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 TH |
84 | static struct workqueue_struct *md_wq; |
85 | static struct workqueue_struct *md_misc_wq; | |
a022325a | 86 | struct workqueue_struct *md_bitmap_wq; |
90b08710 | 87 | |
746d3207 N |
88 | static int remove_and_add_spares(struct mddev *mddev, |
89 | struct md_rdev *this); | |
5aa61f42 | 90 | static void mddev_detach(struct mddev *mddev); |
3ce94ce5 | 91 | static void export_rdev(struct md_rdev *rdev, struct mddev *mddev); |
44693154 | 92 | static void md_wakeup_thread_directly(struct md_thread __rcu *thread); |
746d3207 | 93 | |
1e50915f RB |
94 | /* |
95 | * Default number of read corrections we'll attempt on an rdev | |
96 | * before ejecting it from the array. We divide the read error | |
97 | * count by 2 for every hour elapsed between read errors. | |
98 | */ | |
99 | #define MD_DEFAULT_MAX_CORRECTED_READ_ERRORS 20 | |
7c9d5c54 ZH |
100 | /* Default safemode delay: 200 msec */ |
101 | #define DEFAULT_SAFEMODE_DELAY ((200 * HZ)/1000 +1) | |
1da177e4 LT |
102 | /* |
103 | * Current RAID-1,4,5 parallel reconstruction 'guaranteed speed limit' | |
104 | * is 1000 KB/sec, so the extra system load does not show up that much. | |
105 | * Increase it if you want to have more _guaranteed_ speed. Note that | |
338cec32 | 106 | * the RAID driver will use the maximum available bandwidth if the IO |
1da177e4 LT |
107 | * subsystem is idle. There is also an 'absolute maximum' reconstruction |
108 | * speed limit - in case reconstruction slows down your system despite | |
109 | * idle IO detection. | |
110 | * | |
111 | * you can change it via /proc/sys/dev/raid/speed_limit_min and _max. | |
88202a0c | 112 | * or /sys/block/mdX/md/sync_speed_{min,max} |
1da177e4 LT |
113 | */ |
114 | ||
115 | static int sysctl_speed_limit_min = 1000; | |
116 | static int sysctl_speed_limit_max = 200000; | |
fd01b88c | 117 | static inline int speed_min(struct mddev *mddev) |
88202a0c N |
118 | { |
119 | return mddev->sync_speed_min ? | |
120 | mddev->sync_speed_min : sysctl_speed_limit_min; | |
121 | } | |
122 | ||
fd01b88c | 123 | static inline int speed_max(struct mddev *mddev) |
88202a0c N |
124 | { |
125 | return mddev->sync_speed_max ? | |
126 | mddev->sync_speed_max : sysctl_speed_limit_max; | |
127 | } | |
1da177e4 | 128 | |
69b00b5b GJ |
129 | static void rdev_uninit_serial(struct md_rdev *rdev) |
130 | { | |
131 | if (!test_and_clear_bit(CollisionCheck, &rdev->flags)) | |
132 | return; | |
133 | ||
025471f9 | 134 | kvfree(rdev->serial); |
69b00b5b GJ |
135 | rdev->serial = NULL; |
136 | } | |
137 | ||
138 | static void rdevs_uninit_serial(struct mddev *mddev) | |
139 | { | |
140 | struct md_rdev *rdev; | |
141 | ||
142 | rdev_for_each(rdev, mddev) | |
143 | rdev_uninit_serial(rdev); | |
144 | } | |
145 | ||
404659cf | 146 | static int rdev_init_serial(struct md_rdev *rdev) |
3e148a32 | 147 | { |
025471f9 GJ |
148 | /* serial_nums equals with BARRIER_BUCKETS_NR */ |
149 | int i, serial_nums = 1 << ((PAGE_SHIFT - ilog2(sizeof(atomic_t)))); | |
69b00b5b GJ |
150 | struct serial_in_rdev *serial = NULL; |
151 | ||
152 | if (test_bit(CollisionCheck, &rdev->flags)) | |
153 | return 0; | |
154 | ||
025471f9 GJ |
155 | serial = kvmalloc(sizeof(struct serial_in_rdev) * serial_nums, |
156 | GFP_KERNEL); | |
69b00b5b GJ |
157 | if (!serial) |
158 | return -ENOMEM; | |
159 | ||
025471f9 GJ |
160 | for (i = 0; i < serial_nums; i++) { |
161 | struct serial_in_rdev *serial_tmp = &serial[i]; | |
162 | ||
163 | spin_lock_init(&serial_tmp->serial_lock); | |
164 | serial_tmp->serial_rb = RB_ROOT_CACHED; | |
165 | init_waitqueue_head(&serial_tmp->serial_io_wait); | |
166 | } | |
167 | ||
69b00b5b | 168 | rdev->serial = serial; |
404659cf | 169 | set_bit(CollisionCheck, &rdev->flags); |
3e148a32 | 170 | |
69b00b5b | 171 | return 0; |
3e148a32 GJ |
172 | } |
173 | ||
69b00b5b | 174 | static int rdevs_init_serial(struct mddev *mddev) |
11d3a9f6 GJ |
175 | { |
176 | struct md_rdev *rdev; | |
69b00b5b | 177 | int ret = 0; |
11d3a9f6 GJ |
178 | |
179 | rdev_for_each(rdev, mddev) { | |
69b00b5b GJ |
180 | ret = rdev_init_serial(rdev); |
181 | if (ret) | |
182 | break; | |
11d3a9f6 | 183 | } |
69b00b5b GJ |
184 | |
185 | /* Free all resources if pool is not existed */ | |
186 | if (ret && !mddev->serial_info_pool) | |
187 | rdevs_uninit_serial(mddev); | |
188 | ||
189 | return ret; | |
11d3a9f6 GJ |
190 | } |
191 | ||
963c555e | 192 | /* |
de31ee94 GJ |
193 | * rdev needs to enable serial stuffs if it meets the conditions: |
194 | * 1. it is multi-queue device flaged with writemostly. | |
195 | * 2. the write-behind mode is enabled. | |
196 | */ | |
197 | static int rdev_need_serial(struct md_rdev *rdev) | |
198 | { | |
199 | return (rdev && rdev->mddev->bitmap_info.max_write_behind > 0 && | |
e556f6ba | 200 | rdev->bdev->bd_disk->queue->nr_hw_queues != 1 && |
de31ee94 GJ |
201 | test_bit(WriteMostly, &rdev->flags)); |
202 | } | |
203 | ||
204 | /* | |
205 | * Init resource for rdev(s), then create serial_info_pool if: | |
206 | * 1. rdev is the first device which return true from rdev_enable_serial. | |
207 | * 2. rdev is NULL, means we want to enable serialization for all rdevs. | |
963c555e | 208 | */ |
404659cf | 209 | void mddev_create_serial_pool(struct mddev *mddev, struct md_rdev *rdev, |
11d3a9f6 | 210 | bool is_suspend) |
963c555e | 211 | { |
69b00b5b GJ |
212 | int ret = 0; |
213 | ||
de31ee94 GJ |
214 | if (rdev && !rdev_need_serial(rdev) && |
215 | !test_bit(CollisionCheck, &rdev->flags)) | |
963c555e GJ |
216 | return; |
217 | ||
de31ee94 GJ |
218 | if (!is_suspend) |
219 | mddev_suspend(mddev); | |
220 | ||
221 | if (!rdev) | |
69b00b5b | 222 | ret = rdevs_init_serial(mddev); |
de31ee94 | 223 | else |
69b00b5b GJ |
224 | ret = rdev_init_serial(rdev); |
225 | if (ret) | |
226 | goto abort; | |
de31ee94 | 227 | |
404659cf | 228 | if (mddev->serial_info_pool == NULL) { |
3024ba2d CL |
229 | /* |
230 | * already in memalloc noio context by | |
231 | * mddev_suspend() | |
232 | */ | |
404659cf GJ |
233 | mddev->serial_info_pool = |
234 | mempool_create_kmalloc_pool(NR_SERIAL_INFOS, | |
235 | sizeof(struct serial_info)); | |
69b00b5b GJ |
236 | if (!mddev->serial_info_pool) { |
237 | rdevs_uninit_serial(mddev); | |
404659cf | 238 | pr_err("can't alloc memory pool for serialization\n"); |
69b00b5b | 239 | } |
963c555e | 240 | } |
69b00b5b GJ |
241 | |
242 | abort: | |
de31ee94 GJ |
243 | if (!is_suspend) |
244 | mddev_resume(mddev); | |
963c555e | 245 | } |
963c555e GJ |
246 | |
247 | /* | |
de31ee94 GJ |
248 | * Free resource from rdev(s), and destroy serial_info_pool under conditions: |
249 | * 1. rdev is the last device flaged with CollisionCheck. | |
250 | * 2. when bitmap is destroyed while policy is not enabled. | |
251 | * 3. for disable policy, the pool is destroyed only when no rdev needs it. | |
963c555e | 252 | */ |
69b00b5b GJ |
253 | void mddev_destroy_serial_pool(struct mddev *mddev, struct md_rdev *rdev, |
254 | bool is_suspend) | |
963c555e | 255 | { |
11d3a9f6 | 256 | if (rdev && !test_bit(CollisionCheck, &rdev->flags)) |
963c555e GJ |
257 | return; |
258 | ||
404659cf | 259 | if (mddev->serial_info_pool) { |
963c555e | 260 | struct md_rdev *temp; |
de31ee94 | 261 | int num = 0; /* used to track if other rdevs need the pool */ |
963c555e | 262 | |
11d3a9f6 GJ |
263 | if (!is_suspend) |
264 | mddev_suspend(mddev); | |
265 | rdev_for_each(temp, mddev) { | |
266 | if (!rdev) { | |
69b00b5b GJ |
267 | if (!mddev->serialize_policy || |
268 | !rdev_need_serial(temp)) | |
269 | rdev_uninit_serial(temp); | |
de31ee94 GJ |
270 | else |
271 | num++; | |
272 | } else if (temp != rdev && | |
273 | test_bit(CollisionCheck, &temp->flags)) | |
963c555e | 274 | num++; |
11d3a9f6 GJ |
275 | } |
276 | ||
277 | if (rdev) | |
69b00b5b | 278 | rdev_uninit_serial(rdev); |
de31ee94 GJ |
279 | |
280 | if (num) | |
281 | pr_info("The mempool could be used by other devices\n"); | |
282 | else { | |
404659cf GJ |
283 | mempool_destroy(mddev->serial_info_pool); |
284 | mddev->serial_info_pool = NULL; | |
963c555e | 285 | } |
11d3a9f6 GJ |
286 | if (!is_suspend) |
287 | mddev_resume(mddev); | |
963c555e GJ |
288 | } |
289 | } | |
290 | ||
1da177e4 LT |
291 | static struct ctl_table_header *raid_table_header; |
292 | ||
82592c38 | 293 | static struct ctl_table raid_table[] = { |
1da177e4 | 294 | { |
1da177e4 LT |
295 | .procname = "speed_limit_min", |
296 | .data = &sysctl_speed_limit_min, | |
297 | .maxlen = sizeof(int), | |
80ca3a44 | 298 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 299 | .proc_handler = proc_dointvec, |
1da177e4 LT |
300 | }, |
301 | { | |
1da177e4 LT |
302 | .procname = "speed_limit_max", |
303 | .data = &sysctl_speed_limit_max, | |
304 | .maxlen = sizeof(int), | |
80ca3a44 | 305 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 306 | .proc_handler = proc_dointvec, |
1da177e4 | 307 | }, |
894d2491 | 308 | { } |
1da177e4 LT |
309 | }; |
310 | ||
f91de92e N |
311 | static int start_readonly; |
312 | ||
78b6350d N |
313 | /* |
314 | * The original mechanism for creating an md device is to create | |
315 | * a device node in /dev and to open it. This causes races with device-close. | |
316 | * The preferred method is to write to the "new_array" module parameter. | |
317 | * This can avoid races. | |
318 | * Setting create_on_open to false disables the original mechanism | |
319 | * so all the races disappear. | |
320 | */ | |
321 | static bool create_on_open = true; | |
322 | ||
d7603b7e N |
323 | /* |
324 | * We have a system wide 'event count' that is incremented | |
325 | * on any 'interesting' event, and readers of /proc/mdstat | |
326 | * can use 'poll' or 'select' to find out when the event | |
327 | * count increases. | |
328 | * | |
329 | * Events are: | |
330 | * start array, stop array, error, add device, remove device, | |
331 | * start build, activate spare | |
332 | */ | |
2989ddbd | 333 | static DECLARE_WAIT_QUEUE_HEAD(md_event_waiters); |
d7603b7e | 334 | static atomic_t md_event_count; |
54679486 | 335 | void md_new_event(void) |
d7603b7e N |
336 | { |
337 | atomic_inc(&md_event_count); | |
338 | wake_up(&md_event_waiters); | |
339 | } | |
29269553 | 340 | EXPORT_SYMBOL_GPL(md_new_event); |
d7603b7e | 341 | |
1da177e4 LT |
342 | /* |
343 | * Enables to iterate over all existing md arrays | |
344 | * all_mddevs_lock protects this list. | |
345 | */ | |
346 | static LIST_HEAD(all_mddevs); | |
347 | static DEFINE_SPINLOCK(all_mddevs_lock); | |
348 | ||
409c57f3 N |
349 | /* Rather than calling directly into the personality make_request function, |
350 | * IO requests come here first so that we can check if the device is | |
351 | * being suspended pending a reconfiguration. | |
352 | * We hold a refcount over the call to ->make_request. By the time that | |
353 | * call has finished, the bio has been linked into some internal structure | |
354 | * and so is visible to ->quiesce(), so we don't need the refcount any more. | |
355 | */ | |
b3143b9a N |
356 | static bool is_suspended(struct mddev *mddev, struct bio *bio) |
357 | { | |
d1932913 | 358 | if (is_md_suspended(mddev)) |
b3143b9a N |
359 | return true; |
360 | if (bio_data_dir(bio) != WRITE) | |
361 | return false; | |
362 | if (mddev->suspend_lo >= mddev->suspend_hi) | |
363 | return false; | |
364 | if (bio->bi_iter.bi_sector >= mddev->suspend_hi) | |
365 | return false; | |
366 | if (bio_end_sector(bio) < mddev->suspend_lo) | |
367 | return false; | |
368 | return true; | |
369 | } | |
370 | ||
393debc2 SL |
371 | void md_handle_request(struct mddev *mddev, struct bio *bio) |
372 | { | |
373 | check_suspended: | |
b3143b9a | 374 | if (is_suspended(mddev, bio)) { |
393debc2 | 375 | DEFINE_WAIT(__wait); |
f51d46d0 VV |
376 | /* Bail out if REQ_NOWAIT is set for the bio */ |
377 | if (bio->bi_opf & REQ_NOWAIT) { | |
f51d46d0 VV |
378 | bio_wouldblock_error(bio); |
379 | return; | |
380 | } | |
393debc2 SL |
381 | for (;;) { |
382 | prepare_to_wait(&mddev->sb_wait, &__wait, | |
383 | TASK_UNINTERRUPTIBLE); | |
b3143b9a | 384 | if (!is_suspended(mddev, bio)) |
393debc2 | 385 | break; |
393debc2 | 386 | schedule(); |
393debc2 SL |
387 | } |
388 | finish_wait(&mddev->sb_wait, &__wait); | |
389 | } | |
72adae23 XN |
390 | if (!percpu_ref_tryget_live(&mddev->active_io)) |
391 | goto check_suspended; | |
393debc2 SL |
392 | |
393 | if (!mddev->pers->make_request(mddev, bio)) { | |
72adae23 | 394 | percpu_ref_put(&mddev->active_io); |
393debc2 SL |
395 | goto check_suspended; |
396 | } | |
397 | ||
72adae23 | 398 | percpu_ref_put(&mddev->active_io); |
393debc2 SL |
399 | } |
400 | EXPORT_SYMBOL(md_handle_request); | |
401 | ||
3e08773c | 402 | static void md_submit_bio(struct bio *bio) |
1da177e4 | 403 | { |
49077326 | 404 | const int rw = bio_data_dir(bio); |
309dca30 | 405 | struct mddev *mddev = bio->bi_bdev->bd_disk->private_data; |
49077326 | 406 | |
9a5a8597 | 407 | if (mddev == NULL || mddev->pers == NULL) { |
62f7b198 | 408 | bio_io_error(bio); |
3e08773c | 409 | return; |
62f7b198 GP |
410 | } |
411 | ||
9a5a8597 | 412 | if (unlikely(test_bit(MD_BROKEN, &mddev->flags)) && (rw == WRITE)) { |
409c57f3 | 413 | bio_io_error(bio); |
3e08773c | 414 | return; |
409c57f3 | 415 | } |
9a5a8597 | 416 | |
5a97806f | 417 | bio = bio_split_to_limits(bio); |
613b1488 JA |
418 | if (!bio) |
419 | return; | |
9a5a8597 | 420 | |
f97a5528 | 421 | if (mddev->ro == MD_RDONLY && unlikely(rw == WRITE)) { |
4246a0b6 | 422 | if (bio_sectors(bio) != 0) |
4e4cbee9 | 423 | bio->bi_status = BLK_STS_IOERR; |
4246a0b6 | 424 | bio_endio(bio); |
3e08773c | 425 | return; |
bbfa57c0 | 426 | } |
49077326 | 427 | |
9c573de3 | 428 | /* bio could be mergeable after passing to underlayer */ |
1eff9d32 | 429 | bio->bi_opf &= ~REQ_NOMERGE; |
393debc2 SL |
430 | |
431 | md_handle_request(mddev, bio); | |
409c57f3 N |
432 | } |
433 | ||
9e35b99c N |
434 | /* mddev_suspend makes sure no new requests are submitted |
435 | * to the device, and that any requests that have been submitted | |
436 | * are completely handled. | |
afa0f557 N |
437 | * Once mddev_detach() is called and completes, the module will be |
438 | * completely unused. | |
9e35b99c | 439 | */ |
fd01b88c | 440 | void mddev_suspend(struct mddev *mddev) |
409c57f3 | 441 | { |
44693154 YK |
442 | struct md_thread *thread = rcu_dereference_protected(mddev->thread, |
443 | lockdep_is_held(&mddev->reconfig_mutex)); | |
444 | ||
445 | WARN_ON_ONCE(thread && current == thread->tsk); | |
0dc10e50 MP |
446 | if (mddev->suspended++) |
447 | return; | |
cc27b0c7 | 448 | wake_up(&mddev->sb_wait); |
35bfc521 | 449 | set_bit(MD_ALLOW_SB_UPDATE, &mddev->flags); |
72adae23 | 450 | percpu_ref_kill(&mddev->active_io); |
3e00777d YK |
451 | |
452 | if (mddev->pers->prepare_suspend) | |
453 | mddev->pers->prepare_suspend(mddev); | |
454 | ||
72adae23 | 455 | wait_event(mddev->sb_wait, percpu_ref_is_zero(&mddev->active_io)); |
35bfc521 N |
456 | clear_bit_unlock(MD_ALLOW_SB_UPDATE, &mddev->flags); |
457 | wait_event(mddev->sb_wait, !test_bit(MD_UPDATING_SB, &mddev->flags)); | |
0d9f4f13 JB |
458 | |
459 | del_timer_sync(&mddev->safemode_timer); | |
78f57ef9 CL |
460 | /* restrict memory reclaim I/O during raid array is suspend */ |
461 | mddev->noio_flag = memalloc_noio_save(); | |
409c57f3 | 462 | } |
390ee602 | 463 | EXPORT_SYMBOL_GPL(mddev_suspend); |
409c57f3 | 464 | |
fd01b88c | 465 | void mddev_resume(struct mddev *mddev) |
409c57f3 | 466 | { |
4d5324f7 | 467 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
468 | if (--mddev->suspended) |
469 | return; | |
e24ed043 YK |
470 | |
471 | /* entred the memalloc scope from mddev_suspend() */ | |
472 | memalloc_noio_restore(mddev->noio_flag); | |
473 | ||
72adae23 | 474 | percpu_ref_resurrect(&mddev->active_io); |
409c57f3 | 475 | wake_up(&mddev->sb_wait); |
0fd018af | 476 | |
47525e59 | 477 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
0fd018af JB |
478 | md_wakeup_thread(mddev->thread); |
479 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
1da177e4 | 480 | } |
390ee602 | 481 | EXPORT_SYMBOL_GPL(mddev_resume); |
1da177e4 | 482 | |
a2826aa9 | 483 | /* |
e9c7469b | 484 | * Generic flush handling for md |
a2826aa9 N |
485 | */ |
486 | ||
4bc034d3 | 487 | static void md_end_flush(struct bio *bio) |
a2826aa9 | 488 | { |
4bc034d3 N |
489 | struct md_rdev *rdev = bio->bi_private; |
490 | struct mddev *mddev = rdev->mddev; | |
a2826aa9 | 491 | |
341097ee MP |
492 | bio_put(bio); |
493 | ||
a2826aa9 N |
494 | rdev_dec_pending(rdev, mddev); |
495 | ||
4bc034d3 N |
496 | if (atomic_dec_and_test(&mddev->flush_pending)) { |
497 | /* The pre-request flush has finished */ | |
498 | queue_work(md_wq, &mddev->flush_work); | |
a2826aa9 | 499 | } |
5a409b4f | 500 | } |
a7a07e69 | 501 | |
4bc034d3 N |
502 | static void md_submit_flush_data(struct work_struct *ws); |
503 | ||
504 | static void submit_flushes(struct work_struct *ws) | |
a2826aa9 | 505 | { |
4bc034d3 | 506 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); |
3cb03002 | 507 | struct md_rdev *rdev; |
a2826aa9 | 508 | |
2bc13b83 | 509 | mddev->start_flush = ktime_get_boottime(); |
4bc034d3 N |
510 | INIT_WORK(&mddev->flush_work, md_submit_flush_data); |
511 | atomic_set(&mddev->flush_pending, 1); | |
a2826aa9 | 512 | rcu_read_lock(); |
dafb20fa | 513 | rdev_for_each_rcu(rdev, mddev) |
a2826aa9 N |
514 | if (rdev->raid_disk >= 0 && |
515 | !test_bit(Faulty, &rdev->flags)) { | |
516 | /* Take two references, one is dropped | |
517 | * when request finishes, one after | |
518 | * we reclaim rcu_read_lock | |
519 | */ | |
520 | struct bio *bi; | |
521 | atomic_inc(&rdev->nr_pending); | |
522 | atomic_inc(&rdev->nr_pending); | |
523 | rcu_read_unlock(); | |
609be106 CH |
524 | bi = bio_alloc_bioset(rdev->bdev, 0, |
525 | REQ_OP_WRITE | REQ_PREFLUSH, | |
526 | GFP_NOIO, &mddev->bio_set); | |
5a409b4f | 527 | bi->bi_end_io = md_end_flush; |
4bc034d3 | 528 | bi->bi_private = rdev; |
4bc034d3 | 529 | atomic_inc(&mddev->flush_pending); |
4e49ea4a | 530 | submit_bio(bi); |
a2826aa9 N |
531 | rcu_read_lock(); |
532 | rdev_dec_pending(rdev, mddev); | |
533 | } | |
534 | rcu_read_unlock(); | |
4bc034d3 N |
535 | if (atomic_dec_and_test(&mddev->flush_pending)) |
536 | queue_work(md_wq, &mddev->flush_work); | |
537 | } | |
a2826aa9 | 538 | |
4bc034d3 N |
539 | static void md_submit_flush_data(struct work_struct *ws) |
540 | { | |
541 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); | |
542 | struct bio *bio = mddev->flush_bio; | |
543 | ||
544 | /* | |
545 | * must reset flush_bio before calling into md_handle_request to avoid a | |
546 | * deadlock, because other bios passed md_handle_request suspend check | |
547 | * could wait for this and below md_handle_request could wait for those | |
548 | * bios because of suspend check | |
549 | */ | |
dc5d17a3 | 550 | spin_lock_irq(&mddev->lock); |
81ba3c24 | 551 | mddev->prev_flush_start = mddev->start_flush; |
4bc034d3 | 552 | mddev->flush_bio = NULL; |
dc5d17a3 | 553 | spin_unlock_irq(&mddev->lock); |
4bc034d3 N |
554 | wake_up(&mddev->sb_wait); |
555 | ||
556 | if (bio->bi_iter.bi_size == 0) { | |
557 | /* an empty barrier - all done */ | |
558 | bio_endio(bio); | |
559 | } else { | |
560 | bio->bi_opf &= ~REQ_PREFLUSH; | |
561 | md_handle_request(mddev, bio); | |
a2826aa9 | 562 | } |
a2826aa9 | 563 | } |
4bc034d3 | 564 | |
775d7831 DJ |
565 | /* |
566 | * Manages consolidation of flushes and submitting any flushes needed for | |
567 | * a bio with REQ_PREFLUSH. Returns true if the bio is finished or is | |
568 | * being finished in another context. Returns false if the flushing is | |
569 | * complete but still needs the I/O portion of the bio to be processed. | |
570 | */ | |
571 | bool md_flush_request(struct mddev *mddev, struct bio *bio) | |
4bc034d3 | 572 | { |
81ba3c24 | 573 | ktime_t req_start = ktime_get_boottime(); |
4bc034d3 | 574 | spin_lock_irq(&mddev->lock); |
204d1a64 PG |
575 | /* flush requests wait until ongoing flush completes, |
576 | * hence coalescing all the pending requests. | |
577 | */ | |
4bc034d3 | 578 | wait_event_lock_irq(mddev->sb_wait, |
2bc13b83 | 579 | !mddev->flush_bio || |
a23f2aae | 580 | ktime_before(req_start, mddev->prev_flush_start), |
4bc034d3 | 581 | mddev->lock); |
204d1a64 | 582 | /* new request after previous flush is completed */ |
a23f2aae | 583 | if (ktime_after(req_start, mddev->prev_flush_start)) { |
2bc13b83 N |
584 | WARN_ON(mddev->flush_bio); |
585 | mddev->flush_bio = bio; | |
586 | bio = NULL; | |
587 | } | |
4bc034d3 N |
588 | spin_unlock_irq(&mddev->lock); |
589 | ||
2bc13b83 N |
590 | if (!bio) { |
591 | INIT_WORK(&mddev->flush_work, submit_flushes); | |
592 | queue_work(md_wq, &mddev->flush_work); | |
593 | } else { | |
594 | /* flush was performed for some other bio while we waited. */ | |
595 | if (bio->bi_iter.bi_size == 0) | |
596 | /* an empty barrier - all done */ | |
597 | bio_endio(bio); | |
598 | else { | |
599 | bio->bi_opf &= ~REQ_PREFLUSH; | |
775d7831 | 600 | return false; |
2bc13b83 N |
601 | } |
602 | } | |
775d7831 | 603 | return true; |
4bc034d3 | 604 | } |
e9c7469b | 605 | EXPORT_SYMBOL(md_flush_request); |
409c57f3 | 606 | |
fd01b88c | 607 | static inline struct mddev *mddev_get(struct mddev *mddev) |
1da177e4 | 608 | { |
12a6caf2 CH |
609 | lockdep_assert_held(&all_mddevs_lock); |
610 | ||
611 | if (test_bit(MD_DELETED, &mddev->flags)) | |
612 | return NULL; | |
1da177e4 LT |
613 | atomic_inc(&mddev->active); |
614 | return mddev; | |
615 | } | |
616 | ||
5fd3a17e | 617 | static void mddev_delayed_delete(struct work_struct *ws); |
d3374825 | 618 | |
34cb92c0 | 619 | void mddev_put(struct mddev *mddev) |
1da177e4 LT |
620 | { |
621 | if (!atomic_dec_and_lock(&mddev->active, &all_mddevs_lock)) | |
622 | return; | |
d3374825 | 623 | if (!mddev->raid_disks && list_empty(&mddev->disks) && |
cbd19983 N |
624 | mddev->ctime == 0 && !mddev->hold_active) { |
625 | /* Array is not configured at all, and not held active, | |
626 | * so destroy it */ | |
12a6caf2 | 627 | set_bit(MD_DELETED, &mddev->flags); |
28dec870 KO |
628 | |
629 | /* | |
630 | * Call queue_work inside the spinlock so that | |
631 | * flush_workqueue() after mddev_find will succeed in waiting | |
632 | * for the work to be done. | |
633 | */ | |
634 | INIT_WORK(&mddev->del_work, mddev_delayed_delete); | |
635 | queue_work(md_misc_wq, &mddev->del_work); | |
d3374825 N |
636 | } |
637 | spin_unlock(&all_mddevs_lock); | |
1da177e4 LT |
638 | } |
639 | ||
8376d3c1 | 640 | static void md_safemode_timeout(struct timer_list *t); |
25b2edfa | 641 | |
fd01b88c | 642 | void mddev_init(struct mddev *mddev) |
fafd7fb0 N |
643 | { |
644 | mutex_init(&mddev->open_mutex); | |
645 | mutex_init(&mddev->reconfig_mutex); | |
6f56f0c4 | 646 | mutex_init(&mddev->sync_mutex); |
fafd7fb0 N |
647 | mutex_init(&mddev->bitmap_info.mutex); |
648 | INIT_LIST_HEAD(&mddev->disks); | |
649 | INIT_LIST_HEAD(&mddev->all_mddevs); | |
3ce94ce5 | 650 | INIT_LIST_HEAD(&mddev->deleting); |
8376d3c1 | 651 | timer_setup(&mddev->safemode_timer, md_safemode_timeout, 0); |
fafd7fb0 N |
652 | atomic_set(&mddev->active, 1); |
653 | atomic_set(&mddev->openers, 0); | |
130443d6 | 654 | atomic_set(&mddev->sync_seq, 0); |
85572d7c | 655 | spin_lock_init(&mddev->lock); |
4bc034d3 | 656 | atomic_set(&mddev->flush_pending, 0); |
fafd7fb0 N |
657 | init_waitqueue_head(&mddev->sb_wait); |
658 | init_waitqueue_head(&mddev->recovery_wait); | |
659 | mddev->reshape_position = MaxSector; | |
2c810cdd | 660 | mddev->reshape_backwards = 0; |
c4a39551 | 661 | mddev->last_sync_action = "none"; |
fafd7fb0 N |
662 | mddev->resync_min = 0; |
663 | mddev->resync_max = MaxSector; | |
664 | mddev->level = LEVEL_NONE; | |
665 | } | |
390ee602 | 666 | EXPORT_SYMBOL_GPL(mddev_init); |
fafd7fb0 | 667 | |
8b57251f CH |
668 | static struct mddev *mddev_find_locked(dev_t unit) |
669 | { | |
670 | struct mddev *mddev; | |
671 | ||
672 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
673 | if (mddev->unit == unit) | |
674 | return mddev; | |
675 | ||
676 | return NULL; | |
677 | } | |
678 | ||
85c8c3c1 CH |
679 | /* find an unused unit number */ |
680 | static dev_t mddev_alloc_unit(void) | |
681 | { | |
682 | static int next_minor = 512; | |
683 | int start = next_minor; | |
684 | bool is_free = 0; | |
685 | dev_t dev = 0; | |
686 | ||
687 | while (!is_free) { | |
688 | dev = MKDEV(MD_MAJOR, next_minor); | |
689 | next_minor++; | |
690 | if (next_minor > MINORMASK) | |
691 | next_minor = 0; | |
692 | if (next_minor == start) | |
693 | return 0; /* Oh dear, all in use. */ | |
694 | is_free = !mddev_find_locked(dev); | |
695 | } | |
696 | ||
697 | return dev; | |
698 | } | |
699 | ||
0d809b38 | 700 | static struct mddev *mddev_alloc(dev_t unit) |
1da177e4 | 701 | { |
0d809b38 CH |
702 | struct mddev *new; |
703 | int error; | |
1da177e4 | 704 | |
8f5f02c4 | 705 | if (unit && MAJOR(unit) != MD_MAJOR) |
d144fe6f | 706 | unit &= ~((1 << MdpMinorShift) - 1); |
8f5f02c4 | 707 | |
d144fe6f CH |
708 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
709 | if (!new) | |
0d809b38 | 710 | return ERR_PTR(-ENOMEM); |
d144fe6f | 711 | mddev_init(new); |
efeb53c0 | 712 | |
d144fe6f | 713 | spin_lock(&all_mddevs_lock); |
efeb53c0 | 714 | if (unit) { |
0d809b38 CH |
715 | error = -EEXIST; |
716 | if (mddev_find_locked(unit)) | |
d144fe6f | 717 | goto out_free_new; |
d144fe6f CH |
718 | new->unit = unit; |
719 | if (MAJOR(unit) == MD_MAJOR) | |
720 | new->md_minor = MINOR(unit); | |
721 | else | |
722 | new->md_minor = MINOR(unit) >> MdpMinorShift; | |
723 | new->hold_active = UNTIL_IOCTL; | |
724 | } else { | |
0d809b38 | 725 | error = -ENODEV; |
85c8c3c1 | 726 | new->unit = mddev_alloc_unit(); |
d144fe6f CH |
727 | if (!new->unit) |
728 | goto out_free_new; | |
85c8c3c1 | 729 | new->md_minor = MINOR(new->unit); |
efeb53c0 | 730 | new->hold_active = UNTIL_STOP; |
1da177e4 | 731 | } |
1da177e4 | 732 | |
d144fe6f CH |
733 | list_add(&new->all_mddevs, &all_mddevs); |
734 | spin_unlock(&all_mddevs_lock); | |
735 | return new; | |
736 | out_free_new: | |
737 | spin_unlock(&all_mddevs_lock); | |
738 | kfree(new); | |
0d809b38 | 739 | return ERR_PTR(error); |
1da177e4 LT |
740 | } |
741 | ||
c57094a6 CH |
742 | static void mddev_free(struct mddev *mddev) |
743 | { | |
744 | spin_lock(&all_mddevs_lock); | |
745 | list_del(&mddev->all_mddevs); | |
746 | spin_unlock(&all_mddevs_lock); | |
747 | ||
748 | kfree(mddev); | |
749 | } | |
750 | ||
c32dc040 | 751 | static const struct attribute_group md_redundancy_group; |
b6eb127d | 752 | |
4934b640 | 753 | void mddev_unlock(struct mddev *mddev) |
3ce94ce5 YK |
754 | { |
755 | struct md_rdev *rdev; | |
756 | struct md_rdev *tmp; | |
4934b640 | 757 | LIST_HEAD(delete); |
3ce94ce5 | 758 | |
4934b640 YK |
759 | if (!list_empty(&mddev->deleting)) |
760 | list_splice_init(&mddev->deleting, &delete); | |
3ce94ce5 | 761 | |
a64c876f | 762 | if (mddev->to_remove) { |
b6eb127d N |
763 | /* These cannot be removed under reconfig_mutex as |
764 | * an access to the files will try to take reconfig_mutex | |
765 | * while holding the file unremovable, which leads to | |
766 | * a deadlock. | |
bb4f1e9d N |
767 | * So hold set sysfs_active while the remove in happeing, |
768 | * and anything else which might set ->to_remove or my | |
769 | * otherwise change the sysfs namespace will fail with | |
770 | * -EBUSY if sysfs_active is still set. | |
771 | * We set sysfs_active under reconfig_mutex and elsewhere | |
772 | * test it under the same mutex to ensure its correct value | |
773 | * is seen. | |
b6eb127d | 774 | */ |
c32dc040 | 775 | const struct attribute_group *to_remove = mddev->to_remove; |
a64c876f | 776 | mddev->to_remove = NULL; |
bb4f1e9d | 777 | mddev->sysfs_active = 1; |
b6eb127d N |
778 | mutex_unlock(&mddev->reconfig_mutex); |
779 | ||
00bcb4ac N |
780 | if (mddev->kobj.sd) { |
781 | if (to_remove != &md_redundancy_group) | |
782 | sysfs_remove_group(&mddev->kobj, to_remove); | |
783 | if (mddev->pers == NULL || | |
784 | mddev->pers->sync_request == NULL) { | |
785 | sysfs_remove_group(&mddev->kobj, &md_redundancy_group); | |
786 | if (mddev->sysfs_action) | |
787 | sysfs_put(mddev->sysfs_action); | |
e8efa9b8 JB |
788 | if (mddev->sysfs_completed) |
789 | sysfs_put(mddev->sysfs_completed); | |
790 | if (mddev->sysfs_degraded) | |
791 | sysfs_put(mddev->sysfs_degraded); | |
00bcb4ac | 792 | mddev->sysfs_action = NULL; |
e8efa9b8 JB |
793 | mddev->sysfs_completed = NULL; |
794 | mddev->sysfs_degraded = NULL; | |
00bcb4ac | 795 | } |
a64c876f | 796 | } |
bb4f1e9d | 797 | mddev->sysfs_active = 0; |
b6eb127d N |
798 | } else |
799 | mutex_unlock(&mddev->reconfig_mutex); | |
1da177e4 | 800 | |
7deac114 YK |
801 | md_wakeup_thread(mddev->thread); |
802 | wake_up(&mddev->sb_wait); | |
803 | ||
4934b640 YK |
804 | list_for_each_entry_safe(rdev, tmp, &delete, same_set) { |
805 | list_del_init(&rdev->same_set); | |
806 | kobject_del(&rdev->kobj); | |
807 | export_rdev(rdev, mddev); | |
808 | } | |
1da177e4 | 809 | } |
5c47daf6 | 810 | EXPORT_SYMBOL_GPL(mddev_unlock); |
1da177e4 | 811 | |
57d051dc | 812 | struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr) |
1ca69c4b N |
813 | { |
814 | struct md_rdev *rdev; | |
815 | ||
816 | rdev_for_each_rcu(rdev, mddev) | |
817 | if (rdev->desc_nr == nr) | |
818 | return rdev; | |
819 | ||
820 | return NULL; | |
821 | } | |
57d051dc | 822 | EXPORT_SYMBOL_GPL(md_find_rdev_nr_rcu); |
1ca69c4b N |
823 | |
824 | static struct md_rdev *find_rdev(struct mddev *mddev, dev_t dev) | |
1da177e4 | 825 | { |
3cb03002 | 826 | struct md_rdev *rdev; |
1da177e4 | 827 | |
dafb20fa | 828 | rdev_for_each(rdev, mddev) |
1da177e4 LT |
829 | if (rdev->bdev->bd_dev == dev) |
830 | return rdev; | |
159ec1fc | 831 | |
1da177e4 LT |
832 | return NULL; |
833 | } | |
834 | ||
1532d9e8 | 835 | struct md_rdev *md_find_rdev_rcu(struct mddev *mddev, dev_t dev) |
1ca69c4b N |
836 | { |
837 | struct md_rdev *rdev; | |
838 | ||
839 | rdev_for_each_rcu(rdev, mddev) | |
840 | if (rdev->bdev->bd_dev == dev) | |
841 | return rdev; | |
842 | ||
843 | return NULL; | |
844 | } | |
1532d9e8 | 845 | EXPORT_SYMBOL_GPL(md_find_rdev_rcu); |
1ca69c4b | 846 | |
84fc4b56 | 847 | static struct md_personality *find_pers(int level, char *clevel) |
2604b703 | 848 | { |
84fc4b56 | 849 | struct md_personality *pers; |
d9d166c2 N |
850 | list_for_each_entry(pers, &pers_list, list) { |
851 | if (level != LEVEL_NONE && pers->level == level) | |
2604b703 | 852 | return pers; |
d9d166c2 N |
853 | if (strcmp(pers->name, clevel)==0) |
854 | return pers; | |
855 | } | |
2604b703 N |
856 | return NULL; |
857 | } | |
858 | ||
b73df2d3 | 859 | /* return the offset of the super block in 512byte sectors */ |
3cb03002 | 860 | static inline sector_t calc_dev_sboffset(struct md_rdev *rdev) |
1da177e4 | 861 | { |
0fe80347 | 862 | return MD_NEW_SIZE_SECTORS(bdev_nr_sectors(rdev->bdev)); |
1da177e4 LT |
863 | } |
864 | ||
f72ffdd6 | 865 | static int alloc_disk_sb(struct md_rdev *rdev) |
1da177e4 | 866 | { |
1da177e4 | 867 | rdev->sb_page = alloc_page(GFP_KERNEL); |
7f0f0d87 | 868 | if (!rdev->sb_page) |
ebc24337 | 869 | return -ENOMEM; |
1da177e4 LT |
870 | return 0; |
871 | } | |
872 | ||
545c8795 | 873 | void md_rdev_clear(struct md_rdev *rdev) |
1da177e4 LT |
874 | { |
875 | if (rdev->sb_page) { | |
2d1f3b5d | 876 | put_page(rdev->sb_page); |
1da177e4 LT |
877 | rdev->sb_loaded = 0; |
878 | rdev->sb_page = NULL; | |
0f420358 | 879 | rdev->sb_start = 0; |
dd8ac336 | 880 | rdev->sectors = 0; |
1da177e4 | 881 | } |
2699b672 N |
882 | if (rdev->bb_page) { |
883 | put_page(rdev->bb_page); | |
884 | rdev->bb_page = NULL; | |
885 | } | |
d3b407fb | 886 | badblocks_exit(&rdev->badblocks); |
1da177e4 | 887 | } |
545c8795 | 888 | EXPORT_SYMBOL_GPL(md_rdev_clear); |
1da177e4 | 889 | |
4246a0b6 | 890 | static void super_written(struct bio *bio) |
7bfa19f2 | 891 | { |
3cb03002 | 892 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 893 | struct mddev *mddev = rdev->mddev; |
7bfa19f2 | 894 | |
4e4cbee9 | 895 | if (bio->bi_status) { |
b3db8a21 GJ |
896 | pr_err("md: %s gets error=%d\n", __func__, |
897 | blk_status_to_errno(bio->bi_status)); | |
a9701a30 | 898 | md_error(mddev, rdev); |
46533ff7 N |
899 | if (!test_bit(Faulty, &rdev->flags) |
900 | && (bio->bi_opf & MD_FAILFAST)) { | |
2953079c | 901 | set_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags); |
46533ff7 N |
902 | set_bit(LastDev, &rdev->flags); |
903 | } | |
904 | } else | |
905 | clear_bit(LastDev, &rdev->flags); | |
7bfa19f2 | 906 | |
341097ee MP |
907 | bio_put(bio); |
908 | ||
909 | rdev_dec_pending(rdev, mddev); | |
910 | ||
a9701a30 N |
911 | if (atomic_dec_and_test(&mddev->pending_writes)) |
912 | wake_up(&mddev->sb_wait); | |
7bfa19f2 N |
913 | } |
914 | ||
fd01b88c | 915 | void md_super_write(struct mddev *mddev, struct md_rdev *rdev, |
7bfa19f2 N |
916 | sector_t sector, int size, struct page *page) |
917 | { | |
918 | /* write first size bytes of page to sector of rdev | |
919 | * Increment mddev->pending_writes before returning | |
920 | * and decrement it on completion, waking up sb_wait | |
921 | * if zero is reached. | |
922 | * If an error occurred, call md_error | |
923 | */ | |
46533ff7 | 924 | struct bio *bio; |
46533ff7 | 925 | |
4b6c1060 HM |
926 | if (!page) |
927 | return; | |
928 | ||
46533ff7 N |
929 | if (test_bit(Faulty, &rdev->flags)) |
930 | return; | |
931 | ||
609be106 CH |
932 | bio = bio_alloc_bioset(rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev, |
933 | 1, | |
934 | REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH | REQ_FUA, | |
935 | GFP_NOIO, &mddev->sync_set); | |
7bfa19f2 | 936 | |
ed3b98c7 SL |
937 | atomic_inc(&rdev->nr_pending); |
938 | ||
4f024f37 | 939 | bio->bi_iter.bi_sector = sector; |
3c383235 | 940 | __bio_add_page(bio, page, size, 0); |
7bfa19f2 N |
941 | bio->bi_private = rdev; |
942 | bio->bi_end_io = super_written; | |
46533ff7 N |
943 | |
944 | if (test_bit(MD_FAILFAST_SUPPORTED, &mddev->flags) && | |
945 | test_bit(FailFast, &rdev->flags) && | |
946 | !test_bit(LastDev, &rdev->flags)) | |
609be106 | 947 | bio->bi_opf |= MD_FAILFAST; |
a9701a30 | 948 | |
7bfa19f2 | 949 | atomic_inc(&mddev->pending_writes); |
4e49ea4a | 950 | submit_bio(bio); |
a9701a30 N |
951 | } |
952 | ||
46533ff7 | 953 | int md_super_wait(struct mddev *mddev) |
a9701a30 | 954 | { |
e9c7469b | 955 | /* wait for all superblock writes that were scheduled to complete */ |
1967cd56 | 956 | wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0); |
2953079c | 957 | if (test_and_clear_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags)) |
46533ff7 N |
958 | return -EAGAIN; |
959 | return 0; | |
7bfa19f2 N |
960 | } |
961 | ||
3cb03002 | 962 | int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, |
4ce4c73f | 963 | struct page *page, blk_opf_t opf, bool metadata_op) |
1da177e4 | 964 | { |
32637385 CH |
965 | struct bio bio; |
966 | struct bio_vec bvec; | |
967 | ||
74d46992 | 968 | if (metadata_op && rdev->meta_bdev) |
4ce4c73f | 969 | bio_init(&bio, rdev->meta_bdev, &bvec, 1, opf); |
74d46992 | 970 | else |
4ce4c73f | 971 | bio_init(&bio, rdev->bdev, &bvec, 1, opf); |
49add496 | 972 | |
ccebd4c4 | 973 | if (metadata_op) |
32637385 | 974 | bio.bi_iter.bi_sector = sector + rdev->sb_start; |
1fdd6fc9 N |
975 | else if (rdev->mddev->reshape_position != MaxSector && |
976 | (rdev->mddev->reshape_backwards == | |
977 | (sector >= rdev->mddev->reshape_position))) | |
32637385 | 978 | bio.bi_iter.bi_sector = sector + rdev->new_data_offset; |
ccebd4c4 | 979 | else |
32637385 | 980 | bio.bi_iter.bi_sector = sector + rdev->data_offset; |
3c383235 | 981 | __bio_add_page(&bio, page, size, 0); |
4e49ea4a | 982 | |
32637385 | 983 | submit_bio_wait(&bio); |
1da177e4 | 984 | |
32637385 | 985 | return !bio.bi_status; |
1da177e4 | 986 | } |
a8745db2 | 987 | EXPORT_SYMBOL_GPL(sync_page_io); |
1da177e4 | 988 | |
f72ffdd6 | 989 | static int read_disk_sb(struct md_rdev *rdev, int size) |
1da177e4 | 990 | { |
1da177e4 LT |
991 | if (rdev->sb_loaded) |
992 | return 0; | |
993 | ||
4ce4c73f | 994 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, REQ_OP_READ, true)) |
1da177e4 LT |
995 | goto fail; |
996 | rdev->sb_loaded = 1; | |
997 | return 0; | |
998 | ||
999 | fail: | |
913cce5a CH |
1000 | pr_err("md: disabled device %pg, could not read superblock.\n", |
1001 | rdev->bdev); | |
1da177e4 LT |
1002 | return -EINVAL; |
1003 | } | |
1004 | ||
e6fd2093 | 1005 | static int md_uuid_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 | 1006 | { |
f72ffdd6 | 1007 | return sb1->set_uuid0 == sb2->set_uuid0 && |
05710466 AN |
1008 | sb1->set_uuid1 == sb2->set_uuid1 && |
1009 | sb1->set_uuid2 == sb2->set_uuid2 && | |
1010 | sb1->set_uuid3 == sb2->set_uuid3; | |
1da177e4 LT |
1011 | } |
1012 | ||
e6fd2093 | 1013 | static int md_sb_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 LT |
1014 | { |
1015 | int ret; | |
1016 | mdp_super_t *tmp1, *tmp2; | |
1017 | ||
1018 | tmp1 = kmalloc(sizeof(*tmp1),GFP_KERNEL); | |
1019 | tmp2 = kmalloc(sizeof(*tmp2),GFP_KERNEL); | |
1020 | ||
1021 | if (!tmp1 || !tmp2) { | |
1022 | ret = 0; | |
1da177e4 LT |
1023 | goto abort; |
1024 | } | |
1025 | ||
1026 | *tmp1 = *sb1; | |
1027 | *tmp2 = *sb2; | |
1028 | ||
1029 | /* | |
1030 | * nr_disks is not constant | |
1031 | */ | |
1032 | tmp1->nr_disks = 0; | |
1033 | tmp2->nr_disks = 0; | |
1034 | ||
ce0c8e05 | 1035 | ret = (memcmp(tmp1, tmp2, MD_SB_GENERIC_CONSTANT_WORDS * 4) == 0); |
1da177e4 | 1036 | abort: |
990a8baf JJ |
1037 | kfree(tmp1); |
1038 | kfree(tmp2); | |
1da177e4 LT |
1039 | return ret; |
1040 | } | |
1041 | ||
4d167f09 N |
1042 | static u32 md_csum_fold(u32 csum) |
1043 | { | |
1044 | csum = (csum & 0xffff) + (csum >> 16); | |
1045 | return (csum & 0xffff) + (csum >> 16); | |
1046 | } | |
1047 | ||
f72ffdd6 | 1048 | static unsigned int calc_sb_csum(mdp_super_t *sb) |
1da177e4 | 1049 | { |
4d167f09 N |
1050 | u64 newcsum = 0; |
1051 | u32 *sb32 = (u32*)sb; | |
1052 | int i; | |
1da177e4 LT |
1053 | unsigned int disk_csum, csum; |
1054 | ||
1055 | disk_csum = sb->sb_csum; | |
1056 | sb->sb_csum = 0; | |
4d167f09 N |
1057 | |
1058 | for (i = 0; i < MD_SB_BYTES/4 ; i++) | |
1059 | newcsum += sb32[i]; | |
1060 | csum = (newcsum & 0xffffffff) + (newcsum>>32); | |
1061 | ||
4d167f09 N |
1062 | #ifdef CONFIG_ALPHA |
1063 | /* This used to use csum_partial, which was wrong for several | |
1064 | * reasons including that different results are returned on | |
1065 | * different architectures. It isn't critical that we get exactly | |
1066 | * the same return value as before (we always csum_fold before | |
1067 | * testing, and that removes any differences). However as we | |
1068 | * know that csum_partial always returned a 16bit value on | |
1069 | * alphas, do a fold to maximise conformity to previous behaviour. | |
1070 | */ | |
1071 | sb->sb_csum = md_csum_fold(disk_csum); | |
1072 | #else | |
1da177e4 | 1073 | sb->sb_csum = disk_csum; |
4d167f09 | 1074 | #endif |
1da177e4 LT |
1075 | return csum; |
1076 | } | |
1077 | ||
1da177e4 LT |
1078 | /* |
1079 | * Handle superblock details. | |
1080 | * We want to be able to handle multiple superblock formats | |
1081 | * so we have a common interface to them all, and an array of | |
1082 | * different handlers. | |
1083 | * We rely on user-space to write the initial superblock, and support | |
1084 | * reading and updating of superblocks. | |
1085 | * Interface methods are: | |
3cb03002 | 1086 | * int load_super(struct md_rdev *dev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1087 | * loads and validates a superblock on dev. |
1088 | * if refdev != NULL, compare superblocks on both devices | |
1089 | * Return: | |
1090 | * 0 - dev has a superblock that is compatible with refdev | |
1091 | * 1 - dev has a superblock that is compatible and newer than refdev | |
1092 | * so dev should be used as the refdev in future | |
1093 | * -EINVAL superblock incompatible or invalid | |
1094 | * -othererror e.g. -EIO | |
1095 | * | |
fd01b88c | 1096 | * int validate_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1097 | * Verify that dev is acceptable into mddev. |
1098 | * The first time, mddev->raid_disks will be 0, and data from | |
1099 | * dev should be merged in. Subsequent calls check that dev | |
1100 | * is new enough. Return 0 or -EINVAL | |
1101 | * | |
fd01b88c | 1102 | * void sync_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1103 | * Update the superblock for rdev with data in mddev |
1104 | * This does not write to disc. | |
1105 | * | |
1106 | */ | |
1107 | ||
1108 | struct super_type { | |
0cd17fec CW |
1109 | char *name; |
1110 | struct module *owner; | |
c6563a8c N |
1111 | int (*load_super)(struct md_rdev *rdev, |
1112 | struct md_rdev *refdev, | |
0cd17fec | 1113 | int minor_version); |
c6563a8c N |
1114 | int (*validate_super)(struct mddev *mddev, |
1115 | struct md_rdev *rdev); | |
1116 | void (*sync_super)(struct mddev *mddev, | |
1117 | struct md_rdev *rdev); | |
3cb03002 | 1118 | unsigned long long (*rdev_size_change)(struct md_rdev *rdev, |
15f4a5fd | 1119 | sector_t num_sectors); |
c6563a8c N |
1120 | int (*allow_new_offset)(struct md_rdev *rdev, |
1121 | unsigned long long new_offset); | |
1da177e4 LT |
1122 | }; |
1123 | ||
0894cc30 AN |
1124 | /* |
1125 | * Check that the given mddev has no bitmap. | |
1126 | * | |
1127 | * This function is called from the run method of all personalities that do not | |
1128 | * support bitmaps. It prints an error message and returns non-zero if mddev | |
1129 | * has a bitmap. Otherwise, it returns 0. | |
1130 | * | |
1131 | */ | |
fd01b88c | 1132 | int md_check_no_bitmap(struct mddev *mddev) |
0894cc30 | 1133 | { |
c3d9714e | 1134 | if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset) |
0894cc30 | 1135 | return 0; |
9d48739e | 1136 | pr_warn("%s: bitmaps are not supported for %s\n", |
0894cc30 AN |
1137 | mdname(mddev), mddev->pers->name); |
1138 | return 1; | |
1139 | } | |
1140 | EXPORT_SYMBOL(md_check_no_bitmap); | |
1141 | ||
1da177e4 | 1142 | /* |
f72ffdd6 | 1143 | * load_super for 0.90.0 |
1da177e4 | 1144 | */ |
3cb03002 | 1145 | static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 | 1146 | { |
1da177e4 LT |
1147 | mdp_super_t *sb; |
1148 | int ret; | |
228fc7d7 | 1149 | bool spare_disk = true; |
1da177e4 LT |
1150 | |
1151 | /* | |
0f420358 | 1152 | * Calculate the position of the superblock (512byte sectors), |
1da177e4 LT |
1153 | * it's at the end of the disk. |
1154 | * | |
1155 | * It also happens to be a multiple of 4Kb. | |
1156 | */ | |
57b2caa3 | 1157 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 1158 | |
0002b271 | 1159 | ret = read_disk_sb(rdev, MD_SB_BYTES); |
9d48739e N |
1160 | if (ret) |
1161 | return ret; | |
1da177e4 LT |
1162 | |
1163 | ret = -EINVAL; | |
1164 | ||
65a06f06 | 1165 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1166 | |
1167 | if (sb->md_magic != MD_SB_MAGIC) { | |
913cce5a CH |
1168 | pr_warn("md: invalid raid superblock magic on %pg\n", |
1169 | rdev->bdev); | |
1da177e4 LT |
1170 | goto abort; |
1171 | } | |
1172 | ||
1173 | if (sb->major_version != 0 || | |
f6705578 N |
1174 | sb->minor_version < 90 || |
1175 | sb->minor_version > 91) { | |
913cce5a CH |
1176 | pr_warn("Bad version number %d.%d on %pg\n", |
1177 | sb->major_version, sb->minor_version, rdev->bdev); | |
1da177e4 LT |
1178 | goto abort; |
1179 | } | |
1180 | ||
1181 | if (sb->raid_disks <= 0) | |
1182 | goto abort; | |
1183 | ||
4d167f09 | 1184 | if (md_csum_fold(calc_sb_csum(sb)) != md_csum_fold(sb->sb_csum)) { |
913cce5a | 1185 | pr_warn("md: invalid superblock checksum on %pg\n", rdev->bdev); |
1da177e4 LT |
1186 | goto abort; |
1187 | } | |
1188 | ||
1189 | rdev->preferred_minor = sb->md_minor; | |
1190 | rdev->data_offset = 0; | |
c6563a8c | 1191 | rdev->new_data_offset = 0; |
0002b271 | 1192 | rdev->sb_size = MD_SB_BYTES; |
9f2f3830 | 1193 | rdev->badblocks.shift = -1; |
1da177e4 LT |
1194 | |
1195 | if (sb->level == LEVEL_MULTIPATH) | |
1196 | rdev->desc_nr = -1; | |
1197 | else | |
1198 | rdev->desc_nr = sb->this_disk.number; | |
1199 | ||
228fc7d7 YY |
1200 | /* not spare disk, or LEVEL_MULTIPATH */ |
1201 | if (sb->level == LEVEL_MULTIPATH || | |
1202 | (rdev->desc_nr >= 0 && | |
3b7436cc | 1203 | rdev->desc_nr < MD_SB_DISKS && |
228fc7d7 YY |
1204 | sb->disks[rdev->desc_nr].state & |
1205 | ((1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE)))) | |
1206 | spare_disk = false; | |
1207 | ||
9a7b2b0f | 1208 | if (!refdev) { |
228fc7d7 | 1209 | if (!spare_disk) |
6a5cb53a YY |
1210 | ret = 1; |
1211 | else | |
1212 | ret = 0; | |
9a7b2b0f | 1213 | } else { |
1da177e4 | 1214 | __u64 ev1, ev2; |
65a06f06 | 1215 | mdp_super_t *refsb = page_address(refdev->sb_page); |
e6fd2093 | 1216 | if (!md_uuid_equal(refsb, sb)) { |
913cce5a CH |
1217 | pr_warn("md: %pg has different UUID to %pg\n", |
1218 | rdev->bdev, refdev->bdev); | |
1da177e4 LT |
1219 | goto abort; |
1220 | } | |
e6fd2093 | 1221 | if (!md_sb_equal(refsb, sb)) { |
913cce5a CH |
1222 | pr_warn("md: %pg has same UUID but different superblock to %pg\n", |
1223 | rdev->bdev, refdev->bdev); | |
1da177e4 LT |
1224 | goto abort; |
1225 | } | |
1226 | ev1 = md_event(sb); | |
1227 | ev2 = md_event(refsb); | |
6a5cb53a | 1228 | |
228fc7d7 | 1229 | if (!spare_disk && ev1 > ev2) |
1da177e4 | 1230 | ret = 1; |
f72ffdd6 | 1231 | else |
1da177e4 LT |
1232 | ret = 0; |
1233 | } | |
8190e754 | 1234 | rdev->sectors = rdev->sb_start; |
667a5313 N |
1235 | /* Limit to 4TB as metadata cannot record more than that. |
1236 | * (not needed for Linear and RAID0 as metadata doesn't | |
1237 | * record this size) | |
1238 | */ | |
72deb455 | 1239 | if ((u64)rdev->sectors >= (2ULL << 32) && sb->level >= 1) |
3312c951 | 1240 | rdev->sectors = (sector_t)(2ULL << 32) - 2; |
1da177e4 | 1241 | |
27a7b260 | 1242 | if (rdev->sectors < ((sector_t)sb->size) * 2 && sb->level >= 1) |
2bf071bf N |
1243 | /* "this cannot possibly happen" ... */ |
1244 | ret = -EINVAL; | |
1245 | ||
1da177e4 LT |
1246 | abort: |
1247 | return ret; | |
1248 | } | |
1249 | ||
1250 | /* | |
1251 | * validate_super for 0.90.0 | |
1252 | */ | |
fd01b88c | 1253 | static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1254 | { |
1255 | mdp_disk_t *desc; | |
65a06f06 | 1256 | mdp_super_t *sb = page_address(rdev->sb_page); |
07d84d10 | 1257 | __u64 ev1 = md_event(sb); |
1da177e4 | 1258 | |
41158c7e | 1259 | rdev->raid_disk = -1; |
c5d79adb N |
1260 | clear_bit(Faulty, &rdev->flags); |
1261 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1262 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1263 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1264 | |
1da177e4 LT |
1265 | if (mddev->raid_disks == 0) { |
1266 | mddev->major_version = 0; | |
1267 | mddev->minor_version = sb->minor_version; | |
1268 | mddev->patch_version = sb->patch_version; | |
e691063a | 1269 | mddev->external = 0; |
9d8f0363 | 1270 | mddev->chunk_sectors = sb->chunk_size >> 9; |
1da177e4 LT |
1271 | mddev->ctime = sb->ctime; |
1272 | mddev->utime = sb->utime; | |
1273 | mddev->level = sb->level; | |
d9d166c2 | 1274 | mddev->clevel[0] = 0; |
1da177e4 LT |
1275 | mddev->layout = sb->layout; |
1276 | mddev->raid_disks = sb->raid_disks; | |
27a7b260 | 1277 | mddev->dev_sectors = ((sector_t)sb->size) * 2; |
07d84d10 | 1278 | mddev->events = ev1; |
c3d9714e | 1279 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1280 | mddev->bitmap_info.space = 0; |
1281 | /* bitmap can use 60 K after the 4K superblocks */ | |
c3d9714e | 1282 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 1283 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
2c810cdd | 1284 | mddev->reshape_backwards = 0; |
1da177e4 | 1285 | |
f6705578 N |
1286 | if (mddev->minor_version >= 91) { |
1287 | mddev->reshape_position = sb->reshape_position; | |
1288 | mddev->delta_disks = sb->delta_disks; | |
1289 | mddev->new_level = sb->new_level; | |
1290 | mddev->new_layout = sb->new_layout; | |
664e7c41 | 1291 | mddev->new_chunk_sectors = sb->new_chunk >> 9; |
2c810cdd N |
1292 | if (mddev->delta_disks < 0) |
1293 | mddev->reshape_backwards = 1; | |
f6705578 N |
1294 | } else { |
1295 | mddev->reshape_position = MaxSector; | |
1296 | mddev->delta_disks = 0; | |
1297 | mddev->new_level = mddev->level; | |
1298 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1299 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 | 1300 | } |
33f2c35a N |
1301 | if (mddev->level == 0) |
1302 | mddev->layout = -1; | |
f6705578 | 1303 | |
1da177e4 LT |
1304 | if (sb->state & (1<<MD_SB_CLEAN)) |
1305 | mddev->recovery_cp = MaxSector; | |
1306 | else { | |
f72ffdd6 | 1307 | if (sb->events_hi == sb->cp_events_hi && |
1da177e4 LT |
1308 | sb->events_lo == sb->cp_events_lo) { |
1309 | mddev->recovery_cp = sb->recovery_cp; | |
1310 | } else | |
1311 | mddev->recovery_cp = 0; | |
1312 | } | |
1313 | ||
1314 | memcpy(mddev->uuid+0, &sb->set_uuid0, 4); | |
1315 | memcpy(mddev->uuid+4, &sb->set_uuid1, 4); | |
1316 | memcpy(mddev->uuid+8, &sb->set_uuid2, 4); | |
1317 | memcpy(mddev->uuid+12,&sb->set_uuid3, 4); | |
1318 | ||
1319 | mddev->max_disks = MD_SB_DISKS; | |
a654b9d8 N |
1320 | |
1321 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT) && | |
6409bb05 | 1322 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1323 | mddev->bitmap_info.offset = |
1324 | mddev->bitmap_info.default_offset; | |
6409bb05 | 1325 | mddev->bitmap_info.space = |
c9ad020f | 1326 | mddev->bitmap_info.default_space; |
6409bb05 | 1327 | } |
a654b9d8 | 1328 | |
41158c7e | 1329 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1330 | /* Insist on good event counter while assembling, except |
1331 | * for spares (which don't need an event count) */ | |
1da177e4 | 1332 | ++ev1; |
be6800a7 N |
1333 | if (sb->disks[rdev->desc_nr].state & ( |
1334 | (1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE))) | |
f72ffdd6 | 1335 | if (ev1 < mddev->events) |
be6800a7 | 1336 | return -EINVAL; |
41158c7e N |
1337 | } else if (mddev->bitmap) { |
