]>
Commit | Line | Data |
---|---|---|
af1a8899 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | md.c : Multiple Devices driver for Linux | |
f72ffdd6 | 4 | Copyright (C) 1998, 1999, 2000 Ingo Molnar |
1da177e4 LT |
5 | |
6 | completely rewritten, based on the MD driver code from Marc Zyngier | |
7 | ||
8 | Changes: | |
9 | ||
10 | - RAID-1/RAID-5 extensions by Miguel de Icaza, Gadi Oxman, Ingo Molnar | |
11 | - RAID-6 extensions by H. Peter Anvin <hpa@zytor.com> | |
12 | - boot support for linear and striped mode by Harald Hoyer <HarryH@Royal.Net> | |
13 | - kerneld support by Boris Tobotras <boris@xtalk.msk.su> | |
14 | - kmod support by: Cyrus Durgin | |
15 | - RAID0 bugfixes: Mark Anthony Lisher <markal@iname.com> | |
16 | - Devfs support by Richard Gooch <rgooch@atnf.csiro.au> | |
17 | ||
18 | - lots of fixes and improvements to the RAID1/RAID5 and generic | |
19 | RAID code (such as request based resynchronization): | |
20 | ||
21 | Neil Brown <neilb@cse.unsw.edu.au>. | |
22 | ||
32a7627c N |
23 | - persistent bitmap code |
24 | Copyright (C) 2003-2004, Paul Clements, SteelEye Technology, Inc. | |
25 | ||
9d48739e N |
26 | |
27 | Errors, Warnings, etc. | |
28 | Please use: | |
29 | pr_crit() for error conditions that risk data loss | |
30 | pr_err() for error conditions that are unexpected, like an IO error | |
31 | or internal inconsistency | |
32 | pr_warn() for error conditions that could have been predicated, like | |
33 | adding a device to an array when it has incompatible metadata | |
34 | pr_info() for every interesting, very rare events, like an array starting | |
35 | or stopping, or resync starting or stopping | |
36 | pr_debug() for everything else. | |
37 | ||
1da177e4 LT |
38 | */ |
39 | ||
963c555e | 40 | #include <linux/sched/mm.h> |
3f07c014 | 41 | #include <linux/sched/signal.h> |
a6fb0934 | 42 | #include <linux/kthread.h> |
bff61975 | 43 | #include <linux/blkdev.h> |
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 | |
8b57251f CH |
737 | static struct mddev *mddev_find_locked(dev_t unit) |
738 | { | |
739 | struct mddev *mddev; | |
740 | ||
741 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
742 | if (mddev->unit == unit) | |
743 | return mddev; | |
744 | ||
745 | return NULL; | |
746 | } | |
747 | ||
85c8c3c1 CH |
748 | /* find an unused unit number */ |
749 | static dev_t mddev_alloc_unit(void) | |
750 | { | |
751 | static int next_minor = 512; | |
752 | int start = next_minor; | |
753 | bool is_free = 0; | |
754 | dev_t dev = 0; | |
755 | ||
756 | while (!is_free) { | |
757 | dev = MKDEV(MD_MAJOR, next_minor); | |
758 | next_minor++; | |
759 | if (next_minor > MINORMASK) | |
760 | next_minor = 0; | |
761 | if (next_minor == start) | |
762 | return 0; /* Oh dear, all in use. */ | |
763 | is_free = !mddev_find_locked(dev); | |
764 | } | |
765 | ||
766 | return dev; | |
767 | } | |
768 | ||
f72ffdd6 | 769 | static struct mddev *mddev_find(dev_t unit) |
65aa97c4 CH |
770 | { |
771 | struct mddev *mddev; | |
772 | ||
773 | if (MAJOR(unit) != MD_MAJOR) | |
774 | unit &= ~((1 << MdpMinorShift) - 1); | |
775 | ||
776 | spin_lock(&all_mddevs_lock); | |
777 | mddev = mddev_find_locked(unit); | |
778 | if (mddev) | |
779 | mddev_get(mddev); | |
780 | spin_unlock(&all_mddevs_lock); | |
781 | ||
782 | return mddev; | |
783 | } | |
784 | ||
0d809b38 | 785 | static struct mddev *mddev_alloc(dev_t unit) |
1da177e4 | 786 | { |
0d809b38 CH |
787 | struct mddev *new; |
788 | int error; | |
1da177e4 | 789 | |
8f5f02c4 | 790 | if (unit && MAJOR(unit) != MD_MAJOR) |
d144fe6f | 791 | unit &= ~((1 << MdpMinorShift) - 1); |
8f5f02c4 | 792 | |
d144fe6f CH |
793 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
794 | if (!new) | |
0d809b38 | 795 | return ERR_PTR(-ENOMEM); |
d144fe6f | 796 | mddev_init(new); |
efeb53c0 | 797 | |
d144fe6f | 798 | spin_lock(&all_mddevs_lock); |
efeb53c0 | 799 | if (unit) { |
0d809b38 CH |
800 | error = -EEXIST; |
801 | if (mddev_find_locked(unit)) | |
d144fe6f | 802 | goto out_free_new; |
d144fe6f CH |
803 | new->unit = unit; |
804 | if (MAJOR(unit) == MD_MAJOR) | |
805 | new->md_minor = MINOR(unit); | |
806 | else | |
807 | new->md_minor = MINOR(unit) >> MdpMinorShift; | |
808 | new->hold_active = UNTIL_IOCTL; | |
809 | } else { | |
0d809b38 | 810 | error = -ENODEV; |
85c8c3c1 | 811 | new->unit = mddev_alloc_unit(); |
d144fe6f CH |
812 | if (!new->unit) |
813 | goto out_free_new; | |
85c8c3c1 | 814 | new->md_minor = MINOR(new->unit); |
efeb53c0 | 815 | new->hold_active = UNTIL_STOP; |
1da177e4 | 816 | } |
1da177e4 | 817 | |
d144fe6f CH |
818 | list_add(&new->all_mddevs, &all_mddevs); |
819 | spin_unlock(&all_mddevs_lock); | |
820 | return new; | |
821 | out_free_new: | |
822 | spin_unlock(&all_mddevs_lock); | |
823 | kfree(new); | |
0d809b38 | 824 | return ERR_PTR(error); |
1da177e4 LT |
825 | } |
826 | ||
b6eb127d N |
827 | static struct attribute_group md_redundancy_group; |
828 | ||
5c47daf6 | 829 | void mddev_unlock(struct mddev *mddev) |
1da177e4 | 830 | { |
a64c876f | 831 | if (mddev->to_remove) { |
b6eb127d N |
832 | /* These cannot be removed under reconfig_mutex as |
833 | * an access to the files will try to take reconfig_mutex | |
834 | * while holding the file unremovable, which leads to | |
835 | * a deadlock. | |
bb4f1e9d N |
836 | * So hold set sysfs_active while the remove in happeing, |
837 | * and anything else which might set ->to_remove or my | |
838 | * otherwise change the sysfs namespace will fail with | |
839 | * -EBUSY if sysfs_active is still set. | |
840 | * We set sysfs_active under reconfig_mutex and elsewhere | |
841 | * test it under the same mutex to ensure its correct value | |
842 | * is seen. | |
b6eb127d | 843 | */ |
a64c876f N |
844 | struct attribute_group *to_remove = mddev->to_remove; |
845 | mddev->to_remove = NULL; | |
bb4f1e9d | 846 | mddev->sysfs_active = 1; |
b6eb127d N |
847 | mutex_unlock(&mddev->reconfig_mutex); |
848 | ||
00bcb4ac N |
849 | if (mddev->kobj.sd) { |
850 | if (to_remove != &md_redundancy_group) | |
851 | sysfs_remove_group(&mddev->kobj, to_remove); | |
852 | if (mddev->pers == NULL || | |
853 | mddev->pers->sync_request == NULL) { | |
854 | sysfs_remove_group(&mddev->kobj, &md_redundancy_group); | |
855 | if (mddev->sysfs_action) | |
856 | sysfs_put(mddev->sysfs_action); | |
e8efa9b8 JB |
857 | if (mddev->sysfs_completed) |
858 | sysfs_put(mddev->sysfs_completed); | |
859 | if (mddev->sysfs_degraded) | |
860 | sysfs_put(mddev->sysfs_degraded); | |
00bcb4ac | 861 | mddev->sysfs_action = NULL; |
e8efa9b8 JB |
862 | mddev->sysfs_completed = NULL; |
863 | mddev->sysfs_degraded = NULL; | |
00bcb4ac | 864 | } |
a64c876f | 865 | } |
bb4f1e9d | 866 | mddev->sysfs_active = 0; |
b6eb127d N |
867 | } else |
868 | mutex_unlock(&mddev->reconfig_mutex); | |
1da177e4 | 869 | |
751e67ca CD |
870 | /* As we've dropped the mutex we need a spinlock to |
871 | * make sure the thread doesn't disappear | |
01f96c0a N |
872 | */ |
873 | spin_lock(&pers_lock); | |
005eca5e | 874 | md_wakeup_thread(mddev->thread); |
4d5324f7 | 875 | wake_up(&mddev->sb_wait); |
01f96c0a | 876 | spin_unlock(&pers_lock); |
1da177e4 | 877 | } |
5c47daf6 | 878 | EXPORT_SYMBOL_GPL(mddev_unlock); |
1da177e4 | 879 | |
57d051dc | 880 | struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr) |
1ca69c4b N |
881 | { |
882 | struct md_rdev *rdev; | |
883 | ||
884 | rdev_for_each_rcu(rdev, mddev) | |
885 | if (rdev->desc_nr == nr) | |
886 | return rdev; | |
887 | ||
888 | return NULL; | |
889 | } | |
57d051dc | 890 | EXPORT_SYMBOL_GPL(md_find_rdev_nr_rcu); |
1ca69c4b N |
891 | |
892 | static struct md_rdev *find_rdev(struct mddev *mddev, dev_t dev) | |
1da177e4 | 893 | { |
3cb03002 | 894 | struct md_rdev *rdev; |
1da177e4 | 895 | |
dafb20fa | 896 | rdev_for_each(rdev, mddev) |
1da177e4 LT |
897 | if (rdev->bdev->bd_dev == dev) |
898 | return rdev; | |
159ec1fc | 899 | |
1da177e4 LT |
900 | return NULL; |
901 | } | |
902 | ||
1532d9e8 | 903 | struct md_rdev *md_find_rdev_rcu(struct mddev *mddev, dev_t dev) |
1ca69c4b N |
904 | { |
905 | struct md_rdev *rdev; | |
906 | ||
907 | rdev_for_each_rcu(rdev, mddev) | |
908 | if (rdev->bdev->bd_dev == dev) | |
909 | return rdev; | |
910 | ||
911 | return NULL; | |
912 | } | |
1532d9e8 | 913 | EXPORT_SYMBOL_GPL(md_find_rdev_rcu); |
1ca69c4b | 914 | |
84fc4b56 | 915 | static struct md_personality *find_pers(int level, char *clevel) |
2604b703 | 916 | { |
84fc4b56 | 917 | struct md_personality *pers; |
d9d166c2 N |
918 | list_for_each_entry(pers, &pers_list, list) { |
919 | if (level != LEVEL_NONE && pers->level == level) | |
2604b703 | 920 | return pers; |
d9d166c2 N |
921 | if (strcmp(pers->name, clevel)==0) |
922 | return pers; | |
923 | } | |
2604b703 N |
924 | return NULL; |
925 | } | |
926 | ||
b73df2d3 | 927 | /* return the offset of the super block in 512byte sectors */ |
3cb03002 | 928 | static inline sector_t calc_dev_sboffset(struct md_rdev *rdev) |
1da177e4 | 929 | { |
57b2caa3 | 930 | sector_t num_sectors = i_size_read(rdev->bdev->bd_inode) / 512; |
b73df2d3 | 931 | return MD_NEW_SIZE_SECTORS(num_sectors); |
1da177e4 LT |
932 | } |
933 | ||
f72ffdd6 | 934 | static int alloc_disk_sb(struct md_rdev *rdev) |
1da177e4 | 935 | { |
1da177e4 | 936 | rdev->sb_page = alloc_page(GFP_KERNEL); |
7f0f0d87 | 937 | if (!rdev->sb_page) |
ebc24337 | 938 | return -ENOMEM; |
1da177e4 LT |
939 | return 0; |
940 | } | |
941 | ||
545c8795 | 942 | void md_rdev_clear(struct md_rdev *rdev) |
1da177e4 LT |
943 | { |
944 | if (rdev->sb_page) { | |
2d1f3b5d | 945 | put_page(rdev->sb_page); |
1da177e4 LT |
946 | rdev->sb_loaded = 0; |
947 | rdev->sb_page = NULL; | |
0f420358 | 948 | rdev->sb_start = 0; |
dd8ac336 | 949 | rdev->sectors = 0; |
1da177e4 | 950 | } |
2699b672 N |
951 | if (rdev->bb_page) { |
952 | put_page(rdev->bb_page); | |
953 | rdev->bb_page = NULL; | |
954 | } | |
d3b407fb | 955 | badblocks_exit(&rdev->badblocks); |
1da177e4 | 956 | } |
545c8795 | 957 | EXPORT_SYMBOL_GPL(md_rdev_clear); |
1da177e4 | 958 | |
4246a0b6 | 959 | static void super_written(struct bio *bio) |
7bfa19f2 | 960 | { |
3cb03002 | 961 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 962 | struct mddev *mddev = rdev->mddev; |
7bfa19f2 | 963 | |
4e4cbee9 | 964 | if (bio->bi_status) { |
b3db8a21 GJ |
965 | pr_err("md: %s gets error=%d\n", __func__, |
966 | blk_status_to_errno(bio->bi_status)); | |
a9701a30 | 967 | md_error(mddev, rdev); |
46533ff7 N |
968 | if (!test_bit(Faulty, &rdev->flags) |
969 | && (bio->bi_opf & MD_FAILFAST)) { | |
2953079c | 970 | set_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags); |
46533ff7 N |
971 | set_bit(LastDev, &rdev->flags); |
972 | } | |
973 | } else | |
974 | clear_bit(LastDev, &rdev->flags); | |
7bfa19f2 | 975 | |
a9701a30 N |
976 | if (atomic_dec_and_test(&mddev->pending_writes)) |
977 | wake_up(&mddev->sb_wait); | |
ed3b98c7 | 978 | rdev_dec_pending(rdev, mddev); |
f8b58edf | 979 | bio_put(bio); |
7bfa19f2 N |
980 | } |
981 | ||
fd01b88c | 982 | void md_super_write(struct mddev *mddev, struct md_rdev *rdev, |
7bfa19f2 N |
983 | sector_t sector, int size, struct page *page) |
984 | { | |
985 | /* write first size bytes of page to sector of rdev | |
986 | * Increment mddev->pending_writes before returning | |
987 | * and decrement it on completion, waking up sb_wait | |
988 | * if zero is reached. | |
989 | * If an error occurred, call md_error | |
990 | */ | |
46533ff7 N |
991 | struct bio *bio; |
992 | int ff = 0; | |
993 | ||
4b6c1060 HM |
994 | if (!page) |
995 | return; | |
996 | ||
46533ff7 N |
997 | if (test_bit(Faulty, &rdev->flags)) |
998 | return; | |
999 | ||
6a596569 | 1000 | bio = bio_alloc_bioset(GFP_NOIO, 1, &mddev->sync_set); |
7bfa19f2 | 1001 | |
ed3b98c7 SL |
1002 | atomic_inc(&rdev->nr_pending); |
1003 | ||
74d46992 | 1004 | bio_set_dev(bio, rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev); |
4f024f37 | 1005 | bio->bi_iter.bi_sector = sector; |
7bfa19f2 N |
1006 | bio_add_page(bio, page, size, 0); |
1007 | bio->bi_private = rdev; | |
1008 | bio->bi_end_io = super_written; | |
46533ff7 N |
1009 | |
1010 | if (test_bit(MD_FAILFAST_SUPPORTED, &mddev->flags) && | |
1011 | test_bit(FailFast, &rdev->flags) && | |
1012 | !test_bit(LastDev, &rdev->flags)) | |
1013 | ff = MD_FAILFAST; | |
5a8948f8 | 1014 | bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH | REQ_FUA | ff; |
a9701a30 | 1015 | |
7bfa19f2 | 1016 | atomic_inc(&mddev->pending_writes); |
4e49ea4a | 1017 | submit_bio(bio); |
a9701a30 N |
1018 | } |
1019 | ||
46533ff7 | 1020 | int md_super_wait(struct mddev *mddev) |
a9701a30 | 1021 | { |
e9c7469b | 1022 | /* wait for all superblock writes that were scheduled to complete */ |
1967cd56 | 1023 | wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0); |
2953079c | 1024 | if (test_and_clear_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags)) |
46533ff7 N |
1025 | return -EAGAIN; |
1026 | return 0; | |
7bfa19f2 N |
1027 | } |
1028 | ||
3cb03002 | 1029 | int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, |
796a5cf0 | 1030 | struct page *page, int op, int op_flags, bool metadata_op) |
1da177e4 | 1031 | { |
32637385 CH |
1032 | struct bio bio; |
1033 | struct bio_vec bvec; | |
1034 | ||
1035 | bio_init(&bio, &bvec, 1); | |
1da177e4 | 1036 | |
74d46992 | 1037 | if (metadata_op && rdev->meta_bdev) |
32637385 | 1038 | bio_set_dev(&bio, rdev->meta_bdev); |
74d46992 | 1039 | else |
32637385 CH |
1040 | bio_set_dev(&bio, rdev->bdev); |
1041 | bio.bi_opf = op | op_flags; | |
ccebd4c4 | 1042 | if (metadata_op) |
32637385 | 1043 | bio.bi_iter.bi_sector = sector + rdev->sb_start; |
1fdd6fc9 N |
1044 | else if (rdev->mddev->reshape_position != MaxSector && |
1045 | (rdev->mddev->reshape_backwards == | |
1046 | (sector >= rdev->mddev->reshape_position))) | |
32637385 | 1047 | bio.bi_iter.bi_sector = sector + rdev->new_data_offset; |
ccebd4c4 | 1048 | else |
32637385 CH |
1049 | bio.bi_iter.bi_sector = sector + rdev->data_offset; |
1050 | bio_add_page(&bio, page, size, 0); | |
4e49ea4a | 1051 | |
32637385 | 1052 | submit_bio_wait(&bio); |
1da177e4 | 1053 | |
32637385 | 1054 | return !bio.bi_status; |
1da177e4 | 1055 | } |
a8745db2 | 1056 | EXPORT_SYMBOL_GPL(sync_page_io); |
1da177e4 | 1057 | |
f72ffdd6 | 1058 | static int read_disk_sb(struct md_rdev *rdev, int size) |
1da177e4 LT |
1059 | { |
1060 | char b[BDEVNAME_SIZE]; | |
403df478 | 1061 | |
1da177e4 LT |
1062 | if (rdev->sb_loaded) |
1063 | return 0; | |
1064 | ||
796a5cf0 | 1065 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, REQ_OP_READ, 0, true)) |
1da177e4 LT |
1066 | goto fail; |
1067 | rdev->sb_loaded = 1; | |
1068 | return 0; | |
1069 | ||
1070 | fail: | |
9d48739e N |
1071 | pr_err("md: disabled device %s, could not read superblock.\n", |
1072 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
1073 | return -EINVAL; |
1074 | } | |
1075 | ||
e6fd2093 | 1076 | static int md_uuid_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 | 1077 | { |
f72ffdd6 | 1078 | return sb1->set_uuid0 == sb2->set_uuid0 && |
05710466 AN |
1079 | sb1->set_uuid1 == sb2->set_uuid1 && |
1080 | sb1->set_uuid2 == sb2->set_uuid2 && | |
1081 | sb1->set_uuid3 == sb2->set_uuid3; | |
1da177e4 LT |
1082 | } |
1083 | ||
e6fd2093 | 1084 | static int md_sb_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 LT |
1085 | { |
1086 | int ret; | |
1087 | mdp_super_t *tmp1, *tmp2; | |
1088 | ||
1089 | tmp1 = kmalloc(sizeof(*tmp1),GFP_KERNEL); | |
1090 | tmp2 = kmalloc(sizeof(*tmp2),GFP_KERNEL); | |
1091 | ||
1092 | if (!tmp1 || !tmp2) { | |
1093 | ret = 0; | |
1da177e4 LT |
1094 | goto abort; |
1095 | } | |
1096 | ||
1097 | *tmp1 = *sb1; | |
1098 | *tmp2 = *sb2; | |
1099 | ||
1100 | /* | |
1101 | * nr_disks is not constant | |
1102 | */ | |
1103 | tmp1->nr_disks = 0; | |
1104 | tmp2->nr_disks = 0; | |
1105 | ||
ce0c8e05 | 1106 | ret = (memcmp(tmp1, tmp2, MD_SB_GENERIC_CONSTANT_WORDS * 4) == 0); |
1da177e4 | 1107 | abort: |
990a8baf JJ |
1108 | kfree(tmp1); |
1109 | kfree(tmp2); | |
1da177e4 LT |
1110 | return ret; |
1111 | } | |
1112 | ||
4d167f09 N |
1113 | static u32 md_csum_fold(u32 csum) |
1114 | { | |
1115 | csum = (csum & 0xffff) + (csum >> 16); | |
1116 | return (csum & 0xffff) + (csum >> 16); | |
1117 | } | |
1118 | ||
f72ffdd6 | 1119 | static unsigned int calc_sb_csum(mdp_super_t *sb) |
1da177e4 | 1120 | { |
4d167f09 N |
1121 | u64 newcsum = 0; |
1122 | u32 *sb32 = (u32*)sb; | |
1123 | int i; | |
1da177e4 LT |
1124 | unsigned int disk_csum, csum; |
1125 | ||
1126 | disk_csum = sb->sb_csum; | |
1127 | sb->sb_csum = 0; | |
4d167f09 N |
1128 | |
1129 | for (i = 0; i < MD_SB_BYTES/4 ; i++) | |
1130 | newcsum += sb32[i]; | |
1131 | csum = (newcsum & 0xffffffff) + (newcsum>>32); | |
1132 | ||
4d167f09 N |
1133 | #ifdef CONFIG_ALPHA |
1134 | /* This used to use csum_partial, which was wrong for several | |
1135 | * reasons including that different results are returned on | |
1136 | * different architectures. It isn't critical that we get exactly | |
1137 | * the same return value as before (we always csum_fold before | |
1138 | * testing, and that removes any differences). However as we | |
1139 | * know that csum_partial always returned a 16bit value on | |
1140 | * alphas, do a fold to maximise conformity to previous behaviour. | |
1141 | */ | |
1142 | sb->sb_csum = md_csum_fold(disk_csum); | |
1143 | #else | |
1da177e4 | 1144 | sb->sb_csum = disk_csum; |
4d167f09 | 1145 | #endif |
1da177e4 LT |
1146 | return csum; |
1147 | } | |
1148 | ||
1da177e4 LT |
1149 | /* |
1150 | * Handle superblock details. | |
1151 | * We want to be able to handle multiple superblock formats | |
1152 | * so we have a common interface to them all, and an array of | |
1153 | * different handlers. | |
1154 | * We rely on user-space to write the initial superblock, and support | |
1155 | * reading and updating of superblocks. | |
1156 | * Interface methods are: | |
3cb03002 | 1157 | * int load_super(struct md_rdev *dev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1158 | * loads and validates a superblock on dev. |
1159 | * if refdev != NULL, compare superblocks on both devices | |
1160 | * Return: | |
1161 | * 0 - dev has a superblock that is compatible with refdev | |
1162 | * 1 - dev has a superblock that is compatible and newer than refdev | |
1163 | * so dev should be used as the refdev in future | |
1164 | * -EINVAL superblock incompatible or invalid | |
1165 | * -othererror e.g. -EIO | |
1166 | * | |
fd01b88c | 1167 | * int validate_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1168 | * Verify that dev is acceptable into mddev. |
1169 | * The first time, mddev->raid_disks will be 0, and data from | |
1170 | * dev should be merged in. Subsequent calls check that dev | |
1171 | * is new enough. Return 0 or -EINVAL | |
1172 | * | |
fd01b88c | 1173 | * void sync_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1174 | * Update the superblock for rdev with data in mddev |
1175 | * This does not write to disc. | |
1176 | * | |
1177 | */ | |
1178 | ||
1179 | struct super_type { | |
0cd17fec CW |
1180 | char *name; |
1181 | struct module *owner; | |
c6563a8c N |
1182 | int (*load_super)(struct md_rdev *rdev, |
1183 | struct md_rdev *refdev, | |
0cd17fec | 1184 | int minor_version); |
c6563a8c N |
1185 | int (*validate_super)(struct mddev *mddev, |
1186 | struct md_rdev *rdev); | |
1187 | void (*sync_super)(struct mddev *mddev, | |
1188 | struct md_rdev *rdev); | |
3cb03002 | 1189 | unsigned long long (*rdev_size_change)(struct md_rdev *rdev, |
15f4a5fd | 1190 | sector_t num_sectors); |
c6563a8c N |
1191 | int (*allow_new_offset)(struct md_rdev *rdev, |
1192 | unsigned long long new_offset); | |
1da177e4 LT |
1193 | }; |
1194 | ||
0894cc30 AN |
1195 | /* |
1196 | * Check that the given mddev has no bitmap. | |
1197 | * | |
1198 | * This function is called from the run method of all personalities that do not | |
1199 | * support bitmaps. It prints an error message and returns non-zero if mddev | |
1200 | * has a bitmap. Otherwise, it returns 0. | |
1201 | * | |
1202 | */ | |
fd01b88c | 1203 | int md_check_no_bitmap(struct mddev *mddev) |
0894cc30 | 1204 | { |
c3d9714e | 1205 | if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset) |
0894cc30 | 1206 | return 0; |
9d48739e | 1207 | pr_warn("%s: bitmaps are not supported for %s\n", |
0894cc30 AN |
1208 | mdname(mddev), mddev->pers->name); |
1209 | return 1; | |
1210 | } | |
1211 | EXPORT_SYMBOL(md_check_no_bitmap); | |
1212 | ||
1da177e4 | 1213 | /* |
f72ffdd6 | 1214 | * load_super for 0.90.0 |
1da177e4 | 1215 | */ |
3cb03002 | 1216 | static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1217 | { |
1218 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
1219 | mdp_super_t *sb; | |
1220 | int ret; | |
228fc7d7 | 1221 | bool spare_disk = true; |
1da177e4 LT |
1222 | |
1223 | /* | |
0f420358 | 1224 | * Calculate the position of the superblock (512byte sectors), |
1da177e4 LT |
1225 | * it's at the end of the disk. |
1226 | * | |
1227 | * It also happens to be a multiple of 4Kb. | |
1228 | */ | |
57b2caa3 | 1229 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 1230 | |
0002b271 | 1231 | ret = read_disk_sb(rdev, MD_SB_BYTES); |
9d48739e N |
1232 | if (ret) |
1233 | return ret; | |
1da177e4 LT |
1234 | |
1235 | ret = -EINVAL; | |
1236 | ||
1237 | bdevname(rdev->bdev, b); | |
65a06f06 | 1238 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1239 | |
1240 | if (sb->md_magic != MD_SB_MAGIC) { | |
9d48739e | 1241 | pr_warn("md: invalid raid superblock magic on %s\n", b); |
1da177e4 LT |
1242 | goto abort; |
1243 | } | |
1244 | ||
1245 | if (sb->major_version != 0 || | |
f6705578 N |
1246 | sb->minor_version < 90 || |
1247 | sb->minor_version > 91) { | |
9d48739e N |
1248 | pr_warn("Bad version number %d.%d on %s\n", |
1249 | sb->major_version, sb->minor_version, b); | |
1da177e4 LT |
1250 | goto abort; |
1251 | } | |
1252 | ||
1253 | if (sb->raid_disks <= 0) | |
1254 | goto abort; | |
1255 | ||
4d167f09 | 1256 | if (md_csum_fold(calc_sb_csum(sb)) != md_csum_fold(sb->sb_csum)) { |
9d48739e | 1257 | pr_warn("md: invalid superblock checksum on %s\n", b); |
1da177e4 LT |
1258 | goto abort; |
1259 | } | |
1260 | ||
1261 | rdev->preferred_minor = sb->md_minor; | |
1262 | rdev->data_offset = 0; | |
c6563a8c | 1263 | rdev->new_data_offset = 0; |
0002b271 | 1264 | rdev->sb_size = MD_SB_BYTES; |
9f2f3830 | 1265 | rdev->badblocks.shift = -1; |
1da177e4 LT |
1266 | |
1267 | if (sb->level == LEVEL_MULTIPATH) | |
1268 | rdev->desc_nr = -1; | |
1269 | else | |
1270 | rdev->desc_nr = sb->this_disk.number; | |
1271 | ||
228fc7d7 YY |
1272 | /* not spare disk, or LEVEL_MULTIPATH */ |
1273 | if (sb->level == LEVEL_MULTIPATH || | |
1274 | (rdev->desc_nr >= 0 && | |
3b7436cc | 1275 | rdev->desc_nr < MD_SB_DISKS && |
228fc7d7 YY |
1276 | sb->disks[rdev->desc_nr].state & |
1277 | ((1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE)))) | |
1278 | spare_disk = false; | |
1279 | ||
9a7b2b0f | 1280 | if (!refdev) { |
228fc7d7 | 1281 | if (!spare_disk) |
6a5cb53a YY |
1282 | ret = 1; |
1283 | else | |
1284 | ret = 0; | |
9a7b2b0f | 1285 | } else { |
1da177e4 | 1286 | __u64 ev1, ev2; |
65a06f06 | 1287 | mdp_super_t *refsb = page_address(refdev->sb_page); |
e6fd2093 | 1288 | if (!md_uuid_equal(refsb, sb)) { |
9d48739e | 1289 | pr_warn("md: %s has different UUID to %s\n", |
1da177e4 LT |
1290 | b, bdevname(refdev->bdev,b2)); |
1291 | goto abort; | |
1292 | } | |
e6fd2093 | 1293 | if (!md_sb_equal(refsb, sb)) { |
9d48739e N |
1294 | pr_warn("md: %s has same UUID but different superblock to %s\n", |
1295 | b, bdevname(refdev->bdev, b2)); | |
1da177e4 LT |
1296 | goto abort; |
1297 | } | |
1298 | ev1 = md_event(sb); | |
1299 | ev2 = md_event(refsb); | |
6a5cb53a | 1300 | |
228fc7d7 | 1301 | if (!spare_disk && ev1 > ev2) |
1da177e4 | 1302 | ret = 1; |
f72ffdd6 | 1303 | else |
1da177e4 LT |
1304 | ret = 0; |
1305 | } | |
8190e754 | 1306 | rdev->sectors = rdev->sb_start; |
667a5313 N |
1307 | /* Limit to 4TB as metadata cannot record more than that. |
1308 | * (not needed for Linear and RAID0 as metadata doesn't | |
1309 | * record this size) | |
1310 | */ | |
72deb455 | 1311 | if ((u64)rdev->sectors >= (2ULL << 32) && sb->level >= 1) |
3312c951 | 1312 | rdev->sectors = (sector_t)(2ULL << 32) - 2; |
1da177e4 | 1313 | |
27a7b260 | 1314 | if (rdev->sectors < ((sector_t)sb->size) * 2 && sb->level >= 1) |
2bf071bf N |
1315 | /* "this cannot possibly happen" ... */ |
1316 | ret = -EINVAL; | |
1317 | ||
1da177e4 LT |
1318 | abort: |
1319 | return ret; | |
1320 | } | |
1321 | ||
1322 | /* | |
1323 | * validate_super for 0.90.0 | |
1324 | */ | |
fd01b88c | 1325 | static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1326 | { |
1327 | mdp_disk_t *desc; | |
65a06f06 | 1328 | mdp_super_t *sb = page_address(rdev->sb_page); |
07d84d10 | 1329 | __u64 ev1 = md_event(sb); |
1da177e4 | 1330 | |
41158c7e | 1331 | rdev->raid_disk = -1; |
c5d79adb N |
1332 | clear_bit(Faulty, &rdev->flags); |
1333 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1334 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1335 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1336 | |
1da177e4 LT |
1337 | if (mddev->raid_disks == 0) { |
1338 | mddev->major_version = 0; | |
1339 | mddev->minor_version = sb->minor_version; | |
1340 | mddev->patch_version = sb->patch_version; | |
e691063a | 1341 | mddev->external = 0; |
9d8f0363 | 1342 | mddev->chunk_sectors = sb->chunk_size >> 9; |
1da177e4 LT |
1343 | mddev->ctime = sb->ctime; |
1344 | mddev->utime = sb->utime; | |
1345 | mddev->level = sb->level; | |
d9d166c2 | 1346 | mddev->clevel[0] = 0; |
1da177e4 LT |
1347 | mddev->layout = sb->layout; |
1348 | mddev->raid_disks = sb->raid_disks; | |
27a7b260 | 1349 | mddev->dev_sectors = ((sector_t)sb->size) * 2; |
07d84d10 | 1350 | mddev->events = ev1; |
c3d9714e | 1351 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1352 | mddev->bitmap_info.space = 0; |
1353 | /* bitmap can use 60 K after the 4K superblocks */ | |
c3d9714e | 1354 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 1355 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
2c810cdd | 1356 | mddev->reshape_backwards = 0; |
1da177e4 | 1357 | |
f6705578 N |
1358 | if (mddev->minor_version >= 91) { |
1359 | mddev->reshape_position = sb->reshape_position; | |
1360 | mddev->delta_disks = sb->delta_disks; | |
1361 | mddev->new_level = sb->new_level; | |
1362 | mddev->new_layout = sb->new_layout; | |
664e7c41 | 1363 | mddev->new_chunk_sectors = sb->new_chunk >> 9; |
2c810cdd N |
1364 | if (mddev->delta_disks < 0) |
1365 | mddev->reshape_backwards = 1; | |
f6705578 N |
1366 | } else { |
1367 | mddev->reshape_position = MaxSector; | |
1368 | mddev->delta_disks = 0; | |
1369 | mddev->new_level = mddev->level; | |
1370 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1371 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 | 1372 | } |
33f2c35a N |
1373 | if (mddev->level == 0) |
1374 | mddev->layout = -1; | |
f6705578 | 1375 | |
1da177e4 LT |
1376 | if (sb->state & (1<<MD_SB_CLEAN)) |
1377 | mddev->recovery_cp = MaxSector; | |
1378 | else { | |
f72ffdd6 | 1379 | if (sb->events_hi == sb->cp_events_hi && |
1da177e4 LT |
1380 | sb->events_lo == sb->cp_events_lo) { |
1381 | mddev->recovery_cp = sb->recovery_cp; | |
1382 | } else | |
1383 | mddev->recovery_cp = 0; | |
1384 | } | |
1385 | ||
1386 | memcpy(mddev->uuid+0, &sb->set_uuid0, 4); | |
1387 | memcpy(mddev->uuid+4, &sb->set_uuid1, 4); | |
1388 | memcpy(mddev->uuid+8, &sb->set_uuid2, 4); | |
1389 | memcpy(mddev->uuid+12,&sb->set_uuid3, 4); | |
1390 | ||
1391 | mddev->max_disks = MD_SB_DISKS; | |
a654b9d8 N |
1392 | |
1393 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT) && | |
6409bb05 | 1394 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1395 | mddev->bitmap_info.offset = |
1396 | mddev->bitmap_info.default_offset; | |
6409bb05 | 1397 | mddev->bitmap_info.space = |
c9ad020f | 1398 | mddev->bitmap_info.default_space; |
6409bb05 | 1399 | } |
a654b9d8 | 1400 | |
41158c7e | 1401 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1402 | /* Insist on good event counter while assembling, except |
1403 | * for spares (which don't need an event count) */ | |
1da177e4 | 1404 | ++ev1; |
be6800a7 N |
1405 | if (sb->disks[rdev->desc_nr].state & ( |
1406 | (1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE))) | |
f72ffdd6 | 1407 | if (ev1 < mddev->events) |
be6800a7 | 1408 | return -EINVAL; |
41158c7e N |
1409 | } else if (mddev->bitmap) { |
1410 | /* if adding to array with a bitmap, then we can accept an | |
1411 | * older device ... but not too old. | |
1412 | */ | |
41158c7e N |
1413 | if (ev1 < mddev->bitmap->events_cleared) |
1414 | return 0; | |
8313b8e5 N |
1415 | if (ev1 < mddev->events) |
1416 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1417 | } else { |
1418 | if (ev1 < mddev->events) | |
1419 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1420 | return 0; | |
1421 | } | |
41158c7e | 1422 | |
1da177e4 | 1423 | if (mddev->level != LEVEL_MULTIPATH) { |
1da177e4 LT |
1424 | desc = sb->disks + rdev->desc_nr; |
1425 | ||
1426 | if (desc->state & (1<<MD_DISK_FAULTY)) | |
b2d444d7 | 1427 | set_bit(Faulty, &rdev->flags); |
7c7546cc N |
1428 | else if (desc->state & (1<<MD_DISK_SYNC) /* && |
1429 | desc->raid_disk < mddev->raid_disks */) { | |
b2d444d7 | 1430 | set_bit(In_sync, &rdev->flags); |
1da177e4 | 1431 | rdev->raid_disk = desc->raid_disk; |
f466722c | 1432 | rdev->saved_raid_disk = desc->raid_disk; |
0261cd9f N |
1433 | } else if (desc->state & (1<<MD_DISK_ACTIVE)) { |
1434 | /* active but not in sync implies recovery up to | |
1435 | * reshape position. We don't know exactly where | |
1436 | * that is, so set to zero for now */ | |
1437 | if (mddev->minor_version >= 91) { | |
1438 | rdev->recovery_offset = 0; | |
1439 | rdev->raid_disk = desc->raid_disk; | |
1440 | } | |
1da177e4 | 1441 | } |
8ddf9efe N |
1442 | if (desc->state & (1<<MD_DISK_WRITEMOSTLY)) |
1443 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1444 | if (desc->state & (1<<MD_DISK_FAILFAST)) |
1445 | set_bit(FailFast, &rdev->flags); | |
41158c7e | 1446 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1447 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1448 | return 0; |
1449 | } | |
1450 | ||
1451 | /* | |
1452 | * sync_super for 0.90.0 | |
1453 | */ | |
fd01b88c | 1454 | static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1455 | { |
1456 | mdp_super_t *sb; | |
3cb03002 | 1457 | struct md_rdev *rdev2; |
1da177e4 | 1458 | int next_spare = mddev->raid_disks; |
19133a42 | 1459 | |
1da177e4 LT |
1460 | /* make rdev->sb match mddev data.. |
1461 | * | |
1462 | * 1/ zero out disks | |
1463 | * 2/ Add info for each disk, keeping track of highest desc_nr (next_spare); | |
1464 | * 3/ any empty disks < next_spare become removed | |
1465 | * | |
1466 | * disks[0] gets initialised to REMOVED because | |
1467 | * we cannot be sure from other fields if it has | |
1468 | * been initialised or not. | |
1469 | */ | |
1470 | int i; | |
1471 | int active=0, working=0,failed=0,spare=0,nr_disks=0; | |
1472 | ||
61181565 N |
1473 | rdev->sb_size = MD_SB_BYTES; |
1474 | ||
65a06f06 | 1475 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1476 | |
1477 | memset(sb, 0, sizeof(*sb)); | |
1478 | ||
1479 | sb->md_magic = MD_SB_MAGIC; | |
1480 | sb->major_version = mddev->major_version; | |
1da177e4 LT |
1481 | sb->patch_version = mddev->patch_version; |
1482 | sb->gvalid_words = 0; /* ignored */ | |
1483 | memcpy(&sb->set_uuid0, mddev->uuid+0, 4); | |
1484 | memcpy(&sb->set_uuid1, mddev->uuid+4, 4); | |
1485 | memcpy(&sb->set_uuid2, mddev->uuid+8, 4); | |
1486 | memcpy(&sb->set_uuid3, mddev->uuid+12,4); | |
1487 | ||
9ebc6ef1 | 1488 | sb->ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 1489 | sb->level = mddev->level; |
58c0fed4 | 1490 | sb->size = mddev->dev_sectors / 2; |
1da177e4 LT |
1491 | sb->raid_disks = mddev->raid_disks; |
1492 | sb->md_minor = mddev->md_minor; | |
e691063a | 1493 | sb->not_persistent = 0; |
9ebc6ef1 | 1494 | sb->utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
1495 | sb->state = 0; |
1496 | sb->events_hi = (mddev->events>>32); | |
1497 | sb->events_lo = (u32)mddev->events; | |
1498 | ||
f6705578 N |
1499 | if (mddev->reshape_position == MaxSector) |
1500 | sb->minor_version = 90; | |
1501 | else { | |
1502 | sb->minor_version = 91; | |
1503 | sb->reshape_position = mddev->reshape_position; | |
1504 | sb->new_level = mddev->new_level; | |
1505 | sb->delta_disks = mddev->delta_disks; | |
1506 | sb->new_layout = mddev->new_layout; | |
664e7c41 | 1507 | sb->new_chunk = mddev->new_chunk_sectors << 9; |
f6705578 N |
1508 | } |
1509 | mddev->minor_version = sb->minor_version; | |
1da177e4 LT |
1510 | if (mddev->in_sync) |
1511 | { | |
1512 | sb->recovery_cp = mddev->recovery_cp; | |
1513 | sb->cp_events_hi = (mddev->events>>32); | |
1514 | sb->cp_events_lo = (u32)mddev->events; | |
1515 | if (mddev->recovery_cp == MaxSector) | |
1516 | sb->state = (1<< MD_SB_CLEAN); | |
1517 | } else | |
1518 | sb->recovery_cp = 0; | |
1519 | ||
1520 | sb->layout = mddev->layout; | |
9d8f0363 | 1521 | sb->chunk_size = mddev->chunk_sectors << 9; |
1da177e4 | 1522 | |
c3d9714e | 1523 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) |
a654b9d8 N |
1524 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); |
1525 | ||
1da177e4 | 1526 | sb->disks[0].state = (1<<MD_DISK_REMOVED); |
dafb20fa | 1527 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1528 | mdp_disk_t *d; |
86e6ffdd | 1529 | int desc_nr; |
0261cd9f N |
1530 | int is_active = test_bit(In_sync, &rdev2->flags); |
1531 | ||
1532 | if (rdev2->raid_disk >= 0 && | |
1533 | sb->minor_version >= 91) | |
1534 | /* we have nowhere to store the recovery_offset, | |
1535 | * but if it is not below the reshape_position, | |
1536 | * we can piggy-back on that. | |
1537 | */ | |
1538 | is_active = 1; | |
1539 | if (rdev2->raid_disk < 0 || | |
1540 | test_bit(Faulty, &rdev2->flags)) | |
1541 | is_active = 0; | |
1542 | if (is_active) | |
86e6ffdd | 1543 | desc_nr = rdev2->raid_disk; |
1da177e4 | 1544 | else |
86e6ffdd | 1545 | desc_nr = next_spare++; |
19133a42 | 1546 | rdev2->desc_nr = desc_nr; |
1da177e4 LT |
1547 | d = &sb->disks[rdev2->desc_nr]; |
1548 | nr_disks++; | |
1549 | d->number = rdev2->desc_nr; | |
1550 | d->major = MAJOR(rdev2->bdev->bd_dev); | |
1551 | d->minor = MINOR(rdev2->bdev->bd_dev); | |
0261cd9f | 1552 | if (is_active) |
1da177e4 LT |
1553 | d->raid_disk = rdev2->raid_disk; |
1554 | else | |
1555 | d->raid_disk = rdev2->desc_nr; /* compatibility */ | |
1be7892f | 1556 | if (test_bit(Faulty, &rdev2->flags)) |
1da177e4 | 1557 | d->state = (1<<MD_DISK_FAULTY); |
0261cd9f | 1558 | else if (is_active) { |
1da177e4 | 1559 | d->state = (1<<MD_DISK_ACTIVE); |
0261cd9f N |
1560 | if (test_bit(In_sync, &rdev2->flags)) |
1561 | d->state |= (1<<MD_DISK_SYNC); | |
1da177e4 LT |
1562 | active++; |
1563 | working++; | |
1564 | } else { | |
1565 | d->state = 0; | |
1566 | spare++; | |
1567 | working++; | |
1568 | } | |
8ddf9efe N |
1569 | if (test_bit(WriteMostly, &rdev2->flags)) |
1570 | d->state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
1571 | if (test_bit(FailFast, &rdev2->flags)) |
1572 | d->state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 | 1573 | } |
1da177e4 LT |
1574 | /* now set the "removed" and "faulty" bits on any missing devices */ |
1575 | for (i=0 ; i < mddev->raid_disks ; i++) { | |
1576 | mdp_disk_t *d = &sb->disks[i]; | |
1577 | if (d->state == 0 && d->number == 0) { | |
1578 | d->number = i; | |
1579 | d->raid_disk = i; | |
1580 | d->state = (1<<MD_DISK_REMOVED); | |
1581 | d->state |= (1<<MD_DISK_FAULTY); | |
1582 | failed++; | |
1583 | } | |
1584 | } | |
1585 | sb->nr_disks = nr_disks; | |
1586 | sb->active_disks = active; | |
1587 | sb->working_disks = working; | |
1588 | sb->failed_disks = failed; | |
1589 | sb->spare_disks = spare; | |
1590 | ||
1591 | sb->this_disk = sb->disks[rdev->desc_nr]; | |
1592 | sb->sb_csum = calc_sb_csum(sb); | |
1593 | } | |
1594 | ||
0cd17fec CW |
1595 | /* |
1596 | * rdev_size_change for 0.90.0 | |
1597 | */ | |
1598 | static unsigned long long | |
3cb03002 | 1599 | super_90_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec | 1600 | { |
58c0fed4 | 1601 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1602 | return 0; /* component must fit device */ |
c3d9714e | 1603 | if (rdev->mddev->bitmap_info.offset) |
0cd17fec | 1604 | return 0; /* can't move bitmap */ |
57b2caa3 | 1605 | rdev->sb_start = calc_dev_sboffset(rdev); |
15f4a5fd AN |
1606 | if (!num_sectors || num_sectors > rdev->sb_start) |
1607 | num_sectors = rdev->sb_start; | |
27a7b260 N |
1608 | /* Limit to 4TB as metadata cannot record more than that. |
1609 | * 4TB == 2^32 KB, or 2*2^32 sectors. | |
1610 | */ | |
72deb455 | 1611 | if ((u64)num_sectors >= (2ULL << 32) && rdev->mddev->level >= 1) |
3312c951 | 1612 | num_sectors = (sector_t)(2ULL << 32) - 2; |
46533ff7 N |
1613 | do { |
1614 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
0cd17fec | 1615 | rdev->sb_page); |
46533ff7 | 1616 | } while (md_super_wait(rdev->mddev) < 0); |
c26a44ed | 1617 | return num_sectors; |
0cd17fec CW |
1618 | } |
1619 | ||
c6563a8c N |
1620 | static int |
1621 | super_90_allow_new_offset(struct md_rdev *rdev, unsigned long long new_offset) | |
1622 | { | |
1623 | /* non-zero offset changes not possible with v0.90 */ | |
1624 | return new_offset == 0; | |
1625 | } | |
0cd17fec | 1626 | |
1da177e4 LT |
1627 | /* |
1628 | * version 1 superblock | |
1629 | */ | |
1630 | ||
f72ffdd6 | 1631 | static __le32 calc_sb_1_csum(struct mdp_superblock_1 *sb) |
1da177e4 | 1632 | { |
1c05b4bc N |
1633 | __le32 disk_csum; |
1634 | u32 csum; | |
1da177e4 LT |
1635 | unsigned long long newcsum; |
1636 | int size = 256 + le32_to_cpu(sb->max_dev)*2; | |
1c05b4bc | 1637 | __le32 *isuper = (__le32*)sb; |
1da177e4 LT |
1638 | |
1639 | disk_csum = sb->sb_csum; | |
1640 | sb->sb_csum = 0; | |
1641 | newcsum = 0; | |
1f3c9907 | 1642 | for (; size >= 4; size -= 4) |
1da177e4 LT |
1643 | newcsum += le32_to_cpu(*isuper++); |
1644 | ||
1645 | if (size == 2) | |
1c05b4bc | 1646 | newcsum += le16_to_cpu(*(__le16*) isuper); |
1da177e4 LT |
1647 | |
1648 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
1649 | sb->sb_csum = disk_csum; | |
1650 | return cpu_to_le32(csum); | |
1651 | } | |
1652 | ||
3cb03002 | 1653 | static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1654 | { |
1655 | struct mdp_superblock_1 *sb; | |
1656 | int ret; | |
0f420358 | 1657 | sector_t sb_start; |
c6563a8c | 1658 | sector_t sectors; |
1da177e4 | 1659 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; |
0002b271 | 1660 | int bmask; |
228fc7d7 | 1661 | bool spare_disk = true; |
1da177e4 LT |
1662 | |
1663 | /* | |
0f420358 | 1664 | * Calculate the position of the superblock in 512byte sectors. |
1da177e4 LT |
1665 | * It is always aligned to a 4K boundary and |
1666 | * depeding on minor_version, it can be: | |
1667 | * 0: At least 8K, but less than 12K, from end of device | |
1668 | * 1: At start of device | |
1669 | * 2: 4K from start of device. | |
1670 | */ | |
1671 | switch(minor_version) { | |
1672 | case 0: | |
77304d2a | 1673 | sb_start = i_size_read(rdev->bdev->bd_inode) >> 9; |
0f420358 AN |
1674 | sb_start -= 8*2; |
1675 | sb_start &= ~(sector_t)(4*2-1); | |
1da177e4 LT |
1676 | break; |
1677 | case 1: | |
0f420358 | 1678 | sb_start = 0; |
1da177e4 LT |
1679 | break; |
1680 | case 2: | |
0f420358 | 1681 | sb_start = 8; |
1da177e4 LT |
1682 | break; |
1683 | default: | |
1684 | return -EINVAL; | |
1685 | } | |
0f420358 | 1686 | rdev->sb_start = sb_start; |
1da177e4 | 1687 | |
0002b271 N |
1688 | /* superblock is rarely larger than 1K, but it can be larger, |
1689 | * and it is safe to read 4k, so we do that | |
1690 | */ | |
1691 | ret = read_disk_sb(rdev, 4096); | |
1da177e4 LT |
1692 | if (ret) return ret; |
1693 | ||
65a06f06 | 1694 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1695 | |
1696 | if (sb->magic != cpu_to_le32(MD_SB_MAGIC) || | |
1697 | sb->major_version != cpu_to_le32(1) || | |
1698 | le32_to_cpu(sb->max_dev) > (4096-256)/2 || | |
0f420358 | 1699 | le64_to_cpu(sb->super_offset) != rdev->sb_start || |
71c0805c | 1700 | (le32_to_cpu(sb->feature_map) & ~MD_FEATURE_ALL) != 0) |
1da177e4 LT |
1701 | return -EINVAL; |
1702 | ||
1703 | if (calc_sb_1_csum(sb) != sb->sb_csum) { | |
9d48739e | 1704 | pr_warn("md: invalid superblock checksum on %s\n", |
1da177e4 LT |
1705 | bdevname(rdev->bdev,b)); |
1706 | return -EINVAL; | |
1707 | } | |
1708 | if (le64_to_cpu(sb->data_size) < 10) { | |
9d48739e N |
1709 | pr_warn("md: data_size too small on %s\n", |
1710 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
1711 | return -EINVAL; |
1712 | } | |
c6563a8c N |
1713 | if (sb->pad0 || |
1714 | sb->pad3[0] || | |
1715 | memcmp(sb->pad3, sb->pad3+1, sizeof(sb->pad3) - sizeof(sb->pad3[1]))) | |
1716 | /* Some padding is non-zero, might be a new feature */ | |
1717 | return -EINVAL; | |
e11e93fa | 1718 | |
1da177e4 LT |
1719 | rdev->preferred_minor = 0xffff; |
1720 | rdev->data_offset = le64_to_cpu(sb->data_offset); | |
c6563a8c N |
1721 | rdev->new_data_offset = rdev->data_offset; |
1722 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE) && | |
1723 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) | |
1724 | rdev->new_data_offset += (s32)le32_to_cpu(sb->new_offset); | |
4dbcdc75 | 1725 | atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read)); |
1da177e4 | 1726 | |
0002b271 | 1727 | rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256; |
e1defc4f | 1728 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; |
0002b271 | 1729 | if (rdev->sb_size & bmask) |
a1801f85 N |
1730 | rdev->sb_size = (rdev->sb_size | bmask) + 1; |
1731 | ||
1732 | if (minor_version | |
0f420358 | 1733 | && rdev->data_offset < sb_start + (rdev->sb_size/512)) |
a1801f85 | 1734 | return -EINVAL; |
c6563a8c N |
1735 | if (minor_version |
1736 | && rdev->new_data_offset < sb_start + (rdev->sb_size/512)) | |
1737 | return -EINVAL; | |
0002b271 | 1738 | |
31b65a0d N |
1739 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH)) |
1740 | rdev->desc_nr = -1; | |
1741 | else | |
1742 | rdev->desc_nr = le32_to_cpu(sb->dev_number); | |
1743 | ||
2699b672 N |
1744 | if (!rdev->bb_page) { |
1745 | rdev->bb_page = alloc_page(GFP_KERNEL); | |
1746 | if (!rdev->bb_page) | |
1747 | return -ENOMEM; | |
1748 | } | |
1749 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BAD_BLOCKS) && | |
1750 | rdev->badblocks.count == 0) { | |
1751 | /* need to load the bad block list. | |
1752 | * Currently we limit it to one page. | |
1753 | */ | |
1754 | s32 offset; | |
1755 | sector_t bb_sector; | |
00485d09 | 1756 | __le64 *bbp; |
2699b672 N |
1757 | int i; |
1758 | int sectors = le16_to_cpu(sb->bblog_size); | |
1759 | if (sectors > (PAGE_SIZE / 512)) | |
1760 | return -EINVAL; | |
1761 | offset = le32_to_cpu(sb->bblog_offset); | |
1762 | if (offset == 0) | |
1763 | return -EINVAL; | |
1764 | bb_sector = (long long)offset; | |
1765 | if (!sync_page_io(rdev, bb_sector, sectors << 9, | |
796a5cf0 | 1766 | rdev->bb_page, REQ_OP_READ, 0, true)) |
2699b672 | 1767 | return -EIO; |
00485d09 | 1768 | bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
1769 | rdev->badblocks.shift = sb->bblog_shift; |
1770 | for (i = 0 ; i < (sectors << (9-3)) ; i++, bbp++) { | |
1771 | u64 bb = le64_to_cpu(*bbp); | |
1772 | int count = bb & (0x3ff); | |
1773 | u64 sector = bb >> 10; | |
1774 | sector <<= sb->bblog_shift; | |
1775 | count <<= sb->bblog_shift; | |
1776 | if (bb + 1 == 0) | |
1777 | break; | |
fc974ee2 | 1778 | if (badblocks_set(&rdev->badblocks, sector, count, 1)) |
2699b672 N |
1779 | return -EINVAL; |
1780 | } | |
486adf72 N |
1781 | } else if (sb->bblog_offset != 0) |
1782 | rdev->badblocks.shift = 0; | |
2699b672 | 1783 | |
ddc08823 PB |
1784 | if ((le32_to_cpu(sb->feature_map) & |
1785 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS))) { | |
ea0213e0 AP |
1786 | rdev->ppl.offset = (__s16)le16_to_cpu(sb->ppl.offset); |
1787 | rdev->ppl.size = le16_to_cpu(sb->ppl.size); | |
1788 | rdev->ppl.sector = rdev->sb_start + rdev->ppl.offset; | |
1789 | } | |
1790 | ||
33f2c35a N |
1791 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT) && |
1792 | sb->level != 0) | |
1793 | return -EINVAL; | |
1794 | ||
228fc7d7 YY |
1795 | /* not spare disk, or LEVEL_MULTIPATH */ |
1796 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH) || | |
1797 | (rdev->desc_nr >= 0 && | |
1798 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
1799 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || | |
1800 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL))) | |
1801 | spare_disk = false; | |
6a5cb53a | 1802 | |
9a7b2b0f | 1803 | if (!refdev) { |
228fc7d7 | 1804 | if (!spare_disk) |
6a5cb53a YY |
1805 | ret = 1; |
1806 | else | |
1807 | ret = 0; | |
9a7b2b0f | 1808 | } else { |
1da177e4 | 1809 | __u64 ev1, ev2; |
65a06f06 | 1810 | struct mdp_superblock_1 *refsb = page_address(refdev->sb_page); |
1da177e4 LT |
1811 | |
1812 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16) != 0 || | |
1813 | sb->level != refsb->level || | |
1814 | sb->layout != refsb->layout || | |
1815 | sb->chunksize != refsb->chunksize) { | |
9d48739e | 1816 | pr_warn("md: %s has strangely different superblock to %s\n", |
1da177e4 LT |
1817 | bdevname(rdev->bdev,b), |
1818 | bdevname(refdev->bdev,b2)); | |
1819 | return -EINVAL; | |
1820 | } | |
1821 | ev1 = le64_to_cpu(sb->events); | |
1822 | ev2 = le64_to_cpu(refsb->events); | |
1823 | ||
228fc7d7 | 1824 | if (!spare_disk && ev1 > ev2) |
8ed75463 N |
1825 | ret = 1; |
1826 | else | |
1827 | ret = 0; | |
1da177e4 | 1828 | } |
c6563a8c N |
1829 | if (minor_version) { |
1830 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9); | |
1831 | sectors -= rdev->data_offset; | |
1832 | } else | |
1833 | sectors = rdev->sb_start; | |
1834 | if (sectors < le64_to_cpu(sb->data_size)) | |
1da177e4 | 1835 | return -EINVAL; |
dd8ac336 | 1836 | rdev->sectors = le64_to_cpu(sb->data_size); |
8ed75463 | 1837 | return ret; |
1da177e4 LT |
1838 | } |
1839 | ||
fd01b88c | 1840 | static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 1841 | { |
