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 | |
44693154 | 73 | /* pers_list is a list of registered personalities protected by pers_lock. */ |
2604b703 | 74 | static LIST_HEAD(pers_list); |
1da177e4 LT |
75 | static DEFINE_SPINLOCK(pers_lock); |
76 | ||
4d72a9de | 77 | static const struct kobj_type md_ktype; |
28dec870 | 78 | |
edb39c9d | 79 | struct md_cluster_operations *md_cluster_ops; |
589a1c49 | 80 | EXPORT_SYMBOL(md_cluster_ops); |
2b598ee5 | 81 | static struct module *md_cluster_mod; |
edb39c9d | 82 | |
90b08710 | 83 | static DECLARE_WAIT_QUEUE_HEAD(resync_wait); |
e804ac78 | 84 | static struct workqueue_struct *md_wq; |
db29d79b YK |
85 | |
86 | /* | |
87 | * This workqueue is used for sync_work to register new sync_thread, and for | |
88 | * del_work to remove rdev, and for event_work that is only set by dm-raid. | |
89 | * | |
90 | * Noted that sync_work will grab reconfig_mutex, hence never flush this | |
91 | * workqueue whith reconfig_mutex grabbed. | |
92 | */ | |
e804ac78 | 93 | static struct workqueue_struct *md_misc_wq; |
a022325a | 94 | struct workqueue_struct *md_bitmap_wq; |
90b08710 | 95 | |
746d3207 N |
96 | static int remove_and_add_spares(struct mddev *mddev, |
97 | struct md_rdev *this); | |
5aa61f42 | 98 | static void mddev_detach(struct mddev *mddev); |
3ce94ce5 | 99 | static void export_rdev(struct md_rdev *rdev, struct mddev *mddev); |
44693154 | 100 | static void md_wakeup_thread_directly(struct md_thread __rcu *thread); |
746d3207 | 101 | |
78b7b13f YK |
102 | enum md_ro_state { |
103 | MD_RDWR, | |
104 | MD_RDONLY, | |
105 | MD_AUTO_READ, | |
106 | MD_MAX_STATE | |
107 | }; | |
108 | ||
109 | static bool md_is_rdwr(struct mddev *mddev) | |
110 | { | |
111 | return (mddev->ro == MD_RDWR); | |
112 | } | |
113 | ||
1e50915f RB |
114 | /* |
115 | * Default number of read corrections we'll attempt on an rdev | |
116 | * before ejecting it from the array. We divide the read error | |
117 | * count by 2 for every hour elapsed between read errors. | |
118 | */ | |
119 | #define MD_DEFAULT_MAX_CORRECTED_READ_ERRORS 20 | |
7c9d5c54 ZH |
120 | /* Default safemode delay: 200 msec */ |
121 | #define DEFAULT_SAFEMODE_DELAY ((200 * HZ)/1000 +1) | |
1da177e4 LT |
122 | /* |
123 | * Current RAID-1,4,5 parallel reconstruction 'guaranteed speed limit' | |
124 | * is 1000 KB/sec, so the extra system load does not show up that much. | |
125 | * Increase it if you want to have more _guaranteed_ speed. Note that | |
338cec32 | 126 | * the RAID driver will use the maximum available bandwidth if the IO |
1da177e4 LT |
127 | * subsystem is idle. There is also an 'absolute maximum' reconstruction |
128 | * speed limit - in case reconstruction slows down your system despite | |
129 | * idle IO detection. | |
130 | * | |
131 | * you can change it via /proc/sys/dev/raid/speed_limit_min and _max. | |
88202a0c | 132 | * or /sys/block/mdX/md/sync_speed_{min,max} |
1da177e4 LT |
133 | */ |
134 | ||
135 | static int sysctl_speed_limit_min = 1000; | |
136 | static int sysctl_speed_limit_max = 200000; | |
fd01b88c | 137 | static inline int speed_min(struct mddev *mddev) |
88202a0c N |
138 | { |
139 | return mddev->sync_speed_min ? | |
140 | mddev->sync_speed_min : sysctl_speed_limit_min; | |
141 | } | |
142 | ||
fd01b88c | 143 | static inline int speed_max(struct mddev *mddev) |
88202a0c N |
144 | { |
145 | return mddev->sync_speed_max ? | |
146 | mddev->sync_speed_max : sysctl_speed_limit_max; | |
147 | } | |
1da177e4 | 148 | |
69b00b5b GJ |
149 | static void rdev_uninit_serial(struct md_rdev *rdev) |
150 | { | |
151 | if (!test_and_clear_bit(CollisionCheck, &rdev->flags)) | |
152 | return; | |
153 | ||
025471f9 | 154 | kvfree(rdev->serial); |
69b00b5b GJ |
155 | rdev->serial = NULL; |
156 | } | |
157 | ||
158 | static void rdevs_uninit_serial(struct mddev *mddev) | |
159 | { | |
160 | struct md_rdev *rdev; | |
161 | ||
162 | rdev_for_each(rdev, mddev) | |
163 | rdev_uninit_serial(rdev); | |
164 | } | |
165 | ||
404659cf | 166 | static int rdev_init_serial(struct md_rdev *rdev) |
3e148a32 | 167 | { |
025471f9 GJ |
168 | /* serial_nums equals with BARRIER_BUCKETS_NR */ |
169 | int i, serial_nums = 1 << ((PAGE_SHIFT - ilog2(sizeof(atomic_t)))); | |
69b00b5b GJ |
170 | struct serial_in_rdev *serial = NULL; |
171 | ||
172 | if (test_bit(CollisionCheck, &rdev->flags)) | |
173 | return 0; | |
174 | ||
025471f9 GJ |
175 | serial = kvmalloc(sizeof(struct serial_in_rdev) * serial_nums, |
176 | GFP_KERNEL); | |
69b00b5b GJ |
177 | if (!serial) |
178 | return -ENOMEM; | |
179 | ||
025471f9 GJ |
180 | for (i = 0; i < serial_nums; i++) { |
181 | struct serial_in_rdev *serial_tmp = &serial[i]; | |
182 | ||
183 | spin_lock_init(&serial_tmp->serial_lock); | |
184 | serial_tmp->serial_rb = RB_ROOT_CACHED; | |
185 | init_waitqueue_head(&serial_tmp->serial_io_wait); | |
186 | } | |
187 | ||
69b00b5b | 188 | rdev->serial = serial; |
404659cf | 189 | set_bit(CollisionCheck, &rdev->flags); |
3e148a32 | 190 | |
69b00b5b | 191 | return 0; |
3e148a32 GJ |
192 | } |
193 | ||
69b00b5b | 194 | static int rdevs_init_serial(struct mddev *mddev) |
11d3a9f6 GJ |
195 | { |
196 | struct md_rdev *rdev; | |
69b00b5b | 197 | int ret = 0; |
11d3a9f6 GJ |
198 | |
199 | rdev_for_each(rdev, mddev) { | |
69b00b5b GJ |
200 | ret = rdev_init_serial(rdev); |
201 | if (ret) | |
202 | break; | |
11d3a9f6 | 203 | } |
69b00b5b GJ |
204 | |
205 | /* Free all resources if pool is not existed */ | |
206 | if (ret && !mddev->serial_info_pool) | |
207 | rdevs_uninit_serial(mddev); | |
208 | ||
209 | return ret; | |
11d3a9f6 GJ |
210 | } |
211 | ||
963c555e | 212 | /* |
de31ee94 GJ |
213 | * rdev needs to enable serial stuffs if it meets the conditions: |
214 | * 1. it is multi-queue device flaged with writemostly. | |
215 | * 2. the write-behind mode is enabled. | |
216 | */ | |
217 | static int rdev_need_serial(struct md_rdev *rdev) | |
218 | { | |
219 | return (rdev && rdev->mddev->bitmap_info.max_write_behind > 0 && | |
e556f6ba | 220 | rdev->bdev->bd_disk->queue->nr_hw_queues != 1 && |
de31ee94 GJ |
221 | test_bit(WriteMostly, &rdev->flags)); |
222 | } | |
223 | ||
224 | /* | |
225 | * Init resource for rdev(s), then create serial_info_pool if: | |
226 | * 1. rdev is the first device which return true from rdev_enable_serial. | |
227 | * 2. rdev is NULL, means we want to enable serialization for all rdevs. | |
963c555e | 228 | */ |
b4128c00 | 229 | void mddev_create_serial_pool(struct mddev *mddev, struct md_rdev *rdev) |
963c555e | 230 | { |
69b00b5b GJ |
231 | int ret = 0; |
232 | ||
de31ee94 GJ |
233 | if (rdev && !rdev_need_serial(rdev) && |
234 | !test_bit(CollisionCheck, &rdev->flags)) | |
963c555e GJ |
235 | return; |
236 | ||
de31ee94 | 237 | if (!rdev) |
69b00b5b | 238 | ret = rdevs_init_serial(mddev); |
de31ee94 | 239 | else |
69b00b5b GJ |
240 | ret = rdev_init_serial(rdev); |
241 | if (ret) | |
b4128c00 | 242 | return; |
de31ee94 | 243 | |
404659cf | 244 | if (mddev->serial_info_pool == NULL) { |
3024ba2d CL |
245 | /* |
246 | * already in memalloc noio context by | |
247 | * mddev_suspend() | |
248 | */ | |
404659cf GJ |
249 | mddev->serial_info_pool = |
250 | mempool_create_kmalloc_pool(NR_SERIAL_INFOS, | |
251 | sizeof(struct serial_info)); | |
69b00b5b GJ |
252 | if (!mddev->serial_info_pool) { |
253 | rdevs_uninit_serial(mddev); | |
404659cf | 254 | pr_err("can't alloc memory pool for serialization\n"); |
69b00b5b | 255 | } |
963c555e GJ |
256 | } |
257 | } | |
963c555e GJ |
258 | |
259 | /* | |
de31ee94 GJ |
260 | * Free resource from rdev(s), and destroy serial_info_pool under conditions: |
261 | * 1. rdev is the last device flaged with CollisionCheck. | |
262 | * 2. when bitmap is destroyed while policy is not enabled. | |
263 | * 3. for disable policy, the pool is destroyed only when no rdev needs it. | |
963c555e | 264 | */ |
b4128c00 | 265 | void mddev_destroy_serial_pool(struct mddev *mddev, struct md_rdev *rdev) |
963c555e | 266 | { |
11d3a9f6 | 267 | if (rdev && !test_bit(CollisionCheck, &rdev->flags)) |
963c555e GJ |
268 | return; |
269 | ||
404659cf | 270 | if (mddev->serial_info_pool) { |
963c555e | 271 | struct md_rdev *temp; |
de31ee94 | 272 | int num = 0; /* used to track if other rdevs need the pool */ |
963c555e | 273 | |
11d3a9f6 GJ |
274 | rdev_for_each(temp, mddev) { |
275 | if (!rdev) { | |
69b00b5b GJ |
276 | if (!mddev->serialize_policy || |
277 | !rdev_need_serial(temp)) | |
278 | rdev_uninit_serial(temp); | |
de31ee94 GJ |
279 | else |
280 | num++; | |
281 | } else if (temp != rdev && | |
282 | test_bit(CollisionCheck, &temp->flags)) | |
963c555e | 283 | num++; |
11d3a9f6 GJ |
284 | } |
285 | ||
286 | if (rdev) | |
69b00b5b | 287 | rdev_uninit_serial(rdev); |
de31ee94 GJ |
288 | |
289 | if (num) | |
290 | pr_info("The mempool could be used by other devices\n"); | |
291 | else { | |
404659cf GJ |
292 | mempool_destroy(mddev->serial_info_pool); |
293 | mddev->serial_info_pool = NULL; | |
963c555e GJ |
294 | } |
295 | } | |
296 | } | |
297 | ||
1da177e4 LT |
298 | static struct ctl_table_header *raid_table_header; |
299 | ||
82592c38 | 300 | static struct ctl_table raid_table[] = { |
1da177e4 | 301 | { |
1da177e4 LT |
302 | .procname = "speed_limit_min", |
303 | .data = &sysctl_speed_limit_min, | |
304 | .maxlen = sizeof(int), | |
80ca3a44 | 305 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 306 | .proc_handler = proc_dointvec, |
1da177e4 LT |
307 | }, |
308 | { | |
1da177e4 LT |
309 | .procname = "speed_limit_max", |
310 | .data = &sysctl_speed_limit_max, | |
311 | .maxlen = sizeof(int), | |
80ca3a44 | 312 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 313 | .proc_handler = proc_dointvec, |
1da177e4 | 314 | }, |
1da177e4 LT |
315 | }; |
316 | ||
f91de92e N |
317 | static int start_readonly; |
318 | ||
78b6350d N |
319 | /* |
320 | * The original mechanism for creating an md device is to create | |
321 | * a device node in /dev and to open it. This causes races with device-close. | |
322 | * The preferred method is to write to the "new_array" module parameter. | |
323 | * This can avoid races. | |
324 | * Setting create_on_open to false disables the original mechanism | |
325 | * so all the races disappear. | |
326 | */ | |
327 | static bool create_on_open = true; | |
328 | ||
d7603b7e N |
329 | /* |
330 | * We have a system wide 'event count' that is incremented | |
331 | * on any 'interesting' event, and readers of /proc/mdstat | |
332 | * can use 'poll' or 'select' to find out when the event | |
333 | * count increases. | |
334 | * | |
335 | * Events are: | |
336 | * start array, stop array, error, add device, remove device, | |
337 | * start build, activate spare | |
338 | */ | |
2989ddbd | 339 | static DECLARE_WAIT_QUEUE_HEAD(md_event_waiters); |
d7603b7e | 340 | static atomic_t md_event_count; |
54679486 | 341 | void md_new_event(void) |
d7603b7e N |
342 | { |
343 | atomic_inc(&md_event_count); | |
344 | wake_up(&md_event_waiters); | |
345 | } | |
29269553 | 346 | EXPORT_SYMBOL_GPL(md_new_event); |
d7603b7e | 347 | |
1da177e4 LT |
348 | /* |
349 | * Enables to iterate over all existing md arrays | |
350 | * all_mddevs_lock protects this list. | |
351 | */ | |
352 | static LIST_HEAD(all_mddevs); | |
353 | static DEFINE_SPINLOCK(all_mddevs_lock); | |
354 | ||
78b7b13f YK |
355 | static bool is_md_suspended(struct mddev *mddev) |
356 | { | |
357 | return percpu_ref_is_dying(&mddev->active_io); | |
358 | } | |
409c57f3 N |
359 | /* Rather than calling directly into the personality make_request function, |
360 | * IO requests come here first so that we can check if the device is | |
361 | * being suspended pending a reconfiguration. | |
362 | * We hold a refcount over the call to ->make_request. By the time that | |
363 | * call has finished, the bio has been linked into some internal structure | |
364 | * and so is visible to ->quiesce(), so we don't need the refcount any more. | |
365 | */ | |
b3143b9a N |
366 | static bool is_suspended(struct mddev *mddev, struct bio *bio) |
367 | { | |
d1932913 | 368 | if (is_md_suspended(mddev)) |
b3143b9a N |
369 | return true; |
370 | if (bio_data_dir(bio) != WRITE) | |
371 | return false; | |
617787f1 | 372 | if (READ_ONCE(mddev->suspend_lo) >= READ_ONCE(mddev->suspend_hi)) |
b3143b9a | 373 | return false; |
617787f1 | 374 | if (bio->bi_iter.bi_sector >= READ_ONCE(mddev->suspend_hi)) |
b3143b9a | 375 | return false; |
617787f1 | 376 | if (bio_end_sector(bio) < READ_ONCE(mddev->suspend_lo)) |
b3143b9a N |
377 | return false; |
378 | return true; | |
379 | } | |
380 | ||
393debc2 SL |
381 | void md_handle_request(struct mddev *mddev, struct bio *bio) |
382 | { | |
383 | check_suspended: | |
b3143b9a | 384 | if (is_suspended(mddev, bio)) { |
393debc2 | 385 | DEFINE_WAIT(__wait); |
f51d46d0 VV |
386 | /* Bail out if REQ_NOWAIT is set for the bio */ |
387 | if (bio->bi_opf & REQ_NOWAIT) { | |
f51d46d0 VV |
388 | bio_wouldblock_error(bio); |
389 | return; | |
390 | } | |
393debc2 SL |
391 | for (;;) { |
392 | prepare_to_wait(&mddev->sb_wait, &__wait, | |
393 | TASK_UNINTERRUPTIBLE); | |
b3143b9a | 394 | if (!is_suspended(mddev, bio)) |
393debc2 | 395 | break; |
393debc2 | 396 | schedule(); |
393debc2 SL |
397 | } |
398 | finish_wait(&mddev->sb_wait, &__wait); | |
399 | } | |
72adae23 XN |
400 | if (!percpu_ref_tryget_live(&mddev->active_io)) |
401 | goto check_suspended; | |
393debc2 SL |
402 | |
403 | if (!mddev->pers->make_request(mddev, bio)) { | |
72adae23 | 404 | percpu_ref_put(&mddev->active_io); |
393debc2 SL |
405 | goto check_suspended; |
406 | } | |
407 | ||
72adae23 | 408 | percpu_ref_put(&mddev->active_io); |
393debc2 SL |
409 | } |
410 | EXPORT_SYMBOL(md_handle_request); | |
411 | ||
3e08773c | 412 | static void md_submit_bio(struct bio *bio) |
1da177e4 | 413 | { |
49077326 | 414 | const int rw = bio_data_dir(bio); |
309dca30 | 415 | struct mddev *mddev = bio->bi_bdev->bd_disk->private_data; |
49077326 | 416 | |
9a5a8597 | 417 | if (mddev == NULL || mddev->pers == NULL) { |
62f7b198 | 418 | bio_io_error(bio); |
3e08773c | 419 | return; |
62f7b198 GP |
420 | } |
421 | ||
9a5a8597 | 422 | if (unlikely(test_bit(MD_BROKEN, &mddev->flags)) && (rw == WRITE)) { |
409c57f3 | 423 | bio_io_error(bio); |
3e08773c | 424 | return; |
409c57f3 | 425 | } |
9a5a8597 | 426 | |
5a97806f | 427 | bio = bio_split_to_limits(bio); |
613b1488 JA |
428 | if (!bio) |
429 | return; | |
9a5a8597 | 430 | |
f97a5528 | 431 | if (mddev->ro == MD_RDONLY && unlikely(rw == WRITE)) { |
4246a0b6 | 432 | if (bio_sectors(bio) != 0) |
4e4cbee9 | 433 | bio->bi_status = BLK_STS_IOERR; |
4246a0b6 | 434 | bio_endio(bio); |
3e08773c | 435 | return; |
bbfa57c0 | 436 | } |
49077326 | 437 | |
9c573de3 | 438 | /* bio could be mergeable after passing to underlayer */ |
1eff9d32 | 439 | bio->bi_opf &= ~REQ_NOMERGE; |
393debc2 SL |
440 | |
441 | md_handle_request(mddev, bio); | |
409c57f3 N |
442 | } |
443 | ||
4717c028 YK |
444 | /* |
445 | * Make sure no new requests are submitted to the device, and any requests that | |
446 | * have been submitted are completely handled. | |
9e35b99c | 447 | */ |
2b16a525 | 448 | int mddev_suspend(struct mddev *mddev, bool interruptible) |
409c57f3 | 449 | { |
714d2015 | 450 | int err = 0; |
44693154 | 451 | |
714d2015 YK |
452 | /* |
453 | * hold reconfig_mutex to wait for normal io will deadlock, because | |
454 | * other context can't update super_block, and normal io can rely on | |
455 | * updating super_block. | |
456 | */ | |
457 | lockdep_assert_not_held(&mddev->reconfig_mutex); | |
3e00777d | 458 | |
714d2015 YK |
459 | if (interruptible) |
460 | err = mutex_lock_interruptible(&mddev->suspend_mutex); | |
461 | else | |
462 | mutex_lock(&mddev->suspend_mutex); | |
463 | if (err) | |
464 | return err; | |
3e00777d | 465 | |
714d2015 YK |
466 | if (mddev->suspended) { |
467 | WRITE_ONCE(mddev->suspended, mddev->suspended + 1); | |
468 | mutex_unlock(&mddev->suspend_mutex); | |
469 | return 0; | |
470 | } | |
471 | ||
472 | percpu_ref_kill(&mddev->active_io); | |
473 | if (interruptible) | |
474 | err = wait_event_interruptible(mddev->sb_wait, | |
475 | percpu_ref_is_zero(&mddev->active_io)); | |
476 | else | |
477 | wait_event(mddev->sb_wait, | |
478 | percpu_ref_is_zero(&mddev->active_io)); | |
479 | if (err) { | |
480 | percpu_ref_resurrect(&mddev->active_io); | |
481 | mutex_unlock(&mddev->suspend_mutex); | |
482 | return err; | |
483 | } | |
484 | ||
485 | /* | |
486 | * For raid456, io might be waiting for reshape to make progress, | |
487 | * allow new reshape to start while waiting for io to be done to | |
488 | * prevent deadlock. | |
489 | */ | |
490 | WRITE_ONCE(mddev->suspended, mddev->suspended + 1); | |
0d9f4f13 JB |
491 | |
492 | del_timer_sync(&mddev->safemode_timer); | |
78f57ef9 CL |
493 | /* restrict memory reclaim I/O during raid array is suspend */ |
494 | mddev->noio_flag = memalloc_noio_save(); | |
714d2015 YK |
495 | |
496 | mutex_unlock(&mddev->suspend_mutex); | |
497 | return 0; | |
409c57f3 | 498 | } |
390ee602 | 499 | EXPORT_SYMBOL_GPL(mddev_suspend); |
409c57f3 | 500 | |
b3911334 | 501 | static void __mddev_resume(struct mddev *mddev, bool recovery_needed) |
409c57f3 | 502 | { |
714d2015 YK |
503 | lockdep_assert_not_held(&mddev->reconfig_mutex); |
504 | ||
505 | mutex_lock(&mddev->suspend_mutex); | |
506 | WRITE_ONCE(mddev->suspended, mddev->suspended - 1); | |
507 | if (mddev->suspended) { | |
508 | mutex_unlock(&mddev->suspend_mutex); | |
0dc10e50 | 509 | return; |
714d2015 | 510 | } |
e24ed043 YK |
511 | |
512 | /* entred the memalloc scope from mddev_suspend() */ | |
513 | memalloc_noio_restore(mddev->noio_flag); | |
514 | ||
72adae23 | 515 | percpu_ref_resurrect(&mddev->active_io); |
409c57f3 | 516 | wake_up(&mddev->sb_wait); |
0fd018af | 517 | |
b3911334 YK |
518 | if (recovery_needed) |
519 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
0fd018af JB |
520 | md_wakeup_thread(mddev->thread); |
521 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
714d2015 YK |
522 | |
523 | mutex_unlock(&mddev->suspend_mutex); | |
1da177e4 | 524 | } |
b3911334 YK |
525 | |
526 | void mddev_resume(struct mddev *mddev) | |
527 | { | |
528 | return __mddev_resume(mddev, true); | |
529 | } | |
390ee602 | 530 | EXPORT_SYMBOL_GPL(mddev_resume); |
1da177e4 | 531 | |
a2826aa9 | 532 | /* |
e9c7469b | 533 | * Generic flush handling for md |
a2826aa9 N |
534 | */ |
535 | ||
4bc034d3 | 536 | static void md_end_flush(struct bio *bio) |
a2826aa9 | 537 | { |
4bc034d3 N |
538 | struct md_rdev *rdev = bio->bi_private; |
539 | struct mddev *mddev = rdev->mddev; | |
a2826aa9 | 540 | |
341097ee MP |
541 | bio_put(bio); |
542 | ||
a2826aa9 N |
543 | rdev_dec_pending(rdev, mddev); |
544 | ||
4bc034d3 | 545 | if (atomic_dec_and_test(&mddev->flush_pending)) { |
fa2bbff7 YK |
546 | /* The pair is percpu_ref_get() from md_flush_request() */ |
547 | percpu_ref_put(&mddev->active_io); | |
548 | ||
4bc034d3 N |
549 | /* The pre-request flush has finished */ |
550 | queue_work(md_wq, &mddev->flush_work); | |
a2826aa9 | 551 | } |
5a409b4f | 552 | } |
a7a07e69 | 553 | |
4bc034d3 N |
554 | static void md_submit_flush_data(struct work_struct *ws); |
555 | ||
556 | static void submit_flushes(struct work_struct *ws) | |
a2826aa9 | 557 | { |
4bc034d3 | 558 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); |
3cb03002 | 559 | struct md_rdev *rdev; |
a2826aa9 | 560 | |
2bc13b83 | 561 | mddev->start_flush = ktime_get_boottime(); |
4bc034d3 N |
562 | INIT_WORK(&mddev->flush_work, md_submit_flush_data); |
563 | atomic_set(&mddev->flush_pending, 1); | |
a2826aa9 | 564 | rcu_read_lock(); |
dafb20fa | 565 | rdev_for_each_rcu(rdev, mddev) |
a2826aa9 N |
566 | if (rdev->raid_disk >= 0 && |
567 | !test_bit(Faulty, &rdev->flags)) { | |
a2826aa9 | 568 | struct bio *bi; |
fa2bbff7 | 569 | |
a2826aa9 N |
570 | atomic_inc(&rdev->nr_pending); |
571 | rcu_read_unlock(); | |
609be106 CH |
572 | bi = bio_alloc_bioset(rdev->bdev, 0, |
573 | REQ_OP_WRITE | REQ_PREFLUSH, | |
574 | GFP_NOIO, &mddev->bio_set); | |
5a409b4f | 575 | bi->bi_end_io = md_end_flush; |
4bc034d3 | 576 | bi->bi_private = rdev; |
4bc034d3 | 577 | atomic_inc(&mddev->flush_pending); |
4e49ea4a | 578 | submit_bio(bi); |
a2826aa9 | 579 | rcu_read_lock(); |
a2826aa9 N |
580 | } |
581 | rcu_read_unlock(); | |
855678ed YK |
582 | if (atomic_dec_and_test(&mddev->flush_pending)) { |
583 | /* The pair is percpu_ref_get() from md_flush_request() */ | |
584 | percpu_ref_put(&mddev->active_io); | |
585 | ||
4bc034d3 | 586 | queue_work(md_wq, &mddev->flush_work); |
855678ed | 587 | } |
4bc034d3 | 588 | } |
a2826aa9 | 589 | |
4bc034d3 N |
590 | static void md_submit_flush_data(struct work_struct *ws) |
591 | { | |
592 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); | |
593 | struct bio *bio = mddev->flush_bio; | |
594 | ||
595 | /* | |
596 | * must reset flush_bio before calling into md_handle_request to avoid a | |
597 | * deadlock, because other bios passed md_handle_request suspend check | |
598 | * could wait for this and below md_handle_request could wait for those | |
599 | * bios because of suspend check | |
600 | */ | |
dc5d17a3 | 601 | spin_lock_irq(&mddev->lock); |
81ba3c24 | 602 | mddev->prev_flush_start = mddev->start_flush; |
4bc034d3 | 603 | mddev->flush_bio = NULL; |
dc5d17a3 | 604 | spin_unlock_irq(&mddev->lock); |
4bc034d3 N |
605 | wake_up(&mddev->sb_wait); |
606 | ||
607 | if (bio->bi_iter.bi_size == 0) { | |
608 | /* an empty barrier - all done */ | |
609 | bio_endio(bio); | |
610 | } else { | |
611 | bio->bi_opf &= ~REQ_PREFLUSH; | |
612 | md_handle_request(mddev, bio); | |
a2826aa9 | 613 | } |
a2826aa9 | 614 | } |
4bc034d3 | 615 | |
775d7831 DJ |
616 | /* |
617 | * Manages consolidation of flushes and submitting any flushes needed for | |
618 | * a bio with REQ_PREFLUSH. Returns true if the bio is finished or is | |
619 | * being finished in another context. Returns false if the flushing is | |
620 | * complete but still needs the I/O portion of the bio to be processed. | |
621 | */ | |
622 | bool md_flush_request(struct mddev *mddev, struct bio *bio) | |
4bc034d3 | 623 | { |
81ba3c24 | 624 | ktime_t req_start = ktime_get_boottime(); |
4bc034d3 | 625 | spin_lock_irq(&mddev->lock); |
204d1a64 PG |
626 | /* flush requests wait until ongoing flush completes, |
627 | * hence coalescing all the pending requests. | |
628 | */ | |
4bc034d3 | 629 | wait_event_lock_irq(mddev->sb_wait, |
2bc13b83 | 630 | !mddev->flush_bio || |
a23f2aae | 631 | ktime_before(req_start, mddev->prev_flush_start), |
4bc034d3 | 632 | mddev->lock); |
204d1a64 | 633 | /* new request after previous flush is completed */ |
a23f2aae | 634 | if (ktime_after(req_start, mddev->prev_flush_start)) { |
2bc13b83 | 635 | WARN_ON(mddev->flush_bio); |
fa2bbff7 YK |
636 | /* |
637 | * Grab a reference to make sure mddev_suspend() will wait for | |
638 | * this flush to be done. | |
639 | * | |
640 | * md_flush_reqeust() is called under md_handle_request() and | |
641 | * 'active_io' is already grabbed, hence percpu_ref_is_zero() | |
642 | * won't pass, percpu_ref_tryget_live() can't be used because | |
643 | * percpu_ref_kill() can be called by mddev_suspend() | |
644 | * concurrently. | |
645 | */ | |
646 | WARN_ON(percpu_ref_is_zero(&mddev->active_io)); | |
647 | percpu_ref_get(&mddev->active_io); | |
2bc13b83 N |
648 | mddev->flush_bio = bio; |
649 | bio = NULL; | |
650 | } | |
4bc034d3 N |
651 | spin_unlock_irq(&mddev->lock); |
652 | ||
2bc13b83 N |
653 | if (!bio) { |
654 | INIT_WORK(&mddev->flush_work, submit_flushes); | |
655 | queue_work(md_wq, &mddev->flush_work); | |
656 | } else { | |
657 | /* flush was performed for some other bio while we waited. */ | |
658 | if (bio->bi_iter.bi_size == 0) | |
659 | /* an empty barrier - all done */ | |
660 | bio_endio(bio); | |
661 | else { | |
662 | bio->bi_opf &= ~REQ_PREFLUSH; | |
775d7831 | 663 | return false; |
2bc13b83 N |
664 | } |
665 | } | |
775d7831 | 666 | return true; |
4bc034d3 | 667 | } |
e9c7469b | 668 | EXPORT_SYMBOL(md_flush_request); |
409c57f3 | 669 | |
fd01b88c | 670 | static inline struct mddev *mddev_get(struct mddev *mddev) |
1da177e4 | 671 | { |
12a6caf2 CH |
672 | lockdep_assert_held(&all_mddevs_lock); |
673 | ||
674 | if (test_bit(MD_DELETED, &mddev->flags)) | |
675 | return NULL; | |
1da177e4 LT |
676 | atomic_inc(&mddev->active); |
677 | return mddev; | |
678 | } | |
679 | ||
5fd3a17e | 680 | static void mddev_delayed_delete(struct work_struct *ws); |
d3374825 | 681 | |
3d8d3287 YK |
682 | static void __mddev_put(struct mddev *mddev) |
683 | { | |
684 | if (mddev->raid_disks || !list_empty(&mddev->disks) || | |
685 | mddev->ctime || mddev->hold_active) | |
686 | return; | |
687 | ||
688 | /* Array is not configured at all, and not held active, so destroy it */ | |
689 | set_bit(MD_DELETED, &mddev->flags); | |
690 | ||
691 | /* | |
692 | * Call queue_work inside the spinlock so that flush_workqueue() after | |
693 | * mddev_find will succeed in waiting for the work to be done. | |
694 | */ | |
695 | queue_work(md_misc_wq, &mddev->del_work); | |
696 | } | |
697 | ||
34cb92c0 | 698 | void mddev_put(struct mddev *mddev) |
1da177e4 LT |
699 | { |
700 | if (!atomic_dec_and_lock(&mddev->active, &all_mddevs_lock)) | |
701 | return; | |
28dec870 | 702 | |
3d8d3287 | 703 | __mddev_put(mddev); |
d3374825 | 704 | spin_unlock(&all_mddevs_lock); |
1da177e4 LT |
705 | } |
706 | ||
8376d3c1 | 707 | static void md_safemode_timeout(struct timer_list *t); |
ac619781 | 708 | static void md_start_sync(struct work_struct *ws); |
25b2edfa | 709 | |
d58eff83 | 710 | static void active_io_release(struct percpu_ref *ref) |
fafd7fb0 | 711 | { |
d58eff83 YK |
712 | struct mddev *mddev = container_of(ref, struct mddev, active_io); |
713 | ||
714 | wake_up(&mddev->sb_wait); | |
715 | } | |
716 | ||
b8494823 YK |
717 | static void no_op(struct percpu_ref *r) {} |
718 | ||
d58eff83 YK |
719 | int mddev_init(struct mddev *mddev) |
720 | { | |
721 | ||
722 | if (percpu_ref_init(&mddev->active_io, active_io_release, | |
723 | PERCPU_REF_ALLOW_REINIT, GFP_KERNEL)) | |
724 | return -ENOMEM; | |
725 | ||
b8494823 YK |
726 | if (percpu_ref_init(&mddev->writes_pending, no_op, |
727 | PERCPU_REF_ALLOW_REINIT, GFP_KERNEL)) { | |
728 | percpu_ref_exit(&mddev->active_io); | |
729 | return -ENOMEM; | |
730 | } | |
731 | ||
732 | /* We want to start with the refcount at zero */ | |
733 | percpu_ref_put(&mddev->writes_pending); | |
734 | ||
fafd7fb0 N |
735 | mutex_init(&mddev->open_mutex); |
736 | mutex_init(&mddev->reconfig_mutex); | |
6f56f0c4 | 737 | mutex_init(&mddev->sync_mutex); |
714d2015 | 738 | mutex_init(&mddev->suspend_mutex); |
fafd7fb0 N |
739 | mutex_init(&mddev->bitmap_info.mutex); |
740 | INIT_LIST_HEAD(&mddev->disks); | |
741 | INIT_LIST_HEAD(&mddev->all_mddevs); | |
3ce94ce5 | 742 | INIT_LIST_HEAD(&mddev->deleting); |
8376d3c1 | 743 | timer_setup(&mddev->safemode_timer, md_safemode_timeout, 0); |
fafd7fb0 N |
744 | atomic_set(&mddev->active, 1); |
745 | atomic_set(&mddev->openers, 0); | |
130443d6 | 746 | atomic_set(&mddev->sync_seq, 0); |
85572d7c | 747 | spin_lock_init(&mddev->lock); |
4bc034d3 | 748 | atomic_set(&mddev->flush_pending, 0); |
fafd7fb0 N |
749 | init_waitqueue_head(&mddev->sb_wait); |
750 | init_waitqueue_head(&mddev->recovery_wait); | |
751 | mddev->reshape_position = MaxSector; | |
2c810cdd | 752 | mddev->reshape_backwards = 0; |
c4a39551 | 753 | mddev->last_sync_action = "none"; |
fafd7fb0 N |
754 | mddev->resync_min = 0; |
755 | mddev->resync_max = MaxSector; | |
756 | mddev->level = LEVEL_NONE; | |
ac619781 YK |
757 | |
758 | INIT_WORK(&mddev->sync_work, md_start_sync); | |
759 | INIT_WORK(&mddev->del_work, mddev_delayed_delete); | |
d58eff83 YK |
760 | |
761 | return 0; | |
fafd7fb0 | 762 | } |
390ee602 | 763 | EXPORT_SYMBOL_GPL(mddev_init); |
fafd7fb0 | 764 | |
d58eff83 YK |
765 | void mddev_destroy(struct mddev *mddev) |
766 | { | |
767 | percpu_ref_exit(&mddev->active_io); | |
b8494823 | 768 | percpu_ref_exit(&mddev->writes_pending); |
d58eff83 YK |
769 | } |
770 | EXPORT_SYMBOL_GPL(mddev_destroy); | |
771 | ||
8b57251f CH |
772 | static struct mddev *mddev_find_locked(dev_t unit) |
773 | { | |
774 | struct mddev *mddev; | |
775 | ||
776 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
777 | if (mddev->unit == unit) | |
778 | return mddev; | |
779 | ||
780 | return NULL; | |
781 | } | |
782 | ||
85c8c3c1 CH |
783 | /* find an unused unit number */ |
784 | static dev_t mddev_alloc_unit(void) | |
785 | { | |
786 | static int next_minor = 512; | |
787 | int start = next_minor; | |
788 | bool is_free = 0; | |
789 | dev_t dev = 0; | |
790 | ||
791 | while (!is_free) { | |
792 | dev = MKDEV(MD_MAJOR, next_minor); | |
793 | next_minor++; | |
794 | if (next_minor > MINORMASK) | |
795 | next_minor = 0; | |
796 | if (next_minor == start) | |
797 | return 0; /* Oh dear, all in use. */ | |
798 | is_free = !mddev_find_locked(dev); | |
799 | } | |
800 | ||
801 | return dev; | |
802 | } | |
803 | ||
0d809b38 | 804 | static struct mddev *mddev_alloc(dev_t unit) |
1da177e4 | 805 | { |
0d809b38 CH |
806 | struct mddev *new; |
807 | int error; | |
1da177e4 | 808 | |
8f5f02c4 | 809 | if (unit && MAJOR(unit) != MD_MAJOR) |
d144fe6f | 810 | unit &= ~((1 << MdpMinorShift) - 1); |
8f5f02c4 | 811 | |
d144fe6f CH |
812 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
813 | if (!new) | |
0d809b38 | 814 | return ERR_PTR(-ENOMEM); |
d58eff83 YK |
815 | |
816 | error = mddev_init(new); | |
817 | if (error) | |
818 | goto out_free_new; | |
efeb53c0 | 819 | |
d144fe6f | 820 | spin_lock(&all_mddevs_lock); |
efeb53c0 | 821 | if (unit) { |
0d809b38 CH |
822 | error = -EEXIST; |
823 | if (mddev_find_locked(unit)) | |
d58eff83 | 824 | goto out_destroy_new; |
d144fe6f CH |
825 | new->unit = unit; |
826 | if (MAJOR(unit) == MD_MAJOR) | |
827 | new->md_minor = MINOR(unit); | |
828 | else | |
829 | new->md_minor = MINOR(unit) >> MdpMinorShift; | |
830 | new->hold_active = UNTIL_IOCTL; | |
831 | } else { | |
0d809b38 | 832 | error = -ENODEV; |
85c8c3c1 | 833 | new->unit = mddev_alloc_unit(); |
d144fe6f | 834 | if (!new->unit) |
d58eff83 | 835 | goto out_destroy_new; |
85c8c3c1 | 836 | new->md_minor = MINOR(new->unit); |
efeb53c0 | 837 | new->hold_active = UNTIL_STOP; |
1da177e4 | 838 | } |
1da177e4 | 839 | |
d144fe6f CH |
840 | list_add(&new->all_mddevs, &all_mddevs); |
841 | spin_unlock(&all_mddevs_lock); | |
842 | return new; | |
d58eff83 YK |
843 | |
844 | out_destroy_new: | |
d144fe6f | 845 | spin_unlock(&all_mddevs_lock); |
d58eff83 YK |
846 | mddev_destroy(new); |
847 | out_free_new: | |
d144fe6f | 848 | kfree(new); |
0d809b38 | 849 | return ERR_PTR(error); |
1da177e4 LT |
850 | } |
851 | ||
c57094a6 CH |
852 | static void mddev_free(struct mddev *mddev) |
853 | { | |
854 | spin_lock(&all_mddevs_lock); | |
855 | list_del(&mddev->all_mddevs); | |
856 | spin_unlock(&all_mddevs_lock); | |
857 | ||
d58eff83 | 858 | mddev_destroy(mddev); |
c57094a6 CH |
859 | kfree(mddev); |
860 | } | |
861 | ||
c32dc040 | 862 | static const struct attribute_group md_redundancy_group; |
b6eb127d | 863 | |
4934b640 | 864 | void mddev_unlock(struct mddev *mddev) |
3ce94ce5 YK |
865 | { |
866 | struct md_rdev *rdev; | |
867 | struct md_rdev *tmp; | |
4934b640 | 868 | LIST_HEAD(delete); |
3ce94ce5 | 869 | |
4934b640 YK |
870 | if (!list_empty(&mddev->deleting)) |
871 | list_splice_init(&mddev->deleting, &delete); | |
3ce94ce5 | 872 | |
a64c876f | 873 | if (mddev->to_remove) { |
b6eb127d N |
874 | /* These cannot be removed under reconfig_mutex as |
875 | * an access to the files will try to take reconfig_mutex | |
876 | * while holding the file unremovable, which leads to | |
877 | * a deadlock. | |
bb4f1e9d N |
878 | * So hold set sysfs_active while the remove in happeing, |
879 | * and anything else which might set ->to_remove or my | |
880 | * otherwise change the sysfs namespace will fail with | |
881 | * -EBUSY if sysfs_active is still set. | |
882 | * We set sysfs_active under reconfig_mutex and elsewhere | |
883 | * test it under the same mutex to ensure its correct value | |
884 | * is seen. | |
b6eb127d | 885 | */ |
c32dc040 | 886 | const struct attribute_group *to_remove = mddev->to_remove; |
a64c876f | 887 | mddev->to_remove = NULL; |
bb4f1e9d | 888 | mddev->sysfs_active = 1; |
b6eb127d N |
889 | mutex_unlock(&mddev->reconfig_mutex); |
890 | ||
00bcb4ac N |
891 | if (mddev->kobj.sd) { |
892 | if (to_remove != &md_redundancy_group) | |
893 | sysfs_remove_group(&mddev->kobj, to_remove); | |
894 | if (mddev->pers == NULL || | |
895 | mddev->pers->sync_request == NULL) { | |
896 | sysfs_remove_group(&mddev->kobj, &md_redundancy_group); | |
897 | if (mddev->sysfs_action) | |
898 | sysfs_put(mddev->sysfs_action); | |
e8efa9b8 JB |
899 | if (mddev->sysfs_completed) |
900 | sysfs_put(mddev->sysfs_completed); | |
901 | if (mddev->sysfs_degraded) | |
902 | sysfs_put(mddev->sysfs_degraded); | |
00bcb4ac | 903 | mddev->sysfs_action = NULL; |
e8efa9b8 JB |
904 | mddev->sysfs_completed = NULL; |
905 | mddev->sysfs_degraded = NULL; | |
00bcb4ac | 906 | } |
a64c876f | 907 | } |
bb4f1e9d | 908 | mddev->sysfs_active = 0; |
b6eb127d N |
909 | } else |
910 | mutex_unlock(&mddev->reconfig_mutex); | |
1da177e4 | 911 | |
7deac114 YK |
912 | md_wakeup_thread(mddev->thread); |
913 | wake_up(&mddev->sb_wait); | |
914 | ||
4934b640 YK |
915 | list_for_each_entry_safe(rdev, tmp, &delete, same_set) { |
916 | list_del_init(&rdev->same_set); | |
917 | kobject_del(&rdev->kobj); | |
918 | export_rdev(rdev, mddev); | |
919 | } | |
1da177e4 | 920 | } |
5c47daf6 | 921 | EXPORT_SYMBOL_GPL(mddev_unlock); |
1da177e4 | 922 | |
57d051dc | 923 | struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr) |
1ca69c4b N |
924 | { |
925 | struct md_rdev *rdev; | |
926 | ||
927 | rdev_for_each_rcu(rdev, mddev) | |
928 | if (rdev->desc_nr == nr) | |
929 | return rdev; | |
930 | ||
931 | return NULL; | |
932 | } | |
57d051dc | 933 | EXPORT_SYMBOL_GPL(md_find_rdev_nr_rcu); |
1ca69c4b N |
934 | |
935 | static struct md_rdev *find_rdev(struct mddev *mddev, dev_t dev) | |
1da177e4 | 936 | { |
3cb03002 | 937 | struct md_rdev *rdev; |
1da177e4 | 938 | |
dafb20fa | 939 | rdev_for_each(rdev, mddev) |
1da177e4 LT |
940 | if (rdev->bdev->bd_dev == dev) |
941 | return rdev; | |
159ec1fc | 942 | |
1da177e4 LT |
943 | return NULL; |
944 | } | |
945 | ||
1532d9e8 | 946 | struct md_rdev *md_find_rdev_rcu(struct mddev *mddev, dev_t dev) |
1ca69c4b N |
947 | { |
948 | struct md_rdev *rdev; | |
949 | ||
950 | rdev_for_each_rcu(rdev, mddev) | |
951 | if (rdev->bdev->bd_dev == dev) | |
952 | return rdev; | |
953 | ||
954 | return NULL; | |
955 | } | |
1532d9e8 | 956 | EXPORT_SYMBOL_GPL(md_find_rdev_rcu); |
1ca69c4b | 957 | |
84fc4b56 | 958 | static struct md_personality *find_pers(int level, char *clevel) |
2604b703 | 959 | { |
84fc4b56 | 960 | struct md_personality *pers; |
d9d166c2 N |
961 | list_for_each_entry(pers, &pers_list, list) { |
962 | if (level != LEVEL_NONE && pers->level == level) | |
2604b703 | 963 | return pers; |
d9d166c2 N |
964 | if (strcmp(pers->name, clevel)==0) |
965 | return pers; | |
966 | } | |
2604b703 N |
967 | return NULL; |
968 | } | |
969 | ||
b73df2d3 | 970 | /* return the offset of the super block in 512byte sectors */ |
3cb03002 | 971 | static inline sector_t calc_dev_sboffset(struct md_rdev *rdev) |
1da177e4 | 972 | { |
0fe80347 | 973 | return MD_NEW_SIZE_SECTORS(bdev_nr_sectors(rdev->bdev)); |
1da177e4 LT |
974 | } |
975 | ||
f72ffdd6 | 976 | static int alloc_disk_sb(struct md_rdev *rdev) |
1da177e4 | 977 | { |
1da177e4 | 978 | rdev->sb_page = alloc_page(GFP_KERNEL); |
7f0f0d87 | 979 | if (!rdev->sb_page) |
ebc24337 | 980 | return -ENOMEM; |
1da177e4 LT |
981 | return 0; |
982 | } | |
983 | ||
545c8795 | 984 | void md_rdev_clear(struct md_rdev *rdev) |
1da177e4 LT |
985 | { |
986 | if (rdev->sb_page) { | |
2d1f3b5d | 987 | put_page(rdev->sb_page); |
1da177e4 LT |
988 | rdev->sb_loaded = 0; |
989 | rdev->sb_page = NULL; | |
0f420358 | 990 | rdev->sb_start = 0; |
dd8ac336 | 991 | rdev->sectors = 0; |
1da177e4 | 992 | } |
2699b672 N |
993 | if (rdev->bb_page) { |
994 | put_page(rdev->bb_page); | |
995 | rdev->bb_page = NULL; | |
996 | } | |
d3b407fb | 997 | badblocks_exit(&rdev->badblocks); |
1da177e4 | 998 | } |
545c8795 | 999 | EXPORT_SYMBOL_GPL(md_rdev_clear); |
1da177e4 | 1000 | |
4246a0b6 | 1001 | static void super_written(struct bio *bio) |
7bfa19f2 | 1002 | { |
3cb03002 | 1003 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 1004 | struct mddev *mddev = rdev->mddev; |
7bfa19f2 | 1005 | |
4e4cbee9 | 1006 | if (bio->bi_status) { |
b3db8a21 GJ |
1007 | pr_err("md: %s gets error=%d\n", __func__, |
1008 | blk_status_to_errno(bio->bi_status)); | |
a9701a30 | 1009 | md_error(mddev, rdev); |
46533ff7 N |
1010 | if (!test_bit(Faulty, &rdev->flags) |
1011 | && (bio->bi_opf & MD_FAILFAST)) { | |
2953079c | 1012 | set_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags); |
46533ff7 N |
1013 | set_bit(LastDev, &rdev->flags); |
1014 | } | |
1015 | } else | |
1016 | clear_bit(LastDev, &rdev->flags); | |
7bfa19f2 | 1017 | |
341097ee MP |
1018 | bio_put(bio); |
1019 | ||
1020 | rdev_dec_pending(rdev, mddev); | |
1021 | ||
a9701a30 N |
1022 | if (atomic_dec_and_test(&mddev->pending_writes)) |
1023 | wake_up(&mddev->sb_wait); | |
7bfa19f2 N |
1024 | } |
1025 | ||
fd01b88c | 1026 | void md_super_write(struct mddev *mddev, struct md_rdev *rdev, |
7bfa19f2 N |
1027 | sector_t sector, int size, struct page *page) |
1028 | { | |
1029 | /* write first size bytes of page to sector of rdev | |
1030 | * Increment mddev->pending_writes before returning | |
1031 | * and decrement it on completion, waking up sb_wait | |
1032 | * if zero is reached. | |
1033 | * If an error occurred, call md_error | |
1034 | */ | |
46533ff7 | 1035 | struct bio *bio; |
46533ff7 | 1036 | |
4b6c1060 HM |
1037 | if (!page) |
1038 | return; | |
1039 | ||
46533ff7 N |
1040 | if (test_bit(Faulty, &rdev->flags)) |
1041 | return; | |
1042 | ||
609be106 | 1043 | bio = bio_alloc_bioset(rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev, |
d6e035aa JB |
1044 | 1, |
1045 | REQ_OP_WRITE | REQ_SYNC | REQ_IDLE | REQ_META | |
1046 | | REQ_PREFLUSH | REQ_FUA, | |
1047 | GFP_NOIO, &mddev->sync_set); | |
7bfa19f2 | 1048 | |
ed3b98c7 SL |
1049 | atomic_inc(&rdev->nr_pending); |
1050 | ||
4f024f37 | 1051 | bio->bi_iter.bi_sector = sector; |
3c383235 | 1052 | __bio_add_page(bio, page, size, 0); |
7bfa19f2 N |
1053 | bio->bi_private = rdev; |
1054 | bio->bi_end_io = super_written; | |
46533ff7 N |
1055 | |
1056 | if (test_bit(MD_FAILFAST_SUPPORTED, &mddev->flags) && | |
1057 | test_bit(FailFast, &rdev->flags) && | |
1058 | !test_bit(LastDev, &rdev->flags)) | |
609be106 | 1059 | bio->bi_opf |= MD_FAILFAST; |
a9701a30 | 1060 | |
7bfa19f2 | 1061 | atomic_inc(&mddev->pending_writes); |
4e49ea4a | 1062 | submit_bio(bio); |
a9701a30 N |
1063 | } |
1064 | ||
46533ff7 | 1065 | int md_super_wait(struct mddev *mddev) |
a9701a30 | 1066 | { |
e9c7469b | 1067 | /* wait for all superblock writes that were scheduled to complete */ |
1967cd56 | 1068 | wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0); |
2953079c | 1069 | if (test_and_clear_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags)) |
46533ff7 N |
1070 | return -EAGAIN; |
1071 | return 0; | |
7bfa19f2 N |
1072 | } |
1073 | ||
3cb03002 | 1074 | int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, |
4ce4c73f | 1075 | struct page *page, blk_opf_t opf, bool metadata_op) |
1da177e4 | 1076 | { |
32637385 CH |
1077 | struct bio bio; |
1078 | struct bio_vec bvec; | |
1079 | ||
74d46992 | 1080 | if (metadata_op && rdev->meta_bdev) |
4ce4c73f | 1081 | bio_init(&bio, rdev->meta_bdev, &bvec, 1, opf); |
74d46992 | 1082 | else |
4ce4c73f | 1083 | bio_init(&bio, rdev->bdev, &bvec, 1, opf); |
49add496 | 1084 | |
ccebd4c4 | 1085 | if (metadata_op) |
32637385 | 1086 | bio.bi_iter.bi_sector = sector + rdev->sb_start; |
1fdd6fc9 N |
1087 | else if (rdev->mddev->reshape_position != MaxSector && |
1088 | (rdev->mddev->reshape_backwards == | |
1089 | (sector >= rdev->mddev->reshape_position))) | |
32637385 | 1090 | bio.bi_iter.bi_sector = sector + rdev->new_data_offset; |
ccebd4c4 | 1091 | else |
32637385 | 1092 | bio.bi_iter.bi_sector = sector + rdev->data_offset; |
3c383235 | 1093 | __bio_add_page(&bio, page, size, 0); |
4e49ea4a | 1094 | |
32637385 | 1095 | submit_bio_wait(&bio); |
1da177e4 | 1096 | |
32637385 | 1097 | return !bio.bi_status; |
1da177e4 | 1098 | } |
a8745db2 | 1099 | EXPORT_SYMBOL_GPL(sync_page_io); |
1da177e4 | 1100 | |
f72ffdd6 | 1101 | static int read_disk_sb(struct md_rdev *rdev, int size) |
1da177e4 | 1102 | { |
1da177e4 LT |
1103 | if (rdev->sb_loaded) |
1104 | return 0; | |
1105 | ||
4ce4c73f | 1106 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, REQ_OP_READ, true)) |
1da177e4 LT |
1107 | goto fail; |
1108 | rdev->sb_loaded = 1; | |
1109 | return 0; | |
1110 | ||
1111 | fail: | |
913cce5a CH |
1112 | pr_err("md: disabled device %pg, could not read superblock.\n", |
1113 | rdev->bdev); | |
1da177e4 LT |
1114 | return -EINVAL; |
1115 | } | |
1116 | ||
e6fd2093 | 1117 | static int md_uuid_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 | 1118 | { |
f72ffdd6 | 1119 | return sb1->set_uuid0 == sb2->set_uuid0 && |
05710466 AN |
1120 | sb1->set_uuid1 == sb2->set_uuid1 && |
1121 | sb1->set_uuid2 == sb2->set_uuid2 && | |
1122 | sb1->set_uuid3 == sb2->set_uuid3; | |
1da177e4 LT |
1123 | } |
1124 | ||
e6fd2093 | 1125 | static int md_sb_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 LT |
1126 | { |
1127 | int ret; | |
1128 | mdp_super_t *tmp1, *tmp2; | |
1129 | ||
1130 | tmp1 = kmalloc(sizeof(*tmp1),GFP_KERNEL); | |
1131 | tmp2 = kmalloc(sizeof(*tmp2),GFP_KERNEL); | |
1132 | ||
1133 | if (!tmp1 || !tmp2) { | |
1134 | ret = 0; | |
1da177e4 LT |
1135 | goto abort; |
1136 | } | |
1137 | ||
1138 | *tmp1 = *sb1; | |
1139 | *tmp2 = *sb2; | |
1140 | ||
1141 | /* | |
1142 | * nr_disks is not constant | |
1143 | */ | |
1144 | tmp1->nr_disks = 0; | |
1145 | tmp2->nr_disks = 0; | |
1146 | ||
ce0c8e05 | 1147 | ret = (memcmp(tmp1, tmp2, MD_SB_GENERIC_CONSTANT_WORDS * 4) == 0); |
1da177e4 | 1148 | abort: |
990a8baf JJ |
1149 | kfree(tmp1); |
1150 | kfree(tmp2); | |
1da177e4 LT |
1151 | return ret; |
1152 | } | |
1153 | ||
4d167f09 N |
1154 | static u32 md_csum_fold(u32 csum) |
1155 | { | |
1156 | csum = (csum & 0xffff) + (csum >> 16); | |
1157 | return (csum & 0xffff) + (csum >> 16); | |
1158 | } | |
1159 | ||
f72ffdd6 | 1160 | static unsigned int calc_sb_csum(mdp_super_t *sb) |
1da177e4 | 1161 | { |
4d167f09 N |
1162 | u64 newcsum = 0; |
1163 | u32 *sb32 = (u32*)sb; | |
1164 | int i; | |
1da177e4 LT |
1165 | unsigned int disk_csum, csum; |
1166 | ||
1167 | disk_csum = sb->sb_csum; | |
1168 | sb->sb_csum = 0; | |
4d167f09 N |
1169 | |
1170 | for (i = 0; i < MD_SB_BYTES/4 ; i++) | |
1171 | newcsum += sb32[i]; | |
1172 | csum = (newcsum & 0xffffffff) + (newcsum>>32); | |
1173 | ||
4d167f09 N |
1174 | #ifdef CONFIG_ALPHA |
1175 | /* This used to use csum_partial, which was wrong for several | |
1176 | * reasons including that different results are returned on | |
1177 | * different architectures. It isn't critical that we get exactly | |
1178 | * the same return value as before (we always csum_fold before | |
1179 | * testing, and that removes any differences). However as we | |
1180 | * know that csum_partial always returned a 16bit value on | |
1181 | * alphas, do a fold to maximise conformity to previous behaviour. | |
1182 | */ | |
1183 | sb->sb_csum = md_csum_fold(disk_csum); | |
1184 | #else | |
1da177e4 | 1185 | sb->sb_csum = disk_csum; |
4d167f09 | 1186 | #endif |
1da177e4 LT |
1187 | return csum; |
1188 | } | |
1189 | ||
1da177e4 LT |
1190 | /* |
1191 | * Handle superblock details. | |
1192 | * We want to be able to handle multiple superblock formats | |
1193 | * so we have a common interface to them all, and an array of | |
1194 | * different handlers. | |
1195 | * We rely on user-space to write the initial superblock, and support | |
1196 | * reading and updating of superblocks. | |
1197 | * Interface methods are: | |
3cb03002 | 1198 | * int load_super(struct md_rdev *dev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1199 | * loads and validates a superblock on dev. |
1200 | * if refdev != NULL, compare superblocks on both devices | |
1201 | * Return: | |
1202 | * 0 - dev has a superblock that is compatible with refdev | |
1203 | * 1 - dev has a superblock that is compatible and newer than refdev | |
1204 | * so dev should be used as the refdev in future | |
1205 | * -EINVAL superblock incompatible or invalid | |
1206 | * -othererror e.g. -EIO | |
1207 | * | |
fd01b88c | 1208 | * int validate_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1209 | * Verify that dev is acceptable into mddev. |
1210 | * The first time, mddev->raid_disks will be 0, and data from | |
1211 | * dev should be merged in. Subsequent calls check that dev | |
1212 | * is new enough. Return 0 or -EINVAL | |
1213 | * | |
fd01b88c | 1214 | * void sync_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1215 | * Update the superblock for rdev with data in mddev |
1216 | * This does not write to disc. | |
1217 | * | |
1218 | */ | |
1219 | ||
1220 | struct super_type { | |
0cd17fec CW |
1221 | char *name; |
1222 | struct module *owner; | |
c6563a8c N |
1223 | int (*load_super)(struct md_rdev *rdev, |
1224 | struct md_rdev *refdev, | |
0cd17fec | 1225 | int minor_version); |
c6563a8c | 1226 | int (*validate_super)(struct mddev *mddev, |
dc1cc22e | 1227 | struct md_rdev *freshest, |
c6563a8c N |
1228 | struct md_rdev *rdev); |
1229 | void (*sync_super)(struct mddev *mddev, | |
1230 | struct md_rdev *rdev); | |
3cb03002 | 1231 | unsigned long long (*rdev_size_change)(struct md_rdev *rdev, |
15f4a5fd | 1232 | sector_t num_sectors); |
c6563a8c N |
1233 | int (*allow_new_offset)(struct md_rdev *rdev, |
1234 | unsigned long long new_offset); | |
1da177e4 LT |
1235 | }; |
1236 | ||
0894cc30 AN |
1237 | /* |
1238 | * Check that the given mddev has no bitmap. | |
1239 | * | |
1240 | * This function is called from the run method of all personalities that do not | |
1241 | * support bitmaps. It prints an error message and returns non-zero if mddev | |
1242 | * has a bitmap. Otherwise, it returns 0. | |
1243 | * | |
1244 | */ | |
fd01b88c | 1245 | int md_check_no_bitmap(struct mddev *mddev) |
0894cc30 | 1246 | { |
c3d9714e | 1247 | if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset) |
0894cc30 | 1248 | return 0; |
9d48739e | 1249 | pr_warn("%s: bitmaps are not supported for %s\n", |
0894cc30 AN |
1250 | mdname(mddev), mddev->pers->name); |
1251 | return 1; | |
1252 | } | |
1253 | EXPORT_SYMBOL(md_check_no_bitmap); | |
1254 | ||
1da177e4 | 1255 | /* |
f72ffdd6 | 1256 | * load_super for 0.90.0 |
1da177e4 | 1257 | */ |
3cb03002 | 1258 | static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 | 1259 | { |
1da177e4 LT |
1260 | mdp_super_t *sb; |
1261 | int ret; | |
228fc7d7 | 1262 | bool spare_disk = true; |
1da177e4 LT |
1263 | |
1264 | /* | |
0f420358 | 1265 | * Calculate the position of the superblock (512byte sectors), |
1da177e4 LT |
1266 | * it's at the end of the disk. |
1267 | * | |
1268 | * It also happens to be a multiple of 4Kb. | |
1269 | */ | |
57b2caa3 | 1270 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 1271 | |
0002b271 | 1272 | ret = read_disk_sb(rdev, MD_SB_BYTES); |
9d48739e N |
1273 | if (ret) |
1274 | return ret; | |
1da177e4 LT |
1275 | |
1276 | ret = -EINVAL; | |
1277 | ||
65a06f06 | 1278 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1279 | |
1280 | if (sb->md_magic != MD_SB_MAGIC) { | |
913cce5a CH |
1281 | pr_warn("md: invalid raid superblock magic on %pg\n", |
1282 | rdev->bdev); | |
1da177e4 LT |
1283 | goto abort; |
1284 | } | |
1285 | ||
1286 | if (sb->major_version != 0 || | |
f6705578 N |
1287 | sb->minor_version < 90 || |
1288 | sb->minor_version > 91) { | |
913cce5a CH |
1289 | pr_warn("Bad version number %d.%d on %pg\n", |
1290 | sb->major_version, sb->minor_version, rdev->bdev); | |
1da177e4 LT |
1291 | goto abort; |
1292 | } | |
1293 | ||
1294 | if (sb->raid_disks <= 0) | |
1295 | goto abort; | |
1296 | ||
4d167f09 | 1297 | if (md_csum_fold(calc_sb_csum(sb)) != md_csum_fold(sb->sb_csum)) { |
913cce5a | 1298 | pr_warn("md: invalid superblock checksum on %pg\n", rdev->bdev); |
1da177e4 LT |
1299 | goto abort; |
1300 | } | |
1301 | ||
1302 | rdev->preferred_minor = sb->md_minor; | |
1303 | rdev->data_offset = 0; | |
c6563a8c | 1304 | rdev->new_data_offset = 0; |
0002b271 | 1305 | rdev->sb_size = MD_SB_BYTES; |
9f2f3830 | 1306 | rdev->badblocks.shift = -1; |
1da177e4 | 1307 | |
d8730f0c SL |
1308 | rdev->desc_nr = sb->this_disk.number; |
1309 | ||
1310 | /* not spare disk */ | |
1311 | if (rdev->desc_nr >= 0 && rdev->desc_nr < MD_SB_DISKS && | |
1312 | sb->disks[rdev->desc_nr].state & ((1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE))) | |
228fc7d7 YY |
1313 | spare_disk = false; |
1314 | ||
9a7b2b0f | 1315 | if (!refdev) { |
228fc7d7 | 1316 | if (!spare_disk) |
6a5cb53a YY |
1317 | ret = 1; |
1318 | else | |
1319 | ret = 0; | |
9a7b2b0f | 1320 | } else { |
1da177e4 | 1321 | __u64 ev1, ev2; |
65a06f06 | 1322 | mdp_super_t *refsb = page_address(refdev->sb_page); |
e6fd2093 | 1323 | if (!md_uuid_equal(refsb, sb)) { |
913cce5a CH |
1324 | pr_warn("md: %pg has different UUID to %pg\n", |
1325 | rdev->bdev, refdev->bdev); | |
1da177e4 LT |
1326 | goto abort; |
1327 | } | |
e6fd2093 | 1328 | if (!md_sb_equal(refsb, sb)) { |
913cce5a CH |
1329 | pr_warn("md: %pg has same UUID but different superblock to %pg\n", |
1330 | rdev->bdev, refdev->bdev); | |
1da177e4 LT |
1331 | goto abort; |
1332 | } | |
1333 | ev1 = md_event(sb); | |
1334 | ev2 = md_event(refsb); | |
6a5cb53a | 1335 | |
228fc7d7 | 1336 | if (!spare_disk && ev1 > ev2) |
1da177e4 | 1337 | ret = 1; |
f72ffdd6 | 1338 | else |
1da177e4 LT |
1339 | ret = 0; |
1340 | } | |
8190e754 | 1341 | rdev->sectors = rdev->sb_start; |
667a5313 N |
1342 | /* Limit to 4TB as metadata cannot record more than that. |
1343 | * (not needed for Linear and RAID0 as metadata doesn't | |
1344 | * record this size) | |
1345 | */ | |
72deb455 | 1346 | if ((u64)rdev->sectors >= (2ULL << 32) && sb->level >= 1) |
3312c951 | 1347 | rdev->sectors = (sector_t)(2ULL << 32) - 2; |
1da177e4 | 1348 | |
27a7b260 | 1349 | if (rdev->sectors < ((sector_t)sb->size) * 2 && sb->level >= 1) |
2bf071bf N |
1350 | /* "this cannot possibly happen" ... */ |
1351 | ret = -EINVAL; | |
1352 | ||
1da177e4 LT |
1353 | abort: |
1354 | return ret; | |
1355 | } | |
1356 | ||
1357 | /* | |
1358 | * validate_super for 0.90.0 | |
dc1cc22e | 1359 | * note: we are not using "freshest" for 0.9 superblock |
1da177e4 | 1360 | */ |
