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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 | |
7c9d5c54 ZH |
100 | /* Default safemode delay: 200 msec */ |
101 | #define DEFAULT_SAFEMODE_DELAY ((200 * HZ)/1000 +1) | |
1da177e4 LT |
102 | /* |
103 | * Current RAID-1,4,5 parallel reconstruction 'guaranteed speed limit' | |
104 | * is 1000 KB/sec, so the extra system load does not show up that much. | |
105 | * Increase it if you want to have more _guaranteed_ speed. Note that | |
338cec32 | 106 | * the RAID driver will use the maximum available bandwidth if the IO |
1da177e4 LT |
107 | * subsystem is idle. There is also an 'absolute maximum' reconstruction |
108 | * speed limit - in case reconstruction slows down your system despite | |
109 | * idle IO detection. | |
110 | * | |
111 | * you can change it via /proc/sys/dev/raid/speed_limit_min and _max. | |
88202a0c | 112 | * or /sys/block/mdX/md/sync_speed_{min,max} |
1da177e4 LT |
113 | */ |
114 | ||
115 | static int sysctl_speed_limit_min = 1000; | |
116 | static int sysctl_speed_limit_max = 200000; | |
fd01b88c | 117 | static inline int speed_min(struct mddev *mddev) |
88202a0c N |
118 | { |
119 | return mddev->sync_speed_min ? | |
120 | mddev->sync_speed_min : sysctl_speed_limit_min; | |
121 | } | |
122 | ||
fd01b88c | 123 | static inline int speed_max(struct mddev *mddev) |
88202a0c N |
124 | { |
125 | return mddev->sync_speed_max ? | |
126 | mddev->sync_speed_max : sysctl_speed_limit_max; | |
127 | } | |
1da177e4 | 128 | |
69b00b5b GJ |
129 | static void rdev_uninit_serial(struct md_rdev *rdev) |
130 | { | |
131 | if (!test_and_clear_bit(CollisionCheck, &rdev->flags)) | |
132 | return; | |
133 | ||
025471f9 | 134 | kvfree(rdev->serial); |
69b00b5b GJ |
135 | rdev->serial = NULL; |
136 | } | |
137 | ||
138 | static void rdevs_uninit_serial(struct mddev *mddev) | |
139 | { | |
140 | struct md_rdev *rdev; | |
141 | ||
142 | rdev_for_each(rdev, mddev) | |
143 | rdev_uninit_serial(rdev); | |
144 | } | |
145 | ||
404659cf | 146 | static int rdev_init_serial(struct md_rdev *rdev) |
3e148a32 | 147 | { |
025471f9 GJ |
148 | /* serial_nums equals with BARRIER_BUCKETS_NR */ |
149 | int i, serial_nums = 1 << ((PAGE_SHIFT - ilog2(sizeof(atomic_t)))); | |
69b00b5b GJ |
150 | struct serial_in_rdev *serial = NULL; |
151 | ||
152 | if (test_bit(CollisionCheck, &rdev->flags)) | |
153 | return 0; | |
154 | ||
025471f9 GJ |
155 | serial = kvmalloc(sizeof(struct serial_in_rdev) * serial_nums, |
156 | GFP_KERNEL); | |
69b00b5b GJ |
157 | if (!serial) |
158 | return -ENOMEM; | |
159 | ||
025471f9 GJ |
160 | for (i = 0; i < serial_nums; i++) { |
161 | struct serial_in_rdev *serial_tmp = &serial[i]; | |
162 | ||
163 | spin_lock_init(&serial_tmp->serial_lock); | |
164 | serial_tmp->serial_rb = RB_ROOT_CACHED; | |
165 | init_waitqueue_head(&serial_tmp->serial_io_wait); | |
166 | } | |
167 | ||
69b00b5b | 168 | rdev->serial = serial; |
404659cf | 169 | set_bit(CollisionCheck, &rdev->flags); |
3e148a32 | 170 | |
69b00b5b | 171 | return 0; |
3e148a32 GJ |
172 | } |
173 | ||
69b00b5b | 174 | static int rdevs_init_serial(struct mddev *mddev) |
11d3a9f6 GJ |
175 | { |
176 | struct md_rdev *rdev; | |
69b00b5b | 177 | int ret = 0; |
11d3a9f6 GJ |
178 | |
179 | rdev_for_each(rdev, mddev) { | |
69b00b5b GJ |
180 | ret = rdev_init_serial(rdev); |
181 | if (ret) | |
182 | break; | |
11d3a9f6 | 183 | } |
69b00b5b GJ |
184 | |
185 | /* Free all resources if pool is not existed */ | |
186 | if (ret && !mddev->serial_info_pool) | |
187 | rdevs_uninit_serial(mddev); | |
188 | ||
189 | return ret; | |
11d3a9f6 GJ |
190 | } |
191 | ||
963c555e | 192 | /* |
de31ee94 GJ |
193 | * rdev needs to enable serial stuffs if it meets the conditions: |
194 | * 1. it is multi-queue device flaged with writemostly. | |
195 | * 2. the write-behind mode is enabled. | |
196 | */ | |
197 | static int rdev_need_serial(struct md_rdev *rdev) | |
198 | { | |
199 | return (rdev && rdev->mddev->bitmap_info.max_write_behind > 0 && | |
e556f6ba | 200 | rdev->bdev->bd_disk->queue->nr_hw_queues != 1 && |
de31ee94 GJ |
201 | test_bit(WriteMostly, &rdev->flags)); |
202 | } | |
203 | ||
204 | /* | |
205 | * Init resource for rdev(s), then create serial_info_pool if: | |
206 | * 1. rdev is the first device which return true from rdev_enable_serial. | |
207 | * 2. rdev is NULL, means we want to enable serialization for all rdevs. | |
963c555e | 208 | */ |
404659cf | 209 | void mddev_create_serial_pool(struct mddev *mddev, struct md_rdev *rdev, |
11d3a9f6 | 210 | bool is_suspend) |
963c555e | 211 | { |
69b00b5b GJ |
212 | int ret = 0; |
213 | ||
de31ee94 GJ |
214 | if (rdev && !rdev_need_serial(rdev) && |
215 | !test_bit(CollisionCheck, &rdev->flags)) | |
963c555e GJ |
216 | return; |
217 | ||
de31ee94 GJ |
218 | if (!is_suspend) |
219 | mddev_suspend(mddev); | |
220 | ||
221 | if (!rdev) | |
69b00b5b | 222 | ret = rdevs_init_serial(mddev); |
de31ee94 | 223 | else |
69b00b5b GJ |
224 | ret = rdev_init_serial(rdev); |
225 | if (ret) | |
226 | goto abort; | |
de31ee94 | 227 | |
404659cf | 228 | if (mddev->serial_info_pool == NULL) { |
3024ba2d CL |
229 | /* |
230 | * already in memalloc noio context by | |
231 | * mddev_suspend() | |
232 | */ | |
404659cf GJ |
233 | mddev->serial_info_pool = |
234 | mempool_create_kmalloc_pool(NR_SERIAL_INFOS, | |
235 | sizeof(struct serial_info)); | |
69b00b5b GJ |
236 | if (!mddev->serial_info_pool) { |
237 | rdevs_uninit_serial(mddev); | |
404659cf | 238 | pr_err("can't alloc memory pool for serialization\n"); |
69b00b5b | 239 | } |
963c555e | 240 | } |
69b00b5b GJ |
241 | |
242 | abort: | |
de31ee94 GJ |
243 | if (!is_suspend) |
244 | mddev_resume(mddev); | |
963c555e | 245 | } |
963c555e GJ |
246 | |
247 | /* | |
de31ee94 GJ |
248 | * Free resource from rdev(s), and destroy serial_info_pool under conditions: |
249 | * 1. rdev is the last device flaged with CollisionCheck. | |
250 | * 2. when bitmap is destroyed while policy is not enabled. | |
251 | * 3. for disable policy, the pool is destroyed only when no rdev needs it. | |
963c555e | 252 | */ |
69b00b5b GJ |
253 | void mddev_destroy_serial_pool(struct mddev *mddev, struct md_rdev *rdev, |
254 | bool is_suspend) | |
963c555e | 255 | { |
11d3a9f6 | 256 | if (rdev && !test_bit(CollisionCheck, &rdev->flags)) |
963c555e GJ |
257 | return; |
258 | ||
404659cf | 259 | if (mddev->serial_info_pool) { |
963c555e | 260 | struct md_rdev *temp; |
de31ee94 | 261 | int num = 0; /* used to track if other rdevs need the pool */ |
963c555e | 262 | |
11d3a9f6 GJ |
263 | if (!is_suspend) |
264 | mddev_suspend(mddev); | |
265 | rdev_for_each(temp, mddev) { | |
266 | if (!rdev) { | |
69b00b5b GJ |
267 | if (!mddev->serialize_policy || |
268 | !rdev_need_serial(temp)) | |
269 | rdev_uninit_serial(temp); | |
de31ee94 GJ |
270 | else |
271 | num++; | |
272 | } else if (temp != rdev && | |
273 | test_bit(CollisionCheck, &temp->flags)) | |
963c555e | 274 | num++; |
11d3a9f6 GJ |
275 | } |
276 | ||
277 | if (rdev) | |
69b00b5b | 278 | rdev_uninit_serial(rdev); |
de31ee94 GJ |
279 | |
280 | if (num) | |
281 | pr_info("The mempool could be used by other devices\n"); | |
282 | else { | |
404659cf GJ |
283 | mempool_destroy(mddev->serial_info_pool); |
284 | mddev->serial_info_pool = NULL; | |
963c555e | 285 | } |
11d3a9f6 GJ |
286 | if (!is_suspend) |
287 | mddev_resume(mddev); | |
963c555e GJ |
288 | } |
289 | } | |
290 | ||
1da177e4 LT |
291 | static struct ctl_table_header *raid_table_header; |
292 | ||
82592c38 | 293 | static struct ctl_table raid_table[] = { |
1da177e4 | 294 | { |
1da177e4 LT |
295 | .procname = "speed_limit_min", |
296 | .data = &sysctl_speed_limit_min, | |
297 | .maxlen = sizeof(int), | |
80ca3a44 | 298 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 299 | .proc_handler = proc_dointvec, |
1da177e4 LT |
300 | }, |
301 | { | |
1da177e4 LT |
302 | .procname = "speed_limit_max", |
303 | .data = &sysctl_speed_limit_max, | |
304 | .maxlen = sizeof(int), | |
80ca3a44 | 305 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 306 | .proc_handler = proc_dointvec, |
1da177e4 | 307 | }, |
894d2491 | 308 | { } |
1da177e4 LT |
309 | }; |
310 | ||
82592c38 | 311 | static struct ctl_table raid_dir_table[] = { |
1da177e4 | 312 | { |
1da177e4 LT |
313 | .procname = "raid", |
314 | .maxlen = 0, | |
80ca3a44 | 315 | .mode = S_IRUGO|S_IXUGO, |
1da177e4 LT |
316 | .child = raid_table, |
317 | }, | |
894d2491 | 318 | { } |
1da177e4 LT |
319 | }; |
320 | ||
82592c38 | 321 | static struct ctl_table raid_root_table[] = { |
1da177e4 | 322 | { |
1da177e4 LT |
323 | .procname = "dev", |
324 | .maxlen = 0, | |
325 | .mode = 0555, | |
326 | .child = raid_dir_table, | |
327 | }, | |
894d2491 | 328 | { } |
1da177e4 LT |
329 | }; |
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 | ||
41d2d848 AP |
462 | struct md_io { |
463 | struct mddev *mddev; | |
464 | bio_end_io_t *orig_bi_end_io; | |
465 | void *orig_bi_private; | |
466 | unsigned long start_time; | |
00fe60ea | 467 | struct hd_struct *part; |
41d2d848 AP |
468 | }; |
469 | ||
470 | static void md_end_io(struct bio *bio) | |
471 | { | |
472 | struct md_io *md_io = bio->bi_private; | |
473 | struct mddev *mddev = md_io->mddev; | |
474 | ||
00fe60ea | 475 | part_end_io_acct(md_io->part, bio, md_io->start_time); |
41d2d848 AP |
476 | |
477 | bio->bi_end_io = md_io->orig_bi_end_io; | |
478 | bio->bi_private = md_io->orig_bi_private; | |
479 | ||
480 | mempool_free(md_io, &mddev->md_io_pool); | |
481 | ||
482 | if (bio->bi_end_io) | |
483 | bio->bi_end_io(bio); | |
484 | } | |
485 | ||
c62b37d9 | 486 | static blk_qc_t md_submit_bio(struct bio *bio) |
1da177e4 | 487 | { |
49077326 | 488 | const int rw = bio_data_dir(bio); |
e4fc5a74 | 489 | struct mddev *mddev = bio->bi_disk->private_data; |
49077326 | 490 | |
9a5a8597 | 491 | if (mddev == NULL || mddev->pers == NULL) { |
62f7b198 GP |
492 | bio_io_error(bio); |
493 | return BLK_QC_T_NONE; | |
494 | } | |
495 | ||
9a5a8597 | 496 | if (unlikely(test_bit(MD_BROKEN, &mddev->flags)) && (rw == WRITE)) { |
409c57f3 | 497 | bio_io_error(bio); |
dece1635 | 498 | return BLK_QC_T_NONE; |
409c57f3 | 499 | } |
9a5a8597 CIK |
500 | |
501 | blk_queue_split(&bio); | |
502 | ||
bbfa57c0 | 503 | if (mddev->ro == 1 && unlikely(rw == WRITE)) { |
4246a0b6 | 504 | if (bio_sectors(bio) != 0) |
4e4cbee9 | 505 | bio->bi_status = BLK_STS_IOERR; |
4246a0b6 | 506 | bio_endio(bio); |
dece1635 | 507 | return BLK_QC_T_NONE; |
bbfa57c0 | 508 | } |
49077326 | 509 | |
41d2d848 AP |
510 | if (bio->bi_end_io != md_end_io) { |
511 | struct md_io *md_io; | |
512 | ||
513 | md_io = mempool_alloc(&mddev->md_io_pool, GFP_NOIO); | |
514 | md_io->mddev = mddev; | |
515 | md_io->orig_bi_end_io = bio->bi_end_io; | |
516 | md_io->orig_bi_private = bio->bi_private; | |
517 | ||
518 | bio->bi_end_io = md_end_io; | |
519 | bio->bi_private = md_io; | |
520 | ||
00fe60ea SL |
521 | md_io->start_time = part_start_io_acct(mddev->gendisk, |
522 | &md_io->part, bio); | |
41d2d848 AP |
523 | } |
524 | ||
9c573de3 | 525 | /* bio could be mergeable after passing to underlayer */ |
1eff9d32 | 526 | bio->bi_opf &= ~REQ_NOMERGE; |
393debc2 SL |
527 | |
528 | md_handle_request(mddev, bio); | |
49077326 | 529 | |
dece1635 | 530 | return BLK_QC_T_NONE; |
409c57f3 N |
531 | } |
532 | ||
9e35b99c N |
533 | /* mddev_suspend makes sure no new requests are submitted |
534 | * to the device, and that any requests that have been submitted | |
535 | * are completely handled. | |
afa0f557 N |
536 | * Once mddev_detach() is called and completes, the module will be |
537 | * completely unused. | |
9e35b99c | 538 | */ |
fd01b88c | 539 | void mddev_suspend(struct mddev *mddev) |
409c57f3 | 540 | { |
092398dc | 541 | WARN_ON_ONCE(mddev->thread && current == mddev->thread->tsk); |
4d5324f7 | 542 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
543 | if (mddev->suspended++) |
544 | return; | |
409c57f3 | 545 | synchronize_rcu(); |
cc27b0c7 | 546 | wake_up(&mddev->sb_wait); |
35bfc521 N |
547 | set_bit(MD_ALLOW_SB_UPDATE, &mddev->flags); |
548 | smp_mb__after_atomic(); | |
409c57f3 N |
549 | wait_event(mddev->sb_wait, atomic_read(&mddev->active_io) == 0); |
550 | mddev->pers->quiesce(mddev, 1); | |
35bfc521 N |
551 | clear_bit_unlock(MD_ALLOW_SB_UPDATE, &mddev->flags); |
552 | wait_event(mddev->sb_wait, !test_bit(MD_UPDATING_SB, &mddev->flags)); | |
0d9f4f13 JB |
553 | |
554 | del_timer_sync(&mddev->safemode_timer); | |
78f57ef9 CL |
555 | /* restrict memory reclaim I/O during raid array is suspend */ |
556 | mddev->noio_flag = memalloc_noio_save(); | |
409c57f3 | 557 | } |
390ee602 | 558 | EXPORT_SYMBOL_GPL(mddev_suspend); |
409c57f3 | 559 | |
fd01b88c | 560 | void mddev_resume(struct mddev *mddev) |
409c57f3 | 561 | { |
78f57ef9 CL |
562 | /* entred the memalloc scope from mddev_suspend() */ |
563 | memalloc_noio_restore(mddev->noio_flag); | |
4d5324f7 | 564 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
565 | if (--mddev->suspended) |
566 | return; | |
409c57f3 N |
567 | wake_up(&mddev->sb_wait); |
568 | mddev->pers->quiesce(mddev, 0); | |
0fd018af | 569 | |
47525e59 | 570 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
0fd018af JB |
571 | md_wakeup_thread(mddev->thread); |
572 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
1da177e4 | 573 | } |
390ee602 | 574 | EXPORT_SYMBOL_GPL(mddev_resume); |
1da177e4 | 575 | |
a2826aa9 | 576 | /* |
e9c7469b | 577 | * Generic flush handling for md |
a2826aa9 N |
578 | */ |
579 | ||
4bc034d3 | 580 | static void md_end_flush(struct bio *bio) |
a2826aa9 | 581 | { |
4bc034d3 N |
582 | struct md_rdev *rdev = bio->bi_private; |
583 | struct mddev *mddev = rdev->mddev; | |
a2826aa9 N |
584 | |
585 | rdev_dec_pending(rdev, mddev); | |
586 | ||
4bc034d3 N |
587 | if (atomic_dec_and_test(&mddev->flush_pending)) { |
588 | /* The pre-request flush has finished */ | |
589 | queue_work(md_wq, &mddev->flush_work); | |
a2826aa9 | 590 | } |
4bc034d3 | 591 | bio_put(bio); |
5a409b4f | 592 | } |
a7a07e69 | 593 | |
4bc034d3 N |
594 | static void md_submit_flush_data(struct work_struct *ws); |
595 | ||
596 | static void submit_flushes(struct work_struct *ws) | |
a2826aa9 | 597 | { |
4bc034d3 | 598 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); |
3cb03002 | 599 | struct md_rdev *rdev; |
a2826aa9 | 600 | |
2bc13b83 | 601 | mddev->start_flush = ktime_get_boottime(); |
4bc034d3 N |
602 | INIT_WORK(&mddev->flush_work, md_submit_flush_data); |
603 | atomic_set(&mddev->flush_pending, 1); | |
a2826aa9 | 604 | rcu_read_lock(); |
dafb20fa | 605 | rdev_for_each_rcu(rdev, mddev) |
a2826aa9 N |
606 | if (rdev->raid_disk >= 0 && |
607 | !test_bit(Faulty, &rdev->flags)) { | |
608 | /* Take two references, one is dropped | |
609 | * when request finishes, one after | |
610 | * we reclaim rcu_read_lock | |
611 | */ | |
612 | struct bio *bi; | |
613 | atomic_inc(&rdev->nr_pending); | |
614 | atomic_inc(&rdev->nr_pending); | |
615 | rcu_read_unlock(); | |
b5e1b8ce | 616 | bi = bio_alloc_mddev(GFP_NOIO, 0, mddev); |
5a409b4f | 617 | bi->bi_end_io = md_end_flush; |
4bc034d3 N |
618 | bi->bi_private = rdev; |
619 | bio_set_dev(bi, rdev->bdev); | |
70fd7614 | 620 | bi->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH; |
4bc034d3 | 621 | atomic_inc(&mddev->flush_pending); |
4e49ea4a | 622 | submit_bio(bi); |
a2826aa9 N |
623 | rcu_read_lock(); |
624 | rdev_dec_pending(rdev, mddev); | |
625 | } | |
626 | rcu_read_unlock(); | |
4bc034d3 N |
627 | if (atomic_dec_and_test(&mddev->flush_pending)) |
628 | queue_work(md_wq, &mddev->flush_work); | |
629 | } | |
a2826aa9 | 630 | |
4bc034d3 N |
631 | static void md_submit_flush_data(struct work_struct *ws) |
632 | { | |
633 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); | |
634 | struct bio *bio = mddev->flush_bio; | |
635 | ||
636 | /* | |
637 | * must reset flush_bio before calling into md_handle_request to avoid a | |
638 | * deadlock, because other bios passed md_handle_request suspend check | |
639 | * could wait for this and below md_handle_request could wait for those | |
640 | * bios because of suspend check | |
641 | */ | |
81ba3c24 | 642 | mddev->prev_flush_start = mddev->start_flush; |
4bc034d3 N |
643 | mddev->flush_bio = NULL; |
644 | wake_up(&mddev->sb_wait); | |
645 | ||
646 | if (bio->bi_iter.bi_size == 0) { | |
647 | /* an empty barrier - all done */ | |
648 | bio_endio(bio); | |
649 | } else { | |
650 | bio->bi_opf &= ~REQ_PREFLUSH; | |
651 | md_handle_request(mddev, bio); | |
a2826aa9 | 652 | } |
a2826aa9 | 653 | } |
4bc034d3 | 654 | |
775d7831 DJ |
655 | /* |
656 | * Manages consolidation of flushes and submitting any flushes needed for | |
657 | * a bio with REQ_PREFLUSH. Returns true if the bio is finished or is | |
658 | * being finished in another context. Returns false if the flushing is | |
659 | * complete but still needs the I/O portion of the bio to be processed. | |
660 | */ | |
661 | bool md_flush_request(struct mddev *mddev, struct bio *bio) | |
4bc034d3 | 662 | { |
81ba3c24 | 663 | ktime_t req_start = ktime_get_boottime(); |
4bc034d3 N |
664 | spin_lock_irq(&mddev->lock); |
665 | wait_event_lock_irq(mddev->sb_wait, | |
2bc13b83 | 666 | !mddev->flush_bio || |
81ba3c24 | 667 | ktime_after(mddev->prev_flush_start, req_start), |
4bc034d3 | 668 | mddev->lock); |
81ba3c24 | 669 | if (!ktime_after(mddev->prev_flush_start, req_start)) { |
2bc13b83 N |
670 | WARN_ON(mddev->flush_bio); |
671 | mddev->flush_bio = bio; | |
672 | bio = NULL; | |
673 | } | |
4bc034d3 N |
674 | spin_unlock_irq(&mddev->lock); |
675 | ||
2bc13b83 N |
676 | if (!bio) { |
677 | INIT_WORK(&mddev->flush_work, submit_flushes); | |
678 | queue_work(md_wq, &mddev->flush_work); | |
679 | } else { | |
680 | /* flush was performed for some other bio while we waited. */ | |
681 | if (bio->bi_iter.bi_size == 0) | |
682 | /* an empty barrier - all done */ | |
683 | bio_endio(bio); | |
684 | else { | |
685 | bio->bi_opf &= ~REQ_PREFLUSH; | |
775d7831 | 686 | return false; |
2bc13b83 N |
687 | } |
688 | } | |
775d7831 | 689 | return true; |
4bc034d3 | 690 | } |
e9c7469b | 691 | EXPORT_SYMBOL(md_flush_request); |
409c57f3 | 692 | |
fd01b88c | 693 | static inline struct mddev *mddev_get(struct mddev *mddev) |
1da177e4 LT |
694 | { |
695 | atomic_inc(&mddev->active); | |
696 | return mddev; | |
697 | } | |
698 | ||
5fd3a17e | 699 | static void mddev_delayed_delete(struct work_struct *ws); |
d3374825 | 700 | |
fd01b88c | 701 | static void mddev_put(struct mddev *mddev) |
1da177e4 LT |
702 | { |
703 | if (!atomic_dec_and_lock(&mddev->active, &all_mddevs_lock)) | |
704 | return; | |
d3374825 | 705 | if (!mddev->raid_disks && list_empty(&mddev->disks) && |
cbd19983 N |
706 | mddev->ctime == 0 && !mddev->hold_active) { |
707 | /* Array is not configured at all, and not held active, | |
708 | * so destroy it */ | |
af8a2434 | 709 | list_del_init(&mddev->all_mddevs); |
28dec870 KO |
710 | |
711 | /* | |
712 | * Call queue_work inside the spinlock so that | |
713 | * flush_workqueue() after mddev_find will succeed in waiting | |
714 | * for the work to be done. | |
715 | */ | |
716 | INIT_WORK(&mddev->del_work, mddev_delayed_delete); | |
717 | queue_work(md_misc_wq, &mddev->del_work); | |
d3374825 N |
718 | } |
719 | spin_unlock(&all_mddevs_lock); | |
1da177e4 LT |
720 | } |
721 | ||
8376d3c1 | 722 | static void md_safemode_timeout(struct timer_list *t); |
25b2edfa | 723 | |
fd01b88c | 724 | void mddev_init(struct mddev *mddev) |
fafd7fb0 | 725 | { |
28dec870 | 726 | kobject_init(&mddev->kobj, &md_ktype); |
fafd7fb0 N |
727 | mutex_init(&mddev->open_mutex); |
728 | mutex_init(&mddev->reconfig_mutex); | |
729 | mutex_init(&mddev->bitmap_info.mutex); | |
730 | INIT_LIST_HEAD(&mddev->disks); | |
731 | INIT_LIST_HEAD(&mddev->all_mddevs); | |
8376d3c1 | 732 | timer_setup(&mddev->safemode_timer, md_safemode_timeout, 0); |
fafd7fb0 N |
733 | atomic_set(&mddev->active, 1); |
734 | atomic_set(&mddev->openers, 0); | |
735 | atomic_set(&mddev->active_io, 0); | |
85572d7c | 736 | spin_lock_init(&mddev->lock); |
4bc034d3 | 737 | atomic_set(&mddev->flush_pending, 0); |
fafd7fb0 N |
738 | init_waitqueue_head(&mddev->sb_wait); |
739 | init_waitqueue_head(&mddev->recovery_wait); | |
740 | mddev->reshape_position = MaxSector; | |
2c810cdd | 741 | mddev->reshape_backwards = 0; |
c4a39551 | 742 | mddev->last_sync_action = "none"; |
fafd7fb0 N |
743 | mddev->resync_min = 0; |
744 | mddev->resync_max = MaxSector; | |
745 | mddev->level = LEVEL_NONE; | |
746 | } | |
390ee602 | 747 | EXPORT_SYMBOL_GPL(mddev_init); |
fafd7fb0 | 748 | |
f72ffdd6 | 749 | static struct mddev *mddev_find(dev_t unit) |
1da177e4 | 750 | { |
fd01b88c | 751 | struct mddev *mddev, *new = NULL; |
1da177e4 | 752 | |
8f5f02c4 N |
753 | if (unit && MAJOR(unit) != MD_MAJOR) |
754 | unit &= ~((1<<MdpMinorShift)-1); | |
755 | ||
1da177e4 LT |
756 | retry: |
757 | spin_lock(&all_mddevs_lock); | |
efeb53c0 N |
758 | |
759 | if (unit) { | |
760 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
761 | if (mddev->unit == unit) { | |
762 | mddev_get(mddev); | |
763 | spin_unlock(&all_mddevs_lock); | |
764 | kfree(new); | |
765 | return mddev; | |
766 | } | |
767 | ||
768 | if (new) { | |
769 | list_add(&new->all_mddevs, &all_mddevs); | |
1da177e4 | 770 | spin_unlock(&all_mddevs_lock); |
efeb53c0 N |
771 | new->hold_active = UNTIL_IOCTL; |
772 | return new; | |
1da177e4 | 773 | } |
efeb53c0 N |
774 | } else if (new) { |
775 | /* find an unused unit number */ | |
776 | static int next_minor = 512; | |
777 | int start = next_minor; | |
778 | int is_free = 0; | |
779 | int dev = 0; | |
780 | while (!is_free) { | |
781 | dev = MKDEV(MD_MAJOR, next_minor); | |
782 | next_minor++; | |
783 | if (next_minor > MINORMASK) | |
784 | next_minor = 0; | |
785 | if (next_minor == start) { | |
786 | /* Oh dear, all in use. */ | |
787 | spin_unlock(&all_mddevs_lock); | |
788 | kfree(new); | |
789 | return NULL; | |
790 | } | |
f72ffdd6 | 791 | |
efeb53c0 N |
792 | is_free = 1; |
793 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
794 | if (mddev->unit == dev) { | |
795 | is_free = 0; | |
796 | break; | |
797 | } | |
798 | } | |
799 | new->unit = dev; | |
800 | new->md_minor = MINOR(dev); | |
801 | new->hold_active = UNTIL_STOP; | |
1da177e4 LT |
802 | list_add(&new->all_mddevs, &all_mddevs); |
803 | spin_unlock(&all_mddevs_lock); | |
804 | return new; | |
805 | } | |
806 | spin_unlock(&all_mddevs_lock); | |
807 | ||
9ffae0cf | 808 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
1da177e4 LT |
809 | if (!new) |
810 | return NULL; | |
811 | ||
1da177e4 LT |
812 | new->unit = unit; |
813 | if (MAJOR(unit) == MD_MAJOR) | |
814 | new->md_minor = MINOR(unit); | |
815 | else | |
816 | new->md_minor = MINOR(unit) >> MdpMinorShift; | |
817 | ||
fafd7fb0 | 818 | mddev_init(new); |
1da177e4 | 819 | |
1da177e4 LT |
820 | goto retry; |
821 | } | |
822 | ||
b6eb127d N |
823 | static struct attribute_group md_redundancy_group; |
824 | ||
5c47daf6 | 825 | void mddev_unlock(struct mddev *mddev) |
1da177e4 | 826 | { |
a64c876f | 827 | if (mddev->to_remove) { |
b6eb127d N |
828 | /* These cannot be removed under reconfig_mutex as |
829 | * an access to the files will try to take reconfig_mutex | |
830 | * while holding the file unremovable, which leads to | |
831 | * a deadlock. | |
bb4f1e9d N |
832 | * So hold set sysfs_active while the remove in happeing, |
833 | * and anything else which might set ->to_remove or my | |
834 | * otherwise change the sysfs namespace will fail with | |
835 | * -EBUSY if sysfs_active is still set. | |
836 | * We set sysfs_active under reconfig_mutex and elsewhere | |
837 | * test it under the same mutex to ensure its correct value | |
838 | * is seen. | |
b6eb127d | 839 | */ |
a64c876f N |
840 | struct attribute_group *to_remove = mddev->to_remove; |
841 | mddev->to_remove = NULL; | |
bb4f1e9d | 842 | mddev->sysfs_active = 1; |
b6eb127d N |
843 | mutex_unlock(&mddev->reconfig_mutex); |
844 | ||
00bcb4ac N |
845 | if (mddev->kobj.sd) { |
846 | if (to_remove != &md_redundancy_group) | |
847 | sysfs_remove_group(&mddev->kobj, to_remove); | |
848 | if (mddev->pers == NULL || | |
849 | mddev->pers->sync_request == NULL) { | |
850 | sysfs_remove_group(&mddev->kobj, &md_redundancy_group); | |
851 | if (mddev->sysfs_action) | |
852 | sysfs_put(mddev->sysfs_action); | |
e8efa9b8 JB |
853 | if (mddev->sysfs_completed) |
854 | sysfs_put(mddev->sysfs_completed); | |
855 | if (mddev->sysfs_degraded) | |
856 | sysfs_put(mddev->sysfs_degraded); | |
00bcb4ac | 857 | mddev->sysfs_action = NULL; |
e8efa9b8 JB |
858 | mddev->sysfs_completed = NULL; |
859 | mddev->sysfs_degraded = NULL; | |
00bcb4ac | 860 | } |
a64c876f | 861 | } |
bb4f1e9d | 862 | mddev->sysfs_active = 0; |
b6eb127d N |
863 | } else |
864 | mutex_unlock(&mddev->reconfig_mutex); | |
1da177e4 | 865 | |
751e67ca CD |
866 | /* As we've dropped the mutex we need a spinlock to |
867 | * make sure the thread doesn't disappear | |
01f96c0a N |
868 | */ |
869 | spin_lock(&pers_lock); | |
005eca5e | 870 | md_wakeup_thread(mddev->thread); |
4d5324f7 | 871 | wake_up(&mddev->sb_wait); |
01f96c0a | 872 | spin_unlock(&pers_lock); |
1da177e4 | 873 | } |
5c47daf6 | 874 | EXPORT_SYMBOL_GPL(mddev_unlock); |
1da177e4 | 875 | |
57d051dc | 876 | struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr) |
1ca69c4b N |
877 | { |
878 | struct md_rdev *rdev; | |
879 | ||
880 | rdev_for_each_rcu(rdev, mddev) | |
881 | if (rdev->desc_nr == nr) | |
882 | return rdev; | |
883 | ||
884 | return NULL; | |
885 | } | |
57d051dc | 886 | EXPORT_SYMBOL_GPL(md_find_rdev_nr_rcu); |
1ca69c4b N |
887 | |
888 | static struct md_rdev *find_rdev(struct mddev *mddev, dev_t dev) | |
1da177e4 | 889 | { |
3cb03002 | 890 | struct md_rdev *rdev; |
1da177e4 | 891 | |
dafb20fa | 892 | rdev_for_each(rdev, mddev) |
1da177e4 LT |
893 | if (rdev->bdev->bd_dev == dev) |
894 | return rdev; | |
159ec1fc | 895 | |
1da177e4 LT |
896 | return NULL; |
897 | } | |
898 | ||
1532d9e8 | 899 | struct md_rdev *md_find_rdev_rcu(struct mddev *mddev, dev_t dev) |
1ca69c4b N |
900 | { |
901 | struct md_rdev *rdev; | |
902 | ||
903 | rdev_for_each_rcu(rdev, mddev) | |
904 | if (rdev->bdev->bd_dev == dev) | |
905 | return rdev; | |
906 | ||
907 | return NULL; | |
908 | } | |
1532d9e8 | 909 | EXPORT_SYMBOL_GPL(md_find_rdev_rcu); |
1ca69c4b | 910 | |
84fc4b56 | 911 | static struct md_personality *find_pers(int level, char *clevel) |
2604b703 | 912 | { |
84fc4b56 | 913 | struct md_personality *pers; |
d9d166c2 N |
914 | list_for_each_entry(pers, &pers_list, list) { |
915 | if (level != LEVEL_NONE && pers->level == level) | |
2604b703 | 916 | return pers; |
d9d166c2 N |
917 | if (strcmp(pers->name, clevel)==0) |
918 | return pers; | |
919 | } | |
2604b703 N |
920 | return NULL; |
921 | } | |
922 | ||
b73df2d3 | 923 | /* return the offset of the super block in 512byte sectors */ |
3cb03002 | 924 | static inline sector_t calc_dev_sboffset(struct md_rdev *rdev) |
1da177e4 | 925 | { |
57b2caa3 | 926 | sector_t num_sectors = i_size_read(rdev->bdev->bd_inode) / 512; |
b73df2d3 | 927 | return MD_NEW_SIZE_SECTORS(num_sectors); |
1da177e4 LT |
928 | } |
929 | ||
f72ffdd6 | 930 | static int alloc_disk_sb(struct md_rdev *rdev) |
1da177e4 | 931 | { |
1da177e4 | 932 | rdev->sb_page = alloc_page(GFP_KERNEL); |
7f0f0d87 | 933 | if (!rdev->sb_page) |
ebc24337 | 934 | return -ENOMEM; |
1da177e4 LT |
935 | return 0; |
936 | } | |
937 | ||
545c8795 | 938 | void md_rdev_clear(struct md_rdev *rdev) |
1da177e4 LT |
939 | { |
940 | if (rdev->sb_page) { | |
2d1f3b5d | 941 | put_page(rdev->sb_page); |
1da177e4 LT |
942 | rdev->sb_loaded = 0; |
943 | rdev->sb_page = NULL; | |
0f420358 | 944 | rdev->sb_start = 0; |
dd8ac336 | 945 | rdev->sectors = 0; |
1da177e4 | 946 | } |
2699b672 N |
947 | if (rdev->bb_page) { |
948 | put_page(rdev->bb_page); | |
949 | rdev->bb_page = NULL; | |
950 | } | |
d3b407fb | 951 | badblocks_exit(&rdev->badblocks); |
1da177e4 | 952 | } |
545c8795 | 953 | EXPORT_SYMBOL_GPL(md_rdev_clear); |
1da177e4 | 954 | |
4246a0b6 | 955 | static void super_written(struct bio *bio) |
7bfa19f2 | 956 | { |
3cb03002 | 957 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 958 | struct mddev *mddev = rdev->mddev; |
7bfa19f2 | 959 | |
4e4cbee9 | 960 | if (bio->bi_status) { |
b3db8a21 GJ |
961 | pr_err("md: %s gets error=%d\n", __func__, |
962 | blk_status_to_errno(bio->bi_status)); | |
a9701a30 | 963 | md_error(mddev, rdev); |
46533ff7 N |
964 | if (!test_bit(Faulty, &rdev->flags) |
965 | && (bio->bi_opf & MD_FAILFAST)) { | |
2953079c | 966 | set_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags); |
46533ff7 N |
967 | set_bit(LastDev, &rdev->flags); |
968 | } | |
969 | } else | |
970 | clear_bit(LastDev, &rdev->flags); | |
7bfa19f2 | 971 | |
a9701a30 N |
972 | if (atomic_dec_and_test(&mddev->pending_writes)) |
973 | wake_up(&mddev->sb_wait); | |
ed3b98c7 | 974 | rdev_dec_pending(rdev, mddev); |
f8b58edf | 975 | bio_put(bio); |
7bfa19f2 N |
976 | } |
977 | ||
fd01b88c | 978 | void md_super_write(struct mddev *mddev, struct md_rdev *rdev, |
7bfa19f2 N |
979 | sector_t sector, int size, struct page *page) |
980 | { | |
981 | /* write first size bytes of page to sector of rdev | |
982 | * Increment mddev->pending_writes before returning | |
983 | * and decrement it on completion, waking up sb_wait | |
984 | * if zero is reached. | |
985 | * If an error occurred, call md_error | |
986 | */ | |
46533ff7 N |
987 | struct bio *bio; |
988 | int ff = 0; | |
989 | ||
4b6c1060 HM |
990 | if (!page) |
991 | return; | |
992 | ||
46533ff7 N |
993 | if (test_bit(Faulty, &rdev->flags)) |
994 | return; | |
995 | ||
5a85071c | 996 | bio = md_bio_alloc_sync(mddev); |
7bfa19f2 | 997 | |
ed3b98c7 SL |
998 | atomic_inc(&rdev->nr_pending); |
999 | ||
74d46992 | 1000 | bio_set_dev(bio, rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev); |
4f024f37 | 1001 | bio->bi_iter.bi_sector = sector; |
7bfa19f2 N |
1002 | bio_add_page(bio, page, size, 0); |
1003 | bio->bi_private = rdev; | |
1004 | bio->bi_end_io = super_written; | |
46533ff7 N |
1005 | |
1006 | if (test_bit(MD_FAILFAST_SUPPORTED, &mddev->flags) && | |
1007 | test_bit(FailFast, &rdev->flags) && | |
1008 | !test_bit(LastDev, &rdev->flags)) | |
1009 | ff = MD_FAILFAST; | |
5a8948f8 | 1010 | bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH | REQ_FUA | ff; |
a9701a30 | 1011 | |
7bfa19f2 | 1012 | atomic_inc(&mddev->pending_writes); |
4e49ea4a | 1013 | submit_bio(bio); |
a9701a30 N |
1014 | } |
1015 | ||
46533ff7 | 1016 | int md_super_wait(struct mddev *mddev) |
a9701a30 | 1017 | { |
e9c7469b | 1018 | /* wait for all superblock writes that were scheduled to complete */ |
1967cd56 | 1019 | wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0); |
2953079c | 1020 | if (test_and_clear_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags)) |
46533ff7 N |
1021 | return -EAGAIN; |
1022 | return 0; | |
7bfa19f2 N |
1023 | } |
1024 | ||
3cb03002 | 1025 | int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, |
796a5cf0 | 1026 | struct page *page, int op, int op_flags, bool metadata_op) |
1da177e4 | 1027 | { |
5a85071c | 1028 | struct bio *bio = md_bio_alloc_sync(rdev->mddev); |
1da177e4 LT |
1029 | int ret; |
1030 | ||
74d46992 CH |
1031 | if (metadata_op && rdev->meta_bdev) |
1032 | bio_set_dev(bio, rdev->meta_bdev); | |
1033 | else | |
1034 | bio_set_dev(bio, rdev->bdev); | |
796a5cf0 | 1035 | bio_set_op_attrs(bio, op, op_flags); |
ccebd4c4 | 1036 | if (metadata_op) |
4f024f37 | 1037 | bio->bi_iter.bi_sector = sector + rdev->sb_start; |
1fdd6fc9 N |
1038 | else if (rdev->mddev->reshape_position != MaxSector && |
1039 | (rdev->mddev->reshape_backwards == | |
1040 | (sector >= rdev->mddev->reshape_position))) | |
4f024f37 | 1041 | bio->bi_iter.bi_sector = sector + rdev->new_data_offset; |
ccebd4c4 | 1042 | else |
4f024f37 | 1043 | bio->bi_iter.bi_sector = sector + rdev->data_offset; |
1da177e4 | 1044 | bio_add_page(bio, page, size, 0); |
4e49ea4a MC |
1045 | |
1046 | submit_bio_wait(bio); | |
1da177e4 | 1047 | |
4e4cbee9 | 1048 | ret = !bio->bi_status; |
1da177e4 LT |
1049 | bio_put(bio); |
1050 | return ret; | |
1051 | } | |
a8745db2 | 1052 | EXPORT_SYMBOL_GPL(sync_page_io); |
1da177e4 | 1053 | |
f72ffdd6 | 1054 | static int read_disk_sb(struct md_rdev *rdev, int size) |
1da177e4 LT |
1055 | { |
1056 | char b[BDEVNAME_SIZE]; | |
403df478 | 1057 | |
1da177e4 LT |
1058 | if (rdev->sb_loaded) |
1059 | return 0; | |
1060 | ||
796a5cf0 | 1061 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, REQ_OP_READ, 0, true)) |
1da177e4 LT |
1062 | goto fail; |
1063 | rdev->sb_loaded = 1; | |
1064 | return 0; | |
1065 | ||
1066 | fail: | |
9d48739e N |
1067 | pr_err("md: disabled device %s, could not read superblock.\n", |
1068 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
1069 | return -EINVAL; |
1070 | } | |
1071 | ||
e6fd2093 | 1072 | static int md_uuid_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 | 1073 | { |
f72ffdd6 | 1074 | return sb1->set_uuid0 == sb2->set_uuid0 && |
05710466 AN |
1075 | sb1->set_uuid1 == sb2->set_uuid1 && |
1076 | sb1->set_uuid2 == sb2->set_uuid2 && | |
1077 | sb1->set_uuid3 == sb2->set_uuid3; | |
1da177e4 LT |
1078 | } |
1079 | ||
e6fd2093 | 1080 | static int md_sb_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 LT |
1081 | { |
1082 | int ret; | |
1083 | mdp_super_t *tmp1, *tmp2; | |
1084 | ||
1085 | tmp1 = kmalloc(sizeof(*tmp1),GFP_KERNEL); | |
1086 | tmp2 = kmalloc(sizeof(*tmp2),GFP_KERNEL); | |
1087 | ||
1088 | if (!tmp1 || !tmp2) { | |
1089 | ret = 0; | |
1da177e4 LT |
1090 | goto abort; |
1091 | } | |
1092 | ||
1093 | *tmp1 = *sb1; | |
1094 | *tmp2 = *sb2; | |
1095 | ||
1096 | /* | |
1097 | * nr_disks is not constant | |
1098 | */ | |
1099 | tmp1->nr_disks = 0; | |
1100 | tmp2->nr_disks = 0; | |
1101 | ||
ce0c8e05 | 1102 | ret = (memcmp(tmp1, tmp2, MD_SB_GENERIC_CONSTANT_WORDS * 4) == 0); |
1da177e4 | 1103 | abort: |
990a8baf JJ |
1104 | kfree(tmp1); |
1105 | kfree(tmp2); | |
1da177e4 LT |
1106 | return ret; |
1107 | } | |
1108 | ||
4d167f09 N |
1109 | static u32 md_csum_fold(u32 csum) |
1110 | { | |
1111 | csum = (csum & 0xffff) + (csum >> 16); | |
1112 | return (csum & 0xffff) + (csum >> 16); | |
1113 | } | |
1114 | ||
f72ffdd6 | 1115 | static unsigned int calc_sb_csum(mdp_super_t *sb) |
1da177e4 | 1116 | { |
4d167f09 N |
1117 | u64 newcsum = 0; |
1118 | u32 *sb32 = (u32*)sb; | |
1119 | int i; | |
1da177e4 LT |
1120 | unsigned int disk_csum, csum; |
1121 | ||
1122 | disk_csum = sb->sb_csum; | |
1123 | sb->sb_csum = 0; | |
4d167f09 N |
1124 | |
1125 | for (i = 0; i < MD_SB_BYTES/4 ; i++) | |
1126 | newcsum += sb32[i]; | |
1127 | csum = (newcsum & 0xffffffff) + (newcsum>>32); | |
1128 | ||
4d167f09 N |
1129 | #ifdef CONFIG_ALPHA |
1130 | /* This used to use csum_partial, which was wrong for several | |
1131 | * reasons including that different results are returned on | |
1132 | * different architectures. It isn't critical that we get exactly | |
1133 | * the same return value as before (we always csum_fold before | |
1134 | * testing, and that removes any differences). However as we | |
1135 | * know that csum_partial always returned a 16bit value on | |
1136 | * alphas, do a fold to maximise conformity to previous behaviour. | |
1137 | */ | |
1138 | sb->sb_csum = md_csum_fold(disk_csum); | |
1139 | #else | |
1da177e4 | 1140 | sb->sb_csum = disk_csum; |
4d167f09 | 1141 | #endif |
1da177e4 LT |
1142 | return csum; |
1143 | } | |
1144 | ||
1da177e4 LT |
1145 | /* |
1146 | * Handle superblock details. | |
1147 | * We want to be able to handle multiple superblock formats | |
1148 | * so we have a common interface to them all, and an array of | |
1149 | * different handlers. | |
1150 | * We rely on user-space to write the initial superblock, and support | |
1151 | * reading and updating of superblocks. | |
1152 | * Interface methods are: | |
3cb03002 | 1153 | * int load_super(struct md_rdev *dev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1154 | * loads and validates a superblock on dev. |
1155 | * if refdev != NULL, compare superblocks on both devices | |
1156 | * Return: | |
1157 | * 0 - dev has a superblock that is compatible with refdev | |
1158 | * 1 - dev has a superblock that is compatible and newer than refdev | |
1159 | * so dev should be used as the refdev in future | |
1160 | * -EINVAL superblock incompatible or invalid | |
1161 | * -othererror e.g. -EIO | |
1162 | * | |
fd01b88c | 1163 | * int validate_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1164 | * Verify that dev is acceptable into mddev. |
1165 | * The first time, mddev->raid_disks will be 0, and data from | |
1166 | * dev should be merged in. Subsequent calls check that dev | |
1167 | * is new enough. Return 0 or -EINVAL | |
1168 | * | |
fd01b88c | 1169 | * void sync_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1170 | * Update the superblock for rdev with data in mddev |
1171 | * This does not write to disc. | |
1172 | * | |
1173 | */ | |
1174 | ||
1175 | struct super_type { | |
0cd17fec CW |
1176 | char *name; |
1177 | struct module *owner; | |
c6563a8c N |
1178 | int (*load_super)(struct md_rdev *rdev, |
1179 | struct md_rdev *refdev, | |
0cd17fec | 1180 | int minor_version); |
c6563a8c N |
1181 | int (*validate_super)(struct mddev *mddev, |
1182 | struct md_rdev *rdev); | |
1183 | void (*sync_super)(struct mddev *mddev, | |
1184 | struct md_rdev *rdev); | |
3cb03002 | 1185 | unsigned long long (*rdev_size_change)(struct md_rdev *rdev, |
15f4a5fd | 1186 | sector_t num_sectors); |
c6563a8c N |
1187 | int (*allow_new_offset)(struct md_rdev *rdev, |
1188 | unsigned long long new_offset); | |
1da177e4 LT |
1189 | }; |
1190 | ||
0894cc30 AN |
1191 | /* |
1192 | * Check that the given mddev has no bitmap. | |
1193 | * | |
1194 | * This function is called from the run method of all personalities that do not | |
1195 | * support bitmaps. It prints an error message and returns non-zero if mddev | |
1196 | * has a bitmap. Otherwise, it returns 0. | |
1197 | * | |
1198 | */ | |
fd01b88c | 1199 | int md_check_no_bitmap(struct mddev *mddev) |
0894cc30 | 1200 | { |
c3d9714e | 1201 | if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset) |
0894cc30 | 1202 | return 0; |
9d48739e | 1203 | pr_warn("%s: bitmaps are not supported for %s\n", |
0894cc30 AN |
1204 | mdname(mddev), mddev->pers->name); |
1205 | return 1; | |
1206 | } | |
1207 | EXPORT_SYMBOL(md_check_no_bitmap); | |
1208 | ||
1da177e4 | 1209 | /* |
f72ffdd6 | 1210 | * load_super for 0.90.0 |
1da177e4 | 1211 | */ |
3cb03002 | 1212 | static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1213 | { |
1214 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
1215 | mdp_super_t *sb; | |
1216 | int ret; | |
228fc7d7 | 1217 | bool spare_disk = true; |
1da177e4 LT |
1218 | |
1219 | /* | |
0f420358 | 1220 | * Calculate the position of the superblock (512byte sectors), |
1da177e4 LT |
1221 | * it's at the end of the disk. |
1222 | * | |
1223 | * It also happens to be a multiple of 4Kb. | |
1224 | */ | |
57b2caa3 | 1225 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 1226 | |
0002b271 | 1227 | ret = read_disk_sb(rdev, MD_SB_BYTES); |
9d48739e N |
1228 | if (ret) |
1229 | return ret; | |
1da177e4 LT |
1230 | |
1231 | ret = -EINVAL; | |
1232 | ||
1233 | bdevname(rdev->bdev, b); | |
65a06f06 | 1234 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1235 | |
1236 | if (sb->md_magic != MD_SB_MAGIC) { | |
9d48739e | 1237 | pr_warn("md: invalid raid superblock magic on %s\n", b); |
1da177e4 LT |
1238 | goto abort; |
1239 | } | |
1240 | ||
1241 | if (sb->major_version != 0 || | |
f6705578 N |
1242 | sb->minor_version < 90 || |
1243 | sb->minor_version > 91) { | |
9d48739e N |
1244 | pr_warn("Bad version number %d.%d on %s\n", |
1245 | sb->major_version, sb->minor_version, b); | |
1da177e4 LT |
1246 | goto abort; |
1247 | } | |
1248 | ||
1249 | if (sb->raid_disks <= 0) | |
1250 | goto abort; | |
1251 | ||
4d167f09 | 1252 | if (md_csum_fold(calc_sb_csum(sb)) != md_csum_fold(sb->sb_csum)) { |
9d48739e | 1253 | pr_warn("md: invalid superblock checksum on %s\n", b); |
1da177e4 LT |
1254 | goto abort; |
1255 | } | |
1256 | ||
1257 | rdev->preferred_minor = sb->md_minor; | |
1258 | rdev->data_offset = 0; | |
c6563a8c | 1259 | rdev->new_data_offset = 0; |
0002b271 | 1260 | rdev->sb_size = MD_SB_BYTES; |
9f2f3830 | 1261 | rdev->badblocks.shift = -1; |
1da177e4 LT |
1262 | |
1263 | if (sb->level == LEVEL_MULTIPATH) | |
1264 | rdev->desc_nr = -1; | |
1265 | else | |
1266 | rdev->desc_nr = sb->this_disk.number; | |
1267 | ||
228fc7d7 YY |
1268 | /* not spare disk, or LEVEL_MULTIPATH */ |
1269 | if (sb->level == LEVEL_MULTIPATH || | |
1270 | (rdev->desc_nr >= 0 && | |
3b7436cc | 1271 | rdev->desc_nr < MD_SB_DISKS && |
228fc7d7 YY |
1272 | sb->disks[rdev->desc_nr].state & |
1273 | ((1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE)))) | |
1274 | spare_disk = false; | |
1275 | ||
9a7b2b0f | 1276 | if (!refdev) { |
228fc7d7 | 1277 | if (!spare_disk) |
6a5cb53a YY |
1278 | ret = 1; |
1279 | else | |
1280 | ret = 0; | |
9a7b2b0f | 1281 | } else { |
1da177e4 | 1282 | __u64 ev1, ev2; |
65a06f06 | 1283 | mdp_super_t *refsb = page_address(refdev->sb_page); |
e6fd2093 | 1284 | if (!md_uuid_equal(refsb, sb)) { |
9d48739e | 1285 | pr_warn("md: %s has different UUID to %s\n", |
1da177e4 LT |
1286 | b, bdevname(refdev->bdev,b2)); |
1287 | goto abort; | |
1288 | } | |
e6fd2093 | 1289 | if (!md_sb_equal(refsb, sb)) { |
9d48739e N |
1290 | pr_warn("md: %s has same UUID but different superblock to %s\n", |
1291 | b, bdevname(refdev->bdev, b2)); | |
1da177e4 LT |
1292 | goto abort; |
1293 | } | |
1294 | ev1 = md_event(sb); | |
1295 | ev2 = md_event(refsb); | |
6a5cb53a | 1296 | |
228fc7d7 | 1297 | if (!spare_disk && ev1 > ev2) |
1da177e4 | 1298 | ret = 1; |
f72ffdd6 | 1299 | else |
1da177e4 LT |
1300 | ret = 0; |
1301 | } | |
8190e754 | 1302 | rdev->sectors = rdev->sb_start; |
667a5313 N |
1303 | /* Limit to 4TB as metadata cannot record more than that. |
1304 | * (not needed for Linear and RAID0 as metadata doesn't | |
1305 | * record this size) | |
1306 | */ | |
72deb455 | 1307 | if ((u64)rdev->sectors >= (2ULL << 32) && sb->level >= 1) |
3312c951 | 1308 | rdev->sectors = (sector_t)(2ULL << 32) - 2; |
1da177e4 | 1309 | |
27a7b260 | 1310 | if (rdev->sectors < ((sector_t)sb->size) * 2 && sb->level >= 1) |
2bf071bf N |
1311 | /* "this cannot possibly happen" ... */ |
1312 | ret = -EINVAL; | |
1313 | ||
1da177e4 LT |
1314 | abort: |
1315 | return ret; | |
1316 | } | |
1317 | ||
1318 | /* | |
1319 | * validate_super for 0.90.0 | |
1320 | */ | |
fd01b88c | 1321 | static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1322 | { |
1323 | mdp_disk_t *desc; | |
65a06f06 | 1324 | mdp_super_t *sb = page_address(rdev->sb_page); |
07d84d10 | 1325 | __u64 ev1 = md_event(sb); |
1da177e4 | 1326 | |
41158c7e | 1327 | rdev->raid_disk = -1; |
c5d79adb N |
1328 | clear_bit(Faulty, &rdev->flags); |
1329 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1330 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1331 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1332 | |
1da177e4 LT |
1333 | if (mddev->raid_disks == 0) { |
1334 | mddev->major_version = 0; | |
1335 | mddev->minor_version = sb->minor_version; | |
1336 | mddev->patch_version = sb->patch_version; | |
e691063a | 1337 | mddev->external = 0; |
9d8f0363 | 1338 | mddev->chunk_sectors = sb->chunk_size >> 9; |
1da177e4 LT |
1339 | mddev->ctime = sb->ctime; |
1340 | mddev->utime = sb->utime; | |
1341 | mddev->level = sb->level; | |
d9d166c2 | 1342 | mddev->clevel[0] = 0; |
1da177e4 LT |
1343 | mddev->layout = sb->layout; |
1344 | mddev->raid_disks = sb->raid_disks; | |
27a7b260 | 1345 | mddev->dev_sectors = ((sector_t)sb->size) * 2; |
07d84d10 | 1346 | mddev->events = ev1; |
c3d9714e | 1347 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1348 | mddev->bitmap_info.space = 0; |
1349 | /* bitmap can use 60 K after the 4K superblocks */ | |
c3d9714e | 1350 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 1351 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
2c810cdd | 1352 | mddev->reshape_backwards = 0; |
1da177e4 | 1353 | |
f6705578 N |
1354 | if (mddev->minor_version >= 91) { |
1355 | mddev->reshape_position = sb->reshape_position; | |
1356 | mddev->delta_disks = sb->delta_disks; | |
1357 | mddev->new_level = sb->new_level; | |
1358 | mddev->new_layout = sb->new_layout; | |
664e7c41 | 1359 | mddev->new_chunk_sectors = sb->new_chunk >> 9; |
2c810cdd N |
1360 | if (mddev->delta_disks < 0) |
1361 | mddev->reshape_backwards = 1; | |
f6705578 N |
1362 | } else { |
1363 | mddev->reshape_position = MaxSector; | |
1364 | mddev->delta_disks = 0; | |
1365 | mddev->new_level = mddev->level; | |
1366 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1367 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 | 1368 | } |
33f2c35a N |
1369 | if (mddev->level == 0) |
1370 | mddev->layout = -1; | |
f6705578 | 1371 | |
1da177e4 LT |
1372 | if (sb->state & (1<<MD_SB_CLEAN)) |
1373 | mddev->recovery_cp = MaxSector; | |
1374 | else { | |
f72ffdd6 | 1375 | if (sb->events_hi == sb->cp_events_hi && |
1da177e4 LT |
1376 | sb->events_lo == sb->cp_events_lo) { |
1377 | mddev->recovery_cp = sb->recovery_cp; | |
1378 | } else | |
1379 | mddev->recovery_cp = 0; | |
1380 | } | |
1381 | ||
1382 | memcpy(mddev->uuid+0, &sb->set_uuid0, 4); | |
1383 | memcpy(mddev->uuid+4, &sb->set_uuid1, 4); | |
1384 | memcpy(mddev->uuid+8, &sb->set_uuid2, 4); | |
1385 | memcpy(mddev->uuid+12,&sb->set_uuid3, 4); | |
1386 | ||
1387 | mddev->max_disks = MD_SB_DISKS; | |
a654b9d8 N |
1388 | |
1389 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT) && | |
6409bb05 | 1390 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1391 | mddev->bitmap_info.offset = |
1392 | mddev->bitmap_info.default_offset; | |
6409bb05 | 1393 | mddev->bitmap_info.space = |
c9ad020f | 1394 | mddev->bitmap_info.default_space; |
6409bb05 | 1395 | } |
a654b9d8 | 1396 | |
41158c7e | 1397 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1398 | /* Insist on good event counter while assembling, except |
1399 | * for spares (which don't need an event count) */ | |
1da177e4 | 1400 | ++ev1; |
be6800a7 N |
1401 | if (sb->disks[rdev->desc_nr].state & ( |
1402 | (1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE))) | |
f72ffdd6 | 1403 | if (ev1 < mddev->events) |
be6800a7 | 1404 | return -EINVAL; |
41158c7e N |
1405 | } else if (mddev->bitmap) { |
1406 | /* if adding to array with a bitmap, then we can accept an | |
1407 | * older device ... but not too old. | |
1408 | */ | |
41158c7e N |
1409 | if (ev1 < mddev->bitmap->events_cleared) |
1410 | return 0; | |
8313b8e5 N |
1411 | if (ev1 < mddev->events) |
1412 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1413 | } else { |
1414 | if (ev1 < mddev->events) | |
1415 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1416 | return 0; | |
1417 | } | |
41158c7e | 1418 | |
1da177e4 | 1419 | if (mddev->level != LEVEL_MULTIPATH) { |
1da177e4 LT |
1420 | desc = sb->disks + rdev->desc_nr; |
1421 | ||
1422 | if (desc->state & (1<<MD_DISK_FAULTY)) | |
b2d444d7 | 1423 | set_bit(Faulty, &rdev->flags); |
7c7546cc N |
1424 | else if (desc->state & (1<<MD_DISK_SYNC) /* && |
1425 | desc->raid_disk < mddev->raid_disks */) { | |
b2d444d7 | 1426 | set_bit(In_sync, &rdev->flags); |
1da177e4 | 1427 | rdev->raid_disk = desc->raid_disk; |
f466722c | 1428 | rdev->saved_raid_disk = desc->raid_disk; |
0261cd9f N |
1429 | } else if (desc->state & (1<<MD_DISK_ACTIVE)) { |
1430 | /* active but not in sync implies recovery up to | |
1431 | * reshape position. We don't know exactly where | |
1432 | * that is, so set to zero for now */ | |
1433 | if (mddev->minor_version >= 91) { | |
1434 | rdev->recovery_offset = 0; | |
1435 | rdev->raid_disk = desc->raid_disk; | |
1436 | } | |
1da177e4 | 1437 | } |
8ddf9efe N |
1438 | if (desc->state & (1<<MD_DISK_WRITEMOSTLY)) |
1439 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1440 | if (desc->state & (1<<MD_DISK_FAILFAST)) |
1441 | set_bit(FailFast, &rdev->flags); | |
41158c7e | 1442 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1443 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1444 | return 0; |
1445 | } | |
1446 | ||
1447 | /* | |
1448 | * sync_super for 0.90.0 | |
1449 | */ | |
fd01b88c | 1450 | static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1451 | { |
1452 | mdp_super_t *sb; | |
3cb03002 | 1453 | struct md_rdev *rdev2; |
