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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 | ||
d7603b7e N |
343 | /* |
344 | * We have a system wide 'event count' that is incremented | |
345 | * on any 'interesting' event, and readers of /proc/mdstat | |
346 | * can use 'poll' or 'select' to find out when the event | |
347 | * count increases. | |
348 | * | |
349 | * Events are: | |
350 | * start array, stop array, error, add device, remove device, | |
351 | * start build, activate spare | |
352 | */ | |
2989ddbd | 353 | static DECLARE_WAIT_QUEUE_HEAD(md_event_waiters); |
d7603b7e | 354 | static atomic_t md_event_count; |
fd01b88c | 355 | void md_new_event(struct mddev *mddev) |
d7603b7e N |
356 | { |
357 | atomic_inc(&md_event_count); | |
358 | wake_up(&md_event_waiters); | |
359 | } | |
29269553 | 360 | EXPORT_SYMBOL_GPL(md_new_event); |
d7603b7e | 361 | |
1da177e4 LT |
362 | /* |
363 | * Enables to iterate over all existing md arrays | |
364 | * all_mddevs_lock protects this list. | |
365 | */ | |
366 | static LIST_HEAD(all_mddevs); | |
367 | static DEFINE_SPINLOCK(all_mddevs_lock); | |
368 | ||
1da177e4 LT |
369 | /* |
370 | * iterates through all used mddevs in the system. | |
371 | * We take care to grab the all_mddevs_lock whenever navigating | |
372 | * the list, and to always hold a refcount when unlocked. | |
373 | * Any code which breaks out of this loop while own | |
374 | * a reference to the current mddev and must mddev_put it. | |
375 | */ | |
fd01b88c | 376 | #define for_each_mddev(_mddev,_tmp) \ |
1da177e4 | 377 | \ |
f72ffdd6 | 378 | for (({ spin_lock(&all_mddevs_lock); \ |
fd01b88c N |
379 | _tmp = all_mddevs.next; \ |
380 | _mddev = NULL;}); \ | |
381 | ({ if (_tmp != &all_mddevs) \ | |
382 | mddev_get(list_entry(_tmp, struct mddev, all_mddevs));\ | |
1da177e4 | 383 | spin_unlock(&all_mddevs_lock); \ |
fd01b88c N |
384 | if (_mddev) mddev_put(_mddev); \ |
385 | _mddev = list_entry(_tmp, struct mddev, all_mddevs); \ | |
386 | _tmp != &all_mddevs;}); \ | |
1da177e4 | 387 | ({ spin_lock(&all_mddevs_lock); \ |
fd01b88c | 388 | _tmp = _tmp->next;}) \ |
1da177e4 LT |
389 | ) |
390 | ||
409c57f3 N |
391 | /* Rather than calling directly into the personality make_request function, |
392 | * IO requests come here first so that we can check if the device is | |
393 | * being suspended pending a reconfiguration. | |
394 | * We hold a refcount over the call to ->make_request. By the time that | |
395 | * call has finished, the bio has been linked into some internal structure | |
396 | * and so is visible to ->quiesce(), so we don't need the refcount any more. | |
397 | */ | |
b3143b9a N |
398 | static bool is_suspended(struct mddev *mddev, struct bio *bio) |
399 | { | |
400 | if (mddev->suspended) | |
401 | return true; | |
402 | if (bio_data_dir(bio) != WRITE) | |
403 | return false; | |
404 | if (mddev->suspend_lo >= mddev->suspend_hi) | |
405 | return false; | |
406 | if (bio->bi_iter.bi_sector >= mddev->suspend_hi) | |
407 | return false; | |
408 | if (bio_end_sector(bio) < mddev->suspend_lo) | |
409 | return false; | |
410 | return true; | |
411 | } | |
412 | ||
393debc2 SL |
413 | void md_handle_request(struct mddev *mddev, struct bio *bio) |
414 | { | |
415 | check_suspended: | |
416 | rcu_read_lock(); | |
b3143b9a | 417 | if (is_suspended(mddev, bio)) { |
393debc2 SL |
418 | DEFINE_WAIT(__wait); |
419 | for (;;) { | |
420 | prepare_to_wait(&mddev->sb_wait, &__wait, | |
421 | TASK_UNINTERRUPTIBLE); | |
b3143b9a | 422 | if (!is_suspended(mddev, bio)) |
393debc2 SL |
423 | break; |
424 | rcu_read_unlock(); | |
425 | schedule(); | |
426 | rcu_read_lock(); | |
427 | } | |
428 | finish_wait(&mddev->sb_wait, &__wait); | |
429 | } | |
430 | atomic_inc(&mddev->active_io); | |
431 | rcu_read_unlock(); | |
432 | ||
433 | if (!mddev->pers->make_request(mddev, bio)) { | |
434 | atomic_dec(&mddev->active_io); | |
435 | wake_up(&mddev->sb_wait); | |
436 | goto check_suspended; | |
437 | } | |
438 | ||
439 | if (atomic_dec_and_test(&mddev->active_io) && mddev->suspended) | |
440 | wake_up(&mddev->sb_wait); | |
441 | } | |
442 | EXPORT_SYMBOL(md_handle_request); | |
443 | ||
41d2d848 AP |
444 | struct md_io { |
445 | struct mddev *mddev; | |
446 | bio_end_io_t *orig_bi_end_io; | |
447 | void *orig_bi_private; | |
99dfc43e | 448 | struct block_device *orig_bi_bdev; |
41d2d848 AP |
449 | unsigned long start_time; |
450 | }; | |
451 | ||
452 | static void md_end_io(struct bio *bio) | |
453 | { | |
454 | struct md_io *md_io = bio->bi_private; | |
455 | struct mddev *mddev = md_io->mddev; | |
456 | ||
99dfc43e | 457 | bio_end_io_acct_remapped(bio, md_io->start_time, md_io->orig_bi_bdev); |
41d2d848 AP |
458 | |
459 | bio->bi_end_io = md_io->orig_bi_end_io; | |
460 | bio->bi_private = md_io->orig_bi_private; | |
461 | ||
462 | mempool_free(md_io, &mddev->md_io_pool); | |
463 | ||
464 | if (bio->bi_end_io) | |
465 | bio->bi_end_io(bio); | |
466 | } | |
467 | ||
c62b37d9 | 468 | static blk_qc_t md_submit_bio(struct bio *bio) |
1da177e4 | 469 | { |
49077326 | 470 | const int rw = bio_data_dir(bio); |
309dca30 | 471 | struct mddev *mddev = bio->bi_bdev->bd_disk->private_data; |
49077326 | 472 | |
9a5a8597 | 473 | if (mddev == NULL || mddev->pers == NULL) { |
62f7b198 GP |
474 | bio_io_error(bio); |
475 | return BLK_QC_T_NONE; | |
476 | } | |
477 | ||
9a5a8597 | 478 | if (unlikely(test_bit(MD_BROKEN, &mddev->flags)) && (rw == WRITE)) { |
409c57f3 | 479 | bio_io_error(bio); |
dece1635 | 480 | return BLK_QC_T_NONE; |
409c57f3 | 481 | } |
9a5a8597 CIK |
482 | |
483 | blk_queue_split(&bio); | |
484 | ||
bbfa57c0 | 485 | if (mddev->ro == 1 && unlikely(rw == WRITE)) { |
4246a0b6 | 486 | if (bio_sectors(bio) != 0) |
4e4cbee9 | 487 | bio->bi_status = BLK_STS_IOERR; |
4246a0b6 | 488 | bio_endio(bio); |
dece1635 | 489 | return BLK_QC_T_NONE; |
bbfa57c0 | 490 | } |
49077326 | 491 | |
41d2d848 AP |
492 | if (bio->bi_end_io != md_end_io) { |
493 | struct md_io *md_io; | |
494 | ||
495 | md_io = mempool_alloc(&mddev->md_io_pool, GFP_NOIO); | |
496 | md_io->mddev = mddev; | |
497 | md_io->orig_bi_end_io = bio->bi_end_io; | |
498 | md_io->orig_bi_private = bio->bi_private; | |
99dfc43e | 499 | md_io->orig_bi_bdev = bio->bi_bdev; |
41d2d848 AP |
500 | |
501 | bio->bi_end_io = md_end_io; | |
502 | bio->bi_private = md_io; | |
503 | ||
99dfc43e | 504 | md_io->start_time = bio_start_io_acct(bio); |
41d2d848 AP |
505 | } |
506 | ||
9c573de3 | 507 | /* bio could be mergeable after passing to underlayer */ |
1eff9d32 | 508 | bio->bi_opf &= ~REQ_NOMERGE; |
393debc2 SL |
509 | |
510 | md_handle_request(mddev, bio); | |
49077326 | 511 | |
dece1635 | 512 | return BLK_QC_T_NONE; |
409c57f3 N |
513 | } |
514 | ||
9e35b99c N |
515 | /* mddev_suspend makes sure no new requests are submitted |
516 | * to the device, and that any requests that have been submitted | |
517 | * are completely handled. | |
afa0f557 N |
518 | * Once mddev_detach() is called and completes, the module will be |
519 | * completely unused. | |
9e35b99c | 520 | */ |
fd01b88c | 521 | void mddev_suspend(struct mddev *mddev) |
409c57f3 | 522 | { |
092398dc | 523 | WARN_ON_ONCE(mddev->thread && current == mddev->thread->tsk); |
4d5324f7 | 524 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
525 | if (mddev->suspended++) |
526 | return; | |
409c57f3 | 527 | synchronize_rcu(); |
cc27b0c7 | 528 | wake_up(&mddev->sb_wait); |
35bfc521 N |
529 | set_bit(MD_ALLOW_SB_UPDATE, &mddev->flags); |
530 | smp_mb__after_atomic(); | |
409c57f3 N |
531 | wait_event(mddev->sb_wait, atomic_read(&mddev->active_io) == 0); |
532 | mddev->pers->quiesce(mddev, 1); | |
35bfc521 N |
533 | clear_bit_unlock(MD_ALLOW_SB_UPDATE, &mddev->flags); |
534 | wait_event(mddev->sb_wait, !test_bit(MD_UPDATING_SB, &mddev->flags)); | |
0d9f4f13 JB |
535 | |
536 | del_timer_sync(&mddev->safemode_timer); | |
78f57ef9 CL |
537 | /* restrict memory reclaim I/O during raid array is suspend */ |
538 | mddev->noio_flag = memalloc_noio_save(); | |
409c57f3 | 539 | } |
390ee602 | 540 | EXPORT_SYMBOL_GPL(mddev_suspend); |
409c57f3 | 541 | |
fd01b88c | 542 | void mddev_resume(struct mddev *mddev) |
409c57f3 | 543 | { |
78f57ef9 CL |
544 | /* entred the memalloc scope from mddev_suspend() */ |
545 | memalloc_noio_restore(mddev->noio_flag); | |
4d5324f7 | 546 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
547 | if (--mddev->suspended) |
548 | return; | |
409c57f3 N |
549 | wake_up(&mddev->sb_wait); |
550 | mddev->pers->quiesce(mddev, 0); | |
0fd018af | 551 | |
47525e59 | 552 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
0fd018af JB |
553 | md_wakeup_thread(mddev->thread); |
554 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
1da177e4 | 555 | } |
390ee602 | 556 | EXPORT_SYMBOL_GPL(mddev_resume); |
1da177e4 | 557 | |
a2826aa9 | 558 | /* |
e9c7469b | 559 | * Generic flush handling for md |
a2826aa9 N |
560 | */ |
561 | ||
4bc034d3 | 562 | static void md_end_flush(struct bio *bio) |
a2826aa9 | 563 | { |
4bc034d3 N |
564 | struct md_rdev *rdev = bio->bi_private; |
565 | struct mddev *mddev = rdev->mddev; | |
a2826aa9 N |
566 | |
567 | rdev_dec_pending(rdev, mddev); | |
568 | ||
4bc034d3 N |
569 | if (atomic_dec_and_test(&mddev->flush_pending)) { |
570 | /* The pre-request flush has finished */ | |
571 | queue_work(md_wq, &mddev->flush_work); | |
a2826aa9 | 572 | } |
4bc034d3 | 573 | bio_put(bio); |
5a409b4f | 574 | } |
a7a07e69 | 575 | |
4bc034d3 N |
576 | static void md_submit_flush_data(struct work_struct *ws); |
577 | ||
578 | static void submit_flushes(struct work_struct *ws) | |
a2826aa9 | 579 | { |
4bc034d3 | 580 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); |
3cb03002 | 581 | struct md_rdev *rdev; |
a2826aa9 | 582 | |
2bc13b83 | 583 | mddev->start_flush = ktime_get_boottime(); |
4bc034d3 N |
584 | INIT_WORK(&mddev->flush_work, md_submit_flush_data); |
585 | atomic_set(&mddev->flush_pending, 1); | |
a2826aa9 | 586 | rcu_read_lock(); |
dafb20fa | 587 | rdev_for_each_rcu(rdev, mddev) |
a2826aa9 N |
588 | if (rdev->raid_disk >= 0 && |
589 | !test_bit(Faulty, &rdev->flags)) { | |
590 | /* Take two references, one is dropped | |
591 | * when request finishes, one after | |
592 | * we reclaim rcu_read_lock | |
593 | */ | |
594 | struct bio *bi; | |
595 | atomic_inc(&rdev->nr_pending); | |
596 | atomic_inc(&rdev->nr_pending); | |
597 | rcu_read_unlock(); | |
a78f18da | 598 | bi = bio_alloc_bioset(GFP_NOIO, 0, &mddev->bio_set); |
5a409b4f | 599 | bi->bi_end_io = md_end_flush; |
4bc034d3 N |
600 | bi->bi_private = rdev; |
601 | bio_set_dev(bi, rdev->bdev); | |
70fd7614 | 602 | bi->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH; |
4bc034d3 | 603 | atomic_inc(&mddev->flush_pending); |
4e49ea4a | 604 | submit_bio(bi); |
a2826aa9 N |
605 | rcu_read_lock(); |
606 | rdev_dec_pending(rdev, mddev); | |
607 | } | |
608 | rcu_read_unlock(); | |
4bc034d3 N |
609 | if (atomic_dec_and_test(&mddev->flush_pending)) |
610 | queue_work(md_wq, &mddev->flush_work); | |
611 | } | |
a2826aa9 | 612 | |
4bc034d3 N |
613 | static void md_submit_flush_data(struct work_struct *ws) |
614 | { | |
615 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); | |
616 | struct bio *bio = mddev->flush_bio; | |
617 | ||
618 | /* | |
619 | * must reset flush_bio before calling into md_handle_request to avoid a | |
620 | * deadlock, because other bios passed md_handle_request suspend check | |
621 | * could wait for this and below md_handle_request could wait for those | |
622 | * bios because of suspend check | |
623 | */ | |
dc5d17a3 | 624 | spin_lock_irq(&mddev->lock); |
81ba3c24 | 625 | mddev->prev_flush_start = mddev->start_flush; |
4bc034d3 | 626 | mddev->flush_bio = NULL; |
dc5d17a3 | 627 | spin_unlock_irq(&mddev->lock); |
4bc034d3 N |
628 | wake_up(&mddev->sb_wait); |
629 | ||
630 | if (bio->bi_iter.bi_size == 0) { | |
631 | /* an empty barrier - all done */ | |
632 | bio_endio(bio); | |
633 | } else { | |
634 | bio->bi_opf &= ~REQ_PREFLUSH; | |
635 | md_handle_request(mddev, bio); | |
a2826aa9 | 636 | } |
a2826aa9 | 637 | } |
4bc034d3 | 638 | |
775d7831 DJ |
639 | /* |
640 | * Manages consolidation of flushes and submitting any flushes needed for | |
641 | * a bio with REQ_PREFLUSH. Returns true if the bio is finished or is | |
642 | * being finished in another context. Returns false if the flushing is | |
643 | * complete but still needs the I/O portion of the bio to be processed. | |
644 | */ | |
645 | bool md_flush_request(struct mddev *mddev, struct bio *bio) | |
4bc034d3 | 646 | { |
81ba3c24 | 647 | ktime_t req_start = ktime_get_boottime(); |
4bc034d3 | 648 | spin_lock_irq(&mddev->lock); |
204d1a64 PG |
649 | /* flush requests wait until ongoing flush completes, |
650 | * hence coalescing all the pending requests. | |
651 | */ | |
4bc034d3 | 652 | wait_event_lock_irq(mddev->sb_wait, |
2bc13b83 | 653 | !mddev->flush_bio || |
a23f2aae | 654 | ktime_before(req_start, mddev->prev_flush_start), |
4bc034d3 | 655 | mddev->lock); |
204d1a64 | 656 | /* new request after previous flush is completed */ |
a23f2aae | 657 | if (ktime_after(req_start, mddev->prev_flush_start)) { |
2bc13b83 N |
658 | WARN_ON(mddev->flush_bio); |
659 | mddev->flush_bio = bio; | |
660 | bio = NULL; | |
661 | } | |
4bc034d3 N |
662 | spin_unlock_irq(&mddev->lock); |
663 | ||
2bc13b83 N |
664 | if (!bio) { |
665 | INIT_WORK(&mddev->flush_work, submit_flushes); | |
666 | queue_work(md_wq, &mddev->flush_work); | |
667 | } else { | |
668 | /* flush was performed for some other bio while we waited. */ | |
669 | if (bio->bi_iter.bi_size == 0) | |
670 | /* an empty barrier - all done */ | |
671 | bio_endio(bio); | |
672 | else { | |
673 | bio->bi_opf &= ~REQ_PREFLUSH; | |
775d7831 | 674 | return false; |
2bc13b83 N |
675 | } |
676 | } | |
775d7831 | 677 | return true; |
4bc034d3 | 678 | } |
e9c7469b | 679 | EXPORT_SYMBOL(md_flush_request); |
409c57f3 | 680 | |
fd01b88c | 681 | static inline struct mddev *mddev_get(struct mddev *mddev) |
1da177e4 LT |
682 | { |
683 | atomic_inc(&mddev->active); | |
684 | return mddev; | |
685 | } | |
686 | ||
5fd3a17e | 687 | static void mddev_delayed_delete(struct work_struct *ws); |
d3374825 | 688 | |
fd01b88c | 689 | static void mddev_put(struct mddev *mddev) |
1da177e4 LT |
690 | { |
691 | if (!atomic_dec_and_lock(&mddev->active, &all_mddevs_lock)) | |
692 | return; | |
d3374825 | 693 | if (!mddev->raid_disks && list_empty(&mddev->disks) && |
cbd19983 N |
694 | mddev->ctime == 0 && !mddev->hold_active) { |
695 | /* Array is not configured at all, and not held active, | |
696 | * so destroy it */ | |
af8a2434 | 697 | list_del_init(&mddev->all_mddevs); |
28dec870 KO |
698 | |
699 | /* | |
700 | * Call queue_work inside the spinlock so that | |
701 | * flush_workqueue() after mddev_find will succeed in waiting | |
702 | * for the work to be done. | |
703 | */ | |
704 | INIT_WORK(&mddev->del_work, mddev_delayed_delete); | |
705 | queue_work(md_misc_wq, &mddev->del_work); | |
d3374825 N |
706 | } |
707 | spin_unlock(&all_mddevs_lock); | |
1da177e4 LT |
708 | } |
709 | ||
8376d3c1 | 710 | static void md_safemode_timeout(struct timer_list *t); |
25b2edfa | 711 | |
fd01b88c | 712 | void mddev_init(struct mddev *mddev) |
fafd7fb0 | 713 | { |
28dec870 | 714 | kobject_init(&mddev->kobj, &md_ktype); |
fafd7fb0 N |
715 | mutex_init(&mddev->open_mutex); |
716 | mutex_init(&mddev->reconfig_mutex); | |
717 | mutex_init(&mddev->bitmap_info.mutex); | |
718 | INIT_LIST_HEAD(&mddev->disks); | |
719 | INIT_LIST_HEAD(&mddev->all_mddevs); | |
8376d3c1 | 720 | timer_setup(&mddev->safemode_timer, md_safemode_timeout, 0); |
fafd7fb0 N |
721 | atomic_set(&mddev->active, 1); |
722 | atomic_set(&mddev->openers, 0); | |
723 | atomic_set(&mddev->active_io, 0); | |
85572d7c | 724 | spin_lock_init(&mddev->lock); |
4bc034d3 | 725 | atomic_set(&mddev->flush_pending, 0); |
fafd7fb0 N |
726 | init_waitqueue_head(&mddev->sb_wait); |
727 | init_waitqueue_head(&mddev->recovery_wait); | |
728 | mddev->reshape_position = MaxSector; | |
2c810cdd | 729 | mddev->reshape_backwards = 0; |
c4a39551 | 730 | mddev->last_sync_action = "none"; |
fafd7fb0 N |
731 | mddev->resync_min = 0; |
732 | mddev->resync_max = MaxSector; | |
733 | mddev->level = LEVEL_NONE; | |
734 | } | |
390ee602 | 735 | EXPORT_SYMBOL_GPL(mddev_init); |
fafd7fb0 | 736 | |
f72ffdd6 | 737 | static struct mddev *mddev_find(dev_t unit) |
1da177e4 | 738 | { |
fd01b88c | 739 | struct mddev *mddev, *new = NULL; |
1da177e4 | 740 | |
8f5f02c4 N |
741 | if (unit && MAJOR(unit) != MD_MAJOR) |
742 | unit &= ~((1<<MdpMinorShift)-1); | |
743 | ||
1da177e4 LT |
744 | retry: |
745 | spin_lock(&all_mddevs_lock); | |
efeb53c0 N |
746 | |
747 | if (unit) { | |
748 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
749 | if (mddev->unit == unit) { | |
750 | mddev_get(mddev); | |
751 | spin_unlock(&all_mddevs_lock); | |
752 | kfree(new); | |
753 | return mddev; | |
754 | } | |
755 | ||
756 | if (new) { | |
757 | list_add(&new->all_mddevs, &all_mddevs); | |
1da177e4 | 758 | spin_unlock(&all_mddevs_lock); |
efeb53c0 N |
759 | new->hold_active = UNTIL_IOCTL; |
760 | return new; | |
1da177e4 | 761 | } |
efeb53c0 N |
762 | } else if (new) { |
763 | /* find an unused unit number */ | |
764 | static int next_minor = 512; | |
765 | int start = next_minor; | |
766 | int is_free = 0; | |
767 | int dev = 0; | |
768 | while (!is_free) { | |
769 | dev = MKDEV(MD_MAJOR, next_minor); | |
770 | next_minor++; | |
771 | if (next_minor > MINORMASK) | |
772 | next_minor = 0; | |
773 | if (next_minor == start) { | |
774 | /* Oh dear, all in use. */ | |
775 | spin_unlock(&all_mddevs_lock); | |
776 | kfree(new); | |
777 | return NULL; | |
778 | } | |
f72ffdd6 | 779 | |
efeb53c0 N |
780 | is_free = 1; |
781 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
782 | if (mddev->unit == dev) { | |
783 | is_free = 0; | |
784 | break; | |
785 | } | |
786 | } | |
787 | new->unit = dev; | |
788 | new->md_minor = MINOR(dev); | |
789 | new->hold_active = UNTIL_STOP; | |
1da177e4 LT |
790 | list_add(&new->all_mddevs, &all_mddevs); |
791 | spin_unlock(&all_mddevs_lock); | |
792 | return new; | |
793 | } | |
794 | spin_unlock(&all_mddevs_lock); | |
795 | ||
9ffae0cf | 796 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
1da177e4 LT |
797 | if (!new) |
798 | return NULL; | |
799 | ||
1da177e4 LT |
800 | new->unit = unit; |
801 | if (MAJOR(unit) == MD_MAJOR) | |
802 | new->md_minor = MINOR(unit); | |
803 | else | |
804 | new->md_minor = MINOR(unit) >> MdpMinorShift; | |
805 | ||
fafd7fb0 | 806 | mddev_init(new); |
1da177e4 | 807 | |
1da177e4 LT |
808 | goto retry; |
809 | } | |
810 | ||
b6eb127d N |
811 | static struct attribute_group md_redundancy_group; |
812 | ||
5c47daf6 | 813 | void mddev_unlock(struct mddev *mddev) |
1da177e4 | 814 | { |
a64c876f | 815 | if (mddev->to_remove) { |
b6eb127d N |
816 | /* These cannot be removed under reconfig_mutex as |
817 | * an access to the files will try to take reconfig_mutex | |
818 | * while holding the file unremovable, which leads to | |
819 | * a deadlock. | |
bb4f1e9d N |
820 | * So hold set sysfs_active while the remove in happeing, |
821 | * and anything else which might set ->to_remove or my | |
822 | * otherwise change the sysfs namespace will fail with | |
823 | * -EBUSY if sysfs_active is still set. | |
824 | * We set sysfs_active under reconfig_mutex and elsewhere | |
825 | * test it under the same mutex to ensure its correct value | |
826 | * is seen. | |
b6eb127d | 827 | */ |
a64c876f N |
828 | struct attribute_group *to_remove = mddev->to_remove; |
829 | mddev->to_remove = NULL; | |
bb4f1e9d | 830 | mddev->sysfs_active = 1; |
b6eb127d N |
831 | mutex_unlock(&mddev->reconfig_mutex); |
832 | ||
00bcb4ac N |
833 | if (mddev->kobj.sd) { |
834 | if (to_remove != &md_redundancy_group) | |
835 | sysfs_remove_group(&mddev->kobj, to_remove); | |
836 | if (mddev->pers == NULL || | |
837 | mddev->pers->sync_request == NULL) { | |
838 | sysfs_remove_group(&mddev->kobj, &md_redundancy_group); | |
839 | if (mddev->sysfs_action) | |
840 | sysfs_put(mddev->sysfs_action); | |
e8efa9b8 JB |
841 | if (mddev->sysfs_completed) |
842 | sysfs_put(mddev->sysfs_completed); | |
843 | if (mddev->sysfs_degraded) | |
844 | sysfs_put(mddev->sysfs_degraded); | |
00bcb4ac | 845 | mddev->sysfs_action = NULL; |
e8efa9b8 JB |
846 | mddev->sysfs_completed = NULL; |
847 | mddev->sysfs_degraded = NULL; | |
00bcb4ac | 848 | } |
a64c876f | 849 | } |
bb4f1e9d | 850 | mddev->sysfs_active = 0; |
b6eb127d N |
851 | } else |
852 | mutex_unlock(&mddev->reconfig_mutex); | |
1da177e4 | 853 | |
751e67ca CD |
854 | /* As we've dropped the mutex we need a spinlock to |
855 | * make sure the thread doesn't disappear | |
01f96c0a N |
856 | */ |
857 | spin_lock(&pers_lock); | |
005eca5e | 858 | md_wakeup_thread(mddev->thread); |
4d5324f7 | 859 | wake_up(&mddev->sb_wait); |
01f96c0a | 860 | spin_unlock(&pers_lock); |
1da177e4 | 861 | } |
5c47daf6 | 862 | EXPORT_SYMBOL_GPL(mddev_unlock); |
1da177e4 | 863 | |
57d051dc | 864 | struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr) |
1ca69c4b N |
865 | { |
866 | struct md_rdev *rdev; | |
867 | ||
868 | rdev_for_each_rcu(rdev, mddev) | |
869 | if (rdev->desc_nr == nr) | |
870 | return rdev; | |
871 | ||
872 | return NULL; | |
873 | } | |
57d051dc | 874 | EXPORT_SYMBOL_GPL(md_find_rdev_nr_rcu); |
1ca69c4b N |
875 | |
876 | static struct md_rdev *find_rdev(struct mddev *mddev, dev_t dev) | |
1da177e4 | 877 | { |
3cb03002 | 878 | struct md_rdev *rdev; |
1da177e4 | 879 | |
dafb20fa | 880 | rdev_for_each(rdev, mddev) |
1da177e4 LT |
881 | if (rdev->bdev->bd_dev == dev) |
882 | return rdev; | |
159ec1fc | 883 | |
1da177e4 LT |
884 | return NULL; |
885 | } | |
886 | ||
1532d9e8 | 887 | struct md_rdev *md_find_rdev_rcu(struct mddev *mddev, dev_t dev) |
1ca69c4b N |
888 | { |
889 | struct md_rdev *rdev; | |
890 | ||
891 | rdev_for_each_rcu(rdev, mddev) | |
892 | if (rdev->bdev->bd_dev == dev) | |
893 | return rdev; | |
894 | ||
895 | return NULL; | |
896 | } | |
1532d9e8 | 897 | EXPORT_SYMBOL_GPL(md_find_rdev_rcu); |
1ca69c4b | 898 | |
84fc4b56 | 899 | static struct md_personality *find_pers(int level, char *clevel) |
2604b703 | 900 | { |
84fc4b56 | 901 | struct md_personality *pers; |
d9d166c2 N |
902 | list_for_each_entry(pers, &pers_list, list) { |
903 | if (level != LEVEL_NONE && pers->level == level) | |
2604b703 | 904 | return pers; |
d9d166c2 N |
905 | if (strcmp(pers->name, clevel)==0) |
906 | return pers; | |
907 | } | |
2604b703 N |
908 | return NULL; |
909 | } | |
910 | ||
b73df2d3 | 911 | /* return the offset of the super block in 512byte sectors */ |
3cb03002 | 912 | static inline sector_t calc_dev_sboffset(struct md_rdev *rdev) |
1da177e4 | 913 | { |
57b2caa3 | 914 | sector_t num_sectors = i_size_read(rdev->bdev->bd_inode) / 512; |
b73df2d3 | 915 | return MD_NEW_SIZE_SECTORS(num_sectors); |
1da177e4 LT |
916 | } |
917 | ||
f72ffdd6 | 918 | static int alloc_disk_sb(struct md_rdev *rdev) |
1da177e4 | 919 | { |
1da177e4 | 920 | rdev->sb_page = alloc_page(GFP_KERNEL); |
7f0f0d87 | 921 | if (!rdev->sb_page) |
ebc24337 | 922 | return -ENOMEM; |
1da177e4 LT |
923 | return 0; |
924 | } | |
925 | ||
545c8795 | 926 | void md_rdev_clear(struct md_rdev *rdev) |
1da177e4 LT |
927 | { |
928 | if (rdev->sb_page) { | |
2d1f3b5d | 929 | put_page(rdev->sb_page); |
1da177e4 LT |
930 | rdev->sb_loaded = 0; |
931 | rdev->sb_page = NULL; | |
0f420358 | 932 | rdev->sb_start = 0; |
dd8ac336 | 933 | rdev->sectors = 0; |
1da177e4 | 934 | } |
2699b672 N |
935 | if (rdev->bb_page) { |
936 | put_page(rdev->bb_page); | |
937 | rdev->bb_page = NULL; | |
938 | } | |
d3b407fb | 939 | badblocks_exit(&rdev->badblocks); |
1da177e4 | 940 | } |
545c8795 | 941 | EXPORT_SYMBOL_GPL(md_rdev_clear); |
1da177e4 | 942 | |
4246a0b6 | 943 | static void super_written(struct bio *bio) |
7bfa19f2 | 944 | { |
3cb03002 | 945 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 946 | struct mddev *mddev = rdev->mddev; |
7bfa19f2 | 947 | |
4e4cbee9 | 948 | if (bio->bi_status) { |
b3db8a21 GJ |
949 | pr_err("md: %s gets error=%d\n", __func__, |
950 | blk_status_to_errno(bio->bi_status)); | |
a9701a30 | 951 | md_error(mddev, rdev); |
46533ff7 N |
952 | if (!test_bit(Faulty, &rdev->flags) |
953 | && (bio->bi_opf & MD_FAILFAST)) { | |
2953079c | 954 | set_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags); |
46533ff7 N |
955 | set_bit(LastDev, &rdev->flags); |
956 | } | |
957 | } else | |
958 | clear_bit(LastDev, &rdev->flags); | |
7bfa19f2 | 959 | |
a9701a30 N |
960 | if (atomic_dec_and_test(&mddev->pending_writes)) |
961 | wake_up(&mddev->sb_wait); | |
ed3b98c7 | 962 | rdev_dec_pending(rdev, mddev); |
f8b58edf | 963 | bio_put(bio); |
7bfa19f2 N |
964 | } |
965 | ||
fd01b88c | 966 | void md_super_write(struct mddev *mddev, struct md_rdev *rdev, |
7bfa19f2 N |
967 | sector_t sector, int size, struct page *page) |
968 | { | |
969 | /* write first size bytes of page to sector of rdev | |
970 | * Increment mddev->pending_writes before returning | |
971 | * and decrement it on completion, waking up sb_wait | |
972 | * if zero is reached. | |
973 | * If an error occurred, call md_error | |
974 | */ | |
46533ff7 N |
975 | struct bio *bio; |
976 | int ff = 0; | |
977 | ||
4b6c1060 HM |
978 | if (!page) |
979 | return; | |
980 | ||
46533ff7 N |
981 | if (test_bit(Faulty, &rdev->flags)) |
982 | return; | |
983 | ||
6a596569 | 984 | bio = bio_alloc_bioset(GFP_NOIO, 1, &mddev->sync_set); |
7bfa19f2 | 985 | |
ed3b98c7 SL |
986 | atomic_inc(&rdev->nr_pending); |
987 | ||
74d46992 | 988 | bio_set_dev(bio, rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev); |
4f024f37 | 989 | bio->bi_iter.bi_sector = sector; |
7bfa19f2 N |
990 | bio_add_page(bio, page, size, 0); |
991 | bio->bi_private = rdev; | |
992 | bio->bi_end_io = super_written; | |
46533ff7 N |
993 | |
994 | if (test_bit(MD_FAILFAST_SUPPORTED, &mddev->flags) && | |
995 | test_bit(FailFast, &rdev->flags) && | |
996 | !test_bit(LastDev, &rdev->flags)) | |
997 | ff = MD_FAILFAST; | |
5a8948f8 | 998 | bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH | REQ_FUA | ff; |
a9701a30 | 999 | |
7bfa19f2 | 1000 | atomic_inc(&mddev->pending_writes); |
4e49ea4a | 1001 | submit_bio(bio); |
a9701a30 N |
1002 | } |
1003 | ||
46533ff7 | 1004 | int md_super_wait(struct mddev *mddev) |
a9701a30 | 1005 | { |
e9c7469b | 1006 | /* wait for all superblock writes that were scheduled to complete */ |
1967cd56 | 1007 | wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0); |
2953079c | 1008 | if (test_and_clear_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags)) |
46533ff7 N |
1009 | return -EAGAIN; |
1010 | return 0; | |
7bfa19f2 N |
1011 | } |
1012 | ||
3cb03002 | 1013 | int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, |
796a5cf0 | 1014 | struct page *page, int op, int op_flags, bool metadata_op) |
1da177e4 | 1015 | { |
32637385 CH |
1016 | struct bio bio; |
1017 | struct bio_vec bvec; | |
1018 | ||
1019 | bio_init(&bio, &bvec, 1); | |
1da177e4 | 1020 | |
74d46992 | 1021 | if (metadata_op && rdev->meta_bdev) |
32637385 | 1022 | bio_set_dev(&bio, rdev->meta_bdev); |
74d46992 | 1023 | else |
32637385 CH |
1024 | bio_set_dev(&bio, rdev->bdev); |
1025 | bio.bi_opf = op | op_flags; | |
ccebd4c4 | 1026 | if (metadata_op) |
32637385 | 1027 | bio.bi_iter.bi_sector = sector + rdev->sb_start; |
1fdd6fc9 N |
1028 | else if (rdev->mddev->reshape_position != MaxSector && |
1029 | (rdev->mddev->reshape_backwards == | |
1030 | (sector >= rdev->mddev->reshape_position))) | |
32637385 | 1031 | bio.bi_iter.bi_sector = sector + rdev->new_data_offset; |
ccebd4c4 | 1032 | else |
32637385 CH |
1033 | bio.bi_iter.bi_sector = sector + rdev->data_offset; |
1034 | bio_add_page(&bio, page, size, 0); | |
4e49ea4a | 1035 | |
32637385 | 1036 | submit_bio_wait(&bio); |
1da177e4 | 1037 | |
32637385 | 1038 | return !bio.bi_status; |
1da177e4 | 1039 | } |
a8745db2 | 1040 | EXPORT_SYMBOL_GPL(sync_page_io); |
1da177e4 | 1041 | |
f72ffdd6 | 1042 | static int read_disk_sb(struct md_rdev *rdev, int size) |
1da177e4 LT |
1043 | { |
1044 | char b[BDEVNAME_SIZE]; | |
403df478 | 1045 | |
1da177e4 LT |
1046 | if (rdev->sb_loaded) |
1047 | return 0; | |
1048 | ||
796a5cf0 | 1049 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, REQ_OP_READ, 0, true)) |
1da177e4 LT |
1050 | goto fail; |
1051 | rdev->sb_loaded = 1; | |
1052 | return 0; | |
1053 | ||
1054 | fail: | |
9d48739e N |
1055 | pr_err("md: disabled device %s, could not read superblock.\n", |
1056 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
1057 | return -EINVAL; |
1058 | } | |
1059 | ||
e6fd2093 | 1060 | static int md_uuid_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 | 1061 | { |
f72ffdd6 | 1062 | return sb1->set_uuid0 == sb2->set_uuid0 && |
05710466 AN |
1063 | sb1->set_uuid1 == sb2->set_uuid1 && |
1064 | sb1->set_uuid2 == sb2->set_uuid2 && | |
1065 | sb1->set_uuid3 == sb2->set_uuid3; | |
1da177e4 LT |
1066 | } |
1067 | ||
e6fd2093 | 1068 | static int md_sb_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 LT |
1069 | { |
1070 | int ret; | |
1071 | mdp_super_t *tmp1, *tmp2; | |
1072 | ||
1073 | tmp1 = kmalloc(sizeof(*tmp1),GFP_KERNEL); | |
1074 | tmp2 = kmalloc(sizeof(*tmp2),GFP_KERNEL); | |
1075 | ||
1076 | if (!tmp1 || !tmp2) { | |
1077 | ret = 0; | |
1da177e4 LT |
1078 | goto abort; |
1079 | } | |
1080 | ||
1081 | *tmp1 = *sb1; | |
1082 | *tmp2 = *sb2; | |
1083 | ||
1084 | /* | |
1085 | * nr_disks is not constant | |
1086 | */ | |
1087 | tmp1->nr_disks = 0; | |
1088 | tmp2->nr_disks = 0; | |
1089 | ||
ce0c8e05 | 1090 | ret = (memcmp(tmp1, tmp2, MD_SB_GENERIC_CONSTANT_WORDS * 4) == 0); |
1da177e4 | 1091 | abort: |
990a8baf JJ |
1092 | kfree(tmp1); |
1093 | kfree(tmp2); | |
1da177e4 LT |
1094 | return ret; |
1095 | } | |
1096 | ||
4d167f09 N |
1097 | static u32 md_csum_fold(u32 csum) |
1098 | { | |
1099 | csum = (csum & 0xffff) + (csum >> 16); | |
1100 | return (csum & 0xffff) + (csum >> 16); | |
1101 | } | |
1102 | ||
f72ffdd6 | 1103 | static unsigned int calc_sb_csum(mdp_super_t *sb) |
1da177e4 | 1104 | { |
4d167f09 N |
1105 | u64 newcsum = 0; |
1106 | u32 *sb32 = (u32*)sb; | |
1107 | int i; | |
1da177e4 LT |
1108 | unsigned int disk_csum, csum; |
1109 | ||
1110 | disk_csum = sb->sb_csum; | |
1111 | sb->sb_csum = 0; | |
4d167f09 N |
1112 | |
1113 | for (i = 0; i < MD_SB_BYTES/4 ; i++) | |
1114 | newcsum += sb32[i]; | |
1115 | csum = (newcsum & 0xffffffff) + (newcsum>>32); | |
1116 | ||
4d167f09 N |
1117 | #ifdef CONFIG_ALPHA |
1118 | /* This used to use csum_partial, which was wrong for several | |
1119 | * reasons including that different results are returned on | |
1120 | * different architectures. It isn't critical that we get exactly | |
1121 | * the same return value as before (we always csum_fold before | |
1122 | * testing, and that removes any differences). However as we | |
1123 | * know that csum_partial always returned a 16bit value on | |
1124 | * alphas, do a fold to maximise conformity to previous behaviour. | |
1125 | */ | |
1126 | sb->sb_csum = md_csum_fold(disk_csum); | |
1127 | #else | |
1da177e4 | 1128 | sb->sb_csum = disk_csum; |
4d167f09 | 1129 | #endif |
1da177e4 LT |
1130 | return csum; |
1131 | } | |
1132 | ||
1da177e4 LT |
1133 | /* |
1134 | * Handle superblock details. | |
1135 | * We want to be able to handle multiple superblock formats | |
1136 | * so we have a common interface to them all, and an array of | |
1137 | * different handlers. | |
1138 | * We rely on user-space to write the initial superblock, and support | |
1139 | * reading and updating of superblocks. | |
1140 | * Interface methods are: | |
3cb03002 | 1141 | * int load_super(struct md_rdev *dev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1142 | * loads and validates a superblock on dev. |
1143 | * if refdev != NULL, compare superblocks on both devices | |
1144 | * Return: | |
1145 | * 0 - dev has a superblock that is compatible with refdev | |
1146 | * 1 - dev has a superblock that is compatible and newer than refdev | |
1147 | * so dev should be used as the refdev in future | |
1148 | * -EINVAL superblock incompatible or invalid | |
1149 | * -othererror e.g. -EIO | |
1150 | * | |
fd01b88c | 1151 | * int validate_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1152 | * Verify that dev is acceptable into mddev. |
1153 | * The first time, mddev->raid_disks will be 0, and data from | |
1154 | * dev should be merged in. Subsequent calls check that dev | |
1155 | * is new enough. Return 0 or -EINVAL | |
1156 | * | |
fd01b88c | 1157 | * void sync_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1158 | * Update the superblock for rdev with data in mddev |
1159 | * This does not write to disc. | |
1160 | * | |
1161 | */ | |
1162 | ||
1163 | struct super_type { | |
0cd17fec CW |
1164 | char *name; |
1165 | struct module *owner; | |
c6563a8c N |
1166 | int (*load_super)(struct md_rdev *rdev, |
1167 | struct md_rdev *refdev, | |
0cd17fec | 1168 | int minor_version); |
c6563a8c N |
1169 | int (*validate_super)(struct mddev *mddev, |
1170 | struct md_rdev *rdev); | |
1171 | void (*sync_super)(struct mddev *mddev, | |
1172 | struct md_rdev *rdev); | |
3cb03002 | 1173 | unsigned long long (*rdev_size_change)(struct md_rdev *rdev, |
15f4a5fd | 1174 | sector_t num_sectors); |
c6563a8c N |
1175 | int (*allow_new_offset)(struct md_rdev *rdev, |
1176 | unsigned long long new_offset); | |
1da177e4 LT |
1177 | }; |
1178 | ||
0894cc30 AN |
1179 | /* |
1180 | * Check that the given mddev has no bitmap. | |
1181 | * | |
1182 | * This function is called from the run method of all personalities that do not | |
1183 | * support bitmaps. It prints an error message and returns non-zero if mddev | |
1184 | * has a bitmap. Otherwise, it returns 0. | |
1185 | * | |
1186 | */ | |
fd01b88c | 1187 | int md_check_no_bitmap(struct mddev *mddev) |
0894cc30 | 1188 | { |
c3d9714e | 1189 | if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset) |
0894cc30 | 1190 | return 0; |
9d48739e | 1191 | pr_warn("%s: bitmaps are not supported for %s\n", |
0894cc30 AN |
1192 | mdname(mddev), mddev->pers->name); |
1193 | return 1; | |
1194 | } | |
1195 | EXPORT_SYMBOL(md_check_no_bitmap); | |
1196 | ||
1da177e4 | 1197 | /* |
f72ffdd6 | 1198 | * load_super for 0.90.0 |
1da177e4 | 1199 | */ |
3cb03002 | 1200 | static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1201 | { |
1202 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
1203 | mdp_super_t *sb; | |
1204 | int ret; | |
228fc7d7 | 1205 | bool spare_disk = true; |
1da177e4 LT |
1206 | |
1207 | /* | |
0f420358 | 1208 | * Calculate the position of the superblock (512byte sectors), |
1da177e4 LT |
1209 | * it's at the end of the disk. |
1210 | * | |
1211 | * It also happens to be a multiple of 4Kb. | |
1212 | */ | |
57b2caa3 | 1213 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 1214 | |
0002b271 | 1215 | ret = read_disk_sb(rdev, MD_SB_BYTES); |
9d48739e N |
1216 | if (ret) |
1217 | return ret; | |
1da177e4 LT |
1218 | |
1219 | ret = -EINVAL; | |
1220 | ||
1221 | bdevname(rdev->bdev, b); | |
65a06f06 | 1222 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1223 | |
1224 | if (sb->md_magic != MD_SB_MAGIC) { | |
9d48739e | 1225 | pr_warn("md: invalid raid superblock magic on %s\n", b); |
1da177e4 LT |
1226 | goto abort; |
1227 | } | |
1228 | ||
1229 | if (sb->major_version != 0 || | |
f6705578 N |
1230 | sb->minor_version < 90 || |
1231 | sb->minor_version > 91) { | |
9d48739e N |
1232 | pr_warn("Bad version number %d.%d on %s\n", |
1233 | sb->major_version, sb->minor_version, b); | |
1da177e4 LT |
1234 | goto abort; |
1235 | } | |
1236 | ||
1237 | if (sb->raid_disks <= 0) | |
1238 | goto abort; | |
1239 | ||
4d167f09 | 1240 | if (md_csum_fold(calc_sb_csum(sb)) != md_csum_fold(sb->sb_csum)) { |
9d48739e | 1241 | pr_warn("md: invalid superblock checksum on %s\n", b); |
1da177e4 LT |
1242 | goto abort; |
1243 | } | |
1244 | ||
1245 | rdev->preferred_minor = sb->md_minor; | |
1246 | rdev->data_offset = 0; | |
c6563a8c | 1247 | rdev->new_data_offset = 0; |
0002b271 | 1248 | rdev->sb_size = MD_SB_BYTES; |
9f2f3830 | 1249 | rdev->badblocks.shift = -1; |
1da177e4 LT |
1250 | |
1251 | if (sb->level == LEVEL_MULTIPATH) | |
1252 | rdev->desc_nr = -1; | |
1253 | else | |
1254 | rdev->desc_nr = sb->this_disk.number; | |
1255 | ||
228fc7d7 YY |
1256 | /* not spare disk, or LEVEL_MULTIPATH */ |
1257 | if (sb->level == LEVEL_MULTIPATH || | |
1258 | (rdev->desc_nr >= 0 && | |
3b7436cc | 1259 | rdev->desc_nr < MD_SB_DISKS && |
228fc7d7 YY |
1260 | sb->disks[rdev->desc_nr].state & |
1261 | ((1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE)))) | |
1262 | spare_disk = false; | |
1263 | ||
9a7b2b0f | 1264 | if (!refdev) { |
228fc7d7 | 1265 | if (!spare_disk) |
6a5cb53a YY |
1266 | ret = 1; |
1267 | else | |
1268 | ret = 0; | |
9a7b2b0f | 1269 | } else { |
1da177e4 | 1270 | __u64 ev1, ev2; |
65a06f06 | 1271 | mdp_super_t *refsb = page_address(refdev->sb_page); |
e6fd2093 | 1272 | if (!md_uuid_equal(refsb, sb)) { |
9d48739e | 1273 | pr_warn("md: %s has different UUID to %s\n", |
1da177e4 LT |
1274 | b, bdevname(refdev->bdev,b2)); |
1275 | goto abort; | |
1276 | } | |
e6fd2093 | 1277 | if (!md_sb_equal(refsb, sb)) { |
9d48739e N |
1278 | pr_warn("md: %s has same UUID but different superblock to %s\n", |
1279 | b, bdevname(refdev->bdev, b2)); | |
1da177e4 LT |
1280 | goto abort; |
1281 | } | |
1282 | ev1 = md_event(sb); | |
1283 | ev2 = md_event(refsb); | |
6a5cb53a | 1284 | |
228fc7d7 | 1285 | if (!spare_disk && ev1 > ev2) |
1da177e4 | 1286 | ret = 1; |
f72ffdd6 | 1287 | else |
1da177e4 LT |
1288 | ret = 0; |
1289 | } | |
8190e754 | 1290 | rdev->sectors = rdev->sb_start; |
667a5313 N |
1291 | /* Limit to 4TB as metadata cannot record more than that. |
1292 | * (not needed for Linear and RAID0 as metadata doesn't | |
1293 | * record this size) | |
1294 | */ | |
72deb455 | 1295 | if ((u64)rdev->sectors >= (2ULL << 32) && sb->level >= 1) |
3312c951 | 1296 | rdev->sectors = (sector_t)(2ULL << 32) - 2; |
1da177e4 | 1297 | |
27a7b260 | 1298 | if (rdev->sectors < ((sector_t)sb->size) * 2 && sb->level >= 1) |
2bf071bf N |
1299 | /* "this cannot possibly happen" ... */ |
1300 | ret = -EINVAL; | |
1301 | ||
1da177e4 LT |
1302 | abort: |
1303 | return ret; | |
1304 | } | |
1305 | ||
1306 | /* | |
1307 | * validate_super for 0.90.0 | |
1308 | */ | |
fd01b88c | 1309 | static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1310 | { |
1311 | mdp_disk_t *desc; | |
65a06f06 | 1312 | mdp_super_t *sb = page_address(rdev->sb_page); |
07d84d10 | 1313 | __u64 ev1 = md_event(sb); |
1da177e4 | 1314 | |
41158c7e | 1315 | rdev->raid_disk = -1; |
c5d79adb N |
1316 | clear_bit(Faulty, &rdev->flags); |
1317 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1318 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1319 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1320 | |
1da177e4 LT |
1321 | if (mddev->raid_disks == 0) { |
1322 | mddev->major_version = 0; | |
1323 | mddev->minor_version = sb->minor_version; | |
1324 | mddev->patch_version = sb->patch_version; | |
e691063a | 1325 | mddev->external = 0; |
9d8f0363 | 1326 | mddev->chunk_sectors = sb->chunk_size >> 9; |
1da177e4 LT |
1327 | mddev->ctime = sb->ctime; |
1328 | mddev->utime = sb->utime; | |
1329 | mddev->level = sb->level; | |
d9d166c2 | 1330 | mddev->clevel[0] = 0; |
1da177e4 LT |
1331 | mddev->layout = sb->layout; |
1332 | mddev->raid_disks = sb->raid_disks; | |
27a7b260 | 1333 | mddev->dev_sectors = ((sector_t)sb->size) * 2; |
07d84d10 | 1334 | mddev->events = ev1; |
c3d9714e | 1335 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1336 | mddev->bitmap_info.space = 0; |
1337 | /* bitmap can use 60 K after the 4K superblocks */ | |
c3d9714e | 1338 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 1339 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
2c810cdd | 1340 | mddev->reshape_backwards = 0; |
1da177e4 | 1341 | |
f6705578 N |
1342 | if (mddev->minor_version >= 91) { |
1343 | mddev->reshape_position = sb->reshape_position; | |
1344 | mddev->delta_disks = sb->delta_disks; | |
1345 | mddev->new_level = sb->new_level; | |
1346 | mddev->new_layout = sb->new_layout; | |
664e7c41 | 1347 | mddev->new_chunk_sectors = sb->new_chunk >> 9; |
2c810cdd N |
1348 | if (mddev->delta_disks < 0) |
1349 | mddev->reshape_backwards = 1; | |
f6705578 N |
1350 | } else { |
1351 | mddev->reshape_position = MaxSector; | |
1352 | mddev->delta_disks = 0; | |
1353 | mddev->new_level = mddev->level; | |
1354 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1355 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 | 1356 | } |
33f2c35a N |
1357 | if (mddev->level == 0) |
1358 | mddev->layout = -1; | |
f6705578 | 1359 | |
1da177e4 LT |
1360 | if (sb->state & (1<<MD_SB_CLEAN)) |
1361 | mddev->recovery_cp = MaxSector; | |
1362 | else { | |
f72ffdd6 | 1363 | if (sb->events_hi == sb->cp_events_hi && |
1da177e4 LT |
1364 | sb->events_lo == sb->cp_events_lo) { |
1365 | mddev->recovery_cp = sb->recovery_cp; | |
1366 | } else | |
1367 | mddev->recovery_cp = 0; | |
1368 | } | |
1369 | ||
1370 | memcpy(mddev->uuid+0, &sb->set_uuid0, 4); | |
1371 | memcpy(mddev->uuid+4, &sb->set_uuid1, 4); | |
1372 | memcpy(mddev->uuid+8, &sb->set_uuid2, 4); | |
1373 | memcpy(mddev->uuid+12,&sb->set_uuid3, 4); | |
1374 | ||
1375 | mddev->max_disks = MD_SB_DISKS; | |
a654b9d8 N |
1376 | |
1377 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT) && | |
6409bb05 | 1378 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1379 | mddev->bitmap_info.offset = |
1380 | mddev->bitmap_info.default_offset; | |
6409bb05 | 1381 | mddev->bitmap_info.space = |
c9ad020f | 1382 | mddev->bitmap_info.default_space; |
6409bb05 | 1383 | } |
a654b9d8 | 1384 | |
41158c7e | 1385 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1386 | /* Insist on good event counter while assembling, except |
1387 | * for spares (which don't need an event count) */ | |
1da177e4 | 1388 | ++ev1; |
be6800a7 N |
1389 | if (sb->disks[rdev->desc_nr].state & ( |
1390 | (1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE))) | |
f72ffdd6 | 1391 | if (ev1 < mddev->events) |
be6800a7 | 1392 | return -EINVAL; |
41158c7e N |
1393 | } else if (mddev->bitmap) { |
1394 | /* if adding to array with a bitmap, then we can accept an | |
1395 | * older device ... but not too old. | |
1396 | */ | |
41158c7e N |
1397 | if (ev1 < mddev->bitmap->events_cleared) |
1398 | return 0; | |
8313b8e5 N |
1399 | if (ev1 < mddev->events) |
1400 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1401 | } else { |
1402 | if (ev1 < mddev->events) | |
1403 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1404 | return 0; | |
1405 | } | |
41158c7e | 1406 | |
1da177e4 | 1407 | if (mddev->level != LEVEL_MULTIPATH) { |
1da177e4 LT |
1408 | desc = sb->disks + rdev->desc_nr; |
1409 | ||
1410 | if (desc->state & (1<<MD_DISK_FAULTY)) | |
b2d444d7 | 1411 | set_bit(Faulty, &rdev->flags); |
7c7546cc N |
1412 | else if (desc->state & (1<<MD_DISK_SYNC) /* && |
1413 | desc->raid_disk < mddev->raid_disks */) { | |
b2d444d7 | 1414 | set_bit(In_sync, &rdev->flags); |
1da177e4 | 1415 | rdev->raid_disk = desc->raid_disk; |
f466722c | 1416 | rdev->saved_raid_disk = desc->raid_disk; |
0261cd9f N |
1417 | } else if (desc->state & (1<<MD_DISK_ACTIVE)) { |
1418 | /* active but not in sync implies recovery up to | |
1419 | * reshape position. We don't know exactly where | |
1420 | * that is, so set to zero for now */ | |
1421 | if (mddev->minor_version >= 91) { | |
1422 | rdev->recovery_offset = 0; | |
1423 | rdev->raid_disk = desc->raid_disk; | |
1424 | } | |
1da177e4 | 1425 | } |
8ddf9efe N |
1426 | if (desc->state & (1<<MD_DISK_WRITEMOSTLY)) |
1427 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1428 | if (desc->state & (1<<MD_DISK_FAILFAST)) |
1429 | set_bit(FailFast, &rdev->flags); | |
41158c7e | 1430 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1431 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1432 | return 0; |
1433 | } | |
1434 | ||
1435 | /* | |
1436 | * sync_super for 0.90.0 | |
1437 | */ | |
fd01b88c | 1438 | static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1439 | { |
1440 | mdp_super_t *sb; | |
3cb03002 | 1441 | struct md_rdev *rdev2; |
1da177e4 | 1442 | int next_spare = mddev->raid_disks; |
19133a42 | 1443 | |
1da177e4 LT |
1444 | /* make rdev->sb match mddev data.. |
1445 | * | |
1446 | * 1/ zero out disks | |
1447 | * 2/ Add info for each disk, keeping track of highest desc_nr (next_spare); | |
1448 | * 3/ any empty disks < next_spare become removed | |
1449 | * | |
1450 | * disks[0] gets initialised to REMOVED because | |
1451 | * we cannot be sure from other fields if it has | |
1452 | * been initialised or not. | |
1453 | */ | |
1454 | int i; | |
1455 | int active=0, working=0,failed=0,spare=0,nr_disks=0; | |
1456 | ||
61181565 N |
1457 | rdev->sb_size = MD_SB_BYTES; |
1458 | ||
65a06f06 | 1459 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1460 | |
1461 | memset(sb, 0, sizeof(*sb)); | |
1462 | ||
1463 | sb->md_magic = MD_SB_MAGIC; | |
1464 | sb->major_version = mddev->major_version; | |
1da177e4 LT |
1465 | sb->patch_version = mddev->patch_version; |
1466 | sb->gvalid_words = 0; /* ignored */ | |
1467 | memcpy(&sb->set_uuid0, mddev->uuid+0, 4); | |
1468 | memcpy(&sb->set_uuid1, mddev->uuid+4, 4); | |
1469 | memcpy(&sb->set_uuid2, mddev->uuid+8, 4); | |
1470 | memcpy(&sb->set_uuid3, mddev->uuid+12,4); | |
1471 | ||
9ebc6ef1 | 1472 | sb->ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 1473 | sb->level = mddev->level; |
58c0fed4 | 1474 | sb->size = mddev->dev_sectors / 2; |
1da177e4 LT |
1475 | sb->raid_disks = mddev->raid_disks; |
1476 | sb->md_minor = mddev->md_minor; | |
e691063a | 1477 | sb->not_persistent = 0; |
9ebc6ef1 | 1478 | sb->utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
1479 | sb->state = 0; |
1480 | sb->events_hi = (mddev->events>>32); | |
1481 | sb->events_lo = (u32)mddev->events; | |
1482 | ||
f6705578 N |
1483 | if (mddev->reshape_position == MaxSector) |
1484 | sb->minor_version = 90; | |
1485 | else { | |
1486 | sb->minor_version = 91; | |
1487 | sb->reshape_position = mddev->reshape_position; | |
1488 | sb->new_level = mddev->new_level; | |
1489 | sb->delta_disks = mddev->delta_disks; | |
1490 | sb->new_layout = mddev->new_layout; | |
664e7c41 | 1491 | sb->new_chunk = mddev->new_chunk_sectors << 9; |
f6705578 N |
1492 | } |
1493 | mddev->minor_version = sb->minor_version; | |
1da177e4 LT |
1494 | if (mddev->in_sync) |
1495 | { | |
1496 | sb->recovery_cp = mddev->recovery_cp; | |
1497 | sb->cp_events_hi = (mddev->events>>32); | |
1498 | sb->cp_events_lo = (u32)mddev->events; | |
1499 | if (mddev->recovery_cp == MaxSector) | |
1500 | sb->state = (1<< MD_SB_CLEAN); | |
1501 | } else | |
1502 | sb->recovery_cp = 0; | |
1503 | ||
1504 | sb->layout = mddev->layout; | |
9d8f0363 | 1505 | sb->chunk_size = mddev->chunk_sectors << 9; |
1da177e4 | 1506 | |
c3d9714e | 1507 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) |
a654b9d8 N |
1508 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); |
1509 | ||
1da177e4 | 1510 | sb->disks[0].state = (1<<MD_DISK_REMOVED); |
dafb20fa | 1511 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1512 | mdp_disk_t *d; |
86e6ffdd | 1513 | int desc_nr; |
0261cd9f N |
1514 | int is_active = test_bit(In_sync, &rdev2->flags); |
1515 | ||
1516 | if (rdev2->raid_disk >= 0 && | |
1517 | sb->minor_version >= 91) | |
1518 | /* we have nowhere to store the recovery_offset, | |
1519 | * but if it is not below the reshape_position, | |
1520 | * we can piggy-back on that. | |
1521 | */ | |
1522 | is_active = 1; | |
1523 | if (rdev2->raid_disk < 0 || | |
1524 | test_bit(Faulty, &rdev2->flags)) | |
1525 | is_active = 0; | |
1526 | if (is_active) | |
86e6ffdd | 1527 | desc_nr = rdev2->raid_disk; |
1da177e4 | 1528 | else |
86e6ffdd | 1529 | desc_nr = next_spare++; |
19133a42 | 1530 | rdev2->desc_nr = desc_nr; |
1da177e4 LT |
