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af1a8899 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | md.c : Multiple Devices driver for Linux | |
f72ffdd6 | 4 | Copyright (C) 1998, 1999, 2000 Ingo Molnar |
1da177e4 LT |
5 | |
6 | completely rewritten, based on the MD driver code from Marc Zyngier | |
7 | ||
8 | Changes: | |
9 | ||
10 | - RAID-1/RAID-5 extensions by Miguel de Icaza, Gadi Oxman, Ingo Molnar | |
11 | - RAID-6 extensions by H. Peter Anvin <hpa@zytor.com> | |
12 | - boot support for linear and striped mode by Harald Hoyer <HarryH@Royal.Net> | |
13 | - kerneld support by Boris Tobotras <boris@xtalk.msk.su> | |
14 | - kmod support by: Cyrus Durgin | |
15 | - RAID0 bugfixes: Mark Anthony Lisher <markal@iname.com> | |
16 | - Devfs support by Richard Gooch <rgooch@atnf.csiro.au> | |
17 | ||
18 | - lots of fixes and improvements to the RAID1/RAID5 and generic | |
19 | RAID code (such as request based resynchronization): | |
20 | ||
21 | Neil Brown <neilb@cse.unsw.edu.au>. | |
22 | ||
32a7627c N |
23 | - persistent bitmap code |
24 | Copyright (C) 2003-2004, Paul Clements, SteelEye Technology, Inc. | |
25 | ||
9d48739e N |
26 | |
27 | Errors, Warnings, etc. | |
28 | Please use: | |
29 | pr_crit() for error conditions that risk data loss | |
30 | pr_err() for error conditions that are unexpected, like an IO error | |
31 | or internal inconsistency | |
32 | pr_warn() for error conditions that could have been predicated, like | |
33 | adding a device to an array when it has incompatible metadata | |
34 | pr_info() for every interesting, very rare events, like an array starting | |
35 | or stopping, or resync starting or stopping | |
36 | pr_debug() for everything else. | |
37 | ||
1da177e4 LT |
38 | */ |
39 | ||
963c555e | 40 | #include <linux/sched/mm.h> |
3f07c014 | 41 | #include <linux/sched/signal.h> |
a6fb0934 | 42 | #include <linux/kthread.h> |
bff61975 | 43 | #include <linux/blkdev.h> |
fc974ee2 | 44 | #include <linux/badblocks.h> |
1da177e4 | 45 | #include <linux/sysctl.h> |
bff61975 | 46 | #include <linux/seq_file.h> |
ff01bb48 | 47 | #include <linux/fs.h> |
d7603b7e | 48 | #include <linux/poll.h> |
16f17b39 | 49 | #include <linux/ctype.h> |
e7d2860b | 50 | #include <linux/string.h> |
fb4d8c76 N |
51 | #include <linux/hdreg.h> |
52 | #include <linux/proc_fs.h> | |
53 | #include <linux/random.h> | |
a9f215d7 | 54 | #include <linux/major.h> |
056075c7 | 55 | #include <linux/module.h> |
fb4d8c76 | 56 | #include <linux/reboot.h> |
32a7627c | 57 | #include <linux/file.h> |
aa98aa31 | 58 | #include <linux/compat.h> |
25570727 | 59 | #include <linux/delay.h> |
bff61975 N |
60 | #include <linux/raid/md_p.h> |
61 | #include <linux/raid/md_u.h> | |
74cc979c | 62 | #include <linux/raid/detect.h> |
5a0e3ad6 | 63 | #include <linux/slab.h> |
4ad23a97 | 64 | #include <linux/percpu-refcount.h> |
c6a564ff | 65 | #include <linux/part_stat.h> |
4ad23a97 | 66 | |
504634f6 | 67 | #include <trace/events/block.h> |
43b2e5d8 | 68 | #include "md.h" |
935fe098 | 69 | #include "md-bitmap.h" |
edb39c9d | 70 | #include "md-cluster.h" |
1da177e4 | 71 | |
01f96c0a N |
72 | /* pers_list is a list of registered personalities protected |
73 | * by pers_lock. | |
74 | * pers_lock does extra service to protect accesses to | |
75 | * mddev->thread when the mutex cannot be held. | |
76 | */ | |
2604b703 | 77 | static LIST_HEAD(pers_list); |
1da177e4 LT |
78 | static DEFINE_SPINLOCK(pers_lock); |
79 | ||
28dec870 KO |
80 | static struct kobj_type md_ktype; |
81 | ||
edb39c9d | 82 | struct md_cluster_operations *md_cluster_ops; |
589a1c49 | 83 | EXPORT_SYMBOL(md_cluster_ops); |
2b598ee5 | 84 | static struct module *md_cluster_mod; |
edb39c9d | 85 | |
90b08710 | 86 | static DECLARE_WAIT_QUEUE_HEAD(resync_wait); |
e804ac78 TH |
87 | static struct workqueue_struct *md_wq; |
88 | static struct workqueue_struct *md_misc_wq; | |
cc1ffe61 | 89 | static struct workqueue_struct *md_rdev_misc_wq; |
90b08710 | 90 | |
746d3207 N |
91 | static int remove_and_add_spares(struct mddev *mddev, |
92 | struct md_rdev *this); | |
5aa61f42 | 93 | static void mddev_detach(struct mddev *mddev); |
746d3207 | 94 | |
1e50915f RB |
95 | /* |
96 | * Default number of read corrections we'll attempt on an rdev | |
97 | * before ejecting it from the array. We divide the read error | |
98 | * count by 2 for every hour elapsed between read errors. | |
99 | */ | |
100 | #define MD_DEFAULT_MAX_CORRECTED_READ_ERRORS 20 | |
7c9d5c54 ZH |
101 | /* Default safemode delay: 200 msec */ |
102 | #define DEFAULT_SAFEMODE_DELAY ((200 * HZ)/1000 +1) | |
1da177e4 LT |
103 | /* |
104 | * Current RAID-1,4,5 parallel reconstruction 'guaranteed speed limit' | |
105 | * is 1000 KB/sec, so the extra system load does not show up that much. | |
106 | * Increase it if you want to have more _guaranteed_ speed. Note that | |
338cec32 | 107 | * the RAID driver will use the maximum available bandwidth if the IO |
1da177e4 LT |
108 | * subsystem is idle. There is also an 'absolute maximum' reconstruction |
109 | * speed limit - in case reconstruction slows down your system despite | |
110 | * idle IO detection. | |
111 | * | |
112 | * you can change it via /proc/sys/dev/raid/speed_limit_min and _max. | |
88202a0c | 113 | * or /sys/block/mdX/md/sync_speed_{min,max} |
1da177e4 LT |
114 | */ |
115 | ||
116 | static int sysctl_speed_limit_min = 1000; | |
117 | static int sysctl_speed_limit_max = 200000; | |
fd01b88c | 118 | static inline int speed_min(struct mddev *mddev) |
88202a0c N |
119 | { |
120 | return mddev->sync_speed_min ? | |
121 | mddev->sync_speed_min : sysctl_speed_limit_min; | |
122 | } | |
123 | ||
fd01b88c | 124 | static inline int speed_max(struct mddev *mddev) |
88202a0c N |
125 | { |
126 | return mddev->sync_speed_max ? | |
127 | mddev->sync_speed_max : sysctl_speed_limit_max; | |
128 | } | |
1da177e4 | 129 | |
69b00b5b GJ |
130 | static void rdev_uninit_serial(struct md_rdev *rdev) |
131 | { | |
132 | if (!test_and_clear_bit(CollisionCheck, &rdev->flags)) | |
133 | return; | |
134 | ||
025471f9 | 135 | kvfree(rdev->serial); |
69b00b5b GJ |
136 | rdev->serial = NULL; |
137 | } | |
138 | ||
139 | static void rdevs_uninit_serial(struct mddev *mddev) | |
140 | { | |
141 | struct md_rdev *rdev; | |
142 | ||
143 | rdev_for_each(rdev, mddev) | |
144 | rdev_uninit_serial(rdev); | |
145 | } | |
146 | ||
404659cf | 147 | static int rdev_init_serial(struct md_rdev *rdev) |
3e148a32 | 148 | { |
025471f9 GJ |
149 | /* serial_nums equals with BARRIER_BUCKETS_NR */ |
150 | int i, serial_nums = 1 << ((PAGE_SHIFT - ilog2(sizeof(atomic_t)))); | |
69b00b5b GJ |
151 | struct serial_in_rdev *serial = NULL; |
152 | ||
153 | if (test_bit(CollisionCheck, &rdev->flags)) | |
154 | return 0; | |
155 | ||
025471f9 GJ |
156 | serial = kvmalloc(sizeof(struct serial_in_rdev) * serial_nums, |
157 | GFP_KERNEL); | |
69b00b5b GJ |
158 | if (!serial) |
159 | return -ENOMEM; | |
160 | ||
025471f9 GJ |
161 | for (i = 0; i < serial_nums; i++) { |
162 | struct serial_in_rdev *serial_tmp = &serial[i]; | |
163 | ||
164 | spin_lock_init(&serial_tmp->serial_lock); | |
165 | serial_tmp->serial_rb = RB_ROOT_CACHED; | |
166 | init_waitqueue_head(&serial_tmp->serial_io_wait); | |
167 | } | |
168 | ||
69b00b5b | 169 | rdev->serial = serial; |
404659cf | 170 | set_bit(CollisionCheck, &rdev->flags); |
3e148a32 | 171 | |
69b00b5b | 172 | return 0; |
3e148a32 GJ |
173 | } |
174 | ||
69b00b5b | 175 | static int rdevs_init_serial(struct mddev *mddev) |
11d3a9f6 GJ |
176 | { |
177 | struct md_rdev *rdev; | |
69b00b5b | 178 | int ret = 0; |
11d3a9f6 GJ |
179 | |
180 | rdev_for_each(rdev, mddev) { | |
69b00b5b GJ |
181 | ret = rdev_init_serial(rdev); |
182 | if (ret) | |
183 | break; | |
11d3a9f6 | 184 | } |
69b00b5b GJ |
185 | |
186 | /* Free all resources if pool is not existed */ | |
187 | if (ret && !mddev->serial_info_pool) | |
188 | rdevs_uninit_serial(mddev); | |
189 | ||
190 | return ret; | |
11d3a9f6 GJ |
191 | } |
192 | ||
963c555e | 193 | /* |
de31ee94 GJ |
194 | * rdev needs to enable serial stuffs if it meets the conditions: |
195 | * 1. it is multi-queue device flaged with writemostly. | |
196 | * 2. the write-behind mode is enabled. | |
197 | */ | |
198 | static int rdev_need_serial(struct md_rdev *rdev) | |
199 | { | |
200 | return (rdev && rdev->mddev->bitmap_info.max_write_behind > 0 && | |
e556f6ba | 201 | rdev->bdev->bd_disk->queue->nr_hw_queues != 1 && |
de31ee94 GJ |
202 | test_bit(WriteMostly, &rdev->flags)); |
203 | } | |
204 | ||
205 | /* | |
206 | * Init resource for rdev(s), then create serial_info_pool if: | |
207 | * 1. rdev is the first device which return true from rdev_enable_serial. | |
208 | * 2. rdev is NULL, means we want to enable serialization for all rdevs. | |
963c555e | 209 | */ |
404659cf | 210 | void mddev_create_serial_pool(struct mddev *mddev, struct md_rdev *rdev, |
11d3a9f6 | 211 | bool is_suspend) |
963c555e | 212 | { |
69b00b5b GJ |
213 | int ret = 0; |
214 | ||
de31ee94 GJ |
215 | if (rdev && !rdev_need_serial(rdev) && |
216 | !test_bit(CollisionCheck, &rdev->flags)) | |
963c555e GJ |
217 | return; |
218 | ||
de31ee94 GJ |
219 | if (!is_suspend) |
220 | mddev_suspend(mddev); | |
221 | ||
222 | if (!rdev) | |
69b00b5b | 223 | ret = rdevs_init_serial(mddev); |
de31ee94 | 224 | else |
69b00b5b GJ |
225 | ret = rdev_init_serial(rdev); |
226 | if (ret) | |
227 | goto abort; | |
de31ee94 | 228 | |
404659cf | 229 | if (mddev->serial_info_pool == NULL) { |
3024ba2d CL |
230 | /* |
231 | * already in memalloc noio context by | |
232 | * mddev_suspend() | |
233 | */ | |
404659cf GJ |
234 | mddev->serial_info_pool = |
235 | mempool_create_kmalloc_pool(NR_SERIAL_INFOS, | |
236 | sizeof(struct serial_info)); | |
69b00b5b GJ |
237 | if (!mddev->serial_info_pool) { |
238 | rdevs_uninit_serial(mddev); | |
404659cf | 239 | pr_err("can't alloc memory pool for serialization\n"); |
69b00b5b | 240 | } |
963c555e | 241 | } |
69b00b5b GJ |
242 | |
243 | abort: | |
de31ee94 GJ |
244 | if (!is_suspend) |
245 | mddev_resume(mddev); | |
963c555e | 246 | } |
963c555e GJ |
247 | |
248 | /* | |
de31ee94 GJ |
249 | * Free resource from rdev(s), and destroy serial_info_pool under conditions: |
250 | * 1. rdev is the last device flaged with CollisionCheck. | |
251 | * 2. when bitmap is destroyed while policy is not enabled. | |
252 | * 3. for disable policy, the pool is destroyed only when no rdev needs it. | |
963c555e | 253 | */ |
69b00b5b GJ |
254 | void mddev_destroy_serial_pool(struct mddev *mddev, struct md_rdev *rdev, |
255 | bool is_suspend) | |
963c555e | 256 | { |
11d3a9f6 | 257 | if (rdev && !test_bit(CollisionCheck, &rdev->flags)) |
963c555e GJ |
258 | return; |
259 | ||
404659cf | 260 | if (mddev->serial_info_pool) { |
963c555e | 261 | struct md_rdev *temp; |
de31ee94 | 262 | int num = 0; /* used to track if other rdevs need the pool */ |
963c555e | 263 | |
11d3a9f6 GJ |
264 | if (!is_suspend) |
265 | mddev_suspend(mddev); | |
266 | rdev_for_each(temp, mddev) { | |
267 | if (!rdev) { | |
69b00b5b GJ |
268 | if (!mddev->serialize_policy || |
269 | !rdev_need_serial(temp)) | |
270 | rdev_uninit_serial(temp); | |
de31ee94 GJ |
271 | else |
272 | num++; | |
273 | } else if (temp != rdev && | |
274 | test_bit(CollisionCheck, &temp->flags)) | |
963c555e | 275 | num++; |
11d3a9f6 GJ |
276 | } |
277 | ||
278 | if (rdev) | |
69b00b5b | 279 | rdev_uninit_serial(rdev); |
de31ee94 GJ |
280 | |
281 | if (num) | |
282 | pr_info("The mempool could be used by other devices\n"); | |
283 | else { | |
404659cf GJ |
284 | mempool_destroy(mddev->serial_info_pool); |
285 | mddev->serial_info_pool = NULL; | |
963c555e | 286 | } |
11d3a9f6 GJ |
287 | if (!is_suspend) |
288 | mddev_resume(mddev); | |
963c555e GJ |
289 | } |
290 | } | |
291 | ||
1da177e4 LT |
292 | static struct ctl_table_header *raid_table_header; |
293 | ||
82592c38 | 294 | static struct ctl_table raid_table[] = { |
1da177e4 | 295 | { |
1da177e4 LT |
296 | .procname = "speed_limit_min", |
297 | .data = &sysctl_speed_limit_min, | |
298 | .maxlen = sizeof(int), | |
80ca3a44 | 299 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 300 | .proc_handler = proc_dointvec, |
1da177e4 LT |
301 | }, |
302 | { | |
1da177e4 LT |
303 | .procname = "speed_limit_max", |
304 | .data = &sysctl_speed_limit_max, | |
305 | .maxlen = sizeof(int), | |
80ca3a44 | 306 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 307 | .proc_handler = proc_dointvec, |
1da177e4 | 308 | }, |
894d2491 | 309 | { } |
1da177e4 LT |
310 | }; |
311 | ||
82592c38 | 312 | static struct ctl_table raid_dir_table[] = { |
1da177e4 | 313 | { |
1da177e4 LT |
314 | .procname = "raid", |
315 | .maxlen = 0, | |
80ca3a44 | 316 | .mode = S_IRUGO|S_IXUGO, |
1da177e4 LT |
317 | .child = raid_table, |
318 | }, | |
894d2491 | 319 | { } |
1da177e4 LT |
320 | }; |
321 | ||
82592c38 | 322 | static struct ctl_table raid_root_table[] = { |
1da177e4 | 323 | { |
1da177e4 LT |
324 | .procname = "dev", |
325 | .maxlen = 0, | |
326 | .mode = 0555, | |
327 | .child = raid_dir_table, | |
328 | }, | |
894d2491 | 329 | { } |
1da177e4 LT |
330 | }; |
331 | ||
f91de92e N |
332 | static int start_readonly; |
333 | ||
78b6350d N |
334 | /* |
335 | * The original mechanism for creating an md device is to create | |
336 | * a device node in /dev and to open it. This causes races with device-close. | |
337 | * The preferred method is to write to the "new_array" module parameter. | |
338 | * This can avoid races. | |
339 | * Setting create_on_open to false disables the original mechanism | |
340 | * so all the races disappear. | |
341 | */ | |
342 | static bool create_on_open = true; | |
343 | ||
d7603b7e N |
344 | /* |
345 | * We have a system wide 'event count' that is incremented | |
346 | * on any 'interesting' event, and readers of /proc/mdstat | |
347 | * can use 'poll' or 'select' to find out when the event | |
348 | * count increases. | |
349 | * | |
350 | * Events are: | |
351 | * start array, stop array, error, add device, remove device, | |
352 | * start build, activate spare | |
353 | */ | |
2989ddbd | 354 | static DECLARE_WAIT_QUEUE_HEAD(md_event_waiters); |
d7603b7e | 355 | static atomic_t md_event_count; |
fd01b88c | 356 | void md_new_event(struct mddev *mddev) |
d7603b7e N |
357 | { |
358 | atomic_inc(&md_event_count); | |
359 | wake_up(&md_event_waiters); | |
360 | } | |
29269553 | 361 | EXPORT_SYMBOL_GPL(md_new_event); |
d7603b7e | 362 | |
1da177e4 LT |
363 | /* |
364 | * Enables to iterate over all existing md arrays | |
365 | * all_mddevs_lock protects this list. | |
366 | */ | |
367 | static LIST_HEAD(all_mddevs); | |
368 | static DEFINE_SPINLOCK(all_mddevs_lock); | |
369 | ||
1da177e4 LT |
370 | /* |
371 | * iterates through all used mddevs in the system. | |
372 | * We take care to grab the all_mddevs_lock whenever navigating | |
373 | * the list, and to always hold a refcount when unlocked. | |
374 | * Any code which breaks out of this loop while own | |
375 | * a reference to the current mddev and must mddev_put it. | |
376 | */ | |
fd01b88c | 377 | #define for_each_mddev(_mddev,_tmp) \ |
1da177e4 | 378 | \ |
f72ffdd6 | 379 | for (({ spin_lock(&all_mddevs_lock); \ |
fd01b88c N |
380 | _tmp = all_mddevs.next; \ |
381 | _mddev = NULL;}); \ | |
382 | ({ if (_tmp != &all_mddevs) \ | |
383 | mddev_get(list_entry(_tmp, struct mddev, all_mddevs));\ | |
1da177e4 | 384 | spin_unlock(&all_mddevs_lock); \ |
fd01b88c N |
385 | if (_mddev) mddev_put(_mddev); \ |
386 | _mddev = list_entry(_tmp, struct mddev, all_mddevs); \ | |
387 | _tmp != &all_mddevs;}); \ | |
1da177e4 | 388 | ({ spin_lock(&all_mddevs_lock); \ |
fd01b88c | 389 | _tmp = _tmp->next;}) \ |
1da177e4 LT |
390 | ) |
391 | ||
409c57f3 N |
392 | /* Rather than calling directly into the personality make_request function, |
393 | * IO requests come here first so that we can check if the device is | |
394 | * being suspended pending a reconfiguration. | |
395 | * We hold a refcount over the call to ->make_request. By the time that | |
396 | * call has finished, the bio has been linked into some internal structure | |
397 | * and so is visible to ->quiesce(), so we don't need the refcount any more. | |
398 | */ | |
b3143b9a N |
399 | static bool is_suspended(struct mddev *mddev, struct bio *bio) |
400 | { | |
401 | if (mddev->suspended) | |
402 | return true; | |
403 | if (bio_data_dir(bio) != WRITE) | |
404 | return false; | |
405 | if (mddev->suspend_lo >= mddev->suspend_hi) | |
406 | return false; | |
407 | if (bio->bi_iter.bi_sector >= mddev->suspend_hi) | |
408 | return false; | |
409 | if (bio_end_sector(bio) < mddev->suspend_lo) | |
410 | return false; | |
411 | return true; | |
412 | } | |
413 | ||
393debc2 SL |
414 | void md_handle_request(struct mddev *mddev, struct bio *bio) |
415 | { | |
416 | check_suspended: | |
417 | rcu_read_lock(); | |
b3143b9a | 418 | if (is_suspended(mddev, bio)) { |
393debc2 SL |
419 | DEFINE_WAIT(__wait); |
420 | for (;;) { | |
421 | prepare_to_wait(&mddev->sb_wait, &__wait, | |
422 | TASK_UNINTERRUPTIBLE); | |
b3143b9a | 423 | if (!is_suspended(mddev, bio)) |
393debc2 SL |
424 | break; |
425 | rcu_read_unlock(); | |
426 | schedule(); | |
427 | rcu_read_lock(); | |
428 | } | |
429 | finish_wait(&mddev->sb_wait, &__wait); | |
430 | } | |
431 | atomic_inc(&mddev->active_io); | |
432 | rcu_read_unlock(); | |
433 | ||
434 | if (!mddev->pers->make_request(mddev, bio)) { | |
435 | atomic_dec(&mddev->active_io); | |
436 | wake_up(&mddev->sb_wait); | |
437 | goto check_suspended; | |
438 | } | |
439 | ||
440 | if (atomic_dec_and_test(&mddev->active_io) && mddev->suspended) | |
441 | wake_up(&mddev->sb_wait); | |
442 | } | |
443 | EXPORT_SYMBOL(md_handle_request); | |
444 | ||
c62b37d9 | 445 | static blk_qc_t md_submit_bio(struct bio *bio) |
1da177e4 | 446 | { |
49077326 | 447 | const int rw = bio_data_dir(bio); |
309dca30 | 448 | struct mddev *mddev = bio->bi_bdev->bd_disk->private_data; |
49077326 | 449 | |
9a5a8597 | 450 | if (mddev == NULL || mddev->pers == NULL) { |
62f7b198 GP |
451 | bio_io_error(bio); |
452 | return BLK_QC_T_NONE; | |
453 | } | |
454 | ||
9a5a8597 | 455 | if (unlikely(test_bit(MD_BROKEN, &mddev->flags)) && (rw == WRITE)) { |
409c57f3 | 456 | bio_io_error(bio); |
dece1635 | 457 | return BLK_QC_T_NONE; |
409c57f3 | 458 | } |
9a5a8597 CIK |
459 | |
460 | blk_queue_split(&bio); | |
461 | ||
bbfa57c0 | 462 | if (mddev->ro == 1 && unlikely(rw == WRITE)) { |
4246a0b6 | 463 | if (bio_sectors(bio) != 0) |
4e4cbee9 | 464 | bio->bi_status = BLK_STS_IOERR; |
4246a0b6 | 465 | bio_endio(bio); |
dece1635 | 466 | return BLK_QC_T_NONE; |
bbfa57c0 | 467 | } |
49077326 | 468 | |
9c573de3 | 469 | /* bio could be mergeable after passing to underlayer */ |
1eff9d32 | 470 | bio->bi_opf &= ~REQ_NOMERGE; |
393debc2 SL |
471 | |
472 | md_handle_request(mddev, bio); | |
49077326 | 473 | |
dece1635 | 474 | return BLK_QC_T_NONE; |
409c57f3 N |
475 | } |
476 | ||
9e35b99c N |
477 | /* mddev_suspend makes sure no new requests are submitted |
478 | * to the device, and that any requests that have been submitted | |
479 | * are completely handled. | |
afa0f557 N |
480 | * Once mddev_detach() is called and completes, the module will be |
481 | * completely unused. | |
9e35b99c | 482 | */ |
fd01b88c | 483 | void mddev_suspend(struct mddev *mddev) |
409c57f3 | 484 | { |
092398dc | 485 | WARN_ON_ONCE(mddev->thread && current == mddev->thread->tsk); |
4d5324f7 | 486 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
487 | if (mddev->suspended++) |
488 | return; | |
409c57f3 | 489 | synchronize_rcu(); |
cc27b0c7 | 490 | wake_up(&mddev->sb_wait); |
35bfc521 N |
491 | set_bit(MD_ALLOW_SB_UPDATE, &mddev->flags); |
492 | smp_mb__after_atomic(); | |
409c57f3 N |
493 | wait_event(mddev->sb_wait, atomic_read(&mddev->active_io) == 0); |
494 | mddev->pers->quiesce(mddev, 1); | |
35bfc521 N |
495 | clear_bit_unlock(MD_ALLOW_SB_UPDATE, &mddev->flags); |
496 | wait_event(mddev->sb_wait, !test_bit(MD_UPDATING_SB, &mddev->flags)); | |
0d9f4f13 JB |
497 | |
498 | del_timer_sync(&mddev->safemode_timer); | |
78f57ef9 CL |
499 | /* restrict memory reclaim I/O during raid array is suspend */ |
500 | mddev->noio_flag = memalloc_noio_save(); | |
409c57f3 | 501 | } |
390ee602 | 502 | EXPORT_SYMBOL_GPL(mddev_suspend); |
409c57f3 | 503 | |
fd01b88c | 504 | void mddev_resume(struct mddev *mddev) |
409c57f3 | 505 | { |
78f57ef9 CL |
506 | /* entred the memalloc scope from mddev_suspend() */ |
507 | memalloc_noio_restore(mddev->noio_flag); | |
4d5324f7 | 508 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
509 | if (--mddev->suspended) |
510 | return; | |
409c57f3 N |
511 | wake_up(&mddev->sb_wait); |
512 | mddev->pers->quiesce(mddev, 0); | |
0fd018af | 513 | |
47525e59 | 514 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
0fd018af JB |
515 | md_wakeup_thread(mddev->thread); |
516 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
1da177e4 | 517 | } |
390ee602 | 518 | EXPORT_SYMBOL_GPL(mddev_resume); |
1da177e4 | 519 | |
a2826aa9 | 520 | /* |
e9c7469b | 521 | * Generic flush handling for md |
a2826aa9 N |
522 | */ |
523 | ||
4bc034d3 | 524 | static void md_end_flush(struct bio *bio) |
a2826aa9 | 525 | { |
4bc034d3 N |
526 | struct md_rdev *rdev = bio->bi_private; |
527 | struct mddev *mddev = rdev->mddev; | |
a2826aa9 N |
528 | |
529 | rdev_dec_pending(rdev, mddev); | |
530 | ||
4bc034d3 N |
531 | if (atomic_dec_and_test(&mddev->flush_pending)) { |
532 | /* The pre-request flush has finished */ | |
533 | queue_work(md_wq, &mddev->flush_work); | |
a2826aa9 | 534 | } |
4bc034d3 | 535 | bio_put(bio); |
5a409b4f | 536 | } |
a7a07e69 | 537 | |
4bc034d3 N |
538 | static void md_submit_flush_data(struct work_struct *ws); |
539 | ||
540 | static void submit_flushes(struct work_struct *ws) | |
a2826aa9 | 541 | { |
4bc034d3 | 542 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); |
3cb03002 | 543 | struct md_rdev *rdev; |
a2826aa9 | 544 | |
2bc13b83 | 545 | mddev->start_flush = ktime_get_boottime(); |
4bc034d3 N |
546 | INIT_WORK(&mddev->flush_work, md_submit_flush_data); |
547 | atomic_set(&mddev->flush_pending, 1); | |
a2826aa9 | 548 | rcu_read_lock(); |
dafb20fa | 549 | rdev_for_each_rcu(rdev, mddev) |
a2826aa9 N |
550 | if (rdev->raid_disk >= 0 && |
551 | !test_bit(Faulty, &rdev->flags)) { | |
552 | /* Take two references, one is dropped | |
553 | * when request finishes, one after | |
554 | * we reclaim rcu_read_lock | |
555 | */ | |
556 | struct bio *bi; | |
557 | atomic_inc(&rdev->nr_pending); | |
558 | atomic_inc(&rdev->nr_pending); | |
559 | rcu_read_unlock(); | |
a78f18da | 560 | bi = bio_alloc_bioset(GFP_NOIO, 0, &mddev->bio_set); |
5a409b4f | 561 | bi->bi_end_io = md_end_flush; |
4bc034d3 N |
562 | bi->bi_private = rdev; |
563 | bio_set_dev(bi, rdev->bdev); | |
70fd7614 | 564 | bi->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH; |
4bc034d3 | 565 | atomic_inc(&mddev->flush_pending); |
4e49ea4a | 566 | submit_bio(bi); |
a2826aa9 N |
567 | rcu_read_lock(); |
568 | rdev_dec_pending(rdev, mddev); | |
569 | } | |
570 | rcu_read_unlock(); | |
4bc034d3 N |
571 | if (atomic_dec_and_test(&mddev->flush_pending)) |
572 | queue_work(md_wq, &mddev->flush_work); | |
573 | } | |
a2826aa9 | 574 | |
4bc034d3 N |
575 | static void md_submit_flush_data(struct work_struct *ws) |
576 | { | |
577 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); | |
578 | struct bio *bio = mddev->flush_bio; | |
579 | ||
580 | /* | |
581 | * must reset flush_bio before calling into md_handle_request to avoid a | |
582 | * deadlock, because other bios passed md_handle_request suspend check | |
583 | * could wait for this and below md_handle_request could wait for those | |
584 | * bios because of suspend check | |
585 | */ | |
dc5d17a3 | 586 | spin_lock_irq(&mddev->lock); |
81ba3c24 | 587 | mddev->prev_flush_start = mddev->start_flush; |
4bc034d3 | 588 | mddev->flush_bio = NULL; |
dc5d17a3 | 589 | spin_unlock_irq(&mddev->lock); |
4bc034d3 N |
590 | wake_up(&mddev->sb_wait); |
591 | ||
592 | if (bio->bi_iter.bi_size == 0) { | |
593 | /* an empty barrier - all done */ | |
594 | bio_endio(bio); | |
595 | } else { | |
596 | bio->bi_opf &= ~REQ_PREFLUSH; | |
597 | md_handle_request(mddev, bio); | |
a2826aa9 | 598 | } |
a2826aa9 | 599 | } |
4bc034d3 | 600 | |
775d7831 DJ |
601 | /* |
602 | * Manages consolidation of flushes and submitting any flushes needed for | |
603 | * a bio with REQ_PREFLUSH. Returns true if the bio is finished or is | |
604 | * being finished in another context. Returns false if the flushing is | |
605 | * complete but still needs the I/O portion of the bio to be processed. | |
606 | */ | |
607 | bool md_flush_request(struct mddev *mddev, struct bio *bio) | |
4bc034d3 | 608 | { |
81ba3c24 | 609 | ktime_t req_start = ktime_get_boottime(); |
4bc034d3 | 610 | spin_lock_irq(&mddev->lock); |
204d1a64 PG |
611 | /* flush requests wait until ongoing flush completes, |
612 | * hence coalescing all the pending requests. | |
613 | */ | |
4bc034d3 | 614 | wait_event_lock_irq(mddev->sb_wait, |
2bc13b83 | 615 | !mddev->flush_bio || |
a23f2aae | 616 | ktime_before(req_start, mddev->prev_flush_start), |
4bc034d3 | 617 | mddev->lock); |
204d1a64 | 618 | /* new request after previous flush is completed */ |
a23f2aae | 619 | if (ktime_after(req_start, mddev->prev_flush_start)) { |
2bc13b83 N |
620 | WARN_ON(mddev->flush_bio); |
621 | mddev->flush_bio = bio; | |
622 | bio = NULL; | |
623 | } | |
4bc034d3 N |
624 | spin_unlock_irq(&mddev->lock); |
625 | ||
2bc13b83 N |
626 | if (!bio) { |
627 | INIT_WORK(&mddev->flush_work, submit_flushes); | |
628 | queue_work(md_wq, &mddev->flush_work); | |
629 | } else { | |
630 | /* flush was performed for some other bio while we waited. */ | |
631 | if (bio->bi_iter.bi_size == 0) | |
632 | /* an empty barrier - all done */ | |
633 | bio_endio(bio); | |
634 | else { | |
635 | bio->bi_opf &= ~REQ_PREFLUSH; | |
775d7831 | 636 | return false; |
2bc13b83 N |
637 | } |
638 | } | |
775d7831 | 639 | return true; |
4bc034d3 | 640 | } |
e9c7469b | 641 | EXPORT_SYMBOL(md_flush_request); |
409c57f3 | 642 | |
fd01b88c | 643 | static inline struct mddev *mddev_get(struct mddev *mddev) |
1da177e4 LT |
644 | { |
645 | atomic_inc(&mddev->active); | |
646 | return mddev; | |
647 | } | |
648 | ||
5fd3a17e | 649 | static void mddev_delayed_delete(struct work_struct *ws); |
d3374825 | 650 | |
fd01b88c | 651 | static void mddev_put(struct mddev *mddev) |
1da177e4 LT |
652 | { |
653 | if (!atomic_dec_and_lock(&mddev->active, &all_mddevs_lock)) | |
654 | return; | |
d3374825 | 655 | if (!mddev->raid_disks && list_empty(&mddev->disks) && |
cbd19983 N |
656 | mddev->ctime == 0 && !mddev->hold_active) { |
657 | /* Array is not configured at all, and not held active, | |
658 | * so destroy it */ | |
af8a2434 | 659 | list_del_init(&mddev->all_mddevs); |
28dec870 KO |
660 | |
661 | /* | |
662 | * Call queue_work inside the spinlock so that | |
663 | * flush_workqueue() after mddev_find will succeed in waiting | |
664 | * for the work to be done. | |
665 | */ | |
666 | INIT_WORK(&mddev->del_work, mddev_delayed_delete); | |
667 | queue_work(md_misc_wq, &mddev->del_work); | |
d3374825 N |
668 | } |
669 | spin_unlock(&all_mddevs_lock); | |
1da177e4 LT |
670 | } |
671 | ||
8376d3c1 | 672 | static void md_safemode_timeout(struct timer_list *t); |
25b2edfa | 673 | |
fd01b88c | 674 | void mddev_init(struct mddev *mddev) |
fafd7fb0 | 675 | { |
28dec870 | 676 | kobject_init(&mddev->kobj, &md_ktype); |
fafd7fb0 N |
677 | mutex_init(&mddev->open_mutex); |
678 | mutex_init(&mddev->reconfig_mutex); | |
679 | mutex_init(&mddev->bitmap_info.mutex); | |
680 | INIT_LIST_HEAD(&mddev->disks); | |
681 | INIT_LIST_HEAD(&mddev->all_mddevs); | |
8376d3c1 | 682 | timer_setup(&mddev->safemode_timer, md_safemode_timeout, 0); |
fafd7fb0 N |
683 | atomic_set(&mddev->active, 1); |
684 | atomic_set(&mddev->openers, 0); | |
685 | atomic_set(&mddev->active_io, 0); | |
85572d7c | 686 | spin_lock_init(&mddev->lock); |
4bc034d3 | 687 | atomic_set(&mddev->flush_pending, 0); |
fafd7fb0 N |
688 | init_waitqueue_head(&mddev->sb_wait); |
689 | init_waitqueue_head(&mddev->recovery_wait); | |
690 | mddev->reshape_position = MaxSector; | |
2c810cdd | 691 | mddev->reshape_backwards = 0; |
c4a39551 | 692 | mddev->last_sync_action = "none"; |
fafd7fb0 N |
693 | mddev->resync_min = 0; |
694 | mddev->resync_max = MaxSector; | |
695 | mddev->level = LEVEL_NONE; | |
696 | } | |
390ee602 | 697 | EXPORT_SYMBOL_GPL(mddev_init); |
fafd7fb0 | 698 | |
8b57251f CH |
699 | static struct mddev *mddev_find_locked(dev_t unit) |
700 | { | |
701 | struct mddev *mddev; | |
702 | ||
703 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
704 | if (mddev->unit == unit) | |
705 | return mddev; | |
706 | ||
707 | return NULL; | |
708 | } | |
709 | ||
85c8c3c1 CH |
710 | /* find an unused unit number */ |
711 | static dev_t mddev_alloc_unit(void) | |
712 | { | |
713 | static int next_minor = 512; | |
714 | int start = next_minor; | |
715 | bool is_free = 0; | |
716 | dev_t dev = 0; | |
717 | ||
718 | while (!is_free) { | |
719 | dev = MKDEV(MD_MAJOR, next_minor); | |
720 | next_minor++; | |
721 | if (next_minor > MINORMASK) | |
722 | next_minor = 0; | |
723 | if (next_minor == start) | |
724 | return 0; /* Oh dear, all in use. */ | |
725 | is_free = !mddev_find_locked(dev); | |
726 | } | |
727 | ||
728 | return dev; | |
729 | } | |
730 | ||
f72ffdd6 | 731 | static struct mddev *mddev_find(dev_t unit) |
65aa97c4 CH |
732 | { |
733 | struct mddev *mddev; | |
734 | ||
735 | if (MAJOR(unit) != MD_MAJOR) | |
736 | unit &= ~((1 << MdpMinorShift) - 1); | |
737 | ||
738 | spin_lock(&all_mddevs_lock); | |
739 | mddev = mddev_find_locked(unit); | |
740 | if (mddev) | |
741 | mddev_get(mddev); | |
742 | spin_unlock(&all_mddevs_lock); | |
743 | ||
744 | return mddev; | |
745 | } | |
746 | ||
0d809b38 | 747 | static struct mddev *mddev_alloc(dev_t unit) |
1da177e4 | 748 | { |
0d809b38 CH |
749 | struct mddev *new; |
750 | int error; | |
1da177e4 | 751 | |
8f5f02c4 | 752 | if (unit && MAJOR(unit) != MD_MAJOR) |
d144fe6f | 753 | unit &= ~((1 << MdpMinorShift) - 1); |
8f5f02c4 | 754 | |
d144fe6f CH |
755 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
756 | if (!new) | |
0d809b38 | 757 | return ERR_PTR(-ENOMEM); |
d144fe6f | 758 | mddev_init(new); |
efeb53c0 | 759 | |
d144fe6f | 760 | spin_lock(&all_mddevs_lock); |
efeb53c0 | 761 | if (unit) { |
0d809b38 CH |
762 | error = -EEXIST; |
763 | if (mddev_find_locked(unit)) | |
d144fe6f | 764 | goto out_free_new; |
d144fe6f CH |
765 | new->unit = unit; |
766 | if (MAJOR(unit) == MD_MAJOR) | |
767 | new->md_minor = MINOR(unit); | |
768 | else | |
769 | new->md_minor = MINOR(unit) >> MdpMinorShift; | |
770 | new->hold_active = UNTIL_IOCTL; | |
771 | } else { | |
0d809b38 | 772 | error = -ENODEV; |
85c8c3c1 | 773 | new->unit = mddev_alloc_unit(); |
d144fe6f CH |
774 | if (!new->unit) |
775 | goto out_free_new; | |
85c8c3c1 | 776 | new->md_minor = MINOR(new->unit); |
efeb53c0 | 777 | new->hold_active = UNTIL_STOP; |
1da177e4 | 778 | } |
1da177e4 | 779 | |
d144fe6f CH |
780 | list_add(&new->all_mddevs, &all_mddevs); |
781 | spin_unlock(&all_mddevs_lock); | |
782 | return new; | |
783 | out_free_new: | |
784 | spin_unlock(&all_mddevs_lock); | |
785 | kfree(new); | |
0d809b38 | 786 | return ERR_PTR(error); |
1da177e4 LT |
787 | } |
788 | ||
c32dc040 | 789 | static const struct attribute_group md_redundancy_group; |
b6eb127d | 790 | |
5c47daf6 | 791 | void mddev_unlock(struct mddev *mddev) |
1da177e4 | 792 | { |
a64c876f | 793 | if (mddev->to_remove) { |
b6eb127d N |
794 | /* These cannot be removed under reconfig_mutex as |
795 | * an access to the files will try to take reconfig_mutex | |
796 | * while holding the file unremovable, which leads to | |
797 | * a deadlock. | |
bb4f1e9d N |
798 | * So hold set sysfs_active while the remove in happeing, |
799 | * and anything else which might set ->to_remove or my | |
800 | * otherwise change the sysfs namespace will fail with | |
801 | * -EBUSY if sysfs_active is still set. | |
802 | * We set sysfs_active under reconfig_mutex and elsewhere | |
803 | * test it under the same mutex to ensure its correct value | |
804 | * is seen. | |
b6eb127d | 805 | */ |
c32dc040 | 806 | const struct attribute_group *to_remove = mddev->to_remove; |
a64c876f | 807 | mddev->to_remove = NULL; |
bb4f1e9d | 808 | mddev->sysfs_active = 1; |
b6eb127d N |
809 | mutex_unlock(&mddev->reconfig_mutex); |
810 | ||
00bcb4ac N |
811 | if (mddev->kobj.sd) { |
812 | if (to_remove != &md_redundancy_group) | |
813 | sysfs_remove_group(&mddev->kobj, to_remove); | |
814 | if (mddev->pers == NULL || | |
815 | mddev->pers->sync_request == NULL) { | |
816 | sysfs_remove_group(&mddev->kobj, &md_redundancy_group); | |
817 | if (mddev->sysfs_action) | |
818 | sysfs_put(mddev->sysfs_action); | |
e8efa9b8 JB |
819 | if (mddev->sysfs_completed) |
820 | sysfs_put(mddev->sysfs_completed); | |
821 | if (mddev->sysfs_degraded) | |
822 | sysfs_put(mddev->sysfs_degraded); | |
00bcb4ac | 823 | mddev->sysfs_action = NULL; |
e8efa9b8 JB |
824 | mddev->sysfs_completed = NULL; |
825 | mddev->sysfs_degraded = NULL; | |
00bcb4ac | 826 | } |
a64c876f | 827 | } |
bb4f1e9d | 828 | mddev->sysfs_active = 0; |
b6eb127d N |
829 | } else |
830 | mutex_unlock(&mddev->reconfig_mutex); | |
1da177e4 | 831 | |
751e67ca CD |
832 | /* As we've dropped the mutex we need a spinlock to |
833 | * make sure the thread doesn't disappear | |
01f96c0a N |
834 | */ |
835 | spin_lock(&pers_lock); | |
005eca5e | 836 | md_wakeup_thread(mddev->thread); |
4d5324f7 | 837 | wake_up(&mddev->sb_wait); |
01f96c0a | 838 | spin_unlock(&pers_lock); |
1da177e4 | 839 | } |
5c47daf6 | 840 | EXPORT_SYMBOL_GPL(mddev_unlock); |
1da177e4 | 841 | |
57d051dc | 842 | struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr) |
1ca69c4b N |
843 | { |
844 | struct md_rdev *rdev; | |
845 | ||
846 | rdev_for_each_rcu(rdev, mddev) | |
847 | if (rdev->desc_nr == nr) | |
848 | return rdev; | |
849 | ||
850 | return NULL; | |
851 | } | |
57d051dc | 852 | EXPORT_SYMBOL_GPL(md_find_rdev_nr_rcu); |
1ca69c4b N |
853 | |
854 | static struct md_rdev *find_rdev(struct mddev *mddev, dev_t dev) | |
1da177e4 | 855 | { |
3cb03002 | 856 | struct md_rdev *rdev; |
1da177e4 | 857 | |
dafb20fa | 858 | rdev_for_each(rdev, mddev) |
1da177e4 LT |
859 | if (rdev->bdev->bd_dev == dev) |
860 | return rdev; | |
159ec1fc | 861 | |
1da177e4 LT |
862 | return NULL; |
863 | } | |
864 | ||
1532d9e8 | 865 | struct md_rdev *md_find_rdev_rcu(struct mddev *mddev, dev_t dev) |
1ca69c4b N |
866 | { |
867 | struct md_rdev *rdev; | |
868 | ||
869 | rdev_for_each_rcu(rdev, mddev) | |
870 | if (rdev->bdev->bd_dev == dev) | |
871 | return rdev; | |
872 | ||
873 | return NULL; | |
874 | } | |
1532d9e8 | 875 | EXPORT_SYMBOL_GPL(md_find_rdev_rcu); |
1ca69c4b | 876 | |
84fc4b56 | 877 | static struct md_personality *find_pers(int level, char *clevel) |
2604b703 | 878 | { |
84fc4b56 | 879 | struct md_personality *pers; |
d9d166c2 N |
880 | list_for_each_entry(pers, &pers_list, list) { |
881 | if (level != LEVEL_NONE && pers->level == level) | |
2604b703 | 882 | return pers; |
d9d166c2 N |
883 | if (strcmp(pers->name, clevel)==0) |
884 | return pers; | |
885 | } | |
2604b703 N |
886 | return NULL; |
887 | } | |
888 | ||
b73df2d3 | 889 | /* return the offset of the super block in 512byte sectors */ |
3cb03002 | 890 | static inline sector_t calc_dev_sboffset(struct md_rdev *rdev) |
1da177e4 | 891 | { |
57b2caa3 | 892 | sector_t num_sectors = i_size_read(rdev->bdev->bd_inode) / 512; |
b73df2d3 | 893 | return MD_NEW_SIZE_SECTORS(num_sectors); |
1da177e4 LT |
894 | } |
895 | ||
f72ffdd6 | 896 | static int alloc_disk_sb(struct md_rdev *rdev) |
1da177e4 | 897 | { |
1da177e4 | 898 | rdev->sb_page = alloc_page(GFP_KERNEL); |
7f0f0d87 | 899 | if (!rdev->sb_page) |
ebc24337 | 900 | return -ENOMEM; |
1da177e4 LT |
901 | return 0; |
902 | } | |
903 | ||
545c8795 | 904 | void md_rdev_clear(struct md_rdev *rdev) |
1da177e4 LT |
905 | { |
906 | if (rdev->sb_page) { | |
2d1f3b5d | 907 | put_page(rdev->sb_page); |
1da177e4 LT |
908 | rdev->sb_loaded = 0; |
909 | rdev->sb_page = NULL; | |
0f420358 | 910 | rdev->sb_start = 0; |
dd8ac336 | 911 | rdev->sectors = 0; |
1da177e4 | 912 | } |
2699b672 N |
913 | if (rdev->bb_page) { |
914 | put_page(rdev->bb_page); | |
915 | rdev->bb_page = NULL; | |
916 | } | |
d3b407fb | 917 | badblocks_exit(&rdev->badblocks); |
1da177e4 | 918 | } |
545c8795 | 919 | EXPORT_SYMBOL_GPL(md_rdev_clear); |
1da177e4 | 920 | |
4246a0b6 | 921 | static void super_written(struct bio *bio) |
7bfa19f2 | 922 | { |
3cb03002 | 923 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 924 | struct mddev *mddev = rdev->mddev; |
7bfa19f2 | 925 | |
4e4cbee9 | 926 | if (bio->bi_status) { |
b3db8a21 GJ |
927 | pr_err("md: %s gets error=%d\n", __func__, |
928 | blk_status_to_errno(bio->bi_status)); | |
a9701a30 | 929 | md_error(mddev, rdev); |
46533ff7 N |
930 | if (!test_bit(Faulty, &rdev->flags) |
931 | && (bio->bi_opf & MD_FAILFAST)) { | |
2953079c | 932 | set_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags); |
46533ff7 N |
933 | set_bit(LastDev, &rdev->flags); |
934 | } | |
935 | } else | |
936 | clear_bit(LastDev, &rdev->flags); | |
7bfa19f2 | 937 | |
a9701a30 N |
938 | if (atomic_dec_and_test(&mddev->pending_writes)) |
939 | wake_up(&mddev->sb_wait); | |
ed3b98c7 | 940 | rdev_dec_pending(rdev, mddev); |
f8b58edf | 941 | bio_put(bio); |
7bfa19f2 N |
942 | } |
943 | ||
fd01b88c | 944 | void md_super_write(struct mddev *mddev, struct md_rdev *rdev, |
7bfa19f2 N |
945 | sector_t sector, int size, struct page *page) |
946 | { | |
947 | /* write first size bytes of page to sector of rdev | |
948 | * Increment mddev->pending_writes before returning | |
949 | * and decrement it on completion, waking up sb_wait | |
950 | * if zero is reached. | |
951 | * If an error occurred, call md_error | |
952 | */ | |
46533ff7 N |
953 | struct bio *bio; |
954 | int ff = 0; | |
955 | ||
4b6c1060 HM |
956 | if (!page) |
957 | return; | |
958 | ||
46533ff7 N |
959 | if (test_bit(Faulty, &rdev->flags)) |
960 | return; | |
961 | ||
6a596569 | 962 | bio = bio_alloc_bioset(GFP_NOIO, 1, &mddev->sync_set); |
7bfa19f2 | 963 | |
ed3b98c7 SL |
964 | atomic_inc(&rdev->nr_pending); |
965 | ||
74d46992 | 966 | bio_set_dev(bio, rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev); |
4f024f37 | 967 | bio->bi_iter.bi_sector = sector; |
7bfa19f2 N |
968 | bio_add_page(bio, page, size, 0); |
969 | bio->bi_private = rdev; | |
970 | bio->bi_end_io = super_written; | |
46533ff7 N |
971 | |
972 | if (test_bit(MD_FAILFAST_SUPPORTED, &mddev->flags) && | |
973 | test_bit(FailFast, &rdev->flags) && | |
974 | !test_bit(LastDev, &rdev->flags)) | |
975 | ff = MD_FAILFAST; | |
5a8948f8 | 976 | bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH | REQ_FUA | ff; |
a9701a30 | 977 | |
7bfa19f2 | 978 | atomic_inc(&mddev->pending_writes); |
4e49ea4a | 979 | submit_bio(bio); |
a9701a30 N |
980 | } |
981 | ||
46533ff7 | 982 | int md_super_wait(struct mddev *mddev) |
a9701a30 | 983 | { |
e9c7469b | 984 | /* wait for all superblock writes that were scheduled to complete */ |
1967cd56 | 985 | wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0); |
2953079c | 986 | if (test_and_clear_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags)) |
46533ff7 N |
987 | return -EAGAIN; |
988 | return 0; | |
7bfa19f2 N |
989 | } |
990 | ||
3cb03002 | 991 | int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, |
796a5cf0 | 992 | struct page *page, int op, int op_flags, bool metadata_op) |
1da177e4 | 993 | { |
32637385 CH |
994 | struct bio bio; |
995 | struct bio_vec bvec; | |
996 | ||
997 | bio_init(&bio, &bvec, 1); | |
1da177e4 | 998 | |
74d46992 | 999 | if (metadata_op && rdev->meta_bdev) |
32637385 | 1000 | bio_set_dev(&bio, rdev->meta_bdev); |
74d46992 | 1001 | else |
32637385 CH |
1002 | bio_set_dev(&bio, rdev->bdev); |
1003 | bio.bi_opf = op | op_flags; | |
ccebd4c4 | 1004 | if (metadata_op) |
32637385 | 1005 | bio.bi_iter.bi_sector = sector + rdev->sb_start; |
1fdd6fc9 N |
1006 | else if (rdev->mddev->reshape_position != MaxSector && |
1007 | (rdev->mddev->reshape_backwards == | |
1008 | (sector >= rdev->mddev->reshape_position))) | |
32637385 | 1009 | bio.bi_iter.bi_sector = sector + rdev->new_data_offset; |
ccebd4c4 | 1010 | else |
32637385 CH |
1011 | bio.bi_iter.bi_sector = sector + rdev->data_offset; |
1012 | bio_add_page(&bio, page, size, 0); | |
4e49ea4a | 1013 | |
32637385 | 1014 | submit_bio_wait(&bio); |
1da177e4 | 1015 | |
32637385 | 1016 | return !bio.bi_status; |
1da177e4 | 1017 | } |
a8745db2 | 1018 | EXPORT_SYMBOL_GPL(sync_page_io); |
1da177e4 | 1019 | |
f72ffdd6 | 1020 | static int read_disk_sb(struct md_rdev *rdev, int size) |
1da177e4 LT |
1021 | { |
1022 | char b[BDEVNAME_SIZE]; | |
403df478 | 1023 | |
1da177e4 LT |
1024 | if (rdev->sb_loaded) |
1025 | return 0; | |
1026 | ||
796a5cf0 | 1027 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, REQ_OP_READ, 0, true)) |
1da177e4 LT |
1028 | goto fail; |
1029 | rdev->sb_loaded = 1; | |
1030 | return 0; | |
1031 | ||
1032 | fail: | |
9d48739e N |
1033 | pr_err("md: disabled device %s, could not read superblock.\n", |
1034 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
1035 | return -EINVAL; |
1036 | } | |
1037 | ||
e6fd2093 | 1038 | static int md_uuid_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 | 1039 | { |
f72ffdd6 | 1040 | return sb1->set_uuid0 == sb2->set_uuid0 && |
05710466 AN |
1041 | sb1->set_uuid1 == sb2->set_uuid1 && |
1042 | sb1->set_uuid2 == sb2->set_uuid2 && | |
1043 | sb1->set_uuid3 == sb2->set_uuid3; | |
1da177e4 LT |
1044 | } |
1045 | ||
e6fd2093 | 1046 | static int md_sb_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 LT |
1047 | { |
1048 | int ret; | |
1049 | mdp_super_t *tmp1, *tmp2; | |
1050 | ||
1051 | tmp1 = kmalloc(sizeof(*tmp1),GFP_KERNEL); | |
1052 | tmp2 = kmalloc(sizeof(*tmp2),GFP_KERNEL); | |
1053 | ||
1054 | if (!tmp1 || !tmp2) { | |
1055 | ret = 0; | |
1da177e4 LT |
1056 | goto abort; |
1057 | } | |
1058 | ||
1059 | *tmp1 = *sb1; | |
1060 | *tmp2 = *sb2; | |
1061 | ||
1062 | /* | |
1063 | * nr_disks is not constant | |
1064 | */ | |
1065 | tmp1->nr_disks = 0; | |
1066 | tmp2->nr_disks = 0; | |
1067 | ||
ce0c8e05 | 1068 | ret = (memcmp(tmp1, tmp2, MD_SB_GENERIC_CONSTANT_WORDS * 4) == 0); |
1da177e4 | 1069 | abort: |
990a8baf JJ |
1070 | kfree(tmp1); |
1071 | kfree(tmp2); | |
1da177e4 LT |
1072 | return ret; |
1073 | } | |
1074 | ||
4d167f09 N |
1075 | static u32 md_csum_fold(u32 csum) |
1076 | { | |
1077 | csum = (csum & 0xffff) + (csum >> 16); | |
1078 | return (csum & 0xffff) + (csum >> 16); | |
1079 | } | |
1080 | ||
f72ffdd6 | 1081 | static unsigned int calc_sb_csum(mdp_super_t *sb) |
1da177e4 | 1082 | { |
4d167f09 N |
1083 | u64 newcsum = 0; |
1084 | u32 *sb32 = (u32*)sb; | |
1085 | int i; | |
1da177e4 LT |
1086 | unsigned int disk_csum, csum; |
1087 | ||
1088 | disk_csum = sb->sb_csum; | |
1089 | sb->sb_csum = 0; | |
4d167f09 N |
1090 | |
1091 | for (i = 0; i < MD_SB_BYTES/4 ; i++) | |
1092 | newcsum += sb32[i]; | |
1093 | csum = (newcsum & 0xffffffff) + (newcsum>>32); | |
1094 | ||
4d167f09 N |
1095 | #ifdef CONFIG_ALPHA |
1096 | /* This used to use csum_partial, which was wrong for several | |
1097 | * reasons including that different results are returned on | |
1098 | * different architectures. It isn't critical that we get exactly | |
1099 | * the same return value as before (we always csum_fold before | |
1100 | * testing, and that removes any differences). However as we | |
1101 | * know that csum_partial always returned a 16bit value on | |
1102 | * alphas, do a fold to maximise conformity to previous behaviour. | |
1103 | */ | |
1104 | sb->sb_csum = md_csum_fold(disk_csum); | |
1105 | #else | |
1da177e4 | 1106 | sb->sb_csum = disk_csum; |
4d167f09 | 1107 | #endif |
1da177e4 LT |
1108 | return csum; |
1109 | } | |
1110 | ||
1da177e4 LT |
1111 | /* |
1112 | * Handle superblock details. | |
1113 | * We want to be able to handle multiple superblock formats | |
1114 | * so we have a common interface to them all, and an array of | |
1115 | * different handlers. | |
1116 | * We rely on user-space to write the initial superblock, and support | |
1117 | * reading and updating of superblocks. | |
1118 | * Interface methods are: | |
3cb03002 | 1119 | * int load_super(struct md_rdev *dev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1120 | * loads and validates a superblock on dev. |
1121 | * if refdev != NULL, compare superblocks on both devices | |
1122 | * Return: | |
1123 | * 0 - dev has a superblock that is compatible with refdev | |
1124 | * 1 - dev has a superblock that is compatible and newer than refdev | |
1125 | * so dev should be used as the refdev in future | |
1126 | * -EINVAL superblock incompatible or invalid | |
1127 | * -othererror e.g. -EIO | |
1128 | * | |
fd01b88c | 1129 | * int validate_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1130 | * Verify that dev is acceptable into mddev. |
1131 | * The first time, mddev->raid_disks will be 0, and data from | |
1132 | * dev should be merged in. Subsequent calls check that dev | |
1133 | * is new enough. Return 0 or -EINVAL | |
1134 | * | |
fd01b88c | 1135 | * void sync_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1136 | * Update the superblock for rdev with data in mddev |
1137 | * This does not write to disc. | |
1138 | * | |
1139 | */ | |
1140 | ||
1141 | struct super_type { | |
0cd17fec CW |
1142 | char *name; |
1143 | struct module *owner; | |
c6563a8c N |
1144 | int (*load_super)(struct md_rdev *rdev, |
1145 | struct md_rdev *refdev, | |
0cd17fec | 1146 | int minor_version); |
c6563a8c N |
1147 | int (*validate_super)(struct mddev *mddev, |
1148 | struct md_rdev *rdev); | |
1149 | void (*sync_super)(struct mddev *mddev, | |
1150 | struct md_rdev *rdev); | |
3cb03002 | 1151 | unsigned long long (*rdev_size_change)(struct md_rdev *rdev, |
15f4a5fd | 1152 | sector_t num_sectors); |
c6563a8c N |
1153 | int (*allow_new_offset)(struct md_rdev *rdev, |
1154 | unsigned long long new_offset); | |
1da177e4 LT |
1155 | }; |
1156 | ||
0894cc30 AN |
1157 | /* |
1158 | * Check that the given mddev has no bitmap. | |
1159 | * | |
1160 | * This function is called from the run method of all personalities that do not | |
1161 | * support bitmaps. It prints an error message and returns non-zero if mddev | |
1162 | * has a bitmap. Otherwise, it returns 0. | |
1163 | * | |
1164 | */ | |
fd01b88c | 1165 | int md_check_no_bitmap(struct mddev *mddev) |
0894cc30 | 1166 | { |
c3d9714e | 1167 | if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset) |
0894cc30 | 1168 | return 0; |
9d48739e | 1169 | pr_warn("%s: bitmaps are not supported for %s\n", |
0894cc30 AN |
1170 | mdname(mddev), mddev->pers->name); |
1171 | return 1; | |
1172 | } | |
1173 | EXPORT_SYMBOL(md_check_no_bitmap); | |
1174 | ||
1da177e4 | 1175 | /* |
f72ffdd6 | 1176 | * load_super for 0.90.0 |
1da177e4 | 1177 | */ |
3cb03002 | 1178 | static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1179 | { |
1180 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
1181 | mdp_super_t *sb; | |
1182 | int ret; | |
228fc7d7 | 1183 | bool spare_disk = true; |
1da177e4 LT |
1184 | |
1185 | /* | |