1da177e4 | 1454 | int next_spare = mddev->raid_disks; |
19133a42 | 1455 | |
1da177e4 LT |
1456 | /* make rdev->sb match mddev data.. |
1457 | * | |
1458 | * 1/ zero out disks | |
1459 | * 2/ Add info for each disk, keeping track of highest desc_nr (next_spare); | |
1460 | * 3/ any empty disks < next_spare become removed | |
1461 | * | |
1462 | * disks[0] gets initialised to REMOVED because | |
1463 | * we cannot be sure from other fields if it has | |
1464 | * been initialised or not. | |
1465 | */ | |
1466 | int i; | |
1467 | int active=0, working=0,failed=0,spare=0,nr_disks=0; | |
1468 | ||
61181565 N |
1469 | rdev->sb_size = MD_SB_BYTES; |
1470 | ||
65a06f06 | 1471 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1472 | |
1473 | memset(sb, 0, sizeof(*sb)); | |
1474 | ||
1475 | sb->md_magic = MD_SB_MAGIC; | |
1476 | sb->major_version = mddev->major_version; | |
1da177e4 LT |
1477 | sb->patch_version = mddev->patch_version; |
1478 | sb->gvalid_words = 0; /* ignored */ | |
1479 | memcpy(&sb->set_uuid0, mddev->uuid+0, 4); | |
1480 | memcpy(&sb->set_uuid1, mddev->uuid+4, 4); | |
1481 | memcpy(&sb->set_uuid2, mddev->uuid+8, 4); | |
1482 | memcpy(&sb->set_uuid3, mddev->uuid+12,4); | |
1483 | ||
9ebc6ef1 | 1484 | sb->ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 1485 | sb->level = mddev->level; |
58c0fed4 | 1486 | sb->size = mddev->dev_sectors / 2; |
1da177e4 LT |
1487 | sb->raid_disks = mddev->raid_disks; |
1488 | sb->md_minor = mddev->md_minor; | |
e691063a | 1489 | sb->not_persistent = 0; |
9ebc6ef1 | 1490 | sb->utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
1491 | sb->state = 0; |
1492 | sb->events_hi = (mddev->events>>32); | |
1493 | sb->events_lo = (u32)mddev->events; | |
1494 | ||
f6705578 N |
1495 | if (mddev->reshape_position == MaxSector) |
1496 | sb->minor_version = 90; | |
1497 | else { | |
1498 | sb->minor_version = 91; | |
1499 | sb->reshape_position = mddev->reshape_position; | |
1500 | sb->new_level = mddev->new_level; | |
1501 | sb->delta_disks = mddev->delta_disks; | |
1502 | sb->new_layout = mddev->new_layout; | |
664e7c41 | 1503 | sb->new_chunk = mddev->new_chunk_sectors << 9; |
f6705578 N |
1504 | } |
1505 | mddev->minor_version = sb->minor_version; | |
1da177e4 LT |
1506 | if (mddev->in_sync) |
1507 | { | |
1508 | sb->recovery_cp = mddev->recovery_cp; | |
1509 | sb->cp_events_hi = (mddev->events>>32); | |
1510 | sb->cp_events_lo = (u32)mddev->events; | |
1511 | if (mddev->recovery_cp == MaxSector) | |
1512 | sb->state = (1<< MD_SB_CLEAN); | |
1513 | } else | |
1514 | sb->recovery_cp = 0; | |
1515 | ||
1516 | sb->layout = mddev->layout; | |
9d8f0363 | 1517 | sb->chunk_size = mddev->chunk_sectors << 9; |
1da177e4 | 1518 | |
c3d9714e | 1519 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) |
a654b9d8 N |
1520 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); |
1521 | ||
1da177e4 | 1522 | sb->disks[0].state = (1<<MD_DISK_REMOVED); |
dafb20fa | 1523 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1524 | mdp_disk_t *d; |
86e6ffdd | 1525 | int desc_nr; |
0261cd9f N |
1526 | int is_active = test_bit(In_sync, &rdev2->flags); |
1527 | ||
1528 | if (rdev2->raid_disk >= 0 && | |
1529 | sb->minor_version >= 91) | |
1530 | /* we have nowhere to store the recovery_offset, | |
1531 | * but if it is not below the reshape_position, | |
1532 | * we can piggy-back on that. | |
1533 | */ | |
1534 | is_active = 1; | |
1535 | if (rdev2->raid_disk < 0 || | |
1536 | test_bit(Faulty, &rdev2->flags)) | |
1537 | is_active = 0; | |
1538 | if (is_active) | |
86e6ffdd | 1539 | desc_nr = rdev2->raid_disk; |
1da177e4 | 1540 | else |
86e6ffdd | 1541 | desc_nr = next_spare++; |
19133a42 | 1542 | rdev2->desc_nr = desc_nr; |
1da177e4 LT |
1543 | d = &sb->disks[rdev2->desc_nr]; |
1544 | nr_disks++; | |
1545 | d->number = rdev2->desc_nr; | |
1546 | d->major = MAJOR(rdev2->bdev->bd_dev); | |
1547 | d->minor = MINOR(rdev2->bdev->bd_dev); | |
0261cd9f | 1548 | if (is_active) |
1da177e4 LT |
1549 | d->raid_disk = rdev2->raid_disk; |
1550 | else | |
1551 | d->raid_disk = rdev2->desc_nr; /* compatibility */ | |
1be7892f | 1552 | if (test_bit(Faulty, &rdev2->flags)) |
1da177e4 | 1553 | d->state = (1<<MD_DISK_FAULTY); |
0261cd9f | 1554 | else if (is_active) { |
1da177e4 | 1555 | d->state = (1<<MD_DISK_ACTIVE); |
0261cd9f N |
1556 | if (test_bit(In_sync, &rdev2->flags)) |
1557 | d->state |= (1<<MD_DISK_SYNC); | |
1da177e4 LT |
1558 | active++; |
1559 | working++; | |
1560 | } else { | |
1561 | d->state = 0; | |
1562 | spare++; | |
1563 | working++; | |
1564 | } | |
8ddf9efe N |
1565 | if (test_bit(WriteMostly, &rdev2->flags)) |
1566 | d->state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
1567 | if (test_bit(FailFast, &rdev2->flags)) |
1568 | d->state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 | 1569 | } |
1da177e4 LT |
1570 | /* now set the "removed" and "faulty" bits on any missing devices */ |
1571 | for (i=0 ; i < mddev->raid_disks ; i++) { | |
1572 | mdp_disk_t *d = &sb->disks[i]; | |
1573 | if (d->state == 0 && d->number == 0) { | |
1574 | d->number = i; | |
1575 | d->raid_disk = i; | |
1576 | d->state = (1<<MD_DISK_REMOVED); | |
1577 | d->state |= (1<<MD_DISK_FAULTY); | |
1578 | failed++; | |
1579 | } | |
1580 | } | |
1581 | sb->nr_disks = nr_disks; | |
1582 | sb->active_disks = active; | |
1583 | sb->working_disks = working; | |
1584 | sb->failed_disks = failed; | |
1585 | sb->spare_disks = spare; | |
1586 | ||
1587 | sb->this_disk = sb->disks[rdev->desc_nr]; | |
1588 | sb->sb_csum = calc_sb_csum(sb); | |
1589 | } | |
1590 | ||
0cd17fec CW |
1591 | /* |
1592 | * rdev_size_change for 0.90.0 | |
1593 | */ | |
1594 | static unsigned long long | |
3cb03002 | 1595 | super_90_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec | 1596 | { |
58c0fed4 | 1597 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1598 | return 0; /* component must fit device */ |
c3d9714e | 1599 | if (rdev->mddev->bitmap_info.offset) |
0cd17fec | 1600 | return 0; /* can't move bitmap */ |
57b2caa3 | 1601 | rdev->sb_start = calc_dev_sboffset(rdev); |
15f4a5fd AN |
1602 | if (!num_sectors || num_sectors > rdev->sb_start) |
1603 | num_sectors = rdev->sb_start; | |
27a7b260 N |
1604 | /* Limit to 4TB as metadata cannot record more than that. |
1605 | * 4TB == 2^32 KB, or 2*2^32 sectors. | |
1606 | */ | |
72deb455 | 1607 | if ((u64)num_sectors >= (2ULL << 32) && rdev->mddev->level >= 1) |
3312c951 | 1608 | num_sectors = (sector_t)(2ULL << 32) - 2; |
46533ff7 N |
1609 | do { |
1610 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
0cd17fec | 1611 | rdev->sb_page); |
46533ff7 | 1612 | } while (md_super_wait(rdev->mddev) < 0); |
c26a44ed | 1613 | return num_sectors; |
0cd17fec CW |
1614 | } |
1615 | ||
c6563a8c N |
1616 | static int |
1617 | super_90_allow_new_offset(struct md_rdev *rdev, unsigned long long new_offset) | |
1618 | { | |
1619 | /* non-zero offset changes not possible with v0.90 */ | |
1620 | return new_offset == 0; | |
1621 | } | |
0cd17fec | 1622 | |
1da177e4 LT |
1623 | /* |
1624 | * version 1 superblock | |
1625 | */ | |
1626 | ||
f72ffdd6 | 1627 | static __le32 calc_sb_1_csum(struct mdp_superblock_1 *sb) |
1da177e4 | 1628 | { |
1c05b4bc N |
1629 | __le32 disk_csum; |
1630 | u32 csum; | |
1da177e4 LT |
1631 | unsigned long long newcsum; |
1632 | int size = 256 + le32_to_cpu(sb->max_dev)*2; | |
1c05b4bc | 1633 | __le32 *isuper = (__le32*)sb; |
1da177e4 LT |
1634 | |
1635 | disk_csum = sb->sb_csum; | |
1636 | sb->sb_csum = 0; | |
1637 | newcsum = 0; | |
1f3c9907 | 1638 | for (; size >= 4; size -= 4) |
1da177e4 LT |
1639 | newcsum += le32_to_cpu(*isuper++); |
1640 | ||
1641 | if (size == 2) | |
1c05b4bc | 1642 | newcsum += le16_to_cpu(*(__le16*) isuper); |
1da177e4 LT |
1643 | |
1644 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
1645 | sb->sb_csum = disk_csum; | |
1646 | return cpu_to_le32(csum); | |
1647 | } | |
1648 | ||
3cb03002 | 1649 | static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1650 | { |
1651 | struct mdp_superblock_1 *sb; | |
1652 | int ret; | |
0f420358 | 1653 | sector_t sb_start; |
c6563a8c | 1654 | sector_t sectors; |
1da177e4 | 1655 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; |
0002b271 | 1656 | int bmask; |
228fc7d7 | 1657 | bool spare_disk = true; |
1da177e4 LT |
1658 | |
1659 | /* | |
0f420358 | 1660 | * Calculate the position of the superblock in 512byte sectors. |
1da177e4 LT |
1661 | * It is always aligned to a 4K boundary and |
1662 | * depeding on minor_version, it can be: | |
1663 | * 0: At least 8K, but less than 12K, from end of device | |
1664 | * 1: At start of device | |
1665 | * 2: 4K from start of device. | |
1666 | */ | |
1667 | switch(minor_version) { | |
1668 | case 0: | |
77304d2a | 1669 | sb_start = i_size_read(rdev->bdev->bd_inode) >> 9; |
0f420358 AN |
1670 | sb_start -= 8*2; |
1671 | sb_start &= ~(sector_t)(4*2-1); | |
1da177e4 LT |
1672 | break; |
1673 | case 1: | |
0f420358 | 1674 | sb_start = 0; |
1da177e4 LT |
1675 | break; |
1676 | case 2: | |
0f420358 | 1677 | sb_start = 8; |
1da177e4 LT |
1678 | break; |
1679 | default: | |
1680 | return -EINVAL; | |
1681 | } | |
0f420358 | 1682 | rdev->sb_start = sb_start; |
1da177e4 | 1683 | |
0002b271 N |
1684 | /* superblock is rarely larger than 1K, but it can be larger, |
1685 | * and it is safe to read 4k, so we do that | |
1686 | */ | |
1687 | ret = read_disk_sb(rdev, 4096); | |
1da177e4 LT |
1688 | if (ret) return ret; |
1689 | ||
65a06f06 | 1690 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1691 | |
1692 | if (sb->magic != cpu_to_le32(MD_SB_MAGIC) || | |
1693 | sb->major_version != cpu_to_le32(1) || | |
1694 | le32_to_cpu(sb->max_dev) > (4096-256)/2 || | |
0f420358 | 1695 | le64_to_cpu(sb->super_offset) != rdev->sb_start || |
71c0805c | 1696 | (le32_to_cpu(sb->feature_map) & ~MD_FEATURE_ALL) != 0) |
1da177e4 LT |
1697 | return -EINVAL; |
1698 | ||
1699 | if (calc_sb_1_csum(sb) != sb->sb_csum) { | |
9d48739e | 1700 | pr_warn("md: invalid superblock checksum on %s\n", |
1da177e4 LT |
1701 | bdevname(rdev->bdev,b)); |
1702 | return -EINVAL; | |
1703 | } | |
1704 | if (le64_to_cpu(sb->data_size) < 10) { | |
9d48739e N |
1705 | pr_warn("md: data_size too small on %s\n", |
1706 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
1707 | return -EINVAL; |
1708 | } | |
c6563a8c N |
1709 | if (sb->pad0 || |
1710 | sb->pad3[0] || | |
1711 | memcmp(sb->pad3, sb->pad3+1, sizeof(sb->pad3) - sizeof(sb->pad3[1]))) | |
1712 | /* Some padding is non-zero, might be a new feature */ | |
1713 | return -EINVAL; | |
e11e93fa | 1714 | |
1da177e4 LT |
1715 | rdev->preferred_minor = 0xffff; |
1716 | rdev->data_offset = le64_to_cpu(sb->data_offset); | |
c6563a8c N |
1717 | rdev->new_data_offset = rdev->data_offset; |
1718 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE) && | |
1719 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) | |
1720 | rdev->new_data_offset += (s32)le32_to_cpu(sb->new_offset); | |
4dbcdc75 | 1721 | atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read)); |
1da177e4 | 1722 | |
0002b271 | 1723 | rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256; |
e1defc4f | 1724 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; |
0002b271 | 1725 | if (rdev->sb_size & bmask) |
a1801f85 N |
1726 | rdev->sb_size = (rdev->sb_size | bmask) + 1; |
1727 | ||
1728 | if (minor_version | |
0f420358 | 1729 | && rdev->data_offset < sb_start + (rdev->sb_size/512)) |
a1801f85 | 1730 | return -EINVAL; |
c6563a8c N |
1731 | if (minor_version |
1732 | && rdev->new_data_offset < sb_start + (rdev->sb_size/512)) | |
1733 | return -EINVAL; | |
0002b271 | 1734 | |
31b65a0d N |
1735 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH)) |
1736 | rdev->desc_nr = -1; | |
1737 | else | |
1738 | rdev->desc_nr = le32_to_cpu(sb->dev_number); | |
1739 | ||
2699b672 N |
1740 | if (!rdev->bb_page) { |
1741 | rdev->bb_page = alloc_page(GFP_KERNEL); | |
1742 | if (!rdev->bb_page) | |
1743 | return -ENOMEM; | |
1744 | } | |
1745 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BAD_BLOCKS) && | |
1746 | rdev->badblocks.count == 0) { | |
1747 | /* need to load the bad block list. | |
1748 | * Currently we limit it to one page. | |
1749 | */ | |
1750 | s32 offset; | |
1751 | sector_t bb_sector; | |
00485d09 | 1752 | __le64 *bbp; |
2699b672 N |
1753 | int i; |
1754 | int sectors = le16_to_cpu(sb->bblog_size); | |
1755 | if (sectors > (PAGE_SIZE / 512)) | |
1756 | return -EINVAL; | |
1757 | offset = le32_to_cpu(sb->bblog_offset); | |
1758 | if (offset == 0) | |
1759 | return -EINVAL; | |
1760 | bb_sector = (long long)offset; | |
1761 | if (!sync_page_io(rdev, bb_sector, sectors << 9, | |
796a5cf0 | 1762 | rdev->bb_page, REQ_OP_READ, 0, true)) |
2699b672 | 1763 | return -EIO; |
00485d09 | 1764 | bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
1765 | rdev->badblocks.shift = sb->bblog_shift; |
1766 | for (i = 0 ; i < (sectors << (9-3)) ; i++, bbp++) { | |
1767 | u64 bb = le64_to_cpu(*bbp); | |
1768 | int count = bb & (0x3ff); | |
1769 | u64 sector = bb >> 10; | |
1770 | sector <<= sb->bblog_shift; | |
1771 | count <<= sb->bblog_shift; | |
1772 | if (bb + 1 == 0) | |
1773 | break; | |
fc974ee2 | 1774 | if (badblocks_set(&rdev->badblocks, sector, count, 1)) |
2699b672 N |
1775 | return -EINVAL; |
1776 | } | |
486adf72 N |
1777 | } else if (sb->bblog_offset != 0) |
1778 | rdev->badblocks.shift = 0; | |
2699b672 | 1779 | |
ddc08823 PB |
1780 | if ((le32_to_cpu(sb->feature_map) & |
1781 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS))) { | |
ea0213e0 AP |
1782 | rdev->ppl.offset = (__s16)le16_to_cpu(sb->ppl.offset); |
1783 | rdev->ppl.size = le16_to_cpu(sb->ppl.size); | |
1784 | rdev->ppl.sector = rdev->sb_start + rdev->ppl.offset; | |
1785 | } | |
1786 | ||
33f2c35a N |
1787 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT) && |
1788 | sb->level != 0) | |
1789 | return -EINVAL; | |
1790 | ||
228fc7d7 YY |
1791 | /* not spare disk, or LEVEL_MULTIPATH */ |
1792 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH) || | |
1793 | (rdev->desc_nr >= 0 && | |
1794 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
1795 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || | |
1796 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL))) | |
1797 | spare_disk = false; | |
6a5cb53a | 1798 | |
9a7b2b0f | 1799 | if (!refdev) { |
228fc7d7 | 1800 | if (!spare_disk) |
6a5cb53a YY |
1801 | ret = 1; |
1802 | else | |
1803 | ret = 0; | |
9a7b2b0f | 1804 | } else { |
1da177e4 | 1805 | __u64 ev1, ev2; |
65a06f06 | 1806 | struct mdp_superblock_1 *refsb = page_address(refdev->sb_page); |
1da177e4 LT |
1807 | |
1808 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16) != 0 || | |
1809 | sb->level != refsb->level || | |
1810 | sb->layout != refsb->layout || | |
1811 | sb->chunksize != refsb->chunksize) { | |
9d48739e | 1812 | pr_warn("md: %s has strangely different superblock to %s\n", |
1da177e4 LT |
1813 | bdevname(rdev->bdev,b), |
1814 | bdevname(refdev->bdev,b2)); | |
1815 | return -EINVAL; | |
1816 | } | |
1817 | ev1 = le64_to_cpu(sb->events); | |
1818 | ev2 = le64_to_cpu(refsb->events); | |
1819 | ||
228fc7d7 | 1820 | if (!spare_disk && ev1 > ev2) |
8ed75463 N |
1821 | ret = 1; |
1822 | else | |
1823 | ret = 0; | |
1da177e4 | 1824 | } |
c6563a8c N |
1825 | if (minor_version) { |
1826 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9); | |
1827 | sectors -= rdev->data_offset; | |
1828 | } else | |
1829 | sectors = rdev->sb_start; | |
1830 | if (sectors < le64_to_cpu(sb->data_size)) | |
1da177e4 | 1831 | return -EINVAL; |
dd8ac336 | 1832 | rdev->sectors = le64_to_cpu(sb->data_size); |
8ed75463 | 1833 | return ret; |
1da177e4 LT |
1834 | } |
1835 | ||
fd01b88c | 1836 | static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 1837 | { |
65a06f06 | 1838 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
07d84d10 | 1839 | __u64 ev1 = le64_to_cpu(sb->events); |
1da177e4 | 1840 | |
41158c7e | 1841 | rdev->raid_disk = -1; |
c5d79adb N |
1842 | clear_bit(Faulty, &rdev->flags); |
1843 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1844 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1845 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1846 | |
1da177e4 LT |
1847 | if (mddev->raid_disks == 0) { |
1848 | mddev->major_version = 1; | |
1849 | mddev->patch_version = 0; | |
e691063a | 1850 | mddev->external = 0; |
9d8f0363 | 1851 | mddev->chunk_sectors = le32_to_cpu(sb->chunksize); |
9ebc6ef1 DD |
1852 | mddev->ctime = le64_to_cpu(sb->ctime); |
1853 | mddev->utime = le64_to_cpu(sb->utime); | |
1da177e4 | 1854 | mddev->level = le32_to_cpu(sb->level); |
d9d166c2 | 1855 | mddev->clevel[0] = 0; |
1da177e4 LT |
1856 | mddev->layout = le32_to_cpu(sb->layout); |
1857 | mddev->raid_disks = le32_to_cpu(sb->raid_disks); | |
58c0fed4 | 1858 | mddev->dev_sectors = le64_to_cpu(sb->size); |
07d84d10 | 1859 | mddev->events = ev1; |
c3d9714e | 1860 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1861 | mddev->bitmap_info.space = 0; |
1862 | /* Default location for bitmap is 1K after superblock | |
1863 | * using 3K - total of 4K | |
1864 | */ | |
c3d9714e | 1865 | mddev->bitmap_info.default_offset = 1024 >> 9; |
6409bb05 | 1866 | mddev->bitmap_info.default_space = (4096-1024) >> 9; |
2c810cdd N |
1867 | mddev->reshape_backwards = 0; |
1868 | ||
1da177e4 LT |
1869 | mddev->recovery_cp = le64_to_cpu(sb->resync_offset); |
1870 | memcpy(mddev->uuid, sb->set_uuid, 16); | |
1871 | ||
1872 | mddev->max_disks = (4096-256)/2; | |
a654b9d8 | 1873 | |
71c0805c | 1874 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) && |
6409bb05 | 1875 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1876 | mddev->bitmap_info.offset = |
1877 | (__s32)le32_to_cpu(sb->bitmap_offset); | |
6409bb05 N |
1878 | /* Metadata doesn't record how much space is available. |
1879 | * For 1.0, we assume we can use up to the superblock | |
1880 | * if before, else to 4K beyond superblock. | |
1881 | * For others, assume no change is possible. | |
1882 | */ | |
1883 | if (mddev->minor_version > 0) | |
1884 | mddev->bitmap_info.space = 0; | |
1885 | else if (mddev->bitmap_info.offset > 0) | |
1886 | mddev->bitmap_info.space = | |
1887 | 8 - mddev->bitmap_info.offset; | |
1888 | else | |
1889 | mddev->bitmap_info.space = | |
1890 | -mddev->bitmap_info.offset; | |
1891 | } | |
e11e93fa | 1892 | |
f6705578 N |
1893 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { |
1894 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); | |
1895 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); | |
1896 | mddev->new_level = le32_to_cpu(sb->new_level); | |
1897 | mddev->new_layout = le32_to_cpu(sb->new_layout); | |
664e7c41 | 1898 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_chunk); |
2c810cdd N |
1899 | if (mddev->delta_disks < 0 || |
1900 | (mddev->delta_disks == 0 && | |
1901 | (le32_to_cpu(sb->feature_map) | |
1902 | & MD_FEATURE_RESHAPE_BACKWARDS))) | |
1903 | mddev->reshape_backwards = 1; | |
f6705578 N |
1904 | } else { |
1905 | mddev->reshape_position = MaxSector; | |
1906 | mddev->delta_disks = 0; | |
1907 | mddev->new_level = mddev->level; | |
1908 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1909 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1910 | } |
1911 | ||
33f2c35a N |
1912 | if (mddev->level == 0 && |
1913 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT)) | |
1914 | mddev->layout = -1; | |
1915 | ||
486b0f7b | 1916 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL) |
a62ab49e | 1917 | set_bit(MD_HAS_JOURNAL, &mddev->flags); |
ea0213e0 | 1918 | |
ddc08823 PB |
1919 | if (le32_to_cpu(sb->feature_map) & |
1920 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS)) { | |
ea0213e0 AP |
1921 | if (le32_to_cpu(sb->feature_map) & |
1922 | (MD_FEATURE_BITMAP_OFFSET | MD_FEATURE_JOURNAL)) | |
1923 | return -EINVAL; | |
ddc08823 PB |
1924 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_PPL) && |
1925 | (le32_to_cpu(sb->feature_map) & | |
1926 | MD_FEATURE_MULTIPLE_PPLS)) | |
1927 | return -EINVAL; | |
ea0213e0 AP |
1928 | set_bit(MD_HAS_PPL, &mddev->flags); |
1929 | } | |
41158c7e | 1930 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1931 | /* Insist of good event counter while assembling, except for |
1932 | * spares (which don't need an event count) */ | |
1da177e4 | 1933 | ++ev1; |
be6800a7 N |
1934 | if (rdev->desc_nr >= 0 && |
1935 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
a3dfbdaa SL |
1936 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || |
1937 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL)) | |
be6800a7 N |
1938 | if (ev1 < mddev->events) |
1939 | return -EINVAL; | |
41158c7e N |
1940 | } else if (mddev->bitmap) { |
1941 | /* If adding to array with a bitmap, then we can accept an | |
1942 | * older device, but not too old. | |
1943 | */ | |
41158c7e N |
1944 | if (ev1 < mddev->bitmap->events_cleared) |
1945 | return 0; | |
8313b8e5 N |
1946 | if (ev1 < mddev->events) |
1947 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1948 | } else { |
1949 | if (ev1 < mddev->events) | |
1950 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1951 | return 0; | |
1952 | } | |
1da177e4 LT |
1953 | if (mddev->level != LEVEL_MULTIPATH) { |
1954 | int role; | |
3673f305 N |
1955 | if (rdev->desc_nr < 0 || |
1956 | rdev->desc_nr >= le32_to_cpu(sb->max_dev)) { | |
c4d4c91b | 1957 | role = MD_DISK_ROLE_SPARE; |
3673f305 N |
1958 | rdev->desc_nr = -1; |
1959 | } else | |
1960 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
1da177e4 | 1961 | switch(role) { |
c4d4c91b | 1962 | case MD_DISK_ROLE_SPARE: /* spare */ |
1da177e4 | 1963 | break; |
c4d4c91b | 1964 | case MD_DISK_ROLE_FAULTY: /* faulty */ |
b2d444d7 | 1965 | set_bit(Faulty, &rdev->flags); |
1da177e4 | 1966 | break; |
bac624f3 SL |
1967 | case MD_DISK_ROLE_JOURNAL: /* journal device */ |
1968 | if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL)) { | |
1969 | /* journal device without journal feature */ | |
9d48739e | 1970 | pr_warn("md: journal device provided without journal feature, ignoring the device\n"); |
bac624f3 SL |
1971 | return -EINVAL; |
1972 | } | |
1973 | set_bit(Journal, &rdev->flags); | |
3069aa8d | 1974 | rdev->journal_tail = le64_to_cpu(sb->journal_tail); |
9b15603d | 1975 | rdev->raid_disk = 0; |
bac624f3 | 1976 | break; |
1da177e4 | 1977 | default: |
f466722c | 1978 | rdev->saved_raid_disk = role; |
5fd6c1dc | 1979 | if ((le32_to_cpu(sb->feature_map) & |
f466722c | 1980 | MD_FEATURE_RECOVERY_OFFSET)) { |
5fd6c1dc | 1981 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); |
f466722c N |
1982 | if (!(le32_to_cpu(sb->feature_map) & |
1983 | MD_FEATURE_RECOVERY_BITMAP)) | |
1984 | rdev->saved_raid_disk = -1; | |
062f5b2a GJ |
1985 | } else { |
1986 | /* | |
1987 | * If the array is FROZEN, then the device can't | |
1988 | * be in_sync with rest of array. | |
1989 | */ | |
1990 | if (!test_bit(MD_RECOVERY_FROZEN, | |
1991 | &mddev->recovery)) | |
1992 | set_bit(In_sync, &rdev->flags); | |
1993 | } | |
1da177e4 LT |
1994 | rdev->raid_disk = role; |
1995 | break; | |
1996 | } | |
8ddf9efe N |
1997 | if (sb->devflags & WriteMostly1) |
1998 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1999 | if (sb->devflags & FailFast1) |
2000 | set_bit(FailFast, &rdev->flags); | |
2d78f8c4 N |
2001 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) |
2002 | set_bit(Replacement, &rdev->flags); | |
41158c7e | 2003 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 2004 | set_bit(In_sync, &rdev->flags); |
41158c7e | 2005 | |
1da177e4 LT |
2006 | return 0; |
2007 | } | |
2008 | ||
fd01b88c | 2009 | static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
2010 | { |
2011 | struct mdp_superblock_1 *sb; | |
3cb03002 | 2012 | struct md_rdev *rdev2; |
1da177e4 LT |
2013 | int max_dev, i; |
2014 | /* make rdev->sb match mddev and rdev data. */ | |
2015 | ||
65a06f06 | 2016 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
2017 | |
2018 | sb->feature_map = 0; | |
2019 | sb->pad0 = 0; | |
5fd6c1dc | 2020 | sb->recovery_offset = cpu_to_le64(0); |
1da177e4 LT |
2021 | memset(sb->pad3, 0, sizeof(sb->pad3)); |
2022 | ||
2023 | sb->utime = cpu_to_le64((__u64)mddev->utime); | |
2024 | sb->events = cpu_to_le64(mddev->events); | |
2025 | if (mddev->in_sync) | |
2026 | sb->resync_offset = cpu_to_le64(mddev->recovery_cp); | |
bd18f646 SL |
2027 | else if (test_bit(MD_JOURNAL_CLEAN, &mddev->flags)) |
2028 | sb->resync_offset = cpu_to_le64(MaxSector); | |
1da177e4 LT |
2029 | else |
2030 | sb->resync_offset = cpu_to_le64(0); | |
2031 | ||
1c05b4bc | 2032 | sb->cnt_corrected_read = cpu_to_le32(atomic_read(&rdev->corrected_errors)); |
4dbcdc75 | 2033 | |
f0ca340c | 2034 | sb->raid_disks = cpu_to_le32(mddev->raid_disks); |
58c0fed4 | 2035 | sb->size = cpu_to_le64(mddev->dev_sectors); |
9d8f0363 | 2036 | sb->chunksize = cpu_to_le32(mddev->chunk_sectors); |
62e1e389 N |
2037 | sb->level = cpu_to_le32(mddev->level); |
2038 | sb->layout = cpu_to_le32(mddev->layout); | |
688834e6 N |
2039 | if (test_bit(FailFast, &rdev->flags)) |
2040 | sb->devflags |= FailFast1; | |
2041 | else | |
2042 | sb->devflags &= ~FailFast1; | |
f0ca340c | 2043 | |
aeb9b211 N |
2044 | if (test_bit(WriteMostly, &rdev->flags)) |
2045 | sb->devflags |= WriteMostly1; | |
2046 | else | |
2047 | sb->devflags &= ~WriteMostly1; | |
c6563a8c N |
2048 | sb->data_offset = cpu_to_le64(rdev->data_offset); |
2049 | sb->data_size = cpu_to_le64(rdev->sectors); | |
aeb9b211 | 2050 | |
c3d9714e N |
2051 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) { |
2052 | sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset); | |
71c0805c | 2053 | sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); |
a654b9d8 | 2054 | } |
5fd6c1dc | 2055 | |
f2076e7d | 2056 | if (rdev->raid_disk >= 0 && !test_bit(Journal, &rdev->flags) && |
97e4f42d | 2057 | !test_bit(In_sync, &rdev->flags)) { |
93be75ff N |
2058 | sb->feature_map |= |
2059 | cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET); | |
2060 | sb->recovery_offset = | |
2061 | cpu_to_le64(rdev->recovery_offset); | |
f466722c N |
2062 | if (rdev->saved_raid_disk >= 0 && mddev->bitmap) |
2063 | sb->feature_map |= | |
2064 | cpu_to_le32(MD_FEATURE_RECOVERY_BITMAP); | |
5fd6c1dc | 2065 | } |
3069aa8d SL |
2066 | /* Note: recovery_offset and journal_tail share space */ |
2067 | if (test_bit(Journal, &rdev->flags)) | |
2068 | sb->journal_tail = cpu_to_le64(rdev->journal_tail); | |
2d78f8c4 N |
2069 | if (test_bit(Replacement, &rdev->flags)) |
2070 | sb->feature_map |= | |
2071 | cpu_to_le32(MD_FEATURE_REPLACEMENT); | |
5fd6c1dc | 2072 | |
f6705578 N |
2073 | if (mddev->reshape_position != MaxSector) { |
2074 | sb->feature_map |= cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); | |
2075 | sb->reshape_position = cpu_to_le64(mddev->reshape_position); | |
2076 | sb->new_layout = cpu_to_le32(mddev->new_layout); | |
2077 | sb->delta_disks = cpu_to_le32(mddev->delta_disks); | |
2078 | sb->new_level = cpu_to_le32(mddev->new_level); | |
664e7c41 | 2079 | sb->new_chunk = cpu_to_le32(mddev->new_chunk_sectors); |
2c810cdd N |
2080 | if (mddev->delta_disks == 0 && |
2081 | mddev->reshape_backwards) | |
2082 | sb->feature_map | |
2083 | |= cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS); | |
c6563a8c N |
2084 | if (rdev->new_data_offset != rdev->data_offset) { |
2085 | sb->feature_map | |
2086 | |= cpu_to_le32(MD_FEATURE_NEW_OFFSET); | |
2087 | sb->new_offset = cpu_to_le32((__u32)(rdev->new_data_offset | |
2088 | - rdev->data_offset)); | |
2089 | } | |
f6705578 | 2090 | } |
a654b9d8 | 2091 | |
3c462c88 GR |
2092 | if (mddev_is_clustered(mddev)) |
2093 | sb->feature_map |= cpu_to_le32(MD_FEATURE_CLUSTERED); | |
2094 | ||
2699b672 N |
2095 | if (rdev->badblocks.count == 0) |
2096 | /* Nothing to do for bad blocks*/ ; | |
2097 | else if (sb->bblog_offset == 0) | |
2098 | /* Cannot record bad blocks on this device */ | |
2099 | md_error(mddev, rdev); | |
2100 | else { | |
2101 | struct badblocks *bb = &rdev->badblocks; | |
ae50640b | 2102 | __le64 *bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
2103 | u64 *p = bb->page; |
2104 | sb->feature_map |= cpu_to_le32(MD_FEATURE_BAD_BLOCKS); | |
2105 | if (bb->changed) { | |
2106 | unsigned seq; | |
2107 | ||
2108 | retry: | |
2109 | seq = read_seqbegin(&bb->lock); | |
2110 | ||
2111 | memset(bbp, 0xff, PAGE_SIZE); | |
2112 | ||
2113 | for (i = 0 ; i < bb->count ; i++) { | |
35f9ac2d | 2114 | u64 internal_bb = p[i]; |
2699b672 N |
2115 | u64 store_bb = ((BB_OFFSET(internal_bb) << 10) |
2116 | | BB_LEN(internal_bb)); | |
35f9ac2d | 2117 | bbp[i] = cpu_to_le64(store_bb); |
2699b672 | 2118 | } |
d0962936 | 2119 | bb->changed = 0; |
2699b672 N |
2120 | if (read_seqretry(&bb->lock, seq)) |
2121 | goto retry; | |
2122 | ||
2123 | bb->sector = (rdev->sb_start + | |
2124 | (int)le32_to_cpu(sb->bblog_offset)); | |
2125 | bb->size = le16_to_cpu(sb->bblog_size); | |
2699b672 N |
2126 | } |
2127 | } | |
2128 | ||
1da177e4 | 2129 | max_dev = 0; |
dafb20fa | 2130 | rdev_for_each(rdev2, mddev) |
1da177e4 LT |
2131 | if (rdev2->desc_nr+1 > max_dev) |
2132 | max_dev = rdev2->desc_nr+1; | |
a778b73f | 2133 | |
70471daf N |
2134 | if (max_dev > le32_to_cpu(sb->max_dev)) { |
2135 | int bmask; | |
a778b73f | 2136 | sb->max_dev = cpu_to_le32(max_dev); |
70471daf N |
2137 | rdev->sb_size = max_dev * 2 + 256; |
2138 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; | |
2139 | if (rdev->sb_size & bmask) | |
2140 | rdev->sb_size = (rdev->sb_size | bmask) + 1; | |
ddcf3522 N |
2141 | } else |
2142 | max_dev = le32_to_cpu(sb->max_dev); | |
2143 | ||
1da177e4 | 2144 | for (i=0; i<max_dev;i++) |
8df72024 | 2145 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
f72ffdd6 | 2146 | |
a97b7896 SL |
2147 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) |
2148 | sb->feature_map |= cpu_to_le32(MD_FEATURE_JOURNAL); | |
f72ffdd6 | 2149 | |
ea0213e0 | 2150 | if (test_bit(MD_HAS_PPL, &mddev->flags)) { |
ddc08823 PB |
2151 | if (test_bit(MD_HAS_MULTIPLE_PPLS, &mddev->flags)) |
2152 | sb->feature_map |= | |
2153 | cpu_to_le32(MD_FEATURE_MULTIPLE_PPLS); | |
2154 | else | |
2155 | sb->feature_map |= cpu_to_le32(MD_FEATURE_PPL); | |
ea0213e0 AP |
2156 | sb->ppl.offset = cpu_to_le16(rdev->ppl.offset); |
2157 | sb->ppl.size = cpu_to_le16(rdev->ppl.size); | |
2158 | } | |
2159 | ||
dafb20fa | 2160 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 2161 | i = rdev2->desc_nr; |
b2d444d7 | 2162 | if (test_bit(Faulty, &rdev2->flags)) |
c4d4c91b | 2163 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY); |
b2d444d7 | 2164 | else if (test_bit(In_sync, &rdev2->flags)) |
1da177e4 | 2165 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
a97b7896 | 2166 | else if (test_bit(Journal, &rdev2->flags)) |
bac624f3 | 2167 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_JOURNAL); |
93be75ff | 2168 | else if (rdev2->raid_disk >= 0) |
5fd6c1dc | 2169 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
1da177e4 | 2170 | else |
c4d4c91b | 2171 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
1da177e4 LT |
2172 | } |
2173 | ||
1da177e4 LT |
2174 | sb->sb_csum = calc_sb_1_csum(sb); |
2175 | } | |
2176 | ||
d9c0fa50 XN |
2177 | static sector_t super_1_choose_bm_space(sector_t dev_size) |
2178 | { | |
2179 | sector_t bm_space; | |
2180 | ||
2181 | /* if the device is bigger than 8Gig, save 64k for bitmap | |
2182 | * usage, if bigger than 200Gig, save 128k | |
2183 | */ | |
2184 | if (dev_size < 64*2) | |
2185 | bm_space = 0; | |
2186 | else if (dev_size - 64*2 >= 200*1024*1024*2) | |
2187 | bm_space = 128*2; | |
2188 | else if (dev_size - 4*2 > 8*1024*1024*2) | |
2189 | bm_space = 64*2; | |
2190 | else | |
2191 | bm_space = 4*2; | |
2192 | return bm_space; | |
2193 | } | |
2194 | ||
0cd17fec | 2195 | static unsigned long long |
3cb03002 | 2196 | super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec CW |
2197 | { |
2198 | struct mdp_superblock_1 *sb; | |
15f4a5fd | 2199 | sector_t max_sectors; |
58c0fed4 | 2200 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 2201 | return 0; /* component must fit device */ |
c6563a8c N |
2202 | if (rdev->data_offset != rdev->new_data_offset) |
2203 | return 0; /* too confusing */ | |
0f420358 | 2204 | if (rdev->sb_start < rdev->data_offset) { |
0cd17fec | 2205 | /* minor versions 1 and 2; superblock before data */ |
77304d2a | 2206 | max_sectors = i_size_read(rdev->bdev->bd_inode) >> 9; |
15f4a5fd AN |
2207 | max_sectors -= rdev->data_offset; |
2208 | if (!num_sectors || num_sectors > max_sectors) | |
2209 | num_sectors = max_sectors; | |
c3d9714e | 2210 | } else if (rdev->mddev->bitmap_info.offset) { |
0cd17fec CW |
2211 | /* minor version 0 with bitmap we can't move */ |
2212 | return 0; | |
2213 | } else { | |
2214 | /* minor version 0; superblock after data */ | |
d9c0fa50 XN |
2215 | sector_t sb_start, bm_space; |
2216 | sector_t dev_size = i_size_read(rdev->bdev->bd_inode) >> 9; | |
2217 | ||
2218 | /* 8K is for superblock */ | |
2219 | sb_start = dev_size - 8*2; | |
0f420358 | 2220 | sb_start &= ~(sector_t)(4*2 - 1); |
d9c0fa50 XN |
2221 | |
2222 | bm_space = super_1_choose_bm_space(dev_size); | |
2223 | ||
2224 | /* Space that can be used to store date needs to decrease | |
2225 | * superblock bitmap space and bad block space(4K) | |
2226 | */ | |
2227 | max_sectors = sb_start - bm_space - 4*2; | |
2228 | ||
15f4a5fd AN |
2229 | if (!num_sectors || num_sectors > max_sectors) |
2230 | num_sectors = max_sectors; | |
0cd17fec | 2231 | } |
65a06f06 | 2232 | sb = page_address(rdev->sb_page); |
15f4a5fd | 2233 | sb->data_size = cpu_to_le64(num_sectors); |
3fb632e4 | 2234 | sb->super_offset = cpu_to_le64(rdev->sb_start); |
0cd17fec | 2235 | sb->sb_csum = calc_sb_1_csum(sb); |
46533ff7 N |
2236 | do { |
2237 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
2238 | rdev->sb_page); | |
2239 | } while (md_super_wait(rdev->mddev) < 0); | |
c26a44ed | 2240 | return num_sectors; |
c6563a8c N |
2241 | |
2242 | } | |
2243 | ||
2244 | static int | |
2245 | super_1_allow_new_offset(struct md_rdev *rdev, | |
2246 | unsigned long long new_offset) | |
2247 | { | |
2248 | /* All necessary checks on new >= old have been done */ | |
2249 | struct bitmap *bitmap; | |
2250 | if (new_offset >= rdev->data_offset) | |
2251 | return 1; | |
2252 | ||
2253 | /* with 1.0 metadata, there is no metadata to tread on | |
2254 | * so we can always move back */ | |
2255 | if (rdev->mddev->minor_version == 0) | |
2256 | return 1; | |
2257 | ||
2258 | /* otherwise we must be sure not to step on | |
2259 | * any metadata, so stay: | |
2260 | * 36K beyond start of superblock | |
2261 | * beyond end of badblocks | |
2262 | * beyond write-intent bitmap | |
2263 | */ | |
2264 | if (rdev->sb_start + (32+4)*2 > new_offset) | |
2265 | return 0; | |
2266 | bitmap = rdev->mddev->bitmap; | |
2267 | if (bitmap && !rdev->mddev->bitmap_info.file && | |
2268 | rdev->sb_start + rdev->mddev->bitmap_info.offset + | |
1ec885cd | 2269 | bitmap->storage.file_pages * (PAGE_SIZE>>9) > new_offset) |
c6563a8c N |
2270 | return 0; |
2271 | if (rdev->badblocks.sector + rdev->badblocks.size > new_offset) | |
2272 | return 0; | |
2273 | ||
2274 | return 1; | |
0cd17fec | 2275 | } |
1da177e4 | 2276 | |
75c96f85 | 2277 | static struct super_type super_types[] = { |
1da177e4 LT |
2278 | [0] = { |
2279 | .name = "0.90.0", | |
2280 | .owner = THIS_MODULE, | |
0cd17fec CW |
2281 | .load_super = super_90_load, |
2282 | .validate_super = super_90_validate, | |
2283 | .sync_super = super_90_sync, | |
2284 | .rdev_size_change = super_90_rdev_size_change, | |
c6563a8c | 2285 | .allow_new_offset = super_90_allow_new_offset, |
1da177e4 LT |
2286 | }, |
2287 | [1] = { | |
2288 | .name = "md-1", | |
2289 | .owner = THIS_MODULE, | |
0cd17fec CW |
2290 | .load_super = super_1_load, |
2291 | .validate_super = super_1_validate, | |
2292 | .sync_super = super_1_sync, | |
2293 | .rdev_size_change = super_1_rdev_size_change, | |
c6563a8c | 2294 | .allow_new_offset = super_1_allow_new_offset, |
1da177e4 LT |
2295 | }, |
2296 | }; | |
1da177e4 | 2297 | |
fd01b88c | 2298 | static void sync_super(struct mddev *mddev, struct md_rdev *rdev) |
076f968b JB |
2299 | { |
2300 | if (mddev->sync_super) { | |
2301 | mddev->sync_super(mddev, rdev); | |
2302 | return; | |
2303 | } | |
2304 | ||
2305 | BUG_ON(mddev->major_version >= ARRAY_SIZE(super_types)); | |
2306 | ||
2307 | super_types[mddev->major_version].sync_super(mddev, rdev); | |
2308 | } | |
2309 | ||
fd01b88c | 2310 | static int match_mddev_units(struct mddev *mddev1, struct mddev *mddev2) |
1da177e4 | 2311 | { |
3cb03002 | 2312 | struct md_rdev *rdev, *rdev2; |
1da177e4 | 2313 | |
4b80991c | 2314 | rcu_read_lock(); |
0b020e85 SL |
2315 | rdev_for_each_rcu(rdev, mddev1) { |
2316 | if (test_bit(Faulty, &rdev->flags) || | |
2317 | test_bit(Journal, &rdev->flags) || | |
2318 | rdev->raid_disk == -1) | |
2319 | continue; | |
2320 | rdev_for_each_rcu(rdev2, mddev2) { | |
2321 | if (test_bit(Faulty, &rdev2->flags) || | |
2322 | test_bit(Journal, &rdev2->flags) || | |
2323 | rdev2->raid_disk == -1) | |
2324 | continue; | |
61a27e1f | 2325 | if (rdev->bdev->bd_disk == rdev2->bdev->bd_disk) { |
4b80991c | 2326 | rcu_read_unlock(); |
7dd5e7c3 | 2327 | return 1; |
4b80991c | 2328 | } |
0b020e85 SL |
2329 | } |
2330 | } | |
4b80991c | 2331 | rcu_read_unlock(); |
1da177e4 LT |
2332 | return 0; |
2333 | } | |
2334 | ||
2335 | static LIST_HEAD(pending_raid_disks); | |
2336 | ||
ac5e7113 AN |
2337 | /* |
2338 | * Try to register data integrity profile for an mddev | |
2339 | * | |
2340 | * This is called when an array is started and after a disk has been kicked | |
2341 | * from the array. It only succeeds if all working and active component devices | |
2342 | * are integrity capable with matching profiles. | |
2343 | */ | |
fd01b88c | 2344 | int md_integrity_register(struct mddev *mddev) |
ac5e7113 | 2345 | { |
3cb03002 | 2346 | struct md_rdev *rdev, *reference = NULL; |
ac5e7113 AN |
2347 | |
2348 | if (list_empty(&mddev->disks)) | |
2349 | return 0; /* nothing to do */ | |
629acb6a JB |
2350 | if (!mddev->gendisk || blk_get_integrity(mddev->gendisk)) |
2351 | return 0; /* shouldn't register, or already is */ | |
dafb20fa | 2352 | rdev_for_each(rdev, mddev) { |
ac5e7113 AN |
2353 | /* skip spares and non-functional disks */ |
2354 | if (test_bit(Faulty, &rdev->flags)) | |
2355 | continue; | |
2356 | if (rdev->raid_disk < 0) | |
2357 | continue; | |
ac5e7113 AN |
2358 | if (!reference) { |
2359 | /* Use the first rdev as the reference */ | |
2360 | reference = rdev; | |
2361 | continue; | |
2362 | } | |
2363 | /* does this rdev's profile match the reference profile? */ | |
2364 | if (blk_integrity_compare(reference->bdev->bd_disk, | |
2365 | rdev->bdev->bd_disk) < 0) | |
2366 | return -EINVAL; | |
2367 | } | |
89078d57 MP |
2368 | if (!reference || !bdev_get_integrity(reference->bdev)) |
2369 | return 0; | |
ac5e7113 AN |
2370 | /* |
2371 | * All component devices are integrity capable and have matching | |
2372 | * profiles, register the common profile for the md device. | |
2373 | */ | |
25520d55 MP |
2374 | blk_integrity_register(mddev->gendisk, |
2375 | bdev_get_integrity(reference->bdev)); | |
2376 | ||
9d48739e | 2377 | pr_debug("md: data integrity enabled on %s\n", mdname(mddev)); |
afeee514 | 2378 | if (bioset_integrity_create(&mddev->bio_set, BIO_POOL_SIZE)) { |
9d48739e | 2379 | pr_err("md: failed to create integrity pool for %s\n", |
a91a2785 MP |
2380 | mdname(mddev)); |
2381 | return -EINVAL; | |
2382 | } | |
ac5e7113 AN |
2383 | return 0; |
2384 | } | |
2385 | EXPORT_SYMBOL(md_integrity_register); | |
2386 | ||
1501efad DW |
2387 | /* |
2388 | * Attempt to add an rdev, but only if it is consistent with the current | |
2389 | * integrity profile | |
2390 | */ | |
2391 | int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev) | |
3f9d99c1 | 2392 | { |
2863b9eb | 2393 | struct blk_integrity *bi_mddev; |
1501efad | 2394 | char name[BDEVNAME_SIZE]; |
2863b9eb JB |
2395 | |
2396 | if (!mddev->gendisk) | |
1501efad | 2397 | return 0; |
2863b9eb | 2398 | |
2863b9eb | 2399 | bi_mddev = blk_get_integrity(mddev->gendisk); |
3f9d99c1 | 2400 | |
ac5e7113 | 2401 | if (!bi_mddev) /* nothing to do */ |
1501efad DW |
2402 | return 0; |
2403 | ||
2404 | if (blk_integrity_compare(mddev->gendisk, rdev->bdev->bd_disk) != 0) { | |
9d48739e N |
2405 | pr_err("%s: incompatible integrity profile for %s\n", |
2406 | mdname(mddev), bdevname(rdev->bdev, name)); | |
1501efad DW |
2407 | return -ENXIO; |
2408 | } | |
2409 | ||
2410 | return 0; | |
3f9d99c1 | 2411 | } |
ac5e7113 | 2412 | EXPORT_SYMBOL(md_integrity_add_rdev); |
3f9d99c1 | 2413 | |
f72ffdd6 | 2414 | static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) |
1da177e4 | 2415 | { |
7dd5e7c3 | 2416 | char b[BDEVNAME_SIZE]; |
f637b9f9 | 2417 | struct kobject *ko; |
5e55e2f5 | 2418 | int err; |
1da177e4 | 2419 | |
11e2ede0 DW |
2420 | /* prevent duplicates */ |
2421 | if (find_rdev(mddev, rdev->bdev->bd_dev)) | |
2422 | return -EEXIST; | |
2423 | ||
97b20ef7 N |
2424 | if ((bdev_read_only(rdev->bdev) || bdev_read_only(rdev->meta_bdev)) && |
2425 | mddev->pers) | |
2426 | return -EROFS; | |
2427 | ||
dd8ac336 | 2428 | /* make sure rdev->sectors exceeds mddev->dev_sectors */ |
f6b6ec5c SL |
2429 | if (!test_bit(Journal, &rdev->flags) && |
2430 | rdev->sectors && | |
2431 | (mddev->dev_sectors == 0 || rdev->sectors < mddev->dev_sectors)) { | |
a778b73f N |
2432 | if (mddev->pers) { |
2433 | /* Cannot change size, so fail | |
2434 | * If mddev->level <= 0, then we don't care | |
2435 | * about aligning sizes (e.g. linear) | |
2436 | */ | |
2437 | if (mddev->level > 0) | |
2438 | return -ENOSPC; | |
2439 | } else | |
dd8ac336 | 2440 | mddev->dev_sectors = rdev->sectors; |
2bf071bf | 2441 | } |
1da177e4 LT |
2442 | |
2443 | /* Verify rdev->desc_nr is unique. | |
2444 | * If it is -1, assign a free number, else | |
2445 | * check number is not in use | |
2446 | */ | |
4878e9eb | 2447 | rcu_read_lock(); |
1da177e4 LT |
2448 | if (rdev->desc_nr < 0) { |
2449 | int choice = 0; | |
4878e9eb N |
2450 | if (mddev->pers) |
2451 | choice = mddev->raid_disks; | |
57d051dc | 2452 | while (md_find_rdev_nr_rcu(mddev, choice)) |
1da177e4 LT |
2453 | choice++; |
2454 | rdev->desc_nr = choice; | |
2455 | } else { | |
57d051dc | 2456 | if (md_find_rdev_nr_rcu(mddev, rdev->desc_nr)) { |
4878e9eb | 2457 | rcu_read_unlock(); |
1da177e4 | 2458 | return -EBUSY; |
4878e9eb | 2459 | } |
1da177e4 | 2460 | } |
4878e9eb | 2461 | rcu_read_unlock(); |
f6b6ec5c SL |
2462 | if (!test_bit(Journal, &rdev->flags) && |
2463 | mddev->max_disks && rdev->desc_nr >= mddev->max_disks) { | |
9d48739e N |
2464 | pr_warn("md: %s: array is limited to %d devices\n", |
2465 | mdname(mddev), mddev->max_disks); | |
de01dfad N |
2466 | return -EBUSY; |
2467 | } | |
19133a42 | 2468 | bdevname(rdev->bdev,b); |
90a9befb | 2469 | strreplace(b, '/', '!'); |
649316b2 | 2470 | |
1da177e4 | 2471 | rdev->mddev = mddev; |
9d48739e | 2472 | pr_debug("md: bind<%s>\n", b); |
86e6ffdd | 2473 | |
963c555e | 2474 | if (mddev->raid_disks) |
404659cf | 2475 | mddev_create_serial_pool(mddev, rdev, false); |
963c555e | 2476 | |
b2d6db58 | 2477 | if ((err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b))) |
5e55e2f5 | 2478 | goto fail; |
86e6ffdd | 2479 | |
0762b8bd | 2480 | ko = &part_to_dev(rdev->bdev->bd_part)->kobj; |
5e3b8a8d DLM |
2481 | /* failure here is OK */ |
2482 | err = sysfs_create_link(&rdev->kobj, ko, "block"); | |
00bcb4ac | 2483 | rdev->sysfs_state = sysfs_get_dirent_safe(rdev->kobj.sd, "state"); |
e1a86dbb JB |
2484 | rdev->sysfs_unack_badblocks = |
2485 | sysfs_get_dirent_safe(rdev->kobj.sd, "unacknowledged_bad_blocks"); | |
2486 | rdev->sysfs_badblocks = | |
2487 | sysfs_get_dirent_safe(rdev->kobj.sd, "bad_blocks"); | |
3c0ee63a | 2488 | |
4b80991c | 2489 | list_add_rcu(&rdev->same_set, &mddev->disks); |
e09b457b | 2490 | bd_link_disk_holder(rdev->bdev, mddev->gendisk); |
4044ba58 N |
2491 | |
2492 | /* May as well allow recovery to be retried once */ | |
5389042f | 2493 | mddev->recovery_disabled++; |
3f9d99c1 | 2494 | |
1da177e4 | 2495 | return 0; |
5e55e2f5 N |
2496 | |
2497 | fail: | |
9d48739e N |
2498 | pr_warn("md: failed to register dev-%s for %s\n", |
2499 | b, mdname(mddev)); | |
5e55e2f5 | 2500 | return err; |
1da177e4 LT |
2501 | } |
2502 | ||
cc1ffe61 | 2503 | static void rdev_delayed_delete(struct work_struct *ws) |
5792a285 | 2504 | { |
3cb03002 | 2505 | struct md_rdev *rdev = container_of(ws, struct md_rdev, del_work); |
5792a285 | 2506 | kobject_del(&rdev->kobj); |
177a99b2 | 2507 | kobject_put(&rdev->kobj); |
5792a285 N |
2508 | } |
2509 | ||
f72ffdd6 | 2510 | static void unbind_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2511 | { |
2512 | char b[BDEVNAME_SIZE]; | |
403df478 | 2513 | |
49731baa | 2514 | bd_unlink_disk_holder(rdev->bdev, rdev->mddev->gendisk); |
4b80991c | 2515 | list_del_rcu(&rdev->same_set); |
9d48739e | 2516 | pr_debug("md: unbind<%s>\n", bdevname(rdev->bdev,b)); |
11d3a9f6 | 2517 | mddev_destroy_serial_pool(rdev->mddev, rdev, false); |
1da177e4 | 2518 | rdev->mddev = NULL; |
86e6ffdd | 2519 | sysfs_remove_link(&rdev->kobj, "block"); |
3c0ee63a | 2520 | sysfs_put(rdev->sysfs_state); |
e1a86dbb JB |
2521 | sysfs_put(rdev->sysfs_unack_badblocks); |
2522 | sysfs_put(rdev->sysfs_badblocks); | |
3c0ee63a | 2523 | rdev->sysfs_state = NULL; |
e1a86dbb JB |
2524 | rdev->sysfs_unack_badblocks = NULL; |
2525 | rdev->sysfs_badblocks = NULL; | |
2230dfe4 | 2526 | rdev->badblocks.count = 0; |
5792a285 | 2527 | /* We need to delay this, otherwise we can deadlock when |
4b80991c N |
2528 | * writing to 'remove' to "dev/state". We also need |
2529 | * to delay it due to rcu usage. | |
5792a285 | 2530 | */ |
4b80991c | 2531 | synchronize_rcu(); |
cc1ffe61 | 2532 | INIT_WORK(&rdev->del_work, rdev_delayed_delete); |
177a99b2 | 2533 | kobject_get(&rdev->kobj); |
cc1ffe61 | 2534 | queue_work(md_rdev_misc_wq, &rdev->del_work); |
1da177e4 LT |
2535 | } |
2536 | ||
2537 | /* | |
2538 | * prevent the device from being mounted, repartitioned or | |
2539 | * otherwise reused by a RAID array (or any other kernel | |
2540 | * subsystem), by bd_claiming the device. | |
2541 | */ | |
3cb03002 | 2542 | static int lock_rdev(struct md_rdev *rdev, dev_t dev, int shared) |
1da177e4 LT |
2543 | { |
2544 | int err = 0; | |
2545 | struct block_device *bdev; | |
1da177e4 | 2546 | |
d4d77629 | 2547 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, |
3cb03002 | 2548 | shared ? (struct md_rdev *)lock_rdev : rdev); |
1da177e4 | 2549 | if (IS_ERR(bdev)) { |
ea3edd4d CH |
2550 | pr_warn("md: could not open device unknown-block(%u,%u).\n", |
2551 | MAJOR(dev), MINOR(dev)); | |
1da177e4 LT |
2552 | return PTR_ERR(bdev); |
2553 | } | |
1da177e4 LT |
2554 | rdev->bdev = bdev; |
2555 | return err; | |
2556 | } | |
2557 | ||
3cb03002 | 2558 | static void unlock_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2559 | { |
2560 | struct block_device *bdev = rdev->bdev; | |
2561 | rdev->bdev = NULL; | |
e525fd89 | 2562 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
1da177e4 LT |
2563 | } |
2564 | ||
2565 | void md_autodetect_dev(dev_t dev); | |
2566 | ||
f72ffdd6 | 2567 | static void export_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2568 | { |
2569 | char b[BDEVNAME_SIZE]; | |
403df478 | 2570 | |
9d48739e | 2571 | pr_debug("md: export_rdev(%s)\n", bdevname(rdev->bdev,b)); |
545c8795 | 2572 | md_rdev_clear(rdev); |
1da177e4 | 2573 | #ifndef MODULE |
d0fae18f N |
2574 | if (test_bit(AutoDetected, &rdev->flags)) |
2575 | md_autodetect_dev(rdev->bdev->bd_dev); | |
1da177e4 LT |
2576 | #endif |
2577 | unlock_rdev(rdev); | |
86e6ffdd | 2578 | kobject_put(&rdev->kobj); |
1da177e4 LT |
2579 | } |
2580 | ||
fb56dfef | 2581 | void md_kick_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2582 | { |
2583 | unbind_rdev_from_array(rdev); | |
2584 | export_rdev(rdev); | |
2585 | } | |
fb56dfef | 2586 | EXPORT_SYMBOL_GPL(md_kick_rdev_from_array); |
1da177e4 | 2587 | |
fd01b88c | 2588 | static void export_array(struct mddev *mddev) |
1da177e4 | 2589 | { |
0638bb0e | 2590 | struct md_rdev *rdev; |
1da177e4 | 2591 | |
0638bb0e N |
2592 | while (!list_empty(&mddev->disks)) { |
2593 | rdev = list_first_entry(&mddev->disks, struct md_rdev, | |
2594 | same_set); | |
fb56dfef | 2595 | md_kick_rdev_from_array(rdev); |
1da177e4 | 2596 | } |
1da177e4 LT |
2597 | mddev->raid_disks = 0; |
