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Commit | Line | Data |
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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> |
fc974ee2 | 44 | #include <linux/badblocks.h> |
1da177e4 | 45 | #include <linux/sysctl.h> |
bff61975 | 46 | #include <linux/seq_file.h> |
ff01bb48 | 47 | #include <linux/fs.h> |
d7603b7e | 48 | #include <linux/poll.h> |
16f17b39 | 49 | #include <linux/ctype.h> |
e7d2860b | 50 | #include <linux/string.h> |
fb4d8c76 N |
51 | #include <linux/hdreg.h> |
52 | #include <linux/proc_fs.h> | |
53 | #include <linux/random.h> | |
056075c7 | 54 | #include <linux/module.h> |
fb4d8c76 | 55 | #include <linux/reboot.h> |
32a7627c | 56 | #include <linux/file.h> |
aa98aa31 | 57 | #include <linux/compat.h> |
25570727 | 58 | #include <linux/delay.h> |
bff61975 N |
59 | #include <linux/raid/md_p.h> |
60 | #include <linux/raid/md_u.h> | |
74cc979c | 61 | #include <linux/raid/detect.h> |
5a0e3ad6 | 62 | #include <linux/slab.h> |
4ad23a97 | 63 | #include <linux/percpu-refcount.h> |
c6a564ff | 64 | #include <linux/part_stat.h> |
4ad23a97 | 65 | |
504634f6 | 66 | #include <trace/events/block.h> |
43b2e5d8 | 67 | #include "md.h" |
935fe098 | 68 | #include "md-bitmap.h" |
edb39c9d | 69 | #include "md-cluster.h" |
1da177e4 | 70 | |
01f96c0a N |
71 | /* pers_list is a list of registered personalities protected |
72 | * by pers_lock. | |
73 | * pers_lock does extra service to protect accesses to | |
74 | * mddev->thread when the mutex cannot be held. | |
75 | */ | |
2604b703 | 76 | static LIST_HEAD(pers_list); |
1da177e4 LT |
77 | static DEFINE_SPINLOCK(pers_lock); |
78 | ||
28dec870 KO |
79 | static struct kobj_type md_ktype; |
80 | ||
edb39c9d | 81 | struct md_cluster_operations *md_cluster_ops; |
589a1c49 | 82 | EXPORT_SYMBOL(md_cluster_ops); |
2b598ee5 | 83 | static struct module *md_cluster_mod; |
edb39c9d | 84 | |
90b08710 | 85 | static DECLARE_WAIT_QUEUE_HEAD(resync_wait); |
e804ac78 TH |
86 | static struct workqueue_struct *md_wq; |
87 | static struct workqueue_struct *md_misc_wq; | |
cc1ffe61 | 88 | static struct workqueue_struct *md_rdev_misc_wq; |
90b08710 | 89 | |
746d3207 N |
90 | static int remove_and_add_spares(struct mddev *mddev, |
91 | struct md_rdev *this); | |
5aa61f42 | 92 | static void mddev_detach(struct mddev *mddev); |
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 | |
1da177e4 LT |
100 | /* |
101 | * Current RAID-1,4,5 parallel reconstruction 'guaranteed speed limit' | |
102 | * is 1000 KB/sec, so the extra system load does not show up that much. | |
103 | * Increase it if you want to have more _guaranteed_ speed. Note that | |
338cec32 | 104 | * the RAID driver will use the maximum available bandwidth if the IO |
1da177e4 LT |
105 | * subsystem is idle. There is also an 'absolute maximum' reconstruction |
106 | * speed limit - in case reconstruction slows down your system despite | |
107 | * idle IO detection. | |
108 | * | |
109 | * you can change it via /proc/sys/dev/raid/speed_limit_min and _max. | |
88202a0c | 110 | * or /sys/block/mdX/md/sync_speed_{min,max} |
1da177e4 LT |
111 | */ |
112 | ||
113 | static int sysctl_speed_limit_min = 1000; | |
114 | static int sysctl_speed_limit_max = 200000; | |
fd01b88c | 115 | static inline int speed_min(struct mddev *mddev) |
88202a0c N |
116 | { |
117 | return mddev->sync_speed_min ? | |
118 | mddev->sync_speed_min : sysctl_speed_limit_min; | |
119 | } | |
120 | ||
fd01b88c | 121 | static inline int speed_max(struct mddev *mddev) |
88202a0c N |
122 | { |
123 | return mddev->sync_speed_max ? | |
124 | mddev->sync_speed_max : sysctl_speed_limit_max; | |
125 | } | |
1da177e4 | 126 | |
69b00b5b GJ |
127 | static void rdev_uninit_serial(struct md_rdev *rdev) |
128 | { | |
129 | if (!test_and_clear_bit(CollisionCheck, &rdev->flags)) | |
130 | return; | |
131 | ||
025471f9 | 132 | kvfree(rdev->serial); |
69b00b5b GJ |
133 | rdev->serial = NULL; |
134 | } | |
135 | ||
136 | static void rdevs_uninit_serial(struct mddev *mddev) | |
137 | { | |
138 | struct md_rdev *rdev; | |
139 | ||
140 | rdev_for_each(rdev, mddev) | |
141 | rdev_uninit_serial(rdev); | |
142 | } | |
143 | ||
404659cf | 144 | static int rdev_init_serial(struct md_rdev *rdev) |
3e148a32 | 145 | { |
025471f9 GJ |
146 | /* serial_nums equals with BARRIER_BUCKETS_NR */ |
147 | int i, serial_nums = 1 << ((PAGE_SHIFT - ilog2(sizeof(atomic_t)))); | |
69b00b5b GJ |
148 | struct serial_in_rdev *serial = NULL; |
149 | ||
150 | if (test_bit(CollisionCheck, &rdev->flags)) | |
151 | return 0; | |
152 | ||
025471f9 GJ |
153 | serial = kvmalloc(sizeof(struct serial_in_rdev) * serial_nums, |
154 | GFP_KERNEL); | |
69b00b5b GJ |
155 | if (!serial) |
156 | return -ENOMEM; | |
157 | ||
025471f9 GJ |
158 | for (i = 0; i < serial_nums; i++) { |
159 | struct serial_in_rdev *serial_tmp = &serial[i]; | |
160 | ||
161 | spin_lock_init(&serial_tmp->serial_lock); | |
162 | serial_tmp->serial_rb = RB_ROOT_CACHED; | |
163 | init_waitqueue_head(&serial_tmp->serial_io_wait); | |
164 | } | |
165 | ||
69b00b5b | 166 | rdev->serial = serial; |
404659cf | 167 | set_bit(CollisionCheck, &rdev->flags); |
3e148a32 | 168 | |
69b00b5b | 169 | return 0; |
3e148a32 GJ |
170 | } |
171 | ||
69b00b5b | 172 | static int rdevs_init_serial(struct mddev *mddev) |
11d3a9f6 GJ |
173 | { |
174 | struct md_rdev *rdev; | |
69b00b5b | 175 | int ret = 0; |
11d3a9f6 GJ |
176 | |
177 | rdev_for_each(rdev, mddev) { | |
69b00b5b GJ |
178 | ret = rdev_init_serial(rdev); |
179 | if (ret) | |
180 | break; | |
11d3a9f6 | 181 | } |
69b00b5b GJ |
182 | |
183 | /* Free all resources if pool is not existed */ | |
184 | if (ret && !mddev->serial_info_pool) | |
185 | rdevs_uninit_serial(mddev); | |
186 | ||
187 | return ret; | |
11d3a9f6 GJ |
188 | } |
189 | ||
963c555e | 190 | /* |
de31ee94 GJ |
191 | * rdev needs to enable serial stuffs if it meets the conditions: |
192 | * 1. it is multi-queue device flaged with writemostly. | |
193 | * 2. the write-behind mode is enabled. | |
194 | */ | |
195 | static int rdev_need_serial(struct md_rdev *rdev) | |
196 | { | |
197 | return (rdev && rdev->mddev->bitmap_info.max_write_behind > 0 && | |
198 | rdev->bdev->bd_queue->nr_hw_queues != 1 && | |
199 | test_bit(WriteMostly, &rdev->flags)); | |
200 | } | |
201 | ||
202 | /* | |
203 | * Init resource for rdev(s), then create serial_info_pool if: | |
204 | * 1. rdev is the first device which return true from rdev_enable_serial. | |
205 | * 2. rdev is NULL, means we want to enable serialization for all rdevs. | |
963c555e | 206 | */ |
404659cf | 207 | void mddev_create_serial_pool(struct mddev *mddev, struct md_rdev *rdev, |
11d3a9f6 | 208 | bool is_suspend) |
963c555e | 209 | { |
69b00b5b GJ |
210 | int ret = 0; |
211 | ||
de31ee94 GJ |
212 | if (rdev && !rdev_need_serial(rdev) && |
213 | !test_bit(CollisionCheck, &rdev->flags)) | |
963c555e GJ |
214 | return; |
215 | ||
de31ee94 GJ |
216 | if (!is_suspend) |
217 | mddev_suspend(mddev); | |
218 | ||
219 | if (!rdev) | |
69b00b5b | 220 | ret = rdevs_init_serial(mddev); |
de31ee94 | 221 | else |
69b00b5b GJ |
222 | ret = rdev_init_serial(rdev); |
223 | if (ret) | |
224 | goto abort; | |
de31ee94 | 225 | |
404659cf | 226 | if (mddev->serial_info_pool == NULL) { |
3024ba2d CL |
227 | /* |
228 | * already in memalloc noio context by | |
229 | * mddev_suspend() | |
230 | */ | |
404659cf GJ |
231 | mddev->serial_info_pool = |
232 | mempool_create_kmalloc_pool(NR_SERIAL_INFOS, | |
233 | sizeof(struct serial_info)); | |
69b00b5b GJ |
234 | if (!mddev->serial_info_pool) { |
235 | rdevs_uninit_serial(mddev); | |
404659cf | 236 | pr_err("can't alloc memory pool for serialization\n"); |
69b00b5b | 237 | } |
963c555e | 238 | } |
69b00b5b GJ |
239 | |
240 | abort: | |
de31ee94 GJ |
241 | if (!is_suspend) |
242 | mddev_resume(mddev); | |
963c555e | 243 | } |
963c555e GJ |
244 | |
245 | /* | |
de31ee94 GJ |
246 | * Free resource from rdev(s), and destroy serial_info_pool under conditions: |
247 | * 1. rdev is the last device flaged with CollisionCheck. | |
248 | * 2. when bitmap is destroyed while policy is not enabled. | |
249 | * 3. for disable policy, the pool is destroyed only when no rdev needs it. | |
963c555e | 250 | */ |
69b00b5b GJ |
251 | void mddev_destroy_serial_pool(struct mddev *mddev, struct md_rdev *rdev, |
252 | bool is_suspend) | |
963c555e | 253 | { |
11d3a9f6 | 254 | if (rdev && !test_bit(CollisionCheck, &rdev->flags)) |
963c555e GJ |
255 | return; |
256 | ||
404659cf | 257 | if (mddev->serial_info_pool) { |
963c555e | 258 | struct md_rdev *temp; |
de31ee94 | 259 | int num = 0; /* used to track if other rdevs need the pool */ |
963c555e | 260 | |
11d3a9f6 GJ |
261 | if (!is_suspend) |
262 | mddev_suspend(mddev); | |
263 | rdev_for_each(temp, mddev) { | |
264 | if (!rdev) { | |
69b00b5b GJ |
265 | if (!mddev->serialize_policy || |
266 | !rdev_need_serial(temp)) | |
267 | rdev_uninit_serial(temp); | |
de31ee94 GJ |
268 | else |
269 | num++; | |
270 | } else if (temp != rdev && | |
271 | test_bit(CollisionCheck, &temp->flags)) | |
963c555e | 272 | num++; |
11d3a9f6 GJ |
273 | } |
274 | ||
275 | if (rdev) | |
69b00b5b | 276 | rdev_uninit_serial(rdev); |
de31ee94 GJ |
277 | |
278 | if (num) | |
279 | pr_info("The mempool could be used by other devices\n"); | |
280 | else { | |
404659cf GJ |
281 | mempool_destroy(mddev->serial_info_pool); |
282 | mddev->serial_info_pool = NULL; | |
963c555e | 283 | } |
11d3a9f6 GJ |
284 | if (!is_suspend) |
285 | mddev_resume(mddev); | |
963c555e GJ |
286 | } |
287 | } | |
288 | ||
1da177e4 LT |
289 | static struct ctl_table_header *raid_table_header; |
290 | ||
82592c38 | 291 | static struct ctl_table raid_table[] = { |
1da177e4 | 292 | { |
1da177e4 LT |
293 | .procname = "speed_limit_min", |
294 | .data = &sysctl_speed_limit_min, | |
295 | .maxlen = sizeof(int), | |
80ca3a44 | 296 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 297 | .proc_handler = proc_dointvec, |
1da177e4 LT |
298 | }, |
299 | { | |
1da177e4 LT |
300 | .procname = "speed_limit_max", |
301 | .data = &sysctl_speed_limit_max, | |
302 | .maxlen = sizeof(int), | |
80ca3a44 | 303 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 304 | .proc_handler = proc_dointvec, |
1da177e4 | 305 | }, |
894d2491 | 306 | { } |
1da177e4 LT |
307 | }; |
308 | ||
82592c38 | 309 | static struct ctl_table raid_dir_table[] = { |
1da177e4 | 310 | { |
1da177e4 LT |
311 | .procname = "raid", |
312 | .maxlen = 0, | |
80ca3a44 | 313 | .mode = S_IRUGO|S_IXUGO, |
1da177e4 LT |
314 | .child = raid_table, |
315 | }, | |
894d2491 | 316 | { } |
1da177e4 LT |
317 | }; |
318 | ||
82592c38 | 319 | static struct ctl_table raid_root_table[] = { |
1da177e4 | 320 | { |
1da177e4 LT |
321 | .procname = "dev", |
322 | .maxlen = 0, | |
323 | .mode = 0555, | |
324 | .child = raid_dir_table, | |
325 | }, | |
894d2491 | 326 | { } |
1da177e4 LT |
327 | }; |
328 | ||
83d5cde4 | 329 | static const struct block_device_operations md_fops; |
1da177e4 | 330 | |
f91de92e N |
331 | static int start_readonly; |
332 | ||
78b6350d N |
333 | /* |
334 | * The original mechanism for creating an md device is to create | |
335 | * a device node in /dev and to open it. This causes races with device-close. | |
336 | * The preferred method is to write to the "new_array" module parameter. | |
337 | * This can avoid races. | |
338 | * Setting create_on_open to false disables the original mechanism | |
339 | * so all the races disappear. | |
340 | */ | |
341 | static bool create_on_open = true; | |
342 | ||
a167f663 | 343 | struct bio *bio_alloc_mddev(gfp_t gfp_mask, int nr_iovecs, |
fd01b88c | 344 | struct mddev *mddev) |
a167f663 | 345 | { |
afeee514 | 346 | if (!mddev || !bioset_initialized(&mddev->bio_set)) |
a167f663 N |
347 | return bio_alloc(gfp_mask, nr_iovecs); |
348 | ||
6251691a | 349 | return bio_alloc_bioset(gfp_mask, nr_iovecs, &mddev->bio_set); |
a167f663 N |
350 | } |
351 | EXPORT_SYMBOL_GPL(bio_alloc_mddev); | |
352 | ||
5a85071c N |
353 | static struct bio *md_bio_alloc_sync(struct mddev *mddev) |
354 | { | |
afeee514 | 355 | if (!mddev || !bioset_initialized(&mddev->sync_set)) |
5a85071c N |
356 | return bio_alloc(GFP_NOIO, 1); |
357 | ||
afeee514 | 358 | return bio_alloc_bioset(GFP_NOIO, 1, &mddev->sync_set); |
5a85071c N |
359 | } |
360 | ||
d7603b7e N |
361 | /* |
362 | * We have a system wide 'event count' that is incremented | |
363 | * on any 'interesting' event, and readers of /proc/mdstat | |
364 | * can use 'poll' or 'select' to find out when the event | |
365 | * count increases. | |
366 | * | |
367 | * Events are: | |
368 | * start array, stop array, error, add device, remove device, | |
369 | * start build, activate spare | |
370 | */ | |
2989ddbd | 371 | static DECLARE_WAIT_QUEUE_HEAD(md_event_waiters); |
d7603b7e | 372 | static atomic_t md_event_count; |
fd01b88c | 373 | void md_new_event(struct mddev *mddev) |
d7603b7e N |
374 | { |
375 | atomic_inc(&md_event_count); | |
376 | wake_up(&md_event_waiters); | |
377 | } | |
29269553 | 378 | EXPORT_SYMBOL_GPL(md_new_event); |
d7603b7e | 379 | |
1da177e4 LT |
380 | /* |
381 | * Enables to iterate over all existing md arrays | |
382 | * all_mddevs_lock protects this list. | |
383 | */ | |
384 | static LIST_HEAD(all_mddevs); | |
385 | static DEFINE_SPINLOCK(all_mddevs_lock); | |
386 | ||
1da177e4 LT |
387 | /* |
388 | * iterates through all used mddevs in the system. | |
389 | * We take care to grab the all_mddevs_lock whenever navigating | |
390 | * the list, and to always hold a refcount when unlocked. | |
391 | * Any code which breaks out of this loop while own | |
392 | * a reference to the current mddev and must mddev_put it. | |
393 | */ | |
fd01b88c | 394 | #define for_each_mddev(_mddev,_tmp) \ |
1da177e4 | 395 | \ |
f72ffdd6 | 396 | for (({ spin_lock(&all_mddevs_lock); \ |
fd01b88c N |
397 | _tmp = all_mddevs.next; \ |
398 | _mddev = NULL;}); \ | |
399 | ({ if (_tmp != &all_mddevs) \ | |
400 | mddev_get(list_entry(_tmp, struct mddev, all_mddevs));\ | |
1da177e4 | 401 | spin_unlock(&all_mddevs_lock); \ |
fd01b88c N |
402 | if (_mddev) mddev_put(_mddev); \ |
403 | _mddev = list_entry(_tmp, struct mddev, all_mddevs); \ | |
404 | _tmp != &all_mddevs;}); \ | |
1da177e4 | 405 | ({ spin_lock(&all_mddevs_lock); \ |
fd01b88c | 406 | _tmp = _tmp->next;}) \ |
1da177e4 LT |
407 | ) |
408 | ||
409c57f3 N |
409 | /* Rather than calling directly into the personality make_request function, |
410 | * IO requests come here first so that we can check if the device is | |
411 | * being suspended pending a reconfiguration. | |
412 | * We hold a refcount over the call to ->make_request. By the time that | |
413 | * call has finished, the bio has been linked into some internal structure | |
414 | * and so is visible to ->quiesce(), so we don't need the refcount any more. | |
415 | */ | |
b3143b9a N |
416 | static bool is_suspended(struct mddev *mddev, struct bio *bio) |
417 | { | |
418 | if (mddev->suspended) | |
419 | return true; | |
420 | if (bio_data_dir(bio) != WRITE) | |
421 | return false; | |
422 | if (mddev->suspend_lo >= mddev->suspend_hi) | |
423 | return false; | |
424 | if (bio->bi_iter.bi_sector >= mddev->suspend_hi) | |
425 | return false; | |
426 | if (bio_end_sector(bio) < mddev->suspend_lo) | |
427 | return false; | |
428 | return true; | |
429 | } | |
430 | ||
393debc2 SL |
431 | void md_handle_request(struct mddev *mddev, struct bio *bio) |
432 | { | |
433 | check_suspended: | |
434 | rcu_read_lock(); | |
b3143b9a | 435 | if (is_suspended(mddev, bio)) { |
393debc2 SL |
436 | DEFINE_WAIT(__wait); |
437 | for (;;) { | |
438 | prepare_to_wait(&mddev->sb_wait, &__wait, | |
439 | TASK_UNINTERRUPTIBLE); | |
b3143b9a | 440 | if (!is_suspended(mddev, bio)) |
393debc2 SL |
441 | break; |
442 | rcu_read_unlock(); | |
443 | schedule(); | |
444 | rcu_read_lock(); | |
445 | } | |
446 | finish_wait(&mddev->sb_wait, &__wait); | |
447 | } | |
448 | atomic_inc(&mddev->active_io); | |
449 | rcu_read_unlock(); | |
450 | ||
451 | if (!mddev->pers->make_request(mddev, bio)) { | |
452 | atomic_dec(&mddev->active_io); | |
453 | wake_up(&mddev->sb_wait); | |
454 | goto check_suspended; | |
455 | } | |
456 | ||
457 | if (atomic_dec_and_test(&mddev->active_io) && mddev->suspended) | |
458 | wake_up(&mddev->sb_wait); | |
459 | } | |
460 | EXPORT_SYMBOL(md_handle_request); | |
461 | ||
dece1635 | 462 | static blk_qc_t md_make_request(struct request_queue *q, struct bio *bio) |
1da177e4 | 463 | { |
49077326 | 464 | const int rw = bio_data_dir(bio); |
ddcf35d3 | 465 | const int sgrp = op_stat_group(bio_op(bio)); |
e4fc5a74 | 466 | struct mddev *mddev = bio->bi_disk->private_data; |
e91ece55 | 467 | unsigned int sectors; |
49077326 | 468 | |
62f7b198 GP |
469 | if (unlikely(test_bit(MD_BROKEN, &mddev->flags)) && (rw == WRITE)) { |
470 | bio_io_error(bio); | |
471 | return BLK_QC_T_NONE; | |
472 | } | |
473 | ||
af67c31f | 474 | blk_queue_split(q, &bio); |
54efd50b | 475 | |
274d8cbd | 476 | if (mddev == NULL || mddev->pers == NULL) { |
409c57f3 | 477 | bio_io_error(bio); |
dece1635 | 478 | return BLK_QC_T_NONE; |
409c57f3 | 479 | } |
bbfa57c0 | 480 | if (mddev->ro == 1 && unlikely(rw == WRITE)) { |
4246a0b6 | 481 | if (bio_sectors(bio) != 0) |
4e4cbee9 | 482 | bio->bi_status = BLK_STS_IOERR; |
4246a0b6 | 483 | bio_endio(bio); |
dece1635 | 484 | return BLK_QC_T_NONE; |
bbfa57c0 | 485 | } |
49077326 | 486 | |
e91ece55 CM |
487 | /* |
488 | * save the sectors now since our bio can | |
489 | * go away inside make_request | |
490 | */ | |
491 | sectors = bio_sectors(bio); | |
9c573de3 | 492 | /* bio could be mergeable after passing to underlayer */ |
1eff9d32 | 493 | bio->bi_opf &= ~REQ_NOMERGE; |
393debc2 SL |
494 | |
495 | md_handle_request(mddev, bio); | |
49077326 | 496 | |
112f158f MS |
497 | part_stat_lock(); |
498 | part_stat_inc(&mddev->gendisk->part0, ios[sgrp]); | |
499 | part_stat_add(&mddev->gendisk->part0, sectors[sgrp], sectors); | |
74672d06 | 500 | part_stat_unlock(); |
49077326 | 501 | |
dece1635 | 502 | return BLK_QC_T_NONE; |
409c57f3 N |
503 | } |
504 | ||
9e35b99c N |
505 | /* mddev_suspend makes sure no new requests are submitted |
506 | * to the device, and that any requests that have been submitted | |
507 | * are completely handled. | |
afa0f557 N |
508 | * Once mddev_detach() is called and completes, the module will be |
509 | * completely unused. | |
9e35b99c | 510 | */ |
fd01b88c | 511 | void mddev_suspend(struct mddev *mddev) |
409c57f3 | 512 | { |
092398dc | 513 | WARN_ON_ONCE(mddev->thread && current == mddev->thread->tsk); |
4d5324f7 | 514 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
515 | if (mddev->suspended++) |
516 | return; | |
409c57f3 | 517 | synchronize_rcu(); |
cc27b0c7 | 518 | wake_up(&mddev->sb_wait); |
35bfc521 N |
519 | set_bit(MD_ALLOW_SB_UPDATE, &mddev->flags); |
520 | smp_mb__after_atomic(); | |
409c57f3 N |
521 | wait_event(mddev->sb_wait, atomic_read(&mddev->active_io) == 0); |
522 | mddev->pers->quiesce(mddev, 1); | |
35bfc521 N |
523 | clear_bit_unlock(MD_ALLOW_SB_UPDATE, &mddev->flags); |
524 | wait_event(mddev->sb_wait, !test_bit(MD_UPDATING_SB, &mddev->flags)); | |
0d9f4f13 JB |
525 | |
526 | del_timer_sync(&mddev->safemode_timer); | |
78f57ef9 CL |
527 | /* restrict memory reclaim I/O during raid array is suspend */ |
528 | mddev->noio_flag = memalloc_noio_save(); | |
409c57f3 | 529 | } |
390ee602 | 530 | EXPORT_SYMBOL_GPL(mddev_suspend); |
409c57f3 | 531 | |
fd01b88c | 532 | void mddev_resume(struct mddev *mddev) |
409c57f3 | 533 | { |
78f57ef9 CL |
534 | /* entred the memalloc scope from mddev_suspend() */ |
535 | memalloc_noio_restore(mddev->noio_flag); | |
4d5324f7 | 536 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
537 | if (--mddev->suspended) |
538 | return; | |
409c57f3 N |
539 | wake_up(&mddev->sb_wait); |
540 | mddev->pers->quiesce(mddev, 0); | |
0fd018af | 541 | |
47525e59 | 542 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
0fd018af JB |
543 | md_wakeup_thread(mddev->thread); |
544 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
1da177e4 | 545 | } |
390ee602 | 546 | EXPORT_SYMBOL_GPL(mddev_resume); |
1da177e4 | 547 | |
fd01b88c | 548 | int mddev_congested(struct mddev *mddev, int bits) |
3fa841d7 | 549 | { |
5c675f83 N |
550 | struct md_personality *pers = mddev->pers; |
551 | int ret = 0; | |
552 | ||
553 | rcu_read_lock(); | |
554 | if (mddev->suspended) | |
555 | ret = 1; | |
556 | else if (pers && pers->congested) | |
557 | ret = pers->congested(mddev, bits); | |
558 | rcu_read_unlock(); | |
559 | return ret; | |
560 | } | |
561 | EXPORT_SYMBOL_GPL(mddev_congested); | |
562 | static int md_congested(void *data, int bits) | |
563 | { | |
564 | struct mddev *mddev = data; | |
565 | return mddev_congested(mddev, bits); | |
3fa841d7 | 566 | } |
3fa841d7 | 567 | |
a2826aa9 | 568 | /* |
e9c7469b | 569 | * Generic flush handling for md |
a2826aa9 N |
570 | */ |
571 | ||
4bc034d3 | 572 | static void md_end_flush(struct bio *bio) |
a2826aa9 | 573 | { |
4bc034d3 N |
574 | struct md_rdev *rdev = bio->bi_private; |
575 | struct mddev *mddev = rdev->mddev; | |
a2826aa9 N |
576 | |
577 | rdev_dec_pending(rdev, mddev); | |
578 | ||
4bc034d3 N |
579 | if (atomic_dec_and_test(&mddev->flush_pending)) { |
580 | /* The pre-request flush has finished */ | |
581 | queue_work(md_wq, &mddev->flush_work); | |
a2826aa9 | 582 | } |
4bc034d3 | 583 | bio_put(bio); |
5a409b4f | 584 | } |
a7a07e69 | 585 | |
4bc034d3 N |
586 | static void md_submit_flush_data(struct work_struct *ws); |
587 | ||
588 | static void submit_flushes(struct work_struct *ws) | |
a2826aa9 | 589 | { |
4bc034d3 | 590 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); |
3cb03002 | 591 | struct md_rdev *rdev; |
a2826aa9 | 592 | |
2bc13b83 | 593 | mddev->start_flush = ktime_get_boottime(); |
4bc034d3 N |
594 | INIT_WORK(&mddev->flush_work, md_submit_flush_data); |
595 | atomic_set(&mddev->flush_pending, 1); | |
a2826aa9 | 596 | rcu_read_lock(); |
dafb20fa | 597 | rdev_for_each_rcu(rdev, mddev) |
a2826aa9 N |
598 | if (rdev->raid_disk >= 0 && |
599 | !test_bit(Faulty, &rdev->flags)) { | |
600 | /* Take two references, one is dropped | |
601 | * when request finishes, one after | |
602 | * we reclaim rcu_read_lock | |
603 | */ | |
604 | struct bio *bi; | |
605 | atomic_inc(&rdev->nr_pending); | |
606 | atomic_inc(&rdev->nr_pending); | |
607 | rcu_read_unlock(); | |
b5e1b8ce | 608 | bi = bio_alloc_mddev(GFP_NOIO, 0, mddev); |
5a409b4f | 609 | bi->bi_end_io = md_end_flush; |
4bc034d3 N |
610 | bi->bi_private = rdev; |
611 | bio_set_dev(bi, rdev->bdev); | |
70fd7614 | 612 | bi->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH; |
4bc034d3 | 613 | atomic_inc(&mddev->flush_pending); |
4e49ea4a | 614 | submit_bio(bi); |
a2826aa9 N |
615 | rcu_read_lock(); |
616 | rdev_dec_pending(rdev, mddev); | |
617 | } | |
618 | rcu_read_unlock(); | |
4bc034d3 N |
619 | if (atomic_dec_and_test(&mddev->flush_pending)) |
620 | queue_work(md_wq, &mddev->flush_work); | |
621 | } | |
a2826aa9 | 622 | |
4bc034d3 N |
623 | static void md_submit_flush_data(struct work_struct *ws) |
624 | { | |
625 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); | |
626 | struct bio *bio = mddev->flush_bio; | |
627 | ||
628 | /* | |
629 | * must reset flush_bio before calling into md_handle_request to avoid a | |
630 | * deadlock, because other bios passed md_handle_request suspend check | |
631 | * could wait for this and below md_handle_request could wait for those | |
632 | * bios because of suspend check | |
633 | */ | |
2bc13b83 | 634 | mddev->last_flush = mddev->start_flush; |
4bc034d3 N |
635 | mddev->flush_bio = NULL; |
636 | wake_up(&mddev->sb_wait); | |
637 | ||
638 | if (bio->bi_iter.bi_size == 0) { | |
639 | /* an empty barrier - all done */ | |
640 | bio_endio(bio); | |
641 | } else { | |
642 | bio->bi_opf &= ~REQ_PREFLUSH; | |
643 | md_handle_request(mddev, bio); | |
a2826aa9 | 644 | } |
a2826aa9 | 645 | } |
4bc034d3 | 646 | |
775d7831 DJ |
647 | /* |
648 | * Manages consolidation of flushes and submitting any flushes needed for | |
649 | * a bio with REQ_PREFLUSH. Returns true if the bio is finished or is | |
650 | * being finished in another context. Returns false if the flushing is | |
651 | * complete but still needs the I/O portion of the bio to be processed. | |
652 | */ | |
653 | bool md_flush_request(struct mddev *mddev, struct bio *bio) | |
4bc034d3 | 654 | { |
2bc13b83 | 655 | ktime_t start = ktime_get_boottime(); |
4bc034d3 N |
656 | spin_lock_irq(&mddev->lock); |
657 | wait_event_lock_irq(mddev->sb_wait, | |
2bc13b83 N |
658 | !mddev->flush_bio || |
659 | ktime_after(mddev->last_flush, start), | |
4bc034d3 | 660 | mddev->lock); |
2bc13b83 N |
661 | if (!ktime_after(mddev->last_flush, start)) { |
662 | WARN_ON(mddev->flush_bio); | |
663 | mddev->flush_bio = bio; | |
664 | bio = NULL; | |
665 | } | |
4bc034d3 N |
666 | spin_unlock_irq(&mddev->lock); |
667 | ||
2bc13b83 N |
668 | if (!bio) { |
669 | INIT_WORK(&mddev->flush_work, submit_flushes); | |
670 | queue_work(md_wq, &mddev->flush_work); | |
671 | } else { | |
672 | /* flush was performed for some other bio while we waited. */ | |
673 | if (bio->bi_iter.bi_size == 0) | |
674 | /* an empty barrier - all done */ | |
675 | bio_endio(bio); | |
676 | else { | |
677 | bio->bi_opf &= ~REQ_PREFLUSH; | |
775d7831 | 678 | return false; |
2bc13b83 N |
679 | } |
680 | } | |
775d7831 | 681 | return true; |
4bc034d3 | 682 | } |
e9c7469b | 683 | EXPORT_SYMBOL(md_flush_request); |
409c57f3 | 684 | |
fd01b88c | 685 | static inline struct mddev *mddev_get(struct mddev *mddev) |
1da177e4 LT |
686 | { |
687 | atomic_inc(&mddev->active); | |
688 | return mddev; | |
689 | } | |
690 | ||
5fd3a17e | 691 | static void mddev_delayed_delete(struct work_struct *ws); |
d3374825 | 692 | |
fd01b88c | 693 | static void mddev_put(struct mddev *mddev) |
1da177e4 LT |
694 | { |
695 | if (!atomic_dec_and_lock(&mddev->active, &all_mddevs_lock)) | |
696 | return; | |
d3374825 | 697 | if (!mddev->raid_disks && list_empty(&mddev->disks) && |
cbd19983 N |
698 | mddev->ctime == 0 && !mddev->hold_active) { |
699 | /* Array is not configured at all, and not held active, | |
700 | * so destroy it */ | |
af8a2434 | 701 | list_del_init(&mddev->all_mddevs); |
28dec870 KO |
702 | |
703 | /* | |
704 | * Call queue_work inside the spinlock so that | |
705 | * flush_workqueue() after mddev_find will succeed in waiting | |
706 | * for the work to be done. | |
707 | */ | |
708 | INIT_WORK(&mddev->del_work, mddev_delayed_delete); | |
709 | queue_work(md_misc_wq, &mddev->del_work); | |
d3374825 N |
710 | } |
711 | spin_unlock(&all_mddevs_lock); | |
1da177e4 LT |
712 | } |
713 | ||
8376d3c1 | 714 | static void md_safemode_timeout(struct timer_list *t); |
25b2edfa | 715 | |
fd01b88c | 716 | void mddev_init(struct mddev *mddev) |
fafd7fb0 | 717 | { |
28dec870 | 718 | kobject_init(&mddev->kobj, &md_ktype); |
fafd7fb0 N |
719 | mutex_init(&mddev->open_mutex); |
720 | mutex_init(&mddev->reconfig_mutex); | |
721 | mutex_init(&mddev->bitmap_info.mutex); | |
722 | INIT_LIST_HEAD(&mddev->disks); | |
723 | INIT_LIST_HEAD(&mddev->all_mddevs); | |
8376d3c1 | 724 | timer_setup(&mddev->safemode_timer, md_safemode_timeout, 0); |
fafd7fb0 N |
725 | atomic_set(&mddev->active, 1); |
726 | atomic_set(&mddev->openers, 0); | |
727 | atomic_set(&mddev->active_io, 0); | |
85572d7c | 728 | spin_lock_init(&mddev->lock); |
4bc034d3 | 729 | atomic_set(&mddev->flush_pending, 0); |
fafd7fb0 N |
730 | init_waitqueue_head(&mddev->sb_wait); |
731 | init_waitqueue_head(&mddev->recovery_wait); | |
732 | mddev->reshape_position = MaxSector; | |
2c810cdd | 733 | mddev->reshape_backwards = 0; |
c4a39551 | 734 | mddev->last_sync_action = "none"; |
fafd7fb0 N |
735 | mddev->resync_min = 0; |
736 | mddev->resync_max = MaxSector; | |
737 | mddev->level = LEVEL_NONE; | |
738 | } | |
390ee602 | 739 | EXPORT_SYMBOL_GPL(mddev_init); |
fafd7fb0 | 740 | |
f72ffdd6 | 741 | static struct mddev *mddev_find(dev_t unit) |
1da177e4 | 742 | { |
fd01b88c | 743 | struct mddev *mddev, *new = NULL; |
1da177e4 | 744 | |
8f5f02c4 N |
745 | if (unit && MAJOR(unit) != MD_MAJOR) |
746 | unit &= ~((1<<MdpMinorShift)-1); | |
747 | ||
1da177e4 LT |
748 | retry: |
749 | spin_lock(&all_mddevs_lock); | |
efeb53c0 N |
750 | |
751 | if (unit) { | |
752 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
753 | if (mddev->unit == unit) { | |
754 | mddev_get(mddev); | |
755 | spin_unlock(&all_mddevs_lock); | |
756 | kfree(new); | |
757 | return mddev; | |
758 | } | |
759 | ||
760 | if (new) { | |
761 | list_add(&new->all_mddevs, &all_mddevs); | |
1da177e4 | 762 | spin_unlock(&all_mddevs_lock); |
efeb53c0 N |
763 | new->hold_active = UNTIL_IOCTL; |
764 | return new; | |
1da177e4 | 765 | } |
efeb53c0 N |
766 | } else if (new) { |
767 | /* find an unused unit number */ | |
768 | static int next_minor = 512; | |
769 | int start = next_minor; | |
770 | int is_free = 0; | |
771 | int dev = 0; | |
772 | while (!is_free) { | |
773 | dev = MKDEV(MD_MAJOR, next_minor); | |
774 | next_minor++; | |
775 | if (next_minor > MINORMASK) | |
776 | next_minor = 0; | |
777 | if (next_minor == start) { | |
778 | /* Oh dear, all in use. */ | |
779 | spin_unlock(&all_mddevs_lock); | |
780 | kfree(new); | |
781 | return NULL; | |
782 | } | |
f72ffdd6 | 783 | |
efeb53c0 N |
784 | is_free = 1; |
785 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
786 | if (mddev->unit == dev) { | |
787 | is_free = 0; | |
788 | break; | |
789 | } | |
790 | } | |
791 | new->unit = dev; | |
792 | new->md_minor = MINOR(dev); | |
793 | new->hold_active = UNTIL_STOP; | |
1da177e4 LT |
794 | list_add(&new->all_mddevs, &all_mddevs); |
795 | spin_unlock(&all_mddevs_lock); | |
796 | return new; | |
797 | } | |
798 | spin_unlock(&all_mddevs_lock); | |
799 | ||
9ffae0cf | 800 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
1da177e4 LT |
801 | if (!new) |
802 | return NULL; | |
803 | ||
1da177e4 LT |
804 | new->unit = unit; |
805 | if (MAJOR(unit) == MD_MAJOR) | |
806 | new->md_minor = MINOR(unit); | |
807 | else | |
808 | new->md_minor = MINOR(unit) >> MdpMinorShift; | |
809 | ||
fafd7fb0 | 810 | mddev_init(new); |
1da177e4 | 811 | |
1da177e4 LT |
812 | goto retry; |
813 | } | |
814 | ||
b6eb127d N |
815 | static struct attribute_group md_redundancy_group; |
816 | ||
5c47daf6 | 817 | void mddev_unlock(struct mddev *mddev) |
1da177e4 | 818 | { |
a64c876f | 819 | if (mddev->to_remove) { |
b6eb127d N |
820 | /* These cannot be removed under reconfig_mutex as |
821 | * an access to the files will try to take reconfig_mutex | |
822 | * while holding the file unremovable, which leads to | |
823 | * a deadlock. | |
bb4f1e9d N |
824 | * So hold set sysfs_active while the remove in happeing, |
825 | * and anything else which might set ->to_remove or my | |
826 | * otherwise change the sysfs namespace will fail with | |
827 | * -EBUSY if sysfs_active is still set. | |
828 | * We set sysfs_active under reconfig_mutex and elsewhere | |
829 | * test it under the same mutex to ensure its correct value | |
830 | * is seen. | |
b6eb127d | 831 | */ |
a64c876f N |
832 | struct attribute_group *to_remove = mddev->to_remove; |
833 | mddev->to_remove = NULL; | |
bb4f1e9d | 834 | mddev->sysfs_active = 1; |
b6eb127d N |
835 | mutex_unlock(&mddev->reconfig_mutex); |
836 | ||
00bcb4ac N |
837 | if (mddev->kobj.sd) { |
838 | if (to_remove != &md_redundancy_group) | |
839 | sysfs_remove_group(&mddev->kobj, to_remove); | |
840 | if (mddev->pers == NULL || | |
841 | mddev->pers->sync_request == NULL) { | |
842 | sysfs_remove_group(&mddev->kobj, &md_redundancy_group); | |
843 | if (mddev->sysfs_action) | |
844 | sysfs_put(mddev->sysfs_action); | |
845 | mddev->sysfs_action = NULL; | |
846 | } | |
a64c876f | 847 | } |
bb4f1e9d | 848 | mddev->sysfs_active = 0; |
b6eb127d N |
849 | } else |
850 | mutex_unlock(&mddev->reconfig_mutex); | |
1da177e4 | 851 | |
751e67ca CD |
852 | /* As we've dropped the mutex we need a spinlock to |
853 | * make sure the thread doesn't disappear | |
01f96c0a N |
854 | */ |
855 | spin_lock(&pers_lock); | |
005eca5e | 856 | md_wakeup_thread(mddev->thread); |
4d5324f7 | 857 | wake_up(&mddev->sb_wait); |
01f96c0a | 858 | spin_unlock(&pers_lock); |
1da177e4 | 859 | } |
5c47daf6 | 860 | EXPORT_SYMBOL_GPL(mddev_unlock); |
1da177e4 | 861 | |
57d051dc | 862 | struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr) |
1ca69c4b N |
863 | { |
864 | struct md_rdev *rdev; | |
865 | ||
866 | rdev_for_each_rcu(rdev, mddev) | |
867 | if (rdev->desc_nr == nr) | |
868 | return rdev; | |
869 | ||
870 | return NULL; | |
871 | } | |
57d051dc | 872 | EXPORT_SYMBOL_GPL(md_find_rdev_nr_rcu); |
1ca69c4b N |
873 | |
874 | static struct md_rdev *find_rdev(struct mddev *mddev, dev_t dev) | |
1da177e4 | 875 | { |
3cb03002 | 876 | struct md_rdev *rdev; |
1da177e4 | 877 | |
dafb20fa | 878 | rdev_for_each(rdev, mddev) |
1da177e4 LT |
879 | if (rdev->bdev->bd_dev == dev) |
880 | return rdev; | |
159ec1fc | 881 | |
1da177e4 LT |
882 | return NULL; |
883 | } | |
884 | ||
1532d9e8 | 885 | struct md_rdev *md_find_rdev_rcu(struct mddev *mddev, dev_t dev) |
1ca69c4b N |
886 | { |
887 | struct md_rdev *rdev; | |
888 | ||
889 | rdev_for_each_rcu(rdev, mddev) | |
890 | if (rdev->bdev->bd_dev == dev) | |
891 | return rdev; | |
892 | ||
893 | return NULL; | |
894 | } | |
1532d9e8 | 895 | EXPORT_SYMBOL_GPL(md_find_rdev_rcu); |
1ca69c4b | 896 | |
84fc4b56 | 897 | static struct md_personality *find_pers(int level, char *clevel) |
2604b703 | 898 | { |
84fc4b56 | 899 | struct md_personality *pers; |
d9d166c2 N |
900 | list_for_each_entry(pers, &pers_list, list) { |
901 | if (level != LEVEL_NONE && pers->level == level) | |
2604b703 | 902 | return pers; |
d9d166c2 N |
903 | if (strcmp(pers->name, clevel)==0) |
904 | return pers; | |
905 | } | |
2604b703 N |
906 | return NULL; |
907 | } | |
908 | ||
b73df2d3 | 909 | /* return the offset of the super block in 512byte sectors */ |
3cb03002 | 910 | static inline sector_t calc_dev_sboffset(struct md_rdev *rdev) |
1da177e4 | 911 | { |
57b2caa3 | 912 | sector_t num_sectors = i_size_read(rdev->bdev->bd_inode) / 512; |
b73df2d3 | 913 | return MD_NEW_SIZE_SECTORS(num_sectors); |
1da177e4 LT |
914 | } |
915 | ||
f72ffdd6 | 916 | static int alloc_disk_sb(struct md_rdev *rdev) |
1da177e4 | 917 | { |
1da177e4 | 918 | rdev->sb_page = alloc_page(GFP_KERNEL); |
7f0f0d87 | 919 | if (!rdev->sb_page) |
ebc24337 | 920 | return -ENOMEM; |
1da177e4 LT |
921 | return 0; |
922 | } | |
923 | ||
545c8795 | 924 | void md_rdev_clear(struct md_rdev *rdev) |
1da177e4 LT |
925 | { |
926 | if (rdev->sb_page) { | |
2d1f3b5d | 927 | put_page(rdev->sb_page); |
1da177e4 LT |
928 | rdev->sb_loaded = 0; |
929 | rdev->sb_page = NULL; | |
0f420358 | 930 | rdev->sb_start = 0; |
dd8ac336 | 931 | rdev->sectors = 0; |
1da177e4 | 932 | } |
2699b672 N |
933 | if (rdev->bb_page) { |
934 | put_page(rdev->bb_page); | |
935 | rdev->bb_page = NULL; | |
936 | } | |
d3b407fb | 937 | badblocks_exit(&rdev->badblocks); |
1da177e4 | 938 | } |
545c8795 | 939 | EXPORT_SYMBOL_GPL(md_rdev_clear); |
1da177e4 | 940 | |
4246a0b6 | 941 | static void super_written(struct bio *bio) |
7bfa19f2 | 942 | { |
3cb03002 | 943 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 944 | struct mddev *mddev = rdev->mddev; |
7bfa19f2 | 945 | |
4e4cbee9 CH |
946 | if (bio->bi_status) { |
947 | pr_err("md: super_written gets error=%d\n", bio->bi_status); | |
a9701a30 | 948 | md_error(mddev, rdev); |
46533ff7 N |
949 | if (!test_bit(Faulty, &rdev->flags) |
950 | && (bio->bi_opf & MD_FAILFAST)) { | |
2953079c | 951 | set_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags); |
46533ff7 N |
952 | set_bit(LastDev, &rdev->flags); |
953 | } | |
954 | } else | |
955 | clear_bit(LastDev, &rdev->flags); | |
7bfa19f2 | 956 | |
a9701a30 N |
957 | if (atomic_dec_and_test(&mddev->pending_writes)) |
958 | wake_up(&mddev->sb_wait); | |
ed3b98c7 | 959 | rdev_dec_pending(rdev, mddev); |
f8b58edf | 960 | bio_put(bio); |
7bfa19f2 N |
961 | } |
962 | ||
fd01b88c | 963 | void md_super_write(struct mddev *mddev, struct md_rdev *rdev, |
7bfa19f2 N |
964 | sector_t sector, int size, struct page *page) |
965 | { | |
966 | /* write first size bytes of page to sector of rdev | |
967 | * Increment mddev->pending_writes before returning | |
968 | * and decrement it on completion, waking up sb_wait | |
969 | * if zero is reached. | |
970 | * If an error occurred, call md_error | |
971 | */ | |
46533ff7 N |
972 | struct bio *bio; |
973 | int ff = 0; | |
974 | ||
4b6c1060 HM |
975 | if (!page) |
976 | return; | |
977 | ||
46533ff7 N |
978 | if (test_bit(Faulty, &rdev->flags)) |
979 | return; | |
980 | ||
5a85071c | 981 | bio = md_bio_alloc_sync(mddev); |
7bfa19f2 | 982 | |
ed3b98c7 SL |
983 | atomic_inc(&rdev->nr_pending); |
984 | ||
74d46992 | 985 | bio_set_dev(bio, rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev); |
4f024f37 | 986 | bio->bi_iter.bi_sector = sector; |
7bfa19f2 N |
987 | bio_add_page(bio, page, size, 0); |
988 | bio->bi_private = rdev; | |
989 | bio->bi_end_io = super_written; | |
46533ff7 N |
990 | |
991 | if (test_bit(MD_FAILFAST_SUPPORTED, &mddev->flags) && | |
992 | test_bit(FailFast, &rdev->flags) && | |
993 | !test_bit(LastDev, &rdev->flags)) | |
994 | ff = MD_FAILFAST; | |
5a8948f8 | 995 | bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH | REQ_FUA | ff; |
a9701a30 | 996 | |
7bfa19f2 | 997 | atomic_inc(&mddev->pending_writes); |
4e49ea4a | 998 | submit_bio(bio); |
a9701a30 N |
999 | } |
1000 | ||
46533ff7 | 1001 | int md_super_wait(struct mddev *mddev) |
a9701a30 | 1002 | { |
e9c7469b | 1003 | /* wait for all superblock writes that were scheduled to complete */ |
1967cd56 | 1004 | wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0); |
2953079c | 1005 | if (test_and_clear_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags)) |
46533ff7 N |
1006 | return -EAGAIN; |
1007 | return 0; | |
7bfa19f2 N |
1008 | } |
1009 | ||
3cb03002 | 1010 | int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, |
796a5cf0 | 1011 | struct page *page, int op, int op_flags, bool metadata_op) |
1da177e4 | 1012 | { |
5a85071c | 1013 | struct bio *bio = md_bio_alloc_sync(rdev->mddev); |
1da177e4 LT |
1014 | int ret; |
1015 | ||
74d46992 CH |
1016 | if (metadata_op && rdev->meta_bdev) |
1017 | bio_set_dev(bio, rdev->meta_bdev); | |
1018 | else | |
1019 | bio_set_dev(bio, rdev->bdev); | |
796a5cf0 | 1020 | bio_set_op_attrs(bio, op, op_flags); |
ccebd4c4 | 1021 | if (metadata_op) |
4f024f37 | 1022 | bio->bi_iter.bi_sector = sector + rdev->sb_start; |
1fdd6fc9 N |
1023 | else if (rdev->mddev->reshape_position != MaxSector && |
1024 | (rdev->mddev->reshape_backwards == | |
1025 | (sector >= rdev->mddev->reshape_position))) | |
4f024f37 | 1026 | bio->bi_iter.bi_sector = sector + rdev->new_data_offset; |
ccebd4c4 | 1027 | else |
4f024f37 | 1028 | bio->bi_iter.bi_sector = sector + rdev->data_offset; |
1da177e4 | 1029 | bio_add_page(bio, page, size, 0); |
4e49ea4a MC |
1030 | |
1031 | submit_bio_wait(bio); | |
1da177e4 | 1032 | |
4e4cbee9 | 1033 | ret = !bio->bi_status; |
1da177e4 LT |
1034 | bio_put(bio); |
1035 | return ret; | |
1036 | } | |
a8745db2 | 1037 | EXPORT_SYMBOL_GPL(sync_page_io); |
1da177e4 | 1038 | |
f72ffdd6 | 1039 | static int read_disk_sb(struct md_rdev *rdev, int size) |
1da177e4 LT |
1040 | { |
1041 | char b[BDEVNAME_SIZE]; | |
403df478 | 1042 | |
1da177e4 LT |
1043 | if (rdev->sb_loaded) |
1044 | return 0; | |
1045 | ||
796a5cf0 | 1046 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, REQ_OP_READ, 0, true)) |
1da177e4 LT |
1047 | goto fail; |
1048 | rdev->sb_loaded = 1; | |
1049 | return 0; | |
1050 | ||
1051 | fail: | |
9d48739e N |
1052 | pr_err("md: disabled device %s, could not read superblock.\n", |
1053 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
1054 | return -EINVAL; |
1055 | } | |
1056 | ||
e6fd2093 | 1057 | static int md_uuid_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 | 1058 | { |
f72ffdd6 | 1059 | return sb1->set_uuid0 == sb2->set_uuid0 && |
05710466 AN |
1060 | sb1->set_uuid1 == sb2->set_uuid1 && |
1061 | sb1->set_uuid2 == sb2->set_uuid2 && | |
1062 | sb1->set_uuid3 == sb2->set_uuid3; | |
1da177e4 LT |
1063 | } |
1064 | ||
e6fd2093 | 1065 | static int md_sb_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 LT |
1066 | { |
1067 | int ret; | |
1068 | mdp_super_t *tmp1, *tmp2; | |
1069 | ||
1070 | tmp1 = kmalloc(sizeof(*tmp1),GFP_KERNEL); | |
1071 | tmp2 = kmalloc(sizeof(*tmp2),GFP_KERNEL); | |
1072 | ||
1073 | if (!tmp1 || !tmp2) { | |
1074 | ret = 0; | |
1da177e4 LT |
1075 | goto abort; |
1076 | } | |
1077 | ||
1078 | *tmp1 = *sb1; | |
1079 | *tmp2 = *sb2; | |
1080 | ||
1081 | /* | |
1082 | * nr_disks is not constant | |
1083 | */ | |
1084 | tmp1->nr_disks = 0; | |
1085 | tmp2->nr_disks = 0; | |
1086 | ||
ce0c8e05 | 1087 | ret = (memcmp(tmp1, tmp2, MD_SB_GENERIC_CONSTANT_WORDS * 4) == 0); |
1da177e4 | 1088 | abort: |
990a8baf JJ |
1089 | kfree(tmp1); |
1090 | kfree(tmp2); | |
1da177e4 LT |
1091 | return ret; |
1092 | } | |
1093 | ||
4d167f09 N |
1094 | static u32 md_csum_fold(u32 csum) |
1095 | { | |
1096 | csum = (csum & 0xffff) + (csum >> 16); | |
1097 | return (csum & 0xffff) + (csum >> 16); | |
1098 | } | |
1099 | ||
f72ffdd6 | 1100 | static unsigned int calc_sb_csum(mdp_super_t *sb) |
1da177e4 | 1101 | { |
4d167f09 N |
1102 | u64 newcsum = 0; |
1103 | u32 *sb32 = (u32*)sb; | |
1104 | int i; | |
1da177e4 LT |
1105 | unsigned int disk_csum, csum; |
1106 | ||
1107 | disk_csum = sb->sb_csum; | |
1108 | sb->sb_csum = 0; | |
4d167f09 N |
1109 | |
1110 | for (i = 0; i < MD_SB_BYTES/4 ; i++) | |
1111 | newcsum += sb32[i]; | |
1112 | csum = (newcsum & 0xffffffff) + (newcsum>>32); | |
1113 | ||
4d167f09 N |
1114 | #ifdef CONFIG_ALPHA |
1115 | /* This used to use csum_partial, which was wrong for several | |
1116 | * reasons including that different results are returned on | |
1117 | * different architectures. It isn't critical that we get exactly | |
1118 | * the same return value as before (we always csum_fold before | |
1119 | * testing, and that removes any differences). However as we | |
1120 | * know that csum_partial always returned a 16bit value on | |
1121 | * alphas, do a fold to maximise conformity to previous behaviour. | |
1122 | */ | |
1123 | sb->sb_csum = md_csum_fold(disk_csum); | |
1124 | #else | |
1da177e4 | 1125 | sb->sb_csum = disk_csum; |
4d167f09 | 1126 | #endif |
1da177e4 LT |
1127 | return csum; |
1128 | } | |
1129 | ||
1da177e4 LT |
1130 | /* |
1131 | * Handle superblock details. | |
1132 | * We want to be able to handle multiple superblock formats | |
1133 | * so we have a common interface to them all, and an array of | |
1134 | * different handlers. | |
1135 | * We rely on user-space to write the initial superblock, and support | |
1136 | * reading and updating of superblocks. | |
1137 | * Interface methods are: | |
3cb03002 | 1138 | * int load_super(struct md_rdev *dev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1139 | * loads and validates a superblock on dev. |
1140 | * if refdev != NULL, compare superblocks on both devices | |
1141 | * Return: | |
1142 | * 0 - dev has a superblock that is compatible with refdev | |
1143 | * 1 - dev has a superblock that is compatible and newer than refdev | |
1144 | * so dev should be used as the refdev in future | |
1145 | * -EINVAL superblock incompatible or invalid | |
1146 | * -othererror e.g. -EIO | |
1147 | * | |
fd01b88c | 1148 | * int validate_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1149 | * Verify that dev is acceptable into mddev. |
1150 | * The first time, mddev->raid_disks will be 0, and data from | |
1151 | * dev should be merged in. Subsequent calls check that dev | |
1152 | * is new enough. Return 0 or -EINVAL | |
1153 | * | |
fd01b88c | 1154 | * void sync_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1155 | * Update the superblock for rdev with data in mddev |
1156 | * This does not write to disc. | |
1157 | * | |
1158 | */ | |
1159 | ||
1160 | struct super_type { | |
0cd17fec CW |
1161 | char *name; |
1162 | struct module *owner; | |
c6563a8c N |
1163 | int (*load_super)(struct md_rdev *rdev, |
1164 | struct md_rdev *refdev, | |
0cd17fec | 1165 | int minor_version); |
c6563a8c N |
1166 | int (*validate_super)(struct mddev *mddev, |
1167 | struct md_rdev *rdev); | |
1168 | void (*sync_super)(struct mddev *mddev, | |
1169 | struct md_rdev *rdev); | |
3cb03002 | 1170 | unsigned long long (*rdev_size_change)(struct md_rdev *rdev, |
15f4a5fd | 1171 | sector_t num_sectors); |
c6563a8c N |
1172 | int (*allow_new_offset)(struct md_rdev *rdev, |
1173 | unsigned long long new_offset); | |
1da177e4 LT |
1174 | }; |
1175 | ||
0894cc30 AN |
1176 | /* |
1177 | * Check that the given mddev has no bitmap. | |
1178 | * | |
1179 | * This function is called from the run method of all personalities that do not | |
1180 | * support bitmaps. It prints an error message and returns non-zero if mddev | |
1181 | * has a bitmap. Otherwise, it returns 0. | |
1182 | * | |
1183 | */ | |
fd01b88c | 1184 | int md_check_no_bitmap(struct mddev *mddev) |
0894cc30 | 1185 | { |
c3d9714e | 1186 | if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset) |
0894cc30 | 1187 | return 0; |
9d48739e | 1188 | pr_warn("%s: bitmaps are not supported for %s\n", |
0894cc30 AN |
1189 | mdname(mddev), mddev->pers->name); |
1190 | return 1; | |
1191 | } | |
1192 | EXPORT_SYMBOL(md_check_no_bitmap); | |
1193 | ||
1da177e4 | 1194 | /* |
f72ffdd6 | 1195 | * load_super for 0.90.0 |
1da177e4 | 1196 | */ |
3cb03002 | 1197 | static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1198 | { |
1199 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
1200 | mdp_super_t *sb; | |
1201 | int ret; | |
228fc7d7 | 1202 | bool spare_disk = true; |
1da177e4 LT |
1203 | |
1204 | /* | |
0f420358 | 1205 | * Calculate the position of the superblock (512byte sectors), |
1da177e4 LT |
1206 | * it's at the end of the disk. |
1207 | * | |
1208 | * It also happens to be a multiple of 4Kb. | |
1209 | */ | |
57b2caa3 | 1210 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 1211 | |
0002b271 | 1212 | ret = read_disk_sb(rdev, MD_SB_BYTES); |
9d48739e N |
1213 | if (ret) |
1214 | return ret; | |
1da177e4 LT |
1215 | |
1216 | ret = -EINVAL; | |
1217 | ||
1218 | bdevname(rdev->bdev, b); | |
65a06f06 | 1219 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1220 | |
1221 | if (sb->md_magic != MD_SB_MAGIC) { | |
9d48739e | 1222 | pr_warn("md: invalid raid superblock magic on %s\n", b); |
1da177e4 LT |
1223 | goto abort; |
1224 | } | |
1225 | ||
1226 | if (sb->major_version != 0 || | |
f6705578 N |
1227 | sb->minor_version < 90 || |
1228 | sb->minor_version > 91) { | |
9d48739e N |
1229 | pr_warn("Bad version number %d.%d on %s\n", |
1230 | sb->major_version, sb->minor_version, b); | |
1da177e4 LT |
1231 | goto abort; |
1232 | } | |
1233 | ||
1234 | if (sb->raid_disks <= 0) | |
1235 | goto abort; | |
1236 | ||
4d167f09 | 1237 | if (md_csum_fold(calc_sb_csum(sb)) != md_csum_fold(sb->sb_csum)) { |
9d48739e | 1238 | pr_warn("md: invalid superblock checksum on %s\n", b); |
1da177e4 LT |
1239 | goto abort; |
1240 | } | |
1241 | ||
1242 | rdev->preferred_minor = sb->md_minor; | |
1243 | rdev->data_offset = 0; | |
c6563a8c | 1244 | rdev->new_data_offset = 0; |
0002b271 | 1245 | rdev->sb_size = MD_SB_BYTES; |
9f2f3830 | 1246 | rdev->badblocks.shift = -1; |
1da177e4 LT |
1247 | |
1248 | if (sb->level == LEVEL_MULTIPATH) | |
1249 | rdev->desc_nr = -1; | |
1250 | else | |
1251 | rdev->desc_nr = sb->this_disk.number; | |
1252 | ||
228fc7d7 YY |
1253 | /* not spare disk, or LEVEL_MULTIPATH */ |
1254 | if (sb->level == LEVEL_MULTIPATH || | |
1255 | (rdev->desc_nr >= 0 && | |
3b7436cc | 1256 | rdev->desc_nr < MD_SB_DISKS && |
228fc7d7 YY |
1257 | sb->disks[rdev->desc_nr].state & |
1258 | ((1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE)))) | |
1259 | spare_disk = false; | |
1260 | ||
9a7b2b0f | 1261 | if (!refdev) { |
228fc7d7 | 1262 | if (!spare_disk) |
6a5cb53a YY |
1263 | ret = 1; |
1264 | else | |
1265 | ret = 0; | |
9a7b2b0f | 1266 | } else { |
1da177e4 | 1267 | __u64 ev1, ev2; |
65a06f06 | 1268 | mdp_super_t *refsb = page_address(refdev->sb_page); |
e6fd2093 | 1269 | if (!md_uuid_equal(refsb, sb)) { |
9d48739e | 1270 | pr_warn("md: %s has different UUID to %s\n", |
1da177e4 LT |
1271 | b, bdevname(refdev->bdev,b2)); |
1272 | goto abort; | |
1273 | } | |
e6fd2093 | 1274 | if (!md_sb_equal(refsb, sb)) { |
9d48739e N |
1275 | pr_warn("md: %s has same UUID but different superblock to %s\n", |
1276 | b, bdevname(refdev->bdev, b2)); | |
1da177e4 LT |
1277 | goto abort; |
1278 | } | |
1279 | ev1 = md_event(sb); | |
1280 | ev2 = md_event(refsb); | |
6a5cb53a | 1281 | |
228fc7d7 | 1282 | if (!spare_disk && ev1 > ev2) |
1da177e4 | 1283 | ret = 1; |
f72ffdd6 | 1284 | else |
1da177e4 LT |
1285 | ret = 0; |
1286 | } | |
8190e754 | 1287 | rdev->sectors = rdev->sb_start; |