dc1cc22e | 1361 | static int super_90_validate(struct mddev *mddev, struct md_rdev *freshest, struct md_rdev *rdev) |
1da177e4 LT |
1362 | { |
1363 | mdp_disk_t *desc; | |
65a06f06 | 1364 | mdp_super_t *sb = page_address(rdev->sb_page); |
07d84d10 | 1365 | __u64 ev1 = md_event(sb); |
1da177e4 | 1366 | |
41158c7e | 1367 | rdev->raid_disk = -1; |
c5d79adb N |
1368 | clear_bit(Faulty, &rdev->flags); |
1369 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1370 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1371 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1372 | |
1da177e4 LT |
1373 | if (mddev->raid_disks == 0) { |
1374 | mddev->major_version = 0; | |
1375 | mddev->minor_version = sb->minor_version; | |
1376 | mddev->patch_version = sb->patch_version; | |
e691063a | 1377 | mddev->external = 0; |
9d8f0363 | 1378 | mddev->chunk_sectors = sb->chunk_size >> 9; |
1da177e4 LT |
1379 | mddev->ctime = sb->ctime; |
1380 | mddev->utime = sb->utime; | |
1381 | mddev->level = sb->level; | |
d9d166c2 | 1382 | mddev->clevel[0] = 0; |
1da177e4 LT |
1383 | mddev->layout = sb->layout; |
1384 | mddev->raid_disks = sb->raid_disks; | |
27a7b260 | 1385 | mddev->dev_sectors = ((sector_t)sb->size) * 2; |
07d84d10 | 1386 | mddev->events = ev1; |
c3d9714e | 1387 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1388 | mddev->bitmap_info.space = 0; |
1389 | /* bitmap can use 60 K after the 4K superblocks */ | |
c3d9714e | 1390 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 1391 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
2c810cdd | 1392 | mddev->reshape_backwards = 0; |
1da177e4 | 1393 | |
f6705578 N |
1394 | if (mddev->minor_version >= 91) { |
1395 | mddev->reshape_position = sb->reshape_position; | |
1396 | mddev->delta_disks = sb->delta_disks; | |
1397 | mddev->new_level = sb->new_level; | |
1398 | mddev->new_layout = sb->new_layout; | |
664e7c41 | 1399 | mddev->new_chunk_sectors = sb->new_chunk >> 9; |
2c810cdd N |
1400 | if (mddev->delta_disks < 0) |
1401 | mddev->reshape_backwards = 1; | |
f6705578 N |
1402 | } else { |
1403 | mddev->reshape_position = MaxSector; | |
1404 | mddev->delta_disks = 0; | |
1405 | mddev->new_level = mddev->level; | |
1406 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1407 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 | 1408 | } |
33f2c35a N |
1409 | if (mddev->level == 0) |
1410 | mddev->layout = -1; | |
f6705578 | 1411 | |
1da177e4 LT |
1412 | if (sb->state & (1<<MD_SB_CLEAN)) |
1413 | mddev->recovery_cp = MaxSector; | |
1414 | else { | |
f72ffdd6 | 1415 | if (sb->events_hi == sb->cp_events_hi && |
1da177e4 LT |
1416 | sb->events_lo == sb->cp_events_lo) { |
1417 | mddev->recovery_cp = sb->recovery_cp; | |
1418 | } else | |
1419 | mddev->recovery_cp = 0; | |
1420 | } | |
1421 | ||
1422 | memcpy(mddev->uuid+0, &sb->set_uuid0, 4); | |
1423 | memcpy(mddev->uuid+4, &sb->set_uuid1, 4); | |
1424 | memcpy(mddev->uuid+8, &sb->set_uuid2, 4); | |
1425 | memcpy(mddev->uuid+12,&sb->set_uuid3, 4); | |
1426 | ||
1427 | mddev->max_disks = MD_SB_DISKS; | |
a654b9d8 N |
1428 | |
1429 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT) && | |
6409bb05 | 1430 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1431 | mddev->bitmap_info.offset = |
1432 | mddev->bitmap_info.default_offset; | |
6409bb05 | 1433 | mddev->bitmap_info.space = |
c9ad020f | 1434 | mddev->bitmap_info.default_space; |
6409bb05 | 1435 | } |
a654b9d8 | 1436 | |
41158c7e | 1437 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1438 | /* Insist on good event counter while assembling, except |
1439 | * for spares (which don't need an event count) */ | |
1da177e4 | 1440 | ++ev1; |
be6800a7 N |
1441 | if (sb->disks[rdev->desc_nr].state & ( |
1442 | (1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE))) | |
f72ffdd6 | 1443 | if (ev1 < mddev->events) |
be6800a7 | 1444 | return -EINVAL; |
41158c7e N |
1445 | } else if (mddev->bitmap) { |
1446 | /* if adding to array with a bitmap, then we can accept an | |
1447 | * older device ... but not too old. | |
1448 | */ | |
41158c7e N |
1449 | if (ev1 < mddev->bitmap->events_cleared) |
1450 | return 0; | |
8313b8e5 N |
1451 | if (ev1 < mddev->events) |
1452 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1453 | } else { |
1454 | if (ev1 < mddev->events) | |
1455 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1456 | return 0; | |
1457 | } | |
41158c7e | 1458 | |
d8730f0c | 1459 | desc = sb->disks + rdev->desc_nr; |
1da177e4 | 1460 | |
d8730f0c SL |
1461 | if (desc->state & (1<<MD_DISK_FAULTY)) |
1462 | set_bit(Faulty, &rdev->flags); | |
1463 | else if (desc->state & (1<<MD_DISK_SYNC)) { | |
1464 | set_bit(In_sync, &rdev->flags); | |
1465 | rdev->raid_disk = desc->raid_disk; | |
1466 | rdev->saved_raid_disk = desc->raid_disk; | |
1467 | } else if (desc->state & (1<<MD_DISK_ACTIVE)) { | |
1468 | /* active but not in sync implies recovery up to | |
1469 | * reshape position. We don't know exactly where | |
1470 | * that is, so set to zero for now | |
1471 | */ | |
1472 | if (mddev->minor_version >= 91) { | |
1473 | rdev->recovery_offset = 0; | |
1da177e4 LT |
1474 | rdev->raid_disk = desc->raid_disk; |
1475 | } | |
d8730f0c SL |
1476 | } |
1477 | if (desc->state & (1<<MD_DISK_WRITEMOSTLY)) | |
1478 | set_bit(WriteMostly, &rdev->flags); | |
1479 | if (desc->state & (1<<MD_DISK_FAILFAST)) | |
1480 | set_bit(FailFast, &rdev->flags); | |
1da177e4 LT |
1481 | return 0; |
1482 | } | |
1483 | ||
1484 | /* | |
1485 | * sync_super for 0.90.0 | |
1486 | */ | |
fd01b88c | 1487 | static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1488 | { |
1489 | mdp_super_t *sb; | |
3cb03002 | 1490 | struct md_rdev *rdev2; |
1da177e4 | 1491 | int next_spare = mddev->raid_disks; |
19133a42 | 1492 | |
1da177e4 LT |
1493 | /* make rdev->sb match mddev data.. |
1494 | * | |
1495 | * 1/ zero out disks | |
1496 | * 2/ Add info for each disk, keeping track of highest desc_nr (next_spare); | |
1497 | * 3/ any empty disks < next_spare become removed | |
1498 | * | |
1499 | * disks[0] gets initialised to REMOVED because | |
1500 | * we cannot be sure from other fields if it has | |
1501 | * been initialised or not. | |
1502 | */ | |
1503 | int i; | |
1504 | int active=0, working=0,failed=0,spare=0,nr_disks=0; | |
1505 | ||
61181565 N |
1506 | rdev->sb_size = MD_SB_BYTES; |
1507 | ||
65a06f06 | 1508 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1509 | |
1510 | memset(sb, 0, sizeof(*sb)); | |
1511 | ||
1512 | sb->md_magic = MD_SB_MAGIC; | |
1513 | sb->major_version = mddev->major_version; | |
1da177e4 LT |
1514 | sb->patch_version = mddev->patch_version; |
1515 | sb->gvalid_words = 0; /* ignored */ | |
1516 | memcpy(&sb->set_uuid0, mddev->uuid+0, 4); | |
1517 | memcpy(&sb->set_uuid1, mddev->uuid+4, 4); | |
1518 | memcpy(&sb->set_uuid2, mddev->uuid+8, 4); | |
1519 | memcpy(&sb->set_uuid3, mddev->uuid+12,4); | |
1520 | ||
9ebc6ef1 | 1521 | sb->ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 1522 | sb->level = mddev->level; |
58c0fed4 | 1523 | sb->size = mddev->dev_sectors / 2; |
1da177e4 LT |
1524 | sb->raid_disks = mddev->raid_disks; |
1525 | sb->md_minor = mddev->md_minor; | |
e691063a | 1526 | sb->not_persistent = 0; |
9ebc6ef1 | 1527 | sb->utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
1528 | sb->state = 0; |
1529 | sb->events_hi = (mddev->events>>32); | |
1530 | sb->events_lo = (u32)mddev->events; | |
1531 | ||
f6705578 N |
1532 | if (mddev->reshape_position == MaxSector) |
1533 | sb->minor_version = 90; | |
1534 | else { | |
1535 | sb->minor_version = 91; | |
1536 | sb->reshape_position = mddev->reshape_position; | |
1537 | sb->new_level = mddev->new_level; | |
1538 | sb->delta_disks = mddev->delta_disks; | |
1539 | sb->new_layout = mddev->new_layout; | |
664e7c41 | 1540 | sb->new_chunk = mddev->new_chunk_sectors << 9; |
f6705578 N |
1541 | } |
1542 | mddev->minor_version = sb->minor_version; | |
1da177e4 LT |
1543 | if (mddev->in_sync) |
1544 | { | |
1545 | sb->recovery_cp = mddev->recovery_cp; | |
1546 | sb->cp_events_hi = (mddev->events>>32); | |
1547 | sb->cp_events_lo = (u32)mddev->events; | |
1548 | if (mddev->recovery_cp == MaxSector) | |
1549 | sb->state = (1<< MD_SB_CLEAN); | |
1550 | } else | |
1551 | sb->recovery_cp = 0; | |
1552 | ||
1553 | sb->layout = mddev->layout; | |
9d8f0363 | 1554 | sb->chunk_size = mddev->chunk_sectors << 9; |
1da177e4 | 1555 | |
c3d9714e | 1556 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) |
a654b9d8 N |
1557 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); |
1558 | ||
1da177e4 | 1559 | sb->disks[0].state = (1<<MD_DISK_REMOVED); |
dafb20fa | 1560 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1561 | mdp_disk_t *d; |
86e6ffdd | 1562 | int desc_nr; |
0261cd9f N |
1563 | int is_active = test_bit(In_sync, &rdev2->flags); |
1564 | ||
1565 | if (rdev2->raid_disk >= 0 && | |
1566 | sb->minor_version >= 91) | |
1567 | /* we have nowhere to store the recovery_offset, | |
1568 | * but if it is not below the reshape_position, | |
1569 | * we can piggy-back on that. | |
1570 | */ | |
1571 | is_active = 1; | |
1572 | if (rdev2->raid_disk < 0 || | |
1573 | test_bit(Faulty, &rdev2->flags)) | |
1574 | is_active = 0; | |
1575 | if (is_active) | |
86e6ffdd | 1576 | desc_nr = rdev2->raid_disk; |
1da177e4 | 1577 | else |
86e6ffdd | 1578 | desc_nr = next_spare++; |
19133a42 | 1579 | rdev2->desc_nr = desc_nr; |
1da177e4 LT |
1580 | d = &sb->disks[rdev2->desc_nr]; |
1581 | nr_disks++; | |
1582 | d->number = rdev2->desc_nr; | |
1583 | d->major = MAJOR(rdev2->bdev->bd_dev); | |
1584 | d->minor = MINOR(rdev2->bdev->bd_dev); | |
0261cd9f | 1585 | if (is_active) |
1da177e4 LT |
1586 | d->raid_disk = rdev2->raid_disk; |
1587 | else | |
1588 | d->raid_disk = rdev2->desc_nr; /* compatibility */ | |
1be7892f | 1589 | if (test_bit(Faulty, &rdev2->flags)) |
1da177e4 | 1590 | d->state = (1<<MD_DISK_FAULTY); |
0261cd9f | 1591 | else if (is_active) { |
1da177e4 | 1592 | d->state = (1<<MD_DISK_ACTIVE); |
0261cd9f N |
1593 | if (test_bit(In_sync, &rdev2->flags)) |
1594 | d->state |= (1<<MD_DISK_SYNC); | |
1da177e4 LT |
1595 | active++; |
1596 | working++; | |
1597 | } else { | |
1598 | d->state = 0; | |
1599 | spare++; | |
1600 | working++; | |
1601 | } | |
8ddf9efe N |
1602 | if (test_bit(WriteMostly, &rdev2->flags)) |
1603 | d->state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
1604 | if (test_bit(FailFast, &rdev2->flags)) |
1605 | d->state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 | 1606 | } |
1da177e4 LT |
1607 | /* now set the "removed" and "faulty" bits on any missing devices */ |
1608 | for (i=0 ; i < mddev->raid_disks ; i++) { | |
1609 | mdp_disk_t *d = &sb->disks[i]; | |
1610 | if (d->state == 0 && d->number == 0) { | |
1611 | d->number = i; | |
1612 | d->raid_disk = i; | |
1613 | d->state = (1<<MD_DISK_REMOVED); | |
1614 | d->state |= (1<<MD_DISK_FAULTY); | |
1615 | failed++; | |
1616 | } | |
1617 | } | |
1618 | sb->nr_disks = nr_disks; | |
1619 | sb->active_disks = active; | |
1620 | sb->working_disks = working; | |
1621 | sb->failed_disks = failed; | |
1622 | sb->spare_disks = spare; | |
1623 | ||
1624 | sb->this_disk = sb->disks[rdev->desc_nr]; | |
1625 | sb->sb_csum = calc_sb_csum(sb); | |
1626 | } | |
1627 | ||
0cd17fec CW |
1628 | /* |
1629 | * rdev_size_change for 0.90.0 | |
1630 | */ | |
1631 | static unsigned long long | |
3cb03002 | 1632 | super_90_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec | 1633 | { |
58c0fed4 | 1634 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1635 | return 0; /* component must fit device */ |
c3d9714e | 1636 | if (rdev->mddev->bitmap_info.offset) |
0cd17fec | 1637 | return 0; /* can't move bitmap */ |
57b2caa3 | 1638 | rdev->sb_start = calc_dev_sboffset(rdev); |
15f4a5fd AN |
1639 | if (!num_sectors || num_sectors > rdev->sb_start) |
1640 | num_sectors = rdev->sb_start; | |
27a7b260 N |
1641 | /* Limit to 4TB as metadata cannot record more than that. |
1642 | * 4TB == 2^32 KB, or 2*2^32 sectors. | |
1643 | */ | |
72deb455 | 1644 | if ((u64)num_sectors >= (2ULL << 32) && rdev->mddev->level >= 1) |
3312c951 | 1645 | num_sectors = (sector_t)(2ULL << 32) - 2; |
46533ff7 N |
1646 | do { |
1647 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
0cd17fec | 1648 | rdev->sb_page); |
46533ff7 | 1649 | } while (md_super_wait(rdev->mddev) < 0); |
c26a44ed | 1650 | return num_sectors; |
0cd17fec CW |
1651 | } |
1652 | ||
c6563a8c N |
1653 | static int |
1654 | super_90_allow_new_offset(struct md_rdev *rdev, unsigned long long new_offset) | |
1655 | { | |
1656 | /* non-zero offset changes not possible with v0.90 */ | |
1657 | return new_offset == 0; | |
1658 | } | |
0cd17fec | 1659 | |
1da177e4 LT |
1660 | /* |
1661 | * version 1 superblock | |
1662 | */ | |
1663 | ||
f72ffdd6 | 1664 | static __le32 calc_sb_1_csum(struct mdp_superblock_1 *sb) |
1da177e4 | 1665 | { |
1c05b4bc N |
1666 | __le32 disk_csum; |
1667 | u32 csum; | |
1da177e4 LT |
1668 | unsigned long long newcsum; |
1669 | int size = 256 + le32_to_cpu(sb->max_dev)*2; | |
1c05b4bc | 1670 | __le32 *isuper = (__le32*)sb; |
1da177e4 LT |
1671 | |
1672 | disk_csum = sb->sb_csum; | |
1673 | sb->sb_csum = 0; | |
1674 | newcsum = 0; | |
1f3c9907 | 1675 | for (; size >= 4; size -= 4) |
1da177e4 LT |
1676 | newcsum += le32_to_cpu(*isuper++); |
1677 | ||
1678 | if (size == 2) | |
1c05b4bc | 1679 | newcsum += le16_to_cpu(*(__le16*) isuper); |
1da177e4 LT |
1680 | |
1681 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
1682 | sb->sb_csum = disk_csum; | |
1683 | return cpu_to_le32(csum); | |
1684 | } | |
1685 | ||
3cb03002 | 1686 | static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1687 | { |
1688 | struct mdp_superblock_1 *sb; | |
1689 | int ret; | |
0f420358 | 1690 | sector_t sb_start; |
c6563a8c | 1691 | sector_t sectors; |
0002b271 | 1692 | int bmask; |
228fc7d7 | 1693 | bool spare_disk = true; |
1da177e4 LT |
1694 | |
1695 | /* | |
0f420358 | 1696 | * Calculate the position of the superblock in 512byte sectors. |
1da177e4 LT |
1697 | * It is always aligned to a 4K boundary and |
1698 | * depeding on minor_version, it can be: | |
1699 | * 0: At least 8K, but less than 12K, from end of device | |
1700 | * 1: At start of device | |
1701 | * 2: 4K from start of device. | |
1702 | */ | |
1703 | switch(minor_version) { | |
1704 | case 0: | |
0fe80347 | 1705 | sb_start = bdev_nr_sectors(rdev->bdev) - 8 * 2; |
0f420358 | 1706 | sb_start &= ~(sector_t)(4*2-1); |
1da177e4 LT |
1707 | break; |
1708 | case 1: | |
0f420358 | 1709 | sb_start = 0; |
1da177e4 LT |
1710 | break; |
1711 | case 2: | |
0f420358 | 1712 | sb_start = 8; |
1da177e4 LT |
1713 | break; |
1714 | default: | |
1715 | return -EINVAL; | |
1716 | } | |
0f420358 | 1717 | rdev->sb_start = sb_start; |
1da177e4 | 1718 | |
0002b271 N |
1719 | /* superblock is rarely larger than 1K, but it can be larger, |
1720 | * and it is safe to read 4k, so we do that | |
1721 | */ | |
1722 | ret = read_disk_sb(rdev, 4096); | |
1da177e4 LT |
1723 | if (ret) return ret; |
1724 | ||
65a06f06 | 1725 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1726 | |
1727 | if (sb->magic != cpu_to_le32(MD_SB_MAGIC) || | |
1728 | sb->major_version != cpu_to_le32(1) || | |
1729 | le32_to_cpu(sb->max_dev) > (4096-256)/2 || | |
0f420358 | 1730 | le64_to_cpu(sb->super_offset) != rdev->sb_start || |
71c0805c | 1731 | (le32_to_cpu(sb->feature_map) & ~MD_FEATURE_ALL) != 0) |
1da177e4 LT |
1732 | return -EINVAL; |
1733 | ||
1734 | if (calc_sb_1_csum(sb) != sb->sb_csum) { | |
913cce5a CH |
1735 | pr_warn("md: invalid superblock checksum on %pg\n", |
1736 | rdev->bdev); | |
1da177e4 LT |
1737 | return -EINVAL; |
1738 | } | |
1739 | if (le64_to_cpu(sb->data_size) < 10) { | |
913cce5a CH |
1740 | pr_warn("md: data_size too small on %pg\n", |
1741 | rdev->bdev); | |
1da177e4 LT |
1742 | return -EINVAL; |
1743 | } | |
c6563a8c N |
1744 | if (sb->pad0 || |
1745 | sb->pad3[0] || | |
1746 | memcmp(sb->pad3, sb->pad3+1, sizeof(sb->pad3) - sizeof(sb->pad3[1]))) | |
1747 | /* Some padding is non-zero, might be a new feature */ | |
1748 | return -EINVAL; | |
e11e93fa | 1749 | |
1da177e4 LT |
1750 | rdev->preferred_minor = 0xffff; |
1751 | rdev->data_offset = le64_to_cpu(sb->data_offset); | |
c6563a8c N |
1752 | rdev->new_data_offset = rdev->data_offset; |
1753 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE) && | |
1754 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) | |
1755 | rdev->new_data_offset += (s32)le32_to_cpu(sb->new_offset); | |
4dbcdc75 | 1756 | atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read)); |
1da177e4 | 1757 | |
0002b271 | 1758 | rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256; |
e1defc4f | 1759 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; |
0002b271 | 1760 | if (rdev->sb_size & bmask) |
a1801f85 N |
1761 | rdev->sb_size = (rdev->sb_size | bmask) + 1; |
1762 | ||
1763 | if (minor_version | |
0f420358 | 1764 | && rdev->data_offset < sb_start + (rdev->sb_size/512)) |
a1801f85 | 1765 | return -EINVAL; |
c6563a8c N |
1766 | if (minor_version |
1767 | && rdev->new_data_offset < sb_start + (rdev->sb_size/512)) | |
1768 | return -EINVAL; | |
0002b271 | 1769 | |
d8730f0c | 1770 | rdev->desc_nr = le32_to_cpu(sb->dev_number); |
31b65a0d | 1771 | |
2699b672 N |
1772 | if (!rdev->bb_page) { |
1773 | rdev->bb_page = alloc_page(GFP_KERNEL); | |
1774 | if (!rdev->bb_page) | |
1775 | return -ENOMEM; | |
1776 | } | |
1777 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BAD_BLOCKS) && | |
1778 | rdev->badblocks.count == 0) { | |
1779 | /* need to load the bad block list. | |
1780 | * Currently we limit it to one page. | |
1781 | */ | |
1782 | s32 offset; | |
1783 | sector_t bb_sector; | |
00485d09 | 1784 | __le64 *bbp; |
2699b672 N |
1785 | int i; |
1786 | int sectors = le16_to_cpu(sb->bblog_size); | |
1787 | if (sectors > (PAGE_SIZE / 512)) | |
1788 | return -EINVAL; | |
1789 | offset = le32_to_cpu(sb->bblog_offset); | |
1790 | if (offset == 0) | |
1791 | return -EINVAL; | |
1792 | bb_sector = (long long)offset; | |
1793 | if (!sync_page_io(rdev, bb_sector, sectors << 9, | |
4ce4c73f | 1794 | rdev->bb_page, REQ_OP_READ, true)) |
2699b672 | 1795 | return -EIO; |
00485d09 | 1796 | bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
1797 | rdev->badblocks.shift = sb->bblog_shift; |
1798 | for (i = 0 ; i < (sectors << (9-3)) ; i++, bbp++) { | |
1799 | u64 bb = le64_to_cpu(*bbp); | |
1800 | int count = bb & (0x3ff); | |
1801 | u64 sector = bb >> 10; | |
1802 | sector <<= sb->bblog_shift; | |
1803 | count <<= sb->bblog_shift; | |
1804 | if (bb + 1 == 0) | |
1805 | break; | |
fc974ee2 | 1806 | if (badblocks_set(&rdev->badblocks, sector, count, 1)) |
2699b672 N |
1807 | return -EINVAL; |
1808 | } | |
486adf72 N |
1809 | } else if (sb->bblog_offset != 0) |
1810 | rdev->badblocks.shift = 0; | |
2699b672 | 1811 | |
ddc08823 PB |
1812 | if ((le32_to_cpu(sb->feature_map) & |
1813 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS))) { | |
ea0213e0 AP |
1814 | rdev->ppl.offset = (__s16)le16_to_cpu(sb->ppl.offset); |
1815 | rdev->ppl.size = le16_to_cpu(sb->ppl.size); | |
1816 | rdev->ppl.sector = rdev->sb_start + rdev->ppl.offset; | |
1817 | } | |
1818 | ||
33f2c35a N |
1819 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT) && |
1820 | sb->level != 0) | |
1821 | return -EINVAL; | |
1822 | ||
d8730f0c SL |
1823 | /* not spare disk */ |
1824 | if (rdev->desc_nr >= 0 && rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
1825 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || | |
1826 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL)) | |
228fc7d7 | 1827 | spare_disk = false; |
6a5cb53a | 1828 | |
9a7b2b0f | 1829 | if (!refdev) { |
228fc7d7 | 1830 | if (!spare_disk) |
6a5cb53a YY |
1831 | ret = 1; |
1832 | else | |
1833 | ret = 0; | |
9a7b2b0f | 1834 | } else { |
1da177e4 | 1835 | __u64 ev1, ev2; |
65a06f06 | 1836 | struct mdp_superblock_1 *refsb = page_address(refdev->sb_page); |
1da177e4 LT |
1837 | |
1838 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16) != 0 || | |
1839 | sb->level != refsb->level || | |
1840 | sb->layout != refsb->layout || | |
1841 | sb->chunksize != refsb->chunksize) { | |
913cce5a CH |
1842 | pr_warn("md: %pg has strangely different superblock to %pg\n", |
1843 | rdev->bdev, | |
1844 | refdev->bdev); | |
1da177e4 LT |
1845 | return -EINVAL; |
1846 | } | |
1847 | ev1 = le64_to_cpu(sb->events); | |
1848 | ev2 = le64_to_cpu(refsb->events); | |
1849 | ||
228fc7d7 | 1850 | if (!spare_disk && ev1 > ev2) |
8ed75463 N |
1851 | ret = 1; |
1852 | else | |
1853 | ret = 0; | |
1da177e4 | 1854 | } |
0fe80347 CH |
1855 | if (minor_version) |
1856 | sectors = bdev_nr_sectors(rdev->bdev) - rdev->data_offset; | |
1857 | else | |
c6563a8c N |
1858 | sectors = rdev->sb_start; |
1859 | if (sectors < le64_to_cpu(sb->data_size)) | |
1da177e4 | 1860 | return -EINVAL; |
dd8ac336 | 1861 | rdev->sectors = le64_to_cpu(sb->data_size); |
8ed75463 | 1862 | return ret; |
1da177e4 LT |
1863 | } |
1864 | ||
dc1cc22e | 1865 | static int super_1_validate(struct mddev *mddev, struct md_rdev *freshest, struct md_rdev *rdev) |
1da177e4 | 1866 | { |
65a06f06 | 1867 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
07d84d10 | 1868 | __u64 ev1 = le64_to_cpu(sb->events); |
d8730f0c | 1869 | int role; |
1da177e4 | 1870 | |
41158c7e | 1871 | rdev->raid_disk = -1; |
c5d79adb N |
1872 | clear_bit(Faulty, &rdev->flags); |
1873 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1874 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1875 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1876 | |
1da177e4 LT |
1877 | if (mddev->raid_disks == 0) { |
1878 | mddev->major_version = 1; | |
1879 | mddev->patch_version = 0; | |
e691063a | 1880 | mddev->external = 0; |
9d8f0363 | 1881 | mddev->chunk_sectors = le32_to_cpu(sb->chunksize); |
9ebc6ef1 DD |
1882 | mddev->ctime = le64_to_cpu(sb->ctime); |
1883 | mddev->utime = le64_to_cpu(sb->utime); | |
1da177e4 | 1884 | mddev->level = le32_to_cpu(sb->level); |
d9d166c2 | 1885 | mddev->clevel[0] = 0; |
1da177e4 LT |
1886 | mddev->layout = le32_to_cpu(sb->layout); |
1887 | mddev->raid_disks = le32_to_cpu(sb->raid_disks); | |
58c0fed4 | 1888 | mddev->dev_sectors = le64_to_cpu(sb->size); |
07d84d10 | 1889 | mddev->events = ev1; |
c3d9714e | 1890 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1891 | mddev->bitmap_info.space = 0; |
1892 | /* Default location for bitmap is 1K after superblock | |
1893 | * using 3K - total of 4K | |
1894 | */ | |
c3d9714e | 1895 | mddev->bitmap_info.default_offset = 1024 >> 9; |
6409bb05 | 1896 | mddev->bitmap_info.default_space = (4096-1024) >> 9; |
2c810cdd N |
1897 | mddev->reshape_backwards = 0; |
1898 | ||
1da177e4 LT |
1899 | mddev->recovery_cp = le64_to_cpu(sb->resync_offset); |
1900 | memcpy(mddev->uuid, sb->set_uuid, 16); | |
1901 | ||
1902 | mddev->max_disks = (4096-256)/2; | |
a654b9d8 | 1903 | |
71c0805c | 1904 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) && |
6409bb05 | 1905 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1906 | mddev->bitmap_info.offset = |
1907 | (__s32)le32_to_cpu(sb->bitmap_offset); | |
6409bb05 N |
1908 | /* Metadata doesn't record how much space is available. |
1909 | * For 1.0, we assume we can use up to the superblock | |
1910 | * if before, else to 4K beyond superblock. | |
1911 | * For others, assume no change is possible. | |
1912 | */ | |
1913 | if (mddev->minor_version > 0) | |
1914 | mddev->bitmap_info.space = 0; | |
1915 | else if (mddev->bitmap_info.offset > 0) | |
1916 | mddev->bitmap_info.space = | |
1917 | 8 - mddev->bitmap_info.offset; | |
1918 | else | |
1919 | mddev->bitmap_info.space = | |
1920 | -mddev->bitmap_info.offset; | |
1921 | } | |
e11e93fa | 1922 | |
f6705578 N |
1923 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { |
1924 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); | |
1925 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); | |
1926 | mddev->new_level = le32_to_cpu(sb->new_level); | |
1927 | mddev->new_layout = le32_to_cpu(sb->new_layout); | |
664e7c41 | 1928 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_chunk); |
2c810cdd N |
1929 | if (mddev->delta_disks < 0 || |
1930 | (mddev->delta_disks == 0 && | |
1931 | (le32_to_cpu(sb->feature_map) | |
1932 | & MD_FEATURE_RESHAPE_BACKWARDS))) | |
1933 | mddev->reshape_backwards = 1; | |
f6705578 N |
1934 | } else { |
1935 | mddev->reshape_position = MaxSector; | |
1936 | mddev->delta_disks = 0; | |
1937 | mddev->new_level = mddev->level; | |
1938 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1939 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1940 | } |
1941 | ||
33f2c35a N |
1942 | if (mddev->level == 0 && |
1943 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT)) | |
1944 | mddev->layout = -1; | |
1945 | ||
486b0f7b | 1946 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL) |
a62ab49e | 1947 | set_bit(MD_HAS_JOURNAL, &mddev->flags); |
ea0213e0 | 1948 | |
ddc08823 PB |
1949 | if (le32_to_cpu(sb->feature_map) & |
1950 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS)) { | |
ea0213e0 AP |
1951 | if (le32_to_cpu(sb->feature_map) & |
1952 | (MD_FEATURE_BITMAP_OFFSET | MD_FEATURE_JOURNAL)) | |
1953 | return -EINVAL; | |
ddc08823 PB |
1954 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_PPL) && |
1955 | (le32_to_cpu(sb->feature_map) & | |
1956 | MD_FEATURE_MULTIPLE_PPLS)) | |
1957 | return -EINVAL; | |
ea0213e0 AP |
1958 | set_bit(MD_HAS_PPL, &mddev->flags); |
1959 | } | |
41158c7e | 1960 | } else if (mddev->pers == NULL) { |
be6800a7 | 1961 | /* Insist of good event counter while assembling, except for |
dc1cc22e AL |
1962 | * spares (which don't need an event count). |
1963 | * Similar to mdadm, we allow event counter difference of 1 | |
1964 | * from the freshest device. | |
1965 | */ | |
be6800a7 N |
1966 | if (rdev->desc_nr >= 0 && |
1967 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
a3dfbdaa SL |
1968 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || |
1969 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL)) | |
dc1cc22e | 1970 | if (ev1 + 1 < mddev->events) |
be6800a7 | 1971 | return -EINVAL; |
41158c7e N |
1972 | } else if (mddev->bitmap) { |
1973 | /* If adding to array with a bitmap, then we can accept an | |
1974 | * older device, but not too old. | |
1975 | */ | |
41158c7e N |
1976 | if (ev1 < mddev->bitmap->events_cleared) |
1977 | return 0; | |
8313b8e5 N |
1978 | if (ev1 < mddev->events) |
1979 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1980 | } else { |
1981 | if (ev1 < mddev->events) | |
1982 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1983 | return 0; | |
1984 | } | |
dc1cc22e | 1985 | |
d8730f0c SL |
1986 | if (rdev->desc_nr < 0 || |
1987 | rdev->desc_nr >= le32_to_cpu(sb->max_dev)) { | |
1988 | role = MD_DISK_ROLE_SPARE; | |
1989 | rdev->desc_nr = -1; | |
1990 | } else if (mddev->pers == NULL && freshest && ev1 < mddev->events) { | |
1991 | /* | |
1992 | * If we are assembling, and our event counter is smaller than the | |
1993 | * highest event counter, we cannot trust our superblock about the role. | |
1994 | * It could happen that our rdev was marked as Faulty, and all other | |
1995 | * superblocks were updated with +1 event counter. | |
1996 | * Then, before the next superblock update, which typically happens when | |
1997 | * remove_and_add_spares() removes the device from the array, there was | |
1998 | * a crash or reboot. | |
1999 | * If we allow current rdev without consulting the freshest superblock, | |
2000 | * we could cause data corruption. | |
2001 | * Note that in this case our event counter is smaller by 1 than the | |
2002 | * highest, otherwise, this rdev would not be allowed into array; | |
2003 | * both kernel and mdadm allow event counter difference of 1. | |
2004 | */ | |
2005 | struct mdp_superblock_1 *freshest_sb = page_address(freshest->sb_page); | |
2006 | u32 freshest_max_dev = le32_to_cpu(freshest_sb->max_dev); | |
2007 | ||
2008 | if (rdev->desc_nr >= freshest_max_dev) { | |
2009 | /* this is unexpected, better not proceed */ | |
2010 | pr_warn("md: %s: rdev[%pg]: desc_nr(%d) >= freshest(%pg)->sb->max_dev(%u)\n", | |
2011 | mdname(mddev), rdev->bdev, rdev->desc_nr, | |
2012 | freshest->bdev, freshest_max_dev); | |
2013 | return -EUCLEAN; | |
1da177e4 | 2014 | } |
d8730f0c SL |
2015 | |
2016 | role = le16_to_cpu(freshest_sb->dev_roles[rdev->desc_nr]); | |
2017 | pr_debug("md: %s: rdev[%pg]: role=%d(0x%x) according to freshest %pg\n", | |
2018 | mdname(mddev), rdev->bdev, role, role, freshest->bdev); | |
2019 | } else { | |
2020 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
2021 | } | |
2022 | switch (role) { | |
2023 | case MD_DISK_ROLE_SPARE: /* spare */ | |
2024 | break; | |
2025 | case MD_DISK_ROLE_FAULTY: /* faulty */ | |
2026 | set_bit(Faulty, &rdev->flags); | |
2027 | break; | |
2028 | case MD_DISK_ROLE_JOURNAL: /* journal device */ | |
2029 | if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL)) { | |
2030 | /* journal device without journal feature */ | |
2031 | pr_warn("md: journal device provided without journal feature, ignoring the device\n"); | |
2032 | return -EINVAL; | |
1da177e4 | 2033 | } |
d8730f0c SL |
2034 | set_bit(Journal, &rdev->flags); |
2035 | rdev->journal_tail = le64_to_cpu(sb->journal_tail); | |
2036 | rdev->raid_disk = 0; | |
2037 | break; | |
2038 | default: | |
2039 | rdev->saved_raid_disk = role; | |
2040 | if ((le32_to_cpu(sb->feature_map) & | |
2041 | MD_FEATURE_RECOVERY_OFFSET)) { | |
2042 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); | |
2043 | if (!(le32_to_cpu(sb->feature_map) & | |
2044 | MD_FEATURE_RECOVERY_BITMAP)) | |
2045 | rdev->saved_raid_disk = -1; | |
2046 | } else { | |
2047 | /* | |
2048 | * If the array is FROZEN, then the device can't | |
2049 | * be in_sync with rest of array. | |
2050 | */ | |
2051 | if (!test_bit(MD_RECOVERY_FROZEN, | |
2052 | &mddev->recovery)) | |
2053 | set_bit(In_sync, &rdev->flags); | |
2054 | } | |
2055 | rdev->raid_disk = role; | |
2056 | break; | |
2057 | } | |
2058 | if (sb->devflags & WriteMostly1) | |
2059 | set_bit(WriteMostly, &rdev->flags); | |
2060 | if (sb->devflags & FailFast1) | |
2061 | set_bit(FailFast, &rdev->flags); | |
2062 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) | |
2063 | set_bit(Replacement, &rdev->flags); | |
41158c7e | 2064 | |
1da177e4 LT |
2065 | return 0; |
2066 | } | |
2067 | ||
fd01b88c | 2068 | static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
2069 | { |
2070 | struct mdp_superblock_1 *sb; | |
3cb03002 | 2071 | struct md_rdev *rdev2; |
1da177e4 LT |
2072 | int max_dev, i; |
2073 | /* make rdev->sb match mddev and rdev data. */ | |
2074 | ||
65a06f06 | 2075 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
2076 | |
2077 | sb->feature_map = 0; | |
2078 | sb->pad0 = 0; | |
5fd6c1dc | 2079 | sb->recovery_offset = cpu_to_le64(0); |
1da177e4 LT |
2080 | memset(sb->pad3, 0, sizeof(sb->pad3)); |
2081 | ||
2082 | sb->utime = cpu_to_le64((__u64)mddev->utime); | |
2083 | sb->events = cpu_to_le64(mddev->events); | |
2084 | if (mddev->in_sync) | |
2085 | sb->resync_offset = cpu_to_le64(mddev->recovery_cp); | |
bd18f646 SL |
2086 | else if (test_bit(MD_JOURNAL_CLEAN, &mddev->flags)) |
2087 | sb->resync_offset = cpu_to_le64(MaxSector); | |
1da177e4 LT |
2088 | else |
2089 | sb->resync_offset = cpu_to_le64(0); | |
2090 | ||
1c05b4bc | 2091 | sb->cnt_corrected_read = cpu_to_le32(atomic_read(&rdev->corrected_errors)); |
4dbcdc75 | 2092 | |
f0ca340c | 2093 | sb->raid_disks = cpu_to_le32(mddev->raid_disks); |
58c0fed4 | 2094 | sb->size = cpu_to_le64(mddev->dev_sectors); |
9d8f0363 | 2095 | sb->chunksize = cpu_to_le32(mddev->chunk_sectors); |
62e1e389 N |
2096 | sb->level = cpu_to_le32(mddev->level); |
2097 | sb->layout = cpu_to_le32(mddev->layout); | |
688834e6 N |
2098 | if (test_bit(FailFast, &rdev->flags)) |
2099 | sb->devflags |= FailFast1; | |
2100 | else | |
2101 | sb->devflags &= ~FailFast1; | |
f0ca340c | 2102 | |
aeb9b211 N |
2103 | if (test_bit(WriteMostly, &rdev->flags)) |
2104 | sb->devflags |= WriteMostly1; | |
2105 | else | |
2106 | sb->devflags &= ~WriteMostly1; | |
c6563a8c N |
2107 | sb->data_offset = cpu_to_le64(rdev->data_offset); |
2108 | sb->data_size = cpu_to_le64(rdev->sectors); | |
aeb9b211 | 2109 | |
c3d9714e N |
2110 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) { |
2111 | sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset); | |
71c0805c | 2112 | sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); |
a654b9d8 | 2113 | } |
5fd6c1dc | 2114 | |
f2076e7d | 2115 | if (rdev->raid_disk >= 0 && !test_bit(Journal, &rdev->flags) && |
97e4f42d | 2116 | !test_bit(In_sync, &rdev->flags)) { |
93be75ff N |
2117 | sb->feature_map |= |
2118 | cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET); | |
2119 | sb->recovery_offset = | |
2120 | cpu_to_le64(rdev->recovery_offset); | |
f466722c N |
2121 | if (rdev->saved_raid_disk >= 0 && mddev->bitmap) |
2122 | sb->feature_map |= | |
2123 | cpu_to_le32(MD_FEATURE_RECOVERY_BITMAP); | |
5fd6c1dc | 2124 | } |
3069aa8d SL |
2125 | /* Note: recovery_offset and journal_tail share space */ |
2126 | if (test_bit(Journal, &rdev->flags)) | |
2127 | sb->journal_tail = cpu_to_le64(rdev->journal_tail); | |
2d78f8c4 N |
2128 | if (test_bit(Replacement, &rdev->flags)) |
2129 | sb->feature_map |= | |
2130 | cpu_to_le32(MD_FEATURE_REPLACEMENT); | |
5fd6c1dc | 2131 | |
f6705578 N |
2132 | if (mddev->reshape_position != MaxSector) { |
2133 | sb->feature_map |= cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); | |
2134 | sb->reshape_position = cpu_to_le64(mddev->reshape_position); | |
2135 | sb->new_layout = cpu_to_le32(mddev->new_layout); | |
2136 | sb->delta_disks = cpu_to_le32(mddev->delta_disks); | |
2137 | sb->new_level = cpu_to_le32(mddev->new_level); | |
664e7c41 | 2138 | sb->new_chunk = cpu_to_le32(mddev->new_chunk_sectors); |
2c810cdd N |
2139 | if (mddev->delta_disks == 0 && |
2140 | mddev->reshape_backwards) | |
2141 | sb->feature_map | |
2142 | |= cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS); | |
c6563a8c N |
2143 | if (rdev->new_data_offset != rdev->data_offset) { |
2144 | sb->feature_map | |
2145 | |= cpu_to_le32(MD_FEATURE_NEW_OFFSET); | |
2146 | sb->new_offset = cpu_to_le32((__u32)(rdev->new_data_offset | |
2147 | - rdev->data_offset)); | |
2148 | } | |
f6705578 | 2149 | } |
a654b9d8 | 2150 | |
3c462c88 GR |
2151 | if (mddev_is_clustered(mddev)) |
2152 | sb->feature_map |= cpu_to_le32(MD_FEATURE_CLUSTERED); | |
2153 | ||
2699b672 N |
2154 | if (rdev->badblocks.count == 0) |
2155 | /* Nothing to do for bad blocks*/ ; | |
2156 | else if (sb->bblog_offset == 0) | |
2157 | /* Cannot record bad blocks on this device */ | |
2158 | md_error(mddev, rdev); | |
2159 | else { | |
2160 | struct badblocks *bb = &rdev->badblocks; | |
ae50640b | 2161 | __le64 *bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
2162 | u64 *p = bb->page; |
2163 | sb->feature_map |= cpu_to_le32(MD_FEATURE_BAD_BLOCKS); | |
2164 | if (bb->changed) { | |
2165 | unsigned seq; | |
2166 | ||
2167 | retry: | |
2168 | seq = read_seqbegin(&bb->lock); | |
2169 | ||
2170 | memset(bbp, 0xff, PAGE_SIZE); | |
2171 | ||
2172 | for (i = 0 ; i < bb->count ; i++) { | |
35f9ac2d | 2173 | u64 internal_bb = p[i]; |
2699b672 N |
2174 | u64 store_bb = ((BB_OFFSET(internal_bb) << 10) |
2175 | | BB_LEN(internal_bb)); | |
35f9ac2d | 2176 | bbp[i] = cpu_to_le64(store_bb); |
2699b672 | 2177 | } |
d0962936 | 2178 | bb->changed = 0; |
2699b672 N |
2179 | if (read_seqretry(&bb->lock, seq)) |
2180 | goto retry; | |
2181 | ||
2182 | bb->sector = (rdev->sb_start + | |
2183 | (int)le32_to_cpu(sb->bblog_offset)); | |
2184 | bb->size = le16_to_cpu(sb->bblog_size); | |
2699b672 N |
2185 | } |
2186 | } | |
2187 | ||
1da177e4 | 2188 | max_dev = 0; |
dafb20fa | 2189 | rdev_for_each(rdev2, mddev) |
1da177e4 LT |
2190 | if (rdev2->desc_nr+1 > max_dev) |
2191 | max_dev = rdev2->desc_nr+1; | |
a778b73f | 2192 | |
70471daf N |
2193 | if (max_dev > le32_to_cpu(sb->max_dev)) { |
2194 | int bmask; | |
a778b73f | 2195 | sb->max_dev = cpu_to_le32(max_dev); |
70471daf N |
2196 | rdev->sb_size = max_dev * 2 + 256; |
2197 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; | |
2198 | if (rdev->sb_size & bmask) | |
2199 | rdev->sb_size = (rdev->sb_size | bmask) + 1; | |
ddcf3522 N |
2200 | } else |
2201 | max_dev = le32_to_cpu(sb->max_dev); | |
2202 | ||
1da177e4 | 2203 | for (i=0; i<max_dev;i++) |
8df72024 | 2204 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
f72ffdd6 | 2205 | |
a97b7896 SL |
2206 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) |
2207 | sb->feature_map |= cpu_to_le32(MD_FEATURE_JOURNAL); | |
f72ffdd6 | 2208 | |
ea0213e0 | 2209 | if (test_bit(MD_HAS_PPL, &mddev->flags)) { |
ddc08823 PB |
2210 | if (test_bit(MD_HAS_MULTIPLE_PPLS, &mddev->flags)) |
2211 | sb->feature_map |= | |
2212 | cpu_to_le32(MD_FEATURE_MULTIPLE_PPLS); | |
2213 | else | |
2214 | sb->feature_map |= cpu_to_le32(MD_FEATURE_PPL); | |
ea0213e0 AP |
2215 | sb->ppl.offset = cpu_to_le16(rdev->ppl.offset); |
2216 | sb->ppl.size = cpu_to_le16(rdev->ppl.size); | |
2217 | } | |
2218 | ||
dafb20fa | 2219 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 2220 | i = rdev2->desc_nr; |
b2d444d7 | 2221 | if (test_bit(Faulty, &rdev2->flags)) |
c4d4c91b | 2222 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY); |
b2d444d7 | 2223 | else if (test_bit(In_sync, &rdev2->flags)) |
1da177e4 | 2224 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
a97b7896 | 2225 | else if (test_bit(Journal, &rdev2->flags)) |
bac624f3 | 2226 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_JOURNAL); |
93be75ff | 2227 | else if (rdev2->raid_disk >= 0) |
5fd6c1dc | 2228 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
1da177e4 | 2229 | else |
c4d4c91b | 2230 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
1da177e4 LT |
2231 | } |
2232 | ||
1da177e4 LT |
2233 | sb->sb_csum = calc_sb_1_csum(sb); |
2234 | } | |
2235 | ||
d9c0fa50 XN |
2236 | static sector_t super_1_choose_bm_space(sector_t dev_size) |
2237 | { | |
2238 | sector_t bm_space; | |
2239 | ||
2240 | /* if the device is bigger than 8Gig, save 64k for bitmap | |
2241 | * usage, if bigger than 200Gig, save 128k | |
2242 | */ | |
2243 | if (dev_size < 64*2) | |
2244 | bm_space = 0; | |
2245 | else if (dev_size - 64*2 >= 200*1024*1024*2) | |
2246 | bm_space = 128*2; | |
2247 | else if (dev_size - 4*2 > 8*1024*1024*2) | |
2248 | bm_space = 64*2; | |
2249 | else | |
2250 | bm_space = 4*2; | |
2251 | return bm_space; | |
2252 | } | |
2253 | ||
0cd17fec | 2254 | static unsigned long long |
3cb03002 | 2255 | super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec CW |
2256 | { |
2257 | struct mdp_superblock_1 *sb; | |
15f4a5fd | 2258 | sector_t max_sectors; |
58c0fed4 | 2259 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 2260 | return 0; /* component must fit device */ |
c6563a8c N |
2261 | if (rdev->data_offset != rdev->new_data_offset) |
2262 | return 0; /* too confusing */ | |
0f420358 | 2263 | if (rdev->sb_start < rdev->data_offset) { |
0cd17fec | 2264 | /* minor versions 1 and 2; superblock before data */ |
0fe80347 | 2265 | max_sectors = bdev_nr_sectors(rdev->bdev) - rdev->data_offset; |
15f4a5fd AN |
2266 | if (!num_sectors || num_sectors > max_sectors) |
2267 | num_sectors = max_sectors; | |
c3d9714e | 2268 | } else if (rdev->mddev->bitmap_info.offset) { |
0cd17fec CW |
2269 | /* minor version 0 with bitmap we can't move */ |
2270 | return 0; | |
2271 | } else { | |
2272 | /* minor version 0; superblock after data */ | |
d9c0fa50 | 2273 | sector_t sb_start, bm_space; |
0fe80347 | 2274 | sector_t dev_size = bdev_nr_sectors(rdev->bdev); |
d9c0fa50 XN |
2275 | |
2276 | /* 8K is for superblock */ | |
2277 | sb_start = dev_size - 8*2; | |
0f420358 | 2278 | sb_start &= ~(sector_t)(4*2 - 1); |
d9c0fa50 XN |
2279 | |
2280 | bm_space = super_1_choose_bm_space(dev_size); | |
2281 | ||
2282 | /* Space that can be used to store date needs to decrease | |
2283 | * superblock bitmap space and bad block space(4K) | |
2284 | */ | |
2285 | max_sectors = sb_start - bm_space - 4*2; | |
2286 | ||
15f4a5fd AN |
2287 | if (!num_sectors || num_sectors > max_sectors) |
2288 | num_sectors = max_sectors; | |
55df1ce0 | 2289 | rdev->sb_start = sb_start; |
0cd17fec | 2290 | } |
65a06f06 | 2291 | sb = page_address(rdev->sb_page); |
15f4a5fd | 2292 | sb->data_size = cpu_to_le64(num_sectors); |
3fb632e4 | 2293 | sb->super_offset = cpu_to_le64(rdev->sb_start); |
0cd17fec | 2294 | sb->sb_csum = calc_sb_1_csum(sb); |
46533ff7 N |
2295 | do { |
2296 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
2297 | rdev->sb_page); | |
2298 | } while (md_super_wait(rdev->mddev) < 0); | |
c26a44ed | 2299 | return num_sectors; |
c6563a8c N |
2300 | |
2301 | } | |
2302 | ||
2303 | static int | |
2304 | super_1_allow_new_offset(struct md_rdev *rdev, | |
2305 | unsigned long long new_offset) | |
2306 | { | |
2307 | /* All necessary checks on new >= old have been done */ | |
2308 | struct bitmap *bitmap; | |
2309 | if (new_offset >= rdev->data_offset) | |
2310 | return 1; | |
2311 | ||
2312 | /* with 1.0 metadata, there is no metadata to tread on | |
2313 | * so we can always move back */ | |
2314 | if (rdev->mddev->minor_version == 0) | |
2315 | return 1; | |
2316 | ||
2317 | /* otherwise we must be sure not to step on | |
2318 | * any metadata, so stay: | |
2319 | * 36K beyond start of superblock | |
2320 | * beyond end of badblocks | |
2321 | * beyond write-intent bitmap | |
2322 | */ | |
2323 | if (rdev->sb_start + (32+4)*2 > new_offset) | |
2324 | return 0; | |
2325 | bitmap = rdev->mddev->bitmap; | |
2326 | if (bitmap && !rdev->mddev->bitmap_info.file && | |
2327 | rdev->sb_start + rdev->mddev->bitmap_info.offset + | |
1ec885cd | 2328 | bitmap->storage.file_pages * (PAGE_SIZE>>9) > new_offset) |
c6563a8c N |
2329 | return 0; |
2330 | if (rdev->badblocks.sector + rdev->badblocks.size > new_offset) | |
2331 | return 0; | |
2332 | ||
2333 | return 1; | |
0cd17fec | 2334 | } |
1da177e4 | 2335 | |
75c96f85 | 2336 | static struct super_type super_types[] = { |
1da177e4 LT |
2337 | [0] = { |
2338 | .name = "0.90.0", | |
2339 | .owner = THIS_MODULE, | |
0cd17fec CW |
2340 | .load_super = super_90_load, |
2341 | .validate_super = super_90_validate, | |
2342 | .sync_super = super_90_sync, | |
2343 | .rdev_size_change = super_90_rdev_size_change, | |
c6563a8c | 2344 | .allow_new_offset = super_90_allow_new_offset, |
1da177e4 LT |
2345 | }, |
2346 | [1] = { | |
2347 | .name = "md-1", | |
2348 | .owner = THIS_MODULE, | |
0cd17fec CW |
2349 | .load_super = super_1_load, |
2350 | .validate_super = super_1_validate, | |
2351 | .sync_super = super_1_sync, | |
2352 | .rdev_size_change = super_1_rdev_size_change, | |
c6563a8c | 2353 | .allow_new_offset = super_1_allow_new_offset, |
1da177e4 LT |
2354 | }, |
2355 | }; | |
1da177e4 | 2356 | |
fd01b88c | 2357 | static void sync_super(struct mddev *mddev, struct md_rdev *rdev) |
076f968b JB |
2358 | { |
2359 | if (mddev->sync_super) { | |
2360 | mddev->sync_super(mddev, rdev); | |
2361 | return; | |
2362 | } | |
2363 | ||
2364 | BUG_ON(mddev->major_version >= ARRAY_SIZE(super_types)); | |
2365 | ||
2366 | super_types[mddev->major_version].sync_super(mddev, rdev); | |
2367 | } | |
2368 | ||
fd01b88c | 2369 | static int match_mddev_units(struct mddev *mddev1, struct mddev *mddev2) |
1da177e4 | 2370 | { |
3cb03002 | 2371 | struct md_rdev *rdev, *rdev2; |
1da177e4 | 2372 | |
4b80991c | 2373 | rcu_read_lock(); |
0b020e85 SL |
2374 | rdev_for_each_rcu(rdev, mddev1) { |
2375 | if (test_bit(Faulty, &rdev->flags) || | |
2376 | test_bit(Journal, &rdev->flags) || | |
2377 | rdev->raid_disk == -1) | |
2378 | continue; | |
2379 | rdev_for_each_rcu(rdev2, mddev2) { | |
2380 | if (test_bit(Faulty, &rdev2->flags) || | |
2381 | test_bit(Journal, &rdev2->flags) || | |
2382 | rdev2->raid_disk == -1) | |
2383 | continue; | |
61a27e1f | 2384 | if (rdev->bdev->bd_disk == rdev2->bdev->bd_disk) { |
4b80991c | 2385 | rcu_read_unlock(); |
7dd5e7c3 | 2386 | return 1; |
4b80991c | 2387 | } |
0b020e85 SL |
2388 | } |
2389 | } | |
4b80991c | 2390 | rcu_read_unlock(); |
1da177e4 LT |
2391 | return 0; |
2392 | } | |
2393 | ||
2394 | static LIST_HEAD(pending_raid_disks); | |
2395 | ||
ac5e7113 AN |
2396 | /* |
2397 | * Try to register data integrity profile for an mddev | |
2398 | * | |
2399 | * This is called when an array is started and after a disk has been kicked | |
2400 | * from the array. It only succeeds if all working and active component devices | |
2401 | * are integrity capable with matching profiles. | |
2402 | */ | |
fd01b88c | 2403 | int md_integrity_register(struct mddev *mddev) |
ac5e7113 | 2404 | { |
3cb03002 | 2405 | struct md_rdev *rdev, *reference = NULL; |
ac5e7113 AN |
2406 | |
2407 | if (list_empty(&mddev->disks)) | |
2408 | return 0; /* nothing to do */ | |
629acb6a JB |
2409 | if (!mddev->gendisk || blk_get_integrity(mddev->gendisk)) |
2410 | return 0; /* shouldn't register, or already is */ | |
dafb20fa | 2411 | rdev_for_each(rdev, mddev) { |
ac5e7113 AN |
2412 | /* skip spares and non-functional disks */ |
2413 | if (test_bit(Faulty, &rdev->flags)) | |
2414 | continue; | |
2415 | if (rdev->raid_disk < 0) | |
2416 | continue; | |
ac5e7113 AN |
2417 | if (!reference) { |
2418 | /* Use the first rdev as the reference */ | |
2419 | reference = rdev; | |
2420 | continue; | |
2421 | } | |
2422 | /* does this rdev's profile match the reference profile? */ | |
2423 | if (blk_integrity_compare(reference->bdev->bd_disk, | |
2424 | rdev->bdev->bd_disk) < 0) | |
2425 | return -EINVAL; | |
2426 | } | |
89078d57 MP |
2427 | if (!reference || !bdev_get_integrity(reference->bdev)) |
2428 | return 0; | |
ac5e7113 AN |
2429 | /* |
2430 | * All component devices are integrity capable and have matching | |
2431 | * profiles, register the common profile for the md device. | |
2432 | */ | |
25520d55 MP |
2433 | blk_integrity_register(mddev->gendisk, |
2434 | bdev_get_integrity(reference->bdev)); | |
2435 | ||
9d48739e | 2436 | pr_debug("md: data integrity enabled on %s\n", mdname(mddev)); |
10764815 | 2437 | if (bioset_integrity_create(&mddev->bio_set, BIO_POOL_SIZE) || |
daee2024 | 2438 | (mddev->level != 1 && mddev->level != 10 && |
c687297b | 2439 | bioset_integrity_create(&mddev->io_clone_set, BIO_POOL_SIZE))) { |
de3ea66e GJ |
2440 | /* |
2441 | * No need to handle the failure of bioset_integrity_create, | |
2442 | * because the function is called by md_run() -> pers->run(), | |
2443 | * md_run calls bioset_exit -> bioset_integrity_free in case | |
2444 | * of failure case. | |
2445 | */ | |
9d48739e | 2446 | pr_err("md: failed to create integrity pool for %s\n", |
a91a2785 MP |
2447 | mdname(mddev)); |
2448 | return -EINVAL; | |
2449 | } | |
ac5e7113 AN |
2450 | return 0; |
2451 | } | |
2452 | EXPORT_SYMBOL(md_integrity_register); | |
2453 | ||
1501efad DW |
2454 | /* |
2455 | * Attempt to add an rdev, but only if it is consistent with the current | |
2456 | * integrity profile | |
2457 | */ | |
2458 | int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev) | |
3f9d99c1 | 2459 | { |
2863b9eb JB |
2460 | struct blk_integrity *bi_mddev; |
2461 | ||
2462 | if (!mddev->gendisk) | |
1501efad | 2463 | return 0; |
2863b9eb | 2464 | |
2863b9eb | 2465 | bi_mddev = blk_get_integrity(mddev->gendisk); |
3f9d99c1 | 2466 | |
ac5e7113 | 2467 | if (!bi_mddev) /* nothing to do */ |
1501efad DW |
2468 | return 0; |
2469 | ||
2470 | if (blk_integrity_compare(mddev->gendisk, rdev->bdev->bd_disk) != 0) { | |
913cce5a CH |
2471 | pr_err("%s: incompatible integrity profile for %pg\n", |
2472 | mdname(mddev), rdev->bdev); | |
1501efad DW |
2473 | return -ENXIO; |
2474 | } | |
2475 | ||
2476 | return 0; | |
3f9d99c1 | 2477 | } |
ac5e7113 | 2478 | EXPORT_SYMBOL(md_integrity_add_rdev); |
3f9d99c1 | 2479 | |
d7a47838 CH |
2480 | static bool rdev_read_only(struct md_rdev *rdev) |
2481 | { | |
2482 | return bdev_read_only(rdev->bdev) || | |
2483 | (rdev->meta_bdev && bdev_read_only(rdev->meta_bdev)); | |
2484 | } | |
2485 | ||
f72ffdd6 | 2486 | static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) |
1da177e4 | 2487 | { |
7dd5e7c3 | 2488 | char b[BDEVNAME_SIZE]; |
5e55e2f5 | 2489 | int err; |
1da177e4 | 2490 | |
11e2ede0 DW |
2491 | /* prevent duplicates */ |
2492 | if (find_rdev(mddev, rdev->bdev->bd_dev)) | |
2493 | return -EEXIST; | |
2494 | ||
d7a47838 | 2495 | if (rdev_read_only(rdev) && mddev->pers) |
97b20ef7 N |
2496 | return -EROFS; |
2497 | ||
dd8ac336 | 2498 | /* make sure rdev->sectors exceeds mddev->dev_sectors */ |
f6b6ec5c SL |
2499 | if (!test_bit(Journal, &rdev->flags) && |
2500 | rdev->sectors && | |
2501 | (mddev->dev_sectors == 0 || rdev->sectors < mddev->dev_sectors)) { | |
a778b73f N |
2502 | if (mddev->pers) { |
2503 | /* Cannot change size, so fail | |
2504 | * If mddev->level <= 0, then we don't care | |
2505 | * about aligning sizes (e.g. linear) | |
2506 | */ | |
2507 | if (mddev->level > 0) | |
2508 | return -ENOSPC; | |
2509 | } else | |
dd8ac336 | 2510 | mddev->dev_sectors = rdev->sectors; |
2bf071bf | 2511 | } |
1da177e4 LT |
2512 | |
2513 | /* Verify rdev->desc_nr is unique. | |
2514 | * If it is -1, assign a free number, else | |
2515 | * check number is not in use | |
2516 | */ | |
4878e9eb | 2517 | rcu_read_lock(); |
1da177e4 LT |
2518 | if (rdev->desc_nr < 0) { |
2519 | int choice = 0; | |
4878e9eb N |
2520 | if (mddev->pers) |
2521 | choice = mddev->raid_disks; | |
57d051dc | 2522 | while (md_find_rdev_nr_rcu(mddev, choice)) |
1da177e4 LT |
2523 | choice++; |
2524 | rdev->desc_nr = choice; | |
2525 | } else { | |
57d051dc | 2526 | if (md_find_rdev_nr_rcu(mddev, rdev->desc_nr)) { |
4878e9eb | 2527 | rcu_read_unlock(); |
1da177e4 | 2528 | return -EBUSY; |
4878e9eb | 2529 | } |
1da177e4 | 2530 | } |
4878e9eb | 2531 | rcu_read_unlock(); |
f6b6ec5c SL |
2532 | if (!test_bit(Journal, &rdev->flags) && |
2533 | mddev->max_disks && rdev->desc_nr >= mddev->max_disks) { | |
9d48739e N |
2534 | pr_warn("md: %s: array is limited to %d devices\n", |
2535 | mdname(mddev), mddev->max_disks); | |
de01dfad N |
2536 | return -EBUSY; |
2537 | } | |
900d156b | 2538 | snprintf(b, sizeof(b), "%pg", rdev->bdev); |
90a9befb | 2539 | strreplace(b, '/', '!'); |
649316b2 | 2540 | |
1da177e4 | 2541 | rdev->mddev = mddev; |
9d48739e | 2542 | pr_debug("md: bind<%s>\n", b); |
86e6ffdd | 2543 | |
963c555e | 2544 | if (mddev->raid_disks) |
b4128c00 | 2545 | mddev_create_serial_pool(mddev, rdev); |
963c555e | 2546 | |
b2d6db58 | 2547 | if ((err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b))) |
5e55e2f5 | 2548 | goto fail; |
86e6ffdd | 2549 | |
5e3b8a8d | 2550 | /* failure here is OK */ |
8d65269f | 2551 | err = sysfs_create_link(&rdev->kobj, bdev_kobj(rdev->bdev), "block"); |