2598 | mddev->major_version = 0; | |
2599 | } | |
2600 | ||
6497709b N |
2601 | static bool set_in_sync(struct mddev *mddev) |
2602 | { | |
efa4b77b | 2603 | lockdep_assert_held(&mddev->lock); |
4ad23a97 N |
2604 | if (!mddev->in_sync) { |
2605 | mddev->sync_checkers++; | |
2606 | spin_unlock(&mddev->lock); | |
2607 | percpu_ref_switch_to_atomic_sync(&mddev->writes_pending); | |
2608 | spin_lock(&mddev->lock); | |
2609 | if (!mddev->in_sync && | |
2610 | percpu_ref_is_zero(&mddev->writes_pending)) { | |
6497709b | 2611 | mddev->in_sync = 1; |
4ad23a97 N |
2612 | /* |
2613 | * Ensure ->in_sync is visible before we clear | |
2614 | * ->sync_checkers. | |
2615 | */ | |
55cc39f3 | 2616 | smp_mb(); |
6497709b N |
2617 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2618 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
2619 | } | |
4ad23a97 N |
2620 | if (--mddev->sync_checkers == 0) |
2621 | percpu_ref_switch_to_percpu(&mddev->writes_pending); | |
6497709b N |
2622 | } |
2623 | if (mddev->safemode == 1) | |
2624 | mddev->safemode = 0; | |
2625 | return mddev->in_sync; | |
2626 | } | |
2627 | ||
f72ffdd6 | 2628 | static void sync_sbs(struct mddev *mddev, int nospares) |
1da177e4 | 2629 | { |
42543769 N |
2630 | /* Update each superblock (in-memory image), but |
2631 | * if we are allowed to, skip spares which already | |
2632 | * have the right event counter, or have one earlier | |
2633 | * (which would mean they aren't being marked as dirty | |
2634 | * with the rest of the array) | |
2635 | */ | |
3cb03002 | 2636 | struct md_rdev *rdev; |
dafb20fa | 2637 | rdev_for_each(rdev, mddev) { |
42543769 N |
2638 | if (rdev->sb_events == mddev->events || |
2639 | (nospares && | |
2640 | rdev->raid_disk < 0 && | |
42543769 N |
2641 | rdev->sb_events+1 == mddev->events)) { |
2642 | /* Don't update this superblock */ | |
2643 | rdev->sb_loaded = 2; | |
2644 | } else { | |
076f968b | 2645 | sync_super(mddev, rdev); |
42543769 N |
2646 | rdev->sb_loaded = 1; |
2647 | } | |
1da177e4 LT |
2648 | } |
2649 | } | |
2650 | ||
2aa82191 GR |
2651 | static bool does_sb_need_changing(struct mddev *mddev) |
2652 | { | |
2653 | struct md_rdev *rdev; | |
2654 | struct mdp_superblock_1 *sb; | |
2655 | int role; | |
2656 | ||
2657 | /* Find a good rdev */ | |
2658 | rdev_for_each(rdev, mddev) | |
2659 | if ((rdev->raid_disk >= 0) && !test_bit(Faulty, &rdev->flags)) | |
2660 | break; | |
2661 | ||
2662 | /* No good device found. */ | |
2663 | if (!rdev) | |
2664 | return false; | |
2665 | ||
2666 | sb = page_address(rdev->sb_page); | |
2667 | /* Check if a device has become faulty or a spare become active */ | |
2668 | rdev_for_each(rdev, mddev) { | |
2669 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
2670 | /* Device activated? */ | |
2671 | if (role == 0xffff && rdev->raid_disk >=0 && | |
2672 | !test_bit(Faulty, &rdev->flags)) | |
2673 | return true; | |
2674 | /* Device turned faulty? */ | |
2675 | if (test_bit(Faulty, &rdev->flags) && (role < 0xfffd)) | |
2676 | return true; | |
2677 | } | |
2678 | ||
2679 | /* Check if any mddev parameters have changed */ | |
2680 | if ((mddev->dev_sectors != le64_to_cpu(sb->size)) || | |
2681 | (mddev->reshape_position != le64_to_cpu(sb->reshape_position)) || | |
13459213 | 2682 | (mddev->layout != le32_to_cpu(sb->layout)) || |
2aa82191 GR |
2683 | (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) || |
2684 | (mddev->chunk_sectors != le32_to_cpu(sb->chunksize))) | |
2685 | return true; | |
2686 | ||
2687 | return false; | |
2688 | } | |
2689 | ||
1aee41f6 | 2690 | void md_update_sb(struct mddev *mddev, int force_change) |
1da177e4 | 2691 | { |
3cb03002 | 2692 | struct md_rdev *rdev; |
06d91a5f | 2693 | int sync_req; |
42543769 | 2694 | int nospares = 0; |
2699b672 | 2695 | int any_badblocks_changed = 0; |
23b63f9f | 2696 | int ret = -1; |
1da177e4 | 2697 | |
d87f064f N |
2698 | if (mddev->ro) { |
2699 | if (force_change) | |
2953079c | 2700 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
d87f064f N |
2701 | return; |
2702 | } | |
2aa82191 | 2703 | |
2c97cf13 | 2704 | repeat: |
2aa82191 | 2705 | if (mddev_is_clustered(mddev)) { |
2953079c | 2706 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
2aa82191 | 2707 | force_change = 1; |
2953079c | 2708 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
85ad1d13 | 2709 | nospares = 1; |
23b63f9f | 2710 | ret = md_cluster_ops->metadata_update_start(mddev); |
2aa82191 GR |
2711 | /* Has someone else has updated the sb */ |
2712 | if (!does_sb_need_changing(mddev)) { | |
23b63f9f GJ |
2713 | if (ret == 0) |
2714 | md_cluster_ops->metadata_update_cancel(mddev); | |
2953079c SL |
2715 | bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2716 | BIT(MD_SB_CHANGE_DEVS) | | |
2717 | BIT(MD_SB_CHANGE_CLEAN)); | |
2aa82191 GR |
2718 | return; |
2719 | } | |
2720 | } | |
2c97cf13 | 2721 | |
db0505d3 N |
2722 | /* |
2723 | * First make sure individual recovery_offsets are correct | |
2724 | * curr_resync_completed can only be used during recovery. | |
2725 | * During reshape/resync it might use array-addresses rather | |
2726 | * that device addresses. | |
2727 | */ | |
dafb20fa | 2728 | rdev_for_each(rdev, mddev) { |
3a3a5ddb N |
2729 | if (rdev->raid_disk >= 0 && |
2730 | mddev->delta_disks >= 0 && | |
db0505d3 N |
2731 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
2732 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery) && | |
2733 | !test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
f2076e7d | 2734 | !test_bit(Journal, &rdev->flags) && |
3a3a5ddb N |
2735 | !test_bit(In_sync, &rdev->flags) && |
2736 | mddev->curr_resync_completed > rdev->recovery_offset) | |
2737 | rdev->recovery_offset = mddev->curr_resync_completed; | |
2738 | ||
f72ffdd6 | 2739 | } |
bd52b746 | 2740 | if (!mddev->persistent) { |
2953079c SL |
2741 | clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2742 | clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
de393cde | 2743 | if (!mddev->external) { |
2953079c | 2744 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
dafb20fa | 2745 | rdev_for_each(rdev, mddev) { |
de393cde | 2746 | if (rdev->badblocks.changed) { |
d0962936 | 2747 | rdev->badblocks.changed = 0; |
fc974ee2 | 2748 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2749 | md_error(mddev, rdev); |
2750 | } | |
2751 | clear_bit(Blocked, &rdev->flags); | |
2752 | clear_bit(BlockedBadBlocks, &rdev->flags); | |
2753 | wake_up(&rdev->blocked_wait); | |
2754 | } | |
2755 | } | |
3a3a5ddb N |
2756 | wake_up(&mddev->sb_wait); |
2757 | return; | |
2758 | } | |
2759 | ||
85572d7c | 2760 | spin_lock(&mddev->lock); |
84692195 | 2761 | |
9ebc6ef1 | 2762 | mddev->utime = ktime_get_real_seconds(); |
3a3a5ddb | 2763 | |
2953079c | 2764 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
850b2b42 | 2765 | force_change = 1; |
2953079c | 2766 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
850b2b42 N |
2767 | /* just a clean<-> dirty transition, possibly leave spares alone, |
2768 | * though if events isn't the right even/odd, we will have to do | |
2769 | * spares after all | |
2770 | */ | |
2771 | nospares = 1; | |
2772 | if (force_change) | |
2773 | nospares = 0; | |
2774 | if (mddev->degraded) | |
84692195 N |
2775 | /* If the array is degraded, then skipping spares is both |
2776 | * dangerous and fairly pointless. | |
2777 | * Dangerous because a device that was removed from the array | |
2778 | * might have a event_count that still looks up-to-date, | |
2779 | * so it can be re-added without a resync. | |
2780 | * Pointless because if there are any spares to skip, | |
2781 | * then a recovery will happen and soon that array won't | |
2782 | * be degraded any more and the spare can go back to sleep then. | |
2783 | */ | |
850b2b42 | 2784 | nospares = 0; |
84692195 | 2785 | |
06d91a5f | 2786 | sync_req = mddev->in_sync; |
42543769 N |
2787 | |
2788 | /* If this is just a dirty<->clean transition, and the array is clean | |
2789 | * and 'events' is odd, we can roll back to the previous clean state */ | |
850b2b42 | 2790 | if (nospares |
42543769 | 2791 | && (mddev->in_sync && mddev->recovery_cp == MaxSector) |
a8707c08 N |
2792 | && mddev->can_decrease_events |
2793 | && mddev->events != 1) { | |
42543769 | 2794 | mddev->events--; |
a8707c08 N |
2795 | mddev->can_decrease_events = 0; |
2796 | } else { | |
42543769 N |
2797 | /* otherwise we have to go forward and ... */ |
2798 | mddev->events ++; | |
a8707c08 | 2799 | mddev->can_decrease_events = nospares; |
42543769 | 2800 | } |
1da177e4 | 2801 | |
403df478 N |
2802 | /* |
2803 | * This 64-bit counter should never wrap. | |
2804 | * Either we are in around ~1 trillion A.C., assuming | |
2805 | * 1 reboot per second, or we have a bug... | |
2806 | */ | |
2807 | WARN_ON(mddev->events == 0); | |
2699b672 | 2808 | |
dafb20fa | 2809 | rdev_for_each(rdev, mddev) { |
2699b672 N |
2810 | if (rdev->badblocks.changed) |
2811 | any_badblocks_changed++; | |
de393cde N |
2812 | if (test_bit(Faulty, &rdev->flags)) |
2813 | set_bit(FaultRecorded, &rdev->flags); | |
2814 | } | |
2699b672 | 2815 | |
e691063a | 2816 | sync_sbs(mddev, nospares); |
85572d7c | 2817 | spin_unlock(&mddev->lock); |
1da177e4 | 2818 | |
36a4e1fe N |
2819 | pr_debug("md: updating %s RAID superblock on device (in sync %d)\n", |
2820 | mdname(mddev), mddev->in_sync); | |
1da177e4 | 2821 | |
504634f6 SL |
2822 | if (mddev->queue) |
2823 | blk_add_trace_msg(mddev->queue, "md md_update_sb"); | |
46533ff7 | 2824 | rewrite: |
e64e4018 | 2825 | md_bitmap_update_sb(mddev->bitmap); |
dafb20fa | 2826 | rdev_for_each(rdev, mddev) { |
1da177e4 | 2827 | char b[BDEVNAME_SIZE]; |
36a4e1fe | 2828 | |
42543769 N |
2829 | if (rdev->sb_loaded != 1) |
2830 | continue; /* no noise on spare devices */ | |
1da177e4 | 2831 | |
f466722c | 2832 | if (!test_bit(Faulty, &rdev->flags)) { |
7bfa19f2 | 2833 | md_super_write(mddev,rdev, |
0f420358 | 2834 | rdev->sb_start, rdev->sb_size, |
7bfa19f2 | 2835 | rdev->sb_page); |
36a4e1fe N |
2836 | pr_debug("md: (write) %s's sb offset: %llu\n", |
2837 | bdevname(rdev->bdev, b), | |
2838 | (unsigned long long)rdev->sb_start); | |
42543769 | 2839 | rdev->sb_events = mddev->events; |
2699b672 N |
2840 | if (rdev->badblocks.size) { |
2841 | md_super_write(mddev, rdev, | |
2842 | rdev->badblocks.sector, | |
2843 | rdev->badblocks.size << 9, | |
2844 | rdev->bb_page); | |
2845 | rdev->badblocks.size = 0; | |
2846 | } | |
7bfa19f2 | 2847 | |
f466722c | 2848 | } else |
36a4e1fe N |
2849 | pr_debug("md: %s (skipping faulty)\n", |
2850 | bdevname(rdev->bdev, b)); | |
d70ed2e4 | 2851 | |
7bfa19f2 | 2852 | if (mddev->level == LEVEL_MULTIPATH) |
1da177e4 LT |
2853 | /* only need to write one superblock... */ |
2854 | break; | |
2855 | } | |
46533ff7 N |
2856 | if (md_super_wait(mddev) < 0) |
2857 | goto rewrite; | |
2953079c | 2858 | /* if there was a failure, MD_SB_CHANGE_DEVS was set, and we re-write super */ |
7bfa19f2 | 2859 | |
2c97cf13 GJ |
2860 | if (mddev_is_clustered(mddev) && ret == 0) |
2861 | md_cluster_ops->metadata_update_finish(mddev); | |
2862 | ||
850b2b42 | 2863 | if (mddev->in_sync != sync_req || |
2953079c SL |
2864 | !bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2865 | BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_CLEAN))) | |
06d91a5f | 2866 | /* have to write it out again */ |
06d91a5f | 2867 | goto repeat; |
3d310eb7 | 2868 | wake_up(&mddev->sb_wait); |
acb180b0 | 2869 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
e1a86dbb | 2870 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
06d91a5f | 2871 | |
dafb20fa | 2872 | rdev_for_each(rdev, mddev) { |
de393cde N |
2873 | if (test_and_clear_bit(FaultRecorded, &rdev->flags)) |
2874 | clear_bit(Blocked, &rdev->flags); | |
2875 | ||
2876 | if (any_badblocks_changed) | |
fc974ee2 | 2877 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2878 | clear_bit(BlockedBadBlocks, &rdev->flags); |
2879 | wake_up(&rdev->blocked_wait); | |
2880 | } | |
1da177e4 | 2881 | } |
1aee41f6 | 2882 | EXPORT_SYMBOL(md_update_sb); |
1da177e4 | 2883 | |
a6da4ef8 GR |
2884 | static int add_bound_rdev(struct md_rdev *rdev) |
2885 | { | |
2886 | struct mddev *mddev = rdev->mddev; | |
2887 | int err = 0; | |
87d4d916 | 2888 | bool add_journal = test_bit(Journal, &rdev->flags); |
a6da4ef8 | 2889 | |
87d4d916 | 2890 | if (!mddev->pers->hot_remove_disk || add_journal) { |
a6da4ef8 GR |
2891 | /* If there is hot_add_disk but no hot_remove_disk |
2892 | * then added disks for geometry changes, | |
2893 | * and should be added immediately. | |
2894 | */ | |
2895 | super_types[mddev->major_version]. | |
2896 | validate_super(mddev, rdev); | |
87d4d916 SL |
2897 | if (add_journal) |
2898 | mddev_suspend(mddev); | |
a6da4ef8 | 2899 | err = mddev->pers->hot_add_disk(mddev, rdev); |
87d4d916 SL |
2900 | if (add_journal) |
2901 | mddev_resume(mddev); | |
a6da4ef8 | 2902 | if (err) { |
db767672 | 2903 | md_kick_rdev_from_array(rdev); |
a6da4ef8 GR |
2904 | return err; |
2905 | } | |
2906 | } | |
2907 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2908 | ||
2953079c | 2909 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a6da4ef8 GR |
2910 | if (mddev->degraded) |
2911 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
2912 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
2913 | md_new_event(mddev); | |
2914 | md_wakeup_thread(mddev->thread); | |
2915 | return 0; | |
2916 | } | |
1da177e4 | 2917 | |
7f6ce769 | 2918 | /* words written to sysfs files may, or may not, be \n terminated. |
bce74dac N |
2919 | * We want to accept with case. For this we use cmd_match. |
2920 | */ | |
2921 | static int cmd_match(const char *cmd, const char *str) | |
2922 | { | |
2923 | /* See if cmd, written into a sysfs file, matches | |
2924 | * str. They must either be the same, or cmd can | |
2925 | * have a trailing newline | |
2926 | */ | |
2927 | while (*cmd && *str && *cmd == *str) { | |
2928 | cmd++; | |
2929 | str++; | |
2930 | } | |
2931 | if (*cmd == '\n') | |
2932 | cmd++; | |
2933 | if (*str || *cmd) | |
2934 | return 0; | |
2935 | return 1; | |
2936 | } | |
2937 | ||
86e6ffdd N |
2938 | struct rdev_sysfs_entry { |
2939 | struct attribute attr; | |
3cb03002 N |
2940 | ssize_t (*show)(struct md_rdev *, char *); |
2941 | ssize_t (*store)(struct md_rdev *, const char *, size_t); | |
86e6ffdd N |
2942 | }; |
2943 | ||
2944 | static ssize_t | |
3cb03002 | 2945 | state_show(struct md_rdev *rdev, char *page) |
86e6ffdd | 2946 | { |
35b785f7 | 2947 | char *sep = ","; |
20a49ff6 | 2948 | size_t len = 0; |
6aa7de05 | 2949 | unsigned long flags = READ_ONCE(rdev->flags); |
86e6ffdd | 2950 | |
758bfc8a | 2951 | if (test_bit(Faulty, &flags) || |
dcbcb486 TM |
2952 | (!test_bit(ExternalBbl, &flags) && |
2953 | rdev->badblocks.unacked_exist)) | |
35b785f7 TM |
2954 | len += sprintf(page+len, "faulty%s", sep); |
2955 | if (test_bit(In_sync, &flags)) | |
2956 | len += sprintf(page+len, "in_sync%s", sep); | |
2957 | if (test_bit(Journal, &flags)) | |
2958 | len += sprintf(page+len, "journal%s", sep); | |
2959 | if (test_bit(WriteMostly, &flags)) | |
2960 | len += sprintf(page+len, "write_mostly%s", sep); | |
758bfc8a | 2961 | if (test_bit(Blocked, &flags) || |
52c64152 | 2962 | (rdev->badblocks.unacked_exist |
35b785f7 TM |
2963 | && !test_bit(Faulty, &flags))) |
2964 | len += sprintf(page+len, "blocked%s", sep); | |
758bfc8a | 2965 | if (!test_bit(Faulty, &flags) && |
f2076e7d | 2966 | !test_bit(Journal, &flags) && |
35b785f7 TM |
2967 | !test_bit(In_sync, &flags)) |
2968 | len += sprintf(page+len, "spare%s", sep); | |
2969 | if (test_bit(WriteErrorSeen, &flags)) | |
2970 | len += sprintf(page+len, "write_error%s", sep); | |
2971 | if (test_bit(WantReplacement, &flags)) | |
2972 | len += sprintf(page+len, "want_replacement%s", sep); | |
2973 | if (test_bit(Replacement, &flags)) | |
2974 | len += sprintf(page+len, "replacement%s", sep); | |
2975 | if (test_bit(ExternalBbl, &flags)) | |
2976 | len += sprintf(page+len, "external_bbl%s", sep); | |
688834e6 N |
2977 | if (test_bit(FailFast, &flags)) |
2978 | len += sprintf(page+len, "failfast%s", sep); | |
35b785f7 TM |
2979 | |
2980 | if (len) | |
2981 | len -= strlen(sep); | |
2d78f8c4 | 2982 | |
86e6ffdd N |
2983 | return len+sprintf(page+len, "\n"); |
2984 | } | |
2985 | ||
45dc2de1 | 2986 | static ssize_t |
3cb03002 | 2987 | state_store(struct md_rdev *rdev, const char *buf, size_t len) |
45dc2de1 N |
2988 | { |
2989 | /* can write | |
de393cde | 2990 | * faulty - simulates an error |
45dc2de1 | 2991 | * remove - disconnects the device |
f655675b N |
2992 | * writemostly - sets write_mostly |
2993 | * -writemostly - clears write_mostly | |
de393cde N |
2994 | * blocked - sets the Blocked flags |
2995 | * -blocked - clears the Blocked and possibly simulates an error | |
6d56e278 | 2996 | * insync - sets Insync providing device isn't active |
f466722c N |
2997 | * -insync - clear Insync for a device with a slot assigned, |
2998 | * so that it gets rebuilt based on bitmap | |
d7a9d443 N |
2999 | * write_error - sets WriteErrorSeen |
3000 | * -write_error - clears WriteErrorSeen | |
688834e6 | 3001 | * {,-}failfast - set/clear FailFast |
45dc2de1 N |
3002 | */ |
3003 | int err = -EINVAL; | |
3004 | if (cmd_match(buf, "faulty") && rdev->mddev->pers) { | |
3005 | md_error(rdev->mddev, rdev); | |
5ef56c8f N |
3006 | if (test_bit(Faulty, &rdev->flags)) |
3007 | err = 0; | |
3008 | else | |
3009 | err = -EBUSY; | |
45dc2de1 | 3010 | } else if (cmd_match(buf, "remove")) { |
5d881783 SL |
3011 | if (rdev->mddev->pers) { |
3012 | clear_bit(Blocked, &rdev->flags); | |
3013 | remove_and_add_spares(rdev->mddev, rdev); | |
3014 | } | |
45dc2de1 N |
3015 | if (rdev->raid_disk >= 0) |
3016 | err = -EBUSY; | |
3017 | else { | |
fd01b88c | 3018 | struct mddev *mddev = rdev->mddev; |
45dc2de1 | 3019 | err = 0; |
a9720903 GJ |
3020 | if (mddev_is_clustered(mddev)) |
3021 | err = md_cluster_ops->remove_disk(mddev, rdev); | |
3022 | ||
3023 | if (err == 0) { | |
3024 | md_kick_rdev_from_array(rdev); | |
060b0689 | 3025 | if (mddev->pers) { |
2953079c | 3026 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
3027 | md_wakeup_thread(mddev->thread); |
3028 | } | |
a9720903 GJ |
3029 | md_new_event(mddev); |
3030 | } | |
45dc2de1 | 3031 | } |
f655675b N |
3032 | } else if (cmd_match(buf, "writemostly")) { |
3033 | set_bit(WriteMostly, &rdev->flags); | |
404659cf | 3034 | mddev_create_serial_pool(rdev->mddev, rdev, false); |
f655675b N |
3035 | err = 0; |
3036 | } else if (cmd_match(buf, "-writemostly")) { | |
11d3a9f6 | 3037 | mddev_destroy_serial_pool(rdev->mddev, rdev, false); |
f655675b | 3038 | clear_bit(WriteMostly, &rdev->flags); |
6bfe0b49 DW |
3039 | err = 0; |
3040 | } else if (cmd_match(buf, "blocked")) { | |
3041 | set_bit(Blocked, &rdev->flags); | |
3042 | err = 0; | |
3043 | } else if (cmd_match(buf, "-blocked")) { | |
de393cde | 3044 | if (!test_bit(Faulty, &rdev->flags) && |
dcbcb486 | 3045 | !test_bit(ExternalBbl, &rdev->flags) && |
7da64a0a | 3046 | rdev->badblocks.unacked_exist) { |
de393cde N |
3047 | /* metadata handler doesn't understand badblocks, |
3048 | * so we need to fail the device | |
3049 | */ | |
3050 | md_error(rdev->mddev, rdev); | |
3051 | } | |
6bfe0b49 | 3052 | clear_bit(Blocked, &rdev->flags); |
de393cde | 3053 | clear_bit(BlockedBadBlocks, &rdev->flags); |
6bfe0b49 DW |
3054 | wake_up(&rdev->blocked_wait); |
3055 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
3056 | md_wakeup_thread(rdev->mddev->thread); | |
3057 | ||
6d56e278 N |
3058 | err = 0; |
3059 | } else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) { | |
3060 | set_bit(In_sync, &rdev->flags); | |
f655675b | 3061 | err = 0; |
688834e6 N |
3062 | } else if (cmd_match(buf, "failfast")) { |
3063 | set_bit(FailFast, &rdev->flags); | |
3064 | err = 0; | |
3065 | } else if (cmd_match(buf, "-failfast")) { | |
3066 | clear_bit(FailFast, &rdev->flags); | |
3067 | err = 0; | |
f2076e7d SL |
3068 | } else if (cmd_match(buf, "-insync") && rdev->raid_disk >= 0 && |
3069 | !test_bit(Journal, &rdev->flags)) { | |
e1960f8c N |
3070 | if (rdev->mddev->pers == NULL) { |
3071 | clear_bit(In_sync, &rdev->flags); | |
3072 | rdev->saved_raid_disk = rdev->raid_disk; | |
3073 | rdev->raid_disk = -1; | |
3074 | err = 0; | |
3075 | } | |
d7a9d443 N |
3076 | } else if (cmd_match(buf, "write_error")) { |
3077 | set_bit(WriteErrorSeen, &rdev->flags); | |
3078 | err = 0; | |
3079 | } else if (cmd_match(buf, "-write_error")) { | |
3080 | clear_bit(WriteErrorSeen, &rdev->flags); | |
3081 | err = 0; | |
2d78f8c4 N |
3082 | } else if (cmd_match(buf, "want_replacement")) { |
3083 | /* Any non-spare device that is not a replacement can | |
3084 | * become want_replacement at any time, but we then need to | |
3085 | * check if recovery is needed. | |
3086 | */ | |
3087 | if (rdev->raid_disk >= 0 && | |
f2076e7d | 3088 | !test_bit(Journal, &rdev->flags) && |
2d78f8c4 N |
3089 | !test_bit(Replacement, &rdev->flags)) |
3090 | set_bit(WantReplacement, &rdev->flags); | |
3091 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
3092 | md_wakeup_thread(rdev->mddev->thread); | |
3093 | err = 0; | |
3094 | } else if (cmd_match(buf, "-want_replacement")) { | |
3095 | /* Clearing 'want_replacement' is always allowed. | |
3096 | * Once replacements starts it is too late though. | |
3097 | */ | |
3098 | err = 0; | |
3099 | clear_bit(WantReplacement, &rdev->flags); | |
3100 | } else if (cmd_match(buf, "replacement")) { | |
3101 | /* Can only set a device as a replacement when array has not | |
3102 | * yet been started. Once running, replacement is automatic | |
3103 | * from spares, or by assigning 'slot'. | |
3104 | */ | |
3105 | if (rdev->mddev->pers) | |
3106 | err = -EBUSY; | |
3107 | else { | |
3108 | set_bit(Replacement, &rdev->flags); | |
3109 | err = 0; | |
3110 | } | |
3111 | } else if (cmd_match(buf, "-replacement")) { | |
3112 | /* Similarly, can only clear Replacement before start */ | |
3113 | if (rdev->mddev->pers) | |
3114 | err = -EBUSY; | |
3115 | else { | |
3116 | clear_bit(Replacement, &rdev->flags); | |
3117 | err = 0; | |
3118 | } | |
a6da4ef8 | 3119 | } else if (cmd_match(buf, "re-add")) { |
ee37e621 YY |
3120 | if (!rdev->mddev->pers) |
3121 | err = -EINVAL; | |
3122 | else if (test_bit(Faulty, &rdev->flags) && (rdev->raid_disk == -1) && | |
3123 | rdev->saved_raid_disk >= 0) { | |
97f6cd39 GR |
3124 | /* clear_bit is performed _after_ all the devices |
3125 | * have their local Faulty bit cleared. If any writes | |
3126 | * happen in the meantime in the local node, they | |
3127 | * will land in the local bitmap, which will be synced | |
3128 | * by this node eventually | |
3129 | */ | |
3130 | if (!mddev_is_clustered(rdev->mddev) || | |
3131 | (err = md_cluster_ops->gather_bitmaps(rdev)) == 0) { | |
3132 | clear_bit(Faulty, &rdev->flags); | |
3133 | err = add_bound_rdev(rdev); | |
3134 | } | |
a6da4ef8 GR |
3135 | } else |
3136 | err = -EBUSY; | |
35b785f7 TM |
3137 | } else if (cmd_match(buf, "external_bbl") && (rdev->mddev->external)) { |
3138 | set_bit(ExternalBbl, &rdev->flags); | |
3139 | rdev->badblocks.shift = 0; | |
3140 | err = 0; | |
3141 | } else if (cmd_match(buf, "-external_bbl") && (rdev->mddev->external)) { | |
3142 | clear_bit(ExternalBbl, &rdev->flags); | |
3143 | err = 0; | |
45dc2de1 | 3144 | } |
00bcb4ac N |
3145 | if (!err) |
3146 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
45dc2de1 N |
3147 | return err ? err : len; |
3148 | } | |
80ca3a44 | 3149 | static struct rdev_sysfs_entry rdev_state = |
750f199e | 3150 | __ATTR_PREALLOC(state, S_IRUGO|S_IWUSR, state_show, state_store); |
86e6ffdd | 3151 | |
4dbcdc75 | 3152 | static ssize_t |
3cb03002 | 3153 | errors_show(struct md_rdev *rdev, char *page) |
4dbcdc75 N |
3154 | { |
3155 | return sprintf(page, "%d\n", atomic_read(&rdev->corrected_errors)); | |
3156 | } | |
3157 | ||
3158 | static ssize_t | |
3cb03002 | 3159 | errors_store(struct md_rdev *rdev, const char *buf, size_t len) |
4dbcdc75 | 3160 | { |
4c9309c0 AD |
3161 | unsigned int n; |
3162 | int rv; | |
3163 | ||
3164 | rv = kstrtouint(buf, 10, &n); | |
3165 | if (rv < 0) | |
3166 | return rv; | |
3167 | atomic_set(&rdev->corrected_errors, n); | |
3168 | return len; | |
4dbcdc75 N |
3169 | } |
3170 | static struct rdev_sysfs_entry rdev_errors = | |
80ca3a44 | 3171 | __ATTR(errors, S_IRUGO|S_IWUSR, errors_show, errors_store); |
4dbcdc75 | 3172 | |
014236d2 | 3173 | static ssize_t |
3cb03002 | 3174 | slot_show(struct md_rdev *rdev, char *page) |
014236d2 | 3175 | { |
f2076e7d SL |
3176 | if (test_bit(Journal, &rdev->flags)) |
3177 | return sprintf(page, "journal\n"); | |
3178 | else if (rdev->raid_disk < 0) | |
014236d2 N |
3179 | return sprintf(page, "none\n"); |
3180 | else | |
3181 | return sprintf(page, "%d\n", rdev->raid_disk); | |
3182 | } | |
3183 | ||
3184 | static ssize_t | |
3cb03002 | 3185 | slot_store(struct md_rdev *rdev, const char *buf, size_t len) |
014236d2 | 3186 | { |
4c9309c0 | 3187 | int slot; |
c303da6d | 3188 | int err; |
4c9309c0 | 3189 | |
f2076e7d SL |
3190 | if (test_bit(Journal, &rdev->flags)) |
3191 | return -EBUSY; | |
014236d2 N |
3192 | if (strncmp(buf, "none", 4)==0) |
3193 | slot = -1; | |
4c9309c0 AD |
3194 | else { |
3195 | err = kstrtouint(buf, 10, (unsigned int *)&slot); | |
3196 | if (err < 0) | |
3197 | return err; | |
3198 | } | |
6c2fce2e | 3199 | if (rdev->mddev->pers && slot == -1) { |
c303da6d N |
3200 | /* Setting 'slot' on an active array requires also |
3201 | * updating the 'rd%d' link, and communicating | |
3202 | * with the personality with ->hot_*_disk. | |
3203 | * For now we only support removing | |
3204 | * failed/spare devices. This normally happens automatically, | |
3205 | * but not when the metadata is externally managed. | |
3206 | */ | |
c303da6d N |
3207 | if (rdev->raid_disk == -1) |
3208 | return -EEXIST; | |
3209 | /* personality does all needed checks */ | |
01393f3d | 3210 | if (rdev->mddev->pers->hot_remove_disk == NULL) |
c303da6d | 3211 | return -EINVAL; |
746d3207 N |
3212 | clear_bit(Blocked, &rdev->flags); |
3213 | remove_and_add_spares(rdev->mddev, rdev); | |
3214 | if (rdev->raid_disk >= 0) | |
3215 | return -EBUSY; | |
c303da6d N |
3216 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); |
3217 | md_wakeup_thread(rdev->mddev->thread); | |
6c2fce2e | 3218 | } else if (rdev->mddev->pers) { |
6c2fce2e | 3219 | /* Activating a spare .. or possibly reactivating |
6d56e278 | 3220 | * if we ever get bitmaps working here. |
6c2fce2e | 3221 | */ |
cb01c549 | 3222 | int err; |
6c2fce2e NB |
3223 | |
3224 | if (rdev->raid_disk != -1) | |
3225 | return -EBUSY; | |
3226 | ||
c6751b2b N |
3227 | if (test_bit(MD_RECOVERY_RUNNING, &rdev->mddev->recovery)) |
3228 | return -EBUSY; | |
3229 | ||
6c2fce2e NB |
3230 | if (rdev->mddev->pers->hot_add_disk == NULL) |
3231 | return -EINVAL; | |
3232 | ||
ba1b41b6 N |
3233 | if (slot >= rdev->mddev->raid_disks && |
3234 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
3235 | return -ENOSPC; | |
3236 | ||
6c2fce2e NB |
3237 | rdev->raid_disk = slot; |
3238 | if (test_bit(In_sync, &rdev->flags)) | |
3239 | rdev->saved_raid_disk = slot; | |
3240 | else | |
3241 | rdev->saved_raid_disk = -1; | |
d30519fc | 3242 | clear_bit(In_sync, &rdev->flags); |
8313b8e5 | 3243 | clear_bit(Bitmap_sync, &rdev->flags); |
3f79cc22 | 3244 | err = rdev->mddev->pers->hot_add_disk(rdev->mddev, rdev); |
cb01c549 GR |
3245 | if (err) { |
3246 | rdev->raid_disk = -1; | |
3247 | return err; | |
3248 | } else | |
3249 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
5e3b8a8d DLM |
3250 | /* failure here is OK */; |
3251 | sysfs_link_rdev(rdev->mddev, rdev); | |
6c2fce2e | 3252 | /* don't wakeup anyone, leave that to userspace. */ |
c303da6d | 3253 | } else { |
ba1b41b6 N |
3254 | if (slot >= rdev->mddev->raid_disks && |
3255 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
c303da6d N |
3256 | return -ENOSPC; |
3257 | rdev->raid_disk = slot; | |
3258 | /* assume it is working */ | |
c5d79adb N |
3259 | clear_bit(Faulty, &rdev->flags); |
3260 | clear_bit(WriteMostly, &rdev->flags); | |
c303da6d | 3261 | set_bit(In_sync, &rdev->flags); |
00bcb4ac | 3262 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
c303da6d | 3263 | } |
014236d2 N |
3264 | return len; |
3265 | } | |
3266 | ||
014236d2 | 3267 | static struct rdev_sysfs_entry rdev_slot = |
80ca3a44 | 3268 | __ATTR(slot, S_IRUGO|S_IWUSR, slot_show, slot_store); |
014236d2 | 3269 | |
93c8cad0 | 3270 | static ssize_t |
3cb03002 | 3271 | offset_show(struct md_rdev *rdev, char *page) |
93c8cad0 | 3272 | { |
6961ece4 | 3273 | return sprintf(page, "%llu\n", (unsigned long long)rdev->data_offset); |
93c8cad0 N |
3274 | } |
3275 | ||
3276 | static ssize_t | |
3cb03002 | 3277 | offset_store(struct md_rdev *rdev, const char *buf, size_t len) |
93c8cad0 | 3278 | { |
c6563a8c | 3279 | unsigned long long offset; |
b29bebd6 | 3280 | if (kstrtoull(buf, 10, &offset) < 0) |
93c8cad0 | 3281 | return -EINVAL; |
8ed0a521 | 3282 | if (rdev->mddev->pers && rdev->raid_disk >= 0) |
93c8cad0 | 3283 | return -EBUSY; |
dd8ac336 | 3284 | if (rdev->sectors && rdev->mddev->external) |
c5d79adb N |
3285 | /* Must set offset before size, so overlap checks |
3286 | * can be sane */ | |
3287 | return -EBUSY; | |
93c8cad0 | 3288 | rdev->data_offset = offset; |
25f7fd47 | 3289 | rdev->new_data_offset = offset; |
93c8cad0 N |
3290 | return len; |
3291 | } | |
3292 | ||
3293 | static struct rdev_sysfs_entry rdev_offset = | |
80ca3a44 | 3294 | __ATTR(offset, S_IRUGO|S_IWUSR, offset_show, offset_store); |
93c8cad0 | 3295 | |
c6563a8c N |
3296 | static ssize_t new_offset_show(struct md_rdev *rdev, char *page) |
3297 | { | |
3298 | return sprintf(page, "%llu\n", | |
3299 | (unsigned long long)rdev->new_data_offset); | |
3300 | } | |
3301 | ||
3302 | static ssize_t new_offset_store(struct md_rdev *rdev, | |
3303 | const char *buf, size_t len) | |
3304 | { | |
3305 | unsigned long long new_offset; | |
3306 | struct mddev *mddev = rdev->mddev; | |
3307 | ||
b29bebd6 | 3308 | if (kstrtoull(buf, 10, &new_offset) < 0) |
c6563a8c N |
3309 | return -EINVAL; |
3310 | ||
f851b60d N |
3311 | if (mddev->sync_thread || |
3312 | test_bit(MD_RECOVERY_RUNNING,&mddev->recovery)) | |
c6563a8c N |
3313 | return -EBUSY; |
3314 | if (new_offset == rdev->data_offset) | |
3315 | /* reset is always permitted */ | |
3316 | ; | |
3317 | else if (new_offset > rdev->data_offset) { | |
3318 | /* must not push array size beyond rdev_sectors */ | |
3319 | if (new_offset - rdev->data_offset | |
3320 | + mddev->dev_sectors > rdev->sectors) | |
3321 | return -E2BIG; | |
3322 | } | |
3323 | /* Metadata worries about other space details. */ | |
3324 | ||
3325 | /* decreasing the offset is inconsistent with a backwards | |
3326 | * reshape. | |
3327 | */ | |
3328 | if (new_offset < rdev->data_offset && | |
3329 | mddev->reshape_backwards) | |
3330 | return -EINVAL; | |
3331 | /* Increasing offset is inconsistent with forwards | |
3332 | * reshape. reshape_direction should be set to | |
3333 | * 'backwards' first. | |
3334 | */ | |
3335 | if (new_offset > rdev->data_offset && | |
3336 | !mddev->reshape_backwards) | |
3337 | return -EINVAL; | |
3338 | ||
3339 | if (mddev->pers && mddev->persistent && | |
3340 | !super_types[mddev->major_version] | |
3341 | .allow_new_offset(rdev, new_offset)) | |
3342 | return -E2BIG; | |
3343 | rdev->new_data_offset = new_offset; | |
3344 | if (new_offset > rdev->data_offset) | |
3345 | mddev->reshape_backwards = 1; | |
3346 | else if (new_offset < rdev->data_offset) | |
3347 | mddev->reshape_backwards = 0; | |
3348 | ||
3349 | return len; | |
3350 | } | |
3351 | static struct rdev_sysfs_entry rdev_new_offset = | |
3352 | __ATTR(new_offset, S_IRUGO|S_IWUSR, new_offset_show, new_offset_store); | |
3353 | ||
83303b61 | 3354 | static ssize_t |
3cb03002 | 3355 | rdev_size_show(struct md_rdev *rdev, char *page) |
83303b61 | 3356 | { |
dd8ac336 | 3357 | return sprintf(page, "%llu\n", (unsigned long long)rdev->sectors / 2); |
83303b61 N |
3358 | } |
3359 | ||
c5d79adb N |
3360 | static int overlaps(sector_t s1, sector_t l1, sector_t s2, sector_t l2) |
3361 | { | |
3362 | /* check if two start/length pairs overlap */ | |
3363 | if (s1+l1 <= s2) | |
3364 | return 0; | |
3365 | if (s2+l2 <= s1) | |
3366 | return 0; | |
3367 | return 1; | |
3368 | } | |
3369 | ||
b522adcd DW |
3370 | static int strict_blocks_to_sectors(const char *buf, sector_t *sectors) |
3371 | { | |
3372 | unsigned long long blocks; | |
3373 | sector_t new; | |
3374 | ||
b29bebd6 | 3375 | if (kstrtoull(buf, 10, &blocks) < 0) |
b522adcd DW |
3376 | return -EINVAL; |
3377 | ||
3378 | if (blocks & 1ULL << (8 * sizeof(blocks) - 1)) | |
3379 | return -EINVAL; /* sector conversion overflow */ | |
3380 | ||
3381 | new = blocks * 2; | |
3382 | if (new != blocks * 2) | |
3383 | return -EINVAL; /* unsigned long long to sector_t overflow */ | |
3384 | ||
3385 | *sectors = new; | |
3386 | return 0; | |
3387 | } | |
3388 | ||
83303b61 | 3389 | static ssize_t |
3cb03002 | 3390 | rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len) |
83303b61 | 3391 | { |
fd01b88c | 3392 | struct mddev *my_mddev = rdev->mddev; |
dd8ac336 | 3393 | sector_t oldsectors = rdev->sectors; |
b522adcd | 3394 | sector_t sectors; |
27c529bb | 3395 | |
f2076e7d SL |
3396 | if (test_bit(Journal, &rdev->flags)) |
3397 | return -EBUSY; | |
b522adcd | 3398 | if (strict_blocks_to_sectors(buf, §ors) < 0) |
d7027458 | 3399 | return -EINVAL; |
c6563a8c N |
3400 | if (rdev->data_offset != rdev->new_data_offset) |
3401 | return -EINVAL; /* too confusing */ | |
0cd17fec | 3402 | if (my_mddev->pers && rdev->raid_disk >= 0) { |
d7027458 | 3403 | if (my_mddev->persistent) { |
dd8ac336 AN |
3404 | sectors = super_types[my_mddev->major_version]. |
3405 | rdev_size_change(rdev, sectors); | |
3406 | if (!sectors) | |
0cd17fec | 3407 | return -EBUSY; |
dd8ac336 | 3408 | } else if (!sectors) |
77304d2a | 3409 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9) - |
dd8ac336 | 3410 | rdev->data_offset; |
a6468539 N |
3411 | if (!my_mddev->pers->resize) |
3412 | /* Cannot change size for RAID0 or Linear etc */ | |
3413 | return -EINVAL; | |
0cd17fec | 3414 | } |
dd8ac336 | 3415 | if (sectors < my_mddev->dev_sectors) |
7d3c6f87 | 3416 | return -EINVAL; /* component must fit device */ |
0cd17fec | 3417 | |
dd8ac336 AN |
3418 | rdev->sectors = sectors; |
3419 | if (sectors > oldsectors && my_mddev->external) { | |
8b1afc3d N |
3420 | /* Need to check that all other rdevs with the same |
3421 | * ->bdev do not overlap. 'rcu' is sufficient to walk | |
3422 | * the rdev lists safely. | |
3423 | * This check does not provide a hard guarantee, it | |
3424 | * just helps avoid dangerous mistakes. | |
c5d79adb | 3425 | */ |
fd01b88c | 3426 | struct mddev *mddev; |
c5d79adb | 3427 | int overlap = 0; |
159ec1fc | 3428 | struct list_head *tmp; |
c5d79adb | 3429 | |
8b1afc3d | 3430 | rcu_read_lock(); |
29ac4aa3 | 3431 | for_each_mddev(mddev, tmp) { |
3cb03002 | 3432 | struct md_rdev *rdev2; |
c5d79adb | 3433 | |
dafb20fa | 3434 | rdev_for_each(rdev2, mddev) |
f21e9ff7 N |
3435 | if (rdev->bdev == rdev2->bdev && |
3436 | rdev != rdev2 && | |
3437 | overlaps(rdev->data_offset, rdev->sectors, | |
3438 | rdev2->data_offset, | |
3439 | rdev2->sectors)) { | |
c5d79adb N |
3440 | overlap = 1; |
3441 | break; | |
3442 | } | |
c5d79adb N |
3443 | if (overlap) { |
3444 | mddev_put(mddev); | |
3445 | break; | |
3446 | } | |
3447 | } | |
8b1afc3d | 3448 | rcu_read_unlock(); |
c5d79adb N |
3449 | if (overlap) { |
3450 | /* Someone else could have slipped in a size | |
3451 | * change here, but doing so is just silly. | |
dd8ac336 | 3452 | * We put oldsectors back because we *know* it is |
c5d79adb N |
3453 | * safe, and trust userspace not to race with |
3454 | * itself | |
3455 | */ | |
dd8ac336 | 3456 | rdev->sectors = oldsectors; |
c5d79adb N |
3457 | return -EBUSY; |
3458 | } | |
3459 | } | |
83303b61 N |
3460 | return len; |
3461 | } | |
3462 | ||
3463 | static struct rdev_sysfs_entry rdev_size = | |
80ca3a44 | 3464 | __ATTR(size, S_IRUGO|S_IWUSR, rdev_size_show, rdev_size_store); |
83303b61 | 3465 | |
3cb03002 | 3466 | static ssize_t recovery_start_show(struct md_rdev *rdev, char *page) |
06e3c817 DW |
3467 | { |
3468 | unsigned long long recovery_start = rdev->recovery_offset; | |
3469 | ||
3470 | if (test_bit(In_sync, &rdev->flags) || | |
3471 | recovery_start == MaxSector) | |
3472 | return sprintf(page, "none\n"); | |
3473 | ||
3474 | return sprintf(page, "%llu\n", recovery_start); | |
3475 | } | |
3476 | ||
3cb03002 | 3477 | static ssize_t recovery_start_store(struct md_rdev *rdev, const char *buf, size_t len) |
06e3c817 DW |
3478 | { |
3479 | unsigned long long recovery_start; | |
3480 | ||
3481 | if (cmd_match(buf, "none")) | |
3482 | recovery_start = MaxSector; | |
b29bebd6 | 3483 | else if (kstrtoull(buf, 10, &recovery_start)) |
06e3c817 DW |
3484 | return -EINVAL; |
3485 | ||
3486 | if (rdev->mddev->pers && | |
3487 | rdev->raid_disk >= 0) | |
3488 | return -EBUSY; | |
3489 | ||
3490 | rdev->recovery_offset = recovery_start; | |
3491 | if (recovery_start == MaxSector) | |
3492 | set_bit(In_sync, &rdev->flags); | |
3493 | else | |
3494 | clear_bit(In_sync, &rdev->flags); | |
3495 | return len; | |
3496 | } | |
3497 | ||
3498 | static struct rdev_sysfs_entry rdev_recovery_start = | |
3499 | __ATTR(recovery_start, S_IRUGO|S_IWUSR, recovery_start_show, recovery_start_store); | |
3500 | ||
fc974ee2 VV |
3501 | /* sysfs access to bad-blocks list. |
3502 | * We present two files. | |
3503 | * 'bad-blocks' lists sector numbers and lengths of ranges that | |
3504 | * are recorded as bad. The list is truncated to fit within | |
3505 | * the one-page limit of sysfs. | |
3506 | * Writing "sector length" to this file adds an acknowledged | |
3507 | * bad block list. | |
3508 | * 'unacknowledged-bad-blocks' lists bad blocks that have not yet | |
3509 | * been acknowledged. Writing to this file adds bad blocks | |
3510 | * without acknowledging them. This is largely for testing. | |
3511 | */ | |
3cb03002 | 3512 | static ssize_t bb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3513 | { |
3514 | return badblocks_show(&rdev->badblocks, page, 0); | |
3515 | } | |
3cb03002 | 3516 | static ssize_t bb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 | 3517 | { |
de393cde N |
3518 | int rv = badblocks_store(&rdev->badblocks, page, len, 0); |
3519 | /* Maybe that ack was all we needed */ | |
3520 | if (test_and_clear_bit(BlockedBadBlocks, &rdev->flags)) | |
3521 | wake_up(&rdev->blocked_wait); | |
3522 | return rv; | |
16c791a5 N |
3523 | } |
3524 | static struct rdev_sysfs_entry rdev_bad_blocks = | |
3525 | __ATTR(bad_blocks, S_IRUGO|S_IWUSR, bb_show, bb_store); | |
3526 | ||
3cb03002 | 3527 | static ssize_t ubb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3528 | { |
3529 | return badblocks_show(&rdev->badblocks, page, 1); | |
3530 | } | |
3cb03002 | 3531 | static ssize_t ubb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 N |
3532 | { |
3533 | return badblocks_store(&rdev->badblocks, page, len, 1); | |
3534 | } | |
3535 | static struct rdev_sysfs_entry rdev_unack_bad_blocks = | |
3536 | __ATTR(unacknowledged_bad_blocks, S_IRUGO|S_IWUSR, ubb_show, ubb_store); | |
3537 | ||
664aed04 AP |
3538 | static ssize_t |
3539 | ppl_sector_show(struct md_rdev *rdev, char *page) | |
3540 | { | |
3541 | return sprintf(page, "%llu\n", (unsigned long long)rdev->ppl.sector); | |
3542 | } | |
3543 | ||
3544 | static ssize_t | |
3545 | ppl_sector_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3546 | { | |
3547 | unsigned long long sector; | |
3548 | ||
3549 | if (kstrtoull(buf, 10, §or) < 0) | |
3550 | return -EINVAL; | |
3551 | if (sector != (sector_t)sector) | |
3552 | return -EINVAL; | |
3553 | ||
3554 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3555 | rdev->raid_disk >= 0) | |
3556 | return -EBUSY; | |
3557 | ||
3558 | if (rdev->mddev->persistent) { | |
3559 | if (rdev->mddev->major_version == 0) | |
3560 | return -EINVAL; | |
3561 | if ((sector > rdev->sb_start && | |
3562 | sector - rdev->sb_start > S16_MAX) || | |
3563 | (sector < rdev->sb_start && | |
3564 | rdev->sb_start - sector > -S16_MIN)) | |
3565 | return -EINVAL; | |
3566 | rdev->ppl.offset = sector - rdev->sb_start; | |
3567 | } else if (!rdev->mddev->external) { | |
3568 | return -EBUSY; | |
3569 | } | |
3570 | rdev->ppl.sector = sector; | |
3571 | return len; | |
3572 | } | |
3573 | ||
3574 | static struct rdev_sysfs_entry rdev_ppl_sector = | |
3575 | __ATTR(ppl_sector, S_IRUGO|S_IWUSR, ppl_sector_show, ppl_sector_store); | |
3576 | ||
3577 | static ssize_t | |
3578 | ppl_size_show(struct md_rdev *rdev, char *page) | |
3579 | { | |
3580 | return sprintf(page, "%u\n", rdev->ppl.size); | |
3581 | } | |
3582 | ||
3583 | static ssize_t | |
3584 | ppl_size_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3585 | { | |
3586 | unsigned int size; | |
3587 | ||
3588 | if (kstrtouint(buf, 10, &size) < 0) | |
3589 | return -EINVAL; | |
3590 | ||
3591 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3592 | rdev->raid_disk >= 0) | |
3593 | return -EBUSY; | |
3594 | ||
3595 | if (rdev->mddev->persistent) { | |
3596 | if (rdev->mddev->major_version == 0) | |
3597 | return -EINVAL; | |
3598 | if (size > U16_MAX) | |
3599 | return -EINVAL; | |
3600 | } else if (!rdev->mddev->external) { | |
3601 | return -EBUSY; | |
3602 | } | |
3603 | rdev->ppl.size = size; | |
3604 | return len; | |
3605 | } | |
3606 | ||
3607 | static struct rdev_sysfs_entry rdev_ppl_size = | |
3608 | __ATTR(ppl_size, S_IRUGO|S_IWUSR, ppl_size_show, ppl_size_store); | |
3609 | ||
86e6ffdd N |
3610 | static struct attribute *rdev_default_attrs[] = { |
3611 | &rdev_state.attr, | |
4dbcdc75 | 3612 | &rdev_errors.attr, |
014236d2 | 3613 | &rdev_slot.attr, |
93c8cad0 | 3614 | &rdev_offset.attr, |
c6563a8c | 3615 | &rdev_new_offset.attr, |
83303b61 | 3616 | &rdev_size.attr, |
06e3c817 | 3617 | &rdev_recovery_start.attr, |
16c791a5 N |
3618 | &rdev_bad_blocks.attr, |
3619 | &rdev_unack_bad_blocks.attr, | |
664aed04 AP |
3620 | &rdev_ppl_sector.attr, |
3621 | &rdev_ppl_size.attr, | |
86e6ffdd N |
3622 | NULL, |
3623 | }; | |
3624 | static ssize_t | |
3625 | rdev_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
3626 | { | |
3627 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3628 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
86e6ffdd N |
3629 | |
3630 | if (!entry->show) | |
3631 | return -EIO; | |
758bfc8a | 3632 | if (!rdev->mddev) |
168b305b | 3633 | return -ENODEV; |
758bfc8a | 3634 | return entry->show(rdev, page); |
86e6ffdd N |
3635 | } |
3636 | ||
3637 | static ssize_t | |
3638 | rdev_attr_store(struct kobject *kobj, struct attribute *attr, | |
3639 | const char *page, size_t length) | |
3640 | { | |
3641 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3642 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
27c529bb | 3643 | ssize_t rv; |
fd01b88c | 3644 | struct mddev *mddev = rdev->mddev; |
86e6ffdd N |
3645 | |
3646 | if (!entry->store) | |
3647 | return -EIO; | |
67463acb N |
3648 | if (!capable(CAP_SYS_ADMIN)) |
3649 | return -EACCES; | |
c42d3240 | 3650 | rv = mddev ? mddev_lock(mddev) : -ENODEV; |
ca388059 | 3651 | if (!rv) { |
27c529bb | 3652 | if (rdev->mddev == NULL) |
c42d3240 | 3653 | rv = -ENODEV; |
27c529bb N |
3654 | else |
3655 | rv = entry->store(rdev, page, length); | |
6a51830e | 3656 | mddev_unlock(mddev); |
ca388059 N |
3657 | } |
3658 | return rv; | |
86e6ffdd N |
3659 | } |
3660 | ||
3661 | static void rdev_free(struct kobject *ko) | |
3662 | { | |
3cb03002 | 3663 | struct md_rdev *rdev = container_of(ko, struct md_rdev, kobj); |
86e6ffdd N |
3664 | kfree(rdev); |
3665 | } | |
52cf25d0 | 3666 | static const struct sysfs_ops rdev_sysfs_ops = { |
86e6ffdd N |
3667 | .show = rdev_attr_show, |
3668 | .store = rdev_attr_store, | |
3669 | }; | |
3670 | static struct kobj_type rdev_ktype = { | |
3671 | .release = rdev_free, | |
3672 | .sysfs_ops = &rdev_sysfs_ops, | |
3673 | .default_attrs = rdev_default_attrs, | |
3674 | }; | |
3675 | ||
3cb03002 | 3676 | int md_rdev_init(struct md_rdev *rdev) |
e8bb9a83 N |
3677 | { |
3678 | rdev->desc_nr = -1; | |
3679 | rdev->saved_raid_disk = -1; | |
3680 | rdev->raid_disk = -1; | |
3681 | rdev->flags = 0; | |
3682 | rdev->data_offset = 0; | |
c6563a8c | 3683 | rdev->new_data_offset = 0; |
e8bb9a83 | 3684 | rdev->sb_events = 0; |
0e3ef49e | 3685 | rdev->last_read_error = 0; |
2699b672 N |
3686 | rdev->sb_loaded = 0; |
3687 | rdev->bb_page = NULL; | |
e8bb9a83 N |
3688 | atomic_set(&rdev->nr_pending, 0); |
3689 | atomic_set(&rdev->read_errors, 0); | |
3690 | atomic_set(&rdev->corrected_errors, 0); | |
3691 | ||
3692 | INIT_LIST_HEAD(&rdev->same_set); | |
3693 | init_waitqueue_head(&rdev->blocked_wait); | |
2230dfe4 N |
3694 | |
3695 | /* Add space to store bad block list. | |
3696 | * This reserves the space even on arrays where it cannot | |
3697 | * be used - I wonder if that matters | |
3698 | */ | |
fc974ee2 | 3699 | return badblocks_init(&rdev->badblocks, 0); |
e8bb9a83 N |
3700 | } |
3701 | EXPORT_SYMBOL_GPL(md_rdev_init); | |
1da177e4 LT |
3702 | /* |
3703 | * Import a device. If 'super_format' >= 0, then sanity check the superblock | |
3704 | * | |
3705 | * mark the device faulty if: | |
3706 | * | |
3707 | * - the device is nonexistent (zero size) | |
3708 | * - the device has no valid superblock | |
3709 | * | |
3710 | * a faulty rdev _never_ has rdev->sb set. | |
3711 | */ | |
3cb03002 | 3712 | static struct md_rdev *md_import_device(dev_t newdev, int super_format, int super_minor) |
1da177e4 LT |
3713 | { |
3714 | char b[BDEVNAME_SIZE]; | |
3715 | int err; | |
3cb03002 | 3716 | struct md_rdev *rdev; |
1da177e4 LT |
3717 | sector_t size; |
3718 | ||
9ffae0cf | 3719 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
9d48739e | 3720 | if (!rdev) |
1da177e4 | 3721 | return ERR_PTR(-ENOMEM); |
1da177e4 | 3722 | |
2230dfe4 N |
3723 | err = md_rdev_init(rdev); |
3724 | if (err) | |
3725 | goto abort_free; | |
3726 | err = alloc_disk_sb(rdev); | |
3727 | if (err) | |
1da177e4 LT |
3728 | goto abort_free; |
3729 | ||
c5d79adb | 3730 | err = lock_rdev(rdev, newdev, super_format == -2); |
1da177e4 LT |
3731 | if (err) |
3732 | goto abort_free; | |
3733 | ||
f9cb074b | 3734 | kobject_init(&rdev->kobj, &rdev_ktype); |
86e6ffdd | 3735 | |
77304d2a | 3736 | size = i_size_read(rdev->bdev->bd_inode) >> BLOCK_SIZE_BITS; |
1da177e4 | 3737 | if (!size) { |
9d48739e | 3738 | pr_warn("md: %s has zero or unknown size, marking faulty!\n", |
1da177e4 LT |
3739 | bdevname(rdev->bdev,b)); |
3740 | err = -EINVAL; | |
3741 | goto abort_free; | |
3742 | } | |
3743 | ||
3744 | if (super_format >= 0) { | |
3745 | err = super_types[super_format]. | |
3746 | load_super(rdev, NULL, super_minor); | |
3747 | if (err == -EINVAL) { | |
9d48739e | 3748 | pr_warn("md: %s does not have a valid v%d.%d superblock, not importing!\n", |
df968c4e | 3749 | bdevname(rdev->bdev,b), |
9d48739e | 3750 | super_format, super_minor); |
1da177e4 LT |
3751 | goto abort_free; |
3752 | } | |
3753 | if (err < 0) { | |
9d48739e | 3754 | pr_warn("md: could not read %s's sb, not importing!\n", |
1da177e4 LT |
3755 | bdevname(rdev->bdev,b)); |
3756 | goto abort_free; | |
3757 | } | |
3758 | } | |
6bfe0b49 | 3759 | |
1da177e4 LT |
3760 | return rdev; |
3761 | ||
3762 | abort_free: | |
2699b672 N |
3763 | if (rdev->bdev) |
3764 | unlock_rdev(rdev); | |
545c8795 | 3765 | md_rdev_clear(rdev); |
1da177e4 LT |
3766 | kfree(rdev); |
3767 | return ERR_PTR(err); | |
3768 | } | |
3769 | ||
3770 | /* | |
3771 | * Check a full RAID array for plausibility | |
3772 | */ | |
3773 | ||
6a5cb53a | 3774 | static int analyze_sbs(struct mddev *mddev) |
1da177e4 LT |
3775 | { |
3776 | int i; | |
3cb03002 | 3777 | struct md_rdev *rdev, *freshest, *tmp; |
1da177e4 LT |
3778 | char b[BDEVNAME_SIZE]; |
3779 | ||
3780 | freshest = NULL; | |
dafb20fa | 3781 | rdev_for_each_safe(rdev, tmp, mddev) |
1da177e4 LT |
3782 | switch (super_types[mddev->major_version]. |
3783 | load_super(rdev, freshest, mddev->minor_version)) { | |
3784 | case 1: | |
3785 | freshest = rdev; | |
3786 | break; | |
3787 | case 0: | |
3788 | break; | |
3789 | default: | |
9d48739e | 3790 | pr_warn("md: fatal superblock inconsistency in %s -- removing from array\n", |
1da177e4 | 3791 | bdevname(rdev->bdev,b)); |
fb56dfef | 3792 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3793 | } |