1338 | /* if adding to array with a bitmap, then we can accept an | |
1339 | * older device ... but not too old. | |
1340 | */ | |
41158c7e N |
1341 | if (ev1 < mddev->bitmap->events_cleared) |
1342 | return 0; | |
8313b8e5 N |
1343 | if (ev1 < mddev->events) |
1344 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1345 | } else { |
1346 | if (ev1 < mddev->events) | |
1347 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1348 | return 0; | |
1349 | } | |
41158c7e | 1350 | |
1da177e4 | 1351 | if (mddev->level != LEVEL_MULTIPATH) { |
1da177e4 LT |
1352 | desc = sb->disks + rdev->desc_nr; |
1353 | ||
1354 | if (desc->state & (1<<MD_DISK_FAULTY)) | |
b2d444d7 | 1355 | set_bit(Faulty, &rdev->flags); |
7c7546cc N |
1356 | else if (desc->state & (1<<MD_DISK_SYNC) /* && |
1357 | desc->raid_disk < mddev->raid_disks */) { | |
b2d444d7 | 1358 | set_bit(In_sync, &rdev->flags); |
1da177e4 | 1359 | rdev->raid_disk = desc->raid_disk; |
f466722c | 1360 | rdev->saved_raid_disk = desc->raid_disk; |
0261cd9f N |
1361 | } else if (desc->state & (1<<MD_DISK_ACTIVE)) { |
1362 | /* active but not in sync implies recovery up to | |
1363 | * reshape position. We don't know exactly where | |
1364 | * that is, so set to zero for now */ | |
1365 | if (mddev->minor_version >= 91) { | |
1366 | rdev->recovery_offset = 0; | |
1367 | rdev->raid_disk = desc->raid_disk; | |
1368 | } | |
1da177e4 | 1369 | } |
8ddf9efe N |
1370 | if (desc->state & (1<<MD_DISK_WRITEMOSTLY)) |
1371 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1372 | if (desc->state & (1<<MD_DISK_FAILFAST)) |
1373 | set_bit(FailFast, &rdev->flags); | |
41158c7e | 1374 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1375 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1376 | return 0; |
1377 | } | |
1378 | ||
1379 | /* | |
1380 | * sync_super for 0.90.0 | |
1381 | */ | |
fd01b88c | 1382 | static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1383 | { |
1384 | mdp_super_t *sb; | |
3cb03002 | 1385 | struct md_rdev *rdev2; |
1da177e4 | 1386 | int next_spare = mddev->raid_disks; |
19133a42 | 1387 | |
1da177e4 LT |
1388 | /* make rdev->sb match mddev data.. |
1389 | * | |
1390 | * 1/ zero out disks | |
1391 | * 2/ Add info for each disk, keeping track of highest desc_nr (next_spare); | |
1392 | * 3/ any empty disks < next_spare become removed | |
1393 | * | |
1394 | * disks[0] gets initialised to REMOVED because | |
1395 | * we cannot be sure from other fields if it has | |
1396 | * been initialised or not. | |
1397 | */ | |
1398 | int i; | |
1399 | int active=0, working=0,failed=0,spare=0,nr_disks=0; | |
1400 | ||
61181565 N |
1401 | rdev->sb_size = MD_SB_BYTES; |
1402 | ||
65a06f06 | 1403 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1404 | |
1405 | memset(sb, 0, sizeof(*sb)); | |
1406 | ||
1407 | sb->md_magic = MD_SB_MAGIC; | |
1408 | sb->major_version = mddev->major_version; | |
1da177e4 LT |
1409 | sb->patch_version = mddev->patch_version; |
1410 | sb->gvalid_words = 0; /* ignored */ | |
1411 | memcpy(&sb->set_uuid0, mddev->uuid+0, 4); | |
1412 | memcpy(&sb->set_uuid1, mddev->uuid+4, 4); | |
1413 | memcpy(&sb->set_uuid2, mddev->uuid+8, 4); | |
1414 | memcpy(&sb->set_uuid3, mddev->uuid+12,4); | |
1415 | ||
9ebc6ef1 | 1416 | sb->ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 1417 | sb->level = mddev->level; |
58c0fed4 | 1418 | sb->size = mddev->dev_sectors / 2; |
1da177e4 LT |
1419 | sb->raid_disks = mddev->raid_disks; |
1420 | sb->md_minor = mddev->md_minor; | |
e691063a | 1421 | sb->not_persistent = 0; |
9ebc6ef1 | 1422 | sb->utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
1423 | sb->state = 0; |
1424 | sb->events_hi = (mddev->events>>32); | |
1425 | sb->events_lo = (u32)mddev->events; | |
1426 | ||
f6705578 N |
1427 | if (mddev->reshape_position == MaxSector) |
1428 | sb->minor_version = 90; | |
1429 | else { | |
1430 | sb->minor_version = 91; | |
1431 | sb->reshape_position = mddev->reshape_position; | |
1432 | sb->new_level = mddev->new_level; | |
1433 | sb->delta_disks = mddev->delta_disks; | |
1434 | sb->new_layout = mddev->new_layout; | |
664e7c41 | 1435 | sb->new_chunk = mddev->new_chunk_sectors << 9; |
f6705578 N |
1436 | } |
1437 | mddev->minor_version = sb->minor_version; | |
1da177e4 LT |
1438 | if (mddev->in_sync) |
1439 | { | |
1440 | sb->recovery_cp = mddev->recovery_cp; | |
1441 | sb->cp_events_hi = (mddev->events>>32); | |
1442 | sb->cp_events_lo = (u32)mddev->events; | |
1443 | if (mddev->recovery_cp == MaxSector) | |
1444 | sb->state = (1<< MD_SB_CLEAN); | |
1445 | } else | |
1446 | sb->recovery_cp = 0; | |
1447 | ||
1448 | sb->layout = mddev->layout; | |
9d8f0363 | 1449 | sb->chunk_size = mddev->chunk_sectors << 9; |
1da177e4 | 1450 | |
c3d9714e | 1451 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) |
a654b9d8 N |
1452 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); |
1453 | ||
1da177e4 | 1454 | sb->disks[0].state = (1<<MD_DISK_REMOVED); |
dafb20fa | 1455 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1456 | mdp_disk_t *d; |
86e6ffdd | 1457 | int desc_nr; |
0261cd9f N |
1458 | int is_active = test_bit(In_sync, &rdev2->flags); |
1459 | ||
1460 | if (rdev2->raid_disk >= 0 && | |
1461 | sb->minor_version >= 91) | |
1462 | /* we have nowhere to store the recovery_offset, | |
1463 | * but if it is not below the reshape_position, | |
1464 | * we can piggy-back on that. | |
1465 | */ | |
1466 | is_active = 1; | |
1467 | if (rdev2->raid_disk < 0 || | |
1468 | test_bit(Faulty, &rdev2->flags)) | |
1469 | is_active = 0; | |
1470 | if (is_active) | |
86e6ffdd | 1471 | desc_nr = rdev2->raid_disk; |
1da177e4 | 1472 | else |
86e6ffdd | 1473 | desc_nr = next_spare++; |
19133a42 | 1474 | rdev2->desc_nr = desc_nr; |
1da177e4 LT |
1475 | d = &sb->disks[rdev2->desc_nr]; |
1476 | nr_disks++; | |
1477 | d->number = rdev2->desc_nr; | |
1478 | d->major = MAJOR(rdev2->bdev->bd_dev); | |
1479 | d->minor = MINOR(rdev2->bdev->bd_dev); | |
0261cd9f | 1480 | if (is_active) |
1da177e4 LT |
1481 | d->raid_disk = rdev2->raid_disk; |
1482 | else | |
1483 | d->raid_disk = rdev2->desc_nr; /* compatibility */ | |
1be7892f | 1484 | if (test_bit(Faulty, &rdev2->flags)) |
1da177e4 | 1485 | d->state = (1<<MD_DISK_FAULTY); |
0261cd9f | 1486 | else if (is_active) { |
1da177e4 | 1487 | d->state = (1<<MD_DISK_ACTIVE); |
0261cd9f N |
1488 | if (test_bit(In_sync, &rdev2->flags)) |
1489 | d->state |= (1<<MD_DISK_SYNC); | |
1da177e4 LT |
1490 | active++; |
1491 | working++; | |
1492 | } else { | |
1493 | d->state = 0; | |
1494 | spare++; | |
1495 | working++; | |
1496 | } | |
8ddf9efe N |
1497 | if (test_bit(WriteMostly, &rdev2->flags)) |
1498 | d->state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
1499 | if (test_bit(FailFast, &rdev2->flags)) |
1500 | d->state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 | 1501 | } |
1da177e4 LT |
1502 | /* now set the "removed" and "faulty" bits on any missing devices */ |
1503 | for (i=0 ; i < mddev->raid_disks ; i++) { | |
1504 | mdp_disk_t *d = &sb->disks[i]; | |
1505 | if (d->state == 0 && d->number == 0) { | |
1506 | d->number = i; | |
1507 | d->raid_disk = i; | |
1508 | d->state = (1<<MD_DISK_REMOVED); | |
1509 | d->state |= (1<<MD_DISK_FAULTY); | |
1510 | failed++; | |
1511 | } | |
1512 | } | |
1513 | sb->nr_disks = nr_disks; | |
1514 | sb->active_disks = active; | |
1515 | sb->working_disks = working; | |
1516 | sb->failed_disks = failed; | |
1517 | sb->spare_disks = spare; | |
1518 | ||
1519 | sb->this_disk = sb->disks[rdev->desc_nr]; | |
1520 | sb->sb_csum = calc_sb_csum(sb); | |
1521 | } | |
1522 | ||
0cd17fec CW |
1523 | /* |
1524 | * rdev_size_change for 0.90.0 | |
1525 | */ | |
1526 | static unsigned long long | |
3cb03002 | 1527 | super_90_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec | 1528 | { |
58c0fed4 | 1529 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1530 | return 0; /* component must fit device */ |
c3d9714e | 1531 | if (rdev->mddev->bitmap_info.offset) |
0cd17fec | 1532 | return 0; /* can't move bitmap */ |
57b2caa3 | 1533 | rdev->sb_start = calc_dev_sboffset(rdev); |
15f4a5fd AN |
1534 | if (!num_sectors || num_sectors > rdev->sb_start) |
1535 | num_sectors = rdev->sb_start; | |
27a7b260 N |
1536 | /* Limit to 4TB as metadata cannot record more than that. |
1537 | * 4TB == 2^32 KB, or 2*2^32 sectors. | |
1538 | */ | |
72deb455 | 1539 | if ((u64)num_sectors >= (2ULL << 32) && rdev->mddev->level >= 1) |
3312c951 | 1540 | num_sectors = (sector_t)(2ULL << 32) - 2; |
46533ff7 N |
1541 | do { |
1542 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
0cd17fec | 1543 | rdev->sb_page); |
46533ff7 | 1544 | } while (md_super_wait(rdev->mddev) < 0); |
c26a44ed | 1545 | return num_sectors; |
0cd17fec CW |
1546 | } |
1547 | ||
c6563a8c N |
1548 | static int |
1549 | super_90_allow_new_offset(struct md_rdev *rdev, unsigned long long new_offset) | |
1550 | { | |
1551 | /* non-zero offset changes not possible with v0.90 */ | |
1552 | return new_offset == 0; | |
1553 | } | |
0cd17fec | 1554 | |
1da177e4 LT |
1555 | /* |
1556 | * version 1 superblock | |
1557 | */ | |
1558 | ||
f72ffdd6 | 1559 | static __le32 calc_sb_1_csum(struct mdp_superblock_1 *sb) |
1da177e4 | 1560 | { |
1c05b4bc N |
1561 | __le32 disk_csum; |
1562 | u32 csum; | |
1da177e4 LT |
1563 | unsigned long long newcsum; |
1564 | int size = 256 + le32_to_cpu(sb->max_dev)*2; | |
1c05b4bc | 1565 | __le32 *isuper = (__le32*)sb; |
1da177e4 LT |
1566 | |
1567 | disk_csum = sb->sb_csum; | |
1568 | sb->sb_csum = 0; | |
1569 | newcsum = 0; | |
1f3c9907 | 1570 | for (; size >= 4; size -= 4) |
1da177e4 LT |
1571 | newcsum += le32_to_cpu(*isuper++); |
1572 | ||
1573 | if (size == 2) | |
1c05b4bc | 1574 | newcsum += le16_to_cpu(*(__le16*) isuper); |
1da177e4 LT |
1575 | |
1576 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
1577 | sb->sb_csum = disk_csum; | |
1578 | return cpu_to_le32(csum); | |
1579 | } | |
1580 | ||
3cb03002 | 1581 | static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1582 | { |
1583 | struct mdp_superblock_1 *sb; | |
1584 | int ret; | |
0f420358 | 1585 | sector_t sb_start; |
c6563a8c | 1586 | sector_t sectors; |
0002b271 | 1587 | int bmask; |
228fc7d7 | 1588 | bool spare_disk = true; |
1da177e4 LT |
1589 | |
1590 | /* | |
0f420358 | 1591 | * Calculate the position of the superblock in 512byte sectors. |
1da177e4 LT |
1592 | * It is always aligned to a 4K boundary and |
1593 | * depeding on minor_version, it can be: | |
1594 | * 0: At least 8K, but less than 12K, from end of device | |
1595 | * 1: At start of device | |
1596 | * 2: 4K from start of device. | |
1597 | */ | |
1598 | switch(minor_version) { | |
1599 | case 0: | |
0fe80347 | 1600 | sb_start = bdev_nr_sectors(rdev->bdev) - 8 * 2; |
0f420358 | 1601 | sb_start &= ~(sector_t)(4*2-1); |
1da177e4 LT |
1602 | break; |
1603 | case 1: | |
0f420358 | 1604 | sb_start = 0; |
1da177e4 LT |
1605 | break; |
1606 | case 2: | |
0f420358 | 1607 | sb_start = 8; |
1da177e4 LT |
1608 | break; |
1609 | default: | |
1610 | return -EINVAL; | |
1611 | } | |
0f420358 | 1612 | rdev->sb_start = sb_start; |
1da177e4 | 1613 | |
0002b271 N |
1614 | /* superblock is rarely larger than 1K, but it can be larger, |
1615 | * and it is safe to read 4k, so we do that | |
1616 | */ | |
1617 | ret = read_disk_sb(rdev, 4096); | |
1da177e4 LT |
1618 | if (ret) return ret; |
1619 | ||
65a06f06 | 1620 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1621 | |
1622 | if (sb->magic != cpu_to_le32(MD_SB_MAGIC) || | |
1623 | sb->major_version != cpu_to_le32(1) || | |
1624 | le32_to_cpu(sb->max_dev) > (4096-256)/2 || | |
0f420358 | 1625 | le64_to_cpu(sb->super_offset) != rdev->sb_start || |
71c0805c | 1626 | (le32_to_cpu(sb->feature_map) & ~MD_FEATURE_ALL) != 0) |
1da177e4 LT |
1627 | return -EINVAL; |
1628 | ||
1629 | if (calc_sb_1_csum(sb) != sb->sb_csum) { | |
913cce5a CH |
1630 | pr_warn("md: invalid superblock checksum on %pg\n", |
1631 | rdev->bdev); | |
1da177e4 LT |
1632 | return -EINVAL; |
1633 | } | |
1634 | if (le64_to_cpu(sb->data_size) < 10) { | |
913cce5a CH |
1635 | pr_warn("md: data_size too small on %pg\n", |
1636 | rdev->bdev); | |
1da177e4 LT |
1637 | return -EINVAL; |
1638 | } | |
c6563a8c N |
1639 | if (sb->pad0 || |
1640 | sb->pad3[0] || | |
1641 | memcmp(sb->pad3, sb->pad3+1, sizeof(sb->pad3) - sizeof(sb->pad3[1]))) | |
1642 | /* Some padding is non-zero, might be a new feature */ | |
1643 | return -EINVAL; | |
e11e93fa | 1644 | |
1da177e4 LT |
1645 | rdev->preferred_minor = 0xffff; |
1646 | rdev->data_offset = le64_to_cpu(sb->data_offset); | |
c6563a8c N |
1647 | rdev->new_data_offset = rdev->data_offset; |
1648 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE) && | |
1649 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) | |
1650 | rdev->new_data_offset += (s32)le32_to_cpu(sb->new_offset); | |
4dbcdc75 | 1651 | atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read)); |
1da177e4 | 1652 | |
0002b271 | 1653 | rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256; |
e1defc4f | 1654 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; |
0002b271 | 1655 | if (rdev->sb_size & bmask) |
a1801f85 N |
1656 | rdev->sb_size = (rdev->sb_size | bmask) + 1; |
1657 | ||
1658 | if (minor_version | |
0f420358 | 1659 | && rdev->data_offset < sb_start + (rdev->sb_size/512)) |
a1801f85 | 1660 | return -EINVAL; |
c6563a8c N |
1661 | if (minor_version |
1662 | && rdev->new_data_offset < sb_start + (rdev->sb_size/512)) | |
1663 | return -EINVAL; | |
0002b271 | 1664 | |
31b65a0d N |
1665 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH)) |
1666 | rdev->desc_nr = -1; | |
1667 | else | |
1668 | rdev->desc_nr = le32_to_cpu(sb->dev_number); | |
1669 | ||
2699b672 N |
1670 | if (!rdev->bb_page) { |
1671 | rdev->bb_page = alloc_page(GFP_KERNEL); | |
1672 | if (!rdev->bb_page) | |
1673 | return -ENOMEM; | |
1674 | } | |
1675 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BAD_BLOCKS) && | |
1676 | rdev->badblocks.count == 0) { | |
1677 | /* need to load the bad block list. | |
1678 | * Currently we limit it to one page. | |
1679 | */ | |
1680 | s32 offset; | |
1681 | sector_t bb_sector; | |
00485d09 | 1682 | __le64 *bbp; |
2699b672 N |
1683 | int i; |
1684 | int sectors = le16_to_cpu(sb->bblog_size); | |
1685 | if (sectors > (PAGE_SIZE / 512)) | |
1686 | return -EINVAL; | |
1687 | offset = le32_to_cpu(sb->bblog_offset); | |
1688 | if (offset == 0) | |
1689 | return -EINVAL; | |
1690 | bb_sector = (long long)offset; | |
1691 | if (!sync_page_io(rdev, bb_sector, sectors << 9, | |
4ce4c73f | 1692 | rdev->bb_page, REQ_OP_READ, true)) |
2699b672 | 1693 | return -EIO; |
00485d09 | 1694 | bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
1695 | rdev->badblocks.shift = sb->bblog_shift; |
1696 | for (i = 0 ; i < (sectors << (9-3)) ; i++, bbp++) { | |
1697 | u64 bb = le64_to_cpu(*bbp); | |
1698 | int count = bb & (0x3ff); | |
1699 | u64 sector = bb >> 10; | |
1700 | sector <<= sb->bblog_shift; | |
1701 | count <<= sb->bblog_shift; | |
1702 | if (bb + 1 == 0) | |
1703 | break; | |
fc974ee2 | 1704 | if (badblocks_set(&rdev->badblocks, sector, count, 1)) |
2699b672 N |
1705 | return -EINVAL; |
1706 | } | |
486adf72 N |
1707 | } else if (sb->bblog_offset != 0) |
1708 | rdev->badblocks.shift = 0; | |
2699b672 | 1709 | |
ddc08823 PB |
1710 | if ((le32_to_cpu(sb->feature_map) & |
1711 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS))) { | |
ea0213e0 AP |
1712 | rdev->ppl.offset = (__s16)le16_to_cpu(sb->ppl.offset); |
1713 | rdev->ppl.size = le16_to_cpu(sb->ppl.size); | |
1714 | rdev->ppl.sector = rdev->sb_start + rdev->ppl.offset; | |
1715 | } | |
1716 | ||
33f2c35a N |
1717 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT) && |
1718 | sb->level != 0) | |
1719 | return -EINVAL; | |
1720 | ||
228fc7d7 YY |
1721 | /* not spare disk, or LEVEL_MULTIPATH */ |
1722 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH) || | |
1723 | (rdev->desc_nr >= 0 && | |
1724 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
1725 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || | |
1726 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL))) | |
1727 | spare_disk = false; | |
6a5cb53a | 1728 | |
9a7b2b0f | 1729 | if (!refdev) { |
228fc7d7 | 1730 | if (!spare_disk) |
6a5cb53a YY |
1731 | ret = 1; |
1732 | else | |
1733 | ret = 0; | |
9a7b2b0f | 1734 | } else { |
1da177e4 | 1735 | __u64 ev1, ev2; |
65a06f06 | 1736 | struct mdp_superblock_1 *refsb = page_address(refdev->sb_page); |
1da177e4 LT |
1737 | |
1738 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16) != 0 || | |
1739 | sb->level != refsb->level || | |
1740 | sb->layout != refsb->layout || | |
1741 | sb->chunksize != refsb->chunksize) { | |
913cce5a CH |
1742 | pr_warn("md: %pg has strangely different superblock to %pg\n", |
1743 | rdev->bdev, | |
1744 | refdev->bdev); | |
1da177e4 LT |
1745 | return -EINVAL; |
1746 | } | |
1747 | ev1 = le64_to_cpu(sb->events); | |
1748 | ev2 = le64_to_cpu(refsb->events); | |
1749 | ||
228fc7d7 | 1750 | if (!spare_disk && ev1 > ev2) |
8ed75463 N |
1751 | ret = 1; |
1752 | else | |
1753 | ret = 0; | |
1da177e4 | 1754 | } |
0fe80347 CH |
1755 | if (minor_version) |
1756 | sectors = bdev_nr_sectors(rdev->bdev) - rdev->data_offset; | |
1757 | else | |
c6563a8c N |
1758 | sectors = rdev->sb_start; |
1759 | if (sectors < le64_to_cpu(sb->data_size)) | |
1da177e4 | 1760 | return -EINVAL; |
dd8ac336 | 1761 | rdev->sectors = le64_to_cpu(sb->data_size); |
8ed75463 | 1762 | return ret; |
1da177e4 LT |
1763 | } |
1764 | ||
fd01b88c | 1765 | static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 1766 | { |
65a06f06 | 1767 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
07d84d10 | 1768 | __u64 ev1 = le64_to_cpu(sb->events); |
1da177e4 | 1769 | |
41158c7e | 1770 | rdev->raid_disk = -1; |
c5d79adb N |
1771 | clear_bit(Faulty, &rdev->flags); |
1772 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1773 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1774 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1775 | |
1da177e4 LT |
1776 | if (mddev->raid_disks == 0) { |
1777 | mddev->major_version = 1; | |
1778 | mddev->patch_version = 0; | |
e691063a | 1779 | mddev->external = 0; |
9d8f0363 | 1780 | mddev->chunk_sectors = le32_to_cpu(sb->chunksize); |
9ebc6ef1 DD |
1781 | mddev->ctime = le64_to_cpu(sb->ctime); |
1782 | mddev->utime = le64_to_cpu(sb->utime); | |
1da177e4 | 1783 | mddev->level = le32_to_cpu(sb->level); |
d9d166c2 | 1784 | mddev->clevel[0] = 0; |
1da177e4 LT |
1785 | mddev->layout = le32_to_cpu(sb->layout); |
1786 | mddev->raid_disks = le32_to_cpu(sb->raid_disks); | |
58c0fed4 | 1787 | mddev->dev_sectors = le64_to_cpu(sb->size); |
07d84d10 | 1788 | mddev->events = ev1; |
c3d9714e | 1789 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1790 | mddev->bitmap_info.space = 0; |
1791 | /* Default location for bitmap is 1K after superblock | |
1792 | * using 3K - total of 4K | |
1793 | */ | |
c3d9714e | 1794 | mddev->bitmap_info.default_offset = 1024 >> 9; |
6409bb05 | 1795 | mddev->bitmap_info.default_space = (4096-1024) >> 9; |
2c810cdd N |
1796 | mddev->reshape_backwards = 0; |
1797 | ||
1da177e4 LT |
1798 | mddev->recovery_cp = le64_to_cpu(sb->resync_offset); |
1799 | memcpy(mddev->uuid, sb->set_uuid, 16); | |
1800 | ||
1801 | mddev->max_disks = (4096-256)/2; | |
a654b9d8 | 1802 | |
71c0805c | 1803 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) && |
6409bb05 | 1804 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1805 | mddev->bitmap_info.offset = |
1806 | (__s32)le32_to_cpu(sb->bitmap_offset); | |
6409bb05 N |
1807 | /* Metadata doesn't record how much space is available. |
1808 | * For 1.0, we assume we can use up to the superblock | |
1809 | * if before, else to 4K beyond superblock. | |
1810 | * For others, assume no change is possible. | |
1811 | */ | |
1812 | if (mddev->minor_version > 0) | |
1813 | mddev->bitmap_info.space = 0; | |
1814 | else if (mddev->bitmap_info.offset > 0) | |
1815 | mddev->bitmap_info.space = | |
1816 | 8 - mddev->bitmap_info.offset; | |
1817 | else | |
1818 | mddev->bitmap_info.space = | |
1819 | -mddev->bitmap_info.offset; | |
1820 | } | |
e11e93fa | 1821 | |
f6705578 N |
1822 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { |
1823 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); | |
1824 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); | |
1825 | mddev->new_level = le32_to_cpu(sb->new_level); | |
1826 | mddev->new_layout = le32_to_cpu(sb->new_layout); | |
664e7c41 | 1827 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_chunk); |
2c810cdd N |
1828 | if (mddev->delta_disks < 0 || |
1829 | (mddev->delta_disks == 0 && | |
1830 | (le32_to_cpu(sb->feature_map) | |
1831 | & MD_FEATURE_RESHAPE_BACKWARDS))) | |
1832 | mddev->reshape_backwards = 1; | |
f6705578 N |
1833 | } else { |
1834 | mddev->reshape_position = MaxSector; | |
1835 | mddev->delta_disks = 0; | |
1836 | mddev->new_level = mddev->level; | |
1837 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1838 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1839 | } |
1840 | ||
33f2c35a N |
1841 | if (mddev->level == 0 && |
1842 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT)) | |
1843 | mddev->layout = -1; | |
1844 | ||
486b0f7b | 1845 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL) |
a62ab49e | 1846 | set_bit(MD_HAS_JOURNAL, &mddev->flags); |
ea0213e0 | 1847 | |
ddc08823 PB |
1848 | if (le32_to_cpu(sb->feature_map) & |
1849 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS)) { | |
ea0213e0 AP |
1850 | if (le32_to_cpu(sb->feature_map) & |
1851 | (MD_FEATURE_BITMAP_OFFSET | MD_FEATURE_JOURNAL)) | |
1852 | return -EINVAL; | |
ddc08823 PB |
1853 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_PPL) && |
1854 | (le32_to_cpu(sb->feature_map) & | |
1855 | MD_FEATURE_MULTIPLE_PPLS)) | |
1856 | return -EINVAL; | |
ea0213e0 AP |
1857 | set_bit(MD_HAS_PPL, &mddev->flags); |
1858 | } | |
41158c7e | 1859 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1860 | /* Insist of good event counter while assembling, except for |
1861 | * spares (which don't need an event count) */ | |
1da177e4 | 1862 | ++ev1; |
be6800a7 N |
1863 | if (rdev->desc_nr >= 0 && |
1864 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
a3dfbdaa SL |
1865 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || |
1866 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL)) | |
be6800a7 N |
1867 | if (ev1 < mddev->events) |
1868 | return -EINVAL; | |
41158c7e N |
1869 | } else if (mddev->bitmap) { |
1870 | /* If adding to array with a bitmap, then we can accept an | |
1871 | * older device, but not too old. | |
1872 | */ | |
41158c7e N |
1873 | if (ev1 < mddev->bitmap->events_cleared) |
1874 | return 0; | |
8313b8e5 N |
1875 | if (ev1 < mddev->events) |
1876 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1877 | } else { |
1878 | if (ev1 < mddev->events) | |
1879 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1880 | return 0; | |
1881 | } | |
1da177e4 LT |
1882 | if (mddev->level != LEVEL_MULTIPATH) { |
1883 | int role; | |
3673f305 N |
1884 | if (rdev->desc_nr < 0 || |
1885 | rdev->desc_nr >= le32_to_cpu(sb->max_dev)) { | |
c4d4c91b | 1886 | role = MD_DISK_ROLE_SPARE; |
3673f305 N |
1887 | rdev->desc_nr = -1; |
1888 | } else | |
1889 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
1da177e4 | 1890 | switch(role) { |
c4d4c91b | 1891 | case MD_DISK_ROLE_SPARE: /* spare */ |
1da177e4 | 1892 | break; |
c4d4c91b | 1893 | case MD_DISK_ROLE_FAULTY: /* faulty */ |
b2d444d7 | 1894 | set_bit(Faulty, &rdev->flags); |
1da177e4 | 1895 | break; |
bac624f3 SL |
1896 | case MD_DISK_ROLE_JOURNAL: /* journal device */ |
1897 | if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL)) { | |
1898 | /* journal device without journal feature */ | |
9d48739e | 1899 | pr_warn("md: journal device provided without journal feature, ignoring the device\n"); |
bac624f3 SL |
1900 | return -EINVAL; |
1901 | } | |
1902 | set_bit(Journal, &rdev->flags); | |
3069aa8d | 1903 | rdev->journal_tail = le64_to_cpu(sb->journal_tail); |
9b15603d | 1904 | rdev->raid_disk = 0; |
bac624f3 | 1905 | break; |
1da177e4 | 1906 | default: |
f466722c | 1907 | rdev->saved_raid_disk = role; |
5fd6c1dc | 1908 | if ((le32_to_cpu(sb->feature_map) & |
f466722c | 1909 | MD_FEATURE_RECOVERY_OFFSET)) { |
5fd6c1dc | 1910 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); |
f466722c N |
1911 | if (!(le32_to_cpu(sb->feature_map) & |
1912 | MD_FEATURE_RECOVERY_BITMAP)) | |
1913 | rdev->saved_raid_disk = -1; | |
062f5b2a GJ |
1914 | } else { |
1915 | /* | |
1916 | * If the array is FROZEN, then the device can't | |
1917 | * be in_sync with rest of array. | |
1918 | */ | |
1919 | if (!test_bit(MD_RECOVERY_FROZEN, | |
1920 | &mddev->recovery)) | |
1921 | set_bit(In_sync, &rdev->flags); | |
1922 | } | |
1da177e4 LT |
1923 | rdev->raid_disk = role; |
1924 | break; | |
1925 | } | |
8ddf9efe N |
1926 | if (sb->devflags & WriteMostly1) |
1927 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1928 | if (sb->devflags & FailFast1) |
1929 | set_bit(FailFast, &rdev->flags); | |
2d78f8c4 N |
1930 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) |
1931 | set_bit(Replacement, &rdev->flags); | |
41158c7e | 1932 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1933 | set_bit(In_sync, &rdev->flags); |
41158c7e | 1934 | |
1da177e4 LT |
1935 | return 0; |
1936 | } | |
1937 | ||
fd01b88c | 1938 | static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1939 | { |
1940 | struct mdp_superblock_1 *sb; | |
3cb03002 | 1941 | struct md_rdev *rdev2; |
1da177e4 LT |
1942 | int max_dev, i; |
1943 | /* make rdev->sb match mddev and rdev data. */ | |
1944 | ||
65a06f06 | 1945 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1946 | |
1947 | sb->feature_map = 0; | |
1948 | sb->pad0 = 0; | |
5fd6c1dc | 1949 | sb->recovery_offset = cpu_to_le64(0); |
1da177e4 LT |
1950 | memset(sb->pad3, 0, sizeof(sb->pad3)); |
1951 | ||
1952 | sb->utime = cpu_to_le64((__u64)mddev->utime); | |
1953 | sb->events = cpu_to_le64(mddev->events); | |
1954 | if (mddev->in_sync) | |
1955 | sb->resync_offset = cpu_to_le64(mddev->recovery_cp); | |
bd18f646 SL |
1956 | else if (test_bit(MD_JOURNAL_CLEAN, &mddev->flags)) |
1957 | sb->resync_offset = cpu_to_le64(MaxSector); | |
1da177e4 LT |
1958 | else |
1959 | sb->resync_offset = cpu_to_le64(0); | |
1960 | ||
1c05b4bc | 1961 | sb->cnt_corrected_read = cpu_to_le32(atomic_read(&rdev->corrected_errors)); |
4dbcdc75 | 1962 | |
f0ca340c | 1963 | sb->raid_disks = cpu_to_le32(mddev->raid_disks); |
58c0fed4 | 1964 | sb->size = cpu_to_le64(mddev->dev_sectors); |
9d8f0363 | 1965 | sb->chunksize = cpu_to_le32(mddev->chunk_sectors); |
62e1e389 N |
1966 | sb->level = cpu_to_le32(mddev->level); |
1967 | sb->layout = cpu_to_le32(mddev->layout); | |
688834e6 N |
1968 | if (test_bit(FailFast, &rdev->flags)) |
1969 | sb->devflags |= FailFast1; | |
1970 | else | |
1971 | sb->devflags &= ~FailFast1; | |
f0ca340c | 1972 | |
aeb9b211 N |
1973 | if (test_bit(WriteMostly, &rdev->flags)) |
1974 | sb->devflags |= WriteMostly1; | |
1975 | else | |
1976 | sb->devflags &= ~WriteMostly1; | |
c6563a8c N |
1977 | sb->data_offset = cpu_to_le64(rdev->data_offset); |
1978 | sb->data_size = cpu_to_le64(rdev->sectors); | |
aeb9b211 | 1979 | |
c3d9714e N |
1980 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) { |
1981 | sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset); | |
71c0805c | 1982 | sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); |
a654b9d8 | 1983 | } |
5fd6c1dc | 1984 | |
f2076e7d | 1985 | if (rdev->raid_disk >= 0 && !test_bit(Journal, &rdev->flags) && |
97e4f42d | 1986 | !test_bit(In_sync, &rdev->flags)) { |
93be75ff N |
1987 | sb->feature_map |= |
1988 | cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET); | |
1989 | sb->recovery_offset = | |
1990 | cpu_to_le64(rdev->recovery_offset); | |
f466722c N |
1991 | if (rdev->saved_raid_disk >= 0 && mddev->bitmap) |
1992 | sb->feature_map |= | |
1993 | cpu_to_le32(MD_FEATURE_RECOVERY_BITMAP); | |
5fd6c1dc | 1994 | } |
3069aa8d SL |
1995 | /* Note: recovery_offset and journal_tail share space */ |
1996 | if (test_bit(Journal, &rdev->flags)) | |
1997 | sb->journal_tail = cpu_to_le64(rdev->journal_tail); | |
2d78f8c4 N |
1998 | if (test_bit(Replacement, &rdev->flags)) |
1999 | sb->feature_map |= | |
2000 | cpu_to_le32(MD_FEATURE_REPLACEMENT); | |
5fd6c1dc | 2001 | |
f6705578 N |
2002 | if (mddev->reshape_position != MaxSector) { |
2003 | sb->feature_map |= cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); | |
2004 | sb->reshape_position = cpu_to_le64(mddev->reshape_position); | |
2005 | sb->new_layout = cpu_to_le32(mddev->new_layout); | |
2006 | sb->delta_disks = cpu_to_le32(mddev->delta_disks); | |
2007 | sb->new_level = cpu_to_le32(mddev->new_level); | |
664e7c41 | 2008 | sb->new_chunk = cpu_to_le32(mddev->new_chunk_sectors); |
2c810cdd N |
2009 | if (mddev->delta_disks == 0 && |
2010 | mddev->reshape_backwards) | |
2011 | sb->feature_map | |
2012 | |= cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS); | |
c6563a8c N |
2013 | if (rdev->new_data_offset != rdev->data_offset) { |
2014 | sb->feature_map | |
2015 | |= cpu_to_le32(MD_FEATURE_NEW_OFFSET); | |
2016 | sb->new_offset = cpu_to_le32((__u32)(rdev->new_data_offset | |
2017 | - rdev->data_offset)); | |
2018 | } | |
f6705578 | 2019 | } |
a654b9d8 | 2020 | |
3c462c88 GR |
2021 | if (mddev_is_clustered(mddev)) |
2022 | sb->feature_map |= cpu_to_le32(MD_FEATURE_CLUSTERED); | |
2023 | ||
2699b672 N |
2024 | if (rdev->badblocks.count == 0) |
2025 | /* Nothing to do for bad blocks*/ ; | |
2026 | else if (sb->bblog_offset == 0) | |
2027 | /* Cannot record bad blocks on this device */ | |
2028 | md_error(mddev, rdev); | |
2029 | else { | |
2030 | struct badblocks *bb = &rdev->badblocks; | |
ae50640b | 2031 | __le64 *bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
2032 | u64 *p = bb->page; |
2033 | sb->feature_map |= cpu_to_le32(MD_FEATURE_BAD_BLOCKS); | |
2034 | if (bb->changed) { | |
2035 | unsigned seq; | |
2036 | ||
2037 | retry: | |
2038 | seq = read_seqbegin(&bb->lock); | |
2039 | ||
2040 | memset(bbp, 0xff, PAGE_SIZE); | |
2041 | ||
2042 | for (i = 0 ; i < bb->count ; i++) { | |
35f9ac2d | 2043 | u64 internal_bb = p[i]; |
2699b672 N |
2044 | u64 store_bb = ((BB_OFFSET(internal_bb) << 10) |
2045 | | BB_LEN(internal_bb)); | |
35f9ac2d | 2046 | bbp[i] = cpu_to_le64(store_bb); |
2699b672 | 2047 | } |
d0962936 | 2048 | bb->changed = 0; |
2699b672 N |
2049 | if (read_seqretry(&bb->lock, seq)) |
2050 | goto retry; | |
2051 | ||
2052 | bb->sector = (rdev->sb_start + | |
2053 | (int)le32_to_cpu(sb->bblog_offset)); | |
2054 | bb->size = le16_to_cpu(sb->bblog_size); | |
2699b672 N |
2055 | } |
2056 | } | |
2057 | ||
1da177e4 | 2058 | max_dev = 0; |
dafb20fa | 2059 | rdev_for_each(rdev2, mddev) |
1da177e4 LT |
2060 | if (rdev2->desc_nr+1 > max_dev) |
2061 | max_dev = rdev2->desc_nr+1; | |
a778b73f | 2062 | |
70471daf N |
2063 | if (max_dev > le32_to_cpu(sb->max_dev)) { |
2064 | int bmask; | |
a778b73f | 2065 | sb->max_dev = cpu_to_le32(max_dev); |
70471daf N |
2066 | rdev->sb_size = max_dev * 2 + 256; |
2067 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; | |
2068 | if (rdev->sb_size & bmask) | |
2069 | rdev->sb_size = (rdev->sb_size | bmask) + 1; | |
ddcf3522 N |
2070 | } else |
2071 | max_dev = le32_to_cpu(sb->max_dev); | |
2072 | ||
1da177e4 | 2073 | for (i=0; i<max_dev;i++) |
8df72024 | 2074 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
f72ffdd6 | 2075 | |
a97b7896 SL |
2076 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) |
2077 | sb->feature_map |= cpu_to_le32(MD_FEATURE_JOURNAL); | |
f72ffdd6 | 2078 | |
ea0213e0 | 2079 | if (test_bit(MD_HAS_PPL, &mddev->flags)) { |
ddc08823 PB |
2080 | if (test_bit(MD_HAS_MULTIPLE_PPLS, &mddev->flags)) |
2081 | sb->feature_map |= | |
2082 | cpu_to_le32(MD_FEATURE_MULTIPLE_PPLS); | |
2083 | else | |
2084 | sb->feature_map |= cpu_to_le32(MD_FEATURE_PPL); | |
ea0213e0 AP |
2085 | sb->ppl.offset = cpu_to_le16(rdev->ppl.offset); |
2086 | sb->ppl.size = cpu_to_le16(rdev->ppl.size); | |
2087 | } | |
2088 | ||
dafb20fa | 2089 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 2090 | i = rdev2->desc_nr; |
b2d444d7 | 2091 | if (test_bit(Faulty, &rdev2->flags)) |
c4d4c91b | 2092 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY); |
b2d444d7 | 2093 | else if (test_bit(In_sync, &rdev2->flags)) |
1da177e4 | 2094 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
a97b7896 | 2095 | else if (test_bit(Journal, &rdev2->flags)) |
bac624f3 | 2096 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_JOURNAL); |
93be75ff | 2097 | else if (rdev2->raid_disk >= 0) |
5fd6c1dc | 2098 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
1da177e4 | 2099 | else |
c4d4c91b | 2100 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
1da177e4 LT |
2101 | } |
2102 | ||
1da177e4 LT |
2103 | sb->sb_csum = calc_sb_1_csum(sb); |
2104 | } | |
2105 | ||
d9c0fa50 XN |
2106 | static sector_t super_1_choose_bm_space(sector_t dev_size) |
2107 | { | |
2108 | sector_t bm_space; | |
2109 | ||
2110 | /* if the device is bigger than 8Gig, save 64k for bitmap | |
2111 | * usage, if bigger than 200Gig, save 128k | |
2112 | */ | |
2113 | if (dev_size < 64*2) | |
2114 | bm_space = 0; | |
2115 | else if (dev_size - 64*2 >= 200*1024*1024*2) | |
2116 | bm_space = 128*2; | |
2117 | else if (dev_size - 4*2 > 8*1024*1024*2) | |
2118 | bm_space = 64*2; | |
2119 | else | |
2120 | bm_space = 4*2; | |
2121 | return bm_space; | |
2122 | } | |
2123 | ||
0cd17fec | 2124 | static unsigned long long |
3cb03002 | 2125 | super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec CW |
2126 | { |
2127 | struct mdp_superblock_1 *sb; | |
15f4a5fd | 2128 | sector_t max_sectors; |
58c0fed4 | 2129 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 2130 | return 0; /* component must fit device */ |
c6563a8c N |
2131 | if (rdev->data_offset != rdev->new_data_offset) |
2132 | return 0; /* too confusing */ | |
0f420358 | 2133 | if (rdev->sb_start < rdev->data_offset) { |
0cd17fec | 2134 | /* minor versions 1 and 2; superblock before data */ |
0fe80347 | 2135 | max_sectors = bdev_nr_sectors(rdev->bdev) - rdev->data_offset; |
15f4a5fd AN |
2136 | if (!num_sectors || num_sectors > max_sectors) |
2137 | num_sectors = max_sectors; | |
c3d9714e | 2138 | } else if (rdev->mddev->bitmap_info.offset) { |
0cd17fec CW |
2139 | /* minor version 0 with bitmap we can't move */ |
2140 | return 0; | |
2141 | } else { | |
2142 | /* minor version 0; superblock after data */ | |
d9c0fa50 | 2143 | sector_t sb_start, bm_space; |
0fe80347 | 2144 | sector_t dev_size = bdev_nr_sectors(rdev->bdev); |
d9c0fa50 XN |
2145 | |
2146 | /* 8K is for superblock */ | |
2147 | sb_start = dev_size - 8*2; | |
0f420358 | 2148 | sb_start &= ~(sector_t)(4*2 - 1); |
d9c0fa50 XN |
2149 | |
2150 | bm_space = super_1_choose_bm_space(dev_size); | |
2151 | ||
2152 | /* Space that can be used to store date needs to decrease | |
2153 | * superblock bitmap space and bad block space(4K) | |
2154 | */ | |
2155 | max_sectors = sb_start - bm_space - 4*2; | |
2156 | ||
15f4a5fd AN |
2157 | if (!num_sectors || num_sectors > max_sectors) |
2158 | num_sectors = max_sectors; | |
55df1ce0 | 2159 | rdev->sb_start = sb_start; |
0cd17fec | 2160 | } |
65a06f06 | 2161 | sb = page_address(rdev->sb_page); |
15f4a5fd | 2162 | sb->data_size = cpu_to_le64(num_sectors); |
3fb632e4 | 2163 | sb->super_offset = cpu_to_le64(rdev->sb_start); |
0cd17fec | 2164 | sb->sb_csum = calc_sb_1_csum(sb); |
46533ff7 N |
2165 | do { |
2166 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
2167 | rdev->sb_page); | |
2168 | } while (md_super_wait(rdev->mddev) < 0); | |
c26a44ed | 2169 | return num_sectors; |
c6563a8c N |
2170 | |
2171 | } | |
2172 | ||
2173 | static int | |
2174 | super_1_allow_new_offset(struct md_rdev *rdev, | |
2175 | unsigned long long new_offset) | |
2176 | { | |
2177 | /* All necessary checks on new >= old have been done */ | |
2178 | struct bitmap *bitmap; | |
2179 | if (new_offset >= rdev->data_offset) | |
2180 | return 1; | |
2181 | ||
2182 | /* with 1.0 metadata, there is no metadata to tread on | |
2183 | * so we can always move back */ | |
2184 | if (rdev->mddev->minor_version == 0) | |
2185 | return 1; | |
2186 | ||
2187 | /* otherwise we must be sure not to step on | |
2188 | * any metadata, so stay: | |
2189 | * 36K beyond start of superblock | |
2190 | * beyond end of badblocks | |
2191 | * beyond write-intent bitmap | |
2192 | */ | |
2193 | if (rdev->sb_start + (32+4)*2 > new_offset) | |
2194 | return 0; | |
2195 | bitmap = rdev->mddev->bitmap; | |
2196 | if (bitmap && !rdev->mddev->bitmap_info.file && | |
2197 | rdev->sb_start + rdev->mddev->bitmap_info.offset + | |
1ec885cd | 2198 | bitmap->storage.file_pages * (PAGE_SIZE>>9) > new_offset) |
c6563a8c N |
2199 | return 0; |
2200 | if (rdev->badblocks.sector + rdev->badblocks.size > new_offset) | |
2201 | return 0; | |
2202 | ||
2203 | return 1; | |
0cd17fec | 2204 | } |
1da177e4 | 2205 | |
75c96f85 | 2206 | static struct super_type super_types[] = { |
1da177e4 LT |
2207 | [0] = { |
2208 | .name = "0.90.0", | |
2209 | .owner = THIS_MODULE, | |
0cd17fec CW |
2210 | .load_super = super_90_load, |
2211 | .validate_super = super_90_validate, | |
2212 | .sync_super = super_90_sync, | |
2213 | .rdev_size_change = super_90_rdev_size_change, | |
c6563a8c | 2214 | .allow_new_offset = super_90_allow_new_offset, |
1da177e4 LT |
2215 | }, |
2216 | [1] = { | |
2217 | .name = "md-1", | |
2218 | .owner = THIS_MODULE, | |
0cd17fec CW |
2219 | .load_super = super_1_load, |
2220 | .validate_super = super_1_validate, | |
2221 | .sync_super = super_1_sync, | |
2222 | .rdev_size_change = super_1_rdev_size_change, | |
c6563a8c | 2223 | .allow_new_offset = super_1_allow_new_offset, |
1da177e4 LT |
2224 | }, |
2225 | }; | |
1da177e4 | 2226 | |
fd01b88c | 2227 | static void sync_super(struct mddev *mddev, struct md_rdev *rdev) |
076f968b JB |
2228 | { |
2229 | if (mddev->sync_super) { | |
2230 | mddev->sync_super(mddev, rdev); | |
2231 | return; | |
2232 | } | |
2233 | ||
2234 | BUG_ON(mddev->major_version >= ARRAY_SIZE(super_types)); | |
2235 | ||
2236 | super_types[mddev->major_version].sync_super(mddev, rdev); | |
2237 | } | |
2238 | ||
fd01b88c | 2239 | static int match_mddev_units(struct mddev *mddev1, struct mddev *mddev2) |
1da177e4 | 2240 | { |
3cb03002 | 2241 | struct md_rdev *rdev, *rdev2; |
1da177e4 | 2242 | |
4b80991c | 2243 | rcu_read_lock(); |
0b020e85 SL |
2244 | rdev_for_each_rcu(rdev, mddev1) { |
2245 | if (test_bit(Faulty, &rdev->flags) || | |
2246 | test_bit(Journal, &rdev->flags) || | |
2247 | rdev->raid_disk == -1) | |
2248 | continue; | |
2249 | rdev_for_each_rcu(rdev2, mddev2) { | |
2250 | if (test_bit(Faulty, &rdev2->flags) || | |
2251 | test_bit(Journal, &rdev2->flags) || | |
2252 | rdev2->raid_disk == -1) | |
2253 | continue; | |
61a27e1f | 2254 | if (rdev->bdev->bd_disk == rdev2->bdev->bd_disk) { |
4b80991c | 2255 | rcu_read_unlock(); |
7dd5e7c3 | 2256 | return 1; |
4b80991c | 2257 | } |
0b020e85 SL |
2258 | } |
2259 | } | |
4b80991c | 2260 | rcu_read_unlock(); |
1da177e4 LT |
2261 | return 0; |
2262 | } | |
2263 | ||
2264 | static LIST_HEAD(pending_raid_disks); | |
2265 | ||
ac5e7113 AN |
2266 | /* |
2267 | * Try to register data integrity profile for an mddev | |
2268 | * | |
2269 | * This is called when an array is started and after a disk has been kicked | |
2270 | * from the array. It only succeeds if all working and active component devices | |
2271 | * are integrity capable with matching profiles. | |
2272 | */ | |
fd01b88c | 2273 | int md_integrity_register(struct mddev *mddev) |
ac5e7113 | 2274 | { |
3cb03002 | 2275 | struct md_rdev *rdev, *reference = NULL; |
ac5e7113 AN |
2276 | |
2277 | if (list_empty(&mddev->disks)) | |
2278 | return 0; /* nothing to do */ | |
629acb6a JB |
2279 | if (!mddev->gendisk || blk_get_integrity(mddev->gendisk)) |
2280 | return 0; /* shouldn't register, or already is */ | |
dafb20fa | 2281 | rdev_for_each(rdev, mddev) { |
ac5e7113 AN |
2282 | /* skip spares and non-functional disks */ |
2283 | if (test_bit(Faulty, &rdev->flags)) | |
2284 | continue; | |
2285 | if (rdev->raid_disk < 0) | |
2286 | continue; | |
ac5e7113 AN |
2287 | if (!reference) { |
2288 | /* Use the first rdev as the reference */ | |
2289 | reference = rdev; | |
2290 | continue; | |
2291 | } | |
2292 | /* does this rdev's profile match the reference profile? */ | |
2293 | if (blk_integrity_compare(reference->bdev->bd_disk, | |
2294 | rdev->bdev->bd_disk) < 0) | |
2295 | return -EINVAL; | |
2296 | } | |
89078d57 MP |
2297 | if (!reference || !bdev_get_integrity(reference->bdev)) |
2298 | return 0; | |
ac5e7113 AN |
2299 | /* |
2300 | * All component devices are integrity capable and have matching | |
2301 | * profiles, register the common profile for the md device. | |
2302 | */ | |
25520d55 MP |
2303 | blk_integrity_register(mddev->gendisk, |
2304 | bdev_get_integrity(reference->bdev)); | |
2305 | ||
9d48739e | 2306 | pr_debug("md: data integrity enabled on %s\n", mdname(mddev)); |
10764815 | 2307 | if (bioset_integrity_create(&mddev->bio_set, BIO_POOL_SIZE) || |
daee2024 | 2308 | (mddev->level != 1 && mddev->level != 10 && |
c687297b | 2309 | bioset_integrity_create(&mddev->io_clone_set, BIO_POOL_SIZE))) { |
de3ea66e GJ |
2310 | /* |
2311 | * No need to handle the failure of bioset_integrity_create, | |
2312 | * because the function is called by md_run() -> pers->run(), | |
2313 | * md_run calls bioset_exit -> bioset_integrity_free in case | |
2314 | * of failure case. | |
2315 | */ | |
9d48739e | 2316 | pr_err("md: failed to create integrity pool for %s\n", |
a91a2785 MP |
2317 | mdname(mddev)); |
2318 | return -EINVAL; | |
2319 | } | |
ac5e7113 AN |
2320 | return 0; |
2321 | } | |
2322 | EXPORT_SYMBOL(md_integrity_register); | |
2323 | ||
1501efad DW |
2324 | /* |
2325 | * Attempt to add an rdev, but only if it is consistent with the current | |
2326 | * integrity profile | |
2327 | */ | |
2328 | int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev) | |
3f9d99c1 | 2329 | { |
2863b9eb JB |
2330 | struct blk_integrity *bi_mddev; |
2331 | ||
2332 | if (!mddev->gendisk) | |
1501efad | 2333 | return 0; |
2863b9eb | 2334 | |
2863b9eb | 2335 | bi_mddev = blk_get_integrity(mddev->gendisk); |
3f9d99c1 | 2336 | |
ac5e7113 | 2337 | if (!bi_mddev) /* nothing to do */ |
1501efad DW |
2338 | return 0; |
2339 | ||
2340 | if (blk_integrity_compare(mddev->gendisk, rdev->bdev->bd_disk) != 0) { | |
913cce5a CH |
2341 | pr_err("%s: incompatible integrity profile for %pg\n", |
2342 | mdname(mddev), rdev->bdev); | |
1501efad DW |
2343 | return -ENXIO; |
2344 | } | |
2345 | ||
2346 | return 0; | |
3f9d99c1 | 2347 | } |
ac5e7113 | 2348 | EXPORT_SYMBOL(md_integrity_add_rdev); |
3f9d99c1 | 2349 | |
d7a47838 CH |
2350 | static bool rdev_read_only(struct md_rdev *rdev) |
2351 | { | |
2352 | return bdev_read_only(rdev->bdev) || | |
2353 | (rdev->meta_bdev && bdev_read_only(rdev->meta_bdev)); | |
2354 | } | |
2355 | ||
f72ffdd6 | 2356 | static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) |
1da177e4 | 2357 | { |
7dd5e7c3 | 2358 | char b[BDEVNAME_SIZE]; |
5e55e2f5 | 2359 | int err; |
1da177e4 | 2360 | |
11e2ede0 DW |
2361 | /* prevent duplicates */ |
2362 | if (find_rdev(mddev, rdev->bdev->bd_dev)) | |
2363 | return -EEXIST; | |
2364 | ||
d7a47838 | 2365 | if (rdev_read_only(rdev) && mddev->pers) |
97b20ef7 N |
2366 | return -EROFS; |
2367 | ||
dd8ac336 | 2368 | /* make sure rdev->sectors exceeds mddev->dev_sectors */ |
f6b6ec5c SL |
2369 | if (!test_bit(Journal, &rdev->flags) && |
2370 | rdev->sectors && | |
2371 | (mddev->dev_sectors == 0 || rdev->sectors < mddev->dev_sectors)) { | |
a778b73f N |
2372 | if (mddev->pers) { |
2373 | /* Cannot change size, so fail | |
2374 | * If mddev->level <= 0, then we don't care | |
2375 | * about aligning sizes (e.g. linear) | |
2376 | */ | |
2377 | if (mddev->level > 0) | |
2378 | return -ENOSPC; | |
2379 | } else | |
dd8ac336 | 2380 | mddev->dev_sectors = rdev->sectors; |
2bf071bf | 2381 | } |
1da177e4 LT |
2382 | |
2383 | /* Verify rdev->desc_nr is unique. | |
2384 | * If it is -1, assign a free number, else | |
2385 | * check number is not in use | |
2386 | */ | |
4878e9eb | 2387 | rcu_read_lock(); |
1da177e4 LT |
2388 | if (rdev->desc_nr < 0) { |
2389 | int choice = 0; | |
4878e9eb N |
2390 | if (mddev->pers) |
2391 | choice = mddev->raid_disks; | |
57d051dc | 2392 | while (md_find_rdev_nr_rcu(mddev, choice)) |
1da177e4 LT |
2393 | choice++; |
2394 | rdev->desc_nr = choice; | |
2395 | } else { | |
57d051dc | 2396 | if (md_find_rdev_nr_rcu(mddev, rdev->desc_nr)) { |
4878e9eb | 2397 | rcu_read_unlock(); |
1da177e4 | 2398 | return -EBUSY; |
4878e9eb | 2399 | } |
1da177e4 | 2400 | } |
4878e9eb | 2401 | rcu_read_unlock(); |
f6b6ec5c SL |
2402 | if (!test_bit(Journal, &rdev->flags) && |
2403 | mddev->max_disks && rdev->desc_nr >= mddev->max_disks) { | |
9d48739e N |
2404 | pr_warn("md: %s: array is limited to %d devices\n", |
2405 | mdname(mddev), mddev->max_disks); | |
de01dfad N |
2406 | return -EBUSY; |
2407 | } | |
900d156b | 2408 | snprintf(b, sizeof(b), "%pg", rdev->bdev); |
90a9befb | 2409 | strreplace(b, '/', '!'); |
649316b2 | 2410 | |
1da177e4 | 2411 | rdev->mddev = mddev; |
9d48739e | 2412 | pr_debug("md: bind<%s>\n", b); |
86e6ffdd | 2413 | |
963c555e | 2414 | if (mddev->raid_disks) |
404659cf | 2415 | mddev_create_serial_pool(mddev, rdev, false); |
963c555e | 2416 | |
b2d6db58 | 2417 | if ((err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b))) |
5e55e2f5 | 2418 | goto fail; |
86e6ffdd | 2419 | |
5e3b8a8d | 2420 | /* failure here is OK */ |
8d65269f | 2421 | err = sysfs_create_link(&rdev->kobj, bdev_kobj(rdev->bdev), "block"); |
00bcb4ac | 2422 | rdev->sysfs_state = sysfs_get_dirent_safe(rdev->kobj.sd, "state"); |
e1a86dbb JB |
2423 | rdev->sysfs_unack_badblocks = |
2424 | sysfs_get_dirent_safe(rdev->kobj.sd, "unacknowledged_bad_blocks"); | |
2425 | rdev->sysfs_badblocks = | |
2426 | sysfs_get_dirent_safe(rdev->kobj.sd, "bad_blocks"); | |
3c0ee63a | 2427 | |
4b80991c | 2428 | list_add_rcu(&rdev->same_set, &mddev->disks); |
e09b457b | 2429 | bd_link_disk_holder(rdev->bdev, mddev->gendisk); |
4044ba58 N |
2430 | |
2431 | /* May as well allow recovery to be retried once */ | |
5389042f | 2432 | mddev->recovery_disabled++; |
3f9d99c1 | 2433 | |
1da177e4 | 2434 | return 0; |
5e55e2f5 N |
2435 | |
2436 | fail: | |
9d48739e N |
2437 | pr_warn("md: failed to register dev-%s for %s\n", |
2438 | b, mdname(mddev)); | |
5e55e2f5 | 2439 | return err; |
1da177e4 LT |
2440 | } |
2441 | ||
b5c1acf0 CH |
2442 | void md_autodetect_dev(dev_t dev); |
2443 | ||
2736e8ee CH |
2444 | /* just for claiming the bdev */ |
2445 | static struct md_rdev claim_rdev; | |
2446 | ||
2447 | static void export_rdev(struct md_rdev *rdev, struct mddev *mddev) | |
b5c1acf0 CH |
2448 | { |
2449 | pr_debug("md: export_rdev(%pg)\n", rdev->bdev); | |
2450 | md_rdev_clear(rdev); | |
2451 | #ifndef MODULE | |
2452 | if (test_bit(AutoDetected, &rdev->flags)) | |
2453 | md_autodetect_dev(rdev->bdev->bd_dev); | |
2454 | #endif | |
9f0f5a30 | 2455 | bdev_release(rdev->bdev_handle); |
b5c1acf0 CH |
2456 | rdev->bdev = NULL; |
2457 | kobject_put(&rdev->kobj); | |
2458 | } | |
2459 | ||
2460 | static void md_kick_rdev_from_array(struct md_rdev *rdev) | |
1da177e4 | 2461 | { |
3ce94ce5 YK |
2462 | struct mddev *mddev = rdev->mddev; |
2463 | ||
49731baa | 2464 | bd_unlink_disk_holder(rdev->bdev, rdev->mddev->gendisk); |
4b80991c | 2465 | list_del_rcu(&rdev->same_set); |
913cce5a | 2466 | pr_debug("md: unbind<%pg>\n", rdev->bdev); |
11d3a9f6 | 2467 | mddev_destroy_serial_pool(rdev->mddev, rdev, false); |
1da177e4 | 2468 | rdev->mddev = NULL; |
86e6ffdd | 2469 | sysfs_remove_link(&rdev->kobj, "block"); |
3c0ee63a | 2470 | sysfs_put(rdev->sysfs_state); |
e1a86dbb JB |
2471 | sysfs_put(rdev->sysfs_unack_badblocks); |
2472 | sysfs_put(rdev->sysfs_badblocks); | |
3c0ee63a | 2473 | rdev->sysfs_state = NULL; |
e1a86dbb JB |
2474 | rdev->sysfs_unack_badblocks = NULL; |
2475 | rdev->sysfs_badblocks = NULL; | |
2230dfe4 | 2476 | rdev->badblocks.count = 0; |
3ce94ce5 | 2477 | |
4b80991c | 2478 | synchronize_rcu(); |
3ce94ce5 YK |
2479 | |
2480 | /* | |
2481 | * kobject_del() will wait for all in progress writers to be done, where | |
2482 | * reconfig_mutex is held, hence it can't be called under | |
2483 | * reconfig_mutex and it's delayed to mddev_unlock(). | |
2484 | */ | |
3ce94ce5 | 2485 | list_add(&rdev->same_set, &mddev->deleting); |
1da177e4 LT |
2486 | } |
2487 | ||
fd01b88c | 2488 | static void export_array(struct mddev *mddev) |
1da177e4 | 2489 | { |
0638bb0e | 2490 | struct md_rdev *rdev; |
1da177e4 | 2491 | |
0638bb0e N |
2492 | while (!list_empty(&mddev->disks)) { |
2493 | rdev = list_first_entry(&mddev->disks, struct md_rdev, | |
2494 | same_set); | |
fb56dfef | 2495 | md_kick_rdev_from_array(rdev); |
1da177e4 | 2496 | } |
1da177e4 LT |
2497 | mddev->raid_disks = 0; |
2498 | mddev->major_version = 0; | |
2499 | } | |
2500 | ||
6497709b N |
2501 | static bool set_in_sync(struct mddev *mddev) |
2502 | { | |
efa4b77b | 2503 | lockdep_assert_held(&mddev->lock); |
4ad23a97 N |
2504 | if (!mddev->in_sync) { |
2505 | mddev->sync_checkers++; | |
2506 | spin_unlock(&mddev->lock); | |
2507 | percpu_ref_switch_to_atomic_sync(&mddev->writes_pending); | |
2508 | spin_lock(&mddev->lock); | |
2509 | if (!mddev->in_sync && | |
2510 | percpu_ref_is_zero(&mddev->writes_pending)) { | |
6497709b | 2511 | mddev->in_sync = 1; |
4ad23a97 N |
2512 | /* |
2513 | * Ensure ->in_sync is visible before we clear | |
2514 | * ->sync_checkers. | |
2515 | */ | |
55cc39f3 | 2516 | smp_mb(); |
6497709b N |
2517 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2518 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
2519 | } | |
4ad23a97 N |
2520 | if (--mddev->sync_checkers == 0) |
2521 | percpu_ref_switch_to_percpu(&mddev->writes_pending); | |
