
b1bd055d | 5269 | blk_set_stacking_limits(&mddev->queue->limits); |
8b765398 | 5270 | |
1da177e4 LT |
5271 | disk = alloc_disk(1 << shift); |
5272 | if (!disk) { | |
8b765398 N |
5273 | blk_cleanup_queue(mddev->queue); |
5274 | mddev->queue = NULL; | |
0909dc44 | 5275 | goto abort; |
1da177e4 | 5276 | } |
efeb53c0 | 5277 | disk->major = MAJOR(mddev->unit); |
1da177e4 | 5278 | disk->first_minor = unit << shift; |
efeb53c0 N |
5279 | if (name) |
5280 | strcpy(disk->disk_name, name); | |
5281 | else if (partitioned) | |
1da177e4 | 5282 | sprintf(disk->disk_name, "md_d%d", unit); |
ce7b0f46 | 5283 | else |
1da177e4 | 5284 | sprintf(disk->disk_name, "md%d", unit); |
1da177e4 LT |
5285 | disk->fops = &md_fops; |
5286 | disk->private_data = mddev; | |
5287 | disk->queue = mddev->queue; | |
56883a7e | 5288 | blk_queue_write_cache(mddev->queue, true, true); |
92850bbd | 5289 | /* Allow extended partitions. This makes the |
d3374825 | 5290 | * 'mdp' device redundant, but we can't really |
92850bbd N |
5291 | * remove it now. |
5292 | */ | |
5293 | disk->flags |= GENHD_FL_EXT_DEVT; | |
1da177e4 | 5294 | mddev->gendisk = disk; |
b0140891 N |
5295 | /* As soon as we call add_disk(), another thread could get |
5296 | * through to md_open, so make sure it doesn't get too far | |
5297 | */ | |
5298 | mutex_lock(&mddev->open_mutex); | |
5299 | add_disk(disk); | |
5300 | ||
ed9e1982 TH |
5301 | error = kobject_init_and_add(&mddev->kobj, &md_ktype, |
5302 | &disk_to_dev(disk)->kobj, "%s", "md"); | |
0909dc44 N |
5303 | if (error) { |
5304 | /* This isn't possible, but as kobject_init_and_add is marked | |
5305 | * __must_check, we must do something with the result | |
5306 | */ | |
9d48739e N |
5307 | pr_debug("md: cannot register %s/md - name in use\n", |
5308 | disk->disk_name); | |
0909dc44 N |
5309 | error = 0; |
5310 | } | |
00bcb4ac N |
5311 | if (mddev->kobj.sd && |
5312 | sysfs_create_group(&mddev->kobj, &md_bitmap_group)) | |
9d48739e | 5313 | pr_debug("pointless warning\n"); |
b0140891 | 5314 | mutex_unlock(&mddev->open_mutex); |
0909dc44 N |
5315 | abort: |
5316 | mutex_unlock(&disks_mutex); | |
00bcb4ac | 5317 | if (!error && mddev->kobj.sd) { |
3830c62f | 5318 | kobject_uevent(&mddev->kobj, KOBJ_ADD); |
00bcb4ac | 5319 | mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state"); |
b62b7590 | 5320 | } |
d3374825 | 5321 | mddev_put(mddev); |
0909dc44 | 5322 | return error; |
efeb53c0 N |
5323 | } |
5324 | ||
5325 | static struct kobject *md_probe(dev_t dev, int *part, void *data) | |
5326 | { | |
78b6350d N |
5327 | if (create_on_open) |
5328 | md_alloc(dev, NULL); | |
1da177e4 LT |
5329 | return NULL; |
5330 | } | |
5331 | ||
efeb53c0 N |
5332 | static int add_named_array(const char *val, struct kernel_param *kp) |
5333 | { | |
039b7225 N |
5334 | /* |
5335 | * val must be "md_*" or "mdNNN". | |
5336 | * For "md_*" we allocate an array with a large free minor number, and | |
efeb53c0 | 5337 | * set the name to val. val must not already be an active name. |
039b7225 N |
5338 | * For "mdNNN" we allocate an array with the minor number NNN |
5339 | * which must not already be in use. | |
efeb53c0 N |
5340 | */ |
5341 | int len = strlen(val); | |
5342 | char buf[DISK_NAME_LEN]; | |
039b7225 | 5343 | unsigned long devnum; |
efeb53c0 N |
5344 | |
5345 | while (len && val[len-1] == '\n') | |
5346 | len--; | |
5347 | if (len >= DISK_NAME_LEN) | |
5348 | return -E2BIG; | |
5349 | strlcpy(buf, val, len+1); | |
039b7225 N |
5350 | if (strncmp(buf, "md_", 3) == 0) |
5351 | return md_alloc(0, buf); | |
5352 | if (strncmp(buf, "md", 2) == 0 && | |
5353 | isdigit(buf[2]) && | |
5354 | kstrtoul(buf+2, 10, &devnum) == 0 && | |
5355 | devnum <= MINORMASK) | |
5356 | return md_alloc(MKDEV(MD_MAJOR, devnum), NULL); | |
5357 | ||
5358 | return -EINVAL; | |
efeb53c0 N |
5359 | } |
5360 | ||
1da177e4 LT |
5361 | static void md_safemode_timeout(unsigned long data) |
5362 | { | |
fd01b88c | 5363 | struct mddev *mddev = (struct mddev *) data; |
1da177e4 | 5364 | |
4ad23a97 N |
5365 | mddev->safemode = 1; |
5366 | if (mddev->external) | |
5367 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
5368 | ||
1da177e4 LT |
5369 | md_wakeup_thread(mddev->thread); |
5370 | } | |
5371 | ||
6ff8d8ec | 5372 | static int start_dirty_degraded; |
1da177e4 | 5373 | |
fd01b88c | 5374 | int md_run(struct mddev *mddev) |
1da177e4 | 5375 | { |
2604b703 | 5376 | int err; |
3cb03002 | 5377 | struct md_rdev *rdev; |
84fc4b56 | 5378 | struct md_personality *pers; |
1da177e4 | 5379 | |
a757e64c N |
5380 | if (list_empty(&mddev->disks)) |
5381 | /* cannot run an array with no devices.. */ | |
1da177e4 | 5382 | return -EINVAL; |
1da177e4 LT |
5383 | |
5384 | if (mddev->pers) | |
5385 | return -EBUSY; | |
bb4f1e9d N |
5386 | /* Cannot run until previous stop completes properly */ |
5387 | if (mddev->sysfs_active) | |
5388 | return -EBUSY; | |
b6eb127d | 5389 | |
1da177e4 LT |
5390 | /* |
5391 | * Analyze all RAID superblock(s) | |
5392 | */ | |
1ec4a939 N |
5393 | if (!mddev->raid_disks) { |
5394 | if (!mddev->persistent) | |
5395 | return -EINVAL; | |
a757e64c | 5396 | analyze_sbs(mddev); |
1ec4a939 | 5397 | } |
1da177e4 | 5398 | |
d9d166c2 N |
5399 | if (mddev->level != LEVEL_NONE) |
5400 | request_module("md-level-%d", mddev->level); | |
5401 | else if (mddev->clevel[0]) | |
5402 | request_module("md-%s", mddev->clevel); | |
1da177e4 LT |
5403 | |
5404 | /* | |
5405 | * Drop all container device buffers, from now on | |
5406 | * the only valid external interface is through the md | |
5407 | * device. | |
1da177e4 | 5408 | */ |
dafb20fa | 5409 | rdev_for_each(rdev, mddev) { |
b2d444d7 | 5410 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
5411 | continue; |
5412 | sync_blockdev(rdev->bdev); | |
f98393a6 | 5413 | invalidate_bdev(rdev->bdev); |
97b20ef7 N |
5414 | if (mddev->ro != 1 && |
5415 | (bdev_read_only(rdev->bdev) || | |
5416 | bdev_read_only(rdev->meta_bdev))) { | |
5417 | mddev->ro = 1; | |
5418 | if (mddev->gendisk) | |
5419 | set_disk_ro(mddev->gendisk, 1); | |
5420 | } | |
f0d76d70 N |
5421 | |
5422 | /* perform some consistency tests on the device. | |
5423 | * We don't want the data to overlap the metadata, | |
58c0fed4 | 5424 | * Internal Bitmap issues have been handled elsewhere. |
f0d76d70 | 5425 | */ |
a6ff7e08 JB |
5426 | if (rdev->meta_bdev) { |
5427 | /* Nothing to check */; | |
5428 | } else if (rdev->data_offset < rdev->sb_start) { | |
58c0fed4 AN |
5429 | if (mddev->dev_sectors && |
5430 | rdev->data_offset + mddev->dev_sectors | |
0f420358 | 5431 | > rdev->sb_start) { |
9d48739e N |
5432 | pr_warn("md: %s: data overlaps metadata\n", |
5433 | mdname(mddev)); | |
f0d76d70 N |
5434 | return -EINVAL; |
5435 | } | |
5436 | } else { | |
0f420358 | 5437 | if (rdev->sb_start + rdev->sb_size/512 |
f0d76d70 | 5438 | > rdev->data_offset) { |
9d48739e N |
5439 | pr_warn("md: %s: metadata overlaps data\n", |
5440 | mdname(mddev)); | |
f0d76d70 N |
5441 | return -EINVAL; |
5442 | } | |
5443 | } | |
00bcb4ac | 5444 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
5445 | } |
5446 | ||
10273170 | 5447 | if (mddev->bio_set == NULL) { |
011067b0 | 5448 | mddev->bio_set = bioset_create(BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); |
10273170 ML |
5449 | if (!mddev->bio_set) |
5450 | return -ENOMEM; | |
5451 | } | |
5a85071c | 5452 | if (mddev->sync_set == NULL) { |
026d15f6 | 5453 | mddev->sync_set = bioset_create(BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); |
5a85071c N |
5454 | if (!mddev->sync_set) |
5455 | return -ENOMEM; | |
5456 | } | |
a167f663 | 5457 | |
1da177e4 | 5458 | spin_lock(&pers_lock); |
d9d166c2 | 5459 | pers = find_pers(mddev->level, mddev->clevel); |
2604b703 | 5460 | if (!pers || !try_module_get(pers->owner)) { |
1da177e4 | 5461 | spin_unlock(&pers_lock); |
d9d166c2 | 5462 | if (mddev->level != LEVEL_NONE) |
9d48739e N |
5463 | pr_warn("md: personality for level %d is not loaded!\n", |
5464 | mddev->level); | |
d9d166c2 | 5465 | else |
9d48739e N |
5466 | pr_warn("md: personality for level %s is not loaded!\n", |
5467 | mddev->clevel); | |
1da177e4 LT |
5468 | return -EINVAL; |
5469 | } | |
1da177e4 | 5470 | spin_unlock(&pers_lock); |
34817e8c N |
5471 | if (mddev->level != pers->level) { |
5472 | mddev->level = pers->level; | |
5473 | mddev->new_level = pers->level; | |
5474 | } | |
d9d166c2 | 5475 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
1da177e4 | 5476 | |
f6705578 | 5477 | if (mddev->reshape_position != MaxSector && |
63c70c4f | 5478 | pers->start_reshape == NULL) { |
f6705578 | 5479 | /* This personality cannot handle reshaping... */ |
f6705578 N |
5480 | module_put(pers->owner); |
5481 | return -EINVAL; | |
5482 | } | |
5483 | ||
7dd5e7c3 N |
5484 | if (pers->sync_request) { |
5485 | /* Warn if this is a potentially silly | |
5486 | * configuration. | |
5487 | */ | |
5488 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 5489 | struct md_rdev *rdev2; |
7dd5e7c3 | 5490 | int warned = 0; |
159ec1fc | 5491 | |
dafb20fa N |
5492 | rdev_for_each(rdev, mddev) |
5493 | rdev_for_each(rdev2, mddev) { | |
7dd5e7c3 N |
5494 | if (rdev < rdev2 && |
5495 | rdev->bdev->bd_contains == | |
5496 | rdev2->bdev->bd_contains) { | |
9d48739e N |
5497 | pr_warn("%s: WARNING: %s appears to be on the same physical disk as %s.\n", |
5498 | mdname(mddev), | |
5499 | bdevname(rdev->bdev,b), | |
5500 | bdevname(rdev2->bdev,b2)); | |
7dd5e7c3 N |
5501 | warned = 1; |
5502 | } | |
5503 | } | |
159ec1fc | 5504 | |
7dd5e7c3 | 5505 | if (warned) |
9d48739e | 5506 | pr_warn("True protection against single-disk failure might be compromised.\n"); |
7dd5e7c3 N |
5507 | } |
5508 | ||
657390d2 | 5509 | mddev->recovery = 0; |
58c0fed4 AN |
5510 | /* may be over-ridden by personality */ |
5511 | mddev->resync_max_sectors = mddev->dev_sectors; | |
5512 | ||
6ff8d8ec | 5513 | mddev->ok_start_degraded = start_dirty_degraded; |
1da177e4 | 5514 | |
0f9552b5 | 5515 | if (start_readonly && mddev->ro == 0) |
f91de92e N |
5516 | mddev->ro = 2; /* read-only, but switch on first write */ |
5517 | ||
a85dd7b8 SL |
5518 | /* |
5519 | * NOTE: some pers->run(), for example r5l_recovery_log(), wakes | |
5520 | * up mddev->thread. It is important to initialize critical | |
5521 | * resources for mddev->thread BEFORE calling pers->run(). | |
5522 | */ | |
36d091f4 | 5523 | err = pers->run(mddev); |
13e53df3 | 5524 | if (err) |
9d48739e | 5525 | pr_warn("md: pers->run() failed ...\n"); |
36d091f4 | 5526 | else if (pers->size(mddev, 0, 0) < mddev->array_sectors) { |
9d48739e N |
5527 | WARN_ONCE(!mddev->external_size, |
5528 | "%s: default size too small, but 'external_size' not in effect?\n", | |
5529 | __func__); | |
5530 | pr_warn("md: invalid array_size %llu > default size %llu\n", | |
5531 | (unsigned long long)mddev->array_sectors / 2, | |
5532 | (unsigned long long)pers->size(mddev, 0, 0) / 2); | |
b522adcd | 5533 | err = -EINVAL; |
b522adcd | 5534 | } |
36d091f4 | 5535 | if (err == 0 && pers->sync_request && |
ef99bf48 | 5536 | (mddev->bitmap_info.file || mddev->bitmap_info.offset)) { |
f9209a32 GR |
5537 | struct bitmap *bitmap; |
5538 | ||
5539 | bitmap = bitmap_create(mddev, -1); | |
5540 | if (IS_ERR(bitmap)) { | |
5541 | err = PTR_ERR(bitmap); | |
9d48739e N |
5542 | pr_warn("%s: failed to create bitmap (%d)\n", |
5543 | mdname(mddev), err); | |
f9209a32 GR |
5544 | } else |
5545 | mddev->bitmap = bitmap; | |
5546 | ||
b15c2e57 | 5547 | } |
1da177e4 | 5548 | if (err) { |
5aa61f42 | 5549 | mddev_detach(mddev); |
0c35bd47 N |
5550 | if (mddev->private) |
5551 | pers->free(mddev, mddev->private); | |
bd691922 | 5552 | mddev->private = NULL; |
36d091f4 | 5553 | module_put(pers->owner); |
32a7627c N |
5554 | bitmap_destroy(mddev); |
5555 | return err; | |
1da177e4 | 5556 | } |
5c675f83 | 5557 | if (mddev->queue) { |
bb086a89 SL |
5558 | bool nonrot = true; |
5559 | ||
5560 | rdev_for_each(rdev, mddev) { | |
5561 | if (rdev->raid_disk >= 0 && | |
5562 | !blk_queue_nonrot(bdev_get_queue(rdev->bdev))) { | |
5563 | nonrot = false; | |
5564 | break; | |
5565 | } | |
5566 | } | |
5567 | if (mddev->degraded) | |
5568 | nonrot = false; | |
5569 | if (nonrot) | |
5570 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, mddev->queue); | |
5571 | else | |
5572 | queue_flag_clear_unlocked(QUEUE_FLAG_NONROT, mddev->queue); | |
dc3b17cc JK |
5573 | mddev->queue->backing_dev_info->congested_data = mddev; |
5574 | mddev->queue->backing_dev_info->congested_fn = md_congested; | |
5c675f83 | 5575 | } |
36d091f4 | 5576 | if (pers->sync_request) { |
00bcb4ac N |
5577 | if (mddev->kobj.sd && |
5578 | sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
5579 | pr_warn("md: cannot register extra attributes for %s\n", |
5580 | mdname(mddev)); | |
00bcb4ac | 5581 | mddev->sysfs_action = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_action"); |
5e55e2f5 | 5582 | } else if (mddev->ro == 2) /* auto-readonly not meaningful */ |
fd9d49ca N |
5583 | mddev->ro = 0; |
5584 | ||
1e50915f RB |
5585 | atomic_set(&mddev->max_corr_read_errors, |
5586 | MD_DEFAULT_MAX_CORRECTED_READ_ERRORS); | |
1da177e4 | 5587 | mddev->safemode = 0; |
28c1b9fd GR |
5588 | if (mddev_is_clustered(mddev)) |
5589 | mddev->safemode_delay = 0; | |
5590 | else | |
5591 | mddev->safemode_delay = (200 * HZ)/1000 +1; /* 200 msec delay */ | |
1da177e4 | 5592 | mddev->in_sync = 1; |
0ca69886 | 5593 | smp_wmb(); |
36d091f4 N |
5594 | spin_lock(&mddev->lock); |
5595 | mddev->pers = pers; | |
36d091f4 | 5596 | spin_unlock(&mddev->lock); |
dafb20fa | 5597 | rdev_for_each(rdev, mddev) |
36fad858 NK |
5598 | if (rdev->raid_disk >= 0) |
5599 | if (sysfs_link_rdev(mddev, rdev)) | |
00bcb4ac | 5600 | /* failure here is OK */; |
f72ffdd6 | 5601 | |
a4a3d26d N |
5602 | if (mddev->degraded && !mddev->ro) |
5603 | /* This ensures that recovering status is reported immediately | |
5604 | * via sysfs - until a lack of spares is confirmed. | |
5605 | */ | |
5606 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
1da177e4 | 5607 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f72ffdd6 | 5608 | |
2953079c | 5609 | if (mddev->sb_flags) |
850b2b42 | 5610 | md_update_sb(mddev, 0); |
1da177e4 | 5611 | |
d7603b7e | 5612 | md_new_event(mddev); |
00bcb4ac N |
5613 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
5614 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
a99ac971 | 5615 | sysfs_notify(&mddev->kobj, NULL, "degraded"); |
1da177e4 LT |
5616 | return 0; |
5617 | } | |
390ee602 | 5618 | EXPORT_SYMBOL_GPL(md_run); |
1da177e4 | 5619 | |
fd01b88c | 5620 | static int do_md_run(struct mddev *mddev) |
fe60b014 N |
5621 | { |
5622 | int err; | |
5623 | ||
5624 | err = md_run(mddev); | |
5625 | if (err) | |
5626 | goto out; | |
69e51b44 N |
5627 | err = bitmap_load(mddev); |
5628 | if (err) { | |
5629 | bitmap_destroy(mddev); | |
5630 | goto out; | |
5631 | } | |
0fd018af | 5632 | |
28c1b9fd GR |
5633 | if (mddev_is_clustered(mddev)) |
5634 | md_allow_write(mddev); | |
5635 | ||
0fd018af JB |
5636 | md_wakeup_thread(mddev->thread); |
5637 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
5638 | ||
fe60b014 N |
5639 | set_capacity(mddev->gendisk, mddev->array_sectors); |
5640 | revalidate_disk(mddev->gendisk); | |
f0b4f7e2 | 5641 | mddev->changed = 1; |
fe60b014 N |
5642 | kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); |
5643 | out: | |
5644 | return err; | |
5645 | } | |
5646 | ||
fd01b88c | 5647 | static int restart_array(struct mddev *mddev) |
1da177e4 LT |
5648 | { |
5649 | struct gendisk *disk = mddev->gendisk; | |
97b20ef7 N |
5650 | struct md_rdev *rdev; |
5651 | bool has_journal = false; | |
5652 | bool has_readonly = false; | |
1da177e4 | 5653 | |
80fab1d7 | 5654 | /* Complain if it has no devices */ |
1da177e4 | 5655 | if (list_empty(&mddev->disks)) |
80fab1d7 AN |
5656 | return -ENXIO; |
5657 | if (!mddev->pers) | |
5658 | return -EINVAL; | |
5659 | if (!mddev->ro) | |
5660 | return -EBUSY; | |
339421de | 5661 | |
97b20ef7 N |
5662 | rcu_read_lock(); |
5663 | rdev_for_each_rcu(rdev, mddev) { | |
5664 | if (test_bit(Journal, &rdev->flags) && | |
5665 | !test_bit(Faulty, &rdev->flags)) | |
5666 | has_journal = true; | |
5667 | if (bdev_read_only(rdev->bdev)) | |
5668 | has_readonly = true; | |
5669 | } | |
5670 | rcu_read_unlock(); | |
5671 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags) && !has_journal) | |
339421de | 5672 | /* Don't restart rw with journal missing/faulty */ |
339421de | 5673 | return -EINVAL; |
97b20ef7 N |
5674 | if (has_readonly) |
5675 | return -EROFS; | |
339421de | 5676 | |
80fab1d7 AN |
5677 | mddev->safemode = 0; |
5678 | mddev->ro = 0; | |
5679 | set_disk_ro(disk, 0); | |
9d48739e | 5680 | pr_debug("md: %s switched to read-write mode.\n", mdname(mddev)); |
80fab1d7 AN |
5681 | /* Kick recovery or resync if necessary */ |
5682 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
5683 | md_wakeup_thread(mddev->thread); | |
5684 | md_wakeup_thread(mddev->sync_thread); | |
00bcb4ac | 5685 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
80fab1d7 | 5686 | return 0; |
1da177e4 LT |
5687 | } |
5688 | ||
fd01b88c | 5689 | static void md_clean(struct mddev *mddev) |
6177b472 N |
5690 | { |
5691 | mddev->array_sectors = 0; | |
5692 | mddev->external_size = 0; | |
5693 | mddev->dev_sectors = 0; | |
5694 | mddev->raid_disks = 0; | |
5695 | mddev->recovery_cp = 0; | |
5696 | mddev->resync_min = 0; | |
5697 | mddev->resync_max = MaxSector; | |
5698 | mddev->reshape_position = MaxSector; | |
5699 | mddev->external = 0; | |
5700 | mddev->persistent = 0; | |
5701 | mddev->level = LEVEL_NONE; | |
5702 | mddev->clevel[0] = 0; | |
5703 | mddev->flags = 0; | |
2953079c | 5704 | mddev->sb_flags = 0; |
6177b472 N |
5705 | mddev->ro = 0; |
5706 | mddev->metadata_type[0] = 0; | |
5707 | mddev->chunk_sectors = 0; | |
5708 | mddev->ctime = mddev->utime = 0; | |
5709 | mddev->layout = 0; | |
5710 | mddev->max_disks = 0; | |
5711 | mddev->events = 0; | |
a8707c08 | 5712 | mddev->can_decrease_events = 0; |
6177b472 | 5713 | mddev->delta_disks = 0; |
2c810cdd | 5714 | mddev->reshape_backwards = 0; |
6177b472 N |
5715 | mddev->new_level = LEVEL_NONE; |
5716 | mddev->new_layout = 0; | |
5717 | mddev->new_chunk_sectors = 0; | |
5718 | mddev->curr_resync = 0; | |
7f7583d4 | 5719 | atomic64_set(&mddev->resync_mismatches, 0); |
6177b472 N |
5720 | mddev->suspend_lo = mddev->suspend_hi = 0; |
5721 | mddev->sync_speed_min = mddev->sync_speed_max = 0; | |
5722 | mddev->recovery = 0; | |
5723 | mddev->in_sync = 0; | |
f0b4f7e2 | 5724 | mddev->changed = 0; |
6177b472 | 5725 | mddev->degraded = 0; |
6177b472 | 5726 | mddev->safemode = 0; |
bd691922 | 5727 | mddev->private = NULL; |
c20c33f0 | 5728 | mddev->cluster_info = NULL; |
6177b472 N |
5729 | mddev->bitmap_info.offset = 0; |
5730 | mddev->bitmap_info.default_offset = 0; | |
6409bb05 | 5731 | mddev->bitmap_info.default_space = 0; |
6177b472 N |
5732 | mddev->bitmap_info.chunksize = 0; |
5733 | mddev->bitmap_info.daemon_sleep = 0; | |
5734 | mddev->bitmap_info.max_write_behind = 0; | |
c20c33f0 | 5735 | mddev->bitmap_info.nodes = 0; |
6177b472 N |
5736 | } |
5737 | ||
fd01b88c | 5738 | static void __md_stop_writes(struct mddev *mddev) |
a047e125 | 5739 | { |
6b6204ee | 5740 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
f851b60d | 5741 | flush_workqueue(md_misc_wq); |
a047e125 | 5742 | if (mddev->sync_thread) { |
a047e125 | 5743 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
a91d5ac0 | 5744 | md_reap_sync_thread(mddev); |
a047e125 N |
5745 | } |
5746 | ||
5747 | del_timer_sync(&mddev->safemode_timer); | |
5748 | ||
034e33f5 SL |
5749 | if (mddev->pers && mddev->pers->quiesce) { |
5750 | mddev->pers->quiesce(mddev, 1); | |
5751 | mddev->pers->quiesce(mddev, 0); | |
5752 | } | |
a047e125 | 5753 | bitmap_flush(mddev); |
a047e125 | 5754 | |
b6d428c6 | 5755 | if (mddev->ro == 0 && |
28c1b9fd | 5756 | ((!mddev->in_sync && !mddev_is_clustered(mddev)) || |
2953079c | 5757 | mddev->sb_flags)) { |
a047e125 | 5758 | /* mark array as shutdown cleanly */ |