65a06f06 | 1842 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
07d84d10 | 1843 | __u64 ev1 = le64_to_cpu(sb->events); |
1da177e4 | 1844 | |
41158c7e | 1845 | rdev->raid_disk = -1; |
c5d79adb N |
1846 | clear_bit(Faulty, &rdev->flags); |
1847 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1848 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1849 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1850 | |
1da177e4 LT |
1851 | if (mddev->raid_disks == 0) { |
1852 | mddev->major_version = 1; | |
1853 | mddev->patch_version = 0; | |
e691063a | 1854 | mddev->external = 0; |
9d8f0363 | 1855 | mddev->chunk_sectors = le32_to_cpu(sb->chunksize); |
9ebc6ef1 DD |
1856 | mddev->ctime = le64_to_cpu(sb->ctime); |
1857 | mddev->utime = le64_to_cpu(sb->utime); | |
1da177e4 | 1858 | mddev->level = le32_to_cpu(sb->level); |
d9d166c2 | 1859 | mddev->clevel[0] = 0; |
1da177e4 LT |
1860 | mddev->layout = le32_to_cpu(sb->layout); |
1861 | mddev->raid_disks = le32_to_cpu(sb->raid_disks); | |
58c0fed4 | 1862 | mddev->dev_sectors = le64_to_cpu(sb->size); |
07d84d10 | 1863 | mddev->events = ev1; |
c3d9714e | 1864 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1865 | mddev->bitmap_info.space = 0; |
1866 | /* Default location for bitmap is 1K after superblock | |
1867 | * using 3K - total of 4K | |
1868 | */ | |
c3d9714e | 1869 | mddev->bitmap_info.default_offset = 1024 >> 9; |
6409bb05 | 1870 | mddev->bitmap_info.default_space = (4096-1024) >> 9; |
2c810cdd N |
1871 | mddev->reshape_backwards = 0; |
1872 | ||
1da177e4 LT |
1873 | mddev->recovery_cp = le64_to_cpu(sb->resync_offset); |
1874 | memcpy(mddev->uuid, sb->set_uuid, 16); | |
1875 | ||
1876 | mddev->max_disks = (4096-256)/2; | |
a654b9d8 | 1877 | |
71c0805c | 1878 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) && |
6409bb05 | 1879 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1880 | mddev->bitmap_info.offset = |
1881 | (__s32)le32_to_cpu(sb->bitmap_offset); | |
6409bb05 N |
1882 | /* Metadata doesn't record how much space is available. |
1883 | * For 1.0, we assume we can use up to the superblock | |
1884 | * if before, else to 4K beyond superblock. | |
1885 | * For others, assume no change is possible. | |
1886 | */ | |
1887 | if (mddev->minor_version > 0) | |
1888 | mddev->bitmap_info.space = 0; | |
1889 | else if (mddev->bitmap_info.offset > 0) | |
1890 | mddev->bitmap_info.space = | |
1891 | 8 - mddev->bitmap_info.offset; | |
1892 | else | |
1893 | mddev->bitmap_info.space = | |
1894 | -mddev->bitmap_info.offset; | |
1895 | } | |
e11e93fa | 1896 | |
f6705578 N |
1897 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { |
1898 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); | |
1899 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); | |
1900 | mddev->new_level = le32_to_cpu(sb->new_level); | |
1901 | mddev->new_layout = le32_to_cpu(sb->new_layout); | |
664e7c41 | 1902 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_chunk); |
2c810cdd N |
1903 | if (mddev->delta_disks < 0 || |
1904 | (mddev->delta_disks == 0 && | |
1905 | (le32_to_cpu(sb->feature_map) | |
1906 | & MD_FEATURE_RESHAPE_BACKWARDS))) | |
1907 | mddev->reshape_backwards = 1; | |
f6705578 N |
1908 | } else { |
1909 | mddev->reshape_position = MaxSector; | |
1910 | mddev->delta_disks = 0; | |
1911 | mddev->new_level = mddev->level; | |
1912 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1913 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1914 | } |
1915 | ||
33f2c35a N |
1916 | if (mddev->level == 0 && |
1917 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT)) | |
1918 | mddev->layout = -1; | |
1919 | ||
486b0f7b | 1920 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL) |
a62ab49e | 1921 | set_bit(MD_HAS_JOURNAL, &mddev->flags); |
ea0213e0 | 1922 | |
ddc08823 PB |
1923 | if (le32_to_cpu(sb->feature_map) & |
1924 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS)) { | |
ea0213e0 AP |
1925 | if (le32_to_cpu(sb->feature_map) & |
1926 | (MD_FEATURE_BITMAP_OFFSET | MD_FEATURE_JOURNAL)) | |
1927 | return -EINVAL; | |
ddc08823 PB |
1928 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_PPL) && |
1929 | (le32_to_cpu(sb->feature_map) & | |
1930 | MD_FEATURE_MULTIPLE_PPLS)) | |
1931 | return -EINVAL; | |
ea0213e0 AP |
1932 | set_bit(MD_HAS_PPL, &mddev->flags); |
1933 | } | |
41158c7e | 1934 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1935 | /* Insist of good event counter while assembling, except for |
1936 | * spares (which don't need an event count) */ | |
1da177e4 | 1937 | ++ev1; |
be6800a7 N |
1938 | if (rdev->desc_nr >= 0 && |
1939 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
a3dfbdaa SL |
1940 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || |
1941 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL)) | |
be6800a7 N |
1942 | if (ev1 < mddev->events) |
1943 | return -EINVAL; | |
41158c7e N |
1944 | } else if (mddev->bitmap) { |
1945 | /* If adding to array with a bitmap, then we can accept an | |
1946 | * older device, but not too old. | |
1947 | */ | |
41158c7e N |
1948 | if (ev1 < mddev->bitmap->events_cleared) |
1949 | return 0; | |
8313b8e5 N |
1950 | if (ev1 < mddev->events) |
1951 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1952 | } else { |
1953 | if (ev1 < mddev->events) | |
1954 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1955 | return 0; | |
1956 | } | |
1da177e4 LT |
1957 | if (mddev->level != LEVEL_MULTIPATH) { |
1958 | int role; | |
3673f305 N |
1959 | if (rdev->desc_nr < 0 || |
1960 | rdev->desc_nr >= le32_to_cpu(sb->max_dev)) { | |
c4d4c91b | 1961 | role = MD_DISK_ROLE_SPARE; |
3673f305 N |
1962 | rdev->desc_nr = -1; |
1963 | } else | |
1964 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
1da177e4 | 1965 | switch(role) { |
c4d4c91b | 1966 | case MD_DISK_ROLE_SPARE: /* spare */ |
1da177e4 | 1967 | break; |
c4d4c91b | 1968 | case MD_DISK_ROLE_FAULTY: /* faulty */ |
b2d444d7 | 1969 | set_bit(Faulty, &rdev->flags); |
1da177e4 | 1970 | break; |
bac624f3 SL |
1971 | case MD_DISK_ROLE_JOURNAL: /* journal device */ |
1972 | if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL)) { | |
1973 | /* journal device without journal feature */ | |
9d48739e | 1974 | pr_warn("md: journal device provided without journal feature, ignoring the device\n"); |
bac624f3 SL |
1975 | return -EINVAL; |
1976 | } | |
1977 | set_bit(Journal, &rdev->flags); | |
3069aa8d | 1978 | rdev->journal_tail = le64_to_cpu(sb->journal_tail); |
9b15603d | 1979 | rdev->raid_disk = 0; |
bac624f3 | 1980 | break; |
1da177e4 | 1981 | default: |
f466722c | 1982 | rdev->saved_raid_disk = role; |
5fd6c1dc | 1983 | if ((le32_to_cpu(sb->feature_map) & |
f466722c | 1984 | MD_FEATURE_RECOVERY_OFFSET)) { |
5fd6c1dc | 1985 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); |
f466722c N |
1986 | if (!(le32_to_cpu(sb->feature_map) & |
1987 | MD_FEATURE_RECOVERY_BITMAP)) | |
1988 | rdev->saved_raid_disk = -1; | |
062f5b2a GJ |
1989 | } else { |
1990 | /* | |
1991 | * If the array is FROZEN, then the device can't | |
1992 | * be in_sync with rest of array. | |
1993 | */ | |
1994 | if (!test_bit(MD_RECOVERY_FROZEN, | |
1995 | &mddev->recovery)) | |
1996 | set_bit(In_sync, &rdev->flags); | |
1997 | } | |
1da177e4 LT |
1998 | rdev->raid_disk = role; |
1999 | break; | |
2000 | } | |
8ddf9efe N |
2001 | if (sb->devflags & WriteMostly1) |
2002 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
2003 | if (sb->devflags & FailFast1) |
2004 | set_bit(FailFast, &rdev->flags); | |
2d78f8c4 N |
2005 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) |
2006 | set_bit(Replacement, &rdev->flags); | |
41158c7e | 2007 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 2008 | set_bit(In_sync, &rdev->flags); |
41158c7e | 2009 | |
1da177e4 LT |
2010 | return 0; |
2011 | } | |
2012 | ||
fd01b88c | 2013 | static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
2014 | { |
2015 | struct mdp_superblock_1 *sb; | |
3cb03002 | 2016 | struct md_rdev *rdev2; |
1da177e4 LT |
2017 | int max_dev, i; |
2018 | /* make rdev->sb match mddev and rdev data. */ | |
2019 | ||
65a06f06 | 2020 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
2021 | |
2022 | sb->feature_map = 0; | |
2023 | sb->pad0 = 0; | |
5fd6c1dc | 2024 | sb->recovery_offset = cpu_to_le64(0); |
1da177e4 LT |
2025 | memset(sb->pad3, 0, sizeof(sb->pad3)); |
2026 | ||
2027 | sb->utime = cpu_to_le64((__u64)mddev->utime); | |
2028 | sb->events = cpu_to_le64(mddev->events); | |
2029 | if (mddev->in_sync) | |
2030 | sb->resync_offset = cpu_to_le64(mddev->recovery_cp); | |
bd18f646 SL |
2031 | else if (test_bit(MD_JOURNAL_CLEAN, &mddev->flags)) |
2032 | sb->resync_offset = cpu_to_le64(MaxSector); | |
1da177e4 LT |
2033 | else |
2034 | sb->resync_offset = cpu_to_le64(0); | |
2035 | ||
1c05b4bc | 2036 | sb->cnt_corrected_read = cpu_to_le32(atomic_read(&rdev->corrected_errors)); |
4dbcdc75 | 2037 | |
f0ca340c | 2038 | sb->raid_disks = cpu_to_le32(mddev->raid_disks); |
58c0fed4 | 2039 | sb->size = cpu_to_le64(mddev->dev_sectors); |
9d8f0363 | 2040 | sb->chunksize = cpu_to_le32(mddev->chunk_sectors); |
62e1e389 N |
2041 | sb->level = cpu_to_le32(mddev->level); |
2042 | sb->layout = cpu_to_le32(mddev->layout); | |
688834e6 N |
2043 | if (test_bit(FailFast, &rdev->flags)) |
2044 | sb->devflags |= FailFast1; | |
2045 | else | |
2046 | sb->devflags &= ~FailFast1; | |
f0ca340c | 2047 | |
aeb9b211 N |
2048 | if (test_bit(WriteMostly, &rdev->flags)) |
2049 | sb->devflags |= WriteMostly1; | |
2050 | else | |
2051 | sb->devflags &= ~WriteMostly1; | |
c6563a8c N |
2052 | sb->data_offset = cpu_to_le64(rdev->data_offset); |
2053 | sb->data_size = cpu_to_le64(rdev->sectors); | |
aeb9b211 | 2054 | |
c3d9714e N |
2055 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) { |
2056 | sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset); | |
71c0805c | 2057 | sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); |
a654b9d8 | 2058 | } |
5fd6c1dc | 2059 | |
f2076e7d | 2060 | if (rdev->raid_disk >= 0 && !test_bit(Journal, &rdev->flags) && |
97e4f42d | 2061 | !test_bit(In_sync, &rdev->flags)) { |
93be75ff N |
2062 | sb->feature_map |= |
2063 | cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET); | |
2064 | sb->recovery_offset = | |
2065 | cpu_to_le64(rdev->recovery_offset); | |
f466722c N |
2066 | if (rdev->saved_raid_disk >= 0 && mddev->bitmap) |
2067 | sb->feature_map |= | |
2068 | cpu_to_le32(MD_FEATURE_RECOVERY_BITMAP); | |
5fd6c1dc | 2069 | } |
3069aa8d SL |
2070 | /* Note: recovery_offset and journal_tail share space */ |
2071 | if (test_bit(Journal, &rdev->flags)) | |
2072 | sb->journal_tail = cpu_to_le64(rdev->journal_tail); | |
2d78f8c4 N |
2073 | if (test_bit(Replacement, &rdev->flags)) |
2074 | sb->feature_map |= | |
2075 | cpu_to_le32(MD_FEATURE_REPLACEMENT); | |
5fd6c1dc | 2076 | |
f6705578 N |
2077 | if (mddev->reshape_position != MaxSector) { |
2078 | sb->feature_map |= cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); | |
2079 | sb->reshape_position = cpu_to_le64(mddev->reshape_position); | |
2080 | sb->new_layout = cpu_to_le32(mddev->new_layout); | |
2081 | sb->delta_disks = cpu_to_le32(mddev->delta_disks); | |
2082 | sb->new_level = cpu_to_le32(mddev->new_level); | |
664e7c41 | 2083 | sb->new_chunk = cpu_to_le32(mddev->new_chunk_sectors); |
2c810cdd N |
2084 | if (mddev->delta_disks == 0 && |
2085 | mddev->reshape_backwards) | |
2086 | sb->feature_map | |
2087 | |= cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS); | |
c6563a8c N |
2088 | if (rdev->new_data_offset != rdev->data_offset) { |
2089 | sb->feature_map | |
2090 | |= cpu_to_le32(MD_FEATURE_NEW_OFFSET); | |
2091 | sb->new_offset = cpu_to_le32((__u32)(rdev->new_data_offset | |
2092 | - rdev->data_offset)); | |
2093 | } | |
f6705578 | 2094 | } |
a654b9d8 | 2095 | |
3c462c88 GR |
2096 | if (mddev_is_clustered(mddev)) |
2097 | sb->feature_map |= cpu_to_le32(MD_FEATURE_CLUSTERED); | |
2098 | ||
2699b672 N |
2099 | if (rdev->badblocks.count == 0) |
2100 | /* Nothing to do for bad blocks*/ ; | |
2101 | else if (sb->bblog_offset == 0) | |
2102 | /* Cannot record bad blocks on this device */ | |
2103 | md_error(mddev, rdev); | |
2104 | else { | |
2105 | struct badblocks *bb = &rdev->badblocks; | |
ae50640b | 2106 | __le64 *bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
2107 | u64 *p = bb->page; |
2108 | sb->feature_map |= cpu_to_le32(MD_FEATURE_BAD_BLOCKS); | |
2109 | if (bb->changed) { | |
2110 | unsigned seq; | |
2111 | ||
2112 | retry: | |
2113 | seq = read_seqbegin(&bb->lock); | |
2114 | ||
2115 | memset(bbp, 0xff, PAGE_SIZE); | |
2116 | ||
2117 | for (i = 0 ; i < bb->count ; i++) { | |
35f9ac2d | 2118 | u64 internal_bb = p[i]; |
2699b672 N |
2119 | u64 store_bb = ((BB_OFFSET(internal_bb) << 10) |
2120 | | BB_LEN(internal_bb)); | |
35f9ac2d | 2121 | bbp[i] = cpu_to_le64(store_bb); |
2699b672 | 2122 | } |
d0962936 | 2123 | bb->changed = 0; |
2699b672 N |
2124 | if (read_seqretry(&bb->lock, seq)) |
2125 | goto retry; | |
2126 | ||
2127 | bb->sector = (rdev->sb_start + | |
2128 | (int)le32_to_cpu(sb->bblog_offset)); | |
2129 | bb->size = le16_to_cpu(sb->bblog_size); | |
2699b672 N |
2130 | } |
2131 | } | |
2132 | ||
1da177e4 | 2133 | max_dev = 0; |
dafb20fa | 2134 | rdev_for_each(rdev2, mddev) |
1da177e4 LT |
2135 | if (rdev2->desc_nr+1 > max_dev) |
2136 | max_dev = rdev2->desc_nr+1; | |
a778b73f | 2137 | |
70471daf N |
2138 | if (max_dev > le32_to_cpu(sb->max_dev)) { |
2139 | int bmask; | |
a778b73f | 2140 | sb->max_dev = cpu_to_le32(max_dev); |
70471daf N |
2141 | rdev->sb_size = max_dev * 2 + 256; |
2142 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; | |
2143 | if (rdev->sb_size & bmask) | |
2144 | rdev->sb_size = (rdev->sb_size | bmask) + 1; | |
ddcf3522 N |
2145 | } else |
2146 | max_dev = le32_to_cpu(sb->max_dev); | |
2147 | ||
1da177e4 | 2148 | for (i=0; i<max_dev;i++) |
8df72024 | 2149 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
f72ffdd6 | 2150 | |
a97b7896 SL |
2151 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) |
2152 | sb->feature_map |= cpu_to_le32(MD_FEATURE_JOURNAL); | |
f72ffdd6 | 2153 | |
ea0213e0 | 2154 | if (test_bit(MD_HAS_PPL, &mddev->flags)) { |
ddc08823 PB |
2155 | if (test_bit(MD_HAS_MULTIPLE_PPLS, &mddev->flags)) |
2156 | sb->feature_map |= | |
2157 | cpu_to_le32(MD_FEATURE_MULTIPLE_PPLS); | |
2158 | else | |
2159 | sb->feature_map |= cpu_to_le32(MD_FEATURE_PPL); | |
ea0213e0 AP |
2160 | sb->ppl.offset = cpu_to_le16(rdev->ppl.offset); |
2161 | sb->ppl.size = cpu_to_le16(rdev->ppl.size); | |
2162 | } | |
2163 | ||
dafb20fa | 2164 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 2165 | i = rdev2->desc_nr; |
b2d444d7 | 2166 | if (test_bit(Faulty, &rdev2->flags)) |
c4d4c91b | 2167 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY); |
b2d444d7 | 2168 | else if (test_bit(In_sync, &rdev2->flags)) |
1da177e4 | 2169 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
a97b7896 | 2170 | else if (test_bit(Journal, &rdev2->flags)) |
bac624f3 | 2171 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_JOURNAL); |
93be75ff | 2172 | else if (rdev2->raid_disk >= 0) |
5fd6c1dc | 2173 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
1da177e4 | 2174 | else |
c4d4c91b | 2175 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
1da177e4 LT |
2176 | } |
2177 | ||
1da177e4 LT |
2178 | sb->sb_csum = calc_sb_1_csum(sb); |
2179 | } | |
2180 | ||
d9c0fa50 XN |
2181 | static sector_t super_1_choose_bm_space(sector_t dev_size) |
2182 | { | |
2183 | sector_t bm_space; | |
2184 | ||
2185 | /* if the device is bigger than 8Gig, save 64k for bitmap | |
2186 | * usage, if bigger than 200Gig, save 128k | |
2187 | */ | |
2188 | if (dev_size < 64*2) | |
2189 | bm_space = 0; | |
2190 | else if (dev_size - 64*2 >= 200*1024*1024*2) | |
2191 | bm_space = 128*2; | |
2192 | else if (dev_size - 4*2 > 8*1024*1024*2) | |
2193 | bm_space = 64*2; | |
2194 | else | |
2195 | bm_space = 4*2; | |
2196 | return bm_space; | |
2197 | } | |
2198 | ||
0cd17fec | 2199 | static unsigned long long |
3cb03002 | 2200 | super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec CW |
2201 | { |
2202 | struct mdp_superblock_1 *sb; | |
15f4a5fd | 2203 | sector_t max_sectors; |
58c0fed4 | 2204 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 2205 | return 0; /* component must fit device */ |
c6563a8c N |
2206 | if (rdev->data_offset != rdev->new_data_offset) |
2207 | return 0; /* too confusing */ | |
0f420358 | 2208 | if (rdev->sb_start < rdev->data_offset) { |
0cd17fec | 2209 | /* minor versions 1 and 2; superblock before data */ |
77304d2a | 2210 | max_sectors = i_size_read(rdev->bdev->bd_inode) >> 9; |
15f4a5fd AN |
2211 | max_sectors -= rdev->data_offset; |
2212 | if (!num_sectors || num_sectors > max_sectors) | |
2213 | num_sectors = max_sectors; | |
c3d9714e | 2214 | } else if (rdev->mddev->bitmap_info.offset) { |
0cd17fec CW |
2215 | /* minor version 0 with bitmap we can't move */ |
2216 | return 0; | |
2217 | } else { | |
2218 | /* minor version 0; superblock after data */ | |
d9c0fa50 XN |
2219 | sector_t sb_start, bm_space; |
2220 | sector_t dev_size = i_size_read(rdev->bdev->bd_inode) >> 9; | |
2221 | ||
2222 | /* 8K is for superblock */ | |
2223 | sb_start = dev_size - 8*2; | |
0f420358 | 2224 | sb_start &= ~(sector_t)(4*2 - 1); |
d9c0fa50 XN |
2225 | |
2226 | bm_space = super_1_choose_bm_space(dev_size); | |
2227 | ||
2228 | /* Space that can be used to store date needs to decrease | |
2229 | * superblock bitmap space and bad block space(4K) | |
2230 | */ | |
2231 | max_sectors = sb_start - bm_space - 4*2; | |
2232 | ||
15f4a5fd AN |
2233 | if (!num_sectors || num_sectors > max_sectors) |
2234 | num_sectors = max_sectors; | |
0cd17fec | 2235 | } |
65a06f06 | 2236 | sb = page_address(rdev->sb_page); |
15f4a5fd | 2237 | sb->data_size = cpu_to_le64(num_sectors); |
3fb632e4 | 2238 | sb->super_offset = cpu_to_le64(rdev->sb_start); |
0cd17fec | 2239 | sb->sb_csum = calc_sb_1_csum(sb); |
46533ff7 N |
2240 | do { |
2241 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
2242 | rdev->sb_page); | |
2243 | } while (md_super_wait(rdev->mddev) < 0); | |
c26a44ed | 2244 | return num_sectors; |
c6563a8c N |
2245 | |
2246 | } | |
2247 | ||
2248 | static int | |
2249 | super_1_allow_new_offset(struct md_rdev *rdev, | |
2250 | unsigned long long new_offset) | |
2251 | { | |
2252 | /* All necessary checks on new >= old have been done */ | |
2253 | struct bitmap *bitmap; | |
2254 | if (new_offset >= rdev->data_offset) | |
2255 | return 1; | |
2256 | ||
2257 | /* with 1.0 metadata, there is no metadata to tread on | |
2258 | * so we can always move back */ | |
2259 | if (rdev->mddev->minor_version == 0) | |
2260 | return 1; | |
2261 | ||
2262 | /* otherwise we must be sure not to step on | |
2263 | * any metadata, so stay: | |
2264 | * 36K beyond start of superblock | |
2265 | * beyond end of badblocks | |
2266 | * beyond write-intent bitmap | |
2267 | */ | |
2268 | if (rdev->sb_start + (32+4)*2 > new_offset) | |
2269 | return 0; | |
2270 | bitmap = rdev->mddev->bitmap; | |
2271 | if (bitmap && !rdev->mddev->bitmap_info.file && | |
2272 | rdev->sb_start + rdev->mddev->bitmap_info.offset + | |
1ec885cd | 2273 | bitmap->storage.file_pages * (PAGE_SIZE>>9) > new_offset) |
c6563a8c N |
2274 | return 0; |
2275 | if (rdev->badblocks.sector + rdev->badblocks.size > new_offset) | |
2276 | return 0; | |
2277 | ||
2278 | return 1; | |
0cd17fec | 2279 | } |
1da177e4 | 2280 | |
75c96f85 | 2281 | static struct super_type super_types[] = { |
1da177e4 LT |
2282 | [0] = { |
2283 | .name = "0.90.0", | |
2284 | .owner = THIS_MODULE, | |
0cd17fec CW |
2285 | .load_super = super_90_load, |
2286 | .validate_super = super_90_validate, | |
2287 | .sync_super = super_90_sync, | |
2288 | .rdev_size_change = super_90_rdev_size_change, | |
c6563a8c | 2289 | .allow_new_offset = super_90_allow_new_offset, |
1da177e4 LT |
2290 | }, |
2291 | [1] = { | |
2292 | .name = "md-1", | |
2293 | .owner = THIS_MODULE, | |
0cd17fec CW |
2294 | .load_super = super_1_load, |
2295 | .validate_super = super_1_validate, | |
2296 | .sync_super = super_1_sync, | |
2297 | .rdev_size_change = super_1_rdev_size_change, | |
c6563a8c | 2298 | .allow_new_offset = super_1_allow_new_offset, |
1da177e4 LT |
2299 | }, |
2300 | }; | |
1da177e4 | 2301 | |
fd01b88c | 2302 | static void sync_super(struct mddev *mddev, struct md_rdev *rdev) |
076f968b JB |
2303 | { |
2304 | if (mddev->sync_super) { | |
2305 | mddev->sync_super(mddev, rdev); | |
2306 | return; | |
2307 | } | |
2308 | ||
2309 | BUG_ON(mddev->major_version >= ARRAY_SIZE(super_types)); | |
2310 | ||
2311 | super_types[mddev->major_version].sync_super(mddev, rdev); | |
2312 | } | |
2313 | ||
fd01b88c | 2314 | static int match_mddev_units(struct mddev *mddev1, struct mddev *mddev2) |
1da177e4 | 2315 | { |
3cb03002 | 2316 | struct md_rdev *rdev, *rdev2; |
1da177e4 | 2317 | |
4b80991c | 2318 | rcu_read_lock(); |
0b020e85 SL |
2319 | rdev_for_each_rcu(rdev, mddev1) { |
2320 | if (test_bit(Faulty, &rdev->flags) || | |
2321 | test_bit(Journal, &rdev->flags) || | |
2322 | rdev->raid_disk == -1) | |
2323 | continue; | |
2324 | rdev_for_each_rcu(rdev2, mddev2) { | |
2325 | if (test_bit(Faulty, &rdev2->flags) || | |
2326 | test_bit(Journal, &rdev2->flags) || | |
2327 | rdev2->raid_disk == -1) | |
2328 | continue; | |
61a27e1f | 2329 | if (rdev->bdev->bd_disk == rdev2->bdev->bd_disk) { |
4b80991c | 2330 | rcu_read_unlock(); |
7dd5e7c3 | 2331 | return 1; |
4b80991c | 2332 | } |
0b020e85 SL |
2333 | } |
2334 | } | |
4b80991c | 2335 | rcu_read_unlock(); |
1da177e4 LT |
2336 | return 0; |
2337 | } | |
2338 | ||
2339 | static LIST_HEAD(pending_raid_disks); | |
2340 | ||
ac5e7113 AN |
2341 | /* |
2342 | * Try to register data integrity profile for an mddev | |
2343 | * | |
2344 | * This is called when an array is started and after a disk has been kicked | |
2345 | * from the array. It only succeeds if all working and active component devices | |
2346 | * are integrity capable with matching profiles. | |
2347 | */ | |
fd01b88c | 2348 | int md_integrity_register(struct mddev *mddev) |
ac5e7113 | 2349 | { |
3cb03002 | 2350 | struct md_rdev *rdev, *reference = NULL; |
ac5e7113 AN |
2351 | |
2352 | if (list_empty(&mddev->disks)) | |
2353 | return 0; /* nothing to do */ | |
629acb6a JB |
2354 | if (!mddev->gendisk || blk_get_integrity(mddev->gendisk)) |
2355 | return 0; /* shouldn't register, or already is */ | |
dafb20fa | 2356 | rdev_for_each(rdev, mddev) { |
ac5e7113 AN |
2357 | /* skip spares and non-functional disks */ |
2358 | if (test_bit(Faulty, &rdev->flags)) | |
2359 | continue; | |
2360 | if (rdev->raid_disk < 0) | |
2361 | continue; | |
ac5e7113 AN |
2362 | if (!reference) { |
2363 | /* Use the first rdev as the reference */ | |
2364 | reference = rdev; | |
2365 | continue; | |
2366 | } | |
2367 | /* does this rdev's profile match the reference profile? */ | |
2368 | if (blk_integrity_compare(reference->bdev->bd_disk, | |
2369 | rdev->bdev->bd_disk) < 0) | |
2370 | return -EINVAL; | |
2371 | } | |
89078d57 MP |
2372 | if (!reference || !bdev_get_integrity(reference->bdev)) |
2373 | return 0; | |
ac5e7113 AN |
2374 | /* |
2375 | * All component devices are integrity capable and have matching | |
2376 | * profiles, register the common profile for the md device. | |
2377 | */ | |
25520d55 MP |
2378 | blk_integrity_register(mddev->gendisk, |
2379 | bdev_get_integrity(reference->bdev)); | |
2380 | ||
9d48739e | 2381 | pr_debug("md: data integrity enabled on %s\n", mdname(mddev)); |
afeee514 | 2382 | if (bioset_integrity_create(&mddev->bio_set, BIO_POOL_SIZE)) { |
9d48739e | 2383 | pr_err("md: failed to create integrity pool for %s\n", |
a91a2785 MP |
2384 | mdname(mddev)); |
2385 | return -EINVAL; | |
2386 | } | |
ac5e7113 AN |
2387 | return 0; |
2388 | } | |
2389 | EXPORT_SYMBOL(md_integrity_register); | |
2390 | ||
1501efad DW |
2391 | /* |
2392 | * Attempt to add an rdev, but only if it is consistent with the current | |
2393 | * integrity profile | |
2394 | */ | |
2395 | int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev) | |
3f9d99c1 | 2396 | { |
2863b9eb | 2397 | struct blk_integrity *bi_mddev; |
1501efad | 2398 | char name[BDEVNAME_SIZE]; |
2863b9eb JB |
2399 | |
2400 | if (!mddev->gendisk) | |
1501efad | 2401 | return 0; |
2863b9eb | 2402 | |
2863b9eb | 2403 | bi_mddev = blk_get_integrity(mddev->gendisk); |
3f9d99c1 | 2404 | |
ac5e7113 | 2405 | if (!bi_mddev) /* nothing to do */ |
1501efad DW |
2406 | return 0; |
2407 | ||
2408 | if (blk_integrity_compare(mddev->gendisk, rdev->bdev->bd_disk) != 0) { | |
9d48739e N |
2409 | pr_err("%s: incompatible integrity profile for %s\n", |
2410 | mdname(mddev), bdevname(rdev->bdev, name)); | |
1501efad DW |
2411 | return -ENXIO; |
2412 | } | |
2413 | ||
2414 | return 0; | |
3f9d99c1 | 2415 | } |
ac5e7113 | 2416 | EXPORT_SYMBOL(md_integrity_add_rdev); |
3f9d99c1 | 2417 | |
d7a47838 CH |
2418 | static bool rdev_read_only(struct md_rdev *rdev) |
2419 | { | |
2420 | return bdev_read_only(rdev->bdev) || | |
2421 | (rdev->meta_bdev && bdev_read_only(rdev->meta_bdev)); | |
2422 | } | |
2423 | ||
f72ffdd6 | 2424 | static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) |
1da177e4 | 2425 | { |
7dd5e7c3 | 2426 | char b[BDEVNAME_SIZE]; |
5e55e2f5 | 2427 | int err; |
1da177e4 | 2428 | |
11e2ede0 DW |
2429 | /* prevent duplicates */ |
2430 | if (find_rdev(mddev, rdev->bdev->bd_dev)) | |
2431 | return -EEXIST; | |
2432 | ||
d7a47838 | 2433 | if (rdev_read_only(rdev) && mddev->pers) |
97b20ef7 N |
2434 | return -EROFS; |
2435 | ||
dd8ac336 | 2436 | /* make sure rdev->sectors exceeds mddev->dev_sectors */ |
f6b6ec5c SL |
2437 | if (!test_bit(Journal, &rdev->flags) && |
2438 | rdev->sectors && | |
2439 | (mddev->dev_sectors == 0 || rdev->sectors < mddev->dev_sectors)) { | |
a778b73f N |
2440 | if (mddev->pers) { |
2441 | /* Cannot change size, so fail | |
2442 | * If mddev->level <= 0, then we don't care | |
2443 | * about aligning sizes (e.g. linear) | |
2444 | */ | |
2445 | if (mddev->level > 0) | |
2446 | return -ENOSPC; | |
2447 | } else | |
dd8ac336 | 2448 | mddev->dev_sectors = rdev->sectors; |
2bf071bf | 2449 | } |
1da177e4 LT |
2450 | |
2451 | /* Verify rdev->desc_nr is unique. | |
2452 | * If it is -1, assign a free number, else | |
2453 | * check number is not in use | |
2454 | */ | |
4878e9eb | 2455 | rcu_read_lock(); |
1da177e4 LT |
2456 | if (rdev->desc_nr < 0) { |
2457 | int choice = 0; | |
4878e9eb N |
2458 | if (mddev->pers) |
2459 | choice = mddev->raid_disks; | |
57d051dc | 2460 | while (md_find_rdev_nr_rcu(mddev, choice)) |
1da177e4 LT |
2461 | choice++; |
2462 | rdev->desc_nr = choice; | |
2463 | } else { | |
57d051dc | 2464 | if (md_find_rdev_nr_rcu(mddev, rdev->desc_nr)) { |
4878e9eb | 2465 | rcu_read_unlock(); |
1da177e4 | 2466 | return -EBUSY; |
4878e9eb | 2467 | } |
1da177e4 | 2468 | } |
4878e9eb | 2469 | rcu_read_unlock(); |
f6b6ec5c SL |
2470 | if (!test_bit(Journal, &rdev->flags) && |
2471 | mddev->max_disks && rdev->desc_nr >= mddev->max_disks) { | |
9d48739e N |
2472 | pr_warn("md: %s: array is limited to %d devices\n", |
2473 | mdname(mddev), mddev->max_disks); | |
de01dfad N |
2474 | return -EBUSY; |
2475 | } | |
19133a42 | 2476 | bdevname(rdev->bdev,b); |
90a9befb | 2477 | strreplace(b, '/', '!'); |
649316b2 | 2478 | |
1da177e4 | 2479 | rdev->mddev = mddev; |
9d48739e | 2480 | pr_debug("md: bind<%s>\n", b); |
86e6ffdd | 2481 | |
963c555e | 2482 | if (mddev->raid_disks) |
404659cf | 2483 | mddev_create_serial_pool(mddev, rdev, false); |
963c555e | 2484 | |
b2d6db58 | 2485 | if ((err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b))) |
5e55e2f5 | 2486 | goto fail; |
86e6ffdd | 2487 | |
5e3b8a8d | 2488 | /* failure here is OK */ |
8d65269f | 2489 | err = sysfs_create_link(&rdev->kobj, bdev_kobj(rdev->bdev), "block"); |
00bcb4ac | 2490 | rdev->sysfs_state = sysfs_get_dirent_safe(rdev->kobj.sd, "state"); |
e1a86dbb JB |
2491 | rdev->sysfs_unack_badblocks = |
2492 | sysfs_get_dirent_safe(rdev->kobj.sd, "unacknowledged_bad_blocks"); | |
2493 | rdev->sysfs_badblocks = | |
2494 | sysfs_get_dirent_safe(rdev->kobj.sd, "bad_blocks"); | |
3c0ee63a | 2495 | |
4b80991c | 2496 | list_add_rcu(&rdev->same_set, &mddev->disks); |
e09b457b | 2497 | bd_link_disk_holder(rdev->bdev, mddev->gendisk); |
4044ba58 N |
2498 | |
2499 | /* May as well allow recovery to be retried once */ | |
5389042f | 2500 | mddev->recovery_disabled++; |
3f9d99c1 | 2501 | |
1da177e4 | 2502 | return 0; |
5e55e2f5 N |
2503 | |
2504 | fail: | |
9d48739e N |
2505 | pr_warn("md: failed to register dev-%s for %s\n", |
2506 | b, mdname(mddev)); | |
5e55e2f5 | 2507 | return err; |
1da177e4 LT |
2508 | } |
2509 | ||
cc1ffe61 | 2510 | static void rdev_delayed_delete(struct work_struct *ws) |
5792a285 | 2511 | { |
3cb03002 | 2512 | struct md_rdev *rdev = container_of(ws, struct md_rdev, del_work); |
5792a285 | 2513 | kobject_del(&rdev->kobj); |
177a99b2 | 2514 | kobject_put(&rdev->kobj); |
5792a285 N |
2515 | } |
2516 | ||
f72ffdd6 | 2517 | static void unbind_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2518 | { |
2519 | char b[BDEVNAME_SIZE]; | |
403df478 | 2520 | |
49731baa | 2521 | bd_unlink_disk_holder(rdev->bdev, rdev->mddev->gendisk); |
4b80991c | 2522 | list_del_rcu(&rdev->same_set); |
9d48739e | 2523 | pr_debug("md: unbind<%s>\n", bdevname(rdev->bdev,b)); |
11d3a9f6 | 2524 | mddev_destroy_serial_pool(rdev->mddev, rdev, false); |
1da177e4 | 2525 | rdev->mddev = NULL; |
86e6ffdd | 2526 | sysfs_remove_link(&rdev->kobj, "block"); |
3c0ee63a | 2527 | sysfs_put(rdev->sysfs_state); |
e1a86dbb JB |
2528 | sysfs_put(rdev->sysfs_unack_badblocks); |
2529 | sysfs_put(rdev->sysfs_badblocks); | |
3c0ee63a | 2530 | rdev->sysfs_state = NULL; |
e1a86dbb JB |
2531 | rdev->sysfs_unack_badblocks = NULL; |
2532 | rdev->sysfs_badblocks = NULL; | |
2230dfe4 | 2533 | rdev->badblocks.count = 0; |
5792a285 | 2534 | /* We need to delay this, otherwise we can deadlock when |
4b80991c N |
2535 | * writing to 'remove' to "dev/state". We also need |
2536 | * to delay it due to rcu usage. | |
5792a285 | 2537 | */ |
4b80991c | 2538 | synchronize_rcu(); |
cc1ffe61 | 2539 | INIT_WORK(&rdev->del_work, rdev_delayed_delete); |
177a99b2 | 2540 | kobject_get(&rdev->kobj); |
cc1ffe61 | 2541 | queue_work(md_rdev_misc_wq, &rdev->del_work); |
1da177e4 LT |
2542 | } |
2543 | ||
2544 | /* | |
2545 | * prevent the device from being mounted, repartitioned or | |
2546 | * otherwise reused by a RAID array (or any other kernel | |
2547 | * subsystem), by bd_claiming the device. | |
2548 | */ | |
3cb03002 | 2549 | static int lock_rdev(struct md_rdev *rdev, dev_t dev, int shared) |
1da177e4 LT |
2550 | { |
2551 | int err = 0; | |
2552 | struct block_device *bdev; | |
1da177e4 | 2553 | |
d4d77629 | 2554 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, |
3cb03002 | 2555 | shared ? (struct md_rdev *)lock_rdev : rdev); |
1da177e4 | 2556 | if (IS_ERR(bdev)) { |
ea3edd4d CH |
2557 | pr_warn("md: could not open device unknown-block(%u,%u).\n", |
2558 | MAJOR(dev), MINOR(dev)); | |
1da177e4 LT |
2559 | return PTR_ERR(bdev); |
2560 | } | |
1da177e4 LT |
2561 | rdev->bdev = bdev; |
2562 | return err; | |
2563 | } | |
2564 | ||
3cb03002 | 2565 | static void unlock_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2566 | { |
2567 | struct block_device *bdev = rdev->bdev; | |
2568 | rdev->bdev = NULL; | |
e525fd89 | 2569 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
1da177e4 LT |
2570 | } |
2571 | ||
2572 | void md_autodetect_dev(dev_t dev); | |
2573 | ||
f72ffdd6 | 2574 | static void export_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2575 | { |
2576 | char b[BDEVNAME_SIZE]; | |
403df478 | 2577 | |
9d48739e | 2578 | pr_debug("md: export_rdev(%s)\n", bdevname(rdev->bdev,b)); |
545c8795 | 2579 | md_rdev_clear(rdev); |
1da177e4 | 2580 | #ifndef MODULE |
d0fae18f N |
2581 | if (test_bit(AutoDetected, &rdev->flags)) |
2582 | md_autodetect_dev(rdev->bdev->bd_dev); | |
1da177e4 LT |
2583 | #endif |
2584 | unlock_rdev(rdev); | |
86e6ffdd | 2585 | kobject_put(&rdev->kobj); |
1da177e4 LT |
2586 | } |
2587 | ||
fb56dfef | 2588 | void md_kick_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2589 | { |
2590 | unbind_rdev_from_array(rdev); | |
2591 | export_rdev(rdev); | |
2592 | } | |
fb56dfef | 2593 | EXPORT_SYMBOL_GPL(md_kick_rdev_from_array); |
1da177e4 | 2594 | |
fd01b88c | 2595 | static void export_array(struct mddev *mddev) |
1da177e4 | 2596 | { |
0638bb0e | 2597 | struct md_rdev *rdev; |
1da177e4 | 2598 | |
0638bb0e N |
2599 | while (!list_empty(&mddev->disks)) { |
2600 | rdev = list_first_entry(&mddev->disks, struct md_rdev, | |
2601 | same_set); | |
fb56dfef | 2602 | md_kick_rdev_from_array(rdev); |
1da177e4 | 2603 | } |
1da177e4 LT |
2604 | mddev->raid_disks = 0; |
2605 | mddev->major_version = 0; | |
2606 | } | |
2607 | ||
6497709b N |
2608 | static bool set_in_sync(struct mddev *mddev) |
2609 | { | |
efa4b77b | 2610 | lockdep_assert_held(&mddev->lock); |
4ad23a97 N |
2611 | if (!mddev->in_sync) { |
2612 | mddev->sync_checkers++; | |
2613 | spin_unlock(&mddev->lock); | |
2614 | percpu_ref_switch_to_atomic_sync(&mddev->writes_pending); | |
2615 | spin_lock(&mddev->lock); | |
2616 | if (!mddev->in_sync && | |
2617 | percpu_ref_is_zero(&mddev->writes_pending)) { | |
6497709b | 2618 | mddev->in_sync = 1; |
4ad23a97 N |
2619 | /* |
2620 | * Ensure ->in_sync is visible before we clear | |
2621 | * ->sync_checkers. | |
2622 | */ | |
55cc39f3 | 2623 | smp_mb(); |
6497709b N |
2624 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2625 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
2626 | } | |
4ad23a97 N |
2627 | if (--mddev->sync_checkers == 0) |
2628 | percpu_ref_switch_to_percpu(&mddev->writes_pending); | |
6497709b N |
2629 | } |
2630 | if (mddev->safemode == 1) | |
2631 | mddev->safemode = 0; | |
2632 | return mddev->in_sync; | |
2633 | } | |
2634 | ||
f72ffdd6 | 2635 | static void sync_sbs(struct mddev *mddev, int nospares) |
1da177e4 | 2636 | { |
42543769 N |
2637 | /* Update each superblock (in-memory image), but |
2638 | * if we are allowed to, skip spares which already | |
2639 | * have the right event counter, or have one earlier | |
2640 | * (which would mean they aren't being marked as dirty | |
2641 | * with the rest of the array) | |
2642 | */ | |
3cb03002 | 2643 | struct md_rdev *rdev; |
dafb20fa | 2644 | rdev_for_each(rdev, mddev) { |
42543769 N |
2645 | if (rdev->sb_events == mddev->events || |
2646 | (nospares && | |
2647 | rdev->raid_disk < 0 && | |
42543769 N |
2648 | rdev->sb_events+1 == mddev->events)) { |
2649 | /* Don't update this superblock */ | |
2650 | rdev->sb_loaded = 2; | |
2651 | } else { | |
076f968b | 2652 | sync_super(mddev, rdev); |
42543769 N |
2653 | rdev->sb_loaded = 1; |
2654 | } | |
1da177e4 LT |
2655 | } |
2656 | } | |
2657 | ||
2aa82191 GR |
2658 | static bool does_sb_need_changing(struct mddev *mddev) |
2659 | { | |
2660 | struct md_rdev *rdev; | |
2661 | struct mdp_superblock_1 *sb; | |
2662 | int role; | |
2663 | ||
2664 | /* Find a good rdev */ | |
2665 | rdev_for_each(rdev, mddev) | |
2666 | if ((rdev->raid_disk >= 0) && !test_bit(Faulty, &rdev->flags)) | |
2667 | break; | |
2668 | ||
2669 | /* No good device found. */ | |
2670 | if (!rdev) | |
2671 | return false; | |
2672 | ||
2673 | sb = page_address(rdev->sb_page); | |
2674 | /* Check if a device has become faulty or a spare become active */ | |
2675 | rdev_for_each(rdev, mddev) { | |
2676 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
2677 | /* Device activated? */ | |
2678 | if (role == 0xffff && rdev->raid_disk >=0 && | |
2679 | !test_bit(Faulty, &rdev->flags)) | |
2680 | return true; | |
2681 | /* Device turned faulty? */ | |
2682 | if (test_bit(Faulty, &rdev->flags) && (role < 0xfffd)) | |
2683 | return true; | |
2684 | } | |
2685 | ||
2686 | /* Check if any mddev parameters have changed */ | |
2687 | if ((mddev->dev_sectors != le64_to_cpu(sb->size)) || | |
2688 | (mddev->reshape_position != le64_to_cpu(sb->reshape_position)) || | |
13459213 | 2689 | (mddev->layout != le32_to_cpu(sb->layout)) || |
2aa82191 GR |
2690 | (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) || |
2691 | (mddev->chunk_sectors != le32_to_cpu(sb->chunksize))) | |
2692 | return true; | |
2693 | ||
2694 | return false; | |
2695 | } | |
2696 | ||
1aee41f6 | 2697 | void md_update_sb(struct mddev *mddev, int force_change) |
1da177e4 | 2698 | { |
3cb03002 | 2699 | struct md_rdev *rdev; |
06d91a5f | 2700 | int sync_req; |
42543769 | 2701 | int nospares = 0; |
2699b672 | 2702 | int any_badblocks_changed = 0; |
23b63f9f | 2703 | int ret = -1; |
1da177e4 | 2704 | |
d87f064f N |
2705 | if (mddev->ro) { |
2706 | if (force_change) | |
2953079c | 2707 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
d87f064f N |
2708 | return; |
2709 | } | |
2aa82191 | 2710 | |
2c97cf13 | 2711 | repeat: |
2aa82191 | 2712 | if (mddev_is_clustered(mddev)) { |
2953079c | 2713 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
2aa82191 | 2714 | force_change = 1; |
2953079c | 2715 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
85ad1d13 | 2716 | nospares = 1; |
23b63f9f | 2717 | ret = md_cluster_ops->metadata_update_start(mddev); |
2aa82191 GR |
2718 | /* Has someone else has updated the sb */ |
2719 | if (!does_sb_need_changing(mddev)) { | |
23b63f9f GJ |
2720 | if (ret == 0) |
2721 | md_cluster_ops->metadata_update_cancel(mddev); | |
2953079c SL |
2722 | bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2723 | BIT(MD_SB_CHANGE_DEVS) | | |
2724 | BIT(MD_SB_CHANGE_CLEAN)); | |
2aa82191 GR |
2725 | return; |
2726 | } | |
2727 | } | |
2c97cf13 | 2728 | |
db0505d3 N |
2729 | /* |
2730 | * First make sure individual recovery_offsets are correct | |
2731 | * curr_resync_completed can only be used during recovery. | |
2732 | * During reshape/resync it might use array-addresses rather | |
2733 | * that device addresses. | |
2734 | */ | |
dafb20fa | 2735 | rdev_for_each(rdev, mddev) { |
3a3a5ddb N |
2736 | if (rdev->raid_disk >= 0 && |
2737 | mddev->delta_disks >= 0 && | |
db0505d3 N |
2738 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
2739 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery) && | |
2740 | !test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
f2076e7d | 2741 | !test_bit(Journal, &rdev->flags) && |
3a3a5ddb N |
2742 | !test_bit(In_sync, &rdev->flags) && |
2743 | mddev->curr_resync_completed > rdev->recovery_offset) | |
2744 | rdev->recovery_offset = mddev->curr_resync_completed; | |
2745 | ||
f72ffdd6 | 2746 | } |
bd52b746 | 2747 | if (!mddev->persistent) { |
2953079c SL |
2748 | clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2749 | clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
de393cde | 2750 | if (!mddev->external) { |
2953079c | 2751 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
dafb20fa | 2752 | rdev_for_each(rdev, mddev) { |
de393cde | 2753 | if (rdev->badblocks.changed) { |
d0962936 | 2754 | rdev->badblocks.changed = 0; |
fc974ee2 | 2755 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2756 | md_error(mddev, rdev); |
2757 | } | |
2758 | clear_bit(Blocked, &rdev->flags); | |
2759 | clear_bit(BlockedBadBlocks, &rdev->flags); | |
2760 | wake_up(&rdev->blocked_wait); | |
2761 | } | |
2762 | } | |
3a3a5ddb N |
2763 | wake_up(&mddev->sb_wait); |
2764 | return; | |
2765 | } | |
2766 | ||
85572d7c | 2767 | spin_lock(&mddev->lock); |
84692195 | 2768 | |
9ebc6ef1 | 2769 | mddev->utime = ktime_get_real_seconds(); |
3a3a5ddb | 2770 | |
2953079c | 2771 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
850b2b42 | 2772 | force_change = 1; |
2953079c | 2773 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
850b2b42 N |
2774 | /* just a clean<-> dirty transition, possibly leave spares alone, |
2775 | * though if events isn't the right even/odd, we will have to do | |
2776 | * spares after all | |
2777 | */ | |
2778 | nospares = 1; | |
2779 | if (force_change) | |
2780 | nospares = 0; | |
2781 | if (mddev->degraded) | |
84692195 N |
2782 | /* If the array is degraded, then skipping spares is both |
2783 | * dangerous and fairly pointless. | |
2784 | * Dangerous because a device that was removed from the array | |
2785 | * might have a event_count that still looks up-to-date, | |
2786 | * so it can be re-added without a resync. | |
2787 | * Pointless because if there are any spares to skip, | |
2788 | * then a recovery will happen and soon that array won't | |
2789 | * be degraded any more and the spare can go back to sleep then. | |
2790 | */ | |
850b2b42 | 2791 | nospares = 0; |
84692195 | 2792 | |
06d91a5f | 2793 | sync_req = mddev->in_sync; |
42543769 N |
2794 | |
2795 | /* If this is just a dirty<->clean transition, and the array is clean | |
2796 | * and 'events' is odd, we can roll back to the previous clean state */ | |
850b2b42 | 2797 | if (nospares |
42543769 | 2798 | && (mddev->in_sync && mddev->recovery_cp == MaxSector) |
a8707c08 N |
2799 | && mddev->can_decrease_events |
2800 | && mddev->events != 1) { | |
42543769 | 2801 | mddev->events--; |
a8707c08 N |
2802 | mddev->can_decrease_events = 0; |
2803 | } else { | |
42543769 N |
2804 | /* otherwise we have to go forward and ... */ |
2805 | mddev->events ++; | |
a8707c08 | 2806 | mddev->can_decrease_events = nospares; |
42543769 | 2807 | } |
1da177e4 | 2808 | |
403df478 N |
2809 | /* |
2810 | * This 64-bit counter should never wrap. | |
2811 | * Either we are in around ~1 trillion A.C., assuming | |
2812 | * 1 reboot per second, or we have a bug... | |
2813 | */ | |
2814 | WARN_ON(mddev->events == 0); | |
2699b672 | 2815 | |
dafb20fa | 2816 | rdev_for_each(rdev, mddev) { |
2699b672 N |
2817 | if (rdev->badblocks.changed) |
2818 | any_badblocks_changed++; | |
de393cde N |
2819 | if (test_bit(Faulty, &rdev->flags)) |
2820 | set_bit(FaultRecorded, &rdev->flags); | |
2821 | } | |
2699b672 | 2822 | |
e691063a | 2823 | sync_sbs(mddev, nospares); |
85572d7c | 2824 | spin_unlock(&mddev->lock); |
1da177e4 | 2825 | |
36a4e1fe N |
2826 | pr_debug("md: updating %s RAID superblock on device (in sync %d)\n", |
2827 | mdname(mddev), mddev->in_sync); | |
1da177e4 | 2828 | |
504634f6 SL |
2829 | if (mddev->queue) |
2830 | blk_add_trace_msg(mddev->queue, "md md_update_sb"); | |
46533ff7 | 2831 | rewrite: |
e64e4018 | 2832 | md_bitmap_update_sb(mddev->bitmap); |
dafb20fa | 2833 | rdev_for_each(rdev, mddev) { |
1da177e4 | 2834 | char b[BDEVNAME_SIZE]; |
36a4e1fe | 2835 | |
42543769 N |
2836 | if (rdev->sb_loaded != 1) |
2837 | continue; /* no noise on spare devices */ | |
1da177e4 | 2838 | |
f466722c | 2839 | if (!test_bit(Faulty, &rdev->flags)) { |
7bfa19f2 | 2840 | md_super_write(mddev,rdev, |
0f420358 | 2841 | rdev->sb_start, rdev->sb_size, |
7bfa19f2 | 2842 | rdev->sb_page); |
36a4e1fe N |
2843 | pr_debug("md: (write) %s's sb offset: %llu\n", |
2844 | bdevname(rdev->bdev, b), | |
2845 | (unsigned long long)rdev->sb_start); | |
42543769 | 2846 | rdev->sb_events = mddev->events; |
2699b672 N |
2847 | if (rdev->badblocks.size) { |
2848 | md_super_write(mddev, rdev, | |
2849 | rdev->badblocks.sector, | |
2850 | rdev->badblocks.size << 9, | |
2851 | rdev->bb_page); | |
2852 | rdev->badblocks.size = 0; | |
2853 | } | |
7bfa19f2 | 2854 | |
f466722c | 2855 | } else |
36a4e1fe N |
2856 | pr_debug("md: %s (skipping faulty)\n", |
2857 | bdevname(rdev->bdev, b)); | |
d70ed2e4 | 2858 | |
7bfa19f2 | 2859 | if (mddev->level == LEVEL_MULTIPATH) |
1da177e4 LT |
2860 | /* only need to write one superblock... */ |
2861 | break; | |
2862 | } | |
46533ff7 N |
2863 | if (md_super_wait(mddev) < 0) |
2864 | goto rewrite; | |
2953079c | 2865 | /* if there was a failure, MD_SB_CHANGE_DEVS was set, and we re-write super */ |
7bfa19f2 | 2866 | |
2c97cf13 GJ |
2867 | if (mddev_is_clustered(mddev) && ret == 0) |
2868 | md_cluster_ops->metadata_update_finish(mddev); | |
2869 | ||
850b2b42 | 2870 | if (mddev->in_sync != sync_req || |
2953079c SL |
2871 | !bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2872 | BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_CLEAN))) | |
06d91a5f | 2873 | /* have to write it out again */ |
06d91a5f | 2874 | goto repeat; |
3d310eb7 | 2875 | wake_up(&mddev->sb_wait); |
acb180b0 | 2876 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
e1a86dbb | 2877 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
06d91a5f | 2878 | |
dafb20fa | 2879 | rdev_for_each(rdev, mddev) { |
de393cde N |
2880 | if (test_and_clear_bit(FaultRecorded, &rdev->flags)) |
2881 | clear_bit(Blocked, &rdev->flags); | |
2882 | ||
2883 | if (any_badblocks_changed) | |
fc974ee2 | 2884 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2885 | clear_bit(BlockedBadBlocks, &rdev->flags); |
2886 | wake_up(&rdev->blocked_wait); | |
2887 | } | |
1da177e4 | 2888 | } |
1aee41f6 | 2889 | EXPORT_SYMBOL(md_update_sb); |
1da177e4 | 2890 | |
a6da4ef8 GR |
2891 | static int add_bound_rdev(struct md_rdev *rdev) |
2892 | { | |
2893 | struct mddev *mddev = rdev->mddev; | |
2894 | int err = 0; | |
87d4d916 | 2895 | bool add_journal = test_bit(Journal, &rdev->flags); |
a6da4ef8 | 2896 | |
87d4d916 | 2897 | if (!mddev->pers->hot_remove_disk || add_journal) { |
a6da4ef8 GR |
2898 | /* If there is hot_add_disk but no hot_remove_disk |
2899 | * then added disks for geometry changes, | |
2900 | * and should be added immediately. | |
2901 | */ | |
2902 | super_types[mddev->major_version]. | |
2903 | validate_super(mddev, rdev); | |
87d4d916 SL |
2904 | if (add_journal) |
2905 | mddev_suspend(mddev); | |
a6da4ef8 | 2906 | err = mddev->pers->hot_add_disk(mddev, rdev); |
87d4d916 SL |
2907 | if (add_journal) |
2908 | mddev_resume(mddev); | |
a6da4ef8 | 2909 | if (err) { |
db767672 | 2910 | md_kick_rdev_from_array(rdev); |
a6da4ef8 GR |
2911 | return err; |
2912 | } | |
2913 | } | |
2914 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2915 | ||
2953079c | 2916 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a6da4ef8 GR |
2917 | if (mddev->degraded) |
2918 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
2919 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
2920 | md_new_event(mddev); | |
2921 | md_wakeup_thread(mddev->thread); | |
2922 | return 0; | |
2923 | } | |
1da177e4 | 2924 | |