1531 | d = &sb->disks[rdev2->desc_nr]; |
1532 | nr_disks++; | |
1533 | d->number = rdev2->desc_nr; | |
1534 | d->major = MAJOR(rdev2->bdev->bd_dev); | |
1535 | d->minor = MINOR(rdev2->bdev->bd_dev); | |
0261cd9f | 1536 | if (is_active) |
1da177e4 LT |
1537 | d->raid_disk = rdev2->raid_disk; |
1538 | else | |
1539 | d->raid_disk = rdev2->desc_nr; /* compatibility */ | |
1be7892f | 1540 | if (test_bit(Faulty, &rdev2->flags)) |
1da177e4 | 1541 | d->state = (1<<MD_DISK_FAULTY); |
0261cd9f | 1542 | else if (is_active) { |
1da177e4 | 1543 | d->state = (1<<MD_DISK_ACTIVE); |
0261cd9f N |
1544 | if (test_bit(In_sync, &rdev2->flags)) |
1545 | d->state |= (1<<MD_DISK_SYNC); | |
1da177e4 LT |
1546 | active++; |
1547 | working++; | |
1548 | } else { | |
1549 | d->state = 0; | |
1550 | spare++; | |
1551 | working++; | |
1552 | } | |
8ddf9efe N |
1553 | if (test_bit(WriteMostly, &rdev2->flags)) |
1554 | d->state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
1555 | if (test_bit(FailFast, &rdev2->flags)) |
1556 | d->state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 | 1557 | } |
1da177e4 LT |
1558 | /* now set the "removed" and "faulty" bits on any missing devices */ |
1559 | for (i=0 ; i < mddev->raid_disks ; i++) { | |
1560 | mdp_disk_t *d = &sb->disks[i]; | |
1561 | if (d->state == 0 && d->number == 0) { | |
1562 | d->number = i; | |
1563 | d->raid_disk = i; | |
1564 | d->state = (1<<MD_DISK_REMOVED); | |
1565 | d->state |= (1<<MD_DISK_FAULTY); | |
1566 | failed++; | |
1567 | } | |
1568 | } | |
1569 | sb->nr_disks = nr_disks; | |
1570 | sb->active_disks = active; | |
1571 | sb->working_disks = working; | |
1572 | sb->failed_disks = failed; | |
1573 | sb->spare_disks = spare; | |
1574 | ||
1575 | sb->this_disk = sb->disks[rdev->desc_nr]; | |
1576 | sb->sb_csum = calc_sb_csum(sb); | |
1577 | } | |
1578 | ||
0cd17fec CW |
1579 | /* |
1580 | * rdev_size_change for 0.90.0 | |
1581 | */ | |
1582 | static unsigned long long | |
3cb03002 | 1583 | super_90_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec | 1584 | { |
58c0fed4 | 1585 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1586 | return 0; /* component must fit device */ |
c3d9714e | 1587 | if (rdev->mddev->bitmap_info.offset) |
0cd17fec | 1588 | return 0; /* can't move bitmap */ |
57b2caa3 | 1589 | rdev->sb_start = calc_dev_sboffset(rdev); |
15f4a5fd AN |
1590 | if (!num_sectors || num_sectors > rdev->sb_start) |
1591 | num_sectors = rdev->sb_start; | |
27a7b260 N |
1592 | /* Limit to 4TB as metadata cannot record more than that. |
1593 | * 4TB == 2^32 KB, or 2*2^32 sectors. | |
1594 | */ | |
72deb455 | 1595 | if ((u64)num_sectors >= (2ULL << 32) && rdev->mddev->level >= 1) |
3312c951 | 1596 | num_sectors = (sector_t)(2ULL << 32) - 2; |
46533ff7 N |
1597 | do { |
1598 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
0cd17fec | 1599 | rdev->sb_page); |
46533ff7 | 1600 | } while (md_super_wait(rdev->mddev) < 0); |
c26a44ed | 1601 | return num_sectors; |
0cd17fec CW |
1602 | } |
1603 | ||
c6563a8c N |
1604 | static int |
1605 | super_90_allow_new_offset(struct md_rdev *rdev, unsigned long long new_offset) | |
1606 | { | |
1607 | /* non-zero offset changes not possible with v0.90 */ | |
1608 | return new_offset == 0; | |
1609 | } | |
0cd17fec | 1610 | |
1da177e4 LT |
1611 | /* |
1612 | * version 1 superblock | |
1613 | */ | |
1614 | ||
f72ffdd6 | 1615 | static __le32 calc_sb_1_csum(struct mdp_superblock_1 *sb) |
1da177e4 | 1616 | { |
1c05b4bc N |
1617 | __le32 disk_csum; |
1618 | u32 csum; | |
1da177e4 LT |
1619 | unsigned long long newcsum; |
1620 | int size = 256 + le32_to_cpu(sb->max_dev)*2; | |
1c05b4bc | 1621 | __le32 *isuper = (__le32*)sb; |
1da177e4 LT |
1622 | |
1623 | disk_csum = sb->sb_csum; | |
1624 | sb->sb_csum = 0; | |
1625 | newcsum = 0; | |
1f3c9907 | 1626 | for (; size >= 4; size -= 4) |
1da177e4 LT |
1627 | newcsum += le32_to_cpu(*isuper++); |
1628 | ||
1629 | if (size == 2) | |
1c05b4bc | 1630 | newcsum += le16_to_cpu(*(__le16*) isuper); |
1da177e4 LT |
1631 | |
1632 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
1633 | sb->sb_csum = disk_csum; | |
1634 | return cpu_to_le32(csum); | |
1635 | } | |
1636 | ||
3cb03002 | 1637 | static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1638 | { |
1639 | struct mdp_superblock_1 *sb; | |
1640 | int ret; | |
0f420358 | 1641 | sector_t sb_start; |
c6563a8c | 1642 | sector_t sectors; |
1da177e4 | 1643 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; |
0002b271 | 1644 | int bmask; |
228fc7d7 | 1645 | bool spare_disk = true; |
1da177e4 LT |
1646 | |
1647 | /* | |
0f420358 | 1648 | * Calculate the position of the superblock in 512byte sectors. |
1da177e4 LT |
1649 | * It is always aligned to a 4K boundary and |
1650 | * depeding on minor_version, it can be: | |
1651 | * 0: At least 8K, but less than 12K, from end of device | |
1652 | * 1: At start of device | |
1653 | * 2: 4K from start of device. | |
1654 | */ | |
1655 | switch(minor_version) { | |
1656 | case 0: | |
77304d2a | 1657 | sb_start = i_size_read(rdev->bdev->bd_inode) >> 9; |
0f420358 AN |
1658 | sb_start -= 8*2; |
1659 | sb_start &= ~(sector_t)(4*2-1); | |
1da177e4 LT |
1660 | break; |
1661 | case 1: | |
0f420358 | 1662 | sb_start = 0; |
1da177e4 LT |
1663 | break; |
1664 | case 2: | |
0f420358 | 1665 | sb_start = 8; |
1da177e4 LT |
1666 | break; |
1667 | default: | |
1668 | return -EINVAL; | |
1669 | } | |
0f420358 | 1670 | rdev->sb_start = sb_start; |
1da177e4 | 1671 | |
0002b271 N |
1672 | /* superblock is rarely larger than 1K, but it can be larger, |
1673 | * and it is safe to read 4k, so we do that | |
1674 | */ | |
1675 | ret = read_disk_sb(rdev, 4096); | |
1da177e4 LT |
1676 | if (ret) return ret; |
1677 | ||
65a06f06 | 1678 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1679 | |
1680 | if (sb->magic != cpu_to_le32(MD_SB_MAGIC) || | |
1681 | sb->major_version != cpu_to_le32(1) || | |
1682 | le32_to_cpu(sb->max_dev) > (4096-256)/2 || | |
0f420358 | 1683 | le64_to_cpu(sb->super_offset) != rdev->sb_start || |
71c0805c | 1684 | (le32_to_cpu(sb->feature_map) & ~MD_FEATURE_ALL) != 0) |
1da177e4 LT |
1685 | return -EINVAL; |
1686 | ||
1687 | if (calc_sb_1_csum(sb) != sb->sb_csum) { | |
9d48739e | 1688 | pr_warn("md: invalid superblock checksum on %s\n", |
1da177e4 LT |
1689 | bdevname(rdev->bdev,b)); |
1690 | return -EINVAL; | |
1691 | } | |
1692 | if (le64_to_cpu(sb->data_size) < 10) { | |
9d48739e N |
1693 | pr_warn("md: data_size too small on %s\n", |
1694 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
1695 | return -EINVAL; |
1696 | } | |
c6563a8c N |
1697 | if (sb->pad0 || |
1698 | sb->pad3[0] || | |
1699 | memcmp(sb->pad3, sb->pad3+1, sizeof(sb->pad3) - sizeof(sb->pad3[1]))) | |
1700 | /* Some padding is non-zero, might be a new feature */ | |
1701 | return -EINVAL; | |
e11e93fa | 1702 | |
1da177e4 LT |
1703 | rdev->preferred_minor = 0xffff; |
1704 | rdev->data_offset = le64_to_cpu(sb->data_offset); | |
c6563a8c N |
1705 | rdev->new_data_offset = rdev->data_offset; |
1706 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE) && | |
1707 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) | |
1708 | rdev->new_data_offset += (s32)le32_to_cpu(sb->new_offset); | |
4dbcdc75 | 1709 | atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read)); |
1da177e4 | 1710 | |
0002b271 | 1711 | rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256; |
e1defc4f | 1712 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; |
0002b271 | 1713 | if (rdev->sb_size & bmask) |
a1801f85 N |
1714 | rdev->sb_size = (rdev->sb_size | bmask) + 1; |
1715 | ||
1716 | if (minor_version | |
0f420358 | 1717 | && rdev->data_offset < sb_start + (rdev->sb_size/512)) |
a1801f85 | 1718 | return -EINVAL; |
c6563a8c N |
1719 | if (minor_version |
1720 | && rdev->new_data_offset < sb_start + (rdev->sb_size/512)) | |
1721 | return -EINVAL; | |
0002b271 | 1722 | |
31b65a0d N |
1723 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH)) |
1724 | rdev->desc_nr = -1; | |
1725 | else | |
1726 | rdev->desc_nr = le32_to_cpu(sb->dev_number); | |
1727 | ||
2699b672 N |
1728 | if (!rdev->bb_page) { |
1729 | rdev->bb_page = alloc_page(GFP_KERNEL); | |
1730 | if (!rdev->bb_page) | |
1731 | return -ENOMEM; | |
1732 | } | |
1733 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BAD_BLOCKS) && | |
1734 | rdev->badblocks.count == 0) { | |
1735 | /* need to load the bad block list. | |
1736 | * Currently we limit it to one page. | |
1737 | */ | |
1738 | s32 offset; | |
1739 | sector_t bb_sector; | |
00485d09 | 1740 | __le64 *bbp; |
2699b672 N |
1741 | int i; |
1742 | int sectors = le16_to_cpu(sb->bblog_size); | |
1743 | if (sectors > (PAGE_SIZE / 512)) | |
1744 | return -EINVAL; | |
1745 | offset = le32_to_cpu(sb->bblog_offset); | |
1746 | if (offset == 0) | |
1747 | return -EINVAL; | |
1748 | bb_sector = (long long)offset; | |
1749 | if (!sync_page_io(rdev, bb_sector, sectors << 9, | |
796a5cf0 | 1750 | rdev->bb_page, REQ_OP_READ, 0, true)) |
2699b672 | 1751 | return -EIO; |
00485d09 | 1752 | bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
1753 | rdev->badblocks.shift = sb->bblog_shift; |
1754 | for (i = 0 ; i < (sectors << (9-3)) ; i++, bbp++) { | |
1755 | u64 bb = le64_to_cpu(*bbp); | |
1756 | int count = bb & (0x3ff); | |
1757 | u64 sector = bb >> 10; | |
1758 | sector <<= sb->bblog_shift; | |
1759 | count <<= sb->bblog_shift; | |
1760 | if (bb + 1 == 0) | |
1761 | break; | |
fc974ee2 | 1762 | if (badblocks_set(&rdev->badblocks, sector, count, 1)) |
2699b672 N |
1763 | return -EINVAL; |
1764 | } | |
486adf72 N |
1765 | } else if (sb->bblog_offset != 0) |
1766 | rdev->badblocks.shift = 0; | |
2699b672 | 1767 | |
ddc08823 PB |
1768 | if ((le32_to_cpu(sb->feature_map) & |
1769 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS))) { | |
ea0213e0 AP |
1770 | rdev->ppl.offset = (__s16)le16_to_cpu(sb->ppl.offset); |
1771 | rdev->ppl.size = le16_to_cpu(sb->ppl.size); | |
1772 | rdev->ppl.sector = rdev->sb_start + rdev->ppl.offset; | |
1773 | } | |
1774 | ||
33f2c35a N |
1775 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT) && |
1776 | sb->level != 0) | |
1777 | return -EINVAL; | |
1778 | ||
228fc7d7 YY |
1779 | /* not spare disk, or LEVEL_MULTIPATH */ |
1780 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH) || | |
1781 | (rdev->desc_nr >= 0 && | |
1782 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
1783 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || | |
1784 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL))) | |
1785 | spare_disk = false; | |
6a5cb53a | 1786 | |
9a7b2b0f | 1787 | if (!refdev) { |
228fc7d7 | 1788 | if (!spare_disk) |
6a5cb53a YY |
1789 | ret = 1; |
1790 | else | |
1791 | ret = 0; | |
9a7b2b0f | 1792 | } else { |
1da177e4 | 1793 | __u64 ev1, ev2; |
65a06f06 | 1794 | struct mdp_superblock_1 *refsb = page_address(refdev->sb_page); |
1da177e4 LT |
1795 | |
1796 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16) != 0 || | |
1797 | sb->level != refsb->level || | |
1798 | sb->layout != refsb->layout || | |
1799 | sb->chunksize != refsb->chunksize) { | |
9d48739e | 1800 | pr_warn("md: %s has strangely different superblock to %s\n", |
1da177e4 LT |
1801 | bdevname(rdev->bdev,b), |
1802 | bdevname(refdev->bdev,b2)); | |
1803 | return -EINVAL; | |
1804 | } | |
1805 | ev1 = le64_to_cpu(sb->events); | |
1806 | ev2 = le64_to_cpu(refsb->events); | |
1807 | ||
228fc7d7 | 1808 | if (!spare_disk && ev1 > ev2) |
8ed75463 N |
1809 | ret = 1; |
1810 | else | |
1811 | ret = 0; | |
1da177e4 | 1812 | } |
c6563a8c N |
1813 | if (minor_version) { |
1814 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9); | |
1815 | sectors -= rdev->data_offset; | |
1816 | } else | |
1817 | sectors = rdev->sb_start; | |
1818 | if (sectors < le64_to_cpu(sb->data_size)) | |
1da177e4 | 1819 | return -EINVAL; |
dd8ac336 | 1820 | rdev->sectors = le64_to_cpu(sb->data_size); |
8ed75463 | 1821 | return ret; |
1da177e4 LT |
1822 | } |
1823 | ||
fd01b88c | 1824 | static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 1825 | { |
65a06f06 | 1826 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
07d84d10 | 1827 | __u64 ev1 = le64_to_cpu(sb->events); |
1da177e4 | 1828 | |
41158c7e | 1829 | rdev->raid_disk = -1; |
c5d79adb N |
1830 | clear_bit(Faulty, &rdev->flags); |
1831 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1832 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1833 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1834 | |
1da177e4 LT |
1835 | if (mddev->raid_disks == 0) { |
1836 | mddev->major_version = 1; | |
1837 | mddev->patch_version = 0; | |
e691063a | 1838 | mddev->external = 0; |
9d8f0363 | 1839 | mddev->chunk_sectors = le32_to_cpu(sb->chunksize); |
9ebc6ef1 DD |
1840 | mddev->ctime = le64_to_cpu(sb->ctime); |
1841 | mddev->utime = le64_to_cpu(sb->utime); | |
1da177e4 | 1842 | mddev->level = le32_to_cpu(sb->level); |
d9d166c2 | 1843 | mddev->clevel[0] = 0; |
1da177e4 LT |
1844 | mddev->layout = le32_to_cpu(sb->layout); |
1845 | mddev->raid_disks = le32_to_cpu(sb->raid_disks); | |
58c0fed4 | 1846 | mddev->dev_sectors = le64_to_cpu(sb->size); |
07d84d10 | 1847 | mddev->events = ev1; |
c3d9714e | 1848 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1849 | mddev->bitmap_info.space = 0; |
1850 | /* Default location for bitmap is 1K after superblock | |
1851 | * using 3K - total of 4K | |
1852 | */ | |
c3d9714e | 1853 | mddev->bitmap_info.default_offset = 1024 >> 9; |
6409bb05 | 1854 | mddev->bitmap_info.default_space = (4096-1024) >> 9; |
2c810cdd N |
1855 | mddev->reshape_backwards = 0; |
1856 | ||
1da177e4 LT |
1857 | mddev->recovery_cp = le64_to_cpu(sb->resync_offset); |
1858 | memcpy(mddev->uuid, sb->set_uuid, 16); | |
1859 | ||
1860 | mddev->max_disks = (4096-256)/2; | |
a654b9d8 | 1861 | |
71c0805c | 1862 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) && |
6409bb05 | 1863 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1864 | mddev->bitmap_info.offset = |
1865 | (__s32)le32_to_cpu(sb->bitmap_offset); | |
6409bb05 N |
1866 | /* Metadata doesn't record how much space is available. |
1867 | * For 1.0, we assume we can use up to the superblock | |
1868 | * if before, else to 4K beyond superblock. | |
1869 | * For others, assume no change is possible. | |
1870 | */ | |
1871 | if (mddev->minor_version > 0) | |
1872 | mddev->bitmap_info.space = 0; | |
1873 | else if (mddev->bitmap_info.offset > 0) | |
1874 | mddev->bitmap_info.space = | |
1875 | 8 - mddev->bitmap_info.offset; | |
1876 | else | |
1877 | mddev->bitmap_info.space = | |
1878 | -mddev->bitmap_info.offset; | |
1879 | } | |
e11e93fa | 1880 | |
f6705578 N |
1881 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { |
1882 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); | |
1883 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); | |
1884 | mddev->new_level = le32_to_cpu(sb->new_level); | |
1885 | mddev->new_layout = le32_to_cpu(sb->new_layout); | |
664e7c41 | 1886 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_chunk); |
2c810cdd N |
1887 | if (mddev->delta_disks < 0 || |
1888 | (mddev->delta_disks == 0 && | |
1889 | (le32_to_cpu(sb->feature_map) | |
1890 | & MD_FEATURE_RESHAPE_BACKWARDS))) | |
1891 | mddev->reshape_backwards = 1; | |
f6705578 N |
1892 | } else { |
1893 | mddev->reshape_position = MaxSector; | |
1894 | mddev->delta_disks = 0; | |
1895 | mddev->new_level = mddev->level; | |
1896 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1897 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1898 | } |
1899 | ||
33f2c35a N |
1900 | if (mddev->level == 0 && |
1901 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT)) | |
1902 | mddev->layout = -1; | |
1903 | ||
486b0f7b | 1904 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL) |
a62ab49e | 1905 | set_bit(MD_HAS_JOURNAL, &mddev->flags); |
ea0213e0 | 1906 | |
ddc08823 PB |
1907 | if (le32_to_cpu(sb->feature_map) & |
1908 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS)) { | |
ea0213e0 AP |
1909 | if (le32_to_cpu(sb->feature_map) & |
1910 | (MD_FEATURE_BITMAP_OFFSET | MD_FEATURE_JOURNAL)) | |
1911 | return -EINVAL; | |
ddc08823 PB |
1912 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_PPL) && |
1913 | (le32_to_cpu(sb->feature_map) & | |
1914 | MD_FEATURE_MULTIPLE_PPLS)) | |
1915 | return -EINVAL; | |
ea0213e0 AP |
1916 | set_bit(MD_HAS_PPL, &mddev->flags); |
1917 | } | |
41158c7e | 1918 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1919 | /* Insist of good event counter while assembling, except for |
1920 | * spares (which don't need an event count) */ | |
1da177e4 | 1921 | ++ev1; |
be6800a7 N |
1922 | if (rdev->desc_nr >= 0 && |
1923 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
a3dfbdaa SL |
1924 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || |
1925 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL)) | |
be6800a7 N |
1926 | if (ev1 < mddev->events) |
1927 | return -EINVAL; | |
41158c7e N |
1928 | } else if (mddev->bitmap) { |
1929 | /* If adding to array with a bitmap, then we can accept an | |
1930 | * older device, but not too old. | |
1931 | */ | |
41158c7e N |
1932 | if (ev1 < mddev->bitmap->events_cleared) |
1933 | return 0; | |
8313b8e5 N |
1934 | if (ev1 < mddev->events) |
1935 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1936 | } else { |
1937 | if (ev1 < mddev->events) | |
1938 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1939 | return 0; | |
1940 | } | |
1da177e4 LT |
1941 | if (mddev->level != LEVEL_MULTIPATH) { |
1942 | int role; | |
3673f305 N |
1943 | if (rdev->desc_nr < 0 || |
1944 | rdev->desc_nr >= le32_to_cpu(sb->max_dev)) { | |
c4d4c91b | 1945 | role = MD_DISK_ROLE_SPARE; |
3673f305 N |
1946 | rdev->desc_nr = -1; |
1947 | } else | |
1948 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
1da177e4 | 1949 | switch(role) { |
c4d4c91b | 1950 | case MD_DISK_ROLE_SPARE: /* spare */ |
1da177e4 | 1951 | break; |
c4d4c91b | 1952 | case MD_DISK_ROLE_FAULTY: /* faulty */ |
b2d444d7 | 1953 | set_bit(Faulty, &rdev->flags); |
1da177e4 | 1954 | break; |
bac624f3 SL |
1955 | case MD_DISK_ROLE_JOURNAL: /* journal device */ |
1956 | if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL)) { | |
1957 | /* journal device without journal feature */ | |
9d48739e | 1958 | pr_warn("md: journal device provided without journal feature, ignoring the device\n"); |
bac624f3 SL |
1959 | return -EINVAL; |
1960 | } | |
1961 | set_bit(Journal, &rdev->flags); | |
3069aa8d | 1962 | rdev->journal_tail = le64_to_cpu(sb->journal_tail); |
9b15603d | 1963 | rdev->raid_disk = 0; |
bac624f3 | 1964 | break; |
1da177e4 | 1965 | default: |
f466722c | 1966 | rdev->saved_raid_disk = role; |
5fd6c1dc | 1967 | if ((le32_to_cpu(sb->feature_map) & |
f466722c | 1968 | MD_FEATURE_RECOVERY_OFFSET)) { |
5fd6c1dc | 1969 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); |
f466722c N |
1970 | if (!(le32_to_cpu(sb->feature_map) & |
1971 | MD_FEATURE_RECOVERY_BITMAP)) | |
1972 | rdev->saved_raid_disk = -1; | |
062f5b2a GJ |
1973 | } else { |
1974 | /* | |
1975 | * If the array is FROZEN, then the device can't | |
1976 | * be in_sync with rest of array. | |
1977 | */ | |
1978 | if (!test_bit(MD_RECOVERY_FROZEN, | |
1979 | &mddev->recovery)) | |
1980 | set_bit(In_sync, &rdev->flags); | |
1981 | } | |
1da177e4 LT |
1982 | rdev->raid_disk = role; |
1983 | break; | |
1984 | } | |
8ddf9efe N |
1985 | if (sb->devflags & WriteMostly1) |
1986 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1987 | if (sb->devflags & FailFast1) |
1988 | set_bit(FailFast, &rdev->flags); | |
2d78f8c4 N |
1989 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) |
1990 | set_bit(Replacement, &rdev->flags); | |
41158c7e | 1991 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1992 | set_bit(In_sync, &rdev->flags); |
41158c7e | 1993 | |
1da177e4 LT |
1994 | return 0; |
1995 | } | |
1996 | ||
fd01b88c | 1997 | static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1998 | { |
1999 | struct mdp_superblock_1 *sb; | |
3cb03002 | 2000 | struct md_rdev *rdev2; |
1da177e4 LT |
2001 | int max_dev, i; |
2002 | /* make rdev->sb match mddev and rdev data. */ | |
2003 | ||
65a06f06 | 2004 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
2005 | |
2006 | sb->feature_map = 0; | |
2007 | sb->pad0 = 0; | |
5fd6c1dc | 2008 | sb->recovery_offset = cpu_to_le64(0); |
1da177e4 LT |
2009 | memset(sb->pad3, 0, sizeof(sb->pad3)); |
2010 | ||
2011 | sb->utime = cpu_to_le64((__u64)mddev->utime); | |
2012 | sb->events = cpu_to_le64(mddev->events); | |
2013 | if (mddev->in_sync) | |
2014 | sb->resync_offset = cpu_to_le64(mddev->recovery_cp); | |
bd18f646 SL |
2015 | else if (test_bit(MD_JOURNAL_CLEAN, &mddev->flags)) |
2016 | sb->resync_offset = cpu_to_le64(MaxSector); | |
1da177e4 LT |
2017 | else |
2018 | sb->resync_offset = cpu_to_le64(0); | |
2019 | ||
1c05b4bc | 2020 | sb->cnt_corrected_read = cpu_to_le32(atomic_read(&rdev->corrected_errors)); |
4dbcdc75 | 2021 | |
f0ca340c | 2022 | sb->raid_disks = cpu_to_le32(mddev->raid_disks); |
58c0fed4 | 2023 | sb->size = cpu_to_le64(mddev->dev_sectors); |
9d8f0363 | 2024 | sb->chunksize = cpu_to_le32(mddev->chunk_sectors); |
62e1e389 N |
2025 | sb->level = cpu_to_le32(mddev->level); |
2026 | sb->layout = cpu_to_le32(mddev->layout); | |
688834e6 N |
2027 | if (test_bit(FailFast, &rdev->flags)) |
2028 | sb->devflags |= FailFast1; | |
2029 | else | |
2030 | sb->devflags &= ~FailFast1; | |
f0ca340c | 2031 | |
aeb9b211 N |
2032 | if (test_bit(WriteMostly, &rdev->flags)) |
2033 | sb->devflags |= WriteMostly1; | |
2034 | else | |
2035 | sb->devflags &= ~WriteMostly1; | |
c6563a8c N |
2036 | sb->data_offset = cpu_to_le64(rdev->data_offset); |
2037 | sb->data_size = cpu_to_le64(rdev->sectors); | |
aeb9b211 | 2038 | |
c3d9714e N |
2039 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) { |
2040 | sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset); | |
71c0805c | 2041 | sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); |
a654b9d8 | 2042 | } |
5fd6c1dc | 2043 | |
f2076e7d | 2044 | if (rdev->raid_disk >= 0 && !test_bit(Journal, &rdev->flags) && |
97e4f42d | 2045 | !test_bit(In_sync, &rdev->flags)) { |
93be75ff N |
2046 | sb->feature_map |= |
2047 | cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET); | |
2048 | sb->recovery_offset = | |
2049 | cpu_to_le64(rdev->recovery_offset); | |
f466722c N |
2050 | if (rdev->saved_raid_disk >= 0 && mddev->bitmap) |
2051 | sb->feature_map |= | |
2052 | cpu_to_le32(MD_FEATURE_RECOVERY_BITMAP); | |
5fd6c1dc | 2053 | } |
3069aa8d SL |
2054 | /* Note: recovery_offset and journal_tail share space */ |
2055 | if (test_bit(Journal, &rdev->flags)) | |
2056 | sb->journal_tail = cpu_to_le64(rdev->journal_tail); | |
2d78f8c4 N |
2057 | if (test_bit(Replacement, &rdev->flags)) |
2058 | sb->feature_map |= | |
2059 | cpu_to_le32(MD_FEATURE_REPLACEMENT); | |
5fd6c1dc | 2060 | |
f6705578 N |
2061 | if (mddev->reshape_position != MaxSector) { |
2062 | sb->feature_map |= cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); | |
2063 | sb->reshape_position = cpu_to_le64(mddev->reshape_position); | |
2064 | sb->new_layout = cpu_to_le32(mddev->new_layout); | |
2065 | sb->delta_disks = cpu_to_le32(mddev->delta_disks); | |
2066 | sb->new_level = cpu_to_le32(mddev->new_level); | |
664e7c41 | 2067 | sb->new_chunk = cpu_to_le32(mddev->new_chunk_sectors); |
2c810cdd N |
2068 | if (mddev->delta_disks == 0 && |
2069 | mddev->reshape_backwards) | |
2070 | sb->feature_map | |
2071 | |= cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS); | |
c6563a8c N |
2072 | if (rdev->new_data_offset != rdev->data_offset) { |
2073 | sb->feature_map | |
2074 | |= cpu_to_le32(MD_FEATURE_NEW_OFFSET); | |
2075 | sb->new_offset = cpu_to_le32((__u32)(rdev->new_data_offset | |
2076 | - rdev->data_offset)); | |
2077 | } | |
f6705578 | 2078 | } |
a654b9d8 | 2079 | |
3c462c88 GR |
2080 | if (mddev_is_clustered(mddev)) |
2081 | sb->feature_map |= cpu_to_le32(MD_FEATURE_CLUSTERED); | |
2082 | ||
2699b672 N |
2083 | if (rdev->badblocks.count == 0) |
2084 | /* Nothing to do for bad blocks*/ ; | |
2085 | else if (sb->bblog_offset == 0) | |
2086 | /* Cannot record bad blocks on this device */ | |
2087 | md_error(mddev, rdev); | |
2088 | else { | |
2089 | struct badblocks *bb = &rdev->badblocks; | |
ae50640b | 2090 | __le64 *bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
2091 | u64 *p = bb->page; |
2092 | sb->feature_map |= cpu_to_le32(MD_FEATURE_BAD_BLOCKS); | |
2093 | if (bb->changed) { | |
2094 | unsigned seq; | |
2095 | ||
2096 | retry: | |
2097 | seq = read_seqbegin(&bb->lock); | |
2098 | ||
2099 | memset(bbp, 0xff, PAGE_SIZE); | |
2100 | ||
2101 | for (i = 0 ; i < bb->count ; i++) { | |
35f9ac2d | 2102 | u64 internal_bb = p[i]; |
2699b672 N |
2103 | u64 store_bb = ((BB_OFFSET(internal_bb) << 10) |
2104 | | BB_LEN(internal_bb)); | |
35f9ac2d | 2105 | bbp[i] = cpu_to_le64(store_bb); |
2699b672 | 2106 | } |
d0962936 | 2107 | bb->changed = 0; |
2699b672 N |
2108 | if (read_seqretry(&bb->lock, seq)) |
2109 | goto retry; | |
2110 | ||
2111 | bb->sector = (rdev->sb_start + | |
2112 | (int)le32_to_cpu(sb->bblog_offset)); | |
2113 | bb->size = le16_to_cpu(sb->bblog_size); | |
2699b672 N |
2114 | } |
2115 | } | |
2116 | ||
1da177e4 | 2117 | max_dev = 0; |
dafb20fa | 2118 | rdev_for_each(rdev2, mddev) |
1da177e4 LT |
2119 | if (rdev2->desc_nr+1 > max_dev) |
2120 | max_dev = rdev2->desc_nr+1; | |
a778b73f | 2121 | |
70471daf N |
2122 | if (max_dev > le32_to_cpu(sb->max_dev)) { |
2123 | int bmask; | |
a778b73f | 2124 | sb->max_dev = cpu_to_le32(max_dev); |
70471daf N |
2125 | rdev->sb_size = max_dev * 2 + 256; |
2126 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; | |
2127 | if (rdev->sb_size & bmask) | |
2128 | rdev->sb_size = (rdev->sb_size | bmask) + 1; | |
ddcf3522 N |
2129 | } else |
2130 | max_dev = le32_to_cpu(sb->max_dev); | |
2131 | ||
1da177e4 | 2132 | for (i=0; i<max_dev;i++) |
8df72024 | 2133 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
f72ffdd6 | 2134 | |
a97b7896 SL |
2135 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) |
2136 | sb->feature_map |= cpu_to_le32(MD_FEATURE_JOURNAL); | |
f72ffdd6 | 2137 | |
ea0213e0 | 2138 | if (test_bit(MD_HAS_PPL, &mddev->flags)) { |
ddc08823 PB |
2139 | if (test_bit(MD_HAS_MULTIPLE_PPLS, &mddev->flags)) |
2140 | sb->feature_map |= | |
2141 | cpu_to_le32(MD_FEATURE_MULTIPLE_PPLS); | |
2142 | else | |
2143 | sb->feature_map |= cpu_to_le32(MD_FEATURE_PPL); | |
ea0213e0 AP |
2144 | sb->ppl.offset = cpu_to_le16(rdev->ppl.offset); |
2145 | sb->ppl.size = cpu_to_le16(rdev->ppl.size); | |
2146 | } | |
2147 | ||
dafb20fa | 2148 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 2149 | i = rdev2->desc_nr; |
b2d444d7 | 2150 | if (test_bit(Faulty, &rdev2->flags)) |
c4d4c91b | 2151 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY); |
b2d444d7 | 2152 | else if (test_bit(In_sync, &rdev2->flags)) |
1da177e4 | 2153 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
a97b7896 | 2154 | else if (test_bit(Journal, &rdev2->flags)) |
bac624f3 | 2155 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_JOURNAL); |
93be75ff | 2156 | else if (rdev2->raid_disk >= 0) |
5fd6c1dc | 2157 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
1da177e4 | 2158 | else |
c4d4c91b | 2159 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
1da177e4 LT |
2160 | } |
2161 | ||
1da177e4 LT |
2162 | sb->sb_csum = calc_sb_1_csum(sb); |
2163 | } | |
2164 | ||
d9c0fa50 XN |
2165 | static sector_t super_1_choose_bm_space(sector_t dev_size) |
2166 | { | |
2167 | sector_t bm_space; | |
2168 | ||
2169 | /* if the device is bigger than 8Gig, save 64k for bitmap | |
2170 | * usage, if bigger than 200Gig, save 128k | |
2171 | */ | |
2172 | if (dev_size < 64*2) | |
2173 | bm_space = 0; | |
2174 | else if (dev_size - 64*2 >= 200*1024*1024*2) | |
2175 | bm_space = 128*2; | |
2176 | else if (dev_size - 4*2 > 8*1024*1024*2) | |
2177 | bm_space = 64*2; | |
2178 | else | |
2179 | bm_space = 4*2; | |
2180 | return bm_space; | |
2181 | } | |
2182 | ||
0cd17fec | 2183 | static unsigned long long |
3cb03002 | 2184 | super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec CW |
2185 | { |
2186 | struct mdp_superblock_1 *sb; | |
15f4a5fd | 2187 | sector_t max_sectors; |
58c0fed4 | 2188 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 2189 | return 0; /* component must fit device */ |
c6563a8c N |
2190 | if (rdev->data_offset != rdev->new_data_offset) |
2191 | return 0; /* too confusing */ | |
0f420358 | 2192 | if (rdev->sb_start < rdev->data_offset) { |
0cd17fec | 2193 | /* minor versions 1 and 2; superblock before data */ |
77304d2a | 2194 | max_sectors = i_size_read(rdev->bdev->bd_inode) >> 9; |
15f4a5fd AN |
2195 | max_sectors -= rdev->data_offset; |
2196 | if (!num_sectors || num_sectors > max_sectors) | |
2197 | num_sectors = max_sectors; | |
c3d9714e | 2198 | } else if (rdev->mddev->bitmap_info.offset) { |
0cd17fec CW |
2199 | /* minor version 0 with bitmap we can't move */ |
2200 | return 0; | |
2201 | } else { | |
2202 | /* minor version 0; superblock after data */ | |
d9c0fa50 XN |
2203 | sector_t sb_start, bm_space; |
2204 | sector_t dev_size = i_size_read(rdev->bdev->bd_inode) >> 9; | |
2205 | ||
2206 | /* 8K is for superblock */ | |
2207 | sb_start = dev_size - 8*2; | |
0f420358 | 2208 | sb_start &= ~(sector_t)(4*2 - 1); |
d9c0fa50 XN |
2209 | |
2210 | bm_space = super_1_choose_bm_space(dev_size); | |
2211 | ||
2212 | /* Space that can be used to store date needs to decrease | |
2213 | * superblock bitmap space and bad block space(4K) | |
2214 | */ | |
2215 | max_sectors = sb_start - bm_space - 4*2; | |
2216 | ||
15f4a5fd AN |
2217 | if (!num_sectors || num_sectors > max_sectors) |
2218 | num_sectors = max_sectors; | |
0cd17fec | 2219 | } |
65a06f06 | 2220 | sb = page_address(rdev->sb_page); |
15f4a5fd | 2221 | sb->data_size = cpu_to_le64(num_sectors); |
3fb632e4 | 2222 | sb->super_offset = cpu_to_le64(rdev->sb_start); |
0cd17fec | 2223 | sb->sb_csum = calc_sb_1_csum(sb); |
46533ff7 N |
2224 | do { |
2225 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
2226 | rdev->sb_page); | |
2227 | } while (md_super_wait(rdev->mddev) < 0); | |
c26a44ed | 2228 | return num_sectors; |
c6563a8c N |
2229 | |
2230 | } | |
2231 | ||
2232 | static int | |
2233 | super_1_allow_new_offset(struct md_rdev *rdev, | |
2234 | unsigned long long new_offset) | |
2235 | { | |
2236 | /* All necessary checks on new >= old have been done */ | |
2237 | struct bitmap *bitmap; | |
2238 | if (new_offset >= rdev->data_offset) | |
2239 | return 1; | |
2240 | ||
2241 | /* with 1.0 metadata, there is no metadata to tread on | |
2242 | * so we can always move back */ | |
2243 | if (rdev->mddev->minor_version == 0) | |
2244 | return 1; | |
2245 | ||
2246 | /* otherwise we must be sure not to step on | |
2247 | * any metadata, so stay: | |
2248 | * 36K beyond start of superblock | |
2249 | * beyond end of badblocks | |
2250 | * beyond write-intent bitmap | |
2251 | */ | |
2252 | if (rdev->sb_start + (32+4)*2 > new_offset) | |
2253 | return 0; | |
2254 | bitmap = rdev->mddev->bitmap; | |
2255 | if (bitmap && !rdev->mddev->bitmap_info.file && | |
2256 | rdev->sb_start + rdev->mddev->bitmap_info.offset + | |
1ec885cd | 2257 | bitmap->storage.file_pages * (PAGE_SIZE>>9) > new_offset) |
c6563a8c N |
2258 | return 0; |
2259 | if (rdev->badblocks.sector + rdev->badblocks.size > new_offset) | |
2260 | return 0; | |
2261 | ||
2262 | return 1; | |
0cd17fec | 2263 | } |
1da177e4 | 2264 | |
75c96f85 | 2265 | static struct super_type super_types[] = { |
1da177e4 LT |
2266 | [0] = { |
2267 | .name = "0.90.0", | |
2268 | .owner = THIS_MODULE, | |
0cd17fec CW |
2269 | .load_super = super_90_load, |
2270 | .validate_super = super_90_validate, | |
2271 | .sync_super = super_90_sync, | |
2272 | .rdev_size_change = super_90_rdev_size_change, | |
c6563a8c | 2273 | .allow_new_offset = super_90_allow_new_offset, |
1da177e4 LT |
2274 | }, |
2275 | [1] = { | |
2276 | .name = "md-1", | |
2277 | .owner = THIS_MODULE, | |
0cd17fec CW |
2278 | .load_super = super_1_load, |
2279 | .validate_super = super_1_validate, | |
2280 | .sync_super = super_1_sync, | |
2281 | .rdev_size_change = super_1_rdev_size_change, | |
c6563a8c | 2282 | .allow_new_offset = super_1_allow_new_offset, |
1da177e4 LT |
2283 | }, |
2284 | }; | |
1da177e4 | 2285 | |
fd01b88c | 2286 | static void sync_super(struct mddev *mddev, struct md_rdev *rdev) |
076f968b JB |
2287 | { |
2288 | if (mddev->sync_super) { | |
2289 | mddev->sync_super(mddev, rdev); | |
2290 | return; | |
2291 | } | |
2292 | ||
2293 | BUG_ON(mddev->major_version >= ARRAY_SIZE(super_types)); | |
2294 | ||
2295 | super_types[mddev->major_version].sync_super(mddev, rdev); | |
2296 | } | |
2297 | ||
fd01b88c | 2298 | static int match_mddev_units(struct mddev *mddev1, struct mddev *mddev2) |
1da177e4 | 2299 | { |
3cb03002 | 2300 | struct md_rdev *rdev, *rdev2; |
1da177e4 | 2301 | |
4b80991c | 2302 | rcu_read_lock(); |
0b020e85 SL |
2303 | rdev_for_each_rcu(rdev, mddev1) { |
2304 | if (test_bit(Faulty, &rdev->flags) || | |
2305 | test_bit(Journal, &rdev->flags) || | |
2306 | rdev->raid_disk == -1) | |
2307 | continue; | |
2308 | rdev_for_each_rcu(rdev2, mddev2) { | |
2309 | if (test_bit(Faulty, &rdev2->flags) || | |
2310 | test_bit(Journal, &rdev2->flags) || | |
2311 | rdev2->raid_disk == -1) | |
2312 | continue; | |
61a27e1f | 2313 | if (rdev->bdev->bd_disk == rdev2->bdev->bd_disk) { |
4b80991c | 2314 | rcu_read_unlock(); |
7dd5e7c3 | 2315 | return 1; |
4b80991c | 2316 | } |
0b020e85 SL |
2317 | } |
2318 | } | |
4b80991c | 2319 | rcu_read_unlock(); |
1da177e4 LT |
2320 | return 0; |
2321 | } | |
2322 | ||
2323 | static LIST_HEAD(pending_raid_disks); | |
2324 | ||
ac5e7113 AN |
2325 | /* |
2326 | * Try to register data integrity profile for an mddev | |
2327 | * | |
2328 | * This is called when an array is started and after a disk has been kicked | |
2329 | * from the array. It only succeeds if all working and active component devices | |
2330 | * are integrity capable with matching profiles. | |
2331 | */ | |
fd01b88c | 2332 | int md_integrity_register(struct mddev *mddev) |
ac5e7113 | 2333 | { |
3cb03002 | 2334 | struct md_rdev *rdev, *reference = NULL; |
ac5e7113 AN |
2335 | |
2336 | if (list_empty(&mddev->disks)) | |
2337 | return 0; /* nothing to do */ | |
629acb6a JB |
2338 | if (!mddev->gendisk || blk_get_integrity(mddev->gendisk)) |
2339 | return 0; /* shouldn't register, or already is */ | |
dafb20fa | 2340 | rdev_for_each(rdev, mddev) { |
ac5e7113 AN |
2341 | /* skip spares and non-functional disks */ |
2342 | if (test_bit(Faulty, &rdev->flags)) | |
2343 | continue; | |
2344 | if (rdev->raid_disk < 0) | |
2345 | continue; | |
ac5e7113 AN |
2346 | if (!reference) { |
2347 | /* Use the first rdev as the reference */ | |
2348 | reference = rdev; | |
2349 | continue; | |
2350 | } | |
2351 | /* does this rdev's profile match the reference profile? */ | |
2352 | if (blk_integrity_compare(reference->bdev->bd_disk, | |
2353 | rdev->bdev->bd_disk) < 0) | |
2354 | return -EINVAL; | |
2355 | } | |
89078d57 MP |
2356 | if (!reference || !bdev_get_integrity(reference->bdev)) |
2357 | return 0; | |
ac5e7113 AN |
2358 | /* |
2359 | * All component devices are integrity capable and have matching | |
2360 | * profiles, register the common profile for the md device. | |
2361 | */ | |
25520d55 MP |
2362 | blk_integrity_register(mddev->gendisk, |
2363 | bdev_get_integrity(reference->bdev)); | |
2364 | ||
9d48739e | 2365 | pr_debug("md: data integrity enabled on %s\n", mdname(mddev)); |
afeee514 | 2366 | if (bioset_integrity_create(&mddev->bio_set, BIO_POOL_SIZE)) { |
9d48739e | 2367 | pr_err("md: failed to create integrity pool for %s\n", |
a91a2785 MP |
2368 | mdname(mddev)); |
2369 | return -EINVAL; | |
2370 | } | |
ac5e7113 AN |
2371 | return 0; |
2372 | } | |
2373 | EXPORT_SYMBOL(md_integrity_register); | |
2374 | ||
1501efad DW |
2375 | /* |
2376 | * Attempt to add an rdev, but only if it is consistent with the current | |
2377 | * integrity profile | |
2378 | */ | |
2379 | int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev) | |
3f9d99c1 | 2380 | { |
2863b9eb | 2381 | struct blk_integrity *bi_mddev; |
1501efad | 2382 | char name[BDEVNAME_SIZE]; |
2863b9eb JB |
2383 | |
2384 | if (!mddev->gendisk) | |
1501efad | 2385 | return 0; |
2863b9eb | 2386 | |
2863b9eb | 2387 | bi_mddev = blk_get_integrity(mddev->gendisk); |
3f9d99c1 | 2388 | |
ac5e7113 | 2389 | if (!bi_mddev) /* nothing to do */ |
1501efad DW |
2390 | return 0; |
2391 | ||
2392 | if (blk_integrity_compare(mddev->gendisk, rdev->bdev->bd_disk) != 0) { | |
9d48739e N |
2393 | pr_err("%s: incompatible integrity profile for %s\n", |
2394 | mdname(mddev), bdevname(rdev->bdev, name)); | |
1501efad DW |
2395 | return -ENXIO; |
2396 | } | |
2397 | ||
2398 | return 0; | |
3f9d99c1 | 2399 | } |
ac5e7113 | 2400 | EXPORT_SYMBOL(md_integrity_add_rdev); |
3f9d99c1 | 2401 | |
d7a47838 CH |
2402 | static bool rdev_read_only(struct md_rdev *rdev) |
2403 | { | |
2404 | return bdev_read_only(rdev->bdev) || | |
2405 | (rdev->meta_bdev && bdev_read_only(rdev->meta_bdev)); | |
2406 | } | |
2407 | ||
f72ffdd6 | 2408 | static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) |
1da177e4 | 2409 | { |
7dd5e7c3 | 2410 | char b[BDEVNAME_SIZE]; |
5e55e2f5 | 2411 | int err; |
1da177e4 | 2412 | |
11e2ede0 DW |
2413 | /* prevent duplicates */ |
2414 | if (find_rdev(mddev, rdev->bdev->bd_dev)) | |
2415 | return -EEXIST; | |
2416 | ||
d7a47838 | 2417 | if (rdev_read_only(rdev) && mddev->pers) |
97b20ef7 N |
2418 | return -EROFS; |
2419 | ||
dd8ac336 | 2420 | /* make sure rdev->sectors exceeds mddev->dev_sectors */ |
f6b6ec5c SL |
2421 | if (!test_bit(Journal, &rdev->flags) && |
2422 | rdev->sectors && | |
2423 | (mddev->dev_sectors == 0 || rdev->sectors < mddev->dev_sectors)) { | |
a778b73f N |
2424 | if (mddev->pers) { |
2425 | /* Cannot change size, so fail | |
2426 | * If mddev->level <= 0, then we don't care | |
2427 | * about aligning sizes (e.g. linear) | |
2428 | */ | |
2429 | if (mddev->level > 0) | |
2430 | return -ENOSPC; | |
2431 | } else | |
dd8ac336 | 2432 | mddev->dev_sectors = rdev->sectors; |
2bf071bf | 2433 | } |
1da177e4 LT |
2434 | |
2435 | /* Verify rdev->desc_nr is unique. | |
2436 | * If it is -1, assign a free number, else | |
2437 | * check number is not in use | |
2438 | */ | |
4878e9eb | 2439 | rcu_read_lock(); |
1da177e4 LT |
2440 | if (rdev->desc_nr < 0) { |
2441 | int choice = 0; | |
4878e9eb N |
2442 | if (mddev->pers) |
2443 | choice = mddev->raid_disks; | |
57d051dc | 2444 | while (md_find_rdev_nr_rcu(mddev, choice)) |
1da177e4 LT |
2445 | choice++; |
2446 | rdev->desc_nr = choice; | |
2447 | } else { | |
57d051dc | 2448 | if (md_find_rdev_nr_rcu(mddev, rdev->desc_nr)) { |
4878e9eb | 2449 | rcu_read_unlock(); |
1da177e4 | 2450 | return -EBUSY; |
4878e9eb | 2451 | } |
1da177e4 | 2452 | } |
4878e9eb | 2453 | rcu_read_unlock(); |
f6b6ec5c SL |
2454 | if (!test_bit(Journal, &rdev->flags) && |
2455 | mddev->max_disks && rdev->desc_nr >= mddev->max_disks) { | |
9d48739e N |
2456 | pr_warn("md: %s: array is limited to %d devices\n", |
2457 | mdname(mddev), mddev->max_disks); | |
de01dfad N |
2458 | return -EBUSY; |
2459 | } | |
19133a42 | 2460 | bdevname(rdev->bdev,b); |
90a9befb | 2461 | strreplace(b, '/', '!'); |
649316b2 | 2462 | |
1da177e4 | 2463 | rdev->mddev = mddev; |
9d48739e | 2464 | pr_debug("md: bind<%s>\n", b); |
86e6ffdd | 2465 | |
963c555e | 2466 | if (mddev->raid_disks) |
404659cf | 2467 | mddev_create_serial_pool(mddev, rdev, false); |
963c555e | 2468 | |
b2d6db58 | 2469 | if ((err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b))) |
5e55e2f5 | 2470 | goto fail; |
86e6ffdd | 2471 | |
5e3b8a8d | 2472 | /* failure here is OK */ |
8d65269f | 2473 | err = sysfs_create_link(&rdev->kobj, bdev_kobj(rdev->bdev), "block"); |
00bcb4ac | 2474 | rdev->sysfs_state = sysfs_get_dirent_safe(rdev->kobj.sd, "state"); |
e1a86dbb JB |
2475 | rdev->sysfs_unack_badblocks = |
2476 | sysfs_get_dirent_safe(rdev->kobj.sd, "unacknowledged_bad_blocks"); | |
2477 | rdev->sysfs_badblocks = | |
2478 | sysfs_get_dirent_safe(rdev->kobj.sd, "bad_blocks"); | |
3c0ee63a | 2479 | |
4b80991c | 2480 | list_add_rcu(&rdev->same_set, &mddev->disks); |
e09b457b | 2481 | bd_link_disk_holder(rdev->bdev, mddev->gendisk); |
4044ba58 N |
2482 | |
2483 | /* May as well allow recovery to be retried once */ | |
5389042f | 2484 | mddev->recovery_disabled++; |
3f9d99c1 | 2485 | |
1da177e4 | 2486 | return 0; |
5e55e2f5 N |
2487 | |
2488 | fail: | |
9d48739e N |
2489 | pr_warn("md: failed to register dev-%s for %s\n", |
2490 | b, mdname(mddev)); | |
5e55e2f5 | 2491 | return err; |
1da177e4 LT |
2492 | } |
2493 | ||
cc1ffe61 | 2494 | static void rdev_delayed_delete(struct work_struct *ws) |
5792a285 | 2495 | { |
3cb03002 | 2496 | struct md_rdev *rdev = container_of(ws, struct md_rdev, del_work); |
5792a285 | 2497 | kobject_del(&rdev->kobj); |
177a99b2 | 2498 | kobject_put(&rdev->kobj); |
5792a285 N |
2499 | } |
2500 | ||
f72ffdd6 | 2501 | static void unbind_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2502 | { |
2503 | char b[BDEVNAME_SIZE]; | |
403df478 | 2504 | |
49731baa | 2505 | bd_unlink_disk_holder(rdev->bdev, rdev->mddev->gendisk); |
4b80991c | 2506 | list_del_rcu(&rdev->same_set); |
9d48739e | 2507 | pr_debug("md: unbind<%s>\n", bdevname(rdev->bdev,b)); |
11d3a9f6 | 2508 | mddev_destroy_serial_pool(rdev->mddev, rdev, false); |
1da177e4 | 2509 | rdev->mddev = NULL; |
86e6ffdd | 2510 | sysfs_remove_link(&rdev->kobj, "block"); |
3c0ee63a | 2511 | sysfs_put(rdev->sysfs_state); |
e1a86dbb JB |
2512 | sysfs_put(rdev->sysfs_unack_badblocks); |
2513 | sysfs_put(rdev->sysfs_badblocks); | |
3c0ee63a | 2514 | rdev->sysfs_state = NULL; |
e1a86dbb JB |
2515 | rdev->sysfs_unack_badblocks = NULL; |
2516 | rdev->sysfs_badblocks = NULL; | |
2230dfe4 | 2517 | rdev->badblocks.count = 0; |
5792a285 | 2518 | /* We need to delay this, otherwise we can deadlock when |
4b80991c N |
2519 | * writing to 'remove' to "dev/state". We also need |
2520 | * to delay it due to rcu usage. | |
5792a285 | 2521 | */ |
4b80991c | 2522 | synchronize_rcu(); |
cc1ffe61 | 2523 | INIT_WORK(&rdev->del_work, rdev_delayed_delete); |
177a99b2 | 2524 | kobject_get(&rdev->kobj); |
cc1ffe61 | 2525 | queue_work(md_rdev_misc_wq, &rdev->del_work); |
1da177e4 LT |
2526 | } |
2527 | ||
2528 | /* | |
2529 | * prevent the device from being mounted, repartitioned or | |
2530 | * otherwise reused by a RAID array (or any other kernel | |
2531 | * subsystem), by bd_claiming the device. | |
2532 | */ | |
3cb03002 | 2533 | static int lock_rdev(struct md_rdev *rdev, dev_t dev, int shared) |
1da177e4 LT |
2534 | { |
2535 | int err = 0; | |
2536 | struct block_device *bdev; | |
1da177e4 | 2537 | |
d4d77629 | 2538 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, |
3cb03002 | 2539 | shared ? (struct md_rdev *)lock_rdev : rdev); |
1da177e4 | 2540 | if (IS_ERR(bdev)) { |
ea3edd4d CH |
2541 | pr_warn("md: could not open device unknown-block(%u,%u).\n", |
2542 | MAJOR(dev), MINOR(dev)); | |
1da177e4 LT |
2543 | return PTR_ERR(bdev); |
2544 | } | |
1da177e4 LT |
2545 | rdev->bdev = bdev; |
2546 | return err; | |
2547 | } | |
2548 | ||
3cb03002 | 2549 | static void unlock_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2550 | { |
2551 | struct block_device *bdev = rdev->bdev; | |
2552 | rdev->bdev = NULL; | |
e525fd89 | 2553 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
1da177e4 LT |
2554 | } |
2555 | ||
2556 | void md_autodetect_dev(dev_t dev); | |
2557 | ||
f72ffdd6 | 2558 | static void export_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2559 | { |
2560 | char b[BDEVNAME_SIZE]; | |
403df478 | 2561 | |
9d48739e | 2562 | pr_debug("md: export_rdev(%s)\n", bdevname(rdev->bdev,b)); |
545c8795 | 2563 | md_rdev_clear(rdev); |
1da177e4 | 2564 | #ifndef MODULE |
d0fae18f N |
2565 | if (test_bit(AutoDetected, &rdev->flags)) |
2566 | md_autodetect_dev(rdev->bdev->bd_dev); | |
1da177e4 LT |
2567 | #endif |
2568 | unlock_rdev(rdev); | |
86e6ffdd | 2569 | kobject_put(&rdev->kobj); |
1da177e4 LT |
2570 | } |
2571 | ||
fb56dfef | 2572 | void md_kick_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2573 | { |
2574 | unbind_rdev_from_array(rdev); | |
2575 | export_rdev(rdev); | |
2576 | } | |
fb56dfef | 2577 | EXPORT_SYMBOL_GPL(md_kick_rdev_from_array); |
1da177e4 | 2578 | |
fd01b88c | 2579 | static void export_array(struct mddev *mddev) |
1da177e4 | 2580 | { |
0638bb0e | 2581 | struct md_rdev *rdev; |
1da177e4 | 2582 | |
0638bb0e N |
2583 | while (!list_empty(&mddev->disks)) { |
2584 | rdev = list_first_entry(&mddev->disks, struct md_rdev, | |
2585 | same_set); | |
fb56dfef | 2586 | md_kick_rdev_from_array(rdev); |
1da177e4 | 2587 | } |
1da177e4 LT |
2588 | mddev->raid_disks = 0; |
2589 | mddev->major_version = 0; | |
2590 | } | |
2591 | ||
6497709b N |
2592 | static bool set_in_sync(struct mddev *mddev) |
2593 | { | |
efa4b77b | 2594 | lockdep_assert_held(&mddev->lock); |
4ad23a97 N |
2595 | if (!mddev->in_sync) { |
2596 | mddev->sync_checkers++; | |
2597 | spin_unlock(&mddev->lock); | |
2598 | percpu_ref_switch_to_atomic_sync(&mddev->writes_pending); | |
2599 | spin_lock(&mddev->lock); | |
2600 | if (!mddev->in_sync && | |
2601 | percpu_ref_is_zero(&mddev->writes_pending)) { | |
6497709b | 2602 | mddev->in_sync = 1; |
4ad23a97 N |
2603 | /* |
2604 | * Ensure ->in_sync is visible before we clear | |
2605 | * ->sync_checkers. | |
2606 | */ | |
55cc39f3 | 2607 | smp_mb(); |
6497709b N |
2608 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2609 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
2610 | } | |
4ad23a97 N |
2611 | if (--mddev->sync_checkers == 0) |
2612 | percpu_ref_switch_to_percpu(&mddev->writes_pending); | |
6497709b N |
2613 | } |
2614 | if (mddev->safemode == 1) | |
2615 | mddev->safemode = 0; | |
2616 | return mddev->in_sync; | |
2617 | } | |
2618 | ||
f72ffdd6 | 2619 | static void sync_sbs(struct mddev *mddev, int nospares) |
1da177e4 | 2620 | { |
42543769 N |
2621 | /* Update each superblock (in-memory image), but |
2622 | * if we are allowed to, skip spares which already | |
2623 | * have the right event counter, or have one earlier | |
2624 | * (which would mean they aren't being marked as dirty | |
2625 | * with the rest of the array) | |
2626 | */ | |
3cb03002 | 2627 | struct md_rdev *rdev; |
dafb20fa | 2628 | rdev_for_each(rdev, mddev) { |
42543769 N |
2629 | if (rdev->sb_events == mddev->events || |
2630 | (nospares && | |
2631 | rdev->raid_disk < 0 && | |
42543769 N |
2632 | rdev->sb_events+1 == mddev->events)) { |
2633 | /* Don't update this superblock */ | |
2634 | rdev->sb_loaded = 2; | |
2635 | } else { | |
076f968b | 2636 | sync_super(mddev, rdev); |
42543769 N |
2637 | rdev->sb_loaded = 1; |
2638 | } | |
1da177e4 LT |
2639 | } |
2640 | } | |
2641 | ||
2aa82191 GR |
2642 | static bool does_sb_need_changing(struct mddev *mddev) |
2643 | { | |
2644 | struct md_rdev *rdev; | |
2645 | struct mdp_superblock_1 *sb; | |
2646 | int role; | |
2647 | ||
2648 | /* Find a good rdev */ | |
2649 | rdev_for_each(rdev, mddev) | |
2650 | if ((rdev->raid_disk >= 0) && !test_bit(Faulty, &rdev->flags)) | |
2651 | break; | |
2652 | ||
2653 | /* No good device found. */ | |
2654 | if (!rdev) | |
2655 | return false; | |
2656 | ||
2657 | sb = page_address(rdev->sb_page); | |
2658 | /* Check if a device has become faulty or a spare become active */ | |
2659 | rdev_for_each(rdev, mddev) { | |
2660 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
2661 | /* Device activated? */ | |
2662 | if (role == 0xffff && rdev->raid_disk >=0 && | |
2663 | !test_bit(Faulty, &rdev->flags)) | |
2664 | return true; | |
2665 | /* Device turned faulty? */ | |
2666 | if (test_bit(Faulty, &rdev->flags) && (role < 0xfffd)) | |
2667 | return true; | |
2668 | } | |
2669 | ||
2670 | /* Check if any mddev parameters have changed */ | |
2671 | if ((mddev->dev_sectors != le64_to_cpu(sb->size)) || | |