28c1b9fd GR |
5759 | if (!mddev_is_clustered(mddev)) |
5760 | mddev->in_sync = 1; | |
a047e125 N |
5761 | md_update_sb(mddev, 1); |
5762 | } | |
5763 | } | |
defad61a | 5764 | |
fd01b88c | 5765 | void md_stop_writes(struct mddev *mddev) |
defad61a | 5766 | { |
29f097c4 | 5767 | mddev_lock_nointr(mddev); |
defad61a N |
5768 | __md_stop_writes(mddev); |
5769 | mddev_unlock(mddev); | |
5770 | } | |
390ee602 | 5771 | EXPORT_SYMBOL_GPL(md_stop_writes); |
a047e125 | 5772 | |
5aa61f42 N |
5773 | static void mddev_detach(struct mddev *mddev) |
5774 | { | |
48df498d | 5775 | bitmap_wait_behind_writes(mddev); |
36d091f4 | 5776 | if (mddev->pers && mddev->pers->quiesce) { |
5aa61f42 N |
5777 | mddev->pers->quiesce(mddev, 1); |
5778 | mddev->pers->quiesce(mddev, 0); | |
5779 | } | |
5780 | md_unregister_thread(&mddev->thread); | |
5781 | if (mddev->queue) | |
5782 | blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ | |
5783 | } | |
5784 | ||
5eff3c43 | 5785 | static void __md_stop(struct mddev *mddev) |
6177b472 | 5786 | { |
36d091f4 | 5787 | struct md_personality *pers = mddev->pers; |
48df498d | 5788 | bitmap_destroy(mddev); |
5aa61f42 | 5789 | mddev_detach(mddev); |
ee5d004f N |
5790 | /* Ensure ->event_work is done */ |
5791 | flush_workqueue(md_misc_wq); | |
36d091f4 | 5792 | spin_lock(&mddev->lock); |
6177b472 | 5793 | mddev->pers = NULL; |
36d091f4 N |
5794 | spin_unlock(&mddev->lock); |
5795 | pers->free(mddev, mddev->private); | |
bd691922 | 5796 | mddev->private = NULL; |
36d091f4 N |
5797 | if (pers->sync_request && mddev->to_remove == NULL) |
5798 | mddev->to_remove = &md_redundancy_group; | |
5799 | module_put(pers->owner); | |
cca9cf90 | 5800 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
6177b472 | 5801 | } |
5eff3c43 N |
5802 | |
5803 | void md_stop(struct mddev *mddev) | |
5804 | { | |
5805 | /* stop the array and free an attached data structures. | |
5806 | * This is called from dm-raid | |
5807 | */ | |
5808 | __md_stop(mddev); | |
5eff3c43 N |
5809 | if (mddev->bio_set) |
5810 | bioset_free(mddev->bio_set); | |
5811 | } | |
5812 | ||
390ee602 | 5813 | EXPORT_SYMBOL_GPL(md_stop); |
6177b472 | 5814 | |
a05b7ea0 | 5815 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) |
a4bd82d0 N |
5816 | { |
5817 | int err = 0; | |
30b8feb7 N |
5818 | int did_freeze = 0; |
5819 | ||
5820 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
5821 | did_freeze = 1; | |
5822 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
5823 | md_wakeup_thread(mddev->thread); | |
5824 | } | |
f851b60d | 5825 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 5826 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 5827 | if (mddev->sync_thread) |
30b8feb7 N |
5828 | /* Thread might be blocked waiting for metadata update |
5829 | * which will now never happen */ | |
5830 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 5831 | |
2953079c | 5832 | if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
88724bfa | 5833 | return -EBUSY; |
30b8feb7 | 5834 | mddev_unlock(mddev); |
f851b60d N |
5835 | wait_event(resync_wait, !test_bit(MD_RECOVERY_RUNNING, |
5836 | &mddev->recovery)); | |
88724bfa | 5837 | wait_event(mddev->sb_wait, |
2953079c | 5838 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
30b8feb7 N |
5839 | mddev_lock_nointr(mddev); |
5840 | ||
a4bd82d0 | 5841 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 5842 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 | 5843 | mddev->sync_thread || |
af8d8e6f | 5844 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 5845 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
30b8feb7 N |
5846 | if (did_freeze) { |
5847 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 5848 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
5849 | md_wakeup_thread(mddev->thread); |
5850 | } | |
a4bd82d0 N |
5851 | err = -EBUSY; |
5852 | goto out; | |
5853 | } | |
5854 | if (mddev->pers) { | |
defad61a | 5855 | __md_stop_writes(mddev); |
a4bd82d0 N |
5856 | |
5857 | err = -ENXIO; | |
5858 | if (mddev->ro==1) | |
5859 | goto out; | |
5860 | mddev->ro = 1; | |
5861 | set_disk_ro(mddev->gendisk, 1); | |
5862 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d N |
5863 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
5864 | md_wakeup_thread(mddev->thread); | |
00bcb4ac | 5865 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
30b8feb7 | 5866 | err = 0; |
a4bd82d0 N |
5867 | } |
5868 | out: | |
5869 | mutex_unlock(&mddev->open_mutex); | |
5870 | return err; | |
5871 | } | |
5872 | ||
9e653b63 N |
5873 | /* mode: |
5874 | * 0 - completely stop and dis-assemble array | |
9e653b63 N |
5875 | * 2 - stop but do not disassemble array |
5876 | */ | |
f72ffdd6 | 5877 | static int do_md_stop(struct mddev *mddev, int mode, |
a05b7ea0 | 5878 | struct block_device *bdev) |
1da177e4 | 5879 | { |
1da177e4 | 5880 | struct gendisk *disk = mddev->gendisk; |
3cb03002 | 5881 | struct md_rdev *rdev; |
30b8feb7 N |
5882 | int did_freeze = 0; |
5883 | ||
5884 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
5885 | did_freeze = 1; | |
5886 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
5887 | md_wakeup_thread(mddev->thread); | |
5888 | } | |
f851b60d | 5889 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 5890 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 5891 | if (mddev->sync_thread) |
30b8feb7 N |
5892 | /* Thread might be blocked waiting for metadata update |
5893 | * which will now never happen */ | |
5894 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 5895 | |
30b8feb7 | 5896 | mddev_unlock(mddev); |
f851b60d N |
5897 | wait_event(resync_wait, (mddev->sync_thread == NULL && |
5898 | !test_bit(MD_RECOVERY_RUNNING, | |
5899 | &mddev->recovery))); | |
30b8feb7 | 5900 | mddev_lock_nointr(mddev); |
1da177e4 | 5901 | |
c8c00a69 | 5902 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 5903 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 N |
5904 | mddev->sysfs_active || |
5905 | mddev->sync_thread || | |
af8d8e6f | 5906 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 5907 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
6e17b027 | 5908 | mutex_unlock(&mddev->open_mutex); |
30b8feb7 N |
5909 | if (did_freeze) { |
5910 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 5911 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
5912 | md_wakeup_thread(mddev->thread); |
5913 | } | |
260fa034 N |
5914 | return -EBUSY; |
5915 | } | |
6e17b027 | 5916 | if (mddev->pers) { |
a4bd82d0 N |
5917 | if (mddev->ro) |
5918 | set_disk_ro(disk, 0); | |
409c57f3 | 5919 | |
defad61a | 5920 | __md_stop_writes(mddev); |
5eff3c43 | 5921 | __md_stop(mddev); |
dc3b17cc | 5922 | mddev->queue->backing_dev_info->congested_fn = NULL; |
6177b472 | 5923 | |
a4bd82d0 | 5924 | /* tell userspace to handle 'inactive' */ |
00bcb4ac | 5925 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0d4ca600 | 5926 | |
dafb20fa | 5927 | rdev_for_each(rdev, mddev) |
36fad858 NK |
5928 | if (rdev->raid_disk >= 0) |
5929 | sysfs_unlink_rdev(mddev, rdev); | |
c4647292 | 5930 | |
a4bd82d0 | 5931 | set_capacity(disk, 0); |
6e17b027 | 5932 | mutex_unlock(&mddev->open_mutex); |
f0b4f7e2 | 5933 | mddev->changed = 1; |
a4bd82d0 | 5934 | revalidate_disk(disk); |
0d4ca600 | 5935 | |
a4bd82d0 N |
5936 | if (mddev->ro) |
5937 | mddev->ro = 0; | |
6e17b027 N |
5938 | } else |
5939 | mutex_unlock(&mddev->open_mutex); | |
1da177e4 LT |
5940 | /* |
5941 | * Free resources if final stop | |
5942 | */ | |
9e653b63 | 5943 | if (mode == 0) { |
9d48739e | 5944 | pr_info("md: %s stopped.\n", mdname(mddev)); |
1da177e4 | 5945 | |
c3d9714e | 5946 | if (mddev->bitmap_info.file) { |
4af1a041 N |
5947 | struct file *f = mddev->bitmap_info.file; |
5948 | spin_lock(&mddev->lock); | |
c3d9714e | 5949 | mddev->bitmap_info.file = NULL; |
4af1a041 N |
5950 | spin_unlock(&mddev->lock); |
5951 | fput(f); | |
978f946b | 5952 | } |
c3d9714e | 5953 | mddev->bitmap_info.offset = 0; |
978f946b | 5954 | |
1da177e4 LT |
5955 | export_array(mddev); |
5956 | ||
6177b472 | 5957 | md_clean(mddev); |
efeb53c0 N |
5958 | if (mddev->hold_active == UNTIL_STOP) |
5959 | mddev->hold_active = 0; | |
a4bd82d0 | 5960 | } |
d7603b7e | 5961 | md_new_event(mddev); |
00bcb4ac | 5962 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6e17b027 | 5963 | return 0; |
1da177e4 LT |
5964 | } |
5965 | ||
fdee8ae4 | 5966 | #ifndef MODULE |
fd01b88c | 5967 | static void autorun_array(struct mddev *mddev) |
1da177e4 | 5968 | { |
3cb03002 | 5969 | struct md_rdev *rdev; |
1da177e4 LT |
5970 | int err; |
5971 | ||
a757e64c | 5972 | if (list_empty(&mddev->disks)) |
1da177e4 | 5973 | return; |
1da177e4 | 5974 | |
9d48739e | 5975 | pr_info("md: running: "); |
1da177e4 | 5976 | |
dafb20fa | 5977 | rdev_for_each(rdev, mddev) { |
1da177e4 | 5978 | char b[BDEVNAME_SIZE]; |
9d48739e | 5979 | pr_cont("<%s>", bdevname(rdev->bdev,b)); |
1da177e4 | 5980 | } |
9d48739e | 5981 | pr_cont("\n"); |
1da177e4 | 5982 | |
d710e138 | 5983 | err = do_md_run(mddev); |
1da177e4 | 5984 | if (err) { |
9d48739e | 5985 | pr_warn("md: do_md_run() returned %d\n", err); |
a05b7ea0 | 5986 | do_md_stop(mddev, 0, NULL); |
1da177e4 LT |
5987 | } |
5988 | } | |
5989 | ||
5990 | /* | |
5991 | * lets try to run arrays based on all disks that have arrived | |
5992 | * until now. (those are in pending_raid_disks) | |
5993 | * | |
5994 | * the method: pick the first pending disk, collect all disks with | |
5995 | * the same UUID, remove all from the pending list and put them into | |
5996 | * the 'same_array' list. Then order this list based on superblock | |
5997 | * update time (freshest comes first), kick out 'old' disks and | |
5998 | * compare superblocks. If everything's fine then run it. | |
5999 | * | |
6000 | * If "unit" is allocated, then bump its reference count | |
6001 | */ | |
6002 | static void autorun_devices(int part) | |
6003 | { | |
3cb03002 | 6004 | struct md_rdev *rdev0, *rdev, *tmp; |
fd01b88c | 6005 | struct mddev *mddev; |
1da177e4 LT |
6006 | char b[BDEVNAME_SIZE]; |
6007 | ||
9d48739e | 6008 | pr_info("md: autorun ...\n"); |
1da177e4 | 6009 | while (!list_empty(&pending_raid_disks)) { |
e8703fe1 | 6010 | int unit; |
1da177e4 | 6011 | dev_t dev; |
ad01c9e3 | 6012 | LIST_HEAD(candidates); |
1da177e4 | 6013 | rdev0 = list_entry(pending_raid_disks.next, |
3cb03002 | 6014 | struct md_rdev, same_set); |
1da177e4 | 6015 | |
9d48739e | 6016 | pr_debug("md: considering %s ...\n", bdevname(rdev0->bdev,b)); |
1da177e4 | 6017 | INIT_LIST_HEAD(&candidates); |
159ec1fc | 6018 | rdev_for_each_list(rdev, tmp, &pending_raid_disks) |
1da177e4 | 6019 | if (super_90_load(rdev, rdev0, 0) >= 0) { |
9d48739e N |
6020 | pr_debug("md: adding %s ...\n", |
6021 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
6022 | list_move(&rdev->same_set, &candidates); |
6023 | } | |
6024 | /* | |
6025 | * now we have a set of devices, with all of them having | |
6026 | * mostly sane superblocks. It's time to allocate the | |
6027 | * mddev. | |
6028 | */ | |
e8703fe1 N |
6029 | if (part) { |
6030 | dev = MKDEV(mdp_major, | |
6031 | rdev0->preferred_minor << MdpMinorShift); | |
6032 | unit = MINOR(dev) >> MdpMinorShift; | |
6033 | } else { | |
6034 | dev = MKDEV(MD_MAJOR, rdev0->preferred_minor); | |
6035 | unit = MINOR(dev); | |
6036 | } | |
6037 | if (rdev0->preferred_minor != unit) { | |
9d48739e N |
6038 | pr_warn("md: unit number in %s is bad: %d\n", |
6039 | bdevname(rdev0->bdev, b), rdev0->preferred_minor); | |
1da177e4 LT |
6040 | break; |
6041 | } | |
1da177e4 LT |
6042 | |
6043 | md_probe(dev, NULL, NULL); | |
6044 | mddev = mddev_find(dev); | |
9bbbca3a NB |
6045 | if (!mddev || !mddev->gendisk) { |
6046 | if (mddev) | |
6047 | mddev_put(mddev); | |
1da177e4 LT |
6048 | break; |
6049 | } | |
f72ffdd6 | 6050 | if (mddev_lock(mddev)) |
9d48739e | 6051 | pr_warn("md: %s locked, cannot run\n", mdname(mddev)); |
1da177e4 LT |
6052 | else if (mddev->raid_disks || mddev->major_version |
6053 | || !list_empty(&mddev->disks)) { | |
9d48739e | 6054 | pr_warn("md: %s already running, cannot run %s\n", |
1da177e4 LT |
6055 | mdname(mddev), bdevname(rdev0->bdev,b)); |
6056 | mddev_unlock(mddev); | |
6057 | } else { | |
9d48739e | 6058 | pr_debug("md: created %s\n", mdname(mddev)); |
1ec4a939 | 6059 | mddev->persistent = 1; |
159ec1fc | 6060 | rdev_for_each_list(rdev, tmp, &candidates) { |
1da177e4 LT |
6061 | list_del_init(&rdev->same_set); |
6062 | if (bind_rdev_to_array(rdev, mddev)) | |
6063 | export_rdev(rdev); | |
6064 | } | |
6065 | autorun_array(mddev); | |
6066 | mddev_unlock(mddev); | |
6067 | } | |
6068 | /* on success, candidates will be empty, on error | |
6069 | * it won't... | |
6070 | */ | |
159ec1fc | 6071 | rdev_for_each_list(rdev, tmp, &candidates) { |
4b80991c | 6072 | list_del_init(&rdev->same_set); |
1da177e4 | 6073 | export_rdev(rdev); |
4b80991c | 6074 | } |
1da177e4 LT |
6075 | mddev_put(mddev); |
6076 | } | |
9d48739e | 6077 | pr_info("md: ... autorun DONE.\n"); |
1da177e4 | 6078 | } |
fdee8ae4 | 6079 | #endif /* !MODULE */ |
1da177e4 | 6080 | |
f72ffdd6 | 6081 | static int get_version(void __user *arg) |
1da177e4 LT |
6082 | { |
6083 | mdu_version_t ver; | |
6084 | ||
6085 | ver.major = MD_MAJOR_VERSION; | |
6086 | ver.minor = MD_MINOR_VERSION; | |
6087 | ver.patchlevel = MD_PATCHLEVEL_VERSION; | |
6088 | ||
6089 | if (copy_to_user(arg, &ver, sizeof(ver))) | |
6090 | return -EFAULT; | |
6091 | ||
6092 | return 0; | |
6093 | } | |
6094 | ||
f72ffdd6 | 6095 | static int get_array_info(struct mddev *mddev, void __user *arg) |
1da177e4 LT |
6096 | { |
6097 | mdu_array_info_t info; | |
a9f326eb | 6098 | int nr,working,insync,failed,spare; |
3cb03002 | 6099 | struct md_rdev *rdev; |
1da177e4 | 6100 | |
1ca69c4b N |
6101 | nr = working = insync = failed = spare = 0; |
6102 | rcu_read_lock(); | |
6103 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 6104 | nr++; |
b2d444d7 | 6105 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
6106 | failed++; |
6107 | else { | |
6108 | working++; | |
b2d444d7 | 6109 | if (test_bit(In_sync, &rdev->flags)) |
f72ffdd6 | 6110 | insync++; |
b347af81 SL |
6111 | else if (test_bit(Journal, &rdev->flags)) |
6112 | /* TODO: add journal count to md_u.h */ | |
6113 | ; | |
1da177e4 LT |
6114 | else |
6115 | spare++; | |
6116 | } | |
6117 | } | |
1ca69c4b | 6118 | rcu_read_unlock(); |
1da177e4 LT |
6119 | |
6120 | info.major_version = mddev->major_version; | |
6121 | info.minor_version = mddev->minor_version; | |
6122 | info.patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6123 | info.ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 6124 | info.level = mddev->level; |
58c0fed4 AN |
6125 | info.size = mddev->dev_sectors / 2; |
6126 | if (info.size != mddev->dev_sectors / 2) /* overflow */ | |
284ae7ca | 6127 | info.size = -1; |
1da177e4 LT |
6128 | info.nr_disks = nr; |
6129 | info.raid_disks = mddev->raid_disks; | |
6130 | info.md_minor = mddev->md_minor; | |
6131 | info.not_persistent= !mddev->persistent; | |
6132 | ||
9ebc6ef1 | 6133 | info.utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
6134 | info.state = 0; |
6135 | if (mddev->in_sync) | |
6136 | info.state = (1<<MD_SB_CLEAN); | |
c3d9714e | 6137 | if (mddev->bitmap && mddev->bitmap_info.offset) |
9bd35920 | 6138 | info.state |= (1<<MD_SB_BITMAP_PRESENT); |
ca8895d9 GR |
6139 | if (mddev_is_clustered(mddev)) |
6140 | info.state |= (1<<MD_SB_CLUSTERED); | |
a9f326eb | 6141 | info.active_disks = insync; |
1da177e4 LT |
6142 | info.working_disks = working; |
6143 | info.failed_disks = failed; | |
6144 | info.spare_disks = spare; | |
6145 | ||
6146 | info.layout = mddev->layout; | |
9d8f0363 | 6147 | info.chunk_size = mddev->chunk_sectors << 9; |
1da177e4 LT |
6148 | |
6149 | if (copy_to_user(arg, &info, sizeof(info))) | |
6150 | return -EFAULT; | |
6151 | ||
6152 | return 0; | |
6153 | } | |
6154 | ||
f72ffdd6 | 6155 | static int get_bitmap_file(struct mddev *mddev, void __user * arg) |
32a7627c N |
6156 | { |
6157 | mdu_bitmap_file_t *file = NULL; /* too big for stack allocation */ | |
f4ad3d38 | 6158 | char *ptr; |
4af1a041 | 6159 | int err; |
32a7627c | 6160 | |
b6878d9e | 6161 | file = kzalloc(sizeof(*file), GFP_NOIO); |
32a7627c | 6162 | if (!file) |
4af1a041 | 6163 | return -ENOMEM; |
32a7627c | 6164 | |
4af1a041 N |
6165 | err = 0; |
6166 | spin_lock(&mddev->lock); | |
25eafe1a BR |
6167 | /* bitmap enabled */ |
6168 | if (mddev->bitmap_info.file) { | |
6169 | ptr = file_path(mddev->bitmap_info.file, file->pathname, | |
6170 | sizeof(file->pathname)); | |
6171 | if (IS_ERR(ptr)) | |
6172 | err = PTR_ERR(ptr); | |
6173 | else | |
6174 | memmove(file->pathname, ptr, | |
6175 | sizeof(file->pathname)-(ptr-file->pathname)); | |
6176 | } | |
4af1a041 | 6177 | spin_unlock(&mddev->lock); |
32a7627c | 6178 | |
4af1a041 N |
6179 | if (err == 0 && |
6180 | copy_to_user(arg, file, sizeof(*file))) | |
32a7627c | 6181 | err = -EFAULT; |
4af1a041 | 6182 | |
32a7627c N |
6183 | kfree(file); |
6184 | return err; | |
6185 | } | |
6186 | ||
f72ffdd6 | 6187 | static int get_disk_info(struct mddev *mddev, void __user * arg) |
1da177e4 LT |
6188 | { |
6189 | mdu_disk_info_t info; | |
3cb03002 | 6190 | struct md_rdev *rdev; |
1da177e4 LT |
6191 | |
6192 | if (copy_from_user(&info, arg, sizeof(info))) | |
6193 | return -EFAULT; | |
6194 | ||
1ca69c4b | 6195 | rcu_read_lock(); |
57d051dc | 6196 | rdev = md_find_rdev_nr_rcu(mddev, info.number); |
1da177e4 LT |
6197 | if (rdev) { |
6198 | info.major = MAJOR(rdev->bdev->bd_dev); | |
6199 | info.minor = MINOR(rdev->bdev->bd_dev); | |
6200 | info.raid_disk = rdev->raid_disk; | |
6201 | info.state = 0; | |
b2d444d7 | 6202 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 6203 | info.state |= (1<<MD_DISK_FAULTY); |
b2d444d7 | 6204 | else if (test_bit(In_sync, &rdev->flags)) { |
1da177e4 LT |
6205 | info.state |= (1<<MD_DISK_ACTIVE); |
6206 | info.state |= (1<<MD_DISK_SYNC); | |
6207 | } | |
9efdca16 | 6208 | if (test_bit(Journal, &rdev->flags)) |
bac624f3 | 6209 | info.state |= (1<<MD_DISK_JOURNAL); |
8ddf9efe N |
6210 | if (test_bit(WriteMostly, &rdev->flags)) |
6211 | info.state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
6212 | if (test_bit(FailFast, &rdev->flags)) |
6213 | info.state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 LT |
6214 | } else { |
6215 | info.major = info.minor = 0; | |
6216 | info.raid_disk = -1; | |
6217 | info.state = (1<<MD_DISK_REMOVED); | |
6218 | } | |
1ca69c4b | 6219 | rcu_read_unlock(); |
1da177e4 LT |
6220 | |
6221 | if (copy_to_user(arg, &info, sizeof(info))) | |
6222 | return -EFAULT; | |
6223 | ||
6224 | return 0; | |
6225 | } | |
6226 | ||
f72ffdd6 | 6227 | static int add_new_disk(struct mddev *mddev, mdu_disk_info_t *info) |
1da177e4 LT |
6228 | { |
6229 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 6230 | struct md_rdev *rdev; |
1da177e4 LT |
6231 | dev_t dev = MKDEV(info->major,info->minor); |
6232 | ||
1aee41f6 GR |
6233 | if (mddev_is_clustered(mddev) && |
6234 | !(info->state & ((1 << MD_DISK_CLUSTER_ADD) | (1 << MD_DISK_CANDIDATE)))) { | |
9d48739e N |
6235 | pr_warn("%s: Cannot add to clustered mddev.\n", |
6236 | mdname(mddev)); | |
1aee41f6 GR |
6237 | return -EINVAL; |
6238 | } | |
6239 | ||
1da177e4 LT |
6240 | if (info->major != MAJOR(dev) || info->minor != MINOR(dev)) |
6241 | return -EOVERFLOW; | |
6242 | ||
6243 | if (!mddev->raid_disks) { | |
6244 | int err; | |
6245 | /* expecting a device which has a superblock */ | |
6246 | rdev = md_import_device(dev, mddev->major_version, mddev->minor_version); | |
6247 | if (IS_ERR(rdev)) { | |
9d48739e | 6248 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6249 | PTR_ERR(rdev)); |
6250 | return PTR_ERR(rdev); | |
6251 | } | |
6252 | if (!list_empty(&mddev->disks)) { | |
3cb03002 N |
6253 | struct md_rdev *rdev0 |
6254 | = list_entry(mddev->disks.next, | |
6255 | struct md_rdev, same_set); | |
a9f326eb | 6256 | err = super_types[mddev->major_version] |
1da177e4 LT |
6257 | .load_super(rdev, rdev0, mddev->minor_version); |