7f6ce769 | 2925 | /* words written to sysfs files may, or may not, be \n terminated. |
bce74dac N |
2926 | * We want to accept with case. For this we use cmd_match. |
2927 | */ | |
2928 | static int cmd_match(const char *cmd, const char *str) | |
2929 | { | |
2930 | /* See if cmd, written into a sysfs file, matches | |
2931 | * str. They must either be the same, or cmd can | |
2932 | * have a trailing newline | |
2933 | */ | |
2934 | while (*cmd && *str && *cmd == *str) { | |
2935 | cmd++; | |
2936 | str++; | |
2937 | } | |
2938 | if (*cmd == '\n') | |
2939 | cmd++; | |
2940 | if (*str || *cmd) | |
2941 | return 0; | |
2942 | return 1; | |
2943 | } | |
2944 | ||
86e6ffdd N |
2945 | struct rdev_sysfs_entry { |
2946 | struct attribute attr; | |
3cb03002 N |
2947 | ssize_t (*show)(struct md_rdev *, char *); |
2948 | ssize_t (*store)(struct md_rdev *, const char *, size_t); | |
86e6ffdd N |
2949 | }; |
2950 | ||
2951 | static ssize_t | |
3cb03002 | 2952 | state_show(struct md_rdev *rdev, char *page) |
86e6ffdd | 2953 | { |
35b785f7 | 2954 | char *sep = ","; |
20a49ff6 | 2955 | size_t len = 0; |
6aa7de05 | 2956 | unsigned long flags = READ_ONCE(rdev->flags); |
86e6ffdd | 2957 | |
758bfc8a | 2958 | if (test_bit(Faulty, &flags) || |
dcbcb486 TM |
2959 | (!test_bit(ExternalBbl, &flags) && |
2960 | rdev->badblocks.unacked_exist)) | |
35b785f7 TM |
2961 | len += sprintf(page+len, "faulty%s", sep); |
2962 | if (test_bit(In_sync, &flags)) | |
2963 | len += sprintf(page+len, "in_sync%s", sep); | |
2964 | if (test_bit(Journal, &flags)) | |
2965 | len += sprintf(page+len, "journal%s", sep); | |
2966 | if (test_bit(WriteMostly, &flags)) | |
2967 | len += sprintf(page+len, "write_mostly%s", sep); | |
758bfc8a | 2968 | if (test_bit(Blocked, &flags) || |
52c64152 | 2969 | (rdev->badblocks.unacked_exist |
35b785f7 TM |
2970 | && !test_bit(Faulty, &flags))) |
2971 | len += sprintf(page+len, "blocked%s", sep); | |
758bfc8a | 2972 | if (!test_bit(Faulty, &flags) && |
f2076e7d | 2973 | !test_bit(Journal, &flags) && |
35b785f7 TM |
2974 | !test_bit(In_sync, &flags)) |
2975 | len += sprintf(page+len, "spare%s", sep); | |
2976 | if (test_bit(WriteErrorSeen, &flags)) | |
2977 | len += sprintf(page+len, "write_error%s", sep); | |
2978 | if (test_bit(WantReplacement, &flags)) | |
2979 | len += sprintf(page+len, "want_replacement%s", sep); | |
2980 | if (test_bit(Replacement, &flags)) | |
2981 | len += sprintf(page+len, "replacement%s", sep); | |
2982 | if (test_bit(ExternalBbl, &flags)) | |
2983 | len += sprintf(page+len, "external_bbl%s", sep); | |
688834e6 N |
2984 | if (test_bit(FailFast, &flags)) |
2985 | len += sprintf(page+len, "failfast%s", sep); | |
35b785f7 TM |
2986 | |
2987 | if (len) | |
2988 | len -= strlen(sep); | |
2d78f8c4 | 2989 | |
86e6ffdd N |
2990 | return len+sprintf(page+len, "\n"); |
2991 | } | |
2992 | ||
45dc2de1 | 2993 | static ssize_t |
3cb03002 | 2994 | state_store(struct md_rdev *rdev, const char *buf, size_t len) |
45dc2de1 N |
2995 | { |
2996 | /* can write | |
de393cde | 2997 | * faulty - simulates an error |
45dc2de1 | 2998 | * remove - disconnects the device |
f655675b N |
2999 | * writemostly - sets write_mostly |
3000 | * -writemostly - clears write_mostly | |
de393cde N |
3001 | * blocked - sets the Blocked flags |
3002 | * -blocked - clears the Blocked and possibly simulates an error | |
6d56e278 | 3003 | * insync - sets Insync providing device isn't active |
f466722c N |
3004 | * -insync - clear Insync for a device with a slot assigned, |
3005 | * so that it gets rebuilt based on bitmap | |
d7a9d443 N |
3006 | * write_error - sets WriteErrorSeen |
3007 | * -write_error - clears WriteErrorSeen | |
688834e6 | 3008 | * {,-}failfast - set/clear FailFast |
45dc2de1 N |
3009 | */ |
3010 | int err = -EINVAL; | |
3011 | if (cmd_match(buf, "faulty") && rdev->mddev->pers) { | |
3012 | md_error(rdev->mddev, rdev); | |
5ef56c8f N |
3013 | if (test_bit(Faulty, &rdev->flags)) |
3014 | err = 0; | |
3015 | else | |
3016 | err = -EBUSY; | |
45dc2de1 | 3017 | } else if (cmd_match(buf, "remove")) { |
5d881783 SL |
3018 | if (rdev->mddev->pers) { |
3019 | clear_bit(Blocked, &rdev->flags); | |
3020 | remove_and_add_spares(rdev->mddev, rdev); | |
3021 | } | |
45dc2de1 N |
3022 | if (rdev->raid_disk >= 0) |
3023 | err = -EBUSY; | |
3024 | else { | |
fd01b88c | 3025 | struct mddev *mddev = rdev->mddev; |
45dc2de1 | 3026 | err = 0; |
a9720903 GJ |
3027 | if (mddev_is_clustered(mddev)) |
3028 | err = md_cluster_ops->remove_disk(mddev, rdev); | |
3029 | ||
3030 | if (err == 0) { | |
3031 | md_kick_rdev_from_array(rdev); | |
060b0689 | 3032 | if (mddev->pers) { |
2953079c | 3033 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
3034 | md_wakeup_thread(mddev->thread); |
3035 | } | |
a9720903 GJ |
3036 | md_new_event(mddev); |
3037 | } | |
45dc2de1 | 3038 | } |
f655675b N |
3039 | } else if (cmd_match(buf, "writemostly")) { |
3040 | set_bit(WriteMostly, &rdev->flags); | |
404659cf | 3041 | mddev_create_serial_pool(rdev->mddev, rdev, false); |
f655675b N |
3042 | err = 0; |
3043 | } else if (cmd_match(buf, "-writemostly")) { | |
11d3a9f6 | 3044 | mddev_destroy_serial_pool(rdev->mddev, rdev, false); |
f655675b | 3045 | clear_bit(WriteMostly, &rdev->flags); |
6bfe0b49 DW |
3046 | err = 0; |
3047 | } else if (cmd_match(buf, "blocked")) { | |
3048 | set_bit(Blocked, &rdev->flags); | |
3049 | err = 0; | |
3050 | } else if (cmd_match(buf, "-blocked")) { | |
de393cde | 3051 | if (!test_bit(Faulty, &rdev->flags) && |
dcbcb486 | 3052 | !test_bit(ExternalBbl, &rdev->flags) && |
7da64a0a | 3053 | rdev->badblocks.unacked_exist) { |
de393cde N |
3054 | /* metadata handler doesn't understand badblocks, |
3055 | * so we need to fail the device | |
3056 | */ | |
3057 | md_error(rdev->mddev, rdev); | |
3058 | } | |
6bfe0b49 | 3059 | clear_bit(Blocked, &rdev->flags); |
de393cde | 3060 | clear_bit(BlockedBadBlocks, &rdev->flags); |
6bfe0b49 DW |
3061 | wake_up(&rdev->blocked_wait); |
3062 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
3063 | md_wakeup_thread(rdev->mddev->thread); | |
3064 | ||
6d56e278 N |
3065 | err = 0; |
3066 | } else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) { | |
3067 | set_bit(In_sync, &rdev->flags); | |
f655675b | 3068 | err = 0; |
688834e6 N |
3069 | } else if (cmd_match(buf, "failfast")) { |
3070 | set_bit(FailFast, &rdev->flags); | |
3071 | err = 0; | |
3072 | } else if (cmd_match(buf, "-failfast")) { | |
3073 | clear_bit(FailFast, &rdev->flags); | |
3074 | err = 0; | |
f2076e7d SL |
3075 | } else if (cmd_match(buf, "-insync") && rdev->raid_disk >= 0 && |
3076 | !test_bit(Journal, &rdev->flags)) { | |
e1960f8c N |
3077 | if (rdev->mddev->pers == NULL) { |
3078 | clear_bit(In_sync, &rdev->flags); | |
3079 | rdev->saved_raid_disk = rdev->raid_disk; | |
3080 | rdev->raid_disk = -1; | |
3081 | err = 0; | |
3082 | } | |
d7a9d443 N |
3083 | } else if (cmd_match(buf, "write_error")) { |
3084 | set_bit(WriteErrorSeen, &rdev->flags); | |
3085 | err = 0; | |
3086 | } else if (cmd_match(buf, "-write_error")) { | |
3087 | clear_bit(WriteErrorSeen, &rdev->flags); | |
3088 | err = 0; | |
2d78f8c4 N |
3089 | } else if (cmd_match(buf, "want_replacement")) { |
3090 | /* Any non-spare device that is not a replacement can | |
3091 | * become want_replacement at any time, but we then need to | |
3092 | * check if recovery is needed. | |
3093 | */ | |
3094 | if (rdev->raid_disk >= 0 && | |
f2076e7d | 3095 | !test_bit(Journal, &rdev->flags) && |
2d78f8c4 N |
3096 | !test_bit(Replacement, &rdev->flags)) |
3097 | set_bit(WantReplacement, &rdev->flags); | |
3098 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
3099 | md_wakeup_thread(rdev->mddev->thread); | |
3100 | err = 0; | |
3101 | } else if (cmd_match(buf, "-want_replacement")) { | |
3102 | /* Clearing 'want_replacement' is always allowed. | |
3103 | * Once replacements starts it is too late though. | |
3104 | */ | |
3105 | err = 0; | |
3106 | clear_bit(WantReplacement, &rdev->flags); | |
3107 | } else if (cmd_match(buf, "replacement")) { | |
3108 | /* Can only set a device as a replacement when array has not | |
3109 | * yet been started. Once running, replacement is automatic | |
3110 | * from spares, or by assigning 'slot'. | |
3111 | */ | |
3112 | if (rdev->mddev->pers) | |
3113 | err = -EBUSY; | |
3114 | else { | |
3115 | set_bit(Replacement, &rdev->flags); | |
3116 | err = 0; | |
3117 | } | |
3118 | } else if (cmd_match(buf, "-replacement")) { | |
3119 | /* Similarly, can only clear Replacement before start */ | |
3120 | if (rdev->mddev->pers) | |
3121 | err = -EBUSY; | |
3122 | else { | |
3123 | clear_bit(Replacement, &rdev->flags); | |
3124 | err = 0; | |
3125 | } | |
a6da4ef8 | 3126 | } else if (cmd_match(buf, "re-add")) { |
ee37e621 YY |
3127 | if (!rdev->mddev->pers) |
3128 | err = -EINVAL; | |
3129 | else if (test_bit(Faulty, &rdev->flags) && (rdev->raid_disk == -1) && | |
3130 | rdev->saved_raid_disk >= 0) { | |
97f6cd39 GR |
3131 | /* clear_bit is performed _after_ all the devices |
3132 | * have their local Faulty bit cleared. If any writes | |
3133 | * happen in the meantime in the local node, they | |
3134 | * will land in the local bitmap, which will be synced | |
3135 | * by this node eventually | |
3136 | */ | |
3137 | if (!mddev_is_clustered(rdev->mddev) || | |
3138 | (err = md_cluster_ops->gather_bitmaps(rdev)) == 0) { | |
3139 | clear_bit(Faulty, &rdev->flags); | |
3140 | err = add_bound_rdev(rdev); | |
3141 | } | |
a6da4ef8 GR |
3142 | } else |
3143 | err = -EBUSY; | |
35b785f7 TM |
3144 | } else if (cmd_match(buf, "external_bbl") && (rdev->mddev->external)) { |
3145 | set_bit(ExternalBbl, &rdev->flags); | |
3146 | rdev->badblocks.shift = 0; | |
3147 | err = 0; | |
3148 | } else if (cmd_match(buf, "-external_bbl") && (rdev->mddev->external)) { | |
3149 | clear_bit(ExternalBbl, &rdev->flags); | |
3150 | err = 0; | |
45dc2de1 | 3151 | } |
00bcb4ac N |
3152 | if (!err) |
3153 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
45dc2de1 N |
3154 | return err ? err : len; |
3155 | } | |
80ca3a44 | 3156 | static struct rdev_sysfs_entry rdev_state = |
750f199e | 3157 | __ATTR_PREALLOC(state, S_IRUGO|S_IWUSR, state_show, state_store); |
86e6ffdd | 3158 | |
4dbcdc75 | 3159 | static ssize_t |
3cb03002 | 3160 | errors_show(struct md_rdev *rdev, char *page) |
4dbcdc75 N |
3161 | { |
3162 | return sprintf(page, "%d\n", atomic_read(&rdev->corrected_errors)); | |
3163 | } | |
3164 | ||
3165 | static ssize_t | |
3cb03002 | 3166 | errors_store(struct md_rdev *rdev, const char *buf, size_t len) |
4dbcdc75 | 3167 | { |
4c9309c0 AD |
3168 | unsigned int n; |
3169 | int rv; | |
3170 | ||
3171 | rv = kstrtouint(buf, 10, &n); | |
3172 | if (rv < 0) | |
3173 | return rv; | |
3174 | atomic_set(&rdev->corrected_errors, n); | |
3175 | return len; | |
4dbcdc75 N |
3176 | } |
3177 | static struct rdev_sysfs_entry rdev_errors = | |
80ca3a44 | 3178 | __ATTR(errors, S_IRUGO|S_IWUSR, errors_show, errors_store); |
4dbcdc75 | 3179 | |
014236d2 | 3180 | static ssize_t |
3cb03002 | 3181 | slot_show(struct md_rdev *rdev, char *page) |
014236d2 | 3182 | { |
f2076e7d SL |
3183 | if (test_bit(Journal, &rdev->flags)) |
3184 | return sprintf(page, "journal\n"); | |
3185 | else if (rdev->raid_disk < 0) | |
014236d2 N |
3186 | return sprintf(page, "none\n"); |
3187 | else | |
3188 | return sprintf(page, "%d\n", rdev->raid_disk); | |
3189 | } | |
3190 | ||
3191 | static ssize_t | |
3cb03002 | 3192 | slot_store(struct md_rdev *rdev, const char *buf, size_t len) |
014236d2 | 3193 | { |
4c9309c0 | 3194 | int slot; |
c303da6d | 3195 | int err; |
4c9309c0 | 3196 | |
f2076e7d SL |
3197 | if (test_bit(Journal, &rdev->flags)) |
3198 | return -EBUSY; | |
014236d2 N |
3199 | if (strncmp(buf, "none", 4)==0) |
3200 | slot = -1; | |
4c9309c0 AD |
3201 | else { |
3202 | err = kstrtouint(buf, 10, (unsigned int *)&slot); | |
3203 | if (err < 0) | |
3204 | return err; | |
3205 | } | |
6c2fce2e | 3206 | if (rdev->mddev->pers && slot == -1) { |
c303da6d N |
3207 | /* Setting 'slot' on an active array requires also |
3208 | * updating the 'rd%d' link, and communicating | |
3209 | * with the personality with ->hot_*_disk. | |
3210 | * For now we only support removing | |
3211 | * failed/spare devices. This normally happens automatically, | |
3212 | * but not when the metadata is externally managed. | |
3213 | */ | |
c303da6d N |
3214 | if (rdev->raid_disk == -1) |
3215 | return -EEXIST; | |
3216 | /* personality does all needed checks */ | |
01393f3d | 3217 | if (rdev->mddev->pers->hot_remove_disk == NULL) |
c303da6d | 3218 | return -EINVAL; |
746d3207 N |
3219 | clear_bit(Blocked, &rdev->flags); |
3220 | remove_and_add_spares(rdev->mddev, rdev); | |
3221 | if (rdev->raid_disk >= 0) | |
3222 | return -EBUSY; | |
c303da6d N |
3223 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); |
3224 | md_wakeup_thread(rdev->mddev->thread); | |
6c2fce2e | 3225 | } else if (rdev->mddev->pers) { |
6c2fce2e | 3226 | /* Activating a spare .. or possibly reactivating |
6d56e278 | 3227 | * if we ever get bitmaps working here. |
6c2fce2e | 3228 | */ |
cb01c549 | 3229 | int err; |
6c2fce2e NB |
3230 | |
3231 | if (rdev->raid_disk != -1) | |
3232 | return -EBUSY; | |
3233 | ||
c6751b2b N |
3234 | if (test_bit(MD_RECOVERY_RUNNING, &rdev->mddev->recovery)) |
3235 | return -EBUSY; | |
3236 | ||
6c2fce2e NB |
3237 | if (rdev->mddev->pers->hot_add_disk == NULL) |
3238 | return -EINVAL; | |
3239 | ||
ba1b41b6 N |
3240 | if (slot >= rdev->mddev->raid_disks && |
3241 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
3242 | return -ENOSPC; | |
3243 | ||
6c2fce2e NB |
3244 | rdev->raid_disk = slot; |
3245 | if (test_bit(In_sync, &rdev->flags)) | |
3246 | rdev->saved_raid_disk = slot; | |
3247 | else | |
3248 | rdev->saved_raid_disk = -1; | |
d30519fc | 3249 | clear_bit(In_sync, &rdev->flags); |
8313b8e5 | 3250 | clear_bit(Bitmap_sync, &rdev->flags); |
3f79cc22 | 3251 | err = rdev->mddev->pers->hot_add_disk(rdev->mddev, rdev); |
cb01c549 GR |
3252 | if (err) { |
3253 | rdev->raid_disk = -1; | |
3254 | return err; | |
3255 | } else | |
3256 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
5e3b8a8d DLM |
3257 | /* failure here is OK */; |
3258 | sysfs_link_rdev(rdev->mddev, rdev); | |
6c2fce2e | 3259 | /* don't wakeup anyone, leave that to userspace. */ |
c303da6d | 3260 | } else { |
ba1b41b6 N |
3261 | if (slot >= rdev->mddev->raid_disks && |
3262 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
c303da6d N |
3263 | return -ENOSPC; |
3264 | rdev->raid_disk = slot; | |
3265 | /* assume it is working */ | |
c5d79adb N |
3266 | clear_bit(Faulty, &rdev->flags); |
3267 | clear_bit(WriteMostly, &rdev->flags); | |
c303da6d | 3268 | set_bit(In_sync, &rdev->flags); |
00bcb4ac | 3269 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
c303da6d | 3270 | } |
014236d2 N |
3271 | return len; |
3272 | } | |
3273 | ||
014236d2 | 3274 | static struct rdev_sysfs_entry rdev_slot = |
80ca3a44 | 3275 | __ATTR(slot, S_IRUGO|S_IWUSR, slot_show, slot_store); |
014236d2 | 3276 | |
93c8cad0 | 3277 | static ssize_t |
3cb03002 | 3278 | offset_show(struct md_rdev *rdev, char *page) |
93c8cad0 | 3279 | { |
6961ece4 | 3280 | return sprintf(page, "%llu\n", (unsigned long long)rdev->data_offset); |
93c8cad0 N |
3281 | } |
3282 | ||
3283 | static ssize_t | |
3cb03002 | 3284 | offset_store(struct md_rdev *rdev, const char *buf, size_t len) |
93c8cad0 | 3285 | { |
c6563a8c | 3286 | unsigned long long offset; |
b29bebd6 | 3287 | if (kstrtoull(buf, 10, &offset) < 0) |
93c8cad0 | 3288 | return -EINVAL; |
8ed0a521 | 3289 | if (rdev->mddev->pers && rdev->raid_disk >= 0) |
93c8cad0 | 3290 | return -EBUSY; |
dd8ac336 | 3291 | if (rdev->sectors && rdev->mddev->external) |
c5d79adb N |
3292 | /* Must set offset before size, so overlap checks |
3293 | * can be sane */ | |
3294 | return -EBUSY; | |
93c8cad0 | 3295 | rdev->data_offset = offset; |
25f7fd47 | 3296 | rdev->new_data_offset = offset; |
93c8cad0 N |
3297 | return len; |
3298 | } | |
3299 | ||
3300 | static struct rdev_sysfs_entry rdev_offset = | |
80ca3a44 | 3301 | __ATTR(offset, S_IRUGO|S_IWUSR, offset_show, offset_store); |
93c8cad0 | 3302 | |
c6563a8c N |
3303 | static ssize_t new_offset_show(struct md_rdev *rdev, char *page) |
3304 | { | |
3305 | return sprintf(page, "%llu\n", | |
3306 | (unsigned long long)rdev->new_data_offset); | |
3307 | } | |
3308 | ||
3309 | static ssize_t new_offset_store(struct md_rdev *rdev, | |
3310 | const char *buf, size_t len) | |
3311 | { | |
3312 | unsigned long long new_offset; | |
3313 | struct mddev *mddev = rdev->mddev; | |
3314 | ||
b29bebd6 | 3315 | if (kstrtoull(buf, 10, &new_offset) < 0) |
c6563a8c N |
3316 | return -EINVAL; |
3317 | ||
f851b60d N |
3318 | if (mddev->sync_thread || |
3319 | test_bit(MD_RECOVERY_RUNNING,&mddev->recovery)) | |
c6563a8c N |
3320 | return -EBUSY; |
3321 | if (new_offset == rdev->data_offset) | |
3322 | /* reset is always permitted */ | |
3323 | ; | |
3324 | else if (new_offset > rdev->data_offset) { | |
3325 | /* must not push array size beyond rdev_sectors */ | |
3326 | if (new_offset - rdev->data_offset | |
3327 | + mddev->dev_sectors > rdev->sectors) | |
3328 | return -E2BIG; | |
3329 | } | |
3330 | /* Metadata worries about other space details. */ | |
3331 | ||
3332 | /* decreasing the offset is inconsistent with a backwards | |
3333 | * reshape. | |
3334 | */ | |
3335 | if (new_offset < rdev->data_offset && | |
3336 | mddev->reshape_backwards) | |
3337 | return -EINVAL; | |
3338 | /* Increasing offset is inconsistent with forwards | |
3339 | * reshape. reshape_direction should be set to | |
3340 | * 'backwards' first. | |
3341 | */ | |
3342 | if (new_offset > rdev->data_offset && | |
3343 | !mddev->reshape_backwards) | |
3344 | return -EINVAL; | |
3345 | ||
3346 | if (mddev->pers && mddev->persistent && | |
3347 | !super_types[mddev->major_version] | |
3348 | .allow_new_offset(rdev, new_offset)) | |
3349 | return -E2BIG; | |
3350 | rdev->new_data_offset = new_offset; | |
3351 | if (new_offset > rdev->data_offset) | |
3352 | mddev->reshape_backwards = 1; | |
3353 | else if (new_offset < rdev->data_offset) | |
3354 | mddev->reshape_backwards = 0; | |
3355 | ||
3356 | return len; | |
3357 | } | |
3358 | static struct rdev_sysfs_entry rdev_new_offset = | |
3359 | __ATTR(new_offset, S_IRUGO|S_IWUSR, new_offset_show, new_offset_store); | |
3360 | ||
83303b61 | 3361 | static ssize_t |
3cb03002 | 3362 | rdev_size_show(struct md_rdev *rdev, char *page) |
83303b61 | 3363 | { |
dd8ac336 | 3364 | return sprintf(page, "%llu\n", (unsigned long long)rdev->sectors / 2); |
83303b61 N |
3365 | } |
3366 | ||
c5d79adb N |
3367 | static int overlaps(sector_t s1, sector_t l1, sector_t s2, sector_t l2) |
3368 | { | |
3369 | /* check if two start/length pairs overlap */ | |
3370 | if (s1+l1 <= s2) | |
3371 | return 0; | |
3372 | if (s2+l2 <= s1) | |
3373 | return 0; | |
3374 | return 1; | |
3375 | } | |
3376 | ||
b522adcd DW |
3377 | static int strict_blocks_to_sectors(const char *buf, sector_t *sectors) |
3378 | { | |
3379 | unsigned long long blocks; | |
3380 | sector_t new; | |
3381 | ||
b29bebd6 | 3382 | if (kstrtoull(buf, 10, &blocks) < 0) |
b522adcd DW |
3383 | return -EINVAL; |
3384 | ||
3385 | if (blocks & 1ULL << (8 * sizeof(blocks) - 1)) | |
3386 | return -EINVAL; /* sector conversion overflow */ | |
3387 | ||
3388 | new = blocks * 2; | |
3389 | if (new != blocks * 2) | |
3390 | return -EINVAL; /* unsigned long long to sector_t overflow */ | |
3391 | ||
3392 | *sectors = new; | |
3393 | return 0; | |
3394 | } | |
3395 | ||
83303b61 | 3396 | static ssize_t |
3cb03002 | 3397 | rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len) |
83303b61 | 3398 | { |
fd01b88c | 3399 | struct mddev *my_mddev = rdev->mddev; |
dd8ac336 | 3400 | sector_t oldsectors = rdev->sectors; |
b522adcd | 3401 | sector_t sectors; |
27c529bb | 3402 | |
f2076e7d SL |
3403 | if (test_bit(Journal, &rdev->flags)) |
3404 | return -EBUSY; | |
b522adcd | 3405 | if (strict_blocks_to_sectors(buf, §ors) < 0) |
d7027458 | 3406 | return -EINVAL; |
c6563a8c N |
3407 | if (rdev->data_offset != rdev->new_data_offset) |
3408 | return -EINVAL; /* too confusing */ | |
0cd17fec | 3409 | if (my_mddev->pers && rdev->raid_disk >= 0) { |
d7027458 | 3410 | if (my_mddev->persistent) { |
dd8ac336 AN |
3411 | sectors = super_types[my_mddev->major_version]. |
3412 | rdev_size_change(rdev, sectors); | |
3413 | if (!sectors) | |
0cd17fec | 3414 | return -EBUSY; |
dd8ac336 | 3415 | } else if (!sectors) |
77304d2a | 3416 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9) - |
dd8ac336 | 3417 | rdev->data_offset; |
a6468539 N |
3418 | if (!my_mddev->pers->resize) |
3419 | /* Cannot change size for RAID0 or Linear etc */ | |
3420 | return -EINVAL; | |
0cd17fec | 3421 | } |
dd8ac336 | 3422 | if (sectors < my_mddev->dev_sectors) |
7d3c6f87 | 3423 | return -EINVAL; /* component must fit device */ |
0cd17fec | 3424 | |
dd8ac336 AN |
3425 | rdev->sectors = sectors; |
3426 | if (sectors > oldsectors && my_mddev->external) { | |
8b1afc3d N |
3427 | /* Need to check that all other rdevs with the same |
3428 | * ->bdev do not overlap. 'rcu' is sufficient to walk | |
3429 | * the rdev lists safely. | |
3430 | * This check does not provide a hard guarantee, it | |
3431 | * just helps avoid dangerous mistakes. | |
c5d79adb | 3432 | */ |
fd01b88c | 3433 | struct mddev *mddev; |
c5d79adb | 3434 | int overlap = 0; |
159ec1fc | 3435 | struct list_head *tmp; |
c5d79adb | 3436 | |
8b1afc3d | 3437 | rcu_read_lock(); |
29ac4aa3 | 3438 | for_each_mddev(mddev, tmp) { |
3cb03002 | 3439 | struct md_rdev *rdev2; |
c5d79adb | 3440 | |
dafb20fa | 3441 | rdev_for_each(rdev2, mddev) |
f21e9ff7 N |
3442 | if (rdev->bdev == rdev2->bdev && |
3443 | rdev != rdev2 && | |
3444 | overlaps(rdev->data_offset, rdev->sectors, | |
3445 | rdev2->data_offset, | |
3446 | rdev2->sectors)) { | |
c5d79adb N |
3447 | overlap = 1; |
3448 | break; | |
3449 | } | |
c5d79adb N |
3450 | if (overlap) { |
3451 | mddev_put(mddev); | |
3452 | break; | |
3453 | } | |
3454 | } | |
8b1afc3d | 3455 | rcu_read_unlock(); |
c5d79adb N |
3456 | if (overlap) { |
3457 | /* Someone else could have slipped in a size | |
3458 | * change here, but doing so is just silly. | |
dd8ac336 | 3459 | * We put oldsectors back because we *know* it is |
c5d79adb N |
3460 | * safe, and trust userspace not to race with |
3461 | * itself | |
3462 | */ | |
dd8ac336 | 3463 | rdev->sectors = oldsectors; |
c5d79adb N |
3464 | return -EBUSY; |
3465 | } | |
3466 | } | |
83303b61 N |
3467 | return len; |
3468 | } | |
3469 | ||
3470 | static struct rdev_sysfs_entry rdev_size = | |
80ca3a44 | 3471 | __ATTR(size, S_IRUGO|S_IWUSR, rdev_size_show, rdev_size_store); |
83303b61 | 3472 | |
3cb03002 | 3473 | static ssize_t recovery_start_show(struct md_rdev *rdev, char *page) |
06e3c817 DW |
3474 | { |
3475 | unsigned long long recovery_start = rdev->recovery_offset; | |
3476 | ||
3477 | if (test_bit(In_sync, &rdev->flags) || | |
3478 | recovery_start == MaxSector) | |
3479 | return sprintf(page, "none\n"); | |
3480 | ||
3481 | return sprintf(page, "%llu\n", recovery_start); | |
3482 | } | |
3483 | ||
3cb03002 | 3484 | static ssize_t recovery_start_store(struct md_rdev *rdev, const char *buf, size_t len) |
06e3c817 DW |
3485 | { |
3486 | unsigned long long recovery_start; | |
3487 | ||
3488 | if (cmd_match(buf, "none")) | |
3489 | recovery_start = MaxSector; | |
b29bebd6 | 3490 | else if (kstrtoull(buf, 10, &recovery_start)) |
06e3c817 DW |
3491 | return -EINVAL; |
3492 | ||
3493 | if (rdev->mddev->pers && | |
3494 | rdev->raid_disk >= 0) | |
3495 | return -EBUSY; | |
3496 | ||
3497 | rdev->recovery_offset = recovery_start; | |
3498 | if (recovery_start == MaxSector) | |
3499 | set_bit(In_sync, &rdev->flags); | |
3500 | else | |
3501 | clear_bit(In_sync, &rdev->flags); | |
3502 | return len; | |
3503 | } | |
3504 | ||
3505 | static struct rdev_sysfs_entry rdev_recovery_start = | |
3506 | __ATTR(recovery_start, S_IRUGO|S_IWUSR, recovery_start_show, recovery_start_store); | |
3507 | ||
fc974ee2 VV |
3508 | /* sysfs access to bad-blocks list. |
3509 | * We present two files. | |
3510 | * 'bad-blocks' lists sector numbers and lengths of ranges that | |
3511 | * are recorded as bad. The list is truncated to fit within | |
3512 | * the one-page limit of sysfs. | |
3513 | * Writing "sector length" to this file adds an acknowledged | |
3514 | * bad block list. | |
3515 | * 'unacknowledged-bad-blocks' lists bad blocks that have not yet | |
3516 | * been acknowledged. Writing to this file adds bad blocks | |
3517 | * without acknowledging them. This is largely for testing. | |
3518 | */ | |
3cb03002 | 3519 | static ssize_t bb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3520 | { |
3521 | return badblocks_show(&rdev->badblocks, page, 0); | |
3522 | } | |
3cb03002 | 3523 | static ssize_t bb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 | 3524 | { |
de393cde N |
3525 | int rv = badblocks_store(&rdev->badblocks, page, len, 0); |
3526 | /* Maybe that ack was all we needed */ | |
3527 | if (test_and_clear_bit(BlockedBadBlocks, &rdev->flags)) | |
3528 | wake_up(&rdev->blocked_wait); | |
3529 | return rv; | |
16c791a5 N |
3530 | } |
3531 | static struct rdev_sysfs_entry rdev_bad_blocks = | |
3532 | __ATTR(bad_blocks, S_IRUGO|S_IWUSR, bb_show, bb_store); | |
3533 | ||
3cb03002 | 3534 | static ssize_t ubb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3535 | { |
3536 | return badblocks_show(&rdev->badblocks, page, 1); | |
3537 | } | |
3cb03002 | 3538 | static ssize_t ubb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 N |
3539 | { |
3540 | return badblocks_store(&rdev->badblocks, page, len, 1); | |
3541 | } | |
3542 | static struct rdev_sysfs_entry rdev_unack_bad_blocks = | |
3543 | __ATTR(unacknowledged_bad_blocks, S_IRUGO|S_IWUSR, ubb_show, ubb_store); | |
3544 | ||
664aed04 AP |
3545 | static ssize_t |
3546 | ppl_sector_show(struct md_rdev *rdev, char *page) | |
3547 | { | |
3548 | return sprintf(page, "%llu\n", (unsigned long long)rdev->ppl.sector); | |
3549 | } | |
3550 | ||
3551 | static ssize_t | |
3552 | ppl_sector_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3553 | { | |
3554 | unsigned long long sector; | |
3555 | ||
3556 | if (kstrtoull(buf, 10, §or) < 0) | |
3557 | return -EINVAL; | |
3558 | if (sector != (sector_t)sector) | |
3559 | return -EINVAL; | |
3560 | ||
3561 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3562 | rdev->raid_disk >= 0) | |
3563 | return -EBUSY; | |
3564 | ||
3565 | if (rdev->mddev->persistent) { | |
3566 | if (rdev->mddev->major_version == 0) | |
3567 | return -EINVAL; | |
3568 | if ((sector > rdev->sb_start && | |
3569 | sector - rdev->sb_start > S16_MAX) || | |
3570 | (sector < rdev->sb_start && | |
3571 | rdev->sb_start - sector > -S16_MIN)) | |
3572 | return -EINVAL; | |
3573 | rdev->ppl.offset = sector - rdev->sb_start; | |
3574 | } else if (!rdev->mddev->external) { | |
3575 | return -EBUSY; | |
3576 | } | |
3577 | rdev->ppl.sector = sector; | |
3578 | return len; | |
3579 | } | |
3580 | ||
3581 | static struct rdev_sysfs_entry rdev_ppl_sector = | |
3582 | __ATTR(ppl_sector, S_IRUGO|S_IWUSR, ppl_sector_show, ppl_sector_store); | |
3583 | ||
3584 | static ssize_t | |
3585 | ppl_size_show(struct md_rdev *rdev, char *page) | |
3586 | { | |
3587 | return sprintf(page, "%u\n", rdev->ppl.size); | |
3588 | } | |
3589 | ||
3590 | static ssize_t | |
3591 | ppl_size_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3592 | { | |
3593 | unsigned int size; | |
3594 | ||
3595 | if (kstrtouint(buf, 10, &size) < 0) | |
3596 | return -EINVAL; | |
3597 | ||
3598 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3599 | rdev->raid_disk >= 0) | |
3600 | return -EBUSY; | |
3601 | ||
3602 | if (rdev->mddev->persistent) { | |
3603 | if (rdev->mddev->major_version == 0) | |
3604 | return -EINVAL; | |
3605 | if (size > U16_MAX) | |
3606 | return -EINVAL; | |
3607 | } else if (!rdev->mddev->external) { | |
3608 | return -EBUSY; | |
3609 | } | |
3610 | rdev->ppl.size = size; | |
3611 | return len; | |
3612 | } | |
3613 | ||
3614 | static struct rdev_sysfs_entry rdev_ppl_size = | |
3615 | __ATTR(ppl_size, S_IRUGO|S_IWUSR, ppl_size_show, ppl_size_store); | |
3616 | ||
86e6ffdd N |
3617 | static struct attribute *rdev_default_attrs[] = { |
3618 | &rdev_state.attr, | |
4dbcdc75 | 3619 | &rdev_errors.attr, |
014236d2 | 3620 | &rdev_slot.attr, |
93c8cad0 | 3621 | &rdev_offset.attr, |
c6563a8c | 3622 | &rdev_new_offset.attr, |
83303b61 | 3623 | &rdev_size.attr, |
06e3c817 | 3624 | &rdev_recovery_start.attr, |
16c791a5 N |
3625 | &rdev_bad_blocks.attr, |
3626 | &rdev_unack_bad_blocks.attr, | |
664aed04 AP |
3627 | &rdev_ppl_sector.attr, |
3628 | &rdev_ppl_size.attr, | |
86e6ffdd N |
3629 | NULL, |
3630 | }; | |
3631 | static ssize_t | |
3632 | rdev_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
3633 | { | |
3634 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3635 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
86e6ffdd N |
3636 | |
3637 | if (!entry->show) | |
3638 | return -EIO; | |
758bfc8a | 3639 | if (!rdev->mddev) |
168b305b | 3640 | return -ENODEV; |
758bfc8a | 3641 | return entry->show(rdev, page); |
86e6ffdd N |
3642 | } |
3643 | ||
3644 | static ssize_t | |
3645 | rdev_attr_store(struct kobject *kobj, struct attribute *attr, | |
3646 | const char *page, size_t length) | |
3647 | { | |
3648 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3649 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
27c529bb | 3650 | ssize_t rv; |
fd01b88c | 3651 | struct mddev *mddev = rdev->mddev; |
86e6ffdd N |
3652 | |
3653 | if (!entry->store) | |
3654 | return -EIO; | |
67463acb N |
3655 | if (!capable(CAP_SYS_ADMIN)) |
3656 | return -EACCES; | |
c42d3240 | 3657 | rv = mddev ? mddev_lock(mddev) : -ENODEV; |
ca388059 | 3658 | if (!rv) { |
27c529bb | 3659 | if (rdev->mddev == NULL) |
c42d3240 | 3660 | rv = -ENODEV; |
27c529bb N |
3661 | else |
3662 | rv = entry->store(rdev, page, length); | |
6a51830e | 3663 | mddev_unlock(mddev); |
ca388059 N |
3664 | } |
3665 | return rv; | |
86e6ffdd N |
3666 | } |
3667 | ||
3668 | static void rdev_free(struct kobject *ko) | |
3669 | { | |
3cb03002 | 3670 | struct md_rdev *rdev = container_of(ko, struct md_rdev, kobj); |
86e6ffdd N |
3671 | kfree(rdev); |
3672 | } | |
52cf25d0 | 3673 | static const struct sysfs_ops rdev_sysfs_ops = { |
86e6ffdd N |
3674 | .show = rdev_attr_show, |
3675 | .store = rdev_attr_store, | |
3676 | }; | |
3677 | static struct kobj_type rdev_ktype = { | |
3678 | .release = rdev_free, | |
3679 | .sysfs_ops = &rdev_sysfs_ops, | |
3680 | .default_attrs = rdev_default_attrs, | |
3681 | }; | |
3682 | ||
3cb03002 | 3683 | int md_rdev_init(struct md_rdev *rdev) |
e8bb9a83 N |
3684 | { |
3685 | rdev->desc_nr = -1; | |
3686 | rdev->saved_raid_disk = -1; | |
3687 | rdev->raid_disk = -1; | |
3688 | rdev->flags = 0; | |
3689 | rdev->data_offset = 0; | |
c6563a8c | 3690 | rdev->new_data_offset = 0; |
e8bb9a83 | 3691 | rdev->sb_events = 0; |
0e3ef49e | 3692 | rdev->last_read_error = 0; |
2699b672 N |
3693 | rdev->sb_loaded = 0; |
3694 | rdev->bb_page = NULL; | |
e8bb9a83 N |
3695 | atomic_set(&rdev->nr_pending, 0); |
3696 | atomic_set(&rdev->read_errors, 0); | |
3697 | atomic_set(&rdev->corrected_errors, 0); | |
3698 | ||
3699 | INIT_LIST_HEAD(&rdev->same_set); | |
3700 | init_waitqueue_head(&rdev->blocked_wait); | |
2230dfe4 N |
3701 | |
3702 | /* Add space to store bad block list. | |
3703 | * This reserves the space even on arrays where it cannot | |
3704 | * be used - I wonder if that matters | |
3705 | */ | |
fc974ee2 | 3706 | return badblocks_init(&rdev->badblocks, 0); |
e8bb9a83 N |
3707 | } |
3708 | EXPORT_SYMBOL_GPL(md_rdev_init); | |
1da177e4 LT |
3709 | /* |
3710 | * Import a device. If 'super_format' >= 0, then sanity check the superblock | |
3711 | * | |
3712 | * mark the device faulty if: | |
3713 | * | |
3714 | * - the device is nonexistent (zero size) | |
3715 | * - the device has no valid superblock | |
3716 | * | |
3717 | * a faulty rdev _never_ has rdev->sb set. | |
3718 | */ | |
3cb03002 | 3719 | static struct md_rdev *md_import_device(dev_t newdev, int super_format, int super_minor) |
1da177e4 LT |
3720 | { |
3721 | char b[BDEVNAME_SIZE]; | |
3722 | int err; | |
3cb03002 | 3723 | struct md_rdev *rdev; |
1da177e4 LT |
3724 | sector_t size; |
3725 | ||
9ffae0cf | 3726 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
9d48739e | 3727 | if (!rdev) |
1da177e4 | 3728 | return ERR_PTR(-ENOMEM); |
1da177e4 | 3729 | |
2230dfe4 N |
3730 | err = md_rdev_init(rdev); |
3731 | if (err) | |
3732 | goto abort_free; | |
3733 | err = alloc_disk_sb(rdev); | |
3734 | if (err) | |
1da177e4 LT |
3735 | goto abort_free; |
3736 | ||
c5d79adb | 3737 | err = lock_rdev(rdev, newdev, super_format == -2); |
1da177e4 LT |
3738 | if (err) |
3739 | goto abort_free; | |
3740 | ||
f9cb074b | 3741 | kobject_init(&rdev->kobj, &rdev_ktype); |
86e6ffdd | 3742 | |
77304d2a | 3743 | size = i_size_read(rdev->bdev->bd_inode) >> BLOCK_SIZE_BITS; |
1da177e4 | 3744 | if (!size) { |
9d48739e | 3745 | pr_warn("md: %s has zero or unknown size, marking faulty!\n", |
1da177e4 LT |
3746 | bdevname(rdev->bdev,b)); |
3747 | err = -EINVAL; | |
3748 | goto abort_free; | |
3749 | } | |
3750 | ||
3751 | if (super_format >= 0) { | |
3752 | err = super_types[super_format]. | |
3753 | load_super(rdev, NULL, super_minor); | |
3754 | if (err == -EINVAL) { | |
9d48739e | 3755 | pr_warn("md: %s does not have a valid v%d.%d superblock, not importing!\n", |
df968c4e | 3756 | bdevname(rdev->bdev,b), |
9d48739e | 3757 | super_format, super_minor); |
1da177e4 LT |
3758 | goto abort_free; |
3759 | } | |
3760 | if (err < 0) { | |
9d48739e | 3761 | pr_warn("md: could not read %s's sb, not importing!\n", |
1da177e4 LT |
3762 | bdevname(rdev->bdev,b)); |
3763 | goto abort_free; | |
3764 | } | |
3765 | } | |
6bfe0b49 | 3766 | |
1da177e4 LT |
3767 | return rdev; |
3768 | ||
3769 | abort_free: | |
2699b672 N |
3770 | if (rdev->bdev) |
3771 | unlock_rdev(rdev); | |
545c8795 | 3772 | md_rdev_clear(rdev); |
1da177e4 LT |
3773 | kfree(rdev); |
3774 | return ERR_PTR(err); | |
3775 | } | |
3776 | ||
3777 | /* | |
3778 | * Check a full RAID array for plausibility | |
3779 | */ | |
3780 | ||
6a5cb53a | 3781 | static int analyze_sbs(struct mddev *mddev) |
1da177e4 LT |
3782 | { |
3783 | int i; | |
3cb03002 | 3784 | struct md_rdev *rdev, *freshest, *tmp; |
1da177e4 LT |
3785 | char b[BDEVNAME_SIZE]; |
3786 | ||
3787 | freshest = NULL; | |
dafb20fa | 3788 | rdev_for_each_safe(rdev, tmp, mddev) |
1da177e4 LT |
3789 | switch (super_types[mddev->major_version]. |
3790 | load_super(rdev, freshest, mddev->minor_version)) { | |
3791 | case 1: | |
3792 | freshest = rdev; | |
3793 | break; | |
3794 | case 0: | |
3795 | break; | |
3796 | default: | |
9d48739e | 3797 | pr_warn("md: fatal superblock inconsistency in %s -- removing from array\n", |
1da177e4 | 3798 | bdevname(rdev->bdev,b)); |
fb56dfef | 3799 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3800 | } |
3801 | ||
6a5cb53a YY |
3802 | /* Cannot find a valid fresh disk */ |
3803 | if (!freshest) { | |
3804 | pr_warn("md: cannot find a valid disk\n"); | |
3805 | return -EINVAL; | |
3806 | } | |
3807 | ||
1da177e4 LT |
3808 | super_types[mddev->major_version]. |
3809 | validate_super(mddev, freshest); | |
3810 | ||
3811 | i = 0; | |
dafb20fa | 3812 | rdev_for_each_safe(rdev, tmp, mddev) { |
233fca36 N |
3813 | if (mddev->max_disks && |
3814 | (rdev->desc_nr >= mddev->max_disks || | |
3815 | i > mddev->max_disks)) { | |
9d48739e N |
3816 | pr_warn("md: %s: %s: only %d devices permitted\n", |
3817 | mdname(mddev), bdevname(rdev->bdev, b), | |
3818 | mddev->max_disks); | |
fb56dfef | 3819 | md_kick_rdev_from_array(rdev); |
de01dfad N |
3820 | continue; |
3821 | } | |
1aee41f6 | 3822 | if (rdev != freshest) { |
1da177e4 LT |
3823 | if (super_types[mddev->major_version]. |
3824 | validate_super(mddev, rdev)) { | |
9d48739e | 3825 | pr_warn("md: kicking non-fresh %s from array!\n", |
1da177e4 | 3826 | bdevname(rdev->bdev,b)); |
fb56dfef | 3827 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3828 | continue; |
3829 | } | |
1aee41f6 | 3830 | } |
1da177e4 LT |
3831 | if (mddev->level == LEVEL_MULTIPATH) { |
3832 | rdev->desc_nr = i++; | |
3833 | rdev->raid_disk = rdev->desc_nr; | |
b2d444d7 | 3834 | set_bit(In_sync, &rdev->flags); |
f2076e7d SL |
3835 | } else if (rdev->raid_disk >= |
3836 | (mddev->raid_disks - min(0, mddev->delta_disks)) && | |
3837 | !test_bit(Journal, &rdev->flags)) { | |
a778b73f N |
3838 | rdev->raid_disk = -1; |
3839 | clear_bit(In_sync, &rdev->flags); | |
1da177e4 LT |
3840 | } |
3841 | } | |
6a5cb53a YY |
3842 | |
3843 | return 0; | |
1da177e4 LT |
3844 | } |
3845 | ||
72e02075 N |
3846 | /* Read a fixed-point number. |
3847 | * Numbers in sysfs attributes should be in "standard" units where | |
3848 | * possible, so time should be in seconds. | |
f72ffdd6 | 3849 | * However we internally use a a much smaller unit such as |
72e02075 N |
3850 | * milliseconds or jiffies. |
3851 | * This function takes a decimal number with a possible fractional | |
3852 | * component, and produces an integer which is the result of | |
3853 | * multiplying that number by 10^'scale'. | |
3854 | * all without any floating-point arithmetic. | |
3855 | */ | |
3856 | int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale) | |
3857 | { | |
3858 | unsigned long result = 0; | |
3859 | long decimals = -1; | |
3860 | while (isdigit(*cp) || (*cp == '.' && decimals < 0)) { | |
3861 | if (*cp == '.') | |
3862 | decimals = 0; | |
3863 | else if (decimals < scale) { | |
3864 | unsigned int value; | |
3865 | value = *cp - '0'; | |
3866 | result = result * 10 + value; | |
3867 | if (decimals >= 0) | |
3868 | decimals++; | |
3869 | } | |
3870 | cp++; | |
3871 | } | |
3872 | if (*cp == '\n') | |
3873 | cp++; | |
3874 | if (*cp) | |
3875 | return -EINVAL; | |
3876 | if (decimals < 0) | |
3877 | decimals = 0; | |
cf891607 | 3878 | *res = result * int_pow(10, scale - decimals); |
72e02075 N |
3879 | return 0; |
3880 | } | |
3881 | ||
16f17b39 | 3882 | static ssize_t |
fd01b88c | 3883 | safe_delay_show(struct mddev *mddev, char *page) |
16f17b39 N |
3884 | { |
3885 | int msec = (mddev->safemode_delay*1000)/HZ; | |
3886 | return sprintf(page, "%d.%03d\n", msec/1000, msec%1000); | |
3887 | } | |
3888 | static ssize_t | |
fd01b88c | 3889 | safe_delay_store(struct mddev *mddev, const char *cbuf, size_t len) |
16f17b39 | 3890 | { |
16f17b39 | 3891 | unsigned long msec; |
97ce0a7f | 3892 | |
28c1b9fd | 3893 | if (mddev_is_clustered(mddev)) { |
9d48739e | 3894 | pr_warn("md: Safemode is disabled for clustered mode\n"); |
28c1b9fd GR |
3895 | return -EINVAL; |
3896 | } | |
3897 | ||
72e02075 | 3898 | if (strict_strtoul_scaled(cbuf, &msec, 3) < 0) |
16f17b39 | 3899 | return -EINVAL; |
16f17b39 N |
3900 | if (msec == 0) |
3901 | mddev->safemode_delay = 0; | |
3902 | else { | |
19052c0e | 3903 | unsigned long old_delay = mddev->safemode_delay; |
1b30e66f N |
3904 | unsigned long new_delay = (msec*HZ)/1000; |
3905 | ||
3906 | if (new_delay == 0) | |
3907 | new_delay = 1; | |
3908 | mddev->safemode_delay = new_delay; | |
3909 | if (new_delay < old_delay || old_delay == 0) | |
3910 | mod_timer(&mddev->safemode_timer, jiffies+1); | |
16f17b39 N |
3911 | } |
3912 | return len; | |
3913 | } | |
3914 | static struct md_sysfs_entry md_safe_delay = | |
80ca3a44 | 3915 | __ATTR(safe_mode_delay, S_IRUGO|S_IWUSR,safe_delay_show, safe_delay_store); |
16f17b39 | 3916 | |
eae1701f | 3917 | static ssize_t |
fd01b88c | 3918 | level_show(struct mddev *mddev, char *page) |
eae1701f | 3919 | { |
36d091f4 N |
3920 | struct md_personality *p; |
3921 | int ret; | |
3922 | spin_lock(&mddev->lock); | |
3923 | p = mddev->pers; | |
d9d166c2 | 3924 | if (p) |
36d091f4 | 3925 | ret = sprintf(page, "%s\n", p->name); |
d9d166c2 | 3926 | else if (mddev->clevel[0]) |
36d091f4 | 3927 | ret = sprintf(page, "%s\n", mddev->clevel); |
d9d166c2 | 3928 | else if (mddev->level != LEVEL_NONE) |
36d091f4 | 3929 | ret = sprintf(page, "%d\n", mddev->level); |
d9d166c2 | 3930 | else |
36d091f4 N |
3931 | ret = 0; |
3932 | spin_unlock(&mddev->lock); | |
3933 | return ret; | |
eae1701f N |
3934 | } |
3935 | ||
d9d166c2 | 3936 | static ssize_t |
fd01b88c | 3937 | level_store(struct mddev *mddev, const char *buf, size_t len) |
d9d166c2 | 3938 | { |
f2859af6 | 3939 | char clevel[16]; |
6791875e N |
3940 | ssize_t rv; |
3941 | size_t slen = len; | |
db721d32 | 3942 | struct md_personality *pers, *oldpers; |
f2859af6 | 3943 | long level; |
db721d32 | 3944 | void *priv, *oldpriv; |
3cb03002 | 3945 | struct md_rdev *rdev; |
245f46c2 | 3946 | |
6791875e N |
3947 | if (slen == 0 || slen >= sizeof(clevel)) |
3948 | return -EINVAL; | |
3949 | ||
3950 | rv = mddev_lock(mddev); | |
3951 | if (rv) | |
3952 | return rv; | |
3953 | ||
245f46c2 | 3954 | if (mddev->pers == NULL) { |
6791875e N |
3955 | strncpy(mddev->clevel, buf, slen); |
3956 | if (mddev->clevel[slen-1] == '\n') | |
3957 | slen--; | |
3958 | mddev->clevel[slen] = 0; | |
245f46c2 | 3959 | mddev->level = LEVEL_NONE; |
6791875e N |
3960 | rv = len; |
3961 | goto out_unlock; | |
245f46c2 | 3962 | } |
6791875e | 3963 | rv = -EROFS; |
bd8839e0 | 3964 | if (mddev->ro) |
6791875e | 3965 | goto out_unlock; |
245f46c2 N |
3966 | |
3967 | /* request to change the personality. Need to ensure: | |
3968 | * - array is not engaged in resync/recovery/reshape | |
3969 | * - old personality can be suspended | |
3970 | * - new personality will access other array. | |
3971 | */ | |
3972 | ||
6791875e | 3973 | rv = -EBUSY; |
bb4f1e9d | 3974 | if (mddev->sync_thread || |
f851b60d | 3975 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
bb4f1e9d N |
3976 | mddev->reshape_position != MaxSector || |
3977 | mddev->sysfs_active) | |
6791875e | 3978 | goto out_unlock; |
245f46c2 | 3979 | |
6791875e | 3980 | rv = -EINVAL; |
245f46c2 | 3981 | if (!mddev->pers->quiesce) { |
9d48739e N |
3982 | pr_warn("md: %s: %s does not support online personality change\n", |
3983 | mdname(mddev), mddev->pers->name); | |
6791875e | 3984 | goto out_unlock; |
245f46c2 N |
3985 | } |
3986 | ||
3987 | /* Now find the new personality */ | |
6791875e N |
3988 | strncpy(clevel, buf, slen); |
3989 | if (clevel[slen-1] == '\n') | |
3990 | slen--; | |
3991 | clevel[slen] = 0; | |
b29bebd6 | 3992 | if (kstrtol(clevel, 10, &level)) |
f2859af6 | 3993 | level = LEVEL_NONE; |
245f46c2 | 3994 | |
f2859af6 DW |
3995 | if (request_module("md-%s", clevel) != 0) |
3996 | request_module("md-level-%s", clevel); | |
245f46c2 | 3997 | spin_lock(&pers_lock); |
f2859af6 | 3998 | pers = find_pers(level, clevel); |
245f46c2 N |
3999 | if (!pers || !try_module_get(pers->owner)) { |
4000 | spin_unlock(&pers_lock); | |
9d48739e | 4001 | pr_warn("md: personality %s not loaded\n", clevel); |
6791875e N |
4002 | rv = -EINVAL; |
4003 | goto out_unlock; | |
245f46c2 N |
4004 | } |
4005 | spin_unlock(&pers_lock); | |
4006 | ||
4007 | if (pers == mddev->pers) { | |
4008 | /* Nothing to do! */ | |
4009 | module_put(pers->owner); | |
6791875e N |
4010 | rv = len; |
4011 | goto out_unlock; | |
245f46c2 N |
4012 | } |
4013 | if (!pers->takeover) { | |
4014 | module_put(pers->owner); | |
9d48739e N |
4015 | pr_warn("md: %s: %s does not support personality takeover\n", |
4016 | mdname(mddev), clevel); | |
6791875e N |
4017 | rv = -EINVAL; |
4018 | goto out_unlock; | |
245f46c2 N |
4019 | } |
4020 | ||
dafb20fa | 4021 | rdev_for_each(rdev, mddev) |
e93f68a1 N |
4022 | rdev->new_raid_disk = rdev->raid_disk; |
4023 | ||
245f46c2 N |
4024 | /* ->takeover must set new_* and/or delta_disks |
4025 | * if it succeeds, and may set them when it fails. | |
4026 | */ | |
4027 | priv = pers->takeover(mddev); | |
4028 | if (IS_ERR(priv)) { | |
4029 | mddev->new_level = mddev->level; | |
4030 | mddev->new_layout = mddev->layout; | |
664e7c41 | 4031 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
245f46c2 N |
4032 | mddev->raid_disks -= mddev->delta_disks; |
4033 | mddev->delta_disks = 0; | |
2c810cdd | 4034 | mddev->reshape_backwards = 0; |
245f46c2 | 4035 | module_put(pers->owner); |
9d48739e N |
4036 | pr_warn("md: %s: %s would not accept array\n", |
4037 | mdname(mddev), clevel); | |
6791875e N |
4038 | rv = PTR_ERR(priv); |
4039 | goto out_unlock; | |
245f46c2 N |
4040 | } |
4041 | ||
4042 | /* Looks like we have a winner */ | |
4043 | mddev_suspend(mddev); | |
5aa61f42 | 4044 | mddev_detach(mddev); |
36d091f4 N |
4045 | |
4046 | spin_lock(&mddev->lock); | |
db721d32 N |
4047 | oldpers = mddev->pers; |
4048 | oldpriv = mddev->private; | |
4049 | mddev->pers = pers; | |
4050 | mddev->private = priv; | |
4051 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); | |
4052 | mddev->level = mddev->new_level; | |
4053 | mddev->layout = mddev->new_layout; | |
4054 | mddev->chunk_sectors = mddev->new_chunk_sectors; | |
4055 | mddev->delta_disks = 0; | |
4056 | mddev->reshape_backwards = 0; | |
4057 | mddev->degraded = 0; | |
36d091f4 | 4058 | spin_unlock(&mddev->lock); |
db721d32 N |
4059 | |
4060 | if (oldpers->sync_request == NULL && | |
4061 | mddev->external) { | |
4062 | /* We are converting from a no-redundancy array | |
4063 | * to a redundancy array and metadata is managed | |
4064 | * externally so we need to be sure that writes | |
4065 | * won't block due to a need to transition | |
4066 | * clean->dirty | |
4067 | * until external management is started. | |
4068 | */ | |
4069 | mddev->in_sync = 0; | |
4070 | mddev->safemode_delay = 0; | |
4071 | mddev->safemode = 0; | |
4072 | } | |
f72ffdd6 | 4073 | |
db721d32 N |
4074 | oldpers->free(mddev, oldpriv); |
4075 | ||
4076 | if (oldpers->sync_request == NULL && | |
a64c876f N |
4077 | pers->sync_request != NULL) { |
4078 | /* need to add the md_redundancy_group */ | |
4079 | if (sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
4080 | pr_warn("md: cannot register extra attributes for %s\n", |
4081 | mdname(mddev)); | |
388975cc | 4082 | mddev->sysfs_action = sysfs_get_dirent(mddev->kobj.sd, "sync_action"); |
e8efa9b8 JB |
4083 | mddev->sysfs_completed = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_completed"); |
