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 | ||
28dec870 KO |
81 | static struct kobj_type md_ktype; |
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 | |
1e50915f RB |
96 | /* |
97 | * Default number of read corrections we'll attempt on an rdev | |
98 | * before ejecting it from the array. We divide the read error | |
99 | * count by 2 for every hour elapsed between read errors. | |
100 | */ | |
101 | #define MD_DEFAULT_MAX_CORRECTED_READ_ERRORS 20 | |
7c9d5c54 ZH |
102 | /* Default safemode delay: 200 msec */ |
103 | #define DEFAULT_SAFEMODE_DELAY ((200 * HZ)/1000 +1) | |
1da177e4 LT |
104 | /* |
105 | * Current RAID-1,4,5 parallel reconstruction 'guaranteed speed limit' | |
106 | * is 1000 KB/sec, so the extra system load does not show up that much. | |
107 | * Increase it if you want to have more _guaranteed_ speed. Note that | |
338cec32 | 108 | * the RAID driver will use the maximum available bandwidth if the IO |
1da177e4 LT |
109 | * subsystem is idle. There is also an 'absolute maximum' reconstruction |
110 | * speed limit - in case reconstruction slows down your system despite | |
111 | * idle IO detection. | |
112 | * | |
113 | * you can change it via /proc/sys/dev/raid/speed_limit_min and _max. | |
88202a0c | 114 | * or /sys/block/mdX/md/sync_speed_{min,max} |
1da177e4 LT |
115 | */ |
116 | ||
117 | static int sysctl_speed_limit_min = 1000; | |
118 | static int sysctl_speed_limit_max = 200000; | |
fd01b88c | 119 | static inline int speed_min(struct mddev *mddev) |
88202a0c N |
120 | { |
121 | return mddev->sync_speed_min ? | |
122 | mddev->sync_speed_min : sysctl_speed_limit_min; | |
123 | } | |
124 | ||
fd01b88c | 125 | static inline int speed_max(struct mddev *mddev) |
88202a0c N |
126 | { |
127 | return mddev->sync_speed_max ? | |
128 | mddev->sync_speed_max : sysctl_speed_limit_max; | |
129 | } | |
1da177e4 | 130 | |
69b00b5b GJ |
131 | static void rdev_uninit_serial(struct md_rdev *rdev) |
132 | { | |
133 | if (!test_and_clear_bit(CollisionCheck, &rdev->flags)) | |
134 | return; | |
135 | ||
025471f9 | 136 | kvfree(rdev->serial); |
69b00b5b GJ |
137 | rdev->serial = NULL; |
138 | } | |
139 | ||
140 | static void rdevs_uninit_serial(struct mddev *mddev) | |
141 | { | |
142 | struct md_rdev *rdev; | |
143 | ||
144 | rdev_for_each(rdev, mddev) | |
145 | rdev_uninit_serial(rdev); | |
146 | } | |
147 | ||
404659cf | 148 | static int rdev_init_serial(struct md_rdev *rdev) |
3e148a32 | 149 | { |
025471f9 GJ |
150 | /* serial_nums equals with BARRIER_BUCKETS_NR */ |
151 | int i, serial_nums = 1 << ((PAGE_SHIFT - ilog2(sizeof(atomic_t)))); | |
69b00b5b GJ |
152 | struct serial_in_rdev *serial = NULL; |
153 | ||
154 | if (test_bit(CollisionCheck, &rdev->flags)) | |
155 | return 0; | |
156 | ||
025471f9 GJ |
157 | serial = kvmalloc(sizeof(struct serial_in_rdev) * serial_nums, |
158 | GFP_KERNEL); | |
69b00b5b GJ |
159 | if (!serial) |
160 | return -ENOMEM; | |
161 | ||
025471f9 GJ |
162 | for (i = 0; i < serial_nums; i++) { |
163 | struct serial_in_rdev *serial_tmp = &serial[i]; | |
164 | ||
165 | spin_lock_init(&serial_tmp->serial_lock); | |
166 | serial_tmp->serial_rb = RB_ROOT_CACHED; | |
167 | init_waitqueue_head(&serial_tmp->serial_io_wait); | |
168 | } | |
169 | ||
69b00b5b | 170 | rdev->serial = serial; |
404659cf | 171 | set_bit(CollisionCheck, &rdev->flags); |
3e148a32 | 172 | |
69b00b5b | 173 | return 0; |
3e148a32 GJ |
174 | } |
175 | ||
69b00b5b | 176 | static int rdevs_init_serial(struct mddev *mddev) |
11d3a9f6 GJ |
177 | { |
178 | struct md_rdev *rdev; | |
69b00b5b | 179 | int ret = 0; |
11d3a9f6 GJ |
180 | |
181 | rdev_for_each(rdev, mddev) { | |
69b00b5b GJ |
182 | ret = rdev_init_serial(rdev); |
183 | if (ret) | |
184 | break; | |
11d3a9f6 | 185 | } |
69b00b5b GJ |
186 | |
187 | /* Free all resources if pool is not existed */ | |
188 | if (ret && !mddev->serial_info_pool) | |
189 | rdevs_uninit_serial(mddev); | |
190 | ||
191 | return ret; | |
11d3a9f6 GJ |
192 | } |
193 | ||
963c555e | 194 | /* |
de31ee94 GJ |
195 | * rdev needs to enable serial stuffs if it meets the conditions: |
196 | * 1. it is multi-queue device flaged with writemostly. | |
197 | * 2. the write-behind mode is enabled. | |
198 | */ | |
199 | static int rdev_need_serial(struct md_rdev *rdev) | |
200 | { | |
201 | return (rdev && rdev->mddev->bitmap_info.max_write_behind > 0 && | |
e556f6ba | 202 | rdev->bdev->bd_disk->queue->nr_hw_queues != 1 && |
de31ee94 GJ |
203 | test_bit(WriteMostly, &rdev->flags)); |
204 | } | |
205 | ||
206 | /* | |
207 | * Init resource for rdev(s), then create serial_info_pool if: | |
208 | * 1. rdev is the first device which return true from rdev_enable_serial. | |
209 | * 2. rdev is NULL, means we want to enable serialization for all rdevs. | |
963c555e | 210 | */ |
404659cf | 211 | void mddev_create_serial_pool(struct mddev *mddev, struct md_rdev *rdev, |
11d3a9f6 | 212 | bool is_suspend) |
963c555e | 213 | { |
69b00b5b GJ |
214 | int ret = 0; |
215 | ||
de31ee94 GJ |
216 | if (rdev && !rdev_need_serial(rdev) && |
217 | !test_bit(CollisionCheck, &rdev->flags)) | |
963c555e GJ |
218 | return; |
219 | ||
de31ee94 GJ |
220 | if (!is_suspend) |
221 | mddev_suspend(mddev); | |
222 | ||
223 | if (!rdev) | |
69b00b5b | 224 | ret = rdevs_init_serial(mddev); |
de31ee94 | 225 | else |
69b00b5b GJ |
226 | ret = rdev_init_serial(rdev); |
227 | if (ret) | |
228 | goto abort; | |
de31ee94 | 229 | |
404659cf | 230 | if (mddev->serial_info_pool == NULL) { |
3024ba2d CL |
231 | /* |
232 | * already in memalloc noio context by | |
233 | * mddev_suspend() | |
234 | */ | |
404659cf GJ |
235 | mddev->serial_info_pool = |
236 | mempool_create_kmalloc_pool(NR_SERIAL_INFOS, | |
237 | sizeof(struct serial_info)); | |
69b00b5b GJ |
238 | if (!mddev->serial_info_pool) { |
239 | rdevs_uninit_serial(mddev); | |
404659cf | 240 | pr_err("can't alloc memory pool for serialization\n"); |
69b00b5b | 241 | } |
963c555e | 242 | } |
69b00b5b GJ |
243 | |
244 | abort: | |
de31ee94 GJ |
245 | if (!is_suspend) |
246 | mddev_resume(mddev); | |
963c555e | 247 | } |
963c555e GJ |
248 | |
249 | /* | |
de31ee94 GJ |
250 | * Free resource from rdev(s), and destroy serial_info_pool under conditions: |
251 | * 1. rdev is the last device flaged with CollisionCheck. | |
252 | * 2. when bitmap is destroyed while policy is not enabled. | |
253 | * 3. for disable policy, the pool is destroyed only when no rdev needs it. | |
963c555e | 254 | */ |
69b00b5b GJ |
255 | void mddev_destroy_serial_pool(struct mddev *mddev, struct md_rdev *rdev, |
256 | bool is_suspend) | |
963c555e | 257 | { |
11d3a9f6 | 258 | if (rdev && !test_bit(CollisionCheck, &rdev->flags)) |
963c555e GJ |
259 | return; |
260 | ||
404659cf | 261 | if (mddev->serial_info_pool) { |
963c555e | 262 | struct md_rdev *temp; |
de31ee94 | 263 | int num = 0; /* used to track if other rdevs need the pool */ |
963c555e | 264 | |
11d3a9f6 GJ |
265 | if (!is_suspend) |
266 | mddev_suspend(mddev); | |
267 | rdev_for_each(temp, mddev) { | |
268 | if (!rdev) { | |
69b00b5b GJ |
269 | if (!mddev->serialize_policy || |
270 | !rdev_need_serial(temp)) | |
271 | rdev_uninit_serial(temp); | |
de31ee94 GJ |
272 | else |
273 | num++; | |
274 | } else if (temp != rdev && | |
275 | test_bit(CollisionCheck, &temp->flags)) | |
963c555e | 276 | num++; |
11d3a9f6 GJ |
277 | } |
278 | ||
279 | if (rdev) | |
69b00b5b | 280 | rdev_uninit_serial(rdev); |
de31ee94 GJ |
281 | |
282 | if (num) | |
283 | pr_info("The mempool could be used by other devices\n"); | |
284 | else { | |
404659cf GJ |
285 | mempool_destroy(mddev->serial_info_pool); |
286 | mddev->serial_info_pool = NULL; | |
963c555e | 287 | } |
11d3a9f6 GJ |
288 | if (!is_suspend) |
289 | mddev_resume(mddev); | |
963c555e GJ |
290 | } |
291 | } | |
292 | ||
1da177e4 LT |
293 | static struct ctl_table_header *raid_table_header; |
294 | ||
82592c38 | 295 | static struct ctl_table raid_table[] = { |
1da177e4 | 296 | { |
1da177e4 LT |
297 | .procname = "speed_limit_min", |
298 | .data = &sysctl_speed_limit_min, | |
299 | .maxlen = sizeof(int), | |
80ca3a44 | 300 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 301 | .proc_handler = proc_dointvec, |
1da177e4 LT |
302 | }, |
303 | { | |
1da177e4 LT |
304 | .procname = "speed_limit_max", |
305 | .data = &sysctl_speed_limit_max, | |
306 | .maxlen = sizeof(int), | |
80ca3a44 | 307 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 308 | .proc_handler = proc_dointvec, |
1da177e4 | 309 | }, |
894d2491 | 310 | { } |
1da177e4 LT |
311 | }; |
312 | ||
82592c38 | 313 | static struct ctl_table raid_dir_table[] = { |
1da177e4 | 314 | { |
1da177e4 LT |
315 | .procname = "raid", |
316 | .maxlen = 0, | |
80ca3a44 | 317 | .mode = S_IRUGO|S_IXUGO, |
1da177e4 LT |
318 | .child = raid_table, |
319 | }, | |
894d2491 | 320 | { } |
1da177e4 LT |
321 | }; |
322 | ||
82592c38 | 323 | static struct ctl_table raid_root_table[] = { |
1da177e4 | 324 | { |
1da177e4 LT |
325 | .procname = "dev", |
326 | .maxlen = 0, | |
327 | .mode = 0555, | |
328 | .child = raid_dir_table, | |
329 | }, | |
894d2491 | 330 | { } |
1da177e4 LT |
331 | }; |
332 | ||
f91de92e N |
333 | static int start_readonly; |
334 | ||
78b6350d N |
335 | /* |
336 | * The original mechanism for creating an md device is to create | |
337 | * a device node in /dev and to open it. This causes races with device-close. | |
338 | * The preferred method is to write to the "new_array" module parameter. | |
339 | * This can avoid races. | |
340 | * Setting create_on_open to false disables the original mechanism | |
341 | * so all the races disappear. | |
342 | */ | |
343 | static bool create_on_open = true; | |
344 | ||
d7603b7e N |
345 | /* |
346 | * We have a system wide 'event count' that is incremented | |
347 | * on any 'interesting' event, and readers of /proc/mdstat | |
348 | * can use 'poll' or 'select' to find out when the event | |
349 | * count increases. | |
350 | * | |
351 | * Events are: | |
352 | * start array, stop array, error, add device, remove device, | |
353 | * start build, activate spare | |
354 | */ | |
2989ddbd | 355 | static DECLARE_WAIT_QUEUE_HEAD(md_event_waiters); |
d7603b7e | 356 | static atomic_t md_event_count; |
54679486 | 357 | void md_new_event(void) |
d7603b7e N |
358 | { |
359 | atomic_inc(&md_event_count); | |
360 | wake_up(&md_event_waiters); | |
361 | } | |
29269553 | 362 | EXPORT_SYMBOL_GPL(md_new_event); |
d7603b7e | 363 | |
1da177e4 LT |
364 | /* |
365 | * Enables to iterate over all existing md arrays | |
366 | * all_mddevs_lock protects this list. | |
367 | */ | |
368 | static LIST_HEAD(all_mddevs); | |
369 | static DEFINE_SPINLOCK(all_mddevs_lock); | |
370 | ||
409c57f3 N |
371 | /* Rather than calling directly into the personality make_request function, |
372 | * IO requests come here first so that we can check if the device is | |
373 | * being suspended pending a reconfiguration. | |
374 | * We hold a refcount over the call to ->make_request. By the time that | |
375 | * call has finished, the bio has been linked into some internal structure | |
376 | * and so is visible to ->quiesce(), so we don't need the refcount any more. | |
377 | */ | |
b3143b9a N |
378 | static bool is_suspended(struct mddev *mddev, struct bio *bio) |
379 | { | |
380 | if (mddev->suspended) | |
381 | return true; | |
382 | if (bio_data_dir(bio) != WRITE) | |
383 | return false; | |
384 | if (mddev->suspend_lo >= mddev->suspend_hi) | |
385 | return false; | |
386 | if (bio->bi_iter.bi_sector >= mddev->suspend_hi) | |
387 | return false; | |
388 | if (bio_end_sector(bio) < mddev->suspend_lo) | |
389 | return false; | |
390 | return true; | |
391 | } | |
392 | ||
393debc2 SL |
393 | void md_handle_request(struct mddev *mddev, struct bio *bio) |
394 | { | |
395 | check_suspended: | |
396 | rcu_read_lock(); | |
b3143b9a | 397 | if (is_suspended(mddev, bio)) { |
393debc2 | 398 | DEFINE_WAIT(__wait); |
f51d46d0 VV |
399 | /* Bail out if REQ_NOWAIT is set for the bio */ |
400 | if (bio->bi_opf & REQ_NOWAIT) { | |
401 | rcu_read_unlock(); | |
402 | bio_wouldblock_error(bio); | |
403 | return; | |
404 | } | |
393debc2 SL |
405 | for (;;) { |
406 | prepare_to_wait(&mddev->sb_wait, &__wait, | |
407 | TASK_UNINTERRUPTIBLE); | |
b3143b9a | 408 | if (!is_suspended(mddev, bio)) |
393debc2 SL |
409 | break; |
410 | rcu_read_unlock(); | |
411 | schedule(); | |
412 | rcu_read_lock(); | |
413 | } | |
414 | finish_wait(&mddev->sb_wait, &__wait); | |
415 | } | |
416 | atomic_inc(&mddev->active_io); | |
417 | rcu_read_unlock(); | |
418 | ||
419 | if (!mddev->pers->make_request(mddev, bio)) { | |
420 | atomic_dec(&mddev->active_io); | |
421 | wake_up(&mddev->sb_wait); | |
422 | goto check_suspended; | |
423 | } | |
424 | ||
425 | if (atomic_dec_and_test(&mddev->active_io) && mddev->suspended) | |
426 | wake_up(&mddev->sb_wait); | |
427 | } | |
428 | EXPORT_SYMBOL(md_handle_request); | |
429 | ||
3e08773c | 430 | static void md_submit_bio(struct bio *bio) |
1da177e4 | 431 | { |
49077326 | 432 | const int rw = bio_data_dir(bio); |
309dca30 | 433 | struct mddev *mddev = bio->bi_bdev->bd_disk->private_data; |
49077326 | 434 | |
9a5a8597 | 435 | if (mddev == NULL || mddev->pers == NULL) { |
62f7b198 | 436 | bio_io_error(bio); |
3e08773c | 437 | return; |
62f7b198 GP |
438 | } |
439 | ||
9a5a8597 | 440 | if (unlikely(test_bit(MD_BROKEN, &mddev->flags)) && (rw == WRITE)) { |
409c57f3 | 441 | bio_io_error(bio); |
3e08773c | 442 | return; |
409c57f3 | 443 | } |
9a5a8597 | 444 | |
5a97806f | 445 | bio = bio_split_to_limits(bio); |
9a5a8597 | 446 | |
bbfa57c0 | 447 | if (mddev->ro == 1 && unlikely(rw == WRITE)) { |
4246a0b6 | 448 | if (bio_sectors(bio) != 0) |
4e4cbee9 | 449 | bio->bi_status = BLK_STS_IOERR; |
4246a0b6 | 450 | bio_endio(bio); |
3e08773c | 451 | return; |
bbfa57c0 | 452 | } |
49077326 | 453 | |
9c573de3 | 454 | /* bio could be mergeable after passing to underlayer */ |
1eff9d32 | 455 | bio->bi_opf &= ~REQ_NOMERGE; |
393debc2 SL |
456 | |
457 | md_handle_request(mddev, bio); | |
409c57f3 N |
458 | } |
459 | ||
9e35b99c N |
460 | /* mddev_suspend makes sure no new requests are submitted |
461 | * to the device, and that any requests that have been submitted | |
462 | * are completely handled. | |
afa0f557 N |
463 | * Once mddev_detach() is called and completes, the module will be |
464 | * completely unused. | |
9e35b99c | 465 | */ |
fd01b88c | 466 | void mddev_suspend(struct mddev *mddev) |
409c57f3 | 467 | { |
092398dc | 468 | WARN_ON_ONCE(mddev->thread && current == mddev->thread->tsk); |
4d5324f7 | 469 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
470 | if (mddev->suspended++) |
471 | return; | |
409c57f3 | 472 | synchronize_rcu(); |
cc27b0c7 | 473 | wake_up(&mddev->sb_wait); |
35bfc521 N |
474 | set_bit(MD_ALLOW_SB_UPDATE, &mddev->flags); |
475 | smp_mb__after_atomic(); | |
409c57f3 N |
476 | wait_event(mddev->sb_wait, atomic_read(&mddev->active_io) == 0); |
477 | mddev->pers->quiesce(mddev, 1); | |
35bfc521 N |
478 | clear_bit_unlock(MD_ALLOW_SB_UPDATE, &mddev->flags); |
479 | wait_event(mddev->sb_wait, !test_bit(MD_UPDATING_SB, &mddev->flags)); | |
0d9f4f13 JB |
480 | |
481 | del_timer_sync(&mddev->safemode_timer); | |
78f57ef9 CL |
482 | /* restrict memory reclaim I/O during raid array is suspend */ |
483 | mddev->noio_flag = memalloc_noio_save(); | |
409c57f3 | 484 | } |
390ee602 | 485 | EXPORT_SYMBOL_GPL(mddev_suspend); |
409c57f3 | 486 | |
fd01b88c | 487 | void mddev_resume(struct mddev *mddev) |
409c57f3 | 488 | { |
78f57ef9 CL |
489 | /* entred the memalloc scope from mddev_suspend() */ |
490 | memalloc_noio_restore(mddev->noio_flag); | |
4d5324f7 | 491 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
492 | if (--mddev->suspended) |
493 | return; | |
409c57f3 N |
494 | wake_up(&mddev->sb_wait); |
495 | mddev->pers->quiesce(mddev, 0); | |
0fd018af | 496 | |
47525e59 | 497 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
0fd018af JB |
498 | md_wakeup_thread(mddev->thread); |
499 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
1da177e4 | 500 | } |
390ee602 | 501 | EXPORT_SYMBOL_GPL(mddev_resume); |
1da177e4 | 502 | |
a2826aa9 | 503 | /* |
e9c7469b | 504 | * Generic flush handling for md |
a2826aa9 N |
505 | */ |
506 | ||
4bc034d3 | 507 | static void md_end_flush(struct bio *bio) |
a2826aa9 | 508 | { |
4bc034d3 N |
509 | struct md_rdev *rdev = bio->bi_private; |
510 | struct mddev *mddev = rdev->mddev; | |
a2826aa9 N |
511 | |
512 | rdev_dec_pending(rdev, mddev); | |
513 | ||
4bc034d3 N |
514 | if (atomic_dec_and_test(&mddev->flush_pending)) { |
515 | /* The pre-request flush has finished */ | |
516 | queue_work(md_wq, &mddev->flush_work); | |
a2826aa9 | 517 | } |
4bc034d3 | 518 | bio_put(bio); |
5a409b4f | 519 | } |
a7a07e69 | 520 | |
4bc034d3 N |
521 | static void md_submit_flush_data(struct work_struct *ws); |
522 | ||
523 | static void submit_flushes(struct work_struct *ws) | |
a2826aa9 | 524 | { |
4bc034d3 | 525 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); |
3cb03002 | 526 | struct md_rdev *rdev; |
a2826aa9 | 527 | |
2bc13b83 | 528 | mddev->start_flush = ktime_get_boottime(); |
4bc034d3 N |
529 | INIT_WORK(&mddev->flush_work, md_submit_flush_data); |
530 | atomic_set(&mddev->flush_pending, 1); | |
a2826aa9 | 531 | rcu_read_lock(); |
dafb20fa | 532 | rdev_for_each_rcu(rdev, mddev) |
a2826aa9 N |
533 | if (rdev->raid_disk >= 0 && |
534 | !test_bit(Faulty, &rdev->flags)) { | |
535 | /* Take two references, one is dropped | |
536 | * when request finishes, one after | |
537 | * we reclaim rcu_read_lock | |
538 | */ | |
539 | struct bio *bi; | |
540 | atomic_inc(&rdev->nr_pending); | |
541 | atomic_inc(&rdev->nr_pending); | |
542 | rcu_read_unlock(); | |
609be106 CH |
543 | bi = bio_alloc_bioset(rdev->bdev, 0, |
544 | REQ_OP_WRITE | REQ_PREFLUSH, | |
545 | GFP_NOIO, &mddev->bio_set); | |
5a409b4f | 546 | bi->bi_end_io = md_end_flush; |
4bc034d3 | 547 | bi->bi_private = rdev; |
4bc034d3 | 548 | atomic_inc(&mddev->flush_pending); |
4e49ea4a | 549 | submit_bio(bi); |
a2826aa9 N |
550 | rcu_read_lock(); |
551 | rdev_dec_pending(rdev, mddev); | |
552 | } | |
553 | rcu_read_unlock(); | |
4bc034d3 N |
554 | if (atomic_dec_and_test(&mddev->flush_pending)) |
555 | queue_work(md_wq, &mddev->flush_work); | |
556 | } | |
a2826aa9 | 557 | |
4bc034d3 N |
558 | static void md_submit_flush_data(struct work_struct *ws) |
559 | { | |
560 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); | |
561 | struct bio *bio = mddev->flush_bio; | |
562 | ||
563 | /* | |
564 | * must reset flush_bio before calling into md_handle_request to avoid a | |
565 | * deadlock, because other bios passed md_handle_request suspend check | |
566 | * could wait for this and below md_handle_request could wait for those | |
567 | * bios because of suspend check | |
568 | */ | |
dc5d17a3 | 569 | spin_lock_irq(&mddev->lock); |
81ba3c24 | 570 | mddev->prev_flush_start = mddev->start_flush; |
4bc034d3 | 571 | mddev->flush_bio = NULL; |
dc5d17a3 | 572 | spin_unlock_irq(&mddev->lock); |
4bc034d3 N |
573 | wake_up(&mddev->sb_wait); |
574 | ||
575 | if (bio->bi_iter.bi_size == 0) { | |
576 | /* an empty barrier - all done */ | |
577 | bio_endio(bio); | |
578 | } else { | |
579 | bio->bi_opf &= ~REQ_PREFLUSH; | |
580 | md_handle_request(mddev, bio); | |
a2826aa9 | 581 | } |
a2826aa9 | 582 | } |
4bc034d3 | 583 | |
775d7831 DJ |
584 | /* |
585 | * Manages consolidation of flushes and submitting any flushes needed for | |
586 | * a bio with REQ_PREFLUSH. Returns true if the bio is finished or is | |
587 | * being finished in another context. Returns false if the flushing is | |
588 | * complete but still needs the I/O portion of the bio to be processed. | |
589 | */ | |
590 | bool md_flush_request(struct mddev *mddev, struct bio *bio) | |
4bc034d3 | 591 | { |
81ba3c24 | 592 | ktime_t req_start = ktime_get_boottime(); |
4bc034d3 | 593 | spin_lock_irq(&mddev->lock); |
204d1a64 PG |
594 | /* flush requests wait until ongoing flush completes, |
595 | * hence coalescing all the pending requests. | |
596 | */ | |
4bc034d3 | 597 | wait_event_lock_irq(mddev->sb_wait, |
2bc13b83 | 598 | !mddev->flush_bio || |
a23f2aae | 599 | ktime_before(req_start, mddev->prev_flush_start), |
4bc034d3 | 600 | mddev->lock); |
204d1a64 | 601 | /* new request after previous flush is completed */ |
a23f2aae | 602 | if (ktime_after(req_start, mddev->prev_flush_start)) { |
2bc13b83 N |
603 | WARN_ON(mddev->flush_bio); |
604 | mddev->flush_bio = bio; | |
605 | bio = NULL; | |
606 | } | |
4bc034d3 N |
607 | spin_unlock_irq(&mddev->lock); |
608 | ||
2bc13b83 N |
609 | if (!bio) { |
610 | INIT_WORK(&mddev->flush_work, submit_flushes); | |
611 | queue_work(md_wq, &mddev->flush_work); | |
612 | } else { | |
613 | /* flush was performed for some other bio while we waited. */ | |
614 | if (bio->bi_iter.bi_size == 0) | |
615 | /* an empty barrier - all done */ | |
616 | bio_endio(bio); | |
617 | else { | |
618 | bio->bi_opf &= ~REQ_PREFLUSH; | |
775d7831 | 619 | return false; |
2bc13b83 N |
620 | } |
621 | } | |
775d7831 | 622 | return true; |
4bc034d3 | 623 | } |
e9c7469b | 624 | EXPORT_SYMBOL(md_flush_request); |
409c57f3 | 625 | |
fd01b88c | 626 | static inline struct mddev *mddev_get(struct mddev *mddev) |
1da177e4 | 627 | { |
12a6caf2 CH |
628 | lockdep_assert_held(&all_mddevs_lock); |
629 | ||
630 | if (test_bit(MD_DELETED, &mddev->flags)) | |
631 | return NULL; | |
1da177e4 LT |
632 | atomic_inc(&mddev->active); |
633 | return mddev; | |
634 | } | |
635 | ||
5fd3a17e | 636 | static void mddev_delayed_delete(struct work_struct *ws); |
d3374825 | 637 | |
34cb92c0 | 638 | void mddev_put(struct mddev *mddev) |
1da177e4 LT |
639 | { |
640 | if (!atomic_dec_and_lock(&mddev->active, &all_mddevs_lock)) | |
641 | return; | |
d3374825 | 642 | if (!mddev->raid_disks && list_empty(&mddev->disks) && |
cbd19983 N |
643 | mddev->ctime == 0 && !mddev->hold_active) { |
644 | /* Array is not configured at all, and not held active, | |
645 | * so destroy it */ | |
12a6caf2 | 646 | set_bit(MD_DELETED, &mddev->flags); |
28dec870 KO |
647 | |
648 | /* | |
649 | * Call queue_work inside the spinlock so that | |
650 | * flush_workqueue() after mddev_find will succeed in waiting | |
651 | * for the work to be done. | |
652 | */ | |
653 | INIT_WORK(&mddev->del_work, mddev_delayed_delete); | |
654 | queue_work(md_misc_wq, &mddev->del_work); | |
d3374825 N |
655 | } |
656 | spin_unlock(&all_mddevs_lock); | |
1da177e4 LT |
657 | } |
658 | ||
8376d3c1 | 659 | static void md_safemode_timeout(struct timer_list *t); |
25b2edfa | 660 | |
fd01b88c | 661 | void mddev_init(struct mddev *mddev) |
fafd7fb0 N |
662 | { |
663 | mutex_init(&mddev->open_mutex); | |
664 | mutex_init(&mddev->reconfig_mutex); | |
665 | mutex_init(&mddev->bitmap_info.mutex); | |
666 | INIT_LIST_HEAD(&mddev->disks); | |
667 | INIT_LIST_HEAD(&mddev->all_mddevs); | |
8376d3c1 | 668 | timer_setup(&mddev->safemode_timer, md_safemode_timeout, 0); |
fafd7fb0 N |
669 | atomic_set(&mddev->active, 1); |
670 | atomic_set(&mddev->openers, 0); | |
671 | atomic_set(&mddev->active_io, 0); | |
85572d7c | 672 | spin_lock_init(&mddev->lock); |
4bc034d3 | 673 | atomic_set(&mddev->flush_pending, 0); |
fafd7fb0 N |
674 | init_waitqueue_head(&mddev->sb_wait); |
675 | init_waitqueue_head(&mddev->recovery_wait); | |
676 | mddev->reshape_position = MaxSector; | |
2c810cdd | 677 | mddev->reshape_backwards = 0; |
c4a39551 | 678 | mddev->last_sync_action = "none"; |
fafd7fb0 N |
679 | mddev->resync_min = 0; |
680 | mddev->resync_max = MaxSector; | |
681 | mddev->level = LEVEL_NONE; | |
682 | } | |
390ee602 | 683 | EXPORT_SYMBOL_GPL(mddev_init); |
fafd7fb0 | 684 | |
8b57251f CH |
685 | static struct mddev *mddev_find_locked(dev_t unit) |
686 | { | |
687 | struct mddev *mddev; | |
688 | ||
689 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
690 | if (mddev->unit == unit) | |
691 | return mddev; | |
692 | ||
693 | return NULL; | |
694 | } | |
695 | ||
85c8c3c1 CH |
696 | /* find an unused unit number */ |
697 | static dev_t mddev_alloc_unit(void) | |
698 | { | |
699 | static int next_minor = 512; | |
700 | int start = next_minor; | |
701 | bool is_free = 0; | |
702 | dev_t dev = 0; | |
703 | ||
704 | while (!is_free) { | |
705 | dev = MKDEV(MD_MAJOR, next_minor); | |
706 | next_minor++; | |
707 | if (next_minor > MINORMASK) | |
708 | next_minor = 0; | |
709 | if (next_minor == start) | |
710 | return 0; /* Oh dear, all in use. */ | |
711 | is_free = !mddev_find_locked(dev); | |
712 | } | |
713 | ||
714 | return dev; | |
715 | } | |
716 | ||
0d809b38 | 717 | static struct mddev *mddev_alloc(dev_t unit) |
1da177e4 | 718 | { |
0d809b38 CH |
719 | struct mddev *new; |
720 | int error; | |
1da177e4 | 721 | |
8f5f02c4 | 722 | if (unit && MAJOR(unit) != MD_MAJOR) |
d144fe6f | 723 | unit &= ~((1 << MdpMinorShift) - 1); |
8f5f02c4 | 724 | |
d144fe6f CH |
725 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
726 | if (!new) | |
0d809b38 | 727 | return ERR_PTR(-ENOMEM); |
d144fe6f | 728 | mddev_init(new); |
efeb53c0 | 729 | |
d144fe6f | 730 | spin_lock(&all_mddevs_lock); |
efeb53c0 | 731 | if (unit) { |
0d809b38 CH |
732 | error = -EEXIST; |
733 | if (mddev_find_locked(unit)) | |
d144fe6f | 734 | goto out_free_new; |
d144fe6f CH |
735 | new->unit = unit; |
736 | if (MAJOR(unit) == MD_MAJOR) | |
737 | new->md_minor = MINOR(unit); | |
738 | else | |
739 | new->md_minor = MINOR(unit) >> MdpMinorShift; | |
740 | new->hold_active = UNTIL_IOCTL; | |
741 | } else { | |
0d809b38 | 742 | error = -ENODEV; |
85c8c3c1 | 743 | new->unit = mddev_alloc_unit(); |
d144fe6f CH |
744 | if (!new->unit) |
745 | goto out_free_new; | |
85c8c3c1 | 746 | new->md_minor = MINOR(new->unit); |
efeb53c0 | 747 | new->hold_active = UNTIL_STOP; |
1da177e4 | 748 | } |
1da177e4 | 749 | |
d144fe6f CH |
750 | list_add(&new->all_mddevs, &all_mddevs); |
751 | spin_unlock(&all_mddevs_lock); | |
752 | return new; | |
753 | out_free_new: | |
754 | spin_unlock(&all_mddevs_lock); | |
755 | kfree(new); | |
0d809b38 | 756 | return ERR_PTR(error); |
1da177e4 LT |
757 | } |
758 | ||
c57094a6 CH |
759 | static void mddev_free(struct mddev *mddev) |
760 | { | |
761 | spin_lock(&all_mddevs_lock); | |
762 | list_del(&mddev->all_mddevs); | |
763 | spin_unlock(&all_mddevs_lock); | |
764 | ||
765 | kfree(mddev); | |
766 | } | |
767 | ||
c32dc040 | 768 | static const struct attribute_group md_redundancy_group; |
b6eb127d | 769 | |
5c47daf6 | 770 | void mddev_unlock(struct mddev *mddev) |
1da177e4 | 771 | { |
a64c876f | 772 | if (mddev->to_remove) { |
b6eb127d N |
773 | /* These cannot be removed under reconfig_mutex as |
774 | * an access to the files will try to take reconfig_mutex | |
775 | * while holding the file unremovable, which leads to | |
776 | * a deadlock. | |
bb4f1e9d N |
777 | * So hold set sysfs_active while the remove in happeing, |
778 | * and anything else which might set ->to_remove or my | |
779 | * otherwise change the sysfs namespace will fail with | |
780 | * -EBUSY if sysfs_active is still set. | |
781 | * We set sysfs_active under reconfig_mutex and elsewhere | |
782 | * test it under the same mutex to ensure its correct value | |
783 | * is seen. | |
b6eb127d | 784 | */ |
c32dc040 | 785 | const struct attribute_group *to_remove = mddev->to_remove; |
a64c876f | 786 | mddev->to_remove = NULL; |
bb4f1e9d | 787 | mddev->sysfs_active = 1; |
b6eb127d N |
788 | mutex_unlock(&mddev->reconfig_mutex); |
789 | ||
00bcb4ac N |
790 | if (mddev->kobj.sd) { |
791 | if (to_remove != &md_redundancy_group) | |
792 | sysfs_remove_group(&mddev->kobj, to_remove); | |
793 | if (mddev->pers == NULL || | |
794 | mddev->pers->sync_request == NULL) { | |
795 | sysfs_remove_group(&mddev->kobj, &md_redundancy_group); | |
796 | if (mddev->sysfs_action) | |
797 | sysfs_put(mddev->sysfs_action); | |
e8efa9b8 JB |
798 | if (mddev->sysfs_completed) |
799 | sysfs_put(mddev->sysfs_completed); | |
800 | if (mddev->sysfs_degraded) | |
801 | sysfs_put(mddev->sysfs_degraded); | |
00bcb4ac | 802 | mddev->sysfs_action = NULL; |
e8efa9b8 JB |
803 | mddev->sysfs_completed = NULL; |
804 | mddev->sysfs_degraded = NULL; | |
00bcb4ac | 805 | } |
a64c876f | 806 | } |
bb4f1e9d | 807 | mddev->sysfs_active = 0; |
b6eb127d N |
808 | } else |
809 | mutex_unlock(&mddev->reconfig_mutex); | |
1da177e4 | 810 | |
751e67ca CD |
811 | /* As we've dropped the mutex we need a spinlock to |
812 | * make sure the thread doesn't disappear | |
01f96c0a N |
813 | */ |
814 | spin_lock(&pers_lock); | |
005eca5e | 815 | md_wakeup_thread(mddev->thread); |
4d5324f7 | 816 | wake_up(&mddev->sb_wait); |
01f96c0a | 817 | spin_unlock(&pers_lock); |
1da177e4 | 818 | } |
5c47daf6 | 819 | EXPORT_SYMBOL_GPL(mddev_unlock); |
1da177e4 | 820 | |
57d051dc | 821 | struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr) |
1ca69c4b N |
822 | { |
823 | struct md_rdev *rdev; | |
824 | ||
825 | rdev_for_each_rcu(rdev, mddev) | |
826 | if (rdev->desc_nr == nr) | |
827 | return rdev; | |
828 | ||
829 | return NULL; | |
830 | } | |
57d051dc | 831 | EXPORT_SYMBOL_GPL(md_find_rdev_nr_rcu); |
1ca69c4b N |
832 | |
833 | static struct md_rdev *find_rdev(struct mddev *mddev, dev_t dev) | |
1da177e4 | 834 | { |
3cb03002 | 835 | struct md_rdev *rdev; |
1da177e4 | 836 | |
dafb20fa | 837 | rdev_for_each(rdev, mddev) |
1da177e4 LT |
838 | if (rdev->bdev->bd_dev == dev) |
839 | return rdev; | |
159ec1fc | 840 | |
1da177e4 LT |
841 | return NULL; |
842 | } | |
843 | ||
1532d9e8 | 844 | struct md_rdev *md_find_rdev_rcu(struct mddev *mddev, dev_t dev) |
1ca69c4b N |
845 | { |
846 | struct md_rdev *rdev; | |
847 | ||
848 | rdev_for_each_rcu(rdev, mddev) | |
849 | if (rdev->bdev->bd_dev == dev) | |
850 | return rdev; | |
851 | ||
852 | return NULL; | |
853 | } | |
1532d9e8 | 854 | EXPORT_SYMBOL_GPL(md_find_rdev_rcu); |
1ca69c4b | 855 | |
84fc4b56 | 856 | static struct md_personality *find_pers(int level, char *clevel) |
2604b703 | 857 | { |
84fc4b56 | 858 | struct md_personality *pers; |
d9d166c2 N |
859 | list_for_each_entry(pers, &pers_list, list) { |
860 | if (level != LEVEL_NONE && pers->level == level) | |
2604b703 | 861 | return pers; |
d9d166c2 N |
862 | if (strcmp(pers->name, clevel)==0) |
863 | return pers; | |
864 | } | |
2604b703 N |
865 | return NULL; |
866 | } | |
867 | ||
b73df2d3 | 868 | /* return the offset of the super block in 512byte sectors */ |
3cb03002 | 869 | static inline sector_t calc_dev_sboffset(struct md_rdev *rdev) |
1da177e4 | 870 | { |
0fe80347 | 871 | return MD_NEW_SIZE_SECTORS(bdev_nr_sectors(rdev->bdev)); |
1da177e4 LT |
872 | } |
873 | ||
f72ffdd6 | 874 | static int alloc_disk_sb(struct md_rdev *rdev) |
1da177e4 | 875 | { |
1da177e4 | 876 | rdev->sb_page = alloc_page(GFP_KERNEL); |
7f0f0d87 | 877 | if (!rdev->sb_page) |
ebc24337 | 878 | return -ENOMEM; |
1da177e4 LT |
879 | return 0; |
880 | } | |
881 | ||
545c8795 | 882 | void md_rdev_clear(struct md_rdev *rdev) |
1da177e4 LT |
883 | { |
884 | if (rdev->sb_page) { | |
2d1f3b5d | 885 | put_page(rdev->sb_page); |
1da177e4 LT |
886 | rdev->sb_loaded = 0; |
887 | rdev->sb_page = NULL; | |
0f420358 | 888 | rdev->sb_start = 0; |
dd8ac336 | 889 | rdev->sectors = 0; |
1da177e4 | 890 | } |
2699b672 N |
891 | if (rdev->bb_page) { |
892 | put_page(rdev->bb_page); | |
893 | rdev->bb_page = NULL; | |
894 | } | |
d3b407fb | 895 | badblocks_exit(&rdev->badblocks); |
1da177e4 | 896 | } |
545c8795 | 897 | EXPORT_SYMBOL_GPL(md_rdev_clear); |
1da177e4 | 898 | |
4246a0b6 | 899 | static void super_written(struct bio *bio) |
7bfa19f2 | 900 | { |
3cb03002 | 901 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 902 | struct mddev *mddev = rdev->mddev; |
7bfa19f2 | 903 | |
4e4cbee9 | 904 | if (bio->bi_status) { |
b3db8a21 GJ |
905 | pr_err("md: %s gets error=%d\n", __func__, |
906 | blk_status_to_errno(bio->bi_status)); | |
a9701a30 | 907 | md_error(mddev, rdev); |
46533ff7 N |
908 | if (!test_bit(Faulty, &rdev->flags) |
909 | && (bio->bi_opf & MD_FAILFAST)) { | |
2953079c | 910 | set_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags); |
46533ff7 N |
911 | set_bit(LastDev, &rdev->flags); |
912 | } | |
913 | } else | |
914 | clear_bit(LastDev, &rdev->flags); | |
7bfa19f2 | 915 | |
a9701a30 N |
916 | if (atomic_dec_and_test(&mddev->pending_writes)) |
917 | wake_up(&mddev->sb_wait); | |
ed3b98c7 | 918 | rdev_dec_pending(rdev, mddev); |
f8b58edf | 919 | bio_put(bio); |
7bfa19f2 N |
920 | } |
921 | ||
fd01b88c | 922 | void md_super_write(struct mddev *mddev, struct md_rdev *rdev, |
7bfa19f2 N |
923 | sector_t sector, int size, struct page *page) |
924 | { | |
925 | /* write first size bytes of page to sector of rdev | |
926 | * Increment mddev->pending_writes before returning | |
927 | * and decrement it on completion, waking up sb_wait | |
928 | * if zero is reached. | |
929 | * If an error occurred, call md_error | |
930 | */ | |
46533ff7 | 931 | struct bio *bio; |
46533ff7 | 932 | |
4b6c1060 HM |
933 | if (!page) |
934 | return; | |
935 | ||
46533ff7 N |
936 | if (test_bit(Faulty, &rdev->flags)) |
937 | return; | |
938 | ||
609be106 CH |
939 | bio = bio_alloc_bioset(rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev, |
940 | 1, | |
941 | REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH | REQ_FUA, | |
942 | GFP_NOIO, &mddev->sync_set); | |
7bfa19f2 | 943 | |
ed3b98c7 SL |
944 | atomic_inc(&rdev->nr_pending); |
945 | ||
4f024f37 | 946 | bio->bi_iter.bi_sector = sector; |
7bfa19f2 N |
947 | bio_add_page(bio, page, size, 0); |
948 | bio->bi_private = rdev; | |
949 | bio->bi_end_io = super_written; | |
46533ff7 N |
950 | |
951 | if (test_bit(MD_FAILFAST_SUPPORTED, &mddev->flags) && | |
952 | test_bit(FailFast, &rdev->flags) && | |
953 | !test_bit(LastDev, &rdev->flags)) | |
609be106 | 954 | bio->bi_opf |= MD_FAILFAST; |
a9701a30 | 955 | |
7bfa19f2 | 956 | atomic_inc(&mddev->pending_writes); |
4e49ea4a | 957 | submit_bio(bio); |
a9701a30 N |
958 | } |
959 | ||
46533ff7 | 960 | int md_super_wait(struct mddev *mddev) |
a9701a30 | 961 | { |
e9c7469b | 962 | /* wait for all superblock writes that were scheduled to complete */ |
1967cd56 | 963 | wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0); |
2953079c | 964 | if (test_and_clear_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags)) |
46533ff7 N |
965 | return -EAGAIN; |
966 | return 0; | |
7bfa19f2 N |
967 | } |
968 | ||
3cb03002 | 969 | int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, |
4ce4c73f | 970 | struct page *page, blk_opf_t opf, bool metadata_op) |
1da177e4 | 971 | { |
32637385 CH |
972 | struct bio bio; |
973 | struct bio_vec bvec; | |
974 | ||
74d46992 | 975 | if (metadata_op && rdev->meta_bdev) |
4ce4c73f | 976 | bio_init(&bio, rdev->meta_bdev, &bvec, 1, opf); |
74d46992 | 977 | else |
4ce4c73f | 978 | bio_init(&bio, rdev->bdev, &bvec, 1, opf); |
49add496 | 979 | |
ccebd4c4 | 980 | if (metadata_op) |
32637385 | 981 | bio.bi_iter.bi_sector = sector + rdev->sb_start; |
1fdd6fc9 N |
982 | else if (rdev->mddev->reshape_position != MaxSector && |
983 | (rdev->mddev->reshape_backwards == | |
984 | (sector >= rdev->mddev->reshape_position))) | |
32637385 | 985 | bio.bi_iter.bi_sector = sector + rdev->new_data_offset; |
ccebd4c4 | 986 | else |
32637385 CH |
987 | bio.bi_iter.bi_sector = sector + rdev->data_offset; |
988 | bio_add_page(&bio, page, size, 0); | |
4e49ea4a | 989 | |
32637385 | 990 | submit_bio_wait(&bio); |
1da177e4 | 991 | |
32637385 | 992 | return !bio.bi_status; |
1da177e4 | 993 | } |
a8745db2 | 994 | EXPORT_SYMBOL_GPL(sync_page_io); |
1da177e4 | 995 | |
f72ffdd6 | 996 | static int read_disk_sb(struct md_rdev *rdev, int size) |
1da177e4 | 997 | { |
1da177e4 LT |
998 | if (rdev->sb_loaded) |
999 | return 0; | |
1000 | ||
4ce4c73f | 1001 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, REQ_OP_READ, true)) |
1da177e4 LT |
1002 | goto fail; |
1003 | rdev->sb_loaded = 1; | |
1004 | return 0; | |
1005 | ||
1006 | fail: | |
913cce5a CH |
1007 | pr_err("md: disabled device %pg, could not read superblock.\n", |
1008 | rdev->bdev); | |
1da177e4 LT |
1009 | return -EINVAL; |
1010 | } | |
1011 | ||
e6fd2093 | 1012 | static int md_uuid_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 | 1013 | { |
f72ffdd6 | 1014 | return sb1->set_uuid0 == sb2->set_uuid0 && |
05710466 AN |
1015 | sb1->set_uuid1 == sb2->set_uuid1 && |
1016 | sb1->set_uuid2 == sb2->set_uuid2 && | |
1017 | sb1->set_uuid3 == sb2->set_uuid3; | |
1da177e4 LT |
1018 | } |
1019 | ||
e6fd2093 | 1020 | static int md_sb_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 LT |
1021 | { |
1022 | int ret; | |
1023 | mdp_super_t *tmp1, *tmp2; | |
1024 | ||
1025 | tmp1 = kmalloc(sizeof(*tmp1),GFP_KERNEL); | |
1026 | tmp2 = kmalloc(sizeof(*tmp2),GFP_KERNEL); | |
1027 | ||
1028 | if (!tmp1 || !tmp2) { | |
1029 | ret = 0; | |
1da177e4 LT |
1030 | goto abort; |
1031 | } | |
1032 | ||
1033 | *tmp1 = *sb1; | |
1034 | *tmp2 = *sb2; | |
1035 | ||
1036 | /* | |
1037 | * nr_disks is not constant | |
1038 | */ | |
1039 | tmp1->nr_disks = 0; | |
1040 | tmp2->nr_disks = 0; | |
1041 | ||
ce0c8e05 | 1042 | ret = (memcmp(tmp1, tmp2, MD_SB_GENERIC_CONSTANT_WORDS * 4) == 0); |
1da177e4 | 1043 | abort: |
990a8baf JJ |
1044 | kfree(tmp1); |
1045 | kfree(tmp2); | |
1da177e4 LT |
1046 | return ret; |
1047 | } | |
1048 | ||
4d167f09 N |
1049 | static u32 md_csum_fold(u32 csum) |
1050 | { | |
1051 | csum = (csum & 0xffff) + (csum >> 16); | |
1052 | return (csum & 0xffff) + (csum >> 16); | |
1053 | } | |
1054 | ||
f72ffdd6 | 1055 | static unsigned int calc_sb_csum(mdp_super_t *sb) |
1da177e4 | 1056 | { |
4d167f09 N |
1057 | u64 newcsum = 0; |
1058 | u32 *sb32 = (u32*)sb; | |
1059 | int i; | |
1da177e4 LT |
1060 | unsigned int disk_csum, csum; |
1061 | ||
1062 | disk_csum = sb->sb_csum; | |
1063 | sb->sb_csum = 0; | |
4d167f09 N |
1064 | |
1065 | for (i = 0; i < MD_SB_BYTES/4 ; i++) | |
1066 | newcsum += sb32[i]; | |
1067 | csum = (newcsum & 0xffffffff) + (newcsum>>32); | |
1068 | ||
4d167f09 N |
1069 | #ifdef CONFIG_ALPHA |
1070 | /* This used to use csum_partial, which was wrong for several | |
1071 | * reasons including that different results are returned on | |
1072 | * different architectures. It isn't critical that we get exactly | |
1073 | * the same return value as before (we always csum_fold before | |
1074 | * testing, and that removes any differences). However as we | |
1075 | * know that csum_partial always returned a 16bit value on | |
1076 | * alphas, do a fold to maximise conformity to previous behaviour. | |
1077 | */ | |
1078 | sb->sb_csum = md_csum_fold(disk_csum); | |
1079 | #else | |
1da177e4 | 1080 | sb->sb_csum = disk_csum; |
4d167f09 | 1081 | #endif |
1da177e4 LT |
1082 | return csum; |
1083 | } | |
1084 | ||
1da177e4 LT |
1085 | /* |
1086 | * Handle superblock details. | |
1087 | * We want to be able to handle multiple superblock formats | |
1088 | * so we have a common interface to them all, and an array of | |
1089 | * different handlers. | |
1090 | * We rely on user-space to write the initial superblock, and support | |
1091 | * reading and updating of superblocks. | |
1092 | * Interface methods are: | |
3cb03002 | 1093 | * int load_super(struct md_rdev *dev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1094 | * loads and validates a superblock on dev. |
1095 | * if refdev != NULL, compare superblocks on both devices | |
1096 | * Return: | |
1097 | * 0 - dev has a superblock that is compatible with refdev | |
1098 | * 1 - dev has a superblock that is compatible and newer than refdev | |
1099 | * so dev should be used as the refdev in future | |
1100 | * -EINVAL superblock incompatible or invalid | |
1101 | * -othererror e.g. -EIO | |
1102 | * | |
fd01b88c | 1103 | * int validate_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1104 | * Verify that dev is acceptable into mddev. |
1105 | * The first time, mddev->raid_disks will be 0, and data from | |
1106 | * dev should be merged in. Subsequent calls check that dev | |
1107 | * is new enough. Return 0 or -EINVAL | |
1108 | * | |
fd01b88c | 1109 | * void sync_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1110 | * Update the superblock for rdev with data in mddev |
1111 | * This does not write to disc. | |
1112 | * | |
1113 | */ | |
1114 | ||
1115 | struct super_type { | |
0cd17fec CW |
1116 | char *name; |
1117 | struct module *owner; | |
c6563a8c N |
1118 | int (*load_super)(struct md_rdev *rdev, |
1119 | struct md_rdev *refdev, | |
0cd17fec | 1120 | int minor_version); |
c6563a8c N |
1121 | int (*validate_super)(struct mddev *mddev, |
1122 | struct md_rdev *rdev); | |
1123 | void (*sync_super)(struct mddev *mddev, | |
1124 | struct md_rdev *rdev); | |
3cb03002 | 1125 | unsigned long long (*rdev_size_change)(struct md_rdev *rdev, |
15f4a5fd | 1126 | sector_t num_sectors); |
c6563a8c N |
1127 | int (*allow_new_offset)(struct md_rdev *rdev, |
1128 | unsigned long long new_offset); | |
1da177e4 LT |
1129 | }; |
1130 | ||
0894cc30 AN |
1131 | /* |
1132 | * Check that the given mddev has no bitmap. | |
1133 | * | |
1134 | * This function is called from the run method of all personalities that do not | |
1135 | * support bitmaps. It prints an error message and returns non-zero if mddev | |
1136 | * has a bitmap. Otherwise, it returns 0. | |
1137 | * | |
1138 | */ | |
fd01b88c | 1139 | int md_check_no_bitmap(struct mddev *mddev) |
0894cc30 | 1140 | { |
c3d9714e | 1141 | if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset) |
0894cc30 | 1142 | return 0; |
9d48739e | 1143 | pr_warn("%s: bitmaps are not supported for %s\n", |
0894cc30 AN |
1144 | mdname(mddev), mddev->pers->name); |
1145 | return 1; | |
1146 | } | |
1147 | EXPORT_SYMBOL(md_check_no_bitmap); | |
1148 | ||
1da177e4 | 1149 | /* |
f72ffdd6 | 1150 | * load_super for 0.90.0 |
1da177e4 | 1151 | */ |
3cb03002 | 1152 | static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 | 1153 | { |
1da177e4 LT |
1154 | mdp_super_t *sb; |
1155 | int ret; | |
228fc7d7 | 1156 | bool spare_disk = true; |
1da177e4 LT |
1157 | |
1158 | /* | |
0f420358 | 1159 | * Calculate the position of the superblock (512byte sectors), |
1da177e4 LT |
1160 | * it's at the end of the disk. |
1161 | * | |
1162 | * It also happens to be a multiple of 4Kb. | |
1163 | */ | |
57b2caa3 | 1164 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 1165 | |
0002b271 | 1166 | ret = read_disk_sb(rdev, MD_SB_BYTES); |
9d48739e N |
1167 | if (ret) |
1168 | return ret; | |
1da177e4 LT |
1169 | |
1170 | ret = -EINVAL; | |
1171 | ||
65a06f06 | 1172 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1173 | |
1174 | if (sb->md_magic != MD_SB_MAGIC) { | |
913cce5a CH |
1175 | pr_warn("md: invalid raid superblock magic on %pg\n", |
1176 | rdev->bdev); | |
1da177e4 LT |
1177 | goto abort; |
1178 | } | |
1179 | ||
1180 | if (sb->major_version != 0 || | |
f6705578 N |
1181 | sb->minor_version < 90 || |
1182 | sb->minor_version > 91) { | |
913cce5a CH |
1183 | pr_warn("Bad version number %d.%d on %pg\n", |
1184 | sb->major_version, sb->minor_version, rdev->bdev); | |
1da177e4 LT |
1185 | goto abort; |
1186 | } | |
1187 | ||
1188 | if (sb->raid_disks <= 0) | |
1189 | goto abort; | |
1190 | ||
4d167f09 | 1191 | if (md_csum_fold(calc_sb_csum(sb)) != md_csum_fold(sb->sb_csum)) { |
913cce5a | 1192 | pr_warn("md: invalid superblock checksum on %pg\n", rdev->bdev); |
1da177e4 LT |
1193 | goto abort; |
1194 | } | |
1195 | ||
1196 | rdev->preferred_minor = sb->md_minor; | |
1197 | rdev->data_offset = 0; | |
c6563a8c | 1198 | rdev->new_data_offset = 0; |
0002b271 | 1199 | rdev->sb_size = MD_SB_BYTES; |
9f2f3830 | 1200 | rdev->badblocks.shift = -1; |
1da177e4 LT |
1201 | |
1202 | if (sb->level == LEVEL_MULTIPATH) | |
1203 | rdev->desc_nr = -1; | |
1204 | else | |
1205 | rdev->desc_nr = sb->this_disk.number; | |
1206 | ||
228fc7d7 YY |
1207 | /* not spare disk, or LEVEL_MULTIPATH */ |
1208 | if (sb->level == LEVEL_MULTIPATH || | |
1209 | (rdev->desc_nr >= 0 && | |
3b7436cc | 1210 | rdev->desc_nr < MD_SB_DISKS && |
228fc7d7 YY |
1211 | sb->disks[rdev->desc_nr].state & |
1212 | ((1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE)))) | |
1213 | spare_disk = false; | |
1214 | ||
9a7b2b0f | 1215 | if (!refdev) { |
228fc7d7 | 1216 | if (!spare_disk) |
6a5cb53a YY |
1217 | ret = 1; |
1218 | else | |
1219 | ret = 0; | |
9a7b2b0f | 1220 | } else { |
1da177e4 | 1221 | __u64 ev1, ev2; |
65a06f06 | 1222 | mdp_super_t *refsb = page_address(refdev->sb_page); |
e6fd2093 | 1223 | if (!md_uuid_equal(refsb, sb)) { |
913cce5a CH |
1224 | pr_warn("md: %pg has different UUID to %pg\n", |
1225 | rdev->bdev, refdev->bdev); | |
1da177e4 LT |
1226 | goto abort; |
1227 | } | |
e6fd2093 | 1228 | if (!md_sb_equal(refsb, sb)) { |
913cce5a CH |
1229 | pr_warn("md: %pg has same UUID but different superblock to %pg\n", |
1230 | rdev->bdev, refdev->bdev); | |
1da177e4 LT |
1231 | goto abort; |
1232 | } | |
1233 | ev1 = md_event(sb); | |
1234 | ev2 = md_event(refsb); | |
6a5cb53a | 1235 | |
228fc7d7 | 1236 | if (!spare_disk && ev1 > ev2) |
1da177e4 | 1237 | ret = 1; |
f72ffdd6 | 1238 | else |
1da177e4 LT |
1239 | ret = 0; |
1240 | } | |
8190e754 | 1241 | rdev->sectors = rdev->sb_start; |
667a5313 N |
1242 | /* Limit to 4TB as metadata cannot record more than that. |
1243 | * (not needed for Linear and RAID0 as metadata doesn't | |
1244 | * record this size) | |
1245 | */ | |
72deb455 | 1246 | if ((u64)rdev->sectors >= (2ULL << 32) && sb->level >= 1) |
3312c951 | 1247 | rdev->sectors = (sector_t)(2ULL << 32) - 2; |
1da177e4 | 1248 | |
27a7b260 | 1249 | if (rdev->sectors < ((sector_t)sb->size) * 2 && sb->level >= 1) |
2bf071bf N |
1250 | /* "this cannot possibly happen" ... */ |
1251 | ret = -EINVAL; | |
1252 | ||
1da177e4 LT |
1253 | abort: |
1254 | return ret; | |
1255 | } | |
1256 | ||
1257 | /* | |
1258 | * validate_super for 0.90.0 | |
1259 | */ | |
fd01b88c | 1260 | static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1261 | { |
1262 | mdp_disk_t *desc; | |
65a06f06 | 1263 | mdp_super_t *sb = page_address(rdev->sb_page); |
07d84d10 | 1264 | __u64 ev1 = md_event(sb); |
1da177e4 | 1265 | |
41158c7e | 1266 | rdev->raid_disk = -1; |
c5d79adb N |
1267 | clear_bit(Faulty, &rdev->flags); |
1268 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1269 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1270 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1271 | |
1da177e4 LT |
1272 | if (mddev->raid_disks == 0) { |
1273 | mddev->major_version = 0; | |
1274 | mddev->minor_version = sb->minor_version; | |
1275 | mddev->patch_version = sb->patch_version; | |
e691063a | 1276 | mddev->external = 0; |
9d8f0363 | 1277 | mddev->chunk_sectors = sb->chunk_size >> 9; |
1da177e4 LT |
1278 | mddev->ctime = sb->ctime; |
1279 | mddev->utime = sb->utime; | |
1280 | mddev->level = sb->level; | |
d9d166c2 | 1281 | mddev->clevel[0] = 0; |
1da177e4 LT |
1282 | mddev->layout = sb->layout; |
1283 | mddev->raid_disks = sb->raid_disks; | |
27a7b260 | 1284 | mddev->dev_sectors = ((sector_t)sb->size) * 2; |
07d84d10 | 1285 | mddev->events = ev1; |
c3d9714e | 1286 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1287 | mddev->bitmap_info.space = 0; |
1288 | /* bitmap can use 60 K after the 4K superblocks */ | |
c3d9714e | 1289 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 1290 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
2c810cdd | 1291 | mddev->reshape_backwards = 0; |
1da177e4 | 1292 | |
f6705578 N |
1293 | if (mddev->minor_version >= 91) { |
1294 | mddev->reshape_position = sb->reshape_position; | |
1295 | mddev->delta_disks = sb->delta_disks; | |
1296 | mddev->new_level = sb->new_level; | |
1297 | mddev->new_layout = sb->new_layout; | |
664e7c41 | 1298 | mddev->new_chunk_sectors = sb->new_chunk >> 9; |
2c810cdd N |
1299 | if (mddev->delta_disks < 0) |
1300 | mddev->reshape_backwards = 1; | |
f6705578 N |
1301 | } else { |
1302 | mddev->reshape_position = MaxSector; | |
1303 | mddev->delta_disks = 0; | |
1304 | mddev->new_level = mddev->level; | |
1305 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1306 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 | 1307 | } |
33f2c35a N |
1308 | if (mddev->level == 0) |
1309 | mddev->layout = -1; | |
f6705578 | 1310 | |
1da177e4 LT |
1311 | if (sb->state & (1<<MD_SB_CLEAN)) |
1312 | mddev->recovery_cp = MaxSector; | |
1313 | else { | |
f72ffdd6 | 1314 | if (sb->events_hi == sb->cp_events_hi && |
1da177e4 LT |
1315 | sb->events_lo == sb->cp_events_lo) { |
1316 | mddev->recovery_cp = sb->recovery_cp; | |
1317 | } else | |
1318 | mddev->recovery_cp = 0; | |
1319 | } | |
1320 | ||
1321 | memcpy(mddev->uuid+0, &sb->set_uuid0, 4); | |
1322 | memcpy(mddev->uuid+4, &sb->set_uuid1, 4); | |
1323 | memcpy(mddev->uuid+8, &sb->set_uuid2, 4); | |
1324 | memcpy(mddev->uuid+12,&sb->set_uuid3, 4); | |
1325 | ||
1326 | mddev->max_disks = MD_SB_DISKS; | |
a654b9d8 N |
1327 | |
1328 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT) && | |
6409bb05 | 1329 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1330 | mddev->bitmap_info.offset = |
1331 | mddev->bitmap_info.default_offset; | |
6409bb05 | 1332 | mddev->bitmap_info.space = |
c9ad020f | 1333 | mddev->bitmap_info.default_space; |
6409bb05 | 1334 | } |
a654b9d8 | 1335 | |
41158c7e | 1336 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1337 | /* Insist on good event counter while assembling, except |
1338 | * for spares (which don't need an event count) */ | |
1da177e4 | 1339 | ++ev1; |
be6800a7 N |
1340 | if (sb->disks[rdev->desc_nr].state & ( |
1341 | (1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE))) | |
f72ffdd6 | 1342 | if (ev1 < mddev->events) |
