]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | md.c : Multiple Devices driver for Linux | |
f72ffdd6 | 3 | Copyright (C) 1998, 1999, 2000 Ingo Molnar |
1da177e4 LT |
4 | |
5 | completely rewritten, based on the MD driver code from Marc Zyngier | |
6 | ||
7 | Changes: | |
8 | ||
9 | - RAID-1/RAID-5 extensions by Miguel de Icaza, Gadi Oxman, Ingo Molnar | |
10 | - RAID-6 extensions by H. Peter Anvin <hpa@zytor.com> | |
11 | - boot support for linear and striped mode by Harald Hoyer <HarryH@Royal.Net> | |
12 | - kerneld support by Boris Tobotras <boris@xtalk.msk.su> | |
13 | - kmod support by: Cyrus Durgin | |
14 | - RAID0 bugfixes: Mark Anthony Lisher <markal@iname.com> | |
15 | - Devfs support by Richard Gooch <rgooch@atnf.csiro.au> | |
16 | ||
17 | - lots of fixes and improvements to the RAID1/RAID5 and generic | |
18 | RAID code (such as request based resynchronization): | |
19 | ||
20 | Neil Brown <neilb@cse.unsw.edu.au>. | |
21 | ||
32a7627c N |
22 | - persistent bitmap code |
23 | Copyright (C) 2003-2004, Paul Clements, SteelEye Technology, Inc. | |
24 | ||
1da177e4 LT |
25 | This program is free software; you can redistribute it and/or modify |
26 | it under the terms of the GNU General Public License as published by | |
27 | the Free Software Foundation; either version 2, or (at your option) | |
28 | any later version. | |
29 | ||
30 | You should have received a copy of the GNU General Public License | |
31 | (for example /usr/src/linux/COPYING); if not, write to the Free | |
32 | Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
9d48739e N |
33 | |
34 | Errors, Warnings, etc. | |
35 | Please use: | |
36 | pr_crit() for error conditions that risk data loss | |
37 | pr_err() for error conditions that are unexpected, like an IO error | |
38 | or internal inconsistency | |
39 | pr_warn() for error conditions that could have been predicated, like | |
40 | adding a device to an array when it has incompatible metadata | |
41 | pr_info() for every interesting, very rare events, like an array starting | |
42 | or stopping, or resync starting or stopping | |
43 | pr_debug() for everything else. | |
44 | ||
1da177e4 LT |
45 | */ |
46 | ||
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" |
935fe098 | 72 | #include "md-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 | */ | |
b3143b9a N |
269 | static bool is_suspended(struct mddev *mddev, struct bio *bio) |
270 | { | |
271 | if (mddev->suspended) | |
272 | return true; | |
273 | if (bio_data_dir(bio) != WRITE) | |
274 | return false; | |
275 | if (mddev->suspend_lo >= mddev->suspend_hi) | |
276 | return false; | |
277 | if (bio->bi_iter.bi_sector >= mddev->suspend_hi) | |
278 | return false; | |
279 | if (bio_end_sector(bio) < mddev->suspend_lo) | |
280 | return false; | |
281 | return true; | |
282 | } | |
283 | ||
393debc2 SL |
284 | void md_handle_request(struct mddev *mddev, struct bio *bio) |
285 | { | |
286 | check_suspended: | |
287 | rcu_read_lock(); | |
b3143b9a | 288 | if (is_suspended(mddev, bio)) { |
393debc2 SL |
289 | DEFINE_WAIT(__wait); |
290 | for (;;) { | |
291 | prepare_to_wait(&mddev->sb_wait, &__wait, | |
292 | TASK_UNINTERRUPTIBLE); | |
b3143b9a | 293 | if (!is_suspended(mddev, bio)) |
393debc2 SL |
294 | break; |
295 | rcu_read_unlock(); | |
296 | schedule(); | |
297 | rcu_read_lock(); | |
298 | } | |
299 | finish_wait(&mddev->sb_wait, &__wait); | |
300 | } | |
301 | atomic_inc(&mddev->active_io); | |
302 | rcu_read_unlock(); | |
303 | ||
304 | if (!mddev->pers->make_request(mddev, bio)) { | |
305 | atomic_dec(&mddev->active_io); | |
306 | wake_up(&mddev->sb_wait); | |
307 | goto check_suspended; | |
308 | } | |
309 | ||
310 | if (atomic_dec_and_test(&mddev->active_io) && mddev->suspended) | |
311 | wake_up(&mddev->sb_wait); | |
312 | } | |
313 | EXPORT_SYMBOL(md_handle_request); | |
314 | ||
dece1635 | 315 | static blk_qc_t md_make_request(struct request_queue *q, struct bio *bio) |
1da177e4 | 316 | { |
49077326 | 317 | const int rw = bio_data_dir(bio); |
fd01b88c | 318 | struct mddev *mddev = q->queuedata; |
e91ece55 | 319 | unsigned int sectors; |
74672d06 | 320 | int cpu; |
49077326 | 321 | |
af67c31f | 322 | blk_queue_split(q, &bio); |
54efd50b | 323 | |
274d8cbd | 324 | if (mddev == NULL || mddev->pers == NULL) { |
409c57f3 | 325 | bio_io_error(bio); |
dece1635 | 326 | return BLK_QC_T_NONE; |
409c57f3 | 327 | } |
bbfa57c0 | 328 | if (mddev->ro == 1 && unlikely(rw == WRITE)) { |
4246a0b6 | 329 | if (bio_sectors(bio) != 0) |
4e4cbee9 | 330 | bio->bi_status = BLK_STS_IOERR; |
4246a0b6 | 331 | bio_endio(bio); |
dece1635 | 332 | return BLK_QC_T_NONE; |
bbfa57c0 | 333 | } |
49077326 | 334 | |
e91ece55 CM |
335 | /* |
336 | * save the sectors now since our bio can | |
337 | * go away inside make_request | |
338 | */ | |
339 | sectors = bio_sectors(bio); | |
9c573de3 | 340 | /* bio could be mergeable after passing to underlayer */ |
1eff9d32 | 341 | bio->bi_opf &= ~REQ_NOMERGE; |
393debc2 SL |
342 | |
343 | md_handle_request(mddev, bio); | |
49077326 | 344 | |
74672d06 GZ |
345 | cpu = part_stat_lock(); |
346 | part_stat_inc(cpu, &mddev->gendisk->part0, ios[rw]); | |
347 | part_stat_add(cpu, &mddev->gendisk->part0, sectors[rw], sectors); | |
348 | part_stat_unlock(); | |
49077326 | 349 | |
dece1635 | 350 | return BLK_QC_T_NONE; |
409c57f3 N |
351 | } |
352 | ||
9e35b99c N |
353 | /* mddev_suspend makes sure no new requests are submitted |
354 | * to the device, and that any requests that have been submitted | |
355 | * are completely handled. | |
afa0f557 N |
356 | * Once mddev_detach() is called and completes, the module will be |
357 | * completely unused. | |
9e35b99c | 358 | */ |
fd01b88c | 359 | void mddev_suspend(struct mddev *mddev) |
409c57f3 | 360 | { |
092398dc | 361 | WARN_ON_ONCE(mddev->thread && current == mddev->thread->tsk); |
4d5324f7 | 362 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
363 | if (mddev->suspended++) |
364 | return; | |
409c57f3 | 365 | synchronize_rcu(); |
cc27b0c7 | 366 | wake_up(&mddev->sb_wait); |
35bfc521 N |
367 | set_bit(MD_ALLOW_SB_UPDATE, &mddev->flags); |
368 | smp_mb__after_atomic(); | |
409c57f3 N |
369 | wait_event(mddev->sb_wait, atomic_read(&mddev->active_io) == 0); |
370 | mddev->pers->quiesce(mddev, 1); | |
35bfc521 N |
371 | clear_bit_unlock(MD_ALLOW_SB_UPDATE, &mddev->flags); |
372 | wait_event(mddev->sb_wait, !test_bit(MD_UPDATING_SB, &mddev->flags)); | |
0d9f4f13 JB |
373 | |
374 | del_timer_sync(&mddev->safemode_timer); | |
409c57f3 | 375 | } |
390ee602 | 376 | EXPORT_SYMBOL_GPL(mddev_suspend); |
409c57f3 | 377 | |
fd01b88c | 378 | void mddev_resume(struct mddev *mddev) |
409c57f3 | 379 | { |
4d5324f7 | 380 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
381 | if (--mddev->suspended) |
382 | return; | |
409c57f3 N |
383 | wake_up(&mddev->sb_wait); |
384 | mddev->pers->quiesce(mddev, 0); | |
0fd018af | 385 | |
47525e59 | 386 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
0fd018af JB |
387 | md_wakeup_thread(mddev->thread); |
388 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
1da177e4 | 389 | } |
390ee602 | 390 | EXPORT_SYMBOL_GPL(mddev_resume); |
1da177e4 | 391 | |
fd01b88c | 392 | int mddev_congested(struct mddev *mddev, int bits) |
3fa841d7 | 393 | { |
5c675f83 N |
394 | struct md_personality *pers = mddev->pers; |
395 | int ret = 0; | |
396 | ||
397 | rcu_read_lock(); | |
398 | if (mddev->suspended) | |
399 | ret = 1; | |
400 | else if (pers && pers->congested) | |
401 | ret = pers->congested(mddev, bits); | |
402 | rcu_read_unlock(); | |
403 | return ret; | |
404 | } | |
405 | EXPORT_SYMBOL_GPL(mddev_congested); | |
406 | static int md_congested(void *data, int bits) | |
407 | { | |
408 | struct mddev *mddev = data; | |
409 | return mddev_congested(mddev, bits); | |
3fa841d7 | 410 | } |
3fa841d7 | 411 | |
a2826aa9 | 412 | /* |
e9c7469b | 413 | * Generic flush handling for md |
a2826aa9 N |
414 | */ |
415 | ||
4246a0b6 | 416 | static void md_end_flush(struct bio *bio) |
a2826aa9 | 417 | { |
3cb03002 | 418 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 419 | struct mddev *mddev = rdev->mddev; |
a2826aa9 N |
420 | |
421 | rdev_dec_pending(rdev, mddev); | |
422 | ||
423 | if (atomic_dec_and_test(&mddev->flush_pending)) { | |
e9c7469b | 424 | /* The pre-request flush has finished */ |
e804ac78 | 425 | queue_work(md_wq, &mddev->flush_work); |
a2826aa9 N |
426 | } |
427 | bio_put(bio); | |
428 | } | |
429 | ||
a7a07e69 N |
430 | static void md_submit_flush_data(struct work_struct *ws); |
431 | ||
a035fc3e | 432 | static void submit_flushes(struct work_struct *ws) |
a2826aa9 | 433 | { |
fd01b88c | 434 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); |
3cb03002 | 435 | struct md_rdev *rdev; |
a2826aa9 | 436 | |
a7a07e69 N |
437 | INIT_WORK(&mddev->flush_work, md_submit_flush_data); |
438 | atomic_set(&mddev->flush_pending, 1); | |
a2826aa9 | 439 | rcu_read_lock(); |
dafb20fa | 440 | rdev_for_each_rcu(rdev, mddev) |
a2826aa9 N |
441 | if (rdev->raid_disk >= 0 && |
442 | !test_bit(Faulty, &rdev->flags)) { | |
443 | /* Take two references, one is dropped | |
444 | * when request finishes, one after | |
445 | * we reclaim rcu_read_lock | |
446 | */ | |
447 | struct bio *bi; | |
448 | atomic_inc(&rdev->nr_pending); | |
449 | atomic_inc(&rdev->nr_pending); | |
450 | rcu_read_unlock(); | |
b5e1b8ce | 451 | bi = bio_alloc_mddev(GFP_NOIO, 0, mddev); |
e9c7469b | 452 | bi->bi_end_io = md_end_flush; |
a2826aa9 | 453 | bi->bi_private = rdev; |
74d46992 | 454 | bio_set_dev(bi, rdev->bdev); |
70fd7614 | 455 | bi->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH; |
a2826aa9 | 456 | atomic_inc(&mddev->flush_pending); |
4e49ea4a | 457 | submit_bio(bi); |
a2826aa9 N |
458 | rcu_read_lock(); |
459 | rdev_dec_pending(rdev, mddev); | |
460 | } | |
461 | rcu_read_unlock(); | |
a7a07e69 N |
462 | if (atomic_dec_and_test(&mddev->flush_pending)) |
463 | queue_work(md_wq, &mddev->flush_work); | |
a2826aa9 N |
464 | } |
465 | ||
e9c7469b | 466 | static void md_submit_flush_data(struct work_struct *ws) |
a2826aa9 | 467 | { |
fd01b88c | 468 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); |
e9c7469b | 469 | struct bio *bio = mddev->flush_bio; |
a2826aa9 | 470 | |
79bf31a3 SL |
471 | /* |
472 | * must reset flush_bio before calling into md_handle_request to avoid a | |
473 | * deadlock, because other bios passed md_handle_request suspend check | |
474 | * could wait for this and below md_handle_request could wait for those | |
475 | * bios because of suspend check | |
476 | */ | |
477 | mddev->flush_bio = NULL; | |
478 | wake_up(&mddev->sb_wait); | |
479 | ||
4f024f37 | 480 | if (bio->bi_iter.bi_size == 0) |
a2826aa9 | 481 | /* an empty barrier - all done */ |
4246a0b6 | 482 | bio_endio(bio); |
a2826aa9 | 483 | else { |
1eff9d32 | 484 | bio->bi_opf &= ~REQ_PREFLUSH; |
79bf31a3 | 485 | md_handle_request(mddev, bio); |
a2826aa9 | 486 | } |
a2826aa9 N |
487 | } |
488 | ||
fd01b88c | 489 | void md_flush_request(struct mddev *mddev, struct bio *bio) |
a2826aa9 | 490 | { |
85572d7c | 491 | spin_lock_irq(&mddev->lock); |
a2826aa9 | 492 | wait_event_lock_irq(mddev->sb_wait, |
e9c7469b | 493 | !mddev->flush_bio, |
85572d7c | 494 | mddev->lock); |
e9c7469b | 495 | mddev->flush_bio = bio; |
85572d7c | 496 | spin_unlock_irq(&mddev->lock); |
a2826aa9 | 497 | |
a035fc3e N |
498 | INIT_WORK(&mddev->flush_work, submit_flushes); |
499 | queue_work(md_wq, &mddev->flush_work); | |
a2826aa9 | 500 | } |
e9c7469b | 501 | EXPORT_SYMBOL(md_flush_request); |
409c57f3 | 502 | |
fd01b88c | 503 | static inline struct mddev *mddev_get(struct mddev *mddev) |
1da177e4 LT |
504 | { |
505 | atomic_inc(&mddev->active); | |
506 | return mddev; | |
507 | } | |
508 | ||
5fd3a17e | 509 | static void mddev_delayed_delete(struct work_struct *ws); |
d3374825 | 510 | |
fd01b88c | 511 | static void mddev_put(struct mddev *mddev) |
1da177e4 | 512 | { |
7184ef8b | 513 | struct bio_set *bs = NULL, *sync_bs = NULL; |
a167f663 | 514 | |
1da177e4 LT |
515 | if (!atomic_dec_and_lock(&mddev->active, &all_mddevs_lock)) |
516 | return; | |
d3374825 | 517 | if (!mddev->raid_disks && list_empty(&mddev->disks) && |
cbd19983 N |
518 | mddev->ctime == 0 && !mddev->hold_active) { |
519 | /* Array is not configured at all, and not held active, | |
520 | * so destroy it */ | |
af8a2434 | 521 | list_del_init(&mddev->all_mddevs); |
a167f663 | 522 | bs = mddev->bio_set; |
7184ef8b | 523 | sync_bs = mddev->sync_set; |
a167f663 | 524 | mddev->bio_set = NULL; |
5a85071c | 525 | mddev->sync_set = NULL; |
d3374825 | 526 | if (mddev->gendisk) { |
e804ac78 TH |
527 | /* We did a probe so need to clean up. Call |
528 | * queue_work inside the spinlock so that | |
529 | * flush_workqueue() after mddev_find will | |
530 | * succeed in waiting for the work to be done. | |
d3374825 N |
531 | */ |
532 | INIT_WORK(&mddev->del_work, mddev_delayed_delete); | |
e804ac78 | 533 | queue_work(md_misc_wq, &mddev->del_work); |
d3374825 N |
534 | } else |
535 | kfree(mddev); | |
536 | } | |
537 | spin_unlock(&all_mddevs_lock); | |
a167f663 N |
538 | if (bs) |
539 | bioset_free(bs); | |
7184ef8b SL |
540 | if (sync_bs) |
541 | bioset_free(sync_bs); | |
1da177e4 LT |
542 | } |
543 | ||
8376d3c1 | 544 | static void md_safemode_timeout(struct timer_list *t); |
25b2edfa | 545 | |
fd01b88c | 546 | void mddev_init(struct mddev *mddev) |
fafd7fb0 N |
547 | { |
548 | mutex_init(&mddev->open_mutex); | |
549 | mutex_init(&mddev->reconfig_mutex); | |
550 | mutex_init(&mddev->bitmap_info.mutex); | |
551 | INIT_LIST_HEAD(&mddev->disks); | |
552 | INIT_LIST_HEAD(&mddev->all_mddevs); | |
8376d3c1 | 553 | timer_setup(&mddev->safemode_timer, md_safemode_timeout, 0); |
fafd7fb0 N |
554 | atomic_set(&mddev->active, 1); |
555 | atomic_set(&mddev->openers, 0); | |
556 | atomic_set(&mddev->active_io, 0); | |
85572d7c | 557 | spin_lock_init(&mddev->lock); |
fafd7fb0 N |
558 | atomic_set(&mddev->flush_pending, 0); |
559 | init_waitqueue_head(&mddev->sb_wait); | |
560 | init_waitqueue_head(&mddev->recovery_wait); | |
561 | mddev->reshape_position = MaxSector; | |
2c810cdd | 562 | mddev->reshape_backwards = 0; |
c4a39551 | 563 | mddev->last_sync_action = "none"; |
fafd7fb0 N |
564 | mddev->resync_min = 0; |
565 | mddev->resync_max = MaxSector; | |
566 | mddev->level = LEVEL_NONE; | |
567 | } | |
390ee602 | 568 | EXPORT_SYMBOL_GPL(mddev_init); |
fafd7fb0 | 569 | |
f72ffdd6 | 570 | static struct mddev *mddev_find(dev_t unit) |
1da177e4 | 571 | { |
fd01b88c | 572 | struct mddev *mddev, *new = NULL; |
1da177e4 | 573 | |
8f5f02c4 N |
574 | if (unit && MAJOR(unit) != MD_MAJOR) |
575 | unit &= ~((1<<MdpMinorShift)-1); | |
576 | ||
1da177e4 LT |
577 | retry: |
578 | spin_lock(&all_mddevs_lock); | |
efeb53c0 N |
579 | |
580 | if (unit) { | |
581 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
582 | if (mddev->unit == unit) { | |
583 | mddev_get(mddev); | |
584 | spin_unlock(&all_mddevs_lock); | |
585 | kfree(new); | |
586 | return mddev; | |
587 | } | |
588 | ||
589 | if (new) { | |
590 | list_add(&new->all_mddevs, &all_mddevs); | |
1da177e4 | 591 | spin_unlock(&all_mddevs_lock); |
efeb53c0 N |
592 | new->hold_active = UNTIL_IOCTL; |
593 | return new; | |
1da177e4 | 594 | } |
efeb53c0 N |
595 | } else if (new) { |
596 | /* find an unused unit number */ | |
597 | static int next_minor = 512; | |
598 | int start = next_minor; | |
599 | int is_free = 0; | |
600 | int dev = 0; | |
601 | while (!is_free) { | |
602 | dev = MKDEV(MD_MAJOR, next_minor); | |
603 | next_minor++; | |
604 | if (next_minor > MINORMASK) | |
605 | next_minor = 0; | |
606 | if (next_minor == start) { | |
607 | /* Oh dear, all in use. */ | |
608 | spin_unlock(&all_mddevs_lock); | |
609 | kfree(new); | |
610 | return NULL; | |
611 | } | |
f72ffdd6 | 612 | |
efeb53c0 N |
613 | is_free = 1; |
614 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
615 | if (mddev->unit == dev) { | |
616 | is_free = 0; | |
617 | break; | |
618 | } | |
619 | } | |
620 | new->unit = dev; | |
621 | new->md_minor = MINOR(dev); | |
622 | new->hold_active = UNTIL_STOP; | |
1da177e4 LT |
623 | list_add(&new->all_mddevs, &all_mddevs); |
624 | spin_unlock(&all_mddevs_lock); | |
625 | return new; | |
626 | } | |
627 | spin_unlock(&all_mddevs_lock); | |
628 | ||
9ffae0cf | 629 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
1da177e4 LT |
630 | if (!new) |
631 | return NULL; | |
632 | ||
1da177e4 LT |
633 | new->unit = unit; |
634 | if (MAJOR(unit) == MD_MAJOR) | |
635 | new->md_minor = MINOR(unit); | |
636 | else | |
637 | new->md_minor = MINOR(unit) >> MdpMinorShift; | |
638 | ||
fafd7fb0 | 639 | mddev_init(new); |
1da177e4 | 640 | |
1da177e4 LT |
641 | goto retry; |
642 | } | |
643 | ||
b6eb127d N |
644 | static struct attribute_group md_redundancy_group; |
645 | ||
5c47daf6 | 646 | void mddev_unlock(struct mddev *mddev) |
1da177e4 | 647 | { |
a64c876f | 648 | if (mddev->to_remove) { |
b6eb127d N |
649 | /* These cannot be removed under reconfig_mutex as |
650 | * an access to the files will try to take reconfig_mutex | |
651 | * while holding the file unremovable, which leads to | |
652 | * a deadlock. | |
bb4f1e9d N |
653 | * So hold set sysfs_active while the remove in happeing, |
654 | * and anything else which might set ->to_remove or my | |
655 | * otherwise change the sysfs namespace will fail with | |
656 | * -EBUSY if sysfs_active is still set. | |
657 | * We set sysfs_active under reconfig_mutex and elsewhere | |
658 | * test it under the same mutex to ensure its correct value | |
659 | * is seen. | |
b6eb127d | 660 | */ |
a64c876f N |
661 | struct attribute_group *to_remove = mddev->to_remove; |
662 | mddev->to_remove = NULL; | |
bb4f1e9d | 663 | mddev->sysfs_active = 1; |
b6eb127d N |
664 | mutex_unlock(&mddev->reconfig_mutex); |
665 | ||
00bcb4ac N |
666 | if (mddev->kobj.sd) { |
667 | if (to_remove != &md_redundancy_group) | |
668 | sysfs_remove_group(&mddev->kobj, to_remove); | |
669 | if (mddev->pers == NULL || | |
670 | mddev->pers->sync_request == NULL) { | |
671 | sysfs_remove_group(&mddev->kobj, &md_redundancy_group); | |
672 | if (mddev->sysfs_action) | |
673 | sysfs_put(mddev->sysfs_action); | |
674 | mddev->sysfs_action = NULL; | |
675 | } | |
a64c876f | 676 | } |
bb4f1e9d | 677 | mddev->sysfs_active = 0; |
b6eb127d N |
678 | } else |
679 | mutex_unlock(&mddev->reconfig_mutex); | |
1da177e4 | 680 | |
751e67ca CD |
681 | /* As we've dropped the mutex we need a spinlock to |
682 | * make sure the thread doesn't disappear | |
01f96c0a N |
683 | */ |
684 | spin_lock(&pers_lock); | |
005eca5e | 685 | md_wakeup_thread(mddev->thread); |
4d5324f7 | 686 | wake_up(&mddev->sb_wait); |
01f96c0a | 687 | spin_unlock(&pers_lock); |
1da177e4 | 688 | } |
5c47daf6 | 689 | EXPORT_SYMBOL_GPL(mddev_unlock); |
1da177e4 | 690 | |
57d051dc | 691 | struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr) |
1ca69c4b N |
692 | { |
693 | struct md_rdev *rdev; | |
694 | ||
695 | rdev_for_each_rcu(rdev, mddev) | |
696 | if (rdev->desc_nr == nr) | |
697 | return rdev; | |
698 | ||
699 | return NULL; | |
700 | } | |
57d051dc | 701 | EXPORT_SYMBOL_GPL(md_find_rdev_nr_rcu); |
1ca69c4b N |
702 | |
703 | static struct md_rdev *find_rdev(struct mddev *mddev, dev_t dev) | |
1da177e4 | 704 | { |
3cb03002 | 705 | struct md_rdev *rdev; |
1da177e4 | 706 | |
dafb20fa | 707 | rdev_for_each(rdev, mddev) |
1da177e4 LT |
708 | if (rdev->bdev->bd_dev == dev) |
709 | return rdev; | |
159ec1fc | 710 | |
1da177e4 LT |
711 | return NULL; |
712 | } | |
713 | ||
1ca69c4b N |
714 | static struct md_rdev *find_rdev_rcu(struct mddev *mddev, dev_t dev) |
715 | { | |
716 | struct md_rdev *rdev; | |
717 | ||
718 | rdev_for_each_rcu(rdev, mddev) | |
719 | if (rdev->bdev->bd_dev == dev) | |
720 | return rdev; | |
721 | ||
722 | return NULL; | |
723 | } | |
724 | ||
84fc4b56 | 725 | static struct md_personality *find_pers(int level, char *clevel) |
2604b703 | 726 | { |
84fc4b56 | 727 | struct md_personality *pers; |
d9d166c2 N |
728 | list_for_each_entry(pers, &pers_list, list) { |
729 | if (level != LEVEL_NONE && pers->level == level) | |
2604b703 | 730 | return pers; |
d9d166c2 N |
731 | if (strcmp(pers->name, clevel)==0) |
732 | return pers; | |
733 | } | |
2604b703 N |
734 | return NULL; |
735 | } | |
736 | ||
b73df2d3 | 737 | /* return the offset of the super block in 512byte sectors */ |
3cb03002 | 738 | static inline sector_t calc_dev_sboffset(struct md_rdev *rdev) |
1da177e4 | 739 | { |
57b2caa3 | 740 | sector_t num_sectors = i_size_read(rdev->bdev->bd_inode) / 512; |
b73df2d3 | 741 | return MD_NEW_SIZE_SECTORS(num_sectors); |
1da177e4 LT |
742 | } |
743 | ||
f72ffdd6 | 744 | static int alloc_disk_sb(struct md_rdev *rdev) |
1da177e4 | 745 | { |
1da177e4 | 746 | rdev->sb_page = alloc_page(GFP_KERNEL); |
7f0f0d87 | 747 | if (!rdev->sb_page) |
ebc24337 | 748 | return -ENOMEM; |
1da177e4 LT |
749 | return 0; |
750 | } | |
751 | ||
545c8795 | 752 | void md_rdev_clear(struct md_rdev *rdev) |
1da177e4 LT |
753 | { |
754 | if (rdev->sb_page) { | |
2d1f3b5d | 755 | put_page(rdev->sb_page); |
1da177e4 LT |
756 | rdev->sb_loaded = 0; |
757 | rdev->sb_page = NULL; | |
0f420358 | 758 | rdev->sb_start = 0; |
dd8ac336 | 759 | rdev->sectors = 0; |
1da177e4 | 760 | } |
2699b672 N |
761 | if (rdev->bb_page) { |
762 | put_page(rdev->bb_page); | |
763 | rdev->bb_page = NULL; | |
764 | } | |
d3b407fb | 765 | badblocks_exit(&rdev->badblocks); |
1da177e4 | 766 | } |
545c8795 | 767 | EXPORT_SYMBOL_GPL(md_rdev_clear); |
1da177e4 | 768 | |
4246a0b6 | 769 | static void super_written(struct bio *bio) |
7bfa19f2 | 770 | { |
3cb03002 | 771 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 772 | struct mddev *mddev = rdev->mddev; |
7bfa19f2 | 773 | |
4e4cbee9 CH |
774 | if (bio->bi_status) { |
775 | pr_err("md: super_written gets error=%d\n", bio->bi_status); | |
a9701a30 | 776 | md_error(mddev, rdev); |
46533ff7 N |
777 | if (!test_bit(Faulty, &rdev->flags) |
778 | && (bio->bi_opf & MD_FAILFAST)) { | |
2953079c | 779 | set_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags); |
46533ff7 N |
780 | set_bit(LastDev, &rdev->flags); |
781 | } | |
782 | } else | |
783 | clear_bit(LastDev, &rdev->flags); | |
7bfa19f2 | 784 | |
a9701a30 N |
785 | if (atomic_dec_and_test(&mddev->pending_writes)) |
786 | wake_up(&mddev->sb_wait); | |
ed3b98c7 | 787 | rdev_dec_pending(rdev, mddev); |
f8b58edf | 788 | bio_put(bio); |
7bfa19f2 N |
789 | } |
790 | ||
fd01b88c | 791 | void md_super_write(struct mddev *mddev, struct md_rdev *rdev, |
7bfa19f2 N |
792 | sector_t sector, int size, struct page *page) |
793 | { | |
794 | /* write first size bytes of page to sector of rdev | |
795 | * Increment mddev->pending_writes before returning | |
796 | * and decrement it on completion, waking up sb_wait | |
797 | * if zero is reached. | |
798 | * If an error occurred, call md_error | |
799 | */ | |
46533ff7 N |
800 | struct bio *bio; |
801 | int ff = 0; | |
802 | ||
8961ee79 HM |
803 | if (!page) |
804 | return; | |
805 | ||
46533ff7 N |
806 | if (test_bit(Faulty, &rdev->flags)) |
807 | return; | |
808 | ||
5a85071c | 809 | bio = md_bio_alloc_sync(mddev); |
7bfa19f2 | 810 | |
ed3b98c7 SL |
811 | atomic_inc(&rdev->nr_pending); |
812 | ||
74d46992 | 813 | bio_set_dev(bio, rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev); |
4f024f37 | 814 | bio->bi_iter.bi_sector = sector; |
7bfa19f2 N |
815 | bio_add_page(bio, page, size, 0); |
816 | bio->bi_private = rdev; | |
817 | bio->bi_end_io = super_written; | |
46533ff7 N |
818 | |
819 | if (test_bit(MD_FAILFAST_SUPPORTED, &mddev->flags) && | |
820 | test_bit(FailFast, &rdev->flags) && | |
821 | !test_bit(LastDev, &rdev->flags)) | |
822 | ff = MD_FAILFAST; | |
5a8948f8 | 823 | bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH | REQ_FUA | ff; |
a9701a30 | 824 | |
7bfa19f2 | 825 | atomic_inc(&mddev->pending_writes); |
4e49ea4a | 826 | submit_bio(bio); |
a9701a30 N |
827 | } |
828 | ||
46533ff7 | 829 | int md_super_wait(struct mddev *mddev) |
a9701a30 | 830 | { |
e9c7469b | 831 | /* wait for all superblock writes that were scheduled to complete */ |
1967cd56 | 832 | wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0); |
2953079c | 833 | if (test_and_clear_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags)) |
46533ff7 N |
834 | return -EAGAIN; |
835 | return 0; | |
7bfa19f2 N |
836 | } |
837 | ||
3cb03002 | 838 | int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, |
796a5cf0 | 839 | struct page *page, int op, int op_flags, bool metadata_op) |
1da177e4 | 840 | { |
5a85071c | 841 | struct bio *bio = md_bio_alloc_sync(rdev->mddev); |
1da177e4 LT |
842 | int ret; |
843 | ||
74d46992 CH |
844 | if (metadata_op && rdev->meta_bdev) |
845 | bio_set_dev(bio, rdev->meta_bdev); | |
846 | else | |
847 | bio_set_dev(bio, rdev->bdev); | |
796a5cf0 | 848 | bio_set_op_attrs(bio, op, op_flags); |
ccebd4c4 | 849 | if (metadata_op) |
4f024f37 | 850 | bio->bi_iter.bi_sector = sector + rdev->sb_start; |
1fdd6fc9 N |
851 | else if (rdev->mddev->reshape_position != MaxSector && |
852 | (rdev->mddev->reshape_backwards == | |
853 | (sector >= rdev->mddev->reshape_position))) | |
4f024f37 | 854 | bio->bi_iter.bi_sector = sector + rdev->new_data_offset; |
ccebd4c4 | 855 | else |
4f024f37 | 856 | bio->bi_iter.bi_sector = sector + rdev->data_offset; |
1da177e4 | 857 | bio_add_page(bio, page, size, 0); |
4e49ea4a MC |
858 | |
859 | submit_bio_wait(bio); | |
1da177e4 | 860 | |
4e4cbee9 | 861 | ret = !bio->bi_status; |
1da177e4 LT |
862 | bio_put(bio); |
863 | return ret; | |
864 | } | |
a8745db2 | 865 | EXPORT_SYMBOL_GPL(sync_page_io); |
1da177e4 | 866 | |
f72ffdd6 | 867 | static int read_disk_sb(struct md_rdev *rdev, int size) |
1da177e4 LT |
868 | { |
869 | char b[BDEVNAME_SIZE]; | |
403df478 | 870 | |
1da177e4 LT |
871 | if (rdev->sb_loaded) |
872 | return 0; | |
873 | ||
796a5cf0 | 874 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, REQ_OP_READ, 0, true)) |
1da177e4 LT |
875 | goto fail; |
876 | rdev->sb_loaded = 1; | |
877 | return 0; | |
878 | ||
879 | fail: | |
9d48739e N |
880 | pr_err("md: disabled device %s, could not read superblock.\n", |
881 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
882 | return -EINVAL; |
883 | } | |
884 | ||
e6fd2093 | 885 | static int md_uuid_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 | 886 | { |
f72ffdd6 | 887 | return sb1->set_uuid0 == sb2->set_uuid0 && |
05710466 AN |
888 | sb1->set_uuid1 == sb2->set_uuid1 && |
889 | sb1->set_uuid2 == sb2->set_uuid2 && | |
890 | sb1->set_uuid3 == sb2->set_uuid3; | |
1da177e4 LT |
891 | } |
892 | ||
e6fd2093 | 893 | static int md_sb_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 LT |
894 | { |
895 | int ret; | |
896 | mdp_super_t *tmp1, *tmp2; | |
897 | ||
898 | tmp1 = kmalloc(sizeof(*tmp1),GFP_KERNEL); | |
899 | tmp2 = kmalloc(sizeof(*tmp2),GFP_KERNEL); | |
900 | ||
901 | if (!tmp1 || !tmp2) { | |
902 | ret = 0; | |
1da177e4 LT |
903 | goto abort; |
904 | } | |
905 | ||
906 | *tmp1 = *sb1; | |
907 | *tmp2 = *sb2; | |
908 | ||
909 | /* | |
910 | * nr_disks is not constant | |
911 | */ | |
912 | tmp1->nr_disks = 0; | |
913 | tmp2->nr_disks = 0; | |
914 | ||
ce0c8e05 | 915 | ret = (memcmp(tmp1, tmp2, MD_SB_GENERIC_CONSTANT_WORDS * 4) == 0); |
1da177e4 | 916 | abort: |
990a8baf JJ |
917 | kfree(tmp1); |
918 | kfree(tmp2); | |
1da177e4 LT |
919 | return ret; |
920 | } | |
921 | ||
4d167f09 N |
922 | static u32 md_csum_fold(u32 csum) |
923 | { | |
924 | csum = (csum & 0xffff) + (csum >> 16); | |
925 | return (csum & 0xffff) + (csum >> 16); | |
926 | } | |
927 | ||
f72ffdd6 | 928 | static unsigned int calc_sb_csum(mdp_super_t *sb) |
1da177e4 | 929 | { |
4d167f09 N |
930 | u64 newcsum = 0; |
931 | u32 *sb32 = (u32*)sb; | |
932 | int i; | |
1da177e4 LT |
933 | unsigned int disk_csum, csum; |
934 | ||
935 | disk_csum = sb->sb_csum; | |
936 | sb->sb_csum = 0; | |
4d167f09 N |
937 | |
938 | for (i = 0; i < MD_SB_BYTES/4 ; i++) | |
939 | newcsum += sb32[i]; | |
940 | csum = (newcsum & 0xffffffff) + (newcsum>>32); | |
941 | ||
4d167f09 N |
942 | #ifdef CONFIG_ALPHA |
943 | /* This used to use csum_partial, which was wrong for several | |
944 | * reasons including that different results are returned on | |
945 | * different architectures. It isn't critical that we get exactly | |
946 | * the same return value as before (we always csum_fold before | |
947 | * testing, and that removes any differences). However as we | |
948 | * know that csum_partial always returned a 16bit value on | |
949 | * alphas, do a fold to maximise conformity to previous behaviour. | |
950 | */ | |
951 | sb->sb_csum = md_csum_fold(disk_csum); | |
952 | #else | |
1da177e4 | 953 | sb->sb_csum = disk_csum; |
4d167f09 | 954 | #endif |
1da177e4 LT |
955 | return csum; |
956 | } | |
957 | ||
1da177e4 LT |
958 | /* |
959 | * Handle superblock details. | |
960 | * We want to be able to handle multiple superblock formats | |
961 | * so we have a common interface to them all, and an array of | |
962 | * different handlers. | |
963 | * We rely on user-space to write the initial superblock, and support | |
964 | * reading and updating of superblocks. | |
965 | * Interface methods are: | |
3cb03002 | 966 | * int load_super(struct md_rdev *dev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
967 | * loads and validates a superblock on dev. |
968 | * if refdev != NULL, compare superblocks on both devices | |
969 | * Return: | |
970 | * 0 - dev has a superblock that is compatible with refdev | |
971 | * 1 - dev has a superblock that is compatible and newer than refdev | |
972 | * so dev should be used as the refdev in future | |
973 | * -EINVAL superblock incompatible or invalid | |
974 | * -othererror e.g. -EIO | |
975 | * | |
fd01b88c | 976 | * int validate_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
977 | * Verify that dev is acceptable into mddev. |
978 | * The first time, mddev->raid_disks will be 0, and data from | |
979 | * dev should be merged in. Subsequent calls check that dev | |
980 | * is new enough. Return 0 or -EINVAL | |
981 | * | |
fd01b88c | 982 | * void sync_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
983 | * Update the superblock for rdev with data in mddev |
984 | * This does not write to disc. | |
985 | * | |
986 | */ | |
987 | ||
988 | struct super_type { | |
0cd17fec CW |
989 | char *name; |
990 | struct module *owner; | |
c6563a8c N |
991 | int (*load_super)(struct md_rdev *rdev, |
992 | struct md_rdev *refdev, | |
0cd17fec | 993 | int minor_version); |
c6563a8c N |
994 | int (*validate_super)(struct mddev *mddev, |
995 | struct md_rdev *rdev); | |
996 | void (*sync_super)(struct mddev *mddev, | |
997 | struct md_rdev *rdev); | |
3cb03002 | 998 | unsigned long long (*rdev_size_change)(struct md_rdev *rdev, |
15f4a5fd | 999 | sector_t num_sectors); |
c6563a8c N |
1000 | int (*allow_new_offset)(struct md_rdev *rdev, |
1001 | unsigned long long new_offset); | |
1da177e4 LT |
1002 | }; |
1003 | ||
0894cc30 AN |
1004 | /* |
1005 | * Check that the given mddev has no bitmap. | |
1006 | * | |
1007 | * This function is called from the run method of all personalities that do not | |
1008 | * support bitmaps. It prints an error message and returns non-zero if mddev | |
1009 | * has a bitmap. Otherwise, it returns 0. | |
1010 | * | |
1011 | */ | |
fd01b88c | 1012 | int md_check_no_bitmap(struct mddev *mddev) |
0894cc30 | 1013 | { |
c3d9714e | 1014 | if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset) |
0894cc30 | 1015 | return 0; |
9d48739e | 1016 | pr_warn("%s: bitmaps are not supported for %s\n", |
0894cc30 AN |
1017 | mdname(mddev), mddev->pers->name); |
1018 | return 1; | |
1019 | } | |
1020 | EXPORT_SYMBOL(md_check_no_bitmap); | |
1021 | ||
1da177e4 | 1022 | /* |
f72ffdd6 | 1023 | * load_super for 0.90.0 |
1da177e4 | 1024 | */ |
3cb03002 | 1025 | static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1026 | { |
1027 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
1028 | mdp_super_t *sb; | |
1029 | int ret; | |
1da177e4 LT |
1030 | |
1031 | /* | |
0f420358 | 1032 | * Calculate the position of the superblock (512byte sectors), |
1da177e4 LT |
1033 | * it's at the end of the disk. |
1034 | * | |
1035 | * It also happens to be a multiple of 4Kb. | |
1036 | */ | |
57b2caa3 | 1037 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 1038 | |
0002b271 | 1039 | ret = read_disk_sb(rdev, MD_SB_BYTES); |
9d48739e N |
1040 | if (ret) |
1041 | return ret; | |
1da177e4 LT |
1042 | |
1043 | ret = -EINVAL; | |
1044 | ||
1045 | bdevname(rdev->bdev, b); | |
65a06f06 | 1046 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1047 | |
1048 | if (sb->md_magic != MD_SB_MAGIC) { | |
9d48739e | 1049 | pr_warn("md: invalid raid superblock magic on %s\n", b); |
1da177e4 LT |
1050 | goto abort; |
1051 | } | |
1052 | ||
1053 | if (sb->major_version != 0 || | |
f6705578 N |
1054 | sb->minor_version < 90 || |
1055 | sb->minor_version > 91) { | |
9d48739e N |
1056 | pr_warn("Bad version number %d.%d on %s\n", |
1057 | sb->major_version, sb->minor_version, b); | |
1da177e4 LT |
1058 | goto abort; |
1059 | } | |
1060 | ||
1061 | if (sb->raid_disks <= 0) | |
1062 | goto abort; | |
1063 | ||
4d167f09 | 1064 | if (md_csum_fold(calc_sb_csum(sb)) != md_csum_fold(sb->sb_csum)) { |
9d48739e | 1065 | pr_warn("md: invalid superblock checksum on %s\n", b); |
1da177e4 LT |
1066 | goto abort; |
1067 | } | |
1068 | ||
1069 | rdev->preferred_minor = sb->md_minor; | |
1070 | rdev->data_offset = 0; | |
c6563a8c | 1071 | rdev->new_data_offset = 0; |
0002b271 | 1072 | rdev->sb_size = MD_SB_BYTES; |
9f2f3830 | 1073 | rdev->badblocks.shift = -1; |
1da177e4 LT |
1074 | |
1075 | if (sb->level == LEVEL_MULTIPATH) | |
1076 | rdev->desc_nr = -1; | |
1077 | else | |
1078 | rdev->desc_nr = sb->this_disk.number; | |
1079 | ||
9a7b2b0f | 1080 | if (!refdev) { |
1da177e4 | 1081 | ret = 1; |
9a7b2b0f | 1082 | } else { |
1da177e4 | 1083 | __u64 ev1, ev2; |
65a06f06 | 1084 | mdp_super_t *refsb = page_address(refdev->sb_page); |
e6fd2093 | 1085 | if (!md_uuid_equal(refsb, sb)) { |
9d48739e | 1086 | pr_warn("md: %s has different UUID to %s\n", |
1da177e4 LT |
1087 | b, bdevname(refdev->bdev,b2)); |
1088 | goto abort; | |
1089 | } | |
e6fd2093 | 1090 | if (!md_sb_equal(refsb, sb)) { |
9d48739e N |
1091 | pr_warn("md: %s has same UUID but different superblock to %s\n", |
1092 | b, bdevname(refdev->bdev, b2)); | |
1da177e4 LT |
1093 | goto abort; |
1094 | } | |
1095 | ev1 = md_event(sb); | |
1096 | ev2 = md_event(refsb); | |
1097 | if (ev1 > ev2) | |
1098 | ret = 1; | |
f72ffdd6 | 1099 | else |
1da177e4 LT |
1100 | ret = 0; |
1101 | } | |
8190e754 | 1102 | rdev->sectors = rdev->sb_start; |
667a5313 N |
1103 | /* Limit to 4TB as metadata cannot record more than that. |
1104 | * (not needed for Linear and RAID0 as metadata doesn't | |
1105 | * record this size) | |
1106 | */ | |
3312c951 AB |
1107 | if (IS_ENABLED(CONFIG_LBDAF) && (u64)rdev->sectors >= (2ULL << 32) && |
1108 | sb->level >= 1) | |
1109 | rdev->sectors = (sector_t)(2ULL << 32) - 2; | |
1da177e4 | 1110 | |
27a7b260 | 1111 | if (rdev->sectors < ((sector_t)sb->size) * 2 && sb->level >= 1) |
2bf071bf N |
1112 | /* "this cannot possibly happen" ... */ |
1113 | ret = -EINVAL; | |
1114 | ||
1da177e4 LT |
1115 | abort: |
1116 | return ret; | |
1117 | } | |
1118 | ||
1119 | /* | |
1120 | * validate_super for 0.90.0 | |
1121 | */ | |
fd01b88c | 1122 | static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1123 | { |
1124 | mdp_disk_t *desc; | |
65a06f06 | 1125 | mdp_super_t *sb = page_address(rdev->sb_page); |
07d84d10 | 1126 | __u64 ev1 = md_event(sb); |
1da177e4 | 1127 | |
41158c7e | 1128 | rdev->raid_disk = -1; |
c5d79adb N |
1129 | clear_bit(Faulty, &rdev->flags); |
1130 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1131 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1132 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1133 | |
1da177e4 LT |
1134 | if (mddev->raid_disks == 0) { |
1135 | mddev->major_version = 0; | |
1136 | mddev->minor_version = sb->minor_version; | |
1137 | mddev->patch_version = sb->patch_version; | |
e691063a | 1138 | mddev->external = 0; |
9d8f0363 | 1139 | mddev->chunk_sectors = sb->chunk_size >> 9; |
1da177e4 LT |
1140 | mddev->ctime = sb->ctime; |
1141 | mddev->utime = sb->utime; | |
1142 | mddev->level = sb->level; | |
d9d166c2 | 1143 | mddev->clevel[0] = 0; |
1da177e4 LT |
1144 | mddev->layout = sb->layout; |
1145 | mddev->raid_disks = sb->raid_disks; | |
27a7b260 | 1146 | mddev->dev_sectors = ((sector_t)sb->size) * 2; |
07d84d10 | 1147 | mddev->events = ev1; |
c3d9714e | 1148 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1149 | mddev->bitmap_info.space = 0; |
1150 | /* bitmap can use 60 K after the 4K superblocks */ | |
c3d9714e | 1151 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 1152 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
2c810cdd | 1153 | mddev->reshape_backwards = 0; |
1da177e4 | 1154 | |
f6705578 N |
1155 | if (mddev->minor_version >= 91) { |
1156 | mddev->reshape_position = sb->reshape_position; | |
1157 | mddev->delta_disks = sb->delta_disks; | |
1158 | mddev->new_level = sb->new_level; | |
1159 | mddev->new_layout = sb->new_layout; | |
664e7c41 | 1160 | mddev->new_chunk_sectors = sb->new_chunk >> 9; |
2c810cdd N |
1161 | if (mddev->delta_disks < 0) |
1162 | mddev->reshape_backwards = 1; | |
f6705578 N |
1163 | } else { |
1164 | mddev->reshape_position = MaxSector; | |
1165 | mddev->delta_disks = 0; | |
1166 | mddev->new_level = mddev->level; | |
1167 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1168 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1169 | } |
1170 | ||
1da177e4 LT |
1171 | if (sb->state & (1<<MD_SB_CLEAN)) |
1172 | mddev->recovery_cp = MaxSector; | |
1173 | else { | |
f72ffdd6 | 1174 | if (sb->events_hi == sb->cp_events_hi && |
1da177e4 LT |
1175 | sb->events_lo == sb->cp_events_lo) { |
1176 | mddev->recovery_cp = sb->recovery_cp; | |
1177 | } else | |
1178 | mddev->recovery_cp = 0; | |
1179 | } | |
1180 | ||
1181 | memcpy(mddev->uuid+0, &sb->set_uuid0, 4); | |
1182 | memcpy(mddev->uuid+4, &sb->set_uuid1, 4); | |
1183 | memcpy(mddev->uuid+8, &sb->set_uuid2, 4); | |
1184 | memcpy(mddev->uuid+12,&sb->set_uuid3, 4); | |
1185 | ||
1186 | mddev->max_disks = MD_SB_DISKS; | |
a654b9d8 N |
1187 | |
1188 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT) && | |
6409bb05 | 1189 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1190 | mddev->bitmap_info.offset = |
1191 | mddev->bitmap_info.default_offset; | |
6409bb05 | 1192 | mddev->bitmap_info.space = |
c9ad020f | 1193 | mddev->bitmap_info.default_space; |
6409bb05 | 1194 | } |
a654b9d8 | 1195 | |
41158c7e | 1196 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1197 | /* Insist on good event counter while assembling, except |
1198 | * for spares (which don't need an event count) */ | |
1da177e4 | 1199 | ++ev1; |
be6800a7 N |
1200 | if (sb->disks[rdev->desc_nr].state & ( |
1201 | (1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE))) | |
f72ffdd6 | 1202 | if (ev1 < mddev->events) |
be6800a7 | 1203 | return -EINVAL; |
41158c7e N |
1204 | } else if (mddev->bitmap) { |
1205 | /* if adding to array with a bitmap, then we can accept an | |
1206 | * older device ... but not too old. | |
1207 | */ | |
41158c7e N |
1208 | if (ev1 < mddev->bitmap->events_cleared) |
1209 | return 0; | |
8313b8e5 N |
1210 | if (ev1 < mddev->events) |
1211 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1212 | } else { |
1213 | if (ev1 < mddev->events) | |
1214 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1215 | return 0; | |
1216 | } | |
41158c7e | 1217 | |
1da177e4 | 1218 | if (mddev->level != LEVEL_MULTIPATH) { |
1da177e4 LT |
1219 | desc = sb->disks + rdev->desc_nr; |
1220 | ||
1221 | if (desc->state & (1<<MD_DISK_FAULTY)) | |
b2d444d7 | 1222 | set_bit(Faulty, &rdev->flags); |
7c7546cc N |
1223 | else if (desc->state & (1<<MD_DISK_SYNC) /* && |
1224 | desc->raid_disk < mddev->raid_disks */) { | |
b2d444d7 | 1225 | set_bit(In_sync, &rdev->flags); |
1da177e4 | 1226 | rdev->raid_disk = desc->raid_disk; |
f466722c | 1227 | rdev->saved_raid_disk = desc->raid_disk; |
0261cd9f N |
1228 | } else if (desc->state & (1<<MD_DISK_ACTIVE)) { |
1229 | /* active but not in sync implies recovery up to | |
1230 | * reshape position. We don't know exactly where | |
1231 | * that is, so set to zero for now */ | |
1232 | if (mddev->minor_version >= 91) { | |
1233 | rdev->recovery_offset = 0; | |
1234 | rdev->raid_disk = desc->raid_disk; | |
1235 | } | |
1da177e4 | 1236 | } |
8ddf9efe N |
1237 | if (desc->state & (1<<MD_DISK_WRITEMOSTLY)) |
1238 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1239 | if (desc->state & (1<<MD_DISK_FAILFAST)) |
1240 | set_bit(FailFast, &rdev->flags); | |
41158c7e | 1241 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1242 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1243 | return 0; |
1244 | } | |
1245 | ||
1246 | /* | |
1247 | * sync_super for 0.90.0 | |
1248 | */ | |
fd01b88c | 1249 | static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1250 | { |
1251 | mdp_super_t *sb; | |
3cb03002 | 1252 | struct md_rdev *rdev2; |
1da177e4 | 1253 | int next_spare = mddev->raid_disks; |
19133a42 | 1254 | |
1da177e4 LT |
1255 | /* make rdev->sb match mddev data.. |
1256 | * | |
1257 | * 1/ zero out disks | |
1258 | * 2/ Add info for each disk, keeping track of highest desc_nr (next_spare); | |
1259 | * 3/ any empty disks < next_spare become removed | |
1260 | * | |
1261 | * disks[0] gets initialised to REMOVED because | |
1262 | * we cannot be sure from other fields if it has | |
1263 | * been initialised or not. | |
1264 | */ | |
1265 | int i; | |
1266 | int active=0, working=0,failed=0,spare=0,nr_disks=0; | |
1267 | ||
61181565 N |
1268 | rdev->sb_size = MD_SB_BYTES; |
1269 | ||
65a06f06 | 1270 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1271 | |
1272 | memset(sb, 0, sizeof(*sb)); | |
1273 | ||
1274 | sb->md_magic = MD_SB_MAGIC; | |
1275 | sb->major_version = mddev->major_version; | |
1da177e4 LT |
1276 | sb->patch_version = mddev->patch_version; |
1277 | sb->gvalid_words = 0; /* ignored */ | |
1278 | memcpy(&sb->set_uuid0, mddev->uuid+0, 4); | |
1279 | memcpy(&sb->set_uuid1, mddev->uuid+4, 4); | |
1280 | memcpy(&sb->set_uuid2, mddev->uuid+8, 4); | |
1281 | memcpy(&sb->set_uuid3, mddev->uuid+12,4); | |
1282 | ||
9ebc6ef1 | 1283 | sb->ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 1284 | sb->level = mddev->level; |
58c0fed4 | 1285 | sb->size = mddev->dev_sectors / 2; |
1da177e4 LT |
1286 | sb->raid_disks = mddev->raid_disks; |
1287 | sb->md_minor = mddev->md_minor; | |
e691063a | 1288 | sb->not_persistent = 0; |
9ebc6ef1 | 1289 | sb->utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
1290 | sb->state = 0; |
1291 | sb->events_hi = (mddev->events>>32); | |
1292 | sb->events_lo = (u32)mddev->events; | |
1293 | ||
f6705578 N |
1294 | if (mddev->reshape_position == MaxSector) |
1295 | sb->minor_version = 90; | |
1296 | else { | |
1297 | sb->minor_version = 91; | |
1298 | sb->reshape_position = mddev->reshape_position; | |
1299 | sb->new_level = mddev->new_level; | |
1300 | sb->delta_disks = mddev->delta_disks; | |
1301 | sb->new_layout = mddev->new_layout; | |
664e7c41 | 1302 | sb->new_chunk = mddev->new_chunk_sectors << 9; |
f6705578 N |
1303 | } |
1304 | mddev->minor_version = sb->minor_version; | |
1da177e4 LT |
1305 | if (mddev->in_sync) |
1306 | { | |
1307 | sb->recovery_cp = mddev->recovery_cp; | |
1308 | sb->cp_events_hi = (mddev->events>>32); | |
1309 | sb->cp_events_lo = (u32)mddev->events; | |
1310 | if (mddev->recovery_cp == MaxSector) | |
1311 | sb->state = (1<< MD_SB_CLEAN); | |
1312 | } else | |
1313 | sb->recovery_cp = 0; | |
1314 | ||
1315 | sb->layout = mddev->layout; | |
9d8f0363 | 1316 | sb->chunk_size = mddev->chunk_sectors << 9; |
1da177e4 | 1317 | |
c3d9714e | 1318 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) |
a654b9d8 N |
1319 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); |
1320 | ||
1da177e4 | 1321 | sb->disks[0].state = (1<<MD_DISK_REMOVED); |
dafb20fa | 1322 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1323 | mdp_disk_t *d; |
86e6ffdd | 1324 | int desc_nr; |
0261cd9f N |
1325 | int is_active = test_bit(In_sync, &rdev2->flags); |
1326 | ||
1327 | if (rdev2->raid_disk >= 0 && | |
1328 | sb->minor_version >= 91) | |
1329 | /* we have nowhere to store the recovery_offset, | |
1330 | * but if it is not below the reshape_position, | |
1331 | * we can piggy-back on that. | |
1332 | */ | |
1333 | is_active = 1; | |
1334 | if (rdev2->raid_disk < 0 || | |
1335 | test_bit(Faulty, &rdev2->flags)) | |
1336 | is_active = 0; | |
1337 | if (is_active) | |
86e6ffdd | 1338 | desc_nr = rdev2->raid_disk; |
1da177e4 | 1339 | else |
86e6ffdd | 1340 | desc_nr = next_spare++; |
19133a42 | 1341 | rdev2->desc_nr = desc_nr; |
1da177e4 LT |
1342 | d = &sb->disks[rdev2->desc_nr]; |
1343 | nr_disks++; | |
1344 | d->number = rdev2->desc_nr; | |
1345 | d->major = MAJOR(rdev2->bdev->bd_dev); | |
1346 | d->minor = MINOR(rdev2->bdev->bd_dev); | |
0261cd9f | 1347 | if (is_active) |
1da177e4 LT |
1348 | d->raid_disk = rdev2->raid_disk; |
1349 | else | |
1350 | d->raid_disk = rdev2->desc_nr; /* compatibility */ | |
1be7892f | 1351 | if (test_bit(Faulty, &rdev2->flags)) |
1da177e4 | 1352 | d->state = (1<<MD_DISK_FAULTY); |
0261cd9f | 1353 | else if (is_active) { |
1da177e4 | 1354 | d->state = (1<<MD_DISK_ACTIVE); |
0261cd9f N |
1355 | if (test_bit(In_sync, &rdev2->flags)) |
1356 | d->state |= (1<<MD_DISK_SYNC); | |
1da177e4 LT |
1357 | active++; |
1358 | working++; | |
1359 | } else { | |
1360 | d->state = 0; | |
1361 | spare++; | |
1362 | working++; | |
1363 | } | |
8ddf9efe N |
1364 | if (test_bit(WriteMostly, &rdev2->flags)) |