4084 | mddev->sysfs_degraded = sysfs_get_dirent_safe(mddev->kobj.sd, "degraded"); | |
f72ffdd6 | 4085 | } |
db721d32 | 4086 | if (oldpers->sync_request != NULL && |
a64c876f N |
4087 | pers->sync_request == NULL) { |
4088 | /* need to remove the md_redundancy_group */ | |
4089 | if (mddev->to_remove == NULL) | |
4090 | mddev->to_remove = &md_redundancy_group; | |
4091 | } | |
4092 | ||
4cb9da7d AO |
4093 | module_put(oldpers->owner); |
4094 | ||
dafb20fa | 4095 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
4096 | if (rdev->raid_disk < 0) |
4097 | continue; | |
bf2cb0da | 4098 | if (rdev->new_raid_disk >= mddev->raid_disks) |
e93f68a1 N |
4099 | rdev->new_raid_disk = -1; |
4100 | if (rdev->new_raid_disk == rdev->raid_disk) | |
4101 | continue; | |
36fad858 | 4102 | sysfs_unlink_rdev(mddev, rdev); |
e93f68a1 | 4103 | } |
dafb20fa | 4104 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
4105 | if (rdev->raid_disk < 0) |
4106 | continue; | |
4107 | if (rdev->new_raid_disk == rdev->raid_disk) | |
4108 | continue; | |
4109 | rdev->raid_disk = rdev->new_raid_disk; | |
4110 | if (rdev->raid_disk < 0) | |
3a981b03 | 4111 | clear_bit(In_sync, &rdev->flags); |
e93f68a1 | 4112 | else { |
36fad858 | 4113 | if (sysfs_link_rdev(mddev, rdev)) |
9d48739e N |
4114 | pr_warn("md: cannot register rd%d for %s after level change\n", |
4115 | rdev->raid_disk, mdname(mddev)); | |
3a981b03 | 4116 | } |
e93f68a1 N |
4117 | } |
4118 | ||
db721d32 | 4119 | if (pers->sync_request == NULL) { |
9af204cf TM |
4120 | /* this is now an array without redundancy, so |
4121 | * it must always be in_sync | |
4122 | */ | |
4123 | mddev->in_sync = 1; | |
4124 | del_timer_sync(&mddev->safemode_timer); | |
4125 | } | |
02e5f5c0 | 4126 | blk_set_stacking_limits(&mddev->queue->limits); |
245f46c2 | 4127 | pers->run(mddev); |
2953079c | 4128 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
47525e59 | 4129 | mddev_resume(mddev); |
830778a1 N |
4130 | if (!mddev->thread) |
4131 | md_update_sb(mddev, 1); | |
e1a86dbb | 4132 | sysfs_notify_dirent_safe(mddev->sysfs_level); |
bb7f8d22 | 4133 | md_new_event(mddev); |
6791875e N |
4134 | rv = len; |
4135 | out_unlock: | |
4136 | mddev_unlock(mddev); | |
d9d166c2 N |
4137 | return rv; |
4138 | } | |
4139 | ||
4140 | static struct md_sysfs_entry md_level = | |
80ca3a44 | 4141 | __ATTR(level, S_IRUGO|S_IWUSR, level_show, level_store); |
eae1701f | 4142 | |
d4dbd025 | 4143 | static ssize_t |
fd01b88c | 4144 | layout_show(struct mddev *mddev, char *page) |
d4dbd025 N |
4145 | { |
4146 | /* just a number, not meaningful for all levels */ | |
08a02ecd N |
4147 | if (mddev->reshape_position != MaxSector && |
4148 | mddev->layout != mddev->new_layout) | |
4149 | return sprintf(page, "%d (%d)\n", | |
4150 | mddev->new_layout, mddev->layout); | |
d4dbd025 N |
4151 | return sprintf(page, "%d\n", mddev->layout); |
4152 | } | |
4153 | ||
4154 | static ssize_t | |
fd01b88c | 4155 | layout_store(struct mddev *mddev, const char *buf, size_t len) |
d4dbd025 | 4156 | { |
4c9309c0 | 4157 | unsigned int n; |
6791875e | 4158 | int err; |
d4dbd025 | 4159 | |
4c9309c0 AD |
4160 | err = kstrtouint(buf, 10, &n); |
4161 | if (err < 0) | |
4162 | return err; | |
6791875e N |
4163 | err = mddev_lock(mddev); |
4164 | if (err) | |
4165 | return err; | |
d4dbd025 | 4166 | |
b3546035 | 4167 | if (mddev->pers) { |
50ac168a | 4168 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
4169 | err = -EBUSY; |
4170 | else if (mddev->ro) | |
4171 | err = -EROFS; | |
4172 | else { | |
4173 | mddev->new_layout = n; | |
4174 | err = mddev->pers->check_reshape(mddev); | |
4175 | if (err) | |
4176 | mddev->new_layout = mddev->layout; | |
597a711b | 4177 | } |
b3546035 | 4178 | } else { |
08a02ecd | 4179 | mddev->new_layout = n; |
b3546035 N |
4180 | if (mddev->reshape_position == MaxSector) |
4181 | mddev->layout = n; | |
4182 | } | |
6791875e N |
4183 | mddev_unlock(mddev); |
4184 | return err ?: len; | |
d4dbd025 N |
4185 | } |
4186 | static struct md_sysfs_entry md_layout = | |
80ca3a44 | 4187 | __ATTR(layout, S_IRUGO|S_IWUSR, layout_show, layout_store); |
d4dbd025 | 4188 | |
eae1701f | 4189 | static ssize_t |
fd01b88c | 4190 | raid_disks_show(struct mddev *mddev, char *page) |
eae1701f | 4191 | { |
bb636547 N |
4192 | if (mddev->raid_disks == 0) |
4193 | return 0; | |
08a02ecd N |
4194 | if (mddev->reshape_position != MaxSector && |
4195 | mddev->delta_disks != 0) | |
4196 | return sprintf(page, "%d (%d)\n", mddev->raid_disks, | |
4197 | mddev->raid_disks - mddev->delta_disks); | |
eae1701f N |
4198 | return sprintf(page, "%d\n", mddev->raid_disks); |
4199 | } | |
4200 | ||
fd01b88c | 4201 | static int update_raid_disks(struct mddev *mddev, int raid_disks); |
da943b99 N |
4202 | |
4203 | static ssize_t | |
fd01b88c | 4204 | raid_disks_store(struct mddev *mddev, const char *buf, size_t len) |
da943b99 | 4205 | { |
4c9309c0 | 4206 | unsigned int n; |
6791875e | 4207 | int err; |
da943b99 | 4208 | |
4c9309c0 AD |
4209 | err = kstrtouint(buf, 10, &n); |
4210 | if (err < 0) | |
4211 | return err; | |
da943b99 | 4212 | |
6791875e N |
4213 | err = mddev_lock(mddev); |
4214 | if (err) | |
4215 | return err; | |
da943b99 | 4216 | if (mddev->pers) |
6791875e | 4217 | err = update_raid_disks(mddev, n); |
08a02ecd | 4218 | else if (mddev->reshape_position != MaxSector) { |
c6563a8c | 4219 | struct md_rdev *rdev; |
08a02ecd | 4220 | int olddisks = mddev->raid_disks - mddev->delta_disks; |
c6563a8c | 4221 | |
6791875e | 4222 | err = -EINVAL; |
c6563a8c N |
4223 | rdev_for_each(rdev, mddev) { |
4224 | if (olddisks < n && | |
4225 | rdev->data_offset < rdev->new_data_offset) | |
6791875e | 4226 | goto out_unlock; |
c6563a8c N |
4227 | if (olddisks > n && |
4228 | rdev->data_offset > rdev->new_data_offset) | |
6791875e | 4229 | goto out_unlock; |
c6563a8c | 4230 | } |
6791875e | 4231 | err = 0; |
08a02ecd N |
4232 | mddev->delta_disks = n - olddisks; |
4233 | mddev->raid_disks = n; | |
2c810cdd | 4234 | mddev->reshape_backwards = (mddev->delta_disks < 0); |
08a02ecd | 4235 | } else |
da943b99 | 4236 | mddev->raid_disks = n; |
6791875e N |
4237 | out_unlock: |
4238 | mddev_unlock(mddev); | |
4239 | return err ? err : len; | |
da943b99 N |
4240 | } |
4241 | static struct md_sysfs_entry md_raid_disks = | |
80ca3a44 | 4242 | __ATTR(raid_disks, S_IRUGO|S_IWUSR, raid_disks_show, raid_disks_store); |
eae1701f | 4243 | |
ec164d07 SP |
4244 | static ssize_t |
4245 | uuid_show(struct mddev *mddev, char *page) | |
4246 | { | |
4247 | return sprintf(page, "%pU\n", mddev->uuid); | |
4248 | } | |
4249 | static struct md_sysfs_entry md_uuid = | |
4250 | __ATTR(uuid, S_IRUGO, uuid_show, NULL); | |
4251 | ||
3b34380a | 4252 | static ssize_t |
fd01b88c | 4253 | chunk_size_show(struct mddev *mddev, char *page) |
3b34380a | 4254 | { |
08a02ecd | 4255 | if (mddev->reshape_position != MaxSector && |
664e7c41 AN |
4256 | mddev->chunk_sectors != mddev->new_chunk_sectors) |
4257 | return sprintf(page, "%d (%d)\n", | |
4258 | mddev->new_chunk_sectors << 9, | |
9d8f0363 AN |
4259 | mddev->chunk_sectors << 9); |
4260 | return sprintf(page, "%d\n", mddev->chunk_sectors << 9); | |
3b34380a N |
4261 | } |
4262 | ||
4263 | static ssize_t | |
fd01b88c | 4264 | chunk_size_store(struct mddev *mddev, const char *buf, size_t len) |
3b34380a | 4265 | { |
4c9309c0 | 4266 | unsigned long n; |
6791875e | 4267 | int err; |
3b34380a | 4268 | |
4c9309c0 AD |
4269 | err = kstrtoul(buf, 10, &n); |
4270 | if (err < 0) | |
4271 | return err; | |
3b34380a | 4272 | |
6791875e N |
4273 | err = mddev_lock(mddev); |
4274 | if (err) | |
4275 | return err; | |
b3546035 | 4276 | if (mddev->pers) { |
50ac168a | 4277 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
4278 | err = -EBUSY; |
4279 | else if (mddev->ro) | |
4280 | err = -EROFS; | |
4281 | else { | |
4282 | mddev->new_chunk_sectors = n >> 9; | |
4283 | err = mddev->pers->check_reshape(mddev); | |
4284 | if (err) | |
4285 | mddev->new_chunk_sectors = mddev->chunk_sectors; | |
597a711b | 4286 | } |
b3546035 | 4287 | } else { |
664e7c41 | 4288 | mddev->new_chunk_sectors = n >> 9; |
b3546035 | 4289 | if (mddev->reshape_position == MaxSector) |
9d8f0363 | 4290 | mddev->chunk_sectors = n >> 9; |
b3546035 | 4291 | } |
6791875e N |
4292 | mddev_unlock(mddev); |
4293 | return err ?: len; | |
3b34380a N |
4294 | } |
4295 | static struct md_sysfs_entry md_chunk_size = | |
80ca3a44 | 4296 | __ATTR(chunk_size, S_IRUGO|S_IWUSR, chunk_size_show, chunk_size_store); |
3b34380a | 4297 | |
a94213b1 | 4298 | static ssize_t |
fd01b88c | 4299 | resync_start_show(struct mddev *mddev, char *page) |
a94213b1 | 4300 | { |
d1a7c503 N |
4301 | if (mddev->recovery_cp == MaxSector) |
4302 | return sprintf(page, "none\n"); | |
a94213b1 N |
4303 | return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp); |
4304 | } | |
4305 | ||
4306 | static ssize_t | |
fd01b88c | 4307 | resync_start_store(struct mddev *mddev, const char *buf, size_t len) |
a94213b1 | 4308 | { |
4c9309c0 | 4309 | unsigned long long n; |
6791875e | 4310 | int err; |
4c9309c0 AD |
4311 | |
4312 | if (cmd_match(buf, "none")) | |
4313 | n = MaxSector; | |
4314 | else { | |
4315 | err = kstrtoull(buf, 10, &n); | |
4316 | if (err < 0) | |
4317 | return err; | |
4318 | if (n != (sector_t)n) | |
4319 | return -EINVAL; | |
4320 | } | |
a94213b1 | 4321 | |
6791875e N |
4322 | err = mddev_lock(mddev); |
4323 | if (err) | |
4324 | return err; | |
b098636c | 4325 | if (mddev->pers && !test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) |
6791875e | 4326 | err = -EBUSY; |
a94213b1 | 4327 | |
6791875e N |
4328 | if (!err) { |
4329 | mddev->recovery_cp = n; | |
4330 | if (mddev->pers) | |
2953079c | 4331 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
6791875e N |
4332 | } |
4333 | mddev_unlock(mddev); | |
4334 | return err ?: len; | |
a94213b1 N |
4335 | } |
4336 | static struct md_sysfs_entry md_resync_start = | |
750f199e N |
4337 | __ATTR_PREALLOC(resync_start, S_IRUGO|S_IWUSR, |
4338 | resync_start_show, resync_start_store); | |
a94213b1 | 4339 | |
9e653b63 N |
4340 | /* |
4341 | * The array state can be: | |
4342 | * | |
4343 | * clear | |
4344 | * No devices, no size, no level | |
4345 | * Equivalent to STOP_ARRAY ioctl | |
4346 | * inactive | |
4347 | * May have some settings, but array is not active | |
4348 | * all IO results in error | |
4349 | * When written, doesn't tear down array, but just stops it | |
4350 | * suspended (not supported yet) | |
4351 | * All IO requests will block. The array can be reconfigured. | |
910d8cb3 | 4352 | * Writing this, if accepted, will block until array is quiescent |
9e653b63 N |
4353 | * readonly |
4354 | * no resync can happen. no superblocks get written. | |
4355 | * write requests fail | |
4356 | * read-auto | |
4357 | * like readonly, but behaves like 'clean' on a write request. | |
4358 | * | |
4359 | * clean - no pending writes, but otherwise active. | |
4360 | * When written to inactive array, starts without resync | |
4361 | * If a write request arrives then | |
4362 | * if metadata is known, mark 'dirty' and switch to 'active'. | |
4363 | * if not known, block and switch to write-pending | |
4364 | * If written to an active array that has pending writes, then fails. | |
4365 | * active | |
4366 | * fully active: IO and resync can be happening. | |
4367 | * When written to inactive array, starts with resync | |
4368 | * | |
4369 | * write-pending | |
4370 | * clean, but writes are blocked waiting for 'active' to be written. | |
4371 | * | |
4372 | * active-idle | |
4373 | * like active, but no writes have been seen for a while (100msec). | |
4374 | * | |
62f7b198 GP |
4375 | * broken |
4376 | * RAID0/LINEAR-only: same as clean, but array is missing a member. | |
4377 | * It's useful because RAID0/LINEAR mounted-arrays aren't stopped | |
4378 | * when a member is gone, so this state will at least alert the | |
4379 | * user that something is wrong. | |
9e653b63 N |
4380 | */ |
4381 | enum array_state { clear, inactive, suspended, readonly, read_auto, clean, active, | |
62f7b198 | 4382 | write_pending, active_idle, broken, bad_word}; |
05381954 | 4383 | static char *array_states[] = { |
9e653b63 | 4384 | "clear", "inactive", "suspended", "readonly", "read-auto", "clean", "active", |
62f7b198 | 4385 | "write-pending", "active-idle", "broken", NULL }; |
9e653b63 N |
4386 | |
4387 | static int match_word(const char *word, char **list) | |
4388 | { | |
4389 | int n; | |
4390 | for (n=0; list[n]; n++) | |
4391 | if (cmd_match(word, list[n])) | |
4392 | break; | |
4393 | return n; | |
4394 | } | |
4395 | ||
4396 | static ssize_t | |
fd01b88c | 4397 | array_state_show(struct mddev *mddev, char *page) |
9e653b63 N |
4398 | { |
4399 | enum array_state st = inactive; | |
4400 | ||
62f7b198 | 4401 | if (mddev->pers && !test_bit(MD_NOT_READY, &mddev->flags)) { |
9e653b63 N |
4402 | switch(mddev->ro) { |
4403 | case 1: | |
4404 | st = readonly; | |
4405 | break; | |
4406 | case 2: | |
4407 | st = read_auto; | |
4408 | break; | |
4409 | case 0: | |
55cc39f3 | 4410 | spin_lock(&mddev->lock); |
2953079c | 4411 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
e691063a | 4412 | st = write_pending; |
16f88949 TM |
4413 | else if (mddev->in_sync) |
4414 | st = clean; | |
9e653b63 N |
4415 | else if (mddev->safemode) |
4416 | st = active_idle; | |
4417 | else | |
4418 | st = active; | |
55cc39f3 | 4419 | spin_unlock(&mddev->lock); |
9e653b63 | 4420 | } |
62f7b198 GP |
4421 | |
4422 | if (test_bit(MD_BROKEN, &mddev->flags) && st == clean) | |
4423 | st = broken; | |
4424 | } else { | |
9e653b63 N |
4425 | if (list_empty(&mddev->disks) && |
4426 | mddev->raid_disks == 0 && | |
58c0fed4 | 4427 | mddev->dev_sectors == 0) |
9e653b63 N |
4428 | st = clear; |
4429 | else | |
4430 | st = inactive; | |
4431 | } | |
4432 | return sprintf(page, "%s\n", array_states[st]); | |
4433 | } | |
4434 | ||
f72ffdd6 N |
4435 | static int do_md_stop(struct mddev *mddev, int ro, struct block_device *bdev); |
4436 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev); | |
fd01b88c | 4437 | static int restart_array(struct mddev *mddev); |
9e653b63 N |
4438 | |
4439 | static ssize_t | |
fd01b88c | 4440 | array_state_store(struct mddev *mddev, const char *buf, size_t len) |
9e653b63 | 4441 | { |
6497709b | 4442 | int err = 0; |
9e653b63 | 4443 | enum array_state st = match_word(buf, array_states); |
6791875e N |
4444 | |
4445 | if (mddev->pers && (st == active || st == clean) && mddev->ro != 1) { | |
4446 | /* don't take reconfig_mutex when toggling between | |
4447 | * clean and active | |
4448 | */ | |
4449 | spin_lock(&mddev->lock); | |
4450 | if (st == active) { | |
4451 | restart_array(mddev); | |
2953079c | 4452 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
91a6c4ad | 4453 | md_wakeup_thread(mddev->thread); |
6791875e | 4454 | wake_up(&mddev->sb_wait); |
6791875e N |
4455 | } else /* st == clean */ { |
4456 | restart_array(mddev); | |
6497709b | 4457 | if (!set_in_sync(mddev)) |
6791875e N |
4458 | err = -EBUSY; |
4459 | } | |
573275b5 TM |
4460 | if (!err) |
4461 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
6791875e | 4462 | spin_unlock(&mddev->lock); |
c008f1d3 | 4463 | return err ?: len; |
6791875e N |
4464 | } |
4465 | err = mddev_lock(mddev); | |
4466 | if (err) | |
4467 | return err; | |
4468 | err = -EINVAL; | |
9e653b63 N |
4469 | switch(st) { |
4470 | case bad_word: | |
4471 | break; | |
4472 | case clear: | |
4473 | /* stopping an active array */ | |
a05b7ea0 | 4474 | err = do_md_stop(mddev, 0, NULL); |
9e653b63 N |
4475 | break; |
4476 | case inactive: | |
4477 | /* stopping an active array */ | |
90cf195d | 4478 | if (mddev->pers) |
a05b7ea0 | 4479 | err = do_md_stop(mddev, 2, NULL); |
90cf195d | 4480 | else |
e691063a | 4481 | err = 0; /* already inactive */ |
9e653b63 N |
4482 | break; |
4483 | case suspended: | |
4484 | break; /* not supported yet */ | |
4485 | case readonly: | |
4486 | if (mddev->pers) | |
a05b7ea0 | 4487 | err = md_set_readonly(mddev, NULL); |
9e653b63 N |
4488 | else { |
4489 | mddev->ro = 1; | |
648b629e | 4490 | set_disk_ro(mddev->gendisk, 1); |
9e653b63 N |
4491 | err = do_md_run(mddev); |
4492 | } | |
4493 | break; | |
4494 | case read_auto: | |
9e653b63 | 4495 | if (mddev->pers) { |
80268ee9 | 4496 | if (mddev->ro == 0) |
a05b7ea0 | 4497 | err = md_set_readonly(mddev, NULL); |
80268ee9 | 4498 | else if (mddev->ro == 1) |
648b629e N |
4499 | err = restart_array(mddev); |
4500 | if (err == 0) { | |
4501 | mddev->ro = 2; | |
4502 | set_disk_ro(mddev->gendisk, 0); | |
4503 | } | |
9e653b63 N |
4504 | } else { |
4505 | mddev->ro = 2; | |
4506 | err = do_md_run(mddev); | |
4507 | } | |
4508 | break; | |
4509 | case clean: | |
4510 | if (mddev->pers) { | |
339421de SL |
4511 | err = restart_array(mddev); |
4512 | if (err) | |
4513 | break; | |
85572d7c | 4514 | spin_lock(&mddev->lock); |
6497709b | 4515 | if (!set_in_sync(mddev)) |
e691063a | 4516 | err = -EBUSY; |
85572d7c | 4517 | spin_unlock(&mddev->lock); |
5bf29597 N |
4518 | } else |
4519 | err = -EINVAL; | |
9e653b63 N |
4520 | break; |
4521 | case active: | |
4522 | if (mddev->pers) { | |
339421de SL |
4523 | err = restart_array(mddev); |
4524 | if (err) | |
4525 | break; | |
2953079c | 4526 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
9e653b63 N |
4527 | wake_up(&mddev->sb_wait); |
4528 | err = 0; | |
4529 | } else { | |
4530 | mddev->ro = 0; | |
648b629e | 4531 | set_disk_ro(mddev->gendisk, 0); |
9e653b63 N |
4532 | err = do_md_run(mddev); |
4533 | } | |
4534 | break; | |
4535 | case write_pending: | |
4536 | case active_idle: | |
62f7b198 | 4537 | case broken: |
9e653b63 N |
4538 | /* these cannot be set */ |
4539 | break; | |
4540 | } | |
6791875e N |
4541 | |
4542 | if (!err) { | |
1d23f178 N |
4543 | if (mddev->hold_active == UNTIL_IOCTL) |
4544 | mddev->hold_active = 0; | |
00bcb4ac | 4545 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 4546 | } |
6791875e N |
4547 | mddev_unlock(mddev); |
4548 | return err ?: len; | |
9e653b63 | 4549 | } |
80ca3a44 | 4550 | static struct md_sysfs_entry md_array_state = |
750f199e | 4551 | __ATTR_PREALLOC(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store); |
9e653b63 | 4552 | |
1e50915f | 4553 | static ssize_t |
fd01b88c | 4554 | max_corrected_read_errors_show(struct mddev *mddev, char *page) { |
1e50915f RB |
4555 | return sprintf(page, "%d\n", |
4556 | atomic_read(&mddev->max_corr_read_errors)); | |
4557 | } | |
4558 | ||
4559 | static ssize_t | |
fd01b88c | 4560 | max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len) |
1e50915f | 4561 | { |
4c9309c0 AD |
4562 | unsigned int n; |
4563 | int rv; | |
1e50915f | 4564 | |
4c9309c0 AD |
4565 | rv = kstrtouint(buf, 10, &n); |
4566 | if (rv < 0) | |
4567 | return rv; | |
4568 | atomic_set(&mddev->max_corr_read_errors, n); | |
4569 | return len; | |
1e50915f RB |
4570 | } |
4571 | ||
4572 | static struct md_sysfs_entry max_corr_read_errors = | |
4573 | __ATTR(max_read_errors, S_IRUGO|S_IWUSR, max_corrected_read_errors_show, | |
4574 | max_corrected_read_errors_store); | |
4575 | ||
6d7ff738 | 4576 | static ssize_t |
fd01b88c | 4577 | null_show(struct mddev *mddev, char *page) |
6d7ff738 N |
4578 | { |
4579 | return -EINVAL; | |
4580 | } | |
4581 | ||
cc1ffe61 GJ |
4582 | /* need to ensure rdev_delayed_delete() has completed */ |
4583 | static void flush_rdev_wq(struct mddev *mddev) | |
4584 | { | |
4585 | struct md_rdev *rdev; | |
4586 | ||
4587 | rcu_read_lock(); | |
4588 | rdev_for_each_rcu(rdev, mddev) | |
4589 | if (work_pending(&rdev->del_work)) { | |
4590 | flush_workqueue(md_rdev_misc_wq); | |
4591 | break; | |
4592 | } | |
4593 | rcu_read_unlock(); | |
4594 | } | |
4595 | ||
6d7ff738 | 4596 | static ssize_t |
fd01b88c | 4597 | new_dev_store(struct mddev *mddev, const char *buf, size_t len) |
6d7ff738 N |
4598 | { |
4599 | /* buf must be %d:%d\n? giving major and minor numbers */ | |
4600 | /* The new device is added to the array. | |
4601 | * If the array has a persistent superblock, we read the | |
4602 | * superblock to initialise info and check validity. | |
4603 | * Otherwise, only checking done is that in bind_rdev_to_array, | |
4604 | * which mainly checks size. | |
4605 | */ | |
4606 | char *e; | |
4607 | int major = simple_strtoul(buf, &e, 10); | |
4608 | int minor; | |
4609 | dev_t dev; | |
3cb03002 | 4610 | struct md_rdev *rdev; |
6d7ff738 N |
4611 | int err; |
4612 | ||
4613 | if (!*buf || *e != ':' || !e[1] || e[1] == '\n') | |
4614 | return -EINVAL; | |
4615 | minor = simple_strtoul(e+1, &e, 10); | |
4616 | if (*e && *e != '\n') | |
4617 | return -EINVAL; | |
4618 | dev = MKDEV(major, minor); | |
4619 | if (major != MAJOR(dev) || | |
4620 | minor != MINOR(dev)) | |
4621 | return -EOVERFLOW; | |
4622 | ||
cc1ffe61 | 4623 | flush_rdev_wq(mddev); |
6791875e N |
4624 | err = mddev_lock(mddev); |
4625 | if (err) | |
4626 | return err; | |
6d7ff738 N |
4627 | if (mddev->persistent) { |
4628 | rdev = md_import_device(dev, mddev->major_version, | |
4629 | mddev->minor_version); | |
4630 | if (!IS_ERR(rdev) && !list_empty(&mddev->disks)) { | |
3cb03002 N |
4631 | struct md_rdev *rdev0 |
4632 | = list_entry(mddev->disks.next, | |
4633 | struct md_rdev, same_set); | |
6d7ff738 N |
4634 | err = super_types[mddev->major_version] |
4635 | .load_super(rdev, rdev0, mddev->minor_version); | |
4636 | if (err < 0) | |
4637 | goto out; | |
4638 | } | |
c5d79adb N |
4639 | } else if (mddev->external) |
4640 | rdev = md_import_device(dev, -2, -1); | |
4641 | else | |
6d7ff738 N |
4642 | rdev = md_import_device(dev, -1, -1); |
4643 | ||
9a8c0fa8 N |
4644 | if (IS_ERR(rdev)) { |
4645 | mddev_unlock(mddev); | |
6d7ff738 | 4646 | return PTR_ERR(rdev); |
9a8c0fa8 | 4647 | } |
6d7ff738 N |
4648 | err = bind_rdev_to_array(rdev, mddev); |
4649 | out: | |
4650 | if (err) | |
4651 | export_rdev(rdev); | |
6791875e | 4652 | mddev_unlock(mddev); |
5492c46e AO |
4653 | if (!err) |
4654 | md_new_event(mddev); | |
6d7ff738 N |
4655 | return err ? err : len; |
4656 | } | |
4657 | ||
4658 | static struct md_sysfs_entry md_new_device = | |
80ca3a44 | 4659 | __ATTR(new_dev, S_IWUSR, null_show, new_dev_store); |
3b34380a | 4660 | |
9b1d1dac | 4661 | static ssize_t |
fd01b88c | 4662 | bitmap_store(struct mddev *mddev, const char *buf, size_t len) |
9b1d1dac PC |
4663 | { |
4664 | char *end; | |
4665 | unsigned long chunk, end_chunk; | |
6791875e | 4666 | int err; |
9b1d1dac | 4667 | |
6791875e N |
4668 | err = mddev_lock(mddev); |
4669 | if (err) | |
4670 | return err; | |
9b1d1dac PC |
4671 | if (!mddev->bitmap) |
4672 | goto out; | |
4673 | /* buf should be <chunk> <chunk> ... or <chunk>-<chunk> ... (range) */ | |
4674 | while (*buf) { | |
4675 | chunk = end_chunk = simple_strtoul(buf, &end, 0); | |
4676 | if (buf == end) break; | |
4677 | if (*end == '-') { /* range */ | |
4678 | buf = end + 1; | |
4679 | end_chunk = simple_strtoul(buf, &end, 0); | |
4680 | if (buf == end) break; | |
4681 | } | |
4682 | if (*end && !isspace(*end)) break; | |
e64e4018 | 4683 | md_bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk); |
e7d2860b | 4684 | buf = skip_spaces(end); |
9b1d1dac | 4685 | } |
e64e4018 | 4686 | md_bitmap_unplug(mddev->bitmap); /* flush the bits to disk */ |
9b1d1dac | 4687 | out: |
6791875e | 4688 | mddev_unlock(mddev); |
9b1d1dac PC |
4689 | return len; |
4690 | } | |
4691 | ||
4692 | static struct md_sysfs_entry md_bitmap = | |
4693 | __ATTR(bitmap_set_bits, S_IWUSR, null_show, bitmap_store); | |
4694 | ||
a35b0d69 | 4695 | static ssize_t |
fd01b88c | 4696 | size_show(struct mddev *mddev, char *page) |
a35b0d69 | 4697 | { |
58c0fed4 AN |
4698 | return sprintf(page, "%llu\n", |
4699 | (unsigned long long)mddev->dev_sectors / 2); | |
a35b0d69 N |
4700 | } |
4701 | ||
fd01b88c | 4702 | static int update_size(struct mddev *mddev, sector_t num_sectors); |
a35b0d69 N |
4703 | |
4704 | static ssize_t | |
fd01b88c | 4705 | size_store(struct mddev *mddev, const char *buf, size_t len) |
a35b0d69 N |
4706 | { |
4707 | /* If array is inactive, we can reduce the component size, but | |
4708 | * not increase it (except from 0). | |
4709 | * If array is active, we can try an on-line resize | |
4710 | */ | |
b522adcd DW |
4711 | sector_t sectors; |
4712 | int err = strict_blocks_to_sectors(buf, §ors); | |
a35b0d69 | 4713 | |
58c0fed4 AN |
4714 | if (err < 0) |
4715 | return err; | |
6791875e N |
4716 | err = mddev_lock(mddev); |
4717 | if (err) | |
4718 | return err; | |
a35b0d69 | 4719 | if (mddev->pers) { |
58c0fed4 | 4720 | err = update_size(mddev, sectors); |
4ba1e788 XN |
4721 | if (err == 0) |
4722 | md_update_sb(mddev, 1); | |
a35b0d69 | 4723 | } else { |
58c0fed4 AN |
4724 | if (mddev->dev_sectors == 0 || |
4725 | mddev->dev_sectors > sectors) | |
4726 | mddev->dev_sectors = sectors; | |
a35b0d69 N |
4727 | else |
4728 | err = -ENOSPC; | |
4729 | } | |
6791875e | 4730 | mddev_unlock(mddev); |
a35b0d69 N |
4731 | return err ? err : len; |
4732 | } | |
4733 | ||
4734 | static struct md_sysfs_entry md_size = | |
80ca3a44 | 4735 | __ATTR(component_size, S_IRUGO|S_IWUSR, size_show, size_store); |
a35b0d69 | 4736 | |
83f0d77a | 4737 | /* Metadata version. |
e691063a N |
4738 | * This is one of |
4739 | * 'none' for arrays with no metadata (good luck...) | |
4740 | * 'external' for arrays with externally managed metadata, | |
8bb93aac N |
4741 | * or N.M for internally known formats |
4742 | */ | |
4743 | static ssize_t | |
fd01b88c | 4744 | metadata_show(struct mddev *mddev, char *page) |
8bb93aac N |
4745 | { |
4746 | if (mddev->persistent) | |
4747 | return sprintf(page, "%d.%d\n", | |
4748 | mddev->major_version, mddev->minor_version); | |
e691063a N |
4749 | else if (mddev->external) |
4750 | return sprintf(page, "external:%s\n", mddev->metadata_type); | |
8bb93aac N |
4751 | else |
4752 | return sprintf(page, "none\n"); | |
4753 | } | |
4754 | ||
4755 | static ssize_t | |
fd01b88c | 4756 | metadata_store(struct mddev *mddev, const char *buf, size_t len) |
8bb93aac N |
4757 | { |
4758 | int major, minor; | |
4759 | char *e; | |
6791875e | 4760 | int err; |
ea43ddd8 N |
4761 | /* Changing the details of 'external' metadata is |
4762 | * always permitted. Otherwise there must be | |
4763 | * no devices attached to the array. | |
4764 | */ | |
6791875e N |
4765 | |
4766 | err = mddev_lock(mddev); | |
4767 | if (err) | |
4768 | return err; | |
4769 | err = -EBUSY; | |
ea43ddd8 N |
4770 | if (mddev->external && strncmp(buf, "external:", 9) == 0) |
4771 | ; | |
4772 | else if (!list_empty(&mddev->disks)) | |
6791875e | 4773 | goto out_unlock; |
8bb93aac | 4774 | |
6791875e | 4775 | err = 0; |
8bb93aac N |
4776 | if (cmd_match(buf, "none")) { |
4777 | mddev->persistent = 0; | |
e691063a N |
4778 | mddev->external = 0; |
4779 | mddev->major_version = 0; | |
4780 | mddev->minor_version = 90; | |
6791875e | 4781 | goto out_unlock; |
e691063a N |
4782 | } |
4783 | if (strncmp(buf, "external:", 9) == 0) { | |
20a49ff6 | 4784 | size_t namelen = len-9; |
e691063a N |
4785 | if (namelen >= sizeof(mddev->metadata_type)) |
4786 | namelen = sizeof(mddev->metadata_type)-1; | |
4787 | strncpy(mddev->metadata_type, buf+9, namelen); | |
4788 | mddev->metadata_type[namelen] = 0; | |
4789 | if (namelen && mddev->metadata_type[namelen-1] == '\n') | |
4790 | mddev->metadata_type[--namelen] = 0; | |
4791 | mddev->persistent = 0; | |
4792 | mddev->external = 1; | |
8bb93aac N |
4793 | mddev->major_version = 0; |
4794 | mddev->minor_version = 90; | |
6791875e | 4795 | goto out_unlock; |
8bb93aac N |
4796 | } |
4797 | major = simple_strtoul(buf, &e, 10); | |
6791875e | 4798 | err = -EINVAL; |
8bb93aac | 4799 | if (e==buf || *e != '.') |
6791875e | 4800 | goto out_unlock; |
8bb93aac N |
4801 | buf = e+1; |
4802 | minor = simple_strtoul(buf, &e, 10); | |
3f9d7b0d | 4803 | if (e==buf || (*e && *e != '\n') ) |
6791875e N |
4804 | goto out_unlock; |
4805 | err = -ENOENT; | |
50511da3 | 4806 | if (major >= ARRAY_SIZE(super_types) || super_types[major].name == NULL) |
6791875e | 4807 | goto out_unlock; |
8bb93aac N |
4808 | mddev->major_version = major; |
4809 | mddev->minor_version = minor; | |
4810 | mddev->persistent = 1; | |
e691063a | 4811 | mddev->external = 0; |
6791875e N |
4812 | err = 0; |
4813 | out_unlock: | |
4814 | mddev_unlock(mddev); | |
4815 | return err ?: len; | |
8bb93aac N |
4816 | } |
4817 | ||
4818 | static struct md_sysfs_entry md_metadata = | |
750f199e | 4819 | __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store); |
8bb93aac | 4820 | |
24dd469d | 4821 | static ssize_t |
fd01b88c | 4822 | action_show(struct mddev *mddev, char *page) |
24dd469d | 4823 | { |
7eec314d | 4824 | char *type = "idle"; |
b7b17c9b N |
4825 | unsigned long recovery = mddev->recovery; |
4826 | if (test_bit(MD_RECOVERY_FROZEN, &recovery)) | |
b6a9ce68 | 4827 | type = "frozen"; |
b7b17c9b N |
4828 | else if (test_bit(MD_RECOVERY_RUNNING, &recovery) || |
4829 | (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &recovery))) { | |
4830 | if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) | |
ccfcc3c1 | 4831 | type = "reshape"; |
b7b17c9b N |
4832 | else if (test_bit(MD_RECOVERY_SYNC, &recovery)) { |
4833 | if (!test_bit(MD_RECOVERY_REQUESTED, &recovery)) | |
24dd469d | 4834 | type = "resync"; |
b7b17c9b | 4835 | else if (test_bit(MD_RECOVERY_CHECK, &recovery)) |
24dd469d N |
4836 | type = "check"; |
4837 | else | |
4838 | type = "repair"; | |
b7b17c9b | 4839 | } else if (test_bit(MD_RECOVERY_RECOVER, &recovery)) |
24dd469d | 4840 | type = "recover"; |
985ca973 N |
4841 | else if (mddev->reshape_position != MaxSector) |
4842 | type = "reshape"; | |
24dd469d N |
4843 | } |
4844 | return sprintf(page, "%s\n", type); | |
4845 | } | |
4846 | ||
4847 | static ssize_t | |
fd01b88c | 4848 | action_store(struct mddev *mddev, const char *page, size_t len) |
24dd469d | 4849 | { |
7eec314d N |
4850 | if (!mddev->pers || !mddev->pers->sync_request) |
4851 | return -EINVAL; | |
4852 | ||
b6a9ce68 N |
4853 | |
4854 | if (cmd_match(page, "idle") || cmd_match(page, "frozen")) { | |
56ccc112 N |
4855 | if (cmd_match(page, "frozen")) |
4856 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4857 | else | |
4858 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
8e8e2518 N |
4859 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
4860 | mddev_lock(mddev) == 0) { | |
cc1ffe61 GJ |
4861 | if (work_pending(&mddev->del_work)) |
4862 | flush_workqueue(md_misc_wq); | |
8e8e2518 N |
4863 | if (mddev->sync_thread) { |
4864 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
6791875e | 4865 | md_reap_sync_thread(mddev); |
6791875e | 4866 | } |
8e8e2518 | 4867 | mddev_unlock(mddev); |
7eec314d | 4868 | } |
312045ee | 4869 | } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
24dd469d | 4870 | return -EBUSY; |
72a23c21 | 4871 | else if (cmd_match(page, "resync")) |
56ccc112 | 4872 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4873 | else if (cmd_match(page, "recover")) { |
56ccc112 | 4874 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4875 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
72a23c21 | 4876 | } else if (cmd_match(page, "reshape")) { |
16484bf5 N |
4877 | int err; |
4878 | if (mddev->pers->start_reshape == NULL) | |
4879 | return -EINVAL; | |
6791875e N |
4880 | err = mddev_lock(mddev); |
4881 | if (!err) { | |
312045ee N |
4882 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4883 | err = -EBUSY; | |
4884 | else { | |
4885 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4886 | err = mddev->pers->start_reshape(mddev); | |
4887 | } | |
6791875e N |
4888 | mddev_unlock(mddev); |
4889 | } | |
16484bf5 N |
4890 | if (err) |
4891 | return err; | |
e1a86dbb | 4892 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
16484bf5 | 4893 | } else { |
bce74dac | 4894 | if (cmd_match(page, "check")) |
7eec314d | 4895 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
2adc7d47 | 4896 | else if (!cmd_match(page, "repair")) |
7eec314d | 4897 | return -EINVAL; |
56ccc112 | 4898 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
7eec314d N |
4899 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
4900 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
7eec314d | 4901 | } |
48c26ddc N |
4902 | if (mddev->ro == 2) { |
4903 | /* A write to sync_action is enough to justify | |
4904 | * canceling read-auto mode | |
4905 | */ | |
4906 | mddev->ro = 0; | |
4907 | md_wakeup_thread(mddev->sync_thread); | |
4908 | } | |
03c902e1 | 4909 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
24dd469d | 4910 | md_wakeup_thread(mddev->thread); |
00bcb4ac | 4911 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
24dd469d N |
4912 | return len; |
4913 | } | |
4914 | ||
c4a39551 | 4915 | static struct md_sysfs_entry md_scan_mode = |
750f199e | 4916 | __ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store); |
c4a39551 JB |
4917 | |
4918 | static ssize_t | |
4919 | last_sync_action_show(struct mddev *mddev, char *page) | |
4920 | { | |
4921 | return sprintf(page, "%s\n", mddev->last_sync_action); | |
4922 | } | |
4923 | ||
4924 | static struct md_sysfs_entry md_last_scan_mode = __ATTR_RO(last_sync_action); | |
4925 | ||
9d88883e | 4926 | static ssize_t |
fd01b88c | 4927 | mismatch_cnt_show(struct mddev *mddev, char *page) |
9d88883e N |
4928 | { |
4929 | return sprintf(page, "%llu\n", | |
7f7583d4 JM |
4930 | (unsigned long long) |
4931 | atomic64_read(&mddev->resync_mismatches)); | |
9d88883e N |
4932 | } |
4933 | ||
80ca3a44 | 4934 | static struct md_sysfs_entry md_mismatches = __ATTR_RO(mismatch_cnt); |
9d88883e | 4935 | |
88202a0c | 4936 | static ssize_t |
fd01b88c | 4937 | sync_min_show(struct mddev *mddev, char *page) |
88202a0c N |
4938 | { |
4939 | return sprintf(page, "%d (%s)\n", speed_min(mddev), | |
4940 | mddev->sync_speed_min ? "local": "system"); | |
4941 | } | |
4942 | ||
4943 | static ssize_t | |
fd01b88c | 4944 | sync_min_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4945 | { |
4c9309c0 AD |
4946 | unsigned int min; |
4947 | int rv; | |
4948 | ||
88202a0c | 4949 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4950 | min = 0; |
4951 | } else { | |
4952 | rv = kstrtouint(buf, 10, &min); | |
4953 | if (rv < 0) | |
4954 | return rv; | |
4955 | if (min == 0) | |
4956 | return -EINVAL; | |
88202a0c | 4957 | } |
88202a0c N |
4958 | mddev->sync_speed_min = min; |
4959 | return len; | |
4960 | } | |
4961 | ||
4962 | static struct md_sysfs_entry md_sync_min = | |
4963 | __ATTR(sync_speed_min, S_IRUGO|S_IWUSR, sync_min_show, sync_min_store); | |
4964 | ||
4965 | static ssize_t | |
fd01b88c | 4966 | sync_max_show(struct mddev *mddev, char *page) |
88202a0c N |
4967 | { |
4968 | return sprintf(page, "%d (%s)\n", speed_max(mddev), | |
4969 | mddev->sync_speed_max ? "local": "system"); | |
4970 | } | |
4971 | ||
4972 | static ssize_t | |
fd01b88c | 4973 | sync_max_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4974 | { |
4c9309c0 AD |
4975 | unsigned int max; |
4976 | int rv; | |
4977 | ||
88202a0c | 4978 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4979 | max = 0; |
4980 | } else { | |
4981 | rv = kstrtouint(buf, 10, &max); | |
4982 | if (rv < 0) | |
4983 | return rv; | |
4984 | if (max == 0) | |
4985 | return -EINVAL; | |
88202a0c | 4986 | } |
88202a0c N |
4987 | mddev->sync_speed_max = max; |
4988 | return len; | |
4989 | } | |
4990 | ||
4991 | static struct md_sysfs_entry md_sync_max = | |
4992 | __ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store); | |
4993 | ||
d7f3d291 | 4994 | static ssize_t |
fd01b88c | 4995 | degraded_show(struct mddev *mddev, char *page) |
d7f3d291 IP |
4996 | { |
4997 | return sprintf(page, "%d\n", mddev->degraded); | |
4998 | } | |
4999 | static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded); | |
88202a0c | 5000 | |
90b08710 | 5001 | static ssize_t |
fd01b88c | 5002 | sync_force_parallel_show(struct mddev *mddev, char *page) |
90b08710 BS |
5003 | { |
5004 | return sprintf(page, "%d\n", mddev->parallel_resync); | |
5005 | } | |
5006 | ||
5007 | static ssize_t | |
fd01b88c | 5008 | sync_force_parallel_store(struct mddev *mddev, const char *buf, size_t len) |
90b08710 BS |
5009 | { |
5010 | long n; | |
5011 | ||
b29bebd6 | 5012 | if (kstrtol(buf, 10, &n)) |
90b08710 BS |
5013 | return -EINVAL; |
5014 | ||
5015 | if (n != 0 && n != 1) | |
5016 | return -EINVAL; | |
5017 | ||
5018 | mddev->parallel_resync = n; | |
5019 | ||
5020 | if (mddev->sync_thread) | |
5021 | wake_up(&resync_wait); | |
5022 | ||
5023 | return len; | |
5024 | } | |
5025 | ||
5026 | /* force parallel resync, even with shared block devices */ | |
5027 | static struct md_sysfs_entry md_sync_force_parallel = | |
5028 | __ATTR(sync_force_parallel, S_IRUGO|S_IWUSR, | |
5029 | sync_force_parallel_show, sync_force_parallel_store); | |
5030 | ||
88202a0c | 5031 | static ssize_t |
fd01b88c | 5032 | sync_speed_show(struct mddev *mddev, char *page) |
88202a0c N |
5033 | { |
5034 | unsigned long resync, dt, db; | |
d1a7c503 N |
5035 | if (mddev->curr_resync == 0) |
5036 | return sprintf(page, "none\n"); | |
9687a60c AN |
5037 | resync = mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active); |
5038 | dt = (jiffies - mddev->resync_mark) / HZ; | |
88202a0c | 5039 | if (!dt) dt++; |
9687a60c AN |
5040 | db = resync - mddev->resync_mark_cnt; |
5041 | return sprintf(page, "%lu\n", db/dt/2); /* K/sec */ | |
88202a0c N |
5042 | } |
5043 | ||
80ca3a44 | 5044 | static struct md_sysfs_entry md_sync_speed = __ATTR_RO(sync_speed); |
88202a0c N |
5045 | |
5046 | static ssize_t | |
fd01b88c | 5047 | sync_completed_show(struct mddev *mddev, char *page) |
88202a0c | 5048 | { |
13ae864b | 5049 | unsigned long long max_sectors, resync; |
88202a0c | 5050 | |
acb180b0 N |
5051 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
5052 | return sprintf(page, "none\n"); | |
5053 | ||
72f36d59 N |
5054 | if (mddev->curr_resync == 1 || |
5055 | mddev->curr_resync == 2) | |
5056 | return sprintf(page, "delayed\n"); | |
5057 | ||
c804cdec N |
5058 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
5059 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
58c0fed4 | 5060 | max_sectors = mddev->resync_max_sectors; |
88202a0c | 5061 | else |
58c0fed4 | 5062 | max_sectors = mddev->dev_sectors; |
88202a0c | 5063 | |
acb180b0 | 5064 | resync = mddev->curr_resync_completed; |
13ae864b | 5065 | return sprintf(page, "%llu / %llu\n", resync, max_sectors); |
88202a0c N |
5066 | } |
5067 | ||
750f199e N |
5068 | static struct md_sysfs_entry md_sync_completed = |
5069 | __ATTR_PREALLOC(sync_completed, S_IRUGO, sync_completed_show, NULL); | |
88202a0c | 5070 | |
5e96ee65 | 5071 | static ssize_t |
fd01b88c | 5072 | min_sync_show(struct mddev *mddev, char *page) |
5e96ee65 NB |
5073 | { |
5074 | return sprintf(page, "%llu\n", | |
5075 | (unsigned long long)mddev->resync_min); | |
5076 | } | |
5077 | static ssize_t | |
fd01b88c | 5078 | min_sync_store(struct mddev *mddev, const char *buf, size_t len) |
5e96ee65 NB |
5079 | { |
5080 | unsigned long long min; | |
23da422b | 5081 | int err; |
23da422b | 5082 | |
b29bebd6 | 5083 | if (kstrtoull(buf, 10, &min)) |
5e96ee65 | 5084 | return -EINVAL; |
23da422b N |
5085 | |
5086 | spin_lock(&mddev->lock); | |
5087 | err = -EINVAL; | |
5e96ee65 | 5088 | if (min > mddev->resync_max) |
23da422b N |
5089 | goto out_unlock; |
5090 | ||
5091 | err = -EBUSY; | |
5e96ee65 | 5092 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 5093 | goto out_unlock; |
5e96ee65 | 5094 | |
50c37b13 N |
5095 | /* Round down to multiple of 4K for safety */ |
5096 | mddev->resync_min = round_down(min, 8); | |
23da422b | 5097 | err = 0; |
5e96ee65 | 5098 | |
23da422b N |
5099 | out_unlock: |
5100 | spin_unlock(&mddev->lock); | |
5101 | return err ?: len; | |
5e96ee65 NB |
5102 | } |
5103 | ||
5104 | static struct md_sysfs_entry md_min_sync = | |
5105 | __ATTR(sync_min, S_IRUGO|S_IWUSR, min_sync_show, min_sync_store); | |
5106 | ||
c6207277 | 5107 | static ssize_t |
fd01b88c | 5108 | max_sync_show(struct mddev *mddev, char *page) |
c6207277 N |
5109 | { |
5110 | if (mddev->resync_max == MaxSector) | |
5111 | return sprintf(page, "max\n"); | |
5112 | else | |
5113 | return sprintf(page, "%llu\n", | |
5114 | (unsigned long long)mddev->resync_max); | |
5115 | } | |
5116 | static ssize_t | |
fd01b88c | 5117 | max_sync_store(struct mddev *mddev, const char *buf, size_t len) |
c6207277 | 5118 | { |
23da422b N |
5119 | int err; |
5120 | spin_lock(&mddev->lock); | |
c6207277 N |
5121 | if (strncmp(buf, "max", 3) == 0) |
5122 | mddev->resync_max = MaxSector; | |
5123 | else { | |
5e96ee65 | 5124 | unsigned long long max; |
23da422b N |
5125 | int chunk; |
5126 | ||
5127 | err = -EINVAL; | |
b29bebd6 | 5128 | if (kstrtoull(buf, 10, &max)) |
23da422b | 5129 | goto out_unlock; |
5e96ee65 | 5130 | if (max < mddev->resync_min) |
23da422b N |
5131 | goto out_unlock; |
5132 | ||
5133 | err = -EBUSY; | |
c6207277 | 5134 | if (max < mddev->resync_max && |
4d484a4a | 5135 | mddev->ro == 0 && |
c6207277 | 5136 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 5137 | goto out_unlock; |
c6207277 N |
5138 | |
5139 | /* Must be a multiple of chunk_size */ | |
23da422b N |
5140 | chunk = mddev->chunk_sectors; |
5141 | if (chunk) { | |
2ac06c33 | 5142 | sector_t temp = max; |
23da422b N |
5143 | |
5144 | err = -EINVAL; | |
5145 | if (sector_div(temp, chunk)) | |
5146 | goto out_unlock; | |
c6207277 N |
5147 | } |
5148 | mddev->resync_max = max; | |
5149 | } | |
5150 | wake_up(&mddev->recovery_wait); | |
23da422b N |
5151 | err = 0; |
5152 | out_unlock: | |
5153 | spin_unlock(&mddev->lock); | |
5154 | return err ?: len; | |
c6207277 N |
5155 | } |
5156 | ||
5157 | static struct md_sysfs_entry md_max_sync = | |
5158 | __ATTR(sync_max, S_IRUGO|S_IWUSR, max_sync_show, max_sync_store); | |
5159 | ||
e464eafd | 5160 | static ssize_t |
fd01b88c | 5161 | suspend_lo_show(struct mddev *mddev, char *page) |
e464eafd N |
5162 | { |
5163 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_lo); | |
5164 | } | |
5165 | ||
5166 | static ssize_t | |
fd01b88c | 5167 | suspend_lo_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5168 | { |
b03e0ccb | 5169 | unsigned long long new; |
6791875e | 5170 | int err; |
e464eafd | 5171 | |
4c9309c0 AD |
5172 | err = kstrtoull(buf, 10, &new); |
5173 | if (err < 0) | |
5174 | return err; | |
5175 | if (new != (sector_t)new) | |
e464eafd | 5176 | return -EINVAL; |
23ddff37 | 5177 | |
6791875e N |
5178 | err = mddev_lock(mddev); |
5179 | if (err) | |
5180 | return err; | |
5181 | err = -EINVAL; | |
5182 | if (mddev->pers == NULL || | |
5183 | mddev->pers->quiesce == NULL) | |
5184 | goto unlock; | |
b03e0ccb | 5185 | mddev_suspend(mddev); |
23ddff37 | 5186 | mddev->suspend_lo = new; |
b03e0ccb N |
5187 | mddev_resume(mddev); |
5188 | ||
6791875e N |
5189 | err = 0; |
5190 | unlock: | |
5191 | mddev_unlock(mddev); | |
5192 | return err ?: len; | |
e464eafd N |
5193 | } |
5194 | static struct md_sysfs_entry md_suspend_lo = | |
5195 | __ATTR(suspend_lo, S_IRUGO|S_IWUSR, suspend_lo_show, suspend_lo_store); | |
5196 | ||
e464eafd | 5197 | static ssize_t |
fd01b88c | 5198 | suspend_hi_show(struct mddev *mddev, char *page) |
e464eafd N |
5199 | { |
5200 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_hi); | |
5201 | } | |
5202 | ||
5203 | static ssize_t | |
fd01b88c | 5204 | suspend_hi_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5205 | { |
b03e0ccb | 5206 | unsigned long long new; |
6791875e | 5207 | int err; |
e464eafd | 5208 | |
4c9309c0 AD |
5209 | err = kstrtoull(buf, 10, &new); |
5210 | if (err < 0) | |
5211 | return err; | |
5212 | if (new != (sector_t)new) | |
e464eafd | 5213 | return -EINVAL; |
23ddff37 | 5214 | |
6791875e N |
5215 | err = mddev_lock(mddev); |
5216 | if (err) | |
5217 | return err; | |
5218 | err = -EINVAL; | |
b03e0ccb | 5219 | if (mddev->pers == NULL) |
6791875e | 5220 | goto unlock; |
b03e0ccb N |
5221 | |
5222 | mddev_suspend(mddev); | |
23ddff37 | 5223 | mddev->suspend_hi = new; |
b03e0ccb N |
5224 | mddev_resume(mddev); |
5225 | ||
6791875e N |
5226 | err = 0; |
5227 | unlock: | |
5228 | mddev_unlock(mddev); | |
5229 | return err ?: len; | |
e464eafd N |
5230 | } |
5231 | static struct md_sysfs_entry md_suspend_hi = | |
5232 | __ATTR(suspend_hi, S_IRUGO|S_IWUSR, suspend_hi_show, suspend_hi_store); | |
5233 | ||
08a02ecd | 5234 | static ssize_t |
fd01b88c | 5235 | reshape_position_show(struct mddev *mddev, char *page) |
08a02ecd N |
5236 | { |
5237 | if (mddev->reshape_position != MaxSector) | |
5238 | return sprintf(page, "%llu\n", | |
5239 | (unsigned long long)mddev->reshape_position); | |
5240 | strcpy(page, "none\n"); | |
5241 | return 5; | |
5242 | } | |
5243 | ||
5244 | static ssize_t | |
fd01b88c | 5245 | reshape_position_store(struct mddev *mddev, const char *buf, size_t len) |
08a02ecd | 5246 | { |
c6563a8c | 5247 | struct md_rdev *rdev; |
4c9309c0 | 5248 | unsigned long long new; |
6791875e | 5249 | int err; |
6791875e | 5250 | |
4c9309c0 AD |
5251 | err = kstrtoull(buf, 10, &new); |
5252 | if (err < 0) | |
5253 | return err; | |
5254 | if (new != (sector_t)new) | |
08a02ecd | 5255 | return -EINVAL; |
6791875e N |
5256 | err = mddev_lock(mddev); |
5257 | if (err) | |
5258 | return err; | |
5259 | err = -EBUSY; | |
5260 | if (mddev->pers) | |
5261 | goto unlock; | |
08a02ecd N |
5262 | mddev->reshape_position = new; |
5263 | mddev->delta_disks = 0; | |
2c810cdd | 5264 | mddev->reshape_backwards = 0; |
08a02ecd N |
5265 | mddev->new_level = mddev->level; |
5266 | mddev->new_layout = mddev->layout; | |
664e7c41 | 5267 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
c6563a8c N |
5268 | rdev_for_each(rdev, mddev) |
5269 | rdev->new_data_offset = rdev->data_offset; | |
6791875e N |
5270 | err = 0; |
5271 | unlock: | |
5272 | mddev_unlock(mddev); | |
5273 | return err ?: len; | |
08a02ecd N |
5274 | } |
5275 | ||
5276 | static struct md_sysfs_entry md_reshape_position = | |
5277 | __ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show, | |
5278 | reshape_position_store); | |
5279 | ||
2c810cdd N |
5280 | static ssize_t |
5281 | reshape_direction_show(struct mddev *mddev, char *page) | |
5282 | { | |
5283 | return sprintf(page, "%s\n", | |
5284 | mddev->reshape_backwards ? "backwards" : "forwards"); | |