6497709b N |
2522 | } |
2523 | if (mddev->safemode == 1) | |
2524 | mddev->safemode = 0; | |
2525 | return mddev->in_sync; | |
2526 | } | |
2527 | ||
f72ffdd6 | 2528 | static void sync_sbs(struct mddev *mddev, int nospares) |
1da177e4 | 2529 | { |
42543769 N |
2530 | /* Update each superblock (in-memory image), but |
2531 | * if we are allowed to, skip spares which already | |
2532 | * have the right event counter, or have one earlier | |
2533 | * (which would mean they aren't being marked as dirty | |
2534 | * with the rest of the array) | |
2535 | */ | |
3cb03002 | 2536 | struct md_rdev *rdev; |
dafb20fa | 2537 | rdev_for_each(rdev, mddev) { |
42543769 N |
2538 | if (rdev->sb_events == mddev->events || |
2539 | (nospares && | |
2540 | rdev->raid_disk < 0 && | |
42543769 N |
2541 | rdev->sb_events+1 == mddev->events)) { |
2542 | /* Don't update this superblock */ | |
2543 | rdev->sb_loaded = 2; | |
2544 | } else { | |
076f968b | 2545 | sync_super(mddev, rdev); |
42543769 N |
2546 | rdev->sb_loaded = 1; |
2547 | } | |
1da177e4 LT |
2548 | } |
2549 | } | |
2550 | ||
2aa82191 GR |
2551 | static bool does_sb_need_changing(struct mddev *mddev) |
2552 | { | |
fc873834 | 2553 | struct md_rdev *rdev = NULL, *iter; |
2aa82191 GR |
2554 | struct mdp_superblock_1 *sb; |
2555 | int role; | |
2556 | ||
2557 | /* Find a good rdev */ | |
fc873834 XT |
2558 | rdev_for_each(iter, mddev) |
2559 | if ((iter->raid_disk >= 0) && !test_bit(Faulty, &iter->flags)) { | |
2560 | rdev = iter; | |
2aa82191 | 2561 | break; |
fc873834 | 2562 | } |
2aa82191 GR |
2563 | |
2564 | /* No good device found. */ | |
2565 | if (!rdev) | |
2566 | return false; | |
2567 | ||
2568 | sb = page_address(rdev->sb_page); | |
2569 | /* Check if a device has become faulty or a spare become active */ | |
2570 | rdev_for_each(rdev, mddev) { | |
2571 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
2572 | /* Device activated? */ | |
9151ad5d | 2573 | if (role == MD_DISK_ROLE_SPARE && rdev->raid_disk >= 0 && |
2aa82191 GR |
2574 | !test_bit(Faulty, &rdev->flags)) |
2575 | return true; | |
2576 | /* Device turned faulty? */ | |
9151ad5d | 2577 | if (test_bit(Faulty, &rdev->flags) && (role < MD_DISK_ROLE_MAX)) |
2aa82191 GR |
2578 | return true; |
2579 | } | |
2580 | ||
2581 | /* Check if any mddev parameters have changed */ | |
2582 | if ((mddev->dev_sectors != le64_to_cpu(sb->size)) || | |
2583 | (mddev->reshape_position != le64_to_cpu(sb->reshape_position)) || | |
13459213 | 2584 | (mddev->layout != le32_to_cpu(sb->layout)) || |
2aa82191 GR |
2585 | (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) || |
2586 | (mddev->chunk_sectors != le32_to_cpu(sb->chunksize))) | |
2587 | return true; | |
2588 | ||
2589 | return false; | |
2590 | } | |
2591 | ||
1aee41f6 | 2592 | void md_update_sb(struct mddev *mddev, int force_change) |
1da177e4 | 2593 | { |
3cb03002 | 2594 | struct md_rdev *rdev; |
06d91a5f | 2595 | int sync_req; |
42543769 | 2596 | int nospares = 0; |
2699b672 | 2597 | int any_badblocks_changed = 0; |
23b63f9f | 2598 | int ret = -1; |
1da177e4 | 2599 | |
f97a5528 | 2600 | if (!md_is_rdwr(mddev)) { |
d87f064f | 2601 | if (force_change) |
2953079c | 2602 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
d87f064f N |
2603 | return; |
2604 | } | |
2aa82191 | 2605 | |
2c97cf13 | 2606 | repeat: |
2aa82191 | 2607 | if (mddev_is_clustered(mddev)) { |
2953079c | 2608 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
2aa82191 | 2609 | force_change = 1; |
2953079c | 2610 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
85ad1d13 | 2611 | nospares = 1; |
23b63f9f | 2612 | ret = md_cluster_ops->metadata_update_start(mddev); |
2aa82191 GR |
2613 | /* Has someone else has updated the sb */ |
2614 | if (!does_sb_need_changing(mddev)) { | |
23b63f9f GJ |
2615 | if (ret == 0) |
2616 | md_cluster_ops->metadata_update_cancel(mddev); | |
2953079c SL |
2617 | bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2618 | BIT(MD_SB_CHANGE_DEVS) | | |
2619 | BIT(MD_SB_CHANGE_CLEAN)); | |
2aa82191 GR |
2620 | return; |
2621 | } | |
2622 | } | |
2c97cf13 | 2623 | |
db0505d3 N |
2624 | /* |
2625 | * First make sure individual recovery_offsets are correct | |
2626 | * curr_resync_completed can only be used during recovery. | |
2627 | * During reshape/resync it might use array-addresses rather | |
2628 | * that device addresses. | |
2629 | */ | |
dafb20fa | 2630 | rdev_for_each(rdev, mddev) { |
3a3a5ddb N |
2631 | if (rdev->raid_disk >= 0 && |
2632 | mddev->delta_disks >= 0 && | |
db0505d3 N |
2633 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
2634 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery) && | |
2635 | !test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
f2076e7d | 2636 | !test_bit(Journal, &rdev->flags) && |
3a3a5ddb N |
2637 | !test_bit(In_sync, &rdev->flags) && |
2638 | mddev->curr_resync_completed > rdev->recovery_offset) | |
2639 | rdev->recovery_offset = mddev->curr_resync_completed; | |
2640 | ||
f72ffdd6 | 2641 | } |
bd52b746 | 2642 | if (!mddev->persistent) { |
2953079c SL |
2643 | clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2644 | clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
de393cde | 2645 | if (!mddev->external) { |
2953079c | 2646 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
dafb20fa | 2647 | rdev_for_each(rdev, mddev) { |
de393cde | 2648 | if (rdev->badblocks.changed) { |
d0962936 | 2649 | rdev->badblocks.changed = 0; |
fc974ee2 | 2650 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2651 | md_error(mddev, rdev); |
2652 | } | |
2653 | clear_bit(Blocked, &rdev->flags); | |
2654 | clear_bit(BlockedBadBlocks, &rdev->flags); | |
2655 | wake_up(&rdev->blocked_wait); | |
2656 | } | |
2657 | } | |
3a3a5ddb N |
2658 | wake_up(&mddev->sb_wait); |
2659 | return; | |
2660 | } | |
2661 | ||
85572d7c | 2662 | spin_lock(&mddev->lock); |
84692195 | 2663 | |
9ebc6ef1 | 2664 | mddev->utime = ktime_get_real_seconds(); |
3a3a5ddb | 2665 | |
2953079c | 2666 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
850b2b42 | 2667 | force_change = 1; |
2953079c | 2668 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
850b2b42 N |
2669 | /* just a clean<-> dirty transition, possibly leave spares alone, |
2670 | * though if events isn't the right even/odd, we will have to do | |
2671 | * spares after all | |
2672 | */ | |
2673 | nospares = 1; | |
2674 | if (force_change) | |
2675 | nospares = 0; | |
2676 | if (mddev->degraded) | |
84692195 N |
2677 | /* If the array is degraded, then skipping spares is both |
2678 | * dangerous and fairly pointless. | |
2679 | * Dangerous because a device that was removed from the array | |
2680 | * might have a event_count that still looks up-to-date, | |
2681 | * so it can be re-added without a resync. | |
2682 | * Pointless because if there are any spares to skip, | |
2683 | * then a recovery will happen and soon that array won't | |
2684 | * be degraded any more and the spare can go back to sleep then. | |
2685 | */ | |
850b2b42 | 2686 | nospares = 0; |
84692195 | 2687 | |
06d91a5f | 2688 | sync_req = mddev->in_sync; |
42543769 N |
2689 | |
2690 | /* If this is just a dirty<->clean transition, and the array is clean | |
2691 | * and 'events' is odd, we can roll back to the previous clean state */ | |
850b2b42 | 2692 | if (nospares |
42543769 | 2693 | && (mddev->in_sync && mddev->recovery_cp == MaxSector) |
a8707c08 N |
2694 | && mddev->can_decrease_events |
2695 | && mddev->events != 1) { | |
42543769 | 2696 | mddev->events--; |
a8707c08 N |
2697 | mddev->can_decrease_events = 0; |
2698 | } else { | |
42543769 N |
2699 | /* otherwise we have to go forward and ... */ |
2700 | mddev->events ++; | |
a8707c08 | 2701 | mddev->can_decrease_events = nospares; |
42543769 | 2702 | } |
1da177e4 | 2703 | |
403df478 N |
2704 | /* |
2705 | * This 64-bit counter should never wrap. | |
2706 | * Either we are in around ~1 trillion A.C., assuming | |
2707 | * 1 reboot per second, or we have a bug... | |
2708 | */ | |
2709 | WARN_ON(mddev->events == 0); | |
2699b672 | 2710 | |
dafb20fa | 2711 | rdev_for_each(rdev, mddev) { |
2699b672 N |
2712 | if (rdev->badblocks.changed) |
2713 | any_badblocks_changed++; | |
de393cde N |
2714 | if (test_bit(Faulty, &rdev->flags)) |
2715 | set_bit(FaultRecorded, &rdev->flags); | |
2716 | } | |
2699b672 | 2717 | |
e691063a | 2718 | sync_sbs(mddev, nospares); |
85572d7c | 2719 | spin_unlock(&mddev->lock); |
1da177e4 | 2720 | |
36a4e1fe N |
2721 | pr_debug("md: updating %s RAID superblock on device (in sync %d)\n", |
2722 | mdname(mddev), mddev->in_sync); | |
1da177e4 | 2723 | |
504634f6 SL |
2724 | if (mddev->queue) |
2725 | blk_add_trace_msg(mddev->queue, "md md_update_sb"); | |
46533ff7 | 2726 | rewrite: |
e64e4018 | 2727 | md_bitmap_update_sb(mddev->bitmap); |
dafb20fa | 2728 | rdev_for_each(rdev, mddev) { |
42543769 N |
2729 | if (rdev->sb_loaded != 1) |
2730 | continue; /* no noise on spare devices */ | |
1da177e4 | 2731 | |
f466722c | 2732 | if (!test_bit(Faulty, &rdev->flags)) { |
7bfa19f2 | 2733 | md_super_write(mddev,rdev, |
0f420358 | 2734 | rdev->sb_start, rdev->sb_size, |
7bfa19f2 | 2735 | rdev->sb_page); |
913cce5a CH |
2736 | pr_debug("md: (write) %pg's sb offset: %llu\n", |
2737 | rdev->bdev, | |
36a4e1fe | 2738 | (unsigned long long)rdev->sb_start); |
42543769 | 2739 | rdev->sb_events = mddev->events; |
2699b672 N |
2740 | if (rdev->badblocks.size) { |
2741 | md_super_write(mddev, rdev, | |
2742 | rdev->badblocks.sector, | |
2743 | rdev->badblocks.size << 9, | |
2744 | rdev->bb_page); | |
2745 | rdev->badblocks.size = 0; | |
2746 | } | |
7bfa19f2 | 2747 | |
f466722c | 2748 | } else |
913cce5a CH |
2749 | pr_debug("md: %pg (skipping faulty)\n", |
2750 | rdev->bdev); | |
d70ed2e4 | 2751 | |
7bfa19f2 | 2752 | if (mddev->level == LEVEL_MULTIPATH) |
1da177e4 LT |
2753 | /* only need to write one superblock... */ |
2754 | break; | |
2755 | } | |
46533ff7 N |
2756 | if (md_super_wait(mddev) < 0) |
2757 | goto rewrite; | |
2953079c | 2758 | /* if there was a failure, MD_SB_CHANGE_DEVS was set, and we re-write super */ |
7bfa19f2 | 2759 | |
2c97cf13 GJ |
2760 | if (mddev_is_clustered(mddev) && ret == 0) |
2761 | md_cluster_ops->metadata_update_finish(mddev); | |
2762 | ||
850b2b42 | 2763 | if (mddev->in_sync != sync_req || |
2953079c SL |
2764 | !bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2765 | BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_CLEAN))) | |
06d91a5f | 2766 | /* have to write it out again */ |
06d91a5f | 2767 | goto repeat; |
3d310eb7 | 2768 | wake_up(&mddev->sb_wait); |
acb180b0 | 2769 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
e1a86dbb | 2770 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
06d91a5f | 2771 | |
dafb20fa | 2772 | rdev_for_each(rdev, mddev) { |
de393cde N |
2773 | if (test_and_clear_bit(FaultRecorded, &rdev->flags)) |
2774 | clear_bit(Blocked, &rdev->flags); | |
2775 | ||
2776 | if (any_badblocks_changed) | |
fc974ee2 | 2777 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2778 | clear_bit(BlockedBadBlocks, &rdev->flags); |
2779 | wake_up(&rdev->blocked_wait); | |
2780 | } | |
1da177e4 | 2781 | } |
1aee41f6 | 2782 | EXPORT_SYMBOL(md_update_sb); |
1da177e4 | 2783 | |
a6da4ef8 GR |
2784 | static int add_bound_rdev(struct md_rdev *rdev) |
2785 | { | |
2786 | struct mddev *mddev = rdev->mddev; | |
2787 | int err = 0; | |
87d4d916 | 2788 | bool add_journal = test_bit(Journal, &rdev->flags); |
a6da4ef8 | 2789 | |
87d4d916 | 2790 | if (!mddev->pers->hot_remove_disk || add_journal) { |
a6da4ef8 GR |
2791 | /* If there is hot_add_disk but no hot_remove_disk |
2792 | * then added disks for geometry changes, | |
2793 | * and should be added immediately. | |
2794 | */ | |
2795 | super_types[mddev->major_version]. | |
2796 | validate_super(mddev, rdev); | |
87d4d916 SL |
2797 | if (add_journal) |
2798 | mddev_suspend(mddev); | |
a6da4ef8 | 2799 | err = mddev->pers->hot_add_disk(mddev, rdev); |
87d4d916 SL |
2800 | if (add_journal) |
2801 | mddev_resume(mddev); | |
a6da4ef8 | 2802 | if (err) { |
db767672 | 2803 | md_kick_rdev_from_array(rdev); |
a6da4ef8 GR |
2804 | return err; |
2805 | } | |
2806 | } | |
2807 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2808 | ||
2953079c | 2809 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a6da4ef8 GR |
2810 | if (mddev->degraded) |
2811 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
2812 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
54679486 | 2813 | md_new_event(); |
a6da4ef8 GR |
2814 | md_wakeup_thread(mddev->thread); |
2815 | return 0; | |
2816 | } | |
1da177e4 | 2817 | |
7f6ce769 | 2818 | /* words written to sysfs files may, or may not, be \n terminated. |
bce74dac N |
2819 | * We want to accept with case. For this we use cmd_match. |
2820 | */ | |
2821 | static int cmd_match(const char *cmd, const char *str) | |
2822 | { | |
2823 | /* See if cmd, written into a sysfs file, matches | |
2824 | * str. They must either be the same, or cmd can | |
2825 | * have a trailing newline | |
2826 | */ | |
2827 | while (*cmd && *str && *cmd == *str) { | |
2828 | cmd++; | |
2829 | str++; | |
2830 | } | |
2831 | if (*cmd == '\n') | |
2832 | cmd++; | |
2833 | if (*str || *cmd) | |
2834 | return 0; | |
2835 | return 1; | |
2836 | } | |
2837 | ||
86e6ffdd N |
2838 | struct rdev_sysfs_entry { |
2839 | struct attribute attr; | |
3cb03002 N |
2840 | ssize_t (*show)(struct md_rdev *, char *); |
2841 | ssize_t (*store)(struct md_rdev *, const char *, size_t); | |
86e6ffdd N |
2842 | }; |
2843 | ||
2844 | static ssize_t | |
3cb03002 | 2845 | state_show(struct md_rdev *rdev, char *page) |
86e6ffdd | 2846 | { |
35b785f7 | 2847 | char *sep = ","; |
20a49ff6 | 2848 | size_t len = 0; |
6aa7de05 | 2849 | unsigned long flags = READ_ONCE(rdev->flags); |
86e6ffdd | 2850 | |
758bfc8a | 2851 | if (test_bit(Faulty, &flags) || |
dcbcb486 TM |
2852 | (!test_bit(ExternalBbl, &flags) && |
2853 | rdev->badblocks.unacked_exist)) | |
35b785f7 TM |
2854 | len += sprintf(page+len, "faulty%s", sep); |
2855 | if (test_bit(In_sync, &flags)) | |
2856 | len += sprintf(page+len, "in_sync%s", sep); | |
2857 | if (test_bit(Journal, &flags)) | |
2858 | len += sprintf(page+len, "journal%s", sep); | |
2859 | if (test_bit(WriteMostly, &flags)) | |
2860 | len += sprintf(page+len, "write_mostly%s", sep); | |
758bfc8a | 2861 | if (test_bit(Blocked, &flags) || |
52c64152 | 2862 | (rdev->badblocks.unacked_exist |
35b785f7 TM |
2863 | && !test_bit(Faulty, &flags))) |
2864 | len += sprintf(page+len, "blocked%s", sep); | |
758bfc8a | 2865 | if (!test_bit(Faulty, &flags) && |
f2076e7d | 2866 | !test_bit(Journal, &flags) && |
35b785f7 TM |
2867 | !test_bit(In_sync, &flags)) |
2868 | len += sprintf(page+len, "spare%s", sep); | |
2869 | if (test_bit(WriteErrorSeen, &flags)) | |
2870 | len += sprintf(page+len, "write_error%s", sep); | |
2871 | if (test_bit(WantReplacement, &flags)) | |
2872 | len += sprintf(page+len, "want_replacement%s", sep); | |
2873 | if (test_bit(Replacement, &flags)) | |
2874 | len += sprintf(page+len, "replacement%s", sep); | |
2875 | if (test_bit(ExternalBbl, &flags)) | |
2876 | len += sprintf(page+len, "external_bbl%s", sep); | |
688834e6 N |
2877 | if (test_bit(FailFast, &flags)) |
2878 | len += sprintf(page+len, "failfast%s", sep); | |
35b785f7 TM |
2879 | |
2880 | if (len) | |
2881 | len -= strlen(sep); | |
2d78f8c4 | 2882 | |
86e6ffdd N |
2883 | return len+sprintf(page+len, "\n"); |
2884 | } | |
2885 | ||
45dc2de1 | 2886 | static ssize_t |
3cb03002 | 2887 | state_store(struct md_rdev *rdev, const char *buf, size_t len) |
45dc2de1 N |
2888 | { |
2889 | /* can write | |
de393cde | 2890 | * faulty - simulates an error |
45dc2de1 | 2891 | * remove - disconnects the device |
f655675b N |
2892 | * writemostly - sets write_mostly |
2893 | * -writemostly - clears write_mostly | |
de393cde N |
2894 | * blocked - sets the Blocked flags |
2895 | * -blocked - clears the Blocked and possibly simulates an error | |
6d56e278 | 2896 | * insync - sets Insync providing device isn't active |
f466722c N |
2897 | * -insync - clear Insync for a device with a slot assigned, |
2898 | * so that it gets rebuilt based on bitmap | |
d7a9d443 N |
2899 | * write_error - sets WriteErrorSeen |
2900 | * -write_error - clears WriteErrorSeen | |
688834e6 | 2901 | * {,-}failfast - set/clear FailFast |
45dc2de1 | 2902 | */ |
8b9e2291 XN |
2903 | |
2904 | struct mddev *mddev = rdev->mddev; | |
45dc2de1 | 2905 | int err = -EINVAL; |
8b9e2291 XN |
2906 | bool need_update_sb = false; |
2907 | ||
45dc2de1 N |
2908 | if (cmd_match(buf, "faulty") && rdev->mddev->pers) { |
2909 | md_error(rdev->mddev, rdev); | |
9631abdb MT |
2910 | |
2911 | if (test_bit(MD_BROKEN, &rdev->mddev->flags)) | |
5ef56c8f | 2912 | err = -EBUSY; |
9631abdb MT |
2913 | else |
2914 | err = 0; | |
45dc2de1 | 2915 | } else if (cmd_match(buf, "remove")) { |
5d881783 SL |
2916 | if (rdev->mddev->pers) { |
2917 | clear_bit(Blocked, &rdev->flags); | |
2918 | remove_and_add_spares(rdev->mddev, rdev); | |
2919 | } | |
45dc2de1 N |
2920 | if (rdev->raid_disk >= 0) |
2921 | err = -EBUSY; | |
2922 | else { | |
45dc2de1 | 2923 | err = 0; |
a9720903 GJ |
2924 | if (mddev_is_clustered(mddev)) |
2925 | err = md_cluster_ops->remove_disk(mddev, rdev); | |
2926 | ||
2927 | if (err == 0) { | |
2928 | md_kick_rdev_from_array(rdev); | |
060b0689 | 2929 | if (mddev->pers) { |
2953079c | 2930 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
2931 | md_wakeup_thread(mddev->thread); |
2932 | } | |
54679486 | 2933 | md_new_event(); |
a9720903 | 2934 | } |
45dc2de1 | 2935 | } |
f655675b N |
2936 | } else if (cmd_match(buf, "writemostly")) { |
2937 | set_bit(WriteMostly, &rdev->flags); | |
404659cf | 2938 | mddev_create_serial_pool(rdev->mddev, rdev, false); |
8b9e2291 | 2939 | need_update_sb = true; |
f655675b N |
2940 | err = 0; |
2941 | } else if (cmd_match(buf, "-writemostly")) { | |
11d3a9f6 | 2942 | mddev_destroy_serial_pool(rdev->mddev, rdev, false); |
f655675b | 2943 | clear_bit(WriteMostly, &rdev->flags); |
8b9e2291 | 2944 | need_update_sb = true; |
6bfe0b49 DW |
2945 | err = 0; |
2946 | } else if (cmd_match(buf, "blocked")) { | |
2947 | set_bit(Blocked, &rdev->flags); | |
2948 | err = 0; | |
2949 | } else if (cmd_match(buf, "-blocked")) { | |
de393cde | 2950 | if (!test_bit(Faulty, &rdev->flags) && |
dcbcb486 | 2951 | !test_bit(ExternalBbl, &rdev->flags) && |
7da64a0a | 2952 | rdev->badblocks.unacked_exist) { |
de393cde N |
2953 | /* metadata handler doesn't understand badblocks, |
2954 | * so we need to fail the device | |
2955 | */ | |
2956 | md_error(rdev->mddev, rdev); | |
2957 | } | |
6bfe0b49 | 2958 | clear_bit(Blocked, &rdev->flags); |
de393cde | 2959 | clear_bit(BlockedBadBlocks, &rdev->flags); |
6bfe0b49 DW |
2960 | wake_up(&rdev->blocked_wait); |
2961 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
2962 | md_wakeup_thread(rdev->mddev->thread); | |
2963 | ||
6d56e278 N |
2964 | err = 0; |
2965 | } else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) { | |
2966 | set_bit(In_sync, &rdev->flags); | |
f655675b | 2967 | err = 0; |
688834e6 N |
2968 | } else if (cmd_match(buf, "failfast")) { |
2969 | set_bit(FailFast, &rdev->flags); | |
8b9e2291 | 2970 | need_update_sb = true; |
688834e6 N |
2971 | err = 0; |
2972 | } else if (cmd_match(buf, "-failfast")) { | |
2973 | clear_bit(FailFast, &rdev->flags); | |
8b9e2291 | 2974 | need_update_sb = true; |
688834e6 | 2975 | err = 0; |
f2076e7d SL |
2976 | } else if (cmd_match(buf, "-insync") && rdev->raid_disk >= 0 && |
2977 | !test_bit(Journal, &rdev->flags)) { | |
e1960f8c N |
2978 | if (rdev->mddev->pers == NULL) { |
2979 | clear_bit(In_sync, &rdev->flags); | |
2980 | rdev->saved_raid_disk = rdev->raid_disk; | |
2981 | rdev->raid_disk = -1; | |
2982 | err = 0; | |
2983 | } | |
d7a9d443 N |
2984 | } else if (cmd_match(buf, "write_error")) { |
2985 | set_bit(WriteErrorSeen, &rdev->flags); | |
2986 | err = 0; | |
2987 | } else if (cmd_match(buf, "-write_error")) { | |
2988 | clear_bit(WriteErrorSeen, &rdev->flags); | |
2989 | err = 0; | |
2d78f8c4 N |
2990 | } else if (cmd_match(buf, "want_replacement")) { |
2991 | /* Any non-spare device that is not a replacement can | |
2992 | * become want_replacement at any time, but we then need to | |
2993 | * check if recovery is needed. | |
2994 | */ | |
2995 | if (rdev->raid_disk >= 0 && | |
f2076e7d | 2996 | !test_bit(Journal, &rdev->flags) && |
2d78f8c4 N |
2997 | !test_bit(Replacement, &rdev->flags)) |
2998 | set_bit(WantReplacement, &rdev->flags); | |
2999 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
3000 | md_wakeup_thread(rdev->mddev->thread); | |
3001 | err = 0; | |
3002 | } else if (cmd_match(buf, "-want_replacement")) { | |
3003 | /* Clearing 'want_replacement' is always allowed. | |
3004 | * Once replacements starts it is too late though. | |
3005 | */ | |
3006 | err = 0; | |
3007 | clear_bit(WantReplacement, &rdev->flags); | |
3008 | } else if (cmd_match(buf, "replacement")) { | |
3009 | /* Can only set a device as a replacement when array has not | |
3010 | * yet been started. Once running, replacement is automatic | |
3011 | * from spares, or by assigning 'slot'. | |
3012 | */ | |
3013 | if (rdev->mddev->pers) | |
3014 | err = -EBUSY; | |
3015 | else { | |
3016 | set_bit(Replacement, &rdev->flags); | |
3017 | err = 0; | |
3018 | } | |
3019 | } else if (cmd_match(buf, "-replacement")) { | |
3020 | /* Similarly, can only clear Replacement before start */ | |
3021 | if (rdev->mddev->pers) | |
3022 | err = -EBUSY; | |
3023 | else { | |
3024 | clear_bit(Replacement, &rdev->flags); | |
3025 | err = 0; | |
3026 | } | |
a6da4ef8 | 3027 | } else if (cmd_match(buf, "re-add")) { |
ee37e621 YY |
3028 | if (!rdev->mddev->pers) |
3029 | err = -EINVAL; | |
3030 | else if (test_bit(Faulty, &rdev->flags) && (rdev->raid_disk == -1) && | |
3031 | rdev->saved_raid_disk >= 0) { | |
97f6cd39 GR |
3032 | /* clear_bit is performed _after_ all the devices |
3033 | * have their local Faulty bit cleared. If any writes | |
3034 | * happen in the meantime in the local node, they | |
3035 | * will land in the local bitmap, which will be synced | |
3036 | * by this node eventually | |
3037 | */ | |
3038 | if (!mddev_is_clustered(rdev->mddev) || | |
3039 | (err = md_cluster_ops->gather_bitmaps(rdev)) == 0) { | |
3040 | clear_bit(Faulty, &rdev->flags); | |
3041 | err = add_bound_rdev(rdev); | |
3042 | } | |
a6da4ef8 GR |
3043 | } else |
3044 | err = -EBUSY; | |
35b785f7 TM |
3045 | } else if (cmd_match(buf, "external_bbl") && (rdev->mddev->external)) { |
3046 | set_bit(ExternalBbl, &rdev->flags); | |
3047 | rdev->badblocks.shift = 0; | |
3048 | err = 0; | |
3049 | } else if (cmd_match(buf, "-external_bbl") && (rdev->mddev->external)) { | |
3050 | clear_bit(ExternalBbl, &rdev->flags); | |
3051 | err = 0; | |
45dc2de1 | 3052 | } |
8b9e2291 XN |
3053 | if (need_update_sb) |
3054 | md_update_sb(mddev, 1); | |
00bcb4ac N |
3055 | if (!err) |
3056 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
45dc2de1 N |
3057 | return err ? err : len; |
3058 | } | |
80ca3a44 | 3059 | static struct rdev_sysfs_entry rdev_state = |
750f199e | 3060 | __ATTR_PREALLOC(state, S_IRUGO|S_IWUSR, state_show, state_store); |
86e6ffdd | 3061 | |
4dbcdc75 | 3062 | static ssize_t |
3cb03002 | 3063 | errors_show(struct md_rdev *rdev, char *page) |
4dbcdc75 N |
3064 | { |
3065 | return sprintf(page, "%d\n", atomic_read(&rdev->corrected_errors)); | |
3066 | } | |
3067 | ||
3068 | static ssize_t | |
3cb03002 | 3069 | errors_store(struct md_rdev *rdev, const char *buf, size_t len) |
4dbcdc75 | 3070 | { |
4c9309c0 AD |
3071 | unsigned int n; |
3072 | int rv; | |
3073 | ||
3074 | rv = kstrtouint(buf, 10, &n); | |
3075 | if (rv < 0) | |
3076 | return rv; | |
3077 | atomic_set(&rdev->corrected_errors, n); | |
3078 | return len; | |
4dbcdc75 N |
3079 | } |
3080 | static struct rdev_sysfs_entry rdev_errors = | |
80ca3a44 | 3081 | __ATTR(errors, S_IRUGO|S_IWUSR, errors_show, errors_store); |
4dbcdc75 | 3082 | |
014236d2 | 3083 | static ssize_t |
3cb03002 | 3084 | slot_show(struct md_rdev *rdev, char *page) |
014236d2 | 3085 | { |
f2076e7d SL |
3086 | if (test_bit(Journal, &rdev->flags)) |
3087 | return sprintf(page, "journal\n"); | |
3088 | else if (rdev->raid_disk < 0) | |
014236d2 N |
3089 | return sprintf(page, "none\n"); |
3090 | else | |
3091 | return sprintf(page, "%d\n", rdev->raid_disk); | |
3092 | } | |
3093 | ||
3094 | static ssize_t | |
3cb03002 | 3095 | slot_store(struct md_rdev *rdev, const char *buf, size_t len) |
014236d2 | 3096 | { |
4c9309c0 | 3097 | int slot; |
c303da6d | 3098 | int err; |
4c9309c0 | 3099 | |
f2076e7d SL |
3100 | if (test_bit(Journal, &rdev->flags)) |
3101 | return -EBUSY; | |
014236d2 N |
3102 | if (strncmp(buf, "none", 4)==0) |
3103 | slot = -1; | |
4c9309c0 AD |
3104 | else { |
3105 | err = kstrtouint(buf, 10, (unsigned int *)&slot); | |
3106 | if (err < 0) | |
3107 | return err; | |
3bc57292 N |
3108 | if (slot < 0) |
3109 | /* overflow */ | |
3110 | return -ENOSPC; | |
4c9309c0 | 3111 | } |
6c2fce2e | 3112 | if (rdev->mddev->pers && slot == -1) { |
c303da6d N |
3113 | /* Setting 'slot' on an active array requires also |
3114 | * updating the 'rd%d' link, and communicating | |
3115 | * with the personality with ->hot_*_disk. | |
3116 | * For now we only support removing | |
3117 | * failed/spare devices. This normally happens automatically, | |
3118 | * but not when the metadata is externally managed. | |
3119 | */ | |
c303da6d N |
3120 | if (rdev->raid_disk == -1) |
3121 | return -EEXIST; | |
3122 | /* personality does all needed checks */ | |
01393f3d | 3123 | if (rdev->mddev->pers->hot_remove_disk == NULL) |
c303da6d | 3124 | return -EINVAL; |
746d3207 N |
3125 | clear_bit(Blocked, &rdev->flags); |
3126 | remove_and_add_spares(rdev->mddev, rdev); | |
3127 | if (rdev->raid_disk >= 0) | |
3128 | return -EBUSY; | |
c303da6d N |
3129 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); |
3130 | md_wakeup_thread(rdev->mddev->thread); | |
6c2fce2e | 3131 | } else if (rdev->mddev->pers) { |
6c2fce2e | 3132 | /* Activating a spare .. or possibly reactivating |
6d56e278 | 3133 | * if we ever get bitmaps working here. |
6c2fce2e | 3134 | */ |
cb01c549 | 3135 | int err; |
6c2fce2e NB |
3136 | |
3137 | if (rdev->raid_disk != -1) | |
3138 | return -EBUSY; | |
3139 | ||
c6751b2b N |
3140 | if (test_bit(MD_RECOVERY_RUNNING, &rdev->mddev->recovery)) |
3141 | return -EBUSY; | |
3142 | ||
6c2fce2e NB |
3143 | if (rdev->mddev->pers->hot_add_disk == NULL) |
3144 | return -EINVAL; | |
3145 | ||
ba1b41b6 N |
3146 | if (slot >= rdev->mddev->raid_disks && |
3147 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
3148 | return -ENOSPC; | |
3149 | ||
6c2fce2e NB |
3150 | rdev->raid_disk = slot; |
3151 | if (test_bit(In_sync, &rdev->flags)) | |
3152 | rdev->saved_raid_disk = slot; | |
3153 | else | |
3154 | rdev->saved_raid_disk = -1; | |
d30519fc | 3155 | clear_bit(In_sync, &rdev->flags); |
8313b8e5 | 3156 | clear_bit(Bitmap_sync, &rdev->flags); |
3f79cc22 | 3157 | err = rdev->mddev->pers->hot_add_disk(rdev->mddev, rdev); |
cb01c549 GR |
3158 | if (err) { |
3159 | rdev->raid_disk = -1; | |
3160 | return err; | |
3161 | } else | |
3162 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
5e3b8a8d DLM |
3163 | /* failure here is OK */; |
3164 | sysfs_link_rdev(rdev->mddev, rdev); | |
6c2fce2e | 3165 | /* don't wakeup anyone, leave that to userspace. */ |
c303da6d | 3166 | } else { |
ba1b41b6 N |
3167 | if (slot >= rdev->mddev->raid_disks && |
3168 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
c303da6d N |
3169 | return -ENOSPC; |
3170 | rdev->raid_disk = slot; | |
3171 | /* assume it is working */ | |
c5d79adb N |
3172 | clear_bit(Faulty, &rdev->flags); |
3173 | clear_bit(WriteMostly, &rdev->flags); | |
c303da6d | 3174 | set_bit(In_sync, &rdev->flags); |
00bcb4ac | 3175 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
c303da6d | 3176 | } |
014236d2 N |
3177 | return len; |
3178 | } | |
3179 | ||
014236d2 | 3180 | static struct rdev_sysfs_entry rdev_slot = |
80ca3a44 | 3181 | __ATTR(slot, S_IRUGO|S_IWUSR, slot_show, slot_store); |
014236d2 | 3182 | |
93c8cad0 | 3183 | static ssize_t |
3cb03002 | 3184 | offset_show(struct md_rdev *rdev, char *page) |
93c8cad0 | 3185 | { |
6961ece4 | 3186 | return sprintf(page, "%llu\n", (unsigned long long)rdev->data_offset); |
93c8cad0 N |
3187 | } |
3188 | ||
3189 | static ssize_t | |
3cb03002 | 3190 | offset_store(struct md_rdev *rdev, const char *buf, size_t len) |
93c8cad0 | 3191 | { |
c6563a8c | 3192 | unsigned long long offset; |
b29bebd6 | 3193 | if (kstrtoull(buf, 10, &offset) < 0) |
93c8cad0 | 3194 | return -EINVAL; |
8ed0a521 | 3195 | if (rdev->mddev->pers && rdev->raid_disk >= 0) |
93c8cad0 | 3196 | return -EBUSY; |
dd8ac336 | 3197 | if (rdev->sectors && rdev->mddev->external) |
c5d79adb N |
3198 | /* Must set offset before size, so overlap checks |
3199 | * can be sane */ | |
3200 | return -EBUSY; | |
93c8cad0 | 3201 | rdev->data_offset = offset; |
25f7fd47 | 3202 | rdev->new_data_offset = offset; |
93c8cad0 N |
3203 | return len; |
3204 | } | |
3205 | ||
3206 | static struct rdev_sysfs_entry rdev_offset = | |
80ca3a44 | 3207 | __ATTR(offset, S_IRUGO|S_IWUSR, offset_show, offset_store); |
93c8cad0 | 3208 | |
c6563a8c N |
3209 | static ssize_t new_offset_show(struct md_rdev *rdev, char *page) |
3210 | { | |
3211 | return sprintf(page, "%llu\n", | |
3212 | (unsigned long long)rdev->new_data_offset); | |
3213 | } | |
3214 | ||
3215 | static ssize_t new_offset_store(struct md_rdev *rdev, | |
3216 | const char *buf, size_t len) | |
3217 | { | |
3218 | unsigned long long new_offset; | |
3219 | struct mddev *mddev = rdev->mddev; | |
3220 | ||
b29bebd6 | 3221 | if (kstrtoull(buf, 10, &new_offset) < 0) |
c6563a8c N |
3222 | return -EINVAL; |
3223 | ||
f851b60d N |
3224 | if (mddev->sync_thread || |
3225 | test_bit(MD_RECOVERY_RUNNING,&mddev->recovery)) | |
c6563a8c N |
3226 | return -EBUSY; |
3227 | if (new_offset == rdev->data_offset) | |
3228 | /* reset is always permitted */ | |
3229 | ; | |
3230 | else if (new_offset > rdev->data_offset) { | |
3231 | /* must not push array size beyond rdev_sectors */ | |
3232 | if (new_offset - rdev->data_offset | |
3233 | + mddev->dev_sectors > rdev->sectors) | |
3234 | return -E2BIG; | |
3235 | } | |
3236 | /* Metadata worries about other space details. */ | |
3237 | ||
3238 | /* decreasing the offset is inconsistent with a backwards | |
3239 | * reshape. | |
3240 | */ | |
3241 | if (new_offset < rdev->data_offset && | |
3242 | mddev->reshape_backwards) | |
3243 | return -EINVAL; | |
3244 | /* Increasing offset is inconsistent with forwards | |
3245 | * reshape. reshape_direction should be set to | |
3246 | * 'backwards' first. | |
3247 | */ | |
3248 | if (new_offset > rdev->data_offset && | |
3249 | !mddev->reshape_backwards) | |
3250 | return -EINVAL; | |
3251 | ||
3252 | if (mddev->pers && mddev->persistent && | |
3253 | !super_types[mddev->major_version] | |
3254 | .allow_new_offset(rdev, new_offset)) | |
3255 | return -E2BIG; | |
3256 | rdev->new_data_offset = new_offset; | |
3257 | if (new_offset > rdev->data_offset) | |
3258 | mddev->reshape_backwards = 1; | |
3259 | else if (new_offset < rdev->data_offset) | |
3260 | mddev->reshape_backwards = 0; | |
3261 | ||
3262 | return len; | |
3263 | } | |
3264 | static struct rdev_sysfs_entry rdev_new_offset = | |
3265 | __ATTR(new_offset, S_IRUGO|S_IWUSR, new_offset_show, new_offset_store); | |
3266 | ||
83303b61 | 3267 | static ssize_t |
3cb03002 | 3268 | rdev_size_show(struct md_rdev *rdev, char *page) |
83303b61 | 3269 | { |
dd8ac336 | 3270 | return sprintf(page, "%llu\n", (unsigned long long)rdev->sectors / 2); |
83303b61 N |
3271 | } |
3272 | ||
2652a1bd | 3273 | static int md_rdevs_overlap(struct md_rdev *a, struct md_rdev *b) |
c5d79adb N |
3274 | { |
3275 | /* check if two start/length pairs overlap */ | |
2652a1bd CH |
3276 | if (a->data_offset + a->sectors <= b->data_offset) |
3277 | return false; | |
3278 | if (b->data_offset + b->sectors <= a->data_offset) | |
3279 | return false; | |
3280 | return true; | |
3281 | } | |
3282 | ||
3283 | static bool md_rdev_overlaps(struct md_rdev *rdev) | |
3284 | { | |
3285 | struct mddev *mddev; | |
3286 | struct md_rdev *rdev2; | |
3287 | ||
3288 | spin_lock(&all_mddevs_lock); | |
3289 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) { | |
12a6caf2 CH |
3290 | if (test_bit(MD_DELETED, &mddev->flags)) |
3291 | continue; | |
2652a1bd CH |
3292 | rdev_for_each(rdev2, mddev) { |
3293 | if (rdev != rdev2 && rdev->bdev == rdev2->bdev && | |
3294 | md_rdevs_overlap(rdev, rdev2)) { | |
3295 | spin_unlock(&all_mddevs_lock); | |
3296 | return true; | |
3297 | } | |
3298 | } | |
3299 | } | |
3300 | spin_unlock(&all_mddevs_lock); | |
3301 | return false; | |
c5d79adb N |
3302 | } |
3303 | ||
b522adcd DW |
3304 | static int strict_blocks_to_sectors(const char *buf, sector_t *sectors) |
3305 | { | |
3306 | unsigned long long blocks; | |
3307 | sector_t new; | |
3308 | ||
b29bebd6 | 3309 | if (kstrtoull(buf, 10, &blocks) < 0) |
b522adcd DW |
3310 | return -EINVAL; |
3311 | ||
3312 | if (blocks & 1ULL << (8 * sizeof(blocks) - 1)) | |
3313 | return -EINVAL; /* sector conversion overflow */ | |
3314 | ||
3315 | new = blocks * 2; | |
3316 | if (new != blocks * 2) | |
3317 | return -EINVAL; /* unsigned long long to sector_t overflow */ | |
3318 | ||
3319 | *sectors = new; | |
3320 | return 0; | |
3321 | } | |
3322 | ||
83303b61 | 3323 | static ssize_t |
3cb03002 | 3324 | rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len) |
83303b61 | 3325 | { |
fd01b88c | 3326 | struct mddev *my_mddev = rdev->mddev; |
dd8ac336 | 3327 | sector_t oldsectors = rdev->sectors; |
b522adcd | 3328 | sector_t sectors; |
27c529bb | 3329 | |
f2076e7d SL |
3330 | if (test_bit(Journal, &rdev->flags)) |
3331 | return -EBUSY; | |
b522adcd | 3332 | if (strict_blocks_to_sectors(buf, §ors) < 0) |
d7027458 | 3333 | return -EINVAL; |
c6563a8c N |
3334 | if (rdev->data_offset != rdev->new_data_offset) |
3335 | return -EINVAL; /* too confusing */ | |
0cd17fec | 3336 | if (my_mddev->pers && rdev->raid_disk >= 0) { |
d7027458 | 3337 | if (my_mddev->persistent) { |
dd8ac336 AN |
3338 | sectors = super_types[my_mddev->major_version]. |
3339 | rdev_size_change(rdev, sectors); | |
3340 | if (!sectors) | |
0cd17fec | 3341 | return -EBUSY; |
dd8ac336 | 3342 | } else if (!sectors) |
0fe80347 | 3343 | sectors = bdev_nr_sectors(rdev->bdev) - |
dd8ac336 | 3344 | rdev->data_offset; |
a6468539 N |
3345 | if (!my_mddev->pers->resize) |
3346 | /* Cannot change size for RAID0 or Linear etc */ | |
3347 | return -EINVAL; | |
0cd17fec | 3348 | } |
dd8ac336 | 3349 | if (sectors < my_mddev->dev_sectors) |
7d3c6f87 | 3350 | return -EINVAL; /* component must fit device */ |
0cd17fec | 3351 | |
dd8ac336 | 3352 | rdev->sectors = sectors; |
2652a1bd CH |
3353 | |
3354 | /* | |
3355 | * Check that all other rdevs with the same bdev do not overlap. This | |
3356 | * check does not provide a hard guarantee, it just helps avoid | |
3357 | * dangerous mistakes. | |
3358 | */ | |
3359 | if (sectors > oldsectors && my_mddev->external && | |
3360 | md_rdev_overlaps(rdev)) { | |
3361 | /* | |
3362 | * Someone else could have slipped in a size change here, but | |
3363 | * doing so is just silly. We put oldsectors back because we | |
3364 | * know it is safe, and trust userspace not to race with itself. | |
c5d79adb | 3365 | */ |
2652a1bd CH |
3366 | rdev->sectors = oldsectors; |
3367 | return -EBUSY; | |
c5d79adb | 3368 | } |
83303b61 N |
3369 | return len; |
3370 | } | |
3371 | ||
3372 | static struct rdev_sysfs_entry rdev_size = | |
80ca3a44 | 3373 | __ATTR(size, S_IRUGO|S_IWUSR, rdev_size_show, rdev_size_store); |
83303b61 | 3374 | |
3cb03002 | 3375 | static ssize_t recovery_start_show(struct md_rdev *rdev, char *page) |
06e3c817 DW |
3376 | { |
3377 | unsigned long long recovery_start = rdev->recovery_offset; | |
3378 | ||
3379 | if (test_bit(In_sync, &rdev->flags) || | |
3380 | recovery_start == MaxSector) | |
3381 | return sprintf(page, "none\n"); | |
3382 | ||
3383 | return sprintf(page, "%llu\n", recovery_start); | |
3384 | } | |
3385 | ||
3cb03002 | 3386 | static ssize_t recovery_start_store(struct md_rdev *rdev, const char *buf, size_t len) |
06e3c817 DW |
3387 | { |
3388 | unsigned long long recovery_start; | |
3389 | ||
3390 | if (cmd_match(buf, "none")) | |
3391 | recovery_start = MaxSector; | |
b29bebd6 | 3392 | else if (kstrtoull(buf, 10, &recovery_start)) |
06e3c817 DW |
3393 | return -EINVAL; |
3394 | ||
3395 | if (rdev->mddev->pers && | |
3396 | rdev->raid_disk >= 0) | |
3397 | return -EBUSY; | |
3398 | ||
3399 | rdev->recovery_offset = recovery_start; | |
3400 | if (recovery_start == MaxSector) | |
3401 | set_bit(In_sync, &rdev->flags); | |
3402 | else | |
3403 | clear_bit(In_sync, &rdev->flags); | |
3404 | return len; | |
3405 | } | |
3406 | ||
3407 | static struct rdev_sysfs_entry rdev_recovery_start = | |
3408 | __ATTR(recovery_start, S_IRUGO|S_IWUSR, recovery_start_show, recovery_start_store); | |
3409 | ||
fc974ee2 VV |
3410 | /* sysfs access to bad-blocks list. |
3411 | * We present two files. | |
3412 | * 'bad-blocks' lists sector numbers and lengths of ranges that | |
3413 | * are recorded as bad. The list is truncated to fit within | |
3414 | * the one-page limit of sysfs. | |
3415 | * Writing "sector length" to this file adds an acknowledged | |
3416 | * bad block list. | |
3417 | * 'unacknowledged-bad-blocks' lists bad blocks that have not yet | |
3418 | * been acknowledged. Writing to this file adds bad blocks | |
3419 | * without acknowledging them. This is largely for testing. | |
3420 | */ | |
3cb03002 | 3421 | static ssize_t bb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3422 | { |
3423 | return badblocks_show(&rdev->badblocks, page, 0); | |
3424 | } | |
3cb03002 | 3425 | static ssize_t bb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 | 3426 | { |
de393cde N |
3427 | int rv = badblocks_store(&rdev->badblocks, page, len, 0); |
3428 | /* Maybe that ack was all we needed */ | |
3429 | if (test_and_clear_bit(BlockedBadBlocks, &rdev->flags)) | |
3430 | wake_up(&rdev->blocked_wait); | |
3431 | return rv; | |
16c791a5 N |
3432 | } |
3433 | static struct rdev_sysfs_entry rdev_bad_blocks = | |
3434 | __ATTR(bad_blocks, S_IRUGO|S_IWUSR, bb_show, bb_store); | |
3435 | ||
3cb03002 | 3436 | static ssize_t ubb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3437 | { |
3438 | return badblocks_show(&rdev->badblocks, page, 1); | |
3439 | } | |
3cb03002 | 3440 | static ssize_t ubb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 N |
3441 | { |
3442 | return badblocks_store(&rdev->badblocks, page, len, 1); | |
3443 | } | |
3444 | static struct rdev_sysfs_entry rdev_unack_bad_blocks = | |
3445 | __ATTR(unacknowledged_bad_blocks, S_IRUGO|S_IWUSR, ubb_show, ubb_store); | |
3446 | ||
664aed04 AP |
3447 | static ssize_t |
3448 | ppl_sector_show(struct md_rdev *rdev, char *page) | |
3449 | { | |
3450 | return sprintf(page, "%llu\n", (unsigned long long)rdev->ppl.sector); | |
3451 | } | |
3452 | ||
3453 | static ssize_t | |
3454 | ppl_sector_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3455 | { | |
3456 | unsigned long long sector; | |
3457 | ||
3458 | if (kstrtoull(buf, 10, §or) < 0) | |
3459 | return -EINVAL; | |
3460 | if (sector != (sector_t)sector) | |
3461 | return -EINVAL; | |
3462 | ||
3463 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3464 | rdev->raid_disk >= 0) | |
3465 | return -EBUSY; | |
3466 | ||
3467 | if (rdev->mddev->persistent) { | |
3468 | if (rdev->mddev->major_version == 0) | |
3469 | return -EINVAL; | |
3470 | if ((sector > rdev->sb_start && | |
3471 | sector - rdev->sb_start > S16_MAX) || | |
3472 | (sector < rdev->sb_start && | |
3473 | rdev->sb_start - sector > -S16_MIN)) | |
3474 | return -EINVAL; | |
3475 | rdev->ppl.offset = sector - rdev->sb_start; | |
3476 | } else if (!rdev->mddev->external) { | |
3477 | return -EBUSY; | |
3478 | } | |
3479 | rdev->ppl.sector = sector; | |
3480 | return len; | |
3481 | } | |
3482 | ||
3483 | static struct rdev_sysfs_entry rdev_ppl_sector = | |
3484 | __ATTR(ppl_sector, S_IRUGO|S_IWUSR, ppl_sector_show, ppl_sector_store); | |
3485 | ||
3486 | static ssize_t | |
3487 | ppl_size_show(struct md_rdev *rdev, char *page) | |
3488 | { | |
3489 | return sprintf(page, "%u\n", rdev->ppl.size); | |
3490 | } | |
3491 | ||
3492 | static ssize_t | |
3493 | ppl_size_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3494 | { | |
3495 | unsigned int size; | |
3496 | ||
3497 | if (kstrtouint(buf, 10, &size) < 0) | |
3498 | return -EINVAL; | |
3499 | ||
3500 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3501 | rdev->raid_disk >= 0) | |
3502 | return -EBUSY; | |
3503 | ||
3504 | if (rdev->mddev->persistent) { | |
3505 | if (rdev->mddev->major_version == 0) | |
3506 | return -EINVAL; | |
3507 | if (size > U16_MAX) | |
3508 | return -EINVAL; | |
3509 | } else if (!rdev->mddev->external) { | |
3510 | return -EBUSY; | |
3511 | } | |
3512 | rdev->ppl.size = size; | |
3513 | return len; | |
3514 | } | |
3515 | ||
3516 | static struct rdev_sysfs_entry rdev_ppl_size = | |
3517 | __ATTR(ppl_size, S_IRUGO|S_IWUSR, ppl_size_show, ppl_size_store); | |
3518 | ||
86e6ffdd N |
3519 | static struct attribute *rdev_default_attrs[] = { |
3520 | &rdev_state.attr, | |
4dbcdc75 | 3521 | &rdev_errors.attr, |
014236d2 | 3522 | &rdev_slot.attr, |
93c8cad0 | 3523 | &rdev_offset.attr, |
c6563a8c | 3524 | &rdev_new_offset.attr, |
83303b61 | 3525 | &rdev_size.attr, |
06e3c817 | 3526 | &rdev_recovery_start.attr, |
16c791a5 N |
3527 | &rdev_bad_blocks.attr, |
3528 | &rdev_unack_bad_blocks.attr, | |
664aed04 AP |
3529 | &rdev_ppl_sector.attr, |
3530 | &rdev_ppl_size.attr, | |
86e6ffdd N |
3531 | NULL, |
3532 | }; | |
1745e857 | 3533 | ATTRIBUTE_GROUPS(rdev_default); |
86e6ffdd N |
3534 | static ssize_t |
3535 | rdev_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
3536 | { | |
3537 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3538 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
86e6ffdd N |
3539 | |
3540 | if (!entry->show) | |
3541 | return -EIO; | |
758bfc8a | 3542 | if (!rdev->mddev) |
168b305b | 3543 | return -ENODEV; |
758bfc8a | 3544 | return entry->show(rdev, page); |
86e6ffdd N |
3545 | } |
3546 | ||
3547 | static ssize_t | |
3548 | rdev_attr_store(struct kobject *kobj, struct attribute *attr, | |
3549 | const char *page, size_t length) | |
3550 | { | |
3551 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3552 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
3ce94ce5 | 3553 | struct kernfs_node *kn = NULL; |
27c529bb | 3554 | ssize_t rv; |
fd01b88c | 3555 | struct mddev *mddev = rdev->mddev; |
86e6ffdd N |
3556 | |
3557 | if (!entry->store) | |
3558 | return -EIO; | |
67463acb N |
3559 | if (!capable(CAP_SYS_ADMIN)) |
3560 | return -EACCES; | |
3ce94ce5 YK |
3561 | |
3562 | if (entry->store == state_store && cmd_match(page, "remove")) | |
3563 | kn = sysfs_break_active_protection(kobj, attr); | |
3564 | ||
c42d3240 | 3565 | rv = mddev ? mddev_lock(mddev) : -ENODEV; |
ca388059 | 3566 | if (!rv) { |
27c529bb | 3567 | if (rdev->mddev == NULL) |
c42d3240 | 3568 | rv = -ENODEV; |
27c529bb N |
3569 | else |
3570 | rv = entry->store(rdev, page, length); | |
6a51830e | 3571 | mddev_unlock(mddev); |
ca388059 | 3572 | } |
3ce94ce5 YK |
3573 | |
3574 | if (kn) | |
3575 | sysfs_unbreak_active_protection(kn); | |
3576 | ||
ca388059 | 3577 | return rv; |
86e6ffdd N |
3578 | } |
3579 | ||
3580 | static void rdev_free(struct kobject *ko) | |
3581 | { | |
3cb03002 | 3582 | struct md_rdev *rdev = container_of(ko, struct md_rdev, kobj); |
86e6ffdd N |
3583 | kfree(rdev); |
3584 | } | |
52cf25d0 | 3585 | static const struct sysfs_ops rdev_sysfs_ops = { |
86e6ffdd N |
3586 | .show = rdev_attr_show, |
3587 | .store = rdev_attr_store, | |
3588 | }; | |
4d72a9de | 3589 | static const struct kobj_type rdev_ktype = { |
86e6ffdd N |
3590 | .release = rdev_free, |
3591 | .sysfs_ops = &rdev_sysfs_ops, | |
1745e857 | 3592 | .default_groups = rdev_default_groups, |
86e6ffdd N |
3593 | }; |
3594 | ||
3cb03002 | 3595 | int md_rdev_init(struct md_rdev *rdev) |
e8bb9a83 N |
3596 | { |
3597 | rdev->desc_nr = -1; | |
3598 | rdev->saved_raid_disk = -1; | |
3599 | rdev->raid_disk = -1; | |
3600 | rdev->flags = 0; | |
3601 | rdev->data_offset = 0; | |
c6563a8c | 3602 | rdev->new_data_offset = 0; |
e8bb9a83 | 3603 | rdev->sb_events = 0; |
0e3ef49e | 3604 | rdev->last_read_error = 0; |
2699b672 N |
3605 | rdev->sb_loaded = 0; |
3606 | rdev->bb_page = NULL; | |
e8bb9a83 N |
3607 | atomic_set(&rdev->nr_pending, 0); |
3608 | atomic_set(&rdev->read_errors, 0); | |
3609 | atomic_set(&rdev->corrected_errors, 0); | |
3610 | ||
3611 | INIT_LIST_HEAD(&rdev->same_set); | |
3612 | init_waitqueue_head(&rdev->blocked_wait); | |
2230dfe4 N |
3613 | |
3614 | /* Add space to store bad block list. | |
3615 | * This reserves the space even on arrays where it cannot | |
3616 | * be used - I wonder if that matters | |
3617 | */ | |
fc974ee2 | 3618 | return badblocks_init(&rdev->badblocks, 0); |
e8bb9a83 N |
3619 | } |
3620 | EXPORT_SYMBOL_GPL(md_rdev_init); | |
2736e8ee | 3621 | |
1da177e4 LT |
3622 | /* |
3623 | * Import a device. If 'super_format' >= 0, then sanity check the superblock | |
3624 | * | |
3625 | * mark the device faulty if: | |
3626 | * | |
3627 | * - the device is nonexistent (zero size) | |
3628 | * - the device has no valid superblock | |
3629 | * | |
3630 | * a faulty rdev _never_ has rdev->sb set. | |
3631 | */ | |
3cb03002 | 3632 | static struct md_rdev *md_import_device(dev_t newdev, int super_format, int super_minor) |
1da177e4 | 3633 | { |
3cb03002 | 3634 | struct md_rdev *rdev; |
1da177e4 | 3635 | sector_t size; |
fb541ca4 | 3636 | int err; |
1da177e4 | 3637 | |
9ffae0cf | 3638 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
9d48739e | 3639 | if (!rdev) |
1da177e4 | 3640 | return ERR_PTR(-ENOMEM); |
1da177e4 | 3641 | |
2230dfe4 N |
3642 | err = md_rdev_init(rdev); |
3643 | if (err) | |
fb541ca4 | 3644 | goto out_free_rdev; |
2230dfe4 N |
3645 | err = alloc_disk_sb(rdev); |
3646 | if (err) | |
fb541ca4 | 3647 | goto out_clear_rdev; |
1da177e4 | 3648 | |
9f0f5a30 JK |
3649 | rdev->bdev_handle = bdev_open_by_dev(newdev, |
3650 | BLK_OPEN_READ | BLK_OPEN_WRITE, | |
3651 | super_format == -2 ? &claim_rdev : rdev, NULL); | |
3652 | if (IS_ERR(rdev->bdev_handle)) { | |
fb541ca4 CH |
3653 | pr_warn("md: could not open device unknown-block(%u,%u).\n", |
3654 | MAJOR(newdev), MINOR(newdev)); | |
9f0f5a30 | 3655 | err = PTR_ERR(rdev->bdev_handle); |
fb541ca4 CH |
3656 | goto out_clear_rdev; |
3657 | } | |
9f0f5a30 | 3658 | rdev->bdev = rdev->bdev_handle->bdev; |
1da177e4 | 3659 | |
f9cb074b | 3660 | kobject_init(&rdev->kobj, &rdev_ktype); |
86e6ffdd | 3661 | |
0fe80347 | 3662 | size = bdev_nr_bytes(rdev->bdev) >> BLOCK_SIZE_BITS; |
1da177e4 | 3663 | if (!size) { |
913cce5a CH |
3664 | pr_warn("md: %pg has zero or unknown size, marking faulty!\n", |
3665 | rdev->bdev); | |
1da177e4 | 3666 | err = -EINVAL; |
fb541ca4 | 3667 | goto out_blkdev_put; |
1da177e4 LT |
3668 | } |
3669 | ||
3670 | if (super_format >= 0) { | |
3671 | err = super_types[super_format]. | |
3672 | load_super(rdev, NULL, super_minor); | |
3673 | if (err == -EINVAL) { | |
913cce5a CH |
3674 | pr_warn("md: %pg does not have a valid v%d.%d superblock, not importing!\n", |
3675 | rdev->bdev, | |
9d48739e | 3676 | super_format, super_minor); |
fb541ca4 | 3677 | goto out_blkdev_put; |
1da177e4 LT |
3678 | } |
3679 | if (err < 0) { | |
913cce5a CH |
3680 | pr_warn("md: could not read %pg's sb, not importing!\n", |
3681 | rdev->bdev); | |
fb541ca4 | 3682 | goto out_blkdev_put; |
1da177e4 LT |
3683 | } |
3684 | } | |
6bfe0b49 | 3685 | |
1da177e4 LT |
3686 | return rdev; |
3687 | ||
fb541ca4 | 3688 | out_blkdev_put: |
9f0f5a30 | 3689 | bdev_release(rdev->bdev_handle); |
fb541ca4 | 3690 | out_clear_rdev: |
545c8795 | 3691 | md_rdev_clear(rdev); |
fb541ca4 | 3692 | out_free_rdev: |
1da177e4 LT |
3693 | kfree(rdev); |
3694 | return ERR_PTR(err); | |
3695 | } | |
3696 | ||
3697 | /* | |
3698 | * Check a full RAID array for plausibility | |
3699 | */ | |
3700 | ||
6a5cb53a | 3701 | static int analyze_sbs(struct mddev *mddev) |
1da177e4 LT |
3702 | { |
3703 | int i; | |
3cb03002 | 3704 | struct md_rdev *rdev, *freshest, *tmp; |
1da177e4 LT |
3705 | |
3706 | freshest = NULL; | |
dafb20fa | 3707 | rdev_for_each_safe(rdev, tmp, mddev) |
1da177e4 LT |
3708 | switch (super_types[mddev->major_version]. |
3709 | load_super(rdev, freshest, mddev->minor_version)) { | |
3710 | case 1: | |
3711 | freshest = rdev; | |
3712 | break; | |
3713 | case 0: | |
3714 | break; | |
3715 | default: | |
913cce5a CH |
3716 | pr_warn("md: fatal superblock inconsistency in %pg -- removing from array\n", |
3717 | rdev->bdev); | |
fb56dfef | 3718 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3719 | } |
3720 | ||
6a5cb53a YY |
3721 | /* Cannot find a valid fresh disk */ |
3722 | if (!freshest) { | |
3723 | pr_warn("md: cannot find a valid disk\n"); | |
3724 | return -EINVAL; | |
3725 | } | |
3726 | ||
1da177e4 LT |
3727 | super_types[mddev->major_version]. |
3728 | validate_super(mddev, freshest); | |
3729 | ||
3730 | i = 0; | |
dafb20fa | 3731 | rdev_for_each_safe(rdev, tmp, mddev) { |
233fca36 N |
3732 | if (mddev->max_disks && |
3733 | (rdev->desc_nr >= mddev->max_disks || | |
3734 | i > mddev->max_disks)) { | |
913cce5a CH |
3735 | pr_warn("md: %s: %pg: only %d devices permitted\n", |
3736 | mdname(mddev), rdev->bdev, | |
9d48739e | 3737 | mddev->max_disks); |
fb56dfef | 3738 | md_kick_rdev_from_array(rdev); |
de01dfad N |
3739 | continue; |
3740 | } | |
1aee41f6 | 3741 | if (rdev != freshest) { |
1da177e4 LT |
3742 | if (super_types[mddev->major_version]. |
3743 | validate_super(mddev, rdev)) { | |
913cce5a CH |
3744 | pr_warn("md: kicking non-fresh %pg from array!\n", |
3745 | rdev->bdev); | |