3794 | ||
6a5cb53a YY |
3795 | /* Cannot find a valid fresh disk */ |
3796 | if (!freshest) { | |
3797 | pr_warn("md: cannot find a valid disk\n"); | |
3798 | return -EINVAL; | |
3799 | } | |
3800 | ||
1da177e4 LT |
3801 | super_types[mddev->major_version]. |
3802 | validate_super(mddev, freshest); | |
3803 | ||
3804 | i = 0; | |
dafb20fa | 3805 | rdev_for_each_safe(rdev, tmp, mddev) { |
233fca36 N |
3806 | if (mddev->max_disks && |
3807 | (rdev->desc_nr >= mddev->max_disks || | |
3808 | i > mddev->max_disks)) { | |
9d48739e N |
3809 | pr_warn("md: %s: %s: only %d devices permitted\n", |
3810 | mdname(mddev), bdevname(rdev->bdev, b), | |
3811 | mddev->max_disks); | |
fb56dfef | 3812 | md_kick_rdev_from_array(rdev); |
de01dfad N |
3813 | continue; |
3814 | } | |
1aee41f6 | 3815 | if (rdev != freshest) { |
1da177e4 LT |
3816 | if (super_types[mddev->major_version]. |
3817 | validate_super(mddev, rdev)) { | |
9d48739e | 3818 | pr_warn("md: kicking non-fresh %s from array!\n", |
1da177e4 | 3819 | bdevname(rdev->bdev,b)); |
fb56dfef | 3820 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3821 | continue; |
3822 | } | |
1aee41f6 | 3823 | } |
1da177e4 LT |
3824 | if (mddev->level == LEVEL_MULTIPATH) { |
3825 | rdev->desc_nr = i++; | |
3826 | rdev->raid_disk = rdev->desc_nr; | |
b2d444d7 | 3827 | set_bit(In_sync, &rdev->flags); |
f2076e7d SL |
3828 | } else if (rdev->raid_disk >= |
3829 | (mddev->raid_disks - min(0, mddev->delta_disks)) && | |
3830 | !test_bit(Journal, &rdev->flags)) { | |
a778b73f N |
3831 | rdev->raid_disk = -1; |
3832 | clear_bit(In_sync, &rdev->flags); | |
1da177e4 LT |
3833 | } |
3834 | } | |
6a5cb53a YY |
3835 | |
3836 | return 0; | |
1da177e4 LT |
3837 | } |
3838 | ||
72e02075 N |
3839 | /* Read a fixed-point number. |
3840 | * Numbers in sysfs attributes should be in "standard" units where | |
3841 | * possible, so time should be in seconds. | |
f72ffdd6 | 3842 | * However we internally use a a much smaller unit such as |
72e02075 N |
3843 | * milliseconds or jiffies. |
3844 | * This function takes a decimal number with a possible fractional | |
3845 | * component, and produces an integer which is the result of | |
3846 | * multiplying that number by 10^'scale'. | |
3847 | * all without any floating-point arithmetic. | |
3848 | */ | |
3849 | int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale) | |
3850 | { | |
3851 | unsigned long result = 0; | |
3852 | long decimals = -1; | |
3853 | while (isdigit(*cp) || (*cp == '.' && decimals < 0)) { | |
3854 | if (*cp == '.') | |
3855 | decimals = 0; | |
3856 | else if (decimals < scale) { | |
3857 | unsigned int value; | |
3858 | value = *cp - '0'; | |
3859 | result = result * 10 + value; | |
3860 | if (decimals >= 0) | |
3861 | decimals++; | |
3862 | } | |
3863 | cp++; | |
3864 | } | |
3865 | if (*cp == '\n') | |
3866 | cp++; | |
3867 | if (*cp) | |
3868 | return -EINVAL; | |
3869 | if (decimals < 0) | |
3870 | decimals = 0; | |
cf891607 | 3871 | *res = result * int_pow(10, scale - decimals); |
72e02075 N |
3872 | return 0; |
3873 | } | |
3874 | ||
16f17b39 | 3875 | static ssize_t |
fd01b88c | 3876 | safe_delay_show(struct mddev *mddev, char *page) |
16f17b39 N |
3877 | { |
3878 | int msec = (mddev->safemode_delay*1000)/HZ; | |
3879 | return sprintf(page, "%d.%03d\n", msec/1000, msec%1000); | |
3880 | } | |
3881 | static ssize_t | |
fd01b88c | 3882 | safe_delay_store(struct mddev *mddev, const char *cbuf, size_t len) |
16f17b39 | 3883 | { |
16f17b39 | 3884 | unsigned long msec; |
97ce0a7f | 3885 | |
28c1b9fd | 3886 | if (mddev_is_clustered(mddev)) { |
9d48739e | 3887 | pr_warn("md: Safemode is disabled for clustered mode\n"); |
28c1b9fd GR |
3888 | return -EINVAL; |
3889 | } | |
3890 | ||
72e02075 | 3891 | if (strict_strtoul_scaled(cbuf, &msec, 3) < 0) |
16f17b39 | 3892 | return -EINVAL; |
16f17b39 N |
3893 | if (msec == 0) |
3894 | mddev->safemode_delay = 0; | |
3895 | else { | |
19052c0e | 3896 | unsigned long old_delay = mddev->safemode_delay; |
1b30e66f N |
3897 | unsigned long new_delay = (msec*HZ)/1000; |
3898 | ||
3899 | if (new_delay == 0) | |
3900 | new_delay = 1; | |
3901 | mddev->safemode_delay = new_delay; | |
3902 | if (new_delay < old_delay || old_delay == 0) | |
3903 | mod_timer(&mddev->safemode_timer, jiffies+1); | |
16f17b39 N |
3904 | } |
3905 | return len; | |
3906 | } | |
3907 | static struct md_sysfs_entry md_safe_delay = | |
80ca3a44 | 3908 | __ATTR(safe_mode_delay, S_IRUGO|S_IWUSR,safe_delay_show, safe_delay_store); |
16f17b39 | 3909 | |
eae1701f | 3910 | static ssize_t |
fd01b88c | 3911 | level_show(struct mddev *mddev, char *page) |
eae1701f | 3912 | { |
36d091f4 N |
3913 | struct md_personality *p; |
3914 | int ret; | |
3915 | spin_lock(&mddev->lock); | |
3916 | p = mddev->pers; | |
d9d166c2 | 3917 | if (p) |
36d091f4 | 3918 | ret = sprintf(page, "%s\n", p->name); |
d9d166c2 | 3919 | else if (mddev->clevel[0]) |
36d091f4 | 3920 | ret = sprintf(page, "%s\n", mddev->clevel); |
d9d166c2 | 3921 | else if (mddev->level != LEVEL_NONE) |
36d091f4 | 3922 | ret = sprintf(page, "%d\n", mddev->level); |
d9d166c2 | 3923 | else |
36d091f4 N |
3924 | ret = 0; |
3925 | spin_unlock(&mddev->lock); | |
3926 | return ret; | |
eae1701f N |
3927 | } |
3928 | ||
d9d166c2 | 3929 | static ssize_t |
fd01b88c | 3930 | level_store(struct mddev *mddev, const char *buf, size_t len) |
d9d166c2 | 3931 | { |
f2859af6 | 3932 | char clevel[16]; |
6791875e N |
3933 | ssize_t rv; |
3934 | size_t slen = len; | |
db721d32 | 3935 | struct md_personality *pers, *oldpers; |
f2859af6 | 3936 | long level; |
db721d32 | 3937 | void *priv, *oldpriv; |
3cb03002 | 3938 | struct md_rdev *rdev; |
245f46c2 | 3939 | |
6791875e N |
3940 | if (slen == 0 || slen >= sizeof(clevel)) |
3941 | return -EINVAL; | |
3942 | ||
3943 | rv = mddev_lock(mddev); | |
3944 | if (rv) | |
3945 | return rv; | |
3946 | ||
245f46c2 | 3947 | if (mddev->pers == NULL) { |
6791875e N |
3948 | strncpy(mddev->clevel, buf, slen); |
3949 | if (mddev->clevel[slen-1] == '\n') | |
3950 | slen--; | |
3951 | mddev->clevel[slen] = 0; | |
245f46c2 | 3952 | mddev->level = LEVEL_NONE; |
6791875e N |
3953 | rv = len; |
3954 | goto out_unlock; | |
245f46c2 | 3955 | } |
6791875e | 3956 | rv = -EROFS; |
bd8839e0 | 3957 | if (mddev->ro) |
6791875e | 3958 | goto out_unlock; |
245f46c2 N |
3959 | |
3960 | /* request to change the personality. Need to ensure: | |
3961 | * - array is not engaged in resync/recovery/reshape | |
3962 | * - old personality can be suspended | |
3963 | * - new personality will access other array. | |
3964 | */ | |
3965 | ||
6791875e | 3966 | rv = -EBUSY; |
bb4f1e9d | 3967 | if (mddev->sync_thread || |
f851b60d | 3968 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
bb4f1e9d N |
3969 | mddev->reshape_position != MaxSector || |
3970 | mddev->sysfs_active) | |
6791875e | 3971 | goto out_unlock; |
245f46c2 | 3972 | |
6791875e | 3973 | rv = -EINVAL; |
245f46c2 | 3974 | if (!mddev->pers->quiesce) { |
9d48739e N |
3975 | pr_warn("md: %s: %s does not support online personality change\n", |
3976 | mdname(mddev), mddev->pers->name); | |
6791875e | 3977 | goto out_unlock; |
245f46c2 N |
3978 | } |
3979 | ||
3980 | /* Now find the new personality */ | |
6791875e N |
3981 | strncpy(clevel, buf, slen); |
3982 | if (clevel[slen-1] == '\n') | |
3983 | slen--; | |
3984 | clevel[slen] = 0; | |
b29bebd6 | 3985 | if (kstrtol(clevel, 10, &level)) |
f2859af6 | 3986 | level = LEVEL_NONE; |
245f46c2 | 3987 | |
f2859af6 DW |
3988 | if (request_module("md-%s", clevel) != 0) |
3989 | request_module("md-level-%s", clevel); | |
245f46c2 | 3990 | spin_lock(&pers_lock); |
f2859af6 | 3991 | pers = find_pers(level, clevel); |
245f46c2 N |
3992 | if (!pers || !try_module_get(pers->owner)) { |
3993 | spin_unlock(&pers_lock); | |
9d48739e | 3994 | pr_warn("md: personality %s not loaded\n", clevel); |
6791875e N |
3995 | rv = -EINVAL; |
3996 | goto out_unlock; | |
245f46c2 N |
3997 | } |
3998 | spin_unlock(&pers_lock); | |
3999 | ||
4000 | if (pers == mddev->pers) { | |
4001 | /* Nothing to do! */ | |
4002 | module_put(pers->owner); | |
6791875e N |
4003 | rv = len; |
4004 | goto out_unlock; | |
245f46c2 N |
4005 | } |
4006 | if (!pers->takeover) { | |
4007 | module_put(pers->owner); | |
9d48739e N |
4008 | pr_warn("md: %s: %s does not support personality takeover\n", |
4009 | mdname(mddev), clevel); | |
6791875e N |
4010 | rv = -EINVAL; |
4011 | goto out_unlock; | |
245f46c2 N |
4012 | } |
4013 | ||
dafb20fa | 4014 | rdev_for_each(rdev, mddev) |
e93f68a1 N |
4015 | rdev->new_raid_disk = rdev->raid_disk; |
4016 | ||
245f46c2 N |
4017 | /* ->takeover must set new_* and/or delta_disks |
4018 | * if it succeeds, and may set them when it fails. | |
4019 | */ | |
4020 | priv = pers->takeover(mddev); | |
4021 | if (IS_ERR(priv)) { | |
4022 | mddev->new_level = mddev->level; | |
4023 | mddev->new_layout = mddev->layout; | |
664e7c41 | 4024 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
245f46c2 N |
4025 | mddev->raid_disks -= mddev->delta_disks; |
4026 | mddev->delta_disks = 0; | |
2c810cdd | 4027 | mddev->reshape_backwards = 0; |
245f46c2 | 4028 | module_put(pers->owner); |
9d48739e N |
4029 | pr_warn("md: %s: %s would not accept array\n", |
4030 | mdname(mddev), clevel); | |
6791875e N |
4031 | rv = PTR_ERR(priv); |
4032 | goto out_unlock; | |
245f46c2 N |
4033 | } |
4034 | ||
4035 | /* Looks like we have a winner */ | |
4036 | mddev_suspend(mddev); | |
5aa61f42 | 4037 | mddev_detach(mddev); |
36d091f4 N |
4038 | |
4039 | spin_lock(&mddev->lock); | |
db721d32 N |
4040 | oldpers = mddev->pers; |
4041 | oldpriv = mddev->private; | |
4042 | mddev->pers = pers; | |
4043 | mddev->private = priv; | |
4044 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); | |
4045 | mddev->level = mddev->new_level; | |
4046 | mddev->layout = mddev->new_layout; | |
4047 | mddev->chunk_sectors = mddev->new_chunk_sectors; | |
4048 | mddev->delta_disks = 0; | |
4049 | mddev->reshape_backwards = 0; | |
4050 | mddev->degraded = 0; | |
36d091f4 | 4051 | spin_unlock(&mddev->lock); |
db721d32 N |
4052 | |
4053 | if (oldpers->sync_request == NULL && | |
4054 | mddev->external) { | |
4055 | /* We are converting from a no-redundancy array | |
4056 | * to a redundancy array and metadata is managed | |
4057 | * externally so we need to be sure that writes | |
4058 | * won't block due to a need to transition | |
4059 | * clean->dirty | |
4060 | * until external management is started. | |
4061 | */ | |
4062 | mddev->in_sync = 0; | |
4063 | mddev->safemode_delay = 0; | |
4064 | mddev->safemode = 0; | |
4065 | } | |
f72ffdd6 | 4066 | |
db721d32 N |
4067 | oldpers->free(mddev, oldpriv); |
4068 | ||
4069 | if (oldpers->sync_request == NULL && | |
a64c876f N |
4070 | pers->sync_request != NULL) { |
4071 | /* need to add the md_redundancy_group */ | |
4072 | if (sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
4073 | pr_warn("md: cannot register extra attributes for %s\n", |
4074 | mdname(mddev)); | |
388975cc | 4075 | mddev->sysfs_action = sysfs_get_dirent(mddev->kobj.sd, "sync_action"); |
e8efa9b8 JB |
4076 | mddev->sysfs_completed = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_completed"); |
4077 | mddev->sysfs_degraded = sysfs_get_dirent_safe(mddev->kobj.sd, "degraded"); | |
f72ffdd6 | 4078 | } |
db721d32 | 4079 | if (oldpers->sync_request != NULL && |
a64c876f N |
4080 | pers->sync_request == NULL) { |
4081 | /* need to remove the md_redundancy_group */ | |
4082 | if (mddev->to_remove == NULL) | |
4083 | mddev->to_remove = &md_redundancy_group; | |
4084 | } | |
4085 | ||
4cb9da7d AO |
4086 | module_put(oldpers->owner); |
4087 | ||
dafb20fa | 4088 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
4089 | if (rdev->raid_disk < 0) |
4090 | continue; | |
bf2cb0da | 4091 | if (rdev->new_raid_disk >= mddev->raid_disks) |
e93f68a1 N |
4092 | rdev->new_raid_disk = -1; |
4093 | if (rdev->new_raid_disk == rdev->raid_disk) | |
4094 | continue; | |
36fad858 | 4095 | sysfs_unlink_rdev(mddev, rdev); |
e93f68a1 | 4096 | } |
dafb20fa | 4097 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
4098 | if (rdev->raid_disk < 0) |
4099 | continue; | |
4100 | if (rdev->new_raid_disk == rdev->raid_disk) | |
4101 | continue; | |
4102 | rdev->raid_disk = rdev->new_raid_disk; | |
4103 | if (rdev->raid_disk < 0) | |
3a981b03 | 4104 | clear_bit(In_sync, &rdev->flags); |
e93f68a1 | 4105 | else { |
36fad858 | 4106 | if (sysfs_link_rdev(mddev, rdev)) |
9d48739e N |
4107 | pr_warn("md: cannot register rd%d for %s after level change\n", |
4108 | rdev->raid_disk, mdname(mddev)); | |
3a981b03 | 4109 | } |
e93f68a1 N |
4110 | } |
4111 | ||
db721d32 | 4112 | if (pers->sync_request == NULL) { |
9af204cf TM |
4113 | /* this is now an array without redundancy, so |
4114 | * it must always be in_sync | |
4115 | */ | |
4116 | mddev->in_sync = 1; | |
4117 | del_timer_sync(&mddev->safemode_timer); | |
4118 | } | |
02e5f5c0 | 4119 | blk_set_stacking_limits(&mddev->queue->limits); |
245f46c2 | 4120 | pers->run(mddev); |
2953079c | 4121 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
47525e59 | 4122 | mddev_resume(mddev); |
830778a1 N |
4123 | if (!mddev->thread) |
4124 | md_update_sb(mddev, 1); | |
e1a86dbb | 4125 | sysfs_notify_dirent_safe(mddev->sysfs_level); |
bb7f8d22 | 4126 | md_new_event(mddev); |
6791875e N |
4127 | rv = len; |
4128 | out_unlock: | |
4129 | mddev_unlock(mddev); | |
d9d166c2 N |
4130 | return rv; |
4131 | } | |
4132 | ||
4133 | static struct md_sysfs_entry md_level = | |
80ca3a44 | 4134 | __ATTR(level, S_IRUGO|S_IWUSR, level_show, level_store); |
eae1701f | 4135 | |
d4dbd025 | 4136 | static ssize_t |
fd01b88c | 4137 | layout_show(struct mddev *mddev, char *page) |
d4dbd025 N |
4138 | { |
4139 | /* just a number, not meaningful for all levels */ | |
08a02ecd N |
4140 | if (mddev->reshape_position != MaxSector && |
4141 | mddev->layout != mddev->new_layout) | |
4142 | return sprintf(page, "%d (%d)\n", | |
4143 | mddev->new_layout, mddev->layout); | |
d4dbd025 N |
4144 | return sprintf(page, "%d\n", mddev->layout); |
4145 | } | |
4146 | ||
4147 | static ssize_t | |
fd01b88c | 4148 | layout_store(struct mddev *mddev, const char *buf, size_t len) |
d4dbd025 | 4149 | { |
4c9309c0 | 4150 | unsigned int n; |
6791875e | 4151 | int err; |
d4dbd025 | 4152 | |
4c9309c0 AD |
4153 | err = kstrtouint(buf, 10, &n); |
4154 | if (err < 0) | |
4155 | return err; | |
6791875e N |
4156 | err = mddev_lock(mddev); |
4157 | if (err) | |
4158 | return err; | |
d4dbd025 | 4159 | |
b3546035 | 4160 | if (mddev->pers) { |
50ac168a | 4161 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
4162 | err = -EBUSY; |
4163 | else if (mddev->ro) | |
4164 | err = -EROFS; | |
4165 | else { | |
4166 | mddev->new_layout = n; | |
4167 | err = mddev->pers->check_reshape(mddev); | |
4168 | if (err) | |
4169 | mddev->new_layout = mddev->layout; | |
597a711b | 4170 | } |
b3546035 | 4171 | } else { |
08a02ecd | 4172 | mddev->new_layout = n; |
b3546035 N |
4173 | if (mddev->reshape_position == MaxSector) |
4174 | mddev->layout = n; | |
4175 | } | |
6791875e N |
4176 | mddev_unlock(mddev); |
4177 | return err ?: len; | |
d4dbd025 N |
4178 | } |
4179 | static struct md_sysfs_entry md_layout = | |
80ca3a44 | 4180 | __ATTR(layout, S_IRUGO|S_IWUSR, layout_show, layout_store); |
d4dbd025 | 4181 | |
eae1701f | 4182 | static ssize_t |
fd01b88c | 4183 | raid_disks_show(struct mddev *mddev, char *page) |
eae1701f | 4184 | { |
bb636547 N |
4185 | if (mddev->raid_disks == 0) |
4186 | return 0; | |
08a02ecd N |
4187 | if (mddev->reshape_position != MaxSector && |
4188 | mddev->delta_disks != 0) | |
4189 | return sprintf(page, "%d (%d)\n", mddev->raid_disks, | |
4190 | mddev->raid_disks - mddev->delta_disks); | |
eae1701f N |
4191 | return sprintf(page, "%d\n", mddev->raid_disks); |
4192 | } | |
4193 | ||
fd01b88c | 4194 | static int update_raid_disks(struct mddev *mddev, int raid_disks); |
da943b99 N |
4195 | |
4196 | static ssize_t | |
fd01b88c | 4197 | raid_disks_store(struct mddev *mddev, const char *buf, size_t len) |
da943b99 | 4198 | { |
4c9309c0 | 4199 | unsigned int n; |
6791875e | 4200 | int err; |
da943b99 | 4201 | |
4c9309c0 AD |
4202 | err = kstrtouint(buf, 10, &n); |
4203 | if (err < 0) | |
4204 | return err; | |
da943b99 | 4205 | |
6791875e N |
4206 | err = mddev_lock(mddev); |
4207 | if (err) | |
4208 | return err; | |
da943b99 | 4209 | if (mddev->pers) |
6791875e | 4210 | err = update_raid_disks(mddev, n); |
08a02ecd | 4211 | else if (mddev->reshape_position != MaxSector) { |
c6563a8c | 4212 | struct md_rdev *rdev; |
08a02ecd | 4213 | int olddisks = mddev->raid_disks - mddev->delta_disks; |
c6563a8c | 4214 | |
6791875e | 4215 | err = -EINVAL; |
c6563a8c N |
4216 | rdev_for_each(rdev, mddev) { |
4217 | if (olddisks < n && | |
4218 | rdev->data_offset < rdev->new_data_offset) | |
6791875e | 4219 | goto out_unlock; |
c6563a8c N |
4220 | if (olddisks > n && |
4221 | rdev->data_offset > rdev->new_data_offset) | |
6791875e | 4222 | goto out_unlock; |
c6563a8c | 4223 | } |
6791875e | 4224 | err = 0; |
08a02ecd N |
4225 | mddev->delta_disks = n - olddisks; |
4226 | mddev->raid_disks = n; | |
2c810cdd | 4227 | mddev->reshape_backwards = (mddev->delta_disks < 0); |
08a02ecd | 4228 | } else |
da943b99 | 4229 | mddev->raid_disks = n; |
6791875e N |
4230 | out_unlock: |
4231 | mddev_unlock(mddev); | |
4232 | return err ? err : len; | |
da943b99 N |
4233 | } |
4234 | static struct md_sysfs_entry md_raid_disks = | |
80ca3a44 | 4235 | __ATTR(raid_disks, S_IRUGO|S_IWUSR, raid_disks_show, raid_disks_store); |
eae1701f | 4236 | |
ec164d07 SP |
4237 | static ssize_t |
4238 | uuid_show(struct mddev *mddev, char *page) | |
4239 | { | |
4240 | return sprintf(page, "%pU\n", mddev->uuid); | |
4241 | } | |
4242 | static struct md_sysfs_entry md_uuid = | |
4243 | __ATTR(uuid, S_IRUGO, uuid_show, NULL); | |
4244 | ||
3b34380a | 4245 | static ssize_t |
fd01b88c | 4246 | chunk_size_show(struct mddev *mddev, char *page) |
3b34380a | 4247 | { |
08a02ecd | 4248 | if (mddev->reshape_position != MaxSector && |
664e7c41 AN |
4249 | mddev->chunk_sectors != mddev->new_chunk_sectors) |
4250 | return sprintf(page, "%d (%d)\n", | |
4251 | mddev->new_chunk_sectors << 9, | |
9d8f0363 AN |
4252 | mddev->chunk_sectors << 9); |
4253 | return sprintf(page, "%d\n", mddev->chunk_sectors << 9); | |
3b34380a N |
4254 | } |
4255 | ||
4256 | static ssize_t | |
fd01b88c | 4257 | chunk_size_store(struct mddev *mddev, const char *buf, size_t len) |
3b34380a | 4258 | { |
4c9309c0 | 4259 | unsigned long n; |
6791875e | 4260 | int err; |
3b34380a | 4261 | |
4c9309c0 AD |
4262 | err = kstrtoul(buf, 10, &n); |
4263 | if (err < 0) | |
4264 | return err; | |
3b34380a | 4265 | |
6791875e N |
4266 | err = mddev_lock(mddev); |
4267 | if (err) | |
4268 | return err; | |
b3546035 | 4269 | if (mddev->pers) { |
50ac168a | 4270 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
4271 | err = -EBUSY; |
4272 | else if (mddev->ro) | |
4273 | err = -EROFS; | |
4274 | else { | |
4275 | mddev->new_chunk_sectors = n >> 9; | |
4276 | err = mddev->pers->check_reshape(mddev); | |
4277 | if (err) | |
4278 | mddev->new_chunk_sectors = mddev->chunk_sectors; | |
597a711b | 4279 | } |
b3546035 | 4280 | } else { |
664e7c41 | 4281 | mddev->new_chunk_sectors = n >> 9; |
b3546035 | 4282 | if (mddev->reshape_position == MaxSector) |
9d8f0363 | 4283 | mddev->chunk_sectors = n >> 9; |
b3546035 | 4284 | } |
6791875e N |
4285 | mddev_unlock(mddev); |
4286 | return err ?: len; | |
3b34380a N |
4287 | } |
4288 | static struct md_sysfs_entry md_chunk_size = | |
80ca3a44 | 4289 | __ATTR(chunk_size, S_IRUGO|S_IWUSR, chunk_size_show, chunk_size_store); |
3b34380a | 4290 | |
a94213b1 | 4291 | static ssize_t |
fd01b88c | 4292 | resync_start_show(struct mddev *mddev, char *page) |
a94213b1 | 4293 | { |
d1a7c503 N |
4294 | if (mddev->recovery_cp == MaxSector) |
4295 | return sprintf(page, "none\n"); | |
a94213b1 N |
4296 | return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp); |
4297 | } | |
4298 | ||
4299 | static ssize_t | |
fd01b88c | 4300 | resync_start_store(struct mddev *mddev, const char *buf, size_t len) |
a94213b1 | 4301 | { |
4c9309c0 | 4302 | unsigned long long n; |
6791875e | 4303 | int err; |
4c9309c0 AD |
4304 | |
4305 | if (cmd_match(buf, "none")) | |
4306 | n = MaxSector; | |
4307 | else { | |
4308 | err = kstrtoull(buf, 10, &n); | |
4309 | if (err < 0) | |
4310 | return err; | |
4311 | if (n != (sector_t)n) | |
4312 | return -EINVAL; | |
4313 | } | |
a94213b1 | 4314 | |
6791875e N |
4315 | err = mddev_lock(mddev); |
4316 | if (err) | |
4317 | return err; | |
b098636c | 4318 | if (mddev->pers && !test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) |
6791875e | 4319 | err = -EBUSY; |
a94213b1 | 4320 | |
6791875e N |
4321 | if (!err) { |
4322 | mddev->recovery_cp = n; | |
4323 | if (mddev->pers) | |
2953079c | 4324 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
6791875e N |
4325 | } |
4326 | mddev_unlock(mddev); | |
4327 | return err ?: len; | |
a94213b1 N |
4328 | } |
4329 | static struct md_sysfs_entry md_resync_start = | |
750f199e N |
4330 | __ATTR_PREALLOC(resync_start, S_IRUGO|S_IWUSR, |
4331 | resync_start_show, resync_start_store); | |
a94213b1 | 4332 | |
9e653b63 N |
4333 | /* |
4334 | * The array state can be: | |
4335 | * | |
4336 | * clear | |
4337 | * No devices, no size, no level | |
4338 | * Equivalent to STOP_ARRAY ioctl | |
4339 | * inactive | |
4340 | * May have some settings, but array is not active | |
4341 | * all IO results in error | |
4342 | * When written, doesn't tear down array, but just stops it | |
4343 | * suspended (not supported yet) | |
4344 | * All IO requests will block. The array can be reconfigured. | |
910d8cb3 | 4345 | * Writing this, if accepted, will block until array is quiescent |
9e653b63 N |
4346 | * readonly |
4347 | * no resync can happen. no superblocks get written. | |
4348 | * write requests fail | |
4349 | * read-auto | |
4350 | * like readonly, but behaves like 'clean' on a write request. | |
4351 | * | |
4352 | * clean - no pending writes, but otherwise active. | |
4353 | * When written to inactive array, starts without resync | |
4354 | * If a write request arrives then | |
4355 | * if metadata is known, mark 'dirty' and switch to 'active'. | |
4356 | * if not known, block and switch to write-pending | |
4357 | * If written to an active array that has pending writes, then fails. | |
4358 | * active | |
4359 | * fully active: IO and resync can be happening. | |
4360 | * When written to inactive array, starts with resync | |
4361 | * | |
4362 | * write-pending | |
4363 | * clean, but writes are blocked waiting for 'active' to be written. | |
4364 | * | |
4365 | * active-idle | |
4366 | * like active, but no writes have been seen for a while (100msec). | |
4367 | * | |
62f7b198 GP |
4368 | * broken |
4369 | * RAID0/LINEAR-only: same as clean, but array is missing a member. | |
4370 | * It's useful because RAID0/LINEAR mounted-arrays aren't stopped | |
4371 | * when a member is gone, so this state will at least alert the | |
4372 | * user that something is wrong. | |
9e653b63 N |
4373 | */ |
4374 | enum array_state { clear, inactive, suspended, readonly, read_auto, clean, active, | |
62f7b198 | 4375 | write_pending, active_idle, broken, bad_word}; |
05381954 | 4376 | static char *array_states[] = { |
9e653b63 | 4377 | "clear", "inactive", "suspended", "readonly", "read-auto", "clean", "active", |
62f7b198 | 4378 | "write-pending", "active-idle", "broken", NULL }; |
9e653b63 N |
4379 | |
4380 | static int match_word(const char *word, char **list) | |
4381 | { | |
4382 | int n; | |
4383 | for (n=0; list[n]; n++) | |
4384 | if (cmd_match(word, list[n])) | |
4385 | break; | |
4386 | return n; | |
4387 | } | |
4388 | ||
4389 | static ssize_t | |
fd01b88c | 4390 | array_state_show(struct mddev *mddev, char *page) |
9e653b63 N |
4391 | { |
4392 | enum array_state st = inactive; | |
4393 | ||
62f7b198 | 4394 | if (mddev->pers && !test_bit(MD_NOT_READY, &mddev->flags)) { |
9e653b63 N |
4395 | switch(mddev->ro) { |
4396 | case 1: | |
4397 | st = readonly; | |
4398 | break; | |
4399 | case 2: | |
4400 | st = read_auto; | |
4401 | break; | |
4402 | case 0: | |
55cc39f3 | 4403 | spin_lock(&mddev->lock); |
2953079c | 4404 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
e691063a | 4405 | st = write_pending; |
16f88949 TM |
4406 | else if (mddev->in_sync) |
4407 | st = clean; | |
9e653b63 N |
4408 | else if (mddev->safemode) |
4409 | st = active_idle; | |
4410 | else | |
4411 | st = active; | |
55cc39f3 | 4412 | spin_unlock(&mddev->lock); |
9e653b63 | 4413 | } |
62f7b198 GP |
4414 | |
4415 | if (test_bit(MD_BROKEN, &mddev->flags) && st == clean) | |
4416 | st = broken; | |
4417 | } else { | |
9e653b63 N |
4418 | if (list_empty(&mddev->disks) && |
4419 | mddev->raid_disks == 0 && | |
58c0fed4 | 4420 | mddev->dev_sectors == 0) |
9e653b63 N |
4421 | st = clear; |
4422 | else | |
4423 | st = inactive; | |
4424 | } | |
4425 | return sprintf(page, "%s\n", array_states[st]); | |
4426 | } | |
4427 | ||
f72ffdd6 N |
4428 | static int do_md_stop(struct mddev *mddev, int ro, struct block_device *bdev); |
4429 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev); | |
fd01b88c | 4430 | static int restart_array(struct mddev *mddev); |
9e653b63 N |
4431 | |
4432 | static ssize_t | |
fd01b88c | 4433 | array_state_store(struct mddev *mddev, const char *buf, size_t len) |
9e653b63 | 4434 | { |
6497709b | 4435 | int err = 0; |
9e653b63 | 4436 | enum array_state st = match_word(buf, array_states); |
6791875e N |
4437 | |
4438 | if (mddev->pers && (st == active || st == clean) && mddev->ro != 1) { | |
4439 | /* don't take reconfig_mutex when toggling between | |
4440 | * clean and active | |
4441 | */ | |
4442 | spin_lock(&mddev->lock); | |
4443 | if (st == active) { | |
4444 | restart_array(mddev); | |
2953079c | 4445 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
91a6c4ad | 4446 | md_wakeup_thread(mddev->thread); |
6791875e | 4447 | wake_up(&mddev->sb_wait); |
6791875e N |
4448 | } else /* st == clean */ { |
4449 | restart_array(mddev); | |
6497709b | 4450 | if (!set_in_sync(mddev)) |
6791875e N |
4451 | err = -EBUSY; |
4452 | } | |
573275b5 TM |
4453 | if (!err) |
4454 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
6791875e | 4455 | spin_unlock(&mddev->lock); |
c008f1d3 | 4456 | return err ?: len; |
6791875e N |
4457 | } |
4458 | err = mddev_lock(mddev); | |
4459 | if (err) | |
4460 | return err; | |
4461 | err = -EINVAL; | |
9e653b63 N |
4462 | switch(st) { |
4463 | case bad_word: | |
4464 | break; | |
4465 | case clear: | |
4466 | /* stopping an active array */ | |
a05b7ea0 | 4467 | err = do_md_stop(mddev, 0, NULL); |
9e653b63 N |
4468 | break; |
4469 | case inactive: | |
4470 | /* stopping an active array */ | |
90cf195d | 4471 | if (mddev->pers) |
a05b7ea0 | 4472 | err = do_md_stop(mddev, 2, NULL); |
90cf195d | 4473 | else |
e691063a | 4474 | err = 0; /* already inactive */ |
9e653b63 N |
4475 | break; |
4476 | case suspended: | |
4477 | break; /* not supported yet */ | |
4478 | case readonly: | |
4479 | if (mddev->pers) | |
a05b7ea0 | 4480 | err = md_set_readonly(mddev, NULL); |
9e653b63 N |
4481 | else { |
4482 | mddev->ro = 1; | |
648b629e | 4483 | set_disk_ro(mddev->gendisk, 1); |
9e653b63 N |
4484 | err = do_md_run(mddev); |
4485 | } | |
4486 | break; | |
4487 | case read_auto: | |
9e653b63 | 4488 | if (mddev->pers) { |
80268ee9 | 4489 | if (mddev->ro == 0) |
a05b7ea0 | 4490 | err = md_set_readonly(mddev, NULL); |
80268ee9 | 4491 | else if (mddev->ro == 1) |
648b629e N |
4492 | err = restart_array(mddev); |
4493 | if (err == 0) { | |
4494 | mddev->ro = 2; | |
4495 | set_disk_ro(mddev->gendisk, 0); | |
4496 | } | |
9e653b63 N |
4497 | } else { |
4498 | mddev->ro = 2; | |
4499 | err = do_md_run(mddev); | |
4500 | } | |
4501 | break; | |
4502 | case clean: | |
4503 | if (mddev->pers) { | |
339421de SL |
4504 | err = restart_array(mddev); |
4505 | if (err) | |
4506 | break; | |
85572d7c | 4507 | spin_lock(&mddev->lock); |
6497709b | 4508 | if (!set_in_sync(mddev)) |
e691063a | 4509 | err = -EBUSY; |
85572d7c | 4510 | spin_unlock(&mddev->lock); |
5bf29597 N |
4511 | } else |
4512 | err = -EINVAL; | |
9e653b63 N |
4513 | break; |
4514 | case active: | |
4515 | if (mddev->pers) { | |
339421de SL |
4516 | err = restart_array(mddev); |
4517 | if (err) | |
4518 | break; | |
2953079c | 4519 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
9e653b63 N |
4520 | wake_up(&mddev->sb_wait); |
4521 | err = 0; | |
4522 | } else { | |
4523 | mddev->ro = 0; | |
648b629e | 4524 | set_disk_ro(mddev->gendisk, 0); |
9e653b63 N |
4525 | err = do_md_run(mddev); |
4526 | } | |
4527 | break; | |
4528 | case write_pending: | |
4529 | case active_idle: | |
62f7b198 | 4530 | case broken: |
9e653b63 N |
4531 | /* these cannot be set */ |
4532 | break; | |
4533 | } | |
6791875e N |
4534 | |
4535 | if (!err) { | |
1d23f178 N |
4536 | if (mddev->hold_active == UNTIL_IOCTL) |
4537 | mddev->hold_active = 0; | |
00bcb4ac | 4538 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 4539 | } |
6791875e N |
4540 | mddev_unlock(mddev); |
4541 | return err ?: len; | |
9e653b63 | 4542 | } |
80ca3a44 | 4543 | static struct md_sysfs_entry md_array_state = |
750f199e | 4544 | __ATTR_PREALLOC(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store); |
9e653b63 | 4545 | |
1e50915f | 4546 | static ssize_t |
fd01b88c | 4547 | max_corrected_read_errors_show(struct mddev *mddev, char *page) { |
1e50915f RB |
4548 | return sprintf(page, "%d\n", |
4549 | atomic_read(&mddev->max_corr_read_errors)); | |
4550 | } | |
4551 | ||
4552 | static ssize_t | |
fd01b88c | 4553 | max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len) |
1e50915f | 4554 | { |
4c9309c0 AD |
4555 | unsigned int n; |
4556 | int rv; | |
1e50915f | 4557 | |
4c9309c0 AD |
4558 | rv = kstrtouint(buf, 10, &n); |
4559 | if (rv < 0) | |
4560 | return rv; | |
4561 | atomic_set(&mddev->max_corr_read_errors, n); | |
4562 | return len; | |
1e50915f RB |
4563 | } |
4564 | ||
4565 | static struct md_sysfs_entry max_corr_read_errors = | |
4566 | __ATTR(max_read_errors, S_IRUGO|S_IWUSR, max_corrected_read_errors_show, | |
4567 | max_corrected_read_errors_store); | |
4568 | ||
6d7ff738 | 4569 | static ssize_t |
fd01b88c | 4570 | null_show(struct mddev *mddev, char *page) |
6d7ff738 N |
4571 | { |
4572 | return -EINVAL; | |
4573 | } | |
4574 | ||
cc1ffe61 GJ |
4575 | /* need to ensure rdev_delayed_delete() has completed */ |
4576 | static void flush_rdev_wq(struct mddev *mddev) | |
4577 | { | |
4578 | struct md_rdev *rdev; | |
4579 | ||
4580 | rcu_read_lock(); | |
4581 | rdev_for_each_rcu(rdev, mddev) | |
4582 | if (work_pending(&rdev->del_work)) { | |
4583 | flush_workqueue(md_rdev_misc_wq); | |
4584 | break; | |
4585 | } | |
4586 | rcu_read_unlock(); | |
4587 | } | |
4588 | ||
6d7ff738 | 4589 | static ssize_t |
fd01b88c | 4590 | new_dev_store(struct mddev *mddev, const char *buf, size_t len) |
6d7ff738 N |
4591 | { |
4592 | /* buf must be %d:%d\n? giving major and minor numbers */ | |
4593 | /* The new device is added to the array. | |
4594 | * If the array has a persistent superblock, we read the | |
4595 | * superblock to initialise info and check validity. | |
4596 | * Otherwise, only checking done is that in bind_rdev_to_array, | |
4597 | * which mainly checks size. | |
4598 | */ | |
4599 | char *e; | |
4600 | int major = simple_strtoul(buf, &e, 10); | |
4601 | int minor; | |
4602 | dev_t dev; | |
3cb03002 | 4603 | struct md_rdev *rdev; |
6d7ff738 N |
4604 | int err; |
4605 | ||
4606 | if (!*buf || *e != ':' || !e[1] || e[1] == '\n') | |
4607 | return -EINVAL; | |
4608 | minor = simple_strtoul(e+1, &e, 10); | |
4609 | if (*e && *e != '\n') | |
4610 | return -EINVAL; | |
4611 | dev = MKDEV(major, minor); | |
4612 | if (major != MAJOR(dev) || | |
4613 | minor != MINOR(dev)) | |
4614 | return -EOVERFLOW; | |
4615 | ||
cc1ffe61 | 4616 | flush_rdev_wq(mddev); |
6791875e N |
4617 | err = mddev_lock(mddev); |
4618 | if (err) | |
4619 | return err; | |
6d7ff738 N |
4620 | if (mddev->persistent) { |
4621 | rdev = md_import_device(dev, mddev->major_version, | |
4622 | mddev->minor_version); | |
4623 | if (!IS_ERR(rdev) && !list_empty(&mddev->disks)) { | |
3cb03002 N |
4624 | struct md_rdev *rdev0 |
4625 | = list_entry(mddev->disks.next, | |
4626 | struct md_rdev, same_set); | |
6d7ff738 N |
4627 | err = super_types[mddev->major_version] |
4628 | .load_super(rdev, rdev0, mddev->minor_version); | |
4629 | if (err < 0) | |
4630 | goto out; | |
4631 | } | |
c5d79adb N |
4632 | } else if (mddev->external) |
4633 | rdev = md_import_device(dev, -2, -1); | |
4634 | else | |
6d7ff738 N |
4635 | rdev = md_import_device(dev, -1, -1); |
4636 | ||
9a8c0fa8 N |
4637 | if (IS_ERR(rdev)) { |
4638 | mddev_unlock(mddev); | |
6d7ff738 | 4639 | return PTR_ERR(rdev); |
9a8c0fa8 | 4640 | } |
6d7ff738 N |
4641 | err = bind_rdev_to_array(rdev, mddev); |
4642 | out: | |
4643 | if (err) | |
4644 | export_rdev(rdev); | |
6791875e | 4645 | mddev_unlock(mddev); |
5492c46e AO |
4646 | if (!err) |
4647 | md_new_event(mddev); | |
6d7ff738 N |
4648 | return err ? err : len; |
4649 | } | |
4650 | ||
4651 | static struct md_sysfs_entry md_new_device = | |
80ca3a44 | 4652 | __ATTR(new_dev, S_IWUSR, null_show, new_dev_store); |
3b34380a | 4653 | |
9b1d1dac | 4654 | static ssize_t |
fd01b88c | 4655 | bitmap_store(struct mddev *mddev, const char *buf, size_t len) |
9b1d1dac PC |
4656 | { |
4657 | char *end; | |
4658 | unsigned long chunk, end_chunk; | |
6791875e | 4659 | int err; |
9b1d1dac | 4660 | |
6791875e N |
4661 | err = mddev_lock(mddev); |
4662 | if (err) | |
4663 | return err; | |
9b1d1dac PC |
4664 | if (!mddev->bitmap) |
4665 | goto out; | |
4666 | /* buf should be <chunk> <chunk> ... or <chunk>-<chunk> ... (range) */ | |
4667 | while (*buf) { | |
4668 | chunk = end_chunk = simple_strtoul(buf, &end, 0); | |
4669 | if (buf == end) break; | |
4670 | if (*end == '-') { /* range */ | |
4671 | buf = end + 1; | |
4672 | end_chunk = simple_strtoul(buf, &end, 0); | |
4673 | if (buf == end) break; | |
4674 | } | |
4675 | if (*end && !isspace(*end)) break; | |
e64e4018 | 4676 | md_bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk); |
e7d2860b | 4677 | buf = skip_spaces(end); |
9b1d1dac | 4678 | } |
e64e4018 | 4679 | md_bitmap_unplug(mddev->bitmap); /* flush the bits to disk */ |
9b1d1dac | 4680 | out: |
6791875e | 4681 | mddev_unlock(mddev); |
9b1d1dac PC |
4682 | return len; |
4683 | } | |
4684 | ||
4685 | static struct md_sysfs_entry md_bitmap = | |
4686 | __ATTR(bitmap_set_bits, S_IWUSR, null_show, bitmap_store); | |
4687 | ||
a35b0d69 | 4688 | static ssize_t |
fd01b88c | 4689 | size_show(struct mddev *mddev, char *page) |
a35b0d69 | 4690 | { |
58c0fed4 AN |
4691 | return sprintf(page, "%llu\n", |
4692 | (unsigned long long)mddev->dev_sectors / 2); | |
a35b0d69 N |
4693 | } |
4694 | ||
fd01b88c | 4695 | static int update_size(struct mddev *mddev, sector_t num_sectors); |
a35b0d69 N |
4696 | |
4697 | static ssize_t | |
fd01b88c | 4698 | size_store(struct mddev *mddev, const char *buf, size_t len) |
a35b0d69 N |
4699 | { |
4700 | /* If array is inactive, we can reduce the component size, but | |
4701 | * not increase it (except from 0). | |
4702 | * If array is active, we can try an on-line resize | |
4703 | */ | |
b522adcd DW |
4704 | sector_t sectors; |
4705 | int err = strict_blocks_to_sectors(buf, §ors); | |
a35b0d69 | 4706 | |
58c0fed4 AN |
4707 | if (err < 0) |
4708 | return err; | |
6791875e N |
4709 | err = mddev_lock(mddev); |
4710 | if (err) | |
4711 | return err; | |
a35b0d69 | 4712 | if (mddev->pers) { |
58c0fed4 | 4713 | err = update_size(mddev, sectors); |
4ba1e788 XN |
4714 | if (err == 0) |
4715 | md_update_sb(mddev, 1); | |
a35b0d69 | 4716 | } else { |
58c0fed4 AN |
4717 | if (mddev->dev_sectors == 0 || |
4718 | mddev->dev_sectors > sectors) | |
4719 | mddev->dev_sectors = sectors; | |
a35b0d69 N |
4720 | else |
4721 | err = -ENOSPC; | |
4722 | } | |
6791875e | 4723 | mddev_unlock(mddev); |
a35b0d69 N |
4724 | return err ? err : len; |
4725 | } | |
4726 | ||
4727 | static struct md_sysfs_entry md_size = | |
80ca3a44 | 4728 | __ATTR(component_size, S_IRUGO|S_IWUSR, size_show, size_store); |
a35b0d69 | 4729 | |
83f0d77a | 4730 | /* Metadata version. |
e691063a N |
4731 | * This is one of |
4732 | * 'none' for arrays with no metadata (good luck...) | |
4733 | * 'external' for arrays with externally managed metadata, | |
8bb93aac N |
4734 | * or N.M for internally known formats |
4735 | */ | |
4736 | static ssize_t | |
fd01b88c | 4737 | metadata_show(struct mddev *mddev, char *page) |
8bb93aac N |
4738 | { |
4739 | if (mddev->persistent) | |
4740 | return sprintf(page, "%d.%d\n", | |
4741 | mddev->major_version, mddev->minor_version); | |
e691063a N |
4742 | else if (mddev->external) |
4743 | return sprintf(page, "external:%s\n", mddev->metadata_type); | |
8bb93aac N |
4744 | else |
4745 | return sprintf(page, "none\n"); | |
4746 | } | |
4747 | ||
4748 | static ssize_t | |
fd01b88c | 4749 | metadata_store(struct mddev *mddev, const char *buf, size_t len) |
8bb93aac N |
4750 | { |
4751 | int major, minor; | |
4752 | char *e; | |
6791875e | 4753 | int err; |
ea43ddd8 N |
4754 | /* Changing the details of 'external' metadata is |
4755 | * always permitted. Otherwise there must be | |
4756 | * no devices attached to the array. | |
4757 | */ | |
6791875e N |
4758 | |
4759 | err = mddev_lock(mddev); | |
4760 | if (err) | |
4761 | return err; | |
4762 | err = -EBUSY; | |
ea43ddd8 N |
4763 | if (mddev->external && strncmp(buf, "external:", 9) == 0) |
4764 | ; | |
4765 | else if (!list_empty(&mddev->disks)) | |
6791875e | 4766 | goto out_unlock; |
8bb93aac | 4767 | |
6791875e | 4768 | err = 0; |
8bb93aac N |
4769 | if (cmd_match(buf, "none")) { |
4770 | mddev->persistent = 0; | |
e691063a N |
4771 | mddev->external = 0; |
4772 | mddev->major_version = 0; | |
4773 | mddev->minor_version = 90; | |
6791875e | 4774 | goto out_unlock; |
e691063a N |
4775 | } |
4776 | if (strncmp(buf, "external:", 9) == 0) { | |
20a49ff6 | 4777 | size_t namelen = len-9; |
e691063a N |
4778 | if (namelen >= sizeof(mddev->metadata_type)) |
4779 | namelen = sizeof(mddev->metadata_type)-1; | |
4780 | strncpy(mddev->metadata_type, buf+9, namelen); | |
4781 | mddev->metadata_type[namelen] = 0; | |
4782 | if (namelen && mddev->metadata_type[namelen-1] == '\n') | |
4783 | mddev->metadata_type[--namelen] = 0; | |
4784 | mddev->persistent = 0; | |
4785 | mddev->external = 1; | |
8bb93aac N |
4786 | mddev->major_version = 0; |
4787 | mddev->minor_version = 90; | |
6791875e | 4788 | goto out_unlock; |
8bb93aac N |
4789 | } |
4790 | major = simple_strtoul(buf, &e, 10); | |
6791875e | 4791 | err = -EINVAL; |
8bb93aac | 4792 | if (e==buf || *e != '.') |
6791875e | 4793 | goto out_unlock; |
8bb93aac N |
4794 | buf = e+1; |
4795 | minor = simple_strtoul(buf, &e, 10); | |
3f9d7b0d | 4796 | if (e==buf || (*e && *e != '\n') ) |
6791875e N |
4797 | goto out_unlock; |
4798 | err = -ENOENT; | |
50511da3 | 4799 | if (major >= ARRAY_SIZE(super_types) || super_types[major].name == NULL) |
6791875e | 4800 | goto out_unlock; |
8bb93aac N |
4801 | mddev->major_version = major; |
4802 | mddev->minor_version = minor; | |
4803 | mddev->persistent = 1; | |
e691063a | 4804 | mddev->external = 0; |
6791875e N |
4805 | err = 0; |
4806 | out_unlock: | |
4807 | mddev_unlock(mddev); | |
4808 | return err ?: len; | |
8bb93aac N |
4809 | } |
4810 | ||
4811 | static struct md_sysfs_entry md_metadata = | |
750f199e | 4812 | __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store); |
8bb93aac | 4813 | |
24dd469d | 4814 | static ssize_t |
fd01b88c | 4815 | action_show(struct mddev *mddev, char *page) |
24dd469d | 4816 | { |
7eec314d | 4817 | char *type = "idle"; |
b7b17c9b N |
4818 | unsigned long recovery = mddev->recovery; |
4819 | if (test_bit(MD_RECOVERY_FROZEN, &recovery)) | |
b6a9ce68 | 4820 | type = "frozen"; |
b7b17c9b N |
4821 | else if (test_bit(MD_RECOVERY_RUNNING, &recovery) || |
4822 | (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &recovery))) { | |
4823 | if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) | |
ccfcc3c1 | 4824 | type = "reshape"; |
b7b17c9b N |
4825 | else if (test_bit(MD_RECOVERY_SYNC, &recovery)) { |
4826 | if (!test_bit(MD_RECOVERY_REQUESTED, &recovery)) | |
24dd469d | 4827 | type = "resync"; |
b7b17c9b | 4828 | else if (test_bit(MD_RECOVERY_CHECK, &recovery)) |
24dd469d N |
4829 | type = "check"; |
4830 | else | |
4831 | type = "repair"; | |
b7b17c9b | 4832 | } else if (test_bit(MD_RECOVERY_RECOVER, &recovery)) |
24dd469d | 4833 | type = "recover"; |
985ca973 N |
4834 | else if (mddev->reshape_position != MaxSector) |
4835 | type = "reshape"; | |
24dd469d N |
4836 | } |
4837 | return sprintf(page, "%s\n", type); | |
4838 | } | |
4839 | ||
4840 | static ssize_t | |
fd01b88c | 4841 | action_store(struct mddev *mddev, const char *page, size_t len) |
24dd469d | 4842 | { |
7eec314d N |
4843 | if (!mddev->pers || !mddev->pers->sync_request) |
4844 | return -EINVAL; | |
4845 | ||
b6a9ce68 N |
4846 | |
4847 | if (cmd_match(page, "idle") || cmd_match(page, "frozen")) { | |
56ccc112 N |
4848 | if (cmd_match(page, "frozen")) |
4849 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4850 | else | |
4851 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
8e8e2518 N |
4852 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
4853 | mddev_lock(mddev) == 0) { | |
cc1ffe61 GJ |
4854 | if (work_pending(&mddev->del_work)) |
4855 | flush_workqueue(md_misc_wq); | |
8e8e2518 N |
4856 | if (mddev->sync_thread) { |
4857 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
6791875e | 4858 | md_reap_sync_thread(mddev); |
6791875e | 4859 | } |
8e8e2518 | 4860 | mddev_unlock(mddev); |
7eec314d | 4861 | } |
312045ee | 4862 | } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
24dd469d | 4863 | return -EBUSY; |
72a23c21 | 4864 | else if (cmd_match(page, "resync")) |
56ccc112 | 4865 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4866 | else if (cmd_match(page, "recover")) { |
56ccc112 | 4867 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4868 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
72a23c21 | 4869 | } else if (cmd_match(page, "reshape")) { |
16484bf5 N |
4870 | int err; |
4871 | if (mddev->pers->start_reshape == NULL) | |
4872 | return -EINVAL; | |
6791875e N |
4873 | err = mddev_lock(mddev); |
4874 | if (!err) { | |
312045ee N |
4875 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4876 | err = -EBUSY; | |
4877 | else { | |
4878 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4879 | err = mddev->pers->start_reshape(mddev); | |
4880 | } | |
6791875e N |
4881 | mddev_unlock(mddev); |
4882 | } | |
16484bf5 N |
4883 | if (err) |
4884 | return err; | |
e1a86dbb | 4885 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
16484bf5 | 4886 | } else { |
bce74dac | 4887 | if (cmd_match(page, "check")) |
7eec314d | 4888 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
2adc7d47 | 4889 | else if (!cmd_match(page, "repair")) |
7eec314d | 4890 | return -EINVAL; |
56ccc112 | 4891 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
7eec314d N |
4892 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
4893 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
7eec314d | 4894 | } |
48c26ddc N |
4895 | if (mddev->ro == 2) { |
4896 | /* A write to sync_action is enough to justify | |
4897 | * canceling read-auto mode | |
4898 | */ | |
4899 | mddev->ro = 0; | |
4900 | md_wakeup_thread(mddev->sync_thread); | |
4901 | } | |
03c902e1 | 4902 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
24dd469d | 4903 | md_wakeup_thread(mddev->thread); |
00bcb4ac | 4904 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
24dd469d N |
4905 | return len; |
4906 | } | |
4907 | ||
c4a39551 | 4908 | static struct md_sysfs_entry md_scan_mode = |
750f199e | 4909 | __ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store); |
c4a39551 JB |
4910 | |
4911 | static ssize_t | |
4912 | last_sync_action_show(struct mddev *mddev, char *page) | |
4913 | { | |
4914 | return sprintf(page, "%s\n", mddev->last_sync_action); | |
4915 | } | |
4916 | ||
4917 | static struct md_sysfs_entry md_last_scan_mode = __ATTR_RO(last_sync_action); | |
4918 | ||
9d88883e | 4919 | static ssize_t |
fd01b88c | 4920 | mismatch_cnt_show(struct mddev *mddev, char *page) |
9d88883e N |
4921 | { |
4922 | return sprintf(page, "%llu\n", | |
7f7583d4 JM |
4923 | (unsigned long long) |
4924 | atomic64_read(&mddev->resync_mismatches)); | |
9d88883e N |
4925 | } |
4926 | ||
80ca3a44 | 4927 | static struct md_sysfs_entry md_mismatches = __ATTR_RO(mismatch_cnt); |
9d88883e | 4928 | |
88202a0c | 4929 | static ssize_t |
fd01b88c | 4930 | sync_min_show(struct mddev *mddev, char *page) |
88202a0c N |
4931 | { |
4932 | return sprintf(page, "%d (%s)\n", speed_min(mddev), | |
4933 | mddev->sync_speed_min ? "local": "system"); | |
4934 | } | |
4935 | ||
4936 | static ssize_t | |
fd01b88c | 4937 | sync_min_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4938 | { |
4c9309c0 AD |
4939 | unsigned int min; |
4940 | int rv; | |
4941 | ||
88202a0c | 4942 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4943 | min = 0; |
4944 | } else { | |
4945 | rv = kstrtouint(buf, 10, &min); | |
4946 | if (rv < 0) | |
4947 | return rv; | |
4948 | if (min == 0) | |
4949 | return -EINVAL; | |
88202a0c | 4950 | } |
88202a0c N |
4951 | mddev->sync_speed_min = min; |
4952 | return len; | |
4953 | } | |
4954 | ||
4955 | static struct md_sysfs_entry md_sync_min = | |
4956 | __ATTR(sync_speed_min, S_IRUGO|S_IWUSR, sync_min_show, sync_min_store); | |
4957 | ||
4958 | static ssize_t | |
fd01b88c | 4959 | sync_max_show(struct mddev *mddev, char *page) |
88202a0c N |
4960 | { |
4961 | return sprintf(page, "%d (%s)\n", speed_max(mddev), | |
4962 | mddev->sync_speed_max ? "local": "system"); | |
4963 | } | |
4964 | ||
4965 | static ssize_t | |
fd01b88c | 4966 | sync_max_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4967 | { |
4c9309c0 AD |
4968 | unsigned int max; |
4969 | int rv; | |
4970 | ||
88202a0c | 4971 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4972 | max = 0; |
4973 | } else { | |
4974 | rv = kstrtouint(buf, 10, &max); | |
4975 | if (rv < 0) | |
4976 | return rv; | |
4977 | if (max == 0) | |
4978 | return -EINVAL; | |
88202a0c | 4979 | } |
88202a0c N |
4980 | mddev->sync_speed_max = max; |
4981 | return len; | |
4982 | } | |
4983 | ||
4984 | static struct md_sysfs_entry md_sync_max = | |
4985 | __ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store); | |
4986 | ||
d7f3d291 | 4987 | static ssize_t |
fd01b88c | 4988 | degraded_show(struct mddev *mddev, char *page) |
d7f3d291 IP |
4989 | { |
4990 | return sprintf(page, "%d\n", mddev->degraded); | |
4991 | } | |
4992 | static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded); | |
88202a0c | 4993 | |
90b08710 | 4994 | static ssize_t |
fd01b88c | 4995 | sync_force_parallel_show(struct mddev *mddev, char *page) |
90b08710 BS |
4996 | { |
4997 | return sprintf(page, "%d\n", mddev->parallel_resync); | |
4998 | } | |
4999 | ||
5000 | static ssize_t | |
fd01b88c | 5001 | sync_force_parallel_store(struct mddev *mddev, const char *buf, size_t len) |
90b08710 BS |
5002 | { |
5003 | long n; | |
5004 | ||
b29bebd6 | 5005 | if (kstrtol(buf, 10, &n)) |
90b08710 BS |
5006 | return -EINVAL; |
5007 | ||
5008 | if (n != 0 && n != 1) | |
5009 | return -EINVAL; | |
5010 | ||
5011 | mddev->parallel_resync = n; | |
5012 | ||
5013 | if (mddev->sync_thread) | |
5014 | wake_up(&resync_wait); | |
5015 | ||
5016 | return len; | |
5017 | } | |
5018 | ||
5019 | /* force parallel resync, even with shared block devices */ | |
5020 | static struct md_sysfs_entry md_sync_force_parallel = | |
5021 | __ATTR(sync_force_parallel, S_IRUGO|S_IWUSR, | |
5022 | sync_force_parallel_show, sync_force_parallel_store); | |
5023 | ||
88202a0c | 5024 | static ssize_t |
fd01b88c | 5025 | sync_speed_show(struct mddev *mddev, char *page) |
88202a0c N |
5026 | { |
5027 | unsigned long resync, dt, db; | |
d1a7c503 N |
5028 | if (mddev->curr_resync == 0) |
5029 | return sprintf(page, "none\n"); | |
9687a60c AN |
5030 | resync = mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active); |
5031 | dt = (jiffies - mddev->resync_mark) / HZ; | |
88202a0c | 5032 | if (!dt) dt++; |
9687a60c AN |
5033 | db = resync - mddev->resync_mark_cnt; |