0f420358 | 1186 | * Calculate the position of the superblock (512byte sectors), |
1da177e4 LT |
1187 | * it's at the end of the disk. |
1188 | * | |
1189 | * It also happens to be a multiple of 4Kb. | |
1190 | */ | |
57b2caa3 | 1191 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 1192 | |
0002b271 | 1193 | ret = read_disk_sb(rdev, MD_SB_BYTES); |
9d48739e N |
1194 | if (ret) |
1195 | return ret; | |
1da177e4 LT |
1196 | |
1197 | ret = -EINVAL; | |
1198 | ||
1199 | bdevname(rdev->bdev, b); | |
65a06f06 | 1200 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1201 | |
1202 | if (sb->md_magic != MD_SB_MAGIC) { | |
9d48739e | 1203 | pr_warn("md: invalid raid superblock magic on %s\n", b); |
1da177e4 LT |
1204 | goto abort; |
1205 | } | |
1206 | ||
1207 | if (sb->major_version != 0 || | |
f6705578 N |
1208 | sb->minor_version < 90 || |
1209 | sb->minor_version > 91) { | |
9d48739e N |
1210 | pr_warn("Bad version number %d.%d on %s\n", |
1211 | sb->major_version, sb->minor_version, b); | |
1da177e4 LT |
1212 | goto abort; |
1213 | } | |
1214 | ||
1215 | if (sb->raid_disks <= 0) | |
1216 | goto abort; | |
1217 | ||
4d167f09 | 1218 | if (md_csum_fold(calc_sb_csum(sb)) != md_csum_fold(sb->sb_csum)) { |
9d48739e | 1219 | pr_warn("md: invalid superblock checksum on %s\n", b); |
1da177e4 LT |
1220 | goto abort; |
1221 | } | |
1222 | ||
1223 | rdev->preferred_minor = sb->md_minor; | |
1224 | rdev->data_offset = 0; | |
c6563a8c | 1225 | rdev->new_data_offset = 0; |
0002b271 | 1226 | rdev->sb_size = MD_SB_BYTES; |
9f2f3830 | 1227 | rdev->badblocks.shift = -1; |
1da177e4 LT |
1228 | |
1229 | if (sb->level == LEVEL_MULTIPATH) | |
1230 | rdev->desc_nr = -1; | |
1231 | else | |
1232 | rdev->desc_nr = sb->this_disk.number; | |
1233 | ||
228fc7d7 YY |
1234 | /* not spare disk, or LEVEL_MULTIPATH */ |
1235 | if (sb->level == LEVEL_MULTIPATH || | |
1236 | (rdev->desc_nr >= 0 && | |
3b7436cc | 1237 | rdev->desc_nr < MD_SB_DISKS && |
228fc7d7 YY |
1238 | sb->disks[rdev->desc_nr].state & |
1239 | ((1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE)))) | |
1240 | spare_disk = false; | |
1241 | ||
9a7b2b0f | 1242 | if (!refdev) { |
228fc7d7 | 1243 | if (!spare_disk) |
6a5cb53a YY |
1244 | ret = 1; |
1245 | else | |
1246 | ret = 0; | |
9a7b2b0f | 1247 | } else { |
1da177e4 | 1248 | __u64 ev1, ev2; |
65a06f06 | 1249 | mdp_super_t *refsb = page_address(refdev->sb_page); |
e6fd2093 | 1250 | if (!md_uuid_equal(refsb, sb)) { |
9d48739e | 1251 | pr_warn("md: %s has different UUID to %s\n", |
1da177e4 LT |
1252 | b, bdevname(refdev->bdev,b2)); |
1253 | goto abort; | |
1254 | } | |
e6fd2093 | 1255 | if (!md_sb_equal(refsb, sb)) { |
9d48739e N |
1256 | pr_warn("md: %s has same UUID but different superblock to %s\n", |
1257 | b, bdevname(refdev->bdev, b2)); | |
1da177e4 LT |
1258 | goto abort; |
1259 | } | |
1260 | ev1 = md_event(sb); | |
1261 | ev2 = md_event(refsb); | |
6a5cb53a | 1262 | |
228fc7d7 | 1263 | if (!spare_disk && ev1 > ev2) |
1da177e4 | 1264 | ret = 1; |
f72ffdd6 | 1265 | else |
1da177e4 LT |
1266 | ret = 0; |
1267 | } | |
8190e754 | 1268 | rdev->sectors = rdev->sb_start; |
667a5313 N |
1269 | /* Limit to 4TB as metadata cannot record more than that. |
1270 | * (not needed for Linear and RAID0 as metadata doesn't | |
1271 | * record this size) | |
1272 | */ | |
72deb455 | 1273 | if ((u64)rdev->sectors >= (2ULL << 32) && sb->level >= 1) |
3312c951 | 1274 | rdev->sectors = (sector_t)(2ULL << 32) - 2; |
1da177e4 | 1275 | |
27a7b260 | 1276 | if (rdev->sectors < ((sector_t)sb->size) * 2 && sb->level >= 1) |
2bf071bf N |
1277 | /* "this cannot possibly happen" ... */ |
1278 | ret = -EINVAL; | |
1279 | ||
1da177e4 LT |
1280 | abort: |
1281 | return ret; | |
1282 | } | |
1283 | ||
1284 | /* | |
1285 | * validate_super for 0.90.0 | |
1286 | */ | |
fd01b88c | 1287 | static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1288 | { |
1289 | mdp_disk_t *desc; | |
65a06f06 | 1290 | mdp_super_t *sb = page_address(rdev->sb_page); |
07d84d10 | 1291 | __u64 ev1 = md_event(sb); |
1da177e4 | 1292 | |
41158c7e | 1293 | rdev->raid_disk = -1; |
c5d79adb N |
1294 | clear_bit(Faulty, &rdev->flags); |
1295 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1296 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1297 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1298 | |
1da177e4 LT |
1299 | if (mddev->raid_disks == 0) { |
1300 | mddev->major_version = 0; | |
1301 | mddev->minor_version = sb->minor_version; | |
1302 | mddev->patch_version = sb->patch_version; | |
e691063a | 1303 | mddev->external = 0; |
9d8f0363 | 1304 | mddev->chunk_sectors = sb->chunk_size >> 9; |
1da177e4 LT |
1305 | mddev->ctime = sb->ctime; |
1306 | mddev->utime = sb->utime; | |
1307 | mddev->level = sb->level; | |
d9d166c2 | 1308 | mddev->clevel[0] = 0; |
1da177e4 LT |
1309 | mddev->layout = sb->layout; |
1310 | mddev->raid_disks = sb->raid_disks; | |
27a7b260 | 1311 | mddev->dev_sectors = ((sector_t)sb->size) * 2; |
07d84d10 | 1312 | mddev->events = ev1; |
c3d9714e | 1313 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1314 | mddev->bitmap_info.space = 0; |
1315 | /* bitmap can use 60 K after the 4K superblocks */ | |
c3d9714e | 1316 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 1317 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
2c810cdd | 1318 | mddev->reshape_backwards = 0; |
1da177e4 | 1319 | |
f6705578 N |
1320 | if (mddev->minor_version >= 91) { |
1321 | mddev->reshape_position = sb->reshape_position; | |
1322 | mddev->delta_disks = sb->delta_disks; | |
1323 | mddev->new_level = sb->new_level; | |
1324 | mddev->new_layout = sb->new_layout; | |
664e7c41 | 1325 | mddev->new_chunk_sectors = sb->new_chunk >> 9; |
2c810cdd N |
1326 | if (mddev->delta_disks < 0) |
1327 | mddev->reshape_backwards = 1; | |
f6705578 N |
1328 | } else { |
1329 | mddev->reshape_position = MaxSector; | |
1330 | mddev->delta_disks = 0; | |
1331 | mddev->new_level = mddev->level; | |
1332 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1333 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 | 1334 | } |
33f2c35a N |
1335 | if (mddev->level == 0) |
1336 | mddev->layout = -1; | |
f6705578 | 1337 | |
1da177e4 LT |
1338 | if (sb->state & (1<<MD_SB_CLEAN)) |
1339 | mddev->recovery_cp = MaxSector; | |
1340 | else { | |
f72ffdd6 | 1341 | if (sb->events_hi == sb->cp_events_hi && |
1da177e4 LT |
1342 | sb->events_lo == sb->cp_events_lo) { |
1343 | mddev->recovery_cp = sb->recovery_cp; | |
1344 | } else | |
1345 | mddev->recovery_cp = 0; | |
1346 | } | |
1347 | ||
1348 | memcpy(mddev->uuid+0, &sb->set_uuid0, 4); | |
1349 | memcpy(mddev->uuid+4, &sb->set_uuid1, 4); | |
1350 | memcpy(mddev->uuid+8, &sb->set_uuid2, 4); | |
1351 | memcpy(mddev->uuid+12,&sb->set_uuid3, 4); | |
1352 | ||
1353 | mddev->max_disks = MD_SB_DISKS; | |
a654b9d8 N |
1354 | |
1355 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT) && | |
6409bb05 | 1356 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1357 | mddev->bitmap_info.offset = |
1358 | mddev->bitmap_info.default_offset; | |
6409bb05 | 1359 | mddev->bitmap_info.space = |
c9ad020f | 1360 | mddev->bitmap_info.default_space; |
6409bb05 | 1361 | } |
a654b9d8 | 1362 | |
41158c7e | 1363 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1364 | /* Insist on good event counter while assembling, except |
1365 | * for spares (which don't need an event count) */ | |
1da177e4 | 1366 | ++ev1; |
be6800a7 N |
1367 | if (sb->disks[rdev->desc_nr].state & ( |
1368 | (1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE))) | |
f72ffdd6 | 1369 | if (ev1 < mddev->events) |
be6800a7 | 1370 | return -EINVAL; |
41158c7e N |
1371 | } else if (mddev->bitmap) { |
1372 | /* if adding to array with a bitmap, then we can accept an | |
1373 | * older device ... but not too old. | |
1374 | */ | |
41158c7e N |
1375 | if (ev1 < mddev->bitmap->events_cleared) |
1376 | return 0; | |
8313b8e5 N |
1377 | if (ev1 < mddev->events) |
1378 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1379 | } else { |
1380 | if (ev1 < mddev->events) | |
1381 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1382 | return 0; | |
1383 | } | |
41158c7e | 1384 | |
1da177e4 | 1385 | if (mddev->level != LEVEL_MULTIPATH) { |
1da177e4 LT |
1386 | desc = sb->disks + rdev->desc_nr; |
1387 | ||
1388 | if (desc->state & (1<<MD_DISK_FAULTY)) | |
b2d444d7 | 1389 | set_bit(Faulty, &rdev->flags); |
7c7546cc N |
1390 | else if (desc->state & (1<<MD_DISK_SYNC) /* && |
1391 | desc->raid_disk < mddev->raid_disks */) { | |
b2d444d7 | 1392 | set_bit(In_sync, &rdev->flags); |
1da177e4 | 1393 | rdev->raid_disk = desc->raid_disk; |
f466722c | 1394 | rdev->saved_raid_disk = desc->raid_disk; |
0261cd9f N |
1395 | } else if (desc->state & (1<<MD_DISK_ACTIVE)) { |
1396 | /* active but not in sync implies recovery up to | |
1397 | * reshape position. We don't know exactly where | |
1398 | * that is, so set to zero for now */ | |
1399 | if (mddev->minor_version >= 91) { | |
1400 | rdev->recovery_offset = 0; | |
1401 | rdev->raid_disk = desc->raid_disk; | |
1402 | } | |
1da177e4 | 1403 | } |
8ddf9efe N |
1404 | if (desc->state & (1<<MD_DISK_WRITEMOSTLY)) |
1405 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1406 | if (desc->state & (1<<MD_DISK_FAILFAST)) |
1407 | set_bit(FailFast, &rdev->flags); | |
41158c7e | 1408 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1409 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1410 | return 0; |
1411 | } | |
1412 | ||
1413 | /* | |
1414 | * sync_super for 0.90.0 | |
1415 | */ | |
fd01b88c | 1416 | static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1417 | { |
1418 | mdp_super_t *sb; | |
3cb03002 | 1419 | struct md_rdev *rdev2; |
1da177e4 | 1420 | int next_spare = mddev->raid_disks; |
19133a42 | 1421 | |
1da177e4 LT |
1422 | /* make rdev->sb match mddev data.. |
1423 | * | |
1424 | * 1/ zero out disks | |
1425 | * 2/ Add info for each disk, keeping track of highest desc_nr (next_spare); | |
1426 | * 3/ any empty disks < next_spare become removed | |
1427 | * | |
1428 | * disks[0] gets initialised to REMOVED because | |
1429 | * we cannot be sure from other fields if it has | |
1430 | * been initialised or not. | |
1431 | */ | |
1432 | int i; | |
1433 | int active=0, working=0,failed=0,spare=0,nr_disks=0; | |
1434 | ||
61181565 N |
1435 | rdev->sb_size = MD_SB_BYTES; |
1436 | ||
65a06f06 | 1437 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1438 | |
1439 | memset(sb, 0, sizeof(*sb)); | |
1440 | ||
1441 | sb->md_magic = MD_SB_MAGIC; | |
1442 | sb->major_version = mddev->major_version; | |
1da177e4 LT |
1443 | sb->patch_version = mddev->patch_version; |
1444 | sb->gvalid_words = 0; /* ignored */ | |
1445 | memcpy(&sb->set_uuid0, mddev->uuid+0, 4); | |
1446 | memcpy(&sb->set_uuid1, mddev->uuid+4, 4); | |
1447 | memcpy(&sb->set_uuid2, mddev->uuid+8, 4); | |
1448 | memcpy(&sb->set_uuid3, mddev->uuid+12,4); | |
1449 | ||
9ebc6ef1 | 1450 | sb->ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 1451 | sb->level = mddev->level; |
58c0fed4 | 1452 | sb->size = mddev->dev_sectors / 2; |
1da177e4 LT |
1453 | sb->raid_disks = mddev->raid_disks; |
1454 | sb->md_minor = mddev->md_minor; | |
e691063a | 1455 | sb->not_persistent = 0; |
9ebc6ef1 | 1456 | sb->utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
1457 | sb->state = 0; |
1458 | sb->events_hi = (mddev->events>>32); | |
1459 | sb->events_lo = (u32)mddev->events; | |
1460 | ||
f6705578 N |
1461 | if (mddev->reshape_position == MaxSector) |
1462 | sb->minor_version = 90; | |
1463 | else { | |
1464 | sb->minor_version = 91; | |
1465 | sb->reshape_position = mddev->reshape_position; | |
1466 | sb->new_level = mddev->new_level; | |
1467 | sb->delta_disks = mddev->delta_disks; | |
1468 | sb->new_layout = mddev->new_layout; | |
664e7c41 | 1469 | sb->new_chunk = mddev->new_chunk_sectors << 9; |
f6705578 N |
1470 | } |
1471 | mddev->minor_version = sb->minor_version; | |
1da177e4 LT |
1472 | if (mddev->in_sync) |
1473 | { | |
1474 | sb->recovery_cp = mddev->recovery_cp; | |
1475 | sb->cp_events_hi = (mddev->events>>32); | |
1476 | sb->cp_events_lo = (u32)mddev->events; | |
1477 | if (mddev->recovery_cp == MaxSector) | |
1478 | sb->state = (1<< MD_SB_CLEAN); | |
1479 | } else | |
1480 | sb->recovery_cp = 0; | |
1481 | ||
1482 | sb->layout = mddev->layout; | |
9d8f0363 | 1483 | sb->chunk_size = mddev->chunk_sectors << 9; |
1da177e4 | 1484 | |
c3d9714e | 1485 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) |
a654b9d8 N |
1486 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); |
1487 | ||
1da177e4 | 1488 | sb->disks[0].state = (1<<MD_DISK_REMOVED); |
dafb20fa | 1489 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1490 | mdp_disk_t *d; |
86e6ffdd | 1491 | int desc_nr; |
0261cd9f N |
1492 | int is_active = test_bit(In_sync, &rdev2->flags); |
1493 | ||
1494 | if (rdev2->raid_disk >= 0 && | |
1495 | sb->minor_version >= 91) | |
1496 | /* we have nowhere to store the recovery_offset, | |
1497 | * but if it is not below the reshape_position, | |
1498 | * we can piggy-back on that. | |
1499 | */ | |
1500 | is_active = 1; | |
1501 | if (rdev2->raid_disk < 0 || | |
1502 | test_bit(Faulty, &rdev2->flags)) | |
1503 | is_active = 0; | |
1504 | if (is_active) | |
86e6ffdd | 1505 | desc_nr = rdev2->raid_disk; |
1da177e4 | 1506 | else |
86e6ffdd | 1507 | desc_nr = next_spare++; |
19133a42 | 1508 | rdev2->desc_nr = desc_nr; |
1da177e4 LT |
1509 | d = &sb->disks[rdev2->desc_nr]; |
1510 | nr_disks++; | |
1511 | d->number = rdev2->desc_nr; | |
1512 | d->major = MAJOR(rdev2->bdev->bd_dev); | |
1513 | d->minor = MINOR(rdev2->bdev->bd_dev); | |
0261cd9f | 1514 | if (is_active) |
1da177e4 LT |
1515 | d->raid_disk = rdev2->raid_disk; |
1516 | else | |
1517 | d->raid_disk = rdev2->desc_nr; /* compatibility */ | |
1be7892f | 1518 | if (test_bit(Faulty, &rdev2->flags)) |
1da177e4 | 1519 | d->state = (1<<MD_DISK_FAULTY); |
0261cd9f | 1520 | else if (is_active) { |
1da177e4 | 1521 | d->state = (1<<MD_DISK_ACTIVE); |
0261cd9f N |
1522 | if (test_bit(In_sync, &rdev2->flags)) |
1523 | d->state |= (1<<MD_DISK_SYNC); | |
1da177e4 LT |
1524 | active++; |
1525 | working++; | |
1526 | } else { | |
1527 | d->state = 0; | |
1528 | spare++; | |
1529 | working++; | |
1530 | } | |
8ddf9efe N |
1531 | if (test_bit(WriteMostly, &rdev2->flags)) |
1532 | d->state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
1533 | if (test_bit(FailFast, &rdev2->flags)) |
1534 | d->state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 | 1535 | } |
1da177e4 LT |
1536 | /* now set the "removed" and "faulty" bits on any missing devices */ |
1537 | for (i=0 ; i < mddev->raid_disks ; i++) { | |
1538 | mdp_disk_t *d = &sb->disks[i]; | |
1539 | if (d->state == 0 && d->number == 0) { | |
1540 | d->number = i; | |
1541 | d->raid_disk = i; | |
1542 | d->state = (1<<MD_DISK_REMOVED); | |
1543 | d->state |= (1<<MD_DISK_FAULTY); | |
1544 | failed++; | |
1545 | } | |
1546 | } | |
1547 | sb->nr_disks = nr_disks; | |
1548 | sb->active_disks = active; | |
1549 | sb->working_disks = working; | |
1550 | sb->failed_disks = failed; | |
1551 | sb->spare_disks = spare; | |
1552 | ||
1553 | sb->this_disk = sb->disks[rdev->desc_nr]; | |
1554 | sb->sb_csum = calc_sb_csum(sb); | |
1555 | } | |
1556 | ||
0cd17fec CW |
1557 | /* |
1558 | * rdev_size_change for 0.90.0 | |
1559 | */ | |
1560 | static unsigned long long | |
3cb03002 | 1561 | super_90_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec | 1562 | { |
58c0fed4 | 1563 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1564 | return 0; /* component must fit device */ |
c3d9714e | 1565 | if (rdev->mddev->bitmap_info.offset) |
0cd17fec | 1566 | return 0; /* can't move bitmap */ |
57b2caa3 | 1567 | rdev->sb_start = calc_dev_sboffset(rdev); |
15f4a5fd AN |
1568 | if (!num_sectors || num_sectors > rdev->sb_start) |
1569 | num_sectors = rdev->sb_start; | |
27a7b260 N |
1570 | /* Limit to 4TB as metadata cannot record more than that. |
1571 | * 4TB == 2^32 KB, or 2*2^32 sectors. | |
1572 | */ | |
72deb455 | 1573 | if ((u64)num_sectors >= (2ULL << 32) && rdev->mddev->level >= 1) |
3312c951 | 1574 | num_sectors = (sector_t)(2ULL << 32) - 2; |
46533ff7 N |
1575 | do { |
1576 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
0cd17fec | 1577 | rdev->sb_page); |
46533ff7 | 1578 | } while (md_super_wait(rdev->mddev) < 0); |
c26a44ed | 1579 | return num_sectors; |
0cd17fec CW |
1580 | } |
1581 | ||
c6563a8c N |
1582 | static int |
1583 | super_90_allow_new_offset(struct md_rdev *rdev, unsigned long long new_offset) | |
1584 | { | |
1585 | /* non-zero offset changes not possible with v0.90 */ | |
1586 | return new_offset == 0; | |
1587 | } | |
0cd17fec | 1588 | |
1da177e4 LT |
1589 | /* |
1590 | * version 1 superblock | |
1591 | */ | |
1592 | ||
f72ffdd6 | 1593 | static __le32 calc_sb_1_csum(struct mdp_superblock_1 *sb) |
1da177e4 | 1594 | { |
1c05b4bc N |
1595 | __le32 disk_csum; |
1596 | u32 csum; | |
1da177e4 LT |
1597 | unsigned long long newcsum; |
1598 | int size = 256 + le32_to_cpu(sb->max_dev)*2; | |
1c05b4bc | 1599 | __le32 *isuper = (__le32*)sb; |
1da177e4 LT |
1600 | |
1601 | disk_csum = sb->sb_csum; | |
1602 | sb->sb_csum = 0; | |
1603 | newcsum = 0; | |
1f3c9907 | 1604 | for (; size >= 4; size -= 4) |
1da177e4 LT |
1605 | newcsum += le32_to_cpu(*isuper++); |
1606 | ||
1607 | if (size == 2) | |
1c05b4bc | 1608 | newcsum += le16_to_cpu(*(__le16*) isuper); |
1da177e4 LT |
1609 | |
1610 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
1611 | sb->sb_csum = disk_csum; | |
1612 | return cpu_to_le32(csum); | |
1613 | } | |
1614 | ||
3cb03002 | 1615 | static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1616 | { |
1617 | struct mdp_superblock_1 *sb; | |
1618 | int ret; | |
0f420358 | 1619 | sector_t sb_start; |
c6563a8c | 1620 | sector_t sectors; |
1da177e4 | 1621 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; |
0002b271 | 1622 | int bmask; |
228fc7d7 | 1623 | bool spare_disk = true; |
1da177e4 LT |
1624 | |
1625 | /* | |
0f420358 | 1626 | * Calculate the position of the superblock in 512byte sectors. |
1da177e4 LT |
1627 | * It is always aligned to a 4K boundary and |
1628 | * depeding on minor_version, it can be: | |
1629 | * 0: At least 8K, but less than 12K, from end of device | |
1630 | * 1: At start of device | |
1631 | * 2: 4K from start of device. | |
1632 | */ | |
1633 | switch(minor_version) { | |
1634 | case 0: | |
77304d2a | 1635 | sb_start = i_size_read(rdev->bdev->bd_inode) >> 9; |
0f420358 AN |
1636 | sb_start -= 8*2; |
1637 | sb_start &= ~(sector_t)(4*2-1); | |
1da177e4 LT |
1638 | break; |
1639 | case 1: | |
0f420358 | 1640 | sb_start = 0; |
1da177e4 LT |
1641 | break; |
1642 | case 2: | |
0f420358 | 1643 | sb_start = 8; |
1da177e4 LT |
1644 | break; |
1645 | default: | |
1646 | return -EINVAL; | |
1647 | } | |
0f420358 | 1648 | rdev->sb_start = sb_start; |
1da177e4 | 1649 | |
0002b271 N |
1650 | /* superblock is rarely larger than 1K, but it can be larger, |
1651 | * and it is safe to read 4k, so we do that | |
1652 | */ | |
1653 | ret = read_disk_sb(rdev, 4096); | |
1da177e4 LT |
1654 | if (ret) return ret; |
1655 | ||
65a06f06 | 1656 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1657 | |
1658 | if (sb->magic != cpu_to_le32(MD_SB_MAGIC) || | |
1659 | sb->major_version != cpu_to_le32(1) || | |
1660 | le32_to_cpu(sb->max_dev) > (4096-256)/2 || | |
0f420358 | 1661 | le64_to_cpu(sb->super_offset) != rdev->sb_start || |
71c0805c | 1662 | (le32_to_cpu(sb->feature_map) & ~MD_FEATURE_ALL) != 0) |
1da177e4 LT |
1663 | return -EINVAL; |
1664 | ||
1665 | if (calc_sb_1_csum(sb) != sb->sb_csum) { | |
9d48739e | 1666 | pr_warn("md: invalid superblock checksum on %s\n", |
1da177e4 LT |
1667 | bdevname(rdev->bdev,b)); |
1668 | return -EINVAL; | |
1669 | } | |
1670 | if (le64_to_cpu(sb->data_size) < 10) { | |
9d48739e N |
1671 | pr_warn("md: data_size too small on %s\n", |
1672 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
1673 | return -EINVAL; |
1674 | } | |
c6563a8c N |
1675 | if (sb->pad0 || |
1676 | sb->pad3[0] || | |
1677 | memcmp(sb->pad3, sb->pad3+1, sizeof(sb->pad3) - sizeof(sb->pad3[1]))) | |
1678 | /* Some padding is non-zero, might be a new feature */ | |
1679 | return -EINVAL; | |
e11e93fa | 1680 | |
1da177e4 LT |
1681 | rdev->preferred_minor = 0xffff; |
1682 | rdev->data_offset = le64_to_cpu(sb->data_offset); | |
c6563a8c N |
1683 | rdev->new_data_offset = rdev->data_offset; |
1684 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE) && | |
1685 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) | |
1686 | rdev->new_data_offset += (s32)le32_to_cpu(sb->new_offset); | |
4dbcdc75 | 1687 | atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read)); |
1da177e4 | 1688 | |
0002b271 | 1689 | rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256; |
e1defc4f | 1690 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; |
0002b271 | 1691 | if (rdev->sb_size & bmask) |
a1801f85 N |
1692 | rdev->sb_size = (rdev->sb_size | bmask) + 1; |
1693 | ||
1694 | if (minor_version | |
0f420358 | 1695 | && rdev->data_offset < sb_start + (rdev->sb_size/512)) |
a1801f85 | 1696 | return -EINVAL; |
c6563a8c N |
1697 | if (minor_version |
1698 | && rdev->new_data_offset < sb_start + (rdev->sb_size/512)) | |
1699 | return -EINVAL; | |
0002b271 | 1700 | |
31b65a0d N |
1701 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH)) |
1702 | rdev->desc_nr = -1; | |
1703 | else | |
1704 | rdev->desc_nr = le32_to_cpu(sb->dev_number); | |
1705 | ||
2699b672 N |
1706 | if (!rdev->bb_page) { |
1707 | rdev->bb_page = alloc_page(GFP_KERNEL); | |
1708 | if (!rdev->bb_page) | |
1709 | return -ENOMEM; | |
1710 | } | |
1711 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BAD_BLOCKS) && | |
1712 | rdev->badblocks.count == 0) { | |
1713 | /* need to load the bad block list. | |
1714 | * Currently we limit it to one page. | |
1715 | */ | |
1716 | s32 offset; | |
1717 | sector_t bb_sector; | |
00485d09 | 1718 | __le64 *bbp; |
2699b672 N |
1719 | int i; |
1720 | int sectors = le16_to_cpu(sb->bblog_size); | |
1721 | if (sectors > (PAGE_SIZE / 512)) | |
1722 | return -EINVAL; | |
1723 | offset = le32_to_cpu(sb->bblog_offset); | |
1724 | if (offset == 0) | |
1725 | return -EINVAL; | |
1726 | bb_sector = (long long)offset; | |
1727 | if (!sync_page_io(rdev, bb_sector, sectors << 9, | |
796a5cf0 | 1728 | rdev->bb_page, REQ_OP_READ, 0, true)) |
2699b672 | 1729 | return -EIO; |
00485d09 | 1730 | bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
1731 | rdev->badblocks.shift = sb->bblog_shift; |
1732 | for (i = 0 ; i < (sectors << (9-3)) ; i++, bbp++) { | |
1733 | u64 bb = le64_to_cpu(*bbp); | |
1734 | int count = bb & (0x3ff); | |
1735 | u64 sector = bb >> 10; | |
1736 | sector <<= sb->bblog_shift; | |
1737 | count <<= sb->bblog_shift; | |
1738 | if (bb + 1 == 0) | |
1739 | break; | |
fc974ee2 | 1740 | if (badblocks_set(&rdev->badblocks, sector, count, 1)) |
2699b672 N |
1741 | return -EINVAL; |
1742 | } | |
486adf72 N |
1743 | } else if (sb->bblog_offset != 0) |
1744 | rdev->badblocks.shift = 0; | |
2699b672 | 1745 | |
ddc08823 PB |
1746 | if ((le32_to_cpu(sb->feature_map) & |
1747 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS))) { | |
ea0213e0 AP |
1748 | rdev->ppl.offset = (__s16)le16_to_cpu(sb->ppl.offset); |
1749 | rdev->ppl.size = le16_to_cpu(sb->ppl.size); | |
1750 | rdev->ppl.sector = rdev->sb_start + rdev->ppl.offset; | |
1751 | } | |
1752 | ||
33f2c35a N |
1753 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT) && |
1754 | sb->level != 0) | |
1755 | return -EINVAL; | |
1756 | ||
228fc7d7 YY |
1757 | /* not spare disk, or LEVEL_MULTIPATH */ |
1758 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH) || | |
1759 | (rdev->desc_nr >= 0 && | |
1760 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
1761 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || | |
1762 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL))) | |
1763 | spare_disk = false; | |
6a5cb53a | 1764 | |
9a7b2b0f | 1765 | if (!refdev) { |
228fc7d7 | 1766 | if (!spare_disk) |
6a5cb53a YY |
1767 | ret = 1; |
1768 | else | |
1769 | ret = 0; | |
9a7b2b0f | 1770 | } else { |
1da177e4 | 1771 | __u64 ev1, ev2; |
65a06f06 | 1772 | struct mdp_superblock_1 *refsb = page_address(refdev->sb_page); |
1da177e4 LT |
1773 | |
1774 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16) != 0 || | |
1775 | sb->level != refsb->level || | |
1776 | sb->layout != refsb->layout || | |
1777 | sb->chunksize != refsb->chunksize) { | |
9d48739e | 1778 | pr_warn("md: %s has strangely different superblock to %s\n", |
1da177e4 LT |
1779 | bdevname(rdev->bdev,b), |
1780 | bdevname(refdev->bdev,b2)); | |
1781 | return -EINVAL; | |
1782 | } | |
1783 | ev1 = le64_to_cpu(sb->events); | |
1784 | ev2 = le64_to_cpu(refsb->events); | |
1785 | ||
228fc7d7 | 1786 | if (!spare_disk && ev1 > ev2) |
8ed75463 N |
1787 | ret = 1; |
1788 | else | |
1789 | ret = 0; | |
1da177e4 | 1790 | } |
c6563a8c N |
1791 | if (minor_version) { |
1792 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9); | |
1793 | sectors -= rdev->data_offset; | |
1794 | } else | |
1795 | sectors = rdev->sb_start; | |
1796 | if (sectors < le64_to_cpu(sb->data_size)) | |
1da177e4 | 1797 | return -EINVAL; |
dd8ac336 | 1798 | rdev->sectors = le64_to_cpu(sb->data_size); |
8ed75463 | 1799 | return ret; |
1da177e4 LT |
1800 | } |
1801 | ||
fd01b88c | 1802 | static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 1803 | { |
65a06f06 | 1804 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
07d84d10 | 1805 | __u64 ev1 = le64_to_cpu(sb->events); |
1da177e4 | 1806 | |
41158c7e | 1807 | rdev->raid_disk = -1; |
c5d79adb N |
1808 | clear_bit(Faulty, &rdev->flags); |
1809 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1810 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1811 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1812 | |
1da177e4 LT |
1813 | if (mddev->raid_disks == 0) { |
1814 | mddev->major_version = 1; | |
1815 | mddev->patch_version = 0; | |
e691063a | 1816 | mddev->external = 0; |
9d8f0363 | 1817 | mddev->chunk_sectors = le32_to_cpu(sb->chunksize); |
9ebc6ef1 DD |
1818 | mddev->ctime = le64_to_cpu(sb->ctime); |
1819 | mddev->utime = le64_to_cpu(sb->utime); | |
1da177e4 | 1820 | mddev->level = le32_to_cpu(sb->level); |
d9d166c2 | 1821 | mddev->clevel[0] = 0; |
1da177e4 LT |
1822 | mddev->layout = le32_to_cpu(sb->layout); |
1823 | mddev->raid_disks = le32_to_cpu(sb->raid_disks); | |
58c0fed4 | 1824 | mddev->dev_sectors = le64_to_cpu(sb->size); |
07d84d10 | 1825 | mddev->events = ev1; |
c3d9714e | 1826 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1827 | mddev->bitmap_info.space = 0; |
1828 | /* Default location for bitmap is 1K after superblock | |
1829 | * using 3K - total of 4K | |
1830 | */ | |
c3d9714e | 1831 | mddev->bitmap_info.default_offset = 1024 >> 9; |
6409bb05 | 1832 | mddev->bitmap_info.default_space = (4096-1024) >> 9; |
2c810cdd N |
1833 | mddev->reshape_backwards = 0; |
1834 | ||
1da177e4 LT |
1835 | mddev->recovery_cp = le64_to_cpu(sb->resync_offset); |
1836 | memcpy(mddev->uuid, sb->set_uuid, 16); | |
1837 | ||
1838 | mddev->max_disks = (4096-256)/2; | |
a654b9d8 | 1839 | |
71c0805c | 1840 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) && |
6409bb05 | 1841 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1842 | mddev->bitmap_info.offset = |
1843 | (__s32)le32_to_cpu(sb->bitmap_offset); | |
6409bb05 N |
1844 | /* Metadata doesn't record how much space is available. |
1845 | * For 1.0, we assume we can use up to the superblock | |
1846 | * if before, else to 4K beyond superblock. | |
1847 | * For others, assume no change is possible. | |
1848 | */ | |
1849 | if (mddev->minor_version > 0) | |
1850 | mddev->bitmap_info.space = 0; | |
1851 | else if (mddev->bitmap_info.offset > 0) | |
1852 | mddev->bitmap_info.space = | |
1853 | 8 - mddev->bitmap_info.offset; | |
1854 | else | |
1855 | mddev->bitmap_info.space = | |
1856 | -mddev->bitmap_info.offset; | |
1857 | } | |
e11e93fa | 1858 | |
f6705578 N |
1859 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { |
1860 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); | |
1861 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); | |
1862 | mddev->new_level = le32_to_cpu(sb->new_level); | |
1863 | mddev->new_layout = le32_to_cpu(sb->new_layout); | |
664e7c41 | 1864 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_chunk); |
2c810cdd N |
1865 | if (mddev->delta_disks < 0 || |
1866 | (mddev->delta_disks == 0 && | |
1867 | (le32_to_cpu(sb->feature_map) | |
1868 | & MD_FEATURE_RESHAPE_BACKWARDS))) | |
1869 | mddev->reshape_backwards = 1; | |
f6705578 N |
1870 | } else { |
1871 | mddev->reshape_position = MaxSector; | |
1872 | mddev->delta_disks = 0; | |
1873 | mddev->new_level = mddev->level; | |
1874 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1875 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1876 | } |
1877 | ||
33f2c35a N |
1878 | if (mddev->level == 0 && |
1879 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT)) | |
1880 | mddev->layout = -1; | |
1881 | ||
486b0f7b | 1882 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL) |
a62ab49e | 1883 | set_bit(MD_HAS_JOURNAL, &mddev->flags); |
ea0213e0 | 1884 | |
ddc08823 PB |
1885 | if (le32_to_cpu(sb->feature_map) & |
1886 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS)) { | |
ea0213e0 AP |
1887 | if (le32_to_cpu(sb->feature_map) & |
1888 | (MD_FEATURE_BITMAP_OFFSET | MD_FEATURE_JOURNAL)) | |
1889 | return -EINVAL; | |
ddc08823 PB |
1890 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_PPL) && |
1891 | (le32_to_cpu(sb->feature_map) & | |
1892 | MD_FEATURE_MULTIPLE_PPLS)) | |
1893 | return -EINVAL; | |
ea0213e0 AP |
1894 | set_bit(MD_HAS_PPL, &mddev->flags); |
1895 | } | |
41158c7e | 1896 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1897 | /* Insist of good event counter while assembling, except for |
1898 | * spares (which don't need an event count) */ | |
1da177e4 | 1899 | ++ev1; |
be6800a7 N |
1900 | if (rdev->desc_nr >= 0 && |
1901 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
a3dfbdaa SL |
1902 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || |
1903 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL)) | |
be6800a7 N |
1904 | if (ev1 < mddev->events) |
1905 | return -EINVAL; | |
41158c7e N |
1906 | } else if (mddev->bitmap) { |
1907 | /* If adding to array with a bitmap, then we can accept an | |
1908 | * older device, but not too old. | |
1909 | */ | |
41158c7e N |
1910 | if (ev1 < mddev->bitmap->events_cleared) |
1911 | return 0; | |
8313b8e5 N |
1912 | if (ev1 < mddev->events) |
1913 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1914 | } else { |
1915 | if (ev1 < mddev->events) | |
1916 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1917 | return 0; | |
1918 | } | |
1da177e4 LT |
1919 | if (mddev->level != LEVEL_MULTIPATH) { |
1920 | int role; | |
3673f305 N |
1921 | if (rdev->desc_nr < 0 || |
1922 | rdev->desc_nr >= le32_to_cpu(sb->max_dev)) { | |
c4d4c91b | 1923 | role = MD_DISK_ROLE_SPARE; |
3673f305 N |
1924 | rdev->desc_nr = -1; |
1925 | } else | |
1926 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
1da177e4 | 1927 | switch(role) { |
c4d4c91b | 1928 | case MD_DISK_ROLE_SPARE: /* spare */ |
1da177e4 | 1929 | break; |
c4d4c91b | 1930 | case MD_DISK_ROLE_FAULTY: /* faulty */ |
b2d444d7 | 1931 | set_bit(Faulty, &rdev->flags); |
1da177e4 | 1932 | break; |
bac624f3 SL |
1933 | case MD_DISK_ROLE_JOURNAL: /* journal device */ |
1934 | if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL)) { | |
1935 | /* journal device without journal feature */ | |
9d48739e | 1936 | pr_warn("md: journal device provided without journal feature, ignoring the device\n"); |
bac624f3 SL |
1937 | return -EINVAL; |
1938 | } | |
1939 | set_bit(Journal, &rdev->flags); | |
3069aa8d | 1940 | rdev->journal_tail = le64_to_cpu(sb->journal_tail); |
9b15603d | 1941 | rdev->raid_disk = 0; |
bac624f3 | 1942 | break; |
1da177e4 | 1943 | default: |
f466722c | 1944 | rdev->saved_raid_disk = role; |
5fd6c1dc | 1945 | if ((le32_to_cpu(sb->feature_map) & |
f466722c | 1946 | MD_FEATURE_RECOVERY_OFFSET)) { |
5fd6c1dc | 1947 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); |
f466722c N |
1948 | if (!(le32_to_cpu(sb->feature_map) & |
1949 | MD_FEATURE_RECOVERY_BITMAP)) | |
1950 | rdev->saved_raid_disk = -1; | |
062f5b2a GJ |
1951 | } else { |
1952 | /* | |
1953 | * If the array is FROZEN, then the device can't | |
1954 | * be in_sync with rest of array. | |
1955 | */ | |
1956 | if (!test_bit(MD_RECOVERY_FROZEN, | |
1957 | &mddev->recovery)) | |
1958 | set_bit(In_sync, &rdev->flags); | |
1959 | } | |
1da177e4 LT |
1960 | rdev->raid_disk = role; |
1961 | break; | |
1962 | } | |
8ddf9efe N |
1963 | if (sb->devflags & WriteMostly1) |
1964 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1965 | if (sb->devflags & FailFast1) |
1966 | set_bit(FailFast, &rdev->flags); | |
2d78f8c4 N |
1967 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) |
1968 | set_bit(Replacement, &rdev->flags); | |
41158c7e | 1969 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1970 | set_bit(In_sync, &rdev->flags); |
41158c7e | 1971 | |
1da177e4 LT |
1972 | return 0; |
1973 | } | |
1974 | ||
fd01b88c | 1975 | static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1976 | { |
1977 | struct mdp_superblock_1 *sb; | |
3cb03002 | 1978 | struct md_rdev *rdev2; |
1da177e4 LT |
1979 | int max_dev, i; |
1980 | /* make rdev->sb match mddev and rdev data. */ | |
1981 | ||
65a06f06 | 1982 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1983 | |
1984 | sb->feature_map = 0; | |
1985 | sb->pad0 = 0; | |
5fd6c1dc | 1986 | sb->recovery_offset = cpu_to_le64(0); |
1da177e4 LT |
1987 | memset(sb->pad3, 0, sizeof(sb->pad3)); |
1988 | ||
1989 | sb->utime = cpu_to_le64((__u64)mddev->utime); | |
1990 | sb->events = cpu_to_le64(mddev->events); | |
1991 | if (mddev->in_sync) | |
1992 | sb->resync_offset = cpu_to_le64(mddev->recovery_cp); | |
bd18f646 SL |
1993 | else if (test_bit(MD_JOURNAL_CLEAN, &mddev->flags)) |
1994 | sb->resync_offset = cpu_to_le64(MaxSector); | |
1da177e4 LT |
1995 | else |
1996 | sb->resync_offset = cpu_to_le64(0); | |
1997 | ||
1c05b4bc | 1998 | sb->cnt_corrected_read = cpu_to_le32(atomic_read(&rdev->corrected_errors)); |
4dbcdc75 | 1999 | |
f0ca340c | 2000 | sb->raid_disks = cpu_to_le32(mddev->raid_disks); |
58c0fed4 | 2001 | sb->size = cpu_to_le64(mddev->dev_sectors); |
9d8f0363 | 2002 | sb->chunksize = cpu_to_le32(mddev->chunk_sectors); |
62e1e389 N |
2003 | sb->level = cpu_to_le32(mddev->level); |
2004 | sb->layout = cpu_to_le32(mddev->layout); | |
688834e6 N |
2005 | if (test_bit(FailFast, &rdev->flags)) |
2006 | sb->devflags |= FailFast1; | |
2007 | else | |
2008 | sb->devflags &= ~FailFast1; | |
f0ca340c | 2009 | |
aeb9b211 N |
2010 | if (test_bit(WriteMostly, &rdev->flags)) |
2011 | sb->devflags |= WriteMostly1; | |
2012 | else | |
2013 | sb->devflags &= ~WriteMostly1; | |
c6563a8c N |
2014 | sb->data_offset = cpu_to_le64(rdev->data_offset); |
2015 | sb->data_size = cpu_to_le64(rdev->sectors); | |
aeb9b211 | 2016 | |
c3d9714e N |
2017 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) { |
2018 | sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset); | |
71c0805c | 2019 | sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); |
a654b9d8 | 2020 | } |
5fd6c1dc | 2021 | |
f2076e7d | 2022 | if (rdev->raid_disk >= 0 && !test_bit(Journal, &rdev->flags) && |
97e4f42d | 2023 | !test_bit(In_sync, &rdev->flags)) { |
93be75ff N |
2024 | sb->feature_map |= |
2025 | cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET); | |
2026 | sb->recovery_offset = | |
2027 | cpu_to_le64(rdev->recovery_offset); | |
f466722c N |
2028 | if (rdev->saved_raid_disk >= 0 && mddev->bitmap) |
2029 | sb->feature_map |= | |
2030 | cpu_to_le32(MD_FEATURE_RECOVERY_BITMAP); | |
5fd6c1dc | 2031 | } |
3069aa8d SL |
2032 | /* Note: recovery_offset and journal_tail share space */ |
2033 | if (test_bit(Journal, &rdev->flags)) | |
2034 | sb->journal_tail = cpu_to_le64(rdev->journal_tail); | |
2d78f8c4 N |
2035 | if (test_bit(Replacement, &rdev->flags)) |
2036 | sb->feature_map |= | |
2037 | cpu_to_le32(MD_FEATURE_REPLACEMENT); | |
5fd6c1dc | 2038 | |
f6705578 N |
2039 | if (mddev->reshape_position != MaxSector) { |
2040 | sb->feature_map |= cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); | |
2041 | sb->reshape_position = cpu_to_le64(mddev->reshape_position); | |
2042 | sb->new_layout = cpu_to_le32(mddev->new_layout); | |
2043 | sb->delta_disks = cpu_to_le32(mddev->delta_disks); | |
2044 | sb->new_level = cpu_to_le32(mddev->new_level); | |
664e7c41 | 2045 | sb->new_chunk = cpu_to_le32(mddev->new_chunk_sectors); |
2c810cdd N |
2046 | if (mddev->delta_disks == 0 && |
2047 | mddev->reshape_backwards) | |
2048 | sb->feature_map | |
2049 | |= cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS); | |
c6563a8c N |
2050 | if (rdev->new_data_offset != rdev->data_offset) { |
2051 | sb->feature_map | |
2052 | |= cpu_to_le32(MD_FEATURE_NEW_OFFSET); | |
2053 | sb->new_offset = cpu_to_le32((__u32)(rdev->new_data_offset | |
2054 | - rdev->data_offset)); | |
2055 | } | |
f6705578 | 2056 | } |
a654b9d8 | 2057 | |
3c462c88 GR |
2058 | if (mddev_is_clustered(mddev)) |
2059 | sb->feature_map |= cpu_to_le32(MD_FEATURE_CLUSTERED); | |
2060 | ||
2699b672 N |
2061 | if (rdev->badblocks.count == 0) |
2062 | /* Nothing to do for bad blocks*/ ; | |
2063 | else if (sb->bblog_offset == 0) | |
2064 | /* Cannot record bad blocks on this device */ | |
2065 | md_error(mddev, rdev); | |
2066 | else { | |
2067 | struct badblocks *bb = &rdev->badblocks; | |
ae50640b | 2068 | __le64 *bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
2069 | u64 *p = bb->page; |
2070 | sb->feature_map |= cpu_to_le32(MD_FEATURE_BAD_BLOCKS); | |
2071 | if (bb->changed) { | |
2072 | unsigned seq; | |
2073 | ||
2074 | retry: | |
2075 | seq = read_seqbegin(&bb->lock); | |
2076 | ||
2077 | memset(bbp, 0xff, PAGE_SIZE); | |
2078 | ||
2079 | for (i = 0 ; i < bb->count ; i++) { | |
35f9ac2d | 2080 | u64 internal_bb = p[i]; |
2699b672 N |
2081 | u64 store_bb = ((BB_OFFSET(internal_bb) << 10) |
2082 | | BB_LEN(internal_bb)); | |
35f9ac2d | 2083 | bbp[i] = cpu_to_le64(store_bb); |
2699b672 | 2084 | } |
d0962936 | 2085 | bb->changed = 0; |
2699b672 N |
2086 | if (read_seqretry(&bb->lock, seq)) |
2087 | goto retry; | |
2088 | ||
2089 | bb->sector = (rdev->sb_start + | |
2090 | (int)le32_to_cpu(sb->bblog_offset)); | |
2091 | bb->size = le16_to_cpu(sb->bblog_size); | |
2699b672 N |
2092 | } |
2093 | } | |
2094 | ||
1da177e4 | 2095 | max_dev = 0; |
dafb20fa | 2096 | rdev_for_each(rdev2, mddev) |
1da177e4 LT |
2097 | if (rdev2->desc_nr+1 > max_dev) |
2098 | max_dev = rdev2->desc_nr+1; | |
a778b73f | 2099 | |
70471daf N |
2100 | if (max_dev > le32_to_cpu(sb->max_dev)) { |
2101 | int bmask; | |
a778b73f | 2102 | sb->max_dev = cpu_to_le32(max_dev); |
70471daf N |
2103 | rdev->sb_size = max_dev * 2 + 256; |
2104 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; | |
2105 | if (rdev->sb_size & bmask) | |
2106 | rdev->sb_size = (rdev->sb_size | bmask) + 1; | |
ddcf3522 N |
2107 | } else |
2108 | max_dev = le32_to_cpu(sb->max_dev); | |
2109 | ||
1da177e4 | 2110 | for (i=0; i<max_dev;i++) |
8df72024 | 2111 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
f72ffdd6 | 2112 | |
a97b7896 SL |
2113 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) |
2114 | sb->feature_map |= cpu_to_le32(MD_FEATURE_JOURNAL); | |
f72ffdd6 | 2115 | |
ea0213e0 | 2116 | if (test_bit(MD_HAS_PPL, &mddev->flags)) { |
ddc08823 PB |
2117 | if (test_bit(MD_HAS_MULTIPLE_PPLS, &mddev->flags)) |
2118 | sb->feature_map |= | |
2119 | cpu_to_le32(MD_FEATURE_MULTIPLE_PPLS); | |
2120 | else | |
2121 | sb->feature_map |= cpu_to_le32(MD_FEATURE_PPL); | |
ea0213e0 AP |
2122 | sb->ppl.offset = cpu_to_le16(rdev->ppl.offset); |
2123 | sb->ppl.size = cpu_to_le16(rdev->ppl.size); | |
2124 | } | |
2125 | ||
dafb20fa | 2126 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 2127 | i = rdev2->desc_nr; |
b2d444d7 | 2128 | if (test_bit(Faulty, &rdev2->flags)) |
c4d4c91b | 2129 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY); |
b2d444d7 | 2130 | else if (test_bit(In_sync, &rdev2->flags)) |
1da177e4 | 2131 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
a97b7896 | 2132 | else if (test_bit(Journal, &rdev2->flags)) |
bac624f3 | 2133 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_JOURNAL); |
93be75ff | 2134 | else if (rdev2->raid_disk >= 0) |
5fd6c1dc | 2135 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
1da177e4 | 2136 | else |
c4d4c91b | 2137 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
1da177e4 LT |
2138 | } |
2139 | ||
1da177e4 LT |
2140 | sb->sb_csum = calc_sb_1_csum(sb); |
2141 | } | |
2142 | ||
d9c0fa50 XN |
2143 | static sector_t super_1_choose_bm_space(sector_t dev_size) |
2144 | { | |
2145 | sector_t bm_space; | |
2146 | ||
2147 | /* if the device is bigger than 8Gig, save 64k for bitmap | |
2148 | * usage, if bigger than 200Gig, save 128k | |
2149 | */ | |
2150 | if (dev_size < 64*2) | |
2151 | bm_space = 0; | |
2152 | else if (dev_size - 64*2 >= 200*1024*1024*2) | |
2153 | bm_space = 128*2; | |
2154 | else if (dev_size - 4*2 > 8*1024*1024*2) | |
2155 | bm_space = 64*2; | |
2156 | else | |
2157 | bm_space = 4*2; | |
2158 | return bm_space; | |
2159 | } | |
2160 | ||
0cd17fec | 2161 | static unsigned long long |
3cb03002 | 2162 | super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec CW |
2163 | { |
2164 | struct mdp_superblock_1 *sb; | |
15f4a5fd | 2165 | sector_t max_sectors; |
58c0fed4 | 2166 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 2167 | return 0; /* component must fit device */ |
c6563a8c N |
2168 | if (rdev->data_offset != rdev->new_data_offset) |
2169 | return 0; /* too confusing */ | |
0f420358 | 2170 | if (rdev->sb_start < rdev->data_offset) { |
0cd17fec | 2171 | /* minor versions 1 and 2; superblock before data */ |
77304d2a | 2172 | max_sectors = i_size_read(rdev->bdev->bd_inode) >> 9; |
15f4a5fd AN |
2173 | max_sectors -= rdev->data_offset; |
2174 | if (!num_sectors || num_sectors > max_sectors) | |
2175 | num_sectors = max_sectors; | |
c3d9714e | 2176 | } else if (rdev->mddev->bitmap_info.offset) { |
0cd17fec CW |
2177 | /* minor version 0 with bitmap we can't move */ |
2178 | return 0; | |
2179 | } else { | |
2180 | /* minor version 0; superblock after data */ | |
d9c0fa50 XN |
2181 | sector_t sb_start, bm_space; |
2182 | sector_t dev_size = i_size_read(rdev->bdev->bd_inode) >> 9; | |
2183 | ||
2184 | /* 8K is for superblock */ | |
2185 | sb_start = dev_size - 8*2; | |
0f420358 | 2186 | sb_start &= ~(sector_t)(4*2 - 1); |
d9c0fa50 XN |
2187 | |
2188 | bm_space = super_1_choose_bm_space(dev_size); | |
2189 | ||
2190 | /* Space that can be used to store date needs to decrease | |
2191 | * superblock bitmap space and bad block space(4K) | |
2192 | */ | |
2193 | max_sectors = sb_start - bm_space - 4*2; | |
2194 | ||
15f4a5fd AN |
2195 | if (!num_sectors || num_sectors > max_sectors) |
2196 | num_sectors = max_sectors; | |
2445eeb1 | 2197 | rdev->sb_start = sb_start; |
0cd17fec | 2198 | } |
65a06f06 | 2199 | sb = page_address(rdev->sb_page); |
15f4a5fd | 2200 | sb->data_size = cpu_to_le64(num_sectors); |
3fb632e4 | 2201 | sb->super_offset = cpu_to_le64(rdev->sb_start); |
0cd17fec | 2202 | sb->sb_csum = calc_sb_1_csum(sb); |
46533ff7 N |
2203 | do { |
2204 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
2205 | rdev->sb_page); | |
2206 | } while (md_super_wait(rdev->mddev) < 0); | |
c26a44ed | 2207 | return num_sectors; |
c6563a8c N |
2208 | |
2209 | } | |
2210 | ||
2211 | static int | |
2212 | super_1_allow_new_offset(struct md_rdev *rdev, | |
2213 | unsigned long long new_offset) | |
2214 | { | |
2215 | /* All necessary checks on new >= old have been done */ | |
2216 | struct bitmap *bitmap; | |
2217 | if (new_offset >= rdev->data_offset) | |
2218 | return 1; | |
2219 | ||
2220 | /* with 1.0 metadata, there is no metadata to tread on | |
2221 | * so we can always move back */ | |
2222 | if (rdev->mddev->minor_version == 0) | |
2223 | return 1; | |
2224 | ||
2225 | /* otherwise we must be sure not to step on | |
2226 | * any metadata, so stay: | |
2227 | * 36K beyond start of superblock | |
2228 | * beyond end of badblocks | |
2229 | * beyond write-intent bitmap | |
2230 | */ | |
2231 | if (rdev->sb_start + (32+4)*2 > new_offset) | |
2232 | return 0; | |
2233 | bitmap = rdev->mddev->bitmap; | |
2234 | if (bitmap && !rdev->mddev->bitmap_info.file && | |
2235 | rdev->sb_start + rdev->mddev->bitmap_info.offset + | |
1ec885cd | 2236 | bitmap->storage.file_pages * (PAGE_SIZE>>9) > new_offset) |
c6563a8c N |
2237 | return 0; |
2238 | if (rdev->badblocks.sector + rdev->badblocks.size > new_offset) | |
2239 | return 0; | |
2240 | ||
2241 | return 1; | |
0cd17fec | 2242 | } |
1da177e4 | 2243 | |
75c96f85 | 2244 | static struct super_type super_types[] = { |
1da177e4 LT |
2245 | [0] = { |
2246 | .name = "0.90.0", | |
2247 | .owner = THIS_MODULE, | |
0cd17fec CW |
2248 | .load_super = super_90_load, |
2249 | .validate_super = super_90_validate, | |
2250 | .sync_super = super_90_sync, | |
2251 | .rdev_size_change = super_90_rdev_size_change, | |
c6563a8c | 2252 | .allow_new_offset = super_90_allow_new_offset, |
1da177e4 LT |
2253 | }, |
2254 | [1] = { | |
2255 | .name = "md-1", | |
2256 | .owner = THIS_MODULE, | |
0cd17fec CW |
2257 | .load_super = super_1_load, |
2258 | .validate_super = super_1_validate, | |
2259 | .sync_super = super_1_sync, | |
2260 | .rdev_size_change = super_1_rdev_size_change, | |
c6563a8c | 2261 | .allow_new_offset = super_1_allow_new_offset, |
1da177e4 LT |
2262 | }, |
2263 | }; | |
1da177e4 | 2264 | |
fd01b88c | 2265 | static void sync_super(struct mddev *mddev, struct md_rdev *rdev) |
076f968b JB |
2266 | { |
2267 | if (mddev->sync_super) { | |
2268 | mddev->sync_super(mddev, rdev); | |
2269 | return; | |
2270 | } | |
2271 | ||
2272 | BUG_ON(mddev->major_version >= ARRAY_SIZE(super_types)); | |
2273 | ||
2274 | super_types[mddev->major_version].sync_super(mddev, rdev); | |
2275 | } | |
2276 | ||
fd01b88c | 2277 | static int match_mddev_units(struct mddev *mddev1, struct mddev *mddev2) |
1da177e4 | 2278 | { |
3cb03002 | 2279 | struct md_rdev *rdev, *rdev2; |
1da177e4 | 2280 | |
4b80991c | 2281 | rcu_read_lock(); |
0b020e85 SL |
2282 | rdev_for_each_rcu(rdev, mddev1) { |
2283 | if (test_bit(Faulty, &rdev->flags) || | |
2284 | test_bit(Journal, &rdev->flags) || | |
2285 | rdev->raid_disk == -1) | |
2286 | continue; | |
2287 | rdev_for_each_rcu(rdev2, mddev2) { | |
2288 | if (test_bit(Faulty, &rdev2->flags) || | |
2289 | test_bit(Journal, &rdev2->flags) || | |
2290 | rdev2->raid_disk == -1) | |
2291 | continue; | |
61a27e1f | 2292 | if (rdev->bdev->bd_disk == rdev2->bdev->bd_disk) { |
4b80991c | 2293 | rcu_read_unlock(); |
7dd5e7c3 | 2294 | return 1; |
4b80991c | 2295 | } |
0b020e85 SL |
2296 | } |
2297 | } | |
4b80991c | 2298 | rcu_read_unlock(); |
1da177e4 LT |
2299 | return 0; |
2300 | } | |
2301 | ||
2302 | static LIST_HEAD(pending_raid_disks); | |
2303 | ||
ac5e7113 AN |
2304 | /* |
2305 | * Try to register data integrity profile for an mddev | |
2306 | * | |