5285 | } | |
5286 | ||
5287 | static ssize_t | |
5288 | reshape_direction_store(struct mddev *mddev, const char *buf, size_t len) | |
5289 | { | |
5290 | int backwards = 0; | |
6791875e N |
5291 | int err; |
5292 | ||
2c810cdd N |
5293 | if (cmd_match(buf, "forwards")) |
5294 | backwards = 0; | |
5295 | else if (cmd_match(buf, "backwards")) | |
5296 | backwards = 1; | |
5297 | else | |
5298 | return -EINVAL; | |
5299 | if (mddev->reshape_backwards == backwards) | |
5300 | return len; | |
5301 | ||
6791875e N |
5302 | err = mddev_lock(mddev); |
5303 | if (err) | |
5304 | return err; | |
2c810cdd N |
5305 | /* check if we are allowed to change */ |
5306 | if (mddev->delta_disks) | |
6791875e N |
5307 | err = -EBUSY; |
5308 | else if (mddev->persistent && | |
2c810cdd | 5309 | mddev->major_version == 0) |
6791875e N |
5310 | err = -EINVAL; |
5311 | else | |
5312 | mddev->reshape_backwards = backwards; | |
5313 | mddev_unlock(mddev); | |
5314 | return err ?: len; | |
2c810cdd N |
5315 | } |
5316 | ||
5317 | static struct md_sysfs_entry md_reshape_direction = | |
5318 | __ATTR(reshape_direction, S_IRUGO|S_IWUSR, reshape_direction_show, | |
5319 | reshape_direction_store); | |
5320 | ||
b522adcd | 5321 | static ssize_t |
fd01b88c | 5322 | array_size_show(struct mddev *mddev, char *page) |
b522adcd DW |
5323 | { |
5324 | if (mddev->external_size) | |
5325 | return sprintf(page, "%llu\n", | |
5326 | (unsigned long long)mddev->array_sectors/2); | |
5327 | else | |
5328 | return sprintf(page, "default\n"); | |
5329 | } | |
5330 | ||
5331 | static ssize_t | |
fd01b88c | 5332 | array_size_store(struct mddev *mddev, const char *buf, size_t len) |
b522adcd DW |
5333 | { |
5334 | sector_t sectors; | |
6791875e N |
5335 | int err; |
5336 | ||
5337 | err = mddev_lock(mddev); | |
5338 | if (err) | |
5339 | return err; | |
b522adcd | 5340 | |
ab5a98b1 | 5341 | /* cluster raid doesn't support change array_sectors */ |
b670883b ZL |
5342 | if (mddev_is_clustered(mddev)) { |
5343 | mddev_unlock(mddev); | |
ab5a98b1 | 5344 | return -EINVAL; |
b670883b | 5345 | } |
ab5a98b1 | 5346 | |
b522adcd DW |
5347 | if (strncmp(buf, "default", 7) == 0) { |
5348 | if (mddev->pers) | |
5349 | sectors = mddev->pers->size(mddev, 0, 0); | |
5350 | else | |
5351 | sectors = mddev->array_sectors; | |
5352 | ||
5353 | mddev->external_size = 0; | |
5354 | } else { | |
5355 | if (strict_blocks_to_sectors(buf, §ors) < 0) | |
6791875e N |
5356 | err = -EINVAL; |
5357 | else if (mddev->pers && mddev->pers->size(mddev, 0, 0) < sectors) | |
5358 | err = -E2BIG; | |
5359 | else | |
5360 | mddev->external_size = 1; | |
b522adcd DW |
5361 | } |
5362 | ||
6791875e N |
5363 | if (!err) { |
5364 | mddev->array_sectors = sectors; | |
2c247c51 CH |
5365 | if (mddev->pers) |
5366 | set_capacity_and_notify(mddev->gendisk, | |
5367 | mddev->array_sectors); | |
cbe6ef1d | 5368 | } |
6791875e N |
5369 | mddev_unlock(mddev); |
5370 | return err ?: len; | |
b522adcd DW |
5371 | } |
5372 | ||
5373 | static struct md_sysfs_entry md_array_size = | |
5374 | __ATTR(array_size, S_IRUGO|S_IWUSR, array_size_show, | |
5375 | array_size_store); | |
e464eafd | 5376 | |
664aed04 AP |
5377 | static ssize_t |
5378 | consistency_policy_show(struct mddev *mddev, char *page) | |
5379 | { | |
5380 | int ret; | |
5381 | ||
5382 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) { | |
5383 | ret = sprintf(page, "journal\n"); | |
5384 | } else if (test_bit(MD_HAS_PPL, &mddev->flags)) { | |
5385 | ret = sprintf(page, "ppl\n"); | |
5386 | } else if (mddev->bitmap) { | |
5387 | ret = sprintf(page, "bitmap\n"); | |
5388 | } else if (mddev->pers) { | |
5389 | if (mddev->pers->sync_request) | |
5390 | ret = sprintf(page, "resync\n"); | |
5391 | else | |
5392 | ret = sprintf(page, "none\n"); | |
5393 | } else { | |
5394 | ret = sprintf(page, "unknown\n"); | |
5395 | } | |
5396 | ||
5397 | return ret; | |
5398 | } | |
5399 | ||
5400 | static ssize_t | |
5401 | consistency_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5402 | { | |
ba903a3e AP |
5403 | int err = 0; |
5404 | ||
664aed04 | 5405 | if (mddev->pers) { |
ba903a3e AP |
5406 | if (mddev->pers->change_consistency_policy) |
5407 | err = mddev->pers->change_consistency_policy(mddev, buf); | |
5408 | else | |
5409 | err = -EBUSY; | |
664aed04 AP |
5410 | } else if (mddev->external && strncmp(buf, "ppl", 3) == 0) { |
5411 | set_bit(MD_HAS_PPL, &mddev->flags); | |
664aed04 | 5412 | } else { |
ba903a3e | 5413 | err = -EINVAL; |
664aed04 | 5414 | } |
ba903a3e AP |
5415 | |
5416 | return err ? err : len; | |
664aed04 AP |
5417 | } |
5418 | ||
5419 | static struct md_sysfs_entry md_consistency_policy = | |
5420 | __ATTR(consistency_policy, S_IRUGO | S_IWUSR, consistency_policy_show, | |
5421 | consistency_policy_store); | |
5422 | ||
9a567843 GJ |
5423 | static ssize_t fail_last_dev_show(struct mddev *mddev, char *page) |
5424 | { | |
5425 | return sprintf(page, "%d\n", mddev->fail_last_dev); | |
5426 | } | |
5427 | ||
5428 | /* | |
5429 | * Setting fail_last_dev to true to allow last device to be forcibly removed | |
5430 | * from RAID1/RAID10. | |
5431 | */ | |
5432 | static ssize_t | |
5433 | fail_last_dev_store(struct mddev *mddev, const char *buf, size_t len) | |
5434 | { | |
5435 | int ret; | |
5436 | bool value; | |
5437 | ||
5438 | ret = kstrtobool(buf, &value); | |
5439 | if (ret) | |
5440 | return ret; | |
5441 | ||
5442 | if (value != mddev->fail_last_dev) | |
5443 | mddev->fail_last_dev = value; | |
5444 | ||
5445 | return len; | |
5446 | } | |
5447 | static struct md_sysfs_entry md_fail_last_dev = | |
5448 | __ATTR(fail_last_dev, S_IRUGO | S_IWUSR, fail_last_dev_show, | |
5449 | fail_last_dev_store); | |
5450 | ||
3938f5fb GJ |
5451 | static ssize_t serialize_policy_show(struct mddev *mddev, char *page) |
5452 | { | |
5453 | if (mddev->pers == NULL || (mddev->pers->level != 1)) | |
5454 | return sprintf(page, "n/a\n"); | |
5455 | else | |
5456 | return sprintf(page, "%d\n", mddev->serialize_policy); | |
5457 | } | |
5458 | ||
5459 | /* | |
5460 | * Setting serialize_policy to true to enforce write IO is not reordered | |
5461 | * for raid1. | |
5462 | */ | |
5463 | static ssize_t | |
5464 | serialize_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5465 | { | |
5466 | int err; | |
5467 | bool value; | |
5468 | ||
5469 | err = kstrtobool(buf, &value); | |
5470 | if (err) | |
5471 | return err; | |
5472 | ||
5473 | if (value == mddev->serialize_policy) | |
5474 | return len; | |
5475 | ||
5476 | err = mddev_lock(mddev); | |
5477 | if (err) | |
5478 | return err; | |
5479 | if (mddev->pers == NULL || (mddev->pers->level != 1)) { | |
5480 | pr_err("md: serialize_policy is only effective for raid1\n"); | |
5481 | err = -EINVAL; | |
5482 | goto unlock; | |
5483 | } | |
5484 | ||
5485 | mddev_suspend(mddev); | |
5486 | if (value) | |
5487 | mddev_create_serial_pool(mddev, NULL, true); | |
5488 | else | |
5489 | mddev_destroy_serial_pool(mddev, NULL, true); | |
5490 | mddev->serialize_policy = value; | |
5491 | mddev_resume(mddev); | |
5492 | unlock: | |
5493 | mddev_unlock(mddev); | |
5494 | return err ?: len; | |
5495 | } | |
5496 | ||
5497 | static struct md_sysfs_entry md_serialize_policy = | |
5498 | __ATTR(serialize_policy, S_IRUGO | S_IWUSR, serialize_policy_show, | |
5499 | serialize_policy_store); | |
5500 | ||
5501 | ||
eae1701f N |
5502 | static struct attribute *md_default_attrs[] = { |
5503 | &md_level.attr, | |
d4dbd025 | 5504 | &md_layout.attr, |
eae1701f | 5505 | &md_raid_disks.attr, |
ec164d07 | 5506 | &md_uuid.attr, |
3b34380a | 5507 | &md_chunk_size.attr, |
a35b0d69 | 5508 | &md_size.attr, |
a94213b1 | 5509 | &md_resync_start.attr, |
8bb93aac | 5510 | &md_metadata.attr, |
6d7ff738 | 5511 | &md_new_device.attr, |
16f17b39 | 5512 | &md_safe_delay.attr, |
9e653b63 | 5513 | &md_array_state.attr, |
08a02ecd | 5514 | &md_reshape_position.attr, |
2c810cdd | 5515 | &md_reshape_direction.attr, |
b522adcd | 5516 | &md_array_size.attr, |
1e50915f | 5517 | &max_corr_read_errors.attr, |
664aed04 | 5518 | &md_consistency_policy.attr, |
9a567843 | 5519 | &md_fail_last_dev.attr, |
3938f5fb | 5520 | &md_serialize_policy.attr, |
411036fa N |
5521 | NULL, |
5522 | }; | |
5523 | ||
5524 | static struct attribute *md_redundancy_attrs[] = { | |
24dd469d | 5525 | &md_scan_mode.attr, |
c4a39551 | 5526 | &md_last_scan_mode.attr, |
9d88883e | 5527 | &md_mismatches.attr, |
88202a0c N |
5528 | &md_sync_min.attr, |
5529 | &md_sync_max.attr, | |
5530 | &md_sync_speed.attr, | |
90b08710 | 5531 | &md_sync_force_parallel.attr, |
88202a0c | 5532 | &md_sync_completed.attr, |
5e96ee65 | 5533 | &md_min_sync.attr, |
c6207277 | 5534 | &md_max_sync.attr, |
e464eafd N |
5535 | &md_suspend_lo.attr, |
5536 | &md_suspend_hi.attr, | |
9b1d1dac | 5537 | &md_bitmap.attr, |
d7f3d291 | 5538 | &md_degraded.attr, |
eae1701f N |
5539 | NULL, |
5540 | }; | |
411036fa N |
5541 | static struct attribute_group md_redundancy_group = { |
5542 | .name = NULL, | |
5543 | .attrs = md_redundancy_attrs, | |
5544 | }; | |
5545 | ||
eae1701f N |
5546 | static ssize_t |
5547 | md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
5548 | { | |
5549 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5550 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5551 | ssize_t rv; |
eae1701f N |
5552 | |
5553 | if (!entry->show) | |
5554 | return -EIO; | |
af8a2434 N |
5555 | spin_lock(&all_mddevs_lock); |
5556 | if (list_empty(&mddev->all_mddevs)) { | |
5557 | spin_unlock(&all_mddevs_lock); | |
5558 | return -EBUSY; | |
5559 | } | |
5560 | mddev_get(mddev); | |
5561 | spin_unlock(&all_mddevs_lock); | |
5562 | ||
b7b17c9b | 5563 | rv = entry->show(mddev, page); |
af8a2434 | 5564 | mddev_put(mddev); |
96de1e66 | 5565 | return rv; |
eae1701f N |
5566 | } |
5567 | ||
5568 | static ssize_t | |
5569 | md_attr_store(struct kobject *kobj, struct attribute *attr, | |
5570 | const char *page, size_t length) | |
5571 | { | |
5572 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5573 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5574 | ssize_t rv; |
eae1701f N |
5575 | |
5576 | if (!entry->store) | |
5577 | return -EIO; | |
67463acb N |
5578 | if (!capable(CAP_SYS_ADMIN)) |
5579 | return -EACCES; | |
af8a2434 N |
5580 | spin_lock(&all_mddevs_lock); |
5581 | if (list_empty(&mddev->all_mddevs)) { | |
5582 | spin_unlock(&all_mddevs_lock); | |
5583 | return -EBUSY; | |
5584 | } | |
5585 | mddev_get(mddev); | |
5586 | spin_unlock(&all_mddevs_lock); | |
6791875e | 5587 | rv = entry->store(mddev, page, length); |
af8a2434 | 5588 | mddev_put(mddev); |
96de1e66 | 5589 | return rv; |
eae1701f N |
5590 | } |
5591 | ||
5592 | static void md_free(struct kobject *ko) | |
5593 | { | |
fd01b88c | 5594 | struct mddev *mddev = container_of(ko, struct mddev, kobj); |
a21d1504 N |
5595 | |
5596 | if (mddev->sysfs_state) | |
5597 | sysfs_put(mddev->sysfs_state); | |
e1a86dbb JB |
5598 | if (mddev->sysfs_level) |
5599 | sysfs_put(mddev->sysfs_level); | |
5600 | ||
d8115c35 BVA |
5601 | if (mddev->gendisk) |
5602 | del_gendisk(mddev->gendisk); | |
6cd18e71 N |
5603 | if (mddev->queue) |
5604 | blk_cleanup_queue(mddev->queue); | |
d8115c35 | 5605 | if (mddev->gendisk) |
a21d1504 | 5606 | put_disk(mddev->gendisk); |
4ad23a97 | 5607 | percpu_ref_exit(&mddev->writes_pending); |
a21d1504 | 5608 | |
28dec870 KO |
5609 | bioset_exit(&mddev->bio_set); |
5610 | bioset_exit(&mddev->sync_set); | |
41d2d848 | 5611 | mempool_exit(&mddev->md_io_pool); |
eae1701f N |
5612 | kfree(mddev); |
5613 | } | |
5614 | ||
52cf25d0 | 5615 | static const struct sysfs_ops md_sysfs_ops = { |
eae1701f N |
5616 | .show = md_attr_show, |
5617 | .store = md_attr_store, | |
5618 | }; | |
5619 | static struct kobj_type md_ktype = { | |
5620 | .release = md_free, | |
5621 | .sysfs_ops = &md_sysfs_ops, | |
5622 | .default_attrs = md_default_attrs, | |
5623 | }; | |
5624 | ||
1da177e4 LT |
5625 | int mdp_major = 0; |
5626 | ||
5fd3a17e DW |
5627 | static void mddev_delayed_delete(struct work_struct *ws) |
5628 | { | |
fd01b88c | 5629 | struct mddev *mddev = container_of(ws, struct mddev, del_work); |
5fd3a17e | 5630 | |
43a70507 | 5631 | sysfs_remove_group(&mddev->kobj, &md_bitmap_group); |
5fd3a17e DW |
5632 | kobject_del(&mddev->kobj); |
5633 | kobject_put(&mddev->kobj); | |
5634 | } | |
5635 | ||
4ad23a97 N |
5636 | static void no_op(struct percpu_ref *r) {} |
5637 | ||
a415c0f1 N |
5638 | int mddev_init_writes_pending(struct mddev *mddev) |
5639 | { | |
5640 | if (mddev->writes_pending.percpu_count_ptr) | |
5641 | return 0; | |
ddde2af7 RG |
5642 | if (percpu_ref_init(&mddev->writes_pending, no_op, |
5643 | PERCPU_REF_ALLOW_REINIT, GFP_KERNEL) < 0) | |
a415c0f1 N |
5644 | return -ENOMEM; |
5645 | /* We want to start with the refcount at zero */ | |
5646 | percpu_ref_put(&mddev->writes_pending); | |
5647 | return 0; | |
5648 | } | |
5649 | EXPORT_SYMBOL_GPL(mddev_init_writes_pending); | |
5650 | ||
efeb53c0 | 5651 | static int md_alloc(dev_t dev, char *name) |
1da177e4 | 5652 | { |
039b7225 N |
5653 | /* |
5654 | * If dev is zero, name is the name of a device to allocate with | |
5655 | * an arbitrary minor number. It will be "md_???" | |
5656 | * If dev is non-zero it must be a device number with a MAJOR of | |
5657 | * MD_MAJOR or mdp_major. In this case, if "name" is NULL, then | |
5658 | * the device is being created by opening a node in /dev. | |
5659 | * If "name" is not NULL, the device is being created by | |
5660 | * writing to /sys/module/md_mod/parameters/new_array. | |
5661 | */ | |
48c9c27b | 5662 | static DEFINE_MUTEX(disks_mutex); |
0d809b38 | 5663 | struct mddev *mddev; |
1da177e4 | 5664 | struct gendisk *disk; |
efeb53c0 N |
5665 | int partitioned; |
5666 | int shift; | |
5667 | int unit; | |
0d809b38 | 5668 | int error ; |
efeb53c0 | 5669 | |
0d809b38 CH |
5670 | /* |
5671 | * Wait for any previous instance of this device to be completely | |
5672 | * removed (mddev_delayed_delete). | |
d3374825 | 5673 | */ |
e804ac78 | 5674 | flush_workqueue(md_misc_wq); |
d3374825 | 5675 | |
48c9c27b | 5676 | mutex_lock(&disks_mutex); |
0d809b38 CH |
5677 | mddev = mddev_alloc(dev); |
5678 | if (IS_ERR(mddev)) { | |
5679 | mutex_unlock(&disks_mutex); | |
5680 | return PTR_ERR(mddev); | |
5681 | } | |
5682 | ||
5683 | partitioned = (MAJOR(mddev->unit) != MD_MAJOR); | |
5684 | shift = partitioned ? MdpMinorShift : 0; | |
5685 | unit = MINOR(mddev->unit) >> shift; | |
efeb53c0 | 5686 | |
039b7225 | 5687 | if (name && !dev) { |
efeb53c0 N |
5688 | /* Need to ensure that 'name' is not a duplicate. |
5689 | */ | |
fd01b88c | 5690 | struct mddev *mddev2; |
efeb53c0 N |
5691 | spin_lock(&all_mddevs_lock); |
5692 | ||
5693 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) | |
5694 | if (mddev2->gendisk && | |
5695 | strcmp(mddev2->gendisk->disk_name, name) == 0) { | |
5696 | spin_unlock(&all_mddevs_lock); | |
0d809b38 | 5697 | error = -EEXIST; |
0909dc44 | 5698 | goto abort; |
efeb53c0 N |
5699 | } |
5700 | spin_unlock(&all_mddevs_lock); | |
1da177e4 | 5701 | } |
039b7225 N |
5702 | if (name && dev) |
5703 | /* | |
5704 | * Creating /dev/mdNNN via "newarray", so adjust hold_active. | |
5705 | */ | |
5706 | mddev->hold_active = UNTIL_STOP; | |
8b765398 | 5707 | |
41d2d848 AP |
5708 | error = mempool_init_kmalloc_pool(&mddev->md_io_pool, BIO_POOL_SIZE, |
5709 | sizeof(struct md_io)); | |
5710 | if (error) | |
5711 | goto abort; | |
5712 | ||
0909dc44 | 5713 | error = -ENOMEM; |
c62b37d9 | 5714 | mddev->queue = blk_alloc_queue(NUMA_NO_NODE); |
0909dc44 N |
5715 | if (!mddev->queue) |
5716 | goto abort; | |
409c57f3 | 5717 | |
b1bd055d | 5718 | blk_set_stacking_limits(&mddev->queue->limits); |
8b765398 | 5719 | |
1da177e4 LT |
5720 | disk = alloc_disk(1 << shift); |
5721 | if (!disk) { | |
8b765398 N |
5722 | blk_cleanup_queue(mddev->queue); |
5723 | mddev->queue = NULL; | |
0909dc44 | 5724 | goto abort; |
1da177e4 | 5725 | } |
efeb53c0 | 5726 | disk->major = MAJOR(mddev->unit); |
1da177e4 | 5727 | disk->first_minor = unit << shift; |
efeb53c0 N |
5728 | if (name) |
5729 | strcpy(disk->disk_name, name); | |
5730 | else if (partitioned) | |
1da177e4 | 5731 | sprintf(disk->disk_name, "md_d%d", unit); |
ce7b0f46 | 5732 | else |
1da177e4 | 5733 | sprintf(disk->disk_name, "md%d", unit); |
1da177e4 LT |
5734 | disk->fops = &md_fops; |
5735 | disk->private_data = mddev; | |
5736 | disk->queue = mddev->queue; | |
56883a7e | 5737 | blk_queue_write_cache(mddev->queue, true, true); |
92850bbd | 5738 | /* Allow extended partitions. This makes the |
d3374825 | 5739 | * 'mdp' device redundant, but we can't really |
92850bbd N |
5740 | * remove it now. |
5741 | */ | |
5742 | disk->flags |= GENHD_FL_EXT_DEVT; | |
a564e23f | 5743 | disk->events |= DISK_EVENT_MEDIA_CHANGE; |
1da177e4 | 5744 | mddev->gendisk = disk; |
b0140891 N |
5745 | /* As soon as we call add_disk(), another thread could get |
5746 | * through to md_open, so make sure it doesn't get too far | |
5747 | */ | |
5748 | mutex_lock(&mddev->open_mutex); | |
5749 | add_disk(disk); | |
5750 | ||
28dec870 | 5751 | error = kobject_add(&mddev->kobj, &disk_to_dev(disk)->kobj, "%s", "md"); |
0909dc44 N |
5752 | if (error) { |
5753 | /* This isn't possible, but as kobject_init_and_add is marked | |
5754 | * __must_check, we must do something with the result | |
5755 | */ | |
9d48739e N |
5756 | pr_debug("md: cannot register %s/md - name in use\n", |
5757 | disk->disk_name); | |
0909dc44 N |
5758 | error = 0; |
5759 | } | |
00bcb4ac N |
5760 | if (mddev->kobj.sd && |
5761 | sysfs_create_group(&mddev->kobj, &md_bitmap_group)) | |
9d48739e | 5762 | pr_debug("pointless warning\n"); |
b0140891 | 5763 | mutex_unlock(&mddev->open_mutex); |
0909dc44 N |
5764 | abort: |
5765 | mutex_unlock(&disks_mutex); | |
00bcb4ac | 5766 | if (!error && mddev->kobj.sd) { |
3830c62f | 5767 | kobject_uevent(&mddev->kobj, KOBJ_ADD); |
00bcb4ac | 5768 | mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state"); |
e1a86dbb | 5769 | mddev->sysfs_level = sysfs_get_dirent_safe(mddev->kobj.sd, "level"); |
b62b7590 | 5770 | } |
d3374825 | 5771 | mddev_put(mddev); |
0909dc44 | 5772 | return error; |
efeb53c0 N |
5773 | } |
5774 | ||
28144f99 | 5775 | static void md_probe(dev_t dev) |
efeb53c0 | 5776 | { |
28144f99 CH |
5777 | if (MAJOR(dev) == MD_MAJOR && MINOR(dev) >= 512) |
5778 | return; | |
78b6350d N |
5779 | if (create_on_open) |
5780 | md_alloc(dev, NULL); | |
1da177e4 LT |
5781 | } |
5782 | ||
e4dca7b7 | 5783 | static int add_named_array(const char *val, const struct kernel_param *kp) |
efeb53c0 | 5784 | { |
039b7225 N |
5785 | /* |
5786 | * val must be "md_*" or "mdNNN". | |
5787 | * For "md_*" we allocate an array with a large free minor number, and | |
efeb53c0 | 5788 | * set the name to val. val must not already be an active name. |
039b7225 N |
5789 | * For "mdNNN" we allocate an array with the minor number NNN |
5790 | * which must not already be in use. | |
efeb53c0 N |
5791 | */ |
5792 | int len = strlen(val); | |
5793 | char buf[DISK_NAME_LEN]; | |
039b7225 | 5794 | unsigned long devnum; |
efeb53c0 N |
5795 | |
5796 | while (len && val[len-1] == '\n') | |
5797 | len--; | |
5798 | if (len >= DISK_NAME_LEN) | |
5799 | return -E2BIG; | |
5800 | strlcpy(buf, val, len+1); | |
039b7225 N |
5801 | if (strncmp(buf, "md_", 3) == 0) |
5802 | return md_alloc(0, buf); | |
5803 | if (strncmp(buf, "md", 2) == 0 && | |
5804 | isdigit(buf[2]) && | |
5805 | kstrtoul(buf+2, 10, &devnum) == 0 && | |
5806 | devnum <= MINORMASK) | |
5807 | return md_alloc(MKDEV(MD_MAJOR, devnum), NULL); | |
5808 | ||
5809 | return -EINVAL; | |
efeb53c0 N |
5810 | } |
5811 | ||
8376d3c1 | 5812 | static void md_safemode_timeout(struct timer_list *t) |
1da177e4 | 5813 | { |
8376d3c1 | 5814 | struct mddev *mddev = from_timer(mddev, t, safemode_timer); |
1da177e4 | 5815 | |
4ad23a97 N |
5816 | mddev->safemode = 1; |
5817 | if (mddev->external) | |
5818 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
5819 | ||
1da177e4 LT |
5820 | md_wakeup_thread(mddev->thread); |
5821 | } | |
5822 | ||
6ff8d8ec | 5823 | static int start_dirty_degraded; |
1da177e4 | 5824 | |
fd01b88c | 5825 | int md_run(struct mddev *mddev) |
1da177e4 | 5826 | { |
2604b703 | 5827 | int err; |
3cb03002 | 5828 | struct md_rdev *rdev; |
84fc4b56 | 5829 | struct md_personality *pers; |
1da177e4 | 5830 | |
a757e64c N |
5831 | if (list_empty(&mddev->disks)) |
5832 | /* cannot run an array with no devices.. */ | |
1da177e4 | 5833 | return -EINVAL; |
1da177e4 LT |
5834 | |
5835 | if (mddev->pers) | |
5836 | return -EBUSY; | |
bb4f1e9d N |
5837 | /* Cannot run until previous stop completes properly */ |
5838 | if (mddev->sysfs_active) | |
5839 | return -EBUSY; | |
b6eb127d | 5840 | |
1da177e4 LT |
5841 | /* |
5842 | * Analyze all RAID superblock(s) | |
5843 | */ | |
1ec4a939 N |
5844 | if (!mddev->raid_disks) { |
5845 | if (!mddev->persistent) | |
5846 | return -EINVAL; | |
6a5cb53a YY |
5847 | err = analyze_sbs(mddev); |
5848 | if (err) | |
5849 | return -EINVAL; | |
1ec4a939 | 5850 | } |
1da177e4 | 5851 | |
d9d166c2 N |
5852 | if (mddev->level != LEVEL_NONE) |
5853 | request_module("md-level-%d", mddev->level); | |
5854 | else if (mddev->clevel[0]) | |
5855 | request_module("md-%s", mddev->clevel); | |
1da177e4 LT |
5856 | |
5857 | /* | |
5858 | * Drop all container device buffers, from now on | |
5859 | * the only valid external interface is through the md | |
5860 | * device. | |
1da177e4 | 5861 | */ |
4b6c1060 | 5862 | mddev->has_superblocks = false; |
dafb20fa | 5863 | rdev_for_each(rdev, mddev) { |
b2d444d7 | 5864 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
5865 | continue; |
5866 | sync_blockdev(rdev->bdev); | |
f98393a6 | 5867 | invalidate_bdev(rdev->bdev); |
d7a47838 | 5868 | if (mddev->ro != 1 && rdev_read_only(rdev)) { |
97b20ef7 N |
5869 | mddev->ro = 1; |
5870 | if (mddev->gendisk) | |
5871 | set_disk_ro(mddev->gendisk, 1); | |
5872 | } | |
f0d76d70 | 5873 | |
4b6c1060 HM |
5874 | if (rdev->sb_page) |
5875 | mddev->has_superblocks = true; | |
5876 | ||
f0d76d70 N |
5877 | /* perform some consistency tests on the device. |
5878 | * We don't want the data to overlap the metadata, | |
58c0fed4 | 5879 | * Internal Bitmap issues have been handled elsewhere. |
f0d76d70 | 5880 | */ |
a6ff7e08 JB |
5881 | if (rdev->meta_bdev) { |
5882 | /* Nothing to check */; | |
5883 | } else if (rdev->data_offset < rdev->sb_start) { | |
58c0fed4 AN |
5884 | if (mddev->dev_sectors && |
5885 | rdev->data_offset + mddev->dev_sectors | |
0f420358 | 5886 | > rdev->sb_start) { |
9d48739e N |
5887 | pr_warn("md: %s: data overlaps metadata\n", |
5888 | mdname(mddev)); | |
f0d76d70 N |
5889 | return -EINVAL; |
5890 | } | |
5891 | } else { | |
0f420358 | 5892 | if (rdev->sb_start + rdev->sb_size/512 |
f0d76d70 | 5893 | > rdev->data_offset) { |
9d48739e N |
5894 | pr_warn("md: %s: metadata overlaps data\n", |
5895 | mdname(mddev)); | |
f0d76d70 N |
5896 | return -EINVAL; |
5897 | } | |
5898 | } | |
00bcb4ac | 5899 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
5900 | } |
5901 | ||
afeee514 KO |
5902 | if (!bioset_initialized(&mddev->bio_set)) { |
5903 | err = bioset_init(&mddev->bio_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5904 | if (err) | |
5905 | return err; | |
10273170 | 5906 | } |
afeee514 KO |
5907 | if (!bioset_initialized(&mddev->sync_set)) { |
5908 | err = bioset_init(&mddev->sync_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5909 | if (err) | |
28dec870 | 5910 | return err; |
5a85071c | 5911 | } |
a167f663 | 5912 | |
1da177e4 | 5913 | spin_lock(&pers_lock); |
d9d166c2 | 5914 | pers = find_pers(mddev->level, mddev->clevel); |
2604b703 | 5915 | if (!pers || !try_module_get(pers->owner)) { |
1da177e4 | 5916 | spin_unlock(&pers_lock); |
d9d166c2 | 5917 | if (mddev->level != LEVEL_NONE) |
9d48739e N |
5918 | pr_warn("md: personality for level %d is not loaded!\n", |
5919 | mddev->level); | |
d9d166c2 | 5920 | else |
9d48739e N |
5921 | pr_warn("md: personality for level %s is not loaded!\n", |
5922 | mddev->clevel); | |
bfc9dfdc SL |
5923 | err = -EINVAL; |
5924 | goto abort; | |
1da177e4 | 5925 | } |
1da177e4 | 5926 | spin_unlock(&pers_lock); |
34817e8c N |
5927 | if (mddev->level != pers->level) { |
5928 | mddev->level = pers->level; | |
5929 | mddev->new_level = pers->level; | |
5930 | } | |
d9d166c2 | 5931 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
1da177e4 | 5932 | |
f6705578 | 5933 | if (mddev->reshape_position != MaxSector && |
63c70c4f | 5934 | pers->start_reshape == NULL) { |
f6705578 | 5935 | /* This personality cannot handle reshaping... */ |
f6705578 | 5936 | module_put(pers->owner); |
bfc9dfdc SL |
5937 | err = -EINVAL; |
5938 | goto abort; | |
f6705578 N |
5939 | } |
5940 | ||
7dd5e7c3 N |
5941 | if (pers->sync_request) { |
5942 | /* Warn if this is a potentially silly | |
5943 | * configuration. | |
5944 | */ | |
5945 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 5946 | struct md_rdev *rdev2; |
7dd5e7c3 | 5947 | int warned = 0; |
159ec1fc | 5948 | |
dafb20fa N |
5949 | rdev_for_each(rdev, mddev) |
5950 | rdev_for_each(rdev2, mddev) { | |
7dd5e7c3 | 5951 | if (rdev < rdev2 && |
61a27e1f CH |
5952 | rdev->bdev->bd_disk == |
5953 | rdev2->bdev->bd_disk) { | |
9d48739e N |
5954 | pr_warn("%s: WARNING: %s appears to be on the same physical disk as %s.\n", |
5955 | mdname(mddev), | |
5956 | bdevname(rdev->bdev,b), | |
5957 | bdevname(rdev2->bdev,b2)); | |
7dd5e7c3 N |
5958 | warned = 1; |
5959 | } | |
5960 | } | |
159ec1fc | 5961 | |
7dd5e7c3 | 5962 | if (warned) |
9d48739e | 5963 | pr_warn("True protection against single-disk failure might be compromised.\n"); |
7dd5e7c3 N |
5964 | } |
5965 | ||
657390d2 | 5966 | mddev->recovery = 0; |
58c0fed4 AN |
5967 | /* may be over-ridden by personality */ |
5968 | mddev->resync_max_sectors = mddev->dev_sectors; | |
5969 | ||
6ff8d8ec | 5970 | mddev->ok_start_degraded = start_dirty_degraded; |
1da177e4 | 5971 | |
0f9552b5 | 5972 | if (start_readonly && mddev->ro == 0) |
f91de92e N |
5973 | mddev->ro = 2; /* read-only, but switch on first write */ |
5974 | ||
36d091f4 | 5975 | err = pers->run(mddev); |
13e53df3 | 5976 | if (err) |
9d48739e | 5977 | pr_warn("md: pers->run() failed ...\n"); |
36d091f4 | 5978 | else if (pers->size(mddev, 0, 0) < mddev->array_sectors) { |
9d48739e N |
5979 | WARN_ONCE(!mddev->external_size, |
5980 | "%s: default size too small, but 'external_size' not in effect?\n", | |
5981 | __func__); | |
5982 | pr_warn("md: invalid array_size %llu > default size %llu\n", | |
5983 | (unsigned long long)mddev->array_sectors / 2, | |
5984 | (unsigned long long)pers->size(mddev, 0, 0) / 2); | |
b522adcd | 5985 | err = -EINVAL; |
b522adcd | 5986 | } |
36d091f4 | 5987 | if (err == 0 && pers->sync_request && |
ef99bf48 | 5988 | (mddev->bitmap_info.file || mddev->bitmap_info.offset)) { |
f9209a32 GR |
5989 | struct bitmap *bitmap; |
5990 | ||
e64e4018 | 5991 | bitmap = md_bitmap_create(mddev, -1); |
f9209a32 GR |
5992 | if (IS_ERR(bitmap)) { |
5993 | err = PTR_ERR(bitmap); | |
9d48739e N |
5994 | pr_warn("%s: failed to create bitmap (%d)\n", |
5995 | mdname(mddev), err); | |
f9209a32 GR |
5996 | } else |
5997 | mddev->bitmap = bitmap; | |
5998 | ||
b15c2e57 | 5999 | } |
d494549a GJ |
6000 | if (err) |
6001 | goto bitmap_abort; | |
3e148a32 GJ |
6002 | |
6003 | if (mddev->bitmap_info.max_write_behind > 0) { | |
3e173ab5 | 6004 | bool create_pool = false; |
3e148a32 GJ |
6005 | |
6006 | rdev_for_each(rdev, mddev) { | |
6007 | if (test_bit(WriteMostly, &rdev->flags) && | |
404659cf | 6008 | rdev_init_serial(rdev)) |
3e173ab5 | 6009 | create_pool = true; |
3e148a32 | 6010 | } |
3e173ab5 | 6011 | if (create_pool && mddev->serial_info_pool == NULL) { |
404659cf GJ |
6012 | mddev->serial_info_pool = |
6013 | mempool_create_kmalloc_pool(NR_SERIAL_INFOS, | |
6014 | sizeof(struct serial_info)); | |
6015 | if (!mddev->serial_info_pool) { | |
3e148a32 | 6016 | err = -ENOMEM; |
d494549a | 6017 | goto bitmap_abort; |
3e148a32 GJ |
6018 | } |
6019 | } | |
6020 | } | |
6021 | ||
5c675f83 | 6022 | if (mddev->queue) { |
bb086a89 SL |
6023 | bool nonrot = true; |
6024 | ||
6025 | rdev_for_each(rdev, mddev) { | |
6026 | if (rdev->raid_disk >= 0 && | |
6027 | !blk_queue_nonrot(bdev_get_queue(rdev->bdev))) { | |
6028 | nonrot = false; | |
6029 | break; | |
6030 | } | |
6031 | } | |
6032 | if (mddev->degraded) | |
6033 | nonrot = false; | |
6034 | if (nonrot) | |
8b904b5b | 6035 | blk_queue_flag_set(QUEUE_FLAG_NONROT, mddev->queue); |
bb086a89 | 6036 | else |
8b904b5b | 6037 | blk_queue_flag_clear(QUEUE_FLAG_NONROT, mddev->queue); |
5c675f83 | 6038 | } |
36d091f4 | 6039 | if (pers->sync_request) { |
00bcb4ac N |
6040 | if (mddev->kobj.sd && |
6041 | sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
6042 | pr_warn("md: cannot register extra attributes for %s\n", |
6043 | mdname(mddev)); | |
00bcb4ac | 6044 | mddev->sysfs_action = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_action"); |
e8efa9b8 JB |
6045 | mddev->sysfs_completed = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_completed"); |
6046 | mddev->sysfs_degraded = sysfs_get_dirent_safe(mddev->kobj.sd, "degraded"); | |
5e55e2f5 | 6047 | } else if (mddev->ro == 2) /* auto-readonly not meaningful */ |
fd9d49ca N |
6048 | mddev->ro = 0; |
6049 | ||
1e50915f RB |
6050 | atomic_set(&mddev->max_corr_read_errors, |
6051 | MD_DEFAULT_MAX_CORRECTED_READ_ERRORS); | |
1da177e4 | 6052 | mddev->safemode = 0; |
28c1b9fd GR |
6053 | if (mddev_is_clustered(mddev)) |
6054 | mddev->safemode_delay = 0; | |
6055 | else | |
7c9d5c54 | 6056 | mddev->safemode_delay = DEFAULT_SAFEMODE_DELAY; |
1da177e4 | 6057 | mddev->in_sync = 1; |
0ca69886 | 6058 | smp_wmb(); |
36d091f4 N |
6059 | spin_lock(&mddev->lock); |
6060 | mddev->pers = pers; | |
36d091f4 | 6061 | spin_unlock(&mddev->lock); |
dafb20fa | 6062 | rdev_for_each(rdev, mddev) |
36fad858 | 6063 | if (rdev->raid_disk >= 0) |
e5b521ee | 6064 | sysfs_link_rdev(mddev, rdev); /* failure here is OK */ |
f72ffdd6 | 6065 | |
a4a3d26d N |
6066 | if (mddev->degraded && !mddev->ro) |
6067 | /* This ensures that recovering status is reported immediately | |
6068 | * via sysfs - until a lack of spares is confirmed. | |
6069 | */ | |
6070 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
1da177e4 | 6071 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f72ffdd6 | 6072 | |
2953079c | 6073 | if (mddev->sb_flags) |
850b2b42 | 6074 | md_update_sb(mddev, 0); |
1da177e4 | 6075 | |
d7603b7e | 6076 | md_new_event(mddev); |
1da177e4 | 6077 | return 0; |
b126194c | 6078 | |
d494549a GJ |
6079 | bitmap_abort: |
6080 | mddev_detach(mddev); | |
6081 | if (mddev->private) | |
6082 | pers->free(mddev, mddev->private); | |
6083 | mddev->private = NULL; | |
6084 | module_put(pers->owner); | |
6085 | md_bitmap_destroy(mddev); | |
b126194c | 6086 | abort: |
4bc034d3 N |
6087 | bioset_exit(&mddev->bio_set); |
6088 | bioset_exit(&mddev->sync_set); | |
b126194c | 6089 | return err; |
1da177e4 | 6090 | } |
390ee602 | 6091 | EXPORT_SYMBOL_GPL(md_run); |
1da177e4 | 6092 | |
7e0adbfc | 6093 | int do_md_run(struct mddev *mddev) |
fe60b014 N |
6094 | { |
6095 | int err; | |
6096 | ||
9d4b45d6 | 6097 | set_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
6098 | err = md_run(mddev); |
6099 | if (err) | |
6100 | goto out; | |
e64e4018 | 6101 | err = md_bitmap_load(mddev); |
69e51b44 | 6102 | if (err) { |
e64e4018 | 6103 | md_bitmap_destroy(mddev); |
69e51b44 N |
6104 | goto out; |
6105 | } | |
0fd018af | 6106 | |
28c1b9fd GR |
6107 | if (mddev_is_clustered(mddev)) |
6108 | md_allow_write(mddev); | |
6109 | ||
d5d885fd SL |
6110 | /* run start up tasks that require md_thread */ |
6111 | md_start(mddev); | |
6112 | ||
0fd018af JB |
6113 | md_wakeup_thread(mddev->thread); |
6114 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
6115 | ||
2c247c51 | 6116 | set_capacity_and_notify(mddev->gendisk, mddev->array_sectors); |
9d4b45d6 | 6117 | clear_bit(MD_NOT_READY, &mddev->flags); |
f0b4f7e2 | 6118 | mddev->changed = 1; |
fe60b014 | 6119 | kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); |
9d4b45d6 N |
6120 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6121 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
e1a86dbb | 6122 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
fe60b014 | 6123 | out: |
9d4b45d6 | 6124 | clear_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
6125 | return err; |
6126 | } | |
6127 | ||
d5d885fd SL |
6128 | int md_start(struct mddev *mddev) |
6129 | { | |
6130 | int ret = 0; | |
6131 | ||
6132 | if (mddev->pers->start) { | |
6133 | set_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
6134 | md_wakeup_thread(mddev->thread); | |
6135 | ret = mddev->pers->start(mddev); | |
6136 | clear_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
6137 | md_wakeup_thread(mddev->sync_thread); | |
6138 | } | |
6139 | return ret; | |
6140 | } | |
6141 | EXPORT_SYMBOL_GPL(md_start); | |
6142 | ||
fd01b88c | 6143 | static int restart_array(struct mddev *mddev) |
1da177e4 LT |
6144 | { |
6145 | struct gendisk *disk = mddev->gendisk; | |
97b20ef7 N |
6146 | struct md_rdev *rdev; |
6147 | bool has_journal = false; | |
6148 | bool has_readonly = false; | |
1da177e4 | 6149 | |
80fab1d7 | 6150 | /* Complain if it has no devices */ |
1da177e4 | 6151 | if (list_empty(&mddev->disks)) |
80fab1d7 AN |
6152 | return -ENXIO; |
6153 | if (!mddev->pers) | |
6154 | return -EINVAL; | |
6155 | if (!mddev->ro) | |
6156 | return -EBUSY; | |
339421de | 6157 | |
97b20ef7 N |
6158 | rcu_read_lock(); |
6159 | rdev_for_each_rcu(rdev, mddev) { | |
6160 | if (test_bit(Journal, &rdev->flags) && | |
6161 | !test_bit(Faulty, &rdev->flags)) | |
6162 | has_journal = true; | |
a42e0d70 | 6163 | if (rdev_read_only(rdev)) |
97b20ef7 N |
6164 | has_readonly = true; |
6165 | } | |
6166 | rcu_read_unlock(); | |
6167 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags) && !has_journal) | |
339421de | 6168 | /* Don't restart rw with journal missing/faulty */ |
339421de | 6169 | return -EINVAL; |
97b20ef7 N |
6170 | if (has_readonly) |
6171 | return -EROFS; | |
339421de | 6172 | |
80fab1d7 AN |
6173 | mddev->safemode = 0; |
6174 | mddev->ro = 0; | |
6175 | set_disk_ro(disk, 0); | |
9d48739e | 6176 | pr_debug("md: %s switched to read-write mode.\n", mdname(mddev)); |
80fab1d7 AN |
6177 | /* Kick recovery or resync if necessary */ |
6178 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6179 | md_wakeup_thread(mddev->thread); | |
6180 | md_wakeup_thread(mddev->sync_thread); | |
00bcb4ac | 6181 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
80fab1d7 | 6182 | return 0; |
1da177e4 LT |
6183 | } |
6184 | ||
fd01b88c | 6185 | static void md_clean(struct mddev *mddev) |
6177b472 N |
6186 | { |
6187 | mddev->array_sectors = 0; | |
6188 | mddev->external_size = 0; | |
6189 | mddev->dev_sectors = 0; | |
6190 | mddev->raid_disks = 0; | |
6191 | mddev->recovery_cp = 0; | |
6192 | mddev->resync_min = 0; | |
6193 | mddev->resync_max = MaxSector; | |
6194 | mddev->reshape_position = MaxSector; | |
6195 | mddev->external = 0; | |
6196 | mddev->persistent = 0; | |
6197 | mddev->level = LEVEL_NONE; | |
6198 | mddev->clevel[0] = 0; | |
6199 | mddev->flags = 0; | |
2953079c | 6200 | mddev->sb_flags = 0; |
6177b472 N |
6201 | mddev->ro = 0; |
6202 | mddev->metadata_type[0] = 0; | |
6203 | mddev->chunk_sectors = 0; | |
6204 | mddev->ctime = mddev->utime = 0; | |
6205 | mddev->layout = 0; | |
6206 | mddev->max_disks = 0; | |
6207 | mddev->events = 0; | |
a8707c08 | 6208 | mddev->can_decrease_events = 0; |
6177b472 | 6209 | mddev->delta_disks = 0; |
2c810cdd | 6210 | mddev->reshape_backwards = 0; |
6177b472 N |
6211 | mddev->new_level = LEVEL_NONE; |
6212 | mddev->new_layout = 0; | |
6213 | mddev->new_chunk_sectors = 0; | |
6214 | mddev->curr_resync = 0; | |
7f7583d4 | 6215 | atomic64_set(&mddev->resync_mismatches, 0); |
6177b472 N |
6216 | mddev->suspend_lo = mddev->suspend_hi = 0; |
6217 | mddev->sync_speed_min = mddev->sync_speed_max = 0; | |
6218 | mddev->recovery = 0; | |
6219 | mddev->in_sync = 0; | |
f0b4f7e2 | 6220 | mddev->changed = 0; |
6177b472 | 6221 | mddev->degraded = 0; |
6177b472 | 6222 | mddev->safemode = 0; |
bd691922 | 6223 | mddev->private = NULL; |
c20c33f0 | 6224 | mddev->cluster_info = NULL; |
6177b472 N |
6225 | mddev->bitmap_info.offset = 0; |
6226 | mddev->bitmap_info.default_offset = 0; | |
6409bb05 | 6227 | mddev->bitmap_info.default_space = 0; |
6177b472 N |
6228 | mddev->bitmap_info.chunksize = 0; |
6229 | mddev->bitmap_info.daemon_sleep = 0; | |
6230 | mddev->bitmap_info.max_write_behind = 0; | |
c20c33f0 | 6231 | mddev->bitmap_info.nodes = 0; |
6177b472 N |
6232 | } |
6233 | ||
fd01b88c | 6234 | static void __md_stop_writes(struct mddev *mddev) |
a047e125 | 6235 | { |
6b6204ee | 6236 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
21e0958e GJ |
6237 | if (work_pending(&mddev->del_work)) |
6238 | flush_workqueue(md_misc_wq); | |
a047e125 | 6239 | if (mddev->sync_thread) { |
a047e125 | 6240 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
a91d5ac0 | 6241 | md_reap_sync_thread(mddev); |
a047e125 N |
6242 | } |
6243 | ||
6244 | del_timer_sync(&mddev->safemode_timer); | |
6245 | ||
034e33f5 SL |
6246 | if (mddev->pers && mddev->pers->quiesce) { |
6247 | mddev->pers->quiesce(mddev, 1); | |
6248 | mddev->pers->quiesce(mddev, 0); | |
6249 | } | |
e64e4018 | 6250 | md_bitmap_flush(mddev); |
a047e125 | 6251 | |
b6d428c6 | 6252 | if (mddev->ro == 0 && |
28c1b9fd | 6253 | ((!mddev->in_sync && !mddev_is_clustered(mddev)) || |
2953079c | 6254 | mddev->sb_flags)) { |
a047e125 | 6255 | /* mark array as shutdown cleanly */ |
28c1b9fd GR |
6256 | if (!mddev_is_clustered(mddev)) |
6257 | mddev->in_sync = 1; | |
a047e125 N |
6258 | md_update_sb(mddev, 1); |
6259 | } | |
69b00b5b GJ |
6260 | /* disable policy to guarantee rdevs free resources for serialization */ |
6261 | mddev->serialize_policy = 0; | |
6262 | mddev_destroy_serial_pool(mddev, NULL, true); | |
a047e125 | 6263 | } |
defad61a | 6264 | |
fd01b88c | 6265 | void md_stop_writes(struct mddev *mddev) |
defad61a | 6266 | { |
29f097c4 | 6267 | mddev_lock_nointr(mddev); |
defad61a N |
6268 | __md_stop_writes(mddev); |
6269 | mddev_unlock(mddev); | |
6270 | } | |
390ee602 | 6271 | EXPORT_SYMBOL_GPL(md_stop_writes); |
a047e125 | 6272 | |
5aa61f42 N |
6273 | static void mddev_detach(struct mddev *mddev) |
6274 | { | |
e64e4018 | 6275 | md_bitmap_wait_behind_writes(mddev); |
6b40bec3 | 6276 | if (mddev->pers && mddev->pers->quiesce && !mddev->suspended) { |
5aa61f42 N |
6277 | mddev->pers->quiesce(mddev, 1); |
6278 | mddev->pers->quiesce(mddev, 0); | |
6279 | } | |
6280 | md_unregister_thread(&mddev->thread); | |
6281 | if (mddev->queue) | |
6282 | blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ | |
6283 | } | |
6284 | ||
5eff3c43 | 6285 | static void __md_stop(struct mddev *mddev) |
6177b472 | 6286 | { |
36d091f4 | 6287 | struct md_personality *pers = mddev->pers; |
e64e4018 | 6288 | md_bitmap_destroy(mddev); |
5aa61f42 | 6289 | mddev_detach(mddev); |
ee5d004f | 6290 | /* Ensure ->event_work is done */ |
21e0958e GJ |
6291 | if (mddev->event_work.func) |
6292 | flush_workqueue(md_misc_wq); | |
36d091f4 | 6293 | spin_lock(&mddev->lock); |
6177b472 | 6294 | mddev->pers = NULL; |
36d091f4 N |
6295 | spin_unlock(&mddev->lock); |
6296 | pers->free(mddev, mddev->private); | |
bd691922 | 6297 | mddev->private = NULL; |
36d091f4 N |
6298 | if (pers->sync_request && mddev->to_remove == NULL) |
6299 | mddev->to_remove = &md_redundancy_group; | |
6300 | module_put(pers->owner); | |
cca9cf90 | 6301 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
6aaa58c9 JW |
6302 | } |
6303 | ||
6304 | void md_stop(struct mddev *mddev) | |
6305 | { | |
6306 | /* stop the array and free an attached data structures. | |
6307 | * This is called from dm-raid | |
6308 | */ | |
6309 | __md_stop(mddev); | |
afeee514 KO |
6310 | bioset_exit(&mddev->bio_set); |
6311 | bioset_exit(&mddev->sync_set); | |
5eff3c43 N |
6312 | } |
6313 | ||
390ee602 | 6314 | EXPORT_SYMBOL_GPL(md_stop); |
6177b472 | 6315 | |
a05b7ea0 | 6316 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) |
a4bd82d0 N |
6317 | { |
6318 | int err = 0; | |
30b8feb7 N |
6319 | int did_freeze = 0; |
6320 | ||
6321 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6322 | did_freeze = 1; | |
6323 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6324 | md_wakeup_thread(mddev->thread); | |
6325 | } | |
f851b60d | 6326 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6327 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6328 | if (mddev->sync_thread) |
30b8feb7 N |
6329 | /* Thread might be blocked waiting for metadata update |
6330 | * which will now never happen */ | |
6331 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6332 | |
2953079c | 6333 | if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
88724bfa | 6334 | return -EBUSY; |
30b8feb7 | 6335 | mddev_unlock(mddev); |
f851b60d N |
6336 | wait_event(resync_wait, !test_bit(MD_RECOVERY_RUNNING, |
6337 | &mddev->recovery)); | |
88724bfa | 6338 | wait_event(mddev->sb_wait, |
2953079c | 6339 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
30b8feb7 N |
6340 | mddev_lock_nointr(mddev); |
6341 | ||
a4bd82d0 | 6342 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6343 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 | 6344 | mddev->sync_thread || |
af8d8e6f | 6345 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6346 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
30b8feb7 N |
6347 | if (did_freeze) { |
6348 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6349 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6350 | md_wakeup_thread(mddev->thread); |
6351 | } | |
a4bd82d0 N |
6352 | err = -EBUSY; |
6353 | goto out; | |
6354 | } | |
6355 | if (mddev->pers) { | |
defad61a | 6356 | __md_stop_writes(mddev); |
a4bd82d0 N |
6357 | |
6358 | err = -ENXIO; | |
6359 | if (mddev->ro==1) | |
6360 | goto out; | |
6361 | mddev->ro = 1; | |
6362 | set_disk_ro(mddev->gendisk, 1); | |
6363 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d N |
6364 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
6365 | md_wakeup_thread(mddev->thread); | |
00bcb4ac | 6366 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
30b8feb7 | 6367 | err = 0; |
a4bd82d0 N |
6368 | } |
6369 | out: | |
6370 | mutex_unlock(&mddev->open_mutex); | |
6371 | return err; | |
6372 | } | |
6373 | ||
9e653b63 N |
6374 | /* mode: |
6375 | * 0 - completely stop and dis-assemble array | |
9e653b63 N |
6376 | * 2 - stop but do not disassemble array |
6377 | */ | |
f72ffdd6 | 6378 | static int do_md_stop(struct mddev *mddev, int mode, |
a05b7ea0 | 6379 | struct block_device *bdev) |
1da177e4 | 6380 | { |
1da177e4 | 6381 | struct gendisk *disk = mddev->gendisk; |
3cb03002 | 6382 | struct md_rdev *rdev; |
30b8feb7 N |
6383 | int did_freeze = 0; |
6384 | ||
6385 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6386 | did_freeze = 1; | |
6387 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6388 | md_wakeup_thread(mddev->thread); | |
6389 | } | |
f851b60d | 6390 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6391 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6392 | if (mddev->sync_thread) |
30b8feb7 N |
6393 | /* Thread might be blocked waiting for metadata update |
6394 | * which will now never happen */ | |
6395 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6396 | |
30b8feb7 | 6397 | mddev_unlock(mddev); |
f851b60d N |
6398 | wait_event(resync_wait, (mddev->sync_thread == NULL && |
6399 | !test_bit(MD_RECOVERY_RUNNING, | |
6400 | &mddev->recovery))); | |
30b8feb7 | 6401 | mddev_lock_nointr(mddev); |
1da177e4 | 6402 | |
c8c00a69 | 6403 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6404 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 N |
6405 | mddev->sysfs_active || |
6406 | mddev->sync_thread || | |
af8d8e6f | 6407 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6408 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
6e17b027 | 6409 | mutex_unlock(&mddev->open_mutex); |
30b8feb7 N |
6410 | if (did_freeze) { |
6411 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6412 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6413 | md_wakeup_thread(mddev->thread); |
6414 | } | |
260fa034 N |
6415 | return -EBUSY; |
6416 | } | |
6e17b027 | 6417 | if (mddev->pers) { |
a4bd82d0 N |
6418 | if (mddev->ro) |
6419 | set_disk_ro(disk, 0); | |
409c57f3 | 6420 | |
defad61a | 6421 | __md_stop_writes(mddev); |
5eff3c43 | 6422 | __md_stop(mddev); |
6177b472 | 6423 | |
a4bd82d0 | 6424 | /* tell userspace to handle 'inactive' */ |
00bcb4ac | 6425 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0d4ca600 | 6426 | |
dafb20fa | 6427 | rdev_for_each(rdev, mddev) |
36fad858 NK |
6428 | if (rdev->raid_disk >= 0) |
6429 | sysfs_unlink_rdev(mddev, rdev); | |
c4647292 | 6430 | |
2c247c51 | 6431 | set_capacity_and_notify(disk, 0); |
6e17b027 | 6432 | mutex_unlock(&mddev->open_mutex); |
f0b4f7e2 | 6433 | mddev->changed = 1; |
0d4ca600 | 6434 | |
a4bd82d0 N |
6435 | if (mddev->ro) |
6436 | mddev->ro = 0; | |
6e17b027 N |
6437 | } else |
6438 | mutex_unlock(&mddev->open_mutex); | |
1da177e4 LT |
6439 | /* |
6440 | * Free resources if final stop | |
6441 | */ | |
9e653b63 | 6442 | if (mode == 0) { |
9d48739e | 6443 | pr_info("md: %s stopped.\n", mdname(mddev)); |
1da177e4 | 6444 | |
c3d9714e | 6445 | if (mddev->bitmap_info.file) { |
4af1a041 N |
6446 | struct file *f = mddev->bitmap_info.file; |
6447 | spin_lock(&mddev->lock); | |
c3d9714e | 6448 | mddev->bitmap_info.file = NULL; |
4af1a041 N |
6449 | spin_unlock(&mddev->lock); |
6450 | fput(f); | |
978f946b | 6451 | } |
c3d9714e | 6452 | mddev->bitmap_info.offset = 0; |
978f946b | 6453 | |
1da177e4 LT |
6454 | export_array(mddev); |
6455 | ||
6177b472 | 6456 | md_clean(mddev); |
efeb53c0 N |
6457 | if (mddev->hold_active == UNTIL_STOP) |
6458 | mddev->hold_active = 0; | |
a4bd82d0 | 6459 | } |
d7603b7e | 6460 | md_new_event(mddev); |
00bcb4ac | 6461 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6e17b027 | 6462 | return 0; |
1da177e4 LT |
6463 | } |
6464 | ||
fdee8ae4 | 6465 | #ifndef MODULE |
fd01b88c | 6466 | static void autorun_array(struct mddev *mddev) |
