Commit | Line | Data |
---|---|---|
af1a8899 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | md.c : Multiple Devices driver for Linux | |
f72ffdd6 | 4 | Copyright (C) 1998, 1999, 2000 Ingo Molnar |
1da177e4 LT |
5 | |
6 | completely rewritten, based on the MD driver code from Marc Zyngier | |
7 | ||
8 | Changes: | |
9 | ||
10 | - RAID-1/RAID-5 extensions by Miguel de Icaza, Gadi Oxman, Ingo Molnar | |
11 | - RAID-6 extensions by H. Peter Anvin <hpa@zytor.com> | |
12 | - boot support for linear and striped mode by Harald Hoyer <HarryH@Royal.Net> | |
13 | - kerneld support by Boris Tobotras <boris@xtalk.msk.su> | |
14 | - kmod support by: Cyrus Durgin | |
15 | - RAID0 bugfixes: Mark Anthony Lisher <markal@iname.com> | |
16 | - Devfs support by Richard Gooch <rgooch@atnf.csiro.au> | |
17 | ||
18 | - lots of fixes and improvements to the RAID1/RAID5 and generic | |
19 | RAID code (such as request based resynchronization): | |
20 | ||
21 | Neil Brown <neilb@cse.unsw.edu.au>. | |
22 | ||
32a7627c N |
23 | - persistent bitmap code |
24 | Copyright (C) 2003-2004, Paul Clements, SteelEye Technology, Inc. | |
25 | ||
9d48739e N |
26 | |
27 | Errors, Warnings, etc. | |
28 | Please use: | |
29 | pr_crit() for error conditions that risk data loss | |
30 | pr_err() for error conditions that are unexpected, like an IO error | |
31 | or internal inconsistency | |
32 | pr_warn() for error conditions that could have been predicated, like | |
33 | adding a device to an array when it has incompatible metadata | |
34 | pr_info() for every interesting, very rare events, like an array starting | |
35 | or stopping, or resync starting or stopping | |
36 | pr_debug() for everything else. | |
37 | ||
1da177e4 LT |
38 | */ |
39 | ||
963c555e | 40 | #include <linux/sched/mm.h> |
3f07c014 | 41 | #include <linux/sched/signal.h> |
a6fb0934 | 42 | #include <linux/kthread.h> |
bff61975 | 43 | #include <linux/blkdev.h> |
fe45e630 | 44 | #include <linux/blk-integrity.h> |
fc974ee2 | 45 | #include <linux/badblocks.h> |
1da177e4 | 46 | #include <linux/sysctl.h> |
bff61975 | 47 | #include <linux/seq_file.h> |
ff01bb48 | 48 | #include <linux/fs.h> |
d7603b7e | 49 | #include <linux/poll.h> |
16f17b39 | 50 | #include <linux/ctype.h> |
e7d2860b | 51 | #include <linux/string.h> |
fb4d8c76 N |
52 | #include <linux/hdreg.h> |
53 | #include <linux/proc_fs.h> | |
54 | #include <linux/random.h> | |
b81e0c23 | 55 | #include <linux/major.h> |
056075c7 | 56 | #include <linux/module.h> |
fb4d8c76 | 57 | #include <linux/reboot.h> |
32a7627c | 58 | #include <linux/file.h> |
aa98aa31 | 59 | #include <linux/compat.h> |
25570727 | 60 | #include <linux/delay.h> |
bff61975 N |
61 | #include <linux/raid/md_p.h> |
62 | #include <linux/raid/md_u.h> | |
74cc979c | 63 | #include <linux/raid/detect.h> |
5a0e3ad6 | 64 | #include <linux/slab.h> |
4ad23a97 | 65 | #include <linux/percpu-refcount.h> |
c6a564ff | 66 | #include <linux/part_stat.h> |
4ad23a97 | 67 | |
504634f6 | 68 | #include <trace/events/block.h> |
43b2e5d8 | 69 | #include "md.h" |
935fe098 | 70 | #include "md-bitmap.h" |
edb39c9d | 71 | #include "md-cluster.h" |
1da177e4 | 72 | |
01f96c0a N |
73 | /* pers_list is a list of registered personalities protected |
74 | * by pers_lock. | |
75 | * pers_lock does extra service to protect accesses to | |
76 | * mddev->thread when the mutex cannot be held. | |
77 | */ | |
2604b703 | 78 | static LIST_HEAD(pers_list); |
1da177e4 LT |
79 | static DEFINE_SPINLOCK(pers_lock); |
80 | ||
4d72a9de | 81 | static const struct kobj_type md_ktype; |
28dec870 | 82 | |
edb39c9d | 83 | struct md_cluster_operations *md_cluster_ops; |
589a1c49 | 84 | EXPORT_SYMBOL(md_cluster_ops); |
2b598ee5 | 85 | static struct module *md_cluster_mod; |
edb39c9d | 86 | |
90b08710 | 87 | static DECLARE_WAIT_QUEUE_HEAD(resync_wait); |
e804ac78 TH |
88 | static struct workqueue_struct *md_wq; |
89 | static struct workqueue_struct *md_misc_wq; | |
cc1ffe61 | 90 | static struct workqueue_struct *md_rdev_misc_wq; |
90b08710 | 91 | |
746d3207 N |
92 | static int remove_and_add_spares(struct mddev *mddev, |
93 | struct md_rdev *this); | |
5aa61f42 | 94 | static void mddev_detach(struct mddev *mddev); |
746d3207 | 95 | |
f97a5528 YB |
96 | enum md_ro_state { |
97 | MD_RDWR, | |
98 | MD_RDONLY, | |
99 | MD_AUTO_READ, | |
100 | MD_MAX_STATE | |
101 | }; | |
102 | ||
103 | static bool md_is_rdwr(struct mddev *mddev) | |
104 | { | |
105 | return (mddev->ro == MD_RDWR); | |
106 | } | |
107 | ||
1e50915f RB |
108 | /* |
109 | * Default number of read corrections we'll attempt on an rdev | |
110 | * before ejecting it from the array. We divide the read error | |
111 | * count by 2 for every hour elapsed between read errors. | |
112 | */ | |
113 | #define MD_DEFAULT_MAX_CORRECTED_READ_ERRORS 20 | |
7c9d5c54 ZH |
114 | /* Default safemode delay: 200 msec */ |
115 | #define DEFAULT_SAFEMODE_DELAY ((200 * HZ)/1000 +1) | |
1da177e4 LT |
116 | /* |
117 | * Current RAID-1,4,5 parallel reconstruction 'guaranteed speed limit' | |
118 | * is 1000 KB/sec, so the extra system load does not show up that much. | |
119 | * Increase it if you want to have more _guaranteed_ speed. Note that | |
338cec32 | 120 | * the RAID driver will use the maximum available bandwidth if the IO |
1da177e4 LT |
121 | * subsystem is idle. There is also an 'absolute maximum' reconstruction |
122 | * speed limit - in case reconstruction slows down your system despite | |
123 | * idle IO detection. | |
124 | * | |
125 | * you can change it via /proc/sys/dev/raid/speed_limit_min and _max. | |
88202a0c | 126 | * or /sys/block/mdX/md/sync_speed_{min,max} |
1da177e4 LT |
127 | */ |
128 | ||
129 | static int sysctl_speed_limit_min = 1000; | |
130 | static int sysctl_speed_limit_max = 200000; | |
fd01b88c | 131 | static inline int speed_min(struct mddev *mddev) |
88202a0c N |
132 | { |
133 | return mddev->sync_speed_min ? | |
134 | mddev->sync_speed_min : sysctl_speed_limit_min; | |
135 | } | |
136 | ||
fd01b88c | 137 | static inline int speed_max(struct mddev *mddev) |
88202a0c N |
138 | { |
139 | return mddev->sync_speed_max ? | |
140 | mddev->sync_speed_max : sysctl_speed_limit_max; | |
141 | } | |
1da177e4 | 142 | |
69b00b5b GJ |
143 | static void rdev_uninit_serial(struct md_rdev *rdev) |
144 | { | |
145 | if (!test_and_clear_bit(CollisionCheck, &rdev->flags)) | |
146 | return; | |
147 | ||
025471f9 | 148 | kvfree(rdev->serial); |
69b00b5b GJ |
149 | rdev->serial = NULL; |
150 | } | |
151 | ||
152 | static void rdevs_uninit_serial(struct mddev *mddev) | |
153 | { | |
154 | struct md_rdev *rdev; | |
155 | ||
156 | rdev_for_each(rdev, mddev) | |
157 | rdev_uninit_serial(rdev); | |
158 | } | |
159 | ||
404659cf | 160 | static int rdev_init_serial(struct md_rdev *rdev) |
3e148a32 | 161 | { |
025471f9 GJ |
162 | /* serial_nums equals with BARRIER_BUCKETS_NR */ |
163 | int i, serial_nums = 1 << ((PAGE_SHIFT - ilog2(sizeof(atomic_t)))); | |
69b00b5b GJ |
164 | struct serial_in_rdev *serial = NULL; |
165 | ||
166 | if (test_bit(CollisionCheck, &rdev->flags)) | |
167 | return 0; | |
168 | ||
025471f9 GJ |
169 | serial = kvmalloc(sizeof(struct serial_in_rdev) * serial_nums, |
170 | GFP_KERNEL); | |
69b00b5b GJ |
171 | if (!serial) |
172 | return -ENOMEM; | |
173 | ||
025471f9 GJ |
174 | for (i = 0; i < serial_nums; i++) { |
175 | struct serial_in_rdev *serial_tmp = &serial[i]; | |
176 | ||
177 | spin_lock_init(&serial_tmp->serial_lock); | |
178 | serial_tmp->serial_rb = RB_ROOT_CACHED; | |
179 | init_waitqueue_head(&serial_tmp->serial_io_wait); | |
180 | } | |
181 | ||
69b00b5b | 182 | rdev->serial = serial; |
404659cf | 183 | set_bit(CollisionCheck, &rdev->flags); |
3e148a32 | 184 | |
69b00b5b | 185 | return 0; |
3e148a32 GJ |
186 | } |
187 | ||
69b00b5b | 188 | static int rdevs_init_serial(struct mddev *mddev) |
11d3a9f6 GJ |
189 | { |
190 | struct md_rdev *rdev; | |
69b00b5b | 191 | int ret = 0; |
11d3a9f6 GJ |
192 | |
193 | rdev_for_each(rdev, mddev) { | |
69b00b5b GJ |
194 | ret = rdev_init_serial(rdev); |
195 | if (ret) | |
196 | break; | |
11d3a9f6 | 197 | } |
69b00b5b GJ |
198 | |
199 | /* Free all resources if pool is not existed */ | |
200 | if (ret && !mddev->serial_info_pool) | |
201 | rdevs_uninit_serial(mddev); | |
202 | ||
203 | return ret; | |
11d3a9f6 GJ |
204 | } |
205 | ||
963c555e | 206 | /* |
de31ee94 GJ |
207 | * rdev needs to enable serial stuffs if it meets the conditions: |
208 | * 1. it is multi-queue device flaged with writemostly. | |
209 | * 2. the write-behind mode is enabled. | |
210 | */ | |
211 | static int rdev_need_serial(struct md_rdev *rdev) | |
212 | { | |
213 | return (rdev && rdev->mddev->bitmap_info.max_write_behind > 0 && | |
e556f6ba | 214 | rdev->bdev->bd_disk->queue->nr_hw_queues != 1 && |
de31ee94 GJ |
215 | test_bit(WriteMostly, &rdev->flags)); |
216 | } | |
217 | ||
218 | /* | |
219 | * Init resource for rdev(s), then create serial_info_pool if: | |
220 | * 1. rdev is the first device which return true from rdev_enable_serial. | |
221 | * 2. rdev is NULL, means we want to enable serialization for all rdevs. | |
963c555e | 222 | */ |
404659cf | 223 | void mddev_create_serial_pool(struct mddev *mddev, struct md_rdev *rdev, |
11d3a9f6 | 224 | bool is_suspend) |
963c555e | 225 | { |
69b00b5b GJ |
226 | int ret = 0; |
227 | ||
de31ee94 GJ |
228 | if (rdev && !rdev_need_serial(rdev) && |
229 | !test_bit(CollisionCheck, &rdev->flags)) | |
963c555e GJ |
230 | return; |
231 | ||
de31ee94 GJ |
232 | if (!is_suspend) |
233 | mddev_suspend(mddev); | |
234 | ||
235 | if (!rdev) | |
69b00b5b | 236 | ret = rdevs_init_serial(mddev); |
de31ee94 | 237 | else |
69b00b5b GJ |
238 | ret = rdev_init_serial(rdev); |
239 | if (ret) | |
240 | goto abort; | |
de31ee94 | 241 | |
404659cf | 242 | if (mddev->serial_info_pool == NULL) { |
3024ba2d CL |
243 | /* |
244 | * already in memalloc noio context by | |
245 | * mddev_suspend() | |
246 | */ | |
404659cf GJ |
247 | mddev->serial_info_pool = |
248 | mempool_create_kmalloc_pool(NR_SERIAL_INFOS, | |
249 | sizeof(struct serial_info)); | |
69b00b5b GJ |
250 | if (!mddev->serial_info_pool) { |
251 | rdevs_uninit_serial(mddev); | |
404659cf | 252 | pr_err("can't alloc memory pool for serialization\n"); |
69b00b5b | 253 | } |
963c555e | 254 | } |
69b00b5b GJ |
255 | |
256 | abort: | |
de31ee94 GJ |
257 | if (!is_suspend) |
258 | mddev_resume(mddev); | |
963c555e | 259 | } |
963c555e GJ |
260 | |
261 | /* | |
de31ee94 GJ |
262 | * Free resource from rdev(s), and destroy serial_info_pool under conditions: |
263 | * 1. rdev is the last device flaged with CollisionCheck. | |
264 | * 2. when bitmap is destroyed while policy is not enabled. | |
265 | * 3. for disable policy, the pool is destroyed only when no rdev needs it. | |
963c555e | 266 | */ |
69b00b5b GJ |
267 | void mddev_destroy_serial_pool(struct mddev *mddev, struct md_rdev *rdev, |
268 | bool is_suspend) | |
963c555e | 269 | { |
11d3a9f6 | 270 | if (rdev && !test_bit(CollisionCheck, &rdev->flags)) |
963c555e GJ |
271 | return; |
272 | ||
404659cf | 273 | if (mddev->serial_info_pool) { |
963c555e | 274 | struct md_rdev *temp; |
de31ee94 | 275 | int num = 0; /* used to track if other rdevs need the pool */ |
963c555e | 276 | |
11d3a9f6 GJ |
277 | if (!is_suspend) |
278 | mddev_suspend(mddev); | |
279 | rdev_for_each(temp, mddev) { | |
280 | if (!rdev) { | |
69b00b5b GJ |
281 | if (!mddev->serialize_policy || |
282 | !rdev_need_serial(temp)) | |
283 | rdev_uninit_serial(temp); | |
de31ee94 GJ |
284 | else |
285 | num++; | |
286 | } else if (temp != rdev && | |
287 | test_bit(CollisionCheck, &temp->flags)) | |
963c555e | 288 | num++; |
11d3a9f6 GJ |
289 | } |
290 | ||
291 | if (rdev) | |
69b00b5b | 292 | rdev_uninit_serial(rdev); |
de31ee94 GJ |
293 | |
294 | if (num) | |
295 | pr_info("The mempool could be used by other devices\n"); | |
296 | else { | |
404659cf GJ |
297 | mempool_destroy(mddev->serial_info_pool); |
298 | mddev->serial_info_pool = NULL; | |
963c555e | 299 | } |
11d3a9f6 GJ |
300 | if (!is_suspend) |
301 | mddev_resume(mddev); | |
963c555e GJ |
302 | } |
303 | } | |
304 | ||
1da177e4 LT |
305 | static struct ctl_table_header *raid_table_header; |
306 | ||
82592c38 | 307 | static struct ctl_table raid_table[] = { |
1da177e4 | 308 | { |
1da177e4 LT |
309 | .procname = "speed_limit_min", |
310 | .data = &sysctl_speed_limit_min, | |
311 | .maxlen = sizeof(int), | |
80ca3a44 | 312 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 313 | .proc_handler = proc_dointvec, |
1da177e4 LT |
314 | }, |
315 | { | |
1da177e4 LT |
316 | .procname = "speed_limit_max", |
317 | .data = &sysctl_speed_limit_max, | |
318 | .maxlen = sizeof(int), | |
80ca3a44 | 319 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 320 | .proc_handler = proc_dointvec, |
1da177e4 | 321 | }, |
894d2491 | 322 | { } |
1da177e4 LT |
323 | }; |
324 | ||
f91de92e N |
325 | static int start_readonly; |
326 | ||
78b6350d N |
327 | /* |
328 | * The original mechanism for creating an md device is to create | |
329 | * a device node in /dev and to open it. This causes races with device-close. | |
330 | * The preferred method is to write to the "new_array" module parameter. | |
331 | * This can avoid races. | |
332 | * Setting create_on_open to false disables the original mechanism | |
333 | * so all the races disappear. | |
334 | */ | |
335 | static bool create_on_open = true; | |
336 | ||
d7603b7e N |
337 | /* |
338 | * We have a system wide 'event count' that is incremented | |
339 | * on any 'interesting' event, and readers of /proc/mdstat | |
340 | * can use 'poll' or 'select' to find out when the event | |
341 | * count increases. | |
342 | * | |
343 | * Events are: | |
344 | * start array, stop array, error, add device, remove device, | |
345 | * start build, activate spare | |
346 | */ | |
2989ddbd | 347 | static DECLARE_WAIT_QUEUE_HEAD(md_event_waiters); |
d7603b7e | 348 | static atomic_t md_event_count; |
54679486 | 349 | void md_new_event(void) |
d7603b7e N |
350 | { |
351 | atomic_inc(&md_event_count); | |
352 | wake_up(&md_event_waiters); | |
353 | } | |
29269553 | 354 | EXPORT_SYMBOL_GPL(md_new_event); |
d7603b7e | 355 | |
1da177e4 LT |
356 | /* |
357 | * Enables to iterate over all existing md arrays | |
358 | * all_mddevs_lock protects this list. | |
359 | */ | |
360 | static LIST_HEAD(all_mddevs); | |
361 | static DEFINE_SPINLOCK(all_mddevs_lock); | |
362 | ||
d1932913 XN |
363 | static bool is_md_suspended(struct mddev *mddev) |
364 | { | |
72adae23 | 365 | return percpu_ref_is_dying(&mddev->active_io); |
d1932913 | 366 | } |
409c57f3 N |
367 | /* Rather than calling directly into the personality make_request function, |
368 | * IO requests come here first so that we can check if the device is | |
369 | * being suspended pending a reconfiguration. | |
370 | * We hold a refcount over the call to ->make_request. By the time that | |
371 | * call has finished, the bio has been linked into some internal structure | |
372 | * and so is visible to ->quiesce(), so we don't need the refcount any more. | |
373 | */ | |
b3143b9a N |
374 | static bool is_suspended(struct mddev *mddev, struct bio *bio) |
375 | { | |
d1932913 | 376 | if (is_md_suspended(mddev)) |
b3143b9a N |
377 | return true; |
378 | if (bio_data_dir(bio) != WRITE) | |
379 | return false; | |
380 | if (mddev->suspend_lo >= mddev->suspend_hi) | |
381 | return false; | |
382 | if (bio->bi_iter.bi_sector >= mddev->suspend_hi) | |
383 | return false; | |
384 | if (bio_end_sector(bio) < mddev->suspend_lo) | |
385 | return false; | |
386 | return true; | |
387 | } | |
388 | ||
393debc2 SL |
389 | void md_handle_request(struct mddev *mddev, struct bio *bio) |
390 | { | |
391 | check_suspended: | |
b3143b9a | 392 | if (is_suspended(mddev, bio)) { |
393debc2 | 393 | DEFINE_WAIT(__wait); |
f51d46d0 VV |
394 | /* Bail out if REQ_NOWAIT is set for the bio */ |
395 | if (bio->bi_opf & REQ_NOWAIT) { | |
f51d46d0 VV |
396 | bio_wouldblock_error(bio); |
397 | return; | |
398 | } | |
393debc2 SL |
399 | for (;;) { |
400 | prepare_to_wait(&mddev->sb_wait, &__wait, | |
401 | TASK_UNINTERRUPTIBLE); | |
b3143b9a | 402 | if (!is_suspended(mddev, bio)) |
393debc2 | 403 | break; |
393debc2 | 404 | schedule(); |
393debc2 SL |
405 | } |
406 | finish_wait(&mddev->sb_wait, &__wait); | |
407 | } | |
72adae23 XN |
408 | if (!percpu_ref_tryget_live(&mddev->active_io)) |
409 | goto check_suspended; | |
393debc2 SL |
410 | |
411 | if (!mddev->pers->make_request(mddev, bio)) { | |
72adae23 | 412 | percpu_ref_put(&mddev->active_io); |
393debc2 SL |
413 | goto check_suspended; |
414 | } | |
415 | ||
72adae23 | 416 | percpu_ref_put(&mddev->active_io); |
393debc2 SL |
417 | } |
418 | EXPORT_SYMBOL(md_handle_request); | |
419 | ||
3e08773c | 420 | static void md_submit_bio(struct bio *bio) |
1da177e4 | 421 | { |
49077326 | 422 | const int rw = bio_data_dir(bio); |
309dca30 | 423 | struct mddev *mddev = bio->bi_bdev->bd_disk->private_data; |
49077326 | 424 | |
9a5a8597 | 425 | if (mddev == NULL || mddev->pers == NULL) { |
62f7b198 | 426 | bio_io_error(bio); |
3e08773c | 427 | return; |
62f7b198 GP |
428 | } |
429 | ||
9a5a8597 | 430 | if (unlikely(test_bit(MD_BROKEN, &mddev->flags)) && (rw == WRITE)) { |
409c57f3 | 431 | bio_io_error(bio); |
3e08773c | 432 | return; |
409c57f3 | 433 | } |
9a5a8597 | 434 | |
5a97806f | 435 | bio = bio_split_to_limits(bio); |
613b1488 JA |
436 | if (!bio) |
437 | return; | |
9a5a8597 | 438 | |
f97a5528 | 439 | if (mddev->ro == MD_RDONLY && unlikely(rw == WRITE)) { |
4246a0b6 | 440 | if (bio_sectors(bio) != 0) |
4e4cbee9 | 441 | bio->bi_status = BLK_STS_IOERR; |
4246a0b6 | 442 | bio_endio(bio); |
3e08773c | 443 | return; |
bbfa57c0 | 444 | } |
49077326 | 445 | |
9c573de3 | 446 | /* bio could be mergeable after passing to underlayer */ |
1eff9d32 | 447 | bio->bi_opf &= ~REQ_NOMERGE; |
393debc2 SL |
448 | |
449 | md_handle_request(mddev, bio); | |
409c57f3 N |
450 | } |
451 | ||
9e35b99c N |
452 | /* mddev_suspend makes sure no new requests are submitted |
453 | * to the device, and that any requests that have been submitted | |
454 | * are completely handled. | |
afa0f557 N |
455 | * Once mddev_detach() is called and completes, the module will be |
456 | * completely unused. | |
9e35b99c | 457 | */ |
fd01b88c | 458 | void mddev_suspend(struct mddev *mddev) |
409c57f3 | 459 | { |
092398dc | 460 | WARN_ON_ONCE(mddev->thread && current == mddev->thread->tsk); |
4d5324f7 | 461 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
462 | if (mddev->suspended++) |
463 | return; | |
cc27b0c7 | 464 | wake_up(&mddev->sb_wait); |
35bfc521 | 465 | set_bit(MD_ALLOW_SB_UPDATE, &mddev->flags); |
72adae23 XN |
466 | percpu_ref_kill(&mddev->active_io); |
467 | wait_event(mddev->sb_wait, percpu_ref_is_zero(&mddev->active_io)); | |
409c57f3 | 468 | mddev->pers->quiesce(mddev, 1); |
35bfc521 N |
469 | clear_bit_unlock(MD_ALLOW_SB_UPDATE, &mddev->flags); |
470 | wait_event(mddev->sb_wait, !test_bit(MD_UPDATING_SB, &mddev->flags)); | |
0d9f4f13 JB |
471 | |
472 | del_timer_sync(&mddev->safemode_timer); | |
78f57ef9 CL |
473 | /* restrict memory reclaim I/O during raid array is suspend */ |
474 | mddev->noio_flag = memalloc_noio_save(); | |
409c57f3 | 475 | } |
390ee602 | 476 | EXPORT_SYMBOL_GPL(mddev_suspend); |
409c57f3 | 477 | |
fd01b88c | 478 | void mddev_resume(struct mddev *mddev) |
409c57f3 | 479 | { |
78f57ef9 CL |
480 | /* entred the memalloc scope from mddev_suspend() */ |
481 | memalloc_noio_restore(mddev->noio_flag); | |
4d5324f7 | 482 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
483 | if (--mddev->suspended) |
484 | return; | |
72adae23 | 485 | percpu_ref_resurrect(&mddev->active_io); |
409c57f3 N |
486 | wake_up(&mddev->sb_wait); |
487 | mddev->pers->quiesce(mddev, 0); | |
0fd018af | 488 | |
47525e59 | 489 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
0fd018af JB |
490 | md_wakeup_thread(mddev->thread); |
491 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
1da177e4 | 492 | } |
390ee602 | 493 | EXPORT_SYMBOL_GPL(mddev_resume); |
1da177e4 | 494 | |
a2826aa9 | 495 | /* |
e9c7469b | 496 | * Generic flush handling for md |
a2826aa9 N |
497 | */ |
498 | ||
4bc034d3 | 499 | static void md_end_flush(struct bio *bio) |
a2826aa9 | 500 | { |
4bc034d3 N |
501 | struct md_rdev *rdev = bio->bi_private; |
502 | struct mddev *mddev = rdev->mddev; | |
a2826aa9 | 503 | |
341097ee MP |
504 | bio_put(bio); |
505 | ||
a2826aa9 N |
506 | rdev_dec_pending(rdev, mddev); |
507 | ||
4bc034d3 N |
508 | if (atomic_dec_and_test(&mddev->flush_pending)) { |
509 | /* The pre-request flush has finished */ | |
510 | queue_work(md_wq, &mddev->flush_work); | |
a2826aa9 | 511 | } |
5a409b4f | 512 | } |
a7a07e69 | 513 | |
4bc034d3 N |
514 | static void md_submit_flush_data(struct work_struct *ws); |
515 | ||
516 | static void submit_flushes(struct work_struct *ws) | |
a2826aa9 | 517 | { |
4bc034d3 | 518 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); |
3cb03002 | 519 | struct md_rdev *rdev; |
a2826aa9 | 520 | |
2bc13b83 | 521 | mddev->start_flush = ktime_get_boottime(); |
4bc034d3 N |
522 | INIT_WORK(&mddev->flush_work, md_submit_flush_data); |
523 | atomic_set(&mddev->flush_pending, 1); | |
a2826aa9 | 524 | rcu_read_lock(); |
dafb20fa | 525 | rdev_for_each_rcu(rdev, mddev) |
a2826aa9 N |
526 | if (rdev->raid_disk >= 0 && |
527 | !test_bit(Faulty, &rdev->flags)) { | |
528 | /* Take two references, one is dropped | |
529 | * when request finishes, one after | |
530 | * we reclaim rcu_read_lock | |
531 | */ | |
532 | struct bio *bi; | |
533 | atomic_inc(&rdev->nr_pending); | |
534 | atomic_inc(&rdev->nr_pending); | |
535 | rcu_read_unlock(); | |
609be106 CH |
536 | bi = bio_alloc_bioset(rdev->bdev, 0, |
537 | REQ_OP_WRITE | REQ_PREFLUSH, | |
538 | GFP_NOIO, &mddev->bio_set); | |
5a409b4f | 539 | bi->bi_end_io = md_end_flush; |
4bc034d3 | 540 | bi->bi_private = rdev; |
4bc034d3 | 541 | atomic_inc(&mddev->flush_pending); |
4e49ea4a | 542 | submit_bio(bi); |
a2826aa9 N |
543 | rcu_read_lock(); |
544 | rdev_dec_pending(rdev, mddev); | |
545 | } | |
546 | rcu_read_unlock(); | |
4bc034d3 N |
547 | if (atomic_dec_and_test(&mddev->flush_pending)) |
548 | queue_work(md_wq, &mddev->flush_work); | |
549 | } | |
a2826aa9 | 550 | |
4bc034d3 N |
551 | static void md_submit_flush_data(struct work_struct *ws) |
552 | { | |
553 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); | |
554 | struct bio *bio = mddev->flush_bio; | |
555 | ||
556 | /* | |
557 | * must reset flush_bio before calling into md_handle_request to avoid a | |
558 | * deadlock, because other bios passed md_handle_request suspend check | |
559 | * could wait for this and below md_handle_request could wait for those | |
560 | * bios because of suspend check | |
561 | */ | |
dc5d17a3 | 562 | spin_lock_irq(&mddev->lock); |
81ba3c24 | 563 | mddev->prev_flush_start = mddev->start_flush; |
4bc034d3 | 564 | mddev->flush_bio = NULL; |
dc5d17a3 | 565 | spin_unlock_irq(&mddev->lock); |
4bc034d3 N |
566 | wake_up(&mddev->sb_wait); |
567 | ||
568 | if (bio->bi_iter.bi_size == 0) { | |
569 | /* an empty barrier - all done */ | |
570 | bio_endio(bio); | |
571 | } else { | |
572 | bio->bi_opf &= ~REQ_PREFLUSH; | |
573 | md_handle_request(mddev, bio); | |
a2826aa9 | 574 | } |
a2826aa9 | 575 | } |
4bc034d3 | 576 | |
775d7831 DJ |
577 | /* |
578 | * Manages consolidation of flushes and submitting any flushes needed for | |
579 | * a bio with REQ_PREFLUSH. Returns true if the bio is finished or is | |
580 | * being finished in another context. Returns false if the flushing is | |
581 | * complete but still needs the I/O portion of the bio to be processed. | |
582 | */ | |
583 | bool md_flush_request(struct mddev *mddev, struct bio *bio) | |
4bc034d3 | 584 | { |
81ba3c24 | 585 | ktime_t req_start = ktime_get_boottime(); |
4bc034d3 | 586 | spin_lock_irq(&mddev->lock); |
204d1a64 PG |
587 | /* flush requests wait until ongoing flush completes, |
588 | * hence coalescing all the pending requests. | |
589 | */ | |
4bc034d3 | 590 | wait_event_lock_irq(mddev->sb_wait, |
2bc13b83 | 591 | !mddev->flush_bio || |
a23f2aae | 592 | ktime_before(req_start, mddev->prev_flush_start), |
4bc034d3 | 593 | mddev->lock); |
204d1a64 | 594 | /* new request after previous flush is completed */ |
a23f2aae | 595 | if (ktime_after(req_start, mddev->prev_flush_start)) { |
2bc13b83 N |
596 | WARN_ON(mddev->flush_bio); |
597 | mddev->flush_bio = bio; | |
598 | bio = NULL; | |
599 | } | |
4bc034d3 N |
600 | spin_unlock_irq(&mddev->lock); |
601 | ||
2bc13b83 N |
602 | if (!bio) { |
603 | INIT_WORK(&mddev->flush_work, submit_flushes); | |
604 | queue_work(md_wq, &mddev->flush_work); | |
605 | } else { | |
606 | /* flush was performed for some other bio while we waited. */ | |
607 | if (bio->bi_iter.bi_size == 0) | |
608 | /* an empty barrier - all done */ | |
609 | bio_endio(bio); | |
610 | else { | |
611 | bio->bi_opf &= ~REQ_PREFLUSH; | |
775d7831 | 612 | return false; |
2bc13b83 N |
613 | } |
614 | } | |
775d7831 | 615 | return true; |
4bc034d3 | 616 | } |
e9c7469b | 617 | EXPORT_SYMBOL(md_flush_request); |
409c57f3 | 618 | |
fd01b88c | 619 | static inline struct mddev *mddev_get(struct mddev *mddev) |
1da177e4 | 620 | { |
12a6caf2 CH |
621 | lockdep_assert_held(&all_mddevs_lock); |
622 | ||
623 | if (test_bit(MD_DELETED, &mddev->flags)) | |
624 | return NULL; | |
1da177e4 LT |
625 | atomic_inc(&mddev->active); |
626 | return mddev; | |
627 | } | |
628 | ||
5fd3a17e | 629 | static void mddev_delayed_delete(struct work_struct *ws); |
d3374825 | 630 | |
34cb92c0 | 631 | void mddev_put(struct mddev *mddev) |
1da177e4 LT |
632 | { |
633 | if (!atomic_dec_and_lock(&mddev->active, &all_mddevs_lock)) | |
634 | return; | |
d3374825 | 635 | if (!mddev->raid_disks && list_empty(&mddev->disks) && |
cbd19983 N |
636 | mddev->ctime == 0 && !mddev->hold_active) { |
637 | /* Array is not configured at all, and not held active, | |
638 | * so destroy it */ | |
12a6caf2 | 639 | set_bit(MD_DELETED, &mddev->flags); |
28dec870 KO |
640 | |
641 | /* | |
642 | * Call queue_work inside the spinlock so that | |
643 | * flush_workqueue() after mddev_find will succeed in waiting | |
644 | * for the work to be done. | |
645 | */ | |
646 | INIT_WORK(&mddev->del_work, mddev_delayed_delete); | |
647 | queue_work(md_misc_wq, &mddev->del_work); | |
d3374825 N |
648 | } |
649 | spin_unlock(&all_mddevs_lock); | |
1da177e4 LT |
650 | } |
651 | ||
8376d3c1 | 652 | static void md_safemode_timeout(struct timer_list *t); |
25b2edfa | 653 | |
fd01b88c | 654 | void mddev_init(struct mddev *mddev) |
fafd7fb0 N |
655 | { |
656 | mutex_init(&mddev->open_mutex); | |
657 | mutex_init(&mddev->reconfig_mutex); | |
658 | mutex_init(&mddev->bitmap_info.mutex); | |
659 | INIT_LIST_HEAD(&mddev->disks); | |
660 | INIT_LIST_HEAD(&mddev->all_mddevs); | |
8376d3c1 | 661 | timer_setup(&mddev->safemode_timer, md_safemode_timeout, 0); |
fafd7fb0 N |
662 | atomic_set(&mddev->active, 1); |
663 | atomic_set(&mddev->openers, 0); | |
85572d7c | 664 | spin_lock_init(&mddev->lock); |
4bc034d3 | 665 | atomic_set(&mddev->flush_pending, 0); |
fafd7fb0 N |
666 | init_waitqueue_head(&mddev->sb_wait); |
667 | init_waitqueue_head(&mddev->recovery_wait); | |
668 | mddev->reshape_position = MaxSector; | |
2c810cdd | 669 | mddev->reshape_backwards = 0; |
c4a39551 | 670 | mddev->last_sync_action = "none"; |
fafd7fb0 N |
671 | mddev->resync_min = 0; |
672 | mddev->resync_max = MaxSector; | |
673 | mddev->level = LEVEL_NONE; | |
674 | } | |
390ee602 | 675 | EXPORT_SYMBOL_GPL(mddev_init); |
fafd7fb0 | 676 | |
8b57251f CH |
677 | static struct mddev *mddev_find_locked(dev_t unit) |
678 | { | |
679 | struct mddev *mddev; | |
680 | ||
681 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
682 | if (mddev->unit == unit) | |
683 | return mddev; | |
684 | ||
685 | return NULL; | |
686 | } | |
687 | ||
85c8c3c1 CH |
688 | /* find an unused unit number */ |
689 | static dev_t mddev_alloc_unit(void) | |
690 | { | |
691 | static int next_minor = 512; | |
692 | int start = next_minor; | |
693 | bool is_free = 0; | |
694 | dev_t dev = 0; | |
695 | ||
696 | while (!is_free) { | |
697 | dev = MKDEV(MD_MAJOR, next_minor); | |
698 | next_minor++; | |
699 | if (next_minor > MINORMASK) | |
700 | next_minor = 0; | |
701 | if (next_minor == start) | |
702 | return 0; /* Oh dear, all in use. */ | |
703 | is_free = !mddev_find_locked(dev); | |
704 | } | |
705 | ||
706 | return dev; | |
707 | } | |
708 | ||
0d809b38 | 709 | static struct mddev *mddev_alloc(dev_t unit) |
1da177e4 | 710 | { |
0d809b38 CH |
711 | struct mddev *new; |
712 | int error; | |
1da177e4 | 713 | |
8f5f02c4 | 714 | if (unit && MAJOR(unit) != MD_MAJOR) |
d144fe6f | 715 | unit &= ~((1 << MdpMinorShift) - 1); |
8f5f02c4 | 716 | |
d144fe6f CH |
717 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
718 | if (!new) | |
0d809b38 | 719 | return ERR_PTR(-ENOMEM); |
d144fe6f | 720 | mddev_init(new); |
efeb53c0 | 721 | |
d144fe6f | 722 | spin_lock(&all_mddevs_lock); |
efeb53c0 | 723 | if (unit) { |
0d809b38 CH |
724 | error = -EEXIST; |
725 | if (mddev_find_locked(unit)) | |
d144fe6f | 726 | goto out_free_new; |
d144fe6f CH |
727 | new->unit = unit; |
728 | if (MAJOR(unit) == MD_MAJOR) | |
729 | new->md_minor = MINOR(unit); | |
730 | else | |
731 | new->md_minor = MINOR(unit) >> MdpMinorShift; | |
732 | new->hold_active = UNTIL_IOCTL; | |
733 | } else { | |
0d809b38 | 734 | error = -ENODEV; |
85c8c3c1 | 735 | new->unit = mddev_alloc_unit(); |
d144fe6f CH |
736 | if (!new->unit) |
737 | goto out_free_new; | |
85c8c3c1 | 738 | new->md_minor = MINOR(new->unit); |
efeb53c0 | 739 | new->hold_active = UNTIL_STOP; |
1da177e4 | 740 | } |
1da177e4 | 741 | |
d144fe6f CH |
742 | list_add(&new->all_mddevs, &all_mddevs); |
743 | spin_unlock(&all_mddevs_lock); | |
744 | return new; | |
745 | out_free_new: | |
746 | spin_unlock(&all_mddevs_lock); | |
747 | kfree(new); | |
0d809b38 | 748 | return ERR_PTR(error); |
1da177e4 LT |
749 | } |
750 | ||
c57094a6 CH |
751 | static void mddev_free(struct mddev *mddev) |
752 | { | |
753 | spin_lock(&all_mddevs_lock); | |
754 | list_del(&mddev->all_mddevs); | |
755 | spin_unlock(&all_mddevs_lock); | |
756 | ||
757 | kfree(mddev); | |
758 | } | |
759 | ||
c32dc040 | 760 | static const struct attribute_group md_redundancy_group; |
b6eb127d | 761 | |
5c47daf6 | 762 | void mddev_unlock(struct mddev *mddev) |
1da177e4 | 763 | { |
a64c876f | 764 | if (mddev->to_remove) { |
b6eb127d N |
765 | /* These cannot be removed under reconfig_mutex as |
766 | * an access to the files will try to take reconfig_mutex | |
767 | * while holding the file unremovable, which leads to | |
768 | * a deadlock. | |
bb4f1e9d N |
769 | * So hold set sysfs_active while the remove in happeing, |
770 | * and anything else which might set ->to_remove or my | |
771 | * otherwise change the sysfs namespace will fail with | |
772 | * -EBUSY if sysfs_active is still set. | |
773 | * We set sysfs_active under reconfig_mutex and elsewhere | |
774 | * test it under the same mutex to ensure its correct value | |
775 | * is seen. | |
b6eb127d | 776 | */ |
c32dc040 | 777 | const struct attribute_group *to_remove = mddev->to_remove; |
a64c876f | 778 | mddev->to_remove = NULL; |
bb4f1e9d | 779 | mddev->sysfs_active = 1; |
b6eb127d N |
780 | mutex_unlock(&mddev->reconfig_mutex); |
781 | ||
00bcb4ac N |
782 | if (mddev->kobj.sd) { |
783 | if (to_remove != &md_redundancy_group) | |
784 | sysfs_remove_group(&mddev->kobj, to_remove); | |
785 | if (mddev->pers == NULL || | |
786 | mddev->pers->sync_request == NULL) { | |
787 | sysfs_remove_group(&mddev->kobj, &md_redundancy_group); | |
788 | if (mddev->sysfs_action) | |
789 | sysfs_put(mddev->sysfs_action); | |
e8efa9b8 JB |
790 | if (mddev->sysfs_completed) |
791 | sysfs_put(mddev->sysfs_completed); | |
792 | if (mddev->sysfs_degraded) | |
793 | sysfs_put(mddev->sysfs_degraded); | |
00bcb4ac | 794 | mddev->sysfs_action = NULL; |
e8efa9b8 JB |
795 | mddev->sysfs_completed = NULL; |
796 | mddev->sysfs_degraded = NULL; | |
00bcb4ac | 797 | } |
a64c876f | 798 | } |
bb4f1e9d | 799 | mddev->sysfs_active = 0; |
b6eb127d N |
800 | } else |
801 | mutex_unlock(&mddev->reconfig_mutex); | |
1da177e4 | 802 | |
751e67ca CD |
803 | /* As we've dropped the mutex we need a spinlock to |
804 | * make sure the thread doesn't disappear | |
01f96c0a N |
805 | */ |
806 | spin_lock(&pers_lock); | |
005eca5e | 807 | md_wakeup_thread(mddev->thread); |
4d5324f7 | 808 | wake_up(&mddev->sb_wait); |
01f96c0a | 809 | spin_unlock(&pers_lock); |
1da177e4 | 810 | } |
5c47daf6 | 811 | EXPORT_SYMBOL_GPL(mddev_unlock); |
1da177e4 | 812 | |
57d051dc | 813 | struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr) |
1ca69c4b N |
814 | { |
815 | struct md_rdev *rdev; | |
816 | ||
817 | rdev_for_each_rcu(rdev, mddev) | |
818 | if (rdev->desc_nr == nr) | |
819 | return rdev; | |
820 | ||
821 | return NULL; | |
822 | } | |
57d051dc | 823 | EXPORT_SYMBOL_GPL(md_find_rdev_nr_rcu); |
1ca69c4b N |
824 | |
825 | static struct md_rdev *find_rdev(struct mddev *mddev, dev_t dev) | |
1da177e4 | 826 | { |
3cb03002 | 827 | struct md_rdev *rdev; |
1da177e4 | 828 | |
dafb20fa | 829 | rdev_for_each(rdev, mddev) |
1da177e4 LT |
830 | if (rdev->bdev->bd_dev == dev) |
831 | return rdev; | |
159ec1fc | 832 | |
1da177e4 LT |
833 | return NULL; |
834 | } | |
835 | ||
1532d9e8 | 836 | struct md_rdev *md_find_rdev_rcu(struct mddev *mddev, dev_t dev) |
1ca69c4b N |
837 | { |
838 | struct md_rdev *rdev; | |
839 | ||
840 | rdev_for_each_rcu(rdev, mddev) | |
841 | if (rdev->bdev->bd_dev == dev) | |
842 | return rdev; | |
843 | ||
844 | return NULL; | |
845 | } | |
1532d9e8 | 846 | EXPORT_SYMBOL_GPL(md_find_rdev_rcu); |
1ca69c4b | 847 | |
84fc4b56 | 848 | static struct md_personality *find_pers(int level, char *clevel) |
2604b703 | 849 | { |
84fc4b56 | 850 | struct md_personality *pers; |
d9d166c2 N |
851 | list_for_each_entry(pers, &pers_list, list) { |
852 | if (level != LEVEL_NONE && pers->level == level) | |
2604b703 | 853 | return pers; |
d9d166c2 N |
854 | if (strcmp(pers->name, clevel)==0) |
855 | return pers; | |
856 | } | |
2604b703 N |
857 | return NULL; |
858 | } | |
859 | ||
b73df2d3 | 860 | /* return the offset of the super block in 512byte sectors */ |
3cb03002 | 861 | static inline sector_t calc_dev_sboffset(struct md_rdev *rdev) |
1da177e4 | 862 | { |
0fe80347 | 863 | return MD_NEW_SIZE_SECTORS(bdev_nr_sectors(rdev->bdev)); |
1da177e4 LT |
864 | } |
865 | ||
f72ffdd6 | 866 | static int alloc_disk_sb(struct md_rdev *rdev) |
1da177e4 | 867 | { |
1da177e4 | 868 | rdev->sb_page = alloc_page(GFP_KERNEL); |
7f0f0d87 | 869 | if (!rdev->sb_page) |
ebc24337 | 870 | return -ENOMEM; |
1da177e4 LT |
871 | return 0; |
872 | } | |
873 | ||
545c8795 | 874 | void md_rdev_clear(struct md_rdev *rdev) |
1da177e4 LT |
875 | { |
876 | if (rdev->sb_page) { | |
2d1f3b5d | 877 | put_page(rdev->sb_page); |
1da177e4 LT |
878 | rdev->sb_loaded = 0; |
879 | rdev->sb_page = NULL; | |
0f420358 | 880 | rdev->sb_start = 0; |
dd8ac336 | 881 | rdev->sectors = 0; |
1da177e4 | 882 | } |
2699b672 N |
883 | if (rdev->bb_page) { |
884 | put_page(rdev->bb_page); | |
885 | rdev->bb_page = NULL; | |
886 | } | |
d3b407fb | 887 | badblocks_exit(&rdev->badblocks); |
1da177e4 | 888 | } |
545c8795 | 889 | EXPORT_SYMBOL_GPL(md_rdev_clear); |
1da177e4 | 890 | |
4246a0b6 | 891 | static void super_written(struct bio *bio) |
7bfa19f2 | 892 | { |
3cb03002 | 893 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 894 | struct mddev *mddev = rdev->mddev; |
7bfa19f2 | 895 | |
4e4cbee9 | 896 | if (bio->bi_status) { |
b3db8a21 GJ |
897 | pr_err("md: %s gets error=%d\n", __func__, |
898 | blk_status_to_errno(bio->bi_status)); | |
a9701a30 | 899 | md_error(mddev, rdev); |
46533ff7 N |
900 | if (!test_bit(Faulty, &rdev->flags) |
901 | && (bio->bi_opf & MD_FAILFAST)) { | |
2953079c | 902 | set_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags); |
46533ff7 N |
903 | set_bit(LastDev, &rdev->flags); |
904 | } | |
905 | } else | |
906 | clear_bit(LastDev, &rdev->flags); | |
7bfa19f2 | 907 | |
341097ee MP |
908 | bio_put(bio); |
909 | ||
910 | rdev_dec_pending(rdev, mddev); | |
911 | ||
a9701a30 N |
912 | if (atomic_dec_and_test(&mddev->pending_writes)) |
913 | wake_up(&mddev->sb_wait); | |
7bfa19f2 N |
914 | } |
915 | ||
fd01b88c | 916 | void md_super_write(struct mddev *mddev, struct md_rdev *rdev, |
7bfa19f2 N |
917 | sector_t sector, int size, struct page *page) |
918 | { | |
919 | /* write first size bytes of page to sector of rdev | |
920 | * Increment mddev->pending_writes before returning | |
921 | * and decrement it on completion, waking up sb_wait | |
922 | * if zero is reached. | |
923 | * If an error occurred, call md_error | |
924 | */ | |
46533ff7 | 925 | struct bio *bio; |
46533ff7 | 926 | |
4b6c1060 HM |
927 | if (!page) |
928 | return; | |
929 | ||
46533ff7 N |
930 | if (test_bit(Faulty, &rdev->flags)) |
931 | return; | |
932 | ||
609be106 CH |
933 | bio = bio_alloc_bioset(rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev, |
934 | 1, | |
935 | REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH | REQ_FUA, | |
936 | GFP_NOIO, &mddev->sync_set); | |
7bfa19f2 | 937 | |
ed3b98c7 SL |
938 | atomic_inc(&rdev->nr_pending); |
939 | ||
4f024f37 | 940 | bio->bi_iter.bi_sector = sector; |
7bfa19f2 N |
941 | bio_add_page(bio, page, size, 0); |
942 | bio->bi_private = rdev; | |
943 | bio->bi_end_io = super_written; | |
46533ff7 N |
944 | |
945 | if (test_bit(MD_FAILFAST_SUPPORTED, &mddev->flags) && | |
946 | test_bit(FailFast, &rdev->flags) && | |
947 | !test_bit(LastDev, &rdev->flags)) | |
609be106 | 948 | bio->bi_opf |= MD_FAILFAST; |
a9701a30 | 949 | |
7bfa19f2 | 950 | atomic_inc(&mddev->pending_writes); |
4e49ea4a | 951 | submit_bio(bio); |
a9701a30 N |
952 | } |
953 | ||
46533ff7 | 954 | int md_super_wait(struct mddev *mddev) |
a9701a30 | 955 | { |
e9c7469b | 956 | /* wait for all superblock writes that were scheduled to complete */ |
1967cd56 | 957 | wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0); |
2953079c | 958 | if (test_and_clear_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags)) |
46533ff7 N |
959 | return -EAGAIN; |
960 | return 0; | |
7bfa19f2 N |
961 | } |
962 | ||
3cb03002 | 963 | int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, |
4ce4c73f | 964 | struct page *page, blk_opf_t opf, bool metadata_op) |
1da177e4 | 965 | { |
32637385 CH |
966 | struct bio bio; |
967 | struct bio_vec bvec; | |
968 | ||
74d46992 | 969 | if (metadata_op && rdev->meta_bdev) |
4ce4c73f | 970 | bio_init(&bio, rdev->meta_bdev, &bvec, 1, opf); |
74d46992 | 971 | else |
4ce4c73f | 972 | bio_init(&bio, rdev->bdev, &bvec, 1, opf); |
49add496 | 973 | |
ccebd4c4 | 974 | if (metadata_op) |
32637385 | 975 | bio.bi_iter.bi_sector = sector + rdev->sb_start; |
1fdd6fc9 N |
976 | else if (rdev->mddev->reshape_position != MaxSector && |
977 | (rdev->mddev->reshape_backwards == | |
978 | (sector >= rdev->mddev->reshape_position))) | |
32637385 | 979 | bio.bi_iter.bi_sector = sector + rdev->new_data_offset; |
ccebd4c4 | 980 | else |
32637385 CH |
981 | bio.bi_iter.bi_sector = sector + rdev->data_offset; |
982 | bio_add_page(&bio, page, size, 0); | |
4e49ea4a | 983 | |
32637385 | 984 | submit_bio_wait(&bio); |
1da177e4 | 985 | |
32637385 | 986 | return !bio.bi_status; |
1da177e4 | 987 | } |
a8745db2 | 988 | EXPORT_SYMBOL_GPL(sync_page_io); |
1da177e4 | 989 | |
f72ffdd6 | 990 | static int read_disk_sb(struct md_rdev *rdev, int size) |
1da177e4 | 991 | { |
1da177e4 LT |
992 | if (rdev->sb_loaded) |
993 | return 0; | |
994 | ||
4ce4c73f | 995 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, REQ_OP_READ, true)) |
1da177e4 LT |
996 | goto fail; |
997 | rdev->sb_loaded = 1; | |
998 | return 0; | |
999 | ||
1000 | fail: | |
913cce5a CH |
1001 | pr_err("md: disabled device %pg, could not read superblock.\n", |
1002 | rdev->bdev); | |
1da177e4 LT |
1003 | return -EINVAL; |
1004 | } | |
1005 | ||
e6fd2093 | 1006 | static int md_uuid_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 | 1007 | { |
f72ffdd6 | 1008 | return sb1->set_uuid0 == sb2->set_uuid0 && |
05710466 AN |
1009 | sb1->set_uuid1 == sb2->set_uuid1 && |
1010 | sb1->set_uuid2 == sb2->set_uuid2 && | |
1011 | sb1->set_uuid3 == sb2->set_uuid3; | |
1da177e4 LT |
1012 | } |
1013 | ||
e6fd2093 | 1014 | static int md_sb_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 LT |
1015 | { |
1016 | int ret; | |
1017 | mdp_super_t *tmp1, *tmp2; | |
1018 | ||
1019 | tmp1 = kmalloc(sizeof(*tmp1),GFP_KERNEL); | |
1020 | tmp2 = kmalloc(sizeof(*tmp2),GFP_KERNEL); | |
1021 | ||
1022 | if (!tmp1 || !tmp2) { | |
1023 | ret = 0; | |
1da177e4 LT |
1024 | goto abort; |
1025 | } | |
1026 | ||
1027 | *tmp1 = *sb1; | |
1028 | *tmp2 = *sb2; | |
1029 | ||
1030 | /* | |
1031 | * nr_disks is not constant | |
1032 | */ | |
1033 | tmp1->nr_disks = 0; | |
1034 | tmp2->nr_disks = 0; | |
1035 | ||
ce0c8e05 | 1036 | ret = (memcmp(tmp1, tmp2, MD_SB_GENERIC_CONSTANT_WORDS * 4) == 0); |
1da177e4 | 1037 | abort: |
990a8baf JJ |
1038 | kfree(tmp1); |
1039 | kfree(tmp2); | |
1da177e4 LT |
1040 | return ret; |
1041 | } | |
1042 | ||
4d167f09 N |
1043 | static u32 md_csum_fold(u32 csum) |
1044 | { | |
1045 | csum = (csum & 0xffff) + (csum >> 16); | |
1046 | return (csum & 0xffff) + (csum >> 16); | |
1047 | } | |
1048 | ||
f72ffdd6 | 1049 | static unsigned int calc_sb_csum(mdp_super_t *sb) |
1da177e4 | 1050 | { |
4d167f09 N |
1051 | u64 newcsum = 0; |
1052 | u32 *sb32 = (u32*)sb; | |
1053 | int i; | |
1da177e4 LT |
1054 | unsigned int disk_csum, csum; |
1055 | ||
1056 | disk_csum = sb->sb_csum; | |
1057 | sb->sb_csum = 0; | |
4d167f09 N |
1058 | |
1059 | for (i = 0; i < MD_SB_BYTES/4 ; i++) | |
1060 | newcsum += sb32[i]; | |
1061 | csum = (newcsum & 0xffffffff) + (newcsum>>32); | |
1062 | ||
4d167f09 N |
1063 | #ifdef CONFIG_ALPHA |
1064 | /* This used to use csum_partial, which was wrong for several | |
1065 | * reasons including that different results are returned on | |
1066 | * different architectures. It isn't critical that we get exactly | |
1067 | * the same return value as before (we always csum_fold before | |
1068 | * testing, and that removes any differences). However as we | |
1069 | * know that csum_partial always returned a 16bit value on | |
1070 | * alphas, do a fold to maximise conformity to previous behaviour. | |
1071 | */ | |
1072 | sb->sb_csum = md_csum_fold(disk_csum); | |
1073 | #else | |
1da177e4 | 1074 | sb->sb_csum = disk_csum; |
4d167f09 | 1075 | #endif |
1da177e4 LT |
1076 | return csum; |
1077 | } | |
1078 | ||
1da177e4 LT |
1079 | /* |
1080 | * Handle superblock details. | |
1081 | * We want to be able to handle multiple superblock formats | |
1082 | * so we have a common interface to them all, and an array of | |
1083 | * different handlers. | |
1084 | * We rely on user-space to write the initial superblock, and support | |
1085 | * reading and updating of superblocks. | |
1086 | * Interface methods are: | |
3cb03002 | 1087 | * int load_super(struct md_rdev *dev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1088 | * loads and validates a superblock on dev. |
1089 | * if refdev != NULL, compare superblocks on both devices | |
1090 | * Return: | |
1091 | * 0 - dev has a superblock that is compatible with refdev | |
1092 | * 1 - dev has a superblock that is compatible and newer than refdev | |
1093 | * so dev should be used as the refdev in future | |
1094 | * -EINVAL superblock incompatible or invalid | |
1095 | * -othererror e.g. -EIO | |
1096 | * | |
fd01b88c | 1097 | * int validate_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1098 | * Verify that dev is acceptable into mddev. |
1099 | * The first time, mddev->raid_disks will be 0, and data from | |
1100 | * dev should be merged in. Subsequent calls check that dev | |
1101 | * is new enough. Return 0 or -EINVAL | |
1102 | * | |
fd01b88c | 1103 | * void sync_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1104 | * Update the superblock for rdev with data in mddev |
1105 | * This does not write to disc. | |
1106 | * | |
1107 | */ | |
1108 | ||
1109 | struct super_type { | |
0cd17fec CW |
1110 | char *name; |
1111 | struct module *owner; | |
c6563a8c N |
1112 | int (*load_super)(struct md_rdev *rdev, |
1113 | struct md_rdev *refdev, | |
0cd17fec | 1114 | int minor_version); |
c6563a8c N |
1115 | int (*validate_super)(struct mddev *mddev, |
1116 | struct md_rdev *rdev); | |
1117 | void (*sync_super)(struct mddev *mddev, | |
1118 | struct md_rdev *rdev); | |
3cb03002 | 1119 | unsigned long long (*rdev_size_change)(struct md_rdev *rdev, |
15f4a5fd | 1120 | sector_t num_sectors); |
c6563a8c N |
1121 | int (*allow_new_offset)(struct md_rdev *rdev, |
1122 | unsigned long long new_offset); | |
1da177e4 LT |
1123 | }; |
1124 | ||
0894cc30 AN |
1125 | /* |
1126 | * Check that the given mddev has no bitmap. | |
1127 | * | |
1128 | * This function is called from the run method of all personalities that do not | |
1129 | * support bitmaps. It prints an error message and returns non-zero if mddev | |
1130 | * has a bitmap. Otherwise, it returns 0. | |
1131 | * | |
1132 | */ | |
fd01b88c | 1133 | int md_check_no_bitmap(struct mddev *mddev) |
0894cc30 | 1134 | { |
c3d9714e | 1135 | if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset) |
0894cc30 | 1136 | return 0; |
9d48739e | 1137 | pr_warn("%s: bitmaps are not supported for %s\n", |
0894cc30 AN |
1138 | mdname(mddev), mddev->pers->name); |
1139 | return 1; | |
1140 | } | |
1141 | EXPORT_SYMBOL(md_check_no_bitmap); | |
1142 | ||
1da177e4 | 1143 | /* |
f72ffdd6 | 1144 | * load_super for 0.90.0 |
1da177e4 | 1145 | */ |
3cb03002 | 1146 | static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 | 1147 | { |
1da177e4 LT |
1148 | mdp_super_t *sb; |
1149 | int ret; | |
228fc7d7 | 1150 | bool spare_disk = true; |
1da177e4 LT |
1151 | |
1152 | /* | |
0f420358 | 1153 | * Calculate the position of the superblock (512byte sectors), |
1da177e4 LT |
1154 | * it's at the end of the disk. |
1155 | * | |
1156 | * It also happens to be a multiple of 4Kb. | |
1157 | */ | |
57b2caa3 | 1158 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 1159 | |
0002b271 | 1160 | ret = read_disk_sb(rdev, MD_SB_BYTES); |
9d48739e N |
1161 | if (ret) |
1162 | return ret; | |
1da177e4 LT |
1163 | |
1164 | ret = -EINVAL; | |
1165 | ||
65a06f06 | 1166 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1167 | |
1168 | if (sb->md_magic != MD_SB_MAGIC) { | |
913cce5a CH |
1169 | pr_warn("md: invalid raid superblock magic on %pg\n", |
1170 | rdev->bdev); | |
1da177e4 LT |
1171 | goto abort; |
1172 | } | |
1173 | ||
1174 | if (sb->major_version != 0 || | |
f6705578 N |
1175 | sb->minor_version < 90 || |
1176 | sb->minor_version > 91) { | |
913cce5a CH |
1177 | pr_warn("Bad version number %d.%d on %pg\n", |
1178 | sb->major_version, sb->minor_version, rdev->bdev); | |
1da177e4 LT |
1179 | goto abort; |
1180 | } | |
1181 | ||
1182 | if (sb->raid_disks <= 0) | |
1183 | goto abort; | |
1184 | ||
4d167f09 | 1185 | if (md_csum_fold(calc_sb_csum(sb)) != md_csum_fold(sb->sb_csum)) { |
913cce5a | 1186 | pr_warn("md: invalid superblock checksum on %pg\n", rdev->bdev); |
1da177e4 LT |
1187 | goto abort; |
1188 | } | |
1189 | ||
1190 | rdev->preferred_minor = sb->md_minor; | |
1191 | rdev->data_offset = 0; | |
c6563a8c | 1192 | rdev->new_data_offset = 0; |
0002b271 | 1193 | rdev->sb_size = MD_SB_BYTES; |
9f2f3830 | 1194 | rdev->badblocks.shift = -1; |
1da177e4 LT |
1195 | |
1196 | if (sb->level == LEVEL_MULTIPATH) | |
1197 | rdev->desc_nr = -1; | |
1198 | else | |
1199 | rdev->desc_nr = sb->this_disk.number; | |
1200 | ||
228fc7d7 YY |
1201 | /* not spare disk, or LEVEL_MULTIPATH */ |
1202 | if (sb->level == LEVEL_MULTIPATH || | |
1203 | (rdev->desc_nr >= 0 && | |
3b7436cc | 1204 | rdev->desc_nr < MD_SB_DISKS && |
228fc7d7 YY |
1205 | sb->disks[rdev->desc_nr].state & |
1206 | ((1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE)))) | |
1207 | spare_disk = false; | |
1208 | ||
9a7b2b0f | 1209 | if (!refdev) { |
228fc7d7 | 1210 | if (!spare_disk) |
6a5cb53a YY |
1211 | ret = 1; |
1212 | else | |
1213 | ret = 0; | |
9a7b2b0f | 1214 | } else { |
1da177e4 | 1215 | __u64 ev1, ev2; |
65a06f06 | 1216 | mdp_super_t *refsb = page_address(refdev->sb_page); |
e6fd2093 | 1217 | if (!md_uuid_equal(refsb, sb)) { |
913cce5a CH |
1218 | pr_warn("md: %pg has different UUID to %pg\n", |
1219 | rdev->bdev, refdev->bdev); | |
1da177e4 LT |
1220 | goto abort; |
1221 | } | |
e6fd2093 | 1222 | if (!md_sb_equal(refsb, sb)) { |
913cce5a CH |
1223 | pr_warn("md: %pg has same UUID but different superblock to %pg\n", |
1224 | rdev->bdev, refdev->bdev); | |
1da177e4 LT |
1225 | goto abort; |
1226 | } | |
1227 | ev1 = md_event(sb); | |
1228 | ev2 = md_event(refsb); | |
6a5cb53a | 1229 | |
228fc7d7 | 1230 | if (!spare_disk && ev1 > ev2) |
1da177e4 | 1231 | ret = 1; |
f72ffdd6 | 1232 | else |
1da177e4 LT |
1233 | ret = 0; |
1234 | } | |
8190e754 | 1235 | rdev->sectors = rdev->sb_start; |
667a5313 N |
1236 | /* Limit to 4TB as metadata cannot record more than that. |
1237 | * (not needed for Linear and RAID0 as metadata doesn't | |
1238 | * record this size) | |
1239 | */ | |
72deb455 | 1240 | if ((u64)rdev->sectors >= (2ULL << 32) && sb->level >= 1) |
3312c951 | 1241 | rdev->sectors = (sector_t)(2ULL << 32) - 2; |
1da177e4 | 1242 | |
27a7b260 | 1243 | if (rdev->sectors < ((sector_t)sb->size) * 2 && sb->level >= 1) |
2bf071bf N |
1244 | /* "this cannot possibly happen" ... */ |
1245 | ret = -EINVAL; | |
1246 | ||
1da177e4 LT |
1247 | abort: |
1248 | return ret; | |
1249 | } | |
1250 | ||
1251 | /* | |
1252 | * validate_super for 0.90.0 | |
1253 | */ | |
fd01b88c | 1254 | static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1255 | { |
1256 | mdp_disk_t *desc; | |
65a06f06 | 1257 | mdp_super_t *sb = page_address(rdev->sb_page); |
07d84d10 | 1258 | __u64 ev1 = md_event(sb); |
1da177e4 | 1259 | |
41158c7e | 1260 | rdev->raid_disk = -1; |
c5d79adb N |
1261 | clear_bit(Faulty, &rdev->flags); |
1262 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1263 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1264 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1265 | |