be6800a7 | 1343 | return -EINVAL; |
41158c7e N |
1344 | } else if (mddev->bitmap) { |
1345 | /* if adding to array with a bitmap, then we can accept an | |
1346 | * older device ... but not too old. | |
1347 | */ | |
41158c7e N |
1348 | if (ev1 < mddev->bitmap->events_cleared) |
1349 | return 0; | |
8313b8e5 N |
1350 | if (ev1 < mddev->events) |
1351 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1352 | } else { |
1353 | if (ev1 < mddev->events) | |
1354 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1355 | return 0; | |
1356 | } | |
41158c7e | 1357 | |
1da177e4 | 1358 | if (mddev->level != LEVEL_MULTIPATH) { |
1da177e4 LT |
1359 | desc = sb->disks + rdev->desc_nr; |
1360 | ||
1361 | if (desc->state & (1<<MD_DISK_FAULTY)) | |
b2d444d7 | 1362 | set_bit(Faulty, &rdev->flags); |
7c7546cc N |
1363 | else if (desc->state & (1<<MD_DISK_SYNC) /* && |
1364 | desc->raid_disk < mddev->raid_disks */) { | |
b2d444d7 | 1365 | set_bit(In_sync, &rdev->flags); |
1da177e4 | 1366 | rdev->raid_disk = desc->raid_disk; |
f466722c | 1367 | rdev->saved_raid_disk = desc->raid_disk; |
0261cd9f N |
1368 | } else if (desc->state & (1<<MD_DISK_ACTIVE)) { |
1369 | /* active but not in sync implies recovery up to | |
1370 | * reshape position. We don't know exactly where | |
1371 | * that is, so set to zero for now */ | |
1372 | if (mddev->minor_version >= 91) { | |
1373 | rdev->recovery_offset = 0; | |
1374 | rdev->raid_disk = desc->raid_disk; | |
1375 | } | |
1da177e4 | 1376 | } |
8ddf9efe N |
1377 | if (desc->state & (1<<MD_DISK_WRITEMOSTLY)) |
1378 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1379 | if (desc->state & (1<<MD_DISK_FAILFAST)) |
1380 | set_bit(FailFast, &rdev->flags); | |
41158c7e | 1381 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1382 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1383 | return 0; |
1384 | } | |
1385 | ||
1386 | /* | |
1387 | * sync_super for 0.90.0 | |
1388 | */ | |
fd01b88c | 1389 | static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1390 | { |
1391 | mdp_super_t *sb; | |
3cb03002 | 1392 | struct md_rdev *rdev2; |
1da177e4 | 1393 | int next_spare = mddev->raid_disks; |
19133a42 | 1394 | |
1da177e4 LT |
1395 | /* make rdev->sb match mddev data.. |
1396 | * | |
1397 | * 1/ zero out disks | |
1398 | * 2/ Add info for each disk, keeping track of highest desc_nr (next_spare); | |
1399 | * 3/ any empty disks < next_spare become removed | |
1400 | * | |
1401 | * disks[0] gets initialised to REMOVED because | |
1402 | * we cannot be sure from other fields if it has | |
1403 | * been initialised or not. | |
1404 | */ | |
1405 | int i; | |
1406 | int active=0, working=0,failed=0,spare=0,nr_disks=0; | |
1407 | ||
61181565 N |
1408 | rdev->sb_size = MD_SB_BYTES; |
1409 | ||
65a06f06 | 1410 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1411 | |
1412 | memset(sb, 0, sizeof(*sb)); | |
1413 | ||
1414 | sb->md_magic = MD_SB_MAGIC; | |
1415 | sb->major_version = mddev->major_version; | |
1da177e4 LT |
1416 | sb->patch_version = mddev->patch_version; |
1417 | sb->gvalid_words = 0; /* ignored */ | |
1418 | memcpy(&sb->set_uuid0, mddev->uuid+0, 4); | |
1419 | memcpy(&sb->set_uuid1, mddev->uuid+4, 4); | |
1420 | memcpy(&sb->set_uuid2, mddev->uuid+8, 4); | |
1421 | memcpy(&sb->set_uuid3, mddev->uuid+12,4); | |
1422 | ||
9ebc6ef1 | 1423 | sb->ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 1424 | sb->level = mddev->level; |
58c0fed4 | 1425 | sb->size = mddev->dev_sectors / 2; |
1da177e4 LT |
1426 | sb->raid_disks = mddev->raid_disks; |
1427 | sb->md_minor = mddev->md_minor; | |
e691063a | 1428 | sb->not_persistent = 0; |
9ebc6ef1 | 1429 | sb->utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
1430 | sb->state = 0; |
1431 | sb->events_hi = (mddev->events>>32); | |
1432 | sb->events_lo = (u32)mddev->events; | |
1433 | ||
f6705578 N |
1434 | if (mddev->reshape_position == MaxSector) |
1435 | sb->minor_version = 90; | |
1436 | else { | |
1437 | sb->minor_version = 91; | |
1438 | sb->reshape_position = mddev->reshape_position; | |
1439 | sb->new_level = mddev->new_level; | |
1440 | sb->delta_disks = mddev->delta_disks; | |
1441 | sb->new_layout = mddev->new_layout; | |
664e7c41 | 1442 | sb->new_chunk = mddev->new_chunk_sectors << 9; |
f6705578 N |
1443 | } |
1444 | mddev->minor_version = sb->minor_version; | |
1da177e4 LT |
1445 | if (mddev->in_sync) |
1446 | { | |
1447 | sb->recovery_cp = mddev->recovery_cp; | |
1448 | sb->cp_events_hi = (mddev->events>>32); | |
1449 | sb->cp_events_lo = (u32)mddev->events; | |
1450 | if (mddev->recovery_cp == MaxSector) | |
1451 | sb->state = (1<< MD_SB_CLEAN); | |
1452 | } else | |
1453 | sb->recovery_cp = 0; | |
1454 | ||
1455 | sb->layout = mddev->layout; | |
9d8f0363 | 1456 | sb->chunk_size = mddev->chunk_sectors << 9; |
1da177e4 | 1457 | |
c3d9714e | 1458 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) |
a654b9d8 N |
1459 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); |
1460 | ||
1da177e4 | 1461 | sb->disks[0].state = (1<<MD_DISK_REMOVED); |
dafb20fa | 1462 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1463 | mdp_disk_t *d; |
86e6ffdd | 1464 | int desc_nr; |
0261cd9f N |
1465 | int is_active = test_bit(In_sync, &rdev2->flags); |
1466 | ||
1467 | if (rdev2->raid_disk >= 0 && | |
1468 | sb->minor_version >= 91) | |
1469 | /* we have nowhere to store the recovery_offset, | |
1470 | * but if it is not below the reshape_position, | |
1471 | * we can piggy-back on that. | |
1472 | */ | |
1473 | is_active = 1; | |
1474 | if (rdev2->raid_disk < 0 || | |
1475 | test_bit(Faulty, &rdev2->flags)) | |
1476 | is_active = 0; | |
1477 | if (is_active) | |
86e6ffdd | 1478 | desc_nr = rdev2->raid_disk; |
1da177e4 | 1479 | else |
86e6ffdd | 1480 | desc_nr = next_spare++; |
19133a42 | 1481 | rdev2->desc_nr = desc_nr; |
1da177e4 LT |
1482 | d = &sb->disks[rdev2->desc_nr]; |
1483 | nr_disks++; | |
1484 | d->number = rdev2->desc_nr; | |
1485 | d->major = MAJOR(rdev2->bdev->bd_dev); | |
1486 | d->minor = MINOR(rdev2->bdev->bd_dev); | |
0261cd9f | 1487 | if (is_active) |
1da177e4 LT |
1488 | d->raid_disk = rdev2->raid_disk; |
1489 | else | |
1490 | d->raid_disk = rdev2->desc_nr; /* compatibility */ | |
1be7892f | 1491 | if (test_bit(Faulty, &rdev2->flags)) |
1da177e4 | 1492 | d->state = (1<<MD_DISK_FAULTY); |
0261cd9f | 1493 | else if (is_active) { |
1da177e4 | 1494 | d->state = (1<<MD_DISK_ACTIVE); |
0261cd9f N |
1495 | if (test_bit(In_sync, &rdev2->flags)) |
1496 | d->state |= (1<<MD_DISK_SYNC); | |
1da177e4 LT |
1497 | active++; |
1498 | working++; | |
1499 | } else { | |
1500 | d->state = 0; | |
1501 | spare++; | |
1502 | working++; | |
1503 | } | |
8ddf9efe N |
1504 | if (test_bit(WriteMostly, &rdev2->flags)) |
1505 | d->state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
1506 | if (test_bit(FailFast, &rdev2->flags)) |
1507 | d->state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 | 1508 | } |
1da177e4 LT |
1509 | /* now set the "removed" and "faulty" bits on any missing devices */ |
1510 | for (i=0 ; i < mddev->raid_disks ; i++) { | |
1511 | mdp_disk_t *d = &sb->disks[i]; | |
1512 | if (d->state == 0 && d->number == 0) { | |
1513 | d->number = i; | |
1514 | d->raid_disk = i; | |
1515 | d->state = (1<<MD_DISK_REMOVED); | |
1516 | d->state |= (1<<MD_DISK_FAULTY); | |
1517 | failed++; | |
1518 | } | |
1519 | } | |
1520 | sb->nr_disks = nr_disks; | |
1521 | sb->active_disks = active; | |
1522 | sb->working_disks = working; | |
1523 | sb->failed_disks = failed; | |
1524 | sb->spare_disks = spare; | |
1525 | ||
1526 | sb->this_disk = sb->disks[rdev->desc_nr]; | |
1527 | sb->sb_csum = calc_sb_csum(sb); | |
1528 | } | |
1529 | ||
0cd17fec CW |
1530 | /* |
1531 | * rdev_size_change for 0.90.0 | |
1532 | */ | |
1533 | static unsigned long long | |
3cb03002 | 1534 | super_90_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec | 1535 | { |
58c0fed4 | 1536 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1537 | return 0; /* component must fit device */ |
c3d9714e | 1538 | if (rdev->mddev->bitmap_info.offset) |
0cd17fec | 1539 | return 0; /* can't move bitmap */ |
57b2caa3 | 1540 | rdev->sb_start = calc_dev_sboffset(rdev); |
15f4a5fd AN |
1541 | if (!num_sectors || num_sectors > rdev->sb_start) |
1542 | num_sectors = rdev->sb_start; | |
27a7b260 N |
1543 | /* Limit to 4TB as metadata cannot record more than that. |
1544 | * 4TB == 2^32 KB, or 2*2^32 sectors. | |
1545 | */ | |
72deb455 | 1546 | if ((u64)num_sectors >= (2ULL << 32) && rdev->mddev->level >= 1) |
3312c951 | 1547 | num_sectors = (sector_t)(2ULL << 32) - 2; |
46533ff7 N |
1548 | do { |
1549 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
0cd17fec | 1550 | rdev->sb_page); |
46533ff7 | 1551 | } while (md_super_wait(rdev->mddev) < 0); |
c26a44ed | 1552 | return num_sectors; |
0cd17fec CW |
1553 | } |
1554 | ||
c6563a8c N |
1555 | static int |
1556 | super_90_allow_new_offset(struct md_rdev *rdev, unsigned long long new_offset) | |
1557 | { | |
1558 | /* non-zero offset changes not possible with v0.90 */ | |
1559 | return new_offset == 0; | |
1560 | } | |
0cd17fec | 1561 | |
1da177e4 LT |
1562 | /* |
1563 | * version 1 superblock | |
1564 | */ | |
1565 | ||
f72ffdd6 | 1566 | static __le32 calc_sb_1_csum(struct mdp_superblock_1 *sb) |
1da177e4 | 1567 | { |
1c05b4bc N |
1568 | __le32 disk_csum; |
1569 | u32 csum; | |
1da177e4 LT |
1570 | unsigned long long newcsum; |
1571 | int size = 256 + le32_to_cpu(sb->max_dev)*2; | |
1c05b4bc | 1572 | __le32 *isuper = (__le32*)sb; |
1da177e4 LT |
1573 | |
1574 | disk_csum = sb->sb_csum; | |
1575 | sb->sb_csum = 0; | |
1576 | newcsum = 0; | |
1f3c9907 | 1577 | for (; size >= 4; size -= 4) |
1da177e4 LT |
1578 | newcsum += le32_to_cpu(*isuper++); |
1579 | ||
1580 | if (size == 2) | |
1c05b4bc | 1581 | newcsum += le16_to_cpu(*(__le16*) isuper); |
1da177e4 LT |
1582 | |
1583 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
1584 | sb->sb_csum = disk_csum; | |
1585 | return cpu_to_le32(csum); | |
1586 | } | |
1587 | ||
3cb03002 | 1588 | static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1589 | { |
1590 | struct mdp_superblock_1 *sb; | |
1591 | int ret; | |
0f420358 | 1592 | sector_t sb_start; |
c6563a8c | 1593 | sector_t sectors; |
0002b271 | 1594 | int bmask; |
228fc7d7 | 1595 | bool spare_disk = true; |
1da177e4 LT |
1596 | |
1597 | /* | |
0f420358 | 1598 | * Calculate the position of the superblock in 512byte sectors. |
1da177e4 LT |
1599 | * It is always aligned to a 4K boundary and |
1600 | * depeding on minor_version, it can be: | |
1601 | * 0: At least 8K, but less than 12K, from end of device | |
1602 | * 1: At start of device | |
1603 | * 2: 4K from start of device. | |
1604 | */ | |
1605 | switch(minor_version) { | |
1606 | case 0: | |
0fe80347 | 1607 | sb_start = bdev_nr_sectors(rdev->bdev) - 8 * 2; |
0f420358 | 1608 | sb_start &= ~(sector_t)(4*2-1); |
1da177e4 LT |
1609 | break; |
1610 | case 1: | |
0f420358 | 1611 | sb_start = 0; |
1da177e4 LT |
1612 | break; |
1613 | case 2: | |
0f420358 | 1614 | sb_start = 8; |
1da177e4 LT |
1615 | break; |
1616 | default: | |
1617 | return -EINVAL; | |
1618 | } | |
0f420358 | 1619 | rdev->sb_start = sb_start; |
1da177e4 | 1620 | |
0002b271 N |
1621 | /* superblock is rarely larger than 1K, but it can be larger, |
1622 | * and it is safe to read 4k, so we do that | |
1623 | */ | |
1624 | ret = read_disk_sb(rdev, 4096); | |
1da177e4 LT |
1625 | if (ret) return ret; |
1626 | ||
65a06f06 | 1627 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1628 | |
1629 | if (sb->magic != cpu_to_le32(MD_SB_MAGIC) || | |
1630 | sb->major_version != cpu_to_le32(1) || | |
1631 | le32_to_cpu(sb->max_dev) > (4096-256)/2 || | |
0f420358 | 1632 | le64_to_cpu(sb->super_offset) != rdev->sb_start || |
71c0805c | 1633 | (le32_to_cpu(sb->feature_map) & ~MD_FEATURE_ALL) != 0) |
1da177e4 LT |
1634 | return -EINVAL; |
1635 | ||
1636 | if (calc_sb_1_csum(sb) != sb->sb_csum) { | |
913cce5a CH |
1637 | pr_warn("md: invalid superblock checksum on %pg\n", |
1638 | rdev->bdev); | |
1da177e4 LT |
1639 | return -EINVAL; |
1640 | } | |
1641 | if (le64_to_cpu(sb->data_size) < 10) { | |
913cce5a CH |
1642 | pr_warn("md: data_size too small on %pg\n", |
1643 | rdev->bdev); | |
1da177e4 LT |
1644 | return -EINVAL; |
1645 | } | |
c6563a8c N |
1646 | if (sb->pad0 || |
1647 | sb->pad3[0] || | |
1648 | memcmp(sb->pad3, sb->pad3+1, sizeof(sb->pad3) - sizeof(sb->pad3[1]))) | |
1649 | /* Some padding is non-zero, might be a new feature */ | |
1650 | return -EINVAL; | |
e11e93fa | 1651 | |
1da177e4 LT |
1652 | rdev->preferred_minor = 0xffff; |
1653 | rdev->data_offset = le64_to_cpu(sb->data_offset); | |
c6563a8c N |
1654 | rdev->new_data_offset = rdev->data_offset; |
1655 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE) && | |
1656 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) | |
1657 | rdev->new_data_offset += (s32)le32_to_cpu(sb->new_offset); | |
4dbcdc75 | 1658 | atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read)); |
1da177e4 | 1659 | |
0002b271 | 1660 | rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256; |
e1defc4f | 1661 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; |
0002b271 | 1662 | if (rdev->sb_size & bmask) |
a1801f85 N |
1663 | rdev->sb_size = (rdev->sb_size | bmask) + 1; |
1664 | ||
1665 | if (minor_version | |
0f420358 | 1666 | && rdev->data_offset < sb_start + (rdev->sb_size/512)) |
a1801f85 | 1667 | return -EINVAL; |
c6563a8c N |
1668 | if (minor_version |
1669 | && rdev->new_data_offset < sb_start + (rdev->sb_size/512)) | |
1670 | return -EINVAL; | |
0002b271 | 1671 | |
31b65a0d N |
1672 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH)) |
1673 | rdev->desc_nr = -1; | |
1674 | else | |
1675 | rdev->desc_nr = le32_to_cpu(sb->dev_number); | |
1676 | ||
2699b672 N |
1677 | if (!rdev->bb_page) { |
1678 | rdev->bb_page = alloc_page(GFP_KERNEL); | |
1679 | if (!rdev->bb_page) | |
1680 | return -ENOMEM; | |
1681 | } | |
1682 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BAD_BLOCKS) && | |
1683 | rdev->badblocks.count == 0) { | |
1684 | /* need to load the bad block list. | |
1685 | * Currently we limit it to one page. | |
1686 | */ | |
1687 | s32 offset; | |
1688 | sector_t bb_sector; | |
00485d09 | 1689 | __le64 *bbp; |
2699b672 N |
1690 | int i; |
1691 | int sectors = le16_to_cpu(sb->bblog_size); | |
1692 | if (sectors > (PAGE_SIZE / 512)) | |
1693 | return -EINVAL; | |
1694 | offset = le32_to_cpu(sb->bblog_offset); | |
1695 | if (offset == 0) | |
1696 | return -EINVAL; | |
1697 | bb_sector = (long long)offset; | |
1698 | if (!sync_page_io(rdev, bb_sector, sectors << 9, | |
4ce4c73f | 1699 | rdev->bb_page, REQ_OP_READ, true)) |
2699b672 | 1700 | return -EIO; |
00485d09 | 1701 | bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
1702 | rdev->badblocks.shift = sb->bblog_shift; |
1703 | for (i = 0 ; i < (sectors << (9-3)) ; i++, bbp++) { | |
1704 | u64 bb = le64_to_cpu(*bbp); | |
1705 | int count = bb & (0x3ff); | |
1706 | u64 sector = bb >> 10; | |
1707 | sector <<= sb->bblog_shift; | |
1708 | count <<= sb->bblog_shift; | |
1709 | if (bb + 1 == 0) | |
1710 | break; | |
fc974ee2 | 1711 | if (badblocks_set(&rdev->badblocks, sector, count, 1)) |
2699b672 N |
1712 | return -EINVAL; |
1713 | } | |
486adf72 N |
1714 | } else if (sb->bblog_offset != 0) |
1715 | rdev->badblocks.shift = 0; | |
2699b672 | 1716 | |
ddc08823 PB |
1717 | if ((le32_to_cpu(sb->feature_map) & |
1718 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS))) { | |
ea0213e0 AP |
1719 | rdev->ppl.offset = (__s16)le16_to_cpu(sb->ppl.offset); |
1720 | rdev->ppl.size = le16_to_cpu(sb->ppl.size); | |
1721 | rdev->ppl.sector = rdev->sb_start + rdev->ppl.offset; | |
1722 | } | |
1723 | ||
33f2c35a N |
1724 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT) && |
1725 | sb->level != 0) | |
1726 | return -EINVAL; | |
1727 | ||
228fc7d7 YY |
1728 | /* not spare disk, or LEVEL_MULTIPATH */ |
1729 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH) || | |
1730 | (rdev->desc_nr >= 0 && | |
1731 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
1732 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || | |
1733 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL))) | |
1734 | spare_disk = false; | |
6a5cb53a | 1735 | |
9a7b2b0f | 1736 | if (!refdev) { |
228fc7d7 | 1737 | if (!spare_disk) |
6a5cb53a YY |
1738 | ret = 1; |
1739 | else | |
1740 | ret = 0; | |
9a7b2b0f | 1741 | } else { |
1da177e4 | 1742 | __u64 ev1, ev2; |
65a06f06 | 1743 | struct mdp_superblock_1 *refsb = page_address(refdev->sb_page); |
1da177e4 LT |
1744 | |
1745 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16) != 0 || | |
1746 | sb->level != refsb->level || | |
1747 | sb->layout != refsb->layout || | |
1748 | sb->chunksize != refsb->chunksize) { | |
913cce5a CH |
1749 | pr_warn("md: %pg has strangely different superblock to %pg\n", |
1750 | rdev->bdev, | |
1751 | refdev->bdev); | |
1da177e4 LT |
1752 | return -EINVAL; |
1753 | } | |
1754 | ev1 = le64_to_cpu(sb->events); | |
1755 | ev2 = le64_to_cpu(refsb->events); | |
1756 | ||
228fc7d7 | 1757 | if (!spare_disk && ev1 > ev2) |
8ed75463 N |
1758 | ret = 1; |
1759 | else | |
1760 | ret = 0; | |
1da177e4 | 1761 | } |
0fe80347 CH |
1762 | if (minor_version) |
1763 | sectors = bdev_nr_sectors(rdev->bdev) - rdev->data_offset; | |
1764 | else | |
c6563a8c N |
1765 | sectors = rdev->sb_start; |
1766 | if (sectors < le64_to_cpu(sb->data_size)) | |
1da177e4 | 1767 | return -EINVAL; |
dd8ac336 | 1768 | rdev->sectors = le64_to_cpu(sb->data_size); |
8ed75463 | 1769 | return ret; |
1da177e4 LT |
1770 | } |
1771 | ||
fd01b88c | 1772 | static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 1773 | { |
65a06f06 | 1774 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
07d84d10 | 1775 | __u64 ev1 = le64_to_cpu(sb->events); |
1da177e4 | 1776 | |
41158c7e | 1777 | rdev->raid_disk = -1; |
c5d79adb N |
1778 | clear_bit(Faulty, &rdev->flags); |
1779 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1780 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1781 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1782 | |
1da177e4 LT |
1783 | if (mddev->raid_disks == 0) { |
1784 | mddev->major_version = 1; | |
1785 | mddev->patch_version = 0; | |
e691063a | 1786 | mddev->external = 0; |
9d8f0363 | 1787 | mddev->chunk_sectors = le32_to_cpu(sb->chunksize); |
9ebc6ef1 DD |
1788 | mddev->ctime = le64_to_cpu(sb->ctime); |
1789 | mddev->utime = le64_to_cpu(sb->utime); | |
1da177e4 | 1790 | mddev->level = le32_to_cpu(sb->level); |
d9d166c2 | 1791 | mddev->clevel[0] = 0; |
1da177e4 LT |
1792 | mddev->layout = le32_to_cpu(sb->layout); |
1793 | mddev->raid_disks = le32_to_cpu(sb->raid_disks); | |
58c0fed4 | 1794 | mddev->dev_sectors = le64_to_cpu(sb->size); |
07d84d10 | 1795 | mddev->events = ev1; |
c3d9714e | 1796 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1797 | mddev->bitmap_info.space = 0; |
1798 | /* Default location for bitmap is 1K after superblock | |
1799 | * using 3K - total of 4K | |
1800 | */ | |
c3d9714e | 1801 | mddev->bitmap_info.default_offset = 1024 >> 9; |
6409bb05 | 1802 | mddev->bitmap_info.default_space = (4096-1024) >> 9; |
2c810cdd N |
1803 | mddev->reshape_backwards = 0; |
1804 | ||
1da177e4 LT |
1805 | mddev->recovery_cp = le64_to_cpu(sb->resync_offset); |
1806 | memcpy(mddev->uuid, sb->set_uuid, 16); | |
1807 | ||
1808 | mddev->max_disks = (4096-256)/2; | |
a654b9d8 | 1809 | |
71c0805c | 1810 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) && |
6409bb05 | 1811 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1812 | mddev->bitmap_info.offset = |
1813 | (__s32)le32_to_cpu(sb->bitmap_offset); | |
6409bb05 N |
1814 | /* Metadata doesn't record how much space is available. |
1815 | * For 1.0, we assume we can use up to the superblock | |
1816 | * if before, else to 4K beyond superblock. | |
1817 | * For others, assume no change is possible. | |
1818 | */ | |
1819 | if (mddev->minor_version > 0) | |
1820 | mddev->bitmap_info.space = 0; | |
1821 | else if (mddev->bitmap_info.offset > 0) | |
1822 | mddev->bitmap_info.space = | |
1823 | 8 - mddev->bitmap_info.offset; | |
1824 | else | |
1825 | mddev->bitmap_info.space = | |
1826 | -mddev->bitmap_info.offset; | |
1827 | } | |
e11e93fa | 1828 | |
f6705578 N |
1829 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { |
1830 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); | |
1831 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); | |
1832 | mddev->new_level = le32_to_cpu(sb->new_level); | |
1833 | mddev->new_layout = le32_to_cpu(sb->new_layout); | |
664e7c41 | 1834 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_chunk); |
2c810cdd N |
1835 | if (mddev->delta_disks < 0 || |
1836 | (mddev->delta_disks == 0 && | |
1837 | (le32_to_cpu(sb->feature_map) | |
1838 | & MD_FEATURE_RESHAPE_BACKWARDS))) | |
1839 | mddev->reshape_backwards = 1; | |
f6705578 N |
1840 | } else { |
1841 | mddev->reshape_position = MaxSector; | |
1842 | mddev->delta_disks = 0; | |
1843 | mddev->new_level = mddev->level; | |
1844 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1845 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1846 | } |
1847 | ||
33f2c35a N |
1848 | if (mddev->level == 0 && |
1849 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT)) | |
1850 | mddev->layout = -1; | |
1851 | ||
486b0f7b | 1852 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL) |
a62ab49e | 1853 | set_bit(MD_HAS_JOURNAL, &mddev->flags); |
ea0213e0 | 1854 | |
ddc08823 PB |
1855 | if (le32_to_cpu(sb->feature_map) & |
1856 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS)) { | |
ea0213e0 AP |
1857 | if (le32_to_cpu(sb->feature_map) & |
1858 | (MD_FEATURE_BITMAP_OFFSET | MD_FEATURE_JOURNAL)) | |
1859 | return -EINVAL; | |
ddc08823 PB |
1860 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_PPL) && |
1861 | (le32_to_cpu(sb->feature_map) & | |
1862 | MD_FEATURE_MULTIPLE_PPLS)) | |
1863 | return -EINVAL; | |
ea0213e0 AP |
1864 | set_bit(MD_HAS_PPL, &mddev->flags); |
1865 | } | |
41158c7e | 1866 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1867 | /* Insist of good event counter while assembling, except for |
1868 | * spares (which don't need an event count) */ | |
1da177e4 | 1869 | ++ev1; |
be6800a7 N |
1870 | if (rdev->desc_nr >= 0 && |
1871 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
a3dfbdaa SL |
1872 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || |
1873 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL)) | |
be6800a7 N |
1874 | if (ev1 < mddev->events) |
1875 | return -EINVAL; | |
41158c7e N |
1876 | } else if (mddev->bitmap) { |
1877 | /* If adding to array with a bitmap, then we can accept an | |
1878 | * older device, but not too old. | |
1879 | */ | |
41158c7e N |
1880 | if (ev1 < mddev->bitmap->events_cleared) |
1881 | return 0; | |
8313b8e5 N |
1882 | if (ev1 < mddev->events) |
1883 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1884 | } else { |
1885 | if (ev1 < mddev->events) | |
1886 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1887 | return 0; | |
1888 | } | |
1da177e4 LT |
1889 | if (mddev->level != LEVEL_MULTIPATH) { |
1890 | int role; | |
3673f305 N |
1891 | if (rdev->desc_nr < 0 || |
1892 | rdev->desc_nr >= le32_to_cpu(sb->max_dev)) { | |
c4d4c91b | 1893 | role = MD_DISK_ROLE_SPARE; |
3673f305 N |
1894 | rdev->desc_nr = -1; |
1895 | } else | |
1896 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
1da177e4 | 1897 | switch(role) { |
c4d4c91b | 1898 | case MD_DISK_ROLE_SPARE: /* spare */ |
1da177e4 | 1899 | break; |
c4d4c91b | 1900 | case MD_DISK_ROLE_FAULTY: /* faulty */ |
b2d444d7 | 1901 | set_bit(Faulty, &rdev->flags); |
1da177e4 | 1902 | break; |
bac624f3 SL |
1903 | case MD_DISK_ROLE_JOURNAL: /* journal device */ |
1904 | if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL)) { | |
1905 | /* journal device without journal feature */ | |
9d48739e | 1906 | pr_warn("md: journal device provided without journal feature, ignoring the device\n"); |
bac624f3 SL |
1907 | return -EINVAL; |
1908 | } | |
1909 | set_bit(Journal, &rdev->flags); | |
3069aa8d | 1910 | rdev->journal_tail = le64_to_cpu(sb->journal_tail); |
9b15603d | 1911 | rdev->raid_disk = 0; |
bac624f3 | 1912 | break; |
1da177e4 | 1913 | default: |
f466722c | 1914 | rdev->saved_raid_disk = role; |
5fd6c1dc | 1915 | if ((le32_to_cpu(sb->feature_map) & |
f466722c | 1916 | MD_FEATURE_RECOVERY_OFFSET)) { |
5fd6c1dc | 1917 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); |
f466722c N |
1918 | if (!(le32_to_cpu(sb->feature_map) & |
1919 | MD_FEATURE_RECOVERY_BITMAP)) | |
1920 | rdev->saved_raid_disk = -1; | |
062f5b2a GJ |
1921 | } else { |
1922 | /* | |
1923 | * If the array is FROZEN, then the device can't | |
1924 | * be in_sync with rest of array. | |
1925 | */ | |
1926 | if (!test_bit(MD_RECOVERY_FROZEN, | |
1927 | &mddev->recovery)) | |
1928 | set_bit(In_sync, &rdev->flags); | |
1929 | } | |
1da177e4 LT |
1930 | rdev->raid_disk = role; |
1931 | break; | |
1932 | } | |
8ddf9efe N |
1933 | if (sb->devflags & WriteMostly1) |
1934 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1935 | if (sb->devflags & FailFast1) |
1936 | set_bit(FailFast, &rdev->flags); | |
2d78f8c4 N |
1937 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) |
1938 | set_bit(Replacement, &rdev->flags); | |
41158c7e | 1939 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1940 | set_bit(In_sync, &rdev->flags); |
41158c7e | 1941 | |
1da177e4 LT |
1942 | return 0; |
1943 | } | |
1944 | ||
fd01b88c | 1945 | static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1946 | { |
1947 | struct mdp_superblock_1 *sb; | |
3cb03002 | 1948 | struct md_rdev *rdev2; |
1da177e4 LT |
1949 | int max_dev, i; |
1950 | /* make rdev->sb match mddev and rdev data. */ | |
1951 | ||
65a06f06 | 1952 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1953 | |
1954 | sb->feature_map = 0; | |
1955 | sb->pad0 = 0; | |
5fd6c1dc | 1956 | sb->recovery_offset = cpu_to_le64(0); |
1da177e4 LT |
1957 | memset(sb->pad3, 0, sizeof(sb->pad3)); |
1958 | ||
1959 | sb->utime = cpu_to_le64((__u64)mddev->utime); | |
1960 | sb->events = cpu_to_le64(mddev->events); | |
1961 | if (mddev->in_sync) | |
1962 | sb->resync_offset = cpu_to_le64(mddev->recovery_cp); | |
bd18f646 SL |
1963 | else if (test_bit(MD_JOURNAL_CLEAN, &mddev->flags)) |
1964 | sb->resync_offset = cpu_to_le64(MaxSector); | |
1da177e4 LT |
1965 | else |
1966 | sb->resync_offset = cpu_to_le64(0); | |
1967 | ||
1c05b4bc | 1968 | sb->cnt_corrected_read = cpu_to_le32(atomic_read(&rdev->corrected_errors)); |
4dbcdc75 | 1969 | |
f0ca340c | 1970 | sb->raid_disks = cpu_to_le32(mddev->raid_disks); |
58c0fed4 | 1971 | sb->size = cpu_to_le64(mddev->dev_sectors); |
9d8f0363 | 1972 | sb->chunksize = cpu_to_le32(mddev->chunk_sectors); |
62e1e389 N |
1973 | sb->level = cpu_to_le32(mddev->level); |
1974 | sb->layout = cpu_to_le32(mddev->layout); | |
688834e6 N |
1975 | if (test_bit(FailFast, &rdev->flags)) |
1976 | sb->devflags |= FailFast1; | |
1977 | else | |
1978 | sb->devflags &= ~FailFast1; | |
f0ca340c | 1979 | |
aeb9b211 N |
1980 | if (test_bit(WriteMostly, &rdev->flags)) |
1981 | sb->devflags |= WriteMostly1; | |
1982 | else | |
1983 | sb->devflags &= ~WriteMostly1; | |
c6563a8c N |
1984 | sb->data_offset = cpu_to_le64(rdev->data_offset); |
1985 | sb->data_size = cpu_to_le64(rdev->sectors); | |
aeb9b211 | 1986 | |
c3d9714e N |
1987 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) { |
1988 | sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset); | |
71c0805c | 1989 | sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); |
a654b9d8 | 1990 | } |
5fd6c1dc | 1991 | |
f2076e7d | 1992 | if (rdev->raid_disk >= 0 && !test_bit(Journal, &rdev->flags) && |
97e4f42d | 1993 | !test_bit(In_sync, &rdev->flags)) { |
93be75ff N |
1994 | sb->feature_map |= |
1995 | cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET); | |
1996 | sb->recovery_offset = | |
1997 | cpu_to_le64(rdev->recovery_offset); | |
f466722c N |
1998 | if (rdev->saved_raid_disk >= 0 && mddev->bitmap) |
1999 | sb->feature_map |= | |
2000 | cpu_to_le32(MD_FEATURE_RECOVERY_BITMAP); | |
5fd6c1dc | 2001 | } |
3069aa8d SL |
2002 | /* Note: recovery_offset and journal_tail share space */ |
2003 | if (test_bit(Journal, &rdev->flags)) | |
2004 | sb->journal_tail = cpu_to_le64(rdev->journal_tail); | |
2d78f8c4 N |
2005 | if (test_bit(Replacement, &rdev->flags)) |
2006 | sb->feature_map |= | |
2007 | cpu_to_le32(MD_FEATURE_REPLACEMENT); | |
5fd6c1dc | 2008 | |
f6705578 N |
2009 | if (mddev->reshape_position != MaxSector) { |
2010 | sb->feature_map |= cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); | |
2011 | sb->reshape_position = cpu_to_le64(mddev->reshape_position); | |
2012 | sb->new_layout = cpu_to_le32(mddev->new_layout); | |
2013 | sb->delta_disks = cpu_to_le32(mddev->delta_disks); | |
2014 | sb->new_level = cpu_to_le32(mddev->new_level); | |
664e7c41 | 2015 | sb->new_chunk = cpu_to_le32(mddev->new_chunk_sectors); |
2c810cdd N |
2016 | if (mddev->delta_disks == 0 && |
2017 | mddev->reshape_backwards) | |
2018 | sb->feature_map | |
2019 | |= cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS); | |
c6563a8c N |
2020 | if (rdev->new_data_offset != rdev->data_offset) { |
2021 | sb->feature_map | |
2022 | |= cpu_to_le32(MD_FEATURE_NEW_OFFSET); | |
2023 | sb->new_offset = cpu_to_le32((__u32)(rdev->new_data_offset | |
2024 | - rdev->data_offset)); | |
2025 | } | |
f6705578 | 2026 | } |
a654b9d8 | 2027 | |
3c462c88 GR |
2028 | if (mddev_is_clustered(mddev)) |
2029 | sb->feature_map |= cpu_to_le32(MD_FEATURE_CLUSTERED); | |
2030 | ||
2699b672 N |
2031 | if (rdev->badblocks.count == 0) |
2032 | /* Nothing to do for bad blocks*/ ; | |
2033 | else if (sb->bblog_offset == 0) | |
2034 | /* Cannot record bad blocks on this device */ | |
2035 | md_error(mddev, rdev); | |
2036 | else { | |
2037 | struct badblocks *bb = &rdev->badblocks; | |
ae50640b | 2038 | __le64 *bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
2039 | u64 *p = bb->page; |
2040 | sb->feature_map |= cpu_to_le32(MD_FEATURE_BAD_BLOCKS); | |
2041 | if (bb->changed) { | |
2042 | unsigned seq; | |
2043 | ||
2044 | retry: | |
2045 | seq = read_seqbegin(&bb->lock); | |
2046 | ||
2047 | memset(bbp, 0xff, PAGE_SIZE); | |
2048 | ||
2049 | for (i = 0 ; i < bb->count ; i++) { | |
35f9ac2d | 2050 | u64 internal_bb = p[i]; |
2699b672 N |
2051 | u64 store_bb = ((BB_OFFSET(internal_bb) << 10) |
2052 | | BB_LEN(internal_bb)); | |
35f9ac2d | 2053 | bbp[i] = cpu_to_le64(store_bb); |
2699b672 | 2054 | } |
d0962936 | 2055 | bb->changed = 0; |
2699b672 N |
2056 | if (read_seqretry(&bb->lock, seq)) |
2057 | goto retry; | |
2058 | ||
2059 | bb->sector = (rdev->sb_start + | |
2060 | (int)le32_to_cpu(sb->bblog_offset)); | |
2061 | bb->size = le16_to_cpu(sb->bblog_size); | |
2699b672 N |
2062 | } |
2063 | } | |
2064 | ||
1da177e4 | 2065 | max_dev = 0; |
dafb20fa | 2066 | rdev_for_each(rdev2, mddev) |
1da177e4 LT |
2067 | if (rdev2->desc_nr+1 > max_dev) |
2068 | max_dev = rdev2->desc_nr+1; | |
a778b73f | 2069 | |
70471daf N |
2070 | if (max_dev > le32_to_cpu(sb->max_dev)) { |
2071 | int bmask; | |
a778b73f | 2072 | sb->max_dev = cpu_to_le32(max_dev); |
70471daf N |
2073 | rdev->sb_size = max_dev * 2 + 256; |
2074 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; | |
2075 | if (rdev->sb_size & bmask) | |
2076 | rdev->sb_size = (rdev->sb_size | bmask) + 1; | |
ddcf3522 N |
2077 | } else |
2078 | max_dev = le32_to_cpu(sb->max_dev); | |
2079 | ||
1da177e4 | 2080 | for (i=0; i<max_dev;i++) |
8df72024 | 2081 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
f72ffdd6 | 2082 | |
a97b7896 SL |
2083 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) |
2084 | sb->feature_map |= cpu_to_le32(MD_FEATURE_JOURNAL); | |
f72ffdd6 | 2085 | |
ea0213e0 | 2086 | if (test_bit(MD_HAS_PPL, &mddev->flags)) { |
ddc08823 PB |
2087 | if (test_bit(MD_HAS_MULTIPLE_PPLS, &mddev->flags)) |
2088 | sb->feature_map |= | |
2089 | cpu_to_le32(MD_FEATURE_MULTIPLE_PPLS); | |
2090 | else | |
2091 | sb->feature_map |= cpu_to_le32(MD_FEATURE_PPL); | |
ea0213e0 AP |
2092 | sb->ppl.offset = cpu_to_le16(rdev->ppl.offset); |
2093 | sb->ppl.size = cpu_to_le16(rdev->ppl.size); | |
2094 | } | |
2095 | ||
dafb20fa | 2096 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 2097 | i = rdev2->desc_nr; |
b2d444d7 | 2098 | if (test_bit(Faulty, &rdev2->flags)) |
c4d4c91b | 2099 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY); |
b2d444d7 | 2100 | else if (test_bit(In_sync, &rdev2->flags)) |
1da177e4 | 2101 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
a97b7896 | 2102 | else if (test_bit(Journal, &rdev2->flags)) |
bac624f3 | 2103 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_JOURNAL); |
93be75ff | 2104 | else if (rdev2->raid_disk >= 0) |
5fd6c1dc | 2105 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
1da177e4 | 2106 | else |
c4d4c91b | 2107 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
1da177e4 LT |
2108 | } |
2109 | ||
1da177e4 LT |
2110 | sb->sb_csum = calc_sb_1_csum(sb); |
2111 | } | |
2112 | ||
d9c0fa50 XN |
2113 | static sector_t super_1_choose_bm_space(sector_t dev_size) |
2114 | { | |
2115 | sector_t bm_space; | |
2116 | ||
2117 | /* if the device is bigger than 8Gig, save 64k for bitmap | |
2118 | * usage, if bigger than 200Gig, save 128k | |
2119 | */ | |
2120 | if (dev_size < 64*2) | |
2121 | bm_space = 0; | |
2122 | else if (dev_size - 64*2 >= 200*1024*1024*2) | |
2123 | bm_space = 128*2; | |
2124 | else if (dev_size - 4*2 > 8*1024*1024*2) | |
2125 | bm_space = 64*2; | |
2126 | else | |
2127 | bm_space = 4*2; | |
2128 | return bm_space; | |
2129 | } | |
2130 | ||
0cd17fec | 2131 | static unsigned long long |
3cb03002 | 2132 | super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec CW |
2133 | { |
2134 | struct mdp_superblock_1 *sb; | |
15f4a5fd | 2135 | sector_t max_sectors; |
58c0fed4 | 2136 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 2137 | return 0; /* component must fit device */ |
c6563a8c N |
2138 | if (rdev->data_offset != rdev->new_data_offset) |
2139 | return 0; /* too confusing */ | |
0f420358 | 2140 | if (rdev->sb_start < rdev->data_offset) { |
0cd17fec | 2141 | /* minor versions 1 and 2; superblock before data */ |
0fe80347 | 2142 | max_sectors = bdev_nr_sectors(rdev->bdev) - rdev->data_offset; |
15f4a5fd AN |
2143 | if (!num_sectors || num_sectors > max_sectors) |
2144 | num_sectors = max_sectors; | |
c3d9714e | 2145 | } else if (rdev->mddev->bitmap_info.offset) { |
0cd17fec CW |
2146 | /* minor version 0 with bitmap we can't move */ |
2147 | return 0; | |
2148 | } else { | |
2149 | /* minor version 0; superblock after data */ | |
d9c0fa50 | 2150 | sector_t sb_start, bm_space; |
0fe80347 | 2151 | sector_t dev_size = bdev_nr_sectors(rdev->bdev); |
d9c0fa50 XN |
2152 | |
2153 | /* 8K is for superblock */ | |
2154 | sb_start = dev_size - 8*2; | |
0f420358 | 2155 | sb_start &= ~(sector_t)(4*2 - 1); |
d9c0fa50 XN |
2156 | |
2157 | bm_space = super_1_choose_bm_space(dev_size); | |
2158 | ||
2159 | /* Space that can be used to store date needs to decrease | |
2160 | * superblock bitmap space and bad block space(4K) | |
2161 | */ | |
2162 | max_sectors = sb_start - bm_space - 4*2; | |
2163 | ||
15f4a5fd AN |
2164 | if (!num_sectors || num_sectors > max_sectors) |
2165 | num_sectors = max_sectors; | |
55df1ce0 | 2166 | rdev->sb_start = sb_start; |
0cd17fec | 2167 | } |
65a06f06 | 2168 | sb = page_address(rdev->sb_page); |
15f4a5fd | 2169 | sb->data_size = cpu_to_le64(num_sectors); |
3fb632e4 | 2170 | sb->super_offset = cpu_to_le64(rdev->sb_start); |
0cd17fec | 2171 | sb->sb_csum = calc_sb_1_csum(sb); |
46533ff7 N |
2172 | do { |
2173 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
2174 | rdev->sb_page); | |
2175 | } while (md_super_wait(rdev->mddev) < 0); | |
c26a44ed | 2176 | return num_sectors; |
c6563a8c N |
2177 | |
2178 | } | |
2179 | ||
2180 | static int | |
2181 | super_1_allow_new_offset(struct md_rdev *rdev, | |
2182 | unsigned long long new_offset) | |
2183 | { | |
2184 | /* All necessary checks on new >= old have been done */ | |
2185 | struct bitmap *bitmap; | |
2186 | if (new_offset >= rdev->data_offset) | |
2187 | return 1; | |
2188 | ||
2189 | /* with 1.0 metadata, there is no metadata to tread on | |
2190 | * so we can always move back */ | |
2191 | if (rdev->mddev->minor_version == 0) | |
2192 | return 1; | |
2193 | ||
2194 | /* otherwise we must be sure not to step on | |
2195 | * any metadata, so stay: | |
2196 | * 36K beyond start of superblock | |
2197 | * beyond end of badblocks | |
2198 | * beyond write-intent bitmap | |
2199 | */ | |
2200 | if (rdev->sb_start + (32+4)*2 > new_offset) | |
2201 | return 0; | |
2202 | bitmap = rdev->mddev->bitmap; | |
2203 | if (bitmap && !rdev->mddev->bitmap_info.file && | |
2204 | rdev->sb_start + rdev->mddev->bitmap_info.offset + | |
1ec885cd | 2205 | bitmap->storage.file_pages * (PAGE_SIZE>>9) > new_offset) |
c6563a8c N |
2206 | return 0; |
2207 | if (rdev->badblocks.sector + rdev->badblocks.size > new_offset) | |
2208 | return 0; | |
2209 | ||
2210 | return 1; | |
0cd17fec | 2211 | } |
1da177e4 | 2212 | |
75c96f85 | 2213 | static struct super_type super_types[] = { |
1da177e4 LT |
2214 | [0] = { |
2215 | .name = "0.90.0", | |
2216 | .owner = THIS_MODULE, | |
0cd17fec CW |
2217 | .load_super = super_90_load, |
2218 | .validate_super = super_90_validate, | |
2219 | .sync_super = super_90_sync, | |
2220 | .rdev_size_change = super_90_rdev_size_change, | |
c6563a8c | 2221 | .allow_new_offset = super_90_allow_new_offset, |
1da177e4 LT |
2222 | }, |
2223 | [1] = { | |
2224 | .name = "md-1", | |
2225 | .owner = THIS_MODULE, | |
0cd17fec CW |
2226 | .load_super = super_1_load, |
2227 | .validate_super = super_1_validate, | |
2228 | .sync_super = super_1_sync, | |
2229 | .rdev_size_change = super_1_rdev_size_change, | |
c6563a8c | 2230 | .allow_new_offset = super_1_allow_new_offset, |
1da177e4 LT |
2231 | }, |
2232 | }; | |
1da177e4 | 2233 | |
fd01b88c | 2234 | static void sync_super(struct mddev *mddev, struct md_rdev *rdev) |
076f968b JB |
2235 | { |
2236 | if (mddev->sync_super) { | |
2237 | mddev->sync_super(mddev, rdev); | |
2238 | return; | |
2239 | } | |
2240 | ||
2241 | BUG_ON(mddev->major_version >= ARRAY_SIZE(super_types)); | |
2242 | ||
2243 | super_types[mddev->major_version].sync_super(mddev, rdev); | |
2244 | } | |
2245 | ||
fd01b88c | 2246 | static int match_mddev_units(struct mddev *mddev1, struct mddev *mddev2) |
1da177e4 | 2247 | { |
3cb03002 | 2248 | struct md_rdev *rdev, *rdev2; |
1da177e4 | 2249 | |
4b80991c | 2250 | rcu_read_lock(); |
0b020e85 SL |
2251 | rdev_for_each_rcu(rdev, mddev1) { |
2252 | if (test_bit(Faulty, &rdev->flags) || | |
2253 | test_bit(Journal, &rdev->flags) || | |
2254 | rdev->raid_disk == -1) | |
2255 | continue; | |
2256 | rdev_for_each_rcu(rdev2, mddev2) { | |
2257 | if (test_bit(Faulty, &rdev2->flags) || | |
2258 | test_bit(Journal, &rdev2->flags) || | |
2259 | rdev2->raid_disk == -1) | |
2260 | continue; | |
61a27e1f | 2261 | if (rdev->bdev->bd_disk == rdev2->bdev->bd_disk) { |
4b80991c | 2262 | rcu_read_unlock(); |
7dd5e7c3 | 2263 | return 1; |
4b80991c | 2264 | } |
0b020e85 SL |
2265 | } |
2266 | } | |
4b80991c | 2267 | rcu_read_unlock(); |
1da177e4 LT |
2268 | return 0; |
2269 | } | |
2270 | ||
2271 | static LIST_HEAD(pending_raid_disks); | |
2272 | ||
ac5e7113 AN |
2273 | /* |
2274 | * Try to register data integrity profile for an mddev | |
2275 | * | |
2276 | * This is called when an array is started and after a disk has been kicked | |
2277 | * from the array. It only succeeds if all working and active component devices | |
2278 | * are integrity capable with matching profiles. | |
2279 | */ | |
fd01b88c | 2280 | int md_integrity_register(struct mddev *mddev) |
ac5e7113 | 2281 | { |
3cb03002 | 2282 | struct md_rdev *rdev, *reference = NULL; |
ac5e7113 AN |
2283 | |
2284 | if (list_empty(&mddev->disks)) | |
2285 | return 0; /* nothing to do */ | |
629acb6a JB |
2286 | if (!mddev->gendisk || blk_get_integrity(mddev->gendisk)) |
2287 | return 0; /* shouldn't register, or already is */ | |
dafb20fa | 2288 | rdev_for_each(rdev, mddev) { |
ac5e7113 AN |
2289 | /* skip spares and non-functional disks */ |
2290 | if (test_bit(Faulty, &rdev->flags)) | |
2291 | continue; | |
2292 | if (rdev->raid_disk < 0) | |
2293 | continue; | |
ac5e7113 AN |
2294 | if (!reference) { |
2295 | /* Use the first rdev as the reference */ | |
2296 | reference = rdev; | |
2297 | continue; | |
2298 | } | |
2299 | /* does this rdev's profile match the reference profile? */ | |
2300 | if (blk_integrity_compare(reference->bdev->bd_disk, | |
2301 | rdev->bdev->bd_disk) < 0) | |
2302 | return -EINVAL; | |
2303 | } | |
89078d57 MP |
2304 | if (!reference || !bdev_get_integrity(reference->bdev)) |
2305 | return 0; | |
ac5e7113 AN |
2306 | /* |
2307 | * All component devices are integrity capable and have matching | |
2308 | * profiles, register the common profile for the md device. | |
2309 | */ | |
25520d55 MP |
2310 | blk_integrity_register(mddev->gendisk, |
2311 | bdev_get_integrity(reference->bdev)); | |
2312 | ||
9d48739e | 2313 | pr_debug("md: data integrity enabled on %s\n", mdname(mddev)); |
10764815 | 2314 | if (bioset_integrity_create(&mddev->bio_set, BIO_POOL_SIZE) || |
daee2024 GJ |
2315 | (mddev->level != 1 && mddev->level != 10 && |
2316 | bioset_integrity_create(&mddev->io_acct_set, BIO_POOL_SIZE))) { | |
de3ea66e GJ |
2317 | /* |
2318 | * No need to handle the failure of bioset_integrity_create, | |
2319 | * because the function is called by md_run() -> pers->run(), | |
2320 | * md_run calls bioset_exit -> bioset_integrity_free in case | |
2321 | * of failure case. | |
2322 | */ | |
9d48739e | 2323 | pr_err("md: failed to create integrity pool for %s\n", |
a91a2785 MP |
2324 | mdname(mddev)); |
2325 | return -EINVAL; | |
2326 | } | |
ac5e7113 AN |
2327 | return 0; |
2328 | } | |
2329 | EXPORT_SYMBOL(md_integrity_register); | |
2330 | ||
1501efad DW |
2331 | /* |
2332 | * Attempt to add an rdev, but only if it is consistent with the current | |
2333 | * integrity profile | |
2334 | */ | |
2335 | int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev) | |
3f9d99c1 | 2336 | { |
2863b9eb JB |
2337 | struct blk_integrity *bi_mddev; |
2338 | ||
2339 | if (!mddev->gendisk) | |
1501efad | 2340 | return 0; |
2863b9eb | 2341 | |
2863b9eb | 2342 | bi_mddev = blk_get_integrity(mddev->gendisk); |
3f9d99c1 | 2343 | |
ac5e7113 | 2344 | if (!bi_mddev) /* nothing to do */ |
1501efad DW |
2345 | return 0; |
2346 | ||
2347 | if (blk_integrity_compare(mddev->gendisk, rdev->bdev->bd_disk) != 0) { | |
913cce5a CH |
2348 | pr_err("%s: incompatible integrity profile for %pg\n", |
2349 | mdname(mddev), rdev->bdev); | |
1501efad DW |
2350 | return -ENXIO; |
2351 | } | |
2352 | ||
2353 | return 0; | |
3f9d99c1 | 2354 | } |
ac5e7113 | 2355 | EXPORT_SYMBOL(md_integrity_add_rdev); |
3f9d99c1 | 2356 | |
d7a47838 CH |
2357 | static bool rdev_read_only(struct md_rdev *rdev) |
2358 | { | |
2359 | return bdev_read_only(rdev->bdev) || | |
2360 | (rdev->meta_bdev && bdev_read_only(rdev->meta_bdev)); | |
2361 | } | |
2362 | ||
f72ffdd6 | 2363 | static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) |
1da177e4 | 2364 | { |
7dd5e7c3 | 2365 | char b[BDEVNAME_SIZE]; |
5e55e2f5 | 2366 | int err; |
1da177e4 | 2367 | |
11e2ede0 DW |
2368 | /* prevent duplicates */ |
2369 | if (find_rdev(mddev, rdev->bdev->bd_dev)) | |
2370 | return -EEXIST; | |
2371 | ||
d7a47838 | 2372 | if (rdev_read_only(rdev) && mddev->pers) |
97b20ef7 N |
2373 | return -EROFS; |
2374 | ||
dd8ac336 | 2375 | /* make sure rdev->sectors exceeds mddev->dev_sectors */ |
f6b6ec5c SL |
2376 | if (!test_bit(Journal, &rdev->flags) && |
2377 | rdev->sectors && | |
2378 | (mddev->dev_sectors == 0 || rdev->sectors < mddev->dev_sectors)) { | |
a778b73f N |
2379 | if (mddev->pers) { |
2380 | /* Cannot change size, so fail | |
2381 | * If mddev->level <= 0, then we don't care | |
2382 | * about aligning sizes (e.g. linear) | |
2383 | */ | |
2384 | if (mddev->level > 0) | |
2385 | return -ENOSPC; | |
2386 | } else | |
dd8ac336 | 2387 | mddev->dev_sectors = rdev->sectors; |
2bf071bf | 2388 | } |
1da177e4 LT |
2389 | |
2390 | /* Verify rdev->desc_nr is unique. | |
2391 | * If it is -1, assign a free number, else | |
2392 | * check number is not in use | |
2393 | */ | |
4878e9eb | 2394 | rcu_read_lock(); |
1da177e4 LT |
2395 | if (rdev->desc_nr < 0) { |
2396 | int choice = 0; | |
4878e9eb N |
2397 | if (mddev->pers) |
2398 | choice = mddev->raid_disks; | |
57d051dc | 2399 | while (md_find_rdev_nr_rcu(mddev, choice)) |
1da177e4 LT |
2400 | choice++; |
2401 | rdev->desc_nr = choice; | |
2402 | } else { | |
57d051dc | 2403 | if (md_find_rdev_nr_rcu(mddev, rdev->desc_nr)) { |
4878e9eb | 2404 | rcu_read_unlock(); |
1da177e4 | 2405 | return -EBUSY; |
4878e9eb | 2406 | } |
1da177e4 | 2407 | } |
4878e9eb | 2408 | rcu_read_unlock(); |
f6b6ec5c SL |
2409 | if (!test_bit(Journal, &rdev->flags) && |
2410 | mddev->max_disks && rdev->desc_nr >= mddev->max_disks) { | |
9d48739e N |
2411 | pr_warn("md: %s: array is limited to %d devices\n", |
2412 | mdname(mddev), mddev->max_disks); | |
de01dfad N |
2413 | return -EBUSY; |
2414 | } | |
900d156b | 2415 | snprintf(b, sizeof(b), "%pg", rdev->bdev); |
90a9befb | 2416 | strreplace(b, '/', '!'); |
649316b2 | 2417 | |
1da177e4 | 2418 | rdev->mddev = mddev; |
9d48739e | 2419 | pr_debug("md: bind<%s>\n", b); |
86e6ffdd | 2420 | |
963c555e | 2421 | if (mddev->raid_disks) |
404659cf | 2422 | mddev_create_serial_pool(mddev, rdev, false); |
963c555e | 2423 | |
b2d6db58 | 2424 | if ((err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b))) |
5e55e2f5 | 2425 | goto fail; |
86e6ffdd | 2426 | |
5e3b8a8d | 2427 | /* failure here is OK */ |
8d65269f | 2428 | err = sysfs_create_link(&rdev->kobj, bdev_kobj(rdev->bdev), "block"); |
00bcb4ac | 2429 | rdev->sysfs_state = sysfs_get_dirent_safe(rdev->kobj.sd, "state"); |
e1a86dbb JB |
2430 | rdev->sysfs_unack_badblocks = |
2431 | sysfs_get_dirent_safe(rdev->kobj.sd, "unacknowledged_bad_blocks"); | |
2432 | rdev->sysfs_badblocks = | |
2433 | sysfs_get_dirent_safe(rdev->kobj.sd, "bad_blocks"); | |
3c0ee63a | 2434 | |
4b80991c | 2435 | list_add_rcu(&rdev->same_set, &mddev->disks); |
e09b457b | 2436 | bd_link_disk_holder(rdev->bdev, mddev->gendisk); |
4044ba58 N |
2437 | |
2438 | /* May as well allow recovery to be retried once */ | |
5389042f | 2439 | mddev->recovery_disabled++; |
3f9d99c1 | 2440 | |
1da177e4 | 2441 | return 0; |
5e55e2f5 N |
2442 | |
2443 | fail: | |
9d48739e N |
2444 | pr_warn("md: failed to register dev-%s for %s\n", |
2445 | b, mdname(mddev)); | |
5e55e2f5 | 2446 | return err; |
1da177e4 LT |
2447 | } |
2448 | ||
cc1ffe61 | 2449 | static void rdev_delayed_delete(struct work_struct *ws) |
5792a285 | 2450 | { |
3cb03002 | 2451 | struct md_rdev *rdev = container_of(ws, struct md_rdev, del_work); |
5792a285 | 2452 | kobject_del(&rdev->kobj); |
177a99b2 | 2453 | kobject_put(&rdev->kobj); |
5792a285 N |
2454 | } |
2455 | ||
f72ffdd6 | 2456 | static void unbind_rdev_from_array(struct md_rdev *rdev) |
1da177e4 | 2457 | { |
49731baa | 2458 | bd_unlink_disk_holder(rdev->bdev, rdev->mddev->gendisk); |
4b80991c | 2459 | list_del_rcu(&rdev->same_set); |
913cce5a | 2460 | pr_debug("md: unbind<%pg>\n", rdev->bdev); |
11d3a9f6 | 2461 | mddev_destroy_serial_pool(rdev->mddev, rdev, false); |
1da177e4 | 2462 | rdev->mddev = NULL; |
86e6ffdd | 2463 | sysfs_remove_link(&rdev->kobj, "block"); |
3c0ee63a | 2464 | sysfs_put(rdev->sysfs_state); |
e1a86dbb JB |
2465 | sysfs_put(rdev->sysfs_unack_badblocks); |
2466 | sysfs_put(rdev->sysfs_badblocks); | |
3c0ee63a | 2467 | rdev->sysfs_state = NULL; |
e1a86dbb JB |
2468 | rdev->sysfs_unack_badblocks = NULL; |
2469 | rdev->sysfs_badblocks = NULL; | |
2230dfe4 | 2470 | rdev->badblocks.count = 0; |
5792a285 | 2471 | /* We need to delay this, otherwise we can deadlock when |
4b80991c N |
2472 | * writing to 'remove' to "dev/state". We also need |
2473 | * to delay it due to rcu usage. | |
5792a285 | 2474 | */ |
4b80991c | 2475 | synchronize_rcu(); |
cc1ffe61 | 2476 | INIT_WORK(&rdev->del_work, rdev_delayed_delete); |
177a99b2 | 2477 | kobject_get(&rdev->kobj); |
cc1ffe61 | 2478 | queue_work(md_rdev_misc_wq, &rdev->del_work); |
1da177e4 LT |
2479 | } |
2480 | ||
2481 | /* | |
2482 | * prevent the device from being mounted, repartitioned or | |
2483 | * otherwise reused by a RAID array (or any other kernel | |
2484 | * subsystem), by bd_claiming the device. | |
2485 | */ | |
3cb03002 | 2486 | static int lock_rdev(struct md_rdev *rdev, dev_t dev, int shared) |
1da177e4 LT |
2487 | { |
2488 | int err = 0; | |
2489 | struct block_device *bdev; | |
1da177e4 | 2490 | |
d4d77629 | 2491 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, |
3cb03002 | 2492 | shared ? (struct md_rdev *)lock_rdev : rdev); |
1da177e4 | 2493 | if (IS_ERR(bdev)) { |
ea3edd4d CH |
2494 | pr_warn("md: could not open device unknown-block(%u,%u).\n", |
2495 | MAJOR(dev), MINOR(dev)); | |
1da177e4 LT |
2496 | return PTR_ERR(bdev); |
2497 | } | |
1da177e4 LT |
2498 | rdev->bdev = bdev; |
2499 | return err; | |
2500 | } | |
2501 | ||
3cb03002 | 2502 | static void unlock_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2503 | { |
2504 | struct block_device *bdev = rdev->bdev; | |
2505 | rdev->bdev = NULL; | |
e525fd89 | 2506 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
1da177e4 LT |
2507 | } |
2508 | ||
2509 | void md_autodetect_dev(dev_t dev); | |