5034 | return sprintf(page, "%lu\n", db/dt/2); /* K/sec */ | |
88202a0c N |
5035 | } |
5036 | ||
80ca3a44 | 5037 | static struct md_sysfs_entry md_sync_speed = __ATTR_RO(sync_speed); |
88202a0c N |
5038 | |
5039 | static ssize_t | |
fd01b88c | 5040 | sync_completed_show(struct mddev *mddev, char *page) |
88202a0c | 5041 | { |
13ae864b | 5042 | unsigned long long max_sectors, resync; |
88202a0c | 5043 | |
acb180b0 N |
5044 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
5045 | return sprintf(page, "none\n"); | |
5046 | ||
72f36d59 N |
5047 | if (mddev->curr_resync == 1 || |
5048 | mddev->curr_resync == 2) | |
5049 | return sprintf(page, "delayed\n"); | |
5050 | ||
c804cdec N |
5051 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
5052 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
58c0fed4 | 5053 | max_sectors = mddev->resync_max_sectors; |
88202a0c | 5054 | else |
58c0fed4 | 5055 | max_sectors = mddev->dev_sectors; |
88202a0c | 5056 | |
acb180b0 | 5057 | resync = mddev->curr_resync_completed; |
13ae864b | 5058 | return sprintf(page, "%llu / %llu\n", resync, max_sectors); |
88202a0c N |
5059 | } |
5060 | ||
750f199e N |
5061 | static struct md_sysfs_entry md_sync_completed = |
5062 | __ATTR_PREALLOC(sync_completed, S_IRUGO, sync_completed_show, NULL); | |
88202a0c | 5063 | |
5e96ee65 | 5064 | static ssize_t |
fd01b88c | 5065 | min_sync_show(struct mddev *mddev, char *page) |
5e96ee65 NB |
5066 | { |
5067 | return sprintf(page, "%llu\n", | |
5068 | (unsigned long long)mddev->resync_min); | |
5069 | } | |
5070 | static ssize_t | |
fd01b88c | 5071 | min_sync_store(struct mddev *mddev, const char *buf, size_t len) |
5e96ee65 NB |
5072 | { |
5073 | unsigned long long min; | |
23da422b | 5074 | int err; |
23da422b | 5075 | |
b29bebd6 | 5076 | if (kstrtoull(buf, 10, &min)) |
5e96ee65 | 5077 | return -EINVAL; |
23da422b N |
5078 | |
5079 | spin_lock(&mddev->lock); | |
5080 | err = -EINVAL; | |
5e96ee65 | 5081 | if (min > mddev->resync_max) |
23da422b N |
5082 | goto out_unlock; |
5083 | ||
5084 | err = -EBUSY; | |
5e96ee65 | 5085 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 5086 | goto out_unlock; |
5e96ee65 | 5087 | |
50c37b13 N |
5088 | /* Round down to multiple of 4K for safety */ |
5089 | mddev->resync_min = round_down(min, 8); | |
23da422b | 5090 | err = 0; |
5e96ee65 | 5091 | |
23da422b N |
5092 | out_unlock: |
5093 | spin_unlock(&mddev->lock); | |
5094 | return err ?: len; | |
5e96ee65 NB |
5095 | } |
5096 | ||
5097 | static struct md_sysfs_entry md_min_sync = | |
5098 | __ATTR(sync_min, S_IRUGO|S_IWUSR, min_sync_show, min_sync_store); | |
5099 | ||
c6207277 | 5100 | static ssize_t |
fd01b88c | 5101 | max_sync_show(struct mddev *mddev, char *page) |
c6207277 N |
5102 | { |
5103 | if (mddev->resync_max == MaxSector) | |
5104 | return sprintf(page, "max\n"); | |
5105 | else | |
5106 | return sprintf(page, "%llu\n", | |
5107 | (unsigned long long)mddev->resync_max); | |
5108 | } | |
5109 | static ssize_t | |
fd01b88c | 5110 | max_sync_store(struct mddev *mddev, const char *buf, size_t len) |
c6207277 | 5111 | { |
23da422b N |
5112 | int err; |
5113 | spin_lock(&mddev->lock); | |
c6207277 N |
5114 | if (strncmp(buf, "max", 3) == 0) |
5115 | mddev->resync_max = MaxSector; | |
5116 | else { | |
5e96ee65 | 5117 | unsigned long long max; |
23da422b N |
5118 | int chunk; |
5119 | ||
5120 | err = -EINVAL; | |
b29bebd6 | 5121 | if (kstrtoull(buf, 10, &max)) |
23da422b | 5122 | goto out_unlock; |
5e96ee65 | 5123 | if (max < mddev->resync_min) |
23da422b N |
5124 | goto out_unlock; |
5125 | ||
5126 | err = -EBUSY; | |
c6207277 | 5127 | if (max < mddev->resync_max && |
4d484a4a | 5128 | mddev->ro == 0 && |
c6207277 | 5129 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 5130 | goto out_unlock; |
c6207277 N |
5131 | |
5132 | /* Must be a multiple of chunk_size */ | |
23da422b N |
5133 | chunk = mddev->chunk_sectors; |
5134 | if (chunk) { | |
2ac06c33 | 5135 | sector_t temp = max; |
23da422b N |
5136 | |
5137 | err = -EINVAL; | |
5138 | if (sector_div(temp, chunk)) | |
5139 | goto out_unlock; | |
c6207277 N |
5140 | } |
5141 | mddev->resync_max = max; | |
5142 | } | |
5143 | wake_up(&mddev->recovery_wait); | |
23da422b N |
5144 | err = 0; |
5145 | out_unlock: | |
5146 | spin_unlock(&mddev->lock); | |
5147 | return err ?: len; | |
c6207277 N |
5148 | } |
5149 | ||
5150 | static struct md_sysfs_entry md_max_sync = | |
5151 | __ATTR(sync_max, S_IRUGO|S_IWUSR, max_sync_show, max_sync_store); | |
5152 | ||
e464eafd | 5153 | static ssize_t |
fd01b88c | 5154 | suspend_lo_show(struct mddev *mddev, char *page) |
e464eafd N |
5155 | { |
5156 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_lo); | |
5157 | } | |
5158 | ||
5159 | static ssize_t | |
fd01b88c | 5160 | suspend_lo_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5161 | { |
b03e0ccb | 5162 | unsigned long long new; |
6791875e | 5163 | int err; |
e464eafd | 5164 | |
4c9309c0 AD |
5165 | err = kstrtoull(buf, 10, &new); |
5166 | if (err < 0) | |
5167 | return err; | |
5168 | if (new != (sector_t)new) | |
e464eafd | 5169 | return -EINVAL; |
23ddff37 | 5170 | |
6791875e N |
5171 | err = mddev_lock(mddev); |
5172 | if (err) | |
5173 | return err; | |
5174 | err = -EINVAL; | |
5175 | if (mddev->pers == NULL || | |
5176 | mddev->pers->quiesce == NULL) | |
5177 | goto unlock; | |
b03e0ccb | 5178 | mddev_suspend(mddev); |
23ddff37 | 5179 | mddev->suspend_lo = new; |
b03e0ccb N |
5180 | mddev_resume(mddev); |
5181 | ||
6791875e N |
5182 | err = 0; |
5183 | unlock: | |
5184 | mddev_unlock(mddev); | |
5185 | return err ?: len; | |
e464eafd N |
5186 | } |
5187 | static struct md_sysfs_entry md_suspend_lo = | |
5188 | __ATTR(suspend_lo, S_IRUGO|S_IWUSR, suspend_lo_show, suspend_lo_store); | |
5189 | ||
e464eafd | 5190 | static ssize_t |
fd01b88c | 5191 | suspend_hi_show(struct mddev *mddev, char *page) |
e464eafd N |
5192 | { |
5193 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_hi); | |
5194 | } | |
5195 | ||
5196 | static ssize_t | |
fd01b88c | 5197 | suspend_hi_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5198 | { |
b03e0ccb | 5199 | unsigned long long new; |
6791875e | 5200 | int err; |
e464eafd | 5201 | |
4c9309c0 AD |
5202 | err = kstrtoull(buf, 10, &new); |
5203 | if (err < 0) | |
5204 | return err; | |
5205 | if (new != (sector_t)new) | |
e464eafd | 5206 | return -EINVAL; |
23ddff37 | 5207 | |
6791875e N |
5208 | err = mddev_lock(mddev); |
5209 | if (err) | |
5210 | return err; | |
5211 | err = -EINVAL; | |
b03e0ccb | 5212 | if (mddev->pers == NULL) |
6791875e | 5213 | goto unlock; |
b03e0ccb N |
5214 | |
5215 | mddev_suspend(mddev); | |
23ddff37 | 5216 | mddev->suspend_hi = new; |
b03e0ccb N |
5217 | mddev_resume(mddev); |
5218 | ||
6791875e N |
5219 | err = 0; |
5220 | unlock: | |
5221 | mddev_unlock(mddev); | |
5222 | return err ?: len; | |
e464eafd N |
5223 | } |
5224 | static struct md_sysfs_entry md_suspend_hi = | |
5225 | __ATTR(suspend_hi, S_IRUGO|S_IWUSR, suspend_hi_show, suspend_hi_store); | |
5226 | ||
08a02ecd | 5227 | static ssize_t |
fd01b88c | 5228 | reshape_position_show(struct mddev *mddev, char *page) |
08a02ecd N |
5229 | { |
5230 | if (mddev->reshape_position != MaxSector) | |
5231 | return sprintf(page, "%llu\n", | |
5232 | (unsigned long long)mddev->reshape_position); | |
5233 | strcpy(page, "none\n"); | |
5234 | return 5; | |
5235 | } | |
5236 | ||
5237 | static ssize_t | |
fd01b88c | 5238 | reshape_position_store(struct mddev *mddev, const char *buf, size_t len) |
08a02ecd | 5239 | { |
c6563a8c | 5240 | struct md_rdev *rdev; |
4c9309c0 | 5241 | unsigned long long new; |
6791875e | 5242 | int err; |
6791875e | 5243 | |
4c9309c0 AD |
5244 | err = kstrtoull(buf, 10, &new); |
5245 | if (err < 0) | |
5246 | return err; | |
5247 | if (new != (sector_t)new) | |
08a02ecd | 5248 | return -EINVAL; |
6791875e N |
5249 | err = mddev_lock(mddev); |
5250 | if (err) | |
5251 | return err; | |
5252 | err = -EBUSY; | |
5253 | if (mddev->pers) | |
5254 | goto unlock; | |
08a02ecd N |
5255 | mddev->reshape_position = new; |
5256 | mddev->delta_disks = 0; | |
2c810cdd | 5257 | mddev->reshape_backwards = 0; |
08a02ecd N |
5258 | mddev->new_level = mddev->level; |
5259 | mddev->new_layout = mddev->layout; | |
664e7c41 | 5260 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
c6563a8c N |
5261 | rdev_for_each(rdev, mddev) |
5262 | rdev->new_data_offset = rdev->data_offset; | |
6791875e N |
5263 | err = 0; |
5264 | unlock: | |
5265 | mddev_unlock(mddev); | |
5266 | return err ?: len; | |
08a02ecd N |
5267 | } |
5268 | ||
5269 | static struct md_sysfs_entry md_reshape_position = | |
5270 | __ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show, | |
5271 | reshape_position_store); | |
5272 | ||
2c810cdd N |
5273 | static ssize_t |
5274 | reshape_direction_show(struct mddev *mddev, char *page) | |
5275 | { | |
5276 | return sprintf(page, "%s\n", | |
5277 | mddev->reshape_backwards ? "backwards" : "forwards"); | |
5278 | } | |
5279 | ||
5280 | static ssize_t | |
5281 | reshape_direction_store(struct mddev *mddev, const char *buf, size_t len) | |
5282 | { | |
5283 | int backwards = 0; | |
6791875e N |
5284 | int err; |
5285 | ||
2c810cdd N |
5286 | if (cmd_match(buf, "forwards")) |
5287 | backwards = 0; | |
5288 | else if (cmd_match(buf, "backwards")) | |
5289 | backwards = 1; | |
5290 | else | |
5291 | return -EINVAL; | |
5292 | if (mddev->reshape_backwards == backwards) | |
5293 | return len; | |
5294 | ||
6791875e N |
5295 | err = mddev_lock(mddev); |
5296 | if (err) | |
5297 | return err; | |
2c810cdd N |
5298 | /* check if we are allowed to change */ |
5299 | if (mddev->delta_disks) | |
6791875e N |
5300 | err = -EBUSY; |
5301 | else if (mddev->persistent && | |
2c810cdd | 5302 | mddev->major_version == 0) |
6791875e N |
5303 | err = -EINVAL; |
5304 | else | |
5305 | mddev->reshape_backwards = backwards; | |
5306 | mddev_unlock(mddev); | |
5307 | return err ?: len; | |
2c810cdd N |
5308 | } |
5309 | ||
5310 | static struct md_sysfs_entry md_reshape_direction = | |
5311 | __ATTR(reshape_direction, S_IRUGO|S_IWUSR, reshape_direction_show, | |
5312 | reshape_direction_store); | |
5313 | ||
b522adcd | 5314 | static ssize_t |
fd01b88c | 5315 | array_size_show(struct mddev *mddev, char *page) |
b522adcd DW |
5316 | { |
5317 | if (mddev->external_size) | |
5318 | return sprintf(page, "%llu\n", | |
5319 | (unsigned long long)mddev->array_sectors/2); | |
5320 | else | |
5321 | return sprintf(page, "default\n"); | |
5322 | } | |
5323 | ||
5324 | static ssize_t | |
fd01b88c | 5325 | array_size_store(struct mddev *mddev, const char *buf, size_t len) |
b522adcd DW |
5326 | { |
5327 | sector_t sectors; | |
6791875e N |
5328 | int err; |
5329 | ||
5330 | err = mddev_lock(mddev); | |
5331 | if (err) | |
5332 | return err; | |
b522adcd | 5333 | |
ab5a98b1 | 5334 | /* cluster raid doesn't support change array_sectors */ |
b670883b ZL |
5335 | if (mddev_is_clustered(mddev)) { |
5336 | mddev_unlock(mddev); | |
ab5a98b1 | 5337 | return -EINVAL; |
b670883b | 5338 | } |
ab5a98b1 | 5339 | |
b522adcd DW |
5340 | if (strncmp(buf, "default", 7) == 0) { |
5341 | if (mddev->pers) | |
5342 | sectors = mddev->pers->size(mddev, 0, 0); | |
5343 | else | |
5344 | sectors = mddev->array_sectors; | |
5345 | ||
5346 | mddev->external_size = 0; | |
5347 | } else { | |
5348 | if (strict_blocks_to_sectors(buf, §ors) < 0) | |
6791875e N |
5349 | err = -EINVAL; |
5350 | else if (mddev->pers && mddev->pers->size(mddev, 0, 0) < sectors) | |
5351 | err = -E2BIG; | |
5352 | else | |
5353 | mddev->external_size = 1; | |
b522adcd DW |
5354 | } |
5355 | ||
6791875e N |
5356 | if (!err) { |
5357 | mddev->array_sectors = sectors; | |
5358 | if (mddev->pers) { | |
5359 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
659e56ba | 5360 | revalidate_disk_size(mddev->gendisk, true); |
6791875e | 5361 | } |
cbe6ef1d | 5362 | } |
6791875e N |
5363 | mddev_unlock(mddev); |
5364 | return err ?: len; | |
b522adcd DW |
5365 | } |
5366 | ||
5367 | static struct md_sysfs_entry md_array_size = | |
5368 | __ATTR(array_size, S_IRUGO|S_IWUSR, array_size_show, | |
5369 | array_size_store); | |
e464eafd | 5370 | |
664aed04 AP |
5371 | static ssize_t |
5372 | consistency_policy_show(struct mddev *mddev, char *page) | |
5373 | { | |
5374 | int ret; | |
5375 | ||
5376 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) { | |
5377 | ret = sprintf(page, "journal\n"); | |
5378 | } else if (test_bit(MD_HAS_PPL, &mddev->flags)) { | |
5379 | ret = sprintf(page, "ppl\n"); | |
5380 | } else if (mddev->bitmap) { | |
5381 | ret = sprintf(page, "bitmap\n"); | |
5382 | } else if (mddev->pers) { | |
5383 | if (mddev->pers->sync_request) | |
5384 | ret = sprintf(page, "resync\n"); | |
5385 | else | |
5386 | ret = sprintf(page, "none\n"); | |
5387 | } else { | |
5388 | ret = sprintf(page, "unknown\n"); | |
5389 | } | |
5390 | ||
5391 | return ret; | |
5392 | } | |
5393 | ||
5394 | static ssize_t | |
5395 | consistency_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5396 | { | |
ba903a3e AP |
5397 | int err = 0; |
5398 | ||
664aed04 | 5399 | if (mddev->pers) { |
ba903a3e AP |
5400 | if (mddev->pers->change_consistency_policy) |
5401 | err = mddev->pers->change_consistency_policy(mddev, buf); | |
5402 | else | |
5403 | err = -EBUSY; | |
664aed04 AP |
5404 | } else if (mddev->external && strncmp(buf, "ppl", 3) == 0) { |
5405 | set_bit(MD_HAS_PPL, &mddev->flags); | |
664aed04 | 5406 | } else { |
ba903a3e | 5407 | err = -EINVAL; |
664aed04 | 5408 | } |
ba903a3e AP |
5409 | |
5410 | return err ? err : len; | |
664aed04 AP |
5411 | } |
5412 | ||
5413 | static struct md_sysfs_entry md_consistency_policy = | |
5414 | __ATTR(consistency_policy, S_IRUGO | S_IWUSR, consistency_policy_show, | |
5415 | consistency_policy_store); | |
5416 | ||
9a567843 GJ |
5417 | static ssize_t fail_last_dev_show(struct mddev *mddev, char *page) |
5418 | { | |
5419 | return sprintf(page, "%d\n", mddev->fail_last_dev); | |
5420 | } | |
5421 | ||
5422 | /* | |
5423 | * Setting fail_last_dev to true to allow last device to be forcibly removed | |
5424 | * from RAID1/RAID10. | |
5425 | */ | |
5426 | static ssize_t | |
5427 | fail_last_dev_store(struct mddev *mddev, const char *buf, size_t len) | |
5428 | { | |
5429 | int ret; | |
5430 | bool value; | |
5431 | ||
5432 | ret = kstrtobool(buf, &value); | |
5433 | if (ret) | |
5434 | return ret; | |
5435 | ||
5436 | if (value != mddev->fail_last_dev) | |
5437 | mddev->fail_last_dev = value; | |
5438 | ||
5439 | return len; | |
5440 | } | |
5441 | static struct md_sysfs_entry md_fail_last_dev = | |
5442 | __ATTR(fail_last_dev, S_IRUGO | S_IWUSR, fail_last_dev_show, | |
5443 | fail_last_dev_store); | |
5444 | ||
3938f5fb GJ |
5445 | static ssize_t serialize_policy_show(struct mddev *mddev, char *page) |
5446 | { | |
5447 | if (mddev->pers == NULL || (mddev->pers->level != 1)) | |
5448 | return sprintf(page, "n/a\n"); | |
5449 | else | |
5450 | return sprintf(page, "%d\n", mddev->serialize_policy); | |
5451 | } | |
5452 | ||
5453 | /* | |
5454 | * Setting serialize_policy to true to enforce write IO is not reordered | |
5455 | * for raid1. | |
5456 | */ | |
5457 | static ssize_t | |
5458 | serialize_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5459 | { | |
5460 | int err; | |
5461 | bool value; | |
5462 | ||
5463 | err = kstrtobool(buf, &value); | |
5464 | if (err) | |
5465 | return err; | |
5466 | ||
5467 | if (value == mddev->serialize_policy) | |
5468 | return len; | |
5469 | ||
5470 | err = mddev_lock(mddev); | |
5471 | if (err) | |
5472 | return err; | |
5473 | if (mddev->pers == NULL || (mddev->pers->level != 1)) { | |
5474 | pr_err("md: serialize_policy is only effective for raid1\n"); | |
5475 | err = -EINVAL; | |
5476 | goto unlock; | |
5477 | } | |
5478 | ||
5479 | mddev_suspend(mddev); | |
5480 | if (value) | |
5481 | mddev_create_serial_pool(mddev, NULL, true); | |
5482 | else | |
5483 | mddev_destroy_serial_pool(mddev, NULL, true); | |
5484 | mddev->serialize_policy = value; | |
5485 | mddev_resume(mddev); | |
5486 | unlock: | |
5487 | mddev_unlock(mddev); | |
5488 | return err ?: len; | |
5489 | } | |
5490 | ||
5491 | static struct md_sysfs_entry md_serialize_policy = | |
5492 | __ATTR(serialize_policy, S_IRUGO | S_IWUSR, serialize_policy_show, | |
5493 | serialize_policy_store); | |
5494 | ||
5495 | ||
eae1701f N |
5496 | static struct attribute *md_default_attrs[] = { |
5497 | &md_level.attr, | |
d4dbd025 | 5498 | &md_layout.attr, |
eae1701f | 5499 | &md_raid_disks.attr, |
ec164d07 | 5500 | &md_uuid.attr, |
3b34380a | 5501 | &md_chunk_size.attr, |
a35b0d69 | 5502 | &md_size.attr, |
a94213b1 | 5503 | &md_resync_start.attr, |
8bb93aac | 5504 | &md_metadata.attr, |
6d7ff738 | 5505 | &md_new_device.attr, |
16f17b39 | 5506 | &md_safe_delay.attr, |
9e653b63 | 5507 | &md_array_state.attr, |
08a02ecd | 5508 | &md_reshape_position.attr, |
2c810cdd | 5509 | &md_reshape_direction.attr, |
b522adcd | 5510 | &md_array_size.attr, |
1e50915f | 5511 | &max_corr_read_errors.attr, |
664aed04 | 5512 | &md_consistency_policy.attr, |
9a567843 | 5513 | &md_fail_last_dev.attr, |
3938f5fb | 5514 | &md_serialize_policy.attr, |
411036fa N |
5515 | NULL, |
5516 | }; | |
5517 | ||
5518 | static struct attribute *md_redundancy_attrs[] = { | |
24dd469d | 5519 | &md_scan_mode.attr, |
c4a39551 | 5520 | &md_last_scan_mode.attr, |
9d88883e | 5521 | &md_mismatches.attr, |
88202a0c N |
5522 | &md_sync_min.attr, |
5523 | &md_sync_max.attr, | |
5524 | &md_sync_speed.attr, | |
90b08710 | 5525 | &md_sync_force_parallel.attr, |
88202a0c | 5526 | &md_sync_completed.attr, |
5e96ee65 | 5527 | &md_min_sync.attr, |
c6207277 | 5528 | &md_max_sync.attr, |
e464eafd N |
5529 | &md_suspend_lo.attr, |
5530 | &md_suspend_hi.attr, | |
9b1d1dac | 5531 | &md_bitmap.attr, |
d7f3d291 | 5532 | &md_degraded.attr, |
eae1701f N |
5533 | NULL, |
5534 | }; | |
411036fa N |
5535 | static struct attribute_group md_redundancy_group = { |
5536 | .name = NULL, | |
5537 | .attrs = md_redundancy_attrs, | |
5538 | }; | |
5539 | ||
eae1701f N |
5540 | static ssize_t |
5541 | md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
5542 | { | |
5543 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5544 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5545 | ssize_t rv; |
eae1701f N |
5546 | |
5547 | if (!entry->show) | |
5548 | return -EIO; | |
af8a2434 N |
5549 | spin_lock(&all_mddevs_lock); |
5550 | if (list_empty(&mddev->all_mddevs)) { | |
5551 | spin_unlock(&all_mddevs_lock); | |
5552 | return -EBUSY; | |
5553 | } | |
5554 | mddev_get(mddev); | |
5555 | spin_unlock(&all_mddevs_lock); | |
5556 | ||
b7b17c9b | 5557 | rv = entry->show(mddev, page); |
af8a2434 | 5558 | mddev_put(mddev); |
96de1e66 | 5559 | return rv; |
eae1701f N |
5560 | } |
5561 | ||
5562 | static ssize_t | |
5563 | md_attr_store(struct kobject *kobj, struct attribute *attr, | |
5564 | const char *page, size_t length) | |
5565 | { | |
5566 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5567 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5568 | ssize_t rv; |
eae1701f N |
5569 | |
5570 | if (!entry->store) | |
5571 | return -EIO; | |
67463acb N |
5572 | if (!capable(CAP_SYS_ADMIN)) |
5573 | return -EACCES; | |
af8a2434 N |
5574 | spin_lock(&all_mddevs_lock); |
5575 | if (list_empty(&mddev->all_mddevs)) { | |
5576 | spin_unlock(&all_mddevs_lock); | |
5577 | return -EBUSY; | |
5578 | } | |
5579 | mddev_get(mddev); | |
5580 | spin_unlock(&all_mddevs_lock); | |
6791875e | 5581 | rv = entry->store(mddev, page, length); |
af8a2434 | 5582 | mddev_put(mddev); |
96de1e66 | 5583 | return rv; |
eae1701f N |
5584 | } |
5585 | ||
5586 | static void md_free(struct kobject *ko) | |
5587 | { | |
fd01b88c | 5588 | struct mddev *mddev = container_of(ko, struct mddev, kobj); |
a21d1504 N |
5589 | |
5590 | if (mddev->sysfs_state) | |
5591 | sysfs_put(mddev->sysfs_state); | |
e1a86dbb JB |
5592 | if (mddev->sysfs_level) |
5593 | sysfs_put(mddev->sysfs_level); | |
5594 | ||
d8115c35 BVA |
5595 | if (mddev->gendisk) |
5596 | del_gendisk(mddev->gendisk); | |
6cd18e71 N |
5597 | if (mddev->queue) |
5598 | blk_cleanup_queue(mddev->queue); | |
d8115c35 | 5599 | if (mddev->gendisk) |
a21d1504 | 5600 | put_disk(mddev->gendisk); |
4ad23a97 | 5601 | percpu_ref_exit(&mddev->writes_pending); |
a21d1504 | 5602 | |
28dec870 KO |
5603 | bioset_exit(&mddev->bio_set); |
5604 | bioset_exit(&mddev->sync_set); | |
41d2d848 | 5605 | mempool_exit(&mddev->md_io_pool); |
eae1701f N |
5606 | kfree(mddev); |
5607 | } | |
5608 | ||
52cf25d0 | 5609 | static const struct sysfs_ops md_sysfs_ops = { |
eae1701f N |
5610 | .show = md_attr_show, |
5611 | .store = md_attr_store, | |
5612 | }; | |
5613 | static struct kobj_type md_ktype = { | |
5614 | .release = md_free, | |
5615 | .sysfs_ops = &md_sysfs_ops, | |
5616 | .default_attrs = md_default_attrs, | |
5617 | }; | |
5618 | ||
1da177e4 LT |
5619 | int mdp_major = 0; |
5620 | ||
5fd3a17e DW |
5621 | static void mddev_delayed_delete(struct work_struct *ws) |
5622 | { | |
fd01b88c | 5623 | struct mddev *mddev = container_of(ws, struct mddev, del_work); |
5fd3a17e | 5624 | |
43a70507 | 5625 | sysfs_remove_group(&mddev->kobj, &md_bitmap_group); |
5fd3a17e DW |
5626 | kobject_del(&mddev->kobj); |
5627 | kobject_put(&mddev->kobj); | |
5628 | } | |
5629 | ||
4ad23a97 N |
5630 | static void no_op(struct percpu_ref *r) {} |
5631 | ||
a415c0f1 N |
5632 | int mddev_init_writes_pending(struct mddev *mddev) |
5633 | { | |
5634 | if (mddev->writes_pending.percpu_count_ptr) | |
5635 | return 0; | |
ddde2af7 RG |
5636 | if (percpu_ref_init(&mddev->writes_pending, no_op, |
5637 | PERCPU_REF_ALLOW_REINIT, GFP_KERNEL) < 0) | |
a415c0f1 N |
5638 | return -ENOMEM; |
5639 | /* We want to start with the refcount at zero */ | |
5640 | percpu_ref_put(&mddev->writes_pending); | |
5641 | return 0; | |
5642 | } | |
5643 | EXPORT_SYMBOL_GPL(mddev_init_writes_pending); | |
5644 | ||
efeb53c0 | 5645 | static int md_alloc(dev_t dev, char *name) |
1da177e4 | 5646 | { |
039b7225 N |
5647 | /* |
5648 | * If dev is zero, name is the name of a device to allocate with | |
5649 | * an arbitrary minor number. It will be "md_???" | |
5650 | * If dev is non-zero it must be a device number with a MAJOR of | |
5651 | * MD_MAJOR or mdp_major. In this case, if "name" is NULL, then | |
5652 | * the device is being created by opening a node in /dev. | |
5653 | * If "name" is not NULL, the device is being created by | |
5654 | * writing to /sys/module/md_mod/parameters/new_array. | |
5655 | */ | |
48c9c27b | 5656 | static DEFINE_MUTEX(disks_mutex); |
fd01b88c | 5657 | struct mddev *mddev = mddev_find(dev); |
1da177e4 | 5658 | struct gendisk *disk; |
efeb53c0 N |
5659 | int partitioned; |
5660 | int shift; | |
5661 | int unit; | |
3830c62f | 5662 | int error; |
1da177e4 LT |
5663 | |
5664 | if (!mddev) | |
efeb53c0 N |
5665 | return -ENODEV; |
5666 | ||
5667 | partitioned = (MAJOR(mddev->unit) != MD_MAJOR); | |
5668 | shift = partitioned ? MdpMinorShift : 0; | |
5669 | unit = MINOR(mddev->unit) >> shift; | |
1da177e4 | 5670 | |
e804ac78 TH |
5671 | /* wait for any previous instance of this device to be |
5672 | * completely removed (mddev_delayed_delete). | |
d3374825 | 5673 | */ |
e804ac78 | 5674 | flush_workqueue(md_misc_wq); |
d3374825 | 5675 | |
48c9c27b | 5676 | mutex_lock(&disks_mutex); |
0909dc44 N |
5677 | error = -EEXIST; |
5678 | if (mddev->gendisk) | |
5679 | goto abort; | |
efeb53c0 | 5680 | |
039b7225 | 5681 | if (name && !dev) { |
efeb53c0 N |
5682 | /* Need to ensure that 'name' is not a duplicate. |
5683 | */ | |
fd01b88c | 5684 | struct mddev *mddev2; |
efeb53c0 N |
5685 | spin_lock(&all_mddevs_lock); |
5686 | ||
5687 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) | |
5688 | if (mddev2->gendisk && | |
5689 | strcmp(mddev2->gendisk->disk_name, name) == 0) { | |
5690 | spin_unlock(&all_mddevs_lock); | |
0909dc44 | 5691 | goto abort; |
efeb53c0 N |
5692 | } |
5693 | spin_unlock(&all_mddevs_lock); | |
1da177e4 | 5694 | } |
039b7225 N |
5695 | if (name && dev) |
5696 | /* | |
5697 | * Creating /dev/mdNNN via "newarray", so adjust hold_active. | |
5698 | */ | |
5699 | mddev->hold_active = UNTIL_STOP; | |
8b765398 | 5700 | |
41d2d848 AP |
5701 | error = mempool_init_kmalloc_pool(&mddev->md_io_pool, BIO_POOL_SIZE, |
5702 | sizeof(struct md_io)); | |
5703 | if (error) | |
5704 | goto abort; | |
5705 | ||
0909dc44 | 5706 | error = -ENOMEM; |
c62b37d9 | 5707 | mddev->queue = blk_alloc_queue(NUMA_NO_NODE); |
0909dc44 N |
5708 | if (!mddev->queue) |
5709 | goto abort; | |
409c57f3 | 5710 | |
b1bd055d | 5711 | blk_set_stacking_limits(&mddev->queue->limits); |
8b765398 | 5712 | |
1da177e4 LT |
5713 | disk = alloc_disk(1 << shift); |
5714 | if (!disk) { | |
8b765398 N |
5715 | blk_cleanup_queue(mddev->queue); |
5716 | mddev->queue = NULL; | |
0909dc44 | 5717 | goto abort; |
1da177e4 | 5718 | } |
efeb53c0 | 5719 | disk->major = MAJOR(mddev->unit); |
1da177e4 | 5720 | disk->first_minor = unit << shift; |
efeb53c0 N |
5721 | if (name) |
5722 | strcpy(disk->disk_name, name); | |
5723 | else if (partitioned) | |
1da177e4 | 5724 | sprintf(disk->disk_name, "md_d%d", unit); |
ce7b0f46 | 5725 | else |
1da177e4 | 5726 | sprintf(disk->disk_name, "md%d", unit); |
1da177e4 LT |
5727 | disk->fops = &md_fops; |
5728 | disk->private_data = mddev; | |
5729 | disk->queue = mddev->queue; | |
56883a7e | 5730 | blk_queue_write_cache(mddev->queue, true, true); |
92850bbd | 5731 | /* Allow extended partitions. This makes the |
d3374825 | 5732 | * 'mdp' device redundant, but we can't really |
92850bbd N |
5733 | * remove it now. |
5734 | */ | |
5735 | disk->flags |= GENHD_FL_EXT_DEVT; | |
a564e23f | 5736 | disk->events |= DISK_EVENT_MEDIA_CHANGE; |
1da177e4 | 5737 | mddev->gendisk = disk; |
b0140891 N |
5738 | /* As soon as we call add_disk(), another thread could get |
5739 | * through to md_open, so make sure it doesn't get too far | |
5740 | */ | |
5741 | mutex_lock(&mddev->open_mutex); | |
5742 | add_disk(disk); | |
5743 | ||
28dec870 | 5744 | error = kobject_add(&mddev->kobj, &disk_to_dev(disk)->kobj, "%s", "md"); |
0909dc44 N |
5745 | if (error) { |
5746 | /* This isn't possible, but as kobject_init_and_add is marked | |
5747 | * __must_check, we must do something with the result | |
5748 | */ | |
9d48739e N |
5749 | pr_debug("md: cannot register %s/md - name in use\n", |
5750 | disk->disk_name); | |
0909dc44 N |
5751 | error = 0; |
5752 | } | |
00bcb4ac N |
5753 | if (mddev->kobj.sd && |
5754 | sysfs_create_group(&mddev->kobj, &md_bitmap_group)) | |
9d48739e | 5755 | pr_debug("pointless warning\n"); |
b0140891 | 5756 | mutex_unlock(&mddev->open_mutex); |
0909dc44 N |
5757 | abort: |
5758 | mutex_unlock(&disks_mutex); | |
00bcb4ac | 5759 | if (!error && mddev->kobj.sd) { |
3830c62f | 5760 | kobject_uevent(&mddev->kobj, KOBJ_ADD); |
00bcb4ac | 5761 | mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state"); |
e1a86dbb | 5762 | mddev->sysfs_level = sysfs_get_dirent_safe(mddev->kobj.sd, "level"); |
b62b7590 | 5763 | } |
d3374825 | 5764 | mddev_put(mddev); |
0909dc44 | 5765 | return error; |
efeb53c0 N |
5766 | } |
5767 | ||
28144f99 | 5768 | static void md_probe(dev_t dev) |
efeb53c0 | 5769 | { |
28144f99 CH |
5770 | if (MAJOR(dev) == MD_MAJOR && MINOR(dev) >= 512) |
5771 | return; | |
78b6350d N |
5772 | if (create_on_open) |
5773 | md_alloc(dev, NULL); | |
1da177e4 LT |
5774 | } |
5775 | ||
e4dca7b7 | 5776 | static int add_named_array(const char *val, const struct kernel_param *kp) |
efeb53c0 | 5777 | { |
039b7225 N |
5778 | /* |
5779 | * val must be "md_*" or "mdNNN". | |
5780 | * For "md_*" we allocate an array with a large free minor number, and | |
efeb53c0 | 5781 | * set the name to val. val must not already be an active name. |
039b7225 N |
5782 | * For "mdNNN" we allocate an array with the minor number NNN |
5783 | * which must not already be in use. | |
efeb53c0 N |
5784 | */ |
5785 | int len = strlen(val); | |
5786 | char buf[DISK_NAME_LEN]; | |
039b7225 | 5787 | unsigned long devnum; |
efeb53c0 N |
5788 | |
5789 | while (len && val[len-1] == '\n') | |
5790 | len--; | |
5791 | if (len >= DISK_NAME_LEN) | |
5792 | return -E2BIG; | |
5793 | strlcpy(buf, val, len+1); | |
039b7225 N |
5794 | if (strncmp(buf, "md_", 3) == 0) |
5795 | return md_alloc(0, buf); | |
5796 | if (strncmp(buf, "md", 2) == 0 && | |
5797 | isdigit(buf[2]) && | |
5798 | kstrtoul(buf+2, 10, &devnum) == 0 && | |
5799 | devnum <= MINORMASK) | |
5800 | return md_alloc(MKDEV(MD_MAJOR, devnum), NULL); | |
5801 | ||
5802 | return -EINVAL; | |
efeb53c0 N |
5803 | } |
5804 | ||
8376d3c1 | 5805 | static void md_safemode_timeout(struct timer_list *t) |
1da177e4 | 5806 | { |
8376d3c1 | 5807 | struct mddev *mddev = from_timer(mddev, t, safemode_timer); |
1da177e4 | 5808 | |
4ad23a97 N |
5809 | mddev->safemode = 1; |
5810 | if (mddev->external) | |
5811 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
5812 | ||
1da177e4 LT |
5813 | md_wakeup_thread(mddev->thread); |
5814 | } | |
5815 | ||
6ff8d8ec | 5816 | static int start_dirty_degraded; |
1da177e4 | 5817 | |
fd01b88c | 5818 | int md_run(struct mddev *mddev) |
1da177e4 | 5819 | { |
2604b703 | 5820 | int err; |
3cb03002 | 5821 | struct md_rdev *rdev; |
84fc4b56 | 5822 | struct md_personality *pers; |
1da177e4 | 5823 | |
a757e64c N |
5824 | if (list_empty(&mddev->disks)) |
5825 | /* cannot run an array with no devices.. */ | |
1da177e4 | 5826 | return -EINVAL; |
1da177e4 LT |
5827 | |
5828 | if (mddev->pers) | |
5829 | return -EBUSY; | |
bb4f1e9d N |
5830 | /* Cannot run until previous stop completes properly */ |
5831 | if (mddev->sysfs_active) | |
5832 | return -EBUSY; | |
b6eb127d | 5833 | |
1da177e4 LT |
5834 | /* |
5835 | * Analyze all RAID superblock(s) | |
5836 | */ | |
1ec4a939 N |
5837 | if (!mddev->raid_disks) { |
5838 | if (!mddev->persistent) | |
5839 | return -EINVAL; | |
6a5cb53a YY |
5840 | err = analyze_sbs(mddev); |
5841 | if (err) | |
5842 | return -EINVAL; | |
1ec4a939 | 5843 | } |
1da177e4 | 5844 | |
d9d166c2 N |
5845 | if (mddev->level != LEVEL_NONE) |
5846 | request_module("md-level-%d", mddev->level); | |
5847 | else if (mddev->clevel[0]) | |
5848 | request_module("md-%s", mddev->clevel); | |
1da177e4 LT |
5849 | |
5850 | /* | |
5851 | * Drop all container device buffers, from now on | |
5852 | * the only valid external interface is through the md | |
5853 | * device. | |
1da177e4 | 5854 | */ |
4b6c1060 | 5855 | mddev->has_superblocks = false; |
dafb20fa | 5856 | rdev_for_each(rdev, mddev) { |
b2d444d7 | 5857 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
5858 | continue; |
5859 | sync_blockdev(rdev->bdev); | |
f98393a6 | 5860 | invalidate_bdev(rdev->bdev); |
97b20ef7 N |
5861 | if (mddev->ro != 1 && |
5862 | (bdev_read_only(rdev->bdev) || | |
5863 | bdev_read_only(rdev->meta_bdev))) { | |
5864 | mddev->ro = 1; | |
5865 | if (mddev->gendisk) | |
5866 | set_disk_ro(mddev->gendisk, 1); | |
5867 | } | |
f0d76d70 | 5868 | |
4b6c1060 HM |
5869 | if (rdev->sb_page) |
5870 | mddev->has_superblocks = true; | |
5871 | ||
f0d76d70 N |
5872 | /* perform some consistency tests on the device. |
5873 | * We don't want the data to overlap the metadata, | |
58c0fed4 | 5874 | * Internal Bitmap issues have been handled elsewhere. |
f0d76d70 | 5875 | */ |
a6ff7e08 JB |
5876 | if (rdev->meta_bdev) { |
5877 | /* Nothing to check */; | |
5878 | } else if (rdev->data_offset < rdev->sb_start) { | |
58c0fed4 AN |
5879 | if (mddev->dev_sectors && |
5880 | rdev->data_offset + mddev->dev_sectors | |
0f420358 | 5881 | > rdev->sb_start) { |
9d48739e N |
5882 | pr_warn("md: %s: data overlaps metadata\n", |
5883 | mdname(mddev)); | |
f0d76d70 N |
5884 | return -EINVAL; |
5885 | } | |
5886 | } else { | |
0f420358 | 5887 | if (rdev->sb_start + rdev->sb_size/512 |
f0d76d70 | 5888 | > rdev->data_offset) { |
9d48739e N |
5889 | pr_warn("md: %s: metadata overlaps data\n", |
5890 | mdname(mddev)); | |
f0d76d70 N |
5891 | return -EINVAL; |
5892 | } | |
5893 | } | |
00bcb4ac | 5894 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
5895 | } |
5896 | ||
afeee514 KO |
5897 | if (!bioset_initialized(&mddev->bio_set)) { |
5898 | err = bioset_init(&mddev->bio_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5899 | if (err) | |
5900 | return err; | |
10273170 | 5901 | } |
afeee514 KO |
5902 | if (!bioset_initialized(&mddev->sync_set)) { |
5903 | err = bioset_init(&mddev->sync_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5904 | if (err) | |
28dec870 | 5905 | return err; |
5a85071c | 5906 | } |
a167f663 | 5907 | |
1da177e4 | 5908 | spin_lock(&pers_lock); |
d9d166c2 | 5909 | pers = find_pers(mddev->level, mddev->clevel); |
2604b703 | 5910 | if (!pers || !try_module_get(pers->owner)) { |
1da177e4 | 5911 | spin_unlock(&pers_lock); |
d9d166c2 | 5912 | if (mddev->level != LEVEL_NONE) |
9d48739e N |
5913 | pr_warn("md: personality for level %d is not loaded!\n", |
5914 | mddev->level); | |
d9d166c2 | 5915 | else |
9d48739e N |
5916 | pr_warn("md: personality for level %s is not loaded!\n", |
5917 | mddev->clevel); | |
bfc9dfdc SL |
5918 | err = -EINVAL; |
5919 | goto abort; | |
1da177e4 | 5920 | } |
1da177e4 | 5921 | spin_unlock(&pers_lock); |
34817e8c N |
5922 | if (mddev->level != pers->level) { |
5923 | mddev->level = pers->level; | |
5924 | mddev->new_level = pers->level; | |
5925 | } | |
d9d166c2 | 5926 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
1da177e4 | 5927 | |
f6705578 | 5928 | if (mddev->reshape_position != MaxSector && |
63c70c4f | 5929 | pers->start_reshape == NULL) { |
f6705578 | 5930 | /* This personality cannot handle reshaping... */ |
f6705578 | 5931 | module_put(pers->owner); |
bfc9dfdc SL |
5932 | err = -EINVAL; |
5933 | goto abort; | |
f6705578 N |
5934 | } |
5935 | ||
7dd5e7c3 N |
5936 | if (pers->sync_request) { |
5937 | /* Warn if this is a potentially silly | |
5938 | * configuration. | |
5939 | */ | |
5940 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 5941 | struct md_rdev *rdev2; |
7dd5e7c3 | 5942 | int warned = 0; |
159ec1fc | 5943 | |
dafb20fa N |
5944 | rdev_for_each(rdev, mddev) |
5945 | rdev_for_each(rdev2, mddev) { | |
7dd5e7c3 | 5946 | if (rdev < rdev2 && |
61a27e1f CH |
5947 | rdev->bdev->bd_disk == |
5948 | rdev2->bdev->bd_disk) { | |
9d48739e N |
5949 | pr_warn("%s: WARNING: %s appears to be on the same physical disk as %s.\n", |
5950 | mdname(mddev), | |
5951 | bdevname(rdev->bdev,b), | |
5952 | bdevname(rdev2->bdev,b2)); | |
7dd5e7c3 N |
5953 | warned = 1; |
5954 | } | |
5955 | } | |
159ec1fc | 5956 | |
7dd5e7c3 | 5957 | if (warned) |
9d48739e | 5958 | pr_warn("True protection against single-disk failure might be compromised.\n"); |
7dd5e7c3 N |
5959 | } |
5960 | ||
657390d2 | 5961 | mddev->recovery = 0; |
58c0fed4 AN |
5962 | /* may be over-ridden by personality */ |
5963 | mddev->resync_max_sectors = mddev->dev_sectors; | |
5964 | ||
6ff8d8ec | 5965 | mddev->ok_start_degraded = start_dirty_degraded; |
1da177e4 | 5966 | |
0f9552b5 | 5967 | if (start_readonly && mddev->ro == 0) |
f91de92e N |
5968 | mddev->ro = 2; /* read-only, but switch on first write */ |
5969 | ||
36d091f4 | 5970 | err = pers->run(mddev); |
13e53df3 | 5971 | if (err) |
9d48739e | 5972 | pr_warn("md: pers->run() failed ...\n"); |
36d091f4 | 5973 | else if (pers->size(mddev, 0, 0) < mddev->array_sectors) { |
9d48739e N |
5974 | WARN_ONCE(!mddev->external_size, |
5975 | "%s: default size too small, but 'external_size' not in effect?\n", | |
5976 | __func__); | |
5977 | pr_warn("md: invalid array_size %llu > default size %llu\n", | |
5978 | (unsigned long long)mddev->array_sectors / 2, | |
5979 | (unsigned long long)pers->size(mddev, 0, 0) / 2); | |
b522adcd | 5980 | err = -EINVAL; |
b522adcd | 5981 | } |
36d091f4 | 5982 | if (err == 0 && pers->sync_request && |
ef99bf48 | 5983 | (mddev->bitmap_info.file || mddev->bitmap_info.offset)) { |
f9209a32 GR |
5984 | struct bitmap *bitmap; |
5985 | ||
e64e4018 | 5986 | bitmap = md_bitmap_create(mddev, -1); |
f9209a32 GR |
5987 | if (IS_ERR(bitmap)) { |
5988 | err = PTR_ERR(bitmap); | |
9d48739e N |
5989 | pr_warn("%s: failed to create bitmap (%d)\n", |
5990 | mdname(mddev), err); | |
f9209a32 GR |
5991 | } else |
5992 | mddev->bitmap = bitmap; | |
5993 | ||
b15c2e57 | 5994 | } |
d494549a GJ |
5995 | if (err) |
5996 | goto bitmap_abort; | |
3e148a32 GJ |
5997 | |
5998 | if (mddev->bitmap_info.max_write_behind > 0) { | |
3e173ab5 | 5999 | bool create_pool = false; |
3e148a32 GJ |
6000 | |
6001 | rdev_for_each(rdev, mddev) { | |
6002 | if (test_bit(WriteMostly, &rdev->flags) && | |
404659cf | 6003 | rdev_init_serial(rdev)) |
3e173ab5 | 6004 | create_pool = true; |
3e148a32 | 6005 | } |
3e173ab5 | 6006 | if (create_pool && mddev->serial_info_pool == NULL) { |
404659cf GJ |
6007 | mddev->serial_info_pool = |
6008 | mempool_create_kmalloc_pool(NR_SERIAL_INFOS, | |
6009 | sizeof(struct serial_info)); | |
6010 | if (!mddev->serial_info_pool) { | |
3e148a32 | 6011 | err = -ENOMEM; |
d494549a | 6012 | goto bitmap_abort; |
3e148a32 GJ |
6013 | } |
6014 | } | |
6015 | } | |
6016 | ||
5c675f83 | 6017 | if (mddev->queue) { |
bb086a89 SL |
6018 | bool nonrot = true; |
6019 | ||
6020 | rdev_for_each(rdev, mddev) { | |
6021 | if (rdev->raid_disk >= 0 && | |
6022 | !blk_queue_nonrot(bdev_get_queue(rdev->bdev))) { | |
6023 | nonrot = false; | |
6024 | break; | |
6025 | } | |
6026 | } | |
6027 | if (mddev->degraded) | |
6028 | nonrot = false; | |
6029 | if (nonrot) | |
8b904b5b | 6030 | blk_queue_flag_set(QUEUE_FLAG_NONROT, mddev->queue); |
bb086a89 | 6031 | else |
8b904b5b | 6032 | blk_queue_flag_clear(QUEUE_FLAG_NONROT, mddev->queue); |
5c675f83 | 6033 | } |
36d091f4 | 6034 | if (pers->sync_request) { |
00bcb4ac N |
6035 | if (mddev->kobj.sd && |
6036 | sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
6037 | pr_warn("md: cannot register extra attributes for %s\n", |
6038 | mdname(mddev)); | |
00bcb4ac | 6039 | mddev->sysfs_action = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_action"); |
e8efa9b8 JB |
6040 | mddev->sysfs_completed = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_completed"); |
6041 | mddev->sysfs_degraded = sysfs_get_dirent_safe(mddev->kobj.sd, "degraded"); | |
5e55e2f5 | 6042 | } else if (mddev->ro == 2) /* auto-readonly not meaningful */ |
fd9d49ca N |
6043 | mddev->ro = 0; |
6044 | ||
1e50915f RB |
6045 | atomic_set(&mddev->max_corr_read_errors, |
6046 | MD_DEFAULT_MAX_CORRECTED_READ_ERRORS); | |
1da177e4 | 6047 | mddev->safemode = 0; |
28c1b9fd GR |
6048 | if (mddev_is_clustered(mddev)) |
6049 | mddev->safemode_delay = 0; | |
6050 | else | |
7c9d5c54 | 6051 | mddev->safemode_delay = DEFAULT_SAFEMODE_DELAY; |
1da177e4 | 6052 | mddev->in_sync = 1; |
0ca69886 | 6053 | smp_wmb(); |
36d091f4 N |
6054 | spin_lock(&mddev->lock); |
6055 | mddev->pers = pers; | |
36d091f4 | 6056 | spin_unlock(&mddev->lock); |
dafb20fa | 6057 | rdev_for_each(rdev, mddev) |
36fad858 | 6058 | if (rdev->raid_disk >= 0) |
e5b521ee | 6059 | sysfs_link_rdev(mddev, rdev); /* failure here is OK */ |
f72ffdd6 | 6060 | |
a4a3d26d N |
6061 | if (mddev->degraded && !mddev->ro) |
6062 | /* This ensures that recovering status is reported immediately | |
6063 | * via sysfs - until a lack of spares is confirmed. | |
6064 | */ | |
6065 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
1da177e4 | 6066 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f72ffdd6 | 6067 | |
2953079c | 6068 | if (mddev->sb_flags) |
850b2b42 | 6069 | md_update_sb(mddev, 0); |
1da177e4 | 6070 | |
d7603b7e | 6071 | md_new_event(mddev); |
1da177e4 | 6072 | return 0; |
b126194c | 6073 | |
d494549a GJ |
6074 | bitmap_abort: |
6075 | mddev_detach(mddev); | |
6076 | if (mddev->private) | |
6077 | pers->free(mddev, mddev->private); | |
6078 | mddev->private = NULL; | |
6079 | module_put(pers->owner); | |
6080 | md_bitmap_destroy(mddev); | |
b126194c | 6081 | abort: |
4bc034d3 N |
6082 | bioset_exit(&mddev->bio_set); |
6083 | bioset_exit(&mddev->sync_set); | |
b126194c | 6084 | return err; |
1da177e4 | 6085 | } |
390ee602 | 6086 | EXPORT_SYMBOL_GPL(md_run); |
1da177e4 | 6087 | |
7e0adbfc | 6088 | int do_md_run(struct mddev *mddev) |
fe60b014 N |
6089 | { |
6090 | int err; | |
6091 | ||
9d4b45d6 | 6092 | set_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
6093 | err = md_run(mddev); |
6094 | if (err) | |
6095 | goto out; | |
e64e4018 | 6096 | err = md_bitmap_load(mddev); |
69e51b44 | 6097 | if (err) { |
e64e4018 | 6098 | md_bitmap_destroy(mddev); |
69e51b44 N |
6099 | goto out; |
6100 | } | |
0fd018af | 6101 | |
28c1b9fd GR |
6102 | if (mddev_is_clustered(mddev)) |
6103 | md_allow_write(mddev); | |
6104 | ||
d5d885fd SL |
6105 | /* run start up tasks that require md_thread */ |
6106 | md_start(mddev); | |
6107 | ||
0fd018af JB |
6108 | md_wakeup_thread(mddev->thread); |
6109 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
6110 | ||
fe60b014 | 6111 | set_capacity(mddev->gendisk, mddev->array_sectors); |
659e56ba | 6112 | revalidate_disk_size(mddev->gendisk, true); |
9d4b45d6 | 6113 | clear_bit(MD_NOT_READY, &mddev->flags); |
f0b4f7e2 | 6114 | mddev->changed = 1; |
fe60b014 | 6115 | kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); |
9d4b45d6 N |
6116 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6117 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
e1a86dbb | 6118 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
fe60b014 | 6119 | out: |
9d4b45d6 | 6120 | clear_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
6121 | return err; |
6122 | } | |
6123 | ||
d5d885fd SL |
6124 | int md_start(struct mddev *mddev) |
6125 | { | |
6126 | int ret = 0; | |
6127 | ||
6128 | if (mddev->pers->start) { | |
6129 | set_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
6130 | md_wakeup_thread(mddev->thread); | |
6131 | ret = mddev->pers->start(mddev); | |
6132 | clear_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
6133 | md_wakeup_thread(mddev->sync_thread); | |
6134 | } | |
6135 | return ret; | |
6136 | } | |
6137 | EXPORT_SYMBOL_GPL(md_start); | |
6138 | ||
fd01b88c | 6139 | static int restart_array(struct mddev *mddev) |
1da177e4 LT |
6140 | { |
6141 | struct gendisk *disk = mddev->gendisk; | |
97b20ef7 N |
6142 | struct md_rdev *rdev; |
6143 | bool has_journal = false; | |
6144 | bool has_readonly = false; | |
1da177e4 | 6145 | |
80fab1d7 | 6146 | /* Complain if it has no devices */ |
1da177e4 | 6147 | if (list_empty(&mddev->disks)) |
80fab1d7 AN |
6148 | return -ENXIO; |
6149 | if (!mddev->pers) | |
6150 | return -EINVAL; | |
6151 | if (!mddev->ro) | |
6152 | return -EBUSY; | |
339421de | 6153 | |
97b20ef7 N |
6154 | rcu_read_lock(); |
6155 | rdev_for_each_rcu(rdev, mddev) { | |
6156 | if (test_bit(Journal, &rdev->flags) && | |
6157 | !test_bit(Faulty, &rdev->flags)) | |
6158 | has_journal = true; | |
6159 | if (bdev_read_only(rdev->bdev)) | |
6160 | has_readonly = true; | |
6161 | } | |
6162 | rcu_read_unlock(); | |
6163 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags) && !has_journal) | |
339421de | 6164 | /* Don't restart rw with journal missing/faulty */ |
339421de | 6165 | return -EINVAL; |
97b20ef7 N |
6166 | if (has_readonly) |
6167 | return -EROFS; | |
339421de | 6168 | |
80fab1d7 AN |
6169 | mddev->safemode = 0; |
6170 | mddev->ro = 0; | |
6171 | set_disk_ro(disk, 0); | |
9d48739e | 6172 | pr_debug("md: %s switched to read-write mode.\n", mdname(mddev)); |
80fab1d7 AN |
6173 | /* Kick recovery or resync if necessary */ |
6174 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6175 | md_wakeup_thread(mddev->thread); | |
6176 | md_wakeup_thread(mddev->sync_thread); | |
00bcb4ac | 6177 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
80fab1d7 | 6178 | return 0; |
1da177e4 LT |
6179 | } |
6180 | ||
fd01b88c | 6181 | static void md_clean(struct mddev *mddev) |
6177b472 N |
6182 | { |
6183 | mddev->array_sectors = 0; | |
6184 | mddev->external_size = 0; | |
6185 | mddev->dev_sectors = 0; | |
6186 | mddev->raid_disks = 0; | |
6187 | mddev->recovery_cp = 0; | |
6188 | mddev->resync_min = 0; | |
6189 | mddev->resync_max = MaxSector; | |
6190 | mddev->reshape_position = MaxSector; | |
6191 | mddev->external = 0; | |
6192 | mddev->persistent = 0; | |
6193 | mddev->level = LEVEL_NONE; | |
6194 | mddev->clevel[0] = 0; | |
6195 | mddev->flags = 0; | |
2953079c | 6196 | mddev->sb_flags = 0; |
6177b472 N |
6197 | mddev->ro = 0; |
6198 | mddev->metadata_type[0] = 0; | |
6199 | mddev->chunk_sectors = 0; | |
6200 | mddev->ctime = mddev->utime = 0; | |
6201 | mddev->layout = 0; | |
6202 | mddev->max_disks = 0; | |
6203 | mddev->events = 0; | |
a8707c08 | 6204 | mddev->can_decrease_events = 0; |
6177b472 | 6205 | mddev->delta_disks = 0; |
2c810cdd | 6206 | mddev->reshape_backwards = 0; |
6177b472 N |
6207 | mddev->new_level = LEVEL_NONE; |
6208 | mddev->new_layout = 0; | |
6209 | mddev->new_chunk_sectors = 0; | |
6210 | mddev->curr_resync = 0; | |
7f7583d4 | 6211 | atomic64_set(&mddev->resync_mismatches, 0); |
6177b472 N |
6212 | mddev->suspend_lo = mddev->suspend_hi = 0; |
6213 | mddev->sync_speed_min = mddev->sync_speed_max = 0; | |
6214 | mddev->recovery = 0; | |
6215 | mddev->in_sync = 0; | |
f0b4f7e2 | 6216 | mddev->changed = 0; |
6177b472 | 6217 | mddev->degraded = 0; |
6177b472 | 6218 | mddev->safemode = 0; |
bd691922 | 6219 | mddev->private = NULL; |
c20c33f0 | 6220 | mddev->cluster_info = NULL; |
6177b472 N |
6221 | mddev->bitmap_info.offset = 0; |
6222 | mddev->bitmap_info.default_offset = 0; | |
6409bb05 | 6223 | mddev->bitmap_info.default_space = 0; |
6177b472 N |
6224 | mddev->bitmap_info.chunksize = 0; |
6225 | mddev->bitmap_info.daemon_sleep = 0; | |
6226 | mddev->bitmap_info.max_write_behind = 0; | |
c20c33f0 | 6227 | mddev->bitmap_info.nodes = 0; |
6177b472 N |
6228 | } |
6229 | ||
fd01b88c | 6230 | static void __md_stop_writes(struct mddev *mddev) |
a047e125 | 6231 | { |
6b6204ee | 6232 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
21e0958e GJ |
6233 | if (work_pending(&mddev->del_work)) |
6234 | flush_workqueue(md_misc_wq); | |
a047e125 | 6235 | if (mddev->sync_thread) { |
a047e125 | 6236 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
a91d5ac0 | 6237 | md_reap_sync_thread(mddev); |
a047e125 N |
6238 | } |
6239 | ||
6240 | del_timer_sync(&mddev->safemode_timer); | |
6241 | ||
034e33f5 SL |
6242 | if (mddev->pers && mddev->pers->quiesce) { |
6243 | mddev->pers->quiesce(mddev, 1); | |
6244 | mddev->pers->quiesce(mddev, 0); | |
6245 | } | |
e64e4018 | 6246 | md_bitmap_flush(mddev); |
a047e125 | 6247 | |
b6d428c6 | 6248 | if (mddev->ro == 0 && |
28c1b9fd | 6249 | ((!mddev->in_sync && !mddev_is_clustered(mddev)) || |
2953079c | 6250 | mddev->sb_flags)) { |
a047e125 | 6251 | /* mark array as shutdown cleanly */ |
28c1b9fd GR |
6252 | if (!mddev_is_clustered(mddev)) |
6253 | mddev->in_sync = 1; | |
a047e125 N |
6254 | md_update_sb(mddev, 1); |
6255 | } | |
69b00b5b GJ |
6256 | /* disable policy to guarantee rdevs free resources for serialization */ |
6257 | mddev->serialize_policy = 0; | |
6258 | mddev_destroy_serial_pool(mddev, NULL, true); | |
a047e125 | 6259 | } |
defad61a | 6260 | |
fd01b88c | 6261 | void md_stop_writes(struct mddev *mddev) |
defad61a | 6262 | { |
29f097c4 | 6263 | mddev_lock_nointr(mddev); |
defad61a N |
6264 | __md_stop_writes(mddev); |
6265 | mddev_unlock(mddev); | |
6266 | } | |
390ee602 | 6267 | EXPORT_SYMBOL_GPL(md_stop_writes); |
a047e125 | 6268 | |
5aa61f42 N |
6269 | static void mddev_detach(struct mddev *mddev) |
6270 | { | |
e64e4018 | 6271 | md_bitmap_wait_behind_writes(mddev); |
6b40bec3 | 6272 | if (mddev->pers && mddev->pers->quiesce && !mddev->suspended) { |
5aa61f42 N |
6273 | mddev->pers->quiesce(mddev, 1); |
6274 | mddev->pers->quiesce(mddev, 0); | |
6275 | } | |
6276 | md_unregister_thread(&mddev->thread); | |
6277 | if (mddev->queue) | |
6278 | blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ | |
6279 | } | |
6280 | ||
5eff3c43 | 6281 | static void __md_stop(struct mddev *mddev) |
6177b472 | 6282 | { |
36d091f4 | 6283 | struct md_personality *pers = mddev->pers; |
e64e4018 | 6284 | md_bitmap_destroy(mddev); |
5aa61f42 | 6285 | mddev_detach(mddev); |
ee5d004f | 6286 | /* Ensure ->event_work is done */ |
21e0958e GJ |
6287 | if (mddev->event_work.func) |
6288 | flush_workqueue(md_misc_wq); | |
36d091f4 | 6289 | spin_lock(&mddev->lock); |
6177b472 | 6290 | mddev->pers = NULL; |
36d091f4 N |
6291 | spin_unlock(&mddev->lock); |
6292 | pers->free(mddev, mddev->private); | |
bd691922 | 6293 | mddev->private = NULL; |