1da177e4 LT |
1266 | if (mddev->raid_disks == 0) { |
1267 | mddev->major_version = 0; | |
1268 | mddev->minor_version = sb->minor_version; | |
1269 | mddev->patch_version = sb->patch_version; | |
e691063a | 1270 | mddev->external = 0; |
9d8f0363 | 1271 | mddev->chunk_sectors = sb->chunk_size >> 9; |
1da177e4 LT |
1272 | mddev->ctime = sb->ctime; |
1273 | mddev->utime = sb->utime; | |
1274 | mddev->level = sb->level; | |
d9d166c2 | 1275 | mddev->clevel[0] = 0; |
1da177e4 LT |
1276 | mddev->layout = sb->layout; |
1277 | mddev->raid_disks = sb->raid_disks; | |
27a7b260 | 1278 | mddev->dev_sectors = ((sector_t)sb->size) * 2; |
07d84d10 | 1279 | mddev->events = ev1; |
c3d9714e | 1280 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1281 | mddev->bitmap_info.space = 0; |
1282 | /* bitmap can use 60 K after the 4K superblocks */ | |
c3d9714e | 1283 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 1284 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
2c810cdd | 1285 | mddev->reshape_backwards = 0; |
1da177e4 | 1286 | |
f6705578 N |
1287 | if (mddev->minor_version >= 91) { |
1288 | mddev->reshape_position = sb->reshape_position; | |
1289 | mddev->delta_disks = sb->delta_disks; | |
1290 | mddev->new_level = sb->new_level; | |
1291 | mddev->new_layout = sb->new_layout; | |
664e7c41 | 1292 | mddev->new_chunk_sectors = sb->new_chunk >> 9; |
2c810cdd N |
1293 | if (mddev->delta_disks < 0) |
1294 | mddev->reshape_backwards = 1; | |
f6705578 N |
1295 | } else { |
1296 | mddev->reshape_position = MaxSector; | |
1297 | mddev->delta_disks = 0; | |
1298 | mddev->new_level = mddev->level; | |
1299 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1300 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 | 1301 | } |
33f2c35a N |
1302 | if (mddev->level == 0) |
1303 | mddev->layout = -1; | |
f6705578 | 1304 | |
1da177e4 LT |
1305 | if (sb->state & (1<<MD_SB_CLEAN)) |
1306 | mddev->recovery_cp = MaxSector; | |
1307 | else { | |
f72ffdd6 | 1308 | if (sb->events_hi == sb->cp_events_hi && |
1da177e4 LT |
1309 | sb->events_lo == sb->cp_events_lo) { |
1310 | mddev->recovery_cp = sb->recovery_cp; | |
1311 | } else | |
1312 | mddev->recovery_cp = 0; | |
1313 | } | |
1314 | ||
1315 | memcpy(mddev->uuid+0, &sb->set_uuid0, 4); | |
1316 | memcpy(mddev->uuid+4, &sb->set_uuid1, 4); | |
1317 | memcpy(mddev->uuid+8, &sb->set_uuid2, 4); | |
1318 | memcpy(mddev->uuid+12,&sb->set_uuid3, 4); | |
1319 | ||
1320 | mddev->max_disks = MD_SB_DISKS; | |
a654b9d8 N |
1321 | |
1322 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT) && | |
6409bb05 | 1323 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1324 | mddev->bitmap_info.offset = |
1325 | mddev->bitmap_info.default_offset; | |
6409bb05 | 1326 | mddev->bitmap_info.space = |
c9ad020f | 1327 | mddev->bitmap_info.default_space; |
6409bb05 | 1328 | } |
a654b9d8 | 1329 | |
41158c7e | 1330 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1331 | /* Insist on good event counter while assembling, except |
1332 | * for spares (which don't need an event count) */ | |
1da177e4 | 1333 | ++ev1; |
be6800a7 N |
1334 | if (sb->disks[rdev->desc_nr].state & ( |
1335 | (1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE))) | |
f72ffdd6 | 1336 | if (ev1 < mddev->events) |
be6800a7 | 1337 | return -EINVAL; |
41158c7e N |
1338 | } else if (mddev->bitmap) { |
1339 | /* if adding to array with a bitmap, then we can accept an | |
1340 | * older device ... but not too old. | |
1341 | */ | |
41158c7e N |
1342 | if (ev1 < mddev->bitmap->events_cleared) |
1343 | return 0; | |
8313b8e5 N |
1344 | if (ev1 < mddev->events) |
1345 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1346 | } else { |
1347 | if (ev1 < mddev->events) | |
1348 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1349 | return 0; | |
1350 | } | |
41158c7e | 1351 | |
1da177e4 | 1352 | if (mddev->level != LEVEL_MULTIPATH) { |
1da177e4 LT |
1353 | desc = sb->disks + rdev->desc_nr; |
1354 | ||
1355 | if (desc->state & (1<<MD_DISK_FAULTY)) | |
b2d444d7 | 1356 | set_bit(Faulty, &rdev->flags); |
7c7546cc N |
1357 | else if (desc->state & (1<<MD_DISK_SYNC) /* && |
1358 | desc->raid_disk < mddev->raid_disks */) { | |
b2d444d7 | 1359 | set_bit(In_sync, &rdev->flags); |
1da177e4 | 1360 | rdev->raid_disk = desc->raid_disk; |
f466722c | 1361 | rdev->saved_raid_disk = desc->raid_disk; |
0261cd9f N |
1362 | } else if (desc->state & (1<<MD_DISK_ACTIVE)) { |
1363 | /* active but not in sync implies recovery up to | |
1364 | * reshape position. We don't know exactly where | |
1365 | * that is, so set to zero for now */ | |
1366 | if (mddev->minor_version >= 91) { | |
1367 | rdev->recovery_offset = 0; | |
1368 | rdev->raid_disk = desc->raid_disk; | |
1369 | } | |
1da177e4 | 1370 | } |
8ddf9efe N |
1371 | if (desc->state & (1<<MD_DISK_WRITEMOSTLY)) |
1372 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1373 | if (desc->state & (1<<MD_DISK_FAILFAST)) |
1374 | set_bit(FailFast, &rdev->flags); | |
41158c7e | 1375 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1376 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1377 | return 0; |
1378 | } | |
1379 | ||
1380 | /* | |
1381 | * sync_super for 0.90.0 | |
1382 | */ | |
fd01b88c | 1383 | static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1384 | { |
1385 | mdp_super_t *sb; | |
3cb03002 | 1386 | struct md_rdev *rdev2; |
1da177e4 | 1387 | int next_spare = mddev->raid_disks; |
19133a42 | 1388 | |
1da177e4 LT |
1389 | /* make rdev->sb match mddev data.. |
1390 | * | |
1391 | * 1/ zero out disks | |
1392 | * 2/ Add info for each disk, keeping track of highest desc_nr (next_spare); | |
1393 | * 3/ any empty disks < next_spare become removed | |
1394 | * | |
1395 | * disks[0] gets initialised to REMOVED because | |
1396 | * we cannot be sure from other fields if it has | |
1397 | * been initialised or not. | |
1398 | */ | |
1399 | int i; | |
1400 | int active=0, working=0,failed=0,spare=0,nr_disks=0; | |
1401 | ||
61181565 N |
1402 | rdev->sb_size = MD_SB_BYTES; |
1403 | ||
65a06f06 | 1404 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1405 | |
1406 | memset(sb, 0, sizeof(*sb)); | |
1407 | ||
1408 | sb->md_magic = MD_SB_MAGIC; | |
1409 | sb->major_version = mddev->major_version; | |
1da177e4 LT |
1410 | sb->patch_version = mddev->patch_version; |
1411 | sb->gvalid_words = 0; /* ignored */ | |
1412 | memcpy(&sb->set_uuid0, mddev->uuid+0, 4); | |
1413 | memcpy(&sb->set_uuid1, mddev->uuid+4, 4); | |
1414 | memcpy(&sb->set_uuid2, mddev->uuid+8, 4); | |
1415 | memcpy(&sb->set_uuid3, mddev->uuid+12,4); | |
1416 | ||
9ebc6ef1 | 1417 | sb->ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 1418 | sb->level = mddev->level; |
58c0fed4 | 1419 | sb->size = mddev->dev_sectors / 2; |
1da177e4 LT |
1420 | sb->raid_disks = mddev->raid_disks; |
1421 | sb->md_minor = mddev->md_minor; | |
e691063a | 1422 | sb->not_persistent = 0; |
9ebc6ef1 | 1423 | sb->utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
1424 | sb->state = 0; |
1425 | sb->events_hi = (mddev->events>>32); | |
1426 | sb->events_lo = (u32)mddev->events; | |
1427 | ||
f6705578 N |
1428 | if (mddev->reshape_position == MaxSector) |
1429 | sb->minor_version = 90; | |
1430 | else { | |
1431 | sb->minor_version = 91; | |
1432 | sb->reshape_position = mddev->reshape_position; | |
1433 | sb->new_level = mddev->new_level; | |
1434 | sb->delta_disks = mddev->delta_disks; | |
1435 | sb->new_layout = mddev->new_layout; | |
664e7c41 | 1436 | sb->new_chunk = mddev->new_chunk_sectors << 9; |
f6705578 N |
1437 | } |
1438 | mddev->minor_version = sb->minor_version; | |
1da177e4 LT |
1439 | if (mddev->in_sync) |
1440 | { | |
1441 | sb->recovery_cp = mddev->recovery_cp; | |
1442 | sb->cp_events_hi = (mddev->events>>32); | |
1443 | sb->cp_events_lo = (u32)mddev->events; | |
1444 | if (mddev->recovery_cp == MaxSector) | |
1445 | sb->state = (1<< MD_SB_CLEAN); | |
1446 | } else | |
1447 | sb->recovery_cp = 0; | |
1448 | ||
1449 | sb->layout = mddev->layout; | |
9d8f0363 | 1450 | sb->chunk_size = mddev->chunk_sectors << 9; |
1da177e4 | 1451 | |
c3d9714e | 1452 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) |
a654b9d8 N |
1453 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); |
1454 | ||
1da177e4 | 1455 | sb->disks[0].state = (1<<MD_DISK_REMOVED); |
dafb20fa | 1456 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1457 | mdp_disk_t *d; |
86e6ffdd | 1458 | int desc_nr; |
0261cd9f N |
1459 | int is_active = test_bit(In_sync, &rdev2->flags); |
1460 | ||
1461 | if (rdev2->raid_disk >= 0 && | |
1462 | sb->minor_version >= 91) | |
1463 | /* we have nowhere to store the recovery_offset, | |
1464 | * but if it is not below the reshape_position, | |
1465 | * we can piggy-back on that. | |
1466 | */ | |
1467 | is_active = 1; | |
1468 | if (rdev2->raid_disk < 0 || | |
1469 | test_bit(Faulty, &rdev2->flags)) | |
1470 | is_active = 0; | |
1471 | if (is_active) | |
86e6ffdd | 1472 | desc_nr = rdev2->raid_disk; |
1da177e4 | 1473 | else |
86e6ffdd | 1474 | desc_nr = next_spare++; |
19133a42 | 1475 | rdev2->desc_nr = desc_nr; |
1da177e4 LT |
1476 | d = &sb->disks[rdev2->desc_nr]; |
1477 | nr_disks++; | |
1478 | d->number = rdev2->desc_nr; | |
1479 | d->major = MAJOR(rdev2->bdev->bd_dev); | |
1480 | d->minor = MINOR(rdev2->bdev->bd_dev); | |
0261cd9f | 1481 | if (is_active) |
1da177e4 LT |
1482 | d->raid_disk = rdev2->raid_disk; |
1483 | else | |
1484 | d->raid_disk = rdev2->desc_nr; /* compatibility */ | |
1be7892f | 1485 | if (test_bit(Faulty, &rdev2->flags)) |
1da177e4 | 1486 | d->state = (1<<MD_DISK_FAULTY); |
0261cd9f | 1487 | else if (is_active) { |
1da177e4 | 1488 | d->state = (1<<MD_DISK_ACTIVE); |
0261cd9f N |
1489 | if (test_bit(In_sync, &rdev2->flags)) |
1490 | d->state |= (1<<MD_DISK_SYNC); | |
1da177e4 LT |
1491 | active++; |
1492 | working++; | |
1493 | } else { | |
1494 | d->state = 0; | |
1495 | spare++; | |
1496 | working++; | |
1497 | } | |
8ddf9efe N |
1498 | if (test_bit(WriteMostly, &rdev2->flags)) |
1499 | d->state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
1500 | if (test_bit(FailFast, &rdev2->flags)) |
1501 | d->state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 | 1502 | } |
1da177e4 LT |
1503 | /* now set the "removed" and "faulty" bits on any missing devices */ |
1504 | for (i=0 ; i < mddev->raid_disks ; i++) { | |
1505 | mdp_disk_t *d = &sb->disks[i]; | |
1506 | if (d->state == 0 && d->number == 0) { | |
1507 | d->number = i; | |
1508 | d->raid_disk = i; | |
1509 | d->state = (1<<MD_DISK_REMOVED); | |
1510 | d->state |= (1<<MD_DISK_FAULTY); | |
1511 | failed++; | |
1512 | } | |
1513 | } | |
1514 | sb->nr_disks = nr_disks; | |
1515 | sb->active_disks = active; | |
1516 | sb->working_disks = working; | |
1517 | sb->failed_disks = failed; | |
1518 | sb->spare_disks = spare; | |
1519 | ||
1520 | sb->this_disk = sb->disks[rdev->desc_nr]; | |
1521 | sb->sb_csum = calc_sb_csum(sb); | |
1522 | } | |
1523 | ||
0cd17fec CW |
1524 | /* |
1525 | * rdev_size_change for 0.90.0 | |
1526 | */ | |
1527 | static unsigned long long | |
3cb03002 | 1528 | super_90_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec | 1529 | { |
58c0fed4 | 1530 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1531 | return 0; /* component must fit device */ |
c3d9714e | 1532 | if (rdev->mddev->bitmap_info.offset) |
0cd17fec | 1533 | return 0; /* can't move bitmap */ |
57b2caa3 | 1534 | rdev->sb_start = calc_dev_sboffset(rdev); |
15f4a5fd AN |
1535 | if (!num_sectors || num_sectors > rdev->sb_start) |
1536 | num_sectors = rdev->sb_start; | |
27a7b260 N |
1537 | /* Limit to 4TB as metadata cannot record more than that. |
1538 | * 4TB == 2^32 KB, or 2*2^32 sectors. | |
1539 | */ | |
72deb455 | 1540 | if ((u64)num_sectors >= (2ULL << 32) && rdev->mddev->level >= 1) |
3312c951 | 1541 | num_sectors = (sector_t)(2ULL << 32) - 2; |
46533ff7 N |
1542 | do { |
1543 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
0cd17fec | 1544 | rdev->sb_page); |
46533ff7 | 1545 | } while (md_super_wait(rdev->mddev) < 0); |
c26a44ed | 1546 | return num_sectors; |
0cd17fec CW |
1547 | } |
1548 | ||
c6563a8c N |
1549 | static int |
1550 | super_90_allow_new_offset(struct md_rdev *rdev, unsigned long long new_offset) | |
1551 | { | |
1552 | /* non-zero offset changes not possible with v0.90 */ | |
1553 | return new_offset == 0; | |
1554 | } | |
0cd17fec | 1555 | |
1da177e4 LT |
1556 | /* |
1557 | * version 1 superblock | |
1558 | */ | |
1559 | ||
f72ffdd6 | 1560 | static __le32 calc_sb_1_csum(struct mdp_superblock_1 *sb) |
1da177e4 | 1561 | { |
1c05b4bc N |
1562 | __le32 disk_csum; |
1563 | u32 csum; | |
1da177e4 LT |
1564 | unsigned long long newcsum; |
1565 | int size = 256 + le32_to_cpu(sb->max_dev)*2; | |
1c05b4bc | 1566 | __le32 *isuper = (__le32*)sb; |
1da177e4 LT |
1567 | |
1568 | disk_csum = sb->sb_csum; | |
1569 | sb->sb_csum = 0; | |
1570 | newcsum = 0; | |
1f3c9907 | 1571 | for (; size >= 4; size -= 4) |
1da177e4 LT |
1572 | newcsum += le32_to_cpu(*isuper++); |
1573 | ||
1574 | if (size == 2) | |
1c05b4bc | 1575 | newcsum += le16_to_cpu(*(__le16*) isuper); |
1da177e4 LT |
1576 | |
1577 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
1578 | sb->sb_csum = disk_csum; | |
1579 | return cpu_to_le32(csum); | |
1580 | } | |
1581 | ||
3cb03002 | 1582 | static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1583 | { |
1584 | struct mdp_superblock_1 *sb; | |
1585 | int ret; | |
0f420358 | 1586 | sector_t sb_start; |
c6563a8c | 1587 | sector_t sectors; |
0002b271 | 1588 | int bmask; |
228fc7d7 | 1589 | bool spare_disk = true; |
1da177e4 LT |
1590 | |
1591 | /* | |
0f420358 | 1592 | * Calculate the position of the superblock in 512byte sectors. |
1da177e4 LT |
1593 | * It is always aligned to a 4K boundary and |
1594 | * depeding on minor_version, it can be: | |
1595 | * 0: At least 8K, but less than 12K, from end of device | |
1596 | * 1: At start of device | |
1597 | * 2: 4K from start of device. | |
1598 | */ | |
1599 | switch(minor_version) { | |
1600 | case 0: | |
0fe80347 | 1601 | sb_start = bdev_nr_sectors(rdev->bdev) - 8 * 2; |
0f420358 | 1602 | sb_start &= ~(sector_t)(4*2-1); |
1da177e4 LT |
1603 | break; |
1604 | case 1: | |
0f420358 | 1605 | sb_start = 0; |
1da177e4 LT |
1606 | break; |
1607 | case 2: | |
0f420358 | 1608 | sb_start = 8; |
1da177e4 LT |
1609 | break; |
1610 | default: | |
1611 | return -EINVAL; | |
1612 | } | |
0f420358 | 1613 | rdev->sb_start = sb_start; |
1da177e4 | 1614 | |
0002b271 N |
1615 | /* superblock is rarely larger than 1K, but it can be larger, |
1616 | * and it is safe to read 4k, so we do that | |
1617 | */ | |
1618 | ret = read_disk_sb(rdev, 4096); | |
1da177e4 LT |
1619 | if (ret) return ret; |
1620 | ||
65a06f06 | 1621 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1622 | |
1623 | if (sb->magic != cpu_to_le32(MD_SB_MAGIC) || | |
1624 | sb->major_version != cpu_to_le32(1) || | |
1625 | le32_to_cpu(sb->max_dev) > (4096-256)/2 || | |
0f420358 | 1626 | le64_to_cpu(sb->super_offset) != rdev->sb_start || |
71c0805c | 1627 | (le32_to_cpu(sb->feature_map) & ~MD_FEATURE_ALL) != 0) |
1da177e4 LT |
1628 | return -EINVAL; |
1629 | ||
1630 | if (calc_sb_1_csum(sb) != sb->sb_csum) { | |
913cce5a CH |
1631 | pr_warn("md: invalid superblock checksum on %pg\n", |
1632 | rdev->bdev); | |
1da177e4 LT |
1633 | return -EINVAL; |
1634 | } | |
1635 | if (le64_to_cpu(sb->data_size) < 10) { | |
913cce5a CH |
1636 | pr_warn("md: data_size too small on %pg\n", |
1637 | rdev->bdev); | |
1da177e4 LT |
1638 | return -EINVAL; |
1639 | } | |
c6563a8c N |
1640 | if (sb->pad0 || |
1641 | sb->pad3[0] || | |
1642 | memcmp(sb->pad3, sb->pad3+1, sizeof(sb->pad3) - sizeof(sb->pad3[1]))) | |
1643 | /* Some padding is non-zero, might be a new feature */ | |
1644 | return -EINVAL; | |
e11e93fa | 1645 | |
1da177e4 LT |
1646 | rdev->preferred_minor = 0xffff; |
1647 | rdev->data_offset = le64_to_cpu(sb->data_offset); | |
c6563a8c N |
1648 | rdev->new_data_offset = rdev->data_offset; |
1649 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE) && | |
1650 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) | |
1651 | rdev->new_data_offset += (s32)le32_to_cpu(sb->new_offset); | |
4dbcdc75 | 1652 | atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read)); |
1da177e4 | 1653 | |
0002b271 | 1654 | rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256; |
e1defc4f | 1655 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; |
0002b271 | 1656 | if (rdev->sb_size & bmask) |
a1801f85 N |
1657 | rdev->sb_size = (rdev->sb_size | bmask) + 1; |
1658 | ||
1659 | if (minor_version | |
0f420358 | 1660 | && rdev->data_offset < sb_start + (rdev->sb_size/512)) |
a1801f85 | 1661 | return -EINVAL; |
c6563a8c N |
1662 | if (minor_version |
1663 | && rdev->new_data_offset < sb_start + (rdev->sb_size/512)) | |
1664 | return -EINVAL; | |
0002b271 | 1665 | |
31b65a0d N |
1666 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH)) |
1667 | rdev->desc_nr = -1; | |
1668 | else | |
1669 | rdev->desc_nr = le32_to_cpu(sb->dev_number); | |
1670 | ||
2699b672 N |
1671 | if (!rdev->bb_page) { |
1672 | rdev->bb_page = alloc_page(GFP_KERNEL); | |
1673 | if (!rdev->bb_page) | |
1674 | return -ENOMEM; | |
1675 | } | |
1676 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BAD_BLOCKS) && | |
1677 | rdev->badblocks.count == 0) { | |
1678 | /* need to load the bad block list. | |
1679 | * Currently we limit it to one page. | |
1680 | */ | |
1681 | s32 offset; | |
1682 | sector_t bb_sector; | |
00485d09 | 1683 | __le64 *bbp; |
2699b672 N |
1684 | int i; |
1685 | int sectors = le16_to_cpu(sb->bblog_size); | |
1686 | if (sectors > (PAGE_SIZE / 512)) | |
1687 | return -EINVAL; | |
1688 | offset = le32_to_cpu(sb->bblog_offset); | |
1689 | if (offset == 0) | |
1690 | return -EINVAL; | |
1691 | bb_sector = (long long)offset; | |
1692 | if (!sync_page_io(rdev, bb_sector, sectors << 9, | |
4ce4c73f | 1693 | rdev->bb_page, REQ_OP_READ, true)) |
2699b672 | 1694 | return -EIO; |
00485d09 | 1695 | bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
1696 | rdev->badblocks.shift = sb->bblog_shift; |
1697 | for (i = 0 ; i < (sectors << (9-3)) ; i++, bbp++) { | |
1698 | u64 bb = le64_to_cpu(*bbp); | |
1699 | int count = bb & (0x3ff); | |
1700 | u64 sector = bb >> 10; | |
1701 | sector <<= sb->bblog_shift; | |
1702 | count <<= sb->bblog_shift; | |
1703 | if (bb + 1 == 0) | |
1704 | break; | |
fc974ee2 | 1705 | if (badblocks_set(&rdev->badblocks, sector, count, 1)) |
2699b672 N |
1706 | return -EINVAL; |
1707 | } | |
486adf72 N |
1708 | } else if (sb->bblog_offset != 0) |
1709 | rdev->badblocks.shift = 0; | |
2699b672 | 1710 | |
ddc08823 PB |
1711 | if ((le32_to_cpu(sb->feature_map) & |
1712 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS))) { | |
ea0213e0 AP |
1713 | rdev->ppl.offset = (__s16)le16_to_cpu(sb->ppl.offset); |
1714 | rdev->ppl.size = le16_to_cpu(sb->ppl.size); | |
1715 | rdev->ppl.sector = rdev->sb_start + rdev->ppl.offset; | |
1716 | } | |
1717 | ||
33f2c35a N |
1718 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT) && |
1719 | sb->level != 0) | |
1720 | return -EINVAL; | |
1721 | ||
228fc7d7 YY |
1722 | /* not spare disk, or LEVEL_MULTIPATH */ |
1723 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH) || | |
1724 | (rdev->desc_nr >= 0 && | |
1725 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
1726 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || | |
1727 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL))) | |
1728 | spare_disk = false; | |
6a5cb53a | 1729 | |
9a7b2b0f | 1730 | if (!refdev) { |
228fc7d7 | 1731 | if (!spare_disk) |
6a5cb53a YY |
1732 | ret = 1; |
1733 | else | |
1734 | ret = 0; | |
9a7b2b0f | 1735 | } else { |
1da177e4 | 1736 | __u64 ev1, ev2; |
65a06f06 | 1737 | struct mdp_superblock_1 *refsb = page_address(refdev->sb_page); |
1da177e4 LT |
1738 | |
1739 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16) != 0 || | |
1740 | sb->level != refsb->level || | |
1741 | sb->layout != refsb->layout || | |
1742 | sb->chunksize != refsb->chunksize) { | |
913cce5a CH |
1743 | pr_warn("md: %pg has strangely different superblock to %pg\n", |
1744 | rdev->bdev, | |
1745 | refdev->bdev); | |
1da177e4 LT |
1746 | return -EINVAL; |
1747 | } | |
1748 | ev1 = le64_to_cpu(sb->events); | |
1749 | ev2 = le64_to_cpu(refsb->events); | |
1750 | ||
228fc7d7 | 1751 | if (!spare_disk && ev1 > ev2) |
8ed75463 N |
1752 | ret = 1; |
1753 | else | |
1754 | ret = 0; | |
1da177e4 | 1755 | } |
0fe80347 CH |
1756 | if (minor_version) |
1757 | sectors = bdev_nr_sectors(rdev->bdev) - rdev->data_offset; | |
1758 | else | |
c6563a8c N |
1759 | sectors = rdev->sb_start; |
1760 | if (sectors < le64_to_cpu(sb->data_size)) | |
1da177e4 | 1761 | return -EINVAL; |
dd8ac336 | 1762 | rdev->sectors = le64_to_cpu(sb->data_size); |
8ed75463 | 1763 | return ret; |
1da177e4 LT |
1764 | } |
1765 | ||
fd01b88c | 1766 | static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 1767 | { |
65a06f06 | 1768 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
07d84d10 | 1769 | __u64 ev1 = le64_to_cpu(sb->events); |
1da177e4 | 1770 | |
41158c7e | 1771 | rdev->raid_disk = -1; |
c5d79adb N |
1772 | clear_bit(Faulty, &rdev->flags); |
1773 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1774 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1775 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1776 | |
1da177e4 LT |
1777 | if (mddev->raid_disks == 0) { |
1778 | mddev->major_version = 1; | |
1779 | mddev->patch_version = 0; | |
e691063a | 1780 | mddev->external = 0; |
9d8f0363 | 1781 | mddev->chunk_sectors = le32_to_cpu(sb->chunksize); |
9ebc6ef1 DD |
1782 | mddev->ctime = le64_to_cpu(sb->ctime); |
1783 | mddev->utime = le64_to_cpu(sb->utime); | |
1da177e4 | 1784 | mddev->level = le32_to_cpu(sb->level); |
d9d166c2 | 1785 | mddev->clevel[0] = 0; |
1da177e4 LT |
1786 | mddev->layout = le32_to_cpu(sb->layout); |
1787 | mddev->raid_disks = le32_to_cpu(sb->raid_disks); | |
58c0fed4 | 1788 | mddev->dev_sectors = le64_to_cpu(sb->size); |
07d84d10 | 1789 | mddev->events = ev1; |
c3d9714e | 1790 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1791 | mddev->bitmap_info.space = 0; |
1792 | /* Default location for bitmap is 1K after superblock | |
1793 | * using 3K - total of 4K | |
1794 | */ | |
c3d9714e | 1795 | mddev->bitmap_info.default_offset = 1024 >> 9; |
6409bb05 | 1796 | mddev->bitmap_info.default_space = (4096-1024) >> 9; |
2c810cdd N |
1797 | mddev->reshape_backwards = 0; |
1798 | ||
1da177e4 LT |
1799 | mddev->recovery_cp = le64_to_cpu(sb->resync_offset); |
1800 | memcpy(mddev->uuid, sb->set_uuid, 16); | |
1801 | ||
1802 | mddev->max_disks = (4096-256)/2; | |
a654b9d8 | 1803 | |
71c0805c | 1804 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) && |
6409bb05 | 1805 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1806 | mddev->bitmap_info.offset = |
1807 | (__s32)le32_to_cpu(sb->bitmap_offset); | |
6409bb05 N |
1808 | /* Metadata doesn't record how much space is available. |
1809 | * For 1.0, we assume we can use up to the superblock | |
1810 | * if before, else to 4K beyond superblock. | |
1811 | * For others, assume no change is possible. | |
1812 | */ | |
1813 | if (mddev->minor_version > 0) | |
1814 | mddev->bitmap_info.space = 0; | |
1815 | else if (mddev->bitmap_info.offset > 0) | |
1816 | mddev->bitmap_info.space = | |
1817 | 8 - mddev->bitmap_info.offset; | |
1818 | else | |
1819 | mddev->bitmap_info.space = | |
1820 | -mddev->bitmap_info.offset; | |
1821 | } | |
e11e93fa | 1822 | |
f6705578 N |
1823 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { |
1824 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); | |
1825 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); | |
1826 | mddev->new_level = le32_to_cpu(sb->new_level); | |
1827 | mddev->new_layout = le32_to_cpu(sb->new_layout); | |
664e7c41 | 1828 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_chunk); |
2c810cdd N |
1829 | if (mddev->delta_disks < 0 || |
1830 | (mddev->delta_disks == 0 && | |
1831 | (le32_to_cpu(sb->feature_map) | |
1832 | & MD_FEATURE_RESHAPE_BACKWARDS))) | |
1833 | mddev->reshape_backwards = 1; | |
f6705578 N |
1834 | } else { |
1835 | mddev->reshape_position = MaxSector; | |
1836 | mddev->delta_disks = 0; | |
1837 | mddev->new_level = mddev->level; | |
1838 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1839 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1840 | } |
1841 | ||
33f2c35a N |
1842 | if (mddev->level == 0 && |
1843 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT)) | |
1844 | mddev->layout = -1; | |
1845 | ||
486b0f7b | 1846 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL) |
a62ab49e | 1847 | set_bit(MD_HAS_JOURNAL, &mddev->flags); |
ea0213e0 | 1848 | |
ddc08823 PB |
1849 | if (le32_to_cpu(sb->feature_map) & |
1850 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS)) { | |
ea0213e0 AP |
1851 | if (le32_to_cpu(sb->feature_map) & |
1852 | (MD_FEATURE_BITMAP_OFFSET | MD_FEATURE_JOURNAL)) | |
1853 | return -EINVAL; | |
ddc08823 PB |
1854 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_PPL) && |
1855 | (le32_to_cpu(sb->feature_map) & | |
1856 | MD_FEATURE_MULTIPLE_PPLS)) | |
1857 | return -EINVAL; | |
ea0213e0 AP |
1858 | set_bit(MD_HAS_PPL, &mddev->flags); |
1859 | } | |
41158c7e | 1860 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1861 | /* Insist of good event counter while assembling, except for |
1862 | * spares (which don't need an event count) */ | |
1da177e4 | 1863 | ++ev1; |
be6800a7 N |
1864 | if (rdev->desc_nr >= 0 && |
1865 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
a3dfbdaa SL |
1866 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || |
1867 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL)) | |
be6800a7 N |
1868 | if (ev1 < mddev->events) |
1869 | return -EINVAL; | |
41158c7e N |
1870 | } else if (mddev->bitmap) { |
1871 | /* If adding to array with a bitmap, then we can accept an | |
1872 | * older device, but not too old. | |
1873 | */ | |
41158c7e N |
1874 | if (ev1 < mddev->bitmap->events_cleared) |
1875 | return 0; | |
8313b8e5 N |
1876 | if (ev1 < mddev->events) |
1877 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1878 | } else { |
1879 | if (ev1 < mddev->events) | |
1880 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1881 | return 0; | |
1882 | } | |
1da177e4 LT |
1883 | if (mddev->level != LEVEL_MULTIPATH) { |
1884 | int role; | |
3673f305 N |
1885 | if (rdev->desc_nr < 0 || |
1886 | rdev->desc_nr >= le32_to_cpu(sb->max_dev)) { | |
c4d4c91b | 1887 | role = MD_DISK_ROLE_SPARE; |
3673f305 N |
1888 | rdev->desc_nr = -1; |
1889 | } else | |
1890 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
1da177e4 | 1891 | switch(role) { |
c4d4c91b | 1892 | case MD_DISK_ROLE_SPARE: /* spare */ |
1da177e4 | 1893 | break; |
c4d4c91b | 1894 | case MD_DISK_ROLE_FAULTY: /* faulty */ |
b2d444d7 | 1895 | set_bit(Faulty, &rdev->flags); |
1da177e4 | 1896 | break; |
bac624f3 SL |
1897 | case MD_DISK_ROLE_JOURNAL: /* journal device */ |
1898 | if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL)) { | |
1899 | /* journal device without journal feature */ | |
9d48739e | 1900 | pr_warn("md: journal device provided without journal feature, ignoring the device\n"); |
bac624f3 SL |
1901 | return -EINVAL; |
1902 | } | |
1903 | set_bit(Journal, &rdev->flags); | |
3069aa8d | 1904 | rdev->journal_tail = le64_to_cpu(sb->journal_tail); |
9b15603d | 1905 | rdev->raid_disk = 0; |
bac624f3 | 1906 | break; |
1da177e4 | 1907 | default: |
f466722c | 1908 | rdev->saved_raid_disk = role; |
5fd6c1dc | 1909 | if ((le32_to_cpu(sb->feature_map) & |
f466722c | 1910 | MD_FEATURE_RECOVERY_OFFSET)) { |
5fd6c1dc | 1911 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); |
f466722c N |
1912 | if (!(le32_to_cpu(sb->feature_map) & |
1913 | MD_FEATURE_RECOVERY_BITMAP)) | |
1914 | rdev->saved_raid_disk = -1; | |
062f5b2a GJ |
1915 | } else { |
1916 | /* | |
1917 | * If the array is FROZEN, then the device can't | |
1918 | * be in_sync with rest of array. | |
1919 | */ | |
1920 | if (!test_bit(MD_RECOVERY_FROZEN, | |
1921 | &mddev->recovery)) | |
1922 | set_bit(In_sync, &rdev->flags); | |
1923 | } | |
1da177e4 LT |
1924 | rdev->raid_disk = role; |
1925 | break; | |
1926 | } | |
8ddf9efe N |
1927 | if (sb->devflags & WriteMostly1) |
1928 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1929 | if (sb->devflags & FailFast1) |
1930 | set_bit(FailFast, &rdev->flags); | |
2d78f8c4 N |
1931 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) |
1932 | set_bit(Replacement, &rdev->flags); | |
41158c7e | 1933 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1934 | set_bit(In_sync, &rdev->flags); |
41158c7e | 1935 | |
1da177e4 LT |
1936 | return 0; |
1937 | } | |
1938 | ||
fd01b88c | 1939 | static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1940 | { |
1941 | struct mdp_superblock_1 *sb; | |
3cb03002 | 1942 | struct md_rdev *rdev2; |
1da177e4 LT |
1943 | int max_dev, i; |
1944 | /* make rdev->sb match mddev and rdev data. */ | |
1945 | ||
65a06f06 | 1946 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1947 | |
1948 | sb->feature_map = 0; | |
1949 | sb->pad0 = 0; | |
5fd6c1dc | 1950 | sb->recovery_offset = cpu_to_le64(0); |
1da177e4 LT |
1951 | memset(sb->pad3, 0, sizeof(sb->pad3)); |
1952 | ||
1953 | sb->utime = cpu_to_le64((__u64)mddev->utime); | |
1954 | sb->events = cpu_to_le64(mddev->events); | |
1955 | if (mddev->in_sync) | |
1956 | sb->resync_offset = cpu_to_le64(mddev->recovery_cp); | |
bd18f646 SL |
1957 | else if (test_bit(MD_JOURNAL_CLEAN, &mddev->flags)) |
1958 | sb->resync_offset = cpu_to_le64(MaxSector); | |
1da177e4 LT |
1959 | else |
1960 | sb->resync_offset = cpu_to_le64(0); | |
1961 | ||
1c05b4bc | 1962 | sb->cnt_corrected_read = cpu_to_le32(atomic_read(&rdev->corrected_errors)); |
4dbcdc75 | 1963 | |
f0ca340c | 1964 | sb->raid_disks = cpu_to_le32(mddev->raid_disks); |
58c0fed4 | 1965 | sb->size = cpu_to_le64(mddev->dev_sectors); |
9d8f0363 | 1966 | sb->chunksize = cpu_to_le32(mddev->chunk_sectors); |
62e1e389 N |
1967 | sb->level = cpu_to_le32(mddev->level); |
1968 | sb->layout = cpu_to_le32(mddev->layout); | |
688834e6 N |
1969 | if (test_bit(FailFast, &rdev->flags)) |
1970 | sb->devflags |= FailFast1; | |
1971 | else | |
1972 | sb->devflags &= ~FailFast1; | |
f0ca340c | 1973 | |
aeb9b211 N |
1974 | if (test_bit(WriteMostly, &rdev->flags)) |
1975 | sb->devflags |= WriteMostly1; | |
1976 | else | |
1977 | sb->devflags &= ~WriteMostly1; | |
c6563a8c N |
1978 | sb->data_offset = cpu_to_le64(rdev->data_offset); |
1979 | sb->data_size = cpu_to_le64(rdev->sectors); | |
aeb9b211 | 1980 | |
c3d9714e N |
1981 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) { |
1982 | sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset); | |
71c0805c | 1983 | sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); |
a654b9d8 | 1984 | } |
5fd6c1dc | 1985 | |
f2076e7d | 1986 | if (rdev->raid_disk >= 0 && !test_bit(Journal, &rdev->flags) && |
97e4f42d | 1987 | !test_bit(In_sync, &rdev->flags)) { |
93be75ff N |
1988 | sb->feature_map |= |
1989 | cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET); | |
1990 | sb->recovery_offset = | |
1991 | cpu_to_le64(rdev->recovery_offset); | |
f466722c N |
1992 | if (rdev->saved_raid_disk >= 0 && mddev->bitmap) |
1993 | sb->feature_map |= | |
1994 | cpu_to_le32(MD_FEATURE_RECOVERY_BITMAP); | |
5fd6c1dc | 1995 | } |
3069aa8d SL |
1996 | /* Note: recovery_offset and journal_tail share space */ |
1997 | if (test_bit(Journal, &rdev->flags)) | |
1998 | sb->journal_tail = cpu_to_le64(rdev->journal_tail); | |
2d78f8c4 N |
1999 | if (test_bit(Replacement, &rdev->flags)) |
2000 | sb->feature_map |= | |
2001 | cpu_to_le32(MD_FEATURE_REPLACEMENT); | |
5fd6c1dc | 2002 | |
f6705578 N |
2003 | if (mddev->reshape_position != MaxSector) { |
2004 | sb->feature_map |= cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); | |
2005 | sb->reshape_position = cpu_to_le64(mddev->reshape_position); | |
2006 | sb->new_layout = cpu_to_le32(mddev->new_layout); | |
2007 | sb->delta_disks = cpu_to_le32(mddev->delta_disks); | |
2008 | sb->new_level = cpu_to_le32(mddev->new_level); | |
664e7c41 | 2009 | sb->new_chunk = cpu_to_le32(mddev->new_chunk_sectors); |
2c810cdd N |
2010 | if (mddev->delta_disks == 0 && |
2011 | mddev->reshape_backwards) | |
2012 | sb->feature_map | |
2013 | |= cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS); | |
c6563a8c N |
2014 | if (rdev->new_data_offset != rdev->data_offset) { |
2015 | sb->feature_map | |
2016 | |= cpu_to_le32(MD_FEATURE_NEW_OFFSET); | |
2017 | sb->new_offset = cpu_to_le32((__u32)(rdev->new_data_offset | |
2018 | - rdev->data_offset)); | |
2019 | } | |
f6705578 | 2020 | } |
a654b9d8 | 2021 | |
3c462c88 GR |
2022 | if (mddev_is_clustered(mddev)) |
2023 | sb->feature_map |= cpu_to_le32(MD_FEATURE_CLUSTERED); | |
2024 | ||
2699b672 N |
2025 | if (rdev->badblocks.count == 0) |
2026 | /* Nothing to do for bad blocks*/ ; | |
2027 | else if (sb->bblog_offset == 0) | |
2028 | /* Cannot record bad blocks on this device */ | |
2029 | md_error(mddev, rdev); | |
2030 | else { | |
2031 | struct badblocks *bb = &rdev->badblocks; | |
ae50640b | 2032 | __le64 *bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
2033 | u64 *p = bb->page; |
2034 | sb->feature_map |= cpu_to_le32(MD_FEATURE_BAD_BLOCKS); | |
2035 | if (bb->changed) { | |
2036 | unsigned seq; | |
2037 | ||
2038 | retry: | |
2039 | seq = read_seqbegin(&bb->lock); | |
2040 | ||
2041 | memset(bbp, 0xff, PAGE_SIZE); | |
2042 | ||
2043 | for (i = 0 ; i < bb->count ; i++) { | |
35f9ac2d | 2044 | u64 internal_bb = p[i]; |
2699b672 N |
2045 | u64 store_bb = ((BB_OFFSET(internal_bb) << 10) |
2046 | | BB_LEN(internal_bb)); | |
35f9ac2d | 2047 | bbp[i] = cpu_to_le64(store_bb); |
2699b672 | 2048 | } |
d0962936 | 2049 | bb->changed = 0; |
2699b672 N |
2050 | if (read_seqretry(&bb->lock, seq)) |
2051 | goto retry; | |
2052 | ||
2053 | bb->sector = (rdev->sb_start + | |
2054 | (int)le32_to_cpu(sb->bblog_offset)); | |
2055 | bb->size = le16_to_cpu(sb->bblog_size); | |
2699b672 N |
2056 | } |
2057 | } | |
2058 | ||
1da177e4 | 2059 | max_dev = 0; |
dafb20fa | 2060 | rdev_for_each(rdev2, mddev) |
1da177e4 LT |
2061 | if (rdev2->desc_nr+1 > max_dev) |
2062 | max_dev = rdev2->desc_nr+1; | |
a778b73f | 2063 | |
70471daf N |
2064 | if (max_dev > le32_to_cpu(sb->max_dev)) { |
2065 | int bmask; | |
a778b73f | 2066 | sb->max_dev = cpu_to_le32(max_dev); |
70471daf N |
2067 | rdev->sb_size = max_dev * 2 + 256; |
2068 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; | |
2069 | if (rdev->sb_size & bmask) | |
2070 | rdev->sb_size = (rdev->sb_size | bmask) + 1; | |
ddcf3522 N |
2071 | } else |
2072 | max_dev = le32_to_cpu(sb->max_dev); | |
2073 | ||
1da177e4 | 2074 | for (i=0; i<max_dev;i++) |
8df72024 | 2075 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
f72ffdd6 | 2076 | |
a97b7896 SL |
2077 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) |
2078 | sb->feature_map |= cpu_to_le32(MD_FEATURE_JOURNAL); | |
f72ffdd6 | 2079 | |
ea0213e0 | 2080 | if (test_bit(MD_HAS_PPL, &mddev->flags)) { |
ddc08823 PB |
2081 | if (test_bit(MD_HAS_MULTIPLE_PPLS, &mddev->flags)) |
2082 | sb->feature_map |= | |
2083 | cpu_to_le32(MD_FEATURE_MULTIPLE_PPLS); | |
2084 | else | |
2085 | sb->feature_map |= cpu_to_le32(MD_FEATURE_PPL); | |
ea0213e0 AP |
2086 | sb->ppl.offset = cpu_to_le16(rdev->ppl.offset); |
2087 | sb->ppl.size = cpu_to_le16(rdev->ppl.size); | |
2088 | } | |
2089 | ||
dafb20fa | 2090 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 2091 | i = rdev2->desc_nr; |
b2d444d7 | 2092 | if (test_bit(Faulty, &rdev2->flags)) |
c4d4c91b | 2093 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY); |
b2d444d7 | 2094 | else if (test_bit(In_sync, &rdev2->flags)) |
1da177e4 | 2095 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
a97b7896 | 2096 | else if (test_bit(Journal, &rdev2->flags)) |
bac624f3 | 2097 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_JOURNAL); |
93be75ff | 2098 | else if (rdev2->raid_disk >= 0) |
5fd6c1dc | 2099 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
1da177e4 | 2100 | else |
c4d4c91b | 2101 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
1da177e4 LT |
2102 | } |
2103 | ||
1da177e4 LT |
2104 | sb->sb_csum = calc_sb_1_csum(sb); |
2105 | } | |
2106 | ||
d9c0fa50 XN |
2107 | static sector_t super_1_choose_bm_space(sector_t dev_size) |
2108 | { | |
2109 | sector_t bm_space; | |
2110 | ||
2111 | /* if the device is bigger than 8Gig, save 64k for bitmap | |
2112 | * usage, if bigger than 200Gig, save 128k | |
2113 | */ | |
2114 | if (dev_size < 64*2) | |
2115 | bm_space = 0; | |
2116 | else if (dev_size - 64*2 >= 200*1024*1024*2) | |
2117 | bm_space = 128*2; | |
2118 | else if (dev_size - 4*2 > 8*1024*1024*2) | |
2119 | bm_space = 64*2; | |
2120 | else | |
2121 | bm_space = 4*2; | |
2122 | return bm_space; | |
2123 | } | |
2124 | ||
0cd17fec | 2125 | static unsigned long long |
3cb03002 | 2126 | super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec CW |
2127 | { |
2128 | struct mdp_superblock_1 *sb; | |
15f4a5fd | 2129 | sector_t max_sectors; |
58c0fed4 | 2130 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 2131 | return 0; /* component must fit device */ |
c6563a8c N |
2132 | if (rdev->data_offset != rdev->new_data_offset) |
2133 | return 0; /* too confusing */ | |
0f420358 | 2134 | if (rdev->sb_start < rdev->data_offset) { |
0cd17fec | 2135 | /* minor versions 1 and 2; superblock before data */ |
0fe80347 | 2136 | max_sectors = bdev_nr_sectors(rdev->bdev) - rdev->data_offset; |
15f4a5fd AN |
2137 | if (!num_sectors || num_sectors > max_sectors) |
2138 | num_sectors = max_sectors; | |
c3d9714e | 2139 | } else if (rdev->mddev->bitmap_info.offset) { |
0cd17fec CW |
2140 | /* minor version 0 with bitmap we can't move */ |
2141 | return 0; | |
2142 | } else { | |
2143 | /* minor version 0; superblock after data */ | |
d9c0fa50 | 2144 | sector_t sb_start, bm_space; |
0fe80347 | 2145 | sector_t dev_size = bdev_nr_sectors(rdev->bdev); |
d9c0fa50 XN |
2146 | |
2147 | /* 8K is for superblock */ | |
2148 | sb_start = dev_size - 8*2; | |
0f420358 | 2149 | sb_start &= ~(sector_t)(4*2 - 1); |
d9c0fa50 XN |
2150 | |
2151 | bm_space = super_1_choose_bm_space(dev_size); | |
2152 | ||
2153 | /* Space that can be used to store date needs to decrease | |
2154 | * superblock bitmap space and bad block space(4K) | |
2155 | */ | |
2156 | max_sectors = sb_start - bm_space - 4*2; | |
2157 | ||
15f4a5fd AN |
2158 | if (!num_sectors || num_sectors > max_sectors) |
2159 | num_sectors = max_sectors; | |
55df1ce0 | 2160 | rdev->sb_start = sb_start; |
0cd17fec | 2161 | } |
65a06f06 | 2162 | sb = page_address(rdev->sb_page); |
15f4a5fd | 2163 | sb->data_size = cpu_to_le64(num_sectors); |
3fb632e4 | 2164 | sb->super_offset = cpu_to_le64(rdev->sb_start); |
0cd17fec | 2165 | sb->sb_csum = calc_sb_1_csum(sb); |
46533ff7 N |
2166 | do { |
2167 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
2168 | rdev->sb_page); | |
2169 | } while (md_super_wait(rdev->mddev) < 0); | |
c26a44ed | 2170 | return num_sectors; |
c6563a8c N |
2171 | |
2172 | } | |
2173 | ||
2174 | static int | |
2175 | super_1_allow_new_offset(struct md_rdev *rdev, | |
2176 | unsigned long long new_offset) | |
2177 | { | |
2178 | /* All necessary checks on new >= old have been done */ | |
2179 | struct bitmap *bitmap; | |
2180 | if (new_offset >= rdev->data_offset) | |
2181 | return 1; | |
2182 | ||
2183 | /* with 1.0 metadata, there is no metadata to tread on | |
2184 | * so we can always move back */ | |
2185 | if (rdev->mddev->minor_version == 0) | |
2186 | return 1; | |
2187 | ||
2188 | /* otherwise we must be sure not to step on | |
2189 | * any metadata, so stay: | |
2190 | * 36K beyond start of superblock | |
2191 | * beyond end of badblocks | |
2192 | * beyond write-intent bitmap | |
2193 | */ | |
2194 | if (rdev->sb_start + (32+4)*2 > new_offset) | |
2195 | return 0; | |
2196 | bitmap = rdev->mddev->bitmap; | |
2197 | if (bitmap && !rdev->mddev->bitmap_info.file && | |
2198 | rdev->sb_start + rdev->mddev->bitmap_info.offset + | |
1ec885cd | 2199 | bitmap->storage.file_pages * (PAGE_SIZE>>9) > new_offset) |
c6563a8c N |
2200 | return 0; |
2201 | if (rdev->badblocks.sector + rdev->badblocks.size > new_offset) | |
2202 | return 0; | |
2203 | ||
2204 | return 1; | |
0cd17fec | 2205 | } |
1da177e4 | 2206 | |
75c96f85 | 2207 | static struct super_type super_types[] = { |
1da177e4 LT |
2208 | [0] = { |
2209 | .name = "0.90.0", | |
2210 | .owner = THIS_MODULE, | |
0cd17fec CW |
2211 | .load_super = super_90_load, |
2212 | .validate_super = super_90_validate, | |
2213 | .sync_super = super_90_sync, | |
2214 | .rdev_size_change = super_90_rdev_size_change, | |
c6563a8c | 2215 | .allow_new_offset = super_90_allow_new_offset, |
1da177e4 LT |
2216 | }, |
2217 | [1] = { | |
2218 | .name = "md-1", | |
2219 | .owner = THIS_MODULE, | |
0cd17fec CW |
2220 | .load_super = super_1_load, |
2221 | .validate_super = super_1_validate, | |
2222 | .sync_super = super_1_sync, | |
2223 | .rdev_size_change = super_1_rdev_size_change, | |
c6563a8c | 2224 | .allow_new_offset = super_1_allow_new_offset, |
1da177e4 LT |
2225 | }, |
2226 | }; | |
1da177e4 | 2227 | |
fd01b88c | 2228 | static void sync_super(struct mddev *mddev, struct md_rdev *rdev) |
076f968b JB |
2229 | { |
2230 | if (mddev->sync_super) { | |
2231 | mddev->sync_super(mddev, rdev); | |
2232 | return; | |
2233 | } | |
2234 | ||
2235 | BUG_ON(mddev->major_version >= ARRAY_SIZE(super_types)); | |
2236 | ||
2237 | super_types[mddev->major_version].sync_super(mddev, rdev); | |
2238 | } | |
2239 | ||
fd01b88c | 2240 | static int match_mddev_units(struct mddev *mddev1, struct mddev *mddev2) |
1da177e4 | 2241 | { |
3cb03002 | 2242 | struct md_rdev *rdev, *rdev2; |
1da177e4 | 2243 | |
4b80991c | 2244 | rcu_read_lock(); |
0b020e85 SL |
2245 | rdev_for_each_rcu(rdev, mddev1) { |
2246 | if (test_bit(Faulty, &rdev->flags) || | |
2247 | test_bit(Journal, &rdev->flags) || | |
2248 | rdev->raid_disk == -1) | |
2249 | continue; | |
2250 | rdev_for_each_rcu(rdev2, mddev2) { | |
2251 | if (test_bit(Faulty, &rdev2->flags) || | |
2252 | test_bit(Journal, &rdev2->flags) || | |
2253 | rdev2->raid_disk == -1) | |
2254 | continue; | |
61a27e1f | 2255 | if (rdev->bdev->bd_disk == rdev2->bdev->bd_disk) { |
4b80991c | 2256 | rcu_read_unlock(); |
7dd5e7c3 | 2257 | return 1; |
4b80991c | 2258 | } |
0b020e85 SL |
2259 | } |
2260 | } | |
4b80991c | 2261 | rcu_read_unlock(); |
1da177e4 LT |
2262 | return 0; |
2263 | } | |
2264 | ||
2265 | static LIST_HEAD(pending_raid_disks); | |
2266 | ||
ac5e7113 AN |
2267 | /* |
2268 | * Try to register data integrity profile for an mddev | |
2269 | * | |
2270 | * This is called when an array is started and after a disk has been kicked | |
2271 | * from the array. It only succeeds if all working and active component devices | |
2272 | * are integrity capable with matching profiles. | |
2273 | */ | |
fd01b88c | 2274 | int md_integrity_register(struct mddev *mddev) |
ac5e7113 | 2275 | { |
3cb03002 | 2276 | struct md_rdev *rdev, *reference = NULL; |
ac5e7113 AN |
2277 | |
2278 | if (list_empty(&mddev->disks)) | |
2279 | return 0; /* nothing to do */ | |
629acb6a JB |
2280 | if (!mddev->gendisk || blk_get_integrity(mddev->gendisk)) |
2281 | return 0; /* shouldn't register, or already is */ | |
dafb20fa | 2282 | rdev_for_each(rdev, mddev) { |
ac5e7113 AN |
2283 | /* skip spares and non-functional disks */ |
2284 | if (test_bit(Faulty, &rdev->flags)) | |
2285 | continue; | |
2286 | if (rdev->raid_disk < 0) | |
2287 | continue; | |
ac5e7113 AN |
2288 | if (!reference) { |
2289 | /* Use the first rdev as the reference */ | |
2290 | reference = rdev; | |
2291 | continue; | |
2292 | } | |
2293 | /* does this rdev's profile match the reference profile? */ | |
2294 | if (blk_integrity_compare(reference->bdev->bd_disk, | |
2295 | rdev->bdev->bd_disk) < 0) | |
2296 | return -EINVAL; | |
2297 | } | |
89078d57 MP |
2298 | if (!reference || !bdev_get_integrity(reference->bdev)) |
2299 | return 0; | |
ac5e7113 AN |
2300 | /* |
2301 | * All component devices are integrity capable and have matching | |
2302 | * profiles, register the common profile for the md device. | |
2303 | */ | |
25520d55 MP |
2304 | blk_integrity_register(mddev->gendisk, |
2305 | bdev_get_integrity(reference->bdev)); | |
2306 | ||
9d48739e | 2307 | pr_debug("md: data integrity enabled on %s\n", mdname(mddev)); |
10764815 | 2308 | if (bioset_integrity_create(&mddev->bio_set, BIO_POOL_SIZE) || |
daee2024 GJ |
2309 | (mddev->level != 1 && mddev->level != 10 && |
2310 | bioset_integrity_create(&mddev->io_acct_set, BIO_POOL_SIZE))) { | |
de3ea66e GJ |
2311 | /* |
2312 | * No need to handle the failure of bioset_integrity_create, | |
2313 | * because the function is called by md_run() -> pers->run(), | |
2314 | * md_run calls bioset_exit -> bioset_integrity_free in case | |
2315 | * of failure case. | |
2316 | */ | |
9d48739e | 2317 | pr_err("md: failed to create integrity pool for %s\n", |
a91a2785 MP |
2318 | mdname(mddev)); |
2319 | return -EINVAL; | |
2320 | } | |
ac5e7113 AN |
2321 | return 0; |
2322 | } | |
2323 | EXPORT_SYMBOL(md_integrity_register); | |
2324 | ||
1501efad DW |
2325 | /* |
2326 | * Attempt to add an rdev, but only if it is consistent with the current | |
2327 | * integrity profile | |
2328 | */ | |
2329 | int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev) | |
3f9d99c1 | 2330 | { |
2863b9eb JB |
2331 | struct blk_integrity *bi_mddev; |
2332 | ||
2333 | if (!mddev->gendisk) | |
1501efad | 2334 | return 0; |
2863b9eb | 2335 | |
2863b9eb | 2336 | bi_mddev = blk_get_integrity(mddev->gendisk); |
3f9d99c1 | 2337 | |
ac5e7113 | 2338 | if (!bi_mddev) /* nothing to do */ |
1501efad DW |
2339 | return 0; |
2340 | ||
2341 | if (blk_integrity_compare(mddev->gendisk, rdev->bdev->bd_disk) != 0) { | |
913cce5a CH |
2342 | pr_err("%s: incompatible integrity profile for %pg\n", |
2343 | mdname(mddev), rdev->bdev); | |
1501efad DW |
2344 | return -ENXIO; |
2345 | } | |
2346 | ||
2347 | return 0; | |
3f9d99c1 | 2348 | } |
ac5e7113 | 2349 | EXPORT_SYMBOL(md_integrity_add_rdev); |
3f9d99c1 | 2350 | |
d7a47838 CH |
2351 | static bool rdev_read_only(struct md_rdev *rdev) |
2352 | { | |
2353 | return bdev_read_only(rdev->bdev) || | |
2354 | (rdev->meta_bdev && bdev_read_only(rdev->meta_bdev)); | |
2355 | } | |
2356 | ||
f72ffdd6 | 2357 | static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) |
1da177e4 | 2358 | { |
7dd5e7c3 | 2359 | char b[BDEVNAME_SIZE]; |
5e55e2f5 | 2360 | int err; |
1da177e4 | 2361 | |
11e2ede0 DW |
2362 | /* prevent duplicates */ |
2363 | if (find_rdev(mddev, rdev->bdev->bd_dev)) | |
2364 | return -EEXIST; | |
2365 | ||
d7a47838 | 2366 | if (rdev_read_only(rdev) && mddev->pers) |
97b20ef7 N |
2367 | return -EROFS; |
2368 | ||
dd8ac336 | 2369 | /* make sure rdev->sectors exceeds mddev->dev_sectors */ |
f6b6ec5c SL |
2370 | if (!test_bit(Journal, &rdev->flags) && |
2371 | rdev->sectors && | |
2372 | (mddev->dev_sectors == 0 || rdev->sectors < mddev->dev_sectors)) { | |
a778b73f N |
2373 | if (mddev->pers) { |
2374 | /* Cannot change size, so fail | |
2375 | * If mddev->level <= 0, then we don't care | |
2376 | * about aligning sizes (e.g. linear) | |
2377 | */ | |
2378 | if (mddev->level > 0) | |
2379 | return -ENOSPC; | |
2380 | } else | |
dd8ac336 | 2381 | mddev->dev_sectors = rdev->sectors; |
2bf071bf | 2382 | } |
1da177e4 LT |
2383 | |
2384 | /* Verify rdev->desc_nr is unique. | |
2385 | * If it is -1, assign a free number, else | |
2386 | * check number is not in use | |
2387 | */ | |
4878e9eb | 2388 | rcu_read_lock(); |
1da177e4 LT |
2389 | if (rdev->desc_nr < 0) { |
2390 | int choice = 0; | |
4878e9eb N |
2391 | if (mddev->pers) |
2392 | choice = mddev->raid_disks; | |
57d051dc | 2393 | while (md_find_rdev_nr_rcu(mddev, choice)) |
1da177e4 LT |
2394 | choice++; |
2395 | rdev->desc_nr = choice; | |
2396 | } else { | |
57d051dc | 2397 | if (md_find_rdev_nr_rcu(mddev, rdev->desc_nr)) { |
4878e9eb | 2398 | rcu_read_unlock(); |
1da177e4 | 2399 | return -EBUSY; |
4878e9eb | 2400 | } |
1da177e4 | 2401 | } |
4878e9eb | 2402 | rcu_read_unlock(); |
f6b6ec5c SL |
2403 | if (!test_bit(Journal, &rdev->flags) && |
2404 | mddev->max_disks && rdev->desc_nr >= mddev->max_disks) { | |
9d48739e N |
2405 | pr_warn("md: %s: array is limited to %d devices\n", |
2406 | mdname(mddev), mddev->max_disks); | |
de01dfad N |
2407 | return -EBUSY; |
2408 | } | |
900d156b | 2409 | snprintf(b, sizeof(b), "%pg", rdev->bdev); |
90a9befb | 2410 | strreplace(b, '/', '!'); |
649316b2 | 2411 | |
1da177e4 | 2412 | rdev->mddev = mddev; |
9d48739e | 2413 | pr_debug("md: bind<%s>\n", b); |
86e6ffdd | 2414 | |
963c555e | 2415 | if (mddev->raid_disks) |
404659cf | 2416 | mddev_create_serial_pool(mddev, rdev, false); |
963c555e | 2417 | |
b2d6db58 | 2418 | if ((err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b))) |
5e55e2f5 | 2419 | goto fail; |
86e6ffdd | 2420 | |
5e3b8a8d | 2421 | /* failure here is OK */ |
8d65269f | 2422 | err = sysfs_create_link(&rdev->kobj, bdev_kobj(rdev->bdev), "block"); |
00bcb4ac | 2423 | rdev->sysfs_state = sysfs_get_dirent_safe(rdev->kobj.sd, "state"); |
e1a86dbb JB |
2424 | rdev->sysfs_unack_badblocks = |
2425 | sysfs_get_dirent_safe(rdev->kobj.sd, "unacknowledged_bad_blocks"); | |
2426 | rdev->sysfs_badblocks = | |
2427 | sysfs_get_dirent_safe(rdev->kobj.sd, "bad_blocks"); | |
3c0ee63a | 2428 | |
4b80991c | 2429 | list_add_rcu(&rdev->same_set, &mddev->disks); |
e09b457b | 2430 | bd_link_disk_holder(rdev->bdev, mddev->gendisk); |
4044ba58 N |
2431 | |
2432 | /* May as well allow recovery to be retried once */ | |
5389042f | 2433 | mddev->recovery_disabled++; |
3f9d99c1 | 2434 | |
1da177e4 | 2435 | return 0; |
5e55e2f5 N |
2436 | |
2437 | fail: | |
9d48739e N |
2438 | pr_warn("md: failed to register dev-%s for %s\n", |
2439 | b, mdname(mddev)); | |
5e55e2f5 | 2440 | return err; |
1da177e4 LT |
2441 | } |
2442 | ||
cc1ffe61 | 2443 | static void rdev_delayed_delete(struct work_struct *ws) |
5792a285 | 2444 | { |
3cb03002 | 2445 | struct md_rdev *rdev = container_of(ws, struct md_rdev, del_work); |