fb56dfef | 3746 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3747 | continue; |
3748 | } | |
1aee41f6 | 3749 | } |
1da177e4 LT |
3750 | if (mddev->level == LEVEL_MULTIPATH) { |
3751 | rdev->desc_nr = i++; | |
3752 | rdev->raid_disk = rdev->desc_nr; | |
b2d444d7 | 3753 | set_bit(In_sync, &rdev->flags); |
f2076e7d SL |
3754 | } else if (rdev->raid_disk >= |
3755 | (mddev->raid_disks - min(0, mddev->delta_disks)) && | |
3756 | !test_bit(Journal, &rdev->flags)) { | |
a778b73f N |
3757 | rdev->raid_disk = -1; |
3758 | clear_bit(In_sync, &rdev->flags); | |
1da177e4 LT |
3759 | } |
3760 | } | |
6a5cb53a YY |
3761 | |
3762 | return 0; | |
1da177e4 LT |
3763 | } |
3764 | ||
72e02075 N |
3765 | /* Read a fixed-point number. |
3766 | * Numbers in sysfs attributes should be in "standard" units where | |
3767 | * possible, so time should be in seconds. | |
f72ffdd6 | 3768 | * However we internally use a a much smaller unit such as |
72e02075 N |
3769 | * milliseconds or jiffies. |
3770 | * This function takes a decimal number with a possible fractional | |
3771 | * component, and produces an integer which is the result of | |
3772 | * multiplying that number by 10^'scale'. | |
3773 | * all without any floating-point arithmetic. | |
3774 | */ | |
3775 | int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale) | |
3776 | { | |
3777 | unsigned long result = 0; | |
3778 | long decimals = -1; | |
3779 | while (isdigit(*cp) || (*cp == '.' && decimals < 0)) { | |
3780 | if (*cp == '.') | |
3781 | decimals = 0; | |
3782 | else if (decimals < scale) { | |
3783 | unsigned int value; | |
3784 | value = *cp - '0'; | |
3785 | result = result * 10 + value; | |
3786 | if (decimals >= 0) | |
3787 | decimals++; | |
3788 | } | |
3789 | cp++; | |
3790 | } | |
3791 | if (*cp == '\n') | |
3792 | cp++; | |
3793 | if (*cp) | |
3794 | return -EINVAL; | |
3795 | if (decimals < 0) | |
3796 | decimals = 0; | |
cf891607 | 3797 | *res = result * int_pow(10, scale - decimals); |
72e02075 N |
3798 | return 0; |
3799 | } | |
3800 | ||
16f17b39 | 3801 | static ssize_t |
fd01b88c | 3802 | safe_delay_show(struct mddev *mddev, char *page) |
16f17b39 | 3803 | { |
6beb489b LN |
3804 | unsigned int msec = ((unsigned long)mddev->safemode_delay*1000)/HZ; |
3805 | ||
3806 | return sprintf(page, "%u.%03u\n", msec/1000, msec%1000); | |
16f17b39 N |
3807 | } |
3808 | static ssize_t | |
fd01b88c | 3809 | safe_delay_store(struct mddev *mddev, const char *cbuf, size_t len) |
16f17b39 | 3810 | { |
16f17b39 | 3811 | unsigned long msec; |
97ce0a7f | 3812 | |
28c1b9fd | 3813 | if (mddev_is_clustered(mddev)) { |
9d48739e | 3814 | pr_warn("md: Safemode is disabled for clustered mode\n"); |
28c1b9fd GR |
3815 | return -EINVAL; |
3816 | } | |
3817 | ||
6beb489b | 3818 | if (strict_strtoul_scaled(cbuf, &msec, 3) < 0 || msec > UINT_MAX / HZ) |
16f17b39 | 3819 | return -EINVAL; |
16f17b39 N |
3820 | if (msec == 0) |
3821 | mddev->safemode_delay = 0; | |
3822 | else { | |
19052c0e | 3823 | unsigned long old_delay = mddev->safemode_delay; |
1b30e66f N |
3824 | unsigned long new_delay = (msec*HZ)/1000; |
3825 | ||
3826 | if (new_delay == 0) | |
3827 | new_delay = 1; | |
3828 | mddev->safemode_delay = new_delay; | |
3829 | if (new_delay < old_delay || old_delay == 0) | |
3830 | mod_timer(&mddev->safemode_timer, jiffies+1); | |
16f17b39 N |
3831 | } |
3832 | return len; | |
3833 | } | |
3834 | static struct md_sysfs_entry md_safe_delay = | |
80ca3a44 | 3835 | __ATTR(safe_mode_delay, S_IRUGO|S_IWUSR,safe_delay_show, safe_delay_store); |
16f17b39 | 3836 | |
eae1701f | 3837 | static ssize_t |
fd01b88c | 3838 | level_show(struct mddev *mddev, char *page) |
eae1701f | 3839 | { |
36d091f4 N |
3840 | struct md_personality *p; |
3841 | int ret; | |
3842 | spin_lock(&mddev->lock); | |
3843 | p = mddev->pers; | |
d9d166c2 | 3844 | if (p) |
36d091f4 | 3845 | ret = sprintf(page, "%s\n", p->name); |
d9d166c2 | 3846 | else if (mddev->clevel[0]) |
36d091f4 | 3847 | ret = sprintf(page, "%s\n", mddev->clevel); |
d9d166c2 | 3848 | else if (mddev->level != LEVEL_NONE) |
36d091f4 | 3849 | ret = sprintf(page, "%d\n", mddev->level); |
d9d166c2 | 3850 | else |
36d091f4 N |
3851 | ret = 0; |
3852 | spin_unlock(&mddev->lock); | |
3853 | return ret; | |
eae1701f N |
3854 | } |
3855 | ||
d9d166c2 | 3856 | static ssize_t |
fd01b88c | 3857 | level_store(struct mddev *mddev, const char *buf, size_t len) |
d9d166c2 | 3858 | { |
f2859af6 | 3859 | char clevel[16]; |
6791875e N |
3860 | ssize_t rv; |
3861 | size_t slen = len; | |
db721d32 | 3862 | struct md_personality *pers, *oldpers; |
f2859af6 | 3863 | long level; |
db721d32 | 3864 | void *priv, *oldpriv; |
3cb03002 | 3865 | struct md_rdev *rdev; |
245f46c2 | 3866 | |
6791875e N |
3867 | if (slen == 0 || slen >= sizeof(clevel)) |
3868 | return -EINVAL; | |
3869 | ||
3870 | rv = mddev_lock(mddev); | |
3871 | if (rv) | |
3872 | return rv; | |
3873 | ||
245f46c2 | 3874 | if (mddev->pers == NULL) { |
6791875e N |
3875 | strncpy(mddev->clevel, buf, slen); |
3876 | if (mddev->clevel[slen-1] == '\n') | |
3877 | slen--; | |
3878 | mddev->clevel[slen] = 0; | |
245f46c2 | 3879 | mddev->level = LEVEL_NONE; |
6791875e N |
3880 | rv = len; |
3881 | goto out_unlock; | |
245f46c2 | 3882 | } |
6791875e | 3883 | rv = -EROFS; |
f97a5528 | 3884 | if (!md_is_rdwr(mddev)) |
6791875e | 3885 | goto out_unlock; |
245f46c2 N |
3886 | |
3887 | /* request to change the personality. Need to ensure: | |
3888 | * - array is not engaged in resync/recovery/reshape | |
3889 | * - old personality can be suspended | |
3890 | * - new personality will access other array. | |
3891 | */ | |
3892 | ||
6791875e | 3893 | rv = -EBUSY; |
bb4f1e9d | 3894 | if (mddev->sync_thread || |
f851b60d | 3895 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
bb4f1e9d N |
3896 | mddev->reshape_position != MaxSector || |
3897 | mddev->sysfs_active) | |
6791875e | 3898 | goto out_unlock; |
245f46c2 | 3899 | |
6791875e | 3900 | rv = -EINVAL; |
245f46c2 | 3901 | if (!mddev->pers->quiesce) { |
9d48739e N |
3902 | pr_warn("md: %s: %s does not support online personality change\n", |
3903 | mdname(mddev), mddev->pers->name); | |
6791875e | 3904 | goto out_unlock; |
245f46c2 N |
3905 | } |
3906 | ||
3907 | /* Now find the new personality */ | |
6791875e N |
3908 | strncpy(clevel, buf, slen); |
3909 | if (clevel[slen-1] == '\n') | |
3910 | slen--; | |
3911 | clevel[slen] = 0; | |
b29bebd6 | 3912 | if (kstrtol(clevel, 10, &level)) |
f2859af6 | 3913 | level = LEVEL_NONE; |
245f46c2 | 3914 | |
f2859af6 DW |
3915 | if (request_module("md-%s", clevel) != 0) |
3916 | request_module("md-level-%s", clevel); | |
245f46c2 | 3917 | spin_lock(&pers_lock); |
f2859af6 | 3918 | pers = find_pers(level, clevel); |
245f46c2 N |
3919 | if (!pers || !try_module_get(pers->owner)) { |
3920 | spin_unlock(&pers_lock); | |
9d48739e | 3921 | pr_warn("md: personality %s not loaded\n", clevel); |
6791875e N |
3922 | rv = -EINVAL; |
3923 | goto out_unlock; | |
245f46c2 N |
3924 | } |
3925 | spin_unlock(&pers_lock); | |
3926 | ||
3927 | if (pers == mddev->pers) { | |
3928 | /* Nothing to do! */ | |
3929 | module_put(pers->owner); | |
6791875e N |
3930 | rv = len; |
3931 | goto out_unlock; | |
245f46c2 N |
3932 | } |
3933 | if (!pers->takeover) { | |
3934 | module_put(pers->owner); | |
9d48739e N |
3935 | pr_warn("md: %s: %s does not support personality takeover\n", |
3936 | mdname(mddev), clevel); | |
6791875e N |
3937 | rv = -EINVAL; |
3938 | goto out_unlock; | |
245f46c2 N |
3939 | } |
3940 | ||
dafb20fa | 3941 | rdev_for_each(rdev, mddev) |
e93f68a1 N |
3942 | rdev->new_raid_disk = rdev->raid_disk; |
3943 | ||
245f46c2 N |
3944 | /* ->takeover must set new_* and/or delta_disks |
3945 | * if it succeeds, and may set them when it fails. | |
3946 | */ | |
3947 | priv = pers->takeover(mddev); | |
3948 | if (IS_ERR(priv)) { | |
3949 | mddev->new_level = mddev->level; | |
3950 | mddev->new_layout = mddev->layout; | |
664e7c41 | 3951 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
245f46c2 N |
3952 | mddev->raid_disks -= mddev->delta_disks; |
3953 | mddev->delta_disks = 0; | |
2c810cdd | 3954 | mddev->reshape_backwards = 0; |
245f46c2 | 3955 | module_put(pers->owner); |
9d48739e N |
3956 | pr_warn("md: %s: %s would not accept array\n", |
3957 | mdname(mddev), clevel); | |
6791875e N |
3958 | rv = PTR_ERR(priv); |
3959 | goto out_unlock; | |
245f46c2 N |
3960 | } |
3961 | ||
3962 | /* Looks like we have a winner */ | |
3963 | mddev_suspend(mddev); | |
5aa61f42 | 3964 | mddev_detach(mddev); |
36d091f4 N |
3965 | |
3966 | spin_lock(&mddev->lock); | |
db721d32 N |
3967 | oldpers = mddev->pers; |
3968 | oldpriv = mddev->private; | |
3969 | mddev->pers = pers; | |
3970 | mddev->private = priv; | |
92d9aac9 | 3971 | strscpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
db721d32 N |
3972 | mddev->level = mddev->new_level; |
3973 | mddev->layout = mddev->new_layout; | |
3974 | mddev->chunk_sectors = mddev->new_chunk_sectors; | |
3975 | mddev->delta_disks = 0; | |
3976 | mddev->reshape_backwards = 0; | |
3977 | mddev->degraded = 0; | |
36d091f4 | 3978 | spin_unlock(&mddev->lock); |
db721d32 N |
3979 | |
3980 | if (oldpers->sync_request == NULL && | |
3981 | mddev->external) { | |
3982 | /* We are converting from a no-redundancy array | |
3983 | * to a redundancy array and metadata is managed | |
3984 | * externally so we need to be sure that writes | |
3985 | * won't block due to a need to transition | |
3986 | * clean->dirty | |
3987 | * until external management is started. | |
3988 | */ | |
3989 | mddev->in_sync = 0; | |
3990 | mddev->safemode_delay = 0; | |
3991 | mddev->safemode = 0; | |
3992 | } | |
f72ffdd6 | 3993 | |
db721d32 N |
3994 | oldpers->free(mddev, oldpriv); |
3995 | ||
3996 | if (oldpers->sync_request == NULL && | |
a64c876f N |
3997 | pers->sync_request != NULL) { |
3998 | /* need to add the md_redundancy_group */ | |
3999 | if (sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
4000 | pr_warn("md: cannot register extra attributes for %s\n", |
4001 | mdname(mddev)); | |
388975cc | 4002 | mddev->sysfs_action = sysfs_get_dirent(mddev->kobj.sd, "sync_action"); |
e8efa9b8 JB |
4003 | mddev->sysfs_completed = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_completed"); |
4004 | mddev->sysfs_degraded = sysfs_get_dirent_safe(mddev->kobj.sd, "degraded"); | |
f72ffdd6 | 4005 | } |
db721d32 | 4006 | if (oldpers->sync_request != NULL && |
a64c876f N |
4007 | pers->sync_request == NULL) { |
4008 | /* need to remove the md_redundancy_group */ | |
4009 | if (mddev->to_remove == NULL) | |
4010 | mddev->to_remove = &md_redundancy_group; | |
4011 | } | |
4012 | ||
4cb9da7d AO |
4013 | module_put(oldpers->owner); |
4014 | ||
dafb20fa | 4015 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
4016 | if (rdev->raid_disk < 0) |
4017 | continue; | |
bf2cb0da | 4018 | if (rdev->new_raid_disk >= mddev->raid_disks) |
e93f68a1 N |
4019 | rdev->new_raid_disk = -1; |
4020 | if (rdev->new_raid_disk == rdev->raid_disk) | |
4021 | continue; | |
36fad858 | 4022 | sysfs_unlink_rdev(mddev, rdev); |
e93f68a1 | 4023 | } |
dafb20fa | 4024 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
4025 | if (rdev->raid_disk < 0) |
4026 | continue; | |
4027 | if (rdev->new_raid_disk == rdev->raid_disk) | |
4028 | continue; | |
4029 | rdev->raid_disk = rdev->new_raid_disk; | |
4030 | if (rdev->raid_disk < 0) | |
3a981b03 | 4031 | clear_bit(In_sync, &rdev->flags); |
e93f68a1 | 4032 | else { |
36fad858 | 4033 | if (sysfs_link_rdev(mddev, rdev)) |
9d48739e N |
4034 | pr_warn("md: cannot register rd%d for %s after level change\n", |
4035 | rdev->raid_disk, mdname(mddev)); | |
3a981b03 | 4036 | } |
e93f68a1 N |
4037 | } |
4038 | ||
db721d32 | 4039 | if (pers->sync_request == NULL) { |
9af204cf TM |
4040 | /* this is now an array without redundancy, so |
4041 | * it must always be in_sync | |
4042 | */ | |
4043 | mddev->in_sync = 1; | |
4044 | del_timer_sync(&mddev->safemode_timer); | |
4045 | } | |
02e5f5c0 | 4046 | blk_set_stacking_limits(&mddev->queue->limits); |
245f46c2 | 4047 | pers->run(mddev); |
2953079c | 4048 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
47525e59 | 4049 | mddev_resume(mddev); |
830778a1 N |
4050 | if (!mddev->thread) |
4051 | md_update_sb(mddev, 1); | |
e1a86dbb | 4052 | sysfs_notify_dirent_safe(mddev->sysfs_level); |
54679486 | 4053 | md_new_event(); |
6791875e N |
4054 | rv = len; |
4055 | out_unlock: | |
4056 | mddev_unlock(mddev); | |
d9d166c2 N |
4057 | return rv; |
4058 | } | |
4059 | ||
4060 | static struct md_sysfs_entry md_level = | |
80ca3a44 | 4061 | __ATTR(level, S_IRUGO|S_IWUSR, level_show, level_store); |
eae1701f | 4062 | |
d4dbd025 | 4063 | static ssize_t |
fd01b88c | 4064 | layout_show(struct mddev *mddev, char *page) |
d4dbd025 N |
4065 | { |
4066 | /* just a number, not meaningful for all levels */ | |
08a02ecd N |
4067 | if (mddev->reshape_position != MaxSector && |
4068 | mddev->layout != mddev->new_layout) | |
4069 | return sprintf(page, "%d (%d)\n", | |
4070 | mddev->new_layout, mddev->layout); | |
d4dbd025 N |
4071 | return sprintf(page, "%d\n", mddev->layout); |
4072 | } | |
4073 | ||
4074 | static ssize_t | |
fd01b88c | 4075 | layout_store(struct mddev *mddev, const char *buf, size_t len) |
d4dbd025 | 4076 | { |
4c9309c0 | 4077 | unsigned int n; |
6791875e | 4078 | int err; |
d4dbd025 | 4079 | |
4c9309c0 AD |
4080 | err = kstrtouint(buf, 10, &n); |
4081 | if (err < 0) | |
4082 | return err; | |
6791875e N |
4083 | err = mddev_lock(mddev); |
4084 | if (err) | |
4085 | return err; | |
d4dbd025 | 4086 | |
b3546035 | 4087 | if (mddev->pers) { |
50ac168a | 4088 | if (mddev->pers->check_reshape == NULL) |
6791875e | 4089 | err = -EBUSY; |
f97a5528 | 4090 | else if (!md_is_rdwr(mddev)) |
6791875e N |
4091 | err = -EROFS; |
4092 | else { | |
4093 | mddev->new_layout = n; | |
4094 | err = mddev->pers->check_reshape(mddev); | |
4095 | if (err) | |
4096 | mddev->new_layout = mddev->layout; | |
597a711b | 4097 | } |
b3546035 | 4098 | } else { |
08a02ecd | 4099 | mddev->new_layout = n; |
b3546035 N |
4100 | if (mddev->reshape_position == MaxSector) |
4101 | mddev->layout = n; | |
4102 | } | |
6791875e N |
4103 | mddev_unlock(mddev); |
4104 | return err ?: len; | |
d4dbd025 N |
4105 | } |
4106 | static struct md_sysfs_entry md_layout = | |
80ca3a44 | 4107 | __ATTR(layout, S_IRUGO|S_IWUSR, layout_show, layout_store); |
d4dbd025 | 4108 | |
eae1701f | 4109 | static ssize_t |
fd01b88c | 4110 | raid_disks_show(struct mddev *mddev, char *page) |
eae1701f | 4111 | { |
bb636547 N |
4112 | if (mddev->raid_disks == 0) |
4113 | return 0; | |
08a02ecd N |
4114 | if (mddev->reshape_position != MaxSector && |
4115 | mddev->delta_disks != 0) | |
4116 | return sprintf(page, "%d (%d)\n", mddev->raid_disks, | |
4117 | mddev->raid_disks - mddev->delta_disks); | |
eae1701f N |
4118 | return sprintf(page, "%d\n", mddev->raid_disks); |
4119 | } | |
4120 | ||
fd01b88c | 4121 | static int update_raid_disks(struct mddev *mddev, int raid_disks); |
da943b99 N |
4122 | |
4123 | static ssize_t | |
fd01b88c | 4124 | raid_disks_store(struct mddev *mddev, const char *buf, size_t len) |
da943b99 | 4125 | { |
4c9309c0 | 4126 | unsigned int n; |
6791875e | 4127 | int err; |
da943b99 | 4128 | |
4c9309c0 AD |
4129 | err = kstrtouint(buf, 10, &n); |
4130 | if (err < 0) | |
4131 | return err; | |
da943b99 | 4132 | |
6791875e N |
4133 | err = mddev_lock(mddev); |
4134 | if (err) | |
4135 | return err; | |
da943b99 | 4136 | if (mddev->pers) |
6791875e | 4137 | err = update_raid_disks(mddev, n); |
08a02ecd | 4138 | else if (mddev->reshape_position != MaxSector) { |
c6563a8c | 4139 | struct md_rdev *rdev; |
08a02ecd | 4140 | int olddisks = mddev->raid_disks - mddev->delta_disks; |
c6563a8c | 4141 | |
6791875e | 4142 | err = -EINVAL; |
c6563a8c N |
4143 | rdev_for_each(rdev, mddev) { |
4144 | if (olddisks < n && | |
4145 | rdev->data_offset < rdev->new_data_offset) | |
6791875e | 4146 | goto out_unlock; |
c6563a8c N |
4147 | if (olddisks > n && |
4148 | rdev->data_offset > rdev->new_data_offset) | |
6791875e | 4149 | goto out_unlock; |
c6563a8c | 4150 | } |
6791875e | 4151 | err = 0; |
08a02ecd N |
4152 | mddev->delta_disks = n - olddisks; |
4153 | mddev->raid_disks = n; | |
2c810cdd | 4154 | mddev->reshape_backwards = (mddev->delta_disks < 0); |
08a02ecd | 4155 | } else |
da943b99 | 4156 | mddev->raid_disks = n; |
6791875e N |
4157 | out_unlock: |
4158 | mddev_unlock(mddev); | |
4159 | return err ? err : len; | |
da943b99 N |
4160 | } |
4161 | static struct md_sysfs_entry md_raid_disks = | |
80ca3a44 | 4162 | __ATTR(raid_disks, S_IRUGO|S_IWUSR, raid_disks_show, raid_disks_store); |
eae1701f | 4163 | |
ec164d07 SP |
4164 | static ssize_t |
4165 | uuid_show(struct mddev *mddev, char *page) | |
4166 | { | |
4167 | return sprintf(page, "%pU\n", mddev->uuid); | |
4168 | } | |
4169 | static struct md_sysfs_entry md_uuid = | |
4170 | __ATTR(uuid, S_IRUGO, uuid_show, NULL); | |
4171 | ||
3b34380a | 4172 | static ssize_t |
fd01b88c | 4173 | chunk_size_show(struct mddev *mddev, char *page) |
3b34380a | 4174 | { |
08a02ecd | 4175 | if (mddev->reshape_position != MaxSector && |
664e7c41 AN |
4176 | mddev->chunk_sectors != mddev->new_chunk_sectors) |
4177 | return sprintf(page, "%d (%d)\n", | |
4178 | mddev->new_chunk_sectors << 9, | |
9d8f0363 AN |
4179 | mddev->chunk_sectors << 9); |
4180 | return sprintf(page, "%d\n", mddev->chunk_sectors << 9); | |
3b34380a N |
4181 | } |
4182 | ||
4183 | static ssize_t | |
fd01b88c | 4184 | chunk_size_store(struct mddev *mddev, const char *buf, size_t len) |
3b34380a | 4185 | { |
4c9309c0 | 4186 | unsigned long n; |
6791875e | 4187 | int err; |
3b34380a | 4188 | |
4c9309c0 AD |
4189 | err = kstrtoul(buf, 10, &n); |
4190 | if (err < 0) | |
4191 | return err; | |
3b34380a | 4192 | |
6791875e N |
4193 | err = mddev_lock(mddev); |
4194 | if (err) | |
4195 | return err; | |
b3546035 | 4196 | if (mddev->pers) { |
50ac168a | 4197 | if (mddev->pers->check_reshape == NULL) |
6791875e | 4198 | err = -EBUSY; |
f97a5528 | 4199 | else if (!md_is_rdwr(mddev)) |
6791875e N |
4200 | err = -EROFS; |
4201 | else { | |
4202 | mddev->new_chunk_sectors = n >> 9; | |
4203 | err = mddev->pers->check_reshape(mddev); | |
4204 | if (err) | |
4205 | mddev->new_chunk_sectors = mddev->chunk_sectors; | |
597a711b | 4206 | } |
b3546035 | 4207 | } else { |
664e7c41 | 4208 | mddev->new_chunk_sectors = n >> 9; |
b3546035 | 4209 | if (mddev->reshape_position == MaxSector) |
9d8f0363 | 4210 | mddev->chunk_sectors = n >> 9; |
b3546035 | 4211 | } |
6791875e N |
4212 | mddev_unlock(mddev); |
4213 | return err ?: len; | |
3b34380a N |
4214 | } |
4215 | static struct md_sysfs_entry md_chunk_size = | |
80ca3a44 | 4216 | __ATTR(chunk_size, S_IRUGO|S_IWUSR, chunk_size_show, chunk_size_store); |
3b34380a | 4217 | |
a94213b1 | 4218 | static ssize_t |
fd01b88c | 4219 | resync_start_show(struct mddev *mddev, char *page) |
a94213b1 | 4220 | { |
d1a7c503 N |
4221 | if (mddev->recovery_cp == MaxSector) |
4222 | return sprintf(page, "none\n"); | |
a94213b1 N |
4223 | return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp); |
4224 | } | |
4225 | ||
4226 | static ssize_t | |
fd01b88c | 4227 | resync_start_store(struct mddev *mddev, const char *buf, size_t len) |
a94213b1 | 4228 | { |
4c9309c0 | 4229 | unsigned long long n; |
6791875e | 4230 | int err; |
4c9309c0 AD |
4231 | |
4232 | if (cmd_match(buf, "none")) | |
4233 | n = MaxSector; | |
4234 | else { | |
4235 | err = kstrtoull(buf, 10, &n); | |
4236 | if (err < 0) | |
4237 | return err; | |
4238 | if (n != (sector_t)n) | |
4239 | return -EINVAL; | |
4240 | } | |
a94213b1 | 4241 | |
6791875e N |
4242 | err = mddev_lock(mddev); |
4243 | if (err) | |
4244 | return err; | |
b098636c | 4245 | if (mddev->pers && !test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) |
6791875e | 4246 | err = -EBUSY; |
a94213b1 | 4247 | |
6791875e N |
4248 | if (!err) { |
4249 | mddev->recovery_cp = n; | |
4250 | if (mddev->pers) | |
2953079c | 4251 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
6791875e N |
4252 | } |
4253 | mddev_unlock(mddev); | |
4254 | return err ?: len; | |
a94213b1 N |
4255 | } |
4256 | static struct md_sysfs_entry md_resync_start = | |
750f199e N |
4257 | __ATTR_PREALLOC(resync_start, S_IRUGO|S_IWUSR, |
4258 | resync_start_show, resync_start_store); | |
a94213b1 | 4259 | |
9e653b63 N |
4260 | /* |
4261 | * The array state can be: | |
4262 | * | |
4263 | * clear | |
4264 | * No devices, no size, no level | |
4265 | * Equivalent to STOP_ARRAY ioctl | |
4266 | * inactive | |
4267 | * May have some settings, but array is not active | |
4268 | * all IO results in error | |
4269 | * When written, doesn't tear down array, but just stops it | |
4270 | * suspended (not supported yet) | |
4271 | * All IO requests will block. The array can be reconfigured. | |
910d8cb3 | 4272 | * Writing this, if accepted, will block until array is quiescent |
9e653b63 N |
4273 | * readonly |
4274 | * no resync can happen. no superblocks get written. | |
4275 | * write requests fail | |
4276 | * read-auto | |
4277 | * like readonly, but behaves like 'clean' on a write request. | |
4278 | * | |
4279 | * clean - no pending writes, but otherwise active. | |
4280 | * When written to inactive array, starts without resync | |
4281 | * If a write request arrives then | |
4282 | * if metadata is known, mark 'dirty' and switch to 'active'. | |
4283 | * if not known, block and switch to write-pending | |
4284 | * If written to an active array that has pending writes, then fails. | |
4285 | * active | |
4286 | * fully active: IO and resync can be happening. | |
4287 | * When written to inactive array, starts with resync | |
4288 | * | |
4289 | * write-pending | |
4290 | * clean, but writes are blocked waiting for 'active' to be written. | |
4291 | * | |
4292 | * active-idle | |
4293 | * like active, but no writes have been seen for a while (100msec). | |
4294 | * | |
62f7b198 | 4295 | * broken |
9631abdb MT |
4296 | * Array is failed. It's useful because mounted-arrays aren't stopped |
4297 | * when array is failed, so this state will at least alert the user that | |
4298 | * something is wrong. | |
9e653b63 N |
4299 | */ |
4300 | enum array_state { clear, inactive, suspended, readonly, read_auto, clean, active, | |
62f7b198 | 4301 | write_pending, active_idle, broken, bad_word}; |
05381954 | 4302 | static char *array_states[] = { |
9e653b63 | 4303 | "clear", "inactive", "suspended", "readonly", "read-auto", "clean", "active", |
62f7b198 | 4304 | "write-pending", "active-idle", "broken", NULL }; |
9e653b63 N |
4305 | |
4306 | static int match_word(const char *word, char **list) | |
4307 | { | |
4308 | int n; | |
4309 | for (n=0; list[n]; n++) | |
4310 | if (cmd_match(word, list[n])) | |
4311 | break; | |
4312 | return n; | |
4313 | } | |
4314 | ||
4315 | static ssize_t | |
fd01b88c | 4316 | array_state_show(struct mddev *mddev, char *page) |
9e653b63 N |
4317 | { |
4318 | enum array_state st = inactive; | |
4319 | ||
62f7b198 | 4320 | if (mddev->pers && !test_bit(MD_NOT_READY, &mddev->flags)) { |
9e653b63 | 4321 | switch(mddev->ro) { |
f97a5528 | 4322 | case MD_RDONLY: |
9e653b63 N |
4323 | st = readonly; |
4324 | break; | |
f97a5528 | 4325 | case MD_AUTO_READ: |
9e653b63 N |
4326 | st = read_auto; |
4327 | break; | |
f97a5528 | 4328 | case MD_RDWR: |
55cc39f3 | 4329 | spin_lock(&mddev->lock); |
2953079c | 4330 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
e691063a | 4331 | st = write_pending; |
16f88949 TM |
4332 | else if (mddev->in_sync) |
4333 | st = clean; | |
9e653b63 N |
4334 | else if (mddev->safemode) |
4335 | st = active_idle; | |
4336 | else | |
4337 | st = active; | |
55cc39f3 | 4338 | spin_unlock(&mddev->lock); |
9e653b63 | 4339 | } |
62f7b198 GP |
4340 | |
4341 | if (test_bit(MD_BROKEN, &mddev->flags) && st == clean) | |
4342 | st = broken; | |
4343 | } else { | |
9e653b63 N |
4344 | if (list_empty(&mddev->disks) && |
4345 | mddev->raid_disks == 0 && | |
58c0fed4 | 4346 | mddev->dev_sectors == 0) |
9e653b63 N |
4347 | st = clear; |
4348 | else | |
4349 | st = inactive; | |
4350 | } | |
4351 | return sprintf(page, "%s\n", array_states[st]); | |
4352 | } | |
4353 | ||
f72ffdd6 N |
4354 | static int do_md_stop(struct mddev *mddev, int ro, struct block_device *bdev); |
4355 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev); | |
fd01b88c | 4356 | static int restart_array(struct mddev *mddev); |
9e653b63 N |
4357 | |
4358 | static ssize_t | |
fd01b88c | 4359 | array_state_store(struct mddev *mddev, const char *buf, size_t len) |
9e653b63 | 4360 | { |
6497709b | 4361 | int err = 0; |
9e653b63 | 4362 | enum array_state st = match_word(buf, array_states); |
6791875e | 4363 | |
f97a5528 YB |
4364 | if (mddev->pers && (st == active || st == clean) && |
4365 | mddev->ro != MD_RDONLY) { | |
6791875e N |
4366 | /* don't take reconfig_mutex when toggling between |
4367 | * clean and active | |
4368 | */ | |
4369 | spin_lock(&mddev->lock); | |
4370 | if (st == active) { | |
4371 | restart_array(mddev); | |
2953079c | 4372 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
91a6c4ad | 4373 | md_wakeup_thread(mddev->thread); |
6791875e | 4374 | wake_up(&mddev->sb_wait); |
6791875e N |
4375 | } else /* st == clean */ { |
4376 | restart_array(mddev); | |
6497709b | 4377 | if (!set_in_sync(mddev)) |
6791875e N |
4378 | err = -EBUSY; |
4379 | } | |
573275b5 TM |
4380 | if (!err) |
4381 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
6791875e | 4382 | spin_unlock(&mddev->lock); |
c008f1d3 | 4383 | return err ?: len; |
6791875e N |
4384 | } |
4385 | err = mddev_lock(mddev); | |
4386 | if (err) | |
4387 | return err; | |
4388 | err = -EINVAL; | |
9e653b63 N |
4389 | switch(st) { |
4390 | case bad_word: | |
4391 | break; | |
4392 | case clear: | |
4393 | /* stopping an active array */ | |
a05b7ea0 | 4394 | err = do_md_stop(mddev, 0, NULL); |
9e653b63 N |
4395 | break; |
4396 | case inactive: | |
4397 | /* stopping an active array */ | |
90cf195d | 4398 | if (mddev->pers) |
a05b7ea0 | 4399 | err = do_md_stop(mddev, 2, NULL); |
90cf195d | 4400 | else |
e691063a | 4401 | err = 0; /* already inactive */ |
9e653b63 N |
4402 | break; |
4403 | case suspended: | |
4404 | break; /* not supported yet */ | |
4405 | case readonly: | |
4406 | if (mddev->pers) | |
a05b7ea0 | 4407 | err = md_set_readonly(mddev, NULL); |
9e653b63 | 4408 | else { |
f97a5528 | 4409 | mddev->ro = MD_RDONLY; |
648b629e | 4410 | set_disk_ro(mddev->gendisk, 1); |
9e653b63 N |
4411 | err = do_md_run(mddev); |
4412 | } | |
4413 | break; | |
4414 | case read_auto: | |
9e653b63 | 4415 | if (mddev->pers) { |
f97a5528 | 4416 | if (md_is_rdwr(mddev)) |
a05b7ea0 | 4417 | err = md_set_readonly(mddev, NULL); |
f97a5528 | 4418 | else if (mddev->ro == MD_RDONLY) |
648b629e N |
4419 | err = restart_array(mddev); |
4420 | if (err == 0) { | |
f97a5528 | 4421 | mddev->ro = MD_AUTO_READ; |
648b629e N |
4422 | set_disk_ro(mddev->gendisk, 0); |
4423 | } | |
9e653b63 | 4424 | } else { |
f97a5528 | 4425 | mddev->ro = MD_AUTO_READ; |
9e653b63 N |
4426 | err = do_md_run(mddev); |
4427 | } | |
4428 | break; | |
4429 | case clean: | |
4430 | if (mddev->pers) { | |
339421de SL |
4431 | err = restart_array(mddev); |
4432 | if (err) | |
4433 | break; | |
85572d7c | 4434 | spin_lock(&mddev->lock); |
6497709b | 4435 | if (!set_in_sync(mddev)) |
e691063a | 4436 | err = -EBUSY; |
85572d7c | 4437 | spin_unlock(&mddev->lock); |
5bf29597 N |
4438 | } else |
4439 | err = -EINVAL; | |
9e653b63 N |
4440 | break; |
4441 | case active: | |
4442 | if (mddev->pers) { | |
339421de SL |
4443 | err = restart_array(mddev); |
4444 | if (err) | |
4445 | break; | |
2953079c | 4446 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
9e653b63 N |
4447 | wake_up(&mddev->sb_wait); |
4448 | err = 0; | |
4449 | } else { | |
f97a5528 | 4450 | mddev->ro = MD_RDWR; |
648b629e | 4451 | set_disk_ro(mddev->gendisk, 0); |
9e653b63 N |
4452 | err = do_md_run(mddev); |
4453 | } | |
4454 | break; | |
4455 | case write_pending: | |
4456 | case active_idle: | |
62f7b198 | 4457 | case broken: |
9e653b63 N |
4458 | /* these cannot be set */ |
4459 | break; | |
4460 | } | |
6791875e N |
4461 | |
4462 | if (!err) { | |
1d23f178 N |
4463 | if (mddev->hold_active == UNTIL_IOCTL) |
4464 | mddev->hold_active = 0; | |
00bcb4ac | 4465 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 4466 | } |
6791875e N |
4467 | mddev_unlock(mddev); |
4468 | return err ?: len; | |
9e653b63 | 4469 | } |
80ca3a44 | 4470 | static struct md_sysfs_entry md_array_state = |
750f199e | 4471 | __ATTR_PREALLOC(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store); |
9e653b63 | 4472 | |
1e50915f | 4473 | static ssize_t |
fd01b88c | 4474 | max_corrected_read_errors_show(struct mddev *mddev, char *page) { |
1e50915f RB |
4475 | return sprintf(page, "%d\n", |
4476 | atomic_read(&mddev->max_corr_read_errors)); | |
4477 | } | |
4478 | ||
4479 | static ssize_t | |
fd01b88c | 4480 | max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len) |
1e50915f | 4481 | { |
4c9309c0 AD |
4482 | unsigned int n; |
4483 | int rv; | |
1e50915f | 4484 | |
4c9309c0 AD |
4485 | rv = kstrtouint(buf, 10, &n); |
4486 | if (rv < 0) | |
4487 | return rv; | |
f8b20a40 LN |
4488 | if (n > INT_MAX) |
4489 | return -EINVAL; | |
4c9309c0 AD |
4490 | atomic_set(&mddev->max_corr_read_errors, n); |
4491 | return len; | |
1e50915f RB |
4492 | } |
4493 | ||
4494 | static struct md_sysfs_entry max_corr_read_errors = | |
4495 | __ATTR(max_read_errors, S_IRUGO|S_IWUSR, max_corrected_read_errors_show, | |
4496 | max_corrected_read_errors_store); | |
4497 | ||
6d7ff738 | 4498 | static ssize_t |
fd01b88c | 4499 | null_show(struct mddev *mddev, char *page) |
6d7ff738 N |
4500 | { |
4501 | return -EINVAL; | |
4502 | } | |
4503 | ||
4504 | static ssize_t | |
fd01b88c | 4505 | new_dev_store(struct mddev *mddev, const char *buf, size_t len) |
6d7ff738 N |
4506 | { |
4507 | /* buf must be %d:%d\n? giving major and minor numbers */ | |
4508 | /* The new device is added to the array. | |
4509 | * If the array has a persistent superblock, we read the | |
4510 | * superblock to initialise info and check validity. | |
4511 | * Otherwise, only checking done is that in bind_rdev_to_array, | |
4512 | * which mainly checks size. | |
4513 | */ | |
4514 | char *e; | |
4515 | int major = simple_strtoul(buf, &e, 10); | |
4516 | int minor; | |
4517 | dev_t dev; | |
3cb03002 | 4518 | struct md_rdev *rdev; |
6d7ff738 N |
4519 | int err; |
4520 | ||
4521 | if (!*buf || *e != ':' || !e[1] || e[1] == '\n') | |
4522 | return -EINVAL; | |
4523 | minor = simple_strtoul(e+1, &e, 10); | |
4524 | if (*e && *e != '\n') | |
4525 | return -EINVAL; | |
4526 | dev = MKDEV(major, minor); | |
4527 | if (major != MAJOR(dev) || | |
4528 | minor != MINOR(dev)) | |
4529 | return -EOVERFLOW; | |
4530 | ||
6791875e N |
4531 | err = mddev_lock(mddev); |
4532 | if (err) | |
4533 | return err; | |
6d7ff738 N |
4534 | if (mddev->persistent) { |
4535 | rdev = md_import_device(dev, mddev->major_version, | |
4536 | mddev->minor_version); | |
4537 | if (!IS_ERR(rdev) && !list_empty(&mddev->disks)) { | |
3cb03002 N |
4538 | struct md_rdev *rdev0 |
4539 | = list_entry(mddev->disks.next, | |
4540 | struct md_rdev, same_set); | |
6d7ff738 N |
4541 | err = super_types[mddev->major_version] |
4542 | .load_super(rdev, rdev0, mddev->minor_version); | |
4543 | if (err < 0) | |
4544 | goto out; | |
4545 | } | |
c5d79adb N |
4546 | } else if (mddev->external) |
4547 | rdev = md_import_device(dev, -2, -1); | |
4548 | else | |
6d7ff738 N |
4549 | rdev = md_import_device(dev, -1, -1); |
4550 | ||
9a8c0fa8 N |
4551 | if (IS_ERR(rdev)) { |
4552 | mddev_unlock(mddev); | |
6d7ff738 | 4553 | return PTR_ERR(rdev); |
9a8c0fa8 | 4554 | } |
6d7ff738 N |
4555 | err = bind_rdev_to_array(rdev, mddev); |
4556 | out: | |
4557 | if (err) | |
2736e8ee | 4558 | export_rdev(rdev, mddev); |
6791875e | 4559 | mddev_unlock(mddev); |
5492c46e | 4560 | if (!err) |
54679486 | 4561 | md_new_event(); |
6d7ff738 N |
4562 | return err ? err : len; |
4563 | } | |
4564 | ||
4565 | static struct md_sysfs_entry md_new_device = | |
80ca3a44 | 4566 | __ATTR(new_dev, S_IWUSR, null_show, new_dev_store); |
3b34380a | 4567 | |
9b1d1dac | 4568 | static ssize_t |
fd01b88c | 4569 | bitmap_store(struct mddev *mddev, const char *buf, size_t len) |
9b1d1dac PC |
4570 | { |
4571 | char *end; | |
4572 | unsigned long chunk, end_chunk; | |
6791875e | 4573 | int err; |
9b1d1dac | 4574 | |
6791875e N |
4575 | err = mddev_lock(mddev); |
4576 | if (err) | |
4577 | return err; | |
9b1d1dac PC |
4578 | if (!mddev->bitmap) |
4579 | goto out; | |
4580 | /* buf should be <chunk> <chunk> ... or <chunk>-<chunk> ... (range) */ | |
4581 | while (*buf) { | |
4582 | chunk = end_chunk = simple_strtoul(buf, &end, 0); | |
4583 | if (buf == end) break; | |
4584 | if (*end == '-') { /* range */ | |
4585 | buf = end + 1; | |
4586 | end_chunk = simple_strtoul(buf, &end, 0); | |
4587 | if (buf == end) break; | |
4588 | } | |
4589 | if (*end && !isspace(*end)) break; | |
e64e4018 | 4590 | md_bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk); |
e7d2860b | 4591 | buf = skip_spaces(end); |
9b1d1dac | 4592 | } |
e64e4018 | 4593 | md_bitmap_unplug(mddev->bitmap); /* flush the bits to disk */ |
9b1d1dac | 4594 | out: |
6791875e | 4595 | mddev_unlock(mddev); |
9b1d1dac PC |
4596 | return len; |
4597 | } | |
4598 | ||
4599 | static struct md_sysfs_entry md_bitmap = | |
4600 | __ATTR(bitmap_set_bits, S_IWUSR, null_show, bitmap_store); | |
4601 | ||
a35b0d69 | 4602 | static ssize_t |
fd01b88c | 4603 | size_show(struct mddev *mddev, char *page) |
a35b0d69 | 4604 | { |
58c0fed4 AN |
4605 | return sprintf(page, "%llu\n", |
4606 | (unsigned long long)mddev->dev_sectors / 2); | |
a35b0d69 N |
4607 | } |
4608 | ||
fd01b88c | 4609 | static int update_size(struct mddev *mddev, sector_t num_sectors); |
a35b0d69 N |
4610 | |
4611 | static ssize_t | |
fd01b88c | 4612 | size_store(struct mddev *mddev, const char *buf, size_t len) |
a35b0d69 N |
4613 | { |
4614 | /* If array is inactive, we can reduce the component size, but | |
4615 | * not increase it (except from 0). | |
4616 | * If array is active, we can try an on-line resize | |
4617 | */ | |
b522adcd DW |
4618 | sector_t sectors; |
4619 | int err = strict_blocks_to_sectors(buf, §ors); | |
a35b0d69 | 4620 | |
58c0fed4 AN |
4621 | if (err < 0) |
4622 | return err; | |
6791875e N |
4623 | err = mddev_lock(mddev); |
4624 | if (err) | |
4625 | return err; | |
a35b0d69 | 4626 | if (mddev->pers) { |
58c0fed4 | 4627 | err = update_size(mddev, sectors); |
4ba1e788 XN |
4628 | if (err == 0) |
4629 | md_update_sb(mddev, 1); | |
a35b0d69 | 4630 | } else { |
58c0fed4 AN |
4631 | if (mddev->dev_sectors == 0 || |
4632 | mddev->dev_sectors > sectors) | |
4633 | mddev->dev_sectors = sectors; | |
a35b0d69 N |
4634 | else |
4635 | err = -ENOSPC; | |
4636 | } | |
6791875e | 4637 | mddev_unlock(mddev); |
a35b0d69 N |
4638 | return err ? err : len; |
4639 | } | |
4640 | ||
4641 | static struct md_sysfs_entry md_size = | |
80ca3a44 | 4642 | __ATTR(component_size, S_IRUGO|S_IWUSR, size_show, size_store); |
a35b0d69 | 4643 | |
83f0d77a | 4644 | /* Metadata version. |
e691063a N |
4645 | * This is one of |
4646 | * 'none' for arrays with no metadata (good luck...) | |
4647 | * 'external' for arrays with externally managed metadata, | |
8bb93aac N |
4648 | * or N.M for internally known formats |
4649 | */ | |
4650 | static ssize_t | |
fd01b88c | 4651 | metadata_show(struct mddev *mddev, char *page) |
8bb93aac N |
4652 | { |
4653 | if (mddev->persistent) | |
4654 | return sprintf(page, "%d.%d\n", | |
4655 | mddev->major_version, mddev->minor_version); | |
e691063a N |
4656 | else if (mddev->external) |
4657 | return sprintf(page, "external:%s\n", mddev->metadata_type); | |
8bb93aac N |
4658 | else |
4659 | return sprintf(page, "none\n"); | |
4660 | } | |
4661 | ||
4662 | static ssize_t | |
fd01b88c | 4663 | metadata_store(struct mddev *mddev, const char *buf, size_t len) |
8bb93aac N |
4664 | { |
4665 | int major, minor; | |
4666 | char *e; | |
6791875e | 4667 | int err; |
ea43ddd8 N |
4668 | /* Changing the details of 'external' metadata is |
4669 | * always permitted. Otherwise there must be | |
4670 | * no devices attached to the array. | |
4671 | */ | |
6791875e N |
4672 | |
4673 | err = mddev_lock(mddev); | |
4674 | if (err) | |
4675 | return err; | |
4676 | err = -EBUSY; | |
ea43ddd8 N |
4677 | if (mddev->external && strncmp(buf, "external:", 9) == 0) |
4678 | ; | |
4679 | else if (!list_empty(&mddev->disks)) | |
6791875e | 4680 | goto out_unlock; |
8bb93aac | 4681 | |
6791875e | 4682 | err = 0; |
8bb93aac N |
4683 | if (cmd_match(buf, "none")) { |
4684 | mddev->persistent = 0; | |
e691063a N |
4685 | mddev->external = 0; |
4686 | mddev->major_version = 0; | |
4687 | mddev->minor_version = 90; | |
6791875e | 4688 | goto out_unlock; |
e691063a N |
4689 | } |
4690 | if (strncmp(buf, "external:", 9) == 0) { | |
20a49ff6 | 4691 | size_t namelen = len-9; |
e691063a N |
4692 | if (namelen >= sizeof(mddev->metadata_type)) |
4693 | namelen = sizeof(mddev->metadata_type)-1; | |
4694 | strncpy(mddev->metadata_type, buf+9, namelen); | |
4695 | mddev->metadata_type[namelen] = 0; | |
4696 | if (namelen && mddev->metadata_type[namelen-1] == '\n') | |
4697 | mddev->metadata_type[--namelen] = 0; | |
4698 | mddev->persistent = 0; | |
4699 | mddev->external = 1; | |
8bb93aac N |
4700 | mddev->major_version = 0; |
4701 | mddev->minor_version = 90; | |
6791875e | 4702 | goto out_unlock; |
8bb93aac N |
4703 | } |
4704 | major = simple_strtoul(buf, &e, 10); | |
6791875e | 4705 | err = -EINVAL; |
8bb93aac | 4706 | if (e==buf || *e != '.') |
6791875e | 4707 | goto out_unlock; |
8bb93aac N |
4708 | buf = e+1; |
4709 | minor = simple_strtoul(buf, &e, 10); | |
3f9d7b0d | 4710 | if (e==buf || (*e && *e != '\n') ) |
6791875e N |
4711 | goto out_unlock; |
4712 | err = -ENOENT; | |
50511da3 | 4713 | if (major >= ARRAY_SIZE(super_types) || super_types[major].name == NULL) |
6791875e | 4714 | goto out_unlock; |
8bb93aac N |
4715 | mddev->major_version = major; |
4716 | mddev->minor_version = minor; | |
4717 | mddev->persistent = 1; | |
e691063a | 4718 | mddev->external = 0; |
6791875e N |
4719 | err = 0; |
4720 | out_unlock: | |
4721 | mddev_unlock(mddev); | |
4722 | return err ?: len; | |
8bb93aac N |
4723 | } |
4724 | ||
4725 | static struct md_sysfs_entry md_metadata = | |
750f199e | 4726 | __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store); |
8bb93aac | 4727 | |
24dd469d | 4728 | static ssize_t |
fd01b88c | 4729 | action_show(struct mddev *mddev, char *page) |
24dd469d | 4730 | { |
7eec314d | 4731 | char *type = "idle"; |
b7b17c9b N |
4732 | unsigned long recovery = mddev->recovery; |
4733 | if (test_bit(MD_RECOVERY_FROZEN, &recovery)) | |
b6a9ce68 | 4734 | type = "frozen"; |
b7b17c9b | 4735 | else if (test_bit(MD_RECOVERY_RUNNING, &recovery) || |
f97a5528 | 4736 | (md_is_rdwr(mddev) && test_bit(MD_RECOVERY_NEEDED, &recovery))) { |
b7b17c9b | 4737 | if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) |
ccfcc3c1 | 4738 | type = "reshape"; |
b7b17c9b N |
4739 | else if (test_bit(MD_RECOVERY_SYNC, &recovery)) { |
4740 | if (!test_bit(MD_RECOVERY_REQUESTED, &recovery)) | |
24dd469d | 4741 | type = "resync"; |
b7b17c9b | 4742 | else if (test_bit(MD_RECOVERY_CHECK, &recovery)) |
24dd469d N |
4743 | type = "check"; |
4744 | else | |
4745 | type = "repair"; | |
b7b17c9b | 4746 | } else if (test_bit(MD_RECOVERY_RECOVER, &recovery)) |
24dd469d | 4747 | type = "recover"; |
985ca973 N |
4748 | else if (mddev->reshape_position != MaxSector) |
4749 | type = "reshape"; | |
24dd469d N |
4750 | } |
4751 | return sprintf(page, "%s\n", type); | |
4752 | } | |
4753 | ||
64e5e09a YK |
4754 | static void stop_sync_thread(struct mddev *mddev) |
4755 | { | |
4756 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) | |
4757 | return; | |
4758 | ||
4759 | if (mddev_lock(mddev)) | |
4760 | return; | |
4761 | ||
4762 | /* | |
4763 | * Check again in case MD_RECOVERY_RUNNING is cleared before lock is | |
4764 | * held. | |
4765 | */ | |
4766 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { | |
4767 | mddev_unlock(mddev); | |
4768 | return; | |
4769 | } | |
4770 | ||
4771 | if (work_pending(&mddev->del_work)) | |
4772 | flush_workqueue(md_misc_wq); | |
4773 | ||
130443d6 YK |
4774 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
4775 | /* | |
4776 | * Thread might be blocked waiting for metadata update which will now | |
4777 | * never happen | |
4778 | */ | |
4779 | md_wakeup_thread_directly(mddev->sync_thread); | |
64e5e09a YK |
4780 | |
4781 | mddev_unlock(mddev); | |
4782 | } | |
4783 | ||
4784 | static void idle_sync_thread(struct mddev *mddev) | |
4785 | { | |
130443d6 YK |
4786 | int sync_seq = atomic_read(&mddev->sync_seq); |
4787 | ||
6f56f0c4 | 4788 | mutex_lock(&mddev->sync_mutex); |
64e5e09a YK |
4789 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
4790 | stop_sync_thread(mddev); | |
130443d6 YK |
4791 | |
4792 | wait_event(resync_wait, sync_seq != atomic_read(&mddev->sync_seq) || | |
4793 | !test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)); | |
4794 | ||
6f56f0c4 | 4795 | mutex_unlock(&mddev->sync_mutex); |
64e5e09a YK |
4796 | } |
4797 | ||
4798 | static void frozen_sync_thread(struct mddev *mddev) | |
4799 | { | |
6f56f0c4 | 4800 | mutex_lock(&mddev->sync_mutex); |
64e5e09a YK |
4801 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
4802 | stop_sync_thread(mddev); | |
130443d6 YK |
4803 | |
4804 | wait_event(resync_wait, mddev->sync_thread == NULL && | |
4805 | !test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)); | |
4806 | ||
6f56f0c4 | 4807 | mutex_unlock(&mddev->sync_mutex); |
64e5e09a YK |
4808 | } |
4809 | ||
24dd469d | 4810 | static ssize_t |
fd01b88c | 4811 | action_store(struct mddev *mddev, const char *page, size_t len) |
24dd469d | 4812 | { |
7eec314d N |
4813 | if (!mddev->pers || !mddev->pers->sync_request) |
4814 | return -EINVAL; | |
4815 | ||
b6a9ce68 | 4816 | |
64e5e09a YK |
4817 | if (cmd_match(page, "idle")) |
4818 | idle_sync_thread(mddev); | |
4819 | else if (cmd_match(page, "frozen")) | |
4820 | frozen_sync_thread(mddev); | |
4821 | else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) | |
24dd469d | 4822 | return -EBUSY; |
72a23c21 | 4823 | else if (cmd_match(page, "resync")) |
56ccc112 | 4824 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4825 | else if (cmd_match(page, "recover")) { |
56ccc112 | 4826 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4827 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
72a23c21 | 4828 | } else if (cmd_match(page, "reshape")) { |
16484bf5 N |
4829 | int err; |
4830 | if (mddev->pers->start_reshape == NULL) | |
4831 | return -EINVAL; | |
6791875e N |
4832 | err = mddev_lock(mddev); |
4833 | if (!err) { | |
873f50ec | 4834 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
312045ee | 4835 | err = -EBUSY; |
873f50ec YK |
4836 | } else if (mddev->reshape_position == MaxSector || |
4837 | mddev->pers->check_reshape == NULL || | |
4838 | mddev->pers->check_reshape(mddev)) { | |
312045ee N |
4839 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
4840 | err = mddev->pers->start_reshape(mddev); | |
873f50ec YK |
4841 | } else { |
4842 | /* | |
4843 | * If reshape is still in progress, and | |
4844 | * md_check_recovery() can continue to reshape, | |
4845 | * don't restart reshape because data can be | |
4846 | * corrupted for raid456. | |
4847 | */ | |
4848 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
312045ee | 4849 | } |
6791875e N |
4850 | mddev_unlock(mddev); |
4851 | } | |
16484bf5 N |
4852 | if (err) |
4853 | return err; | |
e1a86dbb | 4854 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
16484bf5 | 4855 | } else { |
bce74dac | 4856 | if (cmd_match(page, "check")) |
7eec314d | 4857 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
2adc7d47 | 4858 | else if (!cmd_match(page, "repair")) |
7eec314d | 4859 | return -EINVAL; |
56ccc112 | 4860 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
7eec314d N |
4861 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
4862 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
7eec314d | 4863 | } |
f97a5528 | 4864 | if (mddev->ro == MD_AUTO_READ) { |
48c26ddc N |
4865 | /* A write to sync_action is enough to justify |
4866 | * canceling read-auto mode | |
4867 | */ | |
f97a5528 | 4868 | mddev->ro = MD_RDWR; |
48c26ddc N |
4869 | md_wakeup_thread(mddev->sync_thread); |
4870 | } | |
03c902e1 | 4871 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
24dd469d | 4872 | md_wakeup_thread(mddev->thread); |
00bcb4ac | 4873 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
24dd469d N |
4874 | return len; |
4875 | } | |
4876 | ||
c4a39551 | 4877 | static struct md_sysfs_entry md_scan_mode = |
750f199e | 4878 | __ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store); |
c4a39551 JB |
4879 | |
4880 | static ssize_t | |
4881 | last_sync_action_show(struct mddev *mddev, char *page) | |
4882 | { | |
4883 | return sprintf(page, "%s\n", mddev->last_sync_action); | |
4884 | } | |
4885 | ||
4886 | static struct md_sysfs_entry md_last_scan_mode = __ATTR_RO(last_sync_action); | |
4887 | ||
9d88883e | 4888 | static ssize_t |
fd01b88c | 4889 | mismatch_cnt_show(struct mddev *mddev, char *page) |
9d88883e N |
4890 | { |
4891 | return sprintf(page, "%llu\n", | |
7f7583d4 JM |
4892 | (unsigned long long) |
4893 | atomic64_read(&mddev->resync_mismatches)); | |
9d88883e N |
4894 | } |
4895 | ||
80ca3a44 | 4896 | static struct md_sysfs_entry md_mismatches = __ATTR_RO(mismatch_cnt); |
9d88883e | 4897 | |
88202a0c | 4898 | static ssize_t |
fd01b88c | 4899 | sync_min_show(struct mddev *mddev, char *page) |
88202a0c N |
4900 | { |
4901 | return sprintf(page, "%d (%s)\n", speed_min(mddev), | |
4902 | mddev->sync_speed_min ? "local": "system"); | |
4903 | } | |
4904 | ||
4905 | static ssize_t | |
fd01b88c | 4906 | sync_min_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4907 | { |
4c9309c0 AD |
4908 | unsigned int min; |
4909 | int rv; | |
4910 | ||
88202a0c | 4911 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4912 | min = 0; |
4913 | } else { | |
4914 | rv = kstrtouint(buf, 10, &min); | |
4915 | if (rv < 0) | |
4916 | return rv; | |
4917 | if (min == 0) | |
4918 | return -EINVAL; | |
88202a0c | 4919 | } |
88202a0c N |
4920 | mddev->sync_speed_min = min; |
4921 | return len; | |
4922 | } | |
4923 | ||
4924 | static struct md_sysfs_entry md_sync_min = | |
4925 | __ATTR(sync_speed_min, S_IRUGO|S_IWUSR, sync_min_show, sync_min_store); | |
4926 | ||
4927 | static ssize_t | |
fd01b88c | 4928 | sync_max_show(struct mddev *mddev, char *page) |
88202a0c N |
4929 | { |
4930 | return sprintf(page, "%d (%s)\n", speed_max(mddev), | |
4931 | mddev->sync_speed_max ? "local": "system"); | |
4932 | } | |
4933 | ||
4934 | static ssize_t | |
fd01b88c | 4935 | sync_max_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4936 | { |
4c9309c0 AD |
4937 | unsigned int max; |
4938 | int rv; | |
4939 | ||
88202a0c | 4940 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4941 | max = 0; |
4942 | } else { | |
4943 | rv = kstrtouint(buf, 10, &max); | |
4944 | if (rv < 0) | |
4945 | return rv; | |
4946 | if (max == 0) | |
4947 | return -EINVAL; | |
88202a0c | 4948 | } |
88202a0c N |
4949 | mddev->sync_speed_max = max; |
4950 | return len; | |
4951 | } | |
4952 | ||
4953 | static struct md_sysfs_entry md_sync_max = | |
4954 | __ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store); | |
4955 | ||
d7f3d291 | 4956 | static ssize_t |
fd01b88c | 4957 | degraded_show(struct mddev *mddev, char *page) |
d7f3d291 IP |
4958 | { |
4959 | return sprintf(page, "%d\n", mddev->degraded); | |
4960 | } | |
4961 | static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded); | |
88202a0c | 4962 | |
90b08710 | 4963 | static ssize_t |
fd01b88c | 4964 | sync_force_parallel_show(struct mddev *mddev, char *page) |
90b08710 BS |
4965 | { |
4966 | return sprintf(page, "%d\n", mddev->parallel_resync); | |
4967 | } | |
4968 | ||
4969 | static ssize_t | |
fd01b88c | 4970 | sync_force_parallel_store(struct mddev *mddev, const char *buf, size_t len) |
90b08710 BS |
4971 | { |
4972 | long n; | |
4973 | ||
b29bebd6 | 4974 | if (kstrtol(buf, 10, &n)) |
90b08710 BS |
4975 | return -EINVAL; |
4976 | ||
4977 | if (n != 0 && n != 1) | |
4978 | return -EINVAL; | |
4979 | ||
4980 | mddev->parallel_resync = n; | |
4981 | ||
4982 | if (mddev->sync_thread) | |
4983 | wake_up(&resync_wait); | |
4984 | ||
4985 | return len; | |
4986 | } | |
4987 | ||
4988 | /* force parallel resync, even with shared block devices */ | |
4989 | static struct md_sysfs_entry md_sync_force_parallel = | |
4990 | __ATTR(sync_force_parallel, S_IRUGO|S_IWUSR, | |
4991 | sync_force_parallel_show, sync_force_parallel_store); | |
4992 | ||
88202a0c | 4993 | static ssize_t |
fd01b88c | 4994 | sync_speed_show(struct mddev *mddev, char *page) |
88202a0c N |
4995 | { |
4996 | unsigned long resync, dt, db; | |
eac58d08 | 4997 | if (mddev->curr_resync == MD_RESYNC_NONE) |
d1a7c503 | 4998 | return sprintf(page, "none\n"); |
9687a60c AN |
4999 | resync = mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active); |
5000 | dt = (jiffies - mddev->resync_mark) / HZ; | |
88202a0c | 5001 | if (!dt) dt++; |
9687a60c AN |
5002 | db = resync - mddev->resync_mark_cnt; |
5003 | return sprintf(page, "%lu\n", db/dt/2); /* K/sec */ | |
88202a0c N |
5004 | } |
5005 | ||
80ca3a44 | 5006 | static struct md_sysfs_entry md_sync_speed = __ATTR_RO(sync_speed); |
88202a0c N |
5007 | |
5008 | static ssize_t | |
fd01b88c | 5009 | sync_completed_show(struct mddev *mddev, char *page) |
88202a0c | 5010 | { |
13ae864b | 5011 | unsigned long long max_sectors, resync; |
88202a0c | 5012 | |
acb180b0 N |
5013 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
5014 | return sprintf(page, "none\n"); | |
5015 | ||
eac58d08 LG |
5016 | if (mddev->curr_resync == MD_RESYNC_YIELDED || |
5017 | mddev->curr_resync == MD_RESYNC_DELAYED) | |