667a5313 N |
1288 | /* Limit to 4TB as metadata cannot record more than that. |
1289 | * (not needed for Linear and RAID0 as metadata doesn't | |
1290 | * record this size) | |
1291 | */ | |
72deb455 | 1292 | if ((u64)rdev->sectors >= (2ULL << 32) && sb->level >= 1) |
3312c951 | 1293 | rdev->sectors = (sector_t)(2ULL << 32) - 2; |
1da177e4 | 1294 | |
27a7b260 | 1295 | if (rdev->sectors < ((sector_t)sb->size) * 2 && sb->level >= 1) |
2bf071bf N |
1296 | /* "this cannot possibly happen" ... */ |
1297 | ret = -EINVAL; | |
1298 | ||
1da177e4 LT |
1299 | abort: |
1300 | return ret; | |
1301 | } | |
1302 | ||
1303 | /* | |
1304 | * validate_super for 0.90.0 | |
1305 | */ | |
fd01b88c | 1306 | static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1307 | { |
1308 | mdp_disk_t *desc; | |
65a06f06 | 1309 | mdp_super_t *sb = page_address(rdev->sb_page); |
07d84d10 | 1310 | __u64 ev1 = md_event(sb); |
1da177e4 | 1311 | |
41158c7e | 1312 | rdev->raid_disk = -1; |
c5d79adb N |
1313 | clear_bit(Faulty, &rdev->flags); |
1314 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1315 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1316 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1317 | |
1da177e4 LT |
1318 | if (mddev->raid_disks == 0) { |
1319 | mddev->major_version = 0; | |
1320 | mddev->minor_version = sb->minor_version; | |
1321 | mddev->patch_version = sb->patch_version; | |
e691063a | 1322 | mddev->external = 0; |
9d8f0363 | 1323 | mddev->chunk_sectors = sb->chunk_size >> 9; |
1da177e4 LT |
1324 | mddev->ctime = sb->ctime; |
1325 | mddev->utime = sb->utime; | |
1326 | mddev->level = sb->level; | |
d9d166c2 | 1327 | mddev->clevel[0] = 0; |
1da177e4 LT |
1328 | mddev->layout = sb->layout; |
1329 | mddev->raid_disks = sb->raid_disks; | |
27a7b260 | 1330 | mddev->dev_sectors = ((sector_t)sb->size) * 2; |
07d84d10 | 1331 | mddev->events = ev1; |
c3d9714e | 1332 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1333 | mddev->bitmap_info.space = 0; |
1334 | /* bitmap can use 60 K after the 4K superblocks */ | |
c3d9714e | 1335 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 1336 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
2c810cdd | 1337 | mddev->reshape_backwards = 0; |
1da177e4 | 1338 | |
f6705578 N |
1339 | if (mddev->minor_version >= 91) { |
1340 | mddev->reshape_position = sb->reshape_position; | |
1341 | mddev->delta_disks = sb->delta_disks; | |
1342 | mddev->new_level = sb->new_level; | |
1343 | mddev->new_layout = sb->new_layout; | |
664e7c41 | 1344 | mddev->new_chunk_sectors = sb->new_chunk >> 9; |
2c810cdd N |
1345 | if (mddev->delta_disks < 0) |
1346 | mddev->reshape_backwards = 1; | |
f6705578 N |
1347 | } else { |
1348 | mddev->reshape_position = MaxSector; | |
1349 | mddev->delta_disks = 0; | |
1350 | mddev->new_level = mddev->level; | |
1351 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1352 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 | 1353 | } |
33f2c35a N |
1354 | if (mddev->level == 0) |
1355 | mddev->layout = -1; | |
f6705578 | 1356 | |
1da177e4 LT |
1357 | if (sb->state & (1<<MD_SB_CLEAN)) |
1358 | mddev->recovery_cp = MaxSector; | |
1359 | else { | |
f72ffdd6 | 1360 | if (sb->events_hi == sb->cp_events_hi && |
1da177e4 LT |
1361 | sb->events_lo == sb->cp_events_lo) { |
1362 | mddev->recovery_cp = sb->recovery_cp; | |
1363 | } else | |
1364 | mddev->recovery_cp = 0; | |
1365 | } | |
1366 | ||
1367 | memcpy(mddev->uuid+0, &sb->set_uuid0, 4); | |
1368 | memcpy(mddev->uuid+4, &sb->set_uuid1, 4); | |
1369 | memcpy(mddev->uuid+8, &sb->set_uuid2, 4); | |
1370 | memcpy(mddev->uuid+12,&sb->set_uuid3, 4); | |
1371 | ||
1372 | mddev->max_disks = MD_SB_DISKS; | |
a654b9d8 N |
1373 | |
1374 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT) && | |
6409bb05 | 1375 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1376 | mddev->bitmap_info.offset = |
1377 | mddev->bitmap_info.default_offset; | |
6409bb05 | 1378 | mddev->bitmap_info.space = |
c9ad020f | 1379 | mddev->bitmap_info.default_space; |
6409bb05 | 1380 | } |
a654b9d8 | 1381 | |
41158c7e | 1382 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1383 | /* Insist on good event counter while assembling, except |
1384 | * for spares (which don't need an event count) */ | |
1da177e4 | 1385 | ++ev1; |
be6800a7 N |
1386 | if (sb->disks[rdev->desc_nr].state & ( |
1387 | (1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE))) | |
f72ffdd6 | 1388 | if (ev1 < mddev->events) |
be6800a7 | 1389 | return -EINVAL; |
41158c7e N |
1390 | } else if (mddev->bitmap) { |
1391 | /* if adding to array with a bitmap, then we can accept an | |
1392 | * older device ... but not too old. | |
1393 | */ | |
41158c7e N |
1394 | if (ev1 < mddev->bitmap->events_cleared) |
1395 | return 0; | |
8313b8e5 N |
1396 | if (ev1 < mddev->events) |
1397 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1398 | } else { |
1399 | if (ev1 < mddev->events) | |
1400 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1401 | return 0; | |
1402 | } | |
41158c7e | 1403 | |
1da177e4 | 1404 | if (mddev->level != LEVEL_MULTIPATH) { |
1da177e4 LT |
1405 | desc = sb->disks + rdev->desc_nr; |
1406 | ||
1407 | if (desc->state & (1<<MD_DISK_FAULTY)) | |
b2d444d7 | 1408 | set_bit(Faulty, &rdev->flags); |
7c7546cc N |
1409 | else if (desc->state & (1<<MD_DISK_SYNC) /* && |
1410 | desc->raid_disk < mddev->raid_disks */) { | |
b2d444d7 | 1411 | set_bit(In_sync, &rdev->flags); |
1da177e4 | 1412 | rdev->raid_disk = desc->raid_disk; |
f466722c | 1413 | rdev->saved_raid_disk = desc->raid_disk; |
0261cd9f N |
1414 | } else if (desc->state & (1<<MD_DISK_ACTIVE)) { |
1415 | /* active but not in sync implies recovery up to | |
1416 | * reshape position. We don't know exactly where | |
1417 | * that is, so set to zero for now */ | |
1418 | if (mddev->minor_version >= 91) { | |
1419 | rdev->recovery_offset = 0; | |
1420 | rdev->raid_disk = desc->raid_disk; | |
1421 | } | |
1da177e4 | 1422 | } |
8ddf9efe N |
1423 | if (desc->state & (1<<MD_DISK_WRITEMOSTLY)) |
1424 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1425 | if (desc->state & (1<<MD_DISK_FAILFAST)) |
1426 | set_bit(FailFast, &rdev->flags); | |
41158c7e | 1427 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1428 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1429 | return 0; |
1430 | } | |
1431 | ||
1432 | /* | |
1433 | * sync_super for 0.90.0 | |
1434 | */ | |
fd01b88c | 1435 | static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1436 | { |
1437 | mdp_super_t *sb; | |
3cb03002 | 1438 | struct md_rdev *rdev2; |
1da177e4 | 1439 | int next_spare = mddev->raid_disks; |
19133a42 | 1440 | |
1da177e4 LT |
1441 | /* make rdev->sb match mddev data.. |
1442 | * | |
1443 | * 1/ zero out disks | |
1444 | * 2/ Add info for each disk, keeping track of highest desc_nr (next_spare); | |
1445 | * 3/ any empty disks < next_spare become removed | |
1446 | * | |
1447 | * disks[0] gets initialised to REMOVED because | |
1448 | * we cannot be sure from other fields if it has | |
1449 | * been initialised or not. | |
1450 | */ | |
1451 | int i; | |
1452 | int active=0, working=0,failed=0,spare=0,nr_disks=0; | |
1453 | ||
61181565 N |
1454 | rdev->sb_size = MD_SB_BYTES; |
1455 | ||
65a06f06 | 1456 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1457 | |
1458 | memset(sb, 0, sizeof(*sb)); | |
1459 | ||
1460 | sb->md_magic = MD_SB_MAGIC; | |
1461 | sb->major_version = mddev->major_version; | |
1da177e4 LT |
1462 | sb->patch_version = mddev->patch_version; |
1463 | sb->gvalid_words = 0; /* ignored */ | |
1464 | memcpy(&sb->set_uuid0, mddev->uuid+0, 4); | |
1465 | memcpy(&sb->set_uuid1, mddev->uuid+4, 4); | |
1466 | memcpy(&sb->set_uuid2, mddev->uuid+8, 4); | |
1467 | memcpy(&sb->set_uuid3, mddev->uuid+12,4); | |
1468 | ||
9ebc6ef1 | 1469 | sb->ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 1470 | sb->level = mddev->level; |
58c0fed4 | 1471 | sb->size = mddev->dev_sectors / 2; |
1da177e4 LT |
1472 | sb->raid_disks = mddev->raid_disks; |
1473 | sb->md_minor = mddev->md_minor; | |
e691063a | 1474 | sb->not_persistent = 0; |
9ebc6ef1 | 1475 | sb->utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
1476 | sb->state = 0; |
1477 | sb->events_hi = (mddev->events>>32); | |
1478 | sb->events_lo = (u32)mddev->events; | |
1479 | ||
f6705578 N |
1480 | if (mddev->reshape_position == MaxSector) |
1481 | sb->minor_version = 90; | |
1482 | else { | |
1483 | sb->minor_version = 91; | |
1484 | sb->reshape_position = mddev->reshape_position; | |
1485 | sb->new_level = mddev->new_level; | |
1486 | sb->delta_disks = mddev->delta_disks; | |
1487 | sb->new_layout = mddev->new_layout; | |
664e7c41 | 1488 | sb->new_chunk = mddev->new_chunk_sectors << 9; |
f6705578 N |
1489 | } |
1490 | mddev->minor_version = sb->minor_version; | |
1da177e4 LT |
1491 | if (mddev->in_sync) |
1492 | { | |
1493 | sb->recovery_cp = mddev->recovery_cp; | |
1494 | sb->cp_events_hi = (mddev->events>>32); | |
1495 | sb->cp_events_lo = (u32)mddev->events; | |
1496 | if (mddev->recovery_cp == MaxSector) | |
1497 | sb->state = (1<< MD_SB_CLEAN); | |
1498 | } else | |
1499 | sb->recovery_cp = 0; | |
1500 | ||
1501 | sb->layout = mddev->layout; | |
9d8f0363 | 1502 | sb->chunk_size = mddev->chunk_sectors << 9; |
1da177e4 | 1503 | |
c3d9714e | 1504 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) |
a654b9d8 N |
1505 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); |
1506 | ||
1da177e4 | 1507 | sb->disks[0].state = (1<<MD_DISK_REMOVED); |
dafb20fa | 1508 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1509 | mdp_disk_t *d; |
86e6ffdd | 1510 | int desc_nr; |
0261cd9f N |
1511 | int is_active = test_bit(In_sync, &rdev2->flags); |
1512 | ||
1513 | if (rdev2->raid_disk >= 0 && | |
1514 | sb->minor_version >= 91) | |
1515 | /* we have nowhere to store the recovery_offset, | |
1516 | * but if it is not below the reshape_position, | |
1517 | * we can piggy-back on that. | |
1518 | */ | |
1519 | is_active = 1; | |
1520 | if (rdev2->raid_disk < 0 || | |
1521 | test_bit(Faulty, &rdev2->flags)) | |
1522 | is_active = 0; | |
1523 | if (is_active) | |
86e6ffdd | 1524 | desc_nr = rdev2->raid_disk; |
1da177e4 | 1525 | else |
86e6ffdd | 1526 | desc_nr = next_spare++; |
19133a42 | 1527 | rdev2->desc_nr = desc_nr; |
1da177e4 LT |
1528 | d = &sb->disks[rdev2->desc_nr]; |
1529 | nr_disks++; | |
1530 | d->number = rdev2->desc_nr; | |
1531 | d->major = MAJOR(rdev2->bdev->bd_dev); | |
1532 | d->minor = MINOR(rdev2->bdev->bd_dev); | |
0261cd9f | 1533 | if (is_active) |
1da177e4 LT |
1534 | d->raid_disk = rdev2->raid_disk; |
1535 | else | |
1536 | d->raid_disk = rdev2->desc_nr; /* compatibility */ | |
1be7892f | 1537 | if (test_bit(Faulty, &rdev2->flags)) |
1da177e4 | 1538 | d->state = (1<<MD_DISK_FAULTY); |
0261cd9f | 1539 | else if (is_active) { |
1da177e4 | 1540 | d->state = (1<<MD_DISK_ACTIVE); |
0261cd9f N |
1541 | if (test_bit(In_sync, &rdev2->flags)) |
1542 | d->state |= (1<<MD_DISK_SYNC); | |
1da177e4 LT |
1543 | active++; |
1544 | working++; | |
1545 | } else { | |
1546 | d->state = 0; | |
1547 | spare++; | |
1548 | working++; | |
1549 | } | |
8ddf9efe N |
1550 | if (test_bit(WriteMostly, &rdev2->flags)) |
1551 | d->state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
1552 | if (test_bit(FailFast, &rdev2->flags)) |
1553 | d->state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 | 1554 | } |
1da177e4 LT |
1555 | /* now set the "removed" and "faulty" bits on any missing devices */ |
1556 | for (i=0 ; i < mddev->raid_disks ; i++) { | |
1557 | mdp_disk_t *d = &sb->disks[i]; | |
1558 | if (d->state == 0 && d->number == 0) { | |
1559 | d->number = i; | |
1560 | d->raid_disk = i; | |
1561 | d->state = (1<<MD_DISK_REMOVED); | |
1562 | d->state |= (1<<MD_DISK_FAULTY); | |
1563 | failed++; | |
1564 | } | |
1565 | } | |
1566 | sb->nr_disks = nr_disks; | |
1567 | sb->active_disks = active; | |
1568 | sb->working_disks = working; | |
1569 | sb->failed_disks = failed; | |
1570 | sb->spare_disks = spare; | |
1571 | ||
1572 | sb->this_disk = sb->disks[rdev->desc_nr]; | |
1573 | sb->sb_csum = calc_sb_csum(sb); | |
1574 | } | |
1575 | ||
0cd17fec CW |
1576 | /* |
1577 | * rdev_size_change for 0.90.0 | |
1578 | */ | |
1579 | static unsigned long long | |
3cb03002 | 1580 | super_90_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec | 1581 | { |
58c0fed4 | 1582 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1583 | return 0; /* component must fit device */ |
c3d9714e | 1584 | if (rdev->mddev->bitmap_info.offset) |
0cd17fec | 1585 | return 0; /* can't move bitmap */ |
57b2caa3 | 1586 | rdev->sb_start = calc_dev_sboffset(rdev); |
15f4a5fd AN |
1587 | if (!num_sectors || num_sectors > rdev->sb_start) |
1588 | num_sectors = rdev->sb_start; | |
27a7b260 N |
1589 | /* Limit to 4TB as metadata cannot record more than that. |
1590 | * 4TB == 2^32 KB, or 2*2^32 sectors. | |
1591 | */ | |
72deb455 | 1592 | if ((u64)num_sectors >= (2ULL << 32) && rdev->mddev->level >= 1) |
3312c951 | 1593 | num_sectors = (sector_t)(2ULL << 32) - 2; |
46533ff7 N |
1594 | do { |
1595 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
0cd17fec | 1596 | rdev->sb_page); |
46533ff7 | 1597 | } while (md_super_wait(rdev->mddev) < 0); |
c26a44ed | 1598 | return num_sectors; |
0cd17fec CW |
1599 | } |
1600 | ||
c6563a8c N |
1601 | static int |
1602 | super_90_allow_new_offset(struct md_rdev *rdev, unsigned long long new_offset) | |
1603 | { | |
1604 | /* non-zero offset changes not possible with v0.90 */ | |
1605 | return new_offset == 0; | |
1606 | } | |
0cd17fec | 1607 | |
1da177e4 LT |
1608 | /* |
1609 | * version 1 superblock | |
1610 | */ | |
1611 | ||
f72ffdd6 | 1612 | static __le32 calc_sb_1_csum(struct mdp_superblock_1 *sb) |
1da177e4 | 1613 | { |
1c05b4bc N |
1614 | __le32 disk_csum; |
1615 | u32 csum; | |
1da177e4 LT |
1616 | unsigned long long newcsum; |
1617 | int size = 256 + le32_to_cpu(sb->max_dev)*2; | |
1c05b4bc | 1618 | __le32 *isuper = (__le32*)sb; |
1da177e4 LT |
1619 | |
1620 | disk_csum = sb->sb_csum; | |
1621 | sb->sb_csum = 0; | |
1622 | newcsum = 0; | |
1f3c9907 | 1623 | for (; size >= 4; size -= 4) |
1da177e4 LT |
1624 | newcsum += le32_to_cpu(*isuper++); |
1625 | ||
1626 | if (size == 2) | |
1c05b4bc | 1627 | newcsum += le16_to_cpu(*(__le16*) isuper); |
1da177e4 LT |
1628 | |
1629 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
1630 | sb->sb_csum = disk_csum; | |
1631 | return cpu_to_le32(csum); | |
1632 | } | |
1633 | ||
3cb03002 | 1634 | static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1635 | { |
1636 | struct mdp_superblock_1 *sb; | |
1637 | int ret; | |
0f420358 | 1638 | sector_t sb_start; |
c6563a8c | 1639 | sector_t sectors; |
1da177e4 | 1640 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; |
0002b271 | 1641 | int bmask; |
228fc7d7 | 1642 | bool spare_disk = true; |
1da177e4 LT |
1643 | |
1644 | /* | |
0f420358 | 1645 | * Calculate the position of the superblock in 512byte sectors. |
1da177e4 LT |
1646 | * It is always aligned to a 4K boundary and |
1647 | * depeding on minor_version, it can be: | |
1648 | * 0: At least 8K, but less than 12K, from end of device | |
1649 | * 1: At start of device | |
1650 | * 2: 4K from start of device. | |
1651 | */ | |
1652 | switch(minor_version) { | |
1653 | case 0: | |
77304d2a | 1654 | sb_start = i_size_read(rdev->bdev->bd_inode) >> 9; |
0f420358 AN |
1655 | sb_start -= 8*2; |
1656 | sb_start &= ~(sector_t)(4*2-1); | |
1da177e4 LT |
1657 | break; |
1658 | case 1: | |
0f420358 | 1659 | sb_start = 0; |
1da177e4 LT |
1660 | break; |
1661 | case 2: | |
0f420358 | 1662 | sb_start = 8; |
1da177e4 LT |
1663 | break; |
1664 | default: | |
1665 | return -EINVAL; | |
1666 | } | |
0f420358 | 1667 | rdev->sb_start = sb_start; |
1da177e4 | 1668 | |
0002b271 N |
1669 | /* superblock is rarely larger than 1K, but it can be larger, |
1670 | * and it is safe to read 4k, so we do that | |
1671 | */ | |
1672 | ret = read_disk_sb(rdev, 4096); | |
1da177e4 LT |
1673 | if (ret) return ret; |
1674 | ||
65a06f06 | 1675 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1676 | |
1677 | if (sb->magic != cpu_to_le32(MD_SB_MAGIC) || | |
1678 | sb->major_version != cpu_to_le32(1) || | |
1679 | le32_to_cpu(sb->max_dev) > (4096-256)/2 || | |
0f420358 | 1680 | le64_to_cpu(sb->super_offset) != rdev->sb_start || |
71c0805c | 1681 | (le32_to_cpu(sb->feature_map) & ~MD_FEATURE_ALL) != 0) |
1da177e4 LT |
1682 | return -EINVAL; |
1683 | ||
1684 | if (calc_sb_1_csum(sb) != sb->sb_csum) { | |
9d48739e | 1685 | pr_warn("md: invalid superblock checksum on %s\n", |
1da177e4 LT |
1686 | bdevname(rdev->bdev,b)); |
1687 | return -EINVAL; | |
1688 | } | |
1689 | if (le64_to_cpu(sb->data_size) < 10) { | |
9d48739e N |
1690 | pr_warn("md: data_size too small on %s\n", |
1691 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
1692 | return -EINVAL; |
1693 | } | |
c6563a8c N |
1694 | if (sb->pad0 || |
1695 | sb->pad3[0] || | |
1696 | memcmp(sb->pad3, sb->pad3+1, sizeof(sb->pad3) - sizeof(sb->pad3[1]))) | |
1697 | /* Some padding is non-zero, might be a new feature */ | |
1698 | return -EINVAL; | |
e11e93fa | 1699 | |
1da177e4 LT |
1700 | rdev->preferred_minor = 0xffff; |
1701 | rdev->data_offset = le64_to_cpu(sb->data_offset); | |
c6563a8c N |
1702 | rdev->new_data_offset = rdev->data_offset; |
1703 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE) && | |
1704 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) | |
1705 | rdev->new_data_offset += (s32)le32_to_cpu(sb->new_offset); | |
4dbcdc75 | 1706 | atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read)); |
1da177e4 | 1707 | |
0002b271 | 1708 | rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256; |
e1defc4f | 1709 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; |
0002b271 | 1710 | if (rdev->sb_size & bmask) |
a1801f85 N |
1711 | rdev->sb_size = (rdev->sb_size | bmask) + 1; |
1712 | ||
1713 | if (minor_version | |
0f420358 | 1714 | && rdev->data_offset < sb_start + (rdev->sb_size/512)) |
a1801f85 | 1715 | return -EINVAL; |
c6563a8c N |
1716 | if (minor_version |
1717 | && rdev->new_data_offset < sb_start + (rdev->sb_size/512)) | |
1718 | return -EINVAL; | |
0002b271 | 1719 | |
31b65a0d N |
1720 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH)) |
1721 | rdev->desc_nr = -1; | |
1722 | else | |
1723 | rdev->desc_nr = le32_to_cpu(sb->dev_number); | |
1724 | ||
2699b672 N |
1725 | if (!rdev->bb_page) { |
1726 | rdev->bb_page = alloc_page(GFP_KERNEL); | |
1727 | if (!rdev->bb_page) | |
1728 | return -ENOMEM; | |
1729 | } | |
1730 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BAD_BLOCKS) && | |
1731 | rdev->badblocks.count == 0) { | |
1732 | /* need to load the bad block list. | |
1733 | * Currently we limit it to one page. | |
1734 | */ | |
1735 | s32 offset; | |
1736 | sector_t bb_sector; | |
00485d09 | 1737 | __le64 *bbp; |
2699b672 N |
1738 | int i; |
1739 | int sectors = le16_to_cpu(sb->bblog_size); | |
1740 | if (sectors > (PAGE_SIZE / 512)) | |
1741 | return -EINVAL; | |
1742 | offset = le32_to_cpu(sb->bblog_offset); | |
1743 | if (offset == 0) | |
1744 | return -EINVAL; | |
1745 | bb_sector = (long long)offset; | |
1746 | if (!sync_page_io(rdev, bb_sector, sectors << 9, | |
796a5cf0 | 1747 | rdev->bb_page, REQ_OP_READ, 0, true)) |
2699b672 | 1748 | return -EIO; |
00485d09 | 1749 | bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
1750 | rdev->badblocks.shift = sb->bblog_shift; |
1751 | for (i = 0 ; i < (sectors << (9-3)) ; i++, bbp++) { | |
1752 | u64 bb = le64_to_cpu(*bbp); | |
1753 | int count = bb & (0x3ff); | |
1754 | u64 sector = bb >> 10; | |
1755 | sector <<= sb->bblog_shift; | |
1756 | count <<= sb->bblog_shift; | |
1757 | if (bb + 1 == 0) | |
1758 | break; | |
fc974ee2 | 1759 | if (badblocks_set(&rdev->badblocks, sector, count, 1)) |
2699b672 N |
1760 | return -EINVAL; |
1761 | } | |
486adf72 N |
1762 | } else if (sb->bblog_offset != 0) |
1763 | rdev->badblocks.shift = 0; | |
2699b672 | 1764 | |
ddc08823 PB |
1765 | if ((le32_to_cpu(sb->feature_map) & |
1766 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS))) { | |
ea0213e0 AP |
1767 | rdev->ppl.offset = (__s16)le16_to_cpu(sb->ppl.offset); |
1768 | rdev->ppl.size = le16_to_cpu(sb->ppl.size); | |
1769 | rdev->ppl.sector = rdev->sb_start + rdev->ppl.offset; | |
1770 | } | |
1771 | ||
33f2c35a N |
1772 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT) && |
1773 | sb->level != 0) | |
1774 | return -EINVAL; | |
1775 | ||
228fc7d7 YY |
1776 | /* not spare disk, or LEVEL_MULTIPATH */ |
1777 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH) || | |
1778 | (rdev->desc_nr >= 0 && | |
1779 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
1780 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || | |
1781 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL))) | |
1782 | spare_disk = false; | |
6a5cb53a | 1783 | |
9a7b2b0f | 1784 | if (!refdev) { |
228fc7d7 | 1785 | if (!spare_disk) |
6a5cb53a YY |
1786 | ret = 1; |
1787 | else | |
1788 | ret = 0; | |
9a7b2b0f | 1789 | } else { |
1da177e4 | 1790 | __u64 ev1, ev2; |
65a06f06 | 1791 | struct mdp_superblock_1 *refsb = page_address(refdev->sb_page); |
1da177e4 LT |
1792 | |
1793 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16) != 0 || | |
1794 | sb->level != refsb->level || | |
1795 | sb->layout != refsb->layout || | |
1796 | sb->chunksize != refsb->chunksize) { | |
9d48739e | 1797 | pr_warn("md: %s has strangely different superblock to %s\n", |
1da177e4 LT |
1798 | bdevname(rdev->bdev,b), |
1799 | bdevname(refdev->bdev,b2)); | |
1800 | return -EINVAL; | |
1801 | } | |
1802 | ev1 = le64_to_cpu(sb->events); | |
1803 | ev2 = le64_to_cpu(refsb->events); | |
1804 | ||
228fc7d7 | 1805 | if (!spare_disk && ev1 > ev2) |
8ed75463 N |
1806 | ret = 1; |
1807 | else | |
1808 | ret = 0; | |
1da177e4 | 1809 | } |
c6563a8c N |
1810 | if (minor_version) { |
1811 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9); | |
1812 | sectors -= rdev->data_offset; | |
1813 | } else | |
1814 | sectors = rdev->sb_start; | |
1815 | if (sectors < le64_to_cpu(sb->data_size)) | |
1da177e4 | 1816 | return -EINVAL; |
dd8ac336 | 1817 | rdev->sectors = le64_to_cpu(sb->data_size); |
8ed75463 | 1818 | return ret; |
1da177e4 LT |
1819 | } |
1820 | ||
fd01b88c | 1821 | static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 1822 | { |
65a06f06 | 1823 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
07d84d10 | 1824 | __u64 ev1 = le64_to_cpu(sb->events); |
1da177e4 | 1825 | |
41158c7e | 1826 | rdev->raid_disk = -1; |
c5d79adb N |
1827 | clear_bit(Faulty, &rdev->flags); |
1828 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1829 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1830 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1831 | |
1da177e4 LT |
1832 | if (mddev->raid_disks == 0) { |
1833 | mddev->major_version = 1; | |
1834 | mddev->patch_version = 0; | |
e691063a | 1835 | mddev->external = 0; |
9d8f0363 | 1836 | mddev->chunk_sectors = le32_to_cpu(sb->chunksize); |
9ebc6ef1 DD |
1837 | mddev->ctime = le64_to_cpu(sb->ctime); |
1838 | mddev->utime = le64_to_cpu(sb->utime); | |
1da177e4 | 1839 | mddev->level = le32_to_cpu(sb->level); |
d9d166c2 | 1840 | mddev->clevel[0] = 0; |
1da177e4 LT |
1841 | mddev->layout = le32_to_cpu(sb->layout); |
1842 | mddev->raid_disks = le32_to_cpu(sb->raid_disks); | |
58c0fed4 | 1843 | mddev->dev_sectors = le64_to_cpu(sb->size); |
07d84d10 | 1844 | mddev->events = ev1; |
c3d9714e | 1845 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1846 | mddev->bitmap_info.space = 0; |
1847 | /* Default location for bitmap is 1K after superblock | |
1848 | * using 3K - total of 4K | |
1849 | */ | |
c3d9714e | 1850 | mddev->bitmap_info.default_offset = 1024 >> 9; |
6409bb05 | 1851 | mddev->bitmap_info.default_space = (4096-1024) >> 9; |
2c810cdd N |
1852 | mddev->reshape_backwards = 0; |
1853 | ||
1da177e4 LT |
1854 | mddev->recovery_cp = le64_to_cpu(sb->resync_offset); |
1855 | memcpy(mddev->uuid, sb->set_uuid, 16); | |
1856 | ||
1857 | mddev->max_disks = (4096-256)/2; | |
a654b9d8 | 1858 | |
71c0805c | 1859 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) && |
6409bb05 | 1860 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1861 | mddev->bitmap_info.offset = |
1862 | (__s32)le32_to_cpu(sb->bitmap_offset); | |
6409bb05 N |
1863 | /* Metadata doesn't record how much space is available. |
1864 | * For 1.0, we assume we can use up to the superblock | |
1865 | * if before, else to 4K beyond superblock. | |
1866 | * For others, assume no change is possible. | |
1867 | */ | |
1868 | if (mddev->minor_version > 0) | |
1869 | mddev->bitmap_info.space = 0; | |
1870 | else if (mddev->bitmap_info.offset > 0) | |
1871 | mddev->bitmap_info.space = | |
1872 | 8 - mddev->bitmap_info.offset; | |
1873 | else | |
1874 | mddev->bitmap_info.space = | |
1875 | -mddev->bitmap_info.offset; | |
1876 | } | |
e11e93fa | 1877 | |
f6705578 N |
1878 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { |
1879 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); | |
1880 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); | |
1881 | mddev->new_level = le32_to_cpu(sb->new_level); | |
1882 | mddev->new_layout = le32_to_cpu(sb->new_layout); | |
664e7c41 | 1883 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_chunk); |
2c810cdd N |
1884 | if (mddev->delta_disks < 0 || |
1885 | (mddev->delta_disks == 0 && | |
1886 | (le32_to_cpu(sb->feature_map) | |
1887 | & MD_FEATURE_RESHAPE_BACKWARDS))) | |
1888 | mddev->reshape_backwards = 1; | |
f6705578 N |
1889 | } else { |
1890 | mddev->reshape_position = MaxSector; | |
1891 | mddev->delta_disks = 0; | |
1892 | mddev->new_level = mddev->level; | |
1893 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1894 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1895 | } |
1896 | ||
33f2c35a N |
1897 | if (mddev->level == 0 && |
1898 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT)) | |
1899 | mddev->layout = -1; | |
1900 | ||
486b0f7b | 1901 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL) |
a62ab49e | 1902 | set_bit(MD_HAS_JOURNAL, &mddev->flags); |
ea0213e0 | 1903 | |
ddc08823 PB |
1904 | if (le32_to_cpu(sb->feature_map) & |
1905 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS)) { | |
ea0213e0 AP |
1906 | if (le32_to_cpu(sb->feature_map) & |
1907 | (MD_FEATURE_BITMAP_OFFSET | MD_FEATURE_JOURNAL)) | |
1908 | return -EINVAL; | |
ddc08823 PB |
1909 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_PPL) && |
1910 | (le32_to_cpu(sb->feature_map) & | |
1911 | MD_FEATURE_MULTIPLE_PPLS)) | |
1912 | return -EINVAL; | |
ea0213e0 AP |
1913 | set_bit(MD_HAS_PPL, &mddev->flags); |
1914 | } | |
41158c7e | 1915 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1916 | /* Insist of good event counter while assembling, except for |
1917 | * spares (which don't need an event count) */ | |
1da177e4 | 1918 | ++ev1; |
be6800a7 N |
1919 | if (rdev->desc_nr >= 0 && |
1920 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
a3dfbdaa SL |
1921 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || |
1922 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL)) | |
be6800a7 N |
1923 | if (ev1 < mddev->events) |
1924 | return -EINVAL; | |
41158c7e N |
1925 | } else if (mddev->bitmap) { |
1926 | /* If adding to array with a bitmap, then we can accept an | |
1927 | * older device, but not too old. | |
1928 | */ | |
41158c7e N |
1929 | if (ev1 < mddev->bitmap->events_cleared) |
1930 | return 0; | |
8313b8e5 N |
1931 | if (ev1 < mddev->events) |
1932 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1933 | } else { |
1934 | if (ev1 < mddev->events) | |
1935 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1936 | return 0; | |
1937 | } | |
1da177e4 LT |
1938 | if (mddev->level != LEVEL_MULTIPATH) { |
1939 | int role; | |
3673f305 N |
1940 | if (rdev->desc_nr < 0 || |
1941 | rdev->desc_nr >= le32_to_cpu(sb->max_dev)) { | |
c4d4c91b | 1942 | role = MD_DISK_ROLE_SPARE; |
3673f305 N |
1943 | rdev->desc_nr = -1; |
1944 | } else | |
1945 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
1da177e4 | 1946 | switch(role) { |
c4d4c91b | 1947 | case MD_DISK_ROLE_SPARE: /* spare */ |
1da177e4 | 1948 | break; |
c4d4c91b | 1949 | case MD_DISK_ROLE_FAULTY: /* faulty */ |
b2d444d7 | 1950 | set_bit(Faulty, &rdev->flags); |
1da177e4 | 1951 | break; |
bac624f3 SL |
1952 | case MD_DISK_ROLE_JOURNAL: /* journal device */ |
1953 | if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL)) { | |
1954 | /* journal device without journal feature */ | |
9d48739e | 1955 | pr_warn("md: journal device provided without journal feature, ignoring the device\n"); |
bac624f3 SL |
1956 | return -EINVAL; |
1957 | } | |
1958 | set_bit(Journal, &rdev->flags); | |
3069aa8d | 1959 | rdev->journal_tail = le64_to_cpu(sb->journal_tail); |
9b15603d | 1960 | rdev->raid_disk = 0; |
bac624f3 | 1961 | break; |
1da177e4 | 1962 | default: |
f466722c | 1963 | rdev->saved_raid_disk = role; |
5fd6c1dc | 1964 | if ((le32_to_cpu(sb->feature_map) & |
f466722c | 1965 | MD_FEATURE_RECOVERY_OFFSET)) { |
5fd6c1dc | 1966 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); |
f466722c N |
1967 | if (!(le32_to_cpu(sb->feature_map) & |
1968 | MD_FEATURE_RECOVERY_BITMAP)) | |
1969 | rdev->saved_raid_disk = -1; | |
062f5b2a GJ |
1970 | } else { |
1971 | /* | |
1972 | * If the array is FROZEN, then the device can't | |
1973 | * be in_sync with rest of array. | |
1974 | */ | |
1975 | if (!test_bit(MD_RECOVERY_FROZEN, | |
1976 | &mddev->recovery)) | |
1977 | set_bit(In_sync, &rdev->flags); | |
1978 | } | |
1da177e4 LT |
1979 | rdev->raid_disk = role; |
1980 | break; | |
1981 | } | |
8ddf9efe N |
1982 | if (sb->devflags & WriteMostly1) |
1983 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1984 | if (sb->devflags & FailFast1) |
1985 | set_bit(FailFast, &rdev->flags); | |
2d78f8c4 N |
1986 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) |
1987 | set_bit(Replacement, &rdev->flags); | |
41158c7e | 1988 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1989 | set_bit(In_sync, &rdev->flags); |
41158c7e | 1990 | |
1da177e4 LT |
1991 | return 0; |
1992 | } | |
1993 | ||
fd01b88c | 1994 | static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1995 | { |
1996 | struct mdp_superblock_1 *sb; | |
3cb03002 | 1997 | struct md_rdev *rdev2; |
1da177e4 LT |
1998 | int max_dev, i; |
1999 | /* make rdev->sb match mddev and rdev data. */ | |
2000 | ||
65a06f06 | 2001 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
2002 | |
2003 | sb->feature_map = 0; | |
2004 | sb->pad0 = 0; | |
5fd6c1dc | 2005 | sb->recovery_offset = cpu_to_le64(0); |
1da177e4 LT |
2006 | memset(sb->pad3, 0, sizeof(sb->pad3)); |
2007 | ||
2008 | sb->utime = cpu_to_le64((__u64)mddev->utime); | |
2009 | sb->events = cpu_to_le64(mddev->events); | |
2010 | if (mddev->in_sync) | |
2011 | sb->resync_offset = cpu_to_le64(mddev->recovery_cp); | |
bd18f646 SL |
2012 | else if (test_bit(MD_JOURNAL_CLEAN, &mddev->flags)) |
2013 | sb->resync_offset = cpu_to_le64(MaxSector); | |
1da177e4 LT |
2014 | else |
2015 | sb->resync_offset = cpu_to_le64(0); | |
2016 | ||
1c05b4bc | 2017 | sb->cnt_corrected_read = cpu_to_le32(atomic_read(&rdev->corrected_errors)); |
4dbcdc75 | 2018 | |
f0ca340c | 2019 | sb->raid_disks = cpu_to_le32(mddev->raid_disks); |
58c0fed4 | 2020 | sb->size = cpu_to_le64(mddev->dev_sectors); |
9d8f0363 | 2021 | sb->chunksize = cpu_to_le32(mddev->chunk_sectors); |
62e1e389 N |
2022 | sb->level = cpu_to_le32(mddev->level); |
2023 | sb->layout = cpu_to_le32(mddev->layout); | |
688834e6 N |
2024 | if (test_bit(FailFast, &rdev->flags)) |
2025 | sb->devflags |= FailFast1; | |
2026 | else | |
2027 | sb->devflags &= ~FailFast1; | |
f0ca340c | 2028 | |
aeb9b211 N |
2029 | if (test_bit(WriteMostly, &rdev->flags)) |
2030 | sb->devflags |= WriteMostly1; | |
2031 | else | |
2032 | sb->devflags &= ~WriteMostly1; | |
c6563a8c N |
2033 | sb->data_offset = cpu_to_le64(rdev->data_offset); |
2034 | sb->data_size = cpu_to_le64(rdev->sectors); | |
aeb9b211 | 2035 | |
c3d9714e N |
2036 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) { |
2037 | sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset); | |
71c0805c | 2038 | sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); |
a654b9d8 | 2039 | } |
5fd6c1dc | 2040 | |
f2076e7d | 2041 | if (rdev->raid_disk >= 0 && !test_bit(Journal, &rdev->flags) && |
97e4f42d | 2042 | !test_bit(In_sync, &rdev->flags)) { |
93be75ff N |
2043 | sb->feature_map |= |
2044 | cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET); | |
2045 | sb->recovery_offset = | |
2046 | cpu_to_le64(rdev->recovery_offset); | |
f466722c N |
2047 | if (rdev->saved_raid_disk >= 0 && mddev->bitmap) |
2048 | sb->feature_map |= | |
2049 | cpu_to_le32(MD_FEATURE_RECOVERY_BITMAP); | |
5fd6c1dc | 2050 | } |
3069aa8d SL |
2051 | /* Note: recovery_offset and journal_tail share space */ |
2052 | if (test_bit(Journal, &rdev->flags)) | |
2053 | sb->journal_tail = cpu_to_le64(rdev->journal_tail); | |
2d78f8c4 N |
2054 | if (test_bit(Replacement, &rdev->flags)) |
2055 | sb->feature_map |= | |
2056 | cpu_to_le32(MD_FEATURE_REPLACEMENT); | |
5fd6c1dc | 2057 | |
f6705578 N |
2058 | if (mddev->reshape_position != MaxSector) { |
2059 | sb->feature_map |= cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); | |
2060 | sb->reshape_position = cpu_to_le64(mddev->reshape_position); | |
2061 | sb->new_layout = cpu_to_le32(mddev->new_layout); | |
2062 | sb->delta_disks = cpu_to_le32(mddev->delta_disks); | |
2063 | sb->new_level = cpu_to_le32(mddev->new_level); | |
664e7c41 | 2064 | sb->new_chunk = cpu_to_le32(mddev->new_chunk_sectors); |
2c810cdd N |
2065 | if (mddev->delta_disks == 0 && |
2066 | mddev->reshape_backwards) | |
2067 | sb->feature_map | |
2068 | |= cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS); | |
c6563a8c N |
2069 | if (rdev->new_data_offset != rdev->data_offset) { |
2070 | sb->feature_map | |
2071 | |= cpu_to_le32(MD_FEATURE_NEW_OFFSET); | |
2072 | sb->new_offset = cpu_to_le32((__u32)(rdev->new_data_offset | |
2073 | - rdev->data_offset)); | |
2074 | } | |
f6705578 | 2075 | } |
a654b9d8 | 2076 | |
3c462c88 GR |
2077 | if (mddev_is_clustered(mddev)) |
2078 | sb->feature_map |= cpu_to_le32(MD_FEATURE_CLUSTERED); | |
2079 | ||
2699b672 N |
2080 | if (rdev->badblocks.count == 0) |
2081 | /* Nothing to do for bad blocks*/ ; | |
2082 | else if (sb->bblog_offset == 0) | |
2083 | /* Cannot record bad blocks on this device */ | |
2084 | md_error(mddev, rdev); | |
2085 | else { | |
2086 | struct badblocks *bb = &rdev->badblocks; | |
ae50640b | 2087 | __le64 *bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
2088 | u64 *p = bb->page; |
2089 | sb->feature_map |= cpu_to_le32(MD_FEATURE_BAD_BLOCKS); | |
2090 | if (bb->changed) { | |
2091 | unsigned seq; | |
2092 | ||
2093 | retry: | |
2094 | seq = read_seqbegin(&bb->lock); | |
2095 | ||
2096 | memset(bbp, 0xff, PAGE_SIZE); | |
2097 | ||
2098 | for (i = 0 ; i < bb->count ; i++) { | |
35f9ac2d | 2099 | u64 internal_bb = p[i]; |
2699b672 N |
2100 | u64 store_bb = ((BB_OFFSET(internal_bb) << 10) |
2101 | | BB_LEN(internal_bb)); | |
35f9ac2d | 2102 | bbp[i] = cpu_to_le64(store_bb); |
2699b672 | 2103 | } |
d0962936 | 2104 | bb->changed = 0; |
2699b672 N |
2105 | if (read_seqretry(&bb->lock, seq)) |
2106 | goto retry; | |
2107 | ||
2108 | bb->sector = (rdev->sb_start + | |
2109 | (int)le32_to_cpu(sb->bblog_offset)); | |
2110 | bb->size = le16_to_cpu(sb->bblog_size); | |
2699b672 N |
2111 | } |
2112 | } | |
2113 | ||
1da177e4 | 2114 | max_dev = 0; |
dafb20fa | 2115 | rdev_for_each(rdev2, mddev) |
1da177e4 LT |
2116 | if (rdev2->desc_nr+1 > max_dev) |
2117 | max_dev = rdev2->desc_nr+1; | |
a778b73f | 2118 | |
70471daf N |
2119 | if (max_dev > le32_to_cpu(sb->max_dev)) { |
2120 | int bmask; | |
a778b73f | 2121 | sb->max_dev = cpu_to_le32(max_dev); |
70471daf N |
2122 | rdev->sb_size = max_dev * 2 + 256; |
2123 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; | |
2124 | if (rdev->sb_size & bmask) | |
2125 | rdev->sb_size = (rdev->sb_size | bmask) + 1; | |
ddcf3522 N |
2126 | } else |
2127 | max_dev = le32_to_cpu(sb->max_dev); | |
2128 | ||
1da177e4 | 2129 | for (i=0; i<max_dev;i++) |
8df72024 | 2130 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
f72ffdd6 | 2131 | |
a97b7896 SL |
2132 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) |
2133 | sb->feature_map |= cpu_to_le32(MD_FEATURE_JOURNAL); | |
f72ffdd6 | 2134 | |
ea0213e0 | 2135 | if (test_bit(MD_HAS_PPL, &mddev->flags)) { |
ddc08823 PB |
2136 | if (test_bit(MD_HAS_MULTIPLE_PPLS, &mddev->flags)) |
2137 | sb->feature_map |= | |
2138 | cpu_to_le32(MD_FEATURE_MULTIPLE_PPLS); | |
2139 | else | |
2140 | sb->feature_map |= cpu_to_le32(MD_FEATURE_PPL); | |
ea0213e0 AP |
2141 | sb->ppl.offset = cpu_to_le16(rdev->ppl.offset); |
2142 | sb->ppl.size = cpu_to_le16(rdev->ppl.size); | |
2143 | } | |
2144 | ||
dafb20fa | 2145 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 2146 | i = rdev2->desc_nr; |
b2d444d7 | 2147 | if (test_bit(Faulty, &rdev2->flags)) |
c4d4c91b | 2148 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY); |
b2d444d7 | 2149 | else if (test_bit(In_sync, &rdev2->flags)) |
1da177e4 | 2150 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
a97b7896 | 2151 | else if (test_bit(Journal, &rdev2->flags)) |
bac624f3 | 2152 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_JOURNAL); |
93be75ff | 2153 | else if (rdev2->raid_disk >= 0) |
5fd6c1dc | 2154 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
1da177e4 | 2155 | else |
c4d4c91b | 2156 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
1da177e4 LT |
2157 | } |
2158 | ||
1da177e4 LT |
2159 | sb->sb_csum = calc_sb_1_csum(sb); |
2160 | } | |
2161 | ||
0cd17fec | 2162 | static unsigned long long |
3cb03002 | 2163 | super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec CW |
2164 | { |
2165 | struct mdp_superblock_1 *sb; | |
15f4a5fd | 2166 | sector_t max_sectors; |
58c0fed4 | 2167 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 2168 | return 0; /* component must fit device */ |
c6563a8c N |
2169 | if (rdev->data_offset != rdev->new_data_offset) |
2170 | return 0; /* too confusing */ | |
0f420358 | 2171 | if (rdev->sb_start < rdev->data_offset) { |
0cd17fec | 2172 | /* minor versions 1 and 2; superblock before data */ |
77304d2a | 2173 | max_sectors = i_size_read(rdev->bdev->bd_inode) >> 9; |
15f4a5fd AN |
2174 | max_sectors -= rdev->data_offset; |
2175 | if (!num_sectors || num_sectors > max_sectors) | |
2176 | num_sectors = max_sectors; | |
c3d9714e | 2177 | } else if (rdev->mddev->bitmap_info.offset) { |
0cd17fec CW |
2178 | /* minor version 0 with bitmap we can't move */ |
2179 | return 0; | |
2180 | } else { | |
2181 | /* minor version 0; superblock after data */ | |
0f420358 | 2182 | sector_t sb_start; |
77304d2a | 2183 | sb_start = (i_size_read(rdev->bdev->bd_inode) >> 9) - 8*2; |
0f420358 | 2184 | sb_start &= ~(sector_t)(4*2 - 1); |
dd8ac336 | 2185 | max_sectors = rdev->sectors + sb_start - rdev->sb_start; |
15f4a5fd AN |
2186 | if (!num_sectors || num_sectors > max_sectors) |
2187 | num_sectors = max_sectors; | |
0f420358 | 2188 | rdev->sb_start = sb_start; |
0cd17fec | 2189 | } |
65a06f06 | 2190 | sb = page_address(rdev->sb_page); |
15f4a5fd | 2191 | sb->data_size = cpu_to_le64(num_sectors); |
3fb632e4 | 2192 | sb->super_offset = cpu_to_le64(rdev->sb_start); |
0cd17fec | 2193 | sb->sb_csum = calc_sb_1_csum(sb); |
46533ff7 N |
2194 | do { |
2195 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
2196 | rdev->sb_page); | |
2197 | } while (md_super_wait(rdev->mddev) < 0); | |
c26a44ed | 2198 | return num_sectors; |
c6563a8c N |
2199 | |
2200 | } | |
2201 | ||
2202 | static int | |
2203 | super_1_allow_new_offset(struct md_rdev *rdev, | |
2204 | unsigned long long new_offset) | |
2205 | { | |
2206 | /* All necessary checks on new >= old have been done */ | |
2207 | struct bitmap *bitmap; | |
2208 | if (new_offset >= rdev->data_offset) | |
2209 | return 1; | |
2210 | ||
2211 | /* with 1.0 metadata, there is no metadata to tread on | |
2212 | * so we can always move back */ | |
2213 | if (rdev->mddev->minor_version == 0) | |
2214 | return 1; | |
2215 | ||
2216 | /* otherwise we must be sure not to step on | |
2217 | * any metadata, so stay: | |
2218 | * 36K beyond start of superblock | |
2219 | * beyond end of badblocks | |
2220 | * beyond write-intent bitmap | |
2221 | */ | |
2222 | if (rdev->sb_start + (32+4)*2 > new_offset) | |
2223 | return 0; | |
2224 | bitmap = rdev->mddev->bitmap; | |
2225 | if (bitmap && !rdev->mddev->bitmap_info.file && | |
2226 | rdev->sb_start + rdev->mddev->bitmap_info.offset + | |
1ec885cd | 2227 | bitmap->storage.file_pages * (PAGE_SIZE>>9) > new_offset) |
c6563a8c N |
2228 | return 0; |
2229 | if (rdev->badblocks.sector + rdev->badblocks.size > new_offset) | |
2230 | return 0; | |
2231 | ||
2232 | return 1; | |
0cd17fec | 2233 | } |
1da177e4 | 2234 | |
75c96f85 | 2235 | static struct super_type super_types[] = { |
1da177e4 LT |
2236 | [0] = { |
2237 | .name = "0.90.0", | |
2238 | .owner = THIS_MODULE, | |
0cd17fec CW |
2239 | .load_super = super_90_load, |
2240 | .validate_super = super_90_validate, | |
2241 | .sync_super = super_90_sync, | |
2242 | .rdev_size_change = super_90_rdev_size_change, | |
c6563a8c | 2243 | .allow_new_offset = super_90_allow_new_offset, |
1da177e4 LT |
2244 | }, |
2245 | [1] = { | |
2246 | .name = "md-1", | |
2247 | .owner = THIS_MODULE, | |
0cd17fec CW |
2248 | .load_super = super_1_load, |
2249 | .validate_super = super_1_validate, | |
2250 | .sync_super = super_1_sync, | |
2251 | .rdev_size_change = super_1_rdev_size_change, | |
c6563a8c | 2252 | .allow_new_offset = super_1_allow_new_offset, |
1da177e4 LT |
2253 | }, |
2254 | }; | |
1da177e4 | 2255 | |
fd01b88c | 2256 | static void sync_super(struct mddev *mddev, struct md_rdev *rdev) |
076f968b JB |
2257 | { |
2258 | if (mddev->sync_super) { | |
2259 | mddev->sync_super(mddev, rdev); | |
2260 | return; | |
2261 | } | |
2262 | ||
2263 | BUG_ON(mddev->major_version >= ARRAY_SIZE(super_types)); | |
2264 | ||
2265 | super_types[mddev->major_version].sync_super(mddev, rdev); | |
2266 | } | |
2267 | ||
fd01b88c | 2268 | static int match_mddev_units(struct mddev *mddev1, struct mddev *mddev2) |
1da177e4 | 2269 | { |
3cb03002 | 2270 | struct md_rdev *rdev, *rdev2; |
1da177e4 | 2271 | |
4b80991c | 2272 | rcu_read_lock(); |
0b020e85 SL |
2273 | rdev_for_each_rcu(rdev, mddev1) { |
2274 | if (test_bit(Faulty, &rdev->flags) || | |
2275 | test_bit(Journal, &rdev->flags) || | |
2276 | rdev->raid_disk == -1) | |
2277 | continue; | |
2278 | rdev_for_each_rcu(rdev2, mddev2) { | |
2279 | if (test_bit(Faulty, &rdev2->flags) || | |
2280 | test_bit(Journal, &rdev2->flags) || | |
2281 | rdev2->raid_disk == -1) | |
2282 | continue; | |
7dd5e7c3 | 2283 | if (rdev->bdev->bd_contains == |
4b80991c N |
2284 | rdev2->bdev->bd_contains) { |
2285 | rcu_read_unlock(); | |
7dd5e7c3 | 2286 | return 1; |
4b80991c | 2287 | } |
0b020e85 SL |
2288 | } |
2289 | } | |
4b80991c | 2290 | rcu_read_unlock(); |
1da177e4 LT |
2291 | return 0; |
2292 | } | |
2293 | ||
2294 | static LIST_HEAD(pending_raid_disks); | |
2295 | ||
ac5e7113 AN |
2296 | /* |
2297 | * Try to register data integrity profile for an mddev | |
2298 | * | |
2299 | * This is called when an array is started and after a disk has been kicked | |
2300 | * from the array. It only succeeds if all working and active component devices | |
2301 | * are integrity capable with matching profiles. | |
2302 | */ | |
fd01b88c | 2303 | int md_integrity_register(struct mddev *mddev) |
ac5e7113 | 2304 | { |
3cb03002 | 2305 | struct md_rdev *rdev, *reference = NULL; |
ac5e7113 AN |
2306 | |
2307 | if (list_empty(&mddev->disks)) | |
2308 | return 0; /* nothing to do */ | |
629acb6a JB |
2309 | if (!mddev->gendisk || blk_get_integrity(mddev->gendisk)) |
2310 | return 0; /* shouldn't register, or already is */ | |
dafb20fa | 2311 | rdev_for_each(rdev, mddev) { |
ac5e7113 AN |
2312 | /* skip spares and non-functional disks */ |
2313 | if (test_bit(Faulty, &rdev->flags)) | |
2314 | continue; | |
2315 | if (rdev->raid_disk < 0) | |
2316 | continue; | |
ac5e7113 AN |
2317 | if (!reference) { |
2318 | /* Use the first rdev as the reference */ | |
2319 | reference = rdev; | |
2320 | continue; | |
2321 | } | |
2322 | /* does this rdev's profile match the reference profile? */ | |
2323 | if (blk_integrity_compare(reference->bdev->bd_disk, | |
2324 | rdev->bdev->bd_disk) < 0) | |
2325 | return -EINVAL; | |
2326 | } | |
89078d57 MP |
2327 | if (!reference || !bdev_get_integrity(reference->bdev)) |
2328 | return 0; | |
ac5e7113 AN |
2329 | /* |
2330 | * All component devices are integrity capable and have matching | |
2331 | * profiles, register the common profile for the md device. | |
2332 | */ | |
25520d55 MP |
2333 | blk_integrity_register(mddev->gendisk, |
2334 | bdev_get_integrity(reference->bdev)); | |
2335 | ||
9d48739e | 2336 | pr_debug("md: data integrity enabled on %s\n", mdname(mddev)); |
afeee514 | 2337 | if (bioset_integrity_create(&mddev->bio_set, BIO_POOL_SIZE)) { |
9d48739e | 2338 | pr_err("md: failed to create integrity pool for %s\n", |
a91a2785 MP |
2339 | mdname(mddev)); |
2340 | return -EINVAL; | |
2341 | } | |
ac5e7113 AN |
2342 | return 0; |
2343 | } | |
2344 | EXPORT_SYMBOL(md_integrity_register); | |
2345 | ||
1501efad DW |
2346 | /* |
2347 | * Attempt to add an rdev, but only if it is consistent with the current | |
2348 | * integrity profile | |
2349 | */ | |
2350 | int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev) | |
3f9d99c1 | 2351 | { |
2863b9eb | 2352 | struct blk_integrity *bi_mddev; |
1501efad | 2353 | char name[BDEVNAME_SIZE]; |
2863b9eb JB |
2354 | |
2355 | if (!mddev->gendisk) | |
1501efad | 2356 | return 0; |
2863b9eb | 2357 | |
2863b9eb | 2358 | bi_mddev = blk_get_integrity(mddev->gendisk); |
3f9d99c1 | 2359 | |
ac5e7113 | 2360 | if (!bi_mddev) /* nothing to do */ |
1501efad DW |
2361 | return 0; |
2362 | ||
2363 | if (blk_integrity_compare(mddev->gendisk, rdev->bdev->bd_disk) != 0) { | |
9d48739e N |
2364 | pr_err("%s: incompatible integrity profile for %s\n", |
2365 | mdname(mddev), bdevname(rdev->bdev, name)); | |
1501efad DW |
2366 | return -ENXIO; |
2367 | } | |
2368 | ||
2369 | return 0; | |
3f9d99c1 | 2370 | } |
ac5e7113 | 2371 | EXPORT_SYMBOL(md_integrity_add_rdev); |
3f9d99c1 | 2372 | |
f72ffdd6 | 2373 | static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) |
1da177e4 | 2374 | { |
7dd5e7c3 | 2375 | char b[BDEVNAME_SIZE]; |
f637b9f9 | 2376 | struct kobject *ko; |
5e55e2f5 | 2377 | int err; |
1da177e4 | 2378 | |
11e2ede0 DW |
2379 | /* prevent duplicates */ |
2380 | if (find_rdev(mddev, rdev->bdev->bd_dev)) | |
2381 | return -EEXIST; | |
2382 | ||
97b20ef7 N |
2383 | if ((bdev_read_only(rdev->bdev) || bdev_read_only(rdev->meta_bdev)) && |
2384 | mddev->pers) | |
2385 | return -EROFS; | |
2386 | ||
dd8ac336 | 2387 | /* make sure rdev->sectors exceeds mddev->dev_sectors */ |
f6b6ec5c SL |
2388 | if (!test_bit(Journal, &rdev->flags) && |
2389 | rdev->sectors && | |
2390 | (mddev->dev_sectors == 0 || rdev->sectors < mddev->dev_sectors)) { | |
a778b73f N |
2391 | if (mddev->pers) { |
2392 | /* Cannot change size, so fail | |
2393 | * If mddev->level <= 0, then we don't care | |
2394 | * about aligning sizes (e.g. linear) | |
2395 | */ | |
2396 | if (mddev->level > 0) | |
2397 | return -ENOSPC; | |
2398 | } else | |
dd8ac336 | 2399 | mddev->dev_sectors = rdev->sectors; |
2bf071bf | 2400 | } |
1da177e4 LT |
2401 | |
2402 | /* Verify rdev->desc_nr is unique. | |
2403 | * If it is -1, assign a free number, else | |
2404 | * check number is not in use | |
2405 | */ | |
4878e9eb | 2406 | rcu_read_lock(); |
1da177e4 LT |
2407 | if (rdev->desc_nr < 0) { |
2408 | int choice = 0; | |
4878e9eb N |
2409 | if (mddev->pers) |
2410 | choice = mddev->raid_disks; | |
57d051dc | 2411 | while (md_find_rdev_nr_rcu(mddev, choice)) |
1da177e4 LT |
2412 | choice++; |
2413 | rdev->desc_nr = choice; | |
2414 | } else { | |
57d051dc | 2415 | if (md_find_rdev_nr_rcu(mddev, rdev->desc_nr)) { |
4878e9eb | 2416 | rcu_read_unlock(); |
1da177e4 | 2417 | return -EBUSY; |
4878e9eb | 2418 | } |
1da177e4 | 2419 | } |
4878e9eb | 2420 | rcu_read_unlock(); |
f6b6ec5c SL |
2421 | if (!test_bit(Journal, &rdev->flags) && |
2422 | mddev->max_disks && rdev->desc_nr >= mddev->max_disks) { | |
9d48739e N |
2423 | pr_warn("md: %s: array is limited to %d devices\n", |
2424 | mdname(mddev), mddev->max_disks); | |
de01dfad N |
2425 | return -EBUSY; |
2426 | } | |
19133a42 | 2427 | bdevname(rdev->bdev,b); |
90a9befb | 2428 | strreplace(b, '/', '!'); |
649316b2 | 2429 | |
1da177e4 | 2430 | rdev->mddev = mddev; |
9d48739e | 2431 | pr_debug("md: bind<%s>\n", b); |
86e6ffdd | 2432 | |
963c555e | 2433 | if (mddev->raid_disks) |
404659cf | 2434 | mddev_create_serial_pool(mddev, rdev, false); |
963c555e | 2435 | |