1da177e4 | 6467 | { |
3cb03002 | 6468 | struct md_rdev *rdev; |
1da177e4 LT |
6469 | int err; |
6470 | ||
a757e64c | 6471 | if (list_empty(&mddev->disks)) |
1da177e4 | 6472 | return; |
1da177e4 | 6473 | |
9d48739e | 6474 | pr_info("md: running: "); |
1da177e4 | 6475 | |
dafb20fa | 6476 | rdev_for_each(rdev, mddev) { |
1da177e4 | 6477 | char b[BDEVNAME_SIZE]; |
9d48739e | 6478 | pr_cont("<%s>", bdevname(rdev->bdev,b)); |
1da177e4 | 6479 | } |
9d48739e | 6480 | pr_cont("\n"); |
1da177e4 | 6481 | |
d710e138 | 6482 | err = do_md_run(mddev); |
1da177e4 | 6483 | if (err) { |
9d48739e | 6484 | pr_warn("md: do_md_run() returned %d\n", err); |
a05b7ea0 | 6485 | do_md_stop(mddev, 0, NULL); |
1da177e4 LT |
6486 | } |
6487 | } | |
6488 | ||
6489 | /* | |
6490 | * lets try to run arrays based on all disks that have arrived | |
6491 | * until now. (those are in pending_raid_disks) | |
6492 | * | |
6493 | * the method: pick the first pending disk, collect all disks with | |
6494 | * the same UUID, remove all from the pending list and put them into | |
6495 | * the 'same_array' list. Then order this list based on superblock | |
6496 | * update time (freshest comes first), kick out 'old' disks and | |
6497 | * compare superblocks. If everything's fine then run it. | |
6498 | * | |
6499 | * If "unit" is allocated, then bump its reference count | |
6500 | */ | |
6501 | static void autorun_devices(int part) | |
6502 | { | |
3cb03002 | 6503 | struct md_rdev *rdev0, *rdev, *tmp; |
fd01b88c | 6504 | struct mddev *mddev; |
1da177e4 LT |
6505 | char b[BDEVNAME_SIZE]; |
6506 | ||
9d48739e | 6507 | pr_info("md: autorun ...\n"); |
1da177e4 | 6508 | while (!list_empty(&pending_raid_disks)) { |
e8703fe1 | 6509 | int unit; |
1da177e4 | 6510 | dev_t dev; |
ad01c9e3 | 6511 | LIST_HEAD(candidates); |
1da177e4 | 6512 | rdev0 = list_entry(pending_raid_disks.next, |
3cb03002 | 6513 | struct md_rdev, same_set); |
1da177e4 | 6514 | |
9d48739e | 6515 | pr_debug("md: considering %s ...\n", bdevname(rdev0->bdev,b)); |
1da177e4 | 6516 | INIT_LIST_HEAD(&candidates); |
159ec1fc | 6517 | rdev_for_each_list(rdev, tmp, &pending_raid_disks) |
1da177e4 | 6518 | if (super_90_load(rdev, rdev0, 0) >= 0) { |
9d48739e N |
6519 | pr_debug("md: adding %s ...\n", |
6520 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
6521 | list_move(&rdev->same_set, &candidates); |
6522 | } | |
6523 | /* | |
6524 | * now we have a set of devices, with all of them having | |
6525 | * mostly sane superblocks. It's time to allocate the | |
6526 | * mddev. | |
6527 | */ | |
e8703fe1 N |
6528 | if (part) { |
6529 | dev = MKDEV(mdp_major, | |
6530 | rdev0->preferred_minor << MdpMinorShift); | |
6531 | unit = MINOR(dev) >> MdpMinorShift; | |
6532 | } else { | |
6533 | dev = MKDEV(MD_MAJOR, rdev0->preferred_minor); | |
6534 | unit = MINOR(dev); | |
6535 | } | |
6536 | if (rdev0->preferred_minor != unit) { | |
9d48739e N |
6537 | pr_warn("md: unit number in %s is bad: %d\n", |
6538 | bdevname(rdev0->bdev, b), rdev0->preferred_minor); | |
1da177e4 LT |
6539 | break; |
6540 | } | |
1da177e4 | 6541 | |
28144f99 | 6542 | md_probe(dev); |
1da177e4 | 6543 | mddev = mddev_find(dev); |
65aa97c4 | 6544 | if (!mddev) |
1da177e4 | 6545 | break; |
65aa97c4 | 6546 | |
f72ffdd6 | 6547 | if (mddev_lock(mddev)) |
9d48739e | 6548 | pr_warn("md: %s locked, cannot run\n", mdname(mddev)); |
1da177e4 LT |
6549 | else if (mddev->raid_disks || mddev->major_version |
6550 | || !list_empty(&mddev->disks)) { | |
9d48739e | 6551 | pr_warn("md: %s already running, cannot run %s\n", |
1da177e4 LT |
6552 | mdname(mddev), bdevname(rdev0->bdev,b)); |
6553 | mddev_unlock(mddev); | |
6554 | } else { | |
9d48739e | 6555 | pr_debug("md: created %s\n", mdname(mddev)); |
1ec4a939 | 6556 | mddev->persistent = 1; |
159ec1fc | 6557 | rdev_for_each_list(rdev, tmp, &candidates) { |
1da177e4 LT |
6558 | list_del_init(&rdev->same_set); |
6559 | if (bind_rdev_to_array(rdev, mddev)) | |
6560 | export_rdev(rdev); | |
6561 | } | |
6562 | autorun_array(mddev); | |
6563 | mddev_unlock(mddev); | |
6564 | } | |
6565 | /* on success, candidates will be empty, on error | |
6566 | * it won't... | |
6567 | */ | |
159ec1fc | 6568 | rdev_for_each_list(rdev, tmp, &candidates) { |
4b80991c | 6569 | list_del_init(&rdev->same_set); |
1da177e4 | 6570 | export_rdev(rdev); |
4b80991c | 6571 | } |
1da177e4 LT |
6572 | mddev_put(mddev); |
6573 | } | |
9d48739e | 6574 | pr_info("md: ... autorun DONE.\n"); |
1da177e4 | 6575 | } |
fdee8ae4 | 6576 | #endif /* !MODULE */ |
1da177e4 | 6577 | |
f72ffdd6 | 6578 | static int get_version(void __user *arg) |
1da177e4 LT |
6579 | { |
6580 | mdu_version_t ver; | |
6581 | ||
6582 | ver.major = MD_MAJOR_VERSION; | |
6583 | ver.minor = MD_MINOR_VERSION; | |
6584 | ver.patchlevel = MD_PATCHLEVEL_VERSION; | |
6585 | ||
6586 | if (copy_to_user(arg, &ver, sizeof(ver))) | |
6587 | return -EFAULT; | |
6588 | ||
6589 | return 0; | |
6590 | } | |
6591 | ||
f72ffdd6 | 6592 | static int get_array_info(struct mddev *mddev, void __user *arg) |
1da177e4 LT |
6593 | { |
6594 | mdu_array_info_t info; | |
a9f326eb | 6595 | int nr,working,insync,failed,spare; |
3cb03002 | 6596 | struct md_rdev *rdev; |
1da177e4 | 6597 | |
1ca69c4b N |
6598 | nr = working = insync = failed = spare = 0; |
6599 | rcu_read_lock(); | |
6600 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 6601 | nr++; |
b2d444d7 | 6602 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
6603 | failed++; |
6604 | else { | |
6605 | working++; | |
b2d444d7 | 6606 | if (test_bit(In_sync, &rdev->flags)) |
f72ffdd6 | 6607 | insync++; |
b347af81 SL |
6608 | else if (test_bit(Journal, &rdev->flags)) |
6609 | /* TODO: add journal count to md_u.h */ | |
6610 | ; | |
1da177e4 LT |
6611 | else |
6612 | spare++; | |
6613 | } | |
6614 | } | |
1ca69c4b | 6615 | rcu_read_unlock(); |
1da177e4 LT |
6616 | |
6617 | info.major_version = mddev->major_version; | |
6618 | info.minor_version = mddev->minor_version; | |
6619 | info.patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6620 | info.ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 6621 | info.level = mddev->level; |
58c0fed4 AN |
6622 | info.size = mddev->dev_sectors / 2; |
6623 | if (info.size != mddev->dev_sectors / 2) /* overflow */ | |
284ae7ca | 6624 | info.size = -1; |
1da177e4 LT |
6625 | info.nr_disks = nr; |
6626 | info.raid_disks = mddev->raid_disks; | |
6627 | info.md_minor = mddev->md_minor; | |
6628 | info.not_persistent= !mddev->persistent; | |
6629 | ||
9ebc6ef1 | 6630 | info.utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
6631 | info.state = 0; |
6632 | if (mddev->in_sync) | |
6633 | info.state = (1<<MD_SB_CLEAN); | |
c3d9714e | 6634 | if (mddev->bitmap && mddev->bitmap_info.offset) |
9bd35920 | 6635 | info.state |= (1<<MD_SB_BITMAP_PRESENT); |
ca8895d9 GR |
6636 | if (mddev_is_clustered(mddev)) |
6637 | info.state |= (1<<MD_SB_CLUSTERED); | |
a9f326eb | 6638 | info.active_disks = insync; |
1da177e4 LT |
6639 | info.working_disks = working; |
6640 | info.failed_disks = failed; | |
6641 | info.spare_disks = spare; | |
6642 | ||
6643 | info.layout = mddev->layout; | |
9d8f0363 | 6644 | info.chunk_size = mddev->chunk_sectors << 9; |
1da177e4 LT |
6645 | |
6646 | if (copy_to_user(arg, &info, sizeof(info))) | |
6647 | return -EFAULT; | |
6648 | ||
6649 | return 0; | |
6650 | } | |
6651 | ||
f72ffdd6 | 6652 | static int get_bitmap_file(struct mddev *mddev, void __user * arg) |
32a7627c N |
6653 | { |
6654 | mdu_bitmap_file_t *file = NULL; /* too big for stack allocation */ | |
f4ad3d38 | 6655 | char *ptr; |
4af1a041 | 6656 | int err; |
32a7627c | 6657 | |
b6878d9e | 6658 | file = kzalloc(sizeof(*file), GFP_NOIO); |
32a7627c | 6659 | if (!file) |
4af1a041 | 6660 | return -ENOMEM; |
32a7627c | 6661 | |
4af1a041 N |
6662 | err = 0; |
6663 | spin_lock(&mddev->lock); | |
25eafe1a BR |
6664 | /* bitmap enabled */ |
6665 | if (mddev->bitmap_info.file) { | |
6666 | ptr = file_path(mddev->bitmap_info.file, file->pathname, | |
6667 | sizeof(file->pathname)); | |
6668 | if (IS_ERR(ptr)) | |
6669 | err = PTR_ERR(ptr); | |
6670 | else | |
6671 | memmove(file->pathname, ptr, | |
6672 | sizeof(file->pathname)-(ptr-file->pathname)); | |
6673 | } | |
4af1a041 | 6674 | spin_unlock(&mddev->lock); |
32a7627c | 6675 | |
4af1a041 N |
6676 | if (err == 0 && |
6677 | copy_to_user(arg, file, sizeof(*file))) | |
32a7627c | 6678 | err = -EFAULT; |
4af1a041 | 6679 | |
32a7627c N |
6680 | kfree(file); |
6681 | return err; | |
6682 | } | |
6683 | ||
f72ffdd6 | 6684 | static int get_disk_info(struct mddev *mddev, void __user * arg) |
1da177e4 LT |
6685 | { |
6686 | mdu_disk_info_t info; | |
3cb03002 | 6687 | struct md_rdev *rdev; |
1da177e4 LT |
6688 | |
6689 | if (copy_from_user(&info, arg, sizeof(info))) | |
6690 | return -EFAULT; | |
6691 | ||
1ca69c4b | 6692 | rcu_read_lock(); |
57d051dc | 6693 | rdev = md_find_rdev_nr_rcu(mddev, info.number); |
1da177e4 LT |
6694 | if (rdev) { |
6695 | info.major = MAJOR(rdev->bdev->bd_dev); | |
6696 | info.minor = MINOR(rdev->bdev->bd_dev); | |
6697 | info.raid_disk = rdev->raid_disk; | |
6698 | info.state = 0; | |
b2d444d7 | 6699 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 6700 | info.state |= (1<<MD_DISK_FAULTY); |
b2d444d7 | 6701 | else if (test_bit(In_sync, &rdev->flags)) { |
1da177e4 LT |
6702 | info.state |= (1<<MD_DISK_ACTIVE); |
6703 | info.state |= (1<<MD_DISK_SYNC); | |
6704 | } | |
9efdca16 | 6705 | if (test_bit(Journal, &rdev->flags)) |
bac624f3 | 6706 | info.state |= (1<<MD_DISK_JOURNAL); |
8ddf9efe N |
6707 | if (test_bit(WriteMostly, &rdev->flags)) |
6708 | info.state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
6709 | if (test_bit(FailFast, &rdev->flags)) |
6710 | info.state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 LT |
6711 | } else { |
6712 | info.major = info.minor = 0; | |
6713 | info.raid_disk = -1; | |
6714 | info.state = (1<<MD_DISK_REMOVED); | |
6715 | } | |
1ca69c4b | 6716 | rcu_read_unlock(); |
1da177e4 LT |
6717 | |
6718 | if (copy_to_user(arg, &info, sizeof(info))) | |
6719 | return -EFAULT; | |
6720 | ||
6721 | return 0; | |
6722 | } | |
6723 | ||
7e0adbfc | 6724 | int md_add_new_disk(struct mddev *mddev, struct mdu_disk_info_s *info) |
1da177e4 LT |
6725 | { |
6726 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 6727 | struct md_rdev *rdev; |
1da177e4 LT |
6728 | dev_t dev = MKDEV(info->major,info->minor); |
6729 | ||
1aee41f6 GR |
6730 | if (mddev_is_clustered(mddev) && |
6731 | !(info->state & ((1 << MD_DISK_CLUSTER_ADD) | (1 << MD_DISK_CANDIDATE)))) { | |
9d48739e N |
6732 | pr_warn("%s: Cannot add to clustered mddev.\n", |
6733 | mdname(mddev)); | |
1aee41f6 GR |
6734 | return -EINVAL; |
6735 | } | |
6736 | ||
1da177e4 LT |
6737 | if (info->major != MAJOR(dev) || info->minor != MINOR(dev)) |
6738 | return -EOVERFLOW; | |
6739 | ||
6740 | if (!mddev->raid_disks) { | |
6741 | int err; | |
6742 | /* expecting a device which has a superblock */ | |
6743 | rdev = md_import_device(dev, mddev->major_version, mddev->minor_version); | |
6744 | if (IS_ERR(rdev)) { | |
9d48739e | 6745 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6746 | PTR_ERR(rdev)); |
6747 | return PTR_ERR(rdev); | |
6748 | } | |
6749 | if (!list_empty(&mddev->disks)) { | |
3cb03002 N |
6750 | struct md_rdev *rdev0 |
6751 | = list_entry(mddev->disks.next, | |
6752 | struct md_rdev, same_set); | |
a9f326eb | 6753 | err = super_types[mddev->major_version] |
1da177e4 LT |
6754 | .load_super(rdev, rdev0, mddev->minor_version); |
6755 | if (err < 0) { | |
9d48739e | 6756 | pr_warn("md: %s has different UUID to %s\n", |
f72ffdd6 | 6757 | bdevname(rdev->bdev,b), |
1da177e4 LT |
6758 | bdevname(rdev0->bdev,b2)); |
6759 | export_rdev(rdev); | |
6760 | return -EINVAL; | |
6761 | } | |
6762 | } | |
6763 | err = bind_rdev_to_array(rdev, mddev); | |
6764 | if (err) | |
6765 | export_rdev(rdev); | |
6766 | return err; | |
6767 | } | |
6768 | ||
6769 | /* | |
7e0adbfc | 6770 | * md_add_new_disk can be used once the array is assembled |
1da177e4 LT |
6771 | * to add "hot spares". They must already have a superblock |
6772 | * written | |
6773 | */ | |
6774 | if (mddev->pers) { | |
6775 | int err; | |
6776 | if (!mddev->pers->hot_add_disk) { | |
9d48739e N |
6777 | pr_warn("%s: personality does not support diskops!\n", |
6778 | mdname(mddev)); | |
1da177e4 LT |
6779 | return -EINVAL; |
6780 | } | |
7b1e35f6 N |
6781 | if (mddev->persistent) |
6782 | rdev = md_import_device(dev, mddev->major_version, | |
6783 | mddev->minor_version); | |
6784 | else | |
6785 | rdev = md_import_device(dev, -1, -1); | |
1da177e4 | 6786 | if (IS_ERR(rdev)) { |
9d48739e | 6787 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6788 | PTR_ERR(rdev)); |
6789 | return PTR_ERR(rdev); | |
6790 | } | |
1a855a06 | 6791 | /* set saved_raid_disk if appropriate */ |
41158c7e N |
6792 | if (!mddev->persistent) { |
6793 | if (info->state & (1<<MD_DISK_SYNC) && | |
bf572541 | 6794 | info->raid_disk < mddev->raid_disks) { |
41158c7e | 6795 | rdev->raid_disk = info->raid_disk; |
bf572541 | 6796 | set_bit(In_sync, &rdev->flags); |
8313b8e5 | 6797 | clear_bit(Bitmap_sync, &rdev->flags); |
bf572541 | 6798 | } else |
41158c7e | 6799 | rdev->raid_disk = -1; |
f466722c | 6800 | rdev->saved_raid_disk = rdev->raid_disk; |
41158c7e N |
6801 | } else |
6802 | super_types[mddev->major_version]. | |
6803 | validate_super(mddev, rdev); | |
bedd86b7 | 6804 | if ((info->state & (1<<MD_DISK_SYNC)) && |
f4563091 | 6805 | rdev->raid_disk != info->raid_disk) { |
bedd86b7 N |
6806 | /* This was a hot-add request, but events doesn't |
6807 | * match, so reject it. | |
6808 | */ | |
6809 | export_rdev(rdev); | |
6810 | return -EINVAL; | |
6811 | } | |
6812 | ||
b2d444d7 | 6813 | clear_bit(In_sync, &rdev->flags); /* just to be sure */ |
8ddf9efe N |
6814 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6815 | set_bit(WriteMostly, &rdev->flags); | |
575a80fa N |
6816 | else |
6817 | clear_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6818 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6819 | set_bit(FailFast, &rdev->flags); | |
6820 | else | |
6821 | clear_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6822 | |
f6b6ec5c SL |
6823 | if (info->state & (1<<MD_DISK_JOURNAL)) { |
6824 | struct md_rdev *rdev2; | |
6825 | bool has_journal = false; | |
6826 | ||
6827 | /* make sure no existing journal disk */ | |
6828 | rdev_for_each(rdev2, mddev) { | |
6829 | if (test_bit(Journal, &rdev2->flags)) { | |
6830 | has_journal = true; | |
6831 | break; | |
6832 | } | |
6833 | } | |
230b55fa | 6834 | if (has_journal || mddev->bitmap) { |
f6b6ec5c SL |
6835 | export_rdev(rdev); |
6836 | return -EBUSY; | |
6837 | } | |
bac624f3 | 6838 | set_bit(Journal, &rdev->flags); |
f6b6ec5c | 6839 | } |
1aee41f6 GR |
6840 | /* |
6841 | * check whether the device shows up in other nodes | |
6842 | */ | |
6843 | if (mddev_is_clustered(mddev)) { | |
dbb64f86 | 6844 | if (info->state & (1 << MD_DISK_CANDIDATE)) |
1aee41f6 | 6845 | set_bit(Candidate, &rdev->flags); |
dbb64f86 | 6846 | else if (info->state & (1 << MD_DISK_CLUSTER_ADD)) { |
1aee41f6 | 6847 | /* --add initiated by this node */ |
dbb64f86 | 6848 | err = md_cluster_ops->add_new_disk(mddev, rdev); |
1aee41f6 | 6849 | if (err) { |
1aee41f6 GR |
6850 | export_rdev(rdev); |
6851 | return err; | |
6852 | } | |
6853 | } | |
6854 | } | |
6855 | ||
1da177e4 LT |
6856 | rdev->raid_disk = -1; |
6857 | err = bind_rdev_to_array(rdev, mddev); | |
dbb64f86 | 6858 | |
1da177e4 LT |
6859 | if (err) |
6860 | export_rdev(rdev); | |
dbb64f86 GR |
6861 | |
6862 | if (mddev_is_clustered(mddev)) { | |
e566aef1 GJ |
6863 | if (info->state & (1 << MD_DISK_CANDIDATE)) { |
6864 | if (!err) { | |
6865 | err = md_cluster_ops->new_disk_ack(mddev, | |
6866 | err == 0); | |
6867 | if (err) | |
6868 | md_kick_rdev_from_array(rdev); | |
6869 | } | |
6870 | } else { | |
dbb64f86 GR |
6871 | if (err) |
6872 | md_cluster_ops->add_new_disk_cancel(mddev); | |
6873 | else | |
6874 | err = add_bound_rdev(rdev); | |
6875 | } | |
6876 | ||
6877 | } else if (!err) | |
a6da4ef8 | 6878 | err = add_bound_rdev(rdev); |
dbb64f86 | 6879 | |
1da177e4 LT |
6880 | return err; |
6881 | } | |
6882 | ||
7e0adbfc | 6883 | /* otherwise, md_add_new_disk is only allowed |
1da177e4 LT |
6884 | * for major_version==0 superblocks |
6885 | */ | |
6886 | if (mddev->major_version != 0) { | |
9d48739e | 6887 | pr_warn("%s: ADD_NEW_DISK not supported\n", mdname(mddev)); |
1da177e4 LT |
6888 | return -EINVAL; |
6889 | } | |
6890 | ||
6891 | if (!(info->state & (1<<MD_DISK_FAULTY))) { | |
6892 | int err; | |
d710e138 | 6893 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6894 | if (IS_ERR(rdev)) { |
9d48739e | 6895 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6896 | PTR_ERR(rdev)); |
6897 | return PTR_ERR(rdev); | |
6898 | } | |
6899 | rdev->desc_nr = info->number; | |
6900 | if (info->raid_disk < mddev->raid_disks) | |
6901 | rdev->raid_disk = info->raid_disk; | |
6902 | else | |
6903 | rdev->raid_disk = -1; | |
6904 | ||
1da177e4 | 6905 | if (rdev->raid_disk < mddev->raid_disks) |
b2d444d7 N |
6906 | if (info->state & (1<<MD_DISK_SYNC)) |
6907 | set_bit(In_sync, &rdev->flags); | |
1da177e4 | 6908 | |
8ddf9efe N |
6909 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6910 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6911 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6912 | set_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6913 | |
1da177e4 | 6914 | if (!mddev->persistent) { |
9d48739e | 6915 | pr_debug("md: nonpersistent superblock ...\n"); |
77304d2a MS |
6916 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
6917 | } else | |
57b2caa3 | 6918 | rdev->sb_start = calc_dev_sboffset(rdev); |
8190e754 | 6919 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6920 | |
2bf071bf N |
6921 | err = bind_rdev_to_array(rdev, mddev); |
6922 | if (err) { | |
6923 | export_rdev(rdev); | |
6924 | return err; | |
6925 | } | |
1da177e4 LT |
6926 | } |
6927 | ||
6928 | return 0; | |
6929 | } | |
6930 | ||
f72ffdd6 | 6931 | static int hot_remove_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6932 | { |
6933 | char b[BDEVNAME_SIZE]; | |
3cb03002 | 6934 | struct md_rdev *rdev; |
1da177e4 | 6935 | |
c42a0e26 YY |
6936 | if (!mddev->pers) |
6937 | return -ENODEV; | |
6938 | ||
1da177e4 LT |
6939 | rdev = find_rdev(mddev, dev); |
6940 | if (!rdev) | |
6941 | return -ENXIO; | |
6942 | ||
2910ff17 GR |
6943 | if (rdev->raid_disk < 0) |
6944 | goto kick_rdev; | |
293467aa | 6945 | |
3ea8929d N |
6946 | clear_bit(Blocked, &rdev->flags); |
6947 | remove_and_add_spares(mddev, rdev); | |
6948 | ||
1da177e4 LT |
6949 | if (rdev->raid_disk >= 0) |
6950 | goto busy; | |
6951 | ||
2910ff17 | 6952 | kick_rdev: |
bca5b065 ZH |
6953 | if (mddev_is_clustered(mddev)) { |
6954 | if (md_cluster_ops->remove_disk(mddev, rdev)) | |
6955 | goto busy; | |
6956 | } | |
88bcfef7 | 6957 | |
fb56dfef | 6958 | md_kick_rdev_from_array(rdev); |
2953079c | 6959 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6960 | if (mddev->thread) |
6961 | md_wakeup_thread(mddev->thread); | |
6962 | else | |
6963 | md_update_sb(mddev, 1); | |
d7603b7e | 6964 | md_new_event(mddev); |
1da177e4 LT |
6965 | |
6966 | return 0; | |
6967 | busy: | |
9d48739e N |
6968 | pr_debug("md: cannot remove active disk %s from %s ...\n", |
6969 | bdevname(rdev->bdev,b), mdname(mddev)); | |
1da177e4 LT |
6970 | return -EBUSY; |
6971 | } | |
6972 | ||
f72ffdd6 | 6973 | static int hot_add_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6974 | { |
6975 | char b[BDEVNAME_SIZE]; | |
6976 | int err; | |
3cb03002 | 6977 | struct md_rdev *rdev; |
1da177e4 LT |
6978 | |
6979 | if (!mddev->pers) | |
6980 | return -ENODEV; | |
6981 | ||
6982 | if (mddev->major_version != 0) { | |
9d48739e | 6983 | pr_warn("%s: HOT_ADD may only be used with version-0 superblocks.\n", |
1da177e4 LT |
6984 | mdname(mddev)); |
6985 | return -EINVAL; | |
6986 | } | |
6987 | if (!mddev->pers->hot_add_disk) { | |
9d48739e | 6988 | pr_warn("%s: personality does not support diskops!\n", |
1da177e4 LT |
6989 | mdname(mddev)); |
6990 | return -EINVAL; | |
6991 | } | |
6992 | ||
d710e138 | 6993 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6994 | if (IS_ERR(rdev)) { |
9d48739e | 6995 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6996 | PTR_ERR(rdev)); |
6997 | return -EINVAL; | |
6998 | } | |
6999 | ||
7000 | if (mddev->persistent) | |
57b2caa3 | 7001 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 7002 | else |
77304d2a | 7003 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
1da177e4 | 7004 | |
8190e754 | 7005 | rdev->sectors = rdev->sb_start; |
1da177e4 | 7006 | |
b2d444d7 | 7007 | if (test_bit(Faulty, &rdev->flags)) { |
9d48739e | 7008 | pr_warn("md: can not hot-add faulty %s disk to %s!\n", |
1da177e4 LT |
7009 | bdevname(rdev->bdev,b), mdname(mddev)); |
7010 | err = -EINVAL; | |
7011 | goto abort_export; | |
7012 | } | |
293467aa | 7013 | |
b2d444d7 | 7014 | clear_bit(In_sync, &rdev->flags); |
1da177e4 | 7015 | rdev->desc_nr = -1; |
5842730d | 7016 | rdev->saved_raid_disk = -1; |
2bf071bf N |
7017 | err = bind_rdev_to_array(rdev, mddev); |
7018 | if (err) | |
2aa82191 | 7019 | goto abort_export; |
1da177e4 LT |
7020 | |
7021 | /* | |
7022 | * The rest should better be atomic, we can have disk failures | |
7023 | * noticed in interrupt contexts ... | |
7024 | */ | |
7025 | ||
1da177e4 LT |
7026 | rdev->raid_disk = -1; |
7027 | ||
2953079c | 7028 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
7029 | if (!mddev->thread) |
7030 | md_update_sb(mddev, 1); | |
1da177e4 LT |
7031 | /* |
7032 | * Kick recovery, maybe this spare has to be added to the | |
7033 | * array immediately. | |
7034 | */ | |
7035 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7036 | md_wakeup_thread(mddev->thread); | |
d7603b7e | 7037 | md_new_event(mddev); |
1da177e4 LT |
7038 | return 0; |
7039 | ||
1da177e4 LT |
7040 | abort_export: |
7041 | export_rdev(rdev); | |
7042 | return err; | |
7043 | } | |
7044 | ||
fd01b88c | 7045 | static int set_bitmap_file(struct mddev *mddev, int fd) |
32a7627c | 7046 | { |
035328c2 | 7047 | int err = 0; |
32a7627c | 7048 | |
36fa3063 | 7049 | if (mddev->pers) { |
d66b1b39 | 7050 | if (!mddev->pers->quiesce || !mddev->thread) |
36fa3063 N |
7051 | return -EBUSY; |
7052 | if (mddev->recovery || mddev->sync_thread) | |
7053 | return -EBUSY; | |
7054 | /* we should be able to change the bitmap.. */ | |
7055 | } | |
32a7627c | 7056 | |
36fa3063 | 7057 | if (fd >= 0) { |
035328c2 | 7058 | struct inode *inode; |
1e594bb2 N |
7059 | struct file *f; |
7060 | ||
7061 | if (mddev->bitmap || mddev->bitmap_info.file) | |
36fa3063 | 7062 | return -EEXIST; /* cannot add when bitmap is present */ |
1e594bb2 | 7063 | f = fget(fd); |
32a7627c | 7064 | |
1e594bb2 | 7065 | if (f == NULL) { |
9d48739e N |
7066 | pr_warn("%s: error: failed to get bitmap file\n", |
7067 | mdname(mddev)); | |
36fa3063 N |
7068 | return -EBADF; |
7069 | } | |
7070 | ||
1e594bb2 | 7071 | inode = f->f_mapping->host; |
035328c2 | 7072 | if (!S_ISREG(inode->i_mode)) { |
9d48739e N |
7073 | pr_warn("%s: error: bitmap file must be a regular file\n", |
7074 | mdname(mddev)); | |
035328c2 | 7075 | err = -EBADF; |
1e594bb2 | 7076 | } else if (!(f->f_mode & FMODE_WRITE)) { |
9d48739e N |
7077 | pr_warn("%s: error: bitmap file must open for write\n", |
7078 | mdname(mddev)); | |
035328c2 N |
7079 | err = -EBADF; |
7080 | } else if (atomic_read(&inode->i_writecount) != 1) { | |
9d48739e N |
7081 | pr_warn("%s: error: bitmap file is already in use\n", |
7082 | mdname(mddev)); | |
035328c2 N |
7083 | err = -EBUSY; |
7084 | } | |
7085 | if (err) { | |
1e594bb2 | 7086 | fput(f); |
36fa3063 N |
7087 | return err; |
7088 | } | |
1e594bb2 | 7089 | mddev->bitmap_info.file = f; |
c3d9714e | 7090 | mddev->bitmap_info.offset = 0; /* file overrides offset */ |
36fa3063 N |
7091 | } else if (mddev->bitmap == NULL) |
7092 | return -ENOENT; /* cannot remove what isn't there */ | |
7093 | err = 0; | |
7094 | if (mddev->pers) { | |
69e51b44 | 7095 | if (fd >= 0) { |
f9209a32 GR |
7096 | struct bitmap *bitmap; |
7097 | ||
e64e4018 | 7098 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7099 | mddev_suspend(mddev); |
f9209a32 GR |
7100 | if (!IS_ERR(bitmap)) { |
7101 | mddev->bitmap = bitmap; | |
e64e4018 | 7102 | err = md_bitmap_load(mddev); |
ba599aca N |
7103 | } else |
7104 | err = PTR_ERR(bitmap); | |
52a0d49d | 7105 | if (err) { |
e64e4018 | 7106 | md_bitmap_destroy(mddev); |
52a0d49d N |
7107 | fd = -1; |
7108 | } | |
9e1cc0a5 | 7109 | mddev_resume(mddev); |
52a0d49d | 7110 | } else if (fd < 0) { |
9e1cc0a5 | 7111 | mddev_suspend(mddev); |
e64e4018 | 7112 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7113 | mddev_resume(mddev); |
d7375ab3 | 7114 | } |
d7375ab3 N |
7115 | } |
7116 | if (fd < 0) { | |
4af1a041 N |
7117 | struct file *f = mddev->bitmap_info.file; |
7118 | if (f) { | |
7119 | spin_lock(&mddev->lock); | |
7120 | mddev->bitmap_info.file = NULL; | |
7121 | spin_unlock(&mddev->lock); | |
7122 | fput(f); | |
7123 | } | |
36fa3063 N |
7124 | } |
7125 | ||
32a7627c N |
7126 | return err; |
7127 | } | |
7128 | ||
1da177e4 | 7129 | /* |
7e0adbfc | 7130 | * md_set_array_info is used two different ways |
1da177e4 LT |
7131 | * The original usage is when creating a new array. |
7132 | * In this usage, raid_disks is > 0 and it together with | |
7133 | * level, size, not_persistent,layout,chunksize determine the | |
7134 | * shape of the array. | |
7135 | * This will always create an array with a type-0.90.0 superblock. | |
7136 | * The newer usage is when assembling an array. | |
7137 | * In this case raid_disks will be 0, and the major_version field is | |
7138 | * use to determine which style super-blocks are to be found on the devices. | |
7139 | * The minor and patch _version numbers are also kept incase the | |
7140 | * super_block handler wishes to interpret them. | |
7141 | */ | |
7e0adbfc | 7142 | int md_set_array_info(struct mddev *mddev, struct mdu_array_info_s *info) |
1da177e4 | 7143 | { |
1da177e4 LT |
7144 | if (info->raid_disks == 0) { |
7145 | /* just setting version number for superblock loading */ | |
7146 | if (info->major_version < 0 || | |
50511da3 | 7147 | info->major_version >= ARRAY_SIZE(super_types) || |
1da177e4 LT |
7148 | super_types[info->major_version].name == NULL) { |
7149 | /* maybe try to auto-load a module? */ | |
9d48739e | 7150 | pr_warn("md: superblock version %d not known\n", |
1da177e4 LT |
7151 | info->major_version); |
7152 | return -EINVAL; | |
7153 | } | |
7154 | mddev->major_version = info->major_version; | |
7155 | mddev->minor_version = info->minor_version; | |
7156 | mddev->patch_version = info->patch_version; | |
3f9d7b0d | 7157 | mddev->persistent = !info->not_persistent; |
cbd19983 N |
7158 | /* ensure mddev_put doesn't delete this now that there |
7159 | * is some minimal configuration. | |
7160 | */ | |
9ebc6ef1 | 7161 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
7162 | return 0; |
7163 | } | |
7164 | mddev->major_version = MD_MAJOR_VERSION; | |
7165 | mddev->minor_version = MD_MINOR_VERSION; | |
7166 | mddev->patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 7167 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
7168 | |
7169 | mddev->level = info->level; | |
17115e03 | 7170 | mddev->clevel[0] = 0; |
58c0fed4 | 7171 | mddev->dev_sectors = 2 * (sector_t)info->size; |
1da177e4 LT |
7172 | mddev->raid_disks = info->raid_disks; |
7173 | /* don't set md_minor, it is determined by which /dev/md* was | |
7174 | * openned | |
7175 | */ | |
7176 | if (info->state & (1<<MD_SB_CLEAN)) | |
7177 | mddev->recovery_cp = MaxSector; | |
7178 | else | |
7179 | mddev->recovery_cp = 0; | |
7180 | mddev->persistent = ! info->not_persistent; | |
e691063a | 7181 | mddev->external = 0; |
1da177e4 LT |
7182 | |
7183 | mddev->layout = info->layout; | |
33f2c35a N |
7184 | if (mddev->level == 0) |
7185 | /* Cannot trust RAID0 layout info here */ | |
7186 | mddev->layout = -1; | |
9d8f0363 | 7187 | mddev->chunk_sectors = info->chunk_size >> 9; |
1da177e4 | 7188 | |
2953079c | 7189 | if (mddev->persistent) { |
1b3bae49 N |
7190 | mddev->max_disks = MD_SB_DISKS; |
7191 | mddev->flags = 0; | |
7192 | mddev->sb_flags = 0; | |
2953079c SL |
7193 | } |
7194 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
1da177e4 | 7195 | |
c3d9714e | 7196 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 7197 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
c3d9714e | 7198 | mddev->bitmap_info.offset = 0; |
b2a2703c | 7199 | |
f6705578 N |
7200 | mddev->reshape_position = MaxSector; |
7201 | ||
1da177e4 LT |
7202 | /* |
7203 | * Generate a 128 bit UUID | |
7204 | */ | |
7205 | get_random_bytes(mddev->uuid, 16); | |
7206 | ||
f6705578 | 7207 | mddev->new_level = mddev->level; |
664e7c41 | 7208 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
7209 | mddev->new_layout = mddev->layout; |
7210 | mddev->delta_disks = 0; | |
2c810cdd | 7211 | mddev->reshape_backwards = 0; |
f6705578 | 7212 | |
1da177e4 LT |
7213 | return 0; |
7214 | } | |
7215 | ||
fd01b88c | 7216 | void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors) |
1f403624 | 7217 | { |
efa4b77b | 7218 | lockdep_assert_held(&mddev->reconfig_mutex); |
b522adcd DW |
7219 | |
7220 | if (mddev->external_size) | |
7221 | return; | |
7222 | ||
1f403624 DW |
7223 | mddev->array_sectors = array_sectors; |
7224 | } | |
7225 | EXPORT_SYMBOL(md_set_array_sectors); | |
7226 | ||
fd01b88c | 7227 | static int update_size(struct mddev *mddev, sector_t num_sectors) |
a35b0d69 | 7228 | { |
3cb03002 | 7229 | struct md_rdev *rdev; |
a35b0d69 | 7230 | int rv; |
d71f9f88 | 7231 | int fit = (num_sectors == 0); |
818da59f | 7232 | sector_t old_dev_sectors = mddev->dev_sectors; |
ab5a98b1 | 7233 | |
a35b0d69 N |
7234 | if (mddev->pers->resize == NULL) |
7235 | return -EINVAL; | |
d71f9f88 AN |
7236 | /* The "num_sectors" is the number of sectors of each device that |
7237 | * is used. This can only make sense for arrays with redundancy. | |
7238 | * linear and raid0 always use whatever space is available. We can only | |
7239 | * consider changing this number if no resync or reconstruction is | |
7240 | * happening, and if the new size is acceptable. It must fit before the | |
0f420358 | 7241 | * sb_start or, if that is <data_offset, it must fit before the size |
d71f9f88 AN |
7242 | * of each device. If num_sectors is zero, we find the largest size |
7243 | * that fits. | |
a35b0d69 | 7244 | */ |
f851b60d N |
7245 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
7246 | mddev->sync_thread) | |
a35b0d69 | 7247 | return -EBUSY; |
bd8839e0 N |
7248 | if (mddev->ro) |
7249 | return -EROFS; | |
a4a6125a | 7250 | |
dafb20fa | 7251 | rdev_for_each(rdev, mddev) { |
dd8ac336 | 7252 | sector_t avail = rdev->sectors; |
01ab5662 | 7253 | |
d71f9f88 AN |
7254 | if (fit && (num_sectors == 0 || num_sectors > avail)) |
7255 | num_sectors = avail; | |
7256 | if (avail < num_sectors) | |
a35b0d69 N |
7257 | return -ENOSPC; |
7258 | } | |
d71f9f88 | 7259 | rv = mddev->pers->resize(mddev, num_sectors); |
c9483634 | 7260 | if (!rv) { |
818da59f GJ |
7261 | if (mddev_is_clustered(mddev)) |
7262 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
7263 | else if (mddev->queue) { | |
2c247c51 CH |
7264 | set_capacity_and_notify(mddev->gendisk, |
7265 | mddev->array_sectors); | |
c9483634 GJ |
7266 | } |
7267 | } | |
a35b0d69 N |
7268 | return rv; |
7269 | } | |
7270 | ||
fd01b88c | 7271 | static int update_raid_disks(struct mddev *mddev, int raid_disks) |
da943b99 N |
7272 | { |
7273 | int rv; | |
c6563a8c | 7274 | struct md_rdev *rdev; |
da943b99 | 7275 | /* change the number of raid disks */ |
63c70c4f | 7276 | if (mddev->pers->check_reshape == NULL) |
da943b99 | 7277 | return -EINVAL; |
bd8839e0 N |
7278 | if (mddev->ro) |
7279 | return -EROFS; | |
da943b99 | 7280 | if (raid_disks <= 0 || |
233fca36 | 7281 | (mddev->max_disks && raid_disks >= mddev->max_disks)) |
da943b99 | 7282 | return -EINVAL; |
f851b60d N |
7283 | if (mddev->sync_thread || |
7284 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || | |
a8da01f7 | 7285 | test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) || |
f851b60d | 7286 | mddev->reshape_position != MaxSector) |
da943b99 | 7287 | return -EBUSY; |
c6563a8c N |
7288 | |
7289 | rdev_for_each(rdev, mddev) { | |
7290 | if (mddev->raid_disks < raid_disks && | |
7291 | rdev->data_offset < rdev->new_data_offset) | |
7292 | return -EINVAL; | |
7293 | if (mddev->raid_disks > raid_disks && | |
7294 | rdev->data_offset > rdev->new_data_offset) | |
7295 | return -EINVAL; | |
7296 | } | |
7297 | ||
63c70c4f | 7298 | mddev->delta_disks = raid_disks - mddev->raid_disks; |
2c810cdd N |
7299 | if (mddev->delta_disks < 0) |
7300 | mddev->reshape_backwards = 1; | |
7301 | else if (mddev->delta_disks > 0) | |
7302 | mddev->reshape_backwards = 0; | |
63c70c4f N |
7303 | |
7304 | rv = mddev->pers->check_reshape(mddev); | |
2c810cdd | 7305 | if (rv < 0) { |
de171cb9 | 7306 | mddev->delta_disks = 0; |
2c810cdd N |
7307 | mddev->reshape_backwards = 0; |
7308 | } | |
da943b99 N |
7309 | return rv; |
7310 | } | |
7311 | ||
1da177e4 LT |
7312 | /* |
7313 | * update_array_info is used to change the configuration of an | |
7314 | * on-line array. | |
7315 | * The version, ctime,level,size,raid_disks,not_persistent, layout,chunk_size | |
7316 | * fields in the info are checked against the array. | |
7317 | * Any differences that cannot be handled will cause an error. | |
7318 | * Normally, only one change can be managed at a time. | |
7319 | */ | |
fd01b88c | 7320 | static int update_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
7321 | { |
7322 | int rv = 0; | |
7323 | int cnt = 0; | |
36fa3063 N |
7324 | int state = 0; |
7325 | ||
7326 | /* calculate expected state,ignoring low bits */ | |
c3d9714e | 7327 | if (mddev->bitmap && mddev->bitmap_info.offset) |
36fa3063 | 7328 | state |= (1 << MD_SB_BITMAP_PRESENT); |
1da177e4 LT |
7329 | |
7330 | if (mddev->major_version != info->major_version || | |
7331 | mddev->minor_version != info->minor_version || | |
7332 | /* mddev->patch_version != info->patch_version || */ | |
7333 | mddev->ctime != info->ctime || | |
7334 | mddev->level != info->level || | |
7335 | /* mddev->layout != info->layout || */ | |
4e023612 | 7336 | mddev->persistent != !info->not_persistent || |
9d8f0363 | 7337 | mddev->chunk_sectors != info->chunk_size >> 9 || |
36fa3063 N |
7338 | /* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */ |
7339 | ((state^info->state) & 0xfffffe00) | |
7340 | ) | |
1da177e4 LT |
7341 | return -EINVAL; |
7342 | /* Check there is only one change */ | |
58c0fed4 AN |
7343 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
7344 | cnt++; | |
7345 | if (mddev->raid_disks != info->raid_disks) | |
7346 | cnt++; | |
7347 | if (mddev->layout != info->layout) | |
7348 | cnt++; | |
7349 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) | |
7350 | cnt++; | |
7351 | if (cnt == 0) | |
7352 | return 0; | |
7353 | if (cnt > 1) | |
7354 | return -EINVAL; | |
1da177e4 LT |
7355 | |
7356 | if (mddev->layout != info->layout) { | |
7357 | /* Change layout | |
7358 | * we don't need to do anything at the md level, the | |
7359 | * personality will take care of it all. | |
7360 | */ | |
50ac168a | 7361 | if (mddev->pers->check_reshape == NULL) |
1da177e4 | 7362 | return -EINVAL; |
597a711b N |
7363 | else { |
7364 | mddev->new_layout = info->layout; | |
50ac168a | 7365 | rv = mddev->pers->check_reshape(mddev); |
597a711b N |
7366 | if (rv) |
7367 | mddev->new_layout = mddev->layout; | |
7368 | return rv; | |
7369 | } | |
1da177e4 | 7370 | } |
58c0fed4 | 7371 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
d71f9f88 | 7372 | rv = update_size(mddev, (sector_t)info->size * 2); |
a35b0d69 | 7373 | |
da943b99 N |
7374 | if (mddev->raid_disks != info->raid_disks) |
7375 | rv = update_raid_disks(mddev, info->raid_disks); | |
7376 | ||
36fa3063 | 7377 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) { |
293467aa GR |
7378 | if (mddev->pers->quiesce == NULL || mddev->thread == NULL) { |
7379 | rv = -EINVAL; | |
7380 | goto err; | |
7381 | } | |
7382 | if (mddev->recovery || mddev->sync_thread) { | |
7383 | rv = -EBUSY; | |
7384 | goto err; | |
7385 | } | |
36fa3063 | 7386 | if (info->state & (1<<MD_SB_BITMAP_PRESENT)) { |
f9209a32 | 7387 | struct bitmap *bitmap; |
36fa3063 | 7388 | /* add the bitmap */ |
293467aa GR |
7389 | if (mddev->bitmap) { |
7390 | rv = -EEXIST; | |
7391 | goto err; | |
7392 | } | |
7393 | if (mddev->bitmap_info.default_offset == 0) { | |
7394 | rv = -EINVAL; | |
7395 | goto err; | |
7396 | } | |
c3d9714e N |
7397 | mddev->bitmap_info.offset = |
7398 | mddev->bitmap_info.default_offset; | |
6409bb05 N |
7399 | mddev->bitmap_info.space = |
7400 | mddev->bitmap_info.default_space; | |
e64e4018 | 7401 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7402 | mddev_suspend(mddev); |
f9209a32 GR |
7403 | if (!IS_ERR(bitmap)) { |
7404 | mddev->bitmap = bitmap; | |
e64e4018 | 7405 | rv = md_bitmap_load(mddev); |
ba599aca N |
7406 | } else |
7407 | rv = PTR_ERR(bitmap); | |
36fa3063 | 7408 | if (rv) |
e64e4018 | 7409 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7410 | mddev_resume(mddev); |
36fa3063 N |
7411 | } else { |
7412 | /* remove the bitmap */ | |
293467aa GR |
7413 | if (!mddev->bitmap) { |
7414 | rv = -ENOENT; | |
7415 | goto err; | |
7416 | } | |
7417 | if (mddev->bitmap->storage.file) { | |
7418 | rv = -EINVAL; | |
7419 | goto err; | |
7420 | } | |
f6a2dc64 GJ |
7421 | if (mddev->bitmap_info.nodes) { |
7422 | /* hold PW on all the bitmap lock */ | |
7423 | if (md_cluster_ops->lock_all_bitmaps(mddev) <= 0) { | |
9d48739e | 7424 | pr_warn("md: can't change bitmap to none since the array is in use by more than one node\n"); |
f6a2dc64 GJ |
7425 | rv = -EPERM; |
7426 | md_cluster_ops->unlock_all_bitmaps(mddev); | |
7427 | goto err; | |
7428 | } | |
7429 | ||
7430 | mddev->bitmap_info.nodes = 0; | |
7431 | md_cluster_ops->leave(mddev); | |
edee9dfe | 7432 | module_put(md_cluster_mod); |
7c9d5c54 | 7433 | mddev->safemode_delay = DEFAULT_SAFEMODE_DELAY; |
f6a2dc64 | 7434 | } |
9e1cc0a5 | 7435 | mddev_suspend(mddev); |
e64e4018 | 7436 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7437 | mddev_resume(mddev); |
c3d9714e | 7438 | mddev->bitmap_info.offset = 0; |
36fa3063 N |
7439 | } |
7440 | } | |
850b2b42 | 7441 | md_update_sb(mddev, 1); |
293467aa GR |
7442 | return rv; |
7443 | err: | |
1da177e4 LT |
7444 | return rv; |
7445 | } | |
7446 | ||
fd01b88c | 7447 | static int set_disk_faulty(struct mddev *mddev, dev_t dev) |
1da177e4 | 7448 | { |
3cb03002 | 7449 | struct md_rdev *rdev; |
1ca69c4b | 7450 | int err = 0; |
1da177e4 LT |
7451 | |
7452 | if (mddev->pers == NULL) | |
7453 | return -ENODEV; | |
7454 | ||
1ca69c4b | 7455 | rcu_read_lock(); |
1532d9e8 | 7456 | rdev = md_find_rdev_rcu(mddev, dev); |
1da177e4 | 7457 | if (!rdev) |
1ca69c4b N |
7458 | err = -ENODEV; |
7459 | else { | |
7460 | md_error(mddev, rdev); | |
7461 | if (!test_bit(Faulty, &rdev->flags)) | |
7462 | err = -EBUSY; | |
7463 | } | |
7464 | rcu_read_unlock(); | |
7465 | return err; | |
1da177e4 LT |
7466 | } |
7467 | ||
2f9618ce AN |
7468 | /* |
7469 | * We have a problem here : there is no easy way to give a CHS | |
7470 | * virtual geometry. We currently pretend that we have a 2 heads | |
7471 | * 4 sectors (with a BIG number of cylinders...). This drives | |
7472 | * dosfs just mad... ;-) | |
7473 | */ | |
a885c8c4 CH |
7474 | static int md_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
7475 | { | |
fd01b88c | 7476 | struct mddev *mddev = bdev->bd_disk->private_data; |
a885c8c4 CH |
7477 | |
7478 | geo->heads = 2; | |
7479 | geo->sectors = 4; | |
49ce6cea | 7480 | geo->cylinders = mddev->array_sectors / 8; |
a885c8c4 CH |
7481 | return 0; |
7482 | } | |
7483 | ||
cb335f88 NS |
7484 | static inline bool md_ioctl_valid(unsigned int cmd) |
7485 | { | |
7486 | switch (cmd) { | |
7487 | case ADD_NEW_DISK: | |
cb335f88 NS |
7488 | case GET_ARRAY_INFO: |
7489 | case GET_BITMAP_FILE: | |
7490 | case GET_DISK_INFO: | |
7491 | case HOT_ADD_DISK: | |
7492 | case HOT_REMOVE_DISK: | |
cb335f88 NS |
7493 | case RAID_VERSION: |
7494 | case RESTART_ARRAY_RW: | |
7495 | case RUN_ARRAY: | |
7496 | case SET_ARRAY_INFO: | |
7497 | case SET_BITMAP_FILE: | |
7498 | case SET_DISK_FAULTY: | |
7499 | case STOP_ARRAY: | |
7500 | case STOP_ARRAY_RO: | |
1aee41f6 | 7501 | case CLUSTERED_DISK_NACK: |
cb335f88 NS |
7502 | return true; |
7503 | default: | |
7504 | return false; | |
7505 | } | |
7506 | } | |
7507 | ||
a39907fa | 7508 | static int md_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
7509 | unsigned int cmd, unsigned long arg) |
7510 | { | |
7511 | int err = 0; | |
7512 | void __user *argp = (void __user *)arg; | |
fd01b88c | 7513 | struct mddev *mddev = NULL; |
065e519e | 7514 | bool did_set_md_closing = false; |
1da177e4 | 7515 | |
cb335f88 NS |
7516 | if (!md_ioctl_valid(cmd)) |
7517 | return -ENOTTY; | |
7518 | ||
506c9e44 N |
7519 | switch (cmd) { |
7520 | case RAID_VERSION: | |
7521 | case GET_ARRAY_INFO: | |
7522 | case GET_DISK_INFO: | |
7523 | break; | |
7524 | default: | |
7525 | if (!capable(CAP_SYS_ADMIN)) | |
7526 | return -EACCES; | |
7527 | } | |
1da177e4 LT |
7528 | |
7529 | /* | |
7530 | * Commands dealing with the RAID driver but not any | |
7531 | * particular array: | |
7532 | */ | |
c02c0aeb N |
7533 | switch (cmd) { |
7534 | case RAID_VERSION: | |
7535 | err = get_version(argp); | |
3adc28d8 | 7536 | goto out; |
c02c0aeb | 7537 | default:; |
1da177e4 LT |
7538 | } |
7539 | ||
7540 | /* | |
7541 | * Commands creating/starting a new array: | |
7542 | */ | |
7543 | ||
a39907fa | 7544 | mddev = bdev->bd_disk->private_data; |
1da177e4 LT |
7545 | |
7546 | if (!mddev) { | |
7547 | BUG(); | |
3adc28d8 | 7548 | goto out; |
1da177e4 LT |
7549 | } |
7550 | ||
1ca69c4b N |
7551 | /* Some actions do not requires the mutex */ |
7552 | switch (cmd) { | |
7553 | case GET_ARRAY_INFO: | |
7554 | if (!mddev->raid_disks && !mddev->external) | |
7555 | err = -ENODEV; | |
7556 | else | |
7557 | err = get_array_info(mddev, argp); | |
3adc28d8 | 7558 | goto out; |
1ca69c4b N |
7559 | |
7560 | case GET_DISK_INFO: | |
7561 | if (!mddev->raid_disks && !mddev->external) | |
7562 | err = -ENODEV; | |
7563 | else | |
7564 | err = get_disk_info(mddev, argp); | |
3adc28d8 | 7565 | goto out; |
1ca69c4b N |
7566 | |
7567 | case SET_DISK_FAULTY: | |
7568 | err = set_disk_faulty(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7569 | goto out; |
4af1a041 N |
7570 | |
7571 | case GET_BITMAP_FILE: | |
7572 | err = get_bitmap_file(mddev, argp); | |
7573 | goto out; | |
7574 | ||
1ca69c4b N |
7575 | } |
7576 | ||
78b990cf | 7577 | if (cmd == ADD_NEW_DISK || cmd == HOT_ADD_DISK) |
cc1ffe61 | 7578 | flush_rdev_wq(mddev); |
a7a3f08d | 7579 | |
90f5f7ad HR |
7580 | if (cmd == HOT_REMOVE_DISK) |
7581 | /* need to ensure recovery thread has run */ | |
7582 | wait_event_interruptible_timeout(mddev->sb_wait, | |
7583 | !test_bit(MD_RECOVERY_NEEDED, | |
82a301cb | 7584 | &mddev->recovery), |
90f5f7ad | 7585 | msecs_to_jiffies(5000)); |
260fa034 N |
7586 | if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) { |
7587 | /* Need to flush page cache, and ensure no-one else opens | |
7588 | * and writes | |
7589 | */ | |
7590 | mutex_lock(&mddev->open_mutex); | |
9ba3b7f5 | 7591 | if (mddev->pers && atomic_read(&mddev->openers) > 1) { |
260fa034 N |
7592 | mutex_unlock(&mddev->open_mutex); |
7593 | err = -EBUSY; | |
3adc28d8 | 7594 | goto out; |
260fa034 | 7595 | } |
c731b84b DJ |
7596 | if (test_and_set_bit(MD_CLOSING, &mddev->flags)) { |
7597 | mutex_unlock(&mddev->open_mutex); | |
7598 | err = -EBUSY; | |
7599 | goto out; | |
7600 | } | |
065e519e | 7601 | did_set_md_closing = true; |
260fa034 N |
7602 | mutex_unlock(&mddev->open_mutex); |
7603 | sync_blockdev(bdev); | |
7604 | } | |
1da177e4 LT |
7605 | err = mddev_lock(mddev); |
7606 | if (err) { | |
9d48739e N |
7607 | pr_debug("md: ioctl lock interrupted, reason %d, cmd %d\n", |
7608 | err, cmd); | |
3adc28d8 | 7609 | goto out; |
1da177e4 LT |
7610 | } |
7611 | ||
c02c0aeb N |
7612 | if (cmd == SET_ARRAY_INFO) { |
7613 | mdu_array_info_t info; | |
7614 | if (!arg) | |
7615 | memset(&info, 0, sizeof(info)); | |
7616 | else if (copy_from_user(&info, argp, sizeof(info))) { | |
7617 | err = -EFAULT; | |
3adc28d8 | 7618 | goto unlock; |
c02c0aeb N |
7619 | } |
7620 | if (mddev->pers) { | |
7621 | err = update_array_info(mddev, &info); | |
7622 | if (err) { | |
9d48739e | 7623 | pr_warn("md: couldn't update array info. %d\n", err); |
3adc28d8 | 7624 | goto unlock; |
1da177e4 | 7625 | } |
3adc28d8 | 7626 | goto unlock; |
c02c0aeb N |
7627 | } |
7628 | if (!list_empty(&mddev->disks)) { | |
9d48739e | 7629 | pr_warn("md: array %s already has disks!\n", mdname(mddev)); |
c02c0aeb | 7630 | err = -EBUSY; |
3adc28d8 | 7631 | goto unlock; |
c02c0aeb N |
7632 | } |
7633 | if (mddev->raid_disks) { | |
9d48739e | 7634 | pr_warn("md: array %s already initialised!\n", mdname(mddev)); |
c02c0aeb | 7635 | err = -EBUSY; |
3adc28d8 | 7636 | goto unlock; |
c02c0aeb | 7637 | } |
7e0adbfc | 7638 | err = md_set_array_info(mddev, &info); |
c02c0aeb | 7639 | if (err) { |
9d48739e | 7640 | pr_warn("md: couldn't set array info. %d\n", err); |
3adc28d8 | 7641 | goto unlock; |
c02c0aeb | 7642 | } |
3adc28d8 | 7643 | goto unlock; |
1da177e4 LT |
7644 | } |
7645 | ||
7646 | /* | |
7647 | * Commands querying/configuring an existing array: | |
7648 | */ | |
32a7627c | 7649 | /* if we are not initialised yet, only ADD_NEW_DISK, STOP_ARRAY, |
3f9d7b0d | 7650 | * RUN_ARRAY, and GET_ and SET_BITMAP_FILE are allowed */ |
a17184a9 N |
7651 | if ((!mddev->raid_disks && !mddev->external) |
7652 | && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY | |
7653 | && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE | |
7654 | && cmd != GET_BITMAP_FILE) { | |
1da177e4 | 7655 | err = -ENODEV; |
3adc28d8 | 7656 | goto unlock; |
1da177e4 LT |
7657 | } |
7658 | ||
7659 | /* | |
7660 | * Commands even a read-only array can execute: | |
7661 | */ | |
c02c0aeb | 7662 | switch (cmd) { |