1365 | d->state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
1366 | if (test_bit(FailFast, &rdev2->flags)) |
1367 | d->state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 | 1368 | } |
1da177e4 LT |
1369 | /* now set the "removed" and "faulty" bits on any missing devices */ |
1370 | for (i=0 ; i < mddev->raid_disks ; i++) { | |
1371 | mdp_disk_t *d = &sb->disks[i]; | |
1372 | if (d->state == 0 && d->number == 0) { | |
1373 | d->number = i; | |
1374 | d->raid_disk = i; | |
1375 | d->state = (1<<MD_DISK_REMOVED); | |
1376 | d->state |= (1<<MD_DISK_FAULTY); | |
1377 | failed++; | |
1378 | } | |
1379 | } | |
1380 | sb->nr_disks = nr_disks; | |
1381 | sb->active_disks = active; | |
1382 | sb->working_disks = working; | |
1383 | sb->failed_disks = failed; | |
1384 | sb->spare_disks = spare; | |
1385 | ||
1386 | sb->this_disk = sb->disks[rdev->desc_nr]; | |
1387 | sb->sb_csum = calc_sb_csum(sb); | |
1388 | } | |
1389 | ||
0cd17fec CW |
1390 | /* |
1391 | * rdev_size_change for 0.90.0 | |
1392 | */ | |
1393 | static unsigned long long | |
3cb03002 | 1394 | super_90_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec | 1395 | { |
58c0fed4 | 1396 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1397 | return 0; /* component must fit device */ |
c3d9714e | 1398 | if (rdev->mddev->bitmap_info.offset) |
0cd17fec | 1399 | return 0; /* can't move bitmap */ |
57b2caa3 | 1400 | rdev->sb_start = calc_dev_sboffset(rdev); |
15f4a5fd AN |
1401 | if (!num_sectors || num_sectors > rdev->sb_start) |
1402 | num_sectors = rdev->sb_start; | |
27a7b260 N |
1403 | /* Limit to 4TB as metadata cannot record more than that. |
1404 | * 4TB == 2^32 KB, or 2*2^32 sectors. | |
1405 | */ | |
3312c951 AB |
1406 | if (IS_ENABLED(CONFIG_LBDAF) && (u64)num_sectors >= (2ULL << 32) && |
1407 | rdev->mddev->level >= 1) | |
1408 | num_sectors = (sector_t)(2ULL << 32) - 2; | |
46533ff7 N |
1409 | do { |
1410 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
0cd17fec | 1411 | rdev->sb_page); |
46533ff7 | 1412 | } while (md_super_wait(rdev->mddev) < 0); |
c26a44ed | 1413 | return num_sectors; |
0cd17fec CW |
1414 | } |
1415 | ||
c6563a8c N |
1416 | static int |
1417 | super_90_allow_new_offset(struct md_rdev *rdev, unsigned long long new_offset) | |
1418 | { | |
1419 | /* non-zero offset changes not possible with v0.90 */ | |
1420 | return new_offset == 0; | |
1421 | } | |
0cd17fec | 1422 | |
1da177e4 LT |
1423 | /* |
1424 | * version 1 superblock | |
1425 | */ | |
1426 | ||
f72ffdd6 | 1427 | static __le32 calc_sb_1_csum(struct mdp_superblock_1 *sb) |
1da177e4 | 1428 | { |
1c05b4bc N |
1429 | __le32 disk_csum; |
1430 | u32 csum; | |
1da177e4 LT |
1431 | unsigned long long newcsum; |
1432 | int size = 256 + le32_to_cpu(sb->max_dev)*2; | |
1c05b4bc | 1433 | __le32 *isuper = (__le32*)sb; |
1da177e4 LT |
1434 | |
1435 | disk_csum = sb->sb_csum; | |
1436 | sb->sb_csum = 0; | |
1437 | newcsum = 0; | |
1f3c9907 | 1438 | for (; size >= 4; size -= 4) |
1da177e4 LT |
1439 | newcsum += le32_to_cpu(*isuper++); |
1440 | ||
1441 | if (size == 2) | |
1c05b4bc | 1442 | newcsum += le16_to_cpu(*(__le16*) isuper); |
1da177e4 LT |
1443 | |
1444 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
1445 | sb->sb_csum = disk_csum; | |
1446 | return cpu_to_le32(csum); | |
1447 | } | |
1448 | ||
3cb03002 | 1449 | static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1450 | { |
1451 | struct mdp_superblock_1 *sb; | |
1452 | int ret; | |
0f420358 | 1453 | sector_t sb_start; |
c6563a8c | 1454 | sector_t sectors; |
1da177e4 | 1455 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; |
0002b271 | 1456 | int bmask; |
1da177e4 LT |
1457 | |
1458 | /* | |
0f420358 | 1459 | * Calculate the position of the superblock in 512byte sectors. |
1da177e4 LT |
1460 | * It is always aligned to a 4K boundary and |
1461 | * depeding on minor_version, it can be: | |
1462 | * 0: At least 8K, but less than 12K, from end of device | |
1463 | * 1: At start of device | |
1464 | * 2: 4K from start of device. | |
1465 | */ | |
1466 | switch(minor_version) { | |
1467 | case 0: | |
77304d2a | 1468 | sb_start = i_size_read(rdev->bdev->bd_inode) >> 9; |
0f420358 AN |
1469 | sb_start -= 8*2; |
1470 | sb_start &= ~(sector_t)(4*2-1); | |
1da177e4 LT |
1471 | break; |
1472 | case 1: | |
0f420358 | 1473 | sb_start = 0; |
1da177e4 LT |
1474 | break; |
1475 | case 2: | |
0f420358 | 1476 | sb_start = 8; |
1da177e4 LT |
1477 | break; |
1478 | default: | |
1479 | return -EINVAL; | |
1480 | } | |
0f420358 | 1481 | rdev->sb_start = sb_start; |
1da177e4 | 1482 | |
0002b271 N |
1483 | /* superblock is rarely larger than 1K, but it can be larger, |
1484 | * and it is safe to read 4k, so we do that | |
1485 | */ | |
1486 | ret = read_disk_sb(rdev, 4096); | |
1da177e4 LT |
1487 | if (ret) return ret; |
1488 | ||
65a06f06 | 1489 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1490 | |
1491 | if (sb->magic != cpu_to_le32(MD_SB_MAGIC) || | |
1492 | sb->major_version != cpu_to_le32(1) || | |
1493 | le32_to_cpu(sb->max_dev) > (4096-256)/2 || | |
0f420358 | 1494 | le64_to_cpu(sb->super_offset) != rdev->sb_start || |
71c0805c | 1495 | (le32_to_cpu(sb->feature_map) & ~MD_FEATURE_ALL) != 0) |
1da177e4 LT |
1496 | return -EINVAL; |
1497 | ||
1498 | if (calc_sb_1_csum(sb) != sb->sb_csum) { | |
9d48739e | 1499 | pr_warn("md: invalid superblock checksum on %s\n", |
1da177e4 LT |
1500 | bdevname(rdev->bdev,b)); |
1501 | return -EINVAL; | |
1502 | } | |
1503 | if (le64_to_cpu(sb->data_size) < 10) { | |
9d48739e N |
1504 | pr_warn("md: data_size too small on %s\n", |
1505 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
1506 | return -EINVAL; |
1507 | } | |
c6563a8c N |
1508 | if (sb->pad0 || |
1509 | sb->pad3[0] || | |
1510 | memcmp(sb->pad3, sb->pad3+1, sizeof(sb->pad3) - sizeof(sb->pad3[1]))) | |
1511 | /* Some padding is non-zero, might be a new feature */ | |
1512 | return -EINVAL; | |
e11e93fa | 1513 | |
1da177e4 LT |
1514 | rdev->preferred_minor = 0xffff; |
1515 | rdev->data_offset = le64_to_cpu(sb->data_offset); | |
c6563a8c N |
1516 | rdev->new_data_offset = rdev->data_offset; |
1517 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE) && | |
1518 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) | |
1519 | rdev->new_data_offset += (s32)le32_to_cpu(sb->new_offset); | |
4dbcdc75 | 1520 | atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read)); |
1da177e4 | 1521 | |
0002b271 | 1522 | rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256; |
e1defc4f | 1523 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; |
0002b271 | 1524 | if (rdev->sb_size & bmask) |
a1801f85 N |
1525 | rdev->sb_size = (rdev->sb_size | bmask) + 1; |
1526 | ||
1527 | if (minor_version | |
0f420358 | 1528 | && rdev->data_offset < sb_start + (rdev->sb_size/512)) |
a1801f85 | 1529 | return -EINVAL; |
c6563a8c N |
1530 | if (minor_version |
1531 | && rdev->new_data_offset < sb_start + (rdev->sb_size/512)) | |
1532 | return -EINVAL; | |
0002b271 | 1533 | |
31b65a0d N |
1534 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH)) |
1535 | rdev->desc_nr = -1; | |
1536 | else | |
1537 | rdev->desc_nr = le32_to_cpu(sb->dev_number); | |
1538 | ||
2699b672 N |
1539 | if (!rdev->bb_page) { |
1540 | rdev->bb_page = alloc_page(GFP_KERNEL); | |
1541 | if (!rdev->bb_page) | |
1542 | return -ENOMEM; | |
1543 | } | |
1544 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BAD_BLOCKS) && | |
1545 | rdev->badblocks.count == 0) { | |
1546 | /* need to load the bad block list. | |
1547 | * Currently we limit it to one page. | |
1548 | */ | |
1549 | s32 offset; | |
1550 | sector_t bb_sector; | |
1551 | u64 *bbp; | |
1552 | int i; | |
1553 | int sectors = le16_to_cpu(sb->bblog_size); | |
1554 | if (sectors > (PAGE_SIZE / 512)) | |
1555 | return -EINVAL; | |
1556 | offset = le32_to_cpu(sb->bblog_offset); | |
1557 | if (offset == 0) | |
1558 | return -EINVAL; | |
1559 | bb_sector = (long long)offset; | |
1560 | if (!sync_page_io(rdev, bb_sector, sectors << 9, | |
796a5cf0 | 1561 | rdev->bb_page, REQ_OP_READ, 0, true)) |
2699b672 N |
1562 | return -EIO; |
1563 | bbp = (u64 *)page_address(rdev->bb_page); | |
1564 | rdev->badblocks.shift = sb->bblog_shift; | |
1565 | for (i = 0 ; i < (sectors << (9-3)) ; i++, bbp++) { | |
1566 | u64 bb = le64_to_cpu(*bbp); | |
1567 | int count = bb & (0x3ff); | |
1568 | u64 sector = bb >> 10; | |
1569 | sector <<= sb->bblog_shift; | |
1570 | count <<= sb->bblog_shift; | |
1571 | if (bb + 1 == 0) | |
1572 | break; | |
fc974ee2 | 1573 | if (badblocks_set(&rdev->badblocks, sector, count, 1)) |
2699b672 N |
1574 | return -EINVAL; |
1575 | } | |
486adf72 N |
1576 | } else if (sb->bblog_offset != 0) |
1577 | rdev->badblocks.shift = 0; | |
2699b672 | 1578 | |
ddc08823 PB |
1579 | if ((le32_to_cpu(sb->feature_map) & |
1580 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS))) { | |
ea0213e0 AP |
1581 | rdev->ppl.offset = (__s16)le16_to_cpu(sb->ppl.offset); |
1582 | rdev->ppl.size = le16_to_cpu(sb->ppl.size); | |
1583 | rdev->ppl.sector = rdev->sb_start + rdev->ppl.offset; | |
1584 | } | |
1585 | ||
9a7b2b0f | 1586 | if (!refdev) { |
8ed75463 | 1587 | ret = 1; |
9a7b2b0f | 1588 | } else { |
1da177e4 | 1589 | __u64 ev1, ev2; |
65a06f06 | 1590 | struct mdp_superblock_1 *refsb = page_address(refdev->sb_page); |
1da177e4 LT |
1591 | |
1592 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16) != 0 || | |
1593 | sb->level != refsb->level || | |
1594 | sb->layout != refsb->layout || | |
1595 | sb->chunksize != refsb->chunksize) { | |
9d48739e | 1596 | pr_warn("md: %s has strangely different superblock to %s\n", |
1da177e4 LT |
1597 | bdevname(rdev->bdev,b), |
1598 | bdevname(refdev->bdev,b2)); | |
1599 | return -EINVAL; | |
1600 | } | |
1601 | ev1 = le64_to_cpu(sb->events); | |
1602 | ev2 = le64_to_cpu(refsb->events); | |
1603 | ||
1604 | if (ev1 > ev2) | |
8ed75463 N |
1605 | ret = 1; |
1606 | else | |
1607 | ret = 0; | |
1da177e4 | 1608 | } |
c6563a8c N |
1609 | if (minor_version) { |
1610 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9); | |
1611 | sectors -= rdev->data_offset; | |
1612 | } else | |
1613 | sectors = rdev->sb_start; | |
1614 | if (sectors < le64_to_cpu(sb->data_size)) | |
1da177e4 | 1615 | return -EINVAL; |
dd8ac336 | 1616 | rdev->sectors = le64_to_cpu(sb->data_size); |
8ed75463 | 1617 | return ret; |
1da177e4 LT |
1618 | } |
1619 | ||
fd01b88c | 1620 | static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 1621 | { |
65a06f06 | 1622 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
07d84d10 | 1623 | __u64 ev1 = le64_to_cpu(sb->events); |
1da177e4 | 1624 | |
41158c7e | 1625 | rdev->raid_disk = -1; |
c5d79adb N |
1626 | clear_bit(Faulty, &rdev->flags); |
1627 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1628 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1629 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1630 | |
1da177e4 LT |
1631 | if (mddev->raid_disks == 0) { |
1632 | mddev->major_version = 1; | |
1633 | mddev->patch_version = 0; | |
e691063a | 1634 | mddev->external = 0; |
9d8f0363 | 1635 | mddev->chunk_sectors = le32_to_cpu(sb->chunksize); |
9ebc6ef1 DD |
1636 | mddev->ctime = le64_to_cpu(sb->ctime); |
1637 | mddev->utime = le64_to_cpu(sb->utime); | |
1da177e4 | 1638 | mddev->level = le32_to_cpu(sb->level); |
d9d166c2 | 1639 | mddev->clevel[0] = 0; |
1da177e4 LT |
1640 | mddev->layout = le32_to_cpu(sb->layout); |
1641 | mddev->raid_disks = le32_to_cpu(sb->raid_disks); | |
58c0fed4 | 1642 | mddev->dev_sectors = le64_to_cpu(sb->size); |
07d84d10 | 1643 | mddev->events = ev1; |
c3d9714e | 1644 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1645 | mddev->bitmap_info.space = 0; |
1646 | /* Default location for bitmap is 1K after superblock | |
1647 | * using 3K - total of 4K | |
1648 | */ | |
c3d9714e | 1649 | mddev->bitmap_info.default_offset = 1024 >> 9; |
6409bb05 | 1650 | mddev->bitmap_info.default_space = (4096-1024) >> 9; |
2c810cdd N |
1651 | mddev->reshape_backwards = 0; |
1652 | ||
1da177e4 LT |
1653 | mddev->recovery_cp = le64_to_cpu(sb->resync_offset); |
1654 | memcpy(mddev->uuid, sb->set_uuid, 16); | |
1655 | ||
1656 | mddev->max_disks = (4096-256)/2; | |
a654b9d8 | 1657 | |
71c0805c | 1658 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) && |
6409bb05 | 1659 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1660 | mddev->bitmap_info.offset = |
1661 | (__s32)le32_to_cpu(sb->bitmap_offset); | |
6409bb05 N |
1662 | /* Metadata doesn't record how much space is available. |
1663 | * For 1.0, we assume we can use up to the superblock | |
1664 | * if before, else to 4K beyond superblock. | |
1665 | * For others, assume no change is possible. | |
1666 | */ | |
1667 | if (mddev->minor_version > 0) | |
1668 | mddev->bitmap_info.space = 0; | |
1669 | else if (mddev->bitmap_info.offset > 0) | |
1670 | mddev->bitmap_info.space = | |
1671 | 8 - mddev->bitmap_info.offset; | |
1672 | else | |
1673 | mddev->bitmap_info.space = | |
1674 | -mddev->bitmap_info.offset; | |
1675 | } | |
e11e93fa | 1676 | |
f6705578 N |
1677 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { |
1678 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); | |
1679 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); | |
1680 | mddev->new_level = le32_to_cpu(sb->new_level); | |
1681 | mddev->new_layout = le32_to_cpu(sb->new_layout); | |
664e7c41 | 1682 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_chunk); |
2c810cdd N |
1683 | if (mddev->delta_disks < 0 || |
1684 | (mddev->delta_disks == 0 && | |
1685 | (le32_to_cpu(sb->feature_map) | |
1686 | & MD_FEATURE_RESHAPE_BACKWARDS))) | |
1687 | mddev->reshape_backwards = 1; | |
f6705578 N |
1688 | } else { |
1689 | mddev->reshape_position = MaxSector; | |
1690 | mddev->delta_disks = 0; | |
1691 | mddev->new_level = mddev->level; | |
1692 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1693 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1694 | } |
1695 | ||
486b0f7b | 1696 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL) |
a62ab49e | 1697 | set_bit(MD_HAS_JOURNAL, &mddev->flags); |
ea0213e0 | 1698 | |
ddc08823 PB |
1699 | if (le32_to_cpu(sb->feature_map) & |
1700 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS)) { | |
ea0213e0 AP |
1701 | if (le32_to_cpu(sb->feature_map) & |
1702 | (MD_FEATURE_BITMAP_OFFSET | MD_FEATURE_JOURNAL)) | |
1703 | return -EINVAL; | |
ddc08823 PB |
1704 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_PPL) && |
1705 | (le32_to_cpu(sb->feature_map) & | |
1706 | MD_FEATURE_MULTIPLE_PPLS)) | |
1707 | return -EINVAL; | |
ea0213e0 AP |
1708 | set_bit(MD_HAS_PPL, &mddev->flags); |
1709 | } | |
41158c7e | 1710 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1711 | /* Insist of good event counter while assembling, except for |
1712 | * spares (which don't need an event count) */ | |
1da177e4 | 1713 | ++ev1; |
be6800a7 N |
1714 | if (rdev->desc_nr >= 0 && |
1715 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
a3dfbdaa SL |
1716 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || |
1717 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL)) | |
be6800a7 N |
1718 | if (ev1 < mddev->events) |
1719 | return -EINVAL; | |
41158c7e N |
1720 | } else if (mddev->bitmap) { |
1721 | /* If adding to array with a bitmap, then we can accept an | |
1722 | * older device, but not too old. | |
1723 | */ | |
41158c7e N |
1724 | if (ev1 < mddev->bitmap->events_cleared) |
1725 | return 0; | |
8313b8e5 N |
1726 | if (ev1 < mddev->events) |
1727 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1728 | } else { |
1729 | if (ev1 < mddev->events) | |
1730 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1731 | return 0; | |
1732 | } | |
1da177e4 LT |
1733 | if (mddev->level != LEVEL_MULTIPATH) { |
1734 | int role; | |
3673f305 N |
1735 | if (rdev->desc_nr < 0 || |
1736 | rdev->desc_nr >= le32_to_cpu(sb->max_dev)) { | |
c4d4c91b | 1737 | role = MD_DISK_ROLE_SPARE; |
3673f305 N |
1738 | rdev->desc_nr = -1; |
1739 | } else | |
1740 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
1da177e4 | 1741 | switch(role) { |
c4d4c91b | 1742 | case MD_DISK_ROLE_SPARE: /* spare */ |
1da177e4 | 1743 | break; |
c4d4c91b | 1744 | case MD_DISK_ROLE_FAULTY: /* faulty */ |
b2d444d7 | 1745 | set_bit(Faulty, &rdev->flags); |
1da177e4 | 1746 | break; |
bac624f3 SL |
1747 | case MD_DISK_ROLE_JOURNAL: /* journal device */ |
1748 | if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL)) { | |
1749 | /* journal device without journal feature */ | |
9d48739e | 1750 | pr_warn("md: journal device provided without journal feature, ignoring the device\n"); |
bac624f3 SL |
1751 | return -EINVAL; |
1752 | } | |
1753 | set_bit(Journal, &rdev->flags); | |
3069aa8d | 1754 | rdev->journal_tail = le64_to_cpu(sb->journal_tail); |
9b15603d | 1755 | rdev->raid_disk = 0; |
bac624f3 | 1756 | break; |
1da177e4 | 1757 | default: |
f466722c | 1758 | rdev->saved_raid_disk = role; |
5fd6c1dc | 1759 | if ((le32_to_cpu(sb->feature_map) & |
f466722c | 1760 | MD_FEATURE_RECOVERY_OFFSET)) { |
5fd6c1dc | 1761 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); |
f466722c N |
1762 | if (!(le32_to_cpu(sb->feature_map) & |
1763 | MD_FEATURE_RECOVERY_BITMAP)) | |
1764 | rdev->saved_raid_disk = -1; | |
1765 | } else | |
5fd6c1dc | 1766 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1767 | rdev->raid_disk = role; |
1768 | break; | |
1769 | } | |
8ddf9efe N |
1770 | if (sb->devflags & WriteMostly1) |
1771 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1772 | if (sb->devflags & FailFast1) |
1773 | set_bit(FailFast, &rdev->flags); | |
2d78f8c4 N |
1774 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) |
1775 | set_bit(Replacement, &rdev->flags); | |
41158c7e | 1776 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1777 | set_bit(In_sync, &rdev->flags); |
41158c7e | 1778 | |
1da177e4 LT |
1779 | return 0; |
1780 | } | |
1781 | ||
fd01b88c | 1782 | static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1783 | { |
1784 | struct mdp_superblock_1 *sb; | |
3cb03002 | 1785 | struct md_rdev *rdev2; |
1da177e4 LT |
1786 | int max_dev, i; |
1787 | /* make rdev->sb match mddev and rdev data. */ | |
1788 | ||
65a06f06 | 1789 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1790 | |
1791 | sb->feature_map = 0; | |
1792 | sb->pad0 = 0; | |
5fd6c1dc | 1793 | sb->recovery_offset = cpu_to_le64(0); |
1da177e4 LT |
1794 | memset(sb->pad3, 0, sizeof(sb->pad3)); |
1795 | ||
1796 | sb->utime = cpu_to_le64((__u64)mddev->utime); | |
1797 | sb->events = cpu_to_le64(mddev->events); | |
1798 | if (mddev->in_sync) | |
1799 | sb->resync_offset = cpu_to_le64(mddev->recovery_cp); | |
bd18f646 SL |
1800 | else if (test_bit(MD_JOURNAL_CLEAN, &mddev->flags)) |
1801 | sb->resync_offset = cpu_to_le64(MaxSector); | |
1da177e4 LT |
1802 | else |
1803 | sb->resync_offset = cpu_to_le64(0); | |
1804 | ||
1c05b4bc | 1805 | sb->cnt_corrected_read = cpu_to_le32(atomic_read(&rdev->corrected_errors)); |
4dbcdc75 | 1806 | |
f0ca340c | 1807 | sb->raid_disks = cpu_to_le32(mddev->raid_disks); |
58c0fed4 | 1808 | sb->size = cpu_to_le64(mddev->dev_sectors); |
9d8f0363 | 1809 | sb->chunksize = cpu_to_le32(mddev->chunk_sectors); |
62e1e389 N |
1810 | sb->level = cpu_to_le32(mddev->level); |
1811 | sb->layout = cpu_to_le32(mddev->layout); | |
688834e6 N |
1812 | if (test_bit(FailFast, &rdev->flags)) |
1813 | sb->devflags |= FailFast1; | |
1814 | else | |
1815 | sb->devflags &= ~FailFast1; | |
f0ca340c | 1816 | |
aeb9b211 N |
1817 | if (test_bit(WriteMostly, &rdev->flags)) |
1818 | sb->devflags |= WriteMostly1; | |
1819 | else | |
1820 | sb->devflags &= ~WriteMostly1; | |
c6563a8c N |
1821 | sb->data_offset = cpu_to_le64(rdev->data_offset); |
1822 | sb->data_size = cpu_to_le64(rdev->sectors); | |
aeb9b211 | 1823 | |
c3d9714e N |
1824 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) { |
1825 | sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset); | |
71c0805c | 1826 | sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); |
a654b9d8 | 1827 | } |
5fd6c1dc | 1828 | |
f2076e7d | 1829 | if (rdev->raid_disk >= 0 && !test_bit(Journal, &rdev->flags) && |
97e4f42d | 1830 | !test_bit(In_sync, &rdev->flags)) { |
93be75ff N |
1831 | sb->feature_map |= |
1832 | cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET); | |
1833 | sb->recovery_offset = | |
1834 | cpu_to_le64(rdev->recovery_offset); | |
f466722c N |
1835 | if (rdev->saved_raid_disk >= 0 && mddev->bitmap) |
1836 | sb->feature_map |= | |
1837 | cpu_to_le32(MD_FEATURE_RECOVERY_BITMAP); | |
5fd6c1dc | 1838 | } |
3069aa8d SL |
1839 | /* Note: recovery_offset and journal_tail share space */ |
1840 | if (test_bit(Journal, &rdev->flags)) | |
1841 | sb->journal_tail = cpu_to_le64(rdev->journal_tail); | |
2d78f8c4 N |
1842 | if (test_bit(Replacement, &rdev->flags)) |
1843 | sb->feature_map |= | |
1844 | cpu_to_le32(MD_FEATURE_REPLACEMENT); | |
5fd6c1dc | 1845 | |
f6705578 N |
1846 | if (mddev->reshape_position != MaxSector) { |
1847 | sb->feature_map |= cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); | |
1848 | sb->reshape_position = cpu_to_le64(mddev->reshape_position); | |
1849 | sb->new_layout = cpu_to_le32(mddev->new_layout); | |
1850 | sb->delta_disks = cpu_to_le32(mddev->delta_disks); | |
1851 | sb->new_level = cpu_to_le32(mddev->new_level); | |
664e7c41 | 1852 | sb->new_chunk = cpu_to_le32(mddev->new_chunk_sectors); |
2c810cdd N |
1853 | if (mddev->delta_disks == 0 && |
1854 | mddev->reshape_backwards) | |
1855 | sb->feature_map | |
1856 | |= cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS); | |
c6563a8c N |
1857 | if (rdev->new_data_offset != rdev->data_offset) { |
1858 | sb->feature_map | |
1859 | |= cpu_to_le32(MD_FEATURE_NEW_OFFSET); | |
1860 | sb->new_offset = cpu_to_le32((__u32)(rdev->new_data_offset | |
1861 | - rdev->data_offset)); | |
1862 | } | |
f6705578 | 1863 | } |
a654b9d8 | 1864 | |
3c462c88 GR |
1865 | if (mddev_is_clustered(mddev)) |
1866 | sb->feature_map |= cpu_to_le32(MD_FEATURE_CLUSTERED); | |
1867 | ||
2699b672 N |
1868 | if (rdev->badblocks.count == 0) |
1869 | /* Nothing to do for bad blocks*/ ; | |
1870 | else if (sb->bblog_offset == 0) | |
1871 | /* Cannot record bad blocks on this device */ | |
1872 | md_error(mddev, rdev); | |
1873 | else { | |
1874 | struct badblocks *bb = &rdev->badblocks; | |
1875 | u64 *bbp = (u64 *)page_address(rdev->bb_page); | |
1876 | u64 *p = bb->page; | |
1877 | sb->feature_map |= cpu_to_le32(MD_FEATURE_BAD_BLOCKS); | |
1878 | if (bb->changed) { | |
1879 | unsigned seq; | |
1880 | ||
1881 | retry: | |
1882 | seq = read_seqbegin(&bb->lock); | |
1883 | ||
1884 | memset(bbp, 0xff, PAGE_SIZE); | |
1885 | ||
1886 | for (i = 0 ; i < bb->count ; i++) { | |
35f9ac2d | 1887 | u64 internal_bb = p[i]; |
2699b672 N |
1888 | u64 store_bb = ((BB_OFFSET(internal_bb) << 10) |
1889 | | BB_LEN(internal_bb)); | |
35f9ac2d | 1890 | bbp[i] = cpu_to_le64(store_bb); |
2699b672 | 1891 | } |
d0962936 | 1892 | bb->changed = 0; |
2699b672 N |
1893 | if (read_seqretry(&bb->lock, seq)) |
1894 | goto retry; | |
1895 | ||
1896 | bb->sector = (rdev->sb_start + | |
1897 | (int)le32_to_cpu(sb->bblog_offset)); | |
1898 | bb->size = le16_to_cpu(sb->bblog_size); | |
2699b672 N |
1899 | } |
1900 | } | |
1901 | ||
1da177e4 | 1902 | max_dev = 0; |
dafb20fa | 1903 | rdev_for_each(rdev2, mddev) |
1da177e4 LT |
1904 | if (rdev2->desc_nr+1 > max_dev) |
1905 | max_dev = rdev2->desc_nr+1; | |
a778b73f | 1906 | |
70471daf N |
1907 | if (max_dev > le32_to_cpu(sb->max_dev)) { |
1908 | int bmask; | |
a778b73f | 1909 | sb->max_dev = cpu_to_le32(max_dev); |
70471daf N |
1910 | rdev->sb_size = max_dev * 2 + 256; |
1911 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; | |
1912 | if (rdev->sb_size & bmask) | |
1913 | rdev->sb_size = (rdev->sb_size | bmask) + 1; | |
ddcf3522 N |
1914 | } else |
1915 | max_dev = le32_to_cpu(sb->max_dev); | |
1916 | ||
1da177e4 | 1917 | for (i=0; i<max_dev;i++) |
8df72024 | 1918 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
f72ffdd6 | 1919 | |
a97b7896 SL |
1920 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) |
1921 | sb->feature_map |= cpu_to_le32(MD_FEATURE_JOURNAL); | |
f72ffdd6 | 1922 | |
ea0213e0 | 1923 | if (test_bit(MD_HAS_PPL, &mddev->flags)) { |
ddc08823 PB |
1924 | if (test_bit(MD_HAS_MULTIPLE_PPLS, &mddev->flags)) |
1925 | sb->feature_map |= | |
1926 | cpu_to_le32(MD_FEATURE_MULTIPLE_PPLS); | |
1927 | else | |
1928 | sb->feature_map |= cpu_to_le32(MD_FEATURE_PPL); | |
ea0213e0 AP |
1929 | sb->ppl.offset = cpu_to_le16(rdev->ppl.offset); |
1930 | sb->ppl.size = cpu_to_le16(rdev->ppl.size); | |
1931 | } | |
1932 | ||
dafb20fa | 1933 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1934 | i = rdev2->desc_nr; |
b2d444d7 | 1935 | if (test_bit(Faulty, &rdev2->flags)) |
c4d4c91b | 1936 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY); |
b2d444d7 | 1937 | else if (test_bit(In_sync, &rdev2->flags)) |
1da177e4 | 1938 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
a97b7896 | 1939 | else if (test_bit(Journal, &rdev2->flags)) |
bac624f3 | 1940 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_JOURNAL); |
93be75ff | 1941 | else if (rdev2->raid_disk >= 0) |
5fd6c1dc | 1942 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
1da177e4 | 1943 | else |
c4d4c91b | 1944 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
1da177e4 LT |
1945 | } |
1946 | ||
1da177e4 LT |
1947 | sb->sb_csum = calc_sb_1_csum(sb); |
1948 | } | |
1949 | ||
0cd17fec | 1950 | static unsigned long long |
3cb03002 | 1951 | super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec CW |
1952 | { |
1953 | struct mdp_superblock_1 *sb; | |
15f4a5fd | 1954 | sector_t max_sectors; |
58c0fed4 | 1955 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1956 | return 0; /* component must fit device */ |
c6563a8c N |
1957 | if (rdev->data_offset != rdev->new_data_offset) |
1958 | return 0; /* too confusing */ | |
0f420358 | 1959 | if (rdev->sb_start < rdev->data_offset) { |
0cd17fec | 1960 | /* minor versions 1 and 2; superblock before data */ |
77304d2a | 1961 | max_sectors = i_size_read(rdev->bdev->bd_inode) >> 9; |
15f4a5fd AN |
1962 | max_sectors -= rdev->data_offset; |
1963 | if (!num_sectors || num_sectors > max_sectors) | |
1964 | num_sectors = max_sectors; | |
c3d9714e | 1965 | } else if (rdev->mddev->bitmap_info.offset) { |
0cd17fec CW |
1966 | /* minor version 0 with bitmap we can't move */ |
1967 | return 0; | |
1968 | } else { | |
1969 | /* minor version 0; superblock after data */ | |
0f420358 | 1970 | sector_t sb_start; |
77304d2a | 1971 | sb_start = (i_size_read(rdev->bdev->bd_inode) >> 9) - 8*2; |
0f420358 | 1972 | sb_start &= ~(sector_t)(4*2 - 1); |
dd8ac336 | 1973 | max_sectors = rdev->sectors + sb_start - rdev->sb_start; |
15f4a5fd AN |
1974 | if (!num_sectors || num_sectors > max_sectors) |
1975 | num_sectors = max_sectors; | |
0f420358 | 1976 | rdev->sb_start = sb_start; |
0cd17fec | 1977 | } |
65a06f06 | 1978 | sb = page_address(rdev->sb_page); |
15f4a5fd | 1979 | sb->data_size = cpu_to_le64(num_sectors); |
3fb632e4 | 1980 | sb->super_offset = cpu_to_le64(rdev->sb_start); |
0cd17fec | 1981 | sb->sb_csum = calc_sb_1_csum(sb); |
46533ff7 N |
1982 | do { |
1983 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
1984 | rdev->sb_page); | |
1985 | } while (md_super_wait(rdev->mddev) < 0); | |
c26a44ed | 1986 | return num_sectors; |
c6563a8c N |
1987 | |
1988 | } | |
1989 | ||
1990 | static int | |
1991 | super_1_allow_new_offset(struct md_rdev *rdev, | |
1992 | unsigned long long new_offset) | |
1993 | { | |
1994 | /* All necessary checks on new >= old have been done */ | |
1995 | struct bitmap *bitmap; | |
1996 | if (new_offset >= rdev->data_offset) | |
1997 | return 1; | |
1998 | ||
1999 | /* with 1.0 metadata, there is no metadata to tread on | |
2000 | * so we can always move back */ | |
2001 | if (rdev->mddev->minor_version == 0) | |
2002 | return 1; | |
2003 | ||
2004 | /* otherwise we must be sure not to step on | |
2005 | * any metadata, so stay: | |
2006 | * 36K beyond start of superblock | |
2007 | * beyond end of badblocks | |
2008 | * beyond write-intent bitmap | |
2009 | */ | |
2010 | if (rdev->sb_start + (32+4)*2 > new_offset) | |
2011 | return 0; | |
2012 | bitmap = rdev->mddev->bitmap; | |
2013 | if (bitmap && !rdev->mddev->bitmap_info.file && | |
2014 | rdev->sb_start + rdev->mddev->bitmap_info.offset + | |
1ec885cd | 2015 | bitmap->storage.file_pages * (PAGE_SIZE>>9) > new_offset) |
c6563a8c N |
2016 | return 0; |
2017 | if (rdev->badblocks.sector + rdev->badblocks.size > new_offset) | |
2018 | return 0; | |
2019 | ||
2020 | return 1; | |
0cd17fec | 2021 | } |
1da177e4 | 2022 | |
75c96f85 | 2023 | static struct super_type super_types[] = { |
1da177e4 LT |
2024 | [0] = { |
2025 | .name = "0.90.0", | |
2026 | .owner = THIS_MODULE, | |
0cd17fec CW |
2027 | .load_super = super_90_load, |
2028 | .validate_super = super_90_validate, | |
2029 | .sync_super = super_90_sync, | |
2030 | .rdev_size_change = super_90_rdev_size_change, | |
c6563a8c | 2031 | .allow_new_offset = super_90_allow_new_offset, |
1da177e4 LT |
2032 | }, |
2033 | [1] = { | |
2034 | .name = "md-1", | |
2035 | .owner = THIS_MODULE, | |
0cd17fec CW |
2036 | .load_super = super_1_load, |
2037 | .validate_super = super_1_validate, | |
2038 | .sync_super = super_1_sync, | |
2039 | .rdev_size_change = super_1_rdev_size_change, | |
c6563a8c | 2040 | .allow_new_offset = super_1_allow_new_offset, |
1da177e4 LT |
2041 | }, |
2042 | }; | |
1da177e4 | 2043 | |
fd01b88c | 2044 | static void sync_super(struct mddev *mddev, struct md_rdev *rdev) |
076f968b JB |
2045 | { |
2046 | if (mddev->sync_super) { | |
2047 | mddev->sync_super(mddev, rdev); | |
2048 | return; | |
2049 | } | |
2050 | ||
2051 | BUG_ON(mddev->major_version >= ARRAY_SIZE(super_types)); | |
2052 | ||
2053 | super_types[mddev->major_version].sync_super(mddev, rdev); | |
2054 | } | |
2055 | ||
fd01b88c | 2056 | static int match_mddev_units(struct mddev *mddev1, struct mddev *mddev2) |
1da177e4 | 2057 | { |
3cb03002 | 2058 | struct md_rdev *rdev, *rdev2; |
1da177e4 | 2059 | |
4b80991c | 2060 | rcu_read_lock(); |
0b020e85 SL |
2061 | rdev_for_each_rcu(rdev, mddev1) { |
2062 | if (test_bit(Faulty, &rdev->flags) || | |
2063 | test_bit(Journal, &rdev->flags) || | |
2064 | rdev->raid_disk == -1) | |
2065 | continue; | |
2066 | rdev_for_each_rcu(rdev2, mddev2) { | |
2067 | if (test_bit(Faulty, &rdev2->flags) || | |
2068 | test_bit(Journal, &rdev2->flags) || | |
2069 | rdev2->raid_disk == -1) | |
2070 | continue; | |
7dd5e7c3 | 2071 | if (rdev->bdev->bd_contains == |
4b80991c N |
2072 | rdev2->bdev->bd_contains) { |
2073 | rcu_read_unlock(); | |
7dd5e7c3 | 2074 | return 1; |
4b80991c | 2075 | } |
0b020e85 SL |
2076 | } |
2077 | } | |
4b80991c | 2078 | rcu_read_unlock(); |
1da177e4 LT |
2079 | return 0; |
2080 | } | |
2081 | ||
2082 | static LIST_HEAD(pending_raid_disks); | |
2083 | ||
ac5e7113 AN |
2084 | /* |
2085 | * Try to register data integrity profile for an mddev | |
2086 | * | |
2087 | * This is called when an array is started and after a disk has been kicked | |
2088 | * from the array. It only succeeds if all working and active component devices | |
2089 | * are integrity capable with matching profiles. | |
2090 | */ | |
fd01b88c | 2091 | int md_integrity_register(struct mddev *mddev) |
ac5e7113 | 2092 | { |
3cb03002 | 2093 | struct md_rdev *rdev, *reference = NULL; |
ac5e7113 AN |
2094 | |
2095 | if (list_empty(&mddev->disks)) | |
2096 | return 0; /* nothing to do */ | |
629acb6a JB |
2097 | if (!mddev->gendisk || blk_get_integrity(mddev->gendisk)) |
2098 | return 0; /* shouldn't register, or already is */ | |
dafb20fa | 2099 | rdev_for_each(rdev, mddev) { |
ac5e7113 AN |
2100 | /* skip spares and non-functional disks */ |
2101 | if (test_bit(Faulty, &rdev->flags)) | |
2102 | continue; | |
2103 | if (rdev->raid_disk < 0) | |
2104 | continue; | |
ac5e7113 AN |
2105 | if (!reference) { |
2106 | /* Use the first rdev as the reference */ | |
2107 | reference = rdev; | |
2108 | continue; | |
2109 | } | |
2110 | /* does this rdev's profile match the reference profile? */ | |
2111 | if (blk_integrity_compare(reference->bdev->bd_disk, | |
2112 | rdev->bdev->bd_disk) < 0) | |
2113 | return -EINVAL; | |
2114 | } | |
89078d57 MP |
2115 | if (!reference || !bdev_get_integrity(reference->bdev)) |
2116 | return 0; | |
ac5e7113 AN |
2117 | /* |
2118 | * All component devices are integrity capable and have matching | |
2119 | * profiles, register the common profile for the md device. | |
2120 | */ | |
25520d55 MP |
2121 | blk_integrity_register(mddev->gendisk, |
2122 | bdev_get_integrity(reference->bdev)); | |
2123 | ||
9d48739e | 2124 | pr_debug("md: data integrity enabled on %s\n", mdname(mddev)); |
a91a2785 | 2125 | if (bioset_integrity_create(mddev->bio_set, BIO_POOL_SIZE)) { |
9d48739e | 2126 | pr_err("md: failed to create integrity pool for %s\n", |
a91a2785 MP |
2127 | mdname(mddev)); |
2128 | return -EINVAL; | |
2129 | } | |
ac5e7113 AN |
2130 | return 0; |
2131 | } | |
2132 | EXPORT_SYMBOL(md_integrity_register); | |
2133 | ||
1501efad DW |
2134 | /* |
2135 | * Attempt to add an rdev, but only if it is consistent with the current | |
2136 | * integrity profile | |
2137 | */ | |
2138 | int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev) | |
3f9d99c1 | 2139 | { |
2863b9eb JB |
2140 | struct blk_integrity *bi_rdev; |
2141 | struct blk_integrity *bi_mddev; | |
1501efad | 2142 | char name[BDEVNAME_SIZE]; |
2863b9eb JB |
2143 | |
2144 | if (!mddev->gendisk) | |
1501efad | 2145 | return 0; |
2863b9eb JB |
2146 | |
2147 | bi_rdev = bdev_get_integrity(rdev->bdev); | |
2148 | bi_mddev = blk_get_integrity(mddev->gendisk); | |
3f9d99c1 | 2149 | |
ac5e7113 | 2150 | if (!bi_mddev) /* nothing to do */ |
1501efad DW |
2151 | return 0; |
2152 | ||
2153 | if (blk_integrity_compare(mddev->gendisk, rdev->bdev->bd_disk) != 0) { | |
9d48739e N |
2154 | pr_err("%s: incompatible integrity profile for %s\n", |
2155 | mdname(mddev), bdevname(rdev->bdev, name)); | |
1501efad DW |
2156 | return -ENXIO; |
2157 | } | |
2158 | ||
2159 | return 0; | |
3f9d99c1 | 2160 | } |
ac5e7113 | 2161 | EXPORT_SYMBOL(md_integrity_add_rdev); |
3f9d99c1 | 2162 | |
f72ffdd6 | 2163 | static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) |
1da177e4 | 2164 | { |
7dd5e7c3 | 2165 | char b[BDEVNAME_SIZE]; |
f637b9f9 | 2166 | struct kobject *ko; |
5e55e2f5 | 2167 | int err; |
1da177e4 | 2168 | |
11e2ede0 DW |
2169 | /* prevent duplicates */ |
2170 | if (find_rdev(mddev, rdev->bdev->bd_dev)) | |
2171 | return -EEXIST; | |
2172 | ||
97b20ef7 N |
2173 | if ((bdev_read_only(rdev->bdev) || bdev_read_only(rdev->meta_bdev)) && |
2174 | mddev->pers) | |
2175 | return -EROFS; | |
2176 | ||
dd8ac336 | 2177 | /* make sure rdev->sectors exceeds mddev->dev_sectors */ |
f6b6ec5c SL |
2178 | if (!test_bit(Journal, &rdev->flags) && |
2179 | rdev->sectors && | |
2180 | (mddev->dev_sectors == 0 || rdev->sectors < mddev->dev_sectors)) { | |
a778b73f N |
2181 | if (mddev->pers) { |
2182 | /* Cannot change size, so fail | |
2183 | * If mddev->level <= 0, then we don't care | |
2184 | * about aligning sizes (e.g. linear) | |
2185 | */ | |
2186 | if (mddev->level > 0) | |
2187 | return -ENOSPC; | |
2188 | } else | |
dd8ac336 | 2189 | mddev->dev_sectors = rdev->sectors; |
2bf071bf | 2190 | } |
1da177e4 LT |
2191 | |
2192 | /* Verify rdev->desc_nr is unique. | |
2193 | * If it is -1, assign a free number, else | |
2194 | * check number is not in use | |
2195 | */ | |
4878e9eb | 2196 | rcu_read_lock(); |
1da177e4 LT |
2197 | if (rdev->desc_nr < 0) { |
2198 | int choice = 0; | |
4878e9eb N |
2199 | if (mddev->pers) |
2200 | choice = mddev->raid_disks; | |
57d051dc | 2201 | while (md_find_rdev_nr_rcu(mddev, choice)) |
1da177e4 LT |
2202 | choice++; |
2203 | rdev->desc_nr = choice; | |
2204 | } else { | |
57d051dc | 2205 | if (md_find_rdev_nr_rcu(mddev, rdev->desc_nr)) { |
4878e9eb | 2206 | rcu_read_unlock(); |
1da177e4 | 2207 | return -EBUSY; |
4878e9eb | 2208 | } |
1da177e4 | 2209 | } |
4878e9eb | 2210 | rcu_read_unlock(); |
f6b6ec5c SL |
2211 | if (!test_bit(Journal, &rdev->flags) && |
2212 | mddev->max_disks && rdev->desc_nr >= mddev->max_disks) { | |
9d48739e N |
2213 | pr_warn("md: %s: array is limited to %d devices\n", |
2214 | mdname(mddev), mddev->max_disks); | |
de01dfad N |
2215 | return -EBUSY; |
2216 | } | |
19133a42 | 2217 | bdevname(rdev->bdev,b); |
90a9befb | 2218 | strreplace(b, '/', '!'); |
649316b2 | 2219 | |
1da177e4 | 2220 | rdev->mddev = mddev; |
9d48739e | 2221 | pr_debug("md: bind<%s>\n", b); |
86e6ffdd | 2222 | |
b2d6db58 | 2223 | if ((err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b))) |
5e55e2f5 | 2224 | goto fail; |
86e6ffdd | 2225 | |
0762b8bd | 2226 | ko = &part_to_dev(rdev->bdev->bd_part)->kobj; |
00bcb4ac N |
2227 | if (sysfs_create_link(&rdev->kobj, ko, "block")) |
2228 | /* failure here is OK */; | |
2229 | rdev->sysfs_state = sysfs_get_dirent_safe(rdev->kobj.sd, "state"); | |
3c0ee63a | 2230 | |
4b80991c | 2231 | list_add_rcu(&rdev->same_set, &mddev->disks); |
e09b457b | 2232 | bd_link_disk_holder(rdev->bdev, mddev->gendisk); |
4044ba58 N |
2233 | |
2234 | /* May as well allow recovery to be retried once */ | |
5389042f | 2235 | mddev->recovery_disabled++; |
3f9d99c1 | 2236 | |
1da177e4 | 2237 | return 0; |
5e55e2f5 N |
2238 | |
2239 | fail: | |
9d48739e N |
2240 | pr_warn("md: failed to register dev-%s for %s\n", |
2241 | b, mdname(mddev)); | |
5e55e2f5 | 2242 | return err; |
1da177e4 LT |
2243 | } |
2244 | ||
177a99b2 | 2245 | static void md_delayed_delete(struct work_struct *ws) |
5792a285 | 2246 | { |
3cb03002 | 2247 | struct md_rdev *rdev = container_of(ws, struct md_rdev, del_work); |
5792a285 | 2248 | kobject_del(&rdev->kobj); |
177a99b2 | 2249 | kobject_put(&rdev->kobj); |
5792a285 N |
2250 | } |
2251 | ||
f72ffdd6 | 2252 | static void unbind_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2253 | { |
2254 | char b[BDEVNAME_SIZE]; | |
403df478 | 2255 | |
49731baa | 2256 | bd_unlink_disk_holder(rdev->bdev, rdev->mddev->gendisk); |
4b80991c | 2257 | list_del_rcu(&rdev->same_set); |
9d48739e | 2258 | pr_debug("md: unbind<%s>\n", bdevname(rdev->bdev,b)); |
1da177e4 | 2259 | rdev->mddev = NULL; |
86e6ffdd | 2260 | sysfs_remove_link(&rdev->kobj, "block"); |
3c0ee63a N |
2261 | sysfs_put(rdev->sysfs_state); |
2262 | rdev->sysfs_state = NULL; | |
2230dfe4 | 2263 | rdev->badblocks.count = 0; |
5792a285 | 2264 | /* We need to delay this, otherwise we can deadlock when |
4b80991c N |
2265 | * writing to 'remove' to "dev/state". We also need |
2266 | * to delay it due to rcu usage. | |
5792a285 | 2267 | */ |
4b80991c | 2268 | synchronize_rcu(); |
177a99b2 N |
2269 | INIT_WORK(&rdev->del_work, md_delayed_delete); |
2270 | kobject_get(&rdev->kobj); | |
e804ac78 | 2271 | queue_work(md_misc_wq, &rdev->del_work); |
1da177e4 LT |
2272 | } |
2273 | ||
2274 | /* | |
2275 | * prevent the device from being mounted, repartitioned or | |
2276 | * otherwise reused by a RAID array (or any other kernel | |
2277 | * subsystem), by bd_claiming the device. | |
2278 | */ | |
3cb03002 | 2279 | static int lock_rdev(struct md_rdev *rdev, dev_t dev, int shared) |
1da177e4 LT |
2280 | { |
2281 | int err = 0; | |
2282 | struct block_device *bdev; | |
2283 | char b[BDEVNAME_SIZE]; | |
2284 | ||
d4d77629 | 2285 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, |
3cb03002 | 2286 | shared ? (struct md_rdev *)lock_rdev : rdev); |
1da177e4 | 2287 | if (IS_ERR(bdev)) { |
9d48739e | 2288 | pr_warn("md: could not open %s.\n", __bdevname(dev, b)); |
1da177e4 LT |
2289 | return PTR_ERR(bdev); |
2290 | } | |
1da177e4 LT |
2291 | rdev->bdev = bdev; |
2292 | return err; | |
2293 | } | |
2294 | ||
3cb03002 | 2295 | static void unlock_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2296 | { |
2297 | struct block_device *bdev = rdev->bdev; | |
2298 | rdev->bdev = NULL; | |
e525fd89 | 2299 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
1da177e4 LT |
2300 | } |
2301 | ||
2302 | void md_autodetect_dev(dev_t dev); | |
2303 | ||
f72ffdd6 | 2304 | static void export_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2305 | { |
2306 | char b[BDEVNAME_SIZE]; | |
403df478 | 2307 | |
9d48739e | 2308 | pr_debug("md: export_rdev(%s)\n", bdevname(rdev->bdev,b)); |
545c8795 | 2309 | md_rdev_clear(rdev); |
1da177e4 | 2310 | #ifndef MODULE |
d0fae18f N |
2311 | if (test_bit(AutoDetected, &rdev->flags)) |
2312 | md_autodetect_dev(rdev->bdev->bd_dev); | |
1da177e4 LT |
2313 | #endif |
2314 | unlock_rdev(rdev); | |
86e6ffdd | 2315 | kobject_put(&rdev->kobj); |
1da177e4 LT |
2316 | } |
2317 | ||
fb56dfef | 2318 | void md_kick_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2319 | { |
2320 | unbind_rdev_from_array(rdev); | |
2321 | export_rdev(rdev); | |
2322 | } | |
fb56dfef | 2323 | EXPORT_SYMBOL_GPL(md_kick_rdev_from_array); |
1da177e4 | 2324 | |
fd01b88c | 2325 | static void export_array(struct mddev *mddev) |
1da177e4 | 2326 | { |
0638bb0e | 2327 | struct md_rdev *rdev; |
1da177e4 | 2328 | |
0638bb0e N |
2329 | while (!list_empty(&mddev->disks)) { |
2330 | rdev = list_first_entry(&mddev->disks, struct md_rdev, | |
2331 | same_set); | |
fb56dfef | 2332 | md_kick_rdev_from_array(rdev); |
1da177e4 | 2333 | } |
1da177e4 LT |
2334 | mddev->raid_disks = 0; |
2335 | mddev->major_version = 0; | |
2336 | } | |
2337 | ||
6497709b N |
2338 | static bool set_in_sync(struct mddev *mddev) |
2339 | { | |
efa4b77b | 2340 | lockdep_assert_held(&mddev->lock); |
4ad23a97 N |
2341 | if (!mddev->in_sync) { |
2342 | mddev->sync_checkers++; | |
2343 | spin_unlock(&mddev->lock); | |
2344 | percpu_ref_switch_to_atomic_sync(&mddev->writes_pending); | |
2345 | spin_lock(&mddev->lock); | |
2346 | if (!mddev->in_sync && | |
2347 | percpu_ref_is_zero(&mddev->writes_pending)) { | |
6497709b | 2348 | mddev->in_sync = 1; |
4ad23a97 N |
2349 | /* |
2350 | * Ensure ->in_sync is visible before we clear | |
2351 | * ->sync_checkers. | |
2352 | */ | |
55cc39f3 | 2353 | smp_mb(); |
6497709b N |
2354 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2355 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
2356 | } | |
4ad23a97 N |
2357 | if (--mddev->sync_checkers == 0) |
2358 | percpu_ref_switch_to_percpu(&mddev->writes_pending); | |
6497709b N |
2359 | } |
2360 | if (mddev->safemode == 1) | |
2361 | mddev->safemode = 0; | |
2362 | return mddev->in_sync; | |
2363 | } | |
2364 | ||
f72ffdd6 | 2365 | static void sync_sbs(struct mddev *mddev, int nospares) |
1da177e4 | 2366 | { |
42543769 N |
2367 | /* Update each superblock (in-memory image), but |
2368 | * if we are allowed to, skip spares which already | |
2369 | * have the right event counter, or have one earlier | |
2370 | * (which would mean they aren't being marked as dirty | |
2371 | * with the rest of the array) | |
2372 | */ | |
3cb03002 | 2373 | struct md_rdev *rdev; |
dafb20fa | 2374 | rdev_for_each(rdev, mddev) { |
42543769 N |
2375 | if (rdev->sb_events == mddev->events || |
2376 | (nospares && | |
2377 | rdev->raid_disk < 0 && | |
42543769 N |
2378 | rdev->sb_events+1 == mddev->events)) { |
2379 | /* Don't update this superblock */ | |
2380 | rdev->sb_loaded = 2; | |
2381 | } else { | |
076f968b | 2382 | sync_super(mddev, rdev); |
42543769 N |
2383 | rdev->sb_loaded = 1; |
2384 | } | |
1da177e4 LT |
2385 | } |
2386 | } | |
2387 | ||
2aa82191 GR |
2388 | static bool does_sb_need_changing(struct mddev *mddev) |
2389 | { | |
2390 | struct md_rdev *rdev; | |
2391 | struct mdp_superblock_1 *sb; | |
2392 | int role; | |
2393 | ||
2394 | /* Find a good rdev */ | |
2395 | rdev_for_each(rdev, mddev) | |
2396 | if ((rdev->raid_disk >= 0) && !test_bit(Faulty, &rdev->flags)) | |
2397 | break; | |
2398 | ||
2399 | /* No good device found. */ | |
2400 | if (!rdev) | |
2401 | return false; | |
2402 | ||
2403 | sb = page_address(rdev->sb_page); | |
2404 | /* Check if a device has become faulty or a spare become active */ | |
2405 | rdev_for_each(rdev, mddev) { | |
2406 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
2407 | /* Device activated? */ | |
2408 | if (role == 0xffff && rdev->raid_disk >=0 && | |
2409 | !test_bit(Faulty, &rdev->flags)) | |
2410 | return true; | |
2411 | /* Device turned faulty? */ | |
2412 | if (test_bit(Faulty, &rdev->flags) && (role < 0xfffd)) | |
2413 | return true; | |
2414 | } | |
2415 | ||
2416 | /* Check if any mddev parameters have changed */ | |
2417 | if ((mddev->dev_sectors != le64_to_cpu(sb->size)) || | |
2418 | (mddev->reshape_position != le64_to_cpu(sb->reshape_position)) || | |
13459213 | 2419 | (mddev->layout != le32_to_cpu(sb->layout)) || |
2aa82191 GR |
2420 | (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) || |
2421 | (mddev->chunk_sectors != le32_to_cpu(sb->chunksize))) | |
2422 | return true; | |
2423 | ||
2424 | return false; | |
2425 | } | |
2426 | ||
1aee41f6 | 2427 | void md_update_sb(struct mddev *mddev, int force_change) |
1da177e4 | 2428 | { |
3cb03002 | 2429 | struct md_rdev *rdev; |
06d91a5f | 2430 | int sync_req; |
42543769 | 2431 | int nospares = 0; |
2699b672 | 2432 | int any_badblocks_changed = 0; |
23b63f9f | 2433 | int ret = -1; |
1da177e4 | 2434 | |
d87f064f N |
2435 | if (mddev->ro) { |
2436 | if (force_change) | |
2953079c | 2437 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
d87f064f N |
2438 | return; |
2439 | } | |
2aa82191 | 2440 | |
2c97cf13 | 2441 | repeat: |
2aa82191 | 2442 | if (mddev_is_clustered(mddev)) { |
2953079c | 2443 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
2aa82191 | 2444 | force_change = 1; |
2953079c | 2445 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
85ad1d13 | 2446 | nospares = 1; |
23b63f9f | 2447 | ret = md_cluster_ops->metadata_update_start(mddev); |
2aa82191 GR |
2448 | /* Has someone else has updated the sb */ |