2307 | * This is called when an array is started and after a disk has been kicked | |
2308 | * from the array. It only succeeds if all working and active component devices | |
2309 | * are integrity capable with matching profiles. | |
2310 | */ | |
fd01b88c | 2311 | int md_integrity_register(struct mddev *mddev) |
ac5e7113 | 2312 | { |
3cb03002 | 2313 | struct md_rdev *rdev, *reference = NULL; |
ac5e7113 AN |
2314 | |
2315 | if (list_empty(&mddev->disks)) | |
2316 | return 0; /* nothing to do */ | |
629acb6a JB |
2317 | if (!mddev->gendisk || blk_get_integrity(mddev->gendisk)) |
2318 | return 0; /* shouldn't register, or already is */ | |
dafb20fa | 2319 | rdev_for_each(rdev, mddev) { |
ac5e7113 AN |
2320 | /* skip spares and non-functional disks */ |
2321 | if (test_bit(Faulty, &rdev->flags)) | |
2322 | continue; | |
2323 | if (rdev->raid_disk < 0) | |
2324 | continue; | |
ac5e7113 AN |
2325 | if (!reference) { |
2326 | /* Use the first rdev as the reference */ | |
2327 | reference = rdev; | |
2328 | continue; | |
2329 | } | |
2330 | /* does this rdev's profile match the reference profile? */ | |
2331 | if (blk_integrity_compare(reference->bdev->bd_disk, | |
2332 | rdev->bdev->bd_disk) < 0) | |
2333 | return -EINVAL; | |
2334 | } | |
89078d57 MP |
2335 | if (!reference || !bdev_get_integrity(reference->bdev)) |
2336 | return 0; | |
ac5e7113 AN |
2337 | /* |
2338 | * All component devices are integrity capable and have matching | |
2339 | * profiles, register the common profile for the md device. | |
2340 | */ | |
25520d55 MP |
2341 | blk_integrity_register(mddev->gendisk, |
2342 | bdev_get_integrity(reference->bdev)); | |
2343 | ||
9d48739e | 2344 | pr_debug("md: data integrity enabled on %s\n", mdname(mddev)); |
10764815 | 2345 | if (bioset_integrity_create(&mddev->bio_set, BIO_POOL_SIZE) || |
daee2024 GJ |
2346 | (mddev->level != 1 && mddev->level != 10 && |
2347 | bioset_integrity_create(&mddev->io_acct_set, BIO_POOL_SIZE))) { | |
de3ea66e GJ |
2348 | /* |
2349 | * No need to handle the failure of bioset_integrity_create, | |
2350 | * because the function is called by md_run() -> pers->run(), | |
2351 | * md_run calls bioset_exit -> bioset_integrity_free in case | |
2352 | * of failure case. | |
2353 | */ | |
9d48739e | 2354 | pr_err("md: failed to create integrity pool for %s\n", |
a91a2785 MP |
2355 | mdname(mddev)); |
2356 | return -EINVAL; | |
2357 | } | |
ac5e7113 AN |
2358 | return 0; |
2359 | } | |
2360 | EXPORT_SYMBOL(md_integrity_register); | |
2361 | ||
1501efad DW |
2362 | /* |
2363 | * Attempt to add an rdev, but only if it is consistent with the current | |
2364 | * integrity profile | |
2365 | */ | |
2366 | int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev) | |
3f9d99c1 | 2367 | { |
2863b9eb | 2368 | struct blk_integrity *bi_mddev; |
1501efad | 2369 | char name[BDEVNAME_SIZE]; |
2863b9eb JB |
2370 | |
2371 | if (!mddev->gendisk) | |
1501efad | 2372 | return 0; |
2863b9eb | 2373 | |
2863b9eb | 2374 | bi_mddev = blk_get_integrity(mddev->gendisk); |
3f9d99c1 | 2375 | |
ac5e7113 | 2376 | if (!bi_mddev) /* nothing to do */ |
1501efad DW |
2377 | return 0; |
2378 | ||
2379 | if (blk_integrity_compare(mddev->gendisk, rdev->bdev->bd_disk) != 0) { | |
9d48739e N |
2380 | pr_err("%s: incompatible integrity profile for %s\n", |
2381 | mdname(mddev), bdevname(rdev->bdev, name)); | |
1501efad DW |
2382 | return -ENXIO; |
2383 | } | |
2384 | ||
2385 | return 0; | |
3f9d99c1 | 2386 | } |
ac5e7113 | 2387 | EXPORT_SYMBOL(md_integrity_add_rdev); |
3f9d99c1 | 2388 | |
d7a47838 CH |
2389 | static bool rdev_read_only(struct md_rdev *rdev) |
2390 | { | |
2391 | return bdev_read_only(rdev->bdev) || | |
2392 | (rdev->meta_bdev && bdev_read_only(rdev->meta_bdev)); | |
2393 | } | |
2394 | ||
f72ffdd6 | 2395 | static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) |
1da177e4 | 2396 | { |
7dd5e7c3 | 2397 | char b[BDEVNAME_SIZE]; |
5e55e2f5 | 2398 | int err; |
1da177e4 | 2399 | |
11e2ede0 DW |
2400 | /* prevent duplicates */ |
2401 | if (find_rdev(mddev, rdev->bdev->bd_dev)) | |
2402 | return -EEXIST; | |
2403 | ||
d7a47838 | 2404 | if (rdev_read_only(rdev) && mddev->pers) |
97b20ef7 N |
2405 | return -EROFS; |
2406 | ||
dd8ac336 | 2407 | /* make sure rdev->sectors exceeds mddev->dev_sectors */ |
f6b6ec5c SL |
2408 | if (!test_bit(Journal, &rdev->flags) && |
2409 | rdev->sectors && | |
2410 | (mddev->dev_sectors == 0 || rdev->sectors < mddev->dev_sectors)) { | |
a778b73f N |
2411 | if (mddev->pers) { |
2412 | /* Cannot change size, so fail | |
2413 | * If mddev->level <= 0, then we don't care | |
2414 | * about aligning sizes (e.g. linear) | |
2415 | */ | |
2416 | if (mddev->level > 0) | |
2417 | return -ENOSPC; | |
2418 | } else | |
dd8ac336 | 2419 | mddev->dev_sectors = rdev->sectors; |
2bf071bf | 2420 | } |
1da177e4 LT |
2421 | |
2422 | /* Verify rdev->desc_nr is unique. | |
2423 | * If it is -1, assign a free number, else | |
2424 | * check number is not in use | |
2425 | */ | |
4878e9eb | 2426 | rcu_read_lock(); |
1da177e4 LT |
2427 | if (rdev->desc_nr < 0) { |
2428 | int choice = 0; | |
4878e9eb N |
2429 | if (mddev->pers) |
2430 | choice = mddev->raid_disks; | |
57d051dc | 2431 | while (md_find_rdev_nr_rcu(mddev, choice)) |
1da177e4 LT |
2432 | choice++; |
2433 | rdev->desc_nr = choice; | |
2434 | } else { | |
57d051dc | 2435 | if (md_find_rdev_nr_rcu(mddev, rdev->desc_nr)) { |
4878e9eb | 2436 | rcu_read_unlock(); |
1da177e4 | 2437 | return -EBUSY; |
4878e9eb | 2438 | } |
1da177e4 | 2439 | } |
4878e9eb | 2440 | rcu_read_unlock(); |
f6b6ec5c SL |
2441 | if (!test_bit(Journal, &rdev->flags) && |
2442 | mddev->max_disks && rdev->desc_nr >= mddev->max_disks) { | |
9d48739e N |
2443 | pr_warn("md: %s: array is limited to %d devices\n", |
2444 | mdname(mddev), mddev->max_disks); | |
de01dfad N |
2445 | return -EBUSY; |
2446 | } | |
19133a42 | 2447 | bdevname(rdev->bdev,b); |
90a9befb | 2448 | strreplace(b, '/', '!'); |
649316b2 | 2449 | |
1da177e4 | 2450 | rdev->mddev = mddev; |
9d48739e | 2451 | pr_debug("md: bind<%s>\n", b); |
86e6ffdd | 2452 | |
963c555e | 2453 | if (mddev->raid_disks) |
404659cf | 2454 | mddev_create_serial_pool(mddev, rdev, false); |
963c555e | 2455 | |
b2d6db58 | 2456 | if ((err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b))) |
5e55e2f5 | 2457 | goto fail; |
86e6ffdd | 2458 | |
5e3b8a8d | 2459 | /* failure here is OK */ |
8d65269f | 2460 | err = sysfs_create_link(&rdev->kobj, bdev_kobj(rdev->bdev), "block"); |
00bcb4ac | 2461 | rdev->sysfs_state = sysfs_get_dirent_safe(rdev->kobj.sd, "state"); |
e1a86dbb JB |
2462 | rdev->sysfs_unack_badblocks = |
2463 | sysfs_get_dirent_safe(rdev->kobj.sd, "unacknowledged_bad_blocks"); | |
2464 | rdev->sysfs_badblocks = | |
2465 | sysfs_get_dirent_safe(rdev->kobj.sd, "bad_blocks"); | |
3c0ee63a | 2466 | |
4b80991c | 2467 | list_add_rcu(&rdev->same_set, &mddev->disks); |
e09b457b | 2468 | bd_link_disk_holder(rdev->bdev, mddev->gendisk); |
4044ba58 N |
2469 | |
2470 | /* May as well allow recovery to be retried once */ | |
5389042f | 2471 | mddev->recovery_disabled++; |
3f9d99c1 | 2472 | |
1da177e4 | 2473 | return 0; |
5e55e2f5 N |
2474 | |
2475 | fail: | |
9d48739e N |
2476 | pr_warn("md: failed to register dev-%s for %s\n", |
2477 | b, mdname(mddev)); | |
5e55e2f5 | 2478 | return err; |
1da177e4 LT |
2479 | } |
2480 | ||
cc1ffe61 | 2481 | static void rdev_delayed_delete(struct work_struct *ws) |
5792a285 | 2482 | { |
3cb03002 | 2483 | struct md_rdev *rdev = container_of(ws, struct md_rdev, del_work); |
5792a285 | 2484 | kobject_del(&rdev->kobj); |
177a99b2 | 2485 | kobject_put(&rdev->kobj); |
5792a285 N |
2486 | } |
2487 | ||
f72ffdd6 | 2488 | static void unbind_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2489 | { |
2490 | char b[BDEVNAME_SIZE]; | |
403df478 | 2491 | |
49731baa | 2492 | bd_unlink_disk_holder(rdev->bdev, rdev->mddev->gendisk); |
4b80991c | 2493 | list_del_rcu(&rdev->same_set); |
9d48739e | 2494 | pr_debug("md: unbind<%s>\n", bdevname(rdev->bdev,b)); |
11d3a9f6 | 2495 | mddev_destroy_serial_pool(rdev->mddev, rdev, false); |
1da177e4 | 2496 | rdev->mddev = NULL; |
86e6ffdd | 2497 | sysfs_remove_link(&rdev->kobj, "block"); |
3c0ee63a | 2498 | sysfs_put(rdev->sysfs_state); |
e1a86dbb JB |
2499 | sysfs_put(rdev->sysfs_unack_badblocks); |
2500 | sysfs_put(rdev->sysfs_badblocks); | |
3c0ee63a | 2501 | rdev->sysfs_state = NULL; |
e1a86dbb JB |
2502 | rdev->sysfs_unack_badblocks = NULL; |
2503 | rdev->sysfs_badblocks = NULL; | |
2230dfe4 | 2504 | rdev->badblocks.count = 0; |
5792a285 | 2505 | /* We need to delay this, otherwise we can deadlock when |
4b80991c N |
2506 | * writing to 'remove' to "dev/state". We also need |
2507 | * to delay it due to rcu usage. | |
5792a285 | 2508 | */ |
4b80991c | 2509 | synchronize_rcu(); |
cc1ffe61 | 2510 | INIT_WORK(&rdev->del_work, rdev_delayed_delete); |
177a99b2 | 2511 | kobject_get(&rdev->kobj); |
cc1ffe61 | 2512 | queue_work(md_rdev_misc_wq, &rdev->del_work); |
1da177e4 LT |
2513 | } |
2514 | ||
2515 | /* | |
2516 | * prevent the device from being mounted, repartitioned or | |
2517 | * otherwise reused by a RAID array (or any other kernel | |
2518 | * subsystem), by bd_claiming the device. | |
2519 | */ | |
3cb03002 | 2520 | static int lock_rdev(struct md_rdev *rdev, dev_t dev, int shared) |
1da177e4 LT |
2521 | { |
2522 | int err = 0; | |
2523 | struct block_device *bdev; | |
1da177e4 | 2524 | |
d4d77629 | 2525 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, |
3cb03002 | 2526 | shared ? (struct md_rdev *)lock_rdev : rdev); |
1da177e4 | 2527 | if (IS_ERR(bdev)) { |
ea3edd4d CH |
2528 | pr_warn("md: could not open device unknown-block(%u,%u).\n", |
2529 | MAJOR(dev), MINOR(dev)); | |
1da177e4 LT |
2530 | return PTR_ERR(bdev); |
2531 | } | |
1da177e4 LT |
2532 | rdev->bdev = bdev; |
2533 | return err; | |
2534 | } | |
2535 | ||
3cb03002 | 2536 | static void unlock_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2537 | { |
2538 | struct block_device *bdev = rdev->bdev; | |
2539 | rdev->bdev = NULL; | |
e525fd89 | 2540 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
1da177e4 LT |
2541 | } |
2542 | ||
2543 | void md_autodetect_dev(dev_t dev); | |
2544 | ||
f72ffdd6 | 2545 | static void export_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2546 | { |
2547 | char b[BDEVNAME_SIZE]; | |
403df478 | 2548 | |
9d48739e | 2549 | pr_debug("md: export_rdev(%s)\n", bdevname(rdev->bdev,b)); |
545c8795 | 2550 | md_rdev_clear(rdev); |
1da177e4 | 2551 | #ifndef MODULE |
d0fae18f N |
2552 | if (test_bit(AutoDetected, &rdev->flags)) |
2553 | md_autodetect_dev(rdev->bdev->bd_dev); | |
1da177e4 LT |
2554 | #endif |
2555 | unlock_rdev(rdev); | |
86e6ffdd | 2556 | kobject_put(&rdev->kobj); |
1da177e4 LT |
2557 | } |
2558 | ||
fb56dfef | 2559 | void md_kick_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2560 | { |
2561 | unbind_rdev_from_array(rdev); | |
2562 | export_rdev(rdev); | |
2563 | } | |
fb56dfef | 2564 | EXPORT_SYMBOL_GPL(md_kick_rdev_from_array); |
1da177e4 | 2565 | |
fd01b88c | 2566 | static void export_array(struct mddev *mddev) |
1da177e4 | 2567 | { |
0638bb0e | 2568 | struct md_rdev *rdev; |
1da177e4 | 2569 | |
0638bb0e N |
2570 | while (!list_empty(&mddev->disks)) { |
2571 | rdev = list_first_entry(&mddev->disks, struct md_rdev, | |
2572 | same_set); | |
fb56dfef | 2573 | md_kick_rdev_from_array(rdev); |
1da177e4 | 2574 | } |
1da177e4 LT |
2575 | mddev->raid_disks = 0; |
2576 | mddev->major_version = 0; | |
2577 | } | |
2578 | ||
6497709b N |
2579 | static bool set_in_sync(struct mddev *mddev) |
2580 | { | |
efa4b77b | 2581 | lockdep_assert_held(&mddev->lock); |
4ad23a97 N |
2582 | if (!mddev->in_sync) { |
2583 | mddev->sync_checkers++; | |
2584 | spin_unlock(&mddev->lock); | |
2585 | percpu_ref_switch_to_atomic_sync(&mddev->writes_pending); | |
2586 | spin_lock(&mddev->lock); | |
2587 | if (!mddev->in_sync && | |
2588 | percpu_ref_is_zero(&mddev->writes_pending)) { | |
6497709b | 2589 | mddev->in_sync = 1; |
4ad23a97 N |
2590 | /* |
2591 | * Ensure ->in_sync is visible before we clear | |
2592 | * ->sync_checkers. | |
2593 | */ | |
55cc39f3 | 2594 | smp_mb(); |
6497709b N |
2595 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2596 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
2597 | } | |
4ad23a97 N |
2598 | if (--mddev->sync_checkers == 0) |
2599 | percpu_ref_switch_to_percpu(&mddev->writes_pending); | |
6497709b N |
2600 | } |
2601 | if (mddev->safemode == 1) | |
2602 | mddev->safemode = 0; | |
2603 | return mddev->in_sync; | |
2604 | } | |
2605 | ||
f72ffdd6 | 2606 | static void sync_sbs(struct mddev *mddev, int nospares) |
1da177e4 | 2607 | { |
42543769 N |
2608 | /* Update each superblock (in-memory image), but |
2609 | * if we are allowed to, skip spares which already | |
2610 | * have the right event counter, or have one earlier | |
2611 | * (which would mean they aren't being marked as dirty | |
2612 | * with the rest of the array) | |
2613 | */ | |
3cb03002 | 2614 | struct md_rdev *rdev; |
dafb20fa | 2615 | rdev_for_each(rdev, mddev) { |
42543769 N |
2616 | if (rdev->sb_events == mddev->events || |
2617 | (nospares && | |
2618 | rdev->raid_disk < 0 && | |
42543769 N |
2619 | rdev->sb_events+1 == mddev->events)) { |
2620 | /* Don't update this superblock */ | |
2621 | rdev->sb_loaded = 2; | |
2622 | } else { | |
076f968b | 2623 | sync_super(mddev, rdev); |
42543769 N |
2624 | rdev->sb_loaded = 1; |
2625 | } | |
1da177e4 LT |
2626 | } |
2627 | } | |
2628 | ||
2aa82191 GR |
2629 | static bool does_sb_need_changing(struct mddev *mddev) |
2630 | { | |
b653e961 | 2631 | struct md_rdev *rdev = NULL, *iter; |
2aa82191 GR |
2632 | struct mdp_superblock_1 *sb; |
2633 | int role; | |
2634 | ||
2635 | /* Find a good rdev */ | |
b653e961 XT |
2636 | rdev_for_each(iter, mddev) |
2637 | if ((iter->raid_disk >= 0) && !test_bit(Faulty, &iter->flags)) { | |
2638 | rdev = iter; | |
2aa82191 | 2639 | break; |
b653e961 | 2640 | } |
2aa82191 GR |
2641 | |
2642 | /* No good device found. */ | |
2643 | if (!rdev) | |
2644 | return false; | |
2645 | ||
2646 | sb = page_address(rdev->sb_page); | |
2647 | /* Check if a device has become faulty or a spare become active */ | |
2648 | rdev_for_each(rdev, mddev) { | |
2649 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
2650 | /* Device activated? */ | |
2651 | if (role == 0xffff && rdev->raid_disk >=0 && | |
2652 | !test_bit(Faulty, &rdev->flags)) | |
2653 | return true; | |
2654 | /* Device turned faulty? */ | |
2655 | if (test_bit(Faulty, &rdev->flags) && (role < 0xfffd)) | |
2656 | return true; | |
2657 | } | |
2658 | ||
2659 | /* Check if any mddev parameters have changed */ | |
2660 | if ((mddev->dev_sectors != le64_to_cpu(sb->size)) || | |
2661 | (mddev->reshape_position != le64_to_cpu(sb->reshape_position)) || | |
13459213 | 2662 | (mddev->layout != le32_to_cpu(sb->layout)) || |
2aa82191 GR |
2663 | (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) || |
2664 | (mddev->chunk_sectors != le32_to_cpu(sb->chunksize))) | |
2665 | return true; | |
2666 | ||
2667 | return false; | |
2668 | } | |
2669 | ||
1aee41f6 | 2670 | void md_update_sb(struct mddev *mddev, int force_change) |
1da177e4 | 2671 | { |
3cb03002 | 2672 | struct md_rdev *rdev; |
06d91a5f | 2673 | int sync_req; |
42543769 | 2674 | int nospares = 0; |
2699b672 | 2675 | int any_badblocks_changed = 0; |
23b63f9f | 2676 | int ret = -1; |
1da177e4 | 2677 | |
d87f064f N |
2678 | if (mddev->ro) { |
2679 | if (force_change) | |
2953079c | 2680 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
d87f064f N |
2681 | return; |
2682 | } | |
2aa82191 | 2683 | |
2c97cf13 | 2684 | repeat: |
2aa82191 | 2685 | if (mddev_is_clustered(mddev)) { |
2953079c | 2686 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
2aa82191 | 2687 | force_change = 1; |
2953079c | 2688 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
85ad1d13 | 2689 | nospares = 1; |
23b63f9f | 2690 | ret = md_cluster_ops->metadata_update_start(mddev); |
2aa82191 GR |
2691 | /* Has someone else has updated the sb */ |
2692 | if (!does_sb_need_changing(mddev)) { | |
23b63f9f GJ |
2693 | if (ret == 0) |
2694 | md_cluster_ops->metadata_update_cancel(mddev); | |
2953079c SL |
2695 | bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2696 | BIT(MD_SB_CHANGE_DEVS) | | |
2697 | BIT(MD_SB_CHANGE_CLEAN)); | |
2aa82191 GR |
2698 | return; |
2699 | } | |
2700 | } | |
2c97cf13 | 2701 | |
db0505d3 N |
2702 | /* |
2703 | * First make sure individual recovery_offsets are correct | |
2704 | * curr_resync_completed can only be used during recovery. | |
2705 | * During reshape/resync it might use array-addresses rather | |
2706 | * that device addresses. | |
2707 | */ | |
dafb20fa | 2708 | rdev_for_each(rdev, mddev) { |
3a3a5ddb N |
2709 | if (rdev->raid_disk >= 0 && |
2710 | mddev->delta_disks >= 0 && | |
db0505d3 N |
2711 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
2712 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery) && | |
2713 | !test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
f2076e7d | 2714 | !test_bit(Journal, &rdev->flags) && |
3a3a5ddb N |
2715 | !test_bit(In_sync, &rdev->flags) && |
2716 | mddev->curr_resync_completed > rdev->recovery_offset) | |
2717 | rdev->recovery_offset = mddev->curr_resync_completed; | |
2718 | ||
f72ffdd6 | 2719 | } |
bd52b746 | 2720 | if (!mddev->persistent) { |
2953079c SL |
2721 | clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2722 | clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
de393cde | 2723 | if (!mddev->external) { |
2953079c | 2724 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
dafb20fa | 2725 | rdev_for_each(rdev, mddev) { |
de393cde | 2726 | if (rdev->badblocks.changed) { |
d0962936 | 2727 | rdev->badblocks.changed = 0; |
fc974ee2 | 2728 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2729 | md_error(mddev, rdev); |
2730 | } | |
2731 | clear_bit(Blocked, &rdev->flags); | |
2732 | clear_bit(BlockedBadBlocks, &rdev->flags); | |
2733 | wake_up(&rdev->blocked_wait); | |
2734 | } | |
2735 | } | |
3a3a5ddb N |
2736 | wake_up(&mddev->sb_wait); |
2737 | return; | |
2738 | } | |
2739 | ||
85572d7c | 2740 | spin_lock(&mddev->lock); |
84692195 | 2741 | |
9ebc6ef1 | 2742 | mddev->utime = ktime_get_real_seconds(); |
3a3a5ddb | 2743 | |
2953079c | 2744 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
850b2b42 | 2745 | force_change = 1; |
2953079c | 2746 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
850b2b42 N |
2747 | /* just a clean<-> dirty transition, possibly leave spares alone, |
2748 | * though if events isn't the right even/odd, we will have to do | |
2749 | * spares after all | |
2750 | */ | |
2751 | nospares = 1; | |
2752 | if (force_change) | |
2753 | nospares = 0; | |
2754 | if (mddev->degraded) | |
84692195 N |
2755 | /* If the array is degraded, then skipping spares is both |
2756 | * dangerous and fairly pointless. | |
2757 | * Dangerous because a device that was removed from the array | |
2758 | * might have a event_count that still looks up-to-date, | |
2759 | * so it can be re-added without a resync. | |
2760 | * Pointless because if there are any spares to skip, | |
2761 | * then a recovery will happen and soon that array won't | |
2762 | * be degraded any more and the spare can go back to sleep then. | |
2763 | */ | |
850b2b42 | 2764 | nospares = 0; |
84692195 | 2765 | |
06d91a5f | 2766 | sync_req = mddev->in_sync; |
42543769 N |
2767 | |
2768 | /* If this is just a dirty<->clean transition, and the array is clean | |
2769 | * and 'events' is odd, we can roll back to the previous clean state */ | |
850b2b42 | 2770 | if (nospares |
42543769 | 2771 | && (mddev->in_sync && mddev->recovery_cp == MaxSector) |
a8707c08 N |
2772 | && mddev->can_decrease_events |
2773 | && mddev->events != 1) { | |
42543769 | 2774 | mddev->events--; |
a8707c08 N |
2775 | mddev->can_decrease_events = 0; |
2776 | } else { | |
42543769 N |
2777 | /* otherwise we have to go forward and ... */ |
2778 | mddev->events ++; | |
a8707c08 | 2779 | mddev->can_decrease_events = nospares; |
42543769 | 2780 | } |
1da177e4 | 2781 | |
403df478 N |
2782 | /* |
2783 | * This 64-bit counter should never wrap. | |
2784 | * Either we are in around ~1 trillion A.C., assuming | |
2785 | * 1 reboot per second, or we have a bug... | |
2786 | */ | |
2787 | WARN_ON(mddev->events == 0); | |
2699b672 | 2788 | |
dafb20fa | 2789 | rdev_for_each(rdev, mddev) { |
2699b672 N |
2790 | if (rdev->badblocks.changed) |
2791 | any_badblocks_changed++; | |
de393cde N |
2792 | if (test_bit(Faulty, &rdev->flags)) |
2793 | set_bit(FaultRecorded, &rdev->flags); | |
2794 | } | |
2699b672 | 2795 | |
e691063a | 2796 | sync_sbs(mddev, nospares); |
85572d7c | 2797 | spin_unlock(&mddev->lock); |
1da177e4 | 2798 | |
36a4e1fe N |
2799 | pr_debug("md: updating %s RAID superblock on device (in sync %d)\n", |
2800 | mdname(mddev), mddev->in_sync); | |
1da177e4 | 2801 | |
504634f6 SL |
2802 | if (mddev->queue) |
2803 | blk_add_trace_msg(mddev->queue, "md md_update_sb"); | |
46533ff7 | 2804 | rewrite: |
e64e4018 | 2805 | md_bitmap_update_sb(mddev->bitmap); |
dafb20fa | 2806 | rdev_for_each(rdev, mddev) { |
1da177e4 | 2807 | char b[BDEVNAME_SIZE]; |
36a4e1fe | 2808 | |
42543769 N |
2809 | if (rdev->sb_loaded != 1) |
2810 | continue; /* no noise on spare devices */ | |
1da177e4 | 2811 | |
f466722c | 2812 | if (!test_bit(Faulty, &rdev->flags)) { |
7bfa19f2 | 2813 | md_super_write(mddev,rdev, |
0f420358 | 2814 | rdev->sb_start, rdev->sb_size, |
7bfa19f2 | 2815 | rdev->sb_page); |
36a4e1fe N |
2816 | pr_debug("md: (write) %s's sb offset: %llu\n", |
2817 | bdevname(rdev->bdev, b), | |
2818 | (unsigned long long)rdev->sb_start); | |
42543769 | 2819 | rdev->sb_events = mddev->events; |
2699b672 N |
2820 | if (rdev->badblocks.size) { |
2821 | md_super_write(mddev, rdev, | |
2822 | rdev->badblocks.sector, | |
2823 | rdev->badblocks.size << 9, | |
2824 | rdev->bb_page); | |
2825 | rdev->badblocks.size = 0; | |
2826 | } | |
7bfa19f2 | 2827 | |
f466722c | 2828 | } else |
36a4e1fe N |
2829 | pr_debug("md: %s (skipping faulty)\n", |
2830 | bdevname(rdev->bdev, b)); | |
d70ed2e4 | 2831 | |
7bfa19f2 | 2832 | if (mddev->level == LEVEL_MULTIPATH) |
1da177e4 LT |
2833 | /* only need to write one superblock... */ |
2834 | break; | |
2835 | } | |
46533ff7 N |
2836 | if (md_super_wait(mddev) < 0) |
2837 | goto rewrite; | |
2953079c | 2838 | /* if there was a failure, MD_SB_CHANGE_DEVS was set, and we re-write super */ |
7bfa19f2 | 2839 | |
2c97cf13 GJ |
2840 | if (mddev_is_clustered(mddev) && ret == 0) |
2841 | md_cluster_ops->metadata_update_finish(mddev); | |
2842 | ||
850b2b42 | 2843 | if (mddev->in_sync != sync_req || |
2953079c SL |
2844 | !bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2845 | BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_CLEAN))) | |
06d91a5f | 2846 | /* have to write it out again */ |
06d91a5f | 2847 | goto repeat; |
3d310eb7 | 2848 | wake_up(&mddev->sb_wait); |
acb180b0 | 2849 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
e1a86dbb | 2850 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
06d91a5f | 2851 | |
dafb20fa | 2852 | rdev_for_each(rdev, mddev) { |
de393cde N |
2853 | if (test_and_clear_bit(FaultRecorded, &rdev->flags)) |
2854 | clear_bit(Blocked, &rdev->flags); | |
2855 | ||
2856 | if (any_badblocks_changed) | |
fc974ee2 | 2857 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2858 | clear_bit(BlockedBadBlocks, &rdev->flags); |
2859 | wake_up(&rdev->blocked_wait); | |
2860 | } | |
1da177e4 | 2861 | } |
1aee41f6 | 2862 | EXPORT_SYMBOL(md_update_sb); |
1da177e4 | 2863 | |
a6da4ef8 GR |
2864 | static int add_bound_rdev(struct md_rdev *rdev) |
2865 | { | |
2866 | struct mddev *mddev = rdev->mddev; | |
2867 | int err = 0; | |
87d4d916 | 2868 | bool add_journal = test_bit(Journal, &rdev->flags); |
a6da4ef8 | 2869 | |
87d4d916 | 2870 | if (!mddev->pers->hot_remove_disk || add_journal) { |
a6da4ef8 GR |
2871 | /* If there is hot_add_disk but no hot_remove_disk |
2872 | * then added disks for geometry changes, | |
2873 | * and should be added immediately. | |
2874 | */ | |
2875 | super_types[mddev->major_version]. | |
2876 | validate_super(mddev, rdev); | |
87d4d916 SL |
2877 | if (add_journal) |
2878 | mddev_suspend(mddev); | |
a6da4ef8 | 2879 | err = mddev->pers->hot_add_disk(mddev, rdev); |
87d4d916 SL |
2880 | if (add_journal) |
2881 | mddev_resume(mddev); | |
a6da4ef8 | 2882 | if (err) { |
db767672 | 2883 | md_kick_rdev_from_array(rdev); |
a6da4ef8 GR |
2884 | return err; |
2885 | } | |
2886 | } | |
2887 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2888 | ||
2953079c | 2889 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a6da4ef8 GR |
2890 | if (mddev->degraded) |
2891 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
2892 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
2893 | md_new_event(mddev); | |
2894 | md_wakeup_thread(mddev->thread); | |
2895 | return 0; | |
2896 | } | |
1da177e4 | 2897 | |
7f6ce769 | 2898 | /* words written to sysfs files may, or may not, be \n terminated. |
bce74dac N |
2899 | * We want to accept with case. For this we use cmd_match. |
2900 | */ | |
2901 | static int cmd_match(const char *cmd, const char *str) | |
2902 | { | |
2903 | /* See if cmd, written into a sysfs file, matches | |
2904 | * str. They must either be the same, or cmd can | |
2905 | * have a trailing newline | |
2906 | */ | |
2907 | while (*cmd && *str && *cmd == *str) { | |
2908 | cmd++; | |
2909 | str++; | |
2910 | } | |
2911 | if (*cmd == '\n') | |
2912 | cmd++; | |
2913 | if (*str || *cmd) | |
2914 | return 0; | |
2915 | return 1; | |
2916 | } | |
2917 | ||
86e6ffdd N |
2918 | struct rdev_sysfs_entry { |
2919 | struct attribute attr; | |
3cb03002 N |
2920 | ssize_t (*show)(struct md_rdev *, char *); |
2921 | ssize_t (*store)(struct md_rdev *, const char *, size_t); | |
86e6ffdd N |
2922 | }; |
2923 | ||
2924 | static ssize_t | |
3cb03002 | 2925 | state_show(struct md_rdev *rdev, char *page) |
86e6ffdd | 2926 | { |
35b785f7 | 2927 | char *sep = ","; |
20a49ff6 | 2928 | size_t len = 0; |
6aa7de05 | 2929 | unsigned long flags = READ_ONCE(rdev->flags); |
86e6ffdd | 2930 | |
758bfc8a | 2931 | if (test_bit(Faulty, &flags) || |
dcbcb486 TM |
2932 | (!test_bit(ExternalBbl, &flags) && |
2933 | rdev->badblocks.unacked_exist)) | |
35b785f7 TM |
2934 | len += sprintf(page+len, "faulty%s", sep); |
2935 | if (test_bit(In_sync, &flags)) | |
2936 | len += sprintf(page+len, "in_sync%s", sep); | |
2937 | if (test_bit(Journal, &flags)) | |
2938 | len += sprintf(page+len, "journal%s", sep); | |
2939 | if (test_bit(WriteMostly, &flags)) | |
2940 | len += sprintf(page+len, "write_mostly%s", sep); | |
758bfc8a | 2941 | if (test_bit(Blocked, &flags) || |
52c64152 | 2942 | (rdev->badblocks.unacked_exist |
35b785f7 TM |
2943 | && !test_bit(Faulty, &flags))) |
2944 | len += sprintf(page+len, "blocked%s", sep); | |
758bfc8a | 2945 | if (!test_bit(Faulty, &flags) && |
f2076e7d | 2946 | !test_bit(Journal, &flags) && |
35b785f7 TM |
2947 | !test_bit(In_sync, &flags)) |
2948 | len += sprintf(page+len, "spare%s", sep); | |
2949 | if (test_bit(WriteErrorSeen, &flags)) | |
2950 | len += sprintf(page+len, "write_error%s", sep); | |
2951 | if (test_bit(WantReplacement, &flags)) | |
2952 | len += sprintf(page+len, "want_replacement%s", sep); | |
2953 | if (test_bit(Replacement, &flags)) | |
2954 | len += sprintf(page+len, "replacement%s", sep); | |
2955 | if (test_bit(ExternalBbl, &flags)) | |
2956 | len += sprintf(page+len, "external_bbl%s", sep); | |
688834e6 N |
2957 | if (test_bit(FailFast, &flags)) |
2958 | len += sprintf(page+len, "failfast%s", sep); | |
35b785f7 TM |
2959 | |
2960 | if (len) | |
2961 | len -= strlen(sep); | |
2d78f8c4 | 2962 | |
86e6ffdd N |
2963 | return len+sprintf(page+len, "\n"); |
2964 | } | |
2965 | ||
45dc2de1 | 2966 | static ssize_t |
3cb03002 | 2967 | state_store(struct md_rdev *rdev, const char *buf, size_t len) |
45dc2de1 N |
2968 | { |
2969 | /* can write | |
de393cde | 2970 | * faulty - simulates an error |
45dc2de1 | 2971 | * remove - disconnects the device |
f655675b N |
2972 | * writemostly - sets write_mostly |
2973 | * -writemostly - clears write_mostly | |
de393cde N |
2974 | * blocked - sets the Blocked flags |
2975 | * -blocked - clears the Blocked and possibly simulates an error | |
6d56e278 | 2976 | * insync - sets Insync providing device isn't active |
f466722c N |
2977 | * -insync - clear Insync for a device with a slot assigned, |
2978 | * so that it gets rebuilt based on bitmap | |
d7a9d443 N |
2979 | * write_error - sets WriteErrorSeen |
2980 | * -write_error - clears WriteErrorSeen | |
688834e6 | 2981 | * {,-}failfast - set/clear FailFast |
45dc2de1 | 2982 | */ |
8d8b0e94 XN |
2983 | |
2984 | struct mddev *mddev = rdev->mddev; | |
45dc2de1 | 2985 | int err = -EINVAL; |
8d8b0e94 XN |
2986 | bool need_update_sb = false; |
2987 | ||
45dc2de1 N |
2988 | if (cmd_match(buf, "faulty") && rdev->mddev->pers) { |
2989 | md_error(rdev->mddev, rdev); | |
5ef56c8f N |
2990 | if (test_bit(Faulty, &rdev->flags)) |
2991 | err = 0; | |
2992 | else | |
2993 | err = -EBUSY; | |
45dc2de1 | 2994 | } else if (cmd_match(buf, "remove")) { |
5d881783 SL |
2995 | if (rdev->mddev->pers) { |
2996 | clear_bit(Blocked, &rdev->flags); | |
2997 | remove_and_add_spares(rdev->mddev, rdev); | |
2998 | } | |
45dc2de1 N |
2999 | if (rdev->raid_disk >= 0) |
3000 | err = -EBUSY; | |
3001 | else { | |
45dc2de1 | 3002 | err = 0; |
a9720903 GJ |
3003 | if (mddev_is_clustered(mddev)) |
3004 | err = md_cluster_ops->remove_disk(mddev, rdev); | |
3005 | ||
3006 | if (err == 0) { | |
3007 | md_kick_rdev_from_array(rdev); | |
060b0689 | 3008 | if (mddev->pers) { |
2953079c | 3009 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
3010 | md_wakeup_thread(mddev->thread); |
3011 | } | |
a9720903 GJ |
3012 | md_new_event(mddev); |
3013 | } | |
45dc2de1 | 3014 | } |
f655675b N |
3015 | } else if (cmd_match(buf, "writemostly")) { |
3016 | set_bit(WriteMostly, &rdev->flags); | |
404659cf | 3017 | mddev_create_serial_pool(rdev->mddev, rdev, false); |
8d8b0e94 | 3018 | need_update_sb = true; |
f655675b N |
3019 | err = 0; |
3020 | } else if (cmd_match(buf, "-writemostly")) { | |
11d3a9f6 | 3021 | mddev_destroy_serial_pool(rdev->mddev, rdev, false); |
f655675b | 3022 | clear_bit(WriteMostly, &rdev->flags); |
8d8b0e94 | 3023 | need_update_sb = true; |
6bfe0b49 DW |
3024 | err = 0; |
3025 | } else if (cmd_match(buf, "blocked")) { | |
3026 | set_bit(Blocked, &rdev->flags); | |
3027 | err = 0; | |
3028 | } else if (cmd_match(buf, "-blocked")) { | |
de393cde | 3029 | if (!test_bit(Faulty, &rdev->flags) && |
dcbcb486 | 3030 | !test_bit(ExternalBbl, &rdev->flags) && |
7da64a0a | 3031 | rdev->badblocks.unacked_exist) { |
de393cde N |
3032 | /* metadata handler doesn't understand badblocks, |
3033 | * so we need to fail the device | |
3034 | */ | |
3035 | md_error(rdev->mddev, rdev); | |
3036 | } | |
6bfe0b49 | 3037 | clear_bit(Blocked, &rdev->flags); |
de393cde | 3038 | clear_bit(BlockedBadBlocks, &rdev->flags); |
6bfe0b49 DW |
3039 | wake_up(&rdev->blocked_wait); |
3040 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
3041 | md_wakeup_thread(rdev->mddev->thread); | |
3042 | ||
6d56e278 N |
3043 | err = 0; |
3044 | } else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) { | |
3045 | set_bit(In_sync, &rdev->flags); | |
f655675b | 3046 | err = 0; |
688834e6 N |
3047 | } else if (cmd_match(buf, "failfast")) { |
3048 | set_bit(FailFast, &rdev->flags); | |
8d8b0e94 | 3049 | need_update_sb = true; |
688834e6 N |
3050 | err = 0; |
3051 | } else if (cmd_match(buf, "-failfast")) { | |
3052 | clear_bit(FailFast, &rdev->flags); | |
8d8b0e94 | 3053 | need_update_sb = true; |
688834e6 | 3054 | err = 0; |
f2076e7d SL |
3055 | } else if (cmd_match(buf, "-insync") && rdev->raid_disk >= 0 && |
3056 | !test_bit(Journal, &rdev->flags)) { | |
e1960f8c N |
3057 | if (rdev->mddev->pers == NULL) { |
3058 | clear_bit(In_sync, &rdev->flags); | |
3059 | rdev->saved_raid_disk = rdev->raid_disk; | |
3060 | rdev->raid_disk = -1; | |
3061 | err = 0; | |
3062 | } | |
d7a9d443 N |
3063 | } else if (cmd_match(buf, "write_error")) { |
3064 | set_bit(WriteErrorSeen, &rdev->flags); | |
3065 | err = 0; | |
3066 | } else if (cmd_match(buf, "-write_error")) { | |
3067 | clear_bit(WriteErrorSeen, &rdev->flags); | |
3068 | err = 0; | |
2d78f8c4 N |
3069 | } else if (cmd_match(buf, "want_replacement")) { |
3070 | /* Any non-spare device that is not a replacement can | |
3071 | * become want_replacement at any time, but we then need to | |
3072 | * check if recovery is needed. | |
3073 | */ | |
3074 | if (rdev->raid_disk >= 0 && | |
f2076e7d | 3075 | !test_bit(Journal, &rdev->flags) && |
2d78f8c4 N |
3076 | !test_bit(Replacement, &rdev->flags)) |
3077 | set_bit(WantReplacement, &rdev->flags); | |
3078 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
3079 | md_wakeup_thread(rdev->mddev->thread); | |
3080 | err = 0; | |
3081 | } else if (cmd_match(buf, "-want_replacement")) { | |
3082 | /* Clearing 'want_replacement' is always allowed. | |
3083 | * Once replacements starts it is too late though. | |
3084 | */ | |
3085 | err = 0; | |
3086 | clear_bit(WantReplacement, &rdev->flags); | |
3087 | } else if (cmd_match(buf, "replacement")) { | |
3088 | /* Can only set a device as a replacement when array has not | |
3089 | * yet been started. Once running, replacement is automatic | |
3090 | * from spares, or by assigning 'slot'. | |
3091 | */ | |
3092 | if (rdev->mddev->pers) | |
3093 | err = -EBUSY; | |
3094 | else { | |
3095 | set_bit(Replacement, &rdev->flags); | |
3096 | err = 0; | |
3097 | } | |
3098 | } else if (cmd_match(buf, "-replacement")) { | |
3099 | /* Similarly, can only clear Replacement before start */ | |
3100 | if (rdev->mddev->pers) | |
3101 | err = -EBUSY; | |
3102 | else { | |
3103 | clear_bit(Replacement, &rdev->flags); | |
3104 | err = 0; | |
3105 | } | |
a6da4ef8 | 3106 | } else if (cmd_match(buf, "re-add")) { |
ee37e621 YY |
3107 | if (!rdev->mddev->pers) |
3108 | err = -EINVAL; | |
3109 | else if (test_bit(Faulty, &rdev->flags) && (rdev->raid_disk == -1) && | |
3110 | rdev->saved_raid_disk >= 0) { | |
97f6cd39 GR |
3111 | /* clear_bit is performed _after_ all the devices |
3112 | * have their local Faulty bit cleared. If any writes | |
3113 | * happen in the meantime in the local node, they | |
3114 | * will land in the local bitmap, which will be synced | |
3115 | * by this node eventually | |
3116 | */ | |
3117 | if (!mddev_is_clustered(rdev->mddev) || | |
3118 | (err = md_cluster_ops->gather_bitmaps(rdev)) == 0) { | |
3119 | clear_bit(Faulty, &rdev->flags); | |
3120 | err = add_bound_rdev(rdev); | |
3121 | } | |
a6da4ef8 GR |
3122 | } else |
3123 | err = -EBUSY; | |
35b785f7 TM |
3124 | } else if (cmd_match(buf, "external_bbl") && (rdev->mddev->external)) { |
3125 | set_bit(ExternalBbl, &rdev->flags); | |
3126 | rdev->badblocks.shift = 0; | |
3127 | err = 0; | |
3128 | } else if (cmd_match(buf, "-external_bbl") && (rdev->mddev->external)) { | |
3129 | clear_bit(ExternalBbl, &rdev->flags); | |
3130 | err = 0; | |
45dc2de1 | 3131 | } |
8d8b0e94 XN |
3132 | if (need_update_sb) |
3133 | md_update_sb(mddev, 1); | |
00bcb4ac N |
3134 | if (!err) |
3135 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
45dc2de1 N |
3136 | return err ? err : len; |
3137 | } | |
80ca3a44 | 3138 | static struct rdev_sysfs_entry rdev_state = |
750f199e | 3139 | __ATTR_PREALLOC(state, S_IRUGO|S_IWUSR, state_show, state_store); |
86e6ffdd | 3140 | |
4dbcdc75 | 3141 | static ssize_t |
3cb03002 | 3142 | errors_show(struct md_rdev *rdev, char *page) |
4dbcdc75 N |
3143 | { |
3144 | return sprintf(page, "%d\n", atomic_read(&rdev->corrected_errors)); | |
3145 | } | |
3146 | ||
3147 | static ssize_t | |
3cb03002 | 3148 | errors_store(struct md_rdev *rdev, const char *buf, size_t len) |
4dbcdc75 | 3149 | { |
4c9309c0 AD |
3150 | unsigned int n; |
3151 | int rv; | |
3152 | ||
3153 | rv = kstrtouint(buf, 10, &n); | |
3154 | if (rv < 0) | |
3155 | return rv; | |
3156 | atomic_set(&rdev->corrected_errors, n); | |
3157 | return len; | |
4dbcdc75 N |
3158 | } |
3159 | static struct rdev_sysfs_entry rdev_errors = | |
80ca3a44 | 3160 | __ATTR(errors, S_IRUGO|S_IWUSR, errors_show, errors_store); |
4dbcdc75 | 3161 | |
014236d2 | 3162 | static ssize_t |
3cb03002 | 3163 | slot_show(struct md_rdev *rdev, char *page) |
014236d2 | 3164 | { |
f2076e7d SL |
3165 | if (test_bit(Journal, &rdev->flags)) |
3166 | return sprintf(page, "journal\n"); | |
3167 | else if (rdev->raid_disk < 0) | |
014236d2 N |
3168 | return sprintf(page, "none\n"); |
3169 | else | |
3170 | return sprintf(page, "%d\n", rdev->raid_disk); | |
3171 | } | |
3172 | ||
3173 | static ssize_t | |
3cb03002 | 3174 | slot_store(struct md_rdev *rdev, const char *buf, size_t len) |
014236d2 | 3175 | { |
4c9309c0 | 3176 | int slot; |
c303da6d | 3177 | int err; |
4c9309c0 | 3178 | |
f2076e7d SL |
3179 | if (test_bit(Journal, &rdev->flags)) |
3180 | return -EBUSY; | |
014236d2 N |
3181 | if (strncmp(buf, "none", 4)==0) |
3182 | slot = -1; | |
4c9309c0 AD |
3183 | else { |
3184 | err = kstrtouint(buf, 10, (unsigned int *)&slot); | |
3185 | if (err < 0) | |
3186 | return err; | |
3187 | } | |
6c2fce2e | 3188 | if (rdev->mddev->pers && slot == -1) { |
c303da6d N |
3189 | /* Setting 'slot' on an active array requires also |
3190 | * updating the 'rd%d' link, and communicating | |
3191 | * with the personality with ->hot_*_disk. | |
3192 | * For now we only support removing | |
3193 | * failed/spare devices. This normally happens automatically, | |
3194 | * but not when the metadata is externally managed. | |
3195 | */ | |
c303da6d N |
3196 | if (rdev->raid_disk == -1) |
3197 | return -EEXIST; | |
3198 | /* personality does all needed checks */ | |
01393f3d | 3199 | if (rdev->mddev->pers->hot_remove_disk == NULL) |
c303da6d | 3200 | return -EINVAL; |
746d3207 N |
3201 | clear_bit(Blocked, &rdev->flags); |
3202 | remove_and_add_spares(rdev->mddev, rdev); | |
3203 | if (rdev->raid_disk >= 0) | |
3204 | return -EBUSY; | |
c303da6d N |
3205 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); |
3206 | md_wakeup_thread(rdev->mddev->thread); | |
6c2fce2e | 3207 | } else if (rdev->mddev->pers) { |
6c2fce2e | 3208 | /* Activating a spare .. or possibly reactivating |
6d56e278 | 3209 | * if we ever get bitmaps working here. |
6c2fce2e | 3210 | */ |
cb01c549 | 3211 | int err; |
6c2fce2e NB |
3212 | |
3213 | if (rdev->raid_disk != -1) | |
3214 | return -EBUSY; | |
3215 | ||
c6751b2b N |
3216 | if (test_bit(MD_RECOVERY_RUNNING, &rdev->mddev->recovery)) |
3217 | return -EBUSY; | |
3218 | ||
6c2fce2e NB |
3219 | if (rdev->mddev->pers->hot_add_disk == NULL) |
3220 | return -EINVAL; | |
3221 | ||
ba1b41b6 N |
3222 | if (slot >= rdev->mddev->raid_disks && |
3223 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
3224 | return -ENOSPC; | |
3225 | ||
6c2fce2e NB |
3226 | rdev->raid_disk = slot; |
3227 | if (test_bit(In_sync, &rdev->flags)) | |
3228 | rdev->saved_raid_disk = slot; | |
3229 | else | |
3230 | rdev->saved_raid_disk = -1; | |
d30519fc | 3231 | clear_bit(In_sync, &rdev->flags); |
8313b8e5 | 3232 | clear_bit(Bitmap_sync, &rdev->flags); |
3f79cc22 | 3233 | err = rdev->mddev->pers->hot_add_disk(rdev->mddev, rdev); |
cb01c549 GR |
3234 | if (err) { |
3235 | rdev->raid_disk = -1; | |
3236 | return err; | |
3237 | } else | |
3238 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
5e3b8a8d DLM |
3239 | /* failure here is OK */; |
3240 | sysfs_link_rdev(rdev->mddev, rdev); | |
6c2fce2e | 3241 | /* don't wakeup anyone, leave that to userspace. */ |
c303da6d | 3242 | } else { |
ba1b41b6 N |
3243 | if (slot >= rdev->mddev->raid_disks && |
3244 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
c303da6d N |
3245 | return -ENOSPC; |
3246 | rdev->raid_disk = slot; | |
3247 | /* assume it is working */ | |
c5d79adb N |
3248 | clear_bit(Faulty, &rdev->flags); |
3249 | clear_bit(WriteMostly, &rdev->flags); | |
c303da6d | 3250 | set_bit(In_sync, &rdev->flags); |
00bcb4ac | 3251 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
c303da6d | 3252 | } |
014236d2 N |
3253 | return len; |
3254 | } | |
3255 | ||
014236d2 | 3256 | static struct rdev_sysfs_entry rdev_slot = |
80ca3a44 | 3257 | __ATTR(slot, S_IRUGO|S_IWUSR, slot_show, slot_store); |
014236d2 | 3258 | |
93c8cad0 | 3259 | static ssize_t |
3cb03002 | 3260 | offset_show(struct md_rdev *rdev, char *page) |
93c8cad0 | 3261 | { |
6961ece4 | 3262 | return sprintf(page, "%llu\n", (unsigned long long)rdev->data_offset); |
93c8cad0 N |
3263 | } |
3264 | ||
3265 | static ssize_t | |
3cb03002 | 3266 | offset_store(struct md_rdev *rdev, const char *buf, size_t len) |
93c8cad0 | 3267 | { |
c6563a8c | 3268 | unsigned long long offset; |
b29bebd6 | 3269 | if (kstrtoull(buf, 10, &offset) < 0) |
93c8cad0 | 3270 | return -EINVAL; |
8ed0a521 | 3271 | if (rdev->mddev->pers && rdev->raid_disk >= 0) |
93c8cad0 | 3272 | return -EBUSY; |
dd8ac336 | 3273 | if (rdev->sectors && rdev->mddev->external) |
c5d79adb N |
3274 | /* Must set offset before size, so overlap checks |
3275 | * can be sane */ | |
3276 | return -EBUSY; | |
93c8cad0 | 3277 | rdev->data_offset = offset; |
25f7fd47 | 3278 | rdev->new_data_offset = offset; |
93c8cad0 N |
3279 | return len; |
3280 | } | |
3281 | ||
3282 | static struct rdev_sysfs_entry rdev_offset = | |
80ca3a44 | 3283 | __ATTR(offset, S_IRUGO|S_IWUSR, offset_show, offset_store); |
93c8cad0 | 3284 | |
c6563a8c N |
3285 | static ssize_t new_offset_show(struct md_rdev *rdev, char *page) |
3286 | { | |
3287 | return sprintf(page, "%llu\n", | |
3288 | (unsigned long long)rdev->new_data_offset); | |
3289 | } | |
3290 | ||
3291 | static ssize_t new_offset_store(struct md_rdev *rdev, | |
3292 | const char *buf, size_t len) | |
3293 | { | |
3294 | unsigned long long new_offset; | |
3295 | struct mddev *mddev = rdev->mddev; | |
3296 | ||
b29bebd6 | 3297 | if (kstrtoull(buf, 10, &new_offset) < 0) |
c6563a8c N |
3298 | return -EINVAL; |
3299 | ||
f851b60d N |
3300 | if (mddev->sync_thread || |
3301 | test_bit(MD_RECOVERY_RUNNING,&mddev->recovery)) | |
c6563a8c N |
3302 | return -EBUSY; |
3303 | if (new_offset == rdev->data_offset) | |
3304 | /* reset is always permitted */ | |
3305 | ; | |
3306 | else if (new_offset > rdev->data_offset) { | |
3307 | /* must not push array size beyond rdev_sectors */ | |
3308 | if (new_offset - rdev->data_offset | |
3309 | + mddev->dev_sectors > rdev->sectors) | |
3310 | return -E2BIG; | |
3311 | } | |
3312 | /* Metadata worries about other space details. */ | |
3313 | ||
3314 | /* decreasing the offset is inconsistent with a backwards | |
3315 | * reshape. | |
3316 | */ | |
3317 | if (new_offset < rdev->data_offset && | |
3318 | mddev->reshape_backwards) | |
3319 | return -EINVAL; | |
3320 | /* Increasing offset is inconsistent with forwards | |
3321 | * reshape. reshape_direction should be set to | |
3322 | * 'backwards' first. | |
3323 | */ | |
3324 | if (new_offset > rdev->data_offset && | |
3325 | !mddev->reshape_backwards) | |
3326 | return -EINVAL; | |
3327 | ||
3328 | if (mddev->pers && mddev->persistent && | |
3329 | !super_types[mddev->major_version] | |
3330 | .allow_new_offset(rdev, new_offset)) | |
3331 | return -E2BIG; | |
3332 | rdev->new_data_offset = new_offset; | |
3333 | if (new_offset > rdev->data_offset) | |
3334 | mddev->reshape_backwards = 1; | |
3335 | else if (new_offset < rdev->data_offset) | |
3336 | mddev->reshape_backwards = 0; | |
3337 | ||
3338 | return len; | |
3339 | } | |
3340 | static struct rdev_sysfs_entry rdev_new_offset = | |
3341 | __ATTR(new_offset, S_IRUGO|S_IWUSR, new_offset_show, new_offset_store); | |
3342 | ||
83303b61 | 3343 | static ssize_t |
3cb03002 | 3344 | rdev_size_show(struct md_rdev *rdev, char *page) |
83303b61 | 3345 | { |
dd8ac336 | 3346 | return sprintf(page, "%llu\n", (unsigned long long)rdev->sectors / 2); |
83303b61 N |
3347 | } |
3348 | ||
c5d79adb N |
3349 | static int overlaps(sector_t s1, sector_t l1, sector_t s2, sector_t l2) |
3350 | { | |
3351 | /* check if two start/length pairs overlap */ | |
3352 | if (s1+l1 <= s2) | |
3353 | return 0; | |
3354 | if (s2+l2 <= s1) | |
3355 | return 0; | |
3356 | return 1; | |
3357 | } | |
3358 | ||
b522adcd DW |
3359 | static int strict_blocks_to_sectors(const char *buf, sector_t *sectors) |
3360 | { | |
3361 | unsigned long long blocks; | |
3362 | sector_t new; | |
3363 | ||
b29bebd6 | 3364 | if (kstrtoull(buf, 10, &blocks) < 0) |
b522adcd DW |
3365 | return -EINVAL; |
3366 | ||
3367 | if (blocks & 1ULL << (8 * sizeof(blocks) - 1)) | |
3368 | return -EINVAL; /* sector conversion overflow */ | |
3369 | ||
3370 | new = blocks * 2; | |
3371 | if (new != blocks * 2) | |
3372 | return -EINVAL; /* unsigned long long to sector_t overflow */ | |
3373 | ||
3374 | *sectors = new; | |
3375 | return 0; | |
3376 | } | |
3377 | ||
83303b61 | 3378 | static ssize_t |
3cb03002 | 3379 | rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len) |
83303b61 | 3380 | { |
fd01b88c | 3381 | struct mddev *my_mddev = rdev->mddev; |
dd8ac336 | 3382 | sector_t oldsectors = rdev->sectors; |
b522adcd | 3383 | sector_t sectors; |
27c529bb | 3384 | |
f2076e7d SL |
3385 | if (test_bit(Journal, &rdev->flags)) |
3386 | return -EBUSY; | |
b522adcd | 3387 | if (strict_blocks_to_sectors(buf, §ors) < 0) |
d7027458 | 3388 | return -EINVAL; |
c6563a8c N |
3389 | if (rdev->data_offset != rdev->new_data_offset) |
3390 | return -EINVAL; /* too confusing */ | |
0cd17fec | 3391 | if (my_mddev->pers && rdev->raid_disk >= 0) { |
d7027458 | 3392 | if (my_mddev->persistent) { |
dd8ac336 AN |
3393 | sectors = super_types[my_mddev->major_version]. |
3394 | rdev_size_change(rdev, sectors); | |
3395 | if (!sectors) | |
0cd17fec | 3396 | return -EBUSY; |
dd8ac336 | 3397 | } else if (!sectors) |
77304d2a | 3398 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9) - |
dd8ac336 | 3399 | rdev->data_offset; |
a6468539 N |
3400 | if (!my_mddev->pers->resize) |
3401 | /* Cannot change size for RAID0 or Linear etc */ | |
3402 | return -EINVAL; | |
0cd17fec | 3403 | } |
dd8ac336 | 3404 | if (sectors < my_mddev->dev_sectors) |
7d3c6f87 | 3405 | return -EINVAL; /* component must fit device */ |
0cd17fec | 3406 | |
dd8ac336 AN |
3407 | rdev->sectors = sectors; |
3408 | if (sectors > oldsectors && my_mddev->external) { | |
8b1afc3d N |
3409 | /* Need to check that all other rdevs with the same |
3410 | * ->bdev do not overlap. 'rcu' is sufficient to walk | |
3411 | * the rdev lists safely. | |
3412 | * This check does not provide a hard guarantee, it | |
3413 | * just helps avoid dangerous mistakes. | |
c5d79adb | 3414 | */ |
fd01b88c | 3415 | struct mddev *mddev; |
c5d79adb | 3416 | int overlap = 0; |
159ec1fc | 3417 | struct list_head *tmp; |
c5d79adb | 3418 | |
8b1afc3d | 3419 | rcu_read_lock(); |
29ac4aa3 | 3420 | for_each_mddev(mddev, tmp) { |
3cb03002 | 3421 | struct md_rdev *rdev2; |
c5d79adb | 3422 | |
dafb20fa | 3423 | rdev_for_each(rdev2, mddev) |
f21e9ff7 N |
3424 | if (rdev->bdev == rdev2->bdev && |
3425 | rdev != rdev2 && | |
3426 | overlaps(rdev->data_offset, rdev->sectors, | |
3427 | rdev2->data_offset, | |
3428 | rdev2->sectors)) { | |
c5d79adb N |
3429 | overlap = 1; |
3430 | break; | |
3431 | } | |
c5d79adb N |