2510 | ||
f72ffdd6 | 2511 | static void export_rdev(struct md_rdev *rdev) |
1da177e4 | 2512 | { |
913cce5a | 2513 | pr_debug("md: export_rdev(%pg)\n", rdev->bdev); |
545c8795 | 2514 | md_rdev_clear(rdev); |
1da177e4 | 2515 | #ifndef MODULE |
d0fae18f N |
2516 | if (test_bit(AutoDetected, &rdev->flags)) |
2517 | md_autodetect_dev(rdev->bdev->bd_dev); | |
1da177e4 LT |
2518 | #endif |
2519 | unlock_rdev(rdev); | |
86e6ffdd | 2520 | kobject_put(&rdev->kobj); |
1da177e4 LT |
2521 | } |
2522 | ||
fb56dfef | 2523 | void md_kick_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2524 | { |
2525 | unbind_rdev_from_array(rdev); | |
2526 | export_rdev(rdev); | |
2527 | } | |
fb56dfef | 2528 | EXPORT_SYMBOL_GPL(md_kick_rdev_from_array); |
1da177e4 | 2529 | |
fd01b88c | 2530 | static void export_array(struct mddev *mddev) |
1da177e4 | 2531 | { |
0638bb0e | 2532 | struct md_rdev *rdev; |
1da177e4 | 2533 | |
0638bb0e N |
2534 | while (!list_empty(&mddev->disks)) { |
2535 | rdev = list_first_entry(&mddev->disks, struct md_rdev, | |
2536 | same_set); | |
fb56dfef | 2537 | md_kick_rdev_from_array(rdev); |
1da177e4 | 2538 | } |
1da177e4 LT |
2539 | mddev->raid_disks = 0; |
2540 | mddev->major_version = 0; | |
2541 | } | |
2542 | ||
6497709b N |
2543 | static bool set_in_sync(struct mddev *mddev) |
2544 | { | |
efa4b77b | 2545 | lockdep_assert_held(&mddev->lock); |
4ad23a97 N |
2546 | if (!mddev->in_sync) { |
2547 | mddev->sync_checkers++; | |
2548 | spin_unlock(&mddev->lock); | |
2549 | percpu_ref_switch_to_atomic_sync(&mddev->writes_pending); | |
2550 | spin_lock(&mddev->lock); | |
2551 | if (!mddev->in_sync && | |
2552 | percpu_ref_is_zero(&mddev->writes_pending)) { | |
6497709b | 2553 | mddev->in_sync = 1; |
4ad23a97 N |
2554 | /* |
2555 | * Ensure ->in_sync is visible before we clear | |
2556 | * ->sync_checkers. | |
2557 | */ | |
55cc39f3 | 2558 | smp_mb(); |
6497709b N |
2559 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2560 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
2561 | } | |
4ad23a97 N |
2562 | if (--mddev->sync_checkers == 0) |
2563 | percpu_ref_switch_to_percpu(&mddev->writes_pending); | |
6497709b N |
2564 | } |
2565 | if (mddev->safemode == 1) | |
2566 | mddev->safemode = 0; | |
2567 | return mddev->in_sync; | |
2568 | } | |
2569 | ||
f72ffdd6 | 2570 | static void sync_sbs(struct mddev *mddev, int nospares) |
1da177e4 | 2571 | { |
42543769 N |
2572 | /* Update each superblock (in-memory image), but |
2573 | * if we are allowed to, skip spares which already | |
2574 | * have the right event counter, or have one earlier | |
2575 | * (which would mean they aren't being marked as dirty | |
2576 | * with the rest of the array) | |
2577 | */ | |
3cb03002 | 2578 | struct md_rdev *rdev; |
dafb20fa | 2579 | rdev_for_each(rdev, mddev) { |
42543769 N |
2580 | if (rdev->sb_events == mddev->events || |
2581 | (nospares && | |
2582 | rdev->raid_disk < 0 && | |
42543769 N |
2583 | rdev->sb_events+1 == mddev->events)) { |
2584 | /* Don't update this superblock */ | |
2585 | rdev->sb_loaded = 2; | |
2586 | } else { | |
076f968b | 2587 | sync_super(mddev, rdev); |
42543769 N |
2588 | rdev->sb_loaded = 1; |
2589 | } | |
1da177e4 LT |
2590 | } |
2591 | } | |
2592 | ||
2aa82191 GR |
2593 | static bool does_sb_need_changing(struct mddev *mddev) |
2594 | { | |
fc873834 | 2595 | struct md_rdev *rdev = NULL, *iter; |
2aa82191 GR |
2596 | struct mdp_superblock_1 *sb; |
2597 | int role; | |
2598 | ||
2599 | /* Find a good rdev */ | |
fc873834 XT |
2600 | rdev_for_each(iter, mddev) |
2601 | if ((iter->raid_disk >= 0) && !test_bit(Faulty, &iter->flags)) { | |
2602 | rdev = iter; | |
2aa82191 | 2603 | break; |
fc873834 | 2604 | } |
2aa82191 GR |
2605 | |
2606 | /* No good device found. */ | |
2607 | if (!rdev) | |
2608 | return false; | |
2609 | ||
2610 | sb = page_address(rdev->sb_page); | |
2611 | /* Check if a device has become faulty or a spare become active */ | |
2612 | rdev_for_each(rdev, mddev) { | |
2613 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
2614 | /* Device activated? */ | |
9151ad5d | 2615 | if (role == MD_DISK_ROLE_SPARE && rdev->raid_disk >= 0 && |
2aa82191 GR |
2616 | !test_bit(Faulty, &rdev->flags)) |
2617 | return true; | |
2618 | /* Device turned faulty? */ | |
9151ad5d | 2619 | if (test_bit(Faulty, &rdev->flags) && (role < MD_DISK_ROLE_MAX)) |
2aa82191 GR |
2620 | return true; |
2621 | } | |
2622 | ||
2623 | /* Check if any mddev parameters have changed */ | |
2624 | if ((mddev->dev_sectors != le64_to_cpu(sb->size)) || | |
2625 | (mddev->reshape_position != le64_to_cpu(sb->reshape_position)) || | |
13459213 | 2626 | (mddev->layout != le32_to_cpu(sb->layout)) || |
2aa82191 GR |
2627 | (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) || |
2628 | (mddev->chunk_sectors != le32_to_cpu(sb->chunksize))) | |
2629 | return true; | |
2630 | ||
2631 | return false; | |
2632 | } | |
2633 | ||
1aee41f6 | 2634 | void md_update_sb(struct mddev *mddev, int force_change) |
1da177e4 | 2635 | { |
3cb03002 | 2636 | struct md_rdev *rdev; |
06d91a5f | 2637 | int sync_req; |
42543769 | 2638 | int nospares = 0; |
2699b672 | 2639 | int any_badblocks_changed = 0; |
23b63f9f | 2640 | int ret = -1; |
1da177e4 | 2641 | |
d87f064f N |
2642 | if (mddev->ro) { |
2643 | if (force_change) | |
2953079c | 2644 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
d87f064f N |
2645 | return; |
2646 | } | |
2aa82191 | 2647 | |
2c97cf13 | 2648 | repeat: |
2aa82191 | 2649 | if (mddev_is_clustered(mddev)) { |
2953079c | 2650 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
2aa82191 | 2651 | force_change = 1; |
2953079c | 2652 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
85ad1d13 | 2653 | nospares = 1; |
23b63f9f | 2654 | ret = md_cluster_ops->metadata_update_start(mddev); |
2aa82191 GR |
2655 | /* Has someone else has updated the sb */ |
2656 | if (!does_sb_need_changing(mddev)) { | |
23b63f9f GJ |
2657 | if (ret == 0) |
2658 | md_cluster_ops->metadata_update_cancel(mddev); | |
2953079c SL |
2659 | bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2660 | BIT(MD_SB_CHANGE_DEVS) | | |
2661 | BIT(MD_SB_CHANGE_CLEAN)); | |
2aa82191 GR |
2662 | return; |
2663 | } | |
2664 | } | |
2c97cf13 | 2665 | |
db0505d3 N |
2666 | /* |
2667 | * First make sure individual recovery_offsets are correct | |
2668 | * curr_resync_completed can only be used during recovery. | |
2669 | * During reshape/resync it might use array-addresses rather | |
2670 | * that device addresses. | |
2671 | */ | |
dafb20fa | 2672 | rdev_for_each(rdev, mddev) { |
3a3a5ddb N |
2673 | if (rdev->raid_disk >= 0 && |
2674 | mddev->delta_disks >= 0 && | |
db0505d3 N |
2675 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
2676 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery) && | |
2677 | !test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
f2076e7d | 2678 | !test_bit(Journal, &rdev->flags) && |
3a3a5ddb N |
2679 | !test_bit(In_sync, &rdev->flags) && |
2680 | mddev->curr_resync_completed > rdev->recovery_offset) | |
2681 | rdev->recovery_offset = mddev->curr_resync_completed; | |
2682 | ||
f72ffdd6 | 2683 | } |
bd52b746 | 2684 | if (!mddev->persistent) { |
2953079c SL |
2685 | clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2686 | clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
de393cde | 2687 | if (!mddev->external) { |
2953079c | 2688 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
dafb20fa | 2689 | rdev_for_each(rdev, mddev) { |
de393cde | 2690 | if (rdev->badblocks.changed) { |
d0962936 | 2691 | rdev->badblocks.changed = 0; |
fc974ee2 | 2692 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2693 | md_error(mddev, rdev); |
2694 | } | |
2695 | clear_bit(Blocked, &rdev->flags); | |
2696 | clear_bit(BlockedBadBlocks, &rdev->flags); | |
2697 | wake_up(&rdev->blocked_wait); | |
2698 | } | |
2699 | } | |
3a3a5ddb N |
2700 | wake_up(&mddev->sb_wait); |
2701 | return; | |
2702 | } | |
2703 | ||
85572d7c | 2704 | spin_lock(&mddev->lock); |
84692195 | 2705 | |
9ebc6ef1 | 2706 | mddev->utime = ktime_get_real_seconds(); |
3a3a5ddb | 2707 | |
2953079c | 2708 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
850b2b42 | 2709 | force_change = 1; |
2953079c | 2710 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
850b2b42 N |
2711 | /* just a clean<-> dirty transition, possibly leave spares alone, |
2712 | * though if events isn't the right even/odd, we will have to do | |
2713 | * spares after all | |
2714 | */ | |
2715 | nospares = 1; | |
2716 | if (force_change) | |
2717 | nospares = 0; | |
2718 | if (mddev->degraded) | |
84692195 N |
2719 | /* If the array is degraded, then skipping spares is both |
2720 | * dangerous and fairly pointless. | |
2721 | * Dangerous because a device that was removed from the array | |
2722 | * might have a event_count that still looks up-to-date, | |
2723 | * so it can be re-added without a resync. | |
2724 | * Pointless because if there are any spares to skip, | |
2725 | * then a recovery will happen and soon that array won't | |
2726 | * be degraded any more and the spare can go back to sleep then. | |
2727 | */ | |
850b2b42 | 2728 | nospares = 0; |
84692195 | 2729 | |
06d91a5f | 2730 | sync_req = mddev->in_sync; |
42543769 N |
2731 | |
2732 | /* If this is just a dirty<->clean transition, and the array is clean | |
2733 | * and 'events' is odd, we can roll back to the previous clean state */ | |
850b2b42 | 2734 | if (nospares |
42543769 | 2735 | && (mddev->in_sync && mddev->recovery_cp == MaxSector) |
a8707c08 N |
2736 | && mddev->can_decrease_events |
2737 | && mddev->events != 1) { | |
42543769 | 2738 | mddev->events--; |
a8707c08 N |
2739 | mddev->can_decrease_events = 0; |
2740 | } else { | |
42543769 N |
2741 | /* otherwise we have to go forward and ... */ |
2742 | mddev->events ++; | |
a8707c08 | 2743 | mddev->can_decrease_events = nospares; |
42543769 | 2744 | } |
1da177e4 | 2745 | |
403df478 N |
2746 | /* |
2747 | * This 64-bit counter should never wrap. | |
2748 | * Either we are in around ~1 trillion A.C., assuming | |
2749 | * 1 reboot per second, or we have a bug... | |
2750 | */ | |
2751 | WARN_ON(mddev->events == 0); | |
2699b672 | 2752 | |
dafb20fa | 2753 | rdev_for_each(rdev, mddev) { |
2699b672 N |
2754 | if (rdev->badblocks.changed) |
2755 | any_badblocks_changed++; | |
de393cde N |
2756 | if (test_bit(Faulty, &rdev->flags)) |
2757 | set_bit(FaultRecorded, &rdev->flags); | |
2758 | } | |
2699b672 | 2759 | |
e691063a | 2760 | sync_sbs(mddev, nospares); |
85572d7c | 2761 | spin_unlock(&mddev->lock); |
1da177e4 | 2762 | |
36a4e1fe N |
2763 | pr_debug("md: updating %s RAID superblock on device (in sync %d)\n", |
2764 | mdname(mddev), mddev->in_sync); | |
1da177e4 | 2765 | |
504634f6 SL |
2766 | if (mddev->queue) |
2767 | blk_add_trace_msg(mddev->queue, "md md_update_sb"); | |
46533ff7 | 2768 | rewrite: |
e64e4018 | 2769 | md_bitmap_update_sb(mddev->bitmap); |
dafb20fa | 2770 | rdev_for_each(rdev, mddev) { |
42543769 N |
2771 | if (rdev->sb_loaded != 1) |
2772 | continue; /* no noise on spare devices */ | |
1da177e4 | 2773 | |
f466722c | 2774 | if (!test_bit(Faulty, &rdev->flags)) { |
7bfa19f2 | 2775 | md_super_write(mddev,rdev, |
0f420358 | 2776 | rdev->sb_start, rdev->sb_size, |
7bfa19f2 | 2777 | rdev->sb_page); |
913cce5a CH |
2778 | pr_debug("md: (write) %pg's sb offset: %llu\n", |
2779 | rdev->bdev, | |
36a4e1fe | 2780 | (unsigned long long)rdev->sb_start); |
42543769 | 2781 | rdev->sb_events = mddev->events; |
2699b672 N |
2782 | if (rdev->badblocks.size) { |
2783 | md_super_write(mddev, rdev, | |
2784 | rdev->badblocks.sector, | |
2785 | rdev->badblocks.size << 9, | |
2786 | rdev->bb_page); | |
2787 | rdev->badblocks.size = 0; | |
2788 | } | |
7bfa19f2 | 2789 | |
f466722c | 2790 | } else |
913cce5a CH |
2791 | pr_debug("md: %pg (skipping faulty)\n", |
2792 | rdev->bdev); | |
d70ed2e4 | 2793 | |
7bfa19f2 | 2794 | if (mddev->level == LEVEL_MULTIPATH) |
1da177e4 LT |
2795 | /* only need to write one superblock... */ |
2796 | break; | |
2797 | } | |
46533ff7 N |
2798 | if (md_super_wait(mddev) < 0) |
2799 | goto rewrite; | |
2953079c | 2800 | /* if there was a failure, MD_SB_CHANGE_DEVS was set, and we re-write super */ |
7bfa19f2 | 2801 | |
2c97cf13 GJ |
2802 | if (mddev_is_clustered(mddev) && ret == 0) |
2803 | md_cluster_ops->metadata_update_finish(mddev); | |
2804 | ||
850b2b42 | 2805 | if (mddev->in_sync != sync_req || |
2953079c SL |
2806 | !bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2807 | BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_CLEAN))) | |
06d91a5f | 2808 | /* have to write it out again */ |
06d91a5f | 2809 | goto repeat; |
3d310eb7 | 2810 | wake_up(&mddev->sb_wait); |
acb180b0 | 2811 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
e1a86dbb | 2812 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
06d91a5f | 2813 | |
dafb20fa | 2814 | rdev_for_each(rdev, mddev) { |
de393cde N |
2815 | if (test_and_clear_bit(FaultRecorded, &rdev->flags)) |
2816 | clear_bit(Blocked, &rdev->flags); | |
2817 | ||
2818 | if (any_badblocks_changed) | |
fc974ee2 | 2819 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2820 | clear_bit(BlockedBadBlocks, &rdev->flags); |
2821 | wake_up(&rdev->blocked_wait); | |
2822 | } | |
1da177e4 | 2823 | } |
1aee41f6 | 2824 | EXPORT_SYMBOL(md_update_sb); |
1da177e4 | 2825 | |
a6da4ef8 GR |
2826 | static int add_bound_rdev(struct md_rdev *rdev) |
2827 | { | |
2828 | struct mddev *mddev = rdev->mddev; | |
2829 | int err = 0; | |
87d4d916 | 2830 | bool add_journal = test_bit(Journal, &rdev->flags); |
a6da4ef8 | 2831 | |
87d4d916 | 2832 | if (!mddev->pers->hot_remove_disk || add_journal) { |
a6da4ef8 GR |
2833 | /* If there is hot_add_disk but no hot_remove_disk |
2834 | * then added disks for geometry changes, | |
2835 | * and should be added immediately. | |
2836 | */ | |
2837 | super_types[mddev->major_version]. | |
2838 | validate_super(mddev, rdev); | |
87d4d916 SL |
2839 | if (add_journal) |
2840 | mddev_suspend(mddev); | |
a6da4ef8 | 2841 | err = mddev->pers->hot_add_disk(mddev, rdev); |
87d4d916 SL |
2842 | if (add_journal) |
2843 | mddev_resume(mddev); | |
a6da4ef8 | 2844 | if (err) { |
db767672 | 2845 | md_kick_rdev_from_array(rdev); |
a6da4ef8 GR |
2846 | return err; |
2847 | } | |
2848 | } | |
2849 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2850 | ||
2953079c | 2851 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a6da4ef8 GR |
2852 | if (mddev->degraded) |
2853 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
2854 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
54679486 | 2855 | md_new_event(); |
a6da4ef8 GR |
2856 | md_wakeup_thread(mddev->thread); |
2857 | return 0; | |
2858 | } | |
1da177e4 | 2859 | |
7f6ce769 | 2860 | /* words written to sysfs files may, or may not, be \n terminated. |
bce74dac N |
2861 | * We want to accept with case. For this we use cmd_match. |
2862 | */ | |
2863 | static int cmd_match(const char *cmd, const char *str) | |
2864 | { | |
2865 | /* See if cmd, written into a sysfs file, matches | |
2866 | * str. They must either be the same, or cmd can | |
2867 | * have a trailing newline | |
2868 | */ | |
2869 | while (*cmd && *str && *cmd == *str) { | |
2870 | cmd++; | |
2871 | str++; | |
2872 | } | |
2873 | if (*cmd == '\n') | |
2874 | cmd++; | |
2875 | if (*str || *cmd) | |
2876 | return 0; | |
2877 | return 1; | |
2878 | } | |
2879 | ||
86e6ffdd N |
2880 | struct rdev_sysfs_entry { |
2881 | struct attribute attr; | |
3cb03002 N |
2882 | ssize_t (*show)(struct md_rdev *, char *); |
2883 | ssize_t (*store)(struct md_rdev *, const char *, size_t); | |
86e6ffdd N |
2884 | }; |
2885 | ||
2886 | static ssize_t | |
3cb03002 | 2887 | state_show(struct md_rdev *rdev, char *page) |
86e6ffdd | 2888 | { |
35b785f7 | 2889 | char *sep = ","; |
20a49ff6 | 2890 | size_t len = 0; |
6aa7de05 | 2891 | unsigned long flags = READ_ONCE(rdev->flags); |
86e6ffdd | 2892 | |
758bfc8a | 2893 | if (test_bit(Faulty, &flags) || |
dcbcb486 TM |
2894 | (!test_bit(ExternalBbl, &flags) && |
2895 | rdev->badblocks.unacked_exist)) | |
35b785f7 TM |
2896 | len += sprintf(page+len, "faulty%s", sep); |
2897 | if (test_bit(In_sync, &flags)) | |
2898 | len += sprintf(page+len, "in_sync%s", sep); | |
2899 | if (test_bit(Journal, &flags)) | |
2900 | len += sprintf(page+len, "journal%s", sep); | |
2901 | if (test_bit(WriteMostly, &flags)) | |
2902 | len += sprintf(page+len, "write_mostly%s", sep); | |
758bfc8a | 2903 | if (test_bit(Blocked, &flags) || |
52c64152 | 2904 | (rdev->badblocks.unacked_exist |
35b785f7 TM |
2905 | && !test_bit(Faulty, &flags))) |
2906 | len += sprintf(page+len, "blocked%s", sep); | |
758bfc8a | 2907 | if (!test_bit(Faulty, &flags) && |
f2076e7d | 2908 | !test_bit(Journal, &flags) && |
35b785f7 TM |
2909 | !test_bit(In_sync, &flags)) |
2910 | len += sprintf(page+len, "spare%s", sep); | |
2911 | if (test_bit(WriteErrorSeen, &flags)) | |
2912 | len += sprintf(page+len, "write_error%s", sep); | |
2913 | if (test_bit(WantReplacement, &flags)) | |
2914 | len += sprintf(page+len, "want_replacement%s", sep); | |
2915 | if (test_bit(Replacement, &flags)) | |
2916 | len += sprintf(page+len, "replacement%s", sep); | |
2917 | if (test_bit(ExternalBbl, &flags)) | |
2918 | len += sprintf(page+len, "external_bbl%s", sep); | |
688834e6 N |
2919 | if (test_bit(FailFast, &flags)) |
2920 | len += sprintf(page+len, "failfast%s", sep); | |
35b785f7 TM |
2921 | |
2922 | if (len) | |
2923 | len -= strlen(sep); | |
2d78f8c4 | 2924 | |
86e6ffdd N |
2925 | return len+sprintf(page+len, "\n"); |
2926 | } | |
2927 | ||
45dc2de1 | 2928 | static ssize_t |
3cb03002 | 2929 | state_store(struct md_rdev *rdev, const char *buf, size_t len) |
45dc2de1 N |
2930 | { |
2931 | /* can write | |
de393cde | 2932 | * faulty - simulates an error |
45dc2de1 | 2933 | * remove - disconnects the device |
f655675b N |
2934 | * writemostly - sets write_mostly |
2935 | * -writemostly - clears write_mostly | |
de393cde N |
2936 | * blocked - sets the Blocked flags |
2937 | * -blocked - clears the Blocked and possibly simulates an error | |
6d56e278 | 2938 | * insync - sets Insync providing device isn't active |
f466722c N |
2939 | * -insync - clear Insync for a device with a slot assigned, |
2940 | * so that it gets rebuilt based on bitmap | |
d7a9d443 N |
2941 | * write_error - sets WriteErrorSeen |
2942 | * -write_error - clears WriteErrorSeen | |
688834e6 | 2943 | * {,-}failfast - set/clear FailFast |
45dc2de1 | 2944 | */ |
8b9e2291 XN |
2945 | |
2946 | struct mddev *mddev = rdev->mddev; | |
45dc2de1 | 2947 | int err = -EINVAL; |
8b9e2291 XN |
2948 | bool need_update_sb = false; |
2949 | ||
45dc2de1 N |
2950 | if (cmd_match(buf, "faulty") && rdev->mddev->pers) { |
2951 | md_error(rdev->mddev, rdev); | |
9631abdb MT |
2952 | |
2953 | if (test_bit(MD_BROKEN, &rdev->mddev->flags)) | |
5ef56c8f | 2954 | err = -EBUSY; |
9631abdb MT |
2955 | else |
2956 | err = 0; | |
45dc2de1 | 2957 | } else if (cmd_match(buf, "remove")) { |
5d881783 SL |
2958 | if (rdev->mddev->pers) { |
2959 | clear_bit(Blocked, &rdev->flags); | |
2960 | remove_and_add_spares(rdev->mddev, rdev); | |
2961 | } | |
45dc2de1 N |
2962 | if (rdev->raid_disk >= 0) |
2963 | err = -EBUSY; | |
2964 | else { | |
45dc2de1 | 2965 | err = 0; |
a9720903 GJ |
2966 | if (mddev_is_clustered(mddev)) |
2967 | err = md_cluster_ops->remove_disk(mddev, rdev); | |
2968 | ||
2969 | if (err == 0) { | |
2970 | md_kick_rdev_from_array(rdev); | |
060b0689 | 2971 | if (mddev->pers) { |
2953079c | 2972 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
2973 | md_wakeup_thread(mddev->thread); |
2974 | } | |
54679486 | 2975 | md_new_event(); |
a9720903 | 2976 | } |
45dc2de1 | 2977 | } |
f655675b N |
2978 | } else if (cmd_match(buf, "writemostly")) { |
2979 | set_bit(WriteMostly, &rdev->flags); | |
404659cf | 2980 | mddev_create_serial_pool(rdev->mddev, rdev, false); |
8b9e2291 | 2981 | need_update_sb = true; |
f655675b N |
2982 | err = 0; |
2983 | } else if (cmd_match(buf, "-writemostly")) { | |
11d3a9f6 | 2984 | mddev_destroy_serial_pool(rdev->mddev, rdev, false); |
f655675b | 2985 | clear_bit(WriteMostly, &rdev->flags); |
8b9e2291 | 2986 | need_update_sb = true; |
6bfe0b49 DW |
2987 | err = 0; |
2988 | } else if (cmd_match(buf, "blocked")) { | |
2989 | set_bit(Blocked, &rdev->flags); | |
2990 | err = 0; | |
2991 | } else if (cmd_match(buf, "-blocked")) { | |
de393cde | 2992 | if (!test_bit(Faulty, &rdev->flags) && |
dcbcb486 | 2993 | !test_bit(ExternalBbl, &rdev->flags) && |
7da64a0a | 2994 | rdev->badblocks.unacked_exist) { |
de393cde N |
2995 | /* metadata handler doesn't understand badblocks, |
2996 | * so we need to fail the device | |
2997 | */ | |
2998 | md_error(rdev->mddev, rdev); | |
2999 | } | |
6bfe0b49 | 3000 | clear_bit(Blocked, &rdev->flags); |
de393cde | 3001 | clear_bit(BlockedBadBlocks, &rdev->flags); |
6bfe0b49 DW |
3002 | wake_up(&rdev->blocked_wait); |
3003 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
3004 | md_wakeup_thread(rdev->mddev->thread); | |
3005 | ||
6d56e278 N |
3006 | err = 0; |
3007 | } else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) { | |
3008 | set_bit(In_sync, &rdev->flags); | |
f655675b | 3009 | err = 0; |
688834e6 N |
3010 | } else if (cmd_match(buf, "failfast")) { |
3011 | set_bit(FailFast, &rdev->flags); | |
8b9e2291 | 3012 | need_update_sb = true; |
688834e6 N |
3013 | err = 0; |
3014 | } else if (cmd_match(buf, "-failfast")) { | |
3015 | clear_bit(FailFast, &rdev->flags); | |
8b9e2291 | 3016 | need_update_sb = true; |
688834e6 | 3017 | err = 0; |
f2076e7d SL |
3018 | } else if (cmd_match(buf, "-insync") && rdev->raid_disk >= 0 && |
3019 | !test_bit(Journal, &rdev->flags)) { | |
e1960f8c N |
3020 | if (rdev->mddev->pers == NULL) { |
3021 | clear_bit(In_sync, &rdev->flags); | |
3022 | rdev->saved_raid_disk = rdev->raid_disk; | |
3023 | rdev->raid_disk = -1; | |
3024 | err = 0; | |
3025 | } | |
d7a9d443 N |
3026 | } else if (cmd_match(buf, "write_error")) { |
3027 | set_bit(WriteErrorSeen, &rdev->flags); | |
3028 | err = 0; | |
3029 | } else if (cmd_match(buf, "-write_error")) { | |
3030 | clear_bit(WriteErrorSeen, &rdev->flags); | |
3031 | err = 0; | |
2d78f8c4 N |
3032 | } else if (cmd_match(buf, "want_replacement")) { |
3033 | /* Any non-spare device that is not a replacement can | |
3034 | * become want_replacement at any time, but we then need to | |
3035 | * check if recovery is needed. | |
3036 | */ | |
3037 | if (rdev->raid_disk >= 0 && | |
f2076e7d | 3038 | !test_bit(Journal, &rdev->flags) && |
2d78f8c4 N |
3039 | !test_bit(Replacement, &rdev->flags)) |
3040 | set_bit(WantReplacement, &rdev->flags); | |
3041 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
3042 | md_wakeup_thread(rdev->mddev->thread); | |
3043 | err = 0; | |
3044 | } else if (cmd_match(buf, "-want_replacement")) { | |
3045 | /* Clearing 'want_replacement' is always allowed. | |
3046 | * Once replacements starts it is too late though. | |
3047 | */ | |
3048 | err = 0; | |
3049 | clear_bit(WantReplacement, &rdev->flags); | |
3050 | } else if (cmd_match(buf, "replacement")) { | |
3051 | /* Can only set a device as a replacement when array has not | |
3052 | * yet been started. Once running, replacement is automatic | |
3053 | * from spares, or by assigning 'slot'. | |
3054 | */ | |
3055 | if (rdev->mddev->pers) | |
3056 | err = -EBUSY; | |
3057 | else { | |
3058 | set_bit(Replacement, &rdev->flags); | |
3059 | err = 0; | |
3060 | } | |
3061 | } else if (cmd_match(buf, "-replacement")) { | |
3062 | /* Similarly, can only clear Replacement before start */ | |
3063 | if (rdev->mddev->pers) | |
3064 | err = -EBUSY; | |
3065 | else { | |
3066 | clear_bit(Replacement, &rdev->flags); | |
3067 | err = 0; | |
3068 | } | |
a6da4ef8 | 3069 | } else if (cmd_match(buf, "re-add")) { |
ee37e621 YY |
3070 | if (!rdev->mddev->pers) |
3071 | err = -EINVAL; | |
3072 | else if (test_bit(Faulty, &rdev->flags) && (rdev->raid_disk == -1) && | |
3073 | rdev->saved_raid_disk >= 0) { | |
97f6cd39 GR |
3074 | /* clear_bit is performed _after_ all the devices |
3075 | * have their local Faulty bit cleared. If any writes | |
3076 | * happen in the meantime in the local node, they | |
3077 | * will land in the local bitmap, which will be synced | |
3078 | * by this node eventually | |
3079 | */ | |
3080 | if (!mddev_is_clustered(rdev->mddev) || | |
3081 | (err = md_cluster_ops->gather_bitmaps(rdev)) == 0) { | |
3082 | clear_bit(Faulty, &rdev->flags); | |
3083 | err = add_bound_rdev(rdev); | |
3084 | } | |
a6da4ef8 GR |
3085 | } else |
3086 | err = -EBUSY; | |
35b785f7 TM |
3087 | } else if (cmd_match(buf, "external_bbl") && (rdev->mddev->external)) { |
3088 | set_bit(ExternalBbl, &rdev->flags); | |
3089 | rdev->badblocks.shift = 0; | |
3090 | err = 0; | |
3091 | } else if (cmd_match(buf, "-external_bbl") && (rdev->mddev->external)) { | |
3092 | clear_bit(ExternalBbl, &rdev->flags); | |
3093 | err = 0; | |
45dc2de1 | 3094 | } |
8b9e2291 XN |
3095 | if (need_update_sb) |
3096 | md_update_sb(mddev, 1); | |
00bcb4ac N |
3097 | if (!err) |
3098 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
45dc2de1 N |
3099 | return err ? err : len; |
3100 | } | |
80ca3a44 | 3101 | static struct rdev_sysfs_entry rdev_state = |
750f199e | 3102 | __ATTR_PREALLOC(state, S_IRUGO|S_IWUSR, state_show, state_store); |
86e6ffdd | 3103 | |
4dbcdc75 | 3104 | static ssize_t |
3cb03002 | 3105 | errors_show(struct md_rdev *rdev, char *page) |
4dbcdc75 N |
3106 | { |
3107 | return sprintf(page, "%d\n", atomic_read(&rdev->corrected_errors)); | |
3108 | } | |
3109 | ||
3110 | static ssize_t | |
3cb03002 | 3111 | errors_store(struct md_rdev *rdev, const char *buf, size_t len) |
4dbcdc75 | 3112 | { |
4c9309c0 AD |
3113 | unsigned int n; |
3114 | int rv; | |
3115 | ||
3116 | rv = kstrtouint(buf, 10, &n); | |
3117 | if (rv < 0) | |
3118 | return rv; | |
3119 | atomic_set(&rdev->corrected_errors, n); | |
3120 | return len; | |
4dbcdc75 N |
3121 | } |
3122 | static struct rdev_sysfs_entry rdev_errors = | |
80ca3a44 | 3123 | __ATTR(errors, S_IRUGO|S_IWUSR, errors_show, errors_store); |
4dbcdc75 | 3124 | |
014236d2 | 3125 | static ssize_t |
3cb03002 | 3126 | slot_show(struct md_rdev *rdev, char *page) |
014236d2 | 3127 | { |
f2076e7d SL |
3128 | if (test_bit(Journal, &rdev->flags)) |
3129 | return sprintf(page, "journal\n"); | |
3130 | else if (rdev->raid_disk < 0) | |
014236d2 N |
3131 | return sprintf(page, "none\n"); |
3132 | else | |
3133 | return sprintf(page, "%d\n", rdev->raid_disk); | |
3134 | } | |
3135 | ||
3136 | static ssize_t | |
3cb03002 | 3137 | slot_store(struct md_rdev *rdev, const char *buf, size_t len) |
014236d2 | 3138 | { |
4c9309c0 | 3139 | int slot; |
c303da6d | 3140 | int err; |
4c9309c0 | 3141 | |
f2076e7d SL |
3142 | if (test_bit(Journal, &rdev->flags)) |
3143 | return -EBUSY; | |
014236d2 N |
3144 | if (strncmp(buf, "none", 4)==0) |
3145 | slot = -1; | |
4c9309c0 AD |
3146 | else { |
3147 | err = kstrtouint(buf, 10, (unsigned int *)&slot); | |
3148 | if (err < 0) | |
3149 | return err; | |
3150 | } | |
6c2fce2e | 3151 | if (rdev->mddev->pers && slot == -1) { |
c303da6d N |
3152 | /* Setting 'slot' on an active array requires also |
3153 | * updating the 'rd%d' link, and communicating | |
3154 | * with the personality with ->hot_*_disk. | |
3155 | * For now we only support removing | |
3156 | * failed/spare devices. This normally happens automatically, | |
3157 | * but not when the metadata is externally managed. | |
3158 | */ | |
c303da6d N |
3159 | if (rdev->raid_disk == -1) |
3160 | return -EEXIST; | |
3161 | /* personality does all needed checks */ | |
01393f3d | 3162 | if (rdev->mddev->pers->hot_remove_disk == NULL) |
c303da6d | 3163 | return -EINVAL; |
746d3207 N |
3164 | clear_bit(Blocked, &rdev->flags); |
3165 | remove_and_add_spares(rdev->mddev, rdev); | |
3166 | if (rdev->raid_disk >= 0) | |
3167 | return -EBUSY; | |
c303da6d N |
3168 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); |
3169 | md_wakeup_thread(rdev->mddev->thread); | |
6c2fce2e | 3170 | } else if (rdev->mddev->pers) { |
6c2fce2e | 3171 | /* Activating a spare .. or possibly reactivating |
6d56e278 | 3172 | * if we ever get bitmaps working here. |
6c2fce2e | 3173 | */ |
cb01c549 | 3174 | int err; |
6c2fce2e NB |
3175 | |
3176 | if (rdev->raid_disk != -1) | |
3177 | return -EBUSY; | |
3178 | ||
c6751b2b N |
3179 | if (test_bit(MD_RECOVERY_RUNNING, &rdev->mddev->recovery)) |
3180 | return -EBUSY; | |
3181 | ||
6c2fce2e NB |
3182 | if (rdev->mddev->pers->hot_add_disk == NULL) |
3183 | return -EINVAL; | |
3184 | ||
ba1b41b6 N |
3185 | if (slot >= rdev->mddev->raid_disks && |
3186 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
3187 | return -ENOSPC; | |
3188 | ||
6c2fce2e NB |
3189 | rdev->raid_disk = slot; |
3190 | if (test_bit(In_sync, &rdev->flags)) | |
3191 | rdev->saved_raid_disk = slot; | |
3192 | else | |
3193 | rdev->saved_raid_disk = -1; | |
d30519fc | 3194 | clear_bit(In_sync, &rdev->flags); |
8313b8e5 | 3195 | clear_bit(Bitmap_sync, &rdev->flags); |
3f79cc22 | 3196 | err = rdev->mddev->pers->hot_add_disk(rdev->mddev, rdev); |
cb01c549 GR |
3197 | if (err) { |
3198 | rdev->raid_disk = -1; | |
3199 | return err; | |
3200 | } else | |
3201 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
5e3b8a8d DLM |
3202 | /* failure here is OK */; |
3203 | sysfs_link_rdev(rdev->mddev, rdev); | |
6c2fce2e | 3204 | /* don't wakeup anyone, leave that to userspace. */ |
c303da6d | 3205 | } else { |
ba1b41b6 N |
3206 | if (slot >= rdev->mddev->raid_disks && |
3207 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
c303da6d N |
3208 | return -ENOSPC; |
3209 | rdev->raid_disk = slot; | |
3210 | /* assume it is working */ | |
c5d79adb N |
3211 | clear_bit(Faulty, &rdev->flags); |
3212 | clear_bit(WriteMostly, &rdev->flags); | |
c303da6d | 3213 | set_bit(In_sync, &rdev->flags); |
00bcb4ac | 3214 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
c303da6d | 3215 | } |
014236d2 N |
3216 | return len; |
3217 | } | |
3218 | ||
014236d2 | 3219 | static struct rdev_sysfs_entry rdev_slot = |
80ca3a44 | 3220 | __ATTR(slot, S_IRUGO|S_IWUSR, slot_show, slot_store); |
014236d2 | 3221 | |
93c8cad0 | 3222 | static ssize_t |
3cb03002 | 3223 | offset_show(struct md_rdev *rdev, char *page) |
93c8cad0 | 3224 | { |
6961ece4 | 3225 | return sprintf(page, "%llu\n", (unsigned long long)rdev->data_offset); |
93c8cad0 N |
3226 | } |
3227 | ||
3228 | static ssize_t | |
3cb03002 | 3229 | offset_store(struct md_rdev *rdev, const char *buf, size_t len) |
93c8cad0 | 3230 | { |
c6563a8c | 3231 | unsigned long long offset; |
b29bebd6 | 3232 | if (kstrtoull(buf, 10, &offset) < 0) |
93c8cad0 | 3233 | return -EINVAL; |
8ed0a521 | 3234 | if (rdev->mddev->pers && rdev->raid_disk >= 0) |
93c8cad0 | 3235 | return -EBUSY; |
dd8ac336 | 3236 | if (rdev->sectors && rdev->mddev->external) |
c5d79adb N |
3237 | /* Must set offset before size, so overlap checks |
3238 | * can be sane */ | |
3239 | return -EBUSY; | |
93c8cad0 | 3240 | rdev->data_offset = offset; |
25f7fd47 | 3241 | rdev->new_data_offset = offset; |
93c8cad0 N |
3242 | return len; |
3243 | } | |
3244 | ||
3245 | static struct rdev_sysfs_entry rdev_offset = | |
80ca3a44 | 3246 | __ATTR(offset, S_IRUGO|S_IWUSR, offset_show, offset_store); |
93c8cad0 | 3247 | |
c6563a8c N |
3248 | static ssize_t new_offset_show(struct md_rdev *rdev, char *page) |
3249 | { | |
3250 | return sprintf(page, "%llu\n", | |
3251 | (unsigned long long)rdev->new_data_offset); | |
3252 | } | |
3253 | ||
3254 | static ssize_t new_offset_store(struct md_rdev *rdev, | |
3255 | const char *buf, size_t len) | |
3256 | { | |
3257 | unsigned long long new_offset; | |
3258 | struct mddev *mddev = rdev->mddev; | |
3259 | ||
b29bebd6 | 3260 | if (kstrtoull(buf, 10, &new_offset) < 0) |
c6563a8c N |
3261 | return -EINVAL; |
3262 | ||
f851b60d N |
3263 | if (mddev->sync_thread || |
3264 | test_bit(MD_RECOVERY_RUNNING,&mddev->recovery)) | |
c6563a8c N |
3265 | return -EBUSY; |
3266 | if (new_offset == rdev->data_offset) | |
3267 | /* reset is always permitted */ | |
3268 | ; | |
3269 | else if (new_offset > rdev->data_offset) { | |
3270 | /* must not push array size beyond rdev_sectors */ | |
3271 | if (new_offset - rdev->data_offset | |
3272 | + mddev->dev_sectors > rdev->sectors) | |
3273 | return -E2BIG; | |
3274 | } | |
3275 | /* Metadata worries about other space details. */ | |
3276 | ||
3277 | /* decreasing the offset is inconsistent with a backwards | |
3278 | * reshape. | |
3279 | */ | |
3280 | if (new_offset < rdev->data_offset && | |
3281 | mddev->reshape_backwards) | |
3282 | return -EINVAL; | |
3283 | /* Increasing offset is inconsistent with forwards | |
3284 | * reshape. reshape_direction should be set to | |
3285 | * 'backwards' first. | |
3286 | */ | |
3287 | if (new_offset > rdev->data_offset && | |
3288 | !mddev->reshape_backwards) | |
3289 | return -EINVAL; | |
3290 | ||
3291 | if (mddev->pers && mddev->persistent && | |
3292 | !super_types[mddev->major_version] | |
3293 | .allow_new_offset(rdev, new_offset)) | |
3294 | return -E2BIG; | |
3295 | rdev->new_data_offset = new_offset; | |
3296 | if (new_offset > rdev->data_offset) | |
3297 | mddev->reshape_backwards = 1; | |
3298 | else if (new_offset < rdev->data_offset) | |
3299 | mddev->reshape_backwards = 0; | |
3300 | ||
3301 | return len; | |
3302 | } | |
3303 | static struct rdev_sysfs_entry rdev_new_offset = | |
3304 | __ATTR(new_offset, S_IRUGO|S_IWUSR, new_offset_show, new_offset_store); | |
3305 | ||
83303b61 | 3306 | static ssize_t |
3cb03002 | 3307 | rdev_size_show(struct md_rdev *rdev, char *page) |
83303b61 | 3308 | { |
dd8ac336 | 3309 | return sprintf(page, "%llu\n", (unsigned long long)rdev->sectors / 2); |
83303b61 N |
3310 | } |
3311 | ||
2652a1bd | 3312 | static int md_rdevs_overlap(struct md_rdev *a, struct md_rdev *b) |
c5d79adb N |
3313 | { |
3314 | /* check if two start/length pairs overlap */ | |
2652a1bd CH |
3315 | if (a->data_offset + a->sectors <= b->data_offset) |
3316 | return false; | |
3317 | if (b->data_offset + b->sectors <= a->data_offset) | |
3318 | return false; | |
3319 | return true; | |
3320 | } | |
3321 | ||
3322 | static bool md_rdev_overlaps(struct md_rdev *rdev) | |
3323 | { | |
3324 | struct mddev *mddev; | |
3325 | struct md_rdev *rdev2; | |
3326 | ||
3327 | spin_lock(&all_mddevs_lock); | |
3328 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) { | |
12a6caf2 CH |
3329 | if (test_bit(MD_DELETED, &mddev->flags)) |
3330 | continue; | |
2652a1bd CH |
3331 | rdev_for_each(rdev2, mddev) { |
3332 | if (rdev != rdev2 && rdev->bdev == rdev2->bdev && | |
3333 | md_rdevs_overlap(rdev, rdev2)) { | |
3334 | spin_unlock(&all_mddevs_lock); | |
3335 | return true; | |
3336 | } | |
3337 | } | |
3338 | } | |
3339 | spin_unlock(&all_mddevs_lock); | |
3340 | return false; | |
c5d79adb N |
3341 | } |
3342 | ||
b522adcd DW |
3343 | static int strict_blocks_to_sectors(const char *buf, sector_t *sectors) |
3344 | { | |
3345 | unsigned long long blocks; | |
3346 | sector_t new; | |
3347 | ||
b29bebd6 | 3348 | if (kstrtoull(buf, 10, &blocks) < 0) |
b522adcd DW |
3349 | return -EINVAL; |
3350 | ||
3351 | if (blocks & 1ULL << (8 * sizeof(blocks) - 1)) | |
3352 | return -EINVAL; /* sector conversion overflow */ | |
3353 | ||
3354 | new = blocks * 2; | |
3355 | if (new != blocks * 2) | |
3356 | return -EINVAL; /* unsigned long long to sector_t overflow */ | |
3357 | ||
3358 | *sectors = new; | |
3359 | return 0; | |
3360 | } | |
3361 | ||
83303b61 | 3362 | static ssize_t |
3cb03002 | 3363 | rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len) |
83303b61 | 3364 | { |
fd01b88c | 3365 | struct mddev *my_mddev = rdev->mddev; |
dd8ac336 | 3366 | sector_t oldsectors = rdev->sectors; |
b522adcd | 3367 | sector_t sectors; |
27c529bb | 3368 | |
f2076e7d SL |
3369 | if (test_bit(Journal, &rdev->flags)) |
3370 | return -EBUSY; | |
b522adcd | 3371 | if (strict_blocks_to_sectors(buf, §ors) < 0) |
d7027458 | 3372 | return -EINVAL; |
c6563a8c N |
3373 | if (rdev->data_offset != rdev->new_data_offset) |
3374 | return -EINVAL; /* too confusing */ | |
0cd17fec | 3375 | if (my_mddev->pers && rdev->raid_disk >= 0) { |
d7027458 | 3376 | if (my_mddev->persistent) { |
dd8ac336 AN |
3377 | sectors = super_types[my_mddev->major_version]. |
3378 | rdev_size_change(rdev, sectors); | |
3379 | if (!sectors) | |
0cd17fec | 3380 | return -EBUSY; |
dd8ac336 | 3381 | } else if (!sectors) |
0fe80347 | 3382 | sectors = bdev_nr_sectors(rdev->bdev) - |
dd8ac336 | 3383 | rdev->data_offset; |
a6468539 N |
3384 | if (!my_mddev->pers->resize) |
3385 | /* Cannot change size for RAID0 or Linear etc */ | |
3386 | return -EINVAL; | |
0cd17fec | 3387 | } |
dd8ac336 | 3388 | if (sectors < my_mddev->dev_sectors) |
7d3c6f87 | 3389 | return -EINVAL; /* component must fit device */ |
0cd17fec | 3390 | |
dd8ac336 | 3391 | rdev->sectors = sectors; |
2652a1bd CH |
3392 | |
3393 | /* | |
3394 | * Check that all other rdevs with the same bdev do not overlap. This | |
3395 | * check does not provide a hard guarantee, it just helps avoid | |
3396 | * dangerous mistakes. | |
3397 | */ | |
3398 | if (sectors > oldsectors && my_mddev->external && | |
3399 | md_rdev_overlaps(rdev)) { | |
3400 | /* | |
3401 | * Someone else could have slipped in a size change here, but | |
3402 | * doing so is just silly. We put oldsectors back because we | |
3403 | * know it is safe, and trust userspace not to race with itself. | |
c5d79adb | 3404 | */ |
2652a1bd CH |
3405 | rdev->sectors = oldsectors; |
3406 | return -EBUSY; | |
c5d79adb | 3407 | } |
83303b61 N |
3408 | return len; |
3409 | } | |
3410 | ||
3411 | static struct rdev_sysfs_entry rdev_size = | |
80ca3a44 | 3412 | __ATTR(size, S_IRUGO|S_IWUSR, rdev_size_show, rdev_size_store); |
83303b61 | 3413 | |
3cb03002 | 3414 | static ssize_t recovery_start_show(struct md_rdev *rdev, char *page) |
06e3c817 DW |
3415 | { |
3416 | unsigned long long recovery_start = rdev->recovery_offset; | |
3417 | ||
3418 | if (test_bit(In_sync, &rdev->flags) || | |
3419 | recovery_start == MaxSector) | |
3420 | return sprintf(page, "none\n"); | |
3421 | ||
3422 | return sprintf(page, "%llu\n", recovery_start); | |
3423 | } | |
3424 | ||
3cb03002 | 3425 | static ssize_t recovery_start_store(struct md_rdev *rdev, const char *buf, size_t len) |
06e3c817 DW |
3426 | { |
3427 | unsigned long long recovery_start; | |
3428 | ||
3429 | if (cmd_match(buf, "none")) | |
3430 | recovery_start = MaxSector; | |
b29bebd6 | 3431 | else if (kstrtoull(buf, 10, &recovery_start)) |
06e3c817 DW |
3432 | return -EINVAL; |
3433 | ||
3434 | if (rdev->mddev->pers && | |
3435 | rdev->raid_disk >= 0) | |
3436 | return -EBUSY; | |
3437 | ||
3438 | rdev->recovery_offset = recovery_start; | |
3439 | if (recovery_start == MaxSector) | |
3440 | set_bit(In_sync, &rdev->flags); | |
3441 | else | |
3442 | clear_bit(In_sync, &rdev->flags); | |
3443 | return len; | |
3444 | } | |
3445 | ||
3446 | static struct rdev_sysfs_entry rdev_recovery_start = | |
3447 | __ATTR(recovery_start, S_IRUGO|S_IWUSR, recovery_start_show, recovery_start_store); | |
3448 | ||
fc974ee2 VV |
3449 | /* sysfs access to bad-blocks list. |
3450 | * We present two files. | |
3451 | * 'bad-blocks' lists sector numbers and lengths of ranges that | |
3452 | * are recorded as bad. The list is truncated to fit within | |
3453 | * the one-page limit of sysfs. | |
3454 | * Writing "sector length" to this file adds an acknowledged | |
3455 | * bad block list. | |
3456 | * 'unacknowledged-bad-blocks' lists bad blocks that have not yet | |
3457 | * been acknowledged. Writing to this file adds bad blocks | |
3458 | * without acknowledging them. This is largely for testing. | |
3459 | */ | |
3cb03002 | 3460 | static ssize_t bb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3461 | { |
3462 | return badblocks_show(&rdev->badblocks, page, 0); | |
3463 | } | |
3cb03002 | 3464 | static ssize_t bb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 | 3465 | { |
de393cde N |
3466 | int rv = badblocks_store(&rdev->badblocks, page, len, 0); |
3467 | /* Maybe that ack was all we needed */ | |
3468 | if (test_and_clear_bit(BlockedBadBlocks, &rdev->flags)) | |
3469 | wake_up(&rdev->blocked_wait); | |
3470 | return rv; | |
16c791a5 N |
3471 | } |
3472 | static struct rdev_sysfs_entry rdev_bad_blocks = | |
3473 | __ATTR(bad_blocks, S_IRUGO|S_IWUSR, bb_show, bb_store); | |
3474 | ||
3cb03002 | 3475 | static ssize_t ubb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3476 | { |
3477 | return badblocks_show(&rdev->badblocks, page, 1); | |
3478 | } | |
3cb03002 | 3479 | static ssize_t ubb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 N |
3480 | { |
3481 | return badblocks_store(&rdev->badblocks, page, len, 1); | |
3482 | } | |
3483 | static struct rdev_sysfs_entry rdev_unack_bad_blocks = | |
3484 | __ATTR(unacknowledged_bad_blocks, S_IRUGO|S_IWUSR, ubb_show, ubb_store); | |
3485 | ||
664aed04 AP |
3486 | static ssize_t |
3487 | ppl_sector_show(struct md_rdev *rdev, char *page) | |
3488 | { | |
3489 | return sprintf(page, "%llu\n", (unsigned long long)rdev->ppl.sector); | |
3490 | } | |
3491 | ||
3492 | static ssize_t | |
3493 | ppl_sector_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3494 | { | |
3495 | unsigned long long sector; | |
3496 | ||
3497 | if (kstrtoull(buf, 10, §or) < 0) | |
3498 | return -EINVAL; | |
3499 | if (sector != (sector_t)sector) | |
3500 | return -EINVAL; | |
3501 | ||
3502 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3503 | rdev->raid_disk >= 0) | |
3504 | return -EBUSY; | |
3505 | ||
3506 | if (rdev->mddev->persistent) { | |
3507 | if (rdev->mddev->major_version == 0) | |
3508 | return -EINVAL; | |
3509 | if ((sector > rdev->sb_start && | |
3510 | sector - rdev->sb_start > S16_MAX) || | |
3511 | (sector < rdev->sb_start && | |
3512 | rdev->sb_start - sector > -S16_MIN)) | |
3513 | return -EINVAL; | |
3514 | rdev->ppl.offset = sector - rdev->sb_start; | |
3515 | } else if (!rdev->mddev->external) { | |
3516 | return -EBUSY; | |
3517 | } | |
3518 | rdev->ppl.sector = sector; | |
3519 | return len; | |
3520 | } | |
3521 | ||
3522 | static struct rdev_sysfs_entry rdev_ppl_sector = | |
3523 | __ATTR(ppl_sector, S_IRUGO|S_IWUSR, ppl_sector_show, ppl_sector_store); | |
3524 | ||
3525 | static ssize_t | |
3526 | ppl_size_show(struct md_rdev *rdev, char *page) | |
3527 | { | |
3528 | return sprintf(page, "%u\n", rdev->ppl.size); | |
3529 | } | |
3530 | ||
3531 | static ssize_t | |
3532 | ppl_size_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3533 | { | |
3534 | unsigned int size; | |
3535 | ||
3536 | if (kstrtouint(buf, 10, &size) < 0) | |
3537 | return -EINVAL; | |
3538 | ||
3539 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3540 | rdev->raid_disk >= 0) | |
3541 | return -EBUSY; | |
3542 | ||
3543 | if (rdev->mddev->persistent) { | |
3544 | if (rdev->mddev->major_version == 0) | |
3545 | return -EINVAL; | |
3546 | if (size > U16_MAX) | |
3547 | return -EINVAL; | |
3548 | } else if (!rdev->mddev->external) { | |
3549 | return -EBUSY; | |
3550 | } | |
3551 | rdev->ppl.size = size; | |
3552 | return len; | |
3553 | } | |
3554 | ||
3555 | static struct rdev_sysfs_entry rdev_ppl_size = | |
3556 | __ATTR(ppl_size, S_IRUGO|S_IWUSR, ppl_size_show, ppl_size_store); | |
3557 | ||
86e6ffdd N |
3558 | static struct attribute *rdev_default_attrs[] = { |
3559 | &rdev_state.attr, | |
4dbcdc75 | 3560 | &rdev_errors.attr, |
014236d2 | 3561 | &rdev_slot.attr, |
93c8cad0 | 3562 | &rdev_offset.attr, |
c6563a8c | 3563 | &rdev_new_offset.attr, |
83303b61 | 3564 | &rdev_size.attr, |
06e3c817 | 3565 | &rdev_recovery_start.attr, |
16c791a5 N |
3566 | &rdev_bad_blocks.attr, |
3567 | &rdev_unack_bad_blocks.attr, | |
664aed04 AP |
3568 | &rdev_ppl_sector.attr, |
3569 | &rdev_ppl_size.attr, | |
86e6ffdd N |
3570 | NULL, |
3571 | }; | |
1745e857 | 3572 | ATTRIBUTE_GROUPS(rdev_default); |
86e6ffdd N |
3573 | static ssize_t |
3574 | rdev_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
3575 | { | |
3576 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3577 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
86e6ffdd N |
3578 | |
3579 | if (!entry->show) | |
3580 | return -EIO; | |
758bfc8a | 3581 | if (!rdev->mddev) |
168b305b | 3582 | return -ENODEV; |
758bfc8a | 3583 | return entry->show(rdev, page); |
86e6ffdd N |
3584 | } |
3585 | ||
3586 | static ssize_t | |
3587 | rdev_attr_store(struct kobject *kobj, struct attribute *attr, | |
3588 | const char *page, size_t length) | |
3589 | { | |
3590 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3591 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
27c529bb | 3592 | ssize_t rv; |
fd01b88c | 3593 | struct mddev *mddev = rdev->mddev; |
86e6ffdd N |
3594 | |
3595 | if (!entry->store) | |
3596 | return -EIO; | |
67463acb N |
3597 | if (!capable(CAP_SYS_ADMIN)) |
3598 | return -EACCES; | |
c42d3240 | 3599 | rv = mddev ? mddev_lock(mddev) : -ENODEV; |
ca388059 | 3600 | if (!rv) { |
27c529bb | 3601 | if (rdev->mddev == NULL) |
c42d3240 | 3602 | rv = -ENODEV; |
27c529bb N |
3603 | else |
3604 | rv = entry->store(rdev, page, length); | |
6a51830e | 3605 | mddev_unlock(mddev); |
ca388059 N |
3606 | } |
3607 | return rv; | |
86e6ffdd N |
3608 | } |
3609 | ||
3610 | static void rdev_free(struct kobject *ko) | |
3611 | { | |
3cb03002 | 3612 | struct md_rdev *rdev = container_of(ko, struct md_rdev, kobj); |
86e6ffdd N |
3613 | kfree(rdev); |
3614 | } | |
52cf25d0 | 3615 | static const struct sysfs_ops rdev_sysfs_ops = { |
86e6ffdd N |
3616 | .show = rdev_attr_show, |
3617 | .store = rdev_attr_store, | |
3618 | }; | |
3619 | static struct kobj_type rdev_ktype = { | |
3620 | .release = rdev_free, | |
3621 | .sysfs_ops = &rdev_sysfs_ops, | |
1745e857 | 3622 | .default_groups = rdev_default_groups, |
86e6ffdd N |
3623 | }; |
3624 | ||
3cb03002 | 3625 | int md_rdev_init(struct md_rdev *rdev) |
e8bb9a83 N |
3626 | { |
3627 | rdev->desc_nr = -1; | |
3628 | rdev->saved_raid_disk = -1; | |
3629 | rdev->raid_disk = -1; | |
3630 | rdev->flags = 0; | |
3631 | rdev->data_offset = 0; | |
c6563a8c | 3632 | rdev->new_data_offset = 0; |
e8bb9a83 | 3633 | rdev->sb_events = 0; |
0e3ef49e | 3634 | rdev->last_read_error = 0; |
2699b672 N |
3635 | rdev->sb_loaded = 0; |
3636 | rdev->bb_page = NULL; | |
e8bb9a83 N |
3637 | atomic_set(&rdev->nr_pending, 0); |
3638 | atomic_set(&rdev->read_errors, 0); | |
3639 | atomic_set(&rdev->corrected_errors, 0); | |
3640 | ||
3641 | INIT_LIST_HEAD(&rdev->same_set); | |
3642 | init_waitqueue_head(&rdev->blocked_wait); | |
2230dfe4 N |
3643 | |
3644 | /* Add space to store bad block list. | |
3645 | * This reserves the space even on arrays where it cannot | |
3646 | * be used - I wonder if that matters | |
3647 | */ | |
fc974ee2 | 3648 | return badblocks_init(&rdev->badblocks, 0); |
e8bb9a83 N |
3649 | } |
3650 | EXPORT_SYMBOL_GPL(md_rdev_init); | |
1da177e4 LT |
3651 | /* |
3652 | * Import a device. If 'super_format' >= 0, then sanity check the superblock | |
3653 | * | |
3654 | * mark the device faulty if: | |
3655 | * | |
3656 | * - the device is nonexistent (zero size) | |
3657 | * - the device has no valid superblock | |
3658 | * | |
3659 | * a faulty rdev _never_ has rdev->sb set. | |
3660 | */ | |
3cb03002 | 3661 | static struct md_rdev *md_import_device(dev_t newdev, int super_format, int super_minor) |
1da177e4 | 3662 | { |
1da177e4 | 3663 | int err; |
3cb03002 | 3664 | struct md_rdev *rdev; |
1da177e4 LT |
3665 | sector_t size; |
3666 | ||
9ffae0cf | 3667 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
9d48739e | 3668 | if (!rdev) |
1da177e4 | 3669 | return ERR_PTR(-ENOMEM); |
1da177e4 | 3670 | |
2230dfe4 N |
3671 | err = md_rdev_init(rdev); |
3672 | if (err) | |
3673 | goto abort_free; | |
3674 | err = alloc_disk_sb(rdev); | |
3675 | if (err) | |
1da177e4 LT |
3676 | goto abort_free; |
3677 | ||
c5d79adb | 3678 | err = lock_rdev(rdev, newdev, super_format == -2); |
1da177e4 LT |
3679 | if (err) |
3680 | goto abort_free; | |
3681 | ||
f9cb074b | 3682 | kobject_init(&rdev->kobj, &rdev_ktype); |
86e6ffdd | 3683 | |
0fe80347 | 3684 | size = bdev_nr_bytes(rdev->bdev) >> BLOCK_SIZE_BITS; |
1da177e4 | 3685 | if (!size) { |
913cce5a CH |
3686 | pr_warn("md: %pg has zero or unknown size, marking faulty!\n", |
3687 | rdev->bdev); | |
1da177e4 LT |
3688 | err = -EINVAL; |
3689 | goto abort_free; | |
3690 | } | |
3691 | ||
3692 | if (super_format >= 0) { | |
3693 | err = super_types[super_format]. | |
3694 | load_super(rdev, NULL, super_minor); | |
3695 | if (err == -EINVAL) { | |
913cce5a CH |
3696 | pr_warn("md: %pg does not have a valid v%d.%d superblock, not importing!\n", |
3697 | rdev->bdev, | |
9d48739e | 3698 | super_format, super_minor); |
1da177e4 LT |
3699 | goto abort_free; |
3700 | } | |
3701 | if (err < 0) { | |
913cce5a CH |
3702 | pr_warn("md: could not read %pg's sb, not importing!\n", |
3703 | rdev->bdev); | |
1da177e4 LT |
3704 | goto abort_free; |
3705 | } | |
3706 | } | |
6bfe0b49 | 3707 | |
1da177e4 LT |
3708 | return rdev; |
3709 | ||
3710 | abort_free: | |
2699b672 N |
3711 | if (rdev->bdev) |
3712 | unlock_rdev(rdev); | |
545c8795 | 3713 | md_rdev_clear(rdev); |
1da177e4 LT |
3714 | kfree(rdev); |
3715 | return ERR_PTR(err); | |
3716 | } | |
3717 | ||
3718 | /* | |
3719 | * Check a full RAID array for plausibility | |
3720 | */ | |
3721 | ||
6a5cb53a | 3722 | static int analyze_sbs(struct mddev *mddev) |
1da177e4 LT |
3723 | { |
3724 | int i; | |
3cb03002 | 3725 | struct md_rdev *rdev, *freshest, *tmp; |
1da177e4 LT |