2672 | (mddev->reshape_position != le64_to_cpu(sb->reshape_position)) || | |
13459213 | 2673 | (mddev->layout != le32_to_cpu(sb->layout)) || |
2aa82191 GR |
2674 | (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) || |
2675 | (mddev->chunk_sectors != le32_to_cpu(sb->chunksize))) | |
2676 | return true; | |
2677 | ||
2678 | return false; | |
2679 | } | |
2680 | ||
1aee41f6 | 2681 | void md_update_sb(struct mddev *mddev, int force_change) |
1da177e4 | 2682 | { |
3cb03002 | 2683 | struct md_rdev *rdev; |
06d91a5f | 2684 | int sync_req; |
42543769 | 2685 | int nospares = 0; |
2699b672 | 2686 | int any_badblocks_changed = 0; |
23b63f9f | 2687 | int ret = -1; |
1da177e4 | 2688 | |
d87f064f N |
2689 | if (mddev->ro) { |
2690 | if (force_change) | |
2953079c | 2691 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
d87f064f N |
2692 | return; |
2693 | } | |
2aa82191 | 2694 | |
2c97cf13 | 2695 | repeat: |
2aa82191 | 2696 | if (mddev_is_clustered(mddev)) { |
2953079c | 2697 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
2aa82191 | 2698 | force_change = 1; |
2953079c | 2699 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
85ad1d13 | 2700 | nospares = 1; |
23b63f9f | 2701 | ret = md_cluster_ops->metadata_update_start(mddev); |
2aa82191 GR |
2702 | /* Has someone else has updated the sb */ |
2703 | if (!does_sb_need_changing(mddev)) { | |
23b63f9f GJ |
2704 | if (ret == 0) |
2705 | md_cluster_ops->metadata_update_cancel(mddev); | |
2953079c SL |
2706 | bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2707 | BIT(MD_SB_CHANGE_DEVS) | | |
2708 | BIT(MD_SB_CHANGE_CLEAN)); | |
2aa82191 GR |
2709 | return; |
2710 | } | |
2711 | } | |
2c97cf13 | 2712 | |
db0505d3 N |
2713 | /* |
2714 | * First make sure individual recovery_offsets are correct | |
2715 | * curr_resync_completed can only be used during recovery. | |
2716 | * During reshape/resync it might use array-addresses rather | |
2717 | * that device addresses. | |
2718 | */ | |
dafb20fa | 2719 | rdev_for_each(rdev, mddev) { |
3a3a5ddb N |
2720 | if (rdev->raid_disk >= 0 && |
2721 | mddev->delta_disks >= 0 && | |
db0505d3 N |
2722 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
2723 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery) && | |
2724 | !test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
f2076e7d | 2725 | !test_bit(Journal, &rdev->flags) && |
3a3a5ddb N |
2726 | !test_bit(In_sync, &rdev->flags) && |
2727 | mddev->curr_resync_completed > rdev->recovery_offset) | |
2728 | rdev->recovery_offset = mddev->curr_resync_completed; | |
2729 | ||
f72ffdd6 | 2730 | } |
bd52b746 | 2731 | if (!mddev->persistent) { |
2953079c SL |
2732 | clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2733 | clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
de393cde | 2734 | if (!mddev->external) { |
2953079c | 2735 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
dafb20fa | 2736 | rdev_for_each(rdev, mddev) { |
de393cde | 2737 | if (rdev->badblocks.changed) { |
d0962936 | 2738 | rdev->badblocks.changed = 0; |
fc974ee2 | 2739 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2740 | md_error(mddev, rdev); |
2741 | } | |
2742 | clear_bit(Blocked, &rdev->flags); | |
2743 | clear_bit(BlockedBadBlocks, &rdev->flags); | |
2744 | wake_up(&rdev->blocked_wait); | |
2745 | } | |
2746 | } | |
3a3a5ddb N |
2747 | wake_up(&mddev->sb_wait); |
2748 | return; | |
2749 | } | |
2750 | ||
85572d7c | 2751 | spin_lock(&mddev->lock); |
84692195 | 2752 | |
9ebc6ef1 | 2753 | mddev->utime = ktime_get_real_seconds(); |
3a3a5ddb | 2754 | |
2953079c | 2755 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
850b2b42 | 2756 | force_change = 1; |
2953079c | 2757 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
850b2b42 N |
2758 | /* just a clean<-> dirty transition, possibly leave spares alone, |
2759 | * though if events isn't the right even/odd, we will have to do | |
2760 | * spares after all | |
2761 | */ | |
2762 | nospares = 1; | |
2763 | if (force_change) | |
2764 | nospares = 0; | |
2765 | if (mddev->degraded) | |
84692195 N |
2766 | /* If the array is degraded, then skipping spares is both |
2767 | * dangerous and fairly pointless. | |
2768 | * Dangerous because a device that was removed from the array | |
2769 | * might have a event_count that still looks up-to-date, | |
2770 | * so it can be re-added without a resync. | |
2771 | * Pointless because if there are any spares to skip, | |
2772 | * then a recovery will happen and soon that array won't | |
2773 | * be degraded any more and the spare can go back to sleep then. | |
2774 | */ | |
850b2b42 | 2775 | nospares = 0; |
84692195 | 2776 | |
06d91a5f | 2777 | sync_req = mddev->in_sync; |
42543769 N |
2778 | |
2779 | /* If this is just a dirty<->clean transition, and the array is clean | |
2780 | * and 'events' is odd, we can roll back to the previous clean state */ | |
850b2b42 | 2781 | if (nospares |
42543769 | 2782 | && (mddev->in_sync && mddev->recovery_cp == MaxSector) |
a8707c08 N |
2783 | && mddev->can_decrease_events |
2784 | && mddev->events != 1) { | |
42543769 | 2785 | mddev->events--; |
a8707c08 N |
2786 | mddev->can_decrease_events = 0; |
2787 | } else { | |
42543769 N |
2788 | /* otherwise we have to go forward and ... */ |
2789 | mddev->events ++; | |
a8707c08 | 2790 | mddev->can_decrease_events = nospares; |
42543769 | 2791 | } |
1da177e4 | 2792 | |
403df478 N |
2793 | /* |
2794 | * This 64-bit counter should never wrap. | |
2795 | * Either we are in around ~1 trillion A.C., assuming | |
2796 | * 1 reboot per second, or we have a bug... | |
2797 | */ | |
2798 | WARN_ON(mddev->events == 0); | |
2699b672 | 2799 | |
dafb20fa | 2800 | rdev_for_each(rdev, mddev) { |
2699b672 N |
2801 | if (rdev->badblocks.changed) |
2802 | any_badblocks_changed++; | |
de393cde N |
2803 | if (test_bit(Faulty, &rdev->flags)) |
2804 | set_bit(FaultRecorded, &rdev->flags); | |
2805 | } | |
2699b672 | 2806 | |
e691063a | 2807 | sync_sbs(mddev, nospares); |
85572d7c | 2808 | spin_unlock(&mddev->lock); |
1da177e4 | 2809 | |
36a4e1fe N |
2810 | pr_debug("md: updating %s RAID superblock on device (in sync %d)\n", |
2811 | mdname(mddev), mddev->in_sync); | |
1da177e4 | 2812 | |
504634f6 SL |
2813 | if (mddev->queue) |
2814 | blk_add_trace_msg(mddev->queue, "md md_update_sb"); | |
46533ff7 | 2815 | rewrite: |
e64e4018 | 2816 | md_bitmap_update_sb(mddev->bitmap); |
dafb20fa | 2817 | rdev_for_each(rdev, mddev) { |
1da177e4 | 2818 | char b[BDEVNAME_SIZE]; |
36a4e1fe | 2819 | |
42543769 N |
2820 | if (rdev->sb_loaded != 1) |
2821 | continue; /* no noise on spare devices */ | |
1da177e4 | 2822 | |
f466722c | 2823 | if (!test_bit(Faulty, &rdev->flags)) { |
7bfa19f2 | 2824 | md_super_write(mddev,rdev, |
0f420358 | 2825 | rdev->sb_start, rdev->sb_size, |
7bfa19f2 | 2826 | rdev->sb_page); |
36a4e1fe N |
2827 | pr_debug("md: (write) %s's sb offset: %llu\n", |
2828 | bdevname(rdev->bdev, b), | |
2829 | (unsigned long long)rdev->sb_start); | |
42543769 | 2830 | rdev->sb_events = mddev->events; |
2699b672 N |
2831 | if (rdev->badblocks.size) { |
2832 | md_super_write(mddev, rdev, | |
2833 | rdev->badblocks.sector, | |
2834 | rdev->badblocks.size << 9, | |
2835 | rdev->bb_page); | |
2836 | rdev->badblocks.size = 0; | |
2837 | } | |
7bfa19f2 | 2838 | |
f466722c | 2839 | } else |
36a4e1fe N |
2840 | pr_debug("md: %s (skipping faulty)\n", |
2841 | bdevname(rdev->bdev, b)); | |
d70ed2e4 | 2842 | |
7bfa19f2 | 2843 | if (mddev->level == LEVEL_MULTIPATH) |
1da177e4 LT |
2844 | /* only need to write one superblock... */ |
2845 | break; | |
2846 | } | |
46533ff7 N |
2847 | if (md_super_wait(mddev) < 0) |
2848 | goto rewrite; | |
2953079c | 2849 | /* if there was a failure, MD_SB_CHANGE_DEVS was set, and we re-write super */ |
7bfa19f2 | 2850 | |
2c97cf13 GJ |
2851 | if (mddev_is_clustered(mddev) && ret == 0) |
2852 | md_cluster_ops->metadata_update_finish(mddev); | |
2853 | ||
850b2b42 | 2854 | if (mddev->in_sync != sync_req || |
2953079c SL |
2855 | !bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2856 | BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_CLEAN))) | |
06d91a5f | 2857 | /* have to write it out again */ |
06d91a5f | 2858 | goto repeat; |
3d310eb7 | 2859 | wake_up(&mddev->sb_wait); |
acb180b0 | 2860 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
e1a86dbb | 2861 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
06d91a5f | 2862 | |
dafb20fa | 2863 | rdev_for_each(rdev, mddev) { |
de393cde N |
2864 | if (test_and_clear_bit(FaultRecorded, &rdev->flags)) |
2865 | clear_bit(Blocked, &rdev->flags); | |
2866 | ||
2867 | if (any_badblocks_changed) | |
fc974ee2 | 2868 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2869 | clear_bit(BlockedBadBlocks, &rdev->flags); |
2870 | wake_up(&rdev->blocked_wait); | |
2871 | } | |
1da177e4 | 2872 | } |
1aee41f6 | 2873 | EXPORT_SYMBOL(md_update_sb); |
1da177e4 | 2874 | |
a6da4ef8 GR |
2875 | static int add_bound_rdev(struct md_rdev *rdev) |
2876 | { | |
2877 | struct mddev *mddev = rdev->mddev; | |
2878 | int err = 0; | |
87d4d916 | 2879 | bool add_journal = test_bit(Journal, &rdev->flags); |
a6da4ef8 | 2880 | |
87d4d916 | 2881 | if (!mddev->pers->hot_remove_disk || add_journal) { |
a6da4ef8 GR |
2882 | /* If there is hot_add_disk but no hot_remove_disk |
2883 | * then added disks for geometry changes, | |
2884 | * and should be added immediately. | |
2885 | */ | |
2886 | super_types[mddev->major_version]. | |
2887 | validate_super(mddev, rdev); | |
87d4d916 SL |
2888 | if (add_journal) |
2889 | mddev_suspend(mddev); | |
a6da4ef8 | 2890 | err = mddev->pers->hot_add_disk(mddev, rdev); |
87d4d916 SL |
2891 | if (add_journal) |
2892 | mddev_resume(mddev); | |
a6da4ef8 | 2893 | if (err) { |
db767672 | 2894 | md_kick_rdev_from_array(rdev); |
a6da4ef8 GR |
2895 | return err; |
2896 | } | |
2897 | } | |
2898 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2899 | ||
2953079c | 2900 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a6da4ef8 GR |
2901 | if (mddev->degraded) |
2902 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
2903 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
2904 | md_new_event(mddev); | |
2905 | md_wakeup_thread(mddev->thread); | |
2906 | return 0; | |
2907 | } | |
1da177e4 | 2908 | |
7f6ce769 | 2909 | /* words written to sysfs files may, or may not, be \n terminated. |
bce74dac N |
2910 | * We want to accept with case. For this we use cmd_match. |
2911 | */ | |
2912 | static int cmd_match(const char *cmd, const char *str) | |
2913 | { | |
2914 | /* See if cmd, written into a sysfs file, matches | |
2915 | * str. They must either be the same, or cmd can | |
2916 | * have a trailing newline | |
2917 | */ | |
2918 | while (*cmd && *str && *cmd == *str) { | |
2919 | cmd++; | |
2920 | str++; | |
2921 | } | |
2922 | if (*cmd == '\n') | |
2923 | cmd++; | |
2924 | if (*str || *cmd) | |
2925 | return 0; | |
2926 | return 1; | |
2927 | } | |
2928 | ||
86e6ffdd N |
2929 | struct rdev_sysfs_entry { |
2930 | struct attribute attr; | |
3cb03002 N |
2931 | ssize_t (*show)(struct md_rdev *, char *); |
2932 | ssize_t (*store)(struct md_rdev *, const char *, size_t); | |
86e6ffdd N |
2933 | }; |
2934 | ||
2935 | static ssize_t | |
3cb03002 | 2936 | state_show(struct md_rdev *rdev, char *page) |
86e6ffdd | 2937 | { |
35b785f7 | 2938 | char *sep = ","; |
20a49ff6 | 2939 | size_t len = 0; |
6aa7de05 | 2940 | unsigned long flags = READ_ONCE(rdev->flags); |
86e6ffdd | 2941 | |
758bfc8a | 2942 | if (test_bit(Faulty, &flags) || |
dcbcb486 TM |
2943 | (!test_bit(ExternalBbl, &flags) && |
2944 | rdev->badblocks.unacked_exist)) | |
35b785f7 TM |
2945 | len += sprintf(page+len, "faulty%s", sep); |
2946 | if (test_bit(In_sync, &flags)) | |
2947 | len += sprintf(page+len, "in_sync%s", sep); | |
2948 | if (test_bit(Journal, &flags)) | |
2949 | len += sprintf(page+len, "journal%s", sep); | |
2950 | if (test_bit(WriteMostly, &flags)) | |
2951 | len += sprintf(page+len, "write_mostly%s", sep); | |
758bfc8a | 2952 | if (test_bit(Blocked, &flags) || |
52c64152 | 2953 | (rdev->badblocks.unacked_exist |
35b785f7 TM |
2954 | && !test_bit(Faulty, &flags))) |
2955 | len += sprintf(page+len, "blocked%s", sep); | |
758bfc8a | 2956 | if (!test_bit(Faulty, &flags) && |
f2076e7d | 2957 | !test_bit(Journal, &flags) && |
35b785f7 TM |
2958 | !test_bit(In_sync, &flags)) |
2959 | len += sprintf(page+len, "spare%s", sep); | |
2960 | if (test_bit(WriteErrorSeen, &flags)) | |
2961 | len += sprintf(page+len, "write_error%s", sep); | |
2962 | if (test_bit(WantReplacement, &flags)) | |
2963 | len += sprintf(page+len, "want_replacement%s", sep); | |
2964 | if (test_bit(Replacement, &flags)) | |
2965 | len += sprintf(page+len, "replacement%s", sep); | |
2966 | if (test_bit(ExternalBbl, &flags)) | |
2967 | len += sprintf(page+len, "external_bbl%s", sep); | |
688834e6 N |
2968 | if (test_bit(FailFast, &flags)) |
2969 | len += sprintf(page+len, "failfast%s", sep); | |
35b785f7 TM |
2970 | |
2971 | if (len) | |
2972 | len -= strlen(sep); | |
2d78f8c4 | 2973 | |
86e6ffdd N |
2974 | return len+sprintf(page+len, "\n"); |
2975 | } | |
2976 | ||
45dc2de1 | 2977 | static ssize_t |
3cb03002 | 2978 | state_store(struct md_rdev *rdev, const char *buf, size_t len) |
45dc2de1 N |
2979 | { |
2980 | /* can write | |
de393cde | 2981 | * faulty - simulates an error |
45dc2de1 | 2982 | * remove - disconnects the device |
f655675b N |
2983 | * writemostly - sets write_mostly |
2984 | * -writemostly - clears write_mostly | |
de393cde N |
2985 | * blocked - sets the Blocked flags |
2986 | * -blocked - clears the Blocked and possibly simulates an error | |
6d56e278 | 2987 | * insync - sets Insync providing device isn't active |
f466722c N |
2988 | * -insync - clear Insync for a device with a slot assigned, |
2989 | * so that it gets rebuilt based on bitmap | |
d7a9d443 N |
2990 | * write_error - sets WriteErrorSeen |
2991 | * -write_error - clears WriteErrorSeen | |
688834e6 | 2992 | * {,-}failfast - set/clear FailFast |
45dc2de1 N |
2993 | */ |
2994 | int err = -EINVAL; | |
2995 | if (cmd_match(buf, "faulty") && rdev->mddev->pers) { | |
2996 | md_error(rdev->mddev, rdev); | |
5ef56c8f N |
2997 | if (test_bit(Faulty, &rdev->flags)) |
2998 | err = 0; | |
2999 | else | |
3000 | err = -EBUSY; | |
45dc2de1 | 3001 | } else if (cmd_match(buf, "remove")) { |
5d881783 SL |
3002 | if (rdev->mddev->pers) { |
3003 | clear_bit(Blocked, &rdev->flags); | |
3004 | remove_and_add_spares(rdev->mddev, rdev); | |
3005 | } | |
45dc2de1 N |
3006 | if (rdev->raid_disk >= 0) |
3007 | err = -EBUSY; | |
3008 | else { | |
fd01b88c | 3009 | struct mddev *mddev = rdev->mddev; |
45dc2de1 | 3010 | err = 0; |
a9720903 GJ |
3011 | if (mddev_is_clustered(mddev)) |
3012 | err = md_cluster_ops->remove_disk(mddev, rdev); | |
3013 | ||
3014 | if (err == 0) { | |
3015 | md_kick_rdev_from_array(rdev); | |
060b0689 | 3016 | if (mddev->pers) { |
2953079c | 3017 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
3018 | md_wakeup_thread(mddev->thread); |
3019 | } | |
a9720903 GJ |
3020 | md_new_event(mddev); |
3021 | } | |
45dc2de1 | 3022 | } |
f655675b N |
3023 | } else if (cmd_match(buf, "writemostly")) { |
3024 | set_bit(WriteMostly, &rdev->flags); | |
404659cf | 3025 | mddev_create_serial_pool(rdev->mddev, rdev, false); |
f655675b N |
3026 | err = 0; |
3027 | } else if (cmd_match(buf, "-writemostly")) { | |
11d3a9f6 | 3028 | mddev_destroy_serial_pool(rdev->mddev, rdev, false); |
f655675b | 3029 | clear_bit(WriteMostly, &rdev->flags); |
6bfe0b49 DW |
3030 | err = 0; |
3031 | } else if (cmd_match(buf, "blocked")) { | |
3032 | set_bit(Blocked, &rdev->flags); | |
3033 | err = 0; | |
3034 | } else if (cmd_match(buf, "-blocked")) { | |
de393cde | 3035 | if (!test_bit(Faulty, &rdev->flags) && |
dcbcb486 | 3036 | !test_bit(ExternalBbl, &rdev->flags) && |
7da64a0a | 3037 | rdev->badblocks.unacked_exist) { |
de393cde N |
3038 | /* metadata handler doesn't understand badblocks, |
3039 | * so we need to fail the device | |
3040 | */ | |
3041 | md_error(rdev->mddev, rdev); | |
3042 | } | |
6bfe0b49 | 3043 | clear_bit(Blocked, &rdev->flags); |
de393cde | 3044 | clear_bit(BlockedBadBlocks, &rdev->flags); |
6bfe0b49 DW |
3045 | wake_up(&rdev->blocked_wait); |
3046 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
3047 | md_wakeup_thread(rdev->mddev->thread); | |
3048 | ||
6d56e278 N |
3049 | err = 0; |
3050 | } else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) { | |
3051 | set_bit(In_sync, &rdev->flags); | |
f655675b | 3052 | err = 0; |
688834e6 N |
3053 | } else if (cmd_match(buf, "failfast")) { |
3054 | set_bit(FailFast, &rdev->flags); | |
3055 | err = 0; | |
3056 | } else if (cmd_match(buf, "-failfast")) { | |
3057 | clear_bit(FailFast, &rdev->flags); | |
3058 | err = 0; | |
f2076e7d SL |
3059 | } else if (cmd_match(buf, "-insync") && rdev->raid_disk >= 0 && |
3060 | !test_bit(Journal, &rdev->flags)) { | |
e1960f8c N |
3061 | if (rdev->mddev->pers == NULL) { |
3062 | clear_bit(In_sync, &rdev->flags); | |
3063 | rdev->saved_raid_disk = rdev->raid_disk; | |
3064 | rdev->raid_disk = -1; | |
3065 | err = 0; | |
3066 | } | |
d7a9d443 N |
3067 | } else if (cmd_match(buf, "write_error")) { |
3068 | set_bit(WriteErrorSeen, &rdev->flags); | |
3069 | err = 0; | |
3070 | } else if (cmd_match(buf, "-write_error")) { | |
3071 | clear_bit(WriteErrorSeen, &rdev->flags); | |
3072 | err = 0; | |
2d78f8c4 N |
3073 | } else if (cmd_match(buf, "want_replacement")) { |
3074 | /* Any non-spare device that is not a replacement can | |
3075 | * become want_replacement at any time, but we then need to | |
3076 | * check if recovery is needed. | |
3077 | */ | |
3078 | if (rdev->raid_disk >= 0 && | |
f2076e7d | 3079 | !test_bit(Journal, &rdev->flags) && |
2d78f8c4 N |
3080 | !test_bit(Replacement, &rdev->flags)) |
3081 | set_bit(WantReplacement, &rdev->flags); | |
3082 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
3083 | md_wakeup_thread(rdev->mddev->thread); | |
3084 | err = 0; | |
3085 | } else if (cmd_match(buf, "-want_replacement")) { | |
3086 | /* Clearing 'want_replacement' is always allowed. | |
3087 | * Once replacements starts it is too late though. | |
3088 | */ | |
3089 | err = 0; | |
3090 | clear_bit(WantReplacement, &rdev->flags); | |
3091 | } else if (cmd_match(buf, "replacement")) { | |
3092 | /* Can only set a device as a replacement when array has not | |
3093 | * yet been started. Once running, replacement is automatic | |
3094 | * from spares, or by assigning 'slot'. | |
3095 | */ | |
3096 | if (rdev->mddev->pers) | |
3097 | err = -EBUSY; | |
3098 | else { | |
3099 | set_bit(Replacement, &rdev->flags); | |
3100 | err = 0; | |
3101 | } | |
3102 | } else if (cmd_match(buf, "-replacement")) { | |
3103 | /* Similarly, can only clear Replacement before start */ | |
3104 | if (rdev->mddev->pers) | |
3105 | err = -EBUSY; | |
3106 | else { | |
3107 | clear_bit(Replacement, &rdev->flags); | |
3108 | err = 0; | |
3109 | } | |
a6da4ef8 | 3110 | } else if (cmd_match(buf, "re-add")) { |
ee37e621 YY |
3111 | if (!rdev->mddev->pers) |
3112 | err = -EINVAL; | |
3113 | else if (test_bit(Faulty, &rdev->flags) && (rdev->raid_disk == -1) && | |
3114 | rdev->saved_raid_disk >= 0) { | |
97f6cd39 GR |
3115 | /* clear_bit is performed _after_ all the devices |
3116 | * have their local Faulty bit cleared. If any writes | |
3117 | * happen in the meantime in the local node, they | |
3118 | * will land in the local bitmap, which will be synced | |
3119 | * by this node eventually | |
3120 | */ | |
3121 | if (!mddev_is_clustered(rdev->mddev) || | |
3122 | (err = md_cluster_ops->gather_bitmaps(rdev)) == 0) { | |
3123 | clear_bit(Faulty, &rdev->flags); | |
3124 | err = add_bound_rdev(rdev); | |
3125 | } | |
a6da4ef8 GR |
3126 | } else |
3127 | err = -EBUSY; | |
35b785f7 TM |
3128 | } else if (cmd_match(buf, "external_bbl") && (rdev->mddev->external)) { |
3129 | set_bit(ExternalBbl, &rdev->flags); | |
3130 | rdev->badblocks.shift = 0; | |
3131 | err = 0; | |
3132 | } else if (cmd_match(buf, "-external_bbl") && (rdev->mddev->external)) { | |
3133 | clear_bit(ExternalBbl, &rdev->flags); | |
3134 | err = 0; | |
45dc2de1 | 3135 | } |
00bcb4ac N |
3136 | if (!err) |
3137 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
45dc2de1 N |
3138 | return err ? err : len; |
3139 | } | |
80ca3a44 | 3140 | static struct rdev_sysfs_entry rdev_state = |
750f199e | 3141 | __ATTR_PREALLOC(state, S_IRUGO|S_IWUSR, state_show, state_store); |
86e6ffdd | 3142 | |
4dbcdc75 | 3143 | static ssize_t |
3cb03002 | 3144 | errors_show(struct md_rdev *rdev, char *page) |
4dbcdc75 N |
3145 | { |
3146 | return sprintf(page, "%d\n", atomic_read(&rdev->corrected_errors)); | |
3147 | } | |
3148 | ||
3149 | static ssize_t | |
3cb03002 | 3150 | errors_store(struct md_rdev *rdev, const char *buf, size_t len) |
4dbcdc75 | 3151 | { |
4c9309c0 AD |
3152 | unsigned int n; |
3153 | int rv; | |
3154 | ||
3155 | rv = kstrtouint(buf, 10, &n); | |
3156 | if (rv < 0) | |
3157 | return rv; | |
3158 | atomic_set(&rdev->corrected_errors, n); | |
3159 | return len; | |
4dbcdc75 N |
3160 | } |
3161 | static struct rdev_sysfs_entry rdev_errors = | |
80ca3a44 | 3162 | __ATTR(errors, S_IRUGO|S_IWUSR, errors_show, errors_store); |
4dbcdc75 | 3163 | |
014236d2 | 3164 | static ssize_t |
3cb03002 | 3165 | slot_show(struct md_rdev *rdev, char *page) |
014236d2 | 3166 | { |
f2076e7d SL |
3167 | if (test_bit(Journal, &rdev->flags)) |
3168 | return sprintf(page, "journal\n"); | |
3169 | else if (rdev->raid_disk < 0) | |
014236d2 N |
3170 | return sprintf(page, "none\n"); |
3171 | else | |
3172 | return sprintf(page, "%d\n", rdev->raid_disk); | |
3173 | } | |
3174 | ||
3175 | static ssize_t | |
3cb03002 | 3176 | slot_store(struct md_rdev *rdev, const char *buf, size_t len) |
014236d2 | 3177 | { |
4c9309c0 | 3178 | int slot; |
c303da6d | 3179 | int err; |
4c9309c0 | 3180 | |
f2076e7d SL |
3181 | if (test_bit(Journal, &rdev->flags)) |
3182 | return -EBUSY; | |
014236d2 N |
3183 | if (strncmp(buf, "none", 4)==0) |
3184 | slot = -1; | |
4c9309c0 AD |
3185 | else { |
3186 | err = kstrtouint(buf, 10, (unsigned int *)&slot); | |
3187 | if (err < 0) | |
3188 | return err; | |
3189 | } | |
6c2fce2e | 3190 | if (rdev->mddev->pers && slot == -1) { |
c303da6d N |
3191 | /* Setting 'slot' on an active array requires also |
3192 | * updating the 'rd%d' link, and communicating | |
3193 | * with the personality with ->hot_*_disk. | |
3194 | * For now we only support removing | |
3195 | * failed/spare devices. This normally happens automatically, | |
3196 | * but not when the metadata is externally managed. | |
3197 | */ | |
c303da6d N |
3198 | if (rdev->raid_disk == -1) |
3199 | return -EEXIST; | |
3200 | /* personality does all needed checks */ | |
01393f3d | 3201 | if (rdev->mddev->pers->hot_remove_disk == NULL) |
c303da6d | 3202 | return -EINVAL; |
746d3207 N |
3203 | clear_bit(Blocked, &rdev->flags); |
3204 | remove_and_add_spares(rdev->mddev, rdev); | |
3205 | if (rdev->raid_disk >= 0) | |
3206 | return -EBUSY; | |
c303da6d N |
3207 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); |
3208 | md_wakeup_thread(rdev->mddev->thread); | |
6c2fce2e | 3209 | } else if (rdev->mddev->pers) { |
6c2fce2e | 3210 | /* Activating a spare .. or possibly reactivating |
6d56e278 | 3211 | * if we ever get bitmaps working here. |
6c2fce2e | 3212 | */ |
cb01c549 | 3213 | int err; |
6c2fce2e NB |
3214 | |
3215 | if (rdev->raid_disk != -1) | |
3216 | return -EBUSY; | |
3217 | ||
c6751b2b N |
3218 | if (test_bit(MD_RECOVERY_RUNNING, &rdev->mddev->recovery)) |
3219 | return -EBUSY; | |
3220 | ||
6c2fce2e NB |
3221 | if (rdev->mddev->pers->hot_add_disk == NULL) |
3222 | return -EINVAL; | |
3223 | ||
ba1b41b6 N |
3224 | if (slot >= rdev->mddev->raid_disks && |
3225 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
3226 | return -ENOSPC; | |
3227 | ||
6c2fce2e NB |
3228 | rdev->raid_disk = slot; |
3229 | if (test_bit(In_sync, &rdev->flags)) | |
3230 | rdev->saved_raid_disk = slot; | |
3231 | else | |
3232 | rdev->saved_raid_disk = -1; | |
d30519fc | 3233 | clear_bit(In_sync, &rdev->flags); |
8313b8e5 | 3234 | clear_bit(Bitmap_sync, &rdev->flags); |
3f79cc22 | 3235 | err = rdev->mddev->pers->hot_add_disk(rdev->mddev, rdev); |
cb01c549 GR |
3236 | if (err) { |
3237 | rdev->raid_disk = -1; | |
3238 | return err; | |
3239 | } else | |
3240 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
5e3b8a8d DLM |
3241 | /* failure here is OK */; |
3242 | sysfs_link_rdev(rdev->mddev, rdev); | |
6c2fce2e | 3243 | /* don't wakeup anyone, leave that to userspace. */ |
c303da6d | 3244 | } else { |
ba1b41b6 N |
3245 | if (slot >= rdev->mddev->raid_disks && |
3246 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
c303da6d N |
3247 | return -ENOSPC; |
3248 | rdev->raid_disk = slot; | |
3249 | /* assume it is working */ | |
c5d79adb N |
3250 | clear_bit(Faulty, &rdev->flags); |
3251 | clear_bit(WriteMostly, &rdev->flags); | |
c303da6d | 3252 | set_bit(In_sync, &rdev->flags); |
00bcb4ac | 3253 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
c303da6d | 3254 | } |
014236d2 N |
3255 | return len; |
3256 | } | |
3257 | ||
014236d2 | 3258 | static struct rdev_sysfs_entry rdev_slot = |
80ca3a44 | 3259 | __ATTR(slot, S_IRUGO|S_IWUSR, slot_show, slot_store); |
014236d2 | 3260 | |
93c8cad0 | 3261 | static ssize_t |
3cb03002 | 3262 | offset_show(struct md_rdev *rdev, char *page) |
93c8cad0 | 3263 | { |
6961ece4 | 3264 | return sprintf(page, "%llu\n", (unsigned long long)rdev->data_offset); |
93c8cad0 N |
3265 | } |
3266 | ||
3267 | static ssize_t | |
3cb03002 | 3268 | offset_store(struct md_rdev *rdev, const char *buf, size_t len) |
93c8cad0 | 3269 | { |
c6563a8c | 3270 | unsigned long long offset; |
b29bebd6 | 3271 | if (kstrtoull(buf, 10, &offset) < 0) |
93c8cad0 | 3272 | return -EINVAL; |
8ed0a521 | 3273 | if (rdev->mddev->pers && rdev->raid_disk >= 0) |
93c8cad0 | 3274 | return -EBUSY; |
dd8ac336 | 3275 | if (rdev->sectors && rdev->mddev->external) |
c5d79adb N |
3276 | /* Must set offset before size, so overlap checks |
3277 | * can be sane */ | |
3278 | return -EBUSY; | |
93c8cad0 | 3279 | rdev->data_offset = offset; |
25f7fd47 | 3280 | rdev->new_data_offset = offset; |
93c8cad0 N |
3281 | return len; |
3282 | } | |
3283 | ||
3284 | static struct rdev_sysfs_entry rdev_offset = | |
80ca3a44 | 3285 | __ATTR(offset, S_IRUGO|S_IWUSR, offset_show, offset_store); |
93c8cad0 | 3286 | |
c6563a8c N |
3287 | static ssize_t new_offset_show(struct md_rdev *rdev, char *page) |
3288 | { | |
3289 | return sprintf(page, "%llu\n", | |
3290 | (unsigned long long)rdev->new_data_offset); | |
3291 | } | |
3292 | ||
3293 | static ssize_t new_offset_store(struct md_rdev *rdev, | |
3294 | const char *buf, size_t len) | |
3295 | { | |
3296 | unsigned long long new_offset; | |
3297 | struct mddev *mddev = rdev->mddev; | |
3298 | ||
b29bebd6 | 3299 | if (kstrtoull(buf, 10, &new_offset) < 0) |
c6563a8c N |
3300 | return -EINVAL; |
3301 | ||
f851b60d N |
3302 | if (mddev->sync_thread || |
3303 | test_bit(MD_RECOVERY_RUNNING,&mddev->recovery)) | |
c6563a8c N |
3304 | return -EBUSY; |
3305 | if (new_offset == rdev->data_offset) | |
3306 | /* reset is always permitted */ | |
3307 | ; | |
3308 | else if (new_offset > rdev->data_offset) { | |
3309 | /* must not push array size beyond rdev_sectors */ | |
3310 | if (new_offset - rdev->data_offset | |
3311 | + mddev->dev_sectors > rdev->sectors) | |
3312 | return -E2BIG; | |
3313 | } | |
3314 | /* Metadata worries about other space details. */ | |
3315 | ||
3316 | /* decreasing the offset is inconsistent with a backwards | |
3317 | * reshape. | |
3318 | */ | |
3319 | if (new_offset < rdev->data_offset && | |
3320 | mddev->reshape_backwards) | |
3321 | return -EINVAL; | |
3322 | /* Increasing offset is inconsistent with forwards | |
3323 | * reshape. reshape_direction should be set to | |
3324 | * 'backwards' first. | |
3325 | */ | |
3326 | if (new_offset > rdev->data_offset && | |
3327 | !mddev->reshape_backwards) | |
3328 | return -EINVAL; | |
3329 | ||
3330 | if (mddev->pers && mddev->persistent && | |
3331 | !super_types[mddev->major_version] | |
3332 | .allow_new_offset(rdev, new_offset)) | |
3333 | return -E2BIG; | |
3334 | rdev->new_data_offset = new_offset; | |
3335 | if (new_offset > rdev->data_offset) | |
3336 | mddev->reshape_backwards = 1; | |
3337 | else if (new_offset < rdev->data_offset) | |
3338 | mddev->reshape_backwards = 0; | |
3339 | ||
3340 | return len; | |
3341 | } | |
3342 | static struct rdev_sysfs_entry rdev_new_offset = | |
3343 | __ATTR(new_offset, S_IRUGO|S_IWUSR, new_offset_show, new_offset_store); | |
3344 | ||
83303b61 | 3345 | static ssize_t |
3cb03002 | 3346 | rdev_size_show(struct md_rdev *rdev, char *page) |
83303b61 | 3347 | { |
dd8ac336 | 3348 | return sprintf(page, "%llu\n", (unsigned long long)rdev->sectors / 2); |
83303b61 N |
3349 | } |
3350 | ||
c5d79adb N |
3351 | static int overlaps(sector_t s1, sector_t l1, sector_t s2, sector_t l2) |
3352 | { | |
3353 | /* check if two start/length pairs overlap */ | |
3354 | if (s1+l1 <= s2) | |
3355 | return 0; | |
3356 | if (s2+l2 <= s1) | |
3357 | return 0; | |
3358 | return 1; | |
3359 | } | |
3360 | ||
b522adcd DW |
3361 | static int strict_blocks_to_sectors(const char *buf, sector_t *sectors) |
3362 | { | |
3363 | unsigned long long blocks; | |
3364 | sector_t new; | |
3365 | ||
b29bebd6 | 3366 | if (kstrtoull(buf, 10, &blocks) < 0) |
b522adcd DW |
3367 | return -EINVAL; |
3368 | ||
3369 | if (blocks & 1ULL << (8 * sizeof(blocks) - 1)) | |
3370 | return -EINVAL; /* sector conversion overflow */ | |
3371 | ||
3372 | new = blocks * 2; | |
3373 | if (new != blocks * 2) | |
3374 | return -EINVAL; /* unsigned long long to sector_t overflow */ | |
3375 | ||
3376 | *sectors = new; | |
3377 | return 0; | |
3378 | } | |
3379 | ||
83303b61 | 3380 | static ssize_t |
3cb03002 | 3381 | rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len) |
83303b61 | 3382 | { |
fd01b88c | 3383 | struct mddev *my_mddev = rdev->mddev; |
dd8ac336 | 3384 | sector_t oldsectors = rdev->sectors; |
b522adcd | 3385 | sector_t sectors; |
27c529bb | 3386 | |
f2076e7d SL |
3387 | if (test_bit(Journal, &rdev->flags)) |
3388 | return -EBUSY; | |
b522adcd | 3389 | if (strict_blocks_to_sectors(buf, §ors) < 0) |
d7027458 | 3390 | return -EINVAL; |
c6563a8c N |
3391 | if (rdev->data_offset != rdev->new_data_offset) |
3392 | return -EINVAL; /* too confusing */ | |
0cd17fec | 3393 | if (my_mddev->pers && rdev->raid_disk >= 0) { |
d7027458 | 3394 | if (my_mddev->persistent) { |
dd8ac336 AN |
3395 | sectors = super_types[my_mddev->major_version]. |
3396 | rdev_size_change(rdev, sectors); | |
3397 | if (!sectors) | |
0cd17fec | 3398 | return -EBUSY; |
dd8ac336 | 3399 | } else if (!sectors) |
77304d2a | 3400 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9) - |
dd8ac336 | 3401 | rdev->data_offset; |
a6468539 N |
3402 | if (!my_mddev->pers->resize) |
3403 | /* Cannot change size for RAID0 or Linear etc */ | |
3404 | return -EINVAL; | |
0cd17fec | 3405 | } |
dd8ac336 | 3406 | if (sectors < my_mddev->dev_sectors) |
7d3c6f87 | 3407 | return -EINVAL; /* component must fit device */ |
0cd17fec | 3408 | |
dd8ac336 AN |
3409 | rdev->sectors = sectors; |
3410 | if (sectors > oldsectors && my_mddev->external) { | |
8b1afc3d N |
3411 | /* Need to check that all other rdevs with the same |
3412 | * ->bdev do not overlap. 'rcu' is sufficient to walk | |
3413 | * the rdev lists safely. | |
3414 | * This check does not provide a hard guarantee, it | |
3415 | * just helps avoid dangerous mistakes. | |
c5d79adb | 3416 | */ |
fd01b88c | 3417 | struct mddev *mddev; |
c5d79adb | 3418 | int overlap = 0; |
159ec1fc | 3419 | struct list_head *tmp; |
c5d79adb | 3420 | |
8b1afc3d | 3421 | rcu_read_lock(); |
29ac4aa3 | 3422 | for_each_mddev(mddev, tmp) { |
3cb03002 | 3423 | struct md_rdev *rdev2; |
c5d79adb | 3424 | |
dafb20fa | 3425 | rdev_for_each(rdev2, mddev) |
f21e9ff7 N |
3426 | if (rdev->bdev == rdev2->bdev && |
3427 | rdev != rdev2 && | |
3428 | overlaps(rdev->data_offset, rdev->sectors, | |
3429 | rdev2->data_offset, | |
3430 | rdev2->sectors)) { | |
c5d79adb N |
3431 | overlap = 1; |
3432 | break; | |
3433 | } | |
c5d79adb N |
3434 | if (overlap) { |
3435 | mddev_put(mddev); | |
3436 | break; | |
3437 | } | |
3438 | } | |
8b1afc3d | 3439 | rcu_read_unlock(); |
c5d79adb N |
3440 | if (overlap) { |
3441 | /* Someone else could have slipped in a size | |
3442 | * change here, but doing so is just silly. | |
dd8ac336 | 3443 | * We put oldsectors back because we *know* it is |
c5d79adb N |
3444 | * safe, and trust userspace not to race with |
3445 | * itself | |
3446 | */ | |
dd8ac336 | 3447 | rdev->sectors = oldsectors; |
c5d79adb N |
3448 | return -EBUSY; |
3449 | } | |
3450 | } | |
83303b61 N |
3451 | return len; |
3452 | } | |
3453 | ||
3454 | static struct rdev_sysfs_entry rdev_size = | |
80ca3a44 | 3455 | __ATTR(size, S_IRUGO|S_IWUSR, rdev_size_show, rdev_size_store); |
83303b61 | 3456 | |
3cb03002 | 3457 | static ssize_t recovery_start_show(struct md_rdev *rdev, char *page) |
06e3c817 DW |
3458 | { |
3459 | unsigned long long recovery_start = rdev->recovery_offset; | |
3460 | ||
3461 | if (test_bit(In_sync, &rdev->flags) || | |
3462 | recovery_start == MaxSector) | |
3463 | return sprintf(page, "none\n"); | |
3464 | ||
3465 | return sprintf(page, "%llu\n", recovery_start); | |
3466 | } | |
3467 | ||
3cb03002 | 3468 | static ssize_t recovery_start_store(struct md_rdev *rdev, const char *buf, size_t len) |
06e3c817 DW |
3469 | { |
3470 | unsigned long long recovery_start; | |
3471 | ||
3472 | if (cmd_match(buf, "none")) | |
3473 | recovery_start = MaxSector; | |
b29bebd6 | 3474 | else if (kstrtoull(buf, 10, &recovery_start)) |
06e3c817 DW |
3475 | return -EINVAL; |
3476 | ||
3477 | if (rdev->mddev->pers && | |
3478 | rdev->raid_disk >= 0) | |
3479 | return -EBUSY; | |
3480 | ||
3481 | rdev->recovery_offset = recovery_start; | |
3482 | if (recovery_start == MaxSector) | |
3483 | set_bit(In_sync, &rdev->flags); | |
3484 | else | |
3485 | clear_bit(In_sync, &rdev->flags); | |
3486 | return len; | |
3487 | } | |
3488 | ||
3489 | static struct rdev_sysfs_entry rdev_recovery_start = | |
3490 | __ATTR(recovery_start, S_IRUGO|S_IWUSR, recovery_start_show, recovery_start_store); | |
3491 | ||
fc974ee2 VV |
3492 | /* sysfs access to bad-blocks list. |
3493 | * We present two files. | |
3494 | * 'bad-blocks' lists sector numbers and lengths of ranges that | |
3495 | * are recorded as bad. The list is truncated to fit within | |
3496 | * the one-page limit of sysfs. | |
3497 | * Writing "sector length" to this file adds an acknowledged | |
3498 | * bad block list. | |
3499 | * 'unacknowledged-bad-blocks' lists bad blocks that have not yet | |
3500 | * been acknowledged. Writing to this file adds bad blocks | |
3501 | * without acknowledging them. This is largely for testing. | |
3502 | */ | |
3cb03002 | 3503 | static ssize_t bb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3504 | { |
3505 | return badblocks_show(&rdev->badblocks, page, 0); | |
3506 | } | |
3cb03002 | 3507 | static ssize_t bb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 | 3508 | { |
de393cde N |
3509 | int rv = badblocks_store(&rdev->badblocks, page, len, 0); |
3510 | /* Maybe that ack was all we needed */ | |
3511 | if (test_and_clear_bit(BlockedBadBlocks, &rdev->flags)) | |
3512 | wake_up(&rdev->blocked_wait); | |
3513 | return rv; | |
16c791a5 N |
3514 | } |
3515 | static struct rdev_sysfs_entry rdev_bad_blocks = | |
3516 | __ATTR(bad_blocks, S_IRUGO|S_IWUSR, bb_show, bb_store); | |
3517 | ||
3cb03002 | 3518 | static ssize_t ubb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3519 | { |
3520 | return badblocks_show(&rdev->badblocks, page, 1); | |
3521 | } | |
3cb03002 | 3522 | static ssize_t ubb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 N |
3523 | { |
3524 | return badblocks_store(&rdev->badblocks, page, len, 1); | |
3525 | } | |
3526 | static struct rdev_sysfs_entry rdev_unack_bad_blocks = | |
3527 | __ATTR(unacknowledged_bad_blocks, S_IRUGO|S_IWUSR, ubb_show, ubb_store); | |
3528 | ||
664aed04 AP |
3529 | static ssize_t |
3530 | ppl_sector_show(struct md_rdev *rdev, char *page) | |
3531 | { | |
3532 | return sprintf(page, "%llu\n", (unsigned long long)rdev->ppl.sector); | |
3533 | } | |
3534 | ||
3535 | static ssize_t | |
3536 | ppl_sector_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3537 | { | |
3538 | unsigned long long sector; | |
3539 | ||
3540 | if (kstrtoull(buf, 10, §or) < 0) | |
3541 | return -EINVAL; | |
3542 | if (sector != (sector_t)sector) | |
3543 | return -EINVAL; | |
3544 | ||
3545 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3546 | rdev->raid_disk >= 0) | |
3547 | return -EBUSY; | |
3548 | ||
3549 | if (rdev->mddev->persistent) { | |
3550 | if (rdev->mddev->major_version == 0) | |
3551 | return -EINVAL; | |
3552 | if ((sector > rdev->sb_start && | |
3553 | sector - rdev->sb_start > S16_MAX) || | |
3554 | (sector < rdev->sb_start && | |
3555 | rdev->sb_start - sector > -S16_MIN)) | |
3556 | return -EINVAL; | |
3557 | rdev->ppl.offset = sector - rdev->sb_start; | |
3558 | } else if (!rdev->mddev->external) { | |
3559 | return -EBUSY; | |
3560 | } | |
3561 | rdev->ppl.sector = sector; | |
3562 | return len; | |
3563 | } | |
3564 | ||
3565 | static struct rdev_sysfs_entry rdev_ppl_sector = | |
3566 | __ATTR(ppl_sector, S_IRUGO|S_IWUSR, ppl_sector_show, ppl_sector_store); | |
3567 | ||
3568 | static ssize_t | |
3569 | ppl_size_show(struct md_rdev *rdev, char *page) | |
3570 | { | |
3571 | return sprintf(page, "%u\n", rdev->ppl.size); | |
3572 | } | |
3573 | ||
3574 | static ssize_t | |
3575 | ppl_size_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3576 | { | |
3577 | unsigned int size; | |
3578 | ||
3579 | if (kstrtouint(buf, 10, &size) < 0) | |
3580 | return -EINVAL; | |
3581 | ||
3582 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3583 | rdev->raid_disk >= 0) | |
3584 | return -EBUSY; | |
3585 | ||
3586 | if (rdev->mddev->persistent) { | |
3587 | if (rdev->mddev->major_version == 0) | |
3588 | return -EINVAL; | |
3589 | if (size > U16_MAX) | |
3590 | return -EINVAL; | |
3591 | } else if (!rdev->mddev->external) { | |
3592 | return -EBUSY; | |
3593 | } | |
3594 | rdev->ppl.size = size; | |
3595 | return len; | |
3596 | } | |
3597 | ||
3598 | static struct rdev_sysfs_entry rdev_ppl_size = | |
3599 | __ATTR(ppl_size, S_IRUGO|S_IWUSR, ppl_size_show, ppl_size_store); | |
3600 | ||
86e6ffdd N |
3601 | static struct attribute *rdev_default_attrs[] = { |
3602 | &rdev_state.attr, | |
4dbcdc75 | 3603 | &rdev_errors.attr, |
014236d2 | 3604 | &rdev_slot.attr, |
93c8cad0 | 3605 | &rdev_offset.attr, |
c6563a8c | 3606 | &rdev_new_offset.attr, |
83303b61 | 3607 | &rdev_size.attr, |
06e3c817 | 3608 | &rdev_recovery_start.attr, |
16c791a5 N |
3609 | &rdev_bad_blocks.attr, |
3610 | &rdev_unack_bad_blocks.attr, | |
664aed04 AP |
3611 | &rdev_ppl_sector.attr, |
3612 | &rdev_ppl_size.attr, | |
86e6ffdd N |
3613 | NULL, |
3614 | }; | |
3615 | static ssize_t | |
3616 | rdev_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
3617 | { | |
3618 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3619 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
86e6ffdd N |
3620 | |
3621 | if (!entry->show) | |
3622 | return -EIO; | |
758bfc8a | 3623 | if (!rdev->mddev) |
168b305b | 3624 | return -ENODEV; |
758bfc8a | 3625 | return entry->show(rdev, page); |
86e6ffdd N |
3626 | } |
3627 | ||
3628 | static ssize_t | |
3629 | rdev_attr_store(struct kobject *kobj, struct attribute *attr, | |
3630 | const char *page, size_t length) | |
3631 | { | |
3632 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3633 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
27c529bb | 3634 | ssize_t rv; |
fd01b88c | 3635 | struct mddev *mddev = rdev->mddev; |
86e6ffdd N |
3636 | |
3637 | if (!entry->store) | |
3638 | return -EIO; | |
67463acb N |
3639 | if (!capable(CAP_SYS_ADMIN)) |
3640 | return -EACCES; | |
c42d3240 | 3641 | rv = mddev ? mddev_lock(mddev) : -ENODEV; |
ca388059 | 3642 | if (!rv) { |
27c529bb | 3643 | if (rdev->mddev == NULL) |
c42d3240 | 3644 | rv = -ENODEV; |
27c529bb N |
3645 | else |
3646 | rv = entry->store(rdev, page, length); | |
6a51830e | 3647 | mddev_unlock(mddev); |
ca388059 N |
3648 | } |
3649 | return rv; | |
86e6ffdd N |
3650 | } |
3651 | ||
3652 | static void rdev_free(struct kobject *ko) | |
3653 | { | |
3cb03002 | 3654 | struct md_rdev *rdev = container_of(ko, struct md_rdev, kobj); |
86e6ffdd N |
3655 | kfree(rdev); |
3656 | } | |
52cf25d0 | 3657 | static const struct sysfs_ops rdev_sysfs_ops = { |
86e6ffdd N |
3658 | .show = rdev_attr_show, |
3659 | .store = rdev_attr_store, | |
3660 | }; | |
3661 | static struct kobj_type rdev_ktype = { | |
3662 | .release = rdev_free, | |
3663 | .sysfs_ops = &rdev_sysfs_ops, | |
3664 | .default_attrs = rdev_default_attrs, | |
3665 | }; | |
3666 | ||
3cb03002 | 3667 | int md_rdev_init(struct md_rdev *rdev) |
e8bb9a83 N |
3668 | { |
3669 | rdev->desc_nr = -1; | |
3670 | rdev->saved_raid_disk = -1; | |
3671 | rdev->raid_disk = -1; | |
3672 | rdev->flags = 0; | |
3673 | rdev->data_offset = 0; | |
c6563a8c | 3674 | rdev->new_data_offset = 0; |
e8bb9a83 | 3675 | rdev->sb_events = 0; |
0e3ef49e | 3676 | rdev->last_read_error = 0; |
2699b672 N |
3677 | rdev->sb_loaded = 0; |
3678 | rdev->bb_page = NULL; | |
e8bb9a83 N |
3679 | atomic_set(&rdev->nr_pending, 0); |
3680 | atomic_set(&rdev->read_errors, 0); | |
3681 | atomic_set(&rdev->corrected_errors, 0); | |
3682 | ||
3683 | INIT_LIST_HEAD(&rdev->same_set); | |
3684 | init_waitqueue_head(&rdev->blocked_wait); | |
2230dfe4 N |
3685 | |
3686 | /* Add space to store bad block list. | |
3687 | * This reserves the space even on arrays where it cannot | |
3688 | * be used - I wonder if that matters | |
3689 | */ | |
fc974ee2 | 3690 | return badblocks_init(&rdev->badblocks, 0); |
e8bb9a83 N |
3691 | } |
3692 | EXPORT_SYMBOL_GPL(md_rdev_init); | |
1da177e4 LT |
3693 | /* |
3694 | * Import a device. If 'super_format' >= 0, then sanity check the superblock | |
3695 | * | |
3696 | * mark the device faulty if: | |
3697 | * | |
3698 | * - the device is nonexistent (zero size) | |
3699 | * - the device has no valid superblock | |
3700 | * | |
3701 | * a faulty rdev _never_ has rdev->sb set. | |
3702 | */ | |
3cb03002 | 3703 | static struct md_rdev *md_import_device(dev_t newdev, int super_format, int super_minor) |
1da177e4 LT |
3704 | { |
3705 | char b[BDEVNAME_SIZE]; | |
3706 | int err; | |
3cb03002 | 3707 | struct md_rdev *rdev; |
1da177e4 LT |
3708 | sector_t size; |
3709 | ||
9ffae0cf | 3710 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
9d48739e | 3711 | if (!rdev) |
1da177e4 | 3712 | return ERR_PTR(-ENOMEM); |
1da177e4 | 3713 | |
2230dfe4 N |
3714 | err = md_rdev_init(rdev); |
3715 | if (err) | |
3716 | goto abort_free; | |
3717 | err = alloc_disk_sb(rdev); | |
3718 | if (err) | |
1da177e4 LT |
3719 | goto abort_free; |
3720 | ||
c5d79adb | 3721 | err = lock_rdev(rdev, newdev, super_format == -2); |
1da177e4 LT |
3722 | if (err) |
3723 | goto abort_free; | |
3724 | ||
f9cb074b | 3725 | kobject_init(&rdev->kobj, &rdev_ktype); |
86e6ffdd | 3726 | |
77304d2a | 3727 | size = i_size_read(rdev->bdev->bd_inode) >> BLOCK_SIZE_BITS; |
1da177e4 | 3728 | if (!size) { |
9d48739e | 3729 | pr_warn("md: %s has zero or unknown size, marking faulty!\n", |
1da177e4 LT |
3730 | bdevname(rdev->bdev,b)); |
3731 | err = -EINVAL; | |
3732 | goto abort_free; | |
3733 | } | |
3734 | ||
3735 | if (super_format >= 0) { | |
3736 | err = super_types[super_format]. | |
3737 | load_super(rdev, NULL, super_minor); | |
3738 | if (err == -EINVAL) { | |
9d48739e | 3739 | pr_warn("md: %s does not have a valid v%d.%d superblock, not importing!\n", |
df968c4e | 3740 | bdevname(rdev->bdev,b), |
9d48739e | 3741 | super_format, super_minor); |
1da177e4 LT |
3742 | goto abort_free; |
3743 | } | |
3744 | if (err < 0) { | |
9d48739e | 3745 | pr_warn("md: could not read %s's sb, not importing!\n", |
1da177e4 LT |
3746 | bdevname(rdev->bdev,b)); |
3747 | goto abort_free; | |
3748 | } | |
3749 | } | |
6bfe0b49 | 3750 | |
1da177e4 LT |
3751 | return rdev; |
3752 | ||
3753 | abort_free: | |
2699b672 N |
3754 | if (rdev->bdev) |
3755 | unlock_rdev(rdev); | |
545c8795 | 3756 | md_rdev_clear(rdev); |
1da177e4 LT |
3757 | kfree(rdev); |
3758 | return ERR_PTR(err); | |
3759 | } | |
3760 | ||
3761 | /* | |
3762 | * Check a full RAID array for plausibility | |
3763 | */ | |
3764 | ||
6a5cb53a | 3765 | static int analyze_sbs(struct mddev *mddev) |
1da177e4 LT |
3766 | { |
3767 | int i; | |
3cb03002 | 3768 | struct md_rdev *rdev, *freshest, *tmp; |
1da177e4 LT |
3769 | char b[BDEVNAME_SIZE]; |
3770 | ||
3771 | freshest = NULL; | |
dafb20fa | 3772 | rdev_for_each_safe(rdev, tmp, mddev) |
1da177e4 LT |
3773 | switch (super_types[mddev->major_version]. |
3774 | load_super(rdev, freshest, mddev->minor_version)) { | |
3775 | case 1: | |
3776 | freshest = rdev; | |
3777 | break; | |
3778 | case 0: | |
3779 | break; | |
3780 | default: | |
9d48739e | 3781 | pr_warn("md: fatal superblock inconsistency in %s -- removing from array\n", |
1da177e4 | 3782 | bdevname(rdev->bdev,b)); |
fb56dfef | 3783 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3784 | } |
3785 | ||
6a5cb53a YY |
3786 | /* Cannot find a valid fresh disk */ |
3787 | if (!freshest) { | |
3788 | pr_warn("md: cannot find a valid disk\n"); | |
3789 | return -EINVAL; | |
3790 | } | |
3791 | ||
1da177e4 LT |
3792 | super_types[mddev->major_version]. |
3793 | validate_super(mddev, freshest); | |
3794 | ||
3795 | i = 0; | |
dafb20fa | 3796 | rdev_for_each_safe(rdev, tmp, mddev) { |
233fca36 N |
3797 | if (mddev->max_disks && |
3798 | (rdev->desc_nr >= mddev->max_disks || | |
3799 | i > mddev->max_disks)) { | |
9d48739e N |
3800 | pr_warn("md: %s: %s: only %d devices permitted\n", |
3801 | mdname(mddev), bdevname(rdev->bdev, b), | |
3802 | mddev->max_disks); | |
fb56dfef | 3803 | md_kick_rdev_from_array(rdev); |
de01dfad N |
3804 | continue; |
3805 | } | |
1aee41f6 | 3806 | if (rdev != freshest) { |
1da177e4 LT |
3807 | if (super_types[mddev->major_version]. |
3808 | validate_super(mddev, rdev)) { | |
9d48739e | 3809 | pr_warn("md: kicking non-fresh %s from array!\n", |
1da177e4 | 3810 | bdevname(rdev->bdev,b)); |
fb56dfef | 3811 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3812 | continue; |
3813 | } | |
1aee41f6 | 3814 | } |
1da177e4 LT |
3815 | if (mddev->level == LEVEL_MULTIPATH) { |
3816 | rdev->desc_nr = i++; | |
3817 | rdev->raid_disk = rdev->desc_nr; | |
b2d444d7 | 3818 | set_bit(In_sync, &rdev->flags); |
f2076e7d SL |
3819 | } else if (rdev->raid_disk >= |
3820 | (mddev->raid_disks - min(0, mddev->delta_disks)) && | |
3821 | !test_bit(Journal, &rdev->flags)) { | |
a778b73f N |
3822 | rdev->raid_disk = -1; |
3823 | clear_bit(In_sync, &rdev->flags); | |
1da177e4 LT |
3824 | } |
3825 | } | |
6a5cb53a YY |
3826 | |
3827 | return 0; | |
1da177e4 LT |
3828 | } |
3829 | ||
72e02075 N |
3830 | /* Read a fixed-point number. |
3831 | * Numbers in sysfs attributes should be in "standard" units where | |
3832 | * possible, so time should be in seconds. | |
f72ffdd6 | 3833 | * However we internally use a a much smaller unit such as |
72e02075 N |
3834 | * milliseconds or jiffies. |
3835 | * This function takes a decimal number with a possible fractional | |
3836 | * component, and produces an integer which is the result of | |
3837 | * multiplying that number by 10^'scale'. | |
3838 | * all without any floating-point arithmetic. | |
3839 | */ | |
3840 | int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale) | |
3841 | { | |
3842 | unsigned long result = 0; | |
3843 | long decimals = -1; | |
3844 | while (isdigit(*cp) || (*cp == '.' && decimals < 0)) { | |
3845 | if (*cp == '.') | |
3846 | decimals = 0; | |
3847 | else if (decimals < scale) { | |