3432 | if (overlap) { |
3433 | mddev_put(mddev); | |
3434 | break; | |
3435 | } | |
3436 | } | |
8b1afc3d | 3437 | rcu_read_unlock(); |
c5d79adb N |
3438 | if (overlap) { |
3439 | /* Someone else could have slipped in a size | |
3440 | * change here, but doing so is just silly. | |
dd8ac336 | 3441 | * We put oldsectors back because we *know* it is |
c5d79adb N |
3442 | * safe, and trust userspace not to race with |
3443 | * itself | |
3444 | */ | |
dd8ac336 | 3445 | rdev->sectors = oldsectors; |
c5d79adb N |
3446 | return -EBUSY; |
3447 | } | |
3448 | } | |
83303b61 N |
3449 | return len; |
3450 | } | |
3451 | ||
3452 | static struct rdev_sysfs_entry rdev_size = | |
80ca3a44 | 3453 | __ATTR(size, S_IRUGO|S_IWUSR, rdev_size_show, rdev_size_store); |
83303b61 | 3454 | |
3cb03002 | 3455 | static ssize_t recovery_start_show(struct md_rdev *rdev, char *page) |
06e3c817 DW |
3456 | { |
3457 | unsigned long long recovery_start = rdev->recovery_offset; | |
3458 | ||
3459 | if (test_bit(In_sync, &rdev->flags) || | |
3460 | recovery_start == MaxSector) | |
3461 | return sprintf(page, "none\n"); | |
3462 | ||
3463 | return sprintf(page, "%llu\n", recovery_start); | |
3464 | } | |
3465 | ||
3cb03002 | 3466 | static ssize_t recovery_start_store(struct md_rdev *rdev, const char *buf, size_t len) |
06e3c817 DW |
3467 | { |
3468 | unsigned long long recovery_start; | |
3469 | ||
3470 | if (cmd_match(buf, "none")) | |
3471 | recovery_start = MaxSector; | |
b29bebd6 | 3472 | else if (kstrtoull(buf, 10, &recovery_start)) |
06e3c817 DW |
3473 | return -EINVAL; |
3474 | ||
3475 | if (rdev->mddev->pers && | |
3476 | rdev->raid_disk >= 0) | |
3477 | return -EBUSY; | |
3478 | ||
3479 | rdev->recovery_offset = recovery_start; | |
3480 | if (recovery_start == MaxSector) | |
3481 | set_bit(In_sync, &rdev->flags); | |
3482 | else | |
3483 | clear_bit(In_sync, &rdev->flags); | |
3484 | return len; | |
3485 | } | |
3486 | ||
3487 | static struct rdev_sysfs_entry rdev_recovery_start = | |
3488 | __ATTR(recovery_start, S_IRUGO|S_IWUSR, recovery_start_show, recovery_start_store); | |
3489 | ||
fc974ee2 VV |
3490 | /* sysfs access to bad-blocks list. |
3491 | * We present two files. | |
3492 | * 'bad-blocks' lists sector numbers and lengths of ranges that | |
3493 | * are recorded as bad. The list is truncated to fit within | |
3494 | * the one-page limit of sysfs. | |
3495 | * Writing "sector length" to this file adds an acknowledged | |
3496 | * bad block list. | |
3497 | * 'unacknowledged-bad-blocks' lists bad blocks that have not yet | |
3498 | * been acknowledged. Writing to this file adds bad blocks | |
3499 | * without acknowledging them. This is largely for testing. | |
3500 | */ | |
3cb03002 | 3501 | static ssize_t bb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3502 | { |
3503 | return badblocks_show(&rdev->badblocks, page, 0); | |
3504 | } | |
3cb03002 | 3505 | static ssize_t bb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 | 3506 | { |
de393cde N |
3507 | int rv = badblocks_store(&rdev->badblocks, page, len, 0); |
3508 | /* Maybe that ack was all we needed */ | |
3509 | if (test_and_clear_bit(BlockedBadBlocks, &rdev->flags)) | |
3510 | wake_up(&rdev->blocked_wait); | |
3511 | return rv; | |
16c791a5 N |
3512 | } |
3513 | static struct rdev_sysfs_entry rdev_bad_blocks = | |
3514 | __ATTR(bad_blocks, S_IRUGO|S_IWUSR, bb_show, bb_store); | |
3515 | ||
3cb03002 | 3516 | static ssize_t ubb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3517 | { |
3518 | return badblocks_show(&rdev->badblocks, page, 1); | |
3519 | } | |
3cb03002 | 3520 | static ssize_t ubb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 N |
3521 | { |
3522 | return badblocks_store(&rdev->badblocks, page, len, 1); | |
3523 | } | |
3524 | static struct rdev_sysfs_entry rdev_unack_bad_blocks = | |
3525 | __ATTR(unacknowledged_bad_blocks, S_IRUGO|S_IWUSR, ubb_show, ubb_store); | |
3526 | ||
664aed04 AP |
3527 | static ssize_t |
3528 | ppl_sector_show(struct md_rdev *rdev, char *page) | |
3529 | { | |
3530 | return sprintf(page, "%llu\n", (unsigned long long)rdev->ppl.sector); | |
3531 | } | |
3532 | ||
3533 | static ssize_t | |
3534 | ppl_sector_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3535 | { | |
3536 | unsigned long long sector; | |
3537 | ||
3538 | if (kstrtoull(buf, 10, §or) < 0) | |
3539 | return -EINVAL; | |
3540 | if (sector != (sector_t)sector) | |
3541 | return -EINVAL; | |
3542 | ||
3543 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3544 | rdev->raid_disk >= 0) | |
3545 | return -EBUSY; | |
3546 | ||
3547 | if (rdev->mddev->persistent) { | |
3548 | if (rdev->mddev->major_version == 0) | |
3549 | return -EINVAL; | |
3550 | if ((sector > rdev->sb_start && | |
3551 | sector - rdev->sb_start > S16_MAX) || | |
3552 | (sector < rdev->sb_start && | |
3553 | rdev->sb_start - sector > -S16_MIN)) | |
3554 | return -EINVAL; | |
3555 | rdev->ppl.offset = sector - rdev->sb_start; | |
3556 | } else if (!rdev->mddev->external) { | |
3557 | return -EBUSY; | |
3558 | } | |
3559 | rdev->ppl.sector = sector; | |
3560 | return len; | |
3561 | } | |
3562 | ||
3563 | static struct rdev_sysfs_entry rdev_ppl_sector = | |
3564 | __ATTR(ppl_sector, S_IRUGO|S_IWUSR, ppl_sector_show, ppl_sector_store); | |
3565 | ||
3566 | static ssize_t | |
3567 | ppl_size_show(struct md_rdev *rdev, char *page) | |
3568 | { | |
3569 | return sprintf(page, "%u\n", rdev->ppl.size); | |
3570 | } | |
3571 | ||
3572 | static ssize_t | |
3573 | ppl_size_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3574 | { | |
3575 | unsigned int size; | |
3576 | ||
3577 | if (kstrtouint(buf, 10, &size) < 0) | |
3578 | return -EINVAL; | |
3579 | ||
3580 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3581 | rdev->raid_disk >= 0) | |
3582 | return -EBUSY; | |
3583 | ||
3584 | if (rdev->mddev->persistent) { | |
3585 | if (rdev->mddev->major_version == 0) | |
3586 | return -EINVAL; | |
3587 | if (size > U16_MAX) | |
3588 | return -EINVAL; | |
3589 | } else if (!rdev->mddev->external) { | |
3590 | return -EBUSY; | |
3591 | } | |
3592 | rdev->ppl.size = size; | |
3593 | return len; | |
3594 | } | |
3595 | ||
3596 | static struct rdev_sysfs_entry rdev_ppl_size = | |
3597 | __ATTR(ppl_size, S_IRUGO|S_IWUSR, ppl_size_show, ppl_size_store); | |
3598 | ||
86e6ffdd N |
3599 | static struct attribute *rdev_default_attrs[] = { |
3600 | &rdev_state.attr, | |
4dbcdc75 | 3601 | &rdev_errors.attr, |
014236d2 | 3602 | &rdev_slot.attr, |
93c8cad0 | 3603 | &rdev_offset.attr, |
c6563a8c | 3604 | &rdev_new_offset.attr, |
83303b61 | 3605 | &rdev_size.attr, |
06e3c817 | 3606 | &rdev_recovery_start.attr, |
16c791a5 N |
3607 | &rdev_bad_blocks.attr, |
3608 | &rdev_unack_bad_blocks.attr, | |
664aed04 AP |
3609 | &rdev_ppl_sector.attr, |
3610 | &rdev_ppl_size.attr, | |
86e6ffdd N |
3611 | NULL, |
3612 | }; | |
3613 | static ssize_t | |
3614 | rdev_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
3615 | { | |
3616 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3617 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
86e6ffdd N |
3618 | |
3619 | if (!entry->show) | |
3620 | return -EIO; | |
758bfc8a | 3621 | if (!rdev->mddev) |
168b305b | 3622 | return -ENODEV; |
758bfc8a | 3623 | return entry->show(rdev, page); |
86e6ffdd N |
3624 | } |
3625 | ||
3626 | static ssize_t | |
3627 | rdev_attr_store(struct kobject *kobj, struct attribute *attr, | |
3628 | const char *page, size_t length) | |
3629 | { | |
3630 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3631 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
27c529bb | 3632 | ssize_t rv; |
fd01b88c | 3633 | struct mddev *mddev = rdev->mddev; |
86e6ffdd N |
3634 | |
3635 | if (!entry->store) | |
3636 | return -EIO; | |
67463acb N |
3637 | if (!capable(CAP_SYS_ADMIN)) |
3638 | return -EACCES; | |
c42d3240 | 3639 | rv = mddev ? mddev_lock(mddev) : -ENODEV; |
ca388059 | 3640 | if (!rv) { |
27c529bb | 3641 | if (rdev->mddev == NULL) |
c42d3240 | 3642 | rv = -ENODEV; |
27c529bb N |
3643 | else |
3644 | rv = entry->store(rdev, page, length); | |
6a51830e | 3645 | mddev_unlock(mddev); |
ca388059 N |
3646 | } |
3647 | return rv; | |
86e6ffdd N |
3648 | } |
3649 | ||
3650 | static void rdev_free(struct kobject *ko) | |
3651 | { | |
3cb03002 | 3652 | struct md_rdev *rdev = container_of(ko, struct md_rdev, kobj); |
86e6ffdd N |
3653 | kfree(rdev); |
3654 | } | |
52cf25d0 | 3655 | static const struct sysfs_ops rdev_sysfs_ops = { |
86e6ffdd N |
3656 | .show = rdev_attr_show, |
3657 | .store = rdev_attr_store, | |
3658 | }; | |
3659 | static struct kobj_type rdev_ktype = { | |
3660 | .release = rdev_free, | |
3661 | .sysfs_ops = &rdev_sysfs_ops, | |
3662 | .default_attrs = rdev_default_attrs, | |
3663 | }; | |
3664 | ||
3cb03002 | 3665 | int md_rdev_init(struct md_rdev *rdev) |
e8bb9a83 N |
3666 | { |
3667 | rdev->desc_nr = -1; | |
3668 | rdev->saved_raid_disk = -1; | |
3669 | rdev->raid_disk = -1; | |
3670 | rdev->flags = 0; | |
3671 | rdev->data_offset = 0; | |
c6563a8c | 3672 | rdev->new_data_offset = 0; |
e8bb9a83 | 3673 | rdev->sb_events = 0; |
0e3ef49e | 3674 | rdev->last_read_error = 0; |
2699b672 N |
3675 | rdev->sb_loaded = 0; |
3676 | rdev->bb_page = NULL; | |
e8bb9a83 N |
3677 | atomic_set(&rdev->nr_pending, 0); |
3678 | atomic_set(&rdev->read_errors, 0); | |
3679 | atomic_set(&rdev->corrected_errors, 0); | |
3680 | ||
3681 | INIT_LIST_HEAD(&rdev->same_set); | |
3682 | init_waitqueue_head(&rdev->blocked_wait); | |
2230dfe4 N |
3683 | |
3684 | /* Add space to store bad block list. | |
3685 | * This reserves the space even on arrays where it cannot | |
3686 | * be used - I wonder if that matters | |
3687 | */ | |
fc974ee2 | 3688 | return badblocks_init(&rdev->badblocks, 0); |
e8bb9a83 N |
3689 | } |
3690 | EXPORT_SYMBOL_GPL(md_rdev_init); | |
1da177e4 LT |
3691 | /* |
3692 | * Import a device. If 'super_format' >= 0, then sanity check the superblock | |
3693 | * | |
3694 | * mark the device faulty if: | |
3695 | * | |
3696 | * - the device is nonexistent (zero size) | |
3697 | * - the device has no valid superblock | |
3698 | * | |
3699 | * a faulty rdev _never_ has rdev->sb set. | |
3700 | */ | |
3cb03002 | 3701 | static struct md_rdev *md_import_device(dev_t newdev, int super_format, int super_minor) |
1da177e4 LT |
3702 | { |
3703 | char b[BDEVNAME_SIZE]; | |
3704 | int err; | |
3cb03002 | 3705 | struct md_rdev *rdev; |
1da177e4 LT |
3706 | sector_t size; |
3707 | ||
9ffae0cf | 3708 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
9d48739e | 3709 | if (!rdev) |
1da177e4 | 3710 | return ERR_PTR(-ENOMEM); |
1da177e4 | 3711 | |
2230dfe4 N |
3712 | err = md_rdev_init(rdev); |
3713 | if (err) | |
3714 | goto abort_free; | |
3715 | err = alloc_disk_sb(rdev); | |
3716 | if (err) | |
1da177e4 LT |
3717 | goto abort_free; |
3718 | ||
c5d79adb | 3719 | err = lock_rdev(rdev, newdev, super_format == -2); |
1da177e4 LT |
3720 | if (err) |
3721 | goto abort_free; | |
3722 | ||
f9cb074b | 3723 | kobject_init(&rdev->kobj, &rdev_ktype); |
86e6ffdd | 3724 | |
77304d2a | 3725 | size = i_size_read(rdev->bdev->bd_inode) >> BLOCK_SIZE_BITS; |
1da177e4 | 3726 | if (!size) { |
9d48739e | 3727 | pr_warn("md: %s has zero or unknown size, marking faulty!\n", |
1da177e4 LT |
3728 | bdevname(rdev->bdev,b)); |
3729 | err = -EINVAL; | |
3730 | goto abort_free; | |
3731 | } | |
3732 | ||
3733 | if (super_format >= 0) { | |
3734 | err = super_types[super_format]. | |
3735 | load_super(rdev, NULL, super_minor); | |
3736 | if (err == -EINVAL) { | |
9d48739e | 3737 | pr_warn("md: %s does not have a valid v%d.%d superblock, not importing!\n", |
df968c4e | 3738 | bdevname(rdev->bdev,b), |
9d48739e | 3739 | super_format, super_minor); |
1da177e4 LT |
3740 | goto abort_free; |
3741 | } | |
3742 | if (err < 0) { | |
9d48739e | 3743 | pr_warn("md: could not read %s's sb, not importing!\n", |
1da177e4 LT |
3744 | bdevname(rdev->bdev,b)); |
3745 | goto abort_free; | |
3746 | } | |
3747 | } | |
6bfe0b49 | 3748 | |
1da177e4 LT |
3749 | return rdev; |
3750 | ||
3751 | abort_free: | |
2699b672 N |
3752 | if (rdev->bdev) |
3753 | unlock_rdev(rdev); | |
545c8795 | 3754 | md_rdev_clear(rdev); |
1da177e4 LT |
3755 | kfree(rdev); |
3756 | return ERR_PTR(err); | |
3757 | } | |
3758 | ||
3759 | /* | |
3760 | * Check a full RAID array for plausibility | |
3761 | */ | |
3762 | ||
6a5cb53a | 3763 | static int analyze_sbs(struct mddev *mddev) |
1da177e4 LT |
3764 | { |
3765 | int i; | |
3cb03002 | 3766 | struct md_rdev *rdev, *freshest, *tmp; |
1da177e4 LT |
3767 | char b[BDEVNAME_SIZE]; |
3768 | ||
3769 | freshest = NULL; | |
dafb20fa | 3770 | rdev_for_each_safe(rdev, tmp, mddev) |
1da177e4 LT |
3771 | switch (super_types[mddev->major_version]. |
3772 | load_super(rdev, freshest, mddev->minor_version)) { | |
3773 | case 1: | |
3774 | freshest = rdev; | |
3775 | break; | |
3776 | case 0: | |
3777 | break; | |
3778 | default: | |
9d48739e | 3779 | pr_warn("md: fatal superblock inconsistency in %s -- removing from array\n", |
1da177e4 | 3780 | bdevname(rdev->bdev,b)); |
fb56dfef | 3781 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3782 | } |
3783 | ||
6a5cb53a YY |
3784 | /* Cannot find a valid fresh disk */ |
3785 | if (!freshest) { | |
3786 | pr_warn("md: cannot find a valid disk\n"); | |
3787 | return -EINVAL; | |
3788 | } | |
3789 | ||
1da177e4 LT |
3790 | super_types[mddev->major_version]. |
3791 | validate_super(mddev, freshest); | |
3792 | ||
3793 | i = 0; | |
dafb20fa | 3794 | rdev_for_each_safe(rdev, tmp, mddev) { |
233fca36 N |
3795 | if (mddev->max_disks && |
3796 | (rdev->desc_nr >= mddev->max_disks || | |
3797 | i > mddev->max_disks)) { | |
9d48739e N |
3798 | pr_warn("md: %s: %s: only %d devices permitted\n", |
3799 | mdname(mddev), bdevname(rdev->bdev, b), | |
3800 | mddev->max_disks); | |
fb56dfef | 3801 | md_kick_rdev_from_array(rdev); |
de01dfad N |
3802 | continue; |
3803 | } | |
1aee41f6 | 3804 | if (rdev != freshest) { |
1da177e4 LT |
3805 | if (super_types[mddev->major_version]. |
3806 | validate_super(mddev, rdev)) { | |
9d48739e | 3807 | pr_warn("md: kicking non-fresh %s from array!\n", |
1da177e4 | 3808 | bdevname(rdev->bdev,b)); |
fb56dfef | 3809 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3810 | continue; |
3811 | } | |
1aee41f6 | 3812 | } |
1da177e4 LT |
3813 | if (mddev->level == LEVEL_MULTIPATH) { |
3814 | rdev->desc_nr = i++; | |
3815 | rdev->raid_disk = rdev->desc_nr; | |
b2d444d7 | 3816 | set_bit(In_sync, &rdev->flags); |
f2076e7d SL |
3817 | } else if (rdev->raid_disk >= |
3818 | (mddev->raid_disks - min(0, mddev->delta_disks)) && | |
3819 | !test_bit(Journal, &rdev->flags)) { | |
a778b73f N |
3820 | rdev->raid_disk = -1; |
3821 | clear_bit(In_sync, &rdev->flags); | |
1da177e4 LT |
3822 | } |
3823 | } | |
6a5cb53a YY |
3824 | |
3825 | return 0; | |
1da177e4 LT |
3826 | } |
3827 | ||
72e02075 N |
3828 | /* Read a fixed-point number. |
3829 | * Numbers in sysfs attributes should be in "standard" units where | |
3830 | * possible, so time should be in seconds. | |
f72ffdd6 | 3831 | * However we internally use a a much smaller unit such as |
72e02075 N |
3832 | * milliseconds or jiffies. |
3833 | * This function takes a decimal number with a possible fractional | |
3834 | * component, and produces an integer which is the result of | |
3835 | * multiplying that number by 10^'scale'. | |
3836 | * all without any floating-point arithmetic. | |
3837 | */ | |
3838 | int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale) | |
3839 | { | |
3840 | unsigned long result = 0; | |
3841 | long decimals = -1; | |
3842 | while (isdigit(*cp) || (*cp == '.' && decimals < 0)) { | |
3843 | if (*cp == '.') | |
3844 | decimals = 0; | |
3845 | else if (decimals < scale) { | |
3846 | unsigned int value; | |
3847 | value = *cp - '0'; | |
3848 | result = result * 10 + value; | |
3849 | if (decimals >= 0) | |
3850 | decimals++; | |
3851 | } | |
3852 | cp++; | |
3853 | } | |
3854 | if (*cp == '\n') | |
3855 | cp++; | |
3856 | if (*cp) | |
3857 | return -EINVAL; | |
3858 | if (decimals < 0) | |
3859 | decimals = 0; | |
cf891607 | 3860 | *res = result * int_pow(10, scale - decimals); |
72e02075 N |
3861 | return 0; |
3862 | } | |
3863 | ||
16f17b39 | 3864 | static ssize_t |
fd01b88c | 3865 | safe_delay_show(struct mddev *mddev, char *page) |
16f17b39 N |
3866 | { |
3867 | int msec = (mddev->safemode_delay*1000)/HZ; | |
3868 | return sprintf(page, "%d.%03d\n", msec/1000, msec%1000); | |
3869 | } | |
3870 | static ssize_t | |
fd01b88c | 3871 | safe_delay_store(struct mddev *mddev, const char *cbuf, size_t len) |
16f17b39 | 3872 | { |
16f17b39 | 3873 | unsigned long msec; |
97ce0a7f | 3874 | |
28c1b9fd | 3875 | if (mddev_is_clustered(mddev)) { |
9d48739e | 3876 | pr_warn("md: Safemode is disabled for clustered mode\n"); |
28c1b9fd GR |
3877 | return -EINVAL; |
3878 | } | |
3879 | ||
72e02075 | 3880 | if (strict_strtoul_scaled(cbuf, &msec, 3) < 0) |
16f17b39 | 3881 | return -EINVAL; |
16f17b39 N |
3882 | if (msec == 0) |
3883 | mddev->safemode_delay = 0; | |
3884 | else { | |
19052c0e | 3885 | unsigned long old_delay = mddev->safemode_delay; |
1b30e66f N |
3886 | unsigned long new_delay = (msec*HZ)/1000; |
3887 | ||
3888 | if (new_delay == 0) | |
3889 | new_delay = 1; | |
3890 | mddev->safemode_delay = new_delay; | |
3891 | if (new_delay < old_delay || old_delay == 0) | |
3892 | mod_timer(&mddev->safemode_timer, jiffies+1); | |
16f17b39 N |
3893 | } |
3894 | return len; | |
3895 | } | |
3896 | static struct md_sysfs_entry md_safe_delay = | |
80ca3a44 | 3897 | __ATTR(safe_mode_delay, S_IRUGO|S_IWUSR,safe_delay_show, safe_delay_store); |
16f17b39 | 3898 | |
eae1701f | 3899 | static ssize_t |
fd01b88c | 3900 | level_show(struct mddev *mddev, char *page) |
eae1701f | 3901 | { |
36d091f4 N |
3902 | struct md_personality *p; |
3903 | int ret; | |
3904 | spin_lock(&mddev->lock); | |
3905 | p = mddev->pers; | |
d9d166c2 | 3906 | if (p) |
36d091f4 | 3907 | ret = sprintf(page, "%s\n", p->name); |
d9d166c2 | 3908 | else if (mddev->clevel[0]) |
36d091f4 | 3909 | ret = sprintf(page, "%s\n", mddev->clevel); |
d9d166c2 | 3910 | else if (mddev->level != LEVEL_NONE) |
36d091f4 | 3911 | ret = sprintf(page, "%d\n", mddev->level); |
d9d166c2 | 3912 | else |
36d091f4 N |
3913 | ret = 0; |
3914 | spin_unlock(&mddev->lock); | |
3915 | return ret; | |
eae1701f N |
3916 | } |
3917 | ||
d9d166c2 | 3918 | static ssize_t |
fd01b88c | 3919 | level_store(struct mddev *mddev, const char *buf, size_t len) |
d9d166c2 | 3920 | { |
f2859af6 | 3921 | char clevel[16]; |
6791875e N |
3922 | ssize_t rv; |
3923 | size_t slen = len; | |
db721d32 | 3924 | struct md_personality *pers, *oldpers; |
f2859af6 | 3925 | long level; |
db721d32 | 3926 | void *priv, *oldpriv; |
3cb03002 | 3927 | struct md_rdev *rdev; |
245f46c2 | 3928 | |
6791875e N |
3929 | if (slen == 0 || slen >= sizeof(clevel)) |
3930 | return -EINVAL; | |
3931 | ||
3932 | rv = mddev_lock(mddev); | |
3933 | if (rv) | |
3934 | return rv; | |
3935 | ||
245f46c2 | 3936 | if (mddev->pers == NULL) { |
6791875e N |
3937 | strncpy(mddev->clevel, buf, slen); |
3938 | if (mddev->clevel[slen-1] == '\n') | |
3939 | slen--; | |
3940 | mddev->clevel[slen] = 0; | |
245f46c2 | 3941 | mddev->level = LEVEL_NONE; |
6791875e N |
3942 | rv = len; |
3943 | goto out_unlock; | |
245f46c2 | 3944 | } |
6791875e | 3945 | rv = -EROFS; |
bd8839e0 | 3946 | if (mddev->ro) |
6791875e | 3947 | goto out_unlock; |
245f46c2 N |
3948 | |
3949 | /* request to change the personality. Need to ensure: | |
3950 | * - array is not engaged in resync/recovery/reshape | |
3951 | * - old personality can be suspended | |
3952 | * - new personality will access other array. | |
3953 | */ | |
3954 | ||
6791875e | 3955 | rv = -EBUSY; |
bb4f1e9d | 3956 | if (mddev->sync_thread || |
f851b60d | 3957 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
bb4f1e9d N |
3958 | mddev->reshape_position != MaxSector || |
3959 | mddev->sysfs_active) | |
6791875e | 3960 | goto out_unlock; |
245f46c2 | 3961 | |
6791875e | 3962 | rv = -EINVAL; |
245f46c2 | 3963 | if (!mddev->pers->quiesce) { |
9d48739e N |
3964 | pr_warn("md: %s: %s does not support online personality change\n", |
3965 | mdname(mddev), mddev->pers->name); | |
6791875e | 3966 | goto out_unlock; |
245f46c2 N |
3967 | } |
3968 | ||
3969 | /* Now find the new personality */ | |
6791875e N |
3970 | strncpy(clevel, buf, slen); |
3971 | if (clevel[slen-1] == '\n') | |
3972 | slen--; | |
3973 | clevel[slen] = 0; | |
b29bebd6 | 3974 | if (kstrtol(clevel, 10, &level)) |
f2859af6 | 3975 | level = LEVEL_NONE; |
245f46c2 | 3976 | |
f2859af6 DW |
3977 | if (request_module("md-%s", clevel) != 0) |
3978 | request_module("md-level-%s", clevel); | |
245f46c2 | 3979 | spin_lock(&pers_lock); |
f2859af6 | 3980 | pers = find_pers(level, clevel); |
245f46c2 N |
3981 | if (!pers || !try_module_get(pers->owner)) { |
3982 | spin_unlock(&pers_lock); | |
9d48739e | 3983 | pr_warn("md: personality %s not loaded\n", clevel); |
6791875e N |
3984 | rv = -EINVAL; |
3985 | goto out_unlock; | |
245f46c2 N |
3986 | } |
3987 | spin_unlock(&pers_lock); | |
3988 | ||
3989 | if (pers == mddev->pers) { | |
3990 | /* Nothing to do! */ | |
3991 | module_put(pers->owner); | |
6791875e N |
3992 | rv = len; |
3993 | goto out_unlock; | |
245f46c2 N |
3994 | } |
3995 | if (!pers->takeover) { | |
3996 | module_put(pers->owner); | |
9d48739e N |
3997 | pr_warn("md: %s: %s does not support personality takeover\n", |
3998 | mdname(mddev), clevel); | |
6791875e N |
3999 | rv = -EINVAL; |
4000 | goto out_unlock; | |
245f46c2 N |
4001 | } |
4002 | ||
dafb20fa | 4003 | rdev_for_each(rdev, mddev) |
e93f68a1 N |
4004 | rdev->new_raid_disk = rdev->raid_disk; |
4005 | ||
245f46c2 N |
4006 | /* ->takeover must set new_* and/or delta_disks |
4007 | * if it succeeds, and may set them when it fails. | |
4008 | */ | |
4009 | priv = pers->takeover(mddev); | |
4010 | if (IS_ERR(priv)) { | |
4011 | mddev->new_level = mddev->level; | |
4012 | mddev->new_layout = mddev->layout; | |
664e7c41 | 4013 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
245f46c2 N |
4014 | mddev->raid_disks -= mddev->delta_disks; |
4015 | mddev->delta_disks = 0; | |
2c810cdd | 4016 | mddev->reshape_backwards = 0; |
245f46c2 | 4017 | module_put(pers->owner); |
9d48739e N |
4018 | pr_warn("md: %s: %s would not accept array\n", |
4019 | mdname(mddev), clevel); | |
6791875e N |
4020 | rv = PTR_ERR(priv); |
4021 | goto out_unlock; | |
245f46c2 N |
4022 | } |
4023 | ||
4024 | /* Looks like we have a winner */ | |
4025 | mddev_suspend(mddev); | |
5aa61f42 | 4026 | mddev_detach(mddev); |
36d091f4 N |
4027 | |
4028 | spin_lock(&mddev->lock); | |
db721d32 N |
4029 | oldpers = mddev->pers; |
4030 | oldpriv = mddev->private; | |
4031 | mddev->pers = pers; | |
4032 | mddev->private = priv; | |
4033 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); | |
4034 | mddev->level = mddev->new_level; | |
4035 | mddev->layout = mddev->new_layout; | |
4036 | mddev->chunk_sectors = mddev->new_chunk_sectors; | |
4037 | mddev->delta_disks = 0; | |
4038 | mddev->reshape_backwards = 0; | |
4039 | mddev->degraded = 0; | |
36d091f4 | 4040 | spin_unlock(&mddev->lock); |
db721d32 N |
4041 | |
4042 | if (oldpers->sync_request == NULL && | |
4043 | mddev->external) { | |
4044 | /* We are converting from a no-redundancy array | |
4045 | * to a redundancy array and metadata is managed | |
4046 | * externally so we need to be sure that writes | |
4047 | * won't block due to a need to transition | |
4048 | * clean->dirty | |
4049 | * until external management is started. | |
4050 | */ | |
4051 | mddev->in_sync = 0; | |
4052 | mddev->safemode_delay = 0; | |
4053 | mddev->safemode = 0; | |
4054 | } | |
f72ffdd6 | 4055 | |
db721d32 N |
4056 | oldpers->free(mddev, oldpriv); |
4057 | ||
4058 | if (oldpers->sync_request == NULL && | |
a64c876f N |
4059 | pers->sync_request != NULL) { |
4060 | /* need to add the md_redundancy_group */ | |
4061 | if (sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
4062 | pr_warn("md: cannot register extra attributes for %s\n", |
4063 | mdname(mddev)); | |
388975cc | 4064 | mddev->sysfs_action = sysfs_get_dirent(mddev->kobj.sd, "sync_action"); |
e8efa9b8 JB |
4065 | mddev->sysfs_completed = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_completed"); |
4066 | mddev->sysfs_degraded = sysfs_get_dirent_safe(mddev->kobj.sd, "degraded"); | |
f72ffdd6 | 4067 | } |
db721d32 | 4068 | if (oldpers->sync_request != NULL && |
a64c876f N |
4069 | pers->sync_request == NULL) { |
4070 | /* need to remove the md_redundancy_group */ | |
4071 | if (mddev->to_remove == NULL) | |
4072 | mddev->to_remove = &md_redundancy_group; | |
4073 | } | |
4074 | ||
4cb9da7d AO |
4075 | module_put(oldpers->owner); |
4076 | ||
dafb20fa | 4077 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
4078 | if (rdev->raid_disk < 0) |
4079 | continue; | |
bf2cb0da | 4080 | if (rdev->new_raid_disk >= mddev->raid_disks) |
e93f68a1 N |
4081 | rdev->new_raid_disk = -1; |
4082 | if (rdev->new_raid_disk == rdev->raid_disk) | |
4083 | continue; | |
36fad858 | 4084 | sysfs_unlink_rdev(mddev, rdev); |
e93f68a1 | 4085 | } |
dafb20fa | 4086 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
4087 | if (rdev->raid_disk < 0) |
4088 | continue; | |
4089 | if (rdev->new_raid_disk == rdev->raid_disk) | |
4090 | continue; | |
4091 | rdev->raid_disk = rdev->new_raid_disk; | |
4092 | if (rdev->raid_disk < 0) | |
3a981b03 | 4093 | clear_bit(In_sync, &rdev->flags); |
e93f68a1 | 4094 | else { |
36fad858 | 4095 | if (sysfs_link_rdev(mddev, rdev)) |
9d48739e N |
4096 | pr_warn("md: cannot register rd%d for %s after level change\n", |
4097 | rdev->raid_disk, mdname(mddev)); | |
3a981b03 | 4098 | } |
e93f68a1 N |
4099 | } |
4100 | ||
db721d32 | 4101 | if (pers->sync_request == NULL) { |
9af204cf TM |
4102 | /* this is now an array without redundancy, so |
4103 | * it must always be in_sync | |
4104 | */ | |
4105 | mddev->in_sync = 1; | |
4106 | del_timer_sync(&mddev->safemode_timer); | |
4107 | } | |
02e5f5c0 | 4108 | blk_set_stacking_limits(&mddev->queue->limits); |
245f46c2 | 4109 | pers->run(mddev); |
2953079c | 4110 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
47525e59 | 4111 | mddev_resume(mddev); |
830778a1 N |
4112 | if (!mddev->thread) |
4113 | md_update_sb(mddev, 1); | |
e1a86dbb | 4114 | sysfs_notify_dirent_safe(mddev->sysfs_level); |
bb7f8d22 | 4115 | md_new_event(mddev); |
6791875e N |
4116 | rv = len; |
4117 | out_unlock: | |
4118 | mddev_unlock(mddev); | |
d9d166c2 N |
4119 | return rv; |
4120 | } | |
4121 | ||
4122 | static struct md_sysfs_entry md_level = | |
80ca3a44 | 4123 | __ATTR(level, S_IRUGO|S_IWUSR, level_show, level_store); |
eae1701f | 4124 | |
d4dbd025 | 4125 | static ssize_t |
fd01b88c | 4126 | layout_show(struct mddev *mddev, char *page) |
d4dbd025 N |
4127 | { |
4128 | /* just a number, not meaningful for all levels */ | |
08a02ecd N |
4129 | if (mddev->reshape_position != MaxSector && |
4130 | mddev->layout != mddev->new_layout) | |
4131 | return sprintf(page, "%d (%d)\n", | |
4132 | mddev->new_layout, mddev->layout); | |
d4dbd025 N |
4133 | return sprintf(page, "%d\n", mddev->layout); |
4134 | } | |
4135 | ||
4136 | static ssize_t | |
fd01b88c | 4137 | layout_store(struct mddev *mddev, const char *buf, size_t len) |
d4dbd025 | 4138 | { |
4c9309c0 | 4139 | unsigned int n; |
6791875e | 4140 | int err; |
d4dbd025 | 4141 | |
4c9309c0 AD |
4142 | err = kstrtouint(buf, 10, &n); |
4143 | if (err < 0) | |
4144 | return err; | |
6791875e N |
4145 | err = mddev_lock(mddev); |
4146 | if (err) | |
4147 | return err; | |
d4dbd025 | 4148 | |
b3546035 | 4149 | if (mddev->pers) { |
50ac168a | 4150 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
4151 | err = -EBUSY; |
4152 | else if (mddev->ro) | |
4153 | err = -EROFS; | |
4154 | else { | |
4155 | mddev->new_layout = n; | |
4156 | err = mddev->pers->check_reshape(mddev); | |
4157 | if (err) | |
4158 | mddev->new_layout = mddev->layout; | |
597a711b | 4159 | } |
b3546035 | 4160 | } else { |
08a02ecd | 4161 | mddev->new_layout = n; |
b3546035 N |
4162 | if (mddev->reshape_position == MaxSector) |
4163 | mddev->layout = n; | |
4164 | } | |
6791875e N |
4165 | mddev_unlock(mddev); |
4166 | return err ?: len; | |
d4dbd025 N |
4167 | } |
4168 | static struct md_sysfs_entry md_layout = | |
80ca3a44 | 4169 | __ATTR(layout, S_IRUGO|S_IWUSR, layout_show, layout_store); |
d4dbd025 | 4170 | |
eae1701f | 4171 | static ssize_t |
fd01b88c | 4172 | raid_disks_show(struct mddev *mddev, char *page) |
eae1701f | 4173 | { |
bb636547 N |
4174 | if (mddev->raid_disks == 0) |
4175 | return 0; | |
08a02ecd N |
4176 | if (mddev->reshape_position != MaxSector && |
4177 | mddev->delta_disks != 0) | |
4178 | return sprintf(page, "%d (%d)\n", mddev->raid_disks, | |
4179 | mddev->raid_disks - mddev->delta_disks); | |
eae1701f N |
4180 | return sprintf(page, "%d\n", mddev->raid_disks); |
4181 | } | |
4182 | ||
fd01b88c | 4183 | static int update_raid_disks(struct mddev *mddev, int raid_disks); |
da943b99 N |
4184 | |
4185 | static ssize_t | |
fd01b88c | 4186 | raid_disks_store(struct mddev *mddev, const char *buf, size_t len) |
da943b99 | 4187 | { |
4c9309c0 | 4188 | unsigned int n; |
6791875e | 4189 | int err; |
da943b99 | 4190 | |
4c9309c0 AD |
4191 | err = kstrtouint(buf, 10, &n); |
4192 | if (err < 0) | |
4193 | return err; | |
da943b99 | 4194 | |
6791875e N |
4195 | err = mddev_lock(mddev); |
4196 | if (err) | |
4197 | return err; | |
da943b99 | 4198 | if (mddev->pers) |
6791875e | 4199 | err = update_raid_disks(mddev, n); |
08a02ecd | 4200 | else if (mddev->reshape_position != MaxSector) { |
c6563a8c | 4201 | struct md_rdev *rdev; |
08a02ecd | 4202 | int olddisks = mddev->raid_disks - mddev->delta_disks; |
c6563a8c | 4203 | |
6791875e | 4204 | err = -EINVAL; |
c6563a8c N |
4205 | rdev_for_each(rdev, mddev) { |
4206 | if (olddisks < n && | |
4207 | rdev->data_offset < rdev->new_data_offset) | |
6791875e | 4208 | goto out_unlock; |
c6563a8c N |
4209 | if (olddisks > n && |
4210 | rdev->data_offset > rdev->new_data_offset) | |
6791875e | 4211 | goto out_unlock; |
c6563a8c | 4212 | } |
6791875e | 4213 | err = 0; |
08a02ecd N |
4214 | mddev->delta_disks = n - olddisks; |
4215 | mddev->raid_disks = n; | |
2c810cdd | 4216 | mddev->reshape_backwards = (mddev->delta_disks < 0); |
08a02ecd | 4217 | } else |
da943b99 | 4218 | mddev->raid_disks = n; |
6791875e N |
4219 | out_unlock: |
4220 | mddev_unlock(mddev); | |
4221 | return err ? err : len; | |
da943b99 N |
4222 | } |
4223 | static struct md_sysfs_entry md_raid_disks = | |
80ca3a44 | 4224 | __ATTR(raid_disks, S_IRUGO|S_IWUSR, raid_disks_show, raid_disks_store); |
eae1701f | 4225 | |
ec164d07 SP |
4226 | static ssize_t |
4227 | uuid_show(struct mddev *mddev, char *page) | |
4228 | { | |
4229 | return sprintf(page, "%pU\n", mddev->uuid); | |
4230 | } | |
4231 | static struct md_sysfs_entry md_uuid = | |
4232 | __ATTR(uuid, S_IRUGO, uuid_show, NULL); | |
4233 | ||
3b34380a | 4234 | static ssize_t |
fd01b88c | 4235 | chunk_size_show(struct mddev *mddev, char *page) |
3b34380a | 4236 | { |
08a02ecd | 4237 | if (mddev->reshape_position != MaxSector && |
664e7c41 AN |
4238 | mddev->chunk_sectors != mddev->new_chunk_sectors) |
4239 | return sprintf(page, "%d (%d)\n", | |
4240 | mddev->new_chunk_sectors << 9, | |
9d8f0363 AN |
4241 | mddev->chunk_sectors << 9); |
4242 | return sprintf(page, "%d\n", mddev->chunk_sectors << 9); | |
3b34380a N |
4243 | } |
4244 | ||
4245 | static ssize_t | |
fd01b88c | 4246 | chunk_size_store(struct mddev *mddev, const char *buf, size_t len) |
3b34380a | 4247 | { |
4c9309c0 | 4248 | unsigned long n; |
6791875e | 4249 | int err; |
3b34380a | 4250 | |
4c9309c0 AD |
4251 | err = kstrtoul(buf, 10, &n); |
4252 | if (err < 0) | |
4253 | return err; | |
3b34380a | 4254 | |
6791875e N |
4255 | err = mddev_lock(mddev); |
4256 | if (err) | |
4257 | return err; | |
b3546035 | 4258 | if (mddev->pers) { |
50ac168a | 4259 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
4260 | err = -EBUSY; |
4261 | else if (mddev->ro) | |
4262 | err = -EROFS; | |
4263 | else { | |
4264 | mddev->new_chunk_sectors = n >> 9; | |
4265 | err = mddev->pers->check_reshape(mddev); | |
4266 | if (err) | |
4267 | mddev->new_chunk_sectors = mddev->chunk_sectors; | |
597a711b | 4268 | } |
b3546035 | 4269 | } else { |
664e7c41 | 4270 | mddev->new_chunk_sectors = n >> 9; |
b3546035 | 4271 | if (mddev->reshape_position == MaxSector) |
9d8f0363 | 4272 | mddev->chunk_sectors = n >> 9; |
b3546035 | 4273 | } |
6791875e N |
4274 | mddev_unlock(mddev); |
4275 | return err ?: len; | |
3b34380a N |
4276 | } |
4277 | static struct md_sysfs_entry md_chunk_size = | |
80ca3a44 | 4278 | __ATTR(chunk_size, S_IRUGO|S_IWUSR, chunk_size_show, chunk_size_store); |
3b34380a | 4279 | |
a94213b1 | 4280 | static ssize_t |
fd01b88c | 4281 | resync_start_show(struct mddev *mddev, char *page) |
a94213b1 | 4282 | { |
d1a7c503 N |
4283 | if (mddev->recovery_cp == MaxSector) |
4284 | return sprintf(page, "none\n"); | |
a94213b1 N |
4285 | return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp); |
4286 | } | |
4287 | ||
4288 | static ssize_t | |
fd01b88c | 4289 | resync_start_store(struct mddev *mddev, const char *buf, size_t len) |
a94213b1 | 4290 | { |
4c9309c0 | 4291 | unsigned long long n; |
6791875e | 4292 | int err; |
4c9309c0 AD |
4293 | |
4294 | if (cmd_match(buf, "none")) | |
4295 | n = MaxSector; | |
4296 | else { | |
4297 | err = kstrtoull(buf, 10, &n); | |
4298 | if (err < 0) | |
4299 | return err; | |
4300 | if (n != (sector_t)n) | |
4301 | return -EINVAL; | |
4302 | } | |
a94213b1 | 4303 | |
6791875e N |
4304 | err = mddev_lock(mddev); |
4305 | if (err) | |
4306 | return err; | |
b098636c | 4307 | if (mddev->pers && !test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) |
6791875e | 4308 | err = -EBUSY; |
a94213b1 | 4309 | |
6791875e N |
4310 | if (!err) { |
4311 | mddev->recovery_cp = n; | |
4312 | if (mddev->pers) | |
2953079c | 4313 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
6791875e N |
4314 | } |
4315 | mddev_unlock(mddev); | |
4316 | return err ?: len; | |
a94213b1 N |
4317 | } |
4318 | static struct md_sysfs_entry md_resync_start = | |
750f199e N |
4319 | __ATTR_PREALLOC(resync_start, S_IRUGO|S_IWUSR, |
4320 | resync_start_show, resync_start_store); | |
a94213b1 | 4321 | |
9e653b63 N |
4322 | /* |
4323 | * The array state can be: | |
4324 | * | |
4325 | * clear | |
4326 | * No devices, no size, no level | |
4327 | * Equivalent to STOP_ARRAY ioctl | |
4328 | * inactive | |
4329 | * May have some settings, but array is not active | |
4330 | * all IO results in error | |
4331 | * When written, doesn't tear down array, but just stops it | |
4332 | * suspended (not supported yet) | |
4333 | * All IO requests will block. The array can be reconfigured. | |
910d8cb3 | 4334 | * Writing this, if accepted, will block until array is quiescent |
9e653b63 N |
4335 | * readonly |
4336 | * no resync can happen. no superblocks get written. | |
4337 | * write requests fail | |
4338 | * read-auto | |
4339 | * like readonly, but behaves like 'clean' on a write request. | |
4340 | * | |
4341 | * clean - no pending writes, but otherwise active. | |
4342 | * When written to inactive array, starts without resync | |
4343 | * If a write request arrives then | |
4344 | * if metadata is known, mark 'dirty' and switch to 'active'. | |
4345 | * if not known, block and switch to write-pending | |
4346 | * If written to an active array that has pending writes, then fails. | |
4347 | * active | |
4348 | * fully active: IO and resync can be happening. | |
4349 | * When written to inactive array, starts with resync | |
4350 | * | |
4351 | * write-pending | |
4352 | * clean, but writes are blocked waiting for 'active' to be written. | |
4353 | * | |
4354 | * active-idle | |
4355 | * like active, but no writes have been seen for a while (100msec). | |
4356 | * | |
62f7b198 GP |
4357 | * broken |
4358 | * RAID0/LINEAR-only: same as clean, but array is missing a member. | |
4359 | * It's useful because RAID0/LINEAR mounted-arrays aren't stopped | |
4360 | * when a member is gone, so this state will at least alert the | |
4361 | * user that something is wrong. | |
9e653b63 N |
4362 | */ |
4363 | enum array_state { clear, inactive, suspended, readonly, read_auto, clean, active, | |
62f7b198 | 4364 | write_pending, active_idle, broken, bad_word}; |
05381954 | 4365 | static char *array_states[] = { |
9e653b63 | 4366 | "clear", "inactive", "suspended", "readonly", "read-auto", "clean", "active", |
62f7b198 | 4367 | "write-pending", "active-idle", "broken", NULL }; |
9e653b63 N |
4368 | |
4369 | static int match_word(const char *word, char **list) | |
4370 | { | |
4371 | int n; | |
4372 | for (n=0; list[n]; n++) | |
4373 | if (cmd_match(word, list[n])) | |
4374 | break; | |
4375 | return n; | |
4376 | } | |
4377 | ||
4378 | static ssize_t | |
fd01b88c | 4379 | array_state_show(struct mddev *mddev, char *page) |
9e653b63 N |
4380 | { |
4381 | enum array_state st = inactive; | |
4382 | ||
62f7b198 | 4383 | if (mddev->pers && !test_bit(MD_NOT_READY, &mddev->flags)) { |
9e653b63 N |
4384 | switch(mddev->ro) { |
4385 | case 1: | |
4386 | st = readonly; | |
4387 | break; | |
4388 | case 2: | |
4389 | st = read_auto; | |
4390 | break; | |
4391 | case 0: | |
55cc39f3 | 4392 | spin_lock(&mddev->lock); |
2953079c | 4393 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
e691063a | 4394 | st = write_pending; |
16f88949 TM |
4395 | else if (mddev->in_sync) |
4396 | st = clean; | |
9e653b63 N |
4397 | else if (mddev->safemode) |
4398 | st = active_idle; | |
4399 | else | |
4400 | st = active; | |
55cc39f3 | 4401 | spin_unlock(&mddev->lock); |
9e653b63 | 4402 | } |
62f7b198 GP |
4403 | |
4404 | if (test_bit(MD_BROKEN, &mddev->flags) && st == clean) | |
4405 | st = broken; | |
4406 | } else { | |
9e653b63 N |
4407 | if (list_empty(&mddev->disks) && |
4408 | mddev->raid_disks == 0 && | |
58c0fed4 | 4409 | mddev->dev_sectors == 0) |
9e653b63 N |
4410 | st = clear; |
4411 | else | |
4412 | st = inactive; | |
4413 | } | |
4414 | return sprintf(page, "%s\n", array_states[st]); | |
4415 | } | |
4416 | ||
f72ffdd6 N |
4417 | static int do_md_stop(struct mddev *mddev, int ro, struct block_device *bdev); |
4418 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev); | |
fd01b88c | 4419 | static int restart_array(struct mddev *mddev); |
9e653b63 N |
4420 | |
4421 | static ssize_t | |
fd01b88c | 4422 | array_state_store(struct mddev *mddev, const char *buf, size_t len) |
9e653b63 | 4423 | { |
6497709b | 4424 | int err = 0; |
9e653b63 | 4425 | enum array_state st = match_word(buf, array_states); |
6791875e N |
4426 | |
4427 | if (mddev->pers && (st == active || st == clean) && mddev->ro != 1) { | |
4428 | /* don't take reconfig_mutex when toggling between | |
4429 | * clean and active | |
4430 | */ | |
4431 | spin_lock(&mddev->lock); | |
4432 | if (st == active) { | |
4433 | restart_array(mddev); | |
2953079c | 4434 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
91a6c4ad | 4435 | md_wakeup_thread(mddev->thread); |
6791875e | 4436 | wake_up(&mddev->sb_wait); |
6791875e N |
4437 | } else /* st == clean */ { |
4438 | restart_array(mddev); | |
6497709b | 4439 | if (!set_in_sync(mddev)) |
6791875e N |
4440 | err = -EBUSY; |
4441 | } | |
573275b5 TM |
4442 | if (!err) |
4443 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
6791875e | 4444 | spin_unlock(&mddev->lock); |
c008f1d3 | 4445 | return err ?: len; |
6791875e N |
4446 | } |
4447 | err = mddev_lock(mddev); | |
4448 | if (err) | |
4449 | return err; | |
4450 | err = -EINVAL; | |
9e653b63 N |
4451 | switch(st) { |
4452 | case bad_word: | |
4453 | break; | |
4454 | case clear: | |
4455 | /* stopping an active array */ | |
a05b7ea0 | 4456 | err = do_md_stop(mddev, 0, NULL); |
9e653b63 N |
4457 | break; |
4458 | case inactive: | |
4459 | /* stopping an active array */ | |
90cf195d | 4460 | if (mddev->pers) |
a05b7ea0 | 4461 | err = do_md_stop(mddev, 2, NULL); |
90cf195d | 4462 | else |
e691063a | 4463 | err = 0; /* already inactive */ |
9e653b63 N |
4464 | break; |
4465 | case suspended: | |
4466 | break; /* not supported yet */ | |
4467 | case readonly: | |
4468 | if (mddev->pers) | |
a05b7ea0 | 4469 | err = md_set_readonly(mddev, NULL); |
9e653b63 N |
4470 | else { |
4471 | mddev->ro = 1; | |
648b629e | 4472 | set_disk_ro(mddev->gendisk, 1); |
9e653b63 N |
4473 | err = do_md_run(mddev); |
4474 | } | |
4475 | break; | |
4476 | case read_auto: | |
9e653b63 | 4477 | if (mddev->pers) { |
80268ee9 | 4478 | if (mddev->ro == 0) |
a05b7ea0 | 4479 | err = md_set_readonly(mddev, NULL); |
80268ee9 | 4480 | else if (mddev->ro == 1) |
648b629e N |
4481 | err = restart_array(mddev); |
4482 | if (err == 0) { | |
4483 | mddev->ro = 2; | |
4484 | set_disk_ro(mddev->gendisk, 0); | |
4485 | } | |
9e653b63 N |
4486 | } else { |
4487 | mddev->ro = 2; | |
4488 | err = do_md_run(mddev); | |
4489 | } | |
4490 | break; | |
4491 | case clean: | |
4492 | if (mddev->pers) { | |
339421de SL |
4493 | err = restart_array(mddev); |
4494 | if (err) | |
4495 | break; | |
85572d7c | 4496 | spin_lock(&mddev->lock); |
6497709b | 4497 | if (!set_in_sync(mddev)) |
e691063a | 4498 | err = -EBUSY; |
85572d7c | 4499 | spin_unlock(&mddev->lock); |
5bf29597 N |
4500 | } else |
4501 | err = -EINVAL; | |
9e653b63 N |
4502 | break; |
4503 | case active: | |
4504 | if (mddev->pers) { | |
339421de SL |
4505 | err = restart_array(mddev); |
4506 | if (err) | |
4507 | break; | |
2953079c | 4508 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
9e653b63 N |
4509 | wake_up(&mddev->sb_wait); |
4510 | err = 0; | |
4511 | } else { | |
4512 | mddev->ro = 0; | |
648b629e | 4513 | set_disk_ro(mddev->gendisk, 0); |
9e653b63 N |
4514 | err = do_md_run(mddev); |
4515 | } | |
4516 | break; | |
4517 | case write_pending: | |
4518 | case active_idle: | |
62f7b198 | 4519 | case broken: |
9e653b63 N |
4520 | /* these cannot be set */ |
4521 | break; | |
4522 | } | |
6791875e N |
4523 | |
4524 | if (!err) { | |
1d23f178 N |
4525 | if (mddev->hold_active == UNTIL_IOCTL) |
4526 | mddev->hold_active = 0; | |
00bcb4ac | 4527 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 4528 | } |
6791875e N |
4529 | mddev_unlock(mddev); |
4530 | return err ?: len; | |
9e653b63 | 4531 | } |
80ca3a44 | 4532 | static struct md_sysfs_entry md_array_state = |
750f199e | 4533 | __ATTR_PREALLOC(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store); |
9e653b63 | 4534 | |
1e50915f | 4535 | static ssize_t |
fd01b88c | 4536 | max_corrected_read_errors_show(struct mddev *mddev, char *page) { |
1e50915f RB |
4537 | return sprintf(page, "%d\n", |
4538 | atomic_read(&mddev->max_corr_read_errors)); | |
4539 | } | |
4540 | ||
4541 | static ssize_t | |
fd01b88c | 4542 | max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len) |
1e50915f | 4543 | { |
4c9309c0 AD |
4544 | unsigned int n; |
4545 | int rv; | |
1e50915f | 4546 | |
4c9309c0 AD |
4547 | rv = kstrtouint(buf, 10, &n); |
4548 | if (rv < 0) | |
4549 | return rv; | |
4550 | atomic_set(&mddev->max_corr_read_errors, n); | |
4551 | return len; | |
1e50915f RB |
4552 | } |
4553 | ||
4554 | static struct md_sysfs_entry max_corr_read_errors = | |
4555 | __ATTR(max_read_errors, S_IRUGO|S_IWUSR, max_corrected_read_errors_show, | |
4556 | max_corrected_read_errors_store); | |
4557 | ||
6d7ff738 | 4558 | static ssize_t |
fd01b88c | 4559 | null_show(struct mddev *mddev, char *page) |
6d7ff738 N |
4560 | { |
4561 | return -EINVAL; | |
4562 | } | |
4563 | ||
cc1ffe61 GJ |
4564 | /* need to ensure rdev_delayed_delete() has completed */ |
4565 | static void flush_rdev_wq(struct mddev *mddev) | |
4566 | { | |
4567 | struct md_rdev *rdev; | |
4568 | ||
4569 | rcu_read_lock(); | |
4570 | rdev_for_each_rcu(rdev, mddev) | |
4571 | if (work_pending(&rdev->del_work)) { | |
4572 | flush_workqueue(md_rdev_misc_wq); | |
4573 | break; | |
4574 | } | |
4575 | rcu_read_unlock(); | |
4576 | } | |
4577 | ||
6d7ff738 | 4578 | static ssize_t |
fd01b88c | 4579 | new_dev_store(struct mddev *mddev, const char *buf, size_t len) |
6d7ff738 N |
4580 | { |
4581 | /* buf must be %d:%d\n? giving major and minor numbers */ | |
4582 | /* The new device is added to the array. | |
4583 | * If the array has a persistent superblock, we read the | |
4584 | * superblock to initialise info and check validity. | |
4585 | * Otherwise, only checking done is that in bind_rdev_to_array, | |
4586 | * which mainly checks size. | |
4587 | */ | |
4588 | char *e; | |
4589 | int major = simple_strtoul(buf, &e, 10); | |
4590 | int minor; | |
4591 | dev_t dev; | |
3cb03002 | 4592 | struct md_rdev *rdev; |
6d7ff738 N |
4593 | int err; |
4594 | ||
4595 | if (!*buf || *e != ':' || !e[1] || e[1] == '\n') | |
4596 | return -EINVAL; | |
4597 | minor = simple_strtoul(e+1, &e, 10); | |
4598 | if (*e && *e != '\n') | |
4599 | return -EINVAL; | |
4600 | dev = MKDEV(major, minor); | |
4601 | if (major != MAJOR(dev) || | |
4602 | minor != MINOR(dev)) | |
4603 | return -EOVERFLOW; | |
4604 | ||
cc1ffe61 | 4605 | flush_rdev_wq(mddev); |
6791875e N |
4606 | err = mddev_lock(mddev); |
4607 | if (err) | |
4608 | return err; | |
6d7ff738 N |
4609 | if (mddev->persistent) { |
4610 | rdev = md_import_device(dev, mddev->major_version, | |
4611 | mddev->minor_version); | |
4612 | if (!IS_ERR(rdev) && !list_empty(&mddev->disks)) { | |
3cb03002 N |
4613 | struct md_rdev *rdev0 |
4614 | = list_entry(mddev->disks.next, | |
4615 | struct md_rdev, same_set); | |
6d7ff738 N |
4616 | err = super_types[mddev->major_version] |
4617 | .load_super(rdev, rdev0, mddev->minor_version); | |
4618 | if (err < 0) | |
4619 | goto out; | |
4620 | } | |
c5d79adb N |
4621 | } else if (mddev->external) |
4622 | rdev = md_import_device(dev, -2, -1); | |
4623 | else | |
6d7ff738 N |
4624 | rdev = md_import_device(dev, -1, -1); |
4625 | ||
9a8c0fa8 N |
4626 | if (IS_ERR(rdev)) { |
4627 | mddev_unlock(mddev); | |
6d7ff738 | 4628 | return PTR_ERR(rdev); |
9a8c0fa8 | 4629 | } |
6d7ff738 N |
4630 | err = bind_rdev_to_array(rdev, mddev); |
4631 | out: | |
4632 | if (err) | |
4633 | export_rdev(rdev); | |
6791875e | 4634 | mddev_unlock(mddev); |
5492c46e AO |
4635 | if (!err) |
4636 | md_new_event(mddev); | |
6d7ff738 N |
4637 | return err ? err : len; |
4638 | } | |
4639 | ||
4640 | static struct md_sysfs_entry md_new_device = | |
80ca3a44 | 4641 | __ATTR(new_dev, S_IWUSR, null_show, new_dev_store); |
3b34380a | 4642 | |
9b1d1dac | 4643 | static ssize_t |
fd01b88c | 4644 | bitmap_store(struct mddev *mddev, const char *buf, size_t len) |
9b1d1dac PC |
4645 | { |
4646 | char *end; | |
4647 | unsigned long chunk, end_chunk; | |
6791875e | 4648 | int err; |
9b1d1dac | 4649 | |
6791875e N |
4650 | err = mddev_lock(mddev); |
4651 | if (err) | |
4652 | return err; | |
9b1d1dac PC |
4653 | if (!mddev->bitmap) |
4654 | goto out; | |
4655 | /* buf should be <chunk> <chunk> ... or <chunk>-<chunk> ... (range) */ | |
4656 | while (*buf) { | |
4657 | chunk = end_chunk = simple_strtoul(buf, &end, 0); | |
4658 | if (buf == end) break; | |
4659 | if (*end == '-') { /* range */ | |
4660 | buf = end + 1; | |
4661 | end_chunk = simple_strtoul(buf, &end, 0); | |
4662 | if (buf == end) break; | |
4663 | } | |
4664 | if (*end && !isspace(*end)) break; | |