3726 | |
3727 | freshest = NULL; | |
dafb20fa | 3728 | rdev_for_each_safe(rdev, tmp, mddev) |
1da177e4 LT |
3729 | switch (super_types[mddev->major_version]. |
3730 | load_super(rdev, freshest, mddev->minor_version)) { | |
3731 | case 1: | |
3732 | freshest = rdev; | |
3733 | break; | |
3734 | case 0: | |
3735 | break; | |
3736 | default: | |
913cce5a CH |
3737 | pr_warn("md: fatal superblock inconsistency in %pg -- removing from array\n", |
3738 | rdev->bdev); | |
fb56dfef | 3739 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3740 | } |
3741 | ||
6a5cb53a YY |
3742 | /* Cannot find a valid fresh disk */ |
3743 | if (!freshest) { | |
3744 | pr_warn("md: cannot find a valid disk\n"); | |
3745 | return -EINVAL; | |
3746 | } | |
3747 | ||
1da177e4 LT |
3748 | super_types[mddev->major_version]. |
3749 | validate_super(mddev, freshest); | |
3750 | ||
3751 | i = 0; | |
dafb20fa | 3752 | rdev_for_each_safe(rdev, tmp, mddev) { |
233fca36 N |
3753 | if (mddev->max_disks && |
3754 | (rdev->desc_nr >= mddev->max_disks || | |
3755 | i > mddev->max_disks)) { | |
913cce5a CH |
3756 | pr_warn("md: %s: %pg: only %d devices permitted\n", |
3757 | mdname(mddev), rdev->bdev, | |
9d48739e | 3758 | mddev->max_disks); |
fb56dfef | 3759 | md_kick_rdev_from_array(rdev); |
de01dfad N |
3760 | continue; |
3761 | } | |
1aee41f6 | 3762 | if (rdev != freshest) { |
1da177e4 LT |
3763 | if (super_types[mddev->major_version]. |
3764 | validate_super(mddev, rdev)) { | |
913cce5a CH |
3765 | pr_warn("md: kicking non-fresh %pg from array!\n", |
3766 | rdev->bdev); | |
fb56dfef | 3767 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3768 | continue; |
3769 | } | |
1aee41f6 | 3770 | } |
1da177e4 LT |
3771 | if (mddev->level == LEVEL_MULTIPATH) { |
3772 | rdev->desc_nr = i++; | |
3773 | rdev->raid_disk = rdev->desc_nr; | |
b2d444d7 | 3774 | set_bit(In_sync, &rdev->flags); |
f2076e7d SL |
3775 | } else if (rdev->raid_disk >= |
3776 | (mddev->raid_disks - min(0, mddev->delta_disks)) && | |
3777 | !test_bit(Journal, &rdev->flags)) { | |
a778b73f N |
3778 | rdev->raid_disk = -1; |
3779 | clear_bit(In_sync, &rdev->flags); | |
1da177e4 LT |
3780 | } |
3781 | } | |
6a5cb53a YY |
3782 | |
3783 | return 0; | |
1da177e4 LT |
3784 | } |
3785 | ||
72e02075 N |
3786 | /* Read a fixed-point number. |
3787 | * Numbers in sysfs attributes should be in "standard" units where | |
3788 | * possible, so time should be in seconds. | |
f72ffdd6 | 3789 | * However we internally use a a much smaller unit such as |
72e02075 N |
3790 | * milliseconds or jiffies. |
3791 | * This function takes a decimal number with a possible fractional | |
3792 | * component, and produces an integer which is the result of | |
3793 | * multiplying that number by 10^'scale'. | |
3794 | * all without any floating-point arithmetic. | |
3795 | */ | |
3796 | int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale) | |
3797 | { | |
3798 | unsigned long result = 0; | |
3799 | long decimals = -1; | |
3800 | while (isdigit(*cp) || (*cp == '.' && decimals < 0)) { | |
3801 | if (*cp == '.') | |
3802 | decimals = 0; | |
3803 | else if (decimals < scale) { | |
3804 | unsigned int value; | |
3805 | value = *cp - '0'; | |
3806 | result = result * 10 + value; | |
3807 | if (decimals >= 0) | |
3808 | decimals++; | |
3809 | } | |
3810 | cp++; | |
3811 | } | |
3812 | if (*cp == '\n') | |
3813 | cp++; | |
3814 | if (*cp) | |
3815 | return -EINVAL; | |
3816 | if (decimals < 0) | |
3817 | decimals = 0; | |
cf891607 | 3818 | *res = result * int_pow(10, scale - decimals); |
72e02075 N |
3819 | return 0; |
3820 | } | |
3821 | ||
16f17b39 | 3822 | static ssize_t |
fd01b88c | 3823 | safe_delay_show(struct mddev *mddev, char *page) |
16f17b39 N |
3824 | { |
3825 | int msec = (mddev->safemode_delay*1000)/HZ; | |
3826 | return sprintf(page, "%d.%03d\n", msec/1000, msec%1000); | |
3827 | } | |
3828 | static ssize_t | |
fd01b88c | 3829 | safe_delay_store(struct mddev *mddev, const char *cbuf, size_t len) |
16f17b39 | 3830 | { |
16f17b39 | 3831 | unsigned long msec; |
97ce0a7f | 3832 | |
28c1b9fd | 3833 | if (mddev_is_clustered(mddev)) { |
9d48739e | 3834 | pr_warn("md: Safemode is disabled for clustered mode\n"); |
28c1b9fd GR |
3835 | return -EINVAL; |
3836 | } | |
3837 | ||
72e02075 | 3838 | if (strict_strtoul_scaled(cbuf, &msec, 3) < 0) |
16f17b39 | 3839 | return -EINVAL; |
16f17b39 N |
3840 | if (msec == 0) |
3841 | mddev->safemode_delay = 0; | |
3842 | else { | |
19052c0e | 3843 | unsigned long old_delay = mddev->safemode_delay; |
1b30e66f N |
3844 | unsigned long new_delay = (msec*HZ)/1000; |
3845 | ||
3846 | if (new_delay == 0) | |
3847 | new_delay = 1; | |
3848 | mddev->safemode_delay = new_delay; | |
3849 | if (new_delay < old_delay || old_delay == 0) | |
3850 | mod_timer(&mddev->safemode_timer, jiffies+1); | |
16f17b39 N |
3851 | } |
3852 | return len; | |
3853 | } | |
3854 | static struct md_sysfs_entry md_safe_delay = | |
80ca3a44 | 3855 | __ATTR(safe_mode_delay, S_IRUGO|S_IWUSR,safe_delay_show, safe_delay_store); |
16f17b39 | 3856 | |
eae1701f | 3857 | static ssize_t |
fd01b88c | 3858 | level_show(struct mddev *mddev, char *page) |
eae1701f | 3859 | { |
36d091f4 N |
3860 | struct md_personality *p; |
3861 | int ret; | |
3862 | spin_lock(&mddev->lock); | |
3863 | p = mddev->pers; | |
d9d166c2 | 3864 | if (p) |
36d091f4 | 3865 | ret = sprintf(page, "%s\n", p->name); |
d9d166c2 | 3866 | else if (mddev->clevel[0]) |
36d091f4 | 3867 | ret = sprintf(page, "%s\n", mddev->clevel); |
d9d166c2 | 3868 | else if (mddev->level != LEVEL_NONE) |
36d091f4 | 3869 | ret = sprintf(page, "%d\n", mddev->level); |
d9d166c2 | 3870 | else |
36d091f4 N |
3871 | ret = 0; |
3872 | spin_unlock(&mddev->lock); | |
3873 | return ret; | |
eae1701f N |
3874 | } |
3875 | ||
d9d166c2 | 3876 | static ssize_t |
fd01b88c | 3877 | level_store(struct mddev *mddev, const char *buf, size_t len) |
d9d166c2 | 3878 | { |
f2859af6 | 3879 | char clevel[16]; |
6791875e N |
3880 | ssize_t rv; |
3881 | size_t slen = len; | |
db721d32 | 3882 | struct md_personality *pers, *oldpers; |
f2859af6 | 3883 | long level; |
db721d32 | 3884 | void *priv, *oldpriv; |
3cb03002 | 3885 | struct md_rdev *rdev; |
245f46c2 | 3886 | |
6791875e N |
3887 | if (slen == 0 || slen >= sizeof(clevel)) |
3888 | return -EINVAL; | |
3889 | ||
3890 | rv = mddev_lock(mddev); | |
3891 | if (rv) | |
3892 | return rv; | |
3893 | ||
245f46c2 | 3894 | if (mddev->pers == NULL) { |
6791875e N |
3895 | strncpy(mddev->clevel, buf, slen); |
3896 | if (mddev->clevel[slen-1] == '\n') | |
3897 | slen--; | |
3898 | mddev->clevel[slen] = 0; | |
245f46c2 | 3899 | mddev->level = LEVEL_NONE; |
6791875e N |
3900 | rv = len; |
3901 | goto out_unlock; | |
245f46c2 | 3902 | } |
6791875e | 3903 | rv = -EROFS; |
bd8839e0 | 3904 | if (mddev->ro) |
6791875e | 3905 | goto out_unlock; |
245f46c2 N |
3906 | |
3907 | /* request to change the personality. Need to ensure: | |
3908 | * - array is not engaged in resync/recovery/reshape | |
3909 | * - old personality can be suspended | |
3910 | * - new personality will access other array. | |
3911 | */ | |
3912 | ||
6791875e | 3913 | rv = -EBUSY; |
bb4f1e9d | 3914 | if (mddev->sync_thread || |
f851b60d | 3915 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
bb4f1e9d N |
3916 | mddev->reshape_position != MaxSector || |
3917 | mddev->sysfs_active) | |
6791875e | 3918 | goto out_unlock; |
245f46c2 | 3919 | |
6791875e | 3920 | rv = -EINVAL; |
245f46c2 | 3921 | if (!mddev->pers->quiesce) { |
9d48739e N |
3922 | pr_warn("md: %s: %s does not support online personality change\n", |
3923 | mdname(mddev), mddev->pers->name); | |
6791875e | 3924 | goto out_unlock; |
245f46c2 N |
3925 | } |
3926 | ||
3927 | /* Now find the new personality */ | |
6791875e N |
3928 | strncpy(clevel, buf, slen); |
3929 | if (clevel[slen-1] == '\n') | |
3930 | slen--; | |
3931 | clevel[slen] = 0; | |
b29bebd6 | 3932 | if (kstrtol(clevel, 10, &level)) |
f2859af6 | 3933 | level = LEVEL_NONE; |
245f46c2 | 3934 | |
f2859af6 DW |
3935 | if (request_module("md-%s", clevel) != 0) |
3936 | request_module("md-level-%s", clevel); | |
245f46c2 | 3937 | spin_lock(&pers_lock); |
f2859af6 | 3938 | pers = find_pers(level, clevel); |
245f46c2 N |
3939 | if (!pers || !try_module_get(pers->owner)) { |
3940 | spin_unlock(&pers_lock); | |
9d48739e | 3941 | pr_warn("md: personality %s not loaded\n", clevel); |
6791875e N |
3942 | rv = -EINVAL; |
3943 | goto out_unlock; | |
245f46c2 N |
3944 | } |
3945 | spin_unlock(&pers_lock); | |
3946 | ||
3947 | if (pers == mddev->pers) { | |
3948 | /* Nothing to do! */ | |
3949 | module_put(pers->owner); | |
6791875e N |
3950 | rv = len; |
3951 | goto out_unlock; | |
245f46c2 N |
3952 | } |
3953 | if (!pers->takeover) { | |
3954 | module_put(pers->owner); | |
9d48739e N |
3955 | pr_warn("md: %s: %s does not support personality takeover\n", |
3956 | mdname(mddev), clevel); | |
6791875e N |
3957 | rv = -EINVAL; |
3958 | goto out_unlock; | |
245f46c2 N |
3959 | } |
3960 | ||
dafb20fa | 3961 | rdev_for_each(rdev, mddev) |
e93f68a1 N |
3962 | rdev->new_raid_disk = rdev->raid_disk; |
3963 | ||
245f46c2 N |
3964 | /* ->takeover must set new_* and/or delta_disks |
3965 | * if it succeeds, and may set them when it fails. | |
3966 | */ | |
3967 | priv = pers->takeover(mddev); | |
3968 | if (IS_ERR(priv)) { | |
3969 | mddev->new_level = mddev->level; | |
3970 | mddev->new_layout = mddev->layout; | |
664e7c41 | 3971 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
245f46c2 N |
3972 | mddev->raid_disks -= mddev->delta_disks; |
3973 | mddev->delta_disks = 0; | |
2c810cdd | 3974 | mddev->reshape_backwards = 0; |
245f46c2 | 3975 | module_put(pers->owner); |
9d48739e N |
3976 | pr_warn("md: %s: %s would not accept array\n", |
3977 | mdname(mddev), clevel); | |
6791875e N |
3978 | rv = PTR_ERR(priv); |
3979 | goto out_unlock; | |
245f46c2 N |
3980 | } |
3981 | ||
3982 | /* Looks like we have a winner */ | |
3983 | mddev_suspend(mddev); | |
5aa61f42 | 3984 | mddev_detach(mddev); |
36d091f4 N |
3985 | |
3986 | spin_lock(&mddev->lock); | |
db721d32 N |
3987 | oldpers = mddev->pers; |
3988 | oldpriv = mddev->private; | |
3989 | mddev->pers = pers; | |
3990 | mddev->private = priv; | |
92d9aac9 | 3991 | strscpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
db721d32 N |
3992 | mddev->level = mddev->new_level; |
3993 | mddev->layout = mddev->new_layout; | |
3994 | mddev->chunk_sectors = mddev->new_chunk_sectors; | |
3995 | mddev->delta_disks = 0; | |
3996 | mddev->reshape_backwards = 0; | |
3997 | mddev->degraded = 0; | |
36d091f4 | 3998 | spin_unlock(&mddev->lock); |
db721d32 N |
3999 | |
4000 | if (oldpers->sync_request == NULL && | |
4001 | mddev->external) { | |
4002 | /* We are converting from a no-redundancy array | |
4003 | * to a redundancy array and metadata is managed | |
4004 | * externally so we need to be sure that writes | |
4005 | * won't block due to a need to transition | |
4006 | * clean->dirty | |
4007 | * until external management is started. | |
4008 | */ | |
4009 | mddev->in_sync = 0; | |
4010 | mddev->safemode_delay = 0; | |
4011 | mddev->safemode = 0; | |
4012 | } | |
f72ffdd6 | 4013 | |
db721d32 N |
4014 | oldpers->free(mddev, oldpriv); |
4015 | ||
4016 | if (oldpers->sync_request == NULL && | |
a64c876f N |
4017 | pers->sync_request != NULL) { |
4018 | /* need to add the md_redundancy_group */ | |
4019 | if (sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
4020 | pr_warn("md: cannot register extra attributes for %s\n", |
4021 | mdname(mddev)); | |
388975cc | 4022 | mddev->sysfs_action = sysfs_get_dirent(mddev->kobj.sd, "sync_action"); |
e8efa9b8 JB |
4023 | mddev->sysfs_completed = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_completed"); |
4024 | mddev->sysfs_degraded = sysfs_get_dirent_safe(mddev->kobj.sd, "degraded"); | |
f72ffdd6 | 4025 | } |
db721d32 | 4026 | if (oldpers->sync_request != NULL && |
a64c876f N |
4027 | pers->sync_request == NULL) { |
4028 | /* need to remove the md_redundancy_group */ | |
4029 | if (mddev->to_remove == NULL) | |
4030 | mddev->to_remove = &md_redundancy_group; | |
4031 | } | |
4032 | ||
4cb9da7d AO |
4033 | module_put(oldpers->owner); |
4034 | ||
dafb20fa | 4035 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
4036 | if (rdev->raid_disk < 0) |
4037 | continue; | |
bf2cb0da | 4038 | if (rdev->new_raid_disk >= mddev->raid_disks) |
e93f68a1 N |
4039 | rdev->new_raid_disk = -1; |
4040 | if (rdev->new_raid_disk == rdev->raid_disk) | |
4041 | continue; | |
36fad858 | 4042 | sysfs_unlink_rdev(mddev, rdev); |
e93f68a1 | 4043 | } |
dafb20fa | 4044 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
4045 | if (rdev->raid_disk < 0) |
4046 | continue; | |
4047 | if (rdev->new_raid_disk == rdev->raid_disk) | |
4048 | continue; | |
4049 | rdev->raid_disk = rdev->new_raid_disk; | |
4050 | if (rdev->raid_disk < 0) | |
3a981b03 | 4051 | clear_bit(In_sync, &rdev->flags); |
e93f68a1 | 4052 | else { |
36fad858 | 4053 | if (sysfs_link_rdev(mddev, rdev)) |
9d48739e N |
4054 | pr_warn("md: cannot register rd%d for %s after level change\n", |
4055 | rdev->raid_disk, mdname(mddev)); | |
3a981b03 | 4056 | } |
e93f68a1 N |
4057 | } |
4058 | ||
db721d32 | 4059 | if (pers->sync_request == NULL) { |
9af204cf TM |
4060 | /* this is now an array without redundancy, so |
4061 | * it must always be in_sync | |
4062 | */ | |
4063 | mddev->in_sync = 1; | |
4064 | del_timer_sync(&mddev->safemode_timer); | |
4065 | } | |
02e5f5c0 | 4066 | blk_set_stacking_limits(&mddev->queue->limits); |
245f46c2 | 4067 | pers->run(mddev); |
2953079c | 4068 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
47525e59 | 4069 | mddev_resume(mddev); |
830778a1 N |
4070 | if (!mddev->thread) |
4071 | md_update_sb(mddev, 1); | |
e1a86dbb | 4072 | sysfs_notify_dirent_safe(mddev->sysfs_level); |
54679486 | 4073 | md_new_event(); |
6791875e N |
4074 | rv = len; |
4075 | out_unlock: | |
4076 | mddev_unlock(mddev); | |
d9d166c2 N |
4077 | return rv; |
4078 | } | |
4079 | ||
4080 | static struct md_sysfs_entry md_level = | |
80ca3a44 | 4081 | __ATTR(level, S_IRUGO|S_IWUSR, level_show, level_store); |
eae1701f | 4082 | |
d4dbd025 | 4083 | static ssize_t |
fd01b88c | 4084 | layout_show(struct mddev *mddev, char *page) |
d4dbd025 N |
4085 | { |
4086 | /* just a number, not meaningful for all levels */ | |
08a02ecd N |
4087 | if (mddev->reshape_position != MaxSector && |
4088 | mddev->layout != mddev->new_layout) | |
4089 | return sprintf(page, "%d (%d)\n", | |
4090 | mddev->new_layout, mddev->layout); | |
d4dbd025 N |
4091 | return sprintf(page, "%d\n", mddev->layout); |
4092 | } | |
4093 | ||
4094 | static ssize_t | |
fd01b88c | 4095 | layout_store(struct mddev *mddev, const char *buf, size_t len) |
d4dbd025 | 4096 | { |
4c9309c0 | 4097 | unsigned int n; |
6791875e | 4098 | int err; |
d4dbd025 | 4099 | |
4c9309c0 AD |
4100 | err = kstrtouint(buf, 10, &n); |
4101 | if (err < 0) | |
4102 | return err; | |
6791875e N |
4103 | err = mddev_lock(mddev); |
4104 | if (err) | |
4105 | return err; | |
d4dbd025 | 4106 | |
b3546035 | 4107 | if (mddev->pers) { |
50ac168a | 4108 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
4109 | err = -EBUSY; |
4110 | else if (mddev->ro) | |
4111 | err = -EROFS; | |
4112 | else { | |
4113 | mddev->new_layout = n; | |
4114 | err = mddev->pers->check_reshape(mddev); | |
4115 | if (err) | |
4116 | mddev->new_layout = mddev->layout; | |
597a711b | 4117 | } |
b3546035 | 4118 | } else { |
08a02ecd | 4119 | mddev->new_layout = n; |
b3546035 N |
4120 | if (mddev->reshape_position == MaxSector) |
4121 | mddev->layout = n; | |
4122 | } | |
6791875e N |
4123 | mddev_unlock(mddev); |
4124 | return err ?: len; | |
d4dbd025 N |
4125 | } |
4126 | static struct md_sysfs_entry md_layout = | |
80ca3a44 | 4127 | __ATTR(layout, S_IRUGO|S_IWUSR, layout_show, layout_store); |
d4dbd025 | 4128 | |
eae1701f | 4129 | static ssize_t |
fd01b88c | 4130 | raid_disks_show(struct mddev *mddev, char *page) |
eae1701f | 4131 | { |
bb636547 N |
4132 | if (mddev->raid_disks == 0) |
4133 | return 0; | |
08a02ecd N |
4134 | if (mddev->reshape_position != MaxSector && |
4135 | mddev->delta_disks != 0) | |
4136 | return sprintf(page, "%d (%d)\n", mddev->raid_disks, | |
4137 | mddev->raid_disks - mddev->delta_disks); | |
eae1701f N |
4138 | return sprintf(page, "%d\n", mddev->raid_disks); |
4139 | } | |
4140 | ||
fd01b88c | 4141 | static int update_raid_disks(struct mddev *mddev, int raid_disks); |
da943b99 N |
4142 | |
4143 | static ssize_t | |
fd01b88c | 4144 | raid_disks_store(struct mddev *mddev, const char *buf, size_t len) |
da943b99 | 4145 | { |
4c9309c0 | 4146 | unsigned int n; |
6791875e | 4147 | int err; |
da943b99 | 4148 | |
4c9309c0 AD |
4149 | err = kstrtouint(buf, 10, &n); |
4150 | if (err < 0) | |
4151 | return err; | |
da943b99 | 4152 | |
6791875e N |
4153 | err = mddev_lock(mddev); |
4154 | if (err) | |
4155 | return err; | |
da943b99 | 4156 | if (mddev->pers) |
6791875e | 4157 | err = update_raid_disks(mddev, n); |
08a02ecd | 4158 | else if (mddev->reshape_position != MaxSector) { |
c6563a8c | 4159 | struct md_rdev *rdev; |
08a02ecd | 4160 | int olddisks = mddev->raid_disks - mddev->delta_disks; |
c6563a8c | 4161 | |
6791875e | 4162 | err = -EINVAL; |
c6563a8c N |
4163 | rdev_for_each(rdev, mddev) { |
4164 | if (olddisks < n && | |
4165 | rdev->data_offset < rdev->new_data_offset) | |
6791875e | 4166 | goto out_unlock; |
c6563a8c N |
4167 | if (olddisks > n && |
4168 | rdev->data_offset > rdev->new_data_offset) | |
6791875e | 4169 | goto out_unlock; |
c6563a8c | 4170 | } |
6791875e | 4171 | err = 0; |
08a02ecd N |
4172 | mddev->delta_disks = n - olddisks; |
4173 | mddev->raid_disks = n; | |
2c810cdd | 4174 | mddev->reshape_backwards = (mddev->delta_disks < 0); |
08a02ecd | 4175 | } else |
da943b99 | 4176 | mddev->raid_disks = n; |
6791875e N |
4177 | out_unlock: |
4178 | mddev_unlock(mddev); | |
4179 | return err ? err : len; | |
da943b99 N |
4180 | } |
4181 | static struct md_sysfs_entry md_raid_disks = | |
80ca3a44 | 4182 | __ATTR(raid_disks, S_IRUGO|S_IWUSR, raid_disks_show, raid_disks_store); |
eae1701f | 4183 | |
ec164d07 SP |
4184 | static ssize_t |
4185 | uuid_show(struct mddev *mddev, char *page) | |
4186 | { | |
4187 | return sprintf(page, "%pU\n", mddev->uuid); | |
4188 | } | |
4189 | static struct md_sysfs_entry md_uuid = | |
4190 | __ATTR(uuid, S_IRUGO, uuid_show, NULL); | |
4191 | ||
3b34380a | 4192 | static ssize_t |
fd01b88c | 4193 | chunk_size_show(struct mddev *mddev, char *page) |
3b34380a | 4194 | { |
08a02ecd | 4195 | if (mddev->reshape_position != MaxSector && |
664e7c41 AN |
4196 | mddev->chunk_sectors != mddev->new_chunk_sectors) |
4197 | return sprintf(page, "%d (%d)\n", | |
4198 | mddev->new_chunk_sectors << 9, | |
9d8f0363 AN |
4199 | mddev->chunk_sectors << 9); |
4200 | return sprintf(page, "%d\n", mddev->chunk_sectors << 9); | |
3b34380a N |
4201 | } |
4202 | ||
4203 | static ssize_t | |
fd01b88c | 4204 | chunk_size_store(struct mddev *mddev, const char *buf, size_t len) |
3b34380a | 4205 | { |
4c9309c0 | 4206 | unsigned long n; |
6791875e | 4207 | int err; |
3b34380a | 4208 | |
4c9309c0 AD |
4209 | err = kstrtoul(buf, 10, &n); |
4210 | if (err < 0) | |
4211 | return err; | |
3b34380a | 4212 | |
6791875e N |
4213 | err = mddev_lock(mddev); |
4214 | if (err) | |
4215 | return err; | |
b3546035 | 4216 | if (mddev->pers) { |
50ac168a | 4217 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
4218 | err = -EBUSY; |
4219 | else if (mddev->ro) | |
4220 | err = -EROFS; | |
4221 | else { | |
4222 | mddev->new_chunk_sectors = n >> 9; | |
4223 | err = mddev->pers->check_reshape(mddev); | |
4224 | if (err) | |
4225 | mddev->new_chunk_sectors = mddev->chunk_sectors; | |
597a711b | 4226 | } |
b3546035 | 4227 | } else { |
664e7c41 | 4228 | mddev->new_chunk_sectors = n >> 9; |
b3546035 | 4229 | if (mddev->reshape_position == MaxSector) |
9d8f0363 | 4230 | mddev->chunk_sectors = n >> 9; |
b3546035 | 4231 | } |
6791875e N |
4232 | mddev_unlock(mddev); |
4233 | return err ?: len; | |
3b34380a N |
4234 | } |
4235 | static struct md_sysfs_entry md_chunk_size = | |
80ca3a44 | 4236 | __ATTR(chunk_size, S_IRUGO|S_IWUSR, chunk_size_show, chunk_size_store); |
3b34380a | 4237 | |
a94213b1 | 4238 | static ssize_t |
fd01b88c | 4239 | resync_start_show(struct mddev *mddev, char *page) |
a94213b1 | 4240 | { |
d1a7c503 N |
4241 | if (mddev->recovery_cp == MaxSector) |
4242 | return sprintf(page, "none\n"); | |
a94213b1 N |
4243 | return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp); |
4244 | } | |
4245 | ||
4246 | static ssize_t | |
fd01b88c | 4247 | resync_start_store(struct mddev *mddev, const char *buf, size_t len) |
a94213b1 | 4248 | { |
4c9309c0 | 4249 | unsigned long long n; |
6791875e | 4250 | int err; |
4c9309c0 AD |
4251 | |
4252 | if (cmd_match(buf, "none")) | |
4253 | n = MaxSector; | |
4254 | else { | |
4255 | err = kstrtoull(buf, 10, &n); | |
4256 | if (err < 0) | |
4257 | return err; | |
4258 | if (n != (sector_t)n) | |
4259 | return -EINVAL; | |
4260 | } | |
a94213b1 | 4261 | |
6791875e N |
4262 | err = mddev_lock(mddev); |
4263 | if (err) | |
4264 | return err; | |
b098636c | 4265 | if (mddev->pers && !test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) |
6791875e | 4266 | err = -EBUSY; |
a94213b1 | 4267 | |
6791875e N |
4268 | if (!err) { |
4269 | mddev->recovery_cp = n; | |
4270 | if (mddev->pers) | |
2953079c | 4271 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
6791875e N |
4272 | } |
4273 | mddev_unlock(mddev); | |
4274 | return err ?: len; | |
a94213b1 N |
4275 | } |
4276 | static struct md_sysfs_entry md_resync_start = | |
750f199e N |
4277 | __ATTR_PREALLOC(resync_start, S_IRUGO|S_IWUSR, |
4278 | resync_start_show, resync_start_store); | |
a94213b1 | 4279 | |
9e653b63 N |
4280 | /* |
4281 | * The array state can be: | |
4282 | * | |
4283 | * clear | |
4284 | * No devices, no size, no level | |
4285 | * Equivalent to STOP_ARRAY ioctl | |
4286 | * inactive | |
4287 | * May have some settings, but array is not active | |
4288 | * all IO results in error | |
4289 | * When written, doesn't tear down array, but just stops it | |
4290 | * suspended (not supported yet) | |
4291 | * All IO requests will block. The array can be reconfigured. | |
910d8cb3 | 4292 | * Writing this, if accepted, will block until array is quiescent |
9e653b63 N |
4293 | * readonly |
4294 | * no resync can happen. no superblocks get written. | |
4295 | * write requests fail | |
4296 | * read-auto | |
4297 | * like readonly, but behaves like 'clean' on a write request. | |
4298 | * | |
4299 | * clean - no pending writes, but otherwise active. | |
4300 | * When written to inactive array, starts without resync | |
4301 | * If a write request arrives then | |
4302 | * if metadata is known, mark 'dirty' and switch to 'active'. | |
4303 | * if not known, block and switch to write-pending | |
4304 | * If written to an active array that has pending writes, then fails. | |
4305 | * active | |
4306 | * fully active: IO and resync can be happening. | |
4307 | * When written to inactive array, starts with resync | |
4308 | * | |
4309 | * write-pending | |
4310 | * clean, but writes are blocked waiting for 'active' to be written. | |
4311 | * | |
4312 | * active-idle | |
4313 | * like active, but no writes have been seen for a while (100msec). | |
4314 | * | |
62f7b198 | 4315 | * broken |
9631abdb MT |
4316 | * Array is failed. It's useful because mounted-arrays aren't stopped |
4317 | * when array is failed, so this state will at least alert the user that | |
4318 | * something is wrong. | |
9e653b63 N |
4319 | */ |
4320 | enum array_state { clear, inactive, suspended, readonly, read_auto, clean, active, | |
62f7b198 | 4321 | write_pending, active_idle, broken, bad_word}; |
05381954 | 4322 | static char *array_states[] = { |
9e653b63 | 4323 | "clear", "inactive", "suspended", "readonly", "read-auto", "clean", "active", |
62f7b198 | 4324 | "write-pending", "active-idle", "broken", NULL }; |
9e653b63 N |
4325 | |
4326 | static int match_word(const char *word, char **list) | |
4327 | { | |
4328 | int n; | |
4329 | for (n=0; list[n]; n++) | |
4330 | if (cmd_match(word, list[n])) | |
4331 | break; | |
4332 | return n; | |
4333 | } | |
4334 | ||
4335 | static ssize_t | |
fd01b88c | 4336 | array_state_show(struct mddev *mddev, char *page) |
9e653b63 N |
4337 | { |
4338 | enum array_state st = inactive; | |
4339 | ||
62f7b198 | 4340 | if (mddev->pers && !test_bit(MD_NOT_READY, &mddev->flags)) { |
9e653b63 N |
4341 | switch(mddev->ro) { |
4342 | case 1: | |
4343 | st = readonly; | |
4344 | break; | |
4345 | case 2: | |
4346 | st = read_auto; | |
4347 | break; | |
4348 | case 0: | |
55cc39f3 | 4349 | spin_lock(&mddev->lock); |
2953079c | 4350 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
e691063a | 4351 | st = write_pending; |
16f88949 TM |
4352 | else if (mddev->in_sync) |
4353 | st = clean; | |
9e653b63 N |
4354 | else if (mddev->safemode) |
4355 | st = active_idle; | |
4356 | else | |
4357 | st = active; | |
55cc39f3 | 4358 | spin_unlock(&mddev->lock); |
9e653b63 | 4359 | } |
62f7b198 GP |
4360 | |
4361 | if (test_bit(MD_BROKEN, &mddev->flags) && st == clean) | |
4362 | st = broken; | |
4363 | } else { | |
9e653b63 N |
4364 | if (list_empty(&mddev->disks) && |
4365 | mddev->raid_disks == 0 && | |
58c0fed4 | 4366 | mddev->dev_sectors == 0) |
9e653b63 N |
4367 | st = clear; |
4368 | else | |
4369 | st = inactive; | |
4370 | } | |
4371 | return sprintf(page, "%s\n", array_states[st]); | |
4372 | } | |
4373 | ||
f72ffdd6 N |
4374 | static int do_md_stop(struct mddev *mddev, int ro, struct block_device *bdev); |
4375 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev); | |
fd01b88c | 4376 | static int restart_array(struct mddev *mddev); |
9e653b63 N |
4377 | |
4378 | static ssize_t | |
fd01b88c | 4379 | array_state_store(struct mddev *mddev, const char *buf, size_t len) |
9e653b63 | 4380 | { |
6497709b | 4381 | int err = 0; |
9e653b63 | 4382 | enum array_state st = match_word(buf, array_states); |
6791875e N |
4383 | |
4384 | if (mddev->pers && (st == active || st == clean) && mddev->ro != 1) { | |
4385 | /* don't take reconfig_mutex when toggling between | |
4386 | * clean and active | |
4387 | */ | |
4388 | spin_lock(&mddev->lock); | |
4389 | if (st == active) { | |
4390 | restart_array(mddev); | |
2953079c | 4391 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
91a6c4ad | 4392 | md_wakeup_thread(mddev->thread); |
6791875e | 4393 | wake_up(&mddev->sb_wait); |
6791875e N |
4394 | } else /* st == clean */ { |
4395 | restart_array(mddev); | |
6497709b | 4396 | if (!set_in_sync(mddev)) |
6791875e N |
4397 | err = -EBUSY; |
4398 | } | |
573275b5 TM |
4399 | if (!err) |
4400 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
6791875e | 4401 | spin_unlock(&mddev->lock); |
c008f1d3 | 4402 | return err ?: len; |
6791875e N |
4403 | } |
4404 | err = mddev_lock(mddev); | |
4405 | if (err) | |
4406 | return err; | |
4407 | err = -EINVAL; | |
9e653b63 N |
4408 | switch(st) { |
4409 | case bad_word: | |
4410 | break; | |
4411 | case clear: | |
4412 | /* stopping an active array */ | |
a05b7ea0 | 4413 | err = do_md_stop(mddev, 0, NULL); |
9e653b63 N |
4414 | break; |
4415 | case inactive: | |
4416 | /* stopping an active array */ | |
90cf195d | 4417 | if (mddev->pers) |
a05b7ea0 | 4418 | err = do_md_stop(mddev, 2, NULL); |
90cf195d | 4419 | else |
e691063a | 4420 | err = 0; /* already inactive */ |
9e653b63 N |
4421 | break; |
4422 | case suspended: | |
4423 | break; /* not supported yet */ | |
4424 | case readonly: | |
4425 | if (mddev->pers) | |
a05b7ea0 | 4426 | err = md_set_readonly(mddev, NULL); |
9e653b63 N |
4427 | else { |
4428 | mddev->ro = 1; | |
648b629e | 4429 | set_disk_ro(mddev->gendisk, 1); |
9e653b63 N |
4430 | err = do_md_run(mddev); |
4431 | } | |
4432 | break; | |
4433 | case read_auto: | |
9e653b63 | 4434 | if (mddev->pers) { |
80268ee9 | 4435 | if (mddev->ro == 0) |
a05b7ea0 | 4436 | err = md_set_readonly(mddev, NULL); |
80268ee9 | 4437 | else if (mddev->ro == 1) |
648b629e N |
4438 | err = restart_array(mddev); |
4439 | if (err == 0) { | |
4440 | mddev->ro = 2; | |
4441 | set_disk_ro(mddev->gendisk, 0); | |
4442 | } | |
9e653b63 N |
4443 | } else { |
4444 | mddev->ro = 2; | |
4445 | err = do_md_run(mddev); | |
4446 | } | |
4447 | break; | |
4448 | case clean: | |
4449 | if (mddev->pers) { | |
339421de SL |
4450 | err = restart_array(mddev); |
4451 | if (err) | |
4452 | break; | |
85572d7c | 4453 | spin_lock(&mddev->lock); |
6497709b | 4454 | if (!set_in_sync(mddev)) |
e691063a | 4455 | err = -EBUSY; |
85572d7c | 4456 | spin_unlock(&mddev->lock); |
5bf29597 N |
4457 | } else |
4458 | err = -EINVAL; | |
9e653b63 N |
4459 | break; |
4460 | case active: | |
4461 | if (mddev->pers) { | |
339421de SL |
4462 | err = restart_array(mddev); |
4463 | if (err) | |
4464 | break; | |
2953079c | 4465 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
9e653b63 N |
4466 | wake_up(&mddev->sb_wait); |
4467 | err = 0; | |
4468 | } else { | |
4469 | mddev->ro = 0; | |
648b629e | 4470 | set_disk_ro(mddev->gendisk, 0); |
9e653b63 N |
4471 | err = do_md_run(mddev); |
4472 | } | |
4473 | break; | |
4474 | case write_pending: | |
4475 | case active_idle: | |
62f7b198 | 4476 | case broken: |
9e653b63 N |
4477 | /* these cannot be set */ |
4478 | break; | |
4479 | } | |
6791875e N |
4480 | |
4481 | if (!err) { | |
1d23f178 N |
4482 | if (mddev->hold_active == UNTIL_IOCTL) |
4483 | mddev->hold_active = 0; | |
00bcb4ac | 4484 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 4485 | } |
6791875e N |
4486 | mddev_unlock(mddev); |
4487 | return err ?: len; | |
9e653b63 | 4488 | } |
80ca3a44 | 4489 | static struct md_sysfs_entry md_array_state = |
750f199e | 4490 | __ATTR_PREALLOC(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store); |
9e653b63 | 4491 | |
1e50915f | 4492 | static ssize_t |
fd01b88c | 4493 | max_corrected_read_errors_show(struct mddev *mddev, char *page) { |
1e50915f RB |
4494 | return sprintf(page, "%d\n", |
4495 | atomic_read(&mddev->max_corr_read_errors)); | |
4496 | } | |
4497 | ||
4498 | static ssize_t | |
fd01b88c | 4499 | max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len) |
1e50915f | 4500 | { |
4c9309c0 AD |
4501 | unsigned int n; |
4502 | int rv; | |
1e50915f | 4503 | |
4c9309c0 AD |
4504 | rv = kstrtouint(buf, 10, &n); |
4505 | if (rv < 0) | |
4506 | return rv; | |
4507 | atomic_set(&mddev->max_corr_read_errors, n); | |
4508 | return len; | |
1e50915f RB |
4509 | } |
4510 | ||
4511 | static struct md_sysfs_entry max_corr_read_errors = | |
4512 | __ATTR(max_read_errors, S_IRUGO|S_IWUSR, max_corrected_read_errors_show, | |
4513 | max_corrected_read_errors_store); | |
4514 | ||
6d7ff738 | 4515 | static ssize_t |
fd01b88c | 4516 | null_show(struct mddev *mddev, char *page) |
6d7ff738 N |
4517 | { |
4518 | return -EINVAL; | |
4519 | } | |
4520 | ||
cc1ffe61 GJ |
4521 | /* need to ensure rdev_delayed_delete() has completed */ |
4522 | static void flush_rdev_wq(struct mddev *mddev) | |
4523 | { | |
4524 | struct md_rdev *rdev; | |
4525 | ||
4526 | rcu_read_lock(); | |
4527 | rdev_for_each_rcu(rdev, mddev) | |
4528 | if (work_pending(&rdev->del_work)) { | |
4529 | flush_workqueue(md_rdev_misc_wq); | |
4530 | break; | |
4531 | } | |
4532 | rcu_read_unlock(); | |
4533 | } | |
4534 | ||
6d7ff738 | 4535 | static ssize_t |
fd01b88c | 4536 | new_dev_store(struct mddev *mddev, const char *buf, size_t len) |
6d7ff738 N |
4537 | { |
4538 | /* buf must be %d:%d\n? giving major and minor numbers */ | |
4539 | /* The new device is added to the array. | |
4540 | * If the array has a persistent superblock, we read the | |
4541 | * superblock to initialise info and check validity. | |
4542 | * Otherwise, only checking done is that in bind_rdev_to_array, | |
4543 | * which mainly checks size. | |
4544 | */ | |
4545 | char *e; | |
4546 | int major = simple_strtoul(buf, &e, 10); | |
4547 | int minor; | |
4548 | dev_t dev; | |
3cb03002 | 4549 | struct md_rdev *rdev; |
6d7ff738 N |
4550 | int err; |
4551 | ||
4552 | if (!*buf || *e != ':' || !e[1] || e[1] == '\n') | |
4553 | return -EINVAL; | |
4554 | minor = simple_strtoul(e+1, &e, 10); | |
4555 | if (*e && *e != '\n') | |
4556 | return -EINVAL; | |
4557 | dev = MKDEV(major, minor); | |
4558 | if (major != MAJOR(dev) || | |
4559 | minor != MINOR(dev)) | |
4560 | return -EOVERFLOW; | |
4561 | ||
cc1ffe61 | 4562 | flush_rdev_wq(mddev); |
6791875e N |
4563 | err = mddev_lock(mddev); |
4564 | if (err) | |
4565 | return err; | |
6d7ff738 N |
4566 | if (mddev->persistent) { |
4567 | rdev = md_import_device(dev, mddev->major_version, | |
4568 | mddev->minor_version); | |
4569 | if (!IS_ERR(rdev) && !list_empty(&mddev->disks)) { | |
3cb03002 N |
4570 | struct md_rdev *rdev0 |
4571 | = list_entry(mddev->disks.next, | |
4572 | struct md_rdev, same_set); | |
6d7ff738 N |
4573 | err = super_types[mddev->major_version] |
4574 | .load_super(rdev, rdev0, mddev->minor_version); | |
4575 | if (err < 0) | |
4576 | goto out; | |
4577 | } | |
c5d79adb N |
4578 | } else if (mddev->external) |
4579 | rdev = md_import_device(dev, -2, -1); | |
4580 | else | |
6d7ff738 N |
4581 | rdev = md_import_device(dev, -1, -1); |
4582 | ||
9a8c0fa8 N |
4583 | if (IS_ERR(rdev)) { |
4584 | mddev_unlock(mddev); | |
6d7ff738 | 4585 | return PTR_ERR(rdev); |
9a8c0fa8 | 4586 | } |
6d7ff738 N |
4587 | err = bind_rdev_to_array(rdev, mddev); |
4588 | out: | |
4589 | if (err) | |
4590 | export_rdev(rdev); | |
6791875e | 4591 | mddev_unlock(mddev); |
5492c46e | 4592 | if (!err) |
54679486 | 4593 | md_new_event(); |
6d7ff738 N |
4594 | return err ? err : len; |
4595 | } | |
4596 | ||
4597 | static struct md_sysfs_entry md_new_device = | |
80ca3a44 | 4598 | __ATTR(new_dev, S_IWUSR, null_show, new_dev_store); |
3b34380a | 4599 | |
9b1d1dac | 4600 | static ssize_t |
fd01b88c | 4601 | bitmap_store(struct mddev *mddev, const char *buf, size_t len) |
9b1d1dac PC |
4602 | { |
4603 | char *end; | |
4604 | unsigned long chunk, end_chunk; | |
6791875e | 4605 | int err; |
9b1d1dac | 4606 | |
6791875e N |
4607 | err = mddev_lock(mddev); |
4608 | if (err) | |
4609 | return err; | |
9b1d1dac PC |
4610 | if (!mddev->bitmap) |
4611 | goto out; | |
4612 | /* buf should be <chunk> <chunk> ... or <chunk>-<chunk> ... (range) */ | |
4613 | while (*buf) { | |
4614 | chunk = end_chunk = simple_strtoul(buf, &end, 0); | |
4615 | if (buf == end) break; | |
4616 | if (*end == '-') { /* range */ | |
4617 | buf = end + 1; | |
4618 | end_chunk = simple_strtoul(buf, &end, 0); | |
4619 | if (buf == end) break; | |
4620 | } | |
4621 | if (*end && !isspace(*end)) break; | |
e64e4018 | 4622 | md_bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk); |
e7d2860b | 4623 | buf = skip_spaces(end); |
9b1d1dac | 4624 | } |
e64e4018 | 4625 | md_bitmap_unplug(mddev->bitmap); /* flush the bits to disk */ |
9b1d1dac | 4626 | out: |
6791875e | 4627 | mddev_unlock(mddev); |
9b1d1dac PC |
4628 | return len; |
4629 | } | |
4630 | ||
4631 | static struct md_sysfs_entry md_bitmap = | |
4632 | __ATTR(bitmap_set_bits, S_IWUSR, null_show, bitmap_store); | |
4633 | ||
a35b0d69 | 4634 | static ssize_t |
fd01b88c | 4635 | size_show(struct mddev *mddev, char *page) |
a35b0d69 | 4636 | { |
58c0fed4 AN |
4637 | return sprintf(page, "%llu\n", |
4638 | (unsigned long long)mddev->dev_sectors / 2); | |
a35b0d69 N |
4639 | } |
4640 | ||
fd01b88c | 4641 | static int update_size(struct mddev *mddev, sector_t num_sectors); |
a35b0d69 N |
4642 | |
4643 | static ssize_t | |
fd01b88c | 4644 | size_store(struct mddev *mddev, const char *buf, size_t len) |
a35b0d69 N |
4645 | { |
4646 | /* If array is inactive, we can reduce the component size, but | |
4647 | * not increase it (except from 0). | |
4648 | * If array is active, we can try an on-line resize | |
4649 | */ | |
b522adcd DW |
4650 | sector_t sectors; |
4651 | int err = strict_blocks_to_sectors(buf, §ors); | |
a35b0d69 | 4652 | |
58c0fed4 AN |
4653 | if (err < 0) |
4654 | return err; | |
6791875e N |
4655 | err = mddev_lock(mddev); |
4656 | if (err) | |
4657 | return err; | |
a35b0d69 | 4658 | if (mddev->pers) { |
58c0fed4 | 4659 | err = update_size(mddev, sectors); |
4ba1e788 XN |
4660 | if (err == 0) |
4661 | md_update_sb(mddev, 1); | |
a35b0d69 | 4662 | } else { |
58c0fed4 AN |
4663 | if (mddev->dev_sectors == 0 || |
4664 | mddev->dev_sectors > sectors) | |
4665 | mddev->dev_sectors = sectors; | |
a35b0d69 N |
4666 | else |
4667 | err = -ENOSPC; | |
4668 | } | |
6791875e | 4669 | mddev_unlock(mddev); |
a35b0d69 N |
4670 | return err ? err : len; |
4671 | } | |
4672 | ||
4673 | static struct md_sysfs_entry md_size = | |
80ca3a44 | 4674 | __ATTR(component_size, S_IRUGO|S_IWUSR, size_show, size_store); |
a35b0d69 | 4675 | |
83f0d77a | 4676 | /* Metadata version. |
e691063a N |
4677 | * This is one of |
4678 | * 'none' for arrays with no metadata (good luck...) | |
4679 | * 'external' for arrays with externally managed metadata, | |
8bb93aac N |
4680 | * or N.M for internally known formats |
4681 | */ | |
4682 | static ssize_t | |
fd01b88c | 4683 | metadata_show(struct mddev *mddev, char *page) |
8bb93aac N |
4684 | { |
4685 | if (mddev->persistent) | |
4686 | return sprintf(page, "%d.%d\n", | |
4687 | mddev->major_version, mddev->minor_version); | |
e691063a N |
4688 | else if (mddev->external) |
4689 | return sprintf(page, "external:%s\n", mddev->metadata_type); | |
8bb93aac N |
4690 | else |
4691 | return sprintf(page, "none\n"); | |
4692 | } | |
4693 | ||
4694 | static ssize_t | |
fd01b88c | 4695 | metadata_store(struct mddev *mddev, const char *buf, size_t len) |
8bb93aac N |
4696 | { |
4697 | int major, minor; | |
4698 | char *e; | |
6791875e | 4699 | int err; |
ea43ddd8 N |
4700 | /* Changing the details of 'external' metadata is |
4701 | * always permitted. Otherwise there must be | |
4702 | * no devices attached to the array. | |
4703 | */ | |
6791875e N |
4704 | |
4705 | err = mddev_lock(mddev); | |
4706 | if (err) | |
4707 | return err; | |
4708 | err = -EBUSY; | |
ea43ddd8 N |
4709 | if (mddev->external && strncmp(buf, "external:", 9) == 0) |
4710 | ; | |
4711 | else if (!list_empty(&mddev->disks)) | |
6791875e | 4712 | goto out_unlock; |
8bb93aac | 4713 | |
6791875e | 4714 | err = 0; |
8bb93aac N |
4715 | if (cmd_match(buf, "none")) { |
4716 | mddev->persistent = 0; | |
e691063a N |
4717 | mddev->external = 0; |
4718 | mddev->major_version = 0; | |
4719 | mddev->minor_version = 90; | |
6791875e | 4720 | goto out_unlock; |
e691063a N |
4721 | } |
4722 | if (strncmp(buf, "external:", 9) == 0) { | |
20a49ff6 | 4723 | size_t namelen = len-9; |
e691063a N |
4724 | if (namelen >= sizeof(mddev->metadata_type)) |
4725 | namelen = sizeof(mddev->metadata_type)-1; | |
4726 | strncpy(mddev->metadata_type, buf+9, namelen); | |
4727 | mddev->metadata_type[namelen] = 0; | |
4728 | if (namelen && mddev->metadata_type[namelen-1] == '\n') | |
4729 | mddev->metadata_type[--namelen] = 0; | |
4730 | mddev->persistent = 0; | |
4731 | mddev->external = 1; | |
8bb93aac N |
4732 | mddev->major_version = 0; |
4733 | mddev->minor_version = 90; | |
6791875e | 4734 | goto out_unlock; |
8bb93aac N |
4735 | } |
4736 | major = simple_strtoul(buf, &e, 10); | |
6791875e | 4737 | err = -EINVAL; |
8bb93aac | 4738 | if (e==buf || *e != '.') |
6791875e | 4739 | goto out_unlock; |
8bb93aac N |
4740 | buf = e+1; |
4741 | minor = simple_strtoul(buf, &e, 10); | |
3f9d7b0d | 4742 | if (e==buf || (*e && *e != '\n') ) |
6791875e N |
4743 | goto out_unlock; |
4744 | err = -ENOENT; | |
50511da3 | 4745 | if (major >= ARRAY_SIZE(super_types) || super_types[major].name == NULL) |
6791875e | 4746 | goto out_unlock; |
8bb93aac N |
4747 | mddev->major_version = major; |
4748 | mddev->minor_version = minor; | |
4749 | mddev->persistent = 1; | |
e691063a | 4750 | mddev->external = 0; |
6791875e N |
4751 | err = 0; |
4752 | out_unlock: | |
4753 | mddev_unlock(mddev); | |
4754 | return err ?: len; | |
8bb93aac N |
4755 | } |
4756 | ||
4757 | static struct md_sysfs_entry md_metadata = | |
750f199e | 4758 | __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store); |
8bb93aac | 4759 | |
24dd469d | 4760 | static ssize_t |
fd01b88c | 4761 | action_show(struct mddev *mddev, char *page) |
24dd469d | 4762 | { |
7eec314d | 4763 | char *type = "idle"; |
b7b17c9b N |
4764 | unsigned long recovery = mddev->recovery; |
4765 | if (test_bit(MD_RECOVERY_FROZEN, &recovery)) | |
b6a9ce68 | 4766 | type = "frozen"; |
b7b17c9b N |
4767 | else if (test_bit(MD_RECOVERY_RUNNING, &recovery) || |
4768 | (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &recovery))) { | |
4769 | if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) | |
ccfcc3c1 | 4770 | type = "reshape"; |
b7b17c9b N |
4771 | else if (test_bit(MD_RECOVERY_SYNC, &recovery)) { |
4772 | if (!test_bit(MD_RECOVERY_REQUESTED, &recovery)) | |
24dd469d | 4773 | type = "resync"; |
b7b17c9b | 4774 | else if (test_bit(MD_RECOVERY_CHECK, &recovery)) |
24dd469d N |
4775 | type = "check"; |
4776 | else | |
4777 | type = "repair"; | |
b7b17c9b | 4778 | } else if (test_bit(MD_RECOVERY_RECOVER, &recovery)) |
24dd469d | 4779 | type = "recover"; |
985ca973 N |
4780 | else if (mddev->reshape_position != MaxSector) |
4781 | type = "reshape"; | |
24dd469d N |
4782 | } |
4783 | return sprintf(page, "%s\n", type); | |
4784 | } | |
4785 | ||
4786 | static ssize_t | |
fd01b88c | 4787 | action_store(struct mddev *mddev, const char *page, size_t len) |
24dd469d | 4788 | { |
7eec314d N |
4789 | if (!mddev->pers || !mddev->pers->sync_request) |
4790 | return -EINVAL; | |
4791 | ||
b6a9ce68 N |
4792 | |
4793 | if (cmd_match(page, "idle") || cmd_match(page, "frozen")) { | |
56ccc112 N |
4794 | if (cmd_match(page, "frozen")) |
4795 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4796 | else | |
4797 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
8e8e2518 N |
4798 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
4799 | mddev_lock(mddev) == 0) { | |
cc1ffe61 GJ |
4800 | if (work_pending(&mddev->del_work)) |
4801 | flush_workqueue(md_misc_wq); | |
8e8e2518 | 4802 | if (mddev->sync_thread) { |
9dfbdafd GJ |
4803 | sector_t save_rp = mddev->reshape_position; |
4804 | ||
4805 | mddev_unlock(mddev); | |
4806 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
4807 | md_unregister_thread(&mddev->sync_thread); | |
4808 | mddev_lock_nointr(mddev); | |
4809 | /* | |
4810 | * set RECOVERY_INTR again and restore reshape | |
4811 | * position in case others changed them after | |
4812 | * got lock, eg, reshape_position_store and | |
4813 | * md_check_recovery. | |
4814 | */ | |
4815 | mddev->reshape_position = save_rp; | |
8e8e2518 | 4816 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
d0a18034 | 4817 | md_reap_sync_thread(mddev); |
6791875e | 4818 | } |
8e8e2518 | 4819 | mddev_unlock(mddev); |
7eec314d | 4820 | } |
312045ee | 4821 | } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
24dd469d | 4822 | return -EBUSY; |
72a23c21 | 4823 | else if (cmd_match(page, "resync")) |
56ccc112 | 4824 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4825 | else if (cmd_match(page, "recover")) { |
56ccc112 | 4826 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4827 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
72a23c21 | 4828 | } else if (cmd_match(page, "reshape")) { |
16484bf5 N |
4829 | int err; |
4830 | if (mddev->pers->start_reshape == NULL) | |
4831 | return -EINVAL; | |
6791875e N |
4832 | err = mddev_lock(mddev); |
4833 | if (!err) { | |
312045ee N |
4834 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4835 | err = -EBUSY; | |
4836 | else { | |
4837 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4838 | err = mddev->pers->start_reshape(mddev); | |
4839 | } | |
6791875e N |
4840 | mddev_unlock(mddev); |
4841 | } | |
16484bf5 N |
4842 | if (err) |
4843 | return err; | |
e1a86dbb | 4844 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
16484bf5 | 4845 | } else { |
bce74dac | 4846 | if (cmd_match(page, "check")) |
7eec314d | 4847 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
2adc7d47 | 4848 | else if (!cmd_match(page, "repair")) |
7eec314d | 4849 | return -EINVAL; |
56ccc112 | 4850 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
7eec314d N |
4851 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
4852 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
7eec314d | 4853 | } |
48c26ddc N |
4854 | if (mddev->ro == 2) { |
4855 | /* A write to sync_action is enough to justify | |
4856 | * canceling read-auto mode | |
4857 | */ | |
4858 | mddev->ro = 0; | |
4859 | md_wakeup_thread(mddev->sync_thread); | |
4860 | } | |
03c902e1 | 4861 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
24dd469d | 4862 | md_wakeup_thread(mddev->thread); |
00bcb4ac | 4863 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
24dd469d N |
4864 | return len; |
4865 | } | |
4866 | ||
c4a39551 | 4867 | static struct md_sysfs_entry md_scan_mode = |
750f199e | 4868 | __ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store); |
c4a39551 JB |
4869 | |
4870 | static ssize_t | |
4871 | last_sync_action_show(struct mddev *mddev, char *page) | |
4872 | { | |
4873 | return sprintf(page, "%s\n", mddev->last_sync_action); | |
4874 | } | |
4875 | ||
4876 | static struct md_sysfs_entry md_last_scan_mode = __ATTR_RO(last_sync_action); | |
4877 | ||
9d88883e | 4878 | static ssize_t |
fd01b88c | 4879 | mismatch_cnt_show(struct mddev *mddev, char *page) |
9d88883e N |
4880 | { |
4881 | return sprintf(page, "%llu\n", | |
7f7583d4 JM |
4882 | (unsigned long long) |
4883 | atomic64_read(&mddev->resync_mismatches)); | |
9d88883e N |
4884 | } |
4885 | ||
80ca3a44 | 4886 | static struct md_sysfs_entry md_mismatches = __ATTR_RO(mismatch_cnt); |
9d88883e | 4887 | |
88202a0c | 4888 | static ssize_t |
fd01b88c | 4889 | sync_min_show(struct mddev *mddev, char *page) |
88202a0c N |
4890 | { |
4891 | return sprintf(page, "%d (%s)\n", speed_min(mddev), | |
4892 | mddev->sync_speed_min ? "local": "system"); | |
4893 | } | |
4894 | ||
4895 | static ssize_t | |
fd01b88c | 4896 | sync_min_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4897 | { |
4c9309c0 AD |
4898 | unsigned int min; |
4899 | int rv; | |
4900 | ||
88202a0c | 4901 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4902 | min = 0; |
4903 | } else { | |
4904 | rv = kstrtouint(buf, 10, &min); | |
4905 | if (rv < 0) | |
4906 | return rv; | |
4907 | if (min == 0) | |
4908 | return -EINVAL; | |
88202a0c | 4909 | } |
88202a0c N |
4910 | mddev->sync_speed_min = min; |
4911 | return len; | |
4912 | } | |
4913 | ||
4914 | static struct md_sysfs_entry md_sync_min = | |
4915 | __ATTR(sync_speed_min, S_IRUGO|S_IWUSR, sync_min_show, sync_min_store); | |
4916 | ||
4917 | static ssize_t | |
fd01b88c | 4918 | sync_max_show(struct mddev *mddev, char *page) |
88202a0c N |
4919 | { |
4920 | return sprintf(page, "%d (%s)\n", speed_max(mddev), | |
4921 | mddev->sync_speed_max ? "local": "system"); | |
4922 | } | |
4923 | ||
4924 | static ssize_t | |
fd01b88c | 4925 | sync_max_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4926 | { |
4c9309c0 AD |
4927 | unsigned int max; |
4928 | int rv; | |
4929 | ||
88202a0c | 4930 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4931 | max = 0; |
4932 | } else { | |
4933 | rv = kstrtouint(buf, 10, &max); | |
4934 | if (rv < 0) | |
4935 | return rv; | |
4936 | if (max == 0) | |
4937 | return -EINVAL; | |
88202a0c | 4938 | } |
88202a0c N |
4939 | mddev->sync_speed_max = max; |
4940 | return len; | |
4941 | } | |
4942 | ||
4943 | static struct md_sysfs_entry md_sync_max = | |
4944 | __ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store); | |
4945 | ||
d7f3d291 | 4946 | static ssize_t |
fd01b88c | 4947 | degraded_show(struct mddev *mddev, char *page) |
d7f3d291 IP |
4948 | { |
4949 | return sprintf(page, "%d\n", mddev->degraded); | |
4950 | } | |
4951 | static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded); | |
88202a0c | 4952 | |
90b08710 | 4953 | static ssize_t |
fd01b88c | 4954 | sync_force_parallel_show(struct mddev *mddev, char *page) |
90b08710 BS |
4955 | { |
4956 | return sprintf(page, "%d\n", mddev->parallel_resync); | |
4957 | } | |
4958 | ||
4959 | static ssize_t | |
fd01b88c | 4960 | sync_force_parallel_store(struct mddev *mddev, const char *buf, size_t len) |
90b08710 BS |
4961 | { |
4962 | long n; | |
4963 | ||
b29bebd6 | 4964 | if (kstrtol(buf, 10, &n)) |
90b08710 BS |
4965 | return -EINVAL; |
4966 | ||
4967 | if (n != 0 && n != 1) | |
4968 | return -EINVAL; | |
4969 | ||
4970 | mddev->parallel_resync = n; | |
4971 | ||
4972 | if (mddev->sync_thread) | |
4973 | wake_up(&resync_wait); | |
4974 | ||
4975 | return len; | |
4976 | } | |
4977 | ||
4978 | /* force parallel resync, even with shared block devices */ | |
4979 | static struct md_sysfs_entry md_sync_force_parallel = | |
4980 | __ATTR(sync_force_parallel, S_IRUGO|S_IWUSR, | |
4981 | sync_force_parallel_show, sync_force_parallel_store); | |
4982 | ||
88202a0c | 4983 | static ssize_t |
fd01b88c | 4984 | sync_speed_show(struct mddev *mddev, char *page) |
88202a0c N |
4985 | { |
4986 | unsigned long resync, dt, db; | |
eac58d08 | 4987 | if (mddev->curr_resync == MD_RESYNC_NONE) |
d1a7c503 | 4988 | return sprintf(page, "none\n"); |
9687a60c AN |
4989 | resync = mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active); |
4990 | dt = (jiffies - mddev->resync_mark) / HZ; | |
88202a0c | 4991 | if (!dt) dt++; |
9687a60c AN |
4992 | db = resync - mddev->resync_mark_cnt; |