6258 | if (err < 0) { | |
9d48739e | 6259 | pr_warn("md: %s has different UUID to %s\n", |
f72ffdd6 | 6260 | bdevname(rdev->bdev,b), |
1da177e4 LT |
6261 | bdevname(rdev0->bdev,b2)); |
6262 | export_rdev(rdev); | |
6263 | return -EINVAL; | |
6264 | } | |
6265 | } | |
6266 | err = bind_rdev_to_array(rdev, mddev); | |
6267 | if (err) | |
6268 | export_rdev(rdev); | |
6269 | return err; | |
6270 | } | |
6271 | ||
6272 | /* | |
6273 | * add_new_disk can be used once the array is assembled | |
6274 | * to add "hot spares". They must already have a superblock | |
6275 | * written | |
6276 | */ | |
6277 | if (mddev->pers) { | |
6278 | int err; | |
6279 | if (!mddev->pers->hot_add_disk) { | |
9d48739e N |
6280 | pr_warn("%s: personality does not support diskops!\n", |
6281 | mdname(mddev)); | |
1da177e4 LT |
6282 | return -EINVAL; |
6283 | } | |
7b1e35f6 N |
6284 | if (mddev->persistent) |
6285 | rdev = md_import_device(dev, mddev->major_version, | |
6286 | mddev->minor_version); | |
6287 | else | |
6288 | rdev = md_import_device(dev, -1, -1); | |
1da177e4 | 6289 | if (IS_ERR(rdev)) { |
9d48739e | 6290 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6291 | PTR_ERR(rdev)); |
6292 | return PTR_ERR(rdev); | |
6293 | } | |
1a855a06 | 6294 | /* set saved_raid_disk if appropriate */ |
41158c7e N |
6295 | if (!mddev->persistent) { |
6296 | if (info->state & (1<<MD_DISK_SYNC) && | |
bf572541 | 6297 | info->raid_disk < mddev->raid_disks) { |
41158c7e | 6298 | rdev->raid_disk = info->raid_disk; |
bf572541 | 6299 | set_bit(In_sync, &rdev->flags); |
8313b8e5 | 6300 | clear_bit(Bitmap_sync, &rdev->flags); |
bf572541 | 6301 | } else |
41158c7e | 6302 | rdev->raid_disk = -1; |
f466722c | 6303 | rdev->saved_raid_disk = rdev->raid_disk; |
41158c7e N |
6304 | } else |
6305 | super_types[mddev->major_version]. | |
6306 | validate_super(mddev, rdev); | |
bedd86b7 | 6307 | if ((info->state & (1<<MD_DISK_SYNC)) && |
f4563091 | 6308 | rdev->raid_disk != info->raid_disk) { |
bedd86b7 N |
6309 | /* This was a hot-add request, but events doesn't |
6310 | * match, so reject it. | |
6311 | */ | |
6312 | export_rdev(rdev); | |
6313 | return -EINVAL; | |
6314 | } | |
6315 | ||
b2d444d7 | 6316 | clear_bit(In_sync, &rdev->flags); /* just to be sure */ |
8ddf9efe N |
6317 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6318 | set_bit(WriteMostly, &rdev->flags); | |
575a80fa N |
6319 | else |
6320 | clear_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6321 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6322 | set_bit(FailFast, &rdev->flags); | |
6323 | else | |
6324 | clear_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6325 | |
f6b6ec5c SL |
6326 | if (info->state & (1<<MD_DISK_JOURNAL)) { |
6327 | struct md_rdev *rdev2; | |
6328 | bool has_journal = false; | |
6329 | ||
6330 | /* make sure no existing journal disk */ | |
6331 | rdev_for_each(rdev2, mddev) { | |
6332 | if (test_bit(Journal, &rdev2->flags)) { | |
6333 | has_journal = true; | |
6334 | break; | |
6335 | } | |
6336 | } | |
6337 | if (has_journal) { | |
6338 | export_rdev(rdev); | |
6339 | return -EBUSY; | |
6340 | } | |
bac624f3 | 6341 | set_bit(Journal, &rdev->flags); |
f6b6ec5c | 6342 | } |
1aee41f6 GR |
6343 | /* |
6344 | * check whether the device shows up in other nodes | |
6345 | */ | |
6346 | if (mddev_is_clustered(mddev)) { | |
dbb64f86 | 6347 | if (info->state & (1 << MD_DISK_CANDIDATE)) |
1aee41f6 | 6348 | set_bit(Candidate, &rdev->flags); |
dbb64f86 | 6349 | else if (info->state & (1 << MD_DISK_CLUSTER_ADD)) { |
1aee41f6 | 6350 | /* --add initiated by this node */ |
dbb64f86 | 6351 | err = md_cluster_ops->add_new_disk(mddev, rdev); |
1aee41f6 | 6352 | if (err) { |
1aee41f6 GR |
6353 | export_rdev(rdev); |
6354 | return err; | |
6355 | } | |
6356 | } | |
6357 | } | |
6358 | ||
1da177e4 LT |
6359 | rdev->raid_disk = -1; |
6360 | err = bind_rdev_to_array(rdev, mddev); | |
dbb64f86 | 6361 | |
1da177e4 LT |
6362 | if (err) |
6363 | export_rdev(rdev); | |
dbb64f86 GR |
6364 | |
6365 | if (mddev_is_clustered(mddev)) { | |
e566aef1 GJ |
6366 | if (info->state & (1 << MD_DISK_CANDIDATE)) { |
6367 | if (!err) { | |
6368 | err = md_cluster_ops->new_disk_ack(mddev, | |
6369 | err == 0); | |
6370 | if (err) | |
6371 | md_kick_rdev_from_array(rdev); | |
6372 | } | |
6373 | } else { | |
dbb64f86 GR |
6374 | if (err) |
6375 | md_cluster_ops->add_new_disk_cancel(mddev); | |
6376 | else | |
6377 | err = add_bound_rdev(rdev); | |
6378 | } | |
6379 | ||
6380 | } else if (!err) | |
a6da4ef8 | 6381 | err = add_bound_rdev(rdev); |
dbb64f86 | 6382 | |
1da177e4 LT |
6383 | return err; |
6384 | } | |
6385 | ||
6386 | /* otherwise, add_new_disk is only allowed | |
6387 | * for major_version==0 superblocks | |
6388 | */ | |
6389 | if (mddev->major_version != 0) { | |
9d48739e | 6390 | pr_warn("%s: ADD_NEW_DISK not supported\n", mdname(mddev)); |
1da177e4 LT |
6391 | return -EINVAL; |
6392 | } | |
6393 | ||
6394 | if (!(info->state & (1<<MD_DISK_FAULTY))) { | |
6395 | int err; | |
d710e138 | 6396 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6397 | if (IS_ERR(rdev)) { |
9d48739e | 6398 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6399 | PTR_ERR(rdev)); |
6400 | return PTR_ERR(rdev); | |
6401 | } | |
6402 | rdev->desc_nr = info->number; | |
6403 | if (info->raid_disk < mddev->raid_disks) | |
6404 | rdev->raid_disk = info->raid_disk; | |
6405 | else | |
6406 | rdev->raid_disk = -1; | |
6407 | ||
1da177e4 | 6408 | if (rdev->raid_disk < mddev->raid_disks) |
b2d444d7 N |
6409 | if (info->state & (1<<MD_DISK_SYNC)) |
6410 | set_bit(In_sync, &rdev->flags); | |
1da177e4 | 6411 | |
8ddf9efe N |
6412 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6413 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6414 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6415 | set_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6416 | |
1da177e4 | 6417 | if (!mddev->persistent) { |
9d48739e | 6418 | pr_debug("md: nonpersistent superblock ...\n"); |
77304d2a MS |
6419 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
6420 | } else | |
57b2caa3 | 6421 | rdev->sb_start = calc_dev_sboffset(rdev); |
8190e754 | 6422 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6423 | |
2bf071bf N |
6424 | err = bind_rdev_to_array(rdev, mddev); |
6425 | if (err) { | |
6426 | export_rdev(rdev); | |
6427 | return err; | |
6428 | } | |
1da177e4 LT |
6429 | } |
6430 | ||
6431 | return 0; | |
6432 | } | |
6433 | ||
f72ffdd6 | 6434 | static int hot_remove_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6435 | { |
6436 | char b[BDEVNAME_SIZE]; | |
3cb03002 | 6437 | struct md_rdev *rdev; |
1da177e4 | 6438 | |
1da177e4 LT |
6439 | rdev = find_rdev(mddev, dev); |
6440 | if (!rdev) | |
6441 | return -ENXIO; | |
6442 | ||
2910ff17 GR |
6443 | if (rdev->raid_disk < 0) |
6444 | goto kick_rdev; | |
293467aa | 6445 | |
3ea8929d N |
6446 | clear_bit(Blocked, &rdev->flags); |
6447 | remove_and_add_spares(mddev, rdev); | |
6448 | ||
1da177e4 LT |
6449 | if (rdev->raid_disk >= 0) |
6450 | goto busy; | |
6451 | ||
2910ff17 | 6452 | kick_rdev: |
54a88392 | 6453 | if (mddev_is_clustered(mddev)) |
88bcfef7 GR |
6454 | md_cluster_ops->remove_disk(mddev, rdev); |
6455 | ||
fb56dfef | 6456 | md_kick_rdev_from_array(rdev); |
2953079c | 6457 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6458 | if (mddev->thread) |
6459 | md_wakeup_thread(mddev->thread); | |
6460 | else | |
6461 | md_update_sb(mddev, 1); | |
d7603b7e | 6462 | md_new_event(mddev); |
1da177e4 LT |
6463 | |
6464 | return 0; | |
6465 | busy: | |
9d48739e N |
6466 | pr_debug("md: cannot remove active disk %s from %s ...\n", |
6467 | bdevname(rdev->bdev,b), mdname(mddev)); | |
1da177e4 LT |
6468 | return -EBUSY; |
6469 | } | |
6470 | ||
f72ffdd6 | 6471 | static int hot_add_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6472 | { |
6473 | char b[BDEVNAME_SIZE]; | |
6474 | int err; | |
3cb03002 | 6475 | struct md_rdev *rdev; |
1da177e4 LT |
6476 | |
6477 | if (!mddev->pers) | |
6478 | return -ENODEV; | |
6479 | ||
6480 | if (mddev->major_version != 0) { | |
9d48739e | 6481 | pr_warn("%s: HOT_ADD may only be used with version-0 superblocks.\n", |
1da177e4 LT |
6482 | mdname(mddev)); |
6483 | return -EINVAL; | |
6484 | } | |
6485 | if (!mddev->pers->hot_add_disk) { | |
9d48739e | 6486 | pr_warn("%s: personality does not support diskops!\n", |
1da177e4 LT |
6487 | mdname(mddev)); |
6488 | return -EINVAL; | |
6489 | } | |
6490 | ||
d710e138 | 6491 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6492 | if (IS_ERR(rdev)) { |
9d48739e | 6493 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6494 | PTR_ERR(rdev)); |
6495 | return -EINVAL; | |
6496 | } | |
6497 | ||
6498 | if (mddev->persistent) | |
57b2caa3 | 6499 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 6500 | else |
77304d2a | 6501 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
1da177e4 | 6502 | |
8190e754 | 6503 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6504 | |
b2d444d7 | 6505 | if (test_bit(Faulty, &rdev->flags)) { |
9d48739e | 6506 | pr_warn("md: can not hot-add faulty %s disk to %s!\n", |
1da177e4 LT |
6507 | bdevname(rdev->bdev,b), mdname(mddev)); |
6508 | err = -EINVAL; | |
6509 | goto abort_export; | |
6510 | } | |
293467aa | 6511 | |
b2d444d7 | 6512 | clear_bit(In_sync, &rdev->flags); |
1da177e4 | 6513 | rdev->desc_nr = -1; |
5842730d | 6514 | rdev->saved_raid_disk = -1; |
2bf071bf N |
6515 | err = bind_rdev_to_array(rdev, mddev); |
6516 | if (err) | |
2aa82191 | 6517 | goto abort_export; |
1da177e4 LT |
6518 | |
6519 | /* | |
6520 | * The rest should better be atomic, we can have disk failures | |
6521 | * noticed in interrupt contexts ... | |
6522 | */ | |
6523 | ||
1da177e4 LT |
6524 | rdev->raid_disk = -1; |
6525 | ||
2953079c | 6526 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6527 | if (!mddev->thread) |
6528 | md_update_sb(mddev, 1); | |
1da177e4 LT |
6529 | /* |
6530 | * Kick recovery, maybe this spare has to be added to the | |
6531 | * array immediately. | |
6532 | */ | |
6533 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6534 | md_wakeup_thread(mddev->thread); | |
d7603b7e | 6535 | md_new_event(mddev); |
1da177e4 LT |
6536 | return 0; |
6537 | ||
1da177e4 LT |
6538 | abort_export: |
6539 | export_rdev(rdev); | |
6540 | return err; | |
6541 | } | |
6542 | ||
fd01b88c | 6543 | static int set_bitmap_file(struct mddev *mddev, int fd) |
32a7627c | 6544 | { |
035328c2 | 6545 | int err = 0; |
32a7627c | 6546 | |
36fa3063 | 6547 | if (mddev->pers) { |
d66b1b39 | 6548 | if (!mddev->pers->quiesce || !mddev->thread) |
36fa3063 N |
6549 | return -EBUSY; |
6550 | if (mddev->recovery || mddev->sync_thread) | |
6551 | return -EBUSY; | |
6552 | /* we should be able to change the bitmap.. */ | |
6553 | } | |
32a7627c | 6554 | |
36fa3063 | 6555 | if (fd >= 0) { |
035328c2 | 6556 | struct inode *inode; |
1e594bb2 N |
6557 | struct file *f; |
6558 | ||
6559 | if (mddev->bitmap || mddev->bitmap_info.file) | |
36fa3063 | 6560 | return -EEXIST; /* cannot add when bitmap is present */ |
1e594bb2 | 6561 | f = fget(fd); |
32a7627c | 6562 | |
1e594bb2 | 6563 | if (f == NULL) { |
9d48739e N |
6564 | pr_warn("%s: error: failed to get bitmap file\n", |
6565 | mdname(mddev)); | |
36fa3063 N |
6566 | return -EBADF; |
6567 | } | |
6568 | ||
1e594bb2 | 6569 | inode = f->f_mapping->host; |
035328c2 | 6570 | if (!S_ISREG(inode->i_mode)) { |
9d48739e N |
6571 | pr_warn("%s: error: bitmap file must be a regular file\n", |
6572 | mdname(mddev)); | |
035328c2 | 6573 | err = -EBADF; |
1e594bb2 | 6574 | } else if (!(f->f_mode & FMODE_WRITE)) { |
9d48739e N |
6575 | pr_warn("%s: error: bitmap file must open for write\n", |
6576 | mdname(mddev)); | |
035328c2 N |
6577 | err = -EBADF; |
6578 | } else if (atomic_read(&inode->i_writecount) != 1) { | |
9d48739e N |
6579 | pr_warn("%s: error: bitmap file is already in use\n", |
6580 | mdname(mddev)); | |
035328c2 N |
6581 | err = -EBUSY; |
6582 | } | |
6583 | if (err) { | |
1e594bb2 | 6584 | fput(f); |
36fa3063 N |
6585 | return err; |
6586 | } | |
1e594bb2 | 6587 | mddev->bitmap_info.file = f; |
c3d9714e | 6588 | mddev->bitmap_info.offset = 0; /* file overrides offset */ |
36fa3063 N |
6589 | } else if (mddev->bitmap == NULL) |
6590 | return -ENOENT; /* cannot remove what isn't there */ | |
6591 | err = 0; | |
6592 | if (mddev->pers) { | |
6593 | mddev->pers->quiesce(mddev, 1); | |
69e51b44 | 6594 | if (fd >= 0) { |
f9209a32 GR |
6595 | struct bitmap *bitmap; |
6596 | ||
6597 | bitmap = bitmap_create(mddev, -1); | |
6598 | if (!IS_ERR(bitmap)) { | |
6599 | mddev->bitmap = bitmap; | |
69e51b44 | 6600 | err = bitmap_load(mddev); |
ba599aca N |
6601 | } else |
6602 | err = PTR_ERR(bitmap); | |
69e51b44 | 6603 | } |
d7375ab3 | 6604 | if (fd < 0 || err) { |
36fa3063 | 6605 | bitmap_destroy(mddev); |
d7375ab3 N |
6606 | fd = -1; /* make sure to put the file */ |
6607 | } | |
36fa3063 | 6608 | mddev->pers->quiesce(mddev, 0); |
d7375ab3 N |
6609 | } |
6610 | if (fd < 0) { | |
4af1a041 N |
6611 | struct file *f = mddev->bitmap_info.file; |
6612 | if (f) { | |
6613 | spin_lock(&mddev->lock); | |
6614 | mddev->bitmap_info.file = NULL; | |
6615 | spin_unlock(&mddev->lock); | |
6616 | fput(f); | |
6617 | } | |
36fa3063 N |
6618 | } |
6619 | ||
32a7627c N |
6620 | return err; |
6621 | } | |
6622 | ||
1da177e4 LT |
6623 | /* |
6624 | * set_array_info is used two different ways | |
6625 | * The original usage is when creating a new array. | |
6626 | * In this usage, raid_disks is > 0 and it together with | |
6627 | * level, size, not_persistent,layout,chunksize determine the | |
6628 | * shape of the array. | |
6629 | * This will always create an array with a type-0.90.0 superblock. | |
6630 | * The newer usage is when assembling an array. | |
6631 | * In this case raid_disks will be 0, and the major_version field is | |
6632 | * use to determine which style super-blocks are to be found on the devices. | |
6633 | * The minor and patch _version numbers are also kept incase the | |
6634 | * super_block handler wishes to interpret them. | |
6635 | */ | |
f72ffdd6 | 6636 | static int set_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
6637 | { |
6638 | ||
6639 | if (info->raid_disks == 0) { | |
6640 | /* just setting version number for superblock loading */ | |
6641 | if (info->major_version < 0 || | |
50511da3 | 6642 | info->major_version >= ARRAY_SIZE(super_types) || |
1da177e4 LT |
6643 | super_types[info->major_version].name == NULL) { |
6644 | /* maybe try to auto-load a module? */ | |
9d48739e | 6645 | pr_warn("md: superblock version %d not known\n", |
1da177e4 LT |
6646 | info->major_version); |
6647 | return -EINVAL; | |
6648 | } | |
6649 | mddev->major_version = info->major_version; | |
6650 | mddev->minor_version = info->minor_version; | |
6651 | mddev->patch_version = info->patch_version; | |
3f9d7b0d | 6652 | mddev->persistent = !info->not_persistent; |
cbd19983 N |
6653 | /* ensure mddev_put doesn't delete this now that there |
6654 | * is some minimal configuration. | |
6655 | */ | |
9ebc6ef1 | 6656 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
6657 | return 0; |
6658 | } | |
6659 | mddev->major_version = MD_MAJOR_VERSION; | |
6660 | mddev->minor_version = MD_MINOR_VERSION; | |
6661 | mddev->patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6662 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
6663 | |
6664 | mddev->level = info->level; | |
17115e03 | 6665 | mddev->clevel[0] = 0; |
58c0fed4 | 6666 | mddev->dev_sectors = 2 * (sector_t)info->size; |
1da177e4 LT |
6667 | mddev->raid_disks = info->raid_disks; |
6668 | /* don't set md_minor, it is determined by which /dev/md* was | |
6669 | * openned | |
6670 | */ | |
6671 | if (info->state & (1<<MD_SB_CLEAN)) | |
6672 | mddev->recovery_cp = MaxSector; | |
6673 | else | |
6674 | mddev->recovery_cp = 0; | |
6675 | mddev->persistent = ! info->not_persistent; | |
e691063a | 6676 | mddev->external = 0; |
1da177e4 LT |
6677 | |
6678 | mddev->layout = info->layout; | |
9d8f0363 | 6679 | mddev->chunk_sectors = info->chunk_size >> 9; |
1da177e4 | 6680 | |
2953079c | 6681 | if (mddev->persistent) { |
1b3bae49 N |
6682 | mddev->max_disks = MD_SB_DISKS; |
6683 | mddev->flags = 0; | |
6684 | mddev->sb_flags = 0; | |
2953079c SL |
6685 | } |
6686 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
1da177e4 | 6687 | |
c3d9714e | 6688 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 6689 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
c3d9714e | 6690 | mddev->bitmap_info.offset = 0; |
b2a2703c | 6691 | |
f6705578 N |
6692 | mddev->reshape_position = MaxSector; |
6693 | ||
1da177e4 LT |
6694 | /* |
6695 | * Generate a 128 bit UUID | |
6696 | */ | |
6697 | get_random_bytes(mddev->uuid, 16); | |
6698 | ||
f6705578 | 6699 | mddev->new_level = mddev->level; |
664e7c41 | 6700 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
6701 | mddev->new_layout = mddev->layout; |
6702 | mddev->delta_disks = 0; | |
2c810cdd | 6703 | mddev->reshape_backwards = 0; |
f6705578 | 6704 | |
1da177e4 LT |
6705 | return 0; |
6706 | } | |
6707 | ||
fd01b88c | 6708 | void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors) |
1f403624 | 6709 | { |
b522adcd DW |
6710 | WARN(!mddev_is_locked(mddev), "%s: unlocked mddev!\n", __func__); |
6711 | ||
6712 | if (mddev->external_size) | |
6713 | return; | |
6714 | ||
1f403624 DW |
6715 | mddev->array_sectors = array_sectors; |
6716 | } | |
6717 | EXPORT_SYMBOL(md_set_array_sectors); | |
6718 | ||
fd01b88c | 6719 | static int update_size(struct mddev *mddev, sector_t num_sectors) |
a35b0d69 | 6720 | { |
3cb03002 | 6721 | struct md_rdev *rdev; |
a35b0d69 | 6722 | int rv; |
d71f9f88 | 6723 | int fit = (num_sectors == 0); |
818da59f | 6724 | sector_t old_dev_sectors = mddev->dev_sectors; |
ab5a98b1 | 6725 | |
a35b0d69 N |
6726 | if (mddev->pers->resize == NULL) |
6727 | return -EINVAL; | |
d71f9f88 AN |
6728 | /* The "num_sectors" is the number of sectors of each device that |
6729 | * is used. This can only make sense for arrays with redundancy. | |
6730 | * linear and raid0 always use whatever space is available. We can only | |
6731 | * consider changing this number if no resync or reconstruction is | |
6732 | * happening, and if the new size is acceptable. It must fit before the | |
0f420358 | 6733 | * sb_start or, if that is <data_offset, it must fit before the size |
d71f9f88 AN |
6734 | * of each device. If num_sectors is zero, we find the largest size |
6735 | * that fits. | |
a35b0d69 | 6736 | */ |
f851b60d N |
6737 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
6738 | mddev->sync_thread) | |
a35b0d69 | 6739 | return -EBUSY; |
bd8839e0 N |
6740 | if (mddev->ro) |
6741 | return -EROFS; | |
a4a6125a | 6742 | |
dafb20fa | 6743 | rdev_for_each(rdev, mddev) { |
dd8ac336 | 6744 | sector_t avail = rdev->sectors; |
01ab5662 | 6745 | |
d71f9f88 AN |
6746 | if (fit && (num_sectors == 0 || num_sectors > avail)) |
6747 | num_sectors = avail; | |
6748 | if (avail < num_sectors) | |
a35b0d69 N |
6749 | return -ENOSPC; |
6750 | } | |
d71f9f88 | 6751 | rv = mddev->pers->resize(mddev, num_sectors); |
c9483634 | 6752 | if (!rv) { |
818da59f GJ |
6753 | if (mddev_is_clustered(mddev)) |
6754 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
6755 | else if (mddev->queue) { | |
c9483634 GJ |
6756 | set_capacity(mddev->gendisk, mddev->array_sectors); |
6757 | revalidate_disk(mddev->gendisk); | |
6758 | } | |
6759 | } | |
a35b0d69 N |
6760 | return rv; |
6761 | } | |
6762 | ||
fd01b88c | 6763 | static int update_raid_disks(struct mddev *mddev, int raid_disks) |
da943b99 N |
6764 | { |
6765 | int rv; | |
c6563a8c | 6766 | struct md_rdev *rdev; |
da943b99 | 6767 | /* change the number of raid disks */ |
63c70c4f | 6768 | if (mddev->pers->check_reshape == NULL) |
da943b99 | 6769 | return -EINVAL; |
bd8839e0 N |
6770 | if (mddev->ro) |
6771 | return -EROFS; | |
da943b99 | 6772 | if (raid_disks <= 0 || |
233fca36 | 6773 | (mddev->max_disks && raid_disks >= mddev->max_disks)) |