b2d6db58 | 2436 | if ((err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b))) |
5e55e2f5 | 2437 | goto fail; |
86e6ffdd | 2438 | |
0762b8bd | 2439 | ko = &part_to_dev(rdev->bdev->bd_part)->kobj; |
00bcb4ac N |
2440 | if (sysfs_create_link(&rdev->kobj, ko, "block")) |
2441 | /* failure here is OK */; | |
2442 | rdev->sysfs_state = sysfs_get_dirent_safe(rdev->kobj.sd, "state"); | |
3c0ee63a | 2443 | |
4b80991c | 2444 | list_add_rcu(&rdev->same_set, &mddev->disks); |
e09b457b | 2445 | bd_link_disk_holder(rdev->bdev, mddev->gendisk); |
4044ba58 N |
2446 | |
2447 | /* May as well allow recovery to be retried once */ | |
5389042f | 2448 | mddev->recovery_disabled++; |
3f9d99c1 | 2449 | |
1da177e4 | 2450 | return 0; |
5e55e2f5 N |
2451 | |
2452 | fail: | |
9d48739e N |
2453 | pr_warn("md: failed to register dev-%s for %s\n", |
2454 | b, mdname(mddev)); | |
5e55e2f5 | 2455 | return err; |
1da177e4 LT |
2456 | } |
2457 | ||
cc1ffe61 | 2458 | static void rdev_delayed_delete(struct work_struct *ws) |
5792a285 | 2459 | { |
3cb03002 | 2460 | struct md_rdev *rdev = container_of(ws, struct md_rdev, del_work); |
5792a285 | 2461 | kobject_del(&rdev->kobj); |
177a99b2 | 2462 | kobject_put(&rdev->kobj); |
5792a285 N |
2463 | } |
2464 | ||
f72ffdd6 | 2465 | static void unbind_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2466 | { |
2467 | char b[BDEVNAME_SIZE]; | |
403df478 | 2468 | |
49731baa | 2469 | bd_unlink_disk_holder(rdev->bdev, rdev->mddev->gendisk); |
4b80991c | 2470 | list_del_rcu(&rdev->same_set); |
9d48739e | 2471 | pr_debug("md: unbind<%s>\n", bdevname(rdev->bdev,b)); |
11d3a9f6 | 2472 | mddev_destroy_serial_pool(rdev->mddev, rdev, false); |
1da177e4 | 2473 | rdev->mddev = NULL; |
86e6ffdd | 2474 | sysfs_remove_link(&rdev->kobj, "block"); |
3c0ee63a N |
2475 | sysfs_put(rdev->sysfs_state); |
2476 | rdev->sysfs_state = NULL; | |
2230dfe4 | 2477 | rdev->badblocks.count = 0; |
5792a285 | 2478 | /* We need to delay this, otherwise we can deadlock when |
4b80991c N |
2479 | * writing to 'remove' to "dev/state". We also need |
2480 | * to delay it due to rcu usage. | |
5792a285 | 2481 | */ |
4b80991c | 2482 | synchronize_rcu(); |
cc1ffe61 | 2483 | INIT_WORK(&rdev->del_work, rdev_delayed_delete); |
177a99b2 | 2484 | kobject_get(&rdev->kobj); |
cc1ffe61 | 2485 | queue_work(md_rdev_misc_wq, &rdev->del_work); |
1da177e4 LT |
2486 | } |
2487 | ||
2488 | /* | |
2489 | * prevent the device from being mounted, repartitioned or | |
2490 | * otherwise reused by a RAID array (or any other kernel | |
2491 | * subsystem), by bd_claiming the device. | |
2492 | */ | |
3cb03002 | 2493 | static int lock_rdev(struct md_rdev *rdev, dev_t dev, int shared) |
1da177e4 LT |
2494 | { |
2495 | int err = 0; | |
2496 | struct block_device *bdev; | |
1da177e4 | 2497 | |
d4d77629 | 2498 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, |
3cb03002 | 2499 | shared ? (struct md_rdev *)lock_rdev : rdev); |
1da177e4 | 2500 | if (IS_ERR(bdev)) { |
ea3edd4d CH |
2501 | pr_warn("md: could not open device unknown-block(%u,%u).\n", |
2502 | MAJOR(dev), MINOR(dev)); | |
1da177e4 LT |
2503 | return PTR_ERR(bdev); |
2504 | } | |
1da177e4 LT |
2505 | rdev->bdev = bdev; |
2506 | return err; | |
2507 | } | |
2508 | ||
3cb03002 | 2509 | static void unlock_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2510 | { |
2511 | struct block_device *bdev = rdev->bdev; | |
2512 | rdev->bdev = NULL; | |
e525fd89 | 2513 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
1da177e4 LT |
2514 | } |
2515 | ||
2516 | void md_autodetect_dev(dev_t dev); | |
2517 | ||
f72ffdd6 | 2518 | static void export_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2519 | { |
2520 | char b[BDEVNAME_SIZE]; | |
403df478 | 2521 | |
9d48739e | 2522 | pr_debug("md: export_rdev(%s)\n", bdevname(rdev->bdev,b)); |
545c8795 | 2523 | md_rdev_clear(rdev); |
1da177e4 | 2524 | #ifndef MODULE |
d0fae18f N |
2525 | if (test_bit(AutoDetected, &rdev->flags)) |
2526 | md_autodetect_dev(rdev->bdev->bd_dev); | |
1da177e4 LT |
2527 | #endif |
2528 | unlock_rdev(rdev); | |
86e6ffdd | 2529 | kobject_put(&rdev->kobj); |
1da177e4 LT |
2530 | } |
2531 | ||
fb56dfef | 2532 | void md_kick_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2533 | { |
2534 | unbind_rdev_from_array(rdev); | |
2535 | export_rdev(rdev); | |
2536 | } | |
fb56dfef | 2537 | EXPORT_SYMBOL_GPL(md_kick_rdev_from_array); |
1da177e4 | 2538 | |
fd01b88c | 2539 | static void export_array(struct mddev *mddev) |
1da177e4 | 2540 | { |
0638bb0e | 2541 | struct md_rdev *rdev; |
1da177e4 | 2542 | |
0638bb0e N |
2543 | while (!list_empty(&mddev->disks)) { |
2544 | rdev = list_first_entry(&mddev->disks, struct md_rdev, | |
2545 | same_set); | |
fb56dfef | 2546 | md_kick_rdev_from_array(rdev); |
1da177e4 | 2547 | } |
1da177e4 LT |
2548 | mddev->raid_disks = 0; |
2549 | mddev->major_version = 0; | |
2550 | } | |
2551 | ||
6497709b N |
2552 | static bool set_in_sync(struct mddev *mddev) |
2553 | { | |
efa4b77b | 2554 | lockdep_assert_held(&mddev->lock); |
4ad23a97 N |
2555 | if (!mddev->in_sync) { |
2556 | mddev->sync_checkers++; | |
2557 | spin_unlock(&mddev->lock); | |
2558 | percpu_ref_switch_to_atomic_sync(&mddev->writes_pending); | |
2559 | spin_lock(&mddev->lock); | |
2560 | if (!mddev->in_sync && | |
2561 | percpu_ref_is_zero(&mddev->writes_pending)) { | |
6497709b | 2562 | mddev->in_sync = 1; |
4ad23a97 N |
2563 | /* |
2564 | * Ensure ->in_sync is visible before we clear | |
2565 | * ->sync_checkers. | |
2566 | */ | |
55cc39f3 | 2567 | smp_mb(); |
6497709b N |
2568 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2569 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
2570 | } | |
4ad23a97 N |
2571 | if (--mddev->sync_checkers == 0) |
2572 | percpu_ref_switch_to_percpu(&mddev->writes_pending); | |
6497709b N |
2573 | } |
2574 | if (mddev->safemode == 1) | |
2575 | mddev->safemode = 0; | |
2576 | return mddev->in_sync; | |
2577 | } | |
2578 | ||
f72ffdd6 | 2579 | static void sync_sbs(struct mddev *mddev, int nospares) |
1da177e4 | 2580 | { |
42543769 N |
2581 | /* Update each superblock (in-memory image), but |
2582 | * if we are allowed to, skip spares which already | |
2583 | * have the right event counter, or have one earlier | |
2584 | * (which would mean they aren't being marked as dirty | |
2585 | * with the rest of the array) | |
2586 | */ | |
3cb03002 | 2587 | struct md_rdev *rdev; |
dafb20fa | 2588 | rdev_for_each(rdev, mddev) { |
42543769 N |
2589 | if (rdev->sb_events == mddev->events || |
2590 | (nospares && | |
2591 | rdev->raid_disk < 0 && | |
42543769 N |
2592 | rdev->sb_events+1 == mddev->events)) { |
2593 | /* Don't update this superblock */ | |
2594 | rdev->sb_loaded = 2; | |
2595 | } else { | |
076f968b | 2596 | sync_super(mddev, rdev); |
42543769 N |
2597 | rdev->sb_loaded = 1; |
2598 | } | |
1da177e4 LT |
2599 | } |
2600 | } | |
2601 | ||
2aa82191 GR |
2602 | static bool does_sb_need_changing(struct mddev *mddev) |
2603 | { | |
2604 | struct md_rdev *rdev; | |
2605 | struct mdp_superblock_1 *sb; | |
2606 | int role; | |
2607 | ||
2608 | /* Find a good rdev */ | |
2609 | rdev_for_each(rdev, mddev) | |
2610 | if ((rdev->raid_disk >= 0) && !test_bit(Faulty, &rdev->flags)) | |
2611 | break; | |
2612 | ||
2613 | /* No good device found. */ | |
2614 | if (!rdev) | |
2615 | return false; | |
2616 | ||
2617 | sb = page_address(rdev->sb_page); | |
2618 | /* Check if a device has become faulty or a spare become active */ | |
2619 | rdev_for_each(rdev, mddev) { | |
2620 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
2621 | /* Device activated? */ | |
2622 | if (role == 0xffff && rdev->raid_disk >=0 && | |
2623 | !test_bit(Faulty, &rdev->flags)) | |
2624 | return true; | |
2625 | /* Device turned faulty? */ | |
2626 | if (test_bit(Faulty, &rdev->flags) && (role < 0xfffd)) | |
2627 | return true; | |
2628 | } | |
2629 | ||
2630 | /* Check if any mddev parameters have changed */ | |
2631 | if ((mddev->dev_sectors != le64_to_cpu(sb->size)) || | |
2632 | (mddev->reshape_position != le64_to_cpu(sb->reshape_position)) || | |
13459213 | 2633 | (mddev->layout != le32_to_cpu(sb->layout)) || |
2aa82191 GR |
2634 | (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) || |
2635 | (mddev->chunk_sectors != le32_to_cpu(sb->chunksize))) | |
2636 | return true; | |
2637 | ||
2638 | return false; | |
2639 | } | |
2640 | ||
1aee41f6 | 2641 | void md_update_sb(struct mddev *mddev, int force_change) |
1da177e4 | 2642 | { |
3cb03002 | 2643 | struct md_rdev *rdev; |
06d91a5f | 2644 | int sync_req; |
42543769 | 2645 | int nospares = 0; |
2699b672 | 2646 | int any_badblocks_changed = 0; |
23b63f9f | 2647 | int ret = -1; |
1da177e4 | 2648 | |
d87f064f N |
2649 | if (mddev->ro) { |
2650 | if (force_change) | |
2953079c | 2651 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
d87f064f N |
2652 | return; |
2653 | } | |
2aa82191 | 2654 | |
2c97cf13 | 2655 | repeat: |
2aa82191 | 2656 | if (mddev_is_clustered(mddev)) { |
2953079c | 2657 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
2aa82191 | 2658 | force_change = 1; |
2953079c | 2659 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
85ad1d13 | 2660 | nospares = 1; |
23b63f9f | 2661 | ret = md_cluster_ops->metadata_update_start(mddev); |
2aa82191 GR |
2662 | /* Has someone else has updated the sb */ |
2663 | if (!does_sb_need_changing(mddev)) { | |
23b63f9f GJ |
2664 | if (ret == 0) |
2665 | md_cluster_ops->metadata_update_cancel(mddev); | |
2953079c SL |
2666 | bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2667 | BIT(MD_SB_CHANGE_DEVS) | | |
2668 | BIT(MD_SB_CHANGE_CLEAN)); | |
2aa82191 GR |
2669 | return; |
2670 | } | |
2671 | } | |
2c97cf13 | 2672 | |
db0505d3 N |
2673 | /* |
2674 | * First make sure individual recovery_offsets are correct | |
2675 | * curr_resync_completed can only be used during recovery. | |
2676 | * During reshape/resync it might use array-addresses rather | |
2677 | * that device addresses. | |
2678 | */ | |
dafb20fa | 2679 | rdev_for_each(rdev, mddev) { |
3a3a5ddb N |
2680 | if (rdev->raid_disk >= 0 && |
2681 | mddev->delta_disks >= 0 && | |
db0505d3 N |
2682 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
2683 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery) && | |
2684 | !test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
f2076e7d | 2685 | !test_bit(Journal, &rdev->flags) && |
3a3a5ddb N |
2686 | !test_bit(In_sync, &rdev->flags) && |
2687 | mddev->curr_resync_completed > rdev->recovery_offset) | |
2688 | rdev->recovery_offset = mddev->curr_resync_completed; | |
2689 | ||
f72ffdd6 | 2690 | } |
bd52b746 | 2691 | if (!mddev->persistent) { |
2953079c SL |
2692 | clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2693 | clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
de393cde | 2694 | if (!mddev->external) { |
2953079c | 2695 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
dafb20fa | 2696 | rdev_for_each(rdev, mddev) { |
de393cde | 2697 | if (rdev->badblocks.changed) { |
d0962936 | 2698 | rdev->badblocks.changed = 0; |
fc974ee2 | 2699 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2700 | md_error(mddev, rdev); |
2701 | } | |
2702 | clear_bit(Blocked, &rdev->flags); | |
2703 | clear_bit(BlockedBadBlocks, &rdev->flags); | |
2704 | wake_up(&rdev->blocked_wait); | |
2705 | } | |
2706 | } | |
3a3a5ddb N |
2707 | wake_up(&mddev->sb_wait); |
2708 | return; | |
2709 | } | |
2710 | ||
85572d7c | 2711 | spin_lock(&mddev->lock); |
84692195 | 2712 | |
9ebc6ef1 | 2713 | mddev->utime = ktime_get_real_seconds(); |
3a3a5ddb | 2714 | |
2953079c | 2715 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
850b2b42 | 2716 | force_change = 1; |
2953079c | 2717 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
850b2b42 N |
2718 | /* just a clean<-> dirty transition, possibly leave spares alone, |
2719 | * though if events isn't the right even/odd, we will have to do | |
2720 | * spares after all | |
2721 | */ | |
2722 | nospares = 1; | |
2723 | if (force_change) | |
2724 | nospares = 0; | |
2725 | if (mddev->degraded) | |
84692195 N |
2726 | /* If the array is degraded, then skipping spares is both |
2727 | * dangerous and fairly pointless. | |
2728 | * Dangerous because a device that was removed from the array | |
2729 | * might have a event_count that still looks up-to-date, | |
2730 | * so it can be re-added without a resync. | |
2731 | * Pointless because if there are any spares to skip, | |
2732 | * then a recovery will happen and soon that array won't | |
2733 | * be degraded any more and the spare can go back to sleep then. | |
2734 | */ | |
850b2b42 | 2735 | nospares = 0; |
84692195 | 2736 | |
06d91a5f | 2737 | sync_req = mddev->in_sync; |
42543769 N |
2738 | |
2739 | /* If this is just a dirty<->clean transition, and the array is clean | |
2740 | * and 'events' is odd, we can roll back to the previous clean state */ | |
850b2b42 | 2741 | if (nospares |
42543769 | 2742 | && (mddev->in_sync && mddev->recovery_cp == MaxSector) |
a8707c08 N |
2743 | && mddev->can_decrease_events |
2744 | && mddev->events != 1) { | |
42543769 | 2745 | mddev->events--; |
a8707c08 N |
2746 | mddev->can_decrease_events = 0; |
2747 | } else { | |
42543769 N |
2748 | /* otherwise we have to go forward and ... */ |
2749 | mddev->events ++; | |
a8707c08 | 2750 | mddev->can_decrease_events = nospares; |
42543769 | 2751 | } |
1da177e4 | 2752 | |
403df478 N |
2753 | /* |
2754 | * This 64-bit counter should never wrap. | |
2755 | * Either we are in around ~1 trillion A.C., assuming | |
2756 | * 1 reboot per second, or we have a bug... | |
2757 | */ | |
2758 | WARN_ON(mddev->events == 0); | |
2699b672 | 2759 | |
dafb20fa | 2760 | rdev_for_each(rdev, mddev) { |
2699b672 N |
2761 | if (rdev->badblocks.changed) |
2762 | any_badblocks_changed++; | |
de393cde N |
2763 | if (test_bit(Faulty, &rdev->flags)) |
2764 | set_bit(FaultRecorded, &rdev->flags); | |
2765 | } | |
2699b672 | 2766 | |
e691063a | 2767 | sync_sbs(mddev, nospares); |
85572d7c | 2768 | spin_unlock(&mddev->lock); |
1da177e4 | 2769 | |
36a4e1fe N |
2770 | pr_debug("md: updating %s RAID superblock on device (in sync %d)\n", |
2771 | mdname(mddev), mddev->in_sync); | |
1da177e4 | 2772 | |
504634f6 SL |
2773 | if (mddev->queue) |
2774 | blk_add_trace_msg(mddev->queue, "md md_update_sb"); | |
46533ff7 | 2775 | rewrite: |
e64e4018 | 2776 | md_bitmap_update_sb(mddev->bitmap); |
dafb20fa | 2777 | rdev_for_each(rdev, mddev) { |
1da177e4 | 2778 | char b[BDEVNAME_SIZE]; |
36a4e1fe | 2779 | |
42543769 N |
2780 | if (rdev->sb_loaded != 1) |
2781 | continue; /* no noise on spare devices */ | |
1da177e4 | 2782 | |
f466722c | 2783 | if (!test_bit(Faulty, &rdev->flags)) { |
7bfa19f2 | 2784 | md_super_write(mddev,rdev, |
0f420358 | 2785 | rdev->sb_start, rdev->sb_size, |
7bfa19f2 | 2786 | rdev->sb_page); |
36a4e1fe N |
2787 | pr_debug("md: (write) %s's sb offset: %llu\n", |
2788 | bdevname(rdev->bdev, b), | |
2789 | (unsigned long long)rdev->sb_start); | |
42543769 | 2790 | rdev->sb_events = mddev->events; |
2699b672 N |
2791 | if (rdev->badblocks.size) { |
2792 | md_super_write(mddev, rdev, | |
2793 | rdev->badblocks.sector, | |
2794 | rdev->badblocks.size << 9, | |
2795 | rdev->bb_page); | |
2796 | rdev->badblocks.size = 0; | |
2797 | } | |
7bfa19f2 | 2798 | |
f466722c | 2799 | } else |
36a4e1fe N |
2800 | pr_debug("md: %s (skipping faulty)\n", |
2801 | bdevname(rdev->bdev, b)); | |
d70ed2e4 | 2802 | |
7bfa19f2 | 2803 | if (mddev->level == LEVEL_MULTIPATH) |
1da177e4 LT |
2804 | /* only need to write one superblock... */ |
2805 | break; | |
2806 | } | |
46533ff7 N |
2807 | if (md_super_wait(mddev) < 0) |
2808 | goto rewrite; | |
2953079c | 2809 | /* if there was a failure, MD_SB_CHANGE_DEVS was set, and we re-write super */ |
7bfa19f2 | 2810 | |
2c97cf13 GJ |
2811 | if (mddev_is_clustered(mddev) && ret == 0) |
2812 | md_cluster_ops->metadata_update_finish(mddev); | |
2813 | ||
850b2b42 | 2814 | if (mddev->in_sync != sync_req || |
2953079c SL |
2815 | !bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2816 | BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_CLEAN))) | |
06d91a5f | 2817 | /* have to write it out again */ |
06d91a5f | 2818 | goto repeat; |
3d310eb7 | 2819 | wake_up(&mddev->sb_wait); |
acb180b0 N |
2820 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
2821 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); | |
06d91a5f | 2822 | |
dafb20fa | 2823 | rdev_for_each(rdev, mddev) { |
de393cde N |
2824 | if (test_and_clear_bit(FaultRecorded, &rdev->flags)) |
2825 | clear_bit(Blocked, &rdev->flags); | |
2826 | ||
2827 | if (any_badblocks_changed) | |
fc974ee2 | 2828 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2829 | clear_bit(BlockedBadBlocks, &rdev->flags); |
2830 | wake_up(&rdev->blocked_wait); | |
2831 | } | |
1da177e4 | 2832 | } |
1aee41f6 | 2833 | EXPORT_SYMBOL(md_update_sb); |
1da177e4 | 2834 | |
a6da4ef8 GR |
2835 | static int add_bound_rdev(struct md_rdev *rdev) |
2836 | { | |
2837 | struct mddev *mddev = rdev->mddev; | |
2838 | int err = 0; | |
87d4d916 | 2839 | bool add_journal = test_bit(Journal, &rdev->flags); |
a6da4ef8 | 2840 | |
87d4d916 | 2841 | if (!mddev->pers->hot_remove_disk || add_journal) { |
a6da4ef8 GR |
2842 | /* If there is hot_add_disk but no hot_remove_disk |
2843 | * then added disks for geometry changes, | |
2844 | * and should be added immediately. | |
2845 | */ | |
2846 | super_types[mddev->major_version]. | |
2847 | validate_super(mddev, rdev); | |
87d4d916 SL |
2848 | if (add_journal) |
2849 | mddev_suspend(mddev); | |
a6da4ef8 | 2850 | err = mddev->pers->hot_add_disk(mddev, rdev); |
87d4d916 SL |
2851 | if (add_journal) |
2852 | mddev_resume(mddev); | |
a6da4ef8 | 2853 | if (err) { |
db767672 | 2854 | md_kick_rdev_from_array(rdev); |
a6da4ef8 GR |
2855 | return err; |
2856 | } | |
2857 | } | |
2858 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2859 | ||
2953079c | 2860 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a6da4ef8 GR |
2861 | if (mddev->degraded) |
2862 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
2863 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
2864 | md_new_event(mddev); | |
2865 | md_wakeup_thread(mddev->thread); | |
2866 | return 0; | |
2867 | } | |
1da177e4 | 2868 | |
7f6ce769 | 2869 | /* words written to sysfs files may, or may not, be \n terminated. |
bce74dac N |
2870 | * We want to accept with case. For this we use cmd_match. |
2871 | */ | |
2872 | static int cmd_match(const char *cmd, const char *str) | |
2873 | { | |
2874 | /* See if cmd, written into a sysfs file, matches | |
2875 | * str. They must either be the same, or cmd can | |
2876 | * have a trailing newline | |
2877 | */ | |
2878 | while (*cmd && *str && *cmd == *str) { | |
2879 | cmd++; | |
2880 | str++; | |
2881 | } | |
2882 | if (*cmd == '\n') | |
2883 | cmd++; | |
2884 | if (*str || *cmd) | |
2885 | return 0; | |
2886 | return 1; | |
2887 | } | |
2888 | ||
86e6ffdd N |
2889 | struct rdev_sysfs_entry { |
2890 | struct attribute attr; | |
3cb03002 N |
2891 | ssize_t (*show)(struct md_rdev *, char *); |
2892 | ssize_t (*store)(struct md_rdev *, const char *, size_t); | |
86e6ffdd N |
2893 | }; |
2894 | ||
2895 | static ssize_t | |
3cb03002 | 2896 | state_show(struct md_rdev *rdev, char *page) |
86e6ffdd | 2897 | { |
35b785f7 | 2898 | char *sep = ","; |
20a49ff6 | 2899 | size_t len = 0; |
6aa7de05 | 2900 | unsigned long flags = READ_ONCE(rdev->flags); |
86e6ffdd | 2901 | |
758bfc8a | 2902 | if (test_bit(Faulty, &flags) || |
dcbcb486 TM |
2903 | (!test_bit(ExternalBbl, &flags) && |
2904 | rdev->badblocks.unacked_exist)) | |
35b785f7 TM |
2905 | len += sprintf(page+len, "faulty%s", sep); |
2906 | if (test_bit(In_sync, &flags)) | |
2907 | len += sprintf(page+len, "in_sync%s", sep); | |
2908 | if (test_bit(Journal, &flags)) | |
2909 | len += sprintf(page+len, "journal%s", sep); | |
2910 | if (test_bit(WriteMostly, &flags)) | |
2911 | len += sprintf(page+len, "write_mostly%s", sep); | |
758bfc8a | 2912 | if (test_bit(Blocked, &flags) || |
52c64152 | 2913 | (rdev->badblocks.unacked_exist |
35b785f7 TM |
2914 | && !test_bit(Faulty, &flags))) |
2915 | len += sprintf(page+len, "blocked%s", sep); | |
758bfc8a | 2916 | if (!test_bit(Faulty, &flags) && |
f2076e7d | 2917 | !test_bit(Journal, &flags) && |
35b785f7 TM |
2918 | !test_bit(In_sync, &flags)) |
2919 | len += sprintf(page+len, "spare%s", sep); | |
2920 | if (test_bit(WriteErrorSeen, &flags)) | |
2921 | len += sprintf(page+len, "write_error%s", sep); | |
2922 | if (test_bit(WantReplacement, &flags)) | |
2923 | len += sprintf(page+len, "want_replacement%s", sep); | |
2924 | if (test_bit(Replacement, &flags)) | |
2925 | len += sprintf(page+len, "replacement%s", sep); | |
2926 | if (test_bit(ExternalBbl, &flags)) | |
2927 | len += sprintf(page+len, "external_bbl%s", sep); | |
688834e6 N |
2928 | if (test_bit(FailFast, &flags)) |
2929 | len += sprintf(page+len, "failfast%s", sep); | |
35b785f7 TM |
2930 | |
2931 | if (len) | |
2932 | len -= strlen(sep); | |
2d78f8c4 | 2933 | |
86e6ffdd N |
2934 | return len+sprintf(page+len, "\n"); |
2935 | } | |
2936 | ||
45dc2de1 | 2937 | static ssize_t |
3cb03002 | 2938 | state_store(struct md_rdev *rdev, const char *buf, size_t len) |
45dc2de1 N |
2939 | { |
2940 | /* can write | |
de393cde | 2941 | * faulty - simulates an error |
45dc2de1 | 2942 | * remove - disconnects the device |
f655675b N |
2943 | * writemostly - sets write_mostly |
2944 | * -writemostly - clears write_mostly | |
de393cde N |
2945 | * blocked - sets the Blocked flags |
2946 | * -blocked - clears the Blocked and possibly simulates an error | |
6d56e278 | 2947 | * insync - sets Insync providing device isn't active |
f466722c N |
2948 | * -insync - clear Insync for a device with a slot assigned, |
2949 | * so that it gets rebuilt based on bitmap | |
d7a9d443 N |
2950 | * write_error - sets WriteErrorSeen |
2951 | * -write_error - clears WriteErrorSeen | |
688834e6 | 2952 | * {,-}failfast - set/clear FailFast |
45dc2de1 N |
2953 | */ |
2954 | int err = -EINVAL; | |
2955 | if (cmd_match(buf, "faulty") && rdev->mddev->pers) { | |
2956 | md_error(rdev->mddev, rdev); | |
5ef56c8f N |
2957 | if (test_bit(Faulty, &rdev->flags)) |
2958 | err = 0; | |
2959 | else | |
2960 | err = -EBUSY; | |
45dc2de1 | 2961 | } else if (cmd_match(buf, "remove")) { |
5d881783 SL |
2962 | if (rdev->mddev->pers) { |
2963 | clear_bit(Blocked, &rdev->flags); | |
2964 | remove_and_add_spares(rdev->mddev, rdev); | |
2965 | } | |
45dc2de1 N |
2966 | if (rdev->raid_disk >= 0) |
2967 | err = -EBUSY; | |
2968 | else { | |
fd01b88c | 2969 | struct mddev *mddev = rdev->mddev; |
45dc2de1 | 2970 | err = 0; |
a9720903 GJ |
2971 | if (mddev_is_clustered(mddev)) |
2972 | err = md_cluster_ops->remove_disk(mddev, rdev); | |
2973 | ||
2974 | if (err == 0) { | |
2975 | md_kick_rdev_from_array(rdev); | |
060b0689 | 2976 | if (mddev->pers) { |
2953079c | 2977 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
2978 | md_wakeup_thread(mddev->thread); |
2979 | } | |
a9720903 GJ |
2980 | md_new_event(mddev); |
2981 | } | |
45dc2de1 | 2982 | } |
f655675b N |
2983 | } else if (cmd_match(buf, "writemostly")) { |
2984 | set_bit(WriteMostly, &rdev->flags); | |
404659cf | 2985 | mddev_create_serial_pool(rdev->mddev, rdev, false); |
f655675b N |
2986 | err = 0; |
2987 | } else if (cmd_match(buf, "-writemostly")) { | |
11d3a9f6 | 2988 | mddev_destroy_serial_pool(rdev->mddev, rdev, false); |
f655675b | 2989 | clear_bit(WriteMostly, &rdev->flags); |
6bfe0b49 DW |
2990 | err = 0; |
2991 | } else if (cmd_match(buf, "blocked")) { | |
2992 | set_bit(Blocked, &rdev->flags); | |
2993 | err = 0; | |
2994 | } else if (cmd_match(buf, "-blocked")) { | |
de393cde | 2995 | if (!test_bit(Faulty, &rdev->flags) && |
dcbcb486 | 2996 | !test_bit(ExternalBbl, &rdev->flags) && |
7da64a0a | 2997 | rdev->badblocks.unacked_exist) { |
de393cde N |
2998 | /* metadata handler doesn't understand badblocks, |
2999 | * so we need to fail the device | |
3000 | */ | |
3001 | md_error(rdev->mddev, rdev); | |
3002 | } | |
6bfe0b49 | 3003 | clear_bit(Blocked, &rdev->flags); |
de393cde | 3004 | clear_bit(BlockedBadBlocks, &rdev->flags); |
6bfe0b49 DW |
3005 | wake_up(&rdev->blocked_wait); |
3006 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
3007 | md_wakeup_thread(rdev->mddev->thread); | |
3008 | ||
6d56e278 N |
3009 | err = 0; |
3010 | } else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) { | |
3011 | set_bit(In_sync, &rdev->flags); | |
f655675b | 3012 | err = 0; |
688834e6 N |
3013 | } else if (cmd_match(buf, "failfast")) { |
3014 | set_bit(FailFast, &rdev->flags); | |
3015 | err = 0; | |
3016 | } else if (cmd_match(buf, "-failfast")) { | |
3017 | clear_bit(FailFast, &rdev->flags); | |
3018 | err = 0; | |
f2076e7d SL |
3019 | } else if (cmd_match(buf, "-insync") && rdev->raid_disk >= 0 && |
3020 | !test_bit(Journal, &rdev->flags)) { | |
e1960f8c N |
3021 | if (rdev->mddev->pers == NULL) { |
3022 | clear_bit(In_sync, &rdev->flags); | |
3023 | rdev->saved_raid_disk = rdev->raid_disk; | |
3024 | rdev->raid_disk = -1; | |
3025 | err = 0; | |
3026 | } | |
d7a9d443 N |
3027 | } else if (cmd_match(buf, "write_error")) { |
3028 | set_bit(WriteErrorSeen, &rdev->flags); | |
3029 | err = 0; | |
3030 | } else if (cmd_match(buf, "-write_error")) { | |
3031 | clear_bit(WriteErrorSeen, &rdev->flags); | |
3032 | err = 0; | |
2d78f8c4 N |
3033 | } else if (cmd_match(buf, "want_replacement")) { |
3034 | /* Any non-spare device that is not a replacement can | |
3035 | * become want_replacement at any time, but we then need to | |
3036 | * check if recovery is needed. | |
3037 | */ | |
3038 | if (rdev->raid_disk >= 0 && | |
f2076e7d | 3039 | !test_bit(Journal, &rdev->flags) && |
2d78f8c4 N |
3040 | !test_bit(Replacement, &rdev->flags)) |
3041 | set_bit(WantReplacement, &rdev->flags); | |
3042 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
3043 | md_wakeup_thread(rdev->mddev->thread); | |
3044 | err = 0; | |
3045 | } else if (cmd_match(buf, "-want_replacement")) { | |
3046 | /* Clearing 'want_replacement' is always allowed. | |
3047 | * Once replacements starts it is too late though. | |
3048 | */ | |
3049 | err = 0; | |
3050 | clear_bit(WantReplacement, &rdev->flags); | |
3051 | } else if (cmd_match(buf, "replacement")) { | |
3052 | /* Can only set a device as a replacement when array has not | |
3053 | * yet been started. Once running, replacement is automatic | |
3054 | * from spares, or by assigning 'slot'. | |
3055 | */ | |
3056 | if (rdev->mddev->pers) | |
3057 | err = -EBUSY; | |
3058 | else { | |
3059 | set_bit(Replacement, &rdev->flags); | |
3060 | err = 0; | |
3061 | } | |
3062 | } else if (cmd_match(buf, "-replacement")) { | |
3063 | /* Similarly, can only clear Replacement before start */ | |
3064 | if (rdev->mddev->pers) | |
3065 | err = -EBUSY; | |
3066 | else { | |
3067 | clear_bit(Replacement, &rdev->flags); | |
3068 | err = 0; | |
3069 | } | |
a6da4ef8 | 3070 | } else if (cmd_match(buf, "re-add")) { |
ee37e621 YY |
3071 | if (!rdev->mddev->pers) |
3072 | err = -EINVAL; | |
3073 | else if (test_bit(Faulty, &rdev->flags) && (rdev->raid_disk == -1) && | |
3074 | rdev->saved_raid_disk >= 0) { | |
97f6cd39 GR |
3075 | /* clear_bit is performed _after_ all the devices |
3076 | * have their local Faulty bit cleared. If any writes | |
3077 | * happen in the meantime in the local node, they | |
3078 | * will land in the local bitmap, which will be synced | |
3079 | * by this node eventually | |
3080 | */ | |
3081 | if (!mddev_is_clustered(rdev->mddev) || | |
3082 | (err = md_cluster_ops->gather_bitmaps(rdev)) == 0) { | |
3083 | clear_bit(Faulty, &rdev->flags); | |
3084 | err = add_bound_rdev(rdev); | |
3085 | } | |
a6da4ef8 GR |
3086 | } else |
3087 | err = -EBUSY; | |
35b785f7 TM |
3088 | } else if (cmd_match(buf, "external_bbl") && (rdev->mddev->external)) { |
3089 | set_bit(ExternalBbl, &rdev->flags); | |
3090 | rdev->badblocks.shift = 0; | |
3091 | err = 0; | |
3092 | } else if (cmd_match(buf, "-external_bbl") && (rdev->mddev->external)) { | |
3093 | clear_bit(ExternalBbl, &rdev->flags); | |
3094 | err = 0; | |
45dc2de1 | 3095 | } |
00bcb4ac N |
3096 | if (!err) |
3097 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
45dc2de1 N |
3098 | return err ? err : len; |
3099 | } | |
80ca3a44 | 3100 | static struct rdev_sysfs_entry rdev_state = |
750f199e | 3101 | __ATTR_PREALLOC(state, S_IRUGO|S_IWUSR, state_show, state_store); |
86e6ffdd | 3102 | |
4dbcdc75 | 3103 | static ssize_t |
3cb03002 | 3104 | errors_show(struct md_rdev *rdev, char *page) |
4dbcdc75 N |
3105 | { |
3106 | return sprintf(page, "%d\n", atomic_read(&rdev->corrected_errors)); | |
3107 | } | |
3108 | ||
3109 | static ssize_t | |
3cb03002 | 3110 | errors_store(struct md_rdev *rdev, const char *buf, size_t len) |
4dbcdc75 | 3111 | { |
4c9309c0 AD |
3112 | unsigned int n; |
3113 | int rv; | |
3114 | ||
3115 | rv = kstrtouint(buf, 10, &n); | |
3116 | if (rv < 0) | |
3117 | return rv; | |
3118 | atomic_set(&rdev->corrected_errors, n); | |
3119 | return len; | |
4dbcdc75 N |
3120 | } |
3121 | static struct rdev_sysfs_entry rdev_errors = | |
80ca3a44 | 3122 | __ATTR(errors, S_IRUGO|S_IWUSR, errors_show, errors_store); |
4dbcdc75 | 3123 | |
014236d2 | 3124 | static ssize_t |
3cb03002 | 3125 | slot_show(struct md_rdev *rdev, char *page) |
014236d2 | 3126 | { |
f2076e7d SL |
3127 | if (test_bit(Journal, &rdev->flags)) |
3128 | return sprintf(page, "journal\n"); | |
3129 | else if (rdev->raid_disk < 0) | |
014236d2 N |
3130 | return sprintf(page, "none\n"); |
3131 | else | |
3132 | return sprintf(page, "%d\n", rdev->raid_disk); | |
3133 | } | |
3134 | ||
3135 | static ssize_t | |
3cb03002 | 3136 | slot_store(struct md_rdev *rdev, const char *buf, size_t len) |
014236d2 | 3137 | { |
4c9309c0 | 3138 | int slot; |
c303da6d | 3139 | int err; |
4c9309c0 | 3140 | |
f2076e7d SL |
3141 | if (test_bit(Journal, &rdev->flags)) |
3142 | return -EBUSY; | |
014236d2 N |
3143 | if (strncmp(buf, "none", 4)==0) |
3144 | slot = -1; | |
4c9309c0 AD |
3145 | else { |
3146 | err = kstrtouint(buf, 10, (unsigned int *)&slot); | |
3147 | if (err < 0) | |
3148 | return err; | |
3149 | } | |
6c2fce2e | 3150 | if (rdev->mddev->pers && slot == -1) { |
c303da6d N |
3151 | /* Setting 'slot' on an active array requires also |
3152 | * updating the 'rd%d' link, and communicating | |
3153 | * with the personality with ->hot_*_disk. | |
3154 | * For now we only support removing | |
3155 | * failed/spare devices. This normally happens automatically, | |
3156 | * but not when the metadata is externally managed. | |
3157 | */ | |
c303da6d N |
3158 | if (rdev->raid_disk == -1) |
3159 | return -EEXIST; | |
3160 | /* personality does all needed checks */ | |
01393f3d | 3161 | if (rdev->mddev->pers->hot_remove_disk == NULL) |
c303da6d | 3162 | return -EINVAL; |
746d3207 N |
3163 | clear_bit(Blocked, &rdev->flags); |
3164 | remove_and_add_spares(rdev->mddev, rdev); | |
3165 | if (rdev->raid_disk >= 0) | |
3166 | return -EBUSY; | |
c303da6d N |
3167 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); |
3168 | md_wakeup_thread(rdev->mddev->thread); | |
6c2fce2e | 3169 | } else if (rdev->mddev->pers) { |
6c2fce2e | 3170 | /* Activating a spare .. or possibly reactivating |
6d56e278 | 3171 | * if we ever get bitmaps working here. |
6c2fce2e | 3172 | */ |
cb01c549 | 3173 | int err; |
6c2fce2e NB |
3174 | |
3175 | if (rdev->raid_disk != -1) | |
3176 | return -EBUSY; | |
3177 | ||
c6751b2b N |
3178 | if (test_bit(MD_RECOVERY_RUNNING, &rdev->mddev->recovery)) |
3179 | return -EBUSY; | |
3180 | ||
6c2fce2e NB |
3181 | if (rdev->mddev->pers->hot_add_disk == NULL) |
3182 | return -EINVAL; | |
3183 | ||
ba1b41b6 N |
3184 | if (slot >= rdev->mddev->raid_disks && |
3185 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
3186 | return -ENOSPC; | |
3187 | ||
6c2fce2e NB |
3188 | rdev->raid_disk = slot; |
3189 | if (test_bit(In_sync, &rdev->flags)) | |
3190 | rdev->saved_raid_disk = slot; | |
3191 | else | |
3192 | rdev->saved_raid_disk = -1; | |
d30519fc | 3193 | clear_bit(In_sync, &rdev->flags); |
8313b8e5 | 3194 | clear_bit(Bitmap_sync, &rdev->flags); |
3f79cc22 | 3195 | err = rdev->mddev->pers->hot_add_disk(rdev->mddev, rdev); |
cb01c549 GR |
3196 | if (err) { |
3197 | rdev->raid_disk = -1; | |
3198 | return err; | |
3199 | } else | |
3200 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
3201 | if (sysfs_link_rdev(rdev->mddev, rdev)) | |
3202 | /* failure here is OK */; | |
6c2fce2e | 3203 | /* don't wakeup anyone, leave that to userspace. */ |
c303da6d | 3204 | } else { |
ba1b41b6 N |
3205 | if (slot >= rdev->mddev->raid_disks && |
3206 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
c303da6d N |
3207 | return -ENOSPC; |
3208 | rdev->raid_disk = slot; | |
3209 | /* assume it is working */ | |
c5d79adb N |
3210 | clear_bit(Faulty, &rdev->flags); |
3211 | clear_bit(WriteMostly, &rdev->flags); | |
c303da6d | 3212 | set_bit(In_sync, &rdev->flags); |
00bcb4ac | 3213 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
c303da6d | 3214 | } |
014236d2 N |
3215 | return len; |
3216 | } | |
3217 | ||
014236d2 | 3218 | static struct rdev_sysfs_entry rdev_slot = |
80ca3a44 | 3219 | __ATTR(slot, S_IRUGO|S_IWUSR, slot_show, slot_store); |
014236d2 | 3220 | |
93c8cad0 | 3221 | static ssize_t |
3cb03002 | 3222 | offset_show(struct md_rdev *rdev, char *page) |
93c8cad0 | 3223 | { |
6961ece4 | 3224 | return sprintf(page, "%llu\n", (unsigned long long)rdev->data_offset); |
93c8cad0 N |
3225 | } |
3226 | ||
3227 | static ssize_t | |
3cb03002 | 3228 | offset_store(struct md_rdev *rdev, const char *buf, size_t len) |
93c8cad0 | 3229 | { |
c6563a8c | 3230 | unsigned long long offset; |
b29bebd6 | 3231 | if (kstrtoull(buf, 10, &offset) < 0) |
93c8cad0 | 3232 | return -EINVAL; |
8ed0a521 | 3233 | if (rdev->mddev->pers && rdev->raid_disk >= 0) |
93c8cad0 | 3234 | return -EBUSY; |
dd8ac336 | 3235 | if (rdev->sectors && rdev->mddev->external) |
c5d79adb N |
3236 | /* Must set offset before size, so overlap checks |
3237 | * can be sane */ | |
3238 | return -EBUSY; | |
93c8cad0 | 3239 | rdev->data_offset = offset; |
25f7fd47 | 3240 | rdev->new_data_offset = offset; |
93c8cad0 N |
3241 | return len; |
3242 | } | |
3243 | ||
3244 | static struct rdev_sysfs_entry rdev_offset = | |
80ca3a44 | 3245 | __ATTR(offset, S_IRUGO|S_IWUSR, offset_show, offset_store); |
93c8cad0 | 3246 | |
c6563a8c N |
3247 | static ssize_t new_offset_show(struct md_rdev *rdev, char *page) |
3248 | { | |
3249 | return sprintf(page, "%llu\n", | |
3250 | (unsigned long long)rdev->new_data_offset); | |
3251 | } | |
3252 | ||
3253 | static ssize_t new_offset_store(struct md_rdev *rdev, | |
3254 | const char *buf, size_t len) | |
3255 | { | |
3256 | unsigned long long new_offset; | |
3257 | struct mddev *mddev = rdev->mddev; | |
3258 | ||
b29bebd6 | 3259 | if (kstrtoull(buf, 10, &new_offset) < 0) |
c6563a8c N |
3260 | return -EINVAL; |
3261 | ||
f851b60d N |
3262 | if (mddev->sync_thread || |
3263 | test_bit(MD_RECOVERY_RUNNING,&mddev->recovery)) | |
c6563a8c N |
3264 | return -EBUSY; |
3265 | if (new_offset == rdev->data_offset) | |
3266 | /* reset is always permitted */ | |
3267 | ; | |
3268 | else if (new_offset > rdev->data_offset) { | |
3269 | /* must not push array size beyond rdev_sectors */ | |
3270 | if (new_offset - rdev->data_offset | |
3271 | + mddev->dev_sectors > rdev->sectors) | |
3272 | return -E2BIG; | |
3273 | } | |
3274 | /* Metadata worries about other space details. */ | |
3275 | ||
3276 | /* decreasing the offset is inconsistent with a backwards | |
3277 | * reshape. | |
3278 | */ | |
3279 | if (new_offset < rdev->data_offset && | |
3280 | mddev->reshape_backwards) | |
3281 | return -EINVAL; | |
3282 | /* Increasing offset is inconsistent with forwards | |
3283 | * reshape. reshape_direction should be set to | |
3284 | * 'backwards' first. | |
3285 | */ | |
3286 | if (new_offset > rdev->data_offset && | |
3287 | !mddev->reshape_backwards) | |
3288 | return -EINVAL; | |
3289 | ||
3290 | if (mddev->pers && mddev->persistent && | |
3291 | !super_types[mddev->major_version] | |
3292 | .allow_new_offset(rdev, new_offset)) | |
3293 | return -E2BIG; | |
3294 | rdev->new_data_offset = new_offset; | |
3295 | if (new_offset > rdev->data_offset) | |
3296 | mddev->reshape_backwards = 1; | |
3297 | else if (new_offset < rdev->data_offset) | |
3298 | mddev->reshape_backwards = 0; | |
3299 | ||
3300 | return len; | |
3301 | } | |
3302 | static struct rdev_sysfs_entry rdev_new_offset = | |
3303 | __ATTR(new_offset, S_IRUGO|S_IWUSR, new_offset_show, new_offset_store); | |
3304 | ||
83303b61 | 3305 | static ssize_t |
3cb03002 | 3306 | rdev_size_show(struct md_rdev *rdev, char *page) |
83303b61 | 3307 | { |
dd8ac336 | 3308 | return sprintf(page, "%llu\n", (unsigned long long)rdev->sectors / 2); |
83303b61 N |
3309 | } |
3310 | ||
c5d79adb N |
3311 | static int overlaps(sector_t s1, sector_t l1, sector_t s2, sector_t l2) |
3312 | { | |
3313 | /* check if two start/length pairs overlap */ | |
3314 | if (s1+l1 <= s2) | |
3315 | return 0; | |
3316 | if (s2+l2 <= s1) | |
3317 | return 0; | |
3318 | return 1; | |
3319 | } | |
3320 | ||
b522adcd DW |
3321 | static int strict_blocks_to_sectors(const char *buf, sector_t *sectors) |
3322 | { | |
3323 | unsigned long long blocks; | |
3324 | sector_t new; | |
3325 | ||
b29bebd6 | 3326 | if (kstrtoull(buf, 10, &blocks) < 0) |
b522adcd DW |
3327 | return -EINVAL; |
3328 | ||
3329 | if (blocks & 1ULL << (8 * sizeof(blocks) - 1)) | |
3330 | return -EINVAL; /* sector conversion overflow */ | |
3331 | ||
3332 | new = blocks * 2; | |
3333 | if (new != blocks * 2) | |
3334 | return -EINVAL; /* unsigned long long to sector_t overflow */ | |
3335 | ||
3336 | *sectors = new; | |
3337 | return 0; | |
3338 | } | |
3339 | ||
83303b61 | 3340 | static ssize_t |
3cb03002 | 3341 | rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len) |
83303b61 | 3342 | { |
fd01b88c | 3343 | struct mddev *my_mddev = rdev->mddev; |
dd8ac336 | 3344 | sector_t oldsectors = rdev->sectors; |
b522adcd | 3345 | sector_t sectors; |
27c529bb | 3346 | |
f2076e7d SL |
3347 | if (test_bit(Journal, &rdev->flags)) |
3348 | return -EBUSY; | |
b522adcd | 3349 | if (strict_blocks_to_sectors(buf, §ors) < 0) |
d7027458 | 3350 | return -EINVAL; |
c6563a8c N |
3351 | if (rdev->data_offset != rdev->new_data_offset) |
3352 | return -EINVAL; /* too confusing */ | |
0cd17fec | 3353 | if (my_mddev->pers && rdev->raid_disk >= 0) { |
d7027458 | 3354 | if (my_mddev->persistent) { |
dd8ac336 AN |
3355 | sectors = super_types[my_mddev->major_version]. |
3356 | rdev_size_change(rdev, sectors); | |
3357 | if (!sectors) | |
0cd17fec | 3358 | return -EBUSY; |
dd8ac336 | 3359 | } else if (!sectors) |
77304d2a | 3360 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9) - |
dd8ac336 | 3361 | rdev->data_offset; |
a6468539 N |
3362 | if (!my_mddev->pers->resize) |
3363 | /* Cannot change size for RAID0 or Linear etc */ | |
3364 | return -EINVAL; | |
0cd17fec | 3365 | } |
dd8ac336 | 3366 | if (sectors < my_mddev->dev_sectors) |
7d3c6f87 | 3367 | return -EINVAL; /* component must fit device */ |
0cd17fec | 3368 | |
dd8ac336 AN |
3369 | rdev->sectors = sectors; |
3370 | if (sectors > oldsectors && my_mddev->external) { | |
8b1afc3d N |
3371 | /* Need to check that all other rdevs with the same |
3372 | * ->bdev do not overlap. 'rcu' is sufficient to walk | |
3373 | * the rdev lists safely. | |
3374 | * This check does not provide a hard guarantee, it | |
3375 | * just helps avoid dangerous mistakes. | |
c5d79adb | 3376 | */ |
fd01b88c | 3377 | struct mddev *mddev; |
c5d79adb | 3378 | int overlap = 0; |
159ec1fc | 3379 | struct list_head *tmp; |
c5d79adb | 3380 | |
8b1afc3d | 3381 | rcu_read_lock(); |
29ac4aa3 | 3382 | for_each_mddev(mddev, tmp) { |
3cb03002 | 3383 | struct md_rdev *rdev2; |
c5d79adb | 3384 | |
dafb20fa | 3385 | rdev_for_each(rdev2, mddev) |
f21e9ff7 N |
3386 | if (rdev->bdev == rdev2->bdev && |
3387 | rdev != rdev2 && | |
3388 | overlaps(rdev->data_offset, rdev->sectors, | |
3389 | rdev2->data_offset, | |
3390 | rdev2->sectors)) { | |
c5d79adb N |
3391 | overlap = 1; |
3392 | break; | |
3393 | } | |
c5d79adb N |
3394 | if (overlap) { |
3395 | mddev_put(mddev); | |
3396 | break; | |
3397 | } | |
3398 | } | |
8b1afc3d | 3399 | rcu_read_unlock(); |
c5d79adb N |
3400 | if (overlap) { |
3401 | /* Someone else could have slipped in a size | |
3402 | * change here, but doing so is just silly. | |
dd8ac336 | 3403 | * We put oldsectors back because we *know* it is |
c5d79adb N |
3404 | * safe, and trust userspace not to race with |
3405 | * itself | |
3406 | */ | |
dd8ac336 | 3407 | rdev->sectors = oldsectors; |
c5d79adb N |
3408 | return -EBUSY; |
3409 | } | |
3410 | } | |
83303b61 N |
3411 | return len; |
3412 | } | |
3413 | ||
3414 | static struct rdev_sysfs_entry rdev_size = | |
80ca3a44 | 3415 | __ATTR(size, S_IRUGO|S_IWUSR, rdev_size_show, rdev_size_store); |
83303b61 | 3416 | |
3cb03002 | 3417 | static ssize_t recovery_start_show(struct md_rdev *rdev, char *page) |
06e3c817 DW |
3418 | { |
3419 | unsigned long long recovery_start = rdev->recovery_offset; | |
3420 | ||
3421 | if (test_bit(In_sync, &rdev->flags) || | |
3422 | recovery_start == MaxSector) | |
3423 | return sprintf(page, "none\n"); | |
3424 | ||
3425 | return sprintf(page, "%llu\n", recovery_start); | |
3426 | } | |
3427 | ||
3cb03002 | 3428 | static ssize_t recovery_start_store(struct md_rdev *rdev, const char *buf, size_t len) |
06e3c817 DW |
3429 | { |
3430 | unsigned long long recovery_start; | |
3431 | ||
3432 | if (cmd_match(buf, "none")) | |
3433 | recovery_start = MaxSector; | |
b29bebd6 | 3434 | else if (kstrtoull(buf, 10, &recovery_start)) |
06e3c817 DW |
3435 | return -EINVAL; |
3436 | ||
3437 | if (rdev->mddev->pers && | |
3438 | rdev->raid_disk >= 0) | |
3439 | return -EBUSY; | |
3440 | ||
3441 | rdev->recovery_offset = recovery_start; | |
3442 | if (recovery_start == MaxSector) | |
3443 | set_bit(In_sync, &rdev->flags); | |
3444 | else | |
3445 | clear_bit(In_sync, &rdev->flags); | |
3446 | return len; | |
3447 | } | |
3448 | ||
3449 | static struct rdev_sysfs_entry rdev_recovery_start = | |
3450 | __ATTR(recovery_start, S_IRUGO|S_IWUSR, recovery_start_show, recovery_start_store); | |
3451 | ||
fc974ee2 VV |
3452 | /* sysfs access to bad-blocks list. |
3453 | * We present two files. | |
3454 | * 'bad-blocks' lists sector numbers and lengths of ranges that | |
3455 | * are recorded as bad. The list is truncated to fit within | |
3456 | * the one-page limit of sysfs. | |
3457 | * Writing "sector length" to this file adds an acknowledged | |
3458 | * bad block list. | |
3459 | * 'unacknowledged-bad-blocks' lists bad blocks that have not yet | |
3460 | * been acknowledged. Writing to this file adds bad blocks | |
3461 | * without acknowledging them. This is largely for testing. | |
3462 | */ | |
3cb03002 | 3463 | static ssize_t bb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3464 | { |
3465 | return badblocks_show(&rdev->badblocks, page, 0); | |
3466 | } | |
3cb03002 | 3467 | static ssize_t bb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 | 3468 | { |
de393cde N |
3469 | int rv = badblocks_store(&rdev->badblocks, page, len, 0); |
3470 | /* Maybe that ack was all we needed */ | |
3471 | if (test_and_clear_bit(BlockedBadBlocks, &rdev->flags)) | |
3472 | wake_up(&rdev->blocked_wait); | |
3473 | return rv; | |
16c791a5 N |
3474 | } |
3475 | static struct rdev_sysfs_entry rdev_bad_blocks = | |
3476 | __ATTR(bad_blocks, S_IRUGO|S_IWUSR, bb_show, bb_store); | |
3477 | ||
3cb03002 | 3478 | static ssize_t ubb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3479 | { |
3480 | return badblocks_show(&rdev->badblocks, page, 1); | |
3481 | } | |
3cb03002 | 3482 | static ssize_t ubb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 N |
3483 | { |
3484 | return badblocks_store(&rdev->badblocks, page, len, 1); | |
3485 | } | |
3486 | static struct rdev_sysfs_entry rdev_unack_bad_blocks = | |
3487 | __ATTR(unacknowledged_bad_blocks, S_IRUGO|S_IWUSR, ubb_show, ubb_store); | |
3488 | ||
664aed04 AP |
3489 | static ssize_t |
3490 | ppl_sector_show(struct md_rdev *rdev, char *page) | |
3491 | { | |
3492 | return sprintf(page, "%llu\n", (unsigned long long)rdev->ppl.sector); | |
3493 | } | |
3494 | ||
3495 | static ssize_t | |
3496 | ppl_sector_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3497 | { | |
3498 | unsigned long long sector; | |
3499 | ||
3500 | if (kstrtoull(buf, 10, §or) < 0) | |
3501 | return -EINVAL; | |
3502 | if (sector != (sector_t)sector) | |
3503 | return -EINVAL; | |
3504 | ||
3505 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3506 | rdev->raid_disk >= 0) | |
3507 | return -EBUSY; | |
3508 | ||
3509 | if (rdev->mddev->persistent) { | |
3510 | if (rdev->mddev->major_version == 0) | |
3511 | return -EINVAL; | |
3512 | if ((sector > rdev->sb_start && | |
3513 | sector - rdev->sb_start > S16_MAX) || | |
3514 | (sector < rdev->sb_start && | |
3515 | rdev->sb_start - sector > -S16_MIN)) | |
3516 | return -EINVAL; | |
3517 | rdev->ppl.offset = sector - rdev->sb_start; | |
3518 | } else if (!rdev->mddev->external) { | |
3519 | return -EBUSY; | |
3520 | } | |
3521 | rdev->ppl.sector = sector; | |
3522 | return len; | |
3523 | } | |
3524 | ||
3525 | static struct rdev_sysfs_entry rdev_ppl_sector = | |
3526 | __ATTR(ppl_sector, S_IRUGO|S_IWUSR, ppl_sector_show, ppl_sector_store); | |
3527 | ||
3528 | static ssize_t | |
3529 | ppl_size_show(struct md_rdev *rdev, char *page) | |
3530 | { | |
3531 | return sprintf(page, "%u\n", rdev->ppl.size); | |
3532 | } | |
3533 | ||
3534 | static ssize_t | |
3535 | ppl_size_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3536 | { | |
3537 | unsigned int size; | |
3538 | ||
3539 | if (kstrtouint(buf, 10, &size) < 0) | |
3540 | return -EINVAL; | |
3541 | ||
3542 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3543 | rdev->raid_disk >= 0) | |
3544 | return -EBUSY; | |
3545 | ||
3546 | if (rdev->mddev->persistent) { | |
3547 | if (rdev->mddev->major_version == 0) | |
3548 | return -EINVAL; | |
3549 | if (size > U16_MAX) | |
3550 | return -EINVAL; | |
3551 | } else if (!rdev->mddev->external) { | |
3552 | return -EBUSY; | |
3553 | } | |
3554 | rdev->ppl.size = size; | |
3555 | return len; | |
3556 | } | |
3557 | ||
3558 | static struct rdev_sysfs_entry rdev_ppl_size = | |
3559 | __ATTR(ppl_size, S_IRUGO|S_IWUSR, ppl_size_show, ppl_size_store); | |
3560 | ||
86e6ffdd N |
3561 | static struct attribute *rdev_default_attrs[] = { |
3562 | &rdev_state.attr, | |
4dbcdc75 | 3563 | &rdev_errors.attr, |
014236d2 | 3564 | &rdev_slot.attr, |
93c8cad0 | 3565 | &rdev_offset.attr, |
c6563a8c | 3566 | &rdev_new_offset.attr, |
83303b61 | 3567 | &rdev_size.attr, |
06e3c817 | 3568 | &rdev_recovery_start.attr, |
16c791a5 N |
3569 | &rdev_bad_blocks.attr, |
3570 | &rdev_unack_bad_blocks.attr, | |
664aed04 AP |
3571 | &rdev_ppl_sector.attr, |
3572 | &rdev_ppl_size.attr, | |
86e6ffdd N |
3573 | NULL, |
3574 | }; | |
3575 | static ssize_t | |
3576 | rdev_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
3577 | { | |
3578 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3579 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
86e6ffdd N |
3580 | |
3581 | if (!entry->show) | |
3582 | return -EIO; | |
758bfc8a | 3583 | if (!rdev->mddev) |
168b305b | 3584 | return -ENODEV; |
758bfc8a | 3585 | return entry->show(rdev, page); |
86e6ffdd N |
3586 | } |
3587 | ||
3588 | static ssize_t | |
3589 | rdev_attr_store(struct kobject *kobj, struct attribute *attr, | |
3590 | const char *page, size_t length) | |
3591 | { | |
3592 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3593 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
27c529bb | 3594 | ssize_t rv; |
fd01b88c | 3595 | struct mddev *mddev = rdev->mddev; |
86e6ffdd N |
3596 | |
3597 | if (!entry->store) | |
3598 | return -EIO; | |
67463acb N |
3599 | if (!capable(CAP_SYS_ADMIN)) |
3600 | return -EACCES; | |
c42d3240 | 3601 | rv = mddev ? mddev_lock(mddev) : -ENODEV; |
ca388059 | 3602 | if (!rv) { |
27c529bb | 3603 | if (rdev->mddev == NULL) |
c42d3240 | 3604 | rv = -ENODEV; |
27c529bb N |
3605 | else |
3606 | rv = entry->store(rdev, page, length); | |
6a51830e | 3607 | mddev_unlock(mddev); |
ca388059 N |
3608 | } |
3609 | return rv; | |
86e6ffdd N |
3610 | } |
3611 | ||
3612 | static void rdev_free(struct kobject *ko) | |
3613 | { | |
3cb03002 | 3614 | struct md_rdev *rdev = container_of(ko, struct md_rdev, kobj); |
86e6ffdd N |
3615 | kfree(rdev); |
3616 | } | |
52cf25d0 | 3617 | static const struct sysfs_ops rdev_sysfs_ops = { |
86e6ffdd N |
3618 | .show = rdev_attr_show, |
3619 | .store = rdev_attr_store, | |
3620 | }; | |
3621 | static struct kobj_type rdev_ktype = { | |
3622 | .release = rdev_free, | |
3623 | .sysfs_ops = &rdev_sysfs_ops, | |
3624 | .default_attrs = rdev_default_attrs, | |
3625 | }; | |
3626 | ||
3cb03002 | 3627 | int md_rdev_init(struct md_rdev *rdev) |