4993 | return sprintf(page, "%lu\n", db/dt/2); /* K/sec */ | |
88202a0c N |
4994 | } |
4995 | ||
80ca3a44 | 4996 | static struct md_sysfs_entry md_sync_speed = __ATTR_RO(sync_speed); |
88202a0c N |
4997 | |
4998 | static ssize_t | |
fd01b88c | 4999 | sync_completed_show(struct mddev *mddev, char *page) |
88202a0c | 5000 | { |
13ae864b | 5001 | unsigned long long max_sectors, resync; |
88202a0c | 5002 | |
acb180b0 N |
5003 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
5004 | return sprintf(page, "none\n"); | |
5005 | ||
eac58d08 LG |
5006 | if (mddev->curr_resync == MD_RESYNC_YIELDED || |
5007 | mddev->curr_resync == MD_RESYNC_DELAYED) | |
72f36d59 N |
5008 | return sprintf(page, "delayed\n"); |
5009 | ||
c804cdec N |
5010 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
5011 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
58c0fed4 | 5012 | max_sectors = mddev->resync_max_sectors; |
88202a0c | 5013 | else |
58c0fed4 | 5014 | max_sectors = mddev->dev_sectors; |
88202a0c | 5015 | |
acb180b0 | 5016 | resync = mddev->curr_resync_completed; |
13ae864b | 5017 | return sprintf(page, "%llu / %llu\n", resync, max_sectors); |
88202a0c N |
5018 | } |
5019 | ||
750f199e N |
5020 | static struct md_sysfs_entry md_sync_completed = |
5021 | __ATTR_PREALLOC(sync_completed, S_IRUGO, sync_completed_show, NULL); | |
88202a0c | 5022 | |
5e96ee65 | 5023 | static ssize_t |
fd01b88c | 5024 | min_sync_show(struct mddev *mddev, char *page) |
5e96ee65 NB |
5025 | { |
5026 | return sprintf(page, "%llu\n", | |
5027 | (unsigned long long)mddev->resync_min); | |
5028 | } | |
5029 | static ssize_t | |
fd01b88c | 5030 | min_sync_store(struct mddev *mddev, const char *buf, size_t len) |
5e96ee65 NB |
5031 | { |
5032 | unsigned long long min; | |
23da422b | 5033 | int err; |
23da422b | 5034 | |
b29bebd6 | 5035 | if (kstrtoull(buf, 10, &min)) |
5e96ee65 | 5036 | return -EINVAL; |
23da422b N |
5037 | |
5038 | spin_lock(&mddev->lock); | |
5039 | err = -EINVAL; | |
5e96ee65 | 5040 | if (min > mddev->resync_max) |
23da422b N |
5041 | goto out_unlock; |
5042 | ||
5043 | err = -EBUSY; | |
5e96ee65 | 5044 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 5045 | goto out_unlock; |
5e96ee65 | 5046 | |
50c37b13 N |
5047 | /* Round down to multiple of 4K for safety */ |
5048 | mddev->resync_min = round_down(min, 8); | |
23da422b | 5049 | err = 0; |
5e96ee65 | 5050 | |
23da422b N |
5051 | out_unlock: |
5052 | spin_unlock(&mddev->lock); | |
5053 | return err ?: len; | |
5e96ee65 NB |
5054 | } |
5055 | ||
5056 | static struct md_sysfs_entry md_min_sync = | |
5057 | __ATTR(sync_min, S_IRUGO|S_IWUSR, min_sync_show, min_sync_store); | |
5058 | ||
c6207277 | 5059 | static ssize_t |
fd01b88c | 5060 | max_sync_show(struct mddev *mddev, char *page) |
c6207277 N |
5061 | { |
5062 | if (mddev->resync_max == MaxSector) | |
5063 | return sprintf(page, "max\n"); | |
5064 | else | |
5065 | return sprintf(page, "%llu\n", | |
5066 | (unsigned long long)mddev->resync_max); | |
5067 | } | |
5068 | static ssize_t | |
fd01b88c | 5069 | max_sync_store(struct mddev *mddev, const char *buf, size_t len) |
c6207277 | 5070 | { |
23da422b N |
5071 | int err; |
5072 | spin_lock(&mddev->lock); | |
c6207277 N |
5073 | if (strncmp(buf, "max", 3) == 0) |
5074 | mddev->resync_max = MaxSector; | |
5075 | else { | |
5e96ee65 | 5076 | unsigned long long max; |
23da422b N |
5077 | int chunk; |
5078 | ||
5079 | err = -EINVAL; | |
b29bebd6 | 5080 | if (kstrtoull(buf, 10, &max)) |
23da422b | 5081 | goto out_unlock; |
5e96ee65 | 5082 | if (max < mddev->resync_min) |
23da422b N |
5083 | goto out_unlock; |
5084 | ||
5085 | err = -EBUSY; | |
c6207277 | 5086 | if (max < mddev->resync_max && |
4d484a4a | 5087 | mddev->ro == 0 && |
c6207277 | 5088 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 5089 | goto out_unlock; |
c6207277 N |
5090 | |
5091 | /* Must be a multiple of chunk_size */ | |
23da422b N |
5092 | chunk = mddev->chunk_sectors; |
5093 | if (chunk) { | |
2ac06c33 | 5094 | sector_t temp = max; |
23da422b N |
5095 | |
5096 | err = -EINVAL; | |
5097 | if (sector_div(temp, chunk)) | |
5098 | goto out_unlock; | |
c6207277 N |
5099 | } |
5100 | mddev->resync_max = max; | |
5101 | } | |
5102 | wake_up(&mddev->recovery_wait); | |
23da422b N |
5103 | err = 0; |
5104 | out_unlock: | |
5105 | spin_unlock(&mddev->lock); | |
5106 | return err ?: len; | |
c6207277 N |
5107 | } |
5108 | ||
5109 | static struct md_sysfs_entry md_max_sync = | |
5110 | __ATTR(sync_max, S_IRUGO|S_IWUSR, max_sync_show, max_sync_store); | |
5111 | ||
e464eafd | 5112 | static ssize_t |
fd01b88c | 5113 | suspend_lo_show(struct mddev *mddev, char *page) |
e464eafd N |
5114 | { |
5115 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_lo); | |
5116 | } | |
5117 | ||
5118 | static ssize_t | |
fd01b88c | 5119 | suspend_lo_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5120 | { |
b03e0ccb | 5121 | unsigned long long new; |
6791875e | 5122 | int err; |
e464eafd | 5123 | |
4c9309c0 AD |
5124 | err = kstrtoull(buf, 10, &new); |
5125 | if (err < 0) | |
5126 | return err; | |
5127 | if (new != (sector_t)new) | |
e464eafd | 5128 | return -EINVAL; |
23ddff37 | 5129 | |
6791875e N |
5130 | err = mddev_lock(mddev); |
5131 | if (err) | |
5132 | return err; | |
5133 | err = -EINVAL; | |
5134 | if (mddev->pers == NULL || | |
5135 | mddev->pers->quiesce == NULL) | |
5136 | goto unlock; | |
b03e0ccb | 5137 | mddev_suspend(mddev); |
23ddff37 | 5138 | mddev->suspend_lo = new; |
b03e0ccb N |
5139 | mddev_resume(mddev); |
5140 | ||
6791875e N |
5141 | err = 0; |
5142 | unlock: | |
5143 | mddev_unlock(mddev); | |
5144 | return err ?: len; | |
e464eafd N |
5145 | } |
5146 | static struct md_sysfs_entry md_suspend_lo = | |
5147 | __ATTR(suspend_lo, S_IRUGO|S_IWUSR, suspend_lo_show, suspend_lo_store); | |
5148 | ||
e464eafd | 5149 | static ssize_t |
fd01b88c | 5150 | suspend_hi_show(struct mddev *mddev, char *page) |
e464eafd N |
5151 | { |
5152 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_hi); | |
5153 | } | |
5154 | ||
5155 | static ssize_t | |
fd01b88c | 5156 | suspend_hi_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5157 | { |
b03e0ccb | 5158 | unsigned long long new; |
6791875e | 5159 | int err; |
e464eafd | 5160 | |
4c9309c0 AD |
5161 | err = kstrtoull(buf, 10, &new); |
5162 | if (err < 0) | |
5163 | return err; | |
5164 | if (new != (sector_t)new) | |
e464eafd | 5165 | return -EINVAL; |
23ddff37 | 5166 | |
6791875e N |
5167 | err = mddev_lock(mddev); |
5168 | if (err) | |
5169 | return err; | |
5170 | err = -EINVAL; | |
b03e0ccb | 5171 | if (mddev->pers == NULL) |
6791875e | 5172 | goto unlock; |
b03e0ccb N |
5173 | |
5174 | mddev_suspend(mddev); | |
23ddff37 | 5175 | mddev->suspend_hi = new; |
b03e0ccb N |
5176 | mddev_resume(mddev); |
5177 | ||
6791875e N |
5178 | err = 0; |
5179 | unlock: | |
5180 | mddev_unlock(mddev); | |
5181 | return err ?: len; | |
e464eafd N |
5182 | } |
5183 | static struct md_sysfs_entry md_suspend_hi = | |
5184 | __ATTR(suspend_hi, S_IRUGO|S_IWUSR, suspend_hi_show, suspend_hi_store); | |
5185 | ||
08a02ecd | 5186 | static ssize_t |
fd01b88c | 5187 | reshape_position_show(struct mddev *mddev, char *page) |
08a02ecd N |
5188 | { |
5189 | if (mddev->reshape_position != MaxSector) | |
5190 | return sprintf(page, "%llu\n", | |
5191 | (unsigned long long)mddev->reshape_position); | |
5192 | strcpy(page, "none\n"); | |
5193 | return 5; | |
5194 | } | |
5195 | ||
5196 | static ssize_t | |
fd01b88c | 5197 | reshape_position_store(struct mddev *mddev, const char *buf, size_t len) |
08a02ecd | 5198 | { |
c6563a8c | 5199 | struct md_rdev *rdev; |
4c9309c0 | 5200 | unsigned long long new; |
6791875e | 5201 | int err; |
6791875e | 5202 | |
4c9309c0 AD |
5203 | err = kstrtoull(buf, 10, &new); |
5204 | if (err < 0) | |
5205 | return err; | |
5206 | if (new != (sector_t)new) | |
08a02ecd | 5207 | return -EINVAL; |
6791875e N |
5208 | err = mddev_lock(mddev); |
5209 | if (err) | |
5210 | return err; | |
5211 | err = -EBUSY; | |
5212 | if (mddev->pers) | |
5213 | goto unlock; | |
08a02ecd N |
5214 | mddev->reshape_position = new; |
5215 | mddev->delta_disks = 0; | |
2c810cdd | 5216 | mddev->reshape_backwards = 0; |
08a02ecd N |
5217 | mddev->new_level = mddev->level; |
5218 | mddev->new_layout = mddev->layout; | |
664e7c41 | 5219 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
c6563a8c N |
5220 | rdev_for_each(rdev, mddev) |
5221 | rdev->new_data_offset = rdev->data_offset; | |
6791875e N |
5222 | err = 0; |
5223 | unlock: | |
5224 | mddev_unlock(mddev); | |
5225 | return err ?: len; | |
08a02ecd N |
5226 | } |
5227 | ||
5228 | static struct md_sysfs_entry md_reshape_position = | |
5229 | __ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show, | |
5230 | reshape_position_store); | |
5231 | ||
2c810cdd N |
5232 | static ssize_t |
5233 | reshape_direction_show(struct mddev *mddev, char *page) | |
5234 | { | |
5235 | return sprintf(page, "%s\n", | |
5236 | mddev->reshape_backwards ? "backwards" : "forwards"); | |
5237 | } | |
5238 | ||
5239 | static ssize_t | |
5240 | reshape_direction_store(struct mddev *mddev, const char *buf, size_t len) | |
5241 | { | |
5242 | int backwards = 0; | |
6791875e N |
5243 | int err; |
5244 | ||
2c810cdd N |
5245 | if (cmd_match(buf, "forwards")) |
5246 | backwards = 0; | |
5247 | else if (cmd_match(buf, "backwards")) | |
5248 | backwards = 1; | |
5249 | else | |
5250 | return -EINVAL; | |
5251 | if (mddev->reshape_backwards == backwards) | |
5252 | return len; | |
5253 | ||
6791875e N |
5254 | err = mddev_lock(mddev); |
5255 | if (err) | |
5256 | return err; | |
2c810cdd N |
5257 | /* check if we are allowed to change */ |
5258 | if (mddev->delta_disks) | |
6791875e N |
5259 | err = -EBUSY; |
5260 | else if (mddev->persistent && | |
2c810cdd | 5261 | mddev->major_version == 0) |
6791875e N |
5262 | err = -EINVAL; |
5263 | else | |
5264 | mddev->reshape_backwards = backwards; | |
5265 | mddev_unlock(mddev); | |
5266 | return err ?: len; | |
2c810cdd N |
5267 | } |
5268 | ||
5269 | static struct md_sysfs_entry md_reshape_direction = | |
5270 | __ATTR(reshape_direction, S_IRUGO|S_IWUSR, reshape_direction_show, | |
5271 | reshape_direction_store); | |
5272 | ||
b522adcd | 5273 | static ssize_t |
fd01b88c | 5274 | array_size_show(struct mddev *mddev, char *page) |
b522adcd DW |
5275 | { |
5276 | if (mddev->external_size) | |
5277 | return sprintf(page, "%llu\n", | |
5278 | (unsigned long long)mddev->array_sectors/2); | |
5279 | else | |
5280 | return sprintf(page, "default\n"); | |
5281 | } | |
5282 | ||
5283 | static ssize_t | |
fd01b88c | 5284 | array_size_store(struct mddev *mddev, const char *buf, size_t len) |
b522adcd DW |
5285 | { |
5286 | sector_t sectors; | |
6791875e N |
5287 | int err; |
5288 | ||
5289 | err = mddev_lock(mddev); | |
5290 | if (err) | |
5291 | return err; | |
b522adcd | 5292 | |
ab5a98b1 | 5293 | /* cluster raid doesn't support change array_sectors */ |
b670883b ZL |
5294 | if (mddev_is_clustered(mddev)) { |
5295 | mddev_unlock(mddev); | |
ab5a98b1 | 5296 | return -EINVAL; |
b670883b | 5297 | } |
ab5a98b1 | 5298 | |
b522adcd DW |
5299 | if (strncmp(buf, "default", 7) == 0) { |
5300 | if (mddev->pers) | |
5301 | sectors = mddev->pers->size(mddev, 0, 0); | |
5302 | else | |
5303 | sectors = mddev->array_sectors; | |
5304 | ||
5305 | mddev->external_size = 0; | |
5306 | } else { | |
5307 | if (strict_blocks_to_sectors(buf, §ors) < 0) | |
6791875e N |
5308 | err = -EINVAL; |
5309 | else if (mddev->pers && mddev->pers->size(mddev, 0, 0) < sectors) | |
5310 | err = -E2BIG; | |
5311 | else | |
5312 | mddev->external_size = 1; | |
b522adcd DW |
5313 | } |
5314 | ||
6791875e N |
5315 | if (!err) { |
5316 | mddev->array_sectors = sectors; | |
2c247c51 CH |
5317 | if (mddev->pers) |
5318 | set_capacity_and_notify(mddev->gendisk, | |
5319 | mddev->array_sectors); | |
cbe6ef1d | 5320 | } |
6791875e N |
5321 | mddev_unlock(mddev); |
5322 | return err ?: len; | |
b522adcd DW |
5323 | } |
5324 | ||
5325 | static struct md_sysfs_entry md_array_size = | |
5326 | __ATTR(array_size, S_IRUGO|S_IWUSR, array_size_show, | |
5327 | array_size_store); | |
e464eafd | 5328 | |
664aed04 AP |
5329 | static ssize_t |
5330 | consistency_policy_show(struct mddev *mddev, char *page) | |
5331 | { | |
5332 | int ret; | |
5333 | ||
5334 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) { | |
5335 | ret = sprintf(page, "journal\n"); | |
5336 | } else if (test_bit(MD_HAS_PPL, &mddev->flags)) { | |
5337 | ret = sprintf(page, "ppl\n"); | |
5338 | } else if (mddev->bitmap) { | |
5339 | ret = sprintf(page, "bitmap\n"); | |
5340 | } else if (mddev->pers) { | |
5341 | if (mddev->pers->sync_request) | |
5342 | ret = sprintf(page, "resync\n"); | |
5343 | else | |
5344 | ret = sprintf(page, "none\n"); | |
5345 | } else { | |
5346 | ret = sprintf(page, "unknown\n"); | |
5347 | } | |
5348 | ||
5349 | return ret; | |
5350 | } | |
5351 | ||
5352 | static ssize_t | |
5353 | consistency_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5354 | { | |
ba903a3e AP |
5355 | int err = 0; |
5356 | ||
664aed04 | 5357 | if (mddev->pers) { |
ba903a3e AP |
5358 | if (mddev->pers->change_consistency_policy) |
5359 | err = mddev->pers->change_consistency_policy(mddev, buf); | |
5360 | else | |
5361 | err = -EBUSY; | |
664aed04 AP |
5362 | } else if (mddev->external && strncmp(buf, "ppl", 3) == 0) { |
5363 | set_bit(MD_HAS_PPL, &mddev->flags); | |
664aed04 | 5364 | } else { |
ba903a3e | 5365 | err = -EINVAL; |
664aed04 | 5366 | } |
ba903a3e AP |
5367 | |
5368 | return err ? err : len; | |
664aed04 AP |
5369 | } |
5370 | ||
5371 | static struct md_sysfs_entry md_consistency_policy = | |
5372 | __ATTR(consistency_policy, S_IRUGO | S_IWUSR, consistency_policy_show, | |
5373 | consistency_policy_store); | |
5374 | ||
9a567843 GJ |
5375 | static ssize_t fail_last_dev_show(struct mddev *mddev, char *page) |
5376 | { | |
5377 | return sprintf(page, "%d\n", mddev->fail_last_dev); | |
5378 | } | |
5379 | ||
5380 | /* | |
5381 | * Setting fail_last_dev to true to allow last device to be forcibly removed | |
5382 | * from RAID1/RAID10. | |
5383 | */ | |
5384 | static ssize_t | |
5385 | fail_last_dev_store(struct mddev *mddev, const char *buf, size_t len) | |
5386 | { | |
5387 | int ret; | |
5388 | bool value; | |
5389 | ||
5390 | ret = kstrtobool(buf, &value); | |
5391 | if (ret) | |
5392 | return ret; | |
5393 | ||
5394 | if (value != mddev->fail_last_dev) | |
5395 | mddev->fail_last_dev = value; | |
5396 | ||
5397 | return len; | |
5398 | } | |
5399 | static struct md_sysfs_entry md_fail_last_dev = | |
5400 | __ATTR(fail_last_dev, S_IRUGO | S_IWUSR, fail_last_dev_show, | |
5401 | fail_last_dev_store); | |
5402 | ||
3938f5fb GJ |
5403 | static ssize_t serialize_policy_show(struct mddev *mddev, char *page) |
5404 | { | |
5405 | if (mddev->pers == NULL || (mddev->pers->level != 1)) | |
5406 | return sprintf(page, "n/a\n"); | |
5407 | else | |
5408 | return sprintf(page, "%d\n", mddev->serialize_policy); | |
5409 | } | |
5410 | ||
5411 | /* | |
5412 | * Setting serialize_policy to true to enforce write IO is not reordered | |
5413 | * for raid1. | |
5414 | */ | |
5415 | static ssize_t | |
5416 | serialize_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5417 | { | |
5418 | int err; | |
5419 | bool value; | |
5420 | ||
5421 | err = kstrtobool(buf, &value); | |
5422 | if (err) | |
5423 | return err; | |
5424 | ||
5425 | if (value == mddev->serialize_policy) | |
5426 | return len; | |
5427 | ||
5428 | err = mddev_lock(mddev); | |
5429 | if (err) | |
5430 | return err; | |
5431 | if (mddev->pers == NULL || (mddev->pers->level != 1)) { | |
5432 | pr_err("md: serialize_policy is only effective for raid1\n"); | |
5433 | err = -EINVAL; | |
5434 | goto unlock; | |
5435 | } | |
5436 | ||
5437 | mddev_suspend(mddev); | |
5438 | if (value) | |
5439 | mddev_create_serial_pool(mddev, NULL, true); | |
5440 | else | |
5441 | mddev_destroy_serial_pool(mddev, NULL, true); | |
5442 | mddev->serialize_policy = value; | |
5443 | mddev_resume(mddev); | |
5444 | unlock: | |
5445 | mddev_unlock(mddev); | |
5446 | return err ?: len; | |
5447 | } | |
5448 | ||
5449 | static struct md_sysfs_entry md_serialize_policy = | |
5450 | __ATTR(serialize_policy, S_IRUGO | S_IWUSR, serialize_policy_show, | |
5451 | serialize_policy_store); | |
5452 | ||
5453 | ||
eae1701f N |
5454 | static struct attribute *md_default_attrs[] = { |
5455 | &md_level.attr, | |
d4dbd025 | 5456 | &md_layout.attr, |
eae1701f | 5457 | &md_raid_disks.attr, |
ec164d07 | 5458 | &md_uuid.attr, |
3b34380a | 5459 | &md_chunk_size.attr, |
a35b0d69 | 5460 | &md_size.attr, |
a94213b1 | 5461 | &md_resync_start.attr, |
8bb93aac | 5462 | &md_metadata.attr, |
6d7ff738 | 5463 | &md_new_device.attr, |
16f17b39 | 5464 | &md_safe_delay.attr, |
9e653b63 | 5465 | &md_array_state.attr, |
08a02ecd | 5466 | &md_reshape_position.attr, |
2c810cdd | 5467 | &md_reshape_direction.attr, |
b522adcd | 5468 | &md_array_size.attr, |
1e50915f | 5469 | &max_corr_read_errors.attr, |
664aed04 | 5470 | &md_consistency_policy.attr, |
9a567843 | 5471 | &md_fail_last_dev.attr, |
3938f5fb | 5472 | &md_serialize_policy.attr, |
411036fa N |
5473 | NULL, |
5474 | }; | |
5475 | ||
51238e7f CH |
5476 | static const struct attribute_group md_default_group = { |
5477 | .attrs = md_default_attrs, | |
5478 | }; | |
5479 | ||
411036fa | 5480 | static struct attribute *md_redundancy_attrs[] = { |
24dd469d | 5481 | &md_scan_mode.attr, |
c4a39551 | 5482 | &md_last_scan_mode.attr, |
9d88883e | 5483 | &md_mismatches.attr, |
88202a0c N |
5484 | &md_sync_min.attr, |
5485 | &md_sync_max.attr, | |
5486 | &md_sync_speed.attr, | |
90b08710 | 5487 | &md_sync_force_parallel.attr, |
88202a0c | 5488 | &md_sync_completed.attr, |
5e96ee65 | 5489 | &md_min_sync.attr, |
c6207277 | 5490 | &md_max_sync.attr, |
e464eafd N |
5491 | &md_suspend_lo.attr, |
5492 | &md_suspend_hi.attr, | |
9b1d1dac | 5493 | &md_bitmap.attr, |
d7f3d291 | 5494 | &md_degraded.attr, |
eae1701f N |
5495 | NULL, |
5496 | }; | |
c32dc040 | 5497 | static const struct attribute_group md_redundancy_group = { |
411036fa N |
5498 | .name = NULL, |
5499 | .attrs = md_redundancy_attrs, | |
5500 | }; | |
5501 | ||
51238e7f CH |
5502 | static const struct attribute_group *md_attr_groups[] = { |
5503 | &md_default_group, | |
5504 | &md_bitmap_group, | |
5505 | NULL, | |
5506 | }; | |
5507 | ||
eae1701f N |
5508 | static ssize_t |
5509 | md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
5510 | { | |
5511 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5512 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5513 | ssize_t rv; |
eae1701f N |
5514 | |
5515 | if (!entry->show) | |
5516 | return -EIO; | |
af8a2434 | 5517 | spin_lock(&all_mddevs_lock); |
12a6caf2 | 5518 | if (!mddev_get(mddev)) { |
af8a2434 N |
5519 | spin_unlock(&all_mddevs_lock); |
5520 | return -EBUSY; | |
5521 | } | |
af8a2434 N |
5522 | spin_unlock(&all_mddevs_lock); |
5523 | ||
b7b17c9b | 5524 | rv = entry->show(mddev, page); |
af8a2434 | 5525 | mddev_put(mddev); |
96de1e66 | 5526 | return rv; |
eae1701f N |
5527 | } |
5528 | ||
5529 | static ssize_t | |
5530 | md_attr_store(struct kobject *kobj, struct attribute *attr, | |
5531 | const char *page, size_t length) | |
5532 | { | |
5533 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5534 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5535 | ssize_t rv; |
eae1701f N |
5536 | |
5537 | if (!entry->store) | |
5538 | return -EIO; | |
67463acb N |
5539 | if (!capable(CAP_SYS_ADMIN)) |
5540 | return -EACCES; | |
af8a2434 | 5541 | spin_lock(&all_mddevs_lock); |
12a6caf2 | 5542 | if (!mddev_get(mddev)) { |
af8a2434 N |
5543 | spin_unlock(&all_mddevs_lock); |
5544 | return -EBUSY; | |
5545 | } | |
af8a2434 | 5546 | spin_unlock(&all_mddevs_lock); |
6791875e | 5547 | rv = entry->store(mddev, page, length); |
af8a2434 | 5548 | mddev_put(mddev); |
96de1e66 | 5549 | return rv; |
eae1701f N |
5550 | } |
5551 | ||
33b614e3 | 5552 | static void md_kobj_release(struct kobject *ko) |
eae1701f | 5553 | { |
fd01b88c | 5554 | struct mddev *mddev = container_of(ko, struct mddev, kobj); |
a21d1504 N |
5555 | |
5556 | if (mddev->sysfs_state) | |
5557 | sysfs_put(mddev->sysfs_state); | |
e1a86dbb JB |
5558 | if (mddev->sysfs_level) |
5559 | sysfs_put(mddev->sysfs_level); | |
5560 | ||
ca39f750 CH |
5561 | del_gendisk(mddev->gendisk); |
5562 | put_disk(mddev->gendisk); | |
eae1701f N |
5563 | } |
5564 | ||
52cf25d0 | 5565 | static const struct sysfs_ops md_sysfs_ops = { |
eae1701f N |
5566 | .show = md_attr_show, |
5567 | .store = md_attr_store, | |
5568 | }; | |
5569 | static struct kobj_type md_ktype = { | |
33b614e3 | 5570 | .release = md_kobj_release, |
eae1701f | 5571 | .sysfs_ops = &md_sysfs_ops, |
51238e7f | 5572 | .default_groups = md_attr_groups, |
eae1701f N |
5573 | }; |
5574 | ||
1da177e4 LT |
5575 | int mdp_major = 0; |
5576 | ||
5fd3a17e DW |
5577 | static void mddev_delayed_delete(struct work_struct *ws) |
5578 | { | |
fd01b88c | 5579 | struct mddev *mddev = container_of(ws, struct mddev, del_work); |
5fd3a17e | 5580 | |
5fd3a17e DW |
5581 | kobject_put(&mddev->kobj); |
5582 | } | |
5583 | ||
4ad23a97 N |
5584 | static void no_op(struct percpu_ref *r) {} |
5585 | ||
a415c0f1 N |
5586 | int mddev_init_writes_pending(struct mddev *mddev) |
5587 | { | |
5588 | if (mddev->writes_pending.percpu_count_ptr) | |
5589 | return 0; | |
ddde2af7 RG |
5590 | if (percpu_ref_init(&mddev->writes_pending, no_op, |
5591 | PERCPU_REF_ALLOW_REINIT, GFP_KERNEL) < 0) | |
a415c0f1 N |
5592 | return -ENOMEM; |
5593 | /* We want to start with the refcount at zero */ | |
5594 | percpu_ref_put(&mddev->writes_pending); | |
5595 | return 0; | |
5596 | } | |
5597 | EXPORT_SYMBOL_GPL(mddev_init_writes_pending); | |
5598 | ||
34cb92c0 | 5599 | struct mddev *md_alloc(dev_t dev, char *name) |
1da177e4 | 5600 | { |
039b7225 N |
5601 | /* |
5602 | * If dev is zero, name is the name of a device to allocate with | |
5603 | * an arbitrary minor number. It will be "md_???" | |
5604 | * If dev is non-zero it must be a device number with a MAJOR of | |
5605 | * MD_MAJOR or mdp_major. In this case, if "name" is NULL, then | |
5606 | * the device is being created by opening a node in /dev. | |
5607 | * If "name" is not NULL, the device is being created by | |
5608 | * writing to /sys/module/md_mod/parameters/new_array. | |
5609 | */ | |
48c9c27b | 5610 | static DEFINE_MUTEX(disks_mutex); |
0d809b38 | 5611 | struct mddev *mddev; |
1da177e4 | 5612 | struct gendisk *disk; |
efeb53c0 N |
5613 | int partitioned; |
5614 | int shift; | |
5615 | int unit; | |
0d809b38 | 5616 | int error ; |
efeb53c0 | 5617 | |
0d809b38 CH |
5618 | /* |
5619 | * Wait for any previous instance of this device to be completely | |
5620 | * removed (mddev_delayed_delete). | |
d3374825 | 5621 | */ |
e804ac78 | 5622 | flush_workqueue(md_misc_wq); |
5e8daf90 | 5623 | flush_workqueue(md_rdev_misc_wq); |
d3374825 | 5624 | |
48c9c27b | 5625 | mutex_lock(&disks_mutex); |
0d809b38 CH |
5626 | mddev = mddev_alloc(dev); |
5627 | if (IS_ERR(mddev)) { | |
c57094a6 CH |
5628 | error = PTR_ERR(mddev); |
5629 | goto out_unlock; | |
0d809b38 CH |
5630 | } |
5631 | ||
5632 | partitioned = (MAJOR(mddev->unit) != MD_MAJOR); | |
5633 | shift = partitioned ? MdpMinorShift : 0; | |
5634 | unit = MINOR(mddev->unit) >> shift; | |
efeb53c0 | 5635 | |
039b7225 | 5636 | if (name && !dev) { |
efeb53c0 N |
5637 | /* Need to ensure that 'name' is not a duplicate. |
5638 | */ | |
fd01b88c | 5639 | struct mddev *mddev2; |
efeb53c0 N |
5640 | spin_lock(&all_mddevs_lock); |
5641 | ||
5642 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) | |
5643 | if (mddev2->gendisk && | |
5644 | strcmp(mddev2->gendisk->disk_name, name) == 0) { | |
5645 | spin_unlock(&all_mddevs_lock); | |
0d809b38 | 5646 | error = -EEXIST; |
c57094a6 | 5647 | goto out_free_mddev; |
efeb53c0 N |
5648 | } |
5649 | spin_unlock(&all_mddevs_lock); | |
1da177e4 | 5650 | } |
039b7225 N |
5651 | if (name && dev) |
5652 | /* | |
5653 | * Creating /dev/mdNNN via "newarray", so adjust hold_active. | |
5654 | */ | |
5655 | mddev->hold_active = UNTIL_STOP; | |
8b765398 | 5656 | |
0909dc44 | 5657 | error = -ENOMEM; |
0f1d2e06 CH |
5658 | disk = blk_alloc_disk(NUMA_NO_NODE); |
5659 | if (!disk) | |
c57094a6 | 5660 | goto out_free_mddev; |
409c57f3 | 5661 | |
efeb53c0 | 5662 | disk->major = MAJOR(mddev->unit); |
1da177e4 | 5663 | disk->first_minor = unit << shift; |
0f1d2e06 | 5664 | disk->minors = 1 << shift; |
efeb53c0 N |
5665 | if (name) |
5666 | strcpy(disk->disk_name, name); | |
5667 | else if (partitioned) | |
1da177e4 | 5668 | sprintf(disk->disk_name, "md_d%d", unit); |
ce7b0f46 | 5669 | else |
1da177e4 | 5670 | sprintf(disk->disk_name, "md%d", unit); |
1da177e4 LT |
5671 | disk->fops = &md_fops; |
5672 | disk->private_data = mddev; | |
0f1d2e06 CH |
5673 | |
5674 | mddev->queue = disk->queue; | |
5675 | blk_set_stacking_limits(&mddev->queue->limits); | |
56883a7e | 5676 | blk_queue_write_cache(mddev->queue, true, true); |
a564e23f | 5677 | disk->events |= DISK_EVENT_MEDIA_CHANGE; |
1da177e4 | 5678 | mddev->gendisk = disk; |
9be68dd7 | 5679 | error = add_disk(disk); |
7ad10691 | 5680 | if (error) |
c57094a6 | 5681 | goto out_put_disk; |
b0140891 | 5682 | |
ca39f750 | 5683 | kobject_init(&mddev->kobj, &md_ktype); |
28dec870 | 5684 | error = kobject_add(&mddev->kobj, &disk_to_dev(disk)->kobj, "%s", "md"); |
c57094a6 CH |
5685 | if (error) { |
5686 | /* | |
5687 | * The disk is already live at this point. Clear the hold flag | |
5688 | * and let mddev_put take care of the deletion, as it isn't any | |
5689 | * different from a normal close on last release now. | |
5690 | */ | |
5691 | mddev->hold_active = 0; | |
34cb92c0 CH |
5692 | mutex_unlock(&disks_mutex); |
5693 | mddev_put(mddev); | |
5694 | return ERR_PTR(error); | |
c57094a6 | 5695 | } |
7ad10691 CH |
5696 | |
5697 | kobject_uevent(&mddev->kobj, KOBJ_ADD); | |
5698 | mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state"); | |
5699 | mddev->sysfs_level = sysfs_get_dirent_safe(mddev->kobj.sd, "level"); | |
94f3cd7d | 5700 | mutex_unlock(&disks_mutex); |
34cb92c0 | 5701 | return mddev; |
c57094a6 CH |
5702 | |
5703 | out_put_disk: | |
5704 | put_disk(disk); | |
5705 | out_free_mddev: | |
5706 | mddev_free(mddev); | |
5707 | out_unlock: | |
5708 | mutex_unlock(&disks_mutex); | |
34cb92c0 CH |
5709 | return ERR_PTR(error); |
5710 | } | |
5711 | ||
5712 | static int md_alloc_and_put(dev_t dev, char *name) | |
5713 | { | |
5714 | struct mddev *mddev = md_alloc(dev, name); | |
5715 | ||
5716 | if (IS_ERR(mddev)) | |
5717 | return PTR_ERR(mddev); | |
5718 | mddev_put(mddev); | |
5719 | return 0; | |
efeb53c0 N |
5720 | } |
5721 | ||
28144f99 | 5722 | static void md_probe(dev_t dev) |
efeb53c0 | 5723 | { |
28144f99 CH |
5724 | if (MAJOR(dev) == MD_MAJOR && MINOR(dev) >= 512) |
5725 | return; | |
78b6350d | 5726 | if (create_on_open) |
34cb92c0 | 5727 | md_alloc_and_put(dev, NULL); |
1da177e4 LT |
5728 | } |
5729 | ||
e4dca7b7 | 5730 | static int add_named_array(const char *val, const struct kernel_param *kp) |
efeb53c0 | 5731 | { |
039b7225 N |
5732 | /* |
5733 | * val must be "md_*" or "mdNNN". | |
5734 | * For "md_*" we allocate an array with a large free minor number, and | |
efeb53c0 | 5735 | * set the name to val. val must not already be an active name. |
039b7225 N |
5736 | * For "mdNNN" we allocate an array with the minor number NNN |
5737 | * which must not already be in use. | |
efeb53c0 N |
5738 | */ |
5739 | int len = strlen(val); | |
5740 | char buf[DISK_NAME_LEN]; | |
039b7225 | 5741 | unsigned long devnum; |
efeb53c0 N |
5742 | |
5743 | while (len && val[len-1] == '\n') | |
5744 | len--; | |
5745 | if (len >= DISK_NAME_LEN) | |
5746 | return -E2BIG; | |
92d9aac9 | 5747 | strscpy(buf, val, len+1); |
039b7225 | 5748 | if (strncmp(buf, "md_", 3) == 0) |
34cb92c0 | 5749 | return md_alloc_and_put(0, buf); |
039b7225 N |
5750 | if (strncmp(buf, "md", 2) == 0 && |
5751 | isdigit(buf[2]) && | |
5752 | kstrtoul(buf+2, 10, &devnum) == 0 && | |
5753 | devnum <= MINORMASK) | |
34cb92c0 | 5754 | return md_alloc_and_put(MKDEV(MD_MAJOR, devnum), NULL); |
039b7225 N |
5755 | |
5756 | return -EINVAL; | |
efeb53c0 N |
5757 | } |
5758 | ||
8376d3c1 | 5759 | static void md_safemode_timeout(struct timer_list *t) |
1da177e4 | 5760 | { |
8376d3c1 | 5761 | struct mddev *mddev = from_timer(mddev, t, safemode_timer); |
1da177e4 | 5762 | |
4ad23a97 N |
5763 | mddev->safemode = 1; |
5764 | if (mddev->external) | |
5765 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
5766 | ||
1da177e4 LT |
5767 | md_wakeup_thread(mddev->thread); |
5768 | } | |
5769 | ||
6ff8d8ec | 5770 | static int start_dirty_degraded; |
1da177e4 | 5771 | |
fd01b88c | 5772 | int md_run(struct mddev *mddev) |
1da177e4 | 5773 | { |
2604b703 | 5774 | int err; |
3cb03002 | 5775 | struct md_rdev *rdev; |
84fc4b56 | 5776 | struct md_personality *pers; |
f51d46d0 | 5777 | bool nowait = true; |
1da177e4 | 5778 | |
a757e64c N |
5779 | if (list_empty(&mddev->disks)) |
5780 | /* cannot run an array with no devices.. */ | |
1da177e4 | 5781 | return -EINVAL; |
1da177e4 LT |
5782 | |
5783 | if (mddev->pers) | |
5784 | return -EBUSY; | |
bb4f1e9d N |
5785 | /* Cannot run until previous stop completes properly */ |
5786 | if (mddev->sysfs_active) | |
5787 | return -EBUSY; | |
b6eb127d | 5788 | |
1da177e4 LT |
5789 | /* |
5790 | * Analyze all RAID superblock(s) | |
5791 | */ | |
1ec4a939 N |
5792 | if (!mddev->raid_disks) { |
5793 | if (!mddev->persistent) | |
5794 | return -EINVAL; | |
6a5cb53a YY |
5795 | err = analyze_sbs(mddev); |
5796 | if (err) | |
5797 | return -EINVAL; | |
1ec4a939 | 5798 | } |
1da177e4 | 5799 | |
d9d166c2 N |
5800 | if (mddev->level != LEVEL_NONE) |
5801 | request_module("md-level-%d", mddev->level); | |
5802 | else if (mddev->clevel[0]) | |
5803 | request_module("md-%s", mddev->clevel); | |
1da177e4 LT |
5804 | |
5805 | /* | |
5806 | * Drop all container device buffers, from now on | |
5807 | * the only valid external interface is through the md | |
5808 | * device. | |
1da177e4 | 5809 | */ |
4b6c1060 | 5810 | mddev->has_superblocks = false; |
dafb20fa | 5811 | rdev_for_each(rdev, mddev) { |
b2d444d7 | 5812 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
5813 | continue; |
5814 | sync_blockdev(rdev->bdev); | |
f98393a6 | 5815 | invalidate_bdev(rdev->bdev); |
d7a47838 | 5816 | if (mddev->ro != 1 && rdev_read_only(rdev)) { |
97b20ef7 N |
5817 | mddev->ro = 1; |
5818 | if (mddev->gendisk) | |
5819 | set_disk_ro(mddev->gendisk, 1); | |
5820 | } | |
f0d76d70 | 5821 | |
4b6c1060 HM |
5822 | if (rdev->sb_page) |
5823 | mddev->has_superblocks = true; | |
5824 | ||
f0d76d70 N |
5825 | /* perform some consistency tests on the device. |
5826 | * We don't want the data to overlap the metadata, | |
58c0fed4 | 5827 | * Internal Bitmap issues have been handled elsewhere. |
f0d76d70 | 5828 | */ |
a6ff7e08 JB |
5829 | if (rdev->meta_bdev) { |
5830 | /* Nothing to check */; | |
5831 | } else if (rdev->data_offset < rdev->sb_start) { | |
58c0fed4 AN |
5832 | if (mddev->dev_sectors && |
5833 | rdev->data_offset + mddev->dev_sectors | |
0f420358 | 5834 | > rdev->sb_start) { |
9d48739e N |
5835 | pr_warn("md: %s: data overlaps metadata\n", |
5836 | mdname(mddev)); | |
f0d76d70 N |
5837 | return -EINVAL; |
5838 | } | |
5839 | } else { | |
0f420358 | 5840 | if (rdev->sb_start + rdev->sb_size/512 |
f0d76d70 | 5841 | > rdev->data_offset) { |
9d48739e N |
5842 | pr_warn("md: %s: metadata overlaps data\n", |
5843 | mdname(mddev)); | |
f0d76d70 N |
5844 | return -EINVAL; |
5845 | } | |
5846 | } | |
00bcb4ac | 5847 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
568ec936 | 5848 | nowait = nowait && bdev_nowait(rdev->bdev); |
1da177e4 LT |
5849 | } |
5850 | ||
afeee514 KO |
5851 | if (!bioset_initialized(&mddev->bio_set)) { |
5852 | err = bioset_init(&mddev->bio_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5853 | if (err) | |
5854 | return err; | |
10273170 | 5855 | } |
afeee514 KO |
5856 | if (!bioset_initialized(&mddev->sync_set)) { |
5857 | err = bioset_init(&mddev->sync_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5858 | if (err) | |
10764815 GJ |
5859 | goto exit_bio_set; |
5860 | } | |
a167f663 | 5861 | |
1da177e4 | 5862 | spin_lock(&pers_lock); |
d9d166c2 | 5863 | pers = find_pers(mddev->level, mddev->clevel); |
2604b703 | 5864 | if (!pers || !try_module_get(pers->owner)) { |
1da177e4 | 5865 | spin_unlock(&pers_lock); |
d9d166c2 | 5866 | if (mddev->level != LEVEL_NONE) |
9d48739e N |
5867 | pr_warn("md: personality for level %d is not loaded!\n", |
5868 | mddev->level); | |
d9d166c2 | 5869 | else |
9d48739e N |
5870 | pr_warn("md: personality for level %s is not loaded!\n", |
5871 | mddev->clevel); | |
bfc9dfdc SL |
5872 | err = -EINVAL; |
5873 | goto abort; | |
1da177e4 | 5874 | } |
1da177e4 | 5875 | spin_unlock(&pers_lock); |
34817e8c N |
5876 | if (mddev->level != pers->level) { |
5877 | mddev->level = pers->level; | |
5878 | mddev->new_level = pers->level; | |
5879 | } | |
92d9aac9 | 5880 | strscpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
1da177e4 | 5881 | |
f6705578 | 5882 | if (mddev->reshape_position != MaxSector && |
63c70c4f | 5883 | pers->start_reshape == NULL) { |
f6705578 | 5884 | /* This personality cannot handle reshaping... */ |
f6705578 | 5885 | module_put(pers->owner); |
bfc9dfdc SL |
5886 | err = -EINVAL; |
5887 | goto abort; | |
f6705578 N |
5888 | } |
5889 | ||
7dd5e7c3 N |
5890 | if (pers->sync_request) { |
5891 | /* Warn if this is a potentially silly | |
5892 | * configuration. | |
5893 | */ | |
3cb03002 | 5894 | struct md_rdev *rdev2; |
7dd5e7c3 | 5895 | int warned = 0; |
159ec1fc | 5896 | |
dafb20fa N |
5897 | rdev_for_each(rdev, mddev) |
5898 | rdev_for_each(rdev2, mddev) { | |
7dd5e7c3 | 5899 | if (rdev < rdev2 && |
61a27e1f CH |
5900 | rdev->bdev->bd_disk == |
5901 | rdev2->bdev->bd_disk) { | |
913cce5a | 5902 | pr_warn("%s: WARNING: %pg appears to be on the same physical disk as %pg.\n", |
9d48739e | 5903 | mdname(mddev), |
913cce5a CH |
5904 | rdev->bdev, |
5905 | rdev2->bdev); | |
7dd5e7c3 N |
5906 | warned = 1; |
5907 | } | |
5908 | } | |
159ec1fc | 5909 | |
7dd5e7c3 | 5910 | if (warned) |
9d48739e | 5911 | pr_warn("True protection against single-disk failure might be compromised.\n"); |
7dd5e7c3 N |
5912 | } |
5913 | ||
657390d2 | 5914 | mddev->recovery = 0; |
58c0fed4 AN |
5915 | /* may be over-ridden by personality */ |
5916 | mddev->resync_max_sectors = mddev->dev_sectors; | |
5917 | ||
6ff8d8ec | 5918 | mddev->ok_start_degraded = start_dirty_degraded; |
1da177e4 | 5919 | |
0f9552b5 | 5920 | if (start_readonly && mddev->ro == 0) |
f91de92e N |
5921 | mddev->ro = 2; /* read-only, but switch on first write */ |
5922 | ||
36d091f4 | 5923 | err = pers->run(mddev); |
13e53df3 | 5924 | if (err) |
9d48739e | 5925 | pr_warn("md: pers->run() failed ...\n"); |
36d091f4 | 5926 | else if (pers->size(mddev, 0, 0) < mddev->array_sectors) { |
9d48739e N |
5927 | WARN_ONCE(!mddev->external_size, |
5928 | "%s: default size too small, but 'external_size' not in effect?\n", | |
5929 | __func__); | |
5930 | pr_warn("md: invalid array_size %llu > default size %llu\n", | |
5931 | (unsigned long long)mddev->array_sectors / 2, | |
5932 | (unsigned long long)pers->size(mddev, 0, 0) / 2); | |
b522adcd | 5933 | err = -EINVAL; |
b522adcd | 5934 | } |
36d091f4 | 5935 | if (err == 0 && pers->sync_request && |
ef99bf48 | 5936 | (mddev->bitmap_info.file || mddev->bitmap_info.offset)) { |
f9209a32 GR |
5937 | struct bitmap *bitmap; |
5938 | ||
e64e4018 | 5939 | bitmap = md_bitmap_create(mddev, -1); |
f9209a32 GR |
5940 | if (IS_ERR(bitmap)) { |
5941 | err = PTR_ERR(bitmap); | |
9d48739e N |
5942 | pr_warn("%s: failed to create bitmap (%d)\n", |
5943 | mdname(mddev), err); | |
f9209a32 GR |
5944 | } else |
5945 | mddev->bitmap = bitmap; | |
5946 | ||
b15c2e57 | 5947 | } |
d494549a GJ |
5948 | if (err) |
5949 | goto bitmap_abort; | |
3e148a32 GJ |
5950 | |
5951 | if (mddev->bitmap_info.max_write_behind > 0) { | |
3e173ab5 | 5952 | bool create_pool = false; |
3e148a32 GJ |
5953 | |
5954 | rdev_for_each(rdev, mddev) { | |
5955 | if (test_bit(WriteMostly, &rdev->flags) && | |
404659cf | 5956 | rdev_init_serial(rdev)) |
3e173ab5 | 5957 | create_pool = true; |
3e148a32 | 5958 | } |
3e173ab5 | 5959 | if (create_pool && mddev->serial_info_pool == NULL) { |
404659cf GJ |
5960 | mddev->serial_info_pool = |
5961 | mempool_create_kmalloc_pool(NR_SERIAL_INFOS, | |
5962 | sizeof(struct serial_info)); | |
5963 | if (!mddev->serial_info_pool) { | |
3e148a32 | 5964 | err = -ENOMEM; |
d494549a | 5965 | goto bitmap_abort; |
3e148a32 GJ |
5966 | } |
5967 | } | |
5968 | } | |
5969 | ||
5c675f83 | 5970 | if (mddev->queue) { |
bb086a89 SL |
5971 | bool nonrot = true; |
5972 | ||
5973 | rdev_for_each(rdev, mddev) { | |
10f0d2a5 | 5974 | if (rdev->raid_disk >= 0 && !bdev_nonrot(rdev->bdev)) { |
bb086a89 SL |
5975 | nonrot = false; |
5976 | break; | |
5977 | } | |
5978 | } | |
5979 | if (mddev->degraded) | |
5980 | nonrot = false; | |
5981 | if (nonrot) | |
8b904b5b | 5982 | blk_queue_flag_set(QUEUE_FLAG_NONROT, mddev->queue); |
bb086a89 | 5983 | else |
8b904b5b | 5984 | blk_queue_flag_clear(QUEUE_FLAG_NONROT, mddev->queue); |
10764815 | 5985 | blk_queue_flag_set(QUEUE_FLAG_IO_STAT, mddev->queue); |
0f9650bd SL |
5986 | |
5987 | /* Set the NOWAIT flags if all underlying devices support it */ | |
5988 | if (nowait) | |
5989 | blk_queue_flag_set(QUEUE_FLAG_NOWAIT, mddev->queue); | |
5c675f83 | 5990 | } |
36d091f4 | 5991 | if (pers->sync_request) { |
00bcb4ac N |
5992 | if (mddev->kobj.sd && |
5993 | sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
5994 | pr_warn("md: cannot register extra attributes for %s\n", |
5995 | mdname(mddev)); | |
00bcb4ac | 5996 | mddev->sysfs_action = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_action"); |
e8efa9b8 JB |
5997 | mddev->sysfs_completed = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_completed"); |
5998 | mddev->sysfs_degraded = sysfs_get_dirent_safe(mddev->kobj.sd, "degraded"); | |
5e55e2f5 | 5999 | } else if (mddev->ro == 2) /* auto-readonly not meaningful */ |
fd9d49ca N |
6000 | mddev->ro = 0; |
6001 | ||
1e50915f RB |
6002 | atomic_set(&mddev->max_corr_read_errors, |
6003 | MD_DEFAULT_MAX_CORRECTED_READ_ERRORS); | |
1da177e4 | 6004 | mddev->safemode = 0; |
28c1b9fd GR |
6005 | if (mddev_is_clustered(mddev)) |
6006 | mddev->safemode_delay = 0; | |
6007 | else | |
7c9d5c54 | 6008 | mddev->safemode_delay = DEFAULT_SAFEMODE_DELAY; |
1da177e4 | 6009 | mddev->in_sync = 1; |
0ca69886 | 6010 | smp_wmb(); |
36d091f4 N |
6011 | spin_lock(&mddev->lock); |
6012 | mddev->pers = pers; | |
36d091f4 | 6013 | spin_unlock(&mddev->lock); |
dafb20fa | 6014 | rdev_for_each(rdev, mddev) |
36fad858 | 6015 | if (rdev->raid_disk >= 0) |
e5b521ee | 6016 | sysfs_link_rdev(mddev, rdev); /* failure here is OK */ |
f72ffdd6 | 6017 | |
a4a3d26d N |
6018 | if (mddev->degraded && !mddev->ro) |
6019 | /* This ensures that recovering status is reported immediately | |
6020 | * via sysfs - until a lack of spares is confirmed. | |
6021 | */ | |
6022 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
1da177e4 | 6023 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f72ffdd6 | 6024 | |
2953079c | 6025 | if (mddev->sb_flags) |
850b2b42 | 6026 | md_update_sb(mddev, 0); |
1da177e4 | 6027 | |
54679486 | 6028 | md_new_event(); |
1da177e4 | 6029 | return 0; |
b126194c | 6030 | |
d494549a GJ |
6031 | bitmap_abort: |
6032 | mddev_detach(mddev); | |
6033 | if (mddev->private) | |
6034 | pers->free(mddev, mddev->private); | |
6035 | mddev->private = NULL; | |
6036 | module_put(pers->owner); | |
6037 | md_bitmap_destroy(mddev); | |
b126194c | 6038 | abort: |
4bc034d3 | 6039 | bioset_exit(&mddev->sync_set); |
10764815 GJ |
6040 | exit_bio_set: |
6041 | bioset_exit(&mddev->bio_set); | |
b126194c | 6042 | return err; |
1da177e4 | 6043 | } |
390ee602 | 6044 | EXPORT_SYMBOL_GPL(md_run); |
1da177e4 | 6045 | |
7e0adbfc | 6046 | int do_md_run(struct mddev *mddev) |
fe60b014 N |
6047 | { |
6048 | int err; | |
6049 | ||
9d4b45d6 | 6050 | set_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
6051 | err = md_run(mddev); |
6052 | if (err) | |
6053 | goto out; | |
e64e4018 | 6054 | err = md_bitmap_load(mddev); |
69e51b44 | 6055 | if (err) { |
e64e4018 | 6056 | md_bitmap_destroy(mddev); |
69e51b44 N |
6057 | goto out; |
6058 | } | |
0fd018af | 6059 | |
28c1b9fd GR |
6060 | if (mddev_is_clustered(mddev)) |
6061 | md_allow_write(mddev); | |
6062 | ||
d5d885fd SL |
6063 | /* run start up tasks that require md_thread */ |
6064 | md_start(mddev); | |
6065 | ||
0fd018af JB |
6066 | md_wakeup_thread(mddev->thread); |
6067 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
6068 | ||
2c247c51 | 6069 | set_capacity_and_notify(mddev->gendisk, mddev->array_sectors); |
9d4b45d6 | 6070 | clear_bit(MD_NOT_READY, &mddev->flags); |
f0b4f7e2 | 6071 | mddev->changed = 1; |
fe60b014 | 6072 | kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); |
9d4b45d6 N |
6073 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6074 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
e1a86dbb | 6075 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
fe60b014 | 6076 | out: |
9d4b45d6 | 6077 | clear_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
6078 | return err; |
6079 | } | |
6080 | ||
d5d885fd SL |
6081 | int md_start(struct mddev *mddev) |
6082 | { | |
6083 | int ret = 0; | |
6084 | ||
6085 | if (mddev->pers->start) { | |
6086 | set_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
6087 | md_wakeup_thread(mddev->thread); | |
6088 | ret = mddev->pers->start(mddev); | |
6089 | clear_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
6090 | md_wakeup_thread(mddev->sync_thread); | |
6091 | } | |
6092 | return ret; | |
6093 | } | |
6094 | EXPORT_SYMBOL_GPL(md_start); | |
6095 | ||
fd01b88c | 6096 | static int restart_array(struct mddev *mddev) |
1da177e4 LT |
6097 | { |
6098 | struct gendisk *disk = mddev->gendisk; | |
97b20ef7 N |
6099 | struct md_rdev *rdev; |
6100 | bool has_journal = false; | |
6101 | bool has_readonly = false; | |
1da177e4 | 6102 | |
80fab1d7 | 6103 | /* Complain if it has no devices */ |
1da177e4 | 6104 | if (list_empty(&mddev->disks)) |
80fab1d7 AN |
6105 | return -ENXIO; |
6106 | if (!mddev->pers) | |
6107 | return -EINVAL; | |
6108 | if (!mddev->ro) | |
6109 | return -EBUSY; | |
339421de | 6110 | |
97b20ef7 N |
6111 | rcu_read_lock(); |
6112 | rdev_for_each_rcu(rdev, mddev) { | |
6113 | if (test_bit(Journal, &rdev->flags) && | |
6114 | !test_bit(Faulty, &rdev->flags)) | |
6115 | has_journal = true; | |
a42e0d70 | 6116 | if (rdev_read_only(rdev)) |
97b20ef7 N |
6117 | has_readonly = true; |
6118 | } | |
6119 | rcu_read_unlock(); | |
6120 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags) && !has_journal) | |
339421de | 6121 | /* Don't restart rw with journal missing/faulty */ |
339421de | 6122 | return -EINVAL; |
97b20ef7 N |
6123 | if (has_readonly) |
6124 | return -EROFS; | |
339421de | 6125 | |
80fab1d7 AN |
6126 | mddev->safemode = 0; |
6127 | mddev->ro = 0; | |
6128 | set_disk_ro(disk, 0); | |
9d48739e | 6129 | pr_debug("md: %s switched to read-write mode.\n", mdname(mddev)); |
80fab1d7 AN |
6130 | /* Kick recovery or resync if necessary */ |
6131 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6132 | md_wakeup_thread(mddev->thread); | |
6133 | md_wakeup_thread(mddev->sync_thread); | |
00bcb4ac | 6134 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
80fab1d7 | 6135 | return 0; |
1da177e4 LT |
6136 | } |
6137 | ||
fd01b88c | 6138 | static void md_clean(struct mddev *mddev) |
6177b472 N |
6139 | { |
6140 | mddev->array_sectors = 0; | |
6141 | mddev->external_size = 0; | |
6142 | mddev->dev_sectors = 0; | |
6143 | mddev->raid_disks = 0; | |
6144 | mddev->recovery_cp = 0; | |
6145 | mddev->resync_min = 0; | |
6146 | mddev->resync_max = MaxSector; | |
6147 | mddev->reshape_position = MaxSector; | |
6148 | mddev->external = 0; | |
6149 | mddev->persistent = 0; | |
6150 | mddev->level = LEVEL_NONE; | |
6151 | mddev->clevel[0] = 0; | |
6152 | mddev->flags = 0; | |
2953079c | 6153 | mddev->sb_flags = 0; |
6177b472 N |
6154 | mddev->ro = 0; |
6155 | mddev->metadata_type[0] = 0; | |
6156 | mddev->chunk_sectors = 0; | |
6157 | mddev->ctime = mddev->utime = 0; | |
6158 | mddev->layout = 0; | |
6159 | mddev->max_disks = 0; | |
6160 | mddev->events = 0; | |
a8707c08 | 6161 | mddev->can_decrease_events = 0; |
6177b472 | 6162 | mddev->delta_disks = 0; |
2c810cdd | 6163 | mddev->reshape_backwards = 0; |
6177b472 N |
6164 | mddev->new_level = LEVEL_NONE; |
6165 | mddev->new_layout = 0; | |
6166 | mddev->new_chunk_sectors = 0; | |
6167 | mddev->curr_resync = 0; | |
7f7583d4 | 6168 | atomic64_set(&mddev->resync_mismatches, 0); |
6177b472 N |
6169 | mddev->suspend_lo = mddev->suspend_hi = 0; |
6170 | mddev->sync_speed_min = mddev->sync_speed_max = 0; | |
6171 | mddev->recovery = 0; | |
6172 | mddev->in_sync = 0; | |
f0b4f7e2 | 6173 | mddev->changed = 0; |
6177b472 | 6174 | mddev->degraded = 0; |
6177b472 | 6175 | mddev->safemode = 0; |
bd691922 | 6176 | mddev->private = NULL; |
c20c33f0 | 6177 | mddev->cluster_info = NULL; |
6177b472 N |
6178 | mddev->bitmap_info.offset = 0; |
6179 | mddev->bitmap_info.default_offset = 0; | |
6409bb05 | 6180 | mddev->bitmap_info.default_space = 0; |
6177b472 N |
6181 | mddev->bitmap_info.chunksize = 0; |
6182 | mddev->bitmap_info.daemon_sleep = 0; | |
6183 | mddev->bitmap_info.max_write_behind = 0; | |
c20c33f0 | 6184 | mddev->bitmap_info.nodes = 0; |
6177b472 N |
6185 | } |
6186 | ||
fd01b88c | 6187 | static void __md_stop_writes(struct mddev *mddev) |
a047e125 | 6188 | { |
6b6204ee | 6189 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
21e0958e GJ |
6190 | if (work_pending(&mddev->del_work)) |
6191 | flush_workqueue(md_misc_wq); | |
a047e125 | 6192 | if (mddev->sync_thread) { |
a047e125 | 6193 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
9dfbdafd | 6194 | md_unregister_thread(&mddev->sync_thread); |
d0a18034 | 6195 | md_reap_sync_thread(mddev); |
a047e125 N |
6196 | } |
6197 | ||
6198 | del_timer_sync(&mddev->safemode_timer); | |
6199 | ||
034e33f5 SL |
6200 | if (mddev->pers && mddev->pers->quiesce) { |
6201 | mddev->pers->quiesce(mddev, 1); | |
6202 | mddev->pers->quiesce(mddev, 0); | |
6203 | } | |
e64e4018 | 6204 | md_bitmap_flush(mddev); |
a047e125 | 6205 | |
b6d428c6 | 6206 | if (mddev->ro == 0 && |
28c1b9fd | 6207 | ((!mddev->in_sync && !mddev_is_clustered(mddev)) || |
2953079c | 6208 | mddev->sb_flags)) { |
a047e125 | 6209 | /* mark array as shutdown cleanly */ |
28c1b9fd GR |
6210 | if (!mddev_is_clustered(mddev)) |
6211 | mddev->in_sync = 1; | |
a047e125 N |
6212 | md_update_sb(mddev, 1); |
6213 | } | |
69b00b5b GJ |
6214 | /* disable policy to guarantee rdevs free resources for serialization */ |
6215 | mddev->serialize_policy = 0; | |
6216 | mddev_destroy_serial_pool(mddev, NULL, true); | |
a047e125 | 6217 | } |
defad61a | 6218 | |
fd01b88c | 6219 | void md_stop_writes(struct mddev *mddev) |
defad61a | 6220 | { |
29f097c4 | 6221 | mddev_lock_nointr(mddev); |
defad61a N |
6222 | __md_stop_writes(mddev); |
6223 | mddev_unlock(mddev); | |
6224 | } | |
390ee602 | 6225 | EXPORT_SYMBOL_GPL(md_stop_writes); |
a047e125 | 6226 | |
5aa61f42 N |
6227 | static void mddev_detach(struct mddev *mddev) |
6228 | { | |
e64e4018 | 6229 | md_bitmap_wait_behind_writes(mddev); |
6b40bec3 | 6230 | if (mddev->pers && mddev->pers->quiesce && !mddev->suspended) { |
5aa61f42 N |
6231 | mddev->pers->quiesce(mddev, 1); |
6232 | mddev->pers->quiesce(mddev, 0); | |
6233 | } | |
6234 | md_unregister_thread(&mddev->thread); | |
6235 | if (mddev->queue) | |
6236 | blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ | |
6237 | } | |
6238 | ||
5eff3c43 | 6239 | static void __md_stop(struct mddev *mddev) |
6177b472 | 6240 | { |
36d091f4 | 6241 | struct md_personality *pers = mddev->pers; |
1d258758 | 6242 | md_bitmap_destroy(mddev); |
5aa61f42 | 6243 | mddev_detach(mddev); |
ee5d004f | 6244 | /* Ensure ->event_work is done */ |
21e0958e GJ |
6245 | if (mddev->event_work.func) |
6246 | flush_workqueue(md_misc_wq); | |
36d091f4 | 6247 | spin_lock(&mddev->lock); |
6177b472 | 6248 | mddev->pers = NULL; |
36d091f4 | 6249 | spin_unlock(&mddev->lock); |
07641b5f | 6250 | if (mddev->private) |
6251 | pers->free(mddev, mddev->private); | |
bd691922 | 6252 | mddev->private = NULL; |
36d091f4 N |
6253 | if (pers->sync_request && mddev->to_remove == NULL) |
6254 | mddev->to_remove = &md_redundancy_group; | |
6255 | module_put(pers->owner); | |
cca9cf90 | 6256 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
6aaa58c9 JW |
6257 | } |
6258 | ||
6259 | void md_stop(struct mddev *mddev) | |
6260 | { | |
6261 | /* stop the array and free an attached data structures. | |
6262 | * This is called from dm-raid | |
6263 | */ | |
0dd84b31 | 6264 | __md_stop_writes(mddev); |
6aaa58c9 | 6265 | __md_stop(mddev); |
afeee514 KO |
6266 | bioset_exit(&mddev->bio_set); |
6267 | bioset_exit(&mddev->sync_set); | |
5eff3c43 N |
6268 | } |
6269 | ||
390ee602 | 6270 | EXPORT_SYMBOL_GPL(md_stop); |
6177b472 | 6271 | |
a05b7ea0 | 6272 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) |
a4bd82d0 N |
6273 | { |
6274 | int err = 0; | |
30b8feb7 N |
6275 | int did_freeze = 0; |
6276 | ||
6277 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6278 | did_freeze = 1; | |
6279 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6280 | md_wakeup_thread(mddev->thread); | |