72f36d59 N |
5018 | return sprintf(page, "delayed\n"); |
5019 | ||
c804cdec N |
5020 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
5021 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
58c0fed4 | 5022 | max_sectors = mddev->resync_max_sectors; |
88202a0c | 5023 | else |
58c0fed4 | 5024 | max_sectors = mddev->dev_sectors; |
88202a0c | 5025 | |
acb180b0 | 5026 | resync = mddev->curr_resync_completed; |
13ae864b | 5027 | return sprintf(page, "%llu / %llu\n", resync, max_sectors); |
88202a0c N |
5028 | } |
5029 | ||
750f199e N |
5030 | static struct md_sysfs_entry md_sync_completed = |
5031 | __ATTR_PREALLOC(sync_completed, S_IRUGO, sync_completed_show, NULL); | |
88202a0c | 5032 | |
5e96ee65 | 5033 | static ssize_t |
fd01b88c | 5034 | min_sync_show(struct mddev *mddev, char *page) |
5e96ee65 NB |
5035 | { |
5036 | return sprintf(page, "%llu\n", | |
5037 | (unsigned long long)mddev->resync_min); | |
5038 | } | |
5039 | static ssize_t | |
fd01b88c | 5040 | min_sync_store(struct mddev *mddev, const char *buf, size_t len) |
5e96ee65 NB |
5041 | { |
5042 | unsigned long long min; | |
23da422b | 5043 | int err; |
23da422b | 5044 | |
b29bebd6 | 5045 | if (kstrtoull(buf, 10, &min)) |
5e96ee65 | 5046 | return -EINVAL; |
23da422b N |
5047 | |
5048 | spin_lock(&mddev->lock); | |
5049 | err = -EINVAL; | |
5e96ee65 | 5050 | if (min > mddev->resync_max) |
23da422b N |
5051 | goto out_unlock; |
5052 | ||
5053 | err = -EBUSY; | |
5e96ee65 | 5054 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 5055 | goto out_unlock; |
5e96ee65 | 5056 | |
50c37b13 N |
5057 | /* Round down to multiple of 4K for safety */ |
5058 | mddev->resync_min = round_down(min, 8); | |
23da422b | 5059 | err = 0; |
5e96ee65 | 5060 | |
23da422b N |
5061 | out_unlock: |
5062 | spin_unlock(&mddev->lock); | |
5063 | return err ?: len; | |
5e96ee65 NB |
5064 | } |
5065 | ||
5066 | static struct md_sysfs_entry md_min_sync = | |
5067 | __ATTR(sync_min, S_IRUGO|S_IWUSR, min_sync_show, min_sync_store); | |
5068 | ||
c6207277 | 5069 | static ssize_t |
fd01b88c | 5070 | max_sync_show(struct mddev *mddev, char *page) |
c6207277 N |
5071 | { |
5072 | if (mddev->resync_max == MaxSector) | |
5073 | return sprintf(page, "max\n"); | |
5074 | else | |
5075 | return sprintf(page, "%llu\n", | |
5076 | (unsigned long long)mddev->resync_max); | |
5077 | } | |
5078 | static ssize_t | |
fd01b88c | 5079 | max_sync_store(struct mddev *mddev, const char *buf, size_t len) |
c6207277 | 5080 | { |
23da422b N |
5081 | int err; |
5082 | spin_lock(&mddev->lock); | |
c6207277 N |
5083 | if (strncmp(buf, "max", 3) == 0) |
5084 | mddev->resync_max = MaxSector; | |
5085 | else { | |
5e96ee65 | 5086 | unsigned long long max; |
23da422b N |
5087 | int chunk; |
5088 | ||
5089 | err = -EINVAL; | |
b29bebd6 | 5090 | if (kstrtoull(buf, 10, &max)) |
23da422b | 5091 | goto out_unlock; |
5e96ee65 | 5092 | if (max < mddev->resync_min) |
23da422b N |
5093 | goto out_unlock; |
5094 | ||
5095 | err = -EBUSY; | |
f97a5528 | 5096 | if (max < mddev->resync_max && md_is_rdwr(mddev) && |
c6207277 | 5097 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 5098 | goto out_unlock; |
c6207277 N |
5099 | |
5100 | /* Must be a multiple of chunk_size */ | |
23da422b N |
5101 | chunk = mddev->chunk_sectors; |
5102 | if (chunk) { | |
2ac06c33 | 5103 | sector_t temp = max; |
23da422b N |
5104 | |
5105 | err = -EINVAL; | |
5106 | if (sector_div(temp, chunk)) | |
5107 | goto out_unlock; | |
c6207277 N |
5108 | } |
5109 | mddev->resync_max = max; | |
5110 | } | |
5111 | wake_up(&mddev->recovery_wait); | |
23da422b N |
5112 | err = 0; |
5113 | out_unlock: | |
5114 | spin_unlock(&mddev->lock); | |
5115 | return err ?: len; | |
c6207277 N |
5116 | } |
5117 | ||
5118 | static struct md_sysfs_entry md_max_sync = | |
5119 | __ATTR(sync_max, S_IRUGO|S_IWUSR, max_sync_show, max_sync_store); | |
5120 | ||
e464eafd | 5121 | static ssize_t |
fd01b88c | 5122 | suspend_lo_show(struct mddev *mddev, char *page) |
e464eafd N |
5123 | { |
5124 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_lo); | |
5125 | } | |
5126 | ||
5127 | static ssize_t | |
fd01b88c | 5128 | suspend_lo_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5129 | { |
b03e0ccb | 5130 | unsigned long long new; |
6791875e | 5131 | int err; |
e464eafd | 5132 | |
4c9309c0 AD |
5133 | err = kstrtoull(buf, 10, &new); |
5134 | if (err < 0) | |
5135 | return err; | |
5136 | if (new != (sector_t)new) | |
e464eafd | 5137 | return -EINVAL; |
23ddff37 | 5138 | |
6791875e N |
5139 | err = mddev_lock(mddev); |
5140 | if (err) | |
5141 | return err; | |
5142 | err = -EINVAL; | |
5143 | if (mddev->pers == NULL || | |
5144 | mddev->pers->quiesce == NULL) | |
5145 | goto unlock; | |
b03e0ccb | 5146 | mddev_suspend(mddev); |
23ddff37 | 5147 | mddev->suspend_lo = new; |
b03e0ccb N |
5148 | mddev_resume(mddev); |
5149 | ||
6791875e N |
5150 | err = 0; |
5151 | unlock: | |
5152 | mddev_unlock(mddev); | |
5153 | return err ?: len; | |
e464eafd N |
5154 | } |
5155 | static struct md_sysfs_entry md_suspend_lo = | |
5156 | __ATTR(suspend_lo, S_IRUGO|S_IWUSR, suspend_lo_show, suspend_lo_store); | |
5157 | ||
e464eafd | 5158 | static ssize_t |
fd01b88c | 5159 | suspend_hi_show(struct mddev *mddev, char *page) |
e464eafd N |
5160 | { |
5161 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_hi); | |
5162 | } | |
5163 | ||
5164 | static ssize_t | |
fd01b88c | 5165 | suspend_hi_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5166 | { |
b03e0ccb | 5167 | unsigned long long new; |
6791875e | 5168 | int err; |
e464eafd | 5169 | |
4c9309c0 AD |
5170 | err = kstrtoull(buf, 10, &new); |
5171 | if (err < 0) | |
5172 | return err; | |
5173 | if (new != (sector_t)new) | |
e464eafd | 5174 | return -EINVAL; |
23ddff37 | 5175 | |
6791875e N |
5176 | err = mddev_lock(mddev); |
5177 | if (err) | |
5178 | return err; | |
5179 | err = -EINVAL; | |
b03e0ccb | 5180 | if (mddev->pers == NULL) |
6791875e | 5181 | goto unlock; |
b03e0ccb N |
5182 | |
5183 | mddev_suspend(mddev); | |
23ddff37 | 5184 | mddev->suspend_hi = new; |
b03e0ccb N |
5185 | mddev_resume(mddev); |
5186 | ||
6791875e N |
5187 | err = 0; |
5188 | unlock: | |
5189 | mddev_unlock(mddev); | |
5190 | return err ?: len; | |
e464eafd N |
5191 | } |
5192 | static struct md_sysfs_entry md_suspend_hi = | |
5193 | __ATTR(suspend_hi, S_IRUGO|S_IWUSR, suspend_hi_show, suspend_hi_store); | |
5194 | ||
08a02ecd | 5195 | static ssize_t |
fd01b88c | 5196 | reshape_position_show(struct mddev *mddev, char *page) |
08a02ecd N |
5197 | { |
5198 | if (mddev->reshape_position != MaxSector) | |
5199 | return sprintf(page, "%llu\n", | |
5200 | (unsigned long long)mddev->reshape_position); | |
5201 | strcpy(page, "none\n"); | |
5202 | return 5; | |
5203 | } | |
5204 | ||
5205 | static ssize_t | |
fd01b88c | 5206 | reshape_position_store(struct mddev *mddev, const char *buf, size_t len) |
08a02ecd | 5207 | { |
c6563a8c | 5208 | struct md_rdev *rdev; |
4c9309c0 | 5209 | unsigned long long new; |
6791875e | 5210 | int err; |
6791875e | 5211 | |
4c9309c0 AD |
5212 | err = kstrtoull(buf, 10, &new); |
5213 | if (err < 0) | |
5214 | return err; | |
5215 | if (new != (sector_t)new) | |
08a02ecd | 5216 | return -EINVAL; |
6791875e N |
5217 | err = mddev_lock(mddev); |
5218 | if (err) | |
5219 | return err; | |
5220 | err = -EBUSY; | |
5221 | if (mddev->pers) | |
5222 | goto unlock; | |
08a02ecd N |
5223 | mddev->reshape_position = new; |
5224 | mddev->delta_disks = 0; | |
2c810cdd | 5225 | mddev->reshape_backwards = 0; |
08a02ecd N |
5226 | mddev->new_level = mddev->level; |
5227 | mddev->new_layout = mddev->layout; | |
664e7c41 | 5228 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
c6563a8c N |
5229 | rdev_for_each(rdev, mddev) |
5230 | rdev->new_data_offset = rdev->data_offset; | |
6791875e N |
5231 | err = 0; |
5232 | unlock: | |
5233 | mddev_unlock(mddev); | |
5234 | return err ?: len; | |
08a02ecd N |
5235 | } |
5236 | ||
5237 | static struct md_sysfs_entry md_reshape_position = | |
5238 | __ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show, | |
5239 | reshape_position_store); | |
5240 | ||
2c810cdd N |
5241 | static ssize_t |
5242 | reshape_direction_show(struct mddev *mddev, char *page) | |
5243 | { | |
5244 | return sprintf(page, "%s\n", | |
5245 | mddev->reshape_backwards ? "backwards" : "forwards"); | |
5246 | } | |
5247 | ||
5248 | static ssize_t | |
5249 | reshape_direction_store(struct mddev *mddev, const char *buf, size_t len) | |
5250 | { | |
5251 | int backwards = 0; | |
6791875e N |
5252 | int err; |
5253 | ||
2c810cdd N |
5254 | if (cmd_match(buf, "forwards")) |
5255 | backwards = 0; | |
5256 | else if (cmd_match(buf, "backwards")) | |
5257 | backwards = 1; | |
5258 | else | |
5259 | return -EINVAL; | |
5260 | if (mddev->reshape_backwards == backwards) | |
5261 | return len; | |
5262 | ||
6791875e N |
5263 | err = mddev_lock(mddev); |
5264 | if (err) | |
5265 | return err; | |
2c810cdd N |
5266 | /* check if we are allowed to change */ |
5267 | if (mddev->delta_disks) | |
6791875e N |
5268 | err = -EBUSY; |
5269 | else if (mddev->persistent && | |
2c810cdd | 5270 | mddev->major_version == 0) |
6791875e N |
5271 | err = -EINVAL; |
5272 | else | |
5273 | mddev->reshape_backwards = backwards; | |
5274 | mddev_unlock(mddev); | |
5275 | return err ?: len; | |
2c810cdd N |
5276 | } |
5277 | ||
5278 | static struct md_sysfs_entry md_reshape_direction = | |
5279 | __ATTR(reshape_direction, S_IRUGO|S_IWUSR, reshape_direction_show, | |
5280 | reshape_direction_store); | |
5281 | ||
b522adcd | 5282 | static ssize_t |
fd01b88c | 5283 | array_size_show(struct mddev *mddev, char *page) |
b522adcd DW |
5284 | { |
5285 | if (mddev->external_size) | |
5286 | return sprintf(page, "%llu\n", | |
5287 | (unsigned long long)mddev->array_sectors/2); | |
5288 | else | |
5289 | return sprintf(page, "default\n"); | |
5290 | } | |
5291 | ||
5292 | static ssize_t | |
fd01b88c | 5293 | array_size_store(struct mddev *mddev, const char *buf, size_t len) |
b522adcd DW |
5294 | { |
5295 | sector_t sectors; | |
6791875e N |
5296 | int err; |
5297 | ||
5298 | err = mddev_lock(mddev); | |
5299 | if (err) | |
5300 | return err; | |
b522adcd | 5301 | |
ab5a98b1 | 5302 | /* cluster raid doesn't support change array_sectors */ |
b670883b ZL |
5303 | if (mddev_is_clustered(mddev)) { |
5304 | mddev_unlock(mddev); | |
ab5a98b1 | 5305 | return -EINVAL; |
b670883b | 5306 | } |
ab5a98b1 | 5307 | |
b522adcd DW |
5308 | if (strncmp(buf, "default", 7) == 0) { |
5309 | if (mddev->pers) | |
5310 | sectors = mddev->pers->size(mddev, 0, 0); | |
5311 | else | |
5312 | sectors = mddev->array_sectors; | |
5313 | ||
5314 | mddev->external_size = 0; | |
5315 | } else { | |
5316 | if (strict_blocks_to_sectors(buf, §ors) < 0) | |
6791875e N |
5317 | err = -EINVAL; |
5318 | else if (mddev->pers && mddev->pers->size(mddev, 0, 0) < sectors) | |
5319 | err = -E2BIG; | |
5320 | else | |
5321 | mddev->external_size = 1; | |
b522adcd DW |
5322 | } |
5323 | ||
6791875e N |
5324 | if (!err) { |
5325 | mddev->array_sectors = sectors; | |
2c247c51 CH |
5326 | if (mddev->pers) |
5327 | set_capacity_and_notify(mddev->gendisk, | |
5328 | mddev->array_sectors); | |
cbe6ef1d | 5329 | } |
6791875e N |
5330 | mddev_unlock(mddev); |
5331 | return err ?: len; | |
b522adcd DW |
5332 | } |
5333 | ||
5334 | static struct md_sysfs_entry md_array_size = | |
5335 | __ATTR(array_size, S_IRUGO|S_IWUSR, array_size_show, | |
5336 | array_size_store); | |
e464eafd | 5337 | |
664aed04 AP |
5338 | static ssize_t |
5339 | consistency_policy_show(struct mddev *mddev, char *page) | |
5340 | { | |
5341 | int ret; | |
5342 | ||
5343 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) { | |
5344 | ret = sprintf(page, "journal\n"); | |
5345 | } else if (test_bit(MD_HAS_PPL, &mddev->flags)) { | |
5346 | ret = sprintf(page, "ppl\n"); | |
5347 | } else if (mddev->bitmap) { | |
5348 | ret = sprintf(page, "bitmap\n"); | |
5349 | } else if (mddev->pers) { | |
5350 | if (mddev->pers->sync_request) | |
5351 | ret = sprintf(page, "resync\n"); | |
5352 | else | |
5353 | ret = sprintf(page, "none\n"); | |
5354 | } else { | |
5355 | ret = sprintf(page, "unknown\n"); | |
5356 | } | |
5357 | ||
5358 | return ret; | |
5359 | } | |
5360 | ||
5361 | static ssize_t | |
5362 | consistency_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5363 | { | |
ba903a3e AP |
5364 | int err = 0; |
5365 | ||
664aed04 | 5366 | if (mddev->pers) { |
ba903a3e AP |
5367 | if (mddev->pers->change_consistency_policy) |
5368 | err = mddev->pers->change_consistency_policy(mddev, buf); | |
5369 | else | |
5370 | err = -EBUSY; | |
664aed04 AP |
5371 | } else if (mddev->external && strncmp(buf, "ppl", 3) == 0) { |
5372 | set_bit(MD_HAS_PPL, &mddev->flags); | |
664aed04 | 5373 | } else { |
ba903a3e | 5374 | err = -EINVAL; |
664aed04 | 5375 | } |
ba903a3e AP |
5376 | |
5377 | return err ? err : len; | |
664aed04 AP |
5378 | } |
5379 | ||
5380 | static struct md_sysfs_entry md_consistency_policy = | |
5381 | __ATTR(consistency_policy, S_IRUGO | S_IWUSR, consistency_policy_show, | |
5382 | consistency_policy_store); | |
5383 | ||
9a567843 GJ |
5384 | static ssize_t fail_last_dev_show(struct mddev *mddev, char *page) |
5385 | { | |
5386 | return sprintf(page, "%d\n", mddev->fail_last_dev); | |
5387 | } | |
5388 | ||
5389 | /* | |
5390 | * Setting fail_last_dev to true to allow last device to be forcibly removed | |
5391 | * from RAID1/RAID10. | |
5392 | */ | |
5393 | static ssize_t | |
5394 | fail_last_dev_store(struct mddev *mddev, const char *buf, size_t len) | |
5395 | { | |
5396 | int ret; | |
5397 | bool value; | |
5398 | ||
5399 | ret = kstrtobool(buf, &value); | |
5400 | if (ret) | |
5401 | return ret; | |
5402 | ||
5403 | if (value != mddev->fail_last_dev) | |
5404 | mddev->fail_last_dev = value; | |
5405 | ||
5406 | return len; | |
5407 | } | |
5408 | static struct md_sysfs_entry md_fail_last_dev = | |
5409 | __ATTR(fail_last_dev, S_IRUGO | S_IWUSR, fail_last_dev_show, | |
5410 | fail_last_dev_store); | |
5411 | ||
3938f5fb GJ |
5412 | static ssize_t serialize_policy_show(struct mddev *mddev, char *page) |
5413 | { | |
5414 | if (mddev->pers == NULL || (mddev->pers->level != 1)) | |
5415 | return sprintf(page, "n/a\n"); | |
5416 | else | |
5417 | return sprintf(page, "%d\n", mddev->serialize_policy); | |
5418 | } | |
5419 | ||
5420 | /* | |
5421 | * Setting serialize_policy to true to enforce write IO is not reordered | |
5422 | * for raid1. | |
5423 | */ | |
5424 | static ssize_t | |
5425 | serialize_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5426 | { | |
5427 | int err; | |
5428 | bool value; | |
5429 | ||
5430 | err = kstrtobool(buf, &value); | |
5431 | if (err) | |
5432 | return err; | |
5433 | ||
5434 | if (value == mddev->serialize_policy) | |
5435 | return len; | |
5436 | ||
5437 | err = mddev_lock(mddev); | |
5438 | if (err) | |
5439 | return err; | |
5440 | if (mddev->pers == NULL || (mddev->pers->level != 1)) { | |
5441 | pr_err("md: serialize_policy is only effective for raid1\n"); | |
5442 | err = -EINVAL; | |
5443 | goto unlock; | |
5444 | } | |
5445 | ||
5446 | mddev_suspend(mddev); | |
5447 | if (value) | |
5448 | mddev_create_serial_pool(mddev, NULL, true); | |
5449 | else | |
5450 | mddev_destroy_serial_pool(mddev, NULL, true); | |
5451 | mddev->serialize_policy = value; | |
5452 | mddev_resume(mddev); | |
5453 | unlock: | |
5454 | mddev_unlock(mddev); | |
5455 | return err ?: len; | |
5456 | } | |
5457 | ||
5458 | static struct md_sysfs_entry md_serialize_policy = | |
5459 | __ATTR(serialize_policy, S_IRUGO | S_IWUSR, serialize_policy_show, | |
5460 | serialize_policy_store); | |
5461 | ||
5462 | ||
eae1701f N |
5463 | static struct attribute *md_default_attrs[] = { |
5464 | &md_level.attr, | |
d4dbd025 | 5465 | &md_layout.attr, |
eae1701f | 5466 | &md_raid_disks.attr, |
ec164d07 | 5467 | &md_uuid.attr, |
3b34380a | 5468 | &md_chunk_size.attr, |
a35b0d69 | 5469 | &md_size.attr, |
a94213b1 | 5470 | &md_resync_start.attr, |
8bb93aac | 5471 | &md_metadata.attr, |
6d7ff738 | 5472 | &md_new_device.attr, |
16f17b39 | 5473 | &md_safe_delay.attr, |
9e653b63 | 5474 | &md_array_state.attr, |
08a02ecd | 5475 | &md_reshape_position.attr, |
2c810cdd | 5476 | &md_reshape_direction.attr, |
b522adcd | 5477 | &md_array_size.attr, |
1e50915f | 5478 | &max_corr_read_errors.attr, |
664aed04 | 5479 | &md_consistency_policy.attr, |
9a567843 | 5480 | &md_fail_last_dev.attr, |
3938f5fb | 5481 | &md_serialize_policy.attr, |
411036fa N |
5482 | NULL, |
5483 | }; | |
5484 | ||
51238e7f CH |
5485 | static const struct attribute_group md_default_group = { |
5486 | .attrs = md_default_attrs, | |
5487 | }; | |
5488 | ||
411036fa | 5489 | static struct attribute *md_redundancy_attrs[] = { |
24dd469d | 5490 | &md_scan_mode.attr, |
c4a39551 | 5491 | &md_last_scan_mode.attr, |
9d88883e | 5492 | &md_mismatches.attr, |
88202a0c N |
5493 | &md_sync_min.attr, |
5494 | &md_sync_max.attr, | |
5495 | &md_sync_speed.attr, | |
90b08710 | 5496 | &md_sync_force_parallel.attr, |
88202a0c | 5497 | &md_sync_completed.attr, |
5e96ee65 | 5498 | &md_min_sync.attr, |
c6207277 | 5499 | &md_max_sync.attr, |
e464eafd N |
5500 | &md_suspend_lo.attr, |
5501 | &md_suspend_hi.attr, | |
9b1d1dac | 5502 | &md_bitmap.attr, |
d7f3d291 | 5503 | &md_degraded.attr, |
eae1701f N |
5504 | NULL, |
5505 | }; | |
c32dc040 | 5506 | static const struct attribute_group md_redundancy_group = { |
411036fa N |
5507 | .name = NULL, |
5508 | .attrs = md_redundancy_attrs, | |
5509 | }; | |
5510 | ||
51238e7f CH |
5511 | static const struct attribute_group *md_attr_groups[] = { |
5512 | &md_default_group, | |
5513 | &md_bitmap_group, | |
5514 | NULL, | |
5515 | }; | |
5516 | ||
eae1701f N |
5517 | static ssize_t |
5518 | md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
5519 | { | |
5520 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5521 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5522 | ssize_t rv; |
eae1701f N |
5523 | |
5524 | if (!entry->show) | |
5525 | return -EIO; | |
af8a2434 | 5526 | spin_lock(&all_mddevs_lock); |
12a6caf2 | 5527 | if (!mddev_get(mddev)) { |
af8a2434 N |
5528 | spin_unlock(&all_mddevs_lock); |
5529 | return -EBUSY; | |
5530 | } | |
af8a2434 N |
5531 | spin_unlock(&all_mddevs_lock); |
5532 | ||
b7b17c9b | 5533 | rv = entry->show(mddev, page); |
af8a2434 | 5534 | mddev_put(mddev); |
96de1e66 | 5535 | return rv; |
eae1701f N |
5536 | } |
5537 | ||
5538 | static ssize_t | |
5539 | md_attr_store(struct kobject *kobj, struct attribute *attr, | |
5540 | const char *page, size_t length) | |
5541 | { | |
5542 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5543 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5544 | ssize_t rv; |
eae1701f N |
5545 | |
5546 | if (!entry->store) | |
5547 | return -EIO; | |
67463acb N |
5548 | if (!capable(CAP_SYS_ADMIN)) |
5549 | return -EACCES; | |
af8a2434 | 5550 | spin_lock(&all_mddevs_lock); |
12a6caf2 | 5551 | if (!mddev_get(mddev)) { |
af8a2434 N |
5552 | spin_unlock(&all_mddevs_lock); |
5553 | return -EBUSY; | |
5554 | } | |
af8a2434 | 5555 | spin_unlock(&all_mddevs_lock); |
6791875e | 5556 | rv = entry->store(mddev, page, length); |
af8a2434 | 5557 | mddev_put(mddev); |
96de1e66 | 5558 | return rv; |
eae1701f N |
5559 | } |
5560 | ||
33b614e3 | 5561 | static void md_kobj_release(struct kobject *ko) |
eae1701f | 5562 | { |
fd01b88c | 5563 | struct mddev *mddev = container_of(ko, struct mddev, kobj); |
a21d1504 N |
5564 | |
5565 | if (mddev->sysfs_state) | |
5566 | sysfs_put(mddev->sysfs_state); | |
e1a86dbb JB |
5567 | if (mddev->sysfs_level) |
5568 | sysfs_put(mddev->sysfs_level); | |
5569 | ||
ca39f750 CH |
5570 | del_gendisk(mddev->gendisk); |
5571 | put_disk(mddev->gendisk); | |
eae1701f N |
5572 | } |
5573 | ||
52cf25d0 | 5574 | static const struct sysfs_ops md_sysfs_ops = { |
eae1701f N |
5575 | .show = md_attr_show, |
5576 | .store = md_attr_store, | |
5577 | }; | |
4d72a9de | 5578 | static const struct kobj_type md_ktype = { |
33b614e3 | 5579 | .release = md_kobj_release, |
eae1701f | 5580 | .sysfs_ops = &md_sysfs_ops, |
51238e7f | 5581 | .default_groups = md_attr_groups, |
eae1701f N |
5582 | }; |
5583 | ||
1da177e4 LT |
5584 | int mdp_major = 0; |
5585 | ||
5fd3a17e DW |
5586 | static void mddev_delayed_delete(struct work_struct *ws) |
5587 | { | |
fd01b88c | 5588 | struct mddev *mddev = container_of(ws, struct mddev, del_work); |
5fd3a17e | 5589 | |
5fd3a17e DW |
5590 | kobject_put(&mddev->kobj); |
5591 | } | |
5592 | ||
4ad23a97 N |
5593 | static void no_op(struct percpu_ref *r) {} |
5594 | ||
a415c0f1 N |
5595 | int mddev_init_writes_pending(struct mddev *mddev) |
5596 | { | |
5597 | if (mddev->writes_pending.percpu_count_ptr) | |
5598 | return 0; | |
ddde2af7 RG |
5599 | if (percpu_ref_init(&mddev->writes_pending, no_op, |
5600 | PERCPU_REF_ALLOW_REINIT, GFP_KERNEL) < 0) | |
a415c0f1 N |
5601 | return -ENOMEM; |
5602 | /* We want to start with the refcount at zero */ | |
5603 | percpu_ref_put(&mddev->writes_pending); | |
5604 | return 0; | |
5605 | } | |
5606 | EXPORT_SYMBOL_GPL(mddev_init_writes_pending); | |
5607 | ||
34cb92c0 | 5608 | struct mddev *md_alloc(dev_t dev, char *name) |
1da177e4 | 5609 | { |
039b7225 N |
5610 | /* |
5611 | * If dev is zero, name is the name of a device to allocate with | |
5612 | * an arbitrary minor number. It will be "md_???" | |
5613 | * If dev is non-zero it must be a device number with a MAJOR of | |
5614 | * MD_MAJOR or mdp_major. In this case, if "name" is NULL, then | |
5615 | * the device is being created by opening a node in /dev. | |
5616 | * If "name" is not NULL, the device is being created by | |
5617 | * writing to /sys/module/md_mod/parameters/new_array. | |
5618 | */ | |
48c9c27b | 5619 | static DEFINE_MUTEX(disks_mutex); |
0d809b38 | 5620 | struct mddev *mddev; |
1da177e4 | 5621 | struct gendisk *disk; |
efeb53c0 N |
5622 | int partitioned; |
5623 | int shift; | |
5624 | int unit; | |
0d809b38 | 5625 | int error ; |
efeb53c0 | 5626 | |
0d809b38 CH |
5627 | /* |
5628 | * Wait for any previous instance of this device to be completely | |
5629 | * removed (mddev_delayed_delete). | |
d3374825 | 5630 | */ |
e804ac78 | 5631 | flush_workqueue(md_misc_wq); |
d3374825 | 5632 | |
48c9c27b | 5633 | mutex_lock(&disks_mutex); |
0d809b38 CH |
5634 | mddev = mddev_alloc(dev); |
5635 | if (IS_ERR(mddev)) { | |
c57094a6 CH |
5636 | error = PTR_ERR(mddev); |
5637 | goto out_unlock; | |
0d809b38 CH |
5638 | } |
5639 | ||
5640 | partitioned = (MAJOR(mddev->unit) != MD_MAJOR); | |
5641 | shift = partitioned ? MdpMinorShift : 0; | |
5642 | unit = MINOR(mddev->unit) >> shift; | |
efeb53c0 | 5643 | |
039b7225 | 5644 | if (name && !dev) { |
efeb53c0 N |
5645 | /* Need to ensure that 'name' is not a duplicate. |
5646 | */ | |
fd01b88c | 5647 | struct mddev *mddev2; |
efeb53c0 N |
5648 | spin_lock(&all_mddevs_lock); |
5649 | ||
5650 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) | |
5651 | if (mddev2->gendisk && | |
5652 | strcmp(mddev2->gendisk->disk_name, name) == 0) { | |
5653 | spin_unlock(&all_mddevs_lock); | |
0d809b38 | 5654 | error = -EEXIST; |
c57094a6 | 5655 | goto out_free_mddev; |
efeb53c0 N |
5656 | } |
5657 | spin_unlock(&all_mddevs_lock); | |
1da177e4 | 5658 | } |
039b7225 N |
5659 | if (name && dev) |
5660 | /* | |
5661 | * Creating /dev/mdNNN via "newarray", so adjust hold_active. | |
5662 | */ | |
5663 | mddev->hold_active = UNTIL_STOP; | |
8b765398 | 5664 | |
0909dc44 | 5665 | error = -ENOMEM; |
0f1d2e06 CH |
5666 | disk = blk_alloc_disk(NUMA_NO_NODE); |
5667 | if (!disk) | |
c57094a6 | 5668 | goto out_free_mddev; |
409c57f3 | 5669 | |
efeb53c0 | 5670 | disk->major = MAJOR(mddev->unit); |
1da177e4 | 5671 | disk->first_minor = unit << shift; |
0f1d2e06 | 5672 | disk->minors = 1 << shift; |
efeb53c0 N |
5673 | if (name) |
5674 | strcpy(disk->disk_name, name); | |
5675 | else if (partitioned) | |
1da177e4 | 5676 | sprintf(disk->disk_name, "md_d%d", unit); |
ce7b0f46 | 5677 | else |
1da177e4 | 5678 | sprintf(disk->disk_name, "md%d", unit); |
1da177e4 LT |
5679 | disk->fops = &md_fops; |
5680 | disk->private_data = mddev; | |
0f1d2e06 CH |
5681 | |
5682 | mddev->queue = disk->queue; | |
5683 | blk_set_stacking_limits(&mddev->queue->limits); | |
56883a7e | 5684 | blk_queue_write_cache(mddev->queue, true, true); |
a564e23f | 5685 | disk->events |= DISK_EVENT_MEDIA_CHANGE; |
1da177e4 | 5686 | mddev->gendisk = disk; |
9be68dd7 | 5687 | error = add_disk(disk); |
7ad10691 | 5688 | if (error) |
c57094a6 | 5689 | goto out_put_disk; |
b0140891 | 5690 | |
ca39f750 | 5691 | kobject_init(&mddev->kobj, &md_ktype); |
28dec870 | 5692 | error = kobject_add(&mddev->kobj, &disk_to_dev(disk)->kobj, "%s", "md"); |
c57094a6 CH |
5693 | if (error) { |
5694 | /* | |
5695 | * The disk is already live at this point. Clear the hold flag | |
5696 | * and let mddev_put take care of the deletion, as it isn't any | |
5697 | * different from a normal close on last release now. | |
5698 | */ | |
5699 | mddev->hold_active = 0; | |
34cb92c0 CH |
5700 | mutex_unlock(&disks_mutex); |
5701 | mddev_put(mddev); | |
5702 | return ERR_PTR(error); | |
c57094a6 | 5703 | } |
7ad10691 CH |
5704 | |
5705 | kobject_uevent(&mddev->kobj, KOBJ_ADD); | |
5706 | mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state"); | |
5707 | mddev->sysfs_level = sysfs_get_dirent_safe(mddev->kobj.sd, "level"); | |
94f3cd7d | 5708 | mutex_unlock(&disks_mutex); |
34cb92c0 | 5709 | return mddev; |
c57094a6 CH |
5710 | |
5711 | out_put_disk: | |
5712 | put_disk(disk); | |
5713 | out_free_mddev: | |
5714 | mddev_free(mddev); | |
5715 | out_unlock: | |
5716 | mutex_unlock(&disks_mutex); | |
34cb92c0 CH |
5717 | return ERR_PTR(error); |
5718 | } | |
5719 | ||
5720 | static int md_alloc_and_put(dev_t dev, char *name) | |
5721 | { | |
5722 | struct mddev *mddev = md_alloc(dev, name); | |
5723 | ||
5724 | if (IS_ERR(mddev)) | |
5725 | return PTR_ERR(mddev); | |
5726 | mddev_put(mddev); | |
5727 | return 0; | |
efeb53c0 N |
5728 | } |
5729 | ||
28144f99 | 5730 | static void md_probe(dev_t dev) |
efeb53c0 | 5731 | { |
28144f99 CH |
5732 | if (MAJOR(dev) == MD_MAJOR && MINOR(dev) >= 512) |
5733 | return; | |
78b6350d | 5734 | if (create_on_open) |
34cb92c0 | 5735 | md_alloc_and_put(dev, NULL); |
1da177e4 LT |
5736 | } |
5737 | ||
e4dca7b7 | 5738 | static int add_named_array(const char *val, const struct kernel_param *kp) |
efeb53c0 | 5739 | { |
039b7225 N |
5740 | /* |
5741 | * val must be "md_*" or "mdNNN". | |
5742 | * For "md_*" we allocate an array with a large free minor number, and | |
efeb53c0 | 5743 | * set the name to val. val must not already be an active name. |
039b7225 N |
5744 | * For "mdNNN" we allocate an array with the minor number NNN |
5745 | * which must not already be in use. | |
efeb53c0 N |
5746 | */ |
5747 | int len = strlen(val); | |
5748 | char buf[DISK_NAME_LEN]; | |
039b7225 | 5749 | unsigned long devnum; |
efeb53c0 N |
5750 | |
5751 | while (len && val[len-1] == '\n') | |
5752 | len--; | |
5753 | if (len >= DISK_NAME_LEN) | |
5754 | return -E2BIG; | |
92d9aac9 | 5755 | strscpy(buf, val, len+1); |
039b7225 | 5756 | if (strncmp(buf, "md_", 3) == 0) |
34cb92c0 | 5757 | return md_alloc_and_put(0, buf); |
039b7225 N |
5758 | if (strncmp(buf, "md", 2) == 0 && |
5759 | isdigit(buf[2]) && | |
5760 | kstrtoul(buf+2, 10, &devnum) == 0 && | |
5761 | devnum <= MINORMASK) | |
34cb92c0 | 5762 | return md_alloc_and_put(MKDEV(MD_MAJOR, devnum), NULL); |
039b7225 N |
5763 | |
5764 | return -EINVAL; | |
efeb53c0 N |
5765 | } |
5766 | ||
8376d3c1 | 5767 | static void md_safemode_timeout(struct timer_list *t) |
1da177e4 | 5768 | { |
8376d3c1 | 5769 | struct mddev *mddev = from_timer(mddev, t, safemode_timer); |
1da177e4 | 5770 | |
4ad23a97 N |
5771 | mddev->safemode = 1; |
5772 | if (mddev->external) | |
5773 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
5774 | ||
1da177e4 LT |
5775 | md_wakeup_thread(mddev->thread); |
5776 | } | |
5777 | ||
6ff8d8ec | 5778 | static int start_dirty_degraded; |
72adae23 XN |
5779 | static void active_io_release(struct percpu_ref *ref) |
5780 | { | |
5781 | struct mddev *mddev = container_of(ref, struct mddev, active_io); | |
5782 | ||
5783 | wake_up(&mddev->sb_wait); | |
5784 | } | |
1da177e4 | 5785 | |
fd01b88c | 5786 | int md_run(struct mddev *mddev) |
1da177e4 | 5787 | { |
2604b703 | 5788 | int err; |
3cb03002 | 5789 | struct md_rdev *rdev; |
84fc4b56 | 5790 | struct md_personality *pers; |
f51d46d0 | 5791 | bool nowait = true; |
1da177e4 | 5792 | |
a757e64c N |
5793 | if (list_empty(&mddev->disks)) |
5794 | /* cannot run an array with no devices.. */ | |
1da177e4 | 5795 | return -EINVAL; |
1da177e4 LT |
5796 | |
5797 | if (mddev->pers) | |
5798 | return -EBUSY; | |
bb4f1e9d N |
5799 | /* Cannot run until previous stop completes properly */ |
5800 | if (mddev->sysfs_active) | |
5801 | return -EBUSY; | |
b6eb127d | 5802 | |
1da177e4 LT |
5803 | /* |
5804 | * Analyze all RAID superblock(s) | |
5805 | */ | |
1ec4a939 N |
5806 | if (!mddev->raid_disks) { |
5807 | if (!mddev->persistent) | |
5808 | return -EINVAL; | |
6a5cb53a YY |
5809 | err = analyze_sbs(mddev); |
5810 | if (err) | |
5811 | return -EINVAL; | |
1ec4a939 | 5812 | } |
1da177e4 | 5813 | |
d9d166c2 N |
5814 | if (mddev->level != LEVEL_NONE) |
5815 | request_module("md-level-%d", mddev->level); | |
5816 | else if (mddev->clevel[0]) | |
5817 | request_module("md-%s", mddev->clevel); | |
1da177e4 LT |
5818 | |
5819 | /* | |
5820 | * Drop all container device buffers, from now on | |
5821 | * the only valid external interface is through the md | |
5822 | * device. | |
1da177e4 | 5823 | */ |
4b6c1060 | 5824 | mddev->has_superblocks = false; |
dafb20fa | 5825 | rdev_for_each(rdev, mddev) { |
b2d444d7 | 5826 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
5827 | continue; |
5828 | sync_blockdev(rdev->bdev); | |
f98393a6 | 5829 | invalidate_bdev(rdev->bdev); |
f97a5528 YB |
5830 | if (mddev->ro != MD_RDONLY && rdev_read_only(rdev)) { |
5831 | mddev->ro = MD_RDONLY; | |
97b20ef7 N |
5832 | if (mddev->gendisk) |
5833 | set_disk_ro(mddev->gendisk, 1); | |
5834 | } | |
f0d76d70 | 5835 | |
4b6c1060 HM |
5836 | if (rdev->sb_page) |
5837 | mddev->has_superblocks = true; | |
5838 | ||
f0d76d70 N |
5839 | /* perform some consistency tests on the device. |
5840 | * We don't want the data to overlap the metadata, | |
58c0fed4 | 5841 | * Internal Bitmap issues have been handled elsewhere. |
f0d76d70 | 5842 | */ |
a6ff7e08 JB |
5843 | if (rdev->meta_bdev) { |
5844 | /* Nothing to check */; | |
5845 | } else if (rdev->data_offset < rdev->sb_start) { | |
58c0fed4 AN |
5846 | if (mddev->dev_sectors && |
5847 | rdev->data_offset + mddev->dev_sectors | |
0f420358 | 5848 | > rdev->sb_start) { |
9d48739e N |
5849 | pr_warn("md: %s: data overlaps metadata\n", |
5850 | mdname(mddev)); | |
f0d76d70 N |
5851 | return -EINVAL; |
5852 | } | |
5853 | } else { | |
0f420358 | 5854 | if (rdev->sb_start + rdev->sb_size/512 |
f0d76d70 | 5855 | > rdev->data_offset) { |
9d48739e N |
5856 | pr_warn("md: %s: metadata overlaps data\n", |
5857 | mdname(mddev)); | |
f0d76d70 N |
5858 | return -EINVAL; |
5859 | } | |
5860 | } | |
00bcb4ac | 5861 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
568ec936 | 5862 | nowait = nowait && bdev_nowait(rdev->bdev); |
1da177e4 LT |
5863 | } |
5864 | ||
72adae23 XN |
5865 | err = percpu_ref_init(&mddev->active_io, active_io_release, |
5866 | PERCPU_REF_ALLOW_REINIT, GFP_KERNEL); | |
5867 | if (err) | |
5868 | return err; | |
5869 | ||
afeee514 KO |
5870 | if (!bioset_initialized(&mddev->bio_set)) { |
5871 | err = bioset_init(&mddev->bio_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5872 | if (err) | |
72adae23 | 5873 | goto exit_active_io; |
10273170 | 5874 | } |
afeee514 KO |
5875 | if (!bioset_initialized(&mddev->sync_set)) { |
5876 | err = bioset_init(&mddev->sync_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5877 | if (err) | |
10764815 GJ |
5878 | goto exit_bio_set; |
5879 | } | |
a167f663 | 5880 | |
c687297b YK |
5881 | if (!bioset_initialized(&mddev->io_clone_set)) { |
5882 | err = bioset_init(&mddev->io_clone_set, BIO_POOL_SIZE, | |
5883 | offsetof(struct md_io_clone, bio_clone), 0); | |
c567c86b YK |
5884 | if (err) |
5885 | goto exit_sync_set; | |
5886 | } | |
5887 | ||
1da177e4 | 5888 | spin_lock(&pers_lock); |
d9d166c2 | 5889 | pers = find_pers(mddev->level, mddev->clevel); |
2604b703 | 5890 | if (!pers || !try_module_get(pers->owner)) { |
1da177e4 | 5891 | spin_unlock(&pers_lock); |
d9d166c2 | 5892 | if (mddev->level != LEVEL_NONE) |
9d48739e N |
5893 | pr_warn("md: personality for level %d is not loaded!\n", |
5894 | mddev->level); | |
d9d166c2 | 5895 | else |
9d48739e N |
5896 | pr_warn("md: personality for level %s is not loaded!\n", |
5897 | mddev->clevel); | |
bfc9dfdc SL |
5898 | err = -EINVAL; |
5899 | goto abort; | |
1da177e4 | 5900 | } |
1da177e4 | 5901 | spin_unlock(&pers_lock); |
34817e8c N |
5902 | if (mddev->level != pers->level) { |
5903 | mddev->level = pers->level; | |
5904 | mddev->new_level = pers->level; | |
5905 | } | |
92d9aac9 | 5906 | strscpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
1da177e4 | 5907 | |
f6705578 | 5908 | if (mddev->reshape_position != MaxSector && |
63c70c4f | 5909 | pers->start_reshape == NULL) { |
f6705578 | 5910 | /* This personality cannot handle reshaping... */ |
f6705578 | 5911 | module_put(pers->owner); |
bfc9dfdc SL |
5912 | err = -EINVAL; |
5913 | goto abort; | |
f6705578 N |
5914 | } |
5915 | ||
7dd5e7c3 N |
5916 | if (pers->sync_request) { |
5917 | /* Warn if this is a potentially silly | |
5918 | * configuration. | |
5919 | */ | |
3cb03002 | 5920 | struct md_rdev *rdev2; |
7dd5e7c3 | 5921 | int warned = 0; |
159ec1fc | 5922 | |
dafb20fa N |
5923 | rdev_for_each(rdev, mddev) |
5924 | rdev_for_each(rdev2, mddev) { | |
7dd5e7c3 | 5925 | if (rdev < rdev2 && |
61a27e1f CH |
5926 | rdev->bdev->bd_disk == |
5927 | rdev2->bdev->bd_disk) { | |
913cce5a | 5928 | pr_warn("%s: WARNING: %pg appears to be on the same physical disk as %pg.\n", |
9d48739e | 5929 | mdname(mddev), |
913cce5a CH |
5930 | rdev->bdev, |
5931 | rdev2->bdev); | |
7dd5e7c3 N |
5932 | warned = 1; |
5933 | } | |
5934 | } | |
159ec1fc | 5935 | |
7dd5e7c3 | 5936 | if (warned) |
9d48739e | 5937 | pr_warn("True protection against single-disk failure might be compromised.\n"); |
7dd5e7c3 N |
5938 | } |
5939 | ||
657390d2 | 5940 | mddev->recovery = 0; |
58c0fed4 AN |
5941 | /* may be over-ridden by personality */ |
5942 | mddev->resync_max_sectors = mddev->dev_sectors; | |
5943 | ||
6ff8d8ec | 5944 | mddev->ok_start_degraded = start_dirty_degraded; |
1da177e4 | 5945 | |
f97a5528 YB |
5946 | if (start_readonly && md_is_rdwr(mddev)) |
5947 | mddev->ro = MD_AUTO_READ; /* read-only, but switch on first write */ | |
f91de92e | 5948 | |
36d091f4 | 5949 | err = pers->run(mddev); |
13e53df3 | 5950 | if (err) |
9d48739e | 5951 | pr_warn("md: pers->run() failed ...\n"); |
36d091f4 | 5952 | else if (pers->size(mddev, 0, 0) < mddev->array_sectors) { |
9d48739e N |
5953 | WARN_ONCE(!mddev->external_size, |
5954 | "%s: default size too small, but 'external_size' not in effect?\n", | |
5955 | __func__); | |
5956 | pr_warn("md: invalid array_size %llu > default size %llu\n", | |
5957 | (unsigned long long)mddev->array_sectors / 2, | |
5958 | (unsigned long long)pers->size(mddev, 0, 0) / 2); | |
b522adcd | 5959 | err = -EINVAL; |
b522adcd | 5960 | } |
36d091f4 | 5961 | if (err == 0 && pers->sync_request && |
ef99bf48 | 5962 | (mddev->bitmap_info.file || mddev->bitmap_info.offset)) { |
f9209a32 GR |
5963 | struct bitmap *bitmap; |
5964 | ||
e64e4018 | 5965 | bitmap = md_bitmap_create(mddev, -1); |
f9209a32 GR |
5966 | if (IS_ERR(bitmap)) { |
5967 | err = PTR_ERR(bitmap); | |
9d48739e N |
5968 | pr_warn("%s: failed to create bitmap (%d)\n", |
5969 | mdname(mddev), err); | |
f9209a32 GR |
5970 | } else |
5971 | mddev->bitmap = bitmap; | |
5972 | ||
b15c2e57 | 5973 | } |
d494549a GJ |
5974 | if (err) |
5975 | goto bitmap_abort; | |
3e148a32 GJ |
5976 | |
5977 | if (mddev->bitmap_info.max_write_behind > 0) { | |
3e173ab5 | 5978 | bool create_pool = false; |
3e148a32 GJ |
5979 | |
5980 | rdev_for_each(rdev, mddev) { | |
5981 | if (test_bit(WriteMostly, &rdev->flags) && | |
404659cf | 5982 | rdev_init_serial(rdev)) |
3e173ab5 | 5983 | create_pool = true; |
3e148a32 | 5984 | } |
3e173ab5 | 5985 | if (create_pool && mddev->serial_info_pool == NULL) { |
404659cf GJ |
5986 | mddev->serial_info_pool = |
5987 | mempool_create_kmalloc_pool(NR_SERIAL_INFOS, | |
5988 | sizeof(struct serial_info)); | |
5989 | if (!mddev->serial_info_pool) { | |
3e148a32 | 5990 | err = -ENOMEM; |
d494549a | 5991 | goto bitmap_abort; |
3e148a32 GJ |
5992 | } |
5993 | } | |
5994 | } | |
5995 | ||
5c675f83 | 5996 | if (mddev->queue) { |
bb086a89 SL |
5997 | bool nonrot = true; |
5998 | ||
5999 | rdev_for_each(rdev, mddev) { | |
10f0d2a5 | 6000 | if (rdev->raid_disk >= 0 && !bdev_nonrot(rdev->bdev)) { |
bb086a89 SL |
6001 | nonrot = false; |
6002 | break; | |
6003 | } | |
6004 | } | |
6005 | if (mddev->degraded) | |
6006 | nonrot = false; | |
6007 | if (nonrot) | |
8b904b5b | 6008 | blk_queue_flag_set(QUEUE_FLAG_NONROT, mddev->queue); |
bb086a89 | 6009 | else |
8b904b5b | 6010 | blk_queue_flag_clear(QUEUE_FLAG_NONROT, mddev->queue); |
10764815 | 6011 | blk_queue_flag_set(QUEUE_FLAG_IO_STAT, mddev->queue); |
0f9650bd SL |
6012 | |
6013 | /* Set the NOWAIT flags if all underlying devices support it */ | |
6014 | if (nowait) | |
6015 | blk_queue_flag_set(QUEUE_FLAG_NOWAIT, mddev->queue); | |
5c675f83 | 6016 | } |
36d091f4 | 6017 | if (pers->sync_request) { |
00bcb4ac N |
6018 | if (mddev->kobj.sd && |
6019 | sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
6020 | pr_warn("md: cannot register extra attributes for %s\n", |
6021 | mdname(mddev)); | |
00bcb4ac | 6022 | mddev->sysfs_action = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_action"); |
e8efa9b8 JB |
6023 | mddev->sysfs_completed = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_completed"); |
6024 | mddev->sysfs_degraded = sysfs_get_dirent_safe(mddev->kobj.sd, "degraded"); | |
f97a5528 YB |
6025 | } else if (mddev->ro == MD_AUTO_READ) |
6026 | mddev->ro = MD_RDWR; | |
fd9d49ca | 6027 | |
1e50915f RB |
6028 | atomic_set(&mddev->max_corr_read_errors, |
6029 | MD_DEFAULT_MAX_CORRECTED_READ_ERRORS); | |
1da177e4 | 6030 | mddev->safemode = 0; |
28c1b9fd GR |
6031 | if (mddev_is_clustered(mddev)) |
6032 | mddev->safemode_delay = 0; | |
6033 | else | |
7c9d5c54 | 6034 | mddev->safemode_delay = DEFAULT_SAFEMODE_DELAY; |
1da177e4 | 6035 | mddev->in_sync = 1; |
0ca69886 | 6036 | smp_wmb(); |
36d091f4 N |
6037 | spin_lock(&mddev->lock); |
6038 | mddev->pers = pers; | |
36d091f4 | 6039 | spin_unlock(&mddev->lock); |
dafb20fa | 6040 | rdev_for_each(rdev, mddev) |
36fad858 | 6041 | if (rdev->raid_disk >= 0) |
e5b521ee | 6042 | sysfs_link_rdev(mddev, rdev); /* failure here is OK */ |
f72ffdd6 | 6043 | |
f97a5528 | 6044 | if (mddev->degraded && md_is_rdwr(mddev)) |
a4a3d26d N |
6045 | /* This ensures that recovering status is reported immediately |
6046 | * via sysfs - until a lack of spares is confirmed. | |
6047 | */ | |
6048 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
1da177e4 | 6049 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f72ffdd6 | 6050 | |
2953079c | 6051 | if (mddev->sb_flags) |
850b2b42 | 6052 | md_update_sb(mddev, 0); |
1da177e4 | 6053 | |
54679486 | 6054 | md_new_event(); |
1da177e4 | 6055 | return 0; |
b126194c | 6056 | |
d494549a GJ |
6057 | bitmap_abort: |
6058 | mddev_detach(mddev); | |
6059 | if (mddev->private) | |
6060 | pers->free(mddev, mddev->private); | |
6061 | mddev->private = NULL; | |
6062 | module_put(pers->owner); | |
6063 | md_bitmap_destroy(mddev); | |
b126194c | 6064 | abort: |
c687297b | 6065 | bioset_exit(&mddev->io_clone_set); |
c567c86b | 6066 | exit_sync_set: |
4bc034d3 | 6067 | bioset_exit(&mddev->sync_set); |
10764815 GJ |
6068 | exit_bio_set: |
6069 | bioset_exit(&mddev->bio_set); | |
72adae23 XN |
6070 | exit_active_io: |
6071 | percpu_ref_exit(&mddev->active_io); | |
b126194c | 6072 | return err; |
1da177e4 | 6073 | } |
390ee602 | 6074 | EXPORT_SYMBOL_GPL(md_run); |
1da177e4 | 6075 | |
7e0adbfc | 6076 | int do_md_run(struct mddev *mddev) |
fe60b014 N |
6077 | { |
6078 | int err; | |
6079 | ||
9d4b45d6 | 6080 | set_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
6081 | err = md_run(mddev); |
6082 | if (err) | |
6083 | goto out; | |
e64e4018 | 6084 | err = md_bitmap_load(mddev); |
69e51b44 | 6085 | if (err) { |
e64e4018 | 6086 | md_bitmap_destroy(mddev); |
69e51b44 N |
6087 | goto out; |
6088 | } | |
0fd018af | 6089 | |
28c1b9fd GR |
6090 | if (mddev_is_clustered(mddev)) |
6091 | md_allow_write(mddev); | |
6092 | ||
d5d885fd SL |
6093 | /* run start up tasks that require md_thread */ |
6094 | md_start(mddev); | |
6095 | ||
0fd018af JB |
6096 | md_wakeup_thread(mddev->thread); |
6097 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
6098 | ||
2c247c51 | 6099 | set_capacity_and_notify(mddev->gendisk, mddev->array_sectors); |
9d4b45d6 | 6100 | clear_bit(MD_NOT_READY, &mddev->flags); |
f0b4f7e2 | 6101 | mddev->changed = 1; |
fe60b014 | 6102 | kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); |
9d4b45d6 N |
6103 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6104 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
e1a86dbb | 6105 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
fe60b014 | 6106 | out: |
9d4b45d6 | 6107 | clear_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
6108 | return err; |
6109 | } | |
6110 | ||
d5d885fd SL |
6111 | int md_start(struct mddev *mddev) |
6112 | { | |
6113 | int ret = 0; | |
6114 | ||
6115 | if (mddev->pers->start) { | |
6116 | set_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
6117 | md_wakeup_thread(mddev->thread); | |
6118 | ret = mddev->pers->start(mddev); | |
6119 | clear_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
6120 | md_wakeup_thread(mddev->sync_thread); | |
6121 | } | |
6122 | return ret; | |
6123 | } | |
6124 | EXPORT_SYMBOL_GPL(md_start); | |
6125 | ||
fd01b88c | 6126 | static int restart_array(struct mddev *mddev) |
1da177e4 LT |
6127 | { |
6128 | struct gendisk *disk = mddev->gendisk; | |
97b20ef7 N |
6129 | struct md_rdev *rdev; |
6130 | bool has_journal = false; | |
6131 | bool has_readonly = false; | |
1da177e4 | 6132 | |
80fab1d7 | 6133 | /* Complain if it has no devices */ |
1da177e4 | 6134 | if (list_empty(&mddev->disks)) |
80fab1d7 AN |
6135 | return -ENXIO; |
6136 | if (!mddev->pers) | |
6137 | return -EINVAL; | |
f97a5528 | 6138 | if (md_is_rdwr(mddev)) |
80fab1d7 | 6139 | return -EBUSY; |
339421de | 6140 | |
97b20ef7 N |
6141 | rcu_read_lock(); |
6142 | rdev_for_each_rcu(rdev, mddev) { | |
6143 | if (test_bit(Journal, &rdev->flags) && | |
6144 | !test_bit(Faulty, &rdev->flags)) | |
6145 | has_journal = true; | |
a42e0d70 | 6146 | if (rdev_read_only(rdev)) |
97b20ef7 N |
6147 | has_readonly = true; |
6148 | } | |
6149 | rcu_read_unlock(); | |
6150 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags) && !has_journal) | |
339421de | 6151 | /* Don't restart rw with journal missing/faulty */ |
339421de | 6152 | return -EINVAL; |
97b20ef7 N |
6153 | if (has_readonly) |
6154 | return -EROFS; | |
339421de | 6155 | |
80fab1d7 | 6156 | mddev->safemode = 0; |
f97a5528 | 6157 | mddev->ro = MD_RDWR; |
80fab1d7 | 6158 | set_disk_ro(disk, 0); |
9d48739e | 6159 | pr_debug("md: %s switched to read-write mode.\n", mdname(mddev)); |
80fab1d7 AN |
6160 | /* Kick recovery or resync if necessary */ |
6161 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6162 | md_wakeup_thread(mddev->thread); | |
6163 | md_wakeup_thread(mddev->sync_thread); | |
00bcb4ac | 6164 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
80fab1d7 | 6165 | return 0; |
1da177e4 LT |
6166 | } |
6167 | ||
fd01b88c | 6168 | static void md_clean(struct mddev *mddev) |
6177b472 N |
6169 | { |
6170 | mddev->array_sectors = 0; | |
6171 | mddev->external_size = 0; | |
6172 | mddev->dev_sectors = 0; | |
6173 | mddev->raid_disks = 0; | |
6174 | mddev->recovery_cp = 0; | |
6175 | mddev->resync_min = 0; | |
6176 | mddev->resync_max = MaxSector; | |
6177 | mddev->reshape_position = MaxSector; | |
a1d76719 | 6178 | /* we still need mddev->external in export_rdev, do not clear it yet */ |
6177b472 N |
6179 | mddev->persistent = 0; |
6180 | mddev->level = LEVEL_NONE; | |
6181 | mddev->clevel[0] = 0; | |
6182 | mddev->flags = 0; | |
2953079c | 6183 | mddev->sb_flags = 0; |
f97a5528 | 6184 | mddev->ro = MD_RDWR; |
6177b472 N |
6185 | mddev->metadata_type[0] = 0; |
6186 | mddev->chunk_sectors = 0; | |
6187 | mddev->ctime = mddev->utime = 0; | |
6188 | mddev->layout = 0; | |
6189 | mddev->max_disks = 0; | |
6190 | mddev->events = 0; | |
a8707c08 | 6191 | mddev->can_decrease_events = 0; |
6177b472 | 6192 | mddev->delta_disks = 0; |
2c810cdd | 6193 | mddev->reshape_backwards = 0; |
6177b472 N |
6194 | mddev->new_level = LEVEL_NONE; |
6195 | mddev->new_layout = 0; | |
6196 | mddev->new_chunk_sectors = 0; | |
ed821cf8 | 6197 | mddev->curr_resync = MD_RESYNC_NONE; |
7f7583d4 | 6198 | atomic64_set(&mddev->resync_mismatches, 0); |
6177b472 N |
6199 | mddev->suspend_lo = mddev->suspend_hi = 0; |
6200 | mddev->sync_speed_min = mddev->sync_speed_max = 0; | |
6201 | mddev->recovery = 0; | |
6202 | mddev->in_sync = 0; | |
f0b4f7e2 | 6203 | mddev->changed = 0; |
6177b472 | 6204 | mddev->degraded = 0; |
6177b472 | 6205 | mddev->safemode = 0; |
bd691922 | 6206 | mddev->private = NULL; |
c20c33f0 | 6207 | mddev->cluster_info = NULL; |
6177b472 N |
6208 | mddev->bitmap_info.offset = 0; |
6209 | mddev->bitmap_info.default_offset = 0; | |
6409bb05 | 6210 | mddev->bitmap_info.default_space = 0; |
6177b472 N |
6211 | mddev->bitmap_info.chunksize = 0; |
6212 | mddev->bitmap_info.daemon_sleep = 0; | |
6213 | mddev->bitmap_info.max_write_behind = 0; | |
c20c33f0 | 6214 | mddev->bitmap_info.nodes = 0; |
6177b472 N |
6215 | } |
6216 | ||
fd01b88c | 6217 | static void __md_stop_writes(struct mddev *mddev) |
a047e125 | 6218 | { |
6b6204ee | 6219 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
21e0958e GJ |
6220 | if (work_pending(&mddev->del_work)) |
6221 | flush_workqueue(md_misc_wq); | |
a047e125 | 6222 | if (mddev->sync_thread) { |
a047e125 | 6223 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
d0a18034 | 6224 | md_reap_sync_thread(mddev); |
a047e125 N |
6225 | } |
6226 | ||
6227 | del_timer_sync(&mddev->safemode_timer); | |
6228 | ||
034e33f5 SL |
6229 | if (mddev->pers && mddev->pers->quiesce) { |
6230 | mddev->pers->quiesce(mddev, 1); | |
6231 | mddev->pers->quiesce(mddev, 0); | |
6232 | } | |
e64e4018 | 6233 | md_bitmap_flush(mddev); |
a047e125 | 6234 | |
f97a5528 | 6235 | if (md_is_rdwr(mddev) && |
28c1b9fd | 6236 | ((!mddev->in_sync && !mddev_is_clustered(mddev)) || |
2953079c | 6237 | mddev->sb_flags)) { |
a047e125 | 6238 | /* mark array as shutdown cleanly */ |
28c1b9fd GR |
6239 | if (!mddev_is_clustered(mddev)) |
6240 | mddev->in_sync = 1; | |
a047e125 N |
6241 | md_update_sb(mddev, 1); |
6242 | } | |
69b00b5b GJ |
6243 | /* disable policy to guarantee rdevs free resources for serialization */ |
6244 | mddev->serialize_policy = 0; | |
6245 | mddev_destroy_serial_pool(mddev, NULL, true); | |
a047e125 | 6246 | } |
defad61a | 6247 | |
fd01b88c | 6248 | void md_stop_writes(struct mddev *mddev) |
defad61a | 6249 | { |
29f097c4 | 6250 | mddev_lock_nointr(mddev); |
defad61a N |
6251 | __md_stop_writes(mddev); |
6252 | mddev_unlock(mddev); | |
6253 | } | |
390ee602 | 6254 | EXPORT_SYMBOL_GPL(md_stop_writes); |
a047e125 | 6255 | |
5aa61f42 N |
6256 | static void mddev_detach(struct mddev *mddev) |
6257 | { | |
e64e4018 | 6258 | md_bitmap_wait_behind_writes(mddev); |
d1932913 | 6259 | if (mddev->pers && mddev->pers->quiesce && !is_md_suspended(mddev)) { |
5aa61f42 N |
6260 | mddev->pers->quiesce(mddev, 1); |
6261 | mddev->pers->quiesce(mddev, 0); | |
6262 | } | |
7eb8ff02 | 6263 | md_unregister_thread(mddev, &mddev->thread); |
5aa61f42 N |
6264 | if (mddev->queue) |
6265 | blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ | |
6266 | } | |
6267 | ||
5eff3c43 | 6268 | static void __md_stop(struct mddev *mddev) |
6177b472 | 6269 | { |
36d091f4 | 6270 | struct md_personality *pers = mddev->pers; |
1d258758 | 6271 | md_bitmap_destroy(mddev); |
5aa61f42 | 6272 | mddev_detach(mddev); |
ee5d004f | 6273 | /* Ensure ->event_work is done */ |
21e0958e GJ |
6274 | if (mddev->event_work.func) |
6275 | flush_workqueue(md_misc_wq); | |
36d091f4 | 6276 | spin_lock(&mddev->lock); |
6177b472 | 6277 | mddev->pers = NULL; |
36d091f4 | 6278 | spin_unlock(&mddev->lock); |
07641b5f | 6279 | if (mddev->private) |
6280 | pers->free(mddev, mddev->private); | |
bd691922 | 6281 | mddev->private = NULL; |
36d091f4 N |
6282 | if (pers->sync_request && mddev->to_remove == NULL) |
6283 | mddev->to_remove = &md_redundancy_group; | |
6284 | module_put(pers->owner); | |
cca9cf90 | 6285 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
3e453522 | 6286 | |
3e453522 XN |
6287 | percpu_ref_exit(&mddev->active_io); |
6288 | bioset_exit(&mddev->bio_set); | |
6289 | bioset_exit(&mddev->sync_set); | |
c687297b | 6290 | bioset_exit(&mddev->io_clone_set); |
6aaa58c9 JW |
6291 | } |
6292 | ||
6293 | void md_stop(struct mddev *mddev) | |
6294 | { | |
7d5fff89 YK |
6295 | lockdep_assert_held(&mddev->reconfig_mutex); |
6296 | ||
6aaa58c9 JW |
6297 | /* stop the array and free an attached data structures. |
6298 | * This is called from dm-raid | |
6299 | */ | |
0dd84b31 | 6300 | __md_stop_writes(mddev); |
6aaa58c9 | 6301 | __md_stop(mddev); |
433279be | 6302 | percpu_ref_exit(&mddev->writes_pending); |
5eff3c43 N |
6303 | } |
6304 | ||
390ee602 | 6305 | EXPORT_SYMBOL_GPL(md_stop); |
6177b472 | 6306 | |
a05b7ea0 | 6307 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) |
a4bd82d0 N |
6308 | { |
6309 | int err = 0; | |
30b8feb7 N |
6310 | int did_freeze = 0; |
6311 | ||