3848 | unsigned int value; | |
3849 | value = *cp - '0'; | |
3850 | result = result * 10 + value; | |
3851 | if (decimals >= 0) | |
3852 | decimals++; | |
3853 | } | |
3854 | cp++; | |
3855 | } | |
3856 | if (*cp == '\n') | |
3857 | cp++; | |
3858 | if (*cp) | |
3859 | return -EINVAL; | |
3860 | if (decimals < 0) | |
3861 | decimals = 0; | |
cf891607 | 3862 | *res = result * int_pow(10, scale - decimals); |
72e02075 N |
3863 | return 0; |
3864 | } | |
3865 | ||
16f17b39 | 3866 | static ssize_t |
fd01b88c | 3867 | safe_delay_show(struct mddev *mddev, char *page) |
16f17b39 N |
3868 | { |
3869 | int msec = (mddev->safemode_delay*1000)/HZ; | |
3870 | return sprintf(page, "%d.%03d\n", msec/1000, msec%1000); | |
3871 | } | |
3872 | static ssize_t | |
fd01b88c | 3873 | safe_delay_store(struct mddev *mddev, const char *cbuf, size_t len) |
16f17b39 | 3874 | { |
16f17b39 | 3875 | unsigned long msec; |
97ce0a7f | 3876 | |
28c1b9fd | 3877 | if (mddev_is_clustered(mddev)) { |
9d48739e | 3878 | pr_warn("md: Safemode is disabled for clustered mode\n"); |
28c1b9fd GR |
3879 | return -EINVAL; |
3880 | } | |
3881 | ||
72e02075 | 3882 | if (strict_strtoul_scaled(cbuf, &msec, 3) < 0) |
16f17b39 | 3883 | return -EINVAL; |
16f17b39 N |
3884 | if (msec == 0) |
3885 | mddev->safemode_delay = 0; | |
3886 | else { | |
19052c0e | 3887 | unsigned long old_delay = mddev->safemode_delay; |
1b30e66f N |
3888 | unsigned long new_delay = (msec*HZ)/1000; |
3889 | ||
3890 | if (new_delay == 0) | |
3891 | new_delay = 1; | |
3892 | mddev->safemode_delay = new_delay; | |
3893 | if (new_delay < old_delay || old_delay == 0) | |
3894 | mod_timer(&mddev->safemode_timer, jiffies+1); | |
16f17b39 N |
3895 | } |
3896 | return len; | |
3897 | } | |
3898 | static struct md_sysfs_entry md_safe_delay = | |
80ca3a44 | 3899 | __ATTR(safe_mode_delay, S_IRUGO|S_IWUSR,safe_delay_show, safe_delay_store); |
16f17b39 | 3900 | |
eae1701f | 3901 | static ssize_t |
fd01b88c | 3902 | level_show(struct mddev *mddev, char *page) |
eae1701f | 3903 | { |
36d091f4 N |
3904 | struct md_personality *p; |
3905 | int ret; | |
3906 | spin_lock(&mddev->lock); | |
3907 | p = mddev->pers; | |
d9d166c2 | 3908 | if (p) |
36d091f4 | 3909 | ret = sprintf(page, "%s\n", p->name); |
d9d166c2 | 3910 | else if (mddev->clevel[0]) |
36d091f4 | 3911 | ret = sprintf(page, "%s\n", mddev->clevel); |
d9d166c2 | 3912 | else if (mddev->level != LEVEL_NONE) |
36d091f4 | 3913 | ret = sprintf(page, "%d\n", mddev->level); |
d9d166c2 | 3914 | else |
36d091f4 N |
3915 | ret = 0; |
3916 | spin_unlock(&mddev->lock); | |
3917 | return ret; | |
eae1701f N |
3918 | } |
3919 | ||
d9d166c2 | 3920 | static ssize_t |
fd01b88c | 3921 | level_store(struct mddev *mddev, const char *buf, size_t len) |
d9d166c2 | 3922 | { |
f2859af6 | 3923 | char clevel[16]; |
6791875e N |
3924 | ssize_t rv; |
3925 | size_t slen = len; | |
db721d32 | 3926 | struct md_personality *pers, *oldpers; |
f2859af6 | 3927 | long level; |
db721d32 | 3928 | void *priv, *oldpriv; |
3cb03002 | 3929 | struct md_rdev *rdev; |
245f46c2 | 3930 | |
6791875e N |
3931 | if (slen == 0 || slen >= sizeof(clevel)) |
3932 | return -EINVAL; | |
3933 | ||
3934 | rv = mddev_lock(mddev); | |
3935 | if (rv) | |
3936 | return rv; | |
3937 | ||
245f46c2 | 3938 | if (mddev->pers == NULL) { |
6791875e N |
3939 | strncpy(mddev->clevel, buf, slen); |
3940 | if (mddev->clevel[slen-1] == '\n') | |
3941 | slen--; | |
3942 | mddev->clevel[slen] = 0; | |
245f46c2 | 3943 | mddev->level = LEVEL_NONE; |
6791875e N |
3944 | rv = len; |
3945 | goto out_unlock; | |
245f46c2 | 3946 | } |
6791875e | 3947 | rv = -EROFS; |
bd8839e0 | 3948 | if (mddev->ro) |
6791875e | 3949 | goto out_unlock; |
245f46c2 N |
3950 | |
3951 | /* request to change the personality. Need to ensure: | |
3952 | * - array is not engaged in resync/recovery/reshape | |
3953 | * - old personality can be suspended | |
3954 | * - new personality will access other array. | |
3955 | */ | |
3956 | ||
6791875e | 3957 | rv = -EBUSY; |
bb4f1e9d | 3958 | if (mddev->sync_thread || |
f851b60d | 3959 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
bb4f1e9d N |
3960 | mddev->reshape_position != MaxSector || |
3961 | mddev->sysfs_active) | |
6791875e | 3962 | goto out_unlock; |
245f46c2 | 3963 | |
6791875e | 3964 | rv = -EINVAL; |
245f46c2 | 3965 | if (!mddev->pers->quiesce) { |
9d48739e N |
3966 | pr_warn("md: %s: %s does not support online personality change\n", |
3967 | mdname(mddev), mddev->pers->name); | |
6791875e | 3968 | goto out_unlock; |
245f46c2 N |
3969 | } |
3970 | ||
3971 | /* Now find the new personality */ | |
6791875e N |
3972 | strncpy(clevel, buf, slen); |
3973 | if (clevel[slen-1] == '\n') | |
3974 | slen--; | |
3975 | clevel[slen] = 0; | |
b29bebd6 | 3976 | if (kstrtol(clevel, 10, &level)) |
f2859af6 | 3977 | level = LEVEL_NONE; |
245f46c2 | 3978 | |
f2859af6 DW |
3979 | if (request_module("md-%s", clevel) != 0) |
3980 | request_module("md-level-%s", clevel); | |
245f46c2 | 3981 | spin_lock(&pers_lock); |
f2859af6 | 3982 | pers = find_pers(level, clevel); |
245f46c2 N |
3983 | if (!pers || !try_module_get(pers->owner)) { |
3984 | spin_unlock(&pers_lock); | |
9d48739e | 3985 | pr_warn("md: personality %s not loaded\n", clevel); |
6791875e N |
3986 | rv = -EINVAL; |
3987 | goto out_unlock; | |
245f46c2 N |
3988 | } |
3989 | spin_unlock(&pers_lock); | |
3990 | ||
3991 | if (pers == mddev->pers) { | |
3992 | /* Nothing to do! */ | |
3993 | module_put(pers->owner); | |
6791875e N |
3994 | rv = len; |
3995 | goto out_unlock; | |
245f46c2 N |
3996 | } |
3997 | if (!pers->takeover) { | |
3998 | module_put(pers->owner); | |
9d48739e N |
3999 | pr_warn("md: %s: %s does not support personality takeover\n", |
4000 | mdname(mddev), clevel); | |
6791875e N |
4001 | rv = -EINVAL; |
4002 | goto out_unlock; | |
245f46c2 N |
4003 | } |
4004 | ||
dafb20fa | 4005 | rdev_for_each(rdev, mddev) |
e93f68a1 N |
4006 | rdev->new_raid_disk = rdev->raid_disk; |
4007 | ||
245f46c2 N |
4008 | /* ->takeover must set new_* and/or delta_disks |
4009 | * if it succeeds, and may set them when it fails. | |
4010 | */ | |
4011 | priv = pers->takeover(mddev); | |
4012 | if (IS_ERR(priv)) { | |
4013 | mddev->new_level = mddev->level; | |
4014 | mddev->new_layout = mddev->layout; | |
664e7c41 | 4015 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
245f46c2 N |
4016 | mddev->raid_disks -= mddev->delta_disks; |
4017 | mddev->delta_disks = 0; | |
2c810cdd | 4018 | mddev->reshape_backwards = 0; |
245f46c2 | 4019 | module_put(pers->owner); |
9d48739e N |
4020 | pr_warn("md: %s: %s would not accept array\n", |
4021 | mdname(mddev), clevel); | |
6791875e N |
4022 | rv = PTR_ERR(priv); |
4023 | goto out_unlock; | |
245f46c2 N |
4024 | } |
4025 | ||
4026 | /* Looks like we have a winner */ | |
4027 | mddev_suspend(mddev); | |
5aa61f42 | 4028 | mddev_detach(mddev); |
36d091f4 N |
4029 | |
4030 | spin_lock(&mddev->lock); | |
db721d32 N |
4031 | oldpers = mddev->pers; |
4032 | oldpriv = mddev->private; | |
4033 | mddev->pers = pers; | |
4034 | mddev->private = priv; | |
4035 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); | |
4036 | mddev->level = mddev->new_level; | |
4037 | mddev->layout = mddev->new_layout; | |
4038 | mddev->chunk_sectors = mddev->new_chunk_sectors; | |
4039 | mddev->delta_disks = 0; | |
4040 | mddev->reshape_backwards = 0; | |
4041 | mddev->degraded = 0; | |
36d091f4 | 4042 | spin_unlock(&mddev->lock); |
db721d32 N |
4043 | |
4044 | if (oldpers->sync_request == NULL && | |
4045 | mddev->external) { | |
4046 | /* We are converting from a no-redundancy array | |
4047 | * to a redundancy array and metadata is managed | |
4048 | * externally so we need to be sure that writes | |
4049 | * won't block due to a need to transition | |
4050 | * clean->dirty | |
4051 | * until external management is started. | |
4052 | */ | |
4053 | mddev->in_sync = 0; | |
4054 | mddev->safemode_delay = 0; | |
4055 | mddev->safemode = 0; | |
4056 | } | |
f72ffdd6 | 4057 | |
db721d32 N |
4058 | oldpers->free(mddev, oldpriv); |
4059 | ||
4060 | if (oldpers->sync_request == NULL && | |
a64c876f N |
4061 | pers->sync_request != NULL) { |
4062 | /* need to add the md_redundancy_group */ | |
4063 | if (sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
4064 | pr_warn("md: cannot register extra attributes for %s\n", |
4065 | mdname(mddev)); | |
388975cc | 4066 | mddev->sysfs_action = sysfs_get_dirent(mddev->kobj.sd, "sync_action"); |
e8efa9b8 JB |
4067 | mddev->sysfs_completed = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_completed"); |
4068 | mddev->sysfs_degraded = sysfs_get_dirent_safe(mddev->kobj.sd, "degraded"); | |
f72ffdd6 | 4069 | } |
db721d32 | 4070 | if (oldpers->sync_request != NULL && |
a64c876f N |
4071 | pers->sync_request == NULL) { |
4072 | /* need to remove the md_redundancy_group */ | |
4073 | if (mddev->to_remove == NULL) | |
4074 | mddev->to_remove = &md_redundancy_group; | |
4075 | } | |
4076 | ||
4cb9da7d AO |
4077 | module_put(oldpers->owner); |
4078 | ||
dafb20fa | 4079 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
4080 | if (rdev->raid_disk < 0) |
4081 | continue; | |
bf2cb0da | 4082 | if (rdev->new_raid_disk >= mddev->raid_disks) |
e93f68a1 N |
4083 | rdev->new_raid_disk = -1; |
4084 | if (rdev->new_raid_disk == rdev->raid_disk) | |
4085 | continue; | |
36fad858 | 4086 | sysfs_unlink_rdev(mddev, rdev); |
e93f68a1 | 4087 | } |
dafb20fa | 4088 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
4089 | if (rdev->raid_disk < 0) |
4090 | continue; | |
4091 | if (rdev->new_raid_disk == rdev->raid_disk) | |
4092 | continue; | |
4093 | rdev->raid_disk = rdev->new_raid_disk; | |
4094 | if (rdev->raid_disk < 0) | |
3a981b03 | 4095 | clear_bit(In_sync, &rdev->flags); |
e93f68a1 | 4096 | else { |
36fad858 | 4097 | if (sysfs_link_rdev(mddev, rdev)) |
9d48739e N |
4098 | pr_warn("md: cannot register rd%d for %s after level change\n", |
4099 | rdev->raid_disk, mdname(mddev)); | |
3a981b03 | 4100 | } |
e93f68a1 N |
4101 | } |
4102 | ||
db721d32 | 4103 | if (pers->sync_request == NULL) { |
9af204cf TM |
4104 | /* this is now an array without redundancy, so |
4105 | * it must always be in_sync | |
4106 | */ | |
4107 | mddev->in_sync = 1; | |
4108 | del_timer_sync(&mddev->safemode_timer); | |
4109 | } | |
02e5f5c0 | 4110 | blk_set_stacking_limits(&mddev->queue->limits); |
245f46c2 | 4111 | pers->run(mddev); |
2953079c | 4112 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
47525e59 | 4113 | mddev_resume(mddev); |
830778a1 N |
4114 | if (!mddev->thread) |
4115 | md_update_sb(mddev, 1); | |
e1a86dbb | 4116 | sysfs_notify_dirent_safe(mddev->sysfs_level); |
bb7f8d22 | 4117 | md_new_event(mddev); |
6791875e N |
4118 | rv = len; |
4119 | out_unlock: | |
4120 | mddev_unlock(mddev); | |
d9d166c2 N |
4121 | return rv; |
4122 | } | |
4123 | ||
4124 | static struct md_sysfs_entry md_level = | |
80ca3a44 | 4125 | __ATTR(level, S_IRUGO|S_IWUSR, level_show, level_store); |
eae1701f | 4126 | |
d4dbd025 | 4127 | static ssize_t |
fd01b88c | 4128 | layout_show(struct mddev *mddev, char *page) |
d4dbd025 N |
4129 | { |
4130 | /* just a number, not meaningful for all levels */ | |
08a02ecd N |
4131 | if (mddev->reshape_position != MaxSector && |
4132 | mddev->layout != mddev->new_layout) | |
4133 | return sprintf(page, "%d (%d)\n", | |
4134 | mddev->new_layout, mddev->layout); | |
d4dbd025 N |
4135 | return sprintf(page, "%d\n", mddev->layout); |
4136 | } | |
4137 | ||
4138 | static ssize_t | |
fd01b88c | 4139 | layout_store(struct mddev *mddev, const char *buf, size_t len) |
d4dbd025 | 4140 | { |
4c9309c0 | 4141 | unsigned int n; |
6791875e | 4142 | int err; |
d4dbd025 | 4143 | |
4c9309c0 AD |
4144 | err = kstrtouint(buf, 10, &n); |
4145 | if (err < 0) | |
4146 | return err; | |
6791875e N |
4147 | err = mddev_lock(mddev); |
4148 | if (err) | |
4149 | return err; | |
d4dbd025 | 4150 | |
b3546035 | 4151 | if (mddev->pers) { |
50ac168a | 4152 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
4153 | err = -EBUSY; |
4154 | else if (mddev->ro) | |
4155 | err = -EROFS; | |
4156 | else { | |
4157 | mddev->new_layout = n; | |
4158 | err = mddev->pers->check_reshape(mddev); | |
4159 | if (err) | |
4160 | mddev->new_layout = mddev->layout; | |
597a711b | 4161 | } |
b3546035 | 4162 | } else { |
08a02ecd | 4163 | mddev->new_layout = n; |
b3546035 N |
4164 | if (mddev->reshape_position == MaxSector) |
4165 | mddev->layout = n; | |
4166 | } | |
6791875e N |
4167 | mddev_unlock(mddev); |
4168 | return err ?: len; | |
d4dbd025 N |
4169 | } |
4170 | static struct md_sysfs_entry md_layout = | |
80ca3a44 | 4171 | __ATTR(layout, S_IRUGO|S_IWUSR, layout_show, layout_store); |
d4dbd025 | 4172 | |
eae1701f | 4173 | static ssize_t |
fd01b88c | 4174 | raid_disks_show(struct mddev *mddev, char *page) |
eae1701f | 4175 | { |
bb636547 N |
4176 | if (mddev->raid_disks == 0) |
4177 | return 0; | |
08a02ecd N |
4178 | if (mddev->reshape_position != MaxSector && |
4179 | mddev->delta_disks != 0) | |
4180 | return sprintf(page, "%d (%d)\n", mddev->raid_disks, | |
4181 | mddev->raid_disks - mddev->delta_disks); | |
eae1701f N |
4182 | return sprintf(page, "%d\n", mddev->raid_disks); |
4183 | } | |
4184 | ||
fd01b88c | 4185 | static int update_raid_disks(struct mddev *mddev, int raid_disks); |
da943b99 N |
4186 | |
4187 | static ssize_t | |
fd01b88c | 4188 | raid_disks_store(struct mddev *mddev, const char *buf, size_t len) |
da943b99 | 4189 | { |
4c9309c0 | 4190 | unsigned int n; |
6791875e | 4191 | int err; |
da943b99 | 4192 | |
4c9309c0 AD |
4193 | err = kstrtouint(buf, 10, &n); |
4194 | if (err < 0) | |
4195 | return err; | |
da943b99 | 4196 | |
6791875e N |
4197 | err = mddev_lock(mddev); |
4198 | if (err) | |
4199 | return err; | |
da943b99 | 4200 | if (mddev->pers) |
6791875e | 4201 | err = update_raid_disks(mddev, n); |
08a02ecd | 4202 | else if (mddev->reshape_position != MaxSector) { |
c6563a8c | 4203 | struct md_rdev *rdev; |
08a02ecd | 4204 | int olddisks = mddev->raid_disks - mddev->delta_disks; |
c6563a8c | 4205 | |
6791875e | 4206 | err = -EINVAL; |
c6563a8c N |
4207 | rdev_for_each(rdev, mddev) { |
4208 | if (olddisks < n && | |
4209 | rdev->data_offset < rdev->new_data_offset) | |
6791875e | 4210 | goto out_unlock; |
c6563a8c N |
4211 | if (olddisks > n && |
4212 | rdev->data_offset > rdev->new_data_offset) | |
6791875e | 4213 | goto out_unlock; |
c6563a8c | 4214 | } |
6791875e | 4215 | err = 0; |
08a02ecd N |
4216 | mddev->delta_disks = n - olddisks; |
4217 | mddev->raid_disks = n; | |
2c810cdd | 4218 | mddev->reshape_backwards = (mddev->delta_disks < 0); |
08a02ecd | 4219 | } else |
da943b99 | 4220 | mddev->raid_disks = n; |
6791875e N |
4221 | out_unlock: |
4222 | mddev_unlock(mddev); | |
4223 | return err ? err : len; | |
da943b99 N |
4224 | } |
4225 | static struct md_sysfs_entry md_raid_disks = | |
80ca3a44 | 4226 | __ATTR(raid_disks, S_IRUGO|S_IWUSR, raid_disks_show, raid_disks_store); |
eae1701f | 4227 | |
ec164d07 SP |
4228 | static ssize_t |
4229 | uuid_show(struct mddev *mddev, char *page) | |
4230 | { | |
4231 | return sprintf(page, "%pU\n", mddev->uuid); | |
4232 | } | |
4233 | static struct md_sysfs_entry md_uuid = | |
4234 | __ATTR(uuid, S_IRUGO, uuid_show, NULL); | |
4235 | ||
3b34380a | 4236 | static ssize_t |
fd01b88c | 4237 | chunk_size_show(struct mddev *mddev, char *page) |
3b34380a | 4238 | { |
08a02ecd | 4239 | if (mddev->reshape_position != MaxSector && |
664e7c41 AN |
4240 | mddev->chunk_sectors != mddev->new_chunk_sectors) |
4241 | return sprintf(page, "%d (%d)\n", | |
4242 | mddev->new_chunk_sectors << 9, | |
9d8f0363 AN |
4243 | mddev->chunk_sectors << 9); |
4244 | return sprintf(page, "%d\n", mddev->chunk_sectors << 9); | |
3b34380a N |
4245 | } |
4246 | ||
4247 | static ssize_t | |
fd01b88c | 4248 | chunk_size_store(struct mddev *mddev, const char *buf, size_t len) |
3b34380a | 4249 | { |
4c9309c0 | 4250 | unsigned long n; |
6791875e | 4251 | int err; |
3b34380a | 4252 | |
4c9309c0 AD |
4253 | err = kstrtoul(buf, 10, &n); |
4254 | if (err < 0) | |
4255 | return err; | |
3b34380a | 4256 | |
6791875e N |
4257 | err = mddev_lock(mddev); |
4258 | if (err) | |
4259 | return err; | |
b3546035 | 4260 | if (mddev->pers) { |
50ac168a | 4261 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
4262 | err = -EBUSY; |
4263 | else if (mddev->ro) | |
4264 | err = -EROFS; | |
4265 | else { | |
4266 | mddev->new_chunk_sectors = n >> 9; | |
4267 | err = mddev->pers->check_reshape(mddev); | |
4268 | if (err) | |
4269 | mddev->new_chunk_sectors = mddev->chunk_sectors; | |
597a711b | 4270 | } |
b3546035 | 4271 | } else { |
664e7c41 | 4272 | mddev->new_chunk_sectors = n >> 9; |
b3546035 | 4273 | if (mddev->reshape_position == MaxSector) |
9d8f0363 | 4274 | mddev->chunk_sectors = n >> 9; |
b3546035 | 4275 | } |
6791875e N |
4276 | mddev_unlock(mddev); |
4277 | return err ?: len; | |
3b34380a N |
4278 | } |
4279 | static struct md_sysfs_entry md_chunk_size = | |
80ca3a44 | 4280 | __ATTR(chunk_size, S_IRUGO|S_IWUSR, chunk_size_show, chunk_size_store); |
3b34380a | 4281 | |
a94213b1 | 4282 | static ssize_t |
fd01b88c | 4283 | resync_start_show(struct mddev *mddev, char *page) |
a94213b1 | 4284 | { |
d1a7c503 N |
4285 | if (mddev->recovery_cp == MaxSector) |
4286 | return sprintf(page, "none\n"); | |
a94213b1 N |
4287 | return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp); |
4288 | } | |
4289 | ||
4290 | static ssize_t | |
fd01b88c | 4291 | resync_start_store(struct mddev *mddev, const char *buf, size_t len) |
a94213b1 | 4292 | { |
4c9309c0 | 4293 | unsigned long long n; |
6791875e | 4294 | int err; |
4c9309c0 AD |
4295 | |
4296 | if (cmd_match(buf, "none")) | |
4297 | n = MaxSector; | |
4298 | else { | |
4299 | err = kstrtoull(buf, 10, &n); | |
4300 | if (err < 0) | |
4301 | return err; | |
4302 | if (n != (sector_t)n) | |
4303 | return -EINVAL; | |
4304 | } | |
a94213b1 | 4305 | |
6791875e N |
4306 | err = mddev_lock(mddev); |
4307 | if (err) | |
4308 | return err; | |
b098636c | 4309 | if (mddev->pers && !test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) |
6791875e | 4310 | err = -EBUSY; |
a94213b1 | 4311 | |
6791875e N |
4312 | if (!err) { |
4313 | mddev->recovery_cp = n; | |
4314 | if (mddev->pers) | |
2953079c | 4315 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
6791875e N |
4316 | } |
4317 | mddev_unlock(mddev); | |
4318 | return err ?: len; | |
a94213b1 N |
4319 | } |
4320 | static struct md_sysfs_entry md_resync_start = | |
750f199e N |
4321 | __ATTR_PREALLOC(resync_start, S_IRUGO|S_IWUSR, |
4322 | resync_start_show, resync_start_store); | |
a94213b1 | 4323 | |
9e653b63 N |
4324 | /* |
4325 | * The array state can be: | |
4326 | * | |
4327 | * clear | |
4328 | * No devices, no size, no level | |
4329 | * Equivalent to STOP_ARRAY ioctl | |
4330 | * inactive | |
4331 | * May have some settings, but array is not active | |
4332 | * all IO results in error | |
4333 | * When written, doesn't tear down array, but just stops it | |
4334 | * suspended (not supported yet) | |
4335 | * All IO requests will block. The array can be reconfigured. | |
910d8cb3 | 4336 | * Writing this, if accepted, will block until array is quiescent |
9e653b63 N |
4337 | * readonly |
4338 | * no resync can happen. no superblocks get written. | |
4339 | * write requests fail | |
4340 | * read-auto | |
4341 | * like readonly, but behaves like 'clean' on a write request. | |
4342 | * | |
4343 | * clean - no pending writes, but otherwise active. | |
4344 | * When written to inactive array, starts without resync | |
4345 | * If a write request arrives then | |
4346 | * if metadata is known, mark 'dirty' and switch to 'active'. | |
4347 | * if not known, block and switch to write-pending | |
4348 | * If written to an active array that has pending writes, then fails. | |
4349 | * active | |
4350 | * fully active: IO and resync can be happening. | |
4351 | * When written to inactive array, starts with resync | |
4352 | * | |
4353 | * write-pending | |
4354 | * clean, but writes are blocked waiting for 'active' to be written. | |
4355 | * | |
4356 | * active-idle | |
4357 | * like active, but no writes have been seen for a while (100msec). | |
4358 | * | |
62f7b198 GP |
4359 | * broken |
4360 | * RAID0/LINEAR-only: same as clean, but array is missing a member. | |
4361 | * It's useful because RAID0/LINEAR mounted-arrays aren't stopped | |
4362 | * when a member is gone, so this state will at least alert the | |
4363 | * user that something is wrong. | |
9e653b63 N |
4364 | */ |
4365 | enum array_state { clear, inactive, suspended, readonly, read_auto, clean, active, | |
62f7b198 | 4366 | write_pending, active_idle, broken, bad_word}; |
05381954 | 4367 | static char *array_states[] = { |
9e653b63 | 4368 | "clear", "inactive", "suspended", "readonly", "read-auto", "clean", "active", |
62f7b198 | 4369 | "write-pending", "active-idle", "broken", NULL }; |
9e653b63 N |
4370 | |
4371 | static int match_word(const char *word, char **list) | |
4372 | { | |
4373 | int n; | |
4374 | for (n=0; list[n]; n++) | |
4375 | if (cmd_match(word, list[n])) | |
4376 | break; | |
4377 | return n; | |
4378 | } | |
4379 | ||
4380 | static ssize_t | |
fd01b88c | 4381 | array_state_show(struct mddev *mddev, char *page) |
9e653b63 N |
4382 | { |
4383 | enum array_state st = inactive; | |
4384 | ||
62f7b198 | 4385 | if (mddev->pers && !test_bit(MD_NOT_READY, &mddev->flags)) { |
9e653b63 N |
4386 | switch(mddev->ro) { |
4387 | case 1: | |
4388 | st = readonly; | |
4389 | break; | |
4390 | case 2: | |
4391 | st = read_auto; | |
4392 | break; | |
4393 | case 0: | |
55cc39f3 | 4394 | spin_lock(&mddev->lock); |
2953079c | 4395 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
e691063a | 4396 | st = write_pending; |
16f88949 TM |
4397 | else if (mddev->in_sync) |
4398 | st = clean; | |
9e653b63 N |
4399 | else if (mddev->safemode) |
4400 | st = active_idle; | |
4401 | else | |
4402 | st = active; | |
55cc39f3 | 4403 | spin_unlock(&mddev->lock); |
9e653b63 | 4404 | } |
62f7b198 GP |
4405 | |
4406 | if (test_bit(MD_BROKEN, &mddev->flags) && st == clean) | |
4407 | st = broken; | |
4408 | } else { | |
9e653b63 N |
4409 | if (list_empty(&mddev->disks) && |
4410 | mddev->raid_disks == 0 && | |
58c0fed4 | 4411 | mddev->dev_sectors == 0) |
9e653b63 N |
4412 | st = clear; |
4413 | else | |
4414 | st = inactive; | |
4415 | } | |
4416 | return sprintf(page, "%s\n", array_states[st]); | |
4417 | } | |
4418 | ||
f72ffdd6 N |
4419 | static int do_md_stop(struct mddev *mddev, int ro, struct block_device *bdev); |
4420 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev); | |
fd01b88c | 4421 | static int restart_array(struct mddev *mddev); |
9e653b63 N |
4422 | |
4423 | static ssize_t | |
fd01b88c | 4424 | array_state_store(struct mddev *mddev, const char *buf, size_t len) |
9e653b63 | 4425 | { |
6497709b | 4426 | int err = 0; |
9e653b63 | 4427 | enum array_state st = match_word(buf, array_states); |
6791875e N |
4428 | |
4429 | if (mddev->pers && (st == active || st == clean) && mddev->ro != 1) { | |
4430 | /* don't take reconfig_mutex when toggling between | |
4431 | * clean and active | |
4432 | */ | |
4433 | spin_lock(&mddev->lock); | |
4434 | if (st == active) { | |
4435 | restart_array(mddev); | |
2953079c | 4436 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
91a6c4ad | 4437 | md_wakeup_thread(mddev->thread); |
6791875e | 4438 | wake_up(&mddev->sb_wait); |
6791875e N |
4439 | } else /* st == clean */ { |
4440 | restart_array(mddev); | |
6497709b | 4441 | if (!set_in_sync(mddev)) |
6791875e N |
4442 | err = -EBUSY; |
4443 | } | |
573275b5 TM |
4444 | if (!err) |
4445 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
6791875e | 4446 | spin_unlock(&mddev->lock); |
c008f1d3 | 4447 | return err ?: len; |
6791875e N |
4448 | } |
4449 | err = mddev_lock(mddev); | |
4450 | if (err) | |
4451 | return err; | |
4452 | err = -EINVAL; | |
9e653b63 N |
4453 | switch(st) { |
4454 | case bad_word: | |
4455 | break; | |
4456 | case clear: | |
4457 | /* stopping an active array */ | |
a05b7ea0 | 4458 | err = do_md_stop(mddev, 0, NULL); |
9e653b63 N |
4459 | break; |
4460 | case inactive: | |
4461 | /* stopping an active array */ | |
90cf195d | 4462 | if (mddev->pers) |
a05b7ea0 | 4463 | err = do_md_stop(mddev, 2, NULL); |
90cf195d | 4464 | else |
e691063a | 4465 | err = 0; /* already inactive */ |
9e653b63 N |
4466 | break; |
4467 | case suspended: | |
4468 | break; /* not supported yet */ | |
4469 | case readonly: | |
4470 | if (mddev->pers) | |
a05b7ea0 | 4471 | err = md_set_readonly(mddev, NULL); |
9e653b63 N |
4472 | else { |
4473 | mddev->ro = 1; | |
648b629e | 4474 | set_disk_ro(mddev->gendisk, 1); |
9e653b63 N |
4475 | err = do_md_run(mddev); |
4476 | } | |
4477 | break; | |
4478 | case read_auto: | |
9e653b63 | 4479 | if (mddev->pers) { |
80268ee9 | 4480 | if (mddev->ro == 0) |
a05b7ea0 | 4481 | err = md_set_readonly(mddev, NULL); |
80268ee9 | 4482 | else if (mddev->ro == 1) |
648b629e N |
4483 | err = restart_array(mddev); |
4484 | if (err == 0) { | |
4485 | mddev->ro = 2; | |
4486 | set_disk_ro(mddev->gendisk, 0); | |
4487 | } | |
9e653b63 N |
4488 | } else { |
4489 | mddev->ro = 2; | |
4490 | err = do_md_run(mddev); | |
4491 | } | |
4492 | break; | |
4493 | case clean: | |
4494 | if (mddev->pers) { | |
339421de SL |
4495 | err = restart_array(mddev); |
4496 | if (err) | |
4497 | break; | |
85572d7c | 4498 | spin_lock(&mddev->lock); |
6497709b | 4499 | if (!set_in_sync(mddev)) |
e691063a | 4500 | err = -EBUSY; |
85572d7c | 4501 | spin_unlock(&mddev->lock); |
5bf29597 N |
4502 | } else |
4503 | err = -EINVAL; | |
9e653b63 N |
4504 | break; |
4505 | case active: | |
4506 | if (mddev->pers) { | |
339421de SL |
4507 | err = restart_array(mddev); |
4508 | if (err) | |
4509 | break; | |
2953079c | 4510 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
9e653b63 N |
4511 | wake_up(&mddev->sb_wait); |
4512 | err = 0; | |
4513 | } else { | |
4514 | mddev->ro = 0; | |
648b629e | 4515 | set_disk_ro(mddev->gendisk, 0); |
9e653b63 N |
4516 | err = do_md_run(mddev); |
4517 | } | |
4518 | break; | |
4519 | case write_pending: | |
4520 | case active_idle: | |
62f7b198 | 4521 | case broken: |
9e653b63 N |
4522 | /* these cannot be set */ |
4523 | break; | |
4524 | } | |
6791875e N |
4525 | |
4526 | if (!err) { | |
1d23f178 N |
4527 | if (mddev->hold_active == UNTIL_IOCTL) |
4528 | mddev->hold_active = 0; | |
00bcb4ac | 4529 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 4530 | } |
6791875e N |
4531 | mddev_unlock(mddev); |
4532 | return err ?: len; | |
9e653b63 | 4533 | } |
80ca3a44 | 4534 | static struct md_sysfs_entry md_array_state = |
750f199e | 4535 | __ATTR_PREALLOC(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store); |
9e653b63 | 4536 | |
1e50915f | 4537 | static ssize_t |
fd01b88c | 4538 | max_corrected_read_errors_show(struct mddev *mddev, char *page) { |
1e50915f RB |
4539 | return sprintf(page, "%d\n", |
4540 | atomic_read(&mddev->max_corr_read_errors)); | |
4541 | } | |
4542 | ||
4543 | static ssize_t | |
fd01b88c | 4544 | max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len) |
1e50915f | 4545 | { |
4c9309c0 AD |
4546 | unsigned int n; |
4547 | int rv; | |
1e50915f | 4548 | |
4c9309c0 AD |
4549 | rv = kstrtouint(buf, 10, &n); |
4550 | if (rv < 0) | |
4551 | return rv; | |
4552 | atomic_set(&mddev->max_corr_read_errors, n); | |
4553 | return len; | |
1e50915f RB |
4554 | } |
4555 | ||
4556 | static struct md_sysfs_entry max_corr_read_errors = | |
4557 | __ATTR(max_read_errors, S_IRUGO|S_IWUSR, max_corrected_read_errors_show, | |
4558 | max_corrected_read_errors_store); | |
4559 | ||
6d7ff738 | 4560 | static ssize_t |
fd01b88c | 4561 | null_show(struct mddev *mddev, char *page) |
6d7ff738 N |
4562 | { |
4563 | return -EINVAL; | |
4564 | } | |
4565 | ||
cc1ffe61 GJ |
4566 | /* need to ensure rdev_delayed_delete() has completed */ |
4567 | static void flush_rdev_wq(struct mddev *mddev) | |
4568 | { | |
4569 | struct md_rdev *rdev; | |
4570 | ||
4571 | rcu_read_lock(); | |
4572 | rdev_for_each_rcu(rdev, mddev) | |
4573 | if (work_pending(&rdev->del_work)) { | |
4574 | flush_workqueue(md_rdev_misc_wq); | |
4575 | break; | |
4576 | } | |
4577 | rcu_read_unlock(); | |
4578 | } | |
4579 | ||
6d7ff738 | 4580 | static ssize_t |
fd01b88c | 4581 | new_dev_store(struct mddev *mddev, const char *buf, size_t len) |
6d7ff738 N |
4582 | { |
4583 | /* buf must be %d:%d\n? giving major and minor numbers */ | |
4584 | /* The new device is added to the array. | |
4585 | * If the array has a persistent superblock, we read the | |
4586 | * superblock to initialise info and check validity. | |
4587 | * Otherwise, only checking done is that in bind_rdev_to_array, | |
4588 | * which mainly checks size. | |
4589 | */ | |
4590 | char *e; | |
4591 | int major = simple_strtoul(buf, &e, 10); | |
4592 | int minor; | |
4593 | dev_t dev; | |
3cb03002 | 4594 | struct md_rdev *rdev; |
6d7ff738 N |
4595 | int err; |
4596 | ||
4597 | if (!*buf || *e != ':' || !e[1] || e[1] == '\n') | |
4598 | return -EINVAL; | |
4599 | minor = simple_strtoul(e+1, &e, 10); | |
4600 | if (*e && *e != '\n') | |
4601 | return -EINVAL; | |
4602 | dev = MKDEV(major, minor); | |
4603 | if (major != MAJOR(dev) || | |
4604 | minor != MINOR(dev)) | |
4605 | return -EOVERFLOW; | |
4606 | ||
cc1ffe61 | 4607 | flush_rdev_wq(mddev); |
6791875e N |
4608 | err = mddev_lock(mddev); |
4609 | if (err) | |
4610 | return err; | |
6d7ff738 N |
4611 | if (mddev->persistent) { |
4612 | rdev = md_import_device(dev, mddev->major_version, | |
4613 | mddev->minor_version); | |
4614 | if (!IS_ERR(rdev) && !list_empty(&mddev->disks)) { | |
3cb03002 N |
4615 | struct md_rdev *rdev0 |
4616 | = list_entry(mddev->disks.next, | |
4617 | struct md_rdev, same_set); | |
6d7ff738 N |
4618 | err = super_types[mddev->major_version] |
4619 | .load_super(rdev, rdev0, mddev->minor_version); | |
4620 | if (err < 0) | |
4621 | goto out; | |
4622 | } | |
c5d79adb N |
4623 | } else if (mddev->external) |
4624 | rdev = md_import_device(dev, -2, -1); | |
4625 | else | |
6d7ff738 N |
4626 | rdev = md_import_device(dev, -1, -1); |
4627 | ||
9a8c0fa8 N |
4628 | if (IS_ERR(rdev)) { |
4629 | mddev_unlock(mddev); | |
6d7ff738 | 4630 | return PTR_ERR(rdev); |
9a8c0fa8 | 4631 | } |
6d7ff738 N |
4632 | err = bind_rdev_to_array(rdev, mddev); |
4633 | out: | |
4634 | if (err) | |
4635 | export_rdev(rdev); | |
6791875e | 4636 | mddev_unlock(mddev); |
5492c46e AO |
4637 | if (!err) |
4638 | md_new_event(mddev); | |
6d7ff738 N |
4639 | return err ? err : len; |
4640 | } | |
4641 | ||
4642 | static struct md_sysfs_entry md_new_device = | |
80ca3a44 | 4643 | __ATTR(new_dev, S_IWUSR, null_show, new_dev_store); |
3b34380a | 4644 | |
9b1d1dac | 4645 | static ssize_t |
fd01b88c | 4646 | bitmap_store(struct mddev *mddev, const char *buf, size_t len) |
9b1d1dac PC |
4647 | { |
4648 | char *end; | |
4649 | unsigned long chunk, end_chunk; | |
6791875e | 4650 | int err; |
9b1d1dac | 4651 | |
6791875e N |
4652 | err = mddev_lock(mddev); |
4653 | if (err) | |
4654 | return err; | |
9b1d1dac PC |
4655 | if (!mddev->bitmap) |
4656 | goto out; | |
4657 | /* buf should be <chunk> <chunk> ... or <chunk>-<chunk> ... (range) */ | |
4658 | while (*buf) { | |
4659 | chunk = end_chunk = simple_strtoul(buf, &end, 0); | |
4660 | if (buf == end) break; | |
4661 | if (*end == '-') { /* range */ | |
4662 | buf = end + 1; | |
4663 | end_chunk = simple_strtoul(buf, &end, 0); | |
4664 | if (buf == end) break; | |
4665 | } | |
4666 | if (*end && !isspace(*end)) break; | |
e64e4018 | 4667 | md_bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk); |
e7d2860b | 4668 | buf = skip_spaces(end); |
9b1d1dac | 4669 | } |
e64e4018 | 4670 | md_bitmap_unplug(mddev->bitmap); /* flush the bits to disk */ |
9b1d1dac | 4671 | out: |
6791875e | 4672 | mddev_unlock(mddev); |
9b1d1dac PC |
4673 | return len; |
4674 | } | |
4675 | ||
4676 | static struct md_sysfs_entry md_bitmap = | |
4677 | __ATTR(bitmap_set_bits, S_IWUSR, null_show, bitmap_store); | |
4678 | ||
a35b0d69 | 4679 | static ssize_t |
fd01b88c | 4680 | size_show(struct mddev *mddev, char *page) |
a35b0d69 | 4681 | { |
58c0fed4 AN |
4682 | return sprintf(page, "%llu\n", |
4683 | (unsigned long long)mddev->dev_sectors / 2); | |
a35b0d69 N |
4684 | } |
4685 | ||
fd01b88c | 4686 | static int update_size(struct mddev *mddev, sector_t num_sectors); |
a35b0d69 N |
4687 | |
4688 | static ssize_t | |
fd01b88c | 4689 | size_store(struct mddev *mddev, const char *buf, size_t len) |
a35b0d69 N |
4690 | { |
4691 | /* If array is inactive, we can reduce the component size, but | |
4692 | * not increase it (except from 0). | |
4693 | * If array is active, we can try an on-line resize | |
4694 | */ | |
b522adcd DW |
4695 | sector_t sectors; |
4696 | int err = strict_blocks_to_sectors(buf, §ors); | |
a35b0d69 | 4697 | |
58c0fed4 AN |
4698 | if (err < 0) |
4699 | return err; | |
6791875e N |
4700 | err = mddev_lock(mddev); |
4701 | if (err) | |
4702 | return err; | |
a35b0d69 | 4703 | if (mddev->pers) { |
58c0fed4 | 4704 | err = update_size(mddev, sectors); |
4ba1e788 XN |
4705 | if (err == 0) |
4706 | md_update_sb(mddev, 1); | |
a35b0d69 | 4707 | } else { |
58c0fed4 AN |
4708 | if (mddev->dev_sectors == 0 || |
4709 | mddev->dev_sectors > sectors) | |
4710 | mddev->dev_sectors = sectors; | |
a35b0d69 N |
4711 | else |
4712 | err = -ENOSPC; | |
4713 | } | |
6791875e | 4714 | mddev_unlock(mddev); |
a35b0d69 N |
4715 | return err ? err : len; |
4716 | } | |
4717 | ||
4718 | static struct md_sysfs_entry md_size = | |
80ca3a44 | 4719 | __ATTR(component_size, S_IRUGO|S_IWUSR, size_show, size_store); |
a35b0d69 | 4720 | |
83f0d77a | 4721 | /* Metadata version. |
e691063a N |
4722 | * This is one of |
4723 | * 'none' for arrays with no metadata (good luck...) | |
4724 | * 'external' for arrays with externally managed metadata, | |
8bb93aac N |
4725 | * or N.M for internally known formats |
4726 | */ | |
4727 | static ssize_t | |
fd01b88c | 4728 | metadata_show(struct mddev *mddev, char *page) |
8bb93aac N |
4729 | { |
4730 | if (mddev->persistent) | |
4731 | return sprintf(page, "%d.%d\n", | |
4732 | mddev->major_version, mddev->minor_version); | |
e691063a N |
4733 | else if (mddev->external) |
4734 | return sprintf(page, "external:%s\n", mddev->metadata_type); | |
8bb93aac N |
4735 | else |
4736 | return sprintf(page, "none\n"); | |
4737 | } | |
4738 | ||
4739 | static ssize_t | |
fd01b88c | 4740 | metadata_store(struct mddev *mddev, const char *buf, size_t len) |
8bb93aac N |
4741 | { |
4742 | int major, minor; | |
4743 | char *e; | |
6791875e | 4744 | int err; |
ea43ddd8 N |
4745 | /* Changing the details of 'external' metadata is |
4746 | * always permitted. Otherwise there must be | |
4747 | * no devices attached to the array. | |
4748 | */ | |
6791875e N |
4749 | |
4750 | err = mddev_lock(mddev); | |
4751 | if (err) | |
4752 | return err; | |
4753 | err = -EBUSY; | |
ea43ddd8 N |
4754 | if (mddev->external && strncmp(buf, "external:", 9) == 0) |
4755 | ; | |
4756 | else if (!list_empty(&mddev->disks)) | |
6791875e | 4757 | goto out_unlock; |
8bb93aac | 4758 | |
6791875e | 4759 | err = 0; |
8bb93aac N |
4760 | if (cmd_match(buf, "none")) { |
4761 | mddev->persistent = 0; | |
e691063a N |
4762 | mddev->external = 0; |
4763 | mddev->major_version = 0; | |
4764 | mddev->minor_version = 90; | |
6791875e | 4765 | goto out_unlock; |
e691063a N |
4766 | } |
4767 | if (strncmp(buf, "external:", 9) == 0) { | |
20a49ff6 | 4768 | size_t namelen = len-9; |
e691063a N |
4769 | if (namelen >= sizeof(mddev->metadata_type)) |
4770 | namelen = sizeof(mddev->metadata_type)-1; | |
4771 | strncpy(mddev->metadata_type, buf+9, namelen); | |
4772 | mddev->metadata_type[namelen] = 0; | |
4773 | if (namelen && mddev->metadata_type[namelen-1] == '\n') | |
4774 | mddev->metadata_type[--namelen] = 0; | |
4775 | mddev->persistent = 0; | |
4776 | mddev->external = 1; | |
8bb93aac N |
4777 | mddev->major_version = 0; |
4778 | mddev->minor_version = 90; | |
6791875e | 4779 | goto out_unlock; |
8bb93aac N |
4780 | } |
4781 | major = simple_strtoul(buf, &e, 10); | |
6791875e | 4782 | err = -EINVAL; |
8bb93aac | 4783 | if (e==buf || *e != '.') |
6791875e | 4784 | goto out_unlock; |
8bb93aac N |
4785 | buf = e+1; |
4786 | minor = simple_strtoul(buf, &e, 10); | |
3f9d7b0d | 4787 | if (e==buf || (*e && *e != '\n') ) |
6791875e N |
4788 | goto out_unlock; |
4789 | err = -ENOENT; | |
50511da3 | 4790 | if (major >= ARRAY_SIZE(super_types) || super_types[major].name == NULL) |
6791875e | 4791 | goto out_unlock; |
8bb93aac N |
4792 | mddev->major_version = major; |
4793 | mddev->minor_version = minor; | |
4794 | mddev->persistent = 1; | |
e691063a | 4795 | mddev->external = 0; |
6791875e N |
4796 | err = 0; |
4797 | out_unlock: | |
4798 | mddev_unlock(mddev); | |
4799 | return err ?: len; | |
8bb93aac N |
4800 | } |
4801 | ||
4802 | static struct md_sysfs_entry md_metadata = | |
750f199e | 4803 | __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store); |
8bb93aac | 4804 | |
24dd469d | 4805 | static ssize_t |
fd01b88c | 4806 | action_show(struct mddev *mddev, char *page) |
24dd469d | 4807 | { |
7eec314d | 4808 | char *type = "idle"; |
b7b17c9b N |
4809 | unsigned long recovery = mddev->recovery; |
4810 | if (test_bit(MD_RECOVERY_FROZEN, &recovery)) | |
b6a9ce68 | 4811 | type = "frozen"; |
b7b17c9b N |
4812 | else if (test_bit(MD_RECOVERY_RUNNING, &recovery) || |
4813 | (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &recovery))) { | |
4814 | if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) | |
ccfcc3c1 | 4815 | type = "reshape"; |
b7b17c9b N |
4816 | else if (test_bit(MD_RECOVERY_SYNC, &recovery)) { |
4817 | if (!test_bit(MD_RECOVERY_REQUESTED, &recovery)) | |
24dd469d | 4818 | type = "resync"; |
b7b17c9b | 4819 | else if (test_bit(MD_RECOVERY_CHECK, &recovery)) |
24dd469d N |
4820 | type = "check"; |
4821 | else | |
4822 | type = "repair"; | |
b7b17c9b | 4823 | } else if (test_bit(MD_RECOVERY_RECOVER, &recovery)) |
24dd469d | 4824 | type = "recover"; |
985ca973 N |
4825 | else if (mddev->reshape_position != MaxSector) |
4826 | type = "reshape"; | |
24dd469d N |
4827 | } |
4828 | return sprintf(page, "%s\n", type); | |
4829 | } | |
4830 | ||
4831 | static ssize_t | |
fd01b88c | 4832 | action_store(struct mddev *mddev, const char *page, size_t len) |
24dd469d | 4833 | { |
7eec314d N |
4834 | if (!mddev->pers || !mddev->pers->sync_request) |
4835 | return -EINVAL; | |
4836 | ||
b6a9ce68 N |
4837 | |
4838 | if (cmd_match(page, "idle") || cmd_match(page, "frozen")) { | |
56ccc112 N |
4839 | if (cmd_match(page, "frozen")) |
4840 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4841 | else | |
4842 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
8e8e2518 N |
4843 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
4844 | mddev_lock(mddev) == 0) { | |
cc1ffe61 GJ |
4845 | if (work_pending(&mddev->del_work)) |
4846 | flush_workqueue(md_misc_wq); | |
8e8e2518 N |
4847 | if (mddev->sync_thread) { |
4848 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
6791875e | 4849 | md_reap_sync_thread(mddev); |
6791875e | 4850 | } |
8e8e2518 | 4851 | mddev_unlock(mddev); |
7eec314d | 4852 | } |
312045ee | 4853 | } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
24dd469d | 4854 | return -EBUSY; |
72a23c21 | 4855 | else if (cmd_match(page, "resync")) |
56ccc112 | 4856 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4857 | else if (cmd_match(page, "recover")) { |
56ccc112 | 4858 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4859 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
72a23c21 | 4860 | } else if (cmd_match(page, "reshape")) { |
16484bf5 N |
4861 | int err; |
4862 | if (mddev->pers->start_reshape == NULL) | |
4863 | return -EINVAL; | |
6791875e N |
4864 | err = mddev_lock(mddev); |
4865 | if (!err) { | |
312045ee N |
4866 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4867 | err = -EBUSY; | |
4868 | else { | |
4869 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4870 | err = mddev->pers->start_reshape(mddev); | |
4871 | } | |
6791875e N |
4872 | mddev_unlock(mddev); |
4873 | } | |
16484bf5 N |
4874 | if (err) |
4875 | return err; | |
e1a86dbb | 4876 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
16484bf5 | 4877 | } else { |
bce74dac | 4878 | if (cmd_match(page, "check")) |
7eec314d | 4879 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
2adc7d47 | 4880 | else if (!cmd_match(page, "repair")) |
7eec314d | 4881 | return -EINVAL; |
56ccc112 | 4882 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
7eec314d N |
4883 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
4884 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
7eec314d | 4885 | } |
48c26ddc N |
4886 | if (mddev->ro == 2) { |
4887 | /* A write to sync_action is enough to justify | |
4888 | * canceling read-auto mode | |
4889 | */ | |
4890 | mddev->ro = 0; | |
4891 | md_wakeup_thread(mddev->sync_thread); | |
4892 | } | |
03c902e1 | 4893 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
24dd469d | 4894 | md_wakeup_thread(mddev->thread); |
00bcb4ac | 4895 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
24dd469d N |
4896 | return len; |
4897 | } | |
4898 | ||
c4a39551 | 4899 | static struct md_sysfs_entry md_scan_mode = |
750f199e | 4900 | __ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store); |
c4a39551 JB |
4901 | |
4902 | static ssize_t | |
4903 | last_sync_action_show(struct mddev *mddev, char *page) | |
4904 | { | |
4905 | return sprintf(page, "%s\n", mddev->last_sync_action); | |
4906 | } | |
4907 | ||
4908 | static struct md_sysfs_entry md_last_scan_mode = __ATTR_RO(last_sync_action); | |
4909 | ||
9d88883e | 4910 | static ssize_t |
fd01b88c | 4911 | mismatch_cnt_show(struct mddev *mddev, char *page) |
9d88883e N |
4912 | { |
4913 | return sprintf(page, "%llu\n", | |
7f7583d4 JM |
4914 | (unsigned long long) |
4915 | atomic64_read(&mddev->resync_mismatches)); | |
9d88883e N |
4916 | } |
4917 | ||
80ca3a44 | 4918 | static struct md_sysfs_entry md_mismatches = __ATTR_RO(mismatch_cnt); |
9d88883e | 4919 | |
88202a0c | 4920 | static ssize_t |
fd01b88c | 4921 | sync_min_show(struct mddev *mddev, char *page) |
88202a0c N |
4922 | { |
4923 | return sprintf(page, "%d (%s)\n", speed_min(mddev), | |
4924 | mddev->sync_speed_min ? "local": "system"); | |
4925 | } | |
4926 | ||
4927 | static ssize_t | |
fd01b88c | 4928 | sync_min_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4929 | { |
4c9309c0 AD |
4930 | unsigned int min; |
4931 | int rv; | |
4932 | ||
88202a0c | 4933 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4934 | min = 0; |
4935 | } else { | |
4936 | rv = kstrtouint(buf, 10, &min); | |
4937 | if (rv < 0) | |
4938 | return rv; | |
4939 | if (min == 0) | |
4940 | return -EINVAL; | |
88202a0c | 4941 | } |
88202a0c N |
4942 | mddev->sync_speed_min = min; |
4943 | return len; | |
4944 | } | |
4945 | ||
4946 | static struct md_sysfs_entry md_sync_min = | |
4947 | __ATTR(sync_speed_min, S_IRUGO|S_IWUSR, sync_min_show, sync_min_store); | |
4948 | ||
4949 | static ssize_t | |
fd01b88c | 4950 | sync_max_show(struct mddev *mddev, char *page) |
88202a0c N |
4951 | { |
4952 | return sprintf(page, "%d (%s)\n", speed_max(mddev), | |
4953 | mddev->sync_speed_max ? "local": "system"); | |
4954 | } | |
4955 | ||
4956 | static ssize_t | |
fd01b88c | 4957 | sync_max_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4958 | { |
4c9309c0 AD |
4959 | unsigned int max; |
4960 | int rv; | |
4961 | ||
88202a0c | 4962 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4963 | max = 0; |
4964 | } else { | |
4965 | rv = kstrtouint(buf, 10, &max); | |
4966 | if (rv < 0) | |
4967 | return rv; | |
4968 | if (max == 0) | |
4969 | return -EINVAL; | |
88202a0c | 4970 | } |
88202a0c N |
4971 | mddev->sync_speed_max = max; |
4972 | return len; | |
4973 | } | |
4974 | ||
4975 | static struct md_sysfs_entry md_sync_max = | |
4976 | __ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store); | |
4977 | ||
d7f3d291 | 4978 | static ssize_t |
fd01b88c | 4979 | degraded_show(struct mddev *mddev, char *page) |
d7f3d291 IP |
4980 | { |
4981 | return sprintf(page, "%d\n", mddev->degraded); | |
4982 | } | |
4983 | static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded); | |
88202a0c | 4984 | |
90b08710 | 4985 | static ssize_t |
fd01b88c | 4986 | sync_force_parallel_show(struct mddev *mddev, char *page) |
90b08710 BS |
4987 | { |
4988 | return sprintf(page, "%d\n", mddev->parallel_resync); | |
4989 | } | |
4990 | ||
4991 | static ssize_t | |
fd01b88c | 4992 | sync_force_parallel_store(struct mddev *mddev, const char *buf, size_t len) |
90b08710 BS |
4993 | { |
4994 | long n; | |
4995 | ||
b29bebd6 | 4996 | if (kstrtol(buf, 10, &n)) |
90b08710 BS |
4997 | return -EINVAL; |
4998 | ||
4999 | if (n != 0 && n != 1) | |
5000 | return -EINVAL; | |
5001 | ||
5002 | mddev->parallel_resync = n; | |
5003 | ||
5004 | if (mddev->sync_thread) | |
5005 | wake_up(&resync_wait); | |
5006 | ||
5007 | return len; | |
5008 | } | |
5009 | ||
5010 | /* force parallel resync, even with shared block devices */ | |
5011 | static struct md_sysfs_entry md_sync_force_parallel = | |
5012 | __ATTR(sync_force_parallel, S_IRUGO|S_IWUSR, | |
5013 | sync_force_parallel_show, sync_force_parallel_store); | |
5014 | ||
88202a0c | 5015 | static ssize_t |
fd01b88c | 5016 | sync_speed_show(struct mddev *mddev, char *page) |
88202a0c N |
5017 | { |
5018 | unsigned long resync, dt, db; | |
d1a7c503 N |
5019 | if (mddev->curr_resync == 0) |
5020 | return sprintf(page, "none\n"); | |
9687a60c AN |
5021 | resync = mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active); |
5022 | dt = (jiffies - mddev->resync_mark) / HZ; | |
88202a0c | 5023 | if (!dt) dt++; |
9687a60c AN |
5024 | db = resync - mddev->resync_mark_cnt; |
5025 | return sprintf(page, "%lu\n", db/dt/2); /* K/sec */ | |
88202a0c N |
5026 | } |
5027 | ||
80ca3a44 | 5028 | static struct md_sysfs_entry md_sync_speed = __ATTR_RO(sync_speed); |
88202a0c N |
5029 | |
5030 | static ssize_t | |
fd01b88c | 5031 | sync_completed_show(struct mddev *mddev, char *page) |
88202a0c | 5032 | { |
13ae864b | 5033 | unsigned long long max_sectors, resync; |
88202a0c | 5034 | |
acb180b0 N |
5035 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
5036 | return sprintf(page, "none\n"); | |
5037 | ||
72f36d59 N |
5038 | if (mddev->curr_resync == 1 || |
5039 | mddev->curr_resync == 2) | |
5040 | return sprintf(page, "delayed\n"); | |
5041 | ||
c804cdec N |
5042 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
5043 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
58c0fed4 | 5044 | max_sectors = mddev->resync_max_sectors; |
88202a0c | 5045 | else |
58c0fed4 | 5046 | max_sectors = mddev->dev_sectors; |
88202a0c | 5047 | |
acb180b0 | 5048 | resync = mddev->curr_resync_completed; |
13ae864b | 5049 | return sprintf(page, "%llu / %llu\n", resync, max_sectors); |
88202a0c N |
5050 | } |
5051 | ||
750f199e N |
5052 | static struct md_sysfs_entry md_sync_completed = |
5053 | __ATTR_PREALLOC(sync_completed, S_IRUGO, sync_completed_show, NULL); | |
88202a0c | 5054 | |
5e96ee65 | 5055 | static ssize_t |
fd01b88c | 5056 | min_sync_show(struct mddev *mddev, char *page) |
5e96ee65 NB |
5057 | { |
5058 | return sprintf(page, "%llu\n", | |
5059 | (unsigned long long)mddev->resync_min); | |
5060 | } | |
5061 | static ssize_t | |
fd01b88c | 5062 | min_sync_store(struct mddev *mddev, const char *buf, size_t len) |
5e96ee65 NB |
5063 | { |
5064 | unsigned long long min; | |
23da422b | 5065 | int err; |
23da422b | 5066 | |
b29bebd6 | 5067 | if (kstrtoull(buf, 10, &min)) |
5e96ee65 | 5068 | return -EINVAL; |
23da422b N |
5069 | |
5070 | spin_lock(&mddev->lock); | |
5071 | err = -EINVAL; | |
5e96ee65 | 5072 | if (min > mddev->resync_max) |
23da422b N |
5073 | goto out_unlock; |
5074 | ||
5075 | err = -EBUSY; | |