6281 | } | |
f851b60d | 6282 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6283 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6284 | if (mddev->sync_thread) |
30b8feb7 N |
6285 | /* Thread might be blocked waiting for metadata update |
6286 | * which will now never happen */ | |
6287 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6288 | |
2953079c | 6289 | if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
88724bfa | 6290 | return -EBUSY; |
30b8feb7 | 6291 | mddev_unlock(mddev); |
f851b60d N |
6292 | wait_event(resync_wait, !test_bit(MD_RECOVERY_RUNNING, |
6293 | &mddev->recovery)); | |
88724bfa | 6294 | wait_event(mddev->sb_wait, |
2953079c | 6295 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
30b8feb7 N |
6296 | mddev_lock_nointr(mddev); |
6297 | ||
a4bd82d0 | 6298 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6299 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 | 6300 | mddev->sync_thread || |
af8d8e6f | 6301 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6302 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
30b8feb7 N |
6303 | if (did_freeze) { |
6304 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6305 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6306 | md_wakeup_thread(mddev->thread); |
6307 | } | |
a4bd82d0 N |
6308 | err = -EBUSY; |
6309 | goto out; | |
6310 | } | |
6311 | if (mddev->pers) { | |
defad61a | 6312 | __md_stop_writes(mddev); |
a4bd82d0 N |
6313 | |
6314 | err = -ENXIO; | |
6315 | if (mddev->ro==1) | |
6316 | goto out; | |
6317 | mddev->ro = 1; | |
6318 | set_disk_ro(mddev->gendisk, 1); | |
6319 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d N |
6320 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
6321 | md_wakeup_thread(mddev->thread); | |
00bcb4ac | 6322 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
30b8feb7 | 6323 | err = 0; |
a4bd82d0 N |
6324 | } |
6325 | out: | |
6326 | mutex_unlock(&mddev->open_mutex); | |
6327 | return err; | |
6328 | } | |
6329 | ||
9e653b63 N |
6330 | /* mode: |
6331 | * 0 - completely stop and dis-assemble array | |
9e653b63 N |
6332 | * 2 - stop but do not disassemble array |
6333 | */ | |
f72ffdd6 | 6334 | static int do_md_stop(struct mddev *mddev, int mode, |
a05b7ea0 | 6335 | struct block_device *bdev) |
1da177e4 | 6336 | { |
1da177e4 | 6337 | struct gendisk *disk = mddev->gendisk; |
3cb03002 | 6338 | struct md_rdev *rdev; |
30b8feb7 N |
6339 | int did_freeze = 0; |
6340 | ||
6341 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6342 | did_freeze = 1; | |
6343 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6344 | md_wakeup_thread(mddev->thread); | |
6345 | } | |
f851b60d | 6346 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6347 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6348 | if (mddev->sync_thread) |
30b8feb7 N |
6349 | /* Thread might be blocked waiting for metadata update |
6350 | * which will now never happen */ | |
6351 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6352 | |
30b8feb7 | 6353 | mddev_unlock(mddev); |
f851b60d N |
6354 | wait_event(resync_wait, (mddev->sync_thread == NULL && |
6355 | !test_bit(MD_RECOVERY_RUNNING, | |
6356 | &mddev->recovery))); | |
30b8feb7 | 6357 | mddev_lock_nointr(mddev); |
1da177e4 | 6358 | |
c8c00a69 | 6359 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6360 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 N |
6361 | mddev->sysfs_active || |
6362 | mddev->sync_thread || | |
af8d8e6f | 6363 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6364 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
6e17b027 | 6365 | mutex_unlock(&mddev->open_mutex); |
30b8feb7 N |
6366 | if (did_freeze) { |
6367 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6368 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6369 | md_wakeup_thread(mddev->thread); |
6370 | } | |
260fa034 N |
6371 | return -EBUSY; |
6372 | } | |
6e17b027 | 6373 | if (mddev->pers) { |
a4bd82d0 N |
6374 | if (mddev->ro) |
6375 | set_disk_ro(disk, 0); | |
409c57f3 | 6376 | |
defad61a | 6377 | __md_stop_writes(mddev); |
5eff3c43 | 6378 | __md_stop(mddev); |
6177b472 | 6379 | |
a4bd82d0 | 6380 | /* tell userspace to handle 'inactive' */ |
00bcb4ac | 6381 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0d4ca600 | 6382 | |
dafb20fa | 6383 | rdev_for_each(rdev, mddev) |
36fad858 NK |
6384 | if (rdev->raid_disk >= 0) |
6385 | sysfs_unlink_rdev(mddev, rdev); | |
c4647292 | 6386 | |
2c247c51 | 6387 | set_capacity_and_notify(disk, 0); |
6e17b027 | 6388 | mutex_unlock(&mddev->open_mutex); |
f0b4f7e2 | 6389 | mddev->changed = 1; |
0d4ca600 | 6390 | |
a4bd82d0 N |
6391 | if (mddev->ro) |
6392 | mddev->ro = 0; | |
6e17b027 N |
6393 | } else |
6394 | mutex_unlock(&mddev->open_mutex); | |
1da177e4 LT |
6395 | /* |
6396 | * Free resources if final stop | |
6397 | */ | |
9e653b63 | 6398 | if (mode == 0) { |
9d48739e | 6399 | pr_info("md: %s stopped.\n", mdname(mddev)); |
1da177e4 | 6400 | |
c3d9714e | 6401 | if (mddev->bitmap_info.file) { |
4af1a041 N |
6402 | struct file *f = mddev->bitmap_info.file; |
6403 | spin_lock(&mddev->lock); | |
c3d9714e | 6404 | mddev->bitmap_info.file = NULL; |
4af1a041 N |
6405 | spin_unlock(&mddev->lock); |
6406 | fput(f); | |
978f946b | 6407 | } |
c3d9714e | 6408 | mddev->bitmap_info.offset = 0; |
978f946b | 6409 | |
1da177e4 LT |
6410 | export_array(mddev); |
6411 | ||
6177b472 | 6412 | md_clean(mddev); |
efeb53c0 N |
6413 | if (mddev->hold_active == UNTIL_STOP) |
6414 | mddev->hold_active = 0; | |
a4bd82d0 | 6415 | } |
54679486 | 6416 | md_new_event(); |
00bcb4ac | 6417 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6e17b027 | 6418 | return 0; |
1da177e4 LT |
6419 | } |
6420 | ||
fdee8ae4 | 6421 | #ifndef MODULE |
fd01b88c | 6422 | static void autorun_array(struct mddev *mddev) |
1da177e4 | 6423 | { |
3cb03002 | 6424 | struct md_rdev *rdev; |
1da177e4 LT |
6425 | int err; |
6426 | ||
a757e64c | 6427 | if (list_empty(&mddev->disks)) |
1da177e4 | 6428 | return; |
1da177e4 | 6429 | |
9d48739e | 6430 | pr_info("md: running: "); |
1da177e4 | 6431 | |
dafb20fa | 6432 | rdev_for_each(rdev, mddev) { |
913cce5a | 6433 | pr_cont("<%pg>", rdev->bdev); |
1da177e4 | 6434 | } |
9d48739e | 6435 | pr_cont("\n"); |
1da177e4 | 6436 | |
d710e138 | 6437 | err = do_md_run(mddev); |
1da177e4 | 6438 | if (err) { |
9d48739e | 6439 | pr_warn("md: do_md_run() returned %d\n", err); |
a05b7ea0 | 6440 | do_md_stop(mddev, 0, NULL); |
1da177e4 LT |
6441 | } |
6442 | } | |
6443 | ||
6444 | /* | |
6445 | * lets try to run arrays based on all disks that have arrived | |
6446 | * until now. (those are in pending_raid_disks) | |
6447 | * | |
6448 | * the method: pick the first pending disk, collect all disks with | |
6449 | * the same UUID, remove all from the pending list and put them into | |
6450 | * the 'same_array' list. Then order this list based on superblock | |
6451 | * update time (freshest comes first), kick out 'old' disks and | |
6452 | * compare superblocks. If everything's fine then run it. | |
6453 | * | |
6454 | * If "unit" is allocated, then bump its reference count | |
6455 | */ | |
6456 | static void autorun_devices(int part) | |
6457 | { | |
3cb03002 | 6458 | struct md_rdev *rdev0, *rdev, *tmp; |
fd01b88c | 6459 | struct mddev *mddev; |
1da177e4 | 6460 | |
9d48739e | 6461 | pr_info("md: autorun ...\n"); |
1da177e4 | 6462 | while (!list_empty(&pending_raid_disks)) { |
e8703fe1 | 6463 | int unit; |
1da177e4 | 6464 | dev_t dev; |
ad01c9e3 | 6465 | LIST_HEAD(candidates); |
1da177e4 | 6466 | rdev0 = list_entry(pending_raid_disks.next, |
3cb03002 | 6467 | struct md_rdev, same_set); |
1da177e4 | 6468 | |
913cce5a | 6469 | pr_debug("md: considering %pg ...\n", rdev0->bdev); |
1da177e4 | 6470 | INIT_LIST_HEAD(&candidates); |
159ec1fc | 6471 | rdev_for_each_list(rdev, tmp, &pending_raid_disks) |
1da177e4 | 6472 | if (super_90_load(rdev, rdev0, 0) >= 0) { |
913cce5a CH |
6473 | pr_debug("md: adding %pg ...\n", |
6474 | rdev->bdev); | |
1da177e4 LT |
6475 | list_move(&rdev->same_set, &candidates); |
6476 | } | |
6477 | /* | |
6478 | * now we have a set of devices, with all of them having | |
6479 | * mostly sane superblocks. It's time to allocate the | |
6480 | * mddev. | |
6481 | */ | |
e8703fe1 N |
6482 | if (part) { |
6483 | dev = MKDEV(mdp_major, | |
6484 | rdev0->preferred_minor << MdpMinorShift); | |
6485 | unit = MINOR(dev) >> MdpMinorShift; | |
6486 | } else { | |
6487 | dev = MKDEV(MD_MAJOR, rdev0->preferred_minor); | |
6488 | unit = MINOR(dev); | |
6489 | } | |
6490 | if (rdev0->preferred_minor != unit) { | |
913cce5a CH |
6491 | pr_warn("md: unit number in %pg is bad: %d\n", |
6492 | rdev0->bdev, rdev0->preferred_minor); | |
1da177e4 LT |
6493 | break; |
6494 | } | |
1da177e4 | 6495 | |
34cb92c0 CH |
6496 | mddev = md_alloc(dev, NULL); |
6497 | if (IS_ERR(mddev)) | |
1da177e4 | 6498 | break; |
65aa97c4 | 6499 | |
f72ffdd6 | 6500 | if (mddev_lock(mddev)) |
9d48739e | 6501 | pr_warn("md: %s locked, cannot run\n", mdname(mddev)); |
1da177e4 LT |
6502 | else if (mddev->raid_disks || mddev->major_version |
6503 | || !list_empty(&mddev->disks)) { | |
913cce5a CH |
6504 | pr_warn("md: %s already running, cannot run %pg\n", |
6505 | mdname(mddev), rdev0->bdev); | |
1da177e4 LT |
6506 | mddev_unlock(mddev); |
6507 | } else { | |
9d48739e | 6508 | pr_debug("md: created %s\n", mdname(mddev)); |
1ec4a939 | 6509 | mddev->persistent = 1; |
159ec1fc | 6510 | rdev_for_each_list(rdev, tmp, &candidates) { |
1da177e4 LT |
6511 | list_del_init(&rdev->same_set); |
6512 | if (bind_rdev_to_array(rdev, mddev)) | |
6513 | export_rdev(rdev); | |
6514 | } | |
6515 | autorun_array(mddev); | |
6516 | mddev_unlock(mddev); | |
6517 | } | |
6518 | /* on success, candidates will be empty, on error | |
6519 | * it won't... | |
6520 | */ | |
159ec1fc | 6521 | rdev_for_each_list(rdev, tmp, &candidates) { |
4b80991c | 6522 | list_del_init(&rdev->same_set); |
1da177e4 | 6523 | export_rdev(rdev); |
4b80991c | 6524 | } |
1da177e4 LT |
6525 | mddev_put(mddev); |
6526 | } | |
9d48739e | 6527 | pr_info("md: ... autorun DONE.\n"); |
1da177e4 | 6528 | } |
fdee8ae4 | 6529 | #endif /* !MODULE */ |
1da177e4 | 6530 | |
f72ffdd6 | 6531 | static int get_version(void __user *arg) |
1da177e4 LT |
6532 | { |
6533 | mdu_version_t ver; | |
6534 | ||
6535 | ver.major = MD_MAJOR_VERSION; | |
6536 | ver.minor = MD_MINOR_VERSION; | |
6537 | ver.patchlevel = MD_PATCHLEVEL_VERSION; | |
6538 | ||
6539 | if (copy_to_user(arg, &ver, sizeof(ver))) | |
6540 | return -EFAULT; | |
6541 | ||
6542 | return 0; | |
6543 | } | |
6544 | ||
f72ffdd6 | 6545 | static int get_array_info(struct mddev *mddev, void __user *arg) |
1da177e4 LT |
6546 | { |
6547 | mdu_array_info_t info; | |
a9f326eb | 6548 | int nr,working,insync,failed,spare; |
3cb03002 | 6549 | struct md_rdev *rdev; |
1da177e4 | 6550 | |
1ca69c4b N |
6551 | nr = working = insync = failed = spare = 0; |
6552 | rcu_read_lock(); | |
6553 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 6554 | nr++; |
b2d444d7 | 6555 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
6556 | failed++; |
6557 | else { | |
6558 | working++; | |
b2d444d7 | 6559 | if (test_bit(In_sync, &rdev->flags)) |
f72ffdd6 | 6560 | insync++; |
b347af81 SL |
6561 | else if (test_bit(Journal, &rdev->flags)) |
6562 | /* TODO: add journal count to md_u.h */ | |
6563 | ; | |
1da177e4 LT |
6564 | else |
6565 | spare++; | |
6566 | } | |
6567 | } | |
1ca69c4b | 6568 | rcu_read_unlock(); |
1da177e4 LT |
6569 | |
6570 | info.major_version = mddev->major_version; | |
6571 | info.minor_version = mddev->minor_version; | |
6572 | info.patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6573 | info.ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 6574 | info.level = mddev->level; |
58c0fed4 AN |
6575 | info.size = mddev->dev_sectors / 2; |
6576 | if (info.size != mddev->dev_sectors / 2) /* overflow */ | |
284ae7ca | 6577 | info.size = -1; |
1da177e4 LT |
6578 | info.nr_disks = nr; |
6579 | info.raid_disks = mddev->raid_disks; | |
6580 | info.md_minor = mddev->md_minor; | |
6581 | info.not_persistent= !mddev->persistent; | |
6582 | ||
9ebc6ef1 | 6583 | info.utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
6584 | info.state = 0; |
6585 | if (mddev->in_sync) | |
6586 | info.state = (1<<MD_SB_CLEAN); | |
c3d9714e | 6587 | if (mddev->bitmap && mddev->bitmap_info.offset) |
9bd35920 | 6588 | info.state |= (1<<MD_SB_BITMAP_PRESENT); |
ca8895d9 GR |
6589 | if (mddev_is_clustered(mddev)) |
6590 | info.state |= (1<<MD_SB_CLUSTERED); | |
a9f326eb | 6591 | info.active_disks = insync; |
1da177e4 LT |
6592 | info.working_disks = working; |
6593 | info.failed_disks = failed; | |
6594 | info.spare_disks = spare; | |
6595 | ||
6596 | info.layout = mddev->layout; | |
9d8f0363 | 6597 | info.chunk_size = mddev->chunk_sectors << 9; |
1da177e4 LT |
6598 | |
6599 | if (copy_to_user(arg, &info, sizeof(info))) | |
6600 | return -EFAULT; | |
6601 | ||
6602 | return 0; | |
6603 | } | |
6604 | ||
f72ffdd6 | 6605 | static int get_bitmap_file(struct mddev *mddev, void __user * arg) |
32a7627c N |
6606 | { |
6607 | mdu_bitmap_file_t *file = NULL; /* too big for stack allocation */ | |
f4ad3d38 | 6608 | char *ptr; |
4af1a041 | 6609 | int err; |
32a7627c | 6610 | |
b6878d9e | 6611 | file = kzalloc(sizeof(*file), GFP_NOIO); |
32a7627c | 6612 | if (!file) |
4af1a041 | 6613 | return -ENOMEM; |
32a7627c | 6614 | |
4af1a041 N |
6615 | err = 0; |
6616 | spin_lock(&mddev->lock); | |
25eafe1a BR |
6617 | /* bitmap enabled */ |
6618 | if (mddev->bitmap_info.file) { | |
6619 | ptr = file_path(mddev->bitmap_info.file, file->pathname, | |
6620 | sizeof(file->pathname)); | |
6621 | if (IS_ERR(ptr)) | |
6622 | err = PTR_ERR(ptr); | |
6623 | else | |
6624 | memmove(file->pathname, ptr, | |
6625 | sizeof(file->pathname)-(ptr-file->pathname)); | |
6626 | } | |
4af1a041 | 6627 | spin_unlock(&mddev->lock); |
32a7627c | 6628 | |
4af1a041 N |
6629 | if (err == 0 && |
6630 | copy_to_user(arg, file, sizeof(*file))) | |
32a7627c | 6631 | err = -EFAULT; |
4af1a041 | 6632 | |
32a7627c N |
6633 | kfree(file); |
6634 | return err; | |
6635 | } | |
6636 | ||
f72ffdd6 | 6637 | static int get_disk_info(struct mddev *mddev, void __user * arg) |
1da177e4 LT |
6638 | { |
6639 | mdu_disk_info_t info; | |
3cb03002 | 6640 | struct md_rdev *rdev; |
1da177e4 LT |
6641 | |
6642 | if (copy_from_user(&info, arg, sizeof(info))) | |
6643 | return -EFAULT; | |
6644 | ||
1ca69c4b | 6645 | rcu_read_lock(); |
57d051dc | 6646 | rdev = md_find_rdev_nr_rcu(mddev, info.number); |
1da177e4 LT |
6647 | if (rdev) { |
6648 | info.major = MAJOR(rdev->bdev->bd_dev); | |
6649 | info.minor = MINOR(rdev->bdev->bd_dev); | |
6650 | info.raid_disk = rdev->raid_disk; | |
6651 | info.state = 0; | |
b2d444d7 | 6652 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 6653 | info.state |= (1<<MD_DISK_FAULTY); |
b2d444d7 | 6654 | else if (test_bit(In_sync, &rdev->flags)) { |
1da177e4 LT |
6655 | info.state |= (1<<MD_DISK_ACTIVE); |
6656 | info.state |= (1<<MD_DISK_SYNC); | |
6657 | } | |
9efdca16 | 6658 | if (test_bit(Journal, &rdev->flags)) |
bac624f3 | 6659 | info.state |= (1<<MD_DISK_JOURNAL); |
8ddf9efe N |
6660 | if (test_bit(WriteMostly, &rdev->flags)) |
6661 | info.state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
6662 | if (test_bit(FailFast, &rdev->flags)) |
6663 | info.state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 LT |
6664 | } else { |
6665 | info.major = info.minor = 0; | |
6666 | info.raid_disk = -1; | |
6667 | info.state = (1<<MD_DISK_REMOVED); | |
6668 | } | |
1ca69c4b | 6669 | rcu_read_unlock(); |
1da177e4 LT |
6670 | |
6671 | if (copy_to_user(arg, &info, sizeof(info))) | |
6672 | return -EFAULT; | |
6673 | ||
6674 | return 0; | |
6675 | } | |
6676 | ||
7e0adbfc | 6677 | int md_add_new_disk(struct mddev *mddev, struct mdu_disk_info_s *info) |
1da177e4 | 6678 | { |
3cb03002 | 6679 | struct md_rdev *rdev; |
1da177e4 LT |
6680 | dev_t dev = MKDEV(info->major,info->minor); |
6681 | ||
1aee41f6 GR |
6682 | if (mddev_is_clustered(mddev) && |
6683 | !(info->state & ((1 << MD_DISK_CLUSTER_ADD) | (1 << MD_DISK_CANDIDATE)))) { | |
9d48739e N |
6684 | pr_warn("%s: Cannot add to clustered mddev.\n", |
6685 | mdname(mddev)); | |
1aee41f6 GR |
6686 | return -EINVAL; |
6687 | } | |
6688 | ||
1da177e4 LT |
6689 | if (info->major != MAJOR(dev) || info->minor != MINOR(dev)) |
6690 | return -EOVERFLOW; | |
6691 | ||
6692 | if (!mddev->raid_disks) { | |
6693 | int err; | |
6694 | /* expecting a device which has a superblock */ | |
6695 | rdev = md_import_device(dev, mddev->major_version, mddev->minor_version); | |
6696 | if (IS_ERR(rdev)) { | |
9d48739e | 6697 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6698 | PTR_ERR(rdev)); |
6699 | return PTR_ERR(rdev); | |
6700 | } | |
6701 | if (!list_empty(&mddev->disks)) { | |
3cb03002 N |
6702 | struct md_rdev *rdev0 |
6703 | = list_entry(mddev->disks.next, | |
6704 | struct md_rdev, same_set); | |
a9f326eb | 6705 | err = super_types[mddev->major_version] |
1da177e4 LT |
6706 | .load_super(rdev, rdev0, mddev->minor_version); |
6707 | if (err < 0) { | |
913cce5a CH |
6708 | pr_warn("md: %pg has different UUID to %pg\n", |
6709 | rdev->bdev, | |
6710 | rdev0->bdev); | |
1da177e4 LT |
6711 | export_rdev(rdev); |
6712 | return -EINVAL; | |
6713 | } | |
6714 | } | |
6715 | err = bind_rdev_to_array(rdev, mddev); | |
6716 | if (err) | |
6717 | export_rdev(rdev); | |
6718 | return err; | |
6719 | } | |
6720 | ||
6721 | /* | |
7e0adbfc | 6722 | * md_add_new_disk can be used once the array is assembled |
1da177e4 LT |
6723 | * to add "hot spares". They must already have a superblock |
6724 | * written | |
6725 | */ | |
6726 | if (mddev->pers) { | |
6727 | int err; | |
6728 | if (!mddev->pers->hot_add_disk) { | |
9d48739e N |
6729 | pr_warn("%s: personality does not support diskops!\n", |
6730 | mdname(mddev)); | |
1da177e4 LT |
6731 | return -EINVAL; |
6732 | } | |
7b1e35f6 N |
6733 | if (mddev->persistent) |
6734 | rdev = md_import_device(dev, mddev->major_version, | |
6735 | mddev->minor_version); | |
6736 | else | |
6737 | rdev = md_import_device(dev, -1, -1); | |
1da177e4 | 6738 | if (IS_ERR(rdev)) { |
9d48739e | 6739 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6740 | PTR_ERR(rdev)); |
6741 | return PTR_ERR(rdev); | |
6742 | } | |
1a855a06 | 6743 | /* set saved_raid_disk if appropriate */ |
41158c7e N |
6744 | if (!mddev->persistent) { |
6745 | if (info->state & (1<<MD_DISK_SYNC) && | |
bf572541 | 6746 | info->raid_disk < mddev->raid_disks) { |
41158c7e | 6747 | rdev->raid_disk = info->raid_disk; |
bf572541 | 6748 | set_bit(In_sync, &rdev->flags); |
8313b8e5 | 6749 | clear_bit(Bitmap_sync, &rdev->flags); |
bf572541 | 6750 | } else |
41158c7e | 6751 | rdev->raid_disk = -1; |
f466722c | 6752 | rdev->saved_raid_disk = rdev->raid_disk; |
41158c7e N |
6753 | } else |
6754 | super_types[mddev->major_version]. | |
6755 | validate_super(mddev, rdev); | |
bedd86b7 | 6756 | if ((info->state & (1<<MD_DISK_SYNC)) && |
f4563091 | 6757 | rdev->raid_disk != info->raid_disk) { |
bedd86b7 N |
6758 | /* This was a hot-add request, but events doesn't |
6759 | * match, so reject it. | |
6760 | */ | |
6761 | export_rdev(rdev); | |
6762 | return -EINVAL; | |
6763 | } | |
6764 | ||
b2d444d7 | 6765 | clear_bit(In_sync, &rdev->flags); /* just to be sure */ |
8ddf9efe N |
6766 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6767 | set_bit(WriteMostly, &rdev->flags); | |
575a80fa N |
6768 | else |
6769 | clear_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6770 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6771 | set_bit(FailFast, &rdev->flags); | |
6772 | else | |
6773 | clear_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6774 | |
f6b6ec5c SL |
6775 | if (info->state & (1<<MD_DISK_JOURNAL)) { |
6776 | struct md_rdev *rdev2; | |
6777 | bool has_journal = false; | |
6778 | ||
6779 | /* make sure no existing journal disk */ | |
6780 | rdev_for_each(rdev2, mddev) { | |
6781 | if (test_bit(Journal, &rdev2->flags)) { | |
6782 | has_journal = true; | |
6783 | break; | |
6784 | } | |
6785 | } | |
230b55fa | 6786 | if (has_journal || mddev->bitmap) { |
f6b6ec5c SL |
6787 | export_rdev(rdev); |
6788 | return -EBUSY; | |
6789 | } | |
bac624f3 | 6790 | set_bit(Journal, &rdev->flags); |
f6b6ec5c | 6791 | } |
1aee41f6 GR |
6792 | /* |
6793 | * check whether the device shows up in other nodes | |
6794 | */ | |
6795 | if (mddev_is_clustered(mddev)) { | |
dbb64f86 | 6796 | if (info->state & (1 << MD_DISK_CANDIDATE)) |
1aee41f6 | 6797 | set_bit(Candidate, &rdev->flags); |
dbb64f86 | 6798 | else if (info->state & (1 << MD_DISK_CLUSTER_ADD)) { |
1aee41f6 | 6799 | /* --add initiated by this node */ |
dbb64f86 | 6800 | err = md_cluster_ops->add_new_disk(mddev, rdev); |
1aee41f6 | 6801 | if (err) { |
1aee41f6 GR |
6802 | export_rdev(rdev); |
6803 | return err; | |
6804 | } | |
6805 | } | |
6806 | } | |
6807 | ||
1da177e4 LT |
6808 | rdev->raid_disk = -1; |
6809 | err = bind_rdev_to_array(rdev, mddev); | |
dbb64f86 | 6810 | |
1da177e4 LT |
6811 | if (err) |
6812 | export_rdev(rdev); | |
dbb64f86 GR |
6813 | |
6814 | if (mddev_is_clustered(mddev)) { | |
e566aef1 GJ |
6815 | if (info->state & (1 << MD_DISK_CANDIDATE)) { |
6816 | if (!err) { | |
6817 | err = md_cluster_ops->new_disk_ack(mddev, | |
6818 | err == 0); | |
6819 | if (err) | |
6820 | md_kick_rdev_from_array(rdev); | |
6821 | } | |
6822 | } else { | |
dbb64f86 GR |
6823 | if (err) |
6824 | md_cluster_ops->add_new_disk_cancel(mddev); | |
6825 | else | |
6826 | err = add_bound_rdev(rdev); | |
6827 | } | |
6828 | ||
6829 | } else if (!err) | |
a6da4ef8 | 6830 | err = add_bound_rdev(rdev); |
dbb64f86 | 6831 | |
1da177e4 LT |
6832 | return err; |
6833 | } | |
6834 | ||
7e0adbfc | 6835 | /* otherwise, md_add_new_disk is only allowed |
1da177e4 LT |
6836 | * for major_version==0 superblocks |
6837 | */ | |
6838 | if (mddev->major_version != 0) { | |
9d48739e | 6839 | pr_warn("%s: ADD_NEW_DISK not supported\n", mdname(mddev)); |
1da177e4 LT |
6840 | return -EINVAL; |
6841 | } | |
6842 | ||
6843 | if (!(info->state & (1<<MD_DISK_FAULTY))) { | |
6844 | int err; | |
d710e138 | 6845 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6846 | if (IS_ERR(rdev)) { |
9d48739e | 6847 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6848 | PTR_ERR(rdev)); |
6849 | return PTR_ERR(rdev); | |
6850 | } | |
6851 | rdev->desc_nr = info->number; | |
6852 | if (info->raid_disk < mddev->raid_disks) | |
6853 | rdev->raid_disk = info->raid_disk; | |
6854 | else | |
6855 | rdev->raid_disk = -1; | |
6856 | ||
1da177e4 | 6857 | if (rdev->raid_disk < mddev->raid_disks) |
b2d444d7 N |
6858 | if (info->state & (1<<MD_DISK_SYNC)) |
6859 | set_bit(In_sync, &rdev->flags); | |
1da177e4 | 6860 | |
8ddf9efe N |
6861 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6862 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6863 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6864 | set_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6865 | |
1da177e4 | 6866 | if (!mddev->persistent) { |
9d48739e | 6867 | pr_debug("md: nonpersistent superblock ...\n"); |
0fe80347 | 6868 | rdev->sb_start = bdev_nr_sectors(rdev->bdev); |
77304d2a | 6869 | } else |
57b2caa3 | 6870 | rdev->sb_start = calc_dev_sboffset(rdev); |
8190e754 | 6871 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6872 | |
2bf071bf N |
6873 | err = bind_rdev_to_array(rdev, mddev); |
6874 | if (err) { | |
6875 | export_rdev(rdev); | |
6876 | return err; | |
6877 | } | |
1da177e4 LT |
6878 | } |
6879 | ||
6880 | return 0; | |
6881 | } | |
6882 | ||
f72ffdd6 | 6883 | static int hot_remove_disk(struct mddev *mddev, dev_t dev) |
1da177e4 | 6884 | { |
3cb03002 | 6885 | struct md_rdev *rdev; |
1da177e4 | 6886 | |
c42a0e26 YY |
6887 | if (!mddev->pers) |
6888 | return -ENODEV; | |
6889 | ||
1da177e4 LT |
6890 | rdev = find_rdev(mddev, dev); |
6891 | if (!rdev) | |
6892 | return -ENXIO; | |
6893 | ||
2910ff17 GR |
6894 | if (rdev->raid_disk < 0) |
6895 | goto kick_rdev; | |
293467aa | 6896 | |
3ea8929d N |
6897 | clear_bit(Blocked, &rdev->flags); |
6898 | remove_and_add_spares(mddev, rdev); | |
6899 | ||
1da177e4 LT |
6900 | if (rdev->raid_disk >= 0) |
6901 | goto busy; | |
6902 | ||
2910ff17 | 6903 | kick_rdev: |
bca5b065 ZH |
6904 | if (mddev_is_clustered(mddev)) { |
6905 | if (md_cluster_ops->remove_disk(mddev, rdev)) | |
6906 | goto busy; | |
6907 | } | |
88bcfef7 | 6908 | |
fb56dfef | 6909 | md_kick_rdev_from_array(rdev); |
2953079c | 6910 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6911 | if (mddev->thread) |
6912 | md_wakeup_thread(mddev->thread); | |
6913 | else | |
6914 | md_update_sb(mddev, 1); | |
54679486 | 6915 | md_new_event(); |
1da177e4 LT |
6916 | |
6917 | return 0; | |
6918 | busy: | |
913cce5a CH |
6919 | pr_debug("md: cannot remove active disk %pg from %s ...\n", |
6920 | rdev->bdev, mdname(mddev)); | |
1da177e4 LT |
6921 | return -EBUSY; |
6922 | } | |
6923 | ||
f72ffdd6 | 6924 | static int hot_add_disk(struct mddev *mddev, dev_t dev) |
1da177e4 | 6925 | { |
1da177e4 | 6926 | int err; |
3cb03002 | 6927 | struct md_rdev *rdev; |
1da177e4 LT |
6928 | |
6929 | if (!mddev->pers) | |
6930 | return -ENODEV; | |
6931 | ||
6932 | if (mddev->major_version != 0) { | |
9d48739e | 6933 | pr_warn("%s: HOT_ADD may only be used with version-0 superblocks.\n", |
1da177e4 LT |
6934 | mdname(mddev)); |
6935 | return -EINVAL; | |
6936 | } | |
6937 | if (!mddev->pers->hot_add_disk) { | |
9d48739e | 6938 | pr_warn("%s: personality does not support diskops!\n", |
1da177e4 LT |
6939 | mdname(mddev)); |
6940 | return -EINVAL; | |
6941 | } | |
6942 | ||
d710e138 | 6943 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6944 | if (IS_ERR(rdev)) { |
9d48739e | 6945 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6946 | PTR_ERR(rdev)); |
6947 | return -EINVAL; | |
6948 | } | |
6949 | ||
6950 | if (mddev->persistent) | |
57b2caa3 | 6951 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 6952 | else |
0fe80347 | 6953 | rdev->sb_start = bdev_nr_sectors(rdev->bdev); |
1da177e4 | 6954 | |
8190e754 | 6955 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6956 | |
b2d444d7 | 6957 | if (test_bit(Faulty, &rdev->flags)) { |
913cce5a CH |
6958 | pr_warn("md: can not hot-add faulty %pg disk to %s!\n", |
6959 | rdev->bdev, mdname(mddev)); | |
1da177e4 LT |
6960 | err = -EINVAL; |
6961 | goto abort_export; | |
6962 | } | |
293467aa | 6963 | |
b2d444d7 | 6964 | clear_bit(In_sync, &rdev->flags); |
1da177e4 | 6965 | rdev->desc_nr = -1; |
5842730d | 6966 | rdev->saved_raid_disk = -1; |
2bf071bf N |
6967 | err = bind_rdev_to_array(rdev, mddev); |
6968 | if (err) | |
2aa82191 | 6969 | goto abort_export; |
1da177e4 LT |
6970 | |
6971 | /* | |
6972 | * The rest should better be atomic, we can have disk failures | |
6973 | * noticed in interrupt contexts ... | |
6974 | */ | |
6975 | ||
1da177e4 LT |
6976 | rdev->raid_disk = -1; |
6977 | ||
2953079c | 6978 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6979 | if (!mddev->thread) |
6980 | md_update_sb(mddev, 1); | |
f51d46d0 VV |
6981 | /* |
6982 | * If the new disk does not support REQ_NOWAIT, | |
6983 | * disable on the whole MD. | |
6984 | */ | |
568ec936 | 6985 | if (!bdev_nowait(rdev->bdev)) { |
913cce5a CH |
6986 | pr_info("%s: Disabling nowait because %pg does not support nowait\n", |
6987 | mdname(mddev), rdev->bdev); | |
f51d46d0 VV |
6988 | blk_queue_flag_clear(QUEUE_FLAG_NOWAIT, mddev->queue); |
6989 | } | |
1da177e4 LT |
6990 | /* |
6991 | * Kick recovery, maybe this spare has to be added to the | |
6992 | * array immediately. | |
6993 | */ | |
6994 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6995 | md_wakeup_thread(mddev->thread); | |
54679486 | 6996 | md_new_event(); |
1da177e4 LT |
6997 | return 0; |
6998 | ||
1da177e4 LT |
6999 | abort_export: |
7000 | export_rdev(rdev); | |
7001 | return err; | |
7002 | } | |
7003 | ||
fd01b88c | 7004 | static int set_bitmap_file(struct mddev *mddev, int fd) |
32a7627c | 7005 | { |
035328c2 | 7006 | int err = 0; |
32a7627c | 7007 | |
36fa3063 | 7008 | if (mddev->pers) { |
d66b1b39 | 7009 | if (!mddev->pers->quiesce || !mddev->thread) |
36fa3063 N |
7010 | return -EBUSY; |
7011 | if (mddev->recovery || mddev->sync_thread) | |
7012 | return -EBUSY; | |
7013 | /* we should be able to change the bitmap.. */ | |
7014 | } | |
32a7627c | 7015 | |
36fa3063 | 7016 | if (fd >= 0) { |
035328c2 | 7017 | struct inode *inode; |
1e594bb2 N |
7018 | struct file *f; |
7019 | ||
7020 | if (mddev->bitmap || mddev->bitmap_info.file) | |
36fa3063 | 7021 | return -EEXIST; /* cannot add when bitmap is present */ |
1e594bb2 | 7022 | f = fget(fd); |
32a7627c | 7023 | |
1e594bb2 | 7024 | if (f == NULL) { |
9d48739e N |
7025 | pr_warn("%s: error: failed to get bitmap file\n", |
7026 | mdname(mddev)); | |
36fa3063 N |
7027 | return -EBADF; |
7028 | } | |
7029 | ||
1e594bb2 | 7030 | inode = f->f_mapping->host; |
035328c2 | 7031 | if (!S_ISREG(inode->i_mode)) { |
9d48739e N |
7032 | pr_warn("%s: error: bitmap file must be a regular file\n", |
7033 | mdname(mddev)); | |
035328c2 | 7034 | err = -EBADF; |
1e594bb2 | 7035 | } else if (!(f->f_mode & FMODE_WRITE)) { |
9d48739e N |
7036 | pr_warn("%s: error: bitmap file must open for write\n", |
7037 | mdname(mddev)); | |
035328c2 N |
7038 | err = -EBADF; |
7039 | } else if (atomic_read(&inode->i_writecount) != 1) { | |
9d48739e N |
7040 | pr_warn("%s: error: bitmap file is already in use\n", |
7041 | mdname(mddev)); | |
035328c2 N |
7042 | err = -EBUSY; |
7043 | } | |
7044 | if (err) { | |
1e594bb2 | 7045 | fput(f); |
36fa3063 N |
7046 | return err; |
7047 | } | |
1e594bb2 | 7048 | mddev->bitmap_info.file = f; |
c3d9714e | 7049 | mddev->bitmap_info.offset = 0; /* file overrides offset */ |
36fa3063 N |
7050 | } else if (mddev->bitmap == NULL) |
7051 | return -ENOENT; /* cannot remove what isn't there */ | |
7052 | err = 0; | |
7053 | if (mddev->pers) { | |
69e51b44 | 7054 | if (fd >= 0) { |
f9209a32 GR |
7055 | struct bitmap *bitmap; |
7056 | ||
e64e4018 | 7057 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7058 | mddev_suspend(mddev); |
f9209a32 GR |
7059 | if (!IS_ERR(bitmap)) { |
7060 | mddev->bitmap = bitmap; | |
e64e4018 | 7061 | err = md_bitmap_load(mddev); |
ba599aca N |
7062 | } else |
7063 | err = PTR_ERR(bitmap); | |
52a0d49d | 7064 | if (err) { |
e64e4018 | 7065 | md_bitmap_destroy(mddev); |
52a0d49d N |
7066 | fd = -1; |
7067 | } | |
9e1cc0a5 | 7068 | mddev_resume(mddev); |
52a0d49d | 7069 | } else if (fd < 0) { |
9e1cc0a5 | 7070 | mddev_suspend(mddev); |
e64e4018 | 7071 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7072 | mddev_resume(mddev); |
d7375ab3 | 7073 | } |
d7375ab3 N |
7074 | } |
7075 | if (fd < 0) { | |
4af1a041 N |
7076 | struct file *f = mddev->bitmap_info.file; |
7077 | if (f) { | |
7078 | spin_lock(&mddev->lock); | |
7079 | mddev->bitmap_info.file = NULL; | |
7080 | spin_unlock(&mddev->lock); | |
7081 | fput(f); | |
7082 | } | |
36fa3063 N |
7083 | } |
7084 | ||
32a7627c N |
7085 | return err; |
7086 | } | |
7087 | ||
1da177e4 | 7088 | /* |
7e0adbfc | 7089 | * md_set_array_info is used two different ways |
1da177e4 LT |
7090 | * The original usage is when creating a new array. |
7091 | * In this usage, raid_disks is > 0 and it together with | |
7092 | * level, size, not_persistent,layout,chunksize determine the | |
7093 | * shape of the array. | |
7094 | * This will always create an array with a type-0.90.0 superblock. | |
7095 | * The newer usage is when assembling an array. | |
7096 | * In this case raid_disks will be 0, and the major_version field is | |
7097 | * use to determine which style super-blocks are to be found on the devices. | |
7098 | * The minor and patch _version numbers are also kept incase the | |
7099 | * super_block handler wishes to interpret them. | |
7100 | */ | |
7e0adbfc | 7101 | int md_set_array_info(struct mddev *mddev, struct mdu_array_info_s *info) |
1da177e4 | 7102 | { |
1da177e4 LT |
7103 | if (info->raid_disks == 0) { |
7104 | /* just setting version number for superblock loading */ | |
7105 | if (info->major_version < 0 || | |
50511da3 | 7106 | info->major_version >= ARRAY_SIZE(super_types) || |
1da177e4 LT |
7107 | super_types[info->major_version].name == NULL) { |
7108 | /* maybe try to auto-load a module? */ | |
9d48739e | 7109 | pr_warn("md: superblock version %d not known\n", |
1da177e4 LT |
7110 | info->major_version); |
7111 | return -EINVAL; | |
7112 | } | |
7113 | mddev->major_version = info->major_version; | |
7114 | mddev->minor_version = info->minor_version; | |
7115 | mddev->patch_version = info->patch_version; | |
3f9d7b0d | 7116 | mddev->persistent = !info->not_persistent; |
cbd19983 N |
7117 | /* ensure mddev_put doesn't delete this now that there |
7118 | * is some minimal configuration. | |
7119 | */ | |
9ebc6ef1 | 7120 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
7121 | return 0; |
7122 | } | |
7123 | mddev->major_version = MD_MAJOR_VERSION; | |
7124 | mddev->minor_version = MD_MINOR_VERSION; | |
7125 | mddev->patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 7126 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
7127 | |
7128 | mddev->level = info->level; | |
17115e03 | 7129 | mddev->clevel[0] = 0; |
58c0fed4 | 7130 | mddev->dev_sectors = 2 * (sector_t)info->size; |
1da177e4 LT |
7131 | mddev->raid_disks = info->raid_disks; |
7132 | /* don't set md_minor, it is determined by which /dev/md* was | |
7133 | * openned | |
7134 | */ | |
7135 | if (info->state & (1<<MD_SB_CLEAN)) | |
7136 | mddev->recovery_cp = MaxSector; | |
7137 | else | |
7138 | mddev->recovery_cp = 0; | |
7139 | mddev->persistent = ! info->not_persistent; | |
e691063a | 7140 | mddev->external = 0; |
1da177e4 LT |
7141 | |
7142 | mddev->layout = info->layout; | |
33f2c35a N |
7143 | if (mddev->level == 0) |
7144 | /* Cannot trust RAID0 layout info here */ | |
7145 | mddev->layout = -1; | |
9d8f0363 | 7146 | mddev->chunk_sectors = info->chunk_size >> 9; |
1da177e4 | 7147 | |
2953079c | 7148 | if (mddev->persistent) { |
1b3bae49 N |
7149 | mddev->max_disks = MD_SB_DISKS; |
7150 | mddev->flags = 0; | |
7151 | mddev->sb_flags = 0; | |
2953079c SL |
7152 | } |
7153 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
1da177e4 | 7154 | |
c3d9714e | 7155 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 7156 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
c3d9714e | 7157 | mddev->bitmap_info.offset = 0; |
b2a2703c | 7158 | |
f6705578 N |
7159 | mddev->reshape_position = MaxSector; |
7160 | ||
1da177e4 LT |
7161 | /* |
7162 | * Generate a 128 bit UUID | |
7163 | */ | |
7164 | get_random_bytes(mddev->uuid, 16); | |
7165 | ||
f6705578 | 7166 | mddev->new_level = mddev->level; |
664e7c41 | 7167 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
7168 | mddev->new_layout = mddev->layout; |
7169 | mddev->delta_disks = 0; | |
2c810cdd | 7170 | mddev->reshape_backwards = 0; |
f6705578 | 7171 | |
1da177e4 LT |
7172 | return 0; |
7173 | } | |
7174 | ||
fd01b88c | 7175 | void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors) |
1f403624 | 7176 | { |
efa4b77b | 7177 | lockdep_assert_held(&mddev->reconfig_mutex); |
b522adcd DW |
7178 | |
7179 | if (mddev->external_size) | |
7180 | return; | |
7181 | ||
1f403624 DW |
7182 | mddev->array_sectors = array_sectors; |
7183 | } | |
7184 | EXPORT_SYMBOL(md_set_array_sectors); | |
7185 | ||
fd01b88c | 7186 | static int update_size(struct mddev *mddev, sector_t num_sectors) |
a35b0d69 | 7187 | { |
3cb03002 | 7188 | struct md_rdev *rdev; |
a35b0d69 | 7189 | int rv; |
d71f9f88 | 7190 | int fit = (num_sectors == 0); |
818da59f | 7191 | sector_t old_dev_sectors = mddev->dev_sectors; |
ab5a98b1 | 7192 | |
a35b0d69 N |
7193 | if (mddev->pers->resize == NULL) |
7194 | return -EINVAL; | |
d71f9f88 AN |
7195 | /* The "num_sectors" is the number of sectors of each device that |
7196 | * is used. This can only make sense for arrays with redundancy. | |
7197 | * linear and raid0 always use whatever space is available. We can only | |
7198 | * consider changing this number if no resync or reconstruction is | |
7199 | * happening, and if the new size is acceptable. It must fit before the | |
0f420358 | 7200 | * sb_start or, if that is <data_offset, it must fit before the size |
d71f9f88 AN |
7201 | * of each device. If num_sectors is zero, we find the largest size |
7202 | * that fits. | |
a35b0d69 | 7203 | */ |
f851b60d N |
7204 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
7205 | mddev->sync_thread) | |
a35b0d69 | 7206 | return -EBUSY; |
bd8839e0 N |
7207 | if (mddev->ro) |
7208 | return -EROFS; | |
a4a6125a | 7209 | |
dafb20fa | 7210 | rdev_for_each(rdev, mddev) { |
dd8ac336 | 7211 | sector_t avail = rdev->sectors; |
01ab5662 | 7212 | |
d71f9f88 AN |
7213 | if (fit && (num_sectors == 0 || num_sectors > avail)) |
7214 | num_sectors = avail; | |
7215 | if (avail < num_sectors) | |
a35b0d69 N |
7216 | return -ENOSPC; |
7217 | } | |
d71f9f88 | 7218 | rv = mddev->pers->resize(mddev, num_sectors); |
c9483634 | 7219 | if (!rv) { |
818da59f GJ |
7220 | if (mddev_is_clustered(mddev)) |
7221 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
7222 | else if (mddev->queue) { | |
2c247c51 CH |
7223 | set_capacity_and_notify(mddev->gendisk, |
7224 | mddev->array_sectors); | |
c9483634 GJ |
7225 | } |
7226 | } | |
a35b0d69 N |
7227 | return rv; |
7228 | } | |
7229 | ||
fd01b88c | 7230 | static int update_raid_disks(struct mddev *mddev, int raid_disks) |
da943b99 N |
7231 | { |
7232 | int rv; | |
c6563a8c | 7233 | struct md_rdev *rdev; |
da943b99 | 7234 | /* change the number of raid disks */ |
63c70c4f | 7235 | if (mddev->pers->check_reshape == NULL) |
da943b99 | 7236 | return -EINVAL; |
bd8839e0 N |
7237 | if (mddev->ro) |
7238 | return -EROFS; | |
da943b99 | 7239 | if (raid_disks <= 0 || |
233fca36 | 7240 | (mddev->max_disks && raid_disks >= mddev->max_disks)) |
da943b99 | 7241 | return -EINVAL; |
f851b60d N |
7242 | if (mddev->sync_thread || |
7243 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || | |
a8da01f7 | 7244 | test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) || |
f851b60d | 7245 | mddev->reshape_position != MaxSector) |
da943b99 | 7246 | return -EBUSY; |
c6563a8c N |
7247 | |
7248 | rdev_for_each(rdev, mddev) { | |
7249 | if (mddev->raid_disks < raid_disks && | |
7250 | rdev->data_offset < rdev->new_data_offset) | |
7251 | return -EINVAL; | |
7252 | if (mddev->raid_disks > raid_disks && | |
7253 | rdev->data_offset > rdev->new_data_offset) | |
7254 | return -EINVAL; | |
7255 | } | |
7256 | ||
63c70c4f | 7257 | mddev->delta_disks = raid_disks - mddev->raid_disks; |
2c810cdd N |
7258 | if (mddev->delta_disks < 0) |
7259 | mddev->reshape_backwards = 1; | |
7260 | else if (mddev->delta_disks > 0) | |
7261 | mddev->reshape_backwards = 0; | |
63c70c4f N |
7262 | |
7263 | rv = mddev->pers->check_reshape(mddev); | |
2c810cdd | 7264 | if (rv < 0) { |
de171cb9 | 7265 | mddev->delta_disks = 0; |
2c810cdd N |
7266 | mddev->reshape_backwards = 0; |
7267 | } | |
da943b99 N |
7268 | return rv; |
7269 | } | |
7270 | ||
1da177e4 LT |
7271 | /* |
7272 | * update_array_info is used to change the configuration of an | |
7273 | * on-line array. | |
7274 | * The version, ctime,level,size,raid_disks,not_persistent, layout,chunk_size | |
7275 | * fields in the info are checked against the array. | |
7276 | * Any differences that cannot be handled will cause an error. | |
7277 | * Normally, only one change can be managed at a time. | |
7278 | */ | |
fd01b88c | 7279 | static int update_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
7280 | { |
7281 | int rv = 0; | |
7282 | int cnt = 0; | |
36fa3063 N |
7283 | int state = 0; |
7284 | ||
7285 | /* calculate expected state,ignoring low bits */ | |
c3d9714e | 7286 | if (mddev->bitmap && mddev->bitmap_info.offset) |
36fa3063 | 7287 | state |= (1 << MD_SB_BITMAP_PRESENT); |
1da177e4 LT |
7288 | |
7289 | if (mddev->major_version != info->major_version || | |
7290 | mddev->minor_version != info->minor_version || | |
7291 | /* mddev->patch_version != info->patch_version || */ | |
7292 | mddev->ctime != info->ctime || | |
7293 | mddev->level != info->level || | |
7294 | /* mddev->layout != info->layout || */ | |
4e023612 | 7295 | mddev->persistent != !info->not_persistent || |
9d8f0363 | 7296 | mddev->chunk_sectors != info->chunk_size >> 9 || |
36fa3063 N |
7297 | /* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */ |
7298 | ((state^info->state) & 0xfffffe00) | |
7299 | ) | |
1da177e4 LT |
7300 | return -EINVAL; |
7301 | /* Check there is only one change */ | |
58c0fed4 AN |
7302 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
7303 | cnt++; | |
7304 | if (mddev->raid_disks != info->raid_disks) | |
7305 | cnt++; | |
7306 | if (mddev->layout != info->layout) | |
7307 | cnt++; | |
7308 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) | |
7309 | cnt++; | |
7310 | if (cnt == 0) | |
7311 | return 0; | |
7312 | if (cnt > 1) | |
7313 | return -EINVAL; | |
1da177e4 LT |
7314 | |
7315 | if (mddev->layout != info->layout) { | |
7316 | /* Change layout | |
7317 | * we don't need to do anything at the md level, the | |
7318 | * personality will take care of it all. | |
7319 | */ | |
50ac168a | 7320 | if (mddev->pers->check_reshape == NULL) |
1da177e4 | 7321 | return -EINVAL; |
597a711b N |
7322 | else { |
7323 | mddev->new_layout = info->layout; | |
50ac168a | 7324 | rv = mddev->pers->check_reshape(mddev); |
597a711b N |
7325 | if (rv) |
7326 | mddev->new_layout = mddev->layout; | |
7327 | return rv; | |
7328 | } | |
1da177e4 | 7329 | } |
58c0fed4 | 7330 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
d71f9f88 | 7331 | rv = update_size(mddev, (sector_t)info->size * 2); |
a35b0d69 | 7332 | |
da943b99 N |
7333 | if (mddev->raid_disks != info->raid_disks) |
7334 | rv = update_raid_disks(mddev, info->raid_disks); | |
7335 | ||
36fa3063 | 7336 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) { |
293467aa GR |
7337 | if (mddev->pers->quiesce == NULL || mddev->thread == NULL) { |
7338 | rv = -EINVAL; | |
7339 | goto err; | |
7340 | } | |
7341 | if (mddev->recovery || mddev->sync_thread) { | |
7342 | rv = -EBUSY; | |
7343 | goto err; | |
7344 | } | |
36fa3063 | 7345 | if (info->state & (1<<MD_SB_BITMAP_PRESENT)) { |
f9209a32 | 7346 | struct bitmap *bitmap; |
36fa3063 | 7347 | /* add the bitmap */ |
293467aa GR |
7348 | if (mddev->bitmap) { |
7349 | rv = -EEXIST; | |
7350 | goto err; | |
7351 | } | |
7352 | if (mddev->bitmap_info.default_offset == 0) { | |
7353 | rv = -EINVAL; | |
7354 | goto err; | |
7355 | } | |
c3d9714e N |
7356 | mddev->bitmap_info.offset = |
7357 | mddev->bitmap_info.default_offset; | |
6409bb05 N |
7358 | mddev->bitmap_info.space = |
7359 | mddev->bitmap_info.default_space; | |
e64e4018 | 7360 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7361 | mddev_suspend(mddev); |
f9209a32 GR |
7362 | if (!IS_ERR(bitmap)) { |
7363 | mddev->bitmap = bitmap; | |
e64e4018 | 7364 | rv = md_bitmap_load(mddev); |
ba599aca N |
7365 | } else |
7366 | rv = PTR_ERR(bitmap); | |
36fa3063 | 7367 | if (rv) |
e64e4018 | 7368 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7369 | mddev_resume(mddev); |
36fa3063 N |
7370 | } else { |
7371 | /* remove the bitmap */ | |
293467aa GR |
7372 | if (!mddev->bitmap) { |
7373 | rv = -ENOENT; | |
7374 | goto err; | |
7375 | } | |
7376 | if (mddev->bitmap->storage.file) { | |
7377 | rv = -EINVAL; | |
7378 | goto err; | |
7379 | } | |
f6a2dc64 GJ |
7380 | if (mddev->bitmap_info.nodes) { |
7381 | /* hold PW on all the bitmap lock */ | |
7382 | if (md_cluster_ops->lock_all_bitmaps(mddev) <= 0) { | |
9d48739e | 7383 | pr_warn("md: can't change bitmap to none since the array is in use by more than one node\n"); |
f6a2dc64 GJ |
7384 | rv = -EPERM; |
7385 | md_cluster_ops->unlock_all_bitmaps(mddev); | |
7386 | goto err; | |
7387 | } | |
7388 | ||
7389 | mddev->bitmap_info.nodes = 0; | |
7390 | md_cluster_ops->leave(mddev); | |
edee9dfe | 7391 | module_put(md_cluster_mod); |
7c9d5c54 | 7392 | mddev->safemode_delay = DEFAULT_SAFEMODE_DELAY; |
f6a2dc64 | 7393 | } |
9e1cc0a5 | 7394 | mddev_suspend(mddev); |
e64e4018 | 7395 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7396 | mddev_resume(mddev); |
c3d9714e | 7397 | mddev->bitmap_info.offset = 0; |
36fa3063 N |
7398 | } |
7399 | } | |
850b2b42 | 7400 | md_update_sb(mddev, 1); |
293467aa GR |
7401 | return rv; |
7402 | err: | |
1da177e4 LT |
7403 | return rv; |
7404 | } | |
7405 | ||
fd01b88c | 7406 | static int set_disk_faulty(struct mddev *mddev, dev_t dev) |
1da177e4 | 7407 | { |
3cb03002 | 7408 | struct md_rdev *rdev; |
1ca69c4b | 7409 | int err = 0; |
1da177e4 LT |
7410 | |
7411 | if (mddev->pers == NULL) | |
7412 | return -ENODEV; | |
7413 | ||
1ca69c4b | 7414 | rcu_read_lock(); |
1532d9e8 | 7415 | rdev = md_find_rdev_rcu(mddev, dev); |
1da177e4 | 7416 | if (!rdev) |
1ca69c4b N |
7417 | err = -ENODEV; |
7418 | else { | |
7419 | md_error(mddev, rdev); | |
9631abdb | 7420 | if (test_bit(MD_BROKEN, &mddev->flags)) |
1ca69c4b N |
7421 | err = -EBUSY; |
7422 | } | |
7423 | rcu_read_unlock(); | |
7424 | return err; | |
1da177e4 LT |
7425 | } |
7426 | ||
2f9618ce AN |
7427 | /* |
7428 | * We have a problem here : there is no easy way to give a CHS | |
7429 | * virtual geometry. We currently pretend that we have a 2 heads | |
7430 | * 4 sectors (with a BIG number of cylinders...). This drives | |
7431 | * dosfs just mad... ;-) | |
7432 | */ | |
a885c8c4 CH |
7433 | static int md_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
7434 | { | |
fd01b88c | 7435 | struct mddev *mddev = bdev->bd_disk->private_data; |
a885c8c4 CH |
7436 | |
7437 | geo->heads = 2; | |
7438 | geo->sectors = 4; | |
49ce6cea | 7439 | geo->cylinders = mddev->array_sectors / 8; |
a885c8c4 CH |
7440 | return 0; |
7441 | } | |
7442 | ||
cb335f88 NS |
7443 | static inline bool md_ioctl_valid(unsigned int cmd) |
7444 | { | |
7445 | switch (cmd) { | |
7446 | case ADD_NEW_DISK: | |
cb335f88 NS |
7447 | case GET_ARRAY_INFO: |
7448 | case GET_BITMAP_FILE: | |
7449 | case GET_DISK_INFO: | |
7450 | case HOT_ADD_DISK: | |
7451 | case HOT_REMOVE_DISK: | |
cb335f88 NS |
7452 | case RAID_VERSION: |
7453 | case RESTART_ARRAY_RW: | |
7454 | case RUN_ARRAY: | |
7455 | case SET_ARRAY_INFO: | |
7456 | case SET_BITMAP_FILE: | |
7457 | case SET_DISK_FAULTY: | |
7458 | case STOP_ARRAY: | |
7459 | case STOP_ARRAY_RO: | |
1aee41f6 | 7460 | case CLUSTERED_DISK_NACK: |
cb335f88 NS |
7461 | return true; |
7462 | default: | |
7463 | return false; | |
7464 | } | |
7465 | } | |
7466 | ||
2f6d261e YB |
7467 | static int __md_set_array_info(struct mddev *mddev, void __user *argp) |
7468 | { | |
7469 | mdu_array_info_t info; | |
7470 | int err; | |
7471 | ||
7472 | if (!argp) | |
7473 | memset(&info, 0, sizeof(info)); | |
7474 | else if (copy_from_user(&info, argp, sizeof(info))) | |
7475 | return -EFAULT; | |
7476 | ||
7477 | if (mddev->pers) { | |
7478 | err = update_array_info(mddev, &info); | |
7479 | if (err) | |
7480 | pr_warn("md: couldn't update array info. %d\n", err); | |
7481 | return err; | |
7482 | } | |
7483 | ||
7484 | if (!list_empty(&mddev->disks)) { | |
7485 | pr_warn("md: array %s already has disks!\n", mdname(mddev)); | |
7486 | return -EBUSY; | |
7487 | } | |
7488 | ||
7489 | if (mddev->raid_disks) { | |
7490 | pr_warn("md: array %s already initialised!\n", mdname(mddev)); | |
7491 | return -EBUSY; | |
7492 | } | |
7493 | ||
7494 | err = md_set_array_info(mddev, &info); | |
7495 | if (err) | |
7496 | pr_warn("md: couldn't set array info. %d\n", err); | |
7497 | ||
7498 | return err; | |
7499 | } | |
7500 | ||
a39907fa | 7501 | static int md_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
7502 | unsigned int cmd, unsigned long arg) |
7503 | { | |
7504 | int err = 0; | |
7505 | void __user *argp = (void __user *)arg; | |
fd01b88c | 7506 | struct mddev *mddev = NULL; |
065e519e | 7507 | bool did_set_md_closing = false; |
1da177e4 | 7508 | |
cb335f88 NS |
7509 | if (!md_ioctl_valid(cmd)) |
7510 | return -ENOTTY; | |
7511 | ||
506c9e44 N |
7512 | switch (cmd) { |
7513 | case RAID_VERSION: | |
7514 | case GET_ARRAY_INFO: | |
7515 | case GET_DISK_INFO: | |
7516 | break; | |
7517 | default: | |
7518 | if (!capable(CAP_SYS_ADMIN)) | |
7519 | return -EACCES; | |
7520 | } | |
1da177e4 LT |
7521 | |
7522 | /* | |
7523 | * Commands dealing with the RAID driver but not any | |
7524 | * particular array: | |
7525 | */ | |
c02c0aeb N |
7526 | switch (cmd) { |
7527 | case RAID_VERSION: | |
7528 | err = get_version(argp); | |
3adc28d8 | 7529 | goto out; |
c02c0aeb | 7530 | default:; |
1da177e4 LT |
7531 | } |
7532 | ||
7533 | /* | |
7534 | * Commands creating/starting a new array: | |
7535 | */ | |
7536 | ||
a39907fa | 7537 | mddev = bdev->bd_disk->private_data; |
1da177e4 LT |
7538 | |
7539 | if (!mddev) { | |
7540 | BUG(); | |
3adc28d8 | 7541 | goto out; |
1da177e4 LT |
7542 | } |
7543 | ||
1ca69c4b N |
7544 | /* Some actions do not requires the mutex */ |
7545 | switch (cmd) { | |
7546 | case GET_ARRAY_INFO: | |
7547 | if (!mddev->raid_disks && !mddev->external) | |
7548 | err = -ENODEV; | |
7549 | else | |
7550 | err = get_array_info(mddev, argp); | |
3adc28d8 | 7551 | goto out; |
1ca69c4b N |
7552 | |
7553 | case GET_DISK_INFO: | |
7554 | if (!mddev->raid_disks && !mddev->external) | |
7555 | err = -ENODEV; | |
7556 | else | |
7557 | err = get_disk_info(mddev, argp); | |
3adc28d8 | 7558 | goto out; |
1ca69c4b N |
7559 | |
7560 | case SET_DISK_FAULTY: | |