e8bb9a83 N |
3628 | { |
3629 | rdev->desc_nr = -1; | |
3630 | rdev->saved_raid_disk = -1; | |
3631 | rdev->raid_disk = -1; | |
3632 | rdev->flags = 0; | |
3633 | rdev->data_offset = 0; | |
c6563a8c | 3634 | rdev->new_data_offset = 0; |
e8bb9a83 | 3635 | rdev->sb_events = 0; |
0e3ef49e | 3636 | rdev->last_read_error = 0; |
2699b672 N |
3637 | rdev->sb_loaded = 0; |
3638 | rdev->bb_page = NULL; | |
e8bb9a83 N |
3639 | atomic_set(&rdev->nr_pending, 0); |
3640 | atomic_set(&rdev->read_errors, 0); | |
3641 | atomic_set(&rdev->corrected_errors, 0); | |
3642 | ||
3643 | INIT_LIST_HEAD(&rdev->same_set); | |
3644 | init_waitqueue_head(&rdev->blocked_wait); | |
2230dfe4 N |
3645 | |
3646 | /* Add space to store bad block list. | |
3647 | * This reserves the space even on arrays where it cannot | |
3648 | * be used - I wonder if that matters | |
3649 | */ | |
fc974ee2 | 3650 | return badblocks_init(&rdev->badblocks, 0); |
e8bb9a83 N |
3651 | } |
3652 | EXPORT_SYMBOL_GPL(md_rdev_init); | |
1da177e4 LT |
3653 | /* |
3654 | * Import a device. If 'super_format' >= 0, then sanity check the superblock | |
3655 | * | |
3656 | * mark the device faulty if: | |
3657 | * | |
3658 | * - the device is nonexistent (zero size) | |
3659 | * - the device has no valid superblock | |
3660 | * | |
3661 | * a faulty rdev _never_ has rdev->sb set. | |
3662 | */ | |
3cb03002 | 3663 | static struct md_rdev *md_import_device(dev_t newdev, int super_format, int super_minor) |
1da177e4 LT |
3664 | { |
3665 | char b[BDEVNAME_SIZE]; | |
3666 | int err; | |
3cb03002 | 3667 | struct md_rdev *rdev; |
1da177e4 LT |
3668 | sector_t size; |
3669 | ||
9ffae0cf | 3670 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
9d48739e | 3671 | if (!rdev) |
1da177e4 | 3672 | return ERR_PTR(-ENOMEM); |
1da177e4 | 3673 | |
2230dfe4 N |
3674 | err = md_rdev_init(rdev); |
3675 | if (err) | |
3676 | goto abort_free; | |
3677 | err = alloc_disk_sb(rdev); | |
3678 | if (err) | |
1da177e4 LT |
3679 | goto abort_free; |
3680 | ||
c5d79adb | 3681 | err = lock_rdev(rdev, newdev, super_format == -2); |
1da177e4 LT |
3682 | if (err) |
3683 | goto abort_free; | |
3684 | ||
f9cb074b | 3685 | kobject_init(&rdev->kobj, &rdev_ktype); |
86e6ffdd | 3686 | |
77304d2a | 3687 | size = i_size_read(rdev->bdev->bd_inode) >> BLOCK_SIZE_BITS; |
1da177e4 | 3688 | if (!size) { |
9d48739e | 3689 | pr_warn("md: %s has zero or unknown size, marking faulty!\n", |
1da177e4 LT |
3690 | bdevname(rdev->bdev,b)); |
3691 | err = -EINVAL; | |
3692 | goto abort_free; | |
3693 | } | |
3694 | ||
3695 | if (super_format >= 0) { | |
3696 | err = super_types[super_format]. | |
3697 | load_super(rdev, NULL, super_minor); | |
3698 | if (err == -EINVAL) { | |
9d48739e | 3699 | pr_warn("md: %s does not have a valid v%d.%d superblock, not importing!\n", |
df968c4e | 3700 | bdevname(rdev->bdev,b), |
9d48739e | 3701 | super_format, super_minor); |
1da177e4 LT |
3702 | goto abort_free; |
3703 | } | |
3704 | if (err < 0) { | |
9d48739e | 3705 | pr_warn("md: could not read %s's sb, not importing!\n", |
1da177e4 LT |
3706 | bdevname(rdev->bdev,b)); |
3707 | goto abort_free; | |
3708 | } | |
3709 | } | |
6bfe0b49 | 3710 | |
1da177e4 LT |
3711 | return rdev; |
3712 | ||
3713 | abort_free: | |
2699b672 N |
3714 | if (rdev->bdev) |
3715 | unlock_rdev(rdev); | |
545c8795 | 3716 | md_rdev_clear(rdev); |
1da177e4 LT |
3717 | kfree(rdev); |
3718 | return ERR_PTR(err); | |
3719 | } | |
3720 | ||
3721 | /* | |
3722 | * Check a full RAID array for plausibility | |
3723 | */ | |
3724 | ||
6a5cb53a | 3725 | static int analyze_sbs(struct mddev *mddev) |
1da177e4 LT |
3726 | { |
3727 | int i; | |
3cb03002 | 3728 | struct md_rdev *rdev, *freshest, *tmp; |
1da177e4 LT |
3729 | char b[BDEVNAME_SIZE]; |
3730 | ||
3731 | freshest = NULL; | |
dafb20fa | 3732 | rdev_for_each_safe(rdev, tmp, mddev) |
1da177e4 LT |
3733 | switch (super_types[mddev->major_version]. |
3734 | load_super(rdev, freshest, mddev->minor_version)) { | |
3735 | case 1: | |
3736 | freshest = rdev; | |
3737 | break; | |
3738 | case 0: | |
3739 | break; | |
3740 | default: | |
9d48739e | 3741 | pr_warn("md: fatal superblock inconsistency in %s -- removing from array\n", |
1da177e4 | 3742 | bdevname(rdev->bdev,b)); |
fb56dfef | 3743 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3744 | } |
3745 | ||
6a5cb53a YY |
3746 | /* Cannot find a valid fresh disk */ |
3747 | if (!freshest) { | |
3748 | pr_warn("md: cannot find a valid disk\n"); | |
3749 | return -EINVAL; | |
3750 | } | |
3751 | ||
1da177e4 LT |
3752 | super_types[mddev->major_version]. |
3753 | validate_super(mddev, freshest); | |
3754 | ||
3755 | i = 0; | |
dafb20fa | 3756 | rdev_for_each_safe(rdev, tmp, mddev) { |
233fca36 N |
3757 | if (mddev->max_disks && |
3758 | (rdev->desc_nr >= mddev->max_disks || | |
3759 | i > mddev->max_disks)) { | |
9d48739e N |
3760 | pr_warn("md: %s: %s: only %d devices permitted\n", |
3761 | mdname(mddev), bdevname(rdev->bdev, b), | |
3762 | mddev->max_disks); | |
fb56dfef | 3763 | md_kick_rdev_from_array(rdev); |
de01dfad N |
3764 | continue; |
3765 | } | |
1aee41f6 | 3766 | if (rdev != freshest) { |
1da177e4 LT |
3767 | if (super_types[mddev->major_version]. |
3768 | validate_super(mddev, rdev)) { | |
9d48739e | 3769 | pr_warn("md: kicking non-fresh %s from array!\n", |
1da177e4 | 3770 | bdevname(rdev->bdev,b)); |
fb56dfef | 3771 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3772 | continue; |
3773 | } | |
1aee41f6 | 3774 | } |
1da177e4 LT |
3775 | if (mddev->level == LEVEL_MULTIPATH) { |
3776 | rdev->desc_nr = i++; | |
3777 | rdev->raid_disk = rdev->desc_nr; | |
b2d444d7 | 3778 | set_bit(In_sync, &rdev->flags); |
f2076e7d SL |
3779 | } else if (rdev->raid_disk >= |
3780 | (mddev->raid_disks - min(0, mddev->delta_disks)) && | |
3781 | !test_bit(Journal, &rdev->flags)) { | |
a778b73f N |
3782 | rdev->raid_disk = -1; |
3783 | clear_bit(In_sync, &rdev->flags); | |
1da177e4 LT |
3784 | } |
3785 | } | |
6a5cb53a YY |
3786 | |
3787 | return 0; | |
1da177e4 LT |
3788 | } |
3789 | ||
72e02075 N |
3790 | /* Read a fixed-point number. |
3791 | * Numbers in sysfs attributes should be in "standard" units where | |
3792 | * possible, so time should be in seconds. | |
f72ffdd6 | 3793 | * However we internally use a a much smaller unit such as |
72e02075 N |
3794 | * milliseconds or jiffies. |
3795 | * This function takes a decimal number with a possible fractional | |
3796 | * component, and produces an integer which is the result of | |
3797 | * multiplying that number by 10^'scale'. | |
3798 | * all without any floating-point arithmetic. | |
3799 | */ | |
3800 | int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale) | |
3801 | { | |
3802 | unsigned long result = 0; | |
3803 | long decimals = -1; | |
3804 | while (isdigit(*cp) || (*cp == '.' && decimals < 0)) { | |
3805 | if (*cp == '.') | |
3806 | decimals = 0; | |
3807 | else if (decimals < scale) { | |
3808 | unsigned int value; | |
3809 | value = *cp - '0'; | |
3810 | result = result * 10 + value; | |
3811 | if (decimals >= 0) | |
3812 | decimals++; | |
3813 | } | |
3814 | cp++; | |
3815 | } | |
3816 | if (*cp == '\n') | |
3817 | cp++; | |
3818 | if (*cp) | |
3819 | return -EINVAL; | |
3820 | if (decimals < 0) | |
3821 | decimals = 0; | |
cf891607 | 3822 | *res = result * int_pow(10, scale - decimals); |
72e02075 N |
3823 | return 0; |
3824 | } | |
3825 | ||
16f17b39 | 3826 | static ssize_t |
fd01b88c | 3827 | safe_delay_show(struct mddev *mddev, char *page) |
16f17b39 N |
3828 | { |
3829 | int msec = (mddev->safemode_delay*1000)/HZ; | |
3830 | return sprintf(page, "%d.%03d\n", msec/1000, msec%1000); | |
3831 | } | |
3832 | static ssize_t | |
fd01b88c | 3833 | safe_delay_store(struct mddev *mddev, const char *cbuf, size_t len) |
16f17b39 | 3834 | { |
16f17b39 | 3835 | unsigned long msec; |
97ce0a7f | 3836 | |
28c1b9fd | 3837 | if (mddev_is_clustered(mddev)) { |
9d48739e | 3838 | pr_warn("md: Safemode is disabled for clustered mode\n"); |
28c1b9fd GR |
3839 | return -EINVAL; |
3840 | } | |
3841 | ||
72e02075 | 3842 | if (strict_strtoul_scaled(cbuf, &msec, 3) < 0) |
16f17b39 | 3843 | return -EINVAL; |
16f17b39 N |
3844 | if (msec == 0) |
3845 | mddev->safemode_delay = 0; | |
3846 | else { | |
19052c0e | 3847 | unsigned long old_delay = mddev->safemode_delay; |
1b30e66f N |
3848 | unsigned long new_delay = (msec*HZ)/1000; |
3849 | ||
3850 | if (new_delay == 0) | |
3851 | new_delay = 1; | |
3852 | mddev->safemode_delay = new_delay; | |
3853 | if (new_delay < old_delay || old_delay == 0) | |
3854 | mod_timer(&mddev->safemode_timer, jiffies+1); | |
16f17b39 N |
3855 | } |
3856 | return len; | |
3857 | } | |
3858 | static struct md_sysfs_entry md_safe_delay = | |
80ca3a44 | 3859 | __ATTR(safe_mode_delay, S_IRUGO|S_IWUSR,safe_delay_show, safe_delay_store); |
16f17b39 | 3860 | |
eae1701f | 3861 | static ssize_t |
fd01b88c | 3862 | level_show(struct mddev *mddev, char *page) |
eae1701f | 3863 | { |
36d091f4 N |
3864 | struct md_personality *p; |
3865 | int ret; | |
3866 | spin_lock(&mddev->lock); | |
3867 | p = mddev->pers; | |
d9d166c2 | 3868 | if (p) |
36d091f4 | 3869 | ret = sprintf(page, "%s\n", p->name); |
d9d166c2 | 3870 | else if (mddev->clevel[0]) |
36d091f4 | 3871 | ret = sprintf(page, "%s\n", mddev->clevel); |
d9d166c2 | 3872 | else if (mddev->level != LEVEL_NONE) |
36d091f4 | 3873 | ret = sprintf(page, "%d\n", mddev->level); |
d9d166c2 | 3874 | else |
36d091f4 N |
3875 | ret = 0; |
3876 | spin_unlock(&mddev->lock); | |
3877 | return ret; | |
eae1701f N |
3878 | } |
3879 | ||
d9d166c2 | 3880 | static ssize_t |
fd01b88c | 3881 | level_store(struct mddev *mddev, const char *buf, size_t len) |
d9d166c2 | 3882 | { |
f2859af6 | 3883 | char clevel[16]; |
6791875e N |
3884 | ssize_t rv; |
3885 | size_t slen = len; | |
db721d32 | 3886 | struct md_personality *pers, *oldpers; |
f2859af6 | 3887 | long level; |
db721d32 | 3888 | void *priv, *oldpriv; |
3cb03002 | 3889 | struct md_rdev *rdev; |
245f46c2 | 3890 | |
6791875e N |
3891 | if (slen == 0 || slen >= sizeof(clevel)) |
3892 | return -EINVAL; | |
3893 | ||
3894 | rv = mddev_lock(mddev); | |
3895 | if (rv) | |
3896 | return rv; | |
3897 | ||
245f46c2 | 3898 | if (mddev->pers == NULL) { |
6791875e N |
3899 | strncpy(mddev->clevel, buf, slen); |
3900 | if (mddev->clevel[slen-1] == '\n') | |
3901 | slen--; | |
3902 | mddev->clevel[slen] = 0; | |
245f46c2 | 3903 | mddev->level = LEVEL_NONE; |
6791875e N |
3904 | rv = len; |
3905 | goto out_unlock; | |
245f46c2 | 3906 | } |
6791875e | 3907 | rv = -EROFS; |
bd8839e0 | 3908 | if (mddev->ro) |
6791875e | 3909 | goto out_unlock; |
245f46c2 N |
3910 | |
3911 | /* request to change the personality. Need to ensure: | |
3912 | * - array is not engaged in resync/recovery/reshape | |
3913 | * - old personality can be suspended | |
3914 | * - new personality will access other array. | |
3915 | */ | |
3916 | ||
6791875e | 3917 | rv = -EBUSY; |
bb4f1e9d | 3918 | if (mddev->sync_thread || |
f851b60d | 3919 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
bb4f1e9d N |
3920 | mddev->reshape_position != MaxSector || |
3921 | mddev->sysfs_active) | |
6791875e | 3922 | goto out_unlock; |
245f46c2 | 3923 | |
6791875e | 3924 | rv = -EINVAL; |
245f46c2 | 3925 | if (!mddev->pers->quiesce) { |
9d48739e N |
3926 | pr_warn("md: %s: %s does not support online personality change\n", |
3927 | mdname(mddev), mddev->pers->name); | |
6791875e | 3928 | goto out_unlock; |
245f46c2 N |
3929 | } |
3930 | ||
3931 | /* Now find the new personality */ | |
6791875e N |
3932 | strncpy(clevel, buf, slen); |
3933 | if (clevel[slen-1] == '\n') | |
3934 | slen--; | |
3935 | clevel[slen] = 0; | |
b29bebd6 | 3936 | if (kstrtol(clevel, 10, &level)) |
f2859af6 | 3937 | level = LEVEL_NONE; |
245f46c2 | 3938 | |
f2859af6 DW |
3939 | if (request_module("md-%s", clevel) != 0) |
3940 | request_module("md-level-%s", clevel); | |
245f46c2 | 3941 | spin_lock(&pers_lock); |
f2859af6 | 3942 | pers = find_pers(level, clevel); |
245f46c2 N |
3943 | if (!pers || !try_module_get(pers->owner)) { |
3944 | spin_unlock(&pers_lock); | |
9d48739e | 3945 | pr_warn("md: personality %s not loaded\n", clevel); |
6791875e N |
3946 | rv = -EINVAL; |
3947 | goto out_unlock; | |
245f46c2 N |
3948 | } |
3949 | spin_unlock(&pers_lock); | |
3950 | ||
3951 | if (pers == mddev->pers) { | |
3952 | /* Nothing to do! */ | |
3953 | module_put(pers->owner); | |
6791875e N |
3954 | rv = len; |
3955 | goto out_unlock; | |
245f46c2 N |
3956 | } |
3957 | if (!pers->takeover) { | |
3958 | module_put(pers->owner); | |
9d48739e N |
3959 | pr_warn("md: %s: %s does not support personality takeover\n", |
3960 | mdname(mddev), clevel); | |
6791875e N |
3961 | rv = -EINVAL; |
3962 | goto out_unlock; | |
245f46c2 N |
3963 | } |
3964 | ||
dafb20fa | 3965 | rdev_for_each(rdev, mddev) |
e93f68a1 N |
3966 | rdev->new_raid_disk = rdev->raid_disk; |
3967 | ||
245f46c2 N |
3968 | /* ->takeover must set new_* and/or delta_disks |
3969 | * if it succeeds, and may set them when it fails. | |
3970 | */ | |
3971 | priv = pers->takeover(mddev); | |
3972 | if (IS_ERR(priv)) { | |
3973 | mddev->new_level = mddev->level; | |
3974 | mddev->new_layout = mddev->layout; | |
664e7c41 | 3975 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
245f46c2 N |
3976 | mddev->raid_disks -= mddev->delta_disks; |
3977 | mddev->delta_disks = 0; | |
2c810cdd | 3978 | mddev->reshape_backwards = 0; |
245f46c2 | 3979 | module_put(pers->owner); |
9d48739e N |
3980 | pr_warn("md: %s: %s would not accept array\n", |
3981 | mdname(mddev), clevel); | |
6791875e N |
3982 | rv = PTR_ERR(priv); |
3983 | goto out_unlock; | |
245f46c2 N |
3984 | } |
3985 | ||
3986 | /* Looks like we have a winner */ | |
3987 | mddev_suspend(mddev); | |
5aa61f42 | 3988 | mddev_detach(mddev); |
36d091f4 N |
3989 | |
3990 | spin_lock(&mddev->lock); | |
db721d32 N |
3991 | oldpers = mddev->pers; |
3992 | oldpriv = mddev->private; | |
3993 | mddev->pers = pers; | |
3994 | mddev->private = priv; | |
3995 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); | |
3996 | mddev->level = mddev->new_level; | |
3997 | mddev->layout = mddev->new_layout; | |
3998 | mddev->chunk_sectors = mddev->new_chunk_sectors; | |
3999 | mddev->delta_disks = 0; | |
4000 | mddev->reshape_backwards = 0; | |
4001 | mddev->degraded = 0; | |
36d091f4 | 4002 | spin_unlock(&mddev->lock); |
db721d32 N |
4003 | |
4004 | if (oldpers->sync_request == NULL && | |
4005 | mddev->external) { | |
4006 | /* We are converting from a no-redundancy array | |
4007 | * to a redundancy array and metadata is managed | |
4008 | * externally so we need to be sure that writes | |
4009 | * won't block due to a need to transition | |
4010 | * clean->dirty | |
4011 | * until external management is started. | |
4012 | */ | |
4013 | mddev->in_sync = 0; | |
4014 | mddev->safemode_delay = 0; | |
4015 | mddev->safemode = 0; | |
4016 | } | |
f72ffdd6 | 4017 | |
db721d32 N |
4018 | oldpers->free(mddev, oldpriv); |
4019 | ||
4020 | if (oldpers->sync_request == NULL && | |
a64c876f N |
4021 | pers->sync_request != NULL) { |
4022 | /* need to add the md_redundancy_group */ | |
4023 | if (sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
4024 | pr_warn("md: cannot register extra attributes for %s\n", |
4025 | mdname(mddev)); | |
388975cc | 4026 | mddev->sysfs_action = sysfs_get_dirent(mddev->kobj.sd, "sync_action"); |
f72ffdd6 | 4027 | } |
db721d32 | 4028 | if (oldpers->sync_request != NULL && |
a64c876f N |
4029 | pers->sync_request == NULL) { |
4030 | /* need to remove the md_redundancy_group */ | |
4031 | if (mddev->to_remove == NULL) | |
4032 | mddev->to_remove = &md_redundancy_group; | |
4033 | } | |
4034 | ||
4cb9da7d AO |
4035 | module_put(oldpers->owner); |
4036 | ||
dafb20fa | 4037 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
4038 | if (rdev->raid_disk < 0) |
4039 | continue; | |
bf2cb0da | 4040 | if (rdev->new_raid_disk >= mddev->raid_disks) |
e93f68a1 N |
4041 | rdev->new_raid_disk = -1; |
4042 | if (rdev->new_raid_disk == rdev->raid_disk) | |
4043 | continue; | |
36fad858 | 4044 | sysfs_unlink_rdev(mddev, rdev); |
e93f68a1 | 4045 | } |
dafb20fa | 4046 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
4047 | if (rdev->raid_disk < 0) |
4048 | continue; | |
4049 | if (rdev->new_raid_disk == rdev->raid_disk) | |
4050 | continue; | |
4051 | rdev->raid_disk = rdev->new_raid_disk; | |
4052 | if (rdev->raid_disk < 0) | |
3a981b03 | 4053 | clear_bit(In_sync, &rdev->flags); |
e93f68a1 | 4054 | else { |
36fad858 | 4055 | if (sysfs_link_rdev(mddev, rdev)) |
9d48739e N |
4056 | pr_warn("md: cannot register rd%d for %s after level change\n", |
4057 | rdev->raid_disk, mdname(mddev)); | |
3a981b03 | 4058 | } |
e93f68a1 N |
4059 | } |
4060 | ||
db721d32 | 4061 | if (pers->sync_request == NULL) { |
9af204cf TM |
4062 | /* this is now an array without redundancy, so |
4063 | * it must always be in_sync | |
4064 | */ | |
4065 | mddev->in_sync = 1; | |
4066 | del_timer_sync(&mddev->safemode_timer); | |
4067 | } | |
02e5f5c0 | 4068 | blk_set_stacking_limits(&mddev->queue->limits); |
245f46c2 | 4069 | pers->run(mddev); |
2953079c | 4070 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
47525e59 | 4071 | mddev_resume(mddev); |
830778a1 N |
4072 | if (!mddev->thread) |
4073 | md_update_sb(mddev, 1); | |
5cac7861 | 4074 | sysfs_notify(&mddev->kobj, NULL, "level"); |
bb7f8d22 | 4075 | md_new_event(mddev); |
6791875e N |
4076 | rv = len; |
4077 | out_unlock: | |
4078 | mddev_unlock(mddev); | |
d9d166c2 N |
4079 | return rv; |
4080 | } | |
4081 | ||
4082 | static struct md_sysfs_entry md_level = | |
80ca3a44 | 4083 | __ATTR(level, S_IRUGO|S_IWUSR, level_show, level_store); |
eae1701f | 4084 | |
d4dbd025 | 4085 | static ssize_t |
fd01b88c | 4086 | layout_show(struct mddev *mddev, char *page) |
d4dbd025 N |
4087 | { |
4088 | /* just a number, not meaningful for all levels */ | |
08a02ecd N |
4089 | if (mddev->reshape_position != MaxSector && |
4090 | mddev->layout != mddev->new_layout) | |
4091 | return sprintf(page, "%d (%d)\n", | |
4092 | mddev->new_layout, mddev->layout); | |
d4dbd025 N |
4093 | return sprintf(page, "%d\n", mddev->layout); |
4094 | } | |
4095 | ||
4096 | static ssize_t | |
fd01b88c | 4097 | layout_store(struct mddev *mddev, const char *buf, size_t len) |
d4dbd025 | 4098 | { |
4c9309c0 | 4099 | unsigned int n; |
6791875e | 4100 | int err; |
d4dbd025 | 4101 | |
4c9309c0 AD |
4102 | err = kstrtouint(buf, 10, &n); |
4103 | if (err < 0) | |
4104 | return err; | |
6791875e N |
4105 | err = mddev_lock(mddev); |
4106 | if (err) | |
4107 | return err; | |
d4dbd025 | 4108 | |
b3546035 | 4109 | if (mddev->pers) { |
50ac168a | 4110 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
4111 | err = -EBUSY; |
4112 | else if (mddev->ro) | |
4113 | err = -EROFS; | |
4114 | else { | |
4115 | mddev->new_layout = n; | |
4116 | err = mddev->pers->check_reshape(mddev); | |
4117 | if (err) | |
4118 | mddev->new_layout = mddev->layout; | |
597a711b | 4119 | } |
b3546035 | 4120 | } else { |
08a02ecd | 4121 | mddev->new_layout = n; |
b3546035 N |
4122 | if (mddev->reshape_position == MaxSector) |
4123 | mddev->layout = n; | |
4124 | } | |
6791875e N |
4125 | mddev_unlock(mddev); |
4126 | return err ?: len; | |
d4dbd025 N |
4127 | } |
4128 | static struct md_sysfs_entry md_layout = | |
80ca3a44 | 4129 | __ATTR(layout, S_IRUGO|S_IWUSR, layout_show, layout_store); |
d4dbd025 | 4130 | |
eae1701f | 4131 | static ssize_t |
fd01b88c | 4132 | raid_disks_show(struct mddev *mddev, char *page) |
eae1701f | 4133 | { |
bb636547 N |
4134 | if (mddev->raid_disks == 0) |
4135 | return 0; | |
08a02ecd N |
4136 | if (mddev->reshape_position != MaxSector && |
4137 | mddev->delta_disks != 0) | |
4138 | return sprintf(page, "%d (%d)\n", mddev->raid_disks, | |
4139 | mddev->raid_disks - mddev->delta_disks); | |
eae1701f N |
4140 | return sprintf(page, "%d\n", mddev->raid_disks); |
4141 | } | |
4142 | ||
fd01b88c | 4143 | static int update_raid_disks(struct mddev *mddev, int raid_disks); |
da943b99 N |
4144 | |
4145 | static ssize_t | |
fd01b88c | 4146 | raid_disks_store(struct mddev *mddev, const char *buf, size_t len) |
da943b99 | 4147 | { |
4c9309c0 | 4148 | unsigned int n; |
6791875e | 4149 | int err; |
da943b99 | 4150 | |
4c9309c0 AD |
4151 | err = kstrtouint(buf, 10, &n); |
4152 | if (err < 0) | |
4153 | return err; | |
da943b99 | 4154 | |
6791875e N |
4155 | err = mddev_lock(mddev); |
4156 | if (err) | |
4157 | return err; | |
da943b99 | 4158 | if (mddev->pers) |
6791875e | 4159 | err = update_raid_disks(mddev, n); |
08a02ecd | 4160 | else if (mddev->reshape_position != MaxSector) { |
c6563a8c | 4161 | struct md_rdev *rdev; |
08a02ecd | 4162 | int olddisks = mddev->raid_disks - mddev->delta_disks; |
c6563a8c | 4163 | |
6791875e | 4164 | err = -EINVAL; |
c6563a8c N |
4165 | rdev_for_each(rdev, mddev) { |
4166 | if (olddisks < n && | |
4167 | rdev->data_offset < rdev->new_data_offset) | |
6791875e | 4168 | goto out_unlock; |
c6563a8c N |
4169 | if (olddisks > n && |
4170 | rdev->data_offset > rdev->new_data_offset) | |
6791875e | 4171 | goto out_unlock; |
c6563a8c | 4172 | } |
6791875e | 4173 | err = 0; |
08a02ecd N |
4174 | mddev->delta_disks = n - olddisks; |
4175 | mddev->raid_disks = n; | |
2c810cdd | 4176 | mddev->reshape_backwards = (mddev->delta_disks < 0); |
08a02ecd | 4177 | } else |
da943b99 | 4178 | mddev->raid_disks = n; |
6791875e N |
4179 | out_unlock: |
4180 | mddev_unlock(mddev); | |
4181 | return err ? err : len; | |
da943b99 N |
4182 | } |
4183 | static struct md_sysfs_entry md_raid_disks = | |
80ca3a44 | 4184 | __ATTR(raid_disks, S_IRUGO|S_IWUSR, raid_disks_show, raid_disks_store); |
eae1701f | 4185 | |
3b34380a | 4186 | static ssize_t |
fd01b88c | 4187 | chunk_size_show(struct mddev *mddev, char *page) |
3b34380a | 4188 | { |
08a02ecd | 4189 | if (mddev->reshape_position != MaxSector && |
664e7c41 AN |
4190 | mddev->chunk_sectors != mddev->new_chunk_sectors) |
4191 | return sprintf(page, "%d (%d)\n", | |
4192 | mddev->new_chunk_sectors << 9, | |
9d8f0363 AN |
4193 | mddev->chunk_sectors << 9); |
4194 | return sprintf(page, "%d\n", mddev->chunk_sectors << 9); | |
3b34380a N |
4195 | } |
4196 | ||
4197 | static ssize_t | |
fd01b88c | 4198 | chunk_size_store(struct mddev *mddev, const char *buf, size_t len) |
3b34380a | 4199 | { |
4c9309c0 | 4200 | unsigned long n; |
6791875e | 4201 | int err; |
3b34380a | 4202 | |
4c9309c0 AD |
4203 | err = kstrtoul(buf, 10, &n); |
4204 | if (err < 0) | |
4205 | return err; | |
3b34380a | 4206 | |
6791875e N |
4207 | err = mddev_lock(mddev); |
4208 | if (err) | |
4209 | return err; | |
b3546035 | 4210 | if (mddev->pers) { |
50ac168a | 4211 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
4212 | err = -EBUSY; |
4213 | else if (mddev->ro) | |
4214 | err = -EROFS; | |
4215 | else { | |
4216 | mddev->new_chunk_sectors = n >> 9; | |
4217 | err = mddev->pers->check_reshape(mddev); | |
4218 | if (err) | |
4219 | mddev->new_chunk_sectors = mddev->chunk_sectors; | |
597a711b | 4220 | } |
b3546035 | 4221 | } else { |
664e7c41 | 4222 | mddev->new_chunk_sectors = n >> 9; |
b3546035 | 4223 | if (mddev->reshape_position == MaxSector) |
9d8f0363 | 4224 | mddev->chunk_sectors = n >> 9; |
b3546035 | 4225 | } |
6791875e N |
4226 | mddev_unlock(mddev); |
4227 | return err ?: len; | |
3b34380a N |
4228 | } |
4229 | static struct md_sysfs_entry md_chunk_size = | |
80ca3a44 | 4230 | __ATTR(chunk_size, S_IRUGO|S_IWUSR, chunk_size_show, chunk_size_store); |
3b34380a | 4231 | |
a94213b1 | 4232 | static ssize_t |
fd01b88c | 4233 | resync_start_show(struct mddev *mddev, char *page) |
a94213b1 | 4234 | { |
d1a7c503 N |
4235 | if (mddev->recovery_cp == MaxSector) |
4236 | return sprintf(page, "none\n"); | |
a94213b1 N |
4237 | return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp); |
4238 | } | |
4239 | ||
4240 | static ssize_t | |
fd01b88c | 4241 | resync_start_store(struct mddev *mddev, const char *buf, size_t len) |
a94213b1 | 4242 | { |
4c9309c0 | 4243 | unsigned long long n; |
6791875e | 4244 | int err; |
4c9309c0 AD |
4245 | |
4246 | if (cmd_match(buf, "none")) | |
4247 | n = MaxSector; | |
4248 | else { | |
4249 | err = kstrtoull(buf, 10, &n); | |
4250 | if (err < 0) | |
4251 | return err; | |
4252 | if (n != (sector_t)n) | |
4253 | return -EINVAL; | |
4254 | } | |
a94213b1 | 4255 | |
6791875e N |
4256 | err = mddev_lock(mddev); |
4257 | if (err) | |
4258 | return err; | |
b098636c | 4259 | if (mddev->pers && !test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) |
6791875e | 4260 | err = -EBUSY; |
a94213b1 | 4261 | |
6791875e N |
4262 | if (!err) { |
4263 | mddev->recovery_cp = n; | |
4264 | if (mddev->pers) | |
2953079c | 4265 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
6791875e N |
4266 | } |
4267 | mddev_unlock(mddev); | |
4268 | return err ?: len; | |
a94213b1 N |
4269 | } |
4270 | static struct md_sysfs_entry md_resync_start = | |
750f199e N |
4271 | __ATTR_PREALLOC(resync_start, S_IRUGO|S_IWUSR, |
4272 | resync_start_show, resync_start_store); | |
a94213b1 | 4273 | |
9e653b63 N |
4274 | /* |
4275 | * The array state can be: | |
4276 | * | |
4277 | * clear | |
4278 | * No devices, no size, no level | |
4279 | * Equivalent to STOP_ARRAY ioctl | |
4280 | * inactive | |
4281 | * May have some settings, but array is not active | |
4282 | * all IO results in error | |
4283 | * When written, doesn't tear down array, but just stops it | |
4284 | * suspended (not supported yet) | |
4285 | * All IO requests will block. The array can be reconfigured. | |
910d8cb3 | 4286 | * Writing this, if accepted, will block until array is quiescent |
9e653b63 N |
4287 | * readonly |
4288 | * no resync can happen. no superblocks get written. | |
4289 | * write requests fail | |
4290 | * read-auto | |
4291 | * like readonly, but behaves like 'clean' on a write request. | |
4292 | * | |
4293 | * clean - no pending writes, but otherwise active. | |
4294 | * When written to inactive array, starts without resync | |
4295 | * If a write request arrives then | |
4296 | * if metadata is known, mark 'dirty' and switch to 'active'. | |
4297 | * if not known, block and switch to write-pending | |
4298 | * If written to an active array that has pending writes, then fails. | |
4299 | * active | |
4300 | * fully active: IO and resync can be happening. | |
4301 | * When written to inactive array, starts with resync | |
4302 | * | |
4303 | * write-pending | |
4304 | * clean, but writes are blocked waiting for 'active' to be written. | |
4305 | * | |
4306 | * active-idle | |
4307 | * like active, but no writes have been seen for a while (100msec). | |
4308 | * | |
62f7b198 GP |
4309 | * broken |
4310 | * RAID0/LINEAR-only: same as clean, but array is missing a member. | |
4311 | * It's useful because RAID0/LINEAR mounted-arrays aren't stopped | |
4312 | * when a member is gone, so this state will at least alert the | |
4313 | * user that something is wrong. | |
9e653b63 N |
4314 | */ |
4315 | enum array_state { clear, inactive, suspended, readonly, read_auto, clean, active, | |
62f7b198 | 4316 | write_pending, active_idle, broken, bad_word}; |
05381954 | 4317 | static char *array_states[] = { |
9e653b63 | 4318 | "clear", "inactive", "suspended", "readonly", "read-auto", "clean", "active", |
62f7b198 | 4319 | "write-pending", "active-idle", "broken", NULL }; |
9e653b63 N |
4320 | |
4321 | static int match_word(const char *word, char **list) | |
4322 | { | |
4323 | int n; | |
4324 | for (n=0; list[n]; n++) | |
4325 | if (cmd_match(word, list[n])) | |
4326 | break; | |
4327 | return n; | |
4328 | } | |
4329 | ||
4330 | static ssize_t | |
fd01b88c | 4331 | array_state_show(struct mddev *mddev, char *page) |
9e653b63 N |
4332 | { |
4333 | enum array_state st = inactive; | |
4334 | ||
62f7b198 | 4335 | if (mddev->pers && !test_bit(MD_NOT_READY, &mddev->flags)) { |
9e653b63 N |
4336 | switch(mddev->ro) { |
4337 | case 1: | |
4338 | st = readonly; | |
4339 | break; | |
4340 | case 2: | |
4341 | st = read_auto; | |
4342 | break; | |
4343 | case 0: | |
55cc39f3 | 4344 | spin_lock(&mddev->lock); |
2953079c | 4345 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
e691063a | 4346 | st = write_pending; |
16f88949 TM |
4347 | else if (mddev->in_sync) |
4348 | st = clean; | |
9e653b63 N |
4349 | else if (mddev->safemode) |
4350 | st = active_idle; | |
4351 | else | |
4352 | st = active; | |
55cc39f3 | 4353 | spin_unlock(&mddev->lock); |
9e653b63 | 4354 | } |
62f7b198 GP |
4355 | |
4356 | if (test_bit(MD_BROKEN, &mddev->flags) && st == clean) | |
4357 | st = broken; | |
4358 | } else { | |
9e653b63 N |
4359 | if (list_empty(&mddev->disks) && |
4360 | mddev->raid_disks == 0 && | |
58c0fed4 | 4361 | mddev->dev_sectors == 0) |
9e653b63 N |
4362 | st = clear; |
4363 | else | |
4364 | st = inactive; | |
4365 | } | |
4366 | return sprintf(page, "%s\n", array_states[st]); | |
4367 | } | |
4368 | ||
f72ffdd6 N |
4369 | static int do_md_stop(struct mddev *mddev, int ro, struct block_device *bdev); |
4370 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev); | |
4371 | static int do_md_run(struct mddev *mddev); | |
fd01b88c | 4372 | static int restart_array(struct mddev *mddev); |
9e653b63 N |
4373 | |
4374 | static ssize_t | |
fd01b88c | 4375 | array_state_store(struct mddev *mddev, const char *buf, size_t len) |
9e653b63 | 4376 | { |
6497709b | 4377 | int err = 0; |
9e653b63 | 4378 | enum array_state st = match_word(buf, array_states); |
6791875e N |
4379 | |
4380 | if (mddev->pers && (st == active || st == clean) && mddev->ro != 1) { | |
4381 | /* don't take reconfig_mutex when toggling between | |
4382 | * clean and active | |
4383 | */ | |
4384 | spin_lock(&mddev->lock); | |
4385 | if (st == active) { | |
4386 | restart_array(mddev); | |
2953079c | 4387 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
91a6c4ad | 4388 | md_wakeup_thread(mddev->thread); |
6791875e | 4389 | wake_up(&mddev->sb_wait); |
6791875e N |
4390 | } else /* st == clean */ { |
4391 | restart_array(mddev); | |
6497709b | 4392 | if (!set_in_sync(mddev)) |
6791875e N |
4393 | err = -EBUSY; |
4394 | } | |
573275b5 TM |
4395 | if (!err) |
4396 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
6791875e | 4397 | spin_unlock(&mddev->lock); |
c008f1d3 | 4398 | return err ?: len; |
6791875e N |
4399 | } |
4400 | err = mddev_lock(mddev); | |
4401 | if (err) | |
4402 | return err; | |
4403 | err = -EINVAL; | |
9e653b63 N |
4404 | switch(st) { |
4405 | case bad_word: | |
4406 | break; | |
4407 | case clear: | |
4408 | /* stopping an active array */ | |
a05b7ea0 | 4409 | err = do_md_stop(mddev, 0, NULL); |
9e653b63 N |
4410 | break; |
4411 | case inactive: | |
4412 | /* stopping an active array */ | |
90cf195d | 4413 | if (mddev->pers) |
a05b7ea0 | 4414 | err = do_md_stop(mddev, 2, NULL); |
90cf195d | 4415 | else |
e691063a | 4416 | err = 0; /* already inactive */ |
9e653b63 N |
4417 | break; |
4418 | case suspended: | |
4419 | break; /* not supported yet */ | |
4420 | case readonly: | |
4421 | if (mddev->pers) | |
a05b7ea0 | 4422 | err = md_set_readonly(mddev, NULL); |
9e653b63 N |
4423 | else { |
4424 | mddev->ro = 1; | |
648b629e | 4425 | set_disk_ro(mddev->gendisk, 1); |
9e653b63 N |
4426 | err = do_md_run(mddev); |
4427 | } | |
4428 | break; | |
4429 | case read_auto: | |
9e653b63 | 4430 | if (mddev->pers) { |
80268ee9 | 4431 | if (mddev->ro == 0) |
a05b7ea0 | 4432 | err = md_set_readonly(mddev, NULL); |
80268ee9 | 4433 | else if (mddev->ro == 1) |
648b629e N |
4434 | err = restart_array(mddev); |
4435 | if (err == 0) { | |
4436 | mddev->ro = 2; | |
4437 | set_disk_ro(mddev->gendisk, 0); | |
4438 | } | |
9e653b63 N |
4439 | } else { |
4440 | mddev->ro = 2; | |
4441 | err = do_md_run(mddev); | |
4442 | } | |
4443 | break; | |
4444 | case clean: | |
4445 | if (mddev->pers) { | |
339421de SL |
4446 | err = restart_array(mddev); |
4447 | if (err) | |
4448 | break; | |
85572d7c | 4449 | spin_lock(&mddev->lock); |
6497709b | 4450 | if (!set_in_sync(mddev)) |
e691063a | 4451 | err = -EBUSY; |
85572d7c | 4452 | spin_unlock(&mddev->lock); |
5bf29597 N |
4453 | } else |
4454 | err = -EINVAL; | |
9e653b63 N |
4455 | break; |
4456 | case active: | |
4457 | if (mddev->pers) { | |
339421de SL |
4458 | err = restart_array(mddev); |
4459 | if (err) | |
4460 | break; | |
2953079c | 4461 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
9e653b63 N |
4462 | wake_up(&mddev->sb_wait); |
4463 | err = 0; | |
4464 | } else { | |
4465 | mddev->ro = 0; | |
648b629e | 4466 | set_disk_ro(mddev->gendisk, 0); |
9e653b63 N |
4467 | err = do_md_run(mddev); |
4468 | } | |
4469 | break; | |
4470 | case write_pending: | |
4471 | case active_idle: | |
62f7b198 | 4472 | case broken: |
9e653b63 N |
4473 | /* these cannot be set */ |
4474 | break; | |
4475 | } | |
6791875e N |
4476 | |
4477 | if (!err) { | |
1d23f178 N |
4478 | if (mddev->hold_active == UNTIL_IOCTL) |
4479 | mddev->hold_active = 0; | |
00bcb4ac | 4480 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 4481 | } |
6791875e N |
4482 | mddev_unlock(mddev); |
4483 | return err ?: len; | |
9e653b63 | 4484 | } |
80ca3a44 | 4485 | static struct md_sysfs_entry md_array_state = |
750f199e | 4486 | __ATTR_PREALLOC(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store); |
9e653b63 | 4487 | |
1e50915f | 4488 | static ssize_t |
fd01b88c | 4489 | max_corrected_read_errors_show(struct mddev *mddev, char *page) { |
1e50915f RB |
4490 | return sprintf(page, "%d\n", |
4491 | atomic_read(&mddev->max_corr_read_errors)); | |
4492 | } | |
4493 | ||
4494 | static ssize_t | |
fd01b88c | 4495 | max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len) |
1e50915f | 4496 | { |
4c9309c0 AD |
4497 | unsigned int n; |
4498 | int rv; | |
1e50915f | 4499 | |
4c9309c0 AD |
4500 | rv = kstrtouint(buf, 10, &n); |
4501 | if (rv < 0) | |
4502 | return rv; | |
4503 | atomic_set(&mddev->max_corr_read_errors, n); | |
4504 | return len; | |
1e50915f RB |
4505 | } |
4506 | ||
4507 | static struct md_sysfs_entry max_corr_read_errors = | |
4508 | __ATTR(max_read_errors, S_IRUGO|S_IWUSR, max_corrected_read_errors_show, | |
4509 | max_corrected_read_errors_store); | |
4510 | ||
6d7ff738 | 4511 | static ssize_t |
fd01b88c | 4512 | null_show(struct mddev *mddev, char *page) |
6d7ff738 N |
4513 | { |
4514 | return -EINVAL; | |
4515 | } | |
4516 | ||
cc1ffe61 GJ |
4517 | /* need to ensure rdev_delayed_delete() has completed */ |
4518 | static void flush_rdev_wq(struct mddev *mddev) | |
4519 | { | |
4520 | struct md_rdev *rdev; | |
4521 | ||
4522 | rcu_read_lock(); | |
4523 | rdev_for_each_rcu(rdev, mddev) | |
4524 | if (work_pending(&rdev->del_work)) { | |
4525 | flush_workqueue(md_rdev_misc_wq); | |
4526 | break; | |
4527 | } | |
4528 | rcu_read_unlock(); | |
4529 | } | |
4530 | ||
6d7ff738 | 4531 | static ssize_t |
fd01b88c | 4532 | new_dev_store(struct mddev *mddev, const char *buf, size_t len) |
6d7ff738 N |
4533 | { |
4534 | /* buf must be %d:%d\n? giving major and minor numbers */ | |
4535 | /* The new device is added to the array. | |
4536 | * If the array has a persistent superblock, we read the | |
4537 | * superblock to initialise info and check validity. | |
4538 | * Otherwise, only checking done is that in bind_rdev_to_array, | |
4539 | * which mainly checks size. | |
4540 | */ | |
4541 | char *e; | |
4542 | int major = simple_strtoul(buf, &e, 10); | |
4543 | int minor; | |
4544 | dev_t dev; | |
3cb03002 | 4545 | struct md_rdev *rdev; |
6d7ff738 N |
4546 | int err; |
4547 | ||
4548 | if (!*buf || *e != ':' || !e[1] || e[1] == '\n') | |
4549 | return -EINVAL; | |
4550 | minor = simple_strtoul(e+1, &e, 10); | |
4551 | if (*e && *e != '\n') | |
4552 | return -EINVAL; | |
4553 | dev = MKDEV(major, minor); | |
4554 | if (major != MAJOR(dev) || | |
4555 | minor != MINOR(dev)) | |
4556 | return -EOVERFLOW; | |
4557 | ||
cc1ffe61 | 4558 | flush_rdev_wq(mddev); |
6791875e N |
4559 | err = mddev_lock(mddev); |
4560 | if (err) | |
4561 | return err; | |
6d7ff738 N |
4562 | if (mddev->persistent) { |
4563 | rdev = md_import_device(dev, mddev->major_version, | |
4564 | mddev->minor_version); | |
4565 | if (!IS_ERR(rdev) && !list_empty(&mddev->disks)) { | |
3cb03002 N |
4566 | struct md_rdev *rdev0 |
4567 | = list_entry(mddev->disks.next, | |
4568 | struct md_rdev, same_set); | |
6d7ff738 N |
4569 | err = super_types[mddev->major_version] |
4570 | .load_super(rdev, rdev0, mddev->minor_version); | |
4571 | if (err < 0) | |
4572 | goto out; | |
4573 | } | |
c5d79adb N |
4574 | } else if (mddev->external) |
4575 | rdev = md_import_device(dev, -2, -1); | |
4576 | else | |
6d7ff738 N |
4577 | rdev = md_import_device(dev, -1, -1); |
4578 | ||
9a8c0fa8 N |
4579 | if (IS_ERR(rdev)) { |
4580 | mddev_unlock(mddev); | |
6d7ff738 | 4581 | return PTR_ERR(rdev); |
9a8c0fa8 | 4582 | } |
6d7ff738 N |
4583 | err = bind_rdev_to_array(rdev, mddev); |
4584 | out: | |
4585 | if (err) | |
4586 | export_rdev(rdev); | |
6791875e | 4587 | mddev_unlock(mddev); |
5492c46e AO |
4588 | if (!err) |
4589 | md_new_event(mddev); | |
6d7ff738 N |
4590 | return err ? err : len; |
4591 | } | |
4592 | ||
4593 | static struct md_sysfs_entry md_new_device = | |
80ca3a44 | 4594 | __ATTR(new_dev, S_IWUSR, null_show, new_dev_store); |
3b34380a | 4595 | |
9b1d1dac | 4596 | static ssize_t |
fd01b88c | 4597 | bitmap_store(struct mddev *mddev, const char *buf, size_t len) |
9b1d1dac PC |
4598 | { |
4599 | char *end; | |
4600 | unsigned long chunk, end_chunk; | |
6791875e | 4601 | int err; |
9b1d1dac | 4602 | |
6791875e N |
4603 | err = mddev_lock(mddev); |
4604 | if (err) | |
4605 | return err; | |
9b1d1dac PC |
4606 | if (!mddev->bitmap) |
4607 | goto out; | |
4608 | /* buf should be <chunk> <chunk> ... or <chunk>-<chunk> ... (range) */ | |
4609 | while (*buf) { | |
4610 | chunk = end_chunk = simple_strtoul(buf, &end, 0); | |
4611 | if (buf == end) break; | |
4612 | if (*end == '-') { /* range */ | |
4613 | buf = end + 1; | |
4614 | end_chunk = simple_strtoul(buf, &end, 0); | |
4615 | if (buf == end) break; | |
4616 | } | |
4617 | if (*end && !isspace(*end)) break; | |
e64e4018 | 4618 | md_bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk); |
e7d2860b | 4619 | buf = skip_spaces(end); |
9b1d1dac | 4620 | } |
e64e4018 | 4621 | md_bitmap_unplug(mddev->bitmap); /* flush the bits to disk */ |
9b1d1dac | 4622 | out: |
6791875e | 4623 | mddev_unlock(mddev); |
9b1d1dac PC |
4624 | return len; |
4625 | } | |
4626 | ||
4627 | static struct md_sysfs_entry md_bitmap = | |
4628 | __ATTR(bitmap_set_bits, S_IWUSR, null_show, bitmap_store); | |
4629 | ||
a35b0d69 | 4630 | static ssize_t |
fd01b88c | 4631 | size_show(struct mddev *mddev, char *page) |
a35b0d69 | 4632 | { |
58c0fed4 AN |
4633 | return sprintf(page, "%llu\n", |
4634 | (unsigned long long)mddev->dev_sectors / 2); | |
a35b0d69 N |
4635 | } |
4636 | ||
fd01b88c | 4637 | static int update_size(struct mddev *mddev, sector_t num_sectors); |
a35b0d69 N |
4638 | |
4639 | static ssize_t | |
fd01b88c | 4640 | size_store(struct mddev *mddev, const char *buf, size_t len) |
a35b0d69 N |
4641 | { |
4642 | /* If array is inactive, we can reduce the component size, but | |
4643 | * not increase it (except from 0). | |
4644 | * If array is active, we can try an on-line resize | |
4645 | */ | |
b522adcd DW |
4646 | sector_t sectors; |
4647 | int err = strict_blocks_to_sectors(buf, §ors); | |
a35b0d69 | 4648 | |
58c0fed4 AN |
4649 | if (err < 0) |
4650 | return err; | |
6791875e N |
4651 | err = mddev_lock(mddev); |
4652 | if (err) | |
4653 | return err; | |
a35b0d69 | 4654 | if (mddev->pers) { |
58c0fed4 | 4655 | err = update_size(mddev, sectors); |
4ba1e788 XN |
4656 | if (err == 0) |
4657 | md_update_sb(mddev, 1); | |
a35b0d69 | 4658 | } else { |
58c0fed4 AN |
4659 | if (mddev->dev_sectors == 0 || |
4660 | mddev->dev_sectors > sectors) | |
4661 | mddev->dev_sectors = sectors; | |
a35b0d69 N |
4662 | else |
4663 | err = -ENOSPC; | |
4664 | } | |
6791875e | 4665 | mddev_unlock(mddev); |
a35b0d69 N |
4666 | return err ? err : len; |
4667 | } | |
4668 | ||
4669 | static struct md_sysfs_entry md_size = | |
80ca3a44 | 4670 | __ATTR(component_size, S_IRUGO|S_IWUSR, size_show, size_store); |
a35b0d69 | 4671 | |
83f0d77a | 4672 | /* Metadata version. |
e691063a N |
4673 | * This is one of |
4674 | * 'none' for arrays with no metadata (good luck...) | |
4675 | * 'external' for arrays with externally managed metadata, | |
8bb93aac N |
4676 | * or N.M for internally known formats |
4677 | */ | |
4678 | static ssize_t | |
fd01b88c | 4679 | metadata_show(struct mddev *mddev, char *page) |
8bb93aac N |
4680 | { |
4681 | if (mddev->persistent) | |
4682 | return sprintf(page, "%d.%d\n", | |
4683 | mddev->major_version, mddev->minor_version); | |
e691063a N |
4684 | else if (mddev->external) |
4685 | return sprintf(page, "external:%s\n", mddev->metadata_type); | |
8bb93aac N |
4686 | else |
4687 | return sprintf(page, "none\n"); | |
4688 | } | |
4689 | ||
4690 | static ssize_t | |
fd01b88c | 4691 | metadata_store(struct mddev *mddev, const char *buf, size_t len) |
8bb93aac N |
4692 | { |
4693 | int major, minor; | |
4694 | char *e; | |
6791875e | 4695 | int err; |
ea43ddd8 N |
4696 | /* Changing the details of 'external' metadata is |
4697 | * always permitted. Otherwise there must be | |
4698 | * no devices attached to the array. | |
4699 | */ | |
6791875e N |
4700 | |
4701 | err = mddev_lock(mddev); | |
4702 | if (err) | |
4703 | return err; | |
4704 | err = -EBUSY; | |
ea43ddd8 N |
4705 | if (mddev->external && strncmp(buf, "external:", 9) == 0) |
4706 | ; | |
4707 | else if (!list_empty(&mddev->disks)) | |
6791875e | 4708 | goto out_unlock; |
8bb93aac | 4709 | |
6791875e | 4710 | err = 0; |
8bb93aac N |
4711 | if (cmd_match(buf, "none")) { |
4712 | mddev->persistent = 0; | |
e691063a N |
4713 | mddev->external = 0; |
4714 | mddev->major_version = 0; | |
4715 | mddev->minor_version = 90; | |
6791875e | 4716 | goto out_unlock; |
e691063a N |
4717 | } |
4718 | if (strncmp(buf, "external:", 9) == 0) { | |
20a49ff6 | 4719 | size_t namelen = len-9; |
e691063a N |
4720 | if (namelen >= sizeof(mddev->metadata_type)) |
4721 | namelen = sizeof(mddev->metadata_type)-1; | |
4722 | strncpy(mddev->metadata_type, buf+9, namelen); | |
4723 | mddev->metadata_type[namelen] = 0; | |
4724 | if (namelen && mddev->metadata_type[namelen-1] == '\n') | |
4725 | mddev->metadata_type[--namelen] = 0; | |
4726 | mddev->persistent = 0; | |
4727 | mddev->external = 1; | |
8bb93aac N |
4728 | mddev->major_version = 0; |
4729 | mddev->minor_version = 90; | |
6791875e | 4730 | goto out_unlock; |
8bb93aac N |
4731 | } |
4732 | major = simple_strtoul(buf, &e, 10); | |
6791875e | 4733 | err = -EINVAL; |
8bb93aac | 4734 | if (e==buf || *e != '.') |
6791875e | 4735 | goto out_unlock; |
8bb93aac N |
4736 | buf = e+1; |
4737 | minor = simple_strtoul(buf, &e, 10); | |
3f9d7b0d | 4738 | if (e==buf || (*e && *e != '\n') ) |
6791875e N |
4739 | goto out_unlock; |
4740 | err = -ENOENT; | |
50511da3 | 4741 | if (major >= ARRAY_SIZE(super_types) || super_types[major].name == NULL) |
6791875e | 4742 | goto out_unlock; |
8bb93aac N |
4743 | mddev->major_version = major; |
4744 | mddev->minor_version = minor; | |
4745 | mddev->persistent = 1; | |
e691063a | 4746 | mddev->external = 0; |
6791875e N |
4747 | err = 0; |
4748 | out_unlock: | |
4749 | mddev_unlock(mddev); | |
4750 | return err ?: len; | |
8bb93aac N |
4751 | } |
4752 | ||
4753 | static struct md_sysfs_entry md_metadata = | |
750f199e | 4754 | __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store); |
8bb93aac | 4755 | |
24dd469d | 4756 | static ssize_t |
fd01b88c | 4757 | action_show(struct mddev *mddev, char *page) |
24dd469d | 4758 | { |
7eec314d | 4759 | char *type = "idle"; |
b7b17c9b N |
4760 | unsigned long recovery = mddev->recovery; |
4761 | if (test_bit(MD_RECOVERY_FROZEN, &recovery)) | |
b6a9ce68 | 4762 | type = "frozen"; |
b7b17c9b N |
4763 | else if (test_bit(MD_RECOVERY_RUNNING, &recovery) || |
4764 | (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &recovery))) { | |
4765 | if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) | |
ccfcc3c1 | 4766 | type = "reshape"; |
b7b17c9b N |
4767 | else if (test_bit(MD_RECOVERY_SYNC, &recovery)) { |
4768 | if (!test_bit(MD_RECOVERY_REQUESTED, &recovery)) | |
24dd469d | 4769 | type = "resync"; |
b7b17c9b | 4770 | else if (test_bit(MD_RECOVERY_CHECK, &recovery)) |
24dd469d N |
4771 | type = "check"; |
4772 | else | |
4773 | type = "repair"; | |
b7b17c9b | 4774 | } else if (test_bit(MD_RECOVERY_RECOVER, &recovery)) |
24dd469d | 4775 | type = "recover"; |
985ca973 N |
4776 | else if (mddev->reshape_position != MaxSector) |
4777 | type = "reshape"; | |
24dd469d N |
4778 | } |
4779 | return sprintf(page, "%s\n", type); | |
4780 | } | |
4781 | ||
4782 | static ssize_t | |
fd01b88c | 4783 | action_store(struct mddev *mddev, const char *page, size_t len) |
24dd469d | 4784 | { |
7eec314d N |
4785 | if (!mddev->pers || !mddev->pers->sync_request) |
4786 | return -EINVAL; | |
4787 | ||
b6a9ce68 N |
4788 | |
4789 | if (cmd_match(page, "idle") || cmd_match(page, "frozen")) { | |
56ccc112 N |
4790 | if (cmd_match(page, "frozen")) |
4791 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4792 | else | |
4793 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
8e8e2518 N |
4794 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
4795 | mddev_lock(mddev) == 0) { | |
cc1ffe61 GJ |
4796 | if (work_pending(&mddev->del_work)) |
4797 | flush_workqueue(md_misc_wq); | |
8e8e2518 N |
4798 | if (mddev->sync_thread) { |
4799 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
6791875e | 4800 | md_reap_sync_thread(mddev); |
6791875e | 4801 | } |
8e8e2518 | 4802 | mddev_unlock(mddev); |
7eec314d | 4803 | } |
312045ee | 4804 | } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
24dd469d | 4805 | return -EBUSY; |
72a23c21 | 4806 | else if (cmd_match(page, "resync")) |
56ccc112 | 4807 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4808 | else if (cmd_match(page, "recover")) { |
56ccc112 | 4809 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4810 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
72a23c21 | 4811 | } else if (cmd_match(page, "reshape")) { |
16484bf5 N |
4812 | int err; |
4813 | if (mddev->pers->start_reshape == NULL) | |
4814 | return -EINVAL; | |
6791875e N |
4815 | err = mddev_lock(mddev); |
4816 | if (!err) { | |
312045ee N |
4817 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4818 | err = -EBUSY; | |
4819 | else { | |
4820 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4821 | err = mddev->pers->start_reshape(mddev); | |
4822 | } | |
6791875e N |
4823 | mddev_unlock(mddev); |
4824 | } | |
16484bf5 N |
4825 | if (err) |
4826 | return err; | |
a99ac971 | 4827 | sysfs_notify(&mddev->kobj, NULL, "degraded"); |
16484bf5 | 4828 | } else { |
bce74dac | 4829 | if (cmd_match(page, "check")) |
7eec314d | 4830 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
2adc7d47 | 4831 | else if (!cmd_match(page, "repair")) |
7eec314d | 4832 | return -EINVAL; |
56ccc112 | 4833 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
7eec314d N |
4834 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
4835 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
7eec314d | 4836 | } |
48c26ddc N |
4837 | if (mddev->ro == 2) { |
4838 | /* A write to sync_action is enough to justify | |
4839 | * canceling read-auto mode | |
4840 | */ | |
4841 | mddev->ro = 0; | |
4842 | md_wakeup_thread(mddev->sync_thread); | |
4843 | } | |
03c902e1 | 4844 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
24dd469d | 4845 | md_wakeup_thread(mddev->thread); |
00bcb4ac | 4846 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
24dd469d N |
4847 | return len; |
4848 | } | |
4849 | ||
c4a39551 | 4850 | static struct md_sysfs_entry md_scan_mode = |
750f199e | 4851 | __ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store); |
c4a39551 JB |
4852 | |
4853 | static ssize_t | |
4854 | last_sync_action_show(struct mddev *mddev, char *page) | |
4855 | { | |
4856 | return sprintf(page, "%s\n", mddev->last_sync_action); | |
4857 | } | |
4858 | ||
4859 | static struct md_sysfs_entry md_last_scan_mode = __ATTR_RO(last_sync_action); | |
4860 | ||
9d88883e | 4861 | static ssize_t |
fd01b88c | 4862 | mismatch_cnt_show(struct mddev *mddev, char *page) |
9d88883e N |
4863 | { |
4864 | return sprintf(page, "%llu\n", | |
7f7583d4 JM |
4865 | (unsigned long long) |
4866 | atomic64_read(&mddev->resync_mismatches)); | |
9d88883e N |
4867 | } |
4868 | ||
80ca3a44 | 4869 | static struct md_sysfs_entry md_mismatches = __ATTR_RO(mismatch_cnt); |
9d88883e | 4870 | |
88202a0c | 4871 | static ssize_t |
fd01b88c | 4872 | sync_min_show(struct mddev *mddev, char *page) |
88202a0c N |
4873 | { |
4874 | return sprintf(page, "%d (%s)\n", speed_min(mddev), | |
4875 | mddev->sync_speed_min ? "local": "system"); | |
4876 | } | |
4877 | ||
4878 | static ssize_t | |