00bcb4ac | 2552 | rdev->sysfs_state = sysfs_get_dirent_safe(rdev->kobj.sd, "state"); |
e1a86dbb JB |
2553 | rdev->sysfs_unack_badblocks = |
2554 | sysfs_get_dirent_safe(rdev->kobj.sd, "unacknowledged_bad_blocks"); | |
2555 | rdev->sysfs_badblocks = | |
2556 | sysfs_get_dirent_safe(rdev->kobj.sd, "bad_blocks"); | |
3c0ee63a | 2557 | |
4b80991c | 2558 | list_add_rcu(&rdev->same_set, &mddev->disks); |
e09b457b | 2559 | bd_link_disk_holder(rdev->bdev, mddev->gendisk); |
4044ba58 N |
2560 | |
2561 | /* May as well allow recovery to be retried once */ | |
5389042f | 2562 | mddev->recovery_disabled++; |
3f9d99c1 | 2563 | |
1da177e4 | 2564 | return 0; |
5e55e2f5 N |
2565 | |
2566 | fail: | |
9d48739e N |
2567 | pr_warn("md: failed to register dev-%s for %s\n", |
2568 | b, mdname(mddev)); | |
5e55e2f5 | 2569 | return err; |
1da177e4 LT |
2570 | } |
2571 | ||
b5c1acf0 CH |
2572 | void md_autodetect_dev(dev_t dev); |
2573 | ||
2736e8ee CH |
2574 | /* just for claiming the bdev */ |
2575 | static struct md_rdev claim_rdev; | |
2576 | ||
2577 | static void export_rdev(struct md_rdev *rdev, struct mddev *mddev) | |
b5c1acf0 CH |
2578 | { |
2579 | pr_debug("md: export_rdev(%pg)\n", rdev->bdev); | |
2580 | md_rdev_clear(rdev); | |
2581 | #ifndef MODULE | |
2582 | if (test_bit(AutoDetected, &rdev->flags)) | |
2583 | md_autodetect_dev(rdev->bdev->bd_dev); | |
2584 | #endif | |
9f0f5a30 | 2585 | bdev_release(rdev->bdev_handle); |
b5c1acf0 CH |
2586 | rdev->bdev = NULL; |
2587 | kobject_put(&rdev->kobj); | |
2588 | } | |
2589 | ||
2590 | static void md_kick_rdev_from_array(struct md_rdev *rdev) | |
1da177e4 | 2591 | { |
3ce94ce5 YK |
2592 | struct mddev *mddev = rdev->mddev; |
2593 | ||
49731baa | 2594 | bd_unlink_disk_holder(rdev->bdev, rdev->mddev->gendisk); |
4b80991c | 2595 | list_del_rcu(&rdev->same_set); |
913cce5a | 2596 | pr_debug("md: unbind<%pg>\n", rdev->bdev); |
b4128c00 | 2597 | mddev_destroy_serial_pool(rdev->mddev, rdev); |
1da177e4 | 2598 | rdev->mddev = NULL; |
86e6ffdd | 2599 | sysfs_remove_link(&rdev->kobj, "block"); |
3c0ee63a | 2600 | sysfs_put(rdev->sysfs_state); |
e1a86dbb JB |
2601 | sysfs_put(rdev->sysfs_unack_badblocks); |
2602 | sysfs_put(rdev->sysfs_badblocks); | |
3c0ee63a | 2603 | rdev->sysfs_state = NULL; |
e1a86dbb JB |
2604 | rdev->sysfs_unack_badblocks = NULL; |
2605 | rdev->sysfs_badblocks = NULL; | |
2230dfe4 | 2606 | rdev->badblocks.count = 0; |
3ce94ce5 | 2607 | |
4b80991c | 2608 | synchronize_rcu(); |
3ce94ce5 YK |
2609 | |
2610 | /* | |
2611 | * kobject_del() will wait for all in progress writers to be done, where | |
2612 | * reconfig_mutex is held, hence it can't be called under | |
2613 | * reconfig_mutex and it's delayed to mddev_unlock(). | |
2614 | */ | |
3ce94ce5 | 2615 | list_add(&rdev->same_set, &mddev->deleting); |
1da177e4 LT |
2616 | } |
2617 | ||
fd01b88c | 2618 | static void export_array(struct mddev *mddev) |
1da177e4 | 2619 | { |
0638bb0e | 2620 | struct md_rdev *rdev; |
1da177e4 | 2621 | |
0638bb0e N |
2622 | while (!list_empty(&mddev->disks)) { |
2623 | rdev = list_first_entry(&mddev->disks, struct md_rdev, | |
2624 | same_set); | |
fb56dfef | 2625 | md_kick_rdev_from_array(rdev); |
1da177e4 | 2626 | } |
1da177e4 LT |
2627 | mddev->raid_disks = 0; |
2628 | mddev->major_version = 0; | |
2629 | } | |
2630 | ||
6497709b N |
2631 | static bool set_in_sync(struct mddev *mddev) |
2632 | { | |
efa4b77b | 2633 | lockdep_assert_held(&mddev->lock); |
4ad23a97 N |
2634 | if (!mddev->in_sync) { |
2635 | mddev->sync_checkers++; | |
2636 | spin_unlock(&mddev->lock); | |
2637 | percpu_ref_switch_to_atomic_sync(&mddev->writes_pending); | |
2638 | spin_lock(&mddev->lock); | |
2639 | if (!mddev->in_sync && | |
2640 | percpu_ref_is_zero(&mddev->writes_pending)) { | |
6497709b | 2641 | mddev->in_sync = 1; |
4ad23a97 N |
2642 | /* |
2643 | * Ensure ->in_sync is visible before we clear | |
2644 | * ->sync_checkers. | |
2645 | */ | |
55cc39f3 | 2646 | smp_mb(); |
6497709b N |
2647 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2648 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
2649 | } | |
4ad23a97 N |
2650 | if (--mddev->sync_checkers == 0) |
2651 | percpu_ref_switch_to_percpu(&mddev->writes_pending); | |
6497709b N |
2652 | } |
2653 | if (mddev->safemode == 1) | |
2654 | mddev->safemode = 0; | |
2655 | return mddev->in_sync; | |
2656 | } | |
2657 | ||
f72ffdd6 | 2658 | static void sync_sbs(struct mddev *mddev, int nospares) |
1da177e4 | 2659 | { |
42543769 N |
2660 | /* Update each superblock (in-memory image), but |
2661 | * if we are allowed to, skip spares which already | |
2662 | * have the right event counter, or have one earlier | |
2663 | * (which would mean they aren't being marked as dirty | |
2664 | * with the rest of the array) | |
2665 | */ | |
3cb03002 | 2666 | struct md_rdev *rdev; |
dafb20fa | 2667 | rdev_for_each(rdev, mddev) { |
42543769 N |
2668 | if (rdev->sb_events == mddev->events || |
2669 | (nospares && | |
2670 | rdev->raid_disk < 0 && | |
42543769 N |
2671 | rdev->sb_events+1 == mddev->events)) { |
2672 | /* Don't update this superblock */ | |
2673 | rdev->sb_loaded = 2; | |
2674 | } else { | |
076f968b | 2675 | sync_super(mddev, rdev); |
42543769 N |
2676 | rdev->sb_loaded = 1; |
2677 | } | |
1da177e4 LT |
2678 | } |
2679 | } | |
2680 | ||
2aa82191 GR |
2681 | static bool does_sb_need_changing(struct mddev *mddev) |
2682 | { | |
fc873834 | 2683 | struct md_rdev *rdev = NULL, *iter; |
2aa82191 GR |
2684 | struct mdp_superblock_1 *sb; |
2685 | int role; | |
2686 | ||
2687 | /* Find a good rdev */ | |
fc873834 XT |
2688 | rdev_for_each(iter, mddev) |
2689 | if ((iter->raid_disk >= 0) && !test_bit(Faulty, &iter->flags)) { | |
2690 | rdev = iter; | |
2aa82191 | 2691 | break; |
fc873834 | 2692 | } |
2aa82191 GR |
2693 | |
2694 | /* No good device found. */ | |
2695 | if (!rdev) | |
2696 | return false; | |
2697 | ||
2698 | sb = page_address(rdev->sb_page); | |
2699 | /* Check if a device has become faulty or a spare become active */ | |
2700 | rdev_for_each(rdev, mddev) { | |
2701 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
2702 | /* Device activated? */ | |
9151ad5d | 2703 | if (role == MD_DISK_ROLE_SPARE && rdev->raid_disk >= 0 && |
2aa82191 GR |
2704 | !test_bit(Faulty, &rdev->flags)) |
2705 | return true; | |
2706 | /* Device turned faulty? */ | |
9151ad5d | 2707 | if (test_bit(Faulty, &rdev->flags) && (role < MD_DISK_ROLE_MAX)) |
2aa82191 GR |
2708 | return true; |
2709 | } | |
2710 | ||
2711 | /* Check if any mddev parameters have changed */ | |
2712 | if ((mddev->dev_sectors != le64_to_cpu(sb->size)) || | |
2713 | (mddev->reshape_position != le64_to_cpu(sb->reshape_position)) || | |
13459213 | 2714 | (mddev->layout != le32_to_cpu(sb->layout)) || |
2aa82191 GR |
2715 | (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) || |
2716 | (mddev->chunk_sectors != le32_to_cpu(sb->chunksize))) | |
2717 | return true; | |
2718 | ||
2719 | return false; | |
2720 | } | |
2721 | ||
1aee41f6 | 2722 | void md_update_sb(struct mddev *mddev, int force_change) |
1da177e4 | 2723 | { |
3cb03002 | 2724 | struct md_rdev *rdev; |
06d91a5f | 2725 | int sync_req; |
42543769 | 2726 | int nospares = 0; |
2699b672 | 2727 | int any_badblocks_changed = 0; |
23b63f9f | 2728 | int ret = -1; |
1da177e4 | 2729 | |
f97a5528 | 2730 | if (!md_is_rdwr(mddev)) { |
d87f064f | 2731 | if (force_change) |
2953079c | 2732 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
d87f064f N |
2733 | return; |
2734 | } | |
2aa82191 | 2735 | |
2c97cf13 | 2736 | repeat: |
2aa82191 | 2737 | if (mddev_is_clustered(mddev)) { |
2953079c | 2738 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
2aa82191 | 2739 | force_change = 1; |
2953079c | 2740 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
85ad1d13 | 2741 | nospares = 1; |
23b63f9f | 2742 | ret = md_cluster_ops->metadata_update_start(mddev); |
2aa82191 GR |
2743 | /* Has someone else has updated the sb */ |
2744 | if (!does_sb_need_changing(mddev)) { | |
23b63f9f GJ |
2745 | if (ret == 0) |
2746 | md_cluster_ops->metadata_update_cancel(mddev); | |
2953079c SL |
2747 | bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2748 | BIT(MD_SB_CHANGE_DEVS) | | |
2749 | BIT(MD_SB_CHANGE_CLEAN)); | |
2aa82191 GR |
2750 | return; |
2751 | } | |
2752 | } | |
2c97cf13 | 2753 | |
db0505d3 N |
2754 | /* |
2755 | * First make sure individual recovery_offsets are correct | |
2756 | * curr_resync_completed can only be used during recovery. | |
2757 | * During reshape/resync it might use array-addresses rather | |
2758 | * that device addresses. | |
2759 | */ | |
dafb20fa | 2760 | rdev_for_each(rdev, mddev) { |
3a3a5ddb N |
2761 | if (rdev->raid_disk >= 0 && |
2762 | mddev->delta_disks >= 0 && | |
db0505d3 N |
2763 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
2764 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery) && | |
2765 | !test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
f2076e7d | 2766 | !test_bit(Journal, &rdev->flags) && |
3a3a5ddb N |
2767 | !test_bit(In_sync, &rdev->flags) && |
2768 | mddev->curr_resync_completed > rdev->recovery_offset) | |
2769 | rdev->recovery_offset = mddev->curr_resync_completed; | |
2770 | ||
f72ffdd6 | 2771 | } |
bd52b746 | 2772 | if (!mddev->persistent) { |
2953079c SL |
2773 | clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2774 | clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
de393cde | 2775 | if (!mddev->external) { |
2953079c | 2776 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
dafb20fa | 2777 | rdev_for_each(rdev, mddev) { |
de393cde | 2778 | if (rdev->badblocks.changed) { |
d0962936 | 2779 | rdev->badblocks.changed = 0; |
fc974ee2 | 2780 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2781 | md_error(mddev, rdev); |
2782 | } | |
2783 | clear_bit(Blocked, &rdev->flags); | |
2784 | clear_bit(BlockedBadBlocks, &rdev->flags); | |
2785 | wake_up(&rdev->blocked_wait); | |
2786 | } | |
2787 | } | |
3a3a5ddb N |
2788 | wake_up(&mddev->sb_wait); |
2789 | return; | |
2790 | } | |
2791 | ||
85572d7c | 2792 | spin_lock(&mddev->lock); |
84692195 | 2793 | |
9ebc6ef1 | 2794 | mddev->utime = ktime_get_real_seconds(); |
3a3a5ddb | 2795 | |
2953079c | 2796 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
850b2b42 | 2797 | force_change = 1; |
2953079c | 2798 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
850b2b42 N |
2799 | /* just a clean<-> dirty transition, possibly leave spares alone, |
2800 | * though if events isn't the right even/odd, we will have to do | |
2801 | * spares after all | |
2802 | */ | |
2803 | nospares = 1; | |
2804 | if (force_change) | |
2805 | nospares = 0; | |
2806 | if (mddev->degraded) | |
84692195 N |
2807 | /* If the array is degraded, then skipping spares is both |
2808 | * dangerous and fairly pointless. | |
2809 | * Dangerous because a device that was removed from the array | |
2810 | * might have a event_count that still looks up-to-date, | |
2811 | * so it can be re-added without a resync. | |
2812 | * Pointless because if there are any spares to skip, | |
2813 | * then a recovery will happen and soon that array won't | |
2814 | * be degraded any more and the spare can go back to sleep then. | |
2815 | */ | |
850b2b42 | 2816 | nospares = 0; |
84692195 | 2817 | |
06d91a5f | 2818 | sync_req = mddev->in_sync; |
42543769 N |
2819 | |
2820 | /* If this is just a dirty<->clean transition, and the array is clean | |
2821 | * and 'events' is odd, we can roll back to the previous clean state */ | |
850b2b42 | 2822 | if (nospares |
42543769 | 2823 | && (mddev->in_sync && mddev->recovery_cp == MaxSector) |
a8707c08 N |
2824 | && mddev->can_decrease_events |
2825 | && mddev->events != 1) { | |
42543769 | 2826 | mddev->events--; |
a8707c08 N |
2827 | mddev->can_decrease_events = 0; |
2828 | } else { | |
42543769 N |
2829 | /* otherwise we have to go forward and ... */ |
2830 | mddev->events ++; | |
a8707c08 | 2831 | mddev->can_decrease_events = nospares; |
42543769 | 2832 | } |
1da177e4 | 2833 | |
403df478 N |
2834 | /* |
2835 | * This 64-bit counter should never wrap. | |
2836 | * Either we are in around ~1 trillion A.C., assuming | |
2837 | * 1 reboot per second, or we have a bug... | |
2838 | */ | |
2839 | WARN_ON(mddev->events == 0); | |
2699b672 | 2840 | |
dafb20fa | 2841 | rdev_for_each(rdev, mddev) { |
2699b672 N |
2842 | if (rdev->badblocks.changed) |
2843 | any_badblocks_changed++; | |
de393cde N |
2844 | if (test_bit(Faulty, &rdev->flags)) |
2845 | set_bit(FaultRecorded, &rdev->flags); | |
2846 | } | |
2699b672 | 2847 | |
e691063a | 2848 | sync_sbs(mddev, nospares); |
85572d7c | 2849 | spin_unlock(&mddev->lock); |
1da177e4 | 2850 | |
36a4e1fe N |
2851 | pr_debug("md: updating %s RAID superblock on device (in sync %d)\n", |
2852 | mdname(mddev), mddev->in_sync); | |
1da177e4 | 2853 | |
504634f6 SL |
2854 | if (mddev->queue) |
2855 | blk_add_trace_msg(mddev->queue, "md md_update_sb"); | |
46533ff7 | 2856 | rewrite: |
e64e4018 | 2857 | md_bitmap_update_sb(mddev->bitmap); |
dafb20fa | 2858 | rdev_for_each(rdev, mddev) { |
42543769 N |
2859 | if (rdev->sb_loaded != 1) |
2860 | continue; /* no noise on spare devices */ | |
1da177e4 | 2861 | |
f466722c | 2862 | if (!test_bit(Faulty, &rdev->flags)) { |
7bfa19f2 | 2863 | md_super_write(mddev,rdev, |
0f420358 | 2864 | rdev->sb_start, rdev->sb_size, |
7bfa19f2 | 2865 | rdev->sb_page); |
913cce5a CH |
2866 | pr_debug("md: (write) %pg's sb offset: %llu\n", |
2867 | rdev->bdev, | |
36a4e1fe | 2868 | (unsigned long long)rdev->sb_start); |
42543769 | 2869 | rdev->sb_events = mddev->events; |
2699b672 N |
2870 | if (rdev->badblocks.size) { |
2871 | md_super_write(mddev, rdev, | |
2872 | rdev->badblocks.sector, | |
2873 | rdev->badblocks.size << 9, | |
2874 | rdev->bb_page); | |
2875 | rdev->badblocks.size = 0; | |
2876 | } | |
7bfa19f2 | 2877 | |
f466722c | 2878 | } else |
913cce5a CH |
2879 | pr_debug("md: %pg (skipping faulty)\n", |
2880 | rdev->bdev); | |
1da177e4 | 2881 | } |
46533ff7 N |
2882 | if (md_super_wait(mddev) < 0) |
2883 | goto rewrite; | |
2953079c | 2884 | /* if there was a failure, MD_SB_CHANGE_DEVS was set, and we re-write super */ |
7bfa19f2 | 2885 | |
2c97cf13 GJ |
2886 | if (mddev_is_clustered(mddev) && ret == 0) |
2887 | md_cluster_ops->metadata_update_finish(mddev); | |
2888 | ||
850b2b42 | 2889 | if (mddev->in_sync != sync_req || |
2953079c SL |
2890 | !bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2891 | BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_CLEAN))) | |
06d91a5f | 2892 | /* have to write it out again */ |
06d91a5f | 2893 | goto repeat; |
3d310eb7 | 2894 | wake_up(&mddev->sb_wait); |
acb180b0 | 2895 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
e1a86dbb | 2896 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
06d91a5f | 2897 | |
dafb20fa | 2898 | rdev_for_each(rdev, mddev) { |
de393cde N |
2899 | if (test_and_clear_bit(FaultRecorded, &rdev->flags)) |
2900 | clear_bit(Blocked, &rdev->flags); | |
2901 | ||
2902 | if (any_badblocks_changed) | |
fc974ee2 | 2903 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2904 | clear_bit(BlockedBadBlocks, &rdev->flags); |
2905 | wake_up(&rdev->blocked_wait); | |
2906 | } | |
1da177e4 | 2907 | } |
1aee41f6 | 2908 | EXPORT_SYMBOL(md_update_sb); |
1da177e4 | 2909 | |
a6da4ef8 GR |
2910 | static int add_bound_rdev(struct md_rdev *rdev) |
2911 | { | |
2912 | struct mddev *mddev = rdev->mddev; | |
2913 | int err = 0; | |
87d4d916 | 2914 | bool add_journal = test_bit(Journal, &rdev->flags); |
a6da4ef8 | 2915 | |
87d4d916 | 2916 | if (!mddev->pers->hot_remove_disk || add_journal) { |
a6da4ef8 GR |
2917 | /* If there is hot_add_disk but no hot_remove_disk |
2918 | * then added disks for geometry changes, | |
2919 | * and should be added immediately. | |
2920 | */ | |
2921 | super_types[mddev->major_version]. | |
dc1cc22e | 2922 | validate_super(mddev, NULL/*freshest*/, rdev); |
a6da4ef8 GR |
2923 | err = mddev->pers->hot_add_disk(mddev, rdev); |
2924 | if (err) { | |
db767672 | 2925 | md_kick_rdev_from_array(rdev); |
a6da4ef8 GR |
2926 | return err; |
2927 | } | |
2928 | } | |
2929 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2930 | ||
2953079c | 2931 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a6da4ef8 GR |
2932 | if (mddev->degraded) |
2933 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
2934 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
54679486 | 2935 | md_new_event(); |
a6da4ef8 GR |
2936 | md_wakeup_thread(mddev->thread); |
2937 | return 0; | |
2938 | } | |
1da177e4 | 2939 | |
7f6ce769 | 2940 | /* words written to sysfs files may, or may not, be \n terminated. |
bce74dac N |
2941 | * We want to accept with case. For this we use cmd_match. |
2942 | */ | |
2943 | static int cmd_match(const char *cmd, const char *str) | |
2944 | { | |
2945 | /* See if cmd, written into a sysfs file, matches | |
2946 | * str. They must either be the same, or cmd can | |
2947 | * have a trailing newline | |
2948 | */ | |
2949 | while (*cmd && *str && *cmd == *str) { | |
2950 | cmd++; | |
2951 | str++; | |
2952 | } | |
2953 | if (*cmd == '\n') | |
2954 | cmd++; | |
2955 | if (*str || *cmd) | |
2956 | return 0; | |
2957 | return 1; | |
2958 | } | |
2959 | ||
86e6ffdd N |
2960 | struct rdev_sysfs_entry { |
2961 | struct attribute attr; | |
3cb03002 N |
2962 | ssize_t (*show)(struct md_rdev *, char *); |
2963 | ssize_t (*store)(struct md_rdev *, const char *, size_t); | |
86e6ffdd N |
2964 | }; |
2965 | ||
2966 | static ssize_t | |
3cb03002 | 2967 | state_show(struct md_rdev *rdev, char *page) |
86e6ffdd | 2968 | { |
35b785f7 | 2969 | char *sep = ","; |
20a49ff6 | 2970 | size_t len = 0; |
6aa7de05 | 2971 | unsigned long flags = READ_ONCE(rdev->flags); |
86e6ffdd | 2972 | |
758bfc8a | 2973 | if (test_bit(Faulty, &flags) || |
dcbcb486 TM |
2974 | (!test_bit(ExternalBbl, &flags) && |
2975 | rdev->badblocks.unacked_exist)) | |
35b785f7 TM |
2976 | len += sprintf(page+len, "faulty%s", sep); |
2977 | if (test_bit(In_sync, &flags)) | |
2978 | len += sprintf(page+len, "in_sync%s", sep); | |
2979 | if (test_bit(Journal, &flags)) | |
2980 | len += sprintf(page+len, "journal%s", sep); | |
2981 | if (test_bit(WriteMostly, &flags)) | |
2982 | len += sprintf(page+len, "write_mostly%s", sep); | |
758bfc8a | 2983 | if (test_bit(Blocked, &flags) || |
52c64152 | 2984 | (rdev->badblocks.unacked_exist |
35b785f7 TM |
2985 | && !test_bit(Faulty, &flags))) |
2986 | len += sprintf(page+len, "blocked%s", sep); | |
758bfc8a | 2987 | if (!test_bit(Faulty, &flags) && |
f2076e7d | 2988 | !test_bit(Journal, &flags) && |
35b785f7 TM |
2989 | !test_bit(In_sync, &flags)) |
2990 | len += sprintf(page+len, "spare%s", sep); | |
2991 | if (test_bit(WriteErrorSeen, &flags)) | |
2992 | len += sprintf(page+len, "write_error%s", sep); | |
2993 | if (test_bit(WantReplacement, &flags)) | |
2994 | len += sprintf(page+len, "want_replacement%s", sep); | |
2995 | if (test_bit(Replacement, &flags)) | |
2996 | len += sprintf(page+len, "replacement%s", sep); | |
2997 | if (test_bit(ExternalBbl, &flags)) | |
2998 | len += sprintf(page+len, "external_bbl%s", sep); | |
688834e6 N |
2999 | if (test_bit(FailFast, &flags)) |
3000 | len += sprintf(page+len, "failfast%s", sep); | |
35b785f7 TM |
3001 | |
3002 | if (len) | |
3003 | len -= strlen(sep); | |
2d78f8c4 | 3004 | |
86e6ffdd N |
3005 | return len+sprintf(page+len, "\n"); |
3006 | } | |
3007 | ||
45dc2de1 | 3008 | static ssize_t |
3cb03002 | 3009 | state_store(struct md_rdev *rdev, const char *buf, size_t len) |
45dc2de1 N |
3010 | { |
3011 | /* can write | |
de393cde | 3012 | * faulty - simulates an error |
45dc2de1 | 3013 | * remove - disconnects the device |
f655675b N |
3014 | * writemostly - sets write_mostly |
3015 | * -writemostly - clears write_mostly | |
de393cde N |
3016 | * blocked - sets the Blocked flags |
3017 | * -blocked - clears the Blocked and possibly simulates an error | |
6d56e278 | 3018 | * insync - sets Insync providing device isn't active |
f466722c N |
3019 | * -insync - clear Insync for a device with a slot assigned, |
3020 | * so that it gets rebuilt based on bitmap | |
d7a9d443 N |
3021 | * write_error - sets WriteErrorSeen |
3022 | * -write_error - clears WriteErrorSeen | |
688834e6 | 3023 | * {,-}failfast - set/clear FailFast |
45dc2de1 | 3024 | */ |
8b9e2291 XN |
3025 | |
3026 | struct mddev *mddev = rdev->mddev; | |
45dc2de1 | 3027 | int err = -EINVAL; |
8b9e2291 XN |
3028 | bool need_update_sb = false; |
3029 | ||
45dc2de1 N |
3030 | if (cmd_match(buf, "faulty") && rdev->mddev->pers) { |
3031 | md_error(rdev->mddev, rdev); | |
9631abdb MT |
3032 | |
3033 | if (test_bit(MD_BROKEN, &rdev->mddev->flags)) | |
5ef56c8f | 3034 | err = -EBUSY; |
9631abdb MT |
3035 | else |
3036 | err = 0; | |
45dc2de1 | 3037 | } else if (cmd_match(buf, "remove")) { |
5d881783 SL |
3038 | if (rdev->mddev->pers) { |
3039 | clear_bit(Blocked, &rdev->flags); | |
3040 | remove_and_add_spares(rdev->mddev, rdev); | |
3041 | } | |
45dc2de1 N |
3042 | if (rdev->raid_disk >= 0) |
3043 | err = -EBUSY; | |
3044 | else { | |
45dc2de1 | 3045 | err = 0; |
a9720903 GJ |
3046 | if (mddev_is_clustered(mddev)) |
3047 | err = md_cluster_ops->remove_disk(mddev, rdev); | |
3048 | ||
3049 | if (err == 0) { | |
3050 | md_kick_rdev_from_array(rdev); | |
060b0689 | 3051 | if (mddev->pers) { |
2953079c | 3052 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
3053 | md_wakeup_thread(mddev->thread); |
3054 | } | |
54679486 | 3055 | md_new_event(); |
a9720903 | 3056 | } |
45dc2de1 | 3057 | } |
f655675b N |
3058 | } else if (cmd_match(buf, "writemostly")) { |
3059 | set_bit(WriteMostly, &rdev->flags); | |
b4128c00 | 3060 | mddev_create_serial_pool(rdev->mddev, rdev); |
8b9e2291 | 3061 | need_update_sb = true; |
f655675b N |
3062 | err = 0; |
3063 | } else if (cmd_match(buf, "-writemostly")) { | |
b4128c00 | 3064 | mddev_destroy_serial_pool(rdev->mddev, rdev); |
f655675b | 3065 | clear_bit(WriteMostly, &rdev->flags); |
8b9e2291 | 3066 | need_update_sb = true; |
6bfe0b49 DW |
3067 | err = 0; |
3068 | } else if (cmd_match(buf, "blocked")) { | |
3069 | set_bit(Blocked, &rdev->flags); | |
3070 | err = 0; | |
3071 | } else if (cmd_match(buf, "-blocked")) { | |
de393cde | 3072 | if (!test_bit(Faulty, &rdev->flags) && |
dcbcb486 | 3073 | !test_bit(ExternalBbl, &rdev->flags) && |
7da64a0a | 3074 | rdev->badblocks.unacked_exist) { |
de393cde N |
3075 | /* metadata handler doesn't understand badblocks, |
3076 | * so we need to fail the device | |
3077 | */ | |
3078 | md_error(rdev->mddev, rdev); | |
3079 | } | |
6bfe0b49 | 3080 | clear_bit(Blocked, &rdev->flags); |
de393cde | 3081 | clear_bit(BlockedBadBlocks, &rdev->flags); |
6bfe0b49 DW |
3082 | wake_up(&rdev->blocked_wait); |
3083 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
3084 | md_wakeup_thread(rdev->mddev->thread); | |
3085 | ||
6d56e278 N |
3086 | err = 0; |
3087 | } else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) { | |
3088 | set_bit(In_sync, &rdev->flags); | |
f655675b | 3089 | err = 0; |
688834e6 N |
3090 | } else if (cmd_match(buf, "failfast")) { |
3091 | set_bit(FailFast, &rdev->flags); | |
8b9e2291 | 3092 | need_update_sb = true; |
688834e6 N |
3093 | err = 0; |
3094 | } else if (cmd_match(buf, "-failfast")) { | |
3095 | clear_bit(FailFast, &rdev->flags); | |
8b9e2291 | 3096 | need_update_sb = true; |
688834e6 | 3097 | err = 0; |
f2076e7d SL |
3098 | } else if (cmd_match(buf, "-insync") && rdev->raid_disk >= 0 && |
3099 | !test_bit(Journal, &rdev->flags)) { | |
e1960f8c N |
3100 | if (rdev->mddev->pers == NULL) { |
3101 | clear_bit(In_sync, &rdev->flags); | |
3102 | rdev->saved_raid_disk = rdev->raid_disk; | |
3103 | rdev->raid_disk = -1; | |
3104 | err = 0; | |
3105 | } | |
d7a9d443 N |
3106 | } else if (cmd_match(buf, "write_error")) { |
3107 | set_bit(WriteErrorSeen, &rdev->flags); | |
3108 | err = 0; | |
3109 | } else if (cmd_match(buf, "-write_error")) { | |
3110 | clear_bit(WriteErrorSeen, &rdev->flags); | |
3111 | err = 0; | |
2d78f8c4 N |
3112 | } else if (cmd_match(buf, "want_replacement")) { |
3113 | /* Any non-spare device that is not a replacement can | |
3114 | * become want_replacement at any time, but we then need to | |
3115 | * check if recovery is needed. | |
3116 | */ | |
3117 | if (rdev->raid_disk >= 0 && | |
f2076e7d | 3118 | !test_bit(Journal, &rdev->flags) && |
2d78f8c4 N |
3119 | !test_bit(Replacement, &rdev->flags)) |
3120 | set_bit(WantReplacement, &rdev->flags); | |
3121 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
3122 | md_wakeup_thread(rdev->mddev->thread); | |
3123 | err = 0; | |
3124 | } else if (cmd_match(buf, "-want_replacement")) { | |
3125 | /* Clearing 'want_replacement' is always allowed. | |
3126 | * Once replacements starts it is too late though. | |
3127 | */ | |
3128 | err = 0; | |
3129 | clear_bit(WantReplacement, &rdev->flags); | |
3130 | } else if (cmd_match(buf, "replacement")) { | |
3131 | /* Can only set a device as a replacement when array has not | |
3132 | * yet been started. Once running, replacement is automatic | |
3133 | * from spares, or by assigning 'slot'. | |
3134 | */ | |
3135 | if (rdev->mddev->pers) | |
3136 | err = -EBUSY; | |
3137 | else { | |
3138 | set_bit(Replacement, &rdev->flags); | |
3139 | err = 0; | |
3140 | } | |
3141 | } else if (cmd_match(buf, "-replacement")) { | |
3142 | /* Similarly, can only clear Replacement before start */ | |
3143 | if (rdev->mddev->pers) | |
3144 | err = -EBUSY; | |
3145 | else { | |
3146 | clear_bit(Replacement, &rdev->flags); | |
3147 | err = 0; | |
3148 | } | |
a6da4ef8 | 3149 | } else if (cmd_match(buf, "re-add")) { |
ee37e621 YY |
3150 | if (!rdev->mddev->pers) |
3151 | err = -EINVAL; | |
3152 | else if (test_bit(Faulty, &rdev->flags) && (rdev->raid_disk == -1) && | |
3153 | rdev->saved_raid_disk >= 0) { | |
97f6cd39 GR |
3154 | /* clear_bit is performed _after_ all the devices |
3155 | * have their local Faulty bit cleared. If any writes | |
3156 | * happen in the meantime in the local node, they | |
3157 | * will land in the local bitmap, which will be synced | |
3158 | * by this node eventually | |
3159 | */ | |
3160 | if (!mddev_is_clustered(rdev->mddev) || | |
3161 | (err = md_cluster_ops->gather_bitmaps(rdev)) == 0) { | |
3162 | clear_bit(Faulty, &rdev->flags); | |
3163 | err = add_bound_rdev(rdev); | |
3164 | } | |
a6da4ef8 GR |
3165 | } else |
3166 | err = -EBUSY; | |
35b785f7 TM |
3167 | } else if (cmd_match(buf, "external_bbl") && (rdev->mddev->external)) { |
3168 | set_bit(ExternalBbl, &rdev->flags); | |
3169 | rdev->badblocks.shift = 0; | |
3170 | err = 0; | |
3171 | } else if (cmd_match(buf, "-external_bbl") && (rdev->mddev->external)) { | |
3172 | clear_bit(ExternalBbl, &rdev->flags); | |
3173 | err = 0; | |
45dc2de1 | 3174 | } |
8b9e2291 XN |
3175 | if (need_update_sb) |
3176 | md_update_sb(mddev, 1); | |
00bcb4ac N |
3177 | if (!err) |
3178 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
45dc2de1 N |
3179 | return err ? err : len; |
3180 | } | |
80ca3a44 | 3181 | static struct rdev_sysfs_entry rdev_state = |
750f199e | 3182 | __ATTR_PREALLOC(state, S_IRUGO|S_IWUSR, state_show, state_store); |
86e6ffdd | 3183 | |
4dbcdc75 | 3184 | static ssize_t |
3cb03002 | 3185 | errors_show(struct md_rdev *rdev, char *page) |
4dbcdc75 N |
3186 | { |
3187 | return sprintf(page, "%d\n", atomic_read(&rdev->corrected_errors)); | |
3188 | } | |
3189 | ||
3190 | static ssize_t | |
3cb03002 | 3191 | errors_store(struct md_rdev *rdev, const char *buf, size_t len) |
4dbcdc75 | 3192 | { |
4c9309c0 AD |
3193 | unsigned int n; |
3194 | int rv; | |
3195 | ||
3196 | rv = kstrtouint(buf, 10, &n); | |
3197 | if (rv < 0) | |
3198 | return rv; | |
3199 | atomic_set(&rdev->corrected_errors, n); | |
3200 | return len; | |
4dbcdc75 N |
3201 | } |
3202 | static struct rdev_sysfs_entry rdev_errors = | |
80ca3a44 | 3203 | __ATTR(errors, S_IRUGO|S_IWUSR, errors_show, errors_store); |
4dbcdc75 | 3204 | |
014236d2 | 3205 | static ssize_t |
3cb03002 | 3206 | slot_show(struct md_rdev *rdev, char *page) |
014236d2 | 3207 | { |
f2076e7d SL |
3208 | if (test_bit(Journal, &rdev->flags)) |
3209 | return sprintf(page, "journal\n"); | |
3210 | else if (rdev->raid_disk < 0) | |
014236d2 N |
3211 | return sprintf(page, "none\n"); |
3212 | else | |
3213 | return sprintf(page, "%d\n", rdev->raid_disk); | |
3214 | } | |
3215 | ||
3216 | static ssize_t | |
3cb03002 | 3217 | slot_store(struct md_rdev *rdev, const char *buf, size_t len) |
014236d2 | 3218 | { |
4c9309c0 | 3219 | int slot; |
c303da6d | 3220 | int err; |
4c9309c0 | 3221 | |
f2076e7d SL |
3222 | if (test_bit(Journal, &rdev->flags)) |
3223 | return -EBUSY; | |
014236d2 N |
3224 | if (strncmp(buf, "none", 4)==0) |
3225 | slot = -1; | |
4c9309c0 AD |
3226 | else { |
3227 | err = kstrtouint(buf, 10, (unsigned int *)&slot); | |
3228 | if (err < 0) | |
3229 | return err; | |
3bc57292 N |
3230 | if (slot < 0) |
3231 | /* overflow */ | |
3232 | return -ENOSPC; | |
4c9309c0 | 3233 | } |
6c2fce2e | 3234 | if (rdev->mddev->pers && slot == -1) { |
c303da6d N |
3235 | /* Setting 'slot' on an active array requires also |
3236 | * updating the 'rd%d' link, and communicating | |
3237 | * with the personality with ->hot_*_disk. | |
3238 | * For now we only support removing | |
3239 | * failed/spare devices. This normally happens automatically, | |
3240 | * but not when the metadata is externally managed. | |
3241 | */ | |
c303da6d N |
3242 | if (rdev->raid_disk == -1) |
3243 | return -EEXIST; | |
3244 | /* personality does all needed checks */ | |
01393f3d | 3245 | if (rdev->mddev->pers->hot_remove_disk == NULL) |
c303da6d | 3246 | return -EINVAL; |
746d3207 N |
3247 | clear_bit(Blocked, &rdev->flags); |
3248 | remove_and_add_spares(rdev->mddev, rdev); | |
3249 | if (rdev->raid_disk >= 0) | |
3250 | return -EBUSY; | |
c303da6d N |
3251 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); |
3252 | md_wakeup_thread(rdev->mddev->thread); | |
6c2fce2e | 3253 | } else if (rdev->mddev->pers) { |
6c2fce2e | 3254 | /* Activating a spare .. or possibly reactivating |
6d56e278 | 3255 | * if we ever get bitmaps working here. |
6c2fce2e | 3256 | */ |
cb01c549 | 3257 | int err; |
6c2fce2e NB |
3258 | |
3259 | if (rdev->raid_disk != -1) | |
3260 | return -EBUSY; | |
3261 | ||
c6751b2b N |
3262 | if (test_bit(MD_RECOVERY_RUNNING, &rdev->mddev->recovery)) |
3263 | return -EBUSY; | |
3264 | ||
6c2fce2e NB |
3265 | if (rdev->mddev->pers->hot_add_disk == NULL) |
3266 | return -EINVAL; | |
3267 | ||
ba1b41b6 N |
3268 | if (slot >= rdev->mddev->raid_disks && |
3269 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
3270 | return -ENOSPC; | |
3271 | ||
6c2fce2e NB |
3272 | rdev->raid_disk = slot; |
3273 | if (test_bit(In_sync, &rdev->flags)) | |
3274 | rdev->saved_raid_disk = slot; | |
3275 | else | |
3276 | rdev->saved_raid_disk = -1; | |
d30519fc | 3277 | clear_bit(In_sync, &rdev->flags); |
8313b8e5 | 3278 | clear_bit(Bitmap_sync, &rdev->flags); |
3f79cc22 | 3279 | err = rdev->mddev->pers->hot_add_disk(rdev->mddev, rdev); |
cb01c549 GR |
3280 | if (err) { |
3281 | rdev->raid_disk = -1; | |
3282 | return err; | |
3283 | } else | |
3284 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
5e3b8a8d DLM |
3285 | /* failure here is OK */; |
3286 | sysfs_link_rdev(rdev->mddev, rdev); | |
6c2fce2e | 3287 | /* don't wakeup anyone, leave that to userspace. */ |
c303da6d | 3288 | } else { |
ba1b41b6 N |
3289 | if (slot >= rdev->mddev->raid_disks && |
3290 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
c303da6d N |
3291 | return -ENOSPC; |
3292 | rdev->raid_disk = slot; | |
3293 | /* assume it is working */ | |
c5d79adb N |
3294 | clear_bit(Faulty, &rdev->flags); |
3295 | clear_bit(WriteMostly, &rdev->flags); | |
c303da6d | 3296 | set_bit(In_sync, &rdev->flags); |
00bcb4ac | 3297 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
c303da6d | 3298 | } |
014236d2 N |
3299 | return len; |
3300 | } | |
3301 | ||
014236d2 | 3302 | static struct rdev_sysfs_entry rdev_slot = |
80ca3a44 | 3303 | __ATTR(slot, S_IRUGO|S_IWUSR, slot_show, slot_store); |
014236d2 | 3304 | |
93c8cad0 | 3305 | static ssize_t |
3cb03002 | 3306 | offset_show(struct md_rdev *rdev, char *page) |
93c8cad0 | 3307 | { |
6961ece4 | 3308 | return sprintf(page, "%llu\n", (unsigned long long)rdev->data_offset); |
93c8cad0 N |
3309 | } |
3310 | ||
3311 | static ssize_t | |
3cb03002 | 3312 | offset_store(struct md_rdev *rdev, const char *buf, size_t len) |
93c8cad0 | 3313 | { |
c6563a8c | 3314 | unsigned long long offset; |
b29bebd6 | 3315 | if (kstrtoull(buf, 10, &offset) < 0) |
93c8cad0 | 3316 | return -EINVAL; |
8ed0a521 | 3317 | if (rdev->mddev->pers && rdev->raid_disk >= 0) |
93c8cad0 | 3318 | return -EBUSY; |
dd8ac336 | 3319 | if (rdev->sectors && rdev->mddev->external) |
c5d79adb N |
3320 | /* Must set offset before size, so overlap checks |
3321 | * can be sane */ | |
3322 | return -EBUSY; | |
93c8cad0 | 3323 | rdev->data_offset = offset; |
25f7fd47 | 3324 | rdev->new_data_offset = offset; |
93c8cad0 N |
3325 | return len; |
3326 | } | |
3327 | ||
3328 | static struct rdev_sysfs_entry rdev_offset = | |
80ca3a44 | 3329 | __ATTR(offset, S_IRUGO|S_IWUSR, offset_show, offset_store); |
93c8cad0 | 3330 | |
c6563a8c N |
3331 | static ssize_t new_offset_show(struct md_rdev *rdev, char *page) |
3332 | { | |
3333 | return sprintf(page, "%llu\n", | |
3334 | (unsigned long long)rdev->new_data_offset); | |
3335 | } | |
3336 | ||
3337 | static ssize_t new_offset_store(struct md_rdev *rdev, | |
3338 | const char *buf, size_t len) | |
3339 | { | |
3340 | unsigned long long new_offset; | |
3341 | struct mddev *mddev = rdev->mddev; | |
3342 | ||
b29bebd6 | 3343 | if (kstrtoull(buf, 10, &new_offset) < 0) |
c6563a8c N |
3344 | return -EINVAL; |
3345 | ||
f851b60d N |
3346 | if (mddev->sync_thread || |
3347 | test_bit(MD_RECOVERY_RUNNING,&mddev->recovery)) | |
c6563a8c N |
3348 | return -EBUSY; |
3349 | if (new_offset == rdev->data_offset) | |
3350 | /* reset is always permitted */ | |
3351 | ; | |
3352 | else if (new_offset > rdev->data_offset) { | |
3353 | /* must not push array size beyond rdev_sectors */ | |
3354 | if (new_offset - rdev->data_offset | |
3355 | + mddev->dev_sectors > rdev->sectors) | |
3356 | return -E2BIG; | |
3357 | } | |
3358 | /* Metadata worries about other space details. */ | |
3359 | ||
3360 | /* decreasing the offset is inconsistent with a backwards | |
3361 | * reshape. | |
3362 | */ | |
3363 | if (new_offset < rdev->data_offset && | |
3364 | mddev->reshape_backwards) | |
3365 | return -EINVAL; | |
3366 | /* Increasing offset is inconsistent with forwards | |
3367 | * reshape. reshape_direction should be set to | |
3368 | * 'backwards' first. | |
3369 | */ | |
3370 | if (new_offset > rdev->data_offset && | |
3371 | !mddev->reshape_backwards) | |
3372 | return -EINVAL; | |
3373 | ||
3374 | if (mddev->pers && mddev->persistent && | |
3375 | !super_types[mddev->major_version] | |
3376 | .allow_new_offset(rdev, new_offset)) | |
3377 | return -E2BIG; | |
3378 | rdev->new_data_offset = new_offset; | |
3379 | if (new_offset > rdev->data_offset) | |
3380 | mddev->reshape_backwards = 1; | |
3381 | else if (new_offset < rdev->data_offset) | |
3382 | mddev->reshape_backwards = 0; | |
3383 | ||
3384 | return len; | |
3385 | } | |
3386 | static struct rdev_sysfs_entry rdev_new_offset = | |
3387 | __ATTR(new_offset, S_IRUGO|S_IWUSR, new_offset_show, new_offset_store); | |
3388 | ||
83303b61 | 3389 | static ssize_t |
3cb03002 | 3390 | rdev_size_show(struct md_rdev *rdev, char *page) |
83303b61 | 3391 | { |
dd8ac336 | 3392 | return sprintf(page, "%llu\n", (unsigned long long)rdev->sectors / 2); |
83303b61 N |
3393 | } |
3394 | ||
2652a1bd | 3395 | static int md_rdevs_overlap(struct md_rdev *a, struct md_rdev *b) |
c5d79adb N |
3396 | { |
3397 | /* check if two start/length pairs overlap */ | |
2652a1bd CH |
3398 | if (a->data_offset + a->sectors <= b->data_offset) |
3399 | return false; | |
3400 | if (b->data_offset + b->sectors <= a->data_offset) | |
3401 | return false; | |
3402 | return true; | |
3403 | } | |
3404 | ||
3405 | static bool md_rdev_overlaps(struct md_rdev *rdev) | |
3406 | { | |
3407 | struct mddev *mddev; | |
3408 | struct md_rdev *rdev2; | |
3409 | ||
3410 | spin_lock(&all_mddevs_lock); | |
3411 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) { | |
12a6caf2 CH |
3412 | if (test_bit(MD_DELETED, &mddev->flags)) |
3413 | continue; | |
2652a1bd CH |
3414 | rdev_for_each(rdev2, mddev) { |
3415 | if (rdev != rdev2 && rdev->bdev == rdev2->bdev && | |
3416 | md_rdevs_overlap(rdev, rdev2)) { | |
3417 | spin_unlock(&all_mddevs_lock); | |
3418 | return true; | |
3419 | } | |
3420 | } | |
3421 | } | |
3422 | spin_unlock(&all_mddevs_lock); | |
3423 | return false; | |
c5d79adb N |
3424 | } |
3425 | ||
b522adcd DW |
3426 | static int strict_blocks_to_sectors(const char *buf, sector_t *sectors) |
3427 | { | |
3428 | unsigned long long blocks; | |
3429 | sector_t new; | |
3430 | ||
b29bebd6 | 3431 | if (kstrtoull(buf, 10, &blocks) < 0) |
b522adcd DW |
3432 | return -EINVAL; |
3433 | ||
3434 | if (blocks & 1ULL << (8 * sizeof(blocks) - 1)) | |
3435 | return -EINVAL; /* sector conversion overflow */ | |
3436 | ||
3437 | new = blocks * 2; | |
3438 | if (new != blocks * 2) | |
3439 | return -EINVAL; /* unsigned long long to sector_t overflow */ | |
3440 | ||
3441 | *sectors = new; | |
3442 | return 0; | |
3443 | } | |
3444 | ||
83303b61 | 3445 | static ssize_t |
3cb03002 | 3446 | rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len) |
83303b61 | 3447 | { |
fd01b88c | 3448 | struct mddev *my_mddev = rdev->mddev; |
dd8ac336 | 3449 | sector_t oldsectors = rdev->sectors; |
b522adcd | 3450 | sector_t sectors; |
27c529bb | 3451 | |
f2076e7d SL |
3452 | if (test_bit(Journal, &rdev->flags)) |
3453 | return -EBUSY; | |
b522adcd | 3454 | if (strict_blocks_to_sectors(buf, §ors) < 0) |
d7027458 | 3455 | return -EINVAL; |
c6563a8c N |
3456 | if (rdev->data_offset != rdev->new_data_offset) |
3457 | return -EINVAL; /* too confusing */ | |
0cd17fec | 3458 | if (my_mddev->pers && rdev->raid_disk >= 0) { |
d7027458 | 3459 | if (my_mddev->persistent) { |
dd8ac336 AN |
3460 | sectors = super_types[my_mddev->major_version]. |
3461 | rdev_size_change(rdev, sectors); | |
3462 | if (!sectors) | |
0cd17fec | 3463 | return -EBUSY; |
dd8ac336 | 3464 | } else if (!sectors) |
0fe80347 | 3465 | sectors = bdev_nr_sectors(rdev->bdev) - |
dd8ac336 | 3466 | rdev->data_offset; |
a6468539 N |
3467 | if (!my_mddev->pers->resize) |
3468 | /* Cannot change size for RAID0 or Linear etc */ | |
3469 | return -EINVAL; | |
0cd17fec | 3470 | } |
dd8ac336 | 3471 | if (sectors < my_mddev->dev_sectors) |
7d3c6f87 | 3472 | return -EINVAL; /* component must fit device */ |
0cd17fec | 3473 | |
dd8ac336 | 3474 | rdev->sectors = sectors; |
2652a1bd CH |
3475 | |
3476 | /* | |
3477 | * Check that all other rdevs with the same bdev do not overlap. This | |
3478 | * check does not provide a hard guarantee, it just helps avoid | |
3479 | * dangerous mistakes. | |
3480 | */ | |
3481 | if (sectors > oldsectors && my_mddev->external && | |
3482 | md_rdev_overlaps(rdev)) { | |
3483 | /* | |
3484 | * Someone else could have slipped in a size change here, but | |
3485 | * doing so is just silly. We put oldsectors back because we | |
3486 | * know it is safe, and trust userspace not to race with itself. | |
c5d79adb | 3487 | */ |
2652a1bd CH |
3488 | rdev->sectors = oldsectors; |
3489 | return -EBUSY; | |
c5d79adb | 3490 | } |
83303b61 N |
3491 | return len; |
3492 | } | |
3493 | ||
3494 | static struct rdev_sysfs_entry rdev_size = | |
80ca3a44 | 3495 | __ATTR(size, S_IRUGO|S_IWUSR, rdev_size_show, rdev_size_store); |
83303b61 | 3496 | |
3cb03002 | 3497 | static ssize_t recovery_start_show(struct md_rdev *rdev, char *page) |
06e3c817 DW |
3498 | { |
3499 | unsigned long long recovery_start = rdev->recovery_offset; | |
3500 | ||
3501 | if (test_bit(In_sync, &rdev->flags) || | |
3502 | recovery_start == MaxSector) | |
3503 | return sprintf(page, "none\n"); | |
3504 | ||
3505 | return sprintf(page, "%llu\n", recovery_start); | |
3506 | } | |
3507 | ||
3cb03002 | 3508 | static ssize_t recovery_start_store(struct md_rdev *rdev, const char *buf, size_t len) |
06e3c817 DW |
3509 | { |
3510 | unsigned long long recovery_start; | |
3511 | ||
3512 | if (cmd_match(buf, "none")) | |
3513 | recovery_start = MaxSector; | |
b29bebd6 | 3514 | else if (kstrtoull(buf, 10, &recovery_start)) |
06e3c817 DW |
3515 | return -EINVAL; |
3516 | ||
3517 | if (rdev->mddev->pers && | |
3518 | rdev->raid_disk >= 0) | |
3519 | return -EBUSY; | |
3520 | ||
3521 | rdev->recovery_offset = recovery_start; | |
3522 | if (recovery_start == MaxSector) | |
3523 | set_bit(In_sync, &rdev->flags); | |
3524 | else | |
3525 | clear_bit(In_sync, &rdev->flags); | |
3526 | return len; | |
3527 | } | |
3528 | ||
3529 | static struct rdev_sysfs_entry rdev_recovery_start = | |
3530 | __ATTR(recovery_start, S_IRUGO|S_IWUSR, recovery_start_show, recovery_start_store); | |
3531 | ||
fc974ee2 VV |
3532 | /* sysfs access to bad-blocks list. |
3533 | * We present two files. | |
3534 | * 'bad-blocks' lists sector numbers and lengths of ranges that | |
3535 | * are recorded as bad. The list is truncated to fit within | |
3536 | * the one-page limit of sysfs. | |
3537 | * Writing "sector length" to this file adds an acknowledged | |
3538 | * bad block list. | |
3539 | * 'unacknowledged-bad-blocks' lists bad blocks that have not yet | |
3540 | * been acknowledged. Writing to this file adds bad blocks | |
3541 | * without acknowledging them. This is largely for testing. | |
3542 | */ | |
3cb03002 | 3543 | static ssize_t bb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3544 | { |
3545 | return badblocks_show(&rdev->badblocks, page, 0); | |
3546 | } | |
3cb03002 | 3547 | static ssize_t bb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 | 3548 | { |
de393cde N |
3549 | int rv = badblocks_store(&rdev->badblocks, page, len, 0); |
3550 | /* Maybe that ack was all we needed */ | |
3551 | if (test_and_clear_bit(BlockedBadBlocks, &rdev->flags)) | |
3552 | wake_up(&rdev->blocked_wait); | |
3553 | return rv; | |
16c791a5 N |
3554 | } |
3555 | static struct rdev_sysfs_entry rdev_bad_blocks = | |
3556 | __ATTR(bad_blocks, S_IRUGO|S_IWUSR, bb_show, bb_store); | |
3557 | ||
3cb03002 | 3558 | static ssize_t ubb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3559 | { |
3560 | return badblocks_show(&rdev->badblocks, page, 1); | |
3561 | } | |
3cb03002 | 3562 | static ssize_t ubb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 N |
3563 | { |
3564 | return badblocks_store(&rdev->badblocks, page, len, 1); | |
3565 | } | |
3566 | static struct rdev_sysfs_entry rdev_unack_bad_blocks = | |
3567 | __ATTR(unacknowledged_bad_blocks, S_IRUGO|S_IWUSR, ubb_show, ubb_store); | |
3568 | ||
664aed04 AP |
3569 | static ssize_t |
3570 | ppl_sector_show(struct md_rdev *rdev, char *page) | |
3571 | { | |
3572 | return sprintf(page, "%llu\n", (unsigned long long)rdev->ppl.sector); | |
3573 | } | |
3574 | ||
3575 | static ssize_t | |
3576 | ppl_sector_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3577 | { | |
3578 | unsigned long long sector; | |
3579 | ||
3580 | if (kstrtoull(buf, 10, §or) < 0) | |
3581 | return -EINVAL; | |
3582 | if (sector != (sector_t)sector) | |
3583 | return -EINVAL; | |
3584 | ||
3585 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3586 | rdev->raid_disk >= 0) | |
3587 | return -EBUSY; | |
3588 | ||
3589 | if (rdev->mddev->persistent) { | |
3590 | if (rdev->mddev->major_version == 0) | |
3591 | return -EINVAL; | |
3592 | if ((sector > rdev->sb_start && | |
3593 | sector - rdev->sb_start > S16_MAX) || | |
3594 | (sector < rdev->sb_start && | |
3595 | rdev->sb_start - sector > -S16_MIN)) | |
3596 | return -EINVAL; | |
3597 | rdev->ppl.offset = sector - rdev->sb_start; | |
3598 | } else if (!rdev->mddev->external) { | |
3599 | return -EBUSY; | |
3600 | } | |
3601 | rdev->ppl.sector = sector; | |
3602 | return len; | |
3603 | } | |
3604 | ||
3605 | static struct rdev_sysfs_entry rdev_ppl_sector = | |
3606 | __ATTR(ppl_sector, S_IRUGO|S_IWUSR, ppl_sector_show, ppl_sector_store); | |
3607 | ||
3608 | static ssize_t | |
3609 | ppl_size_show(struct md_rdev *rdev, char *page) | |
3610 | { | |
3611 | return sprintf(page, "%u\n", rdev->ppl.size); | |
3612 | } | |
3613 | ||
3614 | static ssize_t | |
3615 | ppl_size_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3616 | { | |
3617 | unsigned int size; | |
3618 | ||
3619 | if (kstrtouint(buf, 10, &size) < 0) | |
3620 | return -EINVAL; | |
3621 | ||
3622 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3623 | rdev->raid_disk >= 0) | |
3624 | return -EBUSY; | |
3625 | ||
3626 | if (rdev->mddev->persistent) { | |
3627 | if (rdev->mddev->major_version == 0) | |
3628 | return -EINVAL; | |
3629 | if (size > U16_MAX) | |
3630 | return -EINVAL; | |
3631 | } else if (!rdev->mddev->external) { | |
3632 | return -EBUSY; | |
3633 | } | |
3634 | rdev->ppl.size = size; | |
3635 | return len; | |
3636 | } | |
3637 | ||
3638 | static struct rdev_sysfs_entry rdev_ppl_size = | |
3639 | __ATTR(ppl_size, S_IRUGO|S_IWUSR, ppl_size_show, ppl_size_store); | |
3640 | ||
86e6ffdd N |
3641 | static struct attribute *rdev_default_attrs[] = { |
3642 | &rdev_state.attr, | |
4dbcdc75 | 3643 | &rdev_errors.attr, |
014236d2 | 3644 | &rdev_slot.attr, |
93c8cad0 | 3645 | &rdev_offset.attr, |
c6563a8c | 3646 | &rdev_new_offset.attr, |
83303b61 | 3647 | &rdev_size.attr, |
06e3c817 | 3648 | &rdev_recovery_start.attr, |
16c791a5 N |
3649 | &rdev_bad_blocks.attr, |
3650 | &rdev_unack_bad_blocks.attr, | |
664aed04 AP |
3651 | &rdev_ppl_sector.attr, |
3652 | &rdev_ppl_size.attr, | |
86e6ffdd N |
3653 | NULL, |
3654 | }; | |
1745e857 | 3655 | ATTRIBUTE_GROUPS(rdev_default); |
86e6ffdd N |
3656 | static ssize_t |
3657 | rdev_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
3658 | { | |
3659 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3660 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
86e6ffdd N |
3661 | |
3662 | if (!entry->show) | |
3663 | return -EIO; | |
758bfc8a | 3664 | if (!rdev->mddev) |
168b305b | 3665 | return -ENODEV; |
758bfc8a | 3666 | return entry->show(rdev, page); |
86e6ffdd N |
3667 | } |
3668 | ||
3669 | static ssize_t | |
3670 | rdev_attr_store(struct kobject *kobj, struct attribute *attr, | |
3671 | const char *page, size_t length) | |
3672 | { | |
3673 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3674 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
3ce94ce5 | 3675 | struct kernfs_node *kn = NULL; |
cfa078c8 | 3676 | bool suspend = false; |
27c529bb | 3677 | ssize_t rv; |
fd01b88c | 3678 | struct mddev *mddev = rdev->mddev; |
86e6ffdd N |
3679 | |
3680 | if (!entry->store) | |
3681 | return -EIO; | |
67463acb N |
3682 | if (!capable(CAP_SYS_ADMIN)) |
3683 | return -EACCES; | |
cfa078c8 YK |
3684 | if (!mddev) |
3685 | return -ENODEV; | |
3ce94ce5 | 3686 | |
cfa078c8 YK |
3687 | if (entry->store == state_store) { |
3688 | if (cmd_match(page, "remove")) | |
3689 | kn = sysfs_break_active_protection(kobj, attr); | |
58226942 YK |
3690 | if (cmd_match(page, "remove") || cmd_match(page, "re-add") || |
3691 | cmd_match(page, "writemostly") || | |
3692 | cmd_match(page, "-writemostly")) | |
cfa078c8 YK |
3693 | suspend = true; |
3694 | } | |
3ce94ce5 | 3695 | |
cfa078c8 | 3696 | rv = suspend ? mddev_suspend_and_lock(mddev) : mddev_lock(mddev); |
ca388059 | 3697 | if (!rv) { |
27c529bb | 3698 | if (rdev->mddev == NULL) |
c42d3240 | 3699 | rv = -ENODEV; |
27c529bb N |
3700 | else |
3701 | rv = entry->store(rdev, page, length); | |
cfa078c8 | 3702 | suspend ? mddev_unlock_and_resume(mddev) : mddev_unlock(mddev); |
ca388059 | 3703 | } |
3ce94ce5 YK |
3704 | |
3705 | if (kn) | |
3706 | sysfs_unbreak_active_protection(kn); | |
3707 | ||
ca388059 | 3708 | return rv; |
86e6ffdd N |
3709 | } |
3710 | ||
3711 | static void rdev_free(struct kobject *ko) | |
3712 | { | |
3cb03002 | 3713 | struct md_rdev *rdev = container_of(ko, struct md_rdev, kobj); |
86e6ffdd N |
3714 | kfree(rdev); |
3715 | } | |
52cf25d0 | 3716 | static const struct sysfs_ops rdev_sysfs_ops = { |
86e6ffdd N |
3717 | .show = rdev_attr_show, |
3718 | .store = rdev_attr_store, | |
3719 | }; | |
4d72a9de | 3720 | static const struct kobj_type rdev_ktype = { |
86e6ffdd N |
3721 | .release = rdev_free, |
3722 | .sysfs_ops = &rdev_sysfs_ops, | |
1745e857 | 3723 | .default_groups = rdev_default_groups, |
86e6ffdd N |
3724 | }; |
3725 | ||
3cb03002 | 3726 | int md_rdev_init(struct md_rdev *rdev) |
e8bb9a83 N |
3727 | { |
3728 | rdev->desc_nr = -1; | |
3729 | rdev->saved_raid_disk = -1; | |
3730 | rdev->raid_disk = -1; | |
3731 | rdev->flags = 0; | |
3732 | rdev->data_offset = 0; | |
c6563a8c | 3733 | rdev->new_data_offset = 0; |
e8bb9a83 | 3734 | rdev->sb_events = 0; |
0e3ef49e | 3735 | rdev->last_read_error = 0; |
2699b672 N |
3736 | rdev->sb_loaded = 0; |
3737 | rdev->bb_page = NULL; | |
e8bb9a83 N |
3738 | atomic_set(&rdev->nr_pending, 0); |
3739 | atomic_set(&rdev->read_errors, 0); | |
3740 | atomic_set(&rdev->corrected_errors, 0); | |
3741 | ||
3742 | INIT_LIST_HEAD(&rdev->same_set); | |
3743 | init_waitqueue_head(&rdev->blocked_wait); | |
2230dfe4 N |
3744 | |
3745 | /* Add space to store bad block list. | |
3746 | * This reserves the space even on arrays where it cannot | |
3747 | * be used - I wonder if that matters | |
3748 | */ | |
fc974ee2 | 3749 | return badblocks_init(&rdev->badblocks, 0); |
e8bb9a83 N |
3750 | } |
3751 | EXPORT_SYMBOL_GPL(md_rdev_init); | |
2736e8ee | 3752 | |
1da177e4 LT |
3753 | /* |
3754 | * Import a device. If 'super_format' >= 0, then sanity check the superblock | |
3755 | * | |
3756 | * mark the device faulty if: | |
3757 | * | |
3758 | * - the device is nonexistent (zero size) | |
3759 | * - the device has no valid superblock | |
3760 | * | |
3761 | * a faulty rdev _never_ has rdev->sb set. | |
3762 | */ | |
3cb03002 | 3763 | static struct md_rdev *md_import_device(dev_t newdev, int super_format, int super_minor) |
1da177e4 | 3764 | { |
3cb03002 | 3765 | struct md_rdev *rdev; |
1da177e4 | 3766 | sector_t size; |
fb541ca4 | 3767 | int err; |
1da177e4 | 3768 | |
9ffae0cf | 3769 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
9d48739e | 3770 | if (!rdev) |
1da177e4 | 3771 | return ERR_PTR(-ENOMEM); |
1da177e4 | 3772 | |
2230dfe4 N |
3773 | err = md_rdev_init(rdev); |
3774 | if (err) | |
fb541ca4 | 3775 | goto out_free_rdev; |
2230dfe4 N |
3776 | err = alloc_disk_sb(rdev); |
3777 | if (err) | |
fb541ca4 | 3778 | goto out_clear_rdev; |
1da177e4 | 3779 | |
9f0f5a30 JK |
3780 | rdev->bdev_handle = bdev_open_by_dev(newdev, |
3781 | BLK_OPEN_READ | BLK_OPEN_WRITE, | |
3782 | super_format == -2 ? &claim_rdev : rdev, NULL); | |
3783 | if (IS_ERR(rdev->bdev_handle)) { | |