2449 | if (!does_sb_need_changing(mddev)) { | |
23b63f9f GJ |
2450 | if (ret == 0) |
2451 | md_cluster_ops->metadata_update_cancel(mddev); | |
2953079c SL |
2452 | bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2453 | BIT(MD_SB_CHANGE_DEVS) | | |
2454 | BIT(MD_SB_CHANGE_CLEAN)); | |
2aa82191 GR |
2455 | return; |
2456 | } | |
2457 | } | |
2c97cf13 | 2458 | |
db0505d3 N |
2459 | /* |
2460 | * First make sure individual recovery_offsets are correct | |
2461 | * curr_resync_completed can only be used during recovery. | |
2462 | * During reshape/resync it might use array-addresses rather | |
2463 | * that device addresses. | |
2464 | */ | |
dafb20fa | 2465 | rdev_for_each(rdev, mddev) { |
3a3a5ddb N |
2466 | if (rdev->raid_disk >= 0 && |
2467 | mddev->delta_disks >= 0 && | |
db0505d3 N |
2468 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
2469 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery) && | |
2470 | !test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
f2076e7d | 2471 | !test_bit(Journal, &rdev->flags) && |
3a3a5ddb N |
2472 | !test_bit(In_sync, &rdev->flags) && |
2473 | mddev->curr_resync_completed > rdev->recovery_offset) | |
2474 | rdev->recovery_offset = mddev->curr_resync_completed; | |
2475 | ||
f72ffdd6 | 2476 | } |
bd52b746 | 2477 | if (!mddev->persistent) { |
2953079c SL |
2478 | clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2479 | clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
de393cde | 2480 | if (!mddev->external) { |
2953079c | 2481 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
dafb20fa | 2482 | rdev_for_each(rdev, mddev) { |
de393cde | 2483 | if (rdev->badblocks.changed) { |
d0962936 | 2484 | rdev->badblocks.changed = 0; |
fc974ee2 | 2485 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2486 | md_error(mddev, rdev); |
2487 | } | |
2488 | clear_bit(Blocked, &rdev->flags); | |
2489 | clear_bit(BlockedBadBlocks, &rdev->flags); | |
2490 | wake_up(&rdev->blocked_wait); | |
2491 | } | |
2492 | } | |
3a3a5ddb N |
2493 | wake_up(&mddev->sb_wait); |
2494 | return; | |
2495 | } | |
2496 | ||
85572d7c | 2497 | spin_lock(&mddev->lock); |
84692195 | 2498 | |
9ebc6ef1 | 2499 | mddev->utime = ktime_get_real_seconds(); |
3a3a5ddb | 2500 | |
2953079c | 2501 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
850b2b42 | 2502 | force_change = 1; |
2953079c | 2503 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
850b2b42 N |
2504 | /* just a clean<-> dirty transition, possibly leave spares alone, |
2505 | * though if events isn't the right even/odd, we will have to do | |
2506 | * spares after all | |
2507 | */ | |
2508 | nospares = 1; | |
2509 | if (force_change) | |
2510 | nospares = 0; | |
2511 | if (mddev->degraded) | |
84692195 N |
2512 | /* If the array is degraded, then skipping spares is both |
2513 | * dangerous and fairly pointless. | |
2514 | * Dangerous because a device that was removed from the array | |
2515 | * might have a event_count that still looks up-to-date, | |
2516 | * so it can be re-added without a resync. | |
2517 | * Pointless because if there are any spares to skip, | |
2518 | * then a recovery will happen and soon that array won't | |
2519 | * be degraded any more and the spare can go back to sleep then. | |
2520 | */ | |
850b2b42 | 2521 | nospares = 0; |
84692195 | 2522 | |
06d91a5f | 2523 | sync_req = mddev->in_sync; |
42543769 N |
2524 | |
2525 | /* If this is just a dirty<->clean transition, and the array is clean | |
2526 | * and 'events' is odd, we can roll back to the previous clean state */ | |
850b2b42 | 2527 | if (nospares |
42543769 | 2528 | && (mddev->in_sync && mddev->recovery_cp == MaxSector) |
a8707c08 N |
2529 | && mddev->can_decrease_events |
2530 | && mddev->events != 1) { | |
42543769 | 2531 | mddev->events--; |
a8707c08 N |
2532 | mddev->can_decrease_events = 0; |
2533 | } else { | |
42543769 N |
2534 | /* otherwise we have to go forward and ... */ |
2535 | mddev->events ++; | |
a8707c08 | 2536 | mddev->can_decrease_events = nospares; |
42543769 | 2537 | } |
1da177e4 | 2538 | |
403df478 N |
2539 | /* |
2540 | * This 64-bit counter should never wrap. | |
2541 | * Either we are in around ~1 trillion A.C., assuming | |
2542 | * 1 reboot per second, or we have a bug... | |
2543 | */ | |
2544 | WARN_ON(mddev->events == 0); | |
2699b672 | 2545 | |
dafb20fa | 2546 | rdev_for_each(rdev, mddev) { |
2699b672 N |
2547 | if (rdev->badblocks.changed) |
2548 | any_badblocks_changed++; | |
de393cde N |
2549 | if (test_bit(Faulty, &rdev->flags)) |
2550 | set_bit(FaultRecorded, &rdev->flags); | |
2551 | } | |
2699b672 | 2552 | |
e691063a | 2553 | sync_sbs(mddev, nospares); |
85572d7c | 2554 | spin_unlock(&mddev->lock); |
1da177e4 | 2555 | |
36a4e1fe N |
2556 | pr_debug("md: updating %s RAID superblock on device (in sync %d)\n", |
2557 | mdname(mddev), mddev->in_sync); | |
1da177e4 | 2558 | |
504634f6 SL |
2559 | if (mddev->queue) |
2560 | blk_add_trace_msg(mddev->queue, "md md_update_sb"); | |
46533ff7 | 2561 | rewrite: |
4ad13663 | 2562 | bitmap_update_sb(mddev->bitmap); |
dafb20fa | 2563 | rdev_for_each(rdev, mddev) { |
1da177e4 | 2564 | char b[BDEVNAME_SIZE]; |
36a4e1fe | 2565 | |
42543769 N |
2566 | if (rdev->sb_loaded != 1) |
2567 | continue; /* no noise on spare devices */ | |
1da177e4 | 2568 | |
f466722c | 2569 | if (!test_bit(Faulty, &rdev->flags)) { |
7bfa19f2 | 2570 | md_super_write(mddev,rdev, |
0f420358 | 2571 | rdev->sb_start, rdev->sb_size, |
7bfa19f2 | 2572 | rdev->sb_page); |
36a4e1fe N |
2573 | pr_debug("md: (write) %s's sb offset: %llu\n", |
2574 | bdevname(rdev->bdev, b), | |
2575 | (unsigned long long)rdev->sb_start); | |
42543769 | 2576 | rdev->sb_events = mddev->events; |
2699b672 N |
2577 | if (rdev->badblocks.size) { |
2578 | md_super_write(mddev, rdev, | |
2579 | rdev->badblocks.sector, | |
2580 | rdev->badblocks.size << 9, | |
2581 | rdev->bb_page); | |
2582 | rdev->badblocks.size = 0; | |
2583 | } | |
7bfa19f2 | 2584 | |
f466722c | 2585 | } else |
36a4e1fe N |
2586 | pr_debug("md: %s (skipping faulty)\n", |
2587 | bdevname(rdev->bdev, b)); | |
d70ed2e4 | 2588 | |
7bfa19f2 | 2589 | if (mddev->level == LEVEL_MULTIPATH) |
1da177e4 LT |
2590 | /* only need to write one superblock... */ |
2591 | break; | |
2592 | } | |
46533ff7 N |
2593 | if (md_super_wait(mddev) < 0) |
2594 | goto rewrite; | |
2953079c | 2595 | /* if there was a failure, MD_SB_CHANGE_DEVS was set, and we re-write super */ |
7bfa19f2 | 2596 | |
2c97cf13 GJ |
2597 | if (mddev_is_clustered(mddev) && ret == 0) |
2598 | md_cluster_ops->metadata_update_finish(mddev); | |
2599 | ||
850b2b42 | 2600 | if (mddev->in_sync != sync_req || |
2953079c SL |
2601 | !bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2602 | BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_CLEAN))) | |
06d91a5f | 2603 | /* have to write it out again */ |
06d91a5f | 2604 | goto repeat; |
3d310eb7 | 2605 | wake_up(&mddev->sb_wait); |
acb180b0 N |
2606 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
2607 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); | |
06d91a5f | 2608 | |
dafb20fa | 2609 | rdev_for_each(rdev, mddev) { |
de393cde N |
2610 | if (test_and_clear_bit(FaultRecorded, &rdev->flags)) |
2611 | clear_bit(Blocked, &rdev->flags); | |
2612 | ||
2613 | if (any_badblocks_changed) | |
fc974ee2 | 2614 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2615 | clear_bit(BlockedBadBlocks, &rdev->flags); |
2616 | wake_up(&rdev->blocked_wait); | |
2617 | } | |
1da177e4 | 2618 | } |
1aee41f6 | 2619 | EXPORT_SYMBOL(md_update_sb); |
1da177e4 | 2620 | |
a6da4ef8 GR |
2621 | static int add_bound_rdev(struct md_rdev *rdev) |
2622 | { | |
2623 | struct mddev *mddev = rdev->mddev; | |
2624 | int err = 0; | |
87d4d916 | 2625 | bool add_journal = test_bit(Journal, &rdev->flags); |
a6da4ef8 | 2626 | |
87d4d916 | 2627 | if (!mddev->pers->hot_remove_disk || add_journal) { |
a6da4ef8 GR |
2628 | /* If there is hot_add_disk but no hot_remove_disk |
2629 | * then added disks for geometry changes, | |
2630 | * and should be added immediately. | |
2631 | */ | |
2632 | super_types[mddev->major_version]. | |
2633 | validate_super(mddev, rdev); | |
87d4d916 SL |
2634 | if (add_journal) |
2635 | mddev_suspend(mddev); | |
a6da4ef8 | 2636 | err = mddev->pers->hot_add_disk(mddev, rdev); |
87d4d916 SL |
2637 | if (add_journal) |
2638 | mddev_resume(mddev); | |
a6da4ef8 | 2639 | if (err) { |
db767672 | 2640 | md_kick_rdev_from_array(rdev); |
a6da4ef8 GR |
2641 | return err; |
2642 | } | |
2643 | } | |
2644 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2645 | ||
2953079c | 2646 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a6da4ef8 GR |
2647 | if (mddev->degraded) |
2648 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
2649 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
2650 | md_new_event(mddev); | |
2651 | md_wakeup_thread(mddev->thread); | |
2652 | return 0; | |
2653 | } | |
1da177e4 | 2654 | |
7f6ce769 | 2655 | /* words written to sysfs files may, or may not, be \n terminated. |
bce74dac N |
2656 | * We want to accept with case. For this we use cmd_match. |
2657 | */ | |
2658 | static int cmd_match(const char *cmd, const char *str) | |
2659 | { | |
2660 | /* See if cmd, written into a sysfs file, matches | |
2661 | * str. They must either be the same, or cmd can | |
2662 | * have a trailing newline | |
2663 | */ | |
2664 | while (*cmd && *str && *cmd == *str) { | |
2665 | cmd++; | |
2666 | str++; | |
2667 | } | |
2668 | if (*cmd == '\n') | |
2669 | cmd++; | |
2670 | if (*str || *cmd) | |
2671 | return 0; | |
2672 | return 1; | |
2673 | } | |
2674 | ||
86e6ffdd N |
2675 | struct rdev_sysfs_entry { |
2676 | struct attribute attr; | |
3cb03002 N |
2677 | ssize_t (*show)(struct md_rdev *, char *); |
2678 | ssize_t (*store)(struct md_rdev *, const char *, size_t); | |
86e6ffdd N |
2679 | }; |
2680 | ||
2681 | static ssize_t | |
3cb03002 | 2682 | state_show(struct md_rdev *rdev, char *page) |
86e6ffdd | 2683 | { |
35b785f7 | 2684 | char *sep = ","; |
20a49ff6 | 2685 | size_t len = 0; |
6aa7de05 | 2686 | unsigned long flags = READ_ONCE(rdev->flags); |
86e6ffdd | 2687 | |
758bfc8a | 2688 | if (test_bit(Faulty, &flags) || |
dcbcb486 TM |
2689 | (!test_bit(ExternalBbl, &flags) && |
2690 | rdev->badblocks.unacked_exist)) | |
35b785f7 TM |
2691 | len += sprintf(page+len, "faulty%s", sep); |
2692 | if (test_bit(In_sync, &flags)) | |
2693 | len += sprintf(page+len, "in_sync%s", sep); | |
2694 | if (test_bit(Journal, &flags)) | |
2695 | len += sprintf(page+len, "journal%s", sep); | |
2696 | if (test_bit(WriteMostly, &flags)) | |
2697 | len += sprintf(page+len, "write_mostly%s", sep); | |
758bfc8a | 2698 | if (test_bit(Blocked, &flags) || |
52c64152 | 2699 | (rdev->badblocks.unacked_exist |
35b785f7 TM |
2700 | && !test_bit(Faulty, &flags))) |
2701 | len += sprintf(page+len, "blocked%s", sep); | |
758bfc8a | 2702 | if (!test_bit(Faulty, &flags) && |
f2076e7d | 2703 | !test_bit(Journal, &flags) && |
35b785f7 TM |
2704 | !test_bit(In_sync, &flags)) |
2705 | len += sprintf(page+len, "spare%s", sep); | |
2706 | if (test_bit(WriteErrorSeen, &flags)) | |
2707 | len += sprintf(page+len, "write_error%s", sep); | |
2708 | if (test_bit(WantReplacement, &flags)) | |
2709 | len += sprintf(page+len, "want_replacement%s", sep); | |
2710 | if (test_bit(Replacement, &flags)) | |
2711 | len += sprintf(page+len, "replacement%s", sep); | |
2712 | if (test_bit(ExternalBbl, &flags)) | |
2713 | len += sprintf(page+len, "external_bbl%s", sep); | |
688834e6 N |
2714 | if (test_bit(FailFast, &flags)) |
2715 | len += sprintf(page+len, "failfast%s", sep); | |
35b785f7 TM |
2716 | |
2717 | if (len) | |
2718 | len -= strlen(sep); | |
2d78f8c4 | 2719 | |
86e6ffdd N |
2720 | return len+sprintf(page+len, "\n"); |
2721 | } | |
2722 | ||
45dc2de1 | 2723 | static ssize_t |
3cb03002 | 2724 | state_store(struct md_rdev *rdev, const char *buf, size_t len) |
45dc2de1 N |
2725 | { |
2726 | /* can write | |
de393cde | 2727 | * faulty - simulates an error |
45dc2de1 | 2728 | * remove - disconnects the device |
f655675b N |
2729 | * writemostly - sets write_mostly |
2730 | * -writemostly - clears write_mostly | |
de393cde N |
2731 | * blocked - sets the Blocked flags |
2732 | * -blocked - clears the Blocked and possibly simulates an error | |
6d56e278 | 2733 | * insync - sets Insync providing device isn't active |
f466722c N |
2734 | * -insync - clear Insync for a device with a slot assigned, |
2735 | * so that it gets rebuilt based on bitmap | |
d7a9d443 N |
2736 | * write_error - sets WriteErrorSeen |
2737 | * -write_error - clears WriteErrorSeen | |
688834e6 | 2738 | * {,-}failfast - set/clear FailFast |
45dc2de1 N |
2739 | */ |
2740 | int err = -EINVAL; | |
2741 | if (cmd_match(buf, "faulty") && rdev->mddev->pers) { | |
2742 | md_error(rdev->mddev, rdev); | |
5ef56c8f N |
2743 | if (test_bit(Faulty, &rdev->flags)) |
2744 | err = 0; | |
2745 | else | |
2746 | err = -EBUSY; | |
45dc2de1 | 2747 | } else if (cmd_match(buf, "remove")) { |
5d881783 SL |
2748 | if (rdev->mddev->pers) { |
2749 | clear_bit(Blocked, &rdev->flags); | |
2750 | remove_and_add_spares(rdev->mddev, rdev); | |
2751 | } | |
45dc2de1 N |
2752 | if (rdev->raid_disk >= 0) |
2753 | err = -EBUSY; | |
2754 | else { | |
fd01b88c | 2755 | struct mddev *mddev = rdev->mddev; |
45dc2de1 | 2756 | err = 0; |
a9720903 GJ |
2757 | if (mddev_is_clustered(mddev)) |
2758 | err = md_cluster_ops->remove_disk(mddev, rdev); | |
2759 | ||
2760 | if (err == 0) { | |
2761 | md_kick_rdev_from_array(rdev); | |
060b0689 | 2762 | if (mddev->pers) { |
2953079c | 2763 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
2764 | md_wakeup_thread(mddev->thread); |
2765 | } | |
a9720903 GJ |
2766 | md_new_event(mddev); |
2767 | } | |
45dc2de1 | 2768 | } |
f655675b N |
2769 | } else if (cmd_match(buf, "writemostly")) { |
2770 | set_bit(WriteMostly, &rdev->flags); | |
2771 | err = 0; | |
2772 | } else if (cmd_match(buf, "-writemostly")) { | |
2773 | clear_bit(WriteMostly, &rdev->flags); | |
6bfe0b49 DW |
2774 | err = 0; |
2775 | } else if (cmd_match(buf, "blocked")) { | |
2776 | set_bit(Blocked, &rdev->flags); | |
2777 | err = 0; | |
2778 | } else if (cmd_match(buf, "-blocked")) { | |
de393cde | 2779 | if (!test_bit(Faulty, &rdev->flags) && |
dcbcb486 | 2780 | !test_bit(ExternalBbl, &rdev->flags) && |
7da64a0a | 2781 | rdev->badblocks.unacked_exist) { |
de393cde N |
2782 | /* metadata handler doesn't understand badblocks, |
2783 | * so we need to fail the device | |
2784 | */ | |
2785 | md_error(rdev->mddev, rdev); | |
2786 | } | |
6bfe0b49 | 2787 | clear_bit(Blocked, &rdev->flags); |
de393cde | 2788 | clear_bit(BlockedBadBlocks, &rdev->flags); |
6bfe0b49 DW |
2789 | wake_up(&rdev->blocked_wait); |
2790 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
2791 | md_wakeup_thread(rdev->mddev->thread); | |
2792 | ||
6d56e278 N |
2793 | err = 0; |
2794 | } else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) { | |
2795 | set_bit(In_sync, &rdev->flags); | |
f655675b | 2796 | err = 0; |
688834e6 N |
2797 | } else if (cmd_match(buf, "failfast")) { |
2798 | set_bit(FailFast, &rdev->flags); | |
2799 | err = 0; | |
2800 | } else if (cmd_match(buf, "-failfast")) { | |
2801 | clear_bit(FailFast, &rdev->flags); | |
2802 | err = 0; | |
f2076e7d SL |
2803 | } else if (cmd_match(buf, "-insync") && rdev->raid_disk >= 0 && |
2804 | !test_bit(Journal, &rdev->flags)) { | |
e1960f8c N |
2805 | if (rdev->mddev->pers == NULL) { |
2806 | clear_bit(In_sync, &rdev->flags); | |
2807 | rdev->saved_raid_disk = rdev->raid_disk; | |
2808 | rdev->raid_disk = -1; | |
2809 | err = 0; | |
2810 | } | |
d7a9d443 N |
2811 | } else if (cmd_match(buf, "write_error")) { |
2812 | set_bit(WriteErrorSeen, &rdev->flags); | |
2813 | err = 0; | |
2814 | } else if (cmd_match(buf, "-write_error")) { | |
2815 | clear_bit(WriteErrorSeen, &rdev->flags); | |
2816 | err = 0; | |
2d78f8c4 N |
2817 | } else if (cmd_match(buf, "want_replacement")) { |
2818 | /* Any non-spare device that is not a replacement can | |
2819 | * become want_replacement at any time, but we then need to | |
2820 | * check if recovery is needed. | |
2821 | */ | |
2822 | if (rdev->raid_disk >= 0 && | |
f2076e7d | 2823 | !test_bit(Journal, &rdev->flags) && |
2d78f8c4 N |
2824 | !test_bit(Replacement, &rdev->flags)) |
2825 | set_bit(WantReplacement, &rdev->flags); | |
2826 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
2827 | md_wakeup_thread(rdev->mddev->thread); | |
2828 | err = 0; | |
2829 | } else if (cmd_match(buf, "-want_replacement")) { | |
2830 | /* Clearing 'want_replacement' is always allowed. | |
2831 | * Once replacements starts it is too late though. | |
2832 | */ | |
2833 | err = 0; | |
2834 | clear_bit(WantReplacement, &rdev->flags); | |
2835 | } else if (cmd_match(buf, "replacement")) { | |
2836 | /* Can only set a device as a replacement when array has not | |
2837 | * yet been started. Once running, replacement is automatic | |
2838 | * from spares, or by assigning 'slot'. | |
2839 | */ | |
2840 | if (rdev->mddev->pers) | |
2841 | err = -EBUSY; | |
2842 | else { | |
2843 | set_bit(Replacement, &rdev->flags); | |
2844 | err = 0; | |
2845 | } | |
2846 | } else if (cmd_match(buf, "-replacement")) { | |
2847 | /* Similarly, can only clear Replacement before start */ | |
2848 | if (rdev->mddev->pers) | |
2849 | err = -EBUSY; | |
2850 | else { | |
2851 | clear_bit(Replacement, &rdev->flags); | |
2852 | err = 0; | |
2853 | } | |
a6da4ef8 | 2854 | } else if (cmd_match(buf, "re-add")) { |
09e00dcd N |
2855 | if (test_bit(Faulty, &rdev->flags) && (rdev->raid_disk == -1) && |
2856 | rdev->saved_raid_disk >= 0) { | |
97f6cd39 GR |
2857 | /* clear_bit is performed _after_ all the devices |
2858 | * have their local Faulty bit cleared. If any writes | |
2859 | * happen in the meantime in the local node, they | |
2860 | * will land in the local bitmap, which will be synced | |
2861 | * by this node eventually | |
2862 | */ | |
2863 | if (!mddev_is_clustered(rdev->mddev) || | |
2864 | (err = md_cluster_ops->gather_bitmaps(rdev)) == 0) { | |
2865 | clear_bit(Faulty, &rdev->flags); | |
2866 | err = add_bound_rdev(rdev); | |
2867 | } | |
a6da4ef8 GR |
2868 | } else |
2869 | err = -EBUSY; | |
35b785f7 TM |
2870 | } else if (cmd_match(buf, "external_bbl") && (rdev->mddev->external)) { |
2871 | set_bit(ExternalBbl, &rdev->flags); | |
2872 | rdev->badblocks.shift = 0; | |
2873 | err = 0; | |
2874 | } else if (cmd_match(buf, "-external_bbl") && (rdev->mddev->external)) { | |
2875 | clear_bit(ExternalBbl, &rdev->flags); | |
2876 | err = 0; | |
45dc2de1 | 2877 | } |
00bcb4ac N |
2878 | if (!err) |
2879 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
45dc2de1 N |
2880 | return err ? err : len; |
2881 | } | |
80ca3a44 | 2882 | static struct rdev_sysfs_entry rdev_state = |
750f199e | 2883 | __ATTR_PREALLOC(state, S_IRUGO|S_IWUSR, state_show, state_store); |
86e6ffdd | 2884 | |
4dbcdc75 | 2885 | static ssize_t |
3cb03002 | 2886 | errors_show(struct md_rdev *rdev, char *page) |
4dbcdc75 N |
2887 | { |
2888 | return sprintf(page, "%d\n", atomic_read(&rdev->corrected_errors)); | |
2889 | } | |
2890 | ||
2891 | static ssize_t | |
3cb03002 | 2892 | errors_store(struct md_rdev *rdev, const char *buf, size_t len) |
4dbcdc75 | 2893 | { |
4c9309c0 AD |
2894 | unsigned int n; |
2895 | int rv; | |
2896 | ||
2897 | rv = kstrtouint(buf, 10, &n); | |
2898 | if (rv < 0) | |
2899 | return rv; | |
2900 | atomic_set(&rdev->corrected_errors, n); | |
2901 | return len; | |
4dbcdc75 N |
2902 | } |
2903 | static struct rdev_sysfs_entry rdev_errors = | |
80ca3a44 | 2904 | __ATTR(errors, S_IRUGO|S_IWUSR, errors_show, errors_store); |
4dbcdc75 | 2905 | |
014236d2 | 2906 | static ssize_t |
3cb03002 | 2907 | slot_show(struct md_rdev *rdev, char *page) |
014236d2 | 2908 | { |
f2076e7d SL |
2909 | if (test_bit(Journal, &rdev->flags)) |
2910 | return sprintf(page, "journal\n"); | |
2911 | else if (rdev->raid_disk < 0) | |
014236d2 N |
2912 | return sprintf(page, "none\n"); |
2913 | else | |
2914 | return sprintf(page, "%d\n", rdev->raid_disk); | |
2915 | } | |
2916 | ||
2917 | static ssize_t | |
3cb03002 | 2918 | slot_store(struct md_rdev *rdev, const char *buf, size_t len) |
014236d2 | 2919 | { |
4c9309c0 | 2920 | int slot; |
c303da6d | 2921 | int err; |
4c9309c0 | 2922 | |
f2076e7d SL |
2923 | if (test_bit(Journal, &rdev->flags)) |
2924 | return -EBUSY; | |
014236d2 N |
2925 | if (strncmp(buf, "none", 4)==0) |
2926 | slot = -1; | |
4c9309c0 AD |
2927 | else { |
2928 | err = kstrtouint(buf, 10, (unsigned int *)&slot); | |
2929 | if (err < 0) | |
2930 | return err; | |
2931 | } | |
6c2fce2e | 2932 | if (rdev->mddev->pers && slot == -1) { |
c303da6d N |
2933 | /* Setting 'slot' on an active array requires also |
2934 | * updating the 'rd%d' link, and communicating | |
2935 | * with the personality with ->hot_*_disk. | |
2936 | * For now we only support removing | |
2937 | * failed/spare devices. This normally happens automatically, | |
2938 | * but not when the metadata is externally managed. | |
2939 | */ | |
c303da6d N |
2940 | if (rdev->raid_disk == -1) |
2941 | return -EEXIST; | |
2942 | /* personality does all needed checks */ | |
01393f3d | 2943 | if (rdev->mddev->pers->hot_remove_disk == NULL) |
c303da6d | 2944 | return -EINVAL; |
746d3207 N |
2945 | clear_bit(Blocked, &rdev->flags); |
2946 | remove_and_add_spares(rdev->mddev, rdev); | |
2947 | if (rdev->raid_disk >= 0) | |
2948 | return -EBUSY; | |
c303da6d N |
2949 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); |
2950 | md_wakeup_thread(rdev->mddev->thread); | |
6c2fce2e | 2951 | } else if (rdev->mddev->pers) { |
6c2fce2e | 2952 | /* Activating a spare .. or possibly reactivating |
6d56e278 | 2953 | * if we ever get bitmaps working here. |
6c2fce2e | 2954 | */ |
cb01c549 | 2955 | int err; |
6c2fce2e NB |
2956 | |
2957 | if (rdev->raid_disk != -1) | |
2958 | return -EBUSY; | |
2959 | ||
c6751b2b N |
2960 | if (test_bit(MD_RECOVERY_RUNNING, &rdev->mddev->recovery)) |
2961 | return -EBUSY; | |
2962 | ||
6c2fce2e NB |
2963 | if (rdev->mddev->pers->hot_add_disk == NULL) |
2964 | return -EINVAL; | |
2965 | ||
ba1b41b6 N |
2966 | if (slot >= rdev->mddev->raid_disks && |
2967 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
2968 | return -ENOSPC; | |
2969 | ||
6c2fce2e NB |
2970 | rdev->raid_disk = slot; |
2971 | if (test_bit(In_sync, &rdev->flags)) | |
2972 | rdev->saved_raid_disk = slot; | |
2973 | else | |
2974 | rdev->saved_raid_disk = -1; | |
d30519fc | 2975 | clear_bit(In_sync, &rdev->flags); |
8313b8e5 | 2976 | clear_bit(Bitmap_sync, &rdev->flags); |
cb01c549 GR |
2977 | err = rdev->mddev->pers-> |
2978 | hot_add_disk(rdev->mddev, rdev); | |
2979 | if (err) { | |
2980 | rdev->raid_disk = -1; | |
2981 | return err; | |
2982 | } else | |
2983 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2984 | if (sysfs_link_rdev(rdev->mddev, rdev)) | |
2985 | /* failure here is OK */; | |
6c2fce2e | 2986 | /* don't wakeup anyone, leave that to userspace. */ |
c303da6d | 2987 | } else { |
ba1b41b6 N |
2988 | if (slot >= rdev->mddev->raid_disks && |
2989 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
c303da6d N |
2990 | return -ENOSPC; |
2991 | rdev->raid_disk = slot; | |
2992 | /* assume it is working */ | |
c5d79adb N |
2993 | clear_bit(Faulty, &rdev->flags); |
2994 | clear_bit(WriteMostly, &rdev->flags); | |
c303da6d | 2995 | set_bit(In_sync, &rdev->flags); |
00bcb4ac | 2996 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
c303da6d | 2997 | } |
014236d2 N |
2998 | return len; |
2999 | } | |
3000 | ||
014236d2 | 3001 | static struct rdev_sysfs_entry rdev_slot = |
80ca3a44 | 3002 | __ATTR(slot, S_IRUGO|S_IWUSR, slot_show, slot_store); |
014236d2 | 3003 | |
93c8cad0 | 3004 | static ssize_t |
3cb03002 | 3005 | offset_show(struct md_rdev *rdev, char *page) |
93c8cad0 | 3006 | { |
6961ece4 | 3007 | return sprintf(page, "%llu\n", (unsigned long long)rdev->data_offset); |
93c8cad0 N |
3008 | } |
3009 | ||
3010 | static ssize_t | |
3cb03002 | 3011 | offset_store(struct md_rdev *rdev, const char *buf, size_t len) |
93c8cad0 | 3012 | { |
c6563a8c | 3013 | unsigned long long offset; |
b29bebd6 | 3014 | if (kstrtoull(buf, 10, &offset) < 0) |
93c8cad0 | 3015 | return -EINVAL; |
8ed0a521 | 3016 | if (rdev->mddev->pers && rdev->raid_disk >= 0) |
93c8cad0 | 3017 | return -EBUSY; |
dd8ac336 | 3018 | if (rdev->sectors && rdev->mddev->external) |
c5d79adb N |
3019 | /* Must set offset before size, so overlap checks |
3020 | * can be sane */ | |
3021 | return -EBUSY; | |
93c8cad0 | 3022 | rdev->data_offset = offset; |
25f7fd47 | 3023 | rdev->new_data_offset = offset; |
93c8cad0 N |
3024 | return len; |
3025 | } | |
3026 | ||
3027 | static struct rdev_sysfs_entry rdev_offset = | |
80ca3a44 | 3028 | __ATTR(offset, S_IRUGO|S_IWUSR, offset_show, offset_store); |
93c8cad0 | 3029 | |
c6563a8c N |
3030 | static ssize_t new_offset_show(struct md_rdev *rdev, char *page) |
3031 | { | |
3032 | return sprintf(page, "%llu\n", | |
3033 | (unsigned long long)rdev->new_data_offset); | |
3034 | } | |
3035 | ||
3036 | static ssize_t new_offset_store(struct md_rdev *rdev, | |
3037 | const char *buf, size_t len) | |
3038 | { | |
3039 | unsigned long long new_offset; | |
3040 | struct mddev *mddev = rdev->mddev; | |
3041 | ||
b29bebd6 | 3042 | if (kstrtoull(buf, 10, &new_offset) < 0) |
c6563a8c N |
3043 | return -EINVAL; |
3044 | ||
f851b60d N |
3045 | if (mddev->sync_thread || |
3046 | test_bit(MD_RECOVERY_RUNNING,&mddev->recovery)) | |
c6563a8c N |
3047 | return -EBUSY; |
3048 | if (new_offset == rdev->data_offset) | |
3049 | /* reset is always permitted */ | |
3050 | ; | |
3051 | else if (new_offset > rdev->data_offset) { | |
3052 | /* must not push array size beyond rdev_sectors */ | |
3053 | if (new_offset - rdev->data_offset | |
3054 | + mddev->dev_sectors > rdev->sectors) | |
3055 | return -E2BIG; | |
3056 | } | |
3057 | /* Metadata worries about other space details. */ | |
3058 | ||
3059 | /* decreasing the offset is inconsistent with a backwards | |
3060 | * reshape. | |
3061 | */ | |
3062 | if (new_offset < rdev->data_offset && | |
3063 | mddev->reshape_backwards) | |
3064 | return -EINVAL; | |
3065 | /* Increasing offset is inconsistent with forwards | |
3066 | * reshape. reshape_direction should be set to | |
3067 | * 'backwards' first. | |
3068 | */ | |
3069 | if (new_offset > rdev->data_offset && | |
3070 | !mddev->reshape_backwards) | |
3071 | return -EINVAL; | |
3072 | ||
3073 | if (mddev->pers && mddev->persistent && | |
3074 | !super_types[mddev->major_version] | |
3075 | .allow_new_offset(rdev, new_offset)) | |
3076 | return -E2BIG; | |
3077 | rdev->new_data_offset = new_offset; | |
3078 | if (new_offset > rdev->data_offset) | |
3079 | mddev->reshape_backwards = 1; | |
3080 | else if (new_offset < rdev->data_offset) | |
3081 | mddev->reshape_backwards = 0; | |
3082 | ||
3083 | return len; | |
3084 | } | |
3085 | static struct rdev_sysfs_entry rdev_new_offset = | |
3086 | __ATTR(new_offset, S_IRUGO|S_IWUSR, new_offset_show, new_offset_store); | |
3087 | ||
83303b61 | 3088 | static ssize_t |
3cb03002 | 3089 | rdev_size_show(struct md_rdev *rdev, char *page) |
83303b61 | 3090 | { |
dd8ac336 | 3091 | return sprintf(page, "%llu\n", (unsigned long long)rdev->sectors / 2); |
83303b61 N |
3092 | } |
3093 | ||
c5d79adb N |
3094 | static int overlaps(sector_t s1, sector_t l1, sector_t s2, sector_t l2) |
3095 | { | |
3096 | /* check if two start/length pairs overlap */ | |
3097 | if (s1+l1 <= s2) | |
3098 | return 0; | |
3099 | if (s2+l2 <= s1) | |
3100 | return 0; | |
3101 | return 1; | |
3102 | } | |
3103 | ||
b522adcd DW |
3104 | static int strict_blocks_to_sectors(const char *buf, sector_t *sectors) |
3105 | { | |
3106 | unsigned long long blocks; | |
3107 | sector_t new; | |
3108 | ||
b29bebd6 | 3109 | if (kstrtoull(buf, 10, &blocks) < 0) |
b522adcd DW |
3110 | return -EINVAL; |
3111 | ||
3112 | if (blocks & 1ULL << (8 * sizeof(blocks) - 1)) | |
3113 | return -EINVAL; /* sector conversion overflow */ | |
3114 | ||
3115 | new = blocks * 2; | |
3116 | if (new != blocks * 2) | |
3117 | return -EINVAL; /* unsigned long long to sector_t overflow */ | |
3118 | ||
3119 | *sectors = new; | |
3120 | return 0; | |
3121 | } | |
3122 | ||
83303b61 | 3123 | static ssize_t |
3cb03002 | 3124 | rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len) |
83303b61 | 3125 | { |
fd01b88c | 3126 | struct mddev *my_mddev = rdev->mddev; |
dd8ac336 | 3127 | sector_t oldsectors = rdev->sectors; |
b522adcd | 3128 | sector_t sectors; |
27c529bb | 3129 | |
f2076e7d SL |
3130 | if (test_bit(Journal, &rdev->flags)) |
3131 | return -EBUSY; | |
b522adcd | 3132 | if (strict_blocks_to_sectors(buf, §ors) < 0) |
d7027458 | 3133 | return -EINVAL; |
c6563a8c N |
3134 | if (rdev->data_offset != rdev->new_data_offset) |
3135 | return -EINVAL; /* too confusing */ | |
0cd17fec | 3136 | if (my_mddev->pers && rdev->raid_disk >= 0) { |
d7027458 | 3137 | if (my_mddev->persistent) { |
dd8ac336 AN |
3138 | sectors = super_types[my_mddev->major_version]. |
3139 | rdev_size_change(rdev, sectors); | |
3140 | if (!sectors) | |
0cd17fec | 3141 | return -EBUSY; |
dd8ac336 | 3142 | } else if (!sectors) |
77304d2a | 3143 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9) - |
dd8ac336 | 3144 | rdev->data_offset; |
a6468539 N |
3145 | if (!my_mddev->pers->resize) |
3146 | /* Cannot change size for RAID0 or Linear etc */ | |
3147 | return -EINVAL; | |
0cd17fec | 3148 | } |
dd8ac336 | 3149 | if (sectors < my_mddev->dev_sectors) |
7d3c6f87 | 3150 | return -EINVAL; /* component must fit device */ |
0cd17fec | 3151 | |
dd8ac336 AN |
3152 | rdev->sectors = sectors; |
3153 | if (sectors > oldsectors && my_mddev->external) { | |
8b1afc3d N |
3154 | /* Need to check that all other rdevs with the same |
3155 | * ->bdev do not overlap. 'rcu' is sufficient to walk | |
3156 | * the rdev lists safely. | |
3157 | * This check does not provide a hard guarantee, it | |
3158 | * just helps avoid dangerous mistakes. | |
c5d79adb | 3159 | */ |
fd01b88c | 3160 | struct mddev *mddev; |
c5d79adb | 3161 | int overlap = 0; |
159ec1fc | 3162 | struct list_head *tmp; |
c5d79adb | 3163 | |
8b1afc3d | 3164 | rcu_read_lock(); |
29ac4aa3 | 3165 | for_each_mddev(mddev, tmp) { |
3cb03002 | 3166 | struct md_rdev *rdev2; |
c5d79adb | 3167 | |
dafb20fa | 3168 | rdev_for_each(rdev2, mddev) |
f21e9ff7 N |
3169 | if (rdev->bdev == rdev2->bdev && |
3170 | rdev != rdev2 && | |
3171 | overlaps(rdev->data_offset, rdev->sectors, | |
3172 | rdev2->data_offset, | |
3173 | rdev2->sectors)) { | |
c5d79adb N |
3174 | overlap = 1; |
3175 | break; | |
3176 | } | |
c5d79adb N |
3177 | if (overlap) { |
3178 | mddev_put(mddev); | |
3179 | break; | |
3180 | } | |
3181 | } | |
8b1afc3d | 3182 | rcu_read_unlock(); |
c5d79adb N |
3183 | if (overlap) { |
3184 | /* Someone else could have slipped in a size | |
3185 | * change here, but doing so is just silly. | |
dd8ac336 | 3186 | * We put oldsectors back because we *know* it is |
c5d79adb N |
3187 | * safe, and trust userspace not to race with |
3188 | * itself | |
3189 | */ | |
dd8ac336 | 3190 | rdev->sectors = oldsectors; |
c5d79adb N |
3191 | return -EBUSY; |
3192 | } | |
3193 | } | |
83303b61 N |
3194 | return len; |
3195 | } | |
3196 | ||
3197 | static struct rdev_sysfs_entry rdev_size = | |
80ca3a44 | 3198 | __ATTR(size, S_IRUGO|S_IWUSR, rdev_size_show, rdev_size_store); |
83303b61 | 3199 | |
3cb03002 | 3200 | static ssize_t recovery_start_show(struct md_rdev *rdev, char *page) |
06e3c817 DW |
3201 | { |
3202 | unsigned long long recovery_start = rdev->recovery_offset; | |
3203 | ||
3204 | if (test_bit(In_sync, &rdev->flags) || | |
3205 | recovery_start == MaxSector) | |
3206 | return sprintf(page, "none\n"); | |
3207 | ||
3208 | return sprintf(page, "%llu\n", recovery_start); | |
3209 | } | |
3210 | ||
3cb03002 | 3211 | static ssize_t recovery_start_store(struct md_rdev *rdev, const char *buf, size_t len) |
06e3c817 DW |
3212 | { |
3213 | unsigned long long recovery_start; | |
3214 | ||
3215 | if (cmd_match(buf, "none")) | |
3216 | recovery_start = MaxSector; | |
b29bebd6 | 3217 | else if (kstrtoull(buf, 10, &recovery_start)) |
06e3c817 DW |
3218 | return -EINVAL; |
3219 | ||
3220 | if (rdev->mddev->pers && | |
3221 | rdev->raid_disk >= 0) | |
3222 | return -EBUSY; | |
3223 | ||
3224 | rdev->recovery_offset = recovery_start; | |
3225 | if (recovery_start == MaxSector) | |
3226 | set_bit(In_sync, &rdev->flags); | |
3227 | else | |
3228 | clear_bit(In_sync, &rdev->flags); | |
3229 | return len; | |
3230 | } | |
3231 | ||
3232 | static struct rdev_sysfs_entry rdev_recovery_start = | |
3233 | __ATTR(recovery_start, S_IRUGO|S_IWUSR, recovery_start_show, recovery_start_store); | |
3234 | ||
fc974ee2 VV |
3235 | /* sysfs access to bad-blocks list. |
3236 | * We present two files. | |
3237 | * 'bad-blocks' lists sector numbers and lengths of ranges that | |
3238 | * are recorded as bad. The list is truncated to fit within | |
3239 | * the one-page limit of sysfs. | |
3240 | * Writing "sector length" to this file adds an acknowledged | |
3241 | * bad block list. | |
3242 | * 'unacknowledged-bad-blocks' lists bad blocks that have not yet | |
3243 | * been acknowledged. Writing to this file adds bad blocks | |
3244 | * without acknowledging them. This is largely for testing. | |
3245 | */ | |
3cb03002 | 3246 | static ssize_t bb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3247 | { |
3248 | return badblocks_show(&rdev->badblocks, page, 0); | |
3249 | } | |
3cb03002 | 3250 | static ssize_t bb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 | 3251 | { |
de393cde N |
3252 | int rv = badblocks_store(&rdev->badblocks, page, len, 0); |
3253 | /* Maybe that ack was all we needed */ | |
3254 | if (test_and_clear_bit(BlockedBadBlocks, &rdev->flags)) | |
3255 | wake_up(&rdev->blocked_wait); | |
3256 | return rv; | |
16c791a5 N |
3257 | } |
3258 | static struct rdev_sysfs_entry rdev_bad_blocks = | |
3259 | __ATTR(bad_blocks, S_IRUGO|S_IWUSR, bb_show, bb_store); | |
3260 | ||
3cb03002 | 3261 | static ssize_t ubb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3262 | { |
3263 | return badblocks_show(&rdev->badblocks, page, 1); | |
3264 | } | |
3cb03002 | 3265 | static ssize_t ubb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 N |
3266 | { |
3267 | return badblocks_store(&rdev->badblocks, page, len, 1); | |
3268 | } | |
3269 | static struct rdev_sysfs_entry rdev_unack_bad_blocks = | |
3270 | __ATTR(unacknowledged_bad_blocks, S_IRUGO|S_IWUSR, ubb_show, ubb_store); | |
3271 | ||
664aed04 AP |
3272 | static ssize_t |
3273 | ppl_sector_show(struct md_rdev *rdev, char *page) | |
3274 | { | |
3275 | return sprintf(page, "%llu\n", (unsigned long long)rdev->ppl.sector); | |
3276 | } | |
3277 | ||
3278 | static ssize_t | |
3279 | ppl_sector_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3280 | { | |
3281 | unsigned long long sector; | |
3282 | ||
3283 | if (kstrtoull(buf, 10, §or) < 0) | |
3284 | return -EINVAL; | |
3285 | if (sector != (sector_t)sector) | |
3286 | return -EINVAL; | |
3287 | ||
3288 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3289 | rdev->raid_disk >= 0) | |
3290 | return -EBUSY; | |
3291 | ||
3292 | if (rdev->mddev->persistent) { | |
3293 | if (rdev->mddev->major_version == 0) | |
3294 | return -EINVAL; | |
3295 | if ((sector > rdev->sb_start && | |
3296 | sector - rdev->sb_start > S16_MAX) || | |
3297 | (sector < rdev->sb_start && | |
3298 | rdev->sb_start - sector > -S16_MIN)) | |
3299 | return -EINVAL; | |
3300 | rdev->ppl.offset = sector - rdev->sb_start; | |
3301 | } else if (!rdev->mddev->external) { | |
3302 | return -EBUSY; | |
3303 | } | |
3304 | rdev->ppl.sector = sector; | |
3305 | return len; | |
3306 | } | |
3307 | ||
3308 | static struct rdev_sysfs_entry rdev_ppl_sector = | |
3309 | __ATTR(ppl_sector, S_IRUGO|S_IWUSR, ppl_sector_show, ppl_sector_store); | |
3310 | ||
3311 | static ssize_t | |
3312 | ppl_size_show(struct md_rdev *rdev, char *page) | |
3313 | { | |
3314 | return sprintf(page, "%u\n", rdev->ppl.size); | |
3315 | } | |
3316 | ||
3317 | static ssize_t | |
3318 | ppl_size_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3319 | { | |
3320 | unsigned int size; | |
3321 | ||
3322 | if (kstrtouint(buf, 10, &size) < 0) | |
3323 | return -EINVAL; | |
3324 | ||
3325 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3326 | rdev->raid_disk >= 0) | |
3327 | return -EBUSY; | |
3328 | ||
3329 | if (rdev->mddev->persistent) { | |
3330 | if (rdev->mddev->major_version == 0) | |
3331 | return -EINVAL; | |
3332 | if (size > U16_MAX) | |
3333 | return -EINVAL; | |
3334 | } else if (!rdev->mddev->external) { | |
3335 | return -EBUSY; | |
3336 | } | |
3337 | rdev->ppl.size = size; | |
3338 | return len; | |
3339 | } | |
3340 | ||
3341 | static struct rdev_sysfs_entry rdev_ppl_size = | |
3342 | __ATTR(ppl_size, S_IRUGO|S_IWUSR, ppl_size_show, ppl_size_store); | |
3343 | ||
86e6ffdd N |
3344 | static struct attribute *rdev_default_attrs[] = { |
3345 | &rdev_state.attr, | |
4dbcdc75 | 3346 | &rdev_errors.attr, |
014236d2 | 3347 | &rdev_slot.attr, |
93c8cad0 | 3348 | &rdev_offset.attr, |
c6563a8c | 3349 | &rdev_new_offset.attr, |
83303b61 | 3350 | &rdev_size.attr, |
06e3c817 | 3351 | &rdev_recovery_start.attr, |
16c791a5 N |
3352 | &rdev_bad_blocks.attr, |
3353 | &rdev_unack_bad_blocks.attr, | |
664aed04 AP |
3354 | &rdev_ppl_sector.attr, |
3355 | &rdev_ppl_size.attr, | |
86e6ffdd N |
3356 | NULL, |
3357 | }; | |
3358 | static ssize_t | |
3359 | rdev_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
3360 | { | |
3361 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3362 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
86e6ffdd N |
3363 | |
3364 | if (!entry->show) | |
3365 | return -EIO; | |
758bfc8a N |
3366 | if (!rdev->mddev) |
3367 | return -EBUSY; | |
3368 | return entry->show(rdev, page); | |
86e6ffdd N |
3369 | } |
3370 | ||
3371 | static ssize_t | |
3372 | rdev_attr_store(struct kobject *kobj, struct attribute *attr, | |
3373 | const char *page, size_t length) | |
3374 | { | |
3375 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3376 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
27c529bb | 3377 | ssize_t rv; |
fd01b88c | 3378 | struct mddev *mddev = rdev->mddev; |
86e6ffdd N |
3379 | |
3380 | if (!entry->store) | |
3381 | return -EIO; | |
67463acb N |
3382 | if (!capable(CAP_SYS_ADMIN)) |
3383 | return -EACCES; | |
27c529bb | 3384 | rv = mddev ? mddev_lock(mddev): -EBUSY; |
ca388059 | 3385 | if (!rv) { |
27c529bb N |
3386 | if (rdev->mddev == NULL) |
3387 | rv = -EBUSY; | |
3388 | else | |
3389 | rv = entry->store(rdev, page, length); | |
6a51830e | 3390 | mddev_unlock(mddev); |
ca388059 N |
3391 | } |
3392 | return rv; | |
86e6ffdd N |
3393 | } |
3394 | ||
3395 | static void rdev_free(struct kobject *ko) | |
3396 | { | |
3cb03002 | 3397 | struct md_rdev *rdev = container_of(ko, struct md_rdev, kobj); |
86e6ffdd N |
3398 | kfree(rdev); |
3399 | } | |
52cf25d0 | 3400 | static const struct sysfs_ops rdev_sysfs_ops = { |
86e6ffdd N |
3401 | .show = rdev_attr_show, |
3402 | .store = rdev_attr_store, | |
3403 | }; | |
3404 | static struct kobj_type rdev_ktype = { | |
3405 | .release = rdev_free, | |
3406 | .sysfs_ops = &rdev_sysfs_ops, | |
3407 | .default_attrs = rdev_default_attrs, | |
3408 | }; | |
3409 | ||
3cb03002 | 3410 | int md_rdev_init(struct md_rdev *rdev) |
e8bb9a83 N |
3411 | { |
3412 | rdev->desc_nr = -1; | |
3413 | rdev->saved_raid_disk = -1; | |
3414 | rdev->raid_disk = -1; | |
3415 | rdev->flags = 0; | |
3416 | rdev->data_offset = 0; | |
c6563a8c | 3417 | rdev->new_data_offset = 0; |
e8bb9a83 | 3418 | rdev->sb_events = 0; |
0e3ef49e | 3419 | rdev->last_read_error = 0; |
2699b672 N |
3420 | rdev->sb_loaded = 0; |
3421 | rdev->bb_page = NULL; | |
e8bb9a83 N |
3422 | atomic_set(&rdev->nr_pending, 0); |
3423 | atomic_set(&rdev->read_errors, 0); | |
3424 | atomic_set(&rdev->corrected_errors, 0); | |
3425 | ||
3426 | INIT_LIST_HEAD(&rdev->same_set); | |
3427 | init_waitqueue_head(&rdev->blocked_wait); | |
2230dfe4 N |
3428 | |
3429 | /* Add space to store bad block list. | |
3430 | * This reserves the space even on arrays where it cannot | |
3431 | * be used - I wonder if that matters | |
3432 | */ | |
fc974ee2 | 3433 | return badblocks_init(&rdev->badblocks, 0); |
e8bb9a83 N |
3434 | } |
3435 | EXPORT_SYMBOL_GPL(md_rdev_init); | |
1da177e4 LT |
3436 | /* |
3437 | * Import a device. If 'super_format' >= 0, then sanity check the superblock | |
3438 | * | |
3439 | * mark the device faulty if: | |
3440 | * | |
3441 | * - the device is nonexistent (zero size) | |
3442 | * - the device has no valid superblock | |
3443 | * | |
3444 | * a faulty rdev _never_ has rdev->sb set. | |
3445 | */ | |
3cb03002 | 3446 | static struct md_rdev *md_import_device(dev_t newdev, int super_format, int super_minor) |
1da177e4 LT |
3447 | { |
3448 | char b[BDEVNAME_SIZE]; | |
3449 | int err; | |
3cb03002 | 3450 | struct md_rdev *rdev; |
1da177e4 LT |
3451 | sector_t size; |
3452 | ||
9ffae0cf | 3453 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
9d48739e | 3454 | if (!rdev) |
1da177e4 | 3455 | return ERR_PTR(-ENOMEM); |
1da177e4 | 3456 | |
2230dfe4 N |
3457 | err = md_rdev_init(rdev); |
3458 | if (err) | |
3459 | goto abort_free; | |
3460 | err = alloc_disk_sb(rdev); | |
3461 | if (err) | |
1da177e4 LT |
3462 | goto abort_free; |
3463 | ||
c5d79adb | 3464 | err = lock_rdev(rdev, newdev, super_format == -2); |
1da177e4 LT |
3465 | if (err) |
3466 | goto abort_free; | |
3467 | ||
f9cb074b | 3468 | kobject_init(&rdev->kobj, &rdev_ktype); |
86e6ffdd | 3469 | |
77304d2a | 3470 | size = i_size_read(rdev->bdev->bd_inode) >> BLOCK_SIZE_BITS; |
1da177e4 | 3471 | if (!size) { |
9d48739e | 3472 | pr_warn("md: %s has zero or unknown size, marking faulty!\n", |
1da177e4 LT |
3473 | bdevname(rdev->bdev,b)); |
3474 | err = -EINVAL; | |
3475 | goto abort_free; | |
3476 | } | |
3477 | ||
3478 | if (super_format >= 0) { | |
3479 | err = super_types[super_format]. | |
3480 | load_super(rdev, NULL, super_minor); | |
3481 | if (err == -EINVAL) { | |
9d48739e | 3482 | pr_warn("md: %s does not have a valid v%d.%d superblock, not importing!\n", |
df968c4e | 3483 | bdevname(rdev->bdev,b), |
9d48739e | 3484 | super_format, super_minor); |
1da177e4 LT |
3485 | goto abort_free; |
3486 | } | |
3487 | if (err < 0) { | |
9d48739e | 3488 | pr_warn("md: could not read %s's sb, not importing!\n", |
1da177e4 LT |
3489 | bdevname(rdev->bdev,b)); |
3490 | goto abort_free; | |
3491 | } | |
3492 | } | |
6bfe0b49 | 3493 | |
1da177e4 LT |
3494 | return rdev; |
3495 | ||
3496 | abort_free: | |
2699b672 N |
3497 | if (rdev->bdev) |
3498 | unlock_rdev(rdev); | |
545c8795 | 3499 | md_rdev_clear(rdev); |
1da177e4 LT |
3500 | kfree(rdev); |
3501 | return ERR_PTR(err); | |
3502 | } | |
3503 | ||
3504 | /* | |
3505 | * Check a full RAID array for plausibility | |
3506 | */ | |
3507 | ||
f72ffdd6 | 3508 | static void analyze_sbs(struct mddev *mddev) |
1da177e4 LT |
3509 | { |
3510 | int i; | |
3cb03002 | 3511 | struct md_rdev *rdev, *freshest, *tmp; |
1da177e4 LT |
3512 | char b[BDEVNAME_SIZE]; |
3513 | ||
3514 | freshest = NULL; | |
dafb20fa | 3515 | rdev_for_each_safe(rdev, tmp, mddev) |
1da177e4 LT |
3516 | switch (super_types[mddev->major_version]. |
3517 | load_super(rdev, freshest, mddev->minor_version)) { | |
3518 | case 1: | |
3519 | freshest = rdev; | |
3520 | break; | |
3521 | case 0: | |
3522 | break; | |
3523 | default: | |
9d48739e | 3524 | pr_warn("md: fatal superblock inconsistency in %s -- removing from array\n", |
1da177e4 | 3525 | bdevname(rdev->bdev,b)); |
fb56dfef | 3526 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3527 | } |
3528 | ||
1da177e4 LT |
3529 | super_types[mddev->major_version]. |
3530 | validate_super(mddev, freshest); | |
3531 | ||
3532 | i = 0; | |
dafb20fa | 3533 | rdev_for_each_safe(rdev, tmp, mddev) { |
233fca36 N |
3534 | if (mddev->max_disks && |
3535 | (rdev->desc_nr >= mddev->max_disks || | |
3536 | i > mddev->max_disks)) { | |
9d48739e N |
3537 | pr_warn("md: %s: %s: only %d devices permitted\n", |
3538 | mdname(mddev), bdevname(rdev->bdev, b), | |
3539 | mddev->max_disks); | |
fb56dfef | 3540 | md_kick_rdev_from_array(rdev); |
de01dfad N |
3541 | continue; |
3542 | } | |
1aee41f6 | 3543 | if (rdev != freshest) { |
1da177e4 LT |
3544 | if (super_types[mddev->major_version]. |
3545 | validate_super(mddev, rdev)) { | |
9d48739e | 3546 | pr_warn("md: kicking non-fresh %s from array!\n", |
1da177e4 | 3547 | bdevname(rdev->bdev,b)); |
fb56dfef | 3548 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3549 | continue; |
3550 | } | |
1aee41f6 | 3551 | } |
1da177e4 LT |
3552 | if (mddev->level == LEVEL_MULTIPATH) { |
3553 | rdev->desc_nr = i++; | |
3554 | rdev->raid_disk = rdev->desc_nr; | |
b2d444d7 | 3555 | set_bit(In_sync, &rdev->flags); |
f2076e7d SL |
3556 | } else if (rdev->raid_disk >= |
3557 | (mddev->raid_disks - min(0, mddev->delta_disks)) && | |
3558 | !test_bit(Journal, &rdev->flags)) { | |
a778b73f N |
3559 | rdev->raid_disk = -1; |
3560 | clear_bit(In_sync, &rdev->flags); | |
1da177e4 LT |
3561 | } |
3562 | } | |
1da177e4 LT |
3563 | } |
3564 | ||
72e02075 N |
3565 | /* Read a fixed-point number. |
3566 | * Numbers in sysfs attributes should be in "standard" units where | |
3567 | * possible, so time should be in seconds. | |
f72ffdd6 | 3568 | * However we internally use a a much smaller unit such as |
72e02075 N |
3569 | * milliseconds or jiffies. |
3570 | * This function takes a decimal number with a possible fractional | |
3571 | * component, and produces an integer which is the result of | |
3572 | * multiplying that number by 10^'scale'. | |
3573 | * all without any floating-point arithmetic. | |
3574 | */ | |