da943b99 | 6774 | return -EINVAL; |
f851b60d N |
6775 | if (mddev->sync_thread || |
6776 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || | |
6777 | mddev->reshape_position != MaxSector) | |
da943b99 | 6778 | return -EBUSY; |
c6563a8c N |
6779 | |
6780 | rdev_for_each(rdev, mddev) { | |
6781 | if (mddev->raid_disks < raid_disks && | |
6782 | rdev->data_offset < rdev->new_data_offset) | |
6783 | return -EINVAL; | |
6784 | if (mddev->raid_disks > raid_disks && | |
6785 | rdev->data_offset > rdev->new_data_offset) | |
6786 | return -EINVAL; | |
6787 | } | |
6788 | ||
63c70c4f | 6789 | mddev->delta_disks = raid_disks - mddev->raid_disks; |
2c810cdd N |
6790 | if (mddev->delta_disks < 0) |
6791 | mddev->reshape_backwards = 1; | |
6792 | else if (mddev->delta_disks > 0) | |
6793 | mddev->reshape_backwards = 0; | |
63c70c4f N |
6794 | |
6795 | rv = mddev->pers->check_reshape(mddev); | |
2c810cdd | 6796 | if (rv < 0) { |
de171cb9 | 6797 | mddev->delta_disks = 0; |
2c810cdd N |
6798 | mddev->reshape_backwards = 0; |
6799 | } | |
da943b99 N |
6800 | return rv; |
6801 | } | |
6802 | ||
1da177e4 LT |
6803 | /* |
6804 | * update_array_info is used to change the configuration of an | |
6805 | * on-line array. | |
6806 | * The version, ctime,level,size,raid_disks,not_persistent, layout,chunk_size | |
6807 | * fields in the info are checked against the array. | |
6808 | * Any differences that cannot be handled will cause an error. | |
6809 | * Normally, only one change can be managed at a time. | |
6810 | */ | |
fd01b88c | 6811 | static int update_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
6812 | { |
6813 | int rv = 0; | |
6814 | int cnt = 0; | |
36fa3063 N |
6815 | int state = 0; |
6816 | ||
6817 | /* calculate expected state,ignoring low bits */ | |
c3d9714e | 6818 | if (mddev->bitmap && mddev->bitmap_info.offset) |
36fa3063 | 6819 | state |= (1 << MD_SB_BITMAP_PRESENT); |
1da177e4 LT |
6820 | |
6821 | if (mddev->major_version != info->major_version || | |
6822 | mddev->minor_version != info->minor_version || | |
6823 | /* mddev->patch_version != info->patch_version || */ | |
6824 | mddev->ctime != info->ctime || | |
6825 | mddev->level != info->level || | |
6826 | /* mddev->layout != info->layout || */ | |
4e023612 | 6827 | mddev->persistent != !info->not_persistent || |
9d8f0363 | 6828 | mddev->chunk_sectors != info->chunk_size >> 9 || |
36fa3063 N |
6829 | /* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */ |
6830 | ((state^info->state) & 0xfffffe00) | |
6831 | ) | |
1da177e4 LT |
6832 | return -EINVAL; |
6833 | /* Check there is only one change */ | |
58c0fed4 AN |
6834 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
6835 | cnt++; | |
6836 | if (mddev->raid_disks != info->raid_disks) | |
6837 | cnt++; | |
6838 | if (mddev->layout != info->layout) | |
6839 | cnt++; | |
6840 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) | |
6841 | cnt++; | |
6842 | if (cnt == 0) | |
6843 | return 0; | |
6844 | if (cnt > 1) | |
6845 | return -EINVAL; | |
1da177e4 LT |
6846 | |
6847 | if (mddev->layout != info->layout) { | |
6848 | /* Change layout | |
6849 | * we don't need to do anything at the md level, the | |
6850 | * personality will take care of it all. | |
6851 | */ | |
50ac168a | 6852 | if (mddev->pers->check_reshape == NULL) |
1da177e4 | 6853 | return -EINVAL; |
597a711b N |
6854 | else { |
6855 | mddev->new_layout = info->layout; | |
50ac168a | 6856 | rv = mddev->pers->check_reshape(mddev); |
597a711b N |
6857 | if (rv) |
6858 | mddev->new_layout = mddev->layout; | |
6859 | return rv; | |
6860 | } | |
1da177e4 | 6861 | } |
58c0fed4 | 6862 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
d71f9f88 | 6863 | rv = update_size(mddev, (sector_t)info->size * 2); |
a35b0d69 | 6864 | |
da943b99 N |
6865 | if (mddev->raid_disks != info->raid_disks) |
6866 | rv = update_raid_disks(mddev, info->raid_disks); | |
6867 | ||
36fa3063 | 6868 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) { |
293467aa GR |
6869 | if (mddev->pers->quiesce == NULL || mddev->thread == NULL) { |
6870 | rv = -EINVAL; | |
6871 | goto err; | |
6872 | } | |
6873 | if (mddev->recovery || mddev->sync_thread) { | |
6874 | rv = -EBUSY; | |
6875 | goto err; | |
6876 | } | |
36fa3063 | 6877 | if (info->state & (1<<MD_SB_BITMAP_PRESENT)) { |
f9209a32 | 6878 | struct bitmap *bitmap; |
36fa3063 | 6879 | /* add the bitmap */ |
293467aa GR |
6880 | if (mddev->bitmap) { |
6881 | rv = -EEXIST; | |
6882 | goto err; | |
6883 | } | |
6884 | if (mddev->bitmap_info.default_offset == 0) { | |
6885 | rv = -EINVAL; | |
6886 | goto err; | |
6887 | } | |
c3d9714e N |
6888 | mddev->bitmap_info.offset = |
6889 | mddev->bitmap_info.default_offset; | |
6409bb05 N |
6890 | mddev->bitmap_info.space = |
6891 | mddev->bitmap_info.default_space; | |
36fa3063 | 6892 | mddev->pers->quiesce(mddev, 1); |
f9209a32 GR |
6893 | bitmap = bitmap_create(mddev, -1); |
6894 | if (!IS_ERR(bitmap)) { | |
6895 | mddev->bitmap = bitmap; | |
69e51b44 | 6896 | rv = bitmap_load(mddev); |
ba599aca N |
6897 | } else |
6898 | rv = PTR_ERR(bitmap); | |
36fa3063 N |
6899 | if (rv) |
6900 | bitmap_destroy(mddev); | |
6901 | mddev->pers->quiesce(mddev, 0); | |
6902 | } else { | |
6903 | /* remove the bitmap */ | |
293467aa GR |
6904 | if (!mddev->bitmap) { |
6905 | rv = -ENOENT; | |
6906 | goto err; | |
6907 | } | |
6908 | if (mddev->bitmap->storage.file) { | |
6909 | rv = -EINVAL; | |
6910 | goto err; | |
6911 | } | |
f6a2dc64 GJ |
6912 | if (mddev->bitmap_info.nodes) { |
6913 | /* hold PW on all the bitmap lock */ | |
6914 | if (md_cluster_ops->lock_all_bitmaps(mddev) <= 0) { | |
9d48739e | 6915 | pr_warn("md: can't change bitmap to none since the array is in use by more than one node\n"); |
f6a2dc64 GJ |
6916 | rv = -EPERM; |
6917 | md_cluster_ops->unlock_all_bitmaps(mddev); | |
6918 | goto err; | |
6919 | } | |
6920 | ||
6921 | mddev->bitmap_info.nodes = 0; | |
6922 | md_cluster_ops->leave(mddev); | |
6923 | } | |
36fa3063 N |
6924 | mddev->pers->quiesce(mddev, 1); |
6925 | bitmap_destroy(mddev); | |
6926 | mddev->pers->quiesce(mddev, 0); | |
c3d9714e | 6927 | mddev->bitmap_info.offset = 0; |
36fa3063 N |
6928 | } |
6929 | } | |
850b2b42 | 6930 | md_update_sb(mddev, 1); |
293467aa GR |
6931 | return rv; |
6932 | err: | |
1da177e4 LT |
6933 | return rv; |
6934 | } | |
6935 | ||
fd01b88c | 6936 | static int set_disk_faulty(struct mddev *mddev, dev_t dev) |
1da177e4 | 6937 | { |
3cb03002 | 6938 | struct md_rdev *rdev; |
1ca69c4b | 6939 | int err = 0; |
1da177e4 LT |
6940 | |
6941 | if (mddev->pers == NULL) | |
6942 | return -ENODEV; | |
6943 | ||
1ca69c4b N |
6944 | rcu_read_lock(); |
6945 | rdev = find_rdev_rcu(mddev, dev); | |
1da177e4 | 6946 | if (!rdev) |
1ca69c4b N |
6947 | err = -ENODEV; |
6948 | else { | |
6949 | md_error(mddev, rdev); | |
6950 | if (!test_bit(Faulty, &rdev->flags)) | |
6951 | err = -EBUSY; | |
6952 | } | |
6953 | rcu_read_unlock(); | |
6954 | return err; | |
1da177e4 LT |
6955 | } |
6956 | ||
2f9618ce AN |
6957 | /* |
6958 | * We have a problem here : there is no easy way to give a CHS | |
6959 | * virtual geometry. We currently pretend that we have a 2 heads | |
6960 | * 4 sectors (with a BIG number of cylinders...). This drives | |
6961 | * dosfs just mad... ;-) | |
6962 | */ | |
a885c8c4 CH |
6963 | static int md_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
6964 | { | |
fd01b88c | 6965 | struct mddev *mddev = bdev->bd_disk->private_data; |
a885c8c4 CH |
6966 | |
6967 | geo->heads = 2; | |
6968 | geo->sectors = 4; | |
49ce6cea | 6969 | geo->cylinders = mddev->array_sectors / 8; |
a885c8c4 CH |
6970 | return 0; |
6971 | } | |
6972 | ||
cb335f88 NS |
6973 | static inline bool md_ioctl_valid(unsigned int cmd) |
6974 | { | |
6975 | switch (cmd) { | |
6976 | case ADD_NEW_DISK: | |
6977 | case BLKROSET: | |
6978 | case GET_ARRAY_INFO: | |
6979 | case GET_BITMAP_FILE: | |
6980 | case GET_DISK_INFO: | |
6981 | case HOT_ADD_DISK: | |
6982 | case HOT_REMOVE_DISK: | |
cb335f88 NS |
6983 | case RAID_AUTORUN: |
6984 | case RAID_VERSION: | |
6985 | case RESTART_ARRAY_RW: | |
6986 | case RUN_ARRAY: | |
6987 | case SET_ARRAY_INFO: | |
6988 | case SET_BITMAP_FILE: | |
6989 | case SET_DISK_FAULTY: | |
6990 | case STOP_ARRAY: | |
6991 | case STOP_ARRAY_RO: | |
1aee41f6 | 6992 | case CLUSTERED_DISK_NACK: |
cb335f88 NS |
6993 | return true; |
6994 | default: | |
6995 | return false; | |
6996 | } | |
6997 | } | |
6998 | ||
a39907fa | 6999 | static int md_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
7000 | unsigned int cmd, unsigned long arg) |
7001 | { | |
7002 | int err = 0; | |
7003 | void __user *argp = (void __user *)arg; | |
fd01b88c | 7004 | struct mddev *mddev = NULL; |
e2218350 | 7005 | int ro; |
065e519e | 7006 | bool did_set_md_closing = false; |
1da177e4 | 7007 | |
cb335f88 NS |
7008 | if (!md_ioctl_valid(cmd)) |
7009 | return -ENOTTY; | |
7010 | ||
506c9e44 N |
7011 | switch (cmd) { |
7012 | case RAID_VERSION: | |
7013 | case GET_ARRAY_INFO: | |
7014 | case GET_DISK_INFO: | |
7015 | break; | |
7016 | default: | |
7017 | if (!capable(CAP_SYS_ADMIN)) | |
7018 | return -EACCES; | |
7019 | } | |
1da177e4 LT |
7020 | |
7021 | /* | |
7022 | * Commands dealing with the RAID driver but not any | |
7023 | * particular array: | |
7024 | */ | |
c02c0aeb N |
7025 | switch (cmd) { |
7026 | case RAID_VERSION: | |
7027 | err = get_version(argp); | |
3adc28d8 | 7028 | goto out; |
1da177e4 | 7029 | |
1da177e4 | 7030 | #ifndef MODULE |
c02c0aeb N |
7031 | case RAID_AUTORUN: |
7032 | err = 0; | |
7033 | autostart_arrays(arg); | |
3adc28d8 | 7034 | goto out; |
1da177e4 | 7035 | #endif |
c02c0aeb | 7036 | default:; |
1da177e4 LT |
7037 | } |
7038 | ||
7039 | /* | |
7040 | * Commands creating/starting a new array: | |
7041 | */ | |
7042 | ||
a39907fa | 7043 | mddev = bdev->bd_disk->private_data; |
1da177e4 LT |
7044 | |
7045 | if (!mddev) { | |
7046 | BUG(); | |
3adc28d8 | 7047 | goto out; |
1da177e4 LT |
7048 | } |
7049 | ||
1ca69c4b N |
7050 | /* Some actions do not requires the mutex */ |
7051 | switch (cmd) { | |
7052 | case GET_ARRAY_INFO: | |
7053 | if (!mddev->raid_disks && !mddev->external) | |
7054 | err = -ENODEV; | |
7055 | else | |
7056 | err = get_array_info(mddev, argp); | |
3adc28d8 | 7057 | goto out; |
1ca69c4b N |
7058 | |
7059 | case GET_DISK_INFO: | |
7060 | if (!mddev->raid_disks && !mddev->external) | |
7061 | err = -ENODEV; | |
7062 | else | |
7063 | err = get_disk_info(mddev, argp); | |
3adc28d8 | 7064 | goto out; |
1ca69c4b N |
7065 | |
7066 | case SET_DISK_FAULTY: | |
7067 | err = set_disk_faulty(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7068 | goto out; |
4af1a041 N |
7069 | |
7070 | case GET_BITMAP_FILE: | |
7071 | err = get_bitmap_file(mddev, argp); | |
7072 | goto out; | |
7073 | ||
1ca69c4b N |
7074 | } |
7075 | ||
a7a3f08d N |
7076 | if (cmd == ADD_NEW_DISK) |
7077 | /* need to ensure md_delayed_delete() has completed */ | |
7078 | flush_workqueue(md_misc_wq); | |
7079 | ||
90f5f7ad HR |
7080 | if (cmd == HOT_REMOVE_DISK) |
7081 | /* need to ensure recovery thread has run */ | |
7082 | wait_event_interruptible_timeout(mddev->sb_wait, | |
7083 | !test_bit(MD_RECOVERY_NEEDED, | |
82a301cb | 7084 | &mddev->recovery), |
90f5f7ad | 7085 | msecs_to_jiffies(5000)); |
260fa034 N |
7086 | if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) { |
7087 | /* Need to flush page cache, and ensure no-one else opens | |
7088 | * and writes | |
7089 | */ | |
7090 | mutex_lock(&mddev->open_mutex); | |
9ba3b7f5 | 7091 | if (mddev->pers && atomic_read(&mddev->openers) > 1) { |
260fa034 N |
7092 | mutex_unlock(&mddev->open_mutex); |
7093 | err = -EBUSY; | |
3adc28d8 | 7094 | goto out; |
260fa034 | 7095 | } |
065e519e | 7096 | WARN_ON_ONCE(test_bit(MD_CLOSING, &mddev->flags)); |
af8d8e6f | 7097 | set_bit(MD_CLOSING, &mddev->flags); |
065e519e | 7098 | did_set_md_closing = true; |
260fa034 N |
7099 | mutex_unlock(&mddev->open_mutex); |
7100 | sync_blockdev(bdev); | |
7101 | } | |
1da177e4 LT |
7102 | err = mddev_lock(mddev); |
7103 | if (err) { | |
9d48739e N |
7104 | pr_debug("md: ioctl lock interrupted, reason %d, cmd %d\n", |
7105 | err, cmd); | |
3adc28d8 | 7106 | goto out; |
1da177e4 LT |
7107 | } |
7108 | ||
c02c0aeb N |
7109 | if (cmd == SET_ARRAY_INFO) { |
7110 | mdu_array_info_t info; | |
7111 | if (!arg) | |
7112 | memset(&info, 0, sizeof(info)); | |
7113 | else if (copy_from_user(&info, argp, sizeof(info))) { | |
7114 | err = -EFAULT; | |
3adc28d8 | 7115 | goto unlock; |
c02c0aeb N |
7116 | } |
7117 | if (mddev->pers) { | |
7118 | err = update_array_info(mddev, &info); | |
7119 | if (err) { | |
9d48739e | 7120 | pr_warn("md: couldn't update array info. %d\n", err); |
3adc28d8 | 7121 | goto unlock; |
1da177e4 | 7122 | } |
3adc28d8 | 7123 | goto unlock; |
c02c0aeb N |
7124 | } |
7125 | if (!list_empty(&mddev->disks)) { | |
9d48739e | 7126 | pr_warn("md: array %s already has disks!\n", mdname(mddev)); |
c02c0aeb | 7127 | err = -EBUSY; |
3adc28d8 | 7128 | goto unlock; |
c02c0aeb N |
7129 | } |
7130 | if (mddev->raid_disks) { | |
9d48739e | 7131 | pr_warn("md: array %s already initialised!\n", mdname(mddev)); |
c02c0aeb | 7132 | err = -EBUSY; |
3adc28d8 | 7133 | goto unlock; |
c02c0aeb N |
7134 | } |
7135 | err = set_array_info(mddev, &info); | |
7136 | if (err) { | |
9d48739e | 7137 | pr_warn("md: couldn't set array info. %d\n", err); |
3adc28d8 | 7138 | goto unlock; |
c02c0aeb | 7139 | } |
3adc28d8 | 7140 | goto unlock; |
1da177e4 LT |
7141 | } |
7142 | ||
7143 | /* | |
7144 | * Commands querying/configuring an existing array: | |
7145 | */ | |
32a7627c | 7146 | /* if we are not initialised yet, only ADD_NEW_DISK, STOP_ARRAY, |
3f9d7b0d | 7147 | * RUN_ARRAY, and GET_ and SET_BITMAP_FILE are allowed */ |
a17184a9 N |
7148 | if ((!mddev->raid_disks && !mddev->external) |
7149 | && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY | |
7150 | && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE | |
7151 | && cmd != GET_BITMAP_FILE) { | |
1da177e4 | 7152 | err = -ENODEV; |
3adc28d8 | 7153 | goto unlock; |
1da177e4 LT |
7154 | } |
7155 | ||
7156 | /* | |
7157 | * Commands even a read-only array can execute: | |
7158 | */ | |
c02c0aeb | 7159 | switch (cmd) { |
c02c0aeb N |
7160 | case RESTART_ARRAY_RW: |
7161 | err = restart_array(mddev); | |
3adc28d8 | 7162 | goto unlock; |
1da177e4 | 7163 | |
c02c0aeb N |
7164 | case STOP_ARRAY: |
7165 | err = do_md_stop(mddev, 0, bdev); | |
3adc28d8 | 7166 | goto unlock; |
1da177e4 | 7167 | |
c02c0aeb N |
7168 | case STOP_ARRAY_RO: |
7169 | err = md_set_readonly(mddev, bdev); | |
3adc28d8 | 7170 | goto unlock; |
1da177e4 | 7171 | |
3ea8929d N |
7172 | case HOT_REMOVE_DISK: |
7173 | err = hot_remove_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7174 | goto unlock; |
3ea8929d | 7175 | |
7ceb17e8 N |
7176 | case ADD_NEW_DISK: |
7177 | /* We can support ADD_NEW_DISK on read-only arrays | |
466ad292 | 7178 | * only if we are re-adding a preexisting device. |
7ceb17e8 N |
7179 | * So require mddev->pers and MD_DISK_SYNC. |
7180 | */ | |
7181 | if (mddev->pers) { | |
7182 | mdu_disk_info_t info; | |
7183 | if (copy_from_user(&info, argp, sizeof(info))) | |
7184 | err = -EFAULT; | |
7185 | else if (!(info.state & (1<<MD_DISK_SYNC))) | |
7186 | /* Need to clear read-only for this */ | |
7187 | break; | |
7188 | else | |
7189 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 7190 | goto unlock; |
7ceb17e8 N |
7191 | } |
7192 | break; | |
7193 | ||
c02c0aeb N |
7194 | case BLKROSET: |
7195 | if (get_user(ro, (int __user *)(arg))) { | |
7196 | err = -EFAULT; | |
3adc28d8 | 7197 | goto unlock; |
c02c0aeb N |
7198 | } |
7199 | err = -EINVAL; | |
e2218350 | 7200 | |
c02c0aeb N |
7201 | /* if the bdev is going readonly the value of mddev->ro |
7202 | * does not matter, no writes are coming | |
7203 | */ | |
7204 | if (ro) | |
3adc28d8 | 7205 | goto unlock; |
e2218350 | 7206 | |
c02c0aeb N |
7207 | /* are we are already prepared for writes? */ |
7208 | if (mddev->ro != 1) | |
3adc28d8 | 7209 | goto unlock; |
e2218350 | 7210 | |
c02c0aeb N |
7211 | /* transitioning to readauto need only happen for |
7212 | * arrays that call md_write_start | |
7213 | */ | |
7214 | if (mddev->pers) { | |
7215 | err = restart_array(mddev); | |
7216 | if (err == 0) { | |
7217 | mddev->ro = 2; | |
7218 | set_disk_ro(mddev->gendisk, 0); | |
e2218350 | 7219 | } |
c02c0aeb | 7220 | } |
3adc28d8 | 7221 | goto unlock; |
1da177e4 LT |
7222 | } |
7223 | ||
7224 | /* | |
7225 | * The remaining ioctls are changing the state of the | |
f91de92e | 7226 | * superblock, so we do not allow them on read-only arrays. |
1da177e4 | 7227 | */ |
326eb17d | 7228 | if (mddev->ro && mddev->pers) { |
f91de92e N |
7229 | if (mddev->ro == 2) { |
7230 | mddev->ro = 0; | |
00bcb4ac | 7231 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 7232 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f3378b48 N |
7233 | /* mddev_unlock will wake thread */ |
7234 | /* If a device failed while we were read-only, we | |
7235 | * need to make sure the metadata is updated now. | |
7236 | */ | |
2953079c | 7237 | if (test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) { |
f3378b48 N |
7238 | mddev_unlock(mddev); |
7239 | wait_event(mddev->sb_wait, | |
2953079c SL |
7240 | !test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags) && |
7241 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); | |
29f097c4 | 7242 | mddev_lock_nointr(mddev); |
f3378b48 | 7243 | } |
f91de92e N |
7244 | } else { |
7245 | err = -EROFS; | |
3adc28d8 | 7246 | goto unlock; |
f91de92e | 7247 | } |
1da177e4 LT |
7248 | } |
7249 | ||
c02c0aeb N |
7250 | switch (cmd) { |
7251 | case ADD_NEW_DISK: | |
1da177e4 | 7252 | { |
c02c0aeb N |
7253 | mdu_disk_info_t info; |
7254 | if (copy_from_user(&info, argp, sizeof(info))) | |
7255 | err = -EFAULT; | |
7256 | else | |
7257 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 7258 | goto unlock; |
c02c0aeb | 7259 | } |
1da177e4 | 7260 | |
1aee41f6 GR |
7261 | case CLUSTERED_DISK_NACK: |
7262 | if (mddev_is_clustered(mddev)) | |
7263 | md_cluster_ops->new_disk_ack(mddev, false); | |
7264 | else | |
7265 | err = -EINVAL; | |
7266 | goto unlock; | |
7267 | ||
c02c0aeb N |
7268 | case HOT_ADD_DISK: |
7269 | err = hot_add_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7270 | goto unlock; |
1da177e4 | 7271 | |
c02c0aeb N |
7272 | case RUN_ARRAY: |
7273 | err = do_md_run(mddev); | |
3adc28d8 | 7274 | goto unlock; |
1da177e4 | 7275 | |
c02c0aeb N |
7276 | case SET_BITMAP_FILE: |
7277 | err = set_bitmap_file(mddev, (int)arg); | |
3adc28d8 | 7278 | goto unlock; |
32a7627c | 7279 | |
c02c0aeb N |
7280 | default: |
7281 | err = -EINVAL; | |
3adc28d8 | 7282 | goto unlock; |
1da177e4 LT |
7283 | } |
7284 | ||
3adc28d8 | 7285 | unlock: |
d3374825 N |
7286 | if (mddev->hold_active == UNTIL_IOCTL && |
7287 | err != -EINVAL) | |
7288 | mddev->hold_active = 0; | |
1da177e4 | 7289 | mddev_unlock(mddev); |
3adc28d8 | 7290 | out: |
065e519e N |
7291 | if(did_set_md_closing) |
7292 | clear_bit(MD_CLOSING, &mddev->flags); | |
1da177e4 LT |
7293 | return err; |
7294 | } | |
aa98aa31 AB |
7295 | #ifdef CONFIG_COMPAT |
7296 | static int md_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
7297 | unsigned int cmd, unsigned long arg) | |
7298 | { | |
7299 | switch (cmd) { | |
7300 | case HOT_REMOVE_DISK: | |
7301 | case HOT_ADD_DISK: | |
7302 | case SET_DISK_FAULTY: | |
7303 | case SET_BITMAP_FILE: | |
7304 | /* These take in integer arg, do not convert */ | |
7305 | break; | |
7306 | default: | |
7307 | arg = (unsigned long)compat_ptr(arg); | |
7308 | break; | |
7309 | } | |
7310 | ||
7311 | return md_ioctl(bdev, mode, cmd, arg); | |
7312 | } | |
7313 | #endif /* CONFIG_COMPAT */ | |
1da177e4 | 7314 | |
a39907fa | 7315 | static int md_open(struct block_device *bdev, fmode_t mode) |
1da177e4 LT |
7316 | { |
7317 | /* | |
7318 | * Succeed if we can lock the mddev, which confirms that | |
7319 | * it isn't being stopped right now. | |
7320 | */ | |