fd01b88c | 4879 | sync_min_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4880 | { |
4c9309c0 AD |
4881 | unsigned int min; |
4882 | int rv; | |
4883 | ||
88202a0c | 4884 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4885 | min = 0; |
4886 | } else { | |
4887 | rv = kstrtouint(buf, 10, &min); | |
4888 | if (rv < 0) | |
4889 | return rv; | |
4890 | if (min == 0) | |
4891 | return -EINVAL; | |
88202a0c | 4892 | } |
88202a0c N |
4893 | mddev->sync_speed_min = min; |
4894 | return len; | |
4895 | } | |
4896 | ||
4897 | static struct md_sysfs_entry md_sync_min = | |
4898 | __ATTR(sync_speed_min, S_IRUGO|S_IWUSR, sync_min_show, sync_min_store); | |
4899 | ||
4900 | static ssize_t | |
fd01b88c | 4901 | sync_max_show(struct mddev *mddev, char *page) |
88202a0c N |
4902 | { |
4903 | return sprintf(page, "%d (%s)\n", speed_max(mddev), | |
4904 | mddev->sync_speed_max ? "local": "system"); | |
4905 | } | |
4906 | ||
4907 | static ssize_t | |
fd01b88c | 4908 | sync_max_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4909 | { |
4c9309c0 AD |
4910 | unsigned int max; |
4911 | int rv; | |
4912 | ||
88202a0c | 4913 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4914 | max = 0; |
4915 | } else { | |
4916 | rv = kstrtouint(buf, 10, &max); | |
4917 | if (rv < 0) | |
4918 | return rv; | |
4919 | if (max == 0) | |
4920 | return -EINVAL; | |
88202a0c | 4921 | } |
88202a0c N |
4922 | mddev->sync_speed_max = max; |
4923 | return len; | |
4924 | } | |
4925 | ||
4926 | static struct md_sysfs_entry md_sync_max = | |
4927 | __ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store); | |
4928 | ||
d7f3d291 | 4929 | static ssize_t |
fd01b88c | 4930 | degraded_show(struct mddev *mddev, char *page) |
d7f3d291 IP |
4931 | { |
4932 | return sprintf(page, "%d\n", mddev->degraded); | |
4933 | } | |
4934 | static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded); | |
88202a0c | 4935 | |
90b08710 | 4936 | static ssize_t |
fd01b88c | 4937 | sync_force_parallel_show(struct mddev *mddev, char *page) |
90b08710 BS |
4938 | { |
4939 | return sprintf(page, "%d\n", mddev->parallel_resync); | |
4940 | } | |
4941 | ||
4942 | static ssize_t | |
fd01b88c | 4943 | sync_force_parallel_store(struct mddev *mddev, const char *buf, size_t len) |
90b08710 BS |
4944 | { |
4945 | long n; | |
4946 | ||
b29bebd6 | 4947 | if (kstrtol(buf, 10, &n)) |
90b08710 BS |
4948 | return -EINVAL; |
4949 | ||
4950 | if (n != 0 && n != 1) | |
4951 | return -EINVAL; | |
4952 | ||
4953 | mddev->parallel_resync = n; | |
4954 | ||
4955 | if (mddev->sync_thread) | |
4956 | wake_up(&resync_wait); | |
4957 | ||
4958 | return len; | |
4959 | } | |
4960 | ||
4961 | /* force parallel resync, even with shared block devices */ | |
4962 | static struct md_sysfs_entry md_sync_force_parallel = | |
4963 | __ATTR(sync_force_parallel, S_IRUGO|S_IWUSR, | |
4964 | sync_force_parallel_show, sync_force_parallel_store); | |
4965 | ||
88202a0c | 4966 | static ssize_t |
fd01b88c | 4967 | sync_speed_show(struct mddev *mddev, char *page) |
88202a0c N |
4968 | { |
4969 | unsigned long resync, dt, db; | |
d1a7c503 N |
4970 | if (mddev->curr_resync == 0) |
4971 | return sprintf(page, "none\n"); | |
9687a60c AN |
4972 | resync = mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active); |
4973 | dt = (jiffies - mddev->resync_mark) / HZ; | |
88202a0c | 4974 | if (!dt) dt++; |
9687a60c AN |
4975 | db = resync - mddev->resync_mark_cnt; |
4976 | return sprintf(page, "%lu\n", db/dt/2); /* K/sec */ | |
88202a0c N |
4977 | } |
4978 | ||
80ca3a44 | 4979 | static struct md_sysfs_entry md_sync_speed = __ATTR_RO(sync_speed); |
88202a0c N |
4980 | |
4981 | static ssize_t | |
fd01b88c | 4982 | sync_completed_show(struct mddev *mddev, char *page) |
88202a0c | 4983 | { |
13ae864b | 4984 | unsigned long long max_sectors, resync; |
88202a0c | 4985 | |
acb180b0 N |
4986 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4987 | return sprintf(page, "none\n"); | |
4988 | ||
72f36d59 N |
4989 | if (mddev->curr_resync == 1 || |
4990 | mddev->curr_resync == 2) | |
4991 | return sprintf(page, "delayed\n"); | |
4992 | ||
c804cdec N |
4993 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
4994 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
58c0fed4 | 4995 | max_sectors = mddev->resync_max_sectors; |
88202a0c | 4996 | else |
58c0fed4 | 4997 | max_sectors = mddev->dev_sectors; |
88202a0c | 4998 | |
acb180b0 | 4999 | resync = mddev->curr_resync_completed; |
13ae864b | 5000 | return sprintf(page, "%llu / %llu\n", resync, max_sectors); |
88202a0c N |
5001 | } |
5002 | ||
750f199e N |
5003 | static struct md_sysfs_entry md_sync_completed = |
5004 | __ATTR_PREALLOC(sync_completed, S_IRUGO, sync_completed_show, NULL); | |
88202a0c | 5005 | |
5e96ee65 | 5006 | static ssize_t |
fd01b88c | 5007 | min_sync_show(struct mddev *mddev, char *page) |
5e96ee65 NB |
5008 | { |
5009 | return sprintf(page, "%llu\n", | |
5010 | (unsigned long long)mddev->resync_min); | |
5011 | } | |
5012 | static ssize_t | |
fd01b88c | 5013 | min_sync_store(struct mddev *mddev, const char *buf, size_t len) |
5e96ee65 NB |
5014 | { |
5015 | unsigned long long min; | |
23da422b | 5016 | int err; |
23da422b | 5017 | |
b29bebd6 | 5018 | if (kstrtoull(buf, 10, &min)) |
5e96ee65 | 5019 | return -EINVAL; |
23da422b N |
5020 | |
5021 | spin_lock(&mddev->lock); | |
5022 | err = -EINVAL; | |
5e96ee65 | 5023 | if (min > mddev->resync_max) |
23da422b N |
5024 | goto out_unlock; |
5025 | ||
5026 | err = -EBUSY; | |
5e96ee65 | 5027 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 5028 | goto out_unlock; |
5e96ee65 | 5029 | |
50c37b13 N |
5030 | /* Round down to multiple of 4K for safety */ |
5031 | mddev->resync_min = round_down(min, 8); | |
23da422b | 5032 | err = 0; |
5e96ee65 | 5033 | |
23da422b N |
5034 | out_unlock: |
5035 | spin_unlock(&mddev->lock); | |
5036 | return err ?: len; | |
5e96ee65 NB |
5037 | } |
5038 | ||
5039 | static struct md_sysfs_entry md_min_sync = | |
5040 | __ATTR(sync_min, S_IRUGO|S_IWUSR, min_sync_show, min_sync_store); | |
5041 | ||
c6207277 | 5042 | static ssize_t |
fd01b88c | 5043 | max_sync_show(struct mddev *mddev, char *page) |
c6207277 N |
5044 | { |
5045 | if (mddev->resync_max == MaxSector) | |
5046 | return sprintf(page, "max\n"); | |
5047 | else | |
5048 | return sprintf(page, "%llu\n", | |
5049 | (unsigned long long)mddev->resync_max); | |
5050 | } | |
5051 | static ssize_t | |
fd01b88c | 5052 | max_sync_store(struct mddev *mddev, const char *buf, size_t len) |
c6207277 | 5053 | { |
23da422b N |
5054 | int err; |
5055 | spin_lock(&mddev->lock); | |
c6207277 N |
5056 | if (strncmp(buf, "max", 3) == 0) |
5057 | mddev->resync_max = MaxSector; | |
5058 | else { | |
5e96ee65 | 5059 | unsigned long long max; |
23da422b N |
5060 | int chunk; |
5061 | ||
5062 | err = -EINVAL; | |
b29bebd6 | 5063 | if (kstrtoull(buf, 10, &max)) |
23da422b | 5064 | goto out_unlock; |
5e96ee65 | 5065 | if (max < mddev->resync_min) |
23da422b N |
5066 | goto out_unlock; |
5067 | ||
5068 | err = -EBUSY; | |
c6207277 | 5069 | if (max < mddev->resync_max && |
4d484a4a | 5070 | mddev->ro == 0 && |
c6207277 | 5071 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 5072 | goto out_unlock; |
c6207277 N |
5073 | |
5074 | /* Must be a multiple of chunk_size */ | |
23da422b N |
5075 | chunk = mddev->chunk_sectors; |
5076 | if (chunk) { | |
2ac06c33 | 5077 | sector_t temp = max; |
23da422b N |
5078 | |
5079 | err = -EINVAL; | |
5080 | if (sector_div(temp, chunk)) | |
5081 | goto out_unlock; | |
c6207277 N |
5082 | } |
5083 | mddev->resync_max = max; | |
5084 | } | |
5085 | wake_up(&mddev->recovery_wait); | |
23da422b N |
5086 | err = 0; |
5087 | out_unlock: | |
5088 | spin_unlock(&mddev->lock); | |
5089 | return err ?: len; | |
c6207277 N |
5090 | } |
5091 | ||
5092 | static struct md_sysfs_entry md_max_sync = | |
5093 | __ATTR(sync_max, S_IRUGO|S_IWUSR, max_sync_show, max_sync_store); | |
5094 | ||
e464eafd | 5095 | static ssize_t |
fd01b88c | 5096 | suspend_lo_show(struct mddev *mddev, char *page) |
e464eafd N |
5097 | { |
5098 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_lo); | |
5099 | } | |
5100 | ||
5101 | static ssize_t | |
fd01b88c | 5102 | suspend_lo_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5103 | { |
b03e0ccb | 5104 | unsigned long long new; |
6791875e | 5105 | int err; |
e464eafd | 5106 | |
4c9309c0 AD |
5107 | err = kstrtoull(buf, 10, &new); |
5108 | if (err < 0) | |
5109 | return err; | |
5110 | if (new != (sector_t)new) | |
e464eafd | 5111 | return -EINVAL; |
23ddff37 | 5112 | |
6791875e N |
5113 | err = mddev_lock(mddev); |
5114 | if (err) | |
5115 | return err; | |
5116 | err = -EINVAL; | |
5117 | if (mddev->pers == NULL || | |
5118 | mddev->pers->quiesce == NULL) | |
5119 | goto unlock; | |
b03e0ccb | 5120 | mddev_suspend(mddev); |
23ddff37 | 5121 | mddev->suspend_lo = new; |
b03e0ccb N |
5122 | mddev_resume(mddev); |
5123 | ||
6791875e N |
5124 | err = 0; |
5125 | unlock: | |
5126 | mddev_unlock(mddev); | |
5127 | return err ?: len; | |
e464eafd N |
5128 | } |
5129 | static struct md_sysfs_entry md_suspend_lo = | |
5130 | __ATTR(suspend_lo, S_IRUGO|S_IWUSR, suspend_lo_show, suspend_lo_store); | |
5131 | ||
e464eafd | 5132 | static ssize_t |
fd01b88c | 5133 | suspend_hi_show(struct mddev *mddev, char *page) |
e464eafd N |
5134 | { |
5135 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_hi); | |
5136 | } | |
5137 | ||
5138 | static ssize_t | |
fd01b88c | 5139 | suspend_hi_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5140 | { |
b03e0ccb | 5141 | unsigned long long new; |
6791875e | 5142 | int err; |
e464eafd | 5143 | |
4c9309c0 AD |
5144 | err = kstrtoull(buf, 10, &new); |
5145 | if (err < 0) | |
5146 | return err; | |
5147 | if (new != (sector_t)new) | |
e464eafd | 5148 | return -EINVAL; |
23ddff37 | 5149 | |
6791875e N |
5150 | err = mddev_lock(mddev); |
5151 | if (err) | |
5152 | return err; | |
5153 | err = -EINVAL; | |
b03e0ccb | 5154 | if (mddev->pers == NULL) |
6791875e | 5155 | goto unlock; |
b03e0ccb N |
5156 | |
5157 | mddev_suspend(mddev); | |
23ddff37 | 5158 | mddev->suspend_hi = new; |
b03e0ccb N |
5159 | mddev_resume(mddev); |
5160 | ||
6791875e N |
5161 | err = 0; |
5162 | unlock: | |
5163 | mddev_unlock(mddev); | |
5164 | return err ?: len; | |
e464eafd N |
5165 | } |
5166 | static struct md_sysfs_entry md_suspend_hi = | |
5167 | __ATTR(suspend_hi, S_IRUGO|S_IWUSR, suspend_hi_show, suspend_hi_store); | |
5168 | ||
08a02ecd | 5169 | static ssize_t |
fd01b88c | 5170 | reshape_position_show(struct mddev *mddev, char *page) |
08a02ecd N |
5171 | { |
5172 | if (mddev->reshape_position != MaxSector) | |
5173 | return sprintf(page, "%llu\n", | |
5174 | (unsigned long long)mddev->reshape_position); | |
5175 | strcpy(page, "none\n"); | |
5176 | return 5; | |
5177 | } | |
5178 | ||
5179 | static ssize_t | |
fd01b88c | 5180 | reshape_position_store(struct mddev *mddev, const char *buf, size_t len) |
08a02ecd | 5181 | { |
c6563a8c | 5182 | struct md_rdev *rdev; |
4c9309c0 | 5183 | unsigned long long new; |
6791875e | 5184 | int err; |
6791875e | 5185 | |
4c9309c0 AD |
5186 | err = kstrtoull(buf, 10, &new); |
5187 | if (err < 0) | |
5188 | return err; | |
5189 | if (new != (sector_t)new) | |
08a02ecd | 5190 | return -EINVAL; |
6791875e N |
5191 | err = mddev_lock(mddev); |
5192 | if (err) | |
5193 | return err; | |
5194 | err = -EBUSY; | |
5195 | if (mddev->pers) | |
5196 | goto unlock; | |
08a02ecd N |
5197 | mddev->reshape_position = new; |
5198 | mddev->delta_disks = 0; | |
2c810cdd | 5199 | mddev->reshape_backwards = 0; |
08a02ecd N |
5200 | mddev->new_level = mddev->level; |
5201 | mddev->new_layout = mddev->layout; | |
664e7c41 | 5202 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
c6563a8c N |
5203 | rdev_for_each(rdev, mddev) |
5204 | rdev->new_data_offset = rdev->data_offset; | |
6791875e N |
5205 | err = 0; |
5206 | unlock: | |
5207 | mddev_unlock(mddev); | |
5208 | return err ?: len; | |
08a02ecd N |
5209 | } |
5210 | ||
5211 | static struct md_sysfs_entry md_reshape_position = | |
5212 | __ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show, | |
5213 | reshape_position_store); | |
5214 | ||
2c810cdd N |
5215 | static ssize_t |
5216 | reshape_direction_show(struct mddev *mddev, char *page) | |
5217 | { | |
5218 | return sprintf(page, "%s\n", | |
5219 | mddev->reshape_backwards ? "backwards" : "forwards"); | |
5220 | } | |
5221 | ||
5222 | static ssize_t | |
5223 | reshape_direction_store(struct mddev *mddev, const char *buf, size_t len) | |
5224 | { | |
5225 | int backwards = 0; | |
6791875e N |
5226 | int err; |
5227 | ||
2c810cdd N |
5228 | if (cmd_match(buf, "forwards")) |
5229 | backwards = 0; | |
5230 | else if (cmd_match(buf, "backwards")) | |
5231 | backwards = 1; | |
5232 | else | |
5233 | return -EINVAL; | |
5234 | if (mddev->reshape_backwards == backwards) | |
5235 | return len; | |
5236 | ||
6791875e N |
5237 | err = mddev_lock(mddev); |
5238 | if (err) | |
5239 | return err; | |
2c810cdd N |
5240 | /* check if we are allowed to change */ |
5241 | if (mddev->delta_disks) | |
6791875e N |
5242 | err = -EBUSY; |
5243 | else if (mddev->persistent && | |
2c810cdd | 5244 | mddev->major_version == 0) |
6791875e N |
5245 | err = -EINVAL; |
5246 | else | |
5247 | mddev->reshape_backwards = backwards; | |
5248 | mddev_unlock(mddev); | |
5249 | return err ?: len; | |
2c810cdd N |
5250 | } |
5251 | ||
5252 | static struct md_sysfs_entry md_reshape_direction = | |
5253 | __ATTR(reshape_direction, S_IRUGO|S_IWUSR, reshape_direction_show, | |
5254 | reshape_direction_store); | |
5255 | ||
b522adcd | 5256 | static ssize_t |
fd01b88c | 5257 | array_size_show(struct mddev *mddev, char *page) |
b522adcd DW |
5258 | { |
5259 | if (mddev->external_size) | |
5260 | return sprintf(page, "%llu\n", | |
5261 | (unsigned long long)mddev->array_sectors/2); | |
5262 | else | |
5263 | return sprintf(page, "default\n"); | |
5264 | } | |
5265 | ||
5266 | static ssize_t | |
fd01b88c | 5267 | array_size_store(struct mddev *mddev, const char *buf, size_t len) |
b522adcd DW |
5268 | { |
5269 | sector_t sectors; | |
6791875e N |
5270 | int err; |
5271 | ||
5272 | err = mddev_lock(mddev); | |
5273 | if (err) | |
5274 | return err; | |
b522adcd | 5275 | |
ab5a98b1 | 5276 | /* cluster raid doesn't support change array_sectors */ |
b670883b ZL |
5277 | if (mddev_is_clustered(mddev)) { |
5278 | mddev_unlock(mddev); | |
ab5a98b1 | 5279 | return -EINVAL; |
b670883b | 5280 | } |
ab5a98b1 | 5281 | |
b522adcd DW |
5282 | if (strncmp(buf, "default", 7) == 0) { |
5283 | if (mddev->pers) | |
5284 | sectors = mddev->pers->size(mddev, 0, 0); | |
5285 | else | |
5286 | sectors = mddev->array_sectors; | |
5287 | ||
5288 | mddev->external_size = 0; | |
5289 | } else { | |
5290 | if (strict_blocks_to_sectors(buf, §ors) < 0) | |
6791875e N |
5291 | err = -EINVAL; |
5292 | else if (mddev->pers && mddev->pers->size(mddev, 0, 0) < sectors) | |
5293 | err = -E2BIG; | |
5294 | else | |
5295 | mddev->external_size = 1; | |
b522adcd DW |
5296 | } |
5297 | ||
6791875e N |
5298 | if (!err) { |
5299 | mddev->array_sectors = sectors; | |
5300 | if (mddev->pers) { | |
5301 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
5302 | revalidate_disk(mddev->gendisk); | |
5303 | } | |
cbe6ef1d | 5304 | } |
6791875e N |
5305 | mddev_unlock(mddev); |
5306 | return err ?: len; | |
b522adcd DW |
5307 | } |
5308 | ||
5309 | static struct md_sysfs_entry md_array_size = | |
5310 | __ATTR(array_size, S_IRUGO|S_IWUSR, array_size_show, | |
5311 | array_size_store); | |
e464eafd | 5312 | |
664aed04 AP |
5313 | static ssize_t |
5314 | consistency_policy_show(struct mddev *mddev, char *page) | |
5315 | { | |
5316 | int ret; | |
5317 | ||
5318 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) { | |
5319 | ret = sprintf(page, "journal\n"); | |
5320 | } else if (test_bit(MD_HAS_PPL, &mddev->flags)) { | |
5321 | ret = sprintf(page, "ppl\n"); | |
5322 | } else if (mddev->bitmap) { | |
5323 | ret = sprintf(page, "bitmap\n"); | |
5324 | } else if (mddev->pers) { | |
5325 | if (mddev->pers->sync_request) | |
5326 | ret = sprintf(page, "resync\n"); | |
5327 | else | |
5328 | ret = sprintf(page, "none\n"); | |
5329 | } else { | |
5330 | ret = sprintf(page, "unknown\n"); | |
5331 | } | |
5332 | ||
5333 | return ret; | |
5334 | } | |
5335 | ||
5336 | static ssize_t | |
5337 | consistency_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5338 | { | |
ba903a3e AP |
5339 | int err = 0; |
5340 | ||
664aed04 | 5341 | if (mddev->pers) { |
ba903a3e AP |
5342 | if (mddev->pers->change_consistency_policy) |
5343 | err = mddev->pers->change_consistency_policy(mddev, buf); | |
5344 | else | |
5345 | err = -EBUSY; | |
664aed04 AP |
5346 | } else if (mddev->external && strncmp(buf, "ppl", 3) == 0) { |
5347 | set_bit(MD_HAS_PPL, &mddev->flags); | |
664aed04 | 5348 | } else { |
ba903a3e | 5349 | err = -EINVAL; |
664aed04 | 5350 | } |
ba903a3e AP |
5351 | |
5352 | return err ? err : len; | |
664aed04 AP |
5353 | } |
5354 | ||
5355 | static struct md_sysfs_entry md_consistency_policy = | |
5356 | __ATTR(consistency_policy, S_IRUGO | S_IWUSR, consistency_policy_show, | |
5357 | consistency_policy_store); | |
5358 | ||
9a567843 GJ |
5359 | static ssize_t fail_last_dev_show(struct mddev *mddev, char *page) |
5360 | { | |
5361 | return sprintf(page, "%d\n", mddev->fail_last_dev); | |
5362 | } | |
5363 | ||
5364 | /* | |
5365 | * Setting fail_last_dev to true to allow last device to be forcibly removed | |
5366 | * from RAID1/RAID10. | |
5367 | */ | |
5368 | static ssize_t | |
5369 | fail_last_dev_store(struct mddev *mddev, const char *buf, size_t len) | |
5370 | { | |
5371 | int ret; | |
5372 | bool value; | |
5373 | ||
5374 | ret = kstrtobool(buf, &value); | |
5375 | if (ret) | |
5376 | return ret; | |
5377 | ||
5378 | if (value != mddev->fail_last_dev) | |
5379 | mddev->fail_last_dev = value; | |
5380 | ||
5381 | return len; | |
5382 | } | |
5383 | static struct md_sysfs_entry md_fail_last_dev = | |
5384 | __ATTR(fail_last_dev, S_IRUGO | S_IWUSR, fail_last_dev_show, | |
5385 | fail_last_dev_store); | |
5386 | ||
3938f5fb GJ |
5387 | static ssize_t serialize_policy_show(struct mddev *mddev, char *page) |
5388 | { | |
5389 | if (mddev->pers == NULL || (mddev->pers->level != 1)) | |
5390 | return sprintf(page, "n/a\n"); | |
5391 | else | |
5392 | return sprintf(page, "%d\n", mddev->serialize_policy); | |
5393 | } | |
5394 | ||
5395 | /* | |
5396 | * Setting serialize_policy to true to enforce write IO is not reordered | |
5397 | * for raid1. | |
5398 | */ | |
5399 | static ssize_t | |
5400 | serialize_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5401 | { | |
5402 | int err; | |
5403 | bool value; | |
5404 | ||
5405 | err = kstrtobool(buf, &value); | |
5406 | if (err) | |
5407 | return err; | |
5408 | ||
5409 | if (value == mddev->serialize_policy) | |
5410 | return len; | |
5411 | ||
5412 | err = mddev_lock(mddev); | |
5413 | if (err) | |
5414 | return err; | |
5415 | if (mddev->pers == NULL || (mddev->pers->level != 1)) { | |
5416 | pr_err("md: serialize_policy is only effective for raid1\n"); | |
5417 | err = -EINVAL; | |
5418 | goto unlock; | |
5419 | } | |
5420 | ||
5421 | mddev_suspend(mddev); | |
5422 | if (value) | |
5423 | mddev_create_serial_pool(mddev, NULL, true); | |
5424 | else | |
5425 | mddev_destroy_serial_pool(mddev, NULL, true); | |
5426 | mddev->serialize_policy = value; | |
5427 | mddev_resume(mddev); | |
5428 | unlock: | |
5429 | mddev_unlock(mddev); | |
5430 | return err ?: len; | |
5431 | } | |
5432 | ||
5433 | static struct md_sysfs_entry md_serialize_policy = | |
5434 | __ATTR(serialize_policy, S_IRUGO | S_IWUSR, serialize_policy_show, | |
5435 | serialize_policy_store); | |
5436 | ||
5437 | ||
eae1701f N |
5438 | static struct attribute *md_default_attrs[] = { |
5439 | &md_level.attr, | |
d4dbd025 | 5440 | &md_layout.attr, |
eae1701f | 5441 | &md_raid_disks.attr, |
3b34380a | 5442 | &md_chunk_size.attr, |
a35b0d69 | 5443 | &md_size.attr, |
a94213b1 | 5444 | &md_resync_start.attr, |
8bb93aac | 5445 | &md_metadata.attr, |
6d7ff738 | 5446 | &md_new_device.attr, |
16f17b39 | 5447 | &md_safe_delay.attr, |
9e653b63 | 5448 | &md_array_state.attr, |
08a02ecd | 5449 | &md_reshape_position.attr, |
2c810cdd | 5450 | &md_reshape_direction.attr, |
b522adcd | 5451 | &md_array_size.attr, |
1e50915f | 5452 | &max_corr_read_errors.attr, |
664aed04 | 5453 | &md_consistency_policy.attr, |
9a567843 | 5454 | &md_fail_last_dev.attr, |
3938f5fb | 5455 | &md_serialize_policy.attr, |
411036fa N |
5456 | NULL, |
5457 | }; | |
5458 | ||
5459 | static struct attribute *md_redundancy_attrs[] = { | |
24dd469d | 5460 | &md_scan_mode.attr, |
c4a39551 | 5461 | &md_last_scan_mode.attr, |
9d88883e | 5462 | &md_mismatches.attr, |
88202a0c N |
5463 | &md_sync_min.attr, |
5464 | &md_sync_max.attr, | |
5465 | &md_sync_speed.attr, | |
90b08710 | 5466 | &md_sync_force_parallel.attr, |
88202a0c | 5467 | &md_sync_completed.attr, |
5e96ee65 | 5468 | &md_min_sync.attr, |
c6207277 | 5469 | &md_max_sync.attr, |
e464eafd N |
5470 | &md_suspend_lo.attr, |
5471 | &md_suspend_hi.attr, | |
9b1d1dac | 5472 | &md_bitmap.attr, |
d7f3d291 | 5473 | &md_degraded.attr, |
eae1701f N |
5474 | NULL, |
5475 | }; | |
411036fa N |
5476 | static struct attribute_group md_redundancy_group = { |
5477 | .name = NULL, | |
5478 | .attrs = md_redundancy_attrs, | |
5479 | }; | |
5480 | ||
eae1701f N |
5481 | static ssize_t |
5482 | md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
5483 | { | |
5484 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5485 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5486 | ssize_t rv; |
eae1701f N |
5487 | |
5488 | if (!entry->show) | |
5489 | return -EIO; | |
af8a2434 N |
5490 | spin_lock(&all_mddevs_lock); |
5491 | if (list_empty(&mddev->all_mddevs)) { | |
5492 | spin_unlock(&all_mddevs_lock); | |
5493 | return -EBUSY; | |
5494 | } | |
5495 | mddev_get(mddev); | |
5496 | spin_unlock(&all_mddevs_lock); | |
5497 | ||
b7b17c9b | 5498 | rv = entry->show(mddev, page); |
af8a2434 | 5499 | mddev_put(mddev); |
96de1e66 | 5500 | return rv; |
eae1701f N |
5501 | } |
5502 | ||
5503 | static ssize_t | |
5504 | md_attr_store(struct kobject *kobj, struct attribute *attr, | |
5505 | const char *page, size_t length) | |
5506 | { | |
5507 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5508 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5509 | ssize_t rv; |
eae1701f N |
5510 | |
5511 | if (!entry->store) | |
5512 | return -EIO; | |
67463acb N |
5513 | if (!capable(CAP_SYS_ADMIN)) |
5514 | return -EACCES; | |
af8a2434 N |
5515 | spin_lock(&all_mddevs_lock); |
5516 | if (list_empty(&mddev->all_mddevs)) { | |
5517 | spin_unlock(&all_mddevs_lock); | |
5518 | return -EBUSY; | |
5519 | } | |
5520 | mddev_get(mddev); | |
5521 | spin_unlock(&all_mddevs_lock); | |
6791875e | 5522 | rv = entry->store(mddev, page, length); |
af8a2434 | 5523 | mddev_put(mddev); |
96de1e66 | 5524 | return rv; |
eae1701f N |
5525 | } |
5526 | ||
5527 | static void md_free(struct kobject *ko) | |
5528 | { | |
fd01b88c | 5529 | struct mddev *mddev = container_of(ko, struct mddev, kobj); |
a21d1504 N |
5530 | |
5531 | if (mddev->sysfs_state) | |
5532 | sysfs_put(mddev->sysfs_state); | |
5533 | ||
d8115c35 BVA |
5534 | if (mddev->gendisk) |
5535 | del_gendisk(mddev->gendisk); | |
6cd18e71 N |
5536 | if (mddev->queue) |
5537 | blk_cleanup_queue(mddev->queue); | |
d8115c35 | 5538 | if (mddev->gendisk) |
a21d1504 | 5539 | put_disk(mddev->gendisk); |
4ad23a97 | 5540 | percpu_ref_exit(&mddev->writes_pending); |
a21d1504 | 5541 | |
28dec870 KO |
5542 | bioset_exit(&mddev->bio_set); |
5543 | bioset_exit(&mddev->sync_set); | |
eae1701f N |
5544 | kfree(mddev); |
5545 | } | |
5546 | ||
52cf25d0 | 5547 | static const struct sysfs_ops md_sysfs_ops = { |
eae1701f N |
5548 | .show = md_attr_show, |
5549 | .store = md_attr_store, | |
5550 | }; | |
5551 | static struct kobj_type md_ktype = { | |
5552 | .release = md_free, | |
5553 | .sysfs_ops = &md_sysfs_ops, | |
5554 | .default_attrs = md_default_attrs, | |
5555 | }; | |
5556 | ||
1da177e4 LT |
5557 | int mdp_major = 0; |
5558 | ||
5fd3a17e DW |
5559 | static void mddev_delayed_delete(struct work_struct *ws) |
5560 | { | |
fd01b88c | 5561 | struct mddev *mddev = container_of(ws, struct mddev, del_work); |
5fd3a17e | 5562 | |
43a70507 | 5563 | sysfs_remove_group(&mddev->kobj, &md_bitmap_group); |
5fd3a17e DW |
5564 | kobject_del(&mddev->kobj); |
5565 | kobject_put(&mddev->kobj); | |
5566 | } | |
5567 | ||
4ad23a97 N |
5568 | static void no_op(struct percpu_ref *r) {} |
5569 | ||
a415c0f1 N |
5570 | int mddev_init_writes_pending(struct mddev *mddev) |
5571 | { | |
5572 | if (mddev->writes_pending.percpu_count_ptr) | |
5573 | return 0; | |
ddde2af7 RG |
5574 | if (percpu_ref_init(&mddev->writes_pending, no_op, |
5575 | PERCPU_REF_ALLOW_REINIT, GFP_KERNEL) < 0) | |
a415c0f1 N |
5576 | return -ENOMEM; |
5577 | /* We want to start with the refcount at zero */ | |
5578 | percpu_ref_put(&mddev->writes_pending); | |
5579 | return 0; | |
5580 | } | |
5581 | EXPORT_SYMBOL_GPL(mddev_init_writes_pending); | |
5582 | ||
efeb53c0 | 5583 | static int md_alloc(dev_t dev, char *name) |
1da177e4 | 5584 | { |
039b7225 N |
5585 | /* |
5586 | * If dev is zero, name is the name of a device to allocate with | |
5587 | * an arbitrary minor number. It will be "md_???" | |
5588 | * If dev is non-zero it must be a device number with a MAJOR of | |
5589 | * MD_MAJOR or mdp_major. In this case, if "name" is NULL, then | |
5590 | * the device is being created by opening a node in /dev. | |
5591 | * If "name" is not NULL, the device is being created by | |
5592 | * writing to /sys/module/md_mod/parameters/new_array. | |
5593 | */ | |
48c9c27b | 5594 | static DEFINE_MUTEX(disks_mutex); |
fd01b88c | 5595 | struct mddev *mddev = mddev_find(dev); |
1da177e4 | 5596 | struct gendisk *disk; |
efeb53c0 N |
5597 | int partitioned; |
5598 | int shift; | |
5599 | int unit; | |
3830c62f | 5600 | int error; |
1da177e4 LT |
5601 | |
5602 | if (!mddev) | |
efeb53c0 N |
5603 | return -ENODEV; |
5604 | ||
5605 | partitioned = (MAJOR(mddev->unit) != MD_MAJOR); | |
5606 | shift = partitioned ? MdpMinorShift : 0; | |
5607 | unit = MINOR(mddev->unit) >> shift; | |
1da177e4 | 5608 | |
e804ac78 TH |
5609 | /* wait for any previous instance of this device to be |
5610 | * completely removed (mddev_delayed_delete). | |
d3374825 | 5611 | */ |
e804ac78 | 5612 | flush_workqueue(md_misc_wq); |
d3374825 | 5613 | |
48c9c27b | 5614 | mutex_lock(&disks_mutex); |
0909dc44 N |
5615 | error = -EEXIST; |
5616 | if (mddev->gendisk) | |
5617 | goto abort; | |
efeb53c0 | 5618 | |
039b7225 | 5619 | if (name && !dev) { |
efeb53c0 N |
5620 | /* Need to ensure that 'name' is not a duplicate. |
5621 | */ | |
fd01b88c | 5622 | struct mddev *mddev2; |
efeb53c0 N |
5623 | spin_lock(&all_mddevs_lock); |
5624 | ||
5625 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) | |
5626 | if (mddev2->gendisk && | |
5627 | strcmp(mddev2->gendisk->disk_name, name) == 0) { | |
5628 | spin_unlock(&all_mddevs_lock); | |
0909dc44 | 5629 | goto abort; |
efeb53c0 N |
5630 | } |
5631 | spin_unlock(&all_mddevs_lock); | |
1da177e4 | 5632 | } |
039b7225 N |
5633 | if (name && dev) |
5634 | /* | |
5635 | * Creating /dev/mdNNN via "newarray", so adjust hold_active. | |
5636 | */ | |
5637 | mddev->hold_active = UNTIL_STOP; | |
8b765398 | 5638 | |
0909dc44 | 5639 | error = -ENOMEM; |
3d745ea5 | 5640 | mddev->queue = blk_alloc_queue(md_make_request, NUMA_NO_NODE); |
0909dc44 N |
5641 | if (!mddev->queue) |
5642 | goto abort; | |
409c57f3 | 5643 | |
b1bd055d | 5644 | blk_set_stacking_limits(&mddev->queue->limits); |
8b765398 | 5645 | |
1da177e4 LT |
5646 | disk = alloc_disk(1 << shift); |
5647 | if (!disk) { | |
8b765398 N |
5648 | blk_cleanup_queue(mddev->queue); |
5649 | mddev->queue = NULL; | |
0909dc44 | 5650 | goto abort; |
1da177e4 | 5651 | } |
efeb53c0 | 5652 | disk->major = MAJOR(mddev->unit); |
1da177e4 | 5653 | disk->first_minor = unit << shift; |
efeb53c0 N |
5654 | if (name) |
5655 | strcpy(disk->disk_name, name); | |
5656 | else if (partitioned) | |
1da177e4 | 5657 | sprintf(disk->disk_name, "md_d%d", unit); |
ce7b0f46 | 5658 | else |
1da177e4 | 5659 | sprintf(disk->disk_name, "md%d", unit); |
1da177e4 LT |
5660 | disk->fops = &md_fops; |
5661 | disk->private_data = mddev; | |
5662 | disk->queue = mddev->queue; | |
56883a7e | 5663 | blk_queue_write_cache(mddev->queue, true, true); |
92850bbd | 5664 | /* Allow extended partitions. This makes the |
d3374825 | 5665 | * 'mdp' device redundant, but we can't really |
92850bbd N |
5666 | * remove it now. |
5667 | */ | |
5668 | disk->flags |= GENHD_FL_EXT_DEVT; | |
1da177e4 | 5669 | mddev->gendisk = disk; |
b0140891 N |
5670 | /* As soon as we call add_disk(), another thread could get |
5671 | * through to md_open, so make sure it doesn't get too far | |
5672 | */ | |
5673 | mutex_lock(&mddev->open_mutex); | |
5674 | add_disk(disk); | |
5675 | ||
28dec870 | 5676 | error = kobject_add(&mddev->kobj, &disk_to_dev(disk)->kobj, "%s", "md"); |
0909dc44 N |
5677 | if (error) { |
5678 | /* This isn't possible, but as kobject_init_and_add is marked | |
5679 | * __must_check, we must do something with the result | |
5680 | */ | |
9d48739e N |
5681 | pr_debug("md: cannot register %s/md - name in use\n", |
5682 | disk->disk_name); | |
0909dc44 N |
5683 | error = 0; |
5684 | } | |
00bcb4ac N |
5685 | if (mddev->kobj.sd && |
5686 | sysfs_create_group(&mddev->kobj, &md_bitmap_group)) | |
9d48739e | 5687 | pr_debug("pointless warning\n"); |
b0140891 | 5688 | mutex_unlock(&mddev->open_mutex); |
0909dc44 N |
5689 | abort: |
5690 | mutex_unlock(&disks_mutex); | |
00bcb4ac | 5691 | if (!error && mddev->kobj.sd) { |
3830c62f | 5692 | kobject_uevent(&mddev->kobj, KOBJ_ADD); |
00bcb4ac | 5693 | mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state"); |
b62b7590 | 5694 | } |
d3374825 | 5695 | mddev_put(mddev); |
0909dc44 | 5696 | return error; |
efeb53c0 N |
5697 | } |
5698 | ||
5699 | static struct kobject *md_probe(dev_t dev, int *part, void *data) | |
5700 | { | |
78b6350d N |
5701 | if (create_on_open) |
5702 | md_alloc(dev, NULL); | |
1da177e4 LT |
5703 | return NULL; |
5704 | } | |
5705 | ||
e4dca7b7 | 5706 | static int add_named_array(const char *val, const struct kernel_param *kp) |
efeb53c0 | 5707 | { |
039b7225 N |
5708 | /* |
5709 | * val must be "md_*" or "mdNNN". | |
5710 | * For "md_*" we allocate an array with a large free minor number, and | |
efeb53c0 | 5711 | * set the name to val. val must not already be an active name. |
039b7225 N |
5712 | * For "mdNNN" we allocate an array with the minor number NNN |
5713 | * which must not already be in use. | |
efeb53c0 N |
5714 | */ |
5715 | int len = strlen(val); | |
5716 | char buf[DISK_NAME_LEN]; | |
039b7225 | 5717 | unsigned long devnum; |
efeb53c0 N |
5718 | |
5719 | while (len && val[len-1] == '\n') | |
5720 | len--; | |
5721 | if (len >= DISK_NAME_LEN) | |
5722 | return -E2BIG; | |
5723 | strlcpy(buf, val, len+1); | |
039b7225 N |
5724 | if (strncmp(buf, "md_", 3) == 0) |
5725 | return md_alloc(0, buf); | |
5726 | if (strncmp(buf, "md", 2) == 0 && | |
5727 | isdigit(buf[2]) && | |
5728 | kstrtoul(buf+2, 10, &devnum) == 0 && | |
5729 | devnum <= MINORMASK) | |
5730 | return md_alloc(MKDEV(MD_MAJOR, devnum), NULL); | |
5731 | ||
5732 | return -EINVAL; | |
efeb53c0 N |
5733 | } |
5734 | ||
8376d3c1 | 5735 | static void md_safemode_timeout(struct timer_list *t) |
1da177e4 | 5736 | { |
8376d3c1 | 5737 | struct mddev *mddev = from_timer(mddev, t, safemode_timer); |
1da177e4 | 5738 | |
4ad23a97 N |
5739 | mddev->safemode = 1; |
5740 | if (mddev->external) | |
5741 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
5742 | ||
1da177e4 LT |
5743 | md_wakeup_thread(mddev->thread); |
5744 | } | |
5745 | ||
6ff8d8ec | 5746 | static int start_dirty_degraded; |
1da177e4 | 5747 | |
fd01b88c | 5748 | int md_run(struct mddev *mddev) |
1da177e4 | 5749 | { |
2604b703 | 5750 | int err; |
3cb03002 | 5751 | struct md_rdev *rdev; |
84fc4b56 | 5752 | struct md_personality *pers; |
1da177e4 | 5753 | |
a757e64c N |
5754 | if (list_empty(&mddev->disks)) |
5755 | /* cannot run an array with no devices.. */ | |
1da177e4 | 5756 | return -EINVAL; |
1da177e4 LT |
5757 | |
5758 | if (mddev->pers) | |
5759 | return -EBUSY; | |
bb4f1e9d N |
5760 | /* Cannot run until previous stop completes properly */ |
5761 | if (mddev->sysfs_active) | |
5762 | return -EBUSY; | |
b6eb127d | 5763 | |
1da177e4 LT |
5764 | /* |
5765 | * Analyze all RAID superblock(s) | |
5766 | */ | |
1ec4a939 N |
5767 | if (!mddev->raid_disks) { |
5768 | if (!mddev->persistent) | |
5769 | return -EINVAL; | |
6a5cb53a YY |
5770 | err = analyze_sbs(mddev); |
5771 | if (err) | |
5772 | return -EINVAL; | |
1ec4a939 | 5773 | } |
1da177e4 | 5774 | |
d9d166c2 N |
5775 | if (mddev->level != LEVEL_NONE) |
5776 | request_module("md-level-%d", mddev->level); | |
5777 | else if (mddev->clevel[0]) | |
5778 | request_module("md-%s", mddev->clevel); | |
1da177e4 LT |
5779 | |
5780 | /* | |
5781 | * Drop all container device buffers, from now on | |
5782 | * the only valid external interface is through the md | |
5783 | * device. | |
1da177e4 | 5784 | */ |
4b6c1060 | 5785 | mddev->has_superblocks = false; |
dafb20fa | 5786 | rdev_for_each(rdev, mddev) { |
b2d444d7 | 5787 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
5788 | continue; |
5789 | sync_blockdev(rdev->bdev); | |
f98393a6 | 5790 | invalidate_bdev(rdev->bdev); |
97b20ef7 N |
5791 | if (mddev->ro != 1 && |
5792 | (bdev_read_only(rdev->bdev) || | |
5793 | bdev_read_only(rdev->meta_bdev))) { | |
5794 | mddev->ro = 1; | |
5795 | if (mddev->gendisk) | |
5796 | set_disk_ro(mddev->gendisk, 1); | |
5797 | } | |
f0d76d70 | 5798 | |
4b6c1060 HM |
5799 | if (rdev->sb_page) |
5800 | mddev->has_superblocks = true; | |
5801 | ||
f0d76d70 N |
5802 | /* perform some consistency tests on the device. |
5803 | * We don't want the data to overlap the metadata, | |
58c0fed4 | 5804 | * Internal Bitmap issues have been handled elsewhere. |
f0d76d70 | 5805 | */ |
a6ff7e08 JB |
5806 | if (rdev->meta_bdev) { |
5807 | /* Nothing to check */; | |
5808 | } else if (rdev->data_offset < rdev->sb_start) { | |
58c0fed4 AN |
5809 | if (mddev->dev_sectors && |
5810 | rdev->data_offset + mddev->dev_sectors | |
0f420358 | 5811 | > rdev->sb_start) { |
9d48739e N |
5812 | pr_warn("md: %s: data overlaps metadata\n", |
5813 | mdname(mddev)); | |
f0d76d70 N |
5814 | return -EINVAL; |
5815 | } | |
5816 | } else { | |
0f420358 | 5817 | if (rdev->sb_start + rdev->sb_size/512 |
f0d76d70 | 5818 | > rdev->data_offset) { |
9d48739e N |
5819 | pr_warn("md: %s: metadata overlaps data\n", |
5820 | mdname(mddev)); | |
f0d76d70 N |
5821 | return -EINVAL; |
5822 | } | |
5823 | } | |
00bcb4ac | 5824 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
5825 | } |
5826 | ||
afeee514 KO |
5827 | if (!bioset_initialized(&mddev->bio_set)) { |
5828 | err = bioset_init(&mddev->bio_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5829 | if (err) | |
5830 | return err; | |
10273170 | 5831 | } |
afeee514 KO |
5832 | if (!bioset_initialized(&mddev->sync_set)) { |
5833 | err = bioset_init(&mddev->sync_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5834 | if (err) | |
28dec870 | 5835 | return err; |
5a85071c | 5836 | } |
a167f663 | 5837 | |
1da177e4 | 5838 | spin_lock(&pers_lock); |
d9d166c2 | 5839 | pers = find_pers(mddev->level, mddev->clevel); |
2604b703 | 5840 | if (!pers || !try_module_get(pers->owner)) { |
1da177e4 | 5841 | spin_unlock(&pers_lock); |
d9d166c2 | 5842 | if (mddev->level != LEVEL_NONE) |
9d48739e N |
5843 | pr_warn("md: personality for level %d is not loaded!\n", |
5844 | mddev->level); | |
d9d166c2 | 5845 | else |
9d48739e N |
5846 | pr_warn("md: personality for level %s is not loaded!\n", |
5847 | mddev->clevel); | |
bfc9dfdc SL |
5848 | err = -EINVAL; |
5849 | goto abort; | |
1da177e4 | 5850 | } |
1da177e4 | 5851 | spin_unlock(&pers_lock); |
34817e8c N |
5852 | if (mddev->level != pers->level) { |
5853 | mddev->level = pers->level; | |
5854 | mddev->new_level = pers->level; | |
5855 | } | |
d9d166c2 | 5856 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
1da177e4 | 5857 | |
f6705578 | 5858 | if (mddev->reshape_position != MaxSector && |
63c70c4f | 5859 | pers->start_reshape == NULL) { |
f6705578 | 5860 | /* This personality cannot handle reshaping... */ |
f6705578 | 5861 | module_put(pers->owner); |
bfc9dfdc SL |
5862 | err = -EINVAL; |
5863 | goto abort; | |
f6705578 N |
5864 | } |
5865 | ||
7dd5e7c3 N |
5866 | if (pers->sync_request) { |
5867 | /* Warn if this is a potentially silly | |
5868 | * configuration. | |
5869 | */ | |
5870 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 5871 | struct md_rdev *rdev2; |
7dd5e7c3 | 5872 | int warned = 0; |
159ec1fc | 5873 | |
dafb20fa N |
5874 | rdev_for_each(rdev, mddev) |
5875 | rdev_for_each(rdev2, mddev) { | |
7dd5e7c3 N |
5876 | if (rdev < rdev2 && |
5877 | rdev->bdev->bd_contains == | |
5878 | rdev2->bdev->bd_contains) { | |
9d48739e N |
5879 | pr_warn("%s: WARNING: %s appears to be on the same physical disk as %s.\n", |
5880 | mdname(mddev), | |
5881 | bdevname(rdev->bdev,b), | |
5882 | bdevname(rdev2->bdev,b2)); | |
7dd5e7c3 N |
5883 | warned = 1; |
5884 | } | |
5885 | } | |
159ec1fc | 5886 | |
7dd5e7c3 | 5887 | if (warned) |
9d48739e | 5888 | pr_warn("True protection against single-disk failure might be compromised.\n"); |
7dd5e7c3 N |
5889 | } |
5890 | ||
657390d2 | 5891 | mddev->recovery = 0; |
58c0fed4 AN |
5892 | /* may be over-ridden by personality */ |
5893 | mddev->resync_max_sectors = mddev->dev_sectors; | |
5894 | ||
6ff8d8ec | 5895 | mddev->ok_start_degraded = start_dirty_degraded; |
1da177e4 | 5896 | |
0f9552b5 | 5897 | if (start_readonly && mddev->ro == 0) |
f91de92e N |
5898 | mddev->ro = 2; /* read-only, but switch on first write */ |
5899 | ||
36d091f4 | 5900 | err = pers->run(mddev); |
13e53df3 | 5901 | if (err) |
9d48739e | 5902 | pr_warn("md: pers->run() failed ...\n"); |
36d091f4 | 5903 | else if (pers->size(mddev, 0, 0) < mddev->array_sectors) { |
9d48739e N |
5904 | WARN_ONCE(!mddev->external_size, |
5905 | "%s: default size too small, but 'external_size' not in effect?\n", | |
5906 | __func__); | |
5907 | pr_warn("md: invalid array_size %llu > default size %llu\n", | |
5908 | (unsigned long long)mddev->array_sectors / 2, | |
5909 | (unsigned long long)pers->size(mddev, 0, 0) / 2); | |
b522adcd | 5910 | err = -EINVAL; |
b522adcd | 5911 | } |
36d091f4 | 5912 | if (err == 0 && pers->sync_request && |
ef99bf48 | 5913 | (mddev->bitmap_info.file || mddev->bitmap_info.offset)) { |
f9209a32 GR |
5914 | struct bitmap *bitmap; |
5915 | ||
e64e4018 | 5916 | bitmap = md_bitmap_create(mddev, -1); |
f9209a32 GR |
5917 | if (IS_ERR(bitmap)) { |
5918 | err = PTR_ERR(bitmap); | |
9d48739e N |
5919 | pr_warn("%s: failed to create bitmap (%d)\n", |
5920 | mdname(mddev), err); | |
f9209a32 GR |
5921 | } else |
5922 | mddev->bitmap = bitmap; | |
5923 | ||
b15c2e57 | 5924 | } |
d494549a GJ |
5925 | if (err) |
5926 | goto bitmap_abort; | |
3e148a32 GJ |
5927 | |
5928 | if (mddev->bitmap_info.max_write_behind > 0) { | |
3e173ab5 | 5929 | bool create_pool = false; |
3e148a32 GJ |
5930 | |
5931 | rdev_for_each(rdev, mddev) { | |
5932 | if (test_bit(WriteMostly, &rdev->flags) && | |
404659cf | 5933 | rdev_init_serial(rdev)) |
3e173ab5 | 5934 | create_pool = true; |
3e148a32 | 5935 | } |
3e173ab5 | 5936 | if (create_pool && mddev->serial_info_pool == NULL) { |
404659cf GJ |
5937 | mddev->serial_info_pool = |
5938 | mempool_create_kmalloc_pool(NR_SERIAL_INFOS, | |
5939 | sizeof(struct serial_info)); | |
5940 | if (!mddev->serial_info_pool) { | |
3e148a32 | 5941 | err = -ENOMEM; |
d494549a | 5942 | goto bitmap_abort; |
3e148a32 GJ |
5943 | } |
5944 | } | |
5945 | } | |
5946 | ||
5c675f83 | 5947 | if (mddev->queue) { |
bb086a89 SL |
5948 | bool nonrot = true; |
5949 | ||
5950 | rdev_for_each(rdev, mddev) { | |
5951 | if (rdev->raid_disk >= 0 && | |
5952 | !blk_queue_nonrot(bdev_get_queue(rdev->bdev))) { | |
5953 | nonrot = false; | |
5954 | break; | |
5955 | } | |
5956 | } | |
5957 | if (mddev->degraded) | |
5958 | nonrot = false; | |
5959 | if (nonrot) | |
8b904b5b | 5960 | blk_queue_flag_set(QUEUE_FLAG_NONROT, mddev->queue); |
bb086a89 | 5961 | else |
8b904b5b | 5962 | blk_queue_flag_clear(QUEUE_FLAG_NONROT, mddev->queue); |
dc3b17cc JK |
5963 | mddev->queue->backing_dev_info->congested_data = mddev; |
5964 | mddev->queue->backing_dev_info->congested_fn = md_congested; | |
5c675f83 | 5965 | } |
36d091f4 | 5966 | if (pers->sync_request) { |
00bcb4ac N |
5967 | if (mddev->kobj.sd && |
5968 | sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
5969 | pr_warn("md: cannot register extra attributes for %s\n", |
5970 | mdname(mddev)); | |
00bcb4ac | 5971 | mddev->sysfs_action = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_action"); |
5e55e2f5 | 5972 | } else if (mddev->ro == 2) /* auto-readonly not meaningful */ |
fd9d49ca N |
5973 | mddev->ro = 0; |
5974 | ||
1e50915f RB |
5975 | atomic_set(&mddev->max_corr_read_errors, |
5976 | MD_DEFAULT_MAX_CORRECTED_READ_ERRORS); | |
1da177e4 | 5977 | mddev->safemode = 0; |
28c1b9fd GR |
5978 | if (mddev_is_clustered(mddev)) |
5979 | mddev->safemode_delay = 0; | |
5980 | else | |
5981 | mddev->safemode_delay = (200 * HZ)/1000 +1; /* 200 msec delay */ | |
1da177e4 | 5982 | mddev->in_sync = 1; |
0ca69886 | 5983 | smp_wmb(); |
36d091f4 N |
5984 | spin_lock(&mddev->lock); |
5985 | mddev->pers = pers; | |
36d091f4 | 5986 | spin_unlock(&mddev->lock); |
dafb20fa | 5987 | rdev_for_each(rdev, mddev) |
36fad858 | 5988 | if (rdev->raid_disk >= 0) |
e5b521ee | 5989 | sysfs_link_rdev(mddev, rdev); /* failure here is OK */ |
f72ffdd6 | 5990 | |
a4a3d26d N |
5991 | if (mddev->degraded && !mddev->ro) |
5992 | /* This ensures that recovering status is reported immediately | |
5993 | * via sysfs - until a lack of spares is confirmed. | |
5994 | */ | |
5995 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
1da177e4 | 5996 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f72ffdd6 | 5997 | |
2953079c | 5998 | if (mddev->sb_flags) |
850b2b42 | 5999 | md_update_sb(mddev, 0); |
1da177e4 | 6000 | |
d7603b7e | 6001 | md_new_event(mddev); |
1da177e4 | 6002 | return 0; |
b126194c | 6003 | |
d494549a GJ |
6004 | bitmap_abort: |
6005 | mddev_detach(mddev); | |
6006 | if (mddev->private) | |
6007 | pers->free(mddev, mddev->private); | |
6008 | mddev->private = NULL; | |
6009 | module_put(pers->owner); | |
6010 | md_bitmap_destroy(mddev); | |
b126194c | 6011 | abort: |
4bc034d3 N |
6012 | bioset_exit(&mddev->bio_set); |
6013 | bioset_exit(&mddev->sync_set); | |
b126194c | 6014 | return err; |
1da177e4 | 6015 | } |
390ee602 | 6016 | EXPORT_SYMBOL_GPL(md_run); |
1da177e4 | 6017 | |
fd01b88c | 6018 | static int do_md_run(struct mddev *mddev) |
fe60b014 N |
6019 | { |
6020 | int err; | |
6021 | ||
9d4b45d6 | 6022 | set_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
6023 | err = md_run(mddev); |
6024 | if (err) | |
6025 | goto out; | |
e64e4018 | 6026 | err = md_bitmap_load(mddev); |
69e51b44 | 6027 | if (err) { |
e64e4018 | 6028 | md_bitmap_destroy(mddev); |
69e51b44 N |
6029 | goto out; |
6030 | } | |
0fd018af | 6031 | |
28c1b9fd GR |
6032 | if (mddev_is_clustered(mddev)) |
6033 | md_allow_write(mddev); | |
6034 | ||
d5d885fd SL |
6035 | /* run start up tasks that require md_thread */ |
6036 | md_start(mddev); | |
6037 | ||
0fd018af JB |
6038 | md_wakeup_thread(mddev->thread); |
6039 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
6040 | ||
fe60b014 N |
6041 | set_capacity(mddev->gendisk, mddev->array_sectors); |
6042 | revalidate_disk(mddev->gendisk); | |
9d4b45d6 | 6043 | clear_bit(MD_NOT_READY, &mddev->flags); |
f0b4f7e2 | 6044 | mddev->changed = 1; |
fe60b014 | 6045 | kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); |
9d4b45d6 N |
6046 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6047 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
6048 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
fe60b014 | 6049 | out: |
9d4b45d6 | 6050 | clear_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
6051 | return err; |
6052 | } | |
6053 | ||
d5d885fd SL |
6054 | int md_start(struct mddev *mddev) |
6055 | { | |
6056 | int ret = 0; | |
6057 | ||
6058 | if (mddev->pers->start) { | |
6059 | set_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
6060 | md_wakeup_thread(mddev->thread); | |
6061 | ret = mddev->pers->start(mddev); | |
6062 | clear_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
6063 | md_wakeup_thread(mddev->sync_thread); | |
6064 | } | |
6065 | return ret; | |
6066 | } | |
6067 | EXPORT_SYMBOL_GPL(md_start); | |
6068 | ||
fd01b88c | 6069 | static int restart_array(struct mddev *mddev) |
1da177e4 LT |
6070 | { |
6071 | struct gendisk *disk = mddev->gendisk; | |
97b20ef7 N |
6072 | struct md_rdev *rdev; |
6073 | bool has_journal = false; | |
6074 | bool has_readonly = false; | |
1da177e4 | 6075 | |
80fab1d7 | 6076 | /* Complain if it has no devices */ |
1da177e4 | 6077 | if (list_empty(&mddev->disks)) |
80fab1d7 AN |
6078 | return -ENXIO; |
6079 | if (!mddev->pers) | |
6080 | return -EINVAL; | |
6081 | if (!mddev->ro) | |
6082 | return -EBUSY; | |
339421de | 6083 | |
97b20ef7 N |
6084 | rcu_read_lock(); |
6085 | rdev_for_each_rcu(rdev, mddev) { | |
6086 | if (test_bit(Journal, &rdev->flags) && | |
6087 | !test_bit(Faulty, &rdev->flags)) | |
6088 | has_journal = true; | |
6089 | if (bdev_read_only(rdev->bdev)) | |
6090 | has_readonly = true; | |
6091 | } | |
6092 | rcu_read_unlock(); | |
6093 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags) && !has_journal) | |
339421de | 6094 | /* Don't restart rw with journal missing/faulty */ |
339421de | 6095 | return -EINVAL; |
97b20ef7 N |
6096 | if (has_readonly) |
6097 | return -EROFS; | |
339421de | 6098 | |
80fab1d7 AN |
6099 | mddev->safemode = 0; |
6100 | mddev->ro = 0; | |
6101 | set_disk_ro(disk, 0); | |
9d48739e | 6102 | pr_debug("md: %s switched to read-write mode.\n", mdname(mddev)); |
80fab1d7 AN |
6103 | /* Kick recovery or resync if necessary */ |
6104 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6105 | md_wakeup_thread(mddev->thread); | |
6106 | md_wakeup_thread(mddev->sync_thread); | |
00bcb4ac | 6107 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
80fab1d7 | 6108 | return 0; |
1da177e4 LT |
6109 | } |
6110 | ||
fd01b88c | 6111 | static void md_clean(struct mddev *mddev) |
6177b472 N |
6112 | { |
6113 | mddev->array_sectors = 0; | |
6114 | mddev->external_size = 0; | |
6115 | mddev->dev_sectors = 0; | |
6116 | mddev->raid_disks = 0; | |
6117 | mddev->recovery_cp = 0; | |
6118 | mddev->resync_min = 0; | |
6119 | mddev->resync_max = MaxSector; | |
6120 | mddev->reshape_position = MaxSector; | |
6121 | mddev->external = 0; | |
6122 | mddev->persistent = 0; | |
6123 | mddev->level = LEVEL_NONE; | |
6124 | mddev->clevel[0] = 0; | |
6125 | mddev->flags = 0; | |
2953079c | 6126 | mddev->sb_flags = 0; |
6177b472 N |
6127 | mddev->ro = 0; |
6128 | mddev->metadata_type[0] = 0; | |
6129 | mddev->chunk_sectors = 0; | |
6130 | mddev->ctime = mddev->utime = 0; | |
6131 | mddev->layout = 0; | |
6132 | mddev->max_disks = 0; | |
6133 | mddev->events = 0; | |
a8707c08 | 6134 | mddev->can_decrease_events = 0; |
6177b472 | 6135 | mddev->delta_disks = 0; |
2c810cdd | 6136 | mddev->reshape_backwards = 0; |
6177b472 N |
6137 | mddev->new_level = LEVEL_NONE; |
6138 | mddev->new_layout = 0; | |
6139 | mddev->new_chunk_sectors = 0; | |
6140 | mddev->curr_resync = 0; | |
7f7583d4 | 6141 | atomic64_set(&mddev->resync_mismatches, 0); |
6177b472 N |
6142 | mddev->suspend_lo = mddev->suspend_hi = 0; |
6143 | mddev->sync_speed_min = mddev->sync_speed_max = 0; | |
6144 | mddev->recovery = 0; | |
6145 | mddev->in_sync = 0; | |
f0b4f7e2 | 6146 | mddev->changed = 0; |
6177b472 | 6147 | mddev->degraded = 0; |
6177b472 | 6148 | mddev->safemode = 0; |
bd691922 | 6149 | mddev->private = NULL; |
c20c33f0 | 6150 | mddev->cluster_info = NULL; |
6177b472 N |
6151 | mddev->bitmap_info.offset = 0; |
6152 | mddev->bitmap_info.default_offset = 0; | |
6409bb05 | 6153 | mddev->bitmap_info.default_space = 0; |
6177b472 N |
6154 | mddev->bitmap_info.chunksize = 0; |
6155 | mddev->bitmap_info.daemon_sleep = 0; | |
6156 | mddev->bitmap_info.max_write_behind = 0; | |
c20c33f0 | 6157 | mddev->bitmap_info.nodes = 0; |
6177b472 N |
6158 | } |
6159 | ||
fd01b88c | 6160 | static void __md_stop_writes(struct mddev *mddev) |
a047e125 | 6161 | { |
6b6204ee | 6162 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
21e0958e GJ |
6163 | if (work_pending(&mddev->del_work)) |
6164 | flush_workqueue(md_misc_wq); | |
a047e125 | 6165 | if (mddev->sync_thread) { |
a047e125 | 6166 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
a91d5ac0 | 6167 | md_reap_sync_thread(mddev); |