5e96ee65 | 5076 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 5077 | goto out_unlock; |
5e96ee65 | 5078 | |
50c37b13 N |
5079 | /* Round down to multiple of 4K for safety */ |
5080 | mddev->resync_min = round_down(min, 8); | |
23da422b | 5081 | err = 0; |
5e96ee65 | 5082 | |
23da422b N |
5083 | out_unlock: |
5084 | spin_unlock(&mddev->lock); | |
5085 | return err ?: len; | |
5e96ee65 NB |
5086 | } |
5087 | ||
5088 | static struct md_sysfs_entry md_min_sync = | |
5089 | __ATTR(sync_min, S_IRUGO|S_IWUSR, min_sync_show, min_sync_store); | |
5090 | ||
c6207277 | 5091 | static ssize_t |
fd01b88c | 5092 | max_sync_show(struct mddev *mddev, char *page) |
c6207277 N |
5093 | { |
5094 | if (mddev->resync_max == MaxSector) | |
5095 | return sprintf(page, "max\n"); | |
5096 | else | |
5097 | return sprintf(page, "%llu\n", | |
5098 | (unsigned long long)mddev->resync_max); | |
5099 | } | |
5100 | static ssize_t | |
fd01b88c | 5101 | max_sync_store(struct mddev *mddev, const char *buf, size_t len) |
c6207277 | 5102 | { |
23da422b N |
5103 | int err; |
5104 | spin_lock(&mddev->lock); | |
c6207277 N |
5105 | if (strncmp(buf, "max", 3) == 0) |
5106 | mddev->resync_max = MaxSector; | |
5107 | else { | |
5e96ee65 | 5108 | unsigned long long max; |
23da422b N |
5109 | int chunk; |
5110 | ||
5111 | err = -EINVAL; | |
b29bebd6 | 5112 | if (kstrtoull(buf, 10, &max)) |
23da422b | 5113 | goto out_unlock; |
5e96ee65 | 5114 | if (max < mddev->resync_min) |
23da422b N |
5115 | goto out_unlock; |
5116 | ||
5117 | err = -EBUSY; | |
c6207277 | 5118 | if (max < mddev->resync_max && |
4d484a4a | 5119 | mddev->ro == 0 && |
c6207277 | 5120 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 5121 | goto out_unlock; |
c6207277 N |
5122 | |
5123 | /* Must be a multiple of chunk_size */ | |
23da422b N |
5124 | chunk = mddev->chunk_sectors; |
5125 | if (chunk) { | |
2ac06c33 | 5126 | sector_t temp = max; |
23da422b N |
5127 | |
5128 | err = -EINVAL; | |
5129 | if (sector_div(temp, chunk)) | |
5130 | goto out_unlock; | |
c6207277 N |
5131 | } |
5132 | mddev->resync_max = max; | |
5133 | } | |
5134 | wake_up(&mddev->recovery_wait); | |
23da422b N |
5135 | err = 0; |
5136 | out_unlock: | |
5137 | spin_unlock(&mddev->lock); | |
5138 | return err ?: len; | |
c6207277 N |
5139 | } |
5140 | ||
5141 | static struct md_sysfs_entry md_max_sync = | |
5142 | __ATTR(sync_max, S_IRUGO|S_IWUSR, max_sync_show, max_sync_store); | |
5143 | ||
e464eafd | 5144 | static ssize_t |
fd01b88c | 5145 | suspend_lo_show(struct mddev *mddev, char *page) |
e464eafd N |
5146 | { |
5147 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_lo); | |
5148 | } | |
5149 | ||
5150 | static ssize_t | |
fd01b88c | 5151 | suspend_lo_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5152 | { |
b03e0ccb | 5153 | unsigned long long new; |
6791875e | 5154 | int err; |
e464eafd | 5155 | |
4c9309c0 AD |
5156 | err = kstrtoull(buf, 10, &new); |
5157 | if (err < 0) | |
5158 | return err; | |
5159 | if (new != (sector_t)new) | |
e464eafd | 5160 | return -EINVAL; |
23ddff37 | 5161 | |
6791875e N |
5162 | err = mddev_lock(mddev); |
5163 | if (err) | |
5164 | return err; | |
5165 | err = -EINVAL; | |
5166 | if (mddev->pers == NULL || | |
5167 | mddev->pers->quiesce == NULL) | |
5168 | goto unlock; | |
b03e0ccb | 5169 | mddev_suspend(mddev); |
23ddff37 | 5170 | mddev->suspend_lo = new; |
b03e0ccb N |
5171 | mddev_resume(mddev); |
5172 | ||
6791875e N |
5173 | err = 0; |
5174 | unlock: | |
5175 | mddev_unlock(mddev); | |
5176 | return err ?: len; | |
e464eafd N |
5177 | } |
5178 | static struct md_sysfs_entry md_suspend_lo = | |
5179 | __ATTR(suspend_lo, S_IRUGO|S_IWUSR, suspend_lo_show, suspend_lo_store); | |
5180 | ||
e464eafd | 5181 | static ssize_t |
fd01b88c | 5182 | suspend_hi_show(struct mddev *mddev, char *page) |
e464eafd N |
5183 | { |
5184 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_hi); | |
5185 | } | |
5186 | ||
5187 | static ssize_t | |
fd01b88c | 5188 | suspend_hi_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5189 | { |
b03e0ccb | 5190 | unsigned long long new; |
6791875e | 5191 | int err; |
e464eafd | 5192 | |
4c9309c0 AD |
5193 | err = kstrtoull(buf, 10, &new); |
5194 | if (err < 0) | |
5195 | return err; | |
5196 | if (new != (sector_t)new) | |
e464eafd | 5197 | return -EINVAL; |
23ddff37 | 5198 | |
6791875e N |
5199 | err = mddev_lock(mddev); |
5200 | if (err) | |
5201 | return err; | |
5202 | err = -EINVAL; | |
b03e0ccb | 5203 | if (mddev->pers == NULL) |
6791875e | 5204 | goto unlock; |
b03e0ccb N |
5205 | |
5206 | mddev_suspend(mddev); | |
23ddff37 | 5207 | mddev->suspend_hi = new; |
b03e0ccb N |
5208 | mddev_resume(mddev); |
5209 | ||
6791875e N |
5210 | err = 0; |
5211 | unlock: | |
5212 | mddev_unlock(mddev); | |
5213 | return err ?: len; | |
e464eafd N |
5214 | } |
5215 | static struct md_sysfs_entry md_suspend_hi = | |
5216 | __ATTR(suspend_hi, S_IRUGO|S_IWUSR, suspend_hi_show, suspend_hi_store); | |
5217 | ||
08a02ecd | 5218 | static ssize_t |
fd01b88c | 5219 | reshape_position_show(struct mddev *mddev, char *page) |
08a02ecd N |
5220 | { |
5221 | if (mddev->reshape_position != MaxSector) | |
5222 | return sprintf(page, "%llu\n", | |
5223 | (unsigned long long)mddev->reshape_position); | |
5224 | strcpy(page, "none\n"); | |
5225 | return 5; | |
5226 | } | |
5227 | ||
5228 | static ssize_t | |
fd01b88c | 5229 | reshape_position_store(struct mddev *mddev, const char *buf, size_t len) |
08a02ecd | 5230 | { |
c6563a8c | 5231 | struct md_rdev *rdev; |
4c9309c0 | 5232 | unsigned long long new; |
6791875e | 5233 | int err; |
6791875e | 5234 | |
4c9309c0 AD |
5235 | err = kstrtoull(buf, 10, &new); |
5236 | if (err < 0) | |
5237 | return err; | |
5238 | if (new != (sector_t)new) | |
08a02ecd | 5239 | return -EINVAL; |
6791875e N |
5240 | err = mddev_lock(mddev); |
5241 | if (err) | |
5242 | return err; | |
5243 | err = -EBUSY; | |
5244 | if (mddev->pers) | |
5245 | goto unlock; | |
08a02ecd N |
5246 | mddev->reshape_position = new; |
5247 | mddev->delta_disks = 0; | |
2c810cdd | 5248 | mddev->reshape_backwards = 0; |
08a02ecd N |
5249 | mddev->new_level = mddev->level; |
5250 | mddev->new_layout = mddev->layout; | |
664e7c41 | 5251 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
c6563a8c N |
5252 | rdev_for_each(rdev, mddev) |
5253 | rdev->new_data_offset = rdev->data_offset; | |
6791875e N |
5254 | err = 0; |
5255 | unlock: | |
5256 | mddev_unlock(mddev); | |
5257 | return err ?: len; | |
08a02ecd N |
5258 | } |
5259 | ||
5260 | static struct md_sysfs_entry md_reshape_position = | |
5261 | __ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show, | |
5262 | reshape_position_store); | |
5263 | ||
2c810cdd N |
5264 | static ssize_t |
5265 | reshape_direction_show(struct mddev *mddev, char *page) | |
5266 | { | |
5267 | return sprintf(page, "%s\n", | |
5268 | mddev->reshape_backwards ? "backwards" : "forwards"); | |
5269 | } | |
5270 | ||
5271 | static ssize_t | |
5272 | reshape_direction_store(struct mddev *mddev, const char *buf, size_t len) | |
5273 | { | |
5274 | int backwards = 0; | |
6791875e N |
5275 | int err; |
5276 | ||
2c810cdd N |
5277 | if (cmd_match(buf, "forwards")) |
5278 | backwards = 0; | |
5279 | else if (cmd_match(buf, "backwards")) | |
5280 | backwards = 1; | |
5281 | else | |
5282 | return -EINVAL; | |
5283 | if (mddev->reshape_backwards == backwards) | |
5284 | return len; | |
5285 | ||
6791875e N |
5286 | err = mddev_lock(mddev); |
5287 | if (err) | |
5288 | return err; | |
2c810cdd N |
5289 | /* check if we are allowed to change */ |
5290 | if (mddev->delta_disks) | |
6791875e N |
5291 | err = -EBUSY; |
5292 | else if (mddev->persistent && | |
2c810cdd | 5293 | mddev->major_version == 0) |
6791875e N |
5294 | err = -EINVAL; |
5295 | else | |
5296 | mddev->reshape_backwards = backwards; | |
5297 | mddev_unlock(mddev); | |
5298 | return err ?: len; | |
2c810cdd N |
5299 | } |
5300 | ||
5301 | static struct md_sysfs_entry md_reshape_direction = | |
5302 | __ATTR(reshape_direction, S_IRUGO|S_IWUSR, reshape_direction_show, | |
5303 | reshape_direction_store); | |
5304 | ||
b522adcd | 5305 | static ssize_t |
fd01b88c | 5306 | array_size_show(struct mddev *mddev, char *page) |
b522adcd DW |
5307 | { |
5308 | if (mddev->external_size) | |
5309 | return sprintf(page, "%llu\n", | |
5310 | (unsigned long long)mddev->array_sectors/2); | |
5311 | else | |
5312 | return sprintf(page, "default\n"); | |
5313 | } | |
5314 | ||
5315 | static ssize_t | |
fd01b88c | 5316 | array_size_store(struct mddev *mddev, const char *buf, size_t len) |
b522adcd DW |
5317 | { |
5318 | sector_t sectors; | |
6791875e N |
5319 | int err; |
5320 | ||
5321 | err = mddev_lock(mddev); | |
5322 | if (err) | |
5323 | return err; | |
b522adcd | 5324 | |
ab5a98b1 | 5325 | /* cluster raid doesn't support change array_sectors */ |
b670883b ZL |
5326 | if (mddev_is_clustered(mddev)) { |
5327 | mddev_unlock(mddev); | |
ab5a98b1 | 5328 | return -EINVAL; |
b670883b | 5329 | } |
ab5a98b1 | 5330 | |
b522adcd DW |
5331 | if (strncmp(buf, "default", 7) == 0) { |
5332 | if (mddev->pers) | |
5333 | sectors = mddev->pers->size(mddev, 0, 0); | |
5334 | else | |
5335 | sectors = mddev->array_sectors; | |
5336 | ||
5337 | mddev->external_size = 0; | |
5338 | } else { | |
5339 | if (strict_blocks_to_sectors(buf, §ors) < 0) | |
6791875e N |
5340 | err = -EINVAL; |
5341 | else if (mddev->pers && mddev->pers->size(mddev, 0, 0) < sectors) | |
5342 | err = -E2BIG; | |
5343 | else | |
5344 | mddev->external_size = 1; | |
b522adcd DW |
5345 | } |
5346 | ||
6791875e N |
5347 | if (!err) { |
5348 | mddev->array_sectors = sectors; | |
2c247c51 CH |
5349 | if (mddev->pers) |
5350 | set_capacity_and_notify(mddev->gendisk, | |
5351 | mddev->array_sectors); | |
cbe6ef1d | 5352 | } |
6791875e N |
5353 | mddev_unlock(mddev); |
5354 | return err ?: len; | |
b522adcd DW |
5355 | } |
5356 | ||
5357 | static struct md_sysfs_entry md_array_size = | |
5358 | __ATTR(array_size, S_IRUGO|S_IWUSR, array_size_show, | |
5359 | array_size_store); | |
e464eafd | 5360 | |
664aed04 AP |
5361 | static ssize_t |
5362 | consistency_policy_show(struct mddev *mddev, char *page) | |
5363 | { | |
5364 | int ret; | |
5365 | ||
5366 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) { | |
5367 | ret = sprintf(page, "journal\n"); | |
5368 | } else if (test_bit(MD_HAS_PPL, &mddev->flags)) { | |
5369 | ret = sprintf(page, "ppl\n"); | |
5370 | } else if (mddev->bitmap) { | |
5371 | ret = sprintf(page, "bitmap\n"); | |
5372 | } else if (mddev->pers) { | |
5373 | if (mddev->pers->sync_request) | |
5374 | ret = sprintf(page, "resync\n"); | |
5375 | else | |
5376 | ret = sprintf(page, "none\n"); | |
5377 | } else { | |
5378 | ret = sprintf(page, "unknown\n"); | |
5379 | } | |
5380 | ||
5381 | return ret; | |
5382 | } | |
5383 | ||
5384 | static ssize_t | |
5385 | consistency_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5386 | { | |
ba903a3e AP |
5387 | int err = 0; |
5388 | ||
664aed04 | 5389 | if (mddev->pers) { |
ba903a3e AP |
5390 | if (mddev->pers->change_consistency_policy) |
5391 | err = mddev->pers->change_consistency_policy(mddev, buf); | |
5392 | else | |
5393 | err = -EBUSY; | |
664aed04 AP |
5394 | } else if (mddev->external && strncmp(buf, "ppl", 3) == 0) { |
5395 | set_bit(MD_HAS_PPL, &mddev->flags); | |
664aed04 | 5396 | } else { |
ba903a3e | 5397 | err = -EINVAL; |
664aed04 | 5398 | } |
ba903a3e AP |
5399 | |
5400 | return err ? err : len; | |
664aed04 AP |
5401 | } |
5402 | ||
5403 | static struct md_sysfs_entry md_consistency_policy = | |
5404 | __ATTR(consistency_policy, S_IRUGO | S_IWUSR, consistency_policy_show, | |
5405 | consistency_policy_store); | |
5406 | ||
9a567843 GJ |
5407 | static ssize_t fail_last_dev_show(struct mddev *mddev, char *page) |
5408 | { | |
5409 | return sprintf(page, "%d\n", mddev->fail_last_dev); | |
5410 | } | |
5411 | ||
5412 | /* | |
5413 | * Setting fail_last_dev to true to allow last device to be forcibly removed | |
5414 | * from RAID1/RAID10. | |
5415 | */ | |
5416 | static ssize_t | |
5417 | fail_last_dev_store(struct mddev *mddev, const char *buf, size_t len) | |
5418 | { | |
5419 | int ret; | |
5420 | bool value; | |
5421 | ||
5422 | ret = kstrtobool(buf, &value); | |
5423 | if (ret) | |
5424 | return ret; | |
5425 | ||
5426 | if (value != mddev->fail_last_dev) | |
5427 | mddev->fail_last_dev = value; | |
5428 | ||
5429 | return len; | |
5430 | } | |
5431 | static struct md_sysfs_entry md_fail_last_dev = | |
5432 | __ATTR(fail_last_dev, S_IRUGO | S_IWUSR, fail_last_dev_show, | |
5433 | fail_last_dev_store); | |
5434 | ||
3938f5fb GJ |
5435 | static ssize_t serialize_policy_show(struct mddev *mddev, char *page) |
5436 | { | |
5437 | if (mddev->pers == NULL || (mddev->pers->level != 1)) | |
5438 | return sprintf(page, "n/a\n"); | |
5439 | else | |
5440 | return sprintf(page, "%d\n", mddev->serialize_policy); | |
5441 | } | |
5442 | ||
5443 | /* | |
5444 | * Setting serialize_policy to true to enforce write IO is not reordered | |
5445 | * for raid1. | |
5446 | */ | |
5447 | static ssize_t | |
5448 | serialize_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5449 | { | |
5450 | int err; | |
5451 | bool value; | |
5452 | ||
5453 | err = kstrtobool(buf, &value); | |
5454 | if (err) | |
5455 | return err; | |
5456 | ||
5457 | if (value == mddev->serialize_policy) | |
5458 | return len; | |
5459 | ||
5460 | err = mddev_lock(mddev); | |
5461 | if (err) | |
5462 | return err; | |
5463 | if (mddev->pers == NULL || (mddev->pers->level != 1)) { | |
5464 | pr_err("md: serialize_policy is only effective for raid1\n"); | |
5465 | err = -EINVAL; | |
5466 | goto unlock; | |
5467 | } | |
5468 | ||
5469 | mddev_suspend(mddev); | |
5470 | if (value) | |
5471 | mddev_create_serial_pool(mddev, NULL, true); | |
5472 | else | |
5473 | mddev_destroy_serial_pool(mddev, NULL, true); | |
5474 | mddev->serialize_policy = value; | |
5475 | mddev_resume(mddev); | |
5476 | unlock: | |
5477 | mddev_unlock(mddev); | |
5478 | return err ?: len; | |
5479 | } | |
5480 | ||
5481 | static struct md_sysfs_entry md_serialize_policy = | |
5482 | __ATTR(serialize_policy, S_IRUGO | S_IWUSR, serialize_policy_show, | |
5483 | serialize_policy_store); | |
5484 | ||
5485 | ||
eae1701f N |
5486 | static struct attribute *md_default_attrs[] = { |
5487 | &md_level.attr, | |
d4dbd025 | 5488 | &md_layout.attr, |
eae1701f | 5489 | &md_raid_disks.attr, |
ec164d07 | 5490 | &md_uuid.attr, |
3b34380a | 5491 | &md_chunk_size.attr, |
a35b0d69 | 5492 | &md_size.attr, |
a94213b1 | 5493 | &md_resync_start.attr, |
8bb93aac | 5494 | &md_metadata.attr, |
6d7ff738 | 5495 | &md_new_device.attr, |
16f17b39 | 5496 | &md_safe_delay.attr, |
9e653b63 | 5497 | &md_array_state.attr, |
08a02ecd | 5498 | &md_reshape_position.attr, |
2c810cdd | 5499 | &md_reshape_direction.attr, |
b522adcd | 5500 | &md_array_size.attr, |
1e50915f | 5501 | &max_corr_read_errors.attr, |
664aed04 | 5502 | &md_consistency_policy.attr, |
9a567843 | 5503 | &md_fail_last_dev.attr, |
3938f5fb | 5504 | &md_serialize_policy.attr, |
411036fa N |
5505 | NULL, |
5506 | }; | |
5507 | ||
5508 | static struct attribute *md_redundancy_attrs[] = { | |
24dd469d | 5509 | &md_scan_mode.attr, |
c4a39551 | 5510 | &md_last_scan_mode.attr, |
9d88883e | 5511 | &md_mismatches.attr, |
88202a0c N |
5512 | &md_sync_min.attr, |
5513 | &md_sync_max.attr, | |
5514 | &md_sync_speed.attr, | |
90b08710 | 5515 | &md_sync_force_parallel.attr, |
88202a0c | 5516 | &md_sync_completed.attr, |
5e96ee65 | 5517 | &md_min_sync.attr, |
c6207277 | 5518 | &md_max_sync.attr, |
e464eafd N |
5519 | &md_suspend_lo.attr, |
5520 | &md_suspend_hi.attr, | |
9b1d1dac | 5521 | &md_bitmap.attr, |
d7f3d291 | 5522 | &md_degraded.attr, |
eae1701f N |
5523 | NULL, |
5524 | }; | |
411036fa N |
5525 | static struct attribute_group md_redundancy_group = { |
5526 | .name = NULL, | |
5527 | .attrs = md_redundancy_attrs, | |
5528 | }; | |
5529 | ||
eae1701f N |
5530 | static ssize_t |
5531 | md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
5532 | { | |
5533 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5534 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5535 | ssize_t rv; |
eae1701f N |
5536 | |
5537 | if (!entry->show) | |
5538 | return -EIO; | |
af8a2434 N |
5539 | spin_lock(&all_mddevs_lock); |
5540 | if (list_empty(&mddev->all_mddevs)) { | |
5541 | spin_unlock(&all_mddevs_lock); | |
5542 | return -EBUSY; | |
5543 | } | |
5544 | mddev_get(mddev); | |
5545 | spin_unlock(&all_mddevs_lock); | |
5546 | ||
b7b17c9b | 5547 | rv = entry->show(mddev, page); |
af8a2434 | 5548 | mddev_put(mddev); |
96de1e66 | 5549 | return rv; |
eae1701f N |
5550 | } |
5551 | ||
5552 | static ssize_t | |
5553 | md_attr_store(struct kobject *kobj, struct attribute *attr, | |
5554 | const char *page, size_t length) | |
5555 | { | |
5556 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5557 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5558 | ssize_t rv; |
eae1701f N |
5559 | |
5560 | if (!entry->store) | |
5561 | return -EIO; | |
67463acb N |
5562 | if (!capable(CAP_SYS_ADMIN)) |
5563 | return -EACCES; | |
af8a2434 N |
5564 | spin_lock(&all_mddevs_lock); |
5565 | if (list_empty(&mddev->all_mddevs)) { | |
5566 | spin_unlock(&all_mddevs_lock); | |
5567 | return -EBUSY; | |
5568 | } | |
5569 | mddev_get(mddev); | |
5570 | spin_unlock(&all_mddevs_lock); | |
6791875e | 5571 | rv = entry->store(mddev, page, length); |
af8a2434 | 5572 | mddev_put(mddev); |
96de1e66 | 5573 | return rv; |
eae1701f N |
5574 | } |
5575 | ||
5576 | static void md_free(struct kobject *ko) | |
5577 | { | |
fd01b88c | 5578 | struct mddev *mddev = container_of(ko, struct mddev, kobj); |
a21d1504 N |
5579 | |
5580 | if (mddev->sysfs_state) | |
5581 | sysfs_put(mddev->sysfs_state); | |
e1a86dbb JB |
5582 | if (mddev->sysfs_level) |
5583 | sysfs_put(mddev->sysfs_level); | |
5584 | ||
d8115c35 BVA |
5585 | if (mddev->gendisk) |
5586 | del_gendisk(mddev->gendisk); | |
6cd18e71 N |
5587 | if (mddev->queue) |
5588 | blk_cleanup_queue(mddev->queue); | |
d8115c35 | 5589 | if (mddev->gendisk) |
a21d1504 | 5590 | put_disk(mddev->gendisk); |
4ad23a97 | 5591 | percpu_ref_exit(&mddev->writes_pending); |
a21d1504 | 5592 | |
28dec870 KO |
5593 | bioset_exit(&mddev->bio_set); |
5594 | bioset_exit(&mddev->sync_set); | |
41d2d848 | 5595 | mempool_exit(&mddev->md_io_pool); |
eae1701f N |
5596 | kfree(mddev); |
5597 | } | |
5598 | ||
52cf25d0 | 5599 | static const struct sysfs_ops md_sysfs_ops = { |
eae1701f N |
5600 | .show = md_attr_show, |
5601 | .store = md_attr_store, | |
5602 | }; | |
5603 | static struct kobj_type md_ktype = { | |
5604 | .release = md_free, | |
5605 | .sysfs_ops = &md_sysfs_ops, | |
5606 | .default_attrs = md_default_attrs, | |
5607 | }; | |
5608 | ||
1da177e4 LT |
5609 | int mdp_major = 0; |
5610 | ||
5fd3a17e DW |
5611 | static void mddev_delayed_delete(struct work_struct *ws) |
5612 | { | |
fd01b88c | 5613 | struct mddev *mddev = container_of(ws, struct mddev, del_work); |
5fd3a17e | 5614 | |
43a70507 | 5615 | sysfs_remove_group(&mddev->kobj, &md_bitmap_group); |
5fd3a17e DW |
5616 | kobject_del(&mddev->kobj); |
5617 | kobject_put(&mddev->kobj); | |
5618 | } | |
5619 | ||
4ad23a97 N |
5620 | static void no_op(struct percpu_ref *r) {} |
5621 | ||
a415c0f1 N |
5622 | int mddev_init_writes_pending(struct mddev *mddev) |
5623 | { | |
5624 | if (mddev->writes_pending.percpu_count_ptr) | |
5625 | return 0; | |
ddde2af7 RG |
5626 | if (percpu_ref_init(&mddev->writes_pending, no_op, |
5627 | PERCPU_REF_ALLOW_REINIT, GFP_KERNEL) < 0) | |
a415c0f1 N |
5628 | return -ENOMEM; |
5629 | /* We want to start with the refcount at zero */ | |
5630 | percpu_ref_put(&mddev->writes_pending); | |
5631 | return 0; | |
5632 | } | |
5633 | EXPORT_SYMBOL_GPL(mddev_init_writes_pending); | |
5634 | ||
efeb53c0 | 5635 | static int md_alloc(dev_t dev, char *name) |
1da177e4 | 5636 | { |
039b7225 N |
5637 | /* |
5638 | * If dev is zero, name is the name of a device to allocate with | |
5639 | * an arbitrary minor number. It will be "md_???" | |
5640 | * If dev is non-zero it must be a device number with a MAJOR of | |
5641 | * MD_MAJOR or mdp_major. In this case, if "name" is NULL, then | |
5642 | * the device is being created by opening a node in /dev. | |
5643 | * If "name" is not NULL, the device is being created by | |
5644 | * writing to /sys/module/md_mod/parameters/new_array. | |
5645 | */ | |
48c9c27b | 5646 | static DEFINE_MUTEX(disks_mutex); |
fd01b88c | 5647 | struct mddev *mddev = mddev_find(dev); |
1da177e4 | 5648 | struct gendisk *disk; |
efeb53c0 N |
5649 | int partitioned; |
5650 | int shift; | |
5651 | int unit; | |
3830c62f | 5652 | int error; |
1da177e4 LT |
5653 | |
5654 | if (!mddev) | |
efeb53c0 N |
5655 | return -ENODEV; |
5656 | ||
5657 | partitioned = (MAJOR(mddev->unit) != MD_MAJOR); | |
5658 | shift = partitioned ? MdpMinorShift : 0; | |
5659 | unit = MINOR(mddev->unit) >> shift; | |
1da177e4 | 5660 | |
e804ac78 TH |
5661 | /* wait for any previous instance of this device to be |
5662 | * completely removed (mddev_delayed_delete). | |
d3374825 | 5663 | */ |
e804ac78 | 5664 | flush_workqueue(md_misc_wq); |
d3374825 | 5665 | |
48c9c27b | 5666 | mutex_lock(&disks_mutex); |
0909dc44 N |
5667 | error = -EEXIST; |
5668 | if (mddev->gendisk) | |
5669 | goto abort; | |
efeb53c0 | 5670 | |
039b7225 | 5671 | if (name && !dev) { |
efeb53c0 N |
5672 | /* Need to ensure that 'name' is not a duplicate. |
5673 | */ | |
fd01b88c | 5674 | struct mddev *mddev2; |
efeb53c0 N |
5675 | spin_lock(&all_mddevs_lock); |
5676 | ||
5677 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) | |
5678 | if (mddev2->gendisk && | |
5679 | strcmp(mddev2->gendisk->disk_name, name) == 0) { | |
5680 | spin_unlock(&all_mddevs_lock); | |
0909dc44 | 5681 | goto abort; |
efeb53c0 N |
5682 | } |
5683 | spin_unlock(&all_mddevs_lock); | |
1da177e4 | 5684 | } |
039b7225 N |
5685 | if (name && dev) |
5686 | /* | |
5687 | * Creating /dev/mdNNN via "newarray", so adjust hold_active. | |
5688 | */ | |
5689 | mddev->hold_active = UNTIL_STOP; | |
8b765398 | 5690 | |
41d2d848 AP |
5691 | error = mempool_init_kmalloc_pool(&mddev->md_io_pool, BIO_POOL_SIZE, |
5692 | sizeof(struct md_io)); | |
5693 | if (error) | |
5694 | goto abort; | |
5695 | ||
0909dc44 | 5696 | error = -ENOMEM; |
c62b37d9 | 5697 | mddev->queue = blk_alloc_queue(NUMA_NO_NODE); |
0909dc44 N |
5698 | if (!mddev->queue) |
5699 | goto abort; | |
409c57f3 | 5700 | |
b1bd055d | 5701 | blk_set_stacking_limits(&mddev->queue->limits); |
8b765398 | 5702 | |
1da177e4 LT |
5703 | disk = alloc_disk(1 << shift); |
5704 | if (!disk) { | |
8b765398 N |
5705 | blk_cleanup_queue(mddev->queue); |
5706 | mddev->queue = NULL; | |
0909dc44 | 5707 | goto abort; |
1da177e4 | 5708 | } |
efeb53c0 | 5709 | disk->major = MAJOR(mddev->unit); |
1da177e4 | 5710 | disk->first_minor = unit << shift; |
efeb53c0 N |
5711 | if (name) |
5712 | strcpy(disk->disk_name, name); | |
5713 | else if (partitioned) | |
1da177e4 | 5714 | sprintf(disk->disk_name, "md_d%d", unit); |
ce7b0f46 | 5715 | else |
1da177e4 | 5716 | sprintf(disk->disk_name, "md%d", unit); |
1da177e4 LT |
5717 | disk->fops = &md_fops; |
5718 | disk->private_data = mddev; | |
5719 | disk->queue = mddev->queue; | |
56883a7e | 5720 | blk_queue_write_cache(mddev->queue, true, true); |
92850bbd | 5721 | /* Allow extended partitions. This makes the |
d3374825 | 5722 | * 'mdp' device redundant, but we can't really |
92850bbd N |
5723 | * remove it now. |
5724 | */ | |
5725 | disk->flags |= GENHD_FL_EXT_DEVT; | |
a564e23f | 5726 | disk->events |= DISK_EVENT_MEDIA_CHANGE; |
1da177e4 | 5727 | mddev->gendisk = disk; |
b0140891 N |
5728 | /* As soon as we call add_disk(), another thread could get |
5729 | * through to md_open, so make sure it doesn't get too far | |
5730 | */ | |
5731 | mutex_lock(&mddev->open_mutex); | |
5732 | add_disk(disk); | |
5733 | ||
28dec870 | 5734 | error = kobject_add(&mddev->kobj, &disk_to_dev(disk)->kobj, "%s", "md"); |
0909dc44 N |
5735 | if (error) { |
5736 | /* This isn't possible, but as kobject_init_and_add is marked | |
5737 | * __must_check, we must do something with the result | |
5738 | */ | |
9d48739e N |
5739 | pr_debug("md: cannot register %s/md - name in use\n", |
5740 | disk->disk_name); | |
0909dc44 N |
5741 | error = 0; |
5742 | } | |
00bcb4ac N |
5743 | if (mddev->kobj.sd && |
5744 | sysfs_create_group(&mddev->kobj, &md_bitmap_group)) | |
9d48739e | 5745 | pr_debug("pointless warning\n"); |
b0140891 | 5746 | mutex_unlock(&mddev->open_mutex); |
0909dc44 N |
5747 | abort: |
5748 | mutex_unlock(&disks_mutex); | |
00bcb4ac | 5749 | if (!error && mddev->kobj.sd) { |
3830c62f | 5750 | kobject_uevent(&mddev->kobj, KOBJ_ADD); |
00bcb4ac | 5751 | mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state"); |
e1a86dbb | 5752 | mddev->sysfs_level = sysfs_get_dirent_safe(mddev->kobj.sd, "level"); |
b62b7590 | 5753 | } |
d3374825 | 5754 | mddev_put(mddev); |
0909dc44 | 5755 | return error; |
efeb53c0 N |
5756 | } |
5757 | ||
28144f99 | 5758 | static void md_probe(dev_t dev) |
efeb53c0 | 5759 | { |
28144f99 CH |
5760 | if (MAJOR(dev) == MD_MAJOR && MINOR(dev) >= 512) |
5761 | return; | |
78b6350d N |
5762 | if (create_on_open) |
5763 | md_alloc(dev, NULL); | |
1da177e4 LT |
5764 | } |
5765 | ||
e4dca7b7 | 5766 | static int add_named_array(const char *val, const struct kernel_param *kp) |
efeb53c0 | 5767 | { |
039b7225 N |
5768 | /* |
5769 | * val must be "md_*" or "mdNNN". | |
5770 | * For "md_*" we allocate an array with a large free minor number, and | |
efeb53c0 | 5771 | * set the name to val. val must not already be an active name. |
039b7225 N |
5772 | * For "mdNNN" we allocate an array with the minor number NNN |
5773 | * which must not already be in use. | |
efeb53c0 N |
5774 | */ |
5775 | int len = strlen(val); | |
5776 | char buf[DISK_NAME_LEN]; | |
039b7225 | 5777 | unsigned long devnum; |
efeb53c0 N |
5778 | |
5779 | while (len && val[len-1] == '\n') | |
5780 | len--; | |
5781 | if (len >= DISK_NAME_LEN) | |
5782 | return -E2BIG; | |
5783 | strlcpy(buf, val, len+1); | |
039b7225 N |
5784 | if (strncmp(buf, "md_", 3) == 0) |
5785 | return md_alloc(0, buf); | |
5786 | if (strncmp(buf, "md", 2) == 0 && | |
5787 | isdigit(buf[2]) && | |
5788 | kstrtoul(buf+2, 10, &devnum) == 0 && | |
5789 | devnum <= MINORMASK) | |
5790 | return md_alloc(MKDEV(MD_MAJOR, devnum), NULL); | |
5791 | ||
5792 | return -EINVAL; | |
efeb53c0 N |
5793 | } |
5794 | ||
8376d3c1 | 5795 | static void md_safemode_timeout(struct timer_list *t) |
1da177e4 | 5796 | { |
8376d3c1 | 5797 | struct mddev *mddev = from_timer(mddev, t, safemode_timer); |
1da177e4 | 5798 | |
4ad23a97 N |
5799 | mddev->safemode = 1; |
5800 | if (mddev->external) | |
5801 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
5802 | ||
1da177e4 LT |
5803 | md_wakeup_thread(mddev->thread); |
5804 | } | |
5805 | ||
6ff8d8ec | 5806 | static int start_dirty_degraded; |
1da177e4 | 5807 | |
fd01b88c | 5808 | int md_run(struct mddev *mddev) |
1da177e4 | 5809 | { |
2604b703 | 5810 | int err; |
3cb03002 | 5811 | struct md_rdev *rdev; |
84fc4b56 | 5812 | struct md_personality *pers; |
1da177e4 | 5813 | |
a757e64c N |
5814 | if (list_empty(&mddev->disks)) |
5815 | /* cannot run an array with no devices.. */ | |
1da177e4 | 5816 | return -EINVAL; |
1da177e4 LT |
5817 | |
5818 | if (mddev->pers) | |
5819 | return -EBUSY; | |
bb4f1e9d N |
5820 | /* Cannot run until previous stop completes properly */ |
5821 | if (mddev->sysfs_active) | |
5822 | return -EBUSY; | |
b6eb127d | 5823 | |
1da177e4 LT |
5824 | /* |
5825 | * Analyze all RAID superblock(s) | |
5826 | */ | |
1ec4a939 N |
5827 | if (!mddev->raid_disks) { |
5828 | if (!mddev->persistent) | |
5829 | return -EINVAL; | |
6a5cb53a YY |
5830 | err = analyze_sbs(mddev); |
5831 | if (err) | |
5832 | return -EINVAL; | |
1ec4a939 | 5833 | } |
1da177e4 | 5834 | |
d9d166c2 N |
5835 | if (mddev->level != LEVEL_NONE) |
5836 | request_module("md-level-%d", mddev->level); | |
5837 | else if (mddev->clevel[0]) | |
5838 | request_module("md-%s", mddev->clevel); | |
1da177e4 LT |
5839 | |
5840 | /* | |
5841 | * Drop all container device buffers, from now on | |
5842 | * the only valid external interface is through the md | |
5843 | * device. | |
1da177e4 | 5844 | */ |
4b6c1060 | 5845 | mddev->has_superblocks = false; |
dafb20fa | 5846 | rdev_for_each(rdev, mddev) { |
b2d444d7 | 5847 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
5848 | continue; |
5849 | sync_blockdev(rdev->bdev); | |
f98393a6 | 5850 | invalidate_bdev(rdev->bdev); |
d7a47838 | 5851 | if (mddev->ro != 1 && rdev_read_only(rdev)) { |
97b20ef7 N |
5852 | mddev->ro = 1; |
5853 | if (mddev->gendisk) | |
5854 | set_disk_ro(mddev->gendisk, 1); | |
5855 | } | |
f0d76d70 | 5856 | |
4b6c1060 HM |
5857 | if (rdev->sb_page) |
5858 | mddev->has_superblocks = true; | |
5859 | ||
f0d76d70 N |
5860 | /* perform some consistency tests on the device. |
5861 | * We don't want the data to overlap the metadata, | |
58c0fed4 | 5862 | * Internal Bitmap issues have been handled elsewhere. |
f0d76d70 | 5863 | */ |
a6ff7e08 JB |
5864 | if (rdev->meta_bdev) { |
5865 | /* Nothing to check */; | |
5866 | } else if (rdev->data_offset < rdev->sb_start) { | |
58c0fed4 AN |
5867 | if (mddev->dev_sectors && |
5868 | rdev->data_offset + mddev->dev_sectors | |
0f420358 | 5869 | > rdev->sb_start) { |
9d48739e N |
5870 | pr_warn("md: %s: data overlaps metadata\n", |
5871 | mdname(mddev)); | |
f0d76d70 N |
5872 | return -EINVAL; |
5873 | } | |
5874 | } else { | |
0f420358 | 5875 | if (rdev->sb_start + rdev->sb_size/512 |
f0d76d70 | 5876 | > rdev->data_offset) { |
9d48739e N |
5877 | pr_warn("md: %s: metadata overlaps data\n", |
5878 | mdname(mddev)); | |
f0d76d70 N |
5879 | return -EINVAL; |
5880 | } | |
5881 | } | |
00bcb4ac | 5882 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
5883 | } |
5884 | ||
afeee514 KO |
5885 | if (!bioset_initialized(&mddev->bio_set)) { |
5886 | err = bioset_init(&mddev->bio_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5887 | if (err) | |
5888 | return err; | |
10273170 | 5889 | } |
afeee514 KO |
5890 | if (!bioset_initialized(&mddev->sync_set)) { |
5891 | err = bioset_init(&mddev->sync_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5892 | if (err) | |
28dec870 | 5893 | return err; |
5a85071c | 5894 | } |
a167f663 | 5895 | |
1da177e4 | 5896 | spin_lock(&pers_lock); |
d9d166c2 | 5897 | pers = find_pers(mddev->level, mddev->clevel); |
2604b703 | 5898 | if (!pers || !try_module_get(pers->owner)) { |
1da177e4 | 5899 | spin_unlock(&pers_lock); |
d9d166c2 | 5900 | if (mddev->level != LEVEL_NONE) |
9d48739e N |
5901 | pr_warn("md: personality for level %d is not loaded!\n", |
5902 | mddev->level); | |
d9d166c2 | 5903 | else |
9d48739e N |
5904 | pr_warn("md: personality for level %s is not loaded!\n", |
5905 | mddev->clevel); | |
bfc9dfdc SL |
5906 | err = -EINVAL; |
5907 | goto abort; | |
1da177e4 | 5908 | } |
1da177e4 | 5909 | spin_unlock(&pers_lock); |
34817e8c N |
5910 | if (mddev->level != pers->level) { |
5911 | mddev->level = pers->level; | |
5912 | mddev->new_level = pers->level; | |
5913 | } | |
d9d166c2 | 5914 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
1da177e4 | 5915 | |
f6705578 | 5916 | if (mddev->reshape_position != MaxSector && |
63c70c4f | 5917 | pers->start_reshape == NULL) { |
f6705578 | 5918 | /* This personality cannot handle reshaping... */ |
f6705578 | 5919 | module_put(pers->owner); |
bfc9dfdc SL |
5920 | err = -EINVAL; |
5921 | goto abort; | |
f6705578 N |
5922 | } |
5923 | ||
7dd5e7c3 N |
5924 | if (pers->sync_request) { |
5925 | /* Warn if this is a potentially silly | |
5926 | * configuration. | |
5927 | */ | |
5928 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 5929 | struct md_rdev *rdev2; |
7dd5e7c3 | 5930 | int warned = 0; |
159ec1fc | 5931 | |
dafb20fa N |
5932 | rdev_for_each(rdev, mddev) |
5933 | rdev_for_each(rdev2, mddev) { | |
7dd5e7c3 | 5934 | if (rdev < rdev2 && |
61a27e1f CH |
5935 | rdev->bdev->bd_disk == |
5936 | rdev2->bdev->bd_disk) { | |
9d48739e N |
5937 | pr_warn("%s: WARNING: %s appears to be on the same physical disk as %s.\n", |
5938 | mdname(mddev), | |
5939 | bdevname(rdev->bdev,b), | |
5940 | bdevname(rdev2->bdev,b2)); | |
7dd5e7c3 N |
5941 | warned = 1; |
5942 | } | |
5943 | } | |
159ec1fc | 5944 | |
7dd5e7c3 | 5945 | if (warned) |
9d48739e | 5946 | pr_warn("True protection against single-disk failure might be compromised.\n"); |
7dd5e7c3 N |
5947 | } |
5948 | ||
657390d2 | 5949 | mddev->recovery = 0; |
58c0fed4 AN |
5950 | /* may be over-ridden by personality */ |
5951 | mddev->resync_max_sectors = mddev->dev_sectors; | |
5952 | ||
6ff8d8ec | 5953 | mddev->ok_start_degraded = start_dirty_degraded; |
1da177e4 | 5954 | |
0f9552b5 | 5955 | if (start_readonly && mddev->ro == 0) |
f91de92e N |
5956 | mddev->ro = 2; /* read-only, but switch on first write */ |
5957 | ||
36d091f4 | 5958 | err = pers->run(mddev); |
13e53df3 | 5959 | if (err) |
9d48739e | 5960 | pr_warn("md: pers->run() failed ...\n"); |
36d091f4 | 5961 | else if (pers->size(mddev, 0, 0) < mddev->array_sectors) { |
9d48739e N |
5962 | WARN_ONCE(!mddev->external_size, |
5963 | "%s: default size too small, but 'external_size' not in effect?\n", | |
5964 | __func__); | |
5965 | pr_warn("md: invalid array_size %llu > default size %llu\n", | |
5966 | (unsigned long long)mddev->array_sectors / 2, | |
5967 | (unsigned long long)pers->size(mddev, 0, 0) / 2); | |
b522adcd | 5968 | err = -EINVAL; |
b522adcd | 5969 | } |
36d091f4 | 5970 | if (err == 0 && pers->sync_request && |
ef99bf48 | 5971 | (mddev->bitmap_info.file || mddev->bitmap_info.offset)) { |
f9209a32 GR |
5972 | struct bitmap *bitmap; |
5973 | ||
e64e4018 | 5974 | bitmap = md_bitmap_create(mddev, -1); |
f9209a32 GR |
5975 | if (IS_ERR(bitmap)) { |
5976 | err = PTR_ERR(bitmap); | |
9d48739e N |
5977 | pr_warn("%s: failed to create bitmap (%d)\n", |
5978 | mdname(mddev), err); | |
f9209a32 GR |
5979 | } else |
5980 | mddev->bitmap = bitmap; | |
5981 | ||
b15c2e57 | 5982 | } |
d494549a GJ |
5983 | if (err) |
5984 | goto bitmap_abort; | |
3e148a32 GJ |
5985 | |
5986 | if (mddev->bitmap_info.max_write_behind > 0) { | |
3e173ab5 | 5987 | bool create_pool = false; |
3e148a32 GJ |
5988 | |
5989 | rdev_for_each(rdev, mddev) { | |
5990 | if (test_bit(WriteMostly, &rdev->flags) && | |
404659cf | 5991 | rdev_init_serial(rdev)) |
3e173ab5 | 5992 | create_pool = true; |
3e148a32 | 5993 | } |
3e173ab5 | 5994 | if (create_pool && mddev->serial_info_pool == NULL) { |
404659cf GJ |
5995 | mddev->serial_info_pool = |
5996 | mempool_create_kmalloc_pool(NR_SERIAL_INFOS, | |
5997 | sizeof(struct serial_info)); | |
5998 | if (!mddev->serial_info_pool) { | |
3e148a32 | 5999 | err = -ENOMEM; |
d494549a | 6000 | goto bitmap_abort; |
3e148a32 GJ |
6001 | } |
6002 | } | |
6003 | } | |
6004 | ||
5c675f83 | 6005 | if (mddev->queue) { |
bb086a89 SL |
6006 | bool nonrot = true; |
6007 | ||
6008 | rdev_for_each(rdev, mddev) { | |
6009 | if (rdev->raid_disk >= 0 && | |
6010 | !blk_queue_nonrot(bdev_get_queue(rdev->bdev))) { | |
6011 | nonrot = false; | |
6012 | break; | |
6013 | } | |
6014 | } | |
6015 | if (mddev->degraded) | |
6016 | nonrot = false; | |
6017 | if (nonrot) | |
8b904b5b | 6018 | blk_queue_flag_set(QUEUE_FLAG_NONROT, mddev->queue); |
bb086a89 | 6019 | else |
8b904b5b | 6020 | blk_queue_flag_clear(QUEUE_FLAG_NONROT, mddev->queue); |
5c675f83 | 6021 | } |
36d091f4 | 6022 | if (pers->sync_request) { |
00bcb4ac N |
6023 | if (mddev->kobj.sd && |
6024 | sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
6025 | pr_warn("md: cannot register extra attributes for %s\n", |
6026 | mdname(mddev)); | |
00bcb4ac | 6027 | mddev->sysfs_action = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_action"); |
e8efa9b8 JB |
6028 | mddev->sysfs_completed = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_completed"); |
6029 | mddev->sysfs_degraded = sysfs_get_dirent_safe(mddev->kobj.sd, "degraded"); | |
5e55e2f5 | 6030 | } else if (mddev->ro == 2) /* auto-readonly not meaningful */ |
fd9d49ca N |
6031 | mddev->ro = 0; |
6032 | ||
1e50915f RB |
6033 | atomic_set(&mddev->max_corr_read_errors, |
6034 | MD_DEFAULT_MAX_CORRECTED_READ_ERRORS); | |
1da177e4 | 6035 | mddev->safemode = 0; |
28c1b9fd GR |
6036 | if (mddev_is_clustered(mddev)) |
6037 | mddev->safemode_delay = 0; | |
6038 | else | |
7c9d5c54 | 6039 | mddev->safemode_delay = DEFAULT_SAFEMODE_DELAY; |
1da177e4 | 6040 | mddev->in_sync = 1; |
0ca69886 | 6041 | smp_wmb(); |
36d091f4 N |
6042 | spin_lock(&mddev->lock); |
6043 | mddev->pers = pers; | |
36d091f4 | 6044 | spin_unlock(&mddev->lock); |
dafb20fa | 6045 | rdev_for_each(rdev, mddev) |
36fad858 | 6046 | if (rdev->raid_disk >= 0) |
e5b521ee | 6047 | sysfs_link_rdev(mddev, rdev); /* failure here is OK */ |
f72ffdd6 | 6048 | |
a4a3d26d N |
6049 | if (mddev->degraded && !mddev->ro) |
6050 | /* This ensures that recovering status is reported immediately | |
6051 | * via sysfs - until a lack of spares is confirmed. | |
6052 | */ | |
6053 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
1da177e4 | 6054 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f72ffdd6 | 6055 | |
2953079c | 6056 | if (mddev->sb_flags) |
850b2b42 | 6057 | md_update_sb(mddev, 0); |
1da177e4 | 6058 | |
d7603b7e | 6059 | md_new_event(mddev); |
1da177e4 | 6060 | return 0; |
b126194c | 6061 | |
d494549a GJ |
6062 | bitmap_abort: |
6063 | mddev_detach(mddev); | |
6064 | if (mddev->private) | |
6065 | pers->free(mddev, mddev->private); | |
6066 | mddev->private = NULL; | |
6067 | module_put(pers->owner); | |
6068 | md_bitmap_destroy(mddev); | |
b126194c | 6069 | abort: |
4bc034d3 N |
6070 | bioset_exit(&mddev->bio_set); |
6071 | bioset_exit(&mddev->sync_set); | |
b126194c | 6072 | return err; |
1da177e4 | 6073 | } |
390ee602 | 6074 | EXPORT_SYMBOL_GPL(md_run); |
1da177e4 | 6075 | |
7e0adbfc | 6076 | int do_md_run(struct mddev *mddev) |
fe60b014 N |
6077 | { |
6078 | int err; | |
6079 | ||
9d4b45d6 | 6080 | set_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
6081 | err = md_run(mddev); |
6082 | if (err) | |
6083 | goto out; | |
e64e4018 | 6084 | err = md_bitmap_load(mddev); |
69e51b44 | 6085 | if (err) { |
e64e4018 | 6086 | md_bitmap_destroy(mddev); |
69e51b44 N |
6087 | goto out; |
6088 | } | |
0fd018af | 6089 | |
28c1b9fd GR |
6090 | if (mddev_is_clustered(mddev)) |
6091 | md_allow_write(mddev); | |
6092 | ||
d5d885fd SL |
6093 | /* run start up tasks that require md_thread */ |
6094 | md_start(mddev); | |
6095 | ||
0fd018af JB |
6096 | md_wakeup_thread(mddev->thread); |
6097 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
6098 | ||
2c247c51 | 6099 | set_capacity_and_notify(mddev->gendisk, mddev->array_sectors); |
9d4b45d6 | 6100 | clear_bit(MD_NOT_READY, &mddev->flags); |
f0b4f7e2 | 6101 | mddev->changed = 1; |
fe60b014 | 6102 | kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); |
9d4b45d6 N |
6103 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6104 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
e1a86dbb | 6105 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
fe60b014 | 6106 | out: |
9d4b45d6 | 6107 | clear_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
6108 | return err; |
6109 | } | |
6110 | ||
d5d885fd SL |
6111 | int md_start(struct mddev *mddev) |
6112 | { | |
6113 | int ret = 0; | |
6114 | ||
6115 | if (mddev->pers->start) { | |
6116 | set_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
6117 | md_wakeup_thread(mddev->thread); | |
6118 | ret = mddev->pers->start(mddev); | |
6119 | clear_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
6120 | md_wakeup_thread(mddev->sync_thread); | |
6121 | } | |
6122 | return ret; | |
6123 | } | |
6124 | EXPORT_SYMBOL_GPL(md_start); | |
6125 | ||
fd01b88c | 6126 | static int restart_array(struct mddev *mddev) |
1da177e4 LT |
6127 | { |
6128 | struct gendisk *disk = mddev->gendisk; | |
97b20ef7 N |
6129 | struct md_rdev *rdev; |
6130 | bool has_journal = false; | |
6131 | bool has_readonly = false; | |
1da177e4 | 6132 | |
80fab1d7 | 6133 | /* Complain if it has no devices */ |
1da177e4 | 6134 | if (list_empty(&mddev->disks)) |
80fab1d7 AN |
6135 | return -ENXIO; |
6136 | if (!mddev->pers) | |
6137 | return -EINVAL; | |
6138 | if (!mddev->ro) | |
6139 | return -EBUSY; | |
339421de | 6140 | |
97b20ef7 N |
6141 | rcu_read_lock(); |
6142 | rdev_for_each_rcu(rdev, mddev) { | |
6143 | if (test_bit(Journal, &rdev->flags) && | |
6144 | !test_bit(Faulty, &rdev->flags)) | |
6145 | has_journal = true; | |
a42e0d70 | 6146 | if (rdev_read_only(rdev)) |
97b20ef7 N |
6147 | has_readonly = true; |
6148 | } | |
6149 | rcu_read_unlock(); | |
6150 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags) && !has_journal) | |
339421de | 6151 | /* Don't restart rw with journal missing/faulty */ |
339421de | 6152 | return -EINVAL; |
97b20ef7 N |
6153 | if (has_readonly) |
6154 | return -EROFS; | |
339421de | 6155 | |
80fab1d7 AN |
6156 | mddev->safemode = 0; |
6157 | mddev->ro = 0; | |
6158 | set_disk_ro(disk, 0); | |
9d48739e | 6159 | pr_debug("md: %s switched to read-write mode.\n", mdname(mddev)); |
80fab1d7 AN |
6160 | /* Kick recovery or resync if necessary */ |
6161 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6162 | md_wakeup_thread(mddev->thread); | |
6163 | md_wakeup_thread(mddev->sync_thread); | |
00bcb4ac | 6164 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
80fab1d7 | 6165 | return 0; |
1da177e4 LT |
6166 | } |
6167 | ||
fd01b88c | 6168 | static void md_clean(struct mddev *mddev) |
6177b472 N |
6169 | { |
6170 | mddev->array_sectors = 0; | |
6171 | mddev->external_size = 0; | |
6172 | mddev->dev_sectors = 0; | |
6173 | mddev->raid_disks = 0; | |
6174 | mddev->recovery_cp = 0; | |
6175 | mddev->resync_min = 0; | |
6176 | mddev->resync_max = MaxSector; | |
6177 | mddev->reshape_position = MaxSector; | |
6178 | mddev->external = 0; | |
6179 | mddev->persistent = 0; | |
6180 | mddev->level = LEVEL_NONE; | |
6181 | mddev->clevel[0] = 0; | |
6182 | mddev->flags = 0; | |
2953079c | 6183 | mddev->sb_flags = 0; |
6177b472 N |
6184 | mddev->ro = 0; |
6185 | mddev->metadata_type[0] = 0; | |
6186 | mddev->chunk_sectors = 0; | |
6187 | mddev->ctime = mddev->utime = 0; | |
6188 | mddev->layout = 0; | |
6189 | mddev->max_disks = 0; | |
6190 | mddev->events = 0; | |
a8707c08 | 6191 | mddev->can_decrease_events = 0; |
6177b472 | 6192 | mddev->delta_disks = 0; |
2c810cdd | 6193 | mddev->reshape_backwards = 0; |
6177b472 N |
6194 | mddev->new_level = LEVEL_NONE; |
6195 | mddev->new_layout = 0; | |
6196 | mddev->new_chunk_sectors = 0; | |
6197 | mddev->curr_resync = 0; | |
7f7583d4 | 6198 | atomic64_set(&mddev->resync_mismatches, 0); |
6177b472 N |
6199 | mddev->suspend_lo = mddev->suspend_hi = 0; |
6200 | mddev->sync_speed_min = mddev->sync_speed_max = 0; | |
6201 | mddev->recovery = 0; | |
6202 | mddev->in_sync = 0; | |
f0b4f7e2 | 6203 | mddev->changed = 0; |
6177b472 | 6204 | mddev->degraded = 0; |
6177b472 | 6205 | mddev->safemode = 0; |
bd691922 | 6206 | mddev->private = NULL; |
c20c33f0 | 6207 | mddev->cluster_info = NULL; |
6177b472 N |
6208 | mddev->bitmap_info.offset = 0; |
6209 | mddev->bitmap_info.default_offset = 0; | |
6409bb05 | 6210 | mddev->bitmap_info.default_space = 0; |
6177b472 N |
6211 | mddev->bitmap_info.chunksize = 0; |
6212 | mddev->bitmap_info.daemon_sleep = 0; | |
6213 | mddev->bitmap_info.max_write_behind = 0; | |
c20c33f0 | 6214 | mddev->bitmap_info.nodes = 0; |
6177b472 N |
6215 | } |
6216 | ||
fd01b88c | 6217 | static void __md_stop_writes(struct mddev *mddev) |
a047e125 | 6218 | { |
6b6204ee | 6219 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
21e0958e GJ |
6220 | if (work_pending(&mddev->del_work)) |
6221 | flush_workqueue(md_misc_wq); | |
a047e125 | 6222 | if (mddev->sync_thread) { |
a047e125 | 6223 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
a91d5ac0 | 6224 | md_reap_sync_thread(mddev); |
a047e125 N |
6225 | } |
6226 | ||
6227 | del_timer_sync(&mddev->safemode_timer); | |
6228 | ||
034e33f5 SL |
6229 | if (mddev->pers && mddev->pers->quiesce) { |
6230 | mddev->pers->quiesce(mddev, 1); | |
6231 | mddev->pers->quiesce(mddev, 0); | |
6232 | } | |
e64e4018 | 6233 | md_bitmap_flush(mddev); |
a047e125 | 6234 | |
b6d428c6 | 6235 | if (mddev->ro == 0 && |
28c1b9fd | 6236 | ((!mddev->in_sync && !mddev_is_clustered(mddev)) || |
2953079c | 6237 | mddev->sb_flags)) { |
a047e125 | 6238 | /* mark array as shutdown cleanly */ |
28c1b9fd GR |
6239 | if (!mddev_is_clustered(mddev)) |
6240 | mddev->in_sync = 1; | |
a047e125 N |
6241 | md_update_sb(mddev, 1); |
6242 | } | |
69b00b5b GJ |
6243 | /* disable policy to guarantee rdevs free resources for serialization */ |
6244 | mddev->serialize_policy = 0; | |
6245 | mddev_destroy_serial_pool(mddev, NULL, true); | |
a047e125 | 6246 | } |
defad61a | 6247 | |
fd01b88c | 6248 | void md_stop_writes(struct mddev *mddev) |
defad61a | 6249 | { |
29f097c4 | 6250 | mddev_lock_nointr(mddev); |
defad61a N |
6251 | __md_stop_writes(mddev); |
6252 | mddev_unlock(mddev); | |
6253 | } | |
390ee602 | 6254 | EXPORT_SYMBOL_GPL(md_stop_writes); |
a047e125 | 6255 | |
5aa61f42 N |
6256 | static void mddev_detach(struct mddev *mddev) |
6257 | { | |
e64e4018 | 6258 | md_bitmap_wait_behind_writes(mddev); |
6b40bec3 | 6259 | if (mddev->pers && mddev->pers->quiesce && !mddev->suspended) { |
5aa61f42 N |
6260 | mddev->pers->quiesce(mddev, 1); |
6261 | mddev->pers->quiesce(mddev, 0); | |
6262 | } | |
6263 | md_unregister_thread(&mddev->thread); | |
6264 | if (mddev->queue) | |
6265 | blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ | |
6266 | } | |
6267 | ||
5eff3c43 | 6268 | static void __md_stop(struct mddev *mddev) |
6177b472 | 6269 | { |
36d091f4 | 6270 | struct md_personality *pers = mddev->pers; |
e64e4018 | 6271 | md_bitmap_destroy(mddev); |
5aa61f42 | 6272 | mddev_detach(mddev); |
ee5d004f | 6273 | /* Ensure ->event_work is done */ |
21e0958e GJ |
6274 | if (mddev->event_work.func) |
6275 | flush_workqueue(md_misc_wq); | |
36d091f4 | 6276 | spin_lock(&mddev->lock); |
6177b472 | 6277 | mddev->pers = NULL; |
36d091f4 N |
6278 | spin_unlock(&mddev->lock); |
6279 | pers->free(mddev, mddev->private); | |
bd691922 | 6280 | mddev->private = NULL; |
36d091f4 N |
6281 | if (pers->sync_request && mddev->to_remove == NULL) |
6282 | mddev->to_remove = &md_redundancy_group; | |
6283 | module_put(pers->owner); | |
cca9cf90 | 6284 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
6aaa58c9 JW |
6285 | } |
6286 | ||
6287 | void md_stop(struct mddev *mddev) | |
6288 | { | |
6289 | /* stop the array and free an attached data structures. | |
6290 | * This is called from dm-raid | |
6291 | */ | |
6292 | __md_stop(mddev); | |
afeee514 KO |
6293 | bioset_exit(&mddev->bio_set); |
6294 | bioset_exit(&mddev->sync_set); | |
5eff3c43 N |
6295 | } |
6296 | ||
390ee602 | 6297 | EXPORT_SYMBOL_GPL(md_stop); |
6177b472 | 6298 | |
a05b7ea0 | 6299 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) |
a4bd82d0 N |
6300 | { |
6301 | int err = 0; | |
30b8feb7 N |
6302 | int did_freeze = 0; |
6303 | ||
6304 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6305 | did_freeze = 1; | |
6306 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6307 | md_wakeup_thread(mddev->thread); | |
6308 | } | |
f851b60d | 6309 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6310 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6311 | if (mddev->sync_thread) |
30b8feb7 N |
6312 | /* Thread might be blocked waiting for metadata update |
6313 | * which will now never happen */ | |
6314 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6315 | |
2953079c | 6316 | if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
88724bfa | 6317 | return -EBUSY; |
30b8feb7 | 6318 | mddev_unlock(mddev); |
f851b60d N |
6319 | wait_event(resync_wait, !test_bit(MD_RECOVERY_RUNNING, |
6320 | &mddev->recovery)); | |
88724bfa | 6321 | wait_event(mddev->sb_wait, |