5792a285 | 2446 | kobject_del(&rdev->kobj); |
177a99b2 | 2447 | kobject_put(&rdev->kobj); |
5792a285 N |
2448 | } |
2449 | ||
b5c1acf0 CH |
2450 | void md_autodetect_dev(dev_t dev); |
2451 | ||
2452 | static void export_rdev(struct md_rdev *rdev) | |
2453 | { | |
2454 | pr_debug("md: export_rdev(%pg)\n", rdev->bdev); | |
2455 | md_rdev_clear(rdev); | |
2456 | #ifndef MODULE | |
2457 | if (test_bit(AutoDetected, &rdev->flags)) | |
2458 | md_autodetect_dev(rdev->bdev->bd_dev); | |
2459 | #endif | |
2460 | blkdev_put(rdev->bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
2461 | rdev->bdev = NULL; | |
2462 | kobject_put(&rdev->kobj); | |
2463 | } | |
2464 | ||
2465 | static void md_kick_rdev_from_array(struct md_rdev *rdev) | |
1da177e4 | 2466 | { |
49731baa | 2467 | bd_unlink_disk_holder(rdev->bdev, rdev->mddev->gendisk); |
4b80991c | 2468 | list_del_rcu(&rdev->same_set); |
913cce5a | 2469 | pr_debug("md: unbind<%pg>\n", rdev->bdev); |
11d3a9f6 | 2470 | mddev_destroy_serial_pool(rdev->mddev, rdev, false); |
1da177e4 | 2471 | rdev->mddev = NULL; |
86e6ffdd | 2472 | sysfs_remove_link(&rdev->kobj, "block"); |
3c0ee63a | 2473 | sysfs_put(rdev->sysfs_state); |
e1a86dbb JB |
2474 | sysfs_put(rdev->sysfs_unack_badblocks); |
2475 | sysfs_put(rdev->sysfs_badblocks); | |
3c0ee63a | 2476 | rdev->sysfs_state = NULL; |
e1a86dbb JB |
2477 | rdev->sysfs_unack_badblocks = NULL; |
2478 | rdev->sysfs_badblocks = NULL; | |
2230dfe4 | 2479 | rdev->badblocks.count = 0; |
5792a285 | 2480 | /* We need to delay this, otherwise we can deadlock when |
4b80991c N |
2481 | * writing to 'remove' to "dev/state". We also need |
2482 | * to delay it due to rcu usage. | |
5792a285 | 2483 | */ |
4b80991c | 2484 | synchronize_rcu(); |
cc1ffe61 | 2485 | INIT_WORK(&rdev->del_work, rdev_delayed_delete); |
177a99b2 | 2486 | kobject_get(&rdev->kobj); |
cc1ffe61 | 2487 | queue_work(md_rdev_misc_wq, &rdev->del_work); |
1da177e4 LT |
2488 | export_rdev(rdev); |
2489 | } | |
2490 | ||
fd01b88c | 2491 | static void export_array(struct mddev *mddev) |
1da177e4 | 2492 | { |
0638bb0e | 2493 | struct md_rdev *rdev; |
1da177e4 | 2494 | |
0638bb0e N |
2495 | while (!list_empty(&mddev->disks)) { |
2496 | rdev = list_first_entry(&mddev->disks, struct md_rdev, | |
2497 | same_set); | |
fb56dfef | 2498 | md_kick_rdev_from_array(rdev); |
1da177e4 | 2499 | } |
1da177e4 LT |
2500 | mddev->raid_disks = 0; |
2501 | mddev->major_version = 0; | |
2502 | } | |
2503 | ||
6497709b N |
2504 | static bool set_in_sync(struct mddev *mddev) |
2505 | { | |
efa4b77b | 2506 | lockdep_assert_held(&mddev->lock); |
4ad23a97 N |
2507 | if (!mddev->in_sync) { |
2508 | mddev->sync_checkers++; | |
2509 | spin_unlock(&mddev->lock); | |
2510 | percpu_ref_switch_to_atomic_sync(&mddev->writes_pending); | |
2511 | spin_lock(&mddev->lock); | |
2512 | if (!mddev->in_sync && | |
2513 | percpu_ref_is_zero(&mddev->writes_pending)) { | |
6497709b | 2514 | mddev->in_sync = 1; |
4ad23a97 N |
2515 | /* |
2516 | * Ensure ->in_sync is visible before we clear | |
2517 | * ->sync_checkers. | |
2518 | */ | |
55cc39f3 | 2519 | smp_mb(); |
6497709b N |
2520 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2521 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
2522 | } | |
4ad23a97 N |
2523 | if (--mddev->sync_checkers == 0) |
2524 | percpu_ref_switch_to_percpu(&mddev->writes_pending); | |
6497709b N |
2525 | } |
2526 | if (mddev->safemode == 1) | |
2527 | mddev->safemode = 0; | |
2528 | return mddev->in_sync; | |
2529 | } | |
2530 | ||
f72ffdd6 | 2531 | static void sync_sbs(struct mddev *mddev, int nospares) |
1da177e4 | 2532 | { |
42543769 N |
2533 | /* Update each superblock (in-memory image), but |
2534 | * if we are allowed to, skip spares which already | |
2535 | * have the right event counter, or have one earlier | |
2536 | * (which would mean they aren't being marked as dirty | |
2537 | * with the rest of the array) | |
2538 | */ | |
3cb03002 | 2539 | struct md_rdev *rdev; |
dafb20fa | 2540 | rdev_for_each(rdev, mddev) { |
42543769 N |
2541 | if (rdev->sb_events == mddev->events || |
2542 | (nospares && | |
2543 | rdev->raid_disk < 0 && | |
42543769 N |
2544 | rdev->sb_events+1 == mddev->events)) { |
2545 | /* Don't update this superblock */ | |
2546 | rdev->sb_loaded = 2; | |
2547 | } else { | |
076f968b | 2548 | sync_super(mddev, rdev); |
42543769 N |
2549 | rdev->sb_loaded = 1; |
2550 | } | |
1da177e4 LT |
2551 | } |
2552 | } | |
2553 | ||
2aa82191 GR |
2554 | static bool does_sb_need_changing(struct mddev *mddev) |
2555 | { | |
fc873834 | 2556 | struct md_rdev *rdev = NULL, *iter; |
2aa82191 GR |
2557 | struct mdp_superblock_1 *sb; |
2558 | int role; | |
2559 | ||
2560 | /* Find a good rdev */ | |
fc873834 XT |
2561 | rdev_for_each(iter, mddev) |
2562 | if ((iter->raid_disk >= 0) && !test_bit(Faulty, &iter->flags)) { | |
2563 | rdev = iter; | |
2aa82191 | 2564 | break; |
fc873834 | 2565 | } |
2aa82191 GR |
2566 | |
2567 | /* No good device found. */ | |
2568 | if (!rdev) | |
2569 | return false; | |
2570 | ||
2571 | sb = page_address(rdev->sb_page); | |
2572 | /* Check if a device has become faulty or a spare become active */ | |
2573 | rdev_for_each(rdev, mddev) { | |
2574 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
2575 | /* Device activated? */ | |
9151ad5d | 2576 | if (role == MD_DISK_ROLE_SPARE && rdev->raid_disk >= 0 && |
2aa82191 GR |
2577 | !test_bit(Faulty, &rdev->flags)) |
2578 | return true; | |
2579 | /* Device turned faulty? */ | |
9151ad5d | 2580 | if (test_bit(Faulty, &rdev->flags) && (role < MD_DISK_ROLE_MAX)) |
2aa82191 GR |
2581 | return true; |
2582 | } | |
2583 | ||
2584 | /* Check if any mddev parameters have changed */ | |
2585 | if ((mddev->dev_sectors != le64_to_cpu(sb->size)) || | |
2586 | (mddev->reshape_position != le64_to_cpu(sb->reshape_position)) || | |
13459213 | 2587 | (mddev->layout != le32_to_cpu(sb->layout)) || |
2aa82191 GR |
2588 | (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) || |
2589 | (mddev->chunk_sectors != le32_to_cpu(sb->chunksize))) | |
2590 | return true; | |
2591 | ||
2592 | return false; | |
2593 | } | |
2594 | ||
1aee41f6 | 2595 | void md_update_sb(struct mddev *mddev, int force_change) |
1da177e4 | 2596 | { |
3cb03002 | 2597 | struct md_rdev *rdev; |
06d91a5f | 2598 | int sync_req; |
42543769 | 2599 | int nospares = 0; |
2699b672 | 2600 | int any_badblocks_changed = 0; |
23b63f9f | 2601 | int ret = -1; |
1da177e4 | 2602 | |
f97a5528 | 2603 | if (!md_is_rdwr(mddev)) { |
d87f064f | 2604 | if (force_change) |
2953079c | 2605 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
d87f064f N |
2606 | return; |
2607 | } | |
2aa82191 | 2608 | |
2c97cf13 | 2609 | repeat: |
2aa82191 | 2610 | if (mddev_is_clustered(mddev)) { |
2953079c | 2611 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
2aa82191 | 2612 | force_change = 1; |
2953079c | 2613 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
85ad1d13 | 2614 | nospares = 1; |
23b63f9f | 2615 | ret = md_cluster_ops->metadata_update_start(mddev); |
2aa82191 GR |
2616 | /* Has someone else has updated the sb */ |
2617 | if (!does_sb_need_changing(mddev)) { | |
23b63f9f GJ |
2618 | if (ret == 0) |
2619 | md_cluster_ops->metadata_update_cancel(mddev); | |
2953079c SL |
2620 | bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2621 | BIT(MD_SB_CHANGE_DEVS) | | |
2622 | BIT(MD_SB_CHANGE_CLEAN)); | |
2aa82191 GR |
2623 | return; |
2624 | } | |
2625 | } | |
2c97cf13 | 2626 | |
db0505d3 N |
2627 | /* |
2628 | * First make sure individual recovery_offsets are correct | |
2629 | * curr_resync_completed can only be used during recovery. | |
2630 | * During reshape/resync it might use array-addresses rather | |
2631 | * that device addresses. | |
2632 | */ | |
dafb20fa | 2633 | rdev_for_each(rdev, mddev) { |
3a3a5ddb N |
2634 | if (rdev->raid_disk >= 0 && |
2635 | mddev->delta_disks >= 0 && | |
db0505d3 N |
2636 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
2637 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery) && | |
2638 | !test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
f2076e7d | 2639 | !test_bit(Journal, &rdev->flags) && |
3a3a5ddb N |
2640 | !test_bit(In_sync, &rdev->flags) && |
2641 | mddev->curr_resync_completed > rdev->recovery_offset) | |
2642 | rdev->recovery_offset = mddev->curr_resync_completed; | |
2643 | ||
f72ffdd6 | 2644 | } |
bd52b746 | 2645 | if (!mddev->persistent) { |
2953079c SL |
2646 | clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2647 | clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
de393cde | 2648 | if (!mddev->external) { |
2953079c | 2649 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
dafb20fa | 2650 | rdev_for_each(rdev, mddev) { |
de393cde | 2651 | if (rdev->badblocks.changed) { |
d0962936 | 2652 | rdev->badblocks.changed = 0; |
fc974ee2 | 2653 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2654 | md_error(mddev, rdev); |
2655 | } | |
2656 | clear_bit(Blocked, &rdev->flags); | |
2657 | clear_bit(BlockedBadBlocks, &rdev->flags); | |
2658 | wake_up(&rdev->blocked_wait); | |
2659 | } | |
2660 | } | |
3a3a5ddb N |
2661 | wake_up(&mddev->sb_wait); |
2662 | return; | |
2663 | } | |
2664 | ||
85572d7c | 2665 | spin_lock(&mddev->lock); |
84692195 | 2666 | |
9ebc6ef1 | 2667 | mddev->utime = ktime_get_real_seconds(); |
3a3a5ddb | 2668 | |
2953079c | 2669 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
850b2b42 | 2670 | force_change = 1; |
2953079c | 2671 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
850b2b42 N |
2672 | /* just a clean<-> dirty transition, possibly leave spares alone, |
2673 | * though if events isn't the right even/odd, we will have to do | |
2674 | * spares after all | |
2675 | */ | |
2676 | nospares = 1; | |
2677 | if (force_change) | |
2678 | nospares = 0; | |
2679 | if (mddev->degraded) | |
84692195 N |
2680 | /* If the array is degraded, then skipping spares is both |
2681 | * dangerous and fairly pointless. | |
2682 | * Dangerous because a device that was removed from the array | |
2683 | * might have a event_count that still looks up-to-date, | |
2684 | * so it can be re-added without a resync. | |
2685 | * Pointless because if there are any spares to skip, | |
2686 | * then a recovery will happen and soon that array won't | |
2687 | * be degraded any more and the spare can go back to sleep then. | |
2688 | */ | |
850b2b42 | 2689 | nospares = 0; |
84692195 | 2690 | |
06d91a5f | 2691 | sync_req = mddev->in_sync; |
42543769 N |
2692 | |
2693 | /* If this is just a dirty<->clean transition, and the array is clean | |
2694 | * and 'events' is odd, we can roll back to the previous clean state */ | |
850b2b42 | 2695 | if (nospares |
42543769 | 2696 | && (mddev->in_sync && mddev->recovery_cp == MaxSector) |
a8707c08 N |
2697 | && mddev->can_decrease_events |
2698 | && mddev->events != 1) { | |
42543769 | 2699 | mddev->events--; |
a8707c08 N |
2700 | mddev->can_decrease_events = 0; |
2701 | } else { | |
42543769 N |
2702 | /* otherwise we have to go forward and ... */ |
2703 | mddev->events ++; | |
a8707c08 | 2704 | mddev->can_decrease_events = nospares; |
42543769 | 2705 | } |
1da177e4 | 2706 | |
403df478 N |
2707 | /* |
2708 | * This 64-bit counter should never wrap. | |
2709 | * Either we are in around ~1 trillion A.C., assuming | |
2710 | * 1 reboot per second, or we have a bug... | |
2711 | */ | |
2712 | WARN_ON(mddev->events == 0); | |
2699b672 | 2713 | |
dafb20fa | 2714 | rdev_for_each(rdev, mddev) { |
2699b672 N |
2715 | if (rdev->badblocks.changed) |
2716 | any_badblocks_changed++; | |
de393cde N |
2717 | if (test_bit(Faulty, &rdev->flags)) |
2718 | set_bit(FaultRecorded, &rdev->flags); | |
2719 | } | |
2699b672 | 2720 | |
e691063a | 2721 | sync_sbs(mddev, nospares); |
85572d7c | 2722 | spin_unlock(&mddev->lock); |
1da177e4 | 2723 | |
36a4e1fe N |
2724 | pr_debug("md: updating %s RAID superblock on device (in sync %d)\n", |
2725 | mdname(mddev), mddev->in_sync); | |
1da177e4 | 2726 | |
504634f6 SL |
2727 | if (mddev->queue) |
2728 | blk_add_trace_msg(mddev->queue, "md md_update_sb"); | |
46533ff7 | 2729 | rewrite: |
e64e4018 | 2730 | md_bitmap_update_sb(mddev->bitmap); |
dafb20fa | 2731 | rdev_for_each(rdev, mddev) { |
42543769 N |
2732 | if (rdev->sb_loaded != 1) |
2733 | continue; /* no noise on spare devices */ | |
1da177e4 | 2734 | |
f466722c | 2735 | if (!test_bit(Faulty, &rdev->flags)) { |
7bfa19f2 | 2736 | md_super_write(mddev,rdev, |
0f420358 | 2737 | rdev->sb_start, rdev->sb_size, |
7bfa19f2 | 2738 | rdev->sb_page); |
913cce5a CH |
2739 | pr_debug("md: (write) %pg's sb offset: %llu\n", |
2740 | rdev->bdev, | |
36a4e1fe | 2741 | (unsigned long long)rdev->sb_start); |
42543769 | 2742 | rdev->sb_events = mddev->events; |
2699b672 N |
2743 | if (rdev->badblocks.size) { |
2744 | md_super_write(mddev, rdev, | |
2745 | rdev->badblocks.sector, | |
2746 | rdev->badblocks.size << 9, | |
2747 | rdev->bb_page); | |
2748 | rdev->badblocks.size = 0; | |
2749 | } | |
7bfa19f2 | 2750 | |
f466722c | 2751 | } else |
913cce5a CH |
2752 | pr_debug("md: %pg (skipping faulty)\n", |
2753 | rdev->bdev); | |
d70ed2e4 | 2754 | |
7bfa19f2 | 2755 | if (mddev->level == LEVEL_MULTIPATH) |
1da177e4 LT |
2756 | /* only need to write one superblock... */ |
2757 | break; | |
2758 | } | |
46533ff7 N |
2759 | if (md_super_wait(mddev) < 0) |
2760 | goto rewrite; | |
2953079c | 2761 | /* if there was a failure, MD_SB_CHANGE_DEVS was set, and we re-write super */ |
7bfa19f2 | 2762 | |
2c97cf13 GJ |
2763 | if (mddev_is_clustered(mddev) && ret == 0) |
2764 | md_cluster_ops->metadata_update_finish(mddev); | |
2765 | ||
850b2b42 | 2766 | if (mddev->in_sync != sync_req || |
2953079c SL |
2767 | !bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2768 | BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_CLEAN))) | |
06d91a5f | 2769 | /* have to write it out again */ |
06d91a5f | 2770 | goto repeat; |
3d310eb7 | 2771 | wake_up(&mddev->sb_wait); |
acb180b0 | 2772 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
e1a86dbb | 2773 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
06d91a5f | 2774 | |
dafb20fa | 2775 | rdev_for_each(rdev, mddev) { |
de393cde N |
2776 | if (test_and_clear_bit(FaultRecorded, &rdev->flags)) |
2777 | clear_bit(Blocked, &rdev->flags); | |
2778 | ||
2779 | if (any_badblocks_changed) | |
fc974ee2 | 2780 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2781 | clear_bit(BlockedBadBlocks, &rdev->flags); |
2782 | wake_up(&rdev->blocked_wait); | |
2783 | } | |
1da177e4 | 2784 | } |
1aee41f6 | 2785 | EXPORT_SYMBOL(md_update_sb); |
1da177e4 | 2786 | |
a6da4ef8 GR |
2787 | static int add_bound_rdev(struct md_rdev *rdev) |
2788 | { | |
2789 | struct mddev *mddev = rdev->mddev; | |
2790 | int err = 0; | |
87d4d916 | 2791 | bool add_journal = test_bit(Journal, &rdev->flags); |
a6da4ef8 | 2792 | |
87d4d916 | 2793 | if (!mddev->pers->hot_remove_disk || add_journal) { |
a6da4ef8 GR |
2794 | /* If there is hot_add_disk but no hot_remove_disk |
2795 | * then added disks for geometry changes, | |
2796 | * and should be added immediately. | |
2797 | */ | |
2798 | super_types[mddev->major_version]. | |
2799 | validate_super(mddev, rdev); | |
87d4d916 SL |
2800 | if (add_journal) |
2801 | mddev_suspend(mddev); | |
a6da4ef8 | 2802 | err = mddev->pers->hot_add_disk(mddev, rdev); |
87d4d916 SL |
2803 | if (add_journal) |
2804 | mddev_resume(mddev); | |
a6da4ef8 | 2805 | if (err) { |
db767672 | 2806 | md_kick_rdev_from_array(rdev); |
a6da4ef8 GR |
2807 | return err; |
2808 | } | |
2809 | } | |
2810 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2811 | ||
2953079c | 2812 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a6da4ef8 GR |
2813 | if (mddev->degraded) |
2814 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
2815 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
54679486 | 2816 | md_new_event(); |
a6da4ef8 GR |
2817 | md_wakeup_thread(mddev->thread); |
2818 | return 0; | |
2819 | } | |
1da177e4 | 2820 | |
7f6ce769 | 2821 | /* words written to sysfs files may, or may not, be \n terminated. |
bce74dac N |
2822 | * We want to accept with case. For this we use cmd_match. |
2823 | */ | |
2824 | static int cmd_match(const char *cmd, const char *str) | |
2825 | { | |
2826 | /* See if cmd, written into a sysfs file, matches | |
2827 | * str. They must either be the same, or cmd can | |
2828 | * have a trailing newline | |
2829 | */ | |
2830 | while (*cmd && *str && *cmd == *str) { | |
2831 | cmd++; | |
2832 | str++; | |
2833 | } | |
2834 | if (*cmd == '\n') | |
2835 | cmd++; | |
2836 | if (*str || *cmd) | |
2837 | return 0; | |
2838 | return 1; | |
2839 | } | |
2840 | ||
86e6ffdd N |
2841 | struct rdev_sysfs_entry { |
2842 | struct attribute attr; | |
3cb03002 N |
2843 | ssize_t (*show)(struct md_rdev *, char *); |
2844 | ssize_t (*store)(struct md_rdev *, const char *, size_t); | |
86e6ffdd N |
2845 | }; |
2846 | ||
2847 | static ssize_t | |
3cb03002 | 2848 | state_show(struct md_rdev *rdev, char *page) |
86e6ffdd | 2849 | { |
35b785f7 | 2850 | char *sep = ","; |
20a49ff6 | 2851 | size_t len = 0; |
6aa7de05 | 2852 | unsigned long flags = READ_ONCE(rdev->flags); |
86e6ffdd | 2853 | |
758bfc8a | 2854 | if (test_bit(Faulty, &flags) || |
dcbcb486 TM |
2855 | (!test_bit(ExternalBbl, &flags) && |
2856 | rdev->badblocks.unacked_exist)) | |
35b785f7 TM |
2857 | len += sprintf(page+len, "faulty%s", sep); |
2858 | if (test_bit(In_sync, &flags)) | |
2859 | len += sprintf(page+len, "in_sync%s", sep); | |
2860 | if (test_bit(Journal, &flags)) | |
2861 | len += sprintf(page+len, "journal%s", sep); | |
2862 | if (test_bit(WriteMostly, &flags)) | |
2863 | len += sprintf(page+len, "write_mostly%s", sep); | |
758bfc8a | 2864 | if (test_bit(Blocked, &flags) || |
52c64152 | 2865 | (rdev->badblocks.unacked_exist |
35b785f7 TM |
2866 | && !test_bit(Faulty, &flags))) |
2867 | len += sprintf(page+len, "blocked%s", sep); | |
758bfc8a | 2868 | if (!test_bit(Faulty, &flags) && |
f2076e7d | 2869 | !test_bit(Journal, &flags) && |
35b785f7 TM |
2870 | !test_bit(In_sync, &flags)) |
2871 | len += sprintf(page+len, "spare%s", sep); | |
2872 | if (test_bit(WriteErrorSeen, &flags)) | |
2873 | len += sprintf(page+len, "write_error%s", sep); | |
2874 | if (test_bit(WantReplacement, &flags)) | |
2875 | len += sprintf(page+len, "want_replacement%s", sep); | |
2876 | if (test_bit(Replacement, &flags)) | |
2877 | len += sprintf(page+len, "replacement%s", sep); | |
2878 | if (test_bit(ExternalBbl, &flags)) | |
2879 | len += sprintf(page+len, "external_bbl%s", sep); | |
688834e6 N |
2880 | if (test_bit(FailFast, &flags)) |
2881 | len += sprintf(page+len, "failfast%s", sep); | |
35b785f7 TM |
2882 | |
2883 | if (len) | |
2884 | len -= strlen(sep); | |
2d78f8c4 | 2885 | |
86e6ffdd N |
2886 | return len+sprintf(page+len, "\n"); |
2887 | } | |
2888 | ||
45dc2de1 | 2889 | static ssize_t |
3cb03002 | 2890 | state_store(struct md_rdev *rdev, const char *buf, size_t len) |
45dc2de1 N |
2891 | { |
2892 | /* can write | |
de393cde | 2893 | * faulty - simulates an error |
45dc2de1 | 2894 | * remove - disconnects the device |
f655675b N |
2895 | * writemostly - sets write_mostly |
2896 | * -writemostly - clears write_mostly | |
de393cde N |
2897 | * blocked - sets the Blocked flags |
2898 | * -blocked - clears the Blocked and possibly simulates an error | |
6d56e278 | 2899 | * insync - sets Insync providing device isn't active |
f466722c N |
2900 | * -insync - clear Insync for a device with a slot assigned, |
2901 | * so that it gets rebuilt based on bitmap | |
d7a9d443 N |
2902 | * write_error - sets WriteErrorSeen |
2903 | * -write_error - clears WriteErrorSeen | |
688834e6 | 2904 | * {,-}failfast - set/clear FailFast |
45dc2de1 | 2905 | */ |
8b9e2291 XN |
2906 | |
2907 | struct mddev *mddev = rdev->mddev; | |
45dc2de1 | 2908 | int err = -EINVAL; |
8b9e2291 XN |
2909 | bool need_update_sb = false; |
2910 | ||
45dc2de1 N |
2911 | if (cmd_match(buf, "faulty") && rdev->mddev->pers) { |
2912 | md_error(rdev->mddev, rdev); | |
9631abdb MT |
2913 | |
2914 | if (test_bit(MD_BROKEN, &rdev->mddev->flags)) | |
5ef56c8f | 2915 | err = -EBUSY; |
9631abdb MT |
2916 | else |
2917 | err = 0; | |
45dc2de1 | 2918 | } else if (cmd_match(buf, "remove")) { |
5d881783 SL |
2919 | if (rdev->mddev->pers) { |
2920 | clear_bit(Blocked, &rdev->flags); | |
2921 | remove_and_add_spares(rdev->mddev, rdev); | |
2922 | } | |
45dc2de1 N |
2923 | if (rdev->raid_disk >= 0) |
2924 | err = -EBUSY; | |
2925 | else { | |
45dc2de1 | 2926 | err = 0; |
a9720903 GJ |
2927 | if (mddev_is_clustered(mddev)) |
2928 | err = md_cluster_ops->remove_disk(mddev, rdev); | |
2929 | ||
2930 | if (err == 0) { | |
2931 | md_kick_rdev_from_array(rdev); | |
060b0689 | 2932 | if (mddev->pers) { |
2953079c | 2933 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
2934 | md_wakeup_thread(mddev->thread); |
2935 | } | |
54679486 | 2936 | md_new_event(); |
a9720903 | 2937 | } |
45dc2de1 | 2938 | } |
f655675b N |
2939 | } else if (cmd_match(buf, "writemostly")) { |
2940 | set_bit(WriteMostly, &rdev->flags); | |
404659cf | 2941 | mddev_create_serial_pool(rdev->mddev, rdev, false); |
8b9e2291 | 2942 | need_update_sb = true; |
f655675b N |
2943 | err = 0; |
2944 | } else if (cmd_match(buf, "-writemostly")) { | |
11d3a9f6 | 2945 | mddev_destroy_serial_pool(rdev->mddev, rdev, false); |
f655675b | 2946 | clear_bit(WriteMostly, &rdev->flags); |
8b9e2291 | 2947 | need_update_sb = true; |
6bfe0b49 DW |
2948 | err = 0; |
2949 | } else if (cmd_match(buf, "blocked")) { | |
2950 | set_bit(Blocked, &rdev->flags); | |
2951 | err = 0; | |
2952 | } else if (cmd_match(buf, "-blocked")) { | |
de393cde | 2953 | if (!test_bit(Faulty, &rdev->flags) && |
dcbcb486 | 2954 | !test_bit(ExternalBbl, &rdev->flags) && |
7da64a0a | 2955 | rdev->badblocks.unacked_exist) { |
de393cde N |
2956 | /* metadata handler doesn't understand badblocks, |
2957 | * so we need to fail the device | |
2958 | */ | |
2959 | md_error(rdev->mddev, rdev); | |
2960 | } | |
6bfe0b49 | 2961 | clear_bit(Blocked, &rdev->flags); |
de393cde | 2962 | clear_bit(BlockedBadBlocks, &rdev->flags); |
6bfe0b49 DW |
2963 | wake_up(&rdev->blocked_wait); |
2964 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
2965 | md_wakeup_thread(rdev->mddev->thread); | |
2966 | ||
6d56e278 N |
2967 | err = 0; |
2968 | } else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) { | |
2969 | set_bit(In_sync, &rdev->flags); | |
f655675b | 2970 | err = 0; |
688834e6 N |
2971 | } else if (cmd_match(buf, "failfast")) { |
2972 | set_bit(FailFast, &rdev->flags); | |
8b9e2291 | 2973 | need_update_sb = true; |
688834e6 N |
2974 | err = 0; |
2975 | } else if (cmd_match(buf, "-failfast")) { | |
2976 | clear_bit(FailFast, &rdev->flags); | |
8b9e2291 | 2977 | need_update_sb = true; |
688834e6 | 2978 | err = 0; |
f2076e7d SL |
2979 | } else if (cmd_match(buf, "-insync") && rdev->raid_disk >= 0 && |
2980 | !test_bit(Journal, &rdev->flags)) { | |
e1960f8c N |
2981 | if (rdev->mddev->pers == NULL) { |
2982 | clear_bit(In_sync, &rdev->flags); | |
2983 | rdev->saved_raid_disk = rdev->raid_disk; | |
2984 | rdev->raid_disk = -1; | |
2985 | err = 0; | |
2986 | } | |
d7a9d443 N |
2987 | } else if (cmd_match(buf, "write_error")) { |
2988 | set_bit(WriteErrorSeen, &rdev->flags); | |
2989 | err = 0; | |
2990 | } else if (cmd_match(buf, "-write_error")) { | |
2991 | clear_bit(WriteErrorSeen, &rdev->flags); | |
2992 | err = 0; | |
2d78f8c4 N |
2993 | } else if (cmd_match(buf, "want_replacement")) { |
2994 | /* Any non-spare device that is not a replacement can | |
2995 | * become want_replacement at any time, but we then need to | |
2996 | * check if recovery is needed. | |
2997 | */ | |
2998 | if (rdev->raid_disk >= 0 && | |
f2076e7d | 2999 | !test_bit(Journal, &rdev->flags) && |
2d78f8c4 N |
3000 | !test_bit(Replacement, &rdev->flags)) |
3001 | set_bit(WantReplacement, &rdev->flags); | |
3002 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
3003 | md_wakeup_thread(rdev->mddev->thread); | |
3004 | err = 0; | |
3005 | } else if (cmd_match(buf, "-want_replacement")) { | |
3006 | /* Clearing 'want_replacement' is always allowed. | |
3007 | * Once replacements starts it is too late though. | |
3008 | */ | |
3009 | err = 0; | |
3010 | clear_bit(WantReplacement, &rdev->flags); | |
3011 | } else if (cmd_match(buf, "replacement")) { | |
3012 | /* Can only set a device as a replacement when array has not | |
3013 | * yet been started. Once running, replacement is automatic | |
3014 | * from spares, or by assigning 'slot'. | |
3015 | */ | |
3016 | if (rdev->mddev->pers) | |
3017 | err = -EBUSY; | |
3018 | else { | |
3019 | set_bit(Replacement, &rdev->flags); | |
3020 | err = 0; | |
3021 | } | |
3022 | } else if (cmd_match(buf, "-replacement")) { | |
3023 | /* Similarly, can only clear Replacement before start */ | |
3024 | if (rdev->mddev->pers) | |
3025 | err = -EBUSY; | |
3026 | else { | |
3027 | clear_bit(Replacement, &rdev->flags); | |
3028 | err = 0; | |
3029 | } | |
a6da4ef8 | 3030 | } else if (cmd_match(buf, "re-add")) { |
ee37e621 YY |
3031 | if (!rdev->mddev->pers) |
3032 | err = -EINVAL; | |
3033 | else if (test_bit(Faulty, &rdev->flags) && (rdev->raid_disk == -1) && | |
3034 | rdev->saved_raid_disk >= 0) { | |
97f6cd39 GR |
3035 | /* clear_bit is performed _after_ all the devices |
3036 | * have their local Faulty bit cleared. If any writes | |
3037 | * happen in the meantime in the local node, they | |
3038 | * will land in the local bitmap, which will be synced | |
3039 | * by this node eventually | |
3040 | */ | |
3041 | if (!mddev_is_clustered(rdev->mddev) || | |
3042 | (err = md_cluster_ops->gather_bitmaps(rdev)) == 0) { | |
3043 | clear_bit(Faulty, &rdev->flags); | |
3044 | err = add_bound_rdev(rdev); | |
3045 | } | |
a6da4ef8 GR |
3046 | } else |
3047 | err = -EBUSY; | |
35b785f7 TM |
3048 | } else if (cmd_match(buf, "external_bbl") && (rdev->mddev->external)) { |
3049 | set_bit(ExternalBbl, &rdev->flags); | |
3050 | rdev->badblocks.shift = 0; | |
3051 | err = 0; | |
3052 | } else if (cmd_match(buf, "-external_bbl") && (rdev->mddev->external)) { | |
3053 | clear_bit(ExternalBbl, &rdev->flags); | |
3054 | err = 0; | |
45dc2de1 | 3055 | } |
8b9e2291 XN |
3056 | if (need_update_sb) |
3057 | md_update_sb(mddev, 1); | |
00bcb4ac N |
3058 | if (!err) |
3059 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
45dc2de1 N |
3060 | return err ? err : len; |
3061 | } | |
80ca3a44 | 3062 | static struct rdev_sysfs_entry rdev_state = |
750f199e | 3063 | __ATTR_PREALLOC(state, S_IRUGO|S_IWUSR, state_show, state_store); |
86e6ffdd | 3064 | |
4dbcdc75 | 3065 | static ssize_t |
3cb03002 | 3066 | errors_show(struct md_rdev *rdev, char *page) |
4dbcdc75 N |
3067 | { |
3068 | return sprintf(page, "%d\n", atomic_read(&rdev->corrected_errors)); | |
3069 | } | |
3070 | ||
3071 | static ssize_t | |
3cb03002 | 3072 | errors_store(struct md_rdev *rdev, const char *buf, size_t len) |
4dbcdc75 | 3073 | { |
4c9309c0 AD |
3074 | unsigned int n; |
3075 | int rv; | |
3076 | ||
3077 | rv = kstrtouint(buf, 10, &n); | |
3078 | if (rv < 0) | |
3079 | return rv; | |
3080 | atomic_set(&rdev->corrected_errors, n); | |
3081 | return len; | |
4dbcdc75 N |
3082 | } |
3083 | static struct rdev_sysfs_entry rdev_errors = | |
80ca3a44 | 3084 | __ATTR(errors, S_IRUGO|S_IWUSR, errors_show, errors_store); |
4dbcdc75 | 3085 | |
014236d2 | 3086 | static ssize_t |
3cb03002 | 3087 | slot_show(struct md_rdev *rdev, char *page) |
014236d2 | 3088 | { |
f2076e7d SL |
3089 | if (test_bit(Journal, &rdev->flags)) |
3090 | return sprintf(page, "journal\n"); | |
3091 | else if (rdev->raid_disk < 0) | |
014236d2 N |
3092 | return sprintf(page, "none\n"); |
3093 | else | |
3094 | return sprintf(page, "%d\n", rdev->raid_disk); | |
3095 | } | |
3096 | ||
3097 | static ssize_t | |
3cb03002 | 3098 | slot_store(struct md_rdev *rdev, const char *buf, size_t len) |
014236d2 | 3099 | { |
4c9309c0 | 3100 | int slot; |
c303da6d | 3101 | int err; |
4c9309c0 | 3102 | |
f2076e7d SL |
3103 | if (test_bit(Journal, &rdev->flags)) |
3104 | return -EBUSY; | |
014236d2 N |
3105 | if (strncmp(buf, "none", 4)==0) |
3106 | slot = -1; | |
4c9309c0 AD |
3107 | else { |
3108 | err = kstrtouint(buf, 10, (unsigned int *)&slot); | |
3109 | if (err < 0) | |
3110 | return err; | |
3bc57292 N |
3111 | if (slot < 0) |
3112 | /* overflow */ | |
3113 | return -ENOSPC; | |
4c9309c0 | 3114 | } |
6c2fce2e | 3115 | if (rdev->mddev->pers && slot == -1) { |
c303da6d N |
3116 | /* Setting 'slot' on an active array requires also |
3117 | * updating the 'rd%d' link, and communicating | |
3118 | * with the personality with ->hot_*_disk. | |
3119 | * For now we only support removing | |
3120 | * failed/spare devices. This normally happens automatically, | |
3121 | * but not when the metadata is externally managed. | |
3122 | */ | |
c303da6d N |
3123 | if (rdev->raid_disk == -1) |
3124 | return -EEXIST; | |
3125 | /* personality does all needed checks */ | |
01393f3d | 3126 | if (rdev->mddev->pers->hot_remove_disk == NULL) |
c303da6d | 3127 | return -EINVAL; |
746d3207 N |
3128 | clear_bit(Blocked, &rdev->flags); |
3129 | remove_and_add_spares(rdev->mddev, rdev); | |
3130 | if (rdev->raid_disk >= 0) | |
3131 | return -EBUSY; | |
c303da6d N |
3132 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); |
3133 | md_wakeup_thread(rdev->mddev->thread); | |
6c2fce2e | 3134 | } else if (rdev->mddev->pers) { |
6c2fce2e | 3135 | /* Activating a spare .. or possibly reactivating |
6d56e278 | 3136 | * if we ever get bitmaps working here. |
6c2fce2e | 3137 | */ |
cb01c549 | 3138 | int err; |
6c2fce2e NB |
3139 | |
3140 | if (rdev->raid_disk != -1) | |
3141 | return -EBUSY; | |
3142 | ||
c6751b2b N |
3143 | if (test_bit(MD_RECOVERY_RUNNING, &rdev->mddev->recovery)) |
3144 | return -EBUSY; | |
3145 | ||
6c2fce2e NB |
3146 | if (rdev->mddev->pers->hot_add_disk == NULL) |
3147 | return -EINVAL; | |
3148 | ||
ba1b41b6 N |
3149 | if (slot >= rdev->mddev->raid_disks && |
3150 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
3151 | return -ENOSPC; | |
3152 | ||
6c2fce2e NB |
3153 | rdev->raid_disk = slot; |
3154 | if (test_bit(In_sync, &rdev->flags)) | |
3155 | rdev->saved_raid_disk = slot; | |
3156 | else | |
3157 | rdev->saved_raid_disk = -1; | |
d30519fc | 3158 | clear_bit(In_sync, &rdev->flags); |
8313b8e5 | 3159 | clear_bit(Bitmap_sync, &rdev->flags); |
3f79cc22 | 3160 | err = rdev->mddev->pers->hot_add_disk(rdev->mddev, rdev); |
cb01c549 GR |
3161 | if (err) { |
3162 | rdev->raid_disk = -1; | |
3163 | return err; | |
3164 | } else | |
3165 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
5e3b8a8d DLM |
3166 | /* failure here is OK */; |
3167 | sysfs_link_rdev(rdev->mddev, rdev); | |
6c2fce2e | 3168 | /* don't wakeup anyone, leave that to userspace. */ |
c303da6d | 3169 | } else { |
ba1b41b6 N |
3170 | if (slot >= rdev->mddev->raid_disks && |
3171 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
c303da6d N |
3172 | return -ENOSPC; |
3173 | rdev->raid_disk = slot; | |
3174 | /* assume it is working */ | |
c5d79adb N |
3175 | clear_bit(Faulty, &rdev->flags); |
3176 | clear_bit(WriteMostly, &rdev->flags); | |
c303da6d | 3177 | set_bit(In_sync, &rdev->flags); |
00bcb4ac | 3178 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
c303da6d | 3179 | } |
014236d2 N |
3180 | return len; |
3181 | } | |
3182 | ||
014236d2 | 3183 | static struct rdev_sysfs_entry rdev_slot = |
80ca3a44 | 3184 | __ATTR(slot, S_IRUGO|S_IWUSR, slot_show, slot_store); |
014236d2 | 3185 | |
93c8cad0 | 3186 | static ssize_t |
3cb03002 | 3187 | offset_show(struct md_rdev *rdev, char *page) |
93c8cad0 | 3188 | { |
6961ece4 | 3189 | return sprintf(page, "%llu\n", (unsigned long long)rdev->data_offset); |
93c8cad0 N |
3190 | } |
3191 | ||
3192 | static ssize_t | |
3cb03002 | 3193 | offset_store(struct md_rdev *rdev, const char *buf, size_t len) |
93c8cad0 | 3194 | { |
c6563a8c | 3195 | unsigned long long offset; |
b29bebd6 | 3196 | if (kstrtoull(buf, 10, &offset) < 0) |
93c8cad0 | 3197 | return -EINVAL; |
8ed0a521 | 3198 | if (rdev->mddev->pers && rdev->raid_disk >= 0) |
93c8cad0 | 3199 | return -EBUSY; |
dd8ac336 | 3200 | if (rdev->sectors && rdev->mddev->external) |
c5d79adb N |
3201 | /* Must set offset before size, so overlap checks |
3202 | * can be sane */ | |
3203 | return -EBUSY; | |
93c8cad0 | 3204 | rdev->data_offset = offset; |
25f7fd47 | 3205 | rdev->new_data_offset = offset; |
93c8cad0 N |
3206 | return len; |
3207 | } | |
3208 | ||
3209 | static struct rdev_sysfs_entry rdev_offset = | |
80ca3a44 | 3210 | __ATTR(offset, S_IRUGO|S_IWUSR, offset_show, offset_store); |
93c8cad0 | 3211 | |
c6563a8c N |
3212 | static ssize_t new_offset_show(struct md_rdev *rdev, char *page) |
3213 | { | |
3214 | return sprintf(page, "%llu\n", | |
3215 | (unsigned long long)rdev->new_data_offset); | |
3216 | } | |
3217 | ||
3218 | static ssize_t new_offset_store(struct md_rdev *rdev, | |
3219 | const char *buf, size_t len) | |
3220 | { | |
3221 | unsigned long long new_offset; | |
3222 | struct mddev *mddev = rdev->mddev; | |
3223 | ||
b29bebd6 | 3224 | if (kstrtoull(buf, 10, &new_offset) < 0) |
c6563a8c N |
3225 | return -EINVAL; |
3226 | ||
f851b60d N |
3227 | if (mddev->sync_thread || |
3228 | test_bit(MD_RECOVERY_RUNNING,&mddev->recovery)) | |
c6563a8c N |
3229 | return -EBUSY; |
3230 | if (new_offset == rdev->data_offset) | |
3231 | /* reset is always permitted */ | |
3232 | ; | |
3233 | else if (new_offset > rdev->data_offset) { | |
3234 | /* must not push array size beyond rdev_sectors */ | |
3235 | if (new_offset - rdev->data_offset | |
3236 | + mddev->dev_sectors > rdev->sectors) | |
3237 | return -E2BIG; | |
3238 | } | |
3239 | /* Metadata worries about other space details. */ | |
3240 | ||
3241 | /* decreasing the offset is inconsistent with a backwards | |
3242 | * reshape. | |
3243 | */ | |
3244 | if (new_offset < rdev->data_offset && | |
3245 | mddev->reshape_backwards) | |
3246 | return -EINVAL; | |
3247 | /* Increasing offset is inconsistent with forwards | |
3248 | * reshape. reshape_direction should be set to | |
3249 | * 'backwards' first. | |
3250 | */ | |
3251 | if (new_offset > rdev->data_offset && | |
3252 | !mddev->reshape_backwards) | |
3253 | return -EINVAL; | |
3254 | ||
3255 | if (mddev->pers && mddev->persistent && | |
3256 | !super_types[mddev->major_version] | |
3257 | .allow_new_offset(rdev, new_offset)) | |
3258 | return -E2BIG; | |
3259 | rdev->new_data_offset = new_offset; | |
3260 | if (new_offset > rdev->data_offset) | |
3261 | mddev->reshape_backwards = 1; | |
3262 | else if (new_offset < rdev->data_offset) | |
3263 | mddev->reshape_backwards = 0; | |
3264 | ||
3265 | return len; | |
3266 | } | |
3267 | static struct rdev_sysfs_entry rdev_new_offset = | |
3268 | __ATTR(new_offset, S_IRUGO|S_IWUSR, new_offset_show, new_offset_store); | |
3269 | ||
83303b61 | 3270 | static ssize_t |
3cb03002 | 3271 | rdev_size_show(struct md_rdev *rdev, char *page) |
83303b61 | 3272 | { |
dd8ac336 | 3273 | return sprintf(page, "%llu\n", (unsigned long long)rdev->sectors / 2); |
83303b61 N |
3274 | } |
3275 | ||
2652a1bd | 3276 | static int md_rdevs_overlap(struct md_rdev *a, struct md_rdev *b) |
c5d79adb N |
3277 | { |
3278 | /* check if two start/length pairs overlap */ | |
2652a1bd CH |
3279 | if (a->data_offset + a->sectors <= b->data_offset) |
3280 | return false; | |
3281 | if (b->data_offset + b->sectors <= a->data_offset) | |
3282 | return false; | |
3283 | return true; | |
3284 | } | |
3285 | ||
3286 | static bool md_rdev_overlaps(struct md_rdev *rdev) | |
3287 | { | |
3288 | struct mddev *mddev; | |
3289 | struct md_rdev *rdev2; | |
3290 | ||
3291 | spin_lock(&all_mddevs_lock); | |
3292 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) { | |
12a6caf2 CH |
3293 | if (test_bit(MD_DELETED, &mddev->flags)) |
3294 | continue; | |
2652a1bd CH |
3295 | rdev_for_each(rdev2, mddev) { |
3296 | if (rdev != rdev2 && rdev->bdev == rdev2->bdev && | |
3297 | md_rdevs_overlap(rdev, rdev2)) { | |
3298 | spin_unlock(&all_mddevs_lock); | |
3299 | return true; | |
3300 | } | |
3301 | } | |
3302 | } | |
3303 | spin_unlock(&all_mddevs_lock); | |
3304 | return false; | |
c5d79adb N |
3305 | } |
3306 | ||
b522adcd DW |
3307 | static int strict_blocks_to_sectors(const char *buf, sector_t *sectors) |
3308 | { | |
3309 | unsigned long long blocks; | |
3310 | sector_t new; | |
3311 | ||
b29bebd6 | 3312 | if (kstrtoull(buf, 10, &blocks) < 0) |
b522adcd DW |
3313 | return -EINVAL; |
3314 | ||
3315 | if (blocks & 1ULL << (8 * sizeof(blocks) - 1)) | |
3316 | return -EINVAL; /* sector conversion overflow */ | |
3317 | ||
3318 | new = blocks * 2; | |
3319 | if (new != blocks * 2) | |
3320 | return -EINVAL; /* unsigned long long to sector_t overflow */ | |
3321 | ||
3322 | *sectors = new; | |
3323 | return 0; | |
3324 | } | |
3325 | ||
83303b61 | 3326 | static ssize_t |
3cb03002 | 3327 | rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len) |
83303b61 | 3328 | { |
fd01b88c | 3329 | struct mddev *my_mddev = rdev->mddev; |
dd8ac336 | 3330 | sector_t oldsectors = rdev->sectors; |
b522adcd | 3331 | sector_t sectors; |
27c529bb | 3332 | |
f2076e7d SL |
3333 | if (test_bit(Journal, &rdev->flags)) |
3334 | return -EBUSY; | |
b522adcd | 3335 | if (strict_blocks_to_sectors(buf, §ors) < 0) |
d7027458 | 3336 | return -EINVAL; |
c6563a8c N |
3337 | if (rdev->data_offset != rdev->new_data_offset) |
3338 | return -EINVAL; /* too confusing */ | |
0cd17fec | 3339 | if (my_mddev->pers && rdev->raid_disk >= 0) { |
d7027458 | 3340 | if (my_mddev->persistent) { |
dd8ac336 AN |
3341 | sectors = super_types[my_mddev->major_version]. |
3342 | rdev_size_change(rdev, sectors); | |
3343 | if (!sectors) | |
0cd17fec | 3344 | return -EBUSY; |
dd8ac336 | 3345 | } else if (!sectors) |
0fe80347 | 3346 | sectors = bdev_nr_sectors(rdev->bdev) - |
dd8ac336 | 3347 | rdev->data_offset; |
a6468539 N |
3348 | if (!my_mddev->pers->resize) |
3349 | /* Cannot change size for RAID0 or Linear etc */ | |
3350 | return -EINVAL; | |
0cd17fec | 3351 | } |
dd8ac336 | 3352 | if (sectors < my_mddev->dev_sectors) |
7d3c6f87 | 3353 | return -EINVAL; /* component must fit device */ |
0cd17fec | 3354 | |
dd8ac336 | 3355 | rdev->sectors = sectors; |
2652a1bd CH |
3356 | |
3357 | /* | |
3358 | * Check that all other rdevs with the same bdev do not overlap. This | |
3359 | * check does not provide a hard guarantee, it just helps avoid | |
3360 | * dangerous mistakes. | |
3361 | */ | |
3362 | if (sectors > oldsectors && my_mddev->external && | |
3363 | md_rdev_overlaps(rdev)) { | |
3364 | /* | |
3365 | * Someone else could have slipped in a size change here, but | |
3366 | * doing so is just silly. We put oldsectors back because we | |
3367 | * know it is safe, and trust userspace not to race with itself. | |
c5d79adb | 3368 | */ |
2652a1bd CH |
3369 | rdev->sectors = oldsectors; |
3370 | return -EBUSY; | |
c5d79adb | 3371 | } |
83303b61 N |
3372 | return len; |
3373 | } | |
3374 | ||
3375 | static struct rdev_sysfs_entry rdev_size = | |
80ca3a44 | 3376 | __ATTR(size, S_IRUGO|S_IWUSR, rdev_size_show, rdev_size_store); |
83303b61 | 3377 | |
3cb03002 | 3378 | static ssize_t recovery_start_show(struct md_rdev *rdev, char *page) |
06e3c817 DW |
3379 | { |
3380 | unsigned long long recovery_start = rdev->recovery_offset; | |
3381 | ||
3382 | if (test_bit(In_sync, &rdev->flags) || | |
3383 | recovery_start == MaxSector) | |
3384 | return sprintf(page, "none\n"); | |
3385 | ||
3386 | return sprintf(page, "%llu\n", recovery_start); | |
3387 | } | |
3388 | ||
3cb03002 | 3389 | static ssize_t recovery_start_store(struct md_rdev *rdev, const char *buf, size_t len) |
06e3c817 DW |
3390 | { |
3391 | unsigned long long recovery_start; | |
3392 | ||
3393 | if (cmd_match(buf, "none")) | |
3394 | recovery_start = MaxSector; | |
b29bebd6 | 3395 | else if (kstrtoull(buf, 10, &recovery_start)) |
06e3c817 DW |
3396 | return -EINVAL; |
3397 | ||
3398 | if (rdev->mddev->pers && | |
3399 | rdev->raid_disk >= 0) | |
3400 | return -EBUSY; | |
3401 | ||
3402 | rdev->recovery_offset = recovery_start; | |
3403 | if (recovery_start == MaxSector) | |
3404 | set_bit(In_sync, &rdev->flags); | |
3405 | else | |
3406 | clear_bit(In_sync, &rdev->flags); | |
3407 | return len; | |
3408 | } | |
3409 | ||
3410 | static struct rdev_sysfs_entry rdev_recovery_start = | |
3411 | __ATTR(recovery_start, S_IRUGO|S_IWUSR, recovery_start_show, recovery_start_store); | |
3412 | ||
fc974ee2 VV |
3413 | /* sysfs access to bad-blocks list. |
3414 | * We present two files. | |
3415 | * 'bad-blocks' lists sector numbers and lengths of ranges that | |
3416 | * are recorded as bad. The list is truncated to fit within | |
3417 | * the one-page limit of sysfs. | |
3418 | * Writing "sector length" to this file adds an acknowledged | |
3419 | * bad block list. | |
3420 | * 'unacknowledged-bad-blocks' lists bad blocks that have not yet | |
3421 | * been acknowledged. Writing to this file adds bad blocks | |
3422 | * without acknowledging them. This is largely for testing. | |
3423 | */ | |
3cb03002 | 3424 | static ssize_t bb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3425 | { |
3426 | return badblocks_show(&rdev->badblocks, page, 0); | |
3427 | } | |
3cb03002 | 3428 | static ssize_t bb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 | 3429 | { |
de393cde N |
3430 | int rv = badblocks_store(&rdev->badblocks, page, len, 0); |
3431 | /* Maybe that ack was all we needed */ | |
3432 | if (test_and_clear_bit(BlockedBadBlocks, &rdev->flags)) | |
3433 | wake_up(&rdev->blocked_wait); | |
3434 | return rv; | |
16c791a5 N |
3435 | } |
3436 | static struct rdev_sysfs_entry rdev_bad_blocks = | |
3437 | __ATTR(bad_blocks, S_IRUGO|S_IWUSR, bb_show, bb_store); | |
3438 | ||
3cb03002 | 3439 | static ssize_t ubb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3440 | { |
3441 | return badblocks_show(&rdev->badblocks, page, 1); | |
3442 | } | |
3cb03002 | 3443 | static ssize_t ubb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 N |
3444 | { |
3445 | return badblocks_store(&rdev->badblocks, page, len, 1); | |
3446 | } | |
3447 | static struct rdev_sysfs_entry rdev_unack_bad_blocks = | |
3448 | __ATTR(unacknowledged_bad_blocks, S_IRUGO|S_IWUSR, ubb_show, ubb_store); | |
3449 | ||
664aed04 AP |
3450 | static ssize_t |
3451 | ppl_sector_show(struct md_rdev *rdev, char *page) | |
3452 | { | |
3453 | return sprintf(page, "%llu\n", (unsigned long long)rdev->ppl.sector); | |
3454 | } | |
3455 | ||
3456 | static ssize_t | |
3457 | ppl_sector_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3458 | { | |
3459 | unsigned long long sector; | |
3460 | ||
3461 | if (kstrtoull(buf, 10, §or) < 0) | |
3462 | return -EINVAL; | |
3463 | if (sector != (sector_t)sector) | |
3464 | return -EINVAL; | |
3465 | ||
3466 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3467 | rdev->raid_disk >= 0) | |
3468 | return -EBUSY; | |
3469 | ||
3470 | if (rdev->mddev->persistent) { | |
3471 | if (rdev->mddev->major_version == 0) | |
3472 | return -EINVAL; | |
3473 | if ((sector > rdev->sb_start && | |
3474 | sector - rdev->sb_start > S16_MAX) || | |
3475 | (sector < rdev->sb_start && | |
3476 | rdev->sb_start - sector > -S16_MIN)) | |
3477 | return -EINVAL; | |
3478 | rdev->ppl.offset = sector - rdev->sb_start; | |
3479 | } else if (!rdev->mddev->external) { | |
3480 | return -EBUSY; | |
3481 | } | |
3482 | rdev->ppl.sector = sector; | |
3483 | return len; | |
3484 | } | |
3485 | ||
3486 | static struct rdev_sysfs_entry rdev_ppl_sector = | |
3487 | __ATTR(ppl_sector, S_IRUGO|S_IWUSR, ppl_sector_show, ppl_sector_store); | |
3488 | ||
3489 | static ssize_t | |
3490 | ppl_size_show(struct md_rdev *rdev, char *page) | |
3491 | { | |
3492 | return sprintf(page, "%u\n", rdev->ppl.size); | |
3493 | } | |
3494 | ||
3495 | static ssize_t | |
3496 | ppl_size_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3497 | { | |
3498 | unsigned int size; | |
3499 | ||
3500 | if (kstrtouint(buf, 10, &size) < 0) | |
3501 | return -EINVAL; | |
3502 | ||
3503 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3504 | rdev->raid_disk >= 0) | |
3505 | return -EBUSY; | |
3506 | ||
3507 | if (rdev->mddev->persistent) { | |
3508 | if (rdev->mddev->major_version == 0) | |
3509 | return -EINVAL; | |
3510 | if (size > U16_MAX) | |
3511 | return -EINVAL; | |
3512 | } else if (!rdev->mddev->external) { | |
3513 | return -EBUSY; | |
3514 | } | |
3515 | rdev->ppl.size = size; | |
3516 | return len; | |
3517 | } | |
3518 | ||
3519 | static struct rdev_sysfs_entry rdev_ppl_size = | |
3520 | __ATTR(ppl_size, S_IRUGO|S_IWUSR, ppl_size_show, ppl_size_store); | |
3521 | ||
86e6ffdd N |
3522 | static struct attribute *rdev_default_attrs[] = { |
3523 | &rdev_state.attr, | |
4dbcdc75 | 3524 | &rdev_errors.attr, |
014236d2 | 3525 | &rdev_slot.attr, |
93c8cad0 | 3526 | &rdev_offset.attr, |
c6563a8c | 3527 | &rdev_new_offset.attr, |
83303b61 | 3528 | &rdev_size.attr, |
06e3c817 | 3529 | &rdev_recovery_start.attr, |
16c791a5 N |
3530 | &rdev_bad_blocks.attr, |
3531 | &rdev_unack_bad_blocks.attr, | |
664aed04 AP |
3532 | &rdev_ppl_sector.attr, |
3533 | &rdev_ppl_size.attr, | |
86e6ffdd N |
3534 | NULL, |
3535 | }; | |
1745e857 | 3536 | ATTRIBUTE_GROUPS(rdev_default); |
86e6ffdd N |
3537 | static ssize_t |
3538 | rdev_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
3539 | { | |
3540 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3541 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
86e6ffdd N |
3542 | |
3543 | if (!entry->show) | |
3544 | return -EIO; | |
758bfc8a | 3545 | if (!rdev->mddev) |
168b305b | 3546 | return -ENODEV; |
758bfc8a | 3547 | return entry->show(rdev, page); |
86e6ffdd N |
3548 | } |
3549 | ||
3550 | static ssize_t | |
3551 | rdev_attr_store(struct kobject *kobj, struct attribute *attr, | |
3552 | const char *page, size_t length) | |
3553 | { | |
3554 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3555 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
27c529bb | 3556 | ssize_t rv; |
fd01b88c | 3557 | struct mddev *mddev = rdev->mddev; |
86e6ffdd N |
3558 | |
3559 | if (!entry->store) | |
3560 | return -EIO; | |
67463acb N |
3561 | if (!capable(CAP_SYS_ADMIN)) |
3562 | return -EACCES; | |
c42d3240 | 3563 | rv = mddev ? mddev_lock(mddev) : -ENODEV; |
ca388059 | 3564 | if (!rv) { |
27c529bb | 3565 | if (rdev->mddev == NULL) |
c42d3240 | 3566 | rv = -ENODEV; |
27c529bb N |
3567 | else |
3568 | rv = entry->store(rdev, page, length); | |
6a51830e | 3569 | mddev_unlock(mddev); |
ca388059 N |
3570 | } |
3571 | return rv; | |
86e6ffdd N |
3572 | } |
3573 | ||
3574 | static void rdev_free(struct kobject *ko) | |
3575 | { | |
3cb03002 | 3576 | struct md_rdev *rdev = container_of(ko, struct md_rdev, kobj); |
86e6ffdd N |
3577 | kfree(rdev); |
3578 | } | |
52cf25d0 | 3579 | static const struct sysfs_ops rdev_sysfs_ops = { |
86e6ffdd N |
3580 | .show = rdev_attr_show, |
3581 | .store = rdev_attr_store, | |
3582 | }; | |
4d72a9de | 3583 | static const struct kobj_type rdev_ktype = { |
86e6ffdd N |
3584 | .release = rdev_free, |
3585 | .sysfs_ops = &rdev_sysfs_ops, | |
1745e857 | 3586 | .default_groups = rdev_default_groups, |
86e6ffdd N |
3587 | }; |
3588 | ||
3cb03002 | 3589 | int md_rdev_init(struct md_rdev *rdev) |
e8bb9a83 N |
3590 | { |
3591 | rdev->desc_nr = -1; | |
3592 | rdev->saved_raid_disk = -1; | |
3593 | rdev->raid_disk = -1; | |
3594 | rdev->flags = 0; | |
3595 | rdev->data_offset = 0; | |
c6563a8c | 3596 | rdev->new_data_offset = 0; |
e8bb9a83 | 3597 | rdev->sb_events = 0; |
0e3ef49e | 3598 | rdev->last_read_error = 0; |
2699b672 N |
3599 | rdev->sb_loaded = 0; |
3600 | rdev->bb_page = NULL; | |
e8bb9a83 N |
3601 | atomic_set(&rdev->nr_pending, 0); |
3602 | atomic_set(&rdev->read_errors, 0); | |
3603 | atomic_set(&rdev->corrected_errors, 0); | |
3604 | ||
3605 | INIT_LIST_HEAD(&rdev->same_set); | |
3606 | init_waitqueue_head(&rdev->blocked_wait); | |
2230dfe4 N |
3607 | |
3608 | /* Add space to store bad block list. | |
3609 | * This reserves the space even on arrays where it cannot | |
3610 | * be used - I wonder if that matters | |
3611 | */ | |
fc974ee2 | 3612 | return badblocks_init(&rdev->badblocks, 0); |
e8bb9a83 N |
3613 | } |
3614 | EXPORT_SYMBOL_GPL(md_rdev_init); | |
1da177e4 LT |
3615 | /* |
3616 | * Import a device. If 'super_format' >= 0, then sanity check the superblock | |
3617 | * | |
3618 | * mark the device faulty if: | |
3619 | * | |
3620 | * - the device is nonexistent (zero size) | |
3621 | * - the device has no valid superblock | |
3622 | * | |
3623 | * a faulty rdev _never_ has rdev->sb set. | |
3624 | */ | |
3cb03002 | 3625 | static struct md_rdev *md_import_device(dev_t newdev, int super_format, int super_minor) |
1da177e4 | 3626 | { |
b0907cad | 3627 | static struct md_rdev claim_rdev; /* just for claiming the bdev */ |
3cb03002 | 3628 | struct md_rdev *rdev; |
1da177e4 | 3629 | sector_t size; |
fb541ca4 | 3630 | int err; |
1da177e4 | 3631 | |
9ffae0cf | 3632 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
9d48739e | 3633 | if (!rdev) |
1da177e4 | 3634 | return ERR_PTR(-ENOMEM); |
1da177e4 | 3635 | |
2230dfe4 N |
3636 | err = md_rdev_init(rdev); |
3637 | if (err) | |
fb541ca4 | 3638 | goto out_free_rdev; |
2230dfe4 N |
3639 | err = alloc_disk_sb(rdev); |
3640 | if (err) | |
fb541ca4 | 3641 | goto out_clear_rdev; |
1da177e4 | 3642 | |
fb541ca4 CH |
3643 | rdev->bdev = blkdev_get_by_dev(newdev, |
3644 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, | |
b0907cad | 3645 | super_format == -2 ? &claim_rdev : rdev); |
fb541ca4 CH |
3646 | if (IS_ERR(rdev->bdev)) { |
3647 | pr_warn("md: could not open device unknown-block(%u,%u).\n", | |
3648 | MAJOR(newdev), MINOR(newdev)); | |
3649 | err = PTR_ERR(rdev->bdev); | |
3650 | goto out_clear_rdev; | |
3651 | } | |
1da177e4 | 3652 | |
f9cb074b | 3653 | kobject_init(&rdev->kobj, &rdev_ktype); |
86e6ffdd | 3654 | |
0fe80347 | 3655 | size = bdev_nr_bytes(rdev->bdev) >> BLOCK_SIZE_BITS; |
1da177e4 | 3656 | if (!size) { |
913cce5a CH |
3657 | pr_warn("md: %pg has zero or unknown size, marking faulty!\n", |
3658 | rdev->bdev); | |
1da177e4 | 3659 | err = -EINVAL; |