a047e125 N |
6168 | } |
6169 | ||
6170 | del_timer_sync(&mddev->safemode_timer); | |
6171 | ||
034e33f5 SL |
6172 | if (mddev->pers && mddev->pers->quiesce) { |
6173 | mddev->pers->quiesce(mddev, 1); | |
6174 | mddev->pers->quiesce(mddev, 0); | |
6175 | } | |
e64e4018 | 6176 | md_bitmap_flush(mddev); |
a047e125 | 6177 | |
b6d428c6 | 6178 | if (mddev->ro == 0 && |
28c1b9fd | 6179 | ((!mddev->in_sync && !mddev_is_clustered(mddev)) || |
2953079c | 6180 | mddev->sb_flags)) { |
a047e125 | 6181 | /* mark array as shutdown cleanly */ |
28c1b9fd GR |
6182 | if (!mddev_is_clustered(mddev)) |
6183 | mddev->in_sync = 1; | |
a047e125 N |
6184 | md_update_sb(mddev, 1); |
6185 | } | |
69b00b5b GJ |
6186 | /* disable policy to guarantee rdevs free resources for serialization */ |
6187 | mddev->serialize_policy = 0; | |
6188 | mddev_destroy_serial_pool(mddev, NULL, true); | |
a047e125 | 6189 | } |
defad61a | 6190 | |
fd01b88c | 6191 | void md_stop_writes(struct mddev *mddev) |
defad61a | 6192 | { |
29f097c4 | 6193 | mddev_lock_nointr(mddev); |
defad61a N |
6194 | __md_stop_writes(mddev); |
6195 | mddev_unlock(mddev); | |
6196 | } | |
390ee602 | 6197 | EXPORT_SYMBOL_GPL(md_stop_writes); |
a047e125 | 6198 | |
5aa61f42 N |
6199 | static void mddev_detach(struct mddev *mddev) |
6200 | { | |
e64e4018 | 6201 | md_bitmap_wait_behind_writes(mddev); |
6b40bec3 | 6202 | if (mddev->pers && mddev->pers->quiesce && !mddev->suspended) { |
5aa61f42 N |
6203 | mddev->pers->quiesce(mddev, 1); |
6204 | mddev->pers->quiesce(mddev, 0); | |
6205 | } | |
6206 | md_unregister_thread(&mddev->thread); | |
6207 | if (mddev->queue) | |
6208 | blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ | |
6209 | } | |
6210 | ||
5eff3c43 | 6211 | static void __md_stop(struct mddev *mddev) |
6177b472 | 6212 | { |
36d091f4 | 6213 | struct md_personality *pers = mddev->pers; |
e64e4018 | 6214 | md_bitmap_destroy(mddev); |
5aa61f42 | 6215 | mddev_detach(mddev); |
ee5d004f | 6216 | /* Ensure ->event_work is done */ |
21e0958e GJ |
6217 | if (mddev->event_work.func) |
6218 | flush_workqueue(md_misc_wq); | |
36d091f4 | 6219 | spin_lock(&mddev->lock); |
6177b472 | 6220 | mddev->pers = NULL; |
36d091f4 N |
6221 | spin_unlock(&mddev->lock); |
6222 | pers->free(mddev, mddev->private); | |
bd691922 | 6223 | mddev->private = NULL; |
36d091f4 N |
6224 | if (pers->sync_request && mddev->to_remove == NULL) |
6225 | mddev->to_remove = &md_redundancy_group; | |
6226 | module_put(pers->owner); | |
cca9cf90 | 6227 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
6aaa58c9 JW |
6228 | } |
6229 | ||
6230 | void md_stop(struct mddev *mddev) | |
6231 | { | |
6232 | /* stop the array and free an attached data structures. | |
6233 | * This is called from dm-raid | |
6234 | */ | |
6235 | __md_stop(mddev); | |
afeee514 KO |
6236 | bioset_exit(&mddev->bio_set); |
6237 | bioset_exit(&mddev->sync_set); | |
5eff3c43 N |
6238 | } |
6239 | ||
390ee602 | 6240 | EXPORT_SYMBOL_GPL(md_stop); |
6177b472 | 6241 | |
a05b7ea0 | 6242 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) |
a4bd82d0 N |
6243 | { |
6244 | int err = 0; | |
30b8feb7 N |
6245 | int did_freeze = 0; |
6246 | ||
6247 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6248 | did_freeze = 1; | |
6249 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6250 | md_wakeup_thread(mddev->thread); | |
6251 | } | |
f851b60d | 6252 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6253 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6254 | if (mddev->sync_thread) |
30b8feb7 N |
6255 | /* Thread might be blocked waiting for metadata update |
6256 | * which will now never happen */ | |
6257 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6258 | |
2953079c | 6259 | if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
88724bfa | 6260 | return -EBUSY; |
30b8feb7 | 6261 | mddev_unlock(mddev); |
f851b60d N |
6262 | wait_event(resync_wait, !test_bit(MD_RECOVERY_RUNNING, |
6263 | &mddev->recovery)); | |
88724bfa | 6264 | wait_event(mddev->sb_wait, |
2953079c | 6265 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
30b8feb7 N |
6266 | mddev_lock_nointr(mddev); |
6267 | ||
a4bd82d0 | 6268 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6269 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 | 6270 | mddev->sync_thread || |
af8d8e6f | 6271 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6272 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
30b8feb7 N |
6273 | if (did_freeze) { |
6274 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6275 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6276 | md_wakeup_thread(mddev->thread); |
6277 | } | |
a4bd82d0 N |
6278 | err = -EBUSY; |
6279 | goto out; | |
6280 | } | |
6281 | if (mddev->pers) { | |
defad61a | 6282 | __md_stop_writes(mddev); |
a4bd82d0 N |
6283 | |
6284 | err = -ENXIO; | |
6285 | if (mddev->ro==1) | |
6286 | goto out; | |
6287 | mddev->ro = 1; | |
6288 | set_disk_ro(mddev->gendisk, 1); | |
6289 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d N |
6290 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
6291 | md_wakeup_thread(mddev->thread); | |
00bcb4ac | 6292 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
30b8feb7 | 6293 | err = 0; |
a4bd82d0 N |
6294 | } |
6295 | out: | |
6296 | mutex_unlock(&mddev->open_mutex); | |
6297 | return err; | |
6298 | } | |
6299 | ||
9e653b63 N |
6300 | /* mode: |
6301 | * 0 - completely stop and dis-assemble array | |
9e653b63 N |
6302 | * 2 - stop but do not disassemble array |
6303 | */ | |
f72ffdd6 | 6304 | static int do_md_stop(struct mddev *mddev, int mode, |
a05b7ea0 | 6305 | struct block_device *bdev) |
1da177e4 | 6306 | { |
1da177e4 | 6307 | struct gendisk *disk = mddev->gendisk; |
3cb03002 | 6308 | struct md_rdev *rdev; |
30b8feb7 N |
6309 | int did_freeze = 0; |
6310 | ||
6311 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6312 | did_freeze = 1; | |
6313 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6314 | md_wakeup_thread(mddev->thread); | |
6315 | } | |
f851b60d | 6316 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6317 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6318 | if (mddev->sync_thread) |
30b8feb7 N |
6319 | /* Thread might be blocked waiting for metadata update |
6320 | * which will now never happen */ | |
6321 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6322 | |
30b8feb7 | 6323 | mddev_unlock(mddev); |
f851b60d N |
6324 | wait_event(resync_wait, (mddev->sync_thread == NULL && |
6325 | !test_bit(MD_RECOVERY_RUNNING, | |
6326 | &mddev->recovery))); | |
30b8feb7 | 6327 | mddev_lock_nointr(mddev); |
1da177e4 | 6328 | |
c8c00a69 | 6329 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6330 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 N |
6331 | mddev->sysfs_active || |
6332 | mddev->sync_thread || | |
af8d8e6f | 6333 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6334 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
6e17b027 | 6335 | mutex_unlock(&mddev->open_mutex); |
30b8feb7 N |
6336 | if (did_freeze) { |
6337 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6338 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6339 | md_wakeup_thread(mddev->thread); |
6340 | } | |
260fa034 N |
6341 | return -EBUSY; |
6342 | } | |
6e17b027 | 6343 | if (mddev->pers) { |
a4bd82d0 N |
6344 | if (mddev->ro) |
6345 | set_disk_ro(disk, 0); | |
409c57f3 | 6346 | |
defad61a | 6347 | __md_stop_writes(mddev); |
5eff3c43 | 6348 | __md_stop(mddev); |
dc3b17cc | 6349 | mddev->queue->backing_dev_info->congested_fn = NULL; |
6177b472 | 6350 | |
a4bd82d0 | 6351 | /* tell userspace to handle 'inactive' */ |
00bcb4ac | 6352 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0d4ca600 | 6353 | |
dafb20fa | 6354 | rdev_for_each(rdev, mddev) |
36fad858 NK |
6355 | if (rdev->raid_disk >= 0) |
6356 | sysfs_unlink_rdev(mddev, rdev); | |
c4647292 | 6357 | |
a4bd82d0 | 6358 | set_capacity(disk, 0); |
6e17b027 | 6359 | mutex_unlock(&mddev->open_mutex); |
f0b4f7e2 | 6360 | mddev->changed = 1; |
a4bd82d0 | 6361 | revalidate_disk(disk); |
0d4ca600 | 6362 | |
a4bd82d0 N |
6363 | if (mddev->ro) |
6364 | mddev->ro = 0; | |
6e17b027 N |
6365 | } else |
6366 | mutex_unlock(&mddev->open_mutex); | |
1da177e4 LT |
6367 | /* |
6368 | * Free resources if final stop | |
6369 | */ | |
9e653b63 | 6370 | if (mode == 0) { |
9d48739e | 6371 | pr_info("md: %s stopped.\n", mdname(mddev)); |
1da177e4 | 6372 | |
c3d9714e | 6373 | if (mddev->bitmap_info.file) { |
4af1a041 N |
6374 | struct file *f = mddev->bitmap_info.file; |
6375 | spin_lock(&mddev->lock); | |
c3d9714e | 6376 | mddev->bitmap_info.file = NULL; |
4af1a041 N |
6377 | spin_unlock(&mddev->lock); |
6378 | fput(f); | |
978f946b | 6379 | } |
c3d9714e | 6380 | mddev->bitmap_info.offset = 0; |
978f946b | 6381 | |
1da177e4 LT |
6382 | export_array(mddev); |
6383 | ||
6177b472 | 6384 | md_clean(mddev); |
efeb53c0 N |
6385 | if (mddev->hold_active == UNTIL_STOP) |
6386 | mddev->hold_active = 0; | |
a4bd82d0 | 6387 | } |
d7603b7e | 6388 | md_new_event(mddev); |
00bcb4ac | 6389 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6e17b027 | 6390 | return 0; |
1da177e4 LT |
6391 | } |
6392 | ||
fdee8ae4 | 6393 | #ifndef MODULE |
fd01b88c | 6394 | static void autorun_array(struct mddev *mddev) |
1da177e4 | 6395 | { |
3cb03002 | 6396 | struct md_rdev *rdev; |
1da177e4 LT |
6397 | int err; |
6398 | ||
a757e64c | 6399 | if (list_empty(&mddev->disks)) |
1da177e4 | 6400 | return; |
1da177e4 | 6401 | |
9d48739e | 6402 | pr_info("md: running: "); |
1da177e4 | 6403 | |
dafb20fa | 6404 | rdev_for_each(rdev, mddev) { |
1da177e4 | 6405 | char b[BDEVNAME_SIZE]; |
9d48739e | 6406 | pr_cont("<%s>", bdevname(rdev->bdev,b)); |
1da177e4 | 6407 | } |
9d48739e | 6408 | pr_cont("\n"); |
1da177e4 | 6409 | |
d710e138 | 6410 | err = do_md_run(mddev); |
1da177e4 | 6411 | if (err) { |
9d48739e | 6412 | pr_warn("md: do_md_run() returned %d\n", err); |
a05b7ea0 | 6413 | do_md_stop(mddev, 0, NULL); |
1da177e4 LT |
6414 | } |
6415 | } | |
6416 | ||
6417 | /* | |
6418 | * lets try to run arrays based on all disks that have arrived | |
6419 | * until now. (those are in pending_raid_disks) | |
6420 | * | |
6421 | * the method: pick the first pending disk, collect all disks with | |
6422 | * the same UUID, remove all from the pending list and put them into | |
6423 | * the 'same_array' list. Then order this list based on superblock | |
6424 | * update time (freshest comes first), kick out 'old' disks and | |
6425 | * compare superblocks. If everything's fine then run it. | |
6426 | * | |
6427 | * If "unit" is allocated, then bump its reference count | |
6428 | */ | |
6429 | static void autorun_devices(int part) | |
6430 | { | |
3cb03002 | 6431 | struct md_rdev *rdev0, *rdev, *tmp; |
fd01b88c | 6432 | struct mddev *mddev; |
1da177e4 LT |
6433 | char b[BDEVNAME_SIZE]; |
6434 | ||
9d48739e | 6435 | pr_info("md: autorun ...\n"); |
1da177e4 | 6436 | while (!list_empty(&pending_raid_disks)) { |
e8703fe1 | 6437 | int unit; |
1da177e4 | 6438 | dev_t dev; |
ad01c9e3 | 6439 | LIST_HEAD(candidates); |
1da177e4 | 6440 | rdev0 = list_entry(pending_raid_disks.next, |
3cb03002 | 6441 | struct md_rdev, same_set); |
1da177e4 | 6442 | |
9d48739e | 6443 | pr_debug("md: considering %s ...\n", bdevname(rdev0->bdev,b)); |
1da177e4 | 6444 | INIT_LIST_HEAD(&candidates); |
159ec1fc | 6445 | rdev_for_each_list(rdev, tmp, &pending_raid_disks) |
1da177e4 | 6446 | if (super_90_load(rdev, rdev0, 0) >= 0) { |
9d48739e N |
6447 | pr_debug("md: adding %s ...\n", |
6448 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
6449 | list_move(&rdev->same_set, &candidates); |
6450 | } | |
6451 | /* | |
6452 | * now we have a set of devices, with all of them having | |
6453 | * mostly sane superblocks. It's time to allocate the | |
6454 | * mddev. | |
6455 | */ | |
e8703fe1 N |
6456 | if (part) { |
6457 | dev = MKDEV(mdp_major, | |
6458 | rdev0->preferred_minor << MdpMinorShift); | |
6459 | unit = MINOR(dev) >> MdpMinorShift; | |
6460 | } else { | |
6461 | dev = MKDEV(MD_MAJOR, rdev0->preferred_minor); | |
6462 | unit = MINOR(dev); | |
6463 | } | |
6464 | if (rdev0->preferred_minor != unit) { | |
9d48739e N |
6465 | pr_warn("md: unit number in %s is bad: %d\n", |
6466 | bdevname(rdev0->bdev, b), rdev0->preferred_minor); | |
1da177e4 LT |
6467 | break; |
6468 | } | |
1da177e4 LT |
6469 | |
6470 | md_probe(dev, NULL, NULL); | |
6471 | mddev = mddev_find(dev); | |
9bbbca3a NB |
6472 | if (!mddev || !mddev->gendisk) { |
6473 | if (mddev) | |
6474 | mddev_put(mddev); | |
1da177e4 LT |
6475 | break; |
6476 | } | |
f72ffdd6 | 6477 | if (mddev_lock(mddev)) |
9d48739e | 6478 | pr_warn("md: %s locked, cannot run\n", mdname(mddev)); |
1da177e4 LT |
6479 | else if (mddev->raid_disks || mddev->major_version |
6480 | || !list_empty(&mddev->disks)) { | |
9d48739e | 6481 | pr_warn("md: %s already running, cannot run %s\n", |
1da177e4 LT |
6482 | mdname(mddev), bdevname(rdev0->bdev,b)); |
6483 | mddev_unlock(mddev); | |
6484 | } else { | |
9d48739e | 6485 | pr_debug("md: created %s\n", mdname(mddev)); |
1ec4a939 | 6486 | mddev->persistent = 1; |
159ec1fc | 6487 | rdev_for_each_list(rdev, tmp, &candidates) { |
1da177e4 LT |
6488 | list_del_init(&rdev->same_set); |
6489 | if (bind_rdev_to_array(rdev, mddev)) | |
6490 | export_rdev(rdev); | |
6491 | } | |
6492 | autorun_array(mddev); | |
6493 | mddev_unlock(mddev); | |
6494 | } | |
6495 | /* on success, candidates will be empty, on error | |
6496 | * it won't... | |
6497 | */ | |
159ec1fc | 6498 | rdev_for_each_list(rdev, tmp, &candidates) { |
4b80991c | 6499 | list_del_init(&rdev->same_set); |
1da177e4 | 6500 | export_rdev(rdev); |
4b80991c | 6501 | } |
1da177e4 LT |
6502 | mddev_put(mddev); |
6503 | } | |
9d48739e | 6504 | pr_info("md: ... autorun DONE.\n"); |
1da177e4 | 6505 | } |
fdee8ae4 | 6506 | #endif /* !MODULE */ |
1da177e4 | 6507 | |
f72ffdd6 | 6508 | static int get_version(void __user *arg) |
1da177e4 LT |
6509 | { |
6510 | mdu_version_t ver; | |
6511 | ||
6512 | ver.major = MD_MAJOR_VERSION; | |
6513 | ver.minor = MD_MINOR_VERSION; | |
6514 | ver.patchlevel = MD_PATCHLEVEL_VERSION; | |
6515 | ||
6516 | if (copy_to_user(arg, &ver, sizeof(ver))) | |
6517 | return -EFAULT; | |
6518 | ||
6519 | return 0; | |
6520 | } | |
6521 | ||
f72ffdd6 | 6522 | static int get_array_info(struct mddev *mddev, void __user *arg) |
1da177e4 LT |
6523 | { |
6524 | mdu_array_info_t info; | |
a9f326eb | 6525 | int nr,working,insync,failed,spare; |
3cb03002 | 6526 | struct md_rdev *rdev; |
1da177e4 | 6527 | |
1ca69c4b N |
6528 | nr = working = insync = failed = spare = 0; |
6529 | rcu_read_lock(); | |
6530 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 6531 | nr++; |
b2d444d7 | 6532 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
6533 | failed++; |
6534 | else { | |
6535 | working++; | |
b2d444d7 | 6536 | if (test_bit(In_sync, &rdev->flags)) |
f72ffdd6 | 6537 | insync++; |
b347af81 SL |
6538 | else if (test_bit(Journal, &rdev->flags)) |
6539 | /* TODO: add journal count to md_u.h */ | |
6540 | ; | |
1da177e4 LT |
6541 | else |
6542 | spare++; | |
6543 | } | |
6544 | } | |
1ca69c4b | 6545 | rcu_read_unlock(); |
1da177e4 LT |
6546 | |
6547 | info.major_version = mddev->major_version; | |
6548 | info.minor_version = mddev->minor_version; | |
6549 | info.patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6550 | info.ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 6551 | info.level = mddev->level; |
58c0fed4 AN |
6552 | info.size = mddev->dev_sectors / 2; |
6553 | if (info.size != mddev->dev_sectors / 2) /* overflow */ | |
284ae7ca | 6554 | info.size = -1; |
1da177e4 LT |
6555 | info.nr_disks = nr; |
6556 | info.raid_disks = mddev->raid_disks; | |
6557 | info.md_minor = mddev->md_minor; | |
6558 | info.not_persistent= !mddev->persistent; | |
6559 | ||
9ebc6ef1 | 6560 | info.utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
6561 | info.state = 0; |
6562 | if (mddev->in_sync) | |
6563 | info.state = (1<<MD_SB_CLEAN); | |
c3d9714e | 6564 | if (mddev->bitmap && mddev->bitmap_info.offset) |
9bd35920 | 6565 | info.state |= (1<<MD_SB_BITMAP_PRESENT); |
ca8895d9 GR |
6566 | if (mddev_is_clustered(mddev)) |
6567 | info.state |= (1<<MD_SB_CLUSTERED); | |
a9f326eb | 6568 | info.active_disks = insync; |
1da177e4 LT |
6569 | info.working_disks = working; |
6570 | info.failed_disks = failed; | |
6571 | info.spare_disks = spare; | |
6572 | ||
6573 | info.layout = mddev->layout; | |
9d8f0363 | 6574 | info.chunk_size = mddev->chunk_sectors << 9; |
1da177e4 LT |
6575 | |
6576 | if (copy_to_user(arg, &info, sizeof(info))) | |
6577 | return -EFAULT; | |
6578 | ||
6579 | return 0; | |
6580 | } | |
6581 | ||
f72ffdd6 | 6582 | static int get_bitmap_file(struct mddev *mddev, void __user * arg) |
32a7627c N |
6583 | { |
6584 | mdu_bitmap_file_t *file = NULL; /* too big for stack allocation */ | |
f4ad3d38 | 6585 | char *ptr; |
4af1a041 | 6586 | int err; |
32a7627c | 6587 | |
b6878d9e | 6588 | file = kzalloc(sizeof(*file), GFP_NOIO); |
32a7627c | 6589 | if (!file) |
4af1a041 | 6590 | return -ENOMEM; |
32a7627c | 6591 | |
4af1a041 N |
6592 | err = 0; |
6593 | spin_lock(&mddev->lock); | |
25eafe1a BR |
6594 | /* bitmap enabled */ |
6595 | if (mddev->bitmap_info.file) { | |
6596 | ptr = file_path(mddev->bitmap_info.file, file->pathname, | |
6597 | sizeof(file->pathname)); | |
6598 | if (IS_ERR(ptr)) | |
6599 | err = PTR_ERR(ptr); | |
6600 | else | |
6601 | memmove(file->pathname, ptr, | |
6602 | sizeof(file->pathname)-(ptr-file->pathname)); | |
6603 | } | |
4af1a041 | 6604 | spin_unlock(&mddev->lock); |
32a7627c | 6605 | |
4af1a041 N |
6606 | if (err == 0 && |
6607 | copy_to_user(arg, file, sizeof(*file))) | |
32a7627c | 6608 | err = -EFAULT; |
4af1a041 | 6609 | |
32a7627c N |
6610 | kfree(file); |
6611 | return err; | |
6612 | } | |
6613 | ||
f72ffdd6 | 6614 | static int get_disk_info(struct mddev *mddev, void __user * arg) |
1da177e4 LT |
6615 | { |
6616 | mdu_disk_info_t info; | |
3cb03002 | 6617 | struct md_rdev *rdev; |
1da177e4 LT |
6618 | |
6619 | if (copy_from_user(&info, arg, sizeof(info))) | |
6620 | return -EFAULT; | |
6621 | ||
1ca69c4b | 6622 | rcu_read_lock(); |
57d051dc | 6623 | rdev = md_find_rdev_nr_rcu(mddev, info.number); |
1da177e4 LT |
6624 | if (rdev) { |
6625 | info.major = MAJOR(rdev->bdev->bd_dev); | |
6626 | info.minor = MINOR(rdev->bdev->bd_dev); | |
6627 | info.raid_disk = rdev->raid_disk; | |
6628 | info.state = 0; | |
b2d444d7 | 6629 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 6630 | info.state |= (1<<MD_DISK_FAULTY); |
b2d444d7 | 6631 | else if (test_bit(In_sync, &rdev->flags)) { |
1da177e4 LT |
6632 | info.state |= (1<<MD_DISK_ACTIVE); |
6633 | info.state |= (1<<MD_DISK_SYNC); | |
6634 | } | |
9efdca16 | 6635 | if (test_bit(Journal, &rdev->flags)) |
bac624f3 | 6636 | info.state |= (1<<MD_DISK_JOURNAL); |
8ddf9efe N |
6637 | if (test_bit(WriteMostly, &rdev->flags)) |
6638 | info.state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
6639 | if (test_bit(FailFast, &rdev->flags)) |
6640 | info.state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 LT |
6641 | } else { |
6642 | info.major = info.minor = 0; | |
6643 | info.raid_disk = -1; | |
6644 | info.state = (1<<MD_DISK_REMOVED); | |
6645 | } | |
1ca69c4b | 6646 | rcu_read_unlock(); |
1da177e4 LT |
6647 | |
6648 | if (copy_to_user(arg, &info, sizeof(info))) | |
6649 | return -EFAULT; | |
6650 | ||
6651 | return 0; | |
6652 | } | |
6653 | ||
f72ffdd6 | 6654 | static int add_new_disk(struct mddev *mddev, mdu_disk_info_t *info) |
1da177e4 LT |
6655 | { |
6656 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 6657 | struct md_rdev *rdev; |
1da177e4 LT |
6658 | dev_t dev = MKDEV(info->major,info->minor); |
6659 | ||
1aee41f6 GR |
6660 | if (mddev_is_clustered(mddev) && |
6661 | !(info->state & ((1 << MD_DISK_CLUSTER_ADD) | (1 << MD_DISK_CANDIDATE)))) { | |
9d48739e N |
6662 | pr_warn("%s: Cannot add to clustered mddev.\n", |
6663 | mdname(mddev)); | |
1aee41f6 GR |
6664 | return -EINVAL; |
6665 | } | |
6666 | ||
1da177e4 LT |
6667 | if (info->major != MAJOR(dev) || info->minor != MINOR(dev)) |
6668 | return -EOVERFLOW; | |
6669 | ||
6670 | if (!mddev->raid_disks) { | |
6671 | int err; | |
6672 | /* expecting a device which has a superblock */ | |
6673 | rdev = md_import_device(dev, mddev->major_version, mddev->minor_version); | |
6674 | if (IS_ERR(rdev)) { | |
9d48739e | 6675 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6676 | PTR_ERR(rdev)); |
6677 | return PTR_ERR(rdev); | |
6678 | } | |
6679 | if (!list_empty(&mddev->disks)) { | |
3cb03002 N |
6680 | struct md_rdev *rdev0 |
6681 | = list_entry(mddev->disks.next, | |
6682 | struct md_rdev, same_set); | |
a9f326eb | 6683 | err = super_types[mddev->major_version] |
1da177e4 LT |
6684 | .load_super(rdev, rdev0, mddev->minor_version); |
6685 | if (err < 0) { | |
9d48739e | 6686 | pr_warn("md: %s has different UUID to %s\n", |
f72ffdd6 | 6687 | bdevname(rdev->bdev,b), |
1da177e4 LT |
6688 | bdevname(rdev0->bdev,b2)); |
6689 | export_rdev(rdev); | |
6690 | return -EINVAL; | |
6691 | } | |
6692 | } | |
6693 | err = bind_rdev_to_array(rdev, mddev); | |
6694 | if (err) | |
6695 | export_rdev(rdev); | |
6696 | return err; | |
6697 | } | |
6698 | ||
6699 | /* | |
6700 | * add_new_disk can be used once the array is assembled | |
6701 | * to add "hot spares". They must already have a superblock | |
6702 | * written | |
6703 | */ | |
6704 | if (mddev->pers) { | |
6705 | int err; | |
6706 | if (!mddev->pers->hot_add_disk) { | |
9d48739e N |
6707 | pr_warn("%s: personality does not support diskops!\n", |
6708 | mdname(mddev)); | |
1da177e4 LT |
6709 | return -EINVAL; |
6710 | } | |
7b1e35f6 N |
6711 | if (mddev->persistent) |
6712 | rdev = md_import_device(dev, mddev->major_version, | |
6713 | mddev->minor_version); | |
6714 | else | |
6715 | rdev = md_import_device(dev, -1, -1); | |
1da177e4 | 6716 | if (IS_ERR(rdev)) { |
9d48739e | 6717 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6718 | PTR_ERR(rdev)); |
6719 | return PTR_ERR(rdev); | |
6720 | } | |
1a855a06 | 6721 | /* set saved_raid_disk if appropriate */ |
41158c7e N |
6722 | if (!mddev->persistent) { |
6723 | if (info->state & (1<<MD_DISK_SYNC) && | |
bf572541 | 6724 | info->raid_disk < mddev->raid_disks) { |
41158c7e | 6725 | rdev->raid_disk = info->raid_disk; |
bf572541 | 6726 | set_bit(In_sync, &rdev->flags); |
8313b8e5 | 6727 | clear_bit(Bitmap_sync, &rdev->flags); |
bf572541 | 6728 | } else |
41158c7e | 6729 | rdev->raid_disk = -1; |
f466722c | 6730 | rdev->saved_raid_disk = rdev->raid_disk; |
41158c7e N |
6731 | } else |
6732 | super_types[mddev->major_version]. | |
6733 | validate_super(mddev, rdev); | |
bedd86b7 | 6734 | if ((info->state & (1<<MD_DISK_SYNC)) && |
f4563091 | 6735 | rdev->raid_disk != info->raid_disk) { |
bedd86b7 N |
6736 | /* This was a hot-add request, but events doesn't |
6737 | * match, so reject it. | |
6738 | */ | |
6739 | export_rdev(rdev); | |
6740 | return -EINVAL; | |
6741 | } | |
6742 | ||
b2d444d7 | 6743 | clear_bit(In_sync, &rdev->flags); /* just to be sure */ |
8ddf9efe N |
6744 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6745 | set_bit(WriteMostly, &rdev->flags); | |
575a80fa N |
6746 | else |
6747 | clear_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6748 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6749 | set_bit(FailFast, &rdev->flags); | |
6750 | else | |
6751 | clear_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6752 | |
f6b6ec5c SL |
6753 | if (info->state & (1<<MD_DISK_JOURNAL)) { |
6754 | struct md_rdev *rdev2; | |
6755 | bool has_journal = false; | |
6756 | ||
6757 | /* make sure no existing journal disk */ | |
6758 | rdev_for_each(rdev2, mddev) { | |
6759 | if (test_bit(Journal, &rdev2->flags)) { | |
6760 | has_journal = true; | |
6761 | break; | |
6762 | } | |
6763 | } | |
230b55fa | 6764 | if (has_journal || mddev->bitmap) { |
f6b6ec5c SL |
6765 | export_rdev(rdev); |
6766 | return -EBUSY; | |
6767 | } | |
bac624f3 | 6768 | set_bit(Journal, &rdev->flags); |
f6b6ec5c | 6769 | } |
1aee41f6 GR |
6770 | /* |
6771 | * check whether the device shows up in other nodes | |
6772 | */ | |
6773 | if (mddev_is_clustered(mddev)) { | |
dbb64f86 | 6774 | if (info->state & (1 << MD_DISK_CANDIDATE)) |
1aee41f6 | 6775 | set_bit(Candidate, &rdev->flags); |
dbb64f86 | 6776 | else if (info->state & (1 << MD_DISK_CLUSTER_ADD)) { |
1aee41f6 | 6777 | /* --add initiated by this node */ |
dbb64f86 | 6778 | err = md_cluster_ops->add_new_disk(mddev, rdev); |
1aee41f6 | 6779 | if (err) { |
1aee41f6 GR |
6780 | export_rdev(rdev); |
6781 | return err; | |
6782 | } | |
6783 | } | |
6784 | } | |
6785 | ||
1da177e4 LT |
6786 | rdev->raid_disk = -1; |
6787 | err = bind_rdev_to_array(rdev, mddev); | |
dbb64f86 | 6788 | |
1da177e4 LT |
6789 | if (err) |
6790 | export_rdev(rdev); | |
dbb64f86 GR |
6791 | |
6792 | if (mddev_is_clustered(mddev)) { | |
e566aef1 GJ |
6793 | if (info->state & (1 << MD_DISK_CANDIDATE)) { |
6794 | if (!err) { | |
6795 | err = md_cluster_ops->new_disk_ack(mddev, | |
6796 | err == 0); | |
6797 | if (err) | |
6798 | md_kick_rdev_from_array(rdev); | |
6799 | } | |
6800 | } else { | |
dbb64f86 GR |
6801 | if (err) |
6802 | md_cluster_ops->add_new_disk_cancel(mddev); | |
6803 | else | |
6804 | err = add_bound_rdev(rdev); | |
6805 | } | |
6806 | ||
6807 | } else if (!err) | |
a6da4ef8 | 6808 | err = add_bound_rdev(rdev); |
dbb64f86 | 6809 | |
1da177e4 LT |
6810 | return err; |
6811 | } | |
6812 | ||
6813 | /* otherwise, add_new_disk is only allowed | |
6814 | * for major_version==0 superblocks | |
6815 | */ | |
6816 | if (mddev->major_version != 0) { | |
9d48739e | 6817 | pr_warn("%s: ADD_NEW_DISK not supported\n", mdname(mddev)); |
1da177e4 LT |
6818 | return -EINVAL; |
6819 | } | |
6820 | ||
6821 | if (!(info->state & (1<<MD_DISK_FAULTY))) { | |
6822 | int err; | |
d710e138 | 6823 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6824 | if (IS_ERR(rdev)) { |
9d48739e | 6825 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6826 | PTR_ERR(rdev)); |
6827 | return PTR_ERR(rdev); | |
6828 | } | |
6829 | rdev->desc_nr = info->number; | |
6830 | if (info->raid_disk < mddev->raid_disks) | |
6831 | rdev->raid_disk = info->raid_disk; | |
6832 | else | |
6833 | rdev->raid_disk = -1; | |
6834 | ||
1da177e4 | 6835 | if (rdev->raid_disk < mddev->raid_disks) |
b2d444d7 N |
6836 | if (info->state & (1<<MD_DISK_SYNC)) |
6837 | set_bit(In_sync, &rdev->flags); | |
1da177e4 | 6838 | |
8ddf9efe N |
6839 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6840 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6841 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6842 | set_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6843 | |
1da177e4 | 6844 | if (!mddev->persistent) { |
9d48739e | 6845 | pr_debug("md: nonpersistent superblock ...\n"); |
77304d2a MS |
6846 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
6847 | } else | |
57b2caa3 | 6848 | rdev->sb_start = calc_dev_sboffset(rdev); |
8190e754 | 6849 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6850 | |
2bf071bf N |
6851 | err = bind_rdev_to_array(rdev, mddev); |
6852 | if (err) { | |
6853 | export_rdev(rdev); | |
6854 | return err; | |
6855 | } | |
1da177e4 LT |
6856 | } |
6857 | ||
6858 | return 0; | |
6859 | } | |
6860 | ||
f72ffdd6 | 6861 | static int hot_remove_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6862 | { |
6863 | char b[BDEVNAME_SIZE]; | |
3cb03002 | 6864 | struct md_rdev *rdev; |
1da177e4 | 6865 | |
c42a0e26 YY |
6866 | if (!mddev->pers) |
6867 | return -ENODEV; | |
6868 | ||
1da177e4 LT |
6869 | rdev = find_rdev(mddev, dev); |
6870 | if (!rdev) | |
6871 | return -ENXIO; | |
6872 | ||
2910ff17 GR |
6873 | if (rdev->raid_disk < 0) |
6874 | goto kick_rdev; | |
293467aa | 6875 | |
3ea8929d N |
6876 | clear_bit(Blocked, &rdev->flags); |
6877 | remove_and_add_spares(mddev, rdev); | |
6878 | ||
1da177e4 LT |
6879 | if (rdev->raid_disk >= 0) |
6880 | goto busy; | |
6881 | ||
2910ff17 | 6882 | kick_rdev: |
54a88392 | 6883 | if (mddev_is_clustered(mddev)) |
88bcfef7 GR |
6884 | md_cluster_ops->remove_disk(mddev, rdev); |
6885 | ||
fb56dfef | 6886 | md_kick_rdev_from_array(rdev); |
2953079c | 6887 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6888 | if (mddev->thread) |
6889 | md_wakeup_thread(mddev->thread); | |
6890 | else | |
6891 | md_update_sb(mddev, 1); | |
d7603b7e | 6892 | md_new_event(mddev); |
1da177e4 LT |
6893 | |
6894 | return 0; | |
6895 | busy: | |
9d48739e N |
6896 | pr_debug("md: cannot remove active disk %s from %s ...\n", |
6897 | bdevname(rdev->bdev,b), mdname(mddev)); | |
1da177e4 LT |
6898 | return -EBUSY; |
6899 | } | |
6900 | ||
f72ffdd6 | 6901 | static int hot_add_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6902 | { |
6903 | char b[BDEVNAME_SIZE]; | |
6904 | int err; | |
3cb03002 | 6905 | struct md_rdev *rdev; |
1da177e4 LT |
6906 | |
6907 | if (!mddev->pers) | |
6908 | return -ENODEV; | |
6909 | ||
6910 | if (mddev->major_version != 0) { | |
9d48739e | 6911 | pr_warn("%s: HOT_ADD may only be used with version-0 superblocks.\n", |
1da177e4 LT |
6912 | mdname(mddev)); |
6913 | return -EINVAL; | |
6914 | } | |
6915 | if (!mddev->pers->hot_add_disk) { | |
9d48739e | 6916 | pr_warn("%s: personality does not support diskops!\n", |
1da177e4 LT |
6917 | mdname(mddev)); |
6918 | return -EINVAL; | |
6919 | } | |
6920 | ||
d710e138 | 6921 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6922 | if (IS_ERR(rdev)) { |
9d48739e | 6923 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6924 | PTR_ERR(rdev)); |
6925 | return -EINVAL; | |
6926 | } | |
6927 | ||
6928 | if (mddev->persistent) | |
57b2caa3 | 6929 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 6930 | else |
77304d2a | 6931 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
1da177e4 | 6932 | |
8190e754 | 6933 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6934 | |
b2d444d7 | 6935 | if (test_bit(Faulty, &rdev->flags)) { |
9d48739e | 6936 | pr_warn("md: can not hot-add faulty %s disk to %s!\n", |
1da177e4 LT |
6937 | bdevname(rdev->bdev,b), mdname(mddev)); |
6938 | err = -EINVAL; | |
6939 | goto abort_export; | |
6940 | } | |
293467aa | 6941 | |
b2d444d7 | 6942 | clear_bit(In_sync, &rdev->flags); |
1da177e4 | 6943 | rdev->desc_nr = -1; |
5842730d | 6944 | rdev->saved_raid_disk = -1; |
2bf071bf N |
6945 | err = bind_rdev_to_array(rdev, mddev); |
6946 | if (err) | |
2aa82191 | 6947 | goto abort_export; |
1da177e4 LT |
6948 | |
6949 | /* | |
6950 | * The rest should better be atomic, we can have disk failures | |
6951 | * noticed in interrupt contexts ... | |
6952 | */ | |
6953 | ||
1da177e4 LT |
6954 | rdev->raid_disk = -1; |
6955 | ||
2953079c | 6956 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6957 | if (!mddev->thread) |
6958 | md_update_sb(mddev, 1); | |
1da177e4 LT |
6959 | /* |
6960 | * Kick recovery, maybe this spare has to be added to the | |
6961 | * array immediately. | |
6962 | */ | |
6963 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6964 | md_wakeup_thread(mddev->thread); | |
d7603b7e | 6965 | md_new_event(mddev); |
1da177e4 LT |
6966 | return 0; |
6967 | ||
1da177e4 LT |
6968 | abort_export: |
6969 | export_rdev(rdev); | |
6970 | return err; | |
6971 | } | |
6972 | ||
fd01b88c | 6973 | static int set_bitmap_file(struct mddev *mddev, int fd) |
32a7627c | 6974 | { |
035328c2 | 6975 | int err = 0; |
32a7627c | 6976 | |
36fa3063 | 6977 | if (mddev->pers) { |
d66b1b39 | 6978 | if (!mddev->pers->quiesce || !mddev->thread) |
36fa3063 N |
6979 | return -EBUSY; |
6980 | if (mddev->recovery || mddev->sync_thread) | |
6981 | return -EBUSY; | |
6982 | /* we should be able to change the bitmap.. */ | |
6983 | } | |
32a7627c | 6984 | |
36fa3063 | 6985 | if (fd >= 0) { |
035328c2 | 6986 | struct inode *inode; |
1e594bb2 N |
6987 | struct file *f; |
6988 | ||
6989 | if (mddev->bitmap || mddev->bitmap_info.file) | |
36fa3063 | 6990 | return -EEXIST; /* cannot add when bitmap is present */ |
1e594bb2 | 6991 | f = fget(fd); |
32a7627c | 6992 | |
1e594bb2 | 6993 | if (f == NULL) { |
9d48739e N |
6994 | pr_warn("%s: error: failed to get bitmap file\n", |
6995 | mdname(mddev)); | |
36fa3063 N |
6996 | return -EBADF; |
6997 | } | |
6998 | ||
1e594bb2 | 6999 | inode = f->f_mapping->host; |
035328c2 | 7000 | if (!S_ISREG(inode->i_mode)) { |
9d48739e N |
7001 | pr_warn("%s: error: bitmap file must be a regular file\n", |
7002 | mdname(mddev)); | |
035328c2 | 7003 | err = -EBADF; |
1e594bb2 | 7004 | } else if (!(f->f_mode & FMODE_WRITE)) { |
9d48739e N |
7005 | pr_warn("%s: error: bitmap file must open for write\n", |
7006 | mdname(mddev)); | |
035328c2 N |
7007 | err = -EBADF; |
7008 | } else if (atomic_read(&inode->i_writecount) != 1) { | |
9d48739e N |
7009 | pr_warn("%s: error: bitmap file is already in use\n", |
7010 | mdname(mddev)); | |
035328c2 N |
7011 | err = -EBUSY; |
7012 | } | |
7013 | if (err) { | |
1e594bb2 | 7014 | fput(f); |
36fa3063 N |
7015 | return err; |
7016 | } | |
1e594bb2 | 7017 | mddev->bitmap_info.file = f; |
c3d9714e | 7018 | mddev->bitmap_info.offset = 0; /* file overrides offset */ |
36fa3063 N |
7019 | } else if (mddev->bitmap == NULL) |
7020 | return -ENOENT; /* cannot remove what isn't there */ | |
7021 | err = 0; | |
7022 | if (mddev->pers) { | |
69e51b44 | 7023 | if (fd >= 0) { |
f9209a32 GR |
7024 | struct bitmap *bitmap; |
7025 | ||
e64e4018 | 7026 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7027 | mddev_suspend(mddev); |
f9209a32 GR |
7028 | if (!IS_ERR(bitmap)) { |
7029 | mddev->bitmap = bitmap; | |
e64e4018 | 7030 | err = md_bitmap_load(mddev); |
ba599aca N |
7031 | } else |
7032 | err = PTR_ERR(bitmap); | |
52a0d49d | 7033 | if (err) { |
e64e4018 | 7034 | md_bitmap_destroy(mddev); |
52a0d49d N |
7035 | fd = -1; |
7036 | } | |
9e1cc0a5 | 7037 | mddev_resume(mddev); |
52a0d49d | 7038 | } else if (fd < 0) { |
9e1cc0a5 | 7039 | mddev_suspend(mddev); |
e64e4018 | 7040 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7041 | mddev_resume(mddev); |
d7375ab3 | 7042 | } |
d7375ab3 N |
7043 | } |
7044 | if (fd < 0) { | |
4af1a041 N |
7045 | struct file *f = mddev->bitmap_info.file; |
7046 | if (f) { | |
7047 | spin_lock(&mddev->lock); | |
7048 | mddev->bitmap_info.file = NULL; | |
7049 | spin_unlock(&mddev->lock); | |
7050 | fput(f); | |
7051 | } | |
36fa3063 N |
7052 | } |
7053 | ||
32a7627c N |
7054 | return err; |
7055 | } | |
7056 | ||
1da177e4 LT |
7057 | /* |
7058 | * set_array_info is used two different ways | |
7059 | * The original usage is when creating a new array. | |
7060 | * In this usage, raid_disks is > 0 and it together with | |
7061 | * level, size, not_persistent,layout,chunksize determine the | |
7062 | * shape of the array. | |
7063 | * This will always create an array with a type-0.90.0 superblock. | |
7064 | * The newer usage is when assembling an array. | |
7065 | * In this case raid_disks will be 0, and the major_version field is | |
7066 | * use to determine which style super-blocks are to be found on the devices. | |
7067 | * The minor and patch _version numbers are also kept incase the | |
7068 | * super_block handler wishes to interpret them. | |
7069 | */ | |
f72ffdd6 | 7070 | static int set_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
7071 | { |
7072 | ||
7073 | if (info->raid_disks == 0) { | |
7074 | /* just setting version number for superblock loading */ | |
7075 | if (info->major_version < 0 || | |
50511da3 | 7076 | info->major_version >= ARRAY_SIZE(super_types) || |
1da177e4 LT |
7077 | super_types[info->major_version].name == NULL) { |
7078 | /* maybe try to auto-load a module? */ | |
9d48739e | 7079 | pr_warn("md: superblock version %d not known\n", |
1da177e4 LT |
7080 | info->major_version); |
7081 | return -EINVAL; | |
7082 | } | |
7083 | mddev->major_version = info->major_version; | |
7084 | mddev->minor_version = info->minor_version; | |
7085 | mddev->patch_version = info->patch_version; | |
3f9d7b0d | 7086 | mddev->persistent = !info->not_persistent; |
cbd19983 N |
7087 | /* ensure mddev_put doesn't delete this now that there |
7088 | * is some minimal configuration. | |
7089 | */ | |
9ebc6ef1 | 7090 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
7091 | return 0; |
7092 | } | |
7093 | mddev->major_version = MD_MAJOR_VERSION; | |
7094 | mddev->minor_version = MD_MINOR_VERSION; | |
7095 | mddev->patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 7096 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
7097 | |
7098 | mddev->level = info->level; | |
17115e03 | 7099 | mddev->clevel[0] = 0; |
58c0fed4 | 7100 | mddev->dev_sectors = 2 * (sector_t)info->size; |
1da177e4 LT |
7101 | mddev->raid_disks = info->raid_disks; |
7102 | /* don't set md_minor, it is determined by which /dev/md* was | |
7103 | * openned | |
7104 | */ | |
7105 | if (info->state & (1<<MD_SB_CLEAN)) | |
7106 | mddev->recovery_cp = MaxSector; | |
7107 | else | |
7108 | mddev->recovery_cp = 0; | |
7109 | mddev->persistent = ! info->not_persistent; | |
e691063a | 7110 | mddev->external = 0; |
1da177e4 LT |
7111 | |
7112 | mddev->layout = info->layout; | |
33f2c35a N |
7113 | if (mddev->level == 0) |
7114 | /* Cannot trust RAID0 layout info here */ | |
7115 | mddev->layout = -1; | |
9d8f0363 | 7116 | mddev->chunk_sectors = info->chunk_size >> 9; |
1da177e4 | 7117 | |
2953079c | 7118 | if (mddev->persistent) { |
1b3bae49 N |
7119 | mddev->max_disks = MD_SB_DISKS; |
7120 | mddev->flags = 0; | |
7121 | mddev->sb_flags = 0; | |
2953079c SL |
7122 | } |
7123 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
1da177e4 | 7124 | |
c3d9714e | 7125 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 7126 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
c3d9714e | 7127 | mddev->bitmap_info.offset = 0; |
b2a2703c | 7128 | |
f6705578 N |
7129 | mddev->reshape_position = MaxSector; |
7130 | ||
1da177e4 LT |
7131 | /* |
7132 | * Generate a 128 bit UUID | |
7133 | */ | |
7134 | get_random_bytes(mddev->uuid, 16); | |
7135 | ||
f6705578 | 7136 | mddev->new_level = mddev->level; |
664e7c41 | 7137 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
7138 | mddev->new_layout = mddev->layout; |
7139 | mddev->delta_disks = 0; | |
2c810cdd | 7140 | mddev->reshape_backwards = 0; |
f6705578 | 7141 | |
1da177e4 LT |
7142 | return 0; |
7143 | } | |
7144 | ||
fd01b88c | 7145 | void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors) |
1f403624 | 7146 | { |
efa4b77b | 7147 | lockdep_assert_held(&mddev->reconfig_mutex); |
b522adcd DW |
7148 | |
7149 | if (mddev->external_size) | |
7150 | return; | |
7151 | ||
1f403624 DW |
7152 | mddev->array_sectors = array_sectors; |
7153 | } | |
7154 | EXPORT_SYMBOL(md_set_array_sectors); | |
7155 | ||
fd01b88c | 7156 | static int update_size(struct mddev *mddev, sector_t num_sectors) |
a35b0d69 | 7157 | { |
3cb03002 | 7158 | struct md_rdev *rdev; |
a35b0d69 | 7159 | int rv; |
d71f9f88 | 7160 | int fit = (num_sectors == 0); |
818da59f | 7161 | sector_t old_dev_sectors = mddev->dev_sectors; |
ab5a98b1 | 7162 | |
a35b0d69 N |
7163 | if (mddev->pers->resize == NULL) |
7164 | return -EINVAL; | |
d71f9f88 AN |
7165 | /* The "num_sectors" is the number of sectors of each device that |
7166 | * is used. This can only make sense for arrays with redundancy. | |
7167 | * linear and raid0 always use whatever space is available. We can only | |
7168 | * consider changing this number if no resync or reconstruction is | |
7169 | * happening, and if the new size is acceptable. It must fit before the | |
0f420358 | 7170 | * sb_start or, if that is <data_offset, it must fit before the size |
d71f9f88 AN |
7171 | * of each device. If num_sectors is zero, we find the largest size |
7172 | * that fits. | |
a35b0d69 | 7173 | */ |
f851b60d N |
7174 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
7175 | mddev->sync_thread) | |
a35b0d69 | 7176 | return -EBUSY; |
bd8839e0 N |
7177 | if (mddev->ro) |
7178 | return -EROFS; | |
a4a6125a | 7179 | |
dafb20fa | 7180 | rdev_for_each(rdev, mddev) { |
dd8ac336 | 7181 | sector_t avail = rdev->sectors; |
01ab5662 | 7182 | |
d71f9f88 AN |
7183 | if (fit && (num_sectors == 0 || num_sectors > avail)) |
7184 | num_sectors = avail; | |
7185 | if (avail < num_sectors) | |
a35b0d69 N |
7186 | return -ENOSPC; |
7187 | } | |
d71f9f88 | 7188 | rv = mddev->pers->resize(mddev, num_sectors); |
c9483634 | 7189 | if (!rv) { |
818da59f GJ |
7190 | if (mddev_is_clustered(mddev)) |
7191 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
7192 | else if (mddev->queue) { | |
c9483634 GJ |
7193 | set_capacity(mddev->gendisk, mddev->array_sectors); |
7194 | revalidate_disk(mddev->gendisk); | |
7195 | } | |
7196 | } | |
a35b0d69 N |
7197 | return rv; |
7198 | } | |
7199 | ||
fd01b88c | 7200 | static int update_raid_disks(struct mddev *mddev, int raid_disks) |
da943b99 N |
7201 | { |
7202 | int rv; | |
c6563a8c | 7203 | struct md_rdev *rdev; |
da943b99 | 7204 | /* change the number of raid disks */ |
63c70c4f | 7205 | if (mddev->pers->check_reshape == NULL) |
da943b99 | 7206 | return -EINVAL; |
bd8839e0 N |
7207 | if (mddev->ro) |
7208 | return -EROFS; | |
da943b99 | 7209 | if (raid_disks <= 0 || |
233fca36 | 7210 | (mddev->max_disks && raid_disks >= mddev->max_disks)) |
da943b99 | 7211 | return -EINVAL; |
f851b60d N |
7212 | if (mddev->sync_thread || |
7213 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || | |
7214 | mddev->reshape_position != MaxSector) | |
da943b99 | 7215 | return -EBUSY; |
c6563a8c N |
7216 | |
7217 | rdev_for_each(rdev, mddev) { | |
7218 | if (mddev->raid_disks < raid_disks && | |
7219 | rdev->data_offset < rdev->new_data_offset) | |
7220 | return -EINVAL; | |
7221 | if (mddev->raid_disks > raid_disks && | |
7222 | rdev->data_offset > rdev->new_data_offset) | |
7223 | return -EINVAL; | |
7224 | } | |
7225 | ||
63c70c4f | 7226 | mddev->delta_disks = raid_disks - mddev->raid_disks; |
2c810cdd N |
7227 | if (mddev->delta_disks < 0) |
7228 | mddev->reshape_backwards = 1; | |
7229 | else if (mddev->delta_disks > 0) | |
7230 | mddev->reshape_backwards = 0; | |
63c70c4f N |
7231 | |
7232 | rv = mddev->pers->check_reshape(mddev); | |
2c810cdd | 7233 | if (rv < 0) { |
de171cb9 | 7234 | mddev->delta_disks = 0; |
2c810cdd N |
7235 | mddev->reshape_backwards = 0; |
7236 | } | |
da943b99 N |
7237 | return rv; |
7238 | } | |
7239 | ||
1da177e4 LT |
7240 | /* |
7241 | * update_array_info is used to change the configuration of an | |
7242 | * on-line array. | |
7243 | * The version, ctime,level,size,raid_disks,not_persistent, layout,chunk_size | |
7244 | * fields in the info are checked against the array. | |
7245 | * Any differences that cannot be handled will cause an error. | |
7246 | * Normally, only one change can be managed at a time. | |
7247 | */ | |
fd01b88c | 7248 | static int update_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
7249 | { |
7250 | int rv = 0; | |
7251 | int cnt = 0; | |
36fa3063 N |
7252 | int state = 0; |
7253 | ||
7254 | /* calculate expected state,ignoring low bits */ | |
c3d9714e | 7255 | if (mddev->bitmap && mddev->bitmap_info.offset) |
36fa3063 | 7256 | state |= (1 << MD_SB_BITMAP_PRESENT); |
1da177e4 LT |
7257 | |
7258 | if (mddev->major_version != info->major_version || | |
7259 | mddev->minor_version != info->minor_version || | |
7260 | /* mddev->patch_version != info->patch_version || */ | |
7261 | mddev->ctime != info->ctime || | |
7262 | mddev->level != info->level || | |
7263 | /* mddev->layout != info->layout || */ | |
4e023612 | 7264 | mddev->persistent != !info->not_persistent || |
9d8f0363 | 7265 | mddev->chunk_sectors != info->chunk_size >> 9 || |
36fa3063 N |
7266 | /* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */ |
7267 | ((state^info->state) & 0xfffffe00) | |
7268 | ) | |
1da177e4 LT |
7269 | return -EINVAL; |
7270 | /* Check there is only one change */ | |
58c0fed4 AN |
7271 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
7272 | cnt++; | |
7273 | if (mddev->raid_disks != info->raid_disks) | |
7274 | cnt++; | |
7275 | if (mddev->layout != info->layout) | |
7276 | cnt++; | |
7277 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) | |
7278 | cnt++; | |
7279 | if (cnt == 0) | |
7280 | return 0; | |
7281 | if (cnt > 1) | |
7282 | return -EINVAL; | |
1da177e4 LT |
7283 | |
7284 | if (mddev->layout != info->layout) { | |
7285 | /* Change layout | |
7286 | * we don't need to do anything at the md level, the | |
7287 | * personality will take care of it all. | |
7288 | */ | |
50ac168a | 7289 | if (mddev->pers->check_reshape == NULL) |
1da177e4 | 7290 | return -EINVAL; |
597a711b N |
7291 | else { |
7292 | mddev->new_layout = info->layout; | |
50ac168a | 7293 | rv = mddev->pers->check_reshape(mddev); |
597a711b N |
7294 | if (rv) |
7295 | mddev->new_layout = mddev->layout; | |
7296 | return rv; | |
7297 | } | |
1da177e4 | 7298 | } |
58c0fed4 | 7299 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
d71f9f88 | 7300 | rv = update_size(mddev, (sector_t)info->size * 2); |
a35b0d69 | 7301 | |
da943b99 N |
7302 | if (mddev->raid_disks != info->raid_disks) |
7303 | rv = update_raid_disks(mddev, info->raid_disks); | |
7304 | ||
36fa3063 | 7305 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) { |
293467aa GR |
7306 | if (mddev->pers->quiesce == NULL || mddev->thread == NULL) { |
7307 | rv = -EINVAL; | |
7308 | goto err; | |
7309 | } | |
7310 | if (mddev->recovery || mddev->sync_thread) { | |
7311 | rv = -EBUSY; | |
7312 | goto err; | |
7313 | } | |
36fa3063 | 7314 | if (info->state & (1<<MD_SB_BITMAP_PRESENT)) { |
f9209a32 | 7315 | struct bitmap *bitmap; |
36fa3063 | 7316 | /* add the bitmap */ |
293467aa GR |
7317 | if (mddev->bitmap) { |
7318 | rv = -EEXIST; | |
7319 | goto err; | |
7320 | } | |
7321 | if (mddev->bitmap_info.default_offset == 0) { | |
7322 | rv = -EINVAL; | |
7323 | goto err; | |
7324 | } | |
c3d9714e N |
7325 | mddev->bitmap_info.offset = |
7326 | mddev->bitmap_info.default_offset; | |
6409bb05 N |
7327 | mddev->bitmap_info.space = |
7328 | mddev->bitmap_info.default_space; | |
e64e4018 | 7329 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7330 | mddev_suspend(mddev); |
f9209a32 GR |
7331 | if (!IS_ERR(bitmap)) { |
7332 | mddev->bitmap = bitmap; | |
e64e4018 | 7333 | rv = md_bitmap_load(mddev); |
ba599aca N |
7334 | } else |
7335 | rv = PTR_ERR(bitmap); | |
36fa3063 | 7336 | if (rv) |
e64e4018 | 7337 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7338 | mddev_resume(mddev); |
36fa3063 N |
7339 | } else { |
7340 | /* remove the bitmap */ | |
293467aa GR |
7341 | if (!mddev->bitmap) { |
7342 | rv = -ENOENT; | |
7343 | goto err; | |
7344 | } | |
7345 | if (mddev->bitmap->storage.file) { | |
7346 | rv = -EINVAL; | |
7347 | goto err; | |
7348 | } | |
f6a2dc64 GJ |
7349 | if (mddev->bitmap_info.nodes) { |
7350 | /* hold PW on all the bitmap lock */ | |
7351 | if (md_cluster_ops->lock_all_bitmaps(mddev) <= 0) { | |
9d48739e | 7352 | pr_warn("md: can't change bitmap to none since the array is in use by more than one node\n"); |
f6a2dc64 GJ |
7353 | rv = -EPERM; |
7354 | md_cluster_ops->unlock_all_bitmaps(mddev); | |
7355 | goto err; | |
7356 | } | |
7357 | ||
7358 | mddev->bitmap_info.nodes = 0; | |
7359 | md_cluster_ops->leave(mddev); | |
7360 | } | |
9e1cc0a5 | 7361 | mddev_suspend(mddev); |
e64e4018 | 7362 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7363 | mddev_resume(mddev); |
c3d9714e | 7364 | mddev->bitmap_info.offset = 0; |
36fa3063 N |
7365 | } |
7366 | } | |
850b2b42 | 7367 | md_update_sb(mddev, 1); |
293467aa GR |
7368 | return rv; |
7369 | err: | |
1da177e4 LT |
7370 | return rv; |
7371 | } | |
7372 | ||
fd01b88c | 7373 | static int set_disk_faulty(struct mddev *mddev, dev_t dev) |
1da177e4 | 7374 | { |
3cb03002 | 7375 | struct md_rdev *rdev; |
1ca69c4b | 7376 | int err = 0; |
1da177e4 LT |
7377 | |
7378 | if (mddev->pers == NULL) | |
7379 | return -ENODEV; | |
7380 | ||
1ca69c4b | 7381 | rcu_read_lock(); |
1532d9e8 | 7382 | rdev = md_find_rdev_rcu(mddev, dev); |
1da177e4 | 7383 | if (!rdev) |
1ca69c4b N |
7384 | err = -ENODEV; |
7385 | else { | |
7386 | md_error(mddev, rdev); | |
7387 | if (!test_bit(Faulty, &rdev->flags)) | |
7388 | err = -EBUSY; | |
7389 | } | |
7390 | rcu_read_unlock(); | |
7391 | return err; | |
1da177e4 LT |
7392 | } |
7393 | ||
2f9618ce AN |
7394 | /* |
7395 | * We have a problem here : there is no easy way to give a CHS | |
7396 | * virtual geometry. We currently pretend that we have a 2 heads | |
7397 | * 4 sectors (with a BIG number of cylinders...). This drives | |
7398 | * dosfs just mad... ;-) | |
7399 | */ | |
a885c8c4 CH |
7400 | static int md_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
7401 | { | |
fd01b88c | 7402 | struct mddev *mddev = bdev->bd_disk->private_data; |
a885c8c4 CH |
7403 | |
7404 | geo->heads = 2; | |
7405 | geo->sectors = 4; | |
49ce6cea | 7406 | geo->cylinders = mddev->array_sectors / 8; |
a885c8c4 CH |
7407 | return 0; |
7408 | } | |
7409 | ||
cb335f88 NS |