3575 | int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale) | |
3576 | { | |
3577 | unsigned long result = 0; | |
3578 | long decimals = -1; | |
3579 | while (isdigit(*cp) || (*cp == '.' && decimals < 0)) { | |
3580 | if (*cp == '.') | |
3581 | decimals = 0; | |
3582 | else if (decimals < scale) { | |
3583 | unsigned int value; | |
3584 | value = *cp - '0'; | |
3585 | result = result * 10 + value; | |
3586 | if (decimals >= 0) | |
3587 | decimals++; | |
3588 | } | |
3589 | cp++; | |
3590 | } | |
3591 | if (*cp == '\n') | |
3592 | cp++; | |
3593 | if (*cp) | |
3594 | return -EINVAL; | |
3595 | if (decimals < 0) | |
3596 | decimals = 0; | |
3597 | while (decimals < scale) { | |
3598 | result *= 10; | |
3599 | decimals ++; | |
3600 | } | |
3601 | *res = result; | |
3602 | return 0; | |
3603 | } | |
3604 | ||
16f17b39 | 3605 | static ssize_t |
fd01b88c | 3606 | safe_delay_show(struct mddev *mddev, char *page) |
16f17b39 N |
3607 | { |
3608 | int msec = (mddev->safemode_delay*1000)/HZ; | |
3609 | return sprintf(page, "%d.%03d\n", msec/1000, msec%1000); | |
3610 | } | |
3611 | static ssize_t | |
fd01b88c | 3612 | safe_delay_store(struct mddev *mddev, const char *cbuf, size_t len) |
16f17b39 | 3613 | { |
16f17b39 | 3614 | unsigned long msec; |
97ce0a7f | 3615 | |
28c1b9fd | 3616 | if (mddev_is_clustered(mddev)) { |
9d48739e | 3617 | pr_warn("md: Safemode is disabled for clustered mode\n"); |
28c1b9fd GR |
3618 | return -EINVAL; |
3619 | } | |
3620 | ||
72e02075 | 3621 | if (strict_strtoul_scaled(cbuf, &msec, 3) < 0) |
16f17b39 | 3622 | return -EINVAL; |
16f17b39 N |
3623 | if (msec == 0) |
3624 | mddev->safemode_delay = 0; | |
3625 | else { | |
19052c0e | 3626 | unsigned long old_delay = mddev->safemode_delay; |
1b30e66f N |
3627 | unsigned long new_delay = (msec*HZ)/1000; |
3628 | ||
3629 | if (new_delay == 0) | |
3630 | new_delay = 1; | |
3631 | mddev->safemode_delay = new_delay; | |
3632 | if (new_delay < old_delay || old_delay == 0) | |
3633 | mod_timer(&mddev->safemode_timer, jiffies+1); | |
16f17b39 N |
3634 | } |
3635 | return len; | |
3636 | } | |
3637 | static struct md_sysfs_entry md_safe_delay = | |
80ca3a44 | 3638 | __ATTR(safe_mode_delay, S_IRUGO|S_IWUSR,safe_delay_show, safe_delay_store); |
16f17b39 | 3639 | |
eae1701f | 3640 | static ssize_t |
fd01b88c | 3641 | level_show(struct mddev *mddev, char *page) |
eae1701f | 3642 | { |
36d091f4 N |
3643 | struct md_personality *p; |
3644 | int ret; | |
3645 | spin_lock(&mddev->lock); | |
3646 | p = mddev->pers; | |
d9d166c2 | 3647 | if (p) |
36d091f4 | 3648 | ret = sprintf(page, "%s\n", p->name); |
d9d166c2 | 3649 | else if (mddev->clevel[0]) |
36d091f4 | 3650 | ret = sprintf(page, "%s\n", mddev->clevel); |
d9d166c2 | 3651 | else if (mddev->level != LEVEL_NONE) |
36d091f4 | 3652 | ret = sprintf(page, "%d\n", mddev->level); |
d9d166c2 | 3653 | else |
36d091f4 N |
3654 | ret = 0; |
3655 | spin_unlock(&mddev->lock); | |
3656 | return ret; | |
eae1701f N |
3657 | } |
3658 | ||
d9d166c2 | 3659 | static ssize_t |
fd01b88c | 3660 | level_store(struct mddev *mddev, const char *buf, size_t len) |
d9d166c2 | 3661 | { |
f2859af6 | 3662 | char clevel[16]; |
6791875e N |
3663 | ssize_t rv; |
3664 | size_t slen = len; | |
db721d32 | 3665 | struct md_personality *pers, *oldpers; |
f2859af6 | 3666 | long level; |
db721d32 | 3667 | void *priv, *oldpriv; |
3cb03002 | 3668 | struct md_rdev *rdev; |
245f46c2 | 3669 | |
6791875e N |
3670 | if (slen == 0 || slen >= sizeof(clevel)) |
3671 | return -EINVAL; | |
3672 | ||
3673 | rv = mddev_lock(mddev); | |
3674 | if (rv) | |
3675 | return rv; | |
3676 | ||
245f46c2 | 3677 | if (mddev->pers == NULL) { |
6791875e N |
3678 | strncpy(mddev->clevel, buf, slen); |
3679 | if (mddev->clevel[slen-1] == '\n') | |
3680 | slen--; | |
3681 | mddev->clevel[slen] = 0; | |
245f46c2 | 3682 | mddev->level = LEVEL_NONE; |
6791875e N |
3683 | rv = len; |
3684 | goto out_unlock; | |
245f46c2 | 3685 | } |
6791875e | 3686 | rv = -EROFS; |
bd8839e0 | 3687 | if (mddev->ro) |
6791875e | 3688 | goto out_unlock; |
245f46c2 N |
3689 | |
3690 | /* request to change the personality. Need to ensure: | |
3691 | * - array is not engaged in resync/recovery/reshape | |
3692 | * - old personality can be suspended | |
3693 | * - new personality will access other array. | |
3694 | */ | |
3695 | ||
6791875e | 3696 | rv = -EBUSY; |
bb4f1e9d | 3697 | if (mddev->sync_thread || |
f851b60d | 3698 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
bb4f1e9d N |
3699 | mddev->reshape_position != MaxSector || |
3700 | mddev->sysfs_active) | |
6791875e | 3701 | goto out_unlock; |
245f46c2 | 3702 | |
6791875e | 3703 | rv = -EINVAL; |
245f46c2 | 3704 | if (!mddev->pers->quiesce) { |
9d48739e N |
3705 | pr_warn("md: %s: %s does not support online personality change\n", |
3706 | mdname(mddev), mddev->pers->name); | |
6791875e | 3707 | goto out_unlock; |
245f46c2 N |
3708 | } |
3709 | ||
3710 | /* Now find the new personality */ | |
6791875e N |
3711 | strncpy(clevel, buf, slen); |
3712 | if (clevel[slen-1] == '\n') | |
3713 | slen--; | |
3714 | clevel[slen] = 0; | |
b29bebd6 | 3715 | if (kstrtol(clevel, 10, &level)) |
f2859af6 | 3716 | level = LEVEL_NONE; |
245f46c2 | 3717 | |
f2859af6 DW |
3718 | if (request_module("md-%s", clevel) != 0) |
3719 | request_module("md-level-%s", clevel); | |
245f46c2 | 3720 | spin_lock(&pers_lock); |
f2859af6 | 3721 | pers = find_pers(level, clevel); |
245f46c2 N |
3722 | if (!pers || !try_module_get(pers->owner)) { |
3723 | spin_unlock(&pers_lock); | |
9d48739e | 3724 | pr_warn("md: personality %s not loaded\n", clevel); |
6791875e N |
3725 | rv = -EINVAL; |
3726 | goto out_unlock; | |
245f46c2 N |
3727 | } |
3728 | spin_unlock(&pers_lock); | |
3729 | ||
3730 | if (pers == mddev->pers) { | |
3731 | /* Nothing to do! */ | |
3732 | module_put(pers->owner); | |
6791875e N |
3733 | rv = len; |
3734 | goto out_unlock; | |
245f46c2 N |
3735 | } |
3736 | if (!pers->takeover) { | |
3737 | module_put(pers->owner); | |
9d48739e N |
3738 | pr_warn("md: %s: %s does not support personality takeover\n", |
3739 | mdname(mddev), clevel); | |
6791875e N |
3740 | rv = -EINVAL; |
3741 | goto out_unlock; | |
245f46c2 N |
3742 | } |
3743 | ||
dafb20fa | 3744 | rdev_for_each(rdev, mddev) |
e93f68a1 N |
3745 | rdev->new_raid_disk = rdev->raid_disk; |
3746 | ||
245f46c2 N |
3747 | /* ->takeover must set new_* and/or delta_disks |
3748 | * if it succeeds, and may set them when it fails. | |
3749 | */ | |
3750 | priv = pers->takeover(mddev); | |
3751 | if (IS_ERR(priv)) { | |
3752 | mddev->new_level = mddev->level; | |
3753 | mddev->new_layout = mddev->layout; | |
664e7c41 | 3754 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
245f46c2 N |
3755 | mddev->raid_disks -= mddev->delta_disks; |
3756 | mddev->delta_disks = 0; | |
2c810cdd | 3757 | mddev->reshape_backwards = 0; |
245f46c2 | 3758 | module_put(pers->owner); |
9d48739e N |
3759 | pr_warn("md: %s: %s would not accept array\n", |
3760 | mdname(mddev), clevel); | |
6791875e N |
3761 | rv = PTR_ERR(priv); |
3762 | goto out_unlock; | |
245f46c2 N |
3763 | } |
3764 | ||
3765 | /* Looks like we have a winner */ | |
3766 | mddev_suspend(mddev); | |
5aa61f42 | 3767 | mddev_detach(mddev); |
36d091f4 N |
3768 | |
3769 | spin_lock(&mddev->lock); | |
db721d32 N |
3770 | oldpers = mddev->pers; |
3771 | oldpriv = mddev->private; | |
3772 | mddev->pers = pers; | |
3773 | mddev->private = priv; | |
3774 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); | |
3775 | mddev->level = mddev->new_level; | |
3776 | mddev->layout = mddev->new_layout; | |
3777 | mddev->chunk_sectors = mddev->new_chunk_sectors; | |
3778 | mddev->delta_disks = 0; | |
3779 | mddev->reshape_backwards = 0; | |
3780 | mddev->degraded = 0; | |
36d091f4 | 3781 | spin_unlock(&mddev->lock); |
db721d32 N |
3782 | |
3783 | if (oldpers->sync_request == NULL && | |
3784 | mddev->external) { | |
3785 | /* We are converting from a no-redundancy array | |
3786 | * to a redundancy array and metadata is managed | |
3787 | * externally so we need to be sure that writes | |
3788 | * won't block due to a need to transition | |
3789 | * clean->dirty | |
3790 | * until external management is started. | |
3791 | */ | |
3792 | mddev->in_sync = 0; | |
3793 | mddev->safemode_delay = 0; | |
3794 | mddev->safemode = 0; | |
3795 | } | |
f72ffdd6 | 3796 | |
db721d32 N |
3797 | oldpers->free(mddev, oldpriv); |
3798 | ||
3799 | if (oldpers->sync_request == NULL && | |
a64c876f N |
3800 | pers->sync_request != NULL) { |
3801 | /* need to add the md_redundancy_group */ | |
3802 | if (sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
3803 | pr_warn("md: cannot register extra attributes for %s\n", |
3804 | mdname(mddev)); | |
388975cc | 3805 | mddev->sysfs_action = sysfs_get_dirent(mddev->kobj.sd, "sync_action"); |
f72ffdd6 | 3806 | } |
db721d32 | 3807 | if (oldpers->sync_request != NULL && |
a64c876f N |
3808 | pers->sync_request == NULL) { |
3809 | /* need to remove the md_redundancy_group */ | |
3810 | if (mddev->to_remove == NULL) | |
3811 | mddev->to_remove = &md_redundancy_group; | |
3812 | } | |
3813 | ||
4cb9da7d AO |
3814 | module_put(oldpers->owner); |
3815 | ||
dafb20fa | 3816 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
3817 | if (rdev->raid_disk < 0) |
3818 | continue; | |
bf2cb0da | 3819 | if (rdev->new_raid_disk >= mddev->raid_disks) |
e93f68a1 N |
3820 | rdev->new_raid_disk = -1; |
3821 | if (rdev->new_raid_disk == rdev->raid_disk) | |
3822 | continue; | |
36fad858 | 3823 | sysfs_unlink_rdev(mddev, rdev); |
e93f68a1 | 3824 | } |
dafb20fa | 3825 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
3826 | if (rdev->raid_disk < 0) |
3827 | continue; | |
3828 | if (rdev->new_raid_disk == rdev->raid_disk) | |
3829 | continue; | |
3830 | rdev->raid_disk = rdev->new_raid_disk; | |
3831 | if (rdev->raid_disk < 0) | |
3a981b03 | 3832 | clear_bit(In_sync, &rdev->flags); |
e93f68a1 | 3833 | else { |
36fad858 | 3834 | if (sysfs_link_rdev(mddev, rdev)) |
9d48739e N |
3835 | pr_warn("md: cannot register rd%d for %s after level change\n", |
3836 | rdev->raid_disk, mdname(mddev)); | |
3a981b03 | 3837 | } |
e93f68a1 N |
3838 | } |
3839 | ||
db721d32 | 3840 | if (pers->sync_request == NULL) { |
9af204cf TM |
3841 | /* this is now an array without redundancy, so |
3842 | * it must always be in_sync | |
3843 | */ | |
3844 | mddev->in_sync = 1; | |
3845 | del_timer_sync(&mddev->safemode_timer); | |
3846 | } | |
02e5f5c0 | 3847 | blk_set_stacking_limits(&mddev->queue->limits); |
245f46c2 | 3848 | pers->run(mddev); |
2953079c | 3849 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
47525e59 | 3850 | mddev_resume(mddev); |
830778a1 N |
3851 | if (!mddev->thread) |
3852 | md_update_sb(mddev, 1); | |
5cac7861 | 3853 | sysfs_notify(&mddev->kobj, NULL, "level"); |
bb7f8d22 | 3854 | md_new_event(mddev); |
6791875e N |
3855 | rv = len; |
3856 | out_unlock: | |
3857 | mddev_unlock(mddev); | |
d9d166c2 N |
3858 | return rv; |
3859 | } | |
3860 | ||
3861 | static struct md_sysfs_entry md_level = | |
80ca3a44 | 3862 | __ATTR(level, S_IRUGO|S_IWUSR, level_show, level_store); |
eae1701f | 3863 | |
d4dbd025 | 3864 | static ssize_t |
fd01b88c | 3865 | layout_show(struct mddev *mddev, char *page) |
d4dbd025 N |
3866 | { |
3867 | /* just a number, not meaningful for all levels */ | |
08a02ecd N |
3868 | if (mddev->reshape_position != MaxSector && |
3869 | mddev->layout != mddev->new_layout) | |
3870 | return sprintf(page, "%d (%d)\n", | |
3871 | mddev->new_layout, mddev->layout); | |
d4dbd025 N |
3872 | return sprintf(page, "%d\n", mddev->layout); |
3873 | } | |
3874 | ||
3875 | static ssize_t | |
fd01b88c | 3876 | layout_store(struct mddev *mddev, const char *buf, size_t len) |
d4dbd025 | 3877 | { |
4c9309c0 | 3878 | unsigned int n; |
6791875e | 3879 | int err; |
d4dbd025 | 3880 | |
4c9309c0 AD |
3881 | err = kstrtouint(buf, 10, &n); |
3882 | if (err < 0) | |
3883 | return err; | |
6791875e N |
3884 | err = mddev_lock(mddev); |
3885 | if (err) | |
3886 | return err; | |
d4dbd025 | 3887 | |
b3546035 | 3888 | if (mddev->pers) { |
50ac168a | 3889 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
3890 | err = -EBUSY; |
3891 | else if (mddev->ro) | |
3892 | err = -EROFS; | |
3893 | else { | |
3894 | mddev->new_layout = n; | |
3895 | err = mddev->pers->check_reshape(mddev); | |
3896 | if (err) | |
3897 | mddev->new_layout = mddev->layout; | |
597a711b | 3898 | } |
b3546035 | 3899 | } else { |
08a02ecd | 3900 | mddev->new_layout = n; |
b3546035 N |
3901 | if (mddev->reshape_position == MaxSector) |
3902 | mddev->layout = n; | |
3903 | } | |
6791875e N |
3904 | mddev_unlock(mddev); |
3905 | return err ?: len; | |
d4dbd025 N |
3906 | } |
3907 | static struct md_sysfs_entry md_layout = | |
80ca3a44 | 3908 | __ATTR(layout, S_IRUGO|S_IWUSR, layout_show, layout_store); |
d4dbd025 | 3909 | |
eae1701f | 3910 | static ssize_t |
fd01b88c | 3911 | raid_disks_show(struct mddev *mddev, char *page) |
eae1701f | 3912 | { |
bb636547 N |
3913 | if (mddev->raid_disks == 0) |
3914 | return 0; | |
08a02ecd N |
3915 | if (mddev->reshape_position != MaxSector && |
3916 | mddev->delta_disks != 0) | |
3917 | return sprintf(page, "%d (%d)\n", mddev->raid_disks, | |
3918 | mddev->raid_disks - mddev->delta_disks); | |
eae1701f N |
3919 | return sprintf(page, "%d\n", mddev->raid_disks); |
3920 | } | |
3921 | ||
fd01b88c | 3922 | static int update_raid_disks(struct mddev *mddev, int raid_disks); |
da943b99 N |
3923 | |
3924 | static ssize_t | |
fd01b88c | 3925 | raid_disks_store(struct mddev *mddev, const char *buf, size_t len) |
da943b99 | 3926 | { |
4c9309c0 | 3927 | unsigned int n; |
6791875e | 3928 | int err; |
da943b99 | 3929 | |
4c9309c0 AD |
3930 | err = kstrtouint(buf, 10, &n); |
3931 | if (err < 0) | |
3932 | return err; | |
da943b99 | 3933 | |
6791875e N |
3934 | err = mddev_lock(mddev); |
3935 | if (err) | |
3936 | return err; | |
da943b99 | 3937 | if (mddev->pers) |
6791875e | 3938 | err = update_raid_disks(mddev, n); |
08a02ecd | 3939 | else if (mddev->reshape_position != MaxSector) { |
c6563a8c | 3940 | struct md_rdev *rdev; |
08a02ecd | 3941 | int olddisks = mddev->raid_disks - mddev->delta_disks; |
c6563a8c | 3942 | |
6791875e | 3943 | err = -EINVAL; |
c6563a8c N |
3944 | rdev_for_each(rdev, mddev) { |
3945 | if (olddisks < n && | |
3946 | rdev->data_offset < rdev->new_data_offset) | |
6791875e | 3947 | goto out_unlock; |
c6563a8c N |
3948 | if (olddisks > n && |
3949 | rdev->data_offset > rdev->new_data_offset) | |
6791875e | 3950 | goto out_unlock; |
c6563a8c | 3951 | } |
6791875e | 3952 | err = 0; |
08a02ecd N |
3953 | mddev->delta_disks = n - olddisks; |
3954 | mddev->raid_disks = n; | |
2c810cdd | 3955 | mddev->reshape_backwards = (mddev->delta_disks < 0); |
08a02ecd | 3956 | } else |
da943b99 | 3957 | mddev->raid_disks = n; |
6791875e N |
3958 | out_unlock: |
3959 | mddev_unlock(mddev); | |
3960 | return err ? err : len; | |
da943b99 N |
3961 | } |
3962 | static struct md_sysfs_entry md_raid_disks = | |
80ca3a44 | 3963 | __ATTR(raid_disks, S_IRUGO|S_IWUSR, raid_disks_show, raid_disks_store); |
eae1701f | 3964 | |
3b34380a | 3965 | static ssize_t |
fd01b88c | 3966 | chunk_size_show(struct mddev *mddev, char *page) |
3b34380a | 3967 | { |
08a02ecd | 3968 | if (mddev->reshape_position != MaxSector && |
664e7c41 AN |
3969 | mddev->chunk_sectors != mddev->new_chunk_sectors) |
3970 | return sprintf(page, "%d (%d)\n", | |
3971 | mddev->new_chunk_sectors << 9, | |
9d8f0363 AN |
3972 | mddev->chunk_sectors << 9); |
3973 | return sprintf(page, "%d\n", mddev->chunk_sectors << 9); | |
3b34380a N |
3974 | } |
3975 | ||
3976 | static ssize_t | |
fd01b88c | 3977 | chunk_size_store(struct mddev *mddev, const char *buf, size_t len) |
3b34380a | 3978 | { |
4c9309c0 | 3979 | unsigned long n; |
6791875e | 3980 | int err; |
3b34380a | 3981 | |
4c9309c0 AD |
3982 | err = kstrtoul(buf, 10, &n); |
3983 | if (err < 0) | |
3984 | return err; | |
3b34380a | 3985 | |
6791875e N |
3986 | err = mddev_lock(mddev); |
3987 | if (err) | |
3988 | return err; | |
b3546035 | 3989 | if (mddev->pers) { |
50ac168a | 3990 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
3991 | err = -EBUSY; |
3992 | else if (mddev->ro) | |
3993 | err = -EROFS; | |
3994 | else { | |
3995 | mddev->new_chunk_sectors = n >> 9; | |
3996 | err = mddev->pers->check_reshape(mddev); | |
3997 | if (err) | |
3998 | mddev->new_chunk_sectors = mddev->chunk_sectors; | |
597a711b | 3999 | } |
b3546035 | 4000 | } else { |
664e7c41 | 4001 | mddev->new_chunk_sectors = n >> 9; |
b3546035 | 4002 | if (mddev->reshape_position == MaxSector) |
9d8f0363 | 4003 | mddev->chunk_sectors = n >> 9; |
b3546035 | 4004 | } |
6791875e N |
4005 | mddev_unlock(mddev); |
4006 | return err ?: len; | |
3b34380a N |
4007 | } |
4008 | static struct md_sysfs_entry md_chunk_size = | |
80ca3a44 | 4009 | __ATTR(chunk_size, S_IRUGO|S_IWUSR, chunk_size_show, chunk_size_store); |
3b34380a | 4010 | |
a94213b1 | 4011 | static ssize_t |
fd01b88c | 4012 | resync_start_show(struct mddev *mddev, char *page) |
a94213b1 | 4013 | { |
d1a7c503 N |
4014 | if (mddev->recovery_cp == MaxSector) |
4015 | return sprintf(page, "none\n"); | |
a94213b1 N |
4016 | return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp); |
4017 | } | |
4018 | ||
4019 | static ssize_t | |
fd01b88c | 4020 | resync_start_store(struct mddev *mddev, const char *buf, size_t len) |
a94213b1 | 4021 | { |
4c9309c0 | 4022 | unsigned long long n; |
6791875e | 4023 | int err; |
4c9309c0 AD |
4024 | |
4025 | if (cmd_match(buf, "none")) | |
4026 | n = MaxSector; | |
4027 | else { | |
4028 | err = kstrtoull(buf, 10, &n); | |
4029 | if (err < 0) | |
4030 | return err; | |
4031 | if (n != (sector_t)n) | |
4032 | return -EINVAL; | |
4033 | } | |
a94213b1 | 4034 | |
6791875e N |
4035 | err = mddev_lock(mddev); |
4036 | if (err) | |
4037 | return err; | |
b098636c | 4038 | if (mddev->pers && !test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) |
6791875e | 4039 | err = -EBUSY; |
a94213b1 | 4040 | |
6791875e N |
4041 | if (!err) { |
4042 | mddev->recovery_cp = n; | |
4043 | if (mddev->pers) | |
2953079c | 4044 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
6791875e N |
4045 | } |
4046 | mddev_unlock(mddev); | |
4047 | return err ?: len; | |
a94213b1 N |
4048 | } |
4049 | static struct md_sysfs_entry md_resync_start = | |
750f199e N |
4050 | __ATTR_PREALLOC(resync_start, S_IRUGO|S_IWUSR, |
4051 | resync_start_show, resync_start_store); | |
a94213b1 | 4052 | |
9e653b63 N |
4053 | /* |
4054 | * The array state can be: | |
4055 | * | |
4056 | * clear | |
4057 | * No devices, no size, no level | |
4058 | * Equivalent to STOP_ARRAY ioctl | |
4059 | * inactive | |
4060 | * May have some settings, but array is not active | |
4061 | * all IO results in error | |
4062 | * When written, doesn't tear down array, but just stops it | |
4063 | * suspended (not supported yet) | |
4064 | * All IO requests will block. The array can be reconfigured. | |
910d8cb3 | 4065 | * Writing this, if accepted, will block until array is quiescent |
9e653b63 N |
4066 | * readonly |
4067 | * no resync can happen. no superblocks get written. | |
4068 | * write requests fail | |
4069 | * read-auto | |
4070 | * like readonly, but behaves like 'clean' on a write request. | |
4071 | * | |
4072 | * clean - no pending writes, but otherwise active. | |
4073 | * When written to inactive array, starts without resync | |
4074 | * If a write request arrives then | |
4075 | * if metadata is known, mark 'dirty' and switch to 'active'. | |
4076 | * if not known, block and switch to write-pending | |
4077 | * If written to an active array that has pending writes, then fails. | |
4078 | * active | |
4079 | * fully active: IO and resync can be happening. | |
4080 | * When written to inactive array, starts with resync | |
4081 | * | |
4082 | * write-pending | |
4083 | * clean, but writes are blocked waiting for 'active' to be written. | |
4084 | * | |
4085 | * active-idle | |
4086 | * like active, but no writes have been seen for a while (100msec). | |
4087 | * | |
4088 | */ | |
4089 | enum array_state { clear, inactive, suspended, readonly, read_auto, clean, active, | |
4090 | write_pending, active_idle, bad_word}; | |
05381954 | 4091 | static char *array_states[] = { |
9e653b63 N |
4092 | "clear", "inactive", "suspended", "readonly", "read-auto", "clean", "active", |
4093 | "write-pending", "active-idle", NULL }; | |
4094 | ||
4095 | static int match_word(const char *word, char **list) | |
4096 | { | |
4097 | int n; | |
4098 | for (n=0; list[n]; n++) | |
4099 | if (cmd_match(word, list[n])) | |
4100 | break; | |
4101 | return n; | |
4102 | } | |
4103 | ||
4104 | static ssize_t | |
fd01b88c | 4105 | array_state_show(struct mddev *mddev, char *page) |
9e653b63 N |
4106 | { |
4107 | enum array_state st = inactive; | |
4108 | ||
4109 | if (mddev->pers) | |
4110 | switch(mddev->ro) { | |
4111 | case 1: | |
4112 | st = readonly; | |
4113 | break; | |
4114 | case 2: | |
4115 | st = read_auto; | |
4116 | break; | |
4117 | case 0: | |
55cc39f3 | 4118 | spin_lock(&mddev->lock); |
2953079c | 4119 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
e691063a | 4120 | st = write_pending; |
16f88949 TM |
4121 | else if (mddev->in_sync) |
4122 | st = clean; | |
9e653b63 N |
4123 | else if (mddev->safemode) |
4124 | st = active_idle; | |
4125 | else | |
4126 | st = active; | |
55cc39f3 | 4127 | spin_unlock(&mddev->lock); |
9e653b63 N |
4128 | } |
4129 | else { | |
4130 | if (list_empty(&mddev->disks) && | |
4131 | mddev->raid_disks == 0 && | |
58c0fed4 | 4132 | mddev->dev_sectors == 0) |
9e653b63 N |
4133 | st = clear; |
4134 | else | |
4135 | st = inactive; | |
4136 | } | |
4137 | return sprintf(page, "%s\n", array_states[st]); | |
4138 | } | |
4139 | ||
f72ffdd6 N |
4140 | static int do_md_stop(struct mddev *mddev, int ro, struct block_device *bdev); |
4141 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev); | |
4142 | static int do_md_run(struct mddev *mddev); | |
fd01b88c | 4143 | static int restart_array(struct mddev *mddev); |
9e653b63 N |
4144 | |
4145 | static ssize_t | |
fd01b88c | 4146 | array_state_store(struct mddev *mddev, const char *buf, size_t len) |
9e653b63 | 4147 | { |
6497709b | 4148 | int err = 0; |
9e653b63 | 4149 | enum array_state st = match_word(buf, array_states); |
6791875e N |
4150 | |
4151 | if (mddev->pers && (st == active || st == clean) && mddev->ro != 1) { | |
4152 | /* don't take reconfig_mutex when toggling between | |
4153 | * clean and active | |
4154 | */ | |
4155 | spin_lock(&mddev->lock); | |
4156 | if (st == active) { | |
4157 | restart_array(mddev); | |
2953079c | 4158 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
91a6c4ad | 4159 | md_wakeup_thread(mddev->thread); |
6791875e | 4160 | wake_up(&mddev->sb_wait); |
6791875e N |
4161 | } else /* st == clean */ { |
4162 | restart_array(mddev); | |
6497709b | 4163 | if (!set_in_sync(mddev)) |
6791875e N |
4164 | err = -EBUSY; |
4165 | } | |
573275b5 TM |
4166 | if (!err) |
4167 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
6791875e | 4168 | spin_unlock(&mddev->lock); |
c008f1d3 | 4169 | return err ?: len; |
6791875e N |
4170 | } |
4171 | err = mddev_lock(mddev); | |
4172 | if (err) | |
4173 | return err; | |
4174 | err = -EINVAL; | |
9e653b63 N |
4175 | switch(st) { |
4176 | case bad_word: | |
4177 | break; | |
4178 | case clear: | |
4179 | /* stopping an active array */ | |
a05b7ea0 | 4180 | err = do_md_stop(mddev, 0, NULL); |
9e653b63 N |
4181 | break; |
4182 | case inactive: | |
4183 | /* stopping an active array */ | |
90cf195d | 4184 | if (mddev->pers) |
a05b7ea0 | 4185 | err = do_md_stop(mddev, 2, NULL); |
90cf195d | 4186 | else |
e691063a | 4187 | err = 0; /* already inactive */ |
9e653b63 N |
4188 | break; |
4189 | case suspended: | |
4190 | break; /* not supported yet */ | |
4191 | case readonly: | |
4192 | if (mddev->pers) | |
a05b7ea0 | 4193 | err = md_set_readonly(mddev, NULL); |
9e653b63 N |
4194 | else { |
4195 | mddev->ro = 1; | |
648b629e | 4196 | set_disk_ro(mddev->gendisk, 1); |
9e653b63 N |
4197 | err = do_md_run(mddev); |
4198 | } | |
4199 | break; | |
4200 | case read_auto: | |
9e653b63 | 4201 | if (mddev->pers) { |
80268ee9 | 4202 | if (mddev->ro == 0) |
a05b7ea0 | 4203 | err = md_set_readonly(mddev, NULL); |
80268ee9 | 4204 | else if (mddev->ro == 1) |
648b629e N |
4205 | err = restart_array(mddev); |
4206 | if (err == 0) { | |
4207 | mddev->ro = 2; | |
4208 | set_disk_ro(mddev->gendisk, 0); | |
4209 | } | |
9e653b63 N |
4210 | } else { |
4211 | mddev->ro = 2; | |
4212 | err = do_md_run(mddev); | |
4213 | } | |
4214 | break; | |
4215 | case clean: | |
4216 | if (mddev->pers) { | |
339421de SL |
4217 | err = restart_array(mddev); |
4218 | if (err) | |
4219 | break; | |
85572d7c | 4220 | spin_lock(&mddev->lock); |
6497709b | 4221 | if (!set_in_sync(mddev)) |
e691063a | 4222 | err = -EBUSY; |
85572d7c | 4223 | spin_unlock(&mddev->lock); |
5bf29597 N |
4224 | } else |
4225 | err = -EINVAL; | |
9e653b63 N |
4226 | break; |
4227 | case active: | |
4228 | if (mddev->pers) { | |
339421de SL |
4229 | err = restart_array(mddev); |
4230 | if (err) | |
4231 | break; | |
2953079c | 4232 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
9e653b63 N |
4233 | wake_up(&mddev->sb_wait); |
4234 | err = 0; | |
4235 | } else { | |
4236 | mddev->ro = 0; | |
648b629e | 4237 | set_disk_ro(mddev->gendisk, 0); |
9e653b63 N |
4238 | err = do_md_run(mddev); |
4239 | } | |
4240 | break; | |
4241 | case write_pending: | |
4242 | case active_idle: | |
4243 | /* these cannot be set */ | |
4244 | break; | |
4245 | } | |
6791875e N |
4246 | |
4247 | if (!err) { | |
1d23f178 N |
4248 | if (mddev->hold_active == UNTIL_IOCTL) |
4249 | mddev->hold_active = 0; | |
00bcb4ac | 4250 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 4251 | } |
6791875e N |
4252 | mddev_unlock(mddev); |
4253 | return err ?: len; | |
9e653b63 | 4254 | } |
80ca3a44 | 4255 | static struct md_sysfs_entry md_array_state = |
750f199e | 4256 | __ATTR_PREALLOC(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store); |
9e653b63 | 4257 | |
1e50915f | 4258 | static ssize_t |
fd01b88c | 4259 | max_corrected_read_errors_show(struct mddev *mddev, char *page) { |
1e50915f RB |
4260 | return sprintf(page, "%d\n", |
4261 | atomic_read(&mddev->max_corr_read_errors)); | |
4262 | } | |
4263 | ||
4264 | static ssize_t | |
fd01b88c | 4265 | max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len) |
1e50915f | 4266 | { |
4c9309c0 AD |
4267 | unsigned int n; |
4268 | int rv; | |
1e50915f | 4269 | |
4c9309c0 AD |
4270 | rv = kstrtouint(buf, 10, &n); |
4271 | if (rv < 0) | |
4272 | return rv; | |
4273 | atomic_set(&mddev->max_corr_read_errors, n); | |
4274 | return len; | |
1e50915f RB |
4275 | } |
4276 | ||
4277 | static struct md_sysfs_entry max_corr_read_errors = | |
4278 | __ATTR(max_read_errors, S_IRUGO|S_IWUSR, max_corrected_read_errors_show, | |
4279 | max_corrected_read_errors_store); | |
4280 | ||
6d7ff738 | 4281 | static ssize_t |
fd01b88c | 4282 | null_show(struct mddev *mddev, char *page) |
6d7ff738 N |
4283 | { |
4284 | return -EINVAL; | |
4285 | } | |
4286 | ||
4287 | static ssize_t | |
fd01b88c | 4288 | new_dev_store(struct mddev *mddev, const char *buf, size_t len) |
6d7ff738 N |
4289 | { |
4290 | /* buf must be %d:%d\n? giving major and minor numbers */ | |
4291 | /* The new device is added to the array. | |
4292 | * If the array has a persistent superblock, we read the | |
4293 | * superblock to initialise info and check validity. | |
4294 | * Otherwise, only checking done is that in bind_rdev_to_array, | |
4295 | * which mainly checks size. | |
4296 | */ | |
4297 | char *e; | |
4298 | int major = simple_strtoul(buf, &e, 10); | |
4299 | int minor; | |
4300 | dev_t dev; | |
3cb03002 | 4301 | struct md_rdev *rdev; |
6d7ff738 N |
4302 | int err; |
4303 | ||
4304 | if (!*buf || *e != ':' || !e[1] || e[1] == '\n') | |
4305 | return -EINVAL; | |
4306 | minor = simple_strtoul(e+1, &e, 10); | |
4307 | if (*e && *e != '\n') | |
4308 | return -EINVAL; | |
4309 | dev = MKDEV(major, minor); | |
4310 | if (major != MAJOR(dev) || | |
4311 | minor != MINOR(dev)) | |
4312 | return -EOVERFLOW; | |
4313 | ||
6791875e N |
4314 | flush_workqueue(md_misc_wq); |
4315 | ||
4316 | err = mddev_lock(mddev); | |
4317 | if (err) | |
4318 | return err; | |
6d7ff738 N |
4319 | if (mddev->persistent) { |
4320 | rdev = md_import_device(dev, mddev->major_version, | |
4321 | mddev->minor_version); | |
4322 | if (!IS_ERR(rdev) && !list_empty(&mddev->disks)) { | |
3cb03002 N |
4323 | struct md_rdev *rdev0 |
4324 | = list_entry(mddev->disks.next, | |
4325 | struct md_rdev, same_set); | |
6d7ff738 N |
4326 | err = super_types[mddev->major_version] |
4327 | .load_super(rdev, rdev0, mddev->minor_version); | |
4328 | if (err < 0) | |
4329 | goto out; | |
4330 | } | |
c5d79adb N |
4331 | } else if (mddev->external) |
4332 | rdev = md_import_device(dev, -2, -1); | |
4333 | else | |
6d7ff738 N |
4334 | rdev = md_import_device(dev, -1, -1); |
4335 | ||
9a8c0fa8 N |
4336 | if (IS_ERR(rdev)) { |
4337 | mddev_unlock(mddev); | |
6d7ff738 | 4338 | return PTR_ERR(rdev); |
9a8c0fa8 | 4339 | } |
6d7ff738 N |
4340 | err = bind_rdev_to_array(rdev, mddev); |
4341 | out: | |
4342 | if (err) | |
4343 | export_rdev(rdev); | |
6791875e | 4344 | mddev_unlock(mddev); |
5492c46e AO |
4345 | if (!err) |
4346 | md_new_event(mddev); | |
6d7ff738 N |
4347 | return err ? err : len; |
4348 | } | |
4349 | ||
4350 | static struct md_sysfs_entry md_new_device = | |
80ca3a44 | 4351 | __ATTR(new_dev, S_IWUSR, null_show, new_dev_store); |
3b34380a | 4352 | |
9b1d1dac | 4353 | static ssize_t |
fd01b88c | 4354 | bitmap_store(struct mddev *mddev, const char *buf, size_t len) |
9b1d1dac PC |
4355 | { |
4356 | char *end; | |
4357 | unsigned long chunk, end_chunk; | |
6791875e | 4358 | int err; |
9b1d1dac | 4359 | |
6791875e N |
4360 | err = mddev_lock(mddev); |
4361 | if (err) | |
4362 | return err; | |
9b1d1dac PC |
4363 | if (!mddev->bitmap) |
4364 | goto out; | |
4365 | /* buf should be <chunk> <chunk> ... or <chunk>-<chunk> ... (range) */ | |
4366 | while (*buf) { | |
4367 | chunk = end_chunk = simple_strtoul(buf, &end, 0); | |
4368 | if (buf == end) break; | |
4369 | if (*end == '-') { /* range */ | |
4370 | buf = end + 1; | |
4371 | end_chunk = simple_strtoul(buf, &end, 0); | |
4372 | if (buf == end) break; | |
4373 | } | |
4374 | if (*end && !isspace(*end)) break; | |
4375 | bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk); | |
e7d2860b | 4376 | buf = skip_spaces(end); |
9b1d1dac PC |
4377 | } |
4378 | bitmap_unplug(mddev->bitmap); /* flush the bits to disk */ | |
4379 | out: | |
6791875e | 4380 | mddev_unlock(mddev); |
9b1d1dac PC |
4381 | return len; |
4382 | } | |
4383 | ||
4384 | static struct md_sysfs_entry md_bitmap = | |
4385 | __ATTR(bitmap_set_bits, S_IWUSR, null_show, bitmap_store); | |
4386 | ||
a35b0d69 | 4387 | static ssize_t |
fd01b88c | 4388 | size_show(struct mddev *mddev, char *page) |
a35b0d69 | 4389 | { |
58c0fed4 AN |
4390 | return sprintf(page, "%llu\n", |
4391 | (unsigned long long)mddev->dev_sectors / 2); | |
a35b0d69 N |
4392 | } |
4393 | ||
fd01b88c | 4394 | static int update_size(struct mddev *mddev, sector_t num_sectors); |
a35b0d69 N |
4395 | |
4396 | static ssize_t | |
fd01b88c | 4397 | size_store(struct mddev *mddev, const char *buf, size_t len) |
a35b0d69 N |
4398 | { |
4399 | /* If array is inactive, we can reduce the component size, but | |
4400 | * not increase it (except from 0). | |
4401 | * If array is active, we can try an on-line resize | |
4402 | */ | |
b522adcd DW |
4403 | sector_t sectors; |
4404 | int err = strict_blocks_to_sectors(buf, §ors); | |
a35b0d69 | 4405 | |
58c0fed4 AN |
4406 | if (err < 0) |
4407 | return err; | |
6791875e N |
4408 | err = mddev_lock(mddev); |
4409 | if (err) | |
4410 | return err; | |
a35b0d69 | 4411 | if (mddev->pers) { |
58c0fed4 | 4412 | err = update_size(mddev, sectors); |
4ba1e788 XN |
4413 | if (err == 0) |
4414 | md_update_sb(mddev, 1); | |
a35b0d69 | 4415 | } else { |
58c0fed4 AN |
4416 | if (mddev->dev_sectors == 0 || |
4417 | mddev->dev_sectors > sectors) | |
4418 | mddev->dev_sectors = sectors; | |
a35b0d69 N |
4419 | else |
4420 | err = -ENOSPC; | |
4421 | } | |
6791875e | 4422 | mddev_unlock(mddev); |
a35b0d69 N |
4423 | return err ? err : len; |
4424 | } | |
4425 | ||
4426 | static struct md_sysfs_entry md_size = | |
80ca3a44 | 4427 | __ATTR(component_size, S_IRUGO|S_IWUSR, size_show, size_store); |
a35b0d69 | 4428 | |
83f0d77a | 4429 | /* Metadata version. |
e691063a N |
4430 | * This is one of |
4431 | * 'none' for arrays with no metadata (good luck...) | |
4432 | * 'external' for arrays with externally managed metadata, | |
8bb93aac N |
4433 | * or N.M for internally known formats |
4434 | */ | |
4435 | static ssize_t | |
fd01b88c | 4436 | metadata_show(struct mddev *mddev, char *page) |
8bb93aac N |
4437 | { |
4438 | if (mddev->persistent) | |
4439 | return sprintf(page, "%d.%d\n", | |
4440 | mddev->major_version, mddev->minor_version); | |
e691063a N |
4441 | else if (mddev->external) |
4442 | return sprintf(page, "external:%s\n", mddev->metadata_type); | |
8bb93aac N |
4443 | else |
4444 | return sprintf(page, "none\n"); | |
4445 | } | |
4446 | ||
4447 | static ssize_t | |
fd01b88c | 4448 | metadata_store(struct mddev *mddev, const char *buf, size_t len) |
8bb93aac N |
4449 | { |
4450 | int major, minor; | |
4451 | char *e; | |
6791875e | 4452 | int err; |
ea43ddd8 N |
4453 | /* Changing the details of 'external' metadata is |
4454 | * always permitted. Otherwise there must be | |
4455 | * no devices attached to the array. | |
4456 | */ | |
6791875e N |
4457 | |
4458 | err = mddev_lock(mddev); | |
4459 | if (err) | |
4460 | return err; | |
4461 | err = -EBUSY; | |
ea43ddd8 N |
4462 | if (mddev->external && strncmp(buf, "external:", 9) == 0) |
4463 | ; | |
4464 | else if (!list_empty(&mddev->disks)) | |
6791875e | 4465 | goto out_unlock; |
8bb93aac | 4466 | |
6791875e | 4467 | err = 0; |
8bb93aac N |
4468 | if (cmd_match(buf, "none")) { |
4469 | mddev->persistent = 0; | |
e691063a N |
4470 | mddev->external = 0; |
4471 | mddev->major_version = 0; | |
4472 | mddev->minor_version = 90; | |
6791875e | 4473 | goto out_unlock; |
e691063a N |
4474 | } |
4475 | if (strncmp(buf, "external:", 9) == 0) { | |
20a49ff6 | 4476 | size_t namelen = len-9; |
e691063a N |
4477 | if (namelen >= sizeof(mddev->metadata_type)) |
4478 | namelen = sizeof(mddev->metadata_type)-1; | |
4479 | strncpy(mddev->metadata_type, buf+9, namelen); | |
4480 | mddev->metadata_type[namelen] = 0; | |
4481 | if (namelen && mddev->metadata_type[namelen-1] == '\n') | |
4482 | mddev->metadata_type[--namelen] = 0; | |
4483 | mddev->persistent = 0; | |
4484 | mddev->external = 1; | |
8bb93aac N |
4485 | mddev->major_version = 0; |
4486 | mddev->minor_version = 90; | |
6791875e | 4487 | goto out_unlock; |
8bb93aac N |
4488 | } |
4489 | major = simple_strtoul(buf, &e, 10); | |
6791875e | 4490 | err = -EINVAL; |
8bb93aac | 4491 | if (e==buf || *e != '.') |
6791875e | 4492 | goto out_unlock; |
8bb93aac N |
4493 | buf = e+1; |
4494 | minor = simple_strtoul(buf, &e, 10); | |
3f9d7b0d | 4495 | if (e==buf || (*e && *e != '\n') ) |
6791875e N |
4496 | goto out_unlock; |
4497 | err = -ENOENT; | |
50511da3 | 4498 | if (major >= ARRAY_SIZE(super_types) || super_types[major].name == NULL) |
6791875e | 4499 | goto out_unlock; |
8bb93aac N |
4500 | mddev->major_version = major; |
4501 | mddev->minor_version = minor; | |
4502 | mddev->persistent = 1; | |
e691063a | 4503 | mddev->external = 0; |
6791875e N |
4504 | err = 0; |
4505 | out_unlock: | |
4506 | mddev_unlock(mddev); | |
4507 | return err ?: len; | |
8bb93aac N |
4508 | } |
4509 | ||
4510 | static struct md_sysfs_entry md_metadata = | |
750f199e | 4511 | __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store); |
8bb93aac | 4512 | |
24dd469d | 4513 | static ssize_t |
fd01b88c | 4514 | action_show(struct mddev *mddev, char *page) |
24dd469d | 4515 | { |
7eec314d | 4516 | char *type = "idle"; |
b7b17c9b N |
4517 | unsigned long recovery = mddev->recovery; |
4518 | if (test_bit(MD_RECOVERY_FROZEN, &recovery)) | |
b6a9ce68 | 4519 | type = "frozen"; |
b7b17c9b N |
4520 | else if (test_bit(MD_RECOVERY_RUNNING, &recovery) || |
4521 | (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &recovery))) { | |
4522 | if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) | |
ccfcc3c1 | 4523 | type = "reshape"; |
b7b17c9b N |
4524 | else if (test_bit(MD_RECOVERY_SYNC, &recovery)) { |
4525 | if (!test_bit(MD_RECOVERY_REQUESTED, &recovery)) | |
24dd469d | 4526 | type = "resync"; |
b7b17c9b | 4527 | else if (test_bit(MD_RECOVERY_CHECK, &recovery)) |
24dd469d N |
4528 | type = "check"; |
4529 | else | |
4530 | type = "repair"; | |
b7b17c9b | 4531 | } else if (test_bit(MD_RECOVERY_RECOVER, &recovery)) |
24dd469d | 4532 | type = "recover"; |
985ca973 N |
4533 | else if (mddev->reshape_position != MaxSector) |
4534 | type = "reshape"; | |
24dd469d N |
4535 | } |
4536 | return sprintf(page, "%s\n", type); | |
4537 | } | |
4538 | ||
4539 | static ssize_t | |
fd01b88c | 4540 | action_store(struct mddev *mddev, const char *page, size_t len) |
24dd469d | 4541 | { |
7eec314d N |
4542 | if (!mddev->pers || !mddev->pers->sync_request) |
4543 | return -EINVAL; | |
4544 | ||
b6a9ce68 N |
4545 | |
4546 | if (cmd_match(page, "idle") || cmd_match(page, "frozen")) { | |
56ccc112 N |
4547 | if (cmd_match(page, "frozen")) |
4548 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4549 | else | |
4550 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
8e8e2518 N |
4551 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
4552 | mddev_lock(mddev) == 0) { | |
4553 | flush_workqueue(md_misc_wq); | |
4554 | if (mddev->sync_thread) { | |
4555 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
6791875e | 4556 | md_reap_sync_thread(mddev); |
6791875e | 4557 | } |
8e8e2518 | 4558 | mddev_unlock(mddev); |
7eec314d | 4559 | } |
312045ee | 4560 | } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
24dd469d | 4561 | return -EBUSY; |
72a23c21 | 4562 | else if (cmd_match(page, "resync")) |
56ccc112 | 4563 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4564 | else if (cmd_match(page, "recover")) { |
56ccc112 | 4565 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4566 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
72a23c21 | 4567 | } else if (cmd_match(page, "reshape")) { |
16484bf5 N |
4568 | int err; |
4569 | if (mddev->pers->start_reshape == NULL) | |
4570 | return -EINVAL; | |
6791875e N |
4571 | err = mddev_lock(mddev); |
4572 | if (!err) { | |
312045ee N |
4573 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4574 | err = -EBUSY; | |
4575 | else { | |
4576 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4577 | err = mddev->pers->start_reshape(mddev); | |
4578 | } | |
6791875e N |
4579 | mddev_unlock(mddev); |
4580 | } | |
16484bf5 N |
4581 | if (err) |
4582 | return err; | |
a99ac971 | 4583 | sysfs_notify(&mddev->kobj, NULL, "degraded"); |
16484bf5 | 4584 | } else { |
bce74dac | 4585 | if (cmd_match(page, "check")) |
7eec314d | 4586 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
2adc7d47 | 4587 | else if (!cmd_match(page, "repair")) |
7eec314d | 4588 | return -EINVAL; |
56ccc112 | 4589 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
7eec314d N |
4590 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
4591 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
7eec314d | 4592 | } |
48c26ddc N |
4593 | if (mddev->ro == 2) { |
4594 | /* A write to sync_action is enough to justify | |
4595 | * canceling read-auto mode | |
4596 | */ | |
4597 | mddev->ro = 0; | |
4598 | md_wakeup_thread(mddev->sync_thread); | |
4599 | } | |
03c902e1 | 4600 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
24dd469d | 4601 | md_wakeup_thread(mddev->thread); |
00bcb4ac | 4602 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
24dd469d N |
4603 | return len; |
4604 | } | |
4605 | ||
c4a39551 | 4606 | static struct md_sysfs_entry md_scan_mode = |
750f199e | 4607 | __ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store); |
c4a39551 JB |
4608 | |
4609 | static ssize_t | |
4610 | last_sync_action_show(struct mddev *mddev, char *page) | |
4611 | { | |
4612 | return sprintf(page, "%s\n", mddev->last_sync_action); | |
4613 | } | |
4614 | ||
4615 | static struct md_sysfs_entry md_last_scan_mode = __ATTR_RO(last_sync_action); | |
4616 | ||
9d88883e | 4617 | static ssize_t |
fd01b88c | 4618 | mismatch_cnt_show(struct mddev *mddev, char *page) |
9d88883e N |
4619 | { |
4620 | return sprintf(page, "%llu\n", | |
7f7583d4 JM |
4621 | (unsigned long long) |
4622 | atomic64_read(&mddev->resync_mismatches)); | |
9d88883e N |
4623 | } |
4624 | ||
80ca3a44 | 4625 | static struct md_sysfs_entry md_mismatches = __ATTR_RO(mismatch_cnt); |
9d88883e | 4626 | |
88202a0c | 4627 | static ssize_t |
fd01b88c | 4628 | sync_min_show(struct mddev *mddev, char *page) |
88202a0c N |
4629 | { |
4630 | return sprintf(page, "%d (%s)\n", speed_min(mddev), | |
4631 | mddev->sync_speed_min ? "local": "system"); | |
4632 | } | |
4633 | ||
4634 | static ssize_t | |
fd01b88c | 4635 | sync_min_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4636 | { |
4c9309c0 AD |
4637 | unsigned int min; |
4638 | int rv; | |
4639 | ||
88202a0c | 4640 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4641 | min = 0; |
4642 | } else { | |
4643 | rv = kstrtouint(buf, 10, &min); | |
4644 | if (rv < 0) | |
4645 | return rv; | |
4646 | if (min == 0) | |
4647 | return -EINVAL; | |
88202a0c | 4648 | } |
88202a0c N |
4649 | mddev->sync_speed_min = min; |
4650 | return len; | |
4651 | } | |
4652 | ||
4653 | static struct md_sysfs_entry md_sync_min = | |
4654 | __ATTR(sync_speed_min, S_IRUGO|S_IWUSR, sync_min_show, sync_min_store); | |
4655 | ||
4656 | static ssize_t | |
fd01b88c | 4657 | sync_max_show(struct mddev *mddev, char *page) |
88202a0c N |
4658 | { |
4659 | return sprintf(page, "%d (%s)\n", speed_max(mddev), | |
4660 | mddev->sync_speed_max ? "local": "system"); | |
4661 | } | |
4662 | ||
4663 | static ssize_t | |
fd01b88c | 4664 | sync_max_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4665 | { |
4c9309c0 AD |
4666 | unsigned int max; |
4667 | int rv; | |
4668 | ||
88202a0c | 4669 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4670 | max = 0; |
4671 | } else { | |
4672 | rv = kstrtouint(buf, 10, &max); | |
4673 | if (rv < 0) | |
4674 | return rv; | |
4675 | if (max == 0) | |
4676 | return -EINVAL; | |
88202a0c | 4677 | } |
88202a0c N |
4678 | mddev->sync_speed_max = max; |
4679 | return len; | |
4680 | } | |
4681 | ||
4682 | static struct md_sysfs_entry md_sync_max = | |
4683 | __ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store); | |
4684 | ||
d7f3d291 | 4685 | static ssize_t |
fd01b88c | 4686 | degraded_show(struct mddev *mddev, char *page) |
d7f3d291 IP |
4687 | { |
4688 | return sprintf(page, "%d\n", mddev->degraded); | |
4689 | } | |
4690 | static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded); | |
88202a0c | 4691 | |
90b08710 | 4692 | static ssize_t |
fd01b88c | 4693 | sync_force_parallel_show(struct mddev *mddev, char *page) |
90b08710 BS |
4694 | { |
4695 | return sprintf(page, "%d\n", mddev->parallel_resync); | |
4696 | } | |
4697 | ||
4698 | static ssize_t | |
fd01b88c | 4699 | sync_force_parallel_store(struct mddev *mddev, const char *buf, size_t len) |
90b08710 BS |
4700 | { |
4701 | long n; | |
4702 | ||
b29bebd6 | 4703 | if (kstrtol(buf, 10, &n)) |
90b08710 BS |
4704 | return -EINVAL; |
4705 | ||
4706 | if (n != 0 && n != 1) | |
4707 | return -EINVAL; | |
4708 | ||
4709 | mddev->parallel_resync = n; | |
4710 | ||
4711 | if (mddev->sync_thread) | |
4712 | wake_up(&resync_wait); | |
4713 | ||
4714 | return len; | |
4715 | } | |
4716 | ||
4717 | /* force parallel resync, even with shared block devices */ | |
4718 | static struct md_sysfs_entry md_sync_force_parallel = | |
4719 | __ATTR(sync_force_parallel, S_IRUGO|S_IWUSR, | |
4720 | sync_force_parallel_show, sync_force_parallel_store); | |
4721 | ||
88202a0c | 4722 | static ssize_t |
fd01b88c | 4723 | sync_speed_show(struct mddev *mddev, char *page) |
88202a0c N |
4724 | { |
4725 | unsigned long resync, dt, db; | |
d1a7c503 N |
4726 | if (mddev->curr_resync == 0) |
4727 | return sprintf(page, "none\n"); | |
9687a60c AN |
4728 | resync = mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active); |
4729 | dt = (jiffies - mddev->resync_mark) / HZ; | |
88202a0c | 4730 | if (!dt) dt++; |
9687a60c AN |
4731 | db = resync - mddev->resync_mark_cnt; |
4732 | return sprintf(page, "%lu\n", db/dt/2); /* K/sec */ | |
88202a0c N |
4733 | } |
4734 | ||
80ca3a44 | 4735 | static struct md_sysfs_entry md_sync_speed = __ATTR_RO(sync_speed); |
88202a0c N |
4736 | |
4737 | static ssize_t | |
fd01b88c | 4738 | sync_completed_show(struct mddev *mddev, char *page) |
88202a0c | 4739 | { |
13ae864b | 4740 | unsigned long long max_sectors, resync; |
88202a0c | 4741 | |
acb180b0 N |
4742 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4743 | return sprintf(page, "none\n"); | |
4744 | ||
72f36d59 N |
4745 | if (mddev->curr_resync == 1 || |
4746 | mddev->curr_resync == 2) | |
4747 | return sprintf(page, "delayed\n"); | |
4748 | ||
c804cdec N |
4749 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
4750 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
58c0fed4 | 4751 | max_sectors = mddev->resync_max_sectors; |
88202a0c | 4752 | else |
58c0fed4 | 4753 | max_sectors = mddev->dev_sectors; |
88202a0c | 4754 | |
acb180b0 | 4755 | resync = mddev->curr_resync_completed; |
13ae864b | 4756 | return sprintf(page, "%llu / %llu\n", resync, max_sectors); |
88202a0c N |
4757 | } |
4758 | ||
750f199e N |