fb541ca4 | 3660 | goto out_blkdev_put; |
1da177e4 LT |
3661 | } |
3662 | ||
3663 | if (super_format >= 0) { | |
3664 | err = super_types[super_format]. | |
3665 | load_super(rdev, NULL, super_minor); | |
3666 | if (err == -EINVAL) { | |
913cce5a CH |
3667 | pr_warn("md: %pg does not have a valid v%d.%d superblock, not importing!\n", |
3668 | rdev->bdev, | |
9d48739e | 3669 | super_format, super_minor); |
fb541ca4 | 3670 | goto out_blkdev_put; |
1da177e4 LT |
3671 | } |
3672 | if (err < 0) { | |
913cce5a CH |
3673 | pr_warn("md: could not read %pg's sb, not importing!\n", |
3674 | rdev->bdev); | |
fb541ca4 | 3675 | goto out_blkdev_put; |
1da177e4 LT |
3676 | } |
3677 | } | |
6bfe0b49 | 3678 | |
1da177e4 LT |
3679 | return rdev; |
3680 | ||
fb541ca4 CH |
3681 | out_blkdev_put: |
3682 | blkdev_put(rdev->bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
3683 | out_clear_rdev: | |
545c8795 | 3684 | md_rdev_clear(rdev); |
fb541ca4 | 3685 | out_free_rdev: |
1da177e4 LT |
3686 | kfree(rdev); |
3687 | return ERR_PTR(err); | |
3688 | } | |
3689 | ||
3690 | /* | |
3691 | * Check a full RAID array for plausibility | |
3692 | */ | |
3693 | ||
6a5cb53a | 3694 | static int analyze_sbs(struct mddev *mddev) |
1da177e4 LT |
3695 | { |
3696 | int i; | |
3cb03002 | 3697 | struct md_rdev *rdev, *freshest, *tmp; |
1da177e4 LT |
3698 | |
3699 | freshest = NULL; | |
dafb20fa | 3700 | rdev_for_each_safe(rdev, tmp, mddev) |
1da177e4 LT |
3701 | switch (super_types[mddev->major_version]. |
3702 | load_super(rdev, freshest, mddev->minor_version)) { | |
3703 | case 1: | |
3704 | freshest = rdev; | |
3705 | break; | |
3706 | case 0: | |
3707 | break; | |
3708 | default: | |
913cce5a CH |
3709 | pr_warn("md: fatal superblock inconsistency in %pg -- removing from array\n", |
3710 | rdev->bdev); | |
fb56dfef | 3711 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3712 | } |
3713 | ||
6a5cb53a YY |
3714 | /* Cannot find a valid fresh disk */ |
3715 | if (!freshest) { | |
3716 | pr_warn("md: cannot find a valid disk\n"); | |
3717 | return -EINVAL; | |
3718 | } | |
3719 | ||
1da177e4 LT |
3720 | super_types[mddev->major_version]. |
3721 | validate_super(mddev, freshest); | |
3722 | ||
3723 | i = 0; | |
dafb20fa | 3724 | rdev_for_each_safe(rdev, tmp, mddev) { |
233fca36 N |
3725 | if (mddev->max_disks && |
3726 | (rdev->desc_nr >= mddev->max_disks || | |
3727 | i > mddev->max_disks)) { | |
913cce5a CH |
3728 | pr_warn("md: %s: %pg: only %d devices permitted\n", |
3729 | mdname(mddev), rdev->bdev, | |
9d48739e | 3730 | mddev->max_disks); |
fb56dfef | 3731 | md_kick_rdev_from_array(rdev); |
de01dfad N |
3732 | continue; |
3733 | } | |
1aee41f6 | 3734 | if (rdev != freshest) { |
1da177e4 LT |
3735 | if (super_types[mddev->major_version]. |
3736 | validate_super(mddev, rdev)) { | |
913cce5a CH |
3737 | pr_warn("md: kicking non-fresh %pg from array!\n", |
3738 | rdev->bdev); | |
fb56dfef | 3739 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3740 | continue; |
3741 | } | |
1aee41f6 | 3742 | } |
1da177e4 LT |
3743 | if (mddev->level == LEVEL_MULTIPATH) { |
3744 | rdev->desc_nr = i++; | |
3745 | rdev->raid_disk = rdev->desc_nr; | |
b2d444d7 | 3746 | set_bit(In_sync, &rdev->flags); |
f2076e7d SL |
3747 | } else if (rdev->raid_disk >= |
3748 | (mddev->raid_disks - min(0, mddev->delta_disks)) && | |
3749 | !test_bit(Journal, &rdev->flags)) { | |
a778b73f N |
3750 | rdev->raid_disk = -1; |
3751 | clear_bit(In_sync, &rdev->flags); | |
1da177e4 LT |
3752 | } |
3753 | } | |
6a5cb53a YY |
3754 | |
3755 | return 0; | |
1da177e4 LT |
3756 | } |
3757 | ||
72e02075 N |
3758 | /* Read a fixed-point number. |
3759 | * Numbers in sysfs attributes should be in "standard" units where | |
3760 | * possible, so time should be in seconds. | |
f72ffdd6 | 3761 | * However we internally use a a much smaller unit such as |
72e02075 N |
3762 | * milliseconds or jiffies. |
3763 | * This function takes a decimal number with a possible fractional | |
3764 | * component, and produces an integer which is the result of | |
3765 | * multiplying that number by 10^'scale'. | |
3766 | * all without any floating-point arithmetic. | |
3767 | */ | |
3768 | int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale) | |
3769 | { | |
3770 | unsigned long result = 0; | |
3771 | long decimals = -1; | |
3772 | while (isdigit(*cp) || (*cp == '.' && decimals < 0)) { | |
3773 | if (*cp == '.') | |
3774 | decimals = 0; | |
3775 | else if (decimals < scale) { | |
3776 | unsigned int value; | |
3777 | value = *cp - '0'; | |
3778 | result = result * 10 + value; | |
3779 | if (decimals >= 0) | |
3780 | decimals++; | |
3781 | } | |
3782 | cp++; | |
3783 | } | |
3784 | if (*cp == '\n') | |
3785 | cp++; | |
3786 | if (*cp) | |
3787 | return -EINVAL; | |
3788 | if (decimals < 0) | |
3789 | decimals = 0; | |
cf891607 | 3790 | *res = result * int_pow(10, scale - decimals); |
72e02075 N |
3791 | return 0; |
3792 | } | |
3793 | ||
16f17b39 | 3794 | static ssize_t |
fd01b88c | 3795 | safe_delay_show(struct mddev *mddev, char *page) |
16f17b39 N |
3796 | { |
3797 | int msec = (mddev->safemode_delay*1000)/HZ; | |
3798 | return sprintf(page, "%d.%03d\n", msec/1000, msec%1000); | |
3799 | } | |
3800 | static ssize_t | |
fd01b88c | 3801 | safe_delay_store(struct mddev *mddev, const char *cbuf, size_t len) |
16f17b39 | 3802 | { |
16f17b39 | 3803 | unsigned long msec; |
97ce0a7f | 3804 | |
28c1b9fd | 3805 | if (mddev_is_clustered(mddev)) { |
9d48739e | 3806 | pr_warn("md: Safemode is disabled for clustered mode\n"); |
28c1b9fd GR |
3807 | return -EINVAL; |
3808 | } | |
3809 | ||
72e02075 | 3810 | if (strict_strtoul_scaled(cbuf, &msec, 3) < 0) |
16f17b39 | 3811 | return -EINVAL; |
16f17b39 N |
3812 | if (msec == 0) |
3813 | mddev->safemode_delay = 0; | |
3814 | else { | |
19052c0e | 3815 | unsigned long old_delay = mddev->safemode_delay; |
1b30e66f N |
3816 | unsigned long new_delay = (msec*HZ)/1000; |
3817 | ||
3818 | if (new_delay == 0) | |
3819 | new_delay = 1; | |
3820 | mddev->safemode_delay = new_delay; | |
3821 | if (new_delay < old_delay || old_delay == 0) | |
3822 | mod_timer(&mddev->safemode_timer, jiffies+1); | |
16f17b39 N |
3823 | } |
3824 | return len; | |
3825 | } | |
3826 | static struct md_sysfs_entry md_safe_delay = | |
80ca3a44 | 3827 | __ATTR(safe_mode_delay, S_IRUGO|S_IWUSR,safe_delay_show, safe_delay_store); |
16f17b39 | 3828 | |
eae1701f | 3829 | static ssize_t |
fd01b88c | 3830 | level_show(struct mddev *mddev, char *page) |
eae1701f | 3831 | { |
36d091f4 N |
3832 | struct md_personality *p; |
3833 | int ret; | |
3834 | spin_lock(&mddev->lock); | |
3835 | p = mddev->pers; | |
d9d166c2 | 3836 | if (p) |
36d091f4 | 3837 | ret = sprintf(page, "%s\n", p->name); |
d9d166c2 | 3838 | else if (mddev->clevel[0]) |
36d091f4 | 3839 | ret = sprintf(page, "%s\n", mddev->clevel); |
d9d166c2 | 3840 | else if (mddev->level != LEVEL_NONE) |
36d091f4 | 3841 | ret = sprintf(page, "%d\n", mddev->level); |
d9d166c2 | 3842 | else |
36d091f4 N |
3843 | ret = 0; |
3844 | spin_unlock(&mddev->lock); | |
3845 | return ret; | |
eae1701f N |
3846 | } |
3847 | ||
d9d166c2 | 3848 | static ssize_t |
fd01b88c | 3849 | level_store(struct mddev *mddev, const char *buf, size_t len) |
d9d166c2 | 3850 | { |
f2859af6 | 3851 | char clevel[16]; |
6791875e N |
3852 | ssize_t rv; |
3853 | size_t slen = len; | |
db721d32 | 3854 | struct md_personality *pers, *oldpers; |
f2859af6 | 3855 | long level; |
db721d32 | 3856 | void *priv, *oldpriv; |
3cb03002 | 3857 | struct md_rdev *rdev; |
245f46c2 | 3858 | |
6791875e N |
3859 | if (slen == 0 || slen >= sizeof(clevel)) |
3860 | return -EINVAL; | |
3861 | ||
3862 | rv = mddev_lock(mddev); | |
3863 | if (rv) | |
3864 | return rv; | |
3865 | ||
245f46c2 | 3866 | if (mddev->pers == NULL) { |
6791875e N |
3867 | strncpy(mddev->clevel, buf, slen); |
3868 | if (mddev->clevel[slen-1] == '\n') | |
3869 | slen--; | |
3870 | mddev->clevel[slen] = 0; | |
245f46c2 | 3871 | mddev->level = LEVEL_NONE; |
6791875e N |
3872 | rv = len; |
3873 | goto out_unlock; | |
245f46c2 | 3874 | } |
6791875e | 3875 | rv = -EROFS; |
f97a5528 | 3876 | if (!md_is_rdwr(mddev)) |
6791875e | 3877 | goto out_unlock; |
245f46c2 N |
3878 | |
3879 | /* request to change the personality. Need to ensure: | |
3880 | * - array is not engaged in resync/recovery/reshape | |
3881 | * - old personality can be suspended | |
3882 | * - new personality will access other array. | |
3883 | */ | |
3884 | ||
6791875e | 3885 | rv = -EBUSY; |
bb4f1e9d | 3886 | if (mddev->sync_thread || |
f851b60d | 3887 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
bb4f1e9d N |
3888 | mddev->reshape_position != MaxSector || |
3889 | mddev->sysfs_active) | |
6791875e | 3890 | goto out_unlock; |
245f46c2 | 3891 | |
6791875e | 3892 | rv = -EINVAL; |
245f46c2 | 3893 | if (!mddev->pers->quiesce) { |
9d48739e N |
3894 | pr_warn("md: %s: %s does not support online personality change\n", |
3895 | mdname(mddev), mddev->pers->name); | |
6791875e | 3896 | goto out_unlock; |
245f46c2 N |
3897 | } |
3898 | ||
3899 | /* Now find the new personality */ | |
6791875e N |
3900 | strncpy(clevel, buf, slen); |
3901 | if (clevel[slen-1] == '\n') | |
3902 | slen--; | |
3903 | clevel[slen] = 0; | |
b29bebd6 | 3904 | if (kstrtol(clevel, 10, &level)) |
f2859af6 | 3905 | level = LEVEL_NONE; |
245f46c2 | 3906 | |
f2859af6 DW |
3907 | if (request_module("md-%s", clevel) != 0) |
3908 | request_module("md-level-%s", clevel); | |
245f46c2 | 3909 | spin_lock(&pers_lock); |
f2859af6 | 3910 | pers = find_pers(level, clevel); |
245f46c2 N |
3911 | if (!pers || !try_module_get(pers->owner)) { |
3912 | spin_unlock(&pers_lock); | |
9d48739e | 3913 | pr_warn("md: personality %s not loaded\n", clevel); |
6791875e N |
3914 | rv = -EINVAL; |
3915 | goto out_unlock; | |
245f46c2 N |
3916 | } |
3917 | spin_unlock(&pers_lock); | |
3918 | ||
3919 | if (pers == mddev->pers) { | |
3920 | /* Nothing to do! */ | |
3921 | module_put(pers->owner); | |
6791875e N |
3922 | rv = len; |
3923 | goto out_unlock; | |
245f46c2 N |
3924 | } |
3925 | if (!pers->takeover) { | |
3926 | module_put(pers->owner); | |
9d48739e N |
3927 | pr_warn("md: %s: %s does not support personality takeover\n", |
3928 | mdname(mddev), clevel); | |
6791875e N |
3929 | rv = -EINVAL; |
3930 | goto out_unlock; | |
245f46c2 N |
3931 | } |
3932 | ||
dafb20fa | 3933 | rdev_for_each(rdev, mddev) |
e93f68a1 N |
3934 | rdev->new_raid_disk = rdev->raid_disk; |
3935 | ||
245f46c2 N |
3936 | /* ->takeover must set new_* and/or delta_disks |
3937 | * if it succeeds, and may set them when it fails. | |
3938 | */ | |
3939 | priv = pers->takeover(mddev); | |
3940 | if (IS_ERR(priv)) { | |
3941 | mddev->new_level = mddev->level; | |
3942 | mddev->new_layout = mddev->layout; | |
664e7c41 | 3943 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
245f46c2 N |
3944 | mddev->raid_disks -= mddev->delta_disks; |
3945 | mddev->delta_disks = 0; | |
2c810cdd | 3946 | mddev->reshape_backwards = 0; |
245f46c2 | 3947 | module_put(pers->owner); |
9d48739e N |
3948 | pr_warn("md: %s: %s would not accept array\n", |
3949 | mdname(mddev), clevel); | |
6791875e N |
3950 | rv = PTR_ERR(priv); |
3951 | goto out_unlock; | |
245f46c2 N |
3952 | } |
3953 | ||
3954 | /* Looks like we have a winner */ | |
3955 | mddev_suspend(mddev); | |
5aa61f42 | 3956 | mddev_detach(mddev); |
36d091f4 N |
3957 | |
3958 | spin_lock(&mddev->lock); | |
db721d32 N |
3959 | oldpers = mddev->pers; |
3960 | oldpriv = mddev->private; | |
3961 | mddev->pers = pers; | |
3962 | mddev->private = priv; | |
92d9aac9 | 3963 | strscpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
db721d32 N |
3964 | mddev->level = mddev->new_level; |
3965 | mddev->layout = mddev->new_layout; | |
3966 | mddev->chunk_sectors = mddev->new_chunk_sectors; | |
3967 | mddev->delta_disks = 0; | |
3968 | mddev->reshape_backwards = 0; | |
3969 | mddev->degraded = 0; | |
36d091f4 | 3970 | spin_unlock(&mddev->lock); |
db721d32 N |
3971 | |
3972 | if (oldpers->sync_request == NULL && | |
3973 | mddev->external) { | |
3974 | /* We are converting from a no-redundancy array | |
3975 | * to a redundancy array and metadata is managed | |
3976 | * externally so we need to be sure that writes | |
3977 | * won't block due to a need to transition | |
3978 | * clean->dirty | |
3979 | * until external management is started. | |
3980 | */ | |
3981 | mddev->in_sync = 0; | |
3982 | mddev->safemode_delay = 0; | |
3983 | mddev->safemode = 0; | |
3984 | } | |
f72ffdd6 | 3985 | |
db721d32 N |
3986 | oldpers->free(mddev, oldpriv); |
3987 | ||
3988 | if (oldpers->sync_request == NULL && | |
a64c876f N |
3989 | pers->sync_request != NULL) { |
3990 | /* need to add the md_redundancy_group */ | |
3991 | if (sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
3992 | pr_warn("md: cannot register extra attributes for %s\n", |
3993 | mdname(mddev)); | |
388975cc | 3994 | mddev->sysfs_action = sysfs_get_dirent(mddev->kobj.sd, "sync_action"); |
e8efa9b8 JB |
3995 | mddev->sysfs_completed = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_completed"); |
3996 | mddev->sysfs_degraded = sysfs_get_dirent_safe(mddev->kobj.sd, "degraded"); | |
f72ffdd6 | 3997 | } |
db721d32 | 3998 | if (oldpers->sync_request != NULL && |
a64c876f N |
3999 | pers->sync_request == NULL) { |
4000 | /* need to remove the md_redundancy_group */ | |
4001 | if (mddev->to_remove == NULL) | |
4002 | mddev->to_remove = &md_redundancy_group; | |
4003 | } | |
4004 | ||
4cb9da7d AO |
4005 | module_put(oldpers->owner); |
4006 | ||
dafb20fa | 4007 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
4008 | if (rdev->raid_disk < 0) |
4009 | continue; | |
bf2cb0da | 4010 | if (rdev->new_raid_disk >= mddev->raid_disks) |
e93f68a1 N |
4011 | rdev->new_raid_disk = -1; |
4012 | if (rdev->new_raid_disk == rdev->raid_disk) | |
4013 | continue; | |
36fad858 | 4014 | sysfs_unlink_rdev(mddev, rdev); |
e93f68a1 | 4015 | } |
dafb20fa | 4016 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
4017 | if (rdev->raid_disk < 0) |
4018 | continue; | |
4019 | if (rdev->new_raid_disk == rdev->raid_disk) | |
4020 | continue; | |
4021 | rdev->raid_disk = rdev->new_raid_disk; | |
4022 | if (rdev->raid_disk < 0) | |
3a981b03 | 4023 | clear_bit(In_sync, &rdev->flags); |
e93f68a1 | 4024 | else { |
36fad858 | 4025 | if (sysfs_link_rdev(mddev, rdev)) |
9d48739e N |
4026 | pr_warn("md: cannot register rd%d for %s after level change\n", |
4027 | rdev->raid_disk, mdname(mddev)); | |
3a981b03 | 4028 | } |
e93f68a1 N |
4029 | } |
4030 | ||
db721d32 | 4031 | if (pers->sync_request == NULL) { |
9af204cf TM |
4032 | /* this is now an array without redundancy, so |
4033 | * it must always be in_sync | |
4034 | */ | |
4035 | mddev->in_sync = 1; | |
4036 | del_timer_sync(&mddev->safemode_timer); | |
4037 | } | |
02e5f5c0 | 4038 | blk_set_stacking_limits(&mddev->queue->limits); |
245f46c2 | 4039 | pers->run(mddev); |
2953079c | 4040 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
47525e59 | 4041 | mddev_resume(mddev); |
830778a1 N |
4042 | if (!mddev->thread) |
4043 | md_update_sb(mddev, 1); | |
e1a86dbb | 4044 | sysfs_notify_dirent_safe(mddev->sysfs_level); |
54679486 | 4045 | md_new_event(); |
6791875e N |
4046 | rv = len; |
4047 | out_unlock: | |
4048 | mddev_unlock(mddev); | |
d9d166c2 N |
4049 | return rv; |
4050 | } | |
4051 | ||
4052 | static struct md_sysfs_entry md_level = | |
80ca3a44 | 4053 | __ATTR(level, S_IRUGO|S_IWUSR, level_show, level_store); |
eae1701f | 4054 | |
d4dbd025 | 4055 | static ssize_t |
fd01b88c | 4056 | layout_show(struct mddev *mddev, char *page) |
d4dbd025 N |
4057 | { |
4058 | /* just a number, not meaningful for all levels */ | |
08a02ecd N |
4059 | if (mddev->reshape_position != MaxSector && |
4060 | mddev->layout != mddev->new_layout) | |
4061 | return sprintf(page, "%d (%d)\n", | |
4062 | mddev->new_layout, mddev->layout); | |
d4dbd025 N |
4063 | return sprintf(page, "%d\n", mddev->layout); |
4064 | } | |
4065 | ||
4066 | static ssize_t | |
fd01b88c | 4067 | layout_store(struct mddev *mddev, const char *buf, size_t len) |
d4dbd025 | 4068 | { |
4c9309c0 | 4069 | unsigned int n; |
6791875e | 4070 | int err; |
d4dbd025 | 4071 | |
4c9309c0 AD |
4072 | err = kstrtouint(buf, 10, &n); |
4073 | if (err < 0) | |
4074 | return err; | |
6791875e N |
4075 | err = mddev_lock(mddev); |
4076 | if (err) | |
4077 | return err; | |
d4dbd025 | 4078 | |
b3546035 | 4079 | if (mddev->pers) { |
50ac168a | 4080 | if (mddev->pers->check_reshape == NULL) |
6791875e | 4081 | err = -EBUSY; |
f97a5528 | 4082 | else if (!md_is_rdwr(mddev)) |
6791875e N |
4083 | err = -EROFS; |
4084 | else { | |
4085 | mddev->new_layout = n; | |
4086 | err = mddev->pers->check_reshape(mddev); | |
4087 | if (err) | |
4088 | mddev->new_layout = mddev->layout; | |
597a711b | 4089 | } |
b3546035 | 4090 | } else { |
08a02ecd | 4091 | mddev->new_layout = n; |
b3546035 N |
4092 | if (mddev->reshape_position == MaxSector) |
4093 | mddev->layout = n; | |
4094 | } | |
6791875e N |
4095 | mddev_unlock(mddev); |
4096 | return err ?: len; | |
d4dbd025 N |
4097 | } |
4098 | static struct md_sysfs_entry md_layout = | |
80ca3a44 | 4099 | __ATTR(layout, S_IRUGO|S_IWUSR, layout_show, layout_store); |
d4dbd025 | 4100 | |
eae1701f | 4101 | static ssize_t |
fd01b88c | 4102 | raid_disks_show(struct mddev *mddev, char *page) |
eae1701f | 4103 | { |
bb636547 N |
4104 | if (mddev->raid_disks == 0) |
4105 | return 0; | |
08a02ecd N |
4106 | if (mddev->reshape_position != MaxSector && |
4107 | mddev->delta_disks != 0) | |
4108 | return sprintf(page, "%d (%d)\n", mddev->raid_disks, | |
4109 | mddev->raid_disks - mddev->delta_disks); | |
eae1701f N |
4110 | return sprintf(page, "%d\n", mddev->raid_disks); |
4111 | } | |
4112 | ||
fd01b88c | 4113 | static int update_raid_disks(struct mddev *mddev, int raid_disks); |
da943b99 N |
4114 | |
4115 | static ssize_t | |
fd01b88c | 4116 | raid_disks_store(struct mddev *mddev, const char *buf, size_t len) |
da943b99 | 4117 | { |
4c9309c0 | 4118 | unsigned int n; |
6791875e | 4119 | int err; |
da943b99 | 4120 | |
4c9309c0 AD |
4121 | err = kstrtouint(buf, 10, &n); |
4122 | if (err < 0) | |
4123 | return err; | |
da943b99 | 4124 | |
6791875e N |
4125 | err = mddev_lock(mddev); |
4126 | if (err) | |
4127 | return err; | |
da943b99 | 4128 | if (mddev->pers) |
6791875e | 4129 | err = update_raid_disks(mddev, n); |
08a02ecd | 4130 | else if (mddev->reshape_position != MaxSector) { |
c6563a8c | 4131 | struct md_rdev *rdev; |
08a02ecd | 4132 | int olddisks = mddev->raid_disks - mddev->delta_disks; |
c6563a8c | 4133 | |
6791875e | 4134 | err = -EINVAL; |
c6563a8c N |
4135 | rdev_for_each(rdev, mddev) { |
4136 | if (olddisks < n && | |
4137 | rdev->data_offset < rdev->new_data_offset) | |
6791875e | 4138 | goto out_unlock; |
c6563a8c N |
4139 | if (olddisks > n && |
4140 | rdev->data_offset > rdev->new_data_offset) | |
6791875e | 4141 | goto out_unlock; |
c6563a8c | 4142 | } |
6791875e | 4143 | err = 0; |
08a02ecd N |
4144 | mddev->delta_disks = n - olddisks; |
4145 | mddev->raid_disks = n; | |
2c810cdd | 4146 | mddev->reshape_backwards = (mddev->delta_disks < 0); |
08a02ecd | 4147 | } else |
da943b99 | 4148 | mddev->raid_disks = n; |
6791875e N |
4149 | out_unlock: |
4150 | mddev_unlock(mddev); | |
4151 | return err ? err : len; | |
da943b99 N |
4152 | } |
4153 | static struct md_sysfs_entry md_raid_disks = | |
80ca3a44 | 4154 | __ATTR(raid_disks, S_IRUGO|S_IWUSR, raid_disks_show, raid_disks_store); |
eae1701f | 4155 | |
ec164d07 SP |
4156 | static ssize_t |
4157 | uuid_show(struct mddev *mddev, char *page) | |
4158 | { | |
4159 | return sprintf(page, "%pU\n", mddev->uuid); | |
4160 | } | |
4161 | static struct md_sysfs_entry md_uuid = | |
4162 | __ATTR(uuid, S_IRUGO, uuid_show, NULL); | |
4163 | ||
3b34380a | 4164 | static ssize_t |
fd01b88c | 4165 | chunk_size_show(struct mddev *mddev, char *page) |
3b34380a | 4166 | { |
08a02ecd | 4167 | if (mddev->reshape_position != MaxSector && |
664e7c41 AN |
4168 | mddev->chunk_sectors != mddev->new_chunk_sectors) |
4169 | return sprintf(page, "%d (%d)\n", | |
4170 | mddev->new_chunk_sectors << 9, | |
9d8f0363 AN |
4171 | mddev->chunk_sectors << 9); |
4172 | return sprintf(page, "%d\n", mddev->chunk_sectors << 9); | |
3b34380a N |
4173 | } |
4174 | ||
4175 | static ssize_t | |
fd01b88c | 4176 | chunk_size_store(struct mddev *mddev, const char *buf, size_t len) |
3b34380a | 4177 | { |
4c9309c0 | 4178 | unsigned long n; |
6791875e | 4179 | int err; |
3b34380a | 4180 | |
4c9309c0 AD |
4181 | err = kstrtoul(buf, 10, &n); |
4182 | if (err < 0) | |
4183 | return err; | |
3b34380a | 4184 | |
6791875e N |
4185 | err = mddev_lock(mddev); |
4186 | if (err) | |
4187 | return err; | |
b3546035 | 4188 | if (mddev->pers) { |
50ac168a | 4189 | if (mddev->pers->check_reshape == NULL) |
6791875e | 4190 | err = -EBUSY; |
f97a5528 | 4191 | else if (!md_is_rdwr(mddev)) |
6791875e N |
4192 | err = -EROFS; |
4193 | else { | |
4194 | mddev->new_chunk_sectors = n >> 9; | |
4195 | err = mddev->pers->check_reshape(mddev); | |
4196 | if (err) | |
4197 | mddev->new_chunk_sectors = mddev->chunk_sectors; | |
597a711b | 4198 | } |
b3546035 | 4199 | } else { |
664e7c41 | 4200 | mddev->new_chunk_sectors = n >> 9; |
b3546035 | 4201 | if (mddev->reshape_position == MaxSector) |
9d8f0363 | 4202 | mddev->chunk_sectors = n >> 9; |
b3546035 | 4203 | } |
6791875e N |
4204 | mddev_unlock(mddev); |
4205 | return err ?: len; | |
3b34380a N |
4206 | } |
4207 | static struct md_sysfs_entry md_chunk_size = | |
80ca3a44 | 4208 | __ATTR(chunk_size, S_IRUGO|S_IWUSR, chunk_size_show, chunk_size_store); |
3b34380a | 4209 | |
a94213b1 | 4210 | static ssize_t |
fd01b88c | 4211 | resync_start_show(struct mddev *mddev, char *page) |
a94213b1 | 4212 | { |
d1a7c503 N |
4213 | if (mddev->recovery_cp == MaxSector) |
4214 | return sprintf(page, "none\n"); | |
a94213b1 N |
4215 | return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp); |
4216 | } | |
4217 | ||
4218 | static ssize_t | |
fd01b88c | 4219 | resync_start_store(struct mddev *mddev, const char *buf, size_t len) |
a94213b1 | 4220 | { |
4c9309c0 | 4221 | unsigned long long n; |
6791875e | 4222 | int err; |
4c9309c0 AD |
4223 | |
4224 | if (cmd_match(buf, "none")) | |
4225 | n = MaxSector; | |
4226 | else { | |
4227 | err = kstrtoull(buf, 10, &n); | |
4228 | if (err < 0) | |
4229 | return err; | |
4230 | if (n != (sector_t)n) | |
4231 | return -EINVAL; | |
4232 | } | |
a94213b1 | 4233 | |
6791875e N |
4234 | err = mddev_lock(mddev); |
4235 | if (err) | |
4236 | return err; | |
b098636c | 4237 | if (mddev->pers && !test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) |
6791875e | 4238 | err = -EBUSY; |
a94213b1 | 4239 | |
6791875e N |
4240 | if (!err) { |
4241 | mddev->recovery_cp = n; | |
4242 | if (mddev->pers) | |
2953079c | 4243 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
6791875e N |
4244 | } |
4245 | mddev_unlock(mddev); | |
4246 | return err ?: len; | |
a94213b1 N |
4247 | } |
4248 | static struct md_sysfs_entry md_resync_start = | |
750f199e N |
4249 | __ATTR_PREALLOC(resync_start, S_IRUGO|S_IWUSR, |
4250 | resync_start_show, resync_start_store); | |
a94213b1 | 4251 | |
9e653b63 N |
4252 | /* |
4253 | * The array state can be: | |
4254 | * | |
4255 | * clear | |
4256 | * No devices, no size, no level | |
4257 | * Equivalent to STOP_ARRAY ioctl | |
4258 | * inactive | |
4259 | * May have some settings, but array is not active | |
4260 | * all IO results in error | |
4261 | * When written, doesn't tear down array, but just stops it | |
4262 | * suspended (not supported yet) | |
4263 | * All IO requests will block. The array can be reconfigured. | |
910d8cb3 | 4264 | * Writing this, if accepted, will block until array is quiescent |
9e653b63 N |
4265 | * readonly |
4266 | * no resync can happen. no superblocks get written. | |
4267 | * write requests fail | |
4268 | * read-auto | |
4269 | * like readonly, but behaves like 'clean' on a write request. | |
4270 | * | |
4271 | * clean - no pending writes, but otherwise active. | |
4272 | * When written to inactive array, starts without resync | |
4273 | * If a write request arrives then | |
4274 | * if metadata is known, mark 'dirty' and switch to 'active'. | |
4275 | * if not known, block and switch to write-pending | |
4276 | * If written to an active array that has pending writes, then fails. | |
4277 | * active | |
4278 | * fully active: IO and resync can be happening. | |
4279 | * When written to inactive array, starts with resync | |
4280 | * | |
4281 | * write-pending | |
4282 | * clean, but writes are blocked waiting for 'active' to be written. | |
4283 | * | |
4284 | * active-idle | |
4285 | * like active, but no writes have been seen for a while (100msec). | |
4286 | * | |
62f7b198 | 4287 | * broken |
9631abdb MT |
4288 | * Array is failed. It's useful because mounted-arrays aren't stopped |
4289 | * when array is failed, so this state will at least alert the user that | |
4290 | * something is wrong. | |
9e653b63 N |
4291 | */ |
4292 | enum array_state { clear, inactive, suspended, readonly, read_auto, clean, active, | |
62f7b198 | 4293 | write_pending, active_idle, broken, bad_word}; |
05381954 | 4294 | static char *array_states[] = { |
9e653b63 | 4295 | "clear", "inactive", "suspended", "readonly", "read-auto", "clean", "active", |
62f7b198 | 4296 | "write-pending", "active-idle", "broken", NULL }; |
9e653b63 N |
4297 | |
4298 | static int match_word(const char *word, char **list) | |
4299 | { | |
4300 | int n; | |
4301 | for (n=0; list[n]; n++) | |
4302 | if (cmd_match(word, list[n])) | |
4303 | break; | |
4304 | return n; | |
4305 | } | |
4306 | ||
4307 | static ssize_t | |
fd01b88c | 4308 | array_state_show(struct mddev *mddev, char *page) |
9e653b63 N |
4309 | { |
4310 | enum array_state st = inactive; | |
4311 | ||
62f7b198 | 4312 | if (mddev->pers && !test_bit(MD_NOT_READY, &mddev->flags)) { |
9e653b63 | 4313 | switch(mddev->ro) { |
f97a5528 | 4314 | case MD_RDONLY: |
9e653b63 N |
4315 | st = readonly; |
4316 | break; | |
f97a5528 | 4317 | case MD_AUTO_READ: |
9e653b63 N |
4318 | st = read_auto; |
4319 | break; | |
f97a5528 | 4320 | case MD_RDWR: |
55cc39f3 | 4321 | spin_lock(&mddev->lock); |
2953079c | 4322 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
e691063a | 4323 | st = write_pending; |
16f88949 TM |
4324 | else if (mddev->in_sync) |
4325 | st = clean; | |
9e653b63 N |
4326 | else if (mddev->safemode) |
4327 | st = active_idle; | |
4328 | else | |
4329 | st = active; | |
55cc39f3 | 4330 | spin_unlock(&mddev->lock); |
9e653b63 | 4331 | } |
62f7b198 GP |
4332 | |
4333 | if (test_bit(MD_BROKEN, &mddev->flags) && st == clean) | |
4334 | st = broken; | |
4335 | } else { | |
9e653b63 N |
4336 | if (list_empty(&mddev->disks) && |
4337 | mddev->raid_disks == 0 && | |
58c0fed4 | 4338 | mddev->dev_sectors == 0) |
9e653b63 N |
4339 | st = clear; |
4340 | else | |
4341 | st = inactive; | |
4342 | } | |
4343 | return sprintf(page, "%s\n", array_states[st]); | |
4344 | } | |
4345 | ||
f72ffdd6 N |
4346 | static int do_md_stop(struct mddev *mddev, int ro, struct block_device *bdev); |
4347 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev); | |
fd01b88c | 4348 | static int restart_array(struct mddev *mddev); |
9e653b63 N |
4349 | |
4350 | static ssize_t | |
fd01b88c | 4351 | array_state_store(struct mddev *mddev, const char *buf, size_t len) |
9e653b63 | 4352 | { |
6497709b | 4353 | int err = 0; |
9e653b63 | 4354 | enum array_state st = match_word(buf, array_states); |
6791875e | 4355 | |
f97a5528 YB |
4356 | if (mddev->pers && (st == active || st == clean) && |
4357 | mddev->ro != MD_RDONLY) { | |
6791875e N |
4358 | /* don't take reconfig_mutex when toggling between |
4359 | * clean and active | |
4360 | */ | |
4361 | spin_lock(&mddev->lock); | |
4362 | if (st == active) { | |
4363 | restart_array(mddev); | |
2953079c | 4364 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
91a6c4ad | 4365 | md_wakeup_thread(mddev->thread); |
6791875e | 4366 | wake_up(&mddev->sb_wait); |
6791875e N |
4367 | } else /* st == clean */ { |
4368 | restart_array(mddev); | |
6497709b | 4369 | if (!set_in_sync(mddev)) |
6791875e N |
4370 | err = -EBUSY; |
4371 | } | |
573275b5 TM |
4372 | if (!err) |
4373 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
6791875e | 4374 | spin_unlock(&mddev->lock); |
c008f1d3 | 4375 | return err ?: len; |
6791875e N |
4376 | } |
4377 | err = mddev_lock(mddev); | |
4378 | if (err) | |
4379 | return err; | |
4380 | err = -EINVAL; | |
9e653b63 N |
4381 | switch(st) { |
4382 | case bad_word: | |
4383 | break; | |
4384 | case clear: | |
4385 | /* stopping an active array */ | |
a05b7ea0 | 4386 | err = do_md_stop(mddev, 0, NULL); |
9e653b63 N |
4387 | break; |
4388 | case inactive: | |
4389 | /* stopping an active array */ | |
90cf195d | 4390 | if (mddev->pers) |
a05b7ea0 | 4391 | err = do_md_stop(mddev, 2, NULL); |
90cf195d | 4392 | else |
e691063a | 4393 | err = 0; /* already inactive */ |
9e653b63 N |
4394 | break; |
4395 | case suspended: | |
4396 | break; /* not supported yet */ | |
4397 | case readonly: | |
4398 | if (mddev->pers) | |
a05b7ea0 | 4399 | err = md_set_readonly(mddev, NULL); |
9e653b63 | 4400 | else { |
f97a5528 | 4401 | mddev->ro = MD_RDONLY; |
648b629e | 4402 | set_disk_ro(mddev->gendisk, 1); |
9e653b63 N |
4403 | err = do_md_run(mddev); |
4404 | } | |
4405 | break; | |
4406 | case read_auto: | |
9e653b63 | 4407 | if (mddev->pers) { |
f97a5528 | 4408 | if (md_is_rdwr(mddev)) |
a05b7ea0 | 4409 | err = md_set_readonly(mddev, NULL); |
f97a5528 | 4410 | else if (mddev->ro == MD_RDONLY) |
648b629e N |
4411 | err = restart_array(mddev); |
4412 | if (err == 0) { | |
f97a5528 | 4413 | mddev->ro = MD_AUTO_READ; |
648b629e N |
4414 | set_disk_ro(mddev->gendisk, 0); |
4415 | } | |
9e653b63 | 4416 | } else { |
f97a5528 | 4417 | mddev->ro = MD_AUTO_READ; |
9e653b63 N |
4418 | err = do_md_run(mddev); |
4419 | } | |
4420 | break; | |
4421 | case clean: | |
4422 | if (mddev->pers) { | |
339421de SL |
4423 | err = restart_array(mddev); |
4424 | if (err) | |
4425 | break; | |
85572d7c | 4426 | spin_lock(&mddev->lock); |
6497709b | 4427 | if (!set_in_sync(mddev)) |
e691063a | 4428 | err = -EBUSY; |
85572d7c | 4429 | spin_unlock(&mddev->lock); |
5bf29597 N |
4430 | } else |
4431 | err = -EINVAL; | |
9e653b63 N |
4432 | break; |
4433 | case active: | |
4434 | if (mddev->pers) { | |
339421de SL |
4435 | err = restart_array(mddev); |
4436 | if (err) | |
4437 | break; | |
2953079c | 4438 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
9e653b63 N |
4439 | wake_up(&mddev->sb_wait); |
4440 | err = 0; | |
4441 | } else { | |
f97a5528 | 4442 | mddev->ro = MD_RDWR; |
648b629e | 4443 | set_disk_ro(mddev->gendisk, 0); |
9e653b63 N |
4444 | err = do_md_run(mddev); |
4445 | } | |
4446 | break; | |
4447 | case write_pending: | |
4448 | case active_idle: | |
62f7b198 | 4449 | case broken: |
9e653b63 N |
4450 | /* these cannot be set */ |
4451 | break; | |
4452 | } | |
6791875e N |
4453 | |
4454 | if (!err) { | |
1d23f178 N |
4455 | if (mddev->hold_active == UNTIL_IOCTL) |
4456 | mddev->hold_active = 0; | |
00bcb4ac | 4457 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 4458 | } |
6791875e N |
4459 | mddev_unlock(mddev); |
4460 | return err ?: len; | |
9e653b63 | 4461 | } |
80ca3a44 | 4462 | static struct md_sysfs_entry md_array_state = |
750f199e | 4463 | __ATTR_PREALLOC(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store); |
9e653b63 | 4464 | |
1e50915f | 4465 | static ssize_t |
fd01b88c | 4466 | max_corrected_read_errors_show(struct mddev *mddev, char *page) { |
1e50915f RB |
4467 | return sprintf(page, "%d\n", |
4468 | atomic_read(&mddev->max_corr_read_errors)); | |
4469 | } | |
4470 | ||
4471 | static ssize_t | |
fd01b88c | 4472 | max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len) |
1e50915f | 4473 | { |
4c9309c0 AD |
4474 | unsigned int n; |
4475 | int rv; | |
1e50915f | 4476 | |
4c9309c0 AD |
4477 | rv = kstrtouint(buf, 10, &n); |
4478 | if (rv < 0) | |
4479 | return rv; | |
4480 | atomic_set(&mddev->max_corr_read_errors, n); | |
4481 | return len; | |
1e50915f RB |
4482 | } |
4483 | ||
4484 | static struct md_sysfs_entry max_corr_read_errors = | |
4485 | __ATTR(max_read_errors, S_IRUGO|S_IWUSR, max_corrected_read_errors_show, | |
4486 | max_corrected_read_errors_store); | |
4487 | ||
6d7ff738 | 4488 | static ssize_t |
fd01b88c | 4489 | null_show(struct mddev *mddev, char *page) |
6d7ff738 N |
4490 | { |
4491 | return -EINVAL; | |
4492 | } | |
4493 | ||
cc1ffe61 GJ |
4494 | /* need to ensure rdev_delayed_delete() has completed */ |
4495 | static void flush_rdev_wq(struct mddev *mddev) | |
4496 | { | |
4497 | struct md_rdev *rdev; | |
4498 | ||
4499 | rcu_read_lock(); | |
4500 | rdev_for_each_rcu(rdev, mddev) | |
4501 | if (work_pending(&rdev->del_work)) { | |
4502 | flush_workqueue(md_rdev_misc_wq); | |
4503 | break; | |
4504 | } | |
4505 | rcu_read_unlock(); | |
4506 | } | |
4507 | ||
6d7ff738 | 4508 | static ssize_t |
fd01b88c | 4509 | new_dev_store(struct mddev *mddev, const char *buf, size_t len) |
6d7ff738 N |
4510 | { |
4511 | /* buf must be %d:%d\n? giving major and minor numbers */ | |
4512 | /* The new device is added to the array. | |
4513 | * If the array has a persistent superblock, we read the | |
4514 | * superblock to initialise info and check validity. | |
4515 | * Otherwise, only checking done is that in bind_rdev_to_array, | |
4516 | * which mainly checks size. | |
4517 | */ | |
4518 | char *e; | |
4519 | int major = simple_strtoul(buf, &e, 10); | |
4520 | int minor; | |
4521 | dev_t dev; | |
3cb03002 | 4522 | struct md_rdev *rdev; |
6d7ff738 N |
4523 | int err; |
4524 | ||
4525 | if (!*buf || *e != ':' || !e[1] || e[1] == '\n') | |
4526 | return -EINVAL; | |
4527 | minor = simple_strtoul(e+1, &e, 10); | |
4528 | if (*e && *e != '\n') | |
4529 | return -EINVAL; | |
4530 | dev = MKDEV(major, minor); | |
4531 | if (major != MAJOR(dev) || | |
4532 | minor != MINOR(dev)) | |
4533 | return -EOVERFLOW; | |
4534 | ||
cc1ffe61 | 4535 | flush_rdev_wq(mddev); |
6791875e N |
4536 | err = mddev_lock(mddev); |
4537 | if (err) | |
4538 | return err; | |
6d7ff738 N |
4539 | if (mddev->persistent) { |
4540 | rdev = md_import_device(dev, mddev->major_version, | |
4541 | mddev->minor_version); | |
4542 | if (!IS_ERR(rdev) && !list_empty(&mddev->disks)) { | |
3cb03002 N |
4543 | struct md_rdev *rdev0 |
4544 | = list_entry(mddev->disks.next, | |
4545 | struct md_rdev, same_set); | |
6d7ff738 N |
4546 | err = super_types[mddev->major_version] |
4547 | .load_super(rdev, rdev0, mddev->minor_version); | |
4548 | if (err < 0) | |
4549 | goto out; | |
4550 | } | |
c5d79adb N |
4551 | } else if (mddev->external) |
4552 | rdev = md_import_device(dev, -2, -1); | |
4553 | else | |
6d7ff738 N |
4554 | rdev = md_import_device(dev, -1, -1); |
4555 | ||
9a8c0fa8 N |
4556 | if (IS_ERR(rdev)) { |
4557 | mddev_unlock(mddev); | |
6d7ff738 | 4558 | return PTR_ERR(rdev); |
9a8c0fa8 | 4559 | } |
6d7ff738 N |
4560 | err = bind_rdev_to_array(rdev, mddev); |
4561 | out: | |
4562 | if (err) | |
4563 | export_rdev(rdev); | |
6791875e | 4564 | mddev_unlock(mddev); |
5492c46e | 4565 | if (!err) |
54679486 | 4566 | md_new_event(); |
6d7ff738 N |
4567 | return err ? err : len; |
4568 | } | |
4569 | ||
4570 | static struct md_sysfs_entry md_new_device = | |
80ca3a44 | 4571 | __ATTR(new_dev, S_IWUSR, null_show, new_dev_store); |
3b34380a | 4572 | |
9b1d1dac | 4573 | static ssize_t |
fd01b88c | 4574 | bitmap_store(struct mddev *mddev, const char *buf, size_t len) |
9b1d1dac PC |
4575 | { |
4576 | char *end; | |
4577 | unsigned long chunk, end_chunk; | |
6791875e | 4578 | int err; |
9b1d1dac | 4579 | |
6791875e N |
4580 | err = mddev_lock(mddev); |
4581 | if (err) | |
4582 | return err; | |
9b1d1dac PC |
4583 | if (!mddev->bitmap) |
4584 | goto out; | |
4585 | /* buf should be <chunk> <chunk> ... or <chunk>-<chunk> ... (range) */ | |
4586 | while (*buf) { | |
4587 | chunk = end_chunk = simple_strtoul(buf, &end, 0); | |
4588 | if (buf == end) break; | |
4589 | if (*end == '-') { /* range */ | |
4590 | buf = end + 1; | |
4591 | end_chunk = simple_strtoul(buf, &end, 0); | |
4592 | if (buf == end) break; | |
4593 | } | |
4594 | if (*end && !isspace(*end)) break; | |
e64e4018 | 4595 | md_bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk); |
e7d2860b | 4596 | buf = skip_spaces(end); |
9b1d1dac | 4597 | } |
e64e4018 | 4598 | md_bitmap_unplug(mddev->bitmap); /* flush the bits to disk */ |
9b1d1dac | 4599 | out: |
6791875e | 4600 | mddev_unlock(mddev); |
9b1d1dac PC |
4601 | return len; |
4602 | } | |
4603 | ||
4604 | static struct md_sysfs_entry md_bitmap = | |
4605 | __ATTR(bitmap_set_bits, S_IWUSR, null_show, bitmap_store); | |
4606 | ||
a35b0d69 | 4607 | static ssize_t |
fd01b88c | 4608 | size_show(struct mddev *mddev, char *page) |
a35b0d69 | 4609 | { |
58c0fed4 AN |
4610 | return sprintf(page, "%llu\n", |
4611 | (unsigned long long)mddev->dev_sectors / 2); | |
a35b0d69 N |
4612 | } |
4613 | ||
fd01b88c | 4614 | static int update_size(struct mddev *mddev, sector_t num_sectors); |
a35b0d69 N |
4615 | |
4616 | static ssize_t | |
fd01b88c | 4617 | size_store(struct mddev *mddev, const char *buf, size_t len) |
a35b0d69 N |
4618 | { |
4619 | /* If array is inactive, we can reduce the component size, but | |
4620 | * not increase it (except from 0). | |
4621 | * If array is active, we can try an on-line resize | |
4622 | */ | |
b522adcd DW |
4623 | sector_t sectors; |
4624 | int err = strict_blocks_to_sectors(buf, §ors); | |
a35b0d69 | 4625 | |
58c0fed4 AN |
4626 | if (err < 0) |
4627 | return err; | |
6791875e N |
4628 | err = mddev_lock(mddev); |
4629 | if (err) | |
4630 | return err; | |
a35b0d69 | 4631 | if (mddev->pers) { |
58c0fed4 | 4632 | err = update_size(mddev, sectors); |
4ba1e788 XN |
4633 | if (err == 0) |
4634 | md_update_sb(mddev, 1); | |
a35b0d69 | 4635 | } else { |
58c0fed4 AN |
4636 | if (mddev->dev_sectors == 0 || |
4637 | mddev->dev_sectors > sectors) | |
4638 | mddev->dev_sectors = sectors; | |
a35b0d69 N |
4639 | else |
4640 | err = -ENOSPC; | |
4641 | } | |
6791875e | 4642 | mddev_unlock(mddev); |
a35b0d69 N |
4643 | return err ? err : len; |
4644 | } | |
4645 | ||
4646 | static struct md_sysfs_entry md_size = | |
80ca3a44 | 4647 | __ATTR(component_size, S_IRUGO|S_IWUSR, size_show, size_store); |
a35b0d69 | 4648 | |
83f0d77a | 4649 | /* Metadata version. |
e691063a N |
4650 | * This is one of |
4651 | * 'none' for arrays with no metadata (good luck...) | |
4652 | * 'external' for arrays with externally managed metadata, | |
8bb93aac N |
4653 | * or N.M for internally known formats |
4654 | */ | |
4655 | static ssize_t | |
fd01b88c | 4656 | metadata_show(struct mddev *mddev, char *page) |
8bb93aac N |
4657 | { |
4658 | if (mddev->persistent) | |
4659 | return sprintf(page, "%d.%d\n", | |
4660 | mddev->major_version, mddev->minor_version); | |
e691063a N |
4661 | else if (mddev->external) |
4662 | return sprintf(page, "external:%s\n", mddev->metadata_type); | |
8bb93aac N |
4663 | else |
4664 | return sprintf(page, "none\n"); | |
4665 | } | |
4666 | ||
4667 | static ssize_t | |
fd01b88c | 4668 | metadata_store(struct mddev *mddev, const char *buf, size_t len) |
8bb93aac N |
4669 | { |
4670 | int major, minor; | |
4671 | char *e; | |
6791875e | 4672 | int err; |
ea43ddd8 N |
4673 | /* Changing the details of 'external' metadata is |
4674 | * always permitted. Otherwise there must be | |
4675 | * no devices attached to the array. | |
4676 | */ | |
6791875e N |
4677 | |
4678 | err = mddev_lock(mddev); | |
4679 | if (err) | |
4680 | return err; | |
4681 | err = -EBUSY; | |
ea43ddd8 N |
4682 | if (mddev->external && strncmp(buf, "external:", 9) == 0) |
4683 | ; | |
4684 | else if (!list_empty(&mddev->disks)) | |
6791875e | 4685 | goto out_unlock; |
8bb93aac | 4686 | |
6791875e | 4687 | err = 0; |
8bb93aac N |
4688 | if (cmd_match(buf, "none")) { |
4689 | mddev->persistent = 0; | |
e691063a N |
4690 | mddev->external = 0; |
4691 | mddev->major_version = 0; | |
4692 | mddev->minor_version = 90; | |
6791875e | 4693 | goto out_unlock; |
e691063a N |
4694 | } |
4695 | if (strncmp(buf, "external:", 9) == 0) { | |
20a49ff6 | 4696 | size_t namelen = len-9; |
e691063a N |
4697 | if (namelen >= sizeof(mddev->metadata_type)) |
4698 | namelen = sizeof(mddev->metadata_type)-1; | |
4699 | strncpy(mddev->metadata_type, buf+9, namelen); | |
4700 | mddev->metadata_type[namelen] = 0; | |
4701 | if (namelen && mddev->metadata_type[namelen-1] == '\n') | |
4702 | mddev->metadata_type[--namelen] = 0; | |
4703 | mddev->persistent = 0; | |
4704 | mddev->external = 1; | |
8bb93aac N |
4705 | mddev->major_version = 0; |
4706 | mddev->minor_version = 90; | |
6791875e | 4707 | goto out_unlock; |
8bb93aac N |
4708 | } |
4709 | major = simple_strtoul(buf, &e, 10); | |
6791875e | 4710 | err = -EINVAL; |
8bb93aac | 4711 | if (e==buf || *e != '.') |
6791875e | 4712 | goto out_unlock; |
8bb93aac N |
4713 | buf = e+1; |
4714 | minor = simple_strtoul(buf, &e, 10); | |
3f9d7b0d | 4715 | if (e==buf || (*e && *e != '\n') ) |
6791875e N |
4716 | goto out_unlock; |
4717 | err = -ENOENT; | |
50511da3 | 4718 | if (major >= ARRAY_SIZE(super_types) || super_types[major].name == NULL) |
6791875e | 4719 | goto out_unlock; |
8bb93aac N |
4720 | mddev->major_version = major; |
4721 | mddev->minor_version = minor; | |
4722 | mddev->persistent = 1; | |
e691063a | 4723 | mddev->external = 0; |
6791875e N |
4724 | err = 0; |
4725 | out_unlock: | |
4726 | mddev_unlock(mddev); | |
4727 | return err ?: len; | |
8bb93aac N |
4728 | } |
4729 | ||
4730 | static struct md_sysfs_entry md_metadata = | |
750f199e | 4731 | __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store); |
8bb93aac | 4732 | |
24dd469d | 4733 | static ssize_t |
fd01b88c | 4734 | action_show(struct mddev *mddev, char *page) |
24dd469d | 4735 | { |
7eec314d | 4736 | char *type = "idle"; |
b7b17c9b N |
4737 | unsigned long recovery = mddev->recovery; |
4738 | if (test_bit(MD_RECOVERY_FROZEN, &recovery)) | |
b6a9ce68 | 4739 | type = "frozen"; |
b7b17c9b | 4740 | else if (test_bit(MD_RECOVERY_RUNNING, &recovery) || |
f97a5528 | 4741 | (md_is_rdwr(mddev) && test_bit(MD_RECOVERY_NEEDED, &recovery))) { |
b7b17c9b | 4742 | if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) |
ccfcc3c1 | 4743 | type = "reshape"; |
b7b17c9b N |
4744 | else if (test_bit(MD_RECOVERY_SYNC, &recovery)) { |
4745 | if (!test_bit(MD_RECOVERY_REQUESTED, &recovery)) | |
24dd469d | 4746 | type = "resync"; |
b7b17c9b | 4747 | else if (test_bit(MD_RECOVERY_CHECK, &recovery)) |
24dd469d N |
4748 | type = "check"; |
4749 | else | |
4750 | type = "repair"; | |
b7b17c9b | 4751 | } else if (test_bit(MD_RECOVERY_RECOVER, &recovery)) |
24dd469d | 4752 | type = "recover"; |
985ca973 N |
4753 | else if (mddev->reshape_position != MaxSector) |
4754 | type = "reshape"; | |
24dd469d N |
4755 | } |
4756 | return sprintf(page, "%s\n", type); | |
4757 | } | |
4758 | ||
4759 | static ssize_t | |
fd01b88c | 4760 | action_store(struct mddev *mddev, const char *page, size_t len) |
24dd469d | 4761 | { |
7eec314d N |
4762 | if (!mddev->pers || !mddev->pers->sync_request) |
4763 | return -EINVAL; | |
4764 | ||
b6a9ce68 N |
4765 | |
4766 | if (cmd_match(page, "idle") || cmd_match(page, "frozen")) { | |
56ccc112 N |
4767 | if (cmd_match(page, "frozen")) |
4768 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4769 | else | |
4770 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
8e8e2518 N |
4771 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
4772 | mddev_lock(mddev) == 0) { | |
cc1ffe61 GJ |
4773 | if (work_pending(&mddev->del_work)) |
4774 | flush_workqueue(md_misc_wq); | |
8e8e2518 | 4775 | if (mddev->sync_thread) { |
9dfbdafd GJ |
4776 | sector_t save_rp = mddev->reshape_position; |
4777 | ||
4778 | mddev_unlock(mddev); | |
4779 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
4780 | md_unregister_thread(&mddev->sync_thread); | |
4781 | mddev_lock_nointr(mddev); | |
4782 | /* | |
4783 | * set RECOVERY_INTR again and restore reshape | |
4784 | * position in case others changed them after | |
4785 | * got lock, eg, reshape_position_store and | |
4786 | * md_check_recovery. | |
4787 | */ | |
4788 | mddev->reshape_position = save_rp; | |
8e8e2518 | 4789 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
d0a18034 | 4790 | md_reap_sync_thread(mddev); |
6791875e | 4791 | } |
8e8e2518 | 4792 | mddev_unlock(mddev); |
7eec314d | 4793 | } |
312045ee | 4794 | } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
24dd469d | 4795 | return -EBUSY; |
72a23c21 | 4796 | else if (cmd_match(page, "resync")) |
56ccc112 | 4797 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4798 | else if (cmd_match(page, "recover")) { |
56ccc112 | 4799 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4800 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
72a23c21 | 4801 | } else if (cmd_match(page, "reshape")) { |
16484bf5 N |
4802 | int err; |
4803 | if (mddev->pers->start_reshape == NULL) | |
4804 | return -EINVAL; | |
6791875e N |
4805 | err = mddev_lock(mddev); |
4806 | if (!err) { | |
312045ee N |
4807 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4808 | err = -EBUSY; | |
4809 | else { | |
4810 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4811 | err = mddev->pers->start_reshape(mddev); | |
4812 | } | |
6791875e N |
4813 | mddev_unlock(mddev); |
4814 | } | |
16484bf5 N |
4815 | if (err) |
4816 | return err; | |
e1a86dbb | 4817 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
16484bf5 | 4818 | } else { |
bce74dac | 4819 | if (cmd_match(page, "check")) |
7eec314d | 4820 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
2adc7d47 | 4821 | else if (!cmd_match(page, "repair")) |
7eec314d | 4822 | return -EINVAL; |
56ccc112 | 4823 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
7eec314d N |
4824 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
4825 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
7eec314d | 4826 | } |
f97a5528 | 4827 | if (mddev->ro == MD_AUTO_READ) { |
48c26ddc N |
4828 | /* A write to sync_action is enough to justify |
4829 | * canceling read-auto mode | |
4830 | */ | |
f97a5528 | 4831 | mddev->ro = MD_RDWR; |
48c26ddc N |
4832 | md_wakeup_thread(mddev->sync_thread); |
4833 | } | |
03c902e1 | 4834 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
24dd469d | 4835 | md_wakeup_thread(mddev->thread); |
00bcb4ac | 4836 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
24dd469d N |
4837 | return len; |
4838 | } | |
4839 | ||
c4a39551 | 4840 | static struct md_sysfs_entry md_scan_mode = |
750f199e | 4841 | __ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store); |
c4a39551 JB |
4842 | |
4843 | static ssize_t | |
4844 | last_sync_action_show(struct mddev *mddev, char *page) | |
4845 | { | |
4846 | return sprintf(page, "%s\n", mddev->last_sync_action); | |
4847 | } | |
4848 | ||
4849 | static struct md_sysfs_entry md_last_scan_mode = __ATTR_RO(last_sync_action); | |
4850 | ||
9d88883e | 4851 | static ssize_t |
fd01b88c | 4852 | mismatch_cnt_show(struct mddev *mddev, char *page) |
9d88883e N |
4853 | { |
4854 | return sprintf(page, "%llu\n", | |
7f7583d4 JM |
4855 | (unsigned long long) |
4856 | atomic64_read(&mddev->resync_mismatches)); | |
9d88883e N |
4857 | } |
4858 | ||
80ca3a44 | 4859 | static struct md_sysfs_entry md_mismatches = __ATTR_RO(mismatch_cnt); |
9d88883e | 4860 | |
88202a0c | 4861 | static ssize_t |
fd01b88c | 4862 | sync_min_show(struct mddev *mddev, char *page) |
88202a0c N |
4863 | { |
4864 | return sprintf(page, "%d (%s)\n", speed_min(mddev), | |
4865 | mddev->sync_speed_min ? "local": "system"); | |
4866 | } | |
4867 | ||
4868 | static ssize_t | |
fd01b88c | 4869 | sync_min_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4870 | { |
4c9309c0 AD |
4871 | unsigned int min; |
4872 | int rv; | |
4873 | ||
88202a0c | 4874 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4875 | min = 0; |
4876 | } else { | |
4877 | rv = kstrtouint(buf, 10, &min); | |
4878 | if (rv < 0) | |
4879 | return rv; | |
4880 | if (min == 0) | |
4881 | return -EINVAL; | |
88202a0c | 4882 | } |
88202a0c N |
4883 | mddev->sync_speed_min = min; |
4884 | return len; | |
4885 | } | |
4886 | ||
4887 | static struct md_sysfs_entry md_sync_min = | |
4888 | __ATTR(sync_speed_min, S_IRUGO|S_IWUSR, sync_min_show, sync_min_store); | |
4889 | ||
4890 | static ssize_t | |
fd01b88c | 4891 | sync_max_show(struct mddev *mddev, char *page) |
88202a0c N |
4892 | { |
4893 | return sprintf(page, "%d (%s)\n", speed_max(mddev), | |
4894 | mddev->sync_speed_max ? "local": "system"); | |
4895 | } | |
4896 | ||
4897 | static ssize_t | |
fd01b88c | 4898 | sync_max_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4899 | { |
4c9309c0 AD |
4900 | unsigned int max; |
4901 | int rv; | |
4902 | ||
88202a0c | 4903 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4904 | max = 0; |
4905 | } else { | |
4906 | rv = kstrtouint(buf, 10, &max); | |
4907 | if (rv < 0) | |
4908 | return rv; | |
4909 | if (max == 0) | |
4910 | return -EINVAL; | |
88202a0c | 4911 | } |
88202a0c N |
4912 | mddev->sync_speed_max = max; |
4913 | return len; | |
4914 | } | |
4915 | ||
4916 | static struct md_sysfs_entry md_sync_max = | |
4917 | __ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store); | |
4918 | ||
d7f3d291 | 4919 | static ssize_t |
fd01b88c | 4920 | degraded_show(struct mddev *mddev, char *page) |
d7f3d291 IP |
4921 | { |
4922 | return sprintf(page, "%d\n", mddev->degraded); | |
4923 | } | |
4924 | static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded); | |
88202a0c | 4925 | |
90b08710 | 4926 | static ssize_t |
fd01b88c | 4927 | sync_force_parallel_show(struct mddev *mddev, char *page) |
90b08710 BS |
4928 | { |
4929 | return sprintf(page, "%d\n", mddev->parallel_resync); | |
4930 | } | |
4931 | ||
4932 | static ssize_t | |
fd01b88c | 4933 | sync_force_parallel_store(struct mddev *mddev, const char *buf, size_t len) |
90b08710 BS |
4934 | { |
4935 | long n; | |
4936 | ||
b29bebd6 | 4937 | if (kstrtol(buf, 10, &n)) |
90b08710 BS |
4938 | return -EINVAL; |
4939 | ||
4940 | if (n != 0 && n != 1) | |