7561 | err = set_disk_faulty(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7562 | goto out; |
4af1a041 N |
7563 | |
7564 | case GET_BITMAP_FILE: | |
7565 | err = get_bitmap_file(mddev, argp); | |
7566 | goto out; | |
7567 | ||
1ca69c4b N |
7568 | } |
7569 | ||
78b990cf | 7570 | if (cmd == ADD_NEW_DISK || cmd == HOT_ADD_DISK) |
cc1ffe61 | 7571 | flush_rdev_wq(mddev); |
a7a3f08d | 7572 | |
90f5f7ad HR |
7573 | if (cmd == HOT_REMOVE_DISK) |
7574 | /* need to ensure recovery thread has run */ | |
7575 | wait_event_interruptible_timeout(mddev->sb_wait, | |
7576 | !test_bit(MD_RECOVERY_NEEDED, | |
82a301cb | 7577 | &mddev->recovery), |
90f5f7ad | 7578 | msecs_to_jiffies(5000)); |
260fa034 N |
7579 | if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) { |
7580 | /* Need to flush page cache, and ensure no-one else opens | |
7581 | * and writes | |
7582 | */ | |
7583 | mutex_lock(&mddev->open_mutex); | |
9ba3b7f5 | 7584 | if (mddev->pers && atomic_read(&mddev->openers) > 1) { |
260fa034 N |
7585 | mutex_unlock(&mddev->open_mutex); |
7586 | err = -EBUSY; | |
3adc28d8 | 7587 | goto out; |
260fa034 | 7588 | } |
c731b84b DJ |
7589 | if (test_and_set_bit(MD_CLOSING, &mddev->flags)) { |
7590 | mutex_unlock(&mddev->open_mutex); | |
7591 | err = -EBUSY; | |
7592 | goto out; | |
7593 | } | |
065e519e | 7594 | did_set_md_closing = true; |
260fa034 N |
7595 | mutex_unlock(&mddev->open_mutex); |
7596 | sync_blockdev(bdev); | |
7597 | } | |
1da177e4 LT |
7598 | err = mddev_lock(mddev); |
7599 | if (err) { | |
9d48739e N |
7600 | pr_debug("md: ioctl lock interrupted, reason %d, cmd %d\n", |
7601 | err, cmd); | |
3adc28d8 | 7602 | goto out; |
1da177e4 LT |
7603 | } |
7604 | ||
c02c0aeb | 7605 | if (cmd == SET_ARRAY_INFO) { |
2f6d261e | 7606 | err = __md_set_array_info(mddev, argp); |
3adc28d8 | 7607 | goto unlock; |
1da177e4 LT |
7608 | } |
7609 | ||
7610 | /* | |
7611 | * Commands querying/configuring an existing array: | |
7612 | */ | |
32a7627c | 7613 | /* if we are not initialised yet, only ADD_NEW_DISK, STOP_ARRAY, |
3f9d7b0d | 7614 | * RUN_ARRAY, and GET_ and SET_BITMAP_FILE are allowed */ |
a17184a9 N |
7615 | if ((!mddev->raid_disks && !mddev->external) |
7616 | && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY | |
7617 | && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE | |
7618 | && cmd != GET_BITMAP_FILE) { | |
1da177e4 | 7619 | err = -ENODEV; |
3adc28d8 | 7620 | goto unlock; |
1da177e4 LT |
7621 | } |
7622 | ||
7623 | /* | |
7624 | * Commands even a read-only array can execute: | |
7625 | */ | |
c02c0aeb | 7626 | switch (cmd) { |
c02c0aeb N |
7627 | case RESTART_ARRAY_RW: |
7628 | err = restart_array(mddev); | |
3adc28d8 | 7629 | goto unlock; |
1da177e4 | 7630 | |
c02c0aeb N |
7631 | case STOP_ARRAY: |
7632 | err = do_md_stop(mddev, 0, bdev); | |
3adc28d8 | 7633 | goto unlock; |
1da177e4 | 7634 | |
c02c0aeb N |
7635 | case STOP_ARRAY_RO: |
7636 | err = md_set_readonly(mddev, bdev); | |
3adc28d8 | 7637 | goto unlock; |
1da177e4 | 7638 | |
3ea8929d N |
7639 | case HOT_REMOVE_DISK: |
7640 | err = hot_remove_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7641 | goto unlock; |
3ea8929d | 7642 | |
7ceb17e8 N |
7643 | case ADD_NEW_DISK: |
7644 | /* We can support ADD_NEW_DISK on read-only arrays | |
466ad292 | 7645 | * only if we are re-adding a preexisting device. |
7ceb17e8 N |
7646 | * So require mddev->pers and MD_DISK_SYNC. |
7647 | */ | |
7648 | if (mddev->pers) { | |
7649 | mdu_disk_info_t info; | |
7650 | if (copy_from_user(&info, argp, sizeof(info))) | |
7651 | err = -EFAULT; | |
7652 | else if (!(info.state & (1<<MD_DISK_SYNC))) | |
7653 | /* Need to clear read-only for this */ | |
7654 | break; | |
7655 | else | |
7e0adbfc | 7656 | err = md_add_new_disk(mddev, &info); |
3adc28d8 | 7657 | goto unlock; |
7ceb17e8 N |
7658 | } |
7659 | break; | |
1da177e4 LT |
7660 | } |
7661 | ||
7662 | /* | |
7663 | * The remaining ioctls are changing the state of the | |
f91de92e | 7664 | * superblock, so we do not allow them on read-only arrays. |
1da177e4 | 7665 | */ |
326eb17d | 7666 | if (mddev->ro && mddev->pers) { |
f91de92e N |
7667 | if (mddev->ro == 2) { |
7668 | mddev->ro = 0; | |
00bcb4ac | 7669 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 7670 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f3378b48 N |
7671 | /* mddev_unlock will wake thread */ |
7672 | /* If a device failed while we were read-only, we | |
7673 | * need to make sure the metadata is updated now. | |
7674 | */ | |
2953079c | 7675 | if (test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) { |
f3378b48 N |
7676 | mddev_unlock(mddev); |
7677 | wait_event(mddev->sb_wait, | |
2953079c SL |
7678 | !test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags) && |
7679 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); | |
29f097c4 | 7680 | mddev_lock_nointr(mddev); |
f3378b48 | 7681 | } |
f91de92e N |
7682 | } else { |
7683 | err = -EROFS; | |
3adc28d8 | 7684 | goto unlock; |
f91de92e | 7685 | } |
1da177e4 LT |
7686 | } |
7687 | ||
c02c0aeb N |
7688 | switch (cmd) { |
7689 | case ADD_NEW_DISK: | |
1da177e4 | 7690 | { |
c02c0aeb N |
7691 | mdu_disk_info_t info; |
7692 | if (copy_from_user(&info, argp, sizeof(info))) | |
7693 | err = -EFAULT; | |
7694 | else | |
7e0adbfc | 7695 | err = md_add_new_disk(mddev, &info); |
3adc28d8 | 7696 | goto unlock; |
c02c0aeb | 7697 | } |
1da177e4 | 7698 | |
1aee41f6 GR |
7699 | case CLUSTERED_DISK_NACK: |
7700 | if (mddev_is_clustered(mddev)) | |
7701 | md_cluster_ops->new_disk_ack(mddev, false); | |
7702 | else | |
7703 | err = -EINVAL; | |
7704 | goto unlock; | |
7705 | ||
c02c0aeb N |
7706 | case HOT_ADD_DISK: |
7707 | err = hot_add_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7708 | goto unlock; |
1da177e4 | 7709 | |
c02c0aeb N |
7710 | case RUN_ARRAY: |
7711 | err = do_md_run(mddev); | |
3adc28d8 | 7712 | goto unlock; |
1da177e4 | 7713 | |
c02c0aeb N |
7714 | case SET_BITMAP_FILE: |
7715 | err = set_bitmap_file(mddev, (int)arg); | |
3adc28d8 | 7716 | goto unlock; |
32a7627c | 7717 | |
c02c0aeb N |
7718 | default: |
7719 | err = -EINVAL; | |
3adc28d8 | 7720 | goto unlock; |
1da177e4 LT |
7721 | } |
7722 | ||
3adc28d8 | 7723 | unlock: |
d3374825 N |
7724 | if (mddev->hold_active == UNTIL_IOCTL && |
7725 | err != -EINVAL) | |
7726 | mddev->hold_active = 0; | |
1da177e4 | 7727 | mddev_unlock(mddev); |
3adc28d8 | 7728 | out: |
065e519e N |
7729 | if(did_set_md_closing) |
7730 | clear_bit(MD_CLOSING, &mddev->flags); | |
1da177e4 LT |
7731 | return err; |
7732 | } | |
aa98aa31 AB |
7733 | #ifdef CONFIG_COMPAT |
7734 | static int md_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
7735 | unsigned int cmd, unsigned long arg) | |
7736 | { | |
7737 | switch (cmd) { | |
7738 | case HOT_REMOVE_DISK: | |
7739 | case HOT_ADD_DISK: | |
7740 | case SET_DISK_FAULTY: | |
7741 | case SET_BITMAP_FILE: | |
7742 | /* These take in integer arg, do not convert */ | |
7743 | break; | |
7744 | default: | |
7745 | arg = (unsigned long)compat_ptr(arg); | |
7746 | break; | |
7747 | } | |
7748 | ||
7749 | return md_ioctl(bdev, mode, cmd, arg); | |
7750 | } | |
7751 | #endif /* CONFIG_COMPAT */ | |
1da177e4 | 7752 | |
118cf084 CH |
7753 | static int md_set_read_only(struct block_device *bdev, bool ro) |
7754 | { | |
7755 | struct mddev *mddev = bdev->bd_disk->private_data; | |
7756 | int err; | |
7757 | ||
7758 | err = mddev_lock(mddev); | |
7759 | if (err) | |
7760 | return err; | |
7761 | ||
7762 | if (!mddev->raid_disks && !mddev->external) { | |
7763 | err = -ENODEV; | |
7764 | goto out_unlock; | |
7765 | } | |
7766 | ||
7767 | /* | |
7768 | * Transitioning to read-auto need only happen for arrays that call | |
7769 | * md_write_start and which are not ready for writes yet. | |
7770 | */ | |
7771 | if (!ro && mddev->ro == 1 && mddev->pers) { | |
7772 | err = restart_array(mddev); | |
7773 | if (err) | |
7774 | goto out_unlock; | |
7775 | mddev->ro = 2; | |
7776 | } | |
7777 | ||
7778 | out_unlock: | |
7779 | mddev_unlock(mddev); | |
7780 | return err; | |
7781 | } | |
7782 | ||
a39907fa | 7783 | static int md_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 7784 | { |
5b26804b | 7785 | struct mddev *mddev; |
1da177e4 LT |
7786 | int err; |
7787 | ||
5b26804b CH |
7788 | spin_lock(&all_mddevs_lock); |
7789 | mddev = mddev_get(bdev->bd_disk->private_data); | |
7790 | spin_unlock(&all_mddevs_lock); | |
0c098220 YL |
7791 | if (!mddev) |
7792 | return -ENODEV; | |
7793 | ||
5b26804b CH |
7794 | err = mutex_lock_interruptible(&mddev->open_mutex); |
7795 | if (err) | |
1da177e4 LT |
7796 | goto out; |
7797 | ||
5b26804b CH |
7798 | err = -ENODEV; |
7799 | if (test_bit(MD_CLOSING, &mddev->flags)) | |
7800 | goto out_unlock; | |
af8d8e6f | 7801 | |
f2ea68cf | 7802 | atomic_inc(&mddev->openers); |
c8c00a69 | 7803 | mutex_unlock(&mddev->open_mutex); |
1da177e4 | 7804 | |
818077d6 | 7805 | bdev_check_media_change(bdev); |
5b26804b CH |
7806 | return 0; |
7807 | ||
7808 | out_unlock: | |
7809 | mutex_unlock(&mddev->open_mutex); | |
7810 | out: | |
7811 | mddev_put(mddev); | |
1da177e4 LT |
7812 | return err; |
7813 | } | |
7814 | ||
db2a144b | 7815 | static void md_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 7816 | { |
f72ffdd6 | 7817 | struct mddev *mddev = disk->private_data; |
1da177e4 | 7818 | |
52e5f9d1 | 7819 | BUG_ON(!mddev); |
f2ea68cf | 7820 | atomic_dec(&mddev->openers); |
1da177e4 | 7821 | mddev_put(mddev); |
1da177e4 | 7822 | } |
f0b4f7e2 | 7823 | |
a564e23f | 7824 | static unsigned int md_check_events(struct gendisk *disk, unsigned int clearing) |
f0b4f7e2 | 7825 | { |
fd01b88c | 7826 | struct mddev *mddev = disk->private_data; |
a564e23f | 7827 | unsigned int ret = 0; |
f0b4f7e2 | 7828 | |
a564e23f CH |
7829 | if (mddev->changed) |
7830 | ret = DISK_EVENT_MEDIA_CHANGE; | |
f0b4f7e2 | 7831 | mddev->changed = 0; |
a564e23f | 7832 | return ret; |
f0b4f7e2 | 7833 | } |
a564e23f | 7834 | |
e8c59ac4 CH |
7835 | static void md_free_disk(struct gendisk *disk) |
7836 | { | |
7837 | struct mddev *mddev = disk->private_data; | |
7838 | ||
7839 | percpu_ref_exit(&mddev->writes_pending); | |
7840 | bioset_exit(&mddev->bio_set); | |
7841 | bioset_exit(&mddev->sync_set); | |
7842 | ||
12a6caf2 | 7843 | mddev_free(mddev); |
e8c59ac4 CH |
7844 | } |
7845 | ||
7e0adbfc | 7846 | const struct block_device_operations md_fops = |
1da177e4 LT |
7847 | { |
7848 | .owner = THIS_MODULE, | |
c62b37d9 | 7849 | .submit_bio = md_submit_bio, |
a39907fa AV |
7850 | .open = md_open, |
7851 | .release = md_release, | |
b492b852 | 7852 | .ioctl = md_ioctl, |
aa98aa31 AB |
7853 | #ifdef CONFIG_COMPAT |
7854 | .compat_ioctl = md_compat_ioctl, | |
7855 | #endif | |
a885c8c4 | 7856 | .getgeo = md_getgeo, |
a564e23f | 7857 | .check_events = md_check_events, |
118cf084 | 7858 | .set_read_only = md_set_read_only, |
e8c59ac4 | 7859 | .free_disk = md_free_disk, |
1da177e4 LT |
7860 | }; |
7861 | ||
f72ffdd6 | 7862 | static int md_thread(void *arg) |
1da177e4 | 7863 | { |
2b8bf345 | 7864 | struct md_thread *thread = arg; |
1da177e4 | 7865 | |
1da177e4 LT |
7866 | /* |
7867 | * md_thread is a 'system-thread', it's priority should be very | |
7868 | * high. We avoid resource deadlocks individually in each | |
7869 | * raid personality. (RAID5 does preallocation) We also use RR and | |
7870 | * the very same RT priority as kswapd, thus we will never get | |
7871 | * into a priority inversion deadlock. | |
7872 | * | |
7873 | * we definitely have to have equal or higher priority than | |
7874 | * bdflush, otherwise bdflush will deadlock if there are too | |
7875 | * many dirty RAID5 blocks. | |
7876 | */ | |
1da177e4 | 7877 | |
6985c43f | 7878 | allow_signal(SIGKILL); |
a6fb0934 | 7879 | while (!kthread_should_stop()) { |
1da177e4 | 7880 | |
93588e22 N |
7881 | /* We need to wait INTERRUPTIBLE so that |
7882 | * we don't add to the load-average. | |
7883 | * That means we need to be sure no signals are | |
7884 | * pending | |
7885 | */ | |
7886 | if (signal_pending(current)) | |
7887 | flush_signals(current); | |
7888 | ||
7889 | wait_event_interruptible_timeout | |
7890 | (thread->wqueue, | |
7891 | test_bit(THREAD_WAKEUP, &thread->flags) | |
ce1ccd07 | 7892 | || kthread_should_stop() || kthread_should_park(), |
93588e22 | 7893 | thread->timeout); |
1da177e4 | 7894 | |
6c987910 | 7895 | clear_bit(THREAD_WAKEUP, &thread->flags); |
ce1ccd07 SL |
7896 | if (kthread_should_park()) |
7897 | kthread_parkme(); | |
6c987910 | 7898 | if (!kthread_should_stop()) |
4ed8731d | 7899 | thread->run(thread); |
1da177e4 | 7900 | } |
a6fb0934 | 7901 | |
1da177e4 LT |
7902 | return 0; |
7903 | } | |
7904 | ||
2b8bf345 | 7905 | void md_wakeup_thread(struct md_thread *thread) |
1da177e4 LT |
7906 | { |
7907 | if (thread) { | |
36a4e1fe | 7908 | pr_debug("md: waking up MD thread %s.\n", thread->tsk->comm); |
d1d90147 GJ |
7909 | set_bit(THREAD_WAKEUP, &thread->flags); |
7910 | wake_up(&thread->wqueue); | |
1da177e4 LT |
7911 | } |
7912 | } | |
6c144d31 | 7913 | EXPORT_SYMBOL(md_wakeup_thread); |
1da177e4 | 7914 | |
4ed8731d SL |
7915 | struct md_thread *md_register_thread(void (*run) (struct md_thread *), |
7916 | struct mddev *mddev, const char *name) | |
1da177e4 | 7917 | { |
2b8bf345 | 7918 | struct md_thread *thread; |
1da177e4 | 7919 | |
2b8bf345 | 7920 | thread = kzalloc(sizeof(struct md_thread), GFP_KERNEL); |
1da177e4 LT |
7921 | if (!thread) |
7922 | return NULL; | |
7923 | ||
1da177e4 LT |
7924 | init_waitqueue_head(&thread->wqueue); |
7925 | ||
1da177e4 LT |
7926 | thread->run = run; |
7927 | thread->mddev = mddev; | |
32a7627c | 7928 | thread->timeout = MAX_SCHEDULE_TIMEOUT; |
0da3c619 N |
7929 | thread->tsk = kthread_run(md_thread, thread, |
7930 | "%s_%s", | |
7931 | mdname(thread->mddev), | |
0232605d | 7932 | name); |
a6fb0934 | 7933 | if (IS_ERR(thread->tsk)) { |
1da177e4 LT |
7934 | kfree(thread); |
7935 | return NULL; | |
7936 | } | |
1da177e4 LT |
7937 | return thread; |
7938 | } | |
6c144d31 | 7939 | EXPORT_SYMBOL(md_register_thread); |
1da177e4 | 7940 | |
2b8bf345 | 7941 | void md_unregister_thread(struct md_thread **threadp) |
1da177e4 | 7942 | { |
1e267742 GJ |
7943 | struct md_thread *thread; |
7944 | ||
7945 | /* | |
7946 | * Locking ensures that mddev_unlock does not wake_up a | |
01f96c0a N |
7947 | * non-existent thread |
7948 | */ | |
7949 | spin_lock(&pers_lock); | |
1e267742 GJ |
7950 | thread = *threadp; |
7951 | if (!thread) { | |
7952 | spin_unlock(&pers_lock); | |
7953 | return; | |
7954 | } | |
01f96c0a N |
7955 | *threadp = NULL; |
7956 | spin_unlock(&pers_lock); | |
a6fb0934 | 7957 | |
1e267742 | 7958 | pr_debug("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk)); |
a6fb0934 | 7959 | kthread_stop(thread->tsk); |
1da177e4 LT |
7960 | kfree(thread); |
7961 | } | |
6c144d31 | 7962 | EXPORT_SYMBOL(md_unregister_thread); |
1da177e4 | 7963 | |
fd01b88c | 7964 | void md_error(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 7965 | { |
b2d444d7 | 7966 | if (!rdev || test_bit(Faulty, &rdev->flags)) |
1da177e4 | 7967 | return; |
6bfe0b49 | 7968 | |
de393cde | 7969 | if (!mddev->pers || !mddev->pers->error_handler) |
1da177e4 | 7970 | return; |
9631abdb MT |
7971 | mddev->pers->error_handler(mddev, rdev); |
7972 | ||
7973 | if (mddev->degraded && !test_bit(MD_BROKEN, &mddev->flags)) | |
72a23c21 | 7974 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
00bcb4ac | 7975 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 | 7976 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
9631abdb MT |
7977 | if (!test_bit(MD_BROKEN, &mddev->flags)) { |
7978 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7979 | md_wakeup_thread(mddev->thread); | |
7980 | } | |
768a418d | 7981 | if (mddev->event_work.func) |
e804ac78 | 7982 | queue_work(md_misc_wq, &mddev->event_work); |
54679486 | 7983 | md_new_event(); |
1da177e4 | 7984 | } |
6c144d31 | 7985 | EXPORT_SYMBOL(md_error); |
1da177e4 LT |
7986 | |
7987 | /* seq_file implementation /proc/mdstat */ | |
7988 | ||
7989 | static void status_unused(struct seq_file *seq) | |
7990 | { | |
7991 | int i = 0; | |
3cb03002 | 7992 | struct md_rdev *rdev; |
1da177e4 LT |
7993 | |
7994 | seq_printf(seq, "unused devices: "); | |
7995 | ||
159ec1fc | 7996 | list_for_each_entry(rdev, &pending_raid_disks, same_set) { |
1da177e4 | 7997 | i++; |
913cce5a | 7998 | seq_printf(seq, "%pg ", rdev->bdev); |
1da177e4 LT |
7999 | } |
8000 | if (!i) | |
8001 | seq_printf(seq, "<none>"); | |
8002 | ||
8003 | seq_printf(seq, "\n"); | |
8004 | } | |
8005 | ||
f7851be7 | 8006 | static int status_resync(struct seq_file *seq, struct mddev *mddev) |
1da177e4 | 8007 | { |
dd71cf6b | 8008 | sector_t max_sectors, resync, res; |
9642fa73 MT |
8009 | unsigned long dt, db = 0; |
8010 | sector_t rt, curr_mark_cnt, resync_mark_cnt; | |
8011 | int scale, recovery_active; | |
4588b42e | 8012 | unsigned int per_milli; |
1da177e4 | 8013 | |
c804cdec N |
8014 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8015 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
dd71cf6b | 8016 | max_sectors = mddev->resync_max_sectors; |
1da177e4 | 8017 | else |
dd71cf6b | 8018 | max_sectors = mddev->dev_sectors; |
1da177e4 | 8019 | |
f7851be7 | 8020 | resync = mddev->curr_resync; |
eac58d08 | 8021 | if (resync < MD_RESYNC_ACTIVE) { |
f7851be7 N |
8022 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) |
8023 | /* Still cleaning up */ | |
8024 | resync = max_sectors; | |
b368856a | 8025 | } else if (resync > max_sectors) { |
d2e2ec82 | 8026 | resync = max_sectors; |
b368856a | 8027 | } else { |
f7851be7 | 8028 | resync -= atomic_read(&mddev->recovery_active); |
b368856a LG |
8029 | if (resync < MD_RESYNC_ACTIVE) { |
8030 | /* | |
8031 | * Resync has started, but the subtraction has | |
8032 | * yielded one of the special values. Force it | |
8033 | * to active to ensure the status reports an | |
8034 | * active resync. | |
8035 | */ | |
8036 | resync = MD_RESYNC_ACTIVE; | |
8037 | } | |
8038 | } | |
f7851be7 | 8039 | |
eac58d08 | 8040 | if (resync == MD_RESYNC_NONE) { |
0357ba27 GJ |
8041 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery)) { |
8042 | struct md_rdev *rdev; | |
8043 | ||
8044 | rdev_for_each(rdev, mddev) | |
8045 | if (rdev->raid_disk >= 0 && | |
8046 | !test_bit(Faulty, &rdev->flags) && | |
8047 | rdev->recovery_offset != MaxSector && | |
8048 | rdev->recovery_offset) { | |
8049 | seq_printf(seq, "\trecover=REMOTE"); | |
8050 | return 1; | |
8051 | } | |
8052 | if (mddev->reshape_position != MaxSector) | |
8053 | seq_printf(seq, "\treshape=REMOTE"); | |
8054 | else | |
8055 | seq_printf(seq, "\tresync=REMOTE"); | |
8056 | return 1; | |
8057 | } | |
f7851be7 N |
8058 | if (mddev->recovery_cp < MaxSector) { |
8059 | seq_printf(seq, "\tresync=PENDING"); | |
8060 | return 1; | |
8061 | } | |
8062 | return 0; | |
8063 | } | |
eac58d08 | 8064 | if (resync < MD_RESYNC_ACTIVE) { |
f7851be7 N |
8065 | seq_printf(seq, "\tresync=DELAYED"); |
8066 | return 1; | |
8067 | } | |
8068 | ||
403df478 | 8069 | WARN_ON(max_sectors == 0); |
4588b42e | 8070 | /* Pick 'scale' such that (resync>>scale)*1000 will fit |
dd71cf6b | 8071 | * in a sector_t, and (max_sectors>>scale) will fit in a |
4588b42e N |
8072 | * u32, as those are the requirements for sector_div. |
8073 | * Thus 'scale' must be at least 10 | |
8074 | */ | |
8075 | scale = 10; | |
8076 | if (sizeof(sector_t) > sizeof(unsigned long)) { | |
dd71cf6b | 8077 | while ( max_sectors/2 > (1ULL<<(scale+32))) |
4588b42e N |
8078 | scale++; |
8079 | } | |
8080 | res = (resync>>scale)*1000; | |
dd71cf6b | 8081 | sector_div(res, (u32)((max_sectors>>scale)+1)); |
4588b42e N |
8082 | |
8083 | per_milli = res; | |
1da177e4 | 8084 | { |
4588b42e | 8085 | int i, x = per_milli/50, y = 20-x; |
1da177e4 LT |
8086 | seq_printf(seq, "["); |
8087 | for (i = 0; i < x; i++) | |
8088 | seq_printf(seq, "="); | |
8089 | seq_printf(seq, ">"); | |
8090 | for (i = 0; i < y; i++) | |
8091 | seq_printf(seq, "."); | |
8092 | seq_printf(seq, "] "); | |
8093 | } | |
4588b42e | 8094 | seq_printf(seq, " %s =%3u.%u%% (%llu/%llu)", |
ccfcc3c1 N |
8095 | (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)? |
8096 | "reshape" : | |
61df9d91 N |
8097 | (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)? |
8098 | "check" : | |
8099 | (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? | |
8100 | "resync" : "recovery"))), | |
8101 | per_milli/10, per_milli % 10, | |
dd71cf6b N |
8102 | (unsigned long long) resync/2, |
8103 | (unsigned long long) max_sectors/2); | |
1da177e4 LT |
8104 | |
8105 | /* | |
1da177e4 LT |
8106 | * dt: time from mark until now |
8107 | * db: blocks written from mark until now | |
8108 | * rt: remaining time | |
dd71cf6b | 8109 | * |
9642fa73 MT |
8110 | * rt is a sector_t, which is always 64bit now. We are keeping |
8111 | * the original algorithm, but it is not really necessary. | |
8112 | * | |
8113 | * Original algorithm: | |
8114 | * So we divide before multiply in case it is 32bit and close | |
8115 | * to the limit. | |
8116 | * We scale the divisor (db) by 32 to avoid losing precision | |
8117 | * near the end of resync when the number of remaining sectors | |
8118 | * is close to 'db'. | |
8119 | * We then divide rt by 32 after multiplying by db to compensate. | |
8120 | * The '+1' avoids division by zero if db is very small. | |
1da177e4 LT |
8121 | */ |
8122 | dt = ((jiffies - mddev->resync_mark) / HZ); | |
8123 | if (!dt) dt++; | |
9642fa73 MT |
8124 | |
8125 | curr_mark_cnt = mddev->curr_mark_cnt; | |
8126 | recovery_active = atomic_read(&mddev->recovery_active); | |
8127 | resync_mark_cnt = mddev->resync_mark_cnt; | |
8128 | ||
8129 | if (curr_mark_cnt >= (recovery_active + resync_mark_cnt)) | |
8130 | db = curr_mark_cnt - (recovery_active + resync_mark_cnt); | |
1da177e4 | 8131 | |
dd71cf6b | 8132 | rt = max_sectors - resync; /* number of remaining sectors */ |
9642fa73 | 8133 | rt = div64_u64(rt, db/32+1); |
dd71cf6b N |
8134 | rt *= dt; |
8135 | rt >>= 5; | |
8136 | ||
8137 | seq_printf(seq, " finish=%lu.%lumin", (unsigned long)rt / 60, | |
8138 | ((unsigned long)rt % 60)/6); | |
1da177e4 | 8139 | |
ff4e8d9a | 8140 | seq_printf(seq, " speed=%ldK/sec", db/2/dt); |
f7851be7 | 8141 | return 1; |
1da177e4 LT |
8142 | } |
8143 | ||
8144 | static void *md_seq_start(struct seq_file *seq, loff_t *pos) | |
8145 | { | |
8146 | struct list_head *tmp; | |
8147 | loff_t l = *pos; | |
fd01b88c | 8148 | struct mddev *mddev; |
1da177e4 | 8149 | |
7abfabaf JG |
8150 | if (l == 0x10000) { |
8151 | ++*pos; | |
8152 | return (void *)2; | |
8153 | } | |
8154 | if (l > 0x10000) | |
1da177e4 LT |
8155 | return NULL; |
8156 | if (!l--) | |
8157 | /* header */ | |
8158 | return (void*)1; | |
8159 | ||
8160 | spin_lock(&all_mddevs_lock); | |
8161 | list_for_each(tmp,&all_mddevs) | |
8162 | if (!l--) { | |
fd01b88c | 8163 | mddev = list_entry(tmp, struct mddev, all_mddevs); |
12a6caf2 CH |
8164 | if (!mddev_get(mddev)) |
8165 | continue; | |
1da177e4 LT |
8166 | spin_unlock(&all_mddevs_lock); |
8167 | return mddev; | |
8168 | } | |
8169 | spin_unlock(&all_mddevs_lock); | |
8170 | if (!l--) | |
8171 | return (void*)2;/* tail */ | |
8172 | return NULL; | |
8173 | } | |
8174 | ||
8175 | static void *md_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
8176 | { | |
8177 | struct list_head *tmp; | |
fd01b88c | 8178 | struct mddev *next_mddev, *mddev = v; |
12a6caf2 | 8179 | struct mddev *to_put = NULL; |
f72ffdd6 | 8180 | |
1da177e4 LT |
8181 | ++*pos; |
8182 | if (v == (void*)2) | |
8183 | return NULL; | |
8184 | ||
8185 | spin_lock(&all_mddevs_lock); | |
12a6caf2 | 8186 | if (v == (void*)1) { |
1da177e4 | 8187 | tmp = all_mddevs.next; |
12a6caf2 CH |
8188 | } else { |
8189 | to_put = mddev; | |
1da177e4 | 8190 | tmp = mddev->all_mddevs.next; |
f72ffdd6 | 8191 | } |
12a6caf2 CH |
8192 | |
8193 | for (;;) { | |
8194 | if (tmp == &all_mddevs) { | |
8195 | next_mddev = (void*)2; | |
8196 | *pos = 0x10000; | |
8197 | break; | |
8198 | } | |
8199 | next_mddev = list_entry(tmp, struct mddev, all_mddevs); | |
8200 | if (mddev_get(next_mddev)) | |
8201 | break; | |
8202 | mddev = next_mddev; | |
8203 | tmp = mddev->all_mddevs.next; | |
c0250d16 | 8204 | } |
1da177e4 LT |
8205 | spin_unlock(&all_mddevs_lock); |
8206 | ||
12a6caf2 | 8207 | if (to_put) |
1da177e4 LT |
8208 | mddev_put(mddev); |
8209 | return next_mddev; | |
8210 | ||
8211 | } | |
8212 | ||
8213 | static void md_seq_stop(struct seq_file *seq, void *v) | |
8214 | { | |
fd01b88c | 8215 | struct mddev *mddev = v; |
1da177e4 LT |
8216 | |
8217 | if (mddev && v != (void*)1 && v != (void*)2) | |
8218 | mddev_put(mddev); | |
8219 | } | |
8220 | ||
8221 | static int md_seq_show(struct seq_file *seq, void *v) | |
8222 | { | |
fd01b88c | 8223 | struct mddev *mddev = v; |
dd8ac336 | 8224 | sector_t sectors; |
3cb03002 | 8225 | struct md_rdev *rdev; |
1da177e4 LT |
8226 | |
8227 | if (v == (void*)1) { | |
84fc4b56 | 8228 | struct md_personality *pers; |
1da177e4 LT |
8229 | seq_printf(seq, "Personalities : "); |
8230 | spin_lock(&pers_lock); | |
2604b703 N |
8231 | list_for_each_entry(pers, &pers_list, list) |
8232 | seq_printf(seq, "[%s] ", pers->name); | |
1da177e4 LT |
8233 | |
8234 | spin_unlock(&pers_lock); | |
8235 | seq_printf(seq, "\n"); | |
f1514638 | 8236 | seq->poll_event = atomic_read(&md_event_count); |
1da177e4 LT |
8237 | return 0; |
8238 | } | |
8239 | if (v == (void*)2) { | |
8240 | status_unused(seq); | |
8241 | return 0; | |
8242 | } | |
8243 | ||
36d091f4 | 8244 | spin_lock(&mddev->lock); |
1da177e4 LT |
8245 | if (mddev->pers || mddev->raid_disks || !list_empty(&mddev->disks)) { |
8246 | seq_printf(seq, "%s : %sactive", mdname(mddev), | |
8247 | mddev->pers ? "" : "in"); | |
8248 | if (mddev->pers) { | |
f91de92e | 8249 | if (mddev->ro==1) |
1da177e4 | 8250 | seq_printf(seq, " (read-only)"); |
f91de92e | 8251 | if (mddev->ro==2) |
52720ae7 | 8252 | seq_printf(seq, " (auto-read-only)"); |
1da177e4 LT |
8253 | seq_printf(seq, " %s", mddev->pers->name); |
8254 | } | |
8255 | ||
dd8ac336 | 8256 | sectors = 0; |
f97fcad3 N |
8257 | rcu_read_lock(); |
8258 | rdev_for_each_rcu(rdev, mddev) { | |
913cce5a CH |
8259 | seq_printf(seq, " %pg[%d]", rdev->bdev, rdev->desc_nr); |
8260 | ||
8ddf9efe N |
8261 | if (test_bit(WriteMostly, &rdev->flags)) |
8262 | seq_printf(seq, "(W)"); | |
9efdca16 SL |
8263 | if (test_bit(Journal, &rdev->flags)) |
8264 | seq_printf(seq, "(J)"); | |
b2d444d7 | 8265 | if (test_bit(Faulty, &rdev->flags)) { |
1da177e4 LT |
8266 | seq_printf(seq, "(F)"); |
8267 | continue; | |
2d78f8c4 N |
8268 | } |
8269 | if (rdev->raid_disk < 0) | |
b325a32e | 8270 | seq_printf(seq, "(S)"); /* spare */ |
2d78f8c4 N |
8271 | if (test_bit(Replacement, &rdev->flags)) |
8272 | seq_printf(seq, "(R)"); | |
dd8ac336 | 8273 | sectors += rdev->sectors; |
1da177e4 | 8274 | } |
f97fcad3 | 8275 | rcu_read_unlock(); |
1da177e4 LT |
8276 | |
8277 | if (!list_empty(&mddev->disks)) { | |
8278 | if (mddev->pers) | |
8279 | seq_printf(seq, "\n %llu blocks", | |
f233ea5c AN |
8280 | (unsigned long long) |
8281 | mddev->array_sectors / 2); | |
1da177e4 LT |
8282 | else |
8283 | seq_printf(seq, "\n %llu blocks", | |
dd8ac336 | 8284 | (unsigned long long)sectors / 2); |
1da177e4 | 8285 | } |
1cd6bf19 N |
8286 | if (mddev->persistent) { |
8287 | if (mddev->major_version != 0 || | |
8288 | mddev->minor_version != 90) { | |
8289 | seq_printf(seq," super %d.%d", | |
8290 | mddev->major_version, | |
8291 | mddev->minor_version); | |
8292 | } | |
e691063a N |
8293 | } else if (mddev->external) |
8294 | seq_printf(seq, " super external:%s", | |
8295 | mddev->metadata_type); | |
8296 | else | |
1cd6bf19 | 8297 | seq_printf(seq, " super non-persistent"); |
1da177e4 LT |
8298 | |
8299 | if (mddev->pers) { | |
d710e138 | 8300 | mddev->pers->status(seq, mddev); |
f72ffdd6 | 8301 | seq_printf(seq, "\n "); |
8e1b39d6 | 8302 | if (mddev->pers->sync_request) { |
f7851be7 | 8303 | if (status_resync(seq, mddev)) |
8e1b39d6 | 8304 | seq_printf(seq, "\n "); |
8e1b39d6 | 8305 | } |
32a7627c N |
8306 | } else |
8307 | seq_printf(seq, "\n "); | |
8308 | ||
e64e4018 | 8309 | md_bitmap_status(seq, mddev->bitmap); |
1da177e4 LT |
8310 | |
8311 | seq_printf(seq, "\n"); | |
8312 | } | |
36d091f4 | 8313 | spin_unlock(&mddev->lock); |
f72ffdd6 | 8314 | |
1da177e4 LT |
8315 | return 0; |
8316 | } | |
8317 | ||
110518bc | 8318 | static const struct seq_operations md_seq_ops = { |
1da177e4 LT |
8319 | .start = md_seq_start, |
8320 | .next = md_seq_next, | |
8321 | .stop = md_seq_stop, | |
8322 | .show = md_seq_show, | |
8323 | }; | |
8324 | ||
8325 | static int md_seq_open(struct inode *inode, struct file *file) | |
8326 | { | |
f1514638 | 8327 | struct seq_file *seq; |
1da177e4 LT |
8328 | int error; |
8329 | ||
8330 | error = seq_open(file, &md_seq_ops); | |
d7603b7e | 8331 | if (error) |
f1514638 KS |
8332 | return error; |
8333 | ||
8334 | seq = file->private_data; | |
8335 | seq->poll_event = atomic_read(&md_event_count); | |
1da177e4 LT |
8336 | return error; |
8337 | } | |
8338 | ||
e2f23b60 | 8339 | static int md_unloading; |
afc9a42b | 8340 | static __poll_t mdstat_poll(struct file *filp, poll_table *wait) |
d7603b7e | 8341 | { |
f1514638 | 8342 | struct seq_file *seq = filp->private_data; |
afc9a42b | 8343 | __poll_t mask; |
d7603b7e | 8344 | |
e2f23b60 | 8345 | if (md_unloading) |
a9a08845 | 8346 | return EPOLLIN|EPOLLRDNORM|EPOLLERR|EPOLLPRI; |
d7603b7e N |
8347 | poll_wait(filp, &md_event_waiters, wait); |
8348 | ||
8349 | /* always allow read */ | |
a9a08845 | 8350 | mask = EPOLLIN | EPOLLRDNORM; |
d7603b7e | 8351 | |
f1514638 | 8352 | if (seq->poll_event != atomic_read(&md_event_count)) |
a9a08845 | 8353 | mask |= EPOLLERR | EPOLLPRI; |
d7603b7e N |
8354 | return mask; |
8355 | } | |
8356 | ||
97a32539 AD |
8357 | static const struct proc_ops mdstat_proc_ops = { |
8358 | .proc_open = md_seq_open, | |
8359 | .proc_read = seq_read, | |
8360 | .proc_lseek = seq_lseek, | |
8361 | .proc_release = seq_release, | |
8362 | .proc_poll = mdstat_poll, | |
1da177e4 LT |
8363 | }; |
8364 | ||
84fc4b56 | 8365 | int register_md_personality(struct md_personality *p) |
1da177e4 | 8366 | { |
9d48739e N |
8367 | pr_debug("md: %s personality registered for level %d\n", |
8368 | p->name, p->level); | |
1da177e4 | 8369 | spin_lock(&pers_lock); |
2604b703 | 8370 | list_add_tail(&p->list, &pers_list); |
1da177e4 LT |
8371 | spin_unlock(&pers_lock); |
8372 | return 0; | |
8373 | } | |
6c144d31 | 8374 | EXPORT_SYMBOL(register_md_personality); |
1da177e4 | 8375 | |
84fc4b56 | 8376 | int unregister_md_personality(struct md_personality *p) |
1da177e4 | 8377 | { |
9d48739e | 8378 | pr_debug("md: %s personality unregistered\n", p->name); |
1da177e4 | 8379 | spin_lock(&pers_lock); |
2604b703 | 8380 | list_del_init(&p->list); |
1da177e4 LT |
8381 | spin_unlock(&pers_lock); |
8382 | return 0; | |
8383 | } | |
6c144d31 | 8384 | EXPORT_SYMBOL(unregister_md_personality); |
1da177e4 | 8385 | |
6022e75b N |
8386 | int register_md_cluster_operations(struct md_cluster_operations *ops, |
8387 | struct module *module) | |
edb39c9d | 8388 | { |
6022e75b | 8389 | int ret = 0; |
edb39c9d | 8390 | spin_lock(&pers_lock); |
6022e75b N |
8391 | if (md_cluster_ops != NULL) |
8392 | ret = -EALREADY; | |
8393 | else { | |
8394 | md_cluster_ops = ops; | |
8395 | md_cluster_mod = module; | |
8396 | } | |
edb39c9d | 8397 | spin_unlock(&pers_lock); |
6022e75b | 8398 | return ret; |
edb39c9d GR |
8399 | } |
8400 | EXPORT_SYMBOL(register_md_cluster_operations); | |
8401 | ||
8402 | int unregister_md_cluster_operations(void) | |
8403 | { | |
8404 | spin_lock(&pers_lock); | |
8405 | md_cluster_ops = NULL; | |
8406 | spin_unlock(&pers_lock); | |
8407 | return 0; | |
8408 | } | |
8409 | EXPORT_SYMBOL(unregister_md_cluster_operations); | |
8410 | ||
8411 | int md_setup_cluster(struct mddev *mddev, int nodes) | |
8412 | { | |
7c9d5c54 | 8413 | int ret; |
47a7b0d8 GJ |
8414 | if (!md_cluster_ops) |
8415 | request_module("md-cluster"); | |
edb39c9d | 8416 | spin_lock(&pers_lock); |
47a7b0d8 | 8417 | /* ensure module won't be unloaded */ |
edb39c9d | 8418 | if (!md_cluster_ops || !try_module_get(md_cluster_mod)) { |
dd3dc5f4 | 8419 | pr_warn("can't find md-cluster module or get its reference.\n"); |
edb39c9d GR |
8420 | spin_unlock(&pers_lock); |
8421 | return -ENOENT; | |
8422 | } | |
8423 | spin_unlock(&pers_lock); | |
8424 | ||
7c9d5c54 ZH |
8425 | ret = md_cluster_ops->join(mddev, nodes); |
8426 | if (!ret) | |
8427 | mddev->safemode_delay = 0; | |
8428 | return ret; | |
edb39c9d GR |
8429 | } |
8430 | ||
8431 | void md_cluster_stop(struct mddev *mddev) | |
8432 | { | |
c4ce867f GR |
8433 | if (!md_cluster_ops) |
8434 | return; | |
edb39c9d GR |
8435 | md_cluster_ops->leave(mddev); |
8436 | module_put(md_cluster_mod); | |
8437 | } | |
8438 | ||
fd01b88c | 8439 | static int is_mddev_idle(struct mddev *mddev, int init) |
1da177e4 | 8440 | { |
f72ffdd6 | 8441 | struct md_rdev *rdev; |
1da177e4 | 8442 | int idle; |
eea1bf38 | 8443 | int curr_events; |
1da177e4 LT |
8444 | |
8445 | idle = 1; | |
4b80991c N |
8446 | rcu_read_lock(); |
8447 | rdev_for_each_rcu(rdev, mddev) { | |
4245e52d | 8448 | struct gendisk *disk = rdev->bdev->bd_disk; |
8446fe92 | 8449 | curr_events = (int)part_stat_read_accum(disk->part0, sectors) - |
eea1bf38 | 8450 | atomic_read(&disk->sync_io); |
713f6ab1 N |
8451 | /* sync IO will cause sync_io to increase before the disk_stats |
8452 | * as sync_io is counted when a request starts, and | |
8453 | * disk_stats is counted when it completes. | |
8454 | * So resync activity will cause curr_events to be smaller than | |
8455 | * when there was no such activity. | |
8456 | * non-sync IO will cause disk_stat to increase without | |
8457 | * increasing sync_io so curr_events will (eventually) | |
8458 | * be larger than it was before. Once it becomes | |
8459 | * substantially larger, the test below will cause | |
8460 | * the array to appear non-idle, and resync will slow | |
8461 | * down. | |
8462 | * If there is a lot of outstanding resync activity when | |
8463 | * we set last_event to curr_events, then all that activity | |
8464 | * completing might cause the array to appear non-idle | |
8465 | * and resync will be slowed down even though there might | |
8466 | * not have been non-resync activity. This will only | |
8467 | * happen once though. 'last_events' will soon reflect | |
8468 | * the state where there is little or no outstanding | |
8469 | * resync requests, and further resync activity will | |
8470 | * always make curr_events less than last_events. | |
c0e48521 | 8471 | * |
1da177e4 | 8472 | */ |
eea1bf38 | 8473 | if (init || curr_events - rdev->last_events > 64) { |
1da177e4 LT |
8474 | rdev->last_events = curr_events; |
8475 | idle = 0; | |
8476 | } | |
8477 | } | |
4b80991c | 8478 | rcu_read_unlock(); |
1da177e4 LT |
8479 | return idle; |
8480 | } | |
8481 | ||
fd01b88c | 8482 | void md_done_sync(struct mddev *mddev, int blocks, int ok) |
1da177e4 LT |
8483 | { |
8484 | /* another "blocks" (512byte) blocks have been synced */ | |
8485 | atomic_sub(blocks, &mddev->recovery_active); | |
8486 | wake_up(&mddev->recovery_wait); | |
8487 | if (!ok) { | |
dfc70645 | 8488 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
0a19caab | 8489 | set_bit(MD_RECOVERY_ERROR, &mddev->recovery); |
1da177e4 LT |
8490 | md_wakeup_thread(mddev->thread); |
8491 | // stop recovery, signal do_sync .... | |
8492 | } | |
8493 | } | |
6c144d31 | 8494 | EXPORT_SYMBOL(md_done_sync); |
1da177e4 | 8495 | |
06d91a5f N |
8496 | /* md_write_start(mddev, bi) |
8497 | * If we need to update some array metadata (e.g. 'active' flag | |
3d310eb7 N |
8498 | * in superblock) before writing, schedule a superblock update |
8499 | * and wait for it to complete. | |
cc27b0c7 N |
8500 | * A return value of 'false' means that the write wasn't recorded |
8501 | * and cannot proceed as the array is being suspend. | |
06d91a5f | 8502 | */ |
cc27b0c7 | 8503 | bool md_write_start(struct mddev *mddev, struct bio *bi) |
1da177e4 | 8504 | { |
0fd62b86 | 8505 | int did_change = 0; |
4b6c1060 | 8506 | |
06d91a5f | 8507 | if (bio_data_dir(bi) != WRITE) |
cc27b0c7 | 8508 | return true; |
06d91a5f | 8509 | |
f91de92e N |
8510 | BUG_ON(mddev->ro == 1); |
8511 | if (mddev->ro == 2) { | |
8512 | /* need to switch to read/write */ | |
8513 | mddev->ro = 0; | |
8514 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8515 | md_wakeup_thread(mddev->thread); | |
25156198 | 8516 | md_wakeup_thread(mddev->sync_thread); |
0fd62b86 | 8517 | did_change = 1; |
f91de92e | 8518 | } |
4ad23a97 N |
8519 | rcu_read_lock(); |
8520 | percpu_ref_get(&mddev->writes_pending); | |
55cc39f3 | 8521 | smp_mb(); /* Match smp_mb in set_in_sync() */ |
31a59e34 N |
8522 | if (mddev->safemode == 1) |
8523 | mddev->safemode = 0; | |
4ad23a97 | 8524 | /* sync_checkers is always 0 when writes_pending is in per-cpu mode */ |
81fe48e9 | 8525 | if (mddev->in_sync || mddev->sync_checkers) { |
85572d7c | 8526 | spin_lock(&mddev->lock); |
3d310eb7 N |
8527 | if (mddev->in_sync) { |
8528 | mddev->in_sync = 0; | |
2953079c SL |
8529 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8530 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
3d310eb7 | 8531 | md_wakeup_thread(mddev->thread); |
0fd62b86 | 8532 | did_change = 1; |
3d310eb7 | 8533 | } |
85572d7c | 8534 | spin_unlock(&mddev->lock); |
06d91a5f | 8535 | } |
4ad23a97 | 8536 | rcu_read_unlock(); |
0fd62b86 | 8537 | if (did_change) |
00bcb4ac | 8538 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
4b6c1060 HM |
8539 | if (!mddev->has_superblocks) |
8540 | return true; | |
09a44cc1 | 8541 | wait_event(mddev->sb_wait, |
d47c8ad2 N |
8542 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags) || |
8543 | mddev->suspended); | |
cc27b0c7 N |
8544 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) { |
8545 | percpu_ref_put(&mddev->writes_pending); | |
8546 | return false; | |
8547 | } | |
8548 | return true; | |
1da177e4 | 8549 | } |
6c144d31 | 8550 | EXPORT_SYMBOL(md_write_start); |
1da177e4 | 8551 | |
49728050 N |
8552 | /* md_write_inc can only be called when md_write_start() has |
8553 | * already been called at least once of the current request. | |
8554 | * It increments the counter and is useful when a single request | |
8555 | * is split into several parts. Each part causes an increment and | |
8556 | * so needs a matching md_write_end(). | |
8557 | * Unlike md_write_start(), it is safe to call md_write_inc() inside | |
8558 | * a spinlocked region. | |
8559 | */ | |
8560 | void md_write_inc(struct mddev *mddev, struct bio *bi) | |
8561 | { | |
8562 | if (bio_data_dir(bi) != WRITE) | |
8563 | return; | |
8564 | WARN_ON_ONCE(mddev->in_sync || mddev->ro); | |
4ad23a97 | 8565 | percpu_ref_get(&mddev->writes_pending); |
49728050 N |
8566 | } |
8567 | EXPORT_SYMBOL(md_write_inc); | |
8568 | ||
fd01b88c | 8569 | void md_write_end(struct mddev *mddev) |
1da177e4 | 8570 | { |
4ad23a97 N |
8571 | percpu_ref_put(&mddev->writes_pending); |
8572 | ||
8573 | if (mddev->safemode == 2) | |
8574 | md_wakeup_thread(mddev->thread); | |
8575 | else if (mddev->safemode_delay) | |
8576 | /* The roundup() ensures this only performs locking once | |
8577 | * every ->safemode_delay jiffies | |
8578 | */ | |
8579 | mod_timer(&mddev->safemode_timer, | |
8580 | roundup(jiffies, mddev->safemode_delay) + | |
8581 | mddev->safemode_delay); | |
1da177e4 | 8582 | } |
4ad23a97 | 8583 | |
6c144d31 | 8584 | EXPORT_SYMBOL(md_write_end); |
1da177e4 | 8585 | |
cf78408f XN |
8586 | /* This is used by raid0 and raid10 */ |
8587 | void md_submit_discard_bio(struct mddev *mddev, struct md_rdev *rdev, | |
8588 | struct bio *bio, sector_t start, sector_t size) | |
8589 | { | |
8590 | struct bio *discard_bio = NULL; | |
8591 | ||
44abff2c | 8592 | if (__blkdev_issue_discard(rdev->bdev, start, size, GFP_NOIO, |
cf78408f XN |
8593 | &discard_bio) || !discard_bio) |
8594 | return; | |
8595 | ||
8596 | bio_chain(discard_bio, bio); | |
8597 | bio_clone_blkg_association(discard_bio, bio); | |
8598 | if (mddev->gendisk) | |
8599 | trace_block_bio_remap(discard_bio, | |
8600 | disk_devt(mddev->gendisk), | |
8601 | bio->bi_iter.bi_sector); | |
8602 | submit_bio_noacct(discard_bio); | |
8603 | } | |
8604 | EXPORT_SYMBOL_GPL(md_submit_discard_bio); | |
8605 | ||
0c031fd3 XN |
8606 | int acct_bioset_init(struct mddev *mddev) |
8607 | { | |
8608 | int err = 0; | |
8609 | ||
8610 | if (!bioset_initialized(&mddev->io_acct_set)) | |
8611 | err = bioset_init(&mddev->io_acct_set, BIO_POOL_SIZE, | |
8612 | offsetof(struct md_io_acct, bio_clone), 0); | |
8613 | return err; | |
8614 | } | |
8615 | EXPORT_SYMBOL_GPL(acct_bioset_init); | |
8616 | ||
8617 | void acct_bioset_exit(struct mddev *mddev) | |
8618 | { | |
8619 | bioset_exit(&mddev->io_acct_set); | |
8620 | } | |
8621 | EXPORT_SYMBOL_GPL(acct_bioset_exit); | |
8622 | ||
10764815 GJ |
8623 | static void md_end_io_acct(struct bio *bio) |
8624 | { | |
8625 | struct md_io_acct *md_io_acct = bio->bi_private; | |
8626 | struct bio *orig_bio = md_io_acct->orig_bio; | |
8627 | ||
8628 | orig_bio->bi_status = bio->bi_status; | |
8629 | ||
8630 | bio_end_io_acct(orig_bio, md_io_acct->start_time); | |
8631 | bio_put(bio); | |
8632 | bio_endio(orig_bio); | |
8633 | } | |
8634 | ||
daee2024 GJ |
8635 | /* |
8636 | * Used by personalities that don't already clone the bio and thus can't | |
8637 | * easily add the timestamp to their extended bio structure. | |
8638 | */ | |
10764815 GJ |
8639 | void md_account_bio(struct mddev *mddev, struct bio **bio) |
8640 | { | |
abfc426d | 8641 | struct block_device *bdev = (*bio)->bi_bdev; |
10764815 GJ |
8642 | struct md_io_acct *md_io_acct; |
8643 | struct bio *clone; | |
8644 | ||
abfc426d | 8645 | if (!blk_queue_io_stat(bdev->bd_disk->queue)) |
10764815 GJ |
8646 | return; |
8647 | ||
abfc426d | 8648 | clone = bio_alloc_clone(bdev, *bio, GFP_NOIO, &mddev->io_acct_set); |
10764815 GJ |
8649 | md_io_acct = container_of(clone, struct md_io_acct, bio_clone); |
8650 | md_io_acct->orig_bio = *bio; | |
8651 | md_io_acct->start_time = bio_start_io_acct(*bio); | |
8652 | ||
8653 | clone->bi_end_io = md_end_io_acct; | |
8654 | clone->bi_private = md_io_acct; | |
8655 | *bio = clone; | |
8656 | } | |
8657 | EXPORT_SYMBOL_GPL(md_account_bio); | |
8658 | ||
2a2275d6 N |
8659 | /* md_allow_write(mddev) |
8660 | * Calling this ensures that the array is marked 'active' so that writes | |
8661 | * may proceed without blocking. It is important to call this before | |
8662 | * attempting a GFP_KERNEL allocation while holding the mddev lock. | |
8663 | * Must be called with mddev_lock held. | |
8664 | */ | |
2214c260 | 8665 | void md_allow_write(struct mddev *mddev) |
2a2275d6 N |
8666 | { |
8667 | if (!mddev->pers) | |
2214c260 | 8668 | return; |
2a2275d6 | 8669 | if (mddev->ro) |
2214c260 | 8670 | return; |
1a0fd497 | 8671 | if (!mddev->pers->sync_request) |
2214c260 | 8672 | return; |
2a2275d6 | 8673 | |
85572d7c | 8674 | spin_lock(&mddev->lock); |
2a2275d6 N |
8675 | if (mddev->in_sync) { |
8676 | mddev->in_sync = 0; | |
2953079c SL |
8677 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8678 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
2a2275d6 N |
8679 | if (mddev->safemode_delay && |
8680 | mddev->safemode == 0) | |
8681 | mddev->safemode = 1; | |
85572d7c | 8682 | spin_unlock(&mddev->lock); |
2a2275d6 | 8683 | md_update_sb(mddev, 0); |
00bcb4ac | 8684 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
2214c260 AP |
8685 | /* wait for the dirty state to be recorded in the metadata */ |
8686 | wait_event(mddev->sb_wait, | |
2214c260 | 8687 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
2a2275d6 | 8688 | } else |
85572d7c | 8689 | spin_unlock(&mddev->lock); |
2a2275d6 N |
8690 | } |
8691 | EXPORT_SYMBOL_GPL(md_allow_write); | |
8692 | ||
1da177e4 LT |
8693 | #define SYNC_MARKS 10 |
8694 | #define SYNC_MARK_STEP (3*HZ) | |
54f89341 | 8695 | #define UPDATE_FREQUENCY (5*60*HZ) |
4ed8731d | 8696 | void md_do_sync(struct md_thread *thread) |
1da177e4 | 8697 | { |
4ed8731d | 8698 | struct mddev *mddev = thread->mddev; |
fd01b88c | 8699 | struct mddev *mddev2; |
e5b521ee | 8700 | unsigned int currspeed = 0, window; |
ac7e50a3 | 8701 | sector_t max_sectors,j, io_sectors, recovery_done; |
1da177e4 | 8702 | unsigned long mark[SYNC_MARKS]; |
54f89341 | 8703 | unsigned long update_time; |
1da177e4 LT |
8704 | sector_t mark_cnt[SYNC_MARKS]; |
8705 | int last_mark,m; | |
1da177e4 | 8706 | sector_t last_check; |
57afd89f | 8707 | int skipped = 0; |
3cb03002 | 8708 | struct md_rdev *rdev; |
c4a39551 | 8709 | char *desc, *action = NULL; |
7c2c57c9 | 8710 | struct blk_plug plug; |
41a9a0dc | 8711 | int ret; |
1da177e4 LT |
8712 | |
8713 | /* just incase thread restarts... */ | |
d5d885fd SL |
8714 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
8715 | test_bit(MD_RECOVERY_WAIT, &mddev->recovery)) | |
1da177e4 | 8716 | return; |
3991b31e N |
8717 | if (mddev->ro) {/* never try to sync a read-only array */ |
8718 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
5fd6c1dc | 8719 | return; |
3991b31e | 8720 | } |
1da177e4 | 8721 | |
41a9a0dc GJ |
8722 | if (mddev_is_clustered(mddev)) { |
8723 | ret = md_cluster_ops->resync_start(mddev); | |
8724 | if (ret) | |
8725 | goto skip; | |
8726 | ||
bb8bf15b | 8727 | set_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags); |
41a9a0dc GJ |
8728 | if (!(test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8729 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) || | |
8730 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) | |
8731 | && ((unsigned long long)mddev->curr_resync_completed | |
8732 | < (unsigned long long)mddev->resync_max_sectors)) | |
8733 | goto skip; | |
8734 | } | |
8735 | ||
61df9d91 | 8736 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
c4a39551 | 8737 | if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) { |
61df9d91 | 8738 | desc = "data-check"; |
c4a39551 JB |
8739 | action = "check"; |
8740 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
61df9d91 | 8741 | desc = "requested-resync"; |
c4a39551 JB |
8742 | action = "repair"; |
8743 | } else | |
61df9d91 N |
8744 | desc = "resync"; |
8745 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
8746 | desc = "reshape"; | |
8747 | else | |
8748 | desc = "recovery"; | |
8749 | ||
c4a39551 JB |
8750 | mddev->last_sync_action = action ?: desc; |
8751 | ||
eac58d08 | 8752 | /* |
1da177e4 LT |
8753 | * Before starting a resync we must have set curr_resync to |
8754 | * 2, and then checked that every "conflicting" array has curr_resync | |
8755 | * less than ours. When we find one that is the same or higher | |
8756 | * we wait on resync_wait. To avoid deadlock, we reduce curr_resync | |
8757 | * to 1 if we choose to yield (based arbitrarily on address of mddev structure). | |
8758 | * This will mean we have to start checking from the beginning again. | |
8759 | * | |
8760 | */ | |
8761 | ||
8762 | do { | |
c622ca54 | 8763 | int mddev2_minor = -1; |
eac58d08 | 8764 | mddev->curr_resync = MD_RESYNC_DELAYED; |
1da177e4 LT |
8765 | |
8766 | try_again: | |
404e4b43 | 8767 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
1da177e4 | 8768 | goto skip; |
b0e706a1 CH |
8769 | spin_lock(&all_mddevs_lock); |
8770 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) { | |
12a6caf2 CH |
8771 | if (test_bit(MD_DELETED, &mddev2->flags)) |
8772 | continue; | |
1da177e4 LT |
8773 | if (mddev2 == mddev) |
8774 | continue; | |
90b08710 BS |
8775 | if (!mddev->parallel_resync |
8776 | && mddev2->curr_resync | |
8777 | && match_mddev_units(mddev, mddev2)) { | |
1da177e4 | 8778 | DEFINE_WAIT(wq); |
eac58d08 LG |
8779 | if (mddev < mddev2 && |
8780 | mddev->curr_resync == MD_RESYNC_DELAYED) { | |
1da177e4 | 8781 | /* arbitrarily yield */ |
eac58d08 | 8782 | mddev->curr_resync = MD_RESYNC_YIELDED; |
1da177e4 LT |
8783 | wake_up(&resync_wait); |
8784 | } | |
eac58d08 LG |
8785 | if (mddev > mddev2 && |
8786 | mddev->curr_resync == MD_RESYNC_YIELDED) | |
1da177e4 LT |
8787 | /* no need to wait here, we can wait the next |
8788 | * time 'round when curr_resync == 2 | |
8789 | */ | |
8790 | continue; | |
9744197c N |
8791 | /* We need to wait 'interruptible' so as not to |
8792 | * contribute to the load average, and not to | |
8793 | * be caught by 'softlockup' | |
8794 | */ | |
8795 | prepare_to_wait(&resync_wait, &wq, TASK_INTERRUPTIBLE); | |
c91abf5a | 8796 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
8712e553 | 8797 | mddev2->curr_resync >= mddev->curr_resync) { |
c622ca54 AP |
8798 | if (mddev2_minor != mddev2->md_minor) { |
8799 | mddev2_minor = mddev2->md_minor; | |
9d48739e N |
8800 | pr_info("md: delaying %s of %s until %s has finished (they share one or more physical units)\n", |
8801 | desc, mdname(mddev), | |
8802 | mdname(mddev2)); | |
c622ca54 | 8803 | } |
b0e706a1 CH |
8804 | spin_unlock(&all_mddevs_lock); |
8805 | ||
9744197c N |
8806 | if (signal_pending(current)) |
8807 | flush_signals(current); | |
1da177e4 LT |
8808 | schedule(); |
8809 | finish_wait(&resync_wait, &wq); | |
8810 | goto try_again; | |
8811 | } | |
8812 | finish_wait(&resync_wait, &wq); | |
8813 | } | |
8814 | } | |
b0e706a1 | 8815 | spin_unlock(&all_mddevs_lock); |
eac58d08 | 8816 | } while (mddev->curr_resync < MD_RESYNC_DELAYED); |
1da177e4 | 8817 | |
5fd6c1dc | 8818 | j = 0; |
9d88883e | 8819 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
1da177e4 | 8820 | /* resync follows the size requested by the personality, |