4759 | static struct md_sysfs_entry md_sync_completed = |
4760 | __ATTR_PREALLOC(sync_completed, S_IRUGO, sync_completed_show, NULL); | |
88202a0c | 4761 | |
5e96ee65 | 4762 | static ssize_t |
fd01b88c | 4763 | min_sync_show(struct mddev *mddev, char *page) |
5e96ee65 NB |
4764 | { |
4765 | return sprintf(page, "%llu\n", | |
4766 | (unsigned long long)mddev->resync_min); | |
4767 | } | |
4768 | static ssize_t | |
fd01b88c | 4769 | min_sync_store(struct mddev *mddev, const char *buf, size_t len) |
5e96ee65 NB |
4770 | { |
4771 | unsigned long long min; | |
23da422b | 4772 | int err; |
23da422b | 4773 | |
b29bebd6 | 4774 | if (kstrtoull(buf, 10, &min)) |
5e96ee65 | 4775 | return -EINVAL; |
23da422b N |
4776 | |
4777 | spin_lock(&mddev->lock); | |
4778 | err = -EINVAL; | |
5e96ee65 | 4779 | if (min > mddev->resync_max) |
23da422b N |
4780 | goto out_unlock; |
4781 | ||
4782 | err = -EBUSY; | |
5e96ee65 | 4783 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 4784 | goto out_unlock; |
5e96ee65 | 4785 | |
50c37b13 N |
4786 | /* Round down to multiple of 4K for safety */ |
4787 | mddev->resync_min = round_down(min, 8); | |
23da422b | 4788 | err = 0; |
5e96ee65 | 4789 | |
23da422b N |
4790 | out_unlock: |
4791 | spin_unlock(&mddev->lock); | |
4792 | return err ?: len; | |
5e96ee65 NB |
4793 | } |
4794 | ||
4795 | static struct md_sysfs_entry md_min_sync = | |
4796 | __ATTR(sync_min, S_IRUGO|S_IWUSR, min_sync_show, min_sync_store); | |
4797 | ||
c6207277 | 4798 | static ssize_t |
fd01b88c | 4799 | max_sync_show(struct mddev *mddev, char *page) |
c6207277 N |
4800 | { |
4801 | if (mddev->resync_max == MaxSector) | |
4802 | return sprintf(page, "max\n"); | |
4803 | else | |
4804 | return sprintf(page, "%llu\n", | |
4805 | (unsigned long long)mddev->resync_max); | |
4806 | } | |
4807 | static ssize_t | |
fd01b88c | 4808 | max_sync_store(struct mddev *mddev, const char *buf, size_t len) |
c6207277 | 4809 | { |
23da422b N |
4810 | int err; |
4811 | spin_lock(&mddev->lock); | |
c6207277 N |
4812 | if (strncmp(buf, "max", 3) == 0) |
4813 | mddev->resync_max = MaxSector; | |
4814 | else { | |
5e96ee65 | 4815 | unsigned long long max; |
23da422b N |
4816 | int chunk; |
4817 | ||
4818 | err = -EINVAL; | |
b29bebd6 | 4819 | if (kstrtoull(buf, 10, &max)) |
23da422b | 4820 | goto out_unlock; |
5e96ee65 | 4821 | if (max < mddev->resync_min) |
23da422b N |
4822 | goto out_unlock; |
4823 | ||
4824 | err = -EBUSY; | |
c6207277 | 4825 | if (max < mddev->resync_max && |
4d484a4a | 4826 | mddev->ro == 0 && |
c6207277 | 4827 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 4828 | goto out_unlock; |
c6207277 N |
4829 | |
4830 | /* Must be a multiple of chunk_size */ | |
23da422b N |
4831 | chunk = mddev->chunk_sectors; |
4832 | if (chunk) { | |
2ac06c33 | 4833 | sector_t temp = max; |
23da422b N |
4834 | |
4835 | err = -EINVAL; | |
4836 | if (sector_div(temp, chunk)) | |
4837 | goto out_unlock; | |
c6207277 N |
4838 | } |
4839 | mddev->resync_max = max; | |
4840 | } | |
4841 | wake_up(&mddev->recovery_wait); | |
23da422b N |
4842 | err = 0; |
4843 | out_unlock: | |
4844 | spin_unlock(&mddev->lock); | |
4845 | return err ?: len; | |
c6207277 N |
4846 | } |
4847 | ||
4848 | static struct md_sysfs_entry md_max_sync = | |
4849 | __ATTR(sync_max, S_IRUGO|S_IWUSR, max_sync_show, max_sync_store); | |
4850 | ||
e464eafd | 4851 | static ssize_t |
fd01b88c | 4852 | suspend_lo_show(struct mddev *mddev, char *page) |
e464eafd N |
4853 | { |
4854 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_lo); | |
4855 | } | |
4856 | ||
4857 | static ssize_t | |
fd01b88c | 4858 | suspend_lo_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 4859 | { |
b03e0ccb | 4860 | unsigned long long new; |
6791875e | 4861 | int err; |
e464eafd | 4862 | |
4c9309c0 AD |
4863 | err = kstrtoull(buf, 10, &new); |
4864 | if (err < 0) | |
4865 | return err; | |
4866 | if (new != (sector_t)new) | |
e464eafd | 4867 | return -EINVAL; |
23ddff37 | 4868 | |
6791875e N |
4869 | err = mddev_lock(mddev); |
4870 | if (err) | |
4871 | return err; | |
4872 | err = -EINVAL; | |
4873 | if (mddev->pers == NULL || | |
4874 | mddev->pers->quiesce == NULL) | |
4875 | goto unlock; | |
b03e0ccb | 4876 | mddev_suspend(mddev); |
23ddff37 | 4877 | mddev->suspend_lo = new; |
b03e0ccb N |
4878 | mddev_resume(mddev); |
4879 | ||
6791875e N |
4880 | err = 0; |
4881 | unlock: | |
4882 | mddev_unlock(mddev); | |
4883 | return err ?: len; | |
e464eafd N |
4884 | } |
4885 | static struct md_sysfs_entry md_suspend_lo = | |
4886 | __ATTR(suspend_lo, S_IRUGO|S_IWUSR, suspend_lo_show, suspend_lo_store); | |
4887 | ||
e464eafd | 4888 | static ssize_t |
fd01b88c | 4889 | suspend_hi_show(struct mddev *mddev, char *page) |
e464eafd N |
4890 | { |
4891 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_hi); | |
4892 | } | |
4893 | ||
4894 | static ssize_t | |
fd01b88c | 4895 | suspend_hi_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 4896 | { |
b03e0ccb | 4897 | unsigned long long new; |
6791875e | 4898 | int err; |
e464eafd | 4899 | |
4c9309c0 AD |
4900 | err = kstrtoull(buf, 10, &new); |
4901 | if (err < 0) | |
4902 | return err; | |
4903 | if (new != (sector_t)new) | |
e464eafd | 4904 | return -EINVAL; |
23ddff37 | 4905 | |
6791875e N |
4906 | err = mddev_lock(mddev); |
4907 | if (err) | |
4908 | return err; | |
4909 | err = -EINVAL; | |
b03e0ccb | 4910 | if (mddev->pers == NULL) |
6791875e | 4911 | goto unlock; |
b03e0ccb N |
4912 | |
4913 | mddev_suspend(mddev); | |
23ddff37 | 4914 | mddev->suspend_hi = new; |
b03e0ccb N |
4915 | mddev_resume(mddev); |
4916 | ||
6791875e N |
4917 | err = 0; |
4918 | unlock: | |
4919 | mddev_unlock(mddev); | |
4920 | return err ?: len; | |
e464eafd N |
4921 | } |
4922 | static struct md_sysfs_entry md_suspend_hi = | |
4923 | __ATTR(suspend_hi, S_IRUGO|S_IWUSR, suspend_hi_show, suspend_hi_store); | |
4924 | ||
08a02ecd | 4925 | static ssize_t |
fd01b88c | 4926 | reshape_position_show(struct mddev *mddev, char *page) |
08a02ecd N |
4927 | { |
4928 | if (mddev->reshape_position != MaxSector) | |
4929 | return sprintf(page, "%llu\n", | |
4930 | (unsigned long long)mddev->reshape_position); | |
4931 | strcpy(page, "none\n"); | |
4932 | return 5; | |
4933 | } | |
4934 | ||
4935 | static ssize_t | |
fd01b88c | 4936 | reshape_position_store(struct mddev *mddev, const char *buf, size_t len) |
08a02ecd | 4937 | { |
c6563a8c | 4938 | struct md_rdev *rdev; |
4c9309c0 | 4939 | unsigned long long new; |
6791875e | 4940 | int err; |
6791875e | 4941 | |
4c9309c0 AD |
4942 | err = kstrtoull(buf, 10, &new); |
4943 | if (err < 0) | |
4944 | return err; | |
4945 | if (new != (sector_t)new) | |
08a02ecd | 4946 | return -EINVAL; |
6791875e N |
4947 | err = mddev_lock(mddev); |
4948 | if (err) | |
4949 | return err; | |
4950 | err = -EBUSY; | |
4951 | if (mddev->pers) | |
4952 | goto unlock; | |
08a02ecd N |
4953 | mddev->reshape_position = new; |
4954 | mddev->delta_disks = 0; | |
2c810cdd | 4955 | mddev->reshape_backwards = 0; |
08a02ecd N |
4956 | mddev->new_level = mddev->level; |
4957 | mddev->new_layout = mddev->layout; | |
664e7c41 | 4958 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
c6563a8c N |
4959 | rdev_for_each(rdev, mddev) |
4960 | rdev->new_data_offset = rdev->data_offset; | |
6791875e N |
4961 | err = 0; |
4962 | unlock: | |
4963 | mddev_unlock(mddev); | |
4964 | return err ?: len; | |
08a02ecd N |
4965 | } |
4966 | ||
4967 | static struct md_sysfs_entry md_reshape_position = | |
4968 | __ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show, | |
4969 | reshape_position_store); | |
4970 | ||
2c810cdd N |
4971 | static ssize_t |
4972 | reshape_direction_show(struct mddev *mddev, char *page) | |
4973 | { | |
4974 | return sprintf(page, "%s\n", | |
4975 | mddev->reshape_backwards ? "backwards" : "forwards"); | |
4976 | } | |
4977 | ||
4978 | static ssize_t | |
4979 | reshape_direction_store(struct mddev *mddev, const char *buf, size_t len) | |
4980 | { | |
4981 | int backwards = 0; | |
6791875e N |
4982 | int err; |
4983 | ||
2c810cdd N |
4984 | if (cmd_match(buf, "forwards")) |
4985 | backwards = 0; | |
4986 | else if (cmd_match(buf, "backwards")) | |
4987 | backwards = 1; | |
4988 | else | |
4989 | return -EINVAL; | |
4990 | if (mddev->reshape_backwards == backwards) | |
4991 | return len; | |
4992 | ||
6791875e N |
4993 | err = mddev_lock(mddev); |
4994 | if (err) | |
4995 | return err; | |
2c810cdd N |
4996 | /* check if we are allowed to change */ |
4997 | if (mddev->delta_disks) | |
6791875e N |
4998 | err = -EBUSY; |
4999 | else if (mddev->persistent && | |
2c810cdd | 5000 | mddev->major_version == 0) |
6791875e N |
5001 | err = -EINVAL; |
5002 | else | |
5003 | mddev->reshape_backwards = backwards; | |
5004 | mddev_unlock(mddev); | |
5005 | return err ?: len; | |
2c810cdd N |
5006 | } |
5007 | ||
5008 | static struct md_sysfs_entry md_reshape_direction = | |
5009 | __ATTR(reshape_direction, S_IRUGO|S_IWUSR, reshape_direction_show, | |
5010 | reshape_direction_store); | |
5011 | ||
b522adcd | 5012 | static ssize_t |
fd01b88c | 5013 | array_size_show(struct mddev *mddev, char *page) |
b522adcd DW |
5014 | { |
5015 | if (mddev->external_size) | |
5016 | return sprintf(page, "%llu\n", | |
5017 | (unsigned long long)mddev->array_sectors/2); | |
5018 | else | |
5019 | return sprintf(page, "default\n"); | |
5020 | } | |
5021 | ||
5022 | static ssize_t | |
fd01b88c | 5023 | array_size_store(struct mddev *mddev, const char *buf, size_t len) |
b522adcd DW |
5024 | { |
5025 | sector_t sectors; | |
6791875e N |
5026 | int err; |
5027 | ||
5028 | err = mddev_lock(mddev); | |
5029 | if (err) | |
5030 | return err; | |
b522adcd | 5031 | |
ab5a98b1 | 5032 | /* cluster raid doesn't support change array_sectors */ |
b670883b ZL |
5033 | if (mddev_is_clustered(mddev)) { |
5034 | mddev_unlock(mddev); | |
ab5a98b1 | 5035 | return -EINVAL; |
b670883b | 5036 | } |
ab5a98b1 | 5037 | |
b522adcd DW |
5038 | if (strncmp(buf, "default", 7) == 0) { |
5039 | if (mddev->pers) | |
5040 | sectors = mddev->pers->size(mddev, 0, 0); | |
5041 | else | |
5042 | sectors = mddev->array_sectors; | |
5043 | ||
5044 | mddev->external_size = 0; | |
5045 | } else { | |
5046 | if (strict_blocks_to_sectors(buf, §ors) < 0) | |
6791875e N |
5047 | err = -EINVAL; |
5048 | else if (mddev->pers && mddev->pers->size(mddev, 0, 0) < sectors) | |
5049 | err = -E2BIG; | |
5050 | else | |
5051 | mddev->external_size = 1; | |
b522adcd DW |
5052 | } |
5053 | ||
6791875e N |
5054 | if (!err) { |
5055 | mddev->array_sectors = sectors; | |
5056 | if (mddev->pers) { | |
5057 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
5058 | revalidate_disk(mddev->gendisk); | |
5059 | } | |
cbe6ef1d | 5060 | } |
6791875e N |
5061 | mddev_unlock(mddev); |
5062 | return err ?: len; | |
b522adcd DW |
5063 | } |
5064 | ||
5065 | static struct md_sysfs_entry md_array_size = | |
5066 | __ATTR(array_size, S_IRUGO|S_IWUSR, array_size_show, | |
5067 | array_size_store); | |
e464eafd | 5068 | |
664aed04 AP |
5069 | static ssize_t |
5070 | consistency_policy_show(struct mddev *mddev, char *page) | |
5071 | { | |
5072 | int ret; | |
5073 | ||
5074 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) { | |
5075 | ret = sprintf(page, "journal\n"); | |
5076 | } else if (test_bit(MD_HAS_PPL, &mddev->flags)) { | |
5077 | ret = sprintf(page, "ppl\n"); | |
5078 | } else if (mddev->bitmap) { | |
5079 | ret = sprintf(page, "bitmap\n"); | |
5080 | } else if (mddev->pers) { | |
5081 | if (mddev->pers->sync_request) | |
5082 | ret = sprintf(page, "resync\n"); | |
5083 | else | |
5084 | ret = sprintf(page, "none\n"); | |
5085 | } else { | |
5086 | ret = sprintf(page, "unknown\n"); | |
5087 | } | |
5088 | ||
5089 | return ret; | |
5090 | } | |
5091 | ||
5092 | static ssize_t | |
5093 | consistency_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5094 | { | |
ba903a3e AP |
5095 | int err = 0; |
5096 | ||
664aed04 | 5097 | if (mddev->pers) { |
ba903a3e AP |
5098 | if (mddev->pers->change_consistency_policy) |
5099 | err = mddev->pers->change_consistency_policy(mddev, buf); | |
5100 | else | |
5101 | err = -EBUSY; | |
664aed04 AP |
5102 | } else if (mddev->external && strncmp(buf, "ppl", 3) == 0) { |
5103 | set_bit(MD_HAS_PPL, &mddev->flags); | |
664aed04 | 5104 | } else { |
ba903a3e | 5105 | err = -EINVAL; |
664aed04 | 5106 | } |
ba903a3e AP |
5107 | |
5108 | return err ? err : len; | |
664aed04 AP |
5109 | } |
5110 | ||
5111 | static struct md_sysfs_entry md_consistency_policy = | |
5112 | __ATTR(consistency_policy, S_IRUGO | S_IWUSR, consistency_policy_show, | |
5113 | consistency_policy_store); | |
5114 | ||
eae1701f N |
5115 | static struct attribute *md_default_attrs[] = { |
5116 | &md_level.attr, | |
d4dbd025 | 5117 | &md_layout.attr, |
eae1701f | 5118 | &md_raid_disks.attr, |
3b34380a | 5119 | &md_chunk_size.attr, |
a35b0d69 | 5120 | &md_size.attr, |
a94213b1 | 5121 | &md_resync_start.attr, |
8bb93aac | 5122 | &md_metadata.attr, |
6d7ff738 | 5123 | &md_new_device.attr, |
16f17b39 | 5124 | &md_safe_delay.attr, |
9e653b63 | 5125 | &md_array_state.attr, |
08a02ecd | 5126 | &md_reshape_position.attr, |
2c810cdd | 5127 | &md_reshape_direction.attr, |
b522adcd | 5128 | &md_array_size.attr, |
1e50915f | 5129 | &max_corr_read_errors.attr, |
664aed04 | 5130 | &md_consistency_policy.attr, |
411036fa N |
5131 | NULL, |
5132 | }; | |
5133 | ||
5134 | static struct attribute *md_redundancy_attrs[] = { | |
24dd469d | 5135 | &md_scan_mode.attr, |
c4a39551 | 5136 | &md_last_scan_mode.attr, |
9d88883e | 5137 | &md_mismatches.attr, |
88202a0c N |
5138 | &md_sync_min.attr, |
5139 | &md_sync_max.attr, | |
5140 | &md_sync_speed.attr, | |
90b08710 | 5141 | &md_sync_force_parallel.attr, |
88202a0c | 5142 | &md_sync_completed.attr, |
5e96ee65 | 5143 | &md_min_sync.attr, |
c6207277 | 5144 | &md_max_sync.attr, |
e464eafd N |
5145 | &md_suspend_lo.attr, |
5146 | &md_suspend_hi.attr, | |
9b1d1dac | 5147 | &md_bitmap.attr, |
d7f3d291 | 5148 | &md_degraded.attr, |
eae1701f N |
5149 | NULL, |
5150 | }; | |
411036fa N |
5151 | static struct attribute_group md_redundancy_group = { |
5152 | .name = NULL, | |
5153 | .attrs = md_redundancy_attrs, | |
5154 | }; | |
5155 | ||
eae1701f N |
5156 | static ssize_t |
5157 | md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
5158 | { | |
5159 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5160 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5161 | ssize_t rv; |
eae1701f N |
5162 | |
5163 | if (!entry->show) | |
5164 | return -EIO; | |
af8a2434 N |
5165 | spin_lock(&all_mddevs_lock); |
5166 | if (list_empty(&mddev->all_mddevs)) { | |
5167 | spin_unlock(&all_mddevs_lock); | |
5168 | return -EBUSY; | |
5169 | } | |
5170 | mddev_get(mddev); | |
5171 | spin_unlock(&all_mddevs_lock); | |
5172 | ||
b7b17c9b | 5173 | rv = entry->show(mddev, page); |
af8a2434 | 5174 | mddev_put(mddev); |
96de1e66 | 5175 | return rv; |
eae1701f N |
5176 | } |
5177 | ||
5178 | static ssize_t | |
5179 | md_attr_store(struct kobject *kobj, struct attribute *attr, | |
5180 | const char *page, size_t length) | |
5181 | { | |
5182 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5183 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5184 | ssize_t rv; |
eae1701f N |
5185 | |
5186 | if (!entry->store) | |
5187 | return -EIO; | |
67463acb N |
5188 | if (!capable(CAP_SYS_ADMIN)) |
5189 | return -EACCES; | |
af8a2434 N |
5190 | spin_lock(&all_mddevs_lock); |
5191 | if (list_empty(&mddev->all_mddevs)) { | |
5192 | spin_unlock(&all_mddevs_lock); | |
5193 | return -EBUSY; | |
5194 | } | |
5195 | mddev_get(mddev); | |
5196 | spin_unlock(&all_mddevs_lock); | |
6791875e | 5197 | rv = entry->store(mddev, page, length); |
af8a2434 | 5198 | mddev_put(mddev); |
96de1e66 | 5199 | return rv; |
eae1701f N |
5200 | } |
5201 | ||
5202 | static void md_free(struct kobject *ko) | |
5203 | { | |
fd01b88c | 5204 | struct mddev *mddev = container_of(ko, struct mddev, kobj); |
a21d1504 N |
5205 | |
5206 | if (mddev->sysfs_state) | |
5207 | sysfs_put(mddev->sysfs_state); | |
5208 | ||
6cd18e71 N |
5209 | if (mddev->queue) |
5210 | blk_cleanup_queue(mddev->queue); | |
a21d1504 N |
5211 | if (mddev->gendisk) { |
5212 | del_gendisk(mddev->gendisk); | |
5213 | put_disk(mddev->gendisk); | |
5214 | } | |
4ad23a97 | 5215 | percpu_ref_exit(&mddev->writes_pending); |
a21d1504 | 5216 | |
eae1701f N |
5217 | kfree(mddev); |
5218 | } | |
5219 | ||
52cf25d0 | 5220 | static const struct sysfs_ops md_sysfs_ops = { |
eae1701f N |
5221 | .show = md_attr_show, |
5222 | .store = md_attr_store, | |
5223 | }; | |
5224 | static struct kobj_type md_ktype = { | |
5225 | .release = md_free, | |
5226 | .sysfs_ops = &md_sysfs_ops, | |
5227 | .default_attrs = md_default_attrs, | |
5228 | }; | |
5229 | ||
1da177e4 LT |
5230 | int mdp_major = 0; |
5231 | ||
5fd3a17e DW |
5232 | static void mddev_delayed_delete(struct work_struct *ws) |
5233 | { | |
fd01b88c | 5234 | struct mddev *mddev = container_of(ws, struct mddev, del_work); |
5fd3a17e | 5235 | |
43a70507 | 5236 | sysfs_remove_group(&mddev->kobj, &md_bitmap_group); |
5fd3a17e DW |
5237 | kobject_del(&mddev->kobj); |
5238 | kobject_put(&mddev->kobj); | |
5239 | } | |
5240 | ||
4ad23a97 N |
5241 | static void no_op(struct percpu_ref *r) {} |
5242 | ||
a415c0f1 N |
5243 | int mddev_init_writes_pending(struct mddev *mddev) |
5244 | { | |
5245 | if (mddev->writes_pending.percpu_count_ptr) | |
5246 | return 0; | |
5247 | if (percpu_ref_init(&mddev->writes_pending, no_op, 0, GFP_KERNEL) < 0) | |
5248 | return -ENOMEM; | |
5249 | /* We want to start with the refcount at zero */ | |
5250 | percpu_ref_put(&mddev->writes_pending); | |
5251 | return 0; | |
5252 | } | |
5253 | EXPORT_SYMBOL_GPL(mddev_init_writes_pending); | |
5254 | ||
efeb53c0 | 5255 | static int md_alloc(dev_t dev, char *name) |
1da177e4 | 5256 | { |
039b7225 N |
5257 | /* |
5258 | * If dev is zero, name is the name of a device to allocate with | |
5259 | * an arbitrary minor number. It will be "md_???" | |
5260 | * If dev is non-zero it must be a device number with a MAJOR of | |
5261 | * MD_MAJOR or mdp_major. In this case, if "name" is NULL, then | |
5262 | * the device is being created by opening a node in /dev. | |
5263 | * If "name" is not NULL, the device is being created by | |
5264 | * writing to /sys/module/md_mod/parameters/new_array. | |
5265 | */ | |
48c9c27b | 5266 | static DEFINE_MUTEX(disks_mutex); |
fd01b88c | 5267 | struct mddev *mddev = mddev_find(dev); |
1da177e4 | 5268 | struct gendisk *disk; |
efeb53c0 N |
5269 | int partitioned; |
5270 | int shift; | |
5271 | int unit; | |
3830c62f | 5272 | int error; |
1da177e4 LT |
5273 | |
5274 | if (!mddev) | |
efeb53c0 N |
5275 | return -ENODEV; |
5276 | ||
5277 | partitioned = (MAJOR(mddev->unit) != MD_MAJOR); | |
5278 | shift = partitioned ? MdpMinorShift : 0; | |
5279 | unit = MINOR(mddev->unit) >> shift; | |
1da177e4 | 5280 | |
e804ac78 TH |
5281 | /* wait for any previous instance of this device to be |
5282 | * completely removed (mddev_delayed_delete). | |
d3374825 | 5283 | */ |
e804ac78 | 5284 | flush_workqueue(md_misc_wq); |
d3374825 | 5285 | |
48c9c27b | 5286 | mutex_lock(&disks_mutex); |
0909dc44 N |
5287 | error = -EEXIST; |
5288 | if (mddev->gendisk) | |
5289 | goto abort; | |
efeb53c0 | 5290 | |
039b7225 | 5291 | if (name && !dev) { |
efeb53c0 N |
5292 | /* Need to ensure that 'name' is not a duplicate. |
5293 | */ | |
fd01b88c | 5294 | struct mddev *mddev2; |
efeb53c0 N |
5295 | spin_lock(&all_mddevs_lock); |
5296 | ||
5297 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) | |
5298 | if (mddev2->gendisk && | |
5299 | strcmp(mddev2->gendisk->disk_name, name) == 0) { | |
5300 | spin_unlock(&all_mddevs_lock); | |
0909dc44 | 5301 | goto abort; |
efeb53c0 N |
5302 | } |
5303 | spin_unlock(&all_mddevs_lock); | |
1da177e4 | 5304 | } |
039b7225 N |
5305 | if (name && dev) |
5306 | /* | |
5307 | * Creating /dev/mdNNN via "newarray", so adjust hold_active. | |
5308 | */ | |
5309 | mddev->hold_active = UNTIL_STOP; | |
8b765398 | 5310 | |
0909dc44 | 5311 | error = -ENOMEM; |
8b765398 | 5312 | mddev->queue = blk_alloc_queue(GFP_KERNEL); |
0909dc44 N |
5313 | if (!mddev->queue) |
5314 | goto abort; | |
409c57f3 N |
5315 | mddev->queue->queuedata = mddev; |
5316 | ||
409c57f3 | 5317 | blk_queue_make_request(mddev->queue, md_make_request); |
b1bd055d | 5318 | blk_set_stacking_limits(&mddev->queue->limits); |
8b765398 | 5319 | |
1da177e4 LT |
5320 | disk = alloc_disk(1 << shift); |
5321 | if (!disk) { | |
8b765398 N |
5322 | blk_cleanup_queue(mddev->queue); |
5323 | mddev->queue = NULL; | |
0909dc44 | 5324 | goto abort; |
1da177e4 | 5325 | } |
efeb53c0 | 5326 | disk->major = MAJOR(mddev->unit); |
1da177e4 | 5327 | disk->first_minor = unit << shift; |
efeb53c0 N |
5328 | if (name) |
5329 | strcpy(disk->disk_name, name); | |
5330 | else if (partitioned) | |
1da177e4 | 5331 | sprintf(disk->disk_name, "md_d%d", unit); |
ce7b0f46 | 5332 | else |
1da177e4 | 5333 | sprintf(disk->disk_name, "md%d", unit); |
1da177e4 LT |
5334 | disk->fops = &md_fops; |
5335 | disk->private_data = mddev; | |
5336 | disk->queue = mddev->queue; | |
56883a7e | 5337 | blk_queue_write_cache(mddev->queue, true, true); |
92850bbd | 5338 | /* Allow extended partitions. This makes the |
d3374825 | 5339 | * 'mdp' device redundant, but we can't really |
92850bbd N |
5340 | * remove it now. |
5341 | */ | |
5342 | disk->flags |= GENHD_FL_EXT_DEVT; | |
1da177e4 | 5343 | mddev->gendisk = disk; |
b0140891 N |
5344 | /* As soon as we call add_disk(), another thread could get |
5345 | * through to md_open, so make sure it doesn't get too far | |
5346 | */ | |
5347 | mutex_lock(&mddev->open_mutex); | |
5348 | add_disk(disk); | |
5349 | ||
ed9e1982 TH |
5350 | error = kobject_init_and_add(&mddev->kobj, &md_ktype, |
5351 | &disk_to_dev(disk)->kobj, "%s", "md"); | |
0909dc44 N |
5352 | if (error) { |
5353 | /* This isn't possible, but as kobject_init_and_add is marked | |
5354 | * __must_check, we must do something with the result | |
5355 | */ | |
9d48739e N |
5356 | pr_debug("md: cannot register %s/md - name in use\n", |
5357 | disk->disk_name); | |
0909dc44 N |
5358 | error = 0; |
5359 | } | |
00bcb4ac N |
5360 | if (mddev->kobj.sd && |
5361 | sysfs_create_group(&mddev->kobj, &md_bitmap_group)) | |
9d48739e | 5362 | pr_debug("pointless warning\n"); |
b0140891 | 5363 | mutex_unlock(&mddev->open_mutex); |
0909dc44 N |
5364 | abort: |
5365 | mutex_unlock(&disks_mutex); | |
00bcb4ac | 5366 | if (!error && mddev->kobj.sd) { |
3830c62f | 5367 | kobject_uevent(&mddev->kobj, KOBJ_ADD); |
00bcb4ac | 5368 | mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state"); |
b62b7590 | 5369 | } |
d3374825 | 5370 | mddev_put(mddev); |
0909dc44 | 5371 | return error; |
efeb53c0 N |
5372 | } |
5373 | ||
5374 | static struct kobject *md_probe(dev_t dev, int *part, void *data) | |
5375 | { | |
78b6350d N |
5376 | if (create_on_open) |
5377 | md_alloc(dev, NULL); | |
1da177e4 LT |
5378 | return NULL; |
5379 | } | |
5380 | ||
e4dca7b7 | 5381 | static int add_named_array(const char *val, const struct kernel_param *kp) |
efeb53c0 | 5382 | { |
039b7225 N |
5383 | /* |
5384 | * val must be "md_*" or "mdNNN". | |
5385 | * For "md_*" we allocate an array with a large free minor number, and | |
efeb53c0 | 5386 | * set the name to val. val must not already be an active name. |
039b7225 N |
5387 | * For "mdNNN" we allocate an array with the minor number NNN |
5388 | * which must not already be in use. | |
efeb53c0 N |
5389 | */ |
5390 | int len = strlen(val); | |
5391 | char buf[DISK_NAME_LEN]; | |
039b7225 | 5392 | unsigned long devnum; |
efeb53c0 N |
5393 | |
5394 | while (len && val[len-1] == '\n') | |
5395 | len--; | |
5396 | if (len >= DISK_NAME_LEN) | |
5397 | return -E2BIG; | |
5398 | strlcpy(buf, val, len+1); | |
039b7225 N |
5399 | if (strncmp(buf, "md_", 3) == 0) |
5400 | return md_alloc(0, buf); | |
5401 | if (strncmp(buf, "md", 2) == 0 && | |
5402 | isdigit(buf[2]) && | |
5403 | kstrtoul(buf+2, 10, &devnum) == 0 && | |
5404 | devnum <= MINORMASK) | |
5405 | return md_alloc(MKDEV(MD_MAJOR, devnum), NULL); | |
5406 | ||
5407 | return -EINVAL; | |
efeb53c0 N |
5408 | } |
5409 | ||
8376d3c1 | 5410 | static void md_safemode_timeout(struct timer_list *t) |
1da177e4 | 5411 | { |
8376d3c1 | 5412 | struct mddev *mddev = from_timer(mddev, t, safemode_timer); |
1da177e4 | 5413 | |
4ad23a97 N |
5414 | mddev->safemode = 1; |
5415 | if (mddev->external) | |
5416 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
5417 | ||
1da177e4 LT |
5418 | md_wakeup_thread(mddev->thread); |
5419 | } | |
5420 | ||
6ff8d8ec | 5421 | static int start_dirty_degraded; |
1da177e4 | 5422 | |
fd01b88c | 5423 | int md_run(struct mddev *mddev) |
1da177e4 | 5424 | { |
2604b703 | 5425 | int err; |
3cb03002 | 5426 | struct md_rdev *rdev; |
84fc4b56 | 5427 | struct md_personality *pers; |
1da177e4 | 5428 | |
a757e64c N |
5429 | if (list_empty(&mddev->disks)) |
5430 | /* cannot run an array with no devices.. */ | |
1da177e4 | 5431 | return -EINVAL; |
1da177e4 LT |
5432 | |
5433 | if (mddev->pers) | |
5434 | return -EBUSY; | |
bb4f1e9d N |
5435 | /* Cannot run until previous stop completes properly */ |
5436 | if (mddev->sysfs_active) | |
5437 | return -EBUSY; | |
b6eb127d | 5438 | |
1da177e4 LT |
5439 | /* |
5440 | * Analyze all RAID superblock(s) | |
5441 | */ | |
1ec4a939 N |
5442 | if (!mddev->raid_disks) { |
5443 | if (!mddev->persistent) | |
5444 | return -EINVAL; | |
a757e64c | 5445 | analyze_sbs(mddev); |
1ec4a939 | 5446 | } |
1da177e4 | 5447 | |
d9d166c2 N |
5448 | if (mddev->level != LEVEL_NONE) |
5449 | request_module("md-level-%d", mddev->level); | |
5450 | else if (mddev->clevel[0]) | |
5451 | request_module("md-%s", mddev->clevel); | |
1da177e4 LT |
5452 | |
5453 | /* | |
5454 | * Drop all container device buffers, from now on | |
5455 | * the only valid external interface is through the md | |
5456 | * device. | |
1da177e4 | 5457 | */ |
8961ee79 | 5458 | mddev->has_superblocks = false; |
dafb20fa | 5459 | rdev_for_each(rdev, mddev) { |
b2d444d7 | 5460 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
5461 | continue; |
5462 | sync_blockdev(rdev->bdev); | |
f98393a6 | 5463 | invalidate_bdev(rdev->bdev); |
97b20ef7 N |
5464 | if (mddev->ro != 1 && |
5465 | (bdev_read_only(rdev->bdev) || | |
5466 | bdev_read_only(rdev->meta_bdev))) { | |
5467 | mddev->ro = 1; | |
5468 | if (mddev->gendisk) | |
5469 | set_disk_ro(mddev->gendisk, 1); | |
5470 | } | |
f0d76d70 | 5471 | |
8961ee79 HM |
5472 | if (rdev->sb_page) |
5473 | mddev->has_superblocks = true; | |
5474 | ||
f0d76d70 N |
5475 | /* perform some consistency tests on the device. |
5476 | * We don't want the data to overlap the metadata, | |
58c0fed4 | 5477 | * Internal Bitmap issues have been handled elsewhere. |
f0d76d70 | 5478 | */ |
a6ff7e08 JB |
5479 | if (rdev->meta_bdev) { |
5480 | /* Nothing to check */; | |
5481 | } else if (rdev->data_offset < rdev->sb_start) { | |
58c0fed4 AN |
5482 | if (mddev->dev_sectors && |
5483 | rdev->data_offset + mddev->dev_sectors | |
0f420358 | 5484 | > rdev->sb_start) { |
9d48739e N |
5485 | pr_warn("md: %s: data overlaps metadata\n", |
5486 | mdname(mddev)); | |
f0d76d70 N |
5487 | return -EINVAL; |
5488 | } | |
5489 | } else { | |
0f420358 | 5490 | if (rdev->sb_start + rdev->sb_size/512 |
f0d76d70 | 5491 | > rdev->data_offset) { |
9d48739e N |
5492 | pr_warn("md: %s: metadata overlaps data\n", |
5493 | mdname(mddev)); | |
f0d76d70 N |
5494 | return -EINVAL; |
5495 | } | |
5496 | } | |
00bcb4ac | 5497 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
5498 | } |
5499 | ||
10273170 | 5500 | if (mddev->bio_set == NULL) { |
011067b0 | 5501 | mddev->bio_set = bioset_create(BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); |
10273170 ML |
5502 | if (!mddev->bio_set) |
5503 | return -ENOMEM; | |
5504 | } | |
5a85071c | 5505 | if (mddev->sync_set == NULL) { |
026d15f6 | 5506 | mddev->sync_set = bioset_create(BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); |
14a13473 XN |
5507 | if (!mddev->sync_set) { |
5508 | err = -ENOMEM; | |
5509 | goto abort; | |
5510 | } | |
5a85071c | 5511 | } |
a167f663 | 5512 | |
1da177e4 | 5513 | spin_lock(&pers_lock); |
d9d166c2 | 5514 | pers = find_pers(mddev->level, mddev->clevel); |
2604b703 | 5515 | if (!pers || !try_module_get(pers->owner)) { |
1da177e4 | 5516 | spin_unlock(&pers_lock); |
d9d166c2 | 5517 | if (mddev->level != LEVEL_NONE) |
9d48739e N |
5518 | pr_warn("md: personality for level %d is not loaded!\n", |
5519 | mddev->level); | |
d9d166c2 | 5520 | else |
9d48739e N |
5521 | pr_warn("md: personality for level %s is not loaded!\n", |
5522 | mddev->clevel); | |
14a13473 XN |
5523 | err = -EINVAL; |
5524 | goto abort; | |
1da177e4 | 5525 | } |
1da177e4 | 5526 | spin_unlock(&pers_lock); |
34817e8c N |
5527 | if (mddev->level != pers->level) { |
5528 | mddev->level = pers->level; | |
5529 | mddev->new_level = pers->level; | |
5530 | } | |
d9d166c2 | 5531 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
1da177e4 | 5532 | |
f6705578 | 5533 | if (mddev->reshape_position != MaxSector && |
63c70c4f | 5534 | pers->start_reshape == NULL) { |
f6705578 | 5535 | /* This personality cannot handle reshaping... */ |
f6705578 | 5536 | module_put(pers->owner); |
14a13473 XN |
5537 | err = -EINVAL; |
5538 | goto abort; | |
f6705578 N |
5539 | } |
5540 | ||
7dd5e7c3 N |
5541 | if (pers->sync_request) { |
5542 | /* Warn if this is a potentially silly | |
5543 | * configuration. | |
5544 | */ | |
5545 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 5546 | struct md_rdev *rdev2; |
7dd5e7c3 | 5547 | int warned = 0; |
159ec1fc | 5548 | |
dafb20fa N |
5549 | rdev_for_each(rdev, mddev) |
5550 | rdev_for_each(rdev2, mddev) { | |
7dd5e7c3 N |
5551 | if (rdev < rdev2 && |
5552 | rdev->bdev->bd_contains == | |
5553 | rdev2->bdev->bd_contains) { | |
9d48739e N |
5554 | pr_warn("%s: WARNING: %s appears to be on the same physical disk as %s.\n", |
5555 | mdname(mddev), | |
5556 | bdevname(rdev->bdev,b), | |
5557 | bdevname(rdev2->bdev,b2)); | |
7dd5e7c3 N |
5558 | warned = 1; |
5559 | } | |
5560 | } | |
159ec1fc | 5561 | |
7dd5e7c3 | 5562 | if (warned) |
9d48739e | 5563 | pr_warn("True protection against single-disk failure might be compromised.\n"); |
7dd5e7c3 N |
5564 | } |
5565 | ||
657390d2 | 5566 | mddev->recovery = 0; |
58c0fed4 AN |
5567 | /* may be over-ridden by personality */ |
5568 | mddev->resync_max_sectors = mddev->dev_sectors; | |
5569 | ||
6ff8d8ec | 5570 | mddev->ok_start_degraded = start_dirty_degraded; |
1da177e4 | 5571 | |
0f9552b5 | 5572 | if (start_readonly && mddev->ro == 0) |
f91de92e N |
5573 | mddev->ro = 2; /* read-only, but switch on first write */ |
5574 | ||
a85dd7b8 SL |
5575 | /* |
5576 | * NOTE: some pers->run(), for example r5l_recovery_log(), wakes | |
5577 | * up mddev->thread. It is important to initialize critical | |
5578 | * resources for mddev->thread BEFORE calling pers->run(). | |
5579 | */ | |
36d091f4 | 5580 | err = pers->run(mddev); |
13e53df3 | 5581 | if (err) |
9d48739e | 5582 | pr_warn("md: pers->run() failed ...\n"); |
36d091f4 | 5583 | else if (pers->size(mddev, 0, 0) < mddev->array_sectors) { |
9d48739e N |
5584 | WARN_ONCE(!mddev->external_size, |
5585 | "%s: default size too small, but 'external_size' not in effect?\n", | |
5586 | __func__); | |
5587 | pr_warn("md: invalid array_size %llu > default size %llu\n", | |
5588 | (unsigned long long)mddev->array_sectors / 2, | |
5589 | (unsigned long long)pers->size(mddev, 0, 0) / 2); | |
b522adcd | 5590 | err = -EINVAL; |
b522adcd | 5591 | } |
36d091f4 | 5592 | if (err == 0 && pers->sync_request && |
ef99bf48 | 5593 | (mddev->bitmap_info.file || mddev->bitmap_info.offset)) { |
f9209a32 GR |
5594 | struct bitmap *bitmap; |
5595 | ||
5596 | bitmap = bitmap_create(mddev, -1); | |
5597 | if (IS_ERR(bitmap)) { | |
5598 | err = PTR_ERR(bitmap); | |
9d48739e N |
5599 | pr_warn("%s: failed to create bitmap (%d)\n", |
5600 | mdname(mddev), err); | |
f9209a32 GR |
5601 | } else |
5602 | mddev->bitmap = bitmap; | |
5603 | ||
b15c2e57 | 5604 | } |
1da177e4 | 5605 | if (err) { |
5aa61f42 | 5606 | mddev_detach(mddev); |
0c35bd47 N |
5607 | if (mddev->private) |
5608 | pers->free(mddev, mddev->private); | |
bd691922 | 5609 | mddev->private = NULL; |
36d091f4 | 5610 | module_put(pers->owner); |
32a7627c | 5611 | bitmap_destroy(mddev); |
14a13473 | 5612 | goto abort; |
1da177e4 | 5613 | } |
5c675f83 | 5614 | if (mddev->queue) { |
bb086a89 SL |
5615 | bool nonrot = true; |
5616 | ||
5617 | rdev_for_each(rdev, mddev) { | |
5618 | if (rdev->raid_disk >= 0 && | |
5619 | !blk_queue_nonrot(bdev_get_queue(rdev->bdev))) { | |
5620 | nonrot = false; | |
5621 | break; | |
5622 | } | |
5623 | } | |
5624 | if (mddev->degraded) | |
5625 | nonrot = false; | |
5626 | if (nonrot) | |
5627 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, mddev->queue); | |
5628 | else | |
5629 | queue_flag_clear_unlocked(QUEUE_FLAG_NONROT, mddev->queue); | |
dc3b17cc JK |
5630 | mddev->queue->backing_dev_info->congested_data = mddev; |
5631 | mddev->queue->backing_dev_info->congested_fn = md_congested; | |
5c675f83 | 5632 | } |
36d091f4 | 5633 | if (pers->sync_request) { |
00bcb4ac N |
5634 | if (mddev->kobj.sd && |
5635 | sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
5636 | pr_warn("md: cannot register extra attributes for %s\n", |
5637 | mdname(mddev)); | |
00bcb4ac | 5638 | mddev->sysfs_action = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_action"); |
5e55e2f5 | 5639 | } else if (mddev->ro == 2) /* auto-readonly not meaningful */ |
fd9d49ca N |
5640 | mddev->ro = 0; |
5641 | ||
1e50915f RB |
5642 | atomic_set(&mddev->max_corr_read_errors, |
5643 | MD_DEFAULT_MAX_CORRECTED_READ_ERRORS); | |
1da177e4 | 5644 | mddev->safemode = 0; |
28c1b9fd GR |
5645 | if (mddev_is_clustered(mddev)) |
5646 | mddev->safemode_delay = 0; | |
5647 | else | |
5648 | mddev->safemode_delay = (200 * HZ)/1000 +1; /* 200 msec delay */ | |
1da177e4 | 5649 | mddev->in_sync = 1; |
0ca69886 | 5650 | smp_wmb(); |
36d091f4 N |
5651 | spin_lock(&mddev->lock); |
5652 | mddev->pers = pers; | |
36d091f4 | 5653 | spin_unlock(&mddev->lock); |
dafb20fa | 5654 | rdev_for_each(rdev, mddev) |
36fad858 NK |
5655 | if (rdev->raid_disk >= 0) |
5656 | if (sysfs_link_rdev(mddev, rdev)) | |
00bcb4ac | 5657 | /* failure here is OK */; |
f72ffdd6 | 5658 | |
a4a3d26d N |
5659 | if (mddev->degraded && !mddev->ro) |
5660 | /* This ensures that recovering status is reported immediately | |
5661 | * via sysfs - until a lack of spares is confirmed. | |
5662 | */ | |
5663 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
1da177e4 | 5664 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f72ffdd6 | 5665 | |
2953079c | 5666 | if (mddev->sb_flags) |
850b2b42 | 5667 | md_update_sb(mddev, 0); |
1da177e4 | 5668 | |
d7603b7e | 5669 | md_new_event(mddev); |
00bcb4ac N |
5670 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
5671 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
a99ac971 | 5672 | sysfs_notify(&mddev->kobj, NULL, "degraded"); |
1da177e4 | 5673 | return 0; |
14a13473 XN |
5674 | |
5675 | abort: | |
5676 | if (mddev->bio_set) { | |
5677 | bioset_free(mddev->bio_set); | |
5678 | mddev->bio_set = NULL; | |
5679 | } | |
5680 | if (mddev->sync_set) { | |
5681 | bioset_free(mddev->sync_set); | |
5682 | mddev->sync_set = NULL; | |
5683 | } | |
5684 | ||
5685 | return err; | |
1da177e4 | 5686 | } |
390ee602 | 5687 | EXPORT_SYMBOL_GPL(md_run); |
1da177e4 | 5688 | |
fd01b88c | 5689 | static int do_md_run(struct mddev *mddev) |
fe60b014 N |
5690 | { |
5691 | int err; | |
5692 | ||
5693 | err = md_run(mddev); | |
5694 | if (err) | |
5695 | goto out; | |
69e51b44 N |
5696 | err = bitmap_load(mddev); |
5697 | if (err) { | |
5698 | bitmap_destroy(mddev); | |
5699 | goto out; | |
5700 | } | |
0fd018af | 5701 | |
28c1b9fd GR |
5702 | if (mddev_is_clustered(mddev)) |
5703 | md_allow_write(mddev); | |
5704 | ||
0fd018af JB |
5705 | md_wakeup_thread(mddev->thread); |
5706 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
5707 | ||
fe60b014 N |
5708 | set_capacity(mddev->gendisk, mddev->array_sectors); |
5709 | revalidate_disk(mddev->gendisk); | |
f0b4f7e2 | 5710 | mddev->changed = 1; |
fe60b014 N |
5711 | kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); |
5712 | out: | |
5713 | return err; | |
5714 | } | |
5715 | ||
fd01b88c | 5716 | static int restart_array(struct mddev *mddev) |
1da177e4 LT |
5717 | { |
5718 | struct gendisk *disk = mddev->gendisk; | |
97b20ef7 N |
5719 | struct md_rdev *rdev; |
5720 | bool has_journal = false; | |
5721 | bool has_readonly = false; | |
1da177e4 | 5722 | |
80fab1d7 | 5723 | /* Complain if it has no devices */ |
1da177e4 | 5724 | if (list_empty(&mddev->disks)) |
80fab1d7 AN |
5725 | return -ENXIO; |
5726 | if (!mddev->pers) | |
5727 | return -EINVAL; | |
5728 | if (!mddev->ro) | |
5729 | return -EBUSY; | |
339421de | 5730 | |
97b20ef7 N |
5731 | rcu_read_lock(); |
5732 | rdev_for_each_rcu(rdev, mddev) { | |
5733 | if (test_bit(Journal, &rdev->flags) && | |
5734 | !test_bit(Faulty, &rdev->flags)) | |
5735 | has_journal = true; | |
5736 | if (bdev_read_only(rdev->bdev)) | |
5737 | has_readonly = true; | |
5738 | } | |
5739 | rcu_read_unlock(); | |
5740 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags) && !has_journal) | |
339421de | 5741 | /* Don't restart rw with journal missing/faulty */ |
339421de | 5742 | return -EINVAL; |
97b20ef7 N |
5743 | if (has_readonly) |
5744 | return -EROFS; | |
339421de | 5745 | |
80fab1d7 AN |
5746 | mddev->safemode = 0; |
5747 | mddev->ro = 0; | |
5748 | set_disk_ro(disk, 0); | |
9d48739e | 5749 | pr_debug("md: %s switched to read-write mode.\n", mdname(mddev)); |
80fab1d7 AN |
5750 | /* Kick recovery or resync if necessary */ |
5751 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
5752 | md_wakeup_thread(mddev->thread); | |
5753 | md_wakeup_thread(mddev->sync_thread); | |
00bcb4ac | 5754 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
80fab1d7 | 5755 | return 0; |
1da177e4 LT |
5756 | } |
5757 | ||
fd01b88c | 5758 | static void md_clean(struct mddev *mddev) |
6177b472 N |
5759 | { |
5760 | mddev->array_sectors = 0; | |
5761 | mddev->external_size = 0; | |
5762 | mddev->dev_sectors = 0; | |
5763 | mddev->raid_disks = 0; | |
5764 | mddev->recovery_cp = 0; | |
5765 | mddev->resync_min = 0; | |
5766 | mddev->resync_max = MaxSector; | |
5767 | mddev->reshape_position = MaxSector; | |
5768 | mddev->external = 0; | |
5769 | mddev->persistent = 0; | |
5770 | mddev->level = LEVEL_NONE; | |
5771 | mddev->clevel[0] = 0; | |
5772 | mddev->flags = 0; | |
2953079c | 5773 | mddev->sb_flags = 0; |
6177b472 N |
5774 | mddev->ro = 0; |
5775 | mddev->metadata_type[0] = 0; | |
5776 | mddev->chunk_sectors = 0; | |
5777 | mddev->ctime = mddev->utime = 0; | |
5778 | mddev->layout = 0; | |
5779 | mddev->max_disks = 0; | |
5780 | mddev->events = 0; | |
a8707c08 | 5781 | mddev->can_decrease_events = 0; |
6177b472 | 5782 | mddev->delta_disks = 0; |
2c810cdd | 5783 | mddev->reshape_backwards = 0; |
6177b472 N |
5784 | mddev->new_level = LEVEL_NONE; |
5785 | mddev->new_layout = 0; | |
5786 | mddev->new_chunk_sectors = 0; | |
5787 | mddev->curr_resync = 0; | |
7f7583d4 | 5788 | atomic64_set(&mddev->resync_mismatches, 0); |
6177b472 N |
5789 | mddev->suspend_lo = mddev->suspend_hi = 0; |
5790 | mddev->sync_speed_min = mddev->sync_speed_max = 0; | |
5791 | mddev->recovery = 0; | |
5792 | mddev->in_sync = 0; | |
f0b4f7e2 | 5793 | mddev->changed = 0; |
6177b472 | 5794 | mddev->degraded = 0; |
6177b472 | 5795 | mddev->safemode = 0; |
bd691922 | 5796 | mddev->private = NULL; |
c20c33f0 | 5797 | mddev->cluster_info = NULL; |
6177b472 N |
5798 | mddev->bitmap_info.offset = 0; |
5799 | mddev->bitmap_info.default_offset = 0; | |
6409bb05 | 5800 | mddev->bitmap_info.default_space = 0; |
6177b472 N |
5801 | mddev->bitmap_info.chunksize = 0; |
5802 | mddev->bitmap_info.daemon_sleep = 0; | |
5803 | mddev->bitmap_info.max_write_behind = 0; | |
c20c33f0 | 5804 | mddev->bitmap_info.nodes = 0; |
6177b472 N |
5805 | } |
5806 | ||
fd01b88c | 5807 | static void __md_stop_writes(struct mddev *mddev) |
a047e125 | 5808 | { |
6b6204ee | 5809 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
f851b60d | 5810 | flush_workqueue(md_misc_wq); |
a047e125 | 5811 | if (mddev->sync_thread) { |
a047e125 | 5812 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
a91d5ac0 | 5813 | md_reap_sync_thread(mddev); |
a047e125 N |
5814 | } |
5815 | ||
5816 | del_timer_sync(&mddev->safemode_timer); | |
5817 | ||
034e33f5 SL |
5818 | if (mddev->pers && mddev->pers->quiesce) { |
5819 | mddev->pers->quiesce(mddev, 1); | |
5820 | mddev->pers->quiesce(mddev, 0); | |
5821 | } | |
a047e125 | 5822 | bitmap_flush(mddev); |
a047e125 | 5823 | |
b6d428c6 | 5824 | if (mddev->ro == 0 && |
28c1b9fd | 5825 | ((!mddev->in_sync && !mddev_is_clustered(mddev)) || |
2953079c | 5826 | mddev->sb_flags)) { |
a047e125 | 5827 | /* mark array as shutdown cleanly */ |
28c1b9fd GR |
5828 | if (!mddev_is_clustered(mddev)) |
5829 | mddev->in_sync = 1; | |
a047e125 N |
5830 | md_update_sb(mddev, 1); |
5831 | } | |
5832 | } | |
defad61a | 5833 | |
fd01b88c | 5834 | void md_stop_writes(struct mddev *mddev) |
defad61a | 5835 | { |
29f097c4 | 5836 | mddev_lock_nointr(mddev); |
defad61a N |
5837 | __md_stop_writes(mddev); |
5838 | mddev_unlock(mddev); | |
5839 | } | |
390ee602 | 5840 | EXPORT_SYMBOL_GPL(md_stop_writes); |
a047e125 | 5841 | |
5aa61f42 N |
5842 | static void mddev_detach(struct mddev *mddev) |
5843 | { | |
48df498d | 5844 | bitmap_wait_behind_writes(mddev); |
36d091f4 | 5845 | if (mddev->pers && mddev->pers->quiesce) { |
5aa61f42 N |
5846 | mddev->pers->quiesce(mddev, 1); |
5847 | mddev->pers->quiesce(mddev, 0); | |
5848 | } | |
5849 | md_unregister_thread(&mddev->thread); | |
5850 | if (mddev->queue) | |
5851 | blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ | |
5852 | } | |
5853 | ||
5eff3c43 | 5854 | static void __md_stop(struct mddev *mddev) |
6177b472 | 5855 | { |
36d091f4 | 5856 | struct md_personality *pers = mddev->pers; |
48df498d | 5857 | bitmap_destroy(mddev); |
5aa61f42 | 5858 | mddev_detach(mddev); |
ee5d004f N |
5859 | /* Ensure ->event_work is done */ |
5860 | flush_workqueue(md_misc_wq); | |
36d091f4 | 5861 | spin_lock(&mddev->lock); |
6177b472 | 5862 | mddev->pers = NULL; |
36d091f4 N |
5863 | spin_unlock(&mddev->lock); |
5864 | pers->free(mddev, mddev->private); | |
bd691922 | 5865 | mddev->private = NULL; |
36d091f4 N |
5866 | if (pers->sync_request && mddev->to_remove == NULL) |
5867 | mddev->to_remove = &md_redundancy_group; | |
5868 | module_put(pers->owner); | |
cca9cf90 | 5869 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
6177b472 | 5870 | } |
5eff3c43 N |
5871 | |
5872 | void md_stop(struct mddev *mddev) | |
5873 | { | |
5874 | /* stop the array and free an attached data structures. | |
5875 | * This is called from dm-raid | |
5876 | */ | |
5877 | __md_stop(mddev); | |
0202ce8a | 5878 | if (mddev->bio_set) { |
5eff3c43 | 5879 | bioset_free(mddev->bio_set); |
0202ce8a ZK |
5880 | mddev->bio_set = NULL; |
5881 | } | |
5882 | if (mddev->sync_set) { | |
5883 | bioset_free(mddev->sync_set); | |
5884 | mddev->sync_set = NULL; | |
5885 | } | |
5eff3c43 N |
5886 | } |
5887 | ||
390ee602 | 5888 | EXPORT_SYMBOL_GPL(md_stop); |
6177b472 | 5889 | |
a05b7ea0 | 5890 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) |
a4bd82d0 N |
5891 | { |
5892 | int err = 0; | |
30b8feb7 N |
5893 | int did_freeze = 0; |
5894 | ||
5895 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
5896 | did_freeze = 1; | |
5897 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
5898 | md_wakeup_thread(mddev->thread); | |
5899 | } | |
f851b60d | 5900 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 5901 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 5902 | if (mddev->sync_thread) |
30b8feb7 N |
5903 | /* Thread might be blocked waiting for metadata update |
5904 | * which will now never happen */ | |
5905 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 5906 | |
2953079c | 5907 | if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
88724bfa | 5908 | return -EBUSY; |
30b8feb7 | 5909 | mddev_unlock(mddev); |
f851b60d N |
5910 | wait_event(resync_wait, !test_bit(MD_RECOVERY_RUNNING, |
5911 | &mddev->recovery)); | |
88724bfa | 5912 | wait_event(mddev->sb_wait, |
2953079c | 5913 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
30b8feb7 N |
5914 | mddev_lock_nointr(mddev); |
5915 | ||
a4bd82d0 | 5916 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 5917 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 | 5918 | mddev->sync_thread || |
af8d8e6f | 5919 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 5920 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
30b8feb7 N |
5921 | if (did_freeze) { |
5922 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 5923 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
5924 | md_wakeup_thread(mddev->thread); |
5925 | } | |
a4bd82d0 N |
5926 | err = -EBUSY; |
5927 | goto out; | |
5928 | } | |
5929 | if (mddev->pers) { | |
defad61a | 5930 | __md_stop_writes(mddev); |
a4bd82d0 N |
5931 | |
5932 | err = -ENXIO; | |
5933 | if (mddev->ro==1) | |
5934 | goto out; | |
5935 | mddev->ro = 1; | |
5936 | set_disk_ro(mddev->gendisk, 1); | |
5937 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d N |
5938 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
5939 | md_wakeup_thread(mddev->thread); | |
00bcb4ac | 5940 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
30b8feb7 | 5941 | err = 0; |
a4bd82d0 N |
5942 | } |
5943 | out: | |
5944 | mutex_unlock(&mddev->open_mutex); | |
5945 | return err; | |
5946 | } | |
5947 | ||
9e653b63 N |
5948 | /* mode: |