4941 | return -EINVAL; | |
4942 | ||
4943 | mddev->parallel_resync = n; | |
4944 | ||
4945 | if (mddev->sync_thread) | |
4946 | wake_up(&resync_wait); | |
4947 | ||
4948 | return len; | |
4949 | } | |
4950 | ||
4951 | /* force parallel resync, even with shared block devices */ | |
4952 | static struct md_sysfs_entry md_sync_force_parallel = | |
4953 | __ATTR(sync_force_parallel, S_IRUGO|S_IWUSR, | |
4954 | sync_force_parallel_show, sync_force_parallel_store); | |
4955 | ||
88202a0c | 4956 | static ssize_t |
fd01b88c | 4957 | sync_speed_show(struct mddev *mddev, char *page) |
88202a0c N |
4958 | { |
4959 | unsigned long resync, dt, db; | |
eac58d08 | 4960 | if (mddev->curr_resync == MD_RESYNC_NONE) |
d1a7c503 | 4961 | return sprintf(page, "none\n"); |
9687a60c AN |
4962 | resync = mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active); |
4963 | dt = (jiffies - mddev->resync_mark) / HZ; | |
88202a0c | 4964 | if (!dt) dt++; |
9687a60c AN |
4965 | db = resync - mddev->resync_mark_cnt; |
4966 | return sprintf(page, "%lu\n", db/dt/2); /* K/sec */ | |
88202a0c N |
4967 | } |
4968 | ||
80ca3a44 | 4969 | static struct md_sysfs_entry md_sync_speed = __ATTR_RO(sync_speed); |
88202a0c N |
4970 | |
4971 | static ssize_t | |
fd01b88c | 4972 | sync_completed_show(struct mddev *mddev, char *page) |
88202a0c | 4973 | { |
13ae864b | 4974 | unsigned long long max_sectors, resync; |
88202a0c | 4975 | |
acb180b0 N |
4976 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4977 | return sprintf(page, "none\n"); | |
4978 | ||
eac58d08 LG |
4979 | if (mddev->curr_resync == MD_RESYNC_YIELDED || |
4980 | mddev->curr_resync == MD_RESYNC_DELAYED) | |
72f36d59 N |
4981 | return sprintf(page, "delayed\n"); |
4982 | ||
c804cdec N |
4983 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
4984 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
58c0fed4 | 4985 | max_sectors = mddev->resync_max_sectors; |
88202a0c | 4986 | else |
58c0fed4 | 4987 | max_sectors = mddev->dev_sectors; |
88202a0c | 4988 | |
acb180b0 | 4989 | resync = mddev->curr_resync_completed; |
13ae864b | 4990 | return sprintf(page, "%llu / %llu\n", resync, max_sectors); |
88202a0c N |
4991 | } |
4992 | ||
750f199e N |
4993 | static struct md_sysfs_entry md_sync_completed = |
4994 | __ATTR_PREALLOC(sync_completed, S_IRUGO, sync_completed_show, NULL); | |
88202a0c | 4995 | |
5e96ee65 | 4996 | static ssize_t |
fd01b88c | 4997 | min_sync_show(struct mddev *mddev, char *page) |
5e96ee65 NB |
4998 | { |
4999 | return sprintf(page, "%llu\n", | |
5000 | (unsigned long long)mddev->resync_min); | |
5001 | } | |
5002 | static ssize_t | |
fd01b88c | 5003 | min_sync_store(struct mddev *mddev, const char *buf, size_t len) |
5e96ee65 NB |
5004 | { |
5005 | unsigned long long min; | |
23da422b | 5006 | int err; |
23da422b | 5007 | |
b29bebd6 | 5008 | if (kstrtoull(buf, 10, &min)) |
5e96ee65 | 5009 | return -EINVAL; |
23da422b N |
5010 | |
5011 | spin_lock(&mddev->lock); | |
5012 | err = -EINVAL; | |
5e96ee65 | 5013 | if (min > mddev->resync_max) |
23da422b N |
5014 | goto out_unlock; |
5015 | ||
5016 | err = -EBUSY; | |
5e96ee65 | 5017 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 5018 | goto out_unlock; |
5e96ee65 | 5019 | |
50c37b13 N |
5020 | /* Round down to multiple of 4K for safety */ |
5021 | mddev->resync_min = round_down(min, 8); | |
23da422b | 5022 | err = 0; |
5e96ee65 | 5023 | |
23da422b N |
5024 | out_unlock: |
5025 | spin_unlock(&mddev->lock); | |
5026 | return err ?: len; | |
5e96ee65 NB |
5027 | } |
5028 | ||
5029 | static struct md_sysfs_entry md_min_sync = | |
5030 | __ATTR(sync_min, S_IRUGO|S_IWUSR, min_sync_show, min_sync_store); | |
5031 | ||
c6207277 | 5032 | static ssize_t |
fd01b88c | 5033 | max_sync_show(struct mddev *mddev, char *page) |
c6207277 N |
5034 | { |
5035 | if (mddev->resync_max == MaxSector) | |
5036 | return sprintf(page, "max\n"); | |
5037 | else | |
5038 | return sprintf(page, "%llu\n", | |
5039 | (unsigned long long)mddev->resync_max); | |
5040 | } | |
5041 | static ssize_t | |
fd01b88c | 5042 | max_sync_store(struct mddev *mddev, const char *buf, size_t len) |
c6207277 | 5043 | { |
23da422b N |
5044 | int err; |
5045 | spin_lock(&mddev->lock); | |
c6207277 N |
5046 | if (strncmp(buf, "max", 3) == 0) |
5047 | mddev->resync_max = MaxSector; | |
5048 | else { | |
5e96ee65 | 5049 | unsigned long long max; |
23da422b N |
5050 | int chunk; |
5051 | ||
5052 | err = -EINVAL; | |
b29bebd6 | 5053 | if (kstrtoull(buf, 10, &max)) |
23da422b | 5054 | goto out_unlock; |
5e96ee65 | 5055 | if (max < mddev->resync_min) |
23da422b N |
5056 | goto out_unlock; |
5057 | ||
5058 | err = -EBUSY; | |
f97a5528 | 5059 | if (max < mddev->resync_max && md_is_rdwr(mddev) && |
c6207277 | 5060 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 5061 | goto out_unlock; |
c6207277 N |
5062 | |
5063 | /* Must be a multiple of chunk_size */ | |
23da422b N |
5064 | chunk = mddev->chunk_sectors; |
5065 | if (chunk) { | |
2ac06c33 | 5066 | sector_t temp = max; |
23da422b N |
5067 | |
5068 | err = -EINVAL; | |
5069 | if (sector_div(temp, chunk)) | |
5070 | goto out_unlock; | |
c6207277 N |
5071 | } |
5072 | mddev->resync_max = max; | |
5073 | } | |
5074 | wake_up(&mddev->recovery_wait); | |
23da422b N |
5075 | err = 0; |
5076 | out_unlock: | |
5077 | spin_unlock(&mddev->lock); | |
5078 | return err ?: len; | |
c6207277 N |
5079 | } |
5080 | ||
5081 | static struct md_sysfs_entry md_max_sync = | |
5082 | __ATTR(sync_max, S_IRUGO|S_IWUSR, max_sync_show, max_sync_store); | |
5083 | ||
e464eafd | 5084 | static ssize_t |
fd01b88c | 5085 | suspend_lo_show(struct mddev *mddev, char *page) |
e464eafd N |
5086 | { |
5087 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_lo); | |
5088 | } | |
5089 | ||
5090 | static ssize_t | |
fd01b88c | 5091 | suspend_lo_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5092 | { |
b03e0ccb | 5093 | unsigned long long new; |
6791875e | 5094 | int err; |
e464eafd | 5095 | |
4c9309c0 AD |
5096 | err = kstrtoull(buf, 10, &new); |
5097 | if (err < 0) | |
5098 | return err; | |
5099 | if (new != (sector_t)new) | |
e464eafd | 5100 | return -EINVAL; |
23ddff37 | 5101 | |
6791875e N |
5102 | err = mddev_lock(mddev); |
5103 | if (err) | |
5104 | return err; | |
5105 | err = -EINVAL; | |
5106 | if (mddev->pers == NULL || | |
5107 | mddev->pers->quiesce == NULL) | |
5108 | goto unlock; | |
b03e0ccb | 5109 | mddev_suspend(mddev); |
23ddff37 | 5110 | mddev->suspend_lo = new; |
b03e0ccb N |
5111 | mddev_resume(mddev); |
5112 | ||
6791875e N |
5113 | err = 0; |
5114 | unlock: | |
5115 | mddev_unlock(mddev); | |
5116 | return err ?: len; | |
e464eafd N |
5117 | } |
5118 | static struct md_sysfs_entry md_suspend_lo = | |
5119 | __ATTR(suspend_lo, S_IRUGO|S_IWUSR, suspend_lo_show, suspend_lo_store); | |
5120 | ||
e464eafd | 5121 | static ssize_t |
fd01b88c | 5122 | suspend_hi_show(struct mddev *mddev, char *page) |
e464eafd N |
5123 | { |
5124 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_hi); | |
5125 | } | |
5126 | ||
5127 | static ssize_t | |
fd01b88c | 5128 | suspend_hi_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5129 | { |
b03e0ccb | 5130 | unsigned long long new; |
6791875e | 5131 | int err; |
e464eafd | 5132 | |
4c9309c0 AD |
5133 | err = kstrtoull(buf, 10, &new); |
5134 | if (err < 0) | |
5135 | return err; | |
5136 | if (new != (sector_t)new) | |
e464eafd | 5137 | return -EINVAL; |
23ddff37 | 5138 | |
6791875e N |
5139 | err = mddev_lock(mddev); |
5140 | if (err) | |
5141 | return err; | |
5142 | err = -EINVAL; | |
b03e0ccb | 5143 | if (mddev->pers == NULL) |
6791875e | 5144 | goto unlock; |
b03e0ccb N |
5145 | |
5146 | mddev_suspend(mddev); | |
23ddff37 | 5147 | mddev->suspend_hi = new; |
b03e0ccb N |
5148 | mddev_resume(mddev); |
5149 | ||
6791875e N |
5150 | err = 0; |
5151 | unlock: | |
5152 | mddev_unlock(mddev); | |
5153 | return err ?: len; | |
e464eafd N |
5154 | } |
5155 | static struct md_sysfs_entry md_suspend_hi = | |
5156 | __ATTR(suspend_hi, S_IRUGO|S_IWUSR, suspend_hi_show, suspend_hi_store); | |
5157 | ||
08a02ecd | 5158 | static ssize_t |
fd01b88c | 5159 | reshape_position_show(struct mddev *mddev, char *page) |
08a02ecd N |
5160 | { |
5161 | if (mddev->reshape_position != MaxSector) | |
5162 | return sprintf(page, "%llu\n", | |
5163 | (unsigned long long)mddev->reshape_position); | |
5164 | strcpy(page, "none\n"); | |
5165 | return 5; | |
5166 | } | |
5167 | ||
5168 | static ssize_t | |
fd01b88c | 5169 | reshape_position_store(struct mddev *mddev, const char *buf, size_t len) |
08a02ecd | 5170 | { |
c6563a8c | 5171 | struct md_rdev *rdev; |
4c9309c0 | 5172 | unsigned long long new; |
6791875e | 5173 | int err; |
6791875e | 5174 | |
4c9309c0 AD |
5175 | err = kstrtoull(buf, 10, &new); |
5176 | if (err < 0) | |
5177 | return err; | |
5178 | if (new != (sector_t)new) | |
08a02ecd | 5179 | return -EINVAL; |
6791875e N |
5180 | err = mddev_lock(mddev); |
5181 | if (err) | |
5182 | return err; | |
5183 | err = -EBUSY; | |
5184 | if (mddev->pers) | |
5185 | goto unlock; | |
08a02ecd N |
5186 | mddev->reshape_position = new; |
5187 | mddev->delta_disks = 0; | |
2c810cdd | 5188 | mddev->reshape_backwards = 0; |
08a02ecd N |
5189 | mddev->new_level = mddev->level; |
5190 | mddev->new_layout = mddev->layout; | |
664e7c41 | 5191 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
c6563a8c N |
5192 | rdev_for_each(rdev, mddev) |
5193 | rdev->new_data_offset = rdev->data_offset; | |
6791875e N |
5194 | err = 0; |
5195 | unlock: | |
5196 | mddev_unlock(mddev); | |
5197 | return err ?: len; | |
08a02ecd N |
5198 | } |
5199 | ||
5200 | static struct md_sysfs_entry md_reshape_position = | |
5201 | __ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show, | |
5202 | reshape_position_store); | |
5203 | ||
2c810cdd N |
5204 | static ssize_t |
5205 | reshape_direction_show(struct mddev *mddev, char *page) | |
5206 | { | |
5207 | return sprintf(page, "%s\n", | |
5208 | mddev->reshape_backwards ? "backwards" : "forwards"); | |
5209 | } | |
5210 | ||
5211 | static ssize_t | |
5212 | reshape_direction_store(struct mddev *mddev, const char *buf, size_t len) | |
5213 | { | |
5214 | int backwards = 0; | |
6791875e N |
5215 | int err; |
5216 | ||
2c810cdd N |
5217 | if (cmd_match(buf, "forwards")) |
5218 | backwards = 0; | |
5219 | else if (cmd_match(buf, "backwards")) | |
5220 | backwards = 1; | |
5221 | else | |
5222 | return -EINVAL; | |
5223 | if (mddev->reshape_backwards == backwards) | |
5224 | return len; | |
5225 | ||
6791875e N |
5226 | err = mddev_lock(mddev); |
5227 | if (err) | |
5228 | return err; | |
2c810cdd N |
5229 | /* check if we are allowed to change */ |
5230 | if (mddev->delta_disks) | |
6791875e N |
5231 | err = -EBUSY; |
5232 | else if (mddev->persistent && | |
2c810cdd | 5233 | mddev->major_version == 0) |
6791875e N |
5234 | err = -EINVAL; |
5235 | else | |
5236 | mddev->reshape_backwards = backwards; | |
5237 | mddev_unlock(mddev); | |
5238 | return err ?: len; | |
2c810cdd N |
5239 | } |
5240 | ||
5241 | static struct md_sysfs_entry md_reshape_direction = | |
5242 | __ATTR(reshape_direction, S_IRUGO|S_IWUSR, reshape_direction_show, | |
5243 | reshape_direction_store); | |
5244 | ||
b522adcd | 5245 | static ssize_t |
fd01b88c | 5246 | array_size_show(struct mddev *mddev, char *page) |
b522adcd DW |
5247 | { |
5248 | if (mddev->external_size) | |
5249 | return sprintf(page, "%llu\n", | |
5250 | (unsigned long long)mddev->array_sectors/2); | |
5251 | else | |
5252 | return sprintf(page, "default\n"); | |
5253 | } | |
5254 | ||
5255 | static ssize_t | |
fd01b88c | 5256 | array_size_store(struct mddev *mddev, const char *buf, size_t len) |
b522adcd DW |
5257 | { |
5258 | sector_t sectors; | |
6791875e N |
5259 | int err; |
5260 | ||
5261 | err = mddev_lock(mddev); | |
5262 | if (err) | |
5263 | return err; | |
b522adcd | 5264 | |
ab5a98b1 | 5265 | /* cluster raid doesn't support change array_sectors */ |
b670883b ZL |
5266 | if (mddev_is_clustered(mddev)) { |
5267 | mddev_unlock(mddev); | |
ab5a98b1 | 5268 | return -EINVAL; |
b670883b | 5269 | } |
ab5a98b1 | 5270 | |
b522adcd DW |
5271 | if (strncmp(buf, "default", 7) == 0) { |
5272 | if (mddev->pers) | |
5273 | sectors = mddev->pers->size(mddev, 0, 0); | |
5274 | else | |
5275 | sectors = mddev->array_sectors; | |
5276 | ||
5277 | mddev->external_size = 0; | |
5278 | } else { | |
5279 | if (strict_blocks_to_sectors(buf, §ors) < 0) | |
6791875e N |
5280 | err = -EINVAL; |
5281 | else if (mddev->pers && mddev->pers->size(mddev, 0, 0) < sectors) | |
5282 | err = -E2BIG; | |
5283 | else | |
5284 | mddev->external_size = 1; | |
b522adcd DW |
5285 | } |
5286 | ||
6791875e N |
5287 | if (!err) { |
5288 | mddev->array_sectors = sectors; | |
2c247c51 CH |
5289 | if (mddev->pers) |
5290 | set_capacity_and_notify(mddev->gendisk, | |
5291 | mddev->array_sectors); | |
cbe6ef1d | 5292 | } |
6791875e N |
5293 | mddev_unlock(mddev); |
5294 | return err ?: len; | |
b522adcd DW |
5295 | } |
5296 | ||
5297 | static struct md_sysfs_entry md_array_size = | |
5298 | __ATTR(array_size, S_IRUGO|S_IWUSR, array_size_show, | |
5299 | array_size_store); | |
e464eafd | 5300 | |
664aed04 AP |
5301 | static ssize_t |
5302 | consistency_policy_show(struct mddev *mddev, char *page) | |
5303 | { | |
5304 | int ret; | |
5305 | ||
5306 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) { | |
5307 | ret = sprintf(page, "journal\n"); | |
5308 | } else if (test_bit(MD_HAS_PPL, &mddev->flags)) { | |
5309 | ret = sprintf(page, "ppl\n"); | |
5310 | } else if (mddev->bitmap) { | |
5311 | ret = sprintf(page, "bitmap\n"); | |
5312 | } else if (mddev->pers) { | |
5313 | if (mddev->pers->sync_request) | |
5314 | ret = sprintf(page, "resync\n"); | |
5315 | else | |
5316 | ret = sprintf(page, "none\n"); | |
5317 | } else { | |
5318 | ret = sprintf(page, "unknown\n"); | |
5319 | } | |
5320 | ||
5321 | return ret; | |
5322 | } | |
5323 | ||
5324 | static ssize_t | |
5325 | consistency_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5326 | { | |
ba903a3e AP |
5327 | int err = 0; |
5328 | ||
664aed04 | 5329 | if (mddev->pers) { |
ba903a3e AP |
5330 | if (mddev->pers->change_consistency_policy) |
5331 | err = mddev->pers->change_consistency_policy(mddev, buf); | |
5332 | else | |
5333 | err = -EBUSY; | |
664aed04 AP |
5334 | } else if (mddev->external && strncmp(buf, "ppl", 3) == 0) { |
5335 | set_bit(MD_HAS_PPL, &mddev->flags); | |
664aed04 | 5336 | } else { |
ba903a3e | 5337 | err = -EINVAL; |
664aed04 | 5338 | } |
ba903a3e AP |
5339 | |
5340 | return err ? err : len; | |
664aed04 AP |
5341 | } |
5342 | ||
5343 | static struct md_sysfs_entry md_consistency_policy = | |
5344 | __ATTR(consistency_policy, S_IRUGO | S_IWUSR, consistency_policy_show, | |
5345 | consistency_policy_store); | |
5346 | ||
9a567843 GJ |
5347 | static ssize_t fail_last_dev_show(struct mddev *mddev, char *page) |
5348 | { | |
5349 | return sprintf(page, "%d\n", mddev->fail_last_dev); | |
5350 | } | |
5351 | ||
5352 | /* | |
5353 | * Setting fail_last_dev to true to allow last device to be forcibly removed | |
5354 | * from RAID1/RAID10. | |
5355 | */ | |
5356 | static ssize_t | |
5357 | fail_last_dev_store(struct mddev *mddev, const char *buf, size_t len) | |
5358 | { | |
5359 | int ret; | |
5360 | bool value; | |
5361 | ||
5362 | ret = kstrtobool(buf, &value); | |
5363 | if (ret) | |
5364 | return ret; | |
5365 | ||
5366 | if (value != mddev->fail_last_dev) | |
5367 | mddev->fail_last_dev = value; | |
5368 | ||
5369 | return len; | |
5370 | } | |
5371 | static struct md_sysfs_entry md_fail_last_dev = | |
5372 | __ATTR(fail_last_dev, S_IRUGO | S_IWUSR, fail_last_dev_show, | |
5373 | fail_last_dev_store); | |
5374 | ||
3938f5fb GJ |
5375 | static ssize_t serialize_policy_show(struct mddev *mddev, char *page) |
5376 | { | |
5377 | if (mddev->pers == NULL || (mddev->pers->level != 1)) | |
5378 | return sprintf(page, "n/a\n"); | |
5379 | else | |
5380 | return sprintf(page, "%d\n", mddev->serialize_policy); | |
5381 | } | |
5382 | ||
5383 | /* | |
5384 | * Setting serialize_policy to true to enforce write IO is not reordered | |
5385 | * for raid1. | |
5386 | */ | |
5387 | static ssize_t | |
5388 | serialize_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5389 | { | |
5390 | int err; | |
5391 | bool value; | |
5392 | ||
5393 | err = kstrtobool(buf, &value); | |
5394 | if (err) | |
5395 | return err; | |
5396 | ||
5397 | if (value == mddev->serialize_policy) | |
5398 | return len; | |
5399 | ||
5400 | err = mddev_lock(mddev); | |
5401 | if (err) | |
5402 | return err; | |
5403 | if (mddev->pers == NULL || (mddev->pers->level != 1)) { | |
5404 | pr_err("md: serialize_policy is only effective for raid1\n"); | |
5405 | err = -EINVAL; | |
5406 | goto unlock; | |
5407 | } | |
5408 | ||
5409 | mddev_suspend(mddev); | |
5410 | if (value) | |
5411 | mddev_create_serial_pool(mddev, NULL, true); | |
5412 | else | |
5413 | mddev_destroy_serial_pool(mddev, NULL, true); | |
5414 | mddev->serialize_policy = value; | |
5415 | mddev_resume(mddev); | |
5416 | unlock: | |
5417 | mddev_unlock(mddev); | |
5418 | return err ?: len; | |
5419 | } | |
5420 | ||
5421 | static struct md_sysfs_entry md_serialize_policy = | |
5422 | __ATTR(serialize_policy, S_IRUGO | S_IWUSR, serialize_policy_show, | |
5423 | serialize_policy_store); | |
5424 | ||
5425 | ||
eae1701f N |
5426 | static struct attribute *md_default_attrs[] = { |
5427 | &md_level.attr, | |
d4dbd025 | 5428 | &md_layout.attr, |
eae1701f | 5429 | &md_raid_disks.attr, |
ec164d07 | 5430 | &md_uuid.attr, |
3b34380a | 5431 | &md_chunk_size.attr, |
a35b0d69 | 5432 | &md_size.attr, |
a94213b1 | 5433 | &md_resync_start.attr, |
8bb93aac | 5434 | &md_metadata.attr, |
6d7ff738 | 5435 | &md_new_device.attr, |
16f17b39 | 5436 | &md_safe_delay.attr, |
9e653b63 | 5437 | &md_array_state.attr, |
08a02ecd | 5438 | &md_reshape_position.attr, |
2c810cdd | 5439 | &md_reshape_direction.attr, |
b522adcd | 5440 | &md_array_size.attr, |
1e50915f | 5441 | &max_corr_read_errors.attr, |
664aed04 | 5442 | &md_consistency_policy.attr, |
9a567843 | 5443 | &md_fail_last_dev.attr, |
3938f5fb | 5444 | &md_serialize_policy.attr, |
411036fa N |
5445 | NULL, |
5446 | }; | |
5447 | ||
51238e7f CH |
5448 | static const struct attribute_group md_default_group = { |
5449 | .attrs = md_default_attrs, | |
5450 | }; | |
5451 | ||
411036fa | 5452 | static struct attribute *md_redundancy_attrs[] = { |
24dd469d | 5453 | &md_scan_mode.attr, |
c4a39551 | 5454 | &md_last_scan_mode.attr, |
9d88883e | 5455 | &md_mismatches.attr, |
88202a0c N |
5456 | &md_sync_min.attr, |
5457 | &md_sync_max.attr, | |
5458 | &md_sync_speed.attr, | |
90b08710 | 5459 | &md_sync_force_parallel.attr, |
88202a0c | 5460 | &md_sync_completed.attr, |
5e96ee65 | 5461 | &md_min_sync.attr, |
c6207277 | 5462 | &md_max_sync.attr, |
e464eafd N |
5463 | &md_suspend_lo.attr, |
5464 | &md_suspend_hi.attr, | |
9b1d1dac | 5465 | &md_bitmap.attr, |
d7f3d291 | 5466 | &md_degraded.attr, |
eae1701f N |
5467 | NULL, |
5468 | }; | |
c32dc040 | 5469 | static const struct attribute_group md_redundancy_group = { |
411036fa N |
5470 | .name = NULL, |
5471 | .attrs = md_redundancy_attrs, | |
5472 | }; | |
5473 | ||
51238e7f CH |
5474 | static const struct attribute_group *md_attr_groups[] = { |
5475 | &md_default_group, | |
5476 | &md_bitmap_group, | |
5477 | NULL, | |
5478 | }; | |
5479 | ||
eae1701f N |
5480 | static ssize_t |
5481 | md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
5482 | { | |
5483 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5484 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5485 | ssize_t rv; |
eae1701f N |
5486 | |
5487 | if (!entry->show) | |
5488 | return -EIO; | |
af8a2434 | 5489 | spin_lock(&all_mddevs_lock); |
12a6caf2 | 5490 | if (!mddev_get(mddev)) { |
af8a2434 N |
5491 | spin_unlock(&all_mddevs_lock); |
5492 | return -EBUSY; | |
5493 | } | |
af8a2434 N |
5494 | spin_unlock(&all_mddevs_lock); |
5495 | ||
b7b17c9b | 5496 | rv = entry->show(mddev, page); |
af8a2434 | 5497 | mddev_put(mddev); |
96de1e66 | 5498 | return rv; |
eae1701f N |
5499 | } |
5500 | ||
5501 | static ssize_t | |
5502 | md_attr_store(struct kobject *kobj, struct attribute *attr, | |
5503 | const char *page, size_t length) | |
5504 | { | |
5505 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5506 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5507 | ssize_t rv; |
eae1701f N |
5508 | |
5509 | if (!entry->store) | |
5510 | return -EIO; | |
67463acb N |
5511 | if (!capable(CAP_SYS_ADMIN)) |
5512 | return -EACCES; | |
af8a2434 | 5513 | spin_lock(&all_mddevs_lock); |
12a6caf2 | 5514 | if (!mddev_get(mddev)) { |
af8a2434 N |
5515 | spin_unlock(&all_mddevs_lock); |
5516 | return -EBUSY; | |
5517 | } | |
af8a2434 | 5518 | spin_unlock(&all_mddevs_lock); |
6791875e | 5519 | rv = entry->store(mddev, page, length); |
af8a2434 | 5520 | mddev_put(mddev); |
96de1e66 | 5521 | return rv; |
eae1701f N |
5522 | } |
5523 | ||
33b614e3 | 5524 | static void md_kobj_release(struct kobject *ko) |
eae1701f | 5525 | { |
fd01b88c | 5526 | struct mddev *mddev = container_of(ko, struct mddev, kobj); |
a21d1504 N |
5527 | |
5528 | if (mddev->sysfs_state) | |
5529 | sysfs_put(mddev->sysfs_state); | |
e1a86dbb JB |
5530 | if (mddev->sysfs_level) |
5531 | sysfs_put(mddev->sysfs_level); | |
5532 | ||
ca39f750 CH |
5533 | del_gendisk(mddev->gendisk); |
5534 | put_disk(mddev->gendisk); | |
eae1701f N |
5535 | } |
5536 | ||
52cf25d0 | 5537 | static const struct sysfs_ops md_sysfs_ops = { |
eae1701f N |
5538 | .show = md_attr_show, |
5539 | .store = md_attr_store, | |
5540 | }; | |
4d72a9de | 5541 | static const struct kobj_type md_ktype = { |
33b614e3 | 5542 | .release = md_kobj_release, |
eae1701f | 5543 | .sysfs_ops = &md_sysfs_ops, |
51238e7f | 5544 | .default_groups = md_attr_groups, |
eae1701f N |
5545 | }; |
5546 | ||
1da177e4 LT |
5547 | int mdp_major = 0; |
5548 | ||
5fd3a17e DW |
5549 | static void mddev_delayed_delete(struct work_struct *ws) |
5550 | { | |
fd01b88c | 5551 | struct mddev *mddev = container_of(ws, struct mddev, del_work); |
5fd3a17e | 5552 | |
5fd3a17e DW |
5553 | kobject_put(&mddev->kobj); |
5554 | } | |
5555 | ||
4ad23a97 N |
5556 | static void no_op(struct percpu_ref *r) {} |
5557 | ||
a415c0f1 N |
5558 | int mddev_init_writes_pending(struct mddev *mddev) |
5559 | { | |
5560 | if (mddev->writes_pending.percpu_count_ptr) | |
5561 | return 0; | |
ddde2af7 RG |
5562 | if (percpu_ref_init(&mddev->writes_pending, no_op, |
5563 | PERCPU_REF_ALLOW_REINIT, GFP_KERNEL) < 0) | |
a415c0f1 N |
5564 | return -ENOMEM; |
5565 | /* We want to start with the refcount at zero */ | |
5566 | percpu_ref_put(&mddev->writes_pending); | |
5567 | return 0; | |
5568 | } | |
5569 | EXPORT_SYMBOL_GPL(mddev_init_writes_pending); | |
5570 | ||
34cb92c0 | 5571 | struct mddev *md_alloc(dev_t dev, char *name) |
1da177e4 | 5572 | { |
039b7225 N |
5573 | /* |
5574 | * If dev is zero, name is the name of a device to allocate with | |
5575 | * an arbitrary minor number. It will be "md_???" | |
5576 | * If dev is non-zero it must be a device number with a MAJOR of | |
5577 | * MD_MAJOR or mdp_major. In this case, if "name" is NULL, then | |
5578 | * the device is being created by opening a node in /dev. | |
5579 | * If "name" is not NULL, the device is being created by | |
5580 | * writing to /sys/module/md_mod/parameters/new_array. | |
5581 | */ | |
48c9c27b | 5582 | static DEFINE_MUTEX(disks_mutex); |
0d809b38 | 5583 | struct mddev *mddev; |
1da177e4 | 5584 | struct gendisk *disk; |
efeb53c0 N |
5585 | int partitioned; |
5586 | int shift; | |
5587 | int unit; | |
0d809b38 | 5588 | int error ; |
efeb53c0 | 5589 | |
0d809b38 CH |
5590 | /* |
5591 | * Wait for any previous instance of this device to be completely | |
5592 | * removed (mddev_delayed_delete). | |
d3374825 | 5593 | */ |
e804ac78 | 5594 | flush_workqueue(md_misc_wq); |
5e8daf90 | 5595 | flush_workqueue(md_rdev_misc_wq); |
d3374825 | 5596 | |
48c9c27b | 5597 | mutex_lock(&disks_mutex); |
0d809b38 CH |
5598 | mddev = mddev_alloc(dev); |
5599 | if (IS_ERR(mddev)) { | |
c57094a6 CH |
5600 | error = PTR_ERR(mddev); |
5601 | goto out_unlock; | |
0d809b38 CH |
5602 | } |
5603 | ||
5604 | partitioned = (MAJOR(mddev->unit) != MD_MAJOR); | |
5605 | shift = partitioned ? MdpMinorShift : 0; | |
5606 | unit = MINOR(mddev->unit) >> shift; | |
efeb53c0 | 5607 | |
039b7225 | 5608 | if (name && !dev) { |
efeb53c0 N |
5609 | /* Need to ensure that 'name' is not a duplicate. |
5610 | */ | |
fd01b88c | 5611 | struct mddev *mddev2; |
efeb53c0 N |
5612 | spin_lock(&all_mddevs_lock); |
5613 | ||
5614 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) | |
5615 | if (mddev2->gendisk && | |
5616 | strcmp(mddev2->gendisk->disk_name, name) == 0) { | |
5617 | spin_unlock(&all_mddevs_lock); | |
0d809b38 | 5618 | error = -EEXIST; |
c57094a6 | 5619 | goto out_free_mddev; |
efeb53c0 N |
5620 | } |
5621 | spin_unlock(&all_mddevs_lock); | |
1da177e4 | 5622 | } |
039b7225 N |
5623 | if (name && dev) |
5624 | /* | |
5625 | * Creating /dev/mdNNN via "newarray", so adjust hold_active. | |
5626 | */ | |
5627 | mddev->hold_active = UNTIL_STOP; | |
8b765398 | 5628 | |
0909dc44 | 5629 | error = -ENOMEM; |
0f1d2e06 CH |
5630 | disk = blk_alloc_disk(NUMA_NO_NODE); |
5631 | if (!disk) | |
c57094a6 | 5632 | goto out_free_mddev; |
409c57f3 | 5633 | |
efeb53c0 | 5634 | disk->major = MAJOR(mddev->unit); |
1da177e4 | 5635 | disk->first_minor = unit << shift; |
0f1d2e06 | 5636 | disk->minors = 1 << shift; |
efeb53c0 N |
5637 | if (name) |
5638 | strcpy(disk->disk_name, name); | |
5639 | else if (partitioned) | |
1da177e4 | 5640 | sprintf(disk->disk_name, "md_d%d", unit); |
ce7b0f46 | 5641 | else |
1da177e4 | 5642 | sprintf(disk->disk_name, "md%d", unit); |
1da177e4 LT |
5643 | disk->fops = &md_fops; |
5644 | disk->private_data = mddev; | |
0f1d2e06 CH |
5645 | |
5646 | mddev->queue = disk->queue; | |
5647 | blk_set_stacking_limits(&mddev->queue->limits); | |
56883a7e | 5648 | blk_queue_write_cache(mddev->queue, true, true); |
a564e23f | 5649 | disk->events |= DISK_EVENT_MEDIA_CHANGE; |
1da177e4 | 5650 | mddev->gendisk = disk; |
9be68dd7 | 5651 | error = add_disk(disk); |
7ad10691 | 5652 | if (error) |
c57094a6 | 5653 | goto out_put_disk; |
b0140891 | 5654 | |
ca39f750 | 5655 | kobject_init(&mddev->kobj, &md_ktype); |
28dec870 | 5656 | error = kobject_add(&mddev->kobj, &disk_to_dev(disk)->kobj, "%s", "md"); |
c57094a6 CH |
5657 | if (error) { |
5658 | /* | |
5659 | * The disk is already live at this point. Clear the hold flag | |
5660 | * and let mddev_put take care of the deletion, as it isn't any | |
5661 | * different from a normal close on last release now. | |
5662 | */ | |
5663 | mddev->hold_active = 0; | |
34cb92c0 CH |
5664 | mutex_unlock(&disks_mutex); |
5665 | mddev_put(mddev); | |
5666 | return ERR_PTR(error); | |
c57094a6 | 5667 | } |
7ad10691 CH |
5668 | |
5669 | kobject_uevent(&mddev->kobj, KOBJ_ADD); | |
5670 | mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state"); | |
5671 | mddev->sysfs_level = sysfs_get_dirent_safe(mddev->kobj.sd, "level"); | |
94f3cd7d | 5672 | mutex_unlock(&disks_mutex); |
34cb92c0 | 5673 | return mddev; |
c57094a6 CH |
5674 | |
5675 | out_put_disk: | |
5676 | put_disk(disk); | |
5677 | out_free_mddev: | |
5678 | mddev_free(mddev); | |
5679 | out_unlock: | |
5680 | mutex_unlock(&disks_mutex); | |
34cb92c0 CH |
5681 | return ERR_PTR(error); |
5682 | } | |
5683 | ||
5684 | static int md_alloc_and_put(dev_t dev, char *name) | |
5685 | { | |
5686 | struct mddev *mddev = md_alloc(dev, name); | |
5687 | ||
5688 | if (IS_ERR(mddev)) | |
5689 | return PTR_ERR(mddev); | |
5690 | mddev_put(mddev); | |
5691 | return 0; | |
efeb53c0 N |
5692 | } |
5693 | ||
28144f99 | 5694 | static void md_probe(dev_t dev) |
efeb53c0 | 5695 | { |
28144f99 CH |
5696 | if (MAJOR(dev) == MD_MAJOR && MINOR(dev) >= 512) |
5697 | return; | |
78b6350d | 5698 | if (create_on_open) |
34cb92c0 | 5699 | md_alloc_and_put(dev, NULL); |
1da177e4 LT |
5700 | } |
5701 | ||
e4dca7b7 | 5702 | static int add_named_array(const char *val, const struct kernel_param *kp) |
efeb53c0 | 5703 | { |
039b7225 N |
5704 | /* |
5705 | * val must be "md_*" or "mdNNN". | |
5706 | * For "md_*" we allocate an array with a large free minor number, and | |
efeb53c0 | 5707 | * set the name to val. val must not already be an active name. |
039b7225 N |
5708 | * For "mdNNN" we allocate an array with the minor number NNN |
5709 | * which must not already be in use. | |
efeb53c0 N |
5710 | */ |
5711 | int len = strlen(val); | |
5712 | char buf[DISK_NAME_LEN]; | |
039b7225 | 5713 | unsigned long devnum; |
efeb53c0 N |
5714 | |
5715 | while (len && val[len-1] == '\n') | |
5716 | len--; | |
5717 | if (len >= DISK_NAME_LEN) | |
5718 | return -E2BIG; | |
92d9aac9 | 5719 | strscpy(buf, val, len+1); |
039b7225 | 5720 | if (strncmp(buf, "md_", 3) == 0) |
34cb92c0 | 5721 | return md_alloc_and_put(0, buf); |
039b7225 N |
5722 | if (strncmp(buf, "md", 2) == 0 && |
5723 | isdigit(buf[2]) && | |
5724 | kstrtoul(buf+2, 10, &devnum) == 0 && | |
5725 | devnum <= MINORMASK) | |
34cb92c0 | 5726 | return md_alloc_and_put(MKDEV(MD_MAJOR, devnum), NULL); |
039b7225 N |
5727 | |
5728 | return -EINVAL; | |
efeb53c0 N |
5729 | } |
5730 | ||
8376d3c1 | 5731 | static void md_safemode_timeout(struct timer_list *t) |
1da177e4 | 5732 | { |
8376d3c1 | 5733 | struct mddev *mddev = from_timer(mddev, t, safemode_timer); |
1da177e4 | 5734 | |
4ad23a97 N |
5735 | mddev->safemode = 1; |
5736 | if (mddev->external) | |
5737 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
5738 | ||
1da177e4 LT |
5739 | md_wakeup_thread(mddev->thread); |
5740 | } | |
5741 | ||
6ff8d8ec | 5742 | static int start_dirty_degraded; |
72adae23 XN |
5743 | static void active_io_release(struct percpu_ref *ref) |
5744 | { | |
5745 | struct mddev *mddev = container_of(ref, struct mddev, active_io); | |
5746 | ||
5747 | wake_up(&mddev->sb_wait); | |
5748 | } | |
1da177e4 | 5749 | |
fd01b88c | 5750 | int md_run(struct mddev *mddev) |
1da177e4 | 5751 | { |
2604b703 | 5752 | int err; |
3cb03002 | 5753 | struct md_rdev *rdev; |
84fc4b56 | 5754 | struct md_personality *pers; |
f51d46d0 | 5755 | bool nowait = true; |
1da177e4 | 5756 | |
a757e64c N |
5757 | if (list_empty(&mddev->disks)) |
5758 | /* cannot run an array with no devices.. */ | |
1da177e4 | 5759 | return -EINVAL; |
1da177e4 LT |
5760 | |
5761 | if (mddev->pers) | |
5762 | return -EBUSY; | |
bb4f1e9d N |
5763 | /* Cannot run until previous stop completes properly */ |
5764 | if (mddev->sysfs_active) | |
5765 | return -EBUSY; | |
b6eb127d | 5766 | |
1da177e4 LT |
5767 | /* |
5768 | * Analyze all RAID superblock(s) | |
5769 | */ | |
1ec4a939 N |
5770 | if (!mddev->raid_disks) { |
5771 | if (!mddev->persistent) | |
5772 | return -EINVAL; | |
6a5cb53a YY |
5773 | err = analyze_sbs(mddev); |
5774 | if (err) | |
5775 | return -EINVAL; | |
1ec4a939 | 5776 | } |
1da177e4 | 5777 | |
d9d166c2 N |
5778 | if (mddev->level != LEVEL_NONE) |
5779 | request_module("md-level-%d", mddev->level); | |
5780 | else if (mddev->clevel[0]) | |
5781 | request_module("md-%s", mddev->clevel); | |
1da177e4 LT |
5782 | |
5783 | /* | |
5784 | * Drop all container device buffers, from now on | |
5785 | * the only valid external interface is through the md | |
5786 | * device. | |
1da177e4 | 5787 | */ |
4b6c1060 | 5788 | mddev->has_superblocks = false; |
dafb20fa | 5789 | rdev_for_each(rdev, mddev) { |
b2d444d7 | 5790 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
5791 | continue; |
5792 | sync_blockdev(rdev->bdev); | |
f98393a6 | 5793 | invalidate_bdev(rdev->bdev); |
f97a5528 YB |
5794 | if (mddev->ro != MD_RDONLY && rdev_read_only(rdev)) { |
5795 | mddev->ro = MD_RDONLY; | |
97b20ef7 N |
5796 | if (mddev->gendisk) |
5797 | set_disk_ro(mddev->gendisk, 1); | |
5798 | } | |
f0d76d70 | 5799 | |
4b6c1060 HM |
5800 | if (rdev->sb_page) |
5801 | mddev->has_superblocks = true; | |
5802 | ||
f0d76d70 N |
5803 | /* perform some consistency tests on the device. |
5804 | * We don't want the data to overlap the metadata, | |
58c0fed4 | 5805 | * Internal Bitmap issues have been handled elsewhere. |
f0d76d70 | 5806 | */ |
a6ff7e08 JB |
5807 | if (rdev->meta_bdev) { |
5808 | /* Nothing to check */; | |
5809 | } else if (rdev->data_offset < rdev->sb_start) { | |
58c0fed4 AN |
5810 | if (mddev->dev_sectors && |
5811 | rdev->data_offset + mddev->dev_sectors | |
0f420358 | 5812 | > rdev->sb_start) { |
9d48739e N |
5813 | pr_warn("md: %s: data overlaps metadata\n", |
5814 | mdname(mddev)); | |
f0d76d70 N |
5815 | return -EINVAL; |
5816 | } | |
5817 | } else { | |
0f420358 | 5818 | if (rdev->sb_start + rdev->sb_size/512 |
f0d76d70 | 5819 | > rdev->data_offset) { |
9d48739e N |
5820 | pr_warn("md: %s: metadata overlaps data\n", |
5821 | mdname(mddev)); | |
f0d76d70 N |
5822 | return -EINVAL; |
5823 | } | |
5824 | } | |
00bcb4ac | 5825 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
568ec936 | 5826 | nowait = nowait && bdev_nowait(rdev->bdev); |
1da177e4 LT |
5827 | } |
5828 | ||
72adae23 XN |
5829 | err = percpu_ref_init(&mddev->active_io, active_io_release, |
5830 | PERCPU_REF_ALLOW_REINIT, GFP_KERNEL); | |
5831 | if (err) | |
5832 | return err; | |
5833 | ||
afeee514 KO |
5834 | if (!bioset_initialized(&mddev->bio_set)) { |
5835 | err = bioset_init(&mddev->bio_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5836 | if (err) | |
72adae23 | 5837 | goto exit_active_io; |
10273170 | 5838 | } |
afeee514 KO |
5839 | if (!bioset_initialized(&mddev->sync_set)) { |
5840 | err = bioset_init(&mddev->sync_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5841 | if (err) | |
10764815 GJ |
5842 | goto exit_bio_set; |
5843 | } | |
a167f663 | 5844 | |
1da177e4 | 5845 | spin_lock(&pers_lock); |
d9d166c2 | 5846 | pers = find_pers(mddev->level, mddev->clevel); |
2604b703 | 5847 | if (!pers || !try_module_get(pers->owner)) { |
1da177e4 | 5848 | spin_unlock(&pers_lock); |
d9d166c2 | 5849 | if (mddev->level != LEVEL_NONE) |
9d48739e N |
5850 | pr_warn("md: personality for level %d is not loaded!\n", |
5851 | mddev->level); | |
d9d166c2 | 5852 | else |
9d48739e N |
5853 | pr_warn("md: personality for level %s is not loaded!\n", |
5854 | mddev->clevel); | |
bfc9dfdc SL |
5855 | err = -EINVAL; |
5856 | goto abort; | |
1da177e4 | 5857 | } |
1da177e4 | 5858 | spin_unlock(&pers_lock); |
34817e8c N |
5859 | if (mddev->level != pers->level) { |
5860 | mddev->level = pers->level; | |
5861 | mddev->new_level = pers->level; | |
5862 | } | |
92d9aac9 | 5863 | strscpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
1da177e4 | 5864 | |
f6705578 | 5865 | if (mddev->reshape_position != MaxSector && |
63c70c4f | 5866 | pers->start_reshape == NULL) { |
f6705578 | 5867 | /* This personality cannot handle reshaping... */ |
f6705578 | 5868 | module_put(pers->owner); |
bfc9dfdc SL |
5869 | err = -EINVAL; |
5870 | goto abort; | |
f6705578 N |
5871 | } |
5872 | ||
7dd5e7c3 N |
5873 | if (pers->sync_request) { |
5874 | /* Warn if this is a potentially silly | |
5875 | * configuration. | |
5876 | */ | |
3cb03002 | 5877 | struct md_rdev *rdev2; |
7dd5e7c3 | 5878 | int warned = 0; |
159ec1fc | 5879 | |
dafb20fa N |
5880 | rdev_for_each(rdev, mddev) |
5881 | rdev_for_each(rdev2, mddev) { | |
7dd5e7c3 | 5882 | if (rdev < rdev2 && |
61a27e1f CH |
5883 | rdev->bdev->bd_disk == |
5884 | rdev2->bdev->bd_disk) { | |
913cce5a | 5885 | pr_warn("%s: WARNING: %pg appears to be on the same physical disk as %pg.\n", |
9d48739e | 5886 | mdname(mddev), |
913cce5a CH |
5887 | rdev->bdev, |
5888 | rdev2->bdev); | |
7dd5e7c3 N |
5889 | warned = 1; |
5890 | } | |
5891 | } | |
159ec1fc | 5892 | |
7dd5e7c3 | 5893 | if (warned) |
9d48739e | 5894 | pr_warn("True protection against single-disk failure might be compromised.\n"); |
7dd5e7c3 N |
5895 | } |
5896 | ||
657390d2 | 5897 | mddev->recovery = 0; |
58c0fed4 AN |
5898 | /* may be over-ridden by personality */ |
5899 | mddev->resync_max_sectors = mddev->dev_sectors; | |
5900 | ||
6ff8d8ec | 5901 | mddev->ok_start_degraded = start_dirty_degraded; |
1da177e4 | 5902 | |
f97a5528 YB |
5903 | if (start_readonly && md_is_rdwr(mddev)) |
5904 | mddev->ro = MD_AUTO_READ; /* read-only, but switch on first write */ | |
f91de92e | 5905 | |
36d091f4 | 5906 | err = pers->run(mddev); |
13e53df3 | 5907 | if (err) |
9d48739e | 5908 | pr_warn("md: pers->run() failed ...\n"); |
36d091f4 | 5909 | else if (pers->size(mddev, 0, 0) < mddev->array_sectors) { |
9d48739e N |
5910 | WARN_ONCE(!mddev->external_size, |
5911 | "%s: default size too small, but 'external_size' not in effect?\n", | |
5912 | __func__); | |
5913 | pr_warn("md: invalid array_size %llu > default size %llu\n", | |
5914 | (unsigned long long)mddev->array_sectors / 2, | |
5915 | (unsigned long long)pers->size(mddev, 0, 0) / 2); | |
b522adcd | 5916 | err = -EINVAL; |
b522adcd | 5917 | } |
36d091f4 | 5918 | if (err == 0 && pers->sync_request && |
ef99bf48 | 5919 | (mddev->bitmap_info.file || mddev->bitmap_info.offset)) { |
f9209a32 GR |
5920 | struct bitmap *bitmap; |
5921 | ||
e64e4018 | 5922 | bitmap = md_bitmap_create(mddev, -1); |
f9209a32 GR |
5923 | if (IS_ERR(bitmap)) { |
5924 | err = PTR_ERR(bitmap); | |
9d48739e N |
5925 | pr_warn("%s: failed to create bitmap (%d)\n", |
5926 | mdname(mddev), err); | |
f9209a32 GR |
5927 | } else |
5928 | mddev->bitmap = bitmap; | |
5929 | ||
b15c2e57 | 5930 | } |
d494549a GJ |
5931 | if (err) |
5932 | goto bitmap_abort; | |
3e148a32 GJ |
5933 | |
5934 | if (mddev->bitmap_info.max_write_behind > 0) { | |
3e173ab5 | 5935 | bool create_pool = false; |
3e148a32 GJ |
5936 | |
5937 | rdev_for_each(rdev, mddev) { | |
5938 | if (test_bit(WriteMostly, &rdev->flags) && | |
404659cf | 5939 | rdev_init_serial(rdev)) |
3e173ab5 | 5940 | create_pool = true; |
3e148a32 | 5941 | } |
3e173ab5 | 5942 | if (create_pool && mddev->serial_info_pool == NULL) { |
404659cf GJ |
5943 | mddev->serial_info_pool = |
5944 | mempool_create_kmalloc_pool(NR_SERIAL_INFOS, | |
5945 | sizeof(struct serial_info)); | |
5946 | if (!mddev->serial_info_pool) { | |
3e148a32 | 5947 | err = -ENOMEM; |
d494549a | 5948 | goto bitmap_abort; |
3e148a32 GJ |
5949 | } |
5950 | } | |
5951 | } | |
5952 | ||
5c675f83 | 5953 | if (mddev->queue) { |
bb086a89 SL |
5954 | bool nonrot = true; |
5955 | ||
5956 | rdev_for_each(rdev, mddev) { | |
10f0d2a5 | 5957 | if (rdev->raid_disk >= 0 && !bdev_nonrot(rdev->bdev)) { |
bb086a89 SL |
5958 | nonrot = false; |
5959 | break; | |
5960 | } | |
5961 | } | |
5962 | if (mddev->degraded) | |
5963 | nonrot = false; | |
5964 | if (nonrot) | |
8b904b5b | 5965 | blk_queue_flag_set(QUEUE_FLAG_NONROT, mddev->queue); |
bb086a89 | 5966 | else |
8b904b5b | 5967 | blk_queue_flag_clear(QUEUE_FLAG_NONROT, mddev->queue); |
10764815 | 5968 | blk_queue_flag_set(QUEUE_FLAG_IO_STAT, mddev->queue); |
0f9650bd SL |
5969 | |
5970 | /* Set the NOWAIT flags if all underlying devices support it */ | |
5971 | if (nowait) | |
5972 | blk_queue_flag_set(QUEUE_FLAG_NOWAIT, mddev->queue); | |
5c675f83 | 5973 | } |
36d091f4 | 5974 | if (pers->sync_request) { |
00bcb4ac N |
5975 | if (mddev->kobj.sd && |
5976 | sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
5977 | pr_warn("md: cannot register extra attributes for %s\n", |
5978 | mdname(mddev)); | |
00bcb4ac | 5979 | mddev->sysfs_action = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_action"); |
e8efa9b8 JB |
5980 | mddev->sysfs_completed = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_completed"); |
5981 | mddev->sysfs_degraded = sysfs_get_dirent_safe(mddev->kobj.sd, "degraded"); | |
f97a5528 YB |
5982 | } else if (mddev->ro == MD_AUTO_READ) |
5983 | mddev->ro = MD_RDWR; | |
fd9d49ca | 5984 | |
1e50915f RB |
5985 | atomic_set(&mddev->max_corr_read_errors, |
5986 | MD_DEFAULT_MAX_CORRECTED_READ_ERRORS); | |
1da177e4 | 5987 | mddev->safemode = 0; |
28c1b9fd GR |
5988 | if (mddev_is_clustered(mddev)) |
5989 | mddev->safemode_delay = 0; | |
5990 | else | |
7c9d5c54 | 5991 | mddev->safemode_delay = DEFAULT_SAFEMODE_DELAY; |
1da177e4 | 5992 | mddev->in_sync = 1; |
0ca69886 | 5993 | smp_wmb(); |
36d091f4 N |
5994 | spin_lock(&mddev->lock); |
5995 | mddev->pers = pers; | |
36d091f4 | 5996 | spin_unlock(&mddev->lock); |
dafb20fa | 5997 | rdev_for_each(rdev, mddev) |
36fad858 | 5998 | if (rdev->raid_disk >= 0) |
e5b521ee | 5999 | sysfs_link_rdev(mddev, rdev); /* failure here is OK */ |
f72ffdd6 | 6000 | |
f97a5528 | 6001 | if (mddev->degraded && md_is_rdwr(mddev)) |
a4a3d26d N |
6002 | /* This ensures that recovering status is reported immediately |
6003 | * via sysfs - until a lack of spares is confirmed. | |
6004 | */ | |
6005 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
1da177e4 | 6006 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f72ffdd6 | 6007 | |
2953079c | 6008 | if (mddev->sb_flags) |
850b2b42 | 6009 | md_update_sb(mddev, 0); |
1da177e4 | 6010 | |
54679486 | 6011 | md_new_event(); |
1da177e4 | 6012 | return 0; |
b126194c | 6013 | |
d494549a GJ |
6014 | bitmap_abort: |
6015 | mddev_detach(mddev); | |
6016 | if (mddev->private) | |
6017 | pers->free(mddev, mddev->private); | |
6018 | mddev->private = NULL; | |
6019 | module_put(pers->owner); | |
6020 | md_bitmap_destroy(mddev); | |
b126194c | 6021 | abort: |
4bc034d3 | 6022 | bioset_exit(&mddev->sync_set); |
10764815 GJ |
6023 | exit_bio_set: |
6024 | bioset_exit(&mddev->bio_set); | |
72adae23 XN |
6025 | exit_active_io: |
6026 | percpu_ref_exit(&mddev->active_io); | |
b126194c | 6027 | return err; |
1da177e4 | 6028 | } |
390ee602 | 6029 | EXPORT_SYMBOL_GPL(md_run); |
1da177e4 | 6030 | |
7e0adbfc | 6031 | int do_md_run(struct mddev *mddev) |
fe60b014 N |
6032 | { |
6033 | int err; | |
6034 | ||
9d4b45d6 | 6035 | set_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
6036 | err = md_run(mddev); |
6037 | if (err) | |
6038 | goto out; | |
e64e4018 | 6039 | err = md_bitmap_load(mddev); |
69e51b44 | 6040 | if (err) { |
e64e4018 | 6041 | md_bitmap_destroy(mddev); |
69e51b44 N |
6042 | goto out; |
6043 | } | |
0fd018af | 6044 | |
28c1b9fd GR |
6045 | if (mddev_is_clustered(mddev)) |
6046 | md_allow_write(mddev); | |
6047 | ||
d5d885fd SL |
6048 | /* run start up tasks that require md_thread */ |
6049 | md_start(mddev); | |
6050 | ||
0fd018af JB |
6051 | md_wakeup_thread(mddev->thread); |
6052 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
6053 | ||
2c247c51 | 6054 | set_capacity_and_notify(mddev->gendisk, mddev->array_sectors); |
9d4b45d6 | 6055 | clear_bit(MD_NOT_READY, &mddev->flags); |
f0b4f7e2 | 6056 | mddev->changed = 1; |
fe60b014 | 6057 | kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); |
9d4b45d6 N |
6058 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6059 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
e1a86dbb | 6060 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
fe60b014 | 6061 | out: |
9d4b45d6 | 6062 | clear_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
6063 | return err; |
6064 | } | |
6065 | ||
d5d885fd SL |
6066 | int md_start(struct mddev *mddev) |
6067 | { | |
6068 | int ret = 0; | |
6069 | ||
6070 | if (mddev->pers->start) { | |
6071 | set_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
6072 | md_wakeup_thread(mddev->thread); | |
6073 | ret = mddev->pers->start(mddev); | |
6074 | clear_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
6075 | md_wakeup_thread(mddev->sync_thread); | |
6076 | } | |
6077 | return ret; | |
6078 | } | |
6079 | EXPORT_SYMBOL_GPL(md_start); | |
6080 | ||
fd01b88c | 6081 | static int restart_array(struct mddev *mddev) |
1da177e4 LT |
6082 | { |
6083 | struct gendisk *disk = mddev->gendisk; | |
97b20ef7 N |
6084 | struct md_rdev *rdev; |
6085 | bool has_journal = false; | |
6086 | bool has_readonly = false; | |
1da177e4 | 6087 | |
80fab1d7 | 6088 | /* Complain if it has no devices */ |
1da177e4 | 6089 | if (list_empty(&mddev->disks)) |
80fab1d7 AN |
6090 | return -ENXIO; |
6091 | if (!mddev->pers) | |
6092 | return -EINVAL; | |
f97a5528 | 6093 | if (md_is_rdwr(mddev)) |
80fab1d7 | 6094 | return -EBUSY; |
339421de | 6095 | |
97b20ef7 N |
6096 | rcu_read_lock(); |
6097 | rdev_for_each_rcu(rdev, mddev) { | |
6098 | if (test_bit(Journal, &rdev->flags) && | |
6099 | !test_bit(Faulty, &rdev->flags)) | |
6100 | has_journal = true; | |
a42e0d70 | 6101 | if (rdev_read_only(rdev)) |
97b20ef7 N |
6102 | has_readonly = true; |
6103 | } | |
6104 | rcu_read_unlock(); | |
6105 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags) && !has_journal) | |
339421de | 6106 | /* Don't restart rw with journal missing/faulty */ |
339421de | 6107 | return -EINVAL; |
97b20ef7 N |
6108 | if (has_readonly) |
6109 | return -EROFS; | |
339421de | 6110 | |
80fab1d7 | 6111 | mddev->safemode = 0; |
f97a5528 | 6112 | mddev->ro = MD_RDWR; |
80fab1d7 | 6113 | set_disk_ro(disk, 0); |
9d48739e | 6114 | pr_debug("md: %s switched to read-write mode.\n", mdname(mddev)); |
80fab1d7 AN |
6115 | /* Kick recovery or resync if necessary */ |
6116 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6117 | md_wakeup_thread(mddev->thread); | |
6118 | md_wakeup_thread(mddev->sync_thread); | |
00bcb4ac | 6119 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
80fab1d7 | 6120 | return 0; |
1da177e4 LT |
6121 | } |
6122 | ||
fd01b88c | 6123 | static void md_clean(struct mddev *mddev) |
6177b472 N |
6124 | { |
6125 | mddev->array_sectors = 0; | |
6126 | mddev->external_size = 0; | |
6127 | mddev->dev_sectors = 0; | |
6128 | mddev->raid_disks = 0; | |
6129 | mddev->recovery_cp = 0; | |
6130 | mddev->resync_min = 0; | |
6131 | mddev->resync_max = MaxSector; | |
6132 | mddev->reshape_position = MaxSector; | |
6133 | mddev->external = 0; | |
6134 | mddev->persistent = 0; | |
6135 | mddev->level = LEVEL_NONE; | |
6136 | mddev->clevel[0] = 0; | |
6137 | mddev->flags = 0; | |
2953079c | 6138 | mddev->sb_flags = 0; |
f97a5528 | 6139 | mddev->ro = MD_RDWR; |
6177b472 N |
6140 | mddev->metadata_type[0] = 0; |
6141 | mddev->chunk_sectors = 0; | |
6142 | mddev->ctime = mddev->utime = 0; | |
6143 | mddev->layout = 0; | |
6144 | mddev->max_disks = 0; | |
6145 | mddev->events = 0; | |
a8707c08 | 6146 | mddev->can_decrease_events = 0; |
6177b472 | 6147 | mddev->delta_disks = 0; |
2c810cdd | 6148 | mddev->reshape_backwards = 0; |
6177b472 N |
6149 | mddev->new_level = LEVEL_NONE; |
6150 | mddev->new_layout = 0; | |
6151 | mddev->new_chunk_sectors = 0; | |
ed821cf8 | 6152 | mddev->curr_resync = MD_RESYNC_NONE; |
7f7583d4 | 6153 | atomic64_set(&mddev->resync_mismatches, 0); |
6177b472 N |
6154 | mddev->suspend_lo = mddev->suspend_hi = 0; |
6155 | mddev->sync_speed_min = mddev->sync_speed_max = 0; | |
6156 | mddev->recovery = 0; | |
6157 | mddev->in_sync = 0; | |
f0b4f7e2 | 6158 | mddev->changed = 0; |
6177b472 | 6159 | mddev->degraded = 0; |
6177b472 | 6160 | mddev->safemode = 0; |
bd691922 | 6161 | mddev->private = NULL; |
c20c33f0 | 6162 | mddev->cluster_info = NULL; |
6177b472 N |
6163 | mddev->bitmap_info.offset = 0; |
6164 | mddev->bitmap_info.default_offset = 0; | |
6409bb05 | 6165 | mddev->bitmap_info.default_space = 0; |
6177b472 N |
6166 | mddev->bitmap_info.chunksize = 0; |
6167 | mddev->bitmap_info.daemon_sleep = 0; | |
6168 | mddev->bitmap_info.max_write_behind = 0; | |
c20c33f0 | 6169 | mddev->bitmap_info.nodes = 0; |
6177b472 N |
6170 | } |
6171 | ||
fd01b88c | 6172 | static void __md_stop_writes(struct mddev *mddev) |
a047e125 | 6173 | { |
6b6204ee | 6174 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
21e0958e GJ |
6175 | if (work_pending(&mddev->del_work)) |
6176 | flush_workqueue(md_misc_wq); | |
a047e125 | 6177 | if (mddev->sync_thread) { |
a047e125 | 6178 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
9dfbdafd | 6179 | md_unregister_thread(&mddev->sync_thread); |
d0a18034 | 6180 | md_reap_sync_thread(mddev); |
a047e125 N |
6181 | } |
6182 | ||
6183 | del_timer_sync(&mddev->safemode_timer); | |
6184 | ||
034e33f5 SL |
6185 | if (mddev->pers && mddev->pers->quiesce) { |
6186 | mddev->pers->quiesce(mddev, 1); | |
6187 | mddev->pers->quiesce(mddev, 0); | |
6188 | } | |
e64e4018 | 6189 | md_bitmap_flush(mddev); |
a047e125 | 6190 | |
f97a5528 | 6191 | if (md_is_rdwr(mddev) && |
28c1b9fd | 6192 | ((!mddev->in_sync && !mddev_is_clustered(mddev)) || |
2953079c | 6193 | mddev->sb_flags)) { |
a047e125 | 6194 | /* mark array as shutdown cleanly */ |
28c1b9fd GR |
6195 | if (!mddev_is_clustered(mddev)) |
6196 | mddev->in_sync = 1; | |
a047e125 N |
6197 | md_update_sb(mddev, 1); |
6198 | } | |
69b00b5b GJ |
6199 | /* disable policy to guarantee rdevs free resources for serialization */ |
6200 | mddev->serialize_policy = 0; | |
6201 | mddev_destroy_serial_pool(mddev, NULL, true); | |
a047e125 | 6202 | } |
defad61a | 6203 | |
fd01b88c | 6204 | void md_stop_writes(struct mddev *mddev) |
defad61a | 6205 | { |
29f097c4 | 6206 | mddev_lock_nointr(mddev); |
defad61a N |
6207 | __md_stop_writes(mddev); |
6208 | mddev_unlock(mddev); | |
6209 | } | |
390ee602 | 6210 | EXPORT_SYMBOL_GPL(md_stop_writes); |
a047e125 | 6211 | |
5aa61f42 N |
6212 | static void mddev_detach(struct mddev *mddev) |
6213 | { | |
e64e4018 | 6214 | md_bitmap_wait_behind_writes(mddev); |
d1932913 | 6215 | if (mddev->pers && mddev->pers->quiesce && !is_md_suspended(mddev)) { |
5aa61f42 N |
6216 | mddev->pers->quiesce(mddev, 1); |
6217 | mddev->pers->quiesce(mddev, 0); | |
6218 | } | |
6219 | md_unregister_thread(&mddev->thread); | |
6220 | if (mddev->queue) | |
6221 | blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ | |
6222 | } | |
6223 | ||
5eff3c43 | 6224 | static void __md_stop(struct mddev *mddev) |
6177b472 | 6225 | { |
36d091f4 | 6226 | struct md_personality *pers = mddev->pers; |
1d258758 | 6227 | md_bitmap_destroy(mddev); |
5aa61f42 | 6228 | mddev_detach(mddev); |
ee5d004f | 6229 | /* Ensure ->event_work is done */ |
21e0958e GJ |
6230 | if (mddev->event_work.func) |
6231 | flush_workqueue(md_misc_wq); | |
36d091f4 | 6232 | spin_lock(&mddev->lock); |
6177b472 | 6233 | mddev->pers = NULL; |
36d091f4 | 6234 | spin_unlock(&mddev->lock); |
07641b5f | 6235 | if (mddev->private) |
6236 | pers->free(mddev, mddev->private); | |
bd691922 | 6237 | mddev->private = NULL; |
36d091f4 N |