2953079c | 6322 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
30b8feb7 N |
6323 | mddev_lock_nointr(mddev); |
6324 | ||
a4bd82d0 | 6325 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6326 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 | 6327 | mddev->sync_thread || |
af8d8e6f | 6328 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6329 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
30b8feb7 N |
6330 | if (did_freeze) { |
6331 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6332 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6333 | md_wakeup_thread(mddev->thread); |
6334 | } | |
a4bd82d0 N |
6335 | err = -EBUSY; |
6336 | goto out; | |
6337 | } | |
6338 | if (mddev->pers) { | |
defad61a | 6339 | __md_stop_writes(mddev); |
a4bd82d0 N |
6340 | |
6341 | err = -ENXIO; | |
6342 | if (mddev->ro==1) | |
6343 | goto out; | |
6344 | mddev->ro = 1; | |
6345 | set_disk_ro(mddev->gendisk, 1); | |
6346 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d N |
6347 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
6348 | md_wakeup_thread(mddev->thread); | |
00bcb4ac | 6349 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
30b8feb7 | 6350 | err = 0; |
a4bd82d0 N |
6351 | } |
6352 | out: | |
6353 | mutex_unlock(&mddev->open_mutex); | |
6354 | return err; | |
6355 | } | |
6356 | ||
9e653b63 N |
6357 | /* mode: |
6358 | * 0 - completely stop and dis-assemble array | |
9e653b63 N |
6359 | * 2 - stop but do not disassemble array |
6360 | */ | |
f72ffdd6 | 6361 | static int do_md_stop(struct mddev *mddev, int mode, |
a05b7ea0 | 6362 | struct block_device *bdev) |
1da177e4 | 6363 | { |
1da177e4 | 6364 | struct gendisk *disk = mddev->gendisk; |
3cb03002 | 6365 | struct md_rdev *rdev; |
30b8feb7 N |
6366 | int did_freeze = 0; |
6367 | ||
6368 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6369 | did_freeze = 1; | |
6370 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6371 | md_wakeup_thread(mddev->thread); | |
6372 | } | |
f851b60d | 6373 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6374 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6375 | if (mddev->sync_thread) |
30b8feb7 N |
6376 | /* Thread might be blocked waiting for metadata update |
6377 | * which will now never happen */ | |
6378 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6379 | |
30b8feb7 | 6380 | mddev_unlock(mddev); |
f851b60d N |
6381 | wait_event(resync_wait, (mddev->sync_thread == NULL && |
6382 | !test_bit(MD_RECOVERY_RUNNING, | |
6383 | &mddev->recovery))); | |
30b8feb7 | 6384 | mddev_lock_nointr(mddev); |
1da177e4 | 6385 | |
c8c00a69 | 6386 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6387 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 N |
6388 | mddev->sysfs_active || |
6389 | mddev->sync_thread || | |
af8d8e6f | 6390 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6391 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
6e17b027 | 6392 | mutex_unlock(&mddev->open_mutex); |
30b8feb7 N |
6393 | if (did_freeze) { |
6394 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6395 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6396 | md_wakeup_thread(mddev->thread); |
6397 | } | |
260fa034 N |
6398 | return -EBUSY; |
6399 | } | |
6e17b027 | 6400 | if (mddev->pers) { |
a4bd82d0 N |
6401 | if (mddev->ro) |
6402 | set_disk_ro(disk, 0); | |
409c57f3 | 6403 | |
defad61a | 6404 | __md_stop_writes(mddev); |
5eff3c43 | 6405 | __md_stop(mddev); |
6177b472 | 6406 | |
a4bd82d0 | 6407 | /* tell userspace to handle 'inactive' */ |
00bcb4ac | 6408 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0d4ca600 | 6409 | |
dafb20fa | 6410 | rdev_for_each(rdev, mddev) |
36fad858 NK |
6411 | if (rdev->raid_disk >= 0) |
6412 | sysfs_unlink_rdev(mddev, rdev); | |
c4647292 | 6413 | |
2c247c51 | 6414 | set_capacity_and_notify(disk, 0); |
6e17b027 | 6415 | mutex_unlock(&mddev->open_mutex); |
f0b4f7e2 | 6416 | mddev->changed = 1; |
0d4ca600 | 6417 | |
a4bd82d0 N |
6418 | if (mddev->ro) |
6419 | mddev->ro = 0; | |
6e17b027 N |
6420 | } else |
6421 | mutex_unlock(&mddev->open_mutex); | |
1da177e4 LT |
6422 | /* |
6423 | * Free resources if final stop | |
6424 | */ | |
9e653b63 | 6425 | if (mode == 0) { |
9d48739e | 6426 | pr_info("md: %s stopped.\n", mdname(mddev)); |
1da177e4 | 6427 | |
c3d9714e | 6428 | if (mddev->bitmap_info.file) { |
4af1a041 N |
6429 | struct file *f = mddev->bitmap_info.file; |
6430 | spin_lock(&mddev->lock); | |
c3d9714e | 6431 | mddev->bitmap_info.file = NULL; |
4af1a041 N |
6432 | spin_unlock(&mddev->lock); |
6433 | fput(f); | |
978f946b | 6434 | } |
c3d9714e | 6435 | mddev->bitmap_info.offset = 0; |
978f946b | 6436 | |
1da177e4 LT |
6437 | export_array(mddev); |
6438 | ||
6177b472 | 6439 | md_clean(mddev); |
efeb53c0 N |
6440 | if (mddev->hold_active == UNTIL_STOP) |
6441 | mddev->hold_active = 0; | |
a4bd82d0 | 6442 | } |
d7603b7e | 6443 | md_new_event(mddev); |
00bcb4ac | 6444 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6e17b027 | 6445 | return 0; |
1da177e4 LT |
6446 | } |
6447 | ||
fdee8ae4 | 6448 | #ifndef MODULE |
fd01b88c | 6449 | static void autorun_array(struct mddev *mddev) |
1da177e4 | 6450 | { |
3cb03002 | 6451 | struct md_rdev *rdev; |
1da177e4 LT |
6452 | int err; |
6453 | ||
a757e64c | 6454 | if (list_empty(&mddev->disks)) |
1da177e4 | 6455 | return; |
1da177e4 | 6456 | |
9d48739e | 6457 | pr_info("md: running: "); |
1da177e4 | 6458 | |
dafb20fa | 6459 | rdev_for_each(rdev, mddev) { |
1da177e4 | 6460 | char b[BDEVNAME_SIZE]; |
9d48739e | 6461 | pr_cont("<%s>", bdevname(rdev->bdev,b)); |
1da177e4 | 6462 | } |
9d48739e | 6463 | pr_cont("\n"); |
1da177e4 | 6464 | |
d710e138 | 6465 | err = do_md_run(mddev); |
1da177e4 | 6466 | if (err) { |
9d48739e | 6467 | pr_warn("md: do_md_run() returned %d\n", err); |
a05b7ea0 | 6468 | do_md_stop(mddev, 0, NULL); |
1da177e4 LT |
6469 | } |
6470 | } | |
6471 | ||
6472 | /* | |
6473 | * lets try to run arrays based on all disks that have arrived | |
6474 | * until now. (those are in pending_raid_disks) | |
6475 | * | |
6476 | * the method: pick the first pending disk, collect all disks with | |
6477 | * the same UUID, remove all from the pending list and put them into | |
6478 | * the 'same_array' list. Then order this list based on superblock | |
6479 | * update time (freshest comes first), kick out 'old' disks and | |
6480 | * compare superblocks. If everything's fine then run it. | |
6481 | * | |
6482 | * If "unit" is allocated, then bump its reference count | |
6483 | */ | |
6484 | static void autorun_devices(int part) | |
6485 | { | |
3cb03002 | 6486 | struct md_rdev *rdev0, *rdev, *tmp; |
fd01b88c | 6487 | struct mddev *mddev; |
1da177e4 LT |
6488 | char b[BDEVNAME_SIZE]; |
6489 | ||
9d48739e | 6490 | pr_info("md: autorun ...\n"); |
1da177e4 | 6491 | while (!list_empty(&pending_raid_disks)) { |
e8703fe1 | 6492 | int unit; |
1da177e4 | 6493 | dev_t dev; |
ad01c9e3 | 6494 | LIST_HEAD(candidates); |
1da177e4 | 6495 | rdev0 = list_entry(pending_raid_disks.next, |
3cb03002 | 6496 | struct md_rdev, same_set); |
1da177e4 | 6497 | |
9d48739e | 6498 | pr_debug("md: considering %s ...\n", bdevname(rdev0->bdev,b)); |
1da177e4 | 6499 | INIT_LIST_HEAD(&candidates); |
159ec1fc | 6500 | rdev_for_each_list(rdev, tmp, &pending_raid_disks) |
1da177e4 | 6501 | if (super_90_load(rdev, rdev0, 0) >= 0) { |
9d48739e N |
6502 | pr_debug("md: adding %s ...\n", |
6503 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
6504 | list_move(&rdev->same_set, &candidates); |
6505 | } | |
6506 | /* | |
6507 | * now we have a set of devices, with all of them having | |
6508 | * mostly sane superblocks. It's time to allocate the | |
6509 | * mddev. | |
6510 | */ | |
e8703fe1 N |
6511 | if (part) { |
6512 | dev = MKDEV(mdp_major, | |
6513 | rdev0->preferred_minor << MdpMinorShift); | |
6514 | unit = MINOR(dev) >> MdpMinorShift; | |
6515 | } else { | |
6516 | dev = MKDEV(MD_MAJOR, rdev0->preferred_minor); | |
6517 | unit = MINOR(dev); | |
6518 | } | |
6519 | if (rdev0->preferred_minor != unit) { | |
9d48739e N |
6520 | pr_warn("md: unit number in %s is bad: %d\n", |
6521 | bdevname(rdev0->bdev, b), rdev0->preferred_minor); | |
1da177e4 LT |
6522 | break; |
6523 | } | |
1da177e4 | 6524 | |
28144f99 | 6525 | md_probe(dev); |
1da177e4 | 6526 | mddev = mddev_find(dev); |
9bbbca3a NB |
6527 | if (!mddev || !mddev->gendisk) { |
6528 | if (mddev) | |
6529 | mddev_put(mddev); | |
1da177e4 LT |
6530 | break; |
6531 | } | |
f72ffdd6 | 6532 | if (mddev_lock(mddev)) |
9d48739e | 6533 | pr_warn("md: %s locked, cannot run\n", mdname(mddev)); |
1da177e4 LT |
6534 | else if (mddev->raid_disks || mddev->major_version |
6535 | || !list_empty(&mddev->disks)) { | |
9d48739e | 6536 | pr_warn("md: %s already running, cannot run %s\n", |
1da177e4 LT |
6537 | mdname(mddev), bdevname(rdev0->bdev,b)); |
6538 | mddev_unlock(mddev); | |
6539 | } else { | |
9d48739e | 6540 | pr_debug("md: created %s\n", mdname(mddev)); |
1ec4a939 | 6541 | mddev->persistent = 1; |
159ec1fc | 6542 | rdev_for_each_list(rdev, tmp, &candidates) { |
1da177e4 LT |
6543 | list_del_init(&rdev->same_set); |
6544 | if (bind_rdev_to_array(rdev, mddev)) | |
6545 | export_rdev(rdev); | |
6546 | } | |
6547 | autorun_array(mddev); | |
6548 | mddev_unlock(mddev); | |
6549 | } | |
6550 | /* on success, candidates will be empty, on error | |
6551 | * it won't... | |
6552 | */ | |
159ec1fc | 6553 | rdev_for_each_list(rdev, tmp, &candidates) { |
4b80991c | 6554 | list_del_init(&rdev->same_set); |
1da177e4 | 6555 | export_rdev(rdev); |
4b80991c | 6556 | } |
1da177e4 LT |
6557 | mddev_put(mddev); |
6558 | } | |
9d48739e | 6559 | pr_info("md: ... autorun DONE.\n"); |
1da177e4 | 6560 | } |
fdee8ae4 | 6561 | #endif /* !MODULE */ |
1da177e4 | 6562 | |
f72ffdd6 | 6563 | static int get_version(void __user *arg) |
1da177e4 LT |
6564 | { |
6565 | mdu_version_t ver; | |
6566 | ||
6567 | ver.major = MD_MAJOR_VERSION; | |
6568 | ver.minor = MD_MINOR_VERSION; | |
6569 | ver.patchlevel = MD_PATCHLEVEL_VERSION; | |
6570 | ||
6571 | if (copy_to_user(arg, &ver, sizeof(ver))) | |
6572 | return -EFAULT; | |
6573 | ||
6574 | return 0; | |
6575 | } | |
6576 | ||
f72ffdd6 | 6577 | static int get_array_info(struct mddev *mddev, void __user *arg) |
1da177e4 LT |
6578 | { |
6579 | mdu_array_info_t info; | |
a9f326eb | 6580 | int nr,working,insync,failed,spare; |
3cb03002 | 6581 | struct md_rdev *rdev; |
1da177e4 | 6582 | |
1ca69c4b N |
6583 | nr = working = insync = failed = spare = 0; |
6584 | rcu_read_lock(); | |
6585 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 6586 | nr++; |
b2d444d7 | 6587 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
6588 | failed++; |
6589 | else { | |
6590 | working++; | |
b2d444d7 | 6591 | if (test_bit(In_sync, &rdev->flags)) |
f72ffdd6 | 6592 | insync++; |
b347af81 SL |
6593 | else if (test_bit(Journal, &rdev->flags)) |
6594 | /* TODO: add journal count to md_u.h */ | |
6595 | ; | |
1da177e4 LT |
6596 | else |
6597 | spare++; | |
6598 | } | |
6599 | } | |
1ca69c4b | 6600 | rcu_read_unlock(); |
1da177e4 LT |
6601 | |
6602 | info.major_version = mddev->major_version; | |
6603 | info.minor_version = mddev->minor_version; | |
6604 | info.patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6605 | info.ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 6606 | info.level = mddev->level; |
58c0fed4 AN |
6607 | info.size = mddev->dev_sectors / 2; |
6608 | if (info.size != mddev->dev_sectors / 2) /* overflow */ | |
284ae7ca | 6609 | info.size = -1; |
1da177e4 LT |
6610 | info.nr_disks = nr; |
6611 | info.raid_disks = mddev->raid_disks; | |
6612 | info.md_minor = mddev->md_minor; | |
6613 | info.not_persistent= !mddev->persistent; | |
6614 | ||
9ebc6ef1 | 6615 | info.utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
6616 | info.state = 0; |
6617 | if (mddev->in_sync) | |
6618 | info.state = (1<<MD_SB_CLEAN); | |
c3d9714e | 6619 | if (mddev->bitmap && mddev->bitmap_info.offset) |
9bd35920 | 6620 | info.state |= (1<<MD_SB_BITMAP_PRESENT); |
ca8895d9 GR |
6621 | if (mddev_is_clustered(mddev)) |
6622 | info.state |= (1<<MD_SB_CLUSTERED); | |
a9f326eb | 6623 | info.active_disks = insync; |
1da177e4 LT |
6624 | info.working_disks = working; |
6625 | info.failed_disks = failed; | |
6626 | info.spare_disks = spare; | |
6627 | ||
6628 | info.layout = mddev->layout; | |
9d8f0363 | 6629 | info.chunk_size = mddev->chunk_sectors << 9; |
1da177e4 LT |
6630 | |
6631 | if (copy_to_user(arg, &info, sizeof(info))) | |
6632 | return -EFAULT; | |
6633 | ||
6634 | return 0; | |
6635 | } | |
6636 | ||
f72ffdd6 | 6637 | static int get_bitmap_file(struct mddev *mddev, void __user * arg) |
32a7627c N |
6638 | { |
6639 | mdu_bitmap_file_t *file = NULL; /* too big for stack allocation */ | |
f4ad3d38 | 6640 | char *ptr; |
4af1a041 | 6641 | int err; |
32a7627c | 6642 | |
b6878d9e | 6643 | file = kzalloc(sizeof(*file), GFP_NOIO); |
32a7627c | 6644 | if (!file) |
4af1a041 | 6645 | return -ENOMEM; |
32a7627c | 6646 | |
4af1a041 N |
6647 | err = 0; |
6648 | spin_lock(&mddev->lock); | |
25eafe1a BR |
6649 | /* bitmap enabled */ |
6650 | if (mddev->bitmap_info.file) { | |
6651 | ptr = file_path(mddev->bitmap_info.file, file->pathname, | |
6652 | sizeof(file->pathname)); | |
6653 | if (IS_ERR(ptr)) | |
6654 | err = PTR_ERR(ptr); | |
6655 | else | |
6656 | memmove(file->pathname, ptr, | |
6657 | sizeof(file->pathname)-(ptr-file->pathname)); | |
6658 | } | |
4af1a041 | 6659 | spin_unlock(&mddev->lock); |
32a7627c | 6660 | |
4af1a041 N |
6661 | if (err == 0 && |
6662 | copy_to_user(arg, file, sizeof(*file))) | |
32a7627c | 6663 | err = -EFAULT; |
4af1a041 | 6664 | |
32a7627c N |
6665 | kfree(file); |
6666 | return err; | |
6667 | } | |
6668 | ||
f72ffdd6 | 6669 | static int get_disk_info(struct mddev *mddev, void __user * arg) |
1da177e4 LT |
6670 | { |
6671 | mdu_disk_info_t info; | |
3cb03002 | 6672 | struct md_rdev *rdev; |
1da177e4 LT |
6673 | |
6674 | if (copy_from_user(&info, arg, sizeof(info))) | |
6675 | return -EFAULT; | |
6676 | ||
1ca69c4b | 6677 | rcu_read_lock(); |
57d051dc | 6678 | rdev = md_find_rdev_nr_rcu(mddev, info.number); |
1da177e4 LT |
6679 | if (rdev) { |
6680 | info.major = MAJOR(rdev->bdev->bd_dev); | |
6681 | info.minor = MINOR(rdev->bdev->bd_dev); | |
6682 | info.raid_disk = rdev->raid_disk; | |
6683 | info.state = 0; | |
b2d444d7 | 6684 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 6685 | info.state |= (1<<MD_DISK_FAULTY); |
b2d444d7 | 6686 | else if (test_bit(In_sync, &rdev->flags)) { |
1da177e4 LT |
6687 | info.state |= (1<<MD_DISK_ACTIVE); |
6688 | info.state |= (1<<MD_DISK_SYNC); | |
6689 | } | |
9efdca16 | 6690 | if (test_bit(Journal, &rdev->flags)) |
bac624f3 | 6691 | info.state |= (1<<MD_DISK_JOURNAL); |
8ddf9efe N |
6692 | if (test_bit(WriteMostly, &rdev->flags)) |
6693 | info.state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
6694 | if (test_bit(FailFast, &rdev->flags)) |
6695 | info.state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 LT |
6696 | } else { |
6697 | info.major = info.minor = 0; | |
6698 | info.raid_disk = -1; | |
6699 | info.state = (1<<MD_DISK_REMOVED); | |
6700 | } | |
1ca69c4b | 6701 | rcu_read_unlock(); |
1da177e4 LT |
6702 | |
6703 | if (copy_to_user(arg, &info, sizeof(info))) | |
6704 | return -EFAULT; | |
6705 | ||
6706 | return 0; | |
6707 | } | |
6708 | ||
7e0adbfc | 6709 | int md_add_new_disk(struct mddev *mddev, struct mdu_disk_info_s *info) |
1da177e4 LT |
6710 | { |
6711 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 6712 | struct md_rdev *rdev; |
1da177e4 LT |
6713 | dev_t dev = MKDEV(info->major,info->minor); |
6714 | ||
1aee41f6 GR |
6715 | if (mddev_is_clustered(mddev) && |
6716 | !(info->state & ((1 << MD_DISK_CLUSTER_ADD) | (1 << MD_DISK_CANDIDATE)))) { | |
9d48739e N |
6717 | pr_warn("%s: Cannot add to clustered mddev.\n", |
6718 | mdname(mddev)); | |
1aee41f6 GR |
6719 | return -EINVAL; |
6720 | } | |
6721 | ||
1da177e4 LT |
6722 | if (info->major != MAJOR(dev) || info->minor != MINOR(dev)) |
6723 | return -EOVERFLOW; | |
6724 | ||
6725 | if (!mddev->raid_disks) { | |
6726 | int err; | |
6727 | /* expecting a device which has a superblock */ | |
6728 | rdev = md_import_device(dev, mddev->major_version, mddev->minor_version); | |
6729 | if (IS_ERR(rdev)) { | |
9d48739e | 6730 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6731 | PTR_ERR(rdev)); |
6732 | return PTR_ERR(rdev); | |
6733 | } | |
6734 | if (!list_empty(&mddev->disks)) { | |
3cb03002 N |
6735 | struct md_rdev *rdev0 |
6736 | = list_entry(mddev->disks.next, | |
6737 | struct md_rdev, same_set); | |
a9f326eb | 6738 | err = super_types[mddev->major_version] |
1da177e4 LT |
6739 | .load_super(rdev, rdev0, mddev->minor_version); |
6740 | if (err < 0) { | |
9d48739e | 6741 | pr_warn("md: %s has different UUID to %s\n", |
f72ffdd6 | 6742 | bdevname(rdev->bdev,b), |
1da177e4 LT |
6743 | bdevname(rdev0->bdev,b2)); |
6744 | export_rdev(rdev); | |
6745 | return -EINVAL; | |
6746 | } | |
6747 | } | |
6748 | err = bind_rdev_to_array(rdev, mddev); | |
6749 | if (err) | |
6750 | export_rdev(rdev); | |
6751 | return err; | |
6752 | } | |
6753 | ||
6754 | /* | |
7e0adbfc | 6755 | * md_add_new_disk can be used once the array is assembled |
1da177e4 LT |
6756 | * to add "hot spares". They must already have a superblock |
6757 | * written | |
6758 | */ | |
6759 | if (mddev->pers) { | |
6760 | int err; | |
6761 | if (!mddev->pers->hot_add_disk) { | |
9d48739e N |
6762 | pr_warn("%s: personality does not support diskops!\n", |
6763 | mdname(mddev)); | |
1da177e4 LT |
6764 | return -EINVAL; |
6765 | } | |
7b1e35f6 N |
6766 | if (mddev->persistent) |
6767 | rdev = md_import_device(dev, mddev->major_version, | |
6768 | mddev->minor_version); | |
6769 | else | |
6770 | rdev = md_import_device(dev, -1, -1); | |
1da177e4 | 6771 | if (IS_ERR(rdev)) { |
9d48739e | 6772 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6773 | PTR_ERR(rdev)); |
6774 | return PTR_ERR(rdev); | |
6775 | } | |
1a855a06 | 6776 | /* set saved_raid_disk if appropriate */ |
41158c7e N |
6777 | if (!mddev->persistent) { |
6778 | if (info->state & (1<<MD_DISK_SYNC) && | |
bf572541 | 6779 | info->raid_disk < mddev->raid_disks) { |
41158c7e | 6780 | rdev->raid_disk = info->raid_disk; |
bf572541 | 6781 | set_bit(In_sync, &rdev->flags); |
8313b8e5 | 6782 | clear_bit(Bitmap_sync, &rdev->flags); |
bf572541 | 6783 | } else |
41158c7e | 6784 | rdev->raid_disk = -1; |
f466722c | 6785 | rdev->saved_raid_disk = rdev->raid_disk; |
41158c7e N |
6786 | } else |
6787 | super_types[mddev->major_version]. | |
6788 | validate_super(mddev, rdev); | |
bedd86b7 | 6789 | if ((info->state & (1<<MD_DISK_SYNC)) && |
f4563091 | 6790 | rdev->raid_disk != info->raid_disk) { |
bedd86b7 N |
6791 | /* This was a hot-add request, but events doesn't |
6792 | * match, so reject it. | |
6793 | */ | |
6794 | export_rdev(rdev); | |
6795 | return -EINVAL; | |
6796 | } | |
6797 | ||
b2d444d7 | 6798 | clear_bit(In_sync, &rdev->flags); /* just to be sure */ |
8ddf9efe N |
6799 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6800 | set_bit(WriteMostly, &rdev->flags); | |
575a80fa N |
6801 | else |
6802 | clear_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6803 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6804 | set_bit(FailFast, &rdev->flags); | |
6805 | else | |
6806 | clear_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6807 | |
f6b6ec5c SL |
6808 | if (info->state & (1<<MD_DISK_JOURNAL)) { |
6809 | struct md_rdev *rdev2; | |
6810 | bool has_journal = false; | |
6811 | ||
6812 | /* make sure no existing journal disk */ | |
6813 | rdev_for_each(rdev2, mddev) { | |
6814 | if (test_bit(Journal, &rdev2->flags)) { | |
6815 | has_journal = true; | |
6816 | break; | |
6817 | } | |
6818 | } | |
230b55fa | 6819 | if (has_journal || mddev->bitmap) { |
f6b6ec5c SL |
6820 | export_rdev(rdev); |
6821 | return -EBUSY; | |
6822 | } | |
bac624f3 | 6823 | set_bit(Journal, &rdev->flags); |
f6b6ec5c | 6824 | } |
1aee41f6 GR |
6825 | /* |
6826 | * check whether the device shows up in other nodes | |
6827 | */ | |
6828 | if (mddev_is_clustered(mddev)) { | |
dbb64f86 | 6829 | if (info->state & (1 << MD_DISK_CANDIDATE)) |
1aee41f6 | 6830 | set_bit(Candidate, &rdev->flags); |
dbb64f86 | 6831 | else if (info->state & (1 << MD_DISK_CLUSTER_ADD)) { |
1aee41f6 | 6832 | /* --add initiated by this node */ |
dbb64f86 | 6833 | err = md_cluster_ops->add_new_disk(mddev, rdev); |
1aee41f6 | 6834 | if (err) { |
1aee41f6 GR |
6835 | export_rdev(rdev); |
6836 | return err; | |
6837 | } | |
6838 | } | |
6839 | } | |
6840 | ||
1da177e4 LT |
6841 | rdev->raid_disk = -1; |
6842 | err = bind_rdev_to_array(rdev, mddev); | |
dbb64f86 | 6843 | |
1da177e4 LT |
6844 | if (err) |
6845 | export_rdev(rdev); | |
dbb64f86 GR |
6846 | |
6847 | if (mddev_is_clustered(mddev)) { | |
e566aef1 GJ |
6848 | if (info->state & (1 << MD_DISK_CANDIDATE)) { |
6849 | if (!err) { | |
6850 | err = md_cluster_ops->new_disk_ack(mddev, | |
6851 | err == 0); | |
6852 | if (err) | |
6853 | md_kick_rdev_from_array(rdev); | |
6854 | } | |
6855 | } else { | |
dbb64f86 GR |
6856 | if (err) |
6857 | md_cluster_ops->add_new_disk_cancel(mddev); | |
6858 | else | |
6859 | err = add_bound_rdev(rdev); | |
6860 | } | |
6861 | ||
6862 | } else if (!err) | |
a6da4ef8 | 6863 | err = add_bound_rdev(rdev); |
dbb64f86 | 6864 | |
1da177e4 LT |
6865 | return err; |
6866 | } | |
6867 | ||
7e0adbfc | 6868 | /* otherwise, md_add_new_disk is only allowed |
1da177e4 LT |
6869 | * for major_version==0 superblocks |
6870 | */ | |
6871 | if (mddev->major_version != 0) { | |
9d48739e | 6872 | pr_warn("%s: ADD_NEW_DISK not supported\n", mdname(mddev)); |
1da177e4 LT |
6873 | return -EINVAL; |
6874 | } | |
6875 | ||
6876 | if (!(info->state & (1<<MD_DISK_FAULTY))) { | |
6877 | int err; | |
d710e138 | 6878 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6879 | if (IS_ERR(rdev)) { |
9d48739e | 6880 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6881 | PTR_ERR(rdev)); |
6882 | return PTR_ERR(rdev); | |
6883 | } | |
6884 | rdev->desc_nr = info->number; | |
6885 | if (info->raid_disk < mddev->raid_disks) | |
6886 | rdev->raid_disk = info->raid_disk; | |
6887 | else | |
6888 | rdev->raid_disk = -1; | |
6889 | ||
1da177e4 | 6890 | if (rdev->raid_disk < mddev->raid_disks) |
b2d444d7 N |
6891 | if (info->state & (1<<MD_DISK_SYNC)) |
6892 | set_bit(In_sync, &rdev->flags); | |
1da177e4 | 6893 | |
8ddf9efe N |
6894 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6895 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6896 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6897 | set_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6898 | |
1da177e4 | 6899 | if (!mddev->persistent) { |
9d48739e | 6900 | pr_debug("md: nonpersistent superblock ...\n"); |
77304d2a MS |
6901 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
6902 | } else | |
57b2caa3 | 6903 | rdev->sb_start = calc_dev_sboffset(rdev); |
8190e754 | 6904 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6905 | |
2bf071bf N |
6906 | err = bind_rdev_to_array(rdev, mddev); |
6907 | if (err) { | |
6908 | export_rdev(rdev); | |
6909 | return err; | |
6910 | } | |
1da177e4 LT |
6911 | } |
6912 | ||
6913 | return 0; | |
6914 | } | |
6915 | ||
f72ffdd6 | 6916 | static int hot_remove_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6917 | { |
6918 | char b[BDEVNAME_SIZE]; | |
3cb03002 | 6919 | struct md_rdev *rdev; |
1da177e4 | 6920 | |
c42a0e26 YY |
6921 | if (!mddev->pers) |
6922 | return -ENODEV; | |
6923 | ||
1da177e4 LT |
6924 | rdev = find_rdev(mddev, dev); |
6925 | if (!rdev) | |
6926 | return -ENXIO; | |
6927 | ||
2910ff17 GR |
6928 | if (rdev->raid_disk < 0) |
6929 | goto kick_rdev; | |
293467aa | 6930 | |
3ea8929d N |
6931 | clear_bit(Blocked, &rdev->flags); |
6932 | remove_and_add_spares(mddev, rdev); | |
6933 | ||
1da177e4 LT |
6934 | if (rdev->raid_disk >= 0) |
6935 | goto busy; | |
6936 | ||
2910ff17 | 6937 | kick_rdev: |
bca5b065 ZH |
6938 | if (mddev_is_clustered(mddev)) { |
6939 | if (md_cluster_ops->remove_disk(mddev, rdev)) | |
6940 | goto busy; | |
6941 | } | |
88bcfef7 | 6942 | |
fb56dfef | 6943 | md_kick_rdev_from_array(rdev); |
2953079c | 6944 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6945 | if (mddev->thread) |
6946 | md_wakeup_thread(mddev->thread); | |
6947 | else | |
6948 | md_update_sb(mddev, 1); | |
d7603b7e | 6949 | md_new_event(mddev); |
1da177e4 LT |
6950 | |
6951 | return 0; | |
6952 | busy: | |
9d48739e N |
6953 | pr_debug("md: cannot remove active disk %s from %s ...\n", |
6954 | bdevname(rdev->bdev,b), mdname(mddev)); | |
1da177e4 LT |
6955 | return -EBUSY; |
6956 | } | |
6957 | ||
f72ffdd6 | 6958 | static int hot_add_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6959 | { |
6960 | char b[BDEVNAME_SIZE]; | |
6961 | int err; | |
3cb03002 | 6962 | struct md_rdev *rdev; |
1da177e4 LT |
6963 | |
6964 | if (!mddev->pers) | |
6965 | return -ENODEV; | |
6966 | ||
6967 | if (mddev->major_version != 0) { | |
9d48739e | 6968 | pr_warn("%s: HOT_ADD may only be used with version-0 superblocks.\n", |
1da177e4 LT |
6969 | mdname(mddev)); |
6970 | return -EINVAL; | |
6971 | } | |
6972 | if (!mddev->pers->hot_add_disk) { | |
9d48739e | 6973 | pr_warn("%s: personality does not support diskops!\n", |
1da177e4 LT |
6974 | mdname(mddev)); |
6975 | return -EINVAL; | |
6976 | } | |
6977 | ||
d710e138 | 6978 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6979 | if (IS_ERR(rdev)) { |
9d48739e | 6980 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6981 | PTR_ERR(rdev)); |
6982 | return -EINVAL; | |
6983 | } | |
6984 | ||
6985 | if (mddev->persistent) | |
57b2caa3 | 6986 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 6987 | else |
77304d2a | 6988 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
1da177e4 | 6989 | |
8190e754 | 6990 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6991 | |
b2d444d7 | 6992 | if (test_bit(Faulty, &rdev->flags)) { |
9d48739e | 6993 | pr_warn("md: can not hot-add faulty %s disk to %s!\n", |
1da177e4 LT |
6994 | bdevname(rdev->bdev,b), mdname(mddev)); |
6995 | err = -EINVAL; | |
6996 | goto abort_export; | |
6997 | } | |
293467aa | 6998 | |
b2d444d7 | 6999 | clear_bit(In_sync, &rdev->flags); |
1da177e4 | 7000 | rdev->desc_nr = -1; |
5842730d | 7001 | rdev->saved_raid_disk = -1; |
2bf071bf N |
7002 | err = bind_rdev_to_array(rdev, mddev); |
7003 | if (err) | |
2aa82191 | 7004 | goto abort_export; |
1da177e4 LT |
7005 | |
7006 | /* | |
7007 | * The rest should better be atomic, we can have disk failures | |
7008 | * noticed in interrupt contexts ... | |
7009 | */ | |
7010 | ||
1da177e4 LT |
7011 | rdev->raid_disk = -1; |
7012 | ||
2953079c | 7013 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
7014 | if (!mddev->thread) |
7015 | md_update_sb(mddev, 1); | |
1da177e4 LT |
7016 | /* |
7017 | * Kick recovery, maybe this spare has to be added to the | |
7018 | * array immediately. | |
7019 | */ | |
7020 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7021 | md_wakeup_thread(mddev->thread); | |
d7603b7e | 7022 | md_new_event(mddev); |
1da177e4 LT |
7023 | return 0; |
7024 | ||
1da177e4 LT |
7025 | abort_export: |
7026 | export_rdev(rdev); | |
7027 | return err; | |
7028 | } | |
7029 | ||
fd01b88c | 7030 | static int set_bitmap_file(struct mddev *mddev, int fd) |
32a7627c | 7031 | { |
035328c2 | 7032 | int err = 0; |
32a7627c | 7033 | |
36fa3063 | 7034 | if (mddev->pers) { |
d66b1b39 | 7035 | if (!mddev->pers->quiesce || !mddev->thread) |
36fa3063 N |
7036 | return -EBUSY; |
7037 | if (mddev->recovery || mddev->sync_thread) | |
7038 | return -EBUSY; | |
7039 | /* we should be able to change the bitmap.. */ | |
7040 | } | |
32a7627c | 7041 | |
36fa3063 | 7042 | if (fd >= 0) { |
035328c2 | 7043 | struct inode *inode; |
1e594bb2 N |
7044 | struct file *f; |
7045 | ||
7046 | if (mddev->bitmap || mddev->bitmap_info.file) | |
36fa3063 | 7047 | return -EEXIST; /* cannot add when bitmap is present */ |
1e594bb2 | 7048 | f = fget(fd); |
32a7627c | 7049 | |
1e594bb2 | 7050 | if (f == NULL) { |
9d48739e N |
7051 | pr_warn("%s: error: failed to get bitmap file\n", |
7052 | mdname(mddev)); | |
36fa3063 N |
7053 | return -EBADF; |
7054 | } | |
7055 | ||
1e594bb2 | 7056 | inode = f->f_mapping->host; |
035328c2 | 7057 | if (!S_ISREG(inode->i_mode)) { |
9d48739e N |
7058 | pr_warn("%s: error: bitmap file must be a regular file\n", |
7059 | mdname(mddev)); | |
035328c2 | 7060 | err = -EBADF; |
1e594bb2 | 7061 | } else if (!(f->f_mode & FMODE_WRITE)) { |
9d48739e N |
7062 | pr_warn("%s: error: bitmap file must open for write\n", |
7063 | mdname(mddev)); | |
035328c2 N |
7064 | err = -EBADF; |
7065 | } else if (atomic_read(&inode->i_writecount) != 1) { | |
9d48739e N |
7066 | pr_warn("%s: error: bitmap file is already in use\n", |
7067 | mdname(mddev)); | |
035328c2 N |
7068 | err = -EBUSY; |
7069 | } | |
7070 | if (err) { | |
1e594bb2 | 7071 | fput(f); |
36fa3063 N |
7072 | return err; |
7073 | } | |
1e594bb2 | 7074 | mddev->bitmap_info.file = f; |
c3d9714e | 7075 | mddev->bitmap_info.offset = 0; /* file overrides offset */ |
36fa3063 N |
7076 | } else if (mddev->bitmap == NULL) |
7077 | return -ENOENT; /* cannot remove what isn't there */ | |
7078 | err = 0; | |
7079 | if (mddev->pers) { | |
69e51b44 | 7080 | if (fd >= 0) { |
f9209a32 GR |
7081 | struct bitmap *bitmap; |
7082 | ||
e64e4018 | 7083 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7084 | mddev_suspend(mddev); |
f9209a32 GR |
7085 | if (!IS_ERR(bitmap)) { |
7086 | mddev->bitmap = bitmap; | |
e64e4018 | 7087 | err = md_bitmap_load(mddev); |
ba599aca N |
7088 | } else |
7089 | err = PTR_ERR(bitmap); | |
52a0d49d | 7090 | if (err) { |
e64e4018 | 7091 | md_bitmap_destroy(mddev); |
52a0d49d N |
7092 | fd = -1; |
7093 | } | |
9e1cc0a5 | 7094 | mddev_resume(mddev); |
52a0d49d | 7095 | } else if (fd < 0) { |
9e1cc0a5 | 7096 | mddev_suspend(mddev); |
e64e4018 | 7097 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7098 | mddev_resume(mddev); |
d7375ab3 | 7099 | } |
d7375ab3 N |
7100 | } |
7101 | if (fd < 0) { | |
4af1a041 N |
7102 | struct file *f = mddev->bitmap_info.file; |
7103 | if (f) { | |
7104 | spin_lock(&mddev->lock); | |
7105 | mddev->bitmap_info.file = NULL; | |
7106 | spin_unlock(&mddev->lock); | |
7107 | fput(f); | |
7108 | } | |
36fa3063 N |
7109 | } |
7110 | ||
32a7627c N |
7111 | return err; |
7112 | } | |
7113 | ||
1da177e4 | 7114 | /* |
7e0adbfc | 7115 | * md_set_array_info is used two different ways |
1da177e4 LT |
7116 | * The original usage is when creating a new array. |
7117 | * In this usage, raid_disks is > 0 and it together with | |
7118 | * level, size, not_persistent,layout,chunksize determine the | |
7119 | * shape of the array. | |
7120 | * This will always create an array with a type-0.90.0 superblock. | |
7121 | * The newer usage is when assembling an array. | |
7122 | * In this case raid_disks will be 0, and the major_version field is | |
7123 | * use to determine which style super-blocks are to be found on the devices. | |
7124 | * The minor and patch _version numbers are also kept incase the | |
7125 | * super_block handler wishes to interpret them. | |
7126 | */ | |
7e0adbfc | 7127 | int md_set_array_info(struct mddev *mddev, struct mdu_array_info_s *info) |
1da177e4 | 7128 | { |
1da177e4 LT |
7129 | if (info->raid_disks == 0) { |
7130 | /* just setting version number for superblock loading */ | |
7131 | if (info->major_version < 0 || | |
50511da3 | 7132 | info->major_version >= ARRAY_SIZE(super_types) || |
1da177e4 LT |
7133 | super_types[info->major_version].name == NULL) { |
7134 | /* maybe try to auto-load a module? */ | |
9d48739e | 7135 | pr_warn("md: superblock version %d not known\n", |
1da177e4 LT |
7136 | info->major_version); |
7137 | return -EINVAL; | |
7138 | } | |
7139 | mddev->major_version = info->major_version; | |
7140 | mddev->minor_version = info->minor_version; | |
7141 | mddev->patch_version = info->patch_version; | |
3f9d7b0d | 7142 | mddev->persistent = !info->not_persistent; |
cbd19983 N |
7143 | /* ensure mddev_put doesn't delete this now that there |
7144 | * is some minimal configuration. | |
7145 | */ | |
9ebc6ef1 | 7146 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
7147 | return 0; |
7148 | } | |
7149 | mddev->major_version = MD_MAJOR_VERSION; | |
7150 | mddev->minor_version = MD_MINOR_VERSION; | |
7151 | mddev->patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 7152 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
7153 | |
7154 | mddev->level = info->level; | |
17115e03 | 7155 | mddev->clevel[0] = 0; |
58c0fed4 | 7156 | mddev->dev_sectors = 2 * (sector_t)info->size; |
1da177e4 LT |
7157 | mddev->raid_disks = info->raid_disks; |
7158 | /* don't set md_minor, it is determined by which /dev/md* was | |
7159 | * openned | |
7160 | */ | |
7161 | if (info->state & (1<<MD_SB_CLEAN)) | |
7162 | mddev->recovery_cp = MaxSector; | |
7163 | else | |
7164 | mddev->recovery_cp = 0; | |
7165 | mddev->persistent = ! info->not_persistent; | |
e691063a | 7166 | mddev->external = 0; |
1da177e4 LT |
7167 | |
7168 | mddev->layout = info->layout; | |
33f2c35a N |
7169 | if (mddev->level == 0) |
7170 | /* Cannot trust RAID0 layout info here */ | |
7171 | mddev->layout = -1; | |
9d8f0363 | 7172 | mddev->chunk_sectors = info->chunk_size >> 9; |
1da177e4 | 7173 | |
2953079c | 7174 | if (mddev->persistent) { |
1b3bae49 N |
7175 | mddev->max_disks = MD_SB_DISKS; |
7176 | mddev->flags = 0; | |
7177 | mddev->sb_flags = 0; | |
2953079c SL |
7178 | } |
7179 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
1da177e4 | 7180 | |
c3d9714e | 7181 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 7182 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
c3d9714e | 7183 | mddev->bitmap_info.offset = 0; |
b2a2703c | 7184 | |
f6705578 N |
7185 | mddev->reshape_position = MaxSector; |
7186 | ||
1da177e4 LT |
7187 | /* |
7188 | * Generate a 128 bit UUID | |
7189 | */ | |
7190 | get_random_bytes(mddev->uuid, 16); | |
7191 | ||
f6705578 | 7192 | mddev->new_level = mddev->level; |
664e7c41 | 7193 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
7194 | mddev->new_layout = mddev->layout; |
7195 | mddev->delta_disks = 0; | |
2c810cdd | 7196 | mddev->reshape_backwards = 0; |
f6705578 | 7197 | |
1da177e4 LT |
7198 | return 0; |
7199 | } | |
7200 | ||
fd01b88c | 7201 | void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors) |
1f403624 | 7202 | { |
efa4b77b | 7203 | lockdep_assert_held(&mddev->reconfig_mutex); |
b522adcd DW |
7204 | |
7205 | if (mddev->external_size) | |
7206 | return; | |
7207 | ||
1f403624 DW |
7208 | mddev->array_sectors = array_sectors; |
7209 | } | |
7210 | EXPORT_SYMBOL(md_set_array_sectors); | |
7211 | ||
fd01b88c | 7212 | static int update_size(struct mddev *mddev, sector_t num_sectors) |
a35b0d69 | 7213 | { |
3cb03002 | 7214 | struct md_rdev *rdev; |
a35b0d69 | 7215 | int rv; |
d71f9f88 | 7216 | int fit = (num_sectors == 0); |
818da59f | 7217 | sector_t old_dev_sectors = mddev->dev_sectors; |
ab5a98b1 | 7218 | |
a35b0d69 N |
7219 | if (mddev->pers->resize == NULL) |
7220 | return -EINVAL; | |
d71f9f88 AN |
7221 | /* The "num_sectors" is the number of sectors of each device that |
7222 | * is used. This can only make sense for arrays with redundancy. | |
7223 | * linear and raid0 always use whatever space is available. We can only | |
7224 | * consider changing this number if no resync or reconstruction is | |
7225 | * happening, and if the new size is acceptable. It must fit before the | |
0f420358 | 7226 | * sb_start or, if that is <data_offset, it must fit before the size |
d71f9f88 AN |
7227 | * of each device. If num_sectors is zero, we find the largest size |
7228 | * that fits. | |
a35b0d69 | 7229 | */ |
f851b60d N |
7230 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
7231 | mddev->sync_thread) | |
a35b0d69 | 7232 | return -EBUSY; |
bd8839e0 N |
7233 | if (mddev->ro) |
7234 | return -EROFS; | |
a4a6125a | 7235 | |
dafb20fa | 7236 | rdev_for_each(rdev, mddev) { |
dd8ac336 | 7237 | sector_t avail = rdev->sectors; |
01ab5662 | 7238 | |
d71f9f88 AN |
7239 | if (fit && (num_sectors == 0 || num_sectors > avail)) |
7240 | num_sectors = avail; | |
7241 | if (avail < num_sectors) | |
a35b0d69 N |
7242 | return -ENOSPC; |
7243 | } | |
d71f9f88 | 7244 | rv = mddev->pers->resize(mddev, num_sectors); |
c9483634 | 7245 | if (!rv) { |
818da59f GJ |
7246 | if (mddev_is_clustered(mddev)) |
7247 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
7248 | else if (mddev->queue) { | |
2c247c51 CH |
7249 | set_capacity_and_notify(mddev->gendisk, |
7250 | mddev->array_sectors); | |
c9483634 GJ |
7251 | } |
7252 | } | |
a35b0d69 N |
7253 | return rv; |
7254 | } | |
7255 | ||
fd01b88c | 7256 | static int update_raid_disks(struct mddev *mddev, int raid_disks) |
da943b99 N |
7257 | { |
7258 | int rv; | |
c6563a8c | 7259 | struct md_rdev *rdev; |
da943b99 | 7260 | /* change the number of raid disks */ |
63c70c4f | 7261 | if (mddev->pers->check_reshape == NULL) |
da943b99 | 7262 | return -EINVAL; |
bd8839e0 N |
7263 | if (mddev->ro) |
7264 | return -EROFS; | |
da943b99 | 7265 | if (raid_disks <= 0 || |
233fca36 | 7266 | (mddev->max_disks && raid_disks >= mddev->max_disks)) |
da943b99 | 7267 | return -EINVAL; |
f851b60d N |
7268 | if (mddev->sync_thread || |
7269 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || | |
a8da01f7 | 7270 | test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) || |
f851b60d | 7271 | mddev->reshape_position != MaxSector) |
da943b99 | 7272 | return -EBUSY; |
c6563a8c N |
7273 | |
7274 | rdev_for_each(rdev, mddev) { | |
7275 | if (mddev->raid_disks < raid_disks && | |
7276 | rdev->data_offset < rdev->new_data_offset) | |
7277 | return -EINVAL; | |
7278 | if (mddev->raid_disks > raid_disks && | |
7279 | rdev->data_offset > rdev->new_data_offset) | |
7280 | return -EINVAL; | |
7281 | } | |
7282 | ||
63c70c4f | 7283 | mddev->delta_disks = raid_disks - mddev->raid_disks; |
2c810cdd N |
7284 | if (mddev->delta_disks < 0) |
7285 | mddev->reshape_backwards = 1; | |
7286 | else if (mddev->delta_disks > 0) | |
7287 | mddev->reshape_backwards = 0; | |
63c70c4f N |
7288 | |
7289 | rv = mddev->pers->check_reshape(mddev); | |
2c810cdd | 7290 | if (rv < 0) { |
de171cb9 | 7291 | mddev->delta_disks = 0; |
2c810cdd N |
7292 | mddev->reshape_backwards = 0; |
7293 | } | |
da943b99 N |
7294 | return rv; |
7295 | } | |
7296 | ||
1da177e4 LT |
7297 | /* |
7298 | * update_array_info is used to change the configuration of an | |
7299 | * on-line array. | |
7300 | * The version, ctime,level,size,raid_disks,not_persistent, layout,chunk_size | |
7301 | * fields in the info are checked against the array. | |
7302 | * Any differences that cannot be handled will cause an error. | |
7303 | * Normally, only one change can be managed at a time. | |
7304 | */ | |
fd01b88c | 7305 | static int update_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
7306 | { |
7307 | int rv = 0; | |
7308 | int cnt = 0; | |
36fa3063 N |
7309 | int state = 0; |
7310 | ||
7311 | /* calculate expected state,ignoring low bits */ | |
c3d9714e | 7312 | if (mddev->bitmap && mddev->bitmap_info.offset) |
36fa3063 | 7313 | state |= (1 << MD_SB_BITMAP_PRESENT); |
1da177e4 LT |
7314 | |
7315 | if (mddev->major_version != info->major_version || | |
7316 | mddev->minor_version != info->minor_version || | |
7317 | /* mddev->patch_version != info->patch_version || */ | |
7318 | mddev->ctime != info->ctime || | |
7319 | mddev->level != info->level || | |
7320 | /* mddev->layout != info->layout || */ | |
4e023612 | 7321 | mddev->persistent != !info->not_persistent || |
9d8f0363 | 7322 | mddev->chunk_sectors != info->chunk_size >> 9 || |
36fa3063 N |
7323 | /* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */ |
7324 | ((state^info->state) & 0xfffffe00) | |
7325 | ) | |
1da177e4 LT |
7326 | return -EINVAL; |
7327 | /* Check there is only one change */ | |
58c0fed4 AN |
7328 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
7329 | cnt++; | |
7330 | if (mddev->raid_disks != info->raid_disks) | |
7331 | cnt++; | |
7332 | if (mddev->layout != info->layout) | |
7333 | cnt++; | |
7334 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) | |
7335 | cnt++; | |
7336 | if (cnt == 0) | |
7337 | return 0; | |
7338 | if (cnt > 1) | |
7339 | return -EINVAL; | |
1da177e4 LT |
7340 | |
7341 | if (mddev->layout != info->layout) { | |
7342 | /* Change layout | |
7343 | * we don't need to do anything at the md level, the | |
7344 | * personality will take care of it all. | |
7345 | */ | |
50ac168a | 7346 | if (mddev->pers->check_reshape == NULL) |
1da177e4 | 7347 | return -EINVAL; |
597a711b N |
7348 | else { |
7349 | mddev->new_layout = info->layout; | |
50ac168a | 7350 | rv = mddev->pers->check_reshape(mddev); |
597a711b N |
7351 | if (rv) |
7352 | mddev->new_layout = mddev->layout; | |
7353 | return rv; | |
7354 | } | |
1da177e4 | 7355 | } |
58c0fed4 | 7356 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
d71f9f88 | 7357 | rv = update_size(mddev, (sector_t)info->size * 2); |
a35b0d69 | 7358 | |
da943b99 N |
7359 | if (mddev->raid_disks != info->raid_disks) |
7360 | rv = update_raid_disks(mddev, info->raid_disks); | |
7361 | ||
36fa3063 | 7362 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) { |
293467aa GR |
7363 | if (mddev->pers->quiesce == NULL || mddev->thread == NULL) { |
7364 | rv = -EINVAL; | |
7365 | goto err; | |
7366 | } | |
7367 | if (mddev->recovery || mddev->sync_thread) { | |
7368 | rv = -EBUSY; | |
7369 | goto err; | |
7370 | } | |
36fa3063 | 7371 | if (info->state & (1<<MD_SB_BITMAP_PRESENT)) { |
f9209a32 | 7372 | struct bitmap *bitmap; |
36fa3063 | 7373 | /* add the bitmap */ |
293467aa GR |
7374 | if (mddev->bitmap) { |
7375 | rv = -EEXIST; | |
7376 | goto err; | |
7377 | } | |
7378 | if (mddev->bitmap_info.default_offset == 0) { | |
7379 | rv = -EINVAL; | |
7380 | goto err; | |
7381 | } | |
c3d9714e N |
7382 | mddev->bitmap_info.offset = |
7383 | mddev->bitmap_info.default_offset; | |
6409bb05 N |
7384 | mddev->bitmap_info.space = |
7385 | mddev->bitmap_info.default_space; | |
e64e4018 | 7386 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7387 | mddev_suspend(mddev); |
f9209a32 GR |
7388 | if (!IS_ERR(bitmap)) { |
7389 | mddev->bitmap = bitmap; | |
e64e4018 | 7390 | rv = md_bitmap_load(mddev); |
ba599aca N |
7391 | } else |
7392 | rv = PTR_ERR(bitmap); | |
36fa3063 | 7393 | if (rv) |
e64e4018 | 7394 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7395 | mddev_resume(mddev); |
36fa3063 N |
7396 | } else { |
7397 | /* remove the bitmap */ | |
293467aa GR |
7398 | if (!mddev->bitmap) { |
7399 | rv = -ENOENT; | |
7400 | goto err; | |
7401 | } | |
7402 | if (mddev->bitmap->storage.file) { | |
7403 | rv = -EINVAL; | |
7404 | goto err; | |
7405 | } | |
f6a2dc64 GJ |
7406 | if (mddev->bitmap_info.nodes) { |
7407 | /* hold PW on all the bitmap lock */ | |
7408 | if (md_cluster_ops->lock_all_bitmaps(mddev) <= 0) { | |
9d48739e | 7409 | pr_warn("md: can't change bitmap to none since the array is in use by more than one node\n"); |
f6a2dc64 GJ |
7410 | rv = -EPERM; |
7411 | md_cluster_ops->unlock_all_bitmaps(mddev); | |
7412 | goto err; | |
7413 | } | |
7414 | ||
7415 | mddev->bitmap_info.nodes = 0; | |
7416 | md_cluster_ops->leave(mddev); | |
edee9dfe | 7417 | module_put(md_cluster_mod); |
7c9d5c54 | 7418 | mddev->safemode_delay = DEFAULT_SAFEMODE_DELAY; |
f6a2dc64 | 7419 | } |
9e1cc0a5 | 7420 | mddev_suspend(mddev); |
e64e4018 | 7421 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7422 | mddev_resume(mddev); |
c3d9714e | 7423 | mddev->bitmap_info.offset = 0; |
36fa3063 N |
7424 | } |
7425 | } | |
850b2b42 | 7426 | md_update_sb(mddev, 1); |
293467aa GR |
7427 | return rv; |
7428 | err: | |
1da177e4 LT |
7429 | return rv; |
7430 | } | |
7431 | ||
fd01b88c | 7432 | static int set_disk_faulty(struct mddev *mddev, dev_t dev) |
1da177e4 | 7433 | { |
3cb03002 | 7434 | struct md_rdev *rdev; |
1ca69c4b | 7435 | int err = 0; |
1da177e4 LT |
7436 | |
7437 | if (mddev->pers == NULL) | |
7438 | return -ENODEV; | |
7439 | ||
1ca69c4b | 7440 | rcu_read_lock(); |
1532d9e8 | 7441 | rdev = md_find_rdev_rcu(mddev, dev); |
1da177e4 | 7442 | if (!rdev) |
1ca69c4b N |
7443 | err = -ENODEV; |
7444 | else { | |
7445 | md_error(mddev, rdev); | |
7446 | if (!test_bit(Faulty, &rdev->flags)) | |
7447 | err = -EBUSY; | |
7448 | } | |
7449 | rcu_read_unlock(); | |
7450 | return err; | |
1da177e4 LT |
7451 | } |
7452 | ||
2f9618ce AN |
7453 | /* |
7454 | * We have a problem here : there is no easy way to give a CHS | |
7455 | * virtual geometry. We currently pretend that we have a 2 heads | |
7456 | * 4 sectors (with a BIG number of cylinders...). This drives | |
7457 | * dosfs just mad... ;-) | |
7458 | */ | |
a885c8c4 CH |
7459 | static int md_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
7460 | { | |
fd01b88c | 7461 | struct mddev *mddev = bdev->bd_disk->private_data; |
a885c8c4 CH |
7462 | |
7463 | geo->heads = 2; | |
7464 | geo->sectors = 4; | |
49ce6cea | 7465 | geo->cylinders = mddev->array_sectors / 8; |
a885c8c4 CH |
7466 | return 0; |
7467 | } | |
7468 | ||
cb335f88 NS |
7469 | static inline bool md_ioctl_valid(unsigned int cmd) |
7470 | { | |
7471 | switch (cmd) { | |
7472 | case ADD_NEW_DISK: | |
cb335f88 NS |
7473 | case GET_ARRAY_INFO: |
7474 | case GET_BITMAP_FILE: | |
7475 | case GET_DISK_INFO: | |
7476 | case HOT_ADD_DISK: | |
7477 | case HOT_REMOVE_DISK: | |
cb335f88 NS |
7478 | case RAID_VERSION: |
7479 | case RESTART_ARRAY_RW: | |
7480 | case RUN_ARRAY: | |
7481 | case SET_ARRAY_INFO: | |
7482 | case SET_BITMAP_FILE: | |
7483 | case SET_DISK_FAULTY: | |
7484 | case STOP_ARRAY: | |
7485 | case STOP_ARRAY_RO: | |
1aee41f6 | 7486 | case CLUSTERED_DISK_NACK: |
cb335f88 NS |
7487 | return true; |
7488 | default: | |
7489 | return false; | |
7490 | } | |
7491 | } | |
7492 | ||
a39907fa | 7493 | static int md_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
7494 | unsigned int cmd, unsigned long arg) |
7495 | { | |
7496 | int err = 0; | |
7497 | void __user *argp = (void __user *)arg; | |
fd01b88c | 7498 | struct mddev *mddev = NULL; |
065e519e | 7499 | bool did_set_md_closing = false; |
1da177e4 | 7500 | |
cb335f88 NS |
7501 | if (!md_ioctl_valid(cmd)) |
7502 | return -ENOTTY; | |
7503 | ||
506c9e44 N |
7504 | switch (cmd) { |
7505 | case RAID_VERSION: | |
7506 | case GET_ARRAY_INFO: | |
7507 | case GET_DISK_INFO: | |
7508 | break; | |
7509 | default: | |
7510 | if (!capable(CAP_SYS_ADMIN)) | |
7511 | return -EACCES; | |
7512 | } | |
1da177e4 LT |
7513 | |
7514 | /* | |
7515 | * Commands dealing with the RAID driver but not any | |
7516 | * particular array: | |
7517 | */ | |
c02c0aeb N |
7518 | switch (cmd) { |
7519 | case RAID_VERSION: | |
7520 | err = get_version(argp); | |
3adc28d8 | 7521 | goto out; |
c02c0aeb | 7522 | default:; |
1da177e4 LT |
7523 | } |
7524 | ||
7525 | /* | |
7526 | * Commands creating/starting a new array: | |
7527 | */ | |
7528 | ||
a39907fa | 7529 | mddev = bdev->bd_disk->private_data; |
1da177e4 LT |
7530 | |
7531 | if (!mddev) { | |
7532 | BUG(); | |
3adc28d8 | 7533 | goto out; |
1da177e4 LT |
7534 | } |
7535 | ||
1ca69c4b N |
7536 | /* Some actions do not requires the mutex */ |
7537 | switch (cmd) { | |
7538 | case GET_ARRAY_INFO: | |
7539 | if (!mddev->raid_disks && !mddev->external) | |
7540 | err = -ENODEV; | |
7541 | else | |
7542 | err = get_array_info(mddev, argp); | |
3adc28d8 | 7543 | goto out; |
1ca69c4b N |
7544 | |
7545 | case GET_DISK_INFO: | |
7546 | if (!mddev->raid_disks && !mddev->external) | |
7547 | err = -ENODEV; | |
7548 | else | |
7549 | err = get_disk_info(mddev, argp); | |
3adc28d8 | 7550 | goto out; |
1ca69c4b N |
7551 | |
7552 | case SET_DISK_FAULTY: | |
7553 | err = set_disk_faulty(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7554 | goto out; |
4af1a041 N |
7555 | |
7556 | case GET_BITMAP_FILE: | |
7557 | err = get_bitmap_file(mddev, argp); | |