7410 | static inline bool md_ioctl_valid(unsigned int cmd) |
7411 | { | |
7412 | switch (cmd) { | |
7413 | case ADD_NEW_DISK: | |
7414 | case BLKROSET: | |
7415 | case GET_ARRAY_INFO: | |
7416 | case GET_BITMAP_FILE: | |
7417 | case GET_DISK_INFO: | |
7418 | case HOT_ADD_DISK: | |
7419 | case HOT_REMOVE_DISK: | |
cb335f88 NS |
7420 | case RAID_VERSION: |
7421 | case RESTART_ARRAY_RW: | |
7422 | case RUN_ARRAY: | |
7423 | case SET_ARRAY_INFO: | |
7424 | case SET_BITMAP_FILE: | |
7425 | case SET_DISK_FAULTY: | |
7426 | case STOP_ARRAY: | |
7427 | case STOP_ARRAY_RO: | |
1aee41f6 | 7428 | case CLUSTERED_DISK_NACK: |
cb335f88 NS |
7429 | return true; |
7430 | default: | |
7431 | return false; | |
7432 | } | |
7433 | } | |
7434 | ||
a39907fa | 7435 | static int md_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
7436 | unsigned int cmd, unsigned long arg) |
7437 | { | |
7438 | int err = 0; | |
7439 | void __user *argp = (void __user *)arg; | |
fd01b88c | 7440 | struct mddev *mddev = NULL; |
e2218350 | 7441 | int ro; |
065e519e | 7442 | bool did_set_md_closing = false; |
1da177e4 | 7443 | |
cb335f88 NS |
7444 | if (!md_ioctl_valid(cmd)) |
7445 | return -ENOTTY; | |
7446 | ||
506c9e44 N |
7447 | switch (cmd) { |
7448 | case RAID_VERSION: | |
7449 | case GET_ARRAY_INFO: | |
7450 | case GET_DISK_INFO: | |
7451 | break; | |
7452 | default: | |
7453 | if (!capable(CAP_SYS_ADMIN)) | |
7454 | return -EACCES; | |
7455 | } | |
1da177e4 LT |
7456 | |
7457 | /* | |
7458 | * Commands dealing with the RAID driver but not any | |
7459 | * particular array: | |
7460 | */ | |
c02c0aeb N |
7461 | switch (cmd) { |
7462 | case RAID_VERSION: | |
7463 | err = get_version(argp); | |
3adc28d8 | 7464 | goto out; |
c02c0aeb | 7465 | default:; |
1da177e4 LT |
7466 | } |
7467 | ||
7468 | /* | |
7469 | * Commands creating/starting a new array: | |
7470 | */ | |
7471 | ||
a39907fa | 7472 | mddev = bdev->bd_disk->private_data; |
1da177e4 LT |
7473 | |
7474 | if (!mddev) { | |
7475 | BUG(); | |
3adc28d8 | 7476 | goto out; |
1da177e4 LT |
7477 | } |
7478 | ||
1ca69c4b N |
7479 | /* Some actions do not requires the mutex */ |
7480 | switch (cmd) { | |
7481 | case GET_ARRAY_INFO: | |
7482 | if (!mddev->raid_disks && !mddev->external) | |
7483 | err = -ENODEV; | |
7484 | else | |
7485 | err = get_array_info(mddev, argp); | |
3adc28d8 | 7486 | goto out; |
1ca69c4b N |
7487 | |
7488 | case GET_DISK_INFO: | |
7489 | if (!mddev->raid_disks && !mddev->external) | |
7490 | err = -ENODEV; | |
7491 | else | |
7492 | err = get_disk_info(mddev, argp); | |
3adc28d8 | 7493 | goto out; |
1ca69c4b N |
7494 | |
7495 | case SET_DISK_FAULTY: | |
7496 | err = set_disk_faulty(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7497 | goto out; |
4af1a041 N |
7498 | |
7499 | case GET_BITMAP_FILE: | |
7500 | err = get_bitmap_file(mddev, argp); | |
7501 | goto out; | |
7502 | ||
1ca69c4b N |
7503 | } |
7504 | ||
78b990cf | 7505 | if (cmd == ADD_NEW_DISK || cmd == HOT_ADD_DISK) |
cc1ffe61 | 7506 | flush_rdev_wq(mddev); |
a7a3f08d | 7507 | |
90f5f7ad HR |
7508 | if (cmd == HOT_REMOVE_DISK) |
7509 | /* need to ensure recovery thread has run */ | |
7510 | wait_event_interruptible_timeout(mddev->sb_wait, | |
7511 | !test_bit(MD_RECOVERY_NEEDED, | |
82a301cb | 7512 | &mddev->recovery), |
90f5f7ad | 7513 | msecs_to_jiffies(5000)); |
260fa034 N |
7514 | if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) { |
7515 | /* Need to flush page cache, and ensure no-one else opens | |
7516 | * and writes | |
7517 | */ | |
7518 | mutex_lock(&mddev->open_mutex); | |
9ba3b7f5 | 7519 | if (mddev->pers && atomic_read(&mddev->openers) > 1) { |
260fa034 N |
7520 | mutex_unlock(&mddev->open_mutex); |
7521 | err = -EBUSY; | |
3adc28d8 | 7522 | goto out; |
260fa034 | 7523 | } |
065e519e | 7524 | WARN_ON_ONCE(test_bit(MD_CLOSING, &mddev->flags)); |
af8d8e6f | 7525 | set_bit(MD_CLOSING, &mddev->flags); |
065e519e | 7526 | did_set_md_closing = true; |
260fa034 N |
7527 | mutex_unlock(&mddev->open_mutex); |
7528 | sync_blockdev(bdev); | |
7529 | } | |
1da177e4 LT |
7530 | err = mddev_lock(mddev); |
7531 | if (err) { | |
9d48739e N |
7532 | pr_debug("md: ioctl lock interrupted, reason %d, cmd %d\n", |
7533 | err, cmd); | |
3adc28d8 | 7534 | goto out; |
1da177e4 LT |
7535 | } |
7536 | ||
c02c0aeb N |
7537 | if (cmd == SET_ARRAY_INFO) { |
7538 | mdu_array_info_t info; | |
7539 | if (!arg) | |
7540 | memset(&info, 0, sizeof(info)); | |
7541 | else if (copy_from_user(&info, argp, sizeof(info))) { | |
7542 | err = -EFAULT; | |
3adc28d8 | 7543 | goto unlock; |
c02c0aeb N |
7544 | } |
7545 | if (mddev->pers) { | |
7546 | err = update_array_info(mddev, &info); | |
7547 | if (err) { | |
9d48739e | 7548 | pr_warn("md: couldn't update array info. %d\n", err); |
3adc28d8 | 7549 | goto unlock; |
1da177e4 | 7550 | } |
3adc28d8 | 7551 | goto unlock; |
c02c0aeb N |
7552 | } |
7553 | if (!list_empty(&mddev->disks)) { | |
9d48739e | 7554 | pr_warn("md: array %s already has disks!\n", mdname(mddev)); |
c02c0aeb | 7555 | err = -EBUSY; |
3adc28d8 | 7556 | goto unlock; |
c02c0aeb N |
7557 | } |
7558 | if (mddev->raid_disks) { | |
9d48739e | 7559 | pr_warn("md: array %s already initialised!\n", mdname(mddev)); |
c02c0aeb | 7560 | err = -EBUSY; |
3adc28d8 | 7561 | goto unlock; |
c02c0aeb N |
7562 | } |
7563 | err = set_array_info(mddev, &info); | |
7564 | if (err) { | |
9d48739e | 7565 | pr_warn("md: couldn't set array info. %d\n", err); |
3adc28d8 | 7566 | goto unlock; |
c02c0aeb | 7567 | } |
3adc28d8 | 7568 | goto unlock; |
1da177e4 LT |
7569 | } |
7570 | ||
7571 | /* | |
7572 | * Commands querying/configuring an existing array: | |
7573 | */ | |
32a7627c | 7574 | /* if we are not initialised yet, only ADD_NEW_DISK, STOP_ARRAY, |
3f9d7b0d | 7575 | * RUN_ARRAY, and GET_ and SET_BITMAP_FILE are allowed */ |
a17184a9 N |
7576 | if ((!mddev->raid_disks && !mddev->external) |
7577 | && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY | |
7578 | && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE | |
7579 | && cmd != GET_BITMAP_FILE) { | |
1da177e4 | 7580 | err = -ENODEV; |
3adc28d8 | 7581 | goto unlock; |
1da177e4 LT |
7582 | } |
7583 | ||
7584 | /* | |
7585 | * Commands even a read-only array can execute: | |
7586 | */ | |
c02c0aeb | 7587 | switch (cmd) { |
c02c0aeb N |
7588 | case RESTART_ARRAY_RW: |
7589 | err = restart_array(mddev); | |
3adc28d8 | 7590 | goto unlock; |
1da177e4 | 7591 | |
c02c0aeb N |
7592 | case STOP_ARRAY: |
7593 | err = do_md_stop(mddev, 0, bdev); | |
3adc28d8 | 7594 | goto unlock; |
1da177e4 | 7595 | |
c02c0aeb N |
7596 | case STOP_ARRAY_RO: |
7597 | err = md_set_readonly(mddev, bdev); | |
3adc28d8 | 7598 | goto unlock; |
1da177e4 | 7599 | |
3ea8929d N |
7600 | case HOT_REMOVE_DISK: |
7601 | err = hot_remove_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7602 | goto unlock; |
3ea8929d | 7603 | |
7ceb17e8 N |
7604 | case ADD_NEW_DISK: |
7605 | /* We can support ADD_NEW_DISK on read-only arrays | |
466ad292 | 7606 | * only if we are re-adding a preexisting device. |
7ceb17e8 N |
7607 | * So require mddev->pers and MD_DISK_SYNC. |
7608 | */ | |
7609 | if (mddev->pers) { | |
7610 | mdu_disk_info_t info; | |
7611 | if (copy_from_user(&info, argp, sizeof(info))) | |
7612 | err = -EFAULT; | |
7613 | else if (!(info.state & (1<<MD_DISK_SYNC))) | |
7614 | /* Need to clear read-only for this */ | |
7615 | break; | |
7616 | else | |
7617 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 7618 | goto unlock; |
7ceb17e8 N |
7619 | } |
7620 | break; | |
7621 | ||
c02c0aeb N |
7622 | case BLKROSET: |
7623 | if (get_user(ro, (int __user *)(arg))) { | |
7624 | err = -EFAULT; | |
3adc28d8 | 7625 | goto unlock; |
c02c0aeb N |
7626 | } |
7627 | err = -EINVAL; | |
e2218350 | 7628 | |
c02c0aeb N |
7629 | /* if the bdev is going readonly the value of mddev->ro |
7630 | * does not matter, no writes are coming | |
7631 | */ | |
7632 | if (ro) | |
3adc28d8 | 7633 | goto unlock; |
e2218350 | 7634 | |
c02c0aeb N |
7635 | /* are we are already prepared for writes? */ |
7636 | if (mddev->ro != 1) | |
3adc28d8 | 7637 | goto unlock; |
e2218350 | 7638 | |
c02c0aeb N |
7639 | /* transitioning to readauto need only happen for |
7640 | * arrays that call md_write_start | |
7641 | */ | |
7642 | if (mddev->pers) { | |
7643 | err = restart_array(mddev); | |
7644 | if (err == 0) { | |
7645 | mddev->ro = 2; | |
7646 | set_disk_ro(mddev->gendisk, 0); | |
e2218350 | 7647 | } |
c02c0aeb | 7648 | } |
3adc28d8 | 7649 | goto unlock; |
1da177e4 LT |
7650 | } |
7651 | ||
7652 | /* | |
7653 | * The remaining ioctls are changing the state of the | |
f91de92e | 7654 | * superblock, so we do not allow them on read-only arrays. |
1da177e4 | 7655 | */ |
326eb17d | 7656 | if (mddev->ro && mddev->pers) { |
f91de92e N |
7657 | if (mddev->ro == 2) { |
7658 | mddev->ro = 0; | |
00bcb4ac | 7659 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 7660 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f3378b48 N |
7661 | /* mddev_unlock will wake thread */ |
7662 | /* If a device failed while we were read-only, we | |
7663 | * need to make sure the metadata is updated now. | |
7664 | */ | |
2953079c | 7665 | if (test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) { |
f3378b48 N |
7666 | mddev_unlock(mddev); |
7667 | wait_event(mddev->sb_wait, | |
2953079c SL |
7668 | !test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags) && |
7669 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); | |
29f097c4 | 7670 | mddev_lock_nointr(mddev); |
f3378b48 | 7671 | } |
f91de92e N |
7672 | } else { |
7673 | err = -EROFS; | |
3adc28d8 | 7674 | goto unlock; |
f91de92e | 7675 | } |
1da177e4 LT |
7676 | } |
7677 | ||
c02c0aeb N |
7678 | switch (cmd) { |
7679 | case ADD_NEW_DISK: | |
1da177e4 | 7680 | { |
c02c0aeb N |
7681 | mdu_disk_info_t info; |
7682 | if (copy_from_user(&info, argp, sizeof(info))) | |
7683 | err = -EFAULT; | |
7684 | else | |
7685 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 7686 | goto unlock; |
c02c0aeb | 7687 | } |
1da177e4 | 7688 | |
1aee41f6 GR |
7689 | case CLUSTERED_DISK_NACK: |
7690 | if (mddev_is_clustered(mddev)) | |
7691 | md_cluster_ops->new_disk_ack(mddev, false); | |
7692 | else | |
7693 | err = -EINVAL; | |
7694 | goto unlock; | |
7695 | ||
c02c0aeb N |
7696 | case HOT_ADD_DISK: |
7697 | err = hot_add_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7698 | goto unlock; |
1da177e4 | 7699 | |
c02c0aeb N |
7700 | case RUN_ARRAY: |
7701 | err = do_md_run(mddev); | |
3adc28d8 | 7702 | goto unlock; |
1da177e4 | 7703 | |
c02c0aeb N |
7704 | case SET_BITMAP_FILE: |
7705 | err = set_bitmap_file(mddev, (int)arg); | |
3adc28d8 | 7706 | goto unlock; |
32a7627c | 7707 | |
c02c0aeb N |
7708 | default: |
7709 | err = -EINVAL; | |
3adc28d8 | 7710 | goto unlock; |
1da177e4 LT |
7711 | } |
7712 | ||
3adc28d8 | 7713 | unlock: |
d3374825 N |
7714 | if (mddev->hold_active == UNTIL_IOCTL && |
7715 | err != -EINVAL) | |
7716 | mddev->hold_active = 0; | |
1da177e4 | 7717 | mddev_unlock(mddev); |
3adc28d8 | 7718 | out: |
065e519e N |
7719 | if(did_set_md_closing) |
7720 | clear_bit(MD_CLOSING, &mddev->flags); | |
1da177e4 LT |
7721 | return err; |
7722 | } | |
aa98aa31 AB |
7723 | #ifdef CONFIG_COMPAT |
7724 | static int md_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
7725 | unsigned int cmd, unsigned long arg) | |
7726 | { | |
7727 | switch (cmd) { | |
7728 | case HOT_REMOVE_DISK: | |
7729 | case HOT_ADD_DISK: | |
7730 | case SET_DISK_FAULTY: | |
7731 | case SET_BITMAP_FILE: | |
7732 | /* These take in integer arg, do not convert */ | |
7733 | break; | |
7734 | default: | |
7735 | arg = (unsigned long)compat_ptr(arg); | |
7736 | break; | |
7737 | } | |
7738 | ||
7739 | return md_ioctl(bdev, mode, cmd, arg); | |
7740 | } | |
7741 | #endif /* CONFIG_COMPAT */ | |
1da177e4 | 7742 | |
a39907fa | 7743 | static int md_open(struct block_device *bdev, fmode_t mode) |
1da177e4 LT |
7744 | { |
7745 | /* | |
7746 | * Succeed if we can lock the mddev, which confirms that | |
7747 | * it isn't being stopped right now. | |
7748 | */ | |
fd01b88c | 7749 | struct mddev *mddev = mddev_find(bdev->bd_dev); |
1da177e4 LT |
7750 | int err; |
7751 | ||
0c098220 YL |
7752 | if (!mddev) |
7753 | return -ENODEV; | |
7754 | ||
d3374825 N |
7755 | if (mddev->gendisk != bdev->bd_disk) { |
7756 | /* we are racing with mddev_put which is discarding this | |
7757 | * bd_disk. | |
7758 | */ | |
7759 | mddev_put(mddev); | |
7760 | /* Wait until bdev->bd_disk is definitely gone */ | |
f6766ff6 GJ |
7761 | if (work_pending(&mddev->del_work)) |
7762 | flush_workqueue(md_misc_wq); | |
d3374825 N |
7763 | /* Then retry the open from the top */ |
7764 | return -ERESTARTSYS; | |
7765 | } | |
7766 | BUG_ON(mddev != bdev->bd_disk->private_data); | |
7767 | ||
c8c00a69 | 7768 | if ((err = mutex_lock_interruptible(&mddev->open_mutex))) |
1da177e4 LT |
7769 | goto out; |
7770 | ||
af8d8e6f GJ |
7771 | if (test_bit(MD_CLOSING, &mddev->flags)) { |
7772 | mutex_unlock(&mddev->open_mutex); | |
e2342ca8 N |
7773 | err = -ENODEV; |
7774 | goto out; | |
af8d8e6f GJ |
7775 | } |
7776 | ||
1da177e4 | 7777 | err = 0; |
f2ea68cf | 7778 | atomic_inc(&mddev->openers); |
c8c00a69 | 7779 | mutex_unlock(&mddev->open_mutex); |
1da177e4 | 7780 | |
f0b4f7e2 | 7781 | check_disk_change(bdev); |
1da177e4 | 7782 | out: |
e2342ca8 N |
7783 | if (err) |
7784 | mddev_put(mddev); | |
1da177e4 LT |
7785 | return err; |
7786 | } | |
7787 | ||
db2a144b | 7788 | static void md_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 7789 | { |
f72ffdd6 | 7790 | struct mddev *mddev = disk->private_data; |
1da177e4 | 7791 | |
52e5f9d1 | 7792 | BUG_ON(!mddev); |
f2ea68cf | 7793 | atomic_dec(&mddev->openers); |
1da177e4 | 7794 | mddev_put(mddev); |
1da177e4 | 7795 | } |
f0b4f7e2 N |
7796 | |
7797 | static int md_media_changed(struct gendisk *disk) | |
7798 | { | |
fd01b88c | 7799 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7800 | |
7801 | return mddev->changed; | |
7802 | } | |
7803 | ||
7804 | static int md_revalidate(struct gendisk *disk) | |
7805 | { | |
fd01b88c | 7806 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7807 | |
7808 | mddev->changed = 0; | |
7809 | return 0; | |
7810 | } | |
83d5cde4 | 7811 | static const struct block_device_operations md_fops = |
1da177e4 LT |
7812 | { |
7813 | .owner = THIS_MODULE, | |
a39907fa AV |
7814 | .open = md_open, |
7815 | .release = md_release, | |
b492b852 | 7816 | .ioctl = md_ioctl, |
aa98aa31 AB |
7817 | #ifdef CONFIG_COMPAT |
7818 | .compat_ioctl = md_compat_ioctl, | |
7819 | #endif | |
a885c8c4 | 7820 | .getgeo = md_getgeo, |
f0b4f7e2 N |
7821 | .media_changed = md_media_changed, |
7822 | .revalidate_disk= md_revalidate, | |
1da177e4 LT |
7823 | }; |
7824 | ||
f72ffdd6 | 7825 | static int md_thread(void *arg) |
1da177e4 | 7826 | { |
2b8bf345 | 7827 | struct md_thread *thread = arg; |
1da177e4 | 7828 | |
1da177e4 LT |
7829 | /* |
7830 | * md_thread is a 'system-thread', it's priority should be very | |
7831 | * high. We avoid resource deadlocks individually in each | |
7832 | * raid personality. (RAID5 does preallocation) We also use RR and | |
7833 | * the very same RT priority as kswapd, thus we will never get | |
7834 | * into a priority inversion deadlock. | |
7835 | * | |
7836 | * we definitely have to have equal or higher priority than | |
7837 | * bdflush, otherwise bdflush will deadlock if there are too | |
7838 | * many dirty RAID5 blocks. | |
7839 | */ | |
1da177e4 | 7840 | |
6985c43f | 7841 | allow_signal(SIGKILL); |
a6fb0934 | 7842 | while (!kthread_should_stop()) { |
1da177e4 | 7843 | |
93588e22 N |
7844 | /* We need to wait INTERRUPTIBLE so that |
7845 | * we don't add to the load-average. | |
7846 | * That means we need to be sure no signals are | |
7847 | * pending | |
7848 | */ | |
7849 | if (signal_pending(current)) | |
7850 | flush_signals(current); | |
7851 | ||
7852 | wait_event_interruptible_timeout | |
7853 | (thread->wqueue, | |
7854 | test_bit(THREAD_WAKEUP, &thread->flags) | |
ce1ccd07 | 7855 | || kthread_should_stop() || kthread_should_park(), |
93588e22 | 7856 | thread->timeout); |
1da177e4 | 7857 | |
6c987910 | 7858 | clear_bit(THREAD_WAKEUP, &thread->flags); |
ce1ccd07 SL |
7859 | if (kthread_should_park()) |
7860 | kthread_parkme(); | |
6c987910 | 7861 | if (!kthread_should_stop()) |
4ed8731d | 7862 | thread->run(thread); |
1da177e4 | 7863 | } |
a6fb0934 | 7864 | |
1da177e4 LT |
7865 | return 0; |
7866 | } | |
7867 | ||
2b8bf345 | 7868 | void md_wakeup_thread(struct md_thread *thread) |
1da177e4 LT |
7869 | { |
7870 | if (thread) { | |
36a4e1fe | 7871 | pr_debug("md: waking up MD thread %s.\n", thread->tsk->comm); |
d1d90147 GJ |
7872 | set_bit(THREAD_WAKEUP, &thread->flags); |
7873 | wake_up(&thread->wqueue); | |
1da177e4 LT |
7874 | } |
7875 | } | |
6c144d31 | 7876 | EXPORT_SYMBOL(md_wakeup_thread); |
1da177e4 | 7877 | |
4ed8731d SL |
7878 | struct md_thread *md_register_thread(void (*run) (struct md_thread *), |
7879 | struct mddev *mddev, const char *name) | |
1da177e4 | 7880 | { |
2b8bf345 | 7881 | struct md_thread *thread; |
1da177e4 | 7882 | |
2b8bf345 | 7883 | thread = kzalloc(sizeof(struct md_thread), GFP_KERNEL); |
1da177e4 LT |
7884 | if (!thread) |
7885 | return NULL; | |
7886 | ||
1da177e4 LT |
7887 | init_waitqueue_head(&thread->wqueue); |
7888 | ||
1da177e4 LT |
7889 | thread->run = run; |
7890 | thread->mddev = mddev; | |
32a7627c | 7891 | thread->timeout = MAX_SCHEDULE_TIMEOUT; |
0da3c619 N |
7892 | thread->tsk = kthread_run(md_thread, thread, |
7893 | "%s_%s", | |
7894 | mdname(thread->mddev), | |
0232605d | 7895 | name); |
a6fb0934 | 7896 | if (IS_ERR(thread->tsk)) { |
1da177e4 LT |
7897 | kfree(thread); |
7898 | return NULL; | |
7899 | } | |
1da177e4 LT |
7900 | return thread; |
7901 | } | |
6c144d31 | 7902 | EXPORT_SYMBOL(md_register_thread); |
1da177e4 | 7903 | |
2b8bf345 | 7904 | void md_unregister_thread(struct md_thread **threadp) |
1da177e4 | 7905 | { |
2b8bf345 | 7906 | struct md_thread *thread = *threadp; |
e0cf8f04 N |
7907 | if (!thread) |
7908 | return; | |
36a4e1fe | 7909 | pr_debug("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk)); |
01f96c0a N |
7910 | /* Locking ensures that mddev_unlock does not wake_up a |
7911 | * non-existent thread | |
7912 | */ | |
7913 | spin_lock(&pers_lock); | |
7914 | *threadp = NULL; | |
7915 | spin_unlock(&pers_lock); | |
a6fb0934 N |
7916 | |
7917 | kthread_stop(thread->tsk); | |
1da177e4 LT |
7918 | kfree(thread); |
7919 | } | |
6c144d31 | 7920 | EXPORT_SYMBOL(md_unregister_thread); |
1da177e4 | 7921 | |
fd01b88c | 7922 | void md_error(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 7923 | { |
b2d444d7 | 7924 | if (!rdev || test_bit(Faulty, &rdev->flags)) |
1da177e4 | 7925 | return; |
6bfe0b49 | 7926 | |
de393cde | 7927 | if (!mddev->pers || !mddev->pers->error_handler) |
1da177e4 LT |
7928 | return; |
7929 | mddev->pers->error_handler(mddev,rdev); | |
72a23c21 NB |
7930 | if (mddev->degraded) |
7931 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
00bcb4ac | 7932 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
7933 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
7934 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7935 | md_wakeup_thread(mddev->thread); | |
768a418d | 7936 | if (mddev->event_work.func) |
e804ac78 | 7937 | queue_work(md_misc_wq, &mddev->event_work); |
bb9ef716 | 7938 | md_new_event(mddev); |
1da177e4 | 7939 | } |
6c144d31 | 7940 | EXPORT_SYMBOL(md_error); |
1da177e4 LT |
7941 | |
7942 | /* seq_file implementation /proc/mdstat */ | |
7943 | ||
7944 | static void status_unused(struct seq_file *seq) | |
7945 | { | |
7946 | int i = 0; | |
3cb03002 | 7947 | struct md_rdev *rdev; |
1da177e4 LT |
7948 | |
7949 | seq_printf(seq, "unused devices: "); | |
7950 | ||
159ec1fc | 7951 | list_for_each_entry(rdev, &pending_raid_disks, same_set) { |
1da177e4 LT |
7952 | char b[BDEVNAME_SIZE]; |
7953 | i++; | |
7954 | seq_printf(seq, "%s ", | |
7955 | bdevname(rdev->bdev,b)); | |
7956 | } | |
7957 | if (!i) | |
7958 | seq_printf(seq, "<none>"); | |
7959 | ||
7960 | seq_printf(seq, "\n"); | |
7961 | } | |
7962 | ||
f7851be7 | 7963 | static int status_resync(struct seq_file *seq, struct mddev *mddev) |
1da177e4 | 7964 | { |
dd71cf6b | 7965 | sector_t max_sectors, resync, res; |
9642fa73 MT |
7966 | unsigned long dt, db = 0; |
7967 | sector_t rt, curr_mark_cnt, resync_mark_cnt; | |
7968 | int scale, recovery_active; | |
4588b42e | 7969 | unsigned int per_milli; |
1da177e4 | 7970 | |
c804cdec N |
7971 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
7972 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
dd71cf6b | 7973 | max_sectors = mddev->resync_max_sectors; |
1da177e4 | 7974 | else |
dd71cf6b | 7975 | max_sectors = mddev->dev_sectors; |
1da177e4 | 7976 | |
f7851be7 N |
7977 | resync = mddev->curr_resync; |
7978 | if (resync <= 3) { | |
7979 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) | |
7980 | /* Still cleaning up */ | |
7981 | resync = max_sectors; | |
d2e2ec82 ND |
7982 | } else if (resync > max_sectors) |
7983 | resync = max_sectors; | |
7984 | else | |
f7851be7 N |
7985 | resync -= atomic_read(&mddev->recovery_active); |
7986 | ||
7987 | if (resync == 0) { | |
0357ba27 GJ |
7988 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery)) { |
7989 | struct md_rdev *rdev; | |
7990 | ||
7991 | rdev_for_each(rdev, mddev) | |
7992 | if (rdev->raid_disk >= 0 && | |
7993 | !test_bit(Faulty, &rdev->flags) && | |
7994 | rdev->recovery_offset != MaxSector && | |
7995 | rdev->recovery_offset) { | |
7996 | seq_printf(seq, "\trecover=REMOTE"); | |
7997 | return 1; | |
7998 | } | |
7999 | if (mddev->reshape_position != MaxSector) | |
8000 | seq_printf(seq, "\treshape=REMOTE"); | |
8001 | else | |
8002 | seq_printf(seq, "\tresync=REMOTE"); | |
8003 | return 1; | |
8004 | } | |
f7851be7 N |
8005 | if (mddev->recovery_cp < MaxSector) { |
8006 | seq_printf(seq, "\tresync=PENDING"); | |
8007 | return 1; | |
8008 | } | |
8009 | return 0; | |
8010 | } | |
8011 | if (resync < 3) { | |
8012 | seq_printf(seq, "\tresync=DELAYED"); | |
8013 | return 1; | |
8014 | } | |
8015 | ||
403df478 | 8016 | WARN_ON(max_sectors == 0); |
4588b42e | 8017 | /* Pick 'scale' such that (resync>>scale)*1000 will fit |
dd71cf6b | 8018 | * in a sector_t, and (max_sectors>>scale) will fit in a |
4588b42e N |
8019 | * u32, as those are the requirements for sector_div. |
8020 | * Thus 'scale' must be at least 10 | |
8021 | */ | |
8022 | scale = 10; | |
8023 | if (sizeof(sector_t) > sizeof(unsigned long)) { | |
dd71cf6b | 8024 | while ( max_sectors/2 > (1ULL<<(scale+32))) |
4588b42e N |
8025 | scale++; |
8026 | } | |
8027 | res = (resync>>scale)*1000; | |
dd71cf6b | 8028 | sector_div(res, (u32)((max_sectors>>scale)+1)); |
4588b42e N |
8029 | |
8030 | per_milli = res; | |
1da177e4 | 8031 | { |
4588b42e | 8032 | int i, x = per_milli/50, y = 20-x; |
1da177e4 LT |
8033 | seq_printf(seq, "["); |
8034 | for (i = 0; i < x; i++) | |
8035 | seq_printf(seq, "="); | |
8036 | seq_printf(seq, ">"); | |
8037 | for (i = 0; i < y; i++) | |
8038 | seq_printf(seq, "."); | |
8039 | seq_printf(seq, "] "); | |
8040 | } | |
4588b42e | 8041 | seq_printf(seq, " %s =%3u.%u%% (%llu/%llu)", |
ccfcc3c1 N |
8042 | (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)? |
8043 | "reshape" : | |
61df9d91 N |
8044 | (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)? |
8045 | "check" : | |
8046 | (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? | |
8047 | "resync" : "recovery"))), | |
8048 | per_milli/10, per_milli % 10, | |
dd71cf6b N |
8049 | (unsigned long long) resync/2, |
8050 | (unsigned long long) max_sectors/2); | |
1da177e4 LT |
8051 | |
8052 | /* | |
1da177e4 LT |
8053 | * dt: time from mark until now |
8054 | * db: blocks written from mark until now | |
8055 | * rt: remaining time | |
dd71cf6b | 8056 | * |
9642fa73 MT |
8057 | * rt is a sector_t, which is always 64bit now. We are keeping |
8058 | * the original algorithm, but it is not really necessary. | |
8059 | * | |
8060 | * Original algorithm: | |
8061 | * So we divide before multiply in case it is 32bit and close | |
8062 | * to the limit. | |
8063 | * We scale the divisor (db) by 32 to avoid losing precision | |
8064 | * near the end of resync when the number of remaining sectors | |
8065 | * is close to 'db'. | |
8066 | * We then divide rt by 32 after multiplying by db to compensate. | |
8067 | * The '+1' avoids division by zero if db is very small. | |
1da177e4 LT |
8068 | */ |
8069 | dt = ((jiffies - mddev->resync_mark) / HZ); | |
8070 | if (!dt) dt++; | |
9642fa73 MT |
8071 | |
8072 | curr_mark_cnt = mddev->curr_mark_cnt; | |
8073 | recovery_active = atomic_read(&mddev->recovery_active); | |
8074 | resync_mark_cnt = mddev->resync_mark_cnt; | |
8075 | ||
8076 | if (curr_mark_cnt >= (recovery_active + resync_mark_cnt)) | |
8077 | db = curr_mark_cnt - (recovery_active + resync_mark_cnt); | |
1da177e4 | 8078 | |
dd71cf6b | 8079 | rt = max_sectors - resync; /* number of remaining sectors */ |
9642fa73 | 8080 | rt = div64_u64(rt, db/32+1); |
dd71cf6b N |
8081 | rt *= dt; |
8082 | rt >>= 5; | |
8083 | ||
8084 | seq_printf(seq, " finish=%lu.%lumin", (unsigned long)rt / 60, | |
8085 | ((unsigned long)rt % 60)/6); | |
1da177e4 | 8086 | |
ff4e8d9a | 8087 | seq_printf(seq, " speed=%ldK/sec", db/2/dt); |
f7851be7 | 8088 | return 1; |
1da177e4 LT |
8089 | } |
8090 | ||
8091 | static void *md_seq_start(struct seq_file *seq, loff_t *pos) | |
8092 | { | |
8093 | struct list_head *tmp; | |
8094 | loff_t l = *pos; | |
fd01b88c | 8095 | struct mddev *mddev; |
1da177e4 LT |
8096 | |
8097 | if (l >= 0x10000) | |
8098 | return NULL; | |
8099 | if (!l--) | |
8100 | /* header */ | |
8101 | return (void*)1; | |
8102 | ||
8103 | spin_lock(&all_mddevs_lock); | |
8104 | list_for_each(tmp,&all_mddevs) | |
8105 | if (!l--) { | |
fd01b88c | 8106 | mddev = list_entry(tmp, struct mddev, all_mddevs); |
1da177e4 LT |
8107 | mddev_get(mddev); |
8108 | spin_unlock(&all_mddevs_lock); | |
8109 | return mddev; | |
8110 | } | |
8111 | spin_unlock(&all_mddevs_lock); | |
8112 | if (!l--) | |
8113 | return (void*)2;/* tail */ | |
8114 | return NULL; | |
8115 | } | |
8116 | ||
8117 | static void *md_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
8118 | { | |
8119 | struct list_head *tmp; | |
fd01b88c | 8120 | struct mddev *next_mddev, *mddev = v; |
f72ffdd6 | 8121 | |
1da177e4 LT |
8122 | ++*pos; |
8123 | if (v == (void*)2) | |
8124 | return NULL; | |
8125 | ||
8126 | spin_lock(&all_mddevs_lock); | |
8127 | if (v == (void*)1) | |
8128 | tmp = all_mddevs.next; | |
8129 | else | |
8130 | tmp = mddev->all_mddevs.next; | |
8131 | if (tmp != &all_mddevs) | |
fd01b88c | 8132 | next_mddev = mddev_get(list_entry(tmp,struct mddev,all_mddevs)); |
1da177e4 LT |
8133 | else { |
8134 | next_mddev = (void*)2; | |
8135 | *pos = 0x10000; | |
f72ffdd6 | 8136 | } |
1da177e4 LT |
8137 | spin_unlock(&all_mddevs_lock); |
8138 | ||
8139 | if (v != (void*)1) | |
8140 | mddev_put(mddev); | |
8141 | return next_mddev; | |
8142 | ||
8143 | } | |
8144 | ||
8145 | static void md_seq_stop(struct seq_file *seq, void *v) | |
8146 | { | |
fd01b88c | 8147 | struct mddev *mddev = v; |
1da177e4 LT |
8148 | |
8149 | if (mddev && v != (void*)1 && v != (void*)2) | |
8150 | mddev_put(mddev); | |
8151 | } | |
8152 | ||
8153 | static int md_seq_show(struct seq_file *seq, void *v) | |
8154 | { | |
fd01b88c | 8155 | struct mddev *mddev = v; |
dd8ac336 | 8156 | sector_t sectors; |
3cb03002 | 8157 | struct md_rdev *rdev; |
1da177e4 LT |
8158 | |
8159 | if (v == (void*)1) { | |
84fc4b56 | 8160 | struct md_personality *pers; |
1da177e4 LT |
8161 | seq_printf(seq, "Personalities : "); |
8162 | spin_lock(&pers_lock); | |
2604b703 N |
8163 | list_for_each_entry(pers, &pers_list, list) |
8164 | seq_printf(seq, "[%s] ", pers->name); | |
1da177e4 LT |
8165 | |
8166 | spin_unlock(&pers_lock); | |
8167 | seq_printf(seq, "\n"); | |
f1514638 | 8168 | seq->poll_event = atomic_read(&md_event_count); |
1da177e4 LT |
8169 | return 0; |
8170 | } | |
8171 | if (v == (void*)2) { | |
8172 | status_unused(seq); | |
8173 | return 0; | |
8174 | } | |
8175 | ||
36d091f4 | 8176 | spin_lock(&mddev->lock); |
1da177e4 LT |
8177 | if (mddev->pers || mddev->raid_disks || !list_empty(&mddev->disks)) { |
8178 | seq_printf(seq, "%s : %sactive", mdname(mddev), | |
8179 | mddev->pers ? "" : "in"); | |
8180 | if (mddev->pers) { | |
f91de92e | 8181 | if (mddev->ro==1) |
1da177e4 | 8182 | seq_printf(seq, " (read-only)"); |
f91de92e | 8183 | if (mddev->ro==2) |
52720ae7 | 8184 | seq_printf(seq, " (auto-read-only)"); |
1da177e4 LT |
8185 | seq_printf(seq, " %s", mddev->pers->name); |
8186 | } | |
8187 | ||
dd8ac336 | 8188 | sectors = 0; |
f97fcad3 N |
8189 | rcu_read_lock(); |
8190 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 LT |
8191 | char b[BDEVNAME_SIZE]; |
8192 | seq_printf(seq, " %s[%d]", | |
8193 | bdevname(rdev->bdev,b), rdev->desc_nr); | |
8ddf9efe N |
8194 | if (test_bit(WriteMostly, &rdev->flags)) |
8195 | seq_printf(seq, "(W)"); | |
9efdca16 SL |
8196 | if (test_bit(Journal, &rdev->flags)) |
8197 | seq_printf(seq, "(J)"); | |
b2d444d7 | 8198 | if (test_bit(Faulty, &rdev->flags)) { |
1da177e4 LT |
8199 | seq_printf(seq, "(F)"); |
8200 | continue; | |
2d78f8c4 N |
8201 | } |
8202 | if (rdev->raid_disk < 0) | |
b325a32e | 8203 | seq_printf(seq, "(S)"); /* spare */ |
2d78f8c4 N |
8204 | if (test_bit(Replacement, &rdev->flags)) |
8205 | seq_printf(seq, "(R)"); | |
dd8ac336 | 8206 | sectors += rdev->sectors; |
1da177e4 | 8207 | } |
f97fcad3 | 8208 | rcu_read_unlock(); |
1da177e4 LT |
8209 | |
8210 | if (!list_empty(&mddev->disks)) { | |
8211 | if (mddev->pers) | |
8212 | seq_printf(seq, "\n %llu blocks", | |
f233ea5c AN |
8213 | (unsigned long long) |
8214 | mddev->array_sectors / 2); | |
1da177e4 LT |
8215 | else |
8216 | seq_printf(seq, "\n %llu blocks", | |
dd8ac336 | 8217 | (unsigned long long)sectors / 2); |
1da177e4 | 8218 | } |
1cd6bf19 N |
8219 | if (mddev->persistent) { |
8220 | if (mddev->major_version != 0 || | |
8221 | mddev->minor_version != 90) { | |
8222 | seq_printf(seq," super %d.%d", | |
8223 | mddev->major_version, | |
8224 | mddev->minor_version); | |
8225 | } | |
e691063a N |
8226 | } else if (mddev->external) |
8227 | seq_printf(seq, " super external:%s", | |
8228 | mddev->metadata_type); | |
8229 | else | |
1cd6bf19 | 8230 | seq_printf(seq, " super non-persistent"); |
1da177e4 LT |
8231 | |
8232 | if (mddev->pers) { | |
d710e138 | 8233 | mddev->pers->status(seq, mddev); |
f72ffdd6 | 8234 | seq_printf(seq, "\n "); |
8e1b39d6 | 8235 | if (mddev->pers->sync_request) { |
f7851be7 | 8236 | if (status_resync(seq, mddev)) |
8e1b39d6 | 8237 | seq_printf(seq, "\n "); |
8e1b39d6 | 8238 | } |
32a7627c N |
8239 | } else |
8240 | seq_printf(seq, "\n "); | |
8241 | ||
e64e4018 | 8242 | md_bitmap_status(seq, mddev->bitmap); |
1da177e4 LT |
8243 | |
8244 | seq_printf(seq, "\n"); | |
8245 | } | |
36d091f4 | 8246 | spin_unlock(&mddev->lock); |
f72ffdd6 | 8247 | |
1da177e4 LT |
8248 | return 0; |
8249 | } | |
8250 | ||
110518bc | 8251 | static const struct seq_operations md_seq_ops = { |
1da177e4 LT |
8252 | .start = md_seq_start, |
8253 | .next = md_seq_next, | |
8254 | .stop = md_seq_stop, | |
8255 | .show = md_seq_show, | |
8256 | }; | |
8257 | ||
8258 | static int md_seq_open(struct inode *inode, struct file *file) | |
8259 | { | |
f1514638 | 8260 | struct seq_file *seq; |
1da177e4 LT |
8261 | int error; |
8262 | ||
8263 | error = seq_open(file, &md_seq_ops); | |
d7603b7e | 8264 | if (error) |
f1514638 KS |
8265 | return error; |
8266 | ||
8267 | seq = file->private_data; | |
8268 | seq->poll_event = atomic_read(&md_event_count); | |
1da177e4 LT |
8269 | return error; |
8270 | } | |
8271 | ||
e2f23b60 | 8272 | static int md_unloading; |
afc9a42b | 8273 | static __poll_t mdstat_poll(struct file *filp, poll_table *wait) |
d7603b7e | 8274 | { |
f1514638 | 8275 | struct seq_file *seq = filp->private_data; |
afc9a42b | 8276 | __poll_t mask; |
d7603b7e | 8277 | |
e2f23b60 | 8278 | if (md_unloading) |
a9a08845 | 8279 | return EPOLLIN|EPOLLRDNORM|EPOLLERR|EPOLLPRI; |
d7603b7e N |
8280 | poll_wait(filp, &md_event_waiters, wait); |
8281 | ||
8282 | /* always allow read */ | |
a9a08845 | 8283 | mask = EPOLLIN | EPOLLRDNORM; |
d7603b7e | 8284 | |
f1514638 | 8285 | if (seq->poll_event != atomic_read(&md_event_count)) |
a9a08845 | 8286 | mask |= EPOLLERR | EPOLLPRI; |
d7603b7e N |
8287 | return mask; |
8288 | } | |
8289 | ||
97a32539 AD |
8290 | static const struct proc_ops mdstat_proc_ops = { |
8291 | .proc_open = md_seq_open, | |
8292 | .proc_read = seq_read, | |
8293 | .proc_lseek = seq_lseek, | |
8294 | .proc_release = seq_release, | |
8295 | .proc_poll = mdstat_poll, | |
1da177e4 LT |
8296 | }; |
8297 | ||
84fc4b56 | 8298 | int register_md_personality(struct md_personality *p) |
1da177e4 | 8299 | { |
9d48739e N |
8300 | pr_debug("md: %s personality registered for level %d\n", |
8301 | p->name, p->level); | |
1da177e4 | 8302 | spin_lock(&pers_lock); |
2604b703 | 8303 | list_add_tail(&p->list, &pers_list); |
1da177e4 LT |
8304 | spin_unlock(&pers_lock); |
8305 | return 0; | |
8306 | } | |
6c144d31 | 8307 | EXPORT_SYMBOL(register_md_personality); |
1da177e4 | 8308 | |
84fc4b56 | 8309 | int unregister_md_personality(struct md_personality *p) |
1da177e4 | 8310 | { |
9d48739e | 8311 | pr_debug("md: %s personality unregistered\n", p->name); |
1da177e4 | 8312 | spin_lock(&pers_lock); |
2604b703 | 8313 | list_del_init(&p->list); |
1da177e4 LT |
8314 | spin_unlock(&pers_lock); |
8315 | return 0; | |
8316 | } | |
6c144d31 | 8317 | EXPORT_SYMBOL(unregister_md_personality); |
1da177e4 | 8318 | |
6022e75b N |
8319 | int register_md_cluster_operations(struct md_cluster_operations *ops, |
8320 | struct module *module) | |
edb39c9d | 8321 | { |
6022e75b | 8322 | int ret = 0; |
edb39c9d | 8323 | spin_lock(&pers_lock); |
6022e75b N |
8324 | if (md_cluster_ops != NULL) |
8325 | ret = -EALREADY; | |
8326 | else { | |
8327 | md_cluster_ops = ops; | |
8328 | md_cluster_mod = module; | |
8329 | } | |
edb39c9d | 8330 | spin_unlock(&pers_lock); |
6022e75b | 8331 | return ret; |
edb39c9d GR |
8332 | } |
8333 | EXPORT_SYMBOL(register_md_cluster_operations); | |
8334 | ||
8335 | int unregister_md_cluster_operations(void) | |
8336 | { | |
8337 | spin_lock(&pers_lock); | |
8338 | md_cluster_ops = NULL; | |
8339 | spin_unlock(&pers_lock); | |
8340 | return 0; | |
8341 | } | |
8342 | EXPORT_SYMBOL(unregister_md_cluster_operations); | |
8343 | ||
8344 | int md_setup_cluster(struct mddev *mddev, int nodes) | |
8345 | { | |
47a7b0d8 GJ |
8346 | if (!md_cluster_ops) |
8347 | request_module("md-cluster"); | |
edb39c9d | 8348 | spin_lock(&pers_lock); |
47a7b0d8 | 8349 | /* ensure module won't be unloaded */ |
edb39c9d | 8350 | if (!md_cluster_ops || !try_module_get(md_cluster_mod)) { |
9d48739e | 8351 | pr_warn("can't find md-cluster module or get it's reference.\n"); |
edb39c9d GR |
8352 | spin_unlock(&pers_lock); |
8353 | return -ENOENT; | |
8354 | } | |
8355 | spin_unlock(&pers_lock); | |
8356 | ||
cf921cc1 | 8357 | return md_cluster_ops->join(mddev, nodes); |
edb39c9d GR |
8358 | } |
8359 | ||
8360 | void md_cluster_stop(struct mddev *mddev) | |
8361 | { | |
c4ce867f GR |
8362 | if (!md_cluster_ops) |
8363 | return; | |
edb39c9d GR |
8364 | md_cluster_ops->leave(mddev); |
8365 | module_put(md_cluster_mod); | |
8366 | } | |
8367 | ||
fd01b88c | 8368 | static int is_mddev_idle(struct mddev *mddev, int init) |
1da177e4 | 8369 | { |
f72ffdd6 | 8370 | struct md_rdev *rdev; |
1da177e4 | 8371 | int idle; |
eea1bf38 | 8372 | int curr_events; |
1da177e4 LT |
8373 | |
8374 | idle = 1; | |
4b80991c N |
8375 | rcu_read_lock(); |
8376 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 8377 | struct gendisk *disk = rdev->bdev->bd_contains->bd_disk; |
59767fbd | 8378 | curr_events = (int)part_stat_read_accum(&disk->part0, sectors) - |
eea1bf38 | 8379 | atomic_read(&disk->sync_io); |
713f6ab1 N |
8380 | /* sync IO will cause sync_io to increase before the disk_stats |
8381 | * as sync_io is counted when a request starts, and | |
8382 | * disk_stats is counted when it completes. | |
8383 | * So resync activity will cause curr_events to be smaller than | |
8384 | * when there was no such activity. | |
8385 | * non-sync IO will cause disk_stat to increase without | |
8386 | * increasing sync_io so curr_events will (eventually) | |
8387 | * be larger than it was before. Once it becomes | |
8388 | * substantially larger, the test below will cause | |
8389 | * the array to appear non-idle, and resync will slow | |
8390 | * down. | |
8391 | * If there is a lot of outstanding resync activity when | |
8392 | * we set last_event to curr_events, then all that activity | |
8393 | * completing might cause the array to appear non-idle | |
8394 | * and resync will be slowed down even though there might | |
8395 | * not have been non-resync activity. This will only | |
8396 | * happen once though. 'last_events' will soon reflect | |
8397 | * the state where there is little or no outstanding | |
8398 | * resync requests, and further resync activity will | |
8399 | * always make curr_events less than last_events. | |
c0e48521 | 8400 | * |
1da177e4 | 8401 | */ |
eea1bf38 | 8402 | if (init || curr_events - rdev->last_events > 64) { |
1da177e4 LT |
8403 | rdev->last_events = curr_events; |
8404 | idle = 0; | |
8405 | } | |
8406 | } | |
4b80991c | 8407 | rcu_read_unlock(); |
1da177e4 LT |
8408 | return idle; |
8409 | } | |
8410 | ||
fd01b88c | 8411 | void md_done_sync(struct mddev *mddev, int blocks, int ok) |
1da177e4 LT |
8412 | { |
8413 | /* another "blocks" (512byte) blocks have been synced */ | |
8414 | atomic_sub(blocks, &mddev->recovery_active); | |
8415 | wake_up(&mddev->recovery_wait); | |
8416 | if (!ok) { | |
dfc70645 | 8417 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
0a19caab | 8418 | set_bit(MD_RECOVERY_ERROR, &mddev->recovery); |
1da177e4 LT |
8419 | md_wakeup_thread(mddev->thread); |
8420 | // stop recovery, signal do_sync .... | |
8421 | } | |
8422 | } | |
6c144d31 | 8423 | EXPORT_SYMBOL(md_done_sync); |
1da177e4 | 8424 | |
06d91a5f N |
8425 | /* md_write_start(mddev, bi) |
8426 | * If we need to update some array metadata (e.g. 'active' flag | |
3d310eb7 N |
8427 | * in superblock) before writing, schedule a superblock update |
8428 | * and wait for it to complete. | |
cc27b0c7 N |
8429 | * A return value of 'false' means that the write wasn't recorded |
8430 | * and cannot proceed as the array is being suspend. | |
06d91a5f | 8431 | */ |
cc27b0c7 | 8432 | bool md_write_start(struct mddev *mddev, struct bio *bi) |
1da177e4 | 8433 | { |
0fd62b86 | 8434 | int did_change = 0; |
4b6c1060 | 8435 | |
06d91a5f | 8436 | if (bio_data_dir(bi) != WRITE) |
cc27b0c7 | 8437 | return true; |
06d91a5f | 8438 | |
f91de92e N |
8439 | BUG_ON(mddev->ro == 1); |
8440 | if (mddev->ro == 2) { | |
8441 | /* need to switch to read/write */ | |
8442 | mddev->ro = 0; | |
8443 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8444 | md_wakeup_thread(mddev->thread); | |
25156198 | 8445 | md_wakeup_thread(mddev->sync_thread); |
0fd62b86 | 8446 | did_change = 1; |
f91de92e | 8447 | } |
4ad23a97 N |
8448 | rcu_read_lock(); |
8449 | percpu_ref_get(&mddev->writes_pending); | |
55cc39f3 | 8450 | smp_mb(); /* Match smp_mb in set_in_sync() */ |
31a59e34 N |
8451 | if (mddev->safemode == 1) |
8452 | mddev->safemode = 0; | |
4ad23a97 | 8453 | /* sync_checkers is always 0 when writes_pending is in per-cpu mode */ |
81fe48e9 | 8454 | if (mddev->in_sync || mddev->sync_checkers) { |
85572d7c | 8455 | spin_lock(&mddev->lock); |
3d310eb7 N |
8456 | if (mddev->in_sync) { |
8457 | mddev->in_sync = 0; | |
2953079c SL |
8458 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8459 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
3d310eb7 | 8460 | md_wakeup_thread(mddev->thread); |
0fd62b86 | 8461 | did_change = 1; |
3d310eb7 | 8462 | } |
85572d7c | 8463 | spin_unlock(&mddev->lock); |
06d91a5f | 8464 | } |
4ad23a97 | 8465 | rcu_read_unlock(); |
0fd62b86 | 8466 | if (did_change) |
00bcb4ac | 8467 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
4b6c1060 HM |
8468 | if (!mddev->has_superblocks) |
8469 | return true; | |
09a44cc1 | 8470 | wait_event(mddev->sb_wait, |
d47c8ad2 N |
8471 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags) || |
8472 | mddev->suspended); | |
cc27b0c7 N |
8473 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) { |
8474 | percpu_ref_put(&mddev->writes_pending); | |
8475 | return false; | |
8476 | } | |
8477 | return true; | |
1da177e4 | 8478 | } |
6c144d31 | 8479 | EXPORT_SYMBOL(md_write_start); |
1da177e4 | 8480 | |
49728050 N |
8481 | /* md_write_inc can only be called when md_write_start() has |
8482 | * already been called at least once of the current request. | |
8483 | * It increments the counter and is useful when a single request | |
8484 | * is split into several parts. Each part causes an increment and | |
8485 | * so needs a matching md_write_end(). | |
8486 | * Unlike md_write_start(), it is safe to call md_write_inc() inside | |
8487 | * a spinlocked region. | |
8488 | */ | |
8489 | void md_write_inc(struct mddev *mddev, struct bio *bi) | |
8490 | { | |
8491 | if (bio_data_dir(bi) != WRITE) | |
8492 | return; | |
8493 | WARN_ON_ONCE(mddev->in_sync || mddev->ro); | |
4ad23a97 | 8494 | percpu_ref_get(&mddev->writes_pending); |
49728050 N |
8495 | } |
8496 | EXPORT_SYMBOL(md_write_inc); | |
8497 | ||
fd01b88c | 8498 | void md_write_end(struct mddev *mddev) |
1da177e4 | 8499 | { |
4ad23a97 N |
8500 | percpu_ref_put(&mddev->writes_pending); |
8501 | ||
8502 | if (mddev->safemode == 2) | |
8503 | md_wakeup_thread(mddev->thread); | |
8504 | else if (mddev->safemode_delay) | |
8505 | /* The roundup() ensures this only performs locking once | |
8506 | * every ->safemode_delay jiffies | |
8507 | */ | |
8508 | mod_timer(&mddev->safemode_timer, | |
8509 | roundup(jiffies, mddev->safemode_delay) + | |
8510 | mddev->safemode_delay); | |
1da177e4 | 8511 | } |
4ad23a97 | 8512 | |
6c144d31 | 8513 | EXPORT_SYMBOL(md_write_end); |
1da177e4 | 8514 | |
2a2275d6 N |
8515 | /* md_allow_write(mddev) |
8516 | * Calling this ensures that the array is marked 'active' so that writes | |
8517 | * may proceed without blocking. It is important to call this before | |
8518 | * attempting a GFP_KERNEL allocation while holding the mddev lock. | |
8519 | * Must be called with mddev_lock held. | |
8520 | */ | |
2214c260 | 8521 | void md_allow_write(struct mddev *mddev) |
2a2275d6 N |
8522 | { |
8523 | if (!mddev->pers) | |
2214c260 | 8524 | return; |
2a2275d6 | 8525 | if (mddev->ro) |
2214c260 | 8526 | return; |
1a0fd497 | 8527 | if (!mddev->pers->sync_request) |
2214c260 | 8528 | return; |
2a2275d6 | 8529 | |
85572d7c | 8530 | spin_lock(&mddev->lock); |
2a2275d6 N |
8531 | if (mddev->in_sync) { |
8532 | mddev->in_sync = 0; | |
2953079c SL |
8533 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8534 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
2a2275d6 N |
8535 | if (mddev->safemode_delay && |
8536 | mddev->safemode == 0) | |
8537 | mddev->safemode = 1; | |
85572d7c | 8538 | spin_unlock(&mddev->lock); |
2a2275d6 | 8539 | md_update_sb(mddev, 0); |
00bcb4ac | 8540 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
2214c260 AP |
8541 | /* wait for the dirty state to be recorded in the metadata */ |
8542 | wait_event(mddev->sb_wait, | |
2214c260 | 8543 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
2a2275d6 | 8544 | } else |
85572d7c | 8545 | spin_unlock(&mddev->lock); |
2a2275d6 N |
8546 | } |
8547 | EXPORT_SYMBOL_GPL(md_allow_write); | |
8548 | ||
1da177e4 LT |
8549 | #define SYNC_MARKS 10 |
8550 | #define SYNC_MARK_STEP (3*HZ) | |
54f89341 | 8551 | #define UPDATE_FREQUENCY (5*60*HZ) |
4ed8731d | 8552 | void md_do_sync(struct md_thread *thread) |
1da177e4 | 8553 | { |
4ed8731d | 8554 | struct mddev *mddev = thread->mddev; |
fd01b88c | 8555 | struct mddev *mddev2; |
e5b521ee | 8556 | unsigned int currspeed = 0, window; |
ac7e50a3 | 8557 | sector_t max_sectors,j, io_sectors, recovery_done; |
1da177e4 | 8558 | unsigned long mark[SYNC_MARKS]; |
54f89341 | 8559 | unsigned long update_time; |
1da177e4 LT |
8560 | sector_t mark_cnt[SYNC_MARKS]; |
8561 | int last_mark,m; | |
8562 | struct list_head *tmp; | |
8563 | sector_t last_check; | |
57afd89f | 8564 | int skipped = 0; |
3cb03002 | 8565 | struct md_rdev *rdev; |
c4a39551 | 8566 | char *desc, *action = NULL; |
7c2c57c9 | 8567 | struct blk_plug plug; |
41a9a0dc | 8568 | int ret; |
1da177e4 LT |
8569 | |
8570 | /* just incase thread restarts... */ | |
d5d885fd SL |
8571 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
8572 | test_bit(MD_RECOVERY_WAIT, &mddev->recovery)) | |
1da177e4 | 8573 | return; |
3991b31e N |
8574 | if (mddev->ro) {/* never try to sync a read-only array */ |
8575 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
5fd6c1dc | 8576 | return; |
3991b31e | 8577 | } |
1da177e4 | 8578 | |
41a9a0dc GJ |
8579 | if (mddev_is_clustered(mddev)) { |
8580 | ret = md_cluster_ops->resync_start(mddev); | |
8581 | if (ret) | |
8582 | goto skip; | |
8583 | ||
bb8bf15b | 8584 | set_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags); |
41a9a0dc GJ |
8585 | if (!(test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8586 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) || | |
8587 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) | |
8588 | && ((unsigned long long)mddev->curr_resync_completed | |
8589 | < (unsigned long long)mddev->resync_max_sectors)) | |
8590 | goto skip; | |
8591 | } | |
8592 | ||
61df9d91 | 8593 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
c4a39551 | 8594 | if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) { |
61df9d91 | 8595 | desc = "data-check"; |
c4a39551 JB |
8596 | action = "check"; |
8597 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
61df9d91 | 8598 | desc = "requested-resync"; |
c4a39551 JB |
8599 | action = "repair"; |
8600 | } else | |
61df9d91 N |
8601 | desc = "resync"; |
8602 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
8603 | desc = "reshape"; | |
8604 | else | |
8605 | desc = "recovery"; | |
8606 | ||
c4a39551 JB |
8607 | mddev->last_sync_action = action ?: desc; |
8608 | ||
1da177e4 LT |
8609 | /* we overload curr_resync somewhat here. |
8610 | * 0 == not engaged in resync at all | |
8611 | * 2 == checking that there is no conflict with another sync | |
8612 | * 1 == like 2, but have yielded to allow conflicting resync to | |
e5b521ee | 8613 | * commence |
1da177e4 LT |
8614 | * other == active in resync - this many blocks |
8615 | * | |
8616 | * Before starting a resync we must have set curr_resync to | |
8617 | * 2, and then checked that every "conflicting" array has curr_resync | |
8618 | * less than ours. When we find one that is the same or higher | |
8619 | * we wait on resync_wait. To avoid deadlock, we reduce curr_resync | |
8620 | * to 1 if we choose to yield (based arbitrarily on address of mddev structure). | |
8621 | * This will mean we have to start checking from the beginning again. | |
8622 | * | |
8623 | */ | |
8624 | ||
8625 | do { | |
c622ca54 | 8626 | int mddev2_minor = -1; |
1da177e4 LT |
8627 | mddev->curr_resync = 2; |
8628 | ||
8629 | try_again: | |
404e4b43 | 8630 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
1da177e4 | 8631 | goto skip; |
29ac4aa3 | 8632 | for_each_mddev(mddev2, tmp) { |
1da177e4 LT |
8633 | if (mddev2 == mddev) |
8634 | continue; | |
90b08710 BS |
8635 | if (!mddev->parallel_resync |
8636 | && mddev2->curr_resync | |
8637 | && match_mddev_units(mddev, mddev2)) { | |
1da177e4 LT |
8638 | DEFINE_WAIT(wq); |
8639 | if (mddev < mddev2 && mddev->curr_resync == 2) { | |
8640 | /* arbitrarily yield */ | |
8641 | mddev->curr_resync = 1; | |
8642 | wake_up(&resync_wait); | |
8643 | } | |
8644 | if (mddev > mddev2 && mddev->curr_resync == 1) | |
8645 | /* no need to wait here, we can wait the next | |
8646 | * time 'round when curr_resync == 2 | |
8647 | */ | |
8648 | continue; | |
9744197c N |
8649 | /* We need to wait 'interruptible' so as not to |
8650 | * contribute to the load average, and not to | |
8651 | * be caught by 'softlockup' | |
8652 | */ | |
8653 | prepare_to_wait(&resync_wait, &wq, TASK_INTERRUPTIBLE); | |
c91abf5a | 8654 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
8712e553 | 8655 | mddev2->curr_resync >= mddev->curr_resync) { |
c622ca54 AP |
8656 | if (mddev2_minor != mddev2->md_minor) { |
8657 | mddev2_minor = mddev2->md_minor; | |
9d48739e N |
8658 | pr_info("md: delaying %s of %s until %s has finished (they share one or more physical units)\n", |
8659 | desc, mdname(mddev), | |
8660 | mdname(mddev2)); | |
c622ca54 | 8661 | } |
1da177e4 | 8662 | mddev_put(mddev2); |
9744197c N |
8663 | if (signal_pending(current)) |
8664 | flush_signals(current); | |
1da177e4 LT |
8665 | schedule(); |