fb541ca4 CH |
3784 | pr_warn("md: could not open device unknown-block(%u,%u).\n", |
3785 | MAJOR(newdev), MINOR(newdev)); | |
9f0f5a30 | 3786 | err = PTR_ERR(rdev->bdev_handle); |
fb541ca4 CH |
3787 | goto out_clear_rdev; |
3788 | } | |
9f0f5a30 | 3789 | rdev->bdev = rdev->bdev_handle->bdev; |
1da177e4 | 3790 | |
f9cb074b | 3791 | kobject_init(&rdev->kobj, &rdev_ktype); |
86e6ffdd | 3792 | |
0fe80347 | 3793 | size = bdev_nr_bytes(rdev->bdev) >> BLOCK_SIZE_BITS; |
1da177e4 | 3794 | if (!size) { |
913cce5a CH |
3795 | pr_warn("md: %pg has zero or unknown size, marking faulty!\n", |
3796 | rdev->bdev); | |
1da177e4 | 3797 | err = -EINVAL; |
fb541ca4 | 3798 | goto out_blkdev_put; |
1da177e4 LT |
3799 | } |
3800 | ||
3801 | if (super_format >= 0) { | |
3802 | err = super_types[super_format]. | |
3803 | load_super(rdev, NULL, super_minor); | |
3804 | if (err == -EINVAL) { | |
913cce5a CH |
3805 | pr_warn("md: %pg does not have a valid v%d.%d superblock, not importing!\n", |
3806 | rdev->bdev, | |
9d48739e | 3807 | super_format, super_minor); |
fb541ca4 | 3808 | goto out_blkdev_put; |
1da177e4 LT |
3809 | } |
3810 | if (err < 0) { | |
913cce5a CH |
3811 | pr_warn("md: could not read %pg's sb, not importing!\n", |
3812 | rdev->bdev); | |
fb541ca4 | 3813 | goto out_blkdev_put; |
1da177e4 LT |
3814 | } |
3815 | } | |
6bfe0b49 | 3816 | |
1da177e4 LT |
3817 | return rdev; |
3818 | ||
fb541ca4 | 3819 | out_blkdev_put: |
9f0f5a30 | 3820 | bdev_release(rdev->bdev_handle); |
fb541ca4 | 3821 | out_clear_rdev: |
545c8795 | 3822 | md_rdev_clear(rdev); |
fb541ca4 | 3823 | out_free_rdev: |
1da177e4 LT |
3824 | kfree(rdev); |
3825 | return ERR_PTR(err); | |
3826 | } | |
3827 | ||
3828 | /* | |
3829 | * Check a full RAID array for plausibility | |
3830 | */ | |
3831 | ||
6a5cb53a | 3832 | static int analyze_sbs(struct mddev *mddev) |
1da177e4 LT |
3833 | { |
3834 | int i; | |
3cb03002 | 3835 | struct md_rdev *rdev, *freshest, *tmp; |
1da177e4 LT |
3836 | |
3837 | freshest = NULL; | |
dafb20fa | 3838 | rdev_for_each_safe(rdev, tmp, mddev) |
1da177e4 LT |
3839 | switch (super_types[mddev->major_version]. |
3840 | load_super(rdev, freshest, mddev->minor_version)) { | |
3841 | case 1: | |
3842 | freshest = rdev; | |
3843 | break; | |
3844 | case 0: | |
3845 | break; | |
3846 | default: | |
913cce5a CH |
3847 | pr_warn("md: fatal superblock inconsistency in %pg -- removing from array\n", |
3848 | rdev->bdev); | |
fb56dfef | 3849 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3850 | } |
3851 | ||
6a5cb53a YY |
3852 | /* Cannot find a valid fresh disk */ |
3853 | if (!freshest) { | |
3854 | pr_warn("md: cannot find a valid disk\n"); | |
3855 | return -EINVAL; | |
3856 | } | |
3857 | ||
1da177e4 | 3858 | super_types[mddev->major_version]. |
dc1cc22e | 3859 | validate_super(mddev, NULL/*freshest*/, freshest); |
1da177e4 LT |
3860 | |
3861 | i = 0; | |
dafb20fa | 3862 | rdev_for_each_safe(rdev, tmp, mddev) { |
233fca36 N |
3863 | if (mddev->max_disks && |
3864 | (rdev->desc_nr >= mddev->max_disks || | |
3865 | i > mddev->max_disks)) { | |
913cce5a CH |
3866 | pr_warn("md: %s: %pg: only %d devices permitted\n", |
3867 | mdname(mddev), rdev->bdev, | |
9d48739e | 3868 | mddev->max_disks); |
fb56dfef | 3869 | md_kick_rdev_from_array(rdev); |
de01dfad N |
3870 | continue; |
3871 | } | |
1aee41f6 | 3872 | if (rdev != freshest) { |
1da177e4 | 3873 | if (super_types[mddev->major_version]. |
dc1cc22e | 3874 | validate_super(mddev, freshest, rdev)) { |
913cce5a CH |
3875 | pr_warn("md: kicking non-fresh %pg from array!\n", |
3876 | rdev->bdev); | |
fb56dfef | 3877 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3878 | continue; |
3879 | } | |
1aee41f6 | 3880 | } |
d8730f0c SL |
3881 | if (rdev->raid_disk >= (mddev->raid_disks - min(0, mddev->delta_disks)) && |
3882 | !test_bit(Journal, &rdev->flags)) { | |
a778b73f N |
3883 | rdev->raid_disk = -1; |
3884 | clear_bit(In_sync, &rdev->flags); | |
1da177e4 LT |
3885 | } |
3886 | } | |
6a5cb53a YY |
3887 | |
3888 | return 0; | |
1da177e4 LT |
3889 | } |
3890 | ||
72e02075 N |
3891 | /* Read a fixed-point number. |
3892 | * Numbers in sysfs attributes should be in "standard" units where | |
3893 | * possible, so time should be in seconds. | |
f72ffdd6 | 3894 | * However we internally use a a much smaller unit such as |
72e02075 N |
3895 | * milliseconds or jiffies. |
3896 | * This function takes a decimal number with a possible fractional | |
3897 | * component, and produces an integer which is the result of | |
3898 | * multiplying that number by 10^'scale'. | |
3899 | * all without any floating-point arithmetic. | |
3900 | */ | |
3901 | int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale) | |
3902 | { | |
3903 | unsigned long result = 0; | |
3904 | long decimals = -1; | |
3905 | while (isdigit(*cp) || (*cp == '.' && decimals < 0)) { | |
3906 | if (*cp == '.') | |
3907 | decimals = 0; | |
3908 | else if (decimals < scale) { | |
3909 | unsigned int value; | |
3910 | value = *cp - '0'; | |
3911 | result = result * 10 + value; | |
3912 | if (decimals >= 0) | |
3913 | decimals++; | |
3914 | } | |
3915 | cp++; | |
3916 | } | |
3917 | if (*cp == '\n') | |
3918 | cp++; | |
3919 | if (*cp) | |
3920 | return -EINVAL; | |
3921 | if (decimals < 0) | |
3922 | decimals = 0; | |
cf891607 | 3923 | *res = result * int_pow(10, scale - decimals); |
72e02075 N |
3924 | return 0; |
3925 | } | |
3926 | ||
16f17b39 | 3927 | static ssize_t |
fd01b88c | 3928 | safe_delay_show(struct mddev *mddev, char *page) |
16f17b39 | 3929 | { |
6beb489b LN |
3930 | unsigned int msec = ((unsigned long)mddev->safemode_delay*1000)/HZ; |
3931 | ||
3932 | return sprintf(page, "%u.%03u\n", msec/1000, msec%1000); | |
16f17b39 N |
3933 | } |
3934 | static ssize_t | |
fd01b88c | 3935 | safe_delay_store(struct mddev *mddev, const char *cbuf, size_t len) |
16f17b39 | 3936 | { |
16f17b39 | 3937 | unsigned long msec; |
97ce0a7f | 3938 | |
28c1b9fd | 3939 | if (mddev_is_clustered(mddev)) { |
9d48739e | 3940 | pr_warn("md: Safemode is disabled for clustered mode\n"); |
28c1b9fd GR |
3941 | return -EINVAL; |
3942 | } | |
3943 | ||
6beb489b | 3944 | if (strict_strtoul_scaled(cbuf, &msec, 3) < 0 || msec > UINT_MAX / HZ) |
16f17b39 | 3945 | return -EINVAL; |
16f17b39 N |
3946 | if (msec == 0) |
3947 | mddev->safemode_delay = 0; | |
3948 | else { | |
19052c0e | 3949 | unsigned long old_delay = mddev->safemode_delay; |
1b30e66f N |
3950 | unsigned long new_delay = (msec*HZ)/1000; |
3951 | ||
3952 | if (new_delay == 0) | |
3953 | new_delay = 1; | |
3954 | mddev->safemode_delay = new_delay; | |
3955 | if (new_delay < old_delay || old_delay == 0) | |
3956 | mod_timer(&mddev->safemode_timer, jiffies+1); | |
16f17b39 N |
3957 | } |
3958 | return len; | |
3959 | } | |
3960 | static struct md_sysfs_entry md_safe_delay = | |
80ca3a44 | 3961 | __ATTR(safe_mode_delay, S_IRUGO|S_IWUSR,safe_delay_show, safe_delay_store); |
16f17b39 | 3962 | |
eae1701f | 3963 | static ssize_t |
fd01b88c | 3964 | level_show(struct mddev *mddev, char *page) |
eae1701f | 3965 | { |
36d091f4 N |
3966 | struct md_personality *p; |
3967 | int ret; | |
3968 | spin_lock(&mddev->lock); | |
3969 | p = mddev->pers; | |
d9d166c2 | 3970 | if (p) |
36d091f4 | 3971 | ret = sprintf(page, "%s\n", p->name); |
d9d166c2 | 3972 | else if (mddev->clevel[0]) |
36d091f4 | 3973 | ret = sprintf(page, "%s\n", mddev->clevel); |
d9d166c2 | 3974 | else if (mddev->level != LEVEL_NONE) |
36d091f4 | 3975 | ret = sprintf(page, "%d\n", mddev->level); |
d9d166c2 | 3976 | else |
36d091f4 N |
3977 | ret = 0; |
3978 | spin_unlock(&mddev->lock); | |
3979 | return ret; | |
eae1701f N |
3980 | } |
3981 | ||
d9d166c2 | 3982 | static ssize_t |
fd01b88c | 3983 | level_store(struct mddev *mddev, const char *buf, size_t len) |
d9d166c2 | 3984 | { |
f2859af6 | 3985 | char clevel[16]; |
6791875e N |
3986 | ssize_t rv; |
3987 | size_t slen = len; | |
db721d32 | 3988 | struct md_personality *pers, *oldpers; |
f2859af6 | 3989 | long level; |
db721d32 | 3990 | void *priv, *oldpriv; |
3cb03002 | 3991 | struct md_rdev *rdev; |
245f46c2 | 3992 | |
6791875e N |
3993 | if (slen == 0 || slen >= sizeof(clevel)) |
3994 | return -EINVAL; | |
3995 | ||
205669f3 | 3996 | rv = mddev_suspend_and_lock(mddev); |
6791875e N |
3997 | if (rv) |
3998 | return rv; | |
3999 | ||
245f46c2 | 4000 | if (mddev->pers == NULL) { |
ceb04163 | 4001 | memcpy(mddev->clevel, buf, slen); |
6791875e N |
4002 | if (mddev->clevel[slen-1] == '\n') |
4003 | slen--; | |
4004 | mddev->clevel[slen] = 0; | |
245f46c2 | 4005 | mddev->level = LEVEL_NONE; |
6791875e N |
4006 | rv = len; |
4007 | goto out_unlock; | |
245f46c2 | 4008 | } |
6791875e | 4009 | rv = -EROFS; |
f97a5528 | 4010 | if (!md_is_rdwr(mddev)) |
6791875e | 4011 | goto out_unlock; |
245f46c2 N |
4012 | |
4013 | /* request to change the personality. Need to ensure: | |
4014 | * - array is not engaged in resync/recovery/reshape | |
4015 | * - old personality can be suspended | |
4016 | * - new personality will access other array. | |
4017 | */ | |
4018 | ||
6791875e | 4019 | rv = -EBUSY; |
bb4f1e9d | 4020 | if (mddev->sync_thread || |
f851b60d | 4021 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
bb4f1e9d N |
4022 | mddev->reshape_position != MaxSector || |
4023 | mddev->sysfs_active) | |
6791875e | 4024 | goto out_unlock; |
245f46c2 | 4025 | |
6791875e | 4026 | rv = -EINVAL; |
245f46c2 | 4027 | if (!mddev->pers->quiesce) { |
9d48739e N |
4028 | pr_warn("md: %s: %s does not support online personality change\n", |
4029 | mdname(mddev), mddev->pers->name); | |
6791875e | 4030 | goto out_unlock; |
245f46c2 N |
4031 | } |
4032 | ||
4033 | /* Now find the new personality */ | |
ceb04163 | 4034 | memcpy(clevel, buf, slen); |
6791875e N |
4035 | if (clevel[slen-1] == '\n') |
4036 | slen--; | |
4037 | clevel[slen] = 0; | |
b29bebd6 | 4038 | if (kstrtol(clevel, 10, &level)) |
f2859af6 | 4039 | level = LEVEL_NONE; |
245f46c2 | 4040 | |
f2859af6 DW |
4041 | if (request_module("md-%s", clevel) != 0) |
4042 | request_module("md-level-%s", clevel); | |
245f46c2 | 4043 | spin_lock(&pers_lock); |
f2859af6 | 4044 | pers = find_pers(level, clevel); |
245f46c2 N |
4045 | if (!pers || !try_module_get(pers->owner)) { |
4046 | spin_unlock(&pers_lock); | |
9d48739e | 4047 | pr_warn("md: personality %s not loaded\n", clevel); |
6791875e N |
4048 | rv = -EINVAL; |
4049 | goto out_unlock; | |
245f46c2 N |
4050 | } |
4051 | spin_unlock(&pers_lock); | |
4052 | ||
4053 | if (pers == mddev->pers) { | |
4054 | /* Nothing to do! */ | |
4055 | module_put(pers->owner); | |
6791875e N |
4056 | rv = len; |
4057 | goto out_unlock; | |
245f46c2 N |
4058 | } |
4059 | if (!pers->takeover) { | |
4060 | module_put(pers->owner); | |
9d48739e N |
4061 | pr_warn("md: %s: %s does not support personality takeover\n", |
4062 | mdname(mddev), clevel); | |
6791875e N |
4063 | rv = -EINVAL; |
4064 | goto out_unlock; | |
245f46c2 N |
4065 | } |
4066 | ||
dafb20fa | 4067 | rdev_for_each(rdev, mddev) |
e93f68a1 N |
4068 | rdev->new_raid_disk = rdev->raid_disk; |
4069 | ||
245f46c2 N |
4070 | /* ->takeover must set new_* and/or delta_disks |
4071 | * if it succeeds, and may set them when it fails. | |
4072 | */ | |
4073 | priv = pers->takeover(mddev); | |
4074 | if (IS_ERR(priv)) { | |
4075 | mddev->new_level = mddev->level; | |
4076 | mddev->new_layout = mddev->layout; | |
664e7c41 | 4077 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
245f46c2 N |
4078 | mddev->raid_disks -= mddev->delta_disks; |
4079 | mddev->delta_disks = 0; | |
2c810cdd | 4080 | mddev->reshape_backwards = 0; |
245f46c2 | 4081 | module_put(pers->owner); |
9d48739e N |
4082 | pr_warn("md: %s: %s would not accept array\n", |
4083 | mdname(mddev), clevel); | |
6791875e N |
4084 | rv = PTR_ERR(priv); |
4085 | goto out_unlock; | |
245f46c2 N |
4086 | } |
4087 | ||
4088 | /* Looks like we have a winner */ | |
5aa61f42 | 4089 | mddev_detach(mddev); |
36d091f4 N |
4090 | |
4091 | spin_lock(&mddev->lock); | |
db721d32 N |
4092 | oldpers = mddev->pers; |
4093 | oldpriv = mddev->private; | |
4094 | mddev->pers = pers; | |
4095 | mddev->private = priv; | |
92d9aac9 | 4096 | strscpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
db721d32 N |
4097 | mddev->level = mddev->new_level; |
4098 | mddev->layout = mddev->new_layout; | |
4099 | mddev->chunk_sectors = mddev->new_chunk_sectors; | |
4100 | mddev->delta_disks = 0; | |
4101 | mddev->reshape_backwards = 0; | |
4102 | mddev->degraded = 0; | |
36d091f4 | 4103 | spin_unlock(&mddev->lock); |
db721d32 N |
4104 | |
4105 | if (oldpers->sync_request == NULL && | |
4106 | mddev->external) { | |
4107 | /* We are converting from a no-redundancy array | |
4108 | * to a redundancy array and metadata is managed | |
4109 | * externally so we need to be sure that writes | |
4110 | * won't block due to a need to transition | |
4111 | * clean->dirty | |
4112 | * until external management is started. | |
4113 | */ | |
4114 | mddev->in_sync = 0; | |
4115 | mddev->safemode_delay = 0; | |
4116 | mddev->safemode = 0; | |
4117 | } | |
f72ffdd6 | 4118 | |
db721d32 N |
4119 | oldpers->free(mddev, oldpriv); |
4120 | ||
4121 | if (oldpers->sync_request == NULL && | |
a64c876f N |
4122 | pers->sync_request != NULL) { |
4123 | /* need to add the md_redundancy_group */ | |
4124 | if (sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
4125 | pr_warn("md: cannot register extra attributes for %s\n", |
4126 | mdname(mddev)); | |
388975cc | 4127 | mddev->sysfs_action = sysfs_get_dirent(mddev->kobj.sd, "sync_action"); |
e8efa9b8 JB |
4128 | mddev->sysfs_completed = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_completed"); |
4129 | mddev->sysfs_degraded = sysfs_get_dirent_safe(mddev->kobj.sd, "degraded"); | |
f72ffdd6 | 4130 | } |
db721d32 | 4131 | if (oldpers->sync_request != NULL && |
a64c876f N |
4132 | pers->sync_request == NULL) { |
4133 | /* need to remove the md_redundancy_group */ | |
4134 | if (mddev->to_remove == NULL) | |
4135 | mddev->to_remove = &md_redundancy_group; | |
4136 | } | |
4137 | ||
4cb9da7d AO |
4138 | module_put(oldpers->owner); |
4139 | ||
dafb20fa | 4140 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
4141 | if (rdev->raid_disk < 0) |
4142 | continue; | |
bf2cb0da | 4143 | if (rdev->new_raid_disk >= mddev->raid_disks) |
e93f68a1 N |
4144 | rdev->new_raid_disk = -1; |
4145 | if (rdev->new_raid_disk == rdev->raid_disk) | |
4146 | continue; | |
36fad858 | 4147 | sysfs_unlink_rdev(mddev, rdev); |
e93f68a1 | 4148 | } |
dafb20fa | 4149 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
4150 | if (rdev->raid_disk < 0) |
4151 | continue; | |
4152 | if (rdev->new_raid_disk == rdev->raid_disk) | |
4153 | continue; | |
4154 | rdev->raid_disk = rdev->new_raid_disk; | |
4155 | if (rdev->raid_disk < 0) | |
3a981b03 | 4156 | clear_bit(In_sync, &rdev->flags); |
e93f68a1 | 4157 | else { |
36fad858 | 4158 | if (sysfs_link_rdev(mddev, rdev)) |
9d48739e N |
4159 | pr_warn("md: cannot register rd%d for %s after level change\n", |
4160 | rdev->raid_disk, mdname(mddev)); | |
3a981b03 | 4161 | } |
e93f68a1 N |
4162 | } |
4163 | ||
db721d32 | 4164 | if (pers->sync_request == NULL) { |
9af204cf TM |
4165 | /* this is now an array without redundancy, so |
4166 | * it must always be in_sync | |
4167 | */ | |
4168 | mddev->in_sync = 1; | |
4169 | del_timer_sync(&mddev->safemode_timer); | |
4170 | } | |
02e5f5c0 | 4171 | blk_set_stacking_limits(&mddev->queue->limits); |
245f46c2 | 4172 | pers->run(mddev); |
2953079c | 4173 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
830778a1 N |
4174 | if (!mddev->thread) |
4175 | md_update_sb(mddev, 1); | |
e1a86dbb | 4176 | sysfs_notify_dirent_safe(mddev->sysfs_level); |
54679486 | 4177 | md_new_event(); |
6791875e N |
4178 | rv = len; |
4179 | out_unlock: | |
205669f3 | 4180 | mddev_unlock_and_resume(mddev); |
d9d166c2 N |
4181 | return rv; |
4182 | } | |
4183 | ||
4184 | static struct md_sysfs_entry md_level = | |
80ca3a44 | 4185 | __ATTR(level, S_IRUGO|S_IWUSR, level_show, level_store); |
eae1701f | 4186 | |
d4dbd025 | 4187 | static ssize_t |
fd01b88c | 4188 | layout_show(struct mddev *mddev, char *page) |
d4dbd025 N |
4189 | { |
4190 | /* just a number, not meaningful for all levels */ | |
08a02ecd N |
4191 | if (mddev->reshape_position != MaxSector && |
4192 | mddev->layout != mddev->new_layout) | |
4193 | return sprintf(page, "%d (%d)\n", | |
4194 | mddev->new_layout, mddev->layout); | |
d4dbd025 N |
4195 | return sprintf(page, "%d\n", mddev->layout); |
4196 | } | |
4197 | ||
4198 | static ssize_t | |
fd01b88c | 4199 | layout_store(struct mddev *mddev, const char *buf, size_t len) |
d4dbd025 | 4200 | { |
4c9309c0 | 4201 | unsigned int n; |
6791875e | 4202 | int err; |
d4dbd025 | 4203 | |
4c9309c0 AD |
4204 | err = kstrtouint(buf, 10, &n); |
4205 | if (err < 0) | |
4206 | return err; | |
6791875e N |
4207 | err = mddev_lock(mddev); |
4208 | if (err) | |
4209 | return err; | |
d4dbd025 | 4210 | |
b3546035 | 4211 | if (mddev->pers) { |
50ac168a | 4212 | if (mddev->pers->check_reshape == NULL) |
6791875e | 4213 | err = -EBUSY; |
f97a5528 | 4214 | else if (!md_is_rdwr(mddev)) |
6791875e N |
4215 | err = -EROFS; |
4216 | else { | |
4217 | mddev->new_layout = n; | |
4218 | err = mddev->pers->check_reshape(mddev); | |
4219 | if (err) | |
4220 | mddev->new_layout = mddev->layout; | |
597a711b | 4221 | } |
b3546035 | 4222 | } else { |
08a02ecd | 4223 | mddev->new_layout = n; |
b3546035 N |
4224 | if (mddev->reshape_position == MaxSector) |
4225 | mddev->layout = n; | |
4226 | } | |
6791875e N |
4227 | mddev_unlock(mddev); |
4228 | return err ?: len; | |
d4dbd025 N |
4229 | } |
4230 | static struct md_sysfs_entry md_layout = | |
80ca3a44 | 4231 | __ATTR(layout, S_IRUGO|S_IWUSR, layout_show, layout_store); |
d4dbd025 | 4232 | |
eae1701f | 4233 | static ssize_t |
fd01b88c | 4234 | raid_disks_show(struct mddev *mddev, char *page) |
eae1701f | 4235 | { |
bb636547 N |
4236 | if (mddev->raid_disks == 0) |
4237 | return 0; | |
08a02ecd N |
4238 | if (mddev->reshape_position != MaxSector && |
4239 | mddev->delta_disks != 0) | |
4240 | return sprintf(page, "%d (%d)\n", mddev->raid_disks, | |
4241 | mddev->raid_disks - mddev->delta_disks); | |
eae1701f N |
4242 | return sprintf(page, "%d\n", mddev->raid_disks); |
4243 | } | |
4244 | ||
fd01b88c | 4245 | static int update_raid_disks(struct mddev *mddev, int raid_disks); |
da943b99 N |
4246 | |
4247 | static ssize_t | |
fd01b88c | 4248 | raid_disks_store(struct mddev *mddev, const char *buf, size_t len) |
da943b99 | 4249 | { |
4c9309c0 | 4250 | unsigned int n; |
6791875e | 4251 | int err; |
da943b99 | 4252 | |
4c9309c0 AD |
4253 | err = kstrtouint(buf, 10, &n); |
4254 | if (err < 0) | |
4255 | return err; | |
da943b99 | 4256 | |
6791875e N |
4257 | err = mddev_lock(mddev); |
4258 | if (err) | |
4259 | return err; | |
da943b99 | 4260 | if (mddev->pers) |
6791875e | 4261 | err = update_raid_disks(mddev, n); |
08a02ecd | 4262 | else if (mddev->reshape_position != MaxSector) { |
c6563a8c | 4263 | struct md_rdev *rdev; |
08a02ecd | 4264 | int olddisks = mddev->raid_disks - mddev->delta_disks; |
c6563a8c | 4265 | |
6791875e | 4266 | err = -EINVAL; |
c6563a8c N |
4267 | rdev_for_each(rdev, mddev) { |
4268 | if (olddisks < n && | |
4269 | rdev->data_offset < rdev->new_data_offset) | |
6791875e | 4270 | goto out_unlock; |
c6563a8c N |
4271 | if (olddisks > n && |
4272 | rdev->data_offset > rdev->new_data_offset) | |
6791875e | 4273 | goto out_unlock; |
c6563a8c | 4274 | } |
6791875e | 4275 | err = 0; |
08a02ecd N |
4276 | mddev->delta_disks = n - olddisks; |
4277 | mddev->raid_disks = n; | |
2c810cdd | 4278 | mddev->reshape_backwards = (mddev->delta_disks < 0); |
08a02ecd | 4279 | } else |
da943b99 | 4280 | mddev->raid_disks = n; |
6791875e N |
4281 | out_unlock: |
4282 | mddev_unlock(mddev); | |
4283 | return err ? err : len; | |
da943b99 N |
4284 | } |
4285 | static struct md_sysfs_entry md_raid_disks = | |
80ca3a44 | 4286 | __ATTR(raid_disks, S_IRUGO|S_IWUSR, raid_disks_show, raid_disks_store); |
eae1701f | 4287 | |
ec164d07 SP |
4288 | static ssize_t |
4289 | uuid_show(struct mddev *mddev, char *page) | |
4290 | { | |
4291 | return sprintf(page, "%pU\n", mddev->uuid); | |
4292 | } | |
4293 | static struct md_sysfs_entry md_uuid = | |
4294 | __ATTR(uuid, S_IRUGO, uuid_show, NULL); | |
4295 | ||
3b34380a | 4296 | static ssize_t |
fd01b88c | 4297 | chunk_size_show(struct mddev *mddev, char *page) |
3b34380a | 4298 | { |
08a02ecd | 4299 | if (mddev->reshape_position != MaxSector && |
664e7c41 AN |
4300 | mddev->chunk_sectors != mddev->new_chunk_sectors) |
4301 | return sprintf(page, "%d (%d)\n", | |
4302 | mddev->new_chunk_sectors << 9, | |
9d8f0363 AN |
4303 | mddev->chunk_sectors << 9); |
4304 | return sprintf(page, "%d\n", mddev->chunk_sectors << 9); | |
3b34380a N |
4305 | } |
4306 | ||
4307 | static ssize_t | |
fd01b88c | 4308 | chunk_size_store(struct mddev *mddev, const char *buf, size_t len) |
3b34380a | 4309 | { |
4c9309c0 | 4310 | unsigned long n; |
6791875e | 4311 | int err; |
3b34380a | 4312 | |
4c9309c0 AD |
4313 | err = kstrtoul(buf, 10, &n); |
4314 | if (err < 0) | |
4315 | return err; | |
3b34380a | 4316 | |
6791875e N |
4317 | err = mddev_lock(mddev); |
4318 | if (err) | |
4319 | return err; | |
b3546035 | 4320 | if (mddev->pers) { |
50ac168a | 4321 | if (mddev->pers->check_reshape == NULL) |
6791875e | 4322 | err = -EBUSY; |
f97a5528 | 4323 | else if (!md_is_rdwr(mddev)) |
6791875e N |
4324 | err = -EROFS; |
4325 | else { | |
4326 | mddev->new_chunk_sectors = n >> 9; | |
4327 | err = mddev->pers->check_reshape(mddev); | |
4328 | if (err) | |
4329 | mddev->new_chunk_sectors = mddev->chunk_sectors; | |
597a711b | 4330 | } |
b3546035 | 4331 | } else { |
664e7c41 | 4332 | mddev->new_chunk_sectors = n >> 9; |
b3546035 | 4333 | if (mddev->reshape_position == MaxSector) |
9d8f0363 | 4334 | mddev->chunk_sectors = n >> 9; |
b3546035 | 4335 | } |
6791875e N |
4336 | mddev_unlock(mddev); |
4337 | return err ?: len; | |
3b34380a N |
4338 | } |
4339 | static struct md_sysfs_entry md_chunk_size = | |
80ca3a44 | 4340 | __ATTR(chunk_size, S_IRUGO|S_IWUSR, chunk_size_show, chunk_size_store); |
3b34380a | 4341 | |
a94213b1 | 4342 | static ssize_t |
fd01b88c | 4343 | resync_start_show(struct mddev *mddev, char *page) |
a94213b1 | 4344 | { |
d1a7c503 N |
4345 | if (mddev->recovery_cp == MaxSector) |
4346 | return sprintf(page, "none\n"); | |
a94213b1 N |
4347 | return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp); |
4348 | } | |
4349 | ||
4350 | static ssize_t | |
fd01b88c | 4351 | resync_start_store(struct mddev *mddev, const char *buf, size_t len) |
a94213b1 | 4352 | { |
4c9309c0 | 4353 | unsigned long long n; |
6791875e | 4354 | int err; |
4c9309c0 AD |
4355 | |
4356 | if (cmd_match(buf, "none")) | |
4357 | n = MaxSector; | |
4358 | else { | |
4359 | err = kstrtoull(buf, 10, &n); | |
4360 | if (err < 0) | |
4361 | return err; | |
4362 | if (n != (sector_t)n) | |
4363 | return -EINVAL; | |
4364 | } | |
a94213b1 | 4365 | |
6791875e N |
4366 | err = mddev_lock(mddev); |
4367 | if (err) | |
4368 | return err; | |
b098636c | 4369 | if (mddev->pers && !test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) |
6791875e | 4370 | err = -EBUSY; |
a94213b1 | 4371 | |
6791875e N |
4372 | if (!err) { |
4373 | mddev->recovery_cp = n; | |
4374 | if (mddev->pers) | |
2953079c | 4375 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
6791875e N |
4376 | } |
4377 | mddev_unlock(mddev); | |
4378 | return err ?: len; | |
a94213b1 N |
4379 | } |
4380 | static struct md_sysfs_entry md_resync_start = | |
750f199e N |
4381 | __ATTR_PREALLOC(resync_start, S_IRUGO|S_IWUSR, |
4382 | resync_start_show, resync_start_store); | |
a94213b1 | 4383 | |
9e653b63 N |
4384 | /* |
4385 | * The array state can be: | |
4386 | * | |
4387 | * clear | |
4388 | * No devices, no size, no level | |
4389 | * Equivalent to STOP_ARRAY ioctl | |
4390 | * inactive | |
4391 | * May have some settings, but array is not active | |
4392 | * all IO results in error | |
4393 | * When written, doesn't tear down array, but just stops it | |
4394 | * suspended (not supported yet) | |
4395 | * All IO requests will block. The array can be reconfigured. | |
910d8cb3 | 4396 | * Writing this, if accepted, will block until array is quiescent |
9e653b63 N |
4397 | * readonly |
4398 | * no resync can happen. no superblocks get written. | |
4399 | * write requests fail | |
4400 | * read-auto | |
4401 | * like readonly, but behaves like 'clean' on a write request. | |
4402 | * | |
4403 | * clean - no pending writes, but otherwise active. | |
4404 | * When written to inactive array, starts without resync | |
4405 | * If a write request arrives then | |
4406 | * if metadata is known, mark 'dirty' and switch to 'active'. | |
4407 | * if not known, block and switch to write-pending | |
4408 | * If written to an active array that has pending writes, then fails. | |
4409 | * active | |
4410 | * fully active: IO and resync can be happening. | |
4411 | * When written to inactive array, starts with resync | |
4412 | * | |
4413 | * write-pending | |
4414 | * clean, but writes are blocked waiting for 'active' to be written. | |
4415 | * | |
4416 | * active-idle | |
4417 | * like active, but no writes have been seen for a while (100msec). | |
4418 | * | |
62f7b198 | 4419 | * broken |
9631abdb MT |
4420 | * Array is failed. It's useful because mounted-arrays aren't stopped |
4421 | * when array is failed, so this state will at least alert the user that | |
4422 | * something is wrong. | |
9e653b63 N |
4423 | */ |
4424 | enum array_state { clear, inactive, suspended, readonly, read_auto, clean, active, | |
62f7b198 | 4425 | write_pending, active_idle, broken, bad_word}; |
05381954 | 4426 | static char *array_states[] = { |
9e653b63 | 4427 | "clear", "inactive", "suspended", "readonly", "read-auto", "clean", "active", |
62f7b198 | 4428 | "write-pending", "active-idle", "broken", NULL }; |
9e653b63 N |
4429 | |
4430 | static int match_word(const char *word, char **list) | |
4431 | { | |
4432 | int n; | |
4433 | for (n=0; list[n]; n++) | |
4434 | if (cmd_match(word, list[n])) | |
4435 | break; | |
4436 | return n; | |
4437 | } | |
4438 | ||
4439 | static ssize_t | |
fd01b88c | 4440 | array_state_show(struct mddev *mddev, char *page) |
9e653b63 N |
4441 | { |
4442 | enum array_state st = inactive; | |
4443 | ||
62f7b198 | 4444 | if (mddev->pers && !test_bit(MD_NOT_READY, &mddev->flags)) { |
9e653b63 | 4445 | switch(mddev->ro) { |
f97a5528 | 4446 | case MD_RDONLY: |
9e653b63 N |
4447 | st = readonly; |
4448 | break; | |
f97a5528 | 4449 | case MD_AUTO_READ: |
9e653b63 N |
4450 | st = read_auto; |
4451 | break; | |
f97a5528 | 4452 | case MD_RDWR: |
55cc39f3 | 4453 | spin_lock(&mddev->lock); |
2953079c | 4454 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
e691063a | 4455 | st = write_pending; |
16f88949 TM |
4456 | else if (mddev->in_sync) |
4457 | st = clean; | |
9e653b63 N |
4458 | else if (mddev->safemode) |
4459 | st = active_idle; | |
4460 | else | |
4461 | st = active; | |
55cc39f3 | 4462 | spin_unlock(&mddev->lock); |
9e653b63 | 4463 | } |
62f7b198 GP |
4464 | |
4465 | if (test_bit(MD_BROKEN, &mddev->flags) && st == clean) | |
4466 | st = broken; | |
4467 | } else { | |
9e653b63 N |
4468 | if (list_empty(&mddev->disks) && |
4469 | mddev->raid_disks == 0 && | |
58c0fed4 | 4470 | mddev->dev_sectors == 0) |
9e653b63 N |
4471 | st = clear; |
4472 | else | |
4473 | st = inactive; | |
4474 | } | |
4475 | return sprintf(page, "%s\n", array_states[st]); | |
4476 | } | |
4477 | ||
f72ffdd6 N |
4478 | static int do_md_stop(struct mddev *mddev, int ro, struct block_device *bdev); |
4479 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev); | |
fd01b88c | 4480 | static int restart_array(struct mddev *mddev); |
9e653b63 N |
4481 | |
4482 | static ssize_t | |
fd01b88c | 4483 | array_state_store(struct mddev *mddev, const char *buf, size_t len) |
9e653b63 | 4484 | { |
6497709b | 4485 | int err = 0; |
9e653b63 | 4486 | enum array_state st = match_word(buf, array_states); |
6791875e | 4487 | |
09f894af MT |
4488 | /* No lock dependent actions */ |
4489 | switch (st) { | |
4490 | case suspended: /* not supported yet */ | |
4491 | case write_pending: /* cannot be set */ | |
4492 | case active_idle: /* cannot be set */ | |
4493 | case broken: /* cannot be set */ | |
4494 | case bad_word: | |
4495 | return -EINVAL; | |
4496 | default: | |
4497 | break; | |
4498 | } | |
4499 | ||
f97a5528 YB |
4500 | if (mddev->pers && (st == active || st == clean) && |
4501 | mddev->ro != MD_RDONLY) { | |
6791875e N |
4502 | /* don't take reconfig_mutex when toggling between |
4503 | * clean and active | |
4504 | */ | |
4505 | spin_lock(&mddev->lock); | |
4506 | if (st == active) { | |
4507 | restart_array(mddev); | |
2953079c | 4508 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
91a6c4ad | 4509 | md_wakeup_thread(mddev->thread); |
6791875e | 4510 | wake_up(&mddev->sb_wait); |
6791875e N |
4511 | } else /* st == clean */ { |
4512 | restart_array(mddev); | |
6497709b | 4513 | if (!set_in_sync(mddev)) |
6791875e N |
4514 | err = -EBUSY; |
4515 | } | |
573275b5 TM |
4516 | if (!err) |
4517 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
6791875e | 4518 | spin_unlock(&mddev->lock); |
c008f1d3 | 4519 | return err ?: len; |
6791875e N |
4520 | } |
4521 | err = mddev_lock(mddev); | |
4522 | if (err) | |
4523 | return err; | |
09f894af MT |
4524 | |
4525 | switch (st) { | |
9e653b63 | 4526 | case inactive: |
09f894af | 4527 | /* stop an active array, return 0 otherwise */ |
90cf195d | 4528 | if (mddev->pers) |
a05b7ea0 | 4529 | err = do_md_stop(mddev, 2, NULL); |
9e653b63 | 4530 | break; |
09f894af MT |
4531 | case clear: |
4532 | err = do_md_stop(mddev, 0, NULL); | |
4533 | break; | |
9e653b63 N |
4534 | case readonly: |
4535 | if (mddev->pers) | |
a05b7ea0 | 4536 | err = md_set_readonly(mddev, NULL); |
9e653b63 | 4537 | else { |
f97a5528 | 4538 | mddev->ro = MD_RDONLY; |
648b629e | 4539 | set_disk_ro(mddev->gendisk, 1); |
9e653b63 N |
4540 | err = do_md_run(mddev); |
4541 | } | |
4542 | break; | |
4543 | case read_auto: | |
9e653b63 | 4544 | if (mddev->pers) { |
f97a5528 | 4545 | if (md_is_rdwr(mddev)) |
a05b7ea0 | 4546 | err = md_set_readonly(mddev, NULL); |
f97a5528 | 4547 | else if (mddev->ro == MD_RDONLY) |
648b629e N |
4548 | err = restart_array(mddev); |
4549 | if (err == 0) { | |
f97a5528 | 4550 | mddev->ro = MD_AUTO_READ; |
648b629e N |
4551 | set_disk_ro(mddev->gendisk, 0); |
4552 | } | |
9e653b63 | 4553 | } else { |
f97a5528 | 4554 | mddev->ro = MD_AUTO_READ; |
9e653b63 N |
4555 | err = do_md_run(mddev); |
4556 | } | |
4557 | break; | |
4558 | case clean: | |
4559 | if (mddev->pers) { | |
339421de SL |
4560 | err = restart_array(mddev); |
4561 | if (err) | |
4562 | break; | |
85572d7c | 4563 | spin_lock(&mddev->lock); |
6497709b | 4564 | if (!set_in_sync(mddev)) |
e691063a | 4565 | err = -EBUSY; |
85572d7c | 4566 | spin_unlock(&mddev->lock); |
5bf29597 N |
4567 | } else |
4568 | err = -EINVAL; | |
9e653b63 N |
4569 | break; |
4570 | case active: | |
4571 | if (mddev->pers) { | |
339421de SL |
4572 | err = restart_array(mddev); |
4573 | if (err) | |
4574 | break; | |
2953079c | 4575 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
9e653b63 N |
4576 | wake_up(&mddev->sb_wait); |
4577 | err = 0; | |
4578 | } else { | |
f97a5528 | 4579 | mddev->ro = MD_RDWR; |
648b629e | 4580 | set_disk_ro(mddev->gendisk, 0); |
9e653b63 N |
4581 | err = do_md_run(mddev); |
4582 | } | |
4583 | break; | |
09f894af MT |
4584 | default: |
4585 | err = -EINVAL; | |
9e653b63 N |
4586 | break; |
4587 | } | |
6791875e N |
4588 | |
4589 | if (!err) { | |
1d23f178 N |
4590 | if (mddev->hold_active == UNTIL_IOCTL) |
4591 | mddev->hold_active = 0; | |
00bcb4ac | 4592 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 4593 | } |
6791875e N |
4594 | mddev_unlock(mddev); |
4595 | return err ?: len; | |
9e653b63 | 4596 | } |
80ca3a44 | 4597 | static struct md_sysfs_entry md_array_state = |
750f199e | 4598 | __ATTR_PREALLOC(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store); |
9e653b63 | 4599 | |
1e50915f | 4600 | static ssize_t |
fd01b88c | 4601 | max_corrected_read_errors_show(struct mddev *mddev, char *page) { |
1e50915f RB |
4602 | return sprintf(page, "%d\n", |
4603 | atomic_read(&mddev->max_corr_read_errors)); | |
4604 | } | |
4605 | ||
4606 | static ssize_t | |
fd01b88c | 4607 | max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len) |
1e50915f | 4608 | { |
4c9309c0 AD |
4609 | unsigned int n; |
4610 | int rv; | |
1e50915f | 4611 | |
4c9309c0 AD |
4612 | rv = kstrtouint(buf, 10, &n); |
4613 | if (rv < 0) | |
4614 | return rv; | |
f8b20a40 LN |
4615 | if (n > INT_MAX) |
4616 | return -EINVAL; | |
4c9309c0 AD |
4617 | atomic_set(&mddev->max_corr_read_errors, n); |
4618 | return len; | |
1e50915f RB |
4619 | } |
4620 | ||
4621 | static struct md_sysfs_entry max_corr_read_errors = | |
4622 | __ATTR(max_read_errors, S_IRUGO|S_IWUSR, max_corrected_read_errors_show, | |
4623 | max_corrected_read_errors_store); | |
4624 | ||
6d7ff738 | 4625 | static ssize_t |
fd01b88c | 4626 | null_show(struct mddev *mddev, char *page) |
6d7ff738 N |
4627 | { |
4628 | return -EINVAL; | |
4629 | } | |
4630 | ||
4631 | static ssize_t | |
fd01b88c | 4632 | new_dev_store(struct mddev *mddev, const char *buf, size_t len) |
6d7ff738 N |
4633 | { |
4634 | /* buf must be %d:%d\n? giving major and minor numbers */ | |
4635 | /* The new device is added to the array. | |
4636 | * If the array has a persistent superblock, we read the | |
4637 | * superblock to initialise info and check validity. | |
4638 | * Otherwise, only checking done is that in bind_rdev_to_array, | |
4639 | * which mainly checks size. | |
4640 | */ | |
4641 | char *e; | |
4642 | int major = simple_strtoul(buf, &e, 10); | |
4643 | int minor; | |
4644 | dev_t dev; | |
3cb03002 | 4645 | struct md_rdev *rdev; |
6d7ff738 N |
4646 | int err; |
4647 | ||
4648 | if (!*buf || *e != ':' || !e[1] || e[1] == '\n') | |
4649 | return -EINVAL; | |
4650 | minor = simple_strtoul(e+1, &e, 10); | |
4651 | if (*e && *e != '\n') | |
4652 | return -EINVAL; | |
4653 | dev = MKDEV(major, minor); | |
4654 | if (major != MAJOR(dev) || | |
4655 | minor != MINOR(dev)) | |
4656 | return -EOVERFLOW; | |
4657 | ||
58226942 | 4658 | err = mddev_suspend_and_lock(mddev); |
6791875e N |
4659 | if (err) |
4660 | return err; | |
6d7ff738 N |
4661 | if (mddev->persistent) { |
4662 | rdev = md_import_device(dev, mddev->major_version, | |
4663 | mddev->minor_version); | |
4664 | if (!IS_ERR(rdev) && !list_empty(&mddev->disks)) { | |
3cb03002 N |
4665 | struct md_rdev *rdev0 |
4666 | = list_entry(mddev->disks.next, | |
4667 | struct md_rdev, same_set); | |
6d7ff738 N |
4668 | err = super_types[mddev->major_version] |
4669 | .load_super(rdev, rdev0, mddev->minor_version); | |
4670 | if (err < 0) | |
4671 | goto out; | |
4672 | } | |
c5d79adb N |
4673 | } else if (mddev->external) |
4674 | rdev = md_import_device(dev, -2, -1); | |
4675 | else | |
6d7ff738 N |
4676 | rdev = md_import_device(dev, -1, -1); |
4677 | ||
9a8c0fa8 | 4678 | if (IS_ERR(rdev)) { |
58226942 | 4679 | mddev_unlock_and_resume(mddev); |
6d7ff738 | 4680 | return PTR_ERR(rdev); |
9a8c0fa8 | 4681 | } |
6d7ff738 N |
4682 | err = bind_rdev_to_array(rdev, mddev); |
4683 | out: | |
4684 | if (err) | |
2736e8ee | 4685 | export_rdev(rdev, mddev); |
58226942 | 4686 | mddev_unlock_and_resume(mddev); |
5492c46e | 4687 | if (!err) |
54679486 | 4688 | md_new_event(); |
6d7ff738 N |
4689 | return err ? err : len; |
4690 | } | |
4691 | ||
4692 | static struct md_sysfs_entry md_new_device = | |
80ca3a44 | 4693 | __ATTR(new_dev, S_IWUSR, null_show, new_dev_store); |
3b34380a | 4694 | |
9b1d1dac | 4695 | static ssize_t |
fd01b88c | 4696 | bitmap_store(struct mddev *mddev, const char *buf, size_t len) |
9b1d1dac PC |
4697 | { |
4698 | char *end; | |
4699 | unsigned long chunk, end_chunk; | |
6791875e | 4700 | int err; |
9b1d1dac | 4701 | |
6791875e N |
4702 | err = mddev_lock(mddev); |
4703 | if (err) | |
4704 | return err; | |
9b1d1dac PC |
4705 | if (!mddev->bitmap) |
4706 | goto out; | |
4707 | /* buf should be <chunk> <chunk> ... or <chunk>-<chunk> ... (range) */ | |
4708 | while (*buf) { | |
4709 | chunk = end_chunk = simple_strtoul(buf, &end, 0); | |
4710 | if (buf == end) break; | |
4711 | if (*end == '-') { /* range */ | |
4712 | buf = end + 1; | |
4713 | end_chunk = simple_strtoul(buf, &end, 0); | |
4714 | if (buf == end) break; | |
4715 | } | |
4716 | if (*end && !isspace(*end)) break; | |
e64e4018 | 4717 | md_bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk); |
e7d2860b | 4718 | buf = skip_spaces(end); |
9b1d1dac | 4719 | } |
e64e4018 | 4720 | md_bitmap_unplug(mddev->bitmap); /* flush the bits to disk */ |
9b1d1dac | 4721 | out: |
6791875e | 4722 | mddev_unlock(mddev); |
9b1d1dac PC |
4723 | return len; |
4724 | } | |
4725 | ||
4726 | static struct md_sysfs_entry md_bitmap = | |
4727 | __ATTR(bitmap_set_bits, S_IWUSR, null_show, bitmap_store); | |
4728 | ||
a35b0d69 | 4729 | static ssize_t |
fd01b88c | 4730 | size_show(struct mddev *mddev, char *page) |
a35b0d69 | 4731 | { |
58c0fed4 AN |
4732 | return sprintf(page, "%llu\n", |
4733 | (unsigned long long)mddev->dev_sectors / 2); | |
a35b0d69 N |
4734 | } |
4735 | ||
fd01b88c | 4736 | static int update_size(struct mddev *mddev, sector_t num_sectors); |
a35b0d69 N |
4737 | |
4738 | static ssize_t | |
fd01b88c | 4739 | size_store(struct mddev *mddev, const char *buf, size_t len) |
a35b0d69 N |
4740 | { |
4741 | /* If array is inactive, we can reduce the component size, but | |
4742 | * not increase it (except from 0). | |
4743 | * If array is active, we can try an on-line resize | |
4744 | */ | |
b522adcd DW |
4745 | sector_t sectors; |
4746 | int err = strict_blocks_to_sectors(buf, §ors); | |
a35b0d69 | 4747 | |
58c0fed4 AN |
4748 | if (err < 0) |
4749 | return err; | |
6791875e N |
4750 | err = mddev_lock(mddev); |
4751 | if (err) | |
4752 | return err; | |
a35b0d69 | 4753 | if (mddev->pers) { |
58c0fed4 | 4754 | err = update_size(mddev, sectors); |
4ba1e788 XN |
4755 | if (err == 0) |
4756 | md_update_sb(mddev, 1); | |
a35b0d69 | 4757 | } else { |
58c0fed4 AN |
4758 | if (mddev->dev_sectors == 0 || |
4759 | mddev->dev_sectors > sectors) | |
4760 | mddev->dev_sectors = sectors; | |
a35b0d69 N |
4761 | else |
4762 | err = -ENOSPC; | |
4763 | } | |
6791875e | 4764 | mddev_unlock(mddev); |
a35b0d69 N |
4765 | return err ? err : len; |
4766 | } | |
4767 | ||
4768 | static struct md_sysfs_entry md_size = | |
80ca3a44 | 4769 | __ATTR(component_size, S_IRUGO|S_IWUSR, size_show, size_store); |
a35b0d69 | 4770 | |
83f0d77a | 4771 | /* Metadata version. |
e691063a N |
4772 | * This is one of |
4773 | * 'none' for arrays with no metadata (good luck...) | |
4774 | * 'external' for arrays with externally managed metadata, | |
8bb93aac N |
4775 | * or N.M for internally known formats |
4776 | */ | |
4777 | static ssize_t | |
fd01b88c | 4778 | metadata_show(struct mddev *mddev, char *page) |
8bb93aac N |
4779 | { |
4780 | if (mddev->persistent) | |
4781 | return sprintf(page, "%d.%d\n", | |
4782 | mddev->major_version, mddev->minor_version); | |
e691063a N |
4783 | else if (mddev->external) |
4784 | return sprintf(page, "external:%s\n", mddev->metadata_type); | |
8bb93aac N |
4785 | else |
4786 | return sprintf(page, "none\n"); | |
4787 | } | |
4788 | ||
4789 | static ssize_t | |
fd01b88c | 4790 | metadata_store(struct mddev *mddev, const char *buf, size_t len) |
8bb93aac N |
4791 | { |
4792 | int major, minor; | |
4793 | char *e; | |
6791875e | 4794 | int err; |
ea43ddd8 N |
4795 | /* Changing the details of 'external' metadata is |
4796 | * always permitted. Otherwise there must be | |
4797 | * no devices attached to the array. | |
4798 | */ | |
6791875e N |
4799 | |
4800 | err = mddev_lock(mddev); | |
4801 | if (err) | |
4802 | return err; | |
4803 | err = -EBUSY; | |
ea43ddd8 N |
4804 | if (mddev->external && strncmp(buf, "external:", 9) == 0) |
4805 | ; | |
4806 | else if (!list_empty(&mddev->disks)) | |
6791875e | 4807 | goto out_unlock; |
8bb93aac | 4808 | |
6791875e | 4809 | err = 0; |
8bb93aac N |
4810 | if (cmd_match(buf, "none")) { |
4811 | mddev->persistent = 0; | |
e691063a N |
4812 | mddev->external = 0; |
4813 | mddev->major_version = 0; | |
4814 | mddev->minor_version = 90; | |
6791875e | 4815 | goto out_unlock; |
e691063a N |
4816 | } |
4817 | if (strncmp(buf, "external:", 9) == 0) { | |
20a49ff6 | 4818 | size_t namelen = len-9; |
e691063a N |
4819 | if (namelen >= sizeof(mddev->metadata_type)) |
4820 | namelen = sizeof(mddev->metadata_type)-1; | |
ceb04163 | 4821 | memcpy(mddev->metadata_type, buf+9, namelen); |
e691063a N |
4822 | mddev->metadata_type[namelen] = 0; |
4823 | if (namelen && mddev->metadata_type[namelen-1] == '\n') | |
4824 | mddev->metadata_type[--namelen] = 0; | |
4825 | mddev->persistent = 0; | |
4826 | mddev->external = 1; | |
8bb93aac N |
4827 | mddev->major_version = 0; |
4828 | mddev->minor_version = 90; | |
6791875e | 4829 | goto out_unlock; |
8bb93aac N |
4830 | } |
4831 | major = simple_strtoul(buf, &e, 10); | |
6791875e | 4832 | err = -EINVAL; |
8bb93aac | 4833 | if (e==buf || *e != '.') |
6791875e | 4834 | goto out_unlock; |
8bb93aac N |
4835 | buf = e+1; |
4836 | minor = simple_strtoul(buf, &e, 10); | |
3f9d7b0d | 4837 | if (e==buf || (*e && *e != '\n') ) |
6791875e N |
4838 | goto out_unlock; |
4839 | err = -ENOENT; | |
50511da3 | 4840 | if (major >= ARRAY_SIZE(super_types) || super_types[major].name == NULL) |
6791875e | 4841 | goto out_unlock; |
8bb93aac N |
4842 | mddev->major_version = major; |
4843 | mddev->minor_version = minor; | |
4844 | mddev->persistent = 1; | |
e691063a | 4845 | mddev->external = 0; |
6791875e N |
4846 | err = 0; |
4847 | out_unlock: | |
4848 | mddev_unlock(mddev); | |
4849 | return err ?: len; | |
8bb93aac N |
4850 | } |
4851 | ||
4852 | static struct md_sysfs_entry md_metadata = | |
750f199e | 4853 | __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store); |
8bb93aac | 4854 | |
24dd469d | 4855 | static ssize_t |
fd01b88c | 4856 | action_show(struct mddev *mddev, char *page) |
24dd469d | 4857 | { |
7eec314d | 4858 | char *type = "idle"; |
b7b17c9b N |
4859 | unsigned long recovery = mddev->recovery; |
4860 | if (test_bit(MD_RECOVERY_FROZEN, &recovery)) | |
b6a9ce68 | 4861 | type = "frozen"; |
b7b17c9b | 4862 | else if (test_bit(MD_RECOVERY_RUNNING, &recovery) || |
f97a5528 | 4863 | (md_is_rdwr(mddev) && test_bit(MD_RECOVERY_NEEDED, &recovery))) { |
b7b17c9b | 4864 | if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) |
ccfcc3c1 | 4865 | type = "reshape"; |
b7b17c9b N |
4866 | else if (test_bit(MD_RECOVERY_SYNC, &recovery)) { |
4867 | if (!test_bit(MD_RECOVERY_REQUESTED, &recovery)) | |
24dd469d | 4868 | type = "resync"; |
b7b17c9b | 4869 | else if (test_bit(MD_RECOVERY_CHECK, &recovery)) |
24dd469d N |
4870 | type = "check"; |
4871 | else | |
4872 | type = "repair"; | |
b7b17c9b | 4873 | } else if (test_bit(MD_RECOVERY_RECOVER, &recovery)) |
24dd469d | 4874 | type = "recover"; |
985ca973 N |
4875 | else if (mddev->reshape_position != MaxSector) |
4876 | type = "reshape"; | |
24dd469d N |
4877 | } |
4878 | return sprintf(page, "%s\n", type); | |
4879 | } | |
4880 | ||
f52f5c71 YK |
4881 | /** |
4882 | * stop_sync_thread() - wait for sync_thread to stop if it's running. | |
4883 | * @mddev: the array. | |
4884 | * @locked: if set, reconfig_mutex will still be held after this function | |
4885 | * return; if not set, reconfig_mutex will be released after this | |
4886 | * function return. | |
4887 | * @check_seq: if set, only wait for curent running sync_thread to stop, noted | |
4888 | * that new sync_thread can still start. | |
4889 | */ | |
4890 | static void stop_sync_thread(struct mddev *mddev, bool locked, bool check_seq) | |
64e5e09a | 4891 | { |
f52f5c71 | 4892 | int sync_seq; |
64e5e09a | 4893 | |
f52f5c71 YK |
4894 | if (check_seq) |
4895 | sync_seq = atomic_read(&mddev->sync_seq); | |
64e5e09a | 4896 | |
64e5e09a | 4897 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
f52f5c71 YK |
4898 | if (!locked) |
4899 | mddev_unlock(mddev); | |
64e5e09a YK |
4900 | return; |
4901 | } | |
4902 | ||
f52f5c71 | 4903 | mddev_unlock(mddev); |
64e5e09a | 4904 | |
130443d6 YK |
4905 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
4906 | /* | |
4907 | * Thread might be blocked waiting for metadata update which will now | |
4908 | * never happen | |
4909 | */ | |
4910 | md_wakeup_thread_directly(mddev->sync_thread); | |
f52f5c71 YK |
4911 | if (work_pending(&mddev->sync_work)) |
4912 | flush_work(&mddev->sync_work); | |
64e5e09a | 4913 | |
f52f5c71 YK |
4914 | wait_event(resync_wait, |
4915 | !test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || | |
4916 | (check_seq && sync_seq != atomic_read(&mddev->sync_seq))); | |
4917 | ||
4918 | if (locked) | |
4919 | mddev_lock_nointr(mddev); | |
64e5e09a YK |
4920 | } |
4921 | ||
4922 | static void idle_sync_thread(struct mddev *mddev) | |
4923 | { | |
6f56f0c4 | 4924 | mutex_lock(&mddev->sync_mutex); |
64e5e09a | 4925 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
130443d6 | 4926 | |
f52f5c71 YK |
4927 | if (mddev_lock(mddev)) { |
4928 | mutex_unlock(&mddev->sync_mutex); | |
4929 | return; | |
4930 | } | |
130443d6 | 4931 | |
f52f5c71 | 4932 | stop_sync_thread(mddev, false, true); |
6f56f0c4 | 4933 | mutex_unlock(&mddev->sync_mutex); |
64e5e09a YK |
4934 | } |
4935 | ||
4936 | static void frozen_sync_thread(struct mddev *mddev) | |
4937 | { | |
6f56f0c4 | 4938 | mutex_lock(&mddev->sync_mutex); |
64e5e09a | 4939 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
130443d6 | 4940 | |
f52f5c71 YK |
4941 | if (mddev_lock(mddev)) { |
4942 | mutex_unlock(&mddev->sync_mutex); | |
4943 | return; | |
4944 | } | |
130443d6 | 4945 | |
f52f5c71 | 4946 | stop_sync_thread(mddev, false, false); |
6f56f0c4 | 4947 | mutex_unlock(&mddev->sync_mutex); |
64e5e09a YK |
4948 | } |
4949 | ||
24dd469d | 4950 | static ssize_t |
fd01b88c | 4951 | action_store(struct mddev *mddev, const char *page, size_t len) |
24dd469d | 4952 | { |
7eec314d N |
4953 | if (!mddev->pers || !mddev->pers->sync_request) |
4954 | return -EINVAL; | |
4955 | ||
b6a9ce68 | 4956 | |
64e5e09a YK |
4957 | if (cmd_match(page, "idle")) |
4958 | idle_sync_thread(mddev); | |
4959 | else if (cmd_match(page, "frozen")) | |
4960 | frozen_sync_thread(mddev); | |
4961 | else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) | |
24dd469d | 4962 | return -EBUSY; |
72a23c21 | 4963 | else if (cmd_match(page, "resync")) |
56ccc112 | 4964 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4965 | else if (cmd_match(page, "recover")) { |
56ccc112 | 4966 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4967 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
72a23c21 | 4968 | } else if (cmd_match(page, "reshape")) { |
16484bf5 N |
4969 | int err; |
4970 | if (mddev->pers->start_reshape == NULL) | |
4971 | return -EINVAL; | |
6791875e N |
4972 | err = mddev_lock(mddev); |
4973 | if (!err) { | |
873f50ec | 4974 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
312045ee | 4975 | err = -EBUSY; |
873f50ec YK |
4976 | } else if (mddev->reshape_position == MaxSector || |
4977 | mddev->pers->check_reshape == NULL || | |
4978 | mddev->pers->check_reshape(mddev)) { | |
312045ee N |
4979 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
4980 | err = mddev->pers->start_reshape(mddev); | |
873f50ec YK |
4981 | } else { |
4982 | /* | |
4983 | * If reshape is still in progress, and | |
4984 | * md_check_recovery() can continue to reshape, | |
4985 | * don't restart reshape because data can be | |
4986 | * corrupted for raid456. | |
4987 | */ | |
4988 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
312045ee | 4989 | } |
6791875e N |
4990 | mddev_unlock(mddev); |
4991 | } | |
16484bf5 N |
4992 | if (err) |
4993 | return err; | |
e1a86dbb | 4994 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
16484bf5 | 4995 | } else { |
bce74dac | 4996 | if (cmd_match(page, "check")) |
7eec314d | 4997 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
2adc7d47 | 4998 | else if (!cmd_match(page, "repair")) |
7eec314d | 4999 | return -EINVAL; |
56ccc112 | 5000 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
7eec314d N |
5001 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
5002 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
7eec314d | 5003 | } |
f97a5528 | 5004 | if (mddev->ro == MD_AUTO_READ) { |
48c26ddc N |
5005 | /* A write to sync_action is enough to justify |
5006 | * canceling read-auto mode | |
5007 | */ | |
81e2ce1b | 5008 | flush_work(&mddev->sync_work); |
f97a5528 | 5009 | mddev->ro = MD_RDWR; |
48c26ddc N |
5010 | md_wakeup_thread(mddev->sync_thread); |
5011 | } | |
03c902e1 | 5012 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
24dd469d | 5013 | md_wakeup_thread(mddev->thread); |
00bcb4ac | 5014 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
24dd469d N |
5015 | return len; |
5016 | } | |
5017 | ||
c4a39551 | 5018 | static struct md_sysfs_entry md_scan_mode = |
750f199e | 5019 | __ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store); |
c4a39551 JB |
5020 | |
5021 | static ssize_t | |
5022 | last_sync_action_show(struct mddev *mddev, char *page) | |
5023 | { | |
5024 | return sprintf(page, "%s\n", mddev->last_sync_action); | |
5025 | } | |
5026 | ||
5027 | static struct md_sysfs_entry md_last_scan_mode = __ATTR_RO(last_sync_action); | |
5028 | ||
9d88883e | 5029 | static ssize_t |
fd01b88c | 5030 | mismatch_cnt_show(struct mddev *mddev, char *page) |
9d88883e N |
5031 | { |
5032 | return sprintf(page, "%llu\n", | |
7f7583d4 JM |
5033 | (unsigned long long) |
5034 | atomic64_read(&mddev->resync_mismatches)); | |
9d88883e N |
5035 | } |
5036 | ||
80ca3a44 | 5037 | static struct md_sysfs_entry md_mismatches = __ATTR_RO(mismatch_cnt); |
9d88883e | 5038 | |
88202a0c | 5039 | static ssize_t |
fd01b88c | 5040 | sync_min_show(struct mddev *mddev, char *page) |
88202a0c N |
5041 | { |
5042 | return sprintf(page, "%d (%s)\n", speed_min(mddev), | |
5043 | mddev->sync_speed_min ? "local": "system"); | |
5044 | } | |
5045 | ||
5046 | static ssize_t | |
fd01b88c | 5047 | sync_min_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 5048 | { |
4c9309c0 AD |
5049 | unsigned int min; |
5050 | int rv; | |
5051 | ||
88202a0c | 5052 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
5053 | min = 0; |
5054 | } else { | |
5055 | rv = kstrtouint(buf, 10, &min); | |
5056 | if (rv < 0) | |
5057 | return rv; | |
5058 | if (min == 0) | |
5059 | return -EINVAL; | |
88202a0c | 5060 | } |
88202a0c N |
5061 | mddev->sync_speed_min = min; |
5062 | return len; | |
5063 | } | |
5064 | ||