5949 | * 0 - completely stop and dis-assemble array | |
9e653b63 N |
5950 | * 2 - stop but do not disassemble array |
5951 | */ | |
f72ffdd6 | 5952 | static int do_md_stop(struct mddev *mddev, int mode, |
a05b7ea0 | 5953 | struct block_device *bdev) |
1da177e4 | 5954 | { |
1da177e4 | 5955 | struct gendisk *disk = mddev->gendisk; |
3cb03002 | 5956 | struct md_rdev *rdev; |
30b8feb7 N |
5957 | int did_freeze = 0; |
5958 | ||
5959 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
5960 | did_freeze = 1; | |
5961 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
5962 | md_wakeup_thread(mddev->thread); | |
5963 | } | |
f851b60d | 5964 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 5965 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 5966 | if (mddev->sync_thread) |
30b8feb7 N |
5967 | /* Thread might be blocked waiting for metadata update |
5968 | * which will now never happen */ | |
5969 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 5970 | |
30b8feb7 | 5971 | mddev_unlock(mddev); |
f851b60d N |
5972 | wait_event(resync_wait, (mddev->sync_thread == NULL && |
5973 | !test_bit(MD_RECOVERY_RUNNING, | |
5974 | &mddev->recovery))); | |
30b8feb7 | 5975 | mddev_lock_nointr(mddev); |
1da177e4 | 5976 | |
c8c00a69 | 5977 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 5978 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 N |
5979 | mddev->sysfs_active || |
5980 | mddev->sync_thread || | |
af8d8e6f | 5981 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 5982 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
6e17b027 | 5983 | mutex_unlock(&mddev->open_mutex); |
30b8feb7 N |
5984 | if (did_freeze) { |
5985 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 5986 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
5987 | md_wakeup_thread(mddev->thread); |
5988 | } | |
260fa034 N |
5989 | return -EBUSY; |
5990 | } | |
6e17b027 | 5991 | if (mddev->pers) { |
a4bd82d0 N |
5992 | if (mddev->ro) |
5993 | set_disk_ro(disk, 0); | |
409c57f3 | 5994 | |
defad61a | 5995 | __md_stop_writes(mddev); |
5eff3c43 | 5996 | __md_stop(mddev); |
dc3b17cc | 5997 | mddev->queue->backing_dev_info->congested_fn = NULL; |
6177b472 | 5998 | |
a4bd82d0 | 5999 | /* tell userspace to handle 'inactive' */ |
00bcb4ac | 6000 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0d4ca600 | 6001 | |
dafb20fa | 6002 | rdev_for_each(rdev, mddev) |
36fad858 NK |
6003 | if (rdev->raid_disk >= 0) |
6004 | sysfs_unlink_rdev(mddev, rdev); | |
c4647292 | 6005 | |
a4bd82d0 | 6006 | set_capacity(disk, 0); |
6e17b027 | 6007 | mutex_unlock(&mddev->open_mutex); |
f0b4f7e2 | 6008 | mddev->changed = 1; |
a4bd82d0 | 6009 | revalidate_disk(disk); |
0d4ca600 | 6010 | |
a4bd82d0 N |
6011 | if (mddev->ro) |
6012 | mddev->ro = 0; | |
6e17b027 N |
6013 | } else |
6014 | mutex_unlock(&mddev->open_mutex); | |
1da177e4 LT |
6015 | /* |
6016 | * Free resources if final stop | |
6017 | */ | |
9e653b63 | 6018 | if (mode == 0) { |
9d48739e | 6019 | pr_info("md: %s stopped.\n", mdname(mddev)); |
1da177e4 | 6020 | |
c3d9714e | 6021 | if (mddev->bitmap_info.file) { |
4af1a041 N |
6022 | struct file *f = mddev->bitmap_info.file; |
6023 | spin_lock(&mddev->lock); | |
c3d9714e | 6024 | mddev->bitmap_info.file = NULL; |
4af1a041 N |
6025 | spin_unlock(&mddev->lock); |
6026 | fput(f); | |
978f946b | 6027 | } |
c3d9714e | 6028 | mddev->bitmap_info.offset = 0; |
978f946b | 6029 | |
1da177e4 LT |
6030 | export_array(mddev); |
6031 | ||
6177b472 | 6032 | md_clean(mddev); |
efeb53c0 N |
6033 | if (mddev->hold_active == UNTIL_STOP) |
6034 | mddev->hold_active = 0; | |
a4bd82d0 | 6035 | } |
d7603b7e | 6036 | md_new_event(mddev); |
00bcb4ac | 6037 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6e17b027 | 6038 | return 0; |
1da177e4 LT |
6039 | } |
6040 | ||
fdee8ae4 | 6041 | #ifndef MODULE |
fd01b88c | 6042 | static void autorun_array(struct mddev *mddev) |
1da177e4 | 6043 | { |
3cb03002 | 6044 | struct md_rdev *rdev; |
1da177e4 LT |
6045 | int err; |
6046 | ||
a757e64c | 6047 | if (list_empty(&mddev->disks)) |
1da177e4 | 6048 | return; |
1da177e4 | 6049 | |
9d48739e | 6050 | pr_info("md: running: "); |
1da177e4 | 6051 | |
dafb20fa | 6052 | rdev_for_each(rdev, mddev) { |
1da177e4 | 6053 | char b[BDEVNAME_SIZE]; |
9d48739e | 6054 | pr_cont("<%s>", bdevname(rdev->bdev,b)); |
1da177e4 | 6055 | } |
9d48739e | 6056 | pr_cont("\n"); |
1da177e4 | 6057 | |
d710e138 | 6058 | err = do_md_run(mddev); |
1da177e4 | 6059 | if (err) { |
9d48739e | 6060 | pr_warn("md: do_md_run() returned %d\n", err); |
a05b7ea0 | 6061 | do_md_stop(mddev, 0, NULL); |
1da177e4 LT |
6062 | } |
6063 | } | |
6064 | ||
6065 | /* | |
6066 | * lets try to run arrays based on all disks that have arrived | |
6067 | * until now. (those are in pending_raid_disks) | |
6068 | * | |
6069 | * the method: pick the first pending disk, collect all disks with | |
6070 | * the same UUID, remove all from the pending list and put them into | |
6071 | * the 'same_array' list. Then order this list based on superblock | |
6072 | * update time (freshest comes first), kick out 'old' disks and | |
6073 | * compare superblocks. If everything's fine then run it. | |
6074 | * | |
6075 | * If "unit" is allocated, then bump its reference count | |
6076 | */ | |
6077 | static void autorun_devices(int part) | |
6078 | { | |
3cb03002 | 6079 | struct md_rdev *rdev0, *rdev, *tmp; |
fd01b88c | 6080 | struct mddev *mddev; |
1da177e4 LT |
6081 | char b[BDEVNAME_SIZE]; |
6082 | ||
9d48739e | 6083 | pr_info("md: autorun ...\n"); |
1da177e4 | 6084 | while (!list_empty(&pending_raid_disks)) { |
e8703fe1 | 6085 | int unit; |
1da177e4 | 6086 | dev_t dev; |
ad01c9e3 | 6087 | LIST_HEAD(candidates); |
1da177e4 | 6088 | rdev0 = list_entry(pending_raid_disks.next, |
3cb03002 | 6089 | struct md_rdev, same_set); |
1da177e4 | 6090 | |
9d48739e | 6091 | pr_debug("md: considering %s ...\n", bdevname(rdev0->bdev,b)); |
1da177e4 | 6092 | INIT_LIST_HEAD(&candidates); |
159ec1fc | 6093 | rdev_for_each_list(rdev, tmp, &pending_raid_disks) |
1da177e4 | 6094 | if (super_90_load(rdev, rdev0, 0) >= 0) { |
9d48739e N |
6095 | pr_debug("md: adding %s ...\n", |
6096 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
6097 | list_move(&rdev->same_set, &candidates); |
6098 | } | |
6099 | /* | |
6100 | * now we have a set of devices, with all of them having | |
6101 | * mostly sane superblocks. It's time to allocate the | |
6102 | * mddev. | |
6103 | */ | |
e8703fe1 N |
6104 | if (part) { |
6105 | dev = MKDEV(mdp_major, | |
6106 | rdev0->preferred_minor << MdpMinorShift); | |
6107 | unit = MINOR(dev) >> MdpMinorShift; | |
6108 | } else { | |
6109 | dev = MKDEV(MD_MAJOR, rdev0->preferred_minor); | |
6110 | unit = MINOR(dev); | |
6111 | } | |
6112 | if (rdev0->preferred_minor != unit) { | |
9d48739e N |
6113 | pr_warn("md: unit number in %s is bad: %d\n", |
6114 | bdevname(rdev0->bdev, b), rdev0->preferred_minor); | |
1da177e4 LT |
6115 | break; |
6116 | } | |
1da177e4 LT |
6117 | |
6118 | md_probe(dev, NULL, NULL); | |
6119 | mddev = mddev_find(dev); | |
9bbbca3a NB |
6120 | if (!mddev || !mddev->gendisk) { |
6121 | if (mddev) | |
6122 | mddev_put(mddev); | |
1da177e4 LT |
6123 | break; |
6124 | } | |
f72ffdd6 | 6125 | if (mddev_lock(mddev)) |
9d48739e | 6126 | pr_warn("md: %s locked, cannot run\n", mdname(mddev)); |
1da177e4 LT |
6127 | else if (mddev->raid_disks || mddev->major_version |
6128 | || !list_empty(&mddev->disks)) { | |
9d48739e | 6129 | pr_warn("md: %s already running, cannot run %s\n", |
1da177e4 LT |
6130 | mdname(mddev), bdevname(rdev0->bdev,b)); |
6131 | mddev_unlock(mddev); | |
6132 | } else { | |
9d48739e | 6133 | pr_debug("md: created %s\n", mdname(mddev)); |
1ec4a939 | 6134 | mddev->persistent = 1; |
159ec1fc | 6135 | rdev_for_each_list(rdev, tmp, &candidates) { |
1da177e4 LT |
6136 | list_del_init(&rdev->same_set); |
6137 | if (bind_rdev_to_array(rdev, mddev)) | |
6138 | export_rdev(rdev); | |
6139 | } | |
6140 | autorun_array(mddev); | |
6141 | mddev_unlock(mddev); | |
6142 | } | |
6143 | /* on success, candidates will be empty, on error | |
6144 | * it won't... | |
6145 | */ | |
159ec1fc | 6146 | rdev_for_each_list(rdev, tmp, &candidates) { |
4b80991c | 6147 | list_del_init(&rdev->same_set); |
1da177e4 | 6148 | export_rdev(rdev); |
4b80991c | 6149 | } |
1da177e4 LT |
6150 | mddev_put(mddev); |
6151 | } | |
9d48739e | 6152 | pr_info("md: ... autorun DONE.\n"); |
1da177e4 | 6153 | } |
fdee8ae4 | 6154 | #endif /* !MODULE */ |
1da177e4 | 6155 | |
f72ffdd6 | 6156 | static int get_version(void __user *arg) |
1da177e4 LT |
6157 | { |
6158 | mdu_version_t ver; | |
6159 | ||
6160 | ver.major = MD_MAJOR_VERSION; | |
6161 | ver.minor = MD_MINOR_VERSION; | |
6162 | ver.patchlevel = MD_PATCHLEVEL_VERSION; | |
6163 | ||
6164 | if (copy_to_user(arg, &ver, sizeof(ver))) | |
6165 | return -EFAULT; | |
6166 | ||
6167 | return 0; | |
6168 | } | |
6169 | ||
f72ffdd6 | 6170 | static int get_array_info(struct mddev *mddev, void __user *arg) |
1da177e4 LT |
6171 | { |
6172 | mdu_array_info_t info; | |
a9f326eb | 6173 | int nr,working,insync,failed,spare; |
3cb03002 | 6174 | struct md_rdev *rdev; |
1da177e4 | 6175 | |
1ca69c4b N |
6176 | nr = working = insync = failed = spare = 0; |
6177 | rcu_read_lock(); | |
6178 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 6179 | nr++; |
b2d444d7 | 6180 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
6181 | failed++; |
6182 | else { | |
6183 | working++; | |
b2d444d7 | 6184 | if (test_bit(In_sync, &rdev->flags)) |
f72ffdd6 | 6185 | insync++; |
b347af81 SL |
6186 | else if (test_bit(Journal, &rdev->flags)) |
6187 | /* TODO: add journal count to md_u.h */ | |
6188 | ; | |
1da177e4 LT |
6189 | else |
6190 | spare++; | |
6191 | } | |
6192 | } | |
1ca69c4b | 6193 | rcu_read_unlock(); |
1da177e4 LT |
6194 | |
6195 | info.major_version = mddev->major_version; | |
6196 | info.minor_version = mddev->minor_version; | |
6197 | info.patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6198 | info.ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 6199 | info.level = mddev->level; |
58c0fed4 AN |
6200 | info.size = mddev->dev_sectors / 2; |
6201 | if (info.size != mddev->dev_sectors / 2) /* overflow */ | |
284ae7ca | 6202 | info.size = -1; |
1da177e4 LT |
6203 | info.nr_disks = nr; |
6204 | info.raid_disks = mddev->raid_disks; | |
6205 | info.md_minor = mddev->md_minor; | |
6206 | info.not_persistent= !mddev->persistent; | |
6207 | ||
9ebc6ef1 | 6208 | info.utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
6209 | info.state = 0; |
6210 | if (mddev->in_sync) | |
6211 | info.state = (1<<MD_SB_CLEAN); | |
c3d9714e | 6212 | if (mddev->bitmap && mddev->bitmap_info.offset) |
9bd35920 | 6213 | info.state |= (1<<MD_SB_BITMAP_PRESENT); |
ca8895d9 GR |
6214 | if (mddev_is_clustered(mddev)) |
6215 | info.state |= (1<<MD_SB_CLUSTERED); | |
a9f326eb | 6216 | info.active_disks = insync; |
1da177e4 LT |
6217 | info.working_disks = working; |
6218 | info.failed_disks = failed; | |
6219 | info.spare_disks = spare; | |
6220 | ||
6221 | info.layout = mddev->layout; | |
9d8f0363 | 6222 | info.chunk_size = mddev->chunk_sectors << 9; |
1da177e4 LT |
6223 | |
6224 | if (copy_to_user(arg, &info, sizeof(info))) | |
6225 | return -EFAULT; | |
6226 | ||
6227 | return 0; | |
6228 | } | |
6229 | ||
f72ffdd6 | 6230 | static int get_bitmap_file(struct mddev *mddev, void __user * arg) |
32a7627c N |
6231 | { |
6232 | mdu_bitmap_file_t *file = NULL; /* too big for stack allocation */ | |
f4ad3d38 | 6233 | char *ptr; |
4af1a041 | 6234 | int err; |
32a7627c | 6235 | |
b6878d9e | 6236 | file = kzalloc(sizeof(*file), GFP_NOIO); |
32a7627c | 6237 | if (!file) |
4af1a041 | 6238 | return -ENOMEM; |
32a7627c | 6239 | |
4af1a041 N |
6240 | err = 0; |
6241 | spin_lock(&mddev->lock); | |
25eafe1a BR |
6242 | /* bitmap enabled */ |
6243 | if (mddev->bitmap_info.file) { | |
6244 | ptr = file_path(mddev->bitmap_info.file, file->pathname, | |
6245 | sizeof(file->pathname)); | |
6246 | if (IS_ERR(ptr)) | |
6247 | err = PTR_ERR(ptr); | |
6248 | else | |
6249 | memmove(file->pathname, ptr, | |
6250 | sizeof(file->pathname)-(ptr-file->pathname)); | |
6251 | } | |
4af1a041 | 6252 | spin_unlock(&mddev->lock); |
32a7627c | 6253 | |
4af1a041 N |
6254 | if (err == 0 && |
6255 | copy_to_user(arg, file, sizeof(*file))) | |
32a7627c | 6256 | err = -EFAULT; |
4af1a041 | 6257 | |
32a7627c N |
6258 | kfree(file); |
6259 | return err; | |
6260 | } | |
6261 | ||
f72ffdd6 | 6262 | static int get_disk_info(struct mddev *mddev, void __user * arg) |
1da177e4 LT |
6263 | { |
6264 | mdu_disk_info_t info; | |
3cb03002 | 6265 | struct md_rdev *rdev; |
1da177e4 LT |
6266 | |
6267 | if (copy_from_user(&info, arg, sizeof(info))) | |
6268 | return -EFAULT; | |
6269 | ||
1ca69c4b | 6270 | rcu_read_lock(); |
57d051dc | 6271 | rdev = md_find_rdev_nr_rcu(mddev, info.number); |
1da177e4 LT |
6272 | if (rdev) { |
6273 | info.major = MAJOR(rdev->bdev->bd_dev); | |
6274 | info.minor = MINOR(rdev->bdev->bd_dev); | |
6275 | info.raid_disk = rdev->raid_disk; | |
6276 | info.state = 0; | |
b2d444d7 | 6277 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 6278 | info.state |= (1<<MD_DISK_FAULTY); |
b2d444d7 | 6279 | else if (test_bit(In_sync, &rdev->flags)) { |
1da177e4 LT |
6280 | info.state |= (1<<MD_DISK_ACTIVE); |
6281 | info.state |= (1<<MD_DISK_SYNC); | |
6282 | } | |
9efdca16 | 6283 | if (test_bit(Journal, &rdev->flags)) |
bac624f3 | 6284 | info.state |= (1<<MD_DISK_JOURNAL); |
8ddf9efe N |
6285 | if (test_bit(WriteMostly, &rdev->flags)) |
6286 | info.state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
6287 | if (test_bit(FailFast, &rdev->flags)) |
6288 | info.state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 LT |
6289 | } else { |
6290 | info.major = info.minor = 0; | |
6291 | info.raid_disk = -1; | |
6292 | info.state = (1<<MD_DISK_REMOVED); | |
6293 | } | |
1ca69c4b | 6294 | rcu_read_unlock(); |
1da177e4 LT |
6295 | |
6296 | if (copy_to_user(arg, &info, sizeof(info))) | |
6297 | return -EFAULT; | |
6298 | ||
6299 | return 0; | |
6300 | } | |
6301 | ||
f72ffdd6 | 6302 | static int add_new_disk(struct mddev *mddev, mdu_disk_info_t *info) |
1da177e4 LT |
6303 | { |
6304 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 6305 | struct md_rdev *rdev; |
1da177e4 LT |
6306 | dev_t dev = MKDEV(info->major,info->minor); |
6307 | ||
1aee41f6 GR |
6308 | if (mddev_is_clustered(mddev) && |
6309 | !(info->state & ((1 << MD_DISK_CLUSTER_ADD) | (1 << MD_DISK_CANDIDATE)))) { | |
9d48739e N |
6310 | pr_warn("%s: Cannot add to clustered mddev.\n", |
6311 | mdname(mddev)); | |
1aee41f6 GR |
6312 | return -EINVAL; |
6313 | } | |
6314 | ||
1da177e4 LT |
6315 | if (info->major != MAJOR(dev) || info->minor != MINOR(dev)) |
6316 | return -EOVERFLOW; | |
6317 | ||
6318 | if (!mddev->raid_disks) { | |
6319 | int err; | |
6320 | /* expecting a device which has a superblock */ | |
6321 | rdev = md_import_device(dev, mddev->major_version, mddev->minor_version); | |
6322 | if (IS_ERR(rdev)) { | |
9d48739e | 6323 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6324 | PTR_ERR(rdev)); |
6325 | return PTR_ERR(rdev); | |
6326 | } | |
6327 | if (!list_empty(&mddev->disks)) { | |
3cb03002 N |
6328 | struct md_rdev *rdev0 |
6329 | = list_entry(mddev->disks.next, | |
6330 | struct md_rdev, same_set); | |
a9f326eb | 6331 | err = super_types[mddev->major_version] |
1da177e4 LT |
6332 | .load_super(rdev, rdev0, mddev->minor_version); |
6333 | if (err < 0) { | |
9d48739e | 6334 | pr_warn("md: %s has different UUID to %s\n", |
f72ffdd6 | 6335 | bdevname(rdev->bdev,b), |
1da177e4 LT |
6336 | bdevname(rdev0->bdev,b2)); |
6337 | export_rdev(rdev); | |
6338 | return -EINVAL; | |
6339 | } | |
6340 | } | |
6341 | err = bind_rdev_to_array(rdev, mddev); | |
6342 | if (err) | |
6343 | export_rdev(rdev); | |
6344 | return err; | |
6345 | } | |
6346 | ||
6347 | /* | |
6348 | * add_new_disk can be used once the array is assembled | |
6349 | * to add "hot spares". They must already have a superblock | |
6350 | * written | |
6351 | */ | |
6352 | if (mddev->pers) { | |
6353 | int err; | |
6354 | if (!mddev->pers->hot_add_disk) { | |
9d48739e N |
6355 | pr_warn("%s: personality does not support diskops!\n", |
6356 | mdname(mddev)); | |
1da177e4 LT |
6357 | return -EINVAL; |
6358 | } | |
7b1e35f6 N |
6359 | if (mddev->persistent) |
6360 | rdev = md_import_device(dev, mddev->major_version, | |
6361 | mddev->minor_version); | |
6362 | else | |
6363 | rdev = md_import_device(dev, -1, -1); | |
1da177e4 | 6364 | if (IS_ERR(rdev)) { |
9d48739e | 6365 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6366 | PTR_ERR(rdev)); |
6367 | return PTR_ERR(rdev); | |
6368 | } | |
1a855a06 | 6369 | /* set saved_raid_disk if appropriate */ |
41158c7e N |
6370 | if (!mddev->persistent) { |
6371 | if (info->state & (1<<MD_DISK_SYNC) && | |
bf572541 | 6372 | info->raid_disk < mddev->raid_disks) { |
41158c7e | 6373 | rdev->raid_disk = info->raid_disk; |
bf572541 | 6374 | set_bit(In_sync, &rdev->flags); |
8313b8e5 | 6375 | clear_bit(Bitmap_sync, &rdev->flags); |
bf572541 | 6376 | } else |
41158c7e | 6377 | rdev->raid_disk = -1; |
f466722c | 6378 | rdev->saved_raid_disk = rdev->raid_disk; |
41158c7e N |
6379 | } else |
6380 | super_types[mddev->major_version]. | |
6381 | validate_super(mddev, rdev); | |
bedd86b7 | 6382 | if ((info->state & (1<<MD_DISK_SYNC)) && |
f4563091 | 6383 | rdev->raid_disk != info->raid_disk) { |
bedd86b7 N |
6384 | /* This was a hot-add request, but events doesn't |
6385 | * match, so reject it. | |
6386 | */ | |
6387 | export_rdev(rdev); | |
6388 | return -EINVAL; | |
6389 | } | |
6390 | ||
b2d444d7 | 6391 | clear_bit(In_sync, &rdev->flags); /* just to be sure */ |
8ddf9efe N |
6392 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6393 | set_bit(WriteMostly, &rdev->flags); | |
575a80fa N |
6394 | else |
6395 | clear_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6396 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6397 | set_bit(FailFast, &rdev->flags); | |
6398 | else | |
6399 | clear_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6400 | |
f6b6ec5c SL |
6401 | if (info->state & (1<<MD_DISK_JOURNAL)) { |
6402 | struct md_rdev *rdev2; | |
6403 | bool has_journal = false; | |
6404 | ||
6405 | /* make sure no existing journal disk */ | |
6406 | rdev_for_each(rdev2, mddev) { | |
6407 | if (test_bit(Journal, &rdev2->flags)) { | |
6408 | has_journal = true; | |
6409 | break; | |
6410 | } | |
6411 | } | |
230b55fa | 6412 | if (has_journal || mddev->bitmap) { |
f6b6ec5c SL |
6413 | export_rdev(rdev); |
6414 | return -EBUSY; | |
6415 | } | |
bac624f3 | 6416 | set_bit(Journal, &rdev->flags); |
f6b6ec5c | 6417 | } |
1aee41f6 GR |
6418 | /* |
6419 | * check whether the device shows up in other nodes | |
6420 | */ | |
6421 | if (mddev_is_clustered(mddev)) { | |
dbb64f86 | 6422 | if (info->state & (1 << MD_DISK_CANDIDATE)) |
1aee41f6 | 6423 | set_bit(Candidate, &rdev->flags); |
dbb64f86 | 6424 | else if (info->state & (1 << MD_DISK_CLUSTER_ADD)) { |
1aee41f6 | 6425 | /* --add initiated by this node */ |
dbb64f86 | 6426 | err = md_cluster_ops->add_new_disk(mddev, rdev); |
1aee41f6 | 6427 | if (err) { |
1aee41f6 GR |
6428 | export_rdev(rdev); |
6429 | return err; | |
6430 | } | |
6431 | } | |
6432 | } | |
6433 | ||
1da177e4 LT |
6434 | rdev->raid_disk = -1; |
6435 | err = bind_rdev_to_array(rdev, mddev); | |
dbb64f86 | 6436 | |
1da177e4 LT |
6437 | if (err) |
6438 | export_rdev(rdev); | |
dbb64f86 GR |
6439 | |
6440 | if (mddev_is_clustered(mddev)) { | |
e566aef1 GJ |
6441 | if (info->state & (1 << MD_DISK_CANDIDATE)) { |
6442 | if (!err) { | |
6443 | err = md_cluster_ops->new_disk_ack(mddev, | |
6444 | err == 0); | |
6445 | if (err) | |
6446 | md_kick_rdev_from_array(rdev); | |
6447 | } | |
6448 | } else { | |
dbb64f86 GR |
6449 | if (err) |
6450 | md_cluster_ops->add_new_disk_cancel(mddev); | |
6451 | else | |
6452 | err = add_bound_rdev(rdev); | |
6453 | } | |
6454 | ||
6455 | } else if (!err) | |
a6da4ef8 | 6456 | err = add_bound_rdev(rdev); |
dbb64f86 | 6457 | |
1da177e4 LT |
6458 | return err; |
6459 | } | |
6460 | ||
6461 | /* otherwise, add_new_disk is only allowed | |
6462 | * for major_version==0 superblocks | |
6463 | */ | |
6464 | if (mddev->major_version != 0) { | |
9d48739e | 6465 | pr_warn("%s: ADD_NEW_DISK not supported\n", mdname(mddev)); |
1da177e4 LT |
6466 | return -EINVAL; |
6467 | } | |
6468 | ||
6469 | if (!(info->state & (1<<MD_DISK_FAULTY))) { | |
6470 | int err; | |
d710e138 | 6471 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6472 | if (IS_ERR(rdev)) { |
9d48739e | 6473 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6474 | PTR_ERR(rdev)); |
6475 | return PTR_ERR(rdev); | |
6476 | } | |
6477 | rdev->desc_nr = info->number; | |
6478 | if (info->raid_disk < mddev->raid_disks) | |
6479 | rdev->raid_disk = info->raid_disk; | |
6480 | else | |
6481 | rdev->raid_disk = -1; | |
6482 | ||
1da177e4 | 6483 | if (rdev->raid_disk < mddev->raid_disks) |
b2d444d7 N |
6484 | if (info->state & (1<<MD_DISK_SYNC)) |
6485 | set_bit(In_sync, &rdev->flags); | |
1da177e4 | 6486 | |
8ddf9efe N |
6487 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6488 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6489 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6490 | set_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6491 | |
1da177e4 | 6492 | if (!mddev->persistent) { |
9d48739e | 6493 | pr_debug("md: nonpersistent superblock ...\n"); |
77304d2a MS |
6494 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
6495 | } else | |
57b2caa3 | 6496 | rdev->sb_start = calc_dev_sboffset(rdev); |
8190e754 | 6497 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6498 | |
2bf071bf N |
6499 | err = bind_rdev_to_array(rdev, mddev); |
6500 | if (err) { | |
6501 | export_rdev(rdev); | |
6502 | return err; | |
6503 | } | |
1da177e4 LT |
6504 | } |
6505 | ||
6506 | return 0; | |
6507 | } | |
6508 | ||
f72ffdd6 | 6509 | static int hot_remove_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6510 | { |
6511 | char b[BDEVNAME_SIZE]; | |
3cb03002 | 6512 | struct md_rdev *rdev; |
1da177e4 | 6513 | |
85dd2a28 YY |
6514 | if (!mddev->pers) |
6515 | return -ENODEV; | |
6516 | ||
1da177e4 LT |
6517 | rdev = find_rdev(mddev, dev); |
6518 | if (!rdev) | |
6519 | return -ENXIO; | |
6520 | ||
2910ff17 GR |
6521 | if (rdev->raid_disk < 0) |
6522 | goto kick_rdev; | |
293467aa | 6523 | |
3ea8929d N |
6524 | clear_bit(Blocked, &rdev->flags); |
6525 | remove_and_add_spares(mddev, rdev); | |
6526 | ||
1da177e4 LT |
6527 | if (rdev->raid_disk >= 0) |
6528 | goto busy; | |
6529 | ||
2910ff17 | 6530 | kick_rdev: |
54a88392 | 6531 | if (mddev_is_clustered(mddev)) |
88bcfef7 GR |
6532 | md_cluster_ops->remove_disk(mddev, rdev); |
6533 | ||
fb56dfef | 6534 | md_kick_rdev_from_array(rdev); |
2953079c | 6535 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6536 | if (mddev->thread) |
6537 | md_wakeup_thread(mddev->thread); | |
6538 | else | |
6539 | md_update_sb(mddev, 1); | |
d7603b7e | 6540 | md_new_event(mddev); |
1da177e4 LT |
6541 | |
6542 | return 0; | |
6543 | busy: | |
9d48739e N |
6544 | pr_debug("md: cannot remove active disk %s from %s ...\n", |
6545 | bdevname(rdev->bdev,b), mdname(mddev)); | |
1da177e4 LT |
6546 | return -EBUSY; |
6547 | } | |
6548 | ||
f72ffdd6 | 6549 | static int hot_add_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6550 | { |
6551 | char b[BDEVNAME_SIZE]; | |
6552 | int err; | |
3cb03002 | 6553 | struct md_rdev *rdev; |
1da177e4 LT |
6554 | |
6555 | if (!mddev->pers) | |
6556 | return -ENODEV; | |
6557 | ||
6558 | if (mddev->major_version != 0) { | |
9d48739e | 6559 | pr_warn("%s: HOT_ADD may only be used with version-0 superblocks.\n", |
1da177e4 LT |
6560 | mdname(mddev)); |
6561 | return -EINVAL; | |
6562 | } | |
6563 | if (!mddev->pers->hot_add_disk) { | |
9d48739e | 6564 | pr_warn("%s: personality does not support diskops!\n", |
1da177e4 LT |
6565 | mdname(mddev)); |
6566 | return -EINVAL; | |
6567 | } | |
6568 | ||
d710e138 | 6569 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6570 | if (IS_ERR(rdev)) { |
9d48739e | 6571 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6572 | PTR_ERR(rdev)); |
6573 | return -EINVAL; | |
6574 | } | |
6575 | ||
6576 | if (mddev->persistent) | |
57b2caa3 | 6577 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 6578 | else |
77304d2a | 6579 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
1da177e4 | 6580 | |
8190e754 | 6581 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6582 | |
b2d444d7 | 6583 | if (test_bit(Faulty, &rdev->flags)) { |
9d48739e | 6584 | pr_warn("md: can not hot-add faulty %s disk to %s!\n", |
1da177e4 LT |
6585 | bdevname(rdev->bdev,b), mdname(mddev)); |
6586 | err = -EINVAL; | |
6587 | goto abort_export; | |
6588 | } | |
293467aa | 6589 | |
b2d444d7 | 6590 | clear_bit(In_sync, &rdev->flags); |
1da177e4 | 6591 | rdev->desc_nr = -1; |
5842730d | 6592 | rdev->saved_raid_disk = -1; |
2bf071bf N |
6593 | err = bind_rdev_to_array(rdev, mddev); |
6594 | if (err) | |
2aa82191 | 6595 | goto abort_export; |
1da177e4 LT |
6596 | |
6597 | /* | |
6598 | * The rest should better be atomic, we can have disk failures | |
6599 | * noticed in interrupt contexts ... | |
6600 | */ | |
6601 | ||
1da177e4 LT |
6602 | rdev->raid_disk = -1; |
6603 | ||
2953079c | 6604 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6605 | if (!mddev->thread) |
6606 | md_update_sb(mddev, 1); | |
1da177e4 LT |
6607 | /* |
6608 | * Kick recovery, maybe this spare has to be added to the | |
6609 | * array immediately. | |
6610 | */ | |
6611 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6612 | md_wakeup_thread(mddev->thread); | |
d7603b7e | 6613 | md_new_event(mddev); |
1da177e4 LT |
6614 | return 0; |
6615 | ||
1da177e4 LT |
6616 | abort_export: |
6617 | export_rdev(rdev); | |
6618 | return err; | |
6619 | } | |
6620 | ||
fd01b88c | 6621 | static int set_bitmap_file(struct mddev *mddev, int fd) |
32a7627c | 6622 | { |
035328c2 | 6623 | int err = 0; |
32a7627c | 6624 | |
36fa3063 | 6625 | if (mddev->pers) { |
d66b1b39 | 6626 | if (!mddev->pers->quiesce || !mddev->thread) |
36fa3063 N |
6627 | return -EBUSY; |
6628 | if (mddev->recovery || mddev->sync_thread) | |
6629 | return -EBUSY; | |
6630 | /* we should be able to change the bitmap.. */ | |
6631 | } | |
32a7627c | 6632 | |
36fa3063 | 6633 | if (fd >= 0) { |
035328c2 | 6634 | struct inode *inode; |
1e594bb2 N |
6635 | struct file *f; |
6636 | ||
6637 | if (mddev->bitmap || mddev->bitmap_info.file) | |
36fa3063 | 6638 | return -EEXIST; /* cannot add when bitmap is present */ |
1e594bb2 | 6639 | f = fget(fd); |
32a7627c | 6640 | |
1e594bb2 | 6641 | if (f == NULL) { |
9d48739e N |
6642 | pr_warn("%s: error: failed to get bitmap file\n", |
6643 | mdname(mddev)); | |
36fa3063 N |
6644 | return -EBADF; |
6645 | } | |
6646 | ||
1e594bb2 | 6647 | inode = f->f_mapping->host; |
035328c2 | 6648 | if (!S_ISREG(inode->i_mode)) { |
9d48739e N |
6649 | pr_warn("%s: error: bitmap file must be a regular file\n", |
6650 | mdname(mddev)); | |
035328c2 | 6651 | err = -EBADF; |
1e594bb2 | 6652 | } else if (!(f->f_mode & FMODE_WRITE)) { |
9d48739e N |
6653 | pr_warn("%s: error: bitmap file must open for write\n", |
6654 | mdname(mddev)); | |
035328c2 N |
6655 | err = -EBADF; |
6656 | } else if (atomic_read(&inode->i_writecount) != 1) { | |
9d48739e N |
6657 | pr_warn("%s: error: bitmap file is already in use\n", |
6658 | mdname(mddev)); | |
035328c2 N |
6659 | err = -EBUSY; |
6660 | } | |
6661 | if (err) { | |
1e594bb2 | 6662 | fput(f); |
36fa3063 N |
6663 | return err; |
6664 | } | |
1e594bb2 | 6665 | mddev->bitmap_info.file = f; |
c3d9714e | 6666 | mddev->bitmap_info.offset = 0; /* file overrides offset */ |
36fa3063 N |
6667 | } else if (mddev->bitmap == NULL) |
6668 | return -ENOENT; /* cannot remove what isn't there */ | |
6669 | err = 0; | |
6670 | if (mddev->pers) { | |
69e51b44 | 6671 | if (fd >= 0) { |
f9209a32 GR |
6672 | struct bitmap *bitmap; |
6673 | ||
6674 | bitmap = bitmap_create(mddev, -1); | |
9e1cc0a5 | 6675 | mddev_suspend(mddev); |
f9209a32 GR |
6676 | if (!IS_ERR(bitmap)) { |
6677 | mddev->bitmap = bitmap; | |
69e51b44 | 6678 | err = bitmap_load(mddev); |
ba599aca N |
6679 | } else |
6680 | err = PTR_ERR(bitmap); | |
52a0d49d N |
6681 | if (err) { |
6682 | bitmap_destroy(mddev); | |
6683 | fd = -1; | |
6684 | } | |
9e1cc0a5 | 6685 | mddev_resume(mddev); |
52a0d49d | 6686 | } else if (fd < 0) { |
9e1cc0a5 | 6687 | mddev_suspend(mddev); |
36fa3063 | 6688 | bitmap_destroy(mddev); |
9e1cc0a5 | 6689 | mddev_resume(mddev); |
d7375ab3 | 6690 | } |
d7375ab3 N |
6691 | } |
6692 | if (fd < 0) { | |
4af1a041 N |
6693 | struct file *f = mddev->bitmap_info.file; |
6694 | if (f) { | |
6695 | spin_lock(&mddev->lock); | |
6696 | mddev->bitmap_info.file = NULL; | |
6697 | spin_unlock(&mddev->lock); | |
6698 | fput(f); | |
6699 | } | |
36fa3063 N |
6700 | } |
6701 | ||
32a7627c N |
6702 | return err; |
6703 | } | |
6704 | ||
1da177e4 LT |
6705 | /* |
6706 | * set_array_info is used two different ways | |
6707 | * The original usage is when creating a new array. | |
6708 | * In this usage, raid_disks is > 0 and it together with | |
6709 | * level, size, not_persistent,layout,chunksize determine the | |
6710 | * shape of the array. | |
6711 | * This will always create an array with a type-0.90.0 superblock. | |
6712 | * The newer usage is when assembling an array. | |
6713 | * In this case raid_disks will be 0, and the major_version field is | |
6714 | * use to determine which style super-blocks are to be found on the devices. | |
6715 | * The minor and patch _version numbers are also kept incase the | |
6716 | * super_block handler wishes to interpret them. | |
6717 | */ | |
f72ffdd6 | 6718 | static int set_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
6719 | { |
6720 | ||
6721 | if (info->raid_disks == 0) { | |
6722 | /* just setting version number for superblock loading */ | |
6723 | if (info->major_version < 0 || | |
50511da3 | 6724 | info->major_version >= ARRAY_SIZE(super_types) || |
1da177e4 LT |
6725 | super_types[info->major_version].name == NULL) { |
6726 | /* maybe try to auto-load a module? */ | |
9d48739e | 6727 | pr_warn("md: superblock version %d not known\n", |
1da177e4 LT |
6728 | info->major_version); |
6729 | return -EINVAL; | |
6730 | } | |
6731 | mddev->major_version = info->major_version; | |
6732 | mddev->minor_version = info->minor_version; | |
6733 | mddev->patch_version = info->patch_version; | |
3f9d7b0d | 6734 | mddev->persistent = !info->not_persistent; |
cbd19983 N |
6735 | /* ensure mddev_put doesn't delete this now that there |
6736 | * is some minimal configuration. | |
6737 | */ | |
9ebc6ef1 | 6738 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
6739 | return 0; |
6740 | } | |
6741 | mddev->major_version = MD_MAJOR_VERSION; | |
6742 | mddev->minor_version = MD_MINOR_VERSION; | |
6743 | mddev->patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6744 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
6745 | |
6746 | mddev->level = info->level; | |
17115e03 | 6747 | mddev->clevel[0] = 0; |
58c0fed4 | 6748 | mddev->dev_sectors = 2 * (sector_t)info->size; |
1da177e4 LT |
6749 | mddev->raid_disks = info->raid_disks; |
6750 | /* don't set md_minor, it is determined by which /dev/md* was | |
6751 | * openned | |
6752 | */ | |
6753 | if (info->state & (1<<MD_SB_CLEAN)) | |
6754 | mddev->recovery_cp = MaxSector; | |
6755 | else | |
6756 | mddev->recovery_cp = 0; | |
6757 | mddev->persistent = ! info->not_persistent; | |
e691063a | 6758 | mddev->external = 0; |
1da177e4 LT |
6759 | |
6760 | mddev->layout = info->layout; | |
9d8f0363 | 6761 | mddev->chunk_sectors = info->chunk_size >> 9; |
1da177e4 | 6762 | |
2953079c | 6763 | if (mddev->persistent) { |
1b3bae49 N |
6764 | mddev->max_disks = MD_SB_DISKS; |
6765 | mddev->flags = 0; | |
6766 | mddev->sb_flags = 0; | |
2953079c SL |
6767 | } |
6768 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
1da177e4 | 6769 | |
c3d9714e | 6770 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 6771 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
c3d9714e | 6772 | mddev->bitmap_info.offset = 0; |
b2a2703c | 6773 | |
f6705578 N |
6774 | mddev->reshape_position = MaxSector; |
6775 | ||
1da177e4 LT |
6776 | /* |
6777 | * Generate a 128 bit UUID | |
6778 | */ | |
6779 | get_random_bytes(mddev->uuid, 16); | |
6780 | ||
f6705578 | 6781 | mddev->new_level = mddev->level; |
664e7c41 | 6782 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
6783 | mddev->new_layout = mddev->layout; |
6784 | mddev->delta_disks = 0; | |
2c810cdd | 6785 | mddev->reshape_backwards = 0; |
f6705578 | 6786 | |
1da177e4 LT |
6787 | return 0; |
6788 | } | |
6789 | ||
fd01b88c | 6790 | void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors) |
1f403624 | 6791 | { |
efa4b77b | 6792 | lockdep_assert_held(&mddev->reconfig_mutex); |
b522adcd DW |
6793 | |
6794 | if (mddev->external_size) | |
6795 | return; | |
6796 | ||
1f403624 DW |
6797 | mddev->array_sectors = array_sectors; |
6798 | } | |
6799 | EXPORT_SYMBOL(md_set_array_sectors); | |
6800 | ||
fd01b88c | 6801 | static int update_size(struct mddev *mddev, sector_t num_sectors) |
a35b0d69 | 6802 | { |
3cb03002 | 6803 | struct md_rdev *rdev; |
a35b0d69 | 6804 | int rv; |
d71f9f88 | 6805 | int fit = (num_sectors == 0); |
818da59f | 6806 | sector_t old_dev_sectors = mddev->dev_sectors; |
ab5a98b1 | 6807 | |
a35b0d69 N |
6808 | if (mddev->pers->resize == NULL) |
6809 | return -EINVAL; | |
d71f9f88 AN |
6810 | /* The "num_sectors" is the number of sectors of each device that |
6811 | * is used. This can only make sense for arrays with redundancy. | |
6812 | * linear and raid0 always use whatever space is available. We can only | |
6813 | * consider changing this number if no resync or reconstruction is | |
6814 | * happening, and if the new size is acceptable. It must fit before the | |
0f420358 | 6815 | * sb_start or, if that is <data_offset, it must fit before the size |
d71f9f88 AN |
6816 | * of each device. If num_sectors is zero, we find the largest size |
6817 | * that fits. | |
a35b0d69 | 6818 | */ |
f851b60d N |
6819 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
6820 | mddev->sync_thread) | |
a35b0d69 | 6821 | return -EBUSY; |
bd8839e0 N |
6822 | if (mddev->ro) |
6823 | return -EROFS; | |
a4a6125a | 6824 | |
dafb20fa | 6825 | rdev_for_each(rdev, mddev) { |
dd8ac336 | 6826 | sector_t avail = rdev->sectors; |
01ab5662 | 6827 | |
d71f9f88 AN |
6828 | if (fit && (num_sectors == 0 || num_sectors > avail)) |
6829 | num_sectors = avail; | |
6830 | if (avail < num_sectors) | |
a35b0d69 N |
6831 | return -ENOSPC; |
6832 | } | |
d71f9f88 | 6833 | rv = mddev->pers->resize(mddev, num_sectors); |
c9483634 | 6834 | if (!rv) { |
818da59f GJ |
6835 | if (mddev_is_clustered(mddev)) |
6836 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
6837 | else if (mddev->queue) { | |
c9483634 GJ |
6838 | set_capacity(mddev->gendisk, mddev->array_sectors); |
6839 | revalidate_disk(mddev->gendisk); | |
6840 | } | |
6841 | } | |
a35b0d69 N |
6842 | return rv; |
6843 | } | |
6844 | ||
fd01b88c | 6845 | static int update_raid_disks(struct mddev *mddev, int raid_disks) |
da943b99 N |
6846 | { |
6847 | int rv; | |
c6563a8c | 6848 | struct md_rdev *rdev; |
da943b99 | 6849 | /* change the number of raid disks */ |
63c70c4f | 6850 | if (mddev->pers->check_reshape == NULL) |
da943b99 | 6851 | return -EINVAL; |
bd8839e0 N |
6852 | if (mddev->ro) |
6853 | return -EROFS; | |
da943b99 | 6854 | if (raid_disks <= 0 || |
233fca36 | 6855 | (mddev->max_disks && raid_disks >= mddev->max_disks)) |
da943b99 | 6856 | return -EINVAL; |
f851b60d N |
6857 | if (mddev->sync_thread || |
6858 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || | |
6859 | mddev->reshape_position != MaxSector) | |
da943b99 | 6860 | return -EBUSY; |
c6563a8c N |
6861 | |
6862 | rdev_for_each(rdev, mddev) { | |
6863 | if (mddev->raid_disks < raid_disks && | |
6864 | rdev->data_offset < rdev->new_data_offset) | |
6865 | return -EINVAL; | |
6866 | if (mddev->raid_disks > raid_disks && | |
6867 | rdev->data_offset > rdev->new_data_offset) | |
6868 | return -EINVAL; | |
6869 | } | |
6870 | ||
63c70c4f | 6871 | mddev->delta_disks = raid_disks - mddev->raid_disks; |
2c810cdd N |
6872 | if (mddev->delta_disks < 0) |
6873 | mddev->reshape_backwards = 1; | |
6874 | else if (mddev->delta_disks > 0) | |
6875 | mddev->reshape_backwards = 0; | |
63c70c4f N |
6876 | |
6877 | rv = mddev->pers->check_reshape(mddev); | |
2c810cdd | 6878 | if (rv < 0) { |
de171cb9 | 6879 | mddev->delta_disks = 0; |
2c810cdd N |
6880 | mddev->reshape_backwards = 0; |
6881 | } | |
da943b99 N |
6882 | return rv; |
6883 | } | |
6884 | ||
1da177e4 LT |
6885 | /* |
6886 | * update_array_info is used to change the configuration of an | |
6887 | * on-line array. | |
6888 | * The version, ctime,level,size,raid_disks,not_persistent, layout,chunk_size | |
6889 | * fields in the info are checked against the array. | |
6890 | * Any differences that cannot be handled will cause an error. | |
6891 | * Normally, only one change can be managed at a time. | |
6892 | */ | |
fd01b88c | 6893 | static int update_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
6894 | { |
6895 | int rv = 0; | |
6896 | int cnt = 0; | |
36fa3063 N |
6897 | int state = 0; |
6898 | ||
6899 | /* calculate expected state,ignoring low bits */ | |
c3d9714e | 6900 | if (mddev->bitmap && mddev->bitmap_info.offset) |
36fa3063 | 6901 | state |= (1 << MD_SB_BITMAP_PRESENT); |
1da177e4 LT |
6902 | |
6903 | if (mddev->major_version != info->major_version || | |
6904 | mddev->minor_version != info->minor_version || | |
6905 | /* mddev->patch_version != info->patch_version || */ | |
6906 | mddev->ctime != info->ctime || | |
6907 | mddev->level != info->level || | |
6908 | /* mddev->layout != info->layout || */ | |
4e023612 | 6909 | mddev->persistent != !info->not_persistent || |
9d8f0363 | 6910 | mddev->chunk_sectors != info->chunk_size >> 9 || |
36fa3063 N |
6911 | /* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */ |
6912 | ((state^info->state) & 0xfffffe00) | |
6913 | ) | |
1da177e4 LT |
6914 | return -EINVAL; |
6915 | /* Check there is only one change */ | |
58c0fed4 AN |
6916 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
6917 | cnt++; | |
6918 | if (mddev->raid_disks != info->raid_disks) | |
6919 | cnt++; | |
6920 | if (mddev->layout != info->layout) | |
6921 | cnt++; | |
6922 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) | |
6923 | cnt++; | |
6924 | if (cnt == 0) | |
6925 | return 0; | |
6926 | if (cnt > 1) | |
6927 | return -EINVAL; | |
1da177e4 LT |
6928 | |
6929 | if (mddev->layout != info->layout) { | |
6930 | /* Change layout | |
6931 | * we don't need to do anything at the md level, the | |
6932 | * personality will take care of it all. | |
6933 | */ | |
50ac168a | 6934 | if (mddev->pers->check_reshape == NULL) |
1da177e4 | 6935 | return -EINVAL; |
597a711b N |
6936 | else { |
6937 | mddev->new_layout = info->layout; | |
50ac168a | 6938 | rv = mddev->pers->check_reshape(mddev); |
597a711b N |
6939 | if (rv) |
6940 | mddev->new_layout = mddev->layout; | |
6941 | return rv; | |
6942 | } | |
1da177e4 | 6943 | } |
58c0fed4 | 6944 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
d71f9f88 | 6945 | rv = update_size(mddev, (sector_t)info->size * 2); |
a35b0d69 | 6946 | |
da943b99 N |
6947 | if (mddev->raid_disks != info->raid_disks) |
6948 | rv = update_raid_disks(mddev, info->raid_disks); | |
6949 | ||
36fa3063 | 6950 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) { |
293467aa GR |
6951 | if (mddev->pers->quiesce == NULL || mddev->thread == NULL) { |
6952 | rv = -EINVAL; | |
6953 | goto err; | |
6954 | } | |
6955 | if (mddev->recovery || mddev->sync_thread) { | |
6956 | rv = -EBUSY; | |
6957 | goto err; | |
6958 | } | |
36fa3063 | 6959 | if (info->state & (1<<MD_SB_BITMAP_PRESENT)) { |
f9209a32 | 6960 | struct bitmap *bitmap; |
36fa3063 | 6961 | /* add the bitmap */ |
293467aa GR |
6962 | if (mddev->bitmap) { |
6963 | rv = -EEXIST; | |
6964 | goto err; | |
6965 | } | |
6966 | if (mddev->bitmap_info.default_offset == 0) { | |
6967 | rv = -EINVAL; | |
6968 | goto err; | |
6969 | } | |
c3d9714e N |
6970 | mddev->bitmap_info.offset = |
6971 | mddev->bitmap_info.default_offset; | |
6409bb05 N |
6972 | mddev->bitmap_info.space = |
6973 | mddev->bitmap_info.default_space; | |
f9209a32 | 6974 | bitmap = bitmap_create(mddev, -1); |
9e1cc0a5 | 6975 | mddev_suspend(mddev); |
f9209a32 GR |
6976 | if (!IS_ERR(bitmap)) { |
6977 | mddev->bitmap = bitmap; | |
69e51b44 | 6978 | rv = bitmap_load(mddev); |
ba599aca N |
6979 | } else |
6980 | rv = PTR_ERR(bitmap); | |
36fa3063 N |
6981 | if (rv) |
6982 | bitmap_destroy(mddev); | |
9e1cc0a5 | 6983 | mddev_resume(mddev); |
36fa3063 N |
6984 | } else { |
6985 | /* remove the bitmap */ | |
293467aa GR |
6986 | if (!mddev->bitmap) { |
6987 | rv = -ENOENT; | |
6988 | goto err; | |
6989 | } | |
6990 | if (mddev->bitmap->storage.file) { | |
6991 | rv = -EINVAL; | |
6992 | goto err; | |
6993 | } | |
f6a2dc64 GJ |
6994 | if (mddev->bitmap_info.nodes) { |
6995 | /* hold PW on all the bitmap lock */ | |
6996 | if (md_cluster_ops->lock_all_bitmaps(mddev) <= 0) { | |
9d48739e | 6997 | pr_warn("md: can't change bitmap to none since the array is in use by more than one node\n"); |
f6a2dc64 GJ |
6998 | rv = -EPERM; |
6999 | md_cluster_ops->unlock_all_bitmaps(mddev); | |
7000 | goto err; | |
7001 | } | |
7002 | ||
7003 | mddev->bitmap_info.nodes = 0; | |
7004 | md_cluster_ops->leave(mddev); | |
7005 | } | |
9e1cc0a5 | 7006 | mddev_suspend(mddev); |
36fa3063 | 7007 | bitmap_destroy(mddev); |
9e1cc0a5 | 7008 | mddev_resume(mddev); |
c3d9714e | 7009 | mddev->bitmap_info.offset = 0; |
36fa3063 N |
7010 | } |
7011 | } | |
850b2b42 | 7012 | md_update_sb(mddev, 1); |
293467aa GR |
7013 | return rv; |
7014 | err: | |
1da177e4 LT |
7015 | return rv; |
7016 | } | |
7017 | ||
fd01b88c | 7018 | static int set_disk_faulty(struct mddev *mddev, dev_t dev) |
1da177e4 | 7019 | { |
3cb03002 | 7020 | struct md_rdev *rdev; |
1ca69c4b | 7021 | int err = 0; |
1da177e4 LT |
7022 | |
7023 | if (mddev->pers == NULL) | |
7024 | return -ENODEV; | |
7025 | ||
1ca69c4b N |
7026 | rcu_read_lock(); |
7027 | rdev = find_rdev_rcu(mddev, dev); | |
1da177e4 | 7028 | if (!rdev) |
1ca69c4b N |
7029 | err = -ENODEV; |
7030 | else { | |
7031 | md_error(mddev, rdev); | |
7032 | if (!test_bit(Faulty, &rdev->flags)) | |
7033 | err = -EBUSY; | |
7034 | } | |
7035 | rcu_read_unlock(); | |
7036 | return err; | |
1da177e4 LT |
7037 | } |
7038 | ||
2f9618ce AN |
7039 | /* |
7040 | * We have a problem here : there is no easy way to give a CHS | |
7041 | * virtual geometry. We currently pretend that we have a 2 heads | |
7042 | * 4 sectors (with a BIG number of cylinders...). This drives | |
7043 | * dosfs just mad... ;-) | |
7044 | */ | |
a885c8c4 CH |
7045 | static int md_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
7046 | { | |
fd01b88c | 7047 | struct mddev *mddev = bdev->bd_disk->private_data; |
a885c8c4 CH |
7048 | |
7049 | geo->heads = 2; | |
7050 | geo->sectors = 4; | |
49ce6cea | 7051 | geo->cylinders = mddev->array_sectors / 8; |
a885c8c4 CH |
7052 | return 0; |
7053 | } | |
7054 | ||
cb335f88 NS |
7055 | static inline bool md_ioctl_valid(unsigned int cmd) |
7056 | { | |
7057 | switch (cmd) { | |
7058 | case ADD_NEW_DISK: | |
7059 | case BLKROSET: | |
7060 | case GET_ARRAY_INFO: | |
7061 | case GET_BITMAP_FILE: | |
7062 | case GET_DISK_INFO: | |
7063 | case HOT_ADD_DISK: | |
7064 | case HOT_REMOVE_DISK: | |
cb335f88 NS |
7065 | case RAID_AUTORUN: |
7066 | case RAID_VERSION: | |
7067 | case RESTART_ARRAY_RW: | |
7068 | case RUN_ARRAY: | |
7069 | case SET_ARRAY_INFO: | |
7070 | case SET_BITMAP_FILE: | |
7071 | case SET_DISK_FAULTY: | |
7072 | case STOP_ARRAY: | |
7073 | case STOP_ARRAY_RO: | |
1aee41f6 | 7074 | case CLUSTERED_DISK_NACK: |
cb335f88 NS |
7075 | return true; |
7076 | default: | |
7077 | return false; | |
7078 | } | |
7079 | } | |
7080 | ||
a39907fa | 7081 | static int md_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
7082 | unsigned int cmd, unsigned long arg) |
7083 | { | |
7084 | int err = 0; | |
7085 | void __user *argp = (void __user *)arg; | |
fd01b88c | 7086 | struct mddev *mddev = NULL; |
e2218350 | 7087 | int ro; |
065e519e | 7088 | bool did_set_md_closing = false; |
1da177e4 | 7089 | |
cb335f88 NS |
7090 | if (!md_ioctl_valid(cmd)) |
7091 | return -ENOTTY; | |
7092 | ||
506c9e44 N |
7093 | switch (cmd) { |
7094 | case RAID_VERSION: | |
7095 | case GET_ARRAY_INFO: | |
7096 | case GET_DISK_INFO: | |
7097 | break; | |
7098 | default: | |
7099 | if (!capable(CAP_SYS_ADMIN)) | |
7100 | return -EACCES; | |
7101 | } | |
1da177e4 LT |
7102 | |
7103 | /* | |
7104 | * Commands dealing with the RAID driver but not any | |
7105 | * particular array: | |
7106 | */ | |
c02c0aeb N |
7107 | switch (cmd) { |
7108 | case RAID_VERSION: | |
7109 | err = get_version(argp); | |
3adc28d8 | 7110 | goto out; |
1da177e4 | 7111 | |
1da177e4 | 7112 | #ifndef MODULE |
c02c0aeb N |
7113 | case RAID_AUTORUN: |
7114 | err = 0; | |
7115 | autostart_arrays(arg); | |
3adc28d8 | 7116 | goto out; |
1da177e4 | 7117 | #endif |
c02c0aeb | 7118 | default:; |
1da177e4 LT |
7119 | } |
7120 | ||
7121 | /* | |
7122 | * Commands creating/starting a new array: | |
7123 | */ | |
7124 | ||
a39907fa | 7125 | mddev = bdev->bd_disk->private_data; |
1da177e4 LT |
7126 | |
7127 | if (!mddev) { | |
7128 | BUG(); | |
3adc28d8 | 7129 | goto out; |
1da177e4 LT |
7130 | } |
7131 | ||
1ca69c4b N |
7132 | /* Some actions do not requires the mutex */ |
7133 | switch (cmd) { | |
7134 | case GET_ARRAY_INFO: | |
7135 | if (!mddev->raid_disks && !mddev->external) | |