6312 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6313 | did_freeze = 1; | |
6314 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6315 | md_wakeup_thread(mddev->thread); | |
6316 | } | |
f851b60d | 6317 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6318 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
e5e9b9cb YK |
6319 | |
6320 | /* | |
6321 | * Thread might be blocked waiting for metadata update which will now | |
6322 | * never happen | |
6323 | */ | |
6324 | md_wakeup_thread_directly(mddev->sync_thread); | |
f851b60d | 6325 | |
2953079c | 6326 | if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
88724bfa | 6327 | return -EBUSY; |
30b8feb7 | 6328 | mddev_unlock(mddev); |
f851b60d N |
6329 | wait_event(resync_wait, !test_bit(MD_RECOVERY_RUNNING, |
6330 | &mddev->recovery)); | |
88724bfa | 6331 | wait_event(mddev->sb_wait, |
2953079c | 6332 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
30b8feb7 N |
6333 | mddev_lock_nointr(mddev); |
6334 | ||
a4bd82d0 | 6335 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6336 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 | 6337 | mddev->sync_thread || |
af8d8e6f | 6338 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6339 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
30b8feb7 N |
6340 | if (did_freeze) { |
6341 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6342 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6343 | md_wakeup_thread(mddev->thread); |
6344 | } | |
a4bd82d0 N |
6345 | err = -EBUSY; |
6346 | goto out; | |
6347 | } | |
6348 | if (mddev->pers) { | |
defad61a | 6349 | __md_stop_writes(mddev); |
a4bd82d0 N |
6350 | |
6351 | err = -ENXIO; | |
f97a5528 | 6352 | if (mddev->ro == MD_RDONLY) |
a4bd82d0 | 6353 | goto out; |
f97a5528 | 6354 | mddev->ro = MD_RDONLY; |
a4bd82d0 N |
6355 | set_disk_ro(mddev->gendisk, 1); |
6356 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d N |
6357 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
6358 | md_wakeup_thread(mddev->thread); | |
00bcb4ac | 6359 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
30b8feb7 | 6360 | err = 0; |
a4bd82d0 N |
6361 | } |
6362 | out: | |
6363 | mutex_unlock(&mddev->open_mutex); | |
6364 | return err; | |
6365 | } | |
6366 | ||
9e653b63 N |
6367 | /* mode: |
6368 | * 0 - completely stop and dis-assemble array | |
9e653b63 N |
6369 | * 2 - stop but do not disassemble array |
6370 | */ | |
f72ffdd6 | 6371 | static int do_md_stop(struct mddev *mddev, int mode, |
a05b7ea0 | 6372 | struct block_device *bdev) |
1da177e4 | 6373 | { |
1da177e4 | 6374 | struct gendisk *disk = mddev->gendisk; |
3cb03002 | 6375 | struct md_rdev *rdev; |
30b8feb7 N |
6376 | int did_freeze = 0; |
6377 | ||
6378 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6379 | did_freeze = 1; | |
6380 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6381 | md_wakeup_thread(mddev->thread); | |
6382 | } | |
f851b60d | 6383 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6384 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
e5e9b9cb YK |
6385 | |
6386 | /* | |
6387 | * Thread might be blocked waiting for metadata update which will now | |
6388 | * never happen | |
6389 | */ | |
6390 | md_wakeup_thread_directly(mddev->sync_thread); | |
f851b60d | 6391 | |
30b8feb7 | 6392 | mddev_unlock(mddev); |
f851b60d N |
6393 | wait_event(resync_wait, (mddev->sync_thread == NULL && |
6394 | !test_bit(MD_RECOVERY_RUNNING, | |
6395 | &mddev->recovery))); | |
30b8feb7 | 6396 | mddev_lock_nointr(mddev); |
1da177e4 | 6397 | |
c8c00a69 | 6398 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6399 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 N |
6400 | mddev->sysfs_active || |
6401 | mddev->sync_thread || | |
af8d8e6f | 6402 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6403 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
6e17b027 | 6404 | mutex_unlock(&mddev->open_mutex); |
30b8feb7 N |
6405 | if (did_freeze) { |
6406 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6407 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6408 | md_wakeup_thread(mddev->thread); |
6409 | } | |
260fa034 N |
6410 | return -EBUSY; |
6411 | } | |
6e17b027 | 6412 | if (mddev->pers) { |
f97a5528 | 6413 | if (!md_is_rdwr(mddev)) |
a4bd82d0 | 6414 | set_disk_ro(disk, 0); |
409c57f3 | 6415 | |
defad61a | 6416 | __md_stop_writes(mddev); |
5eff3c43 | 6417 | __md_stop(mddev); |
6177b472 | 6418 | |
a4bd82d0 | 6419 | /* tell userspace to handle 'inactive' */ |
00bcb4ac | 6420 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0d4ca600 | 6421 | |
dafb20fa | 6422 | rdev_for_each(rdev, mddev) |
36fad858 NK |
6423 | if (rdev->raid_disk >= 0) |
6424 | sysfs_unlink_rdev(mddev, rdev); | |
c4647292 | 6425 | |
2c247c51 | 6426 | set_capacity_and_notify(disk, 0); |
6e17b027 | 6427 | mutex_unlock(&mddev->open_mutex); |
f0b4f7e2 | 6428 | mddev->changed = 1; |
0d4ca600 | 6429 | |
f97a5528 YB |
6430 | if (!md_is_rdwr(mddev)) |
6431 | mddev->ro = MD_RDWR; | |
6e17b027 N |
6432 | } else |
6433 | mutex_unlock(&mddev->open_mutex); | |
1da177e4 LT |
6434 | /* |
6435 | * Free resources if final stop | |
6436 | */ | |
9e653b63 | 6437 | if (mode == 0) { |
9d48739e | 6438 | pr_info("md: %s stopped.\n", mdname(mddev)); |
1da177e4 | 6439 | |
c3d9714e | 6440 | if (mddev->bitmap_info.file) { |
4af1a041 N |
6441 | struct file *f = mddev->bitmap_info.file; |
6442 | spin_lock(&mddev->lock); | |
c3d9714e | 6443 | mddev->bitmap_info.file = NULL; |
4af1a041 N |
6444 | spin_unlock(&mddev->lock); |
6445 | fput(f); | |
978f946b | 6446 | } |
c3d9714e | 6447 | mddev->bitmap_info.offset = 0; |
978f946b | 6448 | |
1da177e4 LT |
6449 | export_array(mddev); |
6450 | ||
6177b472 | 6451 | md_clean(mddev); |
efeb53c0 N |
6452 | if (mddev->hold_active == UNTIL_STOP) |
6453 | mddev->hold_active = 0; | |
a4bd82d0 | 6454 | } |
54679486 | 6455 | md_new_event(); |
00bcb4ac | 6456 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6e17b027 | 6457 | return 0; |
1da177e4 LT |
6458 | } |
6459 | ||
fdee8ae4 | 6460 | #ifndef MODULE |
fd01b88c | 6461 | static void autorun_array(struct mddev *mddev) |
1da177e4 | 6462 | { |
3cb03002 | 6463 | struct md_rdev *rdev; |
1da177e4 LT |
6464 | int err; |
6465 | ||
a757e64c | 6466 | if (list_empty(&mddev->disks)) |
1da177e4 | 6467 | return; |
1da177e4 | 6468 | |
9d48739e | 6469 | pr_info("md: running: "); |
1da177e4 | 6470 | |
dafb20fa | 6471 | rdev_for_each(rdev, mddev) { |
913cce5a | 6472 | pr_cont("<%pg>", rdev->bdev); |
1da177e4 | 6473 | } |
9d48739e | 6474 | pr_cont("\n"); |
1da177e4 | 6475 | |
d710e138 | 6476 | err = do_md_run(mddev); |
1da177e4 | 6477 | if (err) { |
9d48739e | 6478 | pr_warn("md: do_md_run() returned %d\n", err); |
a05b7ea0 | 6479 | do_md_stop(mddev, 0, NULL); |
1da177e4 LT |
6480 | } |
6481 | } | |
6482 | ||
6483 | /* | |
6484 | * lets try to run arrays based on all disks that have arrived | |
6485 | * until now. (those are in pending_raid_disks) | |
6486 | * | |
6487 | * the method: pick the first pending disk, collect all disks with | |
6488 | * the same UUID, remove all from the pending list and put them into | |
6489 | * the 'same_array' list. Then order this list based on superblock | |
6490 | * update time (freshest comes first), kick out 'old' disks and | |
6491 | * compare superblocks. If everything's fine then run it. | |
6492 | * | |
6493 | * If "unit" is allocated, then bump its reference count | |
6494 | */ | |
6495 | static void autorun_devices(int part) | |
6496 | { | |
3cb03002 | 6497 | struct md_rdev *rdev0, *rdev, *tmp; |
fd01b88c | 6498 | struct mddev *mddev; |
1da177e4 | 6499 | |
9d48739e | 6500 | pr_info("md: autorun ...\n"); |
1da177e4 | 6501 | while (!list_empty(&pending_raid_disks)) { |
e8703fe1 | 6502 | int unit; |
1da177e4 | 6503 | dev_t dev; |
ad01c9e3 | 6504 | LIST_HEAD(candidates); |
1da177e4 | 6505 | rdev0 = list_entry(pending_raid_disks.next, |
3cb03002 | 6506 | struct md_rdev, same_set); |
1da177e4 | 6507 | |
913cce5a | 6508 | pr_debug("md: considering %pg ...\n", rdev0->bdev); |
1da177e4 | 6509 | INIT_LIST_HEAD(&candidates); |
159ec1fc | 6510 | rdev_for_each_list(rdev, tmp, &pending_raid_disks) |
1da177e4 | 6511 | if (super_90_load(rdev, rdev0, 0) >= 0) { |
913cce5a CH |
6512 | pr_debug("md: adding %pg ...\n", |
6513 | rdev->bdev); | |
1da177e4 LT |
6514 | list_move(&rdev->same_set, &candidates); |
6515 | } | |
6516 | /* | |
6517 | * now we have a set of devices, with all of them having | |
6518 | * mostly sane superblocks. It's time to allocate the | |
6519 | * mddev. | |
6520 | */ | |
e8703fe1 N |
6521 | if (part) { |
6522 | dev = MKDEV(mdp_major, | |
6523 | rdev0->preferred_minor << MdpMinorShift); | |
6524 | unit = MINOR(dev) >> MdpMinorShift; | |
6525 | } else { | |
6526 | dev = MKDEV(MD_MAJOR, rdev0->preferred_minor); | |
6527 | unit = MINOR(dev); | |
6528 | } | |
6529 | if (rdev0->preferred_minor != unit) { | |
913cce5a CH |
6530 | pr_warn("md: unit number in %pg is bad: %d\n", |
6531 | rdev0->bdev, rdev0->preferred_minor); | |
1da177e4 LT |
6532 | break; |
6533 | } | |
1da177e4 | 6534 | |
34cb92c0 CH |
6535 | mddev = md_alloc(dev, NULL); |
6536 | if (IS_ERR(mddev)) | |
1da177e4 | 6537 | break; |
65aa97c4 | 6538 | |
f72ffdd6 | 6539 | if (mddev_lock(mddev)) |
9d48739e | 6540 | pr_warn("md: %s locked, cannot run\n", mdname(mddev)); |
1da177e4 LT |
6541 | else if (mddev->raid_disks || mddev->major_version |
6542 | || !list_empty(&mddev->disks)) { | |
913cce5a CH |
6543 | pr_warn("md: %s already running, cannot run %pg\n", |
6544 | mdname(mddev), rdev0->bdev); | |
1da177e4 LT |
6545 | mddev_unlock(mddev); |
6546 | } else { | |
9d48739e | 6547 | pr_debug("md: created %s\n", mdname(mddev)); |
1ec4a939 | 6548 | mddev->persistent = 1; |
159ec1fc | 6549 | rdev_for_each_list(rdev, tmp, &candidates) { |
1da177e4 LT |
6550 | list_del_init(&rdev->same_set); |
6551 | if (bind_rdev_to_array(rdev, mddev)) | |
2736e8ee | 6552 | export_rdev(rdev, mddev); |
1da177e4 LT |
6553 | } |
6554 | autorun_array(mddev); | |
6555 | mddev_unlock(mddev); | |
6556 | } | |
6557 | /* on success, candidates will be empty, on error | |
6558 | * it won't... | |
6559 | */ | |
159ec1fc | 6560 | rdev_for_each_list(rdev, tmp, &candidates) { |
4b80991c | 6561 | list_del_init(&rdev->same_set); |
2736e8ee | 6562 | export_rdev(rdev, mddev); |
4b80991c | 6563 | } |
1da177e4 LT |
6564 | mddev_put(mddev); |
6565 | } | |
9d48739e | 6566 | pr_info("md: ... autorun DONE.\n"); |
1da177e4 | 6567 | } |
fdee8ae4 | 6568 | #endif /* !MODULE */ |
1da177e4 | 6569 | |
f72ffdd6 | 6570 | static int get_version(void __user *arg) |
1da177e4 LT |
6571 | { |
6572 | mdu_version_t ver; | |
6573 | ||
6574 | ver.major = MD_MAJOR_VERSION; | |
6575 | ver.minor = MD_MINOR_VERSION; | |
6576 | ver.patchlevel = MD_PATCHLEVEL_VERSION; | |
6577 | ||
6578 | if (copy_to_user(arg, &ver, sizeof(ver))) | |
6579 | return -EFAULT; | |
6580 | ||
6581 | return 0; | |
6582 | } | |
6583 | ||
f72ffdd6 | 6584 | static int get_array_info(struct mddev *mddev, void __user *arg) |
1da177e4 LT |
6585 | { |
6586 | mdu_array_info_t info; | |
a9f326eb | 6587 | int nr,working,insync,failed,spare; |
3cb03002 | 6588 | struct md_rdev *rdev; |
1da177e4 | 6589 | |
1ca69c4b N |
6590 | nr = working = insync = failed = spare = 0; |
6591 | rcu_read_lock(); | |
6592 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 6593 | nr++; |
b2d444d7 | 6594 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
6595 | failed++; |
6596 | else { | |
6597 | working++; | |
b2d444d7 | 6598 | if (test_bit(In_sync, &rdev->flags)) |
f72ffdd6 | 6599 | insync++; |
b347af81 SL |
6600 | else if (test_bit(Journal, &rdev->flags)) |
6601 | /* TODO: add journal count to md_u.h */ | |
6602 | ; | |
1da177e4 LT |
6603 | else |
6604 | spare++; | |
6605 | } | |
6606 | } | |
1ca69c4b | 6607 | rcu_read_unlock(); |
1da177e4 LT |
6608 | |
6609 | info.major_version = mddev->major_version; | |
6610 | info.minor_version = mddev->minor_version; | |
6611 | info.patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6612 | info.ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 6613 | info.level = mddev->level; |
58c0fed4 AN |
6614 | info.size = mddev->dev_sectors / 2; |
6615 | if (info.size != mddev->dev_sectors / 2) /* overflow */ | |
284ae7ca | 6616 | info.size = -1; |
1da177e4 LT |
6617 | info.nr_disks = nr; |
6618 | info.raid_disks = mddev->raid_disks; | |
6619 | info.md_minor = mddev->md_minor; | |
6620 | info.not_persistent= !mddev->persistent; | |
6621 | ||
9ebc6ef1 | 6622 | info.utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
6623 | info.state = 0; |
6624 | if (mddev->in_sync) | |
6625 | info.state = (1<<MD_SB_CLEAN); | |
c3d9714e | 6626 | if (mddev->bitmap && mddev->bitmap_info.offset) |
9bd35920 | 6627 | info.state |= (1<<MD_SB_BITMAP_PRESENT); |
ca8895d9 GR |
6628 | if (mddev_is_clustered(mddev)) |
6629 | info.state |= (1<<MD_SB_CLUSTERED); | |
a9f326eb | 6630 | info.active_disks = insync; |
1da177e4 LT |
6631 | info.working_disks = working; |
6632 | info.failed_disks = failed; | |
6633 | info.spare_disks = spare; | |
6634 | ||
6635 | info.layout = mddev->layout; | |
9d8f0363 | 6636 | info.chunk_size = mddev->chunk_sectors << 9; |
1da177e4 LT |
6637 | |
6638 | if (copy_to_user(arg, &info, sizeof(info))) | |
6639 | return -EFAULT; | |
6640 | ||
6641 | return 0; | |
6642 | } | |
6643 | ||
f72ffdd6 | 6644 | static int get_bitmap_file(struct mddev *mddev, void __user * arg) |
32a7627c N |
6645 | { |
6646 | mdu_bitmap_file_t *file = NULL; /* too big for stack allocation */ | |
f4ad3d38 | 6647 | char *ptr; |
4af1a041 | 6648 | int err; |
32a7627c | 6649 | |
b6878d9e | 6650 | file = kzalloc(sizeof(*file), GFP_NOIO); |
32a7627c | 6651 | if (!file) |
4af1a041 | 6652 | return -ENOMEM; |
32a7627c | 6653 | |
4af1a041 N |
6654 | err = 0; |
6655 | spin_lock(&mddev->lock); | |
25eafe1a BR |
6656 | /* bitmap enabled */ |
6657 | if (mddev->bitmap_info.file) { | |
6658 | ptr = file_path(mddev->bitmap_info.file, file->pathname, | |
6659 | sizeof(file->pathname)); | |
6660 | if (IS_ERR(ptr)) | |
6661 | err = PTR_ERR(ptr); | |
6662 | else | |
6663 | memmove(file->pathname, ptr, | |
6664 | sizeof(file->pathname)-(ptr-file->pathname)); | |
6665 | } | |
4af1a041 | 6666 | spin_unlock(&mddev->lock); |
32a7627c | 6667 | |
4af1a041 N |
6668 | if (err == 0 && |
6669 | copy_to_user(arg, file, sizeof(*file))) | |
32a7627c | 6670 | err = -EFAULT; |
4af1a041 | 6671 | |
32a7627c N |
6672 | kfree(file); |
6673 | return err; | |
6674 | } | |
6675 | ||
f72ffdd6 | 6676 | static int get_disk_info(struct mddev *mddev, void __user * arg) |
1da177e4 LT |
6677 | { |
6678 | mdu_disk_info_t info; | |
3cb03002 | 6679 | struct md_rdev *rdev; |
1da177e4 LT |
6680 | |
6681 | if (copy_from_user(&info, arg, sizeof(info))) | |
6682 | return -EFAULT; | |
6683 | ||
1ca69c4b | 6684 | rcu_read_lock(); |
57d051dc | 6685 | rdev = md_find_rdev_nr_rcu(mddev, info.number); |
1da177e4 LT |
6686 | if (rdev) { |
6687 | info.major = MAJOR(rdev->bdev->bd_dev); | |
6688 | info.minor = MINOR(rdev->bdev->bd_dev); | |
6689 | info.raid_disk = rdev->raid_disk; | |
6690 | info.state = 0; | |
b2d444d7 | 6691 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 6692 | info.state |= (1<<MD_DISK_FAULTY); |
b2d444d7 | 6693 | else if (test_bit(In_sync, &rdev->flags)) { |
1da177e4 LT |
6694 | info.state |= (1<<MD_DISK_ACTIVE); |
6695 | info.state |= (1<<MD_DISK_SYNC); | |
6696 | } | |
9efdca16 | 6697 | if (test_bit(Journal, &rdev->flags)) |
bac624f3 | 6698 | info.state |= (1<<MD_DISK_JOURNAL); |
8ddf9efe N |
6699 | if (test_bit(WriteMostly, &rdev->flags)) |
6700 | info.state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
6701 | if (test_bit(FailFast, &rdev->flags)) |
6702 | info.state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 LT |
6703 | } else { |
6704 | info.major = info.minor = 0; | |
6705 | info.raid_disk = -1; | |
6706 | info.state = (1<<MD_DISK_REMOVED); | |
6707 | } | |
1ca69c4b | 6708 | rcu_read_unlock(); |
1da177e4 LT |
6709 | |
6710 | if (copy_to_user(arg, &info, sizeof(info))) | |
6711 | return -EFAULT; | |
6712 | ||
6713 | return 0; | |
6714 | } | |
6715 | ||
7e0adbfc | 6716 | int md_add_new_disk(struct mddev *mddev, struct mdu_disk_info_s *info) |
1da177e4 | 6717 | { |
3cb03002 | 6718 | struct md_rdev *rdev; |
1da177e4 LT |
6719 | dev_t dev = MKDEV(info->major,info->minor); |
6720 | ||
1aee41f6 GR |
6721 | if (mddev_is_clustered(mddev) && |
6722 | !(info->state & ((1 << MD_DISK_CLUSTER_ADD) | (1 << MD_DISK_CANDIDATE)))) { | |
9d48739e N |
6723 | pr_warn("%s: Cannot add to clustered mddev.\n", |
6724 | mdname(mddev)); | |
1aee41f6 GR |
6725 | return -EINVAL; |
6726 | } | |
6727 | ||
1da177e4 LT |
6728 | if (info->major != MAJOR(dev) || info->minor != MINOR(dev)) |
6729 | return -EOVERFLOW; | |
6730 | ||
6731 | if (!mddev->raid_disks) { | |
6732 | int err; | |
6733 | /* expecting a device which has a superblock */ | |
6734 | rdev = md_import_device(dev, mddev->major_version, mddev->minor_version); | |
6735 | if (IS_ERR(rdev)) { | |
9d48739e | 6736 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6737 | PTR_ERR(rdev)); |
6738 | return PTR_ERR(rdev); | |
6739 | } | |
6740 | if (!list_empty(&mddev->disks)) { | |
3cb03002 N |
6741 | struct md_rdev *rdev0 |
6742 | = list_entry(mddev->disks.next, | |
6743 | struct md_rdev, same_set); | |
a9f326eb | 6744 | err = super_types[mddev->major_version] |
1da177e4 LT |
6745 | .load_super(rdev, rdev0, mddev->minor_version); |
6746 | if (err < 0) { | |
913cce5a CH |
6747 | pr_warn("md: %pg has different UUID to %pg\n", |
6748 | rdev->bdev, | |
6749 | rdev0->bdev); | |
2736e8ee | 6750 | export_rdev(rdev, mddev); |
1da177e4 LT |
6751 | return -EINVAL; |
6752 | } | |
6753 | } | |
6754 | err = bind_rdev_to_array(rdev, mddev); | |
6755 | if (err) | |
2736e8ee | 6756 | export_rdev(rdev, mddev); |
1da177e4 LT |
6757 | return err; |
6758 | } | |
6759 | ||
6760 | /* | |
7e0adbfc | 6761 | * md_add_new_disk can be used once the array is assembled |
1da177e4 LT |
6762 | * to add "hot spares". They must already have a superblock |
6763 | * written | |
6764 | */ | |
6765 | if (mddev->pers) { | |
6766 | int err; | |
6767 | if (!mddev->pers->hot_add_disk) { | |
9d48739e N |
6768 | pr_warn("%s: personality does not support diskops!\n", |
6769 | mdname(mddev)); | |
1da177e4 LT |
6770 | return -EINVAL; |
6771 | } | |
7b1e35f6 N |
6772 | if (mddev->persistent) |
6773 | rdev = md_import_device(dev, mddev->major_version, | |
6774 | mddev->minor_version); | |
6775 | else | |
6776 | rdev = md_import_device(dev, -1, -1); | |
1da177e4 | 6777 | if (IS_ERR(rdev)) { |
9d48739e | 6778 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6779 | PTR_ERR(rdev)); |
6780 | return PTR_ERR(rdev); | |
6781 | } | |
1a855a06 | 6782 | /* set saved_raid_disk if appropriate */ |
41158c7e N |
6783 | if (!mddev->persistent) { |
6784 | if (info->state & (1<<MD_DISK_SYNC) && | |
bf572541 | 6785 | info->raid_disk < mddev->raid_disks) { |
41158c7e | 6786 | rdev->raid_disk = info->raid_disk; |
8313b8e5 | 6787 | clear_bit(Bitmap_sync, &rdev->flags); |
bf572541 | 6788 | } else |
41158c7e | 6789 | rdev->raid_disk = -1; |
f466722c | 6790 | rdev->saved_raid_disk = rdev->raid_disk; |
41158c7e N |
6791 | } else |
6792 | super_types[mddev->major_version]. | |
6793 | validate_super(mddev, rdev); | |
bedd86b7 | 6794 | if ((info->state & (1<<MD_DISK_SYNC)) && |
f4563091 | 6795 | rdev->raid_disk != info->raid_disk) { |
bedd86b7 N |
6796 | /* This was a hot-add request, but events doesn't |
6797 | * match, so reject it. | |
6798 | */ | |
2736e8ee | 6799 | export_rdev(rdev, mddev); |
bedd86b7 N |
6800 | return -EINVAL; |
6801 | } | |
6802 | ||
b2d444d7 | 6803 | clear_bit(In_sync, &rdev->flags); /* just to be sure */ |
8ddf9efe N |
6804 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6805 | set_bit(WriteMostly, &rdev->flags); | |
575a80fa N |
6806 | else |
6807 | clear_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6808 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6809 | set_bit(FailFast, &rdev->flags); | |
6810 | else | |
6811 | clear_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6812 | |
f6b6ec5c SL |
6813 | if (info->state & (1<<MD_DISK_JOURNAL)) { |
6814 | struct md_rdev *rdev2; | |
6815 | bool has_journal = false; | |
6816 | ||
6817 | /* make sure no existing journal disk */ | |
6818 | rdev_for_each(rdev2, mddev) { | |
6819 | if (test_bit(Journal, &rdev2->flags)) { | |
6820 | has_journal = true; | |
6821 | break; | |
6822 | } | |
6823 | } | |
230b55fa | 6824 | if (has_journal || mddev->bitmap) { |
2736e8ee | 6825 | export_rdev(rdev, mddev); |
f6b6ec5c SL |
6826 | return -EBUSY; |
6827 | } | |
bac624f3 | 6828 | set_bit(Journal, &rdev->flags); |
f6b6ec5c | 6829 | } |
1aee41f6 GR |
6830 | /* |
6831 | * check whether the device shows up in other nodes | |
6832 | */ | |
6833 | if (mddev_is_clustered(mddev)) { | |
dbb64f86 | 6834 | if (info->state & (1 << MD_DISK_CANDIDATE)) |
1aee41f6 | 6835 | set_bit(Candidate, &rdev->flags); |
dbb64f86 | 6836 | else if (info->state & (1 << MD_DISK_CLUSTER_ADD)) { |
1aee41f6 | 6837 | /* --add initiated by this node */ |
dbb64f86 | 6838 | err = md_cluster_ops->add_new_disk(mddev, rdev); |
1aee41f6 | 6839 | if (err) { |
2736e8ee | 6840 | export_rdev(rdev, mddev); |
1aee41f6 GR |
6841 | return err; |
6842 | } | |
6843 | } | |
6844 | } | |
6845 | ||
1da177e4 LT |
6846 | rdev->raid_disk = -1; |
6847 | err = bind_rdev_to_array(rdev, mddev); | |
dbb64f86 | 6848 | |
1da177e4 | 6849 | if (err) |
2736e8ee | 6850 | export_rdev(rdev, mddev); |
dbb64f86 GR |
6851 | |
6852 | if (mddev_is_clustered(mddev)) { | |
e566aef1 GJ |
6853 | if (info->state & (1 << MD_DISK_CANDIDATE)) { |
6854 | if (!err) { | |
6855 | err = md_cluster_ops->new_disk_ack(mddev, | |
6856 | err == 0); | |
6857 | if (err) | |
6858 | md_kick_rdev_from_array(rdev); | |
6859 | } | |
6860 | } else { | |
dbb64f86 GR |
6861 | if (err) |
6862 | md_cluster_ops->add_new_disk_cancel(mddev); | |
6863 | else | |
6864 | err = add_bound_rdev(rdev); | |
6865 | } | |
6866 | ||
6867 | } else if (!err) | |
a6da4ef8 | 6868 | err = add_bound_rdev(rdev); |
dbb64f86 | 6869 | |
1da177e4 LT |
6870 | return err; |
6871 | } | |
6872 | ||
7e0adbfc | 6873 | /* otherwise, md_add_new_disk is only allowed |
1da177e4 LT |
6874 | * for major_version==0 superblocks |
6875 | */ | |
6876 | if (mddev->major_version != 0) { | |
9d48739e | 6877 | pr_warn("%s: ADD_NEW_DISK not supported\n", mdname(mddev)); |
1da177e4 LT |
6878 | return -EINVAL; |
6879 | } | |
6880 | ||
6881 | if (!(info->state & (1<<MD_DISK_FAULTY))) { | |
6882 | int err; | |
d710e138 | 6883 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6884 | if (IS_ERR(rdev)) { |
9d48739e | 6885 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6886 | PTR_ERR(rdev)); |
6887 | return PTR_ERR(rdev); | |
6888 | } | |
6889 | rdev->desc_nr = info->number; | |
6890 | if (info->raid_disk < mddev->raid_disks) | |
6891 | rdev->raid_disk = info->raid_disk; | |
6892 | else | |
6893 | rdev->raid_disk = -1; | |
6894 | ||
1da177e4 | 6895 | if (rdev->raid_disk < mddev->raid_disks) |
b2d444d7 N |
6896 | if (info->state & (1<<MD_DISK_SYNC)) |
6897 | set_bit(In_sync, &rdev->flags); | |
1da177e4 | 6898 | |
8ddf9efe N |
6899 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6900 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6901 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6902 | set_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6903 | |
1da177e4 | 6904 | if (!mddev->persistent) { |
9d48739e | 6905 | pr_debug("md: nonpersistent superblock ...\n"); |
0fe80347 | 6906 | rdev->sb_start = bdev_nr_sectors(rdev->bdev); |
77304d2a | 6907 | } else |
57b2caa3 | 6908 | rdev->sb_start = calc_dev_sboffset(rdev); |
8190e754 | 6909 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6910 | |
2bf071bf N |
6911 | err = bind_rdev_to_array(rdev, mddev); |
6912 | if (err) { | |
2736e8ee | 6913 | export_rdev(rdev, mddev); |
2bf071bf N |
6914 | return err; |
6915 | } | |
1da177e4 LT |
6916 | } |
6917 | ||
6918 | return 0; | |
6919 | } | |
6920 | ||
f72ffdd6 | 6921 | static int hot_remove_disk(struct mddev *mddev, dev_t dev) |
1da177e4 | 6922 | { |
3cb03002 | 6923 | struct md_rdev *rdev; |
1da177e4 | 6924 | |
c42a0e26 YY |
6925 | if (!mddev->pers) |
6926 | return -ENODEV; | |
6927 | ||
1da177e4 LT |
6928 | rdev = find_rdev(mddev, dev); |
6929 | if (!rdev) | |
6930 | return -ENXIO; | |
6931 | ||
2910ff17 GR |
6932 | if (rdev->raid_disk < 0) |
6933 | goto kick_rdev; | |
293467aa | 6934 | |
3ea8929d N |
6935 | clear_bit(Blocked, &rdev->flags); |
6936 | remove_and_add_spares(mddev, rdev); | |
6937 | ||
1da177e4 LT |
6938 | if (rdev->raid_disk >= 0) |
6939 | goto busy; | |
6940 | ||
2910ff17 | 6941 | kick_rdev: |
bca5b065 ZH |
6942 | if (mddev_is_clustered(mddev)) { |
6943 | if (md_cluster_ops->remove_disk(mddev, rdev)) | |
6944 | goto busy; | |
6945 | } | |
88bcfef7 | 6946 | |
fb56dfef | 6947 | md_kick_rdev_from_array(rdev); |
2953079c | 6948 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6949 | if (mddev->thread) |
6950 | md_wakeup_thread(mddev->thread); | |
6951 | else | |
6952 | md_update_sb(mddev, 1); | |
54679486 | 6953 | md_new_event(); |
1da177e4 LT |
6954 | |
6955 | return 0; | |
6956 | busy: | |
913cce5a CH |
6957 | pr_debug("md: cannot remove active disk %pg from %s ...\n", |
6958 | rdev->bdev, mdname(mddev)); | |
1da177e4 LT |
6959 | return -EBUSY; |
6960 | } | |
6961 | ||
f72ffdd6 | 6962 | static int hot_add_disk(struct mddev *mddev, dev_t dev) |
1da177e4 | 6963 | { |
1da177e4 | 6964 | int err; |
3cb03002 | 6965 | struct md_rdev *rdev; |
1da177e4 LT |
6966 | |
6967 | if (!mddev->pers) | |
6968 | return -ENODEV; | |
6969 | ||
6970 | if (mddev->major_version != 0) { | |
9d48739e | 6971 | pr_warn("%s: HOT_ADD may only be used with version-0 superblocks.\n", |
1da177e4 LT |
6972 | mdname(mddev)); |
6973 | return -EINVAL; | |
6974 | } | |
6975 | if (!mddev->pers->hot_add_disk) { | |
9d48739e | 6976 | pr_warn("%s: personality does not support diskops!\n", |
1da177e4 LT |
6977 | mdname(mddev)); |
6978 | return -EINVAL; | |
6979 | } | |
6980 | ||
d710e138 | 6981 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6982 | if (IS_ERR(rdev)) { |
9d48739e | 6983 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6984 | PTR_ERR(rdev)); |
6985 | return -EINVAL; | |
6986 | } | |
6987 | ||
6988 | if (mddev->persistent) | |
57b2caa3 | 6989 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 6990 | else |
0fe80347 | 6991 | rdev->sb_start = bdev_nr_sectors(rdev->bdev); |
1da177e4 | 6992 | |
8190e754 | 6993 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6994 | |
b2d444d7 | 6995 | if (test_bit(Faulty, &rdev->flags)) { |
913cce5a CH |
6996 | pr_warn("md: can not hot-add faulty %pg disk to %s!\n", |
6997 | rdev->bdev, mdname(mddev)); | |
1da177e4 LT |
6998 | err = -EINVAL; |
6999 | goto abort_export; | |
7000 | } | |
293467aa | 7001 | |
b2d444d7 | 7002 | clear_bit(In_sync, &rdev->flags); |
1da177e4 | 7003 | rdev->desc_nr = -1; |
5842730d | 7004 | rdev->saved_raid_disk = -1; |
2bf071bf N |
7005 | err = bind_rdev_to_array(rdev, mddev); |
7006 | if (err) | |
2aa82191 | 7007 | goto abort_export; |
1da177e4 LT |
7008 | |
7009 | /* | |
7010 | * The rest should better be atomic, we can have disk failures | |
7011 | * noticed in interrupt contexts ... | |
7012 | */ | |
7013 | ||
1da177e4 LT |
7014 | rdev->raid_disk = -1; |
7015 | ||
2953079c | 7016 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
7017 | if (!mddev->thread) |
7018 | md_update_sb(mddev, 1); | |
f51d46d0 VV |
7019 | /* |
7020 | * If the new disk does not support REQ_NOWAIT, | |
7021 | * disable on the whole MD. | |
7022 | */ | |
568ec936 | 7023 | if (!bdev_nowait(rdev->bdev)) { |
913cce5a CH |
7024 | pr_info("%s: Disabling nowait because %pg does not support nowait\n", |
7025 | mdname(mddev), rdev->bdev); | |
f51d46d0 VV |
7026 | blk_queue_flag_clear(QUEUE_FLAG_NOWAIT, mddev->queue); |
7027 | } | |
1da177e4 LT |
7028 | /* |
7029 | * Kick recovery, maybe this spare has to be added to the | |
7030 | * array immediately. | |
7031 | */ | |
7032 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7033 | md_wakeup_thread(mddev->thread); | |
54679486 | 7034 | md_new_event(); |
1da177e4 LT |
7035 | return 0; |
7036 | ||
1da177e4 | 7037 | abort_export: |
2736e8ee | 7038 | export_rdev(rdev, mddev); |
1da177e4 LT |
7039 | return err; |
7040 | } | |
7041 | ||
fd01b88c | 7042 | static int set_bitmap_file(struct mddev *mddev, int fd) |
32a7627c | 7043 | { |
035328c2 | 7044 | int err = 0; |
32a7627c | 7045 | |
36fa3063 | 7046 | if (mddev->pers) { |
d66b1b39 | 7047 | if (!mddev->pers->quiesce || !mddev->thread) |
36fa3063 N |
7048 | return -EBUSY; |
7049 | if (mddev->recovery || mddev->sync_thread) | |
7050 | return -EBUSY; | |
7051 | /* we should be able to change the bitmap.. */ | |
7052 | } | |
32a7627c | 7053 | |
36fa3063 | 7054 | if (fd >= 0) { |
035328c2 | 7055 | struct inode *inode; |
1e594bb2 N |
7056 | struct file *f; |
7057 | ||
7058 | if (mddev->bitmap || mddev->bitmap_info.file) | |
36fa3063 | 7059 | return -EEXIST; /* cannot add when bitmap is present */ |
a34d4ef8 CH |
7060 | |
7061 | if (!IS_ENABLED(CONFIG_MD_BITMAP_FILE)) { | |
7062 | pr_warn("%s: bitmap files not supported by this kernel\n", | |
7063 | mdname(mddev)); | |
7064 | return -EINVAL; | |
7065 | } | |
0ae1c9d3 CH |
7066 | pr_warn("%s: using deprecated bitmap file support\n", |
7067 | mdname(mddev)); | |
a34d4ef8 | 7068 | |
1e594bb2 | 7069 | f = fget(fd); |
32a7627c | 7070 | |
1e594bb2 | 7071 | if (f == NULL) { |
9d48739e N |
7072 | pr_warn("%s: error: failed to get bitmap file\n", |
7073 | mdname(mddev)); | |
36fa3063 N |
7074 | return -EBADF; |
7075 | } | |
7076 | ||
1e594bb2 | 7077 | inode = f->f_mapping->host; |
035328c2 | 7078 | if (!S_ISREG(inode->i_mode)) { |
9d48739e N |
7079 | pr_warn("%s: error: bitmap file must be a regular file\n", |
7080 | mdname(mddev)); | |
035328c2 | 7081 | err = -EBADF; |
1e594bb2 | 7082 | } else if (!(f->f_mode & FMODE_WRITE)) { |
9d48739e N |
7083 | pr_warn("%s: error: bitmap file must open for write\n", |
7084 | mdname(mddev)); | |
035328c2 N |
7085 | err = -EBADF; |
7086 | } else if (atomic_read(&inode->i_writecount) != 1) { | |
9d48739e N |
7087 | pr_warn("%s: error: bitmap file is already in use\n", |
7088 | mdname(mddev)); | |
035328c2 N |
7089 | err = -EBUSY; |
7090 | } | |
7091 | if (err) { | |
1e594bb2 | 7092 | fput(f); |
36fa3063 N |
7093 | return err; |
7094 | } | |
1e594bb2 | 7095 | mddev->bitmap_info.file = f; |
c3d9714e | 7096 | mddev->bitmap_info.offset = 0; /* file overrides offset */ |
36fa3063 N |
7097 | } else if (mddev->bitmap == NULL) |
7098 | return -ENOENT; /* cannot remove what isn't there */ | |
7099 | err = 0; | |
7100 | if (mddev->pers) { | |
69e51b44 | 7101 | if (fd >= 0) { |
f9209a32 GR |
7102 | struct bitmap *bitmap; |
7103 | ||
e64e4018 | 7104 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7105 | mddev_suspend(mddev); |
f9209a32 GR |
7106 | if (!IS_ERR(bitmap)) { |
7107 | mddev->bitmap = bitmap; | |
e64e4018 | 7108 | err = md_bitmap_load(mddev); |
ba599aca N |
7109 | } else |
7110 | err = PTR_ERR(bitmap); | |
52a0d49d | 7111 | if (err) { |
e64e4018 | 7112 | md_bitmap_destroy(mddev); |
52a0d49d N |
7113 | fd = -1; |
7114 | } | |
9e1cc0a5 | 7115 | mddev_resume(mddev); |
52a0d49d | 7116 | } else if (fd < 0) { |
9e1cc0a5 | 7117 | mddev_suspend(mddev); |
e64e4018 | 7118 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7119 | mddev_resume(mddev); |
d7375ab3 | 7120 | } |
d7375ab3 N |
7121 | } |
7122 | if (fd < 0) { | |
4af1a041 N |
7123 | struct file *f = mddev->bitmap_info.file; |
7124 | if (f) { | |
7125 | spin_lock(&mddev->lock); | |
7126 | mddev->bitmap_info.file = NULL; | |
7127 | spin_unlock(&mddev->lock); | |
7128 | fput(f); | |
7129 | } | |
36fa3063 N |
7130 | } |
7131 | ||
32a7627c N |
7132 | return err; |
7133 | } | |
7134 | ||
1da177e4 | 7135 | /* |
7e0adbfc | 7136 | * md_set_array_info is used two different ways |
1da177e4 LT |
7137 | * The original usage is when creating a new array. |
7138 | * In this usage, raid_disks is > 0 and it together with | |
7139 | * level, size, not_persistent,layout,chunksize determine the | |
7140 | * shape of the array. | |
7141 | * This will always create an array with a type-0.90.0 superblock. | |
7142 | * The newer usage is when assembling an array. | |
7143 | * In this case raid_disks will be 0, and the major_version field is | |
7144 | * use to determine which style super-blocks are to be found on the devices. | |
7145 | * The minor and patch _version numbers are also kept incase the | |
7146 | * super_block handler wishes to interpret them. | |
7147 | */ | |
7e0adbfc | 7148 | int md_set_array_info(struct mddev *mddev, struct mdu_array_info_s *info) |
1da177e4 | 7149 | { |
1da177e4 LT |
7150 | if (info->raid_disks == 0) { |
7151 | /* just setting version number for superblock loading */ | |
7152 | if (info->major_version < 0 || | |
50511da3 | 7153 | info->major_version >= ARRAY_SIZE(super_types) || |
1da177e4 LT |
7154 | super_types[info->major_version].name == NULL) { |
7155 | /* maybe try to auto-load a module? */ | |
9d48739e | 7156 | pr_warn("md: superblock version %d not known\n", |
1da177e4 LT |
7157 | info->major_version); |
7158 | return -EINVAL; | |
7159 | } | |
7160 | mddev->major_version = info->major_version; | |
7161 | mddev->minor_version = info->minor_version; | |
7162 | mddev->patch_version = info->patch_version; | |
3f9d7b0d | 7163 | mddev->persistent = !info->not_persistent; |
cbd19983 N |
7164 | /* ensure mddev_put doesn't delete this now that there |
7165 | * is some minimal configuration. | |
7166 | */ | |
9ebc6ef1 | 7167 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
7168 | return 0; |
7169 | } | |
7170 | mddev->major_version = MD_MAJOR_VERSION; | |
7171 | mddev->minor_version = MD_MINOR_VERSION; | |
7172 | mddev->patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 7173 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
7174 | |
7175 | mddev->level = info->level; | |
17115e03 | 7176 | mddev->clevel[0] = 0; |
58c0fed4 | 7177 | mddev->dev_sectors = 2 * (sector_t)info->size; |
1da177e4 LT |
7178 | mddev->raid_disks = info->raid_disks; |
7179 | /* don't set md_minor, it is determined by which /dev/md* was | |
7180 | * openned | |
7181 | */ | |
7182 | if (info->state & (1<<MD_SB_CLEAN)) | |
7183 | mddev->recovery_cp = MaxSector; | |
7184 | else | |
7185 | mddev->recovery_cp = 0; | |
7186 | mddev->persistent = ! info->not_persistent; | |
e691063a | 7187 | mddev->external = 0; |
1da177e4 LT |
7188 | |
7189 | mddev->layout = info->layout; | |
33f2c35a N |
7190 | if (mddev->level == 0) |
7191 | /* Cannot trust RAID0 layout info here */ | |
7192 | mddev->layout = -1; | |
9d8f0363 | 7193 | mddev->chunk_sectors = info->chunk_size >> 9; |
1da177e4 | 7194 | |
2953079c | 7195 | if (mddev->persistent) { |
1b3bae49 N |
7196 | mddev->max_disks = MD_SB_DISKS; |
7197 | mddev->flags = 0; | |
7198 | mddev->sb_flags = 0; | |
2953079c SL |
7199 | } |
7200 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
1da177e4 | 7201 | |
c3d9714e | 7202 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 7203 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
c3d9714e | 7204 | mddev->bitmap_info.offset = 0; |
b2a2703c | 7205 | |
f6705578 N |
7206 | mddev->reshape_position = MaxSector; |
7207 | ||
1da177e4 LT |
7208 | /* |
7209 | * Generate a 128 bit UUID | |
7210 | */ | |
7211 | get_random_bytes(mddev->uuid, 16); | |
7212 | ||
f6705578 | 7213 | mddev->new_level = mddev->level; |
664e7c41 | 7214 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
7215 | mddev->new_layout = mddev->layout; |
7216 | mddev->delta_disks = 0; | |
2c810cdd | 7217 | mddev->reshape_backwards = 0; |
f6705578 | 7218 | |
1da177e4 LT |
7219 | return 0; |
7220 | } | |
7221 | ||
fd01b88c | 7222 | void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors) |
1f403624 | 7223 | { |
efa4b77b | 7224 | lockdep_assert_held(&mddev->reconfig_mutex); |
b522adcd DW |
7225 | |
7226 | if (mddev->external_size) | |
7227 | return; | |
7228 | ||
1f403624 DW |
7229 | mddev->array_sectors = array_sectors; |
7230 | } | |
7231 | EXPORT_SYMBOL(md_set_array_sectors); | |
7232 | ||
fd01b88c | 7233 | static int update_size(struct mddev *mddev, sector_t num_sectors) |
a35b0d69 | 7234 | { |
3cb03002 | 7235 | struct md_rdev *rdev; |
a35b0d69 | 7236 | int rv; |
d71f9f88 | 7237 | int fit = (num_sectors == 0); |
818da59f | 7238 | sector_t old_dev_sectors = mddev->dev_sectors; |
ab5a98b1 | 7239 | |
a35b0d69 N |
7240 | if (mddev->pers->resize == NULL) |
7241 | return -EINVAL; | |
d71f9f88 AN |
7242 | /* The "num_sectors" is the number of sectors of each device that |
7243 | * is used. This can only make sense for arrays with redundancy. | |
7244 | * linear and raid0 always use whatever space is available. We can only | |
7245 | * consider changing this number if no resync or reconstruction is | |
7246 | * happening, and if the new size is acceptable. It must fit before the | |
0f420358 | 7247 | * sb_start or, if that is <data_offset, it must fit before the size |
d71f9f88 AN |
7248 | * of each device. If num_sectors is zero, we find the largest size |
7249 | * that fits. | |
a35b0d69 | 7250 | */ |
f851b60d N |
7251 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
7252 | mddev->sync_thread) | |
a35b0d69 | 7253 | return -EBUSY; |
f97a5528 | 7254 | if (!md_is_rdwr(mddev)) |
bd8839e0 | 7255 | return -EROFS; |
a4a6125a | 7256 | |
dafb20fa | 7257 | rdev_for_each(rdev, mddev) { |
dd8ac336 | 7258 | sector_t avail = rdev->sectors; |
01ab5662 | 7259 | |
d71f9f88 AN |
7260 | if (fit && (num_sectors == 0 || num_sectors > avail)) |
7261 | num_sectors = avail; | |
7262 | if (avail < num_sectors) | |
a35b0d69 N |
7263 | return -ENOSPC; |
7264 | } | |
d71f9f88 | 7265 | rv = mddev->pers->resize(mddev, num_sectors); |
c9483634 | 7266 | if (!rv) { |
818da59f GJ |
7267 | if (mddev_is_clustered(mddev)) |
7268 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
7269 | else if (mddev->queue) { | |
2c247c51 CH |
7270 | set_capacity_and_notify(mddev->gendisk, |
7271 | mddev->array_sectors); | |
c9483634 GJ |
7272 | } |
7273 | } | |
a35b0d69 N |
7274 | return rv; |
7275 | } | |
7276 | ||
fd01b88c | 7277 | static int update_raid_disks(struct mddev *mddev, int raid_disks) |
da943b99 N |
7278 | { |
7279 | int rv; | |
c6563a8c | 7280 | struct md_rdev *rdev; |
da943b99 | 7281 | /* change the number of raid disks */ |
63c70c4f | 7282 | if (mddev->pers->check_reshape == NULL) |
da943b99 | 7283 | return -EINVAL; |
f97a5528 | 7284 | if (!md_is_rdwr(mddev)) |
bd8839e0 | 7285 | return -EROFS; |
da943b99 | 7286 | if (raid_disks <= 0 || |
233fca36 | 7287 | (mddev->max_disks && raid_disks >= mddev->max_disks)) |
da943b99 | 7288 | return -EINVAL; |
f851b60d N |
7289 | if (mddev->sync_thread || |
7290 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || | |
a8da01f7 | 7291 | test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) || |
f851b60d | 7292 | mddev->reshape_position != MaxSector) |
da943b99 | 7293 | return -EBUSY; |
c6563a8c N |
7294 | |
7295 | rdev_for_each(rdev, mddev) { | |
7296 | if (mddev->raid_disks < raid_disks && | |
7297 | rdev->data_offset < rdev->new_data_offset) | |
7298 | return -EINVAL; | |
7299 | if (mddev->raid_disks > raid_disks && | |
7300 | rdev->data_offset > rdev->new_data_offset) | |
7301 | return -EINVAL; | |
7302 | } | |
7303 | ||
63c70c4f | 7304 | mddev->delta_disks = raid_disks - mddev->raid_disks; |
2c810cdd N |
7305 | if (mddev->delta_disks < 0) |
7306 | mddev->reshape_backwards = 1; | |
7307 | else if (mddev->delta_disks > 0) | |
7308 | mddev->reshape_backwards = 0; | |
63c70c4f N |
7309 | |
7310 | rv = mddev->pers->check_reshape(mddev); | |
2c810cdd | 7311 | if (rv < 0) { |
de171cb9 | 7312 | mddev->delta_disks = 0; |
2c810cdd N |
7313 | mddev->reshape_backwards = 0; |
7314 | } | |
da943b99 N |
7315 | return rv; |
7316 | } | |
7317 | ||
1da177e4 LT |
7318 | /* |
7319 | * update_array_info is used to change the configuration of an | |
7320 | * on-line array. | |
7321 | * The version, ctime,level,size,raid_disks,not_persistent, layout,chunk_size | |
7322 | * fields in the info are checked against the array. | |
7323 | * Any differences that cannot be handled will cause an error. | |
7324 | * Normally, only one change can be managed at a time. | |
7325 | */ | |
fd01b88c | 7326 | static int update_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
7327 | { |
7328 | int rv = 0; | |
7329 | int cnt = 0; | |
36fa3063 N |
7330 | int state = 0; |
7331 | ||
7332 | /* calculate expected state,ignoring low bits */ | |
c3d9714e | 7333 | if (mddev->bitmap && mddev->bitmap_info.offset) |
36fa3063 | 7334 | state |= (1 << MD_SB_BITMAP_PRESENT); |
1da177e4 LT |
7335 | |
7336 | if (mddev->major_version != info->major_version || | |
7337 | mddev->minor_version != info->minor_version || | |
7338 | /* mddev->patch_version != info->patch_version || */ | |
7339 | mddev->ctime != info->ctime || | |
7340 | mddev->level != info->level || | |
7341 | /* mddev->layout != info->layout || */ | |
4e023612 | 7342 | mddev->persistent != !info->not_persistent || |
9d8f0363 | 7343 | mddev->chunk_sectors != info->chunk_size >> 9 || |
36fa3063 N |
7344 | /* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */ |
7345 | ((state^info->state) & 0xfffffe00) | |
7346 | ) | |
1da177e4 LT |
7347 | return -EINVAL; |
7348 | /* Check there is only one change */ | |
58c0fed4 AN |
7349 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
7350 | cnt++; | |
7351 | if (mddev->raid_disks != info->raid_disks) | |
7352 | cnt++; | |
7353 | if (mddev->layout != info->layout) | |
7354 | cnt++; | |
7355 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) | |
7356 | cnt++; | |
7357 | if (cnt == 0) | |
7358 | return 0; | |
7359 | if (cnt > 1) | |
7360 | return -EINVAL; | |
1da177e4 LT |
7361 | |
7362 | if (mddev->layout != info->layout) { | |
7363 | /* Change layout | |
7364 | * we don't need to do anything at the md level, the | |
7365 | * personality will take care of it all. | |
7366 | */ | |
50ac168a | 7367 | if (mddev->pers->check_reshape == NULL) |
1da177e4 | 7368 | return -EINVAL; |
597a711b N |
7369 | else { |
7370 | mddev->new_layout = info->layout; | |
50ac168a | 7371 | rv = mddev->pers->check_reshape(mddev); |
597a711b N |
7372 | if (rv) |
7373 | mddev->new_layout = mddev->layout; | |
7374 | return rv; | |
7375 | } | |
1da177e4 | 7376 | } |
58c0fed4 | 7377 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
d71f9f88 | 7378 | rv = update_size(mddev, (sector_t)info->size * 2); |
a35b0d69 | 7379 | |
da943b99 N |
7380 | if (mddev->raid_disks != info->raid_disks) |
7381 | rv = update_raid_disks(mddev, info->raid_disks); | |
7382 | ||
36fa3063 | 7383 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) { |
293467aa GR |
7384 | if (mddev->pers->quiesce == NULL || mddev->thread == NULL) { |
7385 | rv = -EINVAL; | |
7386 | goto err; | |
7387 | } | |
7388 | if (mddev->recovery || mddev->sync_thread) { | |
7389 | rv = -EBUSY; | |
7390 | goto err; | |
7391 | } | |
36fa3063 | 7392 | if (info->state & (1<<MD_SB_BITMAP_PRESENT)) { |
f9209a32 | 7393 | struct bitmap *bitmap; |
36fa3063 | 7394 | /* add the bitmap */ |
293467aa GR |
7395 | if (mddev->bitmap) { |
7396 | rv = -EEXIST; | |
7397 | goto err; | |
7398 | } | |
7399 | if (mddev->bitmap_info.default_offset == 0) { | |
7400 | rv = -EINVAL; | |
7401 | goto err; | |
7402 | } | |
c3d9714e N |
7403 | mddev->bitmap_info.offset = |
7404 | mddev->bitmap_info.default_offset; | |
6409bb05 N |
7405 | mddev->bitmap_info.space = |
7406 | mddev->bitmap_info.default_space; | |
e64e4018 | 7407 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7408 | mddev_suspend(mddev); |
f9209a32 GR |
7409 | if (!IS_ERR(bitmap)) { |
7410 | mddev->bitmap = bitmap; | |
e64e4018 | 7411 | rv = md_bitmap_load(mddev); |
ba599aca N |
7412 | } else |
7413 | rv = PTR_ERR(bitmap); | |
36fa3063 | 7414 | if (rv) |
e64e4018 | 7415 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7416 | mddev_resume(mddev); |
36fa3063 N |
7417 | } else { |
7418 | /* remove the bitmap */ | |
293467aa GR |
7419 | if (!mddev->bitmap) { |
7420 | rv = -ENOENT; | |
7421 | goto err; | |
7422 | } | |
7423 | if (mddev->bitmap->storage.file) { | |
7424 | rv = -EINVAL; | |
7425 | goto err; | |
7426 | } | |
f6a2dc64 GJ |
7427 | if (mddev->bitmap_info.nodes) { |
7428 | /* hold PW on all the bitmap lock */ | |
7429 | if (md_cluster_ops->lock_all_bitmaps(mddev) <= 0) { | |
9d48739e | 7430 | pr_warn("md: can't change bitmap to none since the array is in use by more than one node\n"); |
f6a2dc64 GJ |
7431 | rv = -EPERM; |
7432 | md_cluster_ops->unlock_all_bitmaps(mddev); | |
7433 | goto err; | |
7434 | } | |
7435 | ||
7436 | mddev->bitmap_info.nodes = 0; | |
7437 | md_cluster_ops->leave(mddev); | |
edee9dfe | 7438 | module_put(md_cluster_mod); |
7c9d5c54 | 7439 | mddev->safemode_delay = DEFAULT_SAFEMODE_DELAY; |
f6a2dc64 | 7440 | } |
9e1cc0a5 | 7441 | mddev_suspend(mddev); |
e64e4018 | 7442 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7443 | mddev_resume(mddev); |
c3d9714e | 7444 | mddev->bitmap_info.offset = 0; |
36fa3063 N |
7445 | } |
7446 | } | |
850b2b42 | 7447 | md_update_sb(mddev, 1); |
293467aa GR |
7448 | return rv; |
7449 | err: | |
1da177e4 LT |
7450 | return rv; |
7451 | } | |
7452 | ||
fd01b88c | 7453 | static int set_disk_faulty(struct mddev *mddev, dev_t dev) |
1da177e4 | 7454 | { |
3cb03002 | 7455 | struct md_rdev *rdev; |
1ca69c4b | 7456 | int err = 0; |
1da177e4 LT |
7457 | |
7458 | if (mddev->pers == NULL) | |
7459 | return -ENODEV; | |
7460 | ||
1ca69c4b | 7461 | rcu_read_lock(); |
1532d9e8 | 7462 | rdev = md_find_rdev_rcu(mddev, dev); |
1da177e4 | 7463 | if (!rdev) |
1ca69c4b N |
7464 | err = -ENODEV; |
7465 | else { | |
7466 | md_error(mddev, rdev); | |
9631abdb | 7467 | if (test_bit(MD_BROKEN, &mddev->flags)) |
1ca69c4b N |
7468 | err = -EBUSY; |
7469 | } | |
7470 | rcu_read_unlock(); | |
7471 | return err; | |
1da177e4 LT |
7472 | } |
7473 | ||
2f9618ce AN |
7474 | /* |
7475 | * We have a problem here : there is no easy way to give a CHS | |
7476 | * virtual geometry. We currently pretend that we have a 2 heads | |
7477 | * 4 sectors (with a BIG number of cylinders...). This drives | |
7478 | * dosfs just mad... ;-) | |
7479 | */ | |
a885c8c4 CH |
7480 | static int md_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
7481 | { | |
fd01b88c | 7482 | struct mddev *mddev = bdev->bd_disk->private_data; |
a885c8c4 CH |
7483 | |
7484 | geo->heads = 2; | |
7485 | geo->sectors = 4; | |
49ce6cea | 7486 | geo->cylinders = mddev->array_sectors / 8; |
a885c8c4 CH |
7487 | return 0; |
7488 | } | |
7489 | ||
cb335f88 NS |
7490 | static inline bool md_ioctl_valid(unsigned int cmd) |
7491 | { | |
7492 | switch (cmd) { | |
7493 | case ADD_NEW_DISK: | |
cb335f88 NS |
7494 | case GET_ARRAY_INFO: |
7495 | case GET_BITMAP_FILE: | |
7496 | case GET_DISK_INFO: | |
7497 | case HOT_ADD_DISK: | |
7498 | case HOT_REMOVE_DISK: | |
cb335f88 NS |
7499 | case RAID_VERSION: |
7500 | case RESTART_ARRAY_RW: | |
7501 | case RUN_ARRAY: | |
7502 | case SET_ARRAY_INFO: | |
7503 | case SET_BITMAP_FILE: | |
7504 | case SET_DISK_FAULTY: | |
7505 | case STOP_ARRAY: | |
7506 | case STOP_ARRAY_RO: | |
1aee41f6 | 7507 | case CLUSTERED_DISK_NACK: |
cb335f88 NS |
7508 | return true; |
7509 | default: | |
7510 | return false; | |
7511 | } | |
7512 | } | |
7513 | ||
2f6d261e YB |
7514 | static int __md_set_array_info(struct mddev *mddev, void __user *argp) |
7515 | { | |
7516 | mdu_array_info_t info; | |
7517 | int err; | |
7518 | ||
7519 | if (!argp) | |
7520 | memset(&info, 0, sizeof(info)); | |
7521 | else if (copy_from_user(&info, argp, sizeof(info))) | |
7522 | return -EFAULT; | |
7523 | ||
7524 | if (mddev->pers) { | |
7525 | err = update_array_info(mddev, &info); | |
7526 | if (err) | |
7527 | pr_warn("md: couldn't update array info. %d\n", err); | |
7528 | return err; | |
7529 | } | |
7530 | ||
7531 | if (!list_empty(&mddev->disks)) { | |
7532 | pr_warn("md: array %s already has disks!\n", mdname(mddev)); | |
7533 | return -EBUSY; | |
7534 | } | |
7535 | ||
7536 | if (mddev->raid_disks) { | |
7537 | pr_warn("md: array %s already initialised!\n", mdname(mddev)); | |
7538 | return -EBUSY; | |
7539 | } | |
7540 | ||
7541 | err = md_set_array_info(mddev, &info); | |
7542 | if (err) | |
7543 | pr_warn("md: couldn't set array info. %d\n", err); | |
7544 | ||
7545 | return err; | |
7546 | } | |
7547 | ||
05bdb996 | 7548 | static int md_ioctl(struct block_device *bdev, blk_mode_t mode, |
1da177e4 LT |
7549 | unsigned int cmd, unsigned long arg) |
7550 | { | |
7551 | int err = 0; | |
7552 | void __user *argp = (void __user *)arg; | |
fd01b88c | 7553 | struct mddev *mddev = NULL; |
065e519e | 7554 | bool did_set_md_closing = false; |
1da177e4 | 7555 | |
cb335f88 NS |
7556 | if (!md_ioctl_valid(cmd)) |
7557 | return -ENOTTY; | |
7558 | ||
506c9e44 N |
7559 | switch (cmd) { |
7560 | case RAID_VERSION: | |
7561 | case GET_ARRAY_INFO: | |
7562 | case GET_DISK_INFO: | |
7563 | break; | |
7564 | default: | |
7565 | if (!capable(CAP_SYS_ADMIN)) | |
7566 | return -EACCES; | |
7567 | } | |
1da177e4 LT |
7568 | |
7569 | /* | |
7570 | * Commands dealing with the RAID driver but not any | |
7571 | * particular array: | |
7572 | */ | |
c02c0aeb N |
7573 | switch (cmd) { |
7574 | case RAID_VERSION: | |
7575 | err = get_version(argp); | |
3adc28d8 | 7576 | goto out; |
c02c0aeb | 7577 | default:; |
1da177e4 LT |
7578 | } |
7579 | ||
7580 | /* | |
7581 | * Commands creating/starting a new array: | |
7582 | */ | |
7583 | ||
a39907fa | 7584 | mddev = bdev->bd_disk->private_data; |
1da177e4 LT |
7585 | |
7586 | if (!mddev) { | |
7587 | BUG(); | |
3adc28d8 | 7588 | goto out; |
1da177e4 LT |
7589 | } |
7590 | ||
1ca69c4b N |
7591 | /* Some actions do not requires the mutex */ |
7592 | switch (cmd) { | |
7593 | case GET_ARRAY_INFO: | |
7594 | if (!mddev->raid_disks && !mddev->external) | |
7595 | err = -ENODEV; | |
7596 | else | |
7597 | err = get_array_info(mddev, argp); | |