5065 | static struct md_sysfs_entry md_sync_min = | |
5066 | __ATTR(sync_speed_min, S_IRUGO|S_IWUSR, sync_min_show, sync_min_store); | |
5067 | ||
5068 | static ssize_t | |
fd01b88c | 5069 | sync_max_show(struct mddev *mddev, char *page) |
88202a0c N |
5070 | { |
5071 | return sprintf(page, "%d (%s)\n", speed_max(mddev), | |
5072 | mddev->sync_speed_max ? "local": "system"); | |
5073 | } | |
5074 | ||
5075 | static ssize_t | |
fd01b88c | 5076 | sync_max_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 5077 | { |
4c9309c0 AD |
5078 | unsigned int max; |
5079 | int rv; | |
5080 | ||
88202a0c | 5081 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
5082 | max = 0; |
5083 | } else { | |
5084 | rv = kstrtouint(buf, 10, &max); | |
5085 | if (rv < 0) | |
5086 | return rv; | |
5087 | if (max == 0) | |
5088 | return -EINVAL; | |
88202a0c | 5089 | } |
88202a0c N |
5090 | mddev->sync_speed_max = max; |
5091 | return len; | |
5092 | } | |
5093 | ||
5094 | static struct md_sysfs_entry md_sync_max = | |
5095 | __ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store); | |
5096 | ||
d7f3d291 | 5097 | static ssize_t |
fd01b88c | 5098 | degraded_show(struct mddev *mddev, char *page) |
d7f3d291 IP |
5099 | { |
5100 | return sprintf(page, "%d\n", mddev->degraded); | |
5101 | } | |
5102 | static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded); | |
88202a0c | 5103 | |
90b08710 | 5104 | static ssize_t |
fd01b88c | 5105 | sync_force_parallel_show(struct mddev *mddev, char *page) |
90b08710 BS |
5106 | { |
5107 | return sprintf(page, "%d\n", mddev->parallel_resync); | |
5108 | } | |
5109 | ||
5110 | static ssize_t | |
fd01b88c | 5111 | sync_force_parallel_store(struct mddev *mddev, const char *buf, size_t len) |
90b08710 BS |
5112 | { |
5113 | long n; | |
5114 | ||
b29bebd6 | 5115 | if (kstrtol(buf, 10, &n)) |
90b08710 BS |
5116 | return -EINVAL; |
5117 | ||
5118 | if (n != 0 && n != 1) | |
5119 | return -EINVAL; | |
5120 | ||
5121 | mddev->parallel_resync = n; | |
5122 | ||
5123 | if (mddev->sync_thread) | |
5124 | wake_up(&resync_wait); | |
5125 | ||
5126 | return len; | |
5127 | } | |
5128 | ||
5129 | /* force parallel resync, even with shared block devices */ | |
5130 | static struct md_sysfs_entry md_sync_force_parallel = | |
5131 | __ATTR(sync_force_parallel, S_IRUGO|S_IWUSR, | |
5132 | sync_force_parallel_show, sync_force_parallel_store); | |
5133 | ||
88202a0c | 5134 | static ssize_t |
fd01b88c | 5135 | sync_speed_show(struct mddev *mddev, char *page) |
88202a0c N |
5136 | { |
5137 | unsigned long resync, dt, db; | |
eac58d08 | 5138 | if (mddev->curr_resync == MD_RESYNC_NONE) |
d1a7c503 | 5139 | return sprintf(page, "none\n"); |
9687a60c AN |
5140 | resync = mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active); |
5141 | dt = (jiffies - mddev->resync_mark) / HZ; | |
88202a0c | 5142 | if (!dt) dt++; |
9687a60c AN |
5143 | db = resync - mddev->resync_mark_cnt; |
5144 | return sprintf(page, "%lu\n", db/dt/2); /* K/sec */ | |
88202a0c N |
5145 | } |
5146 | ||
80ca3a44 | 5147 | static struct md_sysfs_entry md_sync_speed = __ATTR_RO(sync_speed); |
88202a0c N |
5148 | |
5149 | static ssize_t | |
fd01b88c | 5150 | sync_completed_show(struct mddev *mddev, char *page) |
88202a0c | 5151 | { |
13ae864b | 5152 | unsigned long long max_sectors, resync; |
88202a0c | 5153 | |
acb180b0 N |
5154 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
5155 | return sprintf(page, "none\n"); | |
5156 | ||
eac58d08 LG |
5157 | if (mddev->curr_resync == MD_RESYNC_YIELDED || |
5158 | mddev->curr_resync == MD_RESYNC_DELAYED) | |
72f36d59 N |
5159 | return sprintf(page, "delayed\n"); |
5160 | ||
c804cdec N |
5161 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
5162 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
58c0fed4 | 5163 | max_sectors = mddev->resync_max_sectors; |
88202a0c | 5164 | else |
58c0fed4 | 5165 | max_sectors = mddev->dev_sectors; |
88202a0c | 5166 | |
acb180b0 | 5167 | resync = mddev->curr_resync_completed; |
13ae864b | 5168 | return sprintf(page, "%llu / %llu\n", resync, max_sectors); |
88202a0c N |
5169 | } |
5170 | ||
750f199e N |
5171 | static struct md_sysfs_entry md_sync_completed = |
5172 | __ATTR_PREALLOC(sync_completed, S_IRUGO, sync_completed_show, NULL); | |
88202a0c | 5173 | |
5e96ee65 | 5174 | static ssize_t |
fd01b88c | 5175 | min_sync_show(struct mddev *mddev, char *page) |
5e96ee65 NB |
5176 | { |
5177 | return sprintf(page, "%llu\n", | |
5178 | (unsigned long long)mddev->resync_min); | |
5179 | } | |
5180 | static ssize_t | |
fd01b88c | 5181 | min_sync_store(struct mddev *mddev, const char *buf, size_t len) |
5e96ee65 NB |
5182 | { |
5183 | unsigned long long min; | |
23da422b | 5184 | int err; |
23da422b | 5185 | |
b29bebd6 | 5186 | if (kstrtoull(buf, 10, &min)) |
5e96ee65 | 5187 | return -EINVAL; |
23da422b N |
5188 | |
5189 | spin_lock(&mddev->lock); | |
5190 | err = -EINVAL; | |
5e96ee65 | 5191 | if (min > mddev->resync_max) |
23da422b N |
5192 | goto out_unlock; |
5193 | ||
5194 | err = -EBUSY; | |
5e96ee65 | 5195 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 5196 | goto out_unlock; |
5e96ee65 | 5197 | |
50c37b13 N |
5198 | /* Round down to multiple of 4K for safety */ |
5199 | mddev->resync_min = round_down(min, 8); | |
23da422b | 5200 | err = 0; |
5e96ee65 | 5201 | |
23da422b N |
5202 | out_unlock: |
5203 | spin_unlock(&mddev->lock); | |
5204 | return err ?: len; | |
5e96ee65 NB |
5205 | } |
5206 | ||
5207 | static struct md_sysfs_entry md_min_sync = | |
5208 | __ATTR(sync_min, S_IRUGO|S_IWUSR, min_sync_show, min_sync_store); | |
5209 | ||
c6207277 | 5210 | static ssize_t |
fd01b88c | 5211 | max_sync_show(struct mddev *mddev, char *page) |
c6207277 N |
5212 | { |
5213 | if (mddev->resync_max == MaxSector) | |
5214 | return sprintf(page, "max\n"); | |
5215 | else | |
5216 | return sprintf(page, "%llu\n", | |
5217 | (unsigned long long)mddev->resync_max); | |
5218 | } | |
5219 | static ssize_t | |
fd01b88c | 5220 | max_sync_store(struct mddev *mddev, const char *buf, size_t len) |
c6207277 | 5221 | { |
23da422b N |
5222 | int err; |
5223 | spin_lock(&mddev->lock); | |
c6207277 N |
5224 | if (strncmp(buf, "max", 3) == 0) |
5225 | mddev->resync_max = MaxSector; | |
5226 | else { | |
5e96ee65 | 5227 | unsigned long long max; |
23da422b N |
5228 | int chunk; |
5229 | ||
5230 | err = -EINVAL; | |
b29bebd6 | 5231 | if (kstrtoull(buf, 10, &max)) |
23da422b | 5232 | goto out_unlock; |
5e96ee65 | 5233 | if (max < mddev->resync_min) |
23da422b N |
5234 | goto out_unlock; |
5235 | ||
5236 | err = -EBUSY; | |
f97a5528 | 5237 | if (max < mddev->resync_max && md_is_rdwr(mddev) && |
c6207277 | 5238 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 5239 | goto out_unlock; |
c6207277 N |
5240 | |
5241 | /* Must be a multiple of chunk_size */ | |
23da422b N |
5242 | chunk = mddev->chunk_sectors; |
5243 | if (chunk) { | |
2ac06c33 | 5244 | sector_t temp = max; |
23da422b N |
5245 | |
5246 | err = -EINVAL; | |
5247 | if (sector_div(temp, chunk)) | |
5248 | goto out_unlock; | |
c6207277 N |
5249 | } |
5250 | mddev->resync_max = max; | |
5251 | } | |
5252 | wake_up(&mddev->recovery_wait); | |
23da422b N |
5253 | err = 0; |
5254 | out_unlock: | |
5255 | spin_unlock(&mddev->lock); | |
5256 | return err ?: len; | |
c6207277 N |
5257 | } |
5258 | ||
5259 | static struct md_sysfs_entry md_max_sync = | |
5260 | __ATTR(sync_max, S_IRUGO|S_IWUSR, max_sync_show, max_sync_store); | |
5261 | ||
e464eafd | 5262 | static ssize_t |
fd01b88c | 5263 | suspend_lo_show(struct mddev *mddev, char *page) |
e464eafd | 5264 | { |
617787f1 YK |
5265 | return sprintf(page, "%llu\n", |
5266 | (unsigned long long)READ_ONCE(mddev->suspend_lo)); | |
e464eafd N |
5267 | } |
5268 | ||
5269 | static ssize_t | |
fd01b88c | 5270 | suspend_lo_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5271 | { |
b03e0ccb | 5272 | unsigned long long new; |
6791875e | 5273 | int err; |
e464eafd | 5274 | |
4c9309c0 AD |
5275 | err = kstrtoull(buf, 10, &new); |
5276 | if (err < 0) | |
5277 | return err; | |
5278 | if (new != (sector_t)new) | |
e464eafd | 5279 | return -EINVAL; |
23ddff37 | 5280 | |
2b16a525 | 5281 | err = mddev_suspend(mddev, true); |
6791875e N |
5282 | if (err) |
5283 | return err; | |
54d21eb6 | 5284 | |
617787f1 | 5285 | WRITE_ONCE(mddev->suspend_lo, new); |
b03e0ccb N |
5286 | mddev_resume(mddev); |
5287 | ||
54d21eb6 | 5288 | return len; |
e464eafd N |
5289 | } |
5290 | static struct md_sysfs_entry md_suspend_lo = | |
5291 | __ATTR(suspend_lo, S_IRUGO|S_IWUSR, suspend_lo_show, suspend_lo_store); | |
5292 | ||
e464eafd | 5293 | static ssize_t |
fd01b88c | 5294 | suspend_hi_show(struct mddev *mddev, char *page) |
e464eafd | 5295 | { |
617787f1 YK |
5296 | return sprintf(page, "%llu\n", |
5297 | (unsigned long long)READ_ONCE(mddev->suspend_hi)); | |
e464eafd N |
5298 | } |
5299 | ||
5300 | static ssize_t | |
fd01b88c | 5301 | suspend_hi_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5302 | { |
b03e0ccb | 5303 | unsigned long long new; |
6791875e | 5304 | int err; |
e464eafd | 5305 | |
4c9309c0 AD |
5306 | err = kstrtoull(buf, 10, &new); |
5307 | if (err < 0) | |
5308 | return err; | |
5309 | if (new != (sector_t)new) | |
e464eafd | 5310 | return -EINVAL; |
23ddff37 | 5311 | |
2b16a525 | 5312 | err = mddev_suspend(mddev, true); |
6791875e N |
5313 | if (err) |
5314 | return err; | |
b03e0ccb | 5315 | |
617787f1 | 5316 | WRITE_ONCE(mddev->suspend_hi, new); |
b03e0ccb N |
5317 | mddev_resume(mddev); |
5318 | ||
a2a9f168 | 5319 | return len; |
e464eafd N |
5320 | } |
5321 | static struct md_sysfs_entry md_suspend_hi = | |
5322 | __ATTR(suspend_hi, S_IRUGO|S_IWUSR, suspend_hi_show, suspend_hi_store); | |
5323 | ||
08a02ecd | 5324 | static ssize_t |
fd01b88c | 5325 | reshape_position_show(struct mddev *mddev, char *page) |
08a02ecd N |
5326 | { |
5327 | if (mddev->reshape_position != MaxSector) | |
5328 | return sprintf(page, "%llu\n", | |
5329 | (unsigned long long)mddev->reshape_position); | |
5330 | strcpy(page, "none\n"); | |
5331 | return 5; | |
5332 | } | |
5333 | ||
5334 | static ssize_t | |
fd01b88c | 5335 | reshape_position_store(struct mddev *mddev, const char *buf, size_t len) |
08a02ecd | 5336 | { |
c6563a8c | 5337 | struct md_rdev *rdev; |
4c9309c0 | 5338 | unsigned long long new; |
6791875e | 5339 | int err; |
6791875e | 5340 | |
4c9309c0 AD |
5341 | err = kstrtoull(buf, 10, &new); |
5342 | if (err < 0) | |
5343 | return err; | |
5344 | if (new != (sector_t)new) | |
08a02ecd | 5345 | return -EINVAL; |
6791875e N |
5346 | err = mddev_lock(mddev); |
5347 | if (err) | |
5348 | return err; | |
5349 | err = -EBUSY; | |
5350 | if (mddev->pers) | |
5351 | goto unlock; | |
08a02ecd N |
5352 | mddev->reshape_position = new; |
5353 | mddev->delta_disks = 0; | |
2c810cdd | 5354 | mddev->reshape_backwards = 0; |
08a02ecd N |
5355 | mddev->new_level = mddev->level; |
5356 | mddev->new_layout = mddev->layout; | |
664e7c41 | 5357 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
c6563a8c N |
5358 | rdev_for_each(rdev, mddev) |
5359 | rdev->new_data_offset = rdev->data_offset; | |
6791875e N |
5360 | err = 0; |
5361 | unlock: | |
5362 | mddev_unlock(mddev); | |
5363 | return err ?: len; | |
08a02ecd N |
5364 | } |
5365 | ||
5366 | static struct md_sysfs_entry md_reshape_position = | |
5367 | __ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show, | |
5368 | reshape_position_store); | |
5369 | ||
2c810cdd N |
5370 | static ssize_t |
5371 | reshape_direction_show(struct mddev *mddev, char *page) | |
5372 | { | |
5373 | return sprintf(page, "%s\n", | |
5374 | mddev->reshape_backwards ? "backwards" : "forwards"); | |
5375 | } | |
5376 | ||
5377 | static ssize_t | |
5378 | reshape_direction_store(struct mddev *mddev, const char *buf, size_t len) | |
5379 | { | |
5380 | int backwards = 0; | |
6791875e N |
5381 | int err; |
5382 | ||
2c810cdd N |
5383 | if (cmd_match(buf, "forwards")) |
5384 | backwards = 0; | |
5385 | else if (cmd_match(buf, "backwards")) | |
5386 | backwards = 1; | |
5387 | else | |
5388 | return -EINVAL; | |
5389 | if (mddev->reshape_backwards == backwards) | |
5390 | return len; | |
5391 | ||
6791875e N |
5392 | err = mddev_lock(mddev); |
5393 | if (err) | |
5394 | return err; | |
2c810cdd N |
5395 | /* check if we are allowed to change */ |
5396 | if (mddev->delta_disks) | |
6791875e N |
5397 | err = -EBUSY; |
5398 | else if (mddev->persistent && | |
2c810cdd | 5399 | mddev->major_version == 0) |
6791875e N |
5400 | err = -EINVAL; |
5401 | else | |
5402 | mddev->reshape_backwards = backwards; | |
5403 | mddev_unlock(mddev); | |
5404 | return err ?: len; | |
2c810cdd N |
5405 | } |
5406 | ||
5407 | static struct md_sysfs_entry md_reshape_direction = | |
5408 | __ATTR(reshape_direction, S_IRUGO|S_IWUSR, reshape_direction_show, | |
5409 | reshape_direction_store); | |
5410 | ||
b522adcd | 5411 | static ssize_t |
fd01b88c | 5412 | array_size_show(struct mddev *mddev, char *page) |
b522adcd DW |
5413 | { |
5414 | if (mddev->external_size) | |
5415 | return sprintf(page, "%llu\n", | |
5416 | (unsigned long long)mddev->array_sectors/2); | |
5417 | else | |
5418 | return sprintf(page, "default\n"); | |
5419 | } | |
5420 | ||
5421 | static ssize_t | |
fd01b88c | 5422 | array_size_store(struct mddev *mddev, const char *buf, size_t len) |
b522adcd DW |
5423 | { |
5424 | sector_t sectors; | |
6791875e N |
5425 | int err; |
5426 | ||
5427 | err = mddev_lock(mddev); | |
5428 | if (err) | |
5429 | return err; | |
b522adcd | 5430 | |
ab5a98b1 | 5431 | /* cluster raid doesn't support change array_sectors */ |
b670883b ZL |
5432 | if (mddev_is_clustered(mddev)) { |
5433 | mddev_unlock(mddev); | |
ab5a98b1 | 5434 | return -EINVAL; |
b670883b | 5435 | } |
ab5a98b1 | 5436 | |
b522adcd DW |
5437 | if (strncmp(buf, "default", 7) == 0) { |
5438 | if (mddev->pers) | |
5439 | sectors = mddev->pers->size(mddev, 0, 0); | |
5440 | else | |
5441 | sectors = mddev->array_sectors; | |
5442 | ||
5443 | mddev->external_size = 0; | |
5444 | } else { | |
5445 | if (strict_blocks_to_sectors(buf, §ors) < 0) | |
6791875e N |
5446 | err = -EINVAL; |
5447 | else if (mddev->pers && mddev->pers->size(mddev, 0, 0) < sectors) | |
5448 | err = -E2BIG; | |
5449 | else | |
5450 | mddev->external_size = 1; | |
b522adcd DW |
5451 | } |
5452 | ||
6791875e N |
5453 | if (!err) { |
5454 | mddev->array_sectors = sectors; | |
2c247c51 CH |
5455 | if (mddev->pers) |
5456 | set_capacity_and_notify(mddev->gendisk, | |
5457 | mddev->array_sectors); | |
cbe6ef1d | 5458 | } |
6791875e N |
5459 | mddev_unlock(mddev); |
5460 | return err ?: len; | |
b522adcd DW |
5461 | } |
5462 | ||
5463 | static struct md_sysfs_entry md_array_size = | |
5464 | __ATTR(array_size, S_IRUGO|S_IWUSR, array_size_show, | |
5465 | array_size_store); | |
e464eafd | 5466 | |
664aed04 AP |
5467 | static ssize_t |
5468 | consistency_policy_show(struct mddev *mddev, char *page) | |
5469 | { | |
5470 | int ret; | |
5471 | ||
5472 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) { | |
5473 | ret = sprintf(page, "journal\n"); | |
5474 | } else if (test_bit(MD_HAS_PPL, &mddev->flags)) { | |
5475 | ret = sprintf(page, "ppl\n"); | |
5476 | } else if (mddev->bitmap) { | |
5477 | ret = sprintf(page, "bitmap\n"); | |
5478 | } else if (mddev->pers) { | |
5479 | if (mddev->pers->sync_request) | |
5480 | ret = sprintf(page, "resync\n"); | |
5481 | else | |
5482 | ret = sprintf(page, "none\n"); | |
5483 | } else { | |
5484 | ret = sprintf(page, "unknown\n"); | |
5485 | } | |
5486 | ||
5487 | return ret; | |
5488 | } | |
5489 | ||
5490 | static ssize_t | |
5491 | consistency_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5492 | { | |
ba903a3e AP |
5493 | int err = 0; |
5494 | ||
664aed04 | 5495 | if (mddev->pers) { |
ba903a3e AP |
5496 | if (mddev->pers->change_consistency_policy) |
5497 | err = mddev->pers->change_consistency_policy(mddev, buf); | |
5498 | else | |
5499 | err = -EBUSY; | |
664aed04 AP |
5500 | } else if (mddev->external && strncmp(buf, "ppl", 3) == 0) { |
5501 | set_bit(MD_HAS_PPL, &mddev->flags); | |
664aed04 | 5502 | } else { |
ba903a3e | 5503 | err = -EINVAL; |
664aed04 | 5504 | } |
ba903a3e AP |
5505 | |
5506 | return err ? err : len; | |
664aed04 AP |
5507 | } |
5508 | ||
5509 | static struct md_sysfs_entry md_consistency_policy = | |
5510 | __ATTR(consistency_policy, S_IRUGO | S_IWUSR, consistency_policy_show, | |
5511 | consistency_policy_store); | |
5512 | ||
9a567843 GJ |
5513 | static ssize_t fail_last_dev_show(struct mddev *mddev, char *page) |
5514 | { | |
5515 | return sprintf(page, "%d\n", mddev->fail_last_dev); | |
5516 | } | |
5517 | ||
5518 | /* | |
5519 | * Setting fail_last_dev to true to allow last device to be forcibly removed | |
5520 | * from RAID1/RAID10. | |
5521 | */ | |
5522 | static ssize_t | |
5523 | fail_last_dev_store(struct mddev *mddev, const char *buf, size_t len) | |
5524 | { | |
5525 | int ret; | |
5526 | bool value; | |
5527 | ||
5528 | ret = kstrtobool(buf, &value); | |
5529 | if (ret) | |
5530 | return ret; | |
5531 | ||
5532 | if (value != mddev->fail_last_dev) | |
5533 | mddev->fail_last_dev = value; | |
5534 | ||
5535 | return len; | |
5536 | } | |
5537 | static struct md_sysfs_entry md_fail_last_dev = | |
5538 | __ATTR(fail_last_dev, S_IRUGO | S_IWUSR, fail_last_dev_show, | |
5539 | fail_last_dev_store); | |
5540 | ||
3938f5fb GJ |
5541 | static ssize_t serialize_policy_show(struct mddev *mddev, char *page) |
5542 | { | |
5543 | if (mddev->pers == NULL || (mddev->pers->level != 1)) | |
5544 | return sprintf(page, "n/a\n"); | |
5545 | else | |
5546 | return sprintf(page, "%d\n", mddev->serialize_policy); | |
5547 | } | |
5548 | ||
5549 | /* | |
5550 | * Setting serialize_policy to true to enforce write IO is not reordered | |
5551 | * for raid1. | |
5552 | */ | |
5553 | static ssize_t | |
5554 | serialize_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5555 | { | |
5556 | int err; | |
5557 | bool value; | |
5558 | ||
5559 | err = kstrtobool(buf, &value); | |
5560 | if (err) | |
5561 | return err; | |
5562 | ||
5563 | if (value == mddev->serialize_policy) | |
5564 | return len; | |
5565 | ||
205669f3 | 5566 | err = mddev_suspend_and_lock(mddev); |
3938f5fb GJ |
5567 | if (err) |
5568 | return err; | |
5569 | if (mddev->pers == NULL || (mddev->pers->level != 1)) { | |
5570 | pr_err("md: serialize_policy is only effective for raid1\n"); | |
5571 | err = -EINVAL; | |
5572 | goto unlock; | |
5573 | } | |
5574 | ||
3938f5fb | 5575 | if (value) |
b4128c00 | 5576 | mddev_create_serial_pool(mddev, NULL); |
3938f5fb | 5577 | else |
b4128c00 | 5578 | mddev_destroy_serial_pool(mddev, NULL); |
3938f5fb | 5579 | mddev->serialize_policy = value; |
3938f5fb | 5580 | unlock: |
205669f3 | 5581 | mddev_unlock_and_resume(mddev); |
3938f5fb GJ |
5582 | return err ?: len; |
5583 | } | |
5584 | ||
5585 | static struct md_sysfs_entry md_serialize_policy = | |
5586 | __ATTR(serialize_policy, S_IRUGO | S_IWUSR, serialize_policy_show, | |
5587 | serialize_policy_store); | |
5588 | ||
5589 | ||
eae1701f N |
5590 | static struct attribute *md_default_attrs[] = { |
5591 | &md_level.attr, | |
d4dbd025 | 5592 | &md_layout.attr, |
eae1701f | 5593 | &md_raid_disks.attr, |
ec164d07 | 5594 | &md_uuid.attr, |
3b34380a | 5595 | &md_chunk_size.attr, |
a35b0d69 | 5596 | &md_size.attr, |
a94213b1 | 5597 | &md_resync_start.attr, |
8bb93aac | 5598 | &md_metadata.attr, |
6d7ff738 | 5599 | &md_new_device.attr, |
16f17b39 | 5600 | &md_safe_delay.attr, |
9e653b63 | 5601 | &md_array_state.attr, |
08a02ecd | 5602 | &md_reshape_position.attr, |
2c810cdd | 5603 | &md_reshape_direction.attr, |
b522adcd | 5604 | &md_array_size.attr, |
1e50915f | 5605 | &max_corr_read_errors.attr, |
664aed04 | 5606 | &md_consistency_policy.attr, |
9a567843 | 5607 | &md_fail_last_dev.attr, |
3938f5fb | 5608 | &md_serialize_policy.attr, |
411036fa N |
5609 | NULL, |
5610 | }; | |
5611 | ||
51238e7f CH |
5612 | static const struct attribute_group md_default_group = { |
5613 | .attrs = md_default_attrs, | |
5614 | }; | |
5615 | ||
411036fa | 5616 | static struct attribute *md_redundancy_attrs[] = { |
24dd469d | 5617 | &md_scan_mode.attr, |
c4a39551 | 5618 | &md_last_scan_mode.attr, |
9d88883e | 5619 | &md_mismatches.attr, |
88202a0c N |
5620 | &md_sync_min.attr, |
5621 | &md_sync_max.attr, | |
5622 | &md_sync_speed.attr, | |
90b08710 | 5623 | &md_sync_force_parallel.attr, |
88202a0c | 5624 | &md_sync_completed.attr, |
5e96ee65 | 5625 | &md_min_sync.attr, |
c6207277 | 5626 | &md_max_sync.attr, |
e464eafd N |
5627 | &md_suspend_lo.attr, |
5628 | &md_suspend_hi.attr, | |
9b1d1dac | 5629 | &md_bitmap.attr, |
d7f3d291 | 5630 | &md_degraded.attr, |
eae1701f N |
5631 | NULL, |
5632 | }; | |
c32dc040 | 5633 | static const struct attribute_group md_redundancy_group = { |
411036fa N |
5634 | .name = NULL, |
5635 | .attrs = md_redundancy_attrs, | |
5636 | }; | |
5637 | ||
51238e7f CH |
5638 | static const struct attribute_group *md_attr_groups[] = { |
5639 | &md_default_group, | |
5640 | &md_bitmap_group, | |
5641 | NULL, | |
5642 | }; | |
5643 | ||
eae1701f N |
5644 | static ssize_t |
5645 | md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
5646 | { | |
5647 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5648 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5649 | ssize_t rv; |
eae1701f N |
5650 | |
5651 | if (!entry->show) | |
5652 | return -EIO; | |
af8a2434 | 5653 | spin_lock(&all_mddevs_lock); |
12a6caf2 | 5654 | if (!mddev_get(mddev)) { |
af8a2434 N |
5655 | spin_unlock(&all_mddevs_lock); |
5656 | return -EBUSY; | |
5657 | } | |
af8a2434 N |
5658 | spin_unlock(&all_mddevs_lock); |
5659 | ||
b7b17c9b | 5660 | rv = entry->show(mddev, page); |
af8a2434 | 5661 | mddev_put(mddev); |
96de1e66 | 5662 | return rv; |
eae1701f N |
5663 | } |
5664 | ||
5665 | static ssize_t | |
5666 | md_attr_store(struct kobject *kobj, struct attribute *attr, | |
5667 | const char *page, size_t length) | |
5668 | { | |
5669 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5670 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5671 | ssize_t rv; |
eae1701f N |
5672 | |
5673 | if (!entry->store) | |
5674 | return -EIO; | |
67463acb N |
5675 | if (!capable(CAP_SYS_ADMIN)) |
5676 | return -EACCES; | |
af8a2434 | 5677 | spin_lock(&all_mddevs_lock); |
12a6caf2 | 5678 | if (!mddev_get(mddev)) { |
af8a2434 N |
5679 | spin_unlock(&all_mddevs_lock); |
5680 | return -EBUSY; | |
5681 | } | |
af8a2434 | 5682 | spin_unlock(&all_mddevs_lock); |
6791875e | 5683 | rv = entry->store(mddev, page, length); |
af8a2434 | 5684 | mddev_put(mddev); |
96de1e66 | 5685 | return rv; |
eae1701f N |
5686 | } |
5687 | ||
33b614e3 | 5688 | static void md_kobj_release(struct kobject *ko) |
eae1701f | 5689 | { |
fd01b88c | 5690 | struct mddev *mddev = container_of(ko, struct mddev, kobj); |
a21d1504 N |
5691 | |
5692 | if (mddev->sysfs_state) | |
5693 | sysfs_put(mddev->sysfs_state); | |
e1a86dbb JB |
5694 | if (mddev->sysfs_level) |
5695 | sysfs_put(mddev->sysfs_level); | |
5696 | ||
ca39f750 CH |
5697 | del_gendisk(mddev->gendisk); |
5698 | put_disk(mddev->gendisk); | |
eae1701f N |
5699 | } |
5700 | ||
52cf25d0 | 5701 | static const struct sysfs_ops md_sysfs_ops = { |
eae1701f N |
5702 | .show = md_attr_show, |
5703 | .store = md_attr_store, | |
5704 | }; | |
4d72a9de | 5705 | static const struct kobj_type md_ktype = { |
33b614e3 | 5706 | .release = md_kobj_release, |
eae1701f | 5707 | .sysfs_ops = &md_sysfs_ops, |
51238e7f | 5708 | .default_groups = md_attr_groups, |
eae1701f N |
5709 | }; |
5710 | ||
1da177e4 LT |
5711 | int mdp_major = 0; |
5712 | ||
5fd3a17e DW |
5713 | static void mddev_delayed_delete(struct work_struct *ws) |
5714 | { | |
fd01b88c | 5715 | struct mddev *mddev = container_of(ws, struct mddev, del_work); |
5fd3a17e | 5716 | |
5fd3a17e DW |
5717 | kobject_put(&mddev->kobj); |
5718 | } | |
5719 | ||
34cb92c0 | 5720 | struct mddev *md_alloc(dev_t dev, char *name) |
1da177e4 | 5721 | { |
039b7225 N |
5722 | /* |
5723 | * If dev is zero, name is the name of a device to allocate with | |
5724 | * an arbitrary minor number. It will be "md_???" | |
5725 | * If dev is non-zero it must be a device number with a MAJOR of | |
5726 | * MD_MAJOR or mdp_major. In this case, if "name" is NULL, then | |
5727 | * the device is being created by opening a node in /dev. | |
5728 | * If "name" is not NULL, the device is being created by | |
5729 | * writing to /sys/module/md_mod/parameters/new_array. | |
5730 | */ | |
48c9c27b | 5731 | static DEFINE_MUTEX(disks_mutex); |
0d809b38 | 5732 | struct mddev *mddev; |
1da177e4 | 5733 | struct gendisk *disk; |
efeb53c0 N |
5734 | int partitioned; |
5735 | int shift; | |
5736 | int unit; | |
0d809b38 | 5737 | int error ; |
efeb53c0 | 5738 | |
0d809b38 CH |
5739 | /* |
5740 | * Wait for any previous instance of this device to be completely | |
5741 | * removed (mddev_delayed_delete). | |
d3374825 | 5742 | */ |
e804ac78 | 5743 | flush_workqueue(md_misc_wq); |
d3374825 | 5744 | |
48c9c27b | 5745 | mutex_lock(&disks_mutex); |
0d809b38 CH |
5746 | mddev = mddev_alloc(dev); |
5747 | if (IS_ERR(mddev)) { | |
c57094a6 CH |
5748 | error = PTR_ERR(mddev); |
5749 | goto out_unlock; | |
0d809b38 CH |
5750 | } |
5751 | ||
5752 | partitioned = (MAJOR(mddev->unit) != MD_MAJOR); | |
5753 | shift = partitioned ? MdpMinorShift : 0; | |
5754 | unit = MINOR(mddev->unit) >> shift; | |
efeb53c0 | 5755 | |
039b7225 | 5756 | if (name && !dev) { |
efeb53c0 N |
5757 | /* Need to ensure that 'name' is not a duplicate. |
5758 | */ | |
fd01b88c | 5759 | struct mddev *mddev2; |
efeb53c0 N |
5760 | spin_lock(&all_mddevs_lock); |
5761 | ||
5762 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) | |
5763 | if (mddev2->gendisk && | |
5764 | strcmp(mddev2->gendisk->disk_name, name) == 0) { | |
5765 | spin_unlock(&all_mddevs_lock); | |
0d809b38 | 5766 | error = -EEXIST; |
c57094a6 | 5767 | goto out_free_mddev; |
efeb53c0 N |
5768 | } |
5769 | spin_unlock(&all_mddevs_lock); | |
1da177e4 | 5770 | } |
039b7225 N |
5771 | if (name && dev) |
5772 | /* | |
5773 | * Creating /dev/mdNNN via "newarray", so adjust hold_active. | |
5774 | */ | |
5775 | mddev->hold_active = UNTIL_STOP; | |
8b765398 | 5776 | |
0909dc44 | 5777 | error = -ENOMEM; |
0f1d2e06 CH |
5778 | disk = blk_alloc_disk(NUMA_NO_NODE); |
5779 | if (!disk) | |
c57094a6 | 5780 | goto out_free_mddev; |
409c57f3 | 5781 | |
efeb53c0 | 5782 | disk->major = MAJOR(mddev->unit); |
1da177e4 | 5783 | disk->first_minor = unit << shift; |
0f1d2e06 | 5784 | disk->minors = 1 << shift; |
efeb53c0 N |
5785 | if (name) |
5786 | strcpy(disk->disk_name, name); | |
5787 | else if (partitioned) | |
1da177e4 | 5788 | sprintf(disk->disk_name, "md_d%d", unit); |
ce7b0f46 | 5789 | else |
1da177e4 | 5790 | sprintf(disk->disk_name, "md%d", unit); |
1da177e4 LT |
5791 | disk->fops = &md_fops; |
5792 | disk->private_data = mddev; | |
0f1d2e06 CH |
5793 | |
5794 | mddev->queue = disk->queue; | |
5795 | blk_set_stacking_limits(&mddev->queue->limits); | |
56883a7e | 5796 | blk_queue_write_cache(mddev->queue, true, true); |
a564e23f | 5797 | disk->events |= DISK_EVENT_MEDIA_CHANGE; |
1da177e4 | 5798 | mddev->gendisk = disk; |
9be68dd7 | 5799 | error = add_disk(disk); |
7ad10691 | 5800 | if (error) |
c57094a6 | 5801 | goto out_put_disk; |
b0140891 | 5802 | |
ca39f750 | 5803 | kobject_init(&mddev->kobj, &md_ktype); |
28dec870 | 5804 | error = kobject_add(&mddev->kobj, &disk_to_dev(disk)->kobj, "%s", "md"); |
c57094a6 CH |
5805 | if (error) { |
5806 | /* | |
5807 | * The disk is already live at this point. Clear the hold flag | |
5808 | * and let mddev_put take care of the deletion, as it isn't any | |
5809 | * different from a normal close on last release now. | |
5810 | */ | |
5811 | mddev->hold_active = 0; | |
34cb92c0 CH |
5812 | mutex_unlock(&disks_mutex); |
5813 | mddev_put(mddev); | |
5814 | return ERR_PTR(error); | |
c57094a6 | 5815 | } |
7ad10691 CH |
5816 | |
5817 | kobject_uevent(&mddev->kobj, KOBJ_ADD); | |
5818 | mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state"); | |
5819 | mddev->sysfs_level = sysfs_get_dirent_safe(mddev->kobj.sd, "level"); | |
94f3cd7d | 5820 | mutex_unlock(&disks_mutex); |
34cb92c0 | 5821 | return mddev; |
c57094a6 CH |
5822 | |
5823 | out_put_disk: | |
5824 | put_disk(disk); | |
5825 | out_free_mddev: | |
5826 | mddev_free(mddev); | |
5827 | out_unlock: | |
5828 | mutex_unlock(&disks_mutex); | |
34cb92c0 CH |
5829 | return ERR_PTR(error); |
5830 | } | |
5831 | ||
5832 | static int md_alloc_and_put(dev_t dev, char *name) | |
5833 | { | |
5834 | struct mddev *mddev = md_alloc(dev, name); | |
5835 | ||
5836 | if (IS_ERR(mddev)) | |
5837 | return PTR_ERR(mddev); | |
5838 | mddev_put(mddev); | |
5839 | return 0; | |
efeb53c0 N |
5840 | } |
5841 | ||
28144f99 | 5842 | static void md_probe(dev_t dev) |
efeb53c0 | 5843 | { |
28144f99 CH |
5844 | if (MAJOR(dev) == MD_MAJOR && MINOR(dev) >= 512) |
5845 | return; | |
78b6350d | 5846 | if (create_on_open) |
34cb92c0 | 5847 | md_alloc_and_put(dev, NULL); |
1da177e4 LT |
5848 | } |
5849 | ||
e4dca7b7 | 5850 | static int add_named_array(const char *val, const struct kernel_param *kp) |
efeb53c0 | 5851 | { |
039b7225 N |
5852 | /* |
5853 | * val must be "md_*" or "mdNNN". | |
5854 | * For "md_*" we allocate an array with a large free minor number, and | |
efeb53c0 | 5855 | * set the name to val. val must not already be an active name. |
039b7225 N |
5856 | * For "mdNNN" we allocate an array with the minor number NNN |
5857 | * which must not already be in use. | |
efeb53c0 N |
5858 | */ |
5859 | int len = strlen(val); | |
5860 | char buf[DISK_NAME_LEN]; | |
039b7225 | 5861 | unsigned long devnum; |
efeb53c0 N |
5862 | |
5863 | while (len && val[len-1] == '\n') | |
5864 | len--; | |
5865 | if (len >= DISK_NAME_LEN) | |
5866 | return -E2BIG; | |
92d9aac9 | 5867 | strscpy(buf, val, len+1); |
039b7225 | 5868 | if (strncmp(buf, "md_", 3) == 0) |
34cb92c0 | 5869 | return md_alloc_and_put(0, buf); |
039b7225 N |
5870 | if (strncmp(buf, "md", 2) == 0 && |
5871 | isdigit(buf[2]) && | |
5872 | kstrtoul(buf+2, 10, &devnum) == 0 && | |
5873 | devnum <= MINORMASK) | |
34cb92c0 | 5874 | return md_alloc_and_put(MKDEV(MD_MAJOR, devnum), NULL); |
039b7225 N |
5875 | |
5876 | return -EINVAL; | |
efeb53c0 N |
5877 | } |
5878 | ||
8376d3c1 | 5879 | static void md_safemode_timeout(struct timer_list *t) |
1da177e4 | 5880 | { |
8376d3c1 | 5881 | struct mddev *mddev = from_timer(mddev, t, safemode_timer); |
1da177e4 | 5882 | |
4ad23a97 N |
5883 | mddev->safemode = 1; |
5884 | if (mddev->external) | |
5885 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
5886 | ||
1da177e4 LT |
5887 | md_wakeup_thread(mddev->thread); |
5888 | } | |
5889 | ||
6ff8d8ec | 5890 | static int start_dirty_degraded; |
1da177e4 | 5891 | |
fd01b88c | 5892 | int md_run(struct mddev *mddev) |
1da177e4 | 5893 | { |
2604b703 | 5894 | int err; |
3cb03002 | 5895 | struct md_rdev *rdev; |
84fc4b56 | 5896 | struct md_personality *pers; |
f51d46d0 | 5897 | bool nowait = true; |
1da177e4 | 5898 | |
a757e64c N |
5899 | if (list_empty(&mddev->disks)) |
5900 | /* cannot run an array with no devices.. */ | |
1da177e4 | 5901 | return -EINVAL; |
1da177e4 LT |
5902 | |
5903 | if (mddev->pers) | |
5904 | return -EBUSY; | |
bb4f1e9d N |
5905 | /* Cannot run until previous stop completes properly */ |
5906 | if (mddev->sysfs_active) | |
5907 | return -EBUSY; | |
b6eb127d | 5908 | |
1da177e4 LT |
5909 | /* |
5910 | * Analyze all RAID superblock(s) | |
5911 | */ | |
1ec4a939 N |
5912 | if (!mddev->raid_disks) { |
5913 | if (!mddev->persistent) | |
5914 | return -EINVAL; | |
6a5cb53a YY |
5915 | err = analyze_sbs(mddev); |
5916 | if (err) | |
5917 | return -EINVAL; | |
1ec4a939 | 5918 | } |
1da177e4 | 5919 | |
d9d166c2 N |
5920 | if (mddev->level != LEVEL_NONE) |
5921 | request_module("md-level-%d", mddev->level); | |
5922 | else if (mddev->clevel[0]) | |
5923 | request_module("md-%s", mddev->clevel); | |
1da177e4 LT |
5924 | |
5925 | /* | |
5926 | * Drop all container device buffers, from now on | |
5927 | * the only valid external interface is through the md | |
5928 | * device. | |
1da177e4 | 5929 | */ |
4b6c1060 | 5930 | mddev->has_superblocks = false; |
dafb20fa | 5931 | rdev_for_each(rdev, mddev) { |
b2d444d7 | 5932 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
5933 | continue; |
5934 | sync_blockdev(rdev->bdev); | |
f98393a6 | 5935 | invalidate_bdev(rdev->bdev); |
f97a5528 YB |
5936 | if (mddev->ro != MD_RDONLY && rdev_read_only(rdev)) { |
5937 | mddev->ro = MD_RDONLY; | |
97b20ef7 N |
5938 | if (mddev->gendisk) |
5939 | set_disk_ro(mddev->gendisk, 1); | |
5940 | } | |
f0d76d70 | 5941 | |
4b6c1060 HM |
5942 | if (rdev->sb_page) |
5943 | mddev->has_superblocks = true; | |
5944 | ||
f0d76d70 N |
5945 | /* perform some consistency tests on the device. |
5946 | * We don't want the data to overlap the metadata, | |
58c0fed4 | 5947 | * Internal Bitmap issues have been handled elsewhere. |
f0d76d70 | 5948 | */ |
a6ff7e08 JB |
5949 | if (rdev->meta_bdev) { |
5950 | /* Nothing to check */; | |
5951 | } else if (rdev->data_offset < rdev->sb_start) { | |
58c0fed4 AN |
5952 | if (mddev->dev_sectors && |
5953 | rdev->data_offset + mddev->dev_sectors | |
0f420358 | 5954 | > rdev->sb_start) { |
9d48739e N |
5955 | pr_warn("md: %s: data overlaps metadata\n", |
5956 | mdname(mddev)); | |
f0d76d70 N |
5957 | return -EINVAL; |
5958 | } | |
5959 | } else { | |
0f420358 | 5960 | if (rdev->sb_start + rdev->sb_size/512 |
f0d76d70 | 5961 | > rdev->data_offset) { |
9d48739e N |
5962 | pr_warn("md: %s: metadata overlaps data\n", |
5963 | mdname(mddev)); | |
f0d76d70 N |
5964 | return -EINVAL; |
5965 | } | |
5966 | } | |
00bcb4ac | 5967 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
568ec936 | 5968 | nowait = nowait && bdev_nowait(rdev->bdev); |
1da177e4 LT |
5969 | } |
5970 | ||
afeee514 KO |
5971 | if (!bioset_initialized(&mddev->bio_set)) { |
5972 | err = bioset_init(&mddev->bio_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5973 | if (err) | |
d58eff83 | 5974 | return err; |
10273170 | 5975 | } |
afeee514 KO |
5976 | if (!bioset_initialized(&mddev->sync_set)) { |
5977 | err = bioset_init(&mddev->sync_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5978 | if (err) | |
10764815 GJ |
5979 | goto exit_bio_set; |
5980 | } | |
a167f663 | 5981 | |
c687297b YK |
5982 | if (!bioset_initialized(&mddev->io_clone_set)) { |
5983 | err = bioset_init(&mddev->io_clone_set, BIO_POOL_SIZE, | |
5984 | offsetof(struct md_io_clone, bio_clone), 0); | |
c567c86b YK |
5985 | if (err) |
5986 | goto exit_sync_set; | |
5987 | } | |
5988 | ||
1da177e4 | 5989 | spin_lock(&pers_lock); |
d9d166c2 | 5990 | pers = find_pers(mddev->level, mddev->clevel); |
2604b703 | 5991 | if (!pers || !try_module_get(pers->owner)) { |
1da177e4 | 5992 | spin_unlock(&pers_lock); |
d9d166c2 | 5993 | if (mddev->level != LEVEL_NONE) |
9d48739e N |
5994 | pr_warn("md: personality for level %d is not loaded!\n", |
5995 | mddev->level); | |
d9d166c2 | 5996 | else |
9d48739e N |
5997 | pr_warn("md: personality for level %s is not loaded!\n", |
5998 | mddev->clevel); | |
bfc9dfdc SL |
5999 | err = -EINVAL; |
6000 | goto abort; | |
1da177e4 | 6001 | } |
1da177e4 | 6002 | spin_unlock(&pers_lock); |
34817e8c N |
6003 | if (mddev->level != pers->level) { |
6004 | mddev->level = pers->level; | |
6005 | mddev->new_level = pers->level; | |
6006 | } | |
92d9aac9 | 6007 | strscpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
1da177e4 | 6008 | |
f6705578 | 6009 | if (mddev->reshape_position != MaxSector && |
63c70c4f | 6010 | pers->start_reshape == NULL) { |
f6705578 | 6011 | /* This personality cannot handle reshaping... */ |
f6705578 | 6012 | module_put(pers->owner); |
bfc9dfdc SL |
6013 | err = -EINVAL; |
6014 | goto abort; | |
f6705578 N |
6015 | } |
6016 | ||
7dd5e7c3 N |
6017 | if (pers->sync_request) { |
6018 | /* Warn if this is a potentially silly | |
6019 | * configuration. | |
6020 | */ | |
3cb03002 | 6021 | struct md_rdev *rdev2; |
7dd5e7c3 | 6022 | int warned = 0; |
159ec1fc | 6023 | |
dafb20fa N |
6024 | rdev_for_each(rdev, mddev) |
6025 | rdev_for_each(rdev2, mddev) { | |
7dd5e7c3 | 6026 | if (rdev < rdev2 && |
61a27e1f CH |
6027 | rdev->bdev->bd_disk == |
6028 | rdev2->bdev->bd_disk) { | |
913cce5a | 6029 | pr_warn("%s: WARNING: %pg appears to be on the same physical disk as %pg.\n", |
9d48739e | 6030 | mdname(mddev), |
913cce5a CH |
6031 | rdev->bdev, |
6032 | rdev2->bdev); | |
7dd5e7c3 N |
6033 | warned = 1; |
6034 | } | |
6035 | } | |
159ec1fc | 6036 | |
7dd5e7c3 | 6037 | if (warned) |
9d48739e | 6038 | pr_warn("True protection against single-disk failure might be compromised.\n"); |
7dd5e7c3 N |
6039 | } |
6040 | ||
657390d2 | 6041 | mddev->recovery = 0; |
58c0fed4 AN |
6042 | /* may be over-ridden by personality */ |
6043 | mddev->resync_max_sectors = mddev->dev_sectors; | |
6044 | ||
6ff8d8ec | 6045 | mddev->ok_start_degraded = start_dirty_degraded; |
1da177e4 | 6046 | |
f97a5528 YB |
6047 | if (start_readonly && md_is_rdwr(mddev)) |
6048 | mddev->ro = MD_AUTO_READ; /* read-only, but switch on first write */ | |
f91de92e | 6049 | |
36d091f4 | 6050 | err = pers->run(mddev); |
13e53df3 | 6051 | if (err) |
9d48739e | 6052 | pr_warn("md: pers->run() failed ...\n"); |
36d091f4 | 6053 | else if (pers->size(mddev, 0, 0) < mddev->array_sectors) { |
9d48739e N |
6054 | WARN_ONCE(!mddev->external_size, |
6055 | "%s: default size too small, but 'external_size' not in effect?\n", | |
6056 | __func__); | |
6057 | pr_warn("md: invalid array_size %llu > default size %llu\n", | |
6058 | (unsigned long long)mddev->array_sectors / 2, | |
6059 | (unsigned long long)pers->size(mddev, 0, 0) / 2); | |
b522adcd | 6060 | err = -EINVAL; |
b522adcd | 6061 | } |
36d091f4 | 6062 | if (err == 0 && pers->sync_request && |
ef99bf48 | 6063 | (mddev->bitmap_info.file || mddev->bitmap_info.offset)) { |
f9209a32 GR |
6064 | struct bitmap *bitmap; |
6065 | ||
e64e4018 | 6066 | bitmap = md_bitmap_create(mddev, -1); |
f9209a32 GR |
6067 | if (IS_ERR(bitmap)) { |
6068 | err = PTR_ERR(bitmap); | |
9d48739e N |
6069 | pr_warn("%s: failed to create bitmap (%d)\n", |
6070 | mdname(mddev), err); | |
f9209a32 GR |
6071 | } else |
6072 | mddev->bitmap = bitmap; | |
6073 | ||
b15c2e57 | 6074 | } |
d494549a GJ |
6075 | if (err) |
6076 | goto bitmap_abort; | |
3e148a32 GJ |
6077 | |
6078 | if (mddev->bitmap_info.max_write_behind > 0) { | |
3e173ab5 | 6079 | bool create_pool = false; |
3e148a32 GJ |
6080 | |
6081 | rdev_for_each(rdev, mddev) { | |
6082 | if (test_bit(WriteMostly, &rdev->flags) && | |
404659cf | 6083 | rdev_init_serial(rdev)) |
3e173ab5 | 6084 | create_pool = true; |
3e148a32 | 6085 | } |
3e173ab5 | 6086 | if (create_pool && mddev->serial_info_pool == NULL) { |
404659cf GJ |
6087 | mddev->serial_info_pool = |
6088 | mempool_create_kmalloc_pool(NR_SERIAL_INFOS, | |
6089 | sizeof(struct serial_info)); | |
6090 | if (!mddev->serial_info_pool) { | |
3e148a32 | 6091 | err = -ENOMEM; |
d494549a | 6092 | goto bitmap_abort; |
3e148a32 GJ |
6093 | } |
6094 | } | |
6095 | } | |
6096 | ||
5c675f83 | 6097 | if (mddev->queue) { |
bb086a89 SL |
6098 | bool nonrot = true; |
6099 | ||
6100 | rdev_for_each(rdev, mddev) { | |
10f0d2a5 | 6101 | if (rdev->raid_disk >= 0 && !bdev_nonrot(rdev->bdev)) { |
bb086a89 SL |
6102 | nonrot = false; |
6103 | break; | |
6104 | } | |
6105 | } | |
6106 | if (mddev->degraded) | |
6107 | nonrot = false; | |
6108 | if (nonrot) | |
8b904b5b | 6109 | blk_queue_flag_set(QUEUE_FLAG_NONROT, mddev->queue); |
bb086a89 | 6110 | else |
8b904b5b | 6111 | blk_queue_flag_clear(QUEUE_FLAG_NONROT, mddev->queue); |
10764815 | 6112 | blk_queue_flag_set(QUEUE_FLAG_IO_STAT, mddev->queue); |
0f9650bd SL |
6113 | |
6114 | /* Set the NOWAIT flags if all underlying devices support it */ | |
6115 | if (nowait) | |
6116 | blk_queue_flag_set(QUEUE_FLAG_NOWAIT, mddev->queue); | |
5c675f83 | 6117 | } |
36d091f4 | 6118 | if (pers->sync_request) { |
00bcb4ac N |
6119 | if (mddev->kobj.sd && |
6120 | sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
6121 | pr_warn("md: cannot register extra attributes for %s\n", |
6122 | mdname(mddev)); | |
00bcb4ac | 6123 | mddev->sysfs_action = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_action"); |
e8efa9b8 JB |
6124 | mddev->sysfs_completed = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_completed"); |
6125 | mddev->sysfs_degraded = sysfs_get_dirent_safe(mddev->kobj.sd, "degraded"); | |
f97a5528 YB |
6126 | } else if (mddev->ro == MD_AUTO_READ) |
6127 | mddev->ro = MD_RDWR; | |
fd9d49ca | 6128 | |
1e50915f RB |
6129 | atomic_set(&mddev->max_corr_read_errors, |
6130 | MD_DEFAULT_MAX_CORRECTED_READ_ERRORS); | |
1da177e4 | 6131 | mddev->safemode = 0; |
28c1b9fd GR |
6132 | if (mddev_is_clustered(mddev)) |
6133 | mddev->safemode_delay = 0; | |
6134 | else | |
7c9d5c54 | 6135 | mddev->safemode_delay = DEFAULT_SAFEMODE_DELAY; |
1da177e4 | 6136 | mddev->in_sync = 1; |
0ca69886 | 6137 | smp_wmb(); |
36d091f4 N |
6138 | spin_lock(&mddev->lock); |
6139 | mddev->pers = pers; | |
36d091f4 | 6140 | spin_unlock(&mddev->lock); |
dafb20fa | 6141 | rdev_for_each(rdev, mddev) |
36fad858 | 6142 | if (rdev->raid_disk >= 0) |
e5b521ee | 6143 | sysfs_link_rdev(mddev, rdev); /* failure here is OK */ |
f72ffdd6 | 6144 | |
f97a5528 | 6145 | if (mddev->degraded && md_is_rdwr(mddev)) |
a4a3d26d N |
6146 | /* This ensures that recovering status is reported immediately |
6147 | * via sysfs - until a lack of spares is confirmed. | |
6148 | */ | |
6149 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
1da177e4 | 6150 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f72ffdd6 | 6151 | |
2953079c | 6152 | if (mddev->sb_flags) |
850b2b42 | 6153 | md_update_sb(mddev, 0); |
1da177e4 | 6154 | |
54679486 | 6155 | md_new_event(); |
1da177e4 | 6156 | return 0; |
b126194c | 6157 | |
d494549a GJ |
6158 | bitmap_abort: |
6159 | mddev_detach(mddev); | |
6160 | if (mddev->private) | |
6161 | pers->free(mddev, mddev->private); | |
6162 | mddev->private = NULL; | |
6163 | module_put(pers->owner); | |
6164 | md_bitmap_destroy(mddev); | |
b126194c | 6165 | abort: |
c687297b | 6166 | bioset_exit(&mddev->io_clone_set); |
c567c86b | 6167 | exit_sync_set: |
4bc034d3 | 6168 | bioset_exit(&mddev->sync_set); |
10764815 GJ |
6169 | exit_bio_set: |
6170 | bioset_exit(&mddev->bio_set); | |
b126194c | 6171 | return err; |
1da177e4 | 6172 | } |
390ee602 | 6173 | EXPORT_SYMBOL_GPL(md_run); |
1da177e4 | 6174 | |
7e0adbfc | 6175 | int do_md_run(struct mddev *mddev) |
fe60b014 N |
6176 | { |
6177 | int err; | |
6178 | ||
9d4b45d6 | 6179 | set_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
6180 | err = md_run(mddev); |
6181 | if (err) | |
6182 | goto out; | |
e64e4018 | 6183 | err = md_bitmap_load(mddev); |
69e51b44 | 6184 | if (err) { |
e64e4018 | 6185 | md_bitmap_destroy(mddev); |
69e51b44 N |
6186 | goto out; |
6187 | } | |
0fd018af | 6188 | |
28c1b9fd GR |
6189 | if (mddev_is_clustered(mddev)) |
6190 | md_allow_write(mddev); | |
6191 | ||
d5d885fd SL |
6192 | /* run start up tasks that require md_thread */ |
6193 | md_start(mddev); | |
6194 | ||
0fd018af JB |
6195 | md_wakeup_thread(mddev->thread); |
6196 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
6197 | ||
2c247c51 | 6198 | set_capacity_and_notify(mddev->gendisk, mddev->array_sectors); |
9d4b45d6 | 6199 | clear_bit(MD_NOT_READY, &mddev->flags); |
f0b4f7e2 | 6200 | mddev->changed = 1; |
fe60b014 | 6201 | kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); |
9d4b45d6 N |
6202 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6203 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
e1a86dbb | 6204 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
fe60b014 | 6205 | out: |
9d4b45d6 | 6206 | clear_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
6207 | return err; |
6208 | } | |
6209 | ||
d5d885fd SL |
6210 | int md_start(struct mddev *mddev) |
6211 | { | |
6212 | int ret = 0; | |
6213 | ||
6214 | if (mddev->pers->start) { | |
6215 | set_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
6216 | md_wakeup_thread(mddev->thread); | |
6217 | ret = mddev->pers->start(mddev); | |
6218 | clear_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
6219 | md_wakeup_thread(mddev->sync_thread); | |
6220 | } | |
6221 | return ret; | |
6222 | } | |
6223 | EXPORT_SYMBOL_GPL(md_start); | |
6224 | ||
fd01b88c | 6225 | static int restart_array(struct mddev *mddev) |
1da177e4 LT |
6226 | { |
6227 | struct gendisk *disk = mddev->gendisk; | |
97b20ef7 N |
6228 | struct md_rdev *rdev; |
6229 | bool has_journal = false; | |
6230 | bool has_readonly = false; | |
1da177e4 | 6231 | |
80fab1d7 | 6232 | /* Complain if it has no devices */ |
1da177e4 | 6233 | if (list_empty(&mddev->disks)) |
80fab1d7 AN |
6234 | return -ENXIO; |
6235 | if (!mddev->pers) | |
6236 | return -EINVAL; | |
f97a5528 | 6237 | if (md_is_rdwr(mddev)) |
80fab1d7 | 6238 | return -EBUSY; |
339421de | 6239 | |
97b20ef7 N |
6240 | rcu_read_lock(); |
6241 | rdev_for_each_rcu(rdev, mddev) { | |
6242 | if (test_bit(Journal, &rdev->flags) && | |
6243 | !test_bit(Faulty, &rdev->flags)) | |
6244 | has_journal = true; | |
a42e0d70 | 6245 | if (rdev_read_only(rdev)) |
97b20ef7 N |
6246 | has_readonly = true; |
6247 | } | |
6248 | rcu_read_unlock(); | |
6249 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags) && !has_journal) | |
339421de | 6250 | /* Don't restart rw with journal missing/faulty */ |
339421de | 6251 | return -EINVAL; |
97b20ef7 N |
6252 | if (has_readonly) |
6253 | return -EROFS; | |
339421de | 6254 | |
80fab1d7 | 6255 | mddev->safemode = 0; |
f97a5528 | 6256 | mddev->ro = MD_RDWR; |
80fab1d7 | 6257 | set_disk_ro(disk, 0); |
9d48739e | 6258 | pr_debug("md: %s switched to read-write mode.\n", mdname(mddev)); |
80fab1d7 AN |
6259 | /* Kick recovery or resync if necessary */ |
6260 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6261 | md_wakeup_thread(mddev->thread); | |
6262 | md_wakeup_thread(mddev->sync_thread); | |
00bcb4ac | 6263 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
80fab1d7 | 6264 | return 0; |
1da177e4 LT |
6265 | } |
6266 | ||
fd01b88c | 6267 | static void md_clean(struct mddev *mddev) |
6177b472 N |
6268 | { |
6269 | mddev->array_sectors = 0; | |
6270 | mddev->external_size = 0; | |
6271 | mddev->dev_sectors = 0; | |
6272 | mddev->raid_disks = 0; | |
6273 | mddev->recovery_cp = 0; | |
6274 | mddev->resync_min = 0; | |
6275 | mddev->resync_max = MaxSector; | |
6276 | mddev->reshape_position = MaxSector; | |
a1d76719 | 6277 | /* we still need mddev->external in export_rdev, do not clear it yet */ |
6177b472 N |
6278 | mddev->persistent = 0; |
6279 | mddev->level = LEVEL_NONE; | |
6280 | mddev->clevel[0] = 0; | |
6281 | mddev->flags = 0; | |
2953079c | 6282 | mddev->sb_flags = 0; |
f97a5528 | 6283 | mddev->ro = MD_RDWR; |
6177b472 N |
6284 | mddev->metadata_type[0] = 0; |
6285 | mddev->chunk_sectors = 0; | |
6286 | mddev->ctime = mddev->utime = 0; | |
6287 | mddev->layout = 0; | |
6288 | mddev->max_disks = 0; | |
6289 | mddev->events = 0; | |
a8707c08 | 6290 | mddev->can_decrease_events = 0; |
6177b472 | 6291 | mddev->delta_disks = 0; |
2c810cdd | 6292 | mddev->reshape_backwards = 0; |
6177b472 N |
6293 | mddev->new_level = LEVEL_NONE; |
6294 | mddev->new_layout = 0; | |
6295 | mddev->new_chunk_sectors = 0; | |
ed821cf8 | 6296 | mddev->curr_resync = MD_RESYNC_NONE; |
7f7583d4 | 6297 | atomic64_set(&mddev->resync_mismatches, 0); |
6177b472 N |
6298 | mddev->suspend_lo = mddev->suspend_hi = 0; |
6299 | mddev->sync_speed_min = mddev->sync_speed_max = 0; | |
6300 | mddev->recovery = 0; | |
6301 | mddev->in_sync = 0; | |
f0b4f7e2 | 6302 | mddev->changed = 0; |
6177b472 | 6303 | mddev->degraded = 0; |
6177b472 | 6304 | mddev->safemode = 0; |
bd691922 | 6305 | mddev->private = NULL; |
c20c33f0 | 6306 | mddev->cluster_info = NULL; |
6177b472 N |
6307 | mddev->bitmap_info.offset = 0; |
6308 | mddev->bitmap_info.default_offset = 0; | |
6409bb05 | 6309 | mddev->bitmap_info.default_space = 0; |
6177b472 N |
6310 | mddev->bitmap_info.chunksize = 0; |
6311 | mddev->bitmap_info.daemon_sleep = 0; | |
6312 | mddev->bitmap_info.max_write_behind = 0; | |
c20c33f0 | 6313 | mddev->bitmap_info.nodes = 0; |
6177b472 N |
6314 | } |
6315 | ||
fd01b88c | 6316 | static void __md_stop_writes(struct mddev *mddev) |
a047e125 | 6317 | { |
f52f5c71 | 6318 | stop_sync_thread(mddev, true, false); |
a047e125 N |
6319 | del_timer_sync(&mddev->safemode_timer); |
6320 | ||
034e33f5 SL |
6321 | if (mddev->pers && mddev->pers->quiesce) { |
6322 | mddev->pers->quiesce(mddev, 1); | |
6323 | mddev->pers->quiesce(mddev, 0); | |
6324 | } | |
e64e4018 | 6325 | md_bitmap_flush(mddev); |
a047e125 | 6326 | |
f97a5528 | 6327 | if (md_is_rdwr(mddev) && |
28c1b9fd | 6328 | ((!mddev->in_sync && !mddev_is_clustered(mddev)) || |
2953079c | 6329 | mddev->sb_flags)) { |
a047e125 | 6330 | /* mark array as shutdown cleanly */ |
28c1b9fd GR |
6331 | if (!mddev_is_clustered(mddev)) |
6332 | mddev->in_sync = 1; | |
a047e125 N |
6333 | md_update_sb(mddev, 1); |
6334 | } | |
69b00b5b GJ |
6335 | /* disable policy to guarantee rdevs free resources for serialization */ |
6336 | mddev->serialize_policy = 0; | |
b4128c00 | 6337 | mddev_destroy_serial_pool(mddev, NULL); |
a047e125 | 6338 | } |
defad61a | 6339 | |
fd01b88c | 6340 | void md_stop_writes(struct mddev *mddev) |
defad61a | 6341 | { |
29f097c4 | 6342 | mddev_lock_nointr(mddev); |
defad61a N |
6343 | __md_stop_writes(mddev); |
6344 | mddev_unlock(mddev); | |
6345 | } | |
390ee602 | 6346 | EXPORT_SYMBOL_GPL(md_stop_writes); |
a047e125 | 6347 | |
5aa61f42 N |
6348 | static void mddev_detach(struct mddev *mddev) |
6349 | { | |
e64e4018 | 6350 | md_bitmap_wait_behind_writes(mddev); |
d1932913 | 6351 | if (mddev->pers && mddev->pers->quiesce && !is_md_suspended(mddev)) { |
5aa61f42 N |
6352 | mddev->pers->quiesce(mddev, 1); |
6353 | mddev->pers->quiesce(mddev, 0); | |
6354 | } | |
7eb8ff02 | 6355 | md_unregister_thread(mddev, &mddev->thread); |
5aa61f42 N |
6356 | if (mddev->queue) |
6357 | blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ | |
6358 | } | |
6359 | ||
5eff3c43 | 6360 | static void __md_stop(struct mddev *mddev) |
6177b472 | 6361 | { |
36d091f4 | 6362 | struct md_personality *pers = mddev->pers; |
1d258758 | 6363 | md_bitmap_destroy(mddev); |
5aa61f42 | 6364 | mddev_detach(mddev); |
36d091f4 | 6365 | spin_lock(&mddev->lock); |
6177b472 | 6366 | mddev->pers = NULL; |
36d091f4 | 6367 | spin_unlock(&mddev->lock); |
07641b5f | 6368 | if (mddev->private) |
6369 | pers->free(mddev, mddev->private); | |
bd691922 | 6370 | mddev->private = NULL; |
36d091f4 N |
6371 | if (pers->sync_request && mddev->to_remove == NULL) |
6372 | mddev->to_remove = &md_redundancy_group; | |
6373 | module_put(pers->owner); | |