fd01b88c | 7321 | struct mddev *mddev = mddev_find(bdev->bd_dev); |
1da177e4 LT |
7322 | int err; |
7323 | ||
0c098220 YL |
7324 | if (!mddev) |
7325 | return -ENODEV; | |
7326 | ||
d3374825 N |
7327 | if (mddev->gendisk != bdev->bd_disk) { |
7328 | /* we are racing with mddev_put which is discarding this | |
7329 | * bd_disk. | |
7330 | */ | |
7331 | mddev_put(mddev); | |
7332 | /* Wait until bdev->bd_disk is definitely gone */ | |
e804ac78 | 7333 | flush_workqueue(md_misc_wq); |
d3374825 N |
7334 | /* Then retry the open from the top */ |
7335 | return -ERESTARTSYS; | |
7336 | } | |
7337 | BUG_ON(mddev != bdev->bd_disk->private_data); | |
7338 | ||
c8c00a69 | 7339 | if ((err = mutex_lock_interruptible(&mddev->open_mutex))) |
1da177e4 LT |
7340 | goto out; |
7341 | ||
af8d8e6f GJ |
7342 | if (test_bit(MD_CLOSING, &mddev->flags)) { |
7343 | mutex_unlock(&mddev->open_mutex); | |
e2342ca8 N |
7344 | err = -ENODEV; |
7345 | goto out; | |
af8d8e6f GJ |
7346 | } |
7347 | ||
1da177e4 | 7348 | err = 0; |
f2ea68cf | 7349 | atomic_inc(&mddev->openers); |
c8c00a69 | 7350 | mutex_unlock(&mddev->open_mutex); |
1da177e4 | 7351 | |
f0b4f7e2 | 7352 | check_disk_change(bdev); |
1da177e4 | 7353 | out: |
e2342ca8 N |
7354 | if (err) |
7355 | mddev_put(mddev); | |
1da177e4 LT |
7356 | return err; |
7357 | } | |
7358 | ||
db2a144b | 7359 | static void md_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 7360 | { |
f72ffdd6 | 7361 | struct mddev *mddev = disk->private_data; |
1da177e4 | 7362 | |
52e5f9d1 | 7363 | BUG_ON(!mddev); |
f2ea68cf | 7364 | atomic_dec(&mddev->openers); |
1da177e4 | 7365 | mddev_put(mddev); |
1da177e4 | 7366 | } |
f0b4f7e2 N |
7367 | |
7368 | static int md_media_changed(struct gendisk *disk) | |
7369 | { | |
fd01b88c | 7370 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7371 | |
7372 | return mddev->changed; | |
7373 | } | |
7374 | ||
7375 | static int md_revalidate(struct gendisk *disk) | |
7376 | { | |
fd01b88c | 7377 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7378 | |
7379 | mddev->changed = 0; | |
7380 | return 0; | |
7381 | } | |
83d5cde4 | 7382 | static const struct block_device_operations md_fops = |
1da177e4 LT |
7383 | { |
7384 | .owner = THIS_MODULE, | |
a39907fa AV |
7385 | .open = md_open, |
7386 | .release = md_release, | |
b492b852 | 7387 | .ioctl = md_ioctl, |
aa98aa31 AB |
7388 | #ifdef CONFIG_COMPAT |
7389 | .compat_ioctl = md_compat_ioctl, | |
7390 | #endif | |
a885c8c4 | 7391 | .getgeo = md_getgeo, |
f0b4f7e2 N |
7392 | .media_changed = md_media_changed, |
7393 | .revalidate_disk= md_revalidate, | |
1da177e4 LT |
7394 | }; |
7395 | ||
f72ffdd6 | 7396 | static int md_thread(void *arg) |
1da177e4 | 7397 | { |
2b8bf345 | 7398 | struct md_thread *thread = arg; |
1da177e4 | 7399 | |
1da177e4 LT |
7400 | /* |
7401 | * md_thread is a 'system-thread', it's priority should be very | |
7402 | * high. We avoid resource deadlocks individually in each | |
7403 | * raid personality. (RAID5 does preallocation) We also use RR and | |
7404 | * the very same RT priority as kswapd, thus we will never get | |
7405 | * into a priority inversion deadlock. | |
7406 | * | |
7407 | * we definitely have to have equal or higher priority than | |
7408 | * bdflush, otherwise bdflush will deadlock if there are too | |
7409 | * many dirty RAID5 blocks. | |
7410 | */ | |
1da177e4 | 7411 | |
6985c43f | 7412 | allow_signal(SIGKILL); |
a6fb0934 | 7413 | while (!kthread_should_stop()) { |
1da177e4 | 7414 | |
93588e22 N |
7415 | /* We need to wait INTERRUPTIBLE so that |
7416 | * we don't add to the load-average. | |
7417 | * That means we need to be sure no signals are | |
7418 | * pending | |
7419 | */ | |
7420 | if (signal_pending(current)) | |
7421 | flush_signals(current); | |
7422 | ||
7423 | wait_event_interruptible_timeout | |
7424 | (thread->wqueue, | |
7425 | test_bit(THREAD_WAKEUP, &thread->flags) | |
ce1ccd07 | 7426 | || kthread_should_stop() || kthread_should_park(), |
93588e22 | 7427 | thread->timeout); |
1da177e4 | 7428 | |
6c987910 | 7429 | clear_bit(THREAD_WAKEUP, &thread->flags); |
ce1ccd07 SL |
7430 | if (kthread_should_park()) |
7431 | kthread_parkme(); | |
6c987910 | 7432 | if (!kthread_should_stop()) |
4ed8731d | 7433 | thread->run(thread); |
1da177e4 | 7434 | } |
a6fb0934 | 7435 | |
1da177e4 LT |
7436 | return 0; |
7437 | } | |
7438 | ||
2b8bf345 | 7439 | void md_wakeup_thread(struct md_thread *thread) |
1da177e4 LT |
7440 | { |
7441 | if (thread) { | |
36a4e1fe | 7442 | pr_debug("md: waking up MD thread %s.\n", thread->tsk->comm); |
4ad23a97 N |
7443 | if (!test_and_set_bit(THREAD_WAKEUP, &thread->flags)) |
7444 | wake_up(&thread->wqueue); | |
1da177e4 LT |
7445 | } |
7446 | } | |
6c144d31 | 7447 | EXPORT_SYMBOL(md_wakeup_thread); |
1da177e4 | 7448 | |
4ed8731d SL |
7449 | struct md_thread *md_register_thread(void (*run) (struct md_thread *), |
7450 | struct mddev *mddev, const char *name) | |
1da177e4 | 7451 | { |
2b8bf345 | 7452 | struct md_thread *thread; |
1da177e4 | 7453 | |
2b8bf345 | 7454 | thread = kzalloc(sizeof(struct md_thread), GFP_KERNEL); |
1da177e4 LT |
7455 | if (!thread) |
7456 | return NULL; | |
7457 | ||
1da177e4 LT |
7458 | init_waitqueue_head(&thread->wqueue); |
7459 | ||
1da177e4 LT |
7460 | thread->run = run; |
7461 | thread->mddev = mddev; | |
32a7627c | 7462 | thread->timeout = MAX_SCHEDULE_TIMEOUT; |
0da3c619 N |
7463 | thread->tsk = kthread_run(md_thread, thread, |
7464 | "%s_%s", | |
7465 | mdname(thread->mddev), | |
0232605d | 7466 | name); |
a6fb0934 | 7467 | if (IS_ERR(thread->tsk)) { |
1da177e4 LT |
7468 | kfree(thread); |
7469 | return NULL; | |
7470 | } | |
1da177e4 LT |
7471 | return thread; |
7472 | } | |
6c144d31 | 7473 | EXPORT_SYMBOL(md_register_thread); |
1da177e4 | 7474 | |
2b8bf345 | 7475 | void md_unregister_thread(struct md_thread **threadp) |
1da177e4 | 7476 | { |
2b8bf345 | 7477 | struct md_thread *thread = *threadp; |
e0cf8f04 N |
7478 | if (!thread) |
7479 | return; | |
36a4e1fe | 7480 | pr_debug("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk)); |
01f96c0a N |
7481 | /* Locking ensures that mddev_unlock does not wake_up a |
7482 | * non-existent thread | |
7483 | */ | |
7484 | spin_lock(&pers_lock); | |
7485 | *threadp = NULL; | |
7486 | spin_unlock(&pers_lock); | |
a6fb0934 N |
7487 | |
7488 | kthread_stop(thread->tsk); | |
1da177e4 LT |
7489 | kfree(thread); |
7490 | } | |
6c144d31 | 7491 | EXPORT_SYMBOL(md_unregister_thread); |
1da177e4 | 7492 | |
fd01b88c | 7493 | void md_error(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 7494 | { |
b2d444d7 | 7495 | if (!rdev || test_bit(Faulty, &rdev->flags)) |
1da177e4 | 7496 | return; |
6bfe0b49 | 7497 | |
de393cde | 7498 | if (!mddev->pers || !mddev->pers->error_handler) |
1da177e4 LT |
7499 | return; |
7500 | mddev->pers->error_handler(mddev,rdev); | |
72a23c21 NB |
7501 | if (mddev->degraded) |
7502 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
00bcb4ac | 7503 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
7504 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
7505 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7506 | md_wakeup_thread(mddev->thread); | |
768a418d | 7507 | if (mddev->event_work.func) |
e804ac78 | 7508 | queue_work(md_misc_wq, &mddev->event_work); |
bb9ef716 | 7509 | md_new_event(mddev); |
1da177e4 | 7510 | } |
6c144d31 | 7511 | EXPORT_SYMBOL(md_error); |
1da177e4 LT |
7512 | |
7513 | /* seq_file implementation /proc/mdstat */ | |
7514 | ||
7515 | static void status_unused(struct seq_file *seq) | |
7516 | { | |
7517 | int i = 0; | |
3cb03002 | 7518 | struct md_rdev *rdev; |
1da177e4 LT |
7519 | |
7520 | seq_printf(seq, "unused devices: "); | |
7521 | ||
159ec1fc | 7522 | list_for_each_entry(rdev, &pending_raid_disks, same_set) { |
1da177e4 LT |
7523 | char b[BDEVNAME_SIZE]; |
7524 | i++; | |
7525 | seq_printf(seq, "%s ", | |
7526 | bdevname(rdev->bdev,b)); | |
7527 | } | |
7528 | if (!i) | |
7529 | seq_printf(seq, "<none>"); | |
7530 | ||
7531 | seq_printf(seq, "\n"); | |
7532 | } | |
7533 | ||
f7851be7 | 7534 | static int status_resync(struct seq_file *seq, struct mddev *mddev) |
1da177e4 | 7535 | { |
dd71cf6b N |
7536 | sector_t max_sectors, resync, res; |
7537 | unsigned long dt, db; | |
7538 | sector_t rt; | |
4588b42e N |
7539 | int scale; |
7540 | unsigned int per_milli; | |
1da177e4 | 7541 | |
c804cdec N |
7542 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
7543 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
dd71cf6b | 7544 | max_sectors = mddev->resync_max_sectors; |
1da177e4 | 7545 | else |
dd71cf6b | 7546 | max_sectors = mddev->dev_sectors; |
1da177e4 | 7547 | |
f7851be7 N |
7548 | resync = mddev->curr_resync; |
7549 | if (resync <= 3) { | |
7550 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) | |
7551 | /* Still cleaning up */ | |
7552 | resync = max_sectors; | |
7553 | } else | |
7554 | resync -= atomic_read(&mddev->recovery_active); | |
7555 | ||
7556 | if (resync == 0) { | |
7557 | if (mddev->recovery_cp < MaxSector) { | |
7558 | seq_printf(seq, "\tresync=PENDING"); | |
7559 | return 1; | |
7560 | } | |
7561 | return 0; | |
7562 | } | |
7563 | if (resync < 3) { | |
7564 | seq_printf(seq, "\tresync=DELAYED"); | |
7565 | return 1; | |
7566 | } | |
7567 | ||
403df478 | 7568 | WARN_ON(max_sectors == 0); |
4588b42e | 7569 | /* Pick 'scale' such that (resync>>scale)*1000 will fit |
dd71cf6b | 7570 | * in a sector_t, and (max_sectors>>scale) will fit in a |
4588b42e N |
7571 | * u32, as those are the requirements for sector_div. |
7572 | * Thus 'scale' must be at least 10 | |
7573 | */ | |
7574 | scale = 10; | |
7575 | if (sizeof(sector_t) > sizeof(unsigned long)) { | |
dd71cf6b | 7576 | while ( max_sectors/2 > (1ULL<<(scale+32))) |
4588b42e N |
7577 | scale++; |
7578 | } | |
7579 | res = (resync>>scale)*1000; | |
dd71cf6b | 7580 | sector_div(res, (u32)((max_sectors>>scale)+1)); |
4588b42e N |
7581 | |
7582 | per_milli = res; | |
1da177e4 | 7583 | { |
4588b42e | 7584 | int i, x = per_milli/50, y = 20-x; |
1da177e4 LT |
7585 | seq_printf(seq, "["); |
7586 | for (i = 0; i < x; i++) | |
7587 | seq_printf(seq, "="); | |
7588 | seq_printf(seq, ">"); | |
7589 | for (i = 0; i < y; i++) | |
7590 | seq_printf(seq, "."); | |
7591 | seq_printf(seq, "] "); | |
7592 | } | |
4588b42e | 7593 | seq_printf(seq, " %s =%3u.%u%% (%llu/%llu)", |
ccfcc3c1 N |
7594 | (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)? |
7595 | "reshape" : | |
61df9d91 N |
7596 | (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)? |
7597 | "check" : | |
7598 | (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? | |
7599 | "resync" : "recovery"))), | |
7600 | per_milli/10, per_milli % 10, | |
dd71cf6b N |
7601 | (unsigned long long) resync/2, |
7602 | (unsigned long long) max_sectors/2); | |
1da177e4 LT |
7603 | |
7604 | /* | |
1da177e4 LT |
7605 | * dt: time from mark until now |
7606 | * db: blocks written from mark until now | |
7607 | * rt: remaining time | |
dd71cf6b N |
7608 | * |
7609 | * rt is a sector_t, so could be 32bit or 64bit. | |
7610 | * So we divide before multiply in case it is 32bit and close | |
7611 | * to the limit. | |
25985edc | 7612 | * We scale the divisor (db) by 32 to avoid losing precision |
dd71cf6b N |
7613 | * near the end of resync when the number of remaining sectors |
7614 | * is close to 'db'. | |
7615 | * We then divide rt by 32 after multiplying by db to compensate. | |
7616 | * The '+1' avoids division by zero if db is very small. | |
1da177e4 LT |
7617 | */ |
7618 | dt = ((jiffies - mddev->resync_mark) / HZ); | |
7619 | if (!dt) dt++; | |
ff4e8d9a N |
7620 | db = (mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active)) |
7621 | - mddev->resync_mark_cnt; | |
1da177e4 | 7622 | |
dd71cf6b N |
7623 | rt = max_sectors - resync; /* number of remaining sectors */ |
7624 | sector_div(rt, db/32+1); | |
7625 | rt *= dt; | |
7626 | rt >>= 5; | |
7627 | ||
7628 | seq_printf(seq, " finish=%lu.%lumin", (unsigned long)rt / 60, | |
7629 | ((unsigned long)rt % 60)/6); | |
1da177e4 | 7630 | |
ff4e8d9a | 7631 | seq_printf(seq, " speed=%ldK/sec", db/2/dt); |
f7851be7 | 7632 | return 1; |
1da177e4 LT |
7633 | } |
7634 | ||
7635 | static void *md_seq_start(struct seq_file *seq, loff_t *pos) | |
7636 | { | |
7637 | struct list_head *tmp; | |
7638 | loff_t l = *pos; | |
fd01b88c | 7639 | struct mddev *mddev; |
1da177e4 LT |
7640 | |
7641 | if (l >= 0x10000) | |
7642 | return NULL; | |
7643 | if (!l--) | |
7644 | /* header */ | |
7645 | return (void*)1; | |
7646 | ||
7647 | spin_lock(&all_mddevs_lock); | |
7648 | list_for_each(tmp,&all_mddevs) | |
7649 | if (!l--) { | |
fd01b88c | 7650 | mddev = list_entry(tmp, struct mddev, all_mddevs); |
1da177e4 LT |
7651 | mddev_get(mddev); |
7652 | spin_unlock(&all_mddevs_lock); | |
7653 | return mddev; | |
7654 | } | |
7655 | spin_unlock(&all_mddevs_lock); | |
7656 | if (!l--) | |
7657 | return (void*)2;/* tail */ | |
7658 | return NULL; | |
7659 | } | |
7660 | ||
7661 | static void *md_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
7662 | { | |
7663 | struct list_head *tmp; | |
fd01b88c | 7664 | struct mddev *next_mddev, *mddev = v; |
f72ffdd6 | 7665 | |
1da177e4 LT |
7666 | ++*pos; |
7667 | if (v == (void*)2) | |
7668 | return NULL; | |
7669 | ||
7670 | spin_lock(&all_mddevs_lock); | |
7671 | if (v == (void*)1) | |
7672 | tmp = all_mddevs.next; | |
7673 | else | |
7674 | tmp = mddev->all_mddevs.next; | |
7675 | if (tmp != &all_mddevs) | |
fd01b88c | 7676 | next_mddev = mddev_get(list_entry(tmp,struct mddev,all_mddevs)); |
1da177e4 LT |
7677 | else { |
7678 | next_mddev = (void*)2; | |
7679 | *pos = 0x10000; | |
f72ffdd6 | 7680 | } |
1da177e4 LT |
7681 | spin_unlock(&all_mddevs_lock); |
7682 | ||
7683 | if (v != (void*)1) | |
7684 | mddev_put(mddev); | |
7685 | return next_mddev; | |
7686 | ||
7687 | } | |
7688 | ||
7689 | static void md_seq_stop(struct seq_file *seq, void *v) | |
7690 | { | |
fd01b88c | 7691 | struct mddev *mddev = v; |
1da177e4 LT |
7692 | |
7693 | if (mddev && v != (void*)1 && v != (void*)2) | |
7694 | mddev_put(mddev); | |
7695 | } | |
7696 | ||
7697 | static int md_seq_show(struct seq_file *seq, void *v) | |
7698 | { | |
fd01b88c | 7699 | struct mddev *mddev = v; |
dd8ac336 | 7700 | sector_t sectors; |
3cb03002 | 7701 | struct md_rdev *rdev; |
1da177e4 LT |
7702 | |
7703 | if (v == (void*)1) { | |
84fc4b56 | 7704 | struct md_personality *pers; |
1da177e4 LT |
7705 | seq_printf(seq, "Personalities : "); |
7706 | spin_lock(&pers_lock); | |
2604b703 N |
7707 | list_for_each_entry(pers, &pers_list, list) |
7708 | seq_printf(seq, "[%s] ", pers->name); | |
1da177e4 LT |
7709 | |
7710 | spin_unlock(&pers_lock); | |
7711 | seq_printf(seq, "\n"); | |
f1514638 | 7712 | seq->poll_event = atomic_read(&md_event_count); |
1da177e4 LT |
7713 | return 0; |
7714 | } | |
7715 | if (v == (void*)2) { | |
7716 | status_unused(seq); | |
7717 | return 0; | |
7718 | } | |
7719 | ||
36d091f4 | 7720 | spin_lock(&mddev->lock); |
1da177e4 LT |
7721 | if (mddev->pers || mddev->raid_disks || !list_empty(&mddev->disks)) { |
7722 | seq_printf(seq, "%s : %sactive", mdname(mddev), | |
7723 | mddev->pers ? "" : "in"); | |
7724 | if (mddev->pers) { | |
f91de92e | 7725 | if (mddev->ro==1) |
1da177e4 | 7726 | seq_printf(seq, " (read-only)"); |
f91de92e | 7727 | if (mddev->ro==2) |
52720ae7 | 7728 | seq_printf(seq, " (auto-read-only)"); |
1da177e4 LT |
7729 | seq_printf(seq, " %s", mddev->pers->name); |
7730 | } | |
7731 | ||
dd8ac336 | 7732 | sectors = 0; |
f97fcad3 N |
7733 | rcu_read_lock(); |
7734 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 LT |
7735 | char b[BDEVNAME_SIZE]; |
7736 | seq_printf(seq, " %s[%d]", | |
7737 | bdevname(rdev->bdev,b), rdev->desc_nr); | |
8ddf9efe N |
7738 | if (test_bit(WriteMostly, &rdev->flags)) |
7739 | seq_printf(seq, "(W)"); | |
9efdca16 SL |
7740 | if (test_bit(Journal, &rdev->flags)) |
7741 | seq_printf(seq, "(J)"); | |
b2d444d7 | 7742 | if (test_bit(Faulty, &rdev->flags)) { |
1da177e4 LT |
7743 | seq_printf(seq, "(F)"); |
7744 | continue; | |
2d78f8c4 N |
7745 | } |
7746 | if (rdev->raid_disk < 0) | |
b325a32e | 7747 | seq_printf(seq, "(S)"); /* spare */ |
2d78f8c4 N |
7748 | if (test_bit(Replacement, &rdev->flags)) |
7749 | seq_printf(seq, "(R)"); | |
dd8ac336 | 7750 | sectors += rdev->sectors; |
1da177e4 | 7751 | } |
f97fcad3 | 7752 | rcu_read_unlock(); |
1da177e4 LT |
7753 | |
7754 | if (!list_empty(&mddev->disks)) { | |
7755 | if (mddev->pers) | |
7756 | seq_printf(seq, "\n %llu blocks", | |
f233ea5c AN |
7757 | (unsigned long long) |
7758 | mddev->array_sectors / 2); | |
1da177e4 LT |
7759 | else |
7760 | seq_printf(seq, "\n %llu blocks", | |
dd8ac336 | 7761 | (unsigned long long)sectors / 2); |
1da177e4 | 7762 | } |
1cd6bf19 N |
7763 | if (mddev->persistent) { |
7764 | if (mddev->major_version != 0 || | |
7765 | mddev->minor_version != 90) { | |
7766 | seq_printf(seq," super %d.%d", | |
7767 | mddev->major_version, | |
7768 | mddev->minor_version); | |
7769 | } | |
e691063a N |
7770 | } else if (mddev->external) |
7771 | seq_printf(seq, " super external:%s", | |
7772 | mddev->metadata_type); | |
7773 | else | |
1cd6bf19 | 7774 | seq_printf(seq, " super non-persistent"); |
1da177e4 LT |
7775 | |
7776 | if (mddev->pers) { | |
d710e138 | 7777 | mddev->pers->status(seq, mddev); |
f72ffdd6 | 7778 | seq_printf(seq, "\n "); |
8e1b39d6 | 7779 | if (mddev->pers->sync_request) { |
f7851be7 | 7780 | if (status_resync(seq, mddev)) |
8e1b39d6 | 7781 | seq_printf(seq, "\n "); |
8e1b39d6 | 7782 | } |
32a7627c N |
7783 | } else |
7784 | seq_printf(seq, "\n "); | |
7785 | ||
57148964 | 7786 | bitmap_status(seq, mddev->bitmap); |
1da177e4 LT |
7787 | |
7788 | seq_printf(seq, "\n"); | |
7789 | } | |
36d091f4 | 7790 | spin_unlock(&mddev->lock); |
f72ffdd6 | 7791 | |
1da177e4 LT |
7792 | return 0; |
7793 | } | |
7794 | ||
110518bc | 7795 | static const struct seq_operations md_seq_ops = { |
1da177e4 LT |
7796 | .start = md_seq_start, |
7797 | .next = md_seq_next, | |
7798 | .stop = md_seq_stop, | |
7799 | .show = md_seq_show, | |
7800 | }; | |
7801 | ||
7802 | static int md_seq_open(struct inode *inode, struct file *file) | |
7803 | { | |
f1514638 | 7804 | struct seq_file *seq; |
1da177e4 LT |
7805 | int error; |
7806 | ||
7807 | error = seq_open(file, &md_seq_ops); | |
d7603b7e | 7808 | if (error) |
f1514638 KS |
7809 | return error; |
7810 | ||
7811 | seq = file->private_data; | |
7812 | seq->poll_event = atomic_read(&md_event_count); | |
1da177e4 LT |
7813 | return error; |
7814 | } | |
7815 | ||
e2f23b60 | 7816 | static int md_unloading; |
d7603b7e N |
7817 | static unsigned int mdstat_poll(struct file *filp, poll_table *wait) |
7818 | { | |
f1514638 | 7819 | struct seq_file *seq = filp->private_data; |
d7603b7e N |
7820 | int mask; |
7821 | ||
e2f23b60 | 7822 | if (md_unloading) |
7d7e64f2 | 7823 | return POLLIN|POLLRDNORM|POLLERR|POLLPRI; |
d7603b7e N |
7824 | poll_wait(filp, &md_event_waiters, wait); |
7825 | ||
7826 | /* always allow read */ | |
7827 | mask = POLLIN | POLLRDNORM; | |
7828 | ||
f1514638 | 7829 | if (seq->poll_event != atomic_read(&md_event_count)) |
d7603b7e N |
7830 | mask |= POLLERR | POLLPRI; |
7831 | return mask; | |
7832 | } | |
7833 | ||
fa027c2a | 7834 | static const struct file_operations md_seq_fops = { |
e24650c2 | 7835 | .owner = THIS_MODULE, |
1da177e4 LT |
7836 | .open = md_seq_open, |
7837 | .read = seq_read, | |
7838 | .llseek = seq_lseek, | |
c3f94b40 | 7839 | .release = seq_release_private, |
d7603b7e | 7840 | .poll = mdstat_poll, |
1da177e4 LT |
7841 | }; |
7842 | ||
84fc4b56 | 7843 | int register_md_personality(struct md_personality *p) |
1da177e4 | 7844 | { |
9d48739e N |
7845 | pr_debug("md: %s personality registered for level %d\n", |
7846 | p->name, p->level); | |
1da177e4 | 7847 | spin_lock(&pers_lock); |
2604b703 | 7848 | list_add_tail(&p->list, &pers_list); |
1da177e4 LT |
7849 | spin_unlock(&pers_lock); |
7850 | return 0; | |
7851 | } | |
6c144d31 | 7852 | EXPORT_SYMBOL(register_md_personality); |
1da177e4 | 7853 | |