c02c0aeb N |
7663 | case RESTART_ARRAY_RW: |
7664 | err = restart_array(mddev); | |
3adc28d8 | 7665 | goto unlock; |
1da177e4 | 7666 | |
c02c0aeb N |
7667 | case STOP_ARRAY: |
7668 | err = do_md_stop(mddev, 0, bdev); | |
3adc28d8 | 7669 | goto unlock; |
1da177e4 | 7670 | |
c02c0aeb N |
7671 | case STOP_ARRAY_RO: |
7672 | err = md_set_readonly(mddev, bdev); | |
3adc28d8 | 7673 | goto unlock; |
1da177e4 | 7674 | |
3ea8929d N |
7675 | case HOT_REMOVE_DISK: |
7676 | err = hot_remove_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7677 | goto unlock; |
3ea8929d | 7678 | |
7ceb17e8 N |
7679 | case ADD_NEW_DISK: |
7680 | /* We can support ADD_NEW_DISK on read-only arrays | |
466ad292 | 7681 | * only if we are re-adding a preexisting device. |
7ceb17e8 N |
7682 | * So require mddev->pers and MD_DISK_SYNC. |
7683 | */ | |
7684 | if (mddev->pers) { | |
7685 | mdu_disk_info_t info; | |
7686 | if (copy_from_user(&info, argp, sizeof(info))) | |
7687 | err = -EFAULT; | |
7688 | else if (!(info.state & (1<<MD_DISK_SYNC))) | |
7689 | /* Need to clear read-only for this */ | |
7690 | break; | |
7691 | else | |
7e0adbfc | 7692 | err = md_add_new_disk(mddev, &info); |
3adc28d8 | 7693 | goto unlock; |
7ceb17e8 N |
7694 | } |
7695 | break; | |
1da177e4 LT |
7696 | } |
7697 | ||
7698 | /* | |
7699 | * The remaining ioctls are changing the state of the | |
f91de92e | 7700 | * superblock, so we do not allow them on read-only arrays. |
1da177e4 | 7701 | */ |
326eb17d | 7702 | if (mddev->ro && mddev->pers) { |
f91de92e N |
7703 | if (mddev->ro == 2) { |
7704 | mddev->ro = 0; | |
00bcb4ac | 7705 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 7706 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f3378b48 N |
7707 | /* mddev_unlock will wake thread */ |
7708 | /* If a device failed while we were read-only, we | |
7709 | * need to make sure the metadata is updated now. | |
7710 | */ | |
2953079c | 7711 | if (test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) { |
f3378b48 N |
7712 | mddev_unlock(mddev); |
7713 | wait_event(mddev->sb_wait, | |
2953079c SL |
7714 | !test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags) && |
7715 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); | |
29f097c4 | 7716 | mddev_lock_nointr(mddev); |
f3378b48 | 7717 | } |
f91de92e N |
7718 | } else { |
7719 | err = -EROFS; | |
3adc28d8 | 7720 | goto unlock; |
f91de92e | 7721 | } |
1da177e4 LT |
7722 | } |
7723 | ||
c02c0aeb N |
7724 | switch (cmd) { |
7725 | case ADD_NEW_DISK: | |
1da177e4 | 7726 | { |
c02c0aeb N |
7727 | mdu_disk_info_t info; |
7728 | if (copy_from_user(&info, argp, sizeof(info))) | |
7729 | err = -EFAULT; | |
7730 | else | |
7e0adbfc | 7731 | err = md_add_new_disk(mddev, &info); |
3adc28d8 | 7732 | goto unlock; |
c02c0aeb | 7733 | } |
1da177e4 | 7734 | |
1aee41f6 GR |
7735 | case CLUSTERED_DISK_NACK: |
7736 | if (mddev_is_clustered(mddev)) | |
7737 | md_cluster_ops->new_disk_ack(mddev, false); | |
7738 | else | |
7739 | err = -EINVAL; | |
7740 | goto unlock; | |
7741 | ||
c02c0aeb N |
7742 | case HOT_ADD_DISK: |
7743 | err = hot_add_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7744 | goto unlock; |
1da177e4 | 7745 | |
c02c0aeb N |
7746 | case RUN_ARRAY: |
7747 | err = do_md_run(mddev); | |
3adc28d8 | 7748 | goto unlock; |
1da177e4 | 7749 | |
c02c0aeb N |
7750 | case SET_BITMAP_FILE: |
7751 | err = set_bitmap_file(mddev, (int)arg); | |
3adc28d8 | 7752 | goto unlock; |
32a7627c | 7753 | |
c02c0aeb N |
7754 | default: |
7755 | err = -EINVAL; | |
3adc28d8 | 7756 | goto unlock; |
1da177e4 LT |
7757 | } |
7758 | ||
3adc28d8 | 7759 | unlock: |
d3374825 N |
7760 | if (mddev->hold_active == UNTIL_IOCTL && |
7761 | err != -EINVAL) | |
7762 | mddev->hold_active = 0; | |
1da177e4 | 7763 | mddev_unlock(mddev); |
3adc28d8 | 7764 | out: |
065e519e N |
7765 | if(did_set_md_closing) |
7766 | clear_bit(MD_CLOSING, &mddev->flags); | |
1da177e4 LT |
7767 | return err; |
7768 | } | |
aa98aa31 AB |
7769 | #ifdef CONFIG_COMPAT |
7770 | static int md_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
7771 | unsigned int cmd, unsigned long arg) | |
7772 | { | |
7773 | switch (cmd) { | |
7774 | case HOT_REMOVE_DISK: | |
7775 | case HOT_ADD_DISK: | |
7776 | case SET_DISK_FAULTY: | |
7777 | case SET_BITMAP_FILE: | |
7778 | /* These take in integer arg, do not convert */ | |
7779 | break; | |
7780 | default: | |
7781 | arg = (unsigned long)compat_ptr(arg); | |
7782 | break; | |
7783 | } | |
7784 | ||
7785 | return md_ioctl(bdev, mode, cmd, arg); | |
7786 | } | |
7787 | #endif /* CONFIG_COMPAT */ | |
1da177e4 | 7788 | |
118cf084 CH |
7789 | static int md_set_read_only(struct block_device *bdev, bool ro) |
7790 | { | |
7791 | struct mddev *mddev = bdev->bd_disk->private_data; | |
7792 | int err; | |
7793 | ||
7794 | err = mddev_lock(mddev); | |
7795 | if (err) | |
7796 | return err; | |
7797 | ||
7798 | if (!mddev->raid_disks && !mddev->external) { | |
7799 | err = -ENODEV; | |
7800 | goto out_unlock; | |
7801 | } | |
7802 | ||
7803 | /* | |
7804 | * Transitioning to read-auto need only happen for arrays that call | |
7805 | * md_write_start and which are not ready for writes yet. | |
7806 | */ | |
7807 | if (!ro && mddev->ro == 1 && mddev->pers) { | |
7808 | err = restart_array(mddev); | |
7809 | if (err) | |
7810 | goto out_unlock; | |
7811 | mddev->ro = 2; | |
7812 | } | |
7813 | ||
7814 | out_unlock: | |
7815 | mddev_unlock(mddev); | |
7816 | return err; | |
7817 | } | |
7818 | ||
a39907fa | 7819 | static int md_open(struct block_device *bdev, fmode_t mode) |
1da177e4 LT |
7820 | { |
7821 | /* | |
7822 | * Succeed if we can lock the mddev, which confirms that | |
7823 | * it isn't being stopped right now. | |
7824 | */ | |
fd01b88c | 7825 | struct mddev *mddev = mddev_find(bdev->bd_dev); |
1da177e4 LT |
7826 | int err; |
7827 | ||
0c098220 YL |
7828 | if (!mddev) |
7829 | return -ENODEV; | |
7830 | ||
d3374825 N |
7831 | if (mddev->gendisk != bdev->bd_disk) { |
7832 | /* we are racing with mddev_put which is discarding this | |
7833 | * bd_disk. | |
7834 | */ | |
7835 | mddev_put(mddev); | |
7836 | /* Wait until bdev->bd_disk is definitely gone */ | |
f6766ff6 GJ |
7837 | if (work_pending(&mddev->del_work)) |
7838 | flush_workqueue(md_misc_wq); | |
6a4db2a6 | 7839 | return -EBUSY; |
d3374825 N |
7840 | } |
7841 | BUG_ON(mddev != bdev->bd_disk->private_data); | |
7842 | ||
c8c00a69 | 7843 | if ((err = mutex_lock_interruptible(&mddev->open_mutex))) |
1da177e4 LT |
7844 | goto out; |
7845 | ||
af8d8e6f GJ |
7846 | if (test_bit(MD_CLOSING, &mddev->flags)) { |
7847 | mutex_unlock(&mddev->open_mutex); | |
e2342ca8 N |
7848 | err = -ENODEV; |
7849 | goto out; | |
af8d8e6f GJ |
7850 | } |
7851 | ||
1da177e4 | 7852 | err = 0; |
f2ea68cf | 7853 | atomic_inc(&mddev->openers); |
c8c00a69 | 7854 | mutex_unlock(&mddev->open_mutex); |
1da177e4 | 7855 | |
818077d6 | 7856 | bdev_check_media_change(bdev); |
1da177e4 | 7857 | out: |
e2342ca8 N |
7858 | if (err) |
7859 | mddev_put(mddev); | |
1da177e4 LT |
7860 | return err; |
7861 | } | |
7862 | ||
db2a144b | 7863 | static void md_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 7864 | { |
f72ffdd6 | 7865 | struct mddev *mddev = disk->private_data; |
1da177e4 | 7866 | |
52e5f9d1 | 7867 | BUG_ON(!mddev); |
f2ea68cf | 7868 | atomic_dec(&mddev->openers); |
1da177e4 | 7869 | mddev_put(mddev); |
1da177e4 | 7870 | } |
f0b4f7e2 | 7871 | |
a564e23f | 7872 | static unsigned int md_check_events(struct gendisk *disk, unsigned int clearing) |
f0b4f7e2 | 7873 | { |
fd01b88c | 7874 | struct mddev *mddev = disk->private_data; |
a564e23f | 7875 | unsigned int ret = 0; |
f0b4f7e2 | 7876 | |
a564e23f CH |
7877 | if (mddev->changed) |
7878 | ret = DISK_EVENT_MEDIA_CHANGE; | |
f0b4f7e2 | 7879 | mddev->changed = 0; |
a564e23f | 7880 | return ret; |
f0b4f7e2 | 7881 | } |
a564e23f | 7882 | |
7e0adbfc | 7883 | const struct block_device_operations md_fops = |
1da177e4 LT |
7884 | { |
7885 | .owner = THIS_MODULE, | |
c62b37d9 | 7886 | .submit_bio = md_submit_bio, |
a39907fa AV |
7887 | .open = md_open, |
7888 | .release = md_release, | |
b492b852 | 7889 | .ioctl = md_ioctl, |
aa98aa31 AB |
7890 | #ifdef CONFIG_COMPAT |
7891 | .compat_ioctl = md_compat_ioctl, | |
7892 | #endif | |
a885c8c4 | 7893 | .getgeo = md_getgeo, |
a564e23f | 7894 | .check_events = md_check_events, |
118cf084 | 7895 | .set_read_only = md_set_read_only, |
1da177e4 LT |
7896 | }; |
7897 | ||
f72ffdd6 | 7898 | static int md_thread(void *arg) |
1da177e4 | 7899 | { |
2b8bf345 | 7900 | struct md_thread *thread = arg; |
1da177e4 | 7901 | |
1da177e4 LT |
7902 | /* |
7903 | * md_thread is a 'system-thread', it's priority should be very | |
7904 | * high. We avoid resource deadlocks individually in each | |
7905 | * raid personality. (RAID5 does preallocation) We also use RR and | |
7906 | * the very same RT priority as kswapd, thus we will never get | |
7907 | * into a priority inversion deadlock. | |
7908 | * | |
7909 | * we definitely have to have equal or higher priority than | |
7910 | * bdflush, otherwise bdflush will deadlock if there are too | |
7911 | * many dirty RAID5 blocks. | |
7912 | */ | |
1da177e4 | 7913 | |
6985c43f | 7914 | allow_signal(SIGKILL); |
a6fb0934 | 7915 | while (!kthread_should_stop()) { |
1da177e4 | 7916 | |
93588e22 N |
7917 | /* We need to wait INTERRUPTIBLE so that |
7918 | * we don't add to the load-average. | |
7919 | * That means we need to be sure no signals are | |
7920 | * pending | |
7921 | */ | |
7922 | if (signal_pending(current)) | |
7923 | flush_signals(current); | |
7924 | ||
7925 | wait_event_interruptible_timeout | |
7926 | (thread->wqueue, | |
7927 | test_bit(THREAD_WAKEUP, &thread->flags) | |
ce1ccd07 | 7928 | || kthread_should_stop() || kthread_should_park(), |
93588e22 | 7929 | thread->timeout); |
1da177e4 | 7930 | |
6c987910 | 7931 | clear_bit(THREAD_WAKEUP, &thread->flags); |
ce1ccd07 SL |
7932 | if (kthread_should_park()) |
7933 | kthread_parkme(); | |
6c987910 | 7934 | if (!kthread_should_stop()) |
4ed8731d | 7935 | thread->run(thread); |
1da177e4 | 7936 | } |
a6fb0934 | 7937 | |
1da177e4 LT |
7938 | return 0; |
7939 | } | |
7940 | ||
2b8bf345 | 7941 | void md_wakeup_thread(struct md_thread *thread) |
1da177e4 LT |
7942 | { |
7943 | if (thread) { | |
36a4e1fe | 7944 | pr_debug("md: waking up MD thread %s.\n", thread->tsk->comm); |
d1d90147 GJ |
7945 | set_bit(THREAD_WAKEUP, &thread->flags); |
7946 | wake_up(&thread->wqueue); | |
1da177e4 LT |
7947 | } |
7948 | } | |
6c144d31 | 7949 | EXPORT_SYMBOL(md_wakeup_thread); |
1da177e4 | 7950 | |
4ed8731d SL |
7951 | struct md_thread *md_register_thread(void (*run) (struct md_thread *), |
7952 | struct mddev *mddev, const char *name) | |
1da177e4 | 7953 | { |
2b8bf345 | 7954 | struct md_thread *thread; |
1da177e4 | 7955 | |
2b8bf345 | 7956 | thread = kzalloc(sizeof(struct md_thread), GFP_KERNEL); |
1da177e4 LT |
7957 | if (!thread) |
7958 | return NULL; | |
7959 | ||
1da177e4 LT |
7960 | init_waitqueue_head(&thread->wqueue); |
7961 | ||
1da177e4 LT |
7962 | thread->run = run; |
7963 | thread->mddev = mddev; | |
32a7627c | 7964 | thread->timeout = MAX_SCHEDULE_TIMEOUT; |
0da3c619 N |
7965 | thread->tsk = kthread_run(md_thread, thread, |
7966 | "%s_%s", | |
7967 | mdname(thread->mddev), | |
0232605d | 7968 | name); |
a6fb0934 | 7969 | if (IS_ERR(thread->tsk)) { |
1da177e4 LT |
7970 | kfree(thread); |
7971 | return NULL; | |
7972 | } | |
1da177e4 LT |
7973 | return thread; |
7974 | } | |
6c144d31 | 7975 | EXPORT_SYMBOL(md_register_thread); |
1da177e4 | 7976 | |
2b8bf345 | 7977 | void md_unregister_thread(struct md_thread **threadp) |
1da177e4 | 7978 | { |
2b8bf345 | 7979 | struct md_thread *thread = *threadp; |
e0cf8f04 N |
7980 | if (!thread) |
7981 | return; | |
36a4e1fe | 7982 | pr_debug("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk)); |
01f96c0a N |
7983 | /* Locking ensures that mddev_unlock does not wake_up a |
7984 | * non-existent thread | |
7985 | */ | |
7986 | spin_lock(&pers_lock); | |
7987 | *threadp = NULL; | |
7988 | spin_unlock(&pers_lock); | |
a6fb0934 N |
7989 | |
7990 | kthread_stop(thread->tsk); | |
1da177e4 LT |
7991 | kfree(thread); |
7992 | } | |
6c144d31 | 7993 | EXPORT_SYMBOL(md_unregister_thread); |
1da177e4 | 7994 | |
fd01b88c | 7995 | void md_error(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 7996 | { |
b2d444d7 | 7997 | if (!rdev || test_bit(Faulty, &rdev->flags)) |
1da177e4 | 7998 | return; |
6bfe0b49 | 7999 | |
de393cde | 8000 | if (!mddev->pers || !mddev->pers->error_handler) |
1da177e4 LT |
8001 | return; |
8002 | mddev->pers->error_handler(mddev,rdev); | |
72a23c21 NB |
8003 | if (mddev->degraded) |
8004 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
00bcb4ac | 8005 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
8006 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8007 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8008 | md_wakeup_thread(mddev->thread); | |
768a418d | 8009 | if (mddev->event_work.func) |
e804ac78 | 8010 | queue_work(md_misc_wq, &mddev->event_work); |
bb9ef716 | 8011 | md_new_event(mddev); |
1da177e4 | 8012 | } |
6c144d31 | 8013 | EXPORT_SYMBOL(md_error); |
1da177e4 LT |
8014 | |
8015 | /* seq_file implementation /proc/mdstat */ | |
8016 | ||
8017 | static void status_unused(struct seq_file *seq) | |
8018 | { | |
8019 | int i = 0; | |
3cb03002 | 8020 | struct md_rdev *rdev; |
1da177e4 LT |
8021 | |
8022 | seq_printf(seq, "unused devices: "); | |
8023 | ||
159ec1fc | 8024 | list_for_each_entry(rdev, &pending_raid_disks, same_set) { |
1da177e4 LT |
8025 | char b[BDEVNAME_SIZE]; |
8026 | i++; | |
8027 | seq_printf(seq, "%s ", | |
8028 | bdevname(rdev->bdev,b)); | |
8029 | } | |
8030 | if (!i) | |
8031 | seq_printf(seq, "<none>"); | |
8032 | ||
8033 | seq_printf(seq, "\n"); | |
8034 | } | |
8035 | ||
f7851be7 | 8036 | static int status_resync(struct seq_file *seq, struct mddev *mddev) |
1da177e4 | 8037 | { |
dd71cf6b | 8038 | sector_t max_sectors, resync, res; |
9642fa73 MT |
8039 | unsigned long dt, db = 0; |
8040 | sector_t rt, curr_mark_cnt, resync_mark_cnt; | |
8041 | int scale, recovery_active; | |
4588b42e | 8042 | unsigned int per_milli; |
1da177e4 | 8043 | |
c804cdec N |
8044 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8045 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
dd71cf6b | 8046 | max_sectors = mddev->resync_max_sectors; |
1da177e4 | 8047 | else |
dd71cf6b | 8048 | max_sectors = mddev->dev_sectors; |
1da177e4 | 8049 | |
f7851be7 N |
8050 | resync = mddev->curr_resync; |
8051 | if (resync <= 3) { | |
8052 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) | |
8053 | /* Still cleaning up */ | |
8054 | resync = max_sectors; | |
d2e2ec82 ND |
8055 | } else if (resync > max_sectors) |
8056 | resync = max_sectors; | |
8057 | else | |
f7851be7 N |
8058 | resync -= atomic_read(&mddev->recovery_active); |
8059 | ||
8060 | if (resync == 0) { | |
0357ba27 GJ |
8061 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery)) { |
8062 | struct md_rdev *rdev; | |
8063 | ||
8064 | rdev_for_each(rdev, mddev) | |
8065 | if (rdev->raid_disk >= 0 && | |
8066 | !test_bit(Faulty, &rdev->flags) && | |
8067 | rdev->recovery_offset != MaxSector && | |
8068 | rdev->recovery_offset) { | |
8069 | seq_printf(seq, "\trecover=REMOTE"); | |
8070 | return 1; | |
8071 | } | |
8072 | if (mddev->reshape_position != MaxSector) | |
8073 | seq_printf(seq, "\treshape=REMOTE"); | |
8074 | else | |
8075 | seq_printf(seq, "\tresync=REMOTE"); | |
8076 | return 1; | |
8077 | } | |
f7851be7 N |
8078 | if (mddev->recovery_cp < MaxSector) { |
8079 | seq_printf(seq, "\tresync=PENDING"); | |
8080 | return 1; | |
8081 | } | |
8082 | return 0; | |
8083 | } | |
8084 | if (resync < 3) { | |
8085 | seq_printf(seq, "\tresync=DELAYED"); | |
8086 | return 1; | |
8087 | } | |
8088 | ||
403df478 | 8089 | WARN_ON(max_sectors == 0); |
4588b42e | 8090 | /* Pick 'scale' such that (resync>>scale)*1000 will fit |
dd71cf6b | 8091 | * in a sector_t, and (max_sectors>>scale) will fit in a |
4588b42e N |
8092 | * u32, as those are the requirements for sector_div. |
8093 | * Thus 'scale' must be at least 10 | |
8094 | */ | |
8095 | scale = 10; | |
8096 | if (sizeof(sector_t) > sizeof(unsigned long)) { | |
dd71cf6b | 8097 | while ( max_sectors/2 > (1ULL<<(scale+32))) |
4588b42e N |
8098 | scale++; |
8099 | } | |
8100 | res = (resync>>scale)*1000; | |
dd71cf6b | 8101 | sector_div(res, (u32)((max_sectors>>scale)+1)); |
4588b42e N |
8102 | |
8103 | per_milli = res; | |
1da177e4 | 8104 | { |
4588b42e | 8105 | int i, x = per_milli/50, y = 20-x; |
1da177e4 LT |
8106 | seq_printf(seq, "["); |
8107 | for (i = 0; i < x; i++) | |
8108 | seq_printf(seq, "="); | |
8109 | seq_printf(seq, ">"); | |
8110 | for (i = 0; i < y; i++) | |
8111 | seq_printf(seq, "."); | |
8112 | seq_printf(seq, "] "); | |
8113 | } | |
4588b42e | 8114 | seq_printf(seq, " %s =%3u.%u%% (%llu/%llu)", |
ccfcc3c1 N |
8115 | (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)? |
8116 | "reshape" : | |
61df9d91 N |
8117 | (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)? |
8118 | "check" : | |
8119 | (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? | |
8120 | "resync" : "recovery"))), | |
8121 | per_milli/10, per_milli % 10, | |
dd71cf6b N |
8122 | (unsigned long long) resync/2, |
8123 | (unsigned long long) max_sectors/2); | |
1da177e4 LT |
8124 | |
8125 | /* | |
1da177e4 LT |
8126 | * dt: time from mark until now |
8127 | * db: blocks written from mark until now | |
8128 | * rt: remaining time | |
dd71cf6b | 8129 | * |
9642fa73 MT |
8130 | * rt is a sector_t, which is always 64bit now. We are keeping |
8131 | * the original algorithm, but it is not really necessary. | |
8132 | * | |
8133 | * Original algorithm: | |
8134 | * So we divide before multiply in case it is 32bit and close | |
8135 | * to the limit. | |
8136 | * We scale the divisor (db) by 32 to avoid losing precision | |
8137 | * near the end of resync when the number of remaining sectors | |
8138 | * is close to 'db'. | |
8139 | * We then divide rt by 32 after multiplying by db to compensate. | |
8140 | * The '+1' avoids division by zero if db is very small. | |
1da177e4 LT |
8141 | */ |
8142 | dt = ((jiffies - mddev->resync_mark) / HZ); | |
8143 | if (!dt) dt++; | |
9642fa73 MT |
8144 | |
8145 | curr_mark_cnt = mddev->curr_mark_cnt; | |
8146 | recovery_active = atomic_read(&mddev->recovery_active); | |
8147 | resync_mark_cnt = mddev->resync_mark_cnt; | |
8148 | ||
8149 | if (curr_mark_cnt >= (recovery_active + resync_mark_cnt)) | |
8150 | db = curr_mark_cnt - (recovery_active + resync_mark_cnt); | |
1da177e4 | 8151 | |
dd71cf6b | 8152 | rt = max_sectors - resync; /* number of remaining sectors */ |
9642fa73 | 8153 | rt = div64_u64(rt, db/32+1); |
dd71cf6b N |
8154 | rt *= dt; |
8155 | rt >>= 5; | |
8156 | ||
8157 | seq_printf(seq, " finish=%lu.%lumin", (unsigned long)rt / 60, | |
8158 | ((unsigned long)rt % 60)/6); | |
1da177e4 | 8159 | |
ff4e8d9a | 8160 | seq_printf(seq, " speed=%ldK/sec", db/2/dt); |
f7851be7 | 8161 | return 1; |
1da177e4 LT |
8162 | } |
8163 | ||
8164 | static void *md_seq_start(struct seq_file *seq, loff_t *pos) | |
8165 | { | |
8166 | struct list_head *tmp; | |
8167 | loff_t l = *pos; | |
fd01b88c | 8168 | struct mddev *mddev; |
1da177e4 | 8169 | |
7abfabaf JG |
8170 | if (l == 0x10000) { |
8171 | ++*pos; | |
8172 | return (void *)2; | |
8173 | } | |
8174 | if (l > 0x10000) | |
1da177e4 LT |
8175 | return NULL; |
8176 | if (!l--) | |
8177 | /* header */ | |
8178 | return (void*)1; | |
8179 | ||
8180 | spin_lock(&all_mddevs_lock); | |
8181 | list_for_each(tmp,&all_mddevs) | |
8182 | if (!l--) { | |
fd01b88c | 8183 | mddev = list_entry(tmp, struct mddev, all_mddevs); |
1da177e4 LT |
8184 | mddev_get(mddev); |
8185 | spin_unlock(&all_mddevs_lock); | |
8186 | return mddev; | |
8187 | } | |
8188 | spin_unlock(&all_mddevs_lock); | |
8189 | if (!l--) | |
8190 | return (void*)2;/* tail */ | |
8191 | return NULL; | |
8192 | } | |
8193 | ||
8194 | static void *md_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
8195 | { | |
8196 | struct list_head *tmp; | |
fd01b88c | 8197 | struct mddev *next_mddev, *mddev = v; |
f72ffdd6 | 8198 | |
1da177e4 LT |
8199 | ++*pos; |
8200 | if (v == (void*)2) | |
8201 | return NULL; | |
8202 | ||
8203 | spin_lock(&all_mddevs_lock); | |
8204 | if (v == (void*)1) | |
8205 | tmp = all_mddevs.next; | |
8206 | else | |
8207 | tmp = mddev->all_mddevs.next; | |
8208 | if (tmp != &all_mddevs) | |
fd01b88c | 8209 | next_mddev = mddev_get(list_entry(tmp,struct mddev,all_mddevs)); |
1da177e4 LT |
8210 | else { |
8211 | next_mddev = (void*)2; | |
8212 | *pos = 0x10000; | |
f72ffdd6 | 8213 | } |
1da177e4 LT |
8214 | spin_unlock(&all_mddevs_lock); |
8215 | ||
8216 | if (v != (void*)1) | |
8217 | mddev_put(mddev); | |
8218 | return next_mddev; | |
8219 | ||
8220 | } | |
8221 | ||
8222 | static void md_seq_stop(struct seq_file *seq, void *v) | |
8223 | { | |
fd01b88c | 8224 | struct mddev *mddev = v; |
1da177e4 LT |
8225 | |
8226 | if (mddev && v != (void*)1 && v != (void*)2) | |
8227 | mddev_put(mddev); | |
8228 | } | |
8229 | ||
8230 | static int md_seq_show(struct seq_file *seq, void *v) | |
8231 | { | |
fd01b88c | 8232 | struct mddev *mddev = v; |
dd8ac336 | 8233 | sector_t sectors; |
3cb03002 | 8234 | struct md_rdev *rdev; |
1da177e4 LT |
8235 | |
8236 | if (v == (void*)1) { | |
84fc4b56 | 8237 | struct md_personality *pers; |
1da177e4 LT |
8238 | seq_printf(seq, "Personalities : "); |
8239 | spin_lock(&pers_lock); | |
2604b703 N |
8240 | list_for_each_entry(pers, &pers_list, list) |
8241 | seq_printf(seq, "[%s] ", pers->name); | |
1da177e4 LT |
8242 | |
8243 | spin_unlock(&pers_lock); | |
8244 | seq_printf(seq, "\n"); | |
f1514638 | 8245 | seq->poll_event = atomic_read(&md_event_count); |
1da177e4 LT |
8246 | return 0; |
8247 | } | |
8248 | if (v == (void*)2) { | |
8249 | status_unused(seq); | |
8250 | return 0; | |
8251 | } | |
8252 | ||
36d091f4 | 8253 | spin_lock(&mddev->lock); |
1da177e4 LT |
8254 | if (mddev->pers || mddev->raid_disks || !list_empty(&mddev->disks)) { |
8255 | seq_printf(seq, "%s : %sactive", mdname(mddev), | |
8256 | mddev->pers ? "" : "in"); | |
8257 | if (mddev->pers) { | |
f91de92e | 8258 | if (mddev->ro==1) |
1da177e4 | 8259 | seq_printf(seq, " (read-only)"); |
f91de92e | 8260 | if (mddev->ro==2) |
52720ae7 | 8261 | seq_printf(seq, " (auto-read-only)"); |
1da177e4 LT |
8262 | seq_printf(seq, " %s", mddev->pers->name); |
8263 | } | |
8264 | ||
dd8ac336 | 8265 | sectors = 0; |
f97fcad3 N |
8266 | rcu_read_lock(); |
8267 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 LT |
8268 | char b[BDEVNAME_SIZE]; |
8269 | seq_printf(seq, " %s[%d]", | |
8270 | bdevname(rdev->bdev,b), rdev->desc_nr); | |
8ddf9efe N |
8271 | if (test_bit(WriteMostly, &rdev->flags)) |
8272 | seq_printf(seq, "(W)"); | |
9efdca16 SL |
8273 | if (test_bit(Journal, &rdev->flags)) |
8274 | seq_printf(seq, "(J)"); | |
b2d444d7 | 8275 | if (test_bit(Faulty, &rdev->flags)) { |
1da177e4 LT |
8276 | seq_printf(seq, "(F)"); |
8277 | continue; | |
2d78f8c4 N |
8278 | } |
8279 | if (rdev->raid_disk < 0) | |
b325a32e | 8280 | seq_printf(seq, "(S)"); /* spare */ |
2d78f8c4 N |
8281 | if (test_bit(Replacement, &rdev->flags)) |
8282 | seq_printf(seq, "(R)"); | |
dd8ac336 | 8283 | sectors += rdev->sectors; |
1da177e4 | 8284 | } |
f97fcad3 | 8285 | rcu_read_unlock(); |
1da177e4 LT |
8286 | |
8287 | if (!list_empty(&mddev->disks)) { | |
8288 | if (mddev->pers) | |
8289 | seq_printf(seq, "\n %llu blocks", | |
f233ea5c AN |
8290 | (unsigned long long) |
8291 | mddev->array_sectors / 2); | |
1da177e4 LT |
8292 | else |
8293 | seq_printf(seq, "\n %llu blocks", | |
dd8ac336 | 8294 | (unsigned long long)sectors / 2); |
1da177e4 | 8295 | } |
1cd6bf19 N |
8296 | if (mddev->persistent) { |
8297 | if (mddev->major_version != 0 || | |
8298 | mddev->minor_version != 90) { | |
8299 | seq_printf(seq," super %d.%d", | |
8300 | mddev->major_version, | |
8301 | mddev->minor_version); | |
8302 | } | |
e691063a N |
8303 | } else if (mddev->external) |
8304 | seq_printf(seq, " super external:%s", | |
8305 | mddev->metadata_type); | |
8306 | else | |
1cd6bf19 | 8307 | seq_printf(seq, " super non-persistent"); |
1da177e4 LT |
8308 | |
8309 | if (mddev->pers) { | |
d710e138 | 8310 | mddev->pers->status(seq, mddev); |
f72ffdd6 | 8311 | seq_printf(seq, "\n "); |
8e1b39d6 | 8312 | if (mddev->pers->sync_request) { |
f7851be7 | 8313 | if (status_resync(seq, mddev)) |
8e1b39d6 | 8314 | seq_printf(seq, "\n "); |
8e1b39d6 | 8315 | } |
32a7627c N |
8316 | } else |
8317 | seq_printf(seq, "\n "); | |
8318 | ||
e64e4018 | 8319 | md_bitmap_status(seq, mddev->bitmap); |
1da177e4 LT |
8320 | |
8321 | seq_printf(seq, "\n"); | |
8322 | } | |
36d091f4 | 8323 | spin_unlock(&mddev->lock); |
f72ffdd6 | 8324 | |
1da177e4 LT |
8325 | return 0; |
8326 | } | |
8327 | ||
110518bc | 8328 | static const struct seq_operations md_seq_ops = { |
1da177e4 LT |
8329 | .start = md_seq_start, |
8330 | .next = md_seq_next, | |
8331 | .stop = md_seq_stop, | |
8332 | .show = md_seq_show, | |
8333 | }; | |
8334 | ||
8335 | static int md_seq_open(struct inode *inode, struct file *file) | |
8336 | { | |
f1514638 | 8337 | struct seq_file *seq; |
1da177e4 LT |
8338 | int error; |
8339 | ||
8340 | error = seq_open(file, &md_seq_ops); | |
d7603b7e | 8341 | if (error) |
f1514638 KS |
8342 | return error; |
8343 | ||
8344 | seq = file->private_data; | |
8345 | seq->poll_event = atomic_read(&md_event_count); | |
1da177e4 LT |
8346 | return error; |
8347 | } | |
8348 | ||
e2f23b60 | 8349 | static int md_unloading; |
afc9a42b | 8350 | static __poll_t mdstat_poll(struct file *filp, poll_table *wait) |
d7603b7e | 8351 | { |
f1514638 | 8352 | struct seq_file *seq = filp->private_data; |
afc9a42b | 8353 | __poll_t mask; |
d7603b7e | 8354 | |
e2f23b60 | 8355 | if (md_unloading) |
a9a08845 | 8356 | return EPOLLIN|EPOLLRDNORM|EPOLLERR|EPOLLPRI; |
d7603b7e N |
8357 | poll_wait(filp, &md_event_waiters, wait); |
8358 | ||
8359 | /* always allow read */ | |
a9a08845 | 8360 | mask = EPOLLIN | EPOLLRDNORM; |
d7603b7e | 8361 | |
f1514638 | 8362 | if (seq->poll_event != atomic_read(&md_event_count)) |
a9a08845 | 8363 | mask |= EPOLLERR | EPOLLPRI; |
d7603b7e N |
8364 | return mask; |
8365 | } | |
8366 | ||
97a32539 AD |
8367 | static const struct proc_ops mdstat_proc_ops = { |
8368 | .proc_open = md_seq_open, | |
8369 | .proc_read = seq_read, | |
8370 | .proc_lseek = seq_lseek, | |
8371 | .proc_release = seq_release, | |
8372 | .proc_poll = mdstat_poll, | |
1da177e4 LT |
8373 | }; |
8374 | ||
84fc4b56 | 8375 | int register_md_personality(struct md_personality *p) |
1da177e4 | 8376 | { |
9d48739e N |
8377 | pr_debug("md: %s personality registered for level %d\n", |
8378 | p->name, p->level); | |
1da177e4 | 8379 | spin_lock(&pers_lock); |
2604b703 | 8380 | list_add_tail(&p->list, &pers_list); |
1da177e4 LT |
8381 | spin_unlock(&pers_lock); |
8382 | return 0; | |
8383 | } | |
6c144d31 | 8384 | EXPORT_SYMBOL(register_md_personality); |
1da177e4 | 8385 | |
84fc4b56 | 8386 | int unregister_md_personality(struct md_personality *p) |
1da177e4 | 8387 | { |
9d48739e | 8388 | pr_debug("md: %s personality unregistered\n", p->name); |
1da177e4 | 8389 | spin_lock(&pers_lock); |
2604b703 | 8390 | list_del_init(&p->list); |
1da177e4 LT |
8391 | spin_unlock(&pers_lock); |
8392 | return 0; | |
8393 | } | |
6c144d31 | 8394 | EXPORT_SYMBOL(unregister_md_personality); |
1da177e4 | 8395 | |
6022e75b N |
8396 | int register_md_cluster_operations(struct md_cluster_operations *ops, |
8397 | struct module *module) | |
edb39c9d | 8398 | { |
6022e75b | 8399 | int ret = 0; |
edb39c9d | 8400 | spin_lock(&pers_lock); |
6022e75b N |
8401 | if (md_cluster_ops != NULL) |
8402 | ret = -EALREADY; | |
8403 | else { | |
8404 | md_cluster_ops = ops; | |
8405 | md_cluster_mod = module; | |
8406 | } | |
edb39c9d | 8407 | spin_unlock(&pers_lock); |
6022e75b | 8408 | return ret; |
edb39c9d GR |
8409 | } |
8410 | EXPORT_SYMBOL(register_md_cluster_operations); | |
8411 | ||
8412 | int unregister_md_cluster_operations(void) | |
8413 | { | |
8414 | spin_lock(&pers_lock); | |
8415 | md_cluster_ops = NULL; | |
8416 | spin_unlock(&pers_lock); | |
8417 | return 0; | |
8418 | } | |
8419 | EXPORT_SYMBOL(unregister_md_cluster_operations); | |
8420 | ||
8421 | int md_setup_cluster(struct mddev *mddev, int nodes) | |
8422 | { | |
7c9d5c54 | 8423 | int ret; |
47a7b0d8 GJ |
8424 | if (!md_cluster_ops) |
8425 | request_module("md-cluster"); | |
edb39c9d | 8426 | spin_lock(&pers_lock); |
47a7b0d8 | 8427 | /* ensure module won't be unloaded */ |
edb39c9d | 8428 | if (!md_cluster_ops || !try_module_get(md_cluster_mod)) { |
9d48739e | 8429 | pr_warn("can't find md-cluster module or get it's reference.\n"); |
edb39c9d GR |
8430 | spin_unlock(&pers_lock); |
8431 | return -ENOENT; | |
8432 | } | |
8433 | spin_unlock(&pers_lock); | |
8434 | ||
7c9d5c54 ZH |
8435 | ret = md_cluster_ops->join(mddev, nodes); |
8436 | if (!ret) | |
8437 | mddev->safemode_delay = 0; | |
8438 | return ret; | |
edb39c9d GR |
8439 | } |
8440 | ||
8441 | void md_cluster_stop(struct mddev *mddev) | |
8442 | { | |
c4ce867f GR |
8443 | if (!md_cluster_ops) |
8444 | return; | |
edb39c9d GR |
8445 | md_cluster_ops->leave(mddev); |
8446 | module_put(md_cluster_mod); | |
8447 | } | |
8448 | ||
fd01b88c | 8449 | static int is_mddev_idle(struct mddev *mddev, int init) |
1da177e4 | 8450 | { |
f72ffdd6 | 8451 | struct md_rdev *rdev; |
1da177e4 | 8452 | int idle; |
eea1bf38 | 8453 | int curr_events; |
1da177e4 LT |
8454 | |
8455 | idle = 1; | |
4b80991c N |
8456 | rcu_read_lock(); |
8457 | rdev_for_each_rcu(rdev, mddev) { | |
4245e52d | 8458 | struct gendisk *disk = rdev->bdev->bd_disk; |
8446fe92 | 8459 | curr_events = (int)part_stat_read_accum(disk->part0, sectors) - |
eea1bf38 | 8460 | atomic_read(&disk->sync_io); |
713f6ab1 N |
8461 | /* sync IO will cause sync_io to increase before the disk_stats |
8462 | * as sync_io is counted when a request starts, and | |
8463 | * disk_stats is counted when it completes. | |
8464 | * So resync activity will cause curr_events to be smaller than | |
8465 | * when there was no such activity. | |
8466 | * non-sync IO will cause disk_stat to increase without | |
8467 | * increasing sync_io so curr_events will (eventually) | |
8468 | * be larger than it was before. Once it becomes | |
8469 | * substantially larger, the test below will cause | |
8470 | * the array to appear non-idle, and resync will slow | |
8471 | * down. | |
8472 | * If there is a lot of outstanding resync activity when | |
8473 | * we set last_event to curr_events, then all that activity | |
8474 | * completing might cause the array to appear non-idle | |
8475 | * and resync will be slowed down even though there might | |
8476 | * not have been non-resync activity. This will only | |
8477 | * happen once though. 'last_events' will soon reflect | |
8478 | * the state where there is little or no outstanding | |
8479 | * resync requests, and further resync activity will | |
8480 | * always make curr_events less than last_events. | |
c0e48521 | 8481 | * |
1da177e4 | 8482 | */ |
eea1bf38 | 8483 | if (init || curr_events - rdev->last_events > 64) { |
1da177e4 LT |
8484 | rdev->last_events = curr_events; |
8485 | idle = 0; | |
8486 | } | |
8487 | } | |
4b80991c | 8488 | rcu_read_unlock(); |
1da177e4 LT |
8489 | return idle; |
8490 | } | |
8491 | ||
fd01b88c | 8492 | void md_done_sync(struct mddev *mddev, int blocks, int ok) |
1da177e4 LT |
8493 | { |
8494 | /* another "blocks" (512byte) blocks have been synced */ | |
8495 | atomic_sub(blocks, &mddev->recovery_active); | |
8496 | wake_up(&mddev->recovery_wait); | |
8497 | if (!ok) { | |
dfc70645 | 8498 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
0a19caab | 8499 | set_bit(MD_RECOVERY_ERROR, &mddev->recovery); |
1da177e4 LT |
8500 | md_wakeup_thread(mddev->thread); |
8501 | // stop recovery, signal do_sync .... | |
8502 | } | |
8503 | } | |
6c144d31 | 8504 | EXPORT_SYMBOL(md_done_sync); |
1da177e4 | 8505 | |
06d91a5f N |
8506 | /* md_write_start(mddev, bi) |
8507 | * If we need to update some array metadata (e.g. 'active' flag | |
3d310eb7 N |
8508 | * in superblock) before writing, schedule a superblock update |
8509 | * and wait for it to complete. | |
cc27b0c7 N |
8510 | * A return value of 'false' means that the write wasn't recorded |
8511 | * and cannot proceed as the array is being suspend. | |
06d91a5f | 8512 | */ |
cc27b0c7 | 8513 | bool md_write_start(struct mddev *mddev, struct bio *bi) |
1da177e4 | 8514 | { |
0fd62b86 | 8515 | int did_change = 0; |
4b6c1060 | 8516 | |
06d91a5f | 8517 | if (bio_data_dir(bi) != WRITE) |
cc27b0c7 | 8518 | return true; |
06d91a5f | 8519 | |
f91de92e N |
8520 | BUG_ON(mddev->ro == 1); |
8521 | if (mddev->ro == 2) { | |
8522 | /* need to switch to read/write */ | |
8523 | mddev->ro = 0; | |
8524 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8525 | md_wakeup_thread(mddev->thread); | |
25156198 | 8526 | md_wakeup_thread(mddev->sync_thread); |
0fd62b86 | 8527 | did_change = 1; |
f91de92e | 8528 | } |
4ad23a97 N |
8529 | rcu_read_lock(); |
8530 | percpu_ref_get(&mddev->writes_pending); | |
55cc39f3 | 8531 | smp_mb(); /* Match smp_mb in set_in_sync() */ |
31a59e34 N |
8532 | if (mddev->safemode == 1) |
8533 | mddev->safemode = 0; | |
4ad23a97 | 8534 | /* sync_checkers is always 0 when writes_pending is in per-cpu mode */ |
81fe48e9 | 8535 | if (mddev->in_sync || mddev->sync_checkers) { |
85572d7c | 8536 | spin_lock(&mddev->lock); |
3d310eb7 N |
8537 | if (mddev->in_sync) { |
8538 | mddev->in_sync = 0; | |
2953079c SL |
8539 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8540 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
3d310eb7 | 8541 | md_wakeup_thread(mddev->thread); |
0fd62b86 | 8542 | did_change = 1; |
3d310eb7 | 8543 | } |
85572d7c | 8544 | spin_unlock(&mddev->lock); |
06d91a5f | 8545 | } |
4ad23a97 | 8546 | rcu_read_unlock(); |
0fd62b86 | 8547 | if (did_change) |
00bcb4ac | 8548 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
4b6c1060 HM |
8549 | if (!mddev->has_superblocks) |
8550 | return true; | |
09a44cc1 | 8551 | wait_event(mddev->sb_wait, |
d47c8ad2 N |
8552 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags) || |
8553 | mddev->suspended); | |
cc27b0c7 N |
8554 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) { |
8555 | percpu_ref_put(&mddev->writes_pending); | |
8556 | return false; | |
8557 | } | |
8558 | return true; | |
1da177e4 | 8559 | } |
6c144d31 | 8560 | EXPORT_SYMBOL(md_write_start); |
1da177e4 | 8561 | |
49728050 N |
8562 | /* md_write_inc can only be called when md_write_start() has |
8563 | * already been called at least once of the current request. | |
8564 | * It increments the counter and is useful when a single request | |
8565 | * is split into several parts. Each part causes an increment and | |
8566 | * so needs a matching md_write_end(). | |
8567 | * Unlike md_write_start(), it is safe to call md_write_inc() inside | |
8568 | * a spinlocked region. | |
8569 | */ | |
8570 | void md_write_inc(struct mddev *mddev, struct bio *bi) | |
8571 | { | |
8572 | if (bio_data_dir(bi) != WRITE) | |
8573 | return; | |
8574 | WARN_ON_ONCE(mddev->in_sync || mddev->ro); | |
4ad23a97 | 8575 | percpu_ref_get(&mddev->writes_pending); |
49728050 N |
8576 | } |
8577 | EXPORT_SYMBOL(md_write_inc); | |
8578 | ||
fd01b88c | 8579 | void md_write_end(struct mddev *mddev) |
1da177e4 | 8580 | { |
4ad23a97 N |
8581 | percpu_ref_put(&mddev->writes_pending); |
8582 | ||
8583 | if (mddev->safemode == 2) | |
8584 | md_wakeup_thread(mddev->thread); | |
8585 | else if (mddev->safemode_delay) | |
8586 | /* The roundup() ensures this only performs locking once | |
8587 | * every ->safemode_delay jiffies | |
8588 | */ | |
8589 | mod_timer(&mddev->safemode_timer, | |
8590 | roundup(jiffies, mddev->safemode_delay) + | |
8591 | mddev->safemode_delay); | |
1da177e4 | 8592 | } |
4ad23a97 | 8593 | |
6c144d31 | 8594 | EXPORT_SYMBOL(md_write_end); |
1da177e4 | 8595 | |
cf78408f XN |
8596 | /* This is used by raid0 and raid10 */ |
8597 | void md_submit_discard_bio(struct mddev *mddev, struct md_rdev *rdev, | |
8598 | struct bio *bio, sector_t start, sector_t size) | |
8599 | { | |
8600 | struct bio *discard_bio = NULL; | |
8601 | ||
8602 | if (__blkdev_issue_discard(rdev->bdev, start, size, GFP_NOIO, 0, | |
8603 | &discard_bio) || !discard_bio) | |
8604 | return; | |
8605 | ||
8606 | bio_chain(discard_bio, bio); | |
8607 | bio_clone_blkg_association(discard_bio, bio); | |
8608 | if (mddev->gendisk) | |
8609 | trace_block_bio_remap(discard_bio, | |
8610 | disk_devt(mddev->gendisk), | |
8611 | bio->bi_iter.bi_sector); | |
8612 | submit_bio_noacct(discard_bio); | |
8613 | } | |
8614 | EXPORT_SYMBOL_GPL(md_submit_discard_bio); | |
8615 | ||
2a2275d6 N |
8616 | /* md_allow_write(mddev) |
8617 | * Calling this ensures that the array is marked 'active' so that writes | |
8618 | * may proceed without blocking. It is important to call this before | |
8619 | * attempting a GFP_KERNEL allocation while holding the mddev lock. | |
8620 | * Must be called with mddev_lock held. | |
8621 | */ | |
2214c260 | 8622 | void md_allow_write(struct mddev *mddev) |
2a2275d6 N |
8623 | { |
8624 | if (!mddev->pers) | |
2214c260 | 8625 | return; |
2a2275d6 | 8626 | if (mddev->ro) |
2214c260 | 8627 | return; |
1a0fd497 | 8628 | if (!mddev->pers->sync_request) |
2214c260 | 8629 | return; |
2a2275d6 | 8630 | |
85572d7c | 8631 | spin_lock(&mddev->lock); |
2a2275d6 N |
8632 | if (mddev->in_sync) { |
8633 | mddev->in_sync = 0; | |
2953079c SL |
8634 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8635 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
2a2275d6 N |
8636 | if (mddev->safemode_delay && |
8637 | mddev->safemode == 0) | |
8638 | mddev->safemode = 1; | |
85572d7c | 8639 | spin_unlock(&mddev->lock); |
2a2275d6 | 8640 | md_update_sb(mddev, 0); |
00bcb4ac | 8641 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
2214c260 AP |
8642 | /* wait for the dirty state to be recorded in the metadata */ |
8643 | wait_event(mddev->sb_wait, | |
2214c260 | 8644 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
2a2275d6 | 8645 | } else |
85572d7c | 8646 | spin_unlock(&mddev->lock); |
2a2275d6 N |
8647 | } |
8648 | EXPORT_SYMBOL_GPL(md_allow_write); | |
8649 | ||
1da177e4 LT |
8650 | #define SYNC_MARKS 10 |
8651 | #define SYNC_MARK_STEP (3*HZ) | |
54f89341 | 8652 | #define UPDATE_FREQUENCY (5*60*HZ) |
4ed8731d | 8653 | void md_do_sync(struct md_thread *thread) |
1da177e4 | 8654 | { |
4ed8731d | 8655 | struct mddev *mddev = thread->mddev; |
fd01b88c | 8656 | struct mddev *mddev2; |
e5b521ee | 8657 | unsigned int currspeed = 0, window; |
ac7e50a3 | 8658 | sector_t max_sectors,j, io_sectors, recovery_done; |
1da177e4 | 8659 | unsigned long mark[SYNC_MARKS]; |
54f89341 | 8660 | unsigned long update_time; |
1da177e4 LT |
8661 | sector_t mark_cnt[SYNC_MARKS]; |
8662 | int last_mark,m; | |
8663 | struct list_head *tmp; | |
8664 | sector_t last_check; | |
57afd89f | 8665 | int skipped = 0; |
3cb03002 | 8666 | struct md_rdev *rdev; |
c4a39551 | 8667 | char *desc, *action = NULL; |
7c2c57c9 | 8668 | struct blk_plug plug; |
41a9a0dc | 8669 | int ret; |
1da177e4 LT |
8670 | |
8671 | /* just incase thread restarts... */ | |
d5d885fd SL |
8672 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
8673 | test_bit(MD_RECOVERY_WAIT, &mddev->recovery)) | |
1da177e4 | 8674 | return; |
3991b31e N |
8675 | if (mddev->ro) {/* never try to sync a read-only array */ |
8676 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
5fd6c1dc | 8677 | return; |
3991b31e | 8678 | } |
1da177e4 | 8679 | |
41a9a0dc GJ |
8680 | if (mddev_is_clustered(mddev)) { |
8681 | ret = md_cluster_ops->resync_start(mddev); | |
8682 | if (ret) | |
8683 | goto skip; | |
8684 | ||
bb8bf15b | 8685 | set_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags); |
41a9a0dc GJ |
8686 | if (!(test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8687 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) || | |
8688 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) | |
8689 | && ((unsigned long long)mddev->curr_resync_completed | |
8690 | < (unsigned long long)mddev->resync_max_sectors)) | |
8691 | goto skip; | |
8692 | } | |
8693 | ||
61df9d91 | 8694 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
c4a39551 | 8695 | if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) { |
61df9d91 | 8696 | desc = "data-check"; |
c4a39551 JB |
8697 | action = "check"; |
8698 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
61df9d91 | 8699 | desc = "requested-resync"; |
c4a39551 JB |
8700 | action = "repair"; |
8701 | } else | |
61df9d91 N |
8702 | desc = "resync"; |
8703 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
8704 | desc = "reshape"; | |
8705 | else | |
8706 | desc = "recovery"; | |
8707 | ||
c4a39551 JB |
8708 | mddev->last_sync_action = action ?: desc; |
8709 | ||
1da177e4 LT |
8710 | /* we overload curr_resync somewhat here. |
8711 | * 0 == not engaged in resync at all | |
8712 | * 2 == checking that there is no conflict with another sync | |
8713 | * 1 == like 2, but have yielded to allow conflicting resync to | |
e5b521ee | 8714 | * commence |
1da177e4 LT |
8715 | * other == active in resync - this many blocks |
8716 | * | |
8717 | * Before starting a resync we must have set curr_resync to | |
8718 | * 2, and then checked that every "conflicting" array has curr_resync | |
8719 | * less than ours. When we find one that is the same or higher | |
8720 | * we wait on resync_wait. To avoid deadlock, we reduce curr_resync | |
8721 | * to 1 if we choose to yield (based arbitrarily on address of mddev structure). | |
8722 | * This will mean we have to start checking from the beginning again. | |
8723 | * | |
8724 | */ | |
8725 | ||
8726 | do { | |
c622ca54 | 8727 | int mddev2_minor = -1; |
1da177e4 LT |
8728 | mddev->curr_resync = 2; |
8729 | ||
8730 | try_again: | |
404e4b43 | 8731 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
1da177e4 | 8732 | goto skip; |
29ac4aa3 | 8733 | for_each_mddev(mddev2, tmp) { |
1da177e4 LT |
8734 | if (mddev2 == mddev) |
8735 | continue; | |
90b08710 BS |
8736 | if (!mddev->parallel_resync |
8737 | && mddev2->curr_resync | |
8738 | && match_mddev_units(mddev, mddev2)) { | |
1da177e4 LT |
8739 | DEFINE_WAIT(wq); |
8740 | if (mddev < mddev2 && mddev->curr_resync == 2) { | |
8741 | /* arbitrarily yield */ | |
8742 | mddev->curr_resync = 1; | |
8743 | wake_up(&resync_wait); | |
8744 | } | |
8745 | if (mddev > mddev2 && mddev->curr_resync == 1) | |
8746 | /* no need to wait here, we can wait the next | |
8747 | * time 'round when curr_resync == 2 | |
8748 | */ | |
8749 | continue; | |
9744197c N |
8750 | /* We need to wait 'interruptible' so as not to |
8751 | * contribute to the load average, and not to | |
8752 | * be caught by 'softlockup' | |
8753 | */ | |
8754 | prepare_to_wait(&resync_wait, &wq, TASK_INTERRUPTIBLE); | |
c91abf5a | 8755 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
8712e553 | 8756 | mddev2->curr_resync >= mddev->curr_resync) { |
c622ca54 AP |
8757 | if (mddev2_minor != mddev2->md_minor) { |
8758 | mddev2_minor = mddev2->md_minor; | |
9d48739e N |
8759 | pr_info("md: delaying %s of %s until %s has finished (they share one or more physical units)\n", |
8760 | desc, mdname(mddev), | |
8761 | mdname(mddev2)); | |
c622ca54 | 8762 | } |
1da177e4 | 8763 | mddev_put(mddev2); |
9744197c N |
8764 | if (signal_pending(current)) |
8765 | flush_signals(current); | |
1da177e4 LT |
8766 | schedule(); |
8767 | finish_wait(&resync_wait, &wq); | |
8768 | goto try_again; | |
8769 | } | |
8770 | finish_wait(&resync_wait, &wq); | |
8771 | } | |
8772 | } | |
8773 | } while (mddev->curr_resync < 2); | |
8774 | ||
5fd6c1dc | 8775 | j = 0; |
9d88883e | 8776 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
1da177e4 | 8777 | /* resync follows the size requested by the personality, |
57afd89f | 8778 | * which defaults to physical size, but can be virtual size |
1da177e4 LT |
8779 | */ |
8780 | max_sectors = mddev->resync_max_sectors; | |
7f7583d4 | 8781 | atomic64_set(&mddev->resync_mismatches, 0); |
5fd6c1dc | 8782 | /* we don't use the checkpoint if there's a bitmap */ |
5e96ee65 NB |
8783 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) |
8784 | j = mddev->resync_min; | |
8785 | else if (!mddev->bitmap) | |
5fd6c1dc | 8786 | j = mddev->recovery_cp; |
5e96ee65 | 8787 | |
cb9ee154 | 8788 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) { |
c804cdec | 8789 | max_sectors = mddev->resync_max_sectors; |
cb9ee154 GJ |
8790 | /* |
8791 | * If the original node aborts reshaping then we continue the | |
8792 | * reshaping, so set j again to avoid restart reshape from the | |
8793 | * first beginning | |
8794 | */ | |
8795 | if (mddev_is_clustered(mddev) && | |
8796 | mddev->reshape_position != MaxSector) | |
8797 | j = mddev->reshape_position; | |
8798 | } else { | |
1da177e4 | 8799 | /* recovery follows the physical size of devices */ |
58c0fed4 | 8800 | max_sectors = mddev->dev_sectors; |
5fd6c1dc | 8801 | j = MaxSector; |
4e59ca7d | 8802 | rcu_read_lock(); |
dafb20fa | 8803 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 8804 | if (rdev->raid_disk >= 0 && |
f2076e7d | 8805 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
8806 | !test_bit(Faulty, &rdev->flags) && |
8807 | !test_bit(In_sync, &rdev->flags) && | |
8808 | rdev->recovery_offset < j) | |
8809 | j = rdev->recovery_offset; | |
4e59ca7d | 8810 | rcu_read_unlock(); |
133d4527 N |
8811 | |
8812 | /* If there is a bitmap, we need to make sure all | |
8813 | * writes that started before we added a spare | |
8814 | * complete before we start doing a recovery. | |
8815 | * Otherwise the write might complete and (via | |
8816 | * bitmap_endwrite) set a bit in the bitmap after the | |
8817 | * recovery has checked that bit and skipped that | |
8818 | * region. | |
8819 | */ | |
8820 | if (mddev->bitmap) { | |
8821 | mddev->pers->quiesce(mddev, 1); | |
8822 | mddev->pers->quiesce(mddev, 0); | |
8823 | } | |
5fd6c1dc | 8824 | } |
1da177e4 | 8825 | |
9d48739e N |
8826 | pr_info("md: %s of RAID array %s\n", desc, mdname(mddev)); |