7558 | goto out; | |
7559 | ||
1ca69c4b N |
7560 | } |
7561 | ||
78b990cf | 7562 | if (cmd == ADD_NEW_DISK || cmd == HOT_ADD_DISK) |
cc1ffe61 | 7563 | flush_rdev_wq(mddev); |
a7a3f08d | 7564 | |
90f5f7ad HR |
7565 | if (cmd == HOT_REMOVE_DISK) |
7566 | /* need to ensure recovery thread has run */ | |
7567 | wait_event_interruptible_timeout(mddev->sb_wait, | |
7568 | !test_bit(MD_RECOVERY_NEEDED, | |
82a301cb | 7569 | &mddev->recovery), |
90f5f7ad | 7570 | msecs_to_jiffies(5000)); |
260fa034 N |
7571 | if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) { |
7572 | /* Need to flush page cache, and ensure no-one else opens | |
7573 | * and writes | |
7574 | */ | |
7575 | mutex_lock(&mddev->open_mutex); | |
9ba3b7f5 | 7576 | if (mddev->pers && atomic_read(&mddev->openers) > 1) { |
260fa034 N |
7577 | mutex_unlock(&mddev->open_mutex); |
7578 | err = -EBUSY; | |
3adc28d8 | 7579 | goto out; |
260fa034 | 7580 | } |
c731b84b DJ |
7581 | if (test_and_set_bit(MD_CLOSING, &mddev->flags)) { |
7582 | mutex_unlock(&mddev->open_mutex); | |
7583 | err = -EBUSY; | |
7584 | goto out; | |
7585 | } | |
065e519e | 7586 | did_set_md_closing = true; |
260fa034 N |
7587 | mutex_unlock(&mddev->open_mutex); |
7588 | sync_blockdev(bdev); | |
7589 | } | |
1da177e4 LT |
7590 | err = mddev_lock(mddev); |
7591 | if (err) { | |
9d48739e N |
7592 | pr_debug("md: ioctl lock interrupted, reason %d, cmd %d\n", |
7593 | err, cmd); | |
3adc28d8 | 7594 | goto out; |
1da177e4 LT |
7595 | } |
7596 | ||
c02c0aeb N |
7597 | if (cmd == SET_ARRAY_INFO) { |
7598 | mdu_array_info_t info; | |
7599 | if (!arg) | |
7600 | memset(&info, 0, sizeof(info)); | |
7601 | else if (copy_from_user(&info, argp, sizeof(info))) { | |
7602 | err = -EFAULT; | |
3adc28d8 | 7603 | goto unlock; |
c02c0aeb N |
7604 | } |
7605 | if (mddev->pers) { | |
7606 | err = update_array_info(mddev, &info); | |
7607 | if (err) { | |
9d48739e | 7608 | pr_warn("md: couldn't update array info. %d\n", err); |
3adc28d8 | 7609 | goto unlock; |
1da177e4 | 7610 | } |
3adc28d8 | 7611 | goto unlock; |
c02c0aeb N |
7612 | } |
7613 | if (!list_empty(&mddev->disks)) { | |
9d48739e | 7614 | pr_warn("md: array %s already has disks!\n", mdname(mddev)); |
c02c0aeb | 7615 | err = -EBUSY; |
3adc28d8 | 7616 | goto unlock; |
c02c0aeb N |
7617 | } |
7618 | if (mddev->raid_disks) { | |
9d48739e | 7619 | pr_warn("md: array %s already initialised!\n", mdname(mddev)); |
c02c0aeb | 7620 | err = -EBUSY; |
3adc28d8 | 7621 | goto unlock; |
c02c0aeb | 7622 | } |
7e0adbfc | 7623 | err = md_set_array_info(mddev, &info); |
c02c0aeb | 7624 | if (err) { |
9d48739e | 7625 | pr_warn("md: couldn't set array info. %d\n", err); |
3adc28d8 | 7626 | goto unlock; |
c02c0aeb | 7627 | } |
3adc28d8 | 7628 | goto unlock; |
1da177e4 LT |
7629 | } |
7630 | ||
7631 | /* | |
7632 | * Commands querying/configuring an existing array: | |
7633 | */ | |
32a7627c | 7634 | /* if we are not initialised yet, only ADD_NEW_DISK, STOP_ARRAY, |
3f9d7b0d | 7635 | * RUN_ARRAY, and GET_ and SET_BITMAP_FILE are allowed */ |
a17184a9 N |
7636 | if ((!mddev->raid_disks && !mddev->external) |
7637 | && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY | |
7638 | && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE | |
7639 | && cmd != GET_BITMAP_FILE) { | |
1da177e4 | 7640 | err = -ENODEV; |
3adc28d8 | 7641 | goto unlock; |
1da177e4 LT |
7642 | } |
7643 | ||
7644 | /* | |
7645 | * Commands even a read-only array can execute: | |
7646 | */ | |
c02c0aeb | 7647 | switch (cmd) { |
c02c0aeb N |
7648 | case RESTART_ARRAY_RW: |
7649 | err = restart_array(mddev); | |
3adc28d8 | 7650 | goto unlock; |
1da177e4 | 7651 | |
c02c0aeb N |
7652 | case STOP_ARRAY: |
7653 | err = do_md_stop(mddev, 0, bdev); | |
3adc28d8 | 7654 | goto unlock; |
1da177e4 | 7655 | |
c02c0aeb N |
7656 | case STOP_ARRAY_RO: |
7657 | err = md_set_readonly(mddev, bdev); | |
3adc28d8 | 7658 | goto unlock; |
1da177e4 | 7659 | |
3ea8929d N |
7660 | case HOT_REMOVE_DISK: |
7661 | err = hot_remove_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7662 | goto unlock; |
3ea8929d | 7663 | |
7ceb17e8 N |
7664 | case ADD_NEW_DISK: |
7665 | /* We can support ADD_NEW_DISK on read-only arrays | |
466ad292 | 7666 | * only if we are re-adding a preexisting device. |
7ceb17e8 N |
7667 | * So require mddev->pers and MD_DISK_SYNC. |
7668 | */ | |
7669 | if (mddev->pers) { | |
7670 | mdu_disk_info_t info; | |
7671 | if (copy_from_user(&info, argp, sizeof(info))) | |
7672 | err = -EFAULT; | |
7673 | else if (!(info.state & (1<<MD_DISK_SYNC))) | |
7674 | /* Need to clear read-only for this */ | |
7675 | break; | |
7676 | else | |
7e0adbfc | 7677 | err = md_add_new_disk(mddev, &info); |
3adc28d8 | 7678 | goto unlock; |
7ceb17e8 N |
7679 | } |
7680 | break; | |
1da177e4 LT |
7681 | } |
7682 | ||
7683 | /* | |
7684 | * The remaining ioctls are changing the state of the | |
f91de92e | 7685 | * superblock, so we do not allow them on read-only arrays. |
1da177e4 | 7686 | */ |
326eb17d | 7687 | if (mddev->ro && mddev->pers) { |
f91de92e N |
7688 | if (mddev->ro == 2) { |
7689 | mddev->ro = 0; | |
00bcb4ac | 7690 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 7691 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f3378b48 N |
7692 | /* mddev_unlock will wake thread */ |
7693 | /* If a device failed while we were read-only, we | |
7694 | * need to make sure the metadata is updated now. | |
7695 | */ | |
2953079c | 7696 | if (test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) { |
f3378b48 N |
7697 | mddev_unlock(mddev); |
7698 | wait_event(mddev->sb_wait, | |
2953079c SL |
7699 | !test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags) && |
7700 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); | |
29f097c4 | 7701 | mddev_lock_nointr(mddev); |
f3378b48 | 7702 | } |
f91de92e N |
7703 | } else { |
7704 | err = -EROFS; | |
3adc28d8 | 7705 | goto unlock; |
f91de92e | 7706 | } |
1da177e4 LT |
7707 | } |
7708 | ||
c02c0aeb N |
7709 | switch (cmd) { |
7710 | case ADD_NEW_DISK: | |
1da177e4 | 7711 | { |
c02c0aeb N |
7712 | mdu_disk_info_t info; |
7713 | if (copy_from_user(&info, argp, sizeof(info))) | |
7714 | err = -EFAULT; | |
7715 | else | |
7e0adbfc | 7716 | err = md_add_new_disk(mddev, &info); |
3adc28d8 | 7717 | goto unlock; |
c02c0aeb | 7718 | } |
1da177e4 | 7719 | |
1aee41f6 GR |
7720 | case CLUSTERED_DISK_NACK: |
7721 | if (mddev_is_clustered(mddev)) | |
7722 | md_cluster_ops->new_disk_ack(mddev, false); | |
7723 | else | |
7724 | err = -EINVAL; | |
7725 | goto unlock; | |
7726 | ||
c02c0aeb N |
7727 | case HOT_ADD_DISK: |
7728 | err = hot_add_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7729 | goto unlock; |
1da177e4 | 7730 | |
c02c0aeb N |
7731 | case RUN_ARRAY: |
7732 | err = do_md_run(mddev); | |
3adc28d8 | 7733 | goto unlock; |
1da177e4 | 7734 | |
c02c0aeb N |
7735 | case SET_BITMAP_FILE: |
7736 | err = set_bitmap_file(mddev, (int)arg); | |
3adc28d8 | 7737 | goto unlock; |
32a7627c | 7738 | |
c02c0aeb N |
7739 | default: |
7740 | err = -EINVAL; | |
3adc28d8 | 7741 | goto unlock; |
1da177e4 LT |
7742 | } |
7743 | ||
3adc28d8 | 7744 | unlock: |
d3374825 N |
7745 | if (mddev->hold_active == UNTIL_IOCTL && |
7746 | err != -EINVAL) | |
7747 | mddev->hold_active = 0; | |
1da177e4 | 7748 | mddev_unlock(mddev); |
3adc28d8 | 7749 | out: |
065e519e N |
7750 | if(did_set_md_closing) |
7751 | clear_bit(MD_CLOSING, &mddev->flags); | |
1da177e4 LT |
7752 | return err; |
7753 | } | |
aa98aa31 AB |
7754 | #ifdef CONFIG_COMPAT |
7755 | static int md_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
7756 | unsigned int cmd, unsigned long arg) | |
7757 | { | |
7758 | switch (cmd) { | |
7759 | case HOT_REMOVE_DISK: | |
7760 | case HOT_ADD_DISK: | |
7761 | case SET_DISK_FAULTY: | |
7762 | case SET_BITMAP_FILE: | |
7763 | /* These take in integer arg, do not convert */ | |
7764 | break; | |
7765 | default: | |
7766 | arg = (unsigned long)compat_ptr(arg); | |
7767 | break; | |
7768 | } | |
7769 | ||
7770 | return md_ioctl(bdev, mode, cmd, arg); | |
7771 | } | |
7772 | #endif /* CONFIG_COMPAT */ | |
1da177e4 | 7773 | |
118cf084 CH |
7774 | static int md_set_read_only(struct block_device *bdev, bool ro) |
7775 | { | |
7776 | struct mddev *mddev = bdev->bd_disk->private_data; | |
7777 | int err; | |
7778 | ||
7779 | err = mddev_lock(mddev); | |
7780 | if (err) | |
7781 | return err; | |
7782 | ||
7783 | if (!mddev->raid_disks && !mddev->external) { | |
7784 | err = -ENODEV; | |
7785 | goto out_unlock; | |
7786 | } | |
7787 | ||
7788 | /* | |
7789 | * Transitioning to read-auto need only happen for arrays that call | |
7790 | * md_write_start and which are not ready for writes yet. | |
7791 | */ | |
7792 | if (!ro && mddev->ro == 1 && mddev->pers) { | |
7793 | err = restart_array(mddev); | |
7794 | if (err) | |
7795 | goto out_unlock; | |
7796 | mddev->ro = 2; | |
7797 | } | |
7798 | ||
7799 | out_unlock: | |
7800 | mddev_unlock(mddev); | |
7801 | return err; | |
7802 | } | |
7803 | ||
a39907fa | 7804 | static int md_open(struct block_device *bdev, fmode_t mode) |
1da177e4 LT |
7805 | { |
7806 | /* | |
7807 | * Succeed if we can lock the mddev, which confirms that | |
7808 | * it isn't being stopped right now. | |
7809 | */ | |
fd01b88c | 7810 | struct mddev *mddev = mddev_find(bdev->bd_dev); |
1da177e4 LT |
7811 | int err; |
7812 | ||
0c098220 YL |
7813 | if (!mddev) |
7814 | return -ENODEV; | |
7815 | ||
d3374825 N |
7816 | if (mddev->gendisk != bdev->bd_disk) { |
7817 | /* we are racing with mddev_put which is discarding this | |
7818 | * bd_disk. | |
7819 | */ | |
7820 | mddev_put(mddev); | |
7821 | /* Wait until bdev->bd_disk is definitely gone */ | |
f6766ff6 GJ |
7822 | if (work_pending(&mddev->del_work)) |
7823 | flush_workqueue(md_misc_wq); | |
d3374825 N |
7824 | /* Then retry the open from the top */ |
7825 | return -ERESTARTSYS; | |
7826 | } | |
7827 | BUG_ON(mddev != bdev->bd_disk->private_data); | |
7828 | ||
c8c00a69 | 7829 | if ((err = mutex_lock_interruptible(&mddev->open_mutex))) |
1da177e4 LT |
7830 | goto out; |
7831 | ||
af8d8e6f GJ |
7832 | if (test_bit(MD_CLOSING, &mddev->flags)) { |
7833 | mutex_unlock(&mddev->open_mutex); | |
e2342ca8 N |
7834 | err = -ENODEV; |
7835 | goto out; | |
af8d8e6f GJ |
7836 | } |
7837 | ||
1da177e4 | 7838 | err = 0; |
f2ea68cf | 7839 | atomic_inc(&mddev->openers); |
c8c00a69 | 7840 | mutex_unlock(&mddev->open_mutex); |
1da177e4 | 7841 | |
818077d6 | 7842 | bdev_check_media_change(bdev); |
1da177e4 | 7843 | out: |
e2342ca8 N |
7844 | if (err) |
7845 | mddev_put(mddev); | |
1da177e4 LT |
7846 | return err; |
7847 | } | |
7848 | ||
db2a144b | 7849 | static void md_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 7850 | { |
f72ffdd6 | 7851 | struct mddev *mddev = disk->private_data; |
1da177e4 | 7852 | |
52e5f9d1 | 7853 | BUG_ON(!mddev); |
f2ea68cf | 7854 | atomic_dec(&mddev->openers); |
1da177e4 | 7855 | mddev_put(mddev); |
1da177e4 | 7856 | } |
f0b4f7e2 | 7857 | |
a564e23f | 7858 | static unsigned int md_check_events(struct gendisk *disk, unsigned int clearing) |
f0b4f7e2 | 7859 | { |
fd01b88c | 7860 | struct mddev *mddev = disk->private_data; |
a564e23f | 7861 | unsigned int ret = 0; |
f0b4f7e2 | 7862 | |
a564e23f CH |
7863 | if (mddev->changed) |
7864 | ret = DISK_EVENT_MEDIA_CHANGE; | |
f0b4f7e2 | 7865 | mddev->changed = 0; |
a564e23f | 7866 | return ret; |
f0b4f7e2 | 7867 | } |
a564e23f | 7868 | |
7e0adbfc | 7869 | const struct block_device_operations md_fops = |
1da177e4 LT |
7870 | { |
7871 | .owner = THIS_MODULE, | |
c62b37d9 | 7872 | .submit_bio = md_submit_bio, |
a39907fa AV |
7873 | .open = md_open, |
7874 | .release = md_release, | |
b492b852 | 7875 | .ioctl = md_ioctl, |
aa98aa31 AB |
7876 | #ifdef CONFIG_COMPAT |
7877 | .compat_ioctl = md_compat_ioctl, | |
7878 | #endif | |
a885c8c4 | 7879 | .getgeo = md_getgeo, |
a564e23f | 7880 | .check_events = md_check_events, |
118cf084 | 7881 | .set_read_only = md_set_read_only, |
1da177e4 LT |
7882 | }; |
7883 | ||
f72ffdd6 | 7884 | static int md_thread(void *arg) |
1da177e4 | 7885 | { |
2b8bf345 | 7886 | struct md_thread *thread = arg; |
1da177e4 | 7887 | |
1da177e4 LT |
7888 | /* |
7889 | * md_thread is a 'system-thread', it's priority should be very | |
7890 | * high. We avoid resource deadlocks individually in each | |
7891 | * raid personality. (RAID5 does preallocation) We also use RR and | |
7892 | * the very same RT priority as kswapd, thus we will never get | |
7893 | * into a priority inversion deadlock. | |
7894 | * | |
7895 | * we definitely have to have equal or higher priority than | |
7896 | * bdflush, otherwise bdflush will deadlock if there are too | |
7897 | * many dirty RAID5 blocks. | |
7898 | */ | |
1da177e4 | 7899 | |
6985c43f | 7900 | allow_signal(SIGKILL); |
a6fb0934 | 7901 | while (!kthread_should_stop()) { |
1da177e4 | 7902 | |
93588e22 N |
7903 | /* We need to wait INTERRUPTIBLE so that |
7904 | * we don't add to the load-average. | |
7905 | * That means we need to be sure no signals are | |
7906 | * pending | |
7907 | */ | |
7908 | if (signal_pending(current)) | |
7909 | flush_signals(current); | |
7910 | ||
7911 | wait_event_interruptible_timeout | |
7912 | (thread->wqueue, | |
7913 | test_bit(THREAD_WAKEUP, &thread->flags) | |
ce1ccd07 | 7914 | || kthread_should_stop() || kthread_should_park(), |
93588e22 | 7915 | thread->timeout); |
1da177e4 | 7916 | |
6c987910 | 7917 | clear_bit(THREAD_WAKEUP, &thread->flags); |
ce1ccd07 SL |
7918 | if (kthread_should_park()) |
7919 | kthread_parkme(); | |
6c987910 | 7920 | if (!kthread_should_stop()) |
4ed8731d | 7921 | thread->run(thread); |
1da177e4 | 7922 | } |
a6fb0934 | 7923 | |
1da177e4 LT |
7924 | return 0; |
7925 | } | |
7926 | ||
2b8bf345 | 7927 | void md_wakeup_thread(struct md_thread *thread) |
1da177e4 LT |
7928 | { |
7929 | if (thread) { | |
36a4e1fe | 7930 | pr_debug("md: waking up MD thread %s.\n", thread->tsk->comm); |
d1d90147 GJ |
7931 | set_bit(THREAD_WAKEUP, &thread->flags); |
7932 | wake_up(&thread->wqueue); | |
1da177e4 LT |
7933 | } |
7934 | } | |
6c144d31 | 7935 | EXPORT_SYMBOL(md_wakeup_thread); |
1da177e4 | 7936 | |
4ed8731d SL |
7937 | struct md_thread *md_register_thread(void (*run) (struct md_thread *), |
7938 | struct mddev *mddev, const char *name) | |
1da177e4 | 7939 | { |
2b8bf345 | 7940 | struct md_thread *thread; |
1da177e4 | 7941 | |
2b8bf345 | 7942 | thread = kzalloc(sizeof(struct md_thread), GFP_KERNEL); |
1da177e4 LT |
7943 | if (!thread) |
7944 | return NULL; | |
7945 | ||
1da177e4 LT |
7946 | init_waitqueue_head(&thread->wqueue); |
7947 | ||
1da177e4 LT |
7948 | thread->run = run; |
7949 | thread->mddev = mddev; | |
32a7627c | 7950 | thread->timeout = MAX_SCHEDULE_TIMEOUT; |
0da3c619 N |
7951 | thread->tsk = kthread_run(md_thread, thread, |
7952 | "%s_%s", | |
7953 | mdname(thread->mddev), | |
0232605d | 7954 | name); |
a6fb0934 | 7955 | if (IS_ERR(thread->tsk)) { |
1da177e4 LT |
7956 | kfree(thread); |
7957 | return NULL; | |
7958 | } | |
1da177e4 LT |
7959 | return thread; |
7960 | } | |
6c144d31 | 7961 | EXPORT_SYMBOL(md_register_thread); |
1da177e4 | 7962 | |
2b8bf345 | 7963 | void md_unregister_thread(struct md_thread **threadp) |
1da177e4 | 7964 | { |
2b8bf345 | 7965 | struct md_thread *thread = *threadp; |
e0cf8f04 N |
7966 | if (!thread) |
7967 | return; | |
36a4e1fe | 7968 | pr_debug("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk)); |
01f96c0a N |
7969 | /* Locking ensures that mddev_unlock does not wake_up a |
7970 | * non-existent thread | |
7971 | */ | |
7972 | spin_lock(&pers_lock); | |
7973 | *threadp = NULL; | |
7974 | spin_unlock(&pers_lock); | |
a6fb0934 N |
7975 | |
7976 | kthread_stop(thread->tsk); | |
1da177e4 LT |
7977 | kfree(thread); |
7978 | } | |
6c144d31 | 7979 | EXPORT_SYMBOL(md_unregister_thread); |
1da177e4 | 7980 | |
fd01b88c | 7981 | void md_error(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 7982 | { |
b2d444d7 | 7983 | if (!rdev || test_bit(Faulty, &rdev->flags)) |
1da177e4 | 7984 | return; |
6bfe0b49 | 7985 | |
de393cde | 7986 | if (!mddev->pers || !mddev->pers->error_handler) |
1da177e4 LT |
7987 | return; |
7988 | mddev->pers->error_handler(mddev,rdev); | |
72a23c21 NB |
7989 | if (mddev->degraded) |
7990 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
00bcb4ac | 7991 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
7992 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
7993 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7994 | md_wakeup_thread(mddev->thread); | |
768a418d | 7995 | if (mddev->event_work.func) |
e804ac78 | 7996 | queue_work(md_misc_wq, &mddev->event_work); |
bb9ef716 | 7997 | md_new_event(mddev); |
1da177e4 | 7998 | } |
6c144d31 | 7999 | EXPORT_SYMBOL(md_error); |
1da177e4 LT |
8000 | |
8001 | /* seq_file implementation /proc/mdstat */ | |
8002 | ||
8003 | static void status_unused(struct seq_file *seq) | |
8004 | { | |
8005 | int i = 0; | |
3cb03002 | 8006 | struct md_rdev *rdev; |
1da177e4 LT |
8007 | |
8008 | seq_printf(seq, "unused devices: "); | |
8009 | ||
159ec1fc | 8010 | list_for_each_entry(rdev, &pending_raid_disks, same_set) { |
1da177e4 LT |
8011 | char b[BDEVNAME_SIZE]; |
8012 | i++; | |
8013 | seq_printf(seq, "%s ", | |
8014 | bdevname(rdev->bdev,b)); | |
8015 | } | |
8016 | if (!i) | |
8017 | seq_printf(seq, "<none>"); | |
8018 | ||
8019 | seq_printf(seq, "\n"); | |
8020 | } | |
8021 | ||
f7851be7 | 8022 | static int status_resync(struct seq_file *seq, struct mddev *mddev) |
1da177e4 | 8023 | { |
dd71cf6b | 8024 | sector_t max_sectors, resync, res; |
9642fa73 MT |
8025 | unsigned long dt, db = 0; |
8026 | sector_t rt, curr_mark_cnt, resync_mark_cnt; | |
8027 | int scale, recovery_active; | |
4588b42e | 8028 | unsigned int per_milli; |
1da177e4 | 8029 | |
c804cdec N |
8030 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8031 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
dd71cf6b | 8032 | max_sectors = mddev->resync_max_sectors; |
1da177e4 | 8033 | else |
dd71cf6b | 8034 | max_sectors = mddev->dev_sectors; |
1da177e4 | 8035 | |
f7851be7 N |
8036 | resync = mddev->curr_resync; |
8037 | if (resync <= 3) { | |
8038 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) | |
8039 | /* Still cleaning up */ | |
8040 | resync = max_sectors; | |
d2e2ec82 ND |
8041 | } else if (resync > max_sectors) |
8042 | resync = max_sectors; | |
8043 | else | |
f7851be7 N |
8044 | resync -= atomic_read(&mddev->recovery_active); |
8045 | ||
8046 | if (resync == 0) { | |
0357ba27 GJ |
8047 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery)) { |
8048 | struct md_rdev *rdev; | |
8049 | ||
8050 | rdev_for_each(rdev, mddev) | |
8051 | if (rdev->raid_disk >= 0 && | |
8052 | !test_bit(Faulty, &rdev->flags) && | |
8053 | rdev->recovery_offset != MaxSector && | |
8054 | rdev->recovery_offset) { | |
8055 | seq_printf(seq, "\trecover=REMOTE"); | |
8056 | return 1; | |
8057 | } | |
8058 | if (mddev->reshape_position != MaxSector) | |
8059 | seq_printf(seq, "\treshape=REMOTE"); | |
8060 | else | |
8061 | seq_printf(seq, "\tresync=REMOTE"); | |
8062 | return 1; | |
8063 | } | |
f7851be7 N |
8064 | if (mddev->recovery_cp < MaxSector) { |
8065 | seq_printf(seq, "\tresync=PENDING"); | |
8066 | return 1; | |
8067 | } | |
8068 | return 0; | |
8069 | } | |
8070 | if (resync < 3) { | |
8071 | seq_printf(seq, "\tresync=DELAYED"); | |
8072 | return 1; | |
8073 | } | |
8074 | ||
403df478 | 8075 | WARN_ON(max_sectors == 0); |
4588b42e | 8076 | /* Pick 'scale' such that (resync>>scale)*1000 will fit |
dd71cf6b | 8077 | * in a sector_t, and (max_sectors>>scale) will fit in a |
4588b42e N |
8078 | * u32, as those are the requirements for sector_div. |
8079 | * Thus 'scale' must be at least 10 | |
8080 | */ | |
8081 | scale = 10; | |
8082 | if (sizeof(sector_t) > sizeof(unsigned long)) { | |
dd71cf6b | 8083 | while ( max_sectors/2 > (1ULL<<(scale+32))) |
4588b42e N |
8084 | scale++; |
8085 | } | |
8086 | res = (resync>>scale)*1000; | |
dd71cf6b | 8087 | sector_div(res, (u32)((max_sectors>>scale)+1)); |
4588b42e N |
8088 | |
8089 | per_milli = res; | |
1da177e4 | 8090 | { |
4588b42e | 8091 | int i, x = per_milli/50, y = 20-x; |
1da177e4 LT |
8092 | seq_printf(seq, "["); |
8093 | for (i = 0; i < x; i++) | |
8094 | seq_printf(seq, "="); | |
8095 | seq_printf(seq, ">"); | |
8096 | for (i = 0; i < y; i++) | |
8097 | seq_printf(seq, "."); | |
8098 | seq_printf(seq, "] "); | |
8099 | } | |
4588b42e | 8100 | seq_printf(seq, " %s =%3u.%u%% (%llu/%llu)", |
ccfcc3c1 N |
8101 | (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)? |
8102 | "reshape" : | |
61df9d91 N |
8103 | (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)? |
8104 | "check" : | |
8105 | (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? | |
8106 | "resync" : "recovery"))), | |
8107 | per_milli/10, per_milli % 10, | |
dd71cf6b N |
8108 | (unsigned long long) resync/2, |
8109 | (unsigned long long) max_sectors/2); | |
1da177e4 LT |
8110 | |
8111 | /* | |
1da177e4 LT |
8112 | * dt: time from mark until now |
8113 | * db: blocks written from mark until now | |
8114 | * rt: remaining time | |
dd71cf6b | 8115 | * |
9642fa73 MT |
8116 | * rt is a sector_t, which is always 64bit now. We are keeping |
8117 | * the original algorithm, but it is not really necessary. | |
8118 | * | |
8119 | * Original algorithm: | |
8120 | * So we divide before multiply in case it is 32bit and close | |
8121 | * to the limit. | |
8122 | * We scale the divisor (db) by 32 to avoid losing precision | |
8123 | * near the end of resync when the number of remaining sectors | |
8124 | * is close to 'db'. | |
8125 | * We then divide rt by 32 after multiplying by db to compensate. | |
8126 | * The '+1' avoids division by zero if db is very small. | |
1da177e4 LT |
8127 | */ |
8128 | dt = ((jiffies - mddev->resync_mark) / HZ); | |
8129 | if (!dt) dt++; | |
9642fa73 MT |
8130 | |
8131 | curr_mark_cnt = mddev->curr_mark_cnt; | |
8132 | recovery_active = atomic_read(&mddev->recovery_active); | |
8133 | resync_mark_cnt = mddev->resync_mark_cnt; | |
8134 | ||
8135 | if (curr_mark_cnt >= (recovery_active + resync_mark_cnt)) | |
8136 | db = curr_mark_cnt - (recovery_active + resync_mark_cnt); | |
1da177e4 | 8137 | |
dd71cf6b | 8138 | rt = max_sectors - resync; /* number of remaining sectors */ |
9642fa73 | 8139 | rt = div64_u64(rt, db/32+1); |
dd71cf6b N |
8140 | rt *= dt; |
8141 | rt >>= 5; | |
8142 | ||
8143 | seq_printf(seq, " finish=%lu.%lumin", (unsigned long)rt / 60, | |
8144 | ((unsigned long)rt % 60)/6); | |
1da177e4 | 8145 | |
ff4e8d9a | 8146 | seq_printf(seq, " speed=%ldK/sec", db/2/dt); |
f7851be7 | 8147 | return 1; |
1da177e4 LT |
8148 | } |
8149 | ||
8150 | static void *md_seq_start(struct seq_file *seq, loff_t *pos) | |
8151 | { | |
8152 | struct list_head *tmp; | |
8153 | loff_t l = *pos; | |
fd01b88c | 8154 | struct mddev *mddev; |
1da177e4 | 8155 | |
7abfabaf JG |
8156 | if (l == 0x10000) { |
8157 | ++*pos; | |
8158 | return (void *)2; | |
8159 | } | |
8160 | if (l > 0x10000) | |
1da177e4 LT |
8161 | return NULL; |
8162 | if (!l--) | |
8163 | /* header */ | |
8164 | return (void*)1; | |
8165 | ||
8166 | spin_lock(&all_mddevs_lock); | |
8167 | list_for_each(tmp,&all_mddevs) | |
8168 | if (!l--) { | |
fd01b88c | 8169 | mddev = list_entry(tmp, struct mddev, all_mddevs); |
1da177e4 LT |
8170 | mddev_get(mddev); |
8171 | spin_unlock(&all_mddevs_lock); | |
8172 | return mddev; | |
8173 | } | |
8174 | spin_unlock(&all_mddevs_lock); | |
8175 | if (!l--) | |
8176 | return (void*)2;/* tail */ | |
8177 | return NULL; | |
8178 | } | |
8179 | ||
8180 | static void *md_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
8181 | { | |
8182 | struct list_head *tmp; | |
fd01b88c | 8183 | struct mddev *next_mddev, *mddev = v; |
f72ffdd6 | 8184 | |
1da177e4 LT |
8185 | ++*pos; |
8186 | if (v == (void*)2) | |
8187 | return NULL; | |
8188 | ||
8189 | spin_lock(&all_mddevs_lock); | |
8190 | if (v == (void*)1) | |
8191 | tmp = all_mddevs.next; | |
8192 | else | |
8193 | tmp = mddev->all_mddevs.next; | |
8194 | if (tmp != &all_mddevs) | |
fd01b88c | 8195 | next_mddev = mddev_get(list_entry(tmp,struct mddev,all_mddevs)); |
1da177e4 LT |
8196 | else { |
8197 | next_mddev = (void*)2; | |
8198 | *pos = 0x10000; | |
f72ffdd6 | 8199 | } |
1da177e4 LT |
8200 | spin_unlock(&all_mddevs_lock); |
8201 | ||
8202 | if (v != (void*)1) | |
8203 | mddev_put(mddev); | |
8204 | return next_mddev; | |
8205 | ||
8206 | } | |
8207 | ||
8208 | static void md_seq_stop(struct seq_file *seq, void *v) | |
8209 | { | |
fd01b88c | 8210 | struct mddev *mddev = v; |
1da177e4 LT |
8211 | |
8212 | if (mddev && v != (void*)1 && v != (void*)2) | |
8213 | mddev_put(mddev); | |
8214 | } | |
8215 | ||
8216 | static int md_seq_show(struct seq_file *seq, void *v) | |
8217 | { | |
fd01b88c | 8218 | struct mddev *mddev = v; |
dd8ac336 | 8219 | sector_t sectors; |
3cb03002 | 8220 | struct md_rdev *rdev; |
1da177e4 LT |
8221 | |
8222 | if (v == (void*)1) { | |
84fc4b56 | 8223 | struct md_personality *pers; |
1da177e4 LT |
8224 | seq_printf(seq, "Personalities : "); |
8225 | spin_lock(&pers_lock); | |
2604b703 N |
8226 | list_for_each_entry(pers, &pers_list, list) |
8227 | seq_printf(seq, "[%s] ", pers->name); | |
1da177e4 LT |
8228 | |
8229 | spin_unlock(&pers_lock); | |
8230 | seq_printf(seq, "\n"); | |
f1514638 | 8231 | seq->poll_event = atomic_read(&md_event_count); |
1da177e4 LT |
8232 | return 0; |
8233 | } | |
8234 | if (v == (void*)2) { | |
8235 | status_unused(seq); | |
8236 | return 0; | |
8237 | } | |
8238 | ||
36d091f4 | 8239 | spin_lock(&mddev->lock); |
1da177e4 LT |
8240 | if (mddev->pers || mddev->raid_disks || !list_empty(&mddev->disks)) { |
8241 | seq_printf(seq, "%s : %sactive", mdname(mddev), | |
8242 | mddev->pers ? "" : "in"); | |
8243 | if (mddev->pers) { | |
f91de92e | 8244 | if (mddev->ro==1) |
1da177e4 | 8245 | seq_printf(seq, " (read-only)"); |
f91de92e | 8246 | if (mddev->ro==2) |
52720ae7 | 8247 | seq_printf(seq, " (auto-read-only)"); |
1da177e4 LT |
8248 | seq_printf(seq, " %s", mddev->pers->name); |
8249 | } | |
8250 | ||
dd8ac336 | 8251 | sectors = 0; |
f97fcad3 N |
8252 | rcu_read_lock(); |
8253 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 LT |
8254 | char b[BDEVNAME_SIZE]; |
8255 | seq_printf(seq, " %s[%d]", | |
8256 | bdevname(rdev->bdev,b), rdev->desc_nr); | |
8ddf9efe N |
8257 | if (test_bit(WriteMostly, &rdev->flags)) |
8258 | seq_printf(seq, "(W)"); | |
9efdca16 SL |
8259 | if (test_bit(Journal, &rdev->flags)) |
8260 | seq_printf(seq, "(J)"); | |
b2d444d7 | 8261 | if (test_bit(Faulty, &rdev->flags)) { |
1da177e4 LT |
8262 | seq_printf(seq, "(F)"); |
8263 | continue; | |
2d78f8c4 N |
8264 | } |
8265 | if (rdev->raid_disk < 0) | |
b325a32e | 8266 | seq_printf(seq, "(S)"); /* spare */ |
2d78f8c4 N |
8267 | if (test_bit(Replacement, &rdev->flags)) |
8268 | seq_printf(seq, "(R)"); | |
dd8ac336 | 8269 | sectors += rdev->sectors; |
1da177e4 | 8270 | } |
f97fcad3 | 8271 | rcu_read_unlock(); |
1da177e4 LT |
8272 | |
8273 | if (!list_empty(&mddev->disks)) { | |
8274 | if (mddev->pers) | |
8275 | seq_printf(seq, "\n %llu blocks", | |
f233ea5c AN |
8276 | (unsigned long long) |
8277 | mddev->array_sectors / 2); | |
1da177e4 LT |
8278 | else |
8279 | seq_printf(seq, "\n %llu blocks", | |
dd8ac336 | 8280 | (unsigned long long)sectors / 2); |
1da177e4 | 8281 | } |
1cd6bf19 N |
8282 | if (mddev->persistent) { |
8283 | if (mddev->major_version != 0 || | |
8284 | mddev->minor_version != 90) { | |
8285 | seq_printf(seq," super %d.%d", | |
8286 | mddev->major_version, | |
8287 | mddev->minor_version); | |
8288 | } | |
e691063a N |
8289 | } else if (mddev->external) |
8290 | seq_printf(seq, " super external:%s", | |
8291 | mddev->metadata_type); | |
8292 | else | |
1cd6bf19 | 8293 | seq_printf(seq, " super non-persistent"); |
1da177e4 LT |
8294 | |
8295 | if (mddev->pers) { | |
d710e138 | 8296 | mddev->pers->status(seq, mddev); |
f72ffdd6 | 8297 | seq_printf(seq, "\n "); |
8e1b39d6 | 8298 | if (mddev->pers->sync_request) { |
f7851be7 | 8299 | if (status_resync(seq, mddev)) |
8e1b39d6 | 8300 | seq_printf(seq, "\n "); |
8e1b39d6 | 8301 | } |
32a7627c N |
8302 | } else |
8303 | seq_printf(seq, "\n "); | |
8304 | ||
e64e4018 | 8305 | md_bitmap_status(seq, mddev->bitmap); |
1da177e4 LT |
8306 | |
8307 | seq_printf(seq, "\n"); | |
8308 | } | |
36d091f4 | 8309 | spin_unlock(&mddev->lock); |
f72ffdd6 | 8310 | |
1da177e4 LT |
8311 | return 0; |
8312 | } | |
8313 | ||
110518bc | 8314 | static const struct seq_operations md_seq_ops = { |
1da177e4 LT |
8315 | .start = md_seq_start, |
8316 | .next = md_seq_next, | |
8317 | .stop = md_seq_stop, | |
8318 | .show = md_seq_show, | |
8319 | }; | |
8320 | ||
8321 | static int md_seq_open(struct inode *inode, struct file *file) | |
8322 | { | |
f1514638 | 8323 | struct seq_file *seq; |
1da177e4 LT |
8324 | int error; |
8325 | ||
8326 | error = seq_open(file, &md_seq_ops); | |
d7603b7e | 8327 | if (error) |
f1514638 KS |
8328 | return error; |
8329 | ||
8330 | seq = file->private_data; | |
8331 | seq->poll_event = atomic_read(&md_event_count); | |
1da177e4 LT |
8332 | return error; |
8333 | } | |
8334 | ||
e2f23b60 | 8335 | static int md_unloading; |
afc9a42b | 8336 | static __poll_t mdstat_poll(struct file *filp, poll_table *wait) |
d7603b7e | 8337 | { |
f1514638 | 8338 | struct seq_file *seq = filp->private_data; |
afc9a42b | 8339 | __poll_t mask; |
d7603b7e | 8340 | |
e2f23b60 | 8341 | if (md_unloading) |
a9a08845 | 8342 | return EPOLLIN|EPOLLRDNORM|EPOLLERR|EPOLLPRI; |
d7603b7e N |
8343 | poll_wait(filp, &md_event_waiters, wait); |
8344 | ||
8345 | /* always allow read */ | |
a9a08845 | 8346 | mask = EPOLLIN | EPOLLRDNORM; |
d7603b7e | 8347 | |
f1514638 | 8348 | if (seq->poll_event != atomic_read(&md_event_count)) |
a9a08845 | 8349 | mask |= EPOLLERR | EPOLLPRI; |
d7603b7e N |
8350 | return mask; |
8351 | } | |
8352 | ||
97a32539 AD |
8353 | static const struct proc_ops mdstat_proc_ops = { |
8354 | .proc_open = md_seq_open, | |
8355 | .proc_read = seq_read, | |
8356 | .proc_lseek = seq_lseek, | |
8357 | .proc_release = seq_release, | |
8358 | .proc_poll = mdstat_poll, | |
1da177e4 LT |
8359 | }; |
8360 | ||
84fc4b56 | 8361 | int register_md_personality(struct md_personality *p) |
1da177e4 | 8362 | { |
9d48739e N |
8363 | pr_debug("md: %s personality registered for level %d\n", |
8364 | p->name, p->level); | |
1da177e4 | 8365 | spin_lock(&pers_lock); |
2604b703 | 8366 | list_add_tail(&p->list, &pers_list); |
1da177e4 LT |
8367 | spin_unlock(&pers_lock); |
8368 | return 0; | |
8369 | } | |
6c144d31 | 8370 | EXPORT_SYMBOL(register_md_personality); |
1da177e4 | 8371 | |
84fc4b56 | 8372 | int unregister_md_personality(struct md_personality *p) |
1da177e4 | 8373 | { |
9d48739e | 8374 | pr_debug("md: %s personality unregistered\n", p->name); |
1da177e4 | 8375 | spin_lock(&pers_lock); |
2604b703 | 8376 | list_del_init(&p->list); |
1da177e4 LT |
8377 | spin_unlock(&pers_lock); |
8378 | return 0; | |
8379 | } | |
6c144d31 | 8380 | EXPORT_SYMBOL(unregister_md_personality); |
1da177e4 | 8381 | |
6022e75b N |
8382 | int register_md_cluster_operations(struct md_cluster_operations *ops, |
8383 | struct module *module) | |
edb39c9d | 8384 | { |
6022e75b | 8385 | int ret = 0; |
edb39c9d | 8386 | spin_lock(&pers_lock); |
6022e75b N |
8387 | if (md_cluster_ops != NULL) |
8388 | ret = -EALREADY; | |
8389 | else { | |
8390 | md_cluster_ops = ops; | |
8391 | md_cluster_mod = module; | |
8392 | } | |
edb39c9d | 8393 | spin_unlock(&pers_lock); |
6022e75b | 8394 | return ret; |
edb39c9d GR |
8395 | } |
8396 | EXPORT_SYMBOL(register_md_cluster_operations); | |
8397 | ||
8398 | int unregister_md_cluster_operations(void) | |
8399 | { | |
8400 | spin_lock(&pers_lock); | |
8401 | md_cluster_ops = NULL; | |
8402 | spin_unlock(&pers_lock); | |
8403 | return 0; | |
8404 | } | |
8405 | EXPORT_SYMBOL(unregister_md_cluster_operations); | |
8406 | ||
8407 | int md_setup_cluster(struct mddev *mddev, int nodes) | |
8408 | { | |
7c9d5c54 | 8409 | int ret; |
47a7b0d8 GJ |
8410 | if (!md_cluster_ops) |
8411 | request_module("md-cluster"); | |
edb39c9d | 8412 | spin_lock(&pers_lock); |
47a7b0d8 | 8413 | /* ensure module won't be unloaded */ |
edb39c9d | 8414 | if (!md_cluster_ops || !try_module_get(md_cluster_mod)) { |
9d48739e | 8415 | pr_warn("can't find md-cluster module or get it's reference.\n"); |
edb39c9d GR |
8416 | spin_unlock(&pers_lock); |
8417 | return -ENOENT; | |
8418 | } | |
8419 | spin_unlock(&pers_lock); | |
8420 | ||
7c9d5c54 ZH |
8421 | ret = md_cluster_ops->join(mddev, nodes); |
8422 | if (!ret) | |
8423 | mddev->safemode_delay = 0; | |
8424 | return ret; | |
edb39c9d GR |
8425 | } |
8426 | ||
8427 | void md_cluster_stop(struct mddev *mddev) | |
8428 | { | |
c4ce867f GR |
8429 | if (!md_cluster_ops) |
8430 | return; | |
edb39c9d GR |
8431 | md_cluster_ops->leave(mddev); |
8432 | module_put(md_cluster_mod); | |
8433 | } | |
8434 | ||
fd01b88c | 8435 | static int is_mddev_idle(struct mddev *mddev, int init) |
1da177e4 | 8436 | { |
f72ffdd6 | 8437 | struct md_rdev *rdev; |
1da177e4 | 8438 | int idle; |
eea1bf38 | 8439 | int curr_events; |
1da177e4 LT |
8440 | |
8441 | idle = 1; | |
4b80991c N |
8442 | rcu_read_lock(); |
8443 | rdev_for_each_rcu(rdev, mddev) { | |
4245e52d | 8444 | struct gendisk *disk = rdev->bdev->bd_disk; |
8446fe92 | 8445 | curr_events = (int)part_stat_read_accum(disk->part0, sectors) - |
eea1bf38 | 8446 | atomic_read(&disk->sync_io); |
713f6ab1 N |
8447 | /* sync IO will cause sync_io to increase before the disk_stats |
8448 | * as sync_io is counted when a request starts, and | |
8449 | * disk_stats is counted when it completes. | |
8450 | * So resync activity will cause curr_events to be smaller than | |
8451 | * when there was no such activity. | |
8452 | * non-sync IO will cause disk_stat to increase without | |
8453 | * increasing sync_io so curr_events will (eventually) | |
8454 | * be larger than it was before. Once it becomes | |
8455 | * substantially larger, the test below will cause | |
8456 | * the array to appear non-idle, and resync will slow | |
8457 | * down. | |
8458 | * If there is a lot of outstanding resync activity when | |
8459 | * we set last_event to curr_events, then all that activity | |
8460 | * completing might cause the array to appear non-idle | |
8461 | * and resync will be slowed down even though there might | |
8462 | * not have been non-resync activity. This will only | |
8463 | * happen once though. 'last_events' will soon reflect | |
8464 | * the state where there is little or no outstanding | |
8465 | * resync requests, and further resync activity will | |
8466 | * always make curr_events less than last_events. | |
c0e48521 | 8467 | * |
1da177e4 | 8468 | */ |
eea1bf38 | 8469 | if (init || curr_events - rdev->last_events > 64) { |
1da177e4 LT |
8470 | rdev->last_events = curr_events; |
8471 | idle = 0; | |
8472 | } | |
8473 | } | |
4b80991c | 8474 | rcu_read_unlock(); |
1da177e4 LT |
8475 | return idle; |
8476 | } | |
8477 | ||
fd01b88c | 8478 | void md_done_sync(struct mddev *mddev, int blocks, int ok) |
1da177e4 LT |
8479 | { |
8480 | /* another "blocks" (512byte) blocks have been synced */ | |
8481 | atomic_sub(blocks, &mddev->recovery_active); | |
8482 | wake_up(&mddev->recovery_wait); | |
8483 | if (!ok) { | |
dfc70645 | 8484 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
0a19caab | 8485 | set_bit(MD_RECOVERY_ERROR, &mddev->recovery); |
1da177e4 LT |
8486 | md_wakeup_thread(mddev->thread); |
8487 | // stop recovery, signal do_sync .... | |
8488 | } | |
8489 | } | |
6c144d31 | 8490 | EXPORT_SYMBOL(md_done_sync); |
1da177e4 | 8491 | |
06d91a5f N |
8492 | /* md_write_start(mddev, bi) |
8493 | * If we need to update some array metadata (e.g. 'active' flag | |
3d310eb7 N |
8494 | * in superblock) before writing, schedule a superblock update |
8495 | * and wait for it to complete. | |
cc27b0c7 N |
8496 | * A return value of 'false' means that the write wasn't recorded |
8497 | * and cannot proceed as the array is being suspend. | |
06d91a5f | 8498 | */ |
cc27b0c7 | 8499 | bool md_write_start(struct mddev *mddev, struct bio *bi) |
1da177e4 | 8500 | { |
0fd62b86 | 8501 | int did_change = 0; |
4b6c1060 | 8502 | |
06d91a5f | 8503 | if (bio_data_dir(bi) != WRITE) |
cc27b0c7 | 8504 | return true; |
06d91a5f | 8505 | |
f91de92e N |
8506 | BUG_ON(mddev->ro == 1); |
8507 | if (mddev->ro == 2) { | |
8508 | /* need to switch to read/write */ | |
8509 | mddev->ro = 0; | |
8510 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8511 | md_wakeup_thread(mddev->thread); | |
25156198 | 8512 | md_wakeup_thread(mddev->sync_thread); |
0fd62b86 | 8513 | did_change = 1; |
f91de92e | 8514 | } |
4ad23a97 N |
8515 | rcu_read_lock(); |
8516 | percpu_ref_get(&mddev->writes_pending); | |
55cc39f3 | 8517 | smp_mb(); /* Match smp_mb in set_in_sync() */ |
31a59e34 N |
8518 | if (mddev->safemode == 1) |
8519 | mddev->safemode = 0; | |
4ad23a97 | 8520 | /* sync_checkers is always 0 when writes_pending is in per-cpu mode */ |
81fe48e9 | 8521 | if (mddev->in_sync || mddev->sync_checkers) { |
85572d7c | 8522 | spin_lock(&mddev->lock); |
3d310eb7 N |
8523 | if (mddev->in_sync) { |
8524 | mddev->in_sync = 0; | |
2953079c SL |
8525 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8526 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
3d310eb7 | 8527 | md_wakeup_thread(mddev->thread); |
0fd62b86 | 8528 | did_change = 1; |
3d310eb7 | 8529 | } |
85572d7c | 8530 | spin_unlock(&mddev->lock); |
06d91a5f | 8531 | } |
4ad23a97 | 8532 | rcu_read_unlock(); |
0fd62b86 | 8533 | if (did_change) |
00bcb4ac | 8534 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
4b6c1060 HM |
8535 | if (!mddev->has_superblocks) |
8536 | return true; | |
09a44cc1 | 8537 | wait_event(mddev->sb_wait, |
d47c8ad2 N |
8538 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags) || |
8539 | mddev->suspended); | |
cc27b0c7 N |
8540 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) { |
8541 | percpu_ref_put(&mddev->writes_pending); | |
8542 | return false; | |
8543 | } | |
8544 | return true; | |
1da177e4 | 8545 | } |
6c144d31 | 8546 | EXPORT_SYMBOL(md_write_start); |
1da177e4 | 8547 | |
49728050 N |
8548 | /* md_write_inc can only be called when md_write_start() has |
8549 | * already been called at least once of the current request. | |
8550 | * It increments the counter and is useful when a single request | |
8551 | * is split into several parts. Each part causes an increment and | |
8552 | * so needs a matching md_write_end(). | |
8553 | * Unlike md_write_start(), it is safe to call md_write_inc() inside | |
8554 | * a spinlocked region. | |
8555 | */ | |
8556 | void md_write_inc(struct mddev *mddev, struct bio *bi) | |
8557 | { | |
8558 | if (bio_data_dir(bi) != WRITE) | |
8559 | return; | |
8560 | WARN_ON_ONCE(mddev->in_sync || mddev->ro); | |
4ad23a97 | 8561 | percpu_ref_get(&mddev->writes_pending); |
49728050 N |
8562 | } |
8563 | EXPORT_SYMBOL(md_write_inc); | |
8564 | ||
fd01b88c | 8565 | void md_write_end(struct mddev *mddev) |
1da177e4 | 8566 | { |
4ad23a97 N |
8567 | percpu_ref_put(&mddev->writes_pending); |
8568 | ||
8569 | if (mddev->safemode == 2) | |
8570 | md_wakeup_thread(mddev->thread); | |
8571 | else if (mddev->safemode_delay) | |
8572 | /* The roundup() ensures this only performs locking once | |
8573 | * every ->safemode_delay jiffies | |
8574 | */ | |
8575 | mod_timer(&mddev->safemode_timer, | |
8576 | roundup(jiffies, mddev->safemode_delay) + | |
8577 | mddev->safemode_delay); | |
1da177e4 | 8578 | } |
4ad23a97 | 8579 | |
6c144d31 | 8580 | EXPORT_SYMBOL(md_write_end); |
1da177e4 | 8581 | |
cf78408f XN |
8582 | /* This is used by raid0 and raid10 */ |
8583 | void md_submit_discard_bio(struct mddev *mddev, struct md_rdev *rdev, | |
8584 | struct bio *bio, sector_t start, sector_t size) | |
8585 | { | |
8586 | struct bio *discard_bio = NULL; | |
8587 | ||
8588 | if (__blkdev_issue_discard(rdev->bdev, start, size, GFP_NOIO, 0, | |
8589 | &discard_bio) || !discard_bio) | |
8590 | return; | |
8591 | ||
8592 | bio_chain(discard_bio, bio); | |
8593 | bio_clone_blkg_association(discard_bio, bio); | |
8594 | if (mddev->gendisk) | |
8595 | trace_block_bio_remap(discard_bio, | |
8596 | disk_devt(mddev->gendisk), | |
8597 | bio->bi_iter.bi_sector); | |
8598 | submit_bio_noacct(discard_bio); | |
8599 | } | |
8600 | EXPORT_SYMBOL_GPL(md_submit_discard_bio); | |
8601 | ||
2a2275d6 N |
8602 | /* md_allow_write(mddev) |
8603 | * Calling this ensures that the array is marked 'active' so that writes | |
8604 | * may proceed without blocking. It is important to call this before | |
8605 | * attempting a GFP_KERNEL allocation while holding the mddev lock. | |
8606 | * Must be called with mddev_lock held. | |
8607 | */ | |
2214c260 | 8608 | void md_allow_write(struct mddev *mddev) |
2a2275d6 N |
8609 | { |
8610 | if (!mddev->pers) | |
2214c260 | 8611 | return; |
2a2275d6 | 8612 | if (mddev->ro) |
2214c260 | 8613 | return; |
1a0fd497 | 8614 | if (!mddev->pers->sync_request) |
2214c260 | 8615 | return; |
2a2275d6 | 8616 | |
85572d7c | 8617 | spin_lock(&mddev->lock); |
2a2275d6 N |
8618 | if (mddev->in_sync) { |
8619 | mddev->in_sync = 0; | |
2953079c SL |
8620 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8621 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
2a2275d6 N |
8622 | if (mddev->safemode_delay && |
8623 | mddev->safemode == 0) | |
8624 | mddev->safemode = 1; | |
85572d7c | 8625 | spin_unlock(&mddev->lock); |
2a2275d6 | 8626 | md_update_sb(mddev, 0); |
00bcb4ac | 8627 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
2214c260 AP |
8628 | /* wait for the dirty state to be recorded in the metadata */ |
8629 | wait_event(mddev->sb_wait, | |
2214c260 | 8630 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
2a2275d6 | 8631 | } else |
85572d7c | 8632 | spin_unlock(&mddev->lock); |
2a2275d6 N |
8633 | } |
8634 | EXPORT_SYMBOL_GPL(md_allow_write); | |
8635 | ||
1da177e4 LT |
8636 | #define SYNC_MARKS 10 |
8637 | #define SYNC_MARK_STEP (3*HZ) | |
54f89341 | 8638 | #define UPDATE_FREQUENCY (5*60*HZ) |
4ed8731d | 8639 | void md_do_sync(struct md_thread *thread) |
1da177e4 | 8640 | { |
4ed8731d | 8641 | struct mddev *mddev = thread->mddev; |
fd01b88c | 8642 | struct mddev *mddev2; |
e5b521ee | 8643 | unsigned int currspeed = 0, window; |
ac7e50a3 | 8644 | sector_t max_sectors,j, io_sectors, recovery_done; |
1da177e4 | 8645 | unsigned long mark[SYNC_MARKS]; |
54f89341 | 8646 | unsigned long update_time; |
1da177e4 LT |
8647 | sector_t mark_cnt[SYNC_MARKS]; |
8648 | int last_mark,m; | |
8649 | struct list_head *tmp; | |
8650 | sector_t last_check; | |
57afd89f | 8651 | int skipped = 0; |
3cb03002 | 8652 | struct md_rdev *rdev; |
c4a39551 | 8653 | char *desc, *action = NULL; |
7c2c57c9 | 8654 | struct blk_plug plug; |
41a9a0dc | 8655 | int ret; |
1da177e4 LT |
8656 | |
8657 | /* just incase thread restarts... */ | |
d5d885fd SL |
8658 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
8659 | test_bit(MD_RECOVERY_WAIT, &mddev->recovery)) | |
1da177e4 | 8660 | return; |
3991b31e N |
8661 | if (mddev->ro) {/* never try to sync a read-only array */ |
8662 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
5fd6c1dc | 8663 | return; |
3991b31e | 8664 | } |
1da177e4 | 8665 | |
41a9a0dc GJ |
8666 | if (mddev_is_clustered(mddev)) { |
8667 | ret = md_cluster_ops->resync_start(mddev); | |
8668 | if (ret) | |
8669 | goto skip; | |
8670 | ||
bb8bf15b | 8671 | set_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags); |
41a9a0dc GJ |
8672 | if (!(test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8673 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) || | |
8674 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) | |
8675 | && ((unsigned long long)mddev->curr_resync_completed | |
8676 | < (unsigned long long)mddev->resync_max_sectors)) | |
8677 | goto skip; | |
8678 | } | |
8679 | ||
61df9d91 | 8680 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
c4a39551 | 8681 | if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) { |
61df9d91 | 8682 | desc = "data-check"; |
c4a39551 JB |
8683 | action = "check"; |
8684 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
61df9d91 | 8685 | desc = "requested-resync"; |
c4a39551 JB |
8686 | action = "repair"; |
8687 | } else | |
61df9d91 N |
8688 | desc = "resync"; |
8689 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
8690 | desc = "reshape"; | |
8691 | else | |
8692 | desc = "recovery"; | |
8693 | ||
c4a39551 JB |
8694 | mddev->last_sync_action = action ?: desc; |
8695 | ||
1da177e4 LT |
8696 | /* we overload curr_resync somewhat here. |
8697 | * 0 == not engaged in resync at all | |
8698 | * 2 == checking that there is no conflict with another sync | |
8699 | * 1 == like 2, but have yielded to allow conflicting resync to | |
e5b521ee | 8700 | * commence |
1da177e4 LT |
8701 | * other == active in resync - this many blocks |
8702 | * | |
8703 | * Before starting a resync we must have set curr_resync to | |
8704 | * 2, and then checked that every "conflicting" array has curr_resync | |
8705 | * less than ours. When we find one that is the same or higher | |
8706 | * we wait on resync_wait. To avoid deadlock, we reduce curr_resync | |
8707 | * to 1 if we choose to yield (based arbitrarily on address of mddev structure). | |
8708 | * This will mean we have to start checking from the beginning again. | |
8709 | * | |
8710 | */ | |
8711 | ||
8712 | do { | |
c622ca54 | 8713 | int mddev2_minor = -1; |
1da177e4 LT |
8714 | mddev->curr_resync = 2; |
8715 | ||
8716 | try_again: | |
404e4b43 | 8717 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
1da177e4 | 8718 | goto skip; |
29ac4aa3 | 8719 | for_each_mddev(mddev2, tmp) { |
1da177e4 LT |
8720 | if (mddev2 == mddev) |
8721 | continue; | |
90b08710 BS |
8722 | if (!mddev->parallel_resync |
8723 | && mddev2->curr_resync | |
8724 | && match_mddev_units(mddev, mddev2)) { | |
1da177e4 LT |
8725 | DEFINE_WAIT(wq); |
8726 | if (mddev < mddev2 && mddev->curr_resync == 2) { | |
8727 | /* arbitrarily yield */ | |
8728 | mddev->curr_resync = 1; | |
8729 | wake_up(&resync_wait); | |
8730 | } | |
8731 | if (mddev > mddev2 && mddev->curr_resync == 1) | |
8732 | /* no need to wait here, we can wait the next | |
8733 | * time 'round when curr_resync == 2 | |
8734 | */ | |
8735 | continue; | |
9744197c N |
8736 | /* We need to wait 'interruptible' so as not to |
8737 | * contribute to the load average, and not to | |
8738 | * be caught by 'softlockup' | |
8739 | */ | |
8740 | prepare_to_wait(&resync_wait, &wq, TASK_INTERRUPTIBLE); | |
c91abf5a | 8741 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
8712e553 | 8742 | mddev2->curr_resync >= mddev->curr_resync) { |
c622ca54 AP |
8743 | if (mddev2_minor != mddev2->md_minor) { |
8744 | mddev2_minor = mddev2->md_minor; | |
9d48739e N |
8745 | pr_info("md: delaying %s of %s until %s has finished (they share one or more physical units)\n", |
8746 | desc, mdname(mddev), | |
8747 | mdname(mddev2)); | |
c622ca54 | 8748 | } |
1da177e4 | 8749 | mddev_put(mddev2); |
9744197c N |
8750 | if (signal_pending(current)) |
8751 | flush_signals(current); | |
1da177e4 LT |
8752 | schedule(); |
8753 | finish_wait(&resync_wait, &wq); | |
8754 | goto try_again; | |
8755 | } | |
8756 | finish_wait(&resync_wait, &wq); | |
8757 | } | |
8758 | } | |
8759 | } while (mddev->curr_resync < 2); | |
8760 | ||
5fd6c1dc | 8761 | j = 0; |
9d88883e | 8762 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
1da177e4 | 8763 | /* resync follows the size requested by the personality, |
57afd89f | 8764 | * which defaults to physical size, but can be virtual size |
1da177e4 LT |
8765 | */ |
8766 | max_sectors = mddev->resync_max_sectors; | |
7f7583d4 | 8767 | atomic64_set(&mddev->resync_mismatches, 0); |
5fd6c1dc | 8768 | /* we don't use the checkpoint if there's a bitmap */ |
5e96ee65 NB |
8769 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) |
8770 | j = mddev->resync_min; | |
8771 | else if (!mddev->bitmap) | |