84fc4b56 | 7854 | int unregister_md_personality(struct md_personality *p) |
1da177e4 | 7855 | { |
9d48739e | 7856 | pr_debug("md: %s personality unregistered\n", p->name); |
1da177e4 | 7857 | spin_lock(&pers_lock); |
2604b703 | 7858 | list_del_init(&p->list); |
1da177e4 LT |
7859 | spin_unlock(&pers_lock); |
7860 | return 0; | |
7861 | } | |
6c144d31 | 7862 | EXPORT_SYMBOL(unregister_md_personality); |
1da177e4 | 7863 | |
6022e75b N |
7864 | int register_md_cluster_operations(struct md_cluster_operations *ops, |
7865 | struct module *module) | |
edb39c9d | 7866 | { |
6022e75b | 7867 | int ret = 0; |
edb39c9d | 7868 | spin_lock(&pers_lock); |
6022e75b N |
7869 | if (md_cluster_ops != NULL) |
7870 | ret = -EALREADY; | |
7871 | else { | |
7872 | md_cluster_ops = ops; | |
7873 | md_cluster_mod = module; | |
7874 | } | |
edb39c9d | 7875 | spin_unlock(&pers_lock); |
6022e75b | 7876 | return ret; |
edb39c9d GR |
7877 | } |
7878 | EXPORT_SYMBOL(register_md_cluster_operations); | |
7879 | ||
7880 | int unregister_md_cluster_operations(void) | |
7881 | { | |
7882 | spin_lock(&pers_lock); | |
7883 | md_cluster_ops = NULL; | |
7884 | spin_unlock(&pers_lock); | |
7885 | return 0; | |
7886 | } | |
7887 | EXPORT_SYMBOL(unregister_md_cluster_operations); | |
7888 | ||
7889 | int md_setup_cluster(struct mddev *mddev, int nodes) | |
7890 | { | |
47a7b0d8 GJ |
7891 | if (!md_cluster_ops) |
7892 | request_module("md-cluster"); | |
edb39c9d | 7893 | spin_lock(&pers_lock); |
47a7b0d8 | 7894 | /* ensure module won't be unloaded */ |
edb39c9d | 7895 | if (!md_cluster_ops || !try_module_get(md_cluster_mod)) { |
9d48739e | 7896 | pr_warn("can't find md-cluster module or get it's reference.\n"); |
edb39c9d GR |
7897 | spin_unlock(&pers_lock); |
7898 | return -ENOENT; | |
7899 | } | |
7900 | spin_unlock(&pers_lock); | |
7901 | ||
cf921cc1 | 7902 | return md_cluster_ops->join(mddev, nodes); |
edb39c9d GR |
7903 | } |
7904 | ||
7905 | void md_cluster_stop(struct mddev *mddev) | |
7906 | { | |
c4ce867f GR |
7907 | if (!md_cluster_ops) |
7908 | return; | |
edb39c9d GR |
7909 | md_cluster_ops->leave(mddev); |
7910 | module_put(md_cluster_mod); | |
7911 | } | |
7912 | ||
fd01b88c | 7913 | static int is_mddev_idle(struct mddev *mddev, int init) |
1da177e4 | 7914 | { |
f72ffdd6 | 7915 | struct md_rdev *rdev; |
1da177e4 | 7916 | int idle; |
eea1bf38 | 7917 | int curr_events; |
1da177e4 LT |
7918 | |
7919 | idle = 1; | |
4b80991c N |
7920 | rcu_read_lock(); |
7921 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 7922 | struct gendisk *disk = rdev->bdev->bd_contains->bd_disk; |
eea1bf38 N |
7923 | curr_events = (int)part_stat_read(&disk->part0, sectors[0]) + |
7924 | (int)part_stat_read(&disk->part0, sectors[1]) - | |
7925 | atomic_read(&disk->sync_io); | |
713f6ab1 N |
7926 | /* sync IO will cause sync_io to increase before the disk_stats |
7927 | * as sync_io is counted when a request starts, and | |
7928 | * disk_stats is counted when it completes. | |
7929 | * So resync activity will cause curr_events to be smaller than | |
7930 | * when there was no such activity. | |
7931 | * non-sync IO will cause disk_stat to increase without | |
7932 | * increasing sync_io so curr_events will (eventually) | |
7933 | * be larger than it was before. Once it becomes | |
7934 | * substantially larger, the test below will cause | |
7935 | * the array to appear non-idle, and resync will slow | |
7936 | * down. | |
7937 | * If there is a lot of outstanding resync activity when | |
7938 | * we set last_event to curr_events, then all that activity | |
7939 | * completing might cause the array to appear non-idle | |
7940 | * and resync will be slowed down even though there might | |
7941 | * not have been non-resync activity. This will only | |
7942 | * happen once though. 'last_events' will soon reflect | |
7943 | * the state where there is little or no outstanding | |
7944 | * resync requests, and further resync activity will | |
7945 | * always make curr_events less than last_events. | |
c0e48521 | 7946 | * |
1da177e4 | 7947 | */ |
eea1bf38 | 7948 | if (init || curr_events - rdev->last_events > 64) { |
1da177e4 LT |
7949 | rdev->last_events = curr_events; |
7950 | idle = 0; | |
7951 | } | |
7952 | } | |
4b80991c | 7953 | rcu_read_unlock(); |
1da177e4 LT |
7954 | return idle; |
7955 | } | |
7956 | ||
fd01b88c | 7957 | void md_done_sync(struct mddev *mddev, int blocks, int ok) |
1da177e4 LT |
7958 | { |
7959 | /* another "blocks" (512byte) blocks have been synced */ | |
7960 | atomic_sub(blocks, &mddev->recovery_active); | |
7961 | wake_up(&mddev->recovery_wait); | |
7962 | if (!ok) { | |
dfc70645 | 7963 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
0a19caab | 7964 | set_bit(MD_RECOVERY_ERROR, &mddev->recovery); |
1da177e4 LT |
7965 | md_wakeup_thread(mddev->thread); |
7966 | // stop recovery, signal do_sync .... | |
7967 | } | |
7968 | } | |
6c144d31 | 7969 | EXPORT_SYMBOL(md_done_sync); |
1da177e4 | 7970 | |
06d91a5f N |
7971 | /* md_write_start(mddev, bi) |
7972 | * If we need to update some array metadata (e.g. 'active' flag | |
3d310eb7 N |
7973 | * in superblock) before writing, schedule a superblock update |
7974 | * and wait for it to complete. | |
cc27b0c7 N |
7975 | * A return value of 'false' means that the write wasn't recorded |
7976 | * and cannot proceed as the array is being suspend. | |
06d91a5f | 7977 | */ |
cc27b0c7 | 7978 | bool md_write_start(struct mddev *mddev, struct bio *bi) |
1da177e4 | 7979 | { |
0fd62b86 | 7980 | int did_change = 0; |
06d91a5f | 7981 | if (bio_data_dir(bi) != WRITE) |
cc27b0c7 | 7982 | return true; |
06d91a5f | 7983 | |
f91de92e N |
7984 | BUG_ON(mddev->ro == 1); |
7985 | if (mddev->ro == 2) { | |
7986 | /* need to switch to read/write */ | |
7987 | mddev->ro = 0; | |
7988 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7989 | md_wakeup_thread(mddev->thread); | |
25156198 | 7990 | md_wakeup_thread(mddev->sync_thread); |
0fd62b86 | 7991 | did_change = 1; |
f91de92e | 7992 | } |
4ad23a97 N |
7993 | rcu_read_lock(); |
7994 | percpu_ref_get(&mddev->writes_pending); | |
55cc39f3 | 7995 | smp_mb(); /* Match smp_mb in set_in_sync() */ |
31a59e34 N |
7996 | if (mddev->safemode == 1) |
7997 | mddev->safemode = 0; | |
4ad23a97 N |
7998 | /* sync_checkers is always 0 when writes_pending is in per-cpu mode */ |
7999 | if (mddev->in_sync || !mddev->sync_checkers) { | |
85572d7c | 8000 | spin_lock(&mddev->lock); |
3d310eb7 N |
8001 | if (mddev->in_sync) { |
8002 | mddev->in_sync = 0; | |
2953079c SL |
8003 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8004 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
3d310eb7 | 8005 | md_wakeup_thread(mddev->thread); |
0fd62b86 | 8006 | did_change = 1; |
3d310eb7 | 8007 | } |
85572d7c | 8008 | spin_unlock(&mddev->lock); |
06d91a5f | 8009 | } |
4ad23a97 | 8010 | rcu_read_unlock(); |
0fd62b86 | 8011 | if (did_change) |
00bcb4ac | 8012 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
09a44cc1 | 8013 | wait_event(mddev->sb_wait, |
cc27b0c7 N |
8014 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags) && !mddev->suspended); |
8015 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) { | |
8016 | percpu_ref_put(&mddev->writes_pending); | |
8017 | return false; | |
8018 | } | |
8019 | return true; | |
1da177e4 | 8020 | } |
6c144d31 | 8021 | EXPORT_SYMBOL(md_write_start); |
1da177e4 | 8022 | |
49728050 N |
8023 | /* md_write_inc can only be called when md_write_start() has |
8024 | * already been called at least once of the current request. | |
8025 | * It increments the counter and is useful when a single request | |
8026 | * is split into several parts. Each part causes an increment and | |
8027 | * so needs a matching md_write_end(). | |
8028 | * Unlike md_write_start(), it is safe to call md_write_inc() inside | |
8029 | * a spinlocked region. | |
8030 | */ | |
8031 | void md_write_inc(struct mddev *mddev, struct bio *bi) | |
8032 | { | |
8033 | if (bio_data_dir(bi) != WRITE) | |
8034 | return; | |
8035 | WARN_ON_ONCE(mddev->in_sync || mddev->ro); | |
4ad23a97 | 8036 | percpu_ref_get(&mddev->writes_pending); |
49728050 N |
8037 | } |
8038 | EXPORT_SYMBOL(md_write_inc); | |
8039 | ||
fd01b88c | 8040 | void md_write_end(struct mddev *mddev) |
1da177e4 | 8041 | { |
4ad23a97 N |
8042 | percpu_ref_put(&mddev->writes_pending); |
8043 | ||
8044 | if (mddev->safemode == 2) | |
8045 | md_wakeup_thread(mddev->thread); | |
8046 | else if (mddev->safemode_delay) | |
8047 | /* The roundup() ensures this only performs locking once | |
8048 | * every ->safemode_delay jiffies | |
8049 | */ | |
8050 | mod_timer(&mddev->safemode_timer, | |
8051 | roundup(jiffies, mddev->safemode_delay) + | |
8052 | mddev->safemode_delay); | |
1da177e4 | 8053 | } |
4ad23a97 | 8054 | |
6c144d31 | 8055 | EXPORT_SYMBOL(md_write_end); |
1da177e4 | 8056 | |
2a2275d6 N |
8057 | /* md_allow_write(mddev) |
8058 | * Calling this ensures that the array is marked 'active' so that writes | |
8059 | * may proceed without blocking. It is important to call this before | |
8060 | * attempting a GFP_KERNEL allocation while holding the mddev lock. | |
8061 | * Must be called with mddev_lock held. | |
8062 | */ | |
2214c260 | 8063 | void md_allow_write(struct mddev *mddev) |
2a2275d6 N |
8064 | { |
8065 | if (!mddev->pers) | |
2214c260 | 8066 | return; |
2a2275d6 | 8067 | if (mddev->ro) |
2214c260 | 8068 | return; |
1a0fd497 | 8069 | if (!mddev->pers->sync_request) |
2214c260 | 8070 | return; |
2a2275d6 | 8071 | |
85572d7c | 8072 | spin_lock(&mddev->lock); |
2a2275d6 N |
8073 | if (mddev->in_sync) { |
8074 | mddev->in_sync = 0; | |
2953079c SL |
8075 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8076 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
2a2275d6 N |
8077 | if (mddev->safemode_delay && |
8078 | mddev->safemode == 0) | |
8079 | mddev->safemode = 1; | |
85572d7c | 8080 | spin_unlock(&mddev->lock); |
2a2275d6 | 8081 | md_update_sb(mddev, 0); |
00bcb4ac | 8082 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
2214c260 AP |
8083 | /* wait for the dirty state to be recorded in the metadata */ |
8084 | wait_event(mddev->sb_wait, | |
8085 | !test_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags) && | |
8086 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); | |
2a2275d6 | 8087 | } else |
85572d7c | 8088 | spin_unlock(&mddev->lock); |
2a2275d6 N |
8089 | } |
8090 | EXPORT_SYMBOL_GPL(md_allow_write); | |
8091 | ||
1da177e4 LT |
8092 | #define SYNC_MARKS 10 |
8093 | #define SYNC_MARK_STEP (3*HZ) | |
54f89341 | 8094 | #define UPDATE_FREQUENCY (5*60*HZ) |
4ed8731d | 8095 | void md_do_sync(struct md_thread *thread) |
1da177e4 | 8096 | { |
4ed8731d | 8097 | struct mddev *mddev = thread->mddev; |
fd01b88c | 8098 | struct mddev *mddev2; |
1da177e4 LT |
8099 | unsigned int currspeed = 0, |
8100 | window; | |
ac7e50a3 | 8101 | sector_t max_sectors,j, io_sectors, recovery_done; |
1da177e4 | 8102 | unsigned long mark[SYNC_MARKS]; |
54f89341 | 8103 | unsigned long update_time; |
1da177e4 LT |
8104 | sector_t mark_cnt[SYNC_MARKS]; |
8105 | int last_mark,m; | |
8106 | struct list_head *tmp; | |
8107 | sector_t last_check; | |
57afd89f | 8108 | int skipped = 0; |
3cb03002 | 8109 | struct md_rdev *rdev; |
c4a39551 | 8110 | char *desc, *action = NULL; |
7c2c57c9 | 8111 | struct blk_plug plug; |
41a9a0dc | 8112 | int ret; |
1da177e4 LT |
8113 | |
8114 | /* just incase thread restarts... */ | |
8115 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) | |
8116 | return; | |
3991b31e N |
8117 | if (mddev->ro) {/* never try to sync a read-only array */ |
8118 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
5fd6c1dc | 8119 | return; |
3991b31e | 8120 | } |
1da177e4 | 8121 | |
41a9a0dc GJ |
8122 | if (mddev_is_clustered(mddev)) { |
8123 | ret = md_cluster_ops->resync_start(mddev); | |
8124 | if (ret) | |
8125 | goto skip; | |
8126 | ||
bb8bf15b | 8127 | set_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags); |
41a9a0dc GJ |
8128 | if (!(test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8129 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) || | |
8130 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) | |
8131 | && ((unsigned long long)mddev->curr_resync_completed | |
8132 | < (unsigned long long)mddev->resync_max_sectors)) | |
8133 | goto skip; | |
8134 | } | |
8135 | ||
61df9d91 | 8136 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
c4a39551 | 8137 | if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) { |
61df9d91 | 8138 | desc = "data-check"; |
c4a39551 JB |
8139 | action = "check"; |
8140 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
61df9d91 | 8141 | desc = "requested-resync"; |
c4a39551 JB |
8142 | action = "repair"; |
8143 | } else | |
61df9d91 N |
8144 | desc = "resync"; |
8145 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
8146 | desc = "reshape"; | |
8147 | else | |
8148 | desc = "recovery"; | |
8149 | ||
c4a39551 JB |
8150 | mddev->last_sync_action = action ?: desc; |
8151 | ||
1da177e4 LT |
8152 | /* we overload curr_resync somewhat here. |
8153 | * 0 == not engaged in resync at all | |
8154 | * 2 == checking that there is no conflict with another sync | |
8155 | * 1 == like 2, but have yielded to allow conflicting resync to | |
8156 | * commense | |
8157 | * other == active in resync - this many blocks | |
8158 | * | |
8159 | * Before starting a resync we must have set curr_resync to | |
8160 | * 2, and then checked that every "conflicting" array has curr_resync | |
8161 | * less than ours. When we find one that is the same or higher | |
8162 | * we wait on resync_wait. To avoid deadlock, we reduce curr_resync | |
8163 | * to 1 if we choose to yield (based arbitrarily on address of mddev structure). | |
8164 | * This will mean we have to start checking from the beginning again. | |
8165 | * | |
8166 | */ | |
8167 | ||
8168 | do { | |
c622ca54 | 8169 | int mddev2_minor = -1; |
1da177e4 LT |
8170 | mddev->curr_resync = 2; |
8171 | ||
8172 | try_again: | |
404e4b43 | 8173 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
1da177e4 | 8174 | goto skip; |
29ac4aa3 | 8175 | for_each_mddev(mddev2, tmp) { |
1da177e4 LT |
8176 | if (mddev2 == mddev) |
8177 | continue; | |
90b08710 BS |
8178 | if (!mddev->parallel_resync |
8179 | && mddev2->curr_resync | |
8180 | && match_mddev_units(mddev, mddev2)) { | |
1da177e4 LT |
8181 | DEFINE_WAIT(wq); |
8182 | if (mddev < mddev2 && mddev->curr_resync == 2) { | |
8183 | /* arbitrarily yield */ | |
8184 | mddev->curr_resync = 1; | |
8185 | wake_up(&resync_wait); | |
8186 | } | |
8187 | if (mddev > mddev2 && mddev->curr_resync == 1) | |
8188 | /* no need to wait here, we can wait the next | |
8189 | * time 'round when curr_resync == 2 | |
8190 | */ | |
8191 | continue; | |
9744197c N |
8192 | /* We need to wait 'interruptible' so as not to |
8193 | * contribute to the load average, and not to | |
8194 | * be caught by 'softlockup' | |
8195 | */ | |
8196 | prepare_to_wait(&resync_wait, &wq, TASK_INTERRUPTIBLE); | |
c91abf5a | 8197 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
8712e553 | 8198 | mddev2->curr_resync >= mddev->curr_resync) { |
c622ca54 AP |
8199 | if (mddev2_minor != mddev2->md_minor) { |
8200 | mddev2_minor = mddev2->md_minor; | |
9d48739e N |
8201 | pr_info("md: delaying %s of %s until %s has finished (they share one or more physical units)\n", |
8202 | desc, mdname(mddev), | |
8203 | mdname(mddev2)); | |
c622ca54 | 8204 | } |
1da177e4 | 8205 | mddev_put(mddev2); |
9744197c N |
8206 | if (signal_pending(current)) |
8207 | flush_signals(current); | |
1da177e4 LT |
8208 | schedule(); |
8209 | finish_wait(&resync_wait, &wq); | |
8210 | goto try_again; | |
8211 | } | |
8212 | finish_wait(&resync_wait, &wq); | |
8213 | } | |
8214 | } | |
8215 | } while (mddev->curr_resync < 2); | |
8216 | ||
5fd6c1dc | 8217 | j = 0; |
9d88883e | 8218 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
1da177e4 | 8219 | /* resync follows the size requested by the personality, |
57afd89f | 8220 | * which defaults to physical size, but can be virtual size |
1da177e4 LT |
8221 | */ |
8222 | max_sectors = mddev->resync_max_sectors; | |
7f7583d4 | 8223 | atomic64_set(&mddev->resync_mismatches, 0); |
5fd6c1dc | 8224 | /* we don't use the checkpoint if there's a bitmap */ |
5e96ee65 NB |
8225 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) |
8226 | j = mddev->resync_min; | |
8227 | else if (!mddev->bitmap) | |
5fd6c1dc | 8228 | j = mddev->recovery_cp; |
5e96ee65 | 8229 | |
ccfcc3c1 | 8230 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) |
c804cdec | 8231 | max_sectors = mddev->resync_max_sectors; |
5fd6c1dc | 8232 | else { |
1da177e4 | 8233 | /* recovery follows the physical size of devices */ |
58c0fed4 | 8234 | max_sectors = mddev->dev_sectors; |
5fd6c1dc | 8235 | j = MaxSector; |
4e59ca7d | 8236 | rcu_read_lock(); |
dafb20fa | 8237 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 8238 | if (rdev->raid_disk >= 0 && |
f2076e7d | 8239 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
8240 | !test_bit(Faulty, &rdev->flags) && |
8241 | !test_bit(In_sync, &rdev->flags) && | |
8242 | rdev->recovery_offset < j) | |
8243 | j = rdev->recovery_offset; | |
4e59ca7d | 8244 | rcu_read_unlock(); |
133d4527 N |
8245 | |
8246 | /* If there is a bitmap, we need to make sure all | |
8247 | * writes that started before we added a spare | |
8248 | * complete before we start doing a recovery. | |
8249 | * Otherwise the write might complete and (via | |
8250 | * bitmap_endwrite) set a bit in the bitmap after the | |
8251 | * recovery has checked that bit and skipped that | |
8252 | * region. | |
8253 | */ | |
8254 | if (mddev->bitmap) { | |
8255 | mddev->pers->quiesce(mddev, 1); | |
8256 | mddev->pers->quiesce(mddev, 0); | |
8257 | } | |
5fd6c1dc | 8258 | } |
1da177e4 | 8259 | |
9d48739e N |
8260 | pr_info("md: %s of RAID array %s\n", desc, mdname(mddev)); |
8261 | pr_debug("md: minimum _guaranteed_ speed: %d KB/sec/disk.\n", speed_min(mddev)); | |
8262 | pr_debug("md: using maximum available idle IO bandwidth (but not more than %d KB/sec) for %s.\n", | |
8263 | speed_max(mddev), desc); | |
1da177e4 | 8264 | |
eea1bf38 | 8265 | is_mddev_idle(mddev, 1); /* this initializes IO event counters */ |
5fd6c1dc | 8266 | |
57afd89f | 8267 | io_sectors = 0; |
1da177e4 LT |
8268 | for (m = 0; m < SYNC_MARKS; m++) { |
8269 | mark[m] = jiffies; | |
57afd89f | 8270 | mark_cnt[m] = io_sectors; |
1da177e4 LT |
8271 | } |
8272 | last_mark = 0; | |
8273 | mddev->resync_mark = mark[last_mark]; | |
8274 | mddev->resync_mark_cnt = mark_cnt[last_mark]; | |
8275 | ||
8276 | /* | |
8277 | * Tune reconstruction: | |
8278 | */ | |
8279 | window = 32*(PAGE_SIZE/512); | |
9d48739e N |
8280 | pr_debug("md: using %dk window, over a total of %lluk.\n", |
8281 | window/2, (unsigned long long)max_sectors/2); | |
1da177e4 LT |
8282 | |
8283 | atomic_set(&mddev->recovery_active, 0); | |
1da177e4 LT |
8284 | last_check = 0; |
8285 | ||
8286 | if (j>2) { | |
9d48739e N |
8287 | pr_debug("md: resuming %s of %s from checkpoint.\n", |
8288 | desc, mdname(mddev)); | |
1da177e4 | 8289 | mddev->curr_resync = j; |
72f36d59 N |
8290 | } else |
8291 | mddev->curr_resync = 3; /* no longer delayed */ | |
75d3da43 | 8292 | mddev->curr_resync_completed = j; |
72f36d59 N |
8293 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); |
8294 | md_new_event(mddev); | |
54f89341 | 8295 | update_time = jiffies; |
1da177e4 | 8296 | |
7c2c57c9 | 8297 | blk_start_plug(&plug); |
1da177e4 | 8298 | while (j < max_sectors) { |
57afd89f | 8299 | sector_t sectors; |
1da177e4 | 8300 | |
57afd89f | 8301 | skipped = 0; |
97e4f42d | 8302 | |
7a91ee1f N |
8303 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8304 | ((mddev->curr_resync > mddev->curr_resync_completed && | |
8305 | (mddev->curr_resync - mddev->curr_resync_completed) | |
8306 | > (max_sectors >> 4)) || | |
54f89341 | 8307 | time_after_eq(jiffies, update_time + UPDATE_FREQUENCY) || |
7a91ee1f | 8308 | (j - mddev->curr_resync_completed)*2 |