3adc28d8 | 7598 | goto out; |
1ca69c4b N |
7599 | |
7600 | case GET_DISK_INFO: | |
7601 | if (!mddev->raid_disks && !mddev->external) | |
7602 | err = -ENODEV; | |
7603 | else | |
7604 | err = get_disk_info(mddev, argp); | |
3adc28d8 | 7605 | goto out; |
1ca69c4b N |
7606 | |
7607 | case SET_DISK_FAULTY: | |
7608 | err = set_disk_faulty(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7609 | goto out; |
4af1a041 N |
7610 | |
7611 | case GET_BITMAP_FILE: | |
7612 | err = get_bitmap_file(mddev, argp); | |
7613 | goto out; | |
7614 | ||
1ca69c4b N |
7615 | } |
7616 | ||
90f5f7ad HR |
7617 | if (cmd == HOT_REMOVE_DISK) |
7618 | /* need to ensure recovery thread has run */ | |
7619 | wait_event_interruptible_timeout(mddev->sb_wait, | |
7620 | !test_bit(MD_RECOVERY_NEEDED, | |
82a301cb | 7621 | &mddev->recovery), |
90f5f7ad | 7622 | msecs_to_jiffies(5000)); |
260fa034 N |
7623 | if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) { |
7624 | /* Need to flush page cache, and ensure no-one else opens | |
7625 | * and writes | |
7626 | */ | |
7627 | mutex_lock(&mddev->open_mutex); | |
9ba3b7f5 | 7628 | if (mddev->pers && atomic_read(&mddev->openers) > 1) { |
260fa034 N |
7629 | mutex_unlock(&mddev->open_mutex); |
7630 | err = -EBUSY; | |
3adc28d8 | 7631 | goto out; |
260fa034 | 7632 | } |
c731b84b DJ |
7633 | if (test_and_set_bit(MD_CLOSING, &mddev->flags)) { |
7634 | mutex_unlock(&mddev->open_mutex); | |
7635 | err = -EBUSY; | |
7636 | goto out; | |
7637 | } | |
065e519e | 7638 | did_set_md_closing = true; |
260fa034 N |
7639 | mutex_unlock(&mddev->open_mutex); |
7640 | sync_blockdev(bdev); | |
7641 | } | |
1da177e4 LT |
7642 | err = mddev_lock(mddev); |
7643 | if (err) { | |
9d48739e N |
7644 | pr_debug("md: ioctl lock interrupted, reason %d, cmd %d\n", |
7645 | err, cmd); | |
3adc28d8 | 7646 | goto out; |
1da177e4 LT |
7647 | } |
7648 | ||
c02c0aeb | 7649 | if (cmd == SET_ARRAY_INFO) { |
2f6d261e | 7650 | err = __md_set_array_info(mddev, argp); |
3adc28d8 | 7651 | goto unlock; |
1da177e4 LT |
7652 | } |
7653 | ||
7654 | /* | |
7655 | * Commands querying/configuring an existing array: | |
7656 | */ | |
32a7627c | 7657 | /* if we are not initialised yet, only ADD_NEW_DISK, STOP_ARRAY, |
3f9d7b0d | 7658 | * RUN_ARRAY, and GET_ and SET_BITMAP_FILE are allowed */ |
a17184a9 N |
7659 | if ((!mddev->raid_disks && !mddev->external) |
7660 | && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY | |
7661 | && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE | |
7662 | && cmd != GET_BITMAP_FILE) { | |
1da177e4 | 7663 | err = -ENODEV; |
3adc28d8 | 7664 | goto unlock; |
1da177e4 LT |
7665 | } |
7666 | ||
7667 | /* | |
7668 | * Commands even a read-only array can execute: | |
7669 | */ | |
c02c0aeb | 7670 | switch (cmd) { |
c02c0aeb N |
7671 | case RESTART_ARRAY_RW: |
7672 | err = restart_array(mddev); | |
3adc28d8 | 7673 | goto unlock; |
1da177e4 | 7674 | |
c02c0aeb N |
7675 | case STOP_ARRAY: |
7676 | err = do_md_stop(mddev, 0, bdev); | |
3adc28d8 | 7677 | goto unlock; |
1da177e4 | 7678 | |
c02c0aeb N |
7679 | case STOP_ARRAY_RO: |
7680 | err = md_set_readonly(mddev, bdev); | |
3adc28d8 | 7681 | goto unlock; |
1da177e4 | 7682 | |
3ea8929d N |
7683 | case HOT_REMOVE_DISK: |
7684 | err = hot_remove_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7685 | goto unlock; |
3ea8929d | 7686 | |
7ceb17e8 N |
7687 | case ADD_NEW_DISK: |
7688 | /* We can support ADD_NEW_DISK on read-only arrays | |
466ad292 | 7689 | * only if we are re-adding a preexisting device. |
7ceb17e8 N |
7690 | * So require mddev->pers and MD_DISK_SYNC. |
7691 | */ | |
7692 | if (mddev->pers) { | |
7693 | mdu_disk_info_t info; | |
7694 | if (copy_from_user(&info, argp, sizeof(info))) | |
7695 | err = -EFAULT; | |
7696 | else if (!(info.state & (1<<MD_DISK_SYNC))) | |
7697 | /* Need to clear read-only for this */ | |
7698 | break; | |
7699 | else | |
7e0adbfc | 7700 | err = md_add_new_disk(mddev, &info); |
3adc28d8 | 7701 | goto unlock; |
7ceb17e8 N |
7702 | } |
7703 | break; | |
1da177e4 LT |
7704 | } |
7705 | ||
7706 | /* | |
7707 | * The remaining ioctls are changing the state of the | |
f91de92e | 7708 | * superblock, so we do not allow them on read-only arrays. |
1da177e4 | 7709 | */ |
f97a5528 YB |
7710 | if (!md_is_rdwr(mddev) && mddev->pers) { |
7711 | if (mddev->ro != MD_AUTO_READ) { | |
f91de92e | 7712 | err = -EROFS; |
3adc28d8 | 7713 | goto unlock; |
f91de92e | 7714 | } |
f97a5528 YB |
7715 | mddev->ro = MD_RDWR; |
7716 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
7717 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7718 | /* mddev_unlock will wake thread */ | |
7719 | /* If a device failed while we were read-only, we | |
7720 | * need to make sure the metadata is updated now. | |
7721 | */ | |
7722 | if (test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) { | |
7723 | mddev_unlock(mddev); | |
7724 | wait_event(mddev->sb_wait, | |
7725 | !test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags) && | |
7726 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); | |
7727 | mddev_lock_nointr(mddev); | |
7728 | } | |
1da177e4 LT |
7729 | } |
7730 | ||
c02c0aeb N |
7731 | switch (cmd) { |
7732 | case ADD_NEW_DISK: | |
1da177e4 | 7733 | { |
c02c0aeb N |
7734 | mdu_disk_info_t info; |
7735 | if (copy_from_user(&info, argp, sizeof(info))) | |
7736 | err = -EFAULT; | |
7737 | else | |
7e0adbfc | 7738 | err = md_add_new_disk(mddev, &info); |
3adc28d8 | 7739 | goto unlock; |
c02c0aeb | 7740 | } |
1da177e4 | 7741 | |
1aee41f6 GR |
7742 | case CLUSTERED_DISK_NACK: |
7743 | if (mddev_is_clustered(mddev)) | |
7744 | md_cluster_ops->new_disk_ack(mddev, false); | |
7745 | else | |
7746 | err = -EINVAL; | |
7747 | goto unlock; | |
7748 | ||
c02c0aeb N |
7749 | case HOT_ADD_DISK: |
7750 | err = hot_add_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7751 | goto unlock; |
1da177e4 | 7752 | |
c02c0aeb N |
7753 | case RUN_ARRAY: |
7754 | err = do_md_run(mddev); | |
3adc28d8 | 7755 | goto unlock; |
1da177e4 | 7756 | |
c02c0aeb N |
7757 | case SET_BITMAP_FILE: |
7758 | err = set_bitmap_file(mddev, (int)arg); | |
3adc28d8 | 7759 | goto unlock; |
32a7627c | 7760 | |
c02c0aeb N |
7761 | default: |
7762 | err = -EINVAL; | |
3adc28d8 | 7763 | goto unlock; |
1da177e4 LT |
7764 | } |
7765 | ||
3adc28d8 | 7766 | unlock: |
d3374825 N |
7767 | if (mddev->hold_active == UNTIL_IOCTL && |
7768 | err != -EINVAL) | |
7769 | mddev->hold_active = 0; | |
1da177e4 | 7770 | mddev_unlock(mddev); |
3adc28d8 | 7771 | out: |
065e519e N |
7772 | if(did_set_md_closing) |
7773 | clear_bit(MD_CLOSING, &mddev->flags); | |
1da177e4 LT |
7774 | return err; |
7775 | } | |
aa98aa31 | 7776 | #ifdef CONFIG_COMPAT |
05bdb996 | 7777 | static int md_compat_ioctl(struct block_device *bdev, blk_mode_t mode, |
aa98aa31 AB |
7778 | unsigned int cmd, unsigned long arg) |
7779 | { | |
7780 | switch (cmd) { | |
7781 | case HOT_REMOVE_DISK: | |
7782 | case HOT_ADD_DISK: | |
7783 | case SET_DISK_FAULTY: | |
7784 | case SET_BITMAP_FILE: | |
7785 | /* These take in integer arg, do not convert */ | |
7786 | break; | |
7787 | default: | |
7788 | arg = (unsigned long)compat_ptr(arg); | |
7789 | break; | |
7790 | } | |
7791 | ||
7792 | return md_ioctl(bdev, mode, cmd, arg); | |
7793 | } | |
7794 | #endif /* CONFIG_COMPAT */ | |
1da177e4 | 7795 | |
118cf084 CH |
7796 | static int md_set_read_only(struct block_device *bdev, bool ro) |
7797 | { | |
7798 | struct mddev *mddev = bdev->bd_disk->private_data; | |
7799 | int err; | |
7800 | ||
7801 | err = mddev_lock(mddev); | |
7802 | if (err) | |
7803 | return err; | |
7804 | ||
7805 | if (!mddev->raid_disks && !mddev->external) { | |
7806 | err = -ENODEV; | |
7807 | goto out_unlock; | |
7808 | } | |
7809 | ||
7810 | /* | |
7811 | * Transitioning to read-auto need only happen for arrays that call | |
7812 | * md_write_start and which are not ready for writes yet. | |
7813 | */ | |
f97a5528 | 7814 | if (!ro && mddev->ro == MD_RDONLY && mddev->pers) { |
118cf084 CH |
7815 | err = restart_array(mddev); |
7816 | if (err) | |
7817 | goto out_unlock; | |
f97a5528 | 7818 | mddev->ro = MD_AUTO_READ; |
118cf084 CH |
7819 | } |
7820 | ||
7821 | out_unlock: | |
7822 | mddev_unlock(mddev); | |
7823 | return err; | |
7824 | } | |
7825 | ||
05bdb996 | 7826 | static int md_open(struct gendisk *disk, blk_mode_t mode) |
1da177e4 | 7827 | { |
5b26804b | 7828 | struct mddev *mddev; |
1da177e4 LT |
7829 | int err; |
7830 | ||
5b26804b | 7831 | spin_lock(&all_mddevs_lock); |
d32e2bf8 | 7832 | mddev = mddev_get(disk->private_data); |
5b26804b | 7833 | spin_unlock(&all_mddevs_lock); |
0c098220 YL |
7834 | if (!mddev) |
7835 | return -ENODEV; | |
7836 | ||
5b26804b CH |
7837 | err = mutex_lock_interruptible(&mddev->open_mutex); |
7838 | if (err) | |
1da177e4 LT |
7839 | goto out; |
7840 | ||
5b26804b CH |
7841 | err = -ENODEV; |
7842 | if (test_bit(MD_CLOSING, &mddev->flags)) | |
7843 | goto out_unlock; | |
af8d8e6f | 7844 | |
f2ea68cf | 7845 | atomic_inc(&mddev->openers); |
c8c00a69 | 7846 | mutex_unlock(&mddev->open_mutex); |
1da177e4 | 7847 | |
d32e2bf8 | 7848 | disk_check_media_change(disk); |
5b26804b CH |
7849 | return 0; |
7850 | ||
7851 | out_unlock: | |
7852 | mutex_unlock(&mddev->open_mutex); | |
7853 | out: | |
7854 | mddev_put(mddev); | |
1da177e4 LT |
7855 | return err; |
7856 | } | |
7857 | ||
ae220766 | 7858 | static void md_release(struct gendisk *disk) |
1da177e4 | 7859 | { |
f72ffdd6 | 7860 | struct mddev *mddev = disk->private_data; |
1da177e4 | 7861 | |
52e5f9d1 | 7862 | BUG_ON(!mddev); |
f2ea68cf | 7863 | atomic_dec(&mddev->openers); |
1da177e4 | 7864 | mddev_put(mddev); |
1da177e4 | 7865 | } |
f0b4f7e2 | 7866 | |
a564e23f | 7867 | static unsigned int md_check_events(struct gendisk *disk, unsigned int clearing) |
f0b4f7e2 | 7868 | { |
fd01b88c | 7869 | struct mddev *mddev = disk->private_data; |
a564e23f | 7870 | unsigned int ret = 0; |
f0b4f7e2 | 7871 | |
a564e23f CH |
7872 | if (mddev->changed) |
7873 | ret = DISK_EVENT_MEDIA_CHANGE; | |
f0b4f7e2 | 7874 | mddev->changed = 0; |
a564e23f | 7875 | return ret; |
f0b4f7e2 | 7876 | } |
a564e23f | 7877 | |
e8c59ac4 CH |
7878 | static void md_free_disk(struct gendisk *disk) |
7879 | { | |
7880 | struct mddev *mddev = disk->private_data; | |
7881 | ||
433279be | 7882 | percpu_ref_exit(&mddev->writes_pending); |
12a6caf2 | 7883 | mddev_free(mddev); |
e8c59ac4 CH |
7884 | } |
7885 | ||
7e0adbfc | 7886 | const struct block_device_operations md_fops = |
1da177e4 LT |
7887 | { |
7888 | .owner = THIS_MODULE, | |
c62b37d9 | 7889 | .submit_bio = md_submit_bio, |
a39907fa AV |
7890 | .open = md_open, |
7891 | .release = md_release, | |
b492b852 | 7892 | .ioctl = md_ioctl, |
aa98aa31 AB |
7893 | #ifdef CONFIG_COMPAT |
7894 | .compat_ioctl = md_compat_ioctl, | |
7895 | #endif | |
a885c8c4 | 7896 | .getgeo = md_getgeo, |
a564e23f | 7897 | .check_events = md_check_events, |
118cf084 | 7898 | .set_read_only = md_set_read_only, |
e8c59ac4 | 7899 | .free_disk = md_free_disk, |
1da177e4 LT |
7900 | }; |
7901 | ||
f72ffdd6 | 7902 | static int md_thread(void *arg) |
1da177e4 | 7903 | { |
2b8bf345 | 7904 | struct md_thread *thread = arg; |
1da177e4 | 7905 | |
1da177e4 LT |
7906 | /* |
7907 | * md_thread is a 'system-thread', it's priority should be very | |
7908 | * high. We avoid resource deadlocks individually in each | |
7909 | * raid personality. (RAID5 does preallocation) We also use RR and | |
7910 | * the very same RT priority as kswapd, thus we will never get | |
7911 | * into a priority inversion deadlock. | |
7912 | * | |
7913 | * we definitely have to have equal or higher priority than | |
7914 | * bdflush, otherwise bdflush will deadlock if there are too | |
7915 | * many dirty RAID5 blocks. | |
7916 | */ | |
1da177e4 | 7917 | |
6985c43f | 7918 | allow_signal(SIGKILL); |
a6fb0934 | 7919 | while (!kthread_should_stop()) { |
1da177e4 | 7920 | |
93588e22 N |
7921 | /* We need to wait INTERRUPTIBLE so that |
7922 | * we don't add to the load-average. | |
7923 | * That means we need to be sure no signals are | |
7924 | * pending | |
7925 | */ | |
7926 | if (signal_pending(current)) | |
7927 | flush_signals(current); | |
7928 | ||
7929 | wait_event_interruptible_timeout | |
7930 | (thread->wqueue, | |
7931 | test_bit(THREAD_WAKEUP, &thread->flags) | |
ce1ccd07 | 7932 | || kthread_should_stop() || kthread_should_park(), |
93588e22 | 7933 | thread->timeout); |
1da177e4 | 7934 | |
6c987910 | 7935 | clear_bit(THREAD_WAKEUP, &thread->flags); |
ce1ccd07 SL |
7936 | if (kthread_should_park()) |
7937 | kthread_parkme(); | |
6c987910 | 7938 | if (!kthread_should_stop()) |
4ed8731d | 7939 | thread->run(thread); |
1da177e4 | 7940 | } |
a6fb0934 | 7941 | |
1da177e4 LT |
7942 | return 0; |
7943 | } | |
7944 | ||
44693154 | 7945 | static void md_wakeup_thread_directly(struct md_thread __rcu *thread) |
e5e9b9cb | 7946 | { |
44693154 YK |
7947 | struct md_thread *t; |
7948 | ||
7949 | rcu_read_lock(); | |
7950 | t = rcu_dereference(thread); | |
7951 | if (t) | |
7952 | wake_up_process(t->tsk); | |
7953 | rcu_read_unlock(); | |
e5e9b9cb YK |
7954 | } |
7955 | ||
44693154 | 7956 | void md_wakeup_thread(struct md_thread __rcu *thread) |
1da177e4 | 7957 | { |
44693154 YK |
7958 | struct md_thread *t; |
7959 | ||
7960 | rcu_read_lock(); | |
7961 | t = rcu_dereference(thread); | |
7962 | if (t) { | |
7963 | pr_debug("md: waking up MD thread %s.\n", t->tsk->comm); | |
7964 | set_bit(THREAD_WAKEUP, &t->flags); | |
7965 | wake_up(&t->wqueue); | |
1da177e4 | 7966 | } |
44693154 | 7967 | rcu_read_unlock(); |
1da177e4 | 7968 | } |
6c144d31 | 7969 | EXPORT_SYMBOL(md_wakeup_thread); |
1da177e4 | 7970 | |
4ed8731d SL |
7971 | struct md_thread *md_register_thread(void (*run) (struct md_thread *), |
7972 | struct mddev *mddev, const char *name) | |
1da177e4 | 7973 | { |
2b8bf345 | 7974 | struct md_thread *thread; |
1da177e4 | 7975 | |
2b8bf345 | 7976 | thread = kzalloc(sizeof(struct md_thread), GFP_KERNEL); |
1da177e4 LT |
7977 | if (!thread) |
7978 | return NULL; | |
7979 | ||
1da177e4 LT |
7980 | init_waitqueue_head(&thread->wqueue); |
7981 | ||
1da177e4 LT |
7982 | thread->run = run; |
7983 | thread->mddev = mddev; | |
32a7627c | 7984 | thread->timeout = MAX_SCHEDULE_TIMEOUT; |
0da3c619 N |
7985 | thread->tsk = kthread_run(md_thread, thread, |
7986 | "%s_%s", | |
7987 | mdname(thread->mddev), | |
0232605d | 7988 | name); |
a6fb0934 | 7989 | if (IS_ERR(thread->tsk)) { |
1da177e4 LT |
7990 | kfree(thread); |
7991 | return NULL; | |
7992 | } | |
1da177e4 LT |
7993 | return thread; |
7994 | } | |
6c144d31 | 7995 | EXPORT_SYMBOL(md_register_thread); |
1da177e4 | 7996 | |
7eb8ff02 | 7997 | void md_unregister_thread(struct mddev *mddev, struct md_thread __rcu **threadp) |
1da177e4 | 7998 | { |
7eb8ff02 LL |
7999 | struct md_thread *thread = rcu_dereference_protected(*threadp, |
8000 | lockdep_is_held(&mddev->reconfig_mutex)); | |
1e267742 | 8001 | |
44693154 | 8002 | if (!thread) |
1e267742 | 8003 | return; |
44693154 YK |
8004 | |
8005 | rcu_assign_pointer(*threadp, NULL); | |
8006 | synchronize_rcu(); | |
a6fb0934 | 8007 | |
1e267742 | 8008 | pr_debug("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk)); |
a6fb0934 | 8009 | kthread_stop(thread->tsk); |
1da177e4 LT |
8010 | kfree(thread); |
8011 | } | |
6c144d31 | 8012 | EXPORT_SYMBOL(md_unregister_thread); |
1da177e4 | 8013 | |
fd01b88c | 8014 | void md_error(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 8015 | { |
b2d444d7 | 8016 | if (!rdev || test_bit(Faulty, &rdev->flags)) |
1da177e4 | 8017 | return; |
6bfe0b49 | 8018 | |
de393cde | 8019 | if (!mddev->pers || !mddev->pers->error_handler) |
1da177e4 | 8020 | return; |
9631abdb MT |
8021 | mddev->pers->error_handler(mddev, rdev); |
8022 | ||
c31fea2f MT |
8023 | if (mddev->pers->level == 0 || mddev->pers->level == LEVEL_LINEAR) |
8024 | return; | |
8025 | ||
9631abdb | 8026 | if (mddev->degraded && !test_bit(MD_BROKEN, &mddev->flags)) |
72a23c21 | 8027 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
00bcb4ac | 8028 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 | 8029 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
9631abdb MT |
8030 | if (!test_bit(MD_BROKEN, &mddev->flags)) { |
8031 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8032 | md_wakeup_thread(mddev->thread); | |
8033 | } | |
768a418d | 8034 | if (mddev->event_work.func) |
e804ac78 | 8035 | queue_work(md_misc_wq, &mddev->event_work); |
54679486 | 8036 | md_new_event(); |
1da177e4 | 8037 | } |
6c144d31 | 8038 | EXPORT_SYMBOL(md_error); |
1da177e4 LT |
8039 | |
8040 | /* seq_file implementation /proc/mdstat */ | |
8041 | ||
8042 | static void status_unused(struct seq_file *seq) | |
8043 | { | |
8044 | int i = 0; | |
3cb03002 | 8045 | struct md_rdev *rdev; |
1da177e4 LT |
8046 | |
8047 | seq_printf(seq, "unused devices: "); | |
8048 | ||
159ec1fc | 8049 | list_for_each_entry(rdev, &pending_raid_disks, same_set) { |
1da177e4 | 8050 | i++; |
913cce5a | 8051 | seq_printf(seq, "%pg ", rdev->bdev); |
1da177e4 LT |
8052 | } |
8053 | if (!i) | |
8054 | seq_printf(seq, "<none>"); | |
8055 | ||
8056 | seq_printf(seq, "\n"); | |
8057 | } | |
8058 | ||
f7851be7 | 8059 | static int status_resync(struct seq_file *seq, struct mddev *mddev) |
1da177e4 | 8060 | { |
dd71cf6b | 8061 | sector_t max_sectors, resync, res; |
9642fa73 MT |
8062 | unsigned long dt, db = 0; |
8063 | sector_t rt, curr_mark_cnt, resync_mark_cnt; | |
8064 | int scale, recovery_active; | |
4588b42e | 8065 | unsigned int per_milli; |
1da177e4 | 8066 | |
c804cdec N |
8067 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8068 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
dd71cf6b | 8069 | max_sectors = mddev->resync_max_sectors; |
1da177e4 | 8070 | else |
dd71cf6b | 8071 | max_sectors = mddev->dev_sectors; |
1da177e4 | 8072 | |
f7851be7 | 8073 | resync = mddev->curr_resync; |
eac58d08 | 8074 | if (resync < MD_RESYNC_ACTIVE) { |
f7851be7 N |
8075 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) |
8076 | /* Still cleaning up */ | |
8077 | resync = max_sectors; | |
b368856a | 8078 | } else if (resync > max_sectors) { |
d2e2ec82 | 8079 | resync = max_sectors; |
b368856a | 8080 | } else { |
6efddf1e YK |
8081 | res = atomic_read(&mddev->recovery_active); |
8082 | /* | |
8083 | * Resync has started, but the subtraction has overflowed or | |
8084 | * yielded one of the special values. Force it to active to | |
8085 | * ensure the status reports an active resync. | |
8086 | */ | |
8087 | if (resync < res || resync - res < MD_RESYNC_ACTIVE) | |
b368856a | 8088 | resync = MD_RESYNC_ACTIVE; |
6efddf1e YK |
8089 | else |
8090 | resync -= res; | |
b368856a | 8091 | } |
f7851be7 | 8092 | |
eac58d08 | 8093 | if (resync == MD_RESYNC_NONE) { |
0357ba27 GJ |
8094 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery)) { |
8095 | struct md_rdev *rdev; | |
8096 | ||
8097 | rdev_for_each(rdev, mddev) | |
8098 | if (rdev->raid_disk >= 0 && | |
8099 | !test_bit(Faulty, &rdev->flags) && | |
8100 | rdev->recovery_offset != MaxSector && | |
8101 | rdev->recovery_offset) { | |
8102 | seq_printf(seq, "\trecover=REMOTE"); | |
8103 | return 1; | |
8104 | } | |
8105 | if (mddev->reshape_position != MaxSector) | |
8106 | seq_printf(seq, "\treshape=REMOTE"); | |
8107 | else | |
8108 | seq_printf(seq, "\tresync=REMOTE"); | |
8109 | return 1; | |
8110 | } | |
f7851be7 N |
8111 | if (mddev->recovery_cp < MaxSector) { |
8112 | seq_printf(seq, "\tresync=PENDING"); | |
8113 | return 1; | |
8114 | } | |
8115 | return 0; | |
8116 | } | |
eac58d08 | 8117 | if (resync < MD_RESYNC_ACTIVE) { |
f7851be7 N |
8118 | seq_printf(seq, "\tresync=DELAYED"); |
8119 | return 1; | |
8120 | } | |
8121 | ||
403df478 | 8122 | WARN_ON(max_sectors == 0); |
4588b42e | 8123 | /* Pick 'scale' such that (resync>>scale)*1000 will fit |
dd71cf6b | 8124 | * in a sector_t, and (max_sectors>>scale) will fit in a |
4588b42e N |
8125 | * u32, as those are the requirements for sector_div. |
8126 | * Thus 'scale' must be at least 10 | |
8127 | */ | |
8128 | scale = 10; | |
8129 | if (sizeof(sector_t) > sizeof(unsigned long)) { | |
dd71cf6b | 8130 | while ( max_sectors/2 > (1ULL<<(scale+32))) |
4588b42e N |
8131 | scale++; |
8132 | } | |
8133 | res = (resync>>scale)*1000; | |
dd71cf6b | 8134 | sector_div(res, (u32)((max_sectors>>scale)+1)); |
4588b42e N |
8135 | |
8136 | per_milli = res; | |
1da177e4 | 8137 | { |
4588b42e | 8138 | int i, x = per_milli/50, y = 20-x; |
1da177e4 LT |
8139 | seq_printf(seq, "["); |
8140 | for (i = 0; i < x; i++) | |
8141 | seq_printf(seq, "="); | |
8142 | seq_printf(seq, ">"); | |
8143 | for (i = 0; i < y; i++) | |
8144 | seq_printf(seq, "."); | |
8145 | seq_printf(seq, "] "); | |
8146 | } | |
4588b42e | 8147 | seq_printf(seq, " %s =%3u.%u%% (%llu/%llu)", |
ccfcc3c1 N |
8148 | (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)? |
8149 | "reshape" : | |
61df9d91 N |
8150 | (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)? |
8151 | "check" : | |
8152 | (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? | |
8153 | "resync" : "recovery"))), | |
8154 | per_milli/10, per_milli % 10, | |
dd71cf6b N |
8155 | (unsigned long long) resync/2, |
8156 | (unsigned long long) max_sectors/2); | |
1da177e4 LT |
8157 | |
8158 | /* | |
1da177e4 LT |
8159 | * dt: time from mark until now |
8160 | * db: blocks written from mark until now | |
8161 | * rt: remaining time | |
dd71cf6b | 8162 | * |
9642fa73 MT |
8163 | * rt is a sector_t, which is always 64bit now. We are keeping |
8164 | * the original algorithm, but it is not really necessary. | |
8165 | * | |
8166 | * Original algorithm: | |
8167 | * So we divide before multiply in case it is 32bit and close | |
8168 | * to the limit. | |
8169 | * We scale the divisor (db) by 32 to avoid losing precision | |
8170 | * near the end of resync when the number of remaining sectors | |
8171 | * is close to 'db'. | |
8172 | * We then divide rt by 32 after multiplying by db to compensate. | |
8173 | * The '+1' avoids division by zero if db is very small. | |
1da177e4 LT |
8174 | */ |
8175 | dt = ((jiffies - mddev->resync_mark) / HZ); | |
8176 | if (!dt) dt++; | |
9642fa73 MT |
8177 | |
8178 | curr_mark_cnt = mddev->curr_mark_cnt; | |
8179 | recovery_active = atomic_read(&mddev->recovery_active); | |
8180 | resync_mark_cnt = mddev->resync_mark_cnt; | |
8181 | ||
8182 | if (curr_mark_cnt >= (recovery_active + resync_mark_cnt)) | |
8183 | db = curr_mark_cnt - (recovery_active + resync_mark_cnt); | |
1da177e4 | 8184 | |
dd71cf6b | 8185 | rt = max_sectors - resync; /* number of remaining sectors */ |
9642fa73 | 8186 | rt = div64_u64(rt, db/32+1); |
dd71cf6b N |
8187 | rt *= dt; |
8188 | rt >>= 5; | |
8189 | ||
8190 | seq_printf(seq, " finish=%lu.%lumin", (unsigned long)rt / 60, | |
8191 | ((unsigned long)rt % 60)/6); | |
1da177e4 | 8192 | |
ff4e8d9a | 8193 | seq_printf(seq, " speed=%ldK/sec", db/2/dt); |
f7851be7 | 8194 | return 1; |
1da177e4 LT |
8195 | } |
8196 | ||
8197 | static void *md_seq_start(struct seq_file *seq, loff_t *pos) | |
8198 | { | |
8199 | struct list_head *tmp; | |
8200 | loff_t l = *pos; | |
fd01b88c | 8201 | struct mddev *mddev; |
1da177e4 | 8202 | |
7abfabaf JG |
8203 | if (l == 0x10000) { |
8204 | ++*pos; | |
8205 | return (void *)2; | |
8206 | } | |
8207 | if (l > 0x10000) | |
1da177e4 LT |
8208 | return NULL; |
8209 | if (!l--) | |
8210 | /* header */ | |
8211 | return (void*)1; | |
8212 | ||
8213 | spin_lock(&all_mddevs_lock); | |
8214 | list_for_each(tmp,&all_mddevs) | |
8215 | if (!l--) { | |
fd01b88c | 8216 | mddev = list_entry(tmp, struct mddev, all_mddevs); |
12a6caf2 CH |
8217 | if (!mddev_get(mddev)) |
8218 | continue; | |
1da177e4 LT |
8219 | spin_unlock(&all_mddevs_lock); |
8220 | return mddev; | |
8221 | } | |
8222 | spin_unlock(&all_mddevs_lock); | |
8223 | if (!l--) | |
8224 | return (void*)2;/* tail */ | |
8225 | return NULL; | |
8226 | } | |
8227 | ||
8228 | static void *md_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
8229 | { | |
8230 | struct list_head *tmp; | |
fd01b88c | 8231 | struct mddev *next_mddev, *mddev = v; |
12a6caf2 | 8232 | struct mddev *to_put = NULL; |
f72ffdd6 | 8233 | |
1da177e4 LT |
8234 | ++*pos; |
8235 | if (v == (void*)2) | |
8236 | return NULL; | |
8237 | ||
8238 | spin_lock(&all_mddevs_lock); | |
12a6caf2 | 8239 | if (v == (void*)1) { |
1da177e4 | 8240 | tmp = all_mddevs.next; |
12a6caf2 CH |
8241 | } else { |
8242 | to_put = mddev; | |
1da177e4 | 8243 | tmp = mddev->all_mddevs.next; |
f72ffdd6 | 8244 | } |
12a6caf2 CH |
8245 | |
8246 | for (;;) { | |
8247 | if (tmp == &all_mddevs) { | |
8248 | next_mddev = (void*)2; | |
8249 | *pos = 0x10000; | |
8250 | break; | |
8251 | } | |
8252 | next_mddev = list_entry(tmp, struct mddev, all_mddevs); | |
8253 | if (mddev_get(next_mddev)) | |
8254 | break; | |
8255 | mddev = next_mddev; | |
8256 | tmp = mddev->all_mddevs.next; | |
c0250d16 | 8257 | } |
1da177e4 LT |
8258 | spin_unlock(&all_mddevs_lock); |
8259 | ||
12a6caf2 | 8260 | if (to_put) |
c8870379 | 8261 | mddev_put(to_put); |
1da177e4 LT |
8262 | return next_mddev; |
8263 | ||
8264 | } | |
8265 | ||
8266 | static void md_seq_stop(struct seq_file *seq, void *v) | |
8267 | { | |
fd01b88c | 8268 | struct mddev *mddev = v; |
1da177e4 LT |
8269 | |
8270 | if (mddev && v != (void*)1 && v != (void*)2) | |
8271 | mddev_put(mddev); | |
8272 | } | |
8273 | ||
8274 | static int md_seq_show(struct seq_file *seq, void *v) | |
8275 | { | |
fd01b88c | 8276 | struct mddev *mddev = v; |
dd8ac336 | 8277 | sector_t sectors; |
3cb03002 | 8278 | struct md_rdev *rdev; |
1da177e4 LT |
8279 | |
8280 | if (v == (void*)1) { | |
84fc4b56 | 8281 | struct md_personality *pers; |
1da177e4 LT |
8282 | seq_printf(seq, "Personalities : "); |
8283 | spin_lock(&pers_lock); | |
2604b703 N |
8284 | list_for_each_entry(pers, &pers_list, list) |
8285 | seq_printf(seq, "[%s] ", pers->name); | |
1da177e4 LT |
8286 | |
8287 | spin_unlock(&pers_lock); | |
8288 | seq_printf(seq, "\n"); | |
f1514638 | 8289 | seq->poll_event = atomic_read(&md_event_count); |
1da177e4 LT |
8290 | return 0; |
8291 | } | |
8292 | if (v == (void*)2) { | |
8293 | status_unused(seq); | |
8294 | return 0; | |
8295 | } | |
8296 | ||
36d091f4 | 8297 | spin_lock(&mddev->lock); |
1da177e4 LT |
8298 | if (mddev->pers || mddev->raid_disks || !list_empty(&mddev->disks)) { |
8299 | seq_printf(seq, "%s : %sactive", mdname(mddev), | |
8300 | mddev->pers ? "" : "in"); | |
8301 | if (mddev->pers) { | |
f97a5528 | 8302 | if (mddev->ro == MD_RDONLY) |
1da177e4 | 8303 | seq_printf(seq, " (read-only)"); |
f97a5528 | 8304 | if (mddev->ro == MD_AUTO_READ) |
52720ae7 | 8305 | seq_printf(seq, " (auto-read-only)"); |
1da177e4 LT |
8306 | seq_printf(seq, " %s", mddev->pers->name); |
8307 | } | |
8308 | ||
dd8ac336 | 8309 | sectors = 0; |
f97fcad3 N |
8310 | rcu_read_lock(); |
8311 | rdev_for_each_rcu(rdev, mddev) { | |
913cce5a CH |
8312 | seq_printf(seq, " %pg[%d]", rdev->bdev, rdev->desc_nr); |
8313 | ||
8ddf9efe N |
8314 | if (test_bit(WriteMostly, &rdev->flags)) |
8315 | seq_printf(seq, "(W)"); | |
9efdca16 SL |
8316 | if (test_bit(Journal, &rdev->flags)) |
8317 | seq_printf(seq, "(J)"); | |
b2d444d7 | 8318 | if (test_bit(Faulty, &rdev->flags)) { |
1da177e4 LT |
8319 | seq_printf(seq, "(F)"); |
8320 | continue; | |
2d78f8c4 N |
8321 | } |
8322 | if (rdev->raid_disk < 0) | |
b325a32e | 8323 | seq_printf(seq, "(S)"); /* spare */ |
2d78f8c4 N |
8324 | if (test_bit(Replacement, &rdev->flags)) |
8325 | seq_printf(seq, "(R)"); | |
dd8ac336 | 8326 | sectors += rdev->sectors; |
1da177e4 | 8327 | } |
f97fcad3 | 8328 | rcu_read_unlock(); |
1da177e4 LT |
8329 | |
8330 | if (!list_empty(&mddev->disks)) { | |
8331 | if (mddev->pers) | |
8332 | seq_printf(seq, "\n %llu blocks", | |
f233ea5c AN |
8333 | (unsigned long long) |
8334 | mddev->array_sectors / 2); | |
1da177e4 LT |
8335 | else |
8336 | seq_printf(seq, "\n %llu blocks", | |
dd8ac336 | 8337 | (unsigned long long)sectors / 2); |
1da177e4 | 8338 | } |
1cd6bf19 N |
8339 | if (mddev->persistent) { |
8340 | if (mddev->major_version != 0 || | |
8341 | mddev->minor_version != 90) { | |
8342 | seq_printf(seq," super %d.%d", | |
8343 | mddev->major_version, | |
8344 | mddev->minor_version); | |
8345 | } | |
e691063a N |
8346 | } else if (mddev->external) |
8347 | seq_printf(seq, " super external:%s", | |
8348 | mddev->metadata_type); | |
8349 | else | |
1cd6bf19 | 8350 | seq_printf(seq, " super non-persistent"); |
1da177e4 LT |
8351 | |
8352 | if (mddev->pers) { | |
d710e138 | 8353 | mddev->pers->status(seq, mddev); |
f72ffdd6 | 8354 | seq_printf(seq, "\n "); |
8e1b39d6 | 8355 | if (mddev->pers->sync_request) { |
f7851be7 | 8356 | if (status_resync(seq, mddev)) |
8e1b39d6 | 8357 | seq_printf(seq, "\n "); |
8e1b39d6 | 8358 | } |
32a7627c N |
8359 | } else |
8360 | seq_printf(seq, "\n "); | |
8361 | ||
e64e4018 | 8362 | md_bitmap_status(seq, mddev->bitmap); |
1da177e4 LT |
8363 | |
8364 | seq_printf(seq, "\n"); | |
8365 | } | |
36d091f4 | 8366 | spin_unlock(&mddev->lock); |
f72ffdd6 | 8367 | |
1da177e4 LT |
8368 | return 0; |
8369 | } | |
8370 | ||
110518bc | 8371 | static const struct seq_operations md_seq_ops = { |
1da177e4 LT |
8372 | .start = md_seq_start, |
8373 | .next = md_seq_next, | |
8374 | .stop = md_seq_stop, | |
8375 | .show = md_seq_show, | |
8376 | }; | |
8377 | ||
8378 | static int md_seq_open(struct inode *inode, struct file *file) | |
8379 | { | |
f1514638 | 8380 | struct seq_file *seq; |
1da177e4 LT |
8381 | int error; |
8382 | ||
8383 | error = seq_open(file, &md_seq_ops); | |
d7603b7e | 8384 | if (error) |
f1514638 KS |
8385 | return error; |
8386 | ||
8387 | seq = file->private_data; | |
8388 | seq->poll_event = atomic_read(&md_event_count); | |
1da177e4 LT |
8389 | return error; |
8390 | } | |
8391 | ||
e2f23b60 | 8392 | static int md_unloading; |
afc9a42b | 8393 | static __poll_t mdstat_poll(struct file *filp, poll_table *wait) |
d7603b7e | 8394 | { |
f1514638 | 8395 | struct seq_file *seq = filp->private_data; |
afc9a42b | 8396 | __poll_t mask; |
d7603b7e | 8397 | |
e2f23b60 | 8398 | if (md_unloading) |
a9a08845 | 8399 | return EPOLLIN|EPOLLRDNORM|EPOLLERR|EPOLLPRI; |
d7603b7e N |
8400 | poll_wait(filp, &md_event_waiters, wait); |
8401 | ||
8402 | /* always allow read */ | |
a9a08845 | 8403 | mask = EPOLLIN | EPOLLRDNORM; |
d7603b7e | 8404 | |
f1514638 | 8405 | if (seq->poll_event != atomic_read(&md_event_count)) |
a9a08845 | 8406 | mask |= EPOLLERR | EPOLLPRI; |
d7603b7e N |
8407 | return mask; |
8408 | } | |
8409 | ||
97a32539 AD |
8410 | static const struct proc_ops mdstat_proc_ops = { |
8411 | .proc_open = md_seq_open, | |
8412 | .proc_read = seq_read, | |
8413 | .proc_lseek = seq_lseek, | |
8414 | .proc_release = seq_release, | |
8415 | .proc_poll = mdstat_poll, | |
1da177e4 LT |
8416 | }; |
8417 | ||
84fc4b56 | 8418 | int register_md_personality(struct md_personality *p) |
1da177e4 | 8419 | { |
9d48739e N |
8420 | pr_debug("md: %s personality registered for level %d\n", |
8421 | p->name, p->level); | |
1da177e4 | 8422 | spin_lock(&pers_lock); |
2604b703 | 8423 | list_add_tail(&p->list, &pers_list); |
1da177e4 LT |
8424 | spin_unlock(&pers_lock); |
8425 | return 0; | |
8426 | } | |
6c144d31 | 8427 | EXPORT_SYMBOL(register_md_personality); |
1da177e4 | 8428 | |
84fc4b56 | 8429 | int unregister_md_personality(struct md_personality *p) |
1da177e4 | 8430 | { |
9d48739e | 8431 | pr_debug("md: %s personality unregistered\n", p->name); |
1da177e4 | 8432 | spin_lock(&pers_lock); |
2604b703 | 8433 | list_del_init(&p->list); |
1da177e4 LT |
8434 | spin_unlock(&pers_lock); |
8435 | return 0; | |
8436 | } | |
6c144d31 | 8437 | EXPORT_SYMBOL(unregister_md_personality); |
1da177e4 | 8438 | |
6022e75b N |
8439 | int register_md_cluster_operations(struct md_cluster_operations *ops, |
8440 | struct module *module) | |
edb39c9d | 8441 | { |
6022e75b | 8442 | int ret = 0; |
edb39c9d | 8443 | spin_lock(&pers_lock); |
6022e75b N |
8444 | if (md_cluster_ops != NULL) |
8445 | ret = -EALREADY; | |
8446 | else { | |
8447 | md_cluster_ops = ops; | |
8448 | md_cluster_mod = module; | |
8449 | } | |
edb39c9d | 8450 | spin_unlock(&pers_lock); |
6022e75b | 8451 | return ret; |
edb39c9d GR |
8452 | } |
8453 | EXPORT_SYMBOL(register_md_cluster_operations); | |
8454 | ||
8455 | int unregister_md_cluster_operations(void) | |
8456 | { | |
8457 | spin_lock(&pers_lock); | |
8458 | md_cluster_ops = NULL; | |
8459 | spin_unlock(&pers_lock); | |
8460 | return 0; | |
8461 | } | |
8462 | EXPORT_SYMBOL(unregister_md_cluster_operations); | |
8463 | ||
8464 | int md_setup_cluster(struct mddev *mddev, int nodes) | |
8465 | { | |
7c9d5c54 | 8466 | int ret; |
47a7b0d8 GJ |
8467 | if (!md_cluster_ops) |
8468 | request_module("md-cluster"); | |
edb39c9d | 8469 | spin_lock(&pers_lock); |
47a7b0d8 | 8470 | /* ensure module won't be unloaded */ |
edb39c9d | 8471 | if (!md_cluster_ops || !try_module_get(md_cluster_mod)) { |
dd3dc5f4 | 8472 | pr_warn("can't find md-cluster module or get its reference.\n"); |
edb39c9d GR |
8473 | spin_unlock(&pers_lock); |
8474 | return -ENOENT; | |
8475 | } | |
8476 | spin_unlock(&pers_lock); | |
8477 | ||
7c9d5c54 ZH |
8478 | ret = md_cluster_ops->join(mddev, nodes); |
8479 | if (!ret) | |
8480 | mddev->safemode_delay = 0; | |
8481 | return ret; | |
edb39c9d GR |
8482 | } |
8483 | ||
8484 | void md_cluster_stop(struct mddev *mddev) | |
8485 | { | |
c4ce867f GR |
8486 | if (!md_cluster_ops) |
8487 | return; | |
edb39c9d GR |
8488 | md_cluster_ops->leave(mddev); |
8489 | module_put(md_cluster_mod); | |
8490 | } | |
8491 | ||
fd01b88c | 8492 | static int is_mddev_idle(struct mddev *mddev, int init) |
1da177e4 | 8493 | { |
f72ffdd6 | 8494 | struct md_rdev *rdev; |
1da177e4 | 8495 | int idle; |
eea1bf38 | 8496 | int curr_events; |
1da177e4 LT |
8497 | |
8498 | idle = 1; | |
4b80991c N |
8499 | rcu_read_lock(); |
8500 | rdev_for_each_rcu(rdev, mddev) { | |
4245e52d | 8501 | struct gendisk *disk = rdev->bdev->bd_disk; |
8446fe92 | 8502 | curr_events = (int)part_stat_read_accum(disk->part0, sectors) - |
eea1bf38 | 8503 | atomic_read(&disk->sync_io); |
713f6ab1 N |
8504 | /* sync IO will cause sync_io to increase before the disk_stats |
8505 | * as sync_io is counted when a request starts, and | |
8506 | * disk_stats is counted when it completes. | |
8507 | * So resync activity will cause curr_events to be smaller than | |
8508 | * when there was no such activity. | |
8509 | * non-sync IO will cause disk_stat to increase without | |
8510 | * increasing sync_io so curr_events will (eventually) | |
8511 | * be larger than it was before. Once it becomes | |
8512 | * substantially larger, the test below will cause | |
8513 | * the array to appear non-idle, and resync will slow | |
8514 | * down. | |
8515 | * If there is a lot of outstanding resync activity when | |
8516 | * we set last_event to curr_events, then all that activity | |
8517 | * completing might cause the array to appear non-idle | |
8518 | * and resync will be slowed down even though there might | |
8519 | * not have been non-resync activity. This will only | |
8520 | * happen once though. 'last_events' will soon reflect | |
8521 | * the state where there is little or no outstanding | |
8522 | * resync requests, and further resync activity will | |
8523 | * always make curr_events less than last_events. | |
c0e48521 | 8524 | * |
1da177e4 | 8525 | */ |
eea1bf38 | 8526 | if (init || curr_events - rdev->last_events > 64) { |
1da177e4 LT |
8527 | rdev->last_events = curr_events; |
8528 | idle = 0; | |
8529 | } | |
8530 | } | |
4b80991c | 8531 | rcu_read_unlock(); |
1da177e4 LT |
8532 | return idle; |
8533 | } | |
8534 | ||
fd01b88c | 8535 | void md_done_sync(struct mddev *mddev, int blocks, int ok) |
1da177e4 LT |
8536 | { |
8537 | /* another "blocks" (512byte) blocks have been synced */ | |
8538 | atomic_sub(blocks, &mddev->recovery_active); | |
8539 | wake_up(&mddev->recovery_wait); | |
8540 | if (!ok) { | |
dfc70645 | 8541 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
0a19caab | 8542 | set_bit(MD_RECOVERY_ERROR, &mddev->recovery); |
1da177e4 LT |
8543 | md_wakeup_thread(mddev->thread); |
8544 | // stop recovery, signal do_sync .... | |
8545 | } | |
8546 | } | |
6c144d31 | 8547 | EXPORT_SYMBOL(md_done_sync); |
1da177e4 | 8548 | |
06d91a5f N |
8549 | /* md_write_start(mddev, bi) |
8550 | * If we need to update some array metadata (e.g. 'active' flag | |
3d310eb7 N |
8551 | * in superblock) before writing, schedule a superblock update |
8552 | * and wait for it to complete. | |
cc27b0c7 N |
8553 | * A return value of 'false' means that the write wasn't recorded |
8554 | * and cannot proceed as the array is being suspend. | |
06d91a5f | 8555 | */ |
cc27b0c7 | 8556 | bool md_write_start(struct mddev *mddev, struct bio *bi) |
1da177e4 | 8557 | { |
0fd62b86 | 8558 | int did_change = 0; |
4b6c1060 | 8559 | |
06d91a5f | 8560 | if (bio_data_dir(bi) != WRITE) |
cc27b0c7 | 8561 | return true; |
06d91a5f | 8562 | |
f97a5528 YB |
8563 | BUG_ON(mddev->ro == MD_RDONLY); |
8564 | if (mddev->ro == MD_AUTO_READ) { | |
f91de92e | 8565 | /* need to switch to read/write */ |
f97a5528 | 8566 | mddev->ro = MD_RDWR; |
f91de92e N |
8567 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
8568 | md_wakeup_thread(mddev->thread); | |
25156198 | 8569 | md_wakeup_thread(mddev->sync_thread); |
0fd62b86 | 8570 | did_change = 1; |
f91de92e | 8571 | } |
4ad23a97 N |
8572 | rcu_read_lock(); |
8573 | percpu_ref_get(&mddev->writes_pending); | |
55cc39f3 | 8574 | smp_mb(); /* Match smp_mb in set_in_sync() */ |
31a59e34 N |
8575 | if (mddev->safemode == 1) |
8576 | mddev->safemode = 0; | |
4ad23a97 | 8577 | /* sync_checkers is always 0 when writes_pending is in per-cpu mode */ |
81fe48e9 | 8578 | if (mddev->in_sync || mddev->sync_checkers) { |
85572d7c | 8579 | spin_lock(&mddev->lock); |
3d310eb7 N |
8580 | if (mddev->in_sync) { |
8581 | mddev->in_sync = 0; | |
2953079c SL |
8582 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8583 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
3d310eb7 | 8584 | md_wakeup_thread(mddev->thread); |
0fd62b86 | 8585 | did_change = 1; |
3d310eb7 | 8586 | } |
85572d7c | 8587 | spin_unlock(&mddev->lock); |
06d91a5f | 8588 | } |
4ad23a97 | 8589 | rcu_read_unlock(); |
0fd62b86 | 8590 | if (did_change) |
00bcb4ac | 8591 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
4b6c1060 HM |
8592 | if (!mddev->has_superblocks) |
8593 | return true; | |
09a44cc1 | 8594 | wait_event(mddev->sb_wait, |
d47c8ad2 | 8595 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags) || |
d1932913 | 8596 | is_md_suspended(mddev)); |
cc27b0c7 N |
8597 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) { |
8598 | percpu_ref_put(&mddev->writes_pending); | |
8599 | return false; | |
8600 | } | |
8601 | return true; | |
1da177e4 | 8602 | } |
6c144d31 | 8603 | EXPORT_SYMBOL(md_write_start); |
1da177e4 | 8604 | |
49728050 N |
8605 | /* md_write_inc can only be called when md_write_start() has |
8606 | * already been called at least once of the current request. | |
8607 | * It increments the counter and is useful when a single request | |
8608 | * is split into several parts. Each part causes an increment and | |
8609 | * so needs a matching md_write_end(). | |
8610 | * Unlike md_write_start(), it is safe to call md_write_inc() inside | |
8611 | * a spinlocked region. | |
8612 | */ | |
8613 | void md_write_inc(struct mddev *mddev, struct bio *bi) | |
8614 | { | |
8615 | if (bio_data_dir(bi) != WRITE) | |
8616 | return; | |
f97a5528 | 8617 | WARN_ON_ONCE(mddev->in_sync || !md_is_rdwr(mddev)); |
4ad23a97 | 8618 | percpu_ref_get(&mddev->writes_pending); |
49728050 N |
8619 | } |
8620 | EXPORT_SYMBOL(md_write_inc); | |
8621 | ||
fd01b88c | 8622 | void md_write_end(struct mddev *mddev) |
1da177e4 | 8623 | { |
4ad23a97 N |
8624 | percpu_ref_put(&mddev->writes_pending); |
8625 | ||
8626 | if (mddev->safemode == 2) | |
8627 | md_wakeup_thread(mddev->thread); | |
8628 | else if (mddev->safemode_delay) | |
8629 | /* The roundup() ensures this only performs locking once | |
8630 | * every ->safemode_delay jiffies | |
8631 | */ | |
8632 | mod_timer(&mddev->safemode_timer, | |
8633 | roundup(jiffies, mddev->safemode_delay) + | |
8634 | mddev->safemode_delay); | |
1da177e4 | 8635 | } |
4ad23a97 | 8636 | |
6c144d31 | 8637 | EXPORT_SYMBOL(md_write_end); |
1da177e4 | 8638 | |
cf78408f XN |
8639 | /* This is used by raid0 and raid10 */ |
8640 | void md_submit_discard_bio(struct mddev *mddev, struct md_rdev *rdev, | |
8641 | struct bio *bio, sector_t start, sector_t size) | |
8642 | { | |
8643 | struct bio *discard_bio = NULL; | |
8644 | ||
44abff2c | 8645 | if (__blkdev_issue_discard(rdev->bdev, start, size, GFP_NOIO, |
cf78408f XN |
8646 | &discard_bio) || !discard_bio) |
8647 | return; | |
8648 | ||
8649 | bio_chain(discard_bio, bio); | |
8650 | bio_clone_blkg_association(discard_bio, bio); | |
8651 | if (mddev->gendisk) | |
8652 | trace_block_bio_remap(discard_bio, | |
8653 | disk_devt(mddev->gendisk), | |
8654 | bio->bi_iter.bi_sector); | |
8655 | submit_bio_noacct(discard_bio); | |
8656 | } | |
8657 | EXPORT_SYMBOL_GPL(md_submit_discard_bio); | |
8658 | ||
c687297b | 8659 | static void md_end_clone_io(struct bio *bio) |
0c031fd3 | 8660 | { |
c687297b YK |
8661 | struct md_io_clone *md_io_clone = bio->bi_private; |
8662 | struct bio *orig_bio = md_io_clone->orig_bio; | |
8663 | struct mddev *mddev = md_io_clone->mddev; | |
10764815 GJ |
8664 | |
8665 | orig_bio->bi_status = bio->bi_status; | |
8666 | ||
c687297b YK |
8667 | if (md_io_clone->start_time) |
8668 | bio_end_io_acct(orig_bio, md_io_clone->start_time); | |
8669 | ||
10764815 GJ |
8670 | bio_put(bio); |
8671 | bio_endio(orig_bio); | |
76fed014 | 8672 | percpu_ref_put(&mddev->active_io); |
10764815 GJ |
8673 | } |
8674 | ||
c687297b | 8675 | static void md_clone_bio(struct mddev *mddev, struct bio **bio) |
10764815 | 8676 | { |
abfc426d | 8677 | struct block_device *bdev = (*bio)->bi_bdev; |
c687297b YK |
8678 | struct md_io_clone *md_io_clone; |
8679 | struct bio *clone = | |
8680 | bio_alloc_clone(bdev, *bio, GFP_NOIO, &mddev->io_clone_set); | |
8681 | ||
8682 | md_io_clone = container_of(clone, struct md_io_clone, bio_clone); | |
8683 | md_io_clone->orig_bio = *bio; | |
8684 | md_io_clone->mddev = mddev; | |
8685 | if (blk_queue_io_stat(bdev->bd_disk->queue)) | |
8686 | md_io_clone->start_time = bio_start_io_acct(*bio); | |
8687 | ||
8688 | clone->bi_end_io = md_end_clone_io; | |
8689 | clone->bi_private = md_io_clone; | |
8690 | *bio = clone; | |
8691 | } | |
10764815 | 8692 | |
c687297b YK |
8693 | void md_account_bio(struct mddev *mddev, struct bio **bio) |
8694 | { | |
76fed014 | 8695 | percpu_ref_get(&mddev->active_io); |
c687297b | 8696 | md_clone_bio(mddev, bio); |
10764815 GJ |
8697 | } |
8698 | EXPORT_SYMBOL_GPL(md_account_bio); | |
8699 | ||
2a2275d6 N |
8700 | /* md_allow_write(mddev) |
8701 | * Calling this ensures that the array is marked 'active' so that writes | |
8702 | * may proceed without blocking. It is important to call this before | |
8703 | * attempting a GFP_KERNEL allocation while holding the mddev lock. | |
8704 | * Must be called with mddev_lock held. | |
8705 | */ | |
2214c260 | 8706 | void md_allow_write(struct mddev *mddev) |
2a2275d6 N |
8707 | { |
8708 | if (!mddev->pers) | |
2214c260 | 8709 | return; |
f97a5528 | 8710 | if (!md_is_rdwr(mddev)) |
2214c260 | 8711 | return; |
1a0fd497 | 8712 | if (!mddev->pers->sync_request) |
2214c260 | 8713 | return; |
2a2275d6 | 8714 | |
85572d7c | 8715 | spin_lock(&mddev->lock); |
2a2275d6 N |
8716 | if (mddev->in_sync) { |
8717 | mddev->in_sync = 0; | |
2953079c SL |
8718 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8719 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
2a2275d6 N |
8720 | if (mddev->safemode_delay && |
8721 | mddev->safemode == 0) | |
8722 | mddev->safemode = 1; | |
85572d7c | 8723 | spin_unlock(&mddev->lock); |
2a2275d6 | 8724 | md_update_sb(mddev, 0); |
00bcb4ac | 8725 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
2214c260 AP |
8726 | /* wait for the dirty state to be recorded in the metadata */ |
8727 | wait_event(mddev->sb_wait, | |
2214c260 | 8728 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
2a2275d6 | 8729 | } else |
85572d7c | 8730 | spin_unlock(&mddev->lock); |
2a2275d6 N |
8731 | } |
8732 | EXPORT_SYMBOL_GPL(md_allow_write); | |
8733 | ||
1da177e4 LT |
8734 | #define SYNC_MARKS 10 |
8735 | #define SYNC_MARK_STEP (3*HZ) | |
54f89341 | 8736 | #define UPDATE_FREQUENCY (5*60*HZ) |
4ed8731d | 8737 | void md_do_sync(struct md_thread *thread) |
1da177e4 | 8738 | { |
4ed8731d | 8739 | struct mddev *mddev = thread->mddev; |
fd01b88c | 8740 | struct mddev *mddev2; |
e5b521ee | 8741 | unsigned int currspeed = 0, window; |
ac7e50a3 | 8742 | sector_t max_sectors,j, io_sectors, recovery_done; |
1da177e4 | 8743 | unsigned long mark[SYNC_MARKS]; |
54f89341 | 8744 | unsigned long update_time; |
1da177e4 LT |
8745 | sector_t mark_cnt[SYNC_MARKS]; |
8746 | int last_mark,m; | |
1da177e4 | 8747 | sector_t last_check; |
57afd89f | 8748 | int skipped = 0; |
3cb03002 | 8749 | struct md_rdev *rdev; |
c4a39551 | 8750 | char *desc, *action = NULL; |
7c2c57c9 | 8751 | struct blk_plug plug; |
41a9a0dc | 8752 | int ret; |
1da177e4 LT |
8753 | |
8754 | /* just incase thread restarts... */ | |
d5d885fd SL |
8755 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
8756 | test_bit(MD_RECOVERY_WAIT, &mddev->recovery)) | |
1da177e4 | 8757 | return; |
f97a5528 | 8758 | if (!md_is_rdwr(mddev)) {/* never try to sync a read-only array */ |
3991b31e | 8759 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
5fd6c1dc | 8760 | return; |
3991b31e | 8761 | } |
1da177e4 | 8762 | |
41a9a0dc GJ |
8763 | if (mddev_is_clustered(mddev)) { |
8764 | ret = md_cluster_ops->resync_start(mddev); | |
8765 | if (ret) | |
8766 | goto skip; | |
8767 | ||
bb8bf15b | 8768 | set_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags); |
41a9a0dc GJ |
8769 | if (!(test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8770 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) || | |
8771 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) | |
8772 | && ((unsigned long long)mddev->curr_resync_completed | |
8773 | < (unsigned long long)mddev->resync_max_sectors)) | |
8774 | goto skip; | |
8775 | } | |
8776 | ||
61df9d91 | 8777 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
c4a39551 | 8778 | if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) { |
61df9d91 | 8779 | desc = "data-check"; |
c4a39551 JB |
8780 | action = "check"; |
8781 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
61df9d91 | 8782 | desc = "requested-resync"; |
c4a39551 JB |
8783 | action = "repair"; |
8784 | } else | |
61df9d91 N |
8785 | desc = "resync"; |
8786 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
8787 | desc = "reshape"; | |
8788 | else | |
8789 | desc = "recovery"; | |
8790 | ||
c4a39551 JB |
8791 | mddev->last_sync_action = action ?: desc; |
8792 | ||
eac58d08 | 8793 | /* |
1da177e4 LT |
8794 | * Before starting a resync we must have set curr_resync to |
8795 | * 2, and then checked that every "conflicting" array has curr_resync | |
8796 | * less than ours. When we find one that is the same or higher | |
8797 | * we wait on resync_wait. To avoid deadlock, we reduce curr_resync | |
8798 | * to 1 if we choose to yield (based arbitrarily on address of mddev structure). | |
8799 | * This will mean we have to start checking from the beginning again. | |
8800 | * | |
8801 | */ | |
8802 | ||
8803 | do { | |
c622ca54 | 8804 | int mddev2_minor = -1; |
eac58d08 | 8805 | mddev->curr_resync = MD_RESYNC_DELAYED; |
1da177e4 LT |
8806 | |
8807 | try_again: | |
404e4b43 | 8808 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
1da177e4 | 8809 | goto skip; |
b0e706a1 CH |
8810 | spin_lock(&all_mddevs_lock); |
8811 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) { | |
12a6caf2 CH |
8812 | if (test_bit(MD_DELETED, &mddev2->flags)) |
8813 | continue; | |
1da177e4 LT |
8814 | if (mddev2 == mddev) |
8815 | continue; | |
90b08710 BS |
8816 | if (!mddev->parallel_resync |
8817 | && mddev2->curr_resync | |
8818 | && match_mddev_units(mddev, mddev2)) { | |
1da177e4 | 8819 | DEFINE_WAIT(wq); |
eac58d08 LG |
8820 | if (mddev < mddev2 && |
8821 | mddev->curr_resync == MD_RESYNC_DELAYED) { | |
1da177e4 | 8822 | /* arbitrarily yield */ |
eac58d08 | 8823 | mddev->curr_resync = MD_RESYNC_YIELDED; |
1da177e4 LT |
8824 | wake_up(&resync_wait); |
8825 | } | |
eac58d08 LG |
8826 | if (mddev > mddev2 && |
8827 | mddev->curr_resync == MD_RESYNC_YIELDED) | |
1da177e4 LT |
8828 | /* no need to wait here, we can wait the next |
8829 | * time 'round when curr_resync == 2 | |
8830 | */ | |
8831 | continue; | |
9744197c N |
8832 | /* We need to wait 'interruptible' so as not to |
8833 | * contribute to the load average, and not to | |
8834 | * be caught by 'softlockup' | |
8835 | */ | |
8836 | prepare_to_wait(&resync_wait, &wq, TASK_INTERRUPTIBLE); | |
c91abf5a | 8837 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
8712e553 | 8838 | mddev2->curr_resync >= mddev->curr_resync) { |
c622ca54 AP |
8839 | if (mddev2_minor != mddev2->md_minor) { |
8840 | mddev2_minor = mddev2->md_minor; | |
9d48739e N |
8841 | pr_info("md: delaying %s of %s until %s has finished (they share one or more physical units)\n", |
8842 | desc, mdname(mddev), | |
8843 | mdname(mddev2)); | |
c622ca54 | 8844 | } |
b0e706a1 CH |
8845 | spin_unlock(&all_mddevs_lock); |
8846 | ||
9744197c N |
8847 | if (signal_pending(current)) |
8848 | flush_signals(current); | |
1da177e4 LT |
8849 | schedule(); |
8850 | finish_wait(&resync_wait, &wq); | |
8851 | goto try_again; | |
8852 | } | |
8853 | finish_wait(&resync_wait, &wq); | |
8854 | } | |
8855 | } | |
b0e706a1 | 8856 | spin_unlock(&all_mddevs_lock); |
eac58d08 | 8857 | } while (mddev->curr_resync < MD_RESYNC_DELAYED); |
1da177e4 | 8858 | |
5fd6c1dc | 8859 | j = 0; |
9d88883e | 8860 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
1da177e4 | 8861 | /* resync follows the size requested by the personality, |