e64e4018 | 4665 | md_bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk); |
e7d2860b | 4666 | buf = skip_spaces(end); |
9b1d1dac | 4667 | } |
e64e4018 | 4668 | md_bitmap_unplug(mddev->bitmap); /* flush the bits to disk */ |
9b1d1dac | 4669 | out: |
6791875e | 4670 | mddev_unlock(mddev); |
9b1d1dac PC |
4671 | return len; |
4672 | } | |
4673 | ||
4674 | static struct md_sysfs_entry md_bitmap = | |
4675 | __ATTR(bitmap_set_bits, S_IWUSR, null_show, bitmap_store); | |
4676 | ||
a35b0d69 | 4677 | static ssize_t |
fd01b88c | 4678 | size_show(struct mddev *mddev, char *page) |
a35b0d69 | 4679 | { |
58c0fed4 AN |
4680 | return sprintf(page, "%llu\n", |
4681 | (unsigned long long)mddev->dev_sectors / 2); | |
a35b0d69 N |
4682 | } |
4683 | ||
fd01b88c | 4684 | static int update_size(struct mddev *mddev, sector_t num_sectors); |
a35b0d69 N |
4685 | |
4686 | static ssize_t | |
fd01b88c | 4687 | size_store(struct mddev *mddev, const char *buf, size_t len) |
a35b0d69 N |
4688 | { |
4689 | /* If array is inactive, we can reduce the component size, but | |
4690 | * not increase it (except from 0). | |
4691 | * If array is active, we can try an on-line resize | |
4692 | */ | |
b522adcd DW |
4693 | sector_t sectors; |
4694 | int err = strict_blocks_to_sectors(buf, §ors); | |
a35b0d69 | 4695 | |
58c0fed4 AN |
4696 | if (err < 0) |
4697 | return err; | |
6791875e N |
4698 | err = mddev_lock(mddev); |
4699 | if (err) | |
4700 | return err; | |
a35b0d69 | 4701 | if (mddev->pers) { |
58c0fed4 | 4702 | err = update_size(mddev, sectors); |
4ba1e788 XN |
4703 | if (err == 0) |
4704 | md_update_sb(mddev, 1); | |
a35b0d69 | 4705 | } else { |
58c0fed4 AN |
4706 | if (mddev->dev_sectors == 0 || |
4707 | mddev->dev_sectors > sectors) | |
4708 | mddev->dev_sectors = sectors; | |
a35b0d69 N |
4709 | else |
4710 | err = -ENOSPC; | |
4711 | } | |
6791875e | 4712 | mddev_unlock(mddev); |
a35b0d69 N |
4713 | return err ? err : len; |
4714 | } | |
4715 | ||
4716 | static struct md_sysfs_entry md_size = | |
80ca3a44 | 4717 | __ATTR(component_size, S_IRUGO|S_IWUSR, size_show, size_store); |
a35b0d69 | 4718 | |
83f0d77a | 4719 | /* Metadata version. |
e691063a N |
4720 | * This is one of |
4721 | * 'none' for arrays with no metadata (good luck...) | |
4722 | * 'external' for arrays with externally managed metadata, | |
8bb93aac N |
4723 | * or N.M for internally known formats |
4724 | */ | |
4725 | static ssize_t | |
fd01b88c | 4726 | metadata_show(struct mddev *mddev, char *page) |
8bb93aac N |
4727 | { |
4728 | if (mddev->persistent) | |
4729 | return sprintf(page, "%d.%d\n", | |
4730 | mddev->major_version, mddev->minor_version); | |
e691063a N |
4731 | else if (mddev->external) |
4732 | return sprintf(page, "external:%s\n", mddev->metadata_type); | |
8bb93aac N |
4733 | else |
4734 | return sprintf(page, "none\n"); | |
4735 | } | |
4736 | ||
4737 | static ssize_t | |
fd01b88c | 4738 | metadata_store(struct mddev *mddev, const char *buf, size_t len) |
8bb93aac N |
4739 | { |
4740 | int major, minor; | |
4741 | char *e; | |
6791875e | 4742 | int err; |
ea43ddd8 N |
4743 | /* Changing the details of 'external' metadata is |
4744 | * always permitted. Otherwise there must be | |
4745 | * no devices attached to the array. | |
4746 | */ | |
6791875e N |
4747 | |
4748 | err = mddev_lock(mddev); | |
4749 | if (err) | |
4750 | return err; | |
4751 | err = -EBUSY; | |
ea43ddd8 N |
4752 | if (mddev->external && strncmp(buf, "external:", 9) == 0) |
4753 | ; | |
4754 | else if (!list_empty(&mddev->disks)) | |
6791875e | 4755 | goto out_unlock; |
8bb93aac | 4756 | |
6791875e | 4757 | err = 0; |
8bb93aac N |
4758 | if (cmd_match(buf, "none")) { |
4759 | mddev->persistent = 0; | |
e691063a N |
4760 | mddev->external = 0; |
4761 | mddev->major_version = 0; | |
4762 | mddev->minor_version = 90; | |
6791875e | 4763 | goto out_unlock; |
e691063a N |
4764 | } |
4765 | if (strncmp(buf, "external:", 9) == 0) { | |
20a49ff6 | 4766 | size_t namelen = len-9; |
e691063a N |
4767 | if (namelen >= sizeof(mddev->metadata_type)) |
4768 | namelen = sizeof(mddev->metadata_type)-1; | |
4769 | strncpy(mddev->metadata_type, buf+9, namelen); | |
4770 | mddev->metadata_type[namelen] = 0; | |
4771 | if (namelen && mddev->metadata_type[namelen-1] == '\n') | |
4772 | mddev->metadata_type[--namelen] = 0; | |
4773 | mddev->persistent = 0; | |
4774 | mddev->external = 1; | |
8bb93aac N |
4775 | mddev->major_version = 0; |
4776 | mddev->minor_version = 90; | |
6791875e | 4777 | goto out_unlock; |
8bb93aac N |
4778 | } |
4779 | major = simple_strtoul(buf, &e, 10); | |
6791875e | 4780 | err = -EINVAL; |
8bb93aac | 4781 | if (e==buf || *e != '.') |
6791875e | 4782 | goto out_unlock; |
8bb93aac N |
4783 | buf = e+1; |
4784 | minor = simple_strtoul(buf, &e, 10); | |
3f9d7b0d | 4785 | if (e==buf || (*e && *e != '\n') ) |
6791875e N |
4786 | goto out_unlock; |
4787 | err = -ENOENT; | |
50511da3 | 4788 | if (major >= ARRAY_SIZE(super_types) || super_types[major].name == NULL) |
6791875e | 4789 | goto out_unlock; |
8bb93aac N |
4790 | mddev->major_version = major; |
4791 | mddev->minor_version = minor; | |
4792 | mddev->persistent = 1; | |
e691063a | 4793 | mddev->external = 0; |
6791875e N |
4794 | err = 0; |
4795 | out_unlock: | |
4796 | mddev_unlock(mddev); | |
4797 | return err ?: len; | |
8bb93aac N |
4798 | } |
4799 | ||
4800 | static struct md_sysfs_entry md_metadata = | |
750f199e | 4801 | __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store); |
8bb93aac | 4802 | |
24dd469d | 4803 | static ssize_t |
fd01b88c | 4804 | action_show(struct mddev *mddev, char *page) |
24dd469d | 4805 | { |
7eec314d | 4806 | char *type = "idle"; |
b7b17c9b N |
4807 | unsigned long recovery = mddev->recovery; |
4808 | if (test_bit(MD_RECOVERY_FROZEN, &recovery)) | |
b6a9ce68 | 4809 | type = "frozen"; |
b7b17c9b N |
4810 | else if (test_bit(MD_RECOVERY_RUNNING, &recovery) || |
4811 | (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &recovery))) { | |
4812 | if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) | |
ccfcc3c1 | 4813 | type = "reshape"; |
b7b17c9b N |
4814 | else if (test_bit(MD_RECOVERY_SYNC, &recovery)) { |
4815 | if (!test_bit(MD_RECOVERY_REQUESTED, &recovery)) | |
24dd469d | 4816 | type = "resync"; |
b7b17c9b | 4817 | else if (test_bit(MD_RECOVERY_CHECK, &recovery)) |
24dd469d N |
4818 | type = "check"; |
4819 | else | |
4820 | type = "repair"; | |
b7b17c9b | 4821 | } else if (test_bit(MD_RECOVERY_RECOVER, &recovery)) |
24dd469d | 4822 | type = "recover"; |
985ca973 N |
4823 | else if (mddev->reshape_position != MaxSector) |
4824 | type = "reshape"; | |
24dd469d N |
4825 | } |
4826 | return sprintf(page, "%s\n", type); | |
4827 | } | |
4828 | ||
4829 | static ssize_t | |
fd01b88c | 4830 | action_store(struct mddev *mddev, const char *page, size_t len) |
24dd469d | 4831 | { |
7eec314d N |
4832 | if (!mddev->pers || !mddev->pers->sync_request) |
4833 | return -EINVAL; | |
4834 | ||
b6a9ce68 N |
4835 | |
4836 | if (cmd_match(page, "idle") || cmd_match(page, "frozen")) { | |
56ccc112 N |
4837 | if (cmd_match(page, "frozen")) |
4838 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4839 | else | |
4840 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
8e8e2518 N |
4841 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
4842 | mddev_lock(mddev) == 0) { | |
cc1ffe61 GJ |
4843 | if (work_pending(&mddev->del_work)) |
4844 | flush_workqueue(md_misc_wq); | |
8e8e2518 N |
4845 | if (mddev->sync_thread) { |
4846 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
6791875e | 4847 | md_reap_sync_thread(mddev); |
6791875e | 4848 | } |
8e8e2518 | 4849 | mddev_unlock(mddev); |
7eec314d | 4850 | } |
312045ee | 4851 | } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
24dd469d | 4852 | return -EBUSY; |
72a23c21 | 4853 | else if (cmd_match(page, "resync")) |
56ccc112 | 4854 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4855 | else if (cmd_match(page, "recover")) { |
56ccc112 | 4856 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4857 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
72a23c21 | 4858 | } else if (cmd_match(page, "reshape")) { |
16484bf5 N |
4859 | int err; |
4860 | if (mddev->pers->start_reshape == NULL) | |
4861 | return -EINVAL; | |
6791875e N |
4862 | err = mddev_lock(mddev); |
4863 | if (!err) { | |
312045ee N |
4864 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4865 | err = -EBUSY; | |
4866 | else { | |
4867 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4868 | err = mddev->pers->start_reshape(mddev); | |
4869 | } | |
6791875e N |
4870 | mddev_unlock(mddev); |
4871 | } | |
16484bf5 N |
4872 | if (err) |
4873 | return err; | |
e1a86dbb | 4874 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
16484bf5 | 4875 | } else { |
bce74dac | 4876 | if (cmd_match(page, "check")) |
7eec314d | 4877 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
2adc7d47 | 4878 | else if (!cmd_match(page, "repair")) |
7eec314d | 4879 | return -EINVAL; |
56ccc112 | 4880 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
7eec314d N |
4881 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
4882 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
7eec314d | 4883 | } |
48c26ddc N |
4884 | if (mddev->ro == 2) { |
4885 | /* A write to sync_action is enough to justify | |
4886 | * canceling read-auto mode | |
4887 | */ | |
4888 | mddev->ro = 0; | |
4889 | md_wakeup_thread(mddev->sync_thread); | |
4890 | } | |
03c902e1 | 4891 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
24dd469d | 4892 | md_wakeup_thread(mddev->thread); |
00bcb4ac | 4893 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
24dd469d N |
4894 | return len; |
4895 | } | |
4896 | ||
c4a39551 | 4897 | static struct md_sysfs_entry md_scan_mode = |
750f199e | 4898 | __ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store); |
c4a39551 JB |
4899 | |
4900 | static ssize_t | |
4901 | last_sync_action_show(struct mddev *mddev, char *page) | |
4902 | { | |
4903 | return sprintf(page, "%s\n", mddev->last_sync_action); | |
4904 | } | |
4905 | ||
4906 | static struct md_sysfs_entry md_last_scan_mode = __ATTR_RO(last_sync_action); | |
4907 | ||
9d88883e | 4908 | static ssize_t |
fd01b88c | 4909 | mismatch_cnt_show(struct mddev *mddev, char *page) |
9d88883e N |
4910 | { |
4911 | return sprintf(page, "%llu\n", | |
7f7583d4 JM |
4912 | (unsigned long long) |
4913 | atomic64_read(&mddev->resync_mismatches)); | |
9d88883e N |
4914 | } |
4915 | ||
80ca3a44 | 4916 | static struct md_sysfs_entry md_mismatches = __ATTR_RO(mismatch_cnt); |
9d88883e | 4917 | |
88202a0c | 4918 | static ssize_t |
fd01b88c | 4919 | sync_min_show(struct mddev *mddev, char *page) |
88202a0c N |
4920 | { |
4921 | return sprintf(page, "%d (%s)\n", speed_min(mddev), | |
4922 | mddev->sync_speed_min ? "local": "system"); | |
4923 | } | |
4924 | ||
4925 | static ssize_t | |
fd01b88c | 4926 | sync_min_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4927 | { |
4c9309c0 AD |
4928 | unsigned int min; |
4929 | int rv; | |
4930 | ||
88202a0c | 4931 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4932 | min = 0; |
4933 | } else { | |
4934 | rv = kstrtouint(buf, 10, &min); | |
4935 | if (rv < 0) | |
4936 | return rv; | |
4937 | if (min == 0) | |
4938 | return -EINVAL; | |
88202a0c | 4939 | } |
88202a0c N |
4940 | mddev->sync_speed_min = min; |
4941 | return len; | |
4942 | } | |
4943 | ||
4944 | static struct md_sysfs_entry md_sync_min = | |
4945 | __ATTR(sync_speed_min, S_IRUGO|S_IWUSR, sync_min_show, sync_min_store); | |
4946 | ||
4947 | static ssize_t | |
fd01b88c | 4948 | sync_max_show(struct mddev *mddev, char *page) |
88202a0c N |
4949 | { |
4950 | return sprintf(page, "%d (%s)\n", speed_max(mddev), | |
4951 | mddev->sync_speed_max ? "local": "system"); | |
4952 | } | |
4953 | ||
4954 | static ssize_t | |
fd01b88c | 4955 | sync_max_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4956 | { |
4c9309c0 AD |
4957 | unsigned int max; |
4958 | int rv; | |
4959 | ||
88202a0c | 4960 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4961 | max = 0; |
4962 | } else { | |
4963 | rv = kstrtouint(buf, 10, &max); | |
4964 | if (rv < 0) | |
4965 | return rv; | |
4966 | if (max == 0) | |
4967 | return -EINVAL; | |
88202a0c | 4968 | } |
88202a0c N |
4969 | mddev->sync_speed_max = max; |
4970 | return len; | |
4971 | } | |
4972 | ||
4973 | static struct md_sysfs_entry md_sync_max = | |
4974 | __ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store); | |
4975 | ||
d7f3d291 | 4976 | static ssize_t |
fd01b88c | 4977 | degraded_show(struct mddev *mddev, char *page) |
d7f3d291 IP |
4978 | { |
4979 | return sprintf(page, "%d\n", mddev->degraded); | |
4980 | } | |
4981 | static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded); | |
88202a0c | 4982 | |
90b08710 | 4983 | static ssize_t |
fd01b88c | 4984 | sync_force_parallel_show(struct mddev *mddev, char *page) |
90b08710 BS |
4985 | { |
4986 | return sprintf(page, "%d\n", mddev->parallel_resync); | |
4987 | } | |
4988 | ||
4989 | static ssize_t | |
fd01b88c | 4990 | sync_force_parallel_store(struct mddev *mddev, const char *buf, size_t len) |
90b08710 BS |
4991 | { |
4992 | long n; | |
4993 | ||
b29bebd6 | 4994 | if (kstrtol(buf, 10, &n)) |
90b08710 BS |
4995 | return -EINVAL; |
4996 | ||
4997 | if (n != 0 && n != 1) | |
4998 | return -EINVAL; | |
4999 | ||
5000 | mddev->parallel_resync = n; | |
5001 | ||
5002 | if (mddev->sync_thread) | |
5003 | wake_up(&resync_wait); | |
5004 | ||
5005 | return len; | |
5006 | } | |
5007 | ||
5008 | /* force parallel resync, even with shared block devices */ | |
5009 | static struct md_sysfs_entry md_sync_force_parallel = | |
5010 | __ATTR(sync_force_parallel, S_IRUGO|S_IWUSR, | |
5011 | sync_force_parallel_show, sync_force_parallel_store); | |
5012 | ||
88202a0c | 5013 | static ssize_t |
fd01b88c | 5014 | sync_speed_show(struct mddev *mddev, char *page) |
88202a0c N |
5015 | { |
5016 | unsigned long resync, dt, db; | |
d1a7c503 N |
5017 | if (mddev->curr_resync == 0) |
5018 | return sprintf(page, "none\n"); | |
9687a60c AN |
5019 | resync = mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active); |
5020 | dt = (jiffies - mddev->resync_mark) / HZ; | |
88202a0c | 5021 | if (!dt) dt++; |
9687a60c AN |
5022 | db = resync - mddev->resync_mark_cnt; |
5023 | return sprintf(page, "%lu\n", db/dt/2); /* K/sec */ | |
88202a0c N |
5024 | } |
5025 | ||
80ca3a44 | 5026 | static struct md_sysfs_entry md_sync_speed = __ATTR_RO(sync_speed); |
88202a0c N |
5027 | |
5028 | static ssize_t | |
fd01b88c | 5029 | sync_completed_show(struct mddev *mddev, char *page) |
88202a0c | 5030 | { |
13ae864b | 5031 | unsigned long long max_sectors, resync; |
88202a0c | 5032 | |
acb180b0 N |
5033 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
5034 | return sprintf(page, "none\n"); | |
5035 | ||
72f36d59 N |
5036 | if (mddev->curr_resync == 1 || |
5037 | mddev->curr_resync == 2) | |
5038 | return sprintf(page, "delayed\n"); | |
5039 | ||
c804cdec N |
5040 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
5041 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
58c0fed4 | 5042 | max_sectors = mddev->resync_max_sectors; |
88202a0c | 5043 | else |
58c0fed4 | 5044 | max_sectors = mddev->dev_sectors; |
88202a0c | 5045 | |
acb180b0 | 5046 | resync = mddev->curr_resync_completed; |
13ae864b | 5047 | return sprintf(page, "%llu / %llu\n", resync, max_sectors); |
88202a0c N |
5048 | } |
5049 | ||
750f199e N |
5050 | static struct md_sysfs_entry md_sync_completed = |
5051 | __ATTR_PREALLOC(sync_completed, S_IRUGO, sync_completed_show, NULL); | |
88202a0c | 5052 | |
5e96ee65 | 5053 | static ssize_t |
fd01b88c | 5054 | min_sync_show(struct mddev *mddev, char *page) |
5e96ee65 NB |
5055 | { |
5056 | return sprintf(page, "%llu\n", | |
5057 | (unsigned long long)mddev->resync_min); | |
5058 | } | |
5059 | static ssize_t | |
fd01b88c | 5060 | min_sync_store(struct mddev *mddev, const char *buf, size_t len) |
5e96ee65 NB |
5061 | { |
5062 | unsigned long long min; | |
23da422b | 5063 | int err; |
23da422b | 5064 | |
b29bebd6 | 5065 | if (kstrtoull(buf, 10, &min)) |
5e96ee65 | 5066 | return -EINVAL; |
23da422b N |
5067 | |
5068 | spin_lock(&mddev->lock); | |
5069 | err = -EINVAL; | |
5e96ee65 | 5070 | if (min > mddev->resync_max) |
23da422b N |
5071 | goto out_unlock; |
5072 | ||
5073 | err = -EBUSY; | |
5e96ee65 | 5074 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 5075 | goto out_unlock; |
5e96ee65 | 5076 | |
50c37b13 N |
5077 | /* Round down to multiple of 4K for safety */ |
5078 | mddev->resync_min = round_down(min, 8); | |
23da422b | 5079 | err = 0; |
5e96ee65 | 5080 | |
23da422b N |
5081 | out_unlock: |
5082 | spin_unlock(&mddev->lock); | |
5083 | return err ?: len; | |
5e96ee65 NB |
5084 | } |
5085 | ||
5086 | static struct md_sysfs_entry md_min_sync = | |
5087 | __ATTR(sync_min, S_IRUGO|S_IWUSR, min_sync_show, min_sync_store); | |
5088 | ||
c6207277 | 5089 | static ssize_t |
fd01b88c | 5090 | max_sync_show(struct mddev *mddev, char *page) |
c6207277 N |
5091 | { |
5092 | if (mddev->resync_max == MaxSector) | |
5093 | return sprintf(page, "max\n"); | |
5094 | else | |
5095 | return sprintf(page, "%llu\n", | |
5096 | (unsigned long long)mddev->resync_max); | |
5097 | } | |
5098 | static ssize_t | |
fd01b88c | 5099 | max_sync_store(struct mddev *mddev, const char *buf, size_t len) |
c6207277 | 5100 | { |
23da422b N |
5101 | int err; |
5102 | spin_lock(&mddev->lock); | |
c6207277 N |
5103 | if (strncmp(buf, "max", 3) == 0) |
5104 | mddev->resync_max = MaxSector; | |
5105 | else { | |
5e96ee65 | 5106 | unsigned long long max; |
23da422b N |
5107 | int chunk; |
5108 | ||
5109 | err = -EINVAL; | |
b29bebd6 | 5110 | if (kstrtoull(buf, 10, &max)) |
23da422b | 5111 | goto out_unlock; |
5e96ee65 | 5112 | if (max < mddev->resync_min) |
23da422b N |
5113 | goto out_unlock; |
5114 | ||
5115 | err = -EBUSY; | |
c6207277 | 5116 | if (max < mddev->resync_max && |
4d484a4a | 5117 | mddev->ro == 0 && |
c6207277 | 5118 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 5119 | goto out_unlock; |
c6207277 N |
5120 | |
5121 | /* Must be a multiple of chunk_size */ | |
23da422b N |
5122 | chunk = mddev->chunk_sectors; |
5123 | if (chunk) { | |
2ac06c33 | 5124 | sector_t temp = max; |
23da422b N |
5125 | |
5126 | err = -EINVAL; | |
5127 | if (sector_div(temp, chunk)) | |
5128 | goto out_unlock; | |
c6207277 N |
5129 | } |
5130 | mddev->resync_max = max; | |
5131 | } | |
5132 | wake_up(&mddev->recovery_wait); | |
23da422b N |
5133 | err = 0; |
5134 | out_unlock: | |
5135 | spin_unlock(&mddev->lock); | |
5136 | return err ?: len; | |
c6207277 N |
5137 | } |
5138 | ||
5139 | static struct md_sysfs_entry md_max_sync = | |
5140 | __ATTR(sync_max, S_IRUGO|S_IWUSR, max_sync_show, max_sync_store); | |
5141 | ||
e464eafd | 5142 | static ssize_t |
fd01b88c | 5143 | suspend_lo_show(struct mddev *mddev, char *page) |
e464eafd N |
5144 | { |
5145 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_lo); | |
5146 | } | |
5147 | ||
5148 | static ssize_t | |
fd01b88c | 5149 | suspend_lo_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5150 | { |
b03e0ccb | 5151 | unsigned long long new; |
6791875e | 5152 | int err; |
e464eafd | 5153 | |
4c9309c0 AD |
5154 | err = kstrtoull(buf, 10, &new); |
5155 | if (err < 0) | |
5156 | return err; | |
5157 | if (new != (sector_t)new) | |
e464eafd | 5158 | return -EINVAL; |
23ddff37 | 5159 | |
6791875e N |
5160 | err = mddev_lock(mddev); |
5161 | if (err) | |
5162 | return err; | |
5163 | err = -EINVAL; | |
5164 | if (mddev->pers == NULL || | |
5165 | mddev->pers->quiesce == NULL) | |
5166 | goto unlock; | |
b03e0ccb | 5167 | mddev_suspend(mddev); |
23ddff37 | 5168 | mddev->suspend_lo = new; |
b03e0ccb N |
5169 | mddev_resume(mddev); |
5170 | ||
6791875e N |
5171 | err = 0; |
5172 | unlock: | |
5173 | mddev_unlock(mddev); | |
5174 | return err ?: len; | |
e464eafd N |
5175 | } |
5176 | static struct md_sysfs_entry md_suspend_lo = | |
5177 | __ATTR(suspend_lo, S_IRUGO|S_IWUSR, suspend_lo_show, suspend_lo_store); | |
5178 | ||
e464eafd | 5179 | static ssize_t |
fd01b88c | 5180 | suspend_hi_show(struct mddev *mddev, char *page) |
e464eafd N |
5181 | { |
5182 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_hi); | |
5183 | } | |
5184 | ||
5185 | static ssize_t | |
fd01b88c | 5186 | suspend_hi_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5187 | { |
b03e0ccb | 5188 | unsigned long long new; |
6791875e | 5189 | int err; |
e464eafd | 5190 | |
4c9309c0 AD |
5191 | err = kstrtoull(buf, 10, &new); |
5192 | if (err < 0) | |
5193 | return err; | |
5194 | if (new != (sector_t)new) | |
e464eafd | 5195 | return -EINVAL; |
23ddff37 | 5196 | |
6791875e N |
5197 | err = mddev_lock(mddev); |
5198 | if (err) | |
5199 | return err; | |
5200 | err = -EINVAL; | |
b03e0ccb | 5201 | if (mddev->pers == NULL) |
6791875e | 5202 | goto unlock; |
b03e0ccb N |
5203 | |
5204 | mddev_suspend(mddev); | |
23ddff37 | 5205 | mddev->suspend_hi = new; |
b03e0ccb N |
5206 | mddev_resume(mddev); |
5207 | ||
6791875e N |
5208 | err = 0; |
5209 | unlock: | |
5210 | mddev_unlock(mddev); | |
5211 | return err ?: len; | |
e464eafd N |
5212 | } |
5213 | static struct md_sysfs_entry md_suspend_hi = | |
5214 | __ATTR(suspend_hi, S_IRUGO|S_IWUSR, suspend_hi_show, suspend_hi_store); | |
5215 | ||
08a02ecd | 5216 | static ssize_t |
fd01b88c | 5217 | reshape_position_show(struct mddev *mddev, char *page) |
08a02ecd N |
5218 | { |
5219 | if (mddev->reshape_position != MaxSector) | |
5220 | return sprintf(page, "%llu\n", | |
5221 | (unsigned long long)mddev->reshape_position); | |
5222 | strcpy(page, "none\n"); | |
5223 | return 5; | |
5224 | } | |
5225 | ||
5226 | static ssize_t | |
fd01b88c | 5227 | reshape_position_store(struct mddev *mddev, const char *buf, size_t len) |
08a02ecd | 5228 | { |
c6563a8c | 5229 | struct md_rdev *rdev; |
4c9309c0 | 5230 | unsigned long long new; |
6791875e | 5231 | int err; |
6791875e | 5232 | |
4c9309c0 AD |
5233 | err = kstrtoull(buf, 10, &new); |
5234 | if (err < 0) | |
5235 | return err; | |
5236 | if (new != (sector_t)new) | |
08a02ecd | 5237 | return -EINVAL; |
6791875e N |
5238 | err = mddev_lock(mddev); |
5239 | if (err) | |
5240 | return err; | |
5241 | err = -EBUSY; | |
5242 | if (mddev->pers) | |
5243 | goto unlock; | |
08a02ecd N |
5244 | mddev->reshape_position = new; |
5245 | mddev->delta_disks = 0; | |
2c810cdd | 5246 | mddev->reshape_backwards = 0; |
08a02ecd N |
5247 | mddev->new_level = mddev->level; |
5248 | mddev->new_layout = mddev->layout; | |
664e7c41 | 5249 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
c6563a8c N |
5250 | rdev_for_each(rdev, mddev) |
5251 | rdev->new_data_offset = rdev->data_offset; | |
6791875e N |
5252 | err = 0; |
5253 | unlock: | |
5254 | mddev_unlock(mddev); | |
5255 | return err ?: len; | |
08a02ecd N |
5256 | } |
5257 | ||
5258 | static struct md_sysfs_entry md_reshape_position = | |
5259 | __ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show, | |
5260 | reshape_position_store); | |
5261 | ||
2c810cdd N |
5262 | static ssize_t |
5263 | reshape_direction_show(struct mddev *mddev, char *page) | |
5264 | { | |
5265 | return sprintf(page, "%s\n", | |
5266 | mddev->reshape_backwards ? "backwards" : "forwards"); | |
5267 | } | |
5268 | ||
5269 | static ssize_t | |
5270 | reshape_direction_store(struct mddev *mddev, const char *buf, size_t len) | |
5271 | { | |
5272 | int backwards = 0; | |
6791875e N |
5273 | int err; |
5274 | ||
2c810cdd N |
5275 | if (cmd_match(buf, "forwards")) |
5276 | backwards = 0; | |
5277 | else if (cmd_match(buf, "backwards")) | |
5278 | backwards = 1; | |
5279 | else | |
5280 | return -EINVAL; | |
5281 | if (mddev->reshape_backwards == backwards) | |
5282 | return len; | |
5283 | ||
6791875e N |
5284 | err = mddev_lock(mddev); |
5285 | if (err) | |
5286 | return err; | |
2c810cdd N |
5287 | /* check if we are allowed to change */ |
5288 | if (mddev->delta_disks) | |
6791875e N |
5289 | err = -EBUSY; |
5290 | else if (mddev->persistent && | |
2c810cdd | 5291 | mddev->major_version == 0) |
6791875e N |
5292 | err = -EINVAL; |
5293 | else | |
5294 | mddev->reshape_backwards = backwards; | |
5295 | mddev_unlock(mddev); | |
5296 | return err ?: len; | |
2c810cdd N |
5297 | } |
5298 | ||
5299 | static struct md_sysfs_entry md_reshape_direction = | |
5300 | __ATTR(reshape_direction, S_IRUGO|S_IWUSR, reshape_direction_show, | |
5301 | reshape_direction_store); | |
5302 | ||
b522adcd | 5303 | static ssize_t |
fd01b88c | 5304 | array_size_show(struct mddev *mddev, char *page) |
b522adcd DW |
5305 | { |
5306 | if (mddev->external_size) | |
5307 | return sprintf(page, "%llu\n", | |
5308 | (unsigned long long)mddev->array_sectors/2); | |
5309 | else | |
5310 | return sprintf(page, "default\n"); | |
5311 | } | |
5312 | ||
5313 | static ssize_t | |
fd01b88c | 5314 | array_size_store(struct mddev *mddev, const char *buf, size_t len) |
b522adcd DW |
5315 | { |
5316 | sector_t sectors; | |
6791875e N |
5317 | int err; |
5318 | ||
5319 | err = mddev_lock(mddev); | |
5320 | if (err) | |
5321 | return err; | |
b522adcd | 5322 | |
ab5a98b1 | 5323 | /* cluster raid doesn't support change array_sectors */ |
b670883b ZL |
5324 | if (mddev_is_clustered(mddev)) { |
5325 | mddev_unlock(mddev); | |
ab5a98b1 | 5326 | return -EINVAL; |
b670883b | 5327 | } |
ab5a98b1 | 5328 | |
b522adcd DW |
5329 | if (strncmp(buf, "default", 7) == 0) { |
5330 | if (mddev->pers) | |
5331 | sectors = mddev->pers->size(mddev, 0, 0); | |
5332 | else | |
5333 | sectors = mddev->array_sectors; | |
5334 | ||
5335 | mddev->external_size = 0; | |
5336 | } else { | |
5337 | if (strict_blocks_to_sectors(buf, §ors) < 0) | |
6791875e N |
5338 | err = -EINVAL; |
5339 | else if (mddev->pers && mddev->pers->size(mddev, 0, 0) < sectors) | |
5340 | err = -E2BIG; | |
5341 | else | |
5342 | mddev->external_size = 1; | |
b522adcd DW |
5343 | } |
5344 | ||
6791875e N |
5345 | if (!err) { |
5346 | mddev->array_sectors = sectors; | |
2c247c51 CH |
5347 | if (mddev->pers) |
5348 | set_capacity_and_notify(mddev->gendisk, | |
5349 | mddev->array_sectors); | |
cbe6ef1d | 5350 | } |
6791875e N |
5351 | mddev_unlock(mddev); |
5352 | return err ?: len; | |
b522adcd DW |
5353 | } |
5354 | ||
5355 | static struct md_sysfs_entry md_array_size = | |
5356 | __ATTR(array_size, S_IRUGO|S_IWUSR, array_size_show, | |
5357 | array_size_store); | |
e464eafd | 5358 | |
664aed04 AP |
5359 | static ssize_t |
5360 | consistency_policy_show(struct mddev *mddev, char *page) | |
5361 | { | |
5362 | int ret; | |
5363 | ||
5364 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) { | |
5365 | ret = sprintf(page, "journal\n"); | |
5366 | } else if (test_bit(MD_HAS_PPL, &mddev->flags)) { | |
5367 | ret = sprintf(page, "ppl\n"); | |
5368 | } else if (mddev->bitmap) { | |
5369 | ret = sprintf(page, "bitmap\n"); | |
5370 | } else if (mddev->pers) { | |
5371 | if (mddev->pers->sync_request) | |
5372 | ret = sprintf(page, "resync\n"); | |
5373 | else | |
5374 | ret = sprintf(page, "none\n"); | |
5375 | } else { | |
5376 | ret = sprintf(page, "unknown\n"); | |
5377 | } | |
5378 | ||
5379 | return ret; | |
5380 | } | |
5381 | ||
5382 | static ssize_t | |
5383 | consistency_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5384 | { | |
ba903a3e AP |
5385 | int err = 0; |
5386 | ||
664aed04 | 5387 | if (mddev->pers) { |
ba903a3e AP |
5388 | if (mddev->pers->change_consistency_policy) |
5389 | err = mddev->pers->change_consistency_policy(mddev, buf); | |
5390 | else | |
5391 | err = -EBUSY; | |
664aed04 AP |
5392 | } else if (mddev->external && strncmp(buf, "ppl", 3) == 0) { |
5393 | set_bit(MD_HAS_PPL, &mddev->flags); | |
664aed04 | 5394 | } else { |
ba903a3e | 5395 | err = -EINVAL; |
664aed04 | 5396 | } |
ba903a3e AP |
5397 | |
5398 | return err ? err : len; | |
664aed04 AP |
5399 | } |
5400 | ||
5401 | static struct md_sysfs_entry md_consistency_policy = | |
5402 | __ATTR(consistency_policy, S_IRUGO | S_IWUSR, consistency_policy_show, | |
5403 | consistency_policy_store); | |
5404 | ||
9a567843 GJ |
5405 | static ssize_t fail_last_dev_show(struct mddev *mddev, char *page) |
5406 | { | |
5407 | return sprintf(page, "%d\n", mddev->fail_last_dev); | |
5408 | } | |
5409 | ||
5410 | /* | |
5411 | * Setting fail_last_dev to true to allow last device to be forcibly removed | |
5412 | * from RAID1/RAID10. | |
5413 | */ | |
5414 | static ssize_t | |
5415 | fail_last_dev_store(struct mddev *mddev, const char *buf, size_t len) | |
5416 | { | |
5417 | int ret; | |
5418 | bool value; | |
5419 | ||
5420 | ret = kstrtobool(buf, &value); | |
5421 | if (ret) | |
5422 | return ret; | |
5423 | ||
5424 | if (value != mddev->fail_last_dev) | |
5425 | mddev->fail_last_dev = value; | |
5426 | ||
5427 | return len; | |
5428 | } | |
5429 | static struct md_sysfs_entry md_fail_last_dev = | |
5430 | __ATTR(fail_last_dev, S_IRUGO | S_IWUSR, fail_last_dev_show, | |
5431 | fail_last_dev_store); | |
5432 | ||
3938f5fb GJ |
5433 | static ssize_t serialize_policy_show(struct mddev *mddev, char *page) |
5434 | { | |
5435 | if (mddev->pers == NULL || (mddev->pers->level != 1)) | |
5436 | return sprintf(page, "n/a\n"); | |
5437 | else | |
5438 | return sprintf(page, "%d\n", mddev->serialize_policy); | |
5439 | } | |
5440 | ||
5441 | /* | |
5442 | * Setting serialize_policy to true to enforce write IO is not reordered | |
5443 | * for raid1. | |
5444 | */ | |
5445 | static ssize_t | |
5446 | serialize_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5447 | { | |
5448 | int err; | |
5449 | bool value; | |
5450 | ||
5451 | err = kstrtobool(buf, &value); | |
5452 | if (err) | |
5453 | return err; | |
5454 | ||
5455 | if (value == mddev->serialize_policy) | |
5456 | return len; | |
5457 | ||
5458 | err = mddev_lock(mddev); | |
5459 | if (err) | |
5460 | return err; | |
5461 | if (mddev->pers == NULL || (mddev->pers->level != 1)) { | |
5462 | pr_err("md: serialize_policy is only effective for raid1\n"); | |
5463 | err = -EINVAL; | |
5464 | goto unlock; | |
5465 | } | |
5466 | ||
5467 | mddev_suspend(mddev); | |
5468 | if (value) | |
5469 | mddev_create_serial_pool(mddev, NULL, true); | |
5470 | else | |
5471 | mddev_destroy_serial_pool(mddev, NULL, true); | |
5472 | mddev->serialize_policy = value; | |
5473 | mddev_resume(mddev); | |
5474 | unlock: | |
5475 | mddev_unlock(mddev); | |
5476 | return err ?: len; | |
5477 | } | |
5478 | ||
5479 | static struct md_sysfs_entry md_serialize_policy = | |
5480 | __ATTR(serialize_policy, S_IRUGO | S_IWUSR, serialize_policy_show, | |
5481 | serialize_policy_store); | |
5482 | ||
5483 | ||
eae1701f N |
5484 | static struct attribute *md_default_attrs[] = { |
5485 | &md_level.attr, | |
d4dbd025 | 5486 | &md_layout.attr, |
eae1701f | 5487 | &md_raid_disks.attr, |
ec164d07 | 5488 | &md_uuid.attr, |
3b34380a | 5489 | &md_chunk_size.attr, |
a35b0d69 | 5490 | &md_size.attr, |
a94213b1 | 5491 | &md_resync_start.attr, |
8bb93aac | 5492 | &md_metadata.attr, |
6d7ff738 | 5493 | &md_new_device.attr, |
16f17b39 | 5494 | &md_safe_delay.attr, |
9e653b63 | 5495 | &md_array_state.attr, |
08a02ecd | 5496 | &md_reshape_position.attr, |
2c810cdd | 5497 | &md_reshape_direction.attr, |
b522adcd | 5498 | &md_array_size.attr, |
1e50915f | 5499 | &max_corr_read_errors.attr, |
664aed04 | 5500 | &md_consistency_policy.attr, |
9a567843 | 5501 | &md_fail_last_dev.attr, |
3938f5fb | 5502 | &md_serialize_policy.attr, |
411036fa N |
5503 | NULL, |
5504 | }; | |
5505 | ||
5506 | static struct attribute *md_redundancy_attrs[] = { | |
24dd469d | 5507 | &md_scan_mode.attr, |
c4a39551 | 5508 | &md_last_scan_mode.attr, |
9d88883e | 5509 | &md_mismatches.attr, |
88202a0c N |
5510 | &md_sync_min.attr, |
5511 | &md_sync_max.attr, | |
5512 | &md_sync_speed.attr, | |
90b08710 | 5513 | &md_sync_force_parallel.attr, |
88202a0c | 5514 | &md_sync_completed.attr, |
5e96ee65 | 5515 | &md_min_sync.attr, |
c6207277 | 5516 | &md_max_sync.attr, |
e464eafd N |
5517 | &md_suspend_lo.attr, |
5518 | &md_suspend_hi.attr, | |
9b1d1dac | 5519 | &md_bitmap.attr, |
d7f3d291 | 5520 | &md_degraded.attr, |
eae1701f N |
5521 | NULL, |
5522 | }; | |
c32dc040 | 5523 | static const struct attribute_group md_redundancy_group = { |
411036fa N |
5524 | .name = NULL, |
5525 | .attrs = md_redundancy_attrs, | |
5526 | }; | |
5527 | ||
eae1701f N |
5528 | static ssize_t |
5529 | md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
5530 | { | |
5531 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5532 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5533 | ssize_t rv; |
eae1701f N |
5534 | |
5535 | if (!entry->show) | |
5536 | return -EIO; | |
af8a2434 N |
5537 | spin_lock(&all_mddevs_lock); |
5538 | if (list_empty(&mddev->all_mddevs)) { | |
5539 | spin_unlock(&all_mddevs_lock); | |
5540 | return -EBUSY; | |
5541 | } | |
5542 | mddev_get(mddev); | |
5543 | spin_unlock(&all_mddevs_lock); | |
5544 | ||
b7b17c9b | 5545 | rv = entry->show(mddev, page); |
af8a2434 | 5546 | mddev_put(mddev); |
96de1e66 | 5547 | return rv; |
eae1701f N |
5548 | } |
5549 | ||
5550 | static ssize_t | |
5551 | md_attr_store(struct kobject *kobj, struct attribute *attr, | |
5552 | const char *page, size_t length) | |
5553 | { | |
5554 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5555 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5556 | ssize_t rv; |
eae1701f N |
5557 | |
5558 | if (!entry->store) | |
5559 | return -EIO; | |
67463acb N |
5560 | if (!capable(CAP_SYS_ADMIN)) |
5561 | return -EACCES; | |
af8a2434 N |
5562 | spin_lock(&all_mddevs_lock); |
5563 | if (list_empty(&mddev->all_mddevs)) { | |
5564 | spin_unlock(&all_mddevs_lock); | |
5565 | return -EBUSY; | |
5566 | } | |
5567 | mddev_get(mddev); | |
5568 | spin_unlock(&all_mddevs_lock); | |
6791875e | 5569 | rv = entry->store(mddev, page, length); |
af8a2434 | 5570 | mddev_put(mddev); |
96de1e66 | 5571 | return rv; |
eae1701f N |
5572 | } |
5573 | ||
5574 | static void md_free(struct kobject *ko) | |
5575 | { | |
fd01b88c | 5576 | struct mddev *mddev = container_of(ko, struct mddev, kobj); |
a21d1504 N |
5577 | |
5578 | if (mddev->sysfs_state) | |
5579 | sysfs_put(mddev->sysfs_state); | |
e1a86dbb JB |
5580 | if (mddev->sysfs_level) |
5581 | sysfs_put(mddev->sysfs_level); | |
5582 | ||
0f1d2e06 | 5583 | if (mddev->gendisk) { |
d8115c35 | 5584 | del_gendisk(mddev->gendisk); |
0f1d2e06 CH |
5585 | blk_cleanup_disk(mddev->gendisk); |
5586 | } | |
4ad23a97 | 5587 | percpu_ref_exit(&mddev->writes_pending); |
a21d1504 | 5588 | |
28dec870 KO |
5589 | bioset_exit(&mddev->bio_set); |
5590 | bioset_exit(&mddev->sync_set); | |
daee2024 GJ |
5591 | if (mddev->level != 1 && mddev->level != 10) |
5592 | bioset_exit(&mddev->io_acct_set); | |
eae1701f N |
5593 | kfree(mddev); |
5594 | } | |
5595 | ||
52cf25d0 | 5596 | static const struct sysfs_ops md_sysfs_ops = { |
eae1701f N |
5597 | .show = md_attr_show, |
5598 | .store = md_attr_store, | |
5599 | }; | |
5600 | static struct kobj_type md_ktype = { | |
5601 | .release = md_free, | |
5602 | .sysfs_ops = &md_sysfs_ops, | |
5603 | .default_attrs = md_default_attrs, | |
5604 | }; | |
5605 | ||
1da177e4 LT |
5606 | int mdp_major = 0; |
5607 | ||
5fd3a17e DW |
5608 | static void mddev_delayed_delete(struct work_struct *ws) |
5609 | { | |
fd01b88c | 5610 | struct mddev *mddev = container_of(ws, struct mddev, del_work); |
5fd3a17e | 5611 | |
43a70507 | 5612 | sysfs_remove_group(&mddev->kobj, &md_bitmap_group); |
5fd3a17e DW |
5613 | kobject_del(&mddev->kobj); |
5614 | kobject_put(&mddev->kobj); | |
5615 | } | |
5616 | ||
4ad23a97 N |
5617 | static void no_op(struct percpu_ref *r) {} |
5618 | ||
a415c0f1 N |
5619 | int mddev_init_writes_pending(struct mddev *mddev) |
5620 | { | |
5621 | if (mddev->writes_pending.percpu_count_ptr) | |
5622 | return 0; | |
ddde2af7 RG |
5623 | if (percpu_ref_init(&mddev->writes_pending, no_op, |
5624 | PERCPU_REF_ALLOW_REINIT, GFP_KERNEL) < 0) | |
a415c0f1 N |
5625 | return -ENOMEM; |
5626 | /* We want to start with the refcount at zero */ | |
5627 | percpu_ref_put(&mddev->writes_pending); | |
5628 | return 0; | |
5629 | } | |
5630 | EXPORT_SYMBOL_GPL(mddev_init_writes_pending); | |
5631 | ||
efeb53c0 | 5632 | static int md_alloc(dev_t dev, char *name) |
1da177e4 | 5633 | { |
039b7225 N |
5634 | /* |
5635 | * If dev is zero, name is the name of a device to allocate with | |
5636 | * an arbitrary minor number. It will be "md_???" | |
5637 | * If dev is non-zero it must be a device number with a MAJOR of | |
5638 | * MD_MAJOR or mdp_major. In this case, if "name" is NULL, then | |
5639 | * the device is being created by opening a node in /dev. | |
5640 | * If "name" is not NULL, the device is being created by | |
5641 | * writing to /sys/module/md_mod/parameters/new_array. | |
5642 | */ | |
48c9c27b | 5643 | static DEFINE_MUTEX(disks_mutex); |
0d809b38 | 5644 | struct mddev *mddev; |
1da177e4 | 5645 | struct gendisk *disk; |
efeb53c0 N |
5646 | int partitioned; |
5647 | int shift; | |
5648 | int unit; | |
0d809b38 | 5649 | int error ; |
efeb53c0 | 5650 | |
0d809b38 CH |
5651 | /* |
5652 | * Wait for any previous instance of this device to be completely | |
5653 | * removed (mddev_delayed_delete). | |
d3374825 | 5654 | */ |
e804ac78 | 5655 | flush_workqueue(md_misc_wq); |
d3374825 | 5656 | |
48c9c27b | 5657 | mutex_lock(&disks_mutex); |
0d809b38 CH |
5658 | mddev = mddev_alloc(dev); |
5659 | if (IS_ERR(mddev)) { | |
5660 | mutex_unlock(&disks_mutex); | |
5661 | return PTR_ERR(mddev); | |
5662 | } | |
5663 | ||
5664 | partitioned = (MAJOR(mddev->unit) != MD_MAJOR); | |
5665 | shift = partitioned ? MdpMinorShift : 0; | |
5666 | unit = MINOR(mddev->unit) >> shift; | |
efeb53c0 | 5667 | |
039b7225 | 5668 | if (name && !dev) { |
efeb53c0 N |
5669 | /* Need to ensure that 'name' is not a duplicate. |
5670 | */ | |
fd01b88c | 5671 | struct mddev *mddev2; |
efeb53c0 N |
5672 | spin_lock(&all_mddevs_lock); |
5673 | ||
5674 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) | |
5675 | if (mddev2->gendisk && | |
5676 | strcmp(mddev2->gendisk->disk_name, name) == 0) { | |
5677 | spin_unlock(&all_mddevs_lock); | |
0d809b38 | 5678 | error = -EEXIST; |
0909dc44 | 5679 | goto abort; |
efeb53c0 N |
5680 | } |
5681 | spin_unlock(&all_mddevs_lock); | |
1da177e4 | 5682 | } |
039b7225 N |
5683 | if (name && dev) |
5684 | /* | |
5685 | * Creating /dev/mdNNN via "newarray", so adjust hold_active. | |
5686 | */ | |
5687 | mddev->hold_active = UNTIL_STOP; | |
8b765398 | 5688 | |
0909dc44 | 5689 | error = -ENOMEM; |
0f1d2e06 CH |
5690 | disk = blk_alloc_disk(NUMA_NO_NODE); |
5691 | if (!disk) | |
0909dc44 | 5692 | goto abort; |
409c57f3 | 5693 | |
efeb53c0 | 5694 | disk->major = MAJOR(mddev->unit); |
1da177e4 | 5695 | disk->first_minor = unit << shift; |
0f1d2e06 | 5696 | disk->minors = 1 << shift; |
efeb53c0 N |
5697 | if (name) |
5698 | strcpy(disk->disk_name, name); | |
5699 | else if (partitioned) | |
1da177e4 | 5700 | sprintf(disk->disk_name, "md_d%d", unit); |
ce7b0f46 | 5701 | else |
1da177e4 | 5702 | sprintf(disk->disk_name, "md%d", unit); |
1da177e4 LT |
5703 | disk->fops = &md_fops; |
5704 | disk->private_data = mddev; | |
0f1d2e06 CH |
5705 | |
5706 | mddev->queue = disk->queue; | |
5707 | blk_set_stacking_limits(&mddev->queue->limits); | |
56883a7e | 5708 | blk_queue_write_cache(mddev->queue, true, true); |
92850bbd | 5709 | /* Allow extended partitions. This makes the |
d3374825 | 5710 | * 'mdp' device redundant, but we can't really |
92850bbd N |
5711 | * remove it now. |
5712 | */ | |
5713 | disk->flags |= GENHD_FL_EXT_DEVT; | |
a564e23f | 5714 | disk->events |= DISK_EVENT_MEDIA_CHANGE; |
1da177e4 | 5715 | mddev->gendisk = disk; |
b0140891 N |
5716 | add_disk(disk); |
5717 | ||
28dec870 | 5718 | error = kobject_add(&mddev->kobj, &disk_to_dev(disk)->kobj, "%s", "md"); |
0909dc44 N |
5719 | if (error) { |
5720 | /* This isn't possible, but as kobject_init_and_add is marked | |
5721 | * __must_check, we must do something with the result | |
5722 | */ | |
9d48739e N |
5723 | pr_debug("md: cannot register %s/md - name in use\n", |
5724 | disk->disk_name); | |
0909dc44 N |
5725 | error = 0; |
5726 | } | |
00bcb4ac N |
5727 | if (mddev->kobj.sd && |
5728 | sysfs_create_group(&mddev->kobj, &md_bitmap_group)) | |
9d48739e | 5729 | pr_debug("pointless warning\n"); |
0909dc44 N |
5730 | abort: |
5731 | mutex_unlock(&disks_mutex); | |
00bcb4ac | 5732 | if (!error && mddev->kobj.sd) { |
3830c62f | 5733 | kobject_uevent(&mddev->kobj, KOBJ_ADD); |
00bcb4ac | 5734 | mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state"); |
e1a86dbb | 5735 | mddev->sysfs_level = sysfs_get_dirent_safe(mddev->kobj.sd, "level"); |
b62b7590 | 5736 | } |
d3374825 | 5737 | mddev_put(mddev); |
0909dc44 | 5738 | return error; |
efeb53c0 N |
5739 | } |
5740 | ||
28144f99 | 5741 | static void md_probe(dev_t dev) |
efeb53c0 | 5742 | { |
28144f99 CH |
5743 | if (MAJOR(dev) == MD_MAJOR && MINOR(dev) >= 512) |
5744 | return; | |
78b6350d N |
5745 | if (create_on_open) |
5746 | md_alloc(dev, NULL); | |
1da177e4 LT |
5747 | } |
5748 | ||
e4dca7b7 | 5749 | static int add_named_array(const char *val, const struct kernel_param *kp) |
efeb53c0 | 5750 | { |
039b7225 N |
5751 | /* |
5752 | * val must be "md_*" or "mdNNN". | |
5753 | * For "md_*" we allocate an array with a large free minor number, and | |
efeb53c0 | 5754 | * set the name to val. val must not already be an active name. |
039b7225 N |
5755 | * For "mdNNN" we allocate an array with the minor number NNN |
5756 | * which must not already be in use. | |
efeb53c0 N |
5757 | */ |
5758 | int len = strlen(val); | |
5759 | char buf[DISK_NAME_LEN]; | |
039b7225 | 5760 | unsigned long devnum; |
efeb53c0 N |
5761 | |
5762 | while (len && val[len-1] == '\n') | |
5763 | len--; | |
5764 | if (len >= DISK_NAME_LEN) | |
5765 | return -E2BIG; | |
5766 | strlcpy(buf, val, len+1); | |
039b7225 N |
5767 | if (strncmp(buf, "md_", 3) == 0) |
5768 | return md_alloc(0, buf); | |
5769 | if (strncmp(buf, "md", 2) == 0 && | |
5770 | isdigit(buf[2]) && | |
5771 | kstrtoul(buf+2, 10, &devnum) == 0 && | |
5772 | devnum <= MINORMASK) | |
5773 | return md_alloc(MKDEV(MD_MAJOR, devnum), NULL); | |
5774 | ||
5775 | return -EINVAL; | |
efeb53c0 N |
5776 | } |
5777 | ||
8376d3c1 | 5778 | static void md_safemode_timeout(struct timer_list *t) |
1da177e4 | 5779 | { |
8376d3c1 | 5780 | struct mddev *mddev = from_timer(mddev, t, safemode_timer); |
1da177e4 | 5781 | |
4ad23a97 N |
5782 | mddev->safemode = 1; |
5783 | if (mddev->external) | |
5784 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
5785 | ||
1da177e4 LT |
5786 | md_wakeup_thread(mddev->thread); |
5787 | } | |
5788 | ||
6ff8d8ec | 5789 | static int start_dirty_degraded; |
1da177e4 | 5790 | |
fd01b88c | 5791 | int md_run(struct mddev *mddev) |
1da177e4 | 5792 | { |
2604b703 | 5793 | int err; |
3cb03002 | 5794 | struct md_rdev *rdev; |
84fc4b56 | 5795 | struct md_personality *pers; |
1da177e4 | 5796 | |
a757e64c N |
5797 | if (list_empty(&mddev->disks)) |
5798 | /* cannot run an array with no devices.. */ | |
1da177e4 | 5799 | return -EINVAL; |
1da177e4 LT |
5800 | |
5801 | if (mddev->pers) | |
5802 | return -EBUSY; | |
bb4f1e9d N |
5803 | /* Cannot run until previous stop completes properly */ |
5804 | if (mddev->sysfs_active) | |
5805 | return -EBUSY; | |
b6eb127d | 5806 | |
1da177e4 LT |
5807 | /* |
5808 | * Analyze all RAID superblock(s) | |
5809 | */ | |
1ec4a939 N |
5810 | if (!mddev->raid_disks) { |
5811 | if (!mddev->persistent) | |
5812 | return -EINVAL; | |
6a5cb53a YY |
5813 | err = analyze_sbs(mddev); |
5814 | if (err) | |
5815 | return -EINVAL; | |
1ec4a939 | 5816 | } |
1da177e4 | 5817 | |
d9d166c2 N |
5818 | if (mddev->level != LEVEL_NONE) |
5819 | request_module("md-level-%d", mddev->level); | |
5820 | else if (mddev->clevel[0]) | |
5821 | request_module("md-%s", mddev->clevel); | |
1da177e4 LT |
5822 | |
5823 | /* | |
5824 | * Drop all container device buffers, from now on | |
5825 | * the only valid external interface is through the md | |
5826 | * device. | |
1da177e4 | 5827 | */ |
4b6c1060 | 5828 | mddev->has_superblocks = false; |
dafb20fa | 5829 | rdev_for_each(rdev, mddev) { |
b2d444d7 | 5830 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
5831 | continue; |
5832 | sync_blockdev(rdev->bdev); | |
f98393a6 | 5833 | invalidate_bdev(rdev->bdev); |
d7a47838 | 5834 | if (mddev->ro != 1 && rdev_read_only(rdev)) { |
97b20ef7 N |
5835 | mddev->ro = 1; |
5836 | if (mddev->gendisk) | |
5837 | set_disk_ro(mddev->gendisk, 1); | |
5838 | } | |
f0d76d70 | 5839 | |
4b6c1060 HM |
5840 | if (rdev->sb_page) |
5841 | mddev->has_superblocks = true; | |
5842 | ||
f0d76d70 N |
5843 | /* perform some consistency tests on the device. |
5844 | * We don't want the data to overlap the metadata, | |
58c0fed4 | 5845 | * Internal Bitmap issues have been handled elsewhere. |
f0d76d70 | 5846 | */ |
a6ff7e08 JB |
5847 | if (rdev->meta_bdev) { |
5848 | /* Nothing to check */; | |
5849 | } else if (rdev->data_offset < rdev->sb_start) { | |
58c0fed4 AN |
5850 | if (mddev->dev_sectors && |
5851 | rdev->data_offset + mddev->dev_sectors | |
0f420358 | 5852 | > rdev->sb_start) { |
9d48739e N |
5853 | pr_warn("md: %s: data overlaps metadata\n", |
5854 | mdname(mddev)); | |
f0d76d70 N |
5855 | return -EINVAL; |
5856 | } | |
5857 | } else { | |
0f420358 | 5858 | if (rdev->sb_start + rdev->sb_size/512 |
f0d76d70 | 5859 | > rdev->data_offset) { |
9d48739e N |
5860 | pr_warn("md: %s: metadata overlaps data\n", |
5861 | mdname(mddev)); | |
f0d76d70 N |
5862 | return -EINVAL; |
5863 | } | |
5864 | } | |
00bcb4ac | 5865 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
5866 | } |
5867 | ||
afeee514 KO |
5868 | if (!bioset_initialized(&mddev->bio_set)) { |
5869 | err = bioset_init(&mddev->bio_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5870 | if (err) | |
5871 | return err; | |
10273170 | 5872 | } |
afeee514 KO |
5873 | if (!bioset_initialized(&mddev->sync_set)) { |
5874 | err = bioset_init(&mddev->sync_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5875 | if (err) | |
10764815 GJ |
5876 | goto exit_bio_set; |
5877 | } | |
a167f663 | 5878 | |
1da177e4 | 5879 | spin_lock(&pers_lock); |
d9d166c2 | 5880 | pers = find_pers(mddev->level, mddev->clevel); |
2604b703 | 5881 | if (!pers || !try_module_get(pers->owner)) { |
1da177e4 | 5882 | spin_unlock(&pers_lock); |
d9d166c2 | 5883 | if (mddev->level != LEVEL_NONE) |
9d48739e N |
5884 | pr_warn("md: personality for level %d is not loaded!\n", |
5885 | mddev->level); | |
d9d166c2 | 5886 | else |
9d48739e N |
5887 | pr_warn("md: personality for level %s is not loaded!\n", |
5888 | mddev->clevel); | |
bfc9dfdc SL |
5889 | err = -EINVAL; |
5890 | goto abort; | |
1da177e4 | 5891 | } |
1da177e4 | 5892 | spin_unlock(&pers_lock); |
34817e8c N |
5893 | if (mddev->level != pers->level) { |
5894 | mddev->level = pers->level; | |
5895 | mddev->new_level = pers->level; | |
5896 | } | |
d9d166c2 | 5897 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
1da177e4 | 5898 | |
f6705578 | 5899 | if (mddev->reshape_position != MaxSector && |
63c70c4f | 5900 | pers->start_reshape == NULL) { |
f6705578 | 5901 | /* This personality cannot handle reshaping... */ |
f6705578 | 5902 | module_put(pers->owner); |
bfc9dfdc SL |
5903 | err = -EINVAL; |
5904 | goto abort; | |