c5e19d90 N |
8309 | >= mddev->resync_max - mddev->curr_resync_completed || |
8310 | mddev->curr_resync_completed > mddev->resync_max | |
7a91ee1f | 8311 | )) { |
97e4f42d | 8312 | /* time to update curr_resync_completed */ |
97e4f42d N |
8313 | wait_event(mddev->recovery_wait, |
8314 | atomic_read(&mddev->recovery_active) == 0); | |
75d3da43 | 8315 | mddev->curr_resync_completed = j; |
35d78c66 | 8316 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && |
8317 | j > mddev->recovery_cp) | |
8318 | mddev->recovery_cp = j; | |
54f89341 | 8319 | update_time = jiffies; |
2953079c | 8320 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
acb180b0 | 8321 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); |
97e4f42d | 8322 | } |
acb180b0 | 8323 | |
c91abf5a N |
8324 | while (j >= mddev->resync_max && |
8325 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
e62e58a5 N |
8326 | /* As this condition is controlled by user-space, |
8327 | * we can block indefinitely, so use '_interruptible' | |
8328 | * to avoid triggering warnings. | |
8329 | */ | |
8330 | flush_signals(current); /* just in case */ | |
8331 | wait_event_interruptible(mddev->recovery_wait, | |
8332 | mddev->resync_max > j | |
c91abf5a N |
8333 | || test_bit(MD_RECOVERY_INTR, |
8334 | &mddev->recovery)); | |
e62e58a5 | 8335 | } |
acb180b0 | 8336 | |
c91abf5a N |
8337 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8338 | break; | |
acb180b0 | 8339 | |
09314799 | 8340 | sectors = mddev->pers->sync_request(mddev, j, &skipped); |
57afd89f | 8341 | if (sectors == 0) { |
dfc70645 | 8342 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
c91abf5a | 8343 | break; |
1da177e4 | 8344 | } |
57afd89f N |
8345 | |
8346 | if (!skipped) { /* actual IO requested */ | |
8347 | io_sectors += sectors; | |
8348 | atomic_add(sectors, &mddev->recovery_active); | |
8349 | } | |
8350 | ||
e875ecea N |
8351 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8352 | break; | |
8353 | ||
1da177e4 | 8354 | j += sectors; |
5ed1df2e N |
8355 | if (j > max_sectors) |
8356 | /* when skipping, extra large numbers can be returned. */ | |
8357 | j = max_sectors; | |
72f36d59 N |
8358 | if (j > 2) |
8359 | mddev->curr_resync = j; | |
ff4e8d9a | 8360 | mddev->curr_mark_cnt = io_sectors; |
d7603b7e | 8361 | if (last_check == 0) |
e875ecea | 8362 | /* this is the earliest that rebuild will be |
d7603b7e N |
8363 | * visible in /proc/mdstat |
8364 | */ | |
8365 | md_new_event(mddev); | |
57afd89f N |
8366 | |
8367 | if (last_check + window > io_sectors || j == max_sectors) | |
1da177e4 LT |
8368 | continue; |
8369 | ||
57afd89f | 8370 | last_check = io_sectors; |
1da177e4 LT |
8371 | repeat: |
8372 | if (time_after_eq(jiffies, mark[last_mark] + SYNC_MARK_STEP )) { | |
8373 | /* step marks */ | |
8374 | int next = (last_mark+1) % SYNC_MARKS; | |
8375 | ||
8376 | mddev->resync_mark = mark[next]; | |
8377 | mddev->resync_mark_cnt = mark_cnt[next]; | |
8378 | mark[next] = jiffies; | |
57afd89f | 8379 | mark_cnt[next] = io_sectors - atomic_read(&mddev->recovery_active); |
1da177e4 LT |
8380 | last_mark = next; |
8381 | } | |
8382 | ||
c91abf5a N |
8383 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8384 | break; | |
1da177e4 LT |
8385 | |
8386 | /* | |
8387 | * this loop exits only if either when we are slower than | |
8388 | * the 'hard' speed limit, or the system was IO-idle for | |
8389 | * a jiffy. | |
8390 | * the system might be non-idle CPU-wise, but we only care | |
8391 | * about not overloading the IO subsystem. (things like an | |
8392 | * e2fsck being done on the RAID array should execute fast) | |
8393 | */ | |
1da177e4 LT |
8394 | cond_resched(); |
8395 | ||
ac7e50a3 XN |
8396 | recovery_done = io_sectors - atomic_read(&mddev->recovery_active); |
8397 | currspeed = ((unsigned long)(recovery_done - mddev->resync_mark_cnt))/2 | |
57afd89f | 8398 | /((jiffies-mddev->resync_mark)/HZ +1) +1; |
1da177e4 | 8399 | |
88202a0c | 8400 | if (currspeed > speed_min(mddev)) { |
ac8fa419 | 8401 | if (currspeed > speed_max(mddev)) { |
c0e48521 | 8402 | msleep(500); |
1da177e4 LT |
8403 | goto repeat; |
8404 | } | |
ac8fa419 N |
8405 | if (!is_mddev_idle(mddev, 0)) { |
8406 | /* | |
8407 | * Give other IO more of a chance. | |
8408 | * The faster the devices, the less we wait. | |
8409 | */ | |
8410 | wait_event(mddev->recovery_wait, | |
8411 | !atomic_read(&mddev->recovery_active)); | |
8412 | } | |
1da177e4 LT |
8413 | } |
8414 | } | |
9d48739e N |
8415 | pr_info("md: %s: %s %s.\n",mdname(mddev), desc, |
8416 | test_bit(MD_RECOVERY_INTR, &mddev->recovery) | |
8417 | ? "interrupted" : "done"); | |
1da177e4 LT |
8418 | /* |
8419 | * this also signals 'finished resyncing' to md_stop | |
8420 | */ | |
7c2c57c9 | 8421 | blk_finish_plug(&plug); |
1da177e4 LT |
8422 | wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active)); |
8423 | ||
5ed1df2e N |
8424 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8425 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
1217e1d1 | 8426 | mddev->curr_resync > 3) { |
5ed1df2e N |
8427 | mddev->curr_resync_completed = mddev->curr_resync; |
8428 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); | |
8429 | } | |
09314799 | 8430 | mddev->pers->sync_request(mddev, max_sectors, &skipped); |
1da177e4 | 8431 | |
dfc70645 | 8432 | if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) && |
1217e1d1 | 8433 | mddev->curr_resync > 3) { |
5fd6c1dc N |
8434 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
8435 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
8436 | if (mddev->curr_resync >= mddev->recovery_cp) { | |
9d48739e N |
8437 | pr_debug("md: checkpointing %s of %s.\n", |
8438 | desc, mdname(mddev)); | |
0a19caab | 8439 | if (test_bit(MD_RECOVERY_ERROR, |
8440 | &mddev->recovery)) | |
8441 | mddev->recovery_cp = | |
8442 | mddev->curr_resync_completed; | |
8443 | else | |
8444 | mddev->recovery_cp = | |
8445 | mddev->curr_resync; | |
5fd6c1dc N |
8446 | } |
8447 | } else | |
8448 | mddev->recovery_cp = MaxSector; | |
8449 | } else { | |
8450 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) | |
8451 | mddev->curr_resync = MaxSector; | |
4e59ca7d | 8452 | rcu_read_lock(); |
dafb20fa | 8453 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 8454 | if (rdev->raid_disk >= 0 && |
70fffd0b | 8455 | mddev->delta_disks >= 0 && |
f2076e7d | 8456 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
8457 | !test_bit(Faulty, &rdev->flags) && |
8458 | !test_bit(In_sync, &rdev->flags) && | |
8459 | rdev->recovery_offset < mddev->curr_resync) | |
8460 | rdev->recovery_offset = mddev->curr_resync; | |
4e59ca7d | 8461 | rcu_read_unlock(); |
5fd6c1dc | 8462 | } |
1da177e4 | 8463 | } |
db91ff55 | 8464 | skip: |
bb8bf15b GJ |
8465 | /* set CHANGE_PENDING here since maybe another update is needed, |
8466 | * so other nodes are informed. It should be harmless for normal | |
8467 | * raid */ | |
2953079c SL |
8468 | set_mask_bits(&mddev->sb_flags, 0, |
8469 | BIT(MD_SB_CHANGE_PENDING) | BIT(MD_SB_CHANGE_DEVS)); | |
c186b128 | 8470 | |
23da422b | 8471 | spin_lock(&mddev->lock); |
c07b70ad N |
8472 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { |
8473 | /* We completed so min/max setting can be forgotten if used. */ | |
8474 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
8475 | mddev->resync_min = 0; | |
8476 | mddev->resync_max = MaxSector; | |
8477 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
8478 | mddev->resync_min = mddev->curr_resync_completed; | |
f7851be7 | 8479 | set_bit(MD_RECOVERY_DONE, &mddev->recovery); |
1da177e4 | 8480 | mddev->curr_resync = 0; |
23da422b N |
8481 | spin_unlock(&mddev->lock); |
8482 | ||
1da177e4 | 8483 | wake_up(&resync_wait); |
1da177e4 | 8484 | md_wakeup_thread(mddev->thread); |
c6207277 | 8485 | return; |
1da177e4 | 8486 | } |
29269553 | 8487 | EXPORT_SYMBOL_GPL(md_do_sync); |
1da177e4 | 8488 | |
746d3207 N |
8489 | static int remove_and_add_spares(struct mddev *mddev, |
8490 | struct md_rdev *this) | |
b4c4c7b8 | 8491 | { |
3cb03002 | 8492 | struct md_rdev *rdev; |
b4c4c7b8 | 8493 | int spares = 0; |
f2a371c5 | 8494 | int removed = 0; |
d787be40 | 8495 | bool remove_some = false; |
b4c4c7b8 | 8496 | |
d787be40 N |
8497 | rdev_for_each(rdev, mddev) { |
8498 | if ((this == NULL || rdev == this) && | |
8499 | rdev->raid_disk >= 0 && | |
8500 | !test_bit(Blocked, &rdev->flags) && | |
8501 | test_bit(Faulty, &rdev->flags) && | |
8502 | atomic_read(&rdev->nr_pending)==0) { | |
8503 | /* Faulty non-Blocked devices with nr_pending == 0 | |
8504 | * never get nr_pending incremented, | |
8505 | * never get Faulty cleared, and never get Blocked set. | |
8506 | * So we can synchronize_rcu now rather than once per device | |
8507 | */ | |
8508 | remove_some = true; | |
8509 | set_bit(RemoveSynchronized, &rdev->flags); | |
8510 | } | |
8511 | } | |
8512 | ||
8513 | if (remove_some) | |
8514 | synchronize_rcu(); | |
8515 | rdev_for_each(rdev, mddev) { | |
746d3207 N |
8516 | if ((this == NULL || rdev == this) && |
8517 | rdev->raid_disk >= 0 && | |
6bfe0b49 | 8518 | !test_bit(Blocked, &rdev->flags) && |
d787be40 | 8519 | ((test_bit(RemoveSynchronized, &rdev->flags) || |
f2076e7d SL |
8520 | (!test_bit(In_sync, &rdev->flags) && |
8521 | !test_bit(Journal, &rdev->flags))) && | |
d787be40 | 8522 | atomic_read(&rdev->nr_pending)==0)) { |
b4c4c7b8 | 8523 | if (mddev->pers->hot_remove_disk( |
b8321b68 | 8524 | mddev, rdev) == 0) { |
36fad858 | 8525 | sysfs_unlink_rdev(mddev, rdev); |
b4c4c7b8 | 8526 | rdev->raid_disk = -1; |
f2a371c5 | 8527 | removed++; |
b4c4c7b8 N |
8528 | } |
8529 | } | |
d787be40 N |
8530 | if (remove_some && test_bit(RemoveSynchronized, &rdev->flags)) |
8531 | clear_bit(RemoveSynchronized, &rdev->flags); | |
8532 | } | |
8533 | ||
90584fc9 JB |
8534 | if (removed && mddev->kobj.sd) |
8535 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
b4c4c7b8 | 8536 | |
2910ff17 | 8537 | if (this && removed) |
746d3207 N |
8538 | goto no_add; |
8539 | ||
dafb20fa | 8540 | rdev_for_each(rdev, mddev) { |
2910ff17 GR |
8541 | if (this && this != rdev) |
8542 | continue; | |
dbb64f86 GR |
8543 | if (test_bit(Candidate, &rdev->flags)) |
8544 | continue; | |
7bfec5f3 N |
8545 | if (rdev->raid_disk >= 0 && |
8546 | !test_bit(In_sync, &rdev->flags) && | |
f2076e7d | 8547 | !test_bit(Journal, &rdev->flags) && |
7bfec5f3 N |
8548 | !test_bit(Faulty, &rdev->flags)) |
8549 | spares++; | |
7ceb17e8 N |
8550 | if (rdev->raid_disk >= 0) |
8551 | continue; | |
8552 | if (test_bit(Faulty, &rdev->flags)) | |
8553 | continue; | |
f6b6ec5c SL |
8554 | if (!test_bit(Journal, &rdev->flags)) { |
8555 | if (mddev->ro && | |
8556 | ! (rdev->saved_raid_disk >= 0 && | |
8557 | !test_bit(Bitmap_sync, &rdev->flags))) | |
8558 | continue; | |
7ceb17e8 | 8559 | |
f6b6ec5c SL |
8560 | rdev->recovery_offset = 0; |
8561 | } | |
7ceb17e8 N |
8562 | if (mddev->pers-> |
8563 | hot_add_disk(mddev, rdev) == 0) { | |
8564 | if (sysfs_link_rdev(mddev, rdev)) | |
8565 | /* failure here is OK */; | |
f6b6ec5c SL |
8566 | if (!test_bit(Journal, &rdev->flags)) |
8567 | spares++; | |
7ceb17e8 | 8568 | md_new_event(mddev); |
2953079c | 8569 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
dfc70645 | 8570 | } |
b4c4c7b8 | 8571 | } |
746d3207 | 8572 | no_add: |
6dafab6b | 8573 | if (removed) |
2953079c | 8574 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
b4c4c7b8 N |
8575 | return spares; |
8576 | } | |
7ebc0be7 | 8577 | |
ac05f256 N |
8578 | static void md_start_sync(struct work_struct *ws) |
8579 | { | |
8580 | struct mddev *mddev = container_of(ws, struct mddev, del_work); | |
c186b128 | 8581 | |
ac05f256 N |
8582 | mddev->sync_thread = md_register_thread(md_do_sync, |
8583 | mddev, | |
8584 | "resync"); | |
8585 | if (!mddev->sync_thread) { | |
9d48739e N |
8586 | pr_warn("%s: could not start resync thread...\n", |
8587 | mdname(mddev)); | |
ac05f256 N |
8588 | /* leave the spares where they are, it shouldn't hurt */ |
8589 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
8590 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
8591 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
8592 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
8593 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 8594 | wake_up(&resync_wait); |
ac05f256 N |
8595 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
8596 | &mddev->recovery)) | |
8597 | if (mddev->sysfs_action) | |
8598 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8599 | } else | |
8600 | md_wakeup_thread(mddev->sync_thread); | |
8601 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8602 | md_new_event(mddev); | |
8603 | } | |
8604 | ||
1da177e4 LT |
8605 | /* |
8606 | * This routine is regularly called by all per-raid-array threads to | |
8607 | * deal with generic issues like resync and super-block update. | |
8608 | * Raid personalities that don't have a thread (linear/raid0) do not | |
8609 | * need this as they never do any recovery or update the superblock. | |
8610 | * | |
8611 | * It does not do any resync itself, but rather "forks" off other threads | |
8612 | * to do that as needed. | |
8613 | * When it is determined that resync is needed, we set MD_RECOVERY_RUNNING in | |
8614 | * "->recovery" and create a thread at ->sync_thread. | |
dfc70645 | 8615 | * When the thread finishes it sets MD_RECOVERY_DONE |
1da177e4 LT |
8616 | * and wakeups up this thread which will reap the thread and finish up. |
8617 | * This thread also removes any faulty devices (with nr_pending == 0). | |
8618 | * | |
8619 | * The overall approach is: | |
8620 | * 1/ if the superblock needs updating, update it. | |
8621 | * 2/ If a recovery thread is running, don't do anything else. | |
8622 | * 3/ If recovery has finished, clean up, possibly marking spares active. | |
8623 | * 4/ If there are any faulty devices, remove them. | |
8624 | * 5/ If array is degraded, try to add spares devices | |
8625 | * 6/ If array has spares or is not in-sync, start a resync thread. | |
8626 | */ | |
fd01b88c | 8627 | void md_check_recovery(struct mddev *mddev) |
1da177e4 | 8628 | { |
68866e42 JB |
8629 | if (mddev->suspended) |
8630 | return; | |
8631 | ||
5f40402d | 8632 | if (mddev->bitmap) |
aa5cbd10 | 8633 | bitmap_daemon_work(mddev); |
1da177e4 | 8634 | |
fca4d848 | 8635 | if (signal_pending(current)) { |
31a59e34 | 8636 | if (mddev->pers->sync_request && !mddev->external) { |
9d48739e N |
8637 | pr_debug("md: %s in immediate safe mode\n", |
8638 | mdname(mddev)); | |
fca4d848 N |
8639 | mddev->safemode = 2; |
8640 | } | |
8641 | flush_signals(current); | |
8642 | } | |
8643 | ||
c89a8eee N |
8644 | if (mddev->ro && !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) |
8645 | return; | |
1da177e4 | 8646 | if ( ! ( |
2953079c | 8647 | (mddev->sb_flags & ~ (1<<MD_SB_CHANGE_PENDING)) || |
1da177e4 | 8648 | test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
fca4d848 | 8649 | test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
31a59e34 | 8650 | (mddev->external == 0 && mddev->safemode == 1) || |
4ad23a97 | 8651 | (mddev->safemode == 2 |
fca4d848 | 8652 | && !mddev->in_sync && mddev->recovery_cp == MaxSector) |
1da177e4 LT |
8653 | )) |
8654 | return; | |
fca4d848 | 8655 | |
df5b89b3 | 8656 | if (mddev_trylock(mddev)) { |
b4c4c7b8 | 8657 | int spares = 0; |
fca4d848 | 8658 | |
c89a8eee | 8659 | if (mddev->ro) { |
ab16bfc7 NB |
8660 | struct md_rdev *rdev; |
8661 | if (!mddev->external && mddev->in_sync) | |
8662 | /* 'Blocked' flag not needed as failed devices | |
8663 | * will be recorded if array switched to read/write. | |
8664 | * Leaving it set will prevent the device | |
8665 | * from being removed. | |
8666 | */ | |
8667 | rdev_for_each(rdev, mddev) | |
8668 | clear_bit(Blocked, &rdev->flags); | |
7ceb17e8 N |
8669 | /* On a read-only array we can: |
8670 | * - remove failed devices | |
8671 | * - add already-in_sync devices if the array itself | |
8672 | * is in-sync. | |
8673 | * As we only add devices that are already in-sync, | |
8674 | * we can activate the spares immediately. | |
c89a8eee | 8675 | */ |
7ceb17e8 | 8676 | remove_and_add_spares(mddev, NULL); |
8313b8e5 N |
8677 | /* There is no thread, but we need to call |
8678 | * ->spare_active and clear saved_raid_disk | |
8679 | */ | |
2ac295a5 | 8680 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8313b8e5 | 8681 | md_reap_sync_thread(mddev); |
a4a3d26d | 8682 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
8313b8e5 | 8683 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
2953079c | 8684 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
c89a8eee N |
8685 | goto unlock; |
8686 | } | |
8687 | ||
659b254f GJ |
8688 | if (mddev_is_clustered(mddev)) { |
8689 | struct md_rdev *rdev; | |
8690 | /* kick the device if another node issued a | |
8691 | * remove disk. | |
8692 | */ | |
8693 | rdev_for_each(rdev, mddev) { | |
8694 | if (test_and_clear_bit(ClusterRemove, &rdev->flags) && | |
8695 | rdev->raid_disk < 0) | |
8696 | md_kick_rdev_from_array(rdev); | |
8697 | } | |
8698 | } | |
8699 | ||
6497709b | 8700 | if (!mddev->external && !mddev->in_sync) { |
85572d7c | 8701 | spin_lock(&mddev->lock); |
6497709b | 8702 | set_in_sync(mddev); |
85572d7c | 8703 | spin_unlock(&mddev->lock); |
fca4d848 | 8704 | } |
fca4d848 | 8705 | |
2953079c | 8706 | if (mddev->sb_flags) |
850b2b42 | 8707 | md_update_sb(mddev, 0); |
06d91a5f | 8708 | |
1da177e4 LT |
8709 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
8710 | !test_bit(MD_RECOVERY_DONE, &mddev->recovery)) { | |
8711 | /* resync/recovery still happening */ | |
8712 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8713 | goto unlock; | |
8714 | } | |
8715 | if (mddev->sync_thread) { | |
a91d5ac0 | 8716 | md_reap_sync_thread(mddev); |
1da177e4 LT |
8717 | goto unlock; |
8718 | } | |
72a23c21 NB |
8719 | /* Set RUNNING before clearing NEEDED to avoid |
8720 | * any transients in the value of "sync_action". | |
8721 | */ | |
72f36d59 | 8722 | mddev->curr_resync_completed = 0; |
23da422b | 8723 | spin_lock(&mddev->lock); |
72a23c21 | 8724 | set_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
23da422b | 8725 | spin_unlock(&mddev->lock); |
24dd469d N |
8726 | /* Clear some bits that don't mean anything, but |
8727 | * might be left set | |
8728 | */ | |
24dd469d N |
8729 | clear_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8730 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); | |
1da177e4 | 8731 | |
ed209584 N |
8732 | if (!test_and_clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
8733 | test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) | |
ac05f256 | 8734 | goto not_running; |
1da177e4 LT |
8735 | /* no recovery is running. |
8736 | * remove any failed drives, then | |
8737 | * add spares if possible. | |
72f36d59 | 8738 | * Spares are also removed and re-added, to allow |
1da177e4 LT |
8739 | * the personality to fail the re-add. |
8740 | */ | |
1da177e4 | 8741 | |
b4c4c7b8 | 8742 | if (mddev->reshape_position != MaxSector) { |
50ac168a N |
8743 | if (mddev->pers->check_reshape == NULL || |
8744 | mddev->pers->check_reshape(mddev) != 0) | |
b4c4c7b8 | 8745 | /* Cannot proceed */ |
ac05f256 | 8746 | goto not_running; |
b4c4c7b8 | 8747 | set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); |
72a23c21 | 8748 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
746d3207 | 8749 | } else if ((spares = remove_and_add_spares(mddev, NULL))) { |
24dd469d N |
8750 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
8751 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
56ac36d7 | 8752 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
72a23c21 | 8753 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
8754 | } else if (mddev->recovery_cp < MaxSector) { |
8755 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
72a23c21 | 8756 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
8757 | } else if (!test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) |
8758 | /* nothing to be done ... */ | |