36d091f4 N |
6294 | if (pers->sync_request && mddev->to_remove == NULL) |
6295 | mddev->to_remove = &md_redundancy_group; | |
6296 | module_put(pers->owner); | |
cca9cf90 | 6297 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
6aaa58c9 JW |
6298 | } |
6299 | ||
6300 | void md_stop(struct mddev *mddev) | |
6301 | { | |
6302 | /* stop the array and free an attached data structures. | |
6303 | * This is called from dm-raid | |
6304 | */ | |
6305 | __md_stop(mddev); | |
afeee514 KO |
6306 | bioset_exit(&mddev->bio_set); |
6307 | bioset_exit(&mddev->sync_set); | |
5eff3c43 N |
6308 | } |
6309 | ||
390ee602 | 6310 | EXPORT_SYMBOL_GPL(md_stop); |
6177b472 | 6311 | |
a05b7ea0 | 6312 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) |
a4bd82d0 N |
6313 | { |
6314 | int err = 0; | |
30b8feb7 N |
6315 | int did_freeze = 0; |
6316 | ||
6317 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6318 | did_freeze = 1; | |
6319 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6320 | md_wakeup_thread(mddev->thread); | |
6321 | } | |
f851b60d | 6322 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6323 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6324 | if (mddev->sync_thread) |
30b8feb7 N |
6325 | /* Thread might be blocked waiting for metadata update |
6326 | * which will now never happen */ | |
6327 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6328 | |
2953079c | 6329 | if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
88724bfa | 6330 | return -EBUSY; |
30b8feb7 | 6331 | mddev_unlock(mddev); |
f851b60d N |
6332 | wait_event(resync_wait, !test_bit(MD_RECOVERY_RUNNING, |
6333 | &mddev->recovery)); | |
88724bfa | 6334 | wait_event(mddev->sb_wait, |
2953079c | 6335 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
30b8feb7 N |
6336 | mddev_lock_nointr(mddev); |
6337 | ||
a4bd82d0 | 6338 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6339 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 | 6340 | mddev->sync_thread || |
af8d8e6f | 6341 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6342 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
30b8feb7 N |
6343 | if (did_freeze) { |
6344 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6345 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6346 | md_wakeup_thread(mddev->thread); |
6347 | } | |
a4bd82d0 N |
6348 | err = -EBUSY; |
6349 | goto out; | |
6350 | } | |
6351 | if (mddev->pers) { | |
defad61a | 6352 | __md_stop_writes(mddev); |
a4bd82d0 N |
6353 | |
6354 | err = -ENXIO; | |
6355 | if (mddev->ro==1) | |
6356 | goto out; | |
6357 | mddev->ro = 1; | |
6358 | set_disk_ro(mddev->gendisk, 1); | |
6359 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d N |
6360 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
6361 | md_wakeup_thread(mddev->thread); | |
00bcb4ac | 6362 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
30b8feb7 | 6363 | err = 0; |
a4bd82d0 N |
6364 | } |
6365 | out: | |
6366 | mutex_unlock(&mddev->open_mutex); | |
6367 | return err; | |
6368 | } | |
6369 | ||
9e653b63 N |
6370 | /* mode: |
6371 | * 0 - completely stop and dis-assemble array | |
9e653b63 N |
6372 | * 2 - stop but do not disassemble array |
6373 | */ | |
f72ffdd6 | 6374 | static int do_md_stop(struct mddev *mddev, int mode, |
a05b7ea0 | 6375 | struct block_device *bdev) |
1da177e4 | 6376 | { |
1da177e4 | 6377 | struct gendisk *disk = mddev->gendisk; |
3cb03002 | 6378 | struct md_rdev *rdev; |
30b8feb7 N |
6379 | int did_freeze = 0; |
6380 | ||
6381 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6382 | did_freeze = 1; | |
6383 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6384 | md_wakeup_thread(mddev->thread); | |
6385 | } | |
f851b60d | 6386 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6387 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6388 | if (mddev->sync_thread) |
30b8feb7 N |
6389 | /* Thread might be blocked waiting for metadata update |
6390 | * which will now never happen */ | |
6391 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6392 | |
30b8feb7 | 6393 | mddev_unlock(mddev); |
f851b60d N |
6394 | wait_event(resync_wait, (mddev->sync_thread == NULL && |
6395 | !test_bit(MD_RECOVERY_RUNNING, | |
6396 | &mddev->recovery))); | |
30b8feb7 | 6397 | mddev_lock_nointr(mddev); |
1da177e4 | 6398 | |
c8c00a69 | 6399 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6400 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 N |
6401 | mddev->sysfs_active || |
6402 | mddev->sync_thread || | |
af8d8e6f | 6403 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6404 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
6e17b027 | 6405 | mutex_unlock(&mddev->open_mutex); |
30b8feb7 N |
6406 | if (did_freeze) { |
6407 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6408 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6409 | md_wakeup_thread(mddev->thread); |
6410 | } | |
260fa034 N |
6411 | return -EBUSY; |
6412 | } | |
6e17b027 | 6413 | if (mddev->pers) { |
a4bd82d0 N |
6414 | if (mddev->ro) |
6415 | set_disk_ro(disk, 0); | |
409c57f3 | 6416 | |
defad61a | 6417 | __md_stop_writes(mddev); |
5eff3c43 | 6418 | __md_stop(mddev); |
6177b472 | 6419 | |
a4bd82d0 | 6420 | /* tell userspace to handle 'inactive' */ |
00bcb4ac | 6421 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0d4ca600 | 6422 | |
dafb20fa | 6423 | rdev_for_each(rdev, mddev) |
36fad858 NK |
6424 | if (rdev->raid_disk >= 0) |
6425 | sysfs_unlink_rdev(mddev, rdev); | |
c4647292 | 6426 | |
a4bd82d0 | 6427 | set_capacity(disk, 0); |
6e17b027 | 6428 | mutex_unlock(&mddev->open_mutex); |
f0b4f7e2 | 6429 | mddev->changed = 1; |
659e56ba | 6430 | revalidate_disk_size(disk, true); |
0d4ca600 | 6431 | |
a4bd82d0 N |
6432 | if (mddev->ro) |
6433 | mddev->ro = 0; | |
6e17b027 N |
6434 | } else |
6435 | mutex_unlock(&mddev->open_mutex); | |
1da177e4 LT |
6436 | /* |
6437 | * Free resources if final stop | |
6438 | */ | |
9e653b63 | 6439 | if (mode == 0) { |
9d48739e | 6440 | pr_info("md: %s stopped.\n", mdname(mddev)); |
1da177e4 | 6441 | |
c3d9714e | 6442 | if (mddev->bitmap_info.file) { |
4af1a041 N |
6443 | struct file *f = mddev->bitmap_info.file; |
6444 | spin_lock(&mddev->lock); | |
c3d9714e | 6445 | mddev->bitmap_info.file = NULL; |
4af1a041 N |
6446 | spin_unlock(&mddev->lock); |
6447 | fput(f); | |
978f946b | 6448 | } |
c3d9714e | 6449 | mddev->bitmap_info.offset = 0; |
978f946b | 6450 | |
1da177e4 LT |
6451 | export_array(mddev); |
6452 | ||
6177b472 | 6453 | md_clean(mddev); |
efeb53c0 N |
6454 | if (mddev->hold_active == UNTIL_STOP) |
6455 | mddev->hold_active = 0; | |
a4bd82d0 | 6456 | } |
d7603b7e | 6457 | md_new_event(mddev); |
00bcb4ac | 6458 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6e17b027 | 6459 | return 0; |
1da177e4 LT |
6460 | } |
6461 | ||
fdee8ae4 | 6462 | #ifndef MODULE |
fd01b88c | 6463 | static void autorun_array(struct mddev *mddev) |
1da177e4 | 6464 | { |
3cb03002 | 6465 | struct md_rdev *rdev; |
1da177e4 LT |
6466 | int err; |
6467 | ||
a757e64c | 6468 | if (list_empty(&mddev->disks)) |
1da177e4 | 6469 | return; |
1da177e4 | 6470 | |
9d48739e | 6471 | pr_info("md: running: "); |
1da177e4 | 6472 | |
dafb20fa | 6473 | rdev_for_each(rdev, mddev) { |
1da177e4 | 6474 | char b[BDEVNAME_SIZE]; |
9d48739e | 6475 | pr_cont("<%s>", bdevname(rdev->bdev,b)); |
1da177e4 | 6476 | } |
9d48739e | 6477 | pr_cont("\n"); |
1da177e4 | 6478 | |
d710e138 | 6479 | err = do_md_run(mddev); |
1da177e4 | 6480 | if (err) { |
9d48739e | 6481 | pr_warn("md: do_md_run() returned %d\n", err); |
a05b7ea0 | 6482 | do_md_stop(mddev, 0, NULL); |
1da177e4 LT |
6483 | } |
6484 | } | |
6485 | ||
6486 | /* | |
6487 | * lets try to run arrays based on all disks that have arrived | |
6488 | * until now. (those are in pending_raid_disks) | |
6489 | * | |
6490 | * the method: pick the first pending disk, collect all disks with | |
6491 | * the same UUID, remove all from the pending list and put them into | |
6492 | * the 'same_array' list. Then order this list based on superblock | |
6493 | * update time (freshest comes first), kick out 'old' disks and | |
6494 | * compare superblocks. If everything's fine then run it. | |
6495 | * | |
6496 | * If "unit" is allocated, then bump its reference count | |
6497 | */ | |
6498 | static void autorun_devices(int part) | |
6499 | { | |
3cb03002 | 6500 | struct md_rdev *rdev0, *rdev, *tmp; |
fd01b88c | 6501 | struct mddev *mddev; |
1da177e4 LT |
6502 | char b[BDEVNAME_SIZE]; |
6503 | ||
9d48739e | 6504 | pr_info("md: autorun ...\n"); |
1da177e4 | 6505 | while (!list_empty(&pending_raid_disks)) { |
e8703fe1 | 6506 | int unit; |
1da177e4 | 6507 | dev_t dev; |
ad01c9e3 | 6508 | LIST_HEAD(candidates); |
1da177e4 | 6509 | rdev0 = list_entry(pending_raid_disks.next, |
3cb03002 | 6510 | struct md_rdev, same_set); |
1da177e4 | 6511 | |
9d48739e | 6512 | pr_debug("md: considering %s ...\n", bdevname(rdev0->bdev,b)); |
1da177e4 | 6513 | INIT_LIST_HEAD(&candidates); |
159ec1fc | 6514 | rdev_for_each_list(rdev, tmp, &pending_raid_disks) |
1da177e4 | 6515 | if (super_90_load(rdev, rdev0, 0) >= 0) { |
9d48739e N |
6516 | pr_debug("md: adding %s ...\n", |
6517 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
6518 | list_move(&rdev->same_set, &candidates); |
6519 | } | |
6520 | /* | |
6521 | * now we have a set of devices, with all of them having | |
6522 | * mostly sane superblocks. It's time to allocate the | |
6523 | * mddev. | |
6524 | */ | |
e8703fe1 N |
6525 | if (part) { |
6526 | dev = MKDEV(mdp_major, | |
6527 | rdev0->preferred_minor << MdpMinorShift); | |
6528 | unit = MINOR(dev) >> MdpMinorShift; | |
6529 | } else { | |
6530 | dev = MKDEV(MD_MAJOR, rdev0->preferred_minor); | |
6531 | unit = MINOR(dev); | |
6532 | } | |
6533 | if (rdev0->preferred_minor != unit) { | |
9d48739e N |
6534 | pr_warn("md: unit number in %s is bad: %d\n", |
6535 | bdevname(rdev0->bdev, b), rdev0->preferred_minor); | |
1da177e4 LT |
6536 | break; |
6537 | } | |
1da177e4 | 6538 | |
28144f99 | 6539 | md_probe(dev); |
1da177e4 | 6540 | mddev = mddev_find(dev); |
9bbbca3a NB |
6541 | if (!mddev || !mddev->gendisk) { |
6542 | if (mddev) | |
6543 | mddev_put(mddev); | |
1da177e4 LT |
6544 | break; |
6545 | } | |
f72ffdd6 | 6546 | if (mddev_lock(mddev)) |
9d48739e | 6547 | pr_warn("md: %s locked, cannot run\n", mdname(mddev)); |
1da177e4 LT |
6548 | else if (mddev->raid_disks || mddev->major_version |
6549 | || !list_empty(&mddev->disks)) { | |
9d48739e | 6550 | pr_warn("md: %s already running, cannot run %s\n", |
1da177e4 LT |
6551 | mdname(mddev), bdevname(rdev0->bdev,b)); |
6552 | mddev_unlock(mddev); | |
6553 | } else { | |
9d48739e | 6554 | pr_debug("md: created %s\n", mdname(mddev)); |
1ec4a939 | 6555 | mddev->persistent = 1; |
159ec1fc | 6556 | rdev_for_each_list(rdev, tmp, &candidates) { |
1da177e4 LT |
6557 | list_del_init(&rdev->same_set); |
6558 | if (bind_rdev_to_array(rdev, mddev)) | |
6559 | export_rdev(rdev); | |
6560 | } | |
6561 | autorun_array(mddev); | |
6562 | mddev_unlock(mddev); | |
6563 | } | |
6564 | /* on success, candidates will be empty, on error | |
6565 | * it won't... | |
6566 | */ | |
159ec1fc | 6567 | rdev_for_each_list(rdev, tmp, &candidates) { |
4b80991c | 6568 | list_del_init(&rdev->same_set); |
1da177e4 | 6569 | export_rdev(rdev); |
4b80991c | 6570 | } |
1da177e4 LT |
6571 | mddev_put(mddev); |
6572 | } | |
9d48739e | 6573 | pr_info("md: ... autorun DONE.\n"); |
1da177e4 | 6574 | } |
fdee8ae4 | 6575 | #endif /* !MODULE */ |
1da177e4 | 6576 | |
f72ffdd6 | 6577 | static int get_version(void __user *arg) |
1da177e4 LT |
6578 | { |
6579 | mdu_version_t ver; | |
6580 | ||
6581 | ver.major = MD_MAJOR_VERSION; | |
6582 | ver.minor = MD_MINOR_VERSION; | |
6583 | ver.patchlevel = MD_PATCHLEVEL_VERSION; | |
6584 | ||
6585 | if (copy_to_user(arg, &ver, sizeof(ver))) | |
6586 | return -EFAULT; | |
6587 | ||
6588 | return 0; | |
6589 | } | |
6590 | ||
f72ffdd6 | 6591 | static int get_array_info(struct mddev *mddev, void __user *arg) |
1da177e4 LT |
6592 | { |
6593 | mdu_array_info_t info; | |
a9f326eb | 6594 | int nr,working,insync,failed,spare; |
3cb03002 | 6595 | struct md_rdev *rdev; |
1da177e4 | 6596 | |
1ca69c4b N |
6597 | nr = working = insync = failed = spare = 0; |
6598 | rcu_read_lock(); | |
6599 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 6600 | nr++; |
b2d444d7 | 6601 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
6602 | failed++; |
6603 | else { | |
6604 | working++; | |
b2d444d7 | 6605 | if (test_bit(In_sync, &rdev->flags)) |
f72ffdd6 | 6606 | insync++; |
b347af81 SL |
6607 | else if (test_bit(Journal, &rdev->flags)) |
6608 | /* TODO: add journal count to md_u.h */ | |
6609 | ; | |
1da177e4 LT |
6610 | else |
6611 | spare++; | |
6612 | } | |
6613 | } | |
1ca69c4b | 6614 | rcu_read_unlock(); |
1da177e4 LT |
6615 | |
6616 | info.major_version = mddev->major_version; | |
6617 | info.minor_version = mddev->minor_version; | |
6618 | info.patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6619 | info.ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 6620 | info.level = mddev->level; |
58c0fed4 AN |
6621 | info.size = mddev->dev_sectors / 2; |
6622 | if (info.size != mddev->dev_sectors / 2) /* overflow */ | |
284ae7ca | 6623 | info.size = -1; |
1da177e4 LT |
6624 | info.nr_disks = nr; |
6625 | info.raid_disks = mddev->raid_disks; | |
6626 | info.md_minor = mddev->md_minor; | |
6627 | info.not_persistent= !mddev->persistent; | |
6628 | ||
9ebc6ef1 | 6629 | info.utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
6630 | info.state = 0; |
6631 | if (mddev->in_sync) | |
6632 | info.state = (1<<MD_SB_CLEAN); | |
c3d9714e | 6633 | if (mddev->bitmap && mddev->bitmap_info.offset) |
9bd35920 | 6634 | info.state |= (1<<MD_SB_BITMAP_PRESENT); |
ca8895d9 GR |
6635 | if (mddev_is_clustered(mddev)) |
6636 | info.state |= (1<<MD_SB_CLUSTERED); | |
a9f326eb | 6637 | info.active_disks = insync; |
1da177e4 LT |
6638 | info.working_disks = working; |
6639 | info.failed_disks = failed; | |
6640 | info.spare_disks = spare; | |
6641 | ||
6642 | info.layout = mddev->layout; | |
9d8f0363 | 6643 | info.chunk_size = mddev->chunk_sectors << 9; |
1da177e4 LT |
6644 | |
6645 | if (copy_to_user(arg, &info, sizeof(info))) | |
6646 | return -EFAULT; | |
6647 | ||
6648 | return 0; | |
6649 | } | |
6650 | ||
f72ffdd6 | 6651 | static int get_bitmap_file(struct mddev *mddev, void __user * arg) |
32a7627c N |
6652 | { |
6653 | mdu_bitmap_file_t *file = NULL; /* too big for stack allocation */ | |
f4ad3d38 | 6654 | char *ptr; |
4af1a041 | 6655 | int err; |
32a7627c | 6656 | |
b6878d9e | 6657 | file = kzalloc(sizeof(*file), GFP_NOIO); |
32a7627c | 6658 | if (!file) |
4af1a041 | 6659 | return -ENOMEM; |
32a7627c | 6660 | |
4af1a041 N |
6661 | err = 0; |
6662 | spin_lock(&mddev->lock); | |
25eafe1a BR |
6663 | /* bitmap enabled */ |
6664 | if (mddev->bitmap_info.file) { | |
6665 | ptr = file_path(mddev->bitmap_info.file, file->pathname, | |
6666 | sizeof(file->pathname)); | |
6667 | if (IS_ERR(ptr)) | |
6668 | err = PTR_ERR(ptr); | |
6669 | else | |
6670 | memmove(file->pathname, ptr, | |
6671 | sizeof(file->pathname)-(ptr-file->pathname)); | |
6672 | } | |
4af1a041 | 6673 | spin_unlock(&mddev->lock); |
32a7627c | 6674 | |
4af1a041 N |
6675 | if (err == 0 && |
6676 | copy_to_user(arg, file, sizeof(*file))) | |
32a7627c | 6677 | err = -EFAULT; |
4af1a041 | 6678 | |
32a7627c N |
6679 | kfree(file); |
6680 | return err; | |
6681 | } | |
6682 | ||
f72ffdd6 | 6683 | static int get_disk_info(struct mddev *mddev, void __user * arg) |
1da177e4 LT |
6684 | { |
6685 | mdu_disk_info_t info; | |
3cb03002 | 6686 | struct md_rdev *rdev; |
1da177e4 LT |
6687 | |
6688 | if (copy_from_user(&info, arg, sizeof(info))) | |
6689 | return -EFAULT; | |
6690 | ||
1ca69c4b | 6691 | rcu_read_lock(); |
57d051dc | 6692 | rdev = md_find_rdev_nr_rcu(mddev, info.number); |
1da177e4 LT |
6693 | if (rdev) { |
6694 | info.major = MAJOR(rdev->bdev->bd_dev); | |
6695 | info.minor = MINOR(rdev->bdev->bd_dev); | |
6696 | info.raid_disk = rdev->raid_disk; | |
6697 | info.state = 0; | |
b2d444d7 | 6698 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 6699 | info.state |= (1<<MD_DISK_FAULTY); |
b2d444d7 | 6700 | else if (test_bit(In_sync, &rdev->flags)) { |
1da177e4 LT |
6701 | info.state |= (1<<MD_DISK_ACTIVE); |
6702 | info.state |= (1<<MD_DISK_SYNC); | |
6703 | } | |
9efdca16 | 6704 | if (test_bit(Journal, &rdev->flags)) |
bac624f3 | 6705 | info.state |= (1<<MD_DISK_JOURNAL); |
8ddf9efe N |
6706 | if (test_bit(WriteMostly, &rdev->flags)) |
6707 | info.state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
6708 | if (test_bit(FailFast, &rdev->flags)) |
6709 | info.state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 LT |
6710 | } else { |
6711 | info.major = info.minor = 0; | |
6712 | info.raid_disk = -1; | |
6713 | info.state = (1<<MD_DISK_REMOVED); | |
6714 | } | |
1ca69c4b | 6715 | rcu_read_unlock(); |
1da177e4 LT |
6716 | |
6717 | if (copy_to_user(arg, &info, sizeof(info))) | |
6718 | return -EFAULT; | |
6719 | ||
6720 | return 0; | |
6721 | } | |
6722 | ||
7e0adbfc | 6723 | int md_add_new_disk(struct mddev *mddev, struct mdu_disk_info_s *info) |
1da177e4 LT |
6724 | { |
6725 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 6726 | struct md_rdev *rdev; |
1da177e4 LT |
6727 | dev_t dev = MKDEV(info->major,info->minor); |
6728 | ||
1aee41f6 GR |
6729 | if (mddev_is_clustered(mddev) && |
6730 | !(info->state & ((1 << MD_DISK_CLUSTER_ADD) | (1 << MD_DISK_CANDIDATE)))) { | |
9d48739e N |
6731 | pr_warn("%s: Cannot add to clustered mddev.\n", |
6732 | mdname(mddev)); | |
1aee41f6 GR |
6733 | return -EINVAL; |
6734 | } | |
6735 | ||
1da177e4 LT |
6736 | if (info->major != MAJOR(dev) || info->minor != MINOR(dev)) |
6737 | return -EOVERFLOW; | |
6738 | ||
6739 | if (!mddev->raid_disks) { | |
6740 | int err; | |
6741 | /* expecting a device which has a superblock */ | |
6742 | rdev = md_import_device(dev, mddev->major_version, mddev->minor_version); | |
6743 | if (IS_ERR(rdev)) { | |
9d48739e | 6744 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6745 | PTR_ERR(rdev)); |
6746 | return PTR_ERR(rdev); | |
6747 | } | |
6748 | if (!list_empty(&mddev->disks)) { | |
3cb03002 N |
6749 | struct md_rdev *rdev0 |
6750 | = list_entry(mddev->disks.next, | |
6751 | struct md_rdev, same_set); | |
a9f326eb | 6752 | err = super_types[mddev->major_version] |
1da177e4 LT |
6753 | .load_super(rdev, rdev0, mddev->minor_version); |
6754 | if (err < 0) { | |
9d48739e | 6755 | pr_warn("md: %s has different UUID to %s\n", |
f72ffdd6 | 6756 | bdevname(rdev->bdev,b), |
1da177e4 LT |
6757 | bdevname(rdev0->bdev,b2)); |
6758 | export_rdev(rdev); | |
6759 | return -EINVAL; | |
6760 | } | |
6761 | } | |
6762 | err = bind_rdev_to_array(rdev, mddev); | |
6763 | if (err) | |
6764 | export_rdev(rdev); | |
6765 | return err; | |
6766 | } | |
6767 | ||
6768 | /* | |
7e0adbfc | 6769 | * md_add_new_disk can be used once the array is assembled |
1da177e4 LT |
6770 | * to add "hot spares". They must already have a superblock |
6771 | * written | |
6772 | */ | |
6773 | if (mddev->pers) { | |
6774 | int err; | |
6775 | if (!mddev->pers->hot_add_disk) { | |
9d48739e N |
6776 | pr_warn("%s: personality does not support diskops!\n", |
6777 | mdname(mddev)); | |
1da177e4 LT |
6778 | return -EINVAL; |
6779 | } | |
7b1e35f6 N |
6780 | if (mddev->persistent) |
6781 | rdev = md_import_device(dev, mddev->major_version, | |
6782 | mddev->minor_version); | |
6783 | else | |
6784 | rdev = md_import_device(dev, -1, -1); | |
1da177e4 | 6785 | if (IS_ERR(rdev)) { |
9d48739e | 6786 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6787 | PTR_ERR(rdev)); |
6788 | return PTR_ERR(rdev); | |
6789 | } | |
1a855a06 | 6790 | /* set saved_raid_disk if appropriate */ |
41158c7e N |
6791 | if (!mddev->persistent) { |
6792 | if (info->state & (1<<MD_DISK_SYNC) && | |
bf572541 | 6793 | info->raid_disk < mddev->raid_disks) { |
41158c7e | 6794 | rdev->raid_disk = info->raid_disk; |
bf572541 | 6795 | set_bit(In_sync, &rdev->flags); |
8313b8e5 | 6796 | clear_bit(Bitmap_sync, &rdev->flags); |
bf572541 | 6797 | } else |
41158c7e | 6798 | rdev->raid_disk = -1; |
f466722c | 6799 | rdev->saved_raid_disk = rdev->raid_disk; |
41158c7e N |
6800 | } else |
6801 | super_types[mddev->major_version]. | |
6802 | validate_super(mddev, rdev); | |
bedd86b7 | 6803 | if ((info->state & (1<<MD_DISK_SYNC)) && |
f4563091 | 6804 | rdev->raid_disk != info->raid_disk) { |
bedd86b7 N |
6805 | /* This was a hot-add request, but events doesn't |
6806 | * match, so reject it. | |
6807 | */ | |
6808 | export_rdev(rdev); | |
6809 | return -EINVAL; | |
6810 | } | |
6811 | ||
b2d444d7 | 6812 | clear_bit(In_sync, &rdev->flags); /* just to be sure */ |
8ddf9efe N |
6813 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6814 | set_bit(WriteMostly, &rdev->flags); | |
575a80fa N |
6815 | else |
6816 | clear_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6817 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6818 | set_bit(FailFast, &rdev->flags); | |
6819 | else | |
6820 | clear_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6821 | |
f6b6ec5c SL |
6822 | if (info->state & (1<<MD_DISK_JOURNAL)) { |
6823 | struct md_rdev *rdev2; | |
6824 | bool has_journal = false; | |
6825 | ||
6826 | /* make sure no existing journal disk */ | |
6827 | rdev_for_each(rdev2, mddev) { | |
6828 | if (test_bit(Journal, &rdev2->flags)) { | |
6829 | has_journal = true; | |
6830 | break; | |
6831 | } | |
6832 | } | |
230b55fa | 6833 | if (has_journal || mddev->bitmap) { |
f6b6ec5c SL |
6834 | export_rdev(rdev); |
6835 | return -EBUSY; | |
6836 | } | |
bac624f3 | 6837 | set_bit(Journal, &rdev->flags); |
f6b6ec5c | 6838 | } |
1aee41f6 GR |
6839 | /* |
6840 | * check whether the device shows up in other nodes | |
6841 | */ | |
6842 | if (mddev_is_clustered(mddev)) { | |
dbb64f86 | 6843 | if (info->state & (1 << MD_DISK_CANDIDATE)) |
1aee41f6 | 6844 | set_bit(Candidate, &rdev->flags); |
dbb64f86 | 6845 | else if (info->state & (1 << MD_DISK_CLUSTER_ADD)) { |
1aee41f6 | 6846 | /* --add initiated by this node */ |
dbb64f86 | 6847 | err = md_cluster_ops->add_new_disk(mddev, rdev); |
1aee41f6 | 6848 | if (err) { |
1aee41f6 GR |
6849 | export_rdev(rdev); |
6850 | return err; | |
6851 | } | |
6852 | } | |
6853 | } | |
6854 | ||
1da177e4 LT |
6855 | rdev->raid_disk = -1; |
6856 | err = bind_rdev_to_array(rdev, mddev); | |
dbb64f86 | 6857 | |
1da177e4 LT |
6858 | if (err) |
6859 | export_rdev(rdev); | |
dbb64f86 GR |
6860 | |
6861 | if (mddev_is_clustered(mddev)) { | |
e566aef1 GJ |
6862 | if (info->state & (1 << MD_DISK_CANDIDATE)) { |
6863 | if (!err) { | |
6864 | err = md_cluster_ops->new_disk_ack(mddev, | |
6865 | err == 0); | |
6866 | if (err) | |
6867 | md_kick_rdev_from_array(rdev); | |
6868 | } | |
6869 | } else { | |
dbb64f86 GR |
6870 | if (err) |
6871 | md_cluster_ops->add_new_disk_cancel(mddev); | |
6872 | else | |
6873 | err = add_bound_rdev(rdev); | |
6874 | } | |
6875 | ||
6876 | } else if (!err) | |
a6da4ef8 | 6877 | err = add_bound_rdev(rdev); |
dbb64f86 | 6878 | |
1da177e4 LT |
6879 | return err; |
6880 | } | |
6881 | ||
7e0adbfc | 6882 | /* otherwise, md_add_new_disk is only allowed |
1da177e4 LT |
6883 | * for major_version==0 superblocks |
6884 | */ | |
6885 | if (mddev->major_version != 0) { | |
9d48739e | 6886 | pr_warn("%s: ADD_NEW_DISK not supported\n", mdname(mddev)); |
1da177e4 LT |
6887 | return -EINVAL; |
6888 | } | |
6889 | ||
6890 | if (!(info->state & (1<<MD_DISK_FAULTY))) { | |
6891 | int err; | |
d710e138 | 6892 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6893 | if (IS_ERR(rdev)) { |
9d48739e | 6894 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6895 | PTR_ERR(rdev)); |
6896 | return PTR_ERR(rdev); | |
6897 | } | |
6898 | rdev->desc_nr = info->number; | |
6899 | if (info->raid_disk < mddev->raid_disks) | |
6900 | rdev->raid_disk = info->raid_disk; | |
6901 | else | |
6902 | rdev->raid_disk = -1; | |
6903 | ||
1da177e4 | 6904 | if (rdev->raid_disk < mddev->raid_disks) |
b2d444d7 N |
6905 | if (info->state & (1<<MD_DISK_SYNC)) |
6906 | set_bit(In_sync, &rdev->flags); | |
1da177e4 | 6907 | |
8ddf9efe N |
6908 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6909 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6910 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6911 | set_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6912 | |
1da177e4 | 6913 | if (!mddev->persistent) { |
9d48739e | 6914 | pr_debug("md: nonpersistent superblock ...\n"); |
77304d2a MS |
6915 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
6916 | } else | |
57b2caa3 | 6917 | rdev->sb_start = calc_dev_sboffset(rdev); |
8190e754 | 6918 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6919 | |
2bf071bf N |
6920 | err = bind_rdev_to_array(rdev, mddev); |
6921 | if (err) { | |
6922 | export_rdev(rdev); | |
6923 | return err; | |
6924 | } | |
1da177e4 LT |
6925 | } |
6926 | ||
6927 | return 0; | |
6928 | } | |
6929 | ||
f72ffdd6 | 6930 | static int hot_remove_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6931 | { |
6932 | char b[BDEVNAME_SIZE]; | |
3cb03002 | 6933 | struct md_rdev *rdev; |
1da177e4 | 6934 | |
c42a0e26 YY |
6935 | if (!mddev->pers) |
6936 | return -ENODEV; | |
6937 | ||
1da177e4 LT |
6938 | rdev = find_rdev(mddev, dev); |
6939 | if (!rdev) | |
6940 | return -ENXIO; | |
6941 | ||
2910ff17 GR |
6942 | if (rdev->raid_disk < 0) |
6943 | goto kick_rdev; | |
293467aa | 6944 | |
3ea8929d N |
6945 | clear_bit(Blocked, &rdev->flags); |
6946 | remove_and_add_spares(mddev, rdev); | |
6947 | ||
1da177e4 LT |
6948 | if (rdev->raid_disk >= 0) |
6949 | goto busy; | |
6950 | ||
2910ff17 | 6951 | kick_rdev: |
54a88392 | 6952 | if (mddev_is_clustered(mddev)) |
88bcfef7 GR |
6953 | md_cluster_ops->remove_disk(mddev, rdev); |
6954 | ||
fb56dfef | 6955 | md_kick_rdev_from_array(rdev); |
2953079c | 6956 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6957 | if (mddev->thread) |
6958 | md_wakeup_thread(mddev->thread); | |
6959 | else | |
6960 | md_update_sb(mddev, 1); | |
d7603b7e | 6961 | md_new_event(mddev); |
1da177e4 LT |
6962 | |
6963 | return 0; | |
6964 | busy: | |
9d48739e N |
6965 | pr_debug("md: cannot remove active disk %s from %s ...\n", |
6966 | bdevname(rdev->bdev,b), mdname(mddev)); | |
1da177e4 LT |
6967 | return -EBUSY; |
6968 | } | |
6969 | ||
f72ffdd6 | 6970 | static int hot_add_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6971 | { |
6972 | char b[BDEVNAME_SIZE]; | |
6973 | int err; | |
3cb03002 | 6974 | struct md_rdev *rdev; |
1da177e4 LT |
6975 | |
6976 | if (!mddev->pers) | |
6977 | return -ENODEV; | |
6978 | ||
6979 | if (mddev->major_version != 0) { | |
9d48739e | 6980 | pr_warn("%s: HOT_ADD may only be used with version-0 superblocks.\n", |
1da177e4 LT |
6981 | mdname(mddev)); |
6982 | return -EINVAL; | |
6983 | } | |
6984 | if (!mddev->pers->hot_add_disk) { | |
9d48739e | 6985 | pr_warn("%s: personality does not support diskops!\n", |
1da177e4 LT |
6986 | mdname(mddev)); |
6987 | return -EINVAL; | |
6988 | } | |
6989 | ||
d710e138 | 6990 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6991 | if (IS_ERR(rdev)) { |
9d48739e | 6992 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6993 | PTR_ERR(rdev)); |
6994 | return -EINVAL; | |
6995 | } | |
6996 | ||
6997 | if (mddev->persistent) | |
57b2caa3 | 6998 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 6999 | else |
77304d2a | 7000 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
1da177e4 | 7001 | |
8190e754 | 7002 | rdev->sectors = rdev->sb_start; |
1da177e4 | 7003 | |
b2d444d7 | 7004 | if (test_bit(Faulty, &rdev->flags)) { |
9d48739e | 7005 | pr_warn("md: can not hot-add faulty %s disk to %s!\n", |
1da177e4 LT |
7006 | bdevname(rdev->bdev,b), mdname(mddev)); |
7007 | err = -EINVAL; | |
7008 | goto abort_export; | |
7009 | } | |
293467aa | 7010 | |
b2d444d7 | 7011 | clear_bit(In_sync, &rdev->flags); |
1da177e4 | 7012 | rdev->desc_nr = -1; |
5842730d | 7013 | rdev->saved_raid_disk = -1; |
2bf071bf N |
7014 | err = bind_rdev_to_array(rdev, mddev); |
7015 | if (err) | |
2aa82191 | 7016 | goto abort_export; |
1da177e4 LT |
7017 | |
7018 | /* | |
7019 | * The rest should better be atomic, we can have disk failures | |
7020 | * noticed in interrupt contexts ... | |
7021 | */ | |
7022 | ||
1da177e4 LT |
7023 | rdev->raid_disk = -1; |
7024 | ||
2953079c | 7025 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
7026 | if (!mddev->thread) |
7027 | md_update_sb(mddev, 1); | |
1da177e4 LT |
7028 | /* |
7029 | * Kick recovery, maybe this spare has to be added to the | |
7030 | * array immediately. | |
7031 | */ | |
7032 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7033 | md_wakeup_thread(mddev->thread); | |
d7603b7e | 7034 | md_new_event(mddev); |
1da177e4 LT |
7035 | return 0; |
7036 | ||
1da177e4 LT |
7037 | abort_export: |
7038 | export_rdev(rdev); | |
7039 | return err; | |
7040 | } | |
7041 | ||
fd01b88c | 7042 | static int set_bitmap_file(struct mddev *mddev, int fd) |
32a7627c | 7043 | { |
035328c2 | 7044 | int err = 0; |
32a7627c | 7045 | |
36fa3063 | 7046 | if (mddev->pers) { |
d66b1b39 | 7047 | if (!mddev->pers->quiesce || !mddev->thread) |
36fa3063 N |
7048 | return -EBUSY; |
7049 | if (mddev->recovery || mddev->sync_thread) | |
7050 | return -EBUSY; | |
7051 | /* we should be able to change the bitmap.. */ | |
7052 | } | |
32a7627c | 7053 | |
36fa3063 | 7054 | if (fd >= 0) { |
035328c2 | 7055 | struct inode *inode; |
1e594bb2 N |
7056 | struct file *f; |
7057 | ||
7058 | if (mddev->bitmap || mddev->bitmap_info.file) | |
36fa3063 | 7059 | return -EEXIST; /* cannot add when bitmap is present */ |
1e594bb2 | 7060 | f = fget(fd); |
32a7627c | 7061 | |
1e594bb2 | 7062 | if (f == NULL) { |
9d48739e N |
7063 | pr_warn("%s: error: failed to get bitmap file\n", |
7064 | mdname(mddev)); | |
36fa3063 N |
7065 | return -EBADF; |
7066 | } | |
7067 | ||
1e594bb2 | 7068 | inode = f->f_mapping->host; |
035328c2 | 7069 | if (!S_ISREG(inode->i_mode)) { |
9d48739e N |
7070 | pr_warn("%s: error: bitmap file must be a regular file\n", |
7071 | mdname(mddev)); | |
035328c2 | 7072 | err = -EBADF; |
1e594bb2 | 7073 | } else if (!(f->f_mode & FMODE_WRITE)) { |
9d48739e N |
7074 | pr_warn("%s: error: bitmap file must open for write\n", |
7075 | mdname(mddev)); | |
035328c2 N |
7076 | err = -EBADF; |
7077 | } else if (atomic_read(&inode->i_writecount) != 1) { | |
9d48739e N |
7078 | pr_warn("%s: error: bitmap file is already in use\n", |
7079 | mdname(mddev)); | |
035328c2 N |
7080 | err = -EBUSY; |
7081 | } | |
7082 | if (err) { | |
1e594bb2 | 7083 | fput(f); |
36fa3063 N |
7084 | return err; |
7085 | } | |
1e594bb2 | 7086 | mddev->bitmap_info.file = f; |
c3d9714e | 7087 | mddev->bitmap_info.offset = 0; /* file overrides offset */ |
36fa3063 N |
7088 | } else if (mddev->bitmap == NULL) |
7089 | return -ENOENT; /* cannot remove what isn't there */ | |
7090 | err = 0; | |
7091 | if (mddev->pers) { | |
69e51b44 | 7092 | if (fd >= 0) { |
f9209a32 GR |
7093 | struct bitmap *bitmap; |
7094 | ||
e64e4018 | 7095 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7096 | mddev_suspend(mddev); |
f9209a32 GR |
7097 | if (!IS_ERR(bitmap)) { |
7098 | mddev->bitmap = bitmap; | |
e64e4018 | 7099 | err = md_bitmap_load(mddev); |
ba599aca N |
7100 | } else |
7101 | err = PTR_ERR(bitmap); | |
52a0d49d | 7102 | if (err) { |
e64e4018 | 7103 | md_bitmap_destroy(mddev); |
52a0d49d N |
7104 | fd = -1; |
7105 | } | |
9e1cc0a5 | 7106 | mddev_resume(mddev); |
52a0d49d | 7107 | } else if (fd < 0) { |
9e1cc0a5 | 7108 | mddev_suspend(mddev); |
e64e4018 | 7109 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7110 | mddev_resume(mddev); |
d7375ab3 | 7111 | } |
d7375ab3 N |
7112 | } |
7113 | if (fd < 0) { | |
4af1a041 N |
7114 | struct file *f = mddev->bitmap_info.file; |
7115 | if (f) { | |
7116 | spin_lock(&mddev->lock); | |
7117 | mddev->bitmap_info.file = NULL; | |
7118 | spin_unlock(&mddev->lock); | |
7119 | fput(f); | |
7120 | } | |
36fa3063 N |
7121 | } |
7122 | ||
32a7627c N |
7123 | return err; |
7124 | } | |
7125 | ||
1da177e4 | 7126 | /* |
7e0adbfc | 7127 | * md_set_array_info is used two different ways |
1da177e4 LT |
7128 | * The original usage is when creating a new array. |
7129 | * In this usage, raid_disks is > 0 and it together with | |
7130 | * level, size, not_persistent,layout,chunksize determine the | |
7131 | * shape of the array. | |
7132 | * This will always create an array with a type-0.90.0 superblock. | |
7133 | * The newer usage is when assembling an array. | |
7134 | * In this case raid_disks will be 0, and the major_version field is | |
7135 | * use to determine which style super-blocks are to be found on the devices. | |
7136 | * The minor and patch _version numbers are also kept incase the | |
7137 | * super_block handler wishes to interpret them. | |
7138 | */ | |
7e0adbfc | 7139 | int md_set_array_info(struct mddev *mddev, struct mdu_array_info_s *info) |
1da177e4 | 7140 | { |
1da177e4 LT |
7141 | if (info->raid_disks == 0) { |
7142 | /* just setting version number for superblock loading */ | |
7143 | if (info->major_version < 0 || | |
50511da3 | 7144 | info->major_version >= ARRAY_SIZE(super_types) || |
1da177e4 LT |
7145 | super_types[info->major_version].name == NULL) { |
7146 | /* maybe try to auto-load a module? */ | |
9d48739e | 7147 | pr_warn("md: superblock version %d not known\n", |
1da177e4 LT |
7148 | info->major_version); |
7149 | return -EINVAL; | |
7150 | } | |
7151 | mddev->major_version = info->major_version; | |
7152 | mddev->minor_version = info->minor_version; | |
7153 | mddev->patch_version = info->patch_version; | |
3f9d7b0d | 7154 | mddev->persistent = !info->not_persistent; |
cbd19983 N |
7155 | /* ensure mddev_put doesn't delete this now that there |
7156 | * is some minimal configuration. | |
7157 | */ | |
9ebc6ef1 | 7158 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
7159 | return 0; |
7160 | } | |
7161 | mddev->major_version = MD_MAJOR_VERSION; | |
7162 | mddev->minor_version = MD_MINOR_VERSION; | |
7163 | mddev->patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 7164 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
7165 | |
7166 | mddev->level = info->level; | |
17115e03 | 7167 | mddev->clevel[0] = 0; |
58c0fed4 | 7168 | mddev->dev_sectors = 2 * (sector_t)info->size; |
1da177e4 LT |
7169 | mddev->raid_disks = info->raid_disks; |
7170 | /* don't set md_minor, it is determined by which /dev/md* was | |
7171 | * openned | |
7172 | */ | |
7173 | if (info->state & (1<<MD_SB_CLEAN)) | |
7174 | mddev->recovery_cp = MaxSector; | |
7175 | else | |
7176 | mddev->recovery_cp = 0; | |
7177 | mddev->persistent = ! info->not_persistent; | |
e691063a | 7178 | mddev->external = 0; |
1da177e4 LT |
7179 | |
7180 | mddev->layout = info->layout; | |
33f2c35a N |
7181 | if (mddev->level == 0) |
7182 | /* Cannot trust RAID0 layout info here */ | |
7183 | mddev->layout = -1; | |
9d8f0363 | 7184 | mddev->chunk_sectors = info->chunk_size >> 9; |
1da177e4 | 7185 | |
2953079c | 7186 | if (mddev->persistent) { |
1b3bae49 N |
7187 | mddev->max_disks = MD_SB_DISKS; |
7188 | mddev->flags = 0; | |
7189 | mddev->sb_flags = 0; | |
2953079c SL |
7190 | } |
7191 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
1da177e4 | 7192 | |
c3d9714e | 7193 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 7194 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
c3d9714e | 7195 | mddev->bitmap_info.offset = 0; |
b2a2703c | 7196 | |
f6705578 N |
7197 | mddev->reshape_position = MaxSector; |
7198 | ||
1da177e4 LT |
7199 | /* |
7200 | * Generate a 128 bit UUID | |
7201 | */ | |
7202 | get_random_bytes(mddev->uuid, 16); | |
7203 | ||
f6705578 | 7204 | mddev->new_level = mddev->level; |
664e7c41 | 7205 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
7206 | mddev->new_layout = mddev->layout; |
7207 | mddev->delta_disks = 0; | |
2c810cdd | 7208 | mddev->reshape_backwards = 0; |
f6705578 | 7209 | |
1da177e4 LT |
7210 | return 0; |
7211 | } | |
7212 | ||
fd01b88c | 7213 | void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors) |
1f403624 | 7214 | { |
efa4b77b | 7215 | lockdep_assert_held(&mddev->reconfig_mutex); |
b522adcd DW |
7216 | |
7217 | if (mddev->external_size) | |
7218 | return; | |
7219 | ||
1f403624 DW |
7220 | mddev->array_sectors = array_sectors; |
7221 | } | |
7222 | EXPORT_SYMBOL(md_set_array_sectors); | |
7223 | ||
fd01b88c | 7224 | static int update_size(struct mddev *mddev, sector_t num_sectors) |
a35b0d69 | 7225 | { |
3cb03002 | 7226 | struct md_rdev *rdev; |
a35b0d69 | 7227 | int rv; |
d71f9f88 | 7228 | int fit = (num_sectors == 0); |
818da59f | 7229 | sector_t old_dev_sectors = mddev->dev_sectors; |
ab5a98b1 | 7230 | |
a35b0d69 N |
7231 | if (mddev->pers->resize == NULL) |
7232 | return -EINVAL; | |
d71f9f88 AN |
7233 | /* The "num_sectors" is the number of sectors of each device that |
7234 | * is used. This can only make sense for arrays with redundancy. | |
7235 | * linear and raid0 always use whatever space is available. We can only | |
7236 | * consider changing this number if no resync or reconstruction is | |
7237 | * happening, and if the new size is acceptable. It must fit before the | |
0f420358 | 7238 | * sb_start or, if that is <data_offset, it must fit before the size |
d71f9f88 AN |
7239 | * of each device. If num_sectors is zero, we find the largest size |
7240 | * that fits. | |
a35b0d69 | 7241 | */ |
f851b60d N |
7242 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
7243 | mddev->sync_thread) | |
a35b0d69 | 7244 | return -EBUSY; |
bd8839e0 N |
7245 | if (mddev->ro) |
7246 | return -EROFS; | |
a4a6125a | 7247 | |
dafb20fa | 7248 | rdev_for_each(rdev, mddev) { |
dd8ac336 | 7249 | sector_t avail = rdev->sectors; |
01ab5662 | 7250 | |
d71f9f88 AN |
7251 | if (fit && (num_sectors == 0 || num_sectors > avail)) |
7252 | num_sectors = avail; | |
7253 | if (avail < num_sectors) | |
a35b0d69 N |
7254 | return -ENOSPC; |
7255 | } | |
d71f9f88 | 7256 | rv = mddev->pers->resize(mddev, num_sectors); |
c9483634 | 7257 | if (!rv) { |
818da59f GJ |
7258 | if (mddev_is_clustered(mddev)) |
7259 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
7260 | else if (mddev->queue) { | |
c9483634 | 7261 | set_capacity(mddev->gendisk, mddev->array_sectors); |
659e56ba | 7262 | revalidate_disk_size(mddev->gendisk, true); |
c9483634 GJ |
7263 | } |
7264 | } | |
a35b0d69 N |
7265 | return rv; |
7266 | } | |
7267 | ||
fd01b88c | 7268 | static int update_raid_disks(struct mddev *mddev, int raid_disks) |
da943b99 N |
7269 | { |
7270 | int rv; | |
c6563a8c | 7271 | struct md_rdev *rdev; |
da943b99 | 7272 | /* change the number of raid disks */ |
63c70c4f | 7273 | if (mddev->pers->check_reshape == NULL) |
da943b99 | 7274 | return -EINVAL; |
bd8839e0 N |
7275 | if (mddev->ro) |
7276 | return -EROFS; | |
da943b99 | 7277 | if (raid_disks <= 0 || |
233fca36 | 7278 | (mddev->max_disks && raid_disks >= mddev->max_disks)) |
da943b99 | 7279 | return -EINVAL; |
f851b60d N |
7280 | if (mddev->sync_thread || |
7281 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || | |
7282 | mddev->reshape_position != MaxSector) | |
da943b99 | 7283 | return -EBUSY; |
c6563a8c N |
7284 | |
7285 | rdev_for_each(rdev, mddev) { | |
7286 | if (mddev->raid_disks < raid_disks && | |
7287 | rdev->data_offset < rdev->new_data_offset) | |
7288 | return -EINVAL; | |
7289 | if (mddev->raid_disks > raid_disks && | |
7290 | rdev->data_offset > rdev->new_data_offset) | |
7291 | return -EINVAL; | |
7292 | } | |
7293 | ||
63c70c4f | 7294 | mddev->delta_disks = raid_disks - mddev->raid_disks; |
2c810cdd N |
7295 | if (mddev->delta_disks < 0) |
7296 | mddev->reshape_backwards = 1; | |
7297 | else if (mddev->delta_disks > 0) | |
7298 | mddev->reshape_backwards = 0; | |
63c70c4f N |
7299 | |
7300 | rv = mddev->pers->check_reshape(mddev); | |
2c810cdd | 7301 | if (rv < 0) { |
de171cb9 | 7302 | mddev->delta_disks = 0; |
2c810cdd N |
7303 | mddev->reshape_backwards = 0; |
7304 | } | |
da943b99 N |
7305 | return rv; |
7306 | } | |
7307 | ||
1da177e4 LT |
7308 | /* |
7309 | * update_array_info is used to change the configuration of an | |
7310 | * on-line array. | |
7311 | * The version, ctime,level,size,raid_disks,not_persistent, layout,chunk_size | |
7312 | * fields in the info are checked against the array. | |
7313 | * Any differences that cannot be handled will cause an error. | |
7314 | * Normally, only one change can be managed at a time. | |
7315 | */ | |
fd01b88c | 7316 | static int update_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
7317 | { |
7318 | int rv = 0; | |
7319 | int cnt = 0; | |
36fa3063 N |
7320 | int state = 0; |
7321 | ||
7322 | /* calculate expected state,ignoring low bits */ | |
c3d9714e | 7323 | if (mddev->bitmap && mddev->bitmap_info.offset) |
36fa3063 | 7324 | state |= (1 << MD_SB_BITMAP_PRESENT); |
1da177e4 LT |
7325 | |
7326 | if (mddev->major_version != info->major_version || | |
7327 | mddev->minor_version != info->minor_version || | |
7328 | /* mddev->patch_version != info->patch_version || */ | |
7329 | mddev->ctime != info->ctime || | |
7330 | mddev->level != info->level || | |
7331 | /* mddev->layout != info->layout || */ | |
4e023612 | 7332 | mddev->persistent != !info->not_persistent || |
9d8f0363 | 7333 | mddev->chunk_sectors != info->chunk_size >> 9 || |
36fa3063 N |
7334 | /* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */ |
7335 | ((state^info->state) & 0xfffffe00) | |
7336 | ) | |
1da177e4 LT |
7337 | return -EINVAL; |
7338 | /* Check there is only one change */ | |
58c0fed4 AN |
7339 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
7340 | cnt++; | |
7341 | if (mddev->raid_disks != info->raid_disks) | |
7342 | cnt++; | |
7343 | if (mddev->layout != info->layout) | |
7344 | cnt++; | |
7345 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) | |
7346 | cnt++; | |
7347 | if (cnt == 0) | |
7348 | return 0; | |
7349 | if (cnt > 1) | |
7350 | return -EINVAL; | |
1da177e4 LT |
7351 | |
7352 | if (mddev->layout != info->layout) { | |
7353 | /* Change layout | |
7354 | * we don't need to do anything at the md level, the | |
7355 | * personality will take care of it all. | |
7356 | */ | |
50ac168a | 7357 | if (mddev->pers->check_reshape == NULL) |
1da177e4 | 7358 | return -EINVAL; |
597a711b N |
7359 | else { |
7360 | mddev->new_layout = info->layout; | |
50ac168a | 7361 | rv = mddev->pers->check_reshape(mddev); |
597a711b N |
7362 | if (rv) |
7363 | mddev->new_layout = mddev->layout; | |
7364 | return rv; | |
7365 | } | |
1da177e4 | 7366 | } |
58c0fed4 | 7367 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
d71f9f88 | 7368 | rv = update_size(mddev, (sector_t)info->size * 2); |
a35b0d69 | 7369 | |
da943b99 N |
7370 | if (mddev->raid_disks != info->raid_disks) |
7371 | rv = update_raid_disks(mddev, info->raid_disks); | |
7372 | ||
36fa3063 | 7373 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) { |
293467aa GR |
7374 | if (mddev->pers->quiesce == NULL || mddev->thread == NULL) { |
7375 | rv = -EINVAL; | |
7376 | goto err; | |
7377 | } | |
7378 | if (mddev->recovery || mddev->sync_thread) { | |
7379 | rv = -EBUSY; | |
7380 | goto err; | |
7381 | } | |
36fa3063 | 7382 | if (info->state & (1<<MD_SB_BITMAP_PRESENT)) { |
f9209a32 | 7383 | struct bitmap *bitmap; |
36fa3063 | 7384 | /* add the bitmap */ |
293467aa GR |
7385 | if (mddev->bitmap) { |
7386 | rv = -EEXIST; | |
7387 | goto err; | |
7388 | } | |
7389 | if (mddev->bitmap_info.default_offset == 0) { | |
7390 | rv = -EINVAL; | |
7391 | goto err; | |
7392 | } | |
c3d9714e N |
7393 | mddev->bitmap_info.offset = |
7394 | mddev->bitmap_info.default_offset; | |
6409bb05 N |
7395 | mddev->bitmap_info.space = |
7396 | mddev->bitmap_info.default_space; | |
e64e4018 | 7397 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7398 | mddev_suspend(mddev); |
f9209a32 GR |
7399 | if (!IS_ERR(bitmap)) { |
7400 | mddev->bitmap = bitmap; | |
e64e4018 | 7401 | rv = md_bitmap_load(mddev); |
ba599aca N |
7402 | } else |
7403 | rv = PTR_ERR(bitmap); | |
36fa3063 | 7404 | if (rv) |
e64e4018 | 7405 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7406 | mddev_resume(mddev); |
36fa3063 N |
7407 | } else { |
7408 | /* remove the bitmap */ | |
293467aa GR |
7409 | if (!mddev->bitmap) { |
7410 | rv = -ENOENT; | |
7411 | goto err; | |
7412 | } | |
7413 | if (mddev->bitmap->storage.file) { | |
7414 | rv = -EINVAL; | |
7415 | goto err; | |
7416 | } | |
f6a2dc64 GJ |
7417 | if (mddev->bitmap_info.nodes) { |
7418 | /* hold PW on all the bitmap lock */ | |
7419 | if (md_cluster_ops->lock_all_bitmaps(mddev) <= 0) { | |
9d48739e | 7420 | pr_warn("md: can't change bitmap to none since the array is in use by more than one node\n"); |
f6a2dc64 GJ |
7421 | rv = -EPERM; |
7422 | md_cluster_ops->unlock_all_bitmaps(mddev); | |
7423 | goto err; | |
7424 | } | |
7425 | ||
7426 | mddev->bitmap_info.nodes = 0; | |
7427 | md_cluster_ops->leave(mddev); | |
edee9dfe | 7428 | module_put(md_cluster_mod); |
7c9d5c54 | 7429 | mddev->safemode_delay = DEFAULT_SAFEMODE_DELAY; |
f6a2dc64 | 7430 | } |
9e1cc0a5 | 7431 | mddev_suspend(mddev); |
e64e4018 | 7432 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7433 | mddev_resume(mddev); |
c3d9714e | 7434 | mddev->bitmap_info.offset = 0; |
36fa3063 N |
7435 | } |
7436 | } | |
850b2b42 | 7437 | md_update_sb(mddev, 1); |
293467aa GR |
7438 | return rv; |
7439 | err: | |
1da177e4 LT |
7440 | return rv; |
7441 | } | |
7442 | ||
fd01b88c | 7443 | static int set_disk_faulty(struct mddev *mddev, dev_t dev) |
1da177e4 | 7444 | { |
3cb03002 | 7445 | struct md_rdev *rdev; |
1ca69c4b | 7446 | int err = 0; |
1da177e4 LT |
7447 | |
7448 | if (mddev->pers == NULL) | |
7449 | return -ENODEV; | |
7450 | ||
1ca69c4b | 7451 | rcu_read_lock(); |
1532d9e8 | 7452 | rdev = md_find_rdev_rcu(mddev, dev); |
1da177e4 | 7453 | if (!rdev) |
1ca69c4b N |
7454 | err = -ENODEV; |
7455 | else { | |
7456 | md_error(mddev, rdev); | |
7457 | if (!test_bit(Faulty, &rdev->flags)) | |
7458 | err = -EBUSY; | |
7459 | } | |
7460 | rcu_read_unlock(); | |
7461 | return err; | |
1da177e4 LT |
7462 | } |
7463 | ||
2f9618ce AN |
7464 | /* |
7465 | * We have a problem here : there is no easy way to give a CHS | |
7466 | * virtual geometry. We currently pretend that we have a 2 heads | |
7467 | * 4 sectors (with a BIG number of cylinders...). This drives | |
7468 | * dosfs just mad... ;-) | |
7469 | */ | |
a885c8c4 CH |
7470 | static int md_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
7471 | { | |
fd01b88c | 7472 | struct mddev *mddev = bdev->bd_disk->private_data; |
a885c8c4 CH |
7473 | |
7474 | geo->heads = 2; | |
7475 | geo->sectors = 4; | |
49ce6cea | 7476 | geo->cylinders = mddev->array_sectors / 8; |
a885c8c4 CH |
7477 | return 0; |
7478 | } | |
7479 | ||
cb335f88 NS |
7480 | static inline bool md_ioctl_valid(unsigned int cmd) |
7481 | { | |
7482 | switch (cmd) { | |
7483 | case ADD_NEW_DISK: | |
cb335f88 NS |
7484 | case GET_ARRAY_INFO: |
7485 | case GET_BITMAP_FILE: | |
7486 | case GET_DISK_INFO: | |
7487 | case HOT_ADD_DISK: | |
7488 | case HOT_REMOVE_DISK: | |
cb335f88 NS |
7489 | case RAID_VERSION: |
7490 | case RESTART_ARRAY_RW: | |
7491 | case RUN_ARRAY: | |
7492 | case SET_ARRAY_INFO: | |
7493 | case SET_BITMAP_FILE: | |
7494 | case SET_DISK_FAULTY: | |
7495 | case STOP_ARRAY: | |
7496 | case STOP_ARRAY_RO: | |
1aee41f6 | 7497 | case CLUSTERED_DISK_NACK: |
cb335f88 NS |
7498 | return true; |
7499 | default: | |
7500 | return false; | |
7501 | } | |
7502 | } | |
7503 | ||
a39907fa | 7504 | static int md_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
7505 | unsigned int cmd, unsigned long arg) |
7506 | { | |
7507 | int err = 0; | |
7508 | void __user *argp = (void __user *)arg; | |
fd01b88c | 7509 | struct mddev *mddev = NULL; |
065e519e | 7510 | bool did_set_md_closing = false; |
1da177e4 | 7511 | |
cb335f88 NS |
7512 | if (!md_ioctl_valid(cmd)) |
7513 | return -ENOTTY; | |
7514 | ||
506c9e44 N |
7515 | switch (cmd) { |
7516 | case RAID_VERSION: | |
7517 | case GET_ARRAY_INFO: | |
7518 | case GET_DISK_INFO: | |
7519 | break; | |
7520 | default: | |
7521 | if (!capable(CAP_SYS_ADMIN)) | |
7522 | return -EACCES; | |
7523 | } | |
1da177e4 LT |
7524 | |
7525 | /* | |
7526 | * Commands dealing with the RAID driver but not any | |
7527 | * particular array: | |
7528 | */ | |
c02c0aeb N |
7529 | switch (cmd) { |
7530 | case RAID_VERSION: | |
7531 | err = get_version(argp); | |