cca9cf90 | 6374 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
3e453522 | 6375 | |
3e453522 XN |
6376 | bioset_exit(&mddev->bio_set); |
6377 | bioset_exit(&mddev->sync_set); | |
c687297b | 6378 | bioset_exit(&mddev->io_clone_set); |
6aaa58c9 JW |
6379 | } |
6380 | ||
6381 | void md_stop(struct mddev *mddev) | |
6382 | { | |
7d5fff89 YK |
6383 | lockdep_assert_held(&mddev->reconfig_mutex); |
6384 | ||
6aaa58c9 JW |
6385 | /* stop the array and free an attached data structures. |
6386 | * This is called from dm-raid | |
6387 | */ | |
0dd84b31 | 6388 | __md_stop_writes(mddev); |
6aaa58c9 | 6389 | __md_stop(mddev); |
5eff3c43 N |
6390 | } |
6391 | ||
390ee602 | 6392 | EXPORT_SYMBOL_GPL(md_stop); |
6177b472 | 6393 | |
a05b7ea0 | 6394 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) |
a4bd82d0 N |
6395 | { |
6396 | int err = 0; | |
30b8feb7 N |
6397 | int did_freeze = 0; |
6398 | ||
c9f7cb5b YK |
6399 | if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
6400 | return -EBUSY; | |
6401 | ||
30b8feb7 N |
6402 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { |
6403 | did_freeze = 1; | |
6404 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6405 | md_wakeup_thread(mddev->thread); | |
6406 | } | |
f851b60d | 6407 | |
f52f5c71 | 6408 | stop_sync_thread(mddev, false, false); |
88724bfa | 6409 | wait_event(mddev->sb_wait, |
2953079c | 6410 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
30b8feb7 N |
6411 | mddev_lock_nointr(mddev); |
6412 | ||
a4bd82d0 | 6413 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6414 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 | 6415 | mddev->sync_thread || |
af8d8e6f | 6416 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6417 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
a4bd82d0 N |
6418 | err = -EBUSY; |
6419 | goto out; | |
6420 | } | |
c9f7cb5b | 6421 | |
a4bd82d0 | 6422 | if (mddev->pers) { |
defad61a | 6423 | __md_stop_writes(mddev); |
a4bd82d0 | 6424 | |
c9f7cb5b YK |
6425 | if (mddev->ro == MD_RDONLY) { |
6426 | err = -ENXIO; | |
a4bd82d0 | 6427 | goto out; |
c9f7cb5b YK |
6428 | } |
6429 | ||
f97a5528 | 6430 | mddev->ro = MD_RDONLY; |
a4bd82d0 | 6431 | set_disk_ro(mddev->gendisk, 1); |
c9f7cb5b YK |
6432 | } |
6433 | ||
6434 | out: | |
6435 | if ((mddev->pers && !err) || did_freeze) { | |
a4bd82d0 | 6436 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
45eaf45d N |
6437 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
6438 | md_wakeup_thread(mddev->thread); | |
00bcb4ac | 6439 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
a4bd82d0 | 6440 | } |
c9f7cb5b | 6441 | |
a4bd82d0 N |
6442 | mutex_unlock(&mddev->open_mutex); |
6443 | return err; | |
6444 | } | |
6445 | ||
9e653b63 N |
6446 | /* mode: |
6447 | * 0 - completely stop and dis-assemble array | |
9e653b63 N |
6448 | * 2 - stop but do not disassemble array |
6449 | */ | |
f72ffdd6 | 6450 | static int do_md_stop(struct mddev *mddev, int mode, |
a05b7ea0 | 6451 | struct block_device *bdev) |
1da177e4 | 6452 | { |
1da177e4 | 6453 | struct gendisk *disk = mddev->gendisk; |
3cb03002 | 6454 | struct md_rdev *rdev; |
30b8feb7 N |
6455 | int did_freeze = 0; |
6456 | ||
6457 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6458 | did_freeze = 1; | |
6459 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6460 | md_wakeup_thread(mddev->thread); | |
6461 | } | |
f851b60d | 6462 | |
f52f5c71 | 6463 | stop_sync_thread(mddev, true, false); |
1da177e4 | 6464 | |
c8c00a69 | 6465 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6466 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 N |
6467 | mddev->sysfs_active || |
6468 | mddev->sync_thread || | |
af8d8e6f | 6469 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6470 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
6e17b027 | 6471 | mutex_unlock(&mddev->open_mutex); |
30b8feb7 N |
6472 | if (did_freeze) { |
6473 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6474 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6475 | md_wakeup_thread(mddev->thread); |
6476 | } | |
260fa034 N |
6477 | return -EBUSY; |
6478 | } | |
6e17b027 | 6479 | if (mddev->pers) { |
f97a5528 | 6480 | if (!md_is_rdwr(mddev)) |
a4bd82d0 | 6481 | set_disk_ro(disk, 0); |
409c57f3 | 6482 | |
defad61a | 6483 | __md_stop_writes(mddev); |
5eff3c43 | 6484 | __md_stop(mddev); |
6177b472 | 6485 | |
a4bd82d0 | 6486 | /* tell userspace to handle 'inactive' */ |
00bcb4ac | 6487 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0d4ca600 | 6488 | |
dafb20fa | 6489 | rdev_for_each(rdev, mddev) |
36fad858 NK |
6490 | if (rdev->raid_disk >= 0) |
6491 | sysfs_unlink_rdev(mddev, rdev); | |
c4647292 | 6492 | |
2c247c51 | 6493 | set_capacity_and_notify(disk, 0); |
6e17b027 | 6494 | mutex_unlock(&mddev->open_mutex); |
f0b4f7e2 | 6495 | mddev->changed = 1; |
0d4ca600 | 6496 | |
f97a5528 YB |
6497 | if (!md_is_rdwr(mddev)) |
6498 | mddev->ro = MD_RDWR; | |
6e17b027 N |
6499 | } else |
6500 | mutex_unlock(&mddev->open_mutex); | |
1da177e4 LT |
6501 | /* |
6502 | * Free resources if final stop | |
6503 | */ | |
9e653b63 | 6504 | if (mode == 0) { |
9d48739e | 6505 | pr_info("md: %s stopped.\n", mdname(mddev)); |
1da177e4 | 6506 | |
c3d9714e | 6507 | if (mddev->bitmap_info.file) { |
4af1a041 N |
6508 | struct file *f = mddev->bitmap_info.file; |
6509 | spin_lock(&mddev->lock); | |
c3d9714e | 6510 | mddev->bitmap_info.file = NULL; |
4af1a041 N |
6511 | spin_unlock(&mddev->lock); |
6512 | fput(f); | |
978f946b | 6513 | } |
c3d9714e | 6514 | mddev->bitmap_info.offset = 0; |
978f946b | 6515 | |
1da177e4 LT |
6516 | export_array(mddev); |
6517 | ||
6177b472 | 6518 | md_clean(mddev); |
efeb53c0 N |
6519 | if (mddev->hold_active == UNTIL_STOP) |
6520 | mddev->hold_active = 0; | |
a4bd82d0 | 6521 | } |
54679486 | 6522 | md_new_event(); |
00bcb4ac | 6523 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6e17b027 | 6524 | return 0; |
1da177e4 LT |
6525 | } |
6526 | ||
fdee8ae4 | 6527 | #ifndef MODULE |
fd01b88c | 6528 | static void autorun_array(struct mddev *mddev) |
1da177e4 | 6529 | { |
3cb03002 | 6530 | struct md_rdev *rdev; |
1da177e4 LT |
6531 | int err; |
6532 | ||
a757e64c | 6533 | if (list_empty(&mddev->disks)) |
1da177e4 | 6534 | return; |
1da177e4 | 6535 | |
9d48739e | 6536 | pr_info("md: running: "); |
1da177e4 | 6537 | |
dafb20fa | 6538 | rdev_for_each(rdev, mddev) { |
913cce5a | 6539 | pr_cont("<%pg>", rdev->bdev); |
1da177e4 | 6540 | } |
9d48739e | 6541 | pr_cont("\n"); |
1da177e4 | 6542 | |
d710e138 | 6543 | err = do_md_run(mddev); |
1da177e4 | 6544 | if (err) { |
9d48739e | 6545 | pr_warn("md: do_md_run() returned %d\n", err); |
a05b7ea0 | 6546 | do_md_stop(mddev, 0, NULL); |
1da177e4 LT |
6547 | } |
6548 | } | |
6549 | ||
6550 | /* | |
6551 | * lets try to run arrays based on all disks that have arrived | |
6552 | * until now. (those are in pending_raid_disks) | |
6553 | * | |
6554 | * the method: pick the first pending disk, collect all disks with | |
6555 | * the same UUID, remove all from the pending list and put them into | |
6556 | * the 'same_array' list. Then order this list based on superblock | |
6557 | * update time (freshest comes first), kick out 'old' disks and | |
6558 | * compare superblocks. If everything's fine then run it. | |
6559 | * | |
6560 | * If "unit" is allocated, then bump its reference count | |
6561 | */ | |
6562 | static void autorun_devices(int part) | |
6563 | { | |
3cb03002 | 6564 | struct md_rdev *rdev0, *rdev, *tmp; |
fd01b88c | 6565 | struct mddev *mddev; |
1da177e4 | 6566 | |
9d48739e | 6567 | pr_info("md: autorun ...\n"); |
1da177e4 | 6568 | while (!list_empty(&pending_raid_disks)) { |
e8703fe1 | 6569 | int unit; |
1da177e4 | 6570 | dev_t dev; |
ad01c9e3 | 6571 | LIST_HEAD(candidates); |
1da177e4 | 6572 | rdev0 = list_entry(pending_raid_disks.next, |
3cb03002 | 6573 | struct md_rdev, same_set); |
1da177e4 | 6574 | |
913cce5a | 6575 | pr_debug("md: considering %pg ...\n", rdev0->bdev); |
1da177e4 | 6576 | INIT_LIST_HEAD(&candidates); |
159ec1fc | 6577 | rdev_for_each_list(rdev, tmp, &pending_raid_disks) |
1da177e4 | 6578 | if (super_90_load(rdev, rdev0, 0) >= 0) { |
913cce5a CH |
6579 | pr_debug("md: adding %pg ...\n", |
6580 | rdev->bdev); | |
1da177e4 LT |
6581 | list_move(&rdev->same_set, &candidates); |
6582 | } | |
6583 | /* | |
6584 | * now we have a set of devices, with all of them having | |
6585 | * mostly sane superblocks. It's time to allocate the | |
6586 | * mddev. | |
6587 | */ | |
e8703fe1 N |
6588 | if (part) { |
6589 | dev = MKDEV(mdp_major, | |
6590 | rdev0->preferred_minor << MdpMinorShift); | |
6591 | unit = MINOR(dev) >> MdpMinorShift; | |
6592 | } else { | |
6593 | dev = MKDEV(MD_MAJOR, rdev0->preferred_minor); | |
6594 | unit = MINOR(dev); | |
6595 | } | |
6596 | if (rdev0->preferred_minor != unit) { | |
913cce5a CH |
6597 | pr_warn("md: unit number in %pg is bad: %d\n", |
6598 | rdev0->bdev, rdev0->preferred_minor); | |
1da177e4 LT |
6599 | break; |
6600 | } | |
1da177e4 | 6601 | |
34cb92c0 CH |
6602 | mddev = md_alloc(dev, NULL); |
6603 | if (IS_ERR(mddev)) | |
1da177e4 | 6604 | break; |
65aa97c4 | 6605 | |
58226942 | 6606 | if (mddev_suspend_and_lock(mddev)) |
9d48739e | 6607 | pr_warn("md: %s locked, cannot run\n", mdname(mddev)); |
1da177e4 LT |
6608 | else if (mddev->raid_disks || mddev->major_version |
6609 | || !list_empty(&mddev->disks)) { | |
913cce5a CH |
6610 | pr_warn("md: %s already running, cannot run %pg\n", |
6611 | mdname(mddev), rdev0->bdev); | |
58226942 | 6612 | mddev_unlock_and_resume(mddev); |
1da177e4 | 6613 | } else { |
9d48739e | 6614 | pr_debug("md: created %s\n", mdname(mddev)); |
1ec4a939 | 6615 | mddev->persistent = 1; |
159ec1fc | 6616 | rdev_for_each_list(rdev, tmp, &candidates) { |
1da177e4 LT |
6617 | list_del_init(&rdev->same_set); |
6618 | if (bind_rdev_to_array(rdev, mddev)) | |
2736e8ee | 6619 | export_rdev(rdev, mddev); |
1da177e4 LT |
6620 | } |
6621 | autorun_array(mddev); | |
58226942 | 6622 | mddev_unlock_and_resume(mddev); |
1da177e4 LT |
6623 | } |
6624 | /* on success, candidates will be empty, on error | |
6625 | * it won't... | |
6626 | */ | |
159ec1fc | 6627 | rdev_for_each_list(rdev, tmp, &candidates) { |
4b80991c | 6628 | list_del_init(&rdev->same_set); |
2736e8ee | 6629 | export_rdev(rdev, mddev); |
4b80991c | 6630 | } |
1da177e4 LT |
6631 | mddev_put(mddev); |
6632 | } | |
9d48739e | 6633 | pr_info("md: ... autorun DONE.\n"); |
1da177e4 | 6634 | } |
fdee8ae4 | 6635 | #endif /* !MODULE */ |
1da177e4 | 6636 | |
f72ffdd6 | 6637 | static int get_version(void __user *arg) |
1da177e4 LT |
6638 | { |
6639 | mdu_version_t ver; | |
6640 | ||
6641 | ver.major = MD_MAJOR_VERSION; | |
6642 | ver.minor = MD_MINOR_VERSION; | |
6643 | ver.patchlevel = MD_PATCHLEVEL_VERSION; | |
6644 | ||
6645 | if (copy_to_user(arg, &ver, sizeof(ver))) | |
6646 | return -EFAULT; | |
6647 | ||
6648 | return 0; | |
6649 | } | |
6650 | ||
f72ffdd6 | 6651 | static int get_array_info(struct mddev *mddev, void __user *arg) |
1da177e4 LT |
6652 | { |
6653 | mdu_array_info_t info; | |
a9f326eb | 6654 | int nr,working,insync,failed,spare; |
3cb03002 | 6655 | struct md_rdev *rdev; |
1da177e4 | 6656 | |
1ca69c4b N |
6657 | nr = working = insync = failed = spare = 0; |
6658 | rcu_read_lock(); | |
6659 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 6660 | nr++; |
b2d444d7 | 6661 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
6662 | failed++; |
6663 | else { | |
6664 | working++; | |
b2d444d7 | 6665 | if (test_bit(In_sync, &rdev->flags)) |
f72ffdd6 | 6666 | insync++; |
b347af81 SL |
6667 | else if (test_bit(Journal, &rdev->flags)) |
6668 | /* TODO: add journal count to md_u.h */ | |
6669 | ; | |
1da177e4 LT |
6670 | else |
6671 | spare++; | |
6672 | } | |
6673 | } | |
1ca69c4b | 6674 | rcu_read_unlock(); |
1da177e4 LT |
6675 | |
6676 | info.major_version = mddev->major_version; | |
6677 | info.minor_version = mddev->minor_version; | |
6678 | info.patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6679 | info.ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 6680 | info.level = mddev->level; |
58c0fed4 AN |
6681 | info.size = mddev->dev_sectors / 2; |
6682 | if (info.size != mddev->dev_sectors / 2) /* overflow */ | |
284ae7ca | 6683 | info.size = -1; |
1da177e4 LT |
6684 | info.nr_disks = nr; |
6685 | info.raid_disks = mddev->raid_disks; | |
6686 | info.md_minor = mddev->md_minor; | |
6687 | info.not_persistent= !mddev->persistent; | |
6688 | ||
9ebc6ef1 | 6689 | info.utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
6690 | info.state = 0; |
6691 | if (mddev->in_sync) | |
6692 | info.state = (1<<MD_SB_CLEAN); | |
c3d9714e | 6693 | if (mddev->bitmap && mddev->bitmap_info.offset) |
9bd35920 | 6694 | info.state |= (1<<MD_SB_BITMAP_PRESENT); |
ca8895d9 GR |
6695 | if (mddev_is_clustered(mddev)) |
6696 | info.state |= (1<<MD_SB_CLUSTERED); | |
a9f326eb | 6697 | info.active_disks = insync; |
1da177e4 LT |
6698 | info.working_disks = working; |
6699 | info.failed_disks = failed; | |
6700 | info.spare_disks = spare; | |
6701 | ||
6702 | info.layout = mddev->layout; | |
9d8f0363 | 6703 | info.chunk_size = mddev->chunk_sectors << 9; |
1da177e4 LT |
6704 | |
6705 | if (copy_to_user(arg, &info, sizeof(info))) | |
6706 | return -EFAULT; | |
6707 | ||
6708 | return 0; | |
6709 | } | |
6710 | ||
f72ffdd6 | 6711 | static int get_bitmap_file(struct mddev *mddev, void __user * arg) |
32a7627c N |
6712 | { |
6713 | mdu_bitmap_file_t *file = NULL; /* too big for stack allocation */ | |
f4ad3d38 | 6714 | char *ptr; |
4af1a041 | 6715 | int err; |
32a7627c | 6716 | |
b6878d9e | 6717 | file = kzalloc(sizeof(*file), GFP_NOIO); |
32a7627c | 6718 | if (!file) |
4af1a041 | 6719 | return -ENOMEM; |
32a7627c | 6720 | |
4af1a041 N |
6721 | err = 0; |
6722 | spin_lock(&mddev->lock); | |
25eafe1a BR |
6723 | /* bitmap enabled */ |
6724 | if (mddev->bitmap_info.file) { | |
6725 | ptr = file_path(mddev->bitmap_info.file, file->pathname, | |
6726 | sizeof(file->pathname)); | |
6727 | if (IS_ERR(ptr)) | |
6728 | err = PTR_ERR(ptr); | |
6729 | else | |
6730 | memmove(file->pathname, ptr, | |
6731 | sizeof(file->pathname)-(ptr-file->pathname)); | |
6732 | } | |
4af1a041 | 6733 | spin_unlock(&mddev->lock); |
32a7627c | 6734 | |
4af1a041 N |
6735 | if (err == 0 && |
6736 | copy_to_user(arg, file, sizeof(*file))) | |
32a7627c | 6737 | err = -EFAULT; |
4af1a041 | 6738 | |
32a7627c N |
6739 | kfree(file); |
6740 | return err; | |
6741 | } | |
6742 | ||
f72ffdd6 | 6743 | static int get_disk_info(struct mddev *mddev, void __user * arg) |
1da177e4 LT |
6744 | { |
6745 | mdu_disk_info_t info; | |
3cb03002 | 6746 | struct md_rdev *rdev; |
1da177e4 LT |
6747 | |
6748 | if (copy_from_user(&info, arg, sizeof(info))) | |
6749 | return -EFAULT; | |
6750 | ||
1ca69c4b | 6751 | rcu_read_lock(); |
57d051dc | 6752 | rdev = md_find_rdev_nr_rcu(mddev, info.number); |
1da177e4 LT |
6753 | if (rdev) { |
6754 | info.major = MAJOR(rdev->bdev->bd_dev); | |
6755 | info.minor = MINOR(rdev->bdev->bd_dev); | |
6756 | info.raid_disk = rdev->raid_disk; | |
6757 | info.state = 0; | |
b2d444d7 | 6758 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 6759 | info.state |= (1<<MD_DISK_FAULTY); |
b2d444d7 | 6760 | else if (test_bit(In_sync, &rdev->flags)) { |
1da177e4 LT |
6761 | info.state |= (1<<MD_DISK_ACTIVE); |
6762 | info.state |= (1<<MD_DISK_SYNC); | |
6763 | } | |
9efdca16 | 6764 | if (test_bit(Journal, &rdev->flags)) |
bac624f3 | 6765 | info.state |= (1<<MD_DISK_JOURNAL); |
8ddf9efe N |
6766 | if (test_bit(WriteMostly, &rdev->flags)) |
6767 | info.state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
6768 | if (test_bit(FailFast, &rdev->flags)) |
6769 | info.state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 LT |
6770 | } else { |
6771 | info.major = info.minor = 0; | |
6772 | info.raid_disk = -1; | |
6773 | info.state = (1<<MD_DISK_REMOVED); | |
6774 | } | |
1ca69c4b | 6775 | rcu_read_unlock(); |
1da177e4 LT |
6776 | |
6777 | if (copy_to_user(arg, &info, sizeof(info))) | |
6778 | return -EFAULT; | |
6779 | ||
6780 | return 0; | |
6781 | } | |
6782 | ||
7e0adbfc | 6783 | int md_add_new_disk(struct mddev *mddev, struct mdu_disk_info_s *info) |
1da177e4 | 6784 | { |
3cb03002 | 6785 | struct md_rdev *rdev; |
1da177e4 LT |
6786 | dev_t dev = MKDEV(info->major,info->minor); |
6787 | ||
1aee41f6 GR |
6788 | if (mddev_is_clustered(mddev) && |
6789 | !(info->state & ((1 << MD_DISK_CLUSTER_ADD) | (1 << MD_DISK_CANDIDATE)))) { | |
9d48739e N |
6790 | pr_warn("%s: Cannot add to clustered mddev.\n", |
6791 | mdname(mddev)); | |
1aee41f6 GR |
6792 | return -EINVAL; |
6793 | } | |
6794 | ||
1da177e4 LT |
6795 | if (info->major != MAJOR(dev) || info->minor != MINOR(dev)) |
6796 | return -EOVERFLOW; | |
6797 | ||
6798 | if (!mddev->raid_disks) { | |
6799 | int err; | |
6800 | /* expecting a device which has a superblock */ | |
6801 | rdev = md_import_device(dev, mddev->major_version, mddev->minor_version); | |
6802 | if (IS_ERR(rdev)) { | |
9d48739e | 6803 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6804 | PTR_ERR(rdev)); |
6805 | return PTR_ERR(rdev); | |
6806 | } | |
6807 | if (!list_empty(&mddev->disks)) { | |
3cb03002 N |
6808 | struct md_rdev *rdev0 |
6809 | = list_entry(mddev->disks.next, | |
6810 | struct md_rdev, same_set); | |
a9f326eb | 6811 | err = super_types[mddev->major_version] |
1da177e4 LT |
6812 | .load_super(rdev, rdev0, mddev->minor_version); |
6813 | if (err < 0) { | |
913cce5a CH |
6814 | pr_warn("md: %pg has different UUID to %pg\n", |
6815 | rdev->bdev, | |
6816 | rdev0->bdev); | |
2736e8ee | 6817 | export_rdev(rdev, mddev); |
1da177e4 LT |
6818 | return -EINVAL; |
6819 | } | |
6820 | } | |
6821 | err = bind_rdev_to_array(rdev, mddev); | |
6822 | if (err) | |
2736e8ee | 6823 | export_rdev(rdev, mddev); |
1da177e4 LT |
6824 | return err; |
6825 | } | |
6826 | ||
6827 | /* | |
7e0adbfc | 6828 | * md_add_new_disk can be used once the array is assembled |
1da177e4 LT |
6829 | * to add "hot spares". They must already have a superblock |
6830 | * written | |
6831 | */ | |
6832 | if (mddev->pers) { | |
6833 | int err; | |
6834 | if (!mddev->pers->hot_add_disk) { | |
9d48739e N |
6835 | pr_warn("%s: personality does not support diskops!\n", |
6836 | mdname(mddev)); | |
1da177e4 LT |
6837 | return -EINVAL; |
6838 | } | |
7b1e35f6 N |
6839 | if (mddev->persistent) |
6840 | rdev = md_import_device(dev, mddev->major_version, | |
6841 | mddev->minor_version); | |
6842 | else | |
6843 | rdev = md_import_device(dev, -1, -1); | |
1da177e4 | 6844 | if (IS_ERR(rdev)) { |
9d48739e | 6845 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6846 | PTR_ERR(rdev)); |
6847 | return PTR_ERR(rdev); | |
6848 | } | |
1a855a06 | 6849 | /* set saved_raid_disk if appropriate */ |
41158c7e N |
6850 | if (!mddev->persistent) { |
6851 | if (info->state & (1<<MD_DISK_SYNC) && | |
bf572541 | 6852 | info->raid_disk < mddev->raid_disks) { |
41158c7e | 6853 | rdev->raid_disk = info->raid_disk; |
8313b8e5 | 6854 | clear_bit(Bitmap_sync, &rdev->flags); |
bf572541 | 6855 | } else |
41158c7e | 6856 | rdev->raid_disk = -1; |
f466722c | 6857 | rdev->saved_raid_disk = rdev->raid_disk; |
41158c7e N |
6858 | } else |
6859 | super_types[mddev->major_version]. | |
dc1cc22e | 6860 | validate_super(mddev, NULL/*freshest*/, rdev); |
bedd86b7 | 6861 | if ((info->state & (1<<MD_DISK_SYNC)) && |
f4563091 | 6862 | rdev->raid_disk != info->raid_disk) { |
bedd86b7 N |
6863 | /* This was a hot-add request, but events doesn't |
6864 | * match, so reject it. | |
6865 | */ | |
2736e8ee | 6866 | export_rdev(rdev, mddev); |
bedd86b7 N |
6867 | return -EINVAL; |
6868 | } | |
6869 | ||
b2d444d7 | 6870 | clear_bit(In_sync, &rdev->flags); /* just to be sure */ |
8ddf9efe N |
6871 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6872 | set_bit(WriteMostly, &rdev->flags); | |
575a80fa N |
6873 | else |
6874 | clear_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6875 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6876 | set_bit(FailFast, &rdev->flags); | |
6877 | else | |
6878 | clear_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6879 | |
f6b6ec5c SL |
6880 | if (info->state & (1<<MD_DISK_JOURNAL)) { |
6881 | struct md_rdev *rdev2; | |
6882 | bool has_journal = false; | |
6883 | ||
6884 | /* make sure no existing journal disk */ | |
6885 | rdev_for_each(rdev2, mddev) { | |
6886 | if (test_bit(Journal, &rdev2->flags)) { | |
6887 | has_journal = true; | |
6888 | break; | |
6889 | } | |
6890 | } | |
230b55fa | 6891 | if (has_journal || mddev->bitmap) { |
2736e8ee | 6892 | export_rdev(rdev, mddev); |
f6b6ec5c SL |
6893 | return -EBUSY; |
6894 | } | |
bac624f3 | 6895 | set_bit(Journal, &rdev->flags); |
f6b6ec5c | 6896 | } |
1aee41f6 GR |
6897 | /* |
6898 | * check whether the device shows up in other nodes | |
6899 | */ | |
6900 | if (mddev_is_clustered(mddev)) { | |
dbb64f86 | 6901 | if (info->state & (1 << MD_DISK_CANDIDATE)) |
1aee41f6 | 6902 | set_bit(Candidate, &rdev->flags); |
dbb64f86 | 6903 | else if (info->state & (1 << MD_DISK_CLUSTER_ADD)) { |
1aee41f6 | 6904 | /* --add initiated by this node */ |
dbb64f86 | 6905 | err = md_cluster_ops->add_new_disk(mddev, rdev); |
1aee41f6 | 6906 | if (err) { |
2736e8ee | 6907 | export_rdev(rdev, mddev); |
1aee41f6 GR |
6908 | return err; |
6909 | } | |
6910 | } | |
6911 | } | |
6912 | ||
1da177e4 LT |
6913 | rdev->raid_disk = -1; |
6914 | err = bind_rdev_to_array(rdev, mddev); | |
dbb64f86 | 6915 | |
1da177e4 | 6916 | if (err) |
2736e8ee | 6917 | export_rdev(rdev, mddev); |
dbb64f86 GR |
6918 | |
6919 | if (mddev_is_clustered(mddev)) { | |
e566aef1 GJ |
6920 | if (info->state & (1 << MD_DISK_CANDIDATE)) { |
6921 | if (!err) { | |
6922 | err = md_cluster_ops->new_disk_ack(mddev, | |
6923 | err == 0); | |
6924 | if (err) | |
6925 | md_kick_rdev_from_array(rdev); | |
6926 | } | |
6927 | } else { | |
dbb64f86 GR |
6928 | if (err) |
6929 | md_cluster_ops->add_new_disk_cancel(mddev); | |
6930 | else | |
6931 | err = add_bound_rdev(rdev); | |
6932 | } | |
6933 | ||
6934 | } else if (!err) | |
a6da4ef8 | 6935 | err = add_bound_rdev(rdev); |
dbb64f86 | 6936 | |
1da177e4 LT |
6937 | return err; |
6938 | } | |
6939 | ||
7e0adbfc | 6940 | /* otherwise, md_add_new_disk is only allowed |
1da177e4 LT |
6941 | * for major_version==0 superblocks |
6942 | */ | |
6943 | if (mddev->major_version != 0) { | |
9d48739e | 6944 | pr_warn("%s: ADD_NEW_DISK not supported\n", mdname(mddev)); |
1da177e4 LT |
6945 | return -EINVAL; |
6946 | } | |
6947 | ||
6948 | if (!(info->state & (1<<MD_DISK_FAULTY))) { | |
6949 | int err; | |
d710e138 | 6950 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6951 | if (IS_ERR(rdev)) { |
9d48739e | 6952 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6953 | PTR_ERR(rdev)); |
6954 | return PTR_ERR(rdev); | |
6955 | } | |
6956 | rdev->desc_nr = info->number; | |
6957 | if (info->raid_disk < mddev->raid_disks) | |
6958 | rdev->raid_disk = info->raid_disk; | |
6959 | else | |
6960 | rdev->raid_disk = -1; | |
6961 | ||
1da177e4 | 6962 | if (rdev->raid_disk < mddev->raid_disks) |
b2d444d7 N |
6963 | if (info->state & (1<<MD_DISK_SYNC)) |
6964 | set_bit(In_sync, &rdev->flags); | |
1da177e4 | 6965 | |
8ddf9efe N |
6966 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6967 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6968 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6969 | set_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6970 | |
1da177e4 | 6971 | if (!mddev->persistent) { |
9d48739e | 6972 | pr_debug("md: nonpersistent superblock ...\n"); |
0fe80347 | 6973 | rdev->sb_start = bdev_nr_sectors(rdev->bdev); |
77304d2a | 6974 | } else |
57b2caa3 | 6975 | rdev->sb_start = calc_dev_sboffset(rdev); |
8190e754 | 6976 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6977 | |
2bf071bf N |
6978 | err = bind_rdev_to_array(rdev, mddev); |
6979 | if (err) { | |
2736e8ee | 6980 | export_rdev(rdev, mddev); |
2bf071bf N |
6981 | return err; |
6982 | } | |
1da177e4 LT |
6983 | } |
6984 | ||
6985 | return 0; | |
6986 | } | |
6987 | ||
f72ffdd6 | 6988 | static int hot_remove_disk(struct mddev *mddev, dev_t dev) |
1da177e4 | 6989 | { |
3cb03002 | 6990 | struct md_rdev *rdev; |
1da177e4 | 6991 | |
c42a0e26 YY |
6992 | if (!mddev->pers) |
6993 | return -ENODEV; | |
6994 | ||
1da177e4 LT |
6995 | rdev = find_rdev(mddev, dev); |
6996 | if (!rdev) | |
6997 | return -ENXIO; | |
6998 | ||
2910ff17 GR |
6999 | if (rdev->raid_disk < 0) |
7000 | goto kick_rdev; | |
293467aa | 7001 | |
3ea8929d N |
7002 | clear_bit(Blocked, &rdev->flags); |
7003 | remove_and_add_spares(mddev, rdev); | |
7004 | ||
1da177e4 LT |
7005 | if (rdev->raid_disk >= 0) |
7006 | goto busy; | |
7007 | ||
2910ff17 | 7008 | kick_rdev: |
bca5b065 ZH |
7009 | if (mddev_is_clustered(mddev)) { |
7010 | if (md_cluster_ops->remove_disk(mddev, rdev)) | |
7011 | goto busy; | |
7012 | } | |
88bcfef7 | 7013 | |
fb56dfef | 7014 | md_kick_rdev_from_array(rdev); |
2953079c | 7015 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
7016 | if (mddev->thread) |
7017 | md_wakeup_thread(mddev->thread); | |
7018 | else | |
7019 | md_update_sb(mddev, 1); | |
54679486 | 7020 | md_new_event(); |
1da177e4 LT |
7021 | |
7022 | return 0; | |
7023 | busy: | |
913cce5a CH |
7024 | pr_debug("md: cannot remove active disk %pg from %s ...\n", |
7025 | rdev->bdev, mdname(mddev)); | |
1da177e4 LT |
7026 | return -EBUSY; |
7027 | } | |
7028 | ||
f72ffdd6 | 7029 | static int hot_add_disk(struct mddev *mddev, dev_t dev) |
1da177e4 | 7030 | { |
1da177e4 | 7031 | int err; |
3cb03002 | 7032 | struct md_rdev *rdev; |
1da177e4 LT |
7033 | |
7034 | if (!mddev->pers) | |
7035 | return -ENODEV; | |
7036 | ||
7037 | if (mddev->major_version != 0) { | |
9d48739e | 7038 | pr_warn("%s: HOT_ADD may only be used with version-0 superblocks.\n", |
1da177e4 LT |
7039 | mdname(mddev)); |
7040 | return -EINVAL; | |
7041 | } | |
7042 | if (!mddev->pers->hot_add_disk) { | |
9d48739e | 7043 | pr_warn("%s: personality does not support diskops!\n", |
1da177e4 LT |
7044 | mdname(mddev)); |
7045 | return -EINVAL; | |
7046 | } | |
7047 | ||
d710e138 | 7048 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 7049 | if (IS_ERR(rdev)) { |
9d48739e | 7050 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
7051 | PTR_ERR(rdev)); |
7052 | return -EINVAL; | |
7053 | } | |
7054 | ||
7055 | if (mddev->persistent) | |
57b2caa3 | 7056 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 7057 | else |
0fe80347 | 7058 | rdev->sb_start = bdev_nr_sectors(rdev->bdev); |
1da177e4 | 7059 | |
8190e754 | 7060 | rdev->sectors = rdev->sb_start; |
1da177e4 | 7061 | |
b2d444d7 | 7062 | if (test_bit(Faulty, &rdev->flags)) { |
913cce5a CH |
7063 | pr_warn("md: can not hot-add faulty %pg disk to %s!\n", |
7064 | rdev->bdev, mdname(mddev)); | |
1da177e4 LT |
7065 | err = -EINVAL; |
7066 | goto abort_export; | |
7067 | } | |
293467aa | 7068 | |
b2d444d7 | 7069 | clear_bit(In_sync, &rdev->flags); |
1da177e4 | 7070 | rdev->desc_nr = -1; |
5842730d | 7071 | rdev->saved_raid_disk = -1; |
2bf071bf N |
7072 | err = bind_rdev_to_array(rdev, mddev); |
7073 | if (err) | |
2aa82191 | 7074 | goto abort_export; |
1da177e4 LT |
7075 | |
7076 | /* | |
7077 | * The rest should better be atomic, we can have disk failures | |
7078 | * noticed in interrupt contexts ... | |
7079 | */ | |
7080 | ||
1da177e4 LT |
7081 | rdev->raid_disk = -1; |
7082 | ||
2953079c | 7083 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
7084 | if (!mddev->thread) |
7085 | md_update_sb(mddev, 1); | |
f51d46d0 VV |
7086 | /* |
7087 | * If the new disk does not support REQ_NOWAIT, | |
7088 | * disable on the whole MD. | |
7089 | */ | |
568ec936 | 7090 | if (!bdev_nowait(rdev->bdev)) { |
913cce5a CH |
7091 | pr_info("%s: Disabling nowait because %pg does not support nowait\n", |
7092 | mdname(mddev), rdev->bdev); | |
f51d46d0 VV |
7093 | blk_queue_flag_clear(QUEUE_FLAG_NOWAIT, mddev->queue); |
7094 | } | |
1da177e4 LT |
7095 | /* |
7096 | * Kick recovery, maybe this spare has to be added to the | |
7097 | * array immediately. | |
7098 | */ | |
7099 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7100 | md_wakeup_thread(mddev->thread); | |
54679486 | 7101 | md_new_event(); |
1da177e4 LT |
7102 | return 0; |
7103 | ||
1da177e4 | 7104 | abort_export: |
2736e8ee | 7105 | export_rdev(rdev, mddev); |
1da177e4 LT |
7106 | return err; |
7107 | } | |
7108 | ||
fd01b88c | 7109 | static int set_bitmap_file(struct mddev *mddev, int fd) |
32a7627c | 7110 | { |
035328c2 | 7111 | int err = 0; |
32a7627c | 7112 | |
36fa3063 | 7113 | if (mddev->pers) { |
d66b1b39 | 7114 | if (!mddev->pers->quiesce || !mddev->thread) |
36fa3063 N |
7115 | return -EBUSY; |
7116 | if (mddev->recovery || mddev->sync_thread) | |
7117 | return -EBUSY; | |
7118 | /* we should be able to change the bitmap.. */ | |
7119 | } | |
32a7627c | 7120 | |
36fa3063 | 7121 | if (fd >= 0) { |
035328c2 | 7122 | struct inode *inode; |
1e594bb2 N |
7123 | struct file *f; |
7124 | ||
7125 | if (mddev->bitmap || mddev->bitmap_info.file) | |
36fa3063 | 7126 | return -EEXIST; /* cannot add when bitmap is present */ |
a34d4ef8 CH |
7127 | |
7128 | if (!IS_ENABLED(CONFIG_MD_BITMAP_FILE)) { | |
7129 | pr_warn("%s: bitmap files not supported by this kernel\n", | |
7130 | mdname(mddev)); | |
7131 | return -EINVAL; | |
7132 | } | |
0ae1c9d3 CH |
7133 | pr_warn("%s: using deprecated bitmap file support\n", |
7134 | mdname(mddev)); | |
a34d4ef8 | 7135 | |
1e594bb2 | 7136 | f = fget(fd); |
32a7627c | 7137 | |
1e594bb2 | 7138 | if (f == NULL) { |
9d48739e N |
7139 | pr_warn("%s: error: failed to get bitmap file\n", |
7140 | mdname(mddev)); | |
36fa3063 N |
7141 | return -EBADF; |
7142 | } | |
7143 | ||
1e594bb2 | 7144 | inode = f->f_mapping->host; |
035328c2 | 7145 | if (!S_ISREG(inode->i_mode)) { |
9d48739e N |
7146 | pr_warn("%s: error: bitmap file must be a regular file\n", |
7147 | mdname(mddev)); | |
035328c2 | 7148 | err = -EBADF; |
1e594bb2 | 7149 | } else if (!(f->f_mode & FMODE_WRITE)) { |
9d48739e N |
7150 | pr_warn("%s: error: bitmap file must open for write\n", |
7151 | mdname(mddev)); | |
035328c2 N |
7152 | err = -EBADF; |
7153 | } else if (atomic_read(&inode->i_writecount) != 1) { | |
9d48739e N |
7154 | pr_warn("%s: error: bitmap file is already in use\n", |
7155 | mdname(mddev)); | |
035328c2 N |
7156 | err = -EBUSY; |
7157 | } | |
7158 | if (err) { | |
1e594bb2 | 7159 | fput(f); |
36fa3063 N |
7160 | return err; |
7161 | } | |
1e594bb2 | 7162 | mddev->bitmap_info.file = f; |
c3d9714e | 7163 | mddev->bitmap_info.offset = 0; /* file overrides offset */ |
36fa3063 N |
7164 | } else if (mddev->bitmap == NULL) |
7165 | return -ENOENT; /* cannot remove what isn't there */ | |
7166 | err = 0; | |
7167 | if (mddev->pers) { | |
69e51b44 | 7168 | if (fd >= 0) { |
f9209a32 GR |
7169 | struct bitmap *bitmap; |
7170 | ||
e64e4018 | 7171 | bitmap = md_bitmap_create(mddev, -1); |
f9209a32 GR |
7172 | if (!IS_ERR(bitmap)) { |
7173 | mddev->bitmap = bitmap; | |
e64e4018 | 7174 | err = md_bitmap_load(mddev); |
ba599aca N |
7175 | } else |
7176 | err = PTR_ERR(bitmap); | |
52a0d49d | 7177 | if (err) { |
e64e4018 | 7178 | md_bitmap_destroy(mddev); |
52a0d49d N |
7179 | fd = -1; |
7180 | } | |
52a0d49d | 7181 | } else if (fd < 0) { |
e64e4018 | 7182 | md_bitmap_destroy(mddev); |
d7375ab3 | 7183 | } |
d7375ab3 N |
7184 | } |
7185 | if (fd < 0) { | |
4af1a041 N |
7186 | struct file *f = mddev->bitmap_info.file; |
7187 | if (f) { | |
7188 | spin_lock(&mddev->lock); | |
7189 | mddev->bitmap_info.file = NULL; | |
7190 | spin_unlock(&mddev->lock); | |
7191 | fput(f); | |
7192 | } | |
36fa3063 N |
7193 | } |
7194 | ||
32a7627c N |
7195 | return err; |
7196 | } | |
7197 | ||
1da177e4 | 7198 | /* |
7e0adbfc | 7199 | * md_set_array_info is used two different ways |
1da177e4 LT |
7200 | * The original usage is when creating a new array. |
7201 | * In this usage, raid_disks is > 0 and it together with | |
7202 | * level, size, not_persistent,layout,chunksize determine the | |
7203 | * shape of the array. | |
7204 | * This will always create an array with a type-0.90.0 superblock. | |
7205 | * The newer usage is when assembling an array. | |
7206 | * In this case raid_disks will be 0, and the major_version field is | |
7207 | * use to determine which style super-blocks are to be found on the devices. | |
7208 | * The minor and patch _version numbers are also kept incase the | |
7209 | * super_block handler wishes to interpret them. | |
7210 | */ | |
7e0adbfc | 7211 | int md_set_array_info(struct mddev *mddev, struct mdu_array_info_s *info) |
1da177e4 | 7212 | { |
1da177e4 LT |
7213 | if (info->raid_disks == 0) { |
7214 | /* just setting version number for superblock loading */ | |
7215 | if (info->major_version < 0 || | |
50511da3 | 7216 | info->major_version >= ARRAY_SIZE(super_types) || |
1da177e4 LT |
7217 | super_types[info->major_version].name == NULL) { |
7218 | /* maybe try to auto-load a module? */ | |
9d48739e | 7219 | pr_warn("md: superblock version %d not known\n", |
1da177e4 LT |
7220 | info->major_version); |
7221 | return -EINVAL; | |
7222 | } | |
7223 | mddev->major_version = info->major_version; | |
7224 | mddev->minor_version = info->minor_version; | |
7225 | mddev->patch_version = info->patch_version; | |
3f9d7b0d | 7226 | mddev->persistent = !info->not_persistent; |
cbd19983 N |
7227 | /* ensure mddev_put doesn't delete this now that there |
7228 | * is some minimal configuration. | |
7229 | */ | |
9ebc6ef1 | 7230 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
7231 | return 0; |
7232 | } | |
7233 | mddev->major_version = MD_MAJOR_VERSION; | |
7234 | mddev->minor_version = MD_MINOR_VERSION; | |
7235 | mddev->patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 7236 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
7237 | |
7238 | mddev->level = info->level; | |
17115e03 | 7239 | mddev->clevel[0] = 0; |
58c0fed4 | 7240 | mddev->dev_sectors = 2 * (sector_t)info->size; |
1da177e4 LT |
7241 | mddev->raid_disks = info->raid_disks; |
7242 | /* don't set md_minor, it is determined by which /dev/md* was | |
7243 | * openned | |
7244 | */ | |
7245 | if (info->state & (1<<MD_SB_CLEAN)) | |
7246 | mddev->recovery_cp = MaxSector; | |
7247 | else | |
7248 | mddev->recovery_cp = 0; | |
7249 | mddev->persistent = ! info->not_persistent; | |
e691063a | 7250 | mddev->external = 0; |
1da177e4 LT |
7251 | |
7252 | mddev->layout = info->layout; | |
33f2c35a N |
7253 | if (mddev->level == 0) |
7254 | /* Cannot trust RAID0 layout info here */ | |
7255 | mddev->layout = -1; | |
9d8f0363 | 7256 | mddev->chunk_sectors = info->chunk_size >> 9; |
1da177e4 | 7257 | |
2953079c | 7258 | if (mddev->persistent) { |
1b3bae49 N |
7259 | mddev->max_disks = MD_SB_DISKS; |
7260 | mddev->flags = 0; | |
7261 | mddev->sb_flags = 0; | |
2953079c SL |
7262 | } |
7263 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
1da177e4 | 7264 | |
c3d9714e | 7265 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 7266 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
c3d9714e | 7267 | mddev->bitmap_info.offset = 0; |
b2a2703c | 7268 | |
f6705578 N |
7269 | mddev->reshape_position = MaxSector; |
7270 | ||
1da177e4 LT |
7271 | /* |
7272 | * Generate a 128 bit UUID | |
7273 | */ | |
7274 | get_random_bytes(mddev->uuid, 16); | |
7275 | ||
f6705578 | 7276 | mddev->new_level = mddev->level; |
664e7c41 | 7277 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
7278 | mddev->new_layout = mddev->layout; |
7279 | mddev->delta_disks = 0; | |
2c810cdd | 7280 | mddev->reshape_backwards = 0; |
f6705578 | 7281 | |
1da177e4 LT |
7282 | return 0; |
7283 | } | |
7284 | ||
fd01b88c | 7285 | void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors) |
1f403624 | 7286 | { |
efa4b77b | 7287 | lockdep_assert_held(&mddev->reconfig_mutex); |
b522adcd DW |
7288 | |
7289 | if (mddev->external_size) | |
7290 | return; | |
7291 | ||
1f403624 DW |
7292 | mddev->array_sectors = array_sectors; |
7293 | } | |
7294 | EXPORT_SYMBOL(md_set_array_sectors); | |
7295 | ||
fd01b88c | 7296 | static int update_size(struct mddev *mddev, sector_t num_sectors) |
a35b0d69 | 7297 | { |
3cb03002 | 7298 | struct md_rdev *rdev; |
a35b0d69 | 7299 | int rv; |
d71f9f88 | 7300 | int fit = (num_sectors == 0); |
818da59f | 7301 | sector_t old_dev_sectors = mddev->dev_sectors; |
ab5a98b1 | 7302 | |
a35b0d69 N |
7303 | if (mddev->pers->resize == NULL) |
7304 | return -EINVAL; | |
d71f9f88 AN |
7305 | /* The "num_sectors" is the number of sectors of each device that |
7306 | * is used. This can only make sense for arrays with redundancy. | |
7307 | * linear and raid0 always use whatever space is available. We can only | |
7308 | * consider changing this number if no resync or reconstruction is | |
7309 | * happening, and if the new size is acceptable. It must fit before the | |
0f420358 | 7310 | * sb_start or, if that is <data_offset, it must fit before the size |
d71f9f88 AN |
7311 | * of each device. If num_sectors is zero, we find the largest size |
7312 | * that fits. | |
a35b0d69 | 7313 | */ |
f851b60d N |
7314 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
7315 | mddev->sync_thread) | |
a35b0d69 | 7316 | return -EBUSY; |
f97a5528 | 7317 | if (!md_is_rdwr(mddev)) |
bd8839e0 | 7318 | return -EROFS; |
a4a6125a | 7319 | |
dafb20fa | 7320 | rdev_for_each(rdev, mddev) { |
dd8ac336 | 7321 | sector_t avail = rdev->sectors; |
01ab5662 | 7322 | |
d71f9f88 AN |
7323 | if (fit && (num_sectors == 0 || num_sectors > avail)) |
7324 | num_sectors = avail; | |
7325 | if (avail < num_sectors) | |
a35b0d69 N |
7326 | return -ENOSPC; |
7327 | } | |
d71f9f88 | 7328 | rv = mddev->pers->resize(mddev, num_sectors); |
c9483634 | 7329 | if (!rv) { |
818da59f GJ |
7330 | if (mddev_is_clustered(mddev)) |
7331 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
7332 | else if (mddev->queue) { | |
2c247c51 CH |
7333 | set_capacity_and_notify(mddev->gendisk, |
7334 | mddev->array_sectors); | |
c9483634 GJ |
7335 | } |
7336 | } | |
a35b0d69 N |
7337 | return rv; |
7338 | } | |
7339 | ||
fd01b88c | 7340 | static int update_raid_disks(struct mddev *mddev, int raid_disks) |
da943b99 N |
7341 | { |
7342 | int rv; | |
c6563a8c | 7343 | struct md_rdev *rdev; |
da943b99 | 7344 | /* change the number of raid disks */ |
63c70c4f | 7345 | if (mddev->pers->check_reshape == NULL) |
da943b99 | 7346 | return -EINVAL; |
f97a5528 | 7347 | if (!md_is_rdwr(mddev)) |
bd8839e0 | 7348 | return -EROFS; |
da943b99 | 7349 | if (raid_disks <= 0 || |
233fca36 | 7350 | (mddev->max_disks && raid_disks >= mddev->max_disks)) |
da943b99 | 7351 | return -EINVAL; |
f851b60d N |
7352 | if (mddev->sync_thread || |
7353 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || | |
a8da01f7 | 7354 | test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) || |
f851b60d | 7355 | mddev->reshape_position != MaxSector) |
da943b99 | 7356 | return -EBUSY; |
c6563a8c N |
7357 | |
7358 | rdev_for_each(rdev, mddev) { | |
7359 | if (mddev->raid_disks < raid_disks && | |
7360 | rdev->data_offset < rdev->new_data_offset) | |
7361 | return -EINVAL; | |
7362 | if (mddev->raid_disks > raid_disks && | |
7363 | rdev->data_offset > rdev->new_data_offset) | |
7364 | return -EINVAL; | |
7365 | } | |
7366 | ||
63c70c4f | 7367 | mddev->delta_disks = raid_disks - mddev->raid_disks; |
2c810cdd N |
7368 | if (mddev->delta_disks < 0) |
7369 | mddev->reshape_backwards = 1; | |
7370 | else if (mddev->delta_disks > 0) | |
7371 | mddev->reshape_backwards = 0; | |
63c70c4f N |
7372 | |
7373 | rv = mddev->pers->check_reshape(mddev); | |
2c810cdd | 7374 | if (rv < 0) { |
de171cb9 | 7375 | mddev->delta_disks = 0; |
2c810cdd N |
7376 | mddev->reshape_backwards = 0; |
7377 | } | |
da943b99 N |
7378 | return rv; |
7379 | } | |
7380 | ||
1da177e4 LT |
7381 | /* |
7382 | * update_array_info is used to change the configuration of an | |
7383 | * on-line array. | |
7384 | * The version, ctime,level,size,raid_disks,not_persistent, layout,chunk_size | |
7385 | * fields in the info are checked against the array. | |
7386 | * Any differences that cannot be handled will cause an error. | |
7387 | * Normally, only one change can be managed at a time. | |
7388 | */ | |
fd01b88c | 7389 | static int update_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
7390 | { |
7391 | int rv = 0; | |
7392 | int cnt = 0; | |
36fa3063 N |
7393 | int state = 0; |
7394 | ||
7395 | /* calculate expected state,ignoring low bits */ | |
c3d9714e | 7396 | if (mddev->bitmap && mddev->bitmap_info.offset) |
36fa3063 | 7397 | state |= (1 << MD_SB_BITMAP_PRESENT); |
1da177e4 LT |
7398 | |
7399 | if (mddev->major_version != info->major_version || | |
7400 | mddev->minor_version != info->minor_version || | |
7401 | /* mddev->patch_version != info->patch_version || */ | |
7402 | mddev->ctime != info->ctime || | |
7403 | mddev->level != info->level || | |
7404 | /* mddev->layout != info->layout || */ | |
4e023612 | 7405 | mddev->persistent != !info->not_persistent || |
9d8f0363 | 7406 | mddev->chunk_sectors != info->chunk_size >> 9 || |
36fa3063 N |
7407 | /* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */ |
7408 | ((state^info->state) & 0xfffffe00) | |
7409 | ) | |
1da177e4 LT |
7410 | return -EINVAL; |
7411 | /* Check there is only one change */ | |
58c0fed4 AN |
7412 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
7413 | cnt++; | |
7414 | if (mddev->raid_disks != info->raid_disks) | |
7415 | cnt++; | |
7416 | if (mddev->layout != info->layout) | |
7417 | cnt++; | |
7418 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) | |
7419 | cnt++; | |
7420 | if (cnt == 0) | |
7421 | return 0; | |
7422 | if (cnt > 1) | |
7423 | return -EINVAL; | |
1da177e4 LT |
7424 | |
7425 | if (mddev->layout != info->layout) { | |
7426 | /* Change layout | |
7427 | * we don't need to do anything at the md level, the | |
7428 | * personality will take care of it all. | |
7429 | */ | |
50ac168a | 7430 | if (mddev->pers->check_reshape == NULL) |
1da177e4 | 7431 | return -EINVAL; |
597a711b N |
7432 | else { |
7433 | mddev->new_layout = info->layout; | |
50ac168a | 7434 | rv = mddev->pers->check_reshape(mddev); |
597a711b N |
7435 | if (rv) |
7436 | mddev->new_layout = mddev->layout; | |
7437 | return rv; | |
7438 | } | |
1da177e4 | 7439 | } |
58c0fed4 | 7440 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
d71f9f88 | 7441 | rv = update_size(mddev, (sector_t)info->size * 2); |
a35b0d69 | 7442 | |
da943b99 N |
7443 | if (mddev->raid_disks != info->raid_disks) |
7444 | rv = update_raid_disks(mddev, info->raid_disks); | |
7445 | ||
36fa3063 | 7446 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) { |
293467aa GR |
7447 | if (mddev->pers->quiesce == NULL || mddev->thread == NULL) { |
7448 | rv = -EINVAL; | |
7449 | goto err; | |
7450 | } | |
7451 | if (mddev->recovery || mddev->sync_thread) { | |
7452 | rv = -EBUSY; | |
7453 | goto err; | |
7454 | } | |
36fa3063 | 7455 | if (info->state & (1<<MD_SB_BITMAP_PRESENT)) { |
f9209a32 | 7456 | struct bitmap *bitmap; |
36fa3063 | 7457 | /* add the bitmap */ |
293467aa GR |
7458 | if (mddev->bitmap) { |
7459 | rv = -EEXIST; | |
7460 | goto err; | |
7461 | } | |
7462 | if (mddev->bitmap_info.default_offset == 0) { | |
7463 | rv = -EINVAL; | |
7464 | goto err; | |
7465 | } | |
c3d9714e N |
7466 | mddev->bitmap_info.offset = |
7467 | mddev->bitmap_info.default_offset; | |
6409bb05 N |
7468 | mddev->bitmap_info.space = |
7469 | mddev->bitmap_info.default_space; | |
e64e4018 | 7470 | bitmap = md_bitmap_create(mddev, -1); |
f9209a32 GR |
7471 | if (!IS_ERR(bitmap)) { |
7472 | mddev->bitmap = bitmap; | |
e64e4018 | 7473 | rv = md_bitmap_load(mddev); |
ba599aca N |
7474 | } else |
7475 | rv = PTR_ERR(bitmap); | |
36fa3063 | 7476 | if (rv) |
e64e4018 | 7477 | md_bitmap_destroy(mddev); |
36fa3063 N |
7478 | } else { |
7479 | /* remove the bitmap */ | |
293467aa GR |
7480 | if (!mddev->bitmap) { |
7481 | rv = -ENOENT; | |
7482 | goto err; | |
7483 | } | |
7484 | if (mddev->bitmap->storage.file) { | |
7485 | rv = -EINVAL; | |
7486 | goto err; | |
7487 | } | |
f6a2dc64 GJ |
7488 | if (mddev->bitmap_info.nodes) { |
7489 | /* hold PW on all the bitmap lock */ | |
7490 | if (md_cluster_ops->lock_all_bitmaps(mddev) <= 0) { | |
9d48739e | 7491 | pr_warn("md: can't change bitmap to none since the array is in use by more than one node\n"); |
f6a2dc64 GJ |
7492 | rv = -EPERM; |
7493 | md_cluster_ops->unlock_all_bitmaps(mddev); | |
7494 | goto err; | |
7495 | } | |
7496 | ||
7497 | mddev->bitmap_info.nodes = 0; | |
7498 | md_cluster_ops->leave(mddev); | |
edee9dfe | 7499 | module_put(md_cluster_mod); |
7c9d5c54 | 7500 | mddev->safemode_delay = DEFAULT_SAFEMODE_DELAY; |
f6a2dc64 | 7501 | } |
e64e4018 | 7502 | md_bitmap_destroy(mddev); |
c3d9714e | 7503 | mddev->bitmap_info.offset = 0; |
36fa3063 N |
7504 | } |
7505 | } | |
850b2b42 | 7506 | md_update_sb(mddev, 1); |
293467aa GR |
7507 | return rv; |
7508 | err: | |
1da177e4 LT |
7509 | return rv; |
7510 | } | |
7511 | ||
fd01b88c | 7512 | static int set_disk_faulty(struct mddev *mddev, dev_t dev) |
1da177e4 | 7513 | { |
3cb03002 | 7514 | struct md_rdev *rdev; |
1ca69c4b | 7515 | int err = 0; |
1da177e4 LT |
7516 | |
7517 | if (mddev->pers == NULL) | |
7518 | return -ENODEV; | |
7519 | ||
1ca69c4b | 7520 | rcu_read_lock(); |
1532d9e8 | 7521 | rdev = md_find_rdev_rcu(mddev, dev); |
1da177e4 | 7522 | if (!rdev) |
1ca69c4b N |
7523 | err = -ENODEV; |
7524 | else { | |
7525 | md_error(mddev, rdev); | |
9631abdb | 7526 | if (test_bit(MD_BROKEN, &mddev->flags)) |
1ca69c4b N |
7527 | err = -EBUSY; |
7528 | } | |
7529 | rcu_read_unlock(); | |
7530 | return err; | |
1da177e4 LT |
7531 | } |
7532 | ||
2f9618ce AN |
7533 | /* |
7534 | * We have a problem here : there is no easy way to give a CHS | |
7535 | * virtual geometry. We currently pretend that we have a 2 heads | |
7536 | * 4 sectors (with a BIG number of cylinders...). This drives | |
7537 | * dosfs just mad... ;-) | |
7538 | */ | |
a885c8c4 CH |
7539 | static int md_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
7540 | { | |
fd01b88c | 7541 | struct mddev *mddev = bdev->bd_disk->private_data; |
a885c8c4 CH |
7542 | |
7543 | geo->heads = 2; | |
7544 | geo->sectors = 4; | |
49ce6cea | 7545 | geo->cylinders = mddev->array_sectors / 8; |
a885c8c4 CH |
7546 | return 0; |
7547 | } | |
7548 | ||
cb335f88 NS |
7549 | static inline bool md_ioctl_valid(unsigned int cmd) |
7550 | { | |
7551 | switch (cmd) { | |
7552 | case ADD_NEW_DISK: | |
cb335f88 NS |
7553 | case GET_ARRAY_INFO: |
7554 | case GET_BITMAP_FILE: | |
7555 | case GET_DISK_INFO: | |
7556 | case HOT_ADD_DISK: | |
7557 | case HOT_REMOVE_DISK: | |
cb335f88 NS |
7558 | case RAID_VERSION: |
7559 | case RESTART_ARRAY_RW: | |
7560 | case RUN_ARRAY: | |
7561 | case SET_ARRAY_INFO: | |
7562 | case SET_BITMAP_FILE: | |
7563 | case SET_DISK_FAULTY: | |
7564 | case STOP_ARRAY: | |
7565 | case STOP_ARRAY_RO: | |
1aee41f6 | 7566 | case CLUSTERED_DISK_NACK: |
cb335f88 NS |
7567 | return true; |
7568 | default: | |
7569 | return false; | |
7570 | } | |
7571 | } | |
7572 | ||
1b0a2d95 YK |
7573 | static bool md_ioctl_need_suspend(unsigned int cmd) |
7574 | { | |
7575 | switch (cmd) { | |
7576 | case ADD_NEW_DISK: | |
7577 | case HOT_ADD_DISK: | |
7578 | case HOT_REMOVE_DISK: | |
7579 | case SET_BITMAP_FILE: | |
7580 | case SET_ARRAY_INFO: | |
7581 | return true; | |
7582 | default: | |
7583 | return false; | |
7584 | } | |
7585 | } | |
7586 | ||
2f6d261e YB |
7587 | static int __md_set_array_info(struct mddev *mddev, void __user *argp) |
7588 | { | |
7589 | mdu_array_info_t info; | |
7590 | int err; | |
7591 | ||
7592 | if (!argp) | |
7593 | memset(&info, 0, sizeof(info)); | |
7594 | else if (copy_from_user(&info, argp, sizeof(info))) | |
7595 | return -EFAULT; | |
7596 | ||
7597 | if (mddev->pers) { | |
7598 | err = update_array_info(mddev, &info); | |
7599 | if (err) | |
7600 | pr_warn("md: couldn't update array info. %d\n", err); | |
7601 | return err; | |
7602 | } | |
7603 | ||
7604 | if (!list_empty(&mddev->disks)) { | |
7605 | pr_warn("md: array %s already has disks!\n", mdname(mddev)); | |
7606 | return -EBUSY; | |
7607 | } | |
7608 | ||
7609 | if (mddev->raid_disks) { | |
7610 | pr_warn("md: array %s already initialised!\n", mdname(mddev)); | |
7611 | return -EBUSY; | |
7612 | } | |
7613 | ||
7614 | err = md_set_array_info(mddev, &info); | |
7615 | if (err) | |
7616 | pr_warn("md: couldn't set array info. %d\n", err); | |
7617 | ||
7618 | return err; | |
7619 | } | |
7620 | ||
05bdb996 | 7621 | static int md_ioctl(struct block_device *bdev, blk_mode_t mode, |
1da177e4 LT |
7622 | unsigned int cmd, unsigned long arg) |
7623 | { | |
7624 | int err = 0; | |
7625 | void __user *argp = (void __user *)arg; | |
fd01b88c | 7626 | struct mddev *mddev = NULL; |
065e519e | 7627 | bool did_set_md_closing = false; |
1da177e4 | 7628 | |
cb335f88 NS |
7629 | if (!md_ioctl_valid(cmd)) |
7630 | return -ENOTTY; | |
7631 | ||
506c9e44 N |
7632 | switch (cmd) { |
7633 | case RAID_VERSION: | |
7634 | case GET_ARRAY_INFO: | |
7635 | case GET_DISK_INFO: | |
7636 | break; | |
7637 | default: | |
7638 | if (!capable(CAP_SYS_ADMIN)) | |
7639 | return -EACCES; | |
7640 | } | |
1da177e4 LT |
7641 | |
7642 | /* | |
7643 | * Commands dealing with the RAID driver but not any | |
7644 | * particular array: | |
7645 | */ | |
c02c0aeb N |
7646 | switch (cmd) { |
7647 | case RAID_VERSION: | |
7648 | err = get_version(argp); | |
3adc28d8 | 7649 | goto out; |
c02c0aeb | 7650 | default:; |
1da177e4 LT |
7651 | } |
7652 | ||
7653 | /* | |
7654 | * Commands creating/starting a new array: | |
7655 | */ | |
7656 | ||
a39907fa | 7657 | mddev = bdev->bd_disk->private_data; |
1da177e4 LT |
7658 | |
7659 | if (!mddev) { | |
7660 | BUG(); | |
3adc28d8 | 7661 | goto out; |
1da177e4 LT |
7662 | } |
7663 | ||
1ca69c4b N |
7664 | /* Some actions do not requires the mutex */ |
7665 | switch (cmd) { | |
7666 | case GET_ARRAY_INFO: | |
7667 | if (!mddev->raid_disks && !mddev->external) | |
7668 | err = -ENODEV; | |
7669 | else | |
7670 | err = get_array_info(mddev, argp); | |
3adc28d8 | 7671 | goto out; |
1ca69c4b N |
7672 | |
7673 | case GET_DISK_INFO: | |
7674 | if (!mddev->raid_disks && !mddev->external) | |
7675 | err = -ENODEV; | |
7676 | else | |
7677 | err = get_disk_info(mddev, argp); | |
3adc28d8 | 7678 | goto out; |
1ca69c4b N |
7679 | |
7680 | case SET_DISK_FAULTY: | |
7681 | err = set_disk_faulty(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7682 | goto out; |
4af1a041 N |
7683 | |
7684 | case GET_BITMAP_FILE: | |
7685 | err = get_bitmap_file(mddev, argp); | |
7686 | goto out; | |
7687 | ||
1ca69c4b N |
7688 | } |
7689 | ||
90f5f7ad HR |
7690 | if (cmd == HOT_REMOVE_DISK) |
7691 | /* need to ensure recovery thread has run */ | |
7692 | wait_event_interruptible_timeout(mddev->sb_wait, | |