ac05f256 | 8759 | goto not_running; |
24dd469d | 8760 | |
1da177e4 | 8761 | if (mddev->pers->sync_request) { |
ef99bf48 | 8762 | if (spares) { |
a654b9d8 N |
8763 | /* We are adding a device or devices to an array |
8764 | * which has the bitmap stored on all devices. | |
8765 | * So make sure all bitmap pages get written | |
8766 | */ | |
8767 | bitmap_write_all(mddev->bitmap); | |
8768 | } | |
ac05f256 N |
8769 | INIT_WORK(&mddev->del_work, md_start_sync); |
8770 | queue_work(md_misc_wq, &mddev->del_work); | |
8771 | goto unlock; | |
1da177e4 | 8772 | } |
ac05f256 | 8773 | not_running: |
72a23c21 NB |
8774 | if (!mddev->sync_thread) { |
8775 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 8776 | wake_up(&resync_wait); |
72a23c21 NB |
8777 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
8778 | &mddev->recovery)) | |
0c3573f1 | 8779 | if (mddev->sysfs_action) |
00bcb4ac | 8780 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
72a23c21 | 8781 | } |
ac05f256 N |
8782 | unlock: |
8783 | wake_up(&mddev->sb_wait); | |
1da177e4 LT |
8784 | mddev_unlock(mddev); |
8785 | } | |
8786 | } | |
6c144d31 | 8787 | EXPORT_SYMBOL(md_check_recovery); |
1da177e4 | 8788 | |
a91d5ac0 JB |
8789 | void md_reap_sync_thread(struct mddev *mddev) |
8790 | { | |
8791 | struct md_rdev *rdev; | |
8792 | ||
8793 | /* resync has finished, collect result */ | |
8794 | md_unregister_thread(&mddev->sync_thread); | |
8795 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
8796 | !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
8797 | /* success...*/ | |
8798 | /* activate any spares */ | |
8799 | if (mddev->pers->spare_active(mddev)) { | |
8800 | sysfs_notify(&mddev->kobj, NULL, | |
8801 | "degraded"); | |
2953079c | 8802 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a91d5ac0 JB |
8803 | } |
8804 | } | |
8805 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
8806 | mddev->pers->finish_reshape) | |
8807 | mddev->pers->finish_reshape(mddev); | |
8808 | ||
8809 | /* If array is no-longer degraded, then any saved_raid_disk | |
f466722c | 8810 | * information must be scrapped. |
a91d5ac0 | 8811 | */ |
f466722c N |
8812 | if (!mddev->degraded) |
8813 | rdev_for_each(rdev, mddev) | |
a91d5ac0 JB |
8814 | rdev->saved_raid_disk = -1; |
8815 | ||
8816 | md_update_sb(mddev, 1); | |
2953079c | 8817 | /* MD_SB_CHANGE_PENDING should be cleared by md_update_sb, so we can |
bb8bf15b GJ |
8818 | * call resync_finish here if MD_CLUSTER_RESYNC_LOCKED is set by |
8819 | * clustered raid */ | |
8820 | if (test_and_clear_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags)) | |
8821 | md_cluster_ops->resync_finish(mddev); | |
a91d5ac0 | 8822 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
ea358cd0 | 8823 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); |
a91d5ac0 JB |
8824 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
8825 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
8826 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
8827 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
f851b60d | 8828 | wake_up(&resync_wait); |
a91d5ac0 JB |
8829 | /* flag recovery needed just to double check */ |
8830 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8831 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8832 | md_new_event(mddev); | |
8833 | if (mddev->event_work.func) | |
8834 | queue_work(md_misc_wq, &mddev->event_work); | |
8835 | } | |
6c144d31 | 8836 | EXPORT_SYMBOL(md_reap_sync_thread); |
a91d5ac0 | 8837 | |
fd01b88c | 8838 | void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev) |
6bfe0b49 | 8839 | { |
00bcb4ac | 8840 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
6bfe0b49 | 8841 | wait_event_timeout(rdev->blocked_wait, |
de393cde N |
8842 | !test_bit(Blocked, &rdev->flags) && |
8843 | !test_bit(BlockedBadBlocks, &rdev->flags), | |
6bfe0b49 DW |
8844 | msecs_to_jiffies(5000)); |
8845 | rdev_dec_pending(rdev, mddev); | |
8846 | } | |
8847 | EXPORT_SYMBOL(md_wait_for_blocked_rdev); | |
8848 | ||
c6563a8c N |
8849 | void md_finish_reshape(struct mddev *mddev) |
8850 | { | |
8851 | /* called be personality module when reshape completes. */ | |
8852 | struct md_rdev *rdev; | |
8853 | ||
8854 | rdev_for_each(rdev, mddev) { | |
8855 | if (rdev->data_offset > rdev->new_data_offset) | |
8856 | rdev->sectors += rdev->data_offset - rdev->new_data_offset; | |
8857 | else | |
8858 | rdev->sectors -= rdev->new_data_offset - rdev->data_offset; | |
8859 | rdev->data_offset = rdev->new_data_offset; | |
8860 | } | |
8861 | } | |
8862 | EXPORT_SYMBOL(md_finish_reshape); | |
2230dfe4 | 8863 | |
fc974ee2 | 8864 | /* Bad block management */ |
2230dfe4 | 8865 | |
fc974ee2 | 8866 | /* Returns 1 on success, 0 on failure */ |
3cb03002 | 8867 | int rdev_set_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
c6563a8c | 8868 | int is_new) |
2230dfe4 | 8869 | { |
85ad1d13 | 8870 | struct mddev *mddev = rdev->mddev; |
c6563a8c N |
8871 | int rv; |
8872 | if (is_new) | |
8873 | s += rdev->new_data_offset; | |
8874 | else | |
8875 | s += rdev->data_offset; | |
fc974ee2 VV |
8876 | rv = badblocks_set(&rdev->badblocks, s, sectors, 0); |
8877 | if (rv == 0) { | |
2230dfe4 | 8878 | /* Make sure they get written out promptly */ |
35b785f7 TM |
8879 | if (test_bit(ExternalBbl, &rdev->flags)) |
8880 | sysfs_notify(&rdev->kobj, NULL, | |
8881 | "unacknowledged_bad_blocks"); | |
8bd2f0a0 | 8882 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
2953079c SL |
8883 | set_mask_bits(&mddev->sb_flags, 0, |
8884 | BIT(MD_SB_CHANGE_CLEAN) | BIT(MD_SB_CHANGE_PENDING)); | |
2230dfe4 | 8885 | md_wakeup_thread(rdev->mddev->thread); |
fc974ee2 VV |
8886 | return 1; |
8887 | } else | |
8888 | return 0; | |
2230dfe4 N |
8889 | } |
8890 | EXPORT_SYMBOL_GPL(rdev_set_badblocks); | |
8891 | ||
c6563a8c N |
8892 | int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
8893 | int is_new) | |
2230dfe4 | 8894 | { |
35b785f7 | 8895 | int rv; |
c6563a8c N |
8896 | if (is_new) |
8897 | s += rdev->new_data_offset; | |
8898 | else | |
8899 | s += rdev->data_offset; | |
35b785f7 TM |
8900 | rv = badblocks_clear(&rdev->badblocks, s, sectors); |
8901 | if ((rv == 0) && test_bit(ExternalBbl, &rdev->flags)) | |
8902 | sysfs_notify(&rdev->kobj, NULL, "bad_blocks"); | |
8903 | return rv; | |
2230dfe4 N |
8904 | } |
8905 | EXPORT_SYMBOL_GPL(rdev_clear_badblocks); | |
8906 | ||
75c96f85 AB |
8907 | static int md_notify_reboot(struct notifier_block *this, |
8908 | unsigned long code, void *x) | |
1da177e4 LT |
8909 | { |
8910 | struct list_head *tmp; | |
fd01b88c | 8911 | struct mddev *mddev; |
2dba6a91 | 8912 | int need_delay = 0; |
1da177e4 | 8913 | |
c744a65c N |
8914 | for_each_mddev(mddev, tmp) { |
8915 | if (mddev_trylock(mddev)) { | |
30b8aa91 N |
8916 | if (mddev->pers) |
8917 | __md_stop_writes(mddev); | |
0f62fb22 N |
8918 | if (mddev->persistent) |
8919 | mddev->safemode = 2; | |
c744a65c | 8920 | mddev_unlock(mddev); |
2dba6a91 | 8921 | } |
c744a65c | 8922 | need_delay = 1; |
1da177e4 | 8923 | } |
c744a65c N |
8924 | /* |
8925 | * certain more exotic SCSI devices are known to be | |
8926 | * volatile wrt too early system reboots. While the | |
8927 | * right place to handle this issue is the given | |
8928 | * driver, we do want to have a safe RAID driver ... | |
8929 | */ | |
8930 | if (need_delay) | |
8931 | mdelay(1000*1); | |
8932 | ||
1da177e4 LT |
8933 | return NOTIFY_DONE; |
8934 | } | |
8935 | ||
75c96f85 | 8936 | static struct notifier_block md_notifier = { |
1da177e4 LT |
8937 | .notifier_call = md_notify_reboot, |
8938 | .next = NULL, | |
8939 | .priority = INT_MAX, /* before any real devices */ | |
8940 | }; | |
8941 | ||
8942 | static void md_geninit(void) | |
8943 | { | |
36a4e1fe | 8944 | pr_debug("md: sizeof(mdp_super_t) = %d\n", (int)sizeof(mdp_super_t)); |
1da177e4 | 8945 | |
c7705f34 | 8946 | proc_create("mdstat", S_IRUGO, NULL, &md_seq_fops); |
1da177e4 LT |
8947 | } |
8948 | ||
75c96f85 | 8949 | static int __init md_init(void) |
1da177e4 | 8950 | { |
e804ac78 TH |
8951 | int ret = -ENOMEM; |
8952 | ||
ada609ee | 8953 | md_wq = alloc_workqueue("md", WQ_MEM_RECLAIM, 0); |
e804ac78 TH |
8954 | if (!md_wq) |
8955 | goto err_wq; | |
8956 | ||
8957 | md_misc_wq = alloc_workqueue("md_misc", 0, 0); | |
8958 | if (!md_misc_wq) | |
8959 | goto err_misc_wq; | |
8960 | ||
8961 | if ((ret = register_blkdev(MD_MAJOR, "md")) < 0) | |
8962 | goto err_md; | |
8963 | ||
8964 | if ((ret = register_blkdev(0, "mdp")) < 0) | |
8965 | goto err_mdp; | |
8966 | mdp_major = ret; | |
8967 | ||
af5628f0 | 8968 | blk_register_region(MKDEV(MD_MAJOR, 0), 512, THIS_MODULE, |
e8703fe1 N |
8969 | md_probe, NULL, NULL); |
8970 | blk_register_region(MKDEV(mdp_major, 0), 1UL<<MINORBITS, THIS_MODULE, | |
1da177e4 LT |
8971 | md_probe, NULL, NULL); |
8972 | ||
1da177e4 | 8973 | register_reboot_notifier(&md_notifier); |
0b4d4147 | 8974 | raid_table_header = register_sysctl_table(raid_root_table); |
1da177e4 LT |
8975 | |
8976 | md_geninit(); | |
d710e138 | 8977 | return 0; |
1da177e4 | 8978 | |
e804ac78 TH |
8979 | err_mdp: |
8980 | unregister_blkdev(MD_MAJOR, "md"); | |
8981 | err_md: | |
8982 | destroy_workqueue(md_misc_wq); | |
8983 | err_misc_wq: | |
8984 | destroy_workqueue(md_wq); | |
8985 | err_wq: | |
8986 | return ret; | |
8987 | } | |
1da177e4 | 8988 | |
70bcecdb | 8989 | static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev) |
1d7e3e96 | 8990 | { |
70bcecdb GR |
8991 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
8992 | struct md_rdev *rdev2; | |
8993 | int role, ret; | |
8994 | char b[BDEVNAME_SIZE]; | |
1d7e3e96 | 8995 | |
818da59f GJ |
8996 | /* |
8997 | * If size is changed in another node then we need to | |
8998 | * do resize as well. | |
8999 | */ | |
9000 | if (mddev->dev_sectors != le64_to_cpu(sb->size)) { | |
9001 | ret = mddev->pers->resize(mddev, le64_to_cpu(sb->size)); | |
9002 | if (ret) | |
9003 | pr_info("md-cluster: resize failed\n"); | |
9004 | else | |
9005 | bitmap_update_sb(mddev->bitmap); | |
9006 | } | |
9007 | ||
70bcecdb GR |
9008 | /* Check for change of roles in the active devices */ |
9009 | rdev_for_each(rdev2, mddev) { | |
9010 | if (test_bit(Faulty, &rdev2->flags)) | |
9011 | continue; | |
9012 | ||
9013 | /* Check if the roles changed */ | |
9014 | role = le16_to_cpu(sb->dev_roles[rdev2->desc_nr]); | |
dbb64f86 GR |
9015 | |
9016 | if (test_bit(Candidate, &rdev2->flags)) { | |
9017 | if (role == 0xfffe) { | |
9018 | pr_info("md: Removing Candidate device %s because add failed\n", bdevname(rdev2->bdev,b)); | |
9019 | md_kick_rdev_from_array(rdev2); | |
9020 | continue; | |
9021 | } | |
9022 | else | |
9023 | clear_bit(Candidate, &rdev2->flags); | |
9024 | } | |
9025 | ||
70bcecdb GR |
9026 | if (role != rdev2->raid_disk) { |
9027 | /* got activated */ | |
9028 | if (rdev2->raid_disk == -1 && role != 0xffff) { | |
9029 | rdev2->saved_raid_disk = role; | |
9030 | ret = remove_and_add_spares(mddev, rdev2); | |
9031 | pr_info("Activated spare: %s\n", | |
9d48739e | 9032 | bdevname(rdev2->bdev,b)); |
a578183e GJ |
9033 | /* wakeup mddev->thread here, so array could |
9034 | * perform resync with the new activated disk */ | |
9035 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9036 | md_wakeup_thread(mddev->thread); | |
9037 | ||
70bcecdb GR |
9038 | } |
9039 | /* device faulty | |
9040 | * We just want to do the minimum to mark the disk | |
9041 | * as faulty. The recovery is performed by the | |
9042 | * one who initiated the error. | |
9043 | */ | |
9044 | if ((role == 0xfffe) || (role == 0xfffd)) { | |
9045 | md_error(mddev, rdev2); | |
9046 | clear_bit(Blocked, &rdev2->flags); | |
9047 | } | |
9048 | } | |
1d7e3e96 | 9049 | } |
70bcecdb | 9050 | |
28c1b9fd GR |
9051 | if (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) |
9052 | update_raid_disks(mddev, le32_to_cpu(sb->raid_disks)); | |
70bcecdb GR |
9053 | |
9054 | /* Finally set the event to be up to date */ | |
9055 | mddev->events = le64_to_cpu(sb->events); | |
9056 | } | |
9057 | ||
9058 | static int read_rdev(struct mddev *mddev, struct md_rdev *rdev) | |
9059 | { | |
9060 | int err; | |
9061 | struct page *swapout = rdev->sb_page; | |
9062 | struct mdp_superblock_1 *sb; | |
9063 | ||
9064 | /* Store the sb page of the rdev in the swapout temporary | |
9065 | * variable in case we err in the future | |
9066 | */ | |
9067 | rdev->sb_page = NULL; | |
7f0f0d87 N |
9068 | err = alloc_disk_sb(rdev); |
9069 | if (err == 0) { | |
9070 | ClearPageUptodate(rdev->sb_page); | |
9071 | rdev->sb_loaded = 0; | |
9072 | err = super_types[mddev->major_version]. | |
9073 | load_super(rdev, NULL, mddev->minor_version); | |
9074 | } | |
70bcecdb GR |
9075 | if (err < 0) { |
9076 | pr_warn("%s: %d Could not reload rdev(%d) err: %d. Restoring old values\n", | |
9077 | __func__, __LINE__, rdev->desc_nr, err); | |
7f0f0d87 N |
9078 | if (rdev->sb_page) |
9079 | put_page(rdev->sb_page); | |
70bcecdb GR |
9080 | rdev->sb_page = swapout; |
9081 | rdev->sb_loaded = 1; | |
9082 | return err; | |
1d7e3e96 GR |
9083 | } |
9084 | ||
70bcecdb GR |
9085 | sb = page_address(rdev->sb_page); |
9086 | /* Read the offset unconditionally, even if MD_FEATURE_RECOVERY_OFFSET | |
9087 | * is not set | |
9088 | */ | |
9089 | ||
9090 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)) | |
9091 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); | |
9092 | ||
9093 | /* The other node finished recovery, call spare_active to set | |
9094 | * device In_sync and mddev->degraded | |
9095 | */ | |
9096 | if (rdev->recovery_offset == MaxSector && | |
9097 | !test_bit(In_sync, &rdev->flags) && | |
9098 | mddev->pers->spare_active(mddev)) | |
9099 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
9100 | ||
9101 | put_page(swapout); | |
9102 | return 0; | |
9103 | } | |
9104 | ||
9105 | void md_reload_sb(struct mddev *mddev, int nr) | |
9106 | { | |
9107 | struct md_rdev *rdev; | |
9108 | int err; | |
9109 | ||
9110 | /* Find the rdev */ | |
9111 | rdev_for_each_rcu(rdev, mddev) { | |
9112 | if (rdev->desc_nr == nr) | |
9113 | break; | |
9114 | } | |
9115 | ||
9116 | if (!rdev || rdev->desc_nr != nr) { | |
9117 | pr_warn("%s: %d Could not find rdev with nr %d\n", __func__, __LINE__, nr); | |
9118 | return; | |
9119 | } | |
9120 | ||
9121 | err = read_rdev(mddev, rdev); | |
9122 | if (err < 0) | |
9123 | return; | |
9124 | ||
9125 | check_sb_changes(mddev, rdev); | |
9126 | ||
9127 | /* Read all rdev's to update recovery_offset */ | |
9128 | rdev_for_each_rcu(rdev, mddev) | |
9129 | read_rdev(mddev, rdev); | |
1d7e3e96 GR |
9130 | } |
9131 | EXPORT_SYMBOL(md_reload_sb); | |
9132 | ||
1da177e4 LT |
9133 | #ifndef MODULE |
9134 | ||
9135 | /* | |
9136 | * Searches all registered partitions for autorun RAID arrays | |
9137 | * at boot time. | |
9138 | */ | |
4d936ec1 | 9139 | |
5b1f5bc3 | 9140 | static DEFINE_MUTEX(detected_devices_mutex); |
4d936ec1 ME |
9141 | static LIST_HEAD(all_detected_devices); |
9142 | struct detected_devices_node { | |
9143 | struct list_head list; | |
9144 | dev_t dev; | |
9145 | }; | |
1da177e4 LT |
9146 | |
9147 | void md_autodetect_dev(dev_t dev) | |
9148 | { | |
4d936ec1 ME |
9149 | struct detected_devices_node *node_detected_dev; |
9150 | ||
9151 | node_detected_dev = kzalloc(sizeof(*node_detected_dev), GFP_KERNEL); | |
9152 | if (node_detected_dev) { | |
9153 | node_detected_dev->dev = dev; | |
5b1f5bc3 | 9154 | mutex_lock(&detected_devices_mutex); |
4d936ec1 | 9155 | list_add_tail(&node_detected_dev->list, &all_detected_devices); |
5b1f5bc3 | 9156 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9157 | } |
1da177e4 LT |
9158 | } |
9159 | ||
1da177e4 LT |
9160 | static void autostart_arrays(int part) |
9161 | { | |
3cb03002 | 9162 | struct md_rdev *rdev; |
4d936ec1 ME |
9163 | struct detected_devices_node *node_detected_dev; |
9164 | dev_t dev; | |
9165 | int i_scanned, i_passed; | |
1da177e4 | 9166 | |
4d936ec1 ME |
9167 | i_scanned = 0; |
9168 | i_passed = 0; | |
1da177e4 | 9169 | |
9d48739e | 9170 | pr_info("md: Autodetecting RAID arrays.\n"); |
1da177e4 | 9171 | |
5b1f5bc3 | 9172 | mutex_lock(&detected_devices_mutex); |
4d936ec1 ME |
9173 | while (!list_empty(&all_detected_devices) && i_scanned < INT_MAX) { |
9174 | i_scanned++; | |
9175 | node_detected_dev = list_entry(all_detected_devices.next, | |
9176 | struct detected_devices_node, list); | |
9177 | list_del(&node_detected_dev->list); | |
9178 | dev = node_detected_dev->dev; | |
9179 | kfree(node_detected_dev); | |
90bcf133 | 9180 | mutex_unlock(&detected_devices_mutex); |
df968c4e | 9181 | rdev = md_import_device(dev,0, 90); |
90bcf133 | 9182 | mutex_lock(&detected_devices_mutex); |
1da177e4 LT |
9183 | if (IS_ERR(rdev)) |
9184 | continue; | |
9185 | ||
403df478 | 9186 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 9187 | continue; |
403df478 | 9188 | |
d0fae18f | 9189 | set_bit(AutoDetected, &rdev->flags); |
1da177e4 | 9190 | list_add(&rdev->same_set, &pending_raid_disks); |
4d936ec1 | 9191 | i_passed++; |
1da177e4 | 9192 | } |
5b1f5bc3 | 9193 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9194 | |
9d48739e | 9195 | pr_debug("md: Scanned %d and added %d devices.\n", i_scanned, i_passed); |
1da177e4 LT |
9196 | |
9197 | autorun_devices(part); | |
9198 | } | |
9199 | ||
fdee8ae4 | 9200 | #endif /* !MODULE */ |
1da177e4 LT |
9201 | |
9202 | static __exit void md_exit(void) | |
9203 | { | |
fd01b88c | 9204 | struct mddev *mddev; |
1da177e4 | 9205 | struct list_head *tmp; |
e2f23b60 | 9206 | int delay = 1; |
8ab5e4c1 | 9207 | |
af5628f0 | 9208 | blk_unregister_region(MKDEV(MD_MAJOR,0), 512); |
e8703fe1 | 9209 | blk_unregister_region(MKDEV(mdp_major,0), 1U << MINORBITS); |
1da177e4 | 9210 | |
3dbd8c2e | 9211 | unregister_blkdev(MD_MAJOR,"md"); |
1da177e4 LT |
9212 | unregister_blkdev(mdp_major, "mdp"); |
9213 | unregister_reboot_notifier(&md_notifier); | |
9214 | unregister_sysctl_table(raid_table_header); | |
e2f23b60 N |
9215 | |
9216 | /* We cannot unload the modules while some process is | |
9217 | * waiting for us in select() or poll() - wake them up | |
9218 | */ | |
9219 | md_unloading = 1; | |
9220 | while (waitqueue_active(&md_event_waiters)) { | |
9221 | /* not safe to leave yet */ | |
9222 | wake_up(&md_event_waiters); | |
9223 | msleep(delay); | |
9224 | delay += delay; | |
9225 | } | |
1da177e4 | 9226 | remove_proc_entry("mdstat", NULL); |
e2f23b60 | 9227 | |
29ac4aa3 | 9228 | for_each_mddev(mddev, tmp) { |
1da177e4 | 9229 | export_array(mddev); |
9356863c | 9230 | mddev->ctime = 0; |
d3374825 | 9231 | mddev->hold_active = 0; |
9356863c N |
9232 | /* |
9233 | * for_each_mddev() will call mddev_put() at the end of each | |
9234 | * iteration. As the mddev is now fully clear, this will | |
9235 | * schedule the mddev for destruction by a workqueue, and the | |
9236 | * destroy_workqueue() below will wait for that to complete. | |
9237 | */ | |
1da177e4 | 9238 | } |
e804ac78 TH |
9239 | destroy_workqueue(md_misc_wq); |
9240 | destroy_workqueue(md_wq); | |
1da177e4 LT |
9241 | } |
9242 | ||
685784aa | 9243 | subsys_initcall(md_init); |
1da177e4 LT |
9244 | module_exit(md_exit) |
9245 | ||
f91de92e N |
9246 | static int get_ro(char *buffer, struct kernel_param *kp) |
9247 | { | |
9248 | return sprintf(buffer, "%d", start_readonly); | |
9249 | } | |
9250 | static int set_ro(const char *val, struct kernel_param *kp) | |
9251 | { | |
4c9309c0 | 9252 | return kstrtouint(val, 10, (unsigned int *)&start_readonly); |
f91de92e N |
9253 | } |
9254 | ||
80ca3a44 N |
9255 | module_param_call(start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR); |
9256 | module_param(start_dirty_degraded, int, S_IRUGO|S_IWUSR); | |
efeb53c0 | 9257 | module_param_call(new_array, add_named_array, NULL, NULL, S_IWUSR); |
78b6350d | 9258 | module_param(create_on_open, bool, S_IRUSR|S_IWUSR); |
f91de92e | 9259 | |
1da177e4 | 9260 | MODULE_LICENSE("GPL"); |
0efb9e61 | 9261 | MODULE_DESCRIPTION("MD RAID framework"); |
aa1595e9 | 9262 | MODULE_ALIAS("md"); |
72008652 | 9263 | MODULE_ALIAS_BLOCKDEV_MAJOR(MD_MAJOR); |