8666 | finish_wait(&resync_wait, &wq); | |
8667 | goto try_again; | |
8668 | } | |
8669 | finish_wait(&resync_wait, &wq); | |
8670 | } | |
8671 | } | |
8672 | } while (mddev->curr_resync < 2); | |
8673 | ||
5fd6c1dc | 8674 | j = 0; |
9d88883e | 8675 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
1da177e4 | 8676 | /* resync follows the size requested by the personality, |
57afd89f | 8677 | * which defaults to physical size, but can be virtual size |
1da177e4 LT |
8678 | */ |
8679 | max_sectors = mddev->resync_max_sectors; | |
7f7583d4 | 8680 | atomic64_set(&mddev->resync_mismatches, 0); |
5fd6c1dc | 8681 | /* we don't use the checkpoint if there's a bitmap */ |
5e96ee65 NB |
8682 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) |
8683 | j = mddev->resync_min; | |
8684 | else if (!mddev->bitmap) | |
5fd6c1dc | 8685 | j = mddev->recovery_cp; |
5e96ee65 | 8686 | |
cb9ee154 | 8687 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) { |
c804cdec | 8688 | max_sectors = mddev->resync_max_sectors; |
cb9ee154 GJ |
8689 | /* |
8690 | * If the original node aborts reshaping then we continue the | |
8691 | * reshaping, so set j again to avoid restart reshape from the | |
8692 | * first beginning | |
8693 | */ | |
8694 | if (mddev_is_clustered(mddev) && | |
8695 | mddev->reshape_position != MaxSector) | |
8696 | j = mddev->reshape_position; | |
8697 | } else { | |
1da177e4 | 8698 | /* recovery follows the physical size of devices */ |
58c0fed4 | 8699 | max_sectors = mddev->dev_sectors; |
5fd6c1dc | 8700 | j = MaxSector; |
4e59ca7d | 8701 | rcu_read_lock(); |
dafb20fa | 8702 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 8703 | if (rdev->raid_disk >= 0 && |
f2076e7d | 8704 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
8705 | !test_bit(Faulty, &rdev->flags) && |
8706 | !test_bit(In_sync, &rdev->flags) && | |
8707 | rdev->recovery_offset < j) | |
8708 | j = rdev->recovery_offset; | |
4e59ca7d | 8709 | rcu_read_unlock(); |
133d4527 N |
8710 | |
8711 | /* If there is a bitmap, we need to make sure all | |
8712 | * writes that started before we added a spare | |
8713 | * complete before we start doing a recovery. | |
8714 | * Otherwise the write might complete and (via | |
8715 | * bitmap_endwrite) set a bit in the bitmap after the | |
8716 | * recovery has checked that bit and skipped that | |
8717 | * region. | |
8718 | */ | |
8719 | if (mddev->bitmap) { | |
8720 | mddev->pers->quiesce(mddev, 1); | |
8721 | mddev->pers->quiesce(mddev, 0); | |
8722 | } | |
5fd6c1dc | 8723 | } |
1da177e4 | 8724 | |
9d48739e N |
8725 | pr_info("md: %s of RAID array %s\n", desc, mdname(mddev)); |
8726 | pr_debug("md: minimum _guaranteed_ speed: %d KB/sec/disk.\n", speed_min(mddev)); | |
8727 | pr_debug("md: using maximum available idle IO bandwidth (but not more than %d KB/sec) for %s.\n", | |
8728 | speed_max(mddev), desc); | |
1da177e4 | 8729 | |
eea1bf38 | 8730 | is_mddev_idle(mddev, 1); /* this initializes IO event counters */ |
5fd6c1dc | 8731 | |
57afd89f | 8732 | io_sectors = 0; |
1da177e4 LT |
8733 | for (m = 0; m < SYNC_MARKS; m++) { |
8734 | mark[m] = jiffies; | |
57afd89f | 8735 | mark_cnt[m] = io_sectors; |
1da177e4 LT |
8736 | } |
8737 | last_mark = 0; | |
8738 | mddev->resync_mark = mark[last_mark]; | |
8739 | mddev->resync_mark_cnt = mark_cnt[last_mark]; | |
8740 | ||
8741 | /* | |
8742 | * Tune reconstruction: | |
8743 | */ | |
e5b521ee | 8744 | window = 32 * (PAGE_SIZE / 512); |
9d48739e N |
8745 | pr_debug("md: using %dk window, over a total of %lluk.\n", |
8746 | window/2, (unsigned long long)max_sectors/2); | |
1da177e4 LT |
8747 | |
8748 | atomic_set(&mddev->recovery_active, 0); | |
1da177e4 LT |
8749 | last_check = 0; |
8750 | ||
8751 | if (j>2) { | |
9d48739e N |
8752 | pr_debug("md: resuming %s of %s from checkpoint.\n", |
8753 | desc, mdname(mddev)); | |
1da177e4 | 8754 | mddev->curr_resync = j; |
72f36d59 N |
8755 | } else |
8756 | mddev->curr_resync = 3; /* no longer delayed */ | |
75d3da43 | 8757 | mddev->curr_resync_completed = j; |
72f36d59 N |
8758 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); |
8759 | md_new_event(mddev); | |
54f89341 | 8760 | update_time = jiffies; |
1da177e4 | 8761 | |
7c2c57c9 | 8762 | blk_start_plug(&plug); |
1da177e4 | 8763 | while (j < max_sectors) { |
57afd89f | 8764 | sector_t sectors; |
1da177e4 | 8765 | |
57afd89f | 8766 | skipped = 0; |
97e4f42d | 8767 | |
7a91ee1f N |
8768 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8769 | ((mddev->curr_resync > mddev->curr_resync_completed && | |
8770 | (mddev->curr_resync - mddev->curr_resync_completed) | |
8771 | > (max_sectors >> 4)) || | |
54f89341 | 8772 | time_after_eq(jiffies, update_time + UPDATE_FREQUENCY) || |
7a91ee1f | 8773 | (j - mddev->curr_resync_completed)*2 |
c5e19d90 N |
8774 | >= mddev->resync_max - mddev->curr_resync_completed || |
8775 | mddev->curr_resync_completed > mddev->resync_max | |
7a91ee1f | 8776 | )) { |
97e4f42d | 8777 | /* time to update curr_resync_completed */ |
97e4f42d N |
8778 | wait_event(mddev->recovery_wait, |
8779 | atomic_read(&mddev->recovery_active) == 0); | |
75d3da43 | 8780 | mddev->curr_resync_completed = j; |
35d78c66 | 8781 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && |
8782 | j > mddev->recovery_cp) | |
8783 | mddev->recovery_cp = j; | |
54f89341 | 8784 | update_time = jiffies; |
2953079c | 8785 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
acb180b0 | 8786 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); |
97e4f42d | 8787 | } |
acb180b0 | 8788 | |
c91abf5a N |
8789 | while (j >= mddev->resync_max && |
8790 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
e62e58a5 N |
8791 | /* As this condition is controlled by user-space, |
8792 | * we can block indefinitely, so use '_interruptible' | |
8793 | * to avoid triggering warnings. | |
8794 | */ | |
8795 | flush_signals(current); /* just in case */ | |
8796 | wait_event_interruptible(mddev->recovery_wait, | |
8797 | mddev->resync_max > j | |
c91abf5a N |
8798 | || test_bit(MD_RECOVERY_INTR, |
8799 | &mddev->recovery)); | |
e62e58a5 | 8800 | } |
acb180b0 | 8801 | |
c91abf5a N |
8802 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8803 | break; | |
acb180b0 | 8804 | |
09314799 | 8805 | sectors = mddev->pers->sync_request(mddev, j, &skipped); |
57afd89f | 8806 | if (sectors == 0) { |
dfc70645 | 8807 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
c91abf5a | 8808 | break; |
1da177e4 | 8809 | } |
57afd89f N |
8810 | |
8811 | if (!skipped) { /* actual IO requested */ | |
8812 | io_sectors += sectors; | |
8813 | atomic_add(sectors, &mddev->recovery_active); | |
8814 | } | |
8815 | ||
e875ecea N |
8816 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8817 | break; | |
8818 | ||
1da177e4 | 8819 | j += sectors; |
5ed1df2e N |
8820 | if (j > max_sectors) |
8821 | /* when skipping, extra large numbers can be returned. */ | |
8822 | j = max_sectors; | |
72f36d59 N |
8823 | if (j > 2) |
8824 | mddev->curr_resync = j; | |
ff4e8d9a | 8825 | mddev->curr_mark_cnt = io_sectors; |
d7603b7e | 8826 | if (last_check == 0) |
e875ecea | 8827 | /* this is the earliest that rebuild will be |
d7603b7e N |
8828 | * visible in /proc/mdstat |
8829 | */ | |
8830 | md_new_event(mddev); | |
57afd89f N |
8831 | |
8832 | if (last_check + window > io_sectors || j == max_sectors) | |
1da177e4 LT |
8833 | continue; |
8834 | ||
57afd89f | 8835 | last_check = io_sectors; |
1da177e4 LT |
8836 | repeat: |
8837 | if (time_after_eq(jiffies, mark[last_mark] + SYNC_MARK_STEP )) { | |
8838 | /* step marks */ | |
8839 | int next = (last_mark+1) % SYNC_MARKS; | |
8840 | ||
8841 | mddev->resync_mark = mark[next]; | |
8842 | mddev->resync_mark_cnt = mark_cnt[next]; | |
8843 | mark[next] = jiffies; | |
57afd89f | 8844 | mark_cnt[next] = io_sectors - atomic_read(&mddev->recovery_active); |
1da177e4 LT |
8845 | last_mark = next; |
8846 | } | |
8847 | ||
c91abf5a N |
8848 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8849 | break; | |
1da177e4 LT |
8850 | |
8851 | /* | |
8852 | * this loop exits only if either when we are slower than | |
8853 | * the 'hard' speed limit, or the system was IO-idle for | |
8854 | * a jiffy. | |
8855 | * the system might be non-idle CPU-wise, but we only care | |
8856 | * about not overloading the IO subsystem. (things like an | |
8857 | * e2fsck being done on the RAID array should execute fast) | |
8858 | */ | |
1da177e4 LT |
8859 | cond_resched(); |
8860 | ||
ac7e50a3 XN |
8861 | recovery_done = io_sectors - atomic_read(&mddev->recovery_active); |
8862 | currspeed = ((unsigned long)(recovery_done - mddev->resync_mark_cnt))/2 | |
57afd89f | 8863 | /((jiffies-mddev->resync_mark)/HZ +1) +1; |
1da177e4 | 8864 | |
88202a0c | 8865 | if (currspeed > speed_min(mddev)) { |
ac8fa419 | 8866 | if (currspeed > speed_max(mddev)) { |
c0e48521 | 8867 | msleep(500); |
1da177e4 LT |
8868 | goto repeat; |
8869 | } | |
ac8fa419 N |
8870 | if (!is_mddev_idle(mddev, 0)) { |
8871 | /* | |
8872 | * Give other IO more of a chance. | |
8873 | * The faster the devices, the less we wait. | |
8874 | */ | |
8875 | wait_event(mddev->recovery_wait, | |
8876 | !atomic_read(&mddev->recovery_active)); | |
8877 | } | |
1da177e4 LT |
8878 | } |
8879 | } | |
9d48739e N |
8880 | pr_info("md: %s: %s %s.\n",mdname(mddev), desc, |
8881 | test_bit(MD_RECOVERY_INTR, &mddev->recovery) | |
8882 | ? "interrupted" : "done"); | |
1da177e4 LT |
8883 | /* |
8884 | * this also signals 'finished resyncing' to md_stop | |
8885 | */ | |
7c2c57c9 | 8886 | blk_finish_plug(&plug); |
1da177e4 LT |
8887 | wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active)); |
8888 | ||
5ed1df2e N |
8889 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8890 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
1217e1d1 | 8891 | mddev->curr_resync > 3) { |
5ed1df2e N |
8892 | mddev->curr_resync_completed = mddev->curr_resync; |
8893 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); | |
8894 | } | |
09314799 | 8895 | mddev->pers->sync_request(mddev, max_sectors, &skipped); |
1da177e4 | 8896 | |
dfc70645 | 8897 | if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) && |
1217e1d1 | 8898 | mddev->curr_resync > 3) { |
5fd6c1dc N |
8899 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
8900 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
8901 | if (mddev->curr_resync >= mddev->recovery_cp) { | |
9d48739e N |
8902 | pr_debug("md: checkpointing %s of %s.\n", |
8903 | desc, mdname(mddev)); | |
0a19caab | 8904 | if (test_bit(MD_RECOVERY_ERROR, |
8905 | &mddev->recovery)) | |
8906 | mddev->recovery_cp = | |
8907 | mddev->curr_resync_completed; | |
8908 | else | |
8909 | mddev->recovery_cp = | |
8910 | mddev->curr_resync; | |
5fd6c1dc N |
8911 | } |
8912 | } else | |
8913 | mddev->recovery_cp = MaxSector; | |
8914 | } else { | |
8915 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) | |
8916 | mddev->curr_resync = MaxSector; | |
db0505d3 N |
8917 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8918 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) { | |
8919 | rcu_read_lock(); | |
8920 | rdev_for_each_rcu(rdev, mddev) | |
8921 | if (rdev->raid_disk >= 0 && | |
8922 | mddev->delta_disks >= 0 && | |
8923 | !test_bit(Journal, &rdev->flags) && | |
8924 | !test_bit(Faulty, &rdev->flags) && | |
8925 | !test_bit(In_sync, &rdev->flags) && | |
8926 | rdev->recovery_offset < mddev->curr_resync) | |
8927 | rdev->recovery_offset = mddev->curr_resync; | |
8928 | rcu_read_unlock(); | |
8929 | } | |
5fd6c1dc | 8930 | } |
1da177e4 | 8931 | } |
db91ff55 | 8932 | skip: |
bb8bf15b GJ |
8933 | /* set CHANGE_PENDING here since maybe another update is needed, |
8934 | * so other nodes are informed. It should be harmless for normal | |
8935 | * raid */ | |
2953079c SL |
8936 | set_mask_bits(&mddev->sb_flags, 0, |
8937 | BIT(MD_SB_CHANGE_PENDING) | BIT(MD_SB_CHANGE_DEVS)); | |
c186b128 | 8938 | |
8876391e BC |
8939 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8940 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
8941 | mddev->delta_disks > 0 && | |
8942 | mddev->pers->finish_reshape && | |
8943 | mddev->pers->size && | |
8944 | mddev->queue) { | |
8945 | mddev_lock_nointr(mddev); | |
8946 | md_set_array_sectors(mddev, mddev->pers->size(mddev, 0, 0)); | |
8947 | mddev_unlock(mddev); | |
aefb2e5f GJ |
8948 | if (!mddev_is_clustered(mddev)) { |
8949 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
8950 | revalidate_disk(mddev->gendisk); | |
8951 | } | |
8876391e BC |
8952 | } |
8953 | ||
23da422b | 8954 | spin_lock(&mddev->lock); |
c07b70ad N |
8955 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { |
8956 | /* We completed so min/max setting can be forgotten if used. */ | |
8957 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
8958 | mddev->resync_min = 0; | |
8959 | mddev->resync_max = MaxSector; | |
8960 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
8961 | mddev->resync_min = mddev->curr_resync_completed; | |
f7851be7 | 8962 | set_bit(MD_RECOVERY_DONE, &mddev->recovery); |
1da177e4 | 8963 | mddev->curr_resync = 0; |
23da422b N |
8964 | spin_unlock(&mddev->lock); |
8965 | ||
1da177e4 | 8966 | wake_up(&resync_wait); |
1da177e4 | 8967 | md_wakeup_thread(mddev->thread); |
c6207277 | 8968 | return; |
1da177e4 | 8969 | } |
29269553 | 8970 | EXPORT_SYMBOL_GPL(md_do_sync); |
1da177e4 | 8971 | |
746d3207 N |
8972 | static int remove_and_add_spares(struct mddev *mddev, |
8973 | struct md_rdev *this) | |
b4c4c7b8 | 8974 | { |
3cb03002 | 8975 | struct md_rdev *rdev; |
b4c4c7b8 | 8976 | int spares = 0; |
f2a371c5 | 8977 | int removed = 0; |
d787be40 | 8978 | bool remove_some = false; |
b4c4c7b8 | 8979 | |
39772f0a N |
8980 | if (this && test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
8981 | /* Mustn't remove devices when resync thread is running */ | |
8982 | return 0; | |
8983 | ||
d787be40 N |
8984 | rdev_for_each(rdev, mddev) { |
8985 | if ((this == NULL || rdev == this) && | |
8986 | rdev->raid_disk >= 0 && | |
8987 | !test_bit(Blocked, &rdev->flags) && | |
8988 | test_bit(Faulty, &rdev->flags) && | |
8989 | atomic_read(&rdev->nr_pending)==0) { | |
8990 | /* Faulty non-Blocked devices with nr_pending == 0 | |
8991 | * never get nr_pending incremented, | |
8992 | * never get Faulty cleared, and never get Blocked set. | |
8993 | * So we can synchronize_rcu now rather than once per device | |
8994 | */ | |
8995 | remove_some = true; | |
8996 | set_bit(RemoveSynchronized, &rdev->flags); | |
8997 | } | |
8998 | } | |
8999 | ||
9000 | if (remove_some) | |
9001 | synchronize_rcu(); | |
9002 | rdev_for_each(rdev, mddev) { | |
746d3207 N |
9003 | if ((this == NULL || rdev == this) && |
9004 | rdev->raid_disk >= 0 && | |
6bfe0b49 | 9005 | !test_bit(Blocked, &rdev->flags) && |
d787be40 | 9006 | ((test_bit(RemoveSynchronized, &rdev->flags) || |
f2076e7d SL |
9007 | (!test_bit(In_sync, &rdev->flags) && |
9008 | !test_bit(Journal, &rdev->flags))) && | |
d787be40 | 9009 | atomic_read(&rdev->nr_pending)==0)) { |
b4c4c7b8 | 9010 | if (mddev->pers->hot_remove_disk( |
b8321b68 | 9011 | mddev, rdev) == 0) { |
36fad858 | 9012 | sysfs_unlink_rdev(mddev, rdev); |
011abdc9 | 9013 | rdev->saved_raid_disk = rdev->raid_disk; |
b4c4c7b8 | 9014 | rdev->raid_disk = -1; |
f2a371c5 | 9015 | removed++; |
b4c4c7b8 N |
9016 | } |
9017 | } | |
d787be40 N |
9018 | if (remove_some && test_bit(RemoveSynchronized, &rdev->flags)) |
9019 | clear_bit(RemoveSynchronized, &rdev->flags); | |
9020 | } | |
9021 | ||
90584fc9 JB |
9022 | if (removed && mddev->kobj.sd) |
9023 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
b4c4c7b8 | 9024 | |
2910ff17 | 9025 | if (this && removed) |
746d3207 N |
9026 | goto no_add; |
9027 | ||
dafb20fa | 9028 | rdev_for_each(rdev, mddev) { |
2910ff17 GR |
9029 | if (this && this != rdev) |
9030 | continue; | |
dbb64f86 GR |
9031 | if (test_bit(Candidate, &rdev->flags)) |
9032 | continue; | |
7bfec5f3 N |
9033 | if (rdev->raid_disk >= 0 && |
9034 | !test_bit(In_sync, &rdev->flags) && | |
f2076e7d | 9035 | !test_bit(Journal, &rdev->flags) && |
7bfec5f3 N |
9036 | !test_bit(Faulty, &rdev->flags)) |
9037 | spares++; | |
7ceb17e8 N |
9038 | if (rdev->raid_disk >= 0) |
9039 | continue; | |
9040 | if (test_bit(Faulty, &rdev->flags)) | |
9041 | continue; | |
f6b6ec5c SL |
9042 | if (!test_bit(Journal, &rdev->flags)) { |
9043 | if (mddev->ro && | |
9044 | ! (rdev->saved_raid_disk >= 0 && | |
9045 | !test_bit(Bitmap_sync, &rdev->flags))) | |
9046 | continue; | |
7ceb17e8 | 9047 | |
f6b6ec5c SL |
9048 | rdev->recovery_offset = 0; |
9049 | } | |
3f79cc22 | 9050 | if (mddev->pers->hot_add_disk(mddev, rdev) == 0) { |
7ceb17e8 N |
9051 | if (sysfs_link_rdev(mddev, rdev)) |
9052 | /* failure here is OK */; | |
f6b6ec5c SL |
9053 | if (!test_bit(Journal, &rdev->flags)) |
9054 | spares++; | |
7ceb17e8 | 9055 | md_new_event(mddev); |
2953079c | 9056 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
dfc70645 | 9057 | } |
b4c4c7b8 | 9058 | } |
746d3207 | 9059 | no_add: |
6dafab6b | 9060 | if (removed) |
2953079c | 9061 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
b4c4c7b8 N |
9062 | return spares; |
9063 | } | |
7ebc0be7 | 9064 | |
ac05f256 N |
9065 | static void md_start_sync(struct work_struct *ws) |
9066 | { | |
9067 | struct mddev *mddev = container_of(ws, struct mddev, del_work); | |
c186b128 | 9068 | |
ac05f256 N |
9069 | mddev->sync_thread = md_register_thread(md_do_sync, |
9070 | mddev, | |
9071 | "resync"); | |
9072 | if (!mddev->sync_thread) { | |
9d48739e N |
9073 | pr_warn("%s: could not start resync thread...\n", |
9074 | mdname(mddev)); | |
ac05f256 N |
9075 | /* leave the spares where they are, it shouldn't hurt */ |
9076 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
9077 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9078 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9079 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
9080 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 9081 | wake_up(&resync_wait); |
ac05f256 N |
9082 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
9083 | &mddev->recovery)) | |
9084 | if (mddev->sysfs_action) | |
9085 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9086 | } else | |
9087 | md_wakeup_thread(mddev->sync_thread); | |
9088 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9089 | md_new_event(mddev); | |
9090 | } | |
9091 | ||
1da177e4 LT |
9092 | /* |
9093 | * This routine is regularly called by all per-raid-array threads to | |
9094 | * deal with generic issues like resync and super-block update. | |
9095 | * Raid personalities that don't have a thread (linear/raid0) do not | |
9096 | * need this as they never do any recovery or update the superblock. | |
9097 | * | |
9098 | * It does not do any resync itself, but rather "forks" off other threads | |
9099 | * to do that as needed. | |
9100 | * When it is determined that resync is needed, we set MD_RECOVERY_RUNNING in | |
9101 | * "->recovery" and create a thread at ->sync_thread. | |
dfc70645 | 9102 | * When the thread finishes it sets MD_RECOVERY_DONE |
1da177e4 LT |
9103 | * and wakeups up this thread which will reap the thread and finish up. |
9104 | * This thread also removes any faulty devices (with nr_pending == 0). | |
9105 | * | |
9106 | * The overall approach is: | |
9107 | * 1/ if the superblock needs updating, update it. | |
9108 | * 2/ If a recovery thread is running, don't do anything else. | |
9109 | * 3/ If recovery has finished, clean up, possibly marking spares active. | |
9110 | * 4/ If there are any faulty devices, remove them. | |
9111 | * 5/ If array is degraded, try to add spares devices | |
9112 | * 6/ If array has spares or is not in-sync, start a resync thread. | |
9113 | */ | |
fd01b88c | 9114 | void md_check_recovery(struct mddev *mddev) |
1da177e4 | 9115 | { |
059421e0 N |
9116 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags) && mddev->sb_flags) { |
9117 | /* Write superblock - thread that called mddev_suspend() | |
9118 | * holds reconfig_mutex for us. | |
9119 | */ | |
9120 | set_bit(MD_UPDATING_SB, &mddev->flags); | |
9121 | smp_mb__after_atomic(); | |
9122 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags)) | |
9123 | md_update_sb(mddev, 0); | |
9124 | clear_bit_unlock(MD_UPDATING_SB, &mddev->flags); | |
9125 | wake_up(&mddev->sb_wait); | |
9126 | } | |
9127 | ||
68866e42 JB |
9128 | if (mddev->suspended) |
9129 | return; | |
9130 | ||
5f40402d | 9131 | if (mddev->bitmap) |
e64e4018 | 9132 | md_bitmap_daemon_work(mddev); |
1da177e4 | 9133 | |
fca4d848 | 9134 | if (signal_pending(current)) { |
31a59e34 | 9135 | if (mddev->pers->sync_request && !mddev->external) { |
9d48739e N |
9136 | pr_debug("md: %s in immediate safe mode\n", |
9137 | mdname(mddev)); | |
fca4d848 N |
9138 | mddev->safemode = 2; |
9139 | } | |
9140 | flush_signals(current); | |
9141 | } | |
9142 | ||
c89a8eee N |
9143 | if (mddev->ro && !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) |
9144 | return; | |
1da177e4 | 9145 | if ( ! ( |
2953079c | 9146 | (mddev->sb_flags & ~ (1<<MD_SB_CHANGE_PENDING)) || |
1da177e4 | 9147 | test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
fca4d848 | 9148 | test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
31a59e34 | 9149 | (mddev->external == 0 && mddev->safemode == 1) || |
4ad23a97 | 9150 | (mddev->safemode == 2 |
fca4d848 | 9151 | && !mddev->in_sync && mddev->recovery_cp == MaxSector) |
1da177e4 LT |
9152 | )) |
9153 | return; | |
fca4d848 | 9154 | |
df5b89b3 | 9155 | if (mddev_trylock(mddev)) { |
b4c4c7b8 | 9156 | int spares = 0; |
480523fe | 9157 | bool try_set_sync = mddev->safemode != 0; |
fca4d848 | 9158 | |
afc1f55c | 9159 | if (!mddev->external && mddev->safemode == 1) |
33182d15 N |
9160 | mddev->safemode = 0; |
9161 | ||
c89a8eee | 9162 | if (mddev->ro) { |
ab16bfc7 NB |
9163 | struct md_rdev *rdev; |
9164 | if (!mddev->external && mddev->in_sync) | |
9165 | /* 'Blocked' flag not needed as failed devices | |
9166 | * will be recorded if array switched to read/write. | |
9167 | * Leaving it set will prevent the device | |
9168 | * from being removed. | |
9169 | */ | |
9170 | rdev_for_each(rdev, mddev) | |
9171 | clear_bit(Blocked, &rdev->flags); | |
7ceb17e8 N |
9172 | /* On a read-only array we can: |
9173 | * - remove failed devices | |
9174 | * - add already-in_sync devices if the array itself | |
9175 | * is in-sync. | |
9176 | * As we only add devices that are already in-sync, | |
9177 | * we can activate the spares immediately. | |
c89a8eee | 9178 | */ |
7ceb17e8 | 9179 | remove_and_add_spares(mddev, NULL); |
8313b8e5 N |
9180 | /* There is no thread, but we need to call |
9181 | * ->spare_active and clear saved_raid_disk | |
9182 | */ | |
2ac295a5 | 9183 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8313b8e5 | 9184 | md_reap_sync_thread(mddev); |
a4a3d26d | 9185 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
8313b8e5 | 9186 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
2953079c | 9187 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
c89a8eee N |
9188 | goto unlock; |
9189 | } | |
9190 | ||
659b254f GJ |
9191 | if (mddev_is_clustered(mddev)) { |
9192 | struct md_rdev *rdev; | |
9193 | /* kick the device if another node issued a | |
9194 | * remove disk. | |
9195 | */ | |
9196 | rdev_for_each(rdev, mddev) { | |
9197 | if (test_and_clear_bit(ClusterRemove, &rdev->flags) && | |
9198 | rdev->raid_disk < 0) | |
9199 | md_kick_rdev_from_array(rdev); | |
9200 | } | |
9201 | } | |
9202 | ||
480523fe | 9203 | if (try_set_sync && !mddev->external && !mddev->in_sync) { |
85572d7c | 9204 | spin_lock(&mddev->lock); |
6497709b | 9205 | set_in_sync(mddev); |
85572d7c | 9206 | spin_unlock(&mddev->lock); |
fca4d848 | 9207 | } |
fca4d848 | 9208 | |
2953079c | 9209 | if (mddev->sb_flags) |
850b2b42 | 9210 | md_update_sb(mddev, 0); |
06d91a5f | 9211 | |
1da177e4 LT |
9212 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
9213 | !test_bit(MD_RECOVERY_DONE, &mddev->recovery)) { | |
9214 | /* resync/recovery still happening */ | |
9215 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9216 | goto unlock; | |
9217 | } | |
9218 | if (mddev->sync_thread) { | |
a91d5ac0 | 9219 | md_reap_sync_thread(mddev); |
1da177e4 LT |
9220 | goto unlock; |
9221 | } | |
72a23c21 NB |
9222 | /* Set RUNNING before clearing NEEDED to avoid |
9223 | * any transients in the value of "sync_action". | |
9224 | */ | |
72f36d59 | 9225 | mddev->curr_resync_completed = 0; |
23da422b | 9226 | spin_lock(&mddev->lock); |
72a23c21 | 9227 | set_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
23da422b | 9228 | spin_unlock(&mddev->lock); |
24dd469d N |
9229 | /* Clear some bits that don't mean anything, but |
9230 | * might be left set | |
9231 | */ | |
24dd469d N |
9232 | clear_bit(MD_RECOVERY_INTR, &mddev->recovery); |
9233 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); | |
1da177e4 | 9234 | |
ed209584 N |
9235 | if (!test_and_clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
9236 | test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) | |
ac05f256 | 9237 | goto not_running; |
1da177e4 LT |
9238 | /* no recovery is running. |
9239 | * remove any failed drives, then | |
9240 | * add spares if possible. | |
72f36d59 | 9241 | * Spares are also removed and re-added, to allow |
1da177e4 LT |
9242 | * the personality to fail the re-add. |
9243 | */ | |
1da177e4 | 9244 | |
b4c4c7b8 | 9245 | if (mddev->reshape_position != MaxSector) { |
50ac168a N |
9246 | if (mddev->pers->check_reshape == NULL || |
9247 | mddev->pers->check_reshape(mddev) != 0) | |
b4c4c7b8 | 9248 | /* Cannot proceed */ |
ac05f256 | 9249 | goto not_running; |
b4c4c7b8 | 9250 | set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); |
72a23c21 | 9251 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
746d3207 | 9252 | } else if ((spares = remove_and_add_spares(mddev, NULL))) { |
24dd469d N |
9253 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9254 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
56ac36d7 | 9255 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
72a23c21 | 9256 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9257 | } else if (mddev->recovery_cp < MaxSector) { |
9258 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
72a23c21 | 9259 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9260 | } else if (!test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) |
9261 | /* nothing to be done ... */ | |
ac05f256 | 9262 | goto not_running; |
24dd469d | 9263 | |
1da177e4 | 9264 | if (mddev->pers->sync_request) { |
ef99bf48 | 9265 | if (spares) { |
a654b9d8 N |
9266 | /* We are adding a device or devices to an array |
9267 | * which has the bitmap stored on all devices. | |
9268 | * So make sure all bitmap pages get written | |
9269 | */ | |
e64e4018 | 9270 | md_bitmap_write_all(mddev->bitmap); |
a654b9d8 | 9271 | } |
ac05f256 N |
9272 | INIT_WORK(&mddev->del_work, md_start_sync); |
9273 | queue_work(md_misc_wq, &mddev->del_work); | |
9274 | goto unlock; | |
1da177e4 | 9275 | } |
ac05f256 | 9276 | not_running: |
72a23c21 NB |
9277 | if (!mddev->sync_thread) { |
9278 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 9279 | wake_up(&resync_wait); |
72a23c21 NB |
9280 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
9281 | &mddev->recovery)) | |
0c3573f1 | 9282 | if (mddev->sysfs_action) |
00bcb4ac | 9283 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
72a23c21 | 9284 | } |
ac05f256 N |
9285 | unlock: |
9286 | wake_up(&mddev->sb_wait); | |
1da177e4 LT |
9287 | mddev_unlock(mddev); |
9288 | } | |
9289 | } | |
6c144d31 | 9290 | EXPORT_SYMBOL(md_check_recovery); |
1da177e4 | 9291 | |
a91d5ac0 JB |
9292 | void md_reap_sync_thread(struct mddev *mddev) |
9293 | { | |
9294 | struct md_rdev *rdev; | |
aefb2e5f GJ |
9295 | sector_t old_dev_sectors = mddev->dev_sectors; |
9296 | bool is_reshaped = false; | |
a91d5ac0 JB |
9297 | |
9298 | /* resync has finished, collect result */ | |
9299 | md_unregister_thread(&mddev->sync_thread); | |
9300 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
0d8ed0e9 GJ |
9301 | !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery) && |
9302 | mddev->degraded != mddev->raid_disks) { | |
a91d5ac0 JB |
9303 | /* success...*/ |
9304 | /* activate any spares */ | |
9305 | if (mddev->pers->spare_active(mddev)) { | |
9306 | sysfs_notify(&mddev->kobj, NULL, | |
9307 | "degraded"); | |
2953079c | 9308 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a91d5ac0 JB |
9309 | } |
9310 | } | |
9311 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
aefb2e5f | 9312 | mddev->pers->finish_reshape) { |
a91d5ac0 | 9313 | mddev->pers->finish_reshape(mddev); |
aefb2e5f GJ |
9314 | if (mddev_is_clustered(mddev)) |
9315 | is_reshaped = true; | |
9316 | } | |
a91d5ac0 JB |
9317 | |
9318 | /* If array is no-longer degraded, then any saved_raid_disk | |
f466722c | 9319 | * information must be scrapped. |
a91d5ac0 | 9320 | */ |
f466722c N |
9321 | if (!mddev->degraded) |
9322 | rdev_for_each(rdev, mddev) | |
a91d5ac0 JB |
9323 | rdev->saved_raid_disk = -1; |
9324 | ||
9325 | md_update_sb(mddev, 1); | |
2953079c | 9326 | /* MD_SB_CHANGE_PENDING should be cleared by md_update_sb, so we can |
bb8bf15b GJ |
9327 | * call resync_finish here if MD_CLUSTER_RESYNC_LOCKED is set by |
9328 | * clustered raid */ | |
9329 | if (test_and_clear_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags)) | |
9330 | md_cluster_ops->resync_finish(mddev); | |
a91d5ac0 | 9331 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
ea358cd0 | 9332 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); |
a91d5ac0 JB |
9333 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9334 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9335 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9336 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
aefb2e5f GJ |
9337 | /* |
9338 | * We call md_cluster_ops->update_size here because sync_size could | |
9339 | * be changed by md_update_sb, and MD_RECOVERY_RESHAPE is cleared, | |
9340 | * so it is time to update size across cluster. | |
9341 | */ | |
9342 | if (mddev_is_clustered(mddev) && is_reshaped | |
9343 | && !test_bit(MD_CLOSING, &mddev->flags)) | |
9344 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
f851b60d | 9345 | wake_up(&resync_wait); |
a91d5ac0 JB |
9346 | /* flag recovery needed just to double check */ |
9347 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9348 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9349 | md_new_event(mddev); | |
9350 | if (mddev->event_work.func) | |
9351 | queue_work(md_misc_wq, &mddev->event_work); | |
9352 | } | |
6c144d31 | 9353 | EXPORT_SYMBOL(md_reap_sync_thread); |
a91d5ac0 | 9354 | |
fd01b88c | 9355 | void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev) |
6bfe0b49 | 9356 | { |
00bcb4ac | 9357 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
6bfe0b49 | 9358 | wait_event_timeout(rdev->blocked_wait, |
de393cde N |
9359 | !test_bit(Blocked, &rdev->flags) && |
9360 | !test_bit(BlockedBadBlocks, &rdev->flags), | |
6bfe0b49 DW |
9361 | msecs_to_jiffies(5000)); |
9362 | rdev_dec_pending(rdev, mddev); | |
9363 | } | |
9364 | EXPORT_SYMBOL(md_wait_for_blocked_rdev); | |
9365 | ||
c6563a8c N |
9366 | void md_finish_reshape(struct mddev *mddev) |
9367 | { | |
9368 | /* called be personality module when reshape completes. */ | |
9369 | struct md_rdev *rdev; | |
9370 | ||
9371 | rdev_for_each(rdev, mddev) { | |
9372 | if (rdev->data_offset > rdev->new_data_offset) | |
9373 | rdev->sectors += rdev->data_offset - rdev->new_data_offset; | |
9374 | else | |
9375 | rdev->sectors -= rdev->new_data_offset - rdev->data_offset; | |
9376 | rdev->data_offset = rdev->new_data_offset; | |
9377 | } | |
9378 | } | |
9379 | EXPORT_SYMBOL(md_finish_reshape); | |
2230dfe4 | 9380 | |
fc974ee2 | 9381 | /* Bad block management */ |
2230dfe4 | 9382 | |
fc974ee2 | 9383 | /* Returns 1 on success, 0 on failure */ |
3cb03002 | 9384 | int rdev_set_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
c6563a8c | 9385 | int is_new) |
2230dfe4 | 9386 | { |
85ad1d13 | 9387 | struct mddev *mddev = rdev->mddev; |
c6563a8c N |
9388 | int rv; |
9389 | if (is_new) | |
9390 | s += rdev->new_data_offset; | |
9391 | else | |
9392 | s += rdev->data_offset; | |
fc974ee2 VV |
9393 | rv = badblocks_set(&rdev->badblocks, s, sectors, 0); |
9394 | if (rv == 0) { | |
2230dfe4 | 9395 | /* Make sure they get written out promptly */ |
35b785f7 TM |
9396 | if (test_bit(ExternalBbl, &rdev->flags)) |
9397 | sysfs_notify(&rdev->kobj, NULL, | |
9398 | "unacknowledged_bad_blocks"); | |
8bd2f0a0 | 9399 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
2953079c SL |
9400 | set_mask_bits(&mddev->sb_flags, 0, |
9401 | BIT(MD_SB_CHANGE_CLEAN) | BIT(MD_SB_CHANGE_PENDING)); | |
2230dfe4 | 9402 | md_wakeup_thread(rdev->mddev->thread); |
fc974ee2 VV |
9403 | return 1; |
9404 | } else | |
9405 | return 0; | |
2230dfe4 N |
9406 | } |
9407 | EXPORT_SYMBOL_GPL(rdev_set_badblocks); | |
9408 | ||
c6563a8c N |
9409 | int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
9410 | int is_new) | |
2230dfe4 | 9411 | { |
35b785f7 | 9412 | int rv; |
c6563a8c N |
9413 | if (is_new) |
9414 | s += rdev->new_data_offset; | |
9415 | else | |
9416 | s += rdev->data_offset; | |
35b785f7 TM |
9417 | rv = badblocks_clear(&rdev->badblocks, s, sectors); |
9418 | if ((rv == 0) && test_bit(ExternalBbl, &rdev->flags)) | |
9419 | sysfs_notify(&rdev->kobj, NULL, "bad_blocks"); | |
9420 | return rv; | |
2230dfe4 N |
9421 | } |
9422 | EXPORT_SYMBOL_GPL(rdev_clear_badblocks); | |
9423 | ||
75c96f85 AB |
9424 | static int md_notify_reboot(struct notifier_block *this, |
9425 | unsigned long code, void *x) | |
1da177e4 LT |
9426 | { |
9427 | struct list_head *tmp; | |
fd01b88c | 9428 | struct mddev *mddev; |
2dba6a91 | 9429 | int need_delay = 0; |
1da177e4 | 9430 | |
c744a65c N |
9431 | for_each_mddev(mddev, tmp) { |
9432 | if (mddev_trylock(mddev)) { | |
30b8aa91 N |
9433 | if (mddev->pers) |
9434 | __md_stop_writes(mddev); | |
0f62fb22 N |
9435 | if (mddev->persistent) |
9436 | mddev->safemode = 2; | |
c744a65c | 9437 | mddev_unlock(mddev); |
2dba6a91 | 9438 | } |
c744a65c | 9439 | need_delay = 1; |
1da177e4 | 9440 | } |
c744a65c N |
9441 | /* |
9442 | * certain more exotic SCSI devices are known to be | |
9443 | * volatile wrt too early system reboots. While the | |
9444 | * right place to handle this issue is the given | |
9445 | * driver, we do want to have a safe RAID driver ... | |
9446 | */ | |
9447 | if (need_delay) | |
9448 | mdelay(1000*1); | |
9449 | ||
1da177e4 LT |
9450 | return NOTIFY_DONE; |
9451 | } | |
9452 | ||
75c96f85 | 9453 | static struct notifier_block md_notifier = { |
1da177e4 LT |
9454 | .notifier_call = md_notify_reboot, |
9455 | .next = NULL, | |
9456 | .priority = INT_MAX, /* before any real devices */ | |
9457 | }; | |
9458 | ||
9459 | static void md_geninit(void) | |
9460 | { | |
36a4e1fe | 9461 | pr_debug("md: sizeof(mdp_super_t) = %d\n", (int)sizeof(mdp_super_t)); |
1da177e4 | 9462 | |
97a32539 | 9463 | proc_create("mdstat", S_IRUGO, NULL, &mdstat_proc_ops); |
1da177e4 LT |
9464 | } |
9465 | ||
75c96f85 | 9466 | static int __init md_init(void) |
1da177e4 | 9467 | { |
e804ac78 TH |
9468 | int ret = -ENOMEM; |
9469 | ||
ada609ee | 9470 | md_wq = alloc_workqueue("md", WQ_MEM_RECLAIM, 0); |
e804ac78 TH |
9471 | if (!md_wq) |
9472 | goto err_wq; | |
9473 | ||
9474 | md_misc_wq = alloc_workqueue("md_misc", 0, 0); | |
9475 | if (!md_misc_wq) | |
9476 | goto err_misc_wq; | |
9477 | ||
cc1ffe61 GJ |
9478 | md_rdev_misc_wq = alloc_workqueue("md_rdev_misc", 0, 0); |
9479 | if (!md_misc_wq) | |
9480 | goto err_rdev_misc_wq; | |
9481 | ||
e804ac78 TH |
9482 | if ((ret = register_blkdev(MD_MAJOR, "md")) < 0) |
9483 | goto err_md; | |
9484 | ||
9485 | if ((ret = register_blkdev(0, "mdp")) < 0) | |
9486 | goto err_mdp; | |
9487 | mdp_major = ret; | |
9488 | ||
af5628f0 | 9489 | blk_register_region(MKDEV(MD_MAJOR, 0), 512, THIS_MODULE, |
e8703fe1 N |
9490 | md_probe, NULL, NULL); |
9491 | blk_register_region(MKDEV(mdp_major, 0), 1UL<<MINORBITS, THIS_MODULE, | |
1da177e4 LT |
9492 | md_probe, NULL, NULL); |
9493 | ||
1da177e4 | 9494 | register_reboot_notifier(&md_notifier); |
0b4d4147 | 9495 | raid_table_header = register_sysctl_table(raid_root_table); |
1da177e4 LT |
9496 | |
9497 | md_geninit(); | |
d710e138 | 9498 | return 0; |
1da177e4 | 9499 | |
e804ac78 TH |
9500 | err_mdp: |
9501 | unregister_blkdev(MD_MAJOR, "md"); | |
9502 | err_md: | |
cc1ffe61 GJ |
9503 | destroy_workqueue(md_rdev_misc_wq); |
9504 | err_rdev_misc_wq: | |
e804ac78 TH |
9505 | destroy_workqueue(md_misc_wq); |
9506 | err_misc_wq: | |
9507 | destroy_workqueue(md_wq); | |
9508 | err_wq: | |
9509 | return ret; | |
9510 | } | |
1da177e4 | 9511 | |
70bcecdb | 9512 | static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev) |
1d7e3e96 | 9513 | { |
70bcecdb GR |
9514 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
9515 | struct md_rdev *rdev2; | |
9516 | int role, ret; | |
9517 | char b[BDEVNAME_SIZE]; | |
1d7e3e96 | 9518 | |
818da59f GJ |
9519 | /* |
9520 | * If size is changed in another node then we need to | |
9521 | * do resize as well. | |
9522 | */ | |
9523 | if (mddev->dev_sectors != le64_to_cpu(sb->size)) { | |
9524 | ret = mddev->pers->resize(mddev, le64_to_cpu(sb->size)); | |
9525 | if (ret) | |
9526 | pr_info("md-cluster: resize failed\n"); | |
9527 | else | |
e64e4018 | 9528 | md_bitmap_update_sb(mddev->bitmap); |
818da59f GJ |
9529 | } |
9530 | ||
70bcecdb GR |
9531 | /* Check for change of roles in the active devices */ |
9532 | rdev_for_each(rdev2, mddev) { | |
9533 | if (test_bit(Faulty, &rdev2->flags)) | |
9534 | continue; | |
9535 | ||
9536 | /* Check if the roles changed */ | |
9537 | role = le16_to_cpu(sb->dev_roles[rdev2->desc_nr]); | |
dbb64f86 GR |
9538 | |
9539 | if (test_bit(Candidate, &rdev2->flags)) { | |
9540 | if (role == 0xfffe) { | |
9541 | pr_info("md: Removing Candidate device %s because add failed\n", bdevname(rdev2->bdev,b)); | |
9542 | md_kick_rdev_from_array(rdev2); | |
9543 | continue; | |
9544 | } | |
9545 | else | |
9546 | clear_bit(Candidate, &rdev2->flags); | |
9547 | } | |
9548 | ||
70bcecdb | 9549 | if (role != rdev2->raid_disk) { |
ca1e98e0 GJ |
9550 | /* |
9551 | * got activated except reshape is happening. | |
9552 | */ | |
9553 | if (rdev2->raid_disk == -1 && role != 0xffff && | |
9554 | !(le32_to_cpu(sb->feature_map) & | |
9555 | MD_FEATURE_RESHAPE_ACTIVE)) { | |
70bcecdb GR |
9556 | rdev2->saved_raid_disk = role; |
9557 | ret = remove_and_add_spares(mddev, rdev2); | |
9558 | pr_info("Activated spare: %s\n", | |
9d48739e | 9559 | bdevname(rdev2->bdev,b)); |
a578183e GJ |
9560 | /* wakeup mddev->thread here, so array could |
9561 | * perform resync with the new activated disk */ | |
9562 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9563 | md_wakeup_thread(mddev->thread); | |
70bcecdb GR |
9564 | } |
9565 | /* device faulty | |
9566 | * We just want to do the minimum to mark the disk | |
9567 | * as faulty. The recovery is performed by the | |
9568 | * one who initiated the error. | |
9569 | */ | |
9570 | if ((role == 0xfffe) || (role == 0xfffd)) { | |
9571 | md_error(mddev, rdev2); | |
9572 | clear_bit(Blocked, &rdev2->flags); | |
9573 | } | |
9574 | } | |
1d7e3e96 | 9575 | } |
70bcecdb | 9576 | |
28c1b9fd GR |
9577 | if (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) |
9578 | update_raid_disks(mddev, le32_to_cpu(sb->raid_disks)); | |
70bcecdb | 9579 | |
7564beda GJ |
9580 | /* |
9581 | * Since mddev->delta_disks has already updated in update_raid_disks, | |
9582 | * so it is time to check reshape. | |
9583 | */ | |
9584 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9585 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9586 | /* | |
9587 | * reshape is happening in the remote node, we need to | |
9588 | * update reshape_position and call start_reshape. | |
9589 | */ | |
ed4d0a4e | 9590 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); |
7564beda GJ |
9591 | if (mddev->pers->update_reshape_pos) |
9592 | mddev->pers->update_reshape_pos(mddev); | |
9593 | if (mddev->pers->start_reshape) | |
9594 | mddev->pers->start_reshape(mddev); | |
9595 | } else if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9596 | mddev->reshape_position != MaxSector && | |
9597 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9598 | /* reshape is just done in another node. */ | |
9599 | mddev->reshape_position = MaxSector; | |
9600 | if (mddev->pers->update_reshape_pos) | |
9601 | mddev->pers->update_reshape_pos(mddev); | |
9602 | } | |
9603 | ||
70bcecdb GR |
9604 | /* Finally set the event to be up to date */ |
9605 | mddev->events = le64_to_cpu(sb->events); | |
9606 | } | |
9607 | ||
9608 | static int read_rdev(struct mddev *mddev, struct md_rdev *rdev) | |
9609 | { | |
9610 | int err; | |
9611 | struct page *swapout = rdev->sb_page; | |
9612 | struct mdp_superblock_1 *sb; | |
9613 | ||
9614 | /* Store the sb page of the rdev in the swapout temporary | |
9615 | * variable in case we err in the future | |
9616 | */ | |
9617 | rdev->sb_page = NULL; | |
7f0f0d87 N |
9618 | err = alloc_disk_sb(rdev); |
9619 | if (err == 0) { | |
9620 | ClearPageUptodate(rdev->sb_page); | |
9621 | rdev->sb_loaded = 0; | |
9622 | err = super_types[mddev->major_version]. | |
9623 | load_super(rdev, NULL, mddev->minor_version); | |
9624 | } | |
70bcecdb GR |
9625 | if (err < 0) { |
9626 | pr_warn("%s: %d Could not reload rdev(%d) err: %d. Restoring old values\n", | |
9627 | __func__, __LINE__, rdev->desc_nr, err); | |
7f0f0d87 N |
9628 | if (rdev->sb_page) |
9629 | put_page(rdev->sb_page); | |
70bcecdb GR |
9630 | rdev->sb_page = swapout; |
9631 | rdev->sb_loaded = 1; | |
9632 | return err; | |
1d7e3e96 GR |
9633 | } |
9634 | ||
70bcecdb GR |
9635 | sb = page_address(rdev->sb_page); |
9636 | /* Read the offset unconditionally, even if MD_FEATURE_RECOVERY_OFFSET | |
9637 | * is not set | |
9638 | */ | |
9639 | ||
9640 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)) | |
9641 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); | |
9642 | ||
9643 | /* The other node finished recovery, call spare_active to set | |
9644 | * device In_sync and mddev->degraded | |
9645 | */ | |
9646 | if (rdev->recovery_offset == MaxSector && | |
9647 | !test_bit(In_sync, &rdev->flags) && | |
9648 | mddev->pers->spare_active(mddev)) | |
9649 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
9650 | ||
9651 | put_page(swapout); | |
9652 | return 0; | |
9653 | } | |
9654 | ||
9655 | void md_reload_sb(struct mddev *mddev, int nr) | |
9656 | { | |
9657 | struct md_rdev *rdev; | |
9658 | int err; | |
9659 | ||
9660 | /* Find the rdev */ | |
9661 | rdev_for_each_rcu(rdev, mddev) { | |
9662 | if (rdev->desc_nr == nr) | |
9663 | break; | |
9664 | } | |
9665 | ||
9666 | if (!rdev || rdev->desc_nr != nr) { | |
9667 | pr_warn("%s: %d Could not find rdev with nr %d\n", __func__, __LINE__, nr); | |
9668 | return; | |
9669 | } | |
9670 | ||
9671 | err = read_rdev(mddev, rdev); | |
9672 | if (err < 0) | |
9673 | return; | |
9674 | ||
9675 | check_sb_changes(mddev, rdev); | |
9676 | ||
9677 | /* Read all rdev's to update recovery_offset */ | |
0ea9924a GJ |
9678 | rdev_for_each_rcu(rdev, mddev) { |
9679 | if (!test_bit(Faulty, &rdev->flags)) | |
9680 | read_rdev(mddev, rdev); | |
9681 | } | |
1d7e3e96 GR |
9682 | } |
9683 | EXPORT_SYMBOL(md_reload_sb); | |
9684 | ||
1da177e4 LT |
9685 | #ifndef MODULE |
9686 | ||
9687 | /* | |
9688 | * Searches all registered partitions for autorun RAID arrays | |
9689 | * at boot time. | |
9690 | */ | |
4d936ec1 | 9691 | |
5b1f5bc3 | 9692 | static DEFINE_MUTEX(detected_devices_mutex); |
4d936ec1 ME |
9693 | static LIST_HEAD(all_detected_devices); |
9694 | struct detected_devices_node { | |
9695 | struct list_head list; | |
9696 | dev_t dev; | |
9697 | }; | |
1da177e4 LT |
9698 | |
9699 | void md_autodetect_dev(dev_t dev) | |
9700 | { | |
4d936ec1 ME |
9701 | struct detected_devices_node *node_detected_dev; |
9702 | ||
9703 | node_detected_dev = kzalloc(sizeof(*node_detected_dev), GFP_KERNEL); | |
9704 | if (node_detected_dev) { | |
9705 | node_detected_dev->dev = dev; | |
5b1f5bc3 | 9706 | mutex_lock(&detected_devices_mutex); |
4d936ec1 | 9707 | list_add_tail(&node_detected_dev->list, &all_detected_devices); |
5b1f5bc3 | 9708 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9709 | } |
1da177e4 LT |
9710 | } |
9711 | ||
d82fa81c | 9712 | void md_autostart_arrays(int part) |
1da177e4 | 9713 | { |
3cb03002 | 9714 | struct md_rdev *rdev; |
4d936ec1 ME |
9715 | struct detected_devices_node *node_detected_dev; |
9716 | dev_t dev; | |
9717 | int i_scanned, i_passed; | |
1da177e4 | 9718 | |
4d936ec1 ME |
9719 | i_scanned = 0; |
9720 | i_passed = 0; | |
1da177e4 | 9721 | |
9d48739e | 9722 | pr_info("md: Autodetecting RAID arrays.\n"); |
1da177e4 | 9723 | |
5b1f5bc3 | 9724 | mutex_lock(&detected_devices_mutex); |
4d936ec1 ME |
9725 | while (!list_empty(&all_detected_devices) && i_scanned < INT_MAX) { |
9726 | i_scanned++; | |
9727 | node_detected_dev = list_entry(all_detected_devices.next, | |
9728 | struct detected_devices_node, list); | |
9729 | list_del(&node_detected_dev->list); | |
9730 | dev = node_detected_dev->dev; | |
9731 | kfree(node_detected_dev); | |
90bcf133 | 9732 | mutex_unlock(&detected_devices_mutex); |
df968c4e | 9733 | rdev = md_import_device(dev,0, 90); |
90bcf133 | 9734 | mutex_lock(&detected_devices_mutex); |
1da177e4 LT |
9735 | if (IS_ERR(rdev)) |
9736 | continue; | |
9737 | ||
403df478 | 9738 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 9739 | continue; |
403df478 | 9740 | |
d0fae18f | 9741 | set_bit(AutoDetected, &rdev->flags); |
1da177e4 | 9742 | list_add(&rdev->same_set, &pending_raid_disks); |
4d936ec1 | 9743 | i_passed++; |
1da177e4 | 9744 | } |
5b1f5bc3 | 9745 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9746 | |
9d48739e | 9747 | pr_debug("md: Scanned %d and added %d devices.\n", i_scanned, i_passed); |
1da177e4 LT |
9748 | |
9749 | autorun_devices(part); | |
9750 | } | |
9751 | ||
fdee8ae4 | 9752 | #endif /* !MODULE */ |
1da177e4 LT |
9753 | |
9754 | static __exit void md_exit(void) | |
9755 | { | |
fd01b88c | 9756 | struct mddev *mddev; |
1da177e4 | 9757 | struct list_head *tmp; |
e2f23b60 | 9758 | int delay = 1; |
8ab5e4c1 | 9759 | |
af5628f0 | 9760 | blk_unregister_region(MKDEV(MD_MAJOR,0), 512); |
e8703fe1 | 9761 | blk_unregister_region(MKDEV(mdp_major,0), 1U << MINORBITS); |
1da177e4 | 9762 | |
3dbd8c2e | 9763 | unregister_blkdev(MD_MAJOR,"md"); |
1da177e4 LT |
9764 | unregister_blkdev(mdp_major, "mdp"); |
9765 | unregister_reboot_notifier(&md_notifier); | |
9766 | unregister_sysctl_table(raid_table_header); | |
e2f23b60 N |
9767 | |
9768 | /* We cannot unload the modules while some process is | |
9769 | * waiting for us in select() or poll() - wake them up | |
9770 | */ | |
9771 | md_unloading = 1; | |
9772 | while (waitqueue_active(&md_event_waiters)) { | |
9773 | /* not safe to leave yet */ | |
9774 | wake_up(&md_event_waiters); | |
9775 | msleep(delay); | |
9776 | delay += delay; | |
9777 | } | |
1da177e4 | 9778 | remove_proc_entry("mdstat", NULL); |
e2f23b60 | 9779 | |
29ac4aa3 | 9780 | for_each_mddev(mddev, tmp) { |
1da177e4 | 9781 | export_array(mddev); |
9356863c | 9782 | mddev->ctime = 0; |
d3374825 | 9783 | mddev->hold_active = 0; |
9356863c N |
9784 | /* |
9785 | * for_each_mddev() will call mddev_put() at the end of each | |
9786 | * iteration. As the mddev is now fully clear, this will | |
9787 | * schedule the mddev for destruction by a workqueue, and the | |
9788 | * destroy_workqueue() below will wait for that to complete. | |
9789 | */ | |
1da177e4 | 9790 | } |
cc1ffe61 | 9791 | destroy_workqueue(md_rdev_misc_wq); |
e804ac78 TH |
9792 | destroy_workqueue(md_misc_wq); |
9793 | destroy_workqueue(md_wq); | |
1da177e4 LT |
9794 | } |
9795 | ||
685784aa | 9796 | subsys_initcall(md_init); |
1da177e4 LT |
9797 | module_exit(md_exit) |
9798 | ||
e4dca7b7 | 9799 | static int get_ro(char *buffer, const struct kernel_param *kp) |
f91de92e | 9800 | { |
3f99980c | 9801 | return sprintf(buffer, "%d\n", start_readonly); |
f91de92e | 9802 | } |
e4dca7b7 | 9803 | static int set_ro(const char *val, const struct kernel_param *kp) |
f91de92e | 9804 | { |
4c9309c0 | 9805 | return kstrtouint(val, 10, (unsigned int *)&start_readonly); |
f91de92e N |
9806 | } |
9807 | ||
80ca3a44 N |
9808 | module_param_call(start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR); |
9809 | module_param(start_dirty_degraded, int, S_IRUGO|S_IWUSR); | |
efeb53c0 | 9810 | module_param_call(new_array, add_named_array, NULL, NULL, S_IWUSR); |
78b6350d | 9811 | module_param(create_on_open, bool, S_IRUSR|S_IWUSR); |
f91de92e | 9812 | |
1da177e4 | 9813 | MODULE_LICENSE("GPL"); |
0efb9e61 | 9814 | MODULE_DESCRIPTION("MD RAID framework"); |
aa1595e9 | 9815 | MODULE_ALIAS("md"); |
72008652 | 9816 | MODULE_ALIAS_BLOCKDEV_MAJOR(MD_MAJOR); |