f6705578 N |
5905 | } |
5906 | ||
7dd5e7c3 N |
5907 | if (pers->sync_request) { |
5908 | /* Warn if this is a potentially silly | |
5909 | * configuration. | |
5910 | */ | |
5911 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 5912 | struct md_rdev *rdev2; |
7dd5e7c3 | 5913 | int warned = 0; |
159ec1fc | 5914 | |
dafb20fa N |
5915 | rdev_for_each(rdev, mddev) |
5916 | rdev_for_each(rdev2, mddev) { | |
7dd5e7c3 | 5917 | if (rdev < rdev2 && |
61a27e1f CH |
5918 | rdev->bdev->bd_disk == |
5919 | rdev2->bdev->bd_disk) { | |
9d48739e N |
5920 | pr_warn("%s: WARNING: %s appears to be on the same physical disk as %s.\n", |
5921 | mdname(mddev), | |
5922 | bdevname(rdev->bdev,b), | |
5923 | bdevname(rdev2->bdev,b2)); | |
7dd5e7c3 N |
5924 | warned = 1; |
5925 | } | |
5926 | } | |
159ec1fc | 5927 | |
7dd5e7c3 | 5928 | if (warned) |
9d48739e | 5929 | pr_warn("True protection against single-disk failure might be compromised.\n"); |
7dd5e7c3 N |
5930 | } |
5931 | ||
657390d2 | 5932 | mddev->recovery = 0; |
58c0fed4 AN |
5933 | /* may be over-ridden by personality */ |
5934 | mddev->resync_max_sectors = mddev->dev_sectors; | |
5935 | ||
6ff8d8ec | 5936 | mddev->ok_start_degraded = start_dirty_degraded; |
1da177e4 | 5937 | |
0f9552b5 | 5938 | if (start_readonly && mddev->ro == 0) |
f91de92e N |
5939 | mddev->ro = 2; /* read-only, but switch on first write */ |
5940 | ||
36d091f4 | 5941 | err = pers->run(mddev); |
13e53df3 | 5942 | if (err) |
9d48739e | 5943 | pr_warn("md: pers->run() failed ...\n"); |
36d091f4 | 5944 | else if (pers->size(mddev, 0, 0) < mddev->array_sectors) { |
9d48739e N |
5945 | WARN_ONCE(!mddev->external_size, |
5946 | "%s: default size too small, but 'external_size' not in effect?\n", | |
5947 | __func__); | |
5948 | pr_warn("md: invalid array_size %llu > default size %llu\n", | |
5949 | (unsigned long long)mddev->array_sectors / 2, | |
5950 | (unsigned long long)pers->size(mddev, 0, 0) / 2); | |
b522adcd | 5951 | err = -EINVAL; |
b522adcd | 5952 | } |
36d091f4 | 5953 | if (err == 0 && pers->sync_request && |
ef99bf48 | 5954 | (mddev->bitmap_info.file || mddev->bitmap_info.offset)) { |
f9209a32 GR |
5955 | struct bitmap *bitmap; |
5956 | ||
e64e4018 | 5957 | bitmap = md_bitmap_create(mddev, -1); |
f9209a32 GR |
5958 | if (IS_ERR(bitmap)) { |
5959 | err = PTR_ERR(bitmap); | |
9d48739e N |
5960 | pr_warn("%s: failed to create bitmap (%d)\n", |
5961 | mdname(mddev), err); | |
f9209a32 GR |
5962 | } else |
5963 | mddev->bitmap = bitmap; | |
5964 | ||
b15c2e57 | 5965 | } |
d494549a GJ |
5966 | if (err) |
5967 | goto bitmap_abort; | |
3e148a32 GJ |
5968 | |
5969 | if (mddev->bitmap_info.max_write_behind > 0) { | |
3e173ab5 | 5970 | bool create_pool = false; |
3e148a32 GJ |
5971 | |
5972 | rdev_for_each(rdev, mddev) { | |
5973 | if (test_bit(WriteMostly, &rdev->flags) && | |
404659cf | 5974 | rdev_init_serial(rdev)) |
3e173ab5 | 5975 | create_pool = true; |
3e148a32 | 5976 | } |
3e173ab5 | 5977 | if (create_pool && mddev->serial_info_pool == NULL) { |
404659cf GJ |
5978 | mddev->serial_info_pool = |
5979 | mempool_create_kmalloc_pool(NR_SERIAL_INFOS, | |
5980 | sizeof(struct serial_info)); | |
5981 | if (!mddev->serial_info_pool) { | |
3e148a32 | 5982 | err = -ENOMEM; |
d494549a | 5983 | goto bitmap_abort; |
3e148a32 GJ |
5984 | } |
5985 | } | |
5986 | } | |
5987 | ||
5c675f83 | 5988 | if (mddev->queue) { |
bb086a89 SL |
5989 | bool nonrot = true; |
5990 | ||
5991 | rdev_for_each(rdev, mddev) { | |
5992 | if (rdev->raid_disk >= 0 && | |
5993 | !blk_queue_nonrot(bdev_get_queue(rdev->bdev))) { | |
5994 | nonrot = false; | |
5995 | break; | |
5996 | } | |
5997 | } | |
5998 | if (mddev->degraded) | |
5999 | nonrot = false; | |
6000 | if (nonrot) | |
8b904b5b | 6001 | blk_queue_flag_set(QUEUE_FLAG_NONROT, mddev->queue); |
bb086a89 | 6002 | else |
8b904b5b | 6003 | blk_queue_flag_clear(QUEUE_FLAG_NONROT, mddev->queue); |
10764815 | 6004 | blk_queue_flag_set(QUEUE_FLAG_IO_STAT, mddev->queue); |
5c675f83 | 6005 | } |
36d091f4 | 6006 | if (pers->sync_request) { |
00bcb4ac N |
6007 | if (mddev->kobj.sd && |
6008 | sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
6009 | pr_warn("md: cannot register extra attributes for %s\n", |
6010 | mdname(mddev)); | |
00bcb4ac | 6011 | mddev->sysfs_action = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_action"); |
e8efa9b8 JB |
6012 | mddev->sysfs_completed = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_completed"); |
6013 | mddev->sysfs_degraded = sysfs_get_dirent_safe(mddev->kobj.sd, "degraded"); | |
5e55e2f5 | 6014 | } else if (mddev->ro == 2) /* auto-readonly not meaningful */ |
fd9d49ca N |
6015 | mddev->ro = 0; |
6016 | ||
1e50915f RB |
6017 | atomic_set(&mddev->max_corr_read_errors, |
6018 | MD_DEFAULT_MAX_CORRECTED_READ_ERRORS); | |
1da177e4 | 6019 | mddev->safemode = 0; |
28c1b9fd GR |
6020 | if (mddev_is_clustered(mddev)) |
6021 | mddev->safemode_delay = 0; | |
6022 | else | |
7c9d5c54 | 6023 | mddev->safemode_delay = DEFAULT_SAFEMODE_DELAY; |
1da177e4 | 6024 | mddev->in_sync = 1; |
0ca69886 | 6025 | smp_wmb(); |
36d091f4 N |
6026 | spin_lock(&mddev->lock); |
6027 | mddev->pers = pers; | |
36d091f4 | 6028 | spin_unlock(&mddev->lock); |
dafb20fa | 6029 | rdev_for_each(rdev, mddev) |
36fad858 | 6030 | if (rdev->raid_disk >= 0) |
e5b521ee | 6031 | sysfs_link_rdev(mddev, rdev); /* failure here is OK */ |
f72ffdd6 | 6032 | |
a4a3d26d N |
6033 | if (mddev->degraded && !mddev->ro) |
6034 | /* This ensures that recovering status is reported immediately | |
6035 | * via sysfs - until a lack of spares is confirmed. | |
6036 | */ | |
6037 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
1da177e4 | 6038 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f72ffdd6 | 6039 | |
2953079c | 6040 | if (mddev->sb_flags) |
850b2b42 | 6041 | md_update_sb(mddev, 0); |
1da177e4 | 6042 | |
d7603b7e | 6043 | md_new_event(mddev); |
1da177e4 | 6044 | return 0; |
b126194c | 6045 | |
d494549a GJ |
6046 | bitmap_abort: |
6047 | mddev_detach(mddev); | |
6048 | if (mddev->private) | |
6049 | pers->free(mddev, mddev->private); | |
6050 | mddev->private = NULL; | |
6051 | module_put(pers->owner); | |
6052 | md_bitmap_destroy(mddev); | |
b126194c | 6053 | abort: |
4bc034d3 | 6054 | bioset_exit(&mddev->sync_set); |
10764815 GJ |
6055 | exit_bio_set: |
6056 | bioset_exit(&mddev->bio_set); | |
b126194c | 6057 | return err; |
1da177e4 | 6058 | } |
390ee602 | 6059 | EXPORT_SYMBOL_GPL(md_run); |
1da177e4 | 6060 | |
7e0adbfc | 6061 | int do_md_run(struct mddev *mddev) |
fe60b014 N |
6062 | { |
6063 | int err; | |
6064 | ||
9d4b45d6 | 6065 | set_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
6066 | err = md_run(mddev); |
6067 | if (err) | |
6068 | goto out; | |
e64e4018 | 6069 | err = md_bitmap_load(mddev); |
69e51b44 | 6070 | if (err) { |
e64e4018 | 6071 | md_bitmap_destroy(mddev); |
69e51b44 N |
6072 | goto out; |
6073 | } | |
0fd018af | 6074 | |
28c1b9fd GR |
6075 | if (mddev_is_clustered(mddev)) |
6076 | md_allow_write(mddev); | |
6077 | ||
d5d885fd SL |
6078 | /* run start up tasks that require md_thread */ |
6079 | md_start(mddev); | |
6080 | ||
0fd018af JB |
6081 | md_wakeup_thread(mddev->thread); |
6082 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
6083 | ||
2c247c51 | 6084 | set_capacity_and_notify(mddev->gendisk, mddev->array_sectors); |
9d4b45d6 | 6085 | clear_bit(MD_NOT_READY, &mddev->flags); |
f0b4f7e2 | 6086 | mddev->changed = 1; |
fe60b014 | 6087 | kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); |
9d4b45d6 N |
6088 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6089 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
e1a86dbb | 6090 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
fe60b014 | 6091 | out: |
9d4b45d6 | 6092 | clear_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
6093 | return err; |
6094 | } | |
6095 | ||
d5d885fd SL |
6096 | int md_start(struct mddev *mddev) |
6097 | { | |
6098 | int ret = 0; | |
6099 | ||
6100 | if (mddev->pers->start) { | |
6101 | set_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
6102 | md_wakeup_thread(mddev->thread); | |
6103 | ret = mddev->pers->start(mddev); | |
6104 | clear_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
6105 | md_wakeup_thread(mddev->sync_thread); | |
6106 | } | |
6107 | return ret; | |
6108 | } | |
6109 | EXPORT_SYMBOL_GPL(md_start); | |
6110 | ||
fd01b88c | 6111 | static int restart_array(struct mddev *mddev) |
1da177e4 LT |
6112 | { |
6113 | struct gendisk *disk = mddev->gendisk; | |
97b20ef7 N |
6114 | struct md_rdev *rdev; |
6115 | bool has_journal = false; | |
6116 | bool has_readonly = false; | |
1da177e4 | 6117 | |
80fab1d7 | 6118 | /* Complain if it has no devices */ |
1da177e4 | 6119 | if (list_empty(&mddev->disks)) |
80fab1d7 AN |
6120 | return -ENXIO; |
6121 | if (!mddev->pers) | |
6122 | return -EINVAL; | |
6123 | if (!mddev->ro) | |
6124 | return -EBUSY; | |
339421de | 6125 | |
97b20ef7 N |
6126 | rcu_read_lock(); |
6127 | rdev_for_each_rcu(rdev, mddev) { | |
6128 | if (test_bit(Journal, &rdev->flags) && | |
6129 | !test_bit(Faulty, &rdev->flags)) | |
6130 | has_journal = true; | |
a42e0d70 | 6131 | if (rdev_read_only(rdev)) |
97b20ef7 N |
6132 | has_readonly = true; |
6133 | } | |
6134 | rcu_read_unlock(); | |
6135 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags) && !has_journal) | |
339421de | 6136 | /* Don't restart rw with journal missing/faulty */ |
339421de | 6137 | return -EINVAL; |
97b20ef7 N |
6138 | if (has_readonly) |
6139 | return -EROFS; | |
339421de | 6140 | |
80fab1d7 AN |
6141 | mddev->safemode = 0; |
6142 | mddev->ro = 0; | |
6143 | set_disk_ro(disk, 0); | |
9d48739e | 6144 | pr_debug("md: %s switched to read-write mode.\n", mdname(mddev)); |
80fab1d7 AN |
6145 | /* Kick recovery or resync if necessary */ |
6146 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6147 | md_wakeup_thread(mddev->thread); | |
6148 | md_wakeup_thread(mddev->sync_thread); | |
00bcb4ac | 6149 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
80fab1d7 | 6150 | return 0; |
1da177e4 LT |
6151 | } |
6152 | ||
fd01b88c | 6153 | static void md_clean(struct mddev *mddev) |
6177b472 N |
6154 | { |
6155 | mddev->array_sectors = 0; | |
6156 | mddev->external_size = 0; | |
6157 | mddev->dev_sectors = 0; | |
6158 | mddev->raid_disks = 0; | |
6159 | mddev->recovery_cp = 0; | |
6160 | mddev->resync_min = 0; | |
6161 | mddev->resync_max = MaxSector; | |
6162 | mddev->reshape_position = MaxSector; | |
6163 | mddev->external = 0; | |
6164 | mddev->persistent = 0; | |
6165 | mddev->level = LEVEL_NONE; | |
6166 | mddev->clevel[0] = 0; | |
6167 | mddev->flags = 0; | |
2953079c | 6168 | mddev->sb_flags = 0; |
6177b472 N |
6169 | mddev->ro = 0; |
6170 | mddev->metadata_type[0] = 0; | |
6171 | mddev->chunk_sectors = 0; | |
6172 | mddev->ctime = mddev->utime = 0; | |
6173 | mddev->layout = 0; | |
6174 | mddev->max_disks = 0; | |
6175 | mddev->events = 0; | |
a8707c08 | 6176 | mddev->can_decrease_events = 0; |
6177b472 | 6177 | mddev->delta_disks = 0; |
2c810cdd | 6178 | mddev->reshape_backwards = 0; |
6177b472 N |
6179 | mddev->new_level = LEVEL_NONE; |
6180 | mddev->new_layout = 0; | |
6181 | mddev->new_chunk_sectors = 0; | |
6182 | mddev->curr_resync = 0; | |
7f7583d4 | 6183 | atomic64_set(&mddev->resync_mismatches, 0); |
6177b472 N |
6184 | mddev->suspend_lo = mddev->suspend_hi = 0; |
6185 | mddev->sync_speed_min = mddev->sync_speed_max = 0; | |
6186 | mddev->recovery = 0; | |
6187 | mddev->in_sync = 0; | |
f0b4f7e2 | 6188 | mddev->changed = 0; |
6177b472 | 6189 | mddev->degraded = 0; |
6177b472 | 6190 | mddev->safemode = 0; |
bd691922 | 6191 | mddev->private = NULL; |
c20c33f0 | 6192 | mddev->cluster_info = NULL; |
6177b472 N |
6193 | mddev->bitmap_info.offset = 0; |
6194 | mddev->bitmap_info.default_offset = 0; | |
6409bb05 | 6195 | mddev->bitmap_info.default_space = 0; |
6177b472 N |
6196 | mddev->bitmap_info.chunksize = 0; |
6197 | mddev->bitmap_info.daemon_sleep = 0; | |
6198 | mddev->bitmap_info.max_write_behind = 0; | |
c20c33f0 | 6199 | mddev->bitmap_info.nodes = 0; |
6177b472 N |
6200 | } |
6201 | ||
fd01b88c | 6202 | static void __md_stop_writes(struct mddev *mddev) |
a047e125 | 6203 | { |
6b6204ee | 6204 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
21e0958e GJ |
6205 | if (work_pending(&mddev->del_work)) |
6206 | flush_workqueue(md_misc_wq); | |
a047e125 | 6207 | if (mddev->sync_thread) { |
a047e125 | 6208 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
a91d5ac0 | 6209 | md_reap_sync_thread(mddev); |
a047e125 N |
6210 | } |
6211 | ||
6212 | del_timer_sync(&mddev->safemode_timer); | |
6213 | ||
034e33f5 SL |
6214 | if (mddev->pers && mddev->pers->quiesce) { |
6215 | mddev->pers->quiesce(mddev, 1); | |
6216 | mddev->pers->quiesce(mddev, 0); | |
6217 | } | |
e64e4018 | 6218 | md_bitmap_flush(mddev); |
a047e125 | 6219 | |
b6d428c6 | 6220 | if (mddev->ro == 0 && |
28c1b9fd | 6221 | ((!mddev->in_sync && !mddev_is_clustered(mddev)) || |
2953079c | 6222 | mddev->sb_flags)) { |
a047e125 | 6223 | /* mark array as shutdown cleanly */ |
28c1b9fd GR |
6224 | if (!mddev_is_clustered(mddev)) |
6225 | mddev->in_sync = 1; | |
a047e125 N |
6226 | md_update_sb(mddev, 1); |
6227 | } | |
69b00b5b GJ |
6228 | /* disable policy to guarantee rdevs free resources for serialization */ |
6229 | mddev->serialize_policy = 0; | |
6230 | mddev_destroy_serial_pool(mddev, NULL, true); | |
a047e125 | 6231 | } |
defad61a | 6232 | |
fd01b88c | 6233 | void md_stop_writes(struct mddev *mddev) |
defad61a | 6234 | { |
29f097c4 | 6235 | mddev_lock_nointr(mddev); |
defad61a N |
6236 | __md_stop_writes(mddev); |
6237 | mddev_unlock(mddev); | |
6238 | } | |
390ee602 | 6239 | EXPORT_SYMBOL_GPL(md_stop_writes); |
a047e125 | 6240 | |
5aa61f42 N |
6241 | static void mddev_detach(struct mddev *mddev) |
6242 | { | |
e64e4018 | 6243 | md_bitmap_wait_behind_writes(mddev); |
6b40bec3 | 6244 | if (mddev->pers && mddev->pers->quiesce && !mddev->suspended) { |
5aa61f42 N |
6245 | mddev->pers->quiesce(mddev, 1); |
6246 | mddev->pers->quiesce(mddev, 0); | |
6247 | } | |
6248 | md_unregister_thread(&mddev->thread); | |
6249 | if (mddev->queue) | |
6250 | blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ | |
6251 | } | |
6252 | ||
5eff3c43 | 6253 | static void __md_stop(struct mddev *mddev) |
6177b472 | 6254 | { |
36d091f4 | 6255 | struct md_personality *pers = mddev->pers; |
e64e4018 | 6256 | md_bitmap_destroy(mddev); |
5aa61f42 | 6257 | mddev_detach(mddev); |
ee5d004f | 6258 | /* Ensure ->event_work is done */ |
21e0958e GJ |
6259 | if (mddev->event_work.func) |
6260 | flush_workqueue(md_misc_wq); | |
36d091f4 | 6261 | spin_lock(&mddev->lock); |
6177b472 | 6262 | mddev->pers = NULL; |
36d091f4 N |
6263 | spin_unlock(&mddev->lock); |
6264 | pers->free(mddev, mddev->private); | |
bd691922 | 6265 | mddev->private = NULL; |
36d091f4 N |
6266 | if (pers->sync_request && mddev->to_remove == NULL) |
6267 | mddev->to_remove = &md_redundancy_group; | |
6268 | module_put(pers->owner); | |
cca9cf90 | 6269 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
6aaa58c9 JW |
6270 | } |
6271 | ||
6272 | void md_stop(struct mddev *mddev) | |
6273 | { | |
6274 | /* stop the array and free an attached data structures. | |
6275 | * This is called from dm-raid | |
6276 | */ | |
6277 | __md_stop(mddev); | |
afeee514 KO |
6278 | bioset_exit(&mddev->bio_set); |
6279 | bioset_exit(&mddev->sync_set); | |
daee2024 GJ |
6280 | if (mddev->level != 1 && mddev->level != 10) |
6281 | bioset_exit(&mddev->io_acct_set); | |
5eff3c43 N |
6282 | } |
6283 | ||
390ee602 | 6284 | EXPORT_SYMBOL_GPL(md_stop); |
6177b472 | 6285 | |
a05b7ea0 | 6286 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) |
a4bd82d0 N |
6287 | { |
6288 | int err = 0; | |
30b8feb7 N |
6289 | int did_freeze = 0; |
6290 | ||
6291 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6292 | did_freeze = 1; | |
6293 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6294 | md_wakeup_thread(mddev->thread); | |
6295 | } | |
f851b60d | 6296 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6297 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6298 | if (mddev->sync_thread) |
30b8feb7 N |
6299 | /* Thread might be blocked waiting for metadata update |
6300 | * which will now never happen */ | |
6301 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6302 | |
2953079c | 6303 | if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
88724bfa | 6304 | return -EBUSY; |
30b8feb7 | 6305 | mddev_unlock(mddev); |
f851b60d N |
6306 | wait_event(resync_wait, !test_bit(MD_RECOVERY_RUNNING, |
6307 | &mddev->recovery)); | |
88724bfa | 6308 | wait_event(mddev->sb_wait, |
2953079c | 6309 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
30b8feb7 N |
6310 | mddev_lock_nointr(mddev); |
6311 | ||
a4bd82d0 | 6312 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6313 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 | 6314 | mddev->sync_thread || |
af8d8e6f | 6315 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6316 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
30b8feb7 N |
6317 | if (did_freeze) { |
6318 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6319 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6320 | md_wakeup_thread(mddev->thread); |
6321 | } | |
a4bd82d0 N |
6322 | err = -EBUSY; |
6323 | goto out; | |
6324 | } | |
6325 | if (mddev->pers) { | |
defad61a | 6326 | __md_stop_writes(mddev); |
a4bd82d0 N |
6327 | |
6328 | err = -ENXIO; | |
6329 | if (mddev->ro==1) | |
6330 | goto out; | |
6331 | mddev->ro = 1; | |
6332 | set_disk_ro(mddev->gendisk, 1); | |
6333 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d N |
6334 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
6335 | md_wakeup_thread(mddev->thread); | |
00bcb4ac | 6336 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
30b8feb7 | 6337 | err = 0; |
a4bd82d0 N |
6338 | } |
6339 | out: | |
6340 | mutex_unlock(&mddev->open_mutex); | |
6341 | return err; | |
6342 | } | |
6343 | ||
9e653b63 N |
6344 | /* mode: |
6345 | * 0 - completely stop and dis-assemble array | |
9e653b63 N |
6346 | * 2 - stop but do not disassemble array |
6347 | */ | |
f72ffdd6 | 6348 | static int do_md_stop(struct mddev *mddev, int mode, |
a05b7ea0 | 6349 | struct block_device *bdev) |
1da177e4 | 6350 | { |
1da177e4 | 6351 | struct gendisk *disk = mddev->gendisk; |
3cb03002 | 6352 | struct md_rdev *rdev; |
30b8feb7 N |
6353 | int did_freeze = 0; |
6354 | ||
6355 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6356 | did_freeze = 1; | |
6357 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6358 | md_wakeup_thread(mddev->thread); | |
6359 | } | |
f851b60d | 6360 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6361 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6362 | if (mddev->sync_thread) |
30b8feb7 N |
6363 | /* Thread might be blocked waiting for metadata update |
6364 | * which will now never happen */ | |
6365 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6366 | |
30b8feb7 | 6367 | mddev_unlock(mddev); |
f851b60d N |
6368 | wait_event(resync_wait, (mddev->sync_thread == NULL && |
6369 | !test_bit(MD_RECOVERY_RUNNING, | |
6370 | &mddev->recovery))); | |
30b8feb7 | 6371 | mddev_lock_nointr(mddev); |
1da177e4 | 6372 | |
c8c00a69 | 6373 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6374 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 N |
6375 | mddev->sysfs_active || |
6376 | mddev->sync_thread || | |
af8d8e6f | 6377 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6378 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
6e17b027 | 6379 | mutex_unlock(&mddev->open_mutex); |
30b8feb7 N |
6380 | if (did_freeze) { |
6381 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6382 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6383 | md_wakeup_thread(mddev->thread); |
6384 | } | |
260fa034 N |
6385 | return -EBUSY; |
6386 | } | |
6e17b027 | 6387 | if (mddev->pers) { |
a4bd82d0 N |
6388 | if (mddev->ro) |
6389 | set_disk_ro(disk, 0); | |
409c57f3 | 6390 | |
defad61a | 6391 | __md_stop_writes(mddev); |
5eff3c43 | 6392 | __md_stop(mddev); |
6177b472 | 6393 | |
a4bd82d0 | 6394 | /* tell userspace to handle 'inactive' */ |
00bcb4ac | 6395 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0d4ca600 | 6396 | |
dafb20fa | 6397 | rdev_for_each(rdev, mddev) |
36fad858 NK |
6398 | if (rdev->raid_disk >= 0) |
6399 | sysfs_unlink_rdev(mddev, rdev); | |
c4647292 | 6400 | |
2c247c51 | 6401 | set_capacity_and_notify(disk, 0); |
6e17b027 | 6402 | mutex_unlock(&mddev->open_mutex); |
f0b4f7e2 | 6403 | mddev->changed = 1; |
0d4ca600 | 6404 | |
a4bd82d0 N |
6405 | if (mddev->ro) |
6406 | mddev->ro = 0; | |
6e17b027 N |
6407 | } else |
6408 | mutex_unlock(&mddev->open_mutex); | |
1da177e4 LT |
6409 | /* |
6410 | * Free resources if final stop | |
6411 | */ | |
9e653b63 | 6412 | if (mode == 0) { |
9d48739e | 6413 | pr_info("md: %s stopped.\n", mdname(mddev)); |
1da177e4 | 6414 | |
c3d9714e | 6415 | if (mddev->bitmap_info.file) { |
4af1a041 N |
6416 | struct file *f = mddev->bitmap_info.file; |
6417 | spin_lock(&mddev->lock); | |
c3d9714e | 6418 | mddev->bitmap_info.file = NULL; |
4af1a041 N |
6419 | spin_unlock(&mddev->lock); |
6420 | fput(f); | |
978f946b | 6421 | } |
c3d9714e | 6422 | mddev->bitmap_info.offset = 0; |
978f946b | 6423 | |
1da177e4 LT |
6424 | export_array(mddev); |
6425 | ||
6177b472 | 6426 | md_clean(mddev); |
efeb53c0 N |
6427 | if (mddev->hold_active == UNTIL_STOP) |
6428 | mddev->hold_active = 0; | |
a4bd82d0 | 6429 | } |
d7603b7e | 6430 | md_new_event(mddev); |
00bcb4ac | 6431 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6e17b027 | 6432 | return 0; |
1da177e4 LT |
6433 | } |
6434 | ||
fdee8ae4 | 6435 | #ifndef MODULE |
fd01b88c | 6436 | static void autorun_array(struct mddev *mddev) |
1da177e4 | 6437 | { |
3cb03002 | 6438 | struct md_rdev *rdev; |
1da177e4 LT |
6439 | int err; |
6440 | ||
a757e64c | 6441 | if (list_empty(&mddev->disks)) |
1da177e4 | 6442 | return; |
1da177e4 | 6443 | |
9d48739e | 6444 | pr_info("md: running: "); |
1da177e4 | 6445 | |
dafb20fa | 6446 | rdev_for_each(rdev, mddev) { |
1da177e4 | 6447 | char b[BDEVNAME_SIZE]; |
9d48739e | 6448 | pr_cont("<%s>", bdevname(rdev->bdev,b)); |
1da177e4 | 6449 | } |
9d48739e | 6450 | pr_cont("\n"); |
1da177e4 | 6451 | |
d710e138 | 6452 | err = do_md_run(mddev); |
1da177e4 | 6453 | if (err) { |
9d48739e | 6454 | pr_warn("md: do_md_run() returned %d\n", err); |
a05b7ea0 | 6455 | do_md_stop(mddev, 0, NULL); |
1da177e4 LT |
6456 | } |
6457 | } | |
6458 | ||
6459 | /* | |
6460 | * lets try to run arrays based on all disks that have arrived | |
6461 | * until now. (those are in pending_raid_disks) | |
6462 | * | |
6463 | * the method: pick the first pending disk, collect all disks with | |
6464 | * the same UUID, remove all from the pending list and put them into | |
6465 | * the 'same_array' list. Then order this list based on superblock | |
6466 | * update time (freshest comes first), kick out 'old' disks and | |
6467 | * compare superblocks. If everything's fine then run it. | |
6468 | * | |
6469 | * If "unit" is allocated, then bump its reference count | |
6470 | */ | |
6471 | static void autorun_devices(int part) | |
6472 | { | |
3cb03002 | 6473 | struct md_rdev *rdev0, *rdev, *tmp; |
fd01b88c | 6474 | struct mddev *mddev; |
1da177e4 LT |
6475 | char b[BDEVNAME_SIZE]; |
6476 | ||
9d48739e | 6477 | pr_info("md: autorun ...\n"); |
1da177e4 | 6478 | while (!list_empty(&pending_raid_disks)) { |
e8703fe1 | 6479 | int unit; |
1da177e4 | 6480 | dev_t dev; |
ad01c9e3 | 6481 | LIST_HEAD(candidates); |
1da177e4 | 6482 | rdev0 = list_entry(pending_raid_disks.next, |
3cb03002 | 6483 | struct md_rdev, same_set); |
1da177e4 | 6484 | |
9d48739e | 6485 | pr_debug("md: considering %s ...\n", bdevname(rdev0->bdev,b)); |
1da177e4 | 6486 | INIT_LIST_HEAD(&candidates); |
159ec1fc | 6487 | rdev_for_each_list(rdev, tmp, &pending_raid_disks) |
1da177e4 | 6488 | if (super_90_load(rdev, rdev0, 0) >= 0) { |
9d48739e N |
6489 | pr_debug("md: adding %s ...\n", |
6490 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
6491 | list_move(&rdev->same_set, &candidates); |
6492 | } | |
6493 | /* | |
6494 | * now we have a set of devices, with all of them having | |
6495 | * mostly sane superblocks. It's time to allocate the | |
6496 | * mddev. | |
6497 | */ | |
e8703fe1 N |
6498 | if (part) { |
6499 | dev = MKDEV(mdp_major, | |
6500 | rdev0->preferred_minor << MdpMinorShift); | |
6501 | unit = MINOR(dev) >> MdpMinorShift; | |
6502 | } else { | |
6503 | dev = MKDEV(MD_MAJOR, rdev0->preferred_minor); | |
6504 | unit = MINOR(dev); | |
6505 | } | |
6506 | if (rdev0->preferred_minor != unit) { | |
9d48739e N |
6507 | pr_warn("md: unit number in %s is bad: %d\n", |
6508 | bdevname(rdev0->bdev, b), rdev0->preferred_minor); | |
1da177e4 LT |
6509 | break; |
6510 | } | |
1da177e4 | 6511 | |
28144f99 | 6512 | md_probe(dev); |
1da177e4 | 6513 | mddev = mddev_find(dev); |
65aa97c4 | 6514 | if (!mddev) |
1da177e4 | 6515 | break; |
65aa97c4 | 6516 | |
f72ffdd6 | 6517 | if (mddev_lock(mddev)) |
9d48739e | 6518 | pr_warn("md: %s locked, cannot run\n", mdname(mddev)); |
1da177e4 LT |
6519 | else if (mddev->raid_disks || mddev->major_version |
6520 | || !list_empty(&mddev->disks)) { | |
9d48739e | 6521 | pr_warn("md: %s already running, cannot run %s\n", |
1da177e4 LT |
6522 | mdname(mddev), bdevname(rdev0->bdev,b)); |
6523 | mddev_unlock(mddev); | |
6524 | } else { | |
9d48739e | 6525 | pr_debug("md: created %s\n", mdname(mddev)); |
1ec4a939 | 6526 | mddev->persistent = 1; |
159ec1fc | 6527 | rdev_for_each_list(rdev, tmp, &candidates) { |
1da177e4 LT |
6528 | list_del_init(&rdev->same_set); |
6529 | if (bind_rdev_to_array(rdev, mddev)) | |
6530 | export_rdev(rdev); | |
6531 | } | |
6532 | autorun_array(mddev); | |
6533 | mddev_unlock(mddev); | |
6534 | } | |
6535 | /* on success, candidates will be empty, on error | |
6536 | * it won't... | |
6537 | */ | |
159ec1fc | 6538 | rdev_for_each_list(rdev, tmp, &candidates) { |
4b80991c | 6539 | list_del_init(&rdev->same_set); |
1da177e4 | 6540 | export_rdev(rdev); |
4b80991c | 6541 | } |
1da177e4 LT |
6542 | mddev_put(mddev); |
6543 | } | |
9d48739e | 6544 | pr_info("md: ... autorun DONE.\n"); |
1da177e4 | 6545 | } |
fdee8ae4 | 6546 | #endif /* !MODULE */ |
1da177e4 | 6547 | |
f72ffdd6 | 6548 | static int get_version(void __user *arg) |
1da177e4 LT |
6549 | { |
6550 | mdu_version_t ver; | |
6551 | ||
6552 | ver.major = MD_MAJOR_VERSION; | |
6553 | ver.minor = MD_MINOR_VERSION; | |
6554 | ver.patchlevel = MD_PATCHLEVEL_VERSION; | |
6555 | ||
6556 | if (copy_to_user(arg, &ver, sizeof(ver))) | |
6557 | return -EFAULT; | |
6558 | ||
6559 | return 0; | |
6560 | } | |
6561 | ||
f72ffdd6 | 6562 | static int get_array_info(struct mddev *mddev, void __user *arg) |
1da177e4 LT |
6563 | { |
6564 | mdu_array_info_t info; | |
a9f326eb | 6565 | int nr,working,insync,failed,spare; |
3cb03002 | 6566 | struct md_rdev *rdev; |
1da177e4 | 6567 | |
1ca69c4b N |
6568 | nr = working = insync = failed = spare = 0; |
6569 | rcu_read_lock(); | |
6570 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 6571 | nr++; |
b2d444d7 | 6572 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
6573 | failed++; |
6574 | else { | |
6575 | working++; | |
b2d444d7 | 6576 | if (test_bit(In_sync, &rdev->flags)) |
f72ffdd6 | 6577 | insync++; |
b347af81 SL |
6578 | else if (test_bit(Journal, &rdev->flags)) |
6579 | /* TODO: add journal count to md_u.h */ | |
6580 | ; | |
1da177e4 LT |
6581 | else |
6582 | spare++; | |
6583 | } | |
6584 | } | |
1ca69c4b | 6585 | rcu_read_unlock(); |
1da177e4 LT |
6586 | |
6587 | info.major_version = mddev->major_version; | |
6588 | info.minor_version = mddev->minor_version; | |
6589 | info.patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6590 | info.ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 6591 | info.level = mddev->level; |
58c0fed4 AN |
6592 | info.size = mddev->dev_sectors / 2; |
6593 | if (info.size != mddev->dev_sectors / 2) /* overflow */ | |
284ae7ca | 6594 | info.size = -1; |
1da177e4 LT |
6595 | info.nr_disks = nr; |
6596 | info.raid_disks = mddev->raid_disks; | |
6597 | info.md_minor = mddev->md_minor; | |
6598 | info.not_persistent= !mddev->persistent; | |
6599 | ||
9ebc6ef1 | 6600 | info.utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
6601 | info.state = 0; |
6602 | if (mddev->in_sync) | |
6603 | info.state = (1<<MD_SB_CLEAN); | |
c3d9714e | 6604 | if (mddev->bitmap && mddev->bitmap_info.offset) |
9bd35920 | 6605 | info.state |= (1<<MD_SB_BITMAP_PRESENT); |
ca8895d9 GR |
6606 | if (mddev_is_clustered(mddev)) |
6607 | info.state |= (1<<MD_SB_CLUSTERED); | |
a9f326eb | 6608 | info.active_disks = insync; |
1da177e4 LT |
6609 | info.working_disks = working; |
6610 | info.failed_disks = failed; | |
6611 | info.spare_disks = spare; | |
6612 | ||
6613 | info.layout = mddev->layout; | |
9d8f0363 | 6614 | info.chunk_size = mddev->chunk_sectors << 9; |
1da177e4 LT |
6615 | |
6616 | if (copy_to_user(arg, &info, sizeof(info))) | |
6617 | return -EFAULT; | |
6618 | ||
6619 | return 0; | |
6620 | } | |
6621 | ||
f72ffdd6 | 6622 | static int get_bitmap_file(struct mddev *mddev, void __user * arg) |
32a7627c N |
6623 | { |
6624 | mdu_bitmap_file_t *file = NULL; /* too big for stack allocation */ | |
f4ad3d38 | 6625 | char *ptr; |
4af1a041 | 6626 | int err; |
32a7627c | 6627 | |
b6878d9e | 6628 | file = kzalloc(sizeof(*file), GFP_NOIO); |
32a7627c | 6629 | if (!file) |
4af1a041 | 6630 | return -ENOMEM; |
32a7627c | 6631 | |
4af1a041 N |
6632 | err = 0; |
6633 | spin_lock(&mddev->lock); | |
25eafe1a BR |
6634 | /* bitmap enabled */ |
6635 | if (mddev->bitmap_info.file) { | |
6636 | ptr = file_path(mddev->bitmap_info.file, file->pathname, | |
6637 | sizeof(file->pathname)); | |
6638 | if (IS_ERR(ptr)) | |
6639 | err = PTR_ERR(ptr); | |
6640 | else | |
6641 | memmove(file->pathname, ptr, | |
6642 | sizeof(file->pathname)-(ptr-file->pathname)); | |
6643 | } | |
4af1a041 | 6644 | spin_unlock(&mddev->lock); |
32a7627c | 6645 | |
4af1a041 N |
6646 | if (err == 0 && |
6647 | copy_to_user(arg, file, sizeof(*file))) | |
32a7627c | 6648 | err = -EFAULT; |
4af1a041 | 6649 | |
32a7627c N |
6650 | kfree(file); |
6651 | return err; | |
6652 | } | |
6653 | ||
f72ffdd6 | 6654 | static int get_disk_info(struct mddev *mddev, void __user * arg) |
1da177e4 LT |
6655 | { |
6656 | mdu_disk_info_t info; | |
3cb03002 | 6657 | struct md_rdev *rdev; |
1da177e4 LT |
6658 | |
6659 | if (copy_from_user(&info, arg, sizeof(info))) | |
6660 | return -EFAULT; | |
6661 | ||
1ca69c4b | 6662 | rcu_read_lock(); |
57d051dc | 6663 | rdev = md_find_rdev_nr_rcu(mddev, info.number); |
1da177e4 LT |
6664 | if (rdev) { |
6665 | info.major = MAJOR(rdev->bdev->bd_dev); | |
6666 | info.minor = MINOR(rdev->bdev->bd_dev); | |
6667 | info.raid_disk = rdev->raid_disk; | |
6668 | info.state = 0; | |
b2d444d7 | 6669 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 6670 | info.state |= (1<<MD_DISK_FAULTY); |
b2d444d7 | 6671 | else if (test_bit(In_sync, &rdev->flags)) { |
1da177e4 LT |
6672 | info.state |= (1<<MD_DISK_ACTIVE); |
6673 | info.state |= (1<<MD_DISK_SYNC); | |
6674 | } | |
9efdca16 | 6675 | if (test_bit(Journal, &rdev->flags)) |
bac624f3 | 6676 | info.state |= (1<<MD_DISK_JOURNAL); |
8ddf9efe N |
6677 | if (test_bit(WriteMostly, &rdev->flags)) |
6678 | info.state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
6679 | if (test_bit(FailFast, &rdev->flags)) |
6680 | info.state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 LT |
6681 | } else { |
6682 | info.major = info.minor = 0; | |
6683 | info.raid_disk = -1; | |
6684 | info.state = (1<<MD_DISK_REMOVED); | |
6685 | } | |
1ca69c4b | 6686 | rcu_read_unlock(); |
1da177e4 LT |
6687 | |
6688 | if (copy_to_user(arg, &info, sizeof(info))) | |
6689 | return -EFAULT; | |
6690 | ||
6691 | return 0; | |
6692 | } | |
6693 | ||
7e0adbfc | 6694 | int md_add_new_disk(struct mddev *mddev, struct mdu_disk_info_s *info) |
1da177e4 LT |
6695 | { |
6696 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 6697 | struct md_rdev *rdev; |
1da177e4 LT |
6698 | dev_t dev = MKDEV(info->major,info->minor); |
6699 | ||
1aee41f6 GR |
6700 | if (mddev_is_clustered(mddev) && |
6701 | !(info->state & ((1 << MD_DISK_CLUSTER_ADD) | (1 << MD_DISK_CANDIDATE)))) { | |
9d48739e N |
6702 | pr_warn("%s: Cannot add to clustered mddev.\n", |
6703 | mdname(mddev)); | |
1aee41f6 GR |
6704 | return -EINVAL; |
6705 | } | |
6706 | ||
1da177e4 LT |
6707 | if (info->major != MAJOR(dev) || info->minor != MINOR(dev)) |
6708 | return -EOVERFLOW; | |
6709 | ||
6710 | if (!mddev->raid_disks) { | |
6711 | int err; | |
6712 | /* expecting a device which has a superblock */ | |
6713 | rdev = md_import_device(dev, mddev->major_version, mddev->minor_version); | |
6714 | if (IS_ERR(rdev)) { | |
9d48739e | 6715 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6716 | PTR_ERR(rdev)); |
6717 | return PTR_ERR(rdev); | |
6718 | } | |
6719 | if (!list_empty(&mddev->disks)) { | |
3cb03002 N |
6720 | struct md_rdev *rdev0 |
6721 | = list_entry(mddev->disks.next, | |
6722 | struct md_rdev, same_set); | |
a9f326eb | 6723 | err = super_types[mddev->major_version] |
1da177e4 LT |
6724 | .load_super(rdev, rdev0, mddev->minor_version); |
6725 | if (err < 0) { | |
9d48739e | 6726 | pr_warn("md: %s has different UUID to %s\n", |
f72ffdd6 | 6727 | bdevname(rdev->bdev,b), |
1da177e4 LT |
6728 | bdevname(rdev0->bdev,b2)); |
6729 | export_rdev(rdev); | |
6730 | return -EINVAL; | |
6731 | } | |
6732 | } | |
6733 | err = bind_rdev_to_array(rdev, mddev); | |
6734 | if (err) | |
6735 | export_rdev(rdev); | |
6736 | return err; | |
6737 | } | |
6738 | ||
6739 | /* | |
7e0adbfc | 6740 | * md_add_new_disk can be used once the array is assembled |
1da177e4 LT |
6741 | * to add "hot spares". They must already have a superblock |
6742 | * written | |
6743 | */ | |
6744 | if (mddev->pers) { | |
6745 | int err; | |
6746 | if (!mddev->pers->hot_add_disk) { | |
9d48739e N |
6747 | pr_warn("%s: personality does not support diskops!\n", |
6748 | mdname(mddev)); | |
1da177e4 LT |
6749 | return -EINVAL; |
6750 | } | |
7b1e35f6 N |
6751 | if (mddev->persistent) |
6752 | rdev = md_import_device(dev, mddev->major_version, | |
6753 | mddev->minor_version); | |
6754 | else | |
6755 | rdev = md_import_device(dev, -1, -1); | |
1da177e4 | 6756 | if (IS_ERR(rdev)) { |
9d48739e | 6757 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6758 | PTR_ERR(rdev)); |
6759 | return PTR_ERR(rdev); | |
6760 | } | |
1a855a06 | 6761 | /* set saved_raid_disk if appropriate */ |
41158c7e N |
6762 | if (!mddev->persistent) { |
6763 | if (info->state & (1<<MD_DISK_SYNC) && | |
bf572541 | 6764 | info->raid_disk < mddev->raid_disks) { |
41158c7e | 6765 | rdev->raid_disk = info->raid_disk; |
bf572541 | 6766 | set_bit(In_sync, &rdev->flags); |
8313b8e5 | 6767 | clear_bit(Bitmap_sync, &rdev->flags); |
bf572541 | 6768 | } else |
41158c7e | 6769 | rdev->raid_disk = -1; |
f466722c | 6770 | rdev->saved_raid_disk = rdev->raid_disk; |
41158c7e N |
6771 | } else |
6772 | super_types[mddev->major_version]. | |
6773 | validate_super(mddev, rdev); | |
bedd86b7 | 6774 | if ((info->state & (1<<MD_DISK_SYNC)) && |
f4563091 | 6775 | rdev->raid_disk != info->raid_disk) { |
bedd86b7 N |
6776 | /* This was a hot-add request, but events doesn't |
6777 | * match, so reject it. | |
6778 | */ | |
6779 | export_rdev(rdev); | |
6780 | return -EINVAL; | |
6781 | } | |
6782 | ||
b2d444d7 | 6783 | clear_bit(In_sync, &rdev->flags); /* just to be sure */ |
8ddf9efe N |
6784 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6785 | set_bit(WriteMostly, &rdev->flags); | |
575a80fa N |
6786 | else |
6787 | clear_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6788 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6789 | set_bit(FailFast, &rdev->flags); | |
6790 | else | |
6791 | clear_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6792 | |
f6b6ec5c SL |
6793 | if (info->state & (1<<MD_DISK_JOURNAL)) { |
6794 | struct md_rdev *rdev2; | |
6795 | bool has_journal = false; | |
6796 | ||
6797 | /* make sure no existing journal disk */ | |
6798 | rdev_for_each(rdev2, mddev) { | |
6799 | if (test_bit(Journal, &rdev2->flags)) { | |
6800 | has_journal = true; | |
6801 | break; | |
6802 | } | |
6803 | } | |
230b55fa | 6804 | if (has_journal || mddev->bitmap) { |
f6b6ec5c SL |
6805 | export_rdev(rdev); |
6806 | return -EBUSY; | |
6807 | } | |
bac624f3 | 6808 | set_bit(Journal, &rdev->flags); |
f6b6ec5c | 6809 | } |
1aee41f6 GR |
6810 | /* |
6811 | * check whether the device shows up in other nodes | |
6812 | */ | |
6813 | if (mddev_is_clustered(mddev)) { | |
dbb64f86 | 6814 | if (info->state & (1 << MD_DISK_CANDIDATE)) |
1aee41f6 | 6815 | set_bit(Candidate, &rdev->flags); |
dbb64f86 | 6816 | else if (info->state & (1 << MD_DISK_CLUSTER_ADD)) { |
1aee41f6 | 6817 | /* --add initiated by this node */ |
dbb64f86 | 6818 | err = md_cluster_ops->add_new_disk(mddev, rdev); |
1aee41f6 | 6819 | if (err) { |
1aee41f6 GR |
6820 | export_rdev(rdev); |
6821 | return err; | |
6822 | } | |
6823 | } | |
6824 | } | |
6825 | ||
1da177e4 LT |
6826 | rdev->raid_disk = -1; |
6827 | err = bind_rdev_to_array(rdev, mddev); | |
dbb64f86 | 6828 | |
1da177e4 LT |
6829 | if (err) |
6830 | export_rdev(rdev); | |
dbb64f86 GR |
6831 | |
6832 | if (mddev_is_clustered(mddev)) { | |
e566aef1 GJ |
6833 | if (info->state & (1 << MD_DISK_CANDIDATE)) { |
6834 | if (!err) { | |
6835 | err = md_cluster_ops->new_disk_ack(mddev, | |
6836 | err == 0); | |
6837 | if (err) | |
6838 | md_kick_rdev_from_array(rdev); | |
6839 | } | |
6840 | } else { | |
dbb64f86 GR |
6841 | if (err) |
6842 | md_cluster_ops->add_new_disk_cancel(mddev); | |
6843 | else | |
6844 | err = add_bound_rdev(rdev); | |
6845 | } | |
6846 | ||
6847 | } else if (!err) | |
a6da4ef8 | 6848 | err = add_bound_rdev(rdev); |
dbb64f86 | 6849 | |
1da177e4 LT |
6850 | return err; |
6851 | } | |
6852 | ||
7e0adbfc | 6853 | /* otherwise, md_add_new_disk is only allowed |
1da177e4 LT |
6854 | * for major_version==0 superblocks |
6855 | */ | |
6856 | if (mddev->major_version != 0) { | |
9d48739e | 6857 | pr_warn("%s: ADD_NEW_DISK not supported\n", mdname(mddev)); |
1da177e4 LT |
6858 | return -EINVAL; |
6859 | } | |
6860 | ||
6861 | if (!(info->state & (1<<MD_DISK_FAULTY))) { | |
6862 | int err; | |
d710e138 | 6863 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6864 | if (IS_ERR(rdev)) { |
9d48739e | 6865 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6866 | PTR_ERR(rdev)); |
6867 | return PTR_ERR(rdev); | |
6868 | } | |
6869 | rdev->desc_nr = info->number; | |
6870 | if (info->raid_disk < mddev->raid_disks) | |
6871 | rdev->raid_disk = info->raid_disk; | |
6872 | else | |
6873 | rdev->raid_disk = -1; | |
6874 | ||
1da177e4 | 6875 | if (rdev->raid_disk < mddev->raid_disks) |
b2d444d7 N |
6876 | if (info->state & (1<<MD_DISK_SYNC)) |
6877 | set_bit(In_sync, &rdev->flags); | |
1da177e4 | 6878 | |
8ddf9efe N |
6879 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6880 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6881 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6882 | set_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6883 | |
1da177e4 | 6884 | if (!mddev->persistent) { |
9d48739e | 6885 | pr_debug("md: nonpersistent superblock ...\n"); |
77304d2a MS |
6886 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
6887 | } else | |
57b2caa3 | 6888 | rdev->sb_start = calc_dev_sboffset(rdev); |
8190e754 | 6889 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6890 | |
2bf071bf N |
6891 | err = bind_rdev_to_array(rdev, mddev); |
6892 | if (err) { | |
6893 | export_rdev(rdev); | |
6894 | return err; | |
6895 | } | |
1da177e4 LT |
6896 | } |
6897 | ||
6898 | return 0; | |
6899 | } | |
6900 | ||
f72ffdd6 | 6901 | static int hot_remove_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6902 | { |
6903 | char b[BDEVNAME_SIZE]; | |
3cb03002 | 6904 | struct md_rdev *rdev; |
1da177e4 | 6905 | |
c42a0e26 YY |
6906 | if (!mddev->pers) |
6907 | return -ENODEV; | |
6908 | ||
1da177e4 LT |
6909 | rdev = find_rdev(mddev, dev); |
6910 | if (!rdev) | |
6911 | return -ENXIO; | |
6912 | ||
2910ff17 GR |
6913 | if (rdev->raid_disk < 0) |
6914 | goto kick_rdev; | |
293467aa | 6915 | |
3ea8929d N |
6916 | clear_bit(Blocked, &rdev->flags); |
6917 | remove_and_add_spares(mddev, rdev); | |
6918 | ||
1da177e4 LT |
6919 | if (rdev->raid_disk >= 0) |
6920 | goto busy; | |
6921 | ||
2910ff17 | 6922 | kick_rdev: |
bca5b065 ZH |
6923 | if (mddev_is_clustered(mddev)) { |
6924 | if (md_cluster_ops->remove_disk(mddev, rdev)) | |
6925 | goto busy; | |
6926 | } | |
88bcfef7 | 6927 | |
fb56dfef | 6928 | md_kick_rdev_from_array(rdev); |
2953079c | 6929 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6930 | if (mddev->thread) |
6931 | md_wakeup_thread(mddev->thread); | |
6932 | else | |
6933 | md_update_sb(mddev, 1); | |
d7603b7e | 6934 | md_new_event(mddev); |
1da177e4 LT |
6935 | |
6936 | return 0; | |
6937 | busy: | |
9d48739e N |
6938 | pr_debug("md: cannot remove active disk %s from %s ...\n", |
6939 | bdevname(rdev->bdev,b), mdname(mddev)); | |
1da177e4 LT |
6940 | return -EBUSY; |
6941 | } | |
6942 | ||
f72ffdd6 | 6943 | static int hot_add_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6944 | { |
6945 | char b[BDEVNAME_SIZE]; | |
6946 | int err; | |
3cb03002 | 6947 | struct md_rdev *rdev; |
1da177e4 LT |
6948 | |
6949 | if (!mddev->pers) | |
6950 | return -ENODEV; | |
6951 | ||
6952 | if (mddev->major_version != 0) { | |
9d48739e | 6953 | pr_warn("%s: HOT_ADD may only be used with version-0 superblocks.\n", |
1da177e4 LT |
6954 | mdname(mddev)); |
6955 | return -EINVAL; | |
6956 | } | |
6957 | if (!mddev->pers->hot_add_disk) { | |
9d48739e | 6958 | pr_warn("%s: personality does not support diskops!\n", |
1da177e4 LT |
6959 | mdname(mddev)); |
6960 | return -EINVAL; | |
6961 | } | |
6962 | ||
d710e138 | 6963 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6964 | if (IS_ERR(rdev)) { |
9d48739e | 6965 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6966 | PTR_ERR(rdev)); |
6967 | return -EINVAL; | |
6968 | } | |
6969 | ||
6970 | if (mddev->persistent) | |
57b2caa3 | 6971 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 6972 | else |
77304d2a | 6973 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
1da177e4 | 6974 | |
8190e754 | 6975 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6976 | |
b2d444d7 | 6977 | if (test_bit(Faulty, &rdev->flags)) { |
9d48739e | 6978 | pr_warn("md: can not hot-add faulty %s disk to %s!\n", |
1da177e4 LT |
6979 | bdevname(rdev->bdev,b), mdname(mddev)); |
6980 | err = -EINVAL; | |
6981 | goto abort_export; | |
6982 | } | |
293467aa | 6983 | |
b2d444d7 | 6984 | clear_bit(In_sync, &rdev->flags); |
1da177e4 | 6985 | rdev->desc_nr = -1; |
5842730d | 6986 | rdev->saved_raid_disk = -1; |
2bf071bf N |
6987 | err = bind_rdev_to_array(rdev, mddev); |
6988 | if (err) | |
2aa82191 | 6989 | goto abort_export; |
1da177e4 LT |
6990 | |
6991 | /* | |
6992 | * The rest should better be atomic, we can have disk failures | |
6993 | * noticed in interrupt contexts ... | |
6994 | */ | |
6995 | ||
1da177e4 LT |
6996 | rdev->raid_disk = -1; |
6997 | ||
2953079c | 6998 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6999 | if (!mddev->thread) |
7000 | md_update_sb(mddev, 1); | |
1da177e4 LT |
7001 | /* |
7002 | * Kick recovery, maybe this spare has to be added to the | |
7003 | * array immediately. | |
7004 | */ | |
7005 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7006 | md_wakeup_thread(mddev->thread); | |
d7603b7e | 7007 | md_new_event(mddev); |
1da177e4 LT |
7008 | return 0; |
7009 | ||
1da177e4 LT |
7010 | abort_export: |
7011 | export_rdev(rdev); | |
7012 | return err; | |
7013 | } | |
7014 | ||
fd01b88c | 7015 | static int set_bitmap_file(struct mddev *mddev, int fd) |
32a7627c | 7016 | { |
035328c2 | 7017 | int err = 0; |
32a7627c | 7018 | |
36fa3063 | 7019 | if (mddev->pers) { |
d66b1b39 | 7020 | if (!mddev->pers->quiesce || !mddev->thread) |
36fa3063 N |
7021 | return -EBUSY; |
7022 | if (mddev->recovery || mddev->sync_thread) | |
7023 | return -EBUSY; | |
7024 | /* we should be able to change the bitmap.. */ | |
7025 | } | |
32a7627c | 7026 | |
36fa3063 | 7027 | if (fd >= 0) { |
035328c2 | 7028 | struct inode *inode; |
1e594bb2 N |
7029 | struct file *f; |
7030 | ||
7031 | if (mddev->bitmap || mddev->bitmap_info.file) | |
36fa3063 | 7032 | return -EEXIST; /* cannot add when bitmap is present */ |
1e594bb2 | 7033 | f = fget(fd); |
32a7627c | 7034 | |
1e594bb2 | 7035 | if (f == NULL) { |
9d48739e N |
7036 | pr_warn("%s: error: failed to get bitmap file\n", |
7037 | mdname(mddev)); | |
36fa3063 N |
7038 | return -EBADF; |
7039 | } | |
7040 | ||
1e594bb2 | 7041 | inode = f->f_mapping->host; |
035328c2 | 7042 | if (!S_ISREG(inode->i_mode)) { |
9d48739e N |
7043 | pr_warn("%s: error: bitmap file must be a regular file\n", |
7044 | mdname(mddev)); | |
035328c2 | 7045 | err = -EBADF; |
1e594bb2 | 7046 | } else if (!(f->f_mode & FMODE_WRITE)) { |
9d48739e N |
7047 | pr_warn("%s: error: bitmap file must open for write\n", |
7048 | mdname(mddev)); | |
035328c2 N |
7049 | err = -EBADF; |
7050 | } else if (atomic_read(&inode->i_writecount) != 1) { | |
9d48739e N |
7051 | pr_warn("%s: error: bitmap file is already in use\n", |
7052 | mdname(mddev)); | |
035328c2 N |
7053 | err = -EBUSY; |
7054 | } | |
7055 | if (err) { | |
1e594bb2 | 7056 | fput(f); |
36fa3063 N |
7057 | return err; |
7058 | } | |
1e594bb2 | 7059 | mddev->bitmap_info.file = f; |
c3d9714e | 7060 | mddev->bitmap_info.offset = 0; /* file overrides offset */ |
36fa3063 N |
7061 | } else if (mddev->bitmap == NULL) |
7062 | return -ENOENT; /* cannot remove what isn't there */ | |
7063 | err = 0; | |
7064 | if (mddev->pers) { | |
69e51b44 | 7065 | if (fd >= 0) { |
f9209a32 GR |
7066 | struct bitmap *bitmap; |
7067 | ||
e64e4018 | 7068 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7069 | mddev_suspend(mddev); |
f9209a32 GR |
7070 | if (!IS_ERR(bitmap)) { |
7071 | mddev->bitmap = bitmap; | |
e64e4018 | 7072 | err = md_bitmap_load(mddev); |
ba599aca N |
7073 | } else |
7074 | err = PTR_ERR(bitmap); | |
52a0d49d | 7075 | if (err) { |
e64e4018 | 7076 | md_bitmap_destroy(mddev); |
52a0d49d N |
7077 | fd = -1; |
7078 | } | |
9e1cc0a5 | 7079 | mddev_resume(mddev); |
52a0d49d | 7080 | } else if (fd < 0) { |
9e1cc0a5 | 7081 | mddev_suspend(mddev); |
e64e4018 | 7082 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7083 | mddev_resume(mddev); |
d7375ab3 | 7084 | } |
d7375ab3 N |
7085 | } |
7086 | if (fd < 0) { | |
4af1a041 N |
7087 | struct file *f = mddev->bitmap_info.file; |
7088 | if (f) { | |
7089 | spin_lock(&mddev->lock); | |
7090 | mddev->bitmap_info.file = NULL; | |
7091 | spin_unlock(&mddev->lock); | |
7092 | fput(f); | |
7093 | } | |
36fa3063 N |
7094 | } |
7095 | ||
32a7627c N |
7096 | return err; |
7097 | } | |
7098 | ||
1da177e4 | 7099 | /* |
7e0adbfc | 7100 | * md_set_array_info is used two different ways |
1da177e4 LT |
7101 | * The original usage is when creating a new array. |
7102 | * In this usage, raid_disks is > 0 and it together with | |
7103 | * level, size, not_persistent,layout,chunksize determine the | |