57afd89f | 8862 | * which defaults to physical size, but can be virtual size |
1da177e4 LT |
8863 | */ |
8864 | max_sectors = mddev->resync_max_sectors; | |
7f7583d4 | 8865 | atomic64_set(&mddev->resync_mismatches, 0); |
5fd6c1dc | 8866 | /* we don't use the checkpoint if there's a bitmap */ |
5e96ee65 NB |
8867 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) |
8868 | j = mddev->resync_min; | |
8869 | else if (!mddev->bitmap) | |
5fd6c1dc | 8870 | j = mddev->recovery_cp; |
5e96ee65 | 8871 | |
cb9ee154 | 8872 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) { |
c804cdec | 8873 | max_sectors = mddev->resync_max_sectors; |
cb9ee154 GJ |
8874 | /* |
8875 | * If the original node aborts reshaping then we continue the | |
8876 | * reshaping, so set j again to avoid restart reshape from the | |
8877 | * first beginning | |
8878 | */ | |
8879 | if (mddev_is_clustered(mddev) && | |
8880 | mddev->reshape_position != MaxSector) | |
8881 | j = mddev->reshape_position; | |
8882 | } else { | |
1da177e4 | 8883 | /* recovery follows the physical size of devices */ |
58c0fed4 | 8884 | max_sectors = mddev->dev_sectors; |
5fd6c1dc | 8885 | j = MaxSector; |
4e59ca7d | 8886 | rcu_read_lock(); |
dafb20fa | 8887 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 8888 | if (rdev->raid_disk >= 0 && |
f2076e7d | 8889 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
8890 | !test_bit(Faulty, &rdev->flags) && |
8891 | !test_bit(In_sync, &rdev->flags) && | |
8892 | rdev->recovery_offset < j) | |
8893 | j = rdev->recovery_offset; | |
4e59ca7d | 8894 | rcu_read_unlock(); |
133d4527 N |
8895 | |
8896 | /* If there is a bitmap, we need to make sure all | |
8897 | * writes that started before we added a spare | |
8898 | * complete before we start doing a recovery. | |
8899 | * Otherwise the write might complete and (via | |
8900 | * bitmap_endwrite) set a bit in the bitmap after the | |
8901 | * recovery has checked that bit and skipped that | |
8902 | * region. | |
8903 | */ | |
8904 | if (mddev->bitmap) { | |
8905 | mddev->pers->quiesce(mddev, 1); | |
8906 | mddev->pers->quiesce(mddev, 0); | |
8907 | } | |
5fd6c1dc | 8908 | } |
1da177e4 | 8909 | |
9d48739e N |
8910 | pr_info("md: %s of RAID array %s\n", desc, mdname(mddev)); |
8911 | pr_debug("md: minimum _guaranteed_ speed: %d KB/sec/disk.\n", speed_min(mddev)); | |
8912 | pr_debug("md: using maximum available idle IO bandwidth (but not more than %d KB/sec) for %s.\n", | |
8913 | speed_max(mddev), desc); | |
1da177e4 | 8914 | |
eea1bf38 | 8915 | is_mddev_idle(mddev, 1); /* this initializes IO event counters */ |
5fd6c1dc | 8916 | |
57afd89f | 8917 | io_sectors = 0; |
1da177e4 LT |
8918 | for (m = 0; m < SYNC_MARKS; m++) { |
8919 | mark[m] = jiffies; | |
57afd89f | 8920 | mark_cnt[m] = io_sectors; |
1da177e4 LT |
8921 | } |
8922 | last_mark = 0; | |
8923 | mddev->resync_mark = mark[last_mark]; | |
8924 | mddev->resync_mark_cnt = mark_cnt[last_mark]; | |
8925 | ||
8926 | /* | |
8927 | * Tune reconstruction: | |
8928 | */ | |
e5b521ee | 8929 | window = 32 * (PAGE_SIZE / 512); |
9d48739e N |
8930 | pr_debug("md: using %dk window, over a total of %lluk.\n", |
8931 | window/2, (unsigned long long)max_sectors/2); | |
1da177e4 LT |
8932 | |
8933 | atomic_set(&mddev->recovery_active, 0); | |
1da177e4 LT |
8934 | last_check = 0; |
8935 | ||
ed821cf8 | 8936 | if (j >= MD_RESYNC_ACTIVE) { |
9d48739e N |
8937 | pr_debug("md: resuming %s of %s from checkpoint.\n", |
8938 | desc, mdname(mddev)); | |
1da177e4 | 8939 | mddev->curr_resync = j; |
72f36d59 | 8940 | } else |
eac58d08 | 8941 | mddev->curr_resync = MD_RESYNC_ACTIVE; /* no longer delayed */ |
75d3da43 | 8942 | mddev->curr_resync_completed = j; |
e1a86dbb | 8943 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
54679486 | 8944 | md_new_event(); |
54f89341 | 8945 | update_time = jiffies; |
1da177e4 | 8946 | |
7c2c57c9 | 8947 | blk_start_plug(&plug); |
1da177e4 | 8948 | while (j < max_sectors) { |
57afd89f | 8949 | sector_t sectors; |
1da177e4 | 8950 | |
57afd89f | 8951 | skipped = 0; |
97e4f42d | 8952 | |
7a91ee1f N |
8953 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8954 | ((mddev->curr_resync > mddev->curr_resync_completed && | |
8955 | (mddev->curr_resync - mddev->curr_resync_completed) | |
8956 | > (max_sectors >> 4)) || | |
54f89341 | 8957 | time_after_eq(jiffies, update_time + UPDATE_FREQUENCY) || |
7a91ee1f | 8958 | (j - mddev->curr_resync_completed)*2 |
c5e19d90 N |
8959 | >= mddev->resync_max - mddev->curr_resync_completed || |
8960 | mddev->curr_resync_completed > mddev->resync_max | |
7a91ee1f | 8961 | )) { |
97e4f42d | 8962 | /* time to update curr_resync_completed */ |
97e4f42d N |
8963 | wait_event(mddev->recovery_wait, |
8964 | atomic_read(&mddev->recovery_active) == 0); | |
75d3da43 | 8965 | mddev->curr_resync_completed = j; |
35d78c66 | 8966 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && |
8967 | j > mddev->recovery_cp) | |
8968 | mddev->recovery_cp = j; | |
54f89341 | 8969 | update_time = jiffies; |
2953079c | 8970 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
e1a86dbb | 8971 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
97e4f42d | 8972 | } |
acb180b0 | 8973 | |
c91abf5a N |
8974 | while (j >= mddev->resync_max && |
8975 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
e62e58a5 N |
8976 | /* As this condition is controlled by user-space, |
8977 | * we can block indefinitely, so use '_interruptible' | |
8978 | * to avoid triggering warnings. | |
8979 | */ | |
8980 | flush_signals(current); /* just in case */ | |
8981 | wait_event_interruptible(mddev->recovery_wait, | |
8982 | mddev->resync_max > j | |
c91abf5a N |
8983 | || test_bit(MD_RECOVERY_INTR, |
8984 | &mddev->recovery)); | |
e62e58a5 | 8985 | } |
acb180b0 | 8986 | |
c91abf5a N |
8987 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8988 | break; | |
acb180b0 | 8989 | |
09314799 | 8990 | sectors = mddev->pers->sync_request(mddev, j, &skipped); |
57afd89f | 8991 | if (sectors == 0) { |
dfc70645 | 8992 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
c91abf5a | 8993 | break; |
1da177e4 | 8994 | } |
57afd89f N |
8995 | |
8996 | if (!skipped) { /* actual IO requested */ | |
8997 | io_sectors += sectors; | |
8998 | atomic_add(sectors, &mddev->recovery_active); | |
8999 | } | |
9000 | ||
e875ecea N |
9001 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
9002 | break; | |
9003 | ||
1da177e4 | 9004 | j += sectors; |
5ed1df2e N |
9005 | if (j > max_sectors) |
9006 | /* when skipping, extra large numbers can be returned. */ | |
9007 | j = max_sectors; | |
ed821cf8 | 9008 | if (j >= MD_RESYNC_ACTIVE) |
72f36d59 | 9009 | mddev->curr_resync = j; |
ff4e8d9a | 9010 | mddev->curr_mark_cnt = io_sectors; |
d7603b7e | 9011 | if (last_check == 0) |
e875ecea | 9012 | /* this is the earliest that rebuild will be |
d7603b7e N |
9013 | * visible in /proc/mdstat |
9014 | */ | |
54679486 | 9015 | md_new_event(); |
57afd89f N |
9016 | |
9017 | if (last_check + window > io_sectors || j == max_sectors) | |
1da177e4 LT |
9018 | continue; |
9019 | ||
57afd89f | 9020 | last_check = io_sectors; |
1da177e4 LT |
9021 | repeat: |
9022 | if (time_after_eq(jiffies, mark[last_mark] + SYNC_MARK_STEP )) { | |
9023 | /* step marks */ | |
9024 | int next = (last_mark+1) % SYNC_MARKS; | |
9025 | ||
9026 | mddev->resync_mark = mark[next]; | |
9027 | mddev->resync_mark_cnt = mark_cnt[next]; | |
9028 | mark[next] = jiffies; | |
57afd89f | 9029 | mark_cnt[next] = io_sectors - atomic_read(&mddev->recovery_active); |
1da177e4 LT |
9030 | last_mark = next; |
9031 | } | |
9032 | ||
c91abf5a N |
9033 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
9034 | break; | |
1da177e4 LT |
9035 | |
9036 | /* | |
9037 | * this loop exits only if either when we are slower than | |
9038 | * the 'hard' speed limit, or the system was IO-idle for | |
9039 | * a jiffy. | |
9040 | * the system might be non-idle CPU-wise, but we only care | |
9041 | * about not overloading the IO subsystem. (things like an | |
9042 | * e2fsck being done on the RAID array should execute fast) | |
9043 | */ | |
1da177e4 LT |
9044 | cond_resched(); |
9045 | ||
ac7e50a3 XN |
9046 | recovery_done = io_sectors - atomic_read(&mddev->recovery_active); |
9047 | currspeed = ((unsigned long)(recovery_done - mddev->resync_mark_cnt))/2 | |
57afd89f | 9048 | /((jiffies-mddev->resync_mark)/HZ +1) +1; |
1da177e4 | 9049 | |
88202a0c | 9050 | if (currspeed > speed_min(mddev)) { |
ac8fa419 | 9051 | if (currspeed > speed_max(mddev)) { |
c0e48521 | 9052 | msleep(500); |
1da177e4 LT |
9053 | goto repeat; |
9054 | } | |
ac8fa419 N |
9055 | if (!is_mddev_idle(mddev, 0)) { |
9056 | /* | |
9057 | * Give other IO more of a chance. | |
9058 | * The faster the devices, the less we wait. | |
9059 | */ | |
9060 | wait_event(mddev->recovery_wait, | |
9061 | !atomic_read(&mddev->recovery_active)); | |
9062 | } | |
1da177e4 LT |
9063 | } |
9064 | } | |
9d48739e N |
9065 | pr_info("md: %s: %s %s.\n",mdname(mddev), desc, |
9066 | test_bit(MD_RECOVERY_INTR, &mddev->recovery) | |
9067 | ? "interrupted" : "done"); | |
1da177e4 LT |
9068 | /* |
9069 | * this also signals 'finished resyncing' to md_stop | |
9070 | */ | |
7c2c57c9 | 9071 | blk_finish_plug(&plug); |
1da177e4 LT |
9072 | wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active)); |
9073 | ||
5ed1df2e N |
9074 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9075 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
eac58d08 | 9076 | mddev->curr_resync >= MD_RESYNC_ACTIVE) { |
5ed1df2e | 9077 | mddev->curr_resync_completed = mddev->curr_resync; |
e1a86dbb | 9078 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
5ed1df2e | 9079 | } |
09314799 | 9080 | mddev->pers->sync_request(mddev, max_sectors, &skipped); |
1da177e4 | 9081 | |
dfc70645 | 9082 | if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) && |
1d1f25bf | 9083 | mddev->curr_resync > MD_RESYNC_ACTIVE) { |
5fd6c1dc N |
9084 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
9085 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
9086 | if (mddev->curr_resync >= mddev->recovery_cp) { | |
9d48739e N |
9087 | pr_debug("md: checkpointing %s of %s.\n", |
9088 | desc, mdname(mddev)); | |
0a19caab | 9089 | if (test_bit(MD_RECOVERY_ERROR, |
9090 | &mddev->recovery)) | |
9091 | mddev->recovery_cp = | |
9092 | mddev->curr_resync_completed; | |
9093 | else | |
9094 | mddev->recovery_cp = | |
9095 | mddev->curr_resync; | |
5fd6c1dc N |
9096 | } |
9097 | } else | |
9098 | mddev->recovery_cp = MaxSector; | |
9099 | } else { | |
9100 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) | |
9101 | mddev->curr_resync = MaxSector; | |
db0505d3 N |
9102 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9103 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) { | |
9104 | rcu_read_lock(); | |
9105 | rdev_for_each_rcu(rdev, mddev) | |
9106 | if (rdev->raid_disk >= 0 && | |
9107 | mddev->delta_disks >= 0 && | |
9108 | !test_bit(Journal, &rdev->flags) && | |
9109 | !test_bit(Faulty, &rdev->flags) && | |
9110 | !test_bit(In_sync, &rdev->flags) && | |
9111 | rdev->recovery_offset < mddev->curr_resync) | |
9112 | rdev->recovery_offset = mddev->curr_resync; | |
9113 | rcu_read_unlock(); | |
9114 | } | |
5fd6c1dc | 9115 | } |
1da177e4 | 9116 | } |
db91ff55 | 9117 | skip: |
bb8bf15b GJ |
9118 | /* set CHANGE_PENDING here since maybe another update is needed, |
9119 | * so other nodes are informed. It should be harmless for normal | |
9120 | * raid */ | |
2953079c SL |
9121 | set_mask_bits(&mddev->sb_flags, 0, |
9122 | BIT(MD_SB_CHANGE_PENDING) | BIT(MD_SB_CHANGE_DEVS)); | |
c186b128 | 9123 | |
8876391e BC |
9124 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9125 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
9126 | mddev->delta_disks > 0 && | |
9127 | mddev->pers->finish_reshape && | |
9128 | mddev->pers->size && | |
9129 | mddev->queue) { | |
9130 | mddev_lock_nointr(mddev); | |
9131 | md_set_array_sectors(mddev, mddev->pers->size(mddev, 0, 0)); | |
9132 | mddev_unlock(mddev); | |
2c247c51 CH |
9133 | if (!mddev_is_clustered(mddev)) |
9134 | set_capacity_and_notify(mddev->gendisk, | |
9135 | mddev->array_sectors); | |
8876391e BC |
9136 | } |
9137 | ||
23da422b | 9138 | spin_lock(&mddev->lock); |
c07b70ad N |
9139 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { |
9140 | /* We completed so min/max setting can be forgotten if used. */ | |
9141 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
9142 | mddev->resync_min = 0; | |
9143 | mddev->resync_max = MaxSector; | |
9144 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
9145 | mddev->resync_min = mddev->curr_resync_completed; | |
f7851be7 | 9146 | set_bit(MD_RECOVERY_DONE, &mddev->recovery); |
eac58d08 | 9147 | mddev->curr_resync = MD_RESYNC_NONE; |
23da422b N |
9148 | spin_unlock(&mddev->lock); |
9149 | ||
1da177e4 | 9150 | wake_up(&resync_wait); |
868bba54 | 9151 | wake_up(&mddev->sb_wait); |
1da177e4 | 9152 | md_wakeup_thread(mddev->thread); |
c6207277 | 9153 | return; |
1da177e4 | 9154 | } |
29269553 | 9155 | EXPORT_SYMBOL_GPL(md_do_sync); |
1da177e4 | 9156 | |
746d3207 N |
9157 | static int remove_and_add_spares(struct mddev *mddev, |
9158 | struct md_rdev *this) | |
b4c4c7b8 | 9159 | { |
3cb03002 | 9160 | struct md_rdev *rdev; |
b4c4c7b8 | 9161 | int spares = 0; |
f2a371c5 | 9162 | int removed = 0; |
d787be40 | 9163 | bool remove_some = false; |
b4c4c7b8 | 9164 | |
39772f0a N |
9165 | if (this && test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
9166 | /* Mustn't remove devices when resync thread is running */ | |
9167 | return 0; | |
9168 | ||
d787be40 N |
9169 | rdev_for_each(rdev, mddev) { |
9170 | if ((this == NULL || rdev == this) && | |
9171 | rdev->raid_disk >= 0 && | |
9172 | !test_bit(Blocked, &rdev->flags) && | |
9173 | test_bit(Faulty, &rdev->flags) && | |
9174 | atomic_read(&rdev->nr_pending)==0) { | |
9175 | /* Faulty non-Blocked devices with nr_pending == 0 | |
9176 | * never get nr_pending incremented, | |
9177 | * never get Faulty cleared, and never get Blocked set. | |
9178 | * So we can synchronize_rcu now rather than once per device | |
9179 | */ | |
9180 | remove_some = true; | |
9181 | set_bit(RemoveSynchronized, &rdev->flags); | |
9182 | } | |
9183 | } | |
9184 | ||
9185 | if (remove_some) | |
9186 | synchronize_rcu(); | |
9187 | rdev_for_each(rdev, mddev) { | |
746d3207 N |
9188 | if ((this == NULL || rdev == this) && |
9189 | rdev->raid_disk >= 0 && | |
6bfe0b49 | 9190 | !test_bit(Blocked, &rdev->flags) && |
d787be40 | 9191 | ((test_bit(RemoveSynchronized, &rdev->flags) || |
f2076e7d SL |
9192 | (!test_bit(In_sync, &rdev->flags) && |
9193 | !test_bit(Journal, &rdev->flags))) && | |
d787be40 | 9194 | atomic_read(&rdev->nr_pending)==0)) { |
b4c4c7b8 | 9195 | if (mddev->pers->hot_remove_disk( |
b8321b68 | 9196 | mddev, rdev) == 0) { |
36fad858 | 9197 | sysfs_unlink_rdev(mddev, rdev); |
011abdc9 | 9198 | rdev->saved_raid_disk = rdev->raid_disk; |
b4c4c7b8 | 9199 | rdev->raid_disk = -1; |
f2a371c5 | 9200 | removed++; |
b4c4c7b8 N |
9201 | } |
9202 | } | |
d787be40 N |
9203 | if (remove_some && test_bit(RemoveSynchronized, &rdev->flags)) |
9204 | clear_bit(RemoveSynchronized, &rdev->flags); | |
9205 | } | |
9206 | ||
90584fc9 | 9207 | if (removed && mddev->kobj.sd) |
e1a86dbb | 9208 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
b4c4c7b8 | 9209 | |
2910ff17 | 9210 | if (this && removed) |
746d3207 N |
9211 | goto no_add; |
9212 | ||
dafb20fa | 9213 | rdev_for_each(rdev, mddev) { |
2910ff17 GR |
9214 | if (this && this != rdev) |
9215 | continue; | |
dbb64f86 GR |
9216 | if (test_bit(Candidate, &rdev->flags)) |
9217 | continue; | |
7bfec5f3 N |
9218 | if (rdev->raid_disk >= 0 && |
9219 | !test_bit(In_sync, &rdev->flags) && | |
f2076e7d | 9220 | !test_bit(Journal, &rdev->flags) && |
7bfec5f3 N |
9221 | !test_bit(Faulty, &rdev->flags)) |
9222 | spares++; | |
7ceb17e8 N |
9223 | if (rdev->raid_disk >= 0) |
9224 | continue; | |
9225 | if (test_bit(Faulty, &rdev->flags)) | |
9226 | continue; | |
f6b6ec5c | 9227 | if (!test_bit(Journal, &rdev->flags)) { |
f97a5528 YB |
9228 | if (!md_is_rdwr(mddev) && |
9229 | !(rdev->saved_raid_disk >= 0 && | |
9230 | !test_bit(Bitmap_sync, &rdev->flags))) | |
f6b6ec5c | 9231 | continue; |
7ceb17e8 | 9232 | |
f6b6ec5c SL |
9233 | rdev->recovery_offset = 0; |
9234 | } | |
3f79cc22 | 9235 | if (mddev->pers->hot_add_disk(mddev, rdev) == 0) { |
5e3b8a8d DLM |
9236 | /* failure here is OK */ |
9237 | sysfs_link_rdev(mddev, rdev); | |
f6b6ec5c SL |
9238 | if (!test_bit(Journal, &rdev->flags)) |
9239 | spares++; | |
54679486 | 9240 | md_new_event(); |
2953079c | 9241 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
dfc70645 | 9242 | } |
b4c4c7b8 | 9243 | } |
746d3207 | 9244 | no_add: |
6dafab6b | 9245 | if (removed) |
2953079c | 9246 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
b4c4c7b8 N |
9247 | return spares; |
9248 | } | |
7ebc0be7 | 9249 | |
ac05f256 N |
9250 | static void md_start_sync(struct work_struct *ws) |
9251 | { | |
9252 | struct mddev *mddev = container_of(ws, struct mddev, del_work); | |
c186b128 | 9253 | |
44693154 YK |
9254 | rcu_assign_pointer(mddev->sync_thread, |
9255 | md_register_thread(md_do_sync, mddev, "resync")); | |
ac05f256 | 9256 | if (!mddev->sync_thread) { |
9d48739e N |
9257 | pr_warn("%s: could not start resync thread...\n", |
9258 | mdname(mddev)); | |
ac05f256 N |
9259 | /* leave the spares where they are, it shouldn't hurt */ |
9260 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
9261 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9262 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9263 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
9264 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 9265 | wake_up(&resync_wait); |
ac05f256 N |
9266 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
9267 | &mddev->recovery)) | |
9268 | if (mddev->sysfs_action) | |
9269 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9270 | } else | |
9271 | md_wakeup_thread(mddev->sync_thread); | |
9272 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
54679486 | 9273 | md_new_event(); |
ac05f256 N |
9274 | } |
9275 | ||
1da177e4 LT |
9276 | /* |
9277 | * This routine is regularly called by all per-raid-array threads to | |
9278 | * deal with generic issues like resync and super-block update. | |
9279 | * Raid personalities that don't have a thread (linear/raid0) do not | |
9280 | * need this as they never do any recovery or update the superblock. | |
9281 | * | |
9282 | * It does not do any resync itself, but rather "forks" off other threads | |
9283 | * to do that as needed. | |
9284 | * When it is determined that resync is needed, we set MD_RECOVERY_RUNNING in | |
9285 | * "->recovery" and create a thread at ->sync_thread. | |
dfc70645 | 9286 | * When the thread finishes it sets MD_RECOVERY_DONE |
1da177e4 LT |
9287 | * and wakeups up this thread which will reap the thread and finish up. |
9288 | * This thread also removes any faulty devices (with nr_pending == 0). | |
9289 | * | |
9290 | * The overall approach is: | |
9291 | * 1/ if the superblock needs updating, update it. | |
9292 | * 2/ If a recovery thread is running, don't do anything else. | |
9293 | * 3/ If recovery has finished, clean up, possibly marking spares active. | |
9294 | * 4/ If there are any faulty devices, remove them. | |
9295 | * 5/ If array is degraded, try to add spares devices | |
9296 | * 6/ If array has spares or is not in-sync, start a resync thread. | |
9297 | */ | |
fd01b88c | 9298 | void md_check_recovery(struct mddev *mddev) |
1da177e4 | 9299 | { |
059421e0 N |
9300 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags) && mddev->sb_flags) { |
9301 | /* Write superblock - thread that called mddev_suspend() | |
9302 | * holds reconfig_mutex for us. | |
9303 | */ | |
9304 | set_bit(MD_UPDATING_SB, &mddev->flags); | |
9305 | smp_mb__after_atomic(); | |
9306 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags)) | |
9307 | md_update_sb(mddev, 0); | |
9308 | clear_bit_unlock(MD_UPDATING_SB, &mddev->flags); | |
9309 | wake_up(&mddev->sb_wait); | |
9310 | } | |
9311 | ||
d1932913 | 9312 | if (is_md_suspended(mddev)) |
68866e42 JB |
9313 | return; |
9314 | ||
5f40402d | 9315 | if (mddev->bitmap) |
e64e4018 | 9316 | md_bitmap_daemon_work(mddev); |
1da177e4 | 9317 | |
fca4d848 | 9318 | if (signal_pending(current)) { |
31a59e34 | 9319 | if (mddev->pers->sync_request && !mddev->external) { |
9d48739e N |
9320 | pr_debug("md: %s in immediate safe mode\n", |
9321 | mdname(mddev)); | |
fca4d848 N |
9322 | mddev->safemode = 2; |
9323 | } | |
9324 | flush_signals(current); | |
9325 | } | |
9326 | ||
f97a5528 YB |
9327 | if (!md_is_rdwr(mddev) && |
9328 | !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) | |
c89a8eee | 9329 | return; |
1da177e4 | 9330 | if ( ! ( |
2953079c | 9331 | (mddev->sb_flags & ~ (1<<MD_SB_CHANGE_PENDING)) || |
1da177e4 | 9332 | test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
fca4d848 | 9333 | test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
31a59e34 | 9334 | (mddev->external == 0 && mddev->safemode == 1) || |
4ad23a97 | 9335 | (mddev->safemode == 2 |
fca4d848 | 9336 | && !mddev->in_sync && mddev->recovery_cp == MaxSector) |
1da177e4 LT |
9337 | )) |
9338 | return; | |
fca4d848 | 9339 | |
df5b89b3 | 9340 | if (mddev_trylock(mddev)) { |
b4c4c7b8 | 9341 | int spares = 0; |
480523fe | 9342 | bool try_set_sync = mddev->safemode != 0; |
fca4d848 | 9343 | |
afc1f55c | 9344 | if (!mddev->external && mddev->safemode == 1) |
33182d15 N |
9345 | mddev->safemode = 0; |
9346 | ||
f97a5528 | 9347 | if (!md_is_rdwr(mddev)) { |
ab16bfc7 NB |
9348 | struct md_rdev *rdev; |
9349 | if (!mddev->external && mddev->in_sync) | |
9350 | /* 'Blocked' flag not needed as failed devices | |
9351 | * will be recorded if array switched to read/write. | |
9352 | * Leaving it set will prevent the device | |
9353 | * from being removed. | |
9354 | */ | |
9355 | rdev_for_each(rdev, mddev) | |
9356 | clear_bit(Blocked, &rdev->flags); | |
7ceb17e8 N |
9357 | /* On a read-only array we can: |
9358 | * - remove failed devices | |
9359 | * - add already-in_sync devices if the array itself | |
9360 | * is in-sync. | |
9361 | * As we only add devices that are already in-sync, | |
9362 | * we can activate the spares immediately. | |
c89a8eee | 9363 | */ |
7ceb17e8 | 9364 | remove_and_add_spares(mddev, NULL); |
8313b8e5 N |
9365 | /* There is no thread, but we need to call |
9366 | * ->spare_active and clear saved_raid_disk | |
9367 | */ | |
2ac295a5 | 9368 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
d0a18034 | 9369 | md_reap_sync_thread(mddev); |
a4a3d26d | 9370 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
8313b8e5 | 9371 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
2953079c | 9372 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
c89a8eee N |
9373 | goto unlock; |
9374 | } | |
9375 | ||
659b254f | 9376 | if (mddev_is_clustered(mddev)) { |
f7c7a2f9 | 9377 | struct md_rdev *rdev, *tmp; |
659b254f GJ |
9378 | /* kick the device if another node issued a |
9379 | * remove disk. | |
9380 | */ | |
f7c7a2f9 | 9381 | rdev_for_each_safe(rdev, tmp, mddev) { |
659b254f GJ |
9382 | if (test_and_clear_bit(ClusterRemove, &rdev->flags) && |
9383 | rdev->raid_disk < 0) | |
9384 | md_kick_rdev_from_array(rdev); | |
9385 | } | |
9386 | } | |
9387 | ||
480523fe | 9388 | if (try_set_sync && !mddev->external && !mddev->in_sync) { |
85572d7c | 9389 | spin_lock(&mddev->lock); |
6497709b | 9390 | set_in_sync(mddev); |
85572d7c | 9391 | spin_unlock(&mddev->lock); |
fca4d848 | 9392 | } |
fca4d848 | 9393 | |
2953079c | 9394 | if (mddev->sb_flags) |
850b2b42 | 9395 | md_update_sb(mddev, 0); |
06d91a5f | 9396 | |
f71209b1 YK |
9397 | /* |
9398 | * Never start a new sync thread if MD_RECOVERY_RUNNING is | |
9399 | * still set. | |
9400 | */ | |
9401 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { | |
9402 | if (!test_bit(MD_RECOVERY_DONE, &mddev->recovery)) { | |
9403 | /* resync/recovery still happening */ | |
9404 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9405 | goto unlock; | |
9406 | } | |
9407 | ||
9408 | if (WARN_ON_ONCE(!mddev->sync_thread)) | |
9409 | goto unlock; | |
9410 | ||
d0a18034 | 9411 | md_reap_sync_thread(mddev); |
1da177e4 LT |
9412 | goto unlock; |
9413 | } | |
f71209b1 | 9414 | |
72a23c21 NB |
9415 | /* Set RUNNING before clearing NEEDED to avoid |
9416 | * any transients in the value of "sync_action". | |
9417 | */ | |
72f36d59 | 9418 | mddev->curr_resync_completed = 0; |
23da422b | 9419 | spin_lock(&mddev->lock); |
72a23c21 | 9420 | set_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
23da422b | 9421 | spin_unlock(&mddev->lock); |
24dd469d N |
9422 | /* Clear some bits that don't mean anything, but |
9423 | * might be left set | |
9424 | */ | |
24dd469d N |
9425 | clear_bit(MD_RECOVERY_INTR, &mddev->recovery); |
9426 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); | |
1da177e4 | 9427 | |
ed209584 N |
9428 | if (!test_and_clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
9429 | test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) | |
ac05f256 | 9430 | goto not_running; |
1da177e4 LT |
9431 | /* no recovery is running. |
9432 | * remove any failed drives, then | |
9433 | * add spares if possible. | |
72f36d59 | 9434 | * Spares are also removed and re-added, to allow |
1da177e4 LT |
9435 | * the personality to fail the re-add. |
9436 | */ | |
1da177e4 | 9437 | |
b4c4c7b8 | 9438 | if (mddev->reshape_position != MaxSector) { |
50ac168a N |
9439 | if (mddev->pers->check_reshape == NULL || |
9440 | mddev->pers->check_reshape(mddev) != 0) | |
b4c4c7b8 | 9441 | /* Cannot proceed */ |
ac05f256 | 9442 | goto not_running; |
b4c4c7b8 | 9443 | set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); |
72a23c21 | 9444 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
746d3207 | 9445 | } else if ((spares = remove_and_add_spares(mddev, NULL))) { |
24dd469d N |
9446 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9447 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
56ac36d7 | 9448 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
72a23c21 | 9449 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9450 | } else if (mddev->recovery_cp < MaxSector) { |
9451 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
72a23c21 | 9452 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9453 | } else if (!test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) |
9454 | /* nothing to be done ... */ | |
ac05f256 | 9455 | goto not_running; |
24dd469d | 9456 | |
1da177e4 | 9457 | if (mddev->pers->sync_request) { |
ef99bf48 | 9458 | if (spares) { |
a654b9d8 N |
9459 | /* We are adding a device or devices to an array |
9460 | * which has the bitmap stored on all devices. | |
9461 | * So make sure all bitmap pages get written | |
9462 | */ | |
e64e4018 | 9463 | md_bitmap_write_all(mddev->bitmap); |
a654b9d8 | 9464 | } |
ac05f256 N |
9465 | INIT_WORK(&mddev->del_work, md_start_sync); |
9466 | queue_work(md_misc_wq, &mddev->del_work); | |
9467 | goto unlock; | |
1da177e4 | 9468 | } |
ac05f256 | 9469 | not_running: |
72a23c21 NB |
9470 | if (!mddev->sync_thread) { |
9471 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 9472 | wake_up(&resync_wait); |
72a23c21 NB |
9473 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
9474 | &mddev->recovery)) | |
0c3573f1 | 9475 | if (mddev->sysfs_action) |
00bcb4ac | 9476 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
72a23c21 | 9477 | } |
ac05f256 N |
9478 | unlock: |
9479 | wake_up(&mddev->sb_wait); | |
1da177e4 LT |
9480 | mddev_unlock(mddev); |
9481 | } | |
9482 | } | |
6c144d31 | 9483 | EXPORT_SYMBOL(md_check_recovery); |
1da177e4 | 9484 | |
d0a18034 | 9485 | void md_reap_sync_thread(struct mddev *mddev) |
a91d5ac0 JB |
9486 | { |
9487 | struct md_rdev *rdev; | |
aefb2e5f GJ |
9488 | sector_t old_dev_sectors = mddev->dev_sectors; |
9489 | bool is_reshaped = false; | |
a91d5ac0 | 9490 | |
a865b96c | 9491 | /* resync has finished, collect result */ |
7eb8ff02 | 9492 | md_unregister_thread(mddev, &mddev->sync_thread); |
130443d6 YK |
9493 | atomic_inc(&mddev->sync_seq); |
9494 | ||
a91d5ac0 | 9495 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
0d8ed0e9 GJ |
9496 | !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery) && |
9497 | mddev->degraded != mddev->raid_disks) { | |
a91d5ac0 JB |
9498 | /* success...*/ |
9499 | /* activate any spares */ | |
9500 | if (mddev->pers->spare_active(mddev)) { | |
e1a86dbb | 9501 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
2953079c | 9502 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a91d5ac0 JB |
9503 | } |
9504 | } | |
9505 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
aefb2e5f | 9506 | mddev->pers->finish_reshape) { |
a91d5ac0 | 9507 | mddev->pers->finish_reshape(mddev); |
aefb2e5f GJ |
9508 | if (mddev_is_clustered(mddev)) |
9509 | is_reshaped = true; | |
9510 | } | |
a91d5ac0 JB |
9511 | |
9512 | /* If array is no-longer degraded, then any saved_raid_disk | |
f466722c | 9513 | * information must be scrapped. |
a91d5ac0 | 9514 | */ |
f466722c N |
9515 | if (!mddev->degraded) |
9516 | rdev_for_each(rdev, mddev) | |
a91d5ac0 JB |
9517 | rdev->saved_raid_disk = -1; |
9518 | ||
9519 | md_update_sb(mddev, 1); | |
2953079c | 9520 | /* MD_SB_CHANGE_PENDING should be cleared by md_update_sb, so we can |
bb8bf15b GJ |
9521 | * call resync_finish here if MD_CLUSTER_RESYNC_LOCKED is set by |
9522 | * clustered raid */ | |
9523 | if (test_and_clear_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags)) | |
9524 | md_cluster_ops->resync_finish(mddev); | |
a91d5ac0 | 9525 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
ea358cd0 | 9526 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); |
a91d5ac0 JB |
9527 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9528 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9529 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9530 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
aefb2e5f GJ |
9531 | /* |
9532 | * We call md_cluster_ops->update_size here because sync_size could | |
9533 | * be changed by md_update_sb, and MD_RECOVERY_RESHAPE is cleared, | |
9534 | * so it is time to update size across cluster. | |
9535 | */ | |
9536 | if (mddev_is_clustered(mddev) && is_reshaped | |
9537 | && !test_bit(MD_CLOSING, &mddev->flags)) | |
9538 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
a91d5ac0 JB |
9539 | /* flag recovery needed just to double check */ |
9540 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9973f0fa | 9541 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
a91d5ac0 | 9542 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
54679486 | 9543 | md_new_event(); |
a91d5ac0 JB |
9544 | if (mddev->event_work.func) |
9545 | queue_work(md_misc_wq, &mddev->event_work); | |
753260ed | 9546 | wake_up(&resync_wait); |
a91d5ac0 | 9547 | } |
6c144d31 | 9548 | EXPORT_SYMBOL(md_reap_sync_thread); |
a91d5ac0 | 9549 | |
fd01b88c | 9550 | void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev) |
6bfe0b49 | 9551 | { |
00bcb4ac | 9552 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
6bfe0b49 | 9553 | wait_event_timeout(rdev->blocked_wait, |
de393cde N |
9554 | !test_bit(Blocked, &rdev->flags) && |
9555 | !test_bit(BlockedBadBlocks, &rdev->flags), | |
6bfe0b49 DW |
9556 | msecs_to_jiffies(5000)); |
9557 | rdev_dec_pending(rdev, mddev); | |
9558 | } | |
9559 | EXPORT_SYMBOL(md_wait_for_blocked_rdev); | |
9560 | ||
c6563a8c N |
9561 | void md_finish_reshape(struct mddev *mddev) |
9562 | { | |
9563 | /* called be personality module when reshape completes. */ | |
9564 | struct md_rdev *rdev; | |
9565 | ||
9566 | rdev_for_each(rdev, mddev) { | |
9567 | if (rdev->data_offset > rdev->new_data_offset) | |
9568 | rdev->sectors += rdev->data_offset - rdev->new_data_offset; | |
9569 | else | |
9570 | rdev->sectors -= rdev->new_data_offset - rdev->data_offset; | |
9571 | rdev->data_offset = rdev->new_data_offset; | |
9572 | } | |
9573 | } | |
9574 | EXPORT_SYMBOL(md_finish_reshape); | |
2230dfe4 | 9575 | |
fc974ee2 | 9576 | /* Bad block management */ |
2230dfe4 | 9577 | |
fc974ee2 | 9578 | /* Returns 1 on success, 0 on failure */ |
3cb03002 | 9579 | int rdev_set_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
c6563a8c | 9580 | int is_new) |
2230dfe4 | 9581 | { |
85ad1d13 | 9582 | struct mddev *mddev = rdev->mddev; |
c6563a8c N |
9583 | int rv; |
9584 | if (is_new) | |
9585 | s += rdev->new_data_offset; | |
9586 | else | |
9587 | s += rdev->data_offset; | |
fc974ee2 VV |
9588 | rv = badblocks_set(&rdev->badblocks, s, sectors, 0); |
9589 | if (rv == 0) { | |
2230dfe4 | 9590 | /* Make sure they get written out promptly */ |
35b785f7 | 9591 | if (test_bit(ExternalBbl, &rdev->flags)) |
e1a86dbb | 9592 | sysfs_notify_dirent_safe(rdev->sysfs_unack_badblocks); |
8bd2f0a0 | 9593 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
2953079c SL |
9594 | set_mask_bits(&mddev->sb_flags, 0, |
9595 | BIT(MD_SB_CHANGE_CLEAN) | BIT(MD_SB_CHANGE_PENDING)); | |
2230dfe4 | 9596 | md_wakeup_thread(rdev->mddev->thread); |
fc974ee2 VV |
9597 | return 1; |
9598 | } else | |
9599 | return 0; | |
2230dfe4 N |
9600 | } |
9601 | EXPORT_SYMBOL_GPL(rdev_set_badblocks); | |
9602 | ||
c6563a8c N |
9603 | int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
9604 | int is_new) | |
2230dfe4 | 9605 | { |
35b785f7 | 9606 | int rv; |
c6563a8c N |
9607 | if (is_new) |
9608 | s += rdev->new_data_offset; | |
9609 | else | |
9610 | s += rdev->data_offset; | |
35b785f7 TM |
9611 | rv = badblocks_clear(&rdev->badblocks, s, sectors); |
9612 | if ((rv == 0) && test_bit(ExternalBbl, &rdev->flags)) | |
e1a86dbb | 9613 | sysfs_notify_dirent_safe(rdev->sysfs_badblocks); |
35b785f7 | 9614 | return rv; |
2230dfe4 N |
9615 | } |
9616 | EXPORT_SYMBOL_GPL(rdev_clear_badblocks); | |
9617 | ||
75c96f85 AB |
9618 | static int md_notify_reboot(struct notifier_block *this, |
9619 | unsigned long code, void *x) | |
1da177e4 | 9620 | { |
f2651434 | 9621 | struct mddev *mddev, *n; |
2dba6a91 | 9622 | int need_delay = 0; |
1da177e4 | 9623 | |
f2651434 CH |
9624 | spin_lock(&all_mddevs_lock); |
9625 | list_for_each_entry_safe(mddev, n, &all_mddevs, all_mddevs) { | |
12a6caf2 CH |
9626 | if (!mddev_get(mddev)) |
9627 | continue; | |
f2651434 | 9628 | spin_unlock(&all_mddevs_lock); |
c744a65c | 9629 | if (mddev_trylock(mddev)) { |
30b8aa91 N |
9630 | if (mddev->pers) |
9631 | __md_stop_writes(mddev); | |
0f62fb22 N |
9632 | if (mddev->persistent) |
9633 | mddev->safemode = 2; | |
c744a65c | 9634 | mddev_unlock(mddev); |
2dba6a91 | 9635 | } |
c744a65c | 9636 | need_delay = 1; |
f2651434 CH |
9637 | mddev_put(mddev); |
9638 | spin_lock(&all_mddevs_lock); | |
1da177e4 | 9639 | } |
f2651434 CH |
9640 | spin_unlock(&all_mddevs_lock); |
9641 | ||
c744a65c N |
9642 | /* |
9643 | * certain more exotic SCSI devices are known to be | |
9644 | * volatile wrt too early system reboots. While the | |
9645 | * right place to handle this issue is the given | |
9646 | * driver, we do want to have a safe RAID driver ... | |
9647 | */ | |
9648 | if (need_delay) | |
7d959f6e | 9649 | msleep(1000); |
c744a65c | 9650 | |
1da177e4 LT |
9651 | return NOTIFY_DONE; |
9652 | } | |
9653 | ||
75c96f85 | 9654 | static struct notifier_block md_notifier = { |
1da177e4 LT |
9655 | .notifier_call = md_notify_reboot, |
9656 | .next = NULL, | |
9657 | .priority = INT_MAX, /* before any real devices */ | |
9658 | }; | |
9659 | ||
9660 | static void md_geninit(void) | |
9661 | { | |
36a4e1fe | 9662 | pr_debug("md: sizeof(mdp_super_t) = %d\n", (int)sizeof(mdp_super_t)); |
1da177e4 | 9663 | |
97a32539 | 9664 | proc_create("mdstat", S_IRUGO, NULL, &mdstat_proc_ops); |
1da177e4 LT |
9665 | } |
9666 | ||
75c96f85 | 9667 | static int __init md_init(void) |
1da177e4 | 9668 | { |
e804ac78 TH |
9669 | int ret = -ENOMEM; |
9670 | ||
ada609ee | 9671 | md_wq = alloc_workqueue("md", WQ_MEM_RECLAIM, 0); |
e804ac78 TH |
9672 | if (!md_wq) |
9673 | goto err_wq; | |
9674 | ||
9675 | md_misc_wq = alloc_workqueue("md_misc", 0, 0); | |
9676 | if (!md_misc_wq) | |
9677 | goto err_misc_wq; | |
9678 | ||
a022325a YK |
9679 | md_bitmap_wq = alloc_workqueue("md_bitmap", WQ_MEM_RECLAIM | WQ_UNBOUND, |
9680 | 0); | |
9681 | if (!md_bitmap_wq) | |
9682 | goto err_bitmap_wq; | |
9683 | ||
28144f99 CH |
9684 | ret = __register_blkdev(MD_MAJOR, "md", md_probe); |
9685 | if (ret < 0) | |
e804ac78 TH |
9686 | goto err_md; |
9687 | ||
28144f99 CH |
9688 | ret = __register_blkdev(0, "mdp", md_probe); |
9689 | if (ret < 0) | |
e804ac78 TH |
9690 | goto err_mdp; |
9691 | mdp_major = ret; | |
9692 | ||
1da177e4 | 9693 | register_reboot_notifier(&md_notifier); |
9adcf9d3 | 9694 | raid_table_header = register_sysctl("dev/raid", raid_table); |
1da177e4 LT |
9695 | |
9696 | md_geninit(); | |
d710e138 | 9697 | return 0; |
1da177e4 | 9698 | |
e804ac78 TH |
9699 | err_mdp: |
9700 | unregister_blkdev(MD_MAJOR, "md"); | |
9701 | err_md: | |
a022325a YK |
9702 | destroy_workqueue(md_bitmap_wq); |
9703 | err_bitmap_wq: | |
e804ac78 TH |
9704 | destroy_workqueue(md_misc_wq); |
9705 | err_misc_wq: | |
9706 | destroy_workqueue(md_wq); | |
9707 | err_wq: | |
9708 | return ret; | |
9709 | } | |
1da177e4 | 9710 | |
70bcecdb | 9711 | static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev) |
1d7e3e96 | 9712 | { |
70bcecdb | 9713 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
f7c7a2f9 | 9714 | struct md_rdev *rdev2, *tmp; |
70bcecdb | 9715 | int role, ret; |
1d7e3e96 | 9716 | |
818da59f GJ |
9717 | /* |
9718 | * If size is changed in another node then we need to | |
9719 | * do resize as well. | |
9720 | */ | |
9721 | if (mddev->dev_sectors != le64_to_cpu(sb->size)) { | |
9722 | ret = mddev->pers->resize(mddev, le64_to_cpu(sb->size)); | |
9723 | if (ret) | |
9724 | pr_info("md-cluster: resize failed\n"); | |
9725 | else | |
e64e4018 | 9726 | md_bitmap_update_sb(mddev->bitmap); |
818da59f GJ |
9727 | } |
9728 | ||
70bcecdb | 9729 | /* Check for change of roles in the active devices */ |
f7c7a2f9 | 9730 | rdev_for_each_safe(rdev2, tmp, mddev) { |
70bcecdb GR |
9731 | if (test_bit(Faulty, &rdev2->flags)) |
9732 | continue; | |
9733 | ||
9734 | /* Check if the roles changed */ | |
9735 | role = le16_to_cpu(sb->dev_roles[rdev2->desc_nr]); | |
dbb64f86 GR |
9736 | |
9737 | if (test_bit(Candidate, &rdev2->flags)) { | |
9151ad5d | 9738 | if (role == MD_DISK_ROLE_FAULTY) { |
913cce5a CH |
9739 | pr_info("md: Removing Candidate device %pg because add failed\n", |
9740 | rdev2->bdev); | |
dbb64f86 GR |
9741 | md_kick_rdev_from_array(rdev2); |
9742 | continue; | |
9743 | } | |
9744 | else | |
9745 | clear_bit(Candidate, &rdev2->flags); | |
9746 | } | |
9747 | ||
70bcecdb | 9748 | if (role != rdev2->raid_disk) { |
ca1e98e0 GJ |
9749 | /* |
9750 | * got activated except reshape is happening. | |
9751 | */ | |
9151ad5d | 9752 | if (rdev2->raid_disk == -1 && role != MD_DISK_ROLE_SPARE && |
ca1e98e0 GJ |
9753 | !(le32_to_cpu(sb->feature_map) & |
9754 | MD_FEATURE_RESHAPE_ACTIVE)) { | |
70bcecdb GR |
9755 | rdev2->saved_raid_disk = role; |
9756 | ret = remove_and_add_spares(mddev, rdev2); | |
913cce5a CH |
9757 | pr_info("Activated spare: %pg\n", |
9758 | rdev2->bdev); | |
a578183e GJ |
9759 | /* wakeup mddev->thread here, so array could |
9760 | * perform resync with the new activated disk */ | |
9761 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9762 | md_wakeup_thread(mddev->thread); | |
70bcecdb GR |
9763 | } |
9764 | /* device faulty | |
9765 | * We just want to do the minimum to mark the disk | |
9766 | * as faulty. The recovery is performed by the | |
9767 | * one who initiated the error. | |
9768 | */ | |
9151ad5d DS |
9769 | if (role == MD_DISK_ROLE_FAULTY || |
9770 | role == MD_DISK_ROLE_JOURNAL) { | |
70bcecdb GR |
9771 | md_error(mddev, rdev2); |
9772 | clear_bit(Blocked, &rdev2->flags); | |
9773 | } | |
9774 | } | |
1d7e3e96 | 9775 | } |
70bcecdb | 9776 | |
a8da01f7 ZH |
9777 | if (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) { |
9778 | ret = update_raid_disks(mddev, le32_to_cpu(sb->raid_disks)); | |
9779 | if (ret) | |
9780 | pr_warn("md: updating array disks failed. %d\n", ret); | |
9781 | } | |
70bcecdb | 9782 | |
7564beda GJ |
9783 | /* |
9784 | * Since mddev->delta_disks has already updated in update_raid_disks, | |
9785 | * so it is time to check reshape. | |
9786 | */ | |
9787 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9788 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9789 | /* | |
9790 | * reshape is happening in the remote node, we need to | |
9791 | * update reshape_position and call start_reshape. | |
9792 | */ | |
ed4d0a4e | 9793 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); |
7564beda GJ |
9794 | if (mddev->pers->update_reshape_pos) |
9795 | mddev->pers->update_reshape_pos(mddev); | |
9796 | if (mddev->pers->start_reshape) | |
9797 | mddev->pers->start_reshape(mddev); | |
9798 | } else if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9799 | mddev->reshape_position != MaxSector && | |
9800 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9801 | /* reshape is just done in another node. */ | |
9802 | mddev->reshape_position = MaxSector; | |
9803 | if (mddev->pers->update_reshape_pos) | |
9804 | mddev->pers->update_reshape_pos(mddev); | |
9805 | } | |
9806 | ||
70bcecdb GR |
9807 | /* Finally set the event to be up to date */ |
9808 | mddev->events = le64_to_cpu(sb->events); | |
9809 | } | |
9810 | ||
9811 | static int read_rdev(struct mddev *mddev, struct md_rdev *rdev) | |
9812 | { | |
9813 | int err; | |
9814 | struct page *swapout = rdev->sb_page; | |
9815 | struct mdp_superblock_1 *sb; | |
9816 | ||
9817 | /* Store the sb page of the rdev in the swapout temporary | |
9818 | * variable in case we err in the future | |
9819 | */ | |
9820 | rdev->sb_page = NULL; | |
7f0f0d87 N |
9821 | err = alloc_disk_sb(rdev); |
9822 | if (err == 0) { | |
9823 | ClearPageUptodate(rdev->sb_page); | |
9824 | rdev->sb_loaded = 0; | |
9825 | err = super_types[mddev->major_version]. | |
9826 | load_super(rdev, NULL, mddev->minor_version); | |
9827 | } | |
70bcecdb GR |
9828 | if (err < 0) { |
9829 | pr_warn("%s: %d Could not reload rdev(%d) err: %d. Restoring old values\n", | |
9830 | __func__, __LINE__, rdev->desc_nr, err); | |
7f0f0d87 N |
9831 | if (rdev->sb_page) |
9832 | put_page(rdev->sb_page); | |
70bcecdb GR |
9833 | rdev->sb_page = swapout; |
9834 | rdev->sb_loaded = 1; | |
9835 | return err; | |
1d7e3e96 GR |
9836 | } |
9837 | ||
70bcecdb GR |
9838 | sb = page_address(rdev->sb_page); |
9839 | /* Read the offset unconditionally, even if MD_FEATURE_RECOVERY_OFFSET | |
9840 | * is not set | |
9841 | */ | |
9842 | ||
9843 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)) | |
9844 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); | |
9845 | ||
9846 | /* The other node finished recovery, call spare_active to set | |
9847 | * device In_sync and mddev->degraded | |
9848 | */ | |
9849 | if (rdev->recovery_offset == MaxSector && | |
9850 | !test_bit(In_sync, &rdev->flags) && | |
9851 | mddev->pers->spare_active(mddev)) | |
e1a86dbb | 9852 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
70bcecdb GR |
9853 | |
9854 | put_page(swapout); | |
9855 | return 0; | |
9856 | } | |
9857 | ||
9858 | void md_reload_sb(struct mddev *mddev, int nr) | |
9859 | { | |
64c54d92 | 9860 | struct md_rdev *rdev = NULL, *iter; |
70bcecdb GR |
9861 | int err; |
9862 | ||
9863 | /* Find the rdev */ | |
64c54d92 XT |
9864 | rdev_for_each_rcu(iter, mddev) { |
9865 | if (iter->desc_nr == nr) { | |
9866 | rdev = iter; | |
70bcecdb | 9867 | break; |
64c54d92 | 9868 | } |
70bcecdb GR |
9869 | } |
9870 | ||
64c54d92 | 9871 | if (!rdev) { |
70bcecdb GR |
9872 | pr_warn("%s: %d Could not find rdev with nr %d\n", __func__, __LINE__, nr); |
9873 | return; | |
9874 | } | |
9875 | ||
9876 | err = read_rdev(mddev, rdev); | |
9877 | if (err < 0) | |
9878 | return; | |
9879 | ||
9880 | check_sb_changes(mddev, rdev); | |
9881 | ||
9882 | /* Read all rdev's to update recovery_offset */ | |
0ea9924a GJ |
9883 | rdev_for_each_rcu(rdev, mddev) { |
9884 | if (!test_bit(Faulty, &rdev->flags)) | |
9885 | read_rdev(mddev, rdev); | |
9886 | } | |
1d7e3e96 GR |
9887 | } |
9888 | EXPORT_SYMBOL(md_reload_sb); | |
9889 | ||
1da177e4 LT |
9890 | #ifndef MODULE |
9891 | ||
9892 | /* | |
9893 | * Searches all registered partitions for autorun RAID arrays | |
9894 | * at boot time. | |
9895 | */ | |
4d936ec1 | 9896 | |
5b1f5bc3 | 9897 | static DEFINE_MUTEX(detected_devices_mutex); |
4d936ec1 ME |
9898 | static LIST_HEAD(all_detected_devices); |
9899 | struct detected_devices_node { | |
9900 | struct list_head list; | |
9901 | dev_t dev; | |
9902 | }; | |
1da177e4 LT |
9903 | |
9904 | void md_autodetect_dev(dev_t dev) | |
9905 | { | |
4d936ec1 ME |
9906 | struct detected_devices_node *node_detected_dev; |
9907 | ||
9908 | node_detected_dev = kzalloc(sizeof(*node_detected_dev), GFP_KERNEL); | |
9909 | if (node_detected_dev) { | |
9910 | node_detected_dev->dev = dev; | |
5b1f5bc3 | 9911 | mutex_lock(&detected_devices_mutex); |
4d936ec1 | 9912 | list_add_tail(&node_detected_dev->list, &all_detected_devices); |
5b1f5bc3 | 9913 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9914 | } |
1da177e4 LT |
9915 | } |
9916 | ||
d82fa81c | 9917 | void md_autostart_arrays(int part) |
1da177e4 | 9918 | { |
3cb03002 | 9919 | struct md_rdev *rdev; |
4d936ec1 ME |
9920 | struct detected_devices_node *node_detected_dev; |
9921 | dev_t dev; | |
9922 | int i_scanned, i_passed; | |
1da177e4 | 9923 | |
4d936ec1 ME |
9924 | i_scanned = 0; |
9925 | i_passed = 0; | |
1da177e4 | 9926 | |
9d48739e | 9927 | pr_info("md: Autodetecting RAID arrays.\n"); |
1da177e4 | 9928 | |
5b1f5bc3 | 9929 | mutex_lock(&detected_devices_mutex); |
4d936ec1 ME |
9930 | while (!list_empty(&all_detected_devices) && i_scanned < INT_MAX) { |
9931 | i_scanned++; | |
9932 | node_detected_dev = list_entry(all_detected_devices.next, | |
9933 | struct detected_devices_node, list); | |
9934 | list_del(&node_detected_dev->list); | |
9935 | dev = node_detected_dev->dev; | |
9936 | kfree(node_detected_dev); | |
90bcf133 | 9937 | mutex_unlock(&detected_devices_mutex); |
df968c4e | 9938 | rdev = md_import_device(dev,0, 90); |
90bcf133 | 9939 | mutex_lock(&detected_devices_mutex); |
1da177e4 LT |
9940 | if (IS_ERR(rdev)) |
9941 | continue; | |
9942 | ||
403df478 | 9943 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 9944 | continue; |
403df478 | 9945 | |
d0fae18f | 9946 | set_bit(AutoDetected, &rdev->flags); |
1da177e4 | 9947 | list_add(&rdev->same_set, &pending_raid_disks); |
4d936ec1 | 9948 | i_passed++; |
1da177e4 | 9949 | } |
5b1f5bc3 | 9950 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9951 | |
9d48739e | 9952 | pr_debug("md: Scanned %d and added %d devices.\n", i_scanned, i_passed); |
1da177e4 LT |
9953 | |
9954 | autorun_devices(part); | |
9955 | } | |
9956 | ||
fdee8ae4 | 9957 | #endif /* !MODULE */ |
1da177e4 LT |
9958 | |
9959 | static __exit void md_exit(void) | |
9960 | { | |
16648bac | 9961 | struct mddev *mddev, *n; |
e2f23b60 | 9962 | int delay = 1; |
8ab5e4c1 | 9963 | |
3dbd8c2e | 9964 | unregister_blkdev(MD_MAJOR,"md"); |
1da177e4 LT |
9965 | unregister_blkdev(mdp_major, "mdp"); |
9966 | unregister_reboot_notifier(&md_notifier); | |
9967 | unregister_sysctl_table(raid_table_header); | |
e2f23b60 N |
9968 | |
9969 | /* We cannot unload the modules while some process is | |
9970 | * waiting for us in select() or poll() - wake them up | |
9971 | */ | |
9972 | md_unloading = 1; | |
9973 | while (waitqueue_active(&md_event_waiters)) { | |
9974 | /* not safe to leave yet */ | |
9975 | wake_up(&md_event_waiters); | |
9976 | msleep(delay); | |
9977 | delay += delay; | |
9978 | } | |
1da177e4 | 9979 | remove_proc_entry("mdstat", NULL); |
e2f23b60 | 9980 | |
16648bac CH |
9981 | spin_lock(&all_mddevs_lock); |
9982 | list_for_each_entry_safe(mddev, n, &all_mddevs, all_mddevs) { | |
12a6caf2 CH |
9983 | if (!mddev_get(mddev)) |
9984 | continue; | |
16648bac | 9985 | spin_unlock(&all_mddevs_lock); |
1da177e4 | 9986 | export_array(mddev); |
9356863c | 9987 | mddev->ctime = 0; |
d3374825 | 9988 | mddev->hold_active = 0; |
9356863c | 9989 | /* |
16648bac CH |
9990 | * As the mddev is now fully clear, mddev_put will schedule |
9991 | * the mddev for destruction by a workqueue, and the | |
9356863c N |
9992 | * destroy_workqueue() below will wait for that to complete. |
9993 | */ | |
16648bac CH |
9994 | mddev_put(mddev); |
9995 | spin_lock(&all_mddevs_lock); | |
1da177e4 | 9996 | } |
16648bac CH |
9997 | spin_unlock(&all_mddevs_lock); |
9998 | ||
e804ac78 | 9999 | destroy_workqueue(md_misc_wq); |
a022325a | 10000 | destroy_workqueue(md_bitmap_wq); |
e804ac78 | 10001 | destroy_workqueue(md_wq); |
1da177e4 LT |
10002 | } |
10003 | ||
685784aa | 10004 | subsys_initcall(md_init); |
1da177e4 LT |
10005 | module_exit(md_exit) |
10006 | ||
e4dca7b7 | 10007 | static int get_ro(char *buffer, const struct kernel_param *kp) |
f91de92e | 10008 | { |
3f99980c | 10009 | return sprintf(buffer, "%d\n", start_readonly); |
f91de92e | 10010 | } |
e4dca7b7 | 10011 | static int set_ro(const char *val, const struct kernel_param *kp) |
f91de92e | 10012 | { |
4c9309c0 | 10013 | return kstrtouint(val, 10, (unsigned int *)&start_readonly); |
f91de92e N |
10014 | } |
10015 | ||
80ca3a44 N |
10016 | module_param_call(start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR); |
10017 | module_param(start_dirty_degraded, int, S_IRUGO|S_IWUSR); | |
efeb53c0 | 10018 | module_param_call(new_array, add_named_array, NULL, NULL, S_IWUSR); |
78b6350d | 10019 | module_param(create_on_open, bool, S_IRUSR|S_IWUSR); |
f91de92e | 10020 | |
1da177e4 | 10021 | MODULE_LICENSE("GPL"); |
0efb9e61 | 10022 | MODULE_DESCRIPTION("MD RAID framework"); |
aa1595e9 | 10023 | MODULE_ALIAS("md"); |
72008652 | 10024 | MODULE_ALIAS_BLOCKDEV_MAJOR(MD_MAJOR); |