3adc28d8 | 7532 | goto out; |
c02c0aeb | 7533 | default:; |
1da177e4 LT |
7534 | } |
7535 | ||
7536 | /* | |
7537 | * Commands creating/starting a new array: | |
7538 | */ | |
7539 | ||
a39907fa | 7540 | mddev = bdev->bd_disk->private_data; |
1da177e4 LT |
7541 | |
7542 | if (!mddev) { | |
7543 | BUG(); | |
3adc28d8 | 7544 | goto out; |
1da177e4 LT |
7545 | } |
7546 | ||
1ca69c4b N |
7547 | /* Some actions do not requires the mutex */ |
7548 | switch (cmd) { | |
7549 | case GET_ARRAY_INFO: | |
7550 | if (!mddev->raid_disks && !mddev->external) | |
7551 | err = -ENODEV; | |
7552 | else | |
7553 | err = get_array_info(mddev, argp); | |
3adc28d8 | 7554 | goto out; |
1ca69c4b N |
7555 | |
7556 | case GET_DISK_INFO: | |
7557 | if (!mddev->raid_disks && !mddev->external) | |
7558 | err = -ENODEV; | |
7559 | else | |
7560 | err = get_disk_info(mddev, argp); | |
3adc28d8 | 7561 | goto out; |
1ca69c4b N |
7562 | |
7563 | case SET_DISK_FAULTY: | |
7564 | err = set_disk_faulty(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7565 | goto out; |
4af1a041 N |
7566 | |
7567 | case GET_BITMAP_FILE: | |
7568 | err = get_bitmap_file(mddev, argp); | |
7569 | goto out; | |
7570 | ||
1ca69c4b N |
7571 | } |
7572 | ||
78b990cf | 7573 | if (cmd == ADD_NEW_DISK || cmd == HOT_ADD_DISK) |
cc1ffe61 | 7574 | flush_rdev_wq(mddev); |
a7a3f08d | 7575 | |
90f5f7ad HR |
7576 | if (cmd == HOT_REMOVE_DISK) |
7577 | /* need to ensure recovery thread has run */ | |
7578 | wait_event_interruptible_timeout(mddev->sb_wait, | |
7579 | !test_bit(MD_RECOVERY_NEEDED, | |
82a301cb | 7580 | &mddev->recovery), |
90f5f7ad | 7581 | msecs_to_jiffies(5000)); |
260fa034 N |
7582 | if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) { |
7583 | /* Need to flush page cache, and ensure no-one else opens | |
7584 | * and writes | |
7585 | */ | |
7586 | mutex_lock(&mddev->open_mutex); | |
9ba3b7f5 | 7587 | if (mddev->pers && atomic_read(&mddev->openers) > 1) { |
260fa034 N |
7588 | mutex_unlock(&mddev->open_mutex); |
7589 | err = -EBUSY; | |
3adc28d8 | 7590 | goto out; |
260fa034 | 7591 | } |
c731b84b DJ |
7592 | if (test_and_set_bit(MD_CLOSING, &mddev->flags)) { |
7593 | mutex_unlock(&mddev->open_mutex); | |
7594 | err = -EBUSY; | |
7595 | goto out; | |
7596 | } | |
065e519e | 7597 | did_set_md_closing = true; |
260fa034 N |
7598 | mutex_unlock(&mddev->open_mutex); |
7599 | sync_blockdev(bdev); | |
7600 | } | |
1da177e4 LT |
7601 | err = mddev_lock(mddev); |
7602 | if (err) { | |
9d48739e N |
7603 | pr_debug("md: ioctl lock interrupted, reason %d, cmd %d\n", |
7604 | err, cmd); | |
3adc28d8 | 7605 | goto out; |
1da177e4 LT |
7606 | } |
7607 | ||
c02c0aeb N |
7608 | if (cmd == SET_ARRAY_INFO) { |
7609 | mdu_array_info_t info; | |
7610 | if (!arg) | |
7611 | memset(&info, 0, sizeof(info)); | |
7612 | else if (copy_from_user(&info, argp, sizeof(info))) { | |
7613 | err = -EFAULT; | |
3adc28d8 | 7614 | goto unlock; |
c02c0aeb N |
7615 | } |
7616 | if (mddev->pers) { | |
7617 | err = update_array_info(mddev, &info); | |
7618 | if (err) { | |
9d48739e | 7619 | pr_warn("md: couldn't update array info. %d\n", err); |
3adc28d8 | 7620 | goto unlock; |
1da177e4 | 7621 | } |
3adc28d8 | 7622 | goto unlock; |
c02c0aeb N |
7623 | } |
7624 | if (!list_empty(&mddev->disks)) { | |
9d48739e | 7625 | pr_warn("md: array %s already has disks!\n", mdname(mddev)); |
c02c0aeb | 7626 | err = -EBUSY; |
3adc28d8 | 7627 | goto unlock; |
c02c0aeb N |
7628 | } |
7629 | if (mddev->raid_disks) { | |
9d48739e | 7630 | pr_warn("md: array %s already initialised!\n", mdname(mddev)); |
c02c0aeb | 7631 | err = -EBUSY; |
3adc28d8 | 7632 | goto unlock; |
c02c0aeb | 7633 | } |
7e0adbfc | 7634 | err = md_set_array_info(mddev, &info); |
c02c0aeb | 7635 | if (err) { |
9d48739e | 7636 | pr_warn("md: couldn't set array info. %d\n", err); |
3adc28d8 | 7637 | goto unlock; |
c02c0aeb | 7638 | } |
3adc28d8 | 7639 | goto unlock; |
1da177e4 LT |
7640 | } |
7641 | ||
7642 | /* | |
7643 | * Commands querying/configuring an existing array: | |
7644 | */ | |
32a7627c | 7645 | /* if we are not initialised yet, only ADD_NEW_DISK, STOP_ARRAY, |
3f9d7b0d | 7646 | * RUN_ARRAY, and GET_ and SET_BITMAP_FILE are allowed */ |
a17184a9 N |
7647 | if ((!mddev->raid_disks && !mddev->external) |
7648 | && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY | |
7649 | && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE | |
7650 | && cmd != GET_BITMAP_FILE) { | |
1da177e4 | 7651 | err = -ENODEV; |
3adc28d8 | 7652 | goto unlock; |
1da177e4 LT |
7653 | } |
7654 | ||
7655 | /* | |
7656 | * Commands even a read-only array can execute: | |
7657 | */ | |
c02c0aeb | 7658 | switch (cmd) { |
c02c0aeb N |
7659 | case RESTART_ARRAY_RW: |
7660 | err = restart_array(mddev); | |
3adc28d8 | 7661 | goto unlock; |
1da177e4 | 7662 | |
c02c0aeb N |
7663 | case STOP_ARRAY: |
7664 | err = do_md_stop(mddev, 0, bdev); | |
3adc28d8 | 7665 | goto unlock; |
1da177e4 | 7666 | |
c02c0aeb N |
7667 | case STOP_ARRAY_RO: |
7668 | err = md_set_readonly(mddev, bdev); | |
3adc28d8 | 7669 | goto unlock; |
1da177e4 | 7670 | |
3ea8929d N |
7671 | case HOT_REMOVE_DISK: |
7672 | err = hot_remove_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7673 | goto unlock; |
3ea8929d | 7674 | |
7ceb17e8 N |
7675 | case ADD_NEW_DISK: |
7676 | /* We can support ADD_NEW_DISK on read-only arrays | |
466ad292 | 7677 | * only if we are re-adding a preexisting device. |
7ceb17e8 N |
7678 | * So require mddev->pers and MD_DISK_SYNC. |
7679 | */ | |
7680 | if (mddev->pers) { | |
7681 | mdu_disk_info_t info; | |
7682 | if (copy_from_user(&info, argp, sizeof(info))) | |
7683 | err = -EFAULT; | |
7684 | else if (!(info.state & (1<<MD_DISK_SYNC))) | |
7685 | /* Need to clear read-only for this */ | |
7686 | break; | |
7687 | else | |
7e0adbfc | 7688 | err = md_add_new_disk(mddev, &info); |
3adc28d8 | 7689 | goto unlock; |
7ceb17e8 N |
7690 | } |
7691 | break; | |
1da177e4 LT |
7692 | } |
7693 | ||
7694 | /* | |
7695 | * The remaining ioctls are changing the state of the | |
f91de92e | 7696 | * superblock, so we do not allow them on read-only arrays. |
1da177e4 | 7697 | */ |
326eb17d | 7698 | if (mddev->ro && mddev->pers) { |
f91de92e N |
7699 | if (mddev->ro == 2) { |
7700 | mddev->ro = 0; | |
00bcb4ac | 7701 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 7702 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f3378b48 N |
7703 | /* mddev_unlock will wake thread */ |
7704 | /* If a device failed while we were read-only, we | |
7705 | * need to make sure the metadata is updated now. | |
7706 | */ | |
2953079c | 7707 | if (test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) { |
f3378b48 N |
7708 | mddev_unlock(mddev); |
7709 | wait_event(mddev->sb_wait, | |
2953079c SL |
7710 | !test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags) && |
7711 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); | |
29f097c4 | 7712 | mddev_lock_nointr(mddev); |
f3378b48 | 7713 | } |
f91de92e N |
7714 | } else { |
7715 | err = -EROFS; | |
3adc28d8 | 7716 | goto unlock; |
f91de92e | 7717 | } |
1da177e4 LT |
7718 | } |
7719 | ||
c02c0aeb N |
7720 | switch (cmd) { |
7721 | case ADD_NEW_DISK: | |
1da177e4 | 7722 | { |
c02c0aeb N |
7723 | mdu_disk_info_t info; |
7724 | if (copy_from_user(&info, argp, sizeof(info))) | |
7725 | err = -EFAULT; | |
7726 | else | |
7e0adbfc | 7727 | err = md_add_new_disk(mddev, &info); |
3adc28d8 | 7728 | goto unlock; |
c02c0aeb | 7729 | } |
1da177e4 | 7730 | |
1aee41f6 GR |
7731 | case CLUSTERED_DISK_NACK: |
7732 | if (mddev_is_clustered(mddev)) | |
7733 | md_cluster_ops->new_disk_ack(mddev, false); | |
7734 | else | |
7735 | err = -EINVAL; | |
7736 | goto unlock; | |
7737 | ||
c02c0aeb N |
7738 | case HOT_ADD_DISK: |
7739 | err = hot_add_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7740 | goto unlock; |
1da177e4 | 7741 | |
c02c0aeb N |
7742 | case RUN_ARRAY: |
7743 | err = do_md_run(mddev); | |
3adc28d8 | 7744 | goto unlock; |
1da177e4 | 7745 | |
c02c0aeb N |
7746 | case SET_BITMAP_FILE: |
7747 | err = set_bitmap_file(mddev, (int)arg); | |
3adc28d8 | 7748 | goto unlock; |
32a7627c | 7749 | |
c02c0aeb N |
7750 | default: |
7751 | err = -EINVAL; | |
3adc28d8 | 7752 | goto unlock; |
1da177e4 LT |
7753 | } |
7754 | ||
3adc28d8 | 7755 | unlock: |
d3374825 N |
7756 | if (mddev->hold_active == UNTIL_IOCTL && |
7757 | err != -EINVAL) | |
7758 | mddev->hold_active = 0; | |
1da177e4 | 7759 | mddev_unlock(mddev); |
3adc28d8 | 7760 | out: |
065e519e N |
7761 | if(did_set_md_closing) |
7762 | clear_bit(MD_CLOSING, &mddev->flags); | |
1da177e4 LT |
7763 | return err; |
7764 | } | |
aa98aa31 AB |
7765 | #ifdef CONFIG_COMPAT |
7766 | static int md_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
7767 | unsigned int cmd, unsigned long arg) | |
7768 | { | |
7769 | switch (cmd) { | |
7770 | case HOT_REMOVE_DISK: | |
7771 | case HOT_ADD_DISK: | |
7772 | case SET_DISK_FAULTY: | |
7773 | case SET_BITMAP_FILE: | |
7774 | /* These take in integer arg, do not convert */ | |
7775 | break; | |
7776 | default: | |
7777 | arg = (unsigned long)compat_ptr(arg); | |
7778 | break; | |
7779 | } | |
7780 | ||
7781 | return md_ioctl(bdev, mode, cmd, arg); | |
7782 | } | |
7783 | #endif /* CONFIG_COMPAT */ | |
1da177e4 | 7784 | |
118cf084 CH |
7785 | static int md_set_read_only(struct block_device *bdev, bool ro) |
7786 | { | |
7787 | struct mddev *mddev = bdev->bd_disk->private_data; | |
7788 | int err; | |
7789 | ||
7790 | err = mddev_lock(mddev); | |
7791 | if (err) | |
7792 | return err; | |
7793 | ||
7794 | if (!mddev->raid_disks && !mddev->external) { | |
7795 | err = -ENODEV; | |
7796 | goto out_unlock; | |
7797 | } | |
7798 | ||
7799 | /* | |
7800 | * Transitioning to read-auto need only happen for arrays that call | |
7801 | * md_write_start and which are not ready for writes yet. | |
7802 | */ | |
7803 | if (!ro && mddev->ro == 1 && mddev->pers) { | |
7804 | err = restart_array(mddev); | |
7805 | if (err) | |
7806 | goto out_unlock; | |
7807 | mddev->ro = 2; | |
7808 | } | |
7809 | ||
7810 | out_unlock: | |
7811 | mddev_unlock(mddev); | |
7812 | return err; | |
7813 | } | |
7814 | ||
a39907fa | 7815 | static int md_open(struct block_device *bdev, fmode_t mode) |
1da177e4 LT |
7816 | { |
7817 | /* | |
7818 | * Succeed if we can lock the mddev, which confirms that | |
7819 | * it isn't being stopped right now. | |
7820 | */ | |
fd01b88c | 7821 | struct mddev *mddev = mddev_find(bdev->bd_dev); |
1da177e4 LT |
7822 | int err; |
7823 | ||
0c098220 YL |
7824 | if (!mddev) |
7825 | return -ENODEV; | |
7826 | ||
d3374825 N |
7827 | if (mddev->gendisk != bdev->bd_disk) { |
7828 | /* we are racing with mddev_put which is discarding this | |
7829 | * bd_disk. | |
7830 | */ | |
7831 | mddev_put(mddev); | |
7832 | /* Wait until bdev->bd_disk is definitely gone */ | |
f6766ff6 GJ |
7833 | if (work_pending(&mddev->del_work)) |
7834 | flush_workqueue(md_misc_wq); | |
d3374825 N |
7835 | /* Then retry the open from the top */ |
7836 | return -ERESTARTSYS; | |
7837 | } | |
7838 | BUG_ON(mddev != bdev->bd_disk->private_data); | |
7839 | ||
c8c00a69 | 7840 | if ((err = mutex_lock_interruptible(&mddev->open_mutex))) |
1da177e4 LT |
7841 | goto out; |
7842 | ||
af8d8e6f GJ |
7843 | if (test_bit(MD_CLOSING, &mddev->flags)) { |
7844 | mutex_unlock(&mddev->open_mutex); | |
e2342ca8 N |
7845 | err = -ENODEV; |
7846 | goto out; | |
af8d8e6f GJ |
7847 | } |
7848 | ||
1da177e4 | 7849 | err = 0; |
f2ea68cf | 7850 | atomic_inc(&mddev->openers); |
c8c00a69 | 7851 | mutex_unlock(&mddev->open_mutex); |
1da177e4 | 7852 | |
818077d6 | 7853 | bdev_check_media_change(bdev); |
1da177e4 | 7854 | out: |
e2342ca8 N |
7855 | if (err) |
7856 | mddev_put(mddev); | |
1da177e4 LT |
7857 | return err; |
7858 | } | |
7859 | ||
db2a144b | 7860 | static void md_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 7861 | { |
f72ffdd6 | 7862 | struct mddev *mddev = disk->private_data; |
1da177e4 | 7863 | |
52e5f9d1 | 7864 | BUG_ON(!mddev); |
f2ea68cf | 7865 | atomic_dec(&mddev->openers); |
1da177e4 | 7866 | mddev_put(mddev); |
1da177e4 | 7867 | } |
f0b4f7e2 | 7868 | |
a564e23f | 7869 | static unsigned int md_check_events(struct gendisk *disk, unsigned int clearing) |
f0b4f7e2 | 7870 | { |
fd01b88c | 7871 | struct mddev *mddev = disk->private_data; |
a564e23f | 7872 | unsigned int ret = 0; |
f0b4f7e2 | 7873 | |
a564e23f CH |
7874 | if (mddev->changed) |
7875 | ret = DISK_EVENT_MEDIA_CHANGE; | |
f0b4f7e2 | 7876 | mddev->changed = 0; |
a564e23f | 7877 | return ret; |
f0b4f7e2 | 7878 | } |
a564e23f | 7879 | |
7e0adbfc | 7880 | const struct block_device_operations md_fops = |
1da177e4 LT |
7881 | { |
7882 | .owner = THIS_MODULE, | |
c62b37d9 | 7883 | .submit_bio = md_submit_bio, |
a39907fa AV |
7884 | .open = md_open, |
7885 | .release = md_release, | |
b492b852 | 7886 | .ioctl = md_ioctl, |
aa98aa31 AB |
7887 | #ifdef CONFIG_COMPAT |
7888 | .compat_ioctl = md_compat_ioctl, | |
7889 | #endif | |
a885c8c4 | 7890 | .getgeo = md_getgeo, |
a564e23f | 7891 | .check_events = md_check_events, |
118cf084 | 7892 | .set_read_only = md_set_read_only, |
1da177e4 LT |
7893 | }; |
7894 | ||
f72ffdd6 | 7895 | static int md_thread(void *arg) |
1da177e4 | 7896 | { |
2b8bf345 | 7897 | struct md_thread *thread = arg; |
1da177e4 | 7898 | |
1da177e4 LT |
7899 | /* |
7900 | * md_thread is a 'system-thread', it's priority should be very | |
7901 | * high. We avoid resource deadlocks individually in each | |
7902 | * raid personality. (RAID5 does preallocation) We also use RR and | |
7903 | * the very same RT priority as kswapd, thus we will never get | |
7904 | * into a priority inversion deadlock. | |
7905 | * | |
7906 | * we definitely have to have equal or higher priority than | |
7907 | * bdflush, otherwise bdflush will deadlock if there are too | |
7908 | * many dirty RAID5 blocks. | |
7909 | */ | |
1da177e4 | 7910 | |
6985c43f | 7911 | allow_signal(SIGKILL); |
a6fb0934 | 7912 | while (!kthread_should_stop()) { |
1da177e4 | 7913 | |
93588e22 N |
7914 | /* We need to wait INTERRUPTIBLE so that |
7915 | * we don't add to the load-average. | |
7916 | * That means we need to be sure no signals are | |
7917 | * pending | |
7918 | */ | |
7919 | if (signal_pending(current)) | |
7920 | flush_signals(current); | |
7921 | ||
7922 | wait_event_interruptible_timeout | |
7923 | (thread->wqueue, | |
7924 | test_bit(THREAD_WAKEUP, &thread->flags) | |
ce1ccd07 | 7925 | || kthread_should_stop() || kthread_should_park(), |
93588e22 | 7926 | thread->timeout); |
1da177e4 | 7927 | |
6c987910 | 7928 | clear_bit(THREAD_WAKEUP, &thread->flags); |
ce1ccd07 SL |
7929 | if (kthread_should_park()) |
7930 | kthread_parkme(); | |
6c987910 | 7931 | if (!kthread_should_stop()) |
4ed8731d | 7932 | thread->run(thread); |
1da177e4 | 7933 | } |
a6fb0934 | 7934 | |
1da177e4 LT |
7935 | return 0; |
7936 | } | |
7937 | ||
2b8bf345 | 7938 | void md_wakeup_thread(struct md_thread *thread) |
1da177e4 LT |
7939 | { |
7940 | if (thread) { | |
36a4e1fe | 7941 | pr_debug("md: waking up MD thread %s.\n", thread->tsk->comm); |
d1d90147 GJ |
7942 | set_bit(THREAD_WAKEUP, &thread->flags); |
7943 | wake_up(&thread->wqueue); | |
1da177e4 LT |
7944 | } |
7945 | } | |
6c144d31 | 7946 | EXPORT_SYMBOL(md_wakeup_thread); |
1da177e4 | 7947 | |
4ed8731d SL |
7948 | struct md_thread *md_register_thread(void (*run) (struct md_thread *), |
7949 | struct mddev *mddev, const char *name) | |
1da177e4 | 7950 | { |
2b8bf345 | 7951 | struct md_thread *thread; |
1da177e4 | 7952 | |
2b8bf345 | 7953 | thread = kzalloc(sizeof(struct md_thread), GFP_KERNEL); |
1da177e4 LT |
7954 | if (!thread) |
7955 | return NULL; | |
7956 | ||
1da177e4 LT |
7957 | init_waitqueue_head(&thread->wqueue); |
7958 | ||
1da177e4 LT |
7959 | thread->run = run; |
7960 | thread->mddev = mddev; | |
32a7627c | 7961 | thread->timeout = MAX_SCHEDULE_TIMEOUT; |
0da3c619 N |
7962 | thread->tsk = kthread_run(md_thread, thread, |
7963 | "%s_%s", | |
7964 | mdname(thread->mddev), | |
0232605d | 7965 | name); |
a6fb0934 | 7966 | if (IS_ERR(thread->tsk)) { |
1da177e4 LT |
7967 | kfree(thread); |
7968 | return NULL; | |
7969 | } | |
1da177e4 LT |
7970 | return thread; |
7971 | } | |
6c144d31 | 7972 | EXPORT_SYMBOL(md_register_thread); |
1da177e4 | 7973 | |
2b8bf345 | 7974 | void md_unregister_thread(struct md_thread **threadp) |
1da177e4 | 7975 | { |
2b8bf345 | 7976 | struct md_thread *thread = *threadp; |
e0cf8f04 N |
7977 | if (!thread) |
7978 | return; | |
36a4e1fe | 7979 | pr_debug("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk)); |
01f96c0a N |
7980 | /* Locking ensures that mddev_unlock does not wake_up a |
7981 | * non-existent thread | |
7982 | */ | |
7983 | spin_lock(&pers_lock); | |
7984 | *threadp = NULL; | |
7985 | spin_unlock(&pers_lock); | |
a6fb0934 N |
7986 | |
7987 | kthread_stop(thread->tsk); | |
1da177e4 LT |
7988 | kfree(thread); |
7989 | } | |
6c144d31 | 7990 | EXPORT_SYMBOL(md_unregister_thread); |
1da177e4 | 7991 | |
fd01b88c | 7992 | void md_error(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 7993 | { |
b2d444d7 | 7994 | if (!rdev || test_bit(Faulty, &rdev->flags)) |
1da177e4 | 7995 | return; |
6bfe0b49 | 7996 | |
de393cde | 7997 | if (!mddev->pers || !mddev->pers->error_handler) |
1da177e4 LT |
7998 | return; |
7999 | mddev->pers->error_handler(mddev,rdev); | |
72a23c21 NB |
8000 | if (mddev->degraded) |
8001 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
00bcb4ac | 8002 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
8003 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8004 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8005 | md_wakeup_thread(mddev->thread); | |
768a418d | 8006 | if (mddev->event_work.func) |
e804ac78 | 8007 | queue_work(md_misc_wq, &mddev->event_work); |
bb9ef716 | 8008 | md_new_event(mddev); |
1da177e4 | 8009 | } |
6c144d31 | 8010 | EXPORT_SYMBOL(md_error); |
1da177e4 LT |
8011 | |
8012 | /* seq_file implementation /proc/mdstat */ | |
8013 | ||
8014 | static void status_unused(struct seq_file *seq) | |
8015 | { | |
8016 | int i = 0; | |
3cb03002 | 8017 | struct md_rdev *rdev; |
1da177e4 LT |
8018 | |
8019 | seq_printf(seq, "unused devices: "); | |
8020 | ||
159ec1fc | 8021 | list_for_each_entry(rdev, &pending_raid_disks, same_set) { |
1da177e4 LT |
8022 | char b[BDEVNAME_SIZE]; |
8023 | i++; | |
8024 | seq_printf(seq, "%s ", | |
8025 | bdevname(rdev->bdev,b)); | |
8026 | } | |
8027 | if (!i) | |
8028 | seq_printf(seq, "<none>"); | |
8029 | ||
8030 | seq_printf(seq, "\n"); | |
8031 | } | |
8032 | ||
f7851be7 | 8033 | static int status_resync(struct seq_file *seq, struct mddev *mddev) |
1da177e4 | 8034 | { |
dd71cf6b | 8035 | sector_t max_sectors, resync, res; |
9642fa73 MT |
8036 | unsigned long dt, db = 0; |
8037 | sector_t rt, curr_mark_cnt, resync_mark_cnt; | |
8038 | int scale, recovery_active; | |
4588b42e | 8039 | unsigned int per_milli; |
1da177e4 | 8040 | |
c804cdec N |
8041 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8042 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
dd71cf6b | 8043 | max_sectors = mddev->resync_max_sectors; |
1da177e4 | 8044 | else |
dd71cf6b | 8045 | max_sectors = mddev->dev_sectors; |
1da177e4 | 8046 | |
f7851be7 N |
8047 | resync = mddev->curr_resync; |
8048 | if (resync <= 3) { | |
8049 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) | |
8050 | /* Still cleaning up */ | |
8051 | resync = max_sectors; | |
d2e2ec82 ND |
8052 | } else if (resync > max_sectors) |
8053 | resync = max_sectors; | |
8054 | else | |
f7851be7 N |
8055 | resync -= atomic_read(&mddev->recovery_active); |
8056 | ||
8057 | if (resync == 0) { | |
0357ba27 GJ |
8058 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery)) { |
8059 | struct md_rdev *rdev; | |
8060 | ||
8061 | rdev_for_each(rdev, mddev) | |
8062 | if (rdev->raid_disk >= 0 && | |
8063 | !test_bit(Faulty, &rdev->flags) && | |
8064 | rdev->recovery_offset != MaxSector && | |
8065 | rdev->recovery_offset) { | |
8066 | seq_printf(seq, "\trecover=REMOTE"); | |
8067 | return 1; | |
8068 | } | |
8069 | if (mddev->reshape_position != MaxSector) | |
8070 | seq_printf(seq, "\treshape=REMOTE"); | |
8071 | else | |
8072 | seq_printf(seq, "\tresync=REMOTE"); | |
8073 | return 1; | |
8074 | } | |
f7851be7 N |
8075 | if (mddev->recovery_cp < MaxSector) { |
8076 | seq_printf(seq, "\tresync=PENDING"); | |
8077 | return 1; | |
8078 | } | |
8079 | return 0; | |
8080 | } | |
8081 | if (resync < 3) { | |
8082 | seq_printf(seq, "\tresync=DELAYED"); | |
8083 | return 1; | |
8084 | } | |
8085 | ||
403df478 | 8086 | WARN_ON(max_sectors == 0); |
4588b42e | 8087 | /* Pick 'scale' such that (resync>>scale)*1000 will fit |
dd71cf6b | 8088 | * in a sector_t, and (max_sectors>>scale) will fit in a |
4588b42e N |
8089 | * u32, as those are the requirements for sector_div. |
8090 | * Thus 'scale' must be at least 10 | |
8091 | */ | |
8092 | scale = 10; | |
8093 | if (sizeof(sector_t) > sizeof(unsigned long)) { | |
dd71cf6b | 8094 | while ( max_sectors/2 > (1ULL<<(scale+32))) |
4588b42e N |
8095 | scale++; |
8096 | } | |
8097 | res = (resync>>scale)*1000; | |
dd71cf6b | 8098 | sector_div(res, (u32)((max_sectors>>scale)+1)); |
4588b42e N |
8099 | |
8100 | per_milli = res; | |
1da177e4 | 8101 | { |
4588b42e | 8102 | int i, x = per_milli/50, y = 20-x; |
1da177e4 LT |
8103 | seq_printf(seq, "["); |
8104 | for (i = 0; i < x; i++) | |
8105 | seq_printf(seq, "="); | |
8106 | seq_printf(seq, ">"); | |
8107 | for (i = 0; i < y; i++) | |
8108 | seq_printf(seq, "."); | |
8109 | seq_printf(seq, "] "); | |
8110 | } | |
4588b42e | 8111 | seq_printf(seq, " %s =%3u.%u%% (%llu/%llu)", |
ccfcc3c1 N |
8112 | (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)? |
8113 | "reshape" : | |
61df9d91 N |
8114 | (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)? |
8115 | "check" : | |
8116 | (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? | |
8117 | "resync" : "recovery"))), | |
8118 | per_milli/10, per_milli % 10, | |
dd71cf6b N |
8119 | (unsigned long long) resync/2, |
8120 | (unsigned long long) max_sectors/2); | |
1da177e4 LT |
8121 | |
8122 | /* | |
1da177e4 LT |
8123 | * dt: time from mark until now |
8124 | * db: blocks written from mark until now | |
8125 | * rt: remaining time | |
dd71cf6b | 8126 | * |
9642fa73 MT |
8127 | * rt is a sector_t, which is always 64bit now. We are keeping |
8128 | * the original algorithm, but it is not really necessary. | |
8129 | * | |
8130 | * Original algorithm: | |
8131 | * So we divide before multiply in case it is 32bit and close | |
8132 | * to the limit. | |
8133 | * We scale the divisor (db) by 32 to avoid losing precision | |
8134 | * near the end of resync when the number of remaining sectors | |
8135 | * is close to 'db'. | |
8136 | * We then divide rt by 32 after multiplying by db to compensate. | |
8137 | * The '+1' avoids division by zero if db is very small. | |
1da177e4 LT |
8138 | */ |
8139 | dt = ((jiffies - mddev->resync_mark) / HZ); | |
8140 | if (!dt) dt++; | |
9642fa73 MT |
8141 | |
8142 | curr_mark_cnt = mddev->curr_mark_cnt; | |
8143 | recovery_active = atomic_read(&mddev->recovery_active); | |
8144 | resync_mark_cnt = mddev->resync_mark_cnt; | |
8145 | ||
8146 | if (curr_mark_cnt >= (recovery_active + resync_mark_cnt)) | |
8147 | db = curr_mark_cnt - (recovery_active + resync_mark_cnt); | |
1da177e4 | 8148 | |
dd71cf6b | 8149 | rt = max_sectors - resync; /* number of remaining sectors */ |
9642fa73 | 8150 | rt = div64_u64(rt, db/32+1); |
dd71cf6b N |
8151 | rt *= dt; |
8152 | rt >>= 5; | |
8153 | ||
8154 | seq_printf(seq, " finish=%lu.%lumin", (unsigned long)rt / 60, | |
8155 | ((unsigned long)rt % 60)/6); | |
1da177e4 | 8156 | |
ff4e8d9a | 8157 | seq_printf(seq, " speed=%ldK/sec", db/2/dt); |
f7851be7 | 8158 | return 1; |
1da177e4 LT |
8159 | } |
8160 | ||
8161 | static void *md_seq_start(struct seq_file *seq, loff_t *pos) | |
8162 | { | |
8163 | struct list_head *tmp; | |
8164 | loff_t l = *pos; | |
fd01b88c | 8165 | struct mddev *mddev; |
1da177e4 LT |
8166 | |
8167 | if (l >= 0x10000) | |
8168 | return NULL; | |
8169 | if (!l--) | |
8170 | /* header */ | |
8171 | return (void*)1; | |
8172 | ||
8173 | spin_lock(&all_mddevs_lock); | |
8174 | list_for_each(tmp,&all_mddevs) | |
8175 | if (!l--) { | |
fd01b88c | 8176 | mddev = list_entry(tmp, struct mddev, all_mddevs); |
1da177e4 LT |
8177 | mddev_get(mddev); |
8178 | spin_unlock(&all_mddevs_lock); | |
8179 | return mddev; | |
8180 | } | |
8181 | spin_unlock(&all_mddevs_lock); | |
8182 | if (!l--) | |
8183 | return (void*)2;/* tail */ | |
8184 | return NULL; | |
8185 | } | |
8186 | ||
8187 | static void *md_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
8188 | { | |
8189 | struct list_head *tmp; | |
fd01b88c | 8190 | struct mddev *next_mddev, *mddev = v; |
f72ffdd6 | 8191 | |
1da177e4 LT |
8192 | ++*pos; |
8193 | if (v == (void*)2) | |
8194 | return NULL; | |
8195 | ||
8196 | spin_lock(&all_mddevs_lock); | |
8197 | if (v == (void*)1) | |
8198 | tmp = all_mddevs.next; | |
8199 | else | |
8200 | tmp = mddev->all_mddevs.next; | |
8201 | if (tmp != &all_mddevs) | |
fd01b88c | 8202 | next_mddev = mddev_get(list_entry(tmp,struct mddev,all_mddevs)); |
1da177e4 LT |
8203 | else { |
8204 | next_mddev = (void*)2; | |
8205 | *pos = 0x10000; | |
f72ffdd6 | 8206 | } |
1da177e4 LT |
8207 | spin_unlock(&all_mddevs_lock); |
8208 | ||
8209 | if (v != (void*)1) | |
8210 | mddev_put(mddev); | |
8211 | return next_mddev; | |
8212 | ||
8213 | } | |
8214 | ||
8215 | static void md_seq_stop(struct seq_file *seq, void *v) | |
8216 | { | |
fd01b88c | 8217 | struct mddev *mddev = v; |
1da177e4 LT |
8218 | |
8219 | if (mddev && v != (void*)1 && v != (void*)2) | |
8220 | mddev_put(mddev); | |
8221 | } | |
8222 | ||
8223 | static int md_seq_show(struct seq_file *seq, void *v) | |
8224 | { | |
fd01b88c | 8225 | struct mddev *mddev = v; |
dd8ac336 | 8226 | sector_t sectors; |
3cb03002 | 8227 | struct md_rdev *rdev; |
1da177e4 LT |
8228 | |
8229 | if (v == (void*)1) { | |
84fc4b56 | 8230 | struct md_personality *pers; |
1da177e4 LT |
8231 | seq_printf(seq, "Personalities : "); |
8232 | spin_lock(&pers_lock); | |
2604b703 N |
8233 | list_for_each_entry(pers, &pers_list, list) |
8234 | seq_printf(seq, "[%s] ", pers->name); | |
1da177e4 LT |
8235 | |
8236 | spin_unlock(&pers_lock); | |
8237 | seq_printf(seq, "\n"); | |
f1514638 | 8238 | seq->poll_event = atomic_read(&md_event_count); |
1da177e4 LT |
8239 | return 0; |
8240 | } | |
8241 | if (v == (void*)2) { | |
8242 | status_unused(seq); | |
8243 | return 0; | |
8244 | } | |
8245 | ||
36d091f4 | 8246 | spin_lock(&mddev->lock); |
1da177e4 LT |
8247 | if (mddev->pers || mddev->raid_disks || !list_empty(&mddev->disks)) { |
8248 | seq_printf(seq, "%s : %sactive", mdname(mddev), | |
8249 | mddev->pers ? "" : "in"); | |
8250 | if (mddev->pers) { | |
f91de92e | 8251 | if (mddev->ro==1) |
1da177e4 | 8252 | seq_printf(seq, " (read-only)"); |
f91de92e | 8253 | if (mddev->ro==2) |
52720ae7 | 8254 | seq_printf(seq, " (auto-read-only)"); |
1da177e4 LT |
8255 | seq_printf(seq, " %s", mddev->pers->name); |
8256 | } | |
8257 | ||
dd8ac336 | 8258 | sectors = 0; |
f97fcad3 N |
8259 | rcu_read_lock(); |
8260 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 LT |
8261 | char b[BDEVNAME_SIZE]; |
8262 | seq_printf(seq, " %s[%d]", | |
8263 | bdevname(rdev->bdev,b), rdev->desc_nr); | |
8ddf9efe N |
8264 | if (test_bit(WriteMostly, &rdev->flags)) |
8265 | seq_printf(seq, "(W)"); | |
9efdca16 SL |
8266 | if (test_bit(Journal, &rdev->flags)) |
8267 | seq_printf(seq, "(J)"); | |
b2d444d7 | 8268 | if (test_bit(Faulty, &rdev->flags)) { |
1da177e4 LT |
8269 | seq_printf(seq, "(F)"); |
8270 | continue; | |
2d78f8c4 N |
8271 | } |
8272 | if (rdev->raid_disk < 0) | |
b325a32e | 8273 | seq_printf(seq, "(S)"); /* spare */ |
2d78f8c4 N |
8274 | if (test_bit(Replacement, &rdev->flags)) |
8275 | seq_printf(seq, "(R)"); | |
dd8ac336 | 8276 | sectors += rdev->sectors; |
1da177e4 | 8277 | } |
f97fcad3 | 8278 | rcu_read_unlock(); |
1da177e4 LT |
8279 | |
8280 | if (!list_empty(&mddev->disks)) { | |
8281 | if (mddev->pers) | |
8282 | seq_printf(seq, "\n %llu blocks", | |
f233ea5c AN |
8283 | (unsigned long long) |
8284 | mddev->array_sectors / 2); | |
1da177e4 LT |
8285 | else |
8286 | seq_printf(seq, "\n %llu blocks", | |
dd8ac336 | 8287 | (unsigned long long)sectors / 2); |
1da177e4 | 8288 | } |
1cd6bf19 N |
8289 | if (mddev->persistent) { |
8290 | if (mddev->major_version != 0 || | |
8291 | mddev->minor_version != 90) { | |
8292 | seq_printf(seq," super %d.%d", | |
8293 | mddev->major_version, | |
8294 | mddev->minor_version); | |
8295 | } | |
e691063a N |
8296 | } else if (mddev->external) |
8297 | seq_printf(seq, " super external:%s", | |
8298 | mddev->metadata_type); | |
8299 | else | |
1cd6bf19 | 8300 | seq_printf(seq, " super non-persistent"); |
1da177e4 LT |
8301 | |
8302 | if (mddev->pers) { | |
d710e138 | 8303 | mddev->pers->status(seq, mddev); |
f72ffdd6 | 8304 | seq_printf(seq, "\n "); |
8e1b39d6 | 8305 | if (mddev->pers->sync_request) { |
f7851be7 | 8306 | if (status_resync(seq, mddev)) |
8e1b39d6 | 8307 | seq_printf(seq, "\n "); |
8e1b39d6 | 8308 | } |
32a7627c N |
8309 | } else |
8310 | seq_printf(seq, "\n "); | |
8311 | ||
e64e4018 | 8312 | md_bitmap_status(seq, mddev->bitmap); |
1da177e4 LT |
8313 | |
8314 | seq_printf(seq, "\n"); | |
8315 | } | |
36d091f4 | 8316 | spin_unlock(&mddev->lock); |
f72ffdd6 | 8317 | |
1da177e4 LT |
8318 | return 0; |
8319 | } | |
8320 | ||
110518bc | 8321 | static const struct seq_operations md_seq_ops = { |
1da177e4 LT |
8322 | .start = md_seq_start, |
8323 | .next = md_seq_next, | |
8324 | .stop = md_seq_stop, | |
8325 | .show = md_seq_show, | |
8326 | }; | |
8327 | ||
8328 | static int md_seq_open(struct inode *inode, struct file *file) | |
8329 | { | |
f1514638 | 8330 | struct seq_file *seq; |
1da177e4 LT |
8331 | int error; |
8332 | ||
8333 | error = seq_open(file, &md_seq_ops); | |
d7603b7e | 8334 | if (error) |
f1514638 KS |
8335 | return error; |
8336 | ||
8337 | seq = file->private_data; | |
8338 | seq->poll_event = atomic_read(&md_event_count); | |
1da177e4 LT |
8339 | return error; |
8340 | } | |
8341 | ||
e2f23b60 | 8342 | static int md_unloading; |
afc9a42b | 8343 | static __poll_t mdstat_poll(struct file *filp, poll_table *wait) |
d7603b7e | 8344 | { |
f1514638 | 8345 | struct seq_file *seq = filp->private_data; |
afc9a42b | 8346 | __poll_t mask; |
d7603b7e | 8347 | |
e2f23b60 | 8348 | if (md_unloading) |
a9a08845 | 8349 | return EPOLLIN|EPOLLRDNORM|EPOLLERR|EPOLLPRI; |
d7603b7e N |
8350 | poll_wait(filp, &md_event_waiters, wait); |
8351 | ||
8352 | /* always allow read */ | |
a9a08845 | 8353 | mask = EPOLLIN | EPOLLRDNORM; |
d7603b7e | 8354 | |
f1514638 | 8355 | if (seq->poll_event != atomic_read(&md_event_count)) |
a9a08845 | 8356 | mask |= EPOLLERR | EPOLLPRI; |
d7603b7e N |
8357 | return mask; |
8358 | } | |
8359 | ||
97a32539 AD |
8360 | static const struct proc_ops mdstat_proc_ops = { |
8361 | .proc_open = md_seq_open, | |
8362 | .proc_read = seq_read, | |
8363 | .proc_lseek = seq_lseek, | |
8364 | .proc_release = seq_release, | |
8365 | .proc_poll = mdstat_poll, | |
1da177e4 LT |
8366 | }; |
8367 | ||
84fc4b56 | 8368 | int register_md_personality(struct md_personality *p) |
1da177e4 | 8369 | { |
9d48739e N |
8370 | pr_debug("md: %s personality registered for level %d\n", |
8371 | p->name, p->level); | |
1da177e4 | 8372 | spin_lock(&pers_lock); |
2604b703 | 8373 | list_add_tail(&p->list, &pers_list); |
1da177e4 LT |
8374 | spin_unlock(&pers_lock); |
8375 | return 0; | |
8376 | } | |
6c144d31 | 8377 | EXPORT_SYMBOL(register_md_personality); |
1da177e4 | 8378 | |
84fc4b56 | 8379 | int unregister_md_personality(struct md_personality *p) |
1da177e4 | 8380 | { |
9d48739e | 8381 | pr_debug("md: %s personality unregistered\n", p->name); |
1da177e4 | 8382 | spin_lock(&pers_lock); |
2604b703 | 8383 | list_del_init(&p->list); |
1da177e4 LT |
8384 | spin_unlock(&pers_lock); |
8385 | return 0; | |
8386 | } | |
6c144d31 | 8387 | EXPORT_SYMBOL(unregister_md_personality); |
1da177e4 | 8388 | |
6022e75b N |
8389 | int register_md_cluster_operations(struct md_cluster_operations *ops, |
8390 | struct module *module) | |
edb39c9d | 8391 | { |
6022e75b | 8392 | int ret = 0; |
edb39c9d | 8393 | spin_lock(&pers_lock); |
6022e75b N |
8394 | if (md_cluster_ops != NULL) |
8395 | ret = -EALREADY; | |
8396 | else { | |
8397 | md_cluster_ops = ops; | |
8398 | md_cluster_mod = module; | |
8399 | } | |
edb39c9d | 8400 | spin_unlock(&pers_lock); |
6022e75b | 8401 | return ret; |
edb39c9d GR |
8402 | } |
8403 | EXPORT_SYMBOL(register_md_cluster_operations); | |
8404 | ||
8405 | int unregister_md_cluster_operations(void) | |
8406 | { | |
8407 | spin_lock(&pers_lock); | |
8408 | md_cluster_ops = NULL; | |
8409 | spin_unlock(&pers_lock); | |
8410 | return 0; | |
8411 | } | |
8412 | EXPORT_SYMBOL(unregister_md_cluster_operations); | |
8413 | ||
8414 | int md_setup_cluster(struct mddev *mddev, int nodes) | |
8415 | { | |
7c9d5c54 | 8416 | int ret; |
47a7b0d8 GJ |
8417 | if (!md_cluster_ops) |
8418 | request_module("md-cluster"); | |
edb39c9d | 8419 | spin_lock(&pers_lock); |
47a7b0d8 | 8420 | /* ensure module won't be unloaded */ |
edb39c9d | 8421 | if (!md_cluster_ops || !try_module_get(md_cluster_mod)) { |
9d48739e | 8422 | pr_warn("can't find md-cluster module or get it's reference.\n"); |
edb39c9d GR |
8423 | spin_unlock(&pers_lock); |
8424 | return -ENOENT; | |
8425 | } | |
8426 | spin_unlock(&pers_lock); | |
8427 | ||
7c9d5c54 ZH |
8428 | ret = md_cluster_ops->join(mddev, nodes); |
8429 | if (!ret) | |
8430 | mddev->safemode_delay = 0; | |
8431 | return ret; | |
edb39c9d GR |
8432 | } |
8433 | ||
8434 | void md_cluster_stop(struct mddev *mddev) | |
8435 | { | |
c4ce867f GR |
8436 | if (!md_cluster_ops) |
8437 | return; | |
edb39c9d GR |
8438 | md_cluster_ops->leave(mddev); |
8439 | module_put(md_cluster_mod); | |
8440 | } | |
8441 | ||
fd01b88c | 8442 | static int is_mddev_idle(struct mddev *mddev, int init) |
1da177e4 | 8443 | { |
f72ffdd6 | 8444 | struct md_rdev *rdev; |
1da177e4 | 8445 | int idle; |
eea1bf38 | 8446 | int curr_events; |
1da177e4 LT |
8447 | |
8448 | idle = 1; | |
4b80991c N |
8449 | rcu_read_lock(); |
8450 | rdev_for_each_rcu(rdev, mddev) { | |
4245e52d | 8451 | struct gendisk *disk = rdev->bdev->bd_disk; |
59767fbd | 8452 | curr_events = (int)part_stat_read_accum(&disk->part0, sectors) - |
eea1bf38 | 8453 | atomic_read(&disk->sync_io); |
713f6ab1 N |
8454 | /* sync IO will cause sync_io to increase before the disk_stats |
8455 | * as sync_io is counted when a request starts, and | |
8456 | * disk_stats is counted when it completes. | |
8457 | * So resync activity will cause curr_events to be smaller than | |
8458 | * when there was no such activity. | |
8459 | * non-sync IO will cause disk_stat to increase without | |
8460 | * increasing sync_io so curr_events will (eventually) | |
8461 | * be larger than it was before. Once it becomes | |
8462 | * substantially larger, the test below will cause | |
8463 | * the array to appear non-idle, and resync will slow | |
8464 | * down. | |
8465 | * If there is a lot of outstanding resync activity when | |
8466 | * we set last_event to curr_events, then all that activity | |
8467 | * completing might cause the array to appear non-idle | |
8468 | * and resync will be slowed down even though there might | |
8469 | * not have been non-resync activity. This will only | |
8470 | * happen once though. 'last_events' will soon reflect | |
8471 | * the state where there is little or no outstanding | |
8472 | * resync requests, and further resync activity will | |
8473 | * always make curr_events less than last_events. | |
c0e48521 | 8474 | * |
1da177e4 | 8475 | */ |
eea1bf38 | 8476 | if (init || curr_events - rdev->last_events > 64) { |
1da177e4 LT |
8477 | rdev->last_events = curr_events; |
8478 | idle = 0; | |
8479 | } | |
8480 | } | |
4b80991c | 8481 | rcu_read_unlock(); |
1da177e4 LT |
8482 | return idle; |
8483 | } | |
8484 | ||
fd01b88c | 8485 | void md_done_sync(struct mddev *mddev, int blocks, int ok) |
1da177e4 LT |
8486 | { |
8487 | /* another "blocks" (512byte) blocks have been synced */ | |
8488 | atomic_sub(blocks, &mddev->recovery_active); | |
8489 | wake_up(&mddev->recovery_wait); | |
8490 | if (!ok) { | |
dfc70645 | 8491 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
0a19caab | 8492 | set_bit(MD_RECOVERY_ERROR, &mddev->recovery); |
1da177e4 LT |
8493 | md_wakeup_thread(mddev->thread); |
8494 | // stop recovery, signal do_sync .... | |
8495 | } | |
8496 | } | |
6c144d31 | 8497 | EXPORT_SYMBOL(md_done_sync); |
1da177e4 | 8498 | |
06d91a5f N |
8499 | /* md_write_start(mddev, bi) |
8500 | * If we need to update some array metadata (e.g. 'active' flag | |
3d310eb7 N |
8501 | * in superblock) before writing, schedule a superblock update |
8502 | * and wait for it to complete. | |
cc27b0c7 N |
8503 | * A return value of 'false' means that the write wasn't recorded |
8504 | * and cannot proceed as the array is being suspend. | |
06d91a5f | 8505 | */ |
cc27b0c7 | 8506 | bool md_write_start(struct mddev *mddev, struct bio *bi) |
1da177e4 | 8507 | { |
0fd62b86 | 8508 | int did_change = 0; |
4b6c1060 | 8509 | |
06d91a5f | 8510 | if (bio_data_dir(bi) != WRITE) |
cc27b0c7 | 8511 | return true; |
06d91a5f | 8512 | |
f91de92e N |
8513 | BUG_ON(mddev->ro == 1); |
8514 | if (mddev->ro == 2) { | |
8515 | /* need to switch to read/write */ | |
8516 | mddev->ro = 0; | |
8517 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8518 | md_wakeup_thread(mddev->thread); | |
25156198 | 8519 | md_wakeup_thread(mddev->sync_thread); |
0fd62b86 | 8520 | did_change = 1; |
f91de92e | 8521 | } |
4ad23a97 N |
8522 | rcu_read_lock(); |
8523 | percpu_ref_get(&mddev->writes_pending); | |
55cc39f3 | 8524 | smp_mb(); /* Match smp_mb in set_in_sync() */ |
31a59e34 N |
8525 | if (mddev->safemode == 1) |
8526 | mddev->safemode = 0; | |
4ad23a97 | 8527 | /* sync_checkers is always 0 when writes_pending is in per-cpu mode */ |
81fe48e9 | 8528 | if (mddev->in_sync || mddev->sync_checkers) { |
85572d7c | 8529 | spin_lock(&mddev->lock); |
3d310eb7 N |
8530 | if (mddev->in_sync) { |
8531 | mddev->in_sync = 0; | |
2953079c SL |
8532 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8533 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
3d310eb7 | 8534 | md_wakeup_thread(mddev->thread); |
0fd62b86 | 8535 | did_change = 1; |
3d310eb7 | 8536 | } |
85572d7c | 8537 | spin_unlock(&mddev->lock); |
06d91a5f | 8538 | } |
4ad23a97 | 8539 | rcu_read_unlock(); |
0fd62b86 | 8540 | if (did_change) |
00bcb4ac | 8541 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
4b6c1060 HM |
8542 | if (!mddev->has_superblocks) |
8543 | return true; | |
09a44cc1 | 8544 | wait_event(mddev->sb_wait, |
d47c8ad2 N |
8545 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags) || |
8546 | mddev->suspended); | |
cc27b0c7 N |
8547 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) { |
8548 | percpu_ref_put(&mddev->writes_pending); | |
8549 | return false; | |
8550 | } | |
8551 | return true; | |
1da177e4 | 8552 | } |
6c144d31 | 8553 | EXPORT_SYMBOL(md_write_start); |
1da177e4 | 8554 | |
49728050 N |
8555 | /* md_write_inc can only be called when md_write_start() has |
8556 | * already been called at least once of the current request. | |
8557 | * It increments the counter and is useful when a single request | |
8558 | * is split into several parts. Each part causes an increment and | |
8559 | * so needs a matching md_write_end(). | |
8560 | * Unlike md_write_start(), it is safe to call md_write_inc() inside | |
8561 | * a spinlocked region. | |
8562 | */ | |
8563 | void md_write_inc(struct mddev *mddev, struct bio *bi) | |
8564 | { | |
8565 | if (bio_data_dir(bi) != WRITE) | |
8566 | return; | |
8567 | WARN_ON_ONCE(mddev->in_sync || mddev->ro); | |
4ad23a97 | 8568 | percpu_ref_get(&mddev->writes_pending); |
49728050 N |
8569 | } |
8570 | EXPORT_SYMBOL(md_write_inc); | |
8571 | ||
fd01b88c | 8572 | void md_write_end(struct mddev *mddev) |
1da177e4 | 8573 | { |
4ad23a97 N |
8574 | percpu_ref_put(&mddev->writes_pending); |
8575 | ||
8576 | if (mddev->safemode == 2) | |
8577 | md_wakeup_thread(mddev->thread); | |
8578 | else if (mddev->safemode_delay) | |
8579 | /* The roundup() ensures this only performs locking once | |
8580 | * every ->safemode_delay jiffies | |
8581 | */ | |
8582 | mod_timer(&mddev->safemode_timer, | |
8583 | roundup(jiffies, mddev->safemode_delay) + | |
8584 | mddev->safemode_delay); | |
1da177e4 | 8585 | } |
4ad23a97 | 8586 | |
6c144d31 | 8587 | EXPORT_SYMBOL(md_write_end); |
1da177e4 | 8588 | |
2628089b XN |
8589 | /* This is used by raid0 and raid10 */ |
8590 | void md_submit_discard_bio(struct mddev *mddev, struct md_rdev *rdev, | |
8591 | struct bio *bio, sector_t start, sector_t size) | |
8592 | { | |
8593 | struct bio *discard_bio = NULL; | |
8594 | ||
8595 | if (__blkdev_issue_discard(rdev->bdev, start, size, | |
8596 | GFP_NOIO, 0, &discard_bio) || !discard_bio) | |
8597 | return; | |
8598 | ||
8599 | bio_chain(discard_bio, bio); | |
8600 | bio_clone_blkg_association(discard_bio, bio); | |
8601 | if (mddev->gendisk) | |
8602 | trace_block_bio_remap(bdev_get_queue(rdev->bdev), | |
8603 | discard_bio, disk_devt(mddev->gendisk), | |
8604 | bio->bi_iter.bi_sector); | |
8605 | submit_bio_noacct(discard_bio); | |
8606 | } | |
8607 | EXPORT_SYMBOL(md_submit_discard_bio); | |
8608 | ||
2a2275d6 N |
8609 | /* md_allow_write(mddev) |
8610 | * Calling this ensures that the array is marked 'active' so that writes | |
8611 | * may proceed without blocking. It is important to call this before | |
8612 | * attempting a GFP_KERNEL allocation while holding the mddev lock. | |
8613 | * Must be called with mddev_lock held. | |
8614 | */ | |
2214c260 | 8615 | void md_allow_write(struct mddev *mddev) |
2a2275d6 N |
8616 | { |
8617 | if (!mddev->pers) | |
2214c260 | 8618 | return; |
2a2275d6 | 8619 | if (mddev->ro) |
2214c260 | 8620 | return; |
1a0fd497 | 8621 | if (!mddev->pers->sync_request) |
2214c260 | 8622 | return; |
2a2275d6 | 8623 | |
85572d7c | 8624 | spin_lock(&mddev->lock); |
2a2275d6 N |
8625 | if (mddev->in_sync) { |
8626 | mddev->in_sync = 0; | |
2953079c SL |
8627 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8628 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
2a2275d6 N |
8629 | if (mddev->safemode_delay && |
8630 | mddev->safemode == 0) | |
8631 | mddev->safemode = 1; | |
85572d7c | 8632 | spin_unlock(&mddev->lock); |
2a2275d6 | 8633 | md_update_sb(mddev, 0); |
00bcb4ac | 8634 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
2214c260 AP |
8635 | /* wait for the dirty state to be recorded in the metadata */ |
8636 | wait_event(mddev->sb_wait, | |
2214c260 | 8637 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
2a2275d6 | 8638 | } else |
85572d7c | 8639 | spin_unlock(&mddev->lock); |
2a2275d6 N |
8640 | } |
8641 | EXPORT_SYMBOL_GPL(md_allow_write); | |
8642 | ||
1da177e4 LT |
8643 | #define SYNC_MARKS 10 |
8644 | #define SYNC_MARK_STEP (3*HZ) | |
54f89341 | 8645 | #define UPDATE_FREQUENCY (5*60*HZ) |
4ed8731d | 8646 | void md_do_sync(struct md_thread *thread) |
1da177e4 | 8647 | { |
4ed8731d | 8648 | struct mddev *mddev = thread->mddev; |
fd01b88c | 8649 | struct mddev *mddev2; |
e5b521ee | 8650 | unsigned int currspeed = 0, window; |
ac7e50a3 | 8651 | sector_t max_sectors,j, io_sectors, recovery_done; |
1da177e4 | 8652 | unsigned long mark[SYNC_MARKS]; |
54f89341 | 8653 | unsigned long update_time; |
1da177e4 LT |
8654 | sector_t mark_cnt[SYNC_MARKS]; |
8655 | int last_mark,m; | |
8656 | struct list_head *tmp; | |
8657 | sector_t last_check; | |
57afd89f | 8658 | int skipped = 0; |
3cb03002 | 8659 | struct md_rdev *rdev; |
c4a39551 | 8660 | char *desc, *action = NULL; |
7c2c57c9 | 8661 | struct blk_plug plug; |
41a9a0dc | 8662 | int ret; |
1da177e4 LT |
8663 | |
8664 | /* just incase thread restarts... */ | |
d5d885fd SL |
8665 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
8666 | test_bit(MD_RECOVERY_WAIT, &mddev->recovery)) | |
1da177e4 | 8667 | return; |
3991b31e N |
8668 | if (mddev->ro) {/* never try to sync a read-only array */ |
8669 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
5fd6c1dc | 8670 | return; |
3991b31e | 8671 | } |
1da177e4 | 8672 | |
41a9a0dc GJ |
8673 | if (mddev_is_clustered(mddev)) { |
8674 | ret = md_cluster_ops->resync_start(mddev); | |
8675 | if (ret) | |
8676 | goto skip; | |
8677 | ||
bb8bf15b | 8678 | set_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags); |
41a9a0dc GJ |
8679 | if (!(test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8680 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) || | |
8681 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) | |
8682 | && ((unsigned long long)mddev->curr_resync_completed | |
8683 | < (unsigned long long)mddev->resync_max_sectors)) | |
8684 | goto skip; | |
8685 | } | |
8686 | ||
61df9d91 | 8687 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
c4a39551 | 8688 | if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) { |
61df9d91 | 8689 | desc = "data-check"; |
c4a39551 JB |
8690 | action = "check"; |
8691 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
61df9d91 | 8692 | desc = "requested-resync"; |
c4a39551 JB |
8693 | action = "repair"; |
8694 | } else | |
61df9d91 N |
8695 | desc = "resync"; |
8696 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
8697 | desc = "reshape"; | |
8698 | else | |
8699 | desc = "recovery"; | |
8700 | ||
c4a39551 JB |
8701 | mddev->last_sync_action = action ?: desc; |
8702 | ||
1da177e4 LT |
8703 | /* we overload curr_resync somewhat here. |
8704 | * 0 == not engaged in resync at all | |
8705 | * 2 == checking that there is no conflict with another sync | |
8706 | * 1 == like 2, but have yielded to allow conflicting resync to | |
e5b521ee | 8707 | * commence |
1da177e4 LT |
8708 | * other == active in resync - this many blocks |
8709 | * | |
8710 | * Before starting a resync we must have set curr_resync to | |
8711 | * 2, and then checked that every "conflicting" array has curr_resync | |
8712 | * less than ours. When we find one that is the same or higher | |
8713 | * we wait on resync_wait. To avoid deadlock, we reduce curr_resync | |
8714 | * to 1 if we choose to yield (based arbitrarily on address of mddev structure). | |
8715 | * This will mean we have to start checking from the beginning again. | |
8716 | * | |
8717 | */ | |
8718 | ||
8719 | do { | |
c622ca54 | 8720 | int mddev2_minor = -1; |
1da177e4 LT |
8721 | mddev->curr_resync = 2; |
8722 | ||
8723 | try_again: | |
404e4b43 | 8724 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
1da177e4 | 8725 | goto skip; |
29ac4aa3 | 8726 | for_each_mddev(mddev2, tmp) { |
1da177e4 LT |
8727 | if (mddev2 == mddev) |
8728 | continue; | |
90b08710 BS |
8729 | if (!mddev->parallel_resync |
8730 | && mddev2->curr_resync | |
8731 | && match_mddev_units(mddev, mddev2)) { | |
1da177e4 LT |
8732 | DEFINE_WAIT(wq); |
8733 | if (mddev < mddev2 && mddev->curr_resync == 2) { | |
8734 | /* arbitrarily yield */ | |
8735 | mddev->curr_resync = 1; | |
8736 | wake_up(&resync_wait); | |
8737 | } | |
8738 | if (mddev > mddev2 && mddev->curr_resync == 1) | |
8739 | /* no need to wait here, we can wait the next | |
8740 | * time 'round when curr_resync == 2 | |
8741 | */ | |
8742 | continue; | |
9744197c N |
8743 | /* We need to wait 'interruptible' so as not to |
8744 | * contribute to the load average, and not to | |
8745 | * be caught by 'softlockup' | |
8746 | */ | |
8747 | prepare_to_wait(&resync_wait, &wq, TASK_INTERRUPTIBLE); | |
c91abf5a | 8748 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
8712e553 | 8749 | mddev2->curr_resync >= mddev->curr_resync) { |
c622ca54 AP |
8750 | if (mddev2_minor != mddev2->md_minor) { |
8751 | mddev2_minor = mddev2->md_minor; | |
9d48739e N |
8752 | pr_info("md: delaying %s of %s until %s has finished (they share one or more physical units)\n", |
8753 | desc, mdname(mddev), | |
8754 | mdname(mddev2)); | |
c622ca54 | 8755 | } |
1da177e4 | 8756 | mddev_put(mddev2); |
9744197c N |
8757 | if (signal_pending(current)) |
8758 | flush_signals(current); | |
1da177e4 LT |
8759 | schedule(); |
8760 | finish_wait(&resync_wait, &wq); | |
8761 | goto try_again; | |
8762 | } | |
8763 | finish_wait(&resync_wait, &wq); | |
8764 | } | |
8765 | } | |
8766 | } while (mddev->curr_resync < 2); | |
8767 | ||
5fd6c1dc | 8768 | j = 0; |