7693 | !test_bit(MD_RECOVERY_NEEDED, | |
82a301cb | 7694 | &mddev->recovery), |
90f5f7ad | 7695 | msecs_to_jiffies(5000)); |
260fa034 N |
7696 | if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) { |
7697 | /* Need to flush page cache, and ensure no-one else opens | |
7698 | * and writes | |
7699 | */ | |
7700 | mutex_lock(&mddev->open_mutex); | |
9ba3b7f5 | 7701 | if (mddev->pers && atomic_read(&mddev->openers) > 1) { |
260fa034 N |
7702 | mutex_unlock(&mddev->open_mutex); |
7703 | err = -EBUSY; | |
3adc28d8 | 7704 | goto out; |
260fa034 | 7705 | } |
c731b84b DJ |
7706 | if (test_and_set_bit(MD_CLOSING, &mddev->flags)) { |
7707 | mutex_unlock(&mddev->open_mutex); | |
7708 | err = -EBUSY; | |
7709 | goto out; | |
7710 | } | |
065e519e | 7711 | did_set_md_closing = true; |
260fa034 N |
7712 | mutex_unlock(&mddev->open_mutex); |
7713 | sync_blockdev(bdev); | |
7714 | } | |
81e2ce1b YK |
7715 | |
7716 | if (!md_is_rdwr(mddev)) | |
7717 | flush_work(&mddev->sync_work); | |
7718 | ||
1b0a2d95 YK |
7719 | err = md_ioctl_need_suspend(cmd) ? mddev_suspend_and_lock(mddev) : |
7720 | mddev_lock(mddev); | |
1da177e4 | 7721 | if (err) { |
9d48739e N |
7722 | pr_debug("md: ioctl lock interrupted, reason %d, cmd %d\n", |
7723 | err, cmd); | |
3adc28d8 | 7724 | goto out; |
1da177e4 LT |
7725 | } |
7726 | ||
c02c0aeb | 7727 | if (cmd == SET_ARRAY_INFO) { |
2f6d261e | 7728 | err = __md_set_array_info(mddev, argp); |
3adc28d8 | 7729 | goto unlock; |
1da177e4 LT |
7730 | } |
7731 | ||
7732 | /* | |
7733 | * Commands querying/configuring an existing array: | |
7734 | */ | |
32a7627c | 7735 | /* if we are not initialised yet, only ADD_NEW_DISK, STOP_ARRAY, |
3f9d7b0d | 7736 | * RUN_ARRAY, and GET_ and SET_BITMAP_FILE are allowed */ |
a17184a9 N |
7737 | if ((!mddev->raid_disks && !mddev->external) |
7738 | && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY | |
7739 | && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE | |
7740 | && cmd != GET_BITMAP_FILE) { | |
1da177e4 | 7741 | err = -ENODEV; |
3adc28d8 | 7742 | goto unlock; |
1da177e4 LT |
7743 | } |
7744 | ||
7745 | /* | |
7746 | * Commands even a read-only array can execute: | |
7747 | */ | |
c02c0aeb | 7748 | switch (cmd) { |
c02c0aeb N |
7749 | case RESTART_ARRAY_RW: |
7750 | err = restart_array(mddev); | |
3adc28d8 | 7751 | goto unlock; |
1da177e4 | 7752 | |
c02c0aeb N |
7753 | case STOP_ARRAY: |
7754 | err = do_md_stop(mddev, 0, bdev); | |
3adc28d8 | 7755 | goto unlock; |
1da177e4 | 7756 | |
c02c0aeb N |
7757 | case STOP_ARRAY_RO: |
7758 | err = md_set_readonly(mddev, bdev); | |
3adc28d8 | 7759 | goto unlock; |
1da177e4 | 7760 | |
3ea8929d N |
7761 | case HOT_REMOVE_DISK: |
7762 | err = hot_remove_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7763 | goto unlock; |
3ea8929d | 7764 | |
7ceb17e8 N |
7765 | case ADD_NEW_DISK: |
7766 | /* We can support ADD_NEW_DISK on read-only arrays | |
466ad292 | 7767 | * only if we are re-adding a preexisting device. |
7ceb17e8 N |
7768 | * So require mddev->pers and MD_DISK_SYNC. |
7769 | */ | |
7770 | if (mddev->pers) { | |
7771 | mdu_disk_info_t info; | |
7772 | if (copy_from_user(&info, argp, sizeof(info))) | |
7773 | err = -EFAULT; | |
7774 | else if (!(info.state & (1<<MD_DISK_SYNC))) | |
7775 | /* Need to clear read-only for this */ | |
7776 | break; | |
7777 | else | |
7e0adbfc | 7778 | err = md_add_new_disk(mddev, &info); |
3adc28d8 | 7779 | goto unlock; |
7ceb17e8 N |
7780 | } |
7781 | break; | |
1da177e4 LT |
7782 | } |
7783 | ||
7784 | /* | |
7785 | * The remaining ioctls are changing the state of the | |
f91de92e | 7786 | * superblock, so we do not allow them on read-only arrays. |
1da177e4 | 7787 | */ |
f97a5528 YB |
7788 | if (!md_is_rdwr(mddev) && mddev->pers) { |
7789 | if (mddev->ro != MD_AUTO_READ) { | |
f91de92e | 7790 | err = -EROFS; |
3adc28d8 | 7791 | goto unlock; |
f91de92e | 7792 | } |
f97a5528 YB |
7793 | mddev->ro = MD_RDWR; |
7794 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
7795 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7796 | /* mddev_unlock will wake thread */ | |
7797 | /* If a device failed while we were read-only, we | |
7798 | * need to make sure the metadata is updated now. | |
7799 | */ | |
7800 | if (test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) { | |
7801 | mddev_unlock(mddev); | |
7802 | wait_event(mddev->sb_wait, | |
7803 | !test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags) && | |
7804 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); | |
7805 | mddev_lock_nointr(mddev); | |
7806 | } | |
1da177e4 LT |
7807 | } |
7808 | ||
c02c0aeb N |
7809 | switch (cmd) { |
7810 | case ADD_NEW_DISK: | |
1da177e4 | 7811 | { |
c02c0aeb N |
7812 | mdu_disk_info_t info; |
7813 | if (copy_from_user(&info, argp, sizeof(info))) | |
7814 | err = -EFAULT; | |
7815 | else | |
7e0adbfc | 7816 | err = md_add_new_disk(mddev, &info); |
3adc28d8 | 7817 | goto unlock; |
c02c0aeb | 7818 | } |
1da177e4 | 7819 | |
1aee41f6 GR |
7820 | case CLUSTERED_DISK_NACK: |
7821 | if (mddev_is_clustered(mddev)) | |
7822 | md_cluster_ops->new_disk_ack(mddev, false); | |
7823 | else | |
7824 | err = -EINVAL; | |
7825 | goto unlock; | |
7826 | ||
c02c0aeb N |
7827 | case HOT_ADD_DISK: |
7828 | err = hot_add_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7829 | goto unlock; |
1da177e4 | 7830 | |
c02c0aeb N |
7831 | case RUN_ARRAY: |
7832 | err = do_md_run(mddev); | |
3adc28d8 | 7833 | goto unlock; |
1da177e4 | 7834 | |
c02c0aeb N |
7835 | case SET_BITMAP_FILE: |
7836 | err = set_bitmap_file(mddev, (int)arg); | |
3adc28d8 | 7837 | goto unlock; |
32a7627c | 7838 | |
c02c0aeb N |
7839 | default: |
7840 | err = -EINVAL; | |
3adc28d8 | 7841 | goto unlock; |
1da177e4 LT |
7842 | } |
7843 | ||
3adc28d8 | 7844 | unlock: |
d3374825 N |
7845 | if (mddev->hold_active == UNTIL_IOCTL && |
7846 | err != -EINVAL) | |
7847 | mddev->hold_active = 0; | |
1b0a2d95 YK |
7848 | |
7849 | md_ioctl_need_suspend(cmd) ? mddev_unlock_and_resume(mddev) : | |
7850 | mddev_unlock(mddev); | |
7851 | ||
3adc28d8 | 7852 | out: |
065e519e N |
7853 | if(did_set_md_closing) |
7854 | clear_bit(MD_CLOSING, &mddev->flags); | |
1da177e4 LT |
7855 | return err; |
7856 | } | |
aa98aa31 | 7857 | #ifdef CONFIG_COMPAT |
05bdb996 | 7858 | static int md_compat_ioctl(struct block_device *bdev, blk_mode_t mode, |
aa98aa31 AB |
7859 | unsigned int cmd, unsigned long arg) |
7860 | { | |
7861 | switch (cmd) { | |
7862 | case HOT_REMOVE_DISK: | |
7863 | case HOT_ADD_DISK: | |
7864 | case SET_DISK_FAULTY: | |
7865 | case SET_BITMAP_FILE: | |
7866 | /* These take in integer arg, do not convert */ | |
7867 | break; | |
7868 | default: | |
7869 | arg = (unsigned long)compat_ptr(arg); | |
7870 | break; | |
7871 | } | |
7872 | ||
7873 | return md_ioctl(bdev, mode, cmd, arg); | |
7874 | } | |
7875 | #endif /* CONFIG_COMPAT */ | |
1da177e4 | 7876 | |
118cf084 CH |
7877 | static int md_set_read_only(struct block_device *bdev, bool ro) |
7878 | { | |
7879 | struct mddev *mddev = bdev->bd_disk->private_data; | |
7880 | int err; | |
7881 | ||
7882 | err = mddev_lock(mddev); | |
7883 | if (err) | |
7884 | return err; | |
7885 | ||
7886 | if (!mddev->raid_disks && !mddev->external) { | |
7887 | err = -ENODEV; | |
7888 | goto out_unlock; | |
7889 | } | |
7890 | ||
7891 | /* | |
7892 | * Transitioning to read-auto need only happen for arrays that call | |
7893 | * md_write_start and which are not ready for writes yet. | |
7894 | */ | |
f97a5528 | 7895 | if (!ro && mddev->ro == MD_RDONLY && mddev->pers) { |
118cf084 CH |
7896 | err = restart_array(mddev); |
7897 | if (err) | |
7898 | goto out_unlock; | |
f97a5528 | 7899 | mddev->ro = MD_AUTO_READ; |
118cf084 CH |
7900 | } |
7901 | ||
7902 | out_unlock: | |
7903 | mddev_unlock(mddev); | |
7904 | return err; | |
7905 | } | |
7906 | ||
05bdb996 | 7907 | static int md_open(struct gendisk *disk, blk_mode_t mode) |
1da177e4 | 7908 | { |
5b26804b | 7909 | struct mddev *mddev; |
1da177e4 LT |
7910 | int err; |
7911 | ||
5b26804b | 7912 | spin_lock(&all_mddevs_lock); |
d32e2bf8 | 7913 | mddev = mddev_get(disk->private_data); |
5b26804b | 7914 | spin_unlock(&all_mddevs_lock); |
0c098220 YL |
7915 | if (!mddev) |
7916 | return -ENODEV; | |
7917 | ||
5b26804b CH |
7918 | err = mutex_lock_interruptible(&mddev->open_mutex); |
7919 | if (err) | |
1da177e4 LT |
7920 | goto out; |
7921 | ||
5b26804b CH |
7922 | err = -ENODEV; |
7923 | if (test_bit(MD_CLOSING, &mddev->flags)) | |
7924 | goto out_unlock; | |
af8d8e6f | 7925 | |
f2ea68cf | 7926 | atomic_inc(&mddev->openers); |
c8c00a69 | 7927 | mutex_unlock(&mddev->open_mutex); |
1da177e4 | 7928 | |
d32e2bf8 | 7929 | disk_check_media_change(disk); |
5b26804b CH |
7930 | return 0; |
7931 | ||
7932 | out_unlock: | |
7933 | mutex_unlock(&mddev->open_mutex); | |
7934 | out: | |
7935 | mddev_put(mddev); | |
1da177e4 LT |
7936 | return err; |
7937 | } | |
7938 | ||
ae220766 | 7939 | static void md_release(struct gendisk *disk) |
1da177e4 | 7940 | { |
f72ffdd6 | 7941 | struct mddev *mddev = disk->private_data; |
1da177e4 | 7942 | |
52e5f9d1 | 7943 | BUG_ON(!mddev); |
f2ea68cf | 7944 | atomic_dec(&mddev->openers); |
1da177e4 | 7945 | mddev_put(mddev); |
1da177e4 | 7946 | } |
f0b4f7e2 | 7947 | |
a564e23f | 7948 | static unsigned int md_check_events(struct gendisk *disk, unsigned int clearing) |
f0b4f7e2 | 7949 | { |
fd01b88c | 7950 | struct mddev *mddev = disk->private_data; |
a564e23f | 7951 | unsigned int ret = 0; |
f0b4f7e2 | 7952 | |
a564e23f CH |
7953 | if (mddev->changed) |
7954 | ret = DISK_EVENT_MEDIA_CHANGE; | |
f0b4f7e2 | 7955 | mddev->changed = 0; |
a564e23f | 7956 | return ret; |
f0b4f7e2 | 7957 | } |
a564e23f | 7958 | |
e8c59ac4 CH |
7959 | static void md_free_disk(struct gendisk *disk) |
7960 | { | |
7961 | struct mddev *mddev = disk->private_data; | |
7962 | ||
12a6caf2 | 7963 | mddev_free(mddev); |
e8c59ac4 CH |
7964 | } |
7965 | ||
7e0adbfc | 7966 | const struct block_device_operations md_fops = |
1da177e4 LT |
7967 | { |
7968 | .owner = THIS_MODULE, | |
c62b37d9 | 7969 | .submit_bio = md_submit_bio, |
a39907fa AV |
7970 | .open = md_open, |
7971 | .release = md_release, | |
b492b852 | 7972 | .ioctl = md_ioctl, |
aa98aa31 AB |
7973 | #ifdef CONFIG_COMPAT |
7974 | .compat_ioctl = md_compat_ioctl, | |
7975 | #endif | |
a885c8c4 | 7976 | .getgeo = md_getgeo, |
a564e23f | 7977 | .check_events = md_check_events, |
118cf084 | 7978 | .set_read_only = md_set_read_only, |
e8c59ac4 | 7979 | .free_disk = md_free_disk, |
1da177e4 LT |
7980 | }; |
7981 | ||
f72ffdd6 | 7982 | static int md_thread(void *arg) |
1da177e4 | 7983 | { |
2b8bf345 | 7984 | struct md_thread *thread = arg; |
1da177e4 | 7985 | |
1da177e4 LT |
7986 | /* |
7987 | * md_thread is a 'system-thread', it's priority should be very | |
7988 | * high. We avoid resource deadlocks individually in each | |
7989 | * raid personality. (RAID5 does preallocation) We also use RR and | |
7990 | * the very same RT priority as kswapd, thus we will never get | |
7991 | * into a priority inversion deadlock. | |
7992 | * | |
7993 | * we definitely have to have equal or higher priority than | |
7994 | * bdflush, otherwise bdflush will deadlock if there are too | |
7995 | * many dirty RAID5 blocks. | |
7996 | */ | |
1da177e4 | 7997 | |
6985c43f | 7998 | allow_signal(SIGKILL); |
a6fb0934 | 7999 | while (!kthread_should_stop()) { |
1da177e4 | 8000 | |
93588e22 N |
8001 | /* We need to wait INTERRUPTIBLE so that |
8002 | * we don't add to the load-average. | |
8003 | * That means we need to be sure no signals are | |
8004 | * pending | |
8005 | */ | |
8006 | if (signal_pending(current)) | |
8007 | flush_signals(current); | |
8008 | ||
8009 | wait_event_interruptible_timeout | |
8010 | (thread->wqueue, | |
8011 | test_bit(THREAD_WAKEUP, &thread->flags) | |
ce1ccd07 | 8012 | || kthread_should_stop() || kthread_should_park(), |
93588e22 | 8013 | thread->timeout); |
1da177e4 | 8014 | |
6c987910 | 8015 | clear_bit(THREAD_WAKEUP, &thread->flags); |
ce1ccd07 SL |
8016 | if (kthread_should_park()) |
8017 | kthread_parkme(); | |
6c987910 | 8018 | if (!kthread_should_stop()) |
4ed8731d | 8019 | thread->run(thread); |
1da177e4 | 8020 | } |
a6fb0934 | 8021 | |
1da177e4 LT |
8022 | return 0; |
8023 | } | |
8024 | ||
44693154 | 8025 | static void md_wakeup_thread_directly(struct md_thread __rcu *thread) |
e5e9b9cb | 8026 | { |
44693154 YK |
8027 | struct md_thread *t; |
8028 | ||
8029 | rcu_read_lock(); | |
8030 | t = rcu_dereference(thread); | |
8031 | if (t) | |
8032 | wake_up_process(t->tsk); | |
8033 | rcu_read_unlock(); | |
e5e9b9cb YK |
8034 | } |
8035 | ||
44693154 | 8036 | void md_wakeup_thread(struct md_thread __rcu *thread) |
1da177e4 | 8037 | { |
44693154 YK |
8038 | struct md_thread *t; |
8039 | ||
8040 | rcu_read_lock(); | |
8041 | t = rcu_dereference(thread); | |
8042 | if (t) { | |
8043 | pr_debug("md: waking up MD thread %s.\n", t->tsk->comm); | |
8044 | set_bit(THREAD_WAKEUP, &t->flags); | |
8045 | wake_up(&t->wqueue); | |
1da177e4 | 8046 | } |
44693154 | 8047 | rcu_read_unlock(); |
1da177e4 | 8048 | } |
6c144d31 | 8049 | EXPORT_SYMBOL(md_wakeup_thread); |
1da177e4 | 8050 | |
4ed8731d SL |
8051 | struct md_thread *md_register_thread(void (*run) (struct md_thread *), |
8052 | struct mddev *mddev, const char *name) | |
1da177e4 | 8053 | { |
2b8bf345 | 8054 | struct md_thread *thread; |
1da177e4 | 8055 | |
2b8bf345 | 8056 | thread = kzalloc(sizeof(struct md_thread), GFP_KERNEL); |
1da177e4 LT |
8057 | if (!thread) |
8058 | return NULL; | |
8059 | ||
1da177e4 LT |
8060 | init_waitqueue_head(&thread->wqueue); |
8061 | ||
1da177e4 LT |
8062 | thread->run = run; |
8063 | thread->mddev = mddev; | |
32a7627c | 8064 | thread->timeout = MAX_SCHEDULE_TIMEOUT; |
0da3c619 N |
8065 | thread->tsk = kthread_run(md_thread, thread, |
8066 | "%s_%s", | |
8067 | mdname(thread->mddev), | |
0232605d | 8068 | name); |
a6fb0934 | 8069 | if (IS_ERR(thread->tsk)) { |
1da177e4 LT |
8070 | kfree(thread); |
8071 | return NULL; | |
8072 | } | |
1da177e4 LT |
8073 | return thread; |
8074 | } | |
6c144d31 | 8075 | EXPORT_SYMBOL(md_register_thread); |
1da177e4 | 8076 | |
7eb8ff02 | 8077 | void md_unregister_thread(struct mddev *mddev, struct md_thread __rcu **threadp) |
1da177e4 | 8078 | { |
7eb8ff02 LL |
8079 | struct md_thread *thread = rcu_dereference_protected(*threadp, |
8080 | lockdep_is_held(&mddev->reconfig_mutex)); | |
1e267742 | 8081 | |
44693154 | 8082 | if (!thread) |
1e267742 | 8083 | return; |
44693154 YK |
8084 | |
8085 | rcu_assign_pointer(*threadp, NULL); | |
8086 | synchronize_rcu(); | |
a6fb0934 | 8087 | |
1e267742 | 8088 | pr_debug("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk)); |
a6fb0934 | 8089 | kthread_stop(thread->tsk); |
1da177e4 LT |
8090 | kfree(thread); |
8091 | } | |
6c144d31 | 8092 | EXPORT_SYMBOL(md_unregister_thread); |
1da177e4 | 8093 | |
fd01b88c | 8094 | void md_error(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 8095 | { |
b2d444d7 | 8096 | if (!rdev || test_bit(Faulty, &rdev->flags)) |
1da177e4 | 8097 | return; |
6bfe0b49 | 8098 | |
de393cde | 8099 | if (!mddev->pers || !mddev->pers->error_handler) |
1da177e4 | 8100 | return; |
9631abdb MT |
8101 | mddev->pers->error_handler(mddev, rdev); |
8102 | ||
849d18e2 | 8103 | if (mddev->pers->level == 0) |
c31fea2f MT |
8104 | return; |
8105 | ||
9631abdb | 8106 | if (mddev->degraded && !test_bit(MD_BROKEN, &mddev->flags)) |
72a23c21 | 8107 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
00bcb4ac | 8108 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 | 8109 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
9631abdb MT |
8110 | if (!test_bit(MD_BROKEN, &mddev->flags)) { |
8111 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8112 | md_wakeup_thread(mddev->thread); | |
8113 | } | |
768a418d | 8114 | if (mddev->event_work.func) |
e804ac78 | 8115 | queue_work(md_misc_wq, &mddev->event_work); |
54679486 | 8116 | md_new_event(); |
1da177e4 | 8117 | } |
6c144d31 | 8118 | EXPORT_SYMBOL(md_error); |
1da177e4 LT |
8119 | |
8120 | /* seq_file implementation /proc/mdstat */ | |
8121 | ||
8122 | static void status_unused(struct seq_file *seq) | |
8123 | { | |
8124 | int i = 0; | |
3cb03002 | 8125 | struct md_rdev *rdev; |
1da177e4 LT |
8126 | |
8127 | seq_printf(seq, "unused devices: "); | |
8128 | ||
159ec1fc | 8129 | list_for_each_entry(rdev, &pending_raid_disks, same_set) { |
1da177e4 | 8130 | i++; |
913cce5a | 8131 | seq_printf(seq, "%pg ", rdev->bdev); |
1da177e4 LT |
8132 | } |
8133 | if (!i) | |
8134 | seq_printf(seq, "<none>"); | |
8135 | ||
8136 | seq_printf(seq, "\n"); | |
8137 | } | |
8138 | ||
f9cfe7e7 YK |
8139 | static void status_personalities(struct seq_file *seq) |
8140 | { | |
8141 | struct md_personality *pers; | |
8142 | ||
8143 | seq_puts(seq, "Personalities : "); | |
8144 | spin_lock(&pers_lock); | |
8145 | list_for_each_entry(pers, &pers_list, list) | |
8146 | seq_printf(seq, "[%s] ", pers->name); | |
8147 | ||
8148 | spin_unlock(&pers_lock); | |
8149 | seq_puts(seq, "\n"); | |
8150 | } | |
8151 | ||
f7851be7 | 8152 | static int status_resync(struct seq_file *seq, struct mddev *mddev) |
1da177e4 | 8153 | { |
dd71cf6b | 8154 | sector_t max_sectors, resync, res; |
9642fa73 MT |
8155 | unsigned long dt, db = 0; |
8156 | sector_t rt, curr_mark_cnt, resync_mark_cnt; | |
8157 | int scale, recovery_active; | |
4588b42e | 8158 | unsigned int per_milli; |
1da177e4 | 8159 | |
c804cdec N |
8160 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8161 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
dd71cf6b | 8162 | max_sectors = mddev->resync_max_sectors; |
1da177e4 | 8163 | else |
dd71cf6b | 8164 | max_sectors = mddev->dev_sectors; |
1da177e4 | 8165 | |
f7851be7 | 8166 | resync = mddev->curr_resync; |
eac58d08 | 8167 | if (resync < MD_RESYNC_ACTIVE) { |
f7851be7 N |
8168 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) |
8169 | /* Still cleaning up */ | |
8170 | resync = max_sectors; | |
b368856a | 8171 | } else if (resync > max_sectors) { |
d2e2ec82 | 8172 | resync = max_sectors; |
b368856a | 8173 | } else { |
6efddf1e YK |
8174 | res = atomic_read(&mddev->recovery_active); |
8175 | /* | |
8176 | * Resync has started, but the subtraction has overflowed or | |
8177 | * yielded one of the special values. Force it to active to | |
8178 | * ensure the status reports an active resync. | |
8179 | */ | |
8180 | if (resync < res || resync - res < MD_RESYNC_ACTIVE) | |
b368856a | 8181 | resync = MD_RESYNC_ACTIVE; |
6efddf1e YK |
8182 | else |
8183 | resync -= res; | |
b368856a | 8184 | } |
f7851be7 | 8185 | |
eac58d08 | 8186 | if (resync == MD_RESYNC_NONE) { |
0357ba27 GJ |
8187 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery)) { |
8188 | struct md_rdev *rdev; | |
8189 | ||
8190 | rdev_for_each(rdev, mddev) | |
8191 | if (rdev->raid_disk >= 0 && | |
8192 | !test_bit(Faulty, &rdev->flags) && | |
8193 | rdev->recovery_offset != MaxSector && | |
8194 | rdev->recovery_offset) { | |
8195 | seq_printf(seq, "\trecover=REMOTE"); | |
8196 | return 1; | |
8197 | } | |
8198 | if (mddev->reshape_position != MaxSector) | |
8199 | seq_printf(seq, "\treshape=REMOTE"); | |
8200 | else | |
8201 | seq_printf(seq, "\tresync=REMOTE"); | |
8202 | return 1; | |
8203 | } | |
f7851be7 N |
8204 | if (mddev->recovery_cp < MaxSector) { |
8205 | seq_printf(seq, "\tresync=PENDING"); | |
8206 | return 1; | |
8207 | } | |
8208 | return 0; | |
8209 | } | |
eac58d08 | 8210 | if (resync < MD_RESYNC_ACTIVE) { |
f7851be7 N |
8211 | seq_printf(seq, "\tresync=DELAYED"); |
8212 | return 1; | |
8213 | } | |
8214 | ||
403df478 | 8215 | WARN_ON(max_sectors == 0); |
4588b42e | 8216 | /* Pick 'scale' such that (resync>>scale)*1000 will fit |
dd71cf6b | 8217 | * in a sector_t, and (max_sectors>>scale) will fit in a |
4588b42e N |
8218 | * u32, as those are the requirements for sector_div. |
8219 | * Thus 'scale' must be at least 10 | |
8220 | */ | |
8221 | scale = 10; | |
8222 | if (sizeof(sector_t) > sizeof(unsigned long)) { | |
dd71cf6b | 8223 | while ( max_sectors/2 > (1ULL<<(scale+32))) |
4588b42e N |
8224 | scale++; |
8225 | } | |
8226 | res = (resync>>scale)*1000; | |
dd71cf6b | 8227 | sector_div(res, (u32)((max_sectors>>scale)+1)); |
4588b42e N |
8228 | |
8229 | per_milli = res; | |
1da177e4 | 8230 | { |
4588b42e | 8231 | int i, x = per_milli/50, y = 20-x; |
1da177e4 LT |
8232 | seq_printf(seq, "["); |
8233 | for (i = 0; i < x; i++) | |
8234 | seq_printf(seq, "="); | |
8235 | seq_printf(seq, ">"); | |
8236 | for (i = 0; i < y; i++) | |
8237 | seq_printf(seq, "."); | |
8238 | seq_printf(seq, "] "); | |
8239 | } | |
4588b42e | 8240 | seq_printf(seq, " %s =%3u.%u%% (%llu/%llu)", |
ccfcc3c1 N |
8241 | (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)? |
8242 | "reshape" : | |
61df9d91 N |
8243 | (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)? |
8244 | "check" : | |
8245 | (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? | |
8246 | "resync" : "recovery"))), | |
8247 | per_milli/10, per_milli % 10, | |
dd71cf6b N |
8248 | (unsigned long long) resync/2, |
8249 | (unsigned long long) max_sectors/2); | |
1da177e4 LT |
8250 | |
8251 | /* | |
1da177e4 LT |
8252 | * dt: time from mark until now |
8253 | * db: blocks written from mark until now | |
8254 | * rt: remaining time | |
dd71cf6b | 8255 | * |
9642fa73 MT |
8256 | * rt is a sector_t, which is always 64bit now. We are keeping |
8257 | * the original algorithm, but it is not really necessary. | |
8258 | * | |
8259 | * Original algorithm: | |
8260 | * So we divide before multiply in case it is 32bit and close | |
8261 | * to the limit. | |
8262 | * We scale the divisor (db) by 32 to avoid losing precision | |
8263 | * near the end of resync when the number of remaining sectors | |
8264 | * is close to 'db'. | |
8265 | * We then divide rt by 32 after multiplying by db to compensate. | |
8266 | * The '+1' avoids division by zero if db is very small. | |
1da177e4 LT |
8267 | */ |
8268 | dt = ((jiffies - mddev->resync_mark) / HZ); | |
8269 | if (!dt) dt++; | |
9642fa73 MT |
8270 | |
8271 | curr_mark_cnt = mddev->curr_mark_cnt; | |
8272 | recovery_active = atomic_read(&mddev->recovery_active); | |
8273 | resync_mark_cnt = mddev->resync_mark_cnt; | |
8274 | ||
8275 | if (curr_mark_cnt >= (recovery_active + resync_mark_cnt)) | |
8276 | db = curr_mark_cnt - (recovery_active + resync_mark_cnt); | |
1da177e4 | 8277 | |
dd71cf6b | 8278 | rt = max_sectors - resync; /* number of remaining sectors */ |
9642fa73 | 8279 | rt = div64_u64(rt, db/32+1); |
dd71cf6b N |
8280 | rt *= dt; |
8281 | rt >>= 5; | |
8282 | ||
8283 | seq_printf(seq, " finish=%lu.%lumin", (unsigned long)rt / 60, | |
8284 | ((unsigned long)rt % 60)/6); | |
1da177e4 | 8285 | |
ff4e8d9a | 8286 | seq_printf(seq, " speed=%ldK/sec", db/2/dt); |
f7851be7 | 8287 | return 1; |
1da177e4 LT |
8288 | } |
8289 | ||
8290 | static void *md_seq_start(struct seq_file *seq, loff_t *pos) | |
cf1b6d44 | 8291 | __acquires(&all_mddevs_lock) |
1da177e4 | 8292 | { |
cf1b6d44 | 8293 | seq->poll_event = atomic_read(&md_event_count); |
1da177e4 | 8294 | spin_lock(&all_mddevs_lock); |
cf1b6d44 | 8295 | |
f9cfe7e7 | 8296 | return seq_list_start_head(&all_mddevs, *pos); |
1da177e4 LT |
8297 | } |
8298 | ||
8299 | static void *md_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
8300 | { | |
cf1b6d44 | 8301 | return seq_list_next(v, &all_mddevs, pos); |
1da177e4 LT |
8302 | } |
8303 | ||
8304 | static void md_seq_stop(struct seq_file *seq, void *v) | |
cf1b6d44 | 8305 | __releases(&all_mddevs_lock) |
1da177e4 | 8306 | { |
cf1b6d44 | 8307 | spin_unlock(&all_mddevs_lock); |
1da177e4 LT |
8308 | } |
8309 | ||
8310 | static int md_seq_show(struct seq_file *seq, void *v) | |
8311 | { | |
f9cfe7e7 | 8312 | struct mddev *mddev; |
dd8ac336 | 8313 | sector_t sectors; |
3cb03002 | 8314 | struct md_rdev *rdev; |
1da177e4 | 8315 | |
f9cfe7e7 YK |
8316 | if (v == &all_mddevs) { |
8317 | status_personalities(seq); | |
8318 | if (list_empty(&all_mddevs)) | |
8319 | status_unused(seq); | |
8320 | return 0; | |
8321 | } | |
8322 | ||
8323 | mddev = list_entry(v, struct mddev, all_mddevs); | |
cf1b6d44 | 8324 | if (!mddev_get(mddev)) |
1da177e4 | 8325 | return 0; |
1da177e4 | 8326 | |
cf1b6d44 | 8327 | spin_unlock(&all_mddevs_lock); |
36d091f4 | 8328 | spin_lock(&mddev->lock); |
1da177e4 LT |
8329 | if (mddev->pers || mddev->raid_disks || !list_empty(&mddev->disks)) { |
8330 | seq_printf(seq, "%s : %sactive", mdname(mddev), | |
8331 | mddev->pers ? "" : "in"); | |
8332 | if (mddev->pers) { | |
f97a5528 | 8333 | if (mddev->ro == MD_RDONLY) |
1da177e4 | 8334 | seq_printf(seq, " (read-only)"); |
f97a5528 | 8335 | if (mddev->ro == MD_AUTO_READ) |
52720ae7 | 8336 | seq_printf(seq, " (auto-read-only)"); |
1da177e4 LT |
8337 | seq_printf(seq, " %s", mddev->pers->name); |
8338 | } | |
8339 | ||
dd8ac336 | 8340 | sectors = 0; |
f97fcad3 N |
8341 | rcu_read_lock(); |
8342 | rdev_for_each_rcu(rdev, mddev) { | |
913cce5a CH |
8343 | seq_printf(seq, " %pg[%d]", rdev->bdev, rdev->desc_nr); |
8344 | ||
8ddf9efe N |
8345 | if (test_bit(WriteMostly, &rdev->flags)) |
8346 | seq_printf(seq, "(W)"); | |
9efdca16 SL |
8347 | if (test_bit(Journal, &rdev->flags)) |
8348 | seq_printf(seq, "(J)"); | |
b2d444d7 | 8349 | if (test_bit(Faulty, &rdev->flags)) { |
1da177e4 LT |
8350 | seq_printf(seq, "(F)"); |
8351 | continue; | |
2d78f8c4 N |
8352 | } |
8353 | if (rdev->raid_disk < 0) | |
b325a32e | 8354 | seq_printf(seq, "(S)"); /* spare */ |
2d78f8c4 N |
8355 | if (test_bit(Replacement, &rdev->flags)) |
8356 | seq_printf(seq, "(R)"); | |
dd8ac336 | 8357 | sectors += rdev->sectors; |
1da177e4 | 8358 | } |
f97fcad3 | 8359 | rcu_read_unlock(); |
1da177e4 LT |
8360 | |
8361 | if (!list_empty(&mddev->disks)) { | |
8362 | if (mddev->pers) | |
8363 | seq_printf(seq, "\n %llu blocks", | |
f233ea5c AN |
8364 | (unsigned long long) |
8365 | mddev->array_sectors / 2); | |
1da177e4 LT |
8366 | else |
8367 | seq_printf(seq, "\n %llu blocks", | |
dd8ac336 | 8368 | (unsigned long long)sectors / 2); |
1da177e4 | 8369 | } |
1cd6bf19 N |
8370 | if (mddev->persistent) { |
8371 | if (mddev->major_version != 0 || | |
8372 | mddev->minor_version != 90) { | |
8373 | seq_printf(seq," super %d.%d", | |
8374 | mddev->major_version, | |
8375 | mddev->minor_version); | |
8376 | } | |
e691063a N |
8377 | } else if (mddev->external) |
8378 | seq_printf(seq, " super external:%s", | |
8379 | mddev->metadata_type); | |
8380 | else | |
1cd6bf19 | 8381 | seq_printf(seq, " super non-persistent"); |
1da177e4 LT |
8382 | |
8383 | if (mddev->pers) { | |
d710e138 | 8384 | mddev->pers->status(seq, mddev); |
f72ffdd6 | 8385 | seq_printf(seq, "\n "); |
8e1b39d6 | 8386 | if (mddev->pers->sync_request) { |
f7851be7 | 8387 | if (status_resync(seq, mddev)) |
8e1b39d6 | 8388 | seq_printf(seq, "\n "); |
8e1b39d6 | 8389 | } |
32a7627c N |
8390 | } else |
8391 | seq_printf(seq, "\n "); | |
8392 | ||
e64e4018 | 8393 | md_bitmap_status(seq, mddev->bitmap); |
1da177e4 LT |
8394 | |
8395 | seq_printf(seq, "\n"); | |
8396 | } | |
36d091f4 | 8397 | spin_unlock(&mddev->lock); |
cf1b6d44 | 8398 | spin_lock(&all_mddevs_lock); |
f9cfe7e7 YK |
8399 | |
8400 | if (mddev == list_last_entry(&all_mddevs, struct mddev, all_mddevs)) | |
8401 | status_unused(seq); | |
8402 | ||
cf1b6d44 YK |
8403 | if (atomic_dec_and_test(&mddev->active)) |
8404 | __mddev_put(mddev); | |
f72ffdd6 | 8405 | |
1da177e4 LT |
8406 | return 0; |
8407 | } | |
8408 | ||
110518bc | 8409 | static const struct seq_operations md_seq_ops = { |
1da177e4 LT |
8410 | .start = md_seq_start, |
8411 | .next = md_seq_next, | |
8412 | .stop = md_seq_stop, | |
8413 | .show = md_seq_show, | |
8414 | }; | |
8415 | ||
8416 | static int md_seq_open(struct inode *inode, struct file *file) | |
8417 | { | |
f1514638 | 8418 | struct seq_file *seq; |
1da177e4 LT |
8419 | int error; |
8420 | ||
8421 | error = seq_open(file, &md_seq_ops); | |
d7603b7e | 8422 | if (error) |
f1514638 KS |
8423 | return error; |
8424 | ||
8425 | seq = file->private_data; | |
8426 | seq->poll_event = atomic_read(&md_event_count); | |
1da177e4 LT |
8427 | return error; |
8428 | } | |
8429 | ||
e2f23b60 | 8430 | static int md_unloading; |
afc9a42b | 8431 | static __poll_t mdstat_poll(struct file *filp, poll_table *wait) |
d7603b7e | 8432 | { |
f1514638 | 8433 | struct seq_file *seq = filp->private_data; |
afc9a42b | 8434 | __poll_t mask; |
d7603b7e | 8435 | |
e2f23b60 | 8436 | if (md_unloading) |
a9a08845 | 8437 | return EPOLLIN|EPOLLRDNORM|EPOLLERR|EPOLLPRI; |
d7603b7e N |
8438 | poll_wait(filp, &md_event_waiters, wait); |
8439 | ||
8440 | /* always allow read */ | |
a9a08845 | 8441 | mask = EPOLLIN | EPOLLRDNORM; |
d7603b7e | 8442 | |
f1514638 | 8443 | if (seq->poll_event != atomic_read(&md_event_count)) |
a9a08845 | 8444 | mask |= EPOLLERR | EPOLLPRI; |
d7603b7e N |
8445 | return mask; |
8446 | } | |
8447 | ||
97a32539 AD |
8448 | static const struct proc_ops mdstat_proc_ops = { |
8449 | .proc_open = md_seq_open, | |
8450 | .proc_read = seq_read, | |
8451 | .proc_lseek = seq_lseek, | |
8452 | .proc_release = seq_release, | |
8453 | .proc_poll = mdstat_poll, | |
1da177e4 LT |
8454 | }; |
8455 | ||
84fc4b56 | 8456 | int register_md_personality(struct md_personality *p) |
1da177e4 | 8457 | { |
9d48739e N |
8458 | pr_debug("md: %s personality registered for level %d\n", |
8459 | p->name, p->level); | |
1da177e4 | 8460 | spin_lock(&pers_lock); |
2604b703 | 8461 | list_add_tail(&p->list, &pers_list); |
1da177e4 LT |
8462 | spin_unlock(&pers_lock); |
8463 | return 0; | |
8464 | } | |
6c144d31 | 8465 | EXPORT_SYMBOL(register_md_personality); |
1da177e4 | 8466 | |
84fc4b56 | 8467 | int unregister_md_personality(struct md_personality *p) |
1da177e4 | 8468 | { |
9d48739e | 8469 | pr_debug("md: %s personality unregistered\n", p->name); |
1da177e4 | 8470 | spin_lock(&pers_lock); |
2604b703 | 8471 | list_del_init(&p->list); |
1da177e4 LT |
8472 | spin_unlock(&pers_lock); |
8473 | return 0; | |
8474 | } | |
6c144d31 | 8475 | EXPORT_SYMBOL(unregister_md_personality); |
1da177e4 | 8476 | |
6022e75b N |
8477 | int register_md_cluster_operations(struct md_cluster_operations *ops, |
8478 | struct module *module) | |
edb39c9d | 8479 | { |
6022e75b | 8480 | int ret = 0; |
edb39c9d | 8481 | spin_lock(&pers_lock); |
6022e75b N |
8482 | if (md_cluster_ops != NULL) |
8483 | ret = -EALREADY; | |
8484 | else { | |
8485 | md_cluster_ops = ops; | |
8486 | md_cluster_mod = module; | |
8487 | } | |
edb39c9d | 8488 | spin_unlock(&pers_lock); |
6022e75b | 8489 | return ret; |
edb39c9d GR |
8490 | } |
8491 | EXPORT_SYMBOL(register_md_cluster_operations); | |
8492 | ||
8493 | int unregister_md_cluster_operations(void) | |
8494 | { | |
8495 | spin_lock(&pers_lock); | |
8496 | md_cluster_ops = NULL; | |
8497 | spin_unlock(&pers_lock); | |
8498 | return 0; | |
8499 | } | |
8500 | EXPORT_SYMBOL(unregister_md_cluster_operations); | |
8501 | ||
8502 | int md_setup_cluster(struct mddev *mddev, int nodes) | |
8503 | { | |
7c9d5c54 | 8504 | int ret; |
47a7b0d8 GJ |
8505 | if (!md_cluster_ops) |
8506 | request_module("md-cluster"); | |
edb39c9d | 8507 | spin_lock(&pers_lock); |
47a7b0d8 | 8508 | /* ensure module won't be unloaded */ |
edb39c9d | 8509 | if (!md_cluster_ops || !try_module_get(md_cluster_mod)) { |
dd3dc5f4 | 8510 | pr_warn("can't find md-cluster module or get its reference.\n"); |
edb39c9d GR |
8511 | spin_unlock(&pers_lock); |
8512 | return -ENOENT; | |
8513 | } | |
8514 | spin_unlock(&pers_lock); | |
8515 | ||
7c9d5c54 ZH |
8516 | ret = md_cluster_ops->join(mddev, nodes); |
8517 | if (!ret) | |
8518 | mddev->safemode_delay = 0; | |
8519 | return ret; | |
edb39c9d GR |
8520 | } |
8521 | ||
8522 | void md_cluster_stop(struct mddev *mddev) | |
8523 | { | |
c4ce867f GR |
8524 | if (!md_cluster_ops) |
8525 | return; | |
edb39c9d GR |
8526 | md_cluster_ops->leave(mddev); |
8527 | module_put(md_cluster_mod); | |
8528 | } | |
8529 | ||
fd01b88c | 8530 | static int is_mddev_idle(struct mddev *mddev, int init) |
1da177e4 | 8531 | { |
f72ffdd6 | 8532 | struct md_rdev *rdev; |
1da177e4 | 8533 | int idle; |
eea1bf38 | 8534 | int curr_events; |
1da177e4 LT |
8535 | |
8536 | idle = 1; | |
4b80991c N |
8537 | rcu_read_lock(); |
8538 | rdev_for_each_rcu(rdev, mddev) { | |
4245e52d | 8539 | struct gendisk *disk = rdev->bdev->bd_disk; |
8446fe92 | 8540 | curr_events = (int)part_stat_read_accum(disk->part0, sectors) - |
eea1bf38 | 8541 | atomic_read(&disk->sync_io); |
713f6ab1 N |
8542 | /* sync IO will cause sync_io to increase before the disk_stats |
8543 | * as sync_io is counted when a request starts, and | |
8544 | * disk_stats is counted when it completes. | |
8545 | * So resync activity will cause curr_events to be smaller than | |
8546 | * when there was no such activity. | |
8547 | * non-sync IO will cause disk_stat to increase without | |
8548 | * increasing sync_io so curr_events will (eventually) | |
8549 | * be larger than it was before. Once it becomes | |
8550 | * substantially larger, the test below will cause | |
8551 | * the array to appear non-idle, and resync will slow | |
8552 | * down. | |
8553 | * If there is a lot of outstanding resync activity when | |
8554 | * we set last_event to curr_events, then all that activity | |
8555 | * completing might cause the array to appear non-idle | |
8556 | * and resync will be slowed down even though there might | |
8557 | * not have been non-resync activity. This will only | |
8558 | * happen once though. 'last_events' will soon reflect | |
8559 | * the state where there is little or no outstanding | |
8560 | * resync requests, and further resync activity will | |
8561 | * always make curr_events less than last_events. | |
c0e48521 | 8562 | * |
1da177e4 | 8563 | */ |
eea1bf38 | 8564 | if (init || curr_events - rdev->last_events > 64) { |
1da177e4 LT |
8565 | rdev->last_events = curr_events; |
8566 | idle = 0; | |
8567 | } | |
8568 | } | |
4b80991c | 8569 | rcu_read_unlock(); |
1da177e4 LT |
8570 | return idle; |
8571 | } | |
8572 | ||
fd01b88c | 8573 | void md_done_sync(struct mddev *mddev, int blocks, int ok) |
1da177e4 LT |
8574 | { |
8575 | /* another "blocks" (512byte) blocks have been synced */ | |
8576 | atomic_sub(blocks, &mddev->recovery_active); | |
8577 | wake_up(&mddev->recovery_wait); | |
8578 | if (!ok) { | |
dfc70645 | 8579 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
0a19caab | 8580 | set_bit(MD_RECOVERY_ERROR, &mddev->recovery); |
1da177e4 LT |
8581 | md_wakeup_thread(mddev->thread); |
8582 | // stop recovery, signal do_sync .... | |
8583 | } | |
8584 | } | |
6c144d31 | 8585 | EXPORT_SYMBOL(md_done_sync); |
1da177e4 | 8586 | |
06d91a5f N |
8587 | /* md_write_start(mddev, bi) |
8588 | * If we need to update some array metadata (e.g. 'active' flag | |
3d310eb7 N |
8589 | * in superblock) before writing, schedule a superblock update |
8590 | * and wait for it to complete. | |
cc27b0c7 N |
8591 | * A return value of 'false' means that the write wasn't recorded |
8592 | * and cannot proceed as the array is being suspend. | |
06d91a5f | 8593 | */ |
cc27b0c7 | 8594 | bool md_write_start(struct mddev *mddev, struct bio *bi) |
1da177e4 | 8595 | { |
0fd62b86 | 8596 | int did_change = 0; |
4b6c1060 | 8597 | |
06d91a5f | 8598 | if (bio_data_dir(bi) != WRITE) |
cc27b0c7 | 8599 | return true; |
06d91a5f | 8600 | |
f97a5528 YB |
8601 | BUG_ON(mddev->ro == MD_RDONLY); |
8602 | if (mddev->ro == MD_AUTO_READ) { | |
f91de92e | 8603 | /* need to switch to read/write */ |
81e2ce1b | 8604 | flush_work(&mddev->sync_work); |
f97a5528 | 8605 | mddev->ro = MD_RDWR; |
f91de92e N |
8606 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
8607 | md_wakeup_thread(mddev->thread); | |
25156198 | 8608 | md_wakeup_thread(mddev->sync_thread); |
0fd62b86 | 8609 | did_change = 1; |
f91de92e | 8610 | } |
4ad23a97 N |
8611 | rcu_read_lock(); |
8612 | percpu_ref_get(&mddev->writes_pending); | |
55cc39f3 | 8613 | smp_mb(); /* Match smp_mb in set_in_sync() */ |
31a59e34 N |
8614 | if (mddev->safemode == 1) |
8615 | mddev->safemode = 0; | |
4ad23a97 | 8616 | /* sync_checkers is always 0 when writes_pending is in per-cpu mode */ |
81fe48e9 | 8617 | if (mddev->in_sync || mddev->sync_checkers) { |
85572d7c | 8618 | spin_lock(&mddev->lock); |
3d310eb7 N |
8619 | if (mddev->in_sync) { |
8620 | mddev->in_sync = 0; | |
2953079c SL |
8621 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8622 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
3d310eb7 | 8623 | md_wakeup_thread(mddev->thread); |
0fd62b86 | 8624 | did_change = 1; |
3d310eb7 | 8625 | } |
85572d7c | 8626 | spin_unlock(&mddev->lock); |
06d91a5f | 8627 | } |
4ad23a97 | 8628 | rcu_read_unlock(); |
0fd62b86 | 8629 | if (did_change) |
00bcb4ac | 8630 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
4b6c1060 HM |
8631 | if (!mddev->has_superblocks) |
8632 | return true; | |
09a44cc1 | 8633 | wait_event(mddev->sb_wait, |
d47c8ad2 | 8634 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags) || |
d1932913 | 8635 | is_md_suspended(mddev)); |
cc27b0c7 N |
8636 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) { |
8637 | percpu_ref_put(&mddev->writes_pending); | |
8638 | return false; | |
8639 | } | |
8640 | return true; | |
1da177e4 | 8641 | } |
6c144d31 | 8642 | EXPORT_SYMBOL(md_write_start); |
1da177e4 | 8643 | |
49728050 N |
8644 | /* md_write_inc can only be called when md_write_start() has |
8645 | * already been called at least once of the current request. | |
8646 | * It increments the counter and is useful when a single request | |
8647 | * is split into several parts. Each part causes an increment and | |
8648 | * so needs a matching md_write_end(). | |
8649 | * Unlike md_write_start(), it is safe to call md_write_inc() inside | |
8650 | * a spinlocked region. | |
8651 | */ | |
8652 | void md_write_inc(struct mddev *mddev, struct bio *bi) | |
8653 | { | |
8654 | if (bio_data_dir(bi) != WRITE) | |
8655 | return; | |
f97a5528 | 8656 | WARN_ON_ONCE(mddev->in_sync || !md_is_rdwr(mddev)); |
4ad23a97 | 8657 | percpu_ref_get(&mddev->writes_pending); |
49728050 N |
8658 | } |
8659 | EXPORT_SYMBOL(md_write_inc); | |
8660 | ||
fd01b88c | 8661 | void md_write_end(struct mddev *mddev) |
1da177e4 | 8662 | { |
4ad23a97 N |
8663 | percpu_ref_put(&mddev->writes_pending); |
8664 | ||
8665 | if (mddev->safemode == 2) | |
8666 | md_wakeup_thread(mddev->thread); | |
8667 | else if (mddev->safemode_delay) | |
8668 | /* The roundup() ensures this only performs locking once | |
8669 | * every ->safemode_delay jiffies | |
8670 | */ | |
8671 | mod_timer(&mddev->safemode_timer, | |
8672 | roundup(jiffies, mddev->safemode_delay) + | |
8673 | mddev->safemode_delay); | |
1da177e4 | 8674 | } |
4ad23a97 | 8675 | |
6c144d31 | 8676 | EXPORT_SYMBOL(md_write_end); |
1da177e4 | 8677 | |
cf78408f XN |
8678 | /* This is used by raid0 and raid10 */ |
8679 | void md_submit_discard_bio(struct mddev *mddev, struct md_rdev *rdev, | |
8680 | struct bio *bio, sector_t start, sector_t size) | |
8681 | { | |
8682 | struct bio *discard_bio = NULL; | |
8683 | ||
44abff2c | 8684 | if (__blkdev_issue_discard(rdev->bdev, start, size, GFP_NOIO, |
cf78408f XN |
8685 | &discard_bio) || !discard_bio) |
8686 | return; | |
8687 | ||
8688 | bio_chain(discard_bio, bio); | |
8689 | bio_clone_blkg_association(discard_bio, bio); | |
8690 | if (mddev->gendisk) | |
8691 | trace_block_bio_remap(discard_bio, | |
8692 | disk_devt(mddev->gendisk), | |
8693 | bio->bi_iter.bi_sector); | |
8694 | submit_bio_noacct(discard_bio); | |
8695 | } | |
8696 | EXPORT_SYMBOL_GPL(md_submit_discard_bio); | |
8697 | ||
c687297b | 8698 | static void md_end_clone_io(struct bio *bio) |
0c031fd3 | 8699 | { |
c687297b YK |
8700 | struct md_io_clone *md_io_clone = bio->bi_private; |
8701 | struct bio *orig_bio = md_io_clone->orig_bio; | |
8702 | struct mddev *mddev = md_io_clone->mddev; | |
10764815 | 8703 | |
45b47895 SL |
8704 | if (bio->bi_status && !orig_bio->bi_status) |
8705 | orig_bio->bi_status = bio->bi_status; | |
10764815 | 8706 | |
c687297b YK |
8707 | if (md_io_clone->start_time) |
8708 | bio_end_io_acct(orig_bio, md_io_clone->start_time); | |
8709 | ||
10764815 GJ |
8710 | bio_put(bio); |
8711 | bio_endio(orig_bio); | |
76fed014 | 8712 | percpu_ref_put(&mddev->active_io); |
10764815 GJ |
8713 | } |
8714 | ||
c687297b | 8715 | static void md_clone_bio(struct mddev *mddev, struct bio **bio) |
10764815 | 8716 | { |
abfc426d | 8717 | struct block_device *bdev = (*bio)->bi_bdev; |
c687297b YK |
8718 | struct md_io_clone *md_io_clone; |
8719 | struct bio *clone = | |
8720 | bio_alloc_clone(bdev, *bio, GFP_NOIO, &mddev->io_clone_set); | |
8721 | ||
8722 | md_io_clone = container_of(clone, struct md_io_clone, bio_clone); | |
8723 | md_io_clone->orig_bio = *bio; | |
8724 | md_io_clone->mddev = mddev; | |
8725 | if (blk_queue_io_stat(bdev->bd_disk->queue)) | |
8726 | md_io_clone->start_time = bio_start_io_acct(*bio); | |
8727 | ||
8728 | clone->bi_end_io = md_end_clone_io; | |
8729 | clone->bi_private = md_io_clone; | |
8730 | *bio = clone; | |
8731 | } | |
10764815 | 8732 | |
c687297b YK |
8733 | void md_account_bio(struct mddev *mddev, struct bio **bio) |
8734 | { | |
76fed014 | 8735 | percpu_ref_get(&mddev->active_io); |
c687297b | 8736 | md_clone_bio(mddev, bio); |
10764815 GJ |
8737 | } |
8738 | EXPORT_SYMBOL_GPL(md_account_bio); | |
8739 | ||
2a2275d6 N |
8740 | /* md_allow_write(mddev) |
8741 | * Calling this ensures that the array is marked 'active' so that writes | |
8742 | * may proceed without blocking. It is important to call this before | |
8743 | * attempting a GFP_KERNEL allocation while holding the mddev lock. | |
8744 | * Must be called with mddev_lock held. | |
8745 | */ | |
2214c260 | 8746 | void md_allow_write(struct mddev *mddev) |
2a2275d6 N |
8747 | { |
8748 | if (!mddev->pers) | |
2214c260 | 8749 | return; |
f97a5528 | 8750 | if (!md_is_rdwr(mddev)) |
2214c260 | 8751 | return; |
1a0fd497 | 8752 | if (!mddev->pers->sync_request) |
2214c260 | 8753 | return; |
2a2275d6 | 8754 | |
85572d7c | 8755 | spin_lock(&mddev->lock); |
2a2275d6 N |
8756 | if (mddev->in_sync) { |
8757 | mddev->in_sync = 0; | |
2953079c SL |
8758 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8759 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
2a2275d6 N |
8760 | if (mddev->safemode_delay && |
8761 | mddev->safemode == 0) | |
8762 | mddev->safemode = 1; | |
85572d7c | 8763 | spin_unlock(&mddev->lock); |
2a2275d6 | 8764 | md_update_sb(mddev, 0); |
00bcb4ac | 8765 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
2214c260 AP |
8766 | /* wait for the dirty state to be recorded in the metadata */ |
8767 | wait_event(mddev->sb_wait, | |
2214c260 | 8768 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
2a2275d6 | 8769 | } else |
85572d7c | 8770 | spin_unlock(&mddev->lock); |
2a2275d6 N |
8771 | } |
8772 | EXPORT_SYMBOL_GPL(md_allow_write); | |
8773 | ||
1da177e4 LT |
8774 | #define SYNC_MARKS 10 |
8775 | #define SYNC_MARK_STEP (3*HZ) | |
54f89341 | 8776 | #define UPDATE_FREQUENCY (5*60*HZ) |
4ed8731d | 8777 | void md_do_sync(struct md_thread *thread) |
1da177e4 | 8778 | { |
4ed8731d | 8779 | struct mddev *mddev = thread->mddev; |
fd01b88c | 8780 | struct mddev *mddev2; |
e5b521ee | 8781 | unsigned int currspeed = 0, window; |
ac7e50a3 | 8782 | sector_t max_sectors,j, io_sectors, recovery_done; |
1da177e4 | 8783 | unsigned long mark[SYNC_MARKS]; |
54f89341 | 8784 | unsigned long update_time; |
1da177e4 LT |
8785 | sector_t mark_cnt[SYNC_MARKS]; |
8786 | int last_mark,m; | |
1da177e4 | 8787 | sector_t last_check; |
57afd89f | 8788 | int skipped = 0; |
3cb03002 | 8789 | struct md_rdev *rdev; |
c4a39551 | 8790 | char *desc, *action = NULL; |
7c2c57c9 | 8791 | struct blk_plug plug; |
41a9a0dc | 8792 | int ret; |
1da177e4 LT |
8793 | |
8794 | /* just incase thread restarts... */ | |
82ec0ae5 | 8795 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) |
1da177e4 | 8796 | return; |
82ec0ae5 YK |
8797 | |
8798 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) | |
8799 | goto skip; | |
8800 | ||
8801 | if (test_bit(MD_RECOVERY_WAIT, &mddev->recovery) || | |
8802 | !md_is_rdwr(mddev)) {/* never try to sync a read-only array */ | |
3991b31e | 8803 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
82ec0ae5 | 8804 | goto skip; |
3991b31e | 8805 | } |
1da177e4 | 8806 | |
41a9a0dc GJ |
8807 | if (mddev_is_clustered(mddev)) { |
8808 | ret = md_cluster_ops->resync_start(mddev); | |
8809 | if (ret) | |
8810 | goto skip; | |
8811 | ||
bb8bf15b | 8812 | set_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags); |
41a9a0dc GJ |
8813 | if (!(test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8814 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) || | |
8815 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) | |
8816 | && ((unsigned long long)mddev->curr_resync_completed | |
8817 | < (unsigned long long)mddev->resync_max_sectors)) | |
8818 | goto skip; | |
8819 | } | |
8820 | ||
61df9d91 | 8821 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
c4a39551 | 8822 | if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) { |
61df9d91 | 8823 | desc = "data-check"; |
c4a39551 JB |
8824 | action = "check"; |
8825 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
61df9d91 | 8826 | desc = "requested-resync"; |
c4a39551 JB |
8827 | action = "repair"; |
8828 | } else | |
61df9d91 N |
8829 | desc = "resync"; |
8830 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
8831 | desc = "reshape"; | |
8832 | else | |
8833 | desc = "recovery"; | |
8834 | ||
c4a39551 JB |
8835 | mddev->last_sync_action = action ?: desc; |
8836 | ||
eac58d08 | 8837 | /* |
1da177e4 LT |
8838 | * Before starting a resync we must have set curr_resync to |
8839 | * 2, and then checked that every "conflicting" array has curr_resync | |
8840 | * less than ours. When we find one that is the same or higher | |
8841 | * we wait on resync_wait. To avoid deadlock, we reduce curr_resync | |
8842 | * to 1 if we choose to yield (based arbitrarily on address of mddev structure). | |
8843 | * This will mean we have to start checking from the beginning again. | |
8844 | * | |
8845 | */ | |
8846 | ||
8847 | do { | |
c622ca54 | 8848 | int mddev2_minor = -1; |
eac58d08 | 8849 | mddev->curr_resync = MD_RESYNC_DELAYED; |
1da177e4 LT |
8850 | |
8851 | try_again: | |
404e4b43 | 8852 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
1da177e4 | 8853 | goto skip; |
b0e706a1 CH |
8854 | spin_lock(&all_mddevs_lock); |
8855 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) { | |
12a6caf2 CH |
8856 | if (test_bit(MD_DELETED, &mddev2->flags)) |
8857 | continue; | |
1da177e4 LT |
8858 | if (mddev2 == mddev) |
8859 | continue; | |
90b08710 BS |
8860 | if (!mddev->parallel_resync |
8861 | && mddev2->curr_resync | |
8862 | && match_mddev_units(mddev, mddev2)) { | |
1da177e4 | 8863 | DEFINE_WAIT(wq); |
eac58d08 LG |
8864 | if (mddev < mddev2 && |
8865 | mddev->curr_resync == MD_RESYNC_DELAYED) { | |
1da177e4 | 8866 | /* arbitrarily yield */ |
eac58d08 | 8867 | mddev->curr_resync = MD_RESYNC_YIELDED; |
1da177e4 LT |
8868 | wake_up(&resync_wait); |
8869 | } | |
eac58d08 LG |
8870 | if (mddev > mddev2 && |
8871 | mddev->curr_resync == MD_RESYNC_YIELDED) | |
1da177e4 LT |
8872 | /* no need to wait here, we can wait the next |
8873 | * time 'round when curr_resync == 2 | |
8874 | */ | |
8875 | continue; | |
9744197c N |
8876 | /* We need to wait 'interruptible' so as not to |
8877 | * contribute to the load average, and not to | |
8878 | * be caught by 'softlockup' | |
8879 | */ | |
8880 | prepare_to_wait(&resync_wait, &wq, TASK_INTERRUPTIBLE); | |
c91abf5a | 8881 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
8712e553 | 8882 | mddev2->curr_resync >= mddev->curr_resync) { |
c622ca54 AP |
8883 | if (mddev2_minor != mddev2->md_minor) { |
8884 | mddev2_minor = mddev2->md_minor; | |
9d48739e N |
8885 | pr_info("md: delaying %s of %s until %s has finished (they share one or more physical units)\n", |
8886 | desc, mdname(mddev), | |
8887 | mdname(mddev2)); | |
c622ca54 | 8888 | } |
b0e706a1 CH |
8889 | spin_unlock(&all_mddevs_lock); |
8890 | ||
9744197c N |
8891 | if (signal_pending(current)) |
8892 | flush_signals(current); | |
1da177e4 LT |
8893 | schedule(); |
8894 | finish_wait(&resync_wait, &wq); | |
8895 | goto try_again; | |
8896 | } | |
8897 | finish_wait(&resync_wait, &wq); | |
8898 | } | |
8899 | } | |
b0e706a1 | 8900 | spin_unlock(&all_mddevs_lock); |
eac58d08 | 8901 | } while (mddev->curr_resync < MD_RESYNC_DELAYED); |
1da177e4 | 8902 | |
5fd6c1dc | 8903 | j = 0; |
9d88883e | 8904 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
1da177e4 | 8905 | /* resync follows the size requested by the personality, |
57afd89f | 8906 | * which defaults to physical size, but can be virtual size |
1da177e4 LT |
8907 | */ |
8908 | max_sectors = mddev->resync_max_sectors; | |
7f7583d4 | 8909 | atomic64_set(&mddev->resync_mismatches, 0); |
5fd6c1dc | 8910 | /* we don't use the checkpoint if there's a bitmap */ |
5e96ee65 NB |
8911 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) |
8912 | j = mddev->resync_min; | |
8913 | else if (!mddev->bitmap) | |
5fd6c1dc | 8914 | j = mddev->recovery_cp; |
5e96ee65 | 8915 | |
cb9ee154 | 8916 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) { |
c804cdec | 8917 | max_sectors = mddev->resync_max_sectors; |
cb9ee154 GJ |
8918 | /* |
8919 | * If the original node aborts reshaping then we continue the | |
8920 | * reshaping, so set j again to avoid restart reshape from the | |
8921 | * first beginning | |
8922 | */ | |
8923 | if (mddev_is_clustered(mddev) && | |
8924 | mddev->reshape_position != MaxSector) | |
8925 | j = mddev->reshape_position; | |
8926 | } else { | |
1da177e4 | 8927 | /* recovery follows the physical size of devices */ |
58c0fed4 | 8928 | max_sectors = mddev->dev_sectors; |
5fd6c1dc | 8929 | j = MaxSector; |
4e59ca7d | 8930 | rcu_read_lock(); |
dafb20fa | 8931 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 8932 | if (rdev->raid_disk >= 0 && |
f2076e7d | 8933 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
8934 | !test_bit(Faulty, &rdev->flags) && |
8935 | !test_bit(In_sync, &rdev->flags) && | |
8936 | rdev->recovery_offset < j) | |
8937 | j = rdev->recovery_offset; | |
4e59ca7d | 8938 | rcu_read_unlock(); |
133d4527 N |
8939 | |
8940 | /* If there is a bitmap, we need to make sure all | |
8941 | * writes that started before we added a spare | |
8942 | * complete before we start doing a recovery. | |
8943 | * Otherwise the write might complete and (via | |
8944 | * bitmap_endwrite) set a bit in the bitmap after the | |
8945 | * recovery has checked that bit and skipped that | |
8946 | * region. | |
8947 | */ | |
8948 | if (mddev->bitmap) { | |
8949 | mddev->pers->quiesce(mddev, 1); | |
8950 | mddev->pers->quiesce(mddev, 0); | |
8951 | } | |
5fd6c1dc | 8952 | } |
1da177e4 | 8953 | |