5fd6c1dc | 8772 | j = mddev->recovery_cp; |
5e96ee65 | 8773 | |
cb9ee154 | 8774 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) { |
c804cdec | 8775 | max_sectors = mddev->resync_max_sectors; |
cb9ee154 GJ |
8776 | /* |
8777 | * If the original node aborts reshaping then we continue the | |
8778 | * reshaping, so set j again to avoid restart reshape from the | |
8779 | * first beginning | |
8780 | */ | |
8781 | if (mddev_is_clustered(mddev) && | |
8782 | mddev->reshape_position != MaxSector) | |
8783 | j = mddev->reshape_position; | |
8784 | } else { | |
1da177e4 | 8785 | /* recovery follows the physical size of devices */ |
58c0fed4 | 8786 | max_sectors = mddev->dev_sectors; |
5fd6c1dc | 8787 | j = MaxSector; |
4e59ca7d | 8788 | rcu_read_lock(); |
dafb20fa | 8789 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 8790 | if (rdev->raid_disk >= 0 && |
f2076e7d | 8791 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
8792 | !test_bit(Faulty, &rdev->flags) && |
8793 | !test_bit(In_sync, &rdev->flags) && | |
8794 | rdev->recovery_offset < j) | |
8795 | j = rdev->recovery_offset; | |
4e59ca7d | 8796 | rcu_read_unlock(); |
133d4527 N |
8797 | |
8798 | /* If there is a bitmap, we need to make sure all | |
8799 | * writes that started before we added a spare | |
8800 | * complete before we start doing a recovery. | |
8801 | * Otherwise the write might complete and (via | |
8802 | * bitmap_endwrite) set a bit in the bitmap after the | |
8803 | * recovery has checked that bit and skipped that | |
8804 | * region. | |
8805 | */ | |
8806 | if (mddev->bitmap) { | |
8807 | mddev->pers->quiesce(mddev, 1); | |
8808 | mddev->pers->quiesce(mddev, 0); | |
8809 | } | |
5fd6c1dc | 8810 | } |
1da177e4 | 8811 | |
9d48739e N |
8812 | pr_info("md: %s of RAID array %s\n", desc, mdname(mddev)); |
8813 | pr_debug("md: minimum _guaranteed_ speed: %d KB/sec/disk.\n", speed_min(mddev)); | |
8814 | pr_debug("md: using maximum available idle IO bandwidth (but not more than %d KB/sec) for %s.\n", | |
8815 | speed_max(mddev), desc); | |
1da177e4 | 8816 | |
eea1bf38 | 8817 | is_mddev_idle(mddev, 1); /* this initializes IO event counters */ |
5fd6c1dc | 8818 | |
57afd89f | 8819 | io_sectors = 0; |
1da177e4 LT |
8820 | for (m = 0; m < SYNC_MARKS; m++) { |
8821 | mark[m] = jiffies; | |
57afd89f | 8822 | mark_cnt[m] = io_sectors; |
1da177e4 LT |
8823 | } |
8824 | last_mark = 0; | |
8825 | mddev->resync_mark = mark[last_mark]; | |
8826 | mddev->resync_mark_cnt = mark_cnt[last_mark]; | |
8827 | ||
8828 | /* | |
8829 | * Tune reconstruction: | |
8830 | */ | |
e5b521ee | 8831 | window = 32 * (PAGE_SIZE / 512); |
9d48739e N |
8832 | pr_debug("md: using %dk window, over a total of %lluk.\n", |
8833 | window/2, (unsigned long long)max_sectors/2); | |
1da177e4 LT |
8834 | |
8835 | atomic_set(&mddev->recovery_active, 0); | |
1da177e4 LT |
8836 | last_check = 0; |
8837 | ||
8838 | if (j>2) { | |
9d48739e N |
8839 | pr_debug("md: resuming %s of %s from checkpoint.\n", |
8840 | desc, mdname(mddev)); | |
1da177e4 | 8841 | mddev->curr_resync = j; |
72f36d59 N |
8842 | } else |
8843 | mddev->curr_resync = 3; /* no longer delayed */ | |
75d3da43 | 8844 | mddev->curr_resync_completed = j; |
e1a86dbb | 8845 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
72f36d59 | 8846 | md_new_event(mddev); |
54f89341 | 8847 | update_time = jiffies; |
1da177e4 | 8848 | |
7c2c57c9 | 8849 | blk_start_plug(&plug); |
1da177e4 | 8850 | while (j < max_sectors) { |
57afd89f | 8851 | sector_t sectors; |
1da177e4 | 8852 | |
57afd89f | 8853 | skipped = 0; |
97e4f42d | 8854 | |
7a91ee1f N |
8855 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8856 | ((mddev->curr_resync > mddev->curr_resync_completed && | |
8857 | (mddev->curr_resync - mddev->curr_resync_completed) | |
8858 | > (max_sectors >> 4)) || | |
54f89341 | 8859 | time_after_eq(jiffies, update_time + UPDATE_FREQUENCY) || |
7a91ee1f | 8860 | (j - mddev->curr_resync_completed)*2 |
c5e19d90 N |
8861 | >= mddev->resync_max - mddev->curr_resync_completed || |
8862 | mddev->curr_resync_completed > mddev->resync_max | |
7a91ee1f | 8863 | )) { |
97e4f42d | 8864 | /* time to update curr_resync_completed */ |
97e4f42d N |
8865 | wait_event(mddev->recovery_wait, |
8866 | atomic_read(&mddev->recovery_active) == 0); | |
75d3da43 | 8867 | mddev->curr_resync_completed = j; |
35d78c66 | 8868 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && |
8869 | j > mddev->recovery_cp) | |
8870 | mddev->recovery_cp = j; | |
54f89341 | 8871 | update_time = jiffies; |
2953079c | 8872 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
e1a86dbb | 8873 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
97e4f42d | 8874 | } |
acb180b0 | 8875 | |
c91abf5a N |
8876 | while (j >= mddev->resync_max && |
8877 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
e62e58a5 N |
8878 | /* As this condition is controlled by user-space, |
8879 | * we can block indefinitely, so use '_interruptible' | |
8880 | * to avoid triggering warnings. | |
8881 | */ | |
8882 | flush_signals(current); /* just in case */ | |
8883 | wait_event_interruptible(mddev->recovery_wait, | |
8884 | mddev->resync_max > j | |
c91abf5a N |
8885 | || test_bit(MD_RECOVERY_INTR, |
8886 | &mddev->recovery)); | |
e62e58a5 | 8887 | } |
acb180b0 | 8888 | |
c91abf5a N |
8889 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8890 | break; | |
acb180b0 | 8891 | |
09314799 | 8892 | sectors = mddev->pers->sync_request(mddev, j, &skipped); |
57afd89f | 8893 | if (sectors == 0) { |
dfc70645 | 8894 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
c91abf5a | 8895 | break; |
1da177e4 | 8896 | } |
57afd89f N |
8897 | |
8898 | if (!skipped) { /* actual IO requested */ | |
8899 | io_sectors += sectors; | |
8900 | atomic_add(sectors, &mddev->recovery_active); | |
8901 | } | |
8902 | ||
e875ecea N |
8903 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8904 | break; | |
8905 | ||
1da177e4 | 8906 | j += sectors; |
5ed1df2e N |
8907 | if (j > max_sectors) |
8908 | /* when skipping, extra large numbers can be returned. */ | |
8909 | j = max_sectors; | |
72f36d59 N |
8910 | if (j > 2) |
8911 | mddev->curr_resync = j; | |
ff4e8d9a | 8912 | mddev->curr_mark_cnt = io_sectors; |
d7603b7e | 8913 | if (last_check == 0) |
e875ecea | 8914 | /* this is the earliest that rebuild will be |
d7603b7e N |
8915 | * visible in /proc/mdstat |
8916 | */ | |
8917 | md_new_event(mddev); | |
57afd89f N |
8918 | |
8919 | if (last_check + window > io_sectors || j == max_sectors) | |
1da177e4 LT |
8920 | continue; |
8921 | ||
57afd89f | 8922 | last_check = io_sectors; |
1da177e4 LT |
8923 | repeat: |
8924 | if (time_after_eq(jiffies, mark[last_mark] + SYNC_MARK_STEP )) { | |
8925 | /* step marks */ | |
8926 | int next = (last_mark+1) % SYNC_MARKS; | |
8927 | ||
8928 | mddev->resync_mark = mark[next]; | |
8929 | mddev->resync_mark_cnt = mark_cnt[next]; | |
8930 | mark[next] = jiffies; | |
57afd89f | 8931 | mark_cnt[next] = io_sectors - atomic_read(&mddev->recovery_active); |
1da177e4 LT |
8932 | last_mark = next; |
8933 | } | |
8934 | ||
c91abf5a N |
8935 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8936 | break; | |
1da177e4 LT |
8937 | |
8938 | /* | |
8939 | * this loop exits only if either when we are slower than | |
8940 | * the 'hard' speed limit, or the system was IO-idle for | |
8941 | * a jiffy. | |
8942 | * the system might be non-idle CPU-wise, but we only care | |
8943 | * about not overloading the IO subsystem. (things like an | |
8944 | * e2fsck being done on the RAID array should execute fast) | |
8945 | */ | |
1da177e4 LT |
8946 | cond_resched(); |
8947 | ||
ac7e50a3 XN |
8948 | recovery_done = io_sectors - atomic_read(&mddev->recovery_active); |
8949 | currspeed = ((unsigned long)(recovery_done - mddev->resync_mark_cnt))/2 | |
57afd89f | 8950 | /((jiffies-mddev->resync_mark)/HZ +1) +1; |
1da177e4 | 8951 | |
88202a0c | 8952 | if (currspeed > speed_min(mddev)) { |
ac8fa419 | 8953 | if (currspeed > speed_max(mddev)) { |
c0e48521 | 8954 | msleep(500); |
1da177e4 LT |
8955 | goto repeat; |
8956 | } | |
ac8fa419 N |
8957 | if (!is_mddev_idle(mddev, 0)) { |
8958 | /* | |
8959 | * Give other IO more of a chance. | |
8960 | * The faster the devices, the less we wait. | |
8961 | */ | |
8962 | wait_event(mddev->recovery_wait, | |
8963 | !atomic_read(&mddev->recovery_active)); | |
8964 | } | |
1da177e4 LT |
8965 | } |
8966 | } | |
9d48739e N |
8967 | pr_info("md: %s: %s %s.\n",mdname(mddev), desc, |
8968 | test_bit(MD_RECOVERY_INTR, &mddev->recovery) | |
8969 | ? "interrupted" : "done"); | |
1da177e4 LT |
8970 | /* |
8971 | * this also signals 'finished resyncing' to md_stop | |
8972 | */ | |
7c2c57c9 | 8973 | blk_finish_plug(&plug); |
1da177e4 LT |
8974 | wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active)); |
8975 | ||
5ed1df2e N |
8976 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8977 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
1217e1d1 | 8978 | mddev->curr_resync > 3) { |
5ed1df2e | 8979 | mddev->curr_resync_completed = mddev->curr_resync; |
e1a86dbb | 8980 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
5ed1df2e | 8981 | } |
09314799 | 8982 | mddev->pers->sync_request(mddev, max_sectors, &skipped); |
1da177e4 | 8983 | |
dfc70645 | 8984 | if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) && |
1217e1d1 | 8985 | mddev->curr_resync > 3) { |
5fd6c1dc N |
8986 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
8987 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
8988 | if (mddev->curr_resync >= mddev->recovery_cp) { | |
9d48739e N |
8989 | pr_debug("md: checkpointing %s of %s.\n", |
8990 | desc, mdname(mddev)); | |
0a19caab | 8991 | if (test_bit(MD_RECOVERY_ERROR, |
8992 | &mddev->recovery)) | |
8993 | mddev->recovery_cp = | |
8994 | mddev->curr_resync_completed; | |
8995 | else | |
8996 | mddev->recovery_cp = | |
8997 | mddev->curr_resync; | |
5fd6c1dc N |
8998 | } |
8999 | } else | |
9000 | mddev->recovery_cp = MaxSector; | |
9001 | } else { | |
9002 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) | |
9003 | mddev->curr_resync = MaxSector; | |
db0505d3 N |
9004 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9005 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) { | |
9006 | rcu_read_lock(); | |
9007 | rdev_for_each_rcu(rdev, mddev) | |
9008 | if (rdev->raid_disk >= 0 && | |
9009 | mddev->delta_disks >= 0 && | |
9010 | !test_bit(Journal, &rdev->flags) && | |
9011 | !test_bit(Faulty, &rdev->flags) && | |
9012 | !test_bit(In_sync, &rdev->flags) && | |
9013 | rdev->recovery_offset < mddev->curr_resync) | |
9014 | rdev->recovery_offset = mddev->curr_resync; | |
9015 | rcu_read_unlock(); | |
9016 | } | |
5fd6c1dc | 9017 | } |
1da177e4 | 9018 | } |
db91ff55 | 9019 | skip: |
bb8bf15b GJ |
9020 | /* set CHANGE_PENDING here since maybe another update is needed, |
9021 | * so other nodes are informed. It should be harmless for normal | |
9022 | * raid */ | |
2953079c SL |
9023 | set_mask_bits(&mddev->sb_flags, 0, |
9024 | BIT(MD_SB_CHANGE_PENDING) | BIT(MD_SB_CHANGE_DEVS)); | |
c186b128 | 9025 | |
8876391e BC |
9026 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9027 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
9028 | mddev->delta_disks > 0 && | |
9029 | mddev->pers->finish_reshape && | |
9030 | mddev->pers->size && | |
9031 | mddev->queue) { | |
9032 | mddev_lock_nointr(mddev); | |
9033 | md_set_array_sectors(mddev, mddev->pers->size(mddev, 0, 0)); | |
9034 | mddev_unlock(mddev); | |
2c247c51 CH |
9035 | if (!mddev_is_clustered(mddev)) |
9036 | set_capacity_and_notify(mddev->gendisk, | |
9037 | mddev->array_sectors); | |
8876391e BC |
9038 | } |
9039 | ||
23da422b | 9040 | spin_lock(&mddev->lock); |
c07b70ad N |
9041 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { |
9042 | /* We completed so min/max setting can be forgotten if used. */ | |
9043 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
9044 | mddev->resync_min = 0; | |
9045 | mddev->resync_max = MaxSector; | |
9046 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
9047 | mddev->resync_min = mddev->curr_resync_completed; | |
f7851be7 | 9048 | set_bit(MD_RECOVERY_DONE, &mddev->recovery); |
1da177e4 | 9049 | mddev->curr_resync = 0; |
23da422b N |
9050 | spin_unlock(&mddev->lock); |
9051 | ||
1da177e4 | 9052 | wake_up(&resync_wait); |
1da177e4 | 9053 | md_wakeup_thread(mddev->thread); |
c6207277 | 9054 | return; |
1da177e4 | 9055 | } |
29269553 | 9056 | EXPORT_SYMBOL_GPL(md_do_sync); |
1da177e4 | 9057 | |
746d3207 N |
9058 | static int remove_and_add_spares(struct mddev *mddev, |
9059 | struct md_rdev *this) | |
b4c4c7b8 | 9060 | { |
3cb03002 | 9061 | struct md_rdev *rdev; |
b4c4c7b8 | 9062 | int spares = 0; |
f2a371c5 | 9063 | int removed = 0; |
d787be40 | 9064 | bool remove_some = false; |
b4c4c7b8 | 9065 | |
39772f0a N |
9066 | if (this && test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
9067 | /* Mustn't remove devices when resync thread is running */ | |
9068 | return 0; | |
9069 | ||
d787be40 N |
9070 | rdev_for_each(rdev, mddev) { |
9071 | if ((this == NULL || rdev == this) && | |
9072 | rdev->raid_disk >= 0 && | |
9073 | !test_bit(Blocked, &rdev->flags) && | |
9074 | test_bit(Faulty, &rdev->flags) && | |
9075 | atomic_read(&rdev->nr_pending)==0) { | |
9076 | /* Faulty non-Blocked devices with nr_pending == 0 | |
9077 | * never get nr_pending incremented, | |
9078 | * never get Faulty cleared, and never get Blocked set. | |
9079 | * So we can synchronize_rcu now rather than once per device | |
9080 | */ | |
9081 | remove_some = true; | |
9082 | set_bit(RemoveSynchronized, &rdev->flags); | |
9083 | } | |
9084 | } | |
9085 | ||
9086 | if (remove_some) | |
9087 | synchronize_rcu(); | |
9088 | rdev_for_each(rdev, mddev) { | |
746d3207 N |
9089 | if ((this == NULL || rdev == this) && |
9090 | rdev->raid_disk >= 0 && | |
6bfe0b49 | 9091 | !test_bit(Blocked, &rdev->flags) && |
d787be40 | 9092 | ((test_bit(RemoveSynchronized, &rdev->flags) || |
f2076e7d SL |
9093 | (!test_bit(In_sync, &rdev->flags) && |
9094 | !test_bit(Journal, &rdev->flags))) && | |
d787be40 | 9095 | atomic_read(&rdev->nr_pending)==0)) { |
b4c4c7b8 | 9096 | if (mddev->pers->hot_remove_disk( |
b8321b68 | 9097 | mddev, rdev) == 0) { |
36fad858 | 9098 | sysfs_unlink_rdev(mddev, rdev); |
011abdc9 | 9099 | rdev->saved_raid_disk = rdev->raid_disk; |
b4c4c7b8 | 9100 | rdev->raid_disk = -1; |
f2a371c5 | 9101 | removed++; |
b4c4c7b8 N |
9102 | } |
9103 | } | |
d787be40 N |
9104 | if (remove_some && test_bit(RemoveSynchronized, &rdev->flags)) |
9105 | clear_bit(RemoveSynchronized, &rdev->flags); | |
9106 | } | |
9107 | ||
90584fc9 | 9108 | if (removed && mddev->kobj.sd) |
e1a86dbb | 9109 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
b4c4c7b8 | 9110 | |
2910ff17 | 9111 | if (this && removed) |
746d3207 N |
9112 | goto no_add; |
9113 | ||
dafb20fa | 9114 | rdev_for_each(rdev, mddev) { |
2910ff17 GR |
9115 | if (this && this != rdev) |
9116 | continue; | |
dbb64f86 GR |
9117 | if (test_bit(Candidate, &rdev->flags)) |
9118 | continue; | |
7bfec5f3 N |
9119 | if (rdev->raid_disk >= 0 && |
9120 | !test_bit(In_sync, &rdev->flags) && | |
f2076e7d | 9121 | !test_bit(Journal, &rdev->flags) && |
7bfec5f3 N |
9122 | !test_bit(Faulty, &rdev->flags)) |
9123 | spares++; | |
7ceb17e8 N |
9124 | if (rdev->raid_disk >= 0) |
9125 | continue; | |
9126 | if (test_bit(Faulty, &rdev->flags)) | |
9127 | continue; | |
f6b6ec5c SL |
9128 | if (!test_bit(Journal, &rdev->flags)) { |
9129 | if (mddev->ro && | |
9130 | ! (rdev->saved_raid_disk >= 0 && | |
9131 | !test_bit(Bitmap_sync, &rdev->flags))) | |
9132 | continue; | |
7ceb17e8 | 9133 | |
f6b6ec5c SL |
9134 | rdev->recovery_offset = 0; |
9135 | } | |
3f79cc22 | 9136 | if (mddev->pers->hot_add_disk(mddev, rdev) == 0) { |
5e3b8a8d DLM |
9137 | /* failure here is OK */ |
9138 | sysfs_link_rdev(mddev, rdev); | |
f6b6ec5c SL |
9139 | if (!test_bit(Journal, &rdev->flags)) |
9140 | spares++; | |
7ceb17e8 | 9141 | md_new_event(mddev); |
2953079c | 9142 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
dfc70645 | 9143 | } |
b4c4c7b8 | 9144 | } |
746d3207 | 9145 | no_add: |
6dafab6b | 9146 | if (removed) |
2953079c | 9147 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
b4c4c7b8 N |
9148 | return spares; |
9149 | } | |
7ebc0be7 | 9150 | |
ac05f256 N |
9151 | static void md_start_sync(struct work_struct *ws) |
9152 | { | |
9153 | struct mddev *mddev = container_of(ws, struct mddev, del_work); | |
c186b128 | 9154 | |
ac05f256 N |
9155 | mddev->sync_thread = md_register_thread(md_do_sync, |
9156 | mddev, | |
9157 | "resync"); | |
9158 | if (!mddev->sync_thread) { | |
9d48739e N |
9159 | pr_warn("%s: could not start resync thread...\n", |
9160 | mdname(mddev)); | |
ac05f256 N |
9161 | /* leave the spares where they are, it shouldn't hurt */ |
9162 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
9163 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9164 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9165 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
9166 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 9167 | wake_up(&resync_wait); |
ac05f256 N |
9168 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
9169 | &mddev->recovery)) | |
9170 | if (mddev->sysfs_action) | |
9171 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9172 | } else | |
9173 | md_wakeup_thread(mddev->sync_thread); | |
9174 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9175 | md_new_event(mddev); | |
9176 | } | |
9177 | ||
1da177e4 LT |
9178 | /* |
9179 | * This routine is regularly called by all per-raid-array threads to | |
9180 | * deal with generic issues like resync and super-block update. | |
9181 | * Raid personalities that don't have a thread (linear/raid0) do not | |
9182 | * need this as they never do any recovery or update the superblock. | |
9183 | * | |
9184 | * It does not do any resync itself, but rather "forks" off other threads | |
9185 | * to do that as needed. | |
9186 | * When it is determined that resync is needed, we set MD_RECOVERY_RUNNING in | |
9187 | * "->recovery" and create a thread at ->sync_thread. | |
dfc70645 | 9188 | * When the thread finishes it sets MD_RECOVERY_DONE |
1da177e4 LT |
9189 | * and wakeups up this thread which will reap the thread and finish up. |
9190 | * This thread also removes any faulty devices (with nr_pending == 0). | |
9191 | * | |
9192 | * The overall approach is: | |
9193 | * 1/ if the superblock needs updating, update it. | |
9194 | * 2/ If a recovery thread is running, don't do anything else. | |
9195 | * 3/ If recovery has finished, clean up, possibly marking spares active. | |
9196 | * 4/ If there are any faulty devices, remove them. | |
9197 | * 5/ If array is degraded, try to add spares devices | |
9198 | * 6/ If array has spares or is not in-sync, start a resync thread. | |
9199 | */ | |
fd01b88c | 9200 | void md_check_recovery(struct mddev *mddev) |
1da177e4 | 9201 | { |
059421e0 N |
9202 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags) && mddev->sb_flags) { |
9203 | /* Write superblock - thread that called mddev_suspend() | |
9204 | * holds reconfig_mutex for us. | |
9205 | */ | |
9206 | set_bit(MD_UPDATING_SB, &mddev->flags); | |
9207 | smp_mb__after_atomic(); | |
9208 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags)) | |
9209 | md_update_sb(mddev, 0); | |
9210 | clear_bit_unlock(MD_UPDATING_SB, &mddev->flags); | |
9211 | wake_up(&mddev->sb_wait); | |
9212 | } | |
9213 | ||
68866e42 JB |
9214 | if (mddev->suspended) |
9215 | return; | |
9216 | ||
5f40402d | 9217 | if (mddev->bitmap) |
e64e4018 | 9218 | md_bitmap_daemon_work(mddev); |
1da177e4 | 9219 | |
fca4d848 | 9220 | if (signal_pending(current)) { |
31a59e34 | 9221 | if (mddev->pers->sync_request && !mddev->external) { |
9d48739e N |
9222 | pr_debug("md: %s in immediate safe mode\n", |
9223 | mdname(mddev)); | |
fca4d848 N |
9224 | mddev->safemode = 2; |
9225 | } | |
9226 | flush_signals(current); | |
9227 | } | |
9228 | ||
c89a8eee N |
9229 | if (mddev->ro && !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) |
9230 | return; | |
1da177e4 | 9231 | if ( ! ( |
2953079c | 9232 | (mddev->sb_flags & ~ (1<<MD_SB_CHANGE_PENDING)) || |
1da177e4 | 9233 | test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
fca4d848 | 9234 | test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
31a59e34 | 9235 | (mddev->external == 0 && mddev->safemode == 1) || |
4ad23a97 | 9236 | (mddev->safemode == 2 |
fca4d848 | 9237 | && !mddev->in_sync && mddev->recovery_cp == MaxSector) |
1da177e4 LT |
9238 | )) |
9239 | return; | |
fca4d848 | 9240 | |
df5b89b3 | 9241 | if (mddev_trylock(mddev)) { |
b4c4c7b8 | 9242 | int spares = 0; |
480523fe | 9243 | bool try_set_sync = mddev->safemode != 0; |
fca4d848 | 9244 | |
afc1f55c | 9245 | if (!mddev->external && mddev->safemode == 1) |
33182d15 N |
9246 | mddev->safemode = 0; |
9247 | ||
c89a8eee | 9248 | if (mddev->ro) { |
ab16bfc7 NB |
9249 | struct md_rdev *rdev; |
9250 | if (!mddev->external && mddev->in_sync) | |
9251 | /* 'Blocked' flag not needed as failed devices | |
9252 | * will be recorded if array switched to read/write. | |
9253 | * Leaving it set will prevent the device | |
9254 | * from being removed. | |
9255 | */ | |
9256 | rdev_for_each(rdev, mddev) | |
9257 | clear_bit(Blocked, &rdev->flags); | |
7ceb17e8 N |
9258 | /* On a read-only array we can: |
9259 | * - remove failed devices | |
9260 | * - add already-in_sync devices if the array itself | |
9261 | * is in-sync. | |
9262 | * As we only add devices that are already in-sync, | |
9263 | * we can activate the spares immediately. | |
c89a8eee | 9264 | */ |
7ceb17e8 | 9265 | remove_and_add_spares(mddev, NULL); |
8313b8e5 N |
9266 | /* There is no thread, but we need to call |
9267 | * ->spare_active and clear saved_raid_disk | |
9268 | */ | |
2ac295a5 | 9269 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8313b8e5 | 9270 | md_reap_sync_thread(mddev); |
a4a3d26d | 9271 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
8313b8e5 | 9272 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
2953079c | 9273 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
c89a8eee N |
9274 | goto unlock; |
9275 | } | |
9276 | ||
659b254f GJ |
9277 | if (mddev_is_clustered(mddev)) { |
9278 | struct md_rdev *rdev; | |
9279 | /* kick the device if another node issued a | |
9280 | * remove disk. | |
9281 | */ | |
9282 | rdev_for_each(rdev, mddev) { | |
9283 | if (test_and_clear_bit(ClusterRemove, &rdev->flags) && | |
9284 | rdev->raid_disk < 0) | |
9285 | md_kick_rdev_from_array(rdev); | |
9286 | } | |
9287 | } | |
9288 | ||
480523fe | 9289 | if (try_set_sync && !mddev->external && !mddev->in_sync) { |
85572d7c | 9290 | spin_lock(&mddev->lock); |
6497709b | 9291 | set_in_sync(mddev); |
85572d7c | 9292 | spin_unlock(&mddev->lock); |
fca4d848 | 9293 | } |
fca4d848 | 9294 | |
2953079c | 9295 | if (mddev->sb_flags) |
850b2b42 | 9296 | md_update_sb(mddev, 0); |
06d91a5f | 9297 | |
1da177e4 LT |
9298 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
9299 | !test_bit(MD_RECOVERY_DONE, &mddev->recovery)) { | |
9300 | /* resync/recovery still happening */ | |
9301 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9302 | goto unlock; | |
9303 | } | |
9304 | if (mddev->sync_thread) { | |
a91d5ac0 | 9305 | md_reap_sync_thread(mddev); |
1da177e4 LT |
9306 | goto unlock; |
9307 | } | |
72a23c21 NB |
9308 | /* Set RUNNING before clearing NEEDED to avoid |
9309 | * any transients in the value of "sync_action". | |
9310 | */ | |
72f36d59 | 9311 | mddev->curr_resync_completed = 0; |
23da422b | 9312 | spin_lock(&mddev->lock); |
72a23c21 | 9313 | set_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
23da422b | 9314 | spin_unlock(&mddev->lock); |
24dd469d N |
9315 | /* Clear some bits that don't mean anything, but |
9316 | * might be left set | |
9317 | */ | |
24dd469d N |
9318 | clear_bit(MD_RECOVERY_INTR, &mddev->recovery); |
9319 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); | |
1da177e4 | 9320 | |
ed209584 N |
9321 | if (!test_and_clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
9322 | test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) | |
ac05f256 | 9323 | goto not_running; |
1da177e4 LT |
9324 | /* no recovery is running. |
9325 | * remove any failed drives, then | |
9326 | * add spares if possible. | |
72f36d59 | 9327 | * Spares are also removed and re-added, to allow |
1da177e4 LT |
9328 | * the personality to fail the re-add. |
9329 | */ | |
1da177e4 | 9330 | |
b4c4c7b8 | 9331 | if (mddev->reshape_position != MaxSector) { |
50ac168a N |
9332 | if (mddev->pers->check_reshape == NULL || |
9333 | mddev->pers->check_reshape(mddev) != 0) | |
b4c4c7b8 | 9334 | /* Cannot proceed */ |
ac05f256 | 9335 | goto not_running; |
b4c4c7b8 | 9336 | set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); |
72a23c21 | 9337 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
746d3207 | 9338 | } else if ((spares = remove_and_add_spares(mddev, NULL))) { |
24dd469d N |
9339 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9340 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
56ac36d7 | 9341 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
72a23c21 | 9342 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9343 | } else if (mddev->recovery_cp < MaxSector) { |
9344 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
72a23c21 | 9345 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9346 | } else if (!test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) |
9347 | /* nothing to be done ... */ | |
ac05f256 | 9348 | goto not_running; |
24dd469d | 9349 | |
1da177e4 | 9350 | if (mddev->pers->sync_request) { |
ef99bf48 | 9351 | if (spares) { |
a654b9d8 N |
9352 | /* We are adding a device or devices to an array |
9353 | * which has the bitmap stored on all devices. | |
9354 | * So make sure all bitmap pages get written | |
9355 | */ | |
e64e4018 | 9356 | md_bitmap_write_all(mddev->bitmap); |
a654b9d8 | 9357 | } |
ac05f256 N |
9358 | INIT_WORK(&mddev->del_work, md_start_sync); |
9359 | queue_work(md_misc_wq, &mddev->del_work); | |
9360 | goto unlock; | |
1da177e4 | 9361 | } |
ac05f256 | 9362 | not_running: |
72a23c21 NB |
9363 | if (!mddev->sync_thread) { |
9364 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 9365 | wake_up(&resync_wait); |
72a23c21 NB |
9366 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
9367 | &mddev->recovery)) | |
0c3573f1 | 9368 | if (mddev->sysfs_action) |
00bcb4ac | 9369 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
72a23c21 | 9370 | } |
ac05f256 N |
9371 | unlock: |
9372 | wake_up(&mddev->sb_wait); | |
1da177e4 LT |
9373 | mddev_unlock(mddev); |
9374 | } | |
9375 | } | |
6c144d31 | 9376 | EXPORT_SYMBOL(md_check_recovery); |
1da177e4 | 9377 | |
a91d5ac0 JB |
9378 | void md_reap_sync_thread(struct mddev *mddev) |
9379 | { | |
9380 | struct md_rdev *rdev; | |
aefb2e5f GJ |
9381 | sector_t old_dev_sectors = mddev->dev_sectors; |
9382 | bool is_reshaped = false; | |
a91d5ac0 JB |
9383 | |
9384 | /* resync has finished, collect result */ | |
9385 | md_unregister_thread(&mddev->sync_thread); | |
9386 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
0d8ed0e9 GJ |
9387 | !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery) && |
9388 | mddev->degraded != mddev->raid_disks) { | |
a91d5ac0 JB |
9389 | /* success...*/ |
9390 | /* activate any spares */ | |
9391 | if (mddev->pers->spare_active(mddev)) { | |
e1a86dbb | 9392 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
2953079c | 9393 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a91d5ac0 JB |
9394 | } |
9395 | } | |
9396 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
aefb2e5f | 9397 | mddev->pers->finish_reshape) { |
a91d5ac0 | 9398 | mddev->pers->finish_reshape(mddev); |
aefb2e5f GJ |
9399 | if (mddev_is_clustered(mddev)) |
9400 | is_reshaped = true; | |
9401 | } | |
a91d5ac0 JB |
9402 | |
9403 | /* If array is no-longer degraded, then any saved_raid_disk | |
f466722c | 9404 | * information must be scrapped. |
a91d5ac0 | 9405 | */ |
f466722c N |
9406 | if (!mddev->degraded) |
9407 | rdev_for_each(rdev, mddev) | |
a91d5ac0 JB |
9408 | rdev->saved_raid_disk = -1; |
9409 | ||
9410 | md_update_sb(mddev, 1); | |
2953079c | 9411 | /* MD_SB_CHANGE_PENDING should be cleared by md_update_sb, so we can |
bb8bf15b GJ |
9412 | * call resync_finish here if MD_CLUSTER_RESYNC_LOCKED is set by |
9413 | * clustered raid */ | |
9414 | if (test_and_clear_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags)) | |
9415 | md_cluster_ops->resync_finish(mddev); | |
a91d5ac0 | 9416 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
ea358cd0 | 9417 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); |
a91d5ac0 JB |
9418 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9419 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9420 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9421 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
aefb2e5f GJ |
9422 | /* |
9423 | * We call md_cluster_ops->update_size here because sync_size could | |
9424 | * be changed by md_update_sb, and MD_RECOVERY_RESHAPE is cleared, | |
9425 | * so it is time to update size across cluster. | |
9426 | */ | |
9427 | if (mddev_is_clustered(mddev) && is_reshaped | |
9428 | && !test_bit(MD_CLOSING, &mddev->flags)) | |
9429 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
f851b60d | 9430 | wake_up(&resync_wait); |
a91d5ac0 JB |
9431 | /* flag recovery needed just to double check */ |
9432 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9433 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9434 | md_new_event(mddev); | |
9435 | if (mddev->event_work.func) | |
9436 | queue_work(md_misc_wq, &mddev->event_work); | |
9437 | } | |
6c144d31 | 9438 | EXPORT_SYMBOL(md_reap_sync_thread); |
a91d5ac0 | 9439 | |
fd01b88c | 9440 | void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev) |
6bfe0b49 | 9441 | { |
00bcb4ac | 9442 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
6bfe0b49 | 9443 | wait_event_timeout(rdev->blocked_wait, |
de393cde N |
9444 | !test_bit(Blocked, &rdev->flags) && |
9445 | !test_bit(BlockedBadBlocks, &rdev->flags), | |
6bfe0b49 DW |
9446 | msecs_to_jiffies(5000)); |
9447 | rdev_dec_pending(rdev, mddev); | |
9448 | } | |
9449 | EXPORT_SYMBOL(md_wait_for_blocked_rdev); | |
9450 | ||
c6563a8c N |
9451 | void md_finish_reshape(struct mddev *mddev) |
9452 | { | |
9453 | /* called be personality module when reshape completes. */ | |
9454 | struct md_rdev *rdev; | |
9455 | ||
9456 | rdev_for_each(rdev, mddev) { | |
9457 | if (rdev->data_offset > rdev->new_data_offset) | |
9458 | rdev->sectors += rdev->data_offset - rdev->new_data_offset; | |
9459 | else | |
9460 | rdev->sectors -= rdev->new_data_offset - rdev->data_offset; | |
9461 | rdev->data_offset = rdev->new_data_offset; | |
9462 | } | |
9463 | } | |
9464 | EXPORT_SYMBOL(md_finish_reshape); | |
2230dfe4 | 9465 | |
fc974ee2 | 9466 | /* Bad block management */ |
2230dfe4 | 9467 | |
fc974ee2 | 9468 | /* Returns 1 on success, 0 on failure */ |
3cb03002 | 9469 | int rdev_set_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
c6563a8c | 9470 | int is_new) |
2230dfe4 | 9471 | { |
85ad1d13 | 9472 | struct mddev *mddev = rdev->mddev; |
c6563a8c N |
9473 | int rv; |
9474 | if (is_new) | |
9475 | s += rdev->new_data_offset; | |
9476 | else | |
9477 | s += rdev->data_offset; | |
fc974ee2 VV |
9478 | rv = badblocks_set(&rdev->badblocks, s, sectors, 0); |
9479 | if (rv == 0) { | |
2230dfe4 | 9480 | /* Make sure they get written out promptly */ |
35b785f7 | 9481 | if (test_bit(ExternalBbl, &rdev->flags)) |
e1a86dbb | 9482 | sysfs_notify_dirent_safe(rdev->sysfs_unack_badblocks); |
8bd2f0a0 | 9483 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
2953079c SL |
9484 | set_mask_bits(&mddev->sb_flags, 0, |
9485 | BIT(MD_SB_CHANGE_CLEAN) | BIT(MD_SB_CHANGE_PENDING)); | |
2230dfe4 | 9486 | md_wakeup_thread(rdev->mddev->thread); |
fc974ee2 VV |
9487 | return 1; |
9488 | } else | |
9489 | return 0; | |
2230dfe4 N |
9490 | } |
9491 | EXPORT_SYMBOL_GPL(rdev_set_badblocks); | |
9492 | ||
c6563a8c N |
9493 | int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
9494 | int is_new) | |
2230dfe4 | 9495 | { |
35b785f7 | 9496 | int rv; |
c6563a8c N |
9497 | if (is_new) |
9498 | s += rdev->new_data_offset; | |
9499 | else | |
9500 | s += rdev->data_offset; | |
35b785f7 TM |
9501 | rv = badblocks_clear(&rdev->badblocks, s, sectors); |
9502 | if ((rv == 0) && test_bit(ExternalBbl, &rdev->flags)) | |
e1a86dbb | 9503 | sysfs_notify_dirent_safe(rdev->sysfs_badblocks); |
35b785f7 | 9504 | return rv; |
2230dfe4 N |
9505 | } |
9506 | EXPORT_SYMBOL_GPL(rdev_clear_badblocks); | |
9507 | ||
75c96f85 AB |
9508 | static int md_notify_reboot(struct notifier_block *this, |
9509 | unsigned long code, void *x) | |
1da177e4 LT |
9510 | { |
9511 | struct list_head *tmp; | |
fd01b88c | 9512 | struct mddev *mddev; |
2dba6a91 | 9513 | int need_delay = 0; |
1da177e4 | 9514 | |
c744a65c N |
9515 | for_each_mddev(mddev, tmp) { |
9516 | if (mddev_trylock(mddev)) { | |
30b8aa91 N |
9517 | if (mddev->pers) |
9518 | __md_stop_writes(mddev); | |
0f62fb22 N |
9519 | if (mddev->persistent) |
9520 | mddev->safemode = 2; | |
c744a65c | 9521 | mddev_unlock(mddev); |
2dba6a91 | 9522 | } |
c744a65c | 9523 | need_delay = 1; |
1da177e4 | 9524 | } |
c744a65c N |
9525 | /* |
9526 | * certain more exotic SCSI devices are known to be | |
9527 | * volatile wrt too early system reboots. While the | |
9528 | * right place to handle this issue is the given | |
9529 | * driver, we do want to have a safe RAID driver ... | |
9530 | */ | |
9531 | if (need_delay) | |
9532 | mdelay(1000*1); | |
9533 | ||
1da177e4 LT |
9534 | return NOTIFY_DONE; |
9535 | } | |
9536 | ||
75c96f85 | 9537 | static struct notifier_block md_notifier = { |
1da177e4 LT |
9538 | .notifier_call = md_notify_reboot, |
9539 | .next = NULL, | |
9540 | .priority = INT_MAX, /* before any real devices */ | |
9541 | }; | |
9542 | ||
9543 | static void md_geninit(void) | |
9544 | { | |
36a4e1fe | 9545 | pr_debug("md: sizeof(mdp_super_t) = %d\n", (int)sizeof(mdp_super_t)); |
1da177e4 | 9546 | |
97a32539 | 9547 | proc_create("mdstat", S_IRUGO, NULL, &mdstat_proc_ops); |
1da177e4 LT |
9548 | } |
9549 | ||
75c96f85 | 9550 | static int __init md_init(void) |
1da177e4 | 9551 | { |
e804ac78 TH |
9552 | int ret = -ENOMEM; |
9553 | ||
ada609ee | 9554 | md_wq = alloc_workqueue("md", WQ_MEM_RECLAIM, 0); |
e804ac78 TH |
9555 | if (!md_wq) |
9556 | goto err_wq; | |
9557 | ||
9558 | md_misc_wq = alloc_workqueue("md_misc", 0, 0); | |
9559 | if (!md_misc_wq) | |
9560 | goto err_misc_wq; | |
9561 | ||
cc1ffe61 | 9562 | md_rdev_misc_wq = alloc_workqueue("md_rdev_misc", 0, 0); |
cf0b9b48 | 9563 | if (!md_rdev_misc_wq) |
cc1ffe61 GJ |
9564 | goto err_rdev_misc_wq; |
9565 | ||
28144f99 CH |
9566 | ret = __register_blkdev(MD_MAJOR, "md", md_probe); |
9567 | if (ret < 0) | |
e804ac78 TH |
9568 | goto err_md; |
9569 | ||
28144f99 CH |
9570 | ret = __register_blkdev(0, "mdp", md_probe); |
9571 | if (ret < 0) | |
e804ac78 TH |
9572 | goto err_mdp; |
9573 | mdp_major = ret; | |
9574 | ||
1da177e4 | 9575 | register_reboot_notifier(&md_notifier); |
0b4d4147 | 9576 | raid_table_header = register_sysctl_table(raid_root_table); |
1da177e4 LT |
9577 | |
9578 | md_geninit(); | |
d710e138 | 9579 | return 0; |
1da177e4 | 9580 | |
e804ac78 TH |
9581 | err_mdp: |
9582 | unregister_blkdev(MD_MAJOR, "md"); | |
9583 | err_md: | |
cc1ffe61 GJ |
9584 | destroy_workqueue(md_rdev_misc_wq); |
9585 | err_rdev_misc_wq: | |
e804ac78 TH |
9586 | destroy_workqueue(md_misc_wq); |
9587 | err_misc_wq: | |
9588 | destroy_workqueue(md_wq); | |
9589 | err_wq: | |
9590 | return ret; | |
9591 | } | |
1da177e4 | 9592 | |
70bcecdb | 9593 | static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev) |
1d7e3e96 | 9594 | { |
70bcecdb GR |
9595 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
9596 | struct md_rdev *rdev2; | |
9597 | int role, ret; | |
9598 | char b[BDEVNAME_SIZE]; | |
1d7e3e96 | 9599 | |
818da59f GJ |
9600 | /* |
9601 | * If size is changed in another node then we need to | |
9602 | * do resize as well. | |
9603 | */ | |
9604 | if (mddev->dev_sectors != le64_to_cpu(sb->size)) { | |
9605 | ret = mddev->pers->resize(mddev, le64_to_cpu(sb->size)); | |
9606 | if (ret) | |
9607 | pr_info("md-cluster: resize failed\n"); | |
9608 | else | |
e64e4018 | 9609 | md_bitmap_update_sb(mddev->bitmap); |
818da59f GJ |
9610 | } |
9611 | ||
70bcecdb GR |
9612 | /* Check for change of roles in the active devices */ |
9613 | rdev_for_each(rdev2, mddev) { | |
9614 | if (test_bit(Faulty, &rdev2->flags)) | |
9615 | continue; | |
9616 | ||
9617 | /* Check if the roles changed */ | |
9618 | role = le16_to_cpu(sb->dev_roles[rdev2->desc_nr]); | |
dbb64f86 GR |
9619 | |
9620 | if (test_bit(Candidate, &rdev2->flags)) { | |
9621 | if (role == 0xfffe) { | |
9622 | pr_info("md: Removing Candidate device %s because add failed\n", bdevname(rdev2->bdev,b)); | |
9623 | md_kick_rdev_from_array(rdev2); | |
9624 | continue; | |
9625 | } | |
9626 | else | |
9627 | clear_bit(Candidate, &rdev2->flags); | |
9628 | } | |
9629 | ||
70bcecdb | 9630 | if (role != rdev2->raid_disk) { |
ca1e98e0 GJ |
9631 | /* |
9632 | * got activated except reshape is happening. | |
9633 | */ | |
9634 | if (rdev2->raid_disk == -1 && role != 0xffff && | |
9635 | !(le32_to_cpu(sb->feature_map) & | |
9636 | MD_FEATURE_RESHAPE_ACTIVE)) { | |
70bcecdb GR |
9637 | rdev2->saved_raid_disk = role; |
9638 | ret = remove_and_add_spares(mddev, rdev2); | |
9639 | pr_info("Activated spare: %s\n", | |
9d48739e | 9640 | bdevname(rdev2->bdev,b)); |
a578183e GJ |
9641 | /* wakeup mddev->thread here, so array could |
9642 | * perform resync with the new activated disk */ | |
9643 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9644 | md_wakeup_thread(mddev->thread); | |
70bcecdb GR |
9645 | } |
9646 | /* device faulty | |
9647 | * We just want to do the minimum to mark the disk | |
9648 | * as faulty. The recovery is performed by the | |
9649 | * one who initiated the error. | |
9650 | */ | |
9651 | if ((role == 0xfffe) || (role == 0xfffd)) { | |
9652 | md_error(mddev, rdev2); | |
9653 | clear_bit(Blocked, &rdev2->flags); | |
9654 | } | |
9655 | } | |
1d7e3e96 | 9656 | } |
70bcecdb | 9657 | |
a8da01f7 ZH |
9658 | if (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) { |
9659 | ret = update_raid_disks(mddev, le32_to_cpu(sb->raid_disks)); | |
9660 | if (ret) | |
9661 | pr_warn("md: updating array disks failed. %d\n", ret); | |
9662 | } | |
70bcecdb | 9663 | |
7564beda GJ |
9664 | /* |
9665 | * Since mddev->delta_disks has already updated in update_raid_disks, | |
9666 | * so it is time to check reshape. | |
9667 | */ | |
9668 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9669 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9670 | /* | |
9671 | * reshape is happening in the remote node, we need to | |
9672 | * update reshape_position and call start_reshape. | |
9673 | */ | |
ed4d0a4e | 9674 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); |
7564beda GJ |
9675 | if (mddev->pers->update_reshape_pos) |
9676 | mddev->pers->update_reshape_pos(mddev); | |
9677 | if (mddev->pers->start_reshape) | |
9678 | mddev->pers->start_reshape(mddev); | |
9679 | } else if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9680 | mddev->reshape_position != MaxSector && | |
9681 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9682 | /* reshape is just done in another node. */ | |
9683 | mddev->reshape_position = MaxSector; | |
9684 | if (mddev->pers->update_reshape_pos) | |
9685 | mddev->pers->update_reshape_pos(mddev); | |
9686 | } | |
9687 | ||
70bcecdb GR |
9688 | /* Finally set the event to be up to date */ |
9689 | mddev->events = le64_to_cpu(sb->events); | |
9690 | } | |
9691 | ||
9692 | static int read_rdev(struct mddev *mddev, struct md_rdev *rdev) | |
9693 | { | |
9694 | int err; | |
9695 | struct page *swapout = rdev->sb_page; | |
9696 | struct mdp_superblock_1 *sb; | |
9697 | ||
9698 | /* Store the sb page of the rdev in the swapout temporary | |
9699 | * variable in case we err in the future | |
9700 | */ | |
9701 | rdev->sb_page = NULL; | |
7f0f0d87 N |
9702 | err = alloc_disk_sb(rdev); |
9703 | if (err == 0) { | |
9704 | ClearPageUptodate(rdev->sb_page); | |
9705 | rdev->sb_loaded = 0; | |
9706 | err = super_types[mddev->major_version]. | |
9707 | load_super(rdev, NULL, mddev->minor_version); | |
9708 | } | |
70bcecdb GR |
9709 | if (err < 0) { |
9710 | pr_warn("%s: %d Could not reload rdev(%d) err: %d. Restoring old values\n", | |
9711 | __func__, __LINE__, rdev->desc_nr, err); | |
7f0f0d87 N |
9712 | if (rdev->sb_page) |
9713 | put_page(rdev->sb_page); | |
70bcecdb GR |
9714 | rdev->sb_page = swapout; |
9715 | rdev->sb_loaded = 1; | |
9716 | return err; | |
1d7e3e96 GR |
9717 | } |
9718 | ||
70bcecdb GR |
9719 | sb = page_address(rdev->sb_page); |
9720 | /* Read the offset unconditionally, even if MD_FEATURE_RECOVERY_OFFSET | |
9721 | * is not set | |
9722 | */ | |
9723 | ||
9724 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)) | |
9725 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); | |
9726 | ||
9727 | /* The other node finished recovery, call spare_active to set | |
9728 | * device In_sync and mddev->degraded | |
9729 | */ | |
9730 | if (rdev->recovery_offset == MaxSector && | |
9731 | !test_bit(In_sync, &rdev->flags) && | |
9732 | mddev->pers->spare_active(mddev)) | |
e1a86dbb | 9733 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
70bcecdb GR |
9734 | |
9735 | put_page(swapout); | |
9736 | return 0; | |
9737 | } | |
9738 | ||
9739 | void md_reload_sb(struct mddev *mddev, int nr) | |
9740 | { | |
9741 | struct md_rdev *rdev; | |
9742 | int err; | |
9743 | ||
9744 | /* Find the rdev */ | |
9745 | rdev_for_each_rcu(rdev, mddev) { | |
9746 | if (rdev->desc_nr == nr) | |
9747 | break; | |
9748 | } | |
9749 | ||
9750 | if (!rdev || rdev->desc_nr != nr) { | |
9751 | pr_warn("%s: %d Could not find rdev with nr %d\n", __func__, __LINE__, nr); | |
9752 | return; | |
9753 | } | |
9754 | ||
9755 | err = read_rdev(mddev, rdev); | |
9756 | if (err < 0) | |
9757 | return; | |
9758 | ||
9759 | check_sb_changes(mddev, rdev); | |
9760 | ||
9761 | /* Read all rdev's to update recovery_offset */ | |
0ea9924a GJ |
9762 | rdev_for_each_rcu(rdev, mddev) { |
9763 | if (!test_bit(Faulty, &rdev->flags)) | |
9764 | read_rdev(mddev, rdev); | |
9765 | } | |
1d7e3e96 GR |
9766 | } |
9767 | EXPORT_SYMBOL(md_reload_sb); | |
9768 | ||
1da177e4 LT |
9769 | #ifndef MODULE |
9770 | ||
9771 | /* | |
9772 | * Searches all registered partitions for autorun RAID arrays | |
9773 | * at boot time. | |
9774 | */ | |
4d936ec1 | 9775 | |
5b1f5bc3 | 9776 | static DEFINE_MUTEX(detected_devices_mutex); |
4d936ec1 ME |
9777 | static LIST_HEAD(all_detected_devices); |
9778 | struct detected_devices_node { | |
9779 | struct list_head list; | |
9780 | dev_t dev; | |
9781 | }; | |
1da177e4 LT |
9782 | |
9783 | void md_autodetect_dev(dev_t dev) | |
9784 | { | |
4d936ec1 ME |
9785 | struct detected_devices_node *node_detected_dev; |
9786 | ||
9787 | node_detected_dev = kzalloc(sizeof(*node_detected_dev), GFP_KERNEL); | |
9788 | if (node_detected_dev) { | |
9789 | node_detected_dev->dev = dev; | |
5b1f5bc3 | 9790 | mutex_lock(&detected_devices_mutex); |
4d936ec1 | 9791 | list_add_tail(&node_detected_dev->list, &all_detected_devices); |
5b1f5bc3 | 9792 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9793 | } |
1da177e4 LT |
9794 | } |
9795 | ||
d82fa81c | 9796 | void md_autostart_arrays(int part) |
1da177e4 | 9797 | { |
3cb03002 | 9798 | struct md_rdev *rdev; |
4d936ec1 ME |
9799 | struct detected_devices_node *node_detected_dev; |
9800 | dev_t dev; | |
9801 | int i_scanned, i_passed; | |
1da177e4 | 9802 | |
4d936ec1 ME |
9803 | i_scanned = 0; |
9804 | i_passed = 0; | |
1da177e4 | 9805 | |
9d48739e | 9806 | pr_info("md: Autodetecting RAID arrays.\n"); |
1da177e4 | 9807 | |
5b1f5bc3 | 9808 | mutex_lock(&detected_devices_mutex); |
4d936ec1 ME |
9809 | while (!list_empty(&all_detected_devices) && i_scanned < INT_MAX) { |
9810 | i_scanned++; | |
9811 | node_detected_dev = list_entry(all_detected_devices.next, | |
9812 | struct detected_devices_node, list); | |
9813 | list_del(&node_detected_dev->list); | |
9814 | dev = node_detected_dev->dev; | |
9815 | kfree(node_detected_dev); | |
90bcf133 | 9816 | mutex_unlock(&detected_devices_mutex); |
df968c4e | 9817 | rdev = md_import_device(dev,0, 90); |
90bcf133 | 9818 | mutex_lock(&detected_devices_mutex); |
1da177e4 LT |
9819 | if (IS_ERR(rdev)) |
9820 | continue; | |
9821 | ||
403df478 | 9822 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 9823 | continue; |
403df478 | 9824 | |
d0fae18f | 9825 | set_bit(AutoDetected, &rdev->flags); |
1da177e4 | 9826 | list_add(&rdev->same_set, &pending_raid_disks); |
4d936ec1 | 9827 | i_passed++; |
1da177e4 | 9828 | } |
5b1f5bc3 | 9829 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9830 | |
9d48739e | 9831 | pr_debug("md: Scanned %d and added %d devices.\n", i_scanned, i_passed); |
1da177e4 LT |
9832 | |
9833 | autorun_devices(part); | |
9834 | } | |
9835 | ||
fdee8ae4 | 9836 | #endif /* !MODULE */ |
1da177e4 LT |
9837 | |
9838 | static __exit void md_exit(void) | |
9839 | { | |
fd01b88c | 9840 | struct mddev *mddev; |
1da177e4 | 9841 | struct list_head *tmp; |
e2f23b60 | 9842 | int delay = 1; |
8ab5e4c1 | 9843 | |
3dbd8c2e | 9844 | unregister_blkdev(MD_MAJOR,"md"); |
1da177e4 LT |
9845 | unregister_blkdev(mdp_major, "mdp"); |
9846 | unregister_reboot_notifier(&md_notifier); | |
9847 | unregister_sysctl_table(raid_table_header); | |
e2f23b60 N |
9848 | |
9849 | /* We cannot unload the modules while some process is | |
9850 | * waiting for us in select() or poll() - wake them up | |
9851 | */ | |
9852 | md_unloading = 1; | |
9853 | while (waitqueue_active(&md_event_waiters)) { | |
9854 | /* not safe to leave yet */ | |
9855 | wake_up(&md_event_waiters); | |
9856 | msleep(delay); | |
9857 | delay += delay; | |
9858 | } | |
1da177e4 | 9859 | remove_proc_entry("mdstat", NULL); |
e2f23b60 | 9860 | |
29ac4aa3 | 9861 | for_each_mddev(mddev, tmp) { |
1da177e4 | 9862 | export_array(mddev); |
9356863c | 9863 | mddev->ctime = 0; |
d3374825 | 9864 | mddev->hold_active = 0; |
9356863c N |
9865 | /* |
9866 | * for_each_mddev() will call mddev_put() at the end of each | |
9867 | * iteration. As the mddev is now fully clear, this will | |
9868 | * schedule the mddev for destruction by a workqueue, and the | |
9869 | * destroy_workqueue() below will wait for that to complete. | |
9870 | */ | |
1da177e4 | 9871 | } |
cc1ffe61 | 9872 | destroy_workqueue(md_rdev_misc_wq); |
e804ac78 TH |
9873 | destroy_workqueue(md_misc_wq); |
9874 | destroy_workqueue(md_wq); | |
1da177e4 LT |
9875 | } |
9876 | ||
685784aa | 9877 | subsys_initcall(md_init); |
1da177e4 LT |
9878 | module_exit(md_exit) |
9879 | ||
e4dca7b7 | 9880 | static int get_ro(char *buffer, const struct kernel_param *kp) |
f91de92e | 9881 | { |
3f99980c | 9882 | return sprintf(buffer, "%d\n", start_readonly); |
f91de92e | 9883 | } |
e4dca7b7 | 9884 | static int set_ro(const char *val, const struct kernel_param *kp) |
f91de92e | 9885 | { |
4c9309c0 | 9886 | return kstrtouint(val, 10, (unsigned int *)&start_readonly); |
f91de92e N |
9887 | } |
9888 | ||
80ca3a44 N |
9889 | module_param_call(start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR); |
9890 | module_param(start_dirty_degraded, int, S_IRUGO|S_IWUSR); | |
efeb53c0 | 9891 | module_param_call(new_array, add_named_array, NULL, NULL, S_IWUSR); |
78b6350d | 9892 | module_param(create_on_open, bool, S_IRUSR|S_IWUSR); |
f91de92e | 9893 | |
1da177e4 | 9894 | MODULE_LICENSE("GPL"); |
0efb9e61 | 9895 | MODULE_DESCRIPTION("MD RAID framework"); |
aa1595e9 | 9896 | MODULE_ALIAS("md"); |
72008652 | 9897 | MODULE_ALIAS_BLOCKDEV_MAJOR(MD_MAJOR); |