57afd89f | 8821 | * which defaults to physical size, but can be virtual size |
1da177e4 LT |
8822 | */ |
8823 | max_sectors = mddev->resync_max_sectors; | |
7f7583d4 | 8824 | atomic64_set(&mddev->resync_mismatches, 0); |
5fd6c1dc | 8825 | /* we don't use the checkpoint if there's a bitmap */ |
5e96ee65 NB |
8826 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) |
8827 | j = mddev->resync_min; | |
8828 | else if (!mddev->bitmap) | |
5fd6c1dc | 8829 | j = mddev->recovery_cp; |
5e96ee65 | 8830 | |
cb9ee154 | 8831 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) { |
c804cdec | 8832 | max_sectors = mddev->resync_max_sectors; |
cb9ee154 GJ |
8833 | /* |
8834 | * If the original node aborts reshaping then we continue the | |
8835 | * reshaping, so set j again to avoid restart reshape from the | |
8836 | * first beginning | |
8837 | */ | |
8838 | if (mddev_is_clustered(mddev) && | |
8839 | mddev->reshape_position != MaxSector) | |
8840 | j = mddev->reshape_position; | |
8841 | } else { | |
1da177e4 | 8842 | /* recovery follows the physical size of devices */ |
58c0fed4 | 8843 | max_sectors = mddev->dev_sectors; |
5fd6c1dc | 8844 | j = MaxSector; |
4e59ca7d | 8845 | rcu_read_lock(); |
dafb20fa | 8846 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 8847 | if (rdev->raid_disk >= 0 && |
f2076e7d | 8848 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
8849 | !test_bit(Faulty, &rdev->flags) && |
8850 | !test_bit(In_sync, &rdev->flags) && | |
8851 | rdev->recovery_offset < j) | |
8852 | j = rdev->recovery_offset; | |
4e59ca7d | 8853 | rcu_read_unlock(); |
133d4527 N |
8854 | |
8855 | /* If there is a bitmap, we need to make sure all | |
8856 | * writes that started before we added a spare | |
8857 | * complete before we start doing a recovery. | |
8858 | * Otherwise the write might complete and (via | |
8859 | * bitmap_endwrite) set a bit in the bitmap after the | |
8860 | * recovery has checked that bit and skipped that | |
8861 | * region. | |
8862 | */ | |
8863 | if (mddev->bitmap) { | |
8864 | mddev->pers->quiesce(mddev, 1); | |
8865 | mddev->pers->quiesce(mddev, 0); | |
8866 | } | |
5fd6c1dc | 8867 | } |
1da177e4 | 8868 | |
9d48739e N |
8869 | pr_info("md: %s of RAID array %s\n", desc, mdname(mddev)); |
8870 | pr_debug("md: minimum _guaranteed_ speed: %d KB/sec/disk.\n", speed_min(mddev)); | |
8871 | pr_debug("md: using maximum available idle IO bandwidth (but not more than %d KB/sec) for %s.\n", | |
8872 | speed_max(mddev), desc); | |
1da177e4 | 8873 | |
eea1bf38 | 8874 | is_mddev_idle(mddev, 1); /* this initializes IO event counters */ |
5fd6c1dc | 8875 | |
57afd89f | 8876 | io_sectors = 0; |
1da177e4 LT |
8877 | for (m = 0; m < SYNC_MARKS; m++) { |
8878 | mark[m] = jiffies; | |
57afd89f | 8879 | mark_cnt[m] = io_sectors; |
1da177e4 LT |
8880 | } |
8881 | last_mark = 0; | |
8882 | mddev->resync_mark = mark[last_mark]; | |
8883 | mddev->resync_mark_cnt = mark_cnt[last_mark]; | |
8884 | ||
8885 | /* | |
8886 | * Tune reconstruction: | |
8887 | */ | |
e5b521ee | 8888 | window = 32 * (PAGE_SIZE / 512); |
9d48739e N |
8889 | pr_debug("md: using %dk window, over a total of %lluk.\n", |
8890 | window/2, (unsigned long long)max_sectors/2); | |
1da177e4 LT |
8891 | |
8892 | atomic_set(&mddev->recovery_active, 0); | |
1da177e4 LT |
8893 | last_check = 0; |
8894 | ||
8895 | if (j>2) { | |
9d48739e N |
8896 | pr_debug("md: resuming %s of %s from checkpoint.\n", |
8897 | desc, mdname(mddev)); | |
1da177e4 | 8898 | mddev->curr_resync = j; |
72f36d59 | 8899 | } else |
eac58d08 | 8900 | mddev->curr_resync = MD_RESYNC_ACTIVE; /* no longer delayed */ |
75d3da43 | 8901 | mddev->curr_resync_completed = j; |
e1a86dbb | 8902 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
54679486 | 8903 | md_new_event(); |
54f89341 | 8904 | update_time = jiffies; |
1da177e4 | 8905 | |
7c2c57c9 | 8906 | blk_start_plug(&plug); |
1da177e4 | 8907 | while (j < max_sectors) { |
57afd89f | 8908 | sector_t sectors; |
1da177e4 | 8909 | |
57afd89f | 8910 | skipped = 0; |
97e4f42d | 8911 | |
7a91ee1f N |
8912 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8913 | ((mddev->curr_resync > mddev->curr_resync_completed && | |
8914 | (mddev->curr_resync - mddev->curr_resync_completed) | |
8915 | > (max_sectors >> 4)) || | |
54f89341 | 8916 | time_after_eq(jiffies, update_time + UPDATE_FREQUENCY) || |
7a91ee1f | 8917 | (j - mddev->curr_resync_completed)*2 |
c5e19d90 N |
8918 | >= mddev->resync_max - mddev->curr_resync_completed || |
8919 | mddev->curr_resync_completed > mddev->resync_max | |
7a91ee1f | 8920 | )) { |
97e4f42d | 8921 | /* time to update curr_resync_completed */ |
97e4f42d N |
8922 | wait_event(mddev->recovery_wait, |
8923 | atomic_read(&mddev->recovery_active) == 0); | |
75d3da43 | 8924 | mddev->curr_resync_completed = j; |
35d78c66 | 8925 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && |
8926 | j > mddev->recovery_cp) | |
8927 | mddev->recovery_cp = j; | |
54f89341 | 8928 | update_time = jiffies; |
2953079c | 8929 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
e1a86dbb | 8930 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
97e4f42d | 8931 | } |
acb180b0 | 8932 | |
c91abf5a N |
8933 | while (j >= mddev->resync_max && |
8934 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
e62e58a5 N |
8935 | /* As this condition is controlled by user-space, |
8936 | * we can block indefinitely, so use '_interruptible' | |
8937 | * to avoid triggering warnings. | |
8938 | */ | |
8939 | flush_signals(current); /* just in case */ | |
8940 | wait_event_interruptible(mddev->recovery_wait, | |
8941 | mddev->resync_max > j | |
c91abf5a N |
8942 | || test_bit(MD_RECOVERY_INTR, |
8943 | &mddev->recovery)); | |
e62e58a5 | 8944 | } |
acb180b0 | 8945 | |
c91abf5a N |
8946 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8947 | break; | |
acb180b0 | 8948 | |
09314799 | 8949 | sectors = mddev->pers->sync_request(mddev, j, &skipped); |
57afd89f | 8950 | if (sectors == 0) { |
dfc70645 | 8951 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
c91abf5a | 8952 | break; |
1da177e4 | 8953 | } |
57afd89f N |
8954 | |
8955 | if (!skipped) { /* actual IO requested */ | |
8956 | io_sectors += sectors; | |
8957 | atomic_add(sectors, &mddev->recovery_active); | |
8958 | } | |
8959 | ||
e875ecea N |
8960 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8961 | break; | |
8962 | ||
1da177e4 | 8963 | j += sectors; |
5ed1df2e N |
8964 | if (j > max_sectors) |
8965 | /* when skipping, extra large numbers can be returned. */ | |
8966 | j = max_sectors; | |
72f36d59 N |
8967 | if (j > 2) |
8968 | mddev->curr_resync = j; | |
ff4e8d9a | 8969 | mddev->curr_mark_cnt = io_sectors; |
d7603b7e | 8970 | if (last_check == 0) |
e875ecea | 8971 | /* this is the earliest that rebuild will be |
d7603b7e N |
8972 | * visible in /proc/mdstat |
8973 | */ | |
54679486 | 8974 | md_new_event(); |
57afd89f N |
8975 | |
8976 | if (last_check + window > io_sectors || j == max_sectors) | |
1da177e4 LT |
8977 | continue; |
8978 | ||
57afd89f | 8979 | last_check = io_sectors; |
1da177e4 LT |
8980 | repeat: |
8981 | if (time_after_eq(jiffies, mark[last_mark] + SYNC_MARK_STEP )) { | |
8982 | /* step marks */ | |
8983 | int next = (last_mark+1) % SYNC_MARKS; | |
8984 | ||
8985 | mddev->resync_mark = mark[next]; | |
8986 | mddev->resync_mark_cnt = mark_cnt[next]; | |
8987 | mark[next] = jiffies; | |
57afd89f | 8988 | mark_cnt[next] = io_sectors - atomic_read(&mddev->recovery_active); |
1da177e4 LT |
8989 | last_mark = next; |
8990 | } | |
8991 | ||
c91abf5a N |
8992 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8993 | break; | |
1da177e4 LT |
8994 | |
8995 | /* | |
8996 | * this loop exits only if either when we are slower than | |
8997 | * the 'hard' speed limit, or the system was IO-idle for | |
8998 | * a jiffy. | |
8999 | * the system might be non-idle CPU-wise, but we only care | |
9000 | * about not overloading the IO subsystem. (things like an | |
9001 | * e2fsck being done on the RAID array should execute fast) | |
9002 | */ | |
1da177e4 LT |
9003 | cond_resched(); |
9004 | ||
ac7e50a3 XN |
9005 | recovery_done = io_sectors - atomic_read(&mddev->recovery_active); |
9006 | currspeed = ((unsigned long)(recovery_done - mddev->resync_mark_cnt))/2 | |
57afd89f | 9007 | /((jiffies-mddev->resync_mark)/HZ +1) +1; |
1da177e4 | 9008 | |
88202a0c | 9009 | if (currspeed > speed_min(mddev)) { |
ac8fa419 | 9010 | if (currspeed > speed_max(mddev)) { |
c0e48521 | 9011 | msleep(500); |
1da177e4 LT |
9012 | goto repeat; |
9013 | } | |
ac8fa419 N |
9014 | if (!is_mddev_idle(mddev, 0)) { |
9015 | /* | |
9016 | * Give other IO more of a chance. | |
9017 | * The faster the devices, the less we wait. | |
9018 | */ | |
9019 | wait_event(mddev->recovery_wait, | |
9020 | !atomic_read(&mddev->recovery_active)); | |
9021 | } | |
1da177e4 LT |
9022 | } |
9023 | } | |
9d48739e N |
9024 | pr_info("md: %s: %s %s.\n",mdname(mddev), desc, |
9025 | test_bit(MD_RECOVERY_INTR, &mddev->recovery) | |
9026 | ? "interrupted" : "done"); | |
1da177e4 LT |
9027 | /* |
9028 | * this also signals 'finished resyncing' to md_stop | |
9029 | */ | |
7c2c57c9 | 9030 | blk_finish_plug(&plug); |
1da177e4 LT |
9031 | wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active)); |
9032 | ||
5ed1df2e N |
9033 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9034 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
eac58d08 | 9035 | mddev->curr_resync >= MD_RESYNC_ACTIVE) { |
5ed1df2e | 9036 | mddev->curr_resync_completed = mddev->curr_resync; |
e1a86dbb | 9037 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
5ed1df2e | 9038 | } |
09314799 | 9039 | mddev->pers->sync_request(mddev, max_sectors, &skipped); |
1da177e4 | 9040 | |
dfc70645 | 9041 | if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) && |
eac58d08 | 9042 | mddev->curr_resync >= MD_RESYNC_ACTIVE) { |
5fd6c1dc N |
9043 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
9044 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
9045 | if (mddev->curr_resync >= mddev->recovery_cp) { | |
9d48739e N |
9046 | pr_debug("md: checkpointing %s of %s.\n", |
9047 | desc, mdname(mddev)); | |
0a19caab | 9048 | if (test_bit(MD_RECOVERY_ERROR, |
9049 | &mddev->recovery)) | |
9050 | mddev->recovery_cp = | |
9051 | mddev->curr_resync_completed; | |
9052 | else | |
9053 | mddev->recovery_cp = | |
9054 | mddev->curr_resync; | |
5fd6c1dc N |
9055 | } |
9056 | } else | |
9057 | mddev->recovery_cp = MaxSector; | |
9058 | } else { | |
9059 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) | |
9060 | mddev->curr_resync = MaxSector; | |
db0505d3 N |
9061 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9062 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) { | |
9063 | rcu_read_lock(); | |
9064 | rdev_for_each_rcu(rdev, mddev) | |
9065 | if (rdev->raid_disk >= 0 && | |
9066 | mddev->delta_disks >= 0 && | |
9067 | !test_bit(Journal, &rdev->flags) && | |
9068 | !test_bit(Faulty, &rdev->flags) && | |
9069 | !test_bit(In_sync, &rdev->flags) && | |
9070 | rdev->recovery_offset < mddev->curr_resync) | |
9071 | rdev->recovery_offset = mddev->curr_resync; | |
9072 | rcu_read_unlock(); | |
9073 | } | |
5fd6c1dc | 9074 | } |
1da177e4 | 9075 | } |
db91ff55 | 9076 | skip: |
bb8bf15b GJ |
9077 | /* set CHANGE_PENDING here since maybe another update is needed, |
9078 | * so other nodes are informed. It should be harmless for normal | |
9079 | * raid */ | |
2953079c SL |
9080 | set_mask_bits(&mddev->sb_flags, 0, |
9081 | BIT(MD_SB_CHANGE_PENDING) | BIT(MD_SB_CHANGE_DEVS)); | |
c186b128 | 9082 | |
8876391e BC |
9083 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9084 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
9085 | mddev->delta_disks > 0 && | |
9086 | mddev->pers->finish_reshape && | |
9087 | mddev->pers->size && | |
9088 | mddev->queue) { | |
9089 | mddev_lock_nointr(mddev); | |
9090 | md_set_array_sectors(mddev, mddev->pers->size(mddev, 0, 0)); | |
9091 | mddev_unlock(mddev); | |
2c247c51 CH |
9092 | if (!mddev_is_clustered(mddev)) |
9093 | set_capacity_and_notify(mddev->gendisk, | |
9094 | mddev->array_sectors); | |
8876391e BC |
9095 | } |
9096 | ||
23da422b | 9097 | spin_lock(&mddev->lock); |
c07b70ad N |
9098 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { |
9099 | /* We completed so min/max setting can be forgotten if used. */ | |
9100 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
9101 | mddev->resync_min = 0; | |
9102 | mddev->resync_max = MaxSector; | |
9103 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
9104 | mddev->resync_min = mddev->curr_resync_completed; | |
f7851be7 | 9105 | set_bit(MD_RECOVERY_DONE, &mddev->recovery); |
eac58d08 | 9106 | mddev->curr_resync = MD_RESYNC_NONE; |
23da422b N |
9107 | spin_unlock(&mddev->lock); |
9108 | ||
1da177e4 | 9109 | wake_up(&resync_wait); |
1da177e4 | 9110 | md_wakeup_thread(mddev->thread); |
c6207277 | 9111 | return; |
1da177e4 | 9112 | } |
29269553 | 9113 | EXPORT_SYMBOL_GPL(md_do_sync); |
1da177e4 | 9114 | |
746d3207 N |
9115 | static int remove_and_add_spares(struct mddev *mddev, |
9116 | struct md_rdev *this) | |
b4c4c7b8 | 9117 | { |
3cb03002 | 9118 | struct md_rdev *rdev; |
b4c4c7b8 | 9119 | int spares = 0; |
f2a371c5 | 9120 | int removed = 0; |
d787be40 | 9121 | bool remove_some = false; |
b4c4c7b8 | 9122 | |
39772f0a N |
9123 | if (this && test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
9124 | /* Mustn't remove devices when resync thread is running */ | |
9125 | return 0; | |
9126 | ||
d787be40 N |
9127 | rdev_for_each(rdev, mddev) { |
9128 | if ((this == NULL || rdev == this) && | |
9129 | rdev->raid_disk >= 0 && | |
9130 | !test_bit(Blocked, &rdev->flags) && | |
9131 | test_bit(Faulty, &rdev->flags) && | |
9132 | atomic_read(&rdev->nr_pending)==0) { | |
9133 | /* Faulty non-Blocked devices with nr_pending == 0 | |
9134 | * never get nr_pending incremented, | |
9135 | * never get Faulty cleared, and never get Blocked set. | |
9136 | * So we can synchronize_rcu now rather than once per device | |
9137 | */ | |
9138 | remove_some = true; | |
9139 | set_bit(RemoveSynchronized, &rdev->flags); | |
9140 | } | |
9141 | } | |
9142 | ||
9143 | if (remove_some) | |
9144 | synchronize_rcu(); | |
9145 | rdev_for_each(rdev, mddev) { | |
746d3207 N |
9146 | if ((this == NULL || rdev == this) && |
9147 | rdev->raid_disk >= 0 && | |
6bfe0b49 | 9148 | !test_bit(Blocked, &rdev->flags) && |
d787be40 | 9149 | ((test_bit(RemoveSynchronized, &rdev->flags) || |
f2076e7d SL |
9150 | (!test_bit(In_sync, &rdev->flags) && |
9151 | !test_bit(Journal, &rdev->flags))) && | |
d787be40 | 9152 | atomic_read(&rdev->nr_pending)==0)) { |
b4c4c7b8 | 9153 | if (mddev->pers->hot_remove_disk( |
b8321b68 | 9154 | mddev, rdev) == 0) { |
36fad858 | 9155 | sysfs_unlink_rdev(mddev, rdev); |
011abdc9 | 9156 | rdev->saved_raid_disk = rdev->raid_disk; |
b4c4c7b8 | 9157 | rdev->raid_disk = -1; |
f2a371c5 | 9158 | removed++; |
b4c4c7b8 N |
9159 | } |
9160 | } | |
d787be40 N |
9161 | if (remove_some && test_bit(RemoveSynchronized, &rdev->flags)) |
9162 | clear_bit(RemoveSynchronized, &rdev->flags); | |
9163 | } | |
9164 | ||
90584fc9 | 9165 | if (removed && mddev->kobj.sd) |
e1a86dbb | 9166 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
b4c4c7b8 | 9167 | |
2910ff17 | 9168 | if (this && removed) |
746d3207 N |
9169 | goto no_add; |
9170 | ||
dafb20fa | 9171 | rdev_for_each(rdev, mddev) { |
2910ff17 GR |
9172 | if (this && this != rdev) |
9173 | continue; | |
dbb64f86 GR |
9174 | if (test_bit(Candidate, &rdev->flags)) |
9175 | continue; | |
7bfec5f3 N |
9176 | if (rdev->raid_disk >= 0 && |
9177 | !test_bit(In_sync, &rdev->flags) && | |
f2076e7d | 9178 | !test_bit(Journal, &rdev->flags) && |
7bfec5f3 N |
9179 | !test_bit(Faulty, &rdev->flags)) |
9180 | spares++; | |
7ceb17e8 N |
9181 | if (rdev->raid_disk >= 0) |
9182 | continue; | |
9183 | if (test_bit(Faulty, &rdev->flags)) | |
9184 | continue; | |
f6b6ec5c SL |
9185 | if (!test_bit(Journal, &rdev->flags)) { |
9186 | if (mddev->ro && | |
9187 | ! (rdev->saved_raid_disk >= 0 && | |
9188 | !test_bit(Bitmap_sync, &rdev->flags))) | |
9189 | continue; | |
7ceb17e8 | 9190 | |
f6b6ec5c SL |
9191 | rdev->recovery_offset = 0; |
9192 | } | |
3f79cc22 | 9193 | if (mddev->pers->hot_add_disk(mddev, rdev) == 0) { |
5e3b8a8d DLM |
9194 | /* failure here is OK */ |
9195 | sysfs_link_rdev(mddev, rdev); | |
f6b6ec5c SL |
9196 | if (!test_bit(Journal, &rdev->flags)) |
9197 | spares++; | |
54679486 | 9198 | md_new_event(); |
2953079c | 9199 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
dfc70645 | 9200 | } |
b4c4c7b8 | 9201 | } |
746d3207 | 9202 | no_add: |
6dafab6b | 9203 | if (removed) |
2953079c | 9204 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
b4c4c7b8 N |
9205 | return spares; |
9206 | } | |
7ebc0be7 | 9207 | |
ac05f256 N |
9208 | static void md_start_sync(struct work_struct *ws) |
9209 | { | |
9210 | struct mddev *mddev = container_of(ws, struct mddev, del_work); | |
c186b128 | 9211 | |
ac05f256 N |
9212 | mddev->sync_thread = md_register_thread(md_do_sync, |
9213 | mddev, | |
9214 | "resync"); | |
9215 | if (!mddev->sync_thread) { | |
9d48739e N |
9216 | pr_warn("%s: could not start resync thread...\n", |
9217 | mdname(mddev)); | |
ac05f256 N |
9218 | /* leave the spares where they are, it shouldn't hurt */ |
9219 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
9220 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9221 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9222 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
9223 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 9224 | wake_up(&resync_wait); |
ac05f256 N |
9225 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
9226 | &mddev->recovery)) | |
9227 | if (mddev->sysfs_action) | |
9228 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9229 | } else | |
9230 | md_wakeup_thread(mddev->sync_thread); | |
9231 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
54679486 | 9232 | md_new_event(); |
ac05f256 N |
9233 | } |
9234 | ||
1da177e4 LT |
9235 | /* |
9236 | * This routine is regularly called by all per-raid-array threads to | |
9237 | * deal with generic issues like resync and super-block update. | |
9238 | * Raid personalities that don't have a thread (linear/raid0) do not | |
9239 | * need this as they never do any recovery or update the superblock. | |
9240 | * | |
9241 | * It does not do any resync itself, but rather "forks" off other threads | |
9242 | * to do that as needed. | |
9243 | * When it is determined that resync is needed, we set MD_RECOVERY_RUNNING in | |
9244 | * "->recovery" and create a thread at ->sync_thread. | |
dfc70645 | 9245 | * When the thread finishes it sets MD_RECOVERY_DONE |
1da177e4 LT |
9246 | * and wakeups up this thread which will reap the thread and finish up. |
9247 | * This thread also removes any faulty devices (with nr_pending == 0). | |
9248 | * | |
9249 | * The overall approach is: | |
9250 | * 1/ if the superblock needs updating, update it. | |
9251 | * 2/ If a recovery thread is running, don't do anything else. | |
9252 | * 3/ If recovery has finished, clean up, possibly marking spares active. | |
9253 | * 4/ If there are any faulty devices, remove them. | |
9254 | * 5/ If array is degraded, try to add spares devices | |
9255 | * 6/ If array has spares or is not in-sync, start a resync thread. | |
9256 | */ | |
fd01b88c | 9257 | void md_check_recovery(struct mddev *mddev) |
1da177e4 | 9258 | { |
059421e0 N |
9259 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags) && mddev->sb_flags) { |
9260 | /* Write superblock - thread that called mddev_suspend() | |
9261 | * holds reconfig_mutex for us. | |
9262 | */ | |
9263 | set_bit(MD_UPDATING_SB, &mddev->flags); | |
9264 | smp_mb__after_atomic(); | |
9265 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags)) | |
9266 | md_update_sb(mddev, 0); | |
9267 | clear_bit_unlock(MD_UPDATING_SB, &mddev->flags); | |
9268 | wake_up(&mddev->sb_wait); | |
9269 | } | |
9270 | ||
68866e42 JB |
9271 | if (mddev->suspended) |
9272 | return; | |
9273 | ||
5f40402d | 9274 | if (mddev->bitmap) |
e64e4018 | 9275 | md_bitmap_daemon_work(mddev); |
1da177e4 | 9276 | |
fca4d848 | 9277 | if (signal_pending(current)) { |
31a59e34 | 9278 | if (mddev->pers->sync_request && !mddev->external) { |
9d48739e N |
9279 | pr_debug("md: %s in immediate safe mode\n", |
9280 | mdname(mddev)); | |
fca4d848 N |
9281 | mddev->safemode = 2; |
9282 | } | |
9283 | flush_signals(current); | |
9284 | } | |
9285 | ||
c89a8eee N |
9286 | if (mddev->ro && !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) |
9287 | return; | |
1da177e4 | 9288 | if ( ! ( |
2953079c | 9289 | (mddev->sb_flags & ~ (1<<MD_SB_CHANGE_PENDING)) || |
1da177e4 | 9290 | test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
fca4d848 | 9291 | test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
31a59e34 | 9292 | (mddev->external == 0 && mddev->safemode == 1) || |
4ad23a97 | 9293 | (mddev->safemode == 2 |
fca4d848 | 9294 | && !mddev->in_sync && mddev->recovery_cp == MaxSector) |
1da177e4 LT |
9295 | )) |
9296 | return; | |
fca4d848 | 9297 | |
df5b89b3 | 9298 | if (mddev_trylock(mddev)) { |
b4c4c7b8 | 9299 | int spares = 0; |
480523fe | 9300 | bool try_set_sync = mddev->safemode != 0; |
fca4d848 | 9301 | |
afc1f55c | 9302 | if (!mddev->external && mddev->safemode == 1) |
33182d15 N |
9303 | mddev->safemode = 0; |
9304 | ||
c89a8eee | 9305 | if (mddev->ro) { |
ab16bfc7 NB |
9306 | struct md_rdev *rdev; |
9307 | if (!mddev->external && mddev->in_sync) | |
9308 | /* 'Blocked' flag not needed as failed devices | |
9309 | * will be recorded if array switched to read/write. | |
9310 | * Leaving it set will prevent the device | |
9311 | * from being removed. | |
9312 | */ | |
9313 | rdev_for_each(rdev, mddev) | |
9314 | clear_bit(Blocked, &rdev->flags); | |
7ceb17e8 N |
9315 | /* On a read-only array we can: |
9316 | * - remove failed devices | |
9317 | * - add already-in_sync devices if the array itself | |
9318 | * is in-sync. | |
9319 | * As we only add devices that are already in-sync, | |
9320 | * we can activate the spares immediately. | |
c89a8eee | 9321 | */ |
7ceb17e8 | 9322 | remove_and_add_spares(mddev, NULL); |
8313b8e5 N |
9323 | /* There is no thread, but we need to call |
9324 | * ->spare_active and clear saved_raid_disk | |
9325 | */ | |
2ac295a5 | 9326 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
9dfbdafd | 9327 | md_unregister_thread(&mddev->sync_thread); |
d0a18034 | 9328 | md_reap_sync_thread(mddev); |
a4a3d26d | 9329 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
8313b8e5 | 9330 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
2953079c | 9331 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
c89a8eee N |
9332 | goto unlock; |
9333 | } | |
9334 | ||
659b254f | 9335 | if (mddev_is_clustered(mddev)) { |
f7c7a2f9 | 9336 | struct md_rdev *rdev, *tmp; |
659b254f GJ |
9337 | /* kick the device if another node issued a |
9338 | * remove disk. | |
9339 | */ | |
f7c7a2f9 | 9340 | rdev_for_each_safe(rdev, tmp, mddev) { |
659b254f GJ |
9341 | if (test_and_clear_bit(ClusterRemove, &rdev->flags) && |
9342 | rdev->raid_disk < 0) | |
9343 | md_kick_rdev_from_array(rdev); | |
9344 | } | |
9345 | } | |
9346 | ||
480523fe | 9347 | if (try_set_sync && !mddev->external && !mddev->in_sync) { |
85572d7c | 9348 | spin_lock(&mddev->lock); |
6497709b | 9349 | set_in_sync(mddev); |
85572d7c | 9350 | spin_unlock(&mddev->lock); |
fca4d848 | 9351 | } |
fca4d848 | 9352 | |
2953079c | 9353 | if (mddev->sb_flags) |
850b2b42 | 9354 | md_update_sb(mddev, 0); |
06d91a5f | 9355 | |
1da177e4 LT |
9356 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
9357 | !test_bit(MD_RECOVERY_DONE, &mddev->recovery)) { | |
9358 | /* resync/recovery still happening */ | |
9359 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9360 | goto unlock; | |
9361 | } | |
9362 | if (mddev->sync_thread) { | |
9dfbdafd | 9363 | md_unregister_thread(&mddev->sync_thread); |
d0a18034 | 9364 | md_reap_sync_thread(mddev); |
1da177e4 LT |
9365 | goto unlock; |
9366 | } | |
72a23c21 NB |
9367 | /* Set RUNNING before clearing NEEDED to avoid |
9368 | * any transients in the value of "sync_action". | |
9369 | */ | |
72f36d59 | 9370 | mddev->curr_resync_completed = 0; |
23da422b | 9371 | spin_lock(&mddev->lock); |
72a23c21 | 9372 | set_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
23da422b | 9373 | spin_unlock(&mddev->lock); |
24dd469d N |
9374 | /* Clear some bits that don't mean anything, but |
9375 | * might be left set | |
9376 | */ | |
24dd469d N |
9377 | clear_bit(MD_RECOVERY_INTR, &mddev->recovery); |
9378 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); | |
1da177e4 | 9379 | |
ed209584 N |
9380 | if (!test_and_clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
9381 | test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) | |
ac05f256 | 9382 | goto not_running; |
1da177e4 LT |
9383 | /* no recovery is running. |
9384 | * remove any failed drives, then | |
9385 | * add spares if possible. | |
72f36d59 | 9386 | * Spares are also removed and re-added, to allow |
1da177e4 LT |
9387 | * the personality to fail the re-add. |
9388 | */ | |
1da177e4 | 9389 | |
b4c4c7b8 | 9390 | if (mddev->reshape_position != MaxSector) { |
50ac168a N |
9391 | if (mddev->pers->check_reshape == NULL || |
9392 | mddev->pers->check_reshape(mddev) != 0) | |
b4c4c7b8 | 9393 | /* Cannot proceed */ |
ac05f256 | 9394 | goto not_running; |
b4c4c7b8 | 9395 | set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); |
72a23c21 | 9396 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
746d3207 | 9397 | } else if ((spares = remove_and_add_spares(mddev, NULL))) { |
24dd469d N |
9398 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9399 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
56ac36d7 | 9400 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
72a23c21 | 9401 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9402 | } else if (mddev->recovery_cp < MaxSector) { |
9403 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
72a23c21 | 9404 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9405 | } else if (!test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) |
9406 | /* nothing to be done ... */ | |
ac05f256 | 9407 | goto not_running; |
24dd469d | 9408 | |
1da177e4 | 9409 | if (mddev->pers->sync_request) { |
ef99bf48 | 9410 | if (spares) { |
a654b9d8 N |
9411 | /* We are adding a device or devices to an array |
9412 | * which has the bitmap stored on all devices. | |
9413 | * So make sure all bitmap pages get written | |
9414 | */ | |
e64e4018 | 9415 | md_bitmap_write_all(mddev->bitmap); |
a654b9d8 | 9416 | } |
ac05f256 N |
9417 | INIT_WORK(&mddev->del_work, md_start_sync); |
9418 | queue_work(md_misc_wq, &mddev->del_work); | |
9419 | goto unlock; | |
1da177e4 | 9420 | } |
ac05f256 | 9421 | not_running: |
72a23c21 NB |
9422 | if (!mddev->sync_thread) { |
9423 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 9424 | wake_up(&resync_wait); |
72a23c21 NB |
9425 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
9426 | &mddev->recovery)) | |
0c3573f1 | 9427 | if (mddev->sysfs_action) |
00bcb4ac | 9428 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
72a23c21 | 9429 | } |
ac05f256 N |
9430 | unlock: |
9431 | wake_up(&mddev->sb_wait); | |
1da177e4 LT |
9432 | mddev_unlock(mddev); |
9433 | } | |
9434 | } | |
6c144d31 | 9435 | EXPORT_SYMBOL(md_check_recovery); |
1da177e4 | 9436 | |
d0a18034 | 9437 | void md_reap_sync_thread(struct mddev *mddev) |
a91d5ac0 JB |
9438 | { |
9439 | struct md_rdev *rdev; | |
aefb2e5f GJ |
9440 | sector_t old_dev_sectors = mddev->dev_sectors; |
9441 | bool is_reshaped = false; | |
a91d5ac0 | 9442 | |
9dfbdafd | 9443 | /* sync_thread should be unregistered, collect result */ |
a91d5ac0 | 9444 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
0d8ed0e9 GJ |
9445 | !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery) && |
9446 | mddev->degraded != mddev->raid_disks) { | |
a91d5ac0 JB |
9447 | /* success...*/ |
9448 | /* activate any spares */ | |
9449 | if (mddev->pers->spare_active(mddev)) { | |
e1a86dbb | 9450 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
2953079c | 9451 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a91d5ac0 JB |
9452 | } |
9453 | } | |
9454 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
aefb2e5f | 9455 | mddev->pers->finish_reshape) { |
a91d5ac0 | 9456 | mddev->pers->finish_reshape(mddev); |
aefb2e5f GJ |
9457 | if (mddev_is_clustered(mddev)) |
9458 | is_reshaped = true; | |
9459 | } | |
a91d5ac0 JB |
9460 | |
9461 | /* If array is no-longer degraded, then any saved_raid_disk | |
f466722c | 9462 | * information must be scrapped. |
a91d5ac0 | 9463 | */ |
f466722c N |
9464 | if (!mddev->degraded) |
9465 | rdev_for_each(rdev, mddev) | |
a91d5ac0 JB |
9466 | rdev->saved_raid_disk = -1; |
9467 | ||
9468 | md_update_sb(mddev, 1); | |
2953079c | 9469 | /* MD_SB_CHANGE_PENDING should be cleared by md_update_sb, so we can |
bb8bf15b GJ |
9470 | * call resync_finish here if MD_CLUSTER_RESYNC_LOCKED is set by |
9471 | * clustered raid */ | |
9472 | if (test_and_clear_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags)) | |
9473 | md_cluster_ops->resync_finish(mddev); | |
a91d5ac0 | 9474 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
ea358cd0 | 9475 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); |
a91d5ac0 JB |
9476 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9477 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9478 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9479 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
aefb2e5f GJ |
9480 | /* |
9481 | * We call md_cluster_ops->update_size here because sync_size could | |
9482 | * be changed by md_update_sb, and MD_RECOVERY_RESHAPE is cleared, | |
9483 | * so it is time to update size across cluster. | |
9484 | */ | |
9485 | if (mddev_is_clustered(mddev) && is_reshaped | |
9486 | && !test_bit(MD_CLOSING, &mddev->flags)) | |
9487 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
f851b60d | 9488 | wake_up(&resync_wait); |
a91d5ac0 JB |
9489 | /* flag recovery needed just to double check */ |
9490 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9973f0fa | 9491 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
a91d5ac0 | 9492 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
54679486 | 9493 | md_new_event(); |
a91d5ac0 JB |
9494 | if (mddev->event_work.func) |
9495 | queue_work(md_misc_wq, &mddev->event_work); | |
9496 | } | |
6c144d31 | 9497 | EXPORT_SYMBOL(md_reap_sync_thread); |
a91d5ac0 | 9498 | |
fd01b88c | 9499 | void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev) |
6bfe0b49 | 9500 | { |
00bcb4ac | 9501 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
6bfe0b49 | 9502 | wait_event_timeout(rdev->blocked_wait, |
de393cde N |
9503 | !test_bit(Blocked, &rdev->flags) && |
9504 | !test_bit(BlockedBadBlocks, &rdev->flags), | |
6bfe0b49 DW |
9505 | msecs_to_jiffies(5000)); |
9506 | rdev_dec_pending(rdev, mddev); | |
9507 | } | |
9508 | EXPORT_SYMBOL(md_wait_for_blocked_rdev); | |
9509 | ||
c6563a8c N |
9510 | void md_finish_reshape(struct mddev *mddev) |
9511 | { | |
9512 | /* called be personality module when reshape completes. */ | |
9513 | struct md_rdev *rdev; | |
9514 | ||
9515 | rdev_for_each(rdev, mddev) { | |
9516 | if (rdev->data_offset > rdev->new_data_offset) | |
9517 | rdev->sectors += rdev->data_offset - rdev->new_data_offset; | |
9518 | else | |
9519 | rdev->sectors -= rdev->new_data_offset - rdev->data_offset; | |
9520 | rdev->data_offset = rdev->new_data_offset; | |
9521 | } | |
9522 | } | |
9523 | EXPORT_SYMBOL(md_finish_reshape); | |
2230dfe4 | 9524 | |
fc974ee2 | 9525 | /* Bad block management */ |
2230dfe4 | 9526 | |
fc974ee2 | 9527 | /* Returns 1 on success, 0 on failure */ |
3cb03002 | 9528 | int rdev_set_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
c6563a8c | 9529 | int is_new) |
2230dfe4 | 9530 | { |
85ad1d13 | 9531 | struct mddev *mddev = rdev->mddev; |
c6563a8c N |
9532 | int rv; |
9533 | if (is_new) | |
9534 | s += rdev->new_data_offset; | |
9535 | else | |
9536 | s += rdev->data_offset; | |
fc974ee2 VV |
9537 | rv = badblocks_set(&rdev->badblocks, s, sectors, 0); |
9538 | if (rv == 0) { | |
2230dfe4 | 9539 | /* Make sure they get written out promptly */ |
35b785f7 | 9540 | if (test_bit(ExternalBbl, &rdev->flags)) |
e1a86dbb | 9541 | sysfs_notify_dirent_safe(rdev->sysfs_unack_badblocks); |
8bd2f0a0 | 9542 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
2953079c SL |
9543 | set_mask_bits(&mddev->sb_flags, 0, |
9544 | BIT(MD_SB_CHANGE_CLEAN) | BIT(MD_SB_CHANGE_PENDING)); | |
2230dfe4 | 9545 | md_wakeup_thread(rdev->mddev->thread); |
fc974ee2 VV |
9546 | return 1; |
9547 | } else | |
9548 | return 0; | |
2230dfe4 N |
9549 | } |
9550 | EXPORT_SYMBOL_GPL(rdev_set_badblocks); | |
9551 | ||
c6563a8c N |
9552 | int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
9553 | int is_new) | |
2230dfe4 | 9554 | { |
35b785f7 | 9555 | int rv; |
c6563a8c N |
9556 | if (is_new) |
9557 | s += rdev->new_data_offset; | |
9558 | else | |
9559 | s += rdev->data_offset; | |
35b785f7 TM |
9560 | rv = badblocks_clear(&rdev->badblocks, s, sectors); |
9561 | if ((rv == 0) && test_bit(ExternalBbl, &rdev->flags)) | |
e1a86dbb | 9562 | sysfs_notify_dirent_safe(rdev->sysfs_badblocks); |
35b785f7 | 9563 | return rv; |
2230dfe4 N |
9564 | } |
9565 | EXPORT_SYMBOL_GPL(rdev_clear_badblocks); | |
9566 | ||
75c96f85 AB |
9567 | static int md_notify_reboot(struct notifier_block *this, |
9568 | unsigned long code, void *x) | |
1da177e4 | 9569 | { |
f2651434 | 9570 | struct mddev *mddev, *n; |
2dba6a91 | 9571 | int need_delay = 0; |
1da177e4 | 9572 | |
f2651434 CH |
9573 | spin_lock(&all_mddevs_lock); |
9574 | list_for_each_entry_safe(mddev, n, &all_mddevs, all_mddevs) { | |
12a6caf2 CH |
9575 | if (!mddev_get(mddev)) |
9576 | continue; | |
f2651434 | 9577 | spin_unlock(&all_mddevs_lock); |
c744a65c | 9578 | if (mddev_trylock(mddev)) { |
30b8aa91 N |
9579 | if (mddev->pers) |
9580 | __md_stop_writes(mddev); | |
0f62fb22 N |
9581 | if (mddev->persistent) |
9582 | mddev->safemode = 2; | |
c744a65c | 9583 | mddev_unlock(mddev); |
2dba6a91 | 9584 | } |
c744a65c | 9585 | need_delay = 1; |
f2651434 CH |
9586 | mddev_put(mddev); |
9587 | spin_lock(&all_mddevs_lock); | |
1da177e4 | 9588 | } |
f2651434 CH |
9589 | spin_unlock(&all_mddevs_lock); |
9590 | ||
c744a65c N |
9591 | /* |
9592 | * certain more exotic SCSI devices are known to be | |
9593 | * volatile wrt too early system reboots. While the | |
9594 | * right place to handle this issue is the given | |
9595 | * driver, we do want to have a safe RAID driver ... | |
9596 | */ | |
9597 | if (need_delay) | |
7d959f6e | 9598 | msleep(1000); |
c744a65c | 9599 | |
1da177e4 LT |
9600 | return NOTIFY_DONE; |
9601 | } | |
9602 | ||
75c96f85 | 9603 | static struct notifier_block md_notifier = { |
1da177e4 LT |
9604 | .notifier_call = md_notify_reboot, |
9605 | .next = NULL, | |
9606 | .priority = INT_MAX, /* before any real devices */ | |
9607 | }; | |
9608 | ||
9609 | static void md_geninit(void) | |
9610 | { | |
36a4e1fe | 9611 | pr_debug("md: sizeof(mdp_super_t) = %d\n", (int)sizeof(mdp_super_t)); |
1da177e4 | 9612 | |
97a32539 | 9613 | proc_create("mdstat", S_IRUGO, NULL, &mdstat_proc_ops); |
1da177e4 LT |
9614 | } |
9615 | ||
75c96f85 | 9616 | static int __init md_init(void) |
1da177e4 | 9617 | { |
e804ac78 TH |
9618 | int ret = -ENOMEM; |
9619 | ||
ada609ee | 9620 | md_wq = alloc_workqueue("md", WQ_MEM_RECLAIM, 0); |
e804ac78 TH |
9621 | if (!md_wq) |
9622 | goto err_wq; | |
9623 | ||
9624 | md_misc_wq = alloc_workqueue("md_misc", 0, 0); | |
9625 | if (!md_misc_wq) | |
9626 | goto err_misc_wq; | |
9627 | ||
cc1ffe61 | 9628 | md_rdev_misc_wq = alloc_workqueue("md_rdev_misc", 0, 0); |
cf0b9b48 | 9629 | if (!md_rdev_misc_wq) |
cc1ffe61 GJ |
9630 | goto err_rdev_misc_wq; |
9631 | ||
28144f99 CH |
9632 | ret = __register_blkdev(MD_MAJOR, "md", md_probe); |
9633 | if (ret < 0) | |
e804ac78 TH |
9634 | goto err_md; |
9635 | ||
28144f99 CH |
9636 | ret = __register_blkdev(0, "mdp", md_probe); |
9637 | if (ret < 0) | |
e804ac78 TH |
9638 | goto err_mdp; |
9639 | mdp_major = ret; | |
9640 | ||
1da177e4 | 9641 | register_reboot_notifier(&md_notifier); |
0b4d4147 | 9642 | raid_table_header = register_sysctl_table(raid_root_table); |
1da177e4 LT |
9643 | |
9644 | md_geninit(); | |
d710e138 | 9645 | return 0; |
1da177e4 | 9646 | |
e804ac78 TH |
9647 | err_mdp: |
9648 | unregister_blkdev(MD_MAJOR, "md"); | |
9649 | err_md: | |
cc1ffe61 GJ |
9650 | destroy_workqueue(md_rdev_misc_wq); |
9651 | err_rdev_misc_wq: | |
e804ac78 TH |
9652 | destroy_workqueue(md_misc_wq); |
9653 | err_misc_wq: | |
9654 | destroy_workqueue(md_wq); | |
9655 | err_wq: | |
9656 | return ret; | |
9657 | } | |
1da177e4 | 9658 | |
70bcecdb | 9659 | static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev) |
1d7e3e96 | 9660 | { |
70bcecdb | 9661 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
f7c7a2f9 | 9662 | struct md_rdev *rdev2, *tmp; |
70bcecdb | 9663 | int role, ret; |
1d7e3e96 | 9664 | |
818da59f GJ |
9665 | /* |
9666 | * If size is changed in another node then we need to | |
9667 | * do resize as well. | |
9668 | */ | |
9669 | if (mddev->dev_sectors != le64_to_cpu(sb->size)) { | |
9670 | ret = mddev->pers->resize(mddev, le64_to_cpu(sb->size)); | |
9671 | if (ret) | |
9672 | pr_info("md-cluster: resize failed\n"); | |
9673 | else | |
e64e4018 | 9674 | md_bitmap_update_sb(mddev->bitmap); |
818da59f GJ |
9675 | } |
9676 | ||
70bcecdb | 9677 | /* Check for change of roles in the active devices */ |
f7c7a2f9 | 9678 | rdev_for_each_safe(rdev2, tmp, mddev) { |
70bcecdb GR |
9679 | if (test_bit(Faulty, &rdev2->flags)) |
9680 | continue; | |
9681 | ||
9682 | /* Check if the roles changed */ | |
9683 | role = le16_to_cpu(sb->dev_roles[rdev2->desc_nr]); | |
dbb64f86 GR |
9684 | |
9685 | if (test_bit(Candidate, &rdev2->flags)) { | |
9151ad5d | 9686 | if (role == MD_DISK_ROLE_FAULTY) { |
913cce5a CH |
9687 | pr_info("md: Removing Candidate device %pg because add failed\n", |
9688 | rdev2->bdev); | |
dbb64f86 GR |
9689 | md_kick_rdev_from_array(rdev2); |
9690 | continue; | |
9691 | } | |
9692 | else | |
9693 | clear_bit(Candidate, &rdev2->flags); | |
9694 | } | |
9695 | ||
70bcecdb | 9696 | if (role != rdev2->raid_disk) { |
ca1e98e0 GJ |
9697 | /* |
9698 | * got activated except reshape is happening. | |
9699 | */ | |
9151ad5d | 9700 | if (rdev2->raid_disk == -1 && role != MD_DISK_ROLE_SPARE && |
ca1e98e0 GJ |
9701 | !(le32_to_cpu(sb->feature_map) & |
9702 | MD_FEATURE_RESHAPE_ACTIVE)) { | |
70bcecdb GR |
9703 | rdev2->saved_raid_disk = role; |
9704 | ret = remove_and_add_spares(mddev, rdev2); | |
913cce5a CH |
9705 | pr_info("Activated spare: %pg\n", |
9706 | rdev2->bdev); | |
a578183e GJ |
9707 | /* wakeup mddev->thread here, so array could |
9708 | * perform resync with the new activated disk */ | |
9709 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9710 | md_wakeup_thread(mddev->thread); | |
70bcecdb GR |
9711 | } |
9712 | /* device faulty | |
9713 | * We just want to do the minimum to mark the disk | |
9714 | * as faulty. The recovery is performed by the | |
9715 | * one who initiated the error. | |
9716 | */ | |
9151ad5d DS |
9717 | if (role == MD_DISK_ROLE_FAULTY || |
9718 | role == MD_DISK_ROLE_JOURNAL) { | |
70bcecdb GR |
9719 | md_error(mddev, rdev2); |
9720 | clear_bit(Blocked, &rdev2->flags); | |
9721 | } | |
9722 | } | |
1d7e3e96 | 9723 | } |
70bcecdb | 9724 | |
a8da01f7 ZH |
9725 | if (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) { |
9726 | ret = update_raid_disks(mddev, le32_to_cpu(sb->raid_disks)); | |
9727 | if (ret) | |
9728 | pr_warn("md: updating array disks failed. %d\n", ret); | |
9729 | } | |
70bcecdb | 9730 | |
7564beda GJ |
9731 | /* |
9732 | * Since mddev->delta_disks has already updated in update_raid_disks, | |
9733 | * so it is time to check reshape. | |
9734 | */ | |
9735 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9736 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9737 | /* | |
9738 | * reshape is happening in the remote node, we need to | |
9739 | * update reshape_position and call start_reshape. | |
9740 | */ | |
ed4d0a4e | 9741 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); |
7564beda GJ |
9742 | if (mddev->pers->update_reshape_pos) |
9743 | mddev->pers->update_reshape_pos(mddev); | |
9744 | if (mddev->pers->start_reshape) | |
9745 | mddev->pers->start_reshape(mddev); | |
9746 | } else if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9747 | mddev->reshape_position != MaxSector && | |
9748 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9749 | /* reshape is just done in another node. */ | |
9750 | mddev->reshape_position = MaxSector; | |
9751 | if (mddev->pers->update_reshape_pos) | |
9752 | mddev->pers->update_reshape_pos(mddev); | |
9753 | } | |
9754 | ||
70bcecdb GR |
9755 | /* Finally set the event to be up to date */ |
9756 | mddev->events = le64_to_cpu(sb->events); | |
9757 | } | |
9758 | ||
9759 | static int read_rdev(struct mddev *mddev, struct md_rdev *rdev) | |
9760 | { | |
9761 | int err; | |
9762 | struct page *swapout = rdev->sb_page; | |
9763 | struct mdp_superblock_1 *sb; | |
9764 | ||
9765 | /* Store the sb page of the rdev in the swapout temporary | |
9766 | * variable in case we err in the future | |
9767 | */ | |
9768 | rdev->sb_page = NULL; | |
7f0f0d87 N |
9769 | err = alloc_disk_sb(rdev); |
9770 | if (err == 0) { | |
9771 | ClearPageUptodate(rdev->sb_page); | |
9772 | rdev->sb_loaded = 0; | |
9773 | err = super_types[mddev->major_version]. | |
9774 | load_super(rdev, NULL, mddev->minor_version); | |
9775 | } | |
70bcecdb GR |
9776 | if (err < 0) { |
9777 | pr_warn("%s: %d Could not reload rdev(%d) err: %d. Restoring old values\n", | |
9778 | __func__, __LINE__, rdev->desc_nr, err); | |
7f0f0d87 N |
9779 | if (rdev->sb_page) |
9780 | put_page(rdev->sb_page); | |
70bcecdb GR |
9781 | rdev->sb_page = swapout; |
9782 | rdev->sb_loaded = 1; | |
9783 | return err; | |
1d7e3e96 GR |
9784 | } |
9785 | ||
70bcecdb GR |
9786 | sb = page_address(rdev->sb_page); |
9787 | /* Read the offset unconditionally, even if MD_FEATURE_RECOVERY_OFFSET | |
9788 | * is not set | |
9789 | */ | |
9790 | ||
9791 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)) | |
9792 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); | |
9793 | ||
9794 | /* The other node finished recovery, call spare_active to set | |
9795 | * device In_sync and mddev->degraded | |
9796 | */ | |
9797 | if (rdev->recovery_offset == MaxSector && | |
9798 | !test_bit(In_sync, &rdev->flags) && | |
9799 | mddev->pers->spare_active(mddev)) | |
e1a86dbb | 9800 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
70bcecdb GR |
9801 | |
9802 | put_page(swapout); | |
9803 | return 0; | |
9804 | } | |
9805 | ||
9806 | void md_reload_sb(struct mddev *mddev, int nr) | |
9807 | { | |
64c54d92 | 9808 | struct md_rdev *rdev = NULL, *iter; |
70bcecdb GR |
9809 | int err; |
9810 | ||
9811 | /* Find the rdev */ | |
64c54d92 XT |
9812 | rdev_for_each_rcu(iter, mddev) { |
9813 | if (iter->desc_nr == nr) { | |
9814 | rdev = iter; | |
70bcecdb | 9815 | break; |
64c54d92 | 9816 | } |
70bcecdb GR |
9817 | } |
9818 | ||
64c54d92 | 9819 | if (!rdev) { |
70bcecdb GR |
9820 | pr_warn("%s: %d Could not find rdev with nr %d\n", __func__, __LINE__, nr); |
9821 | return; | |
9822 | } | |
9823 | ||
9824 | err = read_rdev(mddev, rdev); | |
9825 | if (err < 0) | |
9826 | return; | |
9827 | ||
9828 | check_sb_changes(mddev, rdev); | |
9829 | ||
9830 | /* Read all rdev's to update recovery_offset */ | |
0ea9924a GJ |
9831 | rdev_for_each_rcu(rdev, mddev) { |
9832 | if (!test_bit(Faulty, &rdev->flags)) | |
9833 | read_rdev(mddev, rdev); | |
9834 | } | |
1d7e3e96 GR |
9835 | } |
9836 | EXPORT_SYMBOL(md_reload_sb); | |
9837 | ||
1da177e4 LT |
9838 | #ifndef MODULE |
9839 | ||
9840 | /* | |
9841 | * Searches all registered partitions for autorun RAID arrays | |
9842 | * at boot time. | |
9843 | */ | |
4d936ec1 | 9844 | |
5b1f5bc3 | 9845 | static DEFINE_MUTEX(detected_devices_mutex); |
4d936ec1 ME |
9846 | static LIST_HEAD(all_detected_devices); |
9847 | struct detected_devices_node { | |
9848 | struct list_head list; | |
9849 | dev_t dev; | |
9850 | }; | |
1da177e4 LT |
9851 | |
9852 | void md_autodetect_dev(dev_t dev) | |
9853 | { | |
4d936ec1 ME |
9854 | struct detected_devices_node *node_detected_dev; |
9855 | ||
9856 | node_detected_dev = kzalloc(sizeof(*node_detected_dev), GFP_KERNEL); | |
9857 | if (node_detected_dev) { | |
9858 | node_detected_dev->dev = dev; | |
5b1f5bc3 | 9859 | mutex_lock(&detected_devices_mutex); |
4d936ec1 | 9860 | list_add_tail(&node_detected_dev->list, &all_detected_devices); |
5b1f5bc3 | 9861 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9862 | } |
1da177e4 LT |
9863 | } |
9864 | ||
d82fa81c | 9865 | void md_autostart_arrays(int part) |
1da177e4 | 9866 | { |
3cb03002 | 9867 | struct md_rdev *rdev; |
4d936ec1 ME |
9868 | struct detected_devices_node *node_detected_dev; |
9869 | dev_t dev; | |
9870 | int i_scanned, i_passed; | |
1da177e4 | 9871 | |
4d936ec1 ME |
9872 | i_scanned = 0; |
9873 | i_passed = 0; | |
1da177e4 | 9874 | |
9d48739e | 9875 | pr_info("md: Autodetecting RAID arrays.\n"); |
1da177e4 | 9876 | |
5b1f5bc3 | 9877 | mutex_lock(&detected_devices_mutex); |
4d936ec1 ME |
9878 | while (!list_empty(&all_detected_devices) && i_scanned < INT_MAX) { |
9879 | i_scanned++; | |
9880 | node_detected_dev = list_entry(all_detected_devices.next, | |
9881 | struct detected_devices_node, list); | |
9882 | list_del(&node_detected_dev->list); | |
9883 | dev = node_detected_dev->dev; | |
9884 | kfree(node_detected_dev); | |
90bcf133 | 9885 | mutex_unlock(&detected_devices_mutex); |
df968c4e | 9886 | rdev = md_import_device(dev,0, 90); |
90bcf133 | 9887 | mutex_lock(&detected_devices_mutex); |
1da177e4 LT |
9888 | if (IS_ERR(rdev)) |
9889 | continue; | |
9890 | ||
403df478 | 9891 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 9892 | continue; |
403df478 | 9893 | |
d0fae18f | 9894 | set_bit(AutoDetected, &rdev->flags); |
1da177e4 | 9895 | list_add(&rdev->same_set, &pending_raid_disks); |
4d936ec1 | 9896 | i_passed++; |
1da177e4 | 9897 | } |
5b1f5bc3 | 9898 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9899 | |
9d48739e | 9900 | pr_debug("md: Scanned %d and added %d devices.\n", i_scanned, i_passed); |
1da177e4 LT |
9901 | |
9902 | autorun_devices(part); | |
9903 | } | |
9904 | ||
fdee8ae4 | 9905 | #endif /* !MODULE */ |
1da177e4 LT |
9906 | |
9907 | static __exit void md_exit(void) | |
9908 | { | |
16648bac | 9909 | struct mddev *mddev, *n; |
e2f23b60 | 9910 | int delay = 1; |
8ab5e4c1 | 9911 | |
3dbd8c2e | 9912 | unregister_blkdev(MD_MAJOR,"md"); |
1da177e4 LT |
9913 | unregister_blkdev(mdp_major, "mdp"); |
9914 | unregister_reboot_notifier(&md_notifier); | |
9915 | unregister_sysctl_table(raid_table_header); | |
e2f23b60 N |
9916 | |
9917 | /* We cannot unload the modules while some process is | |
9918 | * waiting for us in select() or poll() - wake them up | |
9919 | */ | |
9920 | md_unloading = 1; | |
9921 | while (waitqueue_active(&md_event_waiters)) { | |
9922 | /* not safe to leave yet */ | |
9923 | wake_up(&md_event_waiters); | |
9924 | msleep(delay); | |
9925 | delay += delay; | |
9926 | } | |
1da177e4 | 9927 | remove_proc_entry("mdstat", NULL); |
e2f23b60 | 9928 | |
16648bac CH |
9929 | spin_lock(&all_mddevs_lock); |
9930 | list_for_each_entry_safe(mddev, n, &all_mddevs, all_mddevs) { | |
12a6caf2 CH |
9931 | if (!mddev_get(mddev)) |
9932 | continue; | |
16648bac | 9933 | spin_unlock(&all_mddevs_lock); |
1da177e4 | 9934 | export_array(mddev); |
9356863c | 9935 | mddev->ctime = 0; |
d3374825 | 9936 | mddev->hold_active = 0; |
9356863c | 9937 | /* |
16648bac CH |
9938 | * As the mddev is now fully clear, mddev_put will schedule |
9939 | * the mddev for destruction by a workqueue, and the | |
9356863c N |
9940 | * destroy_workqueue() below will wait for that to complete. |
9941 | */ | |
16648bac CH |
9942 | mddev_put(mddev); |
9943 | spin_lock(&all_mddevs_lock); | |
1da177e4 | 9944 | } |
16648bac CH |
9945 | spin_unlock(&all_mddevs_lock); |
9946 | ||
cc1ffe61 | 9947 | destroy_workqueue(md_rdev_misc_wq); |
e804ac78 TH |
9948 | destroy_workqueue(md_misc_wq); |
9949 | destroy_workqueue(md_wq); | |
1da177e4 LT |
9950 | } |
9951 | ||
685784aa | 9952 | subsys_initcall(md_init); |
1da177e4 LT |
9953 | module_exit(md_exit) |
9954 | ||
e4dca7b7 | 9955 | static int get_ro(char *buffer, const struct kernel_param *kp) |
f91de92e | 9956 | { |
3f99980c | 9957 | return sprintf(buffer, "%d\n", start_readonly); |
f91de92e | 9958 | } |
e4dca7b7 | 9959 | static int set_ro(const char *val, const struct kernel_param *kp) |
f91de92e | 9960 | { |
4c9309c0 | 9961 | return kstrtouint(val, 10, (unsigned int *)&start_readonly); |
f91de92e N |
9962 | } |
9963 | ||
80ca3a44 N |
9964 | module_param_call(start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR); |
9965 | module_param(start_dirty_degraded, int, S_IRUGO|S_IWUSR); | |
efeb53c0 | 9966 | module_param_call(new_array, add_named_array, NULL, NULL, S_IWUSR); |
78b6350d | 9967 | module_param(create_on_open, bool, S_IRUSR|S_IWUSR); |
f91de92e | 9968 | |
1da177e4 | 9969 | MODULE_LICENSE("GPL"); |
0efb9e61 | 9970 | MODULE_DESCRIPTION("MD RAID framework"); |
aa1595e9 | 9971 | MODULE_ALIAS("md"); |
72008652 | 9972 | MODULE_ALIAS_BLOCKDEV_MAJOR(MD_MAJOR); |