6238 | if (pers->sync_request && mddev->to_remove == NULL) |
6239 | mddev->to_remove = &md_redundancy_group; | |
6240 | module_put(pers->owner); | |
cca9cf90 | 6241 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
3e453522 | 6242 | |
3e453522 XN |
6243 | percpu_ref_exit(&mddev->active_io); |
6244 | bioset_exit(&mddev->bio_set); | |
6245 | bioset_exit(&mddev->sync_set); | |
6aaa58c9 JW |
6246 | } |
6247 | ||
6248 | void md_stop(struct mddev *mddev) | |
6249 | { | |
6250 | /* stop the array and free an attached data structures. | |
6251 | * This is called from dm-raid | |
6252 | */ | |
0dd84b31 | 6253 | __md_stop_writes(mddev); |
6aaa58c9 | 6254 | __md_stop(mddev); |
433279be | 6255 | percpu_ref_exit(&mddev->writes_pending); |
5eff3c43 N |
6256 | } |
6257 | ||
390ee602 | 6258 | EXPORT_SYMBOL_GPL(md_stop); |
6177b472 | 6259 | |
a05b7ea0 | 6260 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) |
a4bd82d0 N |
6261 | { |
6262 | int err = 0; | |
30b8feb7 N |
6263 | int did_freeze = 0; |
6264 | ||
6265 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6266 | did_freeze = 1; | |
6267 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6268 | md_wakeup_thread(mddev->thread); | |
6269 | } | |
f851b60d | 6270 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6271 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6272 | if (mddev->sync_thread) |
30b8feb7 N |
6273 | /* Thread might be blocked waiting for metadata update |
6274 | * which will now never happen */ | |
6275 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6276 | |
2953079c | 6277 | if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
88724bfa | 6278 | return -EBUSY; |
30b8feb7 | 6279 | mddev_unlock(mddev); |
f851b60d N |
6280 | wait_event(resync_wait, !test_bit(MD_RECOVERY_RUNNING, |
6281 | &mddev->recovery)); | |
88724bfa | 6282 | wait_event(mddev->sb_wait, |
2953079c | 6283 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
30b8feb7 N |
6284 | mddev_lock_nointr(mddev); |
6285 | ||
a4bd82d0 | 6286 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6287 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 | 6288 | mddev->sync_thread || |
af8d8e6f | 6289 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6290 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
30b8feb7 N |
6291 | if (did_freeze) { |
6292 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6293 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6294 | md_wakeup_thread(mddev->thread); |
6295 | } | |
a4bd82d0 N |
6296 | err = -EBUSY; |
6297 | goto out; | |
6298 | } | |
6299 | if (mddev->pers) { | |
defad61a | 6300 | __md_stop_writes(mddev); |
a4bd82d0 N |
6301 | |
6302 | err = -ENXIO; | |
f97a5528 | 6303 | if (mddev->ro == MD_RDONLY) |
a4bd82d0 | 6304 | goto out; |
f97a5528 | 6305 | mddev->ro = MD_RDONLY; |
a4bd82d0 N |
6306 | set_disk_ro(mddev->gendisk, 1); |
6307 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d N |
6308 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
6309 | md_wakeup_thread(mddev->thread); | |
00bcb4ac | 6310 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
30b8feb7 | 6311 | err = 0; |
a4bd82d0 N |
6312 | } |
6313 | out: | |
6314 | mutex_unlock(&mddev->open_mutex); | |
6315 | return err; | |
6316 | } | |
6317 | ||
9e653b63 N |
6318 | /* mode: |
6319 | * 0 - completely stop and dis-assemble array | |
9e653b63 N |
6320 | * 2 - stop but do not disassemble array |
6321 | */ | |
f72ffdd6 | 6322 | static int do_md_stop(struct mddev *mddev, int mode, |
a05b7ea0 | 6323 | struct block_device *bdev) |
1da177e4 | 6324 | { |
1da177e4 | 6325 | struct gendisk *disk = mddev->gendisk; |
3cb03002 | 6326 | struct md_rdev *rdev; |
30b8feb7 N |
6327 | int did_freeze = 0; |
6328 | ||
6329 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6330 | did_freeze = 1; | |
6331 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6332 | md_wakeup_thread(mddev->thread); | |
6333 | } | |
f851b60d | 6334 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6335 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6336 | if (mddev->sync_thread) |
30b8feb7 N |
6337 | /* Thread might be blocked waiting for metadata update |
6338 | * which will now never happen */ | |
6339 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6340 | |
30b8feb7 | 6341 | mddev_unlock(mddev); |
f851b60d N |
6342 | wait_event(resync_wait, (mddev->sync_thread == NULL && |
6343 | !test_bit(MD_RECOVERY_RUNNING, | |
6344 | &mddev->recovery))); | |
30b8feb7 | 6345 | mddev_lock_nointr(mddev); |
1da177e4 | 6346 | |
c8c00a69 | 6347 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6348 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 N |
6349 | mddev->sysfs_active || |
6350 | mddev->sync_thread || | |
af8d8e6f | 6351 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6352 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
6e17b027 | 6353 | mutex_unlock(&mddev->open_mutex); |
30b8feb7 N |
6354 | if (did_freeze) { |
6355 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6356 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6357 | md_wakeup_thread(mddev->thread); |
6358 | } | |
260fa034 N |
6359 | return -EBUSY; |
6360 | } | |
6e17b027 | 6361 | if (mddev->pers) { |
f97a5528 | 6362 | if (!md_is_rdwr(mddev)) |
a4bd82d0 | 6363 | set_disk_ro(disk, 0); |
409c57f3 | 6364 | |
defad61a | 6365 | __md_stop_writes(mddev); |
5eff3c43 | 6366 | __md_stop(mddev); |
6177b472 | 6367 | |
a4bd82d0 | 6368 | /* tell userspace to handle 'inactive' */ |
00bcb4ac | 6369 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0d4ca600 | 6370 | |
dafb20fa | 6371 | rdev_for_each(rdev, mddev) |
36fad858 NK |
6372 | if (rdev->raid_disk >= 0) |
6373 | sysfs_unlink_rdev(mddev, rdev); | |
c4647292 | 6374 | |
2c247c51 | 6375 | set_capacity_and_notify(disk, 0); |
6e17b027 | 6376 | mutex_unlock(&mddev->open_mutex); |
f0b4f7e2 | 6377 | mddev->changed = 1; |
0d4ca600 | 6378 | |
f97a5528 YB |
6379 | if (!md_is_rdwr(mddev)) |
6380 | mddev->ro = MD_RDWR; | |
6e17b027 N |
6381 | } else |
6382 | mutex_unlock(&mddev->open_mutex); | |
1da177e4 LT |
6383 | /* |
6384 | * Free resources if final stop | |
6385 | */ | |
9e653b63 | 6386 | if (mode == 0) { |
9d48739e | 6387 | pr_info("md: %s stopped.\n", mdname(mddev)); |
1da177e4 | 6388 | |
c3d9714e | 6389 | if (mddev->bitmap_info.file) { |
4af1a041 N |
6390 | struct file *f = mddev->bitmap_info.file; |
6391 | spin_lock(&mddev->lock); | |
c3d9714e | 6392 | mddev->bitmap_info.file = NULL; |
4af1a041 N |
6393 | spin_unlock(&mddev->lock); |
6394 | fput(f); | |
978f946b | 6395 | } |
c3d9714e | 6396 | mddev->bitmap_info.offset = 0; |
978f946b | 6397 | |
1da177e4 LT |
6398 | export_array(mddev); |
6399 | ||
6177b472 | 6400 | md_clean(mddev); |
efeb53c0 N |
6401 | if (mddev->hold_active == UNTIL_STOP) |
6402 | mddev->hold_active = 0; | |
a4bd82d0 | 6403 | } |
54679486 | 6404 | md_new_event(); |
00bcb4ac | 6405 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6e17b027 | 6406 | return 0; |
1da177e4 LT |
6407 | } |
6408 | ||
fdee8ae4 | 6409 | #ifndef MODULE |
fd01b88c | 6410 | static void autorun_array(struct mddev *mddev) |
1da177e4 | 6411 | { |
3cb03002 | 6412 | struct md_rdev *rdev; |
1da177e4 LT |
6413 | int err; |
6414 | ||
a757e64c | 6415 | if (list_empty(&mddev->disks)) |
1da177e4 | 6416 | return; |
1da177e4 | 6417 | |
9d48739e | 6418 | pr_info("md: running: "); |
1da177e4 | 6419 | |
dafb20fa | 6420 | rdev_for_each(rdev, mddev) { |
913cce5a | 6421 | pr_cont("<%pg>", rdev->bdev); |
1da177e4 | 6422 | } |
9d48739e | 6423 | pr_cont("\n"); |
1da177e4 | 6424 | |
d710e138 | 6425 | err = do_md_run(mddev); |
1da177e4 | 6426 | if (err) { |
9d48739e | 6427 | pr_warn("md: do_md_run() returned %d\n", err); |
a05b7ea0 | 6428 | do_md_stop(mddev, 0, NULL); |
1da177e4 LT |
6429 | } |
6430 | } | |
6431 | ||
6432 | /* | |
6433 | * lets try to run arrays based on all disks that have arrived | |
6434 | * until now. (those are in pending_raid_disks) | |
6435 | * | |
6436 | * the method: pick the first pending disk, collect all disks with | |
6437 | * the same UUID, remove all from the pending list and put them into | |
6438 | * the 'same_array' list. Then order this list based on superblock | |
6439 | * update time (freshest comes first), kick out 'old' disks and | |
6440 | * compare superblocks. If everything's fine then run it. | |
6441 | * | |
6442 | * If "unit" is allocated, then bump its reference count | |
6443 | */ | |
6444 | static void autorun_devices(int part) | |
6445 | { | |
3cb03002 | 6446 | struct md_rdev *rdev0, *rdev, *tmp; |
fd01b88c | 6447 | struct mddev *mddev; |
1da177e4 | 6448 | |
9d48739e | 6449 | pr_info("md: autorun ...\n"); |
1da177e4 | 6450 | while (!list_empty(&pending_raid_disks)) { |
e8703fe1 | 6451 | int unit; |
1da177e4 | 6452 | dev_t dev; |
ad01c9e3 | 6453 | LIST_HEAD(candidates); |
1da177e4 | 6454 | rdev0 = list_entry(pending_raid_disks.next, |
3cb03002 | 6455 | struct md_rdev, same_set); |
1da177e4 | 6456 | |
913cce5a | 6457 | pr_debug("md: considering %pg ...\n", rdev0->bdev); |
1da177e4 | 6458 | INIT_LIST_HEAD(&candidates); |
159ec1fc | 6459 | rdev_for_each_list(rdev, tmp, &pending_raid_disks) |
1da177e4 | 6460 | if (super_90_load(rdev, rdev0, 0) >= 0) { |
913cce5a CH |
6461 | pr_debug("md: adding %pg ...\n", |
6462 | rdev->bdev); | |
1da177e4 LT |
6463 | list_move(&rdev->same_set, &candidates); |
6464 | } | |
6465 | /* | |
6466 | * now we have a set of devices, with all of them having | |
6467 | * mostly sane superblocks. It's time to allocate the | |
6468 | * mddev. | |
6469 | */ | |
e8703fe1 N |
6470 | if (part) { |
6471 | dev = MKDEV(mdp_major, | |
6472 | rdev0->preferred_minor << MdpMinorShift); | |
6473 | unit = MINOR(dev) >> MdpMinorShift; | |
6474 | } else { | |
6475 | dev = MKDEV(MD_MAJOR, rdev0->preferred_minor); | |
6476 | unit = MINOR(dev); | |
6477 | } | |
6478 | if (rdev0->preferred_minor != unit) { | |
913cce5a CH |
6479 | pr_warn("md: unit number in %pg is bad: %d\n", |
6480 | rdev0->bdev, rdev0->preferred_minor); | |
1da177e4 LT |
6481 | break; |
6482 | } | |
1da177e4 | 6483 | |
34cb92c0 CH |
6484 | mddev = md_alloc(dev, NULL); |
6485 | if (IS_ERR(mddev)) | |
1da177e4 | 6486 | break; |
65aa97c4 | 6487 | |
f72ffdd6 | 6488 | if (mddev_lock(mddev)) |
9d48739e | 6489 | pr_warn("md: %s locked, cannot run\n", mdname(mddev)); |
1da177e4 LT |
6490 | else if (mddev->raid_disks || mddev->major_version |
6491 | || !list_empty(&mddev->disks)) { | |
913cce5a CH |
6492 | pr_warn("md: %s already running, cannot run %pg\n", |
6493 | mdname(mddev), rdev0->bdev); | |
1da177e4 LT |
6494 | mddev_unlock(mddev); |
6495 | } else { | |
9d48739e | 6496 | pr_debug("md: created %s\n", mdname(mddev)); |
1ec4a939 | 6497 | mddev->persistent = 1; |
159ec1fc | 6498 | rdev_for_each_list(rdev, tmp, &candidates) { |
1da177e4 LT |
6499 | list_del_init(&rdev->same_set); |
6500 | if (bind_rdev_to_array(rdev, mddev)) | |
6501 | export_rdev(rdev); | |
6502 | } | |
6503 | autorun_array(mddev); | |
6504 | mddev_unlock(mddev); | |
6505 | } | |
6506 | /* on success, candidates will be empty, on error | |
6507 | * it won't... | |
6508 | */ | |
159ec1fc | 6509 | rdev_for_each_list(rdev, tmp, &candidates) { |
4b80991c | 6510 | list_del_init(&rdev->same_set); |
1da177e4 | 6511 | export_rdev(rdev); |
4b80991c | 6512 | } |
1da177e4 LT |
6513 | mddev_put(mddev); |
6514 | } | |
9d48739e | 6515 | pr_info("md: ... autorun DONE.\n"); |
1da177e4 | 6516 | } |
fdee8ae4 | 6517 | #endif /* !MODULE */ |
1da177e4 | 6518 | |
f72ffdd6 | 6519 | static int get_version(void __user *arg) |
1da177e4 LT |
6520 | { |
6521 | mdu_version_t ver; | |
6522 | ||
6523 | ver.major = MD_MAJOR_VERSION; | |
6524 | ver.minor = MD_MINOR_VERSION; | |
6525 | ver.patchlevel = MD_PATCHLEVEL_VERSION; | |
6526 | ||
6527 | if (copy_to_user(arg, &ver, sizeof(ver))) | |
6528 | return -EFAULT; | |
6529 | ||
6530 | return 0; | |
6531 | } | |
6532 | ||
f72ffdd6 | 6533 | static int get_array_info(struct mddev *mddev, void __user *arg) |
1da177e4 LT |
6534 | { |
6535 | mdu_array_info_t info; | |
a9f326eb | 6536 | int nr,working,insync,failed,spare; |
3cb03002 | 6537 | struct md_rdev *rdev; |
1da177e4 | 6538 | |
1ca69c4b N |
6539 | nr = working = insync = failed = spare = 0; |
6540 | rcu_read_lock(); | |
6541 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 6542 | nr++; |
b2d444d7 | 6543 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
6544 | failed++; |
6545 | else { | |
6546 | working++; | |
b2d444d7 | 6547 | if (test_bit(In_sync, &rdev->flags)) |
f72ffdd6 | 6548 | insync++; |
b347af81 SL |
6549 | else if (test_bit(Journal, &rdev->flags)) |
6550 | /* TODO: add journal count to md_u.h */ | |
6551 | ; | |
1da177e4 LT |
6552 | else |
6553 | spare++; | |
6554 | } | |
6555 | } | |
1ca69c4b | 6556 | rcu_read_unlock(); |
1da177e4 LT |
6557 | |
6558 | info.major_version = mddev->major_version; | |
6559 | info.minor_version = mddev->minor_version; | |
6560 | info.patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6561 | info.ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 6562 | info.level = mddev->level; |
58c0fed4 AN |
6563 | info.size = mddev->dev_sectors / 2; |
6564 | if (info.size != mddev->dev_sectors / 2) /* overflow */ | |
284ae7ca | 6565 | info.size = -1; |
1da177e4 LT |
6566 | info.nr_disks = nr; |
6567 | info.raid_disks = mddev->raid_disks; | |
6568 | info.md_minor = mddev->md_minor; | |
6569 | info.not_persistent= !mddev->persistent; | |
6570 | ||
9ebc6ef1 | 6571 | info.utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
6572 | info.state = 0; |
6573 | if (mddev->in_sync) | |
6574 | info.state = (1<<MD_SB_CLEAN); | |
c3d9714e | 6575 | if (mddev->bitmap && mddev->bitmap_info.offset) |
9bd35920 | 6576 | info.state |= (1<<MD_SB_BITMAP_PRESENT); |
ca8895d9 GR |
6577 | if (mddev_is_clustered(mddev)) |
6578 | info.state |= (1<<MD_SB_CLUSTERED); | |
a9f326eb | 6579 | info.active_disks = insync; |
1da177e4 LT |
6580 | info.working_disks = working; |
6581 | info.failed_disks = failed; | |
6582 | info.spare_disks = spare; | |
6583 | ||
6584 | info.layout = mddev->layout; | |
9d8f0363 | 6585 | info.chunk_size = mddev->chunk_sectors << 9; |
1da177e4 LT |
6586 | |
6587 | if (copy_to_user(arg, &info, sizeof(info))) | |
6588 | return -EFAULT; | |
6589 | ||
6590 | return 0; | |
6591 | } | |
6592 | ||
f72ffdd6 | 6593 | static int get_bitmap_file(struct mddev *mddev, void __user * arg) |
32a7627c N |
6594 | { |
6595 | mdu_bitmap_file_t *file = NULL; /* too big for stack allocation */ | |
f4ad3d38 | 6596 | char *ptr; |
4af1a041 | 6597 | int err; |
32a7627c | 6598 | |
b6878d9e | 6599 | file = kzalloc(sizeof(*file), GFP_NOIO); |
32a7627c | 6600 | if (!file) |
4af1a041 | 6601 | return -ENOMEM; |
32a7627c | 6602 | |
4af1a041 N |
6603 | err = 0; |
6604 | spin_lock(&mddev->lock); | |
25eafe1a BR |
6605 | /* bitmap enabled */ |
6606 | if (mddev->bitmap_info.file) { | |
6607 | ptr = file_path(mddev->bitmap_info.file, file->pathname, | |
6608 | sizeof(file->pathname)); | |
6609 | if (IS_ERR(ptr)) | |
6610 | err = PTR_ERR(ptr); | |
6611 | else | |
6612 | memmove(file->pathname, ptr, | |
6613 | sizeof(file->pathname)-(ptr-file->pathname)); | |
6614 | } | |
4af1a041 | 6615 | spin_unlock(&mddev->lock); |
32a7627c | 6616 | |
4af1a041 N |
6617 | if (err == 0 && |
6618 | copy_to_user(arg, file, sizeof(*file))) | |
32a7627c | 6619 | err = -EFAULT; |
4af1a041 | 6620 | |
32a7627c N |
6621 | kfree(file); |
6622 | return err; | |
6623 | } | |
6624 | ||
f72ffdd6 | 6625 | static int get_disk_info(struct mddev *mddev, void __user * arg) |
1da177e4 LT |
6626 | { |
6627 | mdu_disk_info_t info; | |
3cb03002 | 6628 | struct md_rdev *rdev; |
1da177e4 LT |
6629 | |
6630 | if (copy_from_user(&info, arg, sizeof(info))) | |
6631 | return -EFAULT; | |
6632 | ||
1ca69c4b | 6633 | rcu_read_lock(); |
57d051dc | 6634 | rdev = md_find_rdev_nr_rcu(mddev, info.number); |
1da177e4 LT |
6635 | if (rdev) { |
6636 | info.major = MAJOR(rdev->bdev->bd_dev); | |
6637 | info.minor = MINOR(rdev->bdev->bd_dev); | |
6638 | info.raid_disk = rdev->raid_disk; | |
6639 | info.state = 0; | |
b2d444d7 | 6640 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 6641 | info.state |= (1<<MD_DISK_FAULTY); |
b2d444d7 | 6642 | else if (test_bit(In_sync, &rdev->flags)) { |
1da177e4 LT |
6643 | info.state |= (1<<MD_DISK_ACTIVE); |
6644 | info.state |= (1<<MD_DISK_SYNC); | |
6645 | } | |
9efdca16 | 6646 | if (test_bit(Journal, &rdev->flags)) |
bac624f3 | 6647 | info.state |= (1<<MD_DISK_JOURNAL); |
8ddf9efe N |
6648 | if (test_bit(WriteMostly, &rdev->flags)) |
6649 | info.state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
6650 | if (test_bit(FailFast, &rdev->flags)) |
6651 | info.state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 LT |
6652 | } else { |
6653 | info.major = info.minor = 0; | |
6654 | info.raid_disk = -1; | |
6655 | info.state = (1<<MD_DISK_REMOVED); | |
6656 | } | |
1ca69c4b | 6657 | rcu_read_unlock(); |
1da177e4 LT |
6658 | |
6659 | if (copy_to_user(arg, &info, sizeof(info))) | |
6660 | return -EFAULT; | |
6661 | ||
6662 | return 0; | |
6663 | } | |
6664 | ||
7e0adbfc | 6665 | int md_add_new_disk(struct mddev *mddev, struct mdu_disk_info_s *info) |
1da177e4 | 6666 | { |
3cb03002 | 6667 | struct md_rdev *rdev; |
1da177e4 LT |
6668 | dev_t dev = MKDEV(info->major,info->minor); |
6669 | ||
1aee41f6 GR |
6670 | if (mddev_is_clustered(mddev) && |
6671 | !(info->state & ((1 << MD_DISK_CLUSTER_ADD) | (1 << MD_DISK_CANDIDATE)))) { | |
9d48739e N |
6672 | pr_warn("%s: Cannot add to clustered mddev.\n", |
6673 | mdname(mddev)); | |
1aee41f6 GR |
6674 | return -EINVAL; |
6675 | } | |
6676 | ||
1da177e4 LT |
6677 | if (info->major != MAJOR(dev) || info->minor != MINOR(dev)) |
6678 | return -EOVERFLOW; | |
6679 | ||
6680 | if (!mddev->raid_disks) { | |
6681 | int err; | |
6682 | /* expecting a device which has a superblock */ | |
6683 | rdev = md_import_device(dev, mddev->major_version, mddev->minor_version); | |
6684 | if (IS_ERR(rdev)) { | |
9d48739e | 6685 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6686 | PTR_ERR(rdev)); |
6687 | return PTR_ERR(rdev); | |
6688 | } | |
6689 | if (!list_empty(&mddev->disks)) { | |
3cb03002 N |
6690 | struct md_rdev *rdev0 |
6691 | = list_entry(mddev->disks.next, | |
6692 | struct md_rdev, same_set); | |
a9f326eb | 6693 | err = super_types[mddev->major_version] |
1da177e4 LT |
6694 | .load_super(rdev, rdev0, mddev->minor_version); |
6695 | if (err < 0) { | |
913cce5a CH |
6696 | pr_warn("md: %pg has different UUID to %pg\n", |
6697 | rdev->bdev, | |
6698 | rdev0->bdev); | |
1da177e4 LT |
6699 | export_rdev(rdev); |
6700 | return -EINVAL; | |
6701 | } | |
6702 | } | |
6703 | err = bind_rdev_to_array(rdev, mddev); | |
6704 | if (err) | |
6705 | export_rdev(rdev); | |
6706 | return err; | |
6707 | } | |
6708 | ||
6709 | /* | |
7e0adbfc | 6710 | * md_add_new_disk can be used once the array is assembled |
1da177e4 LT |
6711 | * to add "hot spares". They must already have a superblock |
6712 | * written | |
6713 | */ | |
6714 | if (mddev->pers) { | |
6715 | int err; | |
6716 | if (!mddev->pers->hot_add_disk) { | |
9d48739e N |
6717 | pr_warn("%s: personality does not support diskops!\n", |
6718 | mdname(mddev)); | |
1da177e4 LT |
6719 | return -EINVAL; |
6720 | } | |
7b1e35f6 N |
6721 | if (mddev->persistent) |
6722 | rdev = md_import_device(dev, mddev->major_version, | |
6723 | mddev->minor_version); | |
6724 | else | |
6725 | rdev = md_import_device(dev, -1, -1); | |
1da177e4 | 6726 | if (IS_ERR(rdev)) { |
9d48739e | 6727 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6728 | PTR_ERR(rdev)); |
6729 | return PTR_ERR(rdev); | |
6730 | } | |
1a855a06 | 6731 | /* set saved_raid_disk if appropriate */ |
41158c7e N |
6732 | if (!mddev->persistent) { |
6733 | if (info->state & (1<<MD_DISK_SYNC) && | |
bf572541 | 6734 | info->raid_disk < mddev->raid_disks) { |
41158c7e | 6735 | rdev->raid_disk = info->raid_disk; |
bf572541 | 6736 | set_bit(In_sync, &rdev->flags); |
8313b8e5 | 6737 | clear_bit(Bitmap_sync, &rdev->flags); |
bf572541 | 6738 | } else |
41158c7e | 6739 | rdev->raid_disk = -1; |
f466722c | 6740 | rdev->saved_raid_disk = rdev->raid_disk; |
41158c7e N |
6741 | } else |
6742 | super_types[mddev->major_version]. | |
6743 | validate_super(mddev, rdev); | |
bedd86b7 | 6744 | if ((info->state & (1<<MD_DISK_SYNC)) && |
f4563091 | 6745 | rdev->raid_disk != info->raid_disk) { |
bedd86b7 N |
6746 | /* This was a hot-add request, but events doesn't |
6747 | * match, so reject it. | |
6748 | */ | |
6749 | export_rdev(rdev); | |
6750 | return -EINVAL; | |
6751 | } | |
6752 | ||
b2d444d7 | 6753 | clear_bit(In_sync, &rdev->flags); /* just to be sure */ |
8ddf9efe N |
6754 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6755 | set_bit(WriteMostly, &rdev->flags); | |
575a80fa N |
6756 | else |
6757 | clear_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6758 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6759 | set_bit(FailFast, &rdev->flags); | |
6760 | else | |
6761 | clear_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6762 | |
f6b6ec5c SL |
6763 | if (info->state & (1<<MD_DISK_JOURNAL)) { |
6764 | struct md_rdev *rdev2; | |
6765 | bool has_journal = false; | |
6766 | ||
6767 | /* make sure no existing journal disk */ | |
6768 | rdev_for_each(rdev2, mddev) { | |
6769 | if (test_bit(Journal, &rdev2->flags)) { | |
6770 | has_journal = true; | |
6771 | break; | |
6772 | } | |
6773 | } | |
230b55fa | 6774 | if (has_journal || mddev->bitmap) { |
f6b6ec5c SL |
6775 | export_rdev(rdev); |
6776 | return -EBUSY; | |
6777 | } | |
bac624f3 | 6778 | set_bit(Journal, &rdev->flags); |
f6b6ec5c | 6779 | } |
1aee41f6 GR |
6780 | /* |
6781 | * check whether the device shows up in other nodes | |
6782 | */ | |
6783 | if (mddev_is_clustered(mddev)) { | |
dbb64f86 | 6784 | if (info->state & (1 << MD_DISK_CANDIDATE)) |
1aee41f6 | 6785 | set_bit(Candidate, &rdev->flags); |
dbb64f86 | 6786 | else if (info->state & (1 << MD_DISK_CLUSTER_ADD)) { |
1aee41f6 | 6787 | /* --add initiated by this node */ |
dbb64f86 | 6788 | err = md_cluster_ops->add_new_disk(mddev, rdev); |
1aee41f6 | 6789 | if (err) { |
1aee41f6 GR |
6790 | export_rdev(rdev); |
6791 | return err; | |
6792 | } | |
6793 | } | |
6794 | } | |
6795 | ||
1da177e4 LT |
6796 | rdev->raid_disk = -1; |
6797 | err = bind_rdev_to_array(rdev, mddev); | |
dbb64f86 | 6798 | |
1da177e4 LT |
6799 | if (err) |
6800 | export_rdev(rdev); | |
dbb64f86 GR |
6801 | |
6802 | if (mddev_is_clustered(mddev)) { | |
e566aef1 GJ |
6803 | if (info->state & (1 << MD_DISK_CANDIDATE)) { |
6804 | if (!err) { | |
6805 | err = md_cluster_ops->new_disk_ack(mddev, | |
6806 | err == 0); | |
6807 | if (err) | |
6808 | md_kick_rdev_from_array(rdev); | |
6809 | } | |
6810 | } else { | |
dbb64f86 GR |
6811 | if (err) |
6812 | md_cluster_ops->add_new_disk_cancel(mddev); | |
6813 | else | |
6814 | err = add_bound_rdev(rdev); | |
6815 | } | |
6816 | ||
6817 | } else if (!err) | |
a6da4ef8 | 6818 | err = add_bound_rdev(rdev); |
dbb64f86 | 6819 | |
1da177e4 LT |
6820 | return err; |
6821 | } | |
6822 | ||
7e0adbfc | 6823 | /* otherwise, md_add_new_disk is only allowed |
1da177e4 LT |
6824 | * for major_version==0 superblocks |
6825 | */ | |
6826 | if (mddev->major_version != 0) { | |
9d48739e | 6827 | pr_warn("%s: ADD_NEW_DISK not supported\n", mdname(mddev)); |
1da177e4 LT |
6828 | return -EINVAL; |
6829 | } | |
6830 | ||
6831 | if (!(info->state & (1<<MD_DISK_FAULTY))) { | |
6832 | int err; | |
d710e138 | 6833 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6834 | if (IS_ERR(rdev)) { |
9d48739e | 6835 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6836 | PTR_ERR(rdev)); |
6837 | return PTR_ERR(rdev); | |
6838 | } | |
6839 | rdev->desc_nr = info->number; | |
6840 | if (info->raid_disk < mddev->raid_disks) | |
6841 | rdev->raid_disk = info->raid_disk; | |
6842 | else | |
6843 | rdev->raid_disk = -1; | |
6844 | ||
1da177e4 | 6845 | if (rdev->raid_disk < mddev->raid_disks) |
b2d444d7 N |
6846 | if (info->state & (1<<MD_DISK_SYNC)) |
6847 | set_bit(In_sync, &rdev->flags); | |
1da177e4 | 6848 | |
8ddf9efe N |
6849 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6850 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6851 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6852 | set_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6853 | |
1da177e4 | 6854 | if (!mddev->persistent) { |
9d48739e | 6855 | pr_debug("md: nonpersistent superblock ...\n"); |
0fe80347 | 6856 | rdev->sb_start = bdev_nr_sectors(rdev->bdev); |
77304d2a | 6857 | } else |
57b2caa3 | 6858 | rdev->sb_start = calc_dev_sboffset(rdev); |
8190e754 | 6859 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6860 | |
2bf071bf N |
6861 | err = bind_rdev_to_array(rdev, mddev); |
6862 | if (err) { | |
6863 | export_rdev(rdev); | |
6864 | return err; | |
6865 | } | |
1da177e4 LT |
6866 | } |
6867 | ||
6868 | return 0; | |
6869 | } | |
6870 | ||
f72ffdd6 | 6871 | static int hot_remove_disk(struct mddev *mddev, dev_t dev) |
1da177e4 | 6872 | { |
3cb03002 | 6873 | struct md_rdev *rdev; |
1da177e4 | 6874 | |
c42a0e26 YY |
6875 | if (!mddev->pers) |
6876 | return -ENODEV; | |
6877 | ||
1da177e4 LT |
6878 | rdev = find_rdev(mddev, dev); |
6879 | if (!rdev) | |
6880 | return -ENXIO; | |
6881 | ||
2910ff17 GR |
6882 | if (rdev->raid_disk < 0) |
6883 | goto kick_rdev; | |
293467aa | 6884 | |
3ea8929d N |
6885 | clear_bit(Blocked, &rdev->flags); |
6886 | remove_and_add_spares(mddev, rdev); | |
6887 | ||
1da177e4 LT |
6888 | if (rdev->raid_disk >= 0) |
6889 | goto busy; | |
6890 | ||
2910ff17 | 6891 | kick_rdev: |
bca5b065 ZH |
6892 | if (mddev_is_clustered(mddev)) { |
6893 | if (md_cluster_ops->remove_disk(mddev, rdev)) | |
6894 | goto busy; | |
6895 | } | |
88bcfef7 | 6896 | |
fb56dfef | 6897 | md_kick_rdev_from_array(rdev); |
2953079c | 6898 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6899 | if (mddev->thread) |
6900 | md_wakeup_thread(mddev->thread); | |
6901 | else | |
6902 | md_update_sb(mddev, 1); | |
54679486 | 6903 | md_new_event(); |
1da177e4 LT |
6904 | |
6905 | return 0; | |
6906 | busy: | |
913cce5a CH |
6907 | pr_debug("md: cannot remove active disk %pg from %s ...\n", |
6908 | rdev->bdev, mdname(mddev)); | |
1da177e4 LT |
6909 | return -EBUSY; |
6910 | } | |
6911 | ||
f72ffdd6 | 6912 | static int hot_add_disk(struct mddev *mddev, dev_t dev) |
1da177e4 | 6913 | { |
1da177e4 | 6914 | int err; |
3cb03002 | 6915 | struct md_rdev *rdev; |
1da177e4 LT |
6916 | |
6917 | if (!mddev->pers) | |
6918 | return -ENODEV; | |
6919 | ||
6920 | if (mddev->major_version != 0) { | |
9d48739e | 6921 | pr_warn("%s: HOT_ADD may only be used with version-0 superblocks.\n", |
1da177e4 LT |
6922 | mdname(mddev)); |
6923 | return -EINVAL; | |
6924 | } | |
6925 | if (!mddev->pers->hot_add_disk) { | |
9d48739e | 6926 | pr_warn("%s: personality does not support diskops!\n", |
1da177e4 LT |
6927 | mdname(mddev)); |
6928 | return -EINVAL; | |
6929 | } | |
6930 | ||
d710e138 | 6931 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6932 | if (IS_ERR(rdev)) { |
9d48739e | 6933 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6934 | PTR_ERR(rdev)); |
6935 | return -EINVAL; | |
6936 | } | |
6937 | ||
6938 | if (mddev->persistent) | |
57b2caa3 | 6939 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 6940 | else |
0fe80347 | 6941 | rdev->sb_start = bdev_nr_sectors(rdev->bdev); |
1da177e4 | 6942 | |
8190e754 | 6943 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6944 | |
b2d444d7 | 6945 | if (test_bit(Faulty, &rdev->flags)) { |
913cce5a CH |
6946 | pr_warn("md: can not hot-add faulty %pg disk to %s!\n", |
6947 | rdev->bdev, mdname(mddev)); | |
1da177e4 LT |
6948 | err = -EINVAL; |
6949 | goto abort_export; | |
6950 | } | |
293467aa | 6951 | |
b2d444d7 | 6952 | clear_bit(In_sync, &rdev->flags); |
1da177e4 | 6953 | rdev->desc_nr = -1; |
5842730d | 6954 | rdev->saved_raid_disk = -1; |
2bf071bf N |
6955 | err = bind_rdev_to_array(rdev, mddev); |
6956 | if (err) | |
2aa82191 | 6957 | goto abort_export; |
1da177e4 LT |
6958 | |
6959 | /* | |
6960 | * The rest should better be atomic, we can have disk failures | |
6961 | * noticed in interrupt contexts ... | |
6962 | */ | |
6963 | ||
1da177e4 LT |
6964 | rdev->raid_disk = -1; |
6965 | ||
2953079c | 6966 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6967 | if (!mddev->thread) |
6968 | md_update_sb(mddev, 1); | |
f51d46d0 VV |
6969 | /* |
6970 | * If the new disk does not support REQ_NOWAIT, | |
6971 | * disable on the whole MD. | |
6972 | */ | |
568ec936 | 6973 | if (!bdev_nowait(rdev->bdev)) { |
913cce5a CH |
6974 | pr_info("%s: Disabling nowait because %pg does not support nowait\n", |
6975 | mdname(mddev), rdev->bdev); | |
f51d46d0 VV |
6976 | blk_queue_flag_clear(QUEUE_FLAG_NOWAIT, mddev->queue); |
6977 | } | |
1da177e4 LT |
6978 | /* |
6979 | * Kick recovery, maybe this spare has to be added to the | |
6980 | * array immediately. | |
6981 | */ | |
6982 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6983 | md_wakeup_thread(mddev->thread); | |
54679486 | 6984 | md_new_event(); |
1da177e4 LT |
6985 | return 0; |
6986 | ||
1da177e4 LT |
6987 | abort_export: |
6988 | export_rdev(rdev); | |
6989 | return err; | |
6990 | } | |
6991 | ||
fd01b88c | 6992 | static int set_bitmap_file(struct mddev *mddev, int fd) |
32a7627c | 6993 | { |
035328c2 | 6994 | int err = 0; |
32a7627c | 6995 | |
36fa3063 | 6996 | if (mddev->pers) { |
d66b1b39 | 6997 | if (!mddev->pers->quiesce || !mddev->thread) |
36fa3063 N |
6998 | return -EBUSY; |
6999 | if (mddev->recovery || mddev->sync_thread) | |
7000 | return -EBUSY; | |
7001 | /* we should be able to change the bitmap.. */ | |
7002 | } | |
32a7627c | 7003 | |
36fa3063 | 7004 | if (fd >= 0) { |
035328c2 | 7005 | struct inode *inode; |
1e594bb2 N |
7006 | struct file *f; |
7007 | ||
7008 | if (mddev->bitmap || mddev->bitmap_info.file) | |
36fa3063 | 7009 | return -EEXIST; /* cannot add when bitmap is present */ |
1e594bb2 | 7010 | f = fget(fd); |
32a7627c | 7011 | |
1e594bb2 | 7012 | if (f == NULL) { |
9d48739e N |
7013 | pr_warn("%s: error: failed to get bitmap file\n", |
7014 | mdname(mddev)); | |
36fa3063 N |
7015 | return -EBADF; |
7016 | } | |
7017 | ||
1e594bb2 | 7018 | inode = f->f_mapping->host; |
035328c2 | 7019 | if (!S_ISREG(inode->i_mode)) { |
9d48739e N |
7020 | pr_warn("%s: error: bitmap file must be a regular file\n", |
7021 | mdname(mddev)); | |
035328c2 | 7022 | err = -EBADF; |
1e594bb2 | 7023 | } else if (!(f->f_mode & FMODE_WRITE)) { |
9d48739e N |
7024 | pr_warn("%s: error: bitmap file must open for write\n", |
7025 | mdname(mddev)); | |
035328c2 N |
7026 | err = -EBADF; |
7027 | } else if (atomic_read(&inode->i_writecount) != 1) { | |
9d48739e N |
7028 | pr_warn("%s: error: bitmap file is already in use\n", |
7029 | mdname(mddev)); | |
035328c2 N |
7030 | err = -EBUSY; |
7031 | } | |
7032 | if (err) { | |
1e594bb2 | 7033 | fput(f); |
36fa3063 N |
7034 | return err; |
7035 | } | |
1e594bb2 | 7036 | mddev->bitmap_info.file = f; |
c3d9714e | 7037 | mddev->bitmap_info.offset = 0; /* file overrides offset */ |
36fa3063 N |
7038 | } else if (mddev->bitmap == NULL) |
7039 | return -ENOENT; /* cannot remove what isn't there */ | |
7040 | err = 0; | |
7041 | if (mddev->pers) { | |
69e51b44 | 7042 | if (fd >= 0) { |
f9209a32 GR |
7043 | struct bitmap *bitmap; |
7044 | ||
e64e4018 | 7045 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7046 | mddev_suspend(mddev); |
f9209a32 GR |
7047 | if (!IS_ERR(bitmap)) { |
7048 | mddev->bitmap = bitmap; | |
e64e4018 | 7049 | err = md_bitmap_load(mddev); |
ba599aca N |
7050 | } else |
7051 | err = PTR_ERR(bitmap); | |
52a0d49d | 7052 | if (err) { |
e64e4018 | 7053 | md_bitmap_destroy(mddev); |
52a0d49d N |
7054 | fd = -1; |
7055 | } | |
9e1cc0a5 | 7056 | mddev_resume(mddev); |
52a0d49d | 7057 | } else if (fd < 0) { |
9e1cc0a5 | 7058 | mddev_suspend(mddev); |
e64e4018 | 7059 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7060 | mddev_resume(mddev); |
d7375ab3 | 7061 | } |
d7375ab3 N |
7062 | } |
7063 | if (fd < 0) { | |
4af1a041 N |
7064 | struct file *f = mddev->bitmap_info.file; |
7065 | if (f) { | |
7066 | spin_lock(&mddev->lock); | |
7067 | mddev->bitmap_info.file = NULL; | |
7068 | spin_unlock(&mddev->lock); | |
7069 | fput(f); | |
7070 | } | |
36fa3063 N |
7071 | } |
7072 | ||
32a7627c N |
7073 | return err; |
7074 | } | |
7075 | ||
1da177e4 | 7076 | /* |
7e0adbfc | 7077 | * md_set_array_info is used two different ways |
1da177e4 LT |
7078 | * The original usage is when creating a new array. |
7079 | * In this usage, raid_disks is > 0 and it together with | |
7080 | * level, size, not_persistent,layout,chunksize determine the | |
7081 | * shape of the array. | |
7082 | * This will always create an array with a type-0.90.0 superblock. | |
7083 | * The newer usage is when assembling an array. | |
7084 | * In this case raid_disks will be 0, and the major_version field is | |
7085 | * use to determine which style super-blocks are to be found on the devices. | |
7086 | * The minor and patch _version numbers are also kept incase the | |
7087 | * super_block handler wishes to interpret them. | |
7088 | */ | |
7e0adbfc | 7089 | int md_set_array_info(struct mddev *mddev, struct mdu_array_info_s *info) |
1da177e4 | 7090 | { |
1da177e4 LT |
7091 | if (info->raid_disks == 0) { |
7092 | /* just setting version number for superblock loading */ | |
7093 | if (info->major_version < 0 || | |
50511da3 | 7094 | info->major_version >= ARRAY_SIZE(super_types) || |
1da177e4 LT |
7095 | super_types[info->major_version].name == NULL) { |
7096 | /* maybe try to auto-load a module? */ | |
9d48739e | 7097 | pr_warn("md: superblock version %d not known\n", |
1da177e4 LT |
7098 | info->major_version); |
7099 | return -EINVAL; | |
7100 | } | |
7101 | mddev->major_version = info->major_version; | |
7102 | mddev->minor_version = info->minor_version; | |
7103 | mddev->patch_version = info->patch_version; | |
3f9d7b0d | 7104 | mddev->persistent = !info->not_persistent; |
cbd19983 N |
7105 | /* ensure mddev_put doesn't delete this now that there |
7106 | * is some minimal configuration. | |
7107 | */ | |
9ebc6ef1 | 7108 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
7109 | return 0; |
7110 | } | |
7111 | mddev->major_version = MD_MAJOR_VERSION; | |
7112 | mddev->minor_version = MD_MINOR_VERSION; | |
7113 | mddev->patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 7114 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
7115 | |
7116 | mddev->level = info->level; | |
17115e03 | 7117 | mddev->clevel[0] = 0; |
58c0fed4 | 7118 | mddev->dev_sectors = 2 * (sector_t)info->size; |
1da177e4 LT |
7119 | mddev->raid_disks = info->raid_disks; |
7120 | /* don't set md_minor, it is determined by which /dev/md* was | |
7121 | * openned | |
7122 | */ | |
7123 | if (info->state & (1<<MD_SB_CLEAN)) | |
7124 | mddev->recovery_cp = MaxSector; | |
7125 | else | |
7126 | mddev->recovery_cp = 0; | |
7127 | mddev->persistent = ! info->not_persistent; | |
e691063a | 7128 | mddev->external = 0; |
1da177e4 LT |
7129 | |
7130 | mddev->layout = info->layout; | |
33f2c35a N |
7131 | if (mddev->level == 0) |
7132 | /* Cannot trust RAID0 layout info here */ | |
7133 | mddev->layout = -1; | |
9d8f0363 | 7134 | mddev->chunk_sectors = info->chunk_size >> 9; |
1da177e4 | 7135 | |
2953079c | 7136 | if (mddev->persistent) { |
1b3bae49 N |
7137 | mddev->max_disks = MD_SB_DISKS; |
7138 | mddev->flags = 0; | |
7139 | mddev->sb_flags = 0; | |
2953079c SL |
7140 | } |
7141 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
1da177e4 | 7142 | |
c3d9714e | 7143 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 7144 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
c3d9714e | 7145 | mddev->bitmap_info.offset = 0; |
b2a2703c | 7146 | |
f6705578 N |
7147 | mddev->reshape_position = MaxSector; |
7148 | ||
1da177e4 LT |
7149 | /* |
7150 | * Generate a 128 bit UUID | |
7151 | */ | |
7152 | get_random_bytes(mddev->uuid, 16); | |
7153 | ||
f6705578 | 7154 | mddev->new_level = mddev->level; |
664e7c41 | 7155 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
7156 | mddev->new_layout = mddev->layout; |
7157 | mddev->delta_disks = 0; | |
2c810cdd | 7158 | mddev->reshape_backwards = 0; |
f6705578 | 7159 | |
1da177e4 LT |
7160 | return 0; |
7161 | } | |
7162 | ||
fd01b88c | 7163 | void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors) |
1f403624 | 7164 | { |
efa4b77b | 7165 | lockdep_assert_held(&mddev->reconfig_mutex); |
b522adcd DW |
7166 | |
7167 | if (mddev->external_size) | |
7168 | return; | |
7169 | ||
1f403624 DW |
7170 | mddev->array_sectors = array_sectors; |
7171 | } | |
7172 | EXPORT_SYMBOL(md_set_array_sectors); | |
7173 | ||
fd01b88c | 7174 | static int update_size(struct mddev *mddev, sector_t num_sectors) |
a35b0d69 | 7175 | { |
3cb03002 | 7176 | struct md_rdev *rdev; |
a35b0d69 | 7177 | int rv; |
d71f9f88 | 7178 | int fit = (num_sectors == 0); |
818da59f | 7179 | sector_t old_dev_sectors = mddev->dev_sectors; |
ab5a98b1 | 7180 | |
a35b0d69 N |
7181 | if (mddev->pers->resize == NULL) |
7182 | return -EINVAL; | |
d71f9f88 AN |
7183 | /* The "num_sectors" is the number of sectors of each device that |
7184 | * is used. This can only make sense for arrays with redundancy. | |
7185 | * linear and raid0 always use whatever space is available. We can only | |
7186 | * consider changing this number if no resync or reconstruction is | |
7187 | * happening, and if the new size is acceptable. It must fit before the | |
0f420358 | 7188 | * sb_start or, if that is <data_offset, it must fit before the size |
d71f9f88 AN |
7189 | * of each device. If num_sectors is zero, we find the largest size |
7190 | * that fits. | |
a35b0d69 | 7191 | */ |
f851b60d N |
7192 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
7193 | mddev->sync_thread) | |
a35b0d69 | 7194 | return -EBUSY; |
f97a5528 | 7195 | if (!md_is_rdwr(mddev)) |
bd8839e0 | 7196 | return -EROFS; |
a4a6125a | 7197 | |
dafb20fa | 7198 | rdev_for_each(rdev, mddev) { |
dd8ac336 | 7199 | sector_t avail = rdev->sectors; |
01ab5662 | 7200 | |
d71f9f88 AN |
7201 | if (fit && (num_sectors == 0 || num_sectors > avail)) |
7202 | num_sectors = avail; | |
7203 | if (avail < num_sectors) | |
a35b0d69 N |
7204 | return -ENOSPC; |
7205 | } | |
d71f9f88 | 7206 | rv = mddev->pers->resize(mddev, num_sectors); |
c9483634 | 7207 | if (!rv) { |
818da59f GJ |
7208 | if (mddev_is_clustered(mddev)) |
7209 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
7210 | else if (mddev->queue) { | |
2c247c51 CH |
7211 | set_capacity_and_notify(mddev->gendisk, |
7212 | mddev->array_sectors); | |
c9483634 GJ |
7213 | } |
7214 | } | |
a35b0d69 N |
7215 | return rv; |
7216 | } | |
7217 | ||
fd01b88c | 7218 | static int update_raid_disks(struct mddev *mddev, int raid_disks) |
da943b99 N |
7219 | { |
7220 | int rv; | |
c6563a8c | 7221 | struct md_rdev *rdev; |
da943b99 | 7222 | /* change the number of raid disks */ |
63c70c4f | 7223 | if (mddev->pers->check_reshape == NULL) |
da943b99 | 7224 | return -EINVAL; |
f97a5528 | 7225 | if (!md_is_rdwr(mddev)) |
bd8839e0 | 7226 | return -EROFS; |
da943b99 | 7227 | if (raid_disks <= 0 || |
233fca36 | 7228 | (mddev->max_disks && raid_disks >= mddev->max_disks)) |
da943b99 | 7229 | return -EINVAL; |
f851b60d N |
7230 | if (mddev->sync_thread || |
7231 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || | |
a8da01f7 | 7232 | test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) || |
f851b60d | 7233 | mddev->reshape_position != MaxSector) |
da943b99 | 7234 | return -EBUSY; |
c6563a8c N |
7235 | |
7236 | rdev_for_each(rdev, mddev) { | |
7237 | if (mddev->raid_disks < raid_disks && | |
7238 | rdev->data_offset < rdev->new_data_offset) | |
7239 | return -EINVAL; | |
7240 | if (mddev->raid_disks > raid_disks && | |
7241 | rdev->data_offset > rdev->new_data_offset) | |
7242 | return -EINVAL; | |
7243 | } | |
7244 | ||
63c70c4f | 7245 | mddev->delta_disks = raid_disks - mddev->raid_disks; |
2c810cdd N |
7246 | if (mddev->delta_disks < 0) |
7247 | mddev->reshape_backwards = 1; | |
7248 | else if (mddev->delta_disks > 0) | |
7249 | mddev->reshape_backwards = 0; | |
63c70c4f N |
7250 | |
7251 | rv = mddev->pers->check_reshape(mddev); | |
2c810cdd | 7252 | if (rv < 0) { |
de171cb9 | 7253 | mddev->delta_disks = 0; |
2c810cdd N |
7254 | mddev->reshape_backwards = 0; |
7255 | } | |
da943b99 N |
7256 | return rv; |
7257 | } | |
7258 | ||
1da177e4 LT |
7259 | /* |
7260 | * update_array_info is used to change the configuration of an | |
7261 | * on-line array. | |
7262 | * The version, ctime,level,size,raid_disks,not_persistent, layout,chunk_size | |
7263 | * fields in the info are checked against the array. | |
7264 | * Any differences that cannot be handled will cause an error. | |
7265 | * Normally, only one change can be managed at a time. | |
7266 | */ | |
fd01b88c | 7267 | static int update_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
7268 | { |
7269 | int rv = 0; | |
7270 | int cnt = 0; | |
36fa3063 N |
7271 | int state = 0; |
7272 | ||
7273 | /* calculate expected state,ignoring low bits */ | |
c3d9714e | 7274 | if (mddev->bitmap && mddev->bitmap_info.offset) |
36fa3063 | 7275 | state |= (1 << MD_SB_BITMAP_PRESENT); |
1da177e4 LT |
7276 | |
7277 | if (mddev->major_version != info->major_version || | |
7278 | mddev->minor_version != info->minor_version || | |
7279 | /* mddev->patch_version != info->patch_version || */ | |
7280 | mddev->ctime != info->ctime || | |
7281 | mddev->level != info->level || | |
7282 | /* mddev->layout != info->layout || */ | |
4e023612 | 7283 | mddev->persistent != !info->not_persistent || |
9d8f0363 | 7284 | mddev->chunk_sectors != info->chunk_size >> 9 || |
36fa3063 N |
7285 | /* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */ |
7286 | ((state^info->state) & 0xfffffe00) | |
7287 | ) | |
1da177e4 LT |
7288 | return -EINVAL; |
7289 | /* Check there is only one change */ | |
58c0fed4 AN |
7290 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
7291 | cnt++; | |
7292 | if (mddev->raid_disks != info->raid_disks) | |
7293 | cnt++; | |
7294 | if (mddev->layout != info->layout) | |
7295 | cnt++; | |
7296 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) | |
7297 | cnt++; | |
7298 | if (cnt == 0) | |
7299 | return 0; | |
7300 | if (cnt > 1) | |
7301 | return -EINVAL; | |
1da177e4 LT |
7302 | |
7303 | if (mddev->layout != info->layout) { | |
7304 | /* Change layout | |
7305 | * we don't need to do anything at the md level, the | |
7306 | * personality will take care of it all. | |
7307 | */ | |
50ac168a | 7308 | if (mddev->pers->check_reshape == NULL) |
1da177e4 | 7309 | return -EINVAL; |
597a711b N |
7310 | else { |
7311 | mddev->new_layout = info->layout; | |
50ac168a | 7312 | rv = mddev->pers->check_reshape(mddev); |
597a711b N |
7313 | if (rv) |
7314 | mddev->new_layout = mddev->layout; | |
7315 | return rv; | |
7316 | } | |
1da177e4 | 7317 | } |
58c0fed4 | 7318 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
d71f9f88 | 7319 | rv = update_size(mddev, (sector_t)info->size * 2); |
a35b0d69 | 7320 | |
da943b99 N |
7321 | if (mddev->raid_disks != info->raid_disks) |
7322 | rv = update_raid_disks(mddev, info->raid_disks); | |
7323 | ||
36fa3063 | 7324 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) { |
293467aa GR |
7325 | if (mddev->pers->quiesce == NULL || mddev->thread == NULL) { |
7326 | rv = -EINVAL; | |
7327 | goto err; | |
7328 | } | |
7329 | if (mddev->recovery || mddev->sync_thread) { | |
7330 | rv = -EBUSY; | |
7331 | goto err; | |
7332 | } | |
36fa3063 | 7333 | if (info->state & (1<<MD_SB_BITMAP_PRESENT)) { |
f9209a32 | 7334 | struct bitmap *bitmap; |
36fa3063 | 7335 | /* add the bitmap */ |
293467aa GR |
7336 | if (mddev->bitmap) { |
7337 | rv = -EEXIST; | |
7338 | goto err; | |
7339 | } | |
7340 | if (mddev->bitmap_info.default_offset == 0) { | |
7341 | rv = -EINVAL; | |
7342 | goto err; | |
7343 | } | |
c3d9714e N |
7344 | mddev->bitmap_info.offset = |
7345 | mddev->bitmap_info.default_offset; | |
6409bb05 N |
7346 | mddev->bitmap_info.space = |
7347 | mddev->bitmap_info.default_space; | |
e64e4018 | 7348 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7349 | mddev_suspend(mddev); |
f9209a32 GR |
7350 | if (!IS_ERR(bitmap)) { |
7351 | mddev->bitmap = bitmap; | |
e64e4018 | 7352 | rv = md_bitmap_load(mddev); |
ba599aca N |
7353 | } else |
7354 | rv = PTR_ERR(bitmap); | |
36fa3063 | 7355 | if (rv) |
e64e4018 | 7356 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7357 | mddev_resume(mddev); |
36fa3063 N |
7358 | } else { |
7359 | /* remove the bitmap */ | |
293467aa GR |
7360 | if (!mddev->bitmap) { |
7361 | rv = -ENOENT; | |
7362 | goto err; | |
7363 | } | |
7364 | if (mddev->bitmap->storage.file) { | |
7365 | rv = -EINVAL; | |
7366 | goto err; | |
7367 | } | |
f6a2dc64 GJ |
7368 | if (mddev->bitmap_info.nodes) { |
7369 | /* hold PW on all the bitmap lock */ | |
7370 | if (md_cluster_ops->lock_all_bitmaps(mddev) <= 0) { | |
9d48739e | 7371 | pr_warn("md: can't change bitmap to none since the array is in use by more than one node\n"); |
f6a2dc64 GJ |
7372 | rv = -EPERM; |
7373 | md_cluster_ops->unlock_all_bitmaps(mddev); | |
7374 | goto err; | |
7375 | } | |
7376 | ||
7377 | mddev->bitmap_info.nodes = 0; | |
7378 | md_cluster_ops->leave(mddev); | |
edee9dfe | 7379 | module_put(md_cluster_mod); |
7c9d5c54 | 7380 | mddev->safemode_delay = DEFAULT_SAFEMODE_DELAY; |
f6a2dc64 | 7381 | } |
9e1cc0a5 | 7382 | mddev_suspend(mddev); |
e64e4018 | 7383 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7384 | mddev_resume(mddev); |
c3d9714e | 7385 | mddev->bitmap_info.offset = 0; |
36fa3063 N |
7386 | } |
7387 | } | |
850b2b42 | 7388 | md_update_sb(mddev, 1); |
293467aa GR |
7389 | return rv; |
7390 | err: | |
1da177e4 LT |
7391 | return rv; |
7392 | } | |
7393 | ||
fd01b88c | 7394 | static int set_disk_faulty(struct mddev *mddev, dev_t dev) |
1da177e4 | 7395 | { |
3cb03002 | 7396 | struct md_rdev *rdev; |
1ca69c4b | 7397 | int err = 0; |
1da177e4 LT |
7398 | |
7399 | if (mddev->pers == NULL) | |
7400 | return -ENODEV; | |
7401 | ||
1ca69c4b | 7402 | rcu_read_lock(); |
1532d9e8 | 7403 | rdev = md_find_rdev_rcu(mddev, dev); |
1da177e4 | 7404 | if (!rdev) |
1ca69c4b N |
7405 | err = -ENODEV; |
7406 | else { | |
7407 | md_error(mddev, rdev); | |
9631abdb | 7408 | if (test_bit(MD_BROKEN, &mddev->flags)) |
1ca69c4b N |
7409 | err = -EBUSY; |
7410 | } | |
7411 | rcu_read_unlock(); | |
7412 | return err; | |
1da177e4 LT |
7413 | } |
7414 | ||
2f9618ce AN |
7415 | /* |
7416 | * We have a problem here : there is no easy way to give a CHS | |
7417 | * virtual geometry. We currently pretend that we have a 2 heads | |
7418 | * 4 sectors (with a BIG number of cylinders...). This drives | |
7419 | * dosfs just mad... ;-) | |
7420 | */ | |
a885c8c4 CH |
7421 | static int md_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
7422 | { | |
fd01b88c | 7423 | struct mddev *mddev = bdev->bd_disk->private_data; |
a885c8c4 CH |
7424 | |
7425 | geo->heads = 2; | |
7426 | geo->sectors = 4; | |
49ce6cea | 7427 | geo->cylinders = mddev->array_sectors / 8; |
a885c8c4 CH |
7428 | return 0; |
7429 | } | |
7430 | ||
cb335f88 NS |
7431 | static inline bool md_ioctl_valid(unsigned int cmd) |
7432 | { | |
7433 | switch (cmd) { | |
7434 | case ADD_NEW_DISK: | |
cb335f88 NS |
7435 | case GET_ARRAY_INFO: |
7436 | case GET_BITMAP_FILE: | |
7437 | case GET_DISK_INFO: | |
7438 | case HOT_ADD_DISK: | |
7439 | case HOT_REMOVE_DISK: | |
cb335f88 NS |
7440 | case RAID_VERSION: |
7441 | case RESTART_ARRAY_RW: | |
7442 | case RUN_ARRAY: | |
7443 | case SET_ARRAY_INFO: | |
7444 | case SET_BITMAP_FILE: | |
7445 | case SET_DISK_FAULTY: | |
7446 | case STOP_ARRAY: | |
7447 | case STOP_ARRAY_RO: | |
1aee41f6 | 7448 | case CLUSTERED_DISK_NACK: |
cb335f88 NS |
7449 | return true; |
7450 | default: | |
7451 | return false; | |
7452 | } | |
7453 | } | |
7454 | ||
2f6d261e YB |
7455 | static int __md_set_array_info(struct mddev *mddev, void __user *argp) |
7456 | { | |
7457 | mdu_array_info_t info; | |
7458 | int err; | |
7459 | ||
7460 | if (!argp) | |
7461 | memset(&info, 0, sizeof(info)); | |
7462 | else if (copy_from_user(&info, argp, sizeof(info))) | |
7463 | return -EFAULT; | |
7464 | ||
7465 | if (mddev->pers) { | |
7466 | err = update_array_info(mddev, &info); | |
7467 | if (err) | |
7468 | pr_warn("md: couldn't update array info. %d\n", err); | |
7469 | return err; | |
7470 | } | |
7471 | ||
7472 | if (!list_empty(&mddev->disks)) { | |
7473 | pr_warn("md: array %s already has disks!\n", mdname(mddev)); | |
7474 | return -EBUSY; | |
7475 | } | |
7476 | ||
7477 | if (mddev->raid_disks) { | |
7478 | pr_warn("md: array %s already initialised!\n", mdname(mddev)); | |
7479 | return -EBUSY; | |
7480 | } | |
7481 | ||
7482 | err = md_set_array_info(mddev, &info); | |
7483 | if (err) | |
7484 | pr_warn("md: couldn't set array info. %d\n", err); | |
7485 | ||
7486 | return err; | |
7487 | } | |
7488 | ||
a39907fa | 7489 | static int md_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
7490 | unsigned int cmd, unsigned long arg) |
7491 | { | |
7492 | int err = 0; | |
7493 | void __user *argp = (void __user *)arg; | |
fd01b88c | 7494 | struct mddev *mddev = NULL; |
065e519e | 7495 | bool did_set_md_closing = false; |
1da177e4 | 7496 | |
cb335f88 NS |
7497 | if (!md_ioctl_valid(cmd)) |
7498 | return -ENOTTY; | |
7499 | ||
506c9e44 N |
7500 | switch (cmd) { |
7501 | case RAID_VERSION: | |
7502 | case GET_ARRAY_INFO: | |
7503 | case GET_DISK_INFO: | |
7504 | break; | |
7505 | default: | |
7506 | if (!capable(CAP_SYS_ADMIN)) | |
7507 | return -EACCES; | |
7508 | } | |
1da177e4 LT |
7509 | |
7510 | /* | |
7511 | * Commands dealing with the RAID driver but not any | |
7512 | * particular array: | |
7513 | */ | |
c02c0aeb N |
7514 | switch (cmd) { |
7515 | case RAID_VERSION: | |
7516 | err = get_version(argp); | |
3adc28d8 | 7517 | goto out; |
c02c0aeb | 7518 | default:; |
1da177e4 LT |
7519 | } |
7520 | ||
7521 | /* | |
7522 | * Commands creating/starting a new array: | |
7523 | */ | |
7524 | ||
a39907fa | 7525 | mddev = bdev->bd_disk->private_data; |
1da177e4 LT |
7526 | |
7527 | if (!mddev) { | |
7528 | BUG(); | |
3adc28d8 | 7529 | goto out; |