7104 | * shape of the array. | |
7105 | * This will always create an array with a type-0.90.0 superblock. | |
7106 | * The newer usage is when assembling an array. | |
7107 | * In this case raid_disks will be 0, and the major_version field is | |
7108 | * use to determine which style super-blocks are to be found on the devices. | |
7109 | * The minor and patch _version numbers are also kept incase the | |
7110 | * super_block handler wishes to interpret them. | |
7111 | */ | |
7e0adbfc | 7112 | int md_set_array_info(struct mddev *mddev, struct mdu_array_info_s *info) |
1da177e4 | 7113 | { |
1da177e4 LT |
7114 | if (info->raid_disks == 0) { |
7115 | /* just setting version number for superblock loading */ | |
7116 | if (info->major_version < 0 || | |
50511da3 | 7117 | info->major_version >= ARRAY_SIZE(super_types) || |
1da177e4 LT |
7118 | super_types[info->major_version].name == NULL) { |
7119 | /* maybe try to auto-load a module? */ | |
9d48739e | 7120 | pr_warn("md: superblock version %d not known\n", |
1da177e4 LT |
7121 | info->major_version); |
7122 | return -EINVAL; | |
7123 | } | |
7124 | mddev->major_version = info->major_version; | |
7125 | mddev->minor_version = info->minor_version; | |
7126 | mddev->patch_version = info->patch_version; | |
3f9d7b0d | 7127 | mddev->persistent = !info->not_persistent; |
cbd19983 N |
7128 | /* ensure mddev_put doesn't delete this now that there |
7129 | * is some minimal configuration. | |
7130 | */ | |
9ebc6ef1 | 7131 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
7132 | return 0; |
7133 | } | |
7134 | mddev->major_version = MD_MAJOR_VERSION; | |
7135 | mddev->minor_version = MD_MINOR_VERSION; | |
7136 | mddev->patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 7137 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
7138 | |
7139 | mddev->level = info->level; | |
17115e03 | 7140 | mddev->clevel[0] = 0; |
58c0fed4 | 7141 | mddev->dev_sectors = 2 * (sector_t)info->size; |
1da177e4 LT |
7142 | mddev->raid_disks = info->raid_disks; |
7143 | /* don't set md_minor, it is determined by which /dev/md* was | |
7144 | * openned | |
7145 | */ | |
7146 | if (info->state & (1<<MD_SB_CLEAN)) | |
7147 | mddev->recovery_cp = MaxSector; | |
7148 | else | |
7149 | mddev->recovery_cp = 0; | |
7150 | mddev->persistent = ! info->not_persistent; | |
e691063a | 7151 | mddev->external = 0; |
1da177e4 LT |
7152 | |
7153 | mddev->layout = info->layout; | |
33f2c35a N |
7154 | if (mddev->level == 0) |
7155 | /* Cannot trust RAID0 layout info here */ | |
7156 | mddev->layout = -1; | |
9d8f0363 | 7157 | mddev->chunk_sectors = info->chunk_size >> 9; |
1da177e4 | 7158 | |
2953079c | 7159 | if (mddev->persistent) { |
1b3bae49 N |
7160 | mddev->max_disks = MD_SB_DISKS; |
7161 | mddev->flags = 0; | |
7162 | mddev->sb_flags = 0; | |
2953079c SL |
7163 | } |
7164 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
1da177e4 | 7165 | |
c3d9714e | 7166 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 7167 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
c3d9714e | 7168 | mddev->bitmap_info.offset = 0; |
b2a2703c | 7169 | |
f6705578 N |
7170 | mddev->reshape_position = MaxSector; |
7171 | ||
1da177e4 LT |
7172 | /* |
7173 | * Generate a 128 bit UUID | |
7174 | */ | |
7175 | get_random_bytes(mddev->uuid, 16); | |
7176 | ||
f6705578 | 7177 | mddev->new_level = mddev->level; |
664e7c41 | 7178 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
7179 | mddev->new_layout = mddev->layout; |
7180 | mddev->delta_disks = 0; | |
2c810cdd | 7181 | mddev->reshape_backwards = 0; |
f6705578 | 7182 | |
1da177e4 LT |
7183 | return 0; |
7184 | } | |
7185 | ||
fd01b88c | 7186 | void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors) |
1f403624 | 7187 | { |
efa4b77b | 7188 | lockdep_assert_held(&mddev->reconfig_mutex); |
b522adcd DW |
7189 | |
7190 | if (mddev->external_size) | |
7191 | return; | |
7192 | ||
1f403624 DW |
7193 | mddev->array_sectors = array_sectors; |
7194 | } | |
7195 | EXPORT_SYMBOL(md_set_array_sectors); | |
7196 | ||
fd01b88c | 7197 | static int update_size(struct mddev *mddev, sector_t num_sectors) |
a35b0d69 | 7198 | { |
3cb03002 | 7199 | struct md_rdev *rdev; |
a35b0d69 | 7200 | int rv; |
d71f9f88 | 7201 | int fit = (num_sectors == 0); |
818da59f | 7202 | sector_t old_dev_sectors = mddev->dev_sectors; |
ab5a98b1 | 7203 | |
a35b0d69 N |
7204 | if (mddev->pers->resize == NULL) |
7205 | return -EINVAL; | |
d71f9f88 AN |
7206 | /* The "num_sectors" is the number of sectors of each device that |
7207 | * is used. This can only make sense for arrays with redundancy. | |
7208 | * linear and raid0 always use whatever space is available. We can only | |
7209 | * consider changing this number if no resync or reconstruction is | |
7210 | * happening, and if the new size is acceptable. It must fit before the | |
0f420358 | 7211 | * sb_start or, if that is <data_offset, it must fit before the size |
d71f9f88 AN |
7212 | * of each device. If num_sectors is zero, we find the largest size |
7213 | * that fits. | |
a35b0d69 | 7214 | */ |
f851b60d N |
7215 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
7216 | mddev->sync_thread) | |
a35b0d69 | 7217 | return -EBUSY; |
bd8839e0 N |
7218 | if (mddev->ro) |
7219 | return -EROFS; | |
a4a6125a | 7220 | |
dafb20fa | 7221 | rdev_for_each(rdev, mddev) { |
dd8ac336 | 7222 | sector_t avail = rdev->sectors; |
01ab5662 | 7223 | |
d71f9f88 AN |
7224 | if (fit && (num_sectors == 0 || num_sectors > avail)) |
7225 | num_sectors = avail; | |
7226 | if (avail < num_sectors) | |
a35b0d69 N |
7227 | return -ENOSPC; |
7228 | } | |
d71f9f88 | 7229 | rv = mddev->pers->resize(mddev, num_sectors); |
c9483634 | 7230 | if (!rv) { |
818da59f GJ |
7231 | if (mddev_is_clustered(mddev)) |
7232 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
7233 | else if (mddev->queue) { | |
2c247c51 CH |
7234 | set_capacity_and_notify(mddev->gendisk, |
7235 | mddev->array_sectors); | |
c9483634 GJ |
7236 | } |
7237 | } | |
a35b0d69 N |
7238 | return rv; |
7239 | } | |
7240 | ||
fd01b88c | 7241 | static int update_raid_disks(struct mddev *mddev, int raid_disks) |
da943b99 N |
7242 | { |
7243 | int rv; | |
c6563a8c | 7244 | struct md_rdev *rdev; |
da943b99 | 7245 | /* change the number of raid disks */ |
63c70c4f | 7246 | if (mddev->pers->check_reshape == NULL) |
da943b99 | 7247 | return -EINVAL; |
bd8839e0 N |
7248 | if (mddev->ro) |
7249 | return -EROFS; | |
da943b99 | 7250 | if (raid_disks <= 0 || |
233fca36 | 7251 | (mddev->max_disks && raid_disks >= mddev->max_disks)) |
da943b99 | 7252 | return -EINVAL; |
f851b60d N |
7253 | if (mddev->sync_thread || |
7254 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || | |
a8da01f7 | 7255 | test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) || |
f851b60d | 7256 | mddev->reshape_position != MaxSector) |
da943b99 | 7257 | return -EBUSY; |
c6563a8c N |
7258 | |
7259 | rdev_for_each(rdev, mddev) { | |
7260 | if (mddev->raid_disks < raid_disks && | |
7261 | rdev->data_offset < rdev->new_data_offset) | |
7262 | return -EINVAL; | |
7263 | if (mddev->raid_disks > raid_disks && | |
7264 | rdev->data_offset > rdev->new_data_offset) | |
7265 | return -EINVAL; | |
7266 | } | |
7267 | ||
63c70c4f | 7268 | mddev->delta_disks = raid_disks - mddev->raid_disks; |
2c810cdd N |
7269 | if (mddev->delta_disks < 0) |
7270 | mddev->reshape_backwards = 1; | |
7271 | else if (mddev->delta_disks > 0) | |
7272 | mddev->reshape_backwards = 0; | |
63c70c4f N |
7273 | |
7274 | rv = mddev->pers->check_reshape(mddev); | |
2c810cdd | 7275 | if (rv < 0) { |
de171cb9 | 7276 | mddev->delta_disks = 0; |
2c810cdd N |
7277 | mddev->reshape_backwards = 0; |
7278 | } | |
da943b99 N |
7279 | return rv; |
7280 | } | |
7281 | ||
1da177e4 LT |
7282 | /* |
7283 | * update_array_info is used to change the configuration of an | |
7284 | * on-line array. | |
7285 | * The version, ctime,level,size,raid_disks,not_persistent, layout,chunk_size | |
7286 | * fields in the info are checked against the array. | |
7287 | * Any differences that cannot be handled will cause an error. | |
7288 | * Normally, only one change can be managed at a time. | |
7289 | */ | |
fd01b88c | 7290 | static int update_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
7291 | { |
7292 | int rv = 0; | |
7293 | int cnt = 0; | |
36fa3063 N |
7294 | int state = 0; |
7295 | ||
7296 | /* calculate expected state,ignoring low bits */ | |
c3d9714e | 7297 | if (mddev->bitmap && mddev->bitmap_info.offset) |
36fa3063 | 7298 | state |= (1 << MD_SB_BITMAP_PRESENT); |
1da177e4 LT |
7299 | |
7300 | if (mddev->major_version != info->major_version || | |
7301 | mddev->minor_version != info->minor_version || | |
7302 | /* mddev->patch_version != info->patch_version || */ | |
7303 | mddev->ctime != info->ctime || | |
7304 | mddev->level != info->level || | |
7305 | /* mddev->layout != info->layout || */ | |
4e023612 | 7306 | mddev->persistent != !info->not_persistent || |
9d8f0363 | 7307 | mddev->chunk_sectors != info->chunk_size >> 9 || |
36fa3063 N |
7308 | /* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */ |
7309 | ((state^info->state) & 0xfffffe00) | |
7310 | ) | |
1da177e4 LT |
7311 | return -EINVAL; |
7312 | /* Check there is only one change */ | |
58c0fed4 AN |
7313 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
7314 | cnt++; | |
7315 | if (mddev->raid_disks != info->raid_disks) | |
7316 | cnt++; | |
7317 | if (mddev->layout != info->layout) | |
7318 | cnt++; | |
7319 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) | |
7320 | cnt++; | |
7321 | if (cnt == 0) | |
7322 | return 0; | |
7323 | if (cnt > 1) | |
7324 | return -EINVAL; | |
1da177e4 LT |
7325 | |
7326 | if (mddev->layout != info->layout) { | |
7327 | /* Change layout | |
7328 | * we don't need to do anything at the md level, the | |
7329 | * personality will take care of it all. | |
7330 | */ | |
50ac168a | 7331 | if (mddev->pers->check_reshape == NULL) |
1da177e4 | 7332 | return -EINVAL; |
597a711b N |
7333 | else { |
7334 | mddev->new_layout = info->layout; | |
50ac168a | 7335 | rv = mddev->pers->check_reshape(mddev); |
597a711b N |
7336 | if (rv) |
7337 | mddev->new_layout = mddev->layout; | |
7338 | return rv; | |
7339 | } | |
1da177e4 | 7340 | } |
58c0fed4 | 7341 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
d71f9f88 | 7342 | rv = update_size(mddev, (sector_t)info->size * 2); |
a35b0d69 | 7343 | |
da943b99 N |
7344 | if (mddev->raid_disks != info->raid_disks) |
7345 | rv = update_raid_disks(mddev, info->raid_disks); | |
7346 | ||
36fa3063 | 7347 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) { |
293467aa GR |
7348 | if (mddev->pers->quiesce == NULL || mddev->thread == NULL) { |
7349 | rv = -EINVAL; | |
7350 | goto err; | |
7351 | } | |
7352 | if (mddev->recovery || mddev->sync_thread) { | |
7353 | rv = -EBUSY; | |
7354 | goto err; | |
7355 | } | |
36fa3063 | 7356 | if (info->state & (1<<MD_SB_BITMAP_PRESENT)) { |
f9209a32 | 7357 | struct bitmap *bitmap; |
36fa3063 | 7358 | /* add the bitmap */ |
293467aa GR |
7359 | if (mddev->bitmap) { |
7360 | rv = -EEXIST; | |
7361 | goto err; | |
7362 | } | |
7363 | if (mddev->bitmap_info.default_offset == 0) { | |
7364 | rv = -EINVAL; | |
7365 | goto err; | |
7366 | } | |
c3d9714e N |
7367 | mddev->bitmap_info.offset = |
7368 | mddev->bitmap_info.default_offset; | |
6409bb05 N |
7369 | mddev->bitmap_info.space = |
7370 | mddev->bitmap_info.default_space; | |
e64e4018 | 7371 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7372 | mddev_suspend(mddev); |
f9209a32 GR |
7373 | if (!IS_ERR(bitmap)) { |
7374 | mddev->bitmap = bitmap; | |
e64e4018 | 7375 | rv = md_bitmap_load(mddev); |
ba599aca N |
7376 | } else |
7377 | rv = PTR_ERR(bitmap); | |
36fa3063 | 7378 | if (rv) |
e64e4018 | 7379 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7380 | mddev_resume(mddev); |
36fa3063 N |
7381 | } else { |
7382 | /* remove the bitmap */ | |
293467aa GR |
7383 | if (!mddev->bitmap) { |
7384 | rv = -ENOENT; | |
7385 | goto err; | |
7386 | } | |
7387 | if (mddev->bitmap->storage.file) { | |
7388 | rv = -EINVAL; | |
7389 | goto err; | |
7390 | } | |
f6a2dc64 GJ |
7391 | if (mddev->bitmap_info.nodes) { |
7392 | /* hold PW on all the bitmap lock */ | |
7393 | if (md_cluster_ops->lock_all_bitmaps(mddev) <= 0) { | |
9d48739e | 7394 | pr_warn("md: can't change bitmap to none since the array is in use by more than one node\n"); |
f6a2dc64 GJ |
7395 | rv = -EPERM; |
7396 | md_cluster_ops->unlock_all_bitmaps(mddev); | |
7397 | goto err; | |
7398 | } | |
7399 | ||
7400 | mddev->bitmap_info.nodes = 0; | |
7401 | md_cluster_ops->leave(mddev); | |
edee9dfe | 7402 | module_put(md_cluster_mod); |
7c9d5c54 | 7403 | mddev->safemode_delay = DEFAULT_SAFEMODE_DELAY; |
f6a2dc64 | 7404 | } |
9e1cc0a5 | 7405 | mddev_suspend(mddev); |
e64e4018 | 7406 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7407 | mddev_resume(mddev); |
c3d9714e | 7408 | mddev->bitmap_info.offset = 0; |
36fa3063 N |
7409 | } |
7410 | } | |
850b2b42 | 7411 | md_update_sb(mddev, 1); |
293467aa GR |
7412 | return rv; |
7413 | err: | |
1da177e4 LT |
7414 | return rv; |
7415 | } | |
7416 | ||
fd01b88c | 7417 | static int set_disk_faulty(struct mddev *mddev, dev_t dev) |
1da177e4 | 7418 | { |
3cb03002 | 7419 | struct md_rdev *rdev; |
1ca69c4b | 7420 | int err = 0; |
1da177e4 LT |
7421 | |
7422 | if (mddev->pers == NULL) | |
7423 | return -ENODEV; | |
7424 | ||
1ca69c4b | 7425 | rcu_read_lock(); |
1532d9e8 | 7426 | rdev = md_find_rdev_rcu(mddev, dev); |
1da177e4 | 7427 | if (!rdev) |
1ca69c4b N |
7428 | err = -ENODEV; |
7429 | else { | |
7430 | md_error(mddev, rdev); | |
7431 | if (!test_bit(Faulty, &rdev->flags)) | |
7432 | err = -EBUSY; | |
7433 | } | |
7434 | rcu_read_unlock(); | |
7435 | return err; | |
1da177e4 LT |
7436 | } |
7437 | ||
2f9618ce AN |
7438 | /* |
7439 | * We have a problem here : there is no easy way to give a CHS | |
7440 | * virtual geometry. We currently pretend that we have a 2 heads | |
7441 | * 4 sectors (with a BIG number of cylinders...). This drives | |
7442 | * dosfs just mad... ;-) | |
7443 | */ | |
a885c8c4 CH |
7444 | static int md_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
7445 | { | |
fd01b88c | 7446 | struct mddev *mddev = bdev->bd_disk->private_data; |
a885c8c4 CH |
7447 | |
7448 | geo->heads = 2; | |
7449 | geo->sectors = 4; | |
49ce6cea | 7450 | geo->cylinders = mddev->array_sectors / 8; |
a885c8c4 CH |
7451 | return 0; |
7452 | } | |
7453 | ||
cb335f88 NS |
7454 | static inline bool md_ioctl_valid(unsigned int cmd) |
7455 | { | |
7456 | switch (cmd) { | |
7457 | case ADD_NEW_DISK: | |
cb335f88 NS |
7458 | case GET_ARRAY_INFO: |
7459 | case GET_BITMAP_FILE: | |
7460 | case GET_DISK_INFO: | |
7461 | case HOT_ADD_DISK: | |
7462 | case HOT_REMOVE_DISK: | |
cb335f88 NS |
7463 | case RAID_VERSION: |
7464 | case RESTART_ARRAY_RW: | |
7465 | case RUN_ARRAY: | |
7466 | case SET_ARRAY_INFO: | |
7467 | case SET_BITMAP_FILE: | |
7468 | case SET_DISK_FAULTY: | |
7469 | case STOP_ARRAY: | |
7470 | case STOP_ARRAY_RO: | |
1aee41f6 | 7471 | case CLUSTERED_DISK_NACK: |
cb335f88 NS |
7472 | return true; |
7473 | default: | |
7474 | return false; | |
7475 | } | |
7476 | } | |
7477 | ||
a39907fa | 7478 | static int md_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
7479 | unsigned int cmd, unsigned long arg) |
7480 | { | |
7481 | int err = 0; | |
7482 | void __user *argp = (void __user *)arg; | |
fd01b88c | 7483 | struct mddev *mddev = NULL; |
065e519e | 7484 | bool did_set_md_closing = false; |
1da177e4 | 7485 | |
cb335f88 NS |
7486 | if (!md_ioctl_valid(cmd)) |
7487 | return -ENOTTY; | |
7488 | ||
506c9e44 N |
7489 | switch (cmd) { |
7490 | case RAID_VERSION: | |
7491 | case GET_ARRAY_INFO: | |
7492 | case GET_DISK_INFO: | |
7493 | break; | |
7494 | default: | |
7495 | if (!capable(CAP_SYS_ADMIN)) | |
7496 | return -EACCES; | |
7497 | } | |
1da177e4 LT |
7498 | |
7499 | /* | |
7500 | * Commands dealing with the RAID driver but not any | |
7501 | * particular array: | |
7502 | */ | |
c02c0aeb N |
7503 | switch (cmd) { |
7504 | case RAID_VERSION: | |
7505 | err = get_version(argp); | |
3adc28d8 | 7506 | goto out; |
c02c0aeb | 7507 | default:; |
1da177e4 LT |
7508 | } |
7509 | ||
7510 | /* | |
7511 | * Commands creating/starting a new array: | |
7512 | */ | |
7513 | ||
a39907fa | 7514 | mddev = bdev->bd_disk->private_data; |
1da177e4 LT |
7515 | |
7516 | if (!mddev) { | |
7517 | BUG(); | |
3adc28d8 | 7518 | goto out; |
1da177e4 LT |
7519 | } |
7520 | ||
1ca69c4b N |
7521 | /* Some actions do not requires the mutex */ |
7522 | switch (cmd) { | |
7523 | case GET_ARRAY_INFO: | |
7524 | if (!mddev->raid_disks && !mddev->external) | |
7525 | err = -ENODEV; | |
7526 | else | |
7527 | err = get_array_info(mddev, argp); | |
3adc28d8 | 7528 | goto out; |
1ca69c4b N |
7529 | |
7530 | case GET_DISK_INFO: | |
7531 | if (!mddev->raid_disks && !mddev->external) | |
7532 | err = -ENODEV; | |
7533 | else | |
7534 | err = get_disk_info(mddev, argp); | |
3adc28d8 | 7535 | goto out; |
1ca69c4b N |
7536 | |
7537 | case SET_DISK_FAULTY: | |
7538 | err = set_disk_faulty(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7539 | goto out; |
4af1a041 N |
7540 | |
7541 | case GET_BITMAP_FILE: | |
7542 | err = get_bitmap_file(mddev, argp); | |
7543 | goto out; | |
7544 | ||
1ca69c4b N |
7545 | } |
7546 | ||
78b990cf | 7547 | if (cmd == ADD_NEW_DISK || cmd == HOT_ADD_DISK) |
cc1ffe61 | 7548 | flush_rdev_wq(mddev); |
a7a3f08d | 7549 | |
90f5f7ad HR |
7550 | if (cmd == HOT_REMOVE_DISK) |
7551 | /* need to ensure recovery thread has run */ | |
7552 | wait_event_interruptible_timeout(mddev->sb_wait, | |
7553 | !test_bit(MD_RECOVERY_NEEDED, | |
82a301cb | 7554 | &mddev->recovery), |
90f5f7ad | 7555 | msecs_to_jiffies(5000)); |
260fa034 N |
7556 | if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) { |
7557 | /* Need to flush page cache, and ensure no-one else opens | |
7558 | * and writes | |
7559 | */ | |
7560 | mutex_lock(&mddev->open_mutex); | |
9ba3b7f5 | 7561 | if (mddev->pers && atomic_read(&mddev->openers) > 1) { |
260fa034 N |
7562 | mutex_unlock(&mddev->open_mutex); |
7563 | err = -EBUSY; | |
3adc28d8 | 7564 | goto out; |
260fa034 | 7565 | } |
c731b84b DJ |
7566 | if (test_and_set_bit(MD_CLOSING, &mddev->flags)) { |
7567 | mutex_unlock(&mddev->open_mutex); | |
7568 | err = -EBUSY; | |
7569 | goto out; | |
7570 | } | |
065e519e | 7571 | did_set_md_closing = true; |
260fa034 N |
7572 | mutex_unlock(&mddev->open_mutex); |
7573 | sync_blockdev(bdev); | |
7574 | } | |
1da177e4 LT |
7575 | err = mddev_lock(mddev); |
7576 | if (err) { | |
9d48739e N |
7577 | pr_debug("md: ioctl lock interrupted, reason %d, cmd %d\n", |
7578 | err, cmd); | |
3adc28d8 | 7579 | goto out; |
1da177e4 LT |
7580 | } |
7581 | ||
c02c0aeb N |
7582 | if (cmd == SET_ARRAY_INFO) { |
7583 | mdu_array_info_t info; | |
7584 | if (!arg) | |
7585 | memset(&info, 0, sizeof(info)); | |
7586 | else if (copy_from_user(&info, argp, sizeof(info))) { | |
7587 | err = -EFAULT; | |
3adc28d8 | 7588 | goto unlock; |
c02c0aeb N |
7589 | } |
7590 | if (mddev->pers) { | |
7591 | err = update_array_info(mddev, &info); | |
7592 | if (err) { | |
9d48739e | 7593 | pr_warn("md: couldn't update array info. %d\n", err); |
3adc28d8 | 7594 | goto unlock; |
1da177e4 | 7595 | } |
3adc28d8 | 7596 | goto unlock; |
c02c0aeb N |
7597 | } |
7598 | if (!list_empty(&mddev->disks)) { | |
9d48739e | 7599 | pr_warn("md: array %s already has disks!\n", mdname(mddev)); |
c02c0aeb | 7600 | err = -EBUSY; |
3adc28d8 | 7601 | goto unlock; |
c02c0aeb N |
7602 | } |
7603 | if (mddev->raid_disks) { | |
9d48739e | 7604 | pr_warn("md: array %s already initialised!\n", mdname(mddev)); |
c02c0aeb | 7605 | err = -EBUSY; |
3adc28d8 | 7606 | goto unlock; |
c02c0aeb | 7607 | } |
7e0adbfc | 7608 | err = md_set_array_info(mddev, &info); |
c02c0aeb | 7609 | if (err) { |
9d48739e | 7610 | pr_warn("md: couldn't set array info. %d\n", err); |
3adc28d8 | 7611 | goto unlock; |
c02c0aeb | 7612 | } |
3adc28d8 | 7613 | goto unlock; |
1da177e4 LT |
7614 | } |
7615 | ||
7616 | /* | |
7617 | * Commands querying/configuring an existing array: | |
7618 | */ | |
32a7627c | 7619 | /* if we are not initialised yet, only ADD_NEW_DISK, STOP_ARRAY, |
3f9d7b0d | 7620 | * RUN_ARRAY, and GET_ and SET_BITMAP_FILE are allowed */ |
a17184a9 N |
7621 | if ((!mddev->raid_disks && !mddev->external) |
7622 | && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY | |
7623 | && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE | |
7624 | && cmd != GET_BITMAP_FILE) { | |
1da177e4 | 7625 | err = -ENODEV; |
3adc28d8 | 7626 | goto unlock; |
1da177e4 LT |
7627 | } |
7628 | ||
7629 | /* | |
7630 | * Commands even a read-only array can execute: | |
7631 | */ | |
c02c0aeb | 7632 | switch (cmd) { |
c02c0aeb N |
7633 | case RESTART_ARRAY_RW: |
7634 | err = restart_array(mddev); | |
3adc28d8 | 7635 | goto unlock; |
1da177e4 | 7636 | |
c02c0aeb N |
7637 | case STOP_ARRAY: |
7638 | err = do_md_stop(mddev, 0, bdev); | |
3adc28d8 | 7639 | goto unlock; |
1da177e4 | 7640 | |
c02c0aeb N |
7641 | case STOP_ARRAY_RO: |
7642 | err = md_set_readonly(mddev, bdev); | |
3adc28d8 | 7643 | goto unlock; |
1da177e4 | 7644 | |
3ea8929d N |
7645 | case HOT_REMOVE_DISK: |
7646 | err = hot_remove_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7647 | goto unlock; |
3ea8929d | 7648 | |
7ceb17e8 N |
7649 | case ADD_NEW_DISK: |
7650 | /* We can support ADD_NEW_DISK on read-only arrays | |
466ad292 | 7651 | * only if we are re-adding a preexisting device. |
7ceb17e8 N |
7652 | * So require mddev->pers and MD_DISK_SYNC. |
7653 | */ | |
7654 | if (mddev->pers) { | |
7655 | mdu_disk_info_t info; | |
7656 | if (copy_from_user(&info, argp, sizeof(info))) | |
7657 | err = -EFAULT; | |
7658 | else if (!(info.state & (1<<MD_DISK_SYNC))) | |
7659 | /* Need to clear read-only for this */ | |
7660 | break; | |
7661 | else | |
7e0adbfc | 7662 | err = md_add_new_disk(mddev, &info); |
3adc28d8 | 7663 | goto unlock; |
7ceb17e8 N |
7664 | } |
7665 | break; | |
1da177e4 LT |
7666 | } |
7667 | ||
7668 | /* | |
7669 | * The remaining ioctls are changing the state of the | |
f91de92e | 7670 | * superblock, so we do not allow them on read-only arrays. |
1da177e4 | 7671 | */ |
326eb17d | 7672 | if (mddev->ro && mddev->pers) { |
f91de92e N |
7673 | if (mddev->ro == 2) { |
7674 | mddev->ro = 0; | |
00bcb4ac | 7675 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 7676 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f3378b48 N |
7677 | /* mddev_unlock will wake thread */ |
7678 | /* If a device failed while we were read-only, we | |
7679 | * need to make sure the metadata is updated now. | |
7680 | */ | |
2953079c | 7681 | if (test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) { |
f3378b48 N |
7682 | mddev_unlock(mddev); |
7683 | wait_event(mddev->sb_wait, | |
2953079c SL |
7684 | !test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags) && |
7685 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); | |
29f097c4 | 7686 | mddev_lock_nointr(mddev); |
f3378b48 | 7687 | } |
f91de92e N |
7688 | } else { |
7689 | err = -EROFS; | |
3adc28d8 | 7690 | goto unlock; |
f91de92e | 7691 | } |
1da177e4 LT |
7692 | } |
7693 | ||
c02c0aeb N |
7694 | switch (cmd) { |
7695 | case ADD_NEW_DISK: | |
1da177e4 | 7696 | { |
c02c0aeb N |
7697 | mdu_disk_info_t info; |
7698 | if (copy_from_user(&info, argp, sizeof(info))) | |
7699 | err = -EFAULT; | |
7700 | else | |
7e0adbfc | 7701 | err = md_add_new_disk(mddev, &info); |
3adc28d8 | 7702 | goto unlock; |
c02c0aeb | 7703 | } |
1da177e4 | 7704 | |
1aee41f6 GR |
7705 | case CLUSTERED_DISK_NACK: |
7706 | if (mddev_is_clustered(mddev)) | |
7707 | md_cluster_ops->new_disk_ack(mddev, false); | |
7708 | else | |
7709 | err = -EINVAL; | |
7710 | goto unlock; | |
7711 | ||
c02c0aeb N |
7712 | case HOT_ADD_DISK: |
7713 | err = hot_add_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7714 | goto unlock; |
1da177e4 | 7715 | |
c02c0aeb N |
7716 | case RUN_ARRAY: |
7717 | err = do_md_run(mddev); | |
3adc28d8 | 7718 | goto unlock; |
1da177e4 | 7719 | |
c02c0aeb N |
7720 | case SET_BITMAP_FILE: |
7721 | err = set_bitmap_file(mddev, (int)arg); | |
3adc28d8 | 7722 | goto unlock; |
32a7627c | 7723 | |
c02c0aeb N |
7724 | default: |
7725 | err = -EINVAL; | |
3adc28d8 | 7726 | goto unlock; |
1da177e4 LT |
7727 | } |
7728 | ||
3adc28d8 | 7729 | unlock: |
d3374825 N |
7730 | if (mddev->hold_active == UNTIL_IOCTL && |
7731 | err != -EINVAL) | |
7732 | mddev->hold_active = 0; | |
1da177e4 | 7733 | mddev_unlock(mddev); |
3adc28d8 | 7734 | out: |
065e519e N |
7735 | if(did_set_md_closing) |
7736 | clear_bit(MD_CLOSING, &mddev->flags); | |
1da177e4 LT |
7737 | return err; |
7738 | } | |
aa98aa31 AB |
7739 | #ifdef CONFIG_COMPAT |
7740 | static int md_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
7741 | unsigned int cmd, unsigned long arg) | |
7742 | { | |
7743 | switch (cmd) { | |
7744 | case HOT_REMOVE_DISK: | |
7745 | case HOT_ADD_DISK: | |
7746 | case SET_DISK_FAULTY: | |
7747 | case SET_BITMAP_FILE: | |
7748 | /* These take in integer arg, do not convert */ | |
7749 | break; | |
7750 | default: | |
7751 | arg = (unsigned long)compat_ptr(arg); | |
7752 | break; | |
7753 | } | |
7754 | ||
7755 | return md_ioctl(bdev, mode, cmd, arg); | |
7756 | } | |
7757 | #endif /* CONFIG_COMPAT */ | |
1da177e4 | 7758 | |
118cf084 CH |
7759 | static int md_set_read_only(struct block_device *bdev, bool ro) |
7760 | { | |
7761 | struct mddev *mddev = bdev->bd_disk->private_data; | |
7762 | int err; | |
7763 | ||
7764 | err = mddev_lock(mddev); | |
7765 | if (err) | |
7766 | return err; | |
7767 | ||
7768 | if (!mddev->raid_disks && !mddev->external) { | |
7769 | err = -ENODEV; | |
7770 | goto out_unlock; | |
7771 | } | |
7772 | ||
7773 | /* | |
7774 | * Transitioning to read-auto need only happen for arrays that call | |
7775 | * md_write_start and which are not ready for writes yet. | |
7776 | */ | |
7777 | if (!ro && mddev->ro == 1 && mddev->pers) { | |
7778 | err = restart_array(mddev); | |
7779 | if (err) | |
7780 | goto out_unlock; | |
7781 | mddev->ro = 2; | |
7782 | } | |
7783 | ||
7784 | out_unlock: | |
7785 | mddev_unlock(mddev); | |
7786 | return err; | |
7787 | } | |
7788 | ||
a39907fa | 7789 | static int md_open(struct block_device *bdev, fmode_t mode) |
1da177e4 LT |
7790 | { |
7791 | /* | |
7792 | * Succeed if we can lock the mddev, which confirms that | |
7793 | * it isn't being stopped right now. | |
7794 | */ | |
fd01b88c | 7795 | struct mddev *mddev = mddev_find(bdev->bd_dev); |
1da177e4 LT |
7796 | int err; |
7797 | ||
0c098220 YL |
7798 | if (!mddev) |
7799 | return -ENODEV; | |
7800 | ||
d3374825 N |
7801 | if (mddev->gendisk != bdev->bd_disk) { |
7802 | /* we are racing with mddev_put which is discarding this | |
7803 | * bd_disk. | |
7804 | */ | |
7805 | mddev_put(mddev); | |
7806 | /* Wait until bdev->bd_disk is definitely gone */ | |
f6766ff6 GJ |
7807 | if (work_pending(&mddev->del_work)) |
7808 | flush_workqueue(md_misc_wq); | |
6a4db2a6 | 7809 | return -EBUSY; |
d3374825 N |
7810 | } |
7811 | BUG_ON(mddev != bdev->bd_disk->private_data); | |
7812 | ||
c8c00a69 | 7813 | if ((err = mutex_lock_interruptible(&mddev->open_mutex))) |
1da177e4 LT |
7814 | goto out; |
7815 | ||
af8d8e6f GJ |
7816 | if (test_bit(MD_CLOSING, &mddev->flags)) { |
7817 | mutex_unlock(&mddev->open_mutex); | |
e2342ca8 N |
7818 | err = -ENODEV; |
7819 | goto out; | |
af8d8e6f GJ |
7820 | } |
7821 | ||
1da177e4 | 7822 | err = 0; |
f2ea68cf | 7823 | atomic_inc(&mddev->openers); |
c8c00a69 | 7824 | mutex_unlock(&mddev->open_mutex); |
1da177e4 | 7825 | |
818077d6 | 7826 | bdev_check_media_change(bdev); |
1da177e4 | 7827 | out: |
e2342ca8 N |
7828 | if (err) |
7829 | mddev_put(mddev); | |
1da177e4 LT |
7830 | return err; |
7831 | } | |
7832 | ||
db2a144b | 7833 | static void md_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 7834 | { |
f72ffdd6 | 7835 | struct mddev *mddev = disk->private_data; |
1da177e4 | 7836 | |
52e5f9d1 | 7837 | BUG_ON(!mddev); |
f2ea68cf | 7838 | atomic_dec(&mddev->openers); |
1da177e4 | 7839 | mddev_put(mddev); |
1da177e4 | 7840 | } |
f0b4f7e2 | 7841 | |
a564e23f | 7842 | static unsigned int md_check_events(struct gendisk *disk, unsigned int clearing) |
f0b4f7e2 | 7843 | { |
fd01b88c | 7844 | struct mddev *mddev = disk->private_data; |
a564e23f | 7845 | unsigned int ret = 0; |
f0b4f7e2 | 7846 | |
a564e23f CH |
7847 | if (mddev->changed) |
7848 | ret = DISK_EVENT_MEDIA_CHANGE; | |
f0b4f7e2 | 7849 | mddev->changed = 0; |
a564e23f | 7850 | return ret; |
f0b4f7e2 | 7851 | } |
a564e23f | 7852 | |
7e0adbfc | 7853 | const struct block_device_operations md_fops = |
1da177e4 LT |
7854 | { |
7855 | .owner = THIS_MODULE, | |
c62b37d9 | 7856 | .submit_bio = md_submit_bio, |
a39907fa AV |
7857 | .open = md_open, |
7858 | .release = md_release, | |
b492b852 | 7859 | .ioctl = md_ioctl, |
aa98aa31 AB |
7860 | #ifdef CONFIG_COMPAT |
7861 | .compat_ioctl = md_compat_ioctl, | |
7862 | #endif | |
a885c8c4 | 7863 | .getgeo = md_getgeo, |
a564e23f | 7864 | .check_events = md_check_events, |
118cf084 | 7865 | .set_read_only = md_set_read_only, |
1da177e4 LT |
7866 | }; |
7867 | ||
f72ffdd6 | 7868 | static int md_thread(void *arg) |
1da177e4 | 7869 | { |
2b8bf345 | 7870 | struct md_thread *thread = arg; |
1da177e4 | 7871 | |
1da177e4 LT |
7872 | /* |
7873 | * md_thread is a 'system-thread', it's priority should be very | |
7874 | * high. We avoid resource deadlocks individually in each | |
7875 | * raid personality. (RAID5 does preallocation) We also use RR and | |
7876 | * the very same RT priority as kswapd, thus we will never get | |
7877 | * into a priority inversion deadlock. | |
7878 | * | |
7879 | * we definitely have to have equal or higher priority than | |
7880 | * bdflush, otherwise bdflush will deadlock if there are too | |
7881 | * many dirty RAID5 blocks. | |
7882 | */ | |
1da177e4 | 7883 | |
6985c43f | 7884 | allow_signal(SIGKILL); |
a6fb0934 | 7885 | while (!kthread_should_stop()) { |
1da177e4 | 7886 | |
93588e22 N |
7887 | /* We need to wait INTERRUPTIBLE so that |
7888 | * we don't add to the load-average. | |
7889 | * That means we need to be sure no signals are | |
7890 | * pending | |
7891 | */ | |
7892 | if (signal_pending(current)) | |
7893 | flush_signals(current); | |
7894 | ||
7895 | wait_event_interruptible_timeout | |
7896 | (thread->wqueue, | |
7897 | test_bit(THREAD_WAKEUP, &thread->flags) | |
ce1ccd07 | 7898 | || kthread_should_stop() || kthread_should_park(), |
93588e22 | 7899 | thread->timeout); |
1da177e4 | 7900 | |
6c987910 | 7901 | clear_bit(THREAD_WAKEUP, &thread->flags); |
ce1ccd07 SL |
7902 | if (kthread_should_park()) |
7903 | kthread_parkme(); | |
6c987910 | 7904 | if (!kthread_should_stop()) |
4ed8731d | 7905 | thread->run(thread); |
1da177e4 | 7906 | } |
a6fb0934 | 7907 | |
1da177e4 LT |
7908 | return 0; |
7909 | } | |
7910 | ||
2b8bf345 | 7911 | void md_wakeup_thread(struct md_thread *thread) |
1da177e4 LT |
7912 | { |
7913 | if (thread) { | |
36a4e1fe | 7914 | pr_debug("md: waking up MD thread %s.\n", thread->tsk->comm); |
d1d90147 GJ |
7915 | set_bit(THREAD_WAKEUP, &thread->flags); |
7916 | wake_up(&thread->wqueue); | |
1da177e4 LT |
7917 | } |
7918 | } | |
6c144d31 | 7919 | EXPORT_SYMBOL(md_wakeup_thread); |
1da177e4 | 7920 | |
4ed8731d SL |
7921 | struct md_thread *md_register_thread(void (*run) (struct md_thread *), |
7922 | struct mddev *mddev, const char *name) | |
1da177e4 | 7923 | { |
2b8bf345 | 7924 | struct md_thread *thread; |
1da177e4 | 7925 | |
2b8bf345 | 7926 | thread = kzalloc(sizeof(struct md_thread), GFP_KERNEL); |
1da177e4 LT |
7927 | if (!thread) |
7928 | return NULL; | |
7929 | ||
1da177e4 LT |
7930 | init_waitqueue_head(&thread->wqueue); |
7931 | ||
1da177e4 LT |
7932 | thread->run = run; |
7933 | thread->mddev = mddev; | |
32a7627c | 7934 | thread->timeout = MAX_SCHEDULE_TIMEOUT; |
0da3c619 N |
7935 | thread->tsk = kthread_run(md_thread, thread, |
7936 | "%s_%s", | |
7937 | mdname(thread->mddev), | |
0232605d | 7938 | name); |
a6fb0934 | 7939 | if (IS_ERR(thread->tsk)) { |
1da177e4 LT |
7940 | kfree(thread); |
7941 | return NULL; | |
7942 | } | |
1da177e4 LT |
7943 | return thread; |
7944 | } | |
6c144d31 | 7945 | EXPORT_SYMBOL(md_register_thread); |
1da177e4 | 7946 | |
2b8bf345 | 7947 | void md_unregister_thread(struct md_thread **threadp) |
1da177e4 | 7948 | { |
2b8bf345 | 7949 | struct md_thread *thread = *threadp; |
e0cf8f04 N |
7950 | if (!thread) |
7951 | return; | |
36a4e1fe | 7952 | pr_debug("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk)); |
01f96c0a N |
7953 | /* Locking ensures that mddev_unlock does not wake_up a |
7954 | * non-existent thread | |
7955 | */ | |
7956 | spin_lock(&pers_lock); | |
7957 | *threadp = NULL; | |
7958 | spin_unlock(&pers_lock); | |
a6fb0934 N |
7959 | |
7960 | kthread_stop(thread->tsk); | |
1da177e4 LT |
7961 | kfree(thread); |
7962 | } | |
6c144d31 | 7963 | EXPORT_SYMBOL(md_unregister_thread); |
1da177e4 | 7964 | |
fd01b88c | 7965 | void md_error(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 7966 | { |
b2d444d7 | 7967 | if (!rdev || test_bit(Faulty, &rdev->flags)) |
1da177e4 | 7968 | return; |
6bfe0b49 | 7969 | |
de393cde | 7970 | if (!mddev->pers || !mddev->pers->error_handler) |
1da177e4 LT |
7971 | return; |
7972 | mddev->pers->error_handler(mddev,rdev); | |
72a23c21 NB |
7973 | if (mddev->degraded) |
7974 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
00bcb4ac | 7975 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
7976 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
7977 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7978 | md_wakeup_thread(mddev->thread); | |
768a418d | 7979 | if (mddev->event_work.func) |
e804ac78 | 7980 | queue_work(md_misc_wq, &mddev->event_work); |
bb9ef716 | 7981 | md_new_event(mddev); |
1da177e4 | 7982 | } |
6c144d31 | 7983 | EXPORT_SYMBOL(md_error); |
1da177e4 LT |
7984 | |
7985 | /* seq_file implementation /proc/mdstat */ | |
7986 | ||
7987 | static void status_unused(struct seq_file *seq) | |
7988 | { | |
7989 | int i = 0; | |
3cb03002 | 7990 | struct md_rdev *rdev; |
1da177e4 LT |
7991 | |
7992 | seq_printf(seq, "unused devices: "); | |
7993 | ||
159ec1fc | 7994 | list_for_each_entry(rdev, &pending_raid_disks, same_set) { |
1da177e4 LT |
7995 | char b[BDEVNAME_SIZE]; |
7996 | i++; | |
7997 | seq_printf(seq, "%s ", | |
7998 | bdevname(rdev->bdev,b)); | |
7999 | } | |
8000 | if (!i) | |
8001 | seq_printf(seq, "<none>"); | |
8002 | ||
8003 | seq_printf(seq, "\n"); | |
8004 | } | |
8005 | ||
f7851be7 | 8006 | static int status_resync(struct seq_file *seq, struct mddev *mddev) |
1da177e4 | 8007 | { |
dd71cf6b | 8008 | sector_t max_sectors, resync, res; |
9642fa73 MT |
8009 | unsigned long dt, db = 0; |
8010 | sector_t rt, curr_mark_cnt, resync_mark_cnt; | |
8011 | int scale, recovery_active; | |
4588b42e | 8012 | unsigned int per_milli; |
1da177e4 | 8013 | |
c804cdec N |
8014 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8015 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
dd71cf6b | 8016 | max_sectors = mddev->resync_max_sectors; |
1da177e4 | 8017 | else |
dd71cf6b | 8018 | max_sectors = mddev->dev_sectors; |
1da177e4 | 8019 | |
f7851be7 N |
8020 | resync = mddev->curr_resync; |
8021 | if (resync <= 3) { | |
8022 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) | |
8023 | /* Still cleaning up */ | |
8024 | resync = max_sectors; | |
d2e2ec82 ND |
8025 | } else if (resync > max_sectors) |
8026 | resync = max_sectors; | |
8027 | else | |
f7851be7 N |
8028 | resync -= atomic_read(&mddev->recovery_active); |
8029 | ||
8030 | if (resync == 0) { | |
0357ba27 GJ |
8031 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery)) { |
8032 | struct md_rdev *rdev; | |
8033 | ||
8034 | rdev_for_each(rdev, mddev) | |
8035 | if (rdev->raid_disk >= 0 && | |
8036 | !test_bit(Faulty, &rdev->flags) && | |
8037 | rdev->recovery_offset != MaxSector && | |
8038 | rdev->recovery_offset) { | |
8039 | seq_printf(seq, "\trecover=REMOTE"); | |
8040 | return 1; | |
8041 | } | |
8042 | if (mddev->reshape_position != MaxSector) | |
8043 | seq_printf(seq, "\treshape=REMOTE"); | |
8044 | else | |
8045 | seq_printf(seq, "\tresync=REMOTE"); | |
8046 | return 1; | |
8047 | } | |
f7851be7 N |
8048 | if (mddev->recovery_cp < MaxSector) { |
8049 | seq_printf(seq, "\tresync=PENDING"); | |
8050 | return 1; | |
8051 | } | |
8052 | return 0; | |
8053 | } | |
8054 | if (resync < 3) { | |
8055 | seq_printf(seq, "\tresync=DELAYED"); | |
8056 | return 1; | |
8057 | } | |
8058 | ||
403df478 | 8059 | WARN_ON(max_sectors == 0); |
4588b42e | 8060 | /* Pick 'scale' such that (resync>>scale)*1000 will fit |
dd71cf6b | 8061 | * in a sector_t, and (max_sectors>>scale) will fit in a |
4588b42e N |
8062 | * u32, as those are the requirements for sector_div. |
8063 | * Thus 'scale' must be at least 10 | |
8064 | */ | |
8065 | scale = 10; | |
8066 | if (sizeof(sector_t) > sizeof(unsigned long)) { | |
dd71cf6b | 8067 | while ( max_sectors/2 > (1ULL<<(scale+32))) |
4588b42e N |
8068 | scale++; |
8069 | } | |
8070 | res = (resync>>scale)*1000; | |
dd71cf6b | 8071 | sector_div(res, (u32)((max_sectors>>scale)+1)); |
4588b42e N |
8072 | |
8073 | per_milli = res; | |
1da177e4 | 8074 | { |
4588b42e | 8075 | int i, x = per_milli/50, y = 20-x; |
1da177e4 LT |
8076 | seq_printf(seq, "["); |
8077 | for (i = 0; i < x; i++) | |
8078 | seq_printf(seq, "="); | |
8079 | seq_printf(seq, ">"); | |
8080 | for (i = 0; i < y; i++) | |
8081 | seq_printf(seq, "."); | |
8082 | seq_printf(seq, "] "); | |
8083 | } | |
4588b42e | 8084 | seq_printf(seq, " %s =%3u.%u%% (%llu/%llu)", |
ccfcc3c1 N |
8085 | (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)? |
8086 | "reshape" : | |
61df9d91 N |
8087 | (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)? |
8088 | "check" : | |
8089 | (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? | |
8090 | "resync" : "recovery"))), | |
8091 | per_milli/10, per_milli % 10, | |
dd71cf6b N |
8092 | (unsigned long long) resync/2, |
8093 | (unsigned long long) max_sectors/2); | |
1da177e4 LT |
8094 | |
8095 | /* | |
1da177e4 LT |
8096 | * dt: time from mark until now |
8097 | * db: blocks written from mark until now | |
8098 | * rt: remaining time | |
dd71cf6b | 8099 | * |
9642fa73 MT |
8100 | * rt is a sector_t, which is always 64bit now. We are keeping |
8101 | * the original algorithm, but it is not really necessary. | |
8102 | * | |
8103 | * Original algorithm: | |
8104 | * So we divide before multiply in case it is 32bit and close | |
8105 | * to the limit. | |
8106 | * We scale the divisor (db) by 32 to avoid losing precision | |
8107 | * near the end of resync when the number of remaining sectors | |
8108 | * is close to 'db'. | |
8109 | * We then divide rt by 32 after multiplying by db to compensate. | |
8110 | * The '+1' avoids division by zero if db is very small. | |
1da177e4 LT |
8111 | */ |
8112 | dt = ((jiffies - mddev->resync_mark) / HZ); | |
8113 | if (!dt) dt++; | |
9642fa73 MT |
8114 | |
8115 | curr_mark_cnt = mddev->curr_mark_cnt; | |
8116 | recovery_active = atomic_read(&mddev->recovery_active); | |
8117 | resync_mark_cnt = mddev->resync_mark_cnt; | |
8118 | ||
8119 | if (curr_mark_cnt >= (recovery_active + resync_mark_cnt)) | |
8120 | db = curr_mark_cnt - (recovery_active + resync_mark_cnt); | |
1da177e4 | 8121 | |
dd71cf6b | 8122 | rt = max_sectors - resync; /* number of remaining sectors */ |
9642fa73 | 8123 | rt = div64_u64(rt, db/32+1); |
dd71cf6b N |
8124 | rt *= dt; |
8125 | rt >>= 5; | |
8126 | ||
8127 | seq_printf(seq, " finish=%lu.%lumin", (unsigned long)rt / 60, | |
8128 | ((unsigned long)rt % 60)/6); | |
1da177e4 | 8129 | |
ff4e8d9a | 8130 | seq_printf(seq, " speed=%ldK/sec", db/2/dt); |
f7851be7 | 8131 | return 1; |
1da177e4 LT |
8132 | } |
8133 | ||
8134 | static void *md_seq_start(struct seq_file *seq, loff_t *pos) | |
8135 | { | |
8136 | struct list_head *tmp; | |
8137 | loff_t l = *pos; | |
fd01b88c | 8138 | struct mddev *mddev; |
1da177e4 | 8139 | |
7abfabaf JG |
8140 | if (l == 0x10000) { |
8141 | ++*pos; | |
8142 | return (void *)2; | |
8143 | } | |
8144 | if (l > 0x10000) | |
1da177e4 LT |
8145 | return NULL; |
8146 | if (!l--) | |
8147 | /* header */ | |
8148 | return (void*)1; | |
8149 | ||
8150 | spin_lock(&all_mddevs_lock); | |
8151 | list_for_each(tmp,&all_mddevs) | |
8152 | if (!l--) { | |
fd01b88c | 8153 | mddev = list_entry(tmp, struct mddev, all_mddevs); |
1da177e4 LT |
8154 | mddev_get(mddev); |
8155 | spin_unlock(&all_mddevs_lock); | |
8156 | return mddev; | |
8157 | } | |
8158 | spin_unlock(&all_mddevs_lock); | |
8159 | if (!l--) | |
8160 | return (void*)2;/* tail */ | |
8161 | return NULL; | |
8162 | } | |
8163 | ||
8164 | static void *md_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
8165 | { | |
8166 | struct list_head *tmp; | |
fd01b88c | 8167 | struct mddev *next_mddev, *mddev = v; |
f72ffdd6 | 8168 | |
1da177e4 LT |
8169 | ++*pos; |
8170 | if (v == (void*)2) | |
8171 | return NULL; | |
8172 | ||
8173 | spin_lock(&all_mddevs_lock); | |
8174 | if (v == (void*)1) | |
8175 | tmp = all_mddevs.next; | |
8176 | else | |
8177 | tmp = mddev->all_mddevs.next; | |
8178 | if (tmp != &all_mddevs) | |
fd01b88c | 8179 | next_mddev = mddev_get(list_entry(tmp,struct mddev,all_mddevs)); |
1da177e4 LT |
8180 | else { |
8181 | next_mddev = (void*)2; | |
8182 | *pos = 0x10000; | |
f72ffdd6 | 8183 | } |
1da177e4 LT |
8184 | spin_unlock(&all_mddevs_lock); |
8185 | ||
8186 | if (v != (void*)1) | |
8187 | mddev_put(mddev); | |
8188 | return next_mddev; | |
8189 | ||
8190 | } | |
8191 | ||
8192 | static void md_seq_stop(struct seq_file *seq, void *v) | |
8193 | { | |
fd01b88c | 8194 | struct mddev *mddev = v; |
1da177e4 LT |
8195 | |
8196 | if (mddev && v != (void*)1 && v != (void*)2) | |
8197 | mddev_put(mddev); | |
8198 | } | |
8199 | ||
8200 | static int md_seq_show(struct seq_file *seq, void *v) | |
8201 | { | |
fd01b88c | 8202 | struct mddev *mddev = v; |
dd8ac336 | 8203 | sector_t sectors; |
3cb03002 | 8204 | struct md_rdev *rdev; |
1da177e4 LT |
8205 | |
8206 | if (v == (void*)1) { | |
84fc4b56 | 8207 | struct md_personality *pers; |
1da177e4 LT |
8208 | seq_printf(seq, "Personalities : "); |
8209 | spin_lock(&pers_lock); | |
2604b703 N |
8210 | list_for_each_entry(pers, &pers_list, list) |
8211 | seq_printf(seq, "[%s] ", pers->name); | |
1da177e4 LT |
8212 | |
8213 | spin_unlock(&pers_lock); | |
8214 | seq_printf(seq, "\n"); | |
f1514638 | 8215 | seq->poll_event = atomic_read(&md_event_count); |
1da177e4 LT |
8216 | return 0; |
8217 | } | |
8218 | if (v == (void*)2) { | |
8219 | status_unused(seq); | |
8220 | return 0; | |
8221 | } | |
8222 | ||
36d091f4 | 8223 | spin_lock(&mddev->lock); |
1da177e4 LT |
8224 | if (mddev->pers || mddev->raid_disks || !list_empty(&mddev->disks)) { |
8225 | seq_printf(seq, "%s : %sactive", mdname(mddev), | |
8226 | mddev->pers ? "" : "in"); | |
8227 | if (mddev->pers) { | |
f91de92e | 8228 | if (mddev->ro==1) |
1da177e4 | 8229 | seq_printf(seq, " (read-only)"); |
f91de92e | 8230 | if (mddev->ro==2) |
52720ae7 | 8231 | seq_printf(seq, " (auto-read-only)"); |
1da177e4 LT |
8232 | seq_printf(seq, " %s", mddev->pers->name); |
8233 | } | |
8234 | ||
dd8ac336 | 8235 | sectors = 0; |
f97fcad3 N |
8236 | rcu_read_lock(); |
8237 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 LT |
8238 | char b[BDEVNAME_SIZE]; |
8239 | seq_printf(seq, " %s[%d]", | |
8240 | bdevname(rdev->bdev,b), rdev->desc_nr); | |
8ddf9efe N |
8241 | if (test_bit(WriteMostly, &rdev->flags)) |
8242 | seq_printf(seq, "(W)"); | |
9efdca16 SL |
8243 | if (test_bit(Journal, &rdev->flags)) |
8244 | seq_printf(seq, "(J)"); | |
b2d444d7 | 8245 | if (test_bit(Faulty, &rdev->flags)) { |
1da177e4 LT |
8246 | seq_printf(seq, "(F)"); |
8247 | continue; | |
2d78f8c4 N |
8248 | } |
8249 | if (rdev->raid_disk < 0) | |
b325a32e | 8250 | seq_printf(seq, "(S)"); /* spare */ |
2d78f8c4 N |
8251 | if (test_bit(Replacement, &rdev->flags)) |
8252 | seq_printf(seq, "(R)"); | |
dd8ac336 | 8253 | sectors += rdev->sectors; |
1da177e4 | 8254 | } |
f97fcad3 | 8255 | rcu_read_unlock(); |
1da177e4 LT |
8256 | |
8257 | if (!list_empty(&mddev->disks)) { | |
8258 | if (mddev->pers) | |
8259 | seq_printf(seq, "\n %llu blocks", | |
f233ea5c AN |
8260 | (unsigned long long) |
8261 | mddev->array_sectors / 2); | |
1da177e4 LT |
8262 | else |
8263 | seq_printf(seq, "\n %llu blocks", | |
dd8ac336 | 8264 | (unsigned long long)sectors / 2); |
1da177e4 | 8265 | } |
1cd6bf19 N |
8266 | if (mddev->persistent) { |
8267 | if (mddev->major_version != 0 || | |
8268 | mddev->minor_version != 90) { | |
8269 | seq_printf(seq," super %d.%d", | |
8270 | mddev->major_version, | |
8271 | mddev->minor_version); | |
8272 | } | |
e691063a N |
8273 | } else if (mddev->external) |
8274 | seq_printf(seq, " super external:%s", | |
8275 | mddev->metadata_type); | |
8276 | else | |
1cd6bf19 | 8277 | seq_printf(seq, " super non-persistent"); |
1da177e4 LT |
8278 | |
8279 | if (mddev->pers) { | |
d710e138 | 8280 | mddev->pers->status(seq, mddev); |
f72ffdd6 | 8281 | seq_printf(seq, "\n "); |
8e1b39d6 | 8282 | if (mddev->pers->sync_request) { |
f7851be7 | 8283 | if (status_resync(seq, mddev)) |
8e1b39d6 | 8284 | seq_printf(seq, "\n "); |
8e1b39d6 | 8285 | } |
32a7627c N |
8286 | } else |
8287 | seq_printf(seq, "\n "); | |
8288 | ||
e64e4018 | 8289 | md_bitmap_status(seq, mddev->bitmap); |
1da177e4 LT |
8290 | |
8291 | seq_printf(seq, "\n"); | |
8292 | } | |
36d091f4 | 8293 | spin_unlock(&mddev->lock); |
f72ffdd6 | 8294 | |
1da177e4 LT |
8295 | return 0; |
8296 | } | |
8297 | ||
110518bc | 8298 | static const struct seq_operations md_seq_ops = { |
1da177e4 LT |
8299 | .start = md_seq_start, |
8300 | .next = md_seq_next, | |
8301 | .stop = md_seq_stop, | |
8302 | .show = md_seq_show, | |
8303 | }; | |
8304 | ||
8305 | static int md_seq_open(struct inode *inode, struct file *file) | |
8306 | { | |
f1514638 | 8307 | struct seq_file *seq; |
1da177e4 LT |
8308 | int error; |
8309 | ||
8310 | error = seq_open(file, &md_seq_ops); | |
d7603b7e | 8311 | if (error) |
f1514638 KS |
8312 | return error; |
8313 | ||
8314 | seq = file->private_data; | |
8315 | seq->poll_event = atomic_read(&md_event_count); | |
1da177e4 LT |
8316 | return error; |
8317 | } | |
8318 | ||
e2f23b60 | 8319 | static int md_unloading; |
afc9a42b | 8320 | static __poll_t mdstat_poll(struct file *filp, poll_table *wait) |
d7603b7e | 8321 | { |
f1514638 | 8322 | struct seq_file *seq = filp->private_data; |
afc9a42b | 8323 | __poll_t mask; |
d7603b7e | 8324 | |
e2f23b60 | 8325 | if (md_unloading) |
a9a08845 | 8326 | return EPOLLIN|EPOLLRDNORM|EPOLLERR|EPOLLPRI; |
d7603b7e N |
8327 | poll_wait(filp, &md_event_waiters, wait); |
8328 | ||
8329 | /* always allow read */ | |
a9a08845 | 8330 | mask = EPOLLIN | EPOLLRDNORM; |
d7603b7e | 8331 | |
f1514638 | 8332 | if (seq->poll_event != atomic_read(&md_event_count)) |
a9a08845 | 8333 | mask |= EPOLLERR | EPOLLPRI; |
d7603b7e N |
8334 | return mask; |
8335 | } | |
8336 | ||
97a32539 AD |
8337 | static const struct proc_ops mdstat_proc_ops = { |
8338 | .proc_open = md_seq_open, | |
8339 | .proc_read = seq_read, | |
8340 | .proc_lseek = seq_lseek, | |
8341 | .proc_release = seq_release, | |
8342 | .proc_poll = mdstat_poll, | |