8827 | pr_debug("md: minimum _guaranteed_ speed: %d KB/sec/disk.\n", speed_min(mddev)); | |
8828 | pr_debug("md: using maximum available idle IO bandwidth (but not more than %d KB/sec) for %s.\n", | |
8829 | speed_max(mddev), desc); | |
1da177e4 | 8830 | |
eea1bf38 | 8831 | is_mddev_idle(mddev, 1); /* this initializes IO event counters */ |
5fd6c1dc | 8832 | |
57afd89f | 8833 | io_sectors = 0; |
1da177e4 LT |
8834 | for (m = 0; m < SYNC_MARKS; m++) { |
8835 | mark[m] = jiffies; | |
57afd89f | 8836 | mark_cnt[m] = io_sectors; |
1da177e4 LT |
8837 | } |
8838 | last_mark = 0; | |
8839 | mddev->resync_mark = mark[last_mark]; | |
8840 | mddev->resync_mark_cnt = mark_cnt[last_mark]; | |
8841 | ||
8842 | /* | |
8843 | * Tune reconstruction: | |
8844 | */ | |
e5b521ee | 8845 | window = 32 * (PAGE_SIZE / 512); |
9d48739e N |
8846 | pr_debug("md: using %dk window, over a total of %lluk.\n", |
8847 | window/2, (unsigned long long)max_sectors/2); | |
1da177e4 LT |
8848 | |
8849 | atomic_set(&mddev->recovery_active, 0); | |
1da177e4 LT |
8850 | last_check = 0; |
8851 | ||
8852 | if (j>2) { | |
9d48739e N |
8853 | pr_debug("md: resuming %s of %s from checkpoint.\n", |
8854 | desc, mdname(mddev)); | |
1da177e4 | 8855 | mddev->curr_resync = j; |
72f36d59 N |
8856 | } else |
8857 | mddev->curr_resync = 3; /* no longer delayed */ | |
75d3da43 | 8858 | mddev->curr_resync_completed = j; |
e1a86dbb | 8859 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
72f36d59 | 8860 | md_new_event(mddev); |
54f89341 | 8861 | update_time = jiffies; |
1da177e4 | 8862 | |
7c2c57c9 | 8863 | blk_start_plug(&plug); |
1da177e4 | 8864 | while (j < max_sectors) { |
57afd89f | 8865 | sector_t sectors; |
1da177e4 | 8866 | |
57afd89f | 8867 | skipped = 0; |
97e4f42d | 8868 | |
7a91ee1f N |
8869 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8870 | ((mddev->curr_resync > mddev->curr_resync_completed && | |
8871 | (mddev->curr_resync - mddev->curr_resync_completed) | |
8872 | > (max_sectors >> 4)) || | |
54f89341 | 8873 | time_after_eq(jiffies, update_time + UPDATE_FREQUENCY) || |
7a91ee1f | 8874 | (j - mddev->curr_resync_completed)*2 |
c5e19d90 N |
8875 | >= mddev->resync_max - mddev->curr_resync_completed || |
8876 | mddev->curr_resync_completed > mddev->resync_max | |
7a91ee1f | 8877 | )) { |
97e4f42d | 8878 | /* time to update curr_resync_completed */ |
97e4f42d N |
8879 | wait_event(mddev->recovery_wait, |
8880 | atomic_read(&mddev->recovery_active) == 0); | |
75d3da43 | 8881 | mddev->curr_resync_completed = j; |
35d78c66 | 8882 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && |
8883 | j > mddev->recovery_cp) | |
8884 | mddev->recovery_cp = j; | |
54f89341 | 8885 | update_time = jiffies; |
2953079c | 8886 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
e1a86dbb | 8887 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
97e4f42d | 8888 | } |
acb180b0 | 8889 | |
c91abf5a N |
8890 | while (j >= mddev->resync_max && |
8891 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
e62e58a5 N |
8892 | /* As this condition is controlled by user-space, |
8893 | * we can block indefinitely, so use '_interruptible' | |
8894 | * to avoid triggering warnings. | |
8895 | */ | |
8896 | flush_signals(current); /* just in case */ | |
8897 | wait_event_interruptible(mddev->recovery_wait, | |
8898 | mddev->resync_max > j | |
c91abf5a N |
8899 | || test_bit(MD_RECOVERY_INTR, |
8900 | &mddev->recovery)); | |
e62e58a5 | 8901 | } |
acb180b0 | 8902 | |
c91abf5a N |
8903 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8904 | break; | |
acb180b0 | 8905 | |
09314799 | 8906 | sectors = mddev->pers->sync_request(mddev, j, &skipped); |
57afd89f | 8907 | if (sectors == 0) { |
dfc70645 | 8908 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
c91abf5a | 8909 | break; |
1da177e4 | 8910 | } |
57afd89f N |
8911 | |
8912 | if (!skipped) { /* actual IO requested */ | |
8913 | io_sectors += sectors; | |
8914 | atomic_add(sectors, &mddev->recovery_active); | |
8915 | } | |
8916 | ||
e875ecea N |
8917 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8918 | break; | |
8919 | ||
1da177e4 | 8920 | j += sectors; |
5ed1df2e N |
8921 | if (j > max_sectors) |
8922 | /* when skipping, extra large numbers can be returned. */ | |
8923 | j = max_sectors; | |
72f36d59 N |
8924 | if (j > 2) |
8925 | mddev->curr_resync = j; | |
ff4e8d9a | 8926 | mddev->curr_mark_cnt = io_sectors; |
d7603b7e | 8927 | if (last_check == 0) |
e875ecea | 8928 | /* this is the earliest that rebuild will be |
d7603b7e N |
8929 | * visible in /proc/mdstat |
8930 | */ | |
8931 | md_new_event(mddev); | |
57afd89f N |
8932 | |
8933 | if (last_check + window > io_sectors || j == max_sectors) | |
1da177e4 LT |
8934 | continue; |
8935 | ||
57afd89f | 8936 | last_check = io_sectors; |
1da177e4 LT |
8937 | repeat: |
8938 | if (time_after_eq(jiffies, mark[last_mark] + SYNC_MARK_STEP )) { | |
8939 | /* step marks */ | |
8940 | int next = (last_mark+1) % SYNC_MARKS; | |
8941 | ||
8942 | mddev->resync_mark = mark[next]; | |
8943 | mddev->resync_mark_cnt = mark_cnt[next]; | |
8944 | mark[next] = jiffies; | |
57afd89f | 8945 | mark_cnt[next] = io_sectors - atomic_read(&mddev->recovery_active); |
1da177e4 LT |
8946 | last_mark = next; |
8947 | } | |
8948 | ||
c91abf5a N |
8949 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8950 | break; | |
1da177e4 LT |
8951 | |
8952 | /* | |
8953 | * this loop exits only if either when we are slower than | |
8954 | * the 'hard' speed limit, or the system was IO-idle for | |
8955 | * a jiffy. | |
8956 | * the system might be non-idle CPU-wise, but we only care | |
8957 | * about not overloading the IO subsystem. (things like an | |
8958 | * e2fsck being done on the RAID array should execute fast) | |
8959 | */ | |
1da177e4 LT |
8960 | cond_resched(); |
8961 | ||
ac7e50a3 XN |
8962 | recovery_done = io_sectors - atomic_read(&mddev->recovery_active); |
8963 | currspeed = ((unsigned long)(recovery_done - mddev->resync_mark_cnt))/2 | |
57afd89f | 8964 | /((jiffies-mddev->resync_mark)/HZ +1) +1; |
1da177e4 | 8965 | |
88202a0c | 8966 | if (currspeed > speed_min(mddev)) { |
ac8fa419 | 8967 | if (currspeed > speed_max(mddev)) { |
c0e48521 | 8968 | msleep(500); |
1da177e4 LT |
8969 | goto repeat; |
8970 | } | |
ac8fa419 N |
8971 | if (!is_mddev_idle(mddev, 0)) { |
8972 | /* | |
8973 | * Give other IO more of a chance. | |
8974 | * The faster the devices, the less we wait. | |
8975 | */ | |
8976 | wait_event(mddev->recovery_wait, | |
8977 | !atomic_read(&mddev->recovery_active)); | |
8978 | } | |
1da177e4 LT |
8979 | } |
8980 | } | |
9d48739e N |
8981 | pr_info("md: %s: %s %s.\n",mdname(mddev), desc, |
8982 | test_bit(MD_RECOVERY_INTR, &mddev->recovery) | |
8983 | ? "interrupted" : "done"); | |
1da177e4 LT |
8984 | /* |
8985 | * this also signals 'finished resyncing' to md_stop | |
8986 | */ | |
7c2c57c9 | 8987 | blk_finish_plug(&plug); |
1da177e4 LT |
8988 | wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active)); |
8989 | ||
5ed1df2e N |
8990 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8991 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
1217e1d1 | 8992 | mddev->curr_resync > 3) { |
5ed1df2e | 8993 | mddev->curr_resync_completed = mddev->curr_resync; |
e1a86dbb | 8994 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
5ed1df2e | 8995 | } |
09314799 | 8996 | mddev->pers->sync_request(mddev, max_sectors, &skipped); |
1da177e4 | 8997 | |
dfc70645 | 8998 | if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) && |
1217e1d1 | 8999 | mddev->curr_resync > 3) { |
5fd6c1dc N |
9000 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
9001 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
9002 | if (mddev->curr_resync >= mddev->recovery_cp) { | |
9d48739e N |
9003 | pr_debug("md: checkpointing %s of %s.\n", |
9004 | desc, mdname(mddev)); | |
0a19caab | 9005 | if (test_bit(MD_RECOVERY_ERROR, |
9006 | &mddev->recovery)) | |
9007 | mddev->recovery_cp = | |
9008 | mddev->curr_resync_completed; | |
9009 | else | |
9010 | mddev->recovery_cp = | |
9011 | mddev->curr_resync; | |
5fd6c1dc N |
9012 | } |
9013 | } else | |
9014 | mddev->recovery_cp = MaxSector; | |
9015 | } else { | |
9016 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) | |
9017 | mddev->curr_resync = MaxSector; | |
db0505d3 N |
9018 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9019 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) { | |
9020 | rcu_read_lock(); | |
9021 | rdev_for_each_rcu(rdev, mddev) | |
9022 | if (rdev->raid_disk >= 0 && | |
9023 | mddev->delta_disks >= 0 && | |
9024 | !test_bit(Journal, &rdev->flags) && | |
9025 | !test_bit(Faulty, &rdev->flags) && | |
9026 | !test_bit(In_sync, &rdev->flags) && | |
9027 | rdev->recovery_offset < mddev->curr_resync) | |
9028 | rdev->recovery_offset = mddev->curr_resync; | |
9029 | rcu_read_unlock(); | |
9030 | } | |
5fd6c1dc | 9031 | } |
1da177e4 | 9032 | } |
db91ff55 | 9033 | skip: |
bb8bf15b GJ |
9034 | /* set CHANGE_PENDING here since maybe another update is needed, |
9035 | * so other nodes are informed. It should be harmless for normal | |
9036 | * raid */ | |
2953079c SL |
9037 | set_mask_bits(&mddev->sb_flags, 0, |
9038 | BIT(MD_SB_CHANGE_PENDING) | BIT(MD_SB_CHANGE_DEVS)); | |
c186b128 | 9039 | |
8876391e BC |
9040 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9041 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
9042 | mddev->delta_disks > 0 && | |
9043 | mddev->pers->finish_reshape && | |
9044 | mddev->pers->size && | |
9045 | mddev->queue) { | |
9046 | mddev_lock_nointr(mddev); | |
9047 | md_set_array_sectors(mddev, mddev->pers->size(mddev, 0, 0)); | |
9048 | mddev_unlock(mddev); | |
2c247c51 CH |
9049 | if (!mddev_is_clustered(mddev)) |
9050 | set_capacity_and_notify(mddev->gendisk, | |
9051 | mddev->array_sectors); | |
8876391e BC |
9052 | } |
9053 | ||
23da422b | 9054 | spin_lock(&mddev->lock); |
c07b70ad N |
9055 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { |
9056 | /* We completed so min/max setting can be forgotten if used. */ | |
9057 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
9058 | mddev->resync_min = 0; | |
9059 | mddev->resync_max = MaxSector; | |
9060 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
9061 | mddev->resync_min = mddev->curr_resync_completed; | |
f7851be7 | 9062 | set_bit(MD_RECOVERY_DONE, &mddev->recovery); |
1da177e4 | 9063 | mddev->curr_resync = 0; |
23da422b N |
9064 | spin_unlock(&mddev->lock); |
9065 | ||
1da177e4 | 9066 | wake_up(&resync_wait); |
1da177e4 | 9067 | md_wakeup_thread(mddev->thread); |
c6207277 | 9068 | return; |
1da177e4 | 9069 | } |
29269553 | 9070 | EXPORT_SYMBOL_GPL(md_do_sync); |
1da177e4 | 9071 | |
746d3207 N |
9072 | static int remove_and_add_spares(struct mddev *mddev, |
9073 | struct md_rdev *this) | |
b4c4c7b8 | 9074 | { |
3cb03002 | 9075 | struct md_rdev *rdev; |
b4c4c7b8 | 9076 | int spares = 0; |
f2a371c5 | 9077 | int removed = 0; |
d787be40 | 9078 | bool remove_some = false; |
b4c4c7b8 | 9079 | |
39772f0a N |
9080 | if (this && test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
9081 | /* Mustn't remove devices when resync thread is running */ | |
9082 | return 0; | |
9083 | ||
d787be40 N |
9084 | rdev_for_each(rdev, mddev) { |
9085 | if ((this == NULL || rdev == this) && | |
9086 | rdev->raid_disk >= 0 && | |
9087 | !test_bit(Blocked, &rdev->flags) && | |
9088 | test_bit(Faulty, &rdev->flags) && | |
9089 | atomic_read(&rdev->nr_pending)==0) { | |
9090 | /* Faulty non-Blocked devices with nr_pending == 0 | |
9091 | * never get nr_pending incremented, | |
9092 | * never get Faulty cleared, and never get Blocked set. | |
9093 | * So we can synchronize_rcu now rather than once per device | |
9094 | */ | |
9095 | remove_some = true; | |
9096 | set_bit(RemoveSynchronized, &rdev->flags); | |
9097 | } | |
9098 | } | |
9099 | ||
9100 | if (remove_some) | |
9101 | synchronize_rcu(); | |
9102 | rdev_for_each(rdev, mddev) { | |
746d3207 N |
9103 | if ((this == NULL || rdev == this) && |
9104 | rdev->raid_disk >= 0 && | |
6bfe0b49 | 9105 | !test_bit(Blocked, &rdev->flags) && |
d787be40 | 9106 | ((test_bit(RemoveSynchronized, &rdev->flags) || |
f2076e7d SL |
9107 | (!test_bit(In_sync, &rdev->flags) && |
9108 | !test_bit(Journal, &rdev->flags))) && | |
d787be40 | 9109 | atomic_read(&rdev->nr_pending)==0)) { |
b4c4c7b8 | 9110 | if (mddev->pers->hot_remove_disk( |
b8321b68 | 9111 | mddev, rdev) == 0) { |
36fad858 | 9112 | sysfs_unlink_rdev(mddev, rdev); |
011abdc9 | 9113 | rdev->saved_raid_disk = rdev->raid_disk; |
b4c4c7b8 | 9114 | rdev->raid_disk = -1; |
f2a371c5 | 9115 | removed++; |
b4c4c7b8 N |
9116 | } |
9117 | } | |
d787be40 N |
9118 | if (remove_some && test_bit(RemoveSynchronized, &rdev->flags)) |
9119 | clear_bit(RemoveSynchronized, &rdev->flags); | |
9120 | } | |
9121 | ||
90584fc9 | 9122 | if (removed && mddev->kobj.sd) |
e1a86dbb | 9123 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
b4c4c7b8 | 9124 | |
2910ff17 | 9125 | if (this && removed) |
746d3207 N |
9126 | goto no_add; |
9127 | ||
dafb20fa | 9128 | rdev_for_each(rdev, mddev) { |
2910ff17 GR |
9129 | if (this && this != rdev) |
9130 | continue; | |
dbb64f86 GR |
9131 | if (test_bit(Candidate, &rdev->flags)) |
9132 | continue; | |
7bfec5f3 N |
9133 | if (rdev->raid_disk >= 0 && |
9134 | !test_bit(In_sync, &rdev->flags) && | |
f2076e7d | 9135 | !test_bit(Journal, &rdev->flags) && |
7bfec5f3 N |
9136 | !test_bit(Faulty, &rdev->flags)) |
9137 | spares++; | |
7ceb17e8 N |
9138 | if (rdev->raid_disk >= 0) |
9139 | continue; | |
9140 | if (test_bit(Faulty, &rdev->flags)) | |
9141 | continue; | |
f6b6ec5c SL |
9142 | if (!test_bit(Journal, &rdev->flags)) { |
9143 | if (mddev->ro && | |
9144 | ! (rdev->saved_raid_disk >= 0 && | |
9145 | !test_bit(Bitmap_sync, &rdev->flags))) | |
9146 | continue; | |
7ceb17e8 | 9147 | |
f6b6ec5c SL |
9148 | rdev->recovery_offset = 0; |
9149 | } | |
3f79cc22 | 9150 | if (mddev->pers->hot_add_disk(mddev, rdev) == 0) { |
5e3b8a8d DLM |
9151 | /* failure here is OK */ |
9152 | sysfs_link_rdev(mddev, rdev); | |
f6b6ec5c SL |
9153 | if (!test_bit(Journal, &rdev->flags)) |
9154 | spares++; | |
7ceb17e8 | 9155 | md_new_event(mddev); |
2953079c | 9156 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
dfc70645 | 9157 | } |
b4c4c7b8 | 9158 | } |
746d3207 | 9159 | no_add: |
6dafab6b | 9160 | if (removed) |
2953079c | 9161 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
b4c4c7b8 N |
9162 | return spares; |
9163 | } | |
7ebc0be7 | 9164 | |
ac05f256 N |
9165 | static void md_start_sync(struct work_struct *ws) |
9166 | { | |
9167 | struct mddev *mddev = container_of(ws, struct mddev, del_work); | |
c186b128 | 9168 | |
ac05f256 N |
9169 | mddev->sync_thread = md_register_thread(md_do_sync, |
9170 | mddev, | |
9171 | "resync"); | |
9172 | if (!mddev->sync_thread) { | |
9d48739e N |
9173 | pr_warn("%s: could not start resync thread...\n", |
9174 | mdname(mddev)); | |
ac05f256 N |
9175 | /* leave the spares where they are, it shouldn't hurt */ |
9176 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
9177 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9178 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9179 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
9180 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 9181 | wake_up(&resync_wait); |
ac05f256 N |
9182 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
9183 | &mddev->recovery)) | |
9184 | if (mddev->sysfs_action) | |
9185 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9186 | } else | |
9187 | md_wakeup_thread(mddev->sync_thread); | |
9188 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9189 | md_new_event(mddev); | |
9190 | } | |
9191 | ||
1da177e4 LT |
9192 | /* |
9193 | * This routine is regularly called by all per-raid-array threads to | |
9194 | * deal with generic issues like resync and super-block update. | |
9195 | * Raid personalities that don't have a thread (linear/raid0) do not | |
9196 | * need this as they never do any recovery or update the superblock. | |
9197 | * | |
9198 | * It does not do any resync itself, but rather "forks" off other threads | |
9199 | * to do that as needed. | |
9200 | * When it is determined that resync is needed, we set MD_RECOVERY_RUNNING in | |
9201 | * "->recovery" and create a thread at ->sync_thread. | |
dfc70645 | 9202 | * When the thread finishes it sets MD_RECOVERY_DONE |
1da177e4 LT |
9203 | * and wakeups up this thread which will reap the thread and finish up. |
9204 | * This thread also removes any faulty devices (with nr_pending == 0). | |
9205 | * | |
9206 | * The overall approach is: | |
9207 | * 1/ if the superblock needs updating, update it. | |
9208 | * 2/ If a recovery thread is running, don't do anything else. | |
9209 | * 3/ If recovery has finished, clean up, possibly marking spares active. | |
9210 | * 4/ If there are any faulty devices, remove them. | |
9211 | * 5/ If array is degraded, try to add spares devices | |
9212 | * 6/ If array has spares or is not in-sync, start a resync thread. | |
9213 | */ | |
fd01b88c | 9214 | void md_check_recovery(struct mddev *mddev) |
1da177e4 | 9215 | { |
059421e0 N |
9216 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags) && mddev->sb_flags) { |
9217 | /* Write superblock - thread that called mddev_suspend() | |
9218 | * holds reconfig_mutex for us. | |
9219 | */ | |
9220 | set_bit(MD_UPDATING_SB, &mddev->flags); | |
9221 | smp_mb__after_atomic(); | |
9222 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags)) | |
9223 | md_update_sb(mddev, 0); | |
9224 | clear_bit_unlock(MD_UPDATING_SB, &mddev->flags); | |
9225 | wake_up(&mddev->sb_wait); | |
9226 | } | |
9227 | ||
68866e42 JB |
9228 | if (mddev->suspended) |
9229 | return; | |
9230 | ||
5f40402d | 9231 | if (mddev->bitmap) |
e64e4018 | 9232 | md_bitmap_daemon_work(mddev); |
1da177e4 | 9233 | |
fca4d848 | 9234 | if (signal_pending(current)) { |
31a59e34 | 9235 | if (mddev->pers->sync_request && !mddev->external) { |
9d48739e N |
9236 | pr_debug("md: %s in immediate safe mode\n", |
9237 | mdname(mddev)); | |
fca4d848 N |
9238 | mddev->safemode = 2; |
9239 | } | |
9240 | flush_signals(current); | |
9241 | } | |
9242 | ||
c89a8eee N |
9243 | if (mddev->ro && !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) |
9244 | return; | |
1da177e4 | 9245 | if ( ! ( |
2953079c | 9246 | (mddev->sb_flags & ~ (1<<MD_SB_CHANGE_PENDING)) || |
1da177e4 | 9247 | test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
fca4d848 | 9248 | test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
31a59e34 | 9249 | (mddev->external == 0 && mddev->safemode == 1) || |
4ad23a97 | 9250 | (mddev->safemode == 2 |
fca4d848 | 9251 | && !mddev->in_sync && mddev->recovery_cp == MaxSector) |
1da177e4 LT |
9252 | )) |
9253 | return; | |
fca4d848 | 9254 | |
df5b89b3 | 9255 | if (mddev_trylock(mddev)) { |
b4c4c7b8 | 9256 | int spares = 0; |
480523fe | 9257 | bool try_set_sync = mddev->safemode != 0; |
fca4d848 | 9258 | |
afc1f55c | 9259 | if (!mddev->external && mddev->safemode == 1) |
33182d15 N |
9260 | mddev->safemode = 0; |
9261 | ||
c89a8eee | 9262 | if (mddev->ro) { |
ab16bfc7 NB |
9263 | struct md_rdev *rdev; |
9264 | if (!mddev->external && mddev->in_sync) | |
9265 | /* 'Blocked' flag not needed as failed devices | |
9266 | * will be recorded if array switched to read/write. | |
9267 | * Leaving it set will prevent the device | |
9268 | * from being removed. | |
9269 | */ | |
9270 | rdev_for_each(rdev, mddev) | |
9271 | clear_bit(Blocked, &rdev->flags); | |
7ceb17e8 N |
9272 | /* On a read-only array we can: |
9273 | * - remove failed devices | |
9274 | * - add already-in_sync devices if the array itself | |
9275 | * is in-sync. | |
9276 | * As we only add devices that are already in-sync, | |
9277 | * we can activate the spares immediately. | |
c89a8eee | 9278 | */ |
7ceb17e8 | 9279 | remove_and_add_spares(mddev, NULL); |
8313b8e5 N |
9280 | /* There is no thread, but we need to call |
9281 | * ->spare_active and clear saved_raid_disk | |
9282 | */ | |
2ac295a5 | 9283 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8313b8e5 | 9284 | md_reap_sync_thread(mddev); |
a4a3d26d | 9285 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
8313b8e5 | 9286 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
2953079c | 9287 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
c89a8eee N |
9288 | goto unlock; |
9289 | } | |
9290 | ||
659b254f | 9291 | if (mddev_is_clustered(mddev)) { |
f7c7a2f9 | 9292 | struct md_rdev *rdev, *tmp; |
659b254f GJ |
9293 | /* kick the device if another node issued a |
9294 | * remove disk. | |
9295 | */ | |
f7c7a2f9 | 9296 | rdev_for_each_safe(rdev, tmp, mddev) { |
659b254f GJ |
9297 | if (test_and_clear_bit(ClusterRemove, &rdev->flags) && |
9298 | rdev->raid_disk < 0) | |
9299 | md_kick_rdev_from_array(rdev); | |
9300 | } | |
9301 | } | |
9302 | ||
480523fe | 9303 | if (try_set_sync && !mddev->external && !mddev->in_sync) { |
85572d7c | 9304 | spin_lock(&mddev->lock); |
6497709b | 9305 | set_in_sync(mddev); |
85572d7c | 9306 | spin_unlock(&mddev->lock); |
fca4d848 | 9307 | } |
fca4d848 | 9308 | |
2953079c | 9309 | if (mddev->sb_flags) |
850b2b42 | 9310 | md_update_sb(mddev, 0); |
06d91a5f | 9311 | |
1da177e4 LT |
9312 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
9313 | !test_bit(MD_RECOVERY_DONE, &mddev->recovery)) { | |
9314 | /* resync/recovery still happening */ | |
9315 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9316 | goto unlock; | |
9317 | } | |
9318 | if (mddev->sync_thread) { | |
a91d5ac0 | 9319 | md_reap_sync_thread(mddev); |
1da177e4 LT |
9320 | goto unlock; |
9321 | } | |
72a23c21 NB |
9322 | /* Set RUNNING before clearing NEEDED to avoid |
9323 | * any transients in the value of "sync_action". | |
9324 | */ | |
72f36d59 | 9325 | mddev->curr_resync_completed = 0; |
23da422b | 9326 | spin_lock(&mddev->lock); |
72a23c21 | 9327 | set_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
23da422b | 9328 | spin_unlock(&mddev->lock); |
24dd469d N |
9329 | /* Clear some bits that don't mean anything, but |
9330 | * might be left set | |
9331 | */ | |
24dd469d N |
9332 | clear_bit(MD_RECOVERY_INTR, &mddev->recovery); |
9333 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); | |
1da177e4 | 9334 | |
ed209584 N |
9335 | if (!test_and_clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
9336 | test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) | |
ac05f256 | 9337 | goto not_running; |
1da177e4 LT |
9338 | /* no recovery is running. |
9339 | * remove any failed drives, then | |
9340 | * add spares if possible. | |
72f36d59 | 9341 | * Spares are also removed and re-added, to allow |
1da177e4 LT |
9342 | * the personality to fail the re-add. |
9343 | */ | |
1da177e4 | 9344 | |
b4c4c7b8 | 9345 | if (mddev->reshape_position != MaxSector) { |
50ac168a N |
9346 | if (mddev->pers->check_reshape == NULL || |
9347 | mddev->pers->check_reshape(mddev) != 0) | |
b4c4c7b8 | 9348 | /* Cannot proceed */ |
ac05f256 | 9349 | goto not_running; |
b4c4c7b8 | 9350 | set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); |
72a23c21 | 9351 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
746d3207 | 9352 | } else if ((spares = remove_and_add_spares(mddev, NULL))) { |
24dd469d N |
9353 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9354 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
56ac36d7 | 9355 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
72a23c21 | 9356 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9357 | } else if (mddev->recovery_cp < MaxSector) { |
9358 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
72a23c21 | 9359 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9360 | } else if (!test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) |
9361 | /* nothing to be done ... */ | |
ac05f256 | 9362 | goto not_running; |
24dd469d | 9363 | |
1da177e4 | 9364 | if (mddev->pers->sync_request) { |
ef99bf48 | 9365 | if (spares) { |
a654b9d8 N |
9366 | /* We are adding a device or devices to an array |
9367 | * which has the bitmap stored on all devices. | |
9368 | * So make sure all bitmap pages get written | |
9369 | */ | |
e64e4018 | 9370 | md_bitmap_write_all(mddev->bitmap); |
a654b9d8 | 9371 | } |
ac05f256 N |
9372 | INIT_WORK(&mddev->del_work, md_start_sync); |
9373 | queue_work(md_misc_wq, &mddev->del_work); | |
9374 | goto unlock; | |
1da177e4 | 9375 | } |
ac05f256 | 9376 | not_running: |
72a23c21 NB |
9377 | if (!mddev->sync_thread) { |
9378 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 9379 | wake_up(&resync_wait); |
72a23c21 NB |
9380 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
9381 | &mddev->recovery)) | |
0c3573f1 | 9382 | if (mddev->sysfs_action) |
00bcb4ac | 9383 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
72a23c21 | 9384 | } |
ac05f256 N |
9385 | unlock: |
9386 | wake_up(&mddev->sb_wait); | |
1da177e4 LT |
9387 | mddev_unlock(mddev); |
9388 | } | |
9389 | } | |
6c144d31 | 9390 | EXPORT_SYMBOL(md_check_recovery); |
1da177e4 | 9391 | |
a91d5ac0 JB |
9392 | void md_reap_sync_thread(struct mddev *mddev) |
9393 | { | |
9394 | struct md_rdev *rdev; | |
aefb2e5f GJ |
9395 | sector_t old_dev_sectors = mddev->dev_sectors; |
9396 | bool is_reshaped = false; | |
a91d5ac0 JB |
9397 | |
9398 | /* resync has finished, collect result */ | |
9399 | md_unregister_thread(&mddev->sync_thread); | |
9400 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
0d8ed0e9 GJ |
9401 | !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery) && |
9402 | mddev->degraded != mddev->raid_disks) { | |
a91d5ac0 JB |
9403 | /* success...*/ |
9404 | /* activate any spares */ | |
9405 | if (mddev->pers->spare_active(mddev)) { | |
e1a86dbb | 9406 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
2953079c | 9407 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a91d5ac0 JB |
9408 | } |
9409 | } | |
9410 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
aefb2e5f | 9411 | mddev->pers->finish_reshape) { |
a91d5ac0 | 9412 | mddev->pers->finish_reshape(mddev); |
aefb2e5f GJ |
9413 | if (mddev_is_clustered(mddev)) |
9414 | is_reshaped = true; | |
9415 | } | |
a91d5ac0 JB |
9416 | |
9417 | /* If array is no-longer degraded, then any saved_raid_disk | |
f466722c | 9418 | * information must be scrapped. |
a91d5ac0 | 9419 | */ |
f466722c N |
9420 | if (!mddev->degraded) |
9421 | rdev_for_each(rdev, mddev) | |
a91d5ac0 JB |
9422 | rdev->saved_raid_disk = -1; |
9423 | ||
9424 | md_update_sb(mddev, 1); | |
2953079c | 9425 | /* MD_SB_CHANGE_PENDING should be cleared by md_update_sb, so we can |
bb8bf15b GJ |
9426 | * call resync_finish here if MD_CLUSTER_RESYNC_LOCKED is set by |
9427 | * clustered raid */ | |
9428 | if (test_and_clear_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags)) | |
9429 | md_cluster_ops->resync_finish(mddev); | |
a91d5ac0 | 9430 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
ea358cd0 | 9431 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); |
a91d5ac0 JB |
9432 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9433 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9434 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9435 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
aefb2e5f GJ |
9436 | /* |
9437 | * We call md_cluster_ops->update_size here because sync_size could | |
9438 | * be changed by md_update_sb, and MD_RECOVERY_RESHAPE is cleared, | |
9439 | * so it is time to update size across cluster. | |
9440 | */ | |
9441 | if (mddev_is_clustered(mddev) && is_reshaped | |
9442 | && !test_bit(MD_CLOSING, &mddev->flags)) | |
9443 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
f851b60d | 9444 | wake_up(&resync_wait); |
a91d5ac0 JB |
9445 | /* flag recovery needed just to double check */ |
9446 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9447 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9448 | md_new_event(mddev); | |
9449 | if (mddev->event_work.func) | |
9450 | queue_work(md_misc_wq, &mddev->event_work); | |
9451 | } | |
6c144d31 | 9452 | EXPORT_SYMBOL(md_reap_sync_thread); |
a91d5ac0 | 9453 | |
fd01b88c | 9454 | void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev) |
6bfe0b49 | 9455 | { |
00bcb4ac | 9456 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
6bfe0b49 | 9457 | wait_event_timeout(rdev->blocked_wait, |
de393cde N |
9458 | !test_bit(Blocked, &rdev->flags) && |
9459 | !test_bit(BlockedBadBlocks, &rdev->flags), | |
6bfe0b49 DW |
9460 | msecs_to_jiffies(5000)); |
9461 | rdev_dec_pending(rdev, mddev); | |
9462 | } | |
9463 | EXPORT_SYMBOL(md_wait_for_blocked_rdev); | |
9464 | ||
c6563a8c N |
9465 | void md_finish_reshape(struct mddev *mddev) |
9466 | { | |
9467 | /* called be personality module when reshape completes. */ | |
9468 | struct md_rdev *rdev; | |
9469 | ||
9470 | rdev_for_each(rdev, mddev) { | |
9471 | if (rdev->data_offset > rdev->new_data_offset) | |
9472 | rdev->sectors += rdev->data_offset - rdev->new_data_offset; | |
9473 | else | |
9474 | rdev->sectors -= rdev->new_data_offset - rdev->data_offset; | |
9475 | rdev->data_offset = rdev->new_data_offset; | |
9476 | } | |
9477 | } | |
9478 | EXPORT_SYMBOL(md_finish_reshape); | |
2230dfe4 | 9479 | |
fc974ee2 | 9480 | /* Bad block management */ |
2230dfe4 | 9481 | |
fc974ee2 | 9482 | /* Returns 1 on success, 0 on failure */ |
3cb03002 | 9483 | int rdev_set_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
c6563a8c | 9484 | int is_new) |
2230dfe4 | 9485 | { |
85ad1d13 | 9486 | struct mddev *mddev = rdev->mddev; |
c6563a8c N |
9487 | int rv; |
9488 | if (is_new) | |
9489 | s += rdev->new_data_offset; | |
9490 | else | |
9491 | s += rdev->data_offset; | |
fc974ee2 VV |
9492 | rv = badblocks_set(&rdev->badblocks, s, sectors, 0); |
9493 | if (rv == 0) { | |
2230dfe4 | 9494 | /* Make sure they get written out promptly */ |
35b785f7 | 9495 | if (test_bit(ExternalBbl, &rdev->flags)) |
e1a86dbb | 9496 | sysfs_notify_dirent_safe(rdev->sysfs_unack_badblocks); |
8bd2f0a0 | 9497 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
2953079c SL |
9498 | set_mask_bits(&mddev->sb_flags, 0, |
9499 | BIT(MD_SB_CHANGE_CLEAN) | BIT(MD_SB_CHANGE_PENDING)); | |
2230dfe4 | 9500 | md_wakeup_thread(rdev->mddev->thread); |
fc974ee2 VV |
9501 | return 1; |
9502 | } else | |
9503 | return 0; | |
2230dfe4 N |
9504 | } |
9505 | EXPORT_SYMBOL_GPL(rdev_set_badblocks); | |
9506 | ||
c6563a8c N |
9507 | int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
9508 | int is_new) | |
2230dfe4 | 9509 | { |
35b785f7 | 9510 | int rv; |
c6563a8c N |
9511 | if (is_new) |
9512 | s += rdev->new_data_offset; | |
9513 | else | |
9514 | s += rdev->data_offset; | |
35b785f7 TM |
9515 | rv = badblocks_clear(&rdev->badblocks, s, sectors); |
9516 | if ((rv == 0) && test_bit(ExternalBbl, &rdev->flags)) | |
e1a86dbb | 9517 | sysfs_notify_dirent_safe(rdev->sysfs_badblocks); |
35b785f7 | 9518 | return rv; |
2230dfe4 N |
9519 | } |
9520 | EXPORT_SYMBOL_GPL(rdev_clear_badblocks); | |
9521 | ||
75c96f85 AB |
9522 | static int md_notify_reboot(struct notifier_block *this, |
9523 | unsigned long code, void *x) | |
1da177e4 LT |
9524 | { |
9525 | struct list_head *tmp; | |
fd01b88c | 9526 | struct mddev *mddev; |
2dba6a91 | 9527 | int need_delay = 0; |
1da177e4 | 9528 | |
c744a65c N |
9529 | for_each_mddev(mddev, tmp) { |
9530 | if (mddev_trylock(mddev)) { | |
30b8aa91 N |
9531 | if (mddev->pers) |
9532 | __md_stop_writes(mddev); | |
0f62fb22 N |
9533 | if (mddev->persistent) |
9534 | mddev->safemode = 2; | |
c744a65c | 9535 | mddev_unlock(mddev); |
2dba6a91 | 9536 | } |
c744a65c | 9537 | need_delay = 1; |
1da177e4 | 9538 | } |
c744a65c N |
9539 | /* |
9540 | * certain more exotic SCSI devices are known to be | |
9541 | * volatile wrt too early system reboots. While the | |
9542 | * right place to handle this issue is the given | |
9543 | * driver, we do want to have a safe RAID driver ... | |
9544 | */ | |
9545 | if (need_delay) | |
9546 | mdelay(1000*1); | |
9547 | ||
1da177e4 LT |
9548 | return NOTIFY_DONE; |
9549 | } | |
9550 | ||
75c96f85 | 9551 | static struct notifier_block md_notifier = { |
1da177e4 LT |
9552 | .notifier_call = md_notify_reboot, |
9553 | .next = NULL, | |
9554 | .priority = INT_MAX, /* before any real devices */ | |
9555 | }; | |
9556 | ||
9557 | static void md_geninit(void) | |
9558 | { | |
36a4e1fe | 9559 | pr_debug("md: sizeof(mdp_super_t) = %d\n", (int)sizeof(mdp_super_t)); |
1da177e4 | 9560 | |
97a32539 | 9561 | proc_create("mdstat", S_IRUGO, NULL, &mdstat_proc_ops); |
1da177e4 LT |
9562 | } |
9563 | ||
75c96f85 | 9564 | static int __init md_init(void) |
1da177e4 | 9565 | { |
e804ac78 TH |
9566 | int ret = -ENOMEM; |
9567 | ||
ada609ee | 9568 | md_wq = alloc_workqueue("md", WQ_MEM_RECLAIM, 0); |
e804ac78 TH |
9569 | if (!md_wq) |
9570 | goto err_wq; | |
9571 | ||
9572 | md_misc_wq = alloc_workqueue("md_misc", 0, 0); | |
9573 | if (!md_misc_wq) | |
9574 | goto err_misc_wq; | |
9575 | ||
cc1ffe61 | 9576 | md_rdev_misc_wq = alloc_workqueue("md_rdev_misc", 0, 0); |
cf0b9b48 | 9577 | if (!md_rdev_misc_wq) |
cc1ffe61 GJ |
9578 | goto err_rdev_misc_wq; |
9579 | ||
28144f99 CH |
9580 | ret = __register_blkdev(MD_MAJOR, "md", md_probe); |
9581 | if (ret < 0) | |
e804ac78 TH |
9582 | goto err_md; |
9583 | ||
28144f99 CH |
9584 | ret = __register_blkdev(0, "mdp", md_probe); |
9585 | if (ret < 0) | |
e804ac78 TH |
9586 | goto err_mdp; |
9587 | mdp_major = ret; | |
9588 | ||
1da177e4 | 9589 | register_reboot_notifier(&md_notifier); |
0b4d4147 | 9590 | raid_table_header = register_sysctl_table(raid_root_table); |
1da177e4 LT |
9591 | |
9592 | md_geninit(); | |
d710e138 | 9593 | return 0; |
1da177e4 | 9594 | |
e804ac78 TH |
9595 | err_mdp: |
9596 | unregister_blkdev(MD_MAJOR, "md"); | |
9597 | err_md: | |
cc1ffe61 GJ |
9598 | destroy_workqueue(md_rdev_misc_wq); |
9599 | err_rdev_misc_wq: | |
e804ac78 TH |
9600 | destroy_workqueue(md_misc_wq); |
9601 | err_misc_wq: | |
9602 | destroy_workqueue(md_wq); | |
9603 | err_wq: | |
9604 | return ret; | |
9605 | } | |
1da177e4 | 9606 | |
70bcecdb | 9607 | static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev) |
1d7e3e96 | 9608 | { |
70bcecdb | 9609 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
f7c7a2f9 | 9610 | struct md_rdev *rdev2, *tmp; |
70bcecdb GR |
9611 | int role, ret; |
9612 | char b[BDEVNAME_SIZE]; | |
1d7e3e96 | 9613 | |
818da59f GJ |
9614 | /* |
9615 | * If size is changed in another node then we need to | |
9616 | * do resize as well. | |
9617 | */ | |
9618 | if (mddev->dev_sectors != le64_to_cpu(sb->size)) { | |
9619 | ret = mddev->pers->resize(mddev, le64_to_cpu(sb->size)); | |
9620 | if (ret) | |
9621 | pr_info("md-cluster: resize failed\n"); | |
9622 | else | |
e64e4018 | 9623 | md_bitmap_update_sb(mddev->bitmap); |
818da59f GJ |
9624 | } |
9625 | ||
70bcecdb | 9626 | /* Check for change of roles in the active devices */ |
f7c7a2f9 | 9627 | rdev_for_each_safe(rdev2, tmp, mddev) { |
70bcecdb GR |
9628 | if (test_bit(Faulty, &rdev2->flags)) |
9629 | continue; | |
9630 | ||
9631 | /* Check if the roles changed */ | |
9632 | role = le16_to_cpu(sb->dev_roles[rdev2->desc_nr]); | |
dbb64f86 GR |
9633 | |
9634 | if (test_bit(Candidate, &rdev2->flags)) { | |
9635 | if (role == 0xfffe) { | |
9636 | pr_info("md: Removing Candidate device %s because add failed\n", bdevname(rdev2->bdev,b)); | |
9637 | md_kick_rdev_from_array(rdev2); | |
9638 | continue; | |
9639 | } | |
9640 | else | |
9641 | clear_bit(Candidate, &rdev2->flags); | |
9642 | } | |
9643 | ||
70bcecdb | 9644 | if (role != rdev2->raid_disk) { |
ca1e98e0 GJ |
9645 | /* |
9646 | * got activated except reshape is happening. | |
9647 | */ | |
9648 | if (rdev2->raid_disk == -1 && role != 0xffff && | |
9649 | !(le32_to_cpu(sb->feature_map) & | |
9650 | MD_FEATURE_RESHAPE_ACTIVE)) { | |
70bcecdb GR |
9651 | rdev2->saved_raid_disk = role; |
9652 | ret = remove_and_add_spares(mddev, rdev2); | |
9653 | pr_info("Activated spare: %s\n", | |
9d48739e | 9654 | bdevname(rdev2->bdev,b)); |
a578183e GJ |
9655 | /* wakeup mddev->thread here, so array could |
9656 | * perform resync with the new activated disk */ | |
9657 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9658 | md_wakeup_thread(mddev->thread); | |
70bcecdb GR |
9659 | } |
9660 | /* device faulty | |
9661 | * We just want to do the minimum to mark the disk | |
9662 | * as faulty. The recovery is performed by the | |
9663 | * one who initiated the error. | |
9664 | */ | |
9665 | if ((role == 0xfffe) || (role == 0xfffd)) { | |
9666 | md_error(mddev, rdev2); | |
9667 | clear_bit(Blocked, &rdev2->flags); | |
9668 | } | |
9669 | } | |
1d7e3e96 | 9670 | } |
70bcecdb | 9671 | |
a8da01f7 ZH |
9672 | if (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) { |
9673 | ret = update_raid_disks(mddev, le32_to_cpu(sb->raid_disks)); | |
9674 | if (ret) | |
9675 | pr_warn("md: updating array disks failed. %d\n", ret); | |
9676 | } | |
70bcecdb | 9677 | |
7564beda GJ |
9678 | /* |
9679 | * Since mddev->delta_disks has already updated in update_raid_disks, | |
9680 | * so it is time to check reshape. | |
9681 | */ | |
9682 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9683 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9684 | /* | |
9685 | * reshape is happening in the remote node, we need to | |
9686 | * update reshape_position and call start_reshape. | |
9687 | */ | |
ed4d0a4e | 9688 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); |
7564beda GJ |
9689 | if (mddev->pers->update_reshape_pos) |
9690 | mddev->pers->update_reshape_pos(mddev); | |
9691 | if (mddev->pers->start_reshape) | |
9692 | mddev->pers->start_reshape(mddev); | |
9693 | } else if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9694 | mddev->reshape_position != MaxSector && | |
9695 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9696 | /* reshape is just done in another node. */ | |
9697 | mddev->reshape_position = MaxSector; | |
9698 | if (mddev->pers->update_reshape_pos) | |
9699 | mddev->pers->update_reshape_pos(mddev); | |
9700 | } | |
9701 | ||
70bcecdb GR |
9702 | /* Finally set the event to be up to date */ |
9703 | mddev->events = le64_to_cpu(sb->events); | |
9704 | } | |
9705 | ||
9706 | static int read_rdev(struct mddev *mddev, struct md_rdev *rdev) | |
9707 | { | |
9708 | int err; | |
9709 | struct page *swapout = rdev->sb_page; | |
9710 | struct mdp_superblock_1 *sb; | |
9711 | ||
9712 | /* Store the sb page of the rdev in the swapout temporary | |
9713 | * variable in case we err in the future | |
9714 | */ | |
9715 | rdev->sb_page = NULL; | |
7f0f0d87 N |
9716 | err = alloc_disk_sb(rdev); |
9717 | if (err == 0) { | |
9718 | ClearPageUptodate(rdev->sb_page); | |
9719 | rdev->sb_loaded = 0; | |
9720 | err = super_types[mddev->major_version]. | |
9721 | load_super(rdev, NULL, mddev->minor_version); | |
9722 | } | |
70bcecdb GR |
9723 | if (err < 0) { |
9724 | pr_warn("%s: %d Could not reload rdev(%d) err: %d. Restoring old values\n", | |
9725 | __func__, __LINE__, rdev->desc_nr, err); | |
7f0f0d87 N |
9726 | if (rdev->sb_page) |
9727 | put_page(rdev->sb_page); | |
70bcecdb GR |
9728 | rdev->sb_page = swapout; |
9729 | rdev->sb_loaded = 1; | |
9730 | return err; | |
1d7e3e96 GR |
9731 | } |
9732 | ||
70bcecdb GR |
9733 | sb = page_address(rdev->sb_page); |
9734 | /* Read the offset unconditionally, even if MD_FEATURE_RECOVERY_OFFSET | |
9735 | * is not set | |
9736 | */ | |
9737 | ||
9738 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)) | |
9739 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); | |
9740 | ||
9741 | /* The other node finished recovery, call spare_active to set | |
9742 | * device In_sync and mddev->degraded | |
9743 | */ | |
9744 | if (rdev->recovery_offset == MaxSector && | |
9745 | !test_bit(In_sync, &rdev->flags) && | |
9746 | mddev->pers->spare_active(mddev)) | |
e1a86dbb | 9747 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
70bcecdb GR |
9748 | |
9749 | put_page(swapout); | |
9750 | return 0; | |
9751 | } | |
9752 | ||
9753 | void md_reload_sb(struct mddev *mddev, int nr) | |
9754 | { | |
9755 | struct md_rdev *rdev; | |
9756 | int err; | |
9757 | ||
9758 | /* Find the rdev */ | |
9759 | rdev_for_each_rcu(rdev, mddev) { | |
9760 | if (rdev->desc_nr == nr) | |
9761 | break; | |
9762 | } | |
9763 | ||
9764 | if (!rdev || rdev->desc_nr != nr) { | |
9765 | pr_warn("%s: %d Could not find rdev with nr %d\n", __func__, __LINE__, nr); | |
9766 | return; | |
9767 | } | |
9768 | ||
9769 | err = read_rdev(mddev, rdev); | |
9770 | if (err < 0) | |
9771 | return; | |
9772 | ||
9773 | check_sb_changes(mddev, rdev); | |
9774 | ||
9775 | /* Read all rdev's to update recovery_offset */ | |
0ea9924a GJ |
9776 | rdev_for_each_rcu(rdev, mddev) { |
9777 | if (!test_bit(Faulty, &rdev->flags)) | |
9778 | read_rdev(mddev, rdev); | |
9779 | } | |
1d7e3e96 GR |
9780 | } |
9781 | EXPORT_SYMBOL(md_reload_sb); | |
9782 | ||
1da177e4 LT |
9783 | #ifndef MODULE |
9784 | ||
9785 | /* | |
9786 | * Searches all registered partitions for autorun RAID arrays | |
9787 | * at boot time. | |
9788 | */ | |
4d936ec1 | 9789 | |
5b1f5bc3 | 9790 | static DEFINE_MUTEX(detected_devices_mutex); |
4d936ec1 ME |
9791 | static LIST_HEAD(all_detected_devices); |
9792 | struct detected_devices_node { | |
9793 | struct list_head list; | |
9794 | dev_t dev; | |
9795 | }; | |
1da177e4 LT |
9796 | |
9797 | void md_autodetect_dev(dev_t dev) | |
9798 | { | |
4d936ec1 ME |
9799 | struct detected_devices_node *node_detected_dev; |
9800 | ||
9801 | node_detected_dev = kzalloc(sizeof(*node_detected_dev), GFP_KERNEL); | |
9802 | if (node_detected_dev) { | |
9803 | node_detected_dev->dev = dev; | |
5b1f5bc3 | 9804 | mutex_lock(&detected_devices_mutex); |
4d936ec1 | 9805 | list_add_tail(&node_detected_dev->list, &all_detected_devices); |
5b1f5bc3 | 9806 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9807 | } |
1da177e4 LT |
9808 | } |
9809 | ||
d82fa81c | 9810 | void md_autostart_arrays(int part) |
1da177e4 | 9811 | { |
3cb03002 | 9812 | struct md_rdev *rdev; |
4d936ec1 ME |
9813 | struct detected_devices_node *node_detected_dev; |
9814 | dev_t dev; | |
9815 | int i_scanned, i_passed; | |
1da177e4 | 9816 | |
4d936ec1 ME |
9817 | i_scanned = 0; |
9818 | i_passed = 0; | |
1da177e4 | 9819 | |
9d48739e | 9820 | pr_info("md: Autodetecting RAID arrays.\n"); |
1da177e4 | 9821 | |
5b1f5bc3 | 9822 | mutex_lock(&detected_devices_mutex); |
4d936ec1 ME |
9823 | while (!list_empty(&all_detected_devices) && i_scanned < INT_MAX) { |
9824 | i_scanned++; | |
9825 | node_detected_dev = list_entry(all_detected_devices.next, | |
9826 | struct detected_devices_node, list); | |
9827 | list_del(&node_detected_dev->list); | |
9828 | dev = node_detected_dev->dev; | |
9829 | kfree(node_detected_dev); | |
90bcf133 | 9830 | mutex_unlock(&detected_devices_mutex); |
df968c4e | 9831 | rdev = md_import_device(dev,0, 90); |
90bcf133 | 9832 | mutex_lock(&detected_devices_mutex); |
1da177e4 LT |
9833 | if (IS_ERR(rdev)) |
9834 | continue; | |
9835 | ||
403df478 | 9836 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 9837 | continue; |
403df478 | 9838 | |
d0fae18f | 9839 | set_bit(AutoDetected, &rdev->flags); |
1da177e4 | 9840 | list_add(&rdev->same_set, &pending_raid_disks); |
4d936ec1 | 9841 | i_passed++; |
1da177e4 | 9842 | } |
5b1f5bc3 | 9843 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9844 | |
9d48739e | 9845 | pr_debug("md: Scanned %d and added %d devices.\n", i_scanned, i_passed); |
1da177e4 LT |
9846 | |
9847 | autorun_devices(part); | |
9848 | } | |
9849 | ||
fdee8ae4 | 9850 | #endif /* !MODULE */ |
1da177e4 LT |
9851 | |
9852 | static __exit void md_exit(void) | |
9853 | { | |
fd01b88c | 9854 | struct mddev *mddev; |
1da177e4 | 9855 | struct list_head *tmp; |
e2f23b60 | 9856 | int delay = 1; |
8ab5e4c1 | 9857 | |
3dbd8c2e | 9858 | unregister_blkdev(MD_MAJOR,"md"); |
1da177e4 LT |
9859 | unregister_blkdev(mdp_major, "mdp"); |
9860 | unregister_reboot_notifier(&md_notifier); | |
9861 | unregister_sysctl_table(raid_table_header); | |
e2f23b60 N |
9862 | |
9863 | /* We cannot unload the modules while some process is | |
9864 | * waiting for us in select() or poll() - wake them up | |
9865 | */ | |
9866 | md_unloading = 1; | |
9867 | while (waitqueue_active(&md_event_waiters)) { | |
9868 | /* not safe to leave yet */ | |
9869 | wake_up(&md_event_waiters); | |
9870 | msleep(delay); | |
9871 | delay += delay; | |
9872 | } | |
1da177e4 | 9873 | remove_proc_entry("mdstat", NULL); |
e2f23b60 | 9874 | |
29ac4aa3 | 9875 | for_each_mddev(mddev, tmp) { |
1da177e4 | 9876 | export_array(mddev); |
9356863c | 9877 | mddev->ctime = 0; |
d3374825 | 9878 | mddev->hold_active = 0; |
9356863c N |
9879 | /* |
9880 | * for_each_mddev() will call mddev_put() at the end of each | |
9881 | * iteration. As the mddev is now fully clear, this will | |
9882 | * schedule the mddev for destruction by a workqueue, and the | |
9883 | * destroy_workqueue() below will wait for that to complete. | |
9884 | */ | |
1da177e4 | 9885 | } |
cc1ffe61 | 9886 | destroy_workqueue(md_rdev_misc_wq); |
e804ac78 TH |
9887 | destroy_workqueue(md_misc_wq); |
9888 | destroy_workqueue(md_wq); | |
1da177e4 LT |
9889 | } |
9890 | ||
685784aa | 9891 | subsys_initcall(md_init); |
1da177e4 LT |
9892 | module_exit(md_exit) |
9893 | ||
e4dca7b7 | 9894 | static int get_ro(char *buffer, const struct kernel_param *kp) |
f91de92e | 9895 | { |
3f99980c | 9896 | return sprintf(buffer, "%d\n", start_readonly); |
f91de92e | 9897 | } |
e4dca7b7 | 9898 | static int set_ro(const char *val, const struct kernel_param *kp) |
f91de92e | 9899 | { |
4c9309c0 | 9900 | return kstrtouint(val, 10, (unsigned int *)&start_readonly); |
f91de92e N |
9901 | } |
9902 | ||
80ca3a44 N |
9903 | module_param_call(start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR); |
9904 | module_param(start_dirty_degraded, int, S_IRUGO|S_IWUSR); | |
efeb53c0 | 9905 | module_param_call(new_array, add_named_array, NULL, NULL, S_IWUSR); |
78b6350d | 9906 | module_param(create_on_open, bool, S_IRUSR|S_IWUSR); |
f91de92e | 9907 | |
1da177e4 | 9908 | MODULE_LICENSE("GPL"); |
0efb9e61 | 9909 | MODULE_DESCRIPTION("MD RAID framework"); |
aa1595e9 | 9910 | MODULE_ALIAS("md"); |
72008652 | 9911 | MODULE_ALIAS_BLOCKDEV_MAJOR(MD_MAJOR); |