1da177e4 LT |
7530 | } |
7531 | ||
1ca69c4b N |
7532 | /* Some actions do not requires the mutex */ |
7533 | switch (cmd) { | |
7534 | case GET_ARRAY_INFO: | |
7535 | if (!mddev->raid_disks && !mddev->external) | |
7536 | err = -ENODEV; | |
7537 | else | |
7538 | err = get_array_info(mddev, argp); | |
3adc28d8 | 7539 | goto out; |
1ca69c4b N |
7540 | |
7541 | case GET_DISK_INFO: | |
7542 | if (!mddev->raid_disks && !mddev->external) | |
7543 | err = -ENODEV; | |
7544 | else | |
7545 | err = get_disk_info(mddev, argp); | |
3adc28d8 | 7546 | goto out; |
1ca69c4b N |
7547 | |
7548 | case SET_DISK_FAULTY: | |
7549 | err = set_disk_faulty(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7550 | goto out; |
4af1a041 N |
7551 | |
7552 | case GET_BITMAP_FILE: | |
7553 | err = get_bitmap_file(mddev, argp); | |
7554 | goto out; | |
7555 | ||
1ca69c4b N |
7556 | } |
7557 | ||
78b990cf | 7558 | if (cmd == ADD_NEW_DISK || cmd == HOT_ADD_DISK) |
cc1ffe61 | 7559 | flush_rdev_wq(mddev); |
a7a3f08d | 7560 | |
90f5f7ad HR |
7561 | if (cmd == HOT_REMOVE_DISK) |
7562 | /* need to ensure recovery thread has run */ | |
7563 | wait_event_interruptible_timeout(mddev->sb_wait, | |
7564 | !test_bit(MD_RECOVERY_NEEDED, | |
82a301cb | 7565 | &mddev->recovery), |
90f5f7ad | 7566 | msecs_to_jiffies(5000)); |
260fa034 N |
7567 | if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) { |
7568 | /* Need to flush page cache, and ensure no-one else opens | |
7569 | * and writes | |
7570 | */ | |
7571 | mutex_lock(&mddev->open_mutex); | |
9ba3b7f5 | 7572 | if (mddev->pers && atomic_read(&mddev->openers) > 1) { |
260fa034 N |
7573 | mutex_unlock(&mddev->open_mutex); |
7574 | err = -EBUSY; | |
3adc28d8 | 7575 | goto out; |
260fa034 | 7576 | } |
c731b84b DJ |
7577 | if (test_and_set_bit(MD_CLOSING, &mddev->flags)) { |
7578 | mutex_unlock(&mddev->open_mutex); | |
7579 | err = -EBUSY; | |
7580 | goto out; | |
7581 | } | |
065e519e | 7582 | did_set_md_closing = true; |
260fa034 N |
7583 | mutex_unlock(&mddev->open_mutex); |
7584 | sync_blockdev(bdev); | |
7585 | } | |
1da177e4 LT |
7586 | err = mddev_lock(mddev); |
7587 | if (err) { | |
9d48739e N |
7588 | pr_debug("md: ioctl lock interrupted, reason %d, cmd %d\n", |
7589 | err, cmd); | |
3adc28d8 | 7590 | goto out; |
1da177e4 LT |
7591 | } |
7592 | ||
c02c0aeb | 7593 | if (cmd == SET_ARRAY_INFO) { |
2f6d261e | 7594 | err = __md_set_array_info(mddev, argp); |
3adc28d8 | 7595 | goto unlock; |
1da177e4 LT |
7596 | } |
7597 | ||
7598 | /* | |
7599 | * Commands querying/configuring an existing array: | |
7600 | */ | |
32a7627c | 7601 | /* if we are not initialised yet, only ADD_NEW_DISK, STOP_ARRAY, |
3f9d7b0d | 7602 | * RUN_ARRAY, and GET_ and SET_BITMAP_FILE are allowed */ |
a17184a9 N |
7603 | if ((!mddev->raid_disks && !mddev->external) |
7604 | && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY | |
7605 | && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE | |
7606 | && cmd != GET_BITMAP_FILE) { | |
1da177e4 | 7607 | err = -ENODEV; |
3adc28d8 | 7608 | goto unlock; |
1da177e4 LT |
7609 | } |
7610 | ||
7611 | /* | |
7612 | * Commands even a read-only array can execute: | |
7613 | */ | |
c02c0aeb | 7614 | switch (cmd) { |
c02c0aeb N |
7615 | case RESTART_ARRAY_RW: |
7616 | err = restart_array(mddev); | |
3adc28d8 | 7617 | goto unlock; |
1da177e4 | 7618 | |
c02c0aeb N |
7619 | case STOP_ARRAY: |
7620 | err = do_md_stop(mddev, 0, bdev); | |
3adc28d8 | 7621 | goto unlock; |
1da177e4 | 7622 | |
c02c0aeb N |
7623 | case STOP_ARRAY_RO: |
7624 | err = md_set_readonly(mddev, bdev); | |
3adc28d8 | 7625 | goto unlock; |
1da177e4 | 7626 | |
3ea8929d N |
7627 | case HOT_REMOVE_DISK: |
7628 | err = hot_remove_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7629 | goto unlock; |
3ea8929d | 7630 | |
7ceb17e8 N |
7631 | case ADD_NEW_DISK: |
7632 | /* We can support ADD_NEW_DISK on read-only arrays | |
466ad292 | 7633 | * only if we are re-adding a preexisting device. |
7ceb17e8 N |
7634 | * So require mddev->pers and MD_DISK_SYNC. |
7635 | */ | |
7636 | if (mddev->pers) { | |
7637 | mdu_disk_info_t info; | |
7638 | if (copy_from_user(&info, argp, sizeof(info))) | |
7639 | err = -EFAULT; | |
7640 | else if (!(info.state & (1<<MD_DISK_SYNC))) | |
7641 | /* Need to clear read-only for this */ | |
7642 | break; | |
7643 | else | |
7e0adbfc | 7644 | err = md_add_new_disk(mddev, &info); |
3adc28d8 | 7645 | goto unlock; |
7ceb17e8 N |
7646 | } |
7647 | break; | |
1da177e4 LT |
7648 | } |
7649 | ||
7650 | /* | |
7651 | * The remaining ioctls are changing the state of the | |
f91de92e | 7652 | * superblock, so we do not allow them on read-only arrays. |
1da177e4 | 7653 | */ |
f97a5528 YB |
7654 | if (!md_is_rdwr(mddev) && mddev->pers) { |
7655 | if (mddev->ro != MD_AUTO_READ) { | |
f91de92e | 7656 | err = -EROFS; |
3adc28d8 | 7657 | goto unlock; |
f91de92e | 7658 | } |
f97a5528 YB |
7659 | mddev->ro = MD_RDWR; |
7660 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
7661 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7662 | /* mddev_unlock will wake thread */ | |
7663 | /* If a device failed while we were read-only, we | |
7664 | * need to make sure the metadata is updated now. | |
7665 | */ | |
7666 | if (test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) { | |
7667 | mddev_unlock(mddev); | |
7668 | wait_event(mddev->sb_wait, | |
7669 | !test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags) && | |
7670 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); | |
7671 | mddev_lock_nointr(mddev); | |
7672 | } | |
1da177e4 LT |
7673 | } |
7674 | ||
c02c0aeb N |
7675 | switch (cmd) { |
7676 | case ADD_NEW_DISK: | |
1da177e4 | 7677 | { |
c02c0aeb N |
7678 | mdu_disk_info_t info; |
7679 | if (copy_from_user(&info, argp, sizeof(info))) | |
7680 | err = -EFAULT; | |
7681 | else | |
7e0adbfc | 7682 | err = md_add_new_disk(mddev, &info); |
3adc28d8 | 7683 | goto unlock; |
c02c0aeb | 7684 | } |
1da177e4 | 7685 | |
1aee41f6 GR |
7686 | case CLUSTERED_DISK_NACK: |
7687 | if (mddev_is_clustered(mddev)) | |
7688 | md_cluster_ops->new_disk_ack(mddev, false); | |
7689 | else | |
7690 | err = -EINVAL; | |
7691 | goto unlock; | |
7692 | ||
c02c0aeb N |
7693 | case HOT_ADD_DISK: |
7694 | err = hot_add_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7695 | goto unlock; |
1da177e4 | 7696 | |
c02c0aeb N |
7697 | case RUN_ARRAY: |
7698 | err = do_md_run(mddev); | |
3adc28d8 | 7699 | goto unlock; |
1da177e4 | 7700 | |
c02c0aeb N |
7701 | case SET_BITMAP_FILE: |
7702 | err = set_bitmap_file(mddev, (int)arg); | |
3adc28d8 | 7703 | goto unlock; |
32a7627c | 7704 | |
c02c0aeb N |
7705 | default: |
7706 | err = -EINVAL; | |
3adc28d8 | 7707 | goto unlock; |
1da177e4 LT |
7708 | } |
7709 | ||
3adc28d8 | 7710 | unlock: |
d3374825 N |
7711 | if (mddev->hold_active == UNTIL_IOCTL && |
7712 | err != -EINVAL) | |
7713 | mddev->hold_active = 0; | |
1da177e4 | 7714 | mddev_unlock(mddev); |
3adc28d8 | 7715 | out: |
065e519e N |
7716 | if(did_set_md_closing) |
7717 | clear_bit(MD_CLOSING, &mddev->flags); | |
1da177e4 LT |
7718 | return err; |
7719 | } | |
aa98aa31 AB |
7720 | #ifdef CONFIG_COMPAT |
7721 | static int md_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
7722 | unsigned int cmd, unsigned long arg) | |
7723 | { | |
7724 | switch (cmd) { | |
7725 | case HOT_REMOVE_DISK: | |
7726 | case HOT_ADD_DISK: | |
7727 | case SET_DISK_FAULTY: | |
7728 | case SET_BITMAP_FILE: | |
7729 | /* These take in integer arg, do not convert */ | |
7730 | break; | |
7731 | default: | |
7732 | arg = (unsigned long)compat_ptr(arg); | |
7733 | break; | |
7734 | } | |
7735 | ||
7736 | return md_ioctl(bdev, mode, cmd, arg); | |
7737 | } | |
7738 | #endif /* CONFIG_COMPAT */ | |
1da177e4 | 7739 | |
118cf084 CH |
7740 | static int md_set_read_only(struct block_device *bdev, bool ro) |
7741 | { | |
7742 | struct mddev *mddev = bdev->bd_disk->private_data; | |
7743 | int err; | |
7744 | ||
7745 | err = mddev_lock(mddev); | |
7746 | if (err) | |
7747 | return err; | |
7748 | ||
7749 | if (!mddev->raid_disks && !mddev->external) { | |
7750 | err = -ENODEV; | |
7751 | goto out_unlock; | |
7752 | } | |
7753 | ||
7754 | /* | |
7755 | * Transitioning to read-auto need only happen for arrays that call | |
7756 | * md_write_start and which are not ready for writes yet. | |
7757 | */ | |
f97a5528 | 7758 | if (!ro && mddev->ro == MD_RDONLY && mddev->pers) { |
118cf084 CH |
7759 | err = restart_array(mddev); |
7760 | if (err) | |
7761 | goto out_unlock; | |
f97a5528 | 7762 | mddev->ro = MD_AUTO_READ; |
118cf084 CH |
7763 | } |
7764 | ||
7765 | out_unlock: | |
7766 | mddev_unlock(mddev); | |
7767 | return err; | |
7768 | } | |
7769 | ||
a39907fa | 7770 | static int md_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 7771 | { |
5b26804b | 7772 | struct mddev *mddev; |
1da177e4 LT |
7773 | int err; |
7774 | ||
5b26804b CH |
7775 | spin_lock(&all_mddevs_lock); |
7776 | mddev = mddev_get(bdev->bd_disk->private_data); | |
7777 | spin_unlock(&all_mddevs_lock); | |
0c098220 YL |
7778 | if (!mddev) |
7779 | return -ENODEV; | |
7780 | ||
5b26804b CH |
7781 | err = mutex_lock_interruptible(&mddev->open_mutex); |
7782 | if (err) | |
1da177e4 LT |
7783 | goto out; |
7784 | ||
5b26804b CH |
7785 | err = -ENODEV; |
7786 | if (test_bit(MD_CLOSING, &mddev->flags)) | |
7787 | goto out_unlock; | |
af8d8e6f | 7788 | |
f2ea68cf | 7789 | atomic_inc(&mddev->openers); |
c8c00a69 | 7790 | mutex_unlock(&mddev->open_mutex); |
1da177e4 | 7791 | |
818077d6 | 7792 | bdev_check_media_change(bdev); |
5b26804b CH |
7793 | return 0; |
7794 | ||
7795 | out_unlock: | |
7796 | mutex_unlock(&mddev->open_mutex); | |
7797 | out: | |
7798 | mddev_put(mddev); | |
1da177e4 LT |
7799 | return err; |
7800 | } | |
7801 | ||
db2a144b | 7802 | static void md_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 7803 | { |
f72ffdd6 | 7804 | struct mddev *mddev = disk->private_data; |
1da177e4 | 7805 | |
52e5f9d1 | 7806 | BUG_ON(!mddev); |
f2ea68cf | 7807 | atomic_dec(&mddev->openers); |
1da177e4 | 7808 | mddev_put(mddev); |
1da177e4 | 7809 | } |
f0b4f7e2 | 7810 | |
a564e23f | 7811 | static unsigned int md_check_events(struct gendisk *disk, unsigned int clearing) |
f0b4f7e2 | 7812 | { |
fd01b88c | 7813 | struct mddev *mddev = disk->private_data; |
a564e23f | 7814 | unsigned int ret = 0; |
f0b4f7e2 | 7815 | |
a564e23f CH |
7816 | if (mddev->changed) |
7817 | ret = DISK_EVENT_MEDIA_CHANGE; | |
f0b4f7e2 | 7818 | mddev->changed = 0; |
a564e23f | 7819 | return ret; |
f0b4f7e2 | 7820 | } |
a564e23f | 7821 | |
e8c59ac4 CH |
7822 | static void md_free_disk(struct gendisk *disk) |
7823 | { | |
7824 | struct mddev *mddev = disk->private_data; | |
7825 | ||
433279be | 7826 | percpu_ref_exit(&mddev->writes_pending); |
12a6caf2 | 7827 | mddev_free(mddev); |
e8c59ac4 CH |
7828 | } |
7829 | ||
7e0adbfc | 7830 | const struct block_device_operations md_fops = |
1da177e4 LT |
7831 | { |
7832 | .owner = THIS_MODULE, | |
c62b37d9 | 7833 | .submit_bio = md_submit_bio, |
a39907fa AV |
7834 | .open = md_open, |
7835 | .release = md_release, | |
b492b852 | 7836 | .ioctl = md_ioctl, |
aa98aa31 AB |
7837 | #ifdef CONFIG_COMPAT |
7838 | .compat_ioctl = md_compat_ioctl, | |
7839 | #endif | |
a885c8c4 | 7840 | .getgeo = md_getgeo, |
a564e23f | 7841 | .check_events = md_check_events, |
118cf084 | 7842 | .set_read_only = md_set_read_only, |
e8c59ac4 | 7843 | .free_disk = md_free_disk, |
1da177e4 LT |
7844 | }; |
7845 | ||
f72ffdd6 | 7846 | static int md_thread(void *arg) |
1da177e4 | 7847 | { |
2b8bf345 | 7848 | struct md_thread *thread = arg; |
1da177e4 | 7849 | |
1da177e4 LT |
7850 | /* |
7851 | * md_thread is a 'system-thread', it's priority should be very | |
7852 | * high. We avoid resource deadlocks individually in each | |
7853 | * raid personality. (RAID5 does preallocation) We also use RR and | |
7854 | * the very same RT priority as kswapd, thus we will never get | |
7855 | * into a priority inversion deadlock. | |
7856 | * | |
7857 | * we definitely have to have equal or higher priority than | |
7858 | * bdflush, otherwise bdflush will deadlock if there are too | |
7859 | * many dirty RAID5 blocks. | |
7860 | */ | |
1da177e4 | 7861 | |
6985c43f | 7862 | allow_signal(SIGKILL); |
a6fb0934 | 7863 | while (!kthread_should_stop()) { |
1da177e4 | 7864 | |
93588e22 N |
7865 | /* We need to wait INTERRUPTIBLE so that |
7866 | * we don't add to the load-average. | |
7867 | * That means we need to be sure no signals are | |
7868 | * pending | |
7869 | */ | |
7870 | if (signal_pending(current)) | |
7871 | flush_signals(current); | |
7872 | ||
7873 | wait_event_interruptible_timeout | |
7874 | (thread->wqueue, | |
7875 | test_bit(THREAD_WAKEUP, &thread->flags) | |
ce1ccd07 | 7876 | || kthread_should_stop() || kthread_should_park(), |
93588e22 | 7877 | thread->timeout); |
1da177e4 | 7878 | |
6c987910 | 7879 | clear_bit(THREAD_WAKEUP, &thread->flags); |
ce1ccd07 SL |
7880 | if (kthread_should_park()) |
7881 | kthread_parkme(); | |
6c987910 | 7882 | if (!kthread_should_stop()) |
4ed8731d | 7883 | thread->run(thread); |
1da177e4 | 7884 | } |
a6fb0934 | 7885 | |
1da177e4 LT |
7886 | return 0; |
7887 | } | |
7888 | ||
2b8bf345 | 7889 | void md_wakeup_thread(struct md_thread *thread) |
1da177e4 LT |
7890 | { |
7891 | if (thread) { | |
36a4e1fe | 7892 | pr_debug("md: waking up MD thread %s.\n", thread->tsk->comm); |
d1d90147 GJ |
7893 | set_bit(THREAD_WAKEUP, &thread->flags); |
7894 | wake_up(&thread->wqueue); | |
1da177e4 LT |
7895 | } |
7896 | } | |
6c144d31 | 7897 | EXPORT_SYMBOL(md_wakeup_thread); |
1da177e4 | 7898 | |
4ed8731d SL |
7899 | struct md_thread *md_register_thread(void (*run) (struct md_thread *), |
7900 | struct mddev *mddev, const char *name) | |
1da177e4 | 7901 | { |
2b8bf345 | 7902 | struct md_thread *thread; |
1da177e4 | 7903 | |
2b8bf345 | 7904 | thread = kzalloc(sizeof(struct md_thread), GFP_KERNEL); |
1da177e4 LT |
7905 | if (!thread) |
7906 | return NULL; | |
7907 | ||
1da177e4 LT |
7908 | init_waitqueue_head(&thread->wqueue); |
7909 | ||
1da177e4 LT |
7910 | thread->run = run; |
7911 | thread->mddev = mddev; | |
32a7627c | 7912 | thread->timeout = MAX_SCHEDULE_TIMEOUT; |
0da3c619 N |
7913 | thread->tsk = kthread_run(md_thread, thread, |
7914 | "%s_%s", | |
7915 | mdname(thread->mddev), | |
0232605d | 7916 | name); |
a6fb0934 | 7917 | if (IS_ERR(thread->tsk)) { |
1da177e4 LT |
7918 | kfree(thread); |
7919 | return NULL; | |
7920 | } | |
1da177e4 LT |
7921 | return thread; |
7922 | } | |
6c144d31 | 7923 | EXPORT_SYMBOL(md_register_thread); |
1da177e4 | 7924 | |
2b8bf345 | 7925 | void md_unregister_thread(struct md_thread **threadp) |
1da177e4 | 7926 | { |
1e267742 GJ |
7927 | struct md_thread *thread; |
7928 | ||
7929 | /* | |
7930 | * Locking ensures that mddev_unlock does not wake_up a | |
01f96c0a N |
7931 | * non-existent thread |
7932 | */ | |
7933 | spin_lock(&pers_lock); | |
1e267742 GJ |
7934 | thread = *threadp; |
7935 | if (!thread) { | |
7936 | spin_unlock(&pers_lock); | |
7937 | return; | |
7938 | } | |
01f96c0a N |
7939 | *threadp = NULL; |
7940 | spin_unlock(&pers_lock); | |
a6fb0934 | 7941 | |
1e267742 | 7942 | pr_debug("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk)); |
a6fb0934 | 7943 | kthread_stop(thread->tsk); |
1da177e4 LT |
7944 | kfree(thread); |
7945 | } | |
6c144d31 | 7946 | EXPORT_SYMBOL(md_unregister_thread); |
1da177e4 | 7947 | |
fd01b88c | 7948 | void md_error(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 7949 | { |
b2d444d7 | 7950 | if (!rdev || test_bit(Faulty, &rdev->flags)) |
1da177e4 | 7951 | return; |
6bfe0b49 | 7952 | |
de393cde | 7953 | if (!mddev->pers || !mddev->pers->error_handler) |
1da177e4 | 7954 | return; |
9631abdb MT |
7955 | mddev->pers->error_handler(mddev, rdev); |
7956 | ||
c31fea2f MT |
7957 | if (mddev->pers->level == 0 || mddev->pers->level == LEVEL_LINEAR) |
7958 | return; | |
7959 | ||
9631abdb | 7960 | if (mddev->degraded && !test_bit(MD_BROKEN, &mddev->flags)) |
72a23c21 | 7961 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
00bcb4ac | 7962 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 | 7963 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
9631abdb MT |
7964 | if (!test_bit(MD_BROKEN, &mddev->flags)) { |
7965 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7966 | md_wakeup_thread(mddev->thread); | |
7967 | } | |
768a418d | 7968 | if (mddev->event_work.func) |
e804ac78 | 7969 | queue_work(md_misc_wq, &mddev->event_work); |
54679486 | 7970 | md_new_event(); |
1da177e4 | 7971 | } |
6c144d31 | 7972 | EXPORT_SYMBOL(md_error); |
1da177e4 LT |
7973 | |
7974 | /* seq_file implementation /proc/mdstat */ | |
7975 | ||
7976 | static void status_unused(struct seq_file *seq) | |
7977 | { | |
7978 | int i = 0; | |
3cb03002 | 7979 | struct md_rdev *rdev; |
1da177e4 LT |
7980 | |
7981 | seq_printf(seq, "unused devices: "); | |
7982 | ||
159ec1fc | 7983 | list_for_each_entry(rdev, &pending_raid_disks, same_set) { |
1da177e4 | 7984 | i++; |
913cce5a | 7985 | seq_printf(seq, "%pg ", rdev->bdev); |
1da177e4 LT |
7986 | } |
7987 | if (!i) | |
7988 | seq_printf(seq, "<none>"); | |
7989 | ||
7990 | seq_printf(seq, "\n"); | |
7991 | } | |
7992 | ||
f7851be7 | 7993 | static int status_resync(struct seq_file *seq, struct mddev *mddev) |
1da177e4 | 7994 | { |
dd71cf6b | 7995 | sector_t max_sectors, resync, res; |
9642fa73 MT |
7996 | unsigned long dt, db = 0; |
7997 | sector_t rt, curr_mark_cnt, resync_mark_cnt; | |
7998 | int scale, recovery_active; | |
4588b42e | 7999 | unsigned int per_milli; |
1da177e4 | 8000 | |
c804cdec N |
8001 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8002 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
dd71cf6b | 8003 | max_sectors = mddev->resync_max_sectors; |
1da177e4 | 8004 | else |
dd71cf6b | 8005 | max_sectors = mddev->dev_sectors; |
1da177e4 | 8006 | |
f7851be7 | 8007 | resync = mddev->curr_resync; |
eac58d08 | 8008 | if (resync < MD_RESYNC_ACTIVE) { |
f7851be7 N |
8009 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) |
8010 | /* Still cleaning up */ | |
8011 | resync = max_sectors; | |
b368856a | 8012 | } else if (resync > max_sectors) { |
d2e2ec82 | 8013 | resync = max_sectors; |
b368856a | 8014 | } else { |
6efddf1e YK |
8015 | res = atomic_read(&mddev->recovery_active); |
8016 | /* | |
8017 | * Resync has started, but the subtraction has overflowed or | |
8018 | * yielded one of the special values. Force it to active to | |
8019 | * ensure the status reports an active resync. | |
8020 | */ | |
8021 | if (resync < res || resync - res < MD_RESYNC_ACTIVE) | |
b368856a | 8022 | resync = MD_RESYNC_ACTIVE; |
6efddf1e YK |
8023 | else |
8024 | resync -= res; | |
b368856a | 8025 | } |
f7851be7 | 8026 | |
eac58d08 | 8027 | if (resync == MD_RESYNC_NONE) { |
0357ba27 GJ |
8028 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery)) { |
8029 | struct md_rdev *rdev; | |
8030 | ||
8031 | rdev_for_each(rdev, mddev) | |
8032 | if (rdev->raid_disk >= 0 && | |
8033 | !test_bit(Faulty, &rdev->flags) && | |
8034 | rdev->recovery_offset != MaxSector && | |
8035 | rdev->recovery_offset) { | |
8036 | seq_printf(seq, "\trecover=REMOTE"); | |
8037 | return 1; | |
8038 | } | |
8039 | if (mddev->reshape_position != MaxSector) | |
8040 | seq_printf(seq, "\treshape=REMOTE"); | |
8041 | else | |
8042 | seq_printf(seq, "\tresync=REMOTE"); | |
8043 | return 1; | |
8044 | } | |
f7851be7 N |
8045 | if (mddev->recovery_cp < MaxSector) { |
8046 | seq_printf(seq, "\tresync=PENDING"); | |
8047 | return 1; | |
8048 | } | |
8049 | return 0; | |
8050 | } | |
eac58d08 | 8051 | if (resync < MD_RESYNC_ACTIVE) { |
f7851be7 N |
8052 | seq_printf(seq, "\tresync=DELAYED"); |
8053 | return 1; | |
8054 | } | |
8055 | ||
403df478 | 8056 | WARN_ON(max_sectors == 0); |
4588b42e | 8057 | /* Pick 'scale' such that (resync>>scale)*1000 will fit |
dd71cf6b | 8058 | * in a sector_t, and (max_sectors>>scale) will fit in a |
4588b42e N |
8059 | * u32, as those are the requirements for sector_div. |
8060 | * Thus 'scale' must be at least 10 | |
8061 | */ | |
8062 | scale = 10; | |
8063 | if (sizeof(sector_t) > sizeof(unsigned long)) { | |
dd71cf6b | 8064 | while ( max_sectors/2 > (1ULL<<(scale+32))) |
4588b42e N |
8065 | scale++; |
8066 | } | |
8067 | res = (resync>>scale)*1000; | |
dd71cf6b | 8068 | sector_div(res, (u32)((max_sectors>>scale)+1)); |
4588b42e N |
8069 | |
8070 | per_milli = res; | |
1da177e4 | 8071 | { |
4588b42e | 8072 | int i, x = per_milli/50, y = 20-x; |
1da177e4 LT |
8073 | seq_printf(seq, "["); |
8074 | for (i = 0; i < x; i++) | |
8075 | seq_printf(seq, "="); | |
8076 | seq_printf(seq, ">"); | |
8077 | for (i = 0; i < y; i++) | |
8078 | seq_printf(seq, "."); | |
8079 | seq_printf(seq, "] "); | |
8080 | } | |
4588b42e | 8081 | seq_printf(seq, " %s =%3u.%u%% (%llu/%llu)", |
ccfcc3c1 N |
8082 | (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)? |
8083 | "reshape" : | |
61df9d91 N |
8084 | (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)? |
8085 | "check" : | |
8086 | (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? | |
8087 | "resync" : "recovery"))), | |
8088 | per_milli/10, per_milli % 10, | |
dd71cf6b N |
8089 | (unsigned long long) resync/2, |
8090 | (unsigned long long) max_sectors/2); | |
1da177e4 LT |
8091 | |
8092 | /* | |
1da177e4 LT |
8093 | * dt: time from mark until now |
8094 | * db: blocks written from mark until now | |
8095 | * rt: remaining time | |
dd71cf6b | 8096 | * |
9642fa73 MT |
8097 | * rt is a sector_t, which is always 64bit now. We are keeping |
8098 | * the original algorithm, but it is not really necessary. | |
8099 | * | |
8100 | * Original algorithm: | |
8101 | * So we divide before multiply in case it is 32bit and close | |
8102 | * to the limit. | |
8103 | * We scale the divisor (db) by 32 to avoid losing precision | |
8104 | * near the end of resync when the number of remaining sectors | |
8105 | * is close to 'db'. | |
8106 | * We then divide rt by 32 after multiplying by db to compensate. | |
8107 | * The '+1' avoids division by zero if db is very small. | |
1da177e4 LT |
8108 | */ |
8109 | dt = ((jiffies - mddev->resync_mark) / HZ); | |
8110 | if (!dt) dt++; | |
9642fa73 MT |
8111 | |
8112 | curr_mark_cnt = mddev->curr_mark_cnt; | |
8113 | recovery_active = atomic_read(&mddev->recovery_active); | |
8114 | resync_mark_cnt = mddev->resync_mark_cnt; | |
8115 | ||
8116 | if (curr_mark_cnt >= (recovery_active + resync_mark_cnt)) | |
8117 | db = curr_mark_cnt - (recovery_active + resync_mark_cnt); | |
1da177e4 | 8118 | |
dd71cf6b | 8119 | rt = max_sectors - resync; /* number of remaining sectors */ |
9642fa73 | 8120 | rt = div64_u64(rt, db/32+1); |
dd71cf6b N |
8121 | rt *= dt; |
8122 | rt >>= 5; | |
8123 | ||
8124 | seq_printf(seq, " finish=%lu.%lumin", (unsigned long)rt / 60, | |
8125 | ((unsigned long)rt % 60)/6); | |
1da177e4 | 8126 | |
ff4e8d9a | 8127 | seq_printf(seq, " speed=%ldK/sec", db/2/dt); |
f7851be7 | 8128 | return 1; |
1da177e4 LT |
8129 | } |
8130 | ||
8131 | static void *md_seq_start(struct seq_file *seq, loff_t *pos) | |
8132 | { | |
8133 | struct list_head *tmp; | |
8134 | loff_t l = *pos; | |
fd01b88c | 8135 | struct mddev *mddev; |
1da177e4 | 8136 | |
7abfabaf JG |
8137 | if (l == 0x10000) { |
8138 | ++*pos; | |
8139 | return (void *)2; | |
8140 | } | |
8141 | if (l > 0x10000) | |
1da177e4 LT |
8142 | return NULL; |
8143 | if (!l--) | |
8144 | /* header */ | |
8145 | return (void*)1; | |
8146 | ||
8147 | spin_lock(&all_mddevs_lock); | |
8148 | list_for_each(tmp,&all_mddevs) | |
8149 | if (!l--) { | |
fd01b88c | 8150 | mddev = list_entry(tmp, struct mddev, all_mddevs); |
12a6caf2 CH |
8151 | if (!mddev_get(mddev)) |
8152 | continue; | |
1da177e4 LT |
8153 | spin_unlock(&all_mddevs_lock); |
8154 | return mddev; | |
8155 | } | |
8156 | spin_unlock(&all_mddevs_lock); | |
8157 | if (!l--) | |
8158 | return (void*)2;/* tail */ | |
8159 | return NULL; | |
8160 | } | |
8161 | ||
8162 | static void *md_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
8163 | { | |
8164 | struct list_head *tmp; | |
fd01b88c | 8165 | struct mddev *next_mddev, *mddev = v; |
12a6caf2 | 8166 | struct mddev *to_put = NULL; |
f72ffdd6 | 8167 | |
1da177e4 LT |
8168 | ++*pos; |
8169 | if (v == (void*)2) | |
8170 | return NULL; | |
8171 | ||
8172 | spin_lock(&all_mddevs_lock); | |
12a6caf2 | 8173 | if (v == (void*)1) { |
1da177e4 | 8174 | tmp = all_mddevs.next; |
12a6caf2 CH |
8175 | } else { |
8176 | to_put = mddev; | |
1da177e4 | 8177 | tmp = mddev->all_mddevs.next; |
f72ffdd6 | 8178 | } |
12a6caf2 CH |
8179 | |
8180 | for (;;) { | |
8181 | if (tmp == &all_mddevs) { | |
8182 | next_mddev = (void*)2; | |
8183 | *pos = 0x10000; | |
8184 | break; | |
8185 | } | |
8186 | next_mddev = list_entry(tmp, struct mddev, all_mddevs); | |
8187 | if (mddev_get(next_mddev)) | |
8188 | break; | |
8189 | mddev = next_mddev; | |
8190 | tmp = mddev->all_mddevs.next; | |
c0250d16 | 8191 | } |
1da177e4 LT |
8192 | spin_unlock(&all_mddevs_lock); |
8193 | ||
12a6caf2 | 8194 | if (to_put) |
1da177e4 LT |
8195 | mddev_put(mddev); |
8196 | return next_mddev; | |
8197 | ||
8198 | } | |
8199 | ||
8200 | static void md_seq_stop(struct seq_file *seq, void *v) | |
8201 | { | |
fd01b88c | 8202 | struct mddev *mddev = v; |
1da177e4 LT |
8203 | |
8204 | if (mddev && v != (void*)1 && v != (void*)2) | |
8205 | mddev_put(mddev); | |
8206 | } | |
8207 | ||
8208 | static int md_seq_show(struct seq_file *seq, void *v) | |
8209 | { | |
fd01b88c | 8210 | struct mddev *mddev = v; |
dd8ac336 | 8211 | sector_t sectors; |
3cb03002 | 8212 | struct md_rdev *rdev; |
1da177e4 LT |
8213 | |
8214 | if (v == (void*)1) { | |
84fc4b56 | 8215 | struct md_personality *pers; |
1da177e4 LT |
8216 | seq_printf(seq, "Personalities : "); |
8217 | spin_lock(&pers_lock); | |
2604b703 N |
8218 | list_for_each_entry(pers, &pers_list, list) |
8219 | seq_printf(seq, "[%s] ", pers->name); | |
1da177e4 LT |
8220 | |
8221 | spin_unlock(&pers_lock); | |
8222 | seq_printf(seq, "\n"); | |
f1514638 | 8223 | seq->poll_event = atomic_read(&md_event_count); |
1da177e4 LT |
8224 | return 0; |
8225 | } | |
8226 | if (v == (void*)2) { | |
8227 | status_unused(seq); | |
8228 | return 0; | |
8229 | } | |
8230 | ||
36d091f4 | 8231 | spin_lock(&mddev->lock); |
1da177e4 LT |
8232 | if (mddev->pers || mddev->raid_disks || !list_empty(&mddev->disks)) { |
8233 | seq_printf(seq, "%s : %sactive", mdname(mddev), | |
8234 | mddev->pers ? "" : "in"); | |
8235 | if (mddev->pers) { | |
f97a5528 | 8236 | if (mddev->ro == MD_RDONLY) |
1da177e4 | 8237 | seq_printf(seq, " (read-only)"); |
f97a5528 | 8238 | if (mddev->ro == MD_AUTO_READ) |
52720ae7 | 8239 | seq_printf(seq, " (auto-read-only)"); |
1da177e4 LT |
8240 | seq_printf(seq, " %s", mddev->pers->name); |
8241 | } | |
8242 | ||
dd8ac336 | 8243 | sectors = 0; |
f97fcad3 N |
8244 | rcu_read_lock(); |
8245 | rdev_for_each_rcu(rdev, mddev) { | |
913cce5a CH |
8246 | seq_printf(seq, " %pg[%d]", rdev->bdev, rdev->desc_nr); |
8247 | ||
8ddf9efe N |
8248 | if (test_bit(WriteMostly, &rdev->flags)) |
8249 | seq_printf(seq, "(W)"); | |
9efdca16 SL |
8250 | if (test_bit(Journal, &rdev->flags)) |
8251 | seq_printf(seq, "(J)"); | |
b2d444d7 | 8252 | if (test_bit(Faulty, &rdev->flags)) { |
1da177e4 LT |
8253 | seq_printf(seq, "(F)"); |
8254 | continue; | |
2d78f8c4 N |
8255 | } |
8256 | if (rdev->raid_disk < 0) | |
b325a32e | 8257 | seq_printf(seq, "(S)"); /* spare */ |
2d78f8c4 N |
8258 | if (test_bit(Replacement, &rdev->flags)) |
8259 | seq_printf(seq, "(R)"); | |
dd8ac336 | 8260 | sectors += rdev->sectors; |
1da177e4 | 8261 | } |
f97fcad3 | 8262 | rcu_read_unlock(); |
1da177e4 LT |
8263 | |
8264 | if (!list_empty(&mddev->disks)) { | |
8265 | if (mddev->pers) | |
8266 | seq_printf(seq, "\n %llu blocks", | |
f233ea5c AN |
8267 | (unsigned long long) |
8268 | mddev->array_sectors / 2); | |
1da177e4 LT |
8269 | else |
8270 | seq_printf(seq, "\n %llu blocks", | |
dd8ac336 | 8271 | (unsigned long long)sectors / 2); |
1da177e4 | 8272 | } |
1cd6bf19 N |
8273 | if (mddev->persistent) { |
8274 | if (mddev->major_version != 0 || | |
8275 | mddev->minor_version != 90) { | |
8276 | seq_printf(seq," super %d.%d", | |
8277 | mddev->major_version, | |
8278 | mddev->minor_version); | |
8279 | } | |
e691063a N |
8280 | } else if (mddev->external) |
8281 | seq_printf(seq, " super external:%s", | |
8282 | mddev->metadata_type); | |
8283 | else | |
1cd6bf19 | 8284 | seq_printf(seq, " super non-persistent"); |
1da177e4 LT |
8285 | |
8286 | if (mddev->pers) { | |
d710e138 | 8287 | mddev->pers->status(seq, mddev); |
f72ffdd6 | 8288 | seq_printf(seq, "\n "); |
8e1b39d6 | 8289 | if (mddev->pers->sync_request) { |
f7851be7 | 8290 | if (status_resync(seq, mddev)) |
8e1b39d6 | 8291 | seq_printf(seq, "\n "); |
8e1b39d6 | 8292 | } |
32a7627c N |
8293 | } else |
8294 | seq_printf(seq, "\n "); | |
8295 | ||
e64e4018 | 8296 | md_bitmap_status(seq, mddev->bitmap); |
1da177e4 LT |
8297 | |
8298 | seq_printf(seq, "\n"); | |
8299 | } | |
36d091f4 | 8300 | spin_unlock(&mddev->lock); |
f72ffdd6 | 8301 | |
1da177e4 LT |
8302 | return 0; |
8303 | } | |
8304 | ||
110518bc | 8305 | static const struct seq_operations md_seq_ops = { |
1da177e4 LT |
8306 | .start = md_seq_start, |
8307 | .next = md_seq_next, | |
8308 | .stop = md_seq_stop, | |
8309 | .show = md_seq_show, | |
8310 | }; | |
8311 | ||
8312 | static int md_seq_open(struct inode *inode, struct file *file) | |
8313 | { | |
f1514638 | 8314 | struct seq_file *seq; |
1da177e4 LT |
8315 | int error; |
8316 | ||
8317 | error = seq_open(file, &md_seq_ops); | |
d7603b7e | 8318 | if (error) |
f1514638 KS |
8319 | return error; |
8320 | ||
8321 | seq = file->private_data; | |
8322 | seq->poll_event = atomic_read(&md_event_count); | |
1da177e4 LT |
8323 | return error; |
8324 | } | |
8325 | ||
e2f23b60 | 8326 | static int md_unloading; |
afc9a42b | 8327 | static __poll_t mdstat_poll(struct file *filp, poll_table *wait) |
d7603b7e | 8328 | { |
f1514638 | 8329 | struct seq_file *seq = filp->private_data; |
afc9a42b | 8330 | __poll_t mask; |
d7603b7e | 8331 | |
e2f23b60 | 8332 | if (md_unloading) |
a9a08845 | 8333 | return EPOLLIN|EPOLLRDNORM|EPOLLERR|EPOLLPRI; |
d7603b7e N |
8334 | poll_wait(filp, &md_event_waiters, wait); |
8335 | ||
8336 | /* always allow read */ | |
a9a08845 | 8337 | mask = EPOLLIN | EPOLLRDNORM; |
d7603b7e | 8338 | |
f1514638 | 8339 | if (seq->poll_event != atomic_read(&md_event_count)) |
a9a08845 | 8340 | mask |= EPOLLERR | EPOLLPRI; |
d7603b7e N |
8341 | return mask; |
8342 | } | |
8343 | ||
97a32539 AD |
8344 | static const struct proc_ops mdstat_proc_ops = { |
8345 | .proc_open = md_seq_open, | |
8346 | .proc_read = seq_read, | |
8347 | .proc_lseek = seq_lseek, | |
8348 | .proc_release = seq_release, | |
8349 | .proc_poll = mdstat_poll, | |
1da177e4 LT |
8350 | }; |
8351 | ||
84fc4b56 | 8352 | int register_md_personality(struct md_personality *p) |
1da177e4 | 8353 | { |
9d48739e N |
8354 | pr_debug("md: %s personality registered for level %d\n", |
8355 | p->name, p->level); | |
1da177e4 | 8356 | spin_lock(&pers_lock); |
2604b703 | 8357 | list_add_tail(&p->list, &pers_list); |
1da177e4 LT |
8358 | spin_unlock(&pers_lock); |
8359 | return 0; | |
8360 | } | |
6c144d31 | 8361 | EXPORT_SYMBOL(register_md_personality); |
1da177e4 | 8362 | |
84fc4b56 | 8363 | int unregister_md_personality(struct md_personality *p) |
1da177e4 | 8364 | { |
9d48739e | 8365 | pr_debug("md: %s personality unregistered\n", p->name); |
1da177e4 | 8366 | spin_lock(&pers_lock); |
2604b703 | 8367 | list_del_init(&p->list); |
1da177e4 LT |
8368 | spin_unlock(&pers_lock); |
8369 | return 0; | |
8370 | } | |
6c144d31 | 8371 | EXPORT_SYMBOL(unregister_md_personality); |
1da177e4 | 8372 | |
6022e75b N |
8373 | int register_md_cluster_operations(struct md_cluster_operations *ops, |
8374 | struct module *module) | |
edb39c9d | 8375 | { |
6022e75b | 8376 | int ret = 0; |
edb39c9d | 8377 | spin_lock(&pers_lock); |
6022e75b N |
8378 | if (md_cluster_ops != NULL) |
8379 | ret = -EALREADY; | |
8380 | else { | |
8381 | md_cluster_ops = ops; | |
8382 | md_cluster_mod = module; | |
8383 | } | |
edb39c9d | 8384 | spin_unlock(&pers_lock); |
6022e75b | 8385 | return ret; |
edb39c9d GR |
8386 | } |
8387 | EXPORT_SYMBOL(register_md_cluster_operations); | |
8388 | ||
8389 | int unregister_md_cluster_operations(void) | |
8390 | { | |
8391 | spin_lock(&pers_lock); | |
8392 | md_cluster_ops = NULL; | |
8393 | spin_unlock(&pers_lock); | |
8394 | return 0; | |
8395 | } | |
8396 | EXPORT_SYMBOL(unregister_md_cluster_operations); | |
8397 | ||
8398 | int md_setup_cluster(struct mddev *mddev, int nodes) | |
8399 | { | |
7c9d5c54 | 8400 | int ret; |
47a7b0d8 GJ |
8401 | if (!md_cluster_ops) |
8402 | request_module("md-cluster"); | |
edb39c9d | 8403 | spin_lock(&pers_lock); |
47a7b0d8 | 8404 | /* ensure module won't be unloaded */ |
edb39c9d | 8405 | if (!md_cluster_ops || !try_module_get(md_cluster_mod)) { |
dd3dc5f4 | 8406 | pr_warn("can't find md-cluster module or get its reference.\n"); |
edb39c9d GR |
8407 | spin_unlock(&pers_lock); |
8408 | return -ENOENT; | |
8409 | } | |
8410 | spin_unlock(&pers_lock); | |
8411 | ||
7c9d5c54 ZH |
8412 | ret = md_cluster_ops->join(mddev, nodes); |
8413 | if (!ret) | |
8414 | mddev->safemode_delay = 0; | |
8415 | return ret; | |
edb39c9d GR |
8416 | } |
8417 | ||
8418 | void md_cluster_stop(struct mddev *mddev) | |
8419 | { | |
c4ce867f GR |
8420 | if (!md_cluster_ops) |
8421 | return; | |
edb39c9d GR |
8422 | md_cluster_ops->leave(mddev); |
8423 | module_put(md_cluster_mod); | |
8424 | } | |
8425 | ||
fd01b88c | 8426 | static int is_mddev_idle(struct mddev *mddev, int init) |
1da177e4 | 8427 | { |
f72ffdd6 | 8428 | struct md_rdev *rdev; |
1da177e4 | 8429 | int idle; |
eea1bf38 | 8430 | int curr_events; |
1da177e4 LT |
8431 | |
8432 | idle = 1; | |
4b80991c N |
8433 | rcu_read_lock(); |
8434 | rdev_for_each_rcu(rdev, mddev) { | |
4245e52d | 8435 | struct gendisk *disk = rdev->bdev->bd_disk; |
8446fe92 | 8436 | curr_events = (int)part_stat_read_accum(disk->part0, sectors) - |
eea1bf38 | 8437 | atomic_read(&disk->sync_io); |
713f6ab1 N |
8438 | /* sync IO will cause sync_io to increase before the disk_stats |
8439 | * as sync_io is counted when a request starts, and | |
8440 | * disk_stats is counted when it completes. | |
8441 | * So resync activity will cause curr_events to be smaller than | |
8442 | * when there was no such activity. | |
8443 | * non-sync IO will cause disk_stat to increase without | |
8444 | * increasing sync_io so curr_events will (eventually) | |
8445 | * be larger than it was before. Once it becomes | |
8446 | * substantially larger, the test below will cause | |
8447 | * the array to appear non-idle, and resync will slow | |
8448 | * down. | |
8449 | * If there is a lot of outstanding resync activity when | |
8450 | * we set last_event to curr_events, then all that activity | |
8451 | * completing might cause the array to appear non-idle | |
8452 | * and resync will be slowed down even though there might | |
8453 | * not have been non-resync activity. This will only | |
8454 | * happen once though. 'last_events' will soon reflect | |
8455 | * the state where there is little or no outstanding | |
8456 | * resync requests, and further resync activity will | |
8457 | * always make curr_events less than last_events. | |
c0e48521 | 8458 | * |
1da177e4 | 8459 | */ |
eea1bf38 | 8460 | if (init || curr_events - rdev->last_events > 64) { |
1da177e4 LT |
8461 | rdev->last_events = curr_events; |
8462 | idle = 0; | |
8463 | } | |
8464 | } | |
4b80991c | 8465 | rcu_read_unlock(); |
1da177e4 LT |
8466 | return idle; |
8467 | } | |
8468 | ||
fd01b88c | 8469 | void md_done_sync(struct mddev *mddev, int blocks, int ok) |
1da177e4 LT |
8470 | { |
8471 | /* another "blocks" (512byte) blocks have been synced */ | |
8472 | atomic_sub(blocks, &mddev->recovery_active); | |
8473 | wake_up(&mddev->recovery_wait); | |
8474 | if (!ok) { | |
dfc70645 | 8475 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
0a19caab | 8476 | set_bit(MD_RECOVERY_ERROR, &mddev->recovery); |
1da177e4 LT |
8477 | md_wakeup_thread(mddev->thread); |
8478 | // stop recovery, signal do_sync .... | |
8479 | } | |
8480 | } | |
6c144d31 | 8481 | EXPORT_SYMBOL(md_done_sync); |
1da177e4 | 8482 | |
06d91a5f N |
8483 | /* md_write_start(mddev, bi) |
8484 | * If we need to update some array metadata (e.g. 'active' flag | |
3d310eb7 N |
8485 | * in superblock) before writing, schedule a superblock update |
8486 | * and wait for it to complete. | |
cc27b0c7 N |
8487 | * A return value of 'false' means that the write wasn't recorded |
8488 | * and cannot proceed as the array is being suspend. | |
06d91a5f | 8489 | */ |
cc27b0c7 | 8490 | bool md_write_start(struct mddev *mddev, struct bio *bi) |
1da177e4 | 8491 | { |
0fd62b86 | 8492 | int did_change = 0; |
4b6c1060 | 8493 | |
06d91a5f | 8494 | if (bio_data_dir(bi) != WRITE) |
cc27b0c7 | 8495 | return true; |
06d91a5f | 8496 | |
f97a5528 YB |
8497 | BUG_ON(mddev->ro == MD_RDONLY); |
8498 | if (mddev->ro == MD_AUTO_READ) { | |
f91de92e | 8499 | /* need to switch to read/write */ |
f97a5528 | 8500 | mddev->ro = MD_RDWR; |
f91de92e N |
8501 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
8502 | md_wakeup_thread(mddev->thread); | |
25156198 | 8503 | md_wakeup_thread(mddev->sync_thread); |
0fd62b86 | 8504 | did_change = 1; |
f91de92e | 8505 | } |
4ad23a97 N |
8506 | rcu_read_lock(); |
8507 | percpu_ref_get(&mddev->writes_pending); | |
55cc39f3 | 8508 | smp_mb(); /* Match smp_mb in set_in_sync() */ |
31a59e34 N |
8509 | if (mddev->safemode == 1) |
8510 | mddev->safemode = 0; | |
4ad23a97 | 8511 | /* sync_checkers is always 0 when writes_pending is in per-cpu mode */ |
81fe48e9 | 8512 | if (mddev->in_sync || mddev->sync_checkers) { |
85572d7c | 8513 | spin_lock(&mddev->lock); |
3d310eb7 N |
8514 | if (mddev->in_sync) { |
8515 | mddev->in_sync = 0; | |
2953079c SL |
8516 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8517 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
3d310eb7 | 8518 | md_wakeup_thread(mddev->thread); |
0fd62b86 | 8519 | did_change = 1; |
3d310eb7 | 8520 | } |
85572d7c | 8521 | spin_unlock(&mddev->lock); |
06d91a5f | 8522 | } |
4ad23a97 | 8523 | rcu_read_unlock(); |
0fd62b86 | 8524 | if (did_change) |
00bcb4ac | 8525 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
4b6c1060 HM |
8526 | if (!mddev->has_superblocks) |
8527 | return true; | |
09a44cc1 | 8528 | wait_event(mddev->sb_wait, |
d47c8ad2 | 8529 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags) || |
d1932913 | 8530 | is_md_suspended(mddev)); |
cc27b0c7 N |
8531 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) { |
8532 | percpu_ref_put(&mddev->writes_pending); | |
8533 | return false; | |
8534 | } | |
8535 | return true; | |
1da177e4 | 8536 | } |
6c144d31 | 8537 | EXPORT_SYMBOL(md_write_start); |
1da177e4 | 8538 | |
49728050 N |
8539 | /* md_write_inc can only be called when md_write_start() has |
8540 | * already been called at least once of the current request. | |
8541 | * It increments the counter and is useful when a single request | |
8542 | * is split into several parts. Each part causes an increment and | |
8543 | * so needs a matching md_write_end(). | |
8544 | * Unlike md_write_start(), it is safe to call md_write_inc() inside | |
8545 | * a spinlocked region. | |
8546 | */ | |
8547 | void md_write_inc(struct mddev *mddev, struct bio *bi) | |
8548 | { | |
8549 | if (bio_data_dir(bi) != WRITE) | |
8550 | return; | |
f97a5528 | 8551 | WARN_ON_ONCE(mddev->in_sync || !md_is_rdwr(mddev)); |
4ad23a97 | 8552 | percpu_ref_get(&mddev->writes_pending); |
49728050 N |
8553 | } |
8554 | EXPORT_SYMBOL(md_write_inc); | |
8555 | ||
fd01b88c | 8556 | void md_write_end(struct mddev *mddev) |
1da177e4 | 8557 | { |
4ad23a97 N |
8558 | percpu_ref_put(&mddev->writes_pending); |
8559 | ||
8560 | if (mddev->safemode == 2) | |
8561 | md_wakeup_thread(mddev->thread); | |
8562 | else if (mddev->safemode_delay) | |
8563 | /* The roundup() ensures this only performs locking once | |
8564 | * every ->safemode_delay jiffies | |
8565 | */ | |
8566 | mod_timer(&mddev->safemode_timer, | |
8567 | roundup(jiffies, mddev->safemode_delay) + | |
8568 | mddev->safemode_delay); | |
1da177e4 | 8569 | } |
4ad23a97 | 8570 | |
6c144d31 | 8571 | EXPORT_SYMBOL(md_write_end); |
1da177e4 | 8572 | |
cf78408f XN |
8573 | /* This is used by raid0 and raid10 */ |
8574 | void md_submit_discard_bio(struct mddev *mddev, struct md_rdev *rdev, | |
8575 | struct bio *bio, sector_t start, sector_t size) | |
8576 | { | |
8577 | struct bio *discard_bio = NULL; | |
8578 | ||
44abff2c | 8579 | if (__blkdev_issue_discard(rdev->bdev, start, size, GFP_NOIO, |
cf78408f XN |
8580 | &discard_bio) || !discard_bio) |
8581 | return; | |
8582 | ||
8583 | bio_chain(discard_bio, bio); | |
8584 | bio_clone_blkg_association(discard_bio, bio); | |
8585 | if (mddev->gendisk) | |
8586 | trace_block_bio_remap(discard_bio, | |
8587 | disk_devt(mddev->gendisk), | |
8588 | bio->bi_iter.bi_sector); | |
8589 | submit_bio_noacct(discard_bio); | |
8590 | } | |
8591 | EXPORT_SYMBOL_GPL(md_submit_discard_bio); | |
8592 | ||
0c031fd3 XN |
8593 | int acct_bioset_init(struct mddev *mddev) |
8594 | { | |
8595 | int err = 0; | |
8596 | ||
8597 | if (!bioset_initialized(&mddev->io_acct_set)) | |
8598 | err = bioset_init(&mddev->io_acct_set, BIO_POOL_SIZE, | |
8599 | offsetof(struct md_io_acct, bio_clone), 0); | |
8600 | return err; | |
8601 | } | |
8602 | EXPORT_SYMBOL_GPL(acct_bioset_init); | |
8603 | ||
8604 | void acct_bioset_exit(struct mddev *mddev) | |
8605 | { | |
8606 | bioset_exit(&mddev->io_acct_set); | |
8607 | } | |
8608 | EXPORT_SYMBOL_GPL(acct_bioset_exit); | |
8609 | ||
10764815 GJ |
8610 | static void md_end_io_acct(struct bio *bio) |
8611 | { | |
8612 | struct md_io_acct *md_io_acct = bio->bi_private; | |
8613 | struct bio *orig_bio = md_io_acct->orig_bio; | |
76fed014 | 8614 | struct mddev *mddev = md_io_acct->mddev; |
10764815 GJ |
8615 | |
8616 | orig_bio->bi_status = bio->bi_status; | |
8617 | ||
8618 | bio_end_io_acct(orig_bio, md_io_acct->start_time); | |
8619 | bio_put(bio); | |
8620 | bio_endio(orig_bio); | |
76fed014 XN |
8621 | |
8622 | percpu_ref_put(&mddev->active_io); | |
10764815 GJ |
8623 | } |
8624 | ||
daee2024 GJ |
8625 | /* |
8626 | * Used by personalities that don't already clone the bio and thus can't | |
8627 | * easily add the timestamp to their extended bio structure. | |
8628 | */ | |
10764815 GJ |
8629 | void md_account_bio(struct mddev *mddev, struct bio **bio) |
8630 | { | |
abfc426d | 8631 | struct block_device *bdev = (*bio)->bi_bdev; |
10764815 GJ |
8632 | struct md_io_acct *md_io_acct; |
8633 | struct bio *clone; | |
8634 | ||
abfc426d | 8635 | if (!blk_queue_io_stat(bdev->bd_disk->queue)) |
10764815 GJ |
8636 | return; |
8637 | ||
76fed014 XN |
8638 | percpu_ref_get(&mddev->active_io); |
8639 | ||
abfc426d | 8640 | clone = bio_alloc_clone(bdev, *bio, GFP_NOIO, &mddev->io_acct_set); |
10764815 GJ |
8641 | md_io_acct = container_of(clone, struct md_io_acct, bio_clone); |
8642 | md_io_acct->orig_bio = *bio; | |
8643 | md_io_acct->start_time = bio_start_io_acct(*bio); | |
76fed014 | 8644 | md_io_acct->mddev = mddev; |
10764815 GJ |
8645 | |
8646 | clone->bi_end_io = md_end_io_acct; | |
8647 | clone->bi_private = md_io_acct; | |
8648 | *bio = clone; | |
8649 | } | |
8650 | EXPORT_SYMBOL_GPL(md_account_bio); | |
8651 | ||
2a2275d6 N |
8652 | /* md_allow_write(mddev) |
8653 | * Calling this ensures that the array is marked 'active' so that writes | |
8654 | * may proceed without blocking. It is important to call this before | |
8655 | * attempting a GFP_KERNEL allocation while holding the mddev lock. | |
8656 | * Must be called with mddev_lock held. | |
8657 | */ | |
2214c260 | 8658 | void md_allow_write(struct mddev *mddev) |
2a2275d6 N |
8659 | { |
8660 | if (!mddev->pers) | |
2214c260 | 8661 | return; |
f97a5528 | 8662 | if (!md_is_rdwr(mddev)) |
2214c260 | 8663 | return; |
1a0fd497 | 8664 | if (!mddev->pers->sync_request) |
2214c260 | 8665 | return; |
2a2275d6 | 8666 | |
85572d7c | 8667 | spin_lock(&mddev->lock); |
2a2275d6 N |
8668 | if (mddev->in_sync) { |
8669 | mddev->in_sync = 0; | |
2953079c SL |
8670 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8671 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
2a2275d6 N |
8672 | if (mddev->safemode_delay && |
8673 | mddev->safemode == 0) | |
8674 | mddev->safemode = 1; | |
85572d7c | 8675 | spin_unlock(&mddev->lock); |
2a2275d6 | 8676 | md_update_sb(mddev, 0); |
00bcb4ac | 8677 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
2214c260 AP |
8678 | /* wait for the dirty state to be recorded in the metadata */ |
8679 | wait_event(mddev->sb_wait, | |
2214c260 | 8680 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
2a2275d6 | 8681 | } else |
85572d7c | 8682 | spin_unlock(&mddev->lock); |
2a2275d6 N |
8683 | } |
8684 | EXPORT_SYMBOL_GPL(md_allow_write); | |
8685 | ||
1da177e4 LT |
8686 | #define SYNC_MARKS 10 |
8687 | #define SYNC_MARK_STEP (3*HZ) | |
54f89341 | 8688 | #define UPDATE_FREQUENCY (5*60*HZ) |
4ed8731d | 8689 | void md_do_sync(struct md_thread *thread) |
1da177e4 | 8690 | { |
4ed8731d | 8691 | struct mddev *mddev = thread->mddev; |
fd01b88c | 8692 | struct mddev *mddev2; |
e5b521ee | 8693 | unsigned int currspeed = 0, window; |
ac7e50a3 | 8694 | sector_t max_sectors,j, io_sectors, recovery_done; |
1da177e4 | 8695 | unsigned long mark[SYNC_MARKS]; |
54f89341 | 8696 | unsigned long update_time; |
1da177e4 LT |
8697 | sector_t mark_cnt[SYNC_MARKS]; |
8698 | int last_mark,m; | |
1da177e4 | 8699 | sector_t last_check; |
57afd89f | 8700 | int skipped = 0; |
3cb03002 | 8701 | struct md_rdev *rdev; |
c4a39551 | 8702 | char *desc, *action = NULL; |
7c2c57c9 | 8703 | struct blk_plug plug; |
41a9a0dc | 8704 | int ret; |
1da177e4 LT |
8705 | |
8706 | /* just incase thread restarts... */ | |
d5d885fd SL |
8707 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
8708 | test_bit(MD_RECOVERY_WAIT, &mddev->recovery)) | |
1da177e4 | 8709 | return; |
f97a5528 | 8710 | if (!md_is_rdwr(mddev)) {/* never try to sync a read-only array */ |
3991b31e | 8711 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
5fd6c1dc | 8712 | return; |
3991b31e | 8713 | } |
1da177e4 | 8714 | |
41a9a0dc GJ |
8715 | if (mddev_is_clustered(mddev)) { |
8716 | ret = md_cluster_ops->resync_start(mddev); | |
8717 | if (ret) | |
8718 | goto skip; | |
8719 | ||
bb8bf15b | 8720 | set_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags); |
41a9a0dc GJ |
8721 | if (!(test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8722 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) || | |
8723 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) | |
8724 | && ((unsigned long long)mddev->curr_resync_completed | |
8725 | < (unsigned long long)mddev->resync_max_sectors)) | |
8726 | goto skip; | |
8727 | } | |
8728 | ||
61df9d91 | 8729 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
c4a39551 | 8730 | if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) { |
61df9d91 | 8731 | desc = "data-check"; |
c4a39551 JB |
8732 | action = "check"; |
8733 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
61df9d91 | 8734 | desc = "requested-resync"; |
c4a39551 JB |
8735 | action = "repair"; |
8736 | } else | |
61df9d91 N |
8737 | desc = "resync"; |
8738 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
8739 | desc = "reshape"; | |
8740 | else | |
8741 | desc = "recovery"; | |
8742 | ||
c4a39551 JB |
8743 | mddev->last_sync_action = action ?: desc; |
8744 | ||
eac58d08 | 8745 | /* |
1da177e4 LT |
8746 | * Before starting a resync we must have set curr_resync to |
8747 | * 2, and then checked that every "conflicting" array has curr_resync | |
8748 | * less than ours. When we find one that is the same or higher | |
8749 | * we wait on resync_wait. To avoid deadlock, we reduce curr_resync | |
8750 | * to 1 if we choose to yield (based arbitrarily on address of mddev structure). | |
8751 | * This will mean we have to start checking from the beginning again. | |
8752 | * | |
8753 | */ | |
8754 | ||
8755 | do { | |
c622ca54 | 8756 | int mddev2_minor = -1; |
eac58d08 | 8757 | mddev->curr_resync = MD_RESYNC_DELAYED; |
1da177e4 LT |
8758 | |
8759 | try_again: | |
404e4b43 | 8760 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
1da177e4 | 8761 | goto skip; |
b0e706a1 CH |
8762 | spin_lock(&all_mddevs_lock); |
8763 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) { | |
12a6caf2 CH |
8764 | if (test_bit(MD_DELETED, &mddev2->flags)) |
8765 | continue; | |
1da177e4 LT |
8766 | if (mddev2 == mddev) |
8767 | continue; | |
90b08710 BS |
8768 | if (!mddev->parallel_resync |
8769 | && mddev2->curr_resync | |
8770 | && match_mddev_units(mddev, mddev2)) { | |
1da177e4 | 8771 | DEFINE_WAIT(wq); |
eac58d08 LG |
8772 | if (mddev < mddev2 && |
8773 | mddev->curr_resync == MD_RESYNC_DELAYED) { | |
1da177e4 | 8774 | /* arbitrarily yield */ |
eac58d08 | 8775 | mddev->curr_resync = MD_RESYNC_YIELDED; |
1da177e4 LT |
8776 | wake_up(&resync_wait); |
8777 | } | |
eac58d08 LG |
8778 | if (mddev > mddev2 && |
8779 | mddev->curr_resync == MD_RESYNC_YIELDED) | |
1da177e4 LT |
8780 | /* no need to wait here, we can wait the next |
8781 | * time 'round when curr_resync == 2 | |
8782 | */ | |
8783 | continue; | |
9744197c N |
8784 | /* We need to wait 'interruptible' so as not to |
8785 | * contribute to the load average, and not to | |
8786 | * be caught by 'softlockup' | |
8787 | */ | |
8788 | prepare_to_wait(&resync_wait, &wq, TASK_INTERRUPTIBLE); | |
c91abf5a | 8789 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
8712e553 | 8790 | mddev2->curr_resync >= mddev->curr_resync) { |
c622ca54 AP |
8791 | if (mddev2_minor != mddev2->md_minor) { |
8792 | mddev2_minor = mddev2->md_minor; | |
9d48739e N |
8793 | pr_info("md: delaying %s of %s until %s has finished (they share one or more physical units)\n", |
8794 | desc, mdname(mddev), | |
8795 | mdname(mddev2)); | |
c622ca54 | 8796 | } |
b0e706a1 CH |
8797 | spin_unlock(&all_mddevs_lock); |
8798 | ||
9744197c N |
8799 | if (signal_pending(current)) |
8800 | flush_signals(current); | |
1da177e4 LT |