9d48739e N |
8954 | pr_info("md: %s of RAID array %s\n", desc, mdname(mddev)); |
8955 | pr_debug("md: minimum _guaranteed_ speed: %d KB/sec/disk.\n", speed_min(mddev)); | |
8956 | pr_debug("md: using maximum available idle IO bandwidth (but not more than %d KB/sec) for %s.\n", | |
8957 | speed_max(mddev), desc); | |
1da177e4 | 8958 | |
eea1bf38 | 8959 | is_mddev_idle(mddev, 1); /* this initializes IO event counters */ |
5fd6c1dc | 8960 | |
57afd89f | 8961 | io_sectors = 0; |
1da177e4 LT |
8962 | for (m = 0; m < SYNC_MARKS; m++) { |
8963 | mark[m] = jiffies; | |
57afd89f | 8964 | mark_cnt[m] = io_sectors; |
1da177e4 LT |
8965 | } |
8966 | last_mark = 0; | |
8967 | mddev->resync_mark = mark[last_mark]; | |
8968 | mddev->resync_mark_cnt = mark_cnt[last_mark]; | |
8969 | ||
8970 | /* | |
8971 | * Tune reconstruction: | |
8972 | */ | |
e5b521ee | 8973 | window = 32 * (PAGE_SIZE / 512); |
9d48739e N |
8974 | pr_debug("md: using %dk window, over a total of %lluk.\n", |
8975 | window/2, (unsigned long long)max_sectors/2); | |
1da177e4 LT |
8976 | |
8977 | atomic_set(&mddev->recovery_active, 0); | |
1da177e4 LT |
8978 | last_check = 0; |
8979 | ||
ed821cf8 | 8980 | if (j >= MD_RESYNC_ACTIVE) { |
9d48739e N |
8981 | pr_debug("md: resuming %s of %s from checkpoint.\n", |
8982 | desc, mdname(mddev)); | |
1da177e4 | 8983 | mddev->curr_resync = j; |
72f36d59 | 8984 | } else |
eac58d08 | 8985 | mddev->curr_resync = MD_RESYNC_ACTIVE; /* no longer delayed */ |
75d3da43 | 8986 | mddev->curr_resync_completed = j; |
e1a86dbb | 8987 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
54679486 | 8988 | md_new_event(); |
54f89341 | 8989 | update_time = jiffies; |
1da177e4 | 8990 | |
7c2c57c9 | 8991 | blk_start_plug(&plug); |
1da177e4 | 8992 | while (j < max_sectors) { |
57afd89f | 8993 | sector_t sectors; |
1da177e4 | 8994 | |
57afd89f | 8995 | skipped = 0; |
97e4f42d | 8996 | |
7a91ee1f N |
8997 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8998 | ((mddev->curr_resync > mddev->curr_resync_completed && | |
8999 | (mddev->curr_resync - mddev->curr_resync_completed) | |
9000 | > (max_sectors >> 4)) || | |
54f89341 | 9001 | time_after_eq(jiffies, update_time + UPDATE_FREQUENCY) || |
7a91ee1f | 9002 | (j - mddev->curr_resync_completed)*2 |
c5e19d90 N |
9003 | >= mddev->resync_max - mddev->curr_resync_completed || |
9004 | mddev->curr_resync_completed > mddev->resync_max | |
7a91ee1f | 9005 | )) { |
97e4f42d | 9006 | /* time to update curr_resync_completed */ |
97e4f42d N |
9007 | wait_event(mddev->recovery_wait, |
9008 | atomic_read(&mddev->recovery_active) == 0); | |
75d3da43 | 9009 | mddev->curr_resync_completed = j; |
35d78c66 | 9010 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && |
9011 | j > mddev->recovery_cp) | |
9012 | mddev->recovery_cp = j; | |
54f89341 | 9013 | update_time = jiffies; |
2953079c | 9014 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
e1a86dbb | 9015 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
97e4f42d | 9016 | } |
acb180b0 | 9017 | |
c91abf5a N |
9018 | while (j >= mddev->resync_max && |
9019 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
e62e58a5 N |
9020 | /* As this condition is controlled by user-space, |
9021 | * we can block indefinitely, so use '_interruptible' | |
9022 | * to avoid triggering warnings. | |
9023 | */ | |
9024 | flush_signals(current); /* just in case */ | |
9025 | wait_event_interruptible(mddev->recovery_wait, | |
9026 | mddev->resync_max > j | |
c91abf5a N |
9027 | || test_bit(MD_RECOVERY_INTR, |
9028 | &mddev->recovery)); | |
e62e58a5 | 9029 | } |
acb180b0 | 9030 | |
c91abf5a N |
9031 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
9032 | break; | |
acb180b0 | 9033 | |
09314799 | 9034 | sectors = mddev->pers->sync_request(mddev, j, &skipped); |
57afd89f | 9035 | if (sectors == 0) { |
dfc70645 | 9036 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
c91abf5a | 9037 | break; |
1da177e4 | 9038 | } |
57afd89f N |
9039 | |
9040 | if (!skipped) { /* actual IO requested */ | |
9041 | io_sectors += sectors; | |
9042 | atomic_add(sectors, &mddev->recovery_active); | |
9043 | } | |
9044 | ||
e875ecea N |
9045 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
9046 | break; | |
9047 | ||
1da177e4 | 9048 | j += sectors; |
5ed1df2e N |
9049 | if (j > max_sectors) |
9050 | /* when skipping, extra large numbers can be returned. */ | |
9051 | j = max_sectors; | |
ed821cf8 | 9052 | if (j >= MD_RESYNC_ACTIVE) |
72f36d59 | 9053 | mddev->curr_resync = j; |
ff4e8d9a | 9054 | mddev->curr_mark_cnt = io_sectors; |
d7603b7e | 9055 | if (last_check == 0) |
e875ecea | 9056 | /* this is the earliest that rebuild will be |
d7603b7e N |
9057 | * visible in /proc/mdstat |
9058 | */ | |
54679486 | 9059 | md_new_event(); |
57afd89f N |
9060 | |
9061 | if (last_check + window > io_sectors || j == max_sectors) | |
1da177e4 LT |
9062 | continue; |
9063 | ||
57afd89f | 9064 | last_check = io_sectors; |
1da177e4 LT |
9065 | repeat: |
9066 | if (time_after_eq(jiffies, mark[last_mark] + SYNC_MARK_STEP )) { | |
9067 | /* step marks */ | |
9068 | int next = (last_mark+1) % SYNC_MARKS; | |
9069 | ||
9070 | mddev->resync_mark = mark[next]; | |
9071 | mddev->resync_mark_cnt = mark_cnt[next]; | |
9072 | mark[next] = jiffies; | |
57afd89f | 9073 | mark_cnt[next] = io_sectors - atomic_read(&mddev->recovery_active); |
1da177e4 LT |
9074 | last_mark = next; |
9075 | } | |
9076 | ||
c91abf5a N |
9077 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
9078 | break; | |
1da177e4 LT |
9079 | |
9080 | /* | |
9081 | * this loop exits only if either when we are slower than | |
9082 | * the 'hard' speed limit, or the system was IO-idle for | |
9083 | * a jiffy. | |
9084 | * the system might be non-idle CPU-wise, but we only care | |
9085 | * about not overloading the IO subsystem. (things like an | |
9086 | * e2fsck being done on the RAID array should execute fast) | |
9087 | */ | |
1da177e4 LT |
9088 | cond_resched(); |
9089 | ||
ac7e50a3 XN |
9090 | recovery_done = io_sectors - atomic_read(&mddev->recovery_active); |
9091 | currspeed = ((unsigned long)(recovery_done - mddev->resync_mark_cnt))/2 | |
57afd89f | 9092 | /((jiffies-mddev->resync_mark)/HZ +1) +1; |
1da177e4 | 9093 | |
88202a0c | 9094 | if (currspeed > speed_min(mddev)) { |
ac8fa419 | 9095 | if (currspeed > speed_max(mddev)) { |
c0e48521 | 9096 | msleep(500); |
1da177e4 LT |
9097 | goto repeat; |
9098 | } | |
ac8fa419 N |
9099 | if (!is_mddev_idle(mddev, 0)) { |
9100 | /* | |
9101 | * Give other IO more of a chance. | |
9102 | * The faster the devices, the less we wait. | |
9103 | */ | |
9104 | wait_event(mddev->recovery_wait, | |
9105 | !atomic_read(&mddev->recovery_active)); | |
9106 | } | |
1da177e4 LT |
9107 | } |
9108 | } | |
9d48739e N |
9109 | pr_info("md: %s: %s %s.\n",mdname(mddev), desc, |
9110 | test_bit(MD_RECOVERY_INTR, &mddev->recovery) | |
9111 | ? "interrupted" : "done"); | |
1da177e4 LT |
9112 | /* |
9113 | * this also signals 'finished resyncing' to md_stop | |
9114 | */ | |
7c2c57c9 | 9115 | blk_finish_plug(&plug); |
1da177e4 LT |
9116 | wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active)); |
9117 | ||
5ed1df2e N |
9118 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9119 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
eac58d08 | 9120 | mddev->curr_resync >= MD_RESYNC_ACTIVE) { |
5ed1df2e | 9121 | mddev->curr_resync_completed = mddev->curr_resync; |
e1a86dbb | 9122 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
5ed1df2e | 9123 | } |
09314799 | 9124 | mddev->pers->sync_request(mddev, max_sectors, &skipped); |
1da177e4 | 9125 | |
dfc70645 | 9126 | if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) && |
1d1f25bf | 9127 | mddev->curr_resync > MD_RESYNC_ACTIVE) { |
5fd6c1dc N |
9128 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
9129 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
9130 | if (mddev->curr_resync >= mddev->recovery_cp) { | |
9d48739e N |
9131 | pr_debug("md: checkpointing %s of %s.\n", |
9132 | desc, mdname(mddev)); | |
0a19caab | 9133 | if (test_bit(MD_RECOVERY_ERROR, |
9134 | &mddev->recovery)) | |
9135 | mddev->recovery_cp = | |
9136 | mddev->curr_resync_completed; | |
9137 | else | |
9138 | mddev->recovery_cp = | |
9139 | mddev->curr_resync; | |
5fd6c1dc N |
9140 | } |
9141 | } else | |
9142 | mddev->recovery_cp = MaxSector; | |
9143 | } else { | |
9144 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) | |
9145 | mddev->curr_resync = MaxSector; | |
db0505d3 N |
9146 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9147 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) { | |
9148 | rcu_read_lock(); | |
9149 | rdev_for_each_rcu(rdev, mddev) | |
9150 | if (rdev->raid_disk >= 0 && | |
9151 | mddev->delta_disks >= 0 && | |
9152 | !test_bit(Journal, &rdev->flags) && | |
9153 | !test_bit(Faulty, &rdev->flags) && | |
9154 | !test_bit(In_sync, &rdev->flags) && | |
9155 | rdev->recovery_offset < mddev->curr_resync) | |
9156 | rdev->recovery_offset = mddev->curr_resync; | |
9157 | rcu_read_unlock(); | |
9158 | } | |
5fd6c1dc | 9159 | } |
1da177e4 | 9160 | } |
db91ff55 | 9161 | skip: |
bb8bf15b GJ |
9162 | /* set CHANGE_PENDING here since maybe another update is needed, |
9163 | * so other nodes are informed. It should be harmless for normal | |
9164 | * raid */ | |
2953079c SL |
9165 | set_mask_bits(&mddev->sb_flags, 0, |
9166 | BIT(MD_SB_CHANGE_PENDING) | BIT(MD_SB_CHANGE_DEVS)); | |
c186b128 | 9167 | |
8876391e BC |
9168 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9169 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
9170 | mddev->delta_disks > 0 && | |
9171 | mddev->pers->finish_reshape && | |
9172 | mddev->pers->size && | |
9173 | mddev->queue) { | |
9174 | mddev_lock_nointr(mddev); | |
9175 | md_set_array_sectors(mddev, mddev->pers->size(mddev, 0, 0)); | |
9176 | mddev_unlock(mddev); | |
2c247c51 CH |
9177 | if (!mddev_is_clustered(mddev)) |
9178 | set_capacity_and_notify(mddev->gendisk, | |
9179 | mddev->array_sectors); | |
8876391e BC |
9180 | } |
9181 | ||
23da422b | 9182 | spin_lock(&mddev->lock); |
c07b70ad N |
9183 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { |
9184 | /* We completed so min/max setting can be forgotten if used. */ | |
9185 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
9186 | mddev->resync_min = 0; | |
9187 | mddev->resync_max = MaxSector; | |
9188 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
9189 | mddev->resync_min = mddev->curr_resync_completed; | |
f7851be7 | 9190 | set_bit(MD_RECOVERY_DONE, &mddev->recovery); |
eac58d08 | 9191 | mddev->curr_resync = MD_RESYNC_NONE; |
23da422b N |
9192 | spin_unlock(&mddev->lock); |
9193 | ||
1da177e4 | 9194 | wake_up(&resync_wait); |
1da177e4 | 9195 | md_wakeup_thread(mddev->thread); |
c6207277 | 9196 | return; |
1da177e4 | 9197 | } |
29269553 | 9198 | EXPORT_SYMBOL_GPL(md_do_sync); |
1da177e4 | 9199 | |
3389d57f YK |
9200 | static bool rdev_removeable(struct md_rdev *rdev) |
9201 | { | |
9202 | /* rdev is not used. */ | |
9203 | if (rdev->raid_disk < 0) | |
9204 | return false; | |
9205 | ||
9206 | /* There are still inflight io, don't remove this rdev. */ | |
9207 | if (atomic_read(&rdev->nr_pending)) | |
9208 | return false; | |
9209 | ||
9210 | /* | |
9211 | * An error occurred but has not yet been acknowledged by the metadata | |
9212 | * handler, don't remove this rdev. | |
9213 | */ | |
9214 | if (test_bit(Blocked, &rdev->flags)) | |
9215 | return false; | |
9216 | ||
9217 | /* Fautly rdev is not used, it's safe to remove it. */ | |
9218 | if (test_bit(Faulty, &rdev->flags)) | |
9219 | return true; | |
9220 | ||
9221 | /* Journal disk can only be removed if it's faulty. */ | |
9222 | if (test_bit(Journal, &rdev->flags)) | |
9223 | return false; | |
9224 | ||
9225 | /* | |
9226 | * 'In_sync' is cleared while 'raid_disk' is valid, which means | |
9227 | * replacement has just become active from pers->spare_active(), and | |
9228 | * then pers->hot_remove_disk() will replace this rdev with replacement. | |
9229 | */ | |
9230 | if (!test_bit(In_sync, &rdev->flags)) | |
9231 | return true; | |
9232 | ||
9233 | return false; | |
9234 | } | |
9235 | ||
b172a070 YK |
9236 | static bool rdev_is_spare(struct md_rdev *rdev) |
9237 | { | |
9238 | return !test_bit(Candidate, &rdev->flags) && rdev->raid_disk >= 0 && | |
9239 | !test_bit(In_sync, &rdev->flags) && | |
9240 | !test_bit(Journal, &rdev->flags) && | |
9241 | !test_bit(Faulty, &rdev->flags); | |
9242 | } | |
9243 | ||
a0ae7e4e YK |
9244 | static bool rdev_addable(struct md_rdev *rdev) |
9245 | { | |
9246 | /* rdev is already used, don't add it again. */ | |
9247 | if (test_bit(Candidate, &rdev->flags) || rdev->raid_disk >= 0 || | |
9248 | test_bit(Faulty, &rdev->flags)) | |
9249 | return false; | |
9250 | ||
9251 | /* Allow to add journal disk. */ | |
9252 | if (test_bit(Journal, &rdev->flags)) | |
9253 | return true; | |
9254 | ||
9255 | /* Allow to add if array is read-write. */ | |
9256 | if (md_is_rdwr(rdev->mddev)) | |
9257 | return true; | |
9258 | ||
9259 | /* | |
9260 | * For read-only array, only allow to readd a rdev. And if bitmap is | |
9261 | * used, don't allow to readd a rdev that is too old. | |
9262 | */ | |
9263 | if (rdev->saved_raid_disk >= 0 && !test_bit(Bitmap_sync, &rdev->flags)) | |
9264 | return true; | |
9265 | ||
9266 | return false; | |
9267 | } | |
9268 | ||
81e2ce1b YK |
9269 | static bool md_spares_need_change(struct mddev *mddev) |
9270 | { | |
9271 | struct md_rdev *rdev; | |
9272 | ||
9273 | rdev_for_each(rdev, mddev) | |
9274 | if (rdev_removeable(rdev) || rdev_addable(rdev)) | |
9275 | return true; | |
9276 | return false; | |
9277 | } | |
9278 | ||
746d3207 N |
9279 | static int remove_and_add_spares(struct mddev *mddev, |
9280 | struct md_rdev *this) | |
b4c4c7b8 | 9281 | { |
3cb03002 | 9282 | struct md_rdev *rdev; |
b4c4c7b8 | 9283 | int spares = 0; |
f2a371c5 | 9284 | int removed = 0; |
b4c4c7b8 | 9285 | |
39772f0a N |
9286 | if (this && test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
9287 | /* Mustn't remove devices when resync thread is running */ | |
9288 | return 0; | |
9289 | ||
d787be40 | 9290 | rdev_for_each(rdev, mddev) { |
c891f1fd YK |
9291 | if ((this == NULL || rdev == this) && rdev_removeable(rdev) && |
9292 | !mddev->pers->hot_remove_disk(mddev, rdev)) { | |
9293 | sysfs_unlink_rdev(mddev, rdev); | |
9294 | rdev->saved_raid_disk = rdev->raid_disk; | |
9295 | rdev->raid_disk = -1; | |
9296 | removed++; | |
b4c4c7b8 | 9297 | } |
d787be40 N |
9298 | } |
9299 | ||
90584fc9 | 9300 | if (removed && mddev->kobj.sd) |
e1a86dbb | 9301 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
b4c4c7b8 | 9302 | |
2910ff17 | 9303 | if (this && removed) |
746d3207 N |
9304 | goto no_add; |
9305 | ||
dafb20fa | 9306 | rdev_for_each(rdev, mddev) { |
2910ff17 GR |
9307 | if (this && this != rdev) |
9308 | continue; | |
b172a070 | 9309 | if (rdev_is_spare(rdev)) |
7bfec5f3 | 9310 | spares++; |
a0ae7e4e | 9311 | if (!rdev_addable(rdev)) |
7ceb17e8 | 9312 | continue; |
a0ae7e4e | 9313 | if (!test_bit(Journal, &rdev->flags)) |
f6b6ec5c | 9314 | rdev->recovery_offset = 0; |
3f79cc22 | 9315 | if (mddev->pers->hot_add_disk(mddev, rdev) == 0) { |
5e3b8a8d DLM |
9316 | /* failure here is OK */ |
9317 | sysfs_link_rdev(mddev, rdev); | |
f6b6ec5c SL |
9318 | if (!test_bit(Journal, &rdev->flags)) |
9319 | spares++; | |
54679486 | 9320 | md_new_event(); |
2953079c | 9321 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
dfc70645 | 9322 | } |
b4c4c7b8 | 9323 | } |
746d3207 | 9324 | no_add: |
6dafab6b | 9325 | if (removed) |
2953079c | 9326 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
b4c4c7b8 N |
9327 | return spares; |
9328 | } | |
7ebc0be7 | 9329 | |
897c62a1 YK |
9330 | static bool md_choose_sync_action(struct mddev *mddev, int *spares) |
9331 | { | |
9332 | /* Check if reshape is in progress first. */ | |
9333 | if (mddev->reshape_position != MaxSector) { | |
9334 | if (mddev->pers->check_reshape == NULL || | |
9335 | mddev->pers->check_reshape(mddev) != 0) | |
9336 | return false; | |
9337 | ||
9338 | set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9339 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
9340 | return true; | |
9341 | } | |
9342 | ||
9343 | /* | |
9344 | * Remove any failed drives, then add spares if possible. Spares are | |
9345 | * also removed and re-added, to allow the personality to fail the | |
9346 | * re-add. | |
9347 | */ | |
9348 | *spares = remove_and_add_spares(mddev, NULL); | |
9349 | if (*spares) { | |
9350 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
9351 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
9352 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9353 | ||
9354 | /* Start new recovery. */ | |
9355 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
9356 | return true; | |
9357 | } | |
9358 | ||
9359 | /* Check if recovery is in progress. */ | |
9360 | if (mddev->recovery_cp < MaxSector) { | |
9361 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
9362 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
9363 | return true; | |
9364 | } | |
9365 | ||
9366 | /* Delay to choose resync/check/repair in md_do_sync(). */ | |
9367 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) | |
9368 | return true; | |
9369 | ||
9370 | /* Nothing to be done */ | |
9371 | return false; | |
9372 | } | |
9373 | ||
ac05f256 N |
9374 | static void md_start_sync(struct work_struct *ws) |
9375 | { | |
ac619781 | 9376 | struct mddev *mddev = container_of(ws, struct mddev, sync_work); |
db5e653d | 9377 | int spares = 0; |
bc08041b | 9378 | bool suspend = false; |
ad39c081 | 9379 | char *name; |
db5e653d | 9380 | |
9e46c70e YK |
9381 | /* |
9382 | * If reshape is still in progress, spares won't be added or removed | |
9383 | * from conf until reshape is done. | |
9384 | */ | |
9385 | if (mddev->reshape_position == MaxSector && | |
9386 | md_spares_need_change(mddev)) { | |
bc08041b | 9387 | suspend = true; |
9e46c70e YK |
9388 | mddev_suspend(mddev, false); |
9389 | } | |
bc08041b | 9390 | |
9e46c70e | 9391 | mddev_lock_nointr(mddev); |
81e2ce1b YK |
9392 | if (!md_is_rdwr(mddev)) { |
9393 | /* | |
9394 | * On a read-only array we can: | |
9395 | * - remove failed devices | |
9396 | * - add already-in_sync devices if the array itself is in-sync. | |
9397 | * As we only add devices that are already in-sync, we can | |
9398 | * activate the spares immediately. | |
9399 | */ | |
9400 | remove_and_add_spares(mddev, NULL); | |
9401 | goto not_running; | |
9402 | } | |
9403 | ||
db5e653d YK |
9404 | if (!md_choose_sync_action(mddev, &spares)) |
9405 | goto not_running; | |
9406 | ||
9407 | if (!mddev->pers->sync_request) | |
9408 | goto not_running; | |
9409 | ||
9410 | /* | |
9411 | * We are adding a device or devices to an array which has the bitmap | |
9412 | * stored on all devices. So make sure all bitmap pages get written. | |
9413 | */ | |
9414 | if (spares) | |
9415 | md_bitmap_write_all(mddev->bitmap); | |
c186b128 | 9416 | |
ad39c081 YK |
9417 | name = test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) ? |
9418 | "reshape" : "resync"; | |
44693154 | 9419 | rcu_assign_pointer(mddev->sync_thread, |
ad39c081 | 9420 | md_register_thread(md_do_sync, mddev, name)); |
ac05f256 | 9421 | if (!mddev->sync_thread) { |
9d48739e N |
9422 | pr_warn("%s: could not start resync thread...\n", |
9423 | mdname(mddev)); | |
ac05f256 | 9424 | /* leave the spares where they are, it shouldn't hurt */ |
db5e653d YK |
9425 | goto not_running; |
9426 | } | |
9427 | ||
b3911334 YK |
9428 | mddev_unlock(mddev); |
9429 | /* | |
9430 | * md_start_sync was triggered by MD_RECOVERY_NEEDED, so we should | |
9431 | * not set it again. Otherwise, we may cause issue like this one: | |
9432 | * https://bugzilla.kernel.org/show_bug.cgi?id=218200 | |
9433 | * Therefore, use __mddev_resume(mddev, false). | |
9434 | */ | |
9435 | if (suspend) | |
9436 | __mddev_resume(mddev, false); | |
db5e653d | 9437 | md_wakeup_thread(mddev->sync_thread); |
ac05f256 | 9438 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
54679486 | 9439 | md_new_event(); |
db5e653d YK |
9440 | return; |
9441 | ||
9442 | not_running: | |
9443 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
9444 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9445 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9446 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
9447 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
b3911334 YK |
9448 | mddev_unlock(mddev); |
9449 | /* | |
9450 | * md_start_sync was triggered by MD_RECOVERY_NEEDED, so we should | |
9451 | * not set it again. Otherwise, we may cause issue like this one: | |
9452 | * https://bugzilla.kernel.org/show_bug.cgi?id=218200 | |
9453 | * Therefore, use __mddev_resume(mddev, false). | |
9454 | */ | |
9455 | if (suspend) | |
9456 | __mddev_resume(mddev, false); | |
db5e653d YK |
9457 | |
9458 | wake_up(&resync_wait); | |
9459 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery) && | |
9460 | mddev->sysfs_action) | |
9461 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
ac05f256 N |
9462 | } |
9463 | ||
55a48ad2 YK |
9464 | static void unregister_sync_thread(struct mddev *mddev) |
9465 | { | |
9466 | if (!test_bit(MD_RECOVERY_DONE, &mddev->recovery)) { | |
9467 | /* resync/recovery still happening */ | |
9468 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9469 | return; | |
9470 | } | |
9471 | ||
9472 | if (WARN_ON_ONCE(!mddev->sync_thread)) | |
9473 | return; | |
9474 | ||
9475 | md_reap_sync_thread(mddev); | |
9476 | } | |
9477 | ||
1da177e4 LT |
9478 | /* |
9479 | * This routine is regularly called by all per-raid-array threads to | |
9480 | * deal with generic issues like resync and super-block update. | |
9481 | * Raid personalities that don't have a thread (linear/raid0) do not | |
9482 | * need this as they never do any recovery or update the superblock. | |
9483 | * | |
9484 | * It does not do any resync itself, but rather "forks" off other threads | |
9485 | * to do that as needed. | |
9486 | * When it is determined that resync is needed, we set MD_RECOVERY_RUNNING in | |
9487 | * "->recovery" and create a thread at ->sync_thread. | |
dfc70645 | 9488 | * When the thread finishes it sets MD_RECOVERY_DONE |
1da177e4 LT |
9489 | * and wakeups up this thread which will reap the thread and finish up. |
9490 | * This thread also removes any faulty devices (with nr_pending == 0). | |
9491 | * | |
9492 | * The overall approach is: | |
9493 | * 1/ if the superblock needs updating, update it. | |
9494 | * 2/ If a recovery thread is running, don't do anything else. | |
9495 | * 3/ If recovery has finished, clean up, possibly marking spares active. | |
9496 | * 4/ If there are any faulty devices, remove them. | |
9497 | * 5/ If array is degraded, try to add spares devices | |
9498 | * 6/ If array has spares or is not in-sync, start a resync thread. | |
9499 | */ | |
fd01b88c | 9500 | void md_check_recovery(struct mddev *mddev) |
1da177e4 | 9501 | { |
5f40402d | 9502 | if (mddev->bitmap) |
e64e4018 | 9503 | md_bitmap_daemon_work(mddev); |
1da177e4 | 9504 | |
fca4d848 | 9505 | if (signal_pending(current)) { |
31a59e34 | 9506 | if (mddev->pers->sync_request && !mddev->external) { |
9d48739e N |
9507 | pr_debug("md: %s in immediate safe mode\n", |
9508 | mdname(mddev)); | |
fca4d848 N |
9509 | mddev->safemode = 2; |
9510 | } | |
9511 | flush_signals(current); | |
9512 | } | |
9513 | ||
f97a5528 | 9514 | if (!md_is_rdwr(mddev) && |
55a48ad2 YK |
9515 | !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) && |
9516 | !test_bit(MD_RECOVERY_DONE, &mddev->recovery)) | |
c89a8eee | 9517 | return; |
1da177e4 | 9518 | if ( ! ( |
2953079c | 9519 | (mddev->sb_flags & ~ (1<<MD_SB_CHANGE_PENDING)) || |
1da177e4 | 9520 | test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
fca4d848 | 9521 | test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
31a59e34 | 9522 | (mddev->external == 0 && mddev->safemode == 1) || |
4ad23a97 | 9523 | (mddev->safemode == 2 |
fca4d848 | 9524 | && !mddev->in_sync && mddev->recovery_cp == MaxSector) |
1da177e4 LT |
9525 | )) |
9526 | return; | |
fca4d848 | 9527 | |
df5b89b3 | 9528 | if (mddev_trylock(mddev)) { |
480523fe | 9529 | bool try_set_sync = mddev->safemode != 0; |
fca4d848 | 9530 | |
afc1f55c | 9531 | if (!mddev->external && mddev->safemode == 1) |
33182d15 N |
9532 | mddev->safemode = 0; |
9533 | ||
f97a5528 | 9534 | if (!md_is_rdwr(mddev)) { |
ab16bfc7 | 9535 | struct md_rdev *rdev; |
81e2ce1b YK |
9536 | |
9537 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { | |
55a48ad2 | 9538 | unregister_sync_thread(mddev); |
81e2ce1b YK |
9539 | goto unlock; |
9540 | } | |
9541 | ||
ab16bfc7 | 9542 | if (!mddev->external && mddev->in_sync) |
81e2ce1b YK |
9543 | /* |
9544 | * 'Blocked' flag not needed as failed devices | |
ab16bfc7 NB |
9545 | * will be recorded if array switched to read/write. |
9546 | * Leaving it set will prevent the device | |
9547 | * from being removed. | |
9548 | */ | |
9549 | rdev_for_each(rdev, mddev) | |
9550 | clear_bit(Blocked, &rdev->flags); | |
81e2ce1b YK |
9551 | |
9552 | /* | |
9553 | * There is no thread, but we need to call | |
8313b8e5 N |
9554 | * ->spare_active and clear saved_raid_disk |
9555 | */ | |
2ac295a5 | 9556 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
d0a18034 | 9557 | md_reap_sync_thread(mddev); |
81e2ce1b YK |
9558 | |
9559 | /* | |
9560 | * Let md_start_sync() to remove and add rdevs to the | |
9561 | * array. | |
9562 | */ | |
9563 | if (md_spares_need_change(mddev)) { | |
9564 | set_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
9565 | queue_work(md_misc_wq, &mddev->sync_work); | |
9566 | } | |
9567 | ||
a4a3d26d | 9568 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
8313b8e5 | 9569 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
2953079c | 9570 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
81e2ce1b | 9571 | |
c89a8eee N |
9572 | goto unlock; |
9573 | } | |
9574 | ||
659b254f | 9575 | if (mddev_is_clustered(mddev)) { |
f7c7a2f9 | 9576 | struct md_rdev *rdev, *tmp; |
659b254f GJ |
9577 | /* kick the device if another node issued a |
9578 | * remove disk. | |
9579 | */ | |
f7c7a2f9 | 9580 | rdev_for_each_safe(rdev, tmp, mddev) { |
659b254f GJ |
9581 | if (test_and_clear_bit(ClusterRemove, &rdev->flags) && |
9582 | rdev->raid_disk < 0) | |
9583 | md_kick_rdev_from_array(rdev); | |
9584 | } | |
9585 | } | |
9586 | ||
480523fe | 9587 | if (try_set_sync && !mddev->external && !mddev->in_sync) { |
85572d7c | 9588 | spin_lock(&mddev->lock); |
6497709b | 9589 | set_in_sync(mddev); |
85572d7c | 9590 | spin_unlock(&mddev->lock); |
fca4d848 | 9591 | } |
fca4d848 | 9592 | |
2953079c | 9593 | if (mddev->sb_flags) |
850b2b42 | 9594 | md_update_sb(mddev, 0); |
06d91a5f | 9595 | |
f71209b1 YK |
9596 | /* |
9597 | * Never start a new sync thread if MD_RECOVERY_RUNNING is | |
9598 | * still set. | |
9599 | */ | |
9600 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { | |
55a48ad2 | 9601 | unregister_sync_thread(mddev); |
1da177e4 LT |
9602 | goto unlock; |
9603 | } | |
f71209b1 | 9604 | |
72a23c21 NB |
9605 | /* Set RUNNING before clearing NEEDED to avoid |
9606 | * any transients in the value of "sync_action". | |
9607 | */ | |
72f36d59 | 9608 | mddev->curr_resync_completed = 0; |
23da422b | 9609 | spin_lock(&mddev->lock); |
72a23c21 | 9610 | set_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
23da422b | 9611 | spin_unlock(&mddev->lock); |
24dd469d N |
9612 | /* Clear some bits that don't mean anything, but |
9613 | * might be left set | |
9614 | */ | |
24dd469d N |
9615 | clear_bit(MD_RECOVERY_INTR, &mddev->recovery); |
9616 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); | |
1da177e4 | 9617 | |
db5e653d YK |
9618 | if (test_and_clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery) && |
9619 | !test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
ac619781 | 9620 | queue_work(md_misc_wq, &mddev->sync_work); |
db5e653d | 9621 | } else { |
72a23c21 | 9622 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
f851b60d | 9623 | wake_up(&resync_wait); |
72a23c21 | 9624 | } |
db5e653d | 9625 | |
ac05f256 N |
9626 | unlock: |
9627 | wake_up(&mddev->sb_wait); | |
1da177e4 LT |
9628 | mddev_unlock(mddev); |
9629 | } | |
9630 | } | |
6c144d31 | 9631 | EXPORT_SYMBOL(md_check_recovery); |
1da177e4 | 9632 | |
d0a18034 | 9633 | void md_reap_sync_thread(struct mddev *mddev) |
a91d5ac0 JB |
9634 | { |
9635 | struct md_rdev *rdev; | |
aefb2e5f GJ |
9636 | sector_t old_dev_sectors = mddev->dev_sectors; |
9637 | bool is_reshaped = false; | |
a91d5ac0 | 9638 | |
a865b96c | 9639 | /* resync has finished, collect result */ |
7eb8ff02 | 9640 | md_unregister_thread(mddev, &mddev->sync_thread); |
130443d6 YK |
9641 | atomic_inc(&mddev->sync_seq); |
9642 | ||
a91d5ac0 | 9643 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
0d8ed0e9 GJ |
9644 | !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery) && |
9645 | mddev->degraded != mddev->raid_disks) { | |
a91d5ac0 JB |
9646 | /* success...*/ |
9647 | /* activate any spares */ | |
9648 | if (mddev->pers->spare_active(mddev)) { | |
e1a86dbb | 9649 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
2953079c | 9650 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a91d5ac0 JB |
9651 | } |
9652 | } | |
9653 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
aefb2e5f | 9654 | mddev->pers->finish_reshape) { |
a91d5ac0 | 9655 | mddev->pers->finish_reshape(mddev); |
aefb2e5f GJ |
9656 | if (mddev_is_clustered(mddev)) |
9657 | is_reshaped = true; | |
9658 | } | |
a91d5ac0 JB |
9659 | |
9660 | /* If array is no-longer degraded, then any saved_raid_disk | |
f466722c | 9661 | * information must be scrapped. |
a91d5ac0 | 9662 | */ |
f466722c N |
9663 | if (!mddev->degraded) |
9664 | rdev_for_each(rdev, mddev) | |
a91d5ac0 JB |
9665 | rdev->saved_raid_disk = -1; |
9666 | ||
9667 | md_update_sb(mddev, 1); | |
2953079c | 9668 | /* MD_SB_CHANGE_PENDING should be cleared by md_update_sb, so we can |
bb8bf15b GJ |
9669 | * call resync_finish here if MD_CLUSTER_RESYNC_LOCKED is set by |
9670 | * clustered raid */ | |
9671 | if (test_and_clear_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags)) | |
9672 | md_cluster_ops->resync_finish(mddev); | |
a91d5ac0 | 9673 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
ea358cd0 | 9674 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); |
a91d5ac0 JB |
9675 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9676 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9677 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9678 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
aefb2e5f GJ |
9679 | /* |
9680 | * We call md_cluster_ops->update_size here because sync_size could | |
9681 | * be changed by md_update_sb, and MD_RECOVERY_RESHAPE is cleared, | |
9682 | * so it is time to update size across cluster. | |
9683 | */ | |
9684 | if (mddev_is_clustered(mddev) && is_reshaped | |
9685 | && !test_bit(MD_CLOSING, &mddev->flags)) | |
9686 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
a91d5ac0 JB |
9687 | /* flag recovery needed just to double check */ |
9688 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9973f0fa | 9689 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
a91d5ac0 | 9690 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
54679486 | 9691 | md_new_event(); |
a91d5ac0 JB |
9692 | if (mddev->event_work.func) |
9693 | queue_work(md_misc_wq, &mddev->event_work); | |
753260ed | 9694 | wake_up(&resync_wait); |
a91d5ac0 | 9695 | } |
6c144d31 | 9696 | EXPORT_SYMBOL(md_reap_sync_thread); |
a91d5ac0 | 9697 | |
fd01b88c | 9698 | void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev) |
6bfe0b49 | 9699 | { |
00bcb4ac | 9700 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
6bfe0b49 | 9701 | wait_event_timeout(rdev->blocked_wait, |
de393cde N |
9702 | !test_bit(Blocked, &rdev->flags) && |
9703 | !test_bit(BlockedBadBlocks, &rdev->flags), | |
6bfe0b49 DW |
9704 | msecs_to_jiffies(5000)); |
9705 | rdev_dec_pending(rdev, mddev); | |
9706 | } | |
9707 | EXPORT_SYMBOL(md_wait_for_blocked_rdev); | |
9708 | ||
c6563a8c N |
9709 | void md_finish_reshape(struct mddev *mddev) |
9710 | { | |
9711 | /* called be personality module when reshape completes. */ | |
9712 | struct md_rdev *rdev; | |
9713 | ||
9714 | rdev_for_each(rdev, mddev) { | |
9715 | if (rdev->data_offset > rdev->new_data_offset) | |
9716 | rdev->sectors += rdev->data_offset - rdev->new_data_offset; | |
9717 | else | |
9718 | rdev->sectors -= rdev->new_data_offset - rdev->data_offset; | |
9719 | rdev->data_offset = rdev->new_data_offset; | |
9720 | } | |
9721 | } | |
9722 | EXPORT_SYMBOL(md_finish_reshape); | |
2230dfe4 | 9723 | |
fc974ee2 | 9724 | /* Bad block management */ |
2230dfe4 | 9725 | |
fc974ee2 | 9726 | /* Returns 1 on success, 0 on failure */ |
3cb03002 | 9727 | int rdev_set_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
c6563a8c | 9728 | int is_new) |
2230dfe4 | 9729 | { |
85ad1d13 | 9730 | struct mddev *mddev = rdev->mddev; |
c6563a8c N |
9731 | int rv; |
9732 | if (is_new) | |
9733 | s += rdev->new_data_offset; | |
9734 | else | |
9735 | s += rdev->data_offset; | |
fc974ee2 VV |
9736 | rv = badblocks_set(&rdev->badblocks, s, sectors, 0); |
9737 | if (rv == 0) { | |
2230dfe4 | 9738 | /* Make sure they get written out promptly */ |
35b785f7 | 9739 | if (test_bit(ExternalBbl, &rdev->flags)) |
e1a86dbb | 9740 | sysfs_notify_dirent_safe(rdev->sysfs_unack_badblocks); |
8bd2f0a0 | 9741 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
2953079c SL |
9742 | set_mask_bits(&mddev->sb_flags, 0, |
9743 | BIT(MD_SB_CHANGE_CLEAN) | BIT(MD_SB_CHANGE_PENDING)); | |
2230dfe4 | 9744 | md_wakeup_thread(rdev->mddev->thread); |
fc974ee2 VV |
9745 | return 1; |
9746 | } else | |
9747 | return 0; | |
2230dfe4 N |
9748 | } |
9749 | EXPORT_SYMBOL_GPL(rdev_set_badblocks); | |
9750 | ||
c6563a8c N |
9751 | int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
9752 | int is_new) | |
2230dfe4 | 9753 | { |
35b785f7 | 9754 | int rv; |
c6563a8c N |
9755 | if (is_new) |
9756 | s += rdev->new_data_offset; | |
9757 | else | |
9758 | s += rdev->data_offset; | |
35b785f7 TM |
9759 | rv = badblocks_clear(&rdev->badblocks, s, sectors); |
9760 | if ((rv == 0) && test_bit(ExternalBbl, &rdev->flags)) | |
e1a86dbb | 9761 | sysfs_notify_dirent_safe(rdev->sysfs_badblocks); |
35b785f7 | 9762 | return rv; |
2230dfe4 N |
9763 | } |
9764 | EXPORT_SYMBOL_GPL(rdev_clear_badblocks); | |
9765 | ||
75c96f85 AB |
9766 | static int md_notify_reboot(struct notifier_block *this, |
9767 | unsigned long code, void *x) | |
1da177e4 | 9768 | { |
f2651434 | 9769 | struct mddev *mddev, *n; |
2dba6a91 | 9770 | int need_delay = 0; |
1da177e4 | 9771 | |
f2651434 CH |
9772 | spin_lock(&all_mddevs_lock); |
9773 | list_for_each_entry_safe(mddev, n, &all_mddevs, all_mddevs) { | |
12a6caf2 CH |
9774 | if (!mddev_get(mddev)) |
9775 | continue; | |
f2651434 | 9776 | spin_unlock(&all_mddevs_lock); |
c744a65c | 9777 | if (mddev_trylock(mddev)) { |
30b8aa91 N |
9778 | if (mddev->pers) |
9779 | __md_stop_writes(mddev); | |
0f62fb22 N |
9780 | if (mddev->persistent) |
9781 | mddev->safemode = 2; | |
c744a65c | 9782 | mddev_unlock(mddev); |
2dba6a91 | 9783 | } |
c744a65c | 9784 | need_delay = 1; |
f2651434 CH |
9785 | mddev_put(mddev); |
9786 | spin_lock(&all_mddevs_lock); | |
1da177e4 | 9787 | } |
f2651434 CH |
9788 | spin_unlock(&all_mddevs_lock); |
9789 | ||
c744a65c N |
9790 | /* |
9791 | * certain more exotic SCSI devices are known to be | |
9792 | * volatile wrt too early system reboots. While the | |
9793 | * right place to handle this issue is the given | |
9794 | * driver, we do want to have a safe RAID driver ... | |
9795 | */ | |
9796 | if (need_delay) | |
7d959f6e | 9797 | msleep(1000); |
c744a65c | 9798 | |
1da177e4 LT |
9799 | return NOTIFY_DONE; |
9800 | } | |
9801 | ||
75c96f85 | 9802 | static struct notifier_block md_notifier = { |
1da177e4 LT |
9803 | .notifier_call = md_notify_reboot, |
9804 | .next = NULL, | |
9805 | .priority = INT_MAX, /* before any real devices */ | |
9806 | }; | |
9807 | ||
9808 | static void md_geninit(void) | |
9809 | { | |
36a4e1fe | 9810 | pr_debug("md: sizeof(mdp_super_t) = %d\n", (int)sizeof(mdp_super_t)); |
1da177e4 | 9811 | |
97a32539 | 9812 | proc_create("mdstat", S_IRUGO, NULL, &mdstat_proc_ops); |
1da177e4 LT |
9813 | } |
9814 | ||
75c96f85 | 9815 | static int __init md_init(void) |
1da177e4 | 9816 | { |
e804ac78 TH |
9817 | int ret = -ENOMEM; |
9818 | ||
ada609ee | 9819 | md_wq = alloc_workqueue("md", WQ_MEM_RECLAIM, 0); |
e804ac78 TH |
9820 | if (!md_wq) |
9821 | goto err_wq; | |
9822 | ||
9823 | md_misc_wq = alloc_workqueue("md_misc", 0, 0); | |
9824 | if (!md_misc_wq) | |
9825 | goto err_misc_wq; | |
9826 | ||
a022325a YK |
9827 | md_bitmap_wq = alloc_workqueue("md_bitmap", WQ_MEM_RECLAIM | WQ_UNBOUND, |
9828 | 0); | |
9829 | if (!md_bitmap_wq) | |
9830 | goto err_bitmap_wq; | |
9831 | ||
28144f99 CH |
9832 | ret = __register_blkdev(MD_MAJOR, "md", md_probe); |
9833 | if (ret < 0) | |
e804ac78 TH |
9834 | goto err_md; |
9835 | ||
28144f99 CH |
9836 | ret = __register_blkdev(0, "mdp", md_probe); |
9837 | if (ret < 0) | |
e804ac78 TH |
9838 | goto err_mdp; |
9839 | mdp_major = ret; | |
9840 | ||
1da177e4 | 9841 | register_reboot_notifier(&md_notifier); |
9adcf9d3 | 9842 | raid_table_header = register_sysctl("dev/raid", raid_table); |
1da177e4 LT |
9843 | |
9844 | md_geninit(); | |
d710e138 | 9845 | return 0; |
1da177e4 | 9846 | |
e804ac78 TH |
9847 | err_mdp: |
9848 | unregister_blkdev(MD_MAJOR, "md"); | |
9849 | err_md: | |
a022325a YK |
9850 | destroy_workqueue(md_bitmap_wq); |
9851 | err_bitmap_wq: | |
e804ac78 TH |
9852 | destroy_workqueue(md_misc_wq); |
9853 | err_misc_wq: | |
9854 | destroy_workqueue(md_wq); | |
9855 | err_wq: | |
9856 | return ret; | |
9857 | } | |
1da177e4 | 9858 | |
70bcecdb | 9859 | static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev) |
1d7e3e96 | 9860 | { |
70bcecdb | 9861 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
f7c7a2f9 | 9862 | struct md_rdev *rdev2, *tmp; |
70bcecdb | 9863 | int role, ret; |
1d7e3e96 | 9864 | |
818da59f GJ |
9865 | /* |
9866 | * If size is changed in another node then we need to | |
9867 | * do resize as well. | |
9868 | */ | |
9869 | if (mddev->dev_sectors != le64_to_cpu(sb->size)) { | |
9870 | ret = mddev->pers->resize(mddev, le64_to_cpu(sb->size)); | |
9871 | if (ret) | |
9872 | pr_info("md-cluster: resize failed\n"); | |
9873 | else | |
e64e4018 | 9874 | md_bitmap_update_sb(mddev->bitmap); |
818da59f GJ |
9875 | } |
9876 | ||
70bcecdb | 9877 | /* Check for change of roles in the active devices */ |
f7c7a2f9 | 9878 | rdev_for_each_safe(rdev2, tmp, mddev) { |
70bcecdb GR |
9879 | if (test_bit(Faulty, &rdev2->flags)) |
9880 | continue; | |
9881 | ||
9882 | /* Check if the roles changed */ | |
9883 | role = le16_to_cpu(sb->dev_roles[rdev2->desc_nr]); | |
dbb64f86 GR |
9884 | |
9885 | if (test_bit(Candidate, &rdev2->flags)) { | |
9151ad5d | 9886 | if (role == MD_DISK_ROLE_FAULTY) { |
913cce5a CH |
9887 | pr_info("md: Removing Candidate device %pg because add failed\n", |
9888 | rdev2->bdev); | |
dbb64f86 GR |
9889 | md_kick_rdev_from_array(rdev2); |
9890 | continue; | |
9891 | } | |
9892 | else | |
9893 | clear_bit(Candidate, &rdev2->flags); | |
9894 | } | |
9895 | ||
70bcecdb | 9896 | if (role != rdev2->raid_disk) { |
ca1e98e0 GJ |
9897 | /* |
9898 | * got activated except reshape is happening. | |
9899 | */ | |
9151ad5d | 9900 | if (rdev2->raid_disk == -1 && role != MD_DISK_ROLE_SPARE && |
ca1e98e0 GJ |
9901 | !(le32_to_cpu(sb->feature_map) & |
9902 | MD_FEATURE_RESHAPE_ACTIVE)) { | |
70bcecdb GR |
9903 | rdev2->saved_raid_disk = role; |
9904 | ret = remove_and_add_spares(mddev, rdev2); | |
913cce5a CH |
9905 | pr_info("Activated spare: %pg\n", |
9906 | rdev2->bdev); | |
a578183e GJ |
9907 | /* wakeup mddev->thread here, so array could |
9908 | * perform resync with the new activated disk */ | |
9909 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9910 | md_wakeup_thread(mddev->thread); | |
70bcecdb GR |
9911 | } |
9912 | /* device faulty | |
9913 | * We just want to do the minimum to mark the disk | |
9914 | * as faulty. The recovery is performed by the | |
9915 | * one who initiated the error. | |
9916 | */ | |
9151ad5d DS |
9917 | if (role == MD_DISK_ROLE_FAULTY || |
9918 | role == MD_DISK_ROLE_JOURNAL) { | |
70bcecdb GR |
9919 | md_error(mddev, rdev2); |
9920 | clear_bit(Blocked, &rdev2->flags); | |
9921 | } | |
9922 | } | |
1d7e3e96 | 9923 | } |
70bcecdb | 9924 | |
a8da01f7 ZH |
9925 | if (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) { |
9926 | ret = update_raid_disks(mddev, le32_to_cpu(sb->raid_disks)); | |
9927 | if (ret) | |
9928 | pr_warn("md: updating array disks failed. %d\n", ret); | |
9929 | } | |
70bcecdb | 9930 | |
7564beda GJ |
9931 | /* |
9932 | * Since mddev->delta_disks has already updated in update_raid_disks, | |
9933 | * so it is time to check reshape. | |
9934 | */ | |
9935 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9936 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9937 | /* | |
9938 | * reshape is happening in the remote node, we need to | |
9939 | * update reshape_position and call start_reshape. | |
9940 | */ | |
ed4d0a4e | 9941 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); |
7564beda GJ |
9942 | if (mddev->pers->update_reshape_pos) |
9943 | mddev->pers->update_reshape_pos(mddev); | |
9944 | if (mddev->pers->start_reshape) | |
9945 | mddev->pers->start_reshape(mddev); | |
9946 | } else if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9947 | mddev->reshape_position != MaxSector && | |
9948 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9949 | /* reshape is just done in another node. */ | |
9950 | mddev->reshape_position = MaxSector; | |
9951 | if (mddev->pers->update_reshape_pos) | |
9952 | mddev->pers->update_reshape_pos(mddev); | |
9953 | } | |
9954 | ||
70bcecdb GR |
9955 | /* Finally set the event to be up to date */ |
9956 | mddev->events = le64_to_cpu(sb->events); | |
9957 | } | |
9958 | ||
9959 | static int read_rdev(struct mddev *mddev, struct md_rdev *rdev) | |
9960 | { | |
9961 | int err; | |
9962 | struct page *swapout = rdev->sb_page; | |
9963 | struct mdp_superblock_1 *sb; | |
9964 | ||
9965 | /* Store the sb page of the rdev in the swapout temporary | |
9966 | * variable in case we err in the future | |
9967 | */ | |
9968 | rdev->sb_page = NULL; | |
7f0f0d87 N |
9969 | err = alloc_disk_sb(rdev); |
9970 | if (err == 0) { | |
9971 | ClearPageUptodate(rdev->sb_page); | |
9972 | rdev->sb_loaded = 0; | |
9973 | err = super_types[mddev->major_version]. | |
9974 | load_super(rdev, NULL, mddev->minor_version); | |
9975 | } | |
70bcecdb GR |
9976 | if (err < 0) { |
9977 | pr_warn("%s: %d Could not reload rdev(%d) err: %d. Restoring old values\n", | |
9978 | __func__, __LINE__, rdev->desc_nr, err); | |
7f0f0d87 N |
9979 | if (rdev->sb_page) |
9980 | put_page(rdev->sb_page); | |
70bcecdb GR |
9981 | rdev->sb_page = swapout; |
9982 | rdev->sb_loaded = 1; | |
9983 | return err; | |
1d7e3e96 GR |
9984 | } |
9985 | ||
70bcecdb GR |
9986 | sb = page_address(rdev->sb_page); |
9987 | /* Read the offset unconditionally, even if MD_FEATURE_RECOVERY_OFFSET | |
9988 | * is not set | |
9989 | */ | |
9990 | ||
9991 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)) | |
9992 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); | |
9993 | ||
9994 | /* The other node finished recovery, call spare_active to set | |
9995 | * device In_sync and mddev->degraded | |
9996 | */ | |
9997 | if (rdev->recovery_offset == MaxSector && | |
9998 | !test_bit(In_sync, &rdev->flags) && | |
9999 | mddev->pers->spare_active(mddev)) | |
e1a86dbb | 10000 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
70bcecdb GR |
10001 | |
10002 | put_page(swapout); | |
10003 | return 0; | |
10004 | } | |
10005 | ||
10006 | void md_reload_sb(struct mddev *mddev, int nr) | |
10007 | { | |
64c54d92 | 10008 | struct md_rdev *rdev = NULL, *iter; |
70bcecdb GR |
10009 | int err; |
10010 | ||
10011 | /* Find the rdev */ | |
64c54d92 XT |
10012 | rdev_for_each_rcu(iter, mddev) { |
10013 | if (iter->desc_nr == nr) { | |
10014 | rdev = iter; | |
70bcecdb | 10015 | break; |
64c54d92 | 10016 | } |
70bcecdb GR |
10017 | } |
10018 | ||
64c54d92 | 10019 | if (!rdev) { |
70bcecdb GR |
10020 | pr_warn("%s: %d Could not find rdev with nr %d\n", __func__, __LINE__, nr); |
10021 | return; | |
10022 | } | |
10023 | ||
10024 | err = read_rdev(mddev, rdev); | |
10025 | if (err < 0) | |
10026 | return; | |
10027 | ||
10028 | check_sb_changes(mddev, rdev); | |
10029 | ||
10030 | /* Read all rdev's to update recovery_offset */ | |
0ea9924a GJ |
10031 | rdev_for_each_rcu(rdev, mddev) { |
10032 | if (!test_bit(Faulty, &rdev->flags)) | |
10033 | read_rdev(mddev, rdev); | |
10034 | } | |
1d7e3e96 GR |
10035 | } |
10036 | EXPORT_SYMBOL(md_reload_sb); | |
10037 | ||
1da177e4 LT |
10038 | #ifndef MODULE |
10039 | ||
10040 | /* | |
10041 | * Searches all registered partitions for autorun RAID arrays | |
10042 | * at boot time. | |
10043 | */ | |
4d936ec1 | 10044 | |
5b1f5bc3 | 10045 | static DEFINE_MUTEX(detected_devices_mutex); |
4d936ec1 ME |
10046 | static LIST_HEAD(all_detected_devices); |
10047 | struct detected_devices_node { | |
10048 | struct list_head list; | |
10049 | dev_t dev; | |
10050 | }; | |
1da177e4 LT |
10051 | |
10052 | void md_autodetect_dev(dev_t dev) | |
10053 | { | |
4d936ec1 ME |
10054 | struct detected_devices_node *node_detected_dev; |
10055 | ||
10056 | node_detected_dev = kzalloc(sizeof(*node_detected_dev), GFP_KERNEL); | |
10057 | if (node_detected_dev) { | |
10058 | node_detected_dev->dev = dev; | |
5b1f5bc3 | 10059 | mutex_lock(&detected_devices_mutex); |
4d936ec1 | 10060 | list_add_tail(&node_detected_dev->list, &all_detected_devices); |
5b1f5bc3 | 10061 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 10062 | } |
1da177e4 LT |
10063 | } |
10064 | ||
d82fa81c | 10065 | void md_autostart_arrays(int part) |
1da177e4 | 10066 | { |
3cb03002 | 10067 | struct md_rdev *rdev; |
4d936ec1 ME |
10068 | struct detected_devices_node *node_detected_dev; |
10069 | dev_t dev; | |
10070 | int i_scanned, i_passed; | |
1da177e4 | 10071 | |
4d936ec1 ME |
10072 | i_scanned = 0; |
10073 | i_passed = 0; | |
1da177e4 | 10074 | |
9d48739e | 10075 | pr_info("md: Autodetecting RAID arrays.\n"); |
1da177e4 | 10076 | |
5b1f5bc3 | 10077 | mutex_lock(&detected_devices_mutex); |
4d936ec1 ME |
10078 | while (!list_empty(&all_detected_devices) && i_scanned < INT_MAX) { |
10079 | i_scanned++; | |
10080 | node_detected_dev = list_entry(all_detected_devices.next, | |
10081 | struct detected_devices_node, list); | |
10082 | list_del(&node_detected_dev->list); | |
10083 | dev = node_detected_dev->dev; | |
10084 | kfree(node_detected_dev); | |
90bcf133 | 10085 | mutex_unlock(&detected_devices_mutex); |
df968c4e | 10086 | rdev = md_import_device(dev,0, 90); |
90bcf133 | 10087 | mutex_lock(&detected_devices_mutex); |
1da177e4 LT |
10088 | if (IS_ERR(rdev)) |
10089 | continue; | |
10090 | ||
403df478 | 10091 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 10092 | continue; |
403df478 | 10093 | |
d0fae18f | 10094 | set_bit(AutoDetected, &rdev->flags); |
1da177e4 | 10095 | list_add(&rdev->same_set, &pending_raid_disks); |
4d936ec1 | 10096 | i_passed++; |
1da177e4 | 10097 | } |
5b1f5bc3 | 10098 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 10099 | |
9d48739e | 10100 | pr_debug("md: Scanned %d and added %d devices.\n", i_scanned, i_passed); |
1da177e4 LT |
10101 | |
10102 | autorun_devices(part); | |
10103 | } | |
10104 | ||
fdee8ae4 | 10105 | #endif /* !MODULE */ |
1da177e4 LT |
10106 | |
10107 | static __exit void md_exit(void) | |
10108 | { | |
16648bac | 10109 | struct mddev *mddev, *n; |
e2f23b60 | 10110 | int delay = 1; |
8ab5e4c1 | 10111 | |
3dbd8c2e | 10112 | unregister_blkdev(MD_MAJOR,"md"); |
1da177e4 LT |
10113 | unregister_blkdev(mdp_major, "mdp"); |
10114 | unregister_reboot_notifier(&md_notifier); | |
10115 | unregister_sysctl_table(raid_table_header); | |
e2f23b60 N |
10116 | |
10117 | /* We cannot unload the modules while some process is | |
10118 | * waiting for us in select() or poll() - wake them up | |
10119 | */ | |
10120 | md_unloading = 1; | |
10121 | while (waitqueue_active(&md_event_waiters)) { | |
10122 | /* not safe to leave yet */ | |
10123 | wake_up(&md_event_waiters); | |
10124 | msleep(delay); | |
10125 | delay += delay; | |
10126 | } | |
1da177e4 | 10127 | remove_proc_entry("mdstat", NULL); |
e2f23b60 | 10128 | |
16648bac CH |
10129 | spin_lock(&all_mddevs_lock); |
10130 | list_for_each_entry_safe(mddev, n, &all_mddevs, all_mddevs) { | |
12a6caf2 CH |
10131 | if (!mddev_get(mddev)) |
10132 | continue; | |
16648bac | 10133 | spin_unlock(&all_mddevs_lock); |
1da177e4 | 10134 | export_array(mddev); |
9356863c | 10135 | mddev->ctime = 0; |
d3374825 | 10136 | mddev->hold_active = 0; |
9356863c | 10137 | /* |
16648bac CH |
10138 | * As the mddev is now fully clear, mddev_put will schedule |
10139 | * the mddev for destruction by a workqueue, and the | |
9356863c N |
10140 | * destroy_workqueue() below will wait for that to complete. |
10141 | */ | |
16648bac CH |
10142 | mddev_put(mddev); |
10143 | spin_lock(&all_mddevs_lock); | |
1da177e4 | 10144 | } |
16648bac CH |
10145 | spin_unlock(&all_mddevs_lock); |
10146 | ||
e804ac78 | 10147 | destroy_workqueue(md_misc_wq); |
a022325a | 10148 | destroy_workqueue(md_bitmap_wq); |
e804ac78 | 10149 | destroy_workqueue(md_wq); |
1da177e4 LT |
10150 | } |
10151 | ||
685784aa | 10152 | subsys_initcall(md_init); |
1da177e4 LT |
10153 | module_exit(md_exit) |
10154 | ||
e4dca7b7 | 10155 | static int get_ro(char *buffer, const struct kernel_param *kp) |
f91de92e | 10156 | { |
3f99980c | 10157 | return sprintf(buffer, "%d\n", start_readonly); |
f91de92e | 10158 | } |
e4dca7b7 | 10159 | static int set_ro(const char *val, const struct kernel_param *kp) |
f91de92e | 10160 | { |
4c9309c0 | 10161 | return kstrtouint(val, 10, (unsigned int *)&start_readonly); |
f91de92e N |
10162 | } |
10163 | ||
80ca3a44 N |
10164 | module_param_call(start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR); |
10165 | module_param(start_dirty_degraded, int, S_IRUGO|S_IWUSR); | |
efeb53c0 | 10166 | module_param_call(new_array, add_named_array, NULL, NULL, S_IWUSR); |
78b6350d | 10167 | module_param(create_on_open, bool, S_IRUSR|S_IWUSR); |
f91de92e | 10168 | |
1da177e4 | 10169 | MODULE_LICENSE("GPL"); |
0efb9e61 | 10170 | MODULE_DESCRIPTION("MD RAID framework"); |
aa1595e9 | 10171 | MODULE_ALIAS("md"); |
72008652 | 10172 | MODULE_ALIAS_BLOCKDEV_MAJOR(MD_MAJOR); |