7136 | err = -ENODEV; | |
7137 | else | |
7138 | err = get_array_info(mddev, argp); | |
3adc28d8 | 7139 | goto out; |
1ca69c4b N |
7140 | |
7141 | case GET_DISK_INFO: | |
7142 | if (!mddev->raid_disks && !mddev->external) | |
7143 | err = -ENODEV; | |
7144 | else | |
7145 | err = get_disk_info(mddev, argp); | |
3adc28d8 | 7146 | goto out; |
1ca69c4b N |
7147 | |
7148 | case SET_DISK_FAULTY: | |
7149 | err = set_disk_faulty(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7150 | goto out; |
4af1a041 N |
7151 | |
7152 | case GET_BITMAP_FILE: | |
7153 | err = get_bitmap_file(mddev, argp); | |
7154 | goto out; | |
7155 | ||
1ca69c4b N |
7156 | } |
7157 | ||
a7a3f08d N |
7158 | if (cmd == ADD_NEW_DISK) |
7159 | /* need to ensure md_delayed_delete() has completed */ | |
7160 | flush_workqueue(md_misc_wq); | |
7161 | ||
90f5f7ad HR |
7162 | if (cmd == HOT_REMOVE_DISK) |
7163 | /* need to ensure recovery thread has run */ | |
7164 | wait_event_interruptible_timeout(mddev->sb_wait, | |
7165 | !test_bit(MD_RECOVERY_NEEDED, | |
82a301cb | 7166 | &mddev->recovery), |
90f5f7ad | 7167 | msecs_to_jiffies(5000)); |
260fa034 N |
7168 | if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) { |
7169 | /* Need to flush page cache, and ensure no-one else opens | |
7170 | * and writes | |
7171 | */ | |
7172 | mutex_lock(&mddev->open_mutex); | |
9ba3b7f5 | 7173 | if (mddev->pers && atomic_read(&mddev->openers) > 1) { |
260fa034 N |
7174 | mutex_unlock(&mddev->open_mutex); |
7175 | err = -EBUSY; | |
3adc28d8 | 7176 | goto out; |
260fa034 | 7177 | } |
065e519e | 7178 | WARN_ON_ONCE(test_bit(MD_CLOSING, &mddev->flags)); |
af8d8e6f | 7179 | set_bit(MD_CLOSING, &mddev->flags); |
065e519e | 7180 | did_set_md_closing = true; |
260fa034 N |
7181 | mutex_unlock(&mddev->open_mutex); |
7182 | sync_blockdev(bdev); | |
7183 | } | |
1da177e4 LT |
7184 | err = mddev_lock(mddev); |
7185 | if (err) { | |
9d48739e N |
7186 | pr_debug("md: ioctl lock interrupted, reason %d, cmd %d\n", |
7187 | err, cmd); | |
3adc28d8 | 7188 | goto out; |
1da177e4 LT |
7189 | } |
7190 | ||
c02c0aeb N |
7191 | if (cmd == SET_ARRAY_INFO) { |
7192 | mdu_array_info_t info; | |
7193 | if (!arg) | |
7194 | memset(&info, 0, sizeof(info)); | |
7195 | else if (copy_from_user(&info, argp, sizeof(info))) { | |
7196 | err = -EFAULT; | |
3adc28d8 | 7197 | goto unlock; |
c02c0aeb N |
7198 | } |
7199 | if (mddev->pers) { | |
7200 | err = update_array_info(mddev, &info); | |
7201 | if (err) { | |
9d48739e | 7202 | pr_warn("md: couldn't update array info. %d\n", err); |
3adc28d8 | 7203 | goto unlock; |
1da177e4 | 7204 | } |
3adc28d8 | 7205 | goto unlock; |
c02c0aeb N |
7206 | } |
7207 | if (!list_empty(&mddev->disks)) { | |
9d48739e | 7208 | pr_warn("md: array %s already has disks!\n", mdname(mddev)); |
c02c0aeb | 7209 | err = -EBUSY; |
3adc28d8 | 7210 | goto unlock; |
c02c0aeb N |
7211 | } |
7212 | if (mddev->raid_disks) { | |
9d48739e | 7213 | pr_warn("md: array %s already initialised!\n", mdname(mddev)); |
c02c0aeb | 7214 | err = -EBUSY; |
3adc28d8 | 7215 | goto unlock; |
c02c0aeb N |
7216 | } |
7217 | err = set_array_info(mddev, &info); | |
7218 | if (err) { | |
9d48739e | 7219 | pr_warn("md: couldn't set array info. %d\n", err); |
3adc28d8 | 7220 | goto unlock; |
c02c0aeb | 7221 | } |
3adc28d8 | 7222 | goto unlock; |
1da177e4 LT |
7223 | } |
7224 | ||
7225 | /* | |
7226 | * Commands querying/configuring an existing array: | |
7227 | */ | |
32a7627c | 7228 | /* if we are not initialised yet, only ADD_NEW_DISK, STOP_ARRAY, |
3f9d7b0d | 7229 | * RUN_ARRAY, and GET_ and SET_BITMAP_FILE are allowed */ |
a17184a9 N |
7230 | if ((!mddev->raid_disks && !mddev->external) |
7231 | && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY | |
7232 | && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE | |
7233 | && cmd != GET_BITMAP_FILE) { | |
1da177e4 | 7234 | err = -ENODEV; |
3adc28d8 | 7235 | goto unlock; |
1da177e4 LT |
7236 | } |
7237 | ||
7238 | /* | |
7239 | * Commands even a read-only array can execute: | |
7240 | */ | |
c02c0aeb | 7241 | switch (cmd) { |
c02c0aeb N |
7242 | case RESTART_ARRAY_RW: |
7243 | err = restart_array(mddev); | |
3adc28d8 | 7244 | goto unlock; |
1da177e4 | 7245 | |
c02c0aeb N |
7246 | case STOP_ARRAY: |
7247 | err = do_md_stop(mddev, 0, bdev); | |
3adc28d8 | 7248 | goto unlock; |
1da177e4 | 7249 | |
c02c0aeb N |
7250 | case STOP_ARRAY_RO: |
7251 | err = md_set_readonly(mddev, bdev); | |
3adc28d8 | 7252 | goto unlock; |
1da177e4 | 7253 | |
3ea8929d N |
7254 | case HOT_REMOVE_DISK: |
7255 | err = hot_remove_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7256 | goto unlock; |
3ea8929d | 7257 | |
7ceb17e8 N |
7258 | case ADD_NEW_DISK: |
7259 | /* We can support ADD_NEW_DISK on read-only arrays | |
466ad292 | 7260 | * only if we are re-adding a preexisting device. |
7ceb17e8 N |
7261 | * So require mddev->pers and MD_DISK_SYNC. |
7262 | */ | |
7263 | if (mddev->pers) { | |
7264 | mdu_disk_info_t info; | |
7265 | if (copy_from_user(&info, argp, sizeof(info))) | |
7266 | err = -EFAULT; | |
7267 | else if (!(info.state & (1<<MD_DISK_SYNC))) | |
7268 | /* Need to clear read-only for this */ | |
7269 | break; | |
7270 | else | |
7271 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 7272 | goto unlock; |
7ceb17e8 N |
7273 | } |
7274 | break; | |
7275 | ||
c02c0aeb N |
7276 | case BLKROSET: |
7277 | if (get_user(ro, (int __user *)(arg))) { | |
7278 | err = -EFAULT; | |
3adc28d8 | 7279 | goto unlock; |
c02c0aeb N |
7280 | } |
7281 | err = -EINVAL; | |
e2218350 | 7282 | |
c02c0aeb N |
7283 | /* if the bdev is going readonly the value of mddev->ro |
7284 | * does not matter, no writes are coming | |
7285 | */ | |
7286 | if (ro) | |
3adc28d8 | 7287 | goto unlock; |
e2218350 | 7288 | |
c02c0aeb N |
7289 | /* are we are already prepared for writes? */ |
7290 | if (mddev->ro != 1) | |
3adc28d8 | 7291 | goto unlock; |
e2218350 | 7292 | |
c02c0aeb N |
7293 | /* transitioning to readauto need only happen for |
7294 | * arrays that call md_write_start | |
7295 | */ | |
7296 | if (mddev->pers) { | |
7297 | err = restart_array(mddev); | |
7298 | if (err == 0) { | |
7299 | mddev->ro = 2; | |
7300 | set_disk_ro(mddev->gendisk, 0); | |
e2218350 | 7301 | } |
c02c0aeb | 7302 | } |
3adc28d8 | 7303 | goto unlock; |
1da177e4 LT |
7304 | } |
7305 | ||
7306 | /* | |
7307 | * The remaining ioctls are changing the state of the | |
f91de92e | 7308 | * superblock, so we do not allow them on read-only arrays. |
1da177e4 | 7309 | */ |
326eb17d | 7310 | if (mddev->ro && mddev->pers) { |
f91de92e N |
7311 | if (mddev->ro == 2) { |
7312 | mddev->ro = 0; | |
00bcb4ac | 7313 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 7314 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f3378b48 N |
7315 | /* mddev_unlock will wake thread */ |
7316 | /* If a device failed while we were read-only, we | |
7317 | * need to make sure the metadata is updated now. | |
7318 | */ | |
2953079c | 7319 | if (test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) { |
f3378b48 N |
7320 | mddev_unlock(mddev); |
7321 | wait_event(mddev->sb_wait, | |
2953079c SL |
7322 | !test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags) && |
7323 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); | |
29f097c4 | 7324 | mddev_lock_nointr(mddev); |
f3378b48 | 7325 | } |
f91de92e N |
7326 | } else { |
7327 | err = -EROFS; | |
3adc28d8 | 7328 | goto unlock; |
f91de92e | 7329 | } |
1da177e4 LT |
7330 | } |
7331 | ||
c02c0aeb N |
7332 | switch (cmd) { |
7333 | case ADD_NEW_DISK: | |
1da177e4 | 7334 | { |
c02c0aeb N |
7335 | mdu_disk_info_t info; |
7336 | if (copy_from_user(&info, argp, sizeof(info))) | |
7337 | err = -EFAULT; | |
7338 | else | |
7339 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 7340 | goto unlock; |
c02c0aeb | 7341 | } |
1da177e4 | 7342 | |
1aee41f6 GR |
7343 | case CLUSTERED_DISK_NACK: |
7344 | if (mddev_is_clustered(mddev)) | |
7345 | md_cluster_ops->new_disk_ack(mddev, false); | |
7346 | else | |
7347 | err = -EINVAL; | |
7348 | goto unlock; | |
7349 | ||
c02c0aeb N |
7350 | case HOT_ADD_DISK: |
7351 | err = hot_add_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7352 | goto unlock; |
1da177e4 | 7353 | |
c02c0aeb N |
7354 | case RUN_ARRAY: |
7355 | err = do_md_run(mddev); | |
3adc28d8 | 7356 | goto unlock; |
1da177e4 | 7357 | |
c02c0aeb N |
7358 | case SET_BITMAP_FILE: |
7359 | err = set_bitmap_file(mddev, (int)arg); | |
3adc28d8 | 7360 | goto unlock; |
32a7627c | 7361 | |
c02c0aeb N |
7362 | default: |
7363 | err = -EINVAL; | |
3adc28d8 | 7364 | goto unlock; |
1da177e4 LT |
7365 | } |
7366 | ||
3adc28d8 | 7367 | unlock: |
d3374825 N |
7368 | if (mddev->hold_active == UNTIL_IOCTL && |
7369 | err != -EINVAL) | |
7370 | mddev->hold_active = 0; | |
1da177e4 | 7371 | mddev_unlock(mddev); |
3adc28d8 | 7372 | out: |
065e519e N |
7373 | if(did_set_md_closing) |
7374 | clear_bit(MD_CLOSING, &mddev->flags); | |
1da177e4 LT |
7375 | return err; |
7376 | } | |
aa98aa31 AB |
7377 | #ifdef CONFIG_COMPAT |
7378 | static int md_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
7379 | unsigned int cmd, unsigned long arg) | |
7380 | { | |
7381 | switch (cmd) { | |
7382 | case HOT_REMOVE_DISK: | |
7383 | case HOT_ADD_DISK: | |
7384 | case SET_DISK_FAULTY: | |
7385 | case SET_BITMAP_FILE: | |
7386 | /* These take in integer arg, do not convert */ | |
7387 | break; | |
7388 | default: | |
7389 | arg = (unsigned long)compat_ptr(arg); | |
7390 | break; | |
7391 | } | |
7392 | ||
7393 | return md_ioctl(bdev, mode, cmd, arg); | |
7394 | } | |
7395 | #endif /* CONFIG_COMPAT */ | |
1da177e4 | 7396 | |
a39907fa | 7397 | static int md_open(struct block_device *bdev, fmode_t mode) |
1da177e4 LT |
7398 | { |
7399 | /* | |
7400 | * Succeed if we can lock the mddev, which confirms that | |
7401 | * it isn't being stopped right now. | |
7402 | */ | |
fd01b88c | 7403 | struct mddev *mddev = mddev_find(bdev->bd_dev); |
1da177e4 LT |
7404 | int err; |
7405 | ||
0c098220 YL |
7406 | if (!mddev) |
7407 | return -ENODEV; | |
7408 | ||
d3374825 N |
7409 | if (mddev->gendisk != bdev->bd_disk) { |
7410 | /* we are racing with mddev_put which is discarding this | |
7411 | * bd_disk. | |
7412 | */ | |
7413 | mddev_put(mddev); | |
7414 | /* Wait until bdev->bd_disk is definitely gone */ | |
e804ac78 | 7415 | flush_workqueue(md_misc_wq); |
d3374825 N |
7416 | /* Then retry the open from the top */ |
7417 | return -ERESTARTSYS; | |
7418 | } | |
7419 | BUG_ON(mddev != bdev->bd_disk->private_data); | |
7420 | ||
c8c00a69 | 7421 | if ((err = mutex_lock_interruptible(&mddev->open_mutex))) |
1da177e4 LT |
7422 | goto out; |
7423 | ||
af8d8e6f GJ |
7424 | if (test_bit(MD_CLOSING, &mddev->flags)) { |
7425 | mutex_unlock(&mddev->open_mutex); | |
e2342ca8 N |
7426 | err = -ENODEV; |
7427 | goto out; | |
af8d8e6f GJ |
7428 | } |
7429 | ||
1da177e4 | 7430 | err = 0; |
f2ea68cf | 7431 | atomic_inc(&mddev->openers); |
c8c00a69 | 7432 | mutex_unlock(&mddev->open_mutex); |
1da177e4 | 7433 | |
f0b4f7e2 | 7434 | check_disk_change(bdev); |
1da177e4 | 7435 | out: |
e2342ca8 N |
7436 | if (err) |
7437 | mddev_put(mddev); | |
1da177e4 LT |
7438 | return err; |
7439 | } | |
7440 | ||
db2a144b | 7441 | static void md_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 7442 | { |
f72ffdd6 | 7443 | struct mddev *mddev = disk->private_data; |
1da177e4 | 7444 | |
52e5f9d1 | 7445 | BUG_ON(!mddev); |
f2ea68cf | 7446 | atomic_dec(&mddev->openers); |
1da177e4 | 7447 | mddev_put(mddev); |
1da177e4 | 7448 | } |
f0b4f7e2 N |
7449 | |
7450 | static int md_media_changed(struct gendisk *disk) | |
7451 | { | |
fd01b88c | 7452 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7453 | |
7454 | return mddev->changed; | |
7455 | } | |
7456 | ||
7457 | static int md_revalidate(struct gendisk *disk) | |
7458 | { | |
fd01b88c | 7459 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7460 | |
7461 | mddev->changed = 0; | |
7462 | return 0; | |
7463 | } | |
83d5cde4 | 7464 | static const struct block_device_operations md_fops = |
1da177e4 LT |
7465 | { |
7466 | .owner = THIS_MODULE, | |
a39907fa AV |
7467 | .open = md_open, |
7468 | .release = md_release, | |
b492b852 | 7469 | .ioctl = md_ioctl, |
aa98aa31 AB |
7470 | #ifdef CONFIG_COMPAT |
7471 | .compat_ioctl = md_compat_ioctl, | |
7472 | #endif | |
a885c8c4 | 7473 | .getgeo = md_getgeo, |
f0b4f7e2 N |
7474 | .media_changed = md_media_changed, |
7475 | .revalidate_disk= md_revalidate, | |
1da177e4 LT |
7476 | }; |
7477 | ||
f72ffdd6 | 7478 | static int md_thread(void *arg) |
1da177e4 | 7479 | { |
2b8bf345 | 7480 | struct md_thread *thread = arg; |
1da177e4 | 7481 | |
1da177e4 LT |
7482 | /* |
7483 | * md_thread is a 'system-thread', it's priority should be very | |
7484 | * high. We avoid resource deadlocks individually in each | |
7485 | * raid personality. (RAID5 does preallocation) We also use RR and | |
7486 | * the very same RT priority as kswapd, thus we will never get | |
7487 | * into a priority inversion deadlock. | |
7488 | * | |
7489 | * we definitely have to have equal or higher priority than | |
7490 | * bdflush, otherwise bdflush will deadlock if there are too | |
7491 | * many dirty RAID5 blocks. | |
7492 | */ | |
1da177e4 | 7493 | |
6985c43f | 7494 | allow_signal(SIGKILL); |
a6fb0934 | 7495 | while (!kthread_should_stop()) { |
1da177e4 | 7496 | |
93588e22 N |
7497 | /* We need to wait INTERRUPTIBLE so that |
7498 | * we don't add to the load-average. | |
7499 | * That means we need to be sure no signals are | |
7500 | * pending | |
7501 | */ | |
7502 | if (signal_pending(current)) | |
7503 | flush_signals(current); | |
7504 | ||
7505 | wait_event_interruptible_timeout | |
7506 | (thread->wqueue, | |
7507 | test_bit(THREAD_WAKEUP, &thread->flags) | |
ce1ccd07 | 7508 | || kthread_should_stop() || kthread_should_park(), |
93588e22 | 7509 | thread->timeout); |
1da177e4 | 7510 | |
6c987910 | 7511 | clear_bit(THREAD_WAKEUP, &thread->flags); |
ce1ccd07 SL |
7512 | if (kthread_should_park()) |
7513 | kthread_parkme(); | |
6c987910 | 7514 | if (!kthread_should_stop()) |
4ed8731d | 7515 | thread->run(thread); |
1da177e4 | 7516 | } |
a6fb0934 | 7517 | |
1da177e4 LT |
7518 | return 0; |
7519 | } | |
7520 | ||
2b8bf345 | 7521 | void md_wakeup_thread(struct md_thread *thread) |
1da177e4 LT |
7522 | { |
7523 | if (thread) { | |
36a4e1fe | 7524 | pr_debug("md: waking up MD thread %s.\n", thread->tsk->comm); |
d1d90147 GJ |
7525 | set_bit(THREAD_WAKEUP, &thread->flags); |
7526 | wake_up(&thread->wqueue); | |
1da177e4 LT |
7527 | } |
7528 | } | |
6c144d31 | 7529 | EXPORT_SYMBOL(md_wakeup_thread); |
1da177e4 | 7530 | |
4ed8731d SL |
7531 | struct md_thread *md_register_thread(void (*run) (struct md_thread *), |
7532 | struct mddev *mddev, const char *name) | |
1da177e4 | 7533 | { |
2b8bf345 | 7534 | struct md_thread *thread; |
1da177e4 | 7535 | |
2b8bf345 | 7536 | thread = kzalloc(sizeof(struct md_thread), GFP_KERNEL); |
1da177e4 LT |
7537 | if (!thread) |
7538 | return NULL; | |
7539 | ||
1da177e4 LT |
7540 | init_waitqueue_head(&thread->wqueue); |
7541 | ||
1da177e4 LT |
7542 | thread->run = run; |
7543 | thread->mddev = mddev; | |
32a7627c | 7544 | thread->timeout = MAX_SCHEDULE_TIMEOUT; |
0da3c619 N |
7545 | thread->tsk = kthread_run(md_thread, thread, |
7546 | "%s_%s", | |
7547 | mdname(thread->mddev), | |
0232605d | 7548 | name); |
a6fb0934 | 7549 | if (IS_ERR(thread->tsk)) { |
1da177e4 LT |
7550 | kfree(thread); |
7551 | return NULL; | |
7552 | } | |
1da177e4 LT |
7553 | return thread; |
7554 | } | |
6c144d31 | 7555 | EXPORT_SYMBOL(md_register_thread); |
1da177e4 | 7556 | |
2b8bf345 | 7557 | void md_unregister_thread(struct md_thread **threadp) |
1da177e4 | 7558 | { |
2b8bf345 | 7559 | struct md_thread *thread = *threadp; |
e0cf8f04 N |
7560 | if (!thread) |
7561 | return; | |
36a4e1fe | 7562 | pr_debug("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk)); |
01f96c0a N |
7563 | /* Locking ensures that mddev_unlock does not wake_up a |
7564 | * non-existent thread | |
7565 | */ | |
7566 | spin_lock(&pers_lock); | |
7567 | *threadp = NULL; | |
7568 | spin_unlock(&pers_lock); | |
a6fb0934 N |
7569 | |
7570 | kthread_stop(thread->tsk); | |
1da177e4 LT |
7571 | kfree(thread); |
7572 | } | |
6c144d31 | 7573 | EXPORT_SYMBOL(md_unregister_thread); |
1da177e4 | 7574 | |
fd01b88c | 7575 | void md_error(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 7576 | { |
b2d444d7 | 7577 | if (!rdev || test_bit(Faulty, &rdev->flags)) |
1da177e4 | 7578 | return; |
6bfe0b49 | 7579 | |
de393cde | 7580 | if (!mddev->pers || !mddev->pers->error_handler) |
1da177e4 LT |
7581 | return; |
7582 | mddev->pers->error_handler(mddev,rdev); | |
72a23c21 NB |
7583 | if (mddev->degraded) |
7584 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
00bcb4ac | 7585 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
7586 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
7587 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7588 | md_wakeup_thread(mddev->thread); | |
768a418d | 7589 | if (mddev->event_work.func) |
e804ac78 | 7590 | queue_work(md_misc_wq, &mddev->event_work); |
bb9ef716 | 7591 | md_new_event(mddev); |
1da177e4 | 7592 | } |
6c144d31 | 7593 | EXPORT_SYMBOL(md_error); |
1da177e4 LT |
7594 | |
7595 | /* seq_file implementation /proc/mdstat */ | |
7596 | ||
7597 | static void status_unused(struct seq_file *seq) | |
7598 | { | |
7599 | int i = 0; | |
3cb03002 | 7600 | struct md_rdev *rdev; |
1da177e4 LT |
7601 | |
7602 | seq_printf(seq, "unused devices: "); | |
7603 | ||
159ec1fc | 7604 | list_for_each_entry(rdev, &pending_raid_disks, same_set) { |
1da177e4 LT |
7605 | char b[BDEVNAME_SIZE]; |
7606 | i++; | |
7607 | seq_printf(seq, "%s ", | |
7608 | bdevname(rdev->bdev,b)); | |
7609 | } | |
7610 | if (!i) | |
7611 | seq_printf(seq, "<none>"); | |
7612 | ||
7613 | seq_printf(seq, "\n"); | |
7614 | } | |
7615 | ||
f7851be7 | 7616 | static int status_resync(struct seq_file *seq, struct mddev *mddev) |
1da177e4 | 7617 | { |
dd71cf6b N |
7618 | sector_t max_sectors, resync, res; |
7619 | unsigned long dt, db; | |
7620 | sector_t rt; | |
4588b42e N |
7621 | int scale; |
7622 | unsigned int per_milli; | |
1da177e4 | 7623 | |
c804cdec N |
7624 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
7625 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
dd71cf6b | 7626 | max_sectors = mddev->resync_max_sectors; |
1da177e4 | 7627 | else |
dd71cf6b | 7628 | max_sectors = mddev->dev_sectors; |
1da177e4 | 7629 | |
f7851be7 N |
7630 | resync = mddev->curr_resync; |
7631 | if (resync <= 3) { | |
7632 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) | |
7633 | /* Still cleaning up */ | |
7634 | resync = max_sectors; | |
d2e2ec82 ND |
7635 | } else if (resync > max_sectors) |
7636 | resync = max_sectors; | |
7637 | else | |
f7851be7 N |
7638 | resync -= atomic_read(&mddev->recovery_active); |
7639 | ||
7640 | if (resync == 0) { | |
7641 | if (mddev->recovery_cp < MaxSector) { | |
7642 | seq_printf(seq, "\tresync=PENDING"); | |
7643 | return 1; | |
7644 | } | |
7645 | return 0; | |
7646 | } | |
7647 | if (resync < 3) { | |
7648 | seq_printf(seq, "\tresync=DELAYED"); | |
7649 | return 1; | |
7650 | } | |
7651 | ||
403df478 | 7652 | WARN_ON(max_sectors == 0); |
4588b42e | 7653 | /* Pick 'scale' such that (resync>>scale)*1000 will fit |
dd71cf6b | 7654 | * in a sector_t, and (max_sectors>>scale) will fit in a |
4588b42e N |
7655 | * u32, as those are the requirements for sector_div. |
7656 | * Thus 'scale' must be at least 10 | |
7657 | */ | |
7658 | scale = 10; | |
7659 | if (sizeof(sector_t) > sizeof(unsigned long)) { | |
dd71cf6b | 7660 | while ( max_sectors/2 > (1ULL<<(scale+32))) |
4588b42e N |
7661 | scale++; |
7662 | } | |
7663 | res = (resync>>scale)*1000; | |
dd71cf6b | 7664 | sector_div(res, (u32)((max_sectors>>scale)+1)); |
4588b42e N |
7665 | |
7666 | per_milli = res; | |
1da177e4 | 7667 | { |
4588b42e | 7668 | int i, x = per_milli/50, y = 20-x; |
1da177e4 LT |
7669 | seq_printf(seq, "["); |
7670 | for (i = 0; i < x; i++) | |
7671 | seq_printf(seq, "="); | |
7672 | seq_printf(seq, ">"); | |
7673 | for (i = 0; i < y; i++) | |
7674 | seq_printf(seq, "."); | |
7675 | seq_printf(seq, "] "); | |
7676 | } | |
4588b42e | 7677 | seq_printf(seq, " %s =%3u.%u%% (%llu/%llu)", |
ccfcc3c1 N |
7678 | (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)? |
7679 | "reshape" : | |
61df9d91 N |
7680 | (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)? |
7681 | "check" : | |
7682 | (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? | |
7683 | "resync" : "recovery"))), | |
7684 | per_milli/10, per_milli % 10, | |
dd71cf6b N |
7685 | (unsigned long long) resync/2, |
7686 | (unsigned long long) max_sectors/2); | |
1da177e4 LT |
7687 | |
7688 | /* | |
1da177e4 LT |
7689 | * dt: time from mark until now |
7690 | * db: blocks written from mark until now | |
7691 | * rt: remaining time | |
dd71cf6b N |
7692 | * |
7693 | * rt is a sector_t, so could be 32bit or 64bit. | |
7694 | * So we divide before multiply in case it is 32bit and close | |
7695 | * to the limit. | |
25985edc | 7696 | * We scale the divisor (db) by 32 to avoid losing precision |
dd71cf6b N |
7697 | * near the end of resync when the number of remaining sectors |
7698 | * is close to 'db'. | |
7699 | * We then divide rt by 32 after multiplying by db to compensate. | |
7700 | * The '+1' avoids division by zero if db is very small. | |
1da177e4 LT |
7701 | */ |
7702 | dt = ((jiffies - mddev->resync_mark) / HZ); | |
7703 | if (!dt) dt++; | |
ff4e8d9a N |
7704 | db = (mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active)) |
7705 | - mddev->resync_mark_cnt; | |
1da177e4 | 7706 | |
dd71cf6b N |
7707 | rt = max_sectors - resync; /* number of remaining sectors */ |
7708 | sector_div(rt, db/32+1); | |
7709 | rt *= dt; | |
7710 | rt >>= 5; | |
7711 | ||
7712 | seq_printf(seq, " finish=%lu.%lumin", (unsigned long)rt / 60, | |
7713 | ((unsigned long)rt % 60)/6); | |
1da177e4 | 7714 | |
ff4e8d9a | 7715 | seq_printf(seq, " speed=%ldK/sec", db/2/dt); |
f7851be7 | 7716 | return 1; |
1da177e4 LT |
7717 | } |
7718 | ||
7719 | static void *md_seq_start(struct seq_file *seq, loff_t *pos) | |
7720 | { | |
7721 | struct list_head *tmp; | |
7722 | loff_t l = *pos; | |
fd01b88c | 7723 | struct mddev *mddev; |
1da177e4 LT |
7724 | |
7725 | if (l >= 0x10000) | |
7726 | return NULL; | |
7727 | if (!l--) | |
7728 | /* header */ | |
7729 | return (void*)1; | |
7730 | ||
7731 | spin_lock(&all_mddevs_lock); | |
7732 | list_for_each(tmp,&all_mddevs) | |
7733 | if (!l--) { | |
fd01b88c | 7734 | mddev = list_entry(tmp, struct mddev, all_mddevs); |
1da177e4 LT |
7735 | mddev_get(mddev); |
7736 | spin_unlock(&all_mddevs_lock); | |
7737 | return mddev; | |
7738 | } | |
7739 | spin_unlock(&all_mddevs_lock); | |
7740 | if (!l--) | |
7741 | return (void*)2;/* tail */ | |
7742 | return NULL; | |
7743 | } | |
7744 | ||
7745 | static void *md_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
7746 | { | |
7747 | struct list_head *tmp; | |
fd01b88c | 7748 | struct mddev *next_mddev, *mddev = v; |
f72ffdd6 | 7749 | |
1da177e4 LT |
7750 | ++*pos; |
7751 | if (v == (void*)2) | |
7752 | return NULL; | |
7753 | ||
7754 | spin_lock(&all_mddevs_lock); | |
7755 | if (v == (void*)1) | |
7756 | tmp = all_mddevs.next; | |
7757 | else | |
7758 | tmp = mddev->all_mddevs.next; | |
7759 | if (tmp != &all_mddevs) | |
fd01b88c | 7760 | next_mddev = mddev_get(list_entry(tmp,struct mddev,all_mddevs)); |
1da177e4 LT |
7761 | else { |
7762 | next_mddev = (void*)2; | |
7763 | *pos = 0x10000; | |
f72ffdd6 | 7764 | } |
1da177e4 LT |
7765 | spin_unlock(&all_mddevs_lock); |
7766 | ||
7767 | if (v != (void*)1) | |
7768 | mddev_put(mddev); | |
7769 | return next_mddev; | |
7770 | ||
7771 | } | |
7772 | ||
7773 | static void md_seq_stop(struct seq_file *seq, void *v) | |
7774 | { | |
fd01b88c | 7775 | struct mddev *mddev = v; |
1da177e4 LT |
7776 | |
7777 | if (mddev && v != (void*)1 && v != (void*)2) | |
7778 | mddev_put(mddev); | |
7779 | } | |
7780 | ||
7781 | static int md_seq_show(struct seq_file *seq, void *v) | |
7782 | { | |
fd01b88c | 7783 | struct mddev *mddev = v; |
dd8ac336 | 7784 | sector_t sectors; |
3cb03002 | 7785 | struct md_rdev *rdev; |
1da177e4 LT |
7786 | |
7787 | if (v == (void*)1) { | |
84fc4b56 | 7788 | struct md_personality *pers; |
1da177e4 LT |
7789 | seq_printf(seq, "Personalities : "); |
7790 | spin_lock(&pers_lock); | |
2604b703 N |
7791 | list_for_each_entry(pers, &pers_list, list) |
7792 | seq_printf(seq, "[%s] ", pers->name); | |
1da177e4 LT |
7793 | |
7794 | spin_unlock(&pers_lock); | |
7795 | seq_printf(seq, "\n"); | |
f1514638 | 7796 | seq->poll_event = atomic_read(&md_event_count); |
1da177e4 LT |
7797 | return 0; |
7798 | } | |
7799 | if (v == (void*)2) { | |
7800 | status_unused(seq); | |
7801 | return 0; | |
7802 | } | |
7803 | ||
36d091f4 | 7804 | spin_lock(&mddev->lock); |
1da177e4 LT |
7805 | if (mddev->pers || mddev->raid_disks || !list_empty(&mddev->disks)) { |
7806 | seq_printf(seq, "%s : %sactive", mdname(mddev), | |
7807 | mddev->pers ? "" : "in"); | |
7808 | if (mddev->pers) { | |
f91de92e | 7809 | if (mddev->ro==1) |
1da177e4 | 7810 | seq_printf(seq, " (read-only)"); |
f91de92e | 7811 | if (mddev->ro==2) |
52720ae7 | 7812 | seq_printf(seq, " (auto-read-only)"); |
1da177e4 LT |
7813 | seq_printf(seq, " %s", mddev->pers->name); |
7814 | } | |
7815 | ||
dd8ac336 | 7816 | sectors = 0; |
f97fcad3 N |
7817 | rcu_read_lock(); |
7818 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 LT |
7819 | char b[BDEVNAME_SIZE]; |
7820 | seq_printf(seq, " %s[%d]", | |
7821 | bdevname(rdev->bdev,b), rdev->desc_nr); | |
8ddf9efe N |
7822 | if (test_bit(WriteMostly, &rdev->flags)) |
7823 | seq_printf(seq, "(W)"); | |
9efdca16 SL |
7824 | if (test_bit(Journal, &rdev->flags)) |
7825 | seq_printf(seq, "(J)"); | |
b2d444d7 | 7826 | if (test_bit(Faulty, &rdev->flags)) { |
1da177e4 LT |
7827 | seq_printf(seq, "(F)"); |
7828 | continue; | |
2d78f8c4 N |
7829 | } |
7830 | if (rdev->raid_disk < 0) | |
b325a32e | 7831 | seq_printf(seq, "(S)"); /* spare */ |
2d78f8c4 N |
7832 | if (test_bit(Replacement, &rdev->flags)) |
7833 | seq_printf(seq, "(R)"); | |
dd8ac336 | 7834 | sectors += rdev->sectors; |
1da177e4 | 7835 | } |
f97fcad3 | 7836 | rcu_read_unlock(); |
1da177e4 LT |
7837 | |
7838 | if (!list_empty(&mddev->disks)) { | |
7839 | if (mddev->pers) | |
7840 | seq_printf(seq, "\n %llu blocks", | |
f233ea5c AN |
7841 | (unsigned long long) |
7842 | mddev->array_sectors / 2); | |
1da177e4 LT |
7843 | else |
7844 | seq_printf(seq, "\n %llu blocks", | |
dd8ac336 | 7845 | (unsigned long long)sectors / 2); |
1da177e4 | 7846 | } |
1cd6bf19 N |
7847 | if (mddev->persistent) { |
7848 | if (mddev->major_version != 0 || | |
7849 | mddev->minor_version != 90) { | |
7850 | seq_printf(seq," super %d.%d", | |
7851 | mddev->major_version, | |
7852 | mddev->minor_version); | |
7853 | } | |
e691063a N |
7854 | } else if (mddev->external) |
7855 | seq_printf(seq, " super external:%s", | |
7856 | mddev->metadata_type); | |
7857 | else | |
1cd6bf19 | 7858 | seq_printf(seq, " super non-persistent"); |
1da177e4 LT |
7859 | |
7860 | if (mddev->pers) { | |
d710e138 | 7861 | mddev->pers->status(seq, mddev); |
f72ffdd6 | 7862 | seq_printf(seq, "\n "); |
8e1b39d6 | 7863 | if (mddev->pers->sync_request) { |
f7851be7 | 7864 | if (status_resync(seq, mddev)) |
8e1b39d6 | 7865 | seq_printf(seq, "\n "); |
8e1b39d6 | 7866 | } |
32a7627c N |
7867 | } else |
7868 | seq_printf(seq, "\n "); | |
7869 | ||
57148964 | 7870 | bitmap_status(seq, mddev->bitmap); |
1da177e4 LT |
7871 | |
7872 | seq_printf(seq, "\n"); | |
7873 | } | |
36d091f4 | 7874 | spin_unlock(&mddev->lock); |
f72ffdd6 | 7875 | |
1da177e4 LT |
7876 | return 0; |
7877 | } | |
7878 | ||
110518bc | 7879 | static const struct seq_operations md_seq_ops = { |
1da177e4 LT |
7880 | .start = md_seq_start, |
7881 | .next = md_seq_next, | |
7882 | .stop = md_seq_stop, | |
7883 | .show = md_seq_show, | |
7884 | }; | |
7885 | ||
7886 | static int md_seq_open(struct inode *inode, struct file *file) | |
7887 | { | |
f1514638 | 7888 | struct seq_file *seq; |
1da177e4 LT |
7889 | int error; |
7890 | ||
7891 | error = seq_open(file, &md_seq_ops); | |
d7603b7e | 7892 | if (error) |
f1514638 KS |
7893 | return error; |
7894 | ||
7895 | seq = file->private_data; | |
7896 | seq->poll_event = atomic_read(&md_event_count); | |
1da177e4 LT |
7897 | return error; |
7898 | } | |
7899 | ||
e2f23b60 | 7900 | static int md_unloading; |
d7603b7e N |
7901 | static unsigned int mdstat_poll(struct file *filp, poll_table *wait) |
7902 | { | |
f1514638 | 7903 | struct seq_file *seq = filp->private_data; |
d7603b7e N |
7904 | int mask; |
7905 | ||
e2f23b60 | 7906 | if (md_unloading) |
7d7e64f2 | 7907 | return POLLIN|POLLRDNORM|POLLERR|POLLPRI; |
d7603b7e N |
7908 | poll_wait(filp, &md_event_waiters, wait); |
7909 | ||
7910 | /* always allow read */ | |
7911 | mask = POLLIN | POLLRDNORM; | |
7912 | ||
f1514638 | 7913 | if (seq->poll_event != atomic_read(&md_event_count)) |
d7603b7e N |
7914 | mask |= POLLERR | POLLPRI; |
7915 | return mask; | |
7916 | } | |
7917 | ||
fa027c2a | 7918 | static const struct file_operations md_seq_fops = { |
e24650c2 | 7919 | .owner = THIS_MODULE, |
1da177e4 LT |
7920 | .open = md_seq_open, |
7921 | .read = seq_read, | |
7922 | .llseek = seq_lseek, | |
26e13043 | 7923 | .release = seq_release, |
d7603b7e | 7924 | .poll = mdstat_poll, |
1da177e4 LT |
7925 | }; |
7926 | ||
84fc4b56 | 7927 | int register_md_personality(struct md_personality *p) |
1da177e4 | 7928 | { |
9d48739e N |
7929 | pr_debug("md: %s personality registered for level %d\n", |
7930 | p->name, p->level); | |
1da177e4 | 7931 | spin_lock(&pers_lock); |
2604b703 | 7932 | list_add_tail(&p->list, &pers_list); |
1da177e4 LT |
7933 | spin_unlock(&pers_lock); |
7934 | return 0; | |
7935 | } | |
6c144d31 | 7936 | EXPORT_SYMBOL(register_md_personality); |
1da177e4 | 7937 | |
84fc4b56 | 7938 | int unregister_md_personality(struct md_personality *p) |
1da177e4 | 7939 | { |
9d48739e | 7940 | pr_debug("md: %s personality unregistered\n", p->name); |
1da177e4 | 7941 | spin_lock(&pers_lock); |
2604b703 | 7942 | list_del_init(&p->list); |
1da177e4 LT |
7943 | spin_unlock(&pers_lock); |
7944 | return 0; | |
7945 | } | |
6c144d31 | 7946 | EXPORT_SYMBOL(unregister_md_personality); |
1da177e4 | 7947 | |
6022e75b N |
7948 | int register_md_cluster_operations(struct md_cluster_operations *ops, |
7949 | struct module *module) | |
edb39c9d | 7950 | { |
6022e75b | 7951 | int ret = 0; |
edb39c9d | 7952 | spin_lock(&pers_lock); |
6022e75b N |
7953 | if (md_cluster_ops != NULL) |
7954 | ret = -EALREADY; | |
7955 | else { | |
7956 | md_cluster_ops = ops; | |
7957 | md_cluster_mod = module; | |
7958 | } | |
edb39c9d | 7959 | spin_unlock(&pers_lock); |
6022e75b | 7960 | return ret; |
edb39c9d GR |
7961 | } |
7962 | EXPORT_SYMBOL(register_md_cluster_operations); | |
7963 | ||
7964 | int unregister_md_cluster_operations(void) | |
7965 | { | |
7966 | spin_lock(&pers_lock); | |
7967 | md_cluster_ops = NULL; | |
7968 | spin_unlock(&pers_lock); | |
7969 | return 0; | |
7970 | } | |
7971 | EXPORT_SYMBOL(unregister_md_cluster_operations); | |
7972 | ||
7973 | int md_setup_cluster(struct mddev *mddev, int nodes) | |
7974 | { | |
47a7b0d8 GJ |
7975 | if (!md_cluster_ops) |
7976 | request_module("md-cluster"); | |
edb39c9d | 7977 | spin_lock(&pers_lock); |
47a7b0d8 | 7978 | /* ensure module won't be unloaded */ |
edb39c9d | 7979 | if (!md_cluster_ops || !try_module_get(md_cluster_mod)) { |
9d48739e | 7980 | pr_warn("can't find md-cluster module or get it's reference.\n"); |
edb39c9d GR |
7981 | spin_unlock(&pers_lock); |
7982 | return -ENOENT; | |
7983 | } | |
7984 | spin_unlock(&pers_lock); | |
7985 | ||
cf921cc1 | 7986 | return md_cluster_ops->join(mddev, nodes); |
edb39c9d GR |
7987 | } |
7988 | ||
7989 | void md_cluster_stop(struct mddev *mddev) | |
7990 | { | |
c4ce867f GR |
7991 | if (!md_cluster_ops) |
7992 | return; | |
edb39c9d GR |
7993 | md_cluster_ops->leave(mddev); |
7994 | module_put(md_cluster_mod); | |
7995 | } | |
7996 | ||
fd01b88c | 7997 | static int is_mddev_idle(struct mddev *mddev, int init) |
1da177e4 | 7998 | { |
f72ffdd6 | 7999 | struct md_rdev *rdev; |
1da177e4 | 8000 | int idle; |
eea1bf38 | 8001 | int curr_events; |
1da177e4 LT |
8002 | |
8003 | idle = 1; | |
4b80991c N |
8004 | rcu_read_lock(); |
8005 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 8006 | struct gendisk *disk = rdev->bdev->bd_contains->bd_disk; |
eea1bf38 N |
8007 | curr_events = (int)part_stat_read(&disk->part0, sectors[0]) + |
8008 | (int)part_stat_read(&disk->part0, sectors[1]) - | |
8009 | atomic_read(&disk->sync_io); | |
713f6ab1 N |
8010 | /* sync IO will cause sync_io to increase before the disk_stats |
8011 | * as sync_io is counted when a request starts, and | |
8012 | * disk_stats is counted when it completes. | |
8013 | * So resync activity will cause curr_events to be smaller than | |
8014 | * when there was no such activity. | |
8015 | * non-sync IO will cause disk_stat to increase without | |
8016 | * increasing sync_io so curr_events will (eventually) | |
8017 | * be larger than it was before. Once it becomes | |
8018 | * substantially larger, the test below will cause | |
8019 | * the array to appear non-idle, and resync will slow | |
8020 | * down. | |
8021 | * If there is a lot of outstanding resync activity when | |
8022 | * we set last_event to curr_events, then all that activity | |
8023 | * completing might cause the array to appear non-idle | |
8024 | * and resync will be slowed down even though there might | |
8025 | * not have been non-resync activity. This will only | |
8026 | * happen once though. 'last_events' will soon reflect | |
8027 | * the state where there is little or no outstanding | |
8028 | * resync requests, and further resync activity will | |
8029 | * always make curr_events less than last_events. | |
c0e48521 | 8030 | * |
1da177e4 | 8031 | */ |
eea1bf38 | 8032 | if (init || curr_events - rdev->last_events > 64) { |
1da177e4 LT |
8033 | rdev->last_events = curr_events; |
8034 | idle = 0; | |
8035 | } | |
8036 | } | |
4b80991c | 8037 | rcu_read_unlock(); |
1da177e4 LT |
8038 | return idle; |
8039 | } | |
8040 | ||
fd01b88c | 8041 | void md_done_sync(struct mddev *mddev, int blocks, int ok) |
1da177e4 LT |
8042 | { |
8043 | /* another "blocks" (512byte) blocks have been synced */ | |
8044 | atomic_sub(blocks, &mddev->recovery_active); | |
8045 | wake_up(&mddev->recovery_wait); | |
8046 | if (!ok) { | |
dfc70645 | 8047 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
0a19caab | 8048 | set_bit(MD_RECOVERY_ERROR, &mddev->recovery); |
1da177e4 LT |
8049 | md_wakeup_thread(mddev->thread); |
8050 | // stop recovery, signal do_sync .... | |
8051 | } | |
8052 | } | |
6c144d31 | 8053 | EXPORT_SYMBOL(md_done_sync); |
1da177e4 | 8054 | |
06d91a5f N |
8055 | /* md_write_start(mddev, bi) |
8056 | * If we need to update some array metadata (e.g. 'active' flag | |
3d310eb7 N |
8057 | * in superblock) before writing, schedule a superblock update |
8058 | * and wait for it to complete. | |
cc27b0c7 N |
8059 | * A return value of 'false' means that the write wasn't recorded |
8060 | * and cannot proceed as the array is being suspend. | |
06d91a5f | 8061 | */ |
cc27b0c7 | 8062 | bool md_write_start(struct mddev *mddev, struct bio *bi) |
1da177e4 | 8063 | { |
0fd62b86 | 8064 | int did_change = 0; |
8961ee79 | 8065 | |
06d91a5f | 8066 | if (bio_data_dir(bi) != WRITE) |
cc27b0c7 | 8067 | return true; |
06d91a5f | 8068 | |
f91de92e N |
8069 | BUG_ON(mddev->ro == 1); |
8070 | if (mddev->ro == 2) { | |
8071 | /* need to switch to read/write */ | |
8072 | mddev->ro = 0; | |
8073 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8074 | md_wakeup_thread(mddev->thread); | |
25156198 | 8075 | md_wakeup_thread(mddev->sync_thread); |
0fd62b86 | 8076 | did_change = 1; |
f91de92e | 8077 | } |
4ad23a97 N |
8078 | rcu_read_lock(); |
8079 | percpu_ref_get(&mddev->writes_pending); | |
55cc39f3 | 8080 | smp_mb(); /* Match smp_mb in set_in_sync() */ |
31a59e34 N |
8081 | if (mddev->safemode == 1) |
8082 | mddev->safemode = 0; | |
4ad23a97 | 8083 | /* sync_checkers is always 0 when writes_pending is in per-cpu mode */ |
81fe48e9 | 8084 | if (mddev->in_sync || mddev->sync_checkers) { |
85572d7c | 8085 | spin_lock(&mddev->lock); |
3d310eb7 N |
8086 | if (mddev->in_sync) { |
8087 | mddev->in_sync = 0; | |
2953079c SL |
8088 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8089 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
3d310eb7 | 8090 | md_wakeup_thread(mddev->thread); |
0fd62b86 | 8091 | did_change = 1; |
3d310eb7 | 8092 | } |
85572d7c | 8093 | spin_unlock(&mddev->lock); |
06d91a5f | 8094 | } |
4ad23a97 | 8095 | rcu_read_unlock(); |
0fd62b86 | 8096 | if (did_change) |
00bcb4ac | 8097 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
8961ee79 HM |
8098 | if (!mddev->has_superblocks) |
8099 | return true; | |
09a44cc1 | 8100 | wait_event(mddev->sb_wait, |
d47c8ad2 N |
8101 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags) || |
8102 | mddev->suspended); | |
cc27b0c7 N |
8103 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) { |
8104 | percpu_ref_put(&mddev->writes_pending); | |
8105 | return false; | |
8106 | } | |
8107 | return true; | |
1da177e4 | 8108 | } |
6c144d31 | 8109 | EXPORT_SYMBOL(md_write_start); |
1da177e4 | 8110 | |
49728050 N |
8111 | /* md_write_inc can only be called when md_write_start() has |
8112 | * already been called at least once of the current request. | |
8113 | * It increments the counter and is useful when a single request | |
8114 | * is split into several parts. Each part causes an increment and | |
8115 | * so needs a matching md_write_end(). | |
8116 | * Unlike md_write_start(), it is safe to call md_write_inc() inside | |
8117 | * a spinlocked region. | |
8118 | */ | |
8119 | void md_write_inc(struct mddev *mddev, struct bio *bi) | |
8120 | { | |
8121 | if (bio_data_dir(bi) != WRITE) | |
8122 | return; | |
8123 | WARN_ON_ONCE(mddev->in_sync || mddev->ro); | |
4ad23a97 | 8124 | percpu_ref_get(&mddev->writes_pending); |
49728050 N |
8125 | } |
8126 | EXPORT_SYMBOL(md_write_inc); | |
8127 | ||
fd01b88c | 8128 | void md_write_end(struct mddev *mddev) |
1da177e4 | 8129 | { |
4ad23a97 N |
8130 | percpu_ref_put(&mddev->writes_pending); |
8131 | ||
8132 | if (mddev->safemode == 2) | |
8133 | md_wakeup_thread(mddev->thread); | |
8134 | else if (mddev->safemode_delay) | |
8135 | /* The roundup() ensures this only performs locking once | |
8136 | * every ->safemode_delay jiffies | |
8137 | */ | |
8138 | mod_timer(&mddev->safemode_timer, | |
8139 | roundup(jiffies, mddev->safemode_delay) + | |
8140 | mddev->safemode_delay); | |
1da177e4 | 8141 | } |
4ad23a97 | 8142 | |
6c144d31 | 8143 | EXPORT_SYMBOL(md_write_end); |
1da177e4 | 8144 | |
2a2275d6 N |
8145 | /* md_allow_write(mddev) |
8146 | * Calling this ensures that the array is marked 'active' so that writes | |
8147 | * may proceed without blocking. It is important to call this before | |
8148 | * attempting a GFP_KERNEL allocation while holding the mddev lock. | |
8149 | * Must be called with mddev_lock held. | |
8150 | */ | |
2214c260 | 8151 | void md_allow_write(struct mddev *mddev) |
2a2275d6 N |
8152 | { |
8153 | if (!mddev->pers) | |
2214c260 | 8154 | return; |
2a2275d6 | 8155 | if (mddev->ro) |
2214c260 | 8156 | return; |
1a0fd497 | 8157 | if (!mddev->pers->sync_request) |
2214c260 | 8158 | return; |
2a2275d6 | 8159 | |
85572d7c | 8160 | spin_lock(&mddev->lock); |
2a2275d6 N |
8161 | if (mddev->in_sync) { |
8162 | mddev->in_sync = 0; | |
2953079c SL |
8163 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8164 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
2a2275d6 N |
8165 | if (mddev->safemode_delay && |
8166 | mddev->safemode == 0) | |
8167 | mddev->safemode = 1; | |
85572d7c | 8168 | spin_unlock(&mddev->lock); |
2a2275d6 | 8169 | md_update_sb(mddev, 0); |
00bcb4ac | 8170 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
2214c260 AP |
8171 | /* wait for the dirty state to be recorded in the metadata */ |
8172 | wait_event(mddev->sb_wait, | |
2214c260 | 8173 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
2a2275d6 | 8174 | } else |
85572d7c | 8175 | spin_unlock(&mddev->lock); |
2a2275d6 N |
8176 | } |
8177 | EXPORT_SYMBOL_GPL(md_allow_write); | |
8178 | ||
1da177e4 LT |
8179 | #define SYNC_MARKS 10 |
8180 | #define SYNC_MARK_STEP (3*HZ) | |
54f89341 | 8181 | #define UPDATE_FREQUENCY (5*60*HZ) |
4ed8731d | 8182 | void md_do_sync(struct md_thread *thread) |
1da177e4 | 8183 | { |
4ed8731d | 8184 | struct mddev *mddev = thread->mddev; |
fd01b88c | 8185 | struct mddev *mddev2; |
1da177e4 LT |
8186 | unsigned int currspeed = 0, |
8187 | window; | |
ac7e50a3 | 8188 | sector_t max_sectors,j, io_sectors, recovery_done; |
1da177e4 | 8189 | unsigned long mark[SYNC_MARKS]; |
54f89341 | 8190 | unsigned long update_time; |
1da177e4 LT |
8191 | sector_t mark_cnt[SYNC_MARKS]; |
8192 | int last_mark,m; | |
8193 | struct list_head *tmp; | |
8194 | sector_t last_check; | |
57afd89f | 8195 | int skipped = 0; |
3cb03002 | 8196 | struct md_rdev *rdev; |
c4a39551 | 8197 | char *desc, *action = NULL; |
7c2c57c9 | 8198 | struct blk_plug plug; |
41a9a0dc | 8199 | int ret; |
1da177e4 LT |
8200 | |
8201 | /* just incase thread restarts... */ | |
8202 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) | |
8203 | return; | |
3991b31e N |
8204 | if (mddev->ro) {/* never try to sync a read-only array */ |
8205 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
5fd6c1dc | 8206 | return; |
3991b31e | 8207 | } |
1da177e4 | 8208 | |
41a9a0dc GJ |
8209 | if (mddev_is_clustered(mddev)) { |
8210 | ret = md_cluster_ops->resync_start(mddev); | |
8211 | if (ret) | |
8212 | goto skip; | |
8213 | ||
bb8bf15b | 8214 | set_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags); |
41a9a0dc GJ |
8215 | if (!(test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8216 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) || | |
8217 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) | |
8218 | && ((unsigned long long)mddev->curr_resync_completed | |
8219 | < (unsigned long long)mddev->resync_max_sectors)) | |
8220 | goto skip; | |
8221 | } | |
8222 | ||
61df9d91 | 8223 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
c4a39551 | 8224 | if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) { |
61df9d91 | 8225 | desc = "data-check"; |
c4a39551 JB |
8226 | action = "check"; |
8227 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
61df9d91 | 8228 | desc = "requested-resync"; |
c4a39551 JB |
8229 | action = "repair"; |
8230 | } else | |
61df9d91 N |
8231 | desc = "resync"; |
8232 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
8233 | desc = "reshape"; | |
8234 | else | |
8235 | desc = "recovery"; | |
8236 | ||
c4a39551 JB |
8237 | mddev->last_sync_action = action ?: desc; |
8238 | ||
1da177e4 LT |
8239 | /* we overload curr_resync somewhat here. |
8240 | * 0 == not engaged in resync at all | |
8241 | * 2 == checking that there is no conflict with another sync | |
8242 | * 1 == like 2, but have yielded to allow conflicting resync to | |
8243 | * commense | |
8244 | * other == active in resync - this many blocks | |
8245 | * | |
8246 | * Before starting a resync we must have set curr_resync to | |
8247 | * 2, and then checked that every "conflicting" array has curr_resync | |
8248 | * less than ours. When we find one that is the same or higher | |
8249 | * we wait on resync_wait. To avoid deadlock, we reduce curr_resync | |
8250 | * to 1 if we choose to yield (based arbitrarily on address of mddev structure). | |
8251 | * This will mean we have to start checking from the beginning again. | |
8252 | * | |
8253 | */ | |
8254 | ||
8255 | do { | |
c622ca54 | 8256 | int mddev2_minor = -1; |
1da177e4 LT |
8257 | mddev->curr_resync = 2; |
8258 | ||
8259 | try_again: | |
404e4b43 | 8260 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
1da177e4 | 8261 | goto skip; |
29ac4aa3 | 8262 | for_each_mddev(mddev2, tmp) { |
1da177e4 LT |
8263 | if (mddev2 == mddev) |
8264 | continue; | |
90b08710 BS |
8265 | if (!mddev->parallel_resync |
8266 | && mddev2->curr_resync | |
8267 | && match_mddev_units(mddev, mddev2)) { | |
1da177e4 LT |
8268 | DEFINE_WAIT(wq); |
8269 | if (mddev < mddev2 && mddev->curr_resync == 2) { | |
8270 | /* arbitrarily yield */ | |
8271 | mddev->curr_resync = 1; | |
8272 | wake_up(&resync_wait); | |
8273 | } | |
8274 | if (mddev > mddev2 && mddev->curr_resync == 1) | |
8275 | /* no need to wait here, we can wait the next | |
8276 | * time 'round when curr_resync == 2 | |
8277 | */ | |
8278 | continue; | |
9744197c N |
8279 | /* We need to wait 'interruptible' so as not to |
8280 | * contribute to the load average, and not to | |
8281 | * be caught by 'softlockup' | |
8282 | */ | |
8283 | prepare_to_wait(&resync_wait, &wq, TASK_INTERRUPTIBLE); | |
c91abf5a | 8284 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
8712e553 | 8285 | mddev2->curr_resync >= mddev->curr_resync) { |
c622ca54 AP |
8286 | if (mddev2_minor != mddev2->md_minor) { |
8287 | mddev2_minor = mddev2->md_minor; | |
9d48739e N |
8288 | pr_info("md: delaying %s of %s until %s has finished (they share one or more physical units)\n", |
8289 | desc, mdname(mddev), | |
8290 | mdname(mddev2)); | |
c622ca54 | 8291 | } |
1da177e4 | 8292 | mddev_put(mddev2); |
9744197c N |
8293 | if (signal_pending(current)) |
8294 | flush_signals(current); | |
1da177e4 LT |
8295 | schedule(); |
8296 | finish_wait(&resync_wait, &wq); | |
8297 | goto try_again; | |
8298 | } | |
8299 | finish_wait(&resync_wait, &wq); | |
8300 | } | |
8301 | } | |
8302 | } while (mddev->curr_resync < 2); | |