9d88883e | 8769 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
1da177e4 | 8770 | /* resync follows the size requested by the personality, |
57afd89f | 8771 | * which defaults to physical size, but can be virtual size |
1da177e4 LT |
8772 | */ |
8773 | max_sectors = mddev->resync_max_sectors; | |
7f7583d4 | 8774 | atomic64_set(&mddev->resync_mismatches, 0); |
5fd6c1dc | 8775 | /* we don't use the checkpoint if there's a bitmap */ |
5e96ee65 NB |
8776 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) |
8777 | j = mddev->resync_min; | |
8778 | else if (!mddev->bitmap) | |
5fd6c1dc | 8779 | j = mddev->recovery_cp; |
5e96ee65 | 8780 | |
cb9ee154 | 8781 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) { |
c804cdec | 8782 | max_sectors = mddev->resync_max_sectors; |
cb9ee154 GJ |
8783 | /* |
8784 | * If the original node aborts reshaping then we continue the | |
8785 | * reshaping, so set j again to avoid restart reshape from the | |
8786 | * first beginning | |
8787 | */ | |
8788 | if (mddev_is_clustered(mddev) && | |
8789 | mddev->reshape_position != MaxSector) | |
8790 | j = mddev->reshape_position; | |
8791 | } else { | |
1da177e4 | 8792 | /* recovery follows the physical size of devices */ |
58c0fed4 | 8793 | max_sectors = mddev->dev_sectors; |
5fd6c1dc | 8794 | j = MaxSector; |
4e59ca7d | 8795 | rcu_read_lock(); |
dafb20fa | 8796 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 8797 | if (rdev->raid_disk >= 0 && |
f2076e7d | 8798 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
8799 | !test_bit(Faulty, &rdev->flags) && |
8800 | !test_bit(In_sync, &rdev->flags) && | |
8801 | rdev->recovery_offset < j) | |
8802 | j = rdev->recovery_offset; | |
4e59ca7d | 8803 | rcu_read_unlock(); |
133d4527 N |
8804 | |
8805 | /* If there is a bitmap, we need to make sure all | |
8806 | * writes that started before we added a spare | |
8807 | * complete before we start doing a recovery. | |
8808 | * Otherwise the write might complete and (via | |
8809 | * bitmap_endwrite) set a bit in the bitmap after the | |
8810 | * recovery has checked that bit and skipped that | |
8811 | * region. | |
8812 | */ | |
8813 | if (mddev->bitmap) { | |
8814 | mddev->pers->quiesce(mddev, 1); | |
8815 | mddev->pers->quiesce(mddev, 0); | |
8816 | } | |
5fd6c1dc | 8817 | } |
1da177e4 | 8818 | |
9d48739e N |
8819 | pr_info("md: %s of RAID array %s\n", desc, mdname(mddev)); |
8820 | pr_debug("md: minimum _guaranteed_ speed: %d KB/sec/disk.\n", speed_min(mddev)); | |
8821 | pr_debug("md: using maximum available idle IO bandwidth (but not more than %d KB/sec) for %s.\n", | |
8822 | speed_max(mddev), desc); | |
1da177e4 | 8823 | |
eea1bf38 | 8824 | is_mddev_idle(mddev, 1); /* this initializes IO event counters */ |
5fd6c1dc | 8825 | |
57afd89f | 8826 | io_sectors = 0; |
1da177e4 LT |
8827 | for (m = 0; m < SYNC_MARKS; m++) { |
8828 | mark[m] = jiffies; | |
57afd89f | 8829 | mark_cnt[m] = io_sectors; |
1da177e4 LT |
8830 | } |
8831 | last_mark = 0; | |
8832 | mddev->resync_mark = mark[last_mark]; | |
8833 | mddev->resync_mark_cnt = mark_cnt[last_mark]; | |
8834 | ||
8835 | /* | |
8836 | * Tune reconstruction: | |
8837 | */ | |
e5b521ee | 8838 | window = 32 * (PAGE_SIZE / 512); |
9d48739e N |
8839 | pr_debug("md: using %dk window, over a total of %lluk.\n", |
8840 | window/2, (unsigned long long)max_sectors/2); | |
1da177e4 LT |
8841 | |
8842 | atomic_set(&mddev->recovery_active, 0); | |
1da177e4 LT |
8843 | last_check = 0; |
8844 | ||
8845 | if (j>2) { | |
9d48739e N |
8846 | pr_debug("md: resuming %s of %s from checkpoint.\n", |
8847 | desc, mdname(mddev)); | |
1da177e4 | 8848 | mddev->curr_resync = j; |
72f36d59 N |
8849 | } else |
8850 | mddev->curr_resync = 3; /* no longer delayed */ | |
75d3da43 | 8851 | mddev->curr_resync_completed = j; |
e1a86dbb | 8852 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
72f36d59 | 8853 | md_new_event(mddev); |
54f89341 | 8854 | update_time = jiffies; |
1da177e4 | 8855 | |
7c2c57c9 | 8856 | blk_start_plug(&plug); |
1da177e4 | 8857 | while (j < max_sectors) { |
57afd89f | 8858 | sector_t sectors; |
1da177e4 | 8859 | |
57afd89f | 8860 | skipped = 0; |
97e4f42d | 8861 | |
7a91ee1f N |
8862 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8863 | ((mddev->curr_resync > mddev->curr_resync_completed && | |
8864 | (mddev->curr_resync - mddev->curr_resync_completed) | |
8865 | > (max_sectors >> 4)) || | |
54f89341 | 8866 | time_after_eq(jiffies, update_time + UPDATE_FREQUENCY) || |
7a91ee1f | 8867 | (j - mddev->curr_resync_completed)*2 |
c5e19d90 N |
8868 | >= mddev->resync_max - mddev->curr_resync_completed || |
8869 | mddev->curr_resync_completed > mddev->resync_max | |
7a91ee1f | 8870 | )) { |
97e4f42d | 8871 | /* time to update curr_resync_completed */ |
97e4f42d N |
8872 | wait_event(mddev->recovery_wait, |
8873 | atomic_read(&mddev->recovery_active) == 0); | |
75d3da43 | 8874 | mddev->curr_resync_completed = j; |
35d78c66 | 8875 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && |
8876 | j > mddev->recovery_cp) | |
8877 | mddev->recovery_cp = j; | |
54f89341 | 8878 | update_time = jiffies; |
2953079c | 8879 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
e1a86dbb | 8880 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
97e4f42d | 8881 | } |
acb180b0 | 8882 | |
c91abf5a N |
8883 | while (j >= mddev->resync_max && |
8884 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
e62e58a5 N |
8885 | /* As this condition is controlled by user-space, |
8886 | * we can block indefinitely, so use '_interruptible' | |
8887 | * to avoid triggering warnings. | |
8888 | */ | |
8889 | flush_signals(current); /* just in case */ | |
8890 | wait_event_interruptible(mddev->recovery_wait, | |
8891 | mddev->resync_max > j | |
c91abf5a N |
8892 | || test_bit(MD_RECOVERY_INTR, |
8893 | &mddev->recovery)); | |
e62e58a5 | 8894 | } |
acb180b0 | 8895 | |
c91abf5a N |
8896 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8897 | break; | |
acb180b0 | 8898 | |
09314799 | 8899 | sectors = mddev->pers->sync_request(mddev, j, &skipped); |
57afd89f | 8900 | if (sectors == 0) { |
dfc70645 | 8901 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
c91abf5a | 8902 | break; |
1da177e4 | 8903 | } |
57afd89f N |
8904 | |
8905 | if (!skipped) { /* actual IO requested */ | |
8906 | io_sectors += sectors; | |
8907 | atomic_add(sectors, &mddev->recovery_active); | |
8908 | } | |
8909 | ||
e875ecea N |
8910 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8911 | break; | |
8912 | ||
1da177e4 | 8913 | j += sectors; |
5ed1df2e N |
8914 | if (j > max_sectors) |
8915 | /* when skipping, extra large numbers can be returned. */ | |
8916 | j = max_sectors; | |
72f36d59 N |
8917 | if (j > 2) |
8918 | mddev->curr_resync = j; | |
ff4e8d9a | 8919 | mddev->curr_mark_cnt = io_sectors; |
d7603b7e | 8920 | if (last_check == 0) |
e875ecea | 8921 | /* this is the earliest that rebuild will be |
d7603b7e N |
8922 | * visible in /proc/mdstat |
8923 | */ | |
8924 | md_new_event(mddev); | |
57afd89f N |
8925 | |
8926 | if (last_check + window > io_sectors || j == max_sectors) | |
1da177e4 LT |
8927 | continue; |
8928 | ||
57afd89f | 8929 | last_check = io_sectors; |
1da177e4 LT |
8930 | repeat: |
8931 | if (time_after_eq(jiffies, mark[last_mark] + SYNC_MARK_STEP )) { | |
8932 | /* step marks */ | |
8933 | int next = (last_mark+1) % SYNC_MARKS; | |
8934 | ||
8935 | mddev->resync_mark = mark[next]; | |
8936 | mddev->resync_mark_cnt = mark_cnt[next]; | |
8937 | mark[next] = jiffies; | |
57afd89f | 8938 | mark_cnt[next] = io_sectors - atomic_read(&mddev->recovery_active); |
1da177e4 LT |
8939 | last_mark = next; |
8940 | } | |
8941 | ||
c91abf5a N |
8942 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8943 | break; | |
1da177e4 LT |
8944 | |
8945 | /* | |
8946 | * this loop exits only if either when we are slower than | |
8947 | * the 'hard' speed limit, or the system was IO-idle for | |
8948 | * a jiffy. | |
8949 | * the system might be non-idle CPU-wise, but we only care | |
8950 | * about not overloading the IO subsystem. (things like an | |
8951 | * e2fsck being done on the RAID array should execute fast) | |
8952 | */ | |
1da177e4 LT |
8953 | cond_resched(); |
8954 | ||
ac7e50a3 XN |
8955 | recovery_done = io_sectors - atomic_read(&mddev->recovery_active); |
8956 | currspeed = ((unsigned long)(recovery_done - mddev->resync_mark_cnt))/2 | |
57afd89f | 8957 | /((jiffies-mddev->resync_mark)/HZ +1) +1; |
1da177e4 | 8958 | |
88202a0c | 8959 | if (currspeed > speed_min(mddev)) { |
ac8fa419 | 8960 | if (currspeed > speed_max(mddev)) { |
c0e48521 | 8961 | msleep(500); |
1da177e4 LT |
8962 | goto repeat; |
8963 | } | |
ac8fa419 N |
8964 | if (!is_mddev_idle(mddev, 0)) { |
8965 | /* | |
8966 | * Give other IO more of a chance. | |
8967 | * The faster the devices, the less we wait. | |
8968 | */ | |
8969 | wait_event(mddev->recovery_wait, | |
8970 | !atomic_read(&mddev->recovery_active)); | |
8971 | } | |
1da177e4 LT |
8972 | } |
8973 | } | |
9d48739e N |
8974 | pr_info("md: %s: %s %s.\n",mdname(mddev), desc, |
8975 | test_bit(MD_RECOVERY_INTR, &mddev->recovery) | |
8976 | ? "interrupted" : "done"); | |
1da177e4 LT |
8977 | /* |
8978 | * this also signals 'finished resyncing' to md_stop | |
8979 | */ | |
7c2c57c9 | 8980 | blk_finish_plug(&plug); |
1da177e4 LT |
8981 | wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active)); |
8982 | ||
5ed1df2e N |
8983 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8984 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
1217e1d1 | 8985 | mddev->curr_resync > 3) { |
5ed1df2e | 8986 | mddev->curr_resync_completed = mddev->curr_resync; |
e1a86dbb | 8987 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
5ed1df2e | 8988 | } |
09314799 | 8989 | mddev->pers->sync_request(mddev, max_sectors, &skipped); |
1da177e4 | 8990 | |
dfc70645 | 8991 | if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) && |
1217e1d1 | 8992 | mddev->curr_resync > 3) { |
5fd6c1dc N |
8993 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
8994 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
8995 | if (mddev->curr_resync >= mddev->recovery_cp) { | |
9d48739e N |
8996 | pr_debug("md: checkpointing %s of %s.\n", |
8997 | desc, mdname(mddev)); | |
0a19caab | 8998 | if (test_bit(MD_RECOVERY_ERROR, |
8999 | &mddev->recovery)) | |
9000 | mddev->recovery_cp = | |
9001 | mddev->curr_resync_completed; | |
9002 | else | |
9003 | mddev->recovery_cp = | |
9004 | mddev->curr_resync; | |
5fd6c1dc N |
9005 | } |
9006 | } else | |
9007 | mddev->recovery_cp = MaxSector; | |
9008 | } else { | |
9009 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) | |
9010 | mddev->curr_resync = MaxSector; | |
db0505d3 N |
9011 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9012 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) { | |
9013 | rcu_read_lock(); | |
9014 | rdev_for_each_rcu(rdev, mddev) | |
9015 | if (rdev->raid_disk >= 0 && | |
9016 | mddev->delta_disks >= 0 && | |
9017 | !test_bit(Journal, &rdev->flags) && | |
9018 | !test_bit(Faulty, &rdev->flags) && | |
9019 | !test_bit(In_sync, &rdev->flags) && | |
9020 | rdev->recovery_offset < mddev->curr_resync) | |
9021 | rdev->recovery_offset = mddev->curr_resync; | |
9022 | rcu_read_unlock(); | |
9023 | } | |
5fd6c1dc | 9024 | } |
1da177e4 | 9025 | } |
db91ff55 | 9026 | skip: |
bb8bf15b GJ |
9027 | /* set CHANGE_PENDING here since maybe another update is needed, |
9028 | * so other nodes are informed. It should be harmless for normal | |
9029 | * raid */ | |
2953079c SL |
9030 | set_mask_bits(&mddev->sb_flags, 0, |
9031 | BIT(MD_SB_CHANGE_PENDING) | BIT(MD_SB_CHANGE_DEVS)); | |
c186b128 | 9032 | |
8876391e BC |
9033 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9034 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
9035 | mddev->delta_disks > 0 && | |
9036 | mddev->pers->finish_reshape && | |
9037 | mddev->pers->size && | |
9038 | mddev->queue) { | |
9039 | mddev_lock_nointr(mddev); | |
9040 | md_set_array_sectors(mddev, mddev->pers->size(mddev, 0, 0)); | |
9041 | mddev_unlock(mddev); | |
aefb2e5f GJ |
9042 | if (!mddev_is_clustered(mddev)) { |
9043 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
659e56ba | 9044 | revalidate_disk_size(mddev->gendisk, true); |
aefb2e5f | 9045 | } |
8876391e BC |
9046 | } |
9047 | ||
23da422b | 9048 | spin_lock(&mddev->lock); |
c07b70ad N |
9049 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { |
9050 | /* We completed so min/max setting can be forgotten if used. */ | |
9051 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
9052 | mddev->resync_min = 0; | |
9053 | mddev->resync_max = MaxSector; | |
9054 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
9055 | mddev->resync_min = mddev->curr_resync_completed; | |
f7851be7 | 9056 | set_bit(MD_RECOVERY_DONE, &mddev->recovery); |
1da177e4 | 9057 | mddev->curr_resync = 0; |
23da422b N |
9058 | spin_unlock(&mddev->lock); |
9059 | ||
1da177e4 | 9060 | wake_up(&resync_wait); |
1da177e4 | 9061 | md_wakeup_thread(mddev->thread); |
c6207277 | 9062 | return; |
1da177e4 | 9063 | } |
29269553 | 9064 | EXPORT_SYMBOL_GPL(md_do_sync); |
1da177e4 | 9065 | |
746d3207 N |
9066 | static int remove_and_add_spares(struct mddev *mddev, |
9067 | struct md_rdev *this) | |
b4c4c7b8 | 9068 | { |
3cb03002 | 9069 | struct md_rdev *rdev; |
b4c4c7b8 | 9070 | int spares = 0; |
f2a371c5 | 9071 | int removed = 0; |
d787be40 | 9072 | bool remove_some = false; |
b4c4c7b8 | 9073 | |
39772f0a N |
9074 | if (this && test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
9075 | /* Mustn't remove devices when resync thread is running */ | |
9076 | return 0; | |
9077 | ||
d787be40 N |
9078 | rdev_for_each(rdev, mddev) { |
9079 | if ((this == NULL || rdev == this) && | |
9080 | rdev->raid_disk >= 0 && | |
9081 | !test_bit(Blocked, &rdev->flags) && | |
9082 | test_bit(Faulty, &rdev->flags) && | |
9083 | atomic_read(&rdev->nr_pending)==0) { | |
9084 | /* Faulty non-Blocked devices with nr_pending == 0 | |
9085 | * never get nr_pending incremented, | |
9086 | * never get Faulty cleared, and never get Blocked set. | |
9087 | * So we can synchronize_rcu now rather than once per device | |
9088 | */ | |
9089 | remove_some = true; | |
9090 | set_bit(RemoveSynchronized, &rdev->flags); | |
9091 | } | |
9092 | } | |
9093 | ||
9094 | if (remove_some) | |
9095 | synchronize_rcu(); | |
9096 | rdev_for_each(rdev, mddev) { | |
746d3207 N |
9097 | if ((this == NULL || rdev == this) && |
9098 | rdev->raid_disk >= 0 && | |
6bfe0b49 | 9099 | !test_bit(Blocked, &rdev->flags) && |
d787be40 | 9100 | ((test_bit(RemoveSynchronized, &rdev->flags) || |
f2076e7d SL |
9101 | (!test_bit(In_sync, &rdev->flags) && |
9102 | !test_bit(Journal, &rdev->flags))) && | |
d787be40 | 9103 | atomic_read(&rdev->nr_pending)==0)) { |
b4c4c7b8 | 9104 | if (mddev->pers->hot_remove_disk( |
b8321b68 | 9105 | mddev, rdev) == 0) { |
36fad858 | 9106 | sysfs_unlink_rdev(mddev, rdev); |
011abdc9 | 9107 | rdev->saved_raid_disk = rdev->raid_disk; |
b4c4c7b8 | 9108 | rdev->raid_disk = -1; |
f2a371c5 | 9109 | removed++; |
b4c4c7b8 N |
9110 | } |
9111 | } | |
d787be40 N |
9112 | if (remove_some && test_bit(RemoveSynchronized, &rdev->flags)) |
9113 | clear_bit(RemoveSynchronized, &rdev->flags); | |
9114 | } | |
9115 | ||
90584fc9 | 9116 | if (removed && mddev->kobj.sd) |
e1a86dbb | 9117 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
b4c4c7b8 | 9118 | |
2910ff17 | 9119 | if (this && removed) |
746d3207 N |
9120 | goto no_add; |
9121 | ||
dafb20fa | 9122 | rdev_for_each(rdev, mddev) { |
2910ff17 GR |
9123 | if (this && this != rdev) |
9124 | continue; | |
dbb64f86 GR |
9125 | if (test_bit(Candidate, &rdev->flags)) |
9126 | continue; | |
7bfec5f3 N |
9127 | if (rdev->raid_disk >= 0 && |
9128 | !test_bit(In_sync, &rdev->flags) && | |
f2076e7d | 9129 | !test_bit(Journal, &rdev->flags) && |
7bfec5f3 N |
9130 | !test_bit(Faulty, &rdev->flags)) |
9131 | spares++; | |
7ceb17e8 N |
9132 | if (rdev->raid_disk >= 0) |
9133 | continue; | |
9134 | if (test_bit(Faulty, &rdev->flags)) | |
9135 | continue; | |
f6b6ec5c SL |
9136 | if (!test_bit(Journal, &rdev->flags)) { |
9137 | if (mddev->ro && | |
9138 | ! (rdev->saved_raid_disk >= 0 && | |
9139 | !test_bit(Bitmap_sync, &rdev->flags))) | |
9140 | continue; | |
7ceb17e8 | 9141 | |
f6b6ec5c SL |
9142 | rdev->recovery_offset = 0; |
9143 | } | |
3f79cc22 | 9144 | if (mddev->pers->hot_add_disk(mddev, rdev) == 0) { |
5e3b8a8d DLM |
9145 | /* failure here is OK */ |
9146 | sysfs_link_rdev(mddev, rdev); | |
f6b6ec5c SL |
9147 | if (!test_bit(Journal, &rdev->flags)) |
9148 | spares++; | |
7ceb17e8 | 9149 | md_new_event(mddev); |
2953079c | 9150 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
dfc70645 | 9151 | } |
b4c4c7b8 | 9152 | } |
746d3207 | 9153 | no_add: |
6dafab6b | 9154 | if (removed) |
2953079c | 9155 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
b4c4c7b8 N |
9156 | return spares; |
9157 | } | |
7ebc0be7 | 9158 | |
ac05f256 N |
9159 | static void md_start_sync(struct work_struct *ws) |
9160 | { | |
9161 | struct mddev *mddev = container_of(ws, struct mddev, del_work); | |
c186b128 | 9162 | |
ac05f256 N |
9163 | mddev->sync_thread = md_register_thread(md_do_sync, |
9164 | mddev, | |
9165 | "resync"); | |
9166 | if (!mddev->sync_thread) { | |
9d48739e N |
9167 | pr_warn("%s: could not start resync thread...\n", |
9168 | mdname(mddev)); | |
ac05f256 N |
9169 | /* leave the spares where they are, it shouldn't hurt */ |
9170 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
9171 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9172 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9173 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
9174 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 9175 | wake_up(&resync_wait); |
ac05f256 N |
9176 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
9177 | &mddev->recovery)) | |
9178 | if (mddev->sysfs_action) | |
9179 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9180 | } else | |
9181 | md_wakeup_thread(mddev->sync_thread); | |
9182 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9183 | md_new_event(mddev); | |
9184 | } | |
9185 | ||
1da177e4 LT |
9186 | /* |
9187 | * This routine is regularly called by all per-raid-array threads to | |
9188 | * deal with generic issues like resync and super-block update. | |
9189 | * Raid personalities that don't have a thread (linear/raid0) do not | |
9190 | * need this as they never do any recovery or update the superblock. | |
9191 | * | |
9192 | * It does not do any resync itself, but rather "forks" off other threads | |
9193 | * to do that as needed. | |
9194 | * When it is determined that resync is needed, we set MD_RECOVERY_RUNNING in | |
9195 | * "->recovery" and create a thread at ->sync_thread. | |
dfc70645 | 9196 | * When the thread finishes it sets MD_RECOVERY_DONE |
1da177e4 LT |
9197 | * and wakeups up this thread which will reap the thread and finish up. |
9198 | * This thread also removes any faulty devices (with nr_pending == 0). | |
9199 | * | |
9200 | * The overall approach is: | |
9201 | * 1/ if the superblock needs updating, update it. | |
9202 | * 2/ If a recovery thread is running, don't do anything else. | |
9203 | * 3/ If recovery has finished, clean up, possibly marking spares active. | |
9204 | * 4/ If there are any faulty devices, remove them. | |
9205 | * 5/ If array is degraded, try to add spares devices | |
9206 | * 6/ If array has spares or is not in-sync, start a resync thread. | |
9207 | */ | |
fd01b88c | 9208 | void md_check_recovery(struct mddev *mddev) |
1da177e4 | 9209 | { |
059421e0 N |
9210 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags) && mddev->sb_flags) { |
9211 | /* Write superblock - thread that called mddev_suspend() | |
9212 | * holds reconfig_mutex for us. | |
9213 | */ | |
9214 | set_bit(MD_UPDATING_SB, &mddev->flags); | |
9215 | smp_mb__after_atomic(); | |
9216 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags)) | |
9217 | md_update_sb(mddev, 0); | |
9218 | clear_bit_unlock(MD_UPDATING_SB, &mddev->flags); | |
9219 | wake_up(&mddev->sb_wait); | |
9220 | } | |
9221 | ||
68866e42 JB |
9222 | if (mddev->suspended) |
9223 | return; | |
9224 | ||
5f40402d | 9225 | if (mddev->bitmap) |
e64e4018 | 9226 | md_bitmap_daemon_work(mddev); |
1da177e4 | 9227 | |
fca4d848 | 9228 | if (signal_pending(current)) { |
31a59e34 | 9229 | if (mddev->pers->sync_request && !mddev->external) { |
9d48739e N |
9230 | pr_debug("md: %s in immediate safe mode\n", |
9231 | mdname(mddev)); | |
fca4d848 N |
9232 | mddev->safemode = 2; |
9233 | } | |
9234 | flush_signals(current); | |
9235 | } | |
9236 | ||
c89a8eee N |
9237 | if (mddev->ro && !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) |
9238 | return; | |
1da177e4 | 9239 | if ( ! ( |
2953079c | 9240 | (mddev->sb_flags & ~ (1<<MD_SB_CHANGE_PENDING)) || |
1da177e4 | 9241 | test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
fca4d848 | 9242 | test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
31a59e34 | 9243 | (mddev->external == 0 && mddev->safemode == 1) || |
4ad23a97 | 9244 | (mddev->safemode == 2 |
fca4d848 | 9245 | && !mddev->in_sync && mddev->recovery_cp == MaxSector) |
1da177e4 LT |
9246 | )) |
9247 | return; | |
fca4d848 | 9248 | |
df5b89b3 | 9249 | if (mddev_trylock(mddev)) { |
b4c4c7b8 | 9250 | int spares = 0; |
480523fe | 9251 | bool try_set_sync = mddev->safemode != 0; |
fca4d848 | 9252 | |
afc1f55c | 9253 | if (!mddev->external && mddev->safemode == 1) |
33182d15 N |
9254 | mddev->safemode = 0; |
9255 | ||
c89a8eee | 9256 | if (mddev->ro) { |
ab16bfc7 NB |
9257 | struct md_rdev *rdev; |
9258 | if (!mddev->external && mddev->in_sync) | |
9259 | /* 'Blocked' flag not needed as failed devices | |
9260 | * will be recorded if array switched to read/write. | |
9261 | * Leaving it set will prevent the device | |
9262 | * from being removed. | |
9263 | */ | |
9264 | rdev_for_each(rdev, mddev) | |
9265 | clear_bit(Blocked, &rdev->flags); | |
7ceb17e8 N |
9266 | /* On a read-only array we can: |
9267 | * - remove failed devices | |
9268 | * - add already-in_sync devices if the array itself | |
9269 | * is in-sync. | |
9270 | * As we only add devices that are already in-sync, | |
9271 | * we can activate the spares immediately. | |
c89a8eee | 9272 | */ |
7ceb17e8 | 9273 | remove_and_add_spares(mddev, NULL); |
8313b8e5 N |
9274 | /* There is no thread, but we need to call |
9275 | * ->spare_active and clear saved_raid_disk | |
9276 | */ | |
2ac295a5 | 9277 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8313b8e5 | 9278 | md_reap_sync_thread(mddev); |
a4a3d26d | 9279 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
8313b8e5 | 9280 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
2953079c | 9281 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
c89a8eee N |
9282 | goto unlock; |
9283 | } | |
9284 | ||
659b254f GJ |
9285 | if (mddev_is_clustered(mddev)) { |
9286 | struct md_rdev *rdev; | |
9287 | /* kick the device if another node issued a | |
9288 | * remove disk. | |
9289 | */ | |
9290 | rdev_for_each(rdev, mddev) { | |
9291 | if (test_and_clear_bit(ClusterRemove, &rdev->flags) && | |
9292 | rdev->raid_disk < 0) | |
9293 | md_kick_rdev_from_array(rdev); | |
9294 | } | |
9295 | } | |
9296 | ||
480523fe | 9297 | if (try_set_sync && !mddev->external && !mddev->in_sync) { |
85572d7c | 9298 | spin_lock(&mddev->lock); |
6497709b | 9299 | set_in_sync(mddev); |
85572d7c | 9300 | spin_unlock(&mddev->lock); |
fca4d848 | 9301 | } |
fca4d848 | 9302 | |
2953079c | 9303 | if (mddev->sb_flags) |
850b2b42 | 9304 | md_update_sb(mddev, 0); |
06d91a5f | 9305 | |
1da177e4 LT |
9306 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
9307 | !test_bit(MD_RECOVERY_DONE, &mddev->recovery)) { | |
9308 | /* resync/recovery still happening */ | |
9309 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9310 | goto unlock; | |
9311 | } | |
9312 | if (mddev->sync_thread) { | |
a91d5ac0 | 9313 | md_reap_sync_thread(mddev); |
1da177e4 LT |
9314 | goto unlock; |
9315 | } | |
72a23c21 NB |
9316 | /* Set RUNNING before clearing NEEDED to avoid |
9317 | * any transients in the value of "sync_action". | |
9318 | */ | |
72f36d59 | 9319 | mddev->curr_resync_completed = 0; |
23da422b | 9320 | spin_lock(&mddev->lock); |
72a23c21 | 9321 | set_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
23da422b | 9322 | spin_unlock(&mddev->lock); |
24dd469d N |
9323 | /* Clear some bits that don't mean anything, but |
9324 | * might be left set | |
9325 | */ | |
24dd469d N |
9326 | clear_bit(MD_RECOVERY_INTR, &mddev->recovery); |
9327 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); | |
1da177e4 | 9328 | |
ed209584 N |
9329 | if (!test_and_clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
9330 | test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) | |
ac05f256 | 9331 | goto not_running; |
1da177e4 LT |
9332 | /* no recovery is running. |
9333 | * remove any failed drives, then | |
9334 | * add spares if possible. | |
72f36d59 | 9335 | * Spares are also removed and re-added, to allow |
1da177e4 LT |
9336 | * the personality to fail the re-add. |
9337 | */ | |
1da177e4 | 9338 | |
b4c4c7b8 | 9339 | if (mddev->reshape_position != MaxSector) { |
50ac168a N |
9340 | if (mddev->pers->check_reshape == NULL || |
9341 | mddev->pers->check_reshape(mddev) != 0) | |
b4c4c7b8 | 9342 | /* Cannot proceed */ |
ac05f256 | 9343 | goto not_running; |
b4c4c7b8 | 9344 | set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); |
72a23c21 | 9345 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
746d3207 | 9346 | } else if ((spares = remove_and_add_spares(mddev, NULL))) { |
24dd469d N |
9347 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9348 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
56ac36d7 | 9349 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
72a23c21 | 9350 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9351 | } else if (mddev->recovery_cp < MaxSector) { |
9352 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
72a23c21 | 9353 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9354 | } else if (!test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) |
9355 | /* nothing to be done ... */ | |
ac05f256 | 9356 | goto not_running; |
24dd469d | 9357 | |
1da177e4 | 9358 | if (mddev->pers->sync_request) { |
ef99bf48 | 9359 | if (spares) { |
a654b9d8 N |
9360 | /* We are adding a device or devices to an array |
9361 | * which has the bitmap stored on all devices. | |
9362 | * So make sure all bitmap pages get written | |
9363 | */ | |
e64e4018 | 9364 | md_bitmap_write_all(mddev->bitmap); |
a654b9d8 | 9365 | } |
ac05f256 N |
9366 | INIT_WORK(&mddev->del_work, md_start_sync); |
9367 | queue_work(md_misc_wq, &mddev->del_work); | |
9368 | goto unlock; | |
1da177e4 | 9369 | } |
ac05f256 | 9370 | not_running: |
72a23c21 NB |
9371 | if (!mddev->sync_thread) { |
9372 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 9373 | wake_up(&resync_wait); |
72a23c21 NB |
9374 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
9375 | &mddev->recovery)) | |
0c3573f1 | 9376 | if (mddev->sysfs_action) |
00bcb4ac | 9377 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
72a23c21 | 9378 | } |
ac05f256 N |
9379 | unlock: |
9380 | wake_up(&mddev->sb_wait); | |
1da177e4 LT |
9381 | mddev_unlock(mddev); |
9382 | } | |
9383 | } | |
6c144d31 | 9384 | EXPORT_SYMBOL(md_check_recovery); |
1da177e4 | 9385 | |
a91d5ac0 JB |
9386 | void md_reap_sync_thread(struct mddev *mddev) |
9387 | { | |
9388 | struct md_rdev *rdev; | |
aefb2e5f GJ |
9389 | sector_t old_dev_sectors = mddev->dev_sectors; |
9390 | bool is_reshaped = false; | |
a91d5ac0 JB |
9391 | |
9392 | /* resync has finished, collect result */ | |
9393 | md_unregister_thread(&mddev->sync_thread); | |
9394 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
0d8ed0e9 GJ |
9395 | !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery) && |
9396 | mddev->degraded != mddev->raid_disks) { | |
a91d5ac0 JB |
9397 | /* success...*/ |
9398 | /* activate any spares */ | |
9399 | if (mddev->pers->spare_active(mddev)) { | |
e1a86dbb | 9400 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
2953079c | 9401 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a91d5ac0 JB |
9402 | } |
9403 | } | |
9404 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
aefb2e5f | 9405 | mddev->pers->finish_reshape) { |
a91d5ac0 | 9406 | mddev->pers->finish_reshape(mddev); |
aefb2e5f GJ |
9407 | if (mddev_is_clustered(mddev)) |
9408 | is_reshaped = true; | |
9409 | } | |
a91d5ac0 JB |
9410 | |
9411 | /* If array is no-longer degraded, then any saved_raid_disk | |
f466722c | 9412 | * information must be scrapped. |
a91d5ac0 | 9413 | */ |
f466722c N |
9414 | if (!mddev->degraded) |
9415 | rdev_for_each(rdev, mddev) | |
a91d5ac0 JB |
9416 | rdev->saved_raid_disk = -1; |
9417 | ||
9418 | md_update_sb(mddev, 1); | |
2953079c | 9419 | /* MD_SB_CHANGE_PENDING should be cleared by md_update_sb, so we can |
bb8bf15b GJ |
9420 | * call resync_finish here if MD_CLUSTER_RESYNC_LOCKED is set by |
9421 | * clustered raid */ | |
9422 | if (test_and_clear_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags)) | |
9423 | md_cluster_ops->resync_finish(mddev); | |
a91d5ac0 | 9424 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
ea358cd0 | 9425 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); |
a91d5ac0 JB |
9426 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9427 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9428 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9429 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
aefb2e5f GJ |
9430 | /* |
9431 | * We call md_cluster_ops->update_size here because sync_size could | |
9432 | * be changed by md_update_sb, and MD_RECOVERY_RESHAPE is cleared, | |
9433 | * so it is time to update size across cluster. | |
9434 | */ | |
9435 | if (mddev_is_clustered(mddev) && is_reshaped | |
9436 | && !test_bit(MD_CLOSING, &mddev->flags)) | |
9437 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
f851b60d | 9438 | wake_up(&resync_wait); |
a91d5ac0 JB |
9439 | /* flag recovery needed just to double check */ |
9440 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9441 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9442 | md_new_event(mddev); | |
9443 | if (mddev->event_work.func) | |
9444 | queue_work(md_misc_wq, &mddev->event_work); | |
9445 | } | |
6c144d31 | 9446 | EXPORT_SYMBOL(md_reap_sync_thread); |
a91d5ac0 | 9447 | |
fd01b88c | 9448 | void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev) |
6bfe0b49 | 9449 | { |
00bcb4ac | 9450 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
6bfe0b49 | 9451 | wait_event_timeout(rdev->blocked_wait, |
de393cde N |
9452 | !test_bit(Blocked, &rdev->flags) && |
9453 | !test_bit(BlockedBadBlocks, &rdev->flags), | |
6bfe0b49 DW |
9454 | msecs_to_jiffies(5000)); |
9455 | rdev_dec_pending(rdev, mddev); | |
9456 | } | |
9457 | EXPORT_SYMBOL(md_wait_for_blocked_rdev); | |
9458 | ||
c6563a8c N |
9459 | void md_finish_reshape(struct mddev *mddev) |
9460 | { | |
9461 | /* called be personality module when reshape completes. */ | |
9462 | struct md_rdev *rdev; | |
9463 | ||
9464 | rdev_for_each(rdev, mddev) { | |
9465 | if (rdev->data_offset > rdev->new_data_offset) | |
9466 | rdev->sectors += rdev->data_offset - rdev->new_data_offset; | |
9467 | else | |
9468 | rdev->sectors -= rdev->new_data_offset - rdev->data_offset; | |
9469 | rdev->data_offset = rdev->new_data_offset; | |
9470 | } | |
9471 | } | |
9472 | EXPORT_SYMBOL(md_finish_reshape); | |
2230dfe4 | 9473 | |
fc974ee2 | 9474 | /* Bad block management */ |
2230dfe4 | 9475 | |
fc974ee2 | 9476 | /* Returns 1 on success, 0 on failure */ |
3cb03002 | 9477 | int rdev_set_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
c6563a8c | 9478 | int is_new) |
2230dfe4 | 9479 | { |
85ad1d13 | 9480 | struct mddev *mddev = rdev->mddev; |
c6563a8c N |
9481 | int rv; |
9482 | if (is_new) | |
9483 | s += rdev->new_data_offset; | |
9484 | else | |
9485 | s += rdev->data_offset; | |
fc974ee2 VV |
9486 | rv = badblocks_set(&rdev->badblocks, s, sectors, 0); |
9487 | if (rv == 0) { | |
2230dfe4 | 9488 | /* Make sure they get written out promptly */ |
35b785f7 | 9489 | if (test_bit(ExternalBbl, &rdev->flags)) |
e1a86dbb | 9490 | sysfs_notify_dirent_safe(rdev->sysfs_unack_badblocks); |
8bd2f0a0 | 9491 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
2953079c SL |
9492 | set_mask_bits(&mddev->sb_flags, 0, |
9493 | BIT(MD_SB_CHANGE_CLEAN) | BIT(MD_SB_CHANGE_PENDING)); | |
2230dfe4 | 9494 | md_wakeup_thread(rdev->mddev->thread); |
fc974ee2 VV |
9495 | return 1; |
9496 | } else | |
9497 | return 0; | |
2230dfe4 N |
9498 | } |
9499 | EXPORT_SYMBOL_GPL(rdev_set_badblocks); | |
9500 | ||
c6563a8c N |
9501 | int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
9502 | int is_new) | |
2230dfe4 | 9503 | { |
35b785f7 | 9504 | int rv; |
c6563a8c N |
9505 | if (is_new) |
9506 | s += rdev->new_data_offset; | |
9507 | else | |
9508 | s += rdev->data_offset; | |
35b785f7 TM |
9509 | rv = badblocks_clear(&rdev->badblocks, s, sectors); |
9510 | if ((rv == 0) && test_bit(ExternalBbl, &rdev->flags)) | |
e1a86dbb | 9511 | sysfs_notify_dirent_safe(rdev->sysfs_badblocks); |
35b785f7 | 9512 | return rv; |
2230dfe4 N |
9513 | } |
9514 | EXPORT_SYMBOL_GPL(rdev_clear_badblocks); | |
9515 | ||
75c96f85 AB |
9516 | static int md_notify_reboot(struct notifier_block *this, |
9517 | unsigned long code, void *x) | |
1da177e4 LT |
9518 | { |
9519 | struct list_head *tmp; | |
fd01b88c | 9520 | struct mddev *mddev; |
2dba6a91 | 9521 | int need_delay = 0; |
1da177e4 | 9522 | |
c744a65c N |
9523 | for_each_mddev(mddev, tmp) { |
9524 | if (mddev_trylock(mddev)) { | |
30b8aa91 N |
9525 | if (mddev->pers) |
9526 | __md_stop_writes(mddev); | |
0f62fb22 N |
9527 | if (mddev->persistent) |
9528 | mddev->safemode = 2; | |
c744a65c | 9529 | mddev_unlock(mddev); |
2dba6a91 | 9530 | } |
c744a65c | 9531 | need_delay = 1; |
1da177e4 | 9532 | } |
c744a65c N |
9533 | /* |
9534 | * certain more exotic SCSI devices are known to be | |
9535 | * volatile wrt too early system reboots. While the | |
9536 | * right place to handle this issue is the given | |
9537 | * driver, we do want to have a safe RAID driver ... | |
9538 | */ | |
9539 | if (need_delay) | |
9540 | mdelay(1000*1); | |
9541 | ||
1da177e4 LT |
9542 | return NOTIFY_DONE; |
9543 | } | |
9544 | ||
75c96f85 | 9545 | static struct notifier_block md_notifier = { |
1da177e4 LT |
9546 | .notifier_call = md_notify_reboot, |
9547 | .next = NULL, | |
9548 | .priority = INT_MAX, /* before any real devices */ | |
9549 | }; | |
9550 | ||
9551 | static void md_geninit(void) | |
9552 | { | |
36a4e1fe | 9553 | pr_debug("md: sizeof(mdp_super_t) = %d\n", (int)sizeof(mdp_super_t)); |
1da177e4 | 9554 | |
97a32539 | 9555 | proc_create("mdstat", S_IRUGO, NULL, &mdstat_proc_ops); |
1da177e4 LT |
9556 | } |
9557 | ||
75c96f85 | 9558 | static int __init md_init(void) |
1da177e4 | 9559 | { |
e804ac78 TH |
9560 | int ret = -ENOMEM; |
9561 | ||
ada609ee | 9562 | md_wq = alloc_workqueue("md", WQ_MEM_RECLAIM, 0); |
e804ac78 TH |
9563 | if (!md_wq) |
9564 | goto err_wq; | |
9565 | ||
9566 | md_misc_wq = alloc_workqueue("md_misc", 0, 0); | |
9567 | if (!md_misc_wq) | |
9568 | goto err_misc_wq; | |
9569 | ||
cc1ffe61 | 9570 | md_rdev_misc_wq = alloc_workqueue("md_rdev_misc", 0, 0); |
cf0b9b48 | 9571 | if (!md_rdev_misc_wq) |
cc1ffe61 GJ |
9572 | goto err_rdev_misc_wq; |
9573 | ||
28144f99 CH |
9574 | ret = __register_blkdev(MD_MAJOR, "md", md_probe); |
9575 | if (ret < 0) | |
e804ac78 TH |
9576 | goto err_md; |
9577 | ||
28144f99 CH |
9578 | ret = __register_blkdev(0, "mdp", md_probe); |
9579 | if (ret < 0) | |
e804ac78 TH |
9580 | goto err_mdp; |
9581 | mdp_major = ret; | |
9582 | ||
1da177e4 | 9583 | register_reboot_notifier(&md_notifier); |
0b4d4147 | 9584 | raid_table_header = register_sysctl_table(raid_root_table); |
1da177e4 LT |
9585 | |
9586 | md_geninit(); | |
d710e138 | 9587 | return 0; |
1da177e4 | 9588 | |
e804ac78 TH |
9589 | err_mdp: |
9590 | unregister_blkdev(MD_MAJOR, "md"); | |
9591 | err_md: | |
cc1ffe61 GJ |
9592 | destroy_workqueue(md_rdev_misc_wq); |
9593 | err_rdev_misc_wq: | |
e804ac78 TH |
9594 | destroy_workqueue(md_misc_wq); |
9595 | err_misc_wq: | |
9596 | destroy_workqueue(md_wq); | |
9597 | err_wq: | |
9598 | return ret; | |
9599 | } | |
1da177e4 | 9600 | |
70bcecdb | 9601 | static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev) |
1d7e3e96 | 9602 | { |
70bcecdb GR |
9603 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
9604 | struct md_rdev *rdev2; | |
9605 | int role, ret; | |
9606 | char b[BDEVNAME_SIZE]; | |
1d7e3e96 | 9607 | |
818da59f GJ |
9608 | /* |
9609 | * If size is changed in another node then we need to | |
9610 | * do resize as well. | |
9611 | */ | |
9612 | if (mddev->dev_sectors != le64_to_cpu(sb->size)) { | |
9613 | ret = mddev->pers->resize(mddev, le64_to_cpu(sb->size)); | |
9614 | if (ret) | |
9615 | pr_info("md-cluster: resize failed\n"); | |
9616 | else | |
e64e4018 | 9617 | md_bitmap_update_sb(mddev->bitmap); |
818da59f GJ |
9618 | } |
9619 | ||
70bcecdb GR |
9620 | /* Check for change of roles in the active devices */ |
9621 | rdev_for_each(rdev2, mddev) { | |
9622 | if (test_bit(Faulty, &rdev2->flags)) | |
9623 | continue; | |
9624 | ||
9625 | /* Check if the roles changed */ | |
9626 | role = le16_to_cpu(sb->dev_roles[rdev2->desc_nr]); | |
dbb64f86 GR |
9627 | |
9628 | if (test_bit(Candidate, &rdev2->flags)) { | |
9629 | if (role == 0xfffe) { | |
9630 | pr_info("md: Removing Candidate device %s because add failed\n", bdevname(rdev2->bdev,b)); | |
9631 | md_kick_rdev_from_array(rdev2); | |
9632 | continue; | |
9633 | } | |
9634 | else | |
9635 | clear_bit(Candidate, &rdev2->flags); | |
9636 | } | |
9637 | ||
70bcecdb | 9638 | if (role != rdev2->raid_disk) { |
ca1e98e0 GJ |
9639 | /* |
9640 | * got activated except reshape is happening. | |
9641 | */ | |
9642 | if (rdev2->raid_disk == -1 && role != 0xffff && | |
9643 | !(le32_to_cpu(sb->feature_map) & | |
9644 | MD_FEATURE_RESHAPE_ACTIVE)) { | |
70bcecdb GR |
9645 | rdev2->saved_raid_disk = role; |
9646 | ret = remove_and_add_spares(mddev, rdev2); | |
9647 | pr_info("Activated spare: %s\n", | |
9d48739e | 9648 | bdevname(rdev2->bdev,b)); |
a578183e GJ |
9649 | /* wakeup mddev->thread here, so array could |
9650 | * perform resync with the new activated disk */ | |
9651 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9652 | md_wakeup_thread(mddev->thread); | |
70bcecdb GR |
9653 | } |
9654 | /* device faulty | |
9655 | * We just want to do the minimum to mark the disk | |
9656 | * as faulty. The recovery is performed by the | |
9657 | * one who initiated the error. | |
9658 | */ | |
9659 | if ((role == 0xfffe) || (role == 0xfffd)) { | |
9660 | md_error(mddev, rdev2); | |
9661 | clear_bit(Blocked, &rdev2->flags); | |
9662 | } | |
9663 | } | |
1d7e3e96 | 9664 | } |
70bcecdb | 9665 | |
28c1b9fd GR |
9666 | if (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) |
9667 | update_raid_disks(mddev, le32_to_cpu(sb->raid_disks)); | |
70bcecdb | 9668 | |
7564beda GJ |
9669 | /* |
9670 | * Since mddev->delta_disks has already updated in update_raid_disks, | |
9671 | * so it is time to check reshape. | |
9672 | */ | |
9673 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9674 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9675 | /* | |
9676 | * reshape is happening in the remote node, we need to | |
9677 | * update reshape_position and call start_reshape. | |
9678 | */ | |
ed4d0a4e | 9679 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); |
7564beda GJ |
9680 | if (mddev->pers->update_reshape_pos) |
9681 | mddev->pers->update_reshape_pos(mddev); | |
9682 | if (mddev->pers->start_reshape) | |
9683 | mddev->pers->start_reshape(mddev); | |
9684 | } else if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9685 | mddev->reshape_position != MaxSector && | |
9686 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9687 | /* reshape is just done in another node. */ | |
9688 | mddev->reshape_position = MaxSector; | |
9689 | if (mddev->pers->update_reshape_pos) | |
9690 | mddev->pers->update_reshape_pos(mddev); | |
9691 | } | |
9692 | ||
70bcecdb GR |
9693 | /* Finally set the event to be up to date */ |
9694 | mddev->events = le64_to_cpu(sb->events); | |
9695 | } | |
9696 | ||
9697 | static int read_rdev(struct mddev *mddev, struct md_rdev *rdev) | |
9698 | { | |
9699 | int err; | |
9700 | struct page *swapout = rdev->sb_page; | |
9701 | struct mdp_superblock_1 *sb; | |
9702 | ||
9703 | /* Store the sb page of the rdev in the swapout temporary | |
9704 | * variable in case we err in the future | |
9705 | */ | |
9706 | rdev->sb_page = NULL; | |
7f0f0d87 N |
9707 | err = alloc_disk_sb(rdev); |
9708 | if (err == 0) { | |
9709 | ClearPageUptodate(rdev->sb_page); | |
9710 | rdev->sb_loaded = 0; | |
9711 | err = super_types[mddev->major_version]. | |
9712 | load_super(rdev, NULL, mddev->minor_version); | |
9713 | } | |
70bcecdb GR |
9714 | if (err < 0) { |
9715 | pr_warn("%s: %d Could not reload rdev(%d) err: %d. Restoring old values\n", | |
9716 | __func__, __LINE__, rdev->desc_nr, err); | |
7f0f0d87 N |
9717 | if (rdev->sb_page) |
9718 | put_page(rdev->sb_page); | |
70bcecdb GR |
9719 | rdev->sb_page = swapout; |
9720 | rdev->sb_loaded = 1; | |
9721 | return err; | |
1d7e3e96 GR |
9722 | } |
9723 | ||
70bcecdb GR |
9724 | sb = page_address(rdev->sb_page); |
9725 | /* Read the offset unconditionally, even if MD_FEATURE_RECOVERY_OFFSET | |
9726 | * is not set | |
9727 | */ | |
9728 | ||
9729 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)) | |
9730 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); | |
9731 | ||
9732 | /* The other node finished recovery, call spare_active to set | |
9733 | * device In_sync and mddev->degraded | |
9734 | */ | |
9735 | if (rdev->recovery_offset == MaxSector && | |
9736 | !test_bit(In_sync, &rdev->flags) && | |
9737 | mddev->pers->spare_active(mddev)) | |
e1a86dbb | 9738 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
70bcecdb GR |
9739 | |
9740 | put_page(swapout); | |
9741 | return 0; | |
9742 | } | |
9743 | ||
9744 | void md_reload_sb(struct mddev *mddev, int nr) | |
9745 | { | |
9746 | struct md_rdev *rdev; | |
9747 | int err; | |
9748 | ||
9749 | /* Find the rdev */ | |
9750 | rdev_for_each_rcu(rdev, mddev) { | |
9751 | if (rdev->desc_nr == nr) | |
9752 | break; | |
9753 | } | |
9754 | ||
9755 | if (!rdev || rdev->desc_nr != nr) { | |
9756 | pr_warn("%s: %d Could not find rdev with nr %d\n", __func__, __LINE__, nr); | |
9757 | return; | |
9758 | } | |
9759 | ||
9760 | err = read_rdev(mddev, rdev); | |
9761 | if (err < 0) | |
9762 | return; | |
9763 | ||
9764 | check_sb_changes(mddev, rdev); | |
9765 | ||
9766 | /* Read all rdev's to update recovery_offset */ | |
0ea9924a GJ |
9767 | rdev_for_each_rcu(rdev, mddev) { |
9768 | if (!test_bit(Faulty, &rdev->flags)) | |
9769 | read_rdev(mddev, rdev); | |
9770 | } | |
1d7e3e96 GR |
9771 | } |
9772 | EXPORT_SYMBOL(md_reload_sb); | |
9773 | ||
1da177e4 LT |
9774 | #ifndef MODULE |
9775 | ||
9776 | /* | |
9777 | * Searches all registered partitions for autorun RAID arrays | |
9778 | * at boot time. | |
9779 | */ | |
4d936ec1 | 9780 | |
5b1f5bc3 | 9781 | static DEFINE_MUTEX(detected_devices_mutex); |
4d936ec1 ME |
9782 | static LIST_HEAD(all_detected_devices); |
9783 | struct detected_devices_node { | |
9784 | struct list_head list; | |
9785 | dev_t dev; | |
9786 | }; | |
1da177e4 LT |
9787 | |
9788 | void md_autodetect_dev(dev_t dev) | |
9789 | { | |
4d936ec1 ME |
9790 | struct detected_devices_node *node_detected_dev; |
9791 | ||
9792 | node_detected_dev = kzalloc(sizeof(*node_detected_dev), GFP_KERNEL); | |
9793 | if (node_detected_dev) { | |
9794 | node_detected_dev->dev = dev; | |
5b1f5bc3 | 9795 | mutex_lock(&detected_devices_mutex); |
4d936ec1 | 9796 | list_add_tail(&node_detected_dev->list, &all_detected_devices); |
5b1f5bc3 | 9797 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9798 | } |
1da177e4 LT |
9799 | } |
9800 | ||
d82fa81c | 9801 | void md_autostart_arrays(int part) |
1da177e4 | 9802 | { |
3cb03002 | 9803 | struct md_rdev *rdev; |
4d936ec1 ME |
9804 | struct detected_devices_node *node_detected_dev; |
9805 | dev_t dev; | |
9806 | int i_scanned, i_passed; | |
1da177e4 | 9807 | |
4d936ec1 ME |
9808 | i_scanned = 0; |
9809 | i_passed = 0; | |
1da177e4 | 9810 | |
9d48739e | 9811 | pr_info("md: Autodetecting RAID arrays.\n"); |
1da177e4 | 9812 | |
5b1f5bc3 | 9813 | mutex_lock(&detected_devices_mutex); |
4d936ec1 ME |
9814 | while (!list_empty(&all_detected_devices) && i_scanned < INT_MAX) { |
9815 | i_scanned++; | |
9816 | node_detected_dev = list_entry(all_detected_devices.next, | |
9817 | struct detected_devices_node, list); | |
9818 | list_del(&node_detected_dev->list); | |
9819 | dev = node_detected_dev->dev; | |
9820 | kfree(node_detected_dev); | |
90bcf133 | 9821 | mutex_unlock(&detected_devices_mutex); |
df968c4e | 9822 | rdev = md_import_device(dev,0, 90); |
90bcf133 | 9823 | mutex_lock(&detected_devices_mutex); |
1da177e4 LT |
9824 | if (IS_ERR(rdev)) |
9825 | continue; | |
9826 | ||
403df478 | 9827 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 9828 | continue; |
403df478 | 9829 | |
d0fae18f | 9830 | set_bit(AutoDetected, &rdev->flags); |
1da177e4 | 9831 | list_add(&rdev->same_set, &pending_raid_disks); |
4d936ec1 | 9832 | i_passed++; |
1da177e4 | 9833 | } |
5b1f5bc3 | 9834 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9835 | |
9d48739e | 9836 | pr_debug("md: Scanned %d and added %d devices.\n", i_scanned, i_passed); |
1da177e4 LT |
9837 | |
9838 | autorun_devices(part); | |
9839 | } | |
9840 | ||
fdee8ae4 | 9841 | #endif /* !MODULE */ |
1da177e4 LT |
9842 | |
9843 | static __exit void md_exit(void) | |
9844 | { | |
fd01b88c | 9845 | struct mddev *mddev; |
1da177e4 | 9846 | struct list_head *tmp; |
e2f23b60 | 9847 | int delay = 1; |
8ab5e4c1 | 9848 | |
3dbd8c2e | 9849 | unregister_blkdev(MD_MAJOR,"md"); |
1da177e4 LT |
9850 | unregister_blkdev(mdp_major, "mdp"); |
9851 | unregister_reboot_notifier(&md_notifier); | |
9852 | unregister_sysctl_table(raid_table_header); | |
e2f23b60 N |
9853 | |
9854 | /* We cannot unload the modules while some process is | |
9855 | * waiting for us in select() or poll() - wake them up | |
9856 | */ | |
9857 | md_unloading = 1; | |
9858 | while (waitqueue_active(&md_event_waiters)) { | |
9859 | /* not safe to leave yet */ | |
9860 | wake_up(&md_event_waiters); | |
9861 | msleep(delay); | |
9862 | delay += delay; | |
9863 | } | |
1da177e4 | 9864 | remove_proc_entry("mdstat", NULL); |
e2f23b60 | 9865 | |
29ac4aa3 | 9866 | for_each_mddev(mddev, tmp) { |
1da177e4 | 9867 | export_array(mddev); |
9356863c | 9868 | mddev->ctime = 0; |
d3374825 | 9869 | mddev->hold_active = 0; |
9356863c N |
9870 | /* |
9871 | * for_each_mddev() will call mddev_put() at the end of each | |
9872 | * iteration. As the mddev is now fully clear, this will | |
9873 | * schedule the mddev for destruction by a workqueue, and the | |
9874 | * destroy_workqueue() below will wait for that to complete. | |
9875 | */ | |
1da177e4 | 9876 | } |
cc1ffe61 | 9877 | destroy_workqueue(md_rdev_misc_wq); |
e804ac78 TH |
9878 | destroy_workqueue(md_misc_wq); |
9879 | destroy_workqueue(md_wq); | |
1da177e4 LT |
9880 | } |
9881 | ||
685784aa | 9882 | subsys_initcall(md_init); |
1da177e4 LT |
9883 | module_exit(md_exit) |
9884 | ||
e4dca7b7 | 9885 | static int get_ro(char *buffer, const struct kernel_param *kp) |
f91de92e | 9886 | { |
3f99980c | 9887 | return sprintf(buffer, "%d\n", start_readonly); |
f91de92e | 9888 | } |
e4dca7b7 | 9889 | static int set_ro(const char *val, const struct kernel_param *kp) |
f91de92e | 9890 | { |
4c9309c0 | 9891 | return kstrtouint(val, 10, (unsigned int *)&start_readonly); |
f91de92e N |
9892 | } |
9893 | ||
80ca3a44 N |
9894 | module_param_call(start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR); |
9895 | module_param(start_dirty_degraded, int, S_IRUGO|S_IWUSR); | |
efeb53c0 | 9896 | module_param_call(new_array, add_named_array, NULL, NULL, S_IWUSR); |
78b6350d | 9897 | module_param(create_on_open, bool, S_IRUSR|S_IWUSR); |
f91de92e | 9898 | |
1da177e4 | 9899 | MODULE_LICENSE("GPL"); |
0efb9e61 | 9900 | MODULE_DESCRIPTION("MD RAID framework"); |
aa1595e9 | 9901 | MODULE_ALIAS("md"); |
72008652 | 9902 | MODULE_ALIAS_BLOCKDEV_MAJOR(MD_MAJOR); |