8801 | schedule(); |
8802 | finish_wait(&resync_wait, &wq); | |
8803 | goto try_again; | |
8804 | } | |
8805 | finish_wait(&resync_wait, &wq); | |
8806 | } | |
8807 | } | |
b0e706a1 | 8808 | spin_unlock(&all_mddevs_lock); |
eac58d08 | 8809 | } while (mddev->curr_resync < MD_RESYNC_DELAYED); |
1da177e4 | 8810 | |
5fd6c1dc | 8811 | j = 0; |
9d88883e | 8812 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
1da177e4 | 8813 | /* resync follows the size requested by the personality, |
57afd89f | 8814 | * which defaults to physical size, but can be virtual size |
1da177e4 LT |
8815 | */ |
8816 | max_sectors = mddev->resync_max_sectors; | |
7f7583d4 | 8817 | atomic64_set(&mddev->resync_mismatches, 0); |
5fd6c1dc | 8818 | /* we don't use the checkpoint if there's a bitmap */ |
5e96ee65 NB |
8819 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) |
8820 | j = mddev->resync_min; | |
8821 | else if (!mddev->bitmap) | |
5fd6c1dc | 8822 | j = mddev->recovery_cp; |
5e96ee65 | 8823 | |
cb9ee154 | 8824 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) { |
c804cdec | 8825 | max_sectors = mddev->resync_max_sectors; |
cb9ee154 GJ |
8826 | /* |
8827 | * If the original node aborts reshaping then we continue the | |
8828 | * reshaping, so set j again to avoid restart reshape from the | |
8829 | * first beginning | |
8830 | */ | |
8831 | if (mddev_is_clustered(mddev) && | |
8832 | mddev->reshape_position != MaxSector) | |
8833 | j = mddev->reshape_position; | |
8834 | } else { | |
1da177e4 | 8835 | /* recovery follows the physical size of devices */ |
58c0fed4 | 8836 | max_sectors = mddev->dev_sectors; |
5fd6c1dc | 8837 | j = MaxSector; |
4e59ca7d | 8838 | rcu_read_lock(); |
dafb20fa | 8839 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 8840 | if (rdev->raid_disk >= 0 && |
f2076e7d | 8841 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
8842 | !test_bit(Faulty, &rdev->flags) && |
8843 | !test_bit(In_sync, &rdev->flags) && | |
8844 | rdev->recovery_offset < j) | |
8845 | j = rdev->recovery_offset; | |
4e59ca7d | 8846 | rcu_read_unlock(); |
133d4527 N |
8847 | |
8848 | /* If there is a bitmap, we need to make sure all | |
8849 | * writes that started before we added a spare | |
8850 | * complete before we start doing a recovery. | |
8851 | * Otherwise the write might complete and (via | |
8852 | * bitmap_endwrite) set a bit in the bitmap after the | |
8853 | * recovery has checked that bit and skipped that | |
8854 | * region. | |
8855 | */ | |
8856 | if (mddev->bitmap) { | |
8857 | mddev->pers->quiesce(mddev, 1); | |
8858 | mddev->pers->quiesce(mddev, 0); | |
8859 | } | |
5fd6c1dc | 8860 | } |
1da177e4 | 8861 | |
9d48739e N |
8862 | pr_info("md: %s of RAID array %s\n", desc, mdname(mddev)); |
8863 | pr_debug("md: minimum _guaranteed_ speed: %d KB/sec/disk.\n", speed_min(mddev)); | |
8864 | pr_debug("md: using maximum available idle IO bandwidth (but not more than %d KB/sec) for %s.\n", | |
8865 | speed_max(mddev), desc); | |
1da177e4 | 8866 | |
eea1bf38 | 8867 | is_mddev_idle(mddev, 1); /* this initializes IO event counters */ |
5fd6c1dc | 8868 | |
57afd89f | 8869 | io_sectors = 0; |
1da177e4 LT |
8870 | for (m = 0; m < SYNC_MARKS; m++) { |
8871 | mark[m] = jiffies; | |
57afd89f | 8872 | mark_cnt[m] = io_sectors; |
1da177e4 LT |
8873 | } |
8874 | last_mark = 0; | |
8875 | mddev->resync_mark = mark[last_mark]; | |
8876 | mddev->resync_mark_cnt = mark_cnt[last_mark]; | |
8877 | ||
8878 | /* | |
8879 | * Tune reconstruction: | |
8880 | */ | |
e5b521ee | 8881 | window = 32 * (PAGE_SIZE / 512); |
9d48739e N |
8882 | pr_debug("md: using %dk window, over a total of %lluk.\n", |
8883 | window/2, (unsigned long long)max_sectors/2); | |
1da177e4 LT |
8884 | |
8885 | atomic_set(&mddev->recovery_active, 0); | |
1da177e4 LT |
8886 | last_check = 0; |
8887 | ||
ed821cf8 | 8888 | if (j >= MD_RESYNC_ACTIVE) { |
9d48739e N |
8889 | pr_debug("md: resuming %s of %s from checkpoint.\n", |
8890 | desc, mdname(mddev)); | |
1da177e4 | 8891 | mddev->curr_resync = j; |
72f36d59 | 8892 | } else |
eac58d08 | 8893 | mddev->curr_resync = MD_RESYNC_ACTIVE; /* no longer delayed */ |
75d3da43 | 8894 | mddev->curr_resync_completed = j; |
e1a86dbb | 8895 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
54679486 | 8896 | md_new_event(); |
54f89341 | 8897 | update_time = jiffies; |
1da177e4 | 8898 | |
7c2c57c9 | 8899 | blk_start_plug(&plug); |
1da177e4 | 8900 | while (j < max_sectors) { |
57afd89f | 8901 | sector_t sectors; |
1da177e4 | 8902 | |
57afd89f | 8903 | skipped = 0; |
97e4f42d | 8904 | |
7a91ee1f N |
8905 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8906 | ((mddev->curr_resync > mddev->curr_resync_completed && | |
8907 | (mddev->curr_resync - mddev->curr_resync_completed) | |
8908 | > (max_sectors >> 4)) || | |
54f89341 | 8909 | time_after_eq(jiffies, update_time + UPDATE_FREQUENCY) || |
7a91ee1f | 8910 | (j - mddev->curr_resync_completed)*2 |
c5e19d90 N |
8911 | >= mddev->resync_max - mddev->curr_resync_completed || |
8912 | mddev->curr_resync_completed > mddev->resync_max | |
7a91ee1f | 8913 | )) { |
97e4f42d | 8914 | /* time to update curr_resync_completed */ |
97e4f42d N |
8915 | wait_event(mddev->recovery_wait, |
8916 | atomic_read(&mddev->recovery_active) == 0); | |
75d3da43 | 8917 | mddev->curr_resync_completed = j; |
35d78c66 | 8918 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && |
8919 | j > mddev->recovery_cp) | |
8920 | mddev->recovery_cp = j; | |
54f89341 | 8921 | update_time = jiffies; |
2953079c | 8922 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
e1a86dbb | 8923 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
97e4f42d | 8924 | } |
acb180b0 | 8925 | |
c91abf5a N |
8926 | while (j >= mddev->resync_max && |
8927 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
e62e58a5 N |
8928 | /* As this condition is controlled by user-space, |
8929 | * we can block indefinitely, so use '_interruptible' | |
8930 | * to avoid triggering warnings. | |
8931 | */ | |
8932 | flush_signals(current); /* just in case */ | |
8933 | wait_event_interruptible(mddev->recovery_wait, | |
8934 | mddev->resync_max > j | |
c91abf5a N |
8935 | || test_bit(MD_RECOVERY_INTR, |
8936 | &mddev->recovery)); | |
e62e58a5 | 8937 | } |
acb180b0 | 8938 | |
c91abf5a N |
8939 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8940 | break; | |
acb180b0 | 8941 | |
09314799 | 8942 | sectors = mddev->pers->sync_request(mddev, j, &skipped); |
57afd89f | 8943 | if (sectors == 0) { |
dfc70645 | 8944 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
c91abf5a | 8945 | break; |
1da177e4 | 8946 | } |
57afd89f N |
8947 | |
8948 | if (!skipped) { /* actual IO requested */ | |
8949 | io_sectors += sectors; | |
8950 | atomic_add(sectors, &mddev->recovery_active); | |
8951 | } | |
8952 | ||
e875ecea N |
8953 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8954 | break; | |
8955 | ||
1da177e4 | 8956 | j += sectors; |
5ed1df2e N |
8957 | if (j > max_sectors) |
8958 | /* when skipping, extra large numbers can be returned. */ | |
8959 | j = max_sectors; | |
ed821cf8 | 8960 | if (j >= MD_RESYNC_ACTIVE) |
72f36d59 | 8961 | mddev->curr_resync = j; |
ff4e8d9a | 8962 | mddev->curr_mark_cnt = io_sectors; |
d7603b7e | 8963 | if (last_check == 0) |
e875ecea | 8964 | /* this is the earliest that rebuild will be |
d7603b7e N |
8965 | * visible in /proc/mdstat |
8966 | */ | |
54679486 | 8967 | md_new_event(); |
57afd89f N |
8968 | |
8969 | if (last_check + window > io_sectors || j == max_sectors) | |
1da177e4 LT |
8970 | continue; |
8971 | ||
57afd89f | 8972 | last_check = io_sectors; |
1da177e4 LT |
8973 | repeat: |
8974 | if (time_after_eq(jiffies, mark[last_mark] + SYNC_MARK_STEP )) { | |
8975 | /* step marks */ | |
8976 | int next = (last_mark+1) % SYNC_MARKS; | |
8977 | ||
8978 | mddev->resync_mark = mark[next]; | |
8979 | mddev->resync_mark_cnt = mark_cnt[next]; | |
8980 | mark[next] = jiffies; | |
57afd89f | 8981 | mark_cnt[next] = io_sectors - atomic_read(&mddev->recovery_active); |
1da177e4 LT |
8982 | last_mark = next; |
8983 | } | |
8984 | ||
c91abf5a N |
8985 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8986 | break; | |
1da177e4 LT |
8987 | |
8988 | /* | |
8989 | * this loop exits only if either when we are slower than | |
8990 | * the 'hard' speed limit, or the system was IO-idle for | |
8991 | * a jiffy. | |
8992 | * the system might be non-idle CPU-wise, but we only care | |
8993 | * about not overloading the IO subsystem. (things like an | |
8994 | * e2fsck being done on the RAID array should execute fast) | |
8995 | */ | |
1da177e4 LT |
8996 | cond_resched(); |
8997 | ||
ac7e50a3 XN |
8998 | recovery_done = io_sectors - atomic_read(&mddev->recovery_active); |
8999 | currspeed = ((unsigned long)(recovery_done - mddev->resync_mark_cnt))/2 | |
57afd89f | 9000 | /((jiffies-mddev->resync_mark)/HZ +1) +1; |
1da177e4 | 9001 | |
88202a0c | 9002 | if (currspeed > speed_min(mddev)) { |
ac8fa419 | 9003 | if (currspeed > speed_max(mddev)) { |
c0e48521 | 9004 | msleep(500); |
1da177e4 LT |
9005 | goto repeat; |
9006 | } | |
ac8fa419 N |
9007 | if (!is_mddev_idle(mddev, 0)) { |
9008 | /* | |
9009 | * Give other IO more of a chance. | |
9010 | * The faster the devices, the less we wait. | |
9011 | */ | |
9012 | wait_event(mddev->recovery_wait, | |
9013 | !atomic_read(&mddev->recovery_active)); | |
9014 | } | |
1da177e4 LT |
9015 | } |
9016 | } | |
9d48739e N |
9017 | pr_info("md: %s: %s %s.\n",mdname(mddev), desc, |
9018 | test_bit(MD_RECOVERY_INTR, &mddev->recovery) | |
9019 | ? "interrupted" : "done"); | |
1da177e4 LT |
9020 | /* |
9021 | * this also signals 'finished resyncing' to md_stop | |
9022 | */ | |
7c2c57c9 | 9023 | blk_finish_plug(&plug); |
1da177e4 LT |
9024 | wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active)); |
9025 | ||
5ed1df2e N |
9026 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9027 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
eac58d08 | 9028 | mddev->curr_resync >= MD_RESYNC_ACTIVE) { |
5ed1df2e | 9029 | mddev->curr_resync_completed = mddev->curr_resync; |
e1a86dbb | 9030 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
5ed1df2e | 9031 | } |
09314799 | 9032 | mddev->pers->sync_request(mddev, max_sectors, &skipped); |
1da177e4 | 9033 | |
dfc70645 | 9034 | if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) && |
1d1f25bf | 9035 | mddev->curr_resync > MD_RESYNC_ACTIVE) { |
5fd6c1dc N |
9036 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
9037 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
9038 | if (mddev->curr_resync >= mddev->recovery_cp) { | |
9d48739e N |
9039 | pr_debug("md: checkpointing %s of %s.\n", |
9040 | desc, mdname(mddev)); | |
0a19caab | 9041 | if (test_bit(MD_RECOVERY_ERROR, |
9042 | &mddev->recovery)) | |
9043 | mddev->recovery_cp = | |
9044 | mddev->curr_resync_completed; | |
9045 | else | |
9046 | mddev->recovery_cp = | |
9047 | mddev->curr_resync; | |
5fd6c1dc N |
9048 | } |
9049 | } else | |
9050 | mddev->recovery_cp = MaxSector; | |
9051 | } else { | |
9052 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) | |
9053 | mddev->curr_resync = MaxSector; | |
db0505d3 N |
9054 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9055 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) { | |
9056 | rcu_read_lock(); | |
9057 | rdev_for_each_rcu(rdev, mddev) | |
9058 | if (rdev->raid_disk >= 0 && | |
9059 | mddev->delta_disks >= 0 && | |
9060 | !test_bit(Journal, &rdev->flags) && | |
9061 | !test_bit(Faulty, &rdev->flags) && | |
9062 | !test_bit(In_sync, &rdev->flags) && | |
9063 | rdev->recovery_offset < mddev->curr_resync) | |
9064 | rdev->recovery_offset = mddev->curr_resync; | |
9065 | rcu_read_unlock(); | |
9066 | } | |
5fd6c1dc | 9067 | } |
1da177e4 | 9068 | } |
db91ff55 | 9069 | skip: |
bb8bf15b GJ |
9070 | /* set CHANGE_PENDING here since maybe another update is needed, |
9071 | * so other nodes are informed. It should be harmless for normal | |
9072 | * raid */ | |
2953079c SL |
9073 | set_mask_bits(&mddev->sb_flags, 0, |
9074 | BIT(MD_SB_CHANGE_PENDING) | BIT(MD_SB_CHANGE_DEVS)); | |
c186b128 | 9075 | |
8876391e BC |
9076 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9077 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
9078 | mddev->delta_disks > 0 && | |
9079 | mddev->pers->finish_reshape && | |
9080 | mddev->pers->size && | |
9081 | mddev->queue) { | |
9082 | mddev_lock_nointr(mddev); | |
9083 | md_set_array_sectors(mddev, mddev->pers->size(mddev, 0, 0)); | |
9084 | mddev_unlock(mddev); | |
2c247c51 CH |
9085 | if (!mddev_is_clustered(mddev)) |
9086 | set_capacity_and_notify(mddev->gendisk, | |
9087 | mddev->array_sectors); | |
8876391e BC |
9088 | } |
9089 | ||
23da422b | 9090 | spin_lock(&mddev->lock); |
c07b70ad N |
9091 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { |
9092 | /* We completed so min/max setting can be forgotten if used. */ | |
9093 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
9094 | mddev->resync_min = 0; | |
9095 | mddev->resync_max = MaxSector; | |
9096 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
9097 | mddev->resync_min = mddev->curr_resync_completed; | |
f7851be7 | 9098 | set_bit(MD_RECOVERY_DONE, &mddev->recovery); |
eac58d08 | 9099 | mddev->curr_resync = MD_RESYNC_NONE; |
23da422b N |
9100 | spin_unlock(&mddev->lock); |
9101 | ||
1da177e4 | 9102 | wake_up(&resync_wait); |
1da177e4 | 9103 | md_wakeup_thread(mddev->thread); |
c6207277 | 9104 | return; |
1da177e4 | 9105 | } |
29269553 | 9106 | EXPORT_SYMBOL_GPL(md_do_sync); |
1da177e4 | 9107 | |
746d3207 N |
9108 | static int remove_and_add_spares(struct mddev *mddev, |
9109 | struct md_rdev *this) | |
b4c4c7b8 | 9110 | { |
3cb03002 | 9111 | struct md_rdev *rdev; |
b4c4c7b8 | 9112 | int spares = 0; |
f2a371c5 | 9113 | int removed = 0; |
d787be40 | 9114 | bool remove_some = false; |
b4c4c7b8 | 9115 | |
39772f0a N |
9116 | if (this && test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
9117 | /* Mustn't remove devices when resync thread is running */ | |
9118 | return 0; | |
9119 | ||
d787be40 N |
9120 | rdev_for_each(rdev, mddev) { |
9121 | if ((this == NULL || rdev == this) && | |
9122 | rdev->raid_disk >= 0 && | |
9123 | !test_bit(Blocked, &rdev->flags) && | |
9124 | test_bit(Faulty, &rdev->flags) && | |
9125 | atomic_read(&rdev->nr_pending)==0) { | |
9126 | /* Faulty non-Blocked devices with nr_pending == 0 | |
9127 | * never get nr_pending incremented, | |
9128 | * never get Faulty cleared, and never get Blocked set. | |
9129 | * So we can synchronize_rcu now rather than once per device | |
9130 | */ | |
9131 | remove_some = true; | |
9132 | set_bit(RemoveSynchronized, &rdev->flags); | |
9133 | } | |
9134 | } | |
9135 | ||
9136 | if (remove_some) | |
9137 | synchronize_rcu(); | |
9138 | rdev_for_each(rdev, mddev) { | |
746d3207 N |
9139 | if ((this == NULL || rdev == this) && |
9140 | rdev->raid_disk >= 0 && | |
6bfe0b49 | 9141 | !test_bit(Blocked, &rdev->flags) && |
d787be40 | 9142 | ((test_bit(RemoveSynchronized, &rdev->flags) || |
f2076e7d SL |
9143 | (!test_bit(In_sync, &rdev->flags) && |
9144 | !test_bit(Journal, &rdev->flags))) && | |
d787be40 | 9145 | atomic_read(&rdev->nr_pending)==0)) { |
b4c4c7b8 | 9146 | if (mddev->pers->hot_remove_disk( |
b8321b68 | 9147 | mddev, rdev) == 0) { |
36fad858 | 9148 | sysfs_unlink_rdev(mddev, rdev); |
011abdc9 | 9149 | rdev->saved_raid_disk = rdev->raid_disk; |
b4c4c7b8 | 9150 | rdev->raid_disk = -1; |
f2a371c5 | 9151 | removed++; |
b4c4c7b8 N |
9152 | } |
9153 | } | |
d787be40 N |
9154 | if (remove_some && test_bit(RemoveSynchronized, &rdev->flags)) |
9155 | clear_bit(RemoveSynchronized, &rdev->flags); | |
9156 | } | |
9157 | ||
90584fc9 | 9158 | if (removed && mddev->kobj.sd) |
e1a86dbb | 9159 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
b4c4c7b8 | 9160 | |
2910ff17 | 9161 | if (this && removed) |
746d3207 N |
9162 | goto no_add; |
9163 | ||
dafb20fa | 9164 | rdev_for_each(rdev, mddev) { |
2910ff17 GR |
9165 | if (this && this != rdev) |
9166 | continue; | |
dbb64f86 GR |
9167 | if (test_bit(Candidate, &rdev->flags)) |
9168 | continue; | |
7bfec5f3 N |
9169 | if (rdev->raid_disk >= 0 && |
9170 | !test_bit(In_sync, &rdev->flags) && | |
f2076e7d | 9171 | !test_bit(Journal, &rdev->flags) && |
7bfec5f3 N |
9172 | !test_bit(Faulty, &rdev->flags)) |
9173 | spares++; | |
7ceb17e8 N |
9174 | if (rdev->raid_disk >= 0) |
9175 | continue; | |
9176 | if (test_bit(Faulty, &rdev->flags)) | |
9177 | continue; | |
f6b6ec5c | 9178 | if (!test_bit(Journal, &rdev->flags)) { |
f97a5528 YB |
9179 | if (!md_is_rdwr(mddev) && |
9180 | !(rdev->saved_raid_disk >= 0 && | |
9181 | !test_bit(Bitmap_sync, &rdev->flags))) | |
f6b6ec5c | 9182 | continue; |
7ceb17e8 | 9183 | |
f6b6ec5c SL |
9184 | rdev->recovery_offset = 0; |
9185 | } | |
3f79cc22 | 9186 | if (mddev->pers->hot_add_disk(mddev, rdev) == 0) { |
5e3b8a8d DLM |
9187 | /* failure here is OK */ |
9188 | sysfs_link_rdev(mddev, rdev); | |
f6b6ec5c SL |
9189 | if (!test_bit(Journal, &rdev->flags)) |
9190 | spares++; | |
54679486 | 9191 | md_new_event(); |
2953079c | 9192 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
dfc70645 | 9193 | } |
b4c4c7b8 | 9194 | } |
746d3207 | 9195 | no_add: |
6dafab6b | 9196 | if (removed) |
2953079c | 9197 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
b4c4c7b8 N |
9198 | return spares; |
9199 | } | |
7ebc0be7 | 9200 | |
ac05f256 N |
9201 | static void md_start_sync(struct work_struct *ws) |
9202 | { | |
9203 | struct mddev *mddev = container_of(ws, struct mddev, del_work); | |
c186b128 | 9204 | |
ac05f256 N |
9205 | mddev->sync_thread = md_register_thread(md_do_sync, |
9206 | mddev, | |
9207 | "resync"); | |
9208 | if (!mddev->sync_thread) { | |
9d48739e N |
9209 | pr_warn("%s: could not start resync thread...\n", |
9210 | mdname(mddev)); | |
ac05f256 N |
9211 | /* leave the spares where they are, it shouldn't hurt */ |
9212 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
9213 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9214 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9215 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
9216 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 9217 | wake_up(&resync_wait); |
ac05f256 N |
9218 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
9219 | &mddev->recovery)) | |
9220 | if (mddev->sysfs_action) | |
9221 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9222 | } else | |
9223 | md_wakeup_thread(mddev->sync_thread); | |
9224 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
54679486 | 9225 | md_new_event(); |
ac05f256 N |
9226 | } |
9227 | ||
1da177e4 LT |
9228 | /* |
9229 | * This routine is regularly called by all per-raid-array threads to | |
9230 | * deal with generic issues like resync and super-block update. | |
9231 | * Raid personalities that don't have a thread (linear/raid0) do not | |
9232 | * need this as they never do any recovery or update the superblock. | |
9233 | * | |
9234 | * It does not do any resync itself, but rather "forks" off other threads | |
9235 | * to do that as needed. | |
9236 | * When it is determined that resync is needed, we set MD_RECOVERY_RUNNING in | |
9237 | * "->recovery" and create a thread at ->sync_thread. | |
dfc70645 | 9238 | * When the thread finishes it sets MD_RECOVERY_DONE |
1da177e4 LT |
9239 | * and wakeups up this thread which will reap the thread and finish up. |
9240 | * This thread also removes any faulty devices (with nr_pending == 0). | |
9241 | * | |
9242 | * The overall approach is: | |
9243 | * 1/ if the superblock needs updating, update it. | |
9244 | * 2/ If a recovery thread is running, don't do anything else. | |
9245 | * 3/ If recovery has finished, clean up, possibly marking spares active. | |
9246 | * 4/ If there are any faulty devices, remove them. | |
9247 | * 5/ If array is degraded, try to add spares devices | |
9248 | * 6/ If array has spares or is not in-sync, start a resync thread. | |
9249 | */ | |
fd01b88c | 9250 | void md_check_recovery(struct mddev *mddev) |
1da177e4 | 9251 | { |
059421e0 N |
9252 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags) && mddev->sb_flags) { |
9253 | /* Write superblock - thread that called mddev_suspend() | |
9254 | * holds reconfig_mutex for us. | |
9255 | */ | |
9256 | set_bit(MD_UPDATING_SB, &mddev->flags); | |
9257 | smp_mb__after_atomic(); | |
9258 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags)) | |
9259 | md_update_sb(mddev, 0); | |
9260 | clear_bit_unlock(MD_UPDATING_SB, &mddev->flags); | |
9261 | wake_up(&mddev->sb_wait); | |
9262 | } | |
9263 | ||
d1932913 | 9264 | if (is_md_suspended(mddev)) |
68866e42 JB |
9265 | return; |
9266 | ||
5f40402d | 9267 | if (mddev->bitmap) |
e64e4018 | 9268 | md_bitmap_daemon_work(mddev); |
1da177e4 | 9269 | |
fca4d848 | 9270 | if (signal_pending(current)) { |
31a59e34 | 9271 | if (mddev->pers->sync_request && !mddev->external) { |
9d48739e N |
9272 | pr_debug("md: %s in immediate safe mode\n", |
9273 | mdname(mddev)); | |
fca4d848 N |
9274 | mddev->safemode = 2; |
9275 | } | |
9276 | flush_signals(current); | |
9277 | } | |
9278 | ||
f97a5528 YB |
9279 | if (!md_is_rdwr(mddev) && |
9280 | !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) | |
c89a8eee | 9281 | return; |
1da177e4 | 9282 | if ( ! ( |
2953079c | 9283 | (mddev->sb_flags & ~ (1<<MD_SB_CHANGE_PENDING)) || |
1da177e4 | 9284 | test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
fca4d848 | 9285 | test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
31a59e34 | 9286 | (mddev->external == 0 && mddev->safemode == 1) || |
4ad23a97 | 9287 | (mddev->safemode == 2 |
fca4d848 | 9288 | && !mddev->in_sync && mddev->recovery_cp == MaxSector) |
1da177e4 LT |
9289 | )) |
9290 | return; | |
fca4d848 | 9291 | |
df5b89b3 | 9292 | if (mddev_trylock(mddev)) { |
b4c4c7b8 | 9293 | int spares = 0; |
480523fe | 9294 | bool try_set_sync = mddev->safemode != 0; |
fca4d848 | 9295 | |
afc1f55c | 9296 | if (!mddev->external && mddev->safemode == 1) |
33182d15 N |
9297 | mddev->safemode = 0; |
9298 | ||
f97a5528 | 9299 | if (!md_is_rdwr(mddev)) { |
ab16bfc7 NB |
9300 | struct md_rdev *rdev; |
9301 | if (!mddev->external && mddev->in_sync) | |
9302 | /* 'Blocked' flag not needed as failed devices | |
9303 | * will be recorded if array switched to read/write. | |
9304 | * Leaving it set will prevent the device | |
9305 | * from being removed. | |
9306 | */ | |
9307 | rdev_for_each(rdev, mddev) | |
9308 | clear_bit(Blocked, &rdev->flags); | |
7ceb17e8 N |
9309 | /* On a read-only array we can: |
9310 | * - remove failed devices | |
9311 | * - add already-in_sync devices if the array itself | |
9312 | * is in-sync. | |
9313 | * As we only add devices that are already in-sync, | |
9314 | * we can activate the spares immediately. | |
c89a8eee | 9315 | */ |
7ceb17e8 | 9316 | remove_and_add_spares(mddev, NULL); |
8313b8e5 N |
9317 | /* There is no thread, but we need to call |
9318 | * ->spare_active and clear saved_raid_disk | |
9319 | */ | |
2ac295a5 | 9320 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
9dfbdafd | 9321 | md_unregister_thread(&mddev->sync_thread); |
d0a18034 | 9322 | md_reap_sync_thread(mddev); |
a4a3d26d | 9323 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
8313b8e5 | 9324 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
2953079c | 9325 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
c89a8eee N |
9326 | goto unlock; |
9327 | } | |
9328 | ||
659b254f | 9329 | if (mddev_is_clustered(mddev)) { |
f7c7a2f9 | 9330 | struct md_rdev *rdev, *tmp; |
659b254f GJ |
9331 | /* kick the device if another node issued a |
9332 | * remove disk. | |
9333 | */ | |
f7c7a2f9 | 9334 | rdev_for_each_safe(rdev, tmp, mddev) { |
659b254f GJ |
9335 | if (test_and_clear_bit(ClusterRemove, &rdev->flags) && |
9336 | rdev->raid_disk < 0) | |
9337 | md_kick_rdev_from_array(rdev); | |
9338 | } | |
9339 | } | |
9340 | ||
480523fe | 9341 | if (try_set_sync && !mddev->external && !mddev->in_sync) { |
85572d7c | 9342 | spin_lock(&mddev->lock); |
6497709b | 9343 | set_in_sync(mddev); |
85572d7c | 9344 | spin_unlock(&mddev->lock); |
fca4d848 | 9345 | } |
fca4d848 | 9346 | |
2953079c | 9347 | if (mddev->sb_flags) |
850b2b42 | 9348 | md_update_sb(mddev, 0); |
06d91a5f | 9349 | |
1da177e4 LT |
9350 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
9351 | !test_bit(MD_RECOVERY_DONE, &mddev->recovery)) { | |
9352 | /* resync/recovery still happening */ | |
9353 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9354 | goto unlock; | |
9355 | } | |
9356 | if (mddev->sync_thread) { | |
9dfbdafd | 9357 | md_unregister_thread(&mddev->sync_thread); |
d0a18034 | 9358 | md_reap_sync_thread(mddev); |
1da177e4 LT |
9359 | goto unlock; |
9360 | } | |
72a23c21 NB |
9361 | /* Set RUNNING before clearing NEEDED to avoid |
9362 | * any transients in the value of "sync_action". | |
9363 | */ | |
72f36d59 | 9364 | mddev->curr_resync_completed = 0; |
23da422b | 9365 | spin_lock(&mddev->lock); |
72a23c21 | 9366 | set_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
23da422b | 9367 | spin_unlock(&mddev->lock); |
24dd469d N |
9368 | /* Clear some bits that don't mean anything, but |
9369 | * might be left set | |
9370 | */ | |
24dd469d N |
9371 | clear_bit(MD_RECOVERY_INTR, &mddev->recovery); |
9372 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); | |
1da177e4 | 9373 | |
ed209584 N |
9374 | if (!test_and_clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
9375 | test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) | |
ac05f256 | 9376 | goto not_running; |
1da177e4 LT |
9377 | /* no recovery is running. |
9378 | * remove any failed drives, then | |
9379 | * add spares if possible. | |
72f36d59 | 9380 | * Spares are also removed and re-added, to allow |
1da177e4 LT |
9381 | * the personality to fail the re-add. |
9382 | */ | |
1da177e4 | 9383 | |
b4c4c7b8 | 9384 | if (mddev->reshape_position != MaxSector) { |
50ac168a N |
9385 | if (mddev->pers->check_reshape == NULL || |
9386 | mddev->pers->check_reshape(mddev) != 0) | |
b4c4c7b8 | 9387 | /* Cannot proceed */ |
ac05f256 | 9388 | goto not_running; |
b4c4c7b8 | 9389 | set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); |
72a23c21 | 9390 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
746d3207 | 9391 | } else if ((spares = remove_and_add_spares(mddev, NULL))) { |
24dd469d N |
9392 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9393 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
56ac36d7 | 9394 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
72a23c21 | 9395 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9396 | } else if (mddev->recovery_cp < MaxSector) { |
9397 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
72a23c21 | 9398 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9399 | } else if (!test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) |
9400 | /* nothing to be done ... */ | |
ac05f256 | 9401 | goto not_running; |
24dd469d | 9402 | |
1da177e4 | 9403 | if (mddev->pers->sync_request) { |
ef99bf48 | 9404 | if (spares) { |
a654b9d8 N |
9405 | /* We are adding a device or devices to an array |
9406 | * which has the bitmap stored on all devices. | |
9407 | * So make sure all bitmap pages get written | |
9408 | */ | |
e64e4018 | 9409 | md_bitmap_write_all(mddev->bitmap); |
a654b9d8 | 9410 | } |
ac05f256 N |
9411 | INIT_WORK(&mddev->del_work, md_start_sync); |
9412 | queue_work(md_misc_wq, &mddev->del_work); | |
9413 | goto unlock; | |
1da177e4 | 9414 | } |
ac05f256 | 9415 | not_running: |
72a23c21 NB |
9416 | if (!mddev->sync_thread) { |
9417 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 9418 | wake_up(&resync_wait); |
72a23c21 NB |
9419 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
9420 | &mddev->recovery)) | |
0c3573f1 | 9421 | if (mddev->sysfs_action) |
00bcb4ac | 9422 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
72a23c21 | 9423 | } |
ac05f256 N |
9424 | unlock: |
9425 | wake_up(&mddev->sb_wait); | |
1da177e4 LT |
9426 | mddev_unlock(mddev); |
9427 | } | |
9428 | } | |
6c144d31 | 9429 | EXPORT_SYMBOL(md_check_recovery); |
1da177e4 | 9430 | |
d0a18034 | 9431 | void md_reap_sync_thread(struct mddev *mddev) |
a91d5ac0 JB |
9432 | { |
9433 | struct md_rdev *rdev; | |
aefb2e5f GJ |
9434 | sector_t old_dev_sectors = mddev->dev_sectors; |
9435 | bool is_reshaped = false; | |
a91d5ac0 | 9436 | |
9dfbdafd | 9437 | /* sync_thread should be unregistered, collect result */ |
a91d5ac0 | 9438 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
0d8ed0e9 GJ |
9439 | !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery) && |
9440 | mddev->degraded != mddev->raid_disks) { | |
a91d5ac0 JB |
9441 | /* success...*/ |
9442 | /* activate any spares */ | |
9443 | if (mddev->pers->spare_active(mddev)) { | |
e1a86dbb | 9444 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
2953079c | 9445 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a91d5ac0 JB |
9446 | } |
9447 | } | |
9448 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
aefb2e5f | 9449 | mddev->pers->finish_reshape) { |
a91d5ac0 | 9450 | mddev->pers->finish_reshape(mddev); |
aefb2e5f GJ |
9451 | if (mddev_is_clustered(mddev)) |
9452 | is_reshaped = true; | |
9453 | } | |
a91d5ac0 JB |
9454 | |
9455 | /* If array is no-longer degraded, then any saved_raid_disk | |
f466722c | 9456 | * information must be scrapped. |
a91d5ac0 | 9457 | */ |
f466722c N |
9458 | if (!mddev->degraded) |
9459 | rdev_for_each(rdev, mddev) | |
a91d5ac0 JB |
9460 | rdev->saved_raid_disk = -1; |
9461 | ||
9462 | md_update_sb(mddev, 1); | |
2953079c | 9463 | /* MD_SB_CHANGE_PENDING should be cleared by md_update_sb, so we can |
bb8bf15b GJ |
9464 | * call resync_finish here if MD_CLUSTER_RESYNC_LOCKED is set by |
9465 | * clustered raid */ | |
9466 | if (test_and_clear_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags)) | |
9467 | md_cluster_ops->resync_finish(mddev); | |
a91d5ac0 | 9468 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
ea358cd0 | 9469 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); |
a91d5ac0 JB |
9470 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9471 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9472 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9473 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
aefb2e5f GJ |
9474 | /* |
9475 | * We call md_cluster_ops->update_size here because sync_size could | |
9476 | * be changed by md_update_sb, and MD_RECOVERY_RESHAPE is cleared, | |
9477 | * so it is time to update size across cluster. | |
9478 | */ | |
9479 | if (mddev_is_clustered(mddev) && is_reshaped | |
9480 | && !test_bit(MD_CLOSING, &mddev->flags)) | |
9481 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
f851b60d | 9482 | wake_up(&resync_wait); |
a91d5ac0 JB |
9483 | /* flag recovery needed just to double check */ |
9484 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9973f0fa | 9485 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
a91d5ac0 | 9486 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
54679486 | 9487 | md_new_event(); |
a91d5ac0 JB |
9488 | if (mddev->event_work.func) |
9489 | queue_work(md_misc_wq, &mddev->event_work); | |
9490 | } | |
6c144d31 | 9491 | EXPORT_SYMBOL(md_reap_sync_thread); |
a91d5ac0 | 9492 | |
fd01b88c | 9493 | void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev) |
6bfe0b49 | 9494 | { |
00bcb4ac | 9495 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
6bfe0b49 | 9496 | wait_event_timeout(rdev->blocked_wait, |
de393cde N |
9497 | !test_bit(Blocked, &rdev->flags) && |
9498 | !test_bit(BlockedBadBlocks, &rdev->flags), | |
6bfe0b49 DW |
9499 | msecs_to_jiffies(5000)); |
9500 | rdev_dec_pending(rdev, mddev); | |
9501 | } | |
9502 | EXPORT_SYMBOL(md_wait_for_blocked_rdev); | |
9503 | ||
c6563a8c N |
9504 | void md_finish_reshape(struct mddev *mddev) |
9505 | { | |
9506 | /* called be personality module when reshape completes. */ | |
9507 | struct md_rdev *rdev; | |
9508 | ||
9509 | rdev_for_each(rdev, mddev) { | |
9510 | if (rdev->data_offset > rdev->new_data_offset) | |
9511 | rdev->sectors += rdev->data_offset - rdev->new_data_offset; | |
9512 | else | |
9513 | rdev->sectors -= rdev->new_data_offset - rdev->data_offset; | |
9514 | rdev->data_offset = rdev->new_data_offset; | |
9515 | } | |
9516 | } | |
9517 | EXPORT_SYMBOL(md_finish_reshape); | |
2230dfe4 | 9518 | |
fc974ee2 | 9519 | /* Bad block management */ |
2230dfe4 | 9520 | |
fc974ee2 | 9521 | /* Returns 1 on success, 0 on failure */ |
3cb03002 | 9522 | int rdev_set_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
c6563a8c | 9523 | int is_new) |
2230dfe4 | 9524 | { |
85ad1d13 | 9525 | struct mddev *mddev = rdev->mddev; |
c6563a8c N |
9526 | int rv; |
9527 | if (is_new) | |
9528 | s += rdev->new_data_offset; | |
9529 | else | |
9530 | s += rdev->data_offset; | |
fc974ee2 VV |
9531 | rv = badblocks_set(&rdev->badblocks, s, sectors, 0); |
9532 | if (rv == 0) { | |
2230dfe4 | 9533 | /* Make sure they get written out promptly */ |
35b785f7 | 9534 | if (test_bit(ExternalBbl, &rdev->flags)) |
e1a86dbb | 9535 | sysfs_notify_dirent_safe(rdev->sysfs_unack_badblocks); |
8bd2f0a0 | 9536 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
2953079c SL |
9537 | set_mask_bits(&mddev->sb_flags, 0, |
9538 | BIT(MD_SB_CHANGE_CLEAN) | BIT(MD_SB_CHANGE_PENDING)); | |
2230dfe4 | 9539 | md_wakeup_thread(rdev->mddev->thread); |
fc974ee2 VV |
9540 | return 1; |
9541 | } else | |
9542 | return 0; | |
2230dfe4 N |
9543 | } |
9544 | EXPORT_SYMBOL_GPL(rdev_set_badblocks); | |
9545 | ||
c6563a8c N |
9546 | int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
9547 | int is_new) | |
2230dfe4 | 9548 | { |
35b785f7 | 9549 | int rv; |
c6563a8c N |
9550 | if (is_new) |
9551 | s += rdev->new_data_offset; | |
9552 | else | |
9553 | s += rdev->data_offset; | |
35b785f7 TM |
9554 | rv = badblocks_clear(&rdev->badblocks, s, sectors); |
9555 | if ((rv == 0) && test_bit(ExternalBbl, &rdev->flags)) | |
e1a86dbb | 9556 | sysfs_notify_dirent_safe(rdev->sysfs_badblocks); |
35b785f7 | 9557 | return rv; |
2230dfe4 N |
9558 | } |
9559 | EXPORT_SYMBOL_GPL(rdev_clear_badblocks); | |
9560 | ||
75c96f85 AB |
9561 | static int md_notify_reboot(struct notifier_block *this, |
9562 | unsigned long code, void *x) | |
1da177e4 | 9563 | { |
f2651434 | 9564 | struct mddev *mddev, *n; |
2dba6a91 | 9565 | int need_delay = 0; |
1da177e4 | 9566 | |
f2651434 CH |
9567 | spin_lock(&all_mddevs_lock); |
9568 | list_for_each_entry_safe(mddev, n, &all_mddevs, all_mddevs) { | |
12a6caf2 CH |
9569 | if (!mddev_get(mddev)) |
9570 | continue; | |
f2651434 | 9571 | spin_unlock(&all_mddevs_lock); |
c744a65c | 9572 | if (mddev_trylock(mddev)) { |
30b8aa91 N |
9573 | if (mddev->pers) |
9574 | __md_stop_writes(mddev); | |
0f62fb22 N |
9575 | if (mddev->persistent) |
9576 | mddev->safemode = 2; | |
c744a65c | 9577 | mddev_unlock(mddev); |
2dba6a91 | 9578 | } |
c744a65c | 9579 | need_delay = 1; |
f2651434 CH |
9580 | mddev_put(mddev); |
9581 | spin_lock(&all_mddevs_lock); | |
1da177e4 | 9582 | } |
f2651434 CH |
9583 | spin_unlock(&all_mddevs_lock); |
9584 | ||
c744a65c N |
9585 | /* |
9586 | * certain more exotic SCSI devices are known to be | |
9587 | * volatile wrt too early system reboots. While the | |
9588 | * right place to handle this issue is the given | |
9589 | * driver, we do want to have a safe RAID driver ... | |
9590 | */ | |
9591 | if (need_delay) | |
7d959f6e | 9592 | msleep(1000); |
c744a65c | 9593 | |
1da177e4 LT |
9594 | return NOTIFY_DONE; |
9595 | } | |
9596 | ||
75c96f85 | 9597 | static struct notifier_block md_notifier = { |
1da177e4 LT |
9598 | .notifier_call = md_notify_reboot, |
9599 | .next = NULL, | |
9600 | .priority = INT_MAX, /* before any real devices */ | |
9601 | }; | |
9602 | ||
9603 | static void md_geninit(void) | |
9604 | { | |
36a4e1fe | 9605 | pr_debug("md: sizeof(mdp_super_t) = %d\n", (int)sizeof(mdp_super_t)); |
1da177e4 | 9606 | |
97a32539 | 9607 | proc_create("mdstat", S_IRUGO, NULL, &mdstat_proc_ops); |
1da177e4 LT |
9608 | } |
9609 | ||
75c96f85 | 9610 | static int __init md_init(void) |
1da177e4 | 9611 | { |
e804ac78 TH |
9612 | int ret = -ENOMEM; |
9613 | ||
ada609ee | 9614 | md_wq = alloc_workqueue("md", WQ_MEM_RECLAIM, 0); |
e804ac78 TH |
9615 | if (!md_wq) |
9616 | goto err_wq; | |
9617 | ||
9618 | md_misc_wq = alloc_workqueue("md_misc", 0, 0); | |
9619 | if (!md_misc_wq) | |
9620 | goto err_misc_wq; | |
9621 | ||
cc1ffe61 | 9622 | md_rdev_misc_wq = alloc_workqueue("md_rdev_misc", 0, 0); |
cf0b9b48 | 9623 | if (!md_rdev_misc_wq) |
cc1ffe61 GJ |
9624 | goto err_rdev_misc_wq; |
9625 | ||
28144f99 CH |
9626 | ret = __register_blkdev(MD_MAJOR, "md", md_probe); |
9627 | if (ret < 0) | |
e804ac78 TH |
9628 | goto err_md; |
9629 | ||
28144f99 CH |
9630 | ret = __register_blkdev(0, "mdp", md_probe); |
9631 | if (ret < 0) | |
e804ac78 TH |
9632 | goto err_mdp; |
9633 | mdp_major = ret; | |
9634 | ||
1da177e4 | 9635 | register_reboot_notifier(&md_notifier); |
9adcf9d3 | 9636 | raid_table_header = register_sysctl("dev/raid", raid_table); |
1da177e4 LT |
9637 | |
9638 | md_geninit(); | |
d710e138 | 9639 | return 0; |
1da177e4 | 9640 | |
e804ac78 TH |
9641 | err_mdp: |
9642 | unregister_blkdev(MD_MAJOR, "md"); | |
9643 | err_md: | |
cc1ffe61 GJ |
9644 | destroy_workqueue(md_rdev_misc_wq); |
9645 | err_rdev_misc_wq: | |
e804ac78 TH |
9646 | destroy_workqueue(md_misc_wq); |
9647 | err_misc_wq: | |
9648 | destroy_workqueue(md_wq); | |
9649 | err_wq: | |
9650 | return ret; | |
9651 | } | |
1da177e4 | 9652 | |
70bcecdb | 9653 | static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev) |
1d7e3e96 | 9654 | { |
70bcecdb | 9655 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
f7c7a2f9 | 9656 | struct md_rdev *rdev2, *tmp; |
70bcecdb | 9657 | int role, ret; |
1d7e3e96 | 9658 | |
818da59f GJ |
9659 | /* |
9660 | * If size is changed in another node then we need to | |
9661 | * do resize as well. | |
9662 | */ | |
9663 | if (mddev->dev_sectors != le64_to_cpu(sb->size)) { | |
9664 | ret = mddev->pers->resize(mddev, le64_to_cpu(sb->size)); | |
9665 | if (ret) | |
9666 | pr_info("md-cluster: resize failed\n"); | |
9667 | else | |
e64e4018 | 9668 | md_bitmap_update_sb(mddev->bitmap); |
818da59f GJ |
9669 | } |
9670 | ||
70bcecdb | 9671 | /* Check for change of roles in the active devices */ |
f7c7a2f9 | 9672 | rdev_for_each_safe(rdev2, tmp, mddev) { |
70bcecdb GR |
9673 | if (test_bit(Faulty, &rdev2->flags)) |
9674 | continue; | |
9675 | ||
9676 | /* Check if the roles changed */ | |
9677 | role = le16_to_cpu(sb->dev_roles[rdev2->desc_nr]); | |
dbb64f86 GR |
9678 | |
9679 | if (test_bit(Candidate, &rdev2->flags)) { | |
9151ad5d | 9680 | if (role == MD_DISK_ROLE_FAULTY) { |
913cce5a CH |
9681 | pr_info("md: Removing Candidate device %pg because add failed\n", |
9682 | rdev2->bdev); | |
dbb64f86 GR |
9683 | md_kick_rdev_from_array(rdev2); |
9684 | continue; | |
9685 | } | |
9686 | else | |
9687 | clear_bit(Candidate, &rdev2->flags); | |
9688 | } | |
9689 | ||
70bcecdb | 9690 | if (role != rdev2->raid_disk) { |
ca1e98e0 GJ |
9691 | /* |
9692 | * got activated except reshape is happening. | |
9693 | */ | |
9151ad5d | 9694 | if (rdev2->raid_disk == -1 && role != MD_DISK_ROLE_SPARE && |
ca1e98e0 GJ |
9695 | !(le32_to_cpu(sb->feature_map) & |
9696 | MD_FEATURE_RESHAPE_ACTIVE)) { | |
70bcecdb GR |
9697 | rdev2->saved_raid_disk = role; |
9698 | ret = remove_and_add_spares(mddev, rdev2); | |
913cce5a CH |
9699 | pr_info("Activated spare: %pg\n", |
9700 | rdev2->bdev); | |
a578183e GJ |
9701 | /* wakeup mddev->thread here, so array could |
9702 | * perform resync with the new activated disk */ | |
9703 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9704 | md_wakeup_thread(mddev->thread); | |
70bcecdb GR |
9705 | } |
9706 | /* device faulty | |
9707 | * We just want to do the minimum to mark the disk | |
9708 | * as faulty. The recovery is performed by the | |
9709 | * one who initiated the error. | |
9710 | */ | |
9151ad5d DS |
9711 | if (role == MD_DISK_ROLE_FAULTY || |
9712 | role == MD_DISK_ROLE_JOURNAL) { | |
70bcecdb GR |
9713 | md_error(mddev, rdev2); |
9714 | clear_bit(Blocked, &rdev2->flags); | |
9715 | } | |
9716 | } | |
1d7e3e96 | 9717 | } |
70bcecdb | 9718 | |
a8da01f7 ZH |
9719 | if (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) { |
9720 | ret = update_raid_disks(mddev, le32_to_cpu(sb->raid_disks)); | |
9721 | if (ret) | |
9722 | pr_warn("md: updating array disks failed. %d\n", ret); | |
9723 | } | |
70bcecdb | 9724 | |
7564beda GJ |
9725 | /* |
9726 | * Since mddev->delta_disks has already updated in update_raid_disks, | |
9727 | * so it is time to check reshape. | |
9728 | */ | |
9729 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9730 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9731 | /* | |
9732 | * reshape is happening in the remote node, we need to | |
9733 | * update reshape_position and call start_reshape. | |
9734 | */ | |
ed4d0a4e | 9735 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); |
7564beda GJ |
9736 | if (mddev->pers->update_reshape_pos) |
9737 | mddev->pers->update_reshape_pos(mddev); | |
9738 | if (mddev->pers->start_reshape) | |
9739 | mddev->pers->start_reshape(mddev); | |
9740 | } else if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9741 | mddev->reshape_position != MaxSector && | |
9742 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9743 | /* reshape is just done in another node. */ | |
9744 | mddev->reshape_position = MaxSector; | |
9745 | if (mddev->pers->update_reshape_pos) | |
9746 | mddev->pers->update_reshape_pos(mddev); | |
9747 | } | |
9748 | ||
70bcecdb GR |
9749 | /* Finally set the event to be up to date */ |
9750 | mddev->events = le64_to_cpu(sb->events); | |
9751 | } | |
9752 | ||
9753 | static int read_rdev(struct mddev *mddev, struct md_rdev *rdev) | |
9754 | { | |
9755 | int err; | |
9756 | struct page *swapout = rdev->sb_page; | |
9757 | struct mdp_superblock_1 *sb; | |
9758 | ||
9759 | /* Store the sb page of the rdev in the swapout temporary | |
9760 | * variable in case we err in the future | |
9761 | */ | |
9762 | rdev->sb_page = NULL; | |
7f0f0d87 N |
9763 | err = alloc_disk_sb(rdev); |
9764 | if (err == 0) { | |
9765 | ClearPageUptodate(rdev->sb_page); | |
9766 | rdev->sb_loaded = 0; | |
9767 | err = super_types[mddev->major_version]. | |
9768 | load_super(rdev, NULL, mddev->minor_version); | |
9769 | } | |
70bcecdb GR |
9770 | if (err < 0) { |
9771 | pr_warn("%s: %d Could not reload rdev(%d) err: %d. Restoring old values\n", | |
9772 | __func__, __LINE__, rdev->desc_nr, err); | |
7f0f0d87 N |
9773 | if (rdev->sb_page) |
9774 | put_page(rdev->sb_page); | |
70bcecdb GR |
9775 | rdev->sb_page = swapout; |
9776 | rdev->sb_loaded = 1; | |
9777 | return err; | |
1d7e3e96 GR |
9778 | } |
9779 | ||
70bcecdb GR |
9780 | sb = page_address(rdev->sb_page); |
9781 | /* Read the offset unconditionally, even if MD_FEATURE_RECOVERY_OFFSET | |
9782 | * is not set | |
9783 | */ | |
9784 | ||
9785 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)) | |
9786 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); | |
9787 | ||
9788 | /* The other node finished recovery, call spare_active to set | |
9789 | * device In_sync and mddev->degraded | |
9790 | */ | |
9791 | if (rdev->recovery_offset == MaxSector && | |
9792 | !test_bit(In_sync, &rdev->flags) && | |
9793 | mddev->pers->spare_active(mddev)) | |
e1a86dbb | 9794 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
70bcecdb GR |
9795 | |
9796 | put_page(swapout); | |
9797 | return 0; | |
9798 | } | |
9799 | ||
9800 | void md_reload_sb(struct mddev *mddev, int nr) | |
9801 | { | |
64c54d92 | 9802 | struct md_rdev *rdev = NULL, *iter; |
70bcecdb GR |
9803 | int err; |
9804 | ||
9805 | /* Find the rdev */ | |
64c54d92 XT |
9806 | rdev_for_each_rcu(iter, mddev) { |
9807 | if (iter->desc_nr == nr) { | |
9808 | rdev = iter; | |
70bcecdb | 9809 | break; |
64c54d92 | 9810 | } |
70bcecdb GR |
9811 | } |
9812 | ||
64c54d92 | 9813 | if (!rdev) { |
70bcecdb GR |
9814 | pr_warn("%s: %d Could not find rdev with nr %d\n", __func__, __LINE__, nr); |
9815 | return; | |
9816 | } | |
9817 | ||
9818 | err = read_rdev(mddev, rdev); | |
9819 | if (err < 0) | |
9820 | return; | |
9821 | ||
9822 | check_sb_changes(mddev, rdev); | |
9823 | ||
9824 | /* Read all rdev's to update recovery_offset */ | |
0ea9924a GJ |
9825 | rdev_for_each_rcu(rdev, mddev) { |
9826 | if (!test_bit(Faulty, &rdev->flags)) | |
9827 | read_rdev(mddev, rdev); | |
9828 | } | |
1d7e3e96 GR |
9829 | } |
9830 | EXPORT_SYMBOL(md_reload_sb); | |
9831 | ||
1da177e4 LT |
9832 | #ifndef MODULE |
9833 | ||
9834 | /* | |
9835 | * Searches all registered partitions for autorun RAID arrays | |
9836 | * at boot time. | |
9837 | */ | |
4d936ec1 | 9838 | |
5b1f5bc3 | 9839 | static DEFINE_MUTEX(detected_devices_mutex); |
4d936ec1 ME |
9840 | static LIST_HEAD(all_detected_devices); |
9841 | struct detected_devices_node { | |
9842 | struct list_head list; | |
9843 | dev_t dev; | |
9844 | }; | |
1da177e4 LT |
9845 | |
9846 | void md_autodetect_dev(dev_t dev) | |
9847 | { | |
4d936ec1 ME |
9848 | struct detected_devices_node *node_detected_dev; |
9849 | ||
9850 | node_detected_dev = kzalloc(sizeof(*node_detected_dev), GFP_KERNEL); | |
9851 | if (node_detected_dev) { | |
9852 | node_detected_dev->dev = dev; | |
5b1f5bc3 | 9853 | mutex_lock(&detected_devices_mutex); |
4d936ec1 | 9854 | list_add_tail(&node_detected_dev->list, &all_detected_devices); |
5b1f5bc3 | 9855 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9856 | } |
1da177e4 LT |
9857 | } |
9858 | ||
d82fa81c | 9859 | void md_autostart_arrays(int part) |
1da177e4 | 9860 | { |
3cb03002 | 9861 | struct md_rdev *rdev; |
4d936ec1 ME |
9862 | struct detected_devices_node *node_detected_dev; |
9863 | dev_t dev; | |
9864 | int i_scanned, i_passed; | |
1da177e4 | 9865 | |
4d936ec1 ME |
9866 | i_scanned = 0; |
9867 | i_passed = 0; | |
1da177e4 | 9868 | |
9d48739e | 9869 | pr_info("md: Autodetecting RAID arrays.\n"); |
1da177e4 | 9870 | |
5b1f5bc3 | 9871 | mutex_lock(&detected_devices_mutex); |
4d936ec1 ME |
9872 | while (!list_empty(&all_detected_devices) && i_scanned < INT_MAX) { |
9873 | i_scanned++; | |
9874 | node_detected_dev = list_entry(all_detected_devices.next, | |
9875 | struct detected_devices_node, list); | |
9876 | list_del(&node_detected_dev->list); | |
9877 | dev = node_detected_dev->dev; | |
9878 | kfree(node_detected_dev); | |
90bcf133 | 9879 | mutex_unlock(&detected_devices_mutex); |
df968c4e | 9880 | rdev = md_import_device(dev,0, 90); |
90bcf133 | 9881 | mutex_lock(&detected_devices_mutex); |
1da177e4 LT |
9882 | if (IS_ERR(rdev)) |
9883 | continue; | |
9884 | ||
403df478 | 9885 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 9886 | continue; |
403df478 | 9887 | |
d0fae18f | 9888 | set_bit(AutoDetected, &rdev->flags); |
1da177e4 | 9889 | list_add(&rdev->same_set, &pending_raid_disks); |
4d936ec1 | 9890 | i_passed++; |
1da177e4 | 9891 | } |
5b1f5bc3 | 9892 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9893 | |
9d48739e | 9894 | pr_debug("md: Scanned %d and added %d devices.\n", i_scanned, i_passed); |
1da177e4 LT |
9895 | |
9896 | autorun_devices(part); | |
9897 | } | |
9898 | ||
fdee8ae4 | 9899 | #endif /* !MODULE */ |
1da177e4 LT |
9900 | |
9901 | static __exit void md_exit(void) | |
9902 | { | |
16648bac | 9903 | struct mddev *mddev, *n; |
e2f23b60 | 9904 | int delay = 1; |
8ab5e4c1 | 9905 | |
3dbd8c2e | 9906 | unregister_blkdev(MD_MAJOR,"md"); |
1da177e4 LT |
9907 | unregister_blkdev(mdp_major, "mdp"); |
9908 | unregister_reboot_notifier(&md_notifier); | |
9909 | unregister_sysctl_table(raid_table_header); | |
e2f23b60 N |
9910 | |
9911 | /* We cannot unload the modules while some process is | |
9912 | * waiting for us in select() or poll() - wake them up | |
9913 | */ | |
9914 | md_unloading = 1; | |
9915 | while (waitqueue_active(&md_event_waiters)) { | |
9916 | /* not safe to leave yet */ | |
9917 | wake_up(&md_event_waiters); | |
9918 | msleep(delay); | |
9919 | delay += delay; | |
9920 | } | |
1da177e4 | 9921 | remove_proc_entry("mdstat", NULL); |
e2f23b60 | 9922 | |
16648bac CH |
9923 | spin_lock(&all_mddevs_lock); |
9924 | list_for_each_entry_safe(mddev, n, &all_mddevs, all_mddevs) { | |
12a6caf2 CH |
9925 | if (!mddev_get(mddev)) |
9926 | continue; | |
16648bac | 9927 | spin_unlock(&all_mddevs_lock); |
1da177e4 | 9928 | export_array(mddev); |
9356863c | 9929 | mddev->ctime = 0; |
d3374825 | 9930 | mddev->hold_active = 0; |
9356863c | 9931 | /* |
16648bac CH |
9932 | * As the mddev is now fully clear, mddev_put will schedule |
9933 | * the mddev for destruction by a workqueue, and the | |
9356863c N |
9934 | * destroy_workqueue() below will wait for that to complete. |
9935 | */ | |
16648bac CH |
9936 | mddev_put(mddev); |
9937 | spin_lock(&all_mddevs_lock); | |
1da177e4 | 9938 | } |
16648bac CH |
9939 | spin_unlock(&all_mddevs_lock); |
9940 | ||
cc1ffe61 | 9941 | destroy_workqueue(md_rdev_misc_wq); |
e804ac78 TH |
9942 | destroy_workqueue(md_misc_wq); |
9943 | destroy_workqueue(md_wq); | |
1da177e4 LT |
9944 | } |
9945 | ||
685784aa | 9946 | subsys_initcall(md_init); |
1da177e4 LT |
9947 | module_exit(md_exit) |
9948 | ||
e4dca7b7 | 9949 | static int get_ro(char *buffer, const struct kernel_param *kp) |
f91de92e | 9950 | { |
3f99980c | 9951 | return sprintf(buffer, "%d\n", start_readonly); |
f91de92e | 9952 | } |
e4dca7b7 | 9953 | static int set_ro(const char *val, const struct kernel_param *kp) |
f91de92e | 9954 | { |
4c9309c0 | 9955 | return kstrtouint(val, 10, (unsigned int *)&start_readonly); |
f91de92e N |
9956 | } |
9957 | ||
80ca3a44 N |
9958 | module_param_call(start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR); |
9959 | module_param(start_dirty_degraded, int, S_IRUGO|S_IWUSR); | |
efeb53c0 | 9960 | module_param_call(new_array, add_named_array, NULL, NULL, S_IWUSR); |
78b6350d | 9961 | module_param(create_on_open, bool, S_IRUSR|S_IWUSR); |
f91de92e | 9962 | |
1da177e4 | 9963 | MODULE_LICENSE("GPL"); |
0efb9e61 | 9964 | MODULE_DESCRIPTION("MD RAID framework"); |
aa1595e9 | 9965 | MODULE_ALIAS("md"); |
72008652 | 9966 | MODULE_ALIAS_BLOCKDEV_MAJOR(MD_MAJOR); |