8303 | ||
5fd6c1dc | 8304 | j = 0; |
9d88883e | 8305 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
1da177e4 | 8306 | /* resync follows the size requested by the personality, |
57afd89f | 8307 | * which defaults to physical size, but can be virtual size |
1da177e4 LT |
8308 | */ |
8309 | max_sectors = mddev->resync_max_sectors; | |
7f7583d4 | 8310 | atomic64_set(&mddev->resync_mismatches, 0); |
5fd6c1dc | 8311 | /* we don't use the checkpoint if there's a bitmap */ |
5e96ee65 NB |
8312 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) |
8313 | j = mddev->resync_min; | |
8314 | else if (!mddev->bitmap) | |
5fd6c1dc | 8315 | j = mddev->recovery_cp; |
5e96ee65 | 8316 | |
ccfcc3c1 | 8317 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) |
c804cdec | 8318 | max_sectors = mddev->resync_max_sectors; |
5fd6c1dc | 8319 | else { |
1da177e4 | 8320 | /* recovery follows the physical size of devices */ |
58c0fed4 | 8321 | max_sectors = mddev->dev_sectors; |
5fd6c1dc | 8322 | j = MaxSector; |
4e59ca7d | 8323 | rcu_read_lock(); |
dafb20fa | 8324 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 8325 | if (rdev->raid_disk >= 0 && |
f2076e7d | 8326 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
8327 | !test_bit(Faulty, &rdev->flags) && |
8328 | !test_bit(In_sync, &rdev->flags) && | |
8329 | rdev->recovery_offset < j) | |
8330 | j = rdev->recovery_offset; | |
4e59ca7d | 8331 | rcu_read_unlock(); |
133d4527 N |
8332 | |
8333 | /* If there is a bitmap, we need to make sure all | |
8334 | * writes that started before we added a spare | |
8335 | * complete before we start doing a recovery. | |
8336 | * Otherwise the write might complete and (via | |
8337 | * bitmap_endwrite) set a bit in the bitmap after the | |
8338 | * recovery has checked that bit and skipped that | |
8339 | * region. | |
8340 | */ | |
8341 | if (mddev->bitmap) { | |
8342 | mddev->pers->quiesce(mddev, 1); | |
8343 | mddev->pers->quiesce(mddev, 0); | |
8344 | } | |
5fd6c1dc | 8345 | } |
1da177e4 | 8346 | |
9d48739e N |
8347 | pr_info("md: %s of RAID array %s\n", desc, mdname(mddev)); |
8348 | pr_debug("md: minimum _guaranteed_ speed: %d KB/sec/disk.\n", speed_min(mddev)); | |
8349 | pr_debug("md: using maximum available idle IO bandwidth (but not more than %d KB/sec) for %s.\n", | |
8350 | speed_max(mddev), desc); | |
1da177e4 | 8351 | |
eea1bf38 | 8352 | is_mddev_idle(mddev, 1); /* this initializes IO event counters */ |
5fd6c1dc | 8353 | |
57afd89f | 8354 | io_sectors = 0; |
1da177e4 LT |
8355 | for (m = 0; m < SYNC_MARKS; m++) { |
8356 | mark[m] = jiffies; | |
57afd89f | 8357 | mark_cnt[m] = io_sectors; |
1da177e4 LT |
8358 | } |
8359 | last_mark = 0; | |
8360 | mddev->resync_mark = mark[last_mark]; | |
8361 | mddev->resync_mark_cnt = mark_cnt[last_mark]; | |
8362 | ||
8363 | /* | |
8364 | * Tune reconstruction: | |
8365 | */ | |
8366 | window = 32*(PAGE_SIZE/512); | |
9d48739e N |
8367 | pr_debug("md: using %dk window, over a total of %lluk.\n", |
8368 | window/2, (unsigned long long)max_sectors/2); | |
1da177e4 LT |
8369 | |
8370 | atomic_set(&mddev->recovery_active, 0); | |
1da177e4 LT |
8371 | last_check = 0; |
8372 | ||
8373 | if (j>2) { | |
9d48739e N |
8374 | pr_debug("md: resuming %s of %s from checkpoint.\n", |
8375 | desc, mdname(mddev)); | |
1da177e4 | 8376 | mddev->curr_resync = j; |
72f36d59 N |
8377 | } else |
8378 | mddev->curr_resync = 3; /* no longer delayed */ | |
75d3da43 | 8379 | mddev->curr_resync_completed = j; |
72f36d59 N |
8380 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); |
8381 | md_new_event(mddev); | |
54f89341 | 8382 | update_time = jiffies; |
1da177e4 | 8383 | |
7c2c57c9 | 8384 | blk_start_plug(&plug); |
1da177e4 | 8385 | while (j < max_sectors) { |
57afd89f | 8386 | sector_t sectors; |
1da177e4 | 8387 | |
57afd89f | 8388 | skipped = 0; |
97e4f42d | 8389 | |
7a91ee1f N |
8390 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8391 | ((mddev->curr_resync > mddev->curr_resync_completed && | |
8392 | (mddev->curr_resync - mddev->curr_resync_completed) | |
8393 | > (max_sectors >> 4)) || | |
54f89341 | 8394 | time_after_eq(jiffies, update_time + UPDATE_FREQUENCY) || |
7a91ee1f | 8395 | (j - mddev->curr_resync_completed)*2 |
c5e19d90 N |
8396 | >= mddev->resync_max - mddev->curr_resync_completed || |
8397 | mddev->curr_resync_completed > mddev->resync_max | |
7a91ee1f | 8398 | )) { |
97e4f42d | 8399 | /* time to update curr_resync_completed */ |
97e4f42d N |
8400 | wait_event(mddev->recovery_wait, |
8401 | atomic_read(&mddev->recovery_active) == 0); | |
75d3da43 | 8402 | mddev->curr_resync_completed = j; |
35d78c66 | 8403 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && |
8404 | j > mddev->recovery_cp) | |
8405 | mddev->recovery_cp = j; | |
54f89341 | 8406 | update_time = jiffies; |
2953079c | 8407 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
acb180b0 | 8408 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); |
97e4f42d | 8409 | } |
acb180b0 | 8410 | |
c91abf5a N |
8411 | while (j >= mddev->resync_max && |
8412 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
e62e58a5 N |
8413 | /* As this condition is controlled by user-space, |
8414 | * we can block indefinitely, so use '_interruptible' | |
8415 | * to avoid triggering warnings. | |
8416 | */ | |
8417 | flush_signals(current); /* just in case */ | |
8418 | wait_event_interruptible(mddev->recovery_wait, | |
8419 | mddev->resync_max > j | |
c91abf5a N |
8420 | || test_bit(MD_RECOVERY_INTR, |
8421 | &mddev->recovery)); | |
e62e58a5 | 8422 | } |
acb180b0 | 8423 | |
c91abf5a N |
8424 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8425 | break; | |
acb180b0 | 8426 | |
09314799 | 8427 | sectors = mddev->pers->sync_request(mddev, j, &skipped); |
57afd89f | 8428 | if (sectors == 0) { |
dfc70645 | 8429 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
c91abf5a | 8430 | break; |
1da177e4 | 8431 | } |
57afd89f N |
8432 | |
8433 | if (!skipped) { /* actual IO requested */ | |
8434 | io_sectors += sectors; | |
8435 | atomic_add(sectors, &mddev->recovery_active); | |
8436 | } | |
8437 | ||
e875ecea N |
8438 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8439 | break; | |
8440 | ||
1da177e4 | 8441 | j += sectors; |
5ed1df2e N |
8442 | if (j > max_sectors) |
8443 | /* when skipping, extra large numbers can be returned. */ | |
8444 | j = max_sectors; | |
72f36d59 N |
8445 | if (j > 2) |
8446 | mddev->curr_resync = j; | |
ff4e8d9a | 8447 | mddev->curr_mark_cnt = io_sectors; |
d7603b7e | 8448 | if (last_check == 0) |
e875ecea | 8449 | /* this is the earliest that rebuild will be |
d7603b7e N |
8450 | * visible in /proc/mdstat |
8451 | */ | |
8452 | md_new_event(mddev); | |
57afd89f N |
8453 | |
8454 | if (last_check + window > io_sectors || j == max_sectors) | |
1da177e4 LT |
8455 | continue; |
8456 | ||
57afd89f | 8457 | last_check = io_sectors; |
1da177e4 LT |
8458 | repeat: |
8459 | if (time_after_eq(jiffies, mark[last_mark] + SYNC_MARK_STEP )) { | |
8460 | /* step marks */ | |
8461 | int next = (last_mark+1) % SYNC_MARKS; | |
8462 | ||
8463 | mddev->resync_mark = mark[next]; | |
8464 | mddev->resync_mark_cnt = mark_cnt[next]; | |
8465 | mark[next] = jiffies; | |
57afd89f | 8466 | mark_cnt[next] = io_sectors - atomic_read(&mddev->recovery_active); |
1da177e4 LT |
8467 | last_mark = next; |
8468 | } | |
8469 | ||
c91abf5a N |
8470 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8471 | break; | |
1da177e4 LT |
8472 | |
8473 | /* | |
8474 | * this loop exits only if either when we are slower than | |
8475 | * the 'hard' speed limit, or the system was IO-idle for | |
8476 | * a jiffy. | |
8477 | * the system might be non-idle CPU-wise, but we only care | |
8478 | * about not overloading the IO subsystem. (things like an | |
8479 | * e2fsck being done on the RAID array should execute fast) | |
8480 | */ | |
1da177e4 LT |
8481 | cond_resched(); |
8482 | ||
ac7e50a3 XN |
8483 | recovery_done = io_sectors - atomic_read(&mddev->recovery_active); |
8484 | currspeed = ((unsigned long)(recovery_done - mddev->resync_mark_cnt))/2 | |
57afd89f | 8485 | /((jiffies-mddev->resync_mark)/HZ +1) +1; |
1da177e4 | 8486 | |
88202a0c | 8487 | if (currspeed > speed_min(mddev)) { |
ac8fa419 | 8488 | if (currspeed > speed_max(mddev)) { |
c0e48521 | 8489 | msleep(500); |
1da177e4 LT |
8490 | goto repeat; |
8491 | } | |
ac8fa419 N |
8492 | if (!is_mddev_idle(mddev, 0)) { |
8493 | /* | |
8494 | * Give other IO more of a chance. | |
8495 | * The faster the devices, the less we wait. | |
8496 | */ | |
8497 | wait_event(mddev->recovery_wait, | |
8498 | !atomic_read(&mddev->recovery_active)); | |
8499 | } | |
1da177e4 LT |
8500 | } |
8501 | } | |
9d48739e N |
8502 | pr_info("md: %s: %s %s.\n",mdname(mddev), desc, |
8503 | test_bit(MD_RECOVERY_INTR, &mddev->recovery) | |
8504 | ? "interrupted" : "done"); | |
1da177e4 LT |
8505 | /* |
8506 | * this also signals 'finished resyncing' to md_stop | |
8507 | */ | |
7c2c57c9 | 8508 | blk_finish_plug(&plug); |
1da177e4 LT |
8509 | wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active)); |
8510 | ||
5ed1df2e N |
8511 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8512 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
1217e1d1 | 8513 | mddev->curr_resync > 3) { |
5ed1df2e N |
8514 | mddev->curr_resync_completed = mddev->curr_resync; |
8515 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); | |
8516 | } | |
09314799 | 8517 | mddev->pers->sync_request(mddev, max_sectors, &skipped); |
1da177e4 | 8518 | |
dfc70645 | 8519 | if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) && |
1217e1d1 | 8520 | mddev->curr_resync > 3) { |
5fd6c1dc N |
8521 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
8522 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
8523 | if (mddev->curr_resync >= mddev->recovery_cp) { | |
9d48739e N |
8524 | pr_debug("md: checkpointing %s of %s.\n", |
8525 | desc, mdname(mddev)); | |
0a19caab | 8526 | if (test_bit(MD_RECOVERY_ERROR, |
8527 | &mddev->recovery)) | |
8528 | mddev->recovery_cp = | |
8529 | mddev->curr_resync_completed; | |
8530 | else | |
8531 | mddev->recovery_cp = | |
8532 | mddev->curr_resync; | |
5fd6c1dc N |
8533 | } |
8534 | } else | |
8535 | mddev->recovery_cp = MaxSector; | |
8536 | } else { | |
8537 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) | |
8538 | mddev->curr_resync = MaxSector; | |
db0505d3 N |
8539 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8540 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) { | |
8541 | rcu_read_lock(); | |
8542 | rdev_for_each_rcu(rdev, mddev) | |
8543 | if (rdev->raid_disk >= 0 && | |
8544 | mddev->delta_disks >= 0 && | |
8545 | !test_bit(Journal, &rdev->flags) && | |
8546 | !test_bit(Faulty, &rdev->flags) && | |
8547 | !test_bit(In_sync, &rdev->flags) && | |
8548 | rdev->recovery_offset < mddev->curr_resync) | |
8549 | rdev->recovery_offset = mddev->curr_resync; | |
8550 | rcu_read_unlock(); | |
8551 | } | |
5fd6c1dc | 8552 | } |
1da177e4 | 8553 | } |
db91ff55 | 8554 | skip: |
bb8bf15b GJ |
8555 | /* set CHANGE_PENDING here since maybe another update is needed, |
8556 | * so other nodes are informed. It should be harmless for normal | |
8557 | * raid */ | |
2953079c SL |
8558 | set_mask_bits(&mddev->sb_flags, 0, |
8559 | BIT(MD_SB_CHANGE_PENDING) | BIT(MD_SB_CHANGE_DEVS)); | |
c186b128 | 8560 | |
e66db6f0 BC |
8561 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8562 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
8563 | mddev->delta_disks > 0 && | |
8564 | mddev->pers->finish_reshape && | |
8565 | mddev->pers->size && | |
8566 | mddev->queue) { | |
8567 | mddev_lock_nointr(mddev); | |
8568 | md_set_array_sectors(mddev, mddev->pers->size(mddev, 0, 0)); | |
8569 | mddev_unlock(mddev); | |
8570 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
8571 | revalidate_disk(mddev->gendisk); | |
8572 | } | |
8573 | ||
23da422b | 8574 | spin_lock(&mddev->lock); |
c07b70ad N |
8575 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { |
8576 | /* We completed so min/max setting can be forgotten if used. */ | |
8577 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
8578 | mddev->resync_min = 0; | |
8579 | mddev->resync_max = MaxSector; | |
8580 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
8581 | mddev->resync_min = mddev->curr_resync_completed; | |
f7851be7 | 8582 | set_bit(MD_RECOVERY_DONE, &mddev->recovery); |
1da177e4 | 8583 | mddev->curr_resync = 0; |
23da422b N |
8584 | spin_unlock(&mddev->lock); |
8585 | ||
1da177e4 | 8586 | wake_up(&resync_wait); |
1da177e4 | 8587 | md_wakeup_thread(mddev->thread); |
c6207277 | 8588 | return; |
1da177e4 | 8589 | } |
29269553 | 8590 | EXPORT_SYMBOL_GPL(md_do_sync); |
1da177e4 | 8591 | |
746d3207 N |
8592 | static int remove_and_add_spares(struct mddev *mddev, |
8593 | struct md_rdev *this) | |
b4c4c7b8 | 8594 | { |
3cb03002 | 8595 | struct md_rdev *rdev; |
b4c4c7b8 | 8596 | int spares = 0; |
f2a371c5 | 8597 | int removed = 0; |
d787be40 | 8598 | bool remove_some = false; |
b4c4c7b8 | 8599 | |
4b74a3f3 N |
8600 | if (this && test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
8601 | /* Mustn't remove devices when resync thread is running */ | |
8602 | return 0; | |
8603 | ||
d787be40 N |
8604 | rdev_for_each(rdev, mddev) { |
8605 | if ((this == NULL || rdev == this) && | |
8606 | rdev->raid_disk >= 0 && | |
8607 | !test_bit(Blocked, &rdev->flags) && | |
8608 | test_bit(Faulty, &rdev->flags) && | |
8609 | atomic_read(&rdev->nr_pending)==0) { | |
8610 | /* Faulty non-Blocked devices with nr_pending == 0 | |
8611 | * never get nr_pending incremented, | |
8612 | * never get Faulty cleared, and never get Blocked set. | |
8613 | * So we can synchronize_rcu now rather than once per device | |
8614 | */ | |
8615 | remove_some = true; | |
8616 | set_bit(RemoveSynchronized, &rdev->flags); | |
8617 | } | |
8618 | } | |
8619 | ||
8620 | if (remove_some) | |
8621 | synchronize_rcu(); | |
8622 | rdev_for_each(rdev, mddev) { | |
746d3207 N |
8623 | if ((this == NULL || rdev == this) && |
8624 | rdev->raid_disk >= 0 && | |
6bfe0b49 | 8625 | !test_bit(Blocked, &rdev->flags) && |
d787be40 | 8626 | ((test_bit(RemoveSynchronized, &rdev->flags) || |
f2076e7d SL |
8627 | (!test_bit(In_sync, &rdev->flags) && |
8628 | !test_bit(Journal, &rdev->flags))) && | |
d787be40 | 8629 | atomic_read(&rdev->nr_pending)==0)) { |
b4c4c7b8 | 8630 | if (mddev->pers->hot_remove_disk( |
b8321b68 | 8631 | mddev, rdev) == 0) { |
36fad858 | 8632 | sysfs_unlink_rdev(mddev, rdev); |
09e00dcd | 8633 | rdev->saved_raid_disk = rdev->raid_disk; |
b4c4c7b8 | 8634 | rdev->raid_disk = -1; |
f2a371c5 | 8635 | removed++; |
b4c4c7b8 N |
8636 | } |
8637 | } | |
d787be40 N |
8638 | if (remove_some && test_bit(RemoveSynchronized, &rdev->flags)) |
8639 | clear_bit(RemoveSynchronized, &rdev->flags); | |
8640 | } | |
8641 | ||
90584fc9 JB |
8642 | if (removed && mddev->kobj.sd) |
8643 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
b4c4c7b8 | 8644 | |
2910ff17 | 8645 | if (this && removed) |
746d3207 N |
8646 | goto no_add; |
8647 | ||
dafb20fa | 8648 | rdev_for_each(rdev, mddev) { |
2910ff17 GR |
8649 | if (this && this != rdev) |
8650 | continue; | |
dbb64f86 GR |
8651 | if (test_bit(Candidate, &rdev->flags)) |
8652 | continue; | |
7bfec5f3 N |
8653 | if (rdev->raid_disk >= 0 && |
8654 | !test_bit(In_sync, &rdev->flags) && | |
f2076e7d | 8655 | !test_bit(Journal, &rdev->flags) && |
7bfec5f3 N |
8656 | !test_bit(Faulty, &rdev->flags)) |
8657 | spares++; | |
7ceb17e8 N |
8658 | if (rdev->raid_disk >= 0) |
8659 | continue; | |
8660 | if (test_bit(Faulty, &rdev->flags)) | |
8661 | continue; | |
f6b6ec5c SL |
8662 | if (!test_bit(Journal, &rdev->flags)) { |
8663 | if (mddev->ro && | |
8664 | ! (rdev->saved_raid_disk >= 0 && | |
8665 | !test_bit(Bitmap_sync, &rdev->flags))) | |
8666 | continue; | |
7ceb17e8 | 8667 | |
f6b6ec5c SL |
8668 | rdev->recovery_offset = 0; |
8669 | } | |
7ceb17e8 N |
8670 | if (mddev->pers-> |
8671 | hot_add_disk(mddev, rdev) == 0) { | |
8672 | if (sysfs_link_rdev(mddev, rdev)) | |
8673 | /* failure here is OK */; | |
f6b6ec5c SL |
8674 | if (!test_bit(Journal, &rdev->flags)) |
8675 | spares++; | |
7ceb17e8 | 8676 | md_new_event(mddev); |
2953079c | 8677 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
dfc70645 | 8678 | } |
b4c4c7b8 | 8679 | } |
746d3207 | 8680 | no_add: |
6dafab6b | 8681 | if (removed) |
2953079c | 8682 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
b4c4c7b8 N |
8683 | return spares; |
8684 | } | |
7ebc0be7 | 8685 | |
ac05f256 N |
8686 | static void md_start_sync(struct work_struct *ws) |
8687 | { | |
8688 | struct mddev *mddev = container_of(ws, struct mddev, del_work); | |
c186b128 | 8689 | |
ac05f256 N |
8690 | mddev->sync_thread = md_register_thread(md_do_sync, |
8691 | mddev, | |
8692 | "resync"); | |
8693 | if (!mddev->sync_thread) { | |
9d48739e N |
8694 | pr_warn("%s: could not start resync thread...\n", |
8695 | mdname(mddev)); | |
ac05f256 N |
8696 | /* leave the spares where they are, it shouldn't hurt */ |
8697 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
8698 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
8699 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
8700 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
8701 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 8702 | wake_up(&resync_wait); |
ac05f256 N |
8703 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
8704 | &mddev->recovery)) | |
8705 | if (mddev->sysfs_action) | |
8706 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8707 | } else | |
8708 | md_wakeup_thread(mddev->sync_thread); | |
8709 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8710 | md_new_event(mddev); | |
8711 | } | |
8712 | ||
1da177e4 LT |
8713 | /* |
8714 | * This routine is regularly called by all per-raid-array threads to | |
8715 | * deal with generic issues like resync and super-block update. | |
8716 | * Raid personalities that don't have a thread (linear/raid0) do not | |
8717 | * need this as they never do any recovery or update the superblock. | |
8718 | * | |
8719 | * It does not do any resync itself, but rather "forks" off other threads | |
8720 | * to do that as needed. | |
8721 | * When it is determined that resync is needed, we set MD_RECOVERY_RUNNING in | |
8722 | * "->recovery" and create a thread at ->sync_thread. | |
dfc70645 | 8723 | * When the thread finishes it sets MD_RECOVERY_DONE |
1da177e4 LT |
8724 | * and wakeups up this thread which will reap the thread and finish up. |
8725 | * This thread also removes any faulty devices (with nr_pending == 0). | |
8726 | * | |
8727 | * The overall approach is: | |
8728 | * 1/ if the superblock needs updating, update it. | |
8729 | * 2/ If a recovery thread is running, don't do anything else. | |
8730 | * 3/ If recovery has finished, clean up, possibly marking spares active. | |
8731 | * 4/ If there are any faulty devices, remove them. | |
8732 | * 5/ If array is degraded, try to add spares devices | |
8733 | * 6/ If array has spares or is not in-sync, start a resync thread. | |
8734 | */ | |
fd01b88c | 8735 | void md_check_recovery(struct mddev *mddev) |
1da177e4 | 8736 | { |
68866e42 JB |
8737 | if (mddev->suspended) |
8738 | return; | |
8739 | ||
5f40402d | 8740 | if (mddev->bitmap) |
aa5cbd10 | 8741 | bitmap_daemon_work(mddev); |
1da177e4 | 8742 | |
fca4d848 | 8743 | if (signal_pending(current)) { |
31a59e34 | 8744 | if (mddev->pers->sync_request && !mddev->external) { |
9d48739e N |
8745 | pr_debug("md: %s in immediate safe mode\n", |
8746 | mdname(mddev)); | |
fca4d848 N |
8747 | mddev->safemode = 2; |
8748 | } | |
8749 | flush_signals(current); | |
8750 | } | |
8751 | ||
c89a8eee N |
8752 | if (mddev->ro && !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) |
8753 | return; | |
1da177e4 | 8754 | if ( ! ( |
2953079c | 8755 | (mddev->sb_flags & ~ (1<<MD_SB_CHANGE_PENDING)) || |
1da177e4 | 8756 | test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
fca4d848 | 8757 | test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
31a59e34 | 8758 | (mddev->external == 0 && mddev->safemode == 1) || |
4ad23a97 | 8759 | (mddev->safemode == 2 |
fca4d848 | 8760 | && !mddev->in_sync && mddev->recovery_cp == MaxSector) |
1da177e4 LT |
8761 | )) |
8762 | return; | |
fca4d848 | 8763 | |
df5b89b3 | 8764 | if (mddev_trylock(mddev)) { |
b4c4c7b8 | 8765 | int spares = 0; |
fca4d848 | 8766 | |
afc1f55c | 8767 | if (!mddev->external && mddev->safemode == 1) |
33182d15 N |
8768 | mddev->safemode = 0; |
8769 | ||
c89a8eee | 8770 | if (mddev->ro) { |
ab16bfc7 NB |
8771 | struct md_rdev *rdev; |
8772 | if (!mddev->external && mddev->in_sync) | |
8773 | /* 'Blocked' flag not needed as failed devices | |
8774 | * will be recorded if array switched to read/write. | |
8775 | * Leaving it set will prevent the device | |
8776 | * from being removed. | |
8777 | */ | |
8778 | rdev_for_each(rdev, mddev) | |
8779 | clear_bit(Blocked, &rdev->flags); | |
7ceb17e8 N |
8780 | /* On a read-only array we can: |
8781 | * - remove failed devices | |
8782 | * - add already-in_sync devices if the array itself | |
8783 | * is in-sync. | |
8784 | * As we only add devices that are already in-sync, | |
8785 | * we can activate the spares immediately. | |
c89a8eee | 8786 | */ |
7ceb17e8 | 8787 | remove_and_add_spares(mddev, NULL); |
8313b8e5 N |
8788 | /* There is no thread, but we need to call |
8789 | * ->spare_active and clear saved_raid_disk | |
8790 | */ | |
2ac295a5 | 8791 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8313b8e5 | 8792 | md_reap_sync_thread(mddev); |
a4a3d26d | 8793 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
8313b8e5 | 8794 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
2953079c | 8795 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
c89a8eee N |
8796 | goto unlock; |
8797 | } | |
8798 | ||
659b254f GJ |
8799 | if (mddev_is_clustered(mddev)) { |
8800 | struct md_rdev *rdev; | |
8801 | /* kick the device if another node issued a | |
8802 | * remove disk. | |
8803 | */ | |
8804 | rdev_for_each(rdev, mddev) { | |
8805 | if (test_and_clear_bit(ClusterRemove, &rdev->flags) && | |
8806 | rdev->raid_disk < 0) | |
8807 | md_kick_rdev_from_array(rdev); | |
8808 | } | |
8809 | } | |
8810 | ||
6497709b | 8811 | if (!mddev->external && !mddev->in_sync) { |
85572d7c | 8812 | spin_lock(&mddev->lock); |
6497709b | 8813 | set_in_sync(mddev); |
85572d7c | 8814 | spin_unlock(&mddev->lock); |
fca4d848 | 8815 | } |
fca4d848 | 8816 | |
2953079c | 8817 | if (mddev->sb_flags) |
850b2b42 | 8818 | md_update_sb(mddev, 0); |
06d91a5f | 8819 | |
1da177e4 LT |
8820 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
8821 | !test_bit(MD_RECOVERY_DONE, &mddev->recovery)) { | |
8822 | /* resync/recovery still happening */ | |
8823 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8824 | goto unlock; | |
8825 | } | |
8826 | if (mddev->sync_thread) { | |
a91d5ac0 | 8827 | md_reap_sync_thread(mddev); |
1da177e4 LT |
8828 | goto unlock; |
8829 | } | |
72a23c21 NB |
8830 | /* Set RUNNING before clearing NEEDED to avoid |
8831 | * any transients in the value of "sync_action". | |
8832 | */ | |
72f36d59 | 8833 | mddev->curr_resync_completed = 0; |
23da422b | 8834 | spin_lock(&mddev->lock); |
72a23c21 | 8835 | set_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
23da422b | 8836 | spin_unlock(&mddev->lock); |
24dd469d N |
8837 | /* Clear some bits that don't mean anything, but |
8838 | * might be left set | |
8839 | */ | |
24dd469d N |
8840 | clear_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8841 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); | |
1da177e4 | 8842 | |
ed209584 N |
8843 | if (!test_and_clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
8844 | test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) | |
ac05f256 | 8845 | goto not_running; |
1da177e4 LT |
8846 | /* no recovery is running. |
8847 | * remove any failed drives, then | |
8848 | * add spares if possible. | |
72f36d59 | 8849 | * Spares are also removed and re-added, to allow |
1da177e4 LT |
8850 | * the personality to fail the re-add. |
8851 | */ | |
1da177e4 | 8852 | |
b4c4c7b8 | 8853 | if (mddev->reshape_position != MaxSector) { |
50ac168a N |
8854 | if (mddev->pers->check_reshape == NULL || |
8855 | mddev->pers->check_reshape(mddev) != 0) | |
b4c4c7b8 | 8856 | /* Cannot proceed */ |
ac05f256 | 8857 | goto not_running; |
b4c4c7b8 | 8858 | set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); |
72a23c21 | 8859 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
746d3207 | 8860 | } else if ((spares = remove_and_add_spares(mddev, NULL))) { |
24dd469d N |
8861 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
8862 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
56ac36d7 | 8863 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
72a23c21 | 8864 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
8865 | } else if (mddev->recovery_cp < MaxSector) { |
8866 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
72a23c21 | 8867 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
8868 | } else if (!test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) |
8869 | /* nothing to be done ... */ | |
ac05f256 | 8870 | goto not_running; |
24dd469d | 8871 | |
1da177e4 | 8872 | if (mddev->pers->sync_request) { |
ef99bf48 | 8873 | if (spares) { |
a654b9d8 N |
8874 | /* We are adding a device or devices to an array |
8875 | * which has the bitmap stored on all devices. | |
8876 | * So make sure all bitmap pages get written | |
8877 | */ | |
8878 | bitmap_write_all(mddev->bitmap); | |
8879 | } | |
ac05f256 N |
8880 | INIT_WORK(&mddev->del_work, md_start_sync); |
8881 | queue_work(md_misc_wq, &mddev->del_work); | |
8882 | goto unlock; | |
1da177e4 | 8883 | } |
ac05f256 | 8884 | not_running: |
72a23c21 NB |
8885 | if (!mddev->sync_thread) { |
8886 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 8887 | wake_up(&resync_wait); |
72a23c21 NB |
8888 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
8889 | &mddev->recovery)) | |
0c3573f1 | 8890 | if (mddev->sysfs_action) |
00bcb4ac | 8891 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
72a23c21 | 8892 | } |
ac05f256 N |
8893 | unlock: |
8894 | wake_up(&mddev->sb_wait); | |
1da177e4 | 8895 | mddev_unlock(mddev); |
35bfc521 N |
8896 | } else if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags) && mddev->sb_flags) { |
8897 | /* Write superblock - thread that called mddev_suspend() | |
8898 | * holds reconfig_mutex for us. | |
8899 | */ | |
8900 | set_bit(MD_UPDATING_SB, &mddev->flags); | |
8901 | smp_mb__after_atomic(); | |
8902 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags)) | |
8903 | md_update_sb(mddev, 0); | |
8904 | clear_bit_unlock(MD_UPDATING_SB, &mddev->flags); | |
8905 | wake_up(&mddev->sb_wait); | |
1da177e4 LT |
8906 | } |
8907 | } | |
6c144d31 | 8908 | EXPORT_SYMBOL(md_check_recovery); |
1da177e4 | 8909 | |
a91d5ac0 JB |
8910 | void md_reap_sync_thread(struct mddev *mddev) |
8911 | { | |
8912 | struct md_rdev *rdev; | |
8913 | ||
8914 | /* resync has finished, collect result */ | |
8915 | md_unregister_thread(&mddev->sync_thread); | |
8916 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
8917 | !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
8918 | /* success...*/ | |
8919 | /* activate any spares */ | |
8920 | if (mddev->pers->spare_active(mddev)) { | |
8921 | sysfs_notify(&mddev->kobj, NULL, | |
8922 | "degraded"); | |
2953079c | 8923 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a91d5ac0 JB |
8924 | } |
8925 | } | |
8926 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
8927 | mddev->pers->finish_reshape) | |
8928 | mddev->pers->finish_reshape(mddev); | |
8929 | ||
8930 | /* If array is no-longer degraded, then any saved_raid_disk | |
f466722c | 8931 | * information must be scrapped. |
a91d5ac0 | 8932 | */ |
f466722c N |
8933 | if (!mddev->degraded) |
8934 | rdev_for_each(rdev, mddev) | |
a91d5ac0 JB |
8935 | rdev->saved_raid_disk = -1; |
8936 | ||
8937 | md_update_sb(mddev, 1); | |
2953079c | 8938 | /* MD_SB_CHANGE_PENDING should be cleared by md_update_sb, so we can |
bb8bf15b GJ |
8939 | * call resync_finish here if MD_CLUSTER_RESYNC_LOCKED is set by |
8940 | * clustered raid */ | |
8941 | if (test_and_clear_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags)) | |
8942 | md_cluster_ops->resync_finish(mddev); | |
a91d5ac0 | 8943 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
ea358cd0 | 8944 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); |
a91d5ac0 JB |
8945 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
8946 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
8947 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
8948 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
f851b60d | 8949 | wake_up(&resync_wait); |
a91d5ac0 JB |
8950 | /* flag recovery needed just to double check */ |
8951 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8952 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8953 | md_new_event(mddev); | |
8954 | if (mddev->event_work.func) | |
8955 | queue_work(md_misc_wq, &mddev->event_work); | |
8956 | } | |
6c144d31 | 8957 | EXPORT_SYMBOL(md_reap_sync_thread); |
a91d5ac0 | 8958 | |
fd01b88c | 8959 | void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev) |
6bfe0b49 | 8960 | { |
00bcb4ac | 8961 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
6bfe0b49 | 8962 | wait_event_timeout(rdev->blocked_wait, |
de393cde N |
8963 | !test_bit(Blocked, &rdev->flags) && |
8964 | !test_bit(BlockedBadBlocks, &rdev->flags), | |
6bfe0b49 DW |
8965 | msecs_to_jiffies(5000)); |
8966 | rdev_dec_pending(rdev, mddev); | |
8967 | } | |
8968 | EXPORT_SYMBOL(md_wait_for_blocked_rdev); | |
8969 | ||
c6563a8c N |
8970 | void md_finish_reshape(struct mddev *mddev) |
8971 | { | |
8972 | /* called be personality module when reshape completes. */ | |
8973 | struct md_rdev *rdev; | |
8974 | ||
8975 | rdev_for_each(rdev, mddev) { | |
8976 | if (rdev->data_offset > rdev->new_data_offset) | |
8977 | rdev->sectors += rdev->data_offset - rdev->new_data_offset; | |
8978 | else | |
8979 | rdev->sectors -= rdev->new_data_offset - rdev->data_offset; | |
8980 | rdev->data_offset = rdev->new_data_offset; | |
8981 | } | |
8982 | } | |
8983 | EXPORT_SYMBOL(md_finish_reshape); | |
2230dfe4 | 8984 | |
fc974ee2 | 8985 | /* Bad block management */ |
2230dfe4 | 8986 | |
fc974ee2 | 8987 | /* Returns 1 on success, 0 on failure */ |
3cb03002 | 8988 | int rdev_set_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
c6563a8c | 8989 | int is_new) |
2230dfe4 | 8990 | { |
85ad1d13 | 8991 | struct mddev *mddev = rdev->mddev; |
c6563a8c N |
8992 | int rv; |
8993 | if (is_new) | |
8994 | s += rdev->new_data_offset; | |
8995 | else | |
8996 | s += rdev->data_offset; | |
fc974ee2 VV |
8997 | rv = badblocks_set(&rdev->badblocks, s, sectors, 0); |
8998 | if (rv == 0) { | |
2230dfe4 | 8999 | /* Make sure they get written out promptly */ |
35b785f7 TM |
9000 | if (test_bit(ExternalBbl, &rdev->flags)) |
9001 | sysfs_notify(&rdev->kobj, NULL, | |
9002 | "unacknowledged_bad_blocks"); | |
8bd2f0a0 | 9003 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
2953079c SL |
9004 | set_mask_bits(&mddev->sb_flags, 0, |
9005 | BIT(MD_SB_CHANGE_CLEAN) | BIT(MD_SB_CHANGE_PENDING)); | |
2230dfe4 | 9006 | md_wakeup_thread(rdev->mddev->thread); |
fc974ee2 VV |
9007 | return 1; |
9008 | } else | |
9009 | return 0; | |
2230dfe4 N |
9010 | } |
9011 | EXPORT_SYMBOL_GPL(rdev_set_badblocks); | |
9012 | ||
c6563a8c N |
9013 | int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
9014 | int is_new) | |
2230dfe4 | 9015 | { |
35b785f7 | 9016 | int rv; |
c6563a8c N |
9017 | if (is_new) |
9018 | s += rdev->new_data_offset; | |
9019 | else | |
9020 | s += rdev->data_offset; | |
35b785f7 TM |
9021 | rv = badblocks_clear(&rdev->badblocks, s, sectors); |
9022 | if ((rv == 0) && test_bit(ExternalBbl, &rdev->flags)) | |
9023 | sysfs_notify(&rdev->kobj, NULL, "bad_blocks"); | |
9024 | return rv; | |
2230dfe4 N |
9025 | } |
9026 | EXPORT_SYMBOL_GPL(rdev_clear_badblocks); | |
9027 | ||
75c96f85 AB |
9028 | static int md_notify_reboot(struct notifier_block *this, |
9029 | unsigned long code, void *x) | |
1da177e4 LT |
9030 | { |
9031 | struct list_head *tmp; | |
fd01b88c | 9032 | struct mddev *mddev; |
2dba6a91 | 9033 | int need_delay = 0; |
1da177e4 | 9034 | |
c744a65c N |
9035 | for_each_mddev(mddev, tmp) { |
9036 | if (mddev_trylock(mddev)) { | |
30b8aa91 N |
9037 | if (mddev->pers) |
9038 | __md_stop_writes(mddev); | |
0f62fb22 N |
9039 | if (mddev->persistent) |
9040 | mddev->safemode = 2; | |
c744a65c | 9041 | mddev_unlock(mddev); |
2dba6a91 | 9042 | } |
c744a65c | 9043 | need_delay = 1; |
1da177e4 | 9044 | } |
c744a65c N |
9045 | /* |
9046 | * certain more exotic SCSI devices are known to be | |
9047 | * volatile wrt too early system reboots. While the | |
9048 | * right place to handle this issue is the given | |
9049 | * driver, we do want to have a safe RAID driver ... | |
9050 | */ | |
9051 | if (need_delay) | |
9052 | mdelay(1000*1); | |
9053 | ||
1da177e4 LT |
9054 | return NOTIFY_DONE; |
9055 | } | |
9056 | ||
75c96f85 | 9057 | static struct notifier_block md_notifier = { |
1da177e4 LT |
9058 | .notifier_call = md_notify_reboot, |
9059 | .next = NULL, | |
9060 | .priority = INT_MAX, /* before any real devices */ | |
9061 | }; | |
9062 | ||
9063 | static void md_geninit(void) | |
9064 | { | |
36a4e1fe | 9065 | pr_debug("md: sizeof(mdp_super_t) = %d\n", (int)sizeof(mdp_super_t)); |
1da177e4 | 9066 | |
c7705f34 | 9067 | proc_create("mdstat", S_IRUGO, NULL, &md_seq_fops); |
1da177e4 LT |
9068 | } |
9069 | ||
75c96f85 | 9070 | static int __init md_init(void) |
1da177e4 | 9071 | { |
e804ac78 TH |
9072 | int ret = -ENOMEM; |
9073 | ||
ada609ee | 9074 | md_wq = alloc_workqueue("md", WQ_MEM_RECLAIM, 0); |
e804ac78 TH |
9075 | if (!md_wq) |
9076 | goto err_wq; | |
9077 | ||
9078 | md_misc_wq = alloc_workqueue("md_misc", 0, 0); | |
9079 | if (!md_misc_wq) | |
9080 | goto err_misc_wq; | |
9081 | ||
9082 | if ((ret = register_blkdev(MD_MAJOR, "md")) < 0) | |
9083 | goto err_md; | |
9084 | ||
9085 | if ((ret = register_blkdev(0, "mdp")) < 0) | |
9086 | goto err_mdp; | |
9087 | mdp_major = ret; | |
9088 | ||
af5628f0 | 9089 | blk_register_region(MKDEV(MD_MAJOR, 0), 512, THIS_MODULE, |
e8703fe1 N |
9090 | md_probe, NULL, NULL); |
9091 | blk_register_region(MKDEV(mdp_major, 0), 1UL<<MINORBITS, THIS_MODULE, | |
1da177e4 LT |
9092 | md_probe, NULL, NULL); |
9093 | ||
1da177e4 | 9094 | register_reboot_notifier(&md_notifier); |
0b4d4147 | 9095 | raid_table_header = register_sysctl_table(raid_root_table); |
1da177e4 LT |
9096 | |
9097 | md_geninit(); | |
d710e138 | 9098 | return 0; |
1da177e4 | 9099 | |
e804ac78 TH |
9100 | err_mdp: |
9101 | unregister_blkdev(MD_MAJOR, "md"); | |
9102 | err_md: | |
9103 | destroy_workqueue(md_misc_wq); | |
9104 | err_misc_wq: | |
9105 | destroy_workqueue(md_wq); | |
9106 | err_wq: | |
9107 | return ret; | |
9108 | } | |
1da177e4 | 9109 | |
70bcecdb | 9110 | static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev) |
1d7e3e96 | 9111 | { |
70bcecdb GR |
9112 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
9113 | struct md_rdev *rdev2; | |
9114 | int role, ret; | |
9115 | char b[BDEVNAME_SIZE]; | |
1d7e3e96 | 9116 | |
818da59f GJ |
9117 | /* |
9118 | * If size is changed in another node then we need to | |
9119 | * do resize as well. | |
9120 | */ | |
9121 | if (mddev->dev_sectors != le64_to_cpu(sb->size)) { | |
9122 | ret = mddev->pers->resize(mddev, le64_to_cpu(sb->size)); | |
9123 | if (ret) | |
9124 | pr_info("md-cluster: resize failed\n"); | |
9125 | else | |
9126 | bitmap_update_sb(mddev->bitmap); | |
9127 | } | |
9128 | ||
70bcecdb GR |
9129 | /* Check for change of roles in the active devices */ |
9130 | rdev_for_each(rdev2, mddev) { | |
9131 | if (test_bit(Faulty, &rdev2->flags)) | |
9132 | continue; | |
9133 | ||
9134 | /* Check if the roles changed */ | |
9135 | role = le16_to_cpu(sb->dev_roles[rdev2->desc_nr]); | |
dbb64f86 GR |
9136 | |
9137 | if (test_bit(Candidate, &rdev2->flags)) { | |
9138 | if (role == 0xfffe) { | |
9139 | pr_info("md: Removing Candidate device %s because add failed\n", bdevname(rdev2->bdev,b)); | |
9140 | md_kick_rdev_from_array(rdev2); | |
9141 | continue; | |
9142 | } | |
9143 | else | |
9144 | clear_bit(Candidate, &rdev2->flags); | |
9145 | } | |
9146 | ||
70bcecdb GR |
9147 | if (role != rdev2->raid_disk) { |
9148 | /* got activated */ | |
9149 | if (rdev2->raid_disk == -1 && role != 0xffff) { | |
9150 | rdev2->saved_raid_disk = role; | |
9151 | ret = remove_and_add_spares(mddev, rdev2); | |
9152 | pr_info("Activated spare: %s\n", | |
9d48739e | 9153 | bdevname(rdev2->bdev,b)); |
a578183e GJ |
9154 | /* wakeup mddev->thread here, so array could |
9155 | * perform resync with the new activated disk */ | |
9156 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9157 | md_wakeup_thread(mddev->thread); | |
9158 | ||
70bcecdb GR |
9159 | } |
9160 | /* device faulty | |
9161 | * We just want to do the minimum to mark the disk | |
9162 | * as faulty. The recovery is performed by the | |
9163 | * one who initiated the error. | |
9164 | */ | |
9165 | if ((role == 0xfffe) || (role == 0xfffd)) { | |
9166 | md_error(mddev, rdev2); | |
9167 | clear_bit(Blocked, &rdev2->flags); | |
9168 | } | |
9169 | } | |
1d7e3e96 | 9170 | } |
70bcecdb | 9171 | |
28c1b9fd GR |
9172 | if (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) |
9173 | update_raid_disks(mddev, le32_to_cpu(sb->raid_disks)); | |
70bcecdb GR |
9174 | |
9175 | /* Finally set the event to be up to date */ | |
9176 | mddev->events = le64_to_cpu(sb->events); | |
9177 | } | |
9178 | ||
9179 | static int read_rdev(struct mddev *mddev, struct md_rdev *rdev) | |
9180 | { | |
9181 | int err; | |
9182 | struct page *swapout = rdev->sb_page; | |
9183 | struct mdp_superblock_1 *sb; | |
9184 | ||
9185 | /* Store the sb page of the rdev in the swapout temporary | |
9186 | * variable in case we err in the future | |
9187 | */ | |
9188 | rdev->sb_page = NULL; | |
7f0f0d87 N |
9189 | err = alloc_disk_sb(rdev); |
9190 | if (err == 0) { | |
9191 | ClearPageUptodate(rdev->sb_page); | |
9192 | rdev->sb_loaded = 0; | |
9193 | err = super_types[mddev->major_version]. | |
9194 | load_super(rdev, NULL, mddev->minor_version); | |
9195 | } | |
70bcecdb GR |
9196 | if (err < 0) { |
9197 | pr_warn("%s: %d Could not reload rdev(%d) err: %d. Restoring old values\n", | |
9198 | __func__, __LINE__, rdev->desc_nr, err); | |
7f0f0d87 N |
9199 | if (rdev->sb_page) |
9200 | put_page(rdev->sb_page); | |
70bcecdb GR |
9201 | rdev->sb_page = swapout; |
9202 | rdev->sb_loaded = 1; | |
9203 | return err; | |
1d7e3e96 GR |
9204 | } |
9205 | ||
70bcecdb GR |
9206 | sb = page_address(rdev->sb_page); |
9207 | /* Read the offset unconditionally, even if MD_FEATURE_RECOVERY_OFFSET | |
9208 | * is not set | |
9209 | */ | |
9210 | ||
9211 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)) | |
9212 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); | |
9213 | ||
9214 | /* The other node finished recovery, call spare_active to set | |
9215 | * device In_sync and mddev->degraded | |
9216 | */ | |
9217 | if (rdev->recovery_offset == MaxSector && | |
9218 | !test_bit(In_sync, &rdev->flags) && | |
9219 | mddev->pers->spare_active(mddev)) | |
9220 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
9221 | ||
9222 | put_page(swapout); | |
9223 | return 0; | |
9224 | } | |
9225 | ||
9226 | void md_reload_sb(struct mddev *mddev, int nr) | |
9227 | { | |
9228 | struct md_rdev *rdev; | |
9229 | int err; | |
9230 | ||
9231 | /* Find the rdev */ | |
9232 | rdev_for_each_rcu(rdev, mddev) { | |
9233 | if (rdev->desc_nr == nr) | |
9234 | break; | |
9235 | } | |
9236 | ||
9237 | if (!rdev || rdev->desc_nr != nr) { | |
9238 | pr_warn("%s: %d Could not find rdev with nr %d\n", __func__, __LINE__, nr); | |
9239 | return; | |
9240 | } | |
9241 | ||
9242 | err = read_rdev(mddev, rdev); | |
9243 | if (err < 0) | |
9244 | return; | |
9245 | ||
9246 | check_sb_changes(mddev, rdev); | |
9247 | ||
9248 | /* Read all rdev's to update recovery_offset */ | |
9249 | rdev_for_each_rcu(rdev, mddev) | |
9250 | read_rdev(mddev, rdev); | |
1d7e3e96 GR |
9251 | } |
9252 | EXPORT_SYMBOL(md_reload_sb); | |
9253 | ||
1da177e4 LT |
9254 | #ifndef MODULE |
9255 | ||
9256 | /* | |
9257 | * Searches all registered partitions for autorun RAID arrays | |
9258 | * at boot time. | |
9259 | */ | |
4d936ec1 | 9260 | |
5b1f5bc3 | 9261 | static DEFINE_MUTEX(detected_devices_mutex); |
4d936ec1 ME |
9262 | static LIST_HEAD(all_detected_devices); |
9263 | struct detected_devices_node { | |
9264 | struct list_head list; | |
9265 | dev_t dev; | |
9266 | }; | |
1da177e4 LT |
9267 | |
9268 | void md_autodetect_dev(dev_t dev) | |
9269 | { | |
4d936ec1 ME |
9270 | struct detected_devices_node *node_detected_dev; |
9271 | ||
9272 | node_detected_dev = kzalloc(sizeof(*node_detected_dev), GFP_KERNEL); | |
9273 | if (node_detected_dev) { | |
9274 | node_detected_dev->dev = dev; | |
5b1f5bc3 | 9275 | mutex_lock(&detected_devices_mutex); |
4d936ec1 | 9276 | list_add_tail(&node_detected_dev->list, &all_detected_devices); |
5b1f5bc3 | 9277 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9278 | } |
1da177e4 LT |
9279 | } |
9280 | ||
1da177e4 LT |
9281 | static void autostart_arrays(int part) |
9282 | { | |
3cb03002 | 9283 | struct md_rdev *rdev; |
4d936ec1 ME |
9284 | struct detected_devices_node *node_detected_dev; |
9285 | dev_t dev; | |
9286 | int i_scanned, i_passed; | |
1da177e4 | 9287 | |
4d936ec1 ME |
9288 | i_scanned = 0; |
9289 | i_passed = 0; | |
1da177e4 | 9290 | |
9d48739e | 9291 | pr_info("md: Autodetecting RAID arrays.\n"); |
1da177e4 | 9292 | |
5b1f5bc3 | 9293 | mutex_lock(&detected_devices_mutex); |
4d936ec1 ME |
9294 | while (!list_empty(&all_detected_devices) && i_scanned < INT_MAX) { |
9295 | i_scanned++; | |
9296 | node_detected_dev = list_entry(all_detected_devices.next, | |
9297 | struct detected_devices_node, list); | |
9298 | list_del(&node_detected_dev->list); | |
9299 | dev = node_detected_dev->dev; | |
9300 | kfree(node_detected_dev); | |
90bcf133 | 9301 | mutex_unlock(&detected_devices_mutex); |
df968c4e | 9302 | rdev = md_import_device(dev,0, 90); |
90bcf133 | 9303 | mutex_lock(&detected_devices_mutex); |
1da177e4 LT |
9304 | if (IS_ERR(rdev)) |
9305 | continue; | |
9306 | ||
403df478 | 9307 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 9308 | continue; |
403df478 | 9309 | |
d0fae18f | 9310 | set_bit(AutoDetected, &rdev->flags); |
1da177e4 | 9311 | list_add(&rdev->same_set, &pending_raid_disks); |
4d936ec1 | 9312 | i_passed++; |
1da177e4 | 9313 | } |
5b1f5bc3 | 9314 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9315 | |
9d48739e | 9316 | pr_debug("md: Scanned %d and added %d devices.\n", i_scanned, i_passed); |
1da177e4 LT |
9317 | |
9318 | autorun_devices(part); | |
9319 | } | |
9320 | ||
fdee8ae4 | 9321 | #endif /* !MODULE */ |
1da177e4 LT |
9322 | |
9323 | static __exit void md_exit(void) | |
9324 | { | |
fd01b88c | 9325 | struct mddev *mddev; |
1da177e4 | 9326 | struct list_head *tmp; |
e2f23b60 | 9327 | int delay = 1; |
8ab5e4c1 | 9328 | |
af5628f0 | 9329 | blk_unregister_region(MKDEV(MD_MAJOR,0), 512); |
e8703fe1 | 9330 | blk_unregister_region(MKDEV(mdp_major,0), 1U << MINORBITS); |
1da177e4 | 9331 | |
3dbd8c2e | 9332 | unregister_blkdev(MD_MAJOR,"md"); |
1da177e4 LT |
9333 | unregister_blkdev(mdp_major, "mdp"); |
9334 | unregister_reboot_notifier(&md_notifier); | |
9335 | unregister_sysctl_table(raid_table_header); | |
e2f23b60 N |
9336 | |
9337 | /* We cannot unload the modules while some process is | |
9338 | * waiting for us in select() or poll() - wake them up | |
9339 | */ | |
9340 | md_unloading = 1; | |
9341 | while (waitqueue_active(&md_event_waiters)) { | |
9342 | /* not safe to leave yet */ | |
9343 | wake_up(&md_event_waiters); | |
9344 | msleep(delay); | |
9345 | delay += delay; | |
9346 | } | |
1da177e4 | 9347 | remove_proc_entry("mdstat", NULL); |
e2f23b60 | 9348 | |
29ac4aa3 | 9349 | for_each_mddev(mddev, tmp) { |
1da177e4 | 9350 | export_array(mddev); |
9356863c | 9351 | mddev->ctime = 0; |
d3374825 | 9352 | mddev->hold_active = 0; |
9356863c N |
9353 | /* |
9354 | * for_each_mddev() will call mddev_put() at the end of each | |
9355 | * iteration. As the mddev is now fully clear, this will | |
9356 | * schedule the mddev for destruction by a workqueue, and the | |
9357 | * destroy_workqueue() below will wait for that to complete. | |
9358 | */ | |
1da177e4 | 9359 | } |
e804ac78 TH |
9360 | destroy_workqueue(md_misc_wq); |
9361 | destroy_workqueue(md_wq); | |
1da177e4 LT |
9362 | } |
9363 | ||
685784aa | 9364 | subsys_initcall(md_init); |
1da177e4 LT |
9365 | module_exit(md_exit) |
9366 | ||
e4dca7b7 | 9367 | static int get_ro(char *buffer, const struct kernel_param *kp) |
f91de92e N |
9368 | { |
9369 | return sprintf(buffer, "%d", start_readonly); | |
9370 | } | |
e4dca7b7 | 9371 | static int set_ro(const char *val, const struct kernel_param *kp) |
f91de92e | 9372 | { |
4c9309c0 | 9373 | return kstrtouint(val, 10, (unsigned int *)&start_readonly); |
f91de92e N |
9374 | } |
9375 | ||
80ca3a44 N |
9376 | module_param_call(start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR); |
9377 | module_param(start_dirty_degraded, int, S_IRUGO|S_IWUSR); | |
efeb53c0 | 9378 | module_param_call(new_array, add_named_array, NULL, NULL, S_IWUSR); |
78b6350d | 9379 | module_param(create_on_open, bool, S_IRUSR|S_IWUSR); |
f91de92e | 9380 | |
1da177e4 | 9381 | MODULE_LICENSE("GPL"); |
0efb9e61 | 9382 | MODULE_DESCRIPTION("MD RAID framework"); |
aa1595e9 | 9383 | MODULE_ALIAS("md"); |
72008652 | 9384 | MODULE_ALIAS_BLOCKDEV_MAJOR(MD_MAJOR); |