1da177e4 LT |
8343 | }; |
8344 | ||
84fc4b56 | 8345 | int register_md_personality(struct md_personality *p) |
1da177e4 | 8346 | { |
9d48739e N |
8347 | pr_debug("md: %s personality registered for level %d\n", |
8348 | p->name, p->level); | |
1da177e4 | 8349 | spin_lock(&pers_lock); |
2604b703 | 8350 | list_add_tail(&p->list, &pers_list); |
1da177e4 LT |
8351 | spin_unlock(&pers_lock); |
8352 | return 0; | |
8353 | } | |
6c144d31 | 8354 | EXPORT_SYMBOL(register_md_personality); |
1da177e4 | 8355 | |
84fc4b56 | 8356 | int unregister_md_personality(struct md_personality *p) |
1da177e4 | 8357 | { |
9d48739e | 8358 | pr_debug("md: %s personality unregistered\n", p->name); |
1da177e4 | 8359 | spin_lock(&pers_lock); |
2604b703 | 8360 | list_del_init(&p->list); |
1da177e4 LT |
8361 | spin_unlock(&pers_lock); |
8362 | return 0; | |
8363 | } | |
6c144d31 | 8364 | EXPORT_SYMBOL(unregister_md_personality); |
1da177e4 | 8365 | |
6022e75b N |
8366 | int register_md_cluster_operations(struct md_cluster_operations *ops, |
8367 | struct module *module) | |
edb39c9d | 8368 | { |
6022e75b | 8369 | int ret = 0; |
edb39c9d | 8370 | spin_lock(&pers_lock); |
6022e75b N |
8371 | if (md_cluster_ops != NULL) |
8372 | ret = -EALREADY; | |
8373 | else { | |
8374 | md_cluster_ops = ops; | |
8375 | md_cluster_mod = module; | |
8376 | } | |
edb39c9d | 8377 | spin_unlock(&pers_lock); |
6022e75b | 8378 | return ret; |
edb39c9d GR |
8379 | } |
8380 | EXPORT_SYMBOL(register_md_cluster_operations); | |
8381 | ||
8382 | int unregister_md_cluster_operations(void) | |
8383 | { | |
8384 | spin_lock(&pers_lock); | |
8385 | md_cluster_ops = NULL; | |
8386 | spin_unlock(&pers_lock); | |
8387 | return 0; | |
8388 | } | |
8389 | EXPORT_SYMBOL(unregister_md_cluster_operations); | |
8390 | ||
8391 | int md_setup_cluster(struct mddev *mddev, int nodes) | |
8392 | { | |
7c9d5c54 | 8393 | int ret; |
47a7b0d8 GJ |
8394 | if (!md_cluster_ops) |
8395 | request_module("md-cluster"); | |
edb39c9d | 8396 | spin_lock(&pers_lock); |
47a7b0d8 | 8397 | /* ensure module won't be unloaded */ |
edb39c9d | 8398 | if (!md_cluster_ops || !try_module_get(md_cluster_mod)) { |
9d48739e | 8399 | pr_warn("can't find md-cluster module or get it's reference.\n"); |
edb39c9d GR |
8400 | spin_unlock(&pers_lock); |
8401 | return -ENOENT; | |
8402 | } | |
8403 | spin_unlock(&pers_lock); | |
8404 | ||
7c9d5c54 ZH |
8405 | ret = md_cluster_ops->join(mddev, nodes); |
8406 | if (!ret) | |
8407 | mddev->safemode_delay = 0; | |
8408 | return ret; | |
edb39c9d GR |
8409 | } |
8410 | ||
8411 | void md_cluster_stop(struct mddev *mddev) | |
8412 | { | |
c4ce867f GR |
8413 | if (!md_cluster_ops) |
8414 | return; | |
edb39c9d GR |
8415 | md_cluster_ops->leave(mddev); |
8416 | module_put(md_cluster_mod); | |
8417 | } | |
8418 | ||
fd01b88c | 8419 | static int is_mddev_idle(struct mddev *mddev, int init) |
1da177e4 | 8420 | { |
f72ffdd6 | 8421 | struct md_rdev *rdev; |
1da177e4 | 8422 | int idle; |
eea1bf38 | 8423 | int curr_events; |
1da177e4 LT |
8424 | |
8425 | idle = 1; | |
4b80991c N |
8426 | rcu_read_lock(); |
8427 | rdev_for_each_rcu(rdev, mddev) { | |
4245e52d | 8428 | struct gendisk *disk = rdev->bdev->bd_disk; |
8446fe92 | 8429 | curr_events = (int)part_stat_read_accum(disk->part0, sectors) - |
eea1bf38 | 8430 | atomic_read(&disk->sync_io); |
713f6ab1 N |
8431 | /* sync IO will cause sync_io to increase before the disk_stats |
8432 | * as sync_io is counted when a request starts, and | |
8433 | * disk_stats is counted when it completes. | |
8434 | * So resync activity will cause curr_events to be smaller than | |
8435 | * when there was no such activity. | |
8436 | * non-sync IO will cause disk_stat to increase without | |
8437 | * increasing sync_io so curr_events will (eventually) | |
8438 | * be larger than it was before. Once it becomes | |
8439 | * substantially larger, the test below will cause | |
8440 | * the array to appear non-idle, and resync will slow | |
8441 | * down. | |
8442 | * If there is a lot of outstanding resync activity when | |
8443 | * we set last_event to curr_events, then all that activity | |
8444 | * completing might cause the array to appear non-idle | |
8445 | * and resync will be slowed down even though there might | |
8446 | * not have been non-resync activity. This will only | |
8447 | * happen once though. 'last_events' will soon reflect | |
8448 | * the state where there is little or no outstanding | |
8449 | * resync requests, and further resync activity will | |
8450 | * always make curr_events less than last_events. | |
c0e48521 | 8451 | * |
1da177e4 | 8452 | */ |
eea1bf38 | 8453 | if (init || curr_events - rdev->last_events > 64) { |
1da177e4 LT |
8454 | rdev->last_events = curr_events; |
8455 | idle = 0; | |
8456 | } | |
8457 | } | |
4b80991c | 8458 | rcu_read_unlock(); |
1da177e4 LT |
8459 | return idle; |
8460 | } | |
8461 | ||
fd01b88c | 8462 | void md_done_sync(struct mddev *mddev, int blocks, int ok) |
1da177e4 LT |
8463 | { |
8464 | /* another "blocks" (512byte) blocks have been synced */ | |
8465 | atomic_sub(blocks, &mddev->recovery_active); | |
8466 | wake_up(&mddev->recovery_wait); | |
8467 | if (!ok) { | |
dfc70645 | 8468 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
0a19caab | 8469 | set_bit(MD_RECOVERY_ERROR, &mddev->recovery); |
1da177e4 LT |
8470 | md_wakeup_thread(mddev->thread); |
8471 | // stop recovery, signal do_sync .... | |
8472 | } | |
8473 | } | |
6c144d31 | 8474 | EXPORT_SYMBOL(md_done_sync); |
1da177e4 | 8475 | |
06d91a5f N |
8476 | /* md_write_start(mddev, bi) |
8477 | * If we need to update some array metadata (e.g. 'active' flag | |
3d310eb7 N |
8478 | * in superblock) before writing, schedule a superblock update |
8479 | * and wait for it to complete. | |
cc27b0c7 N |
8480 | * A return value of 'false' means that the write wasn't recorded |
8481 | * and cannot proceed as the array is being suspend. | |
06d91a5f | 8482 | */ |
cc27b0c7 | 8483 | bool md_write_start(struct mddev *mddev, struct bio *bi) |
1da177e4 | 8484 | { |
0fd62b86 | 8485 | int did_change = 0; |
4b6c1060 | 8486 | |
06d91a5f | 8487 | if (bio_data_dir(bi) != WRITE) |
cc27b0c7 | 8488 | return true; |
06d91a5f | 8489 | |
f91de92e N |
8490 | BUG_ON(mddev->ro == 1); |
8491 | if (mddev->ro == 2) { | |
8492 | /* need to switch to read/write */ | |
8493 | mddev->ro = 0; | |
8494 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8495 | md_wakeup_thread(mddev->thread); | |
25156198 | 8496 | md_wakeup_thread(mddev->sync_thread); |
0fd62b86 | 8497 | did_change = 1; |
f91de92e | 8498 | } |
4ad23a97 N |
8499 | rcu_read_lock(); |
8500 | percpu_ref_get(&mddev->writes_pending); | |
55cc39f3 | 8501 | smp_mb(); /* Match smp_mb in set_in_sync() */ |
31a59e34 N |
8502 | if (mddev->safemode == 1) |
8503 | mddev->safemode = 0; | |
4ad23a97 | 8504 | /* sync_checkers is always 0 when writes_pending is in per-cpu mode */ |
81fe48e9 | 8505 | if (mddev->in_sync || mddev->sync_checkers) { |
85572d7c | 8506 | spin_lock(&mddev->lock); |
3d310eb7 N |
8507 | if (mddev->in_sync) { |
8508 | mddev->in_sync = 0; | |
2953079c SL |
8509 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8510 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
3d310eb7 | 8511 | md_wakeup_thread(mddev->thread); |
0fd62b86 | 8512 | did_change = 1; |
3d310eb7 | 8513 | } |
85572d7c | 8514 | spin_unlock(&mddev->lock); |
06d91a5f | 8515 | } |
4ad23a97 | 8516 | rcu_read_unlock(); |
0fd62b86 | 8517 | if (did_change) |
00bcb4ac | 8518 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
4b6c1060 HM |
8519 | if (!mddev->has_superblocks) |
8520 | return true; | |
09a44cc1 | 8521 | wait_event(mddev->sb_wait, |
d47c8ad2 N |
8522 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags) || |
8523 | mddev->suspended); | |
cc27b0c7 N |
8524 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) { |
8525 | percpu_ref_put(&mddev->writes_pending); | |
8526 | return false; | |
8527 | } | |
8528 | return true; | |
1da177e4 | 8529 | } |
6c144d31 | 8530 | EXPORT_SYMBOL(md_write_start); |
1da177e4 | 8531 | |
49728050 N |
8532 | /* md_write_inc can only be called when md_write_start() has |
8533 | * already been called at least once of the current request. | |
8534 | * It increments the counter and is useful when a single request | |
8535 | * is split into several parts. Each part causes an increment and | |
8536 | * so needs a matching md_write_end(). | |
8537 | * Unlike md_write_start(), it is safe to call md_write_inc() inside | |
8538 | * a spinlocked region. | |
8539 | */ | |
8540 | void md_write_inc(struct mddev *mddev, struct bio *bi) | |
8541 | { | |
8542 | if (bio_data_dir(bi) != WRITE) | |
8543 | return; | |
8544 | WARN_ON_ONCE(mddev->in_sync || mddev->ro); | |
4ad23a97 | 8545 | percpu_ref_get(&mddev->writes_pending); |
49728050 N |
8546 | } |
8547 | EXPORT_SYMBOL(md_write_inc); | |
8548 | ||
fd01b88c | 8549 | void md_write_end(struct mddev *mddev) |
1da177e4 | 8550 | { |
4ad23a97 N |
8551 | percpu_ref_put(&mddev->writes_pending); |
8552 | ||
8553 | if (mddev->safemode == 2) | |
8554 | md_wakeup_thread(mddev->thread); | |
8555 | else if (mddev->safemode_delay) | |
8556 | /* The roundup() ensures this only performs locking once | |
8557 | * every ->safemode_delay jiffies | |
8558 | */ | |
8559 | mod_timer(&mddev->safemode_timer, | |
8560 | roundup(jiffies, mddev->safemode_delay) + | |
8561 | mddev->safemode_delay); | |
1da177e4 | 8562 | } |
4ad23a97 | 8563 | |
6c144d31 | 8564 | EXPORT_SYMBOL(md_write_end); |
1da177e4 | 8565 | |
cf78408f XN |
8566 | /* This is used by raid0 and raid10 */ |
8567 | void md_submit_discard_bio(struct mddev *mddev, struct md_rdev *rdev, | |
8568 | struct bio *bio, sector_t start, sector_t size) | |
8569 | { | |
8570 | struct bio *discard_bio = NULL; | |
8571 | ||
8572 | if (__blkdev_issue_discard(rdev->bdev, start, size, GFP_NOIO, 0, | |
8573 | &discard_bio) || !discard_bio) | |
8574 | return; | |
8575 | ||
8576 | bio_chain(discard_bio, bio); | |
8577 | bio_clone_blkg_association(discard_bio, bio); | |
8578 | if (mddev->gendisk) | |
8579 | trace_block_bio_remap(discard_bio, | |
8580 | disk_devt(mddev->gendisk), | |
8581 | bio->bi_iter.bi_sector); | |
8582 | submit_bio_noacct(discard_bio); | |
8583 | } | |
8584 | EXPORT_SYMBOL_GPL(md_submit_discard_bio); | |
8585 | ||
306d8015 XN |
8586 | int acct_bioset_init(struct mddev *mddev) |
8587 | { | |
8588 | int err = 0; | |
8589 | ||
8590 | if (!bioset_initialized(&mddev->io_acct_set)) | |
8591 | err = bioset_init(&mddev->io_acct_set, BIO_POOL_SIZE, | |
8592 | offsetof(struct md_io_acct, bio_clone), 0); | |
8593 | return err; | |
8594 | } | |
8595 | EXPORT_SYMBOL_GPL(acct_bioset_init); | |
8596 | ||
8597 | void acct_bioset_exit(struct mddev *mddev) | |
8598 | { | |
8599 | bioset_exit(&mddev->io_acct_set); | |
8600 | } | |
8601 | EXPORT_SYMBOL_GPL(acct_bioset_exit); | |
8602 | ||
10764815 GJ |
8603 | static void md_end_io_acct(struct bio *bio) |
8604 | { | |
8605 | struct md_io_acct *md_io_acct = bio->bi_private; | |
8606 | struct bio *orig_bio = md_io_acct->orig_bio; | |
8607 | ||
8608 | orig_bio->bi_status = bio->bi_status; | |
8609 | ||
8610 | bio_end_io_acct(orig_bio, md_io_acct->start_time); | |
8611 | bio_put(bio); | |
8612 | bio_endio(orig_bio); | |
8613 | } | |
8614 | ||
daee2024 GJ |
8615 | /* |
8616 | * Used by personalities that don't already clone the bio and thus can't | |
8617 | * easily add the timestamp to their extended bio structure. | |
8618 | */ | |
10764815 GJ |
8619 | void md_account_bio(struct mddev *mddev, struct bio **bio) |
8620 | { | |
8621 | struct md_io_acct *md_io_acct; | |
8622 | struct bio *clone; | |
8623 | ||
8624 | if (!blk_queue_io_stat((*bio)->bi_bdev->bd_disk->queue)) | |
8625 | return; | |
8626 | ||
8627 | clone = bio_clone_fast(*bio, GFP_NOIO, &mddev->io_acct_set); | |
8628 | md_io_acct = container_of(clone, struct md_io_acct, bio_clone); | |
8629 | md_io_acct->orig_bio = *bio; | |
8630 | md_io_acct->start_time = bio_start_io_acct(*bio); | |
8631 | ||
8632 | clone->bi_end_io = md_end_io_acct; | |
8633 | clone->bi_private = md_io_acct; | |
8634 | *bio = clone; | |
8635 | } | |
8636 | EXPORT_SYMBOL_GPL(md_account_bio); | |
8637 | ||
2a2275d6 N |
8638 | /* md_allow_write(mddev) |
8639 | * Calling this ensures that the array is marked 'active' so that writes | |
8640 | * may proceed without blocking. It is important to call this before | |
8641 | * attempting a GFP_KERNEL allocation while holding the mddev lock. | |
8642 | * Must be called with mddev_lock held. | |
8643 | */ | |
2214c260 | 8644 | void md_allow_write(struct mddev *mddev) |
2a2275d6 N |
8645 | { |
8646 | if (!mddev->pers) | |
2214c260 | 8647 | return; |
2a2275d6 | 8648 | if (mddev->ro) |
2214c260 | 8649 | return; |
1a0fd497 | 8650 | if (!mddev->pers->sync_request) |
2214c260 | 8651 | return; |
2a2275d6 | 8652 | |
85572d7c | 8653 | spin_lock(&mddev->lock); |
2a2275d6 N |
8654 | if (mddev->in_sync) { |
8655 | mddev->in_sync = 0; | |
2953079c SL |
8656 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8657 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
2a2275d6 N |
8658 | if (mddev->safemode_delay && |
8659 | mddev->safemode == 0) | |
8660 | mddev->safemode = 1; | |
85572d7c | 8661 | spin_unlock(&mddev->lock); |
2a2275d6 | 8662 | md_update_sb(mddev, 0); |
00bcb4ac | 8663 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
2214c260 AP |
8664 | /* wait for the dirty state to be recorded in the metadata */ |
8665 | wait_event(mddev->sb_wait, | |
2214c260 | 8666 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
2a2275d6 | 8667 | } else |
85572d7c | 8668 | spin_unlock(&mddev->lock); |
2a2275d6 N |
8669 | } |
8670 | EXPORT_SYMBOL_GPL(md_allow_write); | |
8671 | ||
1da177e4 LT |
8672 | #define SYNC_MARKS 10 |
8673 | #define SYNC_MARK_STEP (3*HZ) | |
54f89341 | 8674 | #define UPDATE_FREQUENCY (5*60*HZ) |
4ed8731d | 8675 | void md_do_sync(struct md_thread *thread) |
1da177e4 | 8676 | { |
4ed8731d | 8677 | struct mddev *mddev = thread->mddev; |
fd01b88c | 8678 | struct mddev *mddev2; |
e5b521ee | 8679 | unsigned int currspeed = 0, window; |
ac7e50a3 | 8680 | sector_t max_sectors,j, io_sectors, recovery_done; |
1da177e4 | 8681 | unsigned long mark[SYNC_MARKS]; |
54f89341 | 8682 | unsigned long update_time; |
1da177e4 LT |
8683 | sector_t mark_cnt[SYNC_MARKS]; |
8684 | int last_mark,m; | |
8685 | struct list_head *tmp; | |
8686 | sector_t last_check; | |
57afd89f | 8687 | int skipped = 0; |
3cb03002 | 8688 | struct md_rdev *rdev; |
c4a39551 | 8689 | char *desc, *action = NULL; |
7c2c57c9 | 8690 | struct blk_plug plug; |
41a9a0dc | 8691 | int ret; |
1da177e4 LT |
8692 | |
8693 | /* just incase thread restarts... */ | |
d5d885fd SL |
8694 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
8695 | test_bit(MD_RECOVERY_WAIT, &mddev->recovery)) | |
1da177e4 | 8696 | return; |
3991b31e N |
8697 | if (mddev->ro) {/* never try to sync a read-only array */ |
8698 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
5fd6c1dc | 8699 | return; |
3991b31e | 8700 | } |
1da177e4 | 8701 | |
41a9a0dc GJ |
8702 | if (mddev_is_clustered(mddev)) { |
8703 | ret = md_cluster_ops->resync_start(mddev); | |
8704 | if (ret) | |
8705 | goto skip; | |
8706 | ||
bb8bf15b | 8707 | set_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags); |
41a9a0dc GJ |
8708 | if (!(test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8709 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) || | |
8710 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) | |
8711 | && ((unsigned long long)mddev->curr_resync_completed | |
8712 | < (unsigned long long)mddev->resync_max_sectors)) | |
8713 | goto skip; | |
8714 | } | |
8715 | ||
61df9d91 | 8716 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
c4a39551 | 8717 | if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) { |
61df9d91 | 8718 | desc = "data-check"; |
c4a39551 JB |
8719 | action = "check"; |
8720 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
61df9d91 | 8721 | desc = "requested-resync"; |
c4a39551 JB |
8722 | action = "repair"; |
8723 | } else | |
61df9d91 N |
8724 | desc = "resync"; |
8725 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
8726 | desc = "reshape"; | |
8727 | else | |
8728 | desc = "recovery"; | |
8729 | ||
c4a39551 JB |
8730 | mddev->last_sync_action = action ?: desc; |
8731 | ||
1da177e4 LT |
8732 | /* we overload curr_resync somewhat here. |
8733 | * 0 == not engaged in resync at all | |
8734 | * 2 == checking that there is no conflict with another sync | |
8735 | * 1 == like 2, but have yielded to allow conflicting resync to | |
e5b521ee | 8736 | * commence |
1da177e4 LT |
8737 | * other == active in resync - this many blocks |
8738 | * | |
8739 | * Before starting a resync we must have set curr_resync to | |
8740 | * 2, and then checked that every "conflicting" array has curr_resync | |
8741 | * less than ours. When we find one that is the same or higher | |
8742 | * we wait on resync_wait. To avoid deadlock, we reduce curr_resync | |
8743 | * to 1 if we choose to yield (based arbitrarily on address of mddev structure). | |
8744 | * This will mean we have to start checking from the beginning again. | |
8745 | * | |
8746 | */ | |
8747 | ||
8748 | do { | |
c622ca54 | 8749 | int mddev2_minor = -1; |
1da177e4 LT |
8750 | mddev->curr_resync = 2; |
8751 | ||
8752 | try_again: | |
404e4b43 | 8753 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
1da177e4 | 8754 | goto skip; |
29ac4aa3 | 8755 | for_each_mddev(mddev2, tmp) { |
1da177e4 LT |
8756 | if (mddev2 == mddev) |
8757 | continue; | |
90b08710 BS |
8758 | if (!mddev->parallel_resync |
8759 | && mddev2->curr_resync | |
8760 | && match_mddev_units(mddev, mddev2)) { | |
1da177e4 LT |
8761 | DEFINE_WAIT(wq); |
8762 | if (mddev < mddev2 && mddev->curr_resync == 2) { | |
8763 | /* arbitrarily yield */ | |
8764 | mddev->curr_resync = 1; | |
8765 | wake_up(&resync_wait); | |
8766 | } | |
8767 | if (mddev > mddev2 && mddev->curr_resync == 1) | |
8768 | /* no need to wait here, we can wait the next | |
8769 | * time 'round when curr_resync == 2 | |
8770 | */ | |
8771 | continue; | |
9744197c N |
8772 | /* We need to wait 'interruptible' so as not to |
8773 | * contribute to the load average, and not to | |
8774 | * be caught by 'softlockup' | |
8775 | */ | |
8776 | prepare_to_wait(&resync_wait, &wq, TASK_INTERRUPTIBLE); | |
c91abf5a | 8777 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
8712e553 | 8778 | mddev2->curr_resync >= mddev->curr_resync) { |
c622ca54 AP |
8779 | if (mddev2_minor != mddev2->md_minor) { |
8780 | mddev2_minor = mddev2->md_minor; | |
9d48739e N |
8781 | pr_info("md: delaying %s of %s until %s has finished (they share one or more physical units)\n", |
8782 | desc, mdname(mddev), | |
8783 | mdname(mddev2)); | |
c622ca54 | 8784 | } |
1da177e4 | 8785 | mddev_put(mddev2); |
9744197c N |
8786 | if (signal_pending(current)) |
8787 | flush_signals(current); | |
1da177e4 LT |
8788 | schedule(); |
8789 | finish_wait(&resync_wait, &wq); | |
8790 | goto try_again; | |
8791 | } | |
8792 | finish_wait(&resync_wait, &wq); | |
8793 | } | |
8794 | } | |
8795 | } while (mddev->curr_resync < 2); | |
8796 | ||
5fd6c1dc | 8797 | j = 0; |
9d88883e | 8798 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
1da177e4 | 8799 | /* resync follows the size requested by the personality, |
57afd89f | 8800 | * which defaults to physical size, but can be virtual size |
1da177e4 LT |
8801 | */ |
8802 | max_sectors = mddev->resync_max_sectors; | |
7f7583d4 | 8803 | atomic64_set(&mddev->resync_mismatches, 0); |
5fd6c1dc | 8804 | /* we don't use the checkpoint if there's a bitmap */ |
5e96ee65 NB |
8805 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) |
8806 | j = mddev->resync_min; | |
8807 | else if (!mddev->bitmap) | |
5fd6c1dc | 8808 | j = mddev->recovery_cp; |
5e96ee65 | 8809 | |
cb9ee154 | 8810 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) { |
c804cdec | 8811 | max_sectors = mddev->resync_max_sectors; |
cb9ee154 GJ |
8812 | /* |
8813 | * If the original node aborts reshaping then we continue the | |
8814 | * reshaping, so set j again to avoid restart reshape from the | |
8815 | * first beginning | |
8816 | */ | |
8817 | if (mddev_is_clustered(mddev) && | |
8818 | mddev->reshape_position != MaxSector) | |
8819 | j = mddev->reshape_position; | |
8820 | } else { | |
1da177e4 | 8821 | /* recovery follows the physical size of devices */ |
58c0fed4 | 8822 | max_sectors = mddev->dev_sectors; |
5fd6c1dc | 8823 | j = MaxSector; |
4e59ca7d | 8824 | rcu_read_lock(); |
dafb20fa | 8825 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 8826 | if (rdev->raid_disk >= 0 && |
f2076e7d | 8827 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
8828 | !test_bit(Faulty, &rdev->flags) && |
8829 | !test_bit(In_sync, &rdev->flags) && | |
8830 | rdev->recovery_offset < j) | |
8831 | j = rdev->recovery_offset; | |
4e59ca7d | 8832 | rcu_read_unlock(); |
133d4527 N |
8833 | |
8834 | /* If there is a bitmap, we need to make sure all | |
8835 | * writes that started before we added a spare | |
8836 | * complete before we start doing a recovery. | |
8837 | * Otherwise the write might complete and (via | |
8838 | * bitmap_endwrite) set a bit in the bitmap after the | |
8839 | * recovery has checked that bit and skipped that | |
8840 | * region. | |
8841 | */ | |
8842 | if (mddev->bitmap) { | |
8843 | mddev->pers->quiesce(mddev, 1); | |
8844 | mddev->pers->quiesce(mddev, 0); | |
8845 | } | |
5fd6c1dc | 8846 | } |
1da177e4 | 8847 | |
9d48739e N |
8848 | pr_info("md: %s of RAID array %s\n", desc, mdname(mddev)); |
8849 | pr_debug("md: minimum _guaranteed_ speed: %d KB/sec/disk.\n", speed_min(mddev)); | |
8850 | pr_debug("md: using maximum available idle IO bandwidth (but not more than %d KB/sec) for %s.\n", | |
8851 | speed_max(mddev), desc); | |
1da177e4 | 8852 | |
eea1bf38 | 8853 | is_mddev_idle(mddev, 1); /* this initializes IO event counters */ |
5fd6c1dc | 8854 | |
57afd89f | 8855 | io_sectors = 0; |
1da177e4 LT |
8856 | for (m = 0; m < SYNC_MARKS; m++) { |
8857 | mark[m] = jiffies; | |
57afd89f | 8858 | mark_cnt[m] = io_sectors; |
1da177e4 LT |
8859 | } |
8860 | last_mark = 0; | |
8861 | mddev->resync_mark = mark[last_mark]; | |
8862 | mddev->resync_mark_cnt = mark_cnt[last_mark]; | |
8863 | ||
8864 | /* | |
8865 | * Tune reconstruction: | |
8866 | */ | |
e5b521ee | 8867 | window = 32 * (PAGE_SIZE / 512); |
9d48739e N |
8868 | pr_debug("md: using %dk window, over a total of %lluk.\n", |
8869 | window/2, (unsigned long long)max_sectors/2); | |
1da177e4 LT |
8870 | |
8871 | atomic_set(&mddev->recovery_active, 0); | |
1da177e4 LT |
8872 | last_check = 0; |
8873 | ||
8874 | if (j>2) { | |
9d48739e N |
8875 | pr_debug("md: resuming %s of %s from checkpoint.\n", |
8876 | desc, mdname(mddev)); | |
1da177e4 | 8877 | mddev->curr_resync = j; |
72f36d59 N |
8878 | } else |
8879 | mddev->curr_resync = 3; /* no longer delayed */ | |
75d3da43 | 8880 | mddev->curr_resync_completed = j; |
e1a86dbb | 8881 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
72f36d59 | 8882 | md_new_event(mddev); |
54f89341 | 8883 | update_time = jiffies; |
1da177e4 | 8884 | |
7c2c57c9 | 8885 | blk_start_plug(&plug); |
1da177e4 | 8886 | while (j < max_sectors) { |
57afd89f | 8887 | sector_t sectors; |
1da177e4 | 8888 | |
57afd89f | 8889 | skipped = 0; |
97e4f42d | 8890 | |
7a91ee1f N |
8891 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8892 | ((mddev->curr_resync > mddev->curr_resync_completed && | |
8893 | (mddev->curr_resync - mddev->curr_resync_completed) | |
8894 | > (max_sectors >> 4)) || | |
54f89341 | 8895 | time_after_eq(jiffies, update_time + UPDATE_FREQUENCY) || |
7a91ee1f | 8896 | (j - mddev->curr_resync_completed)*2 |
c5e19d90 N |
8897 | >= mddev->resync_max - mddev->curr_resync_completed || |
8898 | mddev->curr_resync_completed > mddev->resync_max | |
7a91ee1f | 8899 | )) { |
97e4f42d | 8900 | /* time to update curr_resync_completed */ |
97e4f42d N |
8901 | wait_event(mddev->recovery_wait, |
8902 | atomic_read(&mddev->recovery_active) == 0); | |
75d3da43 | 8903 | mddev->curr_resync_completed = j; |
35d78c66 | 8904 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && |
8905 | j > mddev->recovery_cp) | |
8906 | mddev->recovery_cp = j; | |
54f89341 | 8907 | update_time = jiffies; |
2953079c | 8908 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
e1a86dbb | 8909 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
97e4f42d | 8910 | } |
acb180b0 | 8911 | |
c91abf5a N |
8912 | while (j >= mddev->resync_max && |
8913 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
e62e58a5 N |
8914 | /* As this condition is controlled by user-space, |
8915 | * we can block indefinitely, so use '_interruptible' | |
8916 | * to avoid triggering warnings. | |
8917 | */ | |
8918 | flush_signals(current); /* just in case */ | |
8919 | wait_event_interruptible(mddev->recovery_wait, | |
8920 | mddev->resync_max > j | |
c91abf5a N |
8921 | || test_bit(MD_RECOVERY_INTR, |
8922 | &mddev->recovery)); | |
e62e58a5 | 8923 | } |
acb180b0 | 8924 | |
c91abf5a N |
8925 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8926 | break; | |
acb180b0 | 8927 | |
09314799 | 8928 | sectors = mddev->pers->sync_request(mddev, j, &skipped); |
57afd89f | 8929 | if (sectors == 0) { |
dfc70645 | 8930 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
c91abf5a | 8931 | break; |
1da177e4 | 8932 | } |
57afd89f N |
8933 | |
8934 | if (!skipped) { /* actual IO requested */ | |
8935 | io_sectors += sectors; | |
8936 | atomic_add(sectors, &mddev->recovery_active); | |
8937 | } | |
8938 | ||
e875ecea N |
8939 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8940 | break; | |
8941 | ||
1da177e4 | 8942 | j += sectors; |
5ed1df2e N |
8943 | if (j > max_sectors) |
8944 | /* when skipping, extra large numbers can be returned. */ | |
8945 | j = max_sectors; | |
72f36d59 N |
8946 | if (j > 2) |
8947 | mddev->curr_resync = j; | |
ff4e8d9a | 8948 | mddev->curr_mark_cnt = io_sectors; |
d7603b7e | 8949 | if (last_check == 0) |
e875ecea | 8950 | /* this is the earliest that rebuild will be |
d7603b7e N |
8951 | * visible in /proc/mdstat |
8952 | */ | |
8953 | md_new_event(mddev); | |
57afd89f N |
8954 | |
8955 | if (last_check + window > io_sectors || j == max_sectors) | |
1da177e4 LT |
8956 | continue; |
8957 | ||
57afd89f | 8958 | last_check = io_sectors; |
1da177e4 LT |
8959 | repeat: |
8960 | if (time_after_eq(jiffies, mark[last_mark] + SYNC_MARK_STEP )) { | |
8961 | /* step marks */ | |
8962 | int next = (last_mark+1) % SYNC_MARKS; | |
8963 | ||
8964 | mddev->resync_mark = mark[next]; | |
8965 | mddev->resync_mark_cnt = mark_cnt[next]; | |
8966 | mark[next] = jiffies; | |
57afd89f | 8967 | mark_cnt[next] = io_sectors - atomic_read(&mddev->recovery_active); |
1da177e4 LT |
8968 | last_mark = next; |
8969 | } | |
8970 | ||
c91abf5a N |
8971 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8972 | break; | |
1da177e4 LT |
8973 | |
8974 | /* | |
8975 | * this loop exits only if either when we are slower than | |
8976 | * the 'hard' speed limit, or the system was IO-idle for | |
8977 | * a jiffy. | |
8978 | * the system might be non-idle CPU-wise, but we only care | |
8979 | * about not overloading the IO subsystem. (things like an | |
8980 | * e2fsck being done on the RAID array should execute fast) | |
8981 | */ | |
1da177e4 LT |
8982 | cond_resched(); |
8983 | ||
ac7e50a3 XN |
8984 | recovery_done = io_sectors - atomic_read(&mddev->recovery_active); |
8985 | currspeed = ((unsigned long)(recovery_done - mddev->resync_mark_cnt))/2 | |
57afd89f | 8986 | /((jiffies-mddev->resync_mark)/HZ +1) +1; |
1da177e4 | 8987 | |
88202a0c | 8988 | if (currspeed > speed_min(mddev)) { |
ac8fa419 | 8989 | if (currspeed > speed_max(mddev)) { |
c0e48521 | 8990 | msleep(500); |
1da177e4 LT |
8991 | goto repeat; |
8992 | } | |
ac8fa419 N |
8993 | if (!is_mddev_idle(mddev, 0)) { |
8994 | /* | |
8995 | * Give other IO more of a chance. | |
8996 | * The faster the devices, the less we wait. | |
8997 | */ | |
8998 | wait_event(mddev->recovery_wait, | |
8999 | !atomic_read(&mddev->recovery_active)); | |
9000 | } | |
1da177e4 LT |
9001 | } |
9002 | } | |
9d48739e N |
9003 | pr_info("md: %s: %s %s.\n",mdname(mddev), desc, |
9004 | test_bit(MD_RECOVERY_INTR, &mddev->recovery) | |
9005 | ? "interrupted" : "done"); | |
1da177e4 LT |
9006 | /* |
9007 | * this also signals 'finished resyncing' to md_stop | |
9008 | */ | |
7c2c57c9 | 9009 | blk_finish_plug(&plug); |
1da177e4 LT |
9010 | wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active)); |
9011 | ||
5ed1df2e N |
9012 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9013 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
1217e1d1 | 9014 | mddev->curr_resync > 3) { |
5ed1df2e | 9015 | mddev->curr_resync_completed = mddev->curr_resync; |
e1a86dbb | 9016 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
5ed1df2e | 9017 | } |
09314799 | 9018 | mddev->pers->sync_request(mddev, max_sectors, &skipped); |
1da177e4 | 9019 | |
dfc70645 | 9020 | if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) && |
1217e1d1 | 9021 | mddev->curr_resync > 3) { |
5fd6c1dc N |
9022 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
9023 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
9024 | if (mddev->curr_resync >= mddev->recovery_cp) { | |
9d48739e N |
9025 | pr_debug("md: checkpointing %s of %s.\n", |
9026 | desc, mdname(mddev)); | |
0a19caab | 9027 | if (test_bit(MD_RECOVERY_ERROR, |
9028 | &mddev->recovery)) | |
9029 | mddev->recovery_cp = | |
9030 | mddev->curr_resync_completed; | |
9031 | else | |
9032 | mddev->recovery_cp = | |
9033 | mddev->curr_resync; | |
5fd6c1dc N |
9034 | } |
9035 | } else | |
9036 | mddev->recovery_cp = MaxSector; | |
9037 | } else { | |
9038 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) | |
9039 | mddev->curr_resync = MaxSector; | |
db0505d3 N |
9040 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9041 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) { | |
9042 | rcu_read_lock(); | |
9043 | rdev_for_each_rcu(rdev, mddev) | |
9044 | if (rdev->raid_disk >= 0 && | |
9045 | mddev->delta_disks >= 0 && | |
9046 | !test_bit(Journal, &rdev->flags) && | |
9047 | !test_bit(Faulty, &rdev->flags) && | |
9048 | !test_bit(In_sync, &rdev->flags) && | |
9049 | rdev->recovery_offset < mddev->curr_resync) | |
9050 | rdev->recovery_offset = mddev->curr_resync; | |
9051 | rcu_read_unlock(); | |
9052 | } | |
5fd6c1dc | 9053 | } |
1da177e4 | 9054 | } |
db91ff55 | 9055 | skip: |
bb8bf15b GJ |
9056 | /* set CHANGE_PENDING here since maybe another update is needed, |
9057 | * so other nodes are informed. It should be harmless for normal | |
9058 | * raid */ | |
2953079c SL |
9059 | set_mask_bits(&mddev->sb_flags, 0, |
9060 | BIT(MD_SB_CHANGE_PENDING) | BIT(MD_SB_CHANGE_DEVS)); | |
c186b128 | 9061 | |
8876391e BC |
9062 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9063 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
9064 | mddev->delta_disks > 0 && | |
9065 | mddev->pers->finish_reshape && | |
9066 | mddev->pers->size && | |
9067 | mddev->queue) { | |
9068 | mddev_lock_nointr(mddev); | |
9069 | md_set_array_sectors(mddev, mddev->pers->size(mddev, 0, 0)); | |
9070 | mddev_unlock(mddev); | |
2c247c51 CH |
9071 | if (!mddev_is_clustered(mddev)) |
9072 | set_capacity_and_notify(mddev->gendisk, | |
9073 | mddev->array_sectors); | |
8876391e BC |
9074 | } |
9075 | ||
23da422b | 9076 | spin_lock(&mddev->lock); |
c07b70ad N |
9077 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { |
9078 | /* We completed so min/max setting can be forgotten if used. */ | |
9079 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
9080 | mddev->resync_min = 0; | |
9081 | mddev->resync_max = MaxSector; | |
9082 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
9083 | mddev->resync_min = mddev->curr_resync_completed; | |
f7851be7 | 9084 | set_bit(MD_RECOVERY_DONE, &mddev->recovery); |
1da177e4 | 9085 | mddev->curr_resync = 0; |
23da422b N |
9086 | spin_unlock(&mddev->lock); |
9087 | ||
1da177e4 | 9088 | wake_up(&resync_wait); |
1da177e4 | 9089 | md_wakeup_thread(mddev->thread); |
c6207277 | 9090 | return; |
1da177e4 | 9091 | } |
29269553 | 9092 | EXPORT_SYMBOL_GPL(md_do_sync); |
1da177e4 | 9093 | |
746d3207 N |
9094 | static int remove_and_add_spares(struct mddev *mddev, |
9095 | struct md_rdev *this) | |
b4c4c7b8 | 9096 | { |
3cb03002 | 9097 | struct md_rdev *rdev; |
b4c4c7b8 | 9098 | int spares = 0; |
f2a371c5 | 9099 | int removed = 0; |
d787be40 | 9100 | bool remove_some = false; |
b4c4c7b8 | 9101 | |
39772f0a N |
9102 | if (this && test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
9103 | /* Mustn't remove devices when resync thread is running */ | |
9104 | return 0; | |
9105 | ||
d787be40 N |
9106 | rdev_for_each(rdev, mddev) { |
9107 | if ((this == NULL || rdev == this) && | |
9108 | rdev->raid_disk >= 0 && | |
9109 | !test_bit(Blocked, &rdev->flags) && | |
9110 | test_bit(Faulty, &rdev->flags) && | |
9111 | atomic_read(&rdev->nr_pending)==0) { | |
9112 | /* Faulty non-Blocked devices with nr_pending == 0 | |
9113 | * never get nr_pending incremented, | |
9114 | * never get Faulty cleared, and never get Blocked set. | |
9115 | * So we can synchronize_rcu now rather than once per device | |
9116 | */ | |
9117 | remove_some = true; | |
9118 | set_bit(RemoveSynchronized, &rdev->flags); | |
9119 | } | |
9120 | } | |
9121 | ||
9122 | if (remove_some) | |
9123 | synchronize_rcu(); | |
9124 | rdev_for_each(rdev, mddev) { | |
746d3207 N |
9125 | if ((this == NULL || rdev == this) && |
9126 | rdev->raid_disk >= 0 && | |
6bfe0b49 | 9127 | !test_bit(Blocked, &rdev->flags) && |
d787be40 | 9128 | ((test_bit(RemoveSynchronized, &rdev->flags) || |
f2076e7d SL |
9129 | (!test_bit(In_sync, &rdev->flags) && |
9130 | !test_bit(Journal, &rdev->flags))) && | |
d787be40 | 9131 | atomic_read(&rdev->nr_pending)==0)) { |
b4c4c7b8 | 9132 | if (mddev->pers->hot_remove_disk( |
b8321b68 | 9133 | mddev, rdev) == 0) { |
36fad858 | 9134 | sysfs_unlink_rdev(mddev, rdev); |
011abdc9 | 9135 | rdev->saved_raid_disk = rdev->raid_disk; |
b4c4c7b8 | 9136 | rdev->raid_disk = -1; |
f2a371c5 | 9137 | removed++; |
b4c4c7b8 N |
9138 | } |
9139 | } | |
d787be40 N |
9140 | if (remove_some && test_bit(RemoveSynchronized, &rdev->flags)) |
9141 | clear_bit(RemoveSynchronized, &rdev->flags); | |
9142 | } | |
9143 | ||
90584fc9 | 9144 | if (removed && mddev->kobj.sd) |
e1a86dbb | 9145 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
b4c4c7b8 | 9146 | |
2910ff17 | 9147 | if (this && removed) |
746d3207 N |
9148 | goto no_add; |
9149 | ||
dafb20fa | 9150 | rdev_for_each(rdev, mddev) { |
2910ff17 GR |
9151 | if (this && this != rdev) |
9152 | continue; | |
dbb64f86 GR |
9153 | if (test_bit(Candidate, &rdev->flags)) |
9154 | continue; | |
7bfec5f3 N |
9155 | if (rdev->raid_disk >= 0 && |
9156 | !test_bit(In_sync, &rdev->flags) && | |
f2076e7d | 9157 | !test_bit(Journal, &rdev->flags) && |
7bfec5f3 N |
9158 | !test_bit(Faulty, &rdev->flags)) |
9159 | spares++; | |
7ceb17e8 N |
9160 | if (rdev->raid_disk >= 0) |
9161 | continue; | |
9162 | if (test_bit(Faulty, &rdev->flags)) | |
9163 | continue; | |
f6b6ec5c SL |
9164 | if (!test_bit(Journal, &rdev->flags)) { |
9165 | if (mddev->ro && | |
9166 | ! (rdev->saved_raid_disk >= 0 && | |
9167 | !test_bit(Bitmap_sync, &rdev->flags))) | |
9168 | continue; | |
7ceb17e8 | 9169 | |
f6b6ec5c SL |
9170 | rdev->recovery_offset = 0; |
9171 | } | |
3f79cc22 | 9172 | if (mddev->pers->hot_add_disk(mddev, rdev) == 0) { |
5e3b8a8d DLM |
9173 | /* failure here is OK */ |
9174 | sysfs_link_rdev(mddev, rdev); | |
f6b6ec5c SL |
9175 | if (!test_bit(Journal, &rdev->flags)) |
9176 | spares++; | |
7ceb17e8 | 9177 | md_new_event(mddev); |
2953079c | 9178 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
dfc70645 | 9179 | } |
b4c4c7b8 | 9180 | } |
746d3207 | 9181 | no_add: |
6dafab6b | 9182 | if (removed) |
2953079c | 9183 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
b4c4c7b8 N |
9184 | return spares; |
9185 | } | |
7ebc0be7 | 9186 | |
ac05f256 N |
9187 | static void md_start_sync(struct work_struct *ws) |
9188 | { | |
9189 | struct mddev *mddev = container_of(ws, struct mddev, del_work); | |
c186b128 | 9190 | |
ac05f256 N |
9191 | mddev->sync_thread = md_register_thread(md_do_sync, |
9192 | mddev, | |
9193 | "resync"); | |
9194 | if (!mddev->sync_thread) { | |
9d48739e N |
9195 | pr_warn("%s: could not start resync thread...\n", |
9196 | mdname(mddev)); | |
ac05f256 N |
9197 | /* leave the spares where they are, it shouldn't hurt */ |
9198 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
9199 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9200 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9201 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
9202 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 9203 | wake_up(&resync_wait); |
ac05f256 N |
9204 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
9205 | &mddev->recovery)) | |
9206 | if (mddev->sysfs_action) | |
9207 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9208 | } else | |
9209 | md_wakeup_thread(mddev->sync_thread); | |
9210 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9211 | md_new_event(mddev); | |
9212 | } | |
9213 | ||
1da177e4 LT |
9214 | /* |
9215 | * This routine is regularly called by all per-raid-array threads to | |
9216 | * deal with generic issues like resync and super-block update. | |
9217 | * Raid personalities that don't have a thread (linear/raid0) do not | |
9218 | * need this as they never do any recovery or update the superblock. | |
9219 | * | |
9220 | * It does not do any resync itself, but rather "forks" off other threads | |
9221 | * to do that as needed. | |
9222 | * When it is determined that resync is needed, we set MD_RECOVERY_RUNNING in | |
9223 | * "->recovery" and create a thread at ->sync_thread. | |
dfc70645 | 9224 | * When the thread finishes it sets MD_RECOVERY_DONE |
1da177e4 LT |
9225 | * and wakeups up this thread which will reap the thread and finish up. |
9226 | * This thread also removes any faulty devices (with nr_pending == 0). | |
9227 | * | |
9228 | * The overall approach is: | |
9229 | * 1/ if the superblock needs updating, update it. | |
9230 | * 2/ If a recovery thread is running, don't do anything else. | |
9231 | * 3/ If recovery has finished, clean up, possibly marking spares active. | |
9232 | * 4/ If there are any faulty devices, remove them. | |
9233 | * 5/ If array is degraded, try to add spares devices | |
9234 | * 6/ If array has spares or is not in-sync, start a resync thread. | |
9235 | */ | |
fd01b88c | 9236 | void md_check_recovery(struct mddev *mddev) |
1da177e4 | 9237 | { |
059421e0 N |
9238 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags) && mddev->sb_flags) { |
9239 | /* Write superblock - thread that called mddev_suspend() | |
9240 | * holds reconfig_mutex for us. | |
9241 | */ | |
9242 | set_bit(MD_UPDATING_SB, &mddev->flags); | |
9243 | smp_mb__after_atomic(); | |
9244 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags)) | |
9245 | md_update_sb(mddev, 0); | |
9246 | clear_bit_unlock(MD_UPDATING_SB, &mddev->flags); | |
9247 | wake_up(&mddev->sb_wait); | |
9248 | } | |
9249 | ||
68866e42 JB |
9250 | if (mddev->suspended) |
9251 | return; | |
9252 | ||
5f40402d | 9253 | if (mddev->bitmap) |
e64e4018 | 9254 | md_bitmap_daemon_work(mddev); |
1da177e4 | 9255 | |
fca4d848 | 9256 | if (signal_pending(current)) { |
31a59e34 | 9257 | if (mddev->pers->sync_request && !mddev->external) { |
9d48739e N |
9258 | pr_debug("md: %s in immediate safe mode\n", |
9259 | mdname(mddev)); | |
fca4d848 N |
9260 | mddev->safemode = 2; |
9261 | } | |
9262 | flush_signals(current); | |
9263 | } | |
9264 | ||
c89a8eee N |
9265 | if (mddev->ro && !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) |
9266 | return; | |
1da177e4 | 9267 | if ( ! ( |
2953079c | 9268 | (mddev->sb_flags & ~ (1<<MD_SB_CHANGE_PENDING)) || |
1da177e4 | 9269 | test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
fca4d848 | 9270 | test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
31a59e34 | 9271 | (mddev->external == 0 && mddev->safemode == 1) || |
4ad23a97 | 9272 | (mddev->safemode == 2 |
fca4d848 | 9273 | && !mddev->in_sync && mddev->recovery_cp == MaxSector) |
1da177e4 LT |
9274 | )) |
9275 | return; | |
fca4d848 | 9276 | |
df5b89b3 | 9277 | if (mddev_trylock(mddev)) { |
b4c4c7b8 | 9278 | int spares = 0; |
480523fe | 9279 | bool try_set_sync = mddev->safemode != 0; |
fca4d848 | 9280 | |
afc1f55c | 9281 | if (!mddev->external && mddev->safemode == 1) |
33182d15 N |
9282 | mddev->safemode = 0; |
9283 | ||
c89a8eee | 9284 | if (mddev->ro) { |
ab16bfc7 NB |
9285 | struct md_rdev *rdev; |
9286 | if (!mddev->external && mddev->in_sync) | |
9287 | /* 'Blocked' flag not needed as failed devices | |
9288 | * will be recorded if array switched to read/write. | |
9289 | * Leaving it set will prevent the device | |
9290 | * from being removed. | |
9291 | */ | |
9292 | rdev_for_each(rdev, mddev) | |
9293 | clear_bit(Blocked, &rdev->flags); | |
7ceb17e8 N |
9294 | /* On a read-only array we can: |
9295 | * - remove failed devices | |
9296 | * - add already-in_sync devices if the array itself | |
9297 | * is in-sync. | |
9298 | * As we only add devices that are already in-sync, | |
9299 | * we can activate the spares immediately. | |
c89a8eee | 9300 | */ |
7ceb17e8 | 9301 | remove_and_add_spares(mddev, NULL); |
8313b8e5 N |
9302 | /* There is no thread, but we need to call |
9303 | * ->spare_active and clear saved_raid_disk | |
9304 | */ | |
2ac295a5 | 9305 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8313b8e5 | 9306 | md_reap_sync_thread(mddev); |
a4a3d26d | 9307 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
8313b8e5 | 9308 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
2953079c | 9309 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
c89a8eee N |
9310 | goto unlock; |
9311 | } | |
9312 | ||
659b254f | 9313 | if (mddev_is_clustered(mddev)) { |
f7c7a2f9 | 9314 | struct md_rdev *rdev, *tmp; |
659b254f GJ |
9315 | /* kick the device if another node issued a |
9316 | * remove disk. | |
9317 | */ | |
f7c7a2f9 | 9318 | rdev_for_each_safe(rdev, tmp, mddev) { |
659b254f GJ |
9319 | if (test_and_clear_bit(ClusterRemove, &rdev->flags) && |
9320 | rdev->raid_disk < 0) | |
9321 | md_kick_rdev_from_array(rdev); | |
9322 | } | |
9323 | } | |
9324 | ||
480523fe | 9325 | if (try_set_sync && !mddev->external && !mddev->in_sync) { |
85572d7c | 9326 | spin_lock(&mddev->lock); |
6497709b | 9327 | set_in_sync(mddev); |
85572d7c | 9328 | spin_unlock(&mddev->lock); |
fca4d848 | 9329 | } |
fca4d848 | 9330 | |
2953079c | 9331 | if (mddev->sb_flags) |
850b2b42 | 9332 | md_update_sb(mddev, 0); |
06d91a5f | 9333 | |
1da177e4 LT |
9334 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
9335 | !test_bit(MD_RECOVERY_DONE, &mddev->recovery)) { | |
9336 | /* resync/recovery still happening */ | |
9337 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9338 | goto unlock; | |
9339 | } | |
9340 | if (mddev->sync_thread) { | |
a91d5ac0 | 9341 | md_reap_sync_thread(mddev); |
1da177e4 LT |
9342 | goto unlock; |
9343 | } | |
72a23c21 NB |
9344 | /* Set RUNNING before clearing NEEDED to avoid |
9345 | * any transients in the value of "sync_action". | |
9346 | */ | |
72f36d59 | 9347 | mddev->curr_resync_completed = 0; |
23da422b | 9348 | spin_lock(&mddev->lock); |
72a23c21 | 9349 | set_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
23da422b | 9350 | spin_unlock(&mddev->lock); |
24dd469d N |
9351 | /* Clear some bits that don't mean anything, but |
9352 | * might be left set | |
9353 | */ | |
24dd469d N |
9354 | clear_bit(MD_RECOVERY_INTR, &mddev->recovery); |
9355 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); | |
1da177e4 | 9356 | |
ed209584 N |
9357 | if (!test_and_clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
9358 | test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) | |
ac05f256 | 9359 | goto not_running; |
1da177e4 LT |
9360 | /* no recovery is running. |
9361 | * remove any failed drives, then | |
9362 | * add spares if possible. | |
72f36d59 | 9363 | * Spares are also removed and re-added, to allow |
1da177e4 LT |
9364 | * the personality to fail the re-add. |
9365 | */ | |
1da177e4 | 9366 | |
b4c4c7b8 | 9367 | if (mddev->reshape_position != MaxSector) { |
50ac168a N |
9368 | if (mddev->pers->check_reshape == NULL || |
9369 | mddev->pers->check_reshape(mddev) != 0) | |
b4c4c7b8 | 9370 | /* Cannot proceed */ |
ac05f256 | 9371 | goto not_running; |
b4c4c7b8 | 9372 | set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); |
72a23c21 | 9373 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
746d3207 | 9374 | } else if ((spares = remove_and_add_spares(mddev, NULL))) { |
24dd469d N |
9375 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9376 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
56ac36d7 | 9377 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
72a23c21 | 9378 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9379 | } else if (mddev->recovery_cp < MaxSector) { |
9380 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
72a23c21 | 9381 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9382 | } else if (!test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) |
9383 | /* nothing to be done ... */ | |
ac05f256 | 9384 | goto not_running; |
24dd469d | 9385 | |
1da177e4 | 9386 | if (mddev->pers->sync_request) { |
ef99bf48 | 9387 | if (spares) { |
a654b9d8 N |
9388 | /* We are adding a device or devices to an array |
9389 | * which has the bitmap stored on all devices. | |
9390 | * So make sure all bitmap pages get written | |
9391 | */ | |
e64e4018 | 9392 | md_bitmap_write_all(mddev->bitmap); |
a654b9d8 | 9393 | } |
ac05f256 N |
9394 | INIT_WORK(&mddev->del_work, md_start_sync); |
9395 | queue_work(md_misc_wq, &mddev->del_work); | |
9396 | goto unlock; | |
1da177e4 | 9397 | } |
ac05f256 | 9398 | not_running: |
72a23c21 NB |
9399 | if (!mddev->sync_thread) { |
9400 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 9401 | wake_up(&resync_wait); |
72a23c21 NB |
9402 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
9403 | &mddev->recovery)) | |
0c3573f1 | 9404 | if (mddev->sysfs_action) |
00bcb4ac | 9405 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
72a23c21 | 9406 | } |
ac05f256 N |
9407 | unlock: |
9408 | wake_up(&mddev->sb_wait); | |
1da177e4 LT |
9409 | mddev_unlock(mddev); |
9410 | } | |
9411 | } | |
6c144d31 | 9412 | EXPORT_SYMBOL(md_check_recovery); |
1da177e4 | 9413 | |
a91d5ac0 JB |
9414 | void md_reap_sync_thread(struct mddev *mddev) |
9415 | { | |
9416 | struct md_rdev *rdev; | |
aefb2e5f GJ |
9417 | sector_t old_dev_sectors = mddev->dev_sectors; |
9418 | bool is_reshaped = false; | |
a91d5ac0 JB |
9419 | |
9420 | /* resync has finished, collect result */ | |
9421 | md_unregister_thread(&mddev->sync_thread); | |
9422 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
0d8ed0e9 GJ |
9423 | !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery) && |
9424 | mddev->degraded != mddev->raid_disks) { | |
a91d5ac0 JB |
9425 | /* success...*/ |
9426 | /* activate any spares */ | |
9427 | if (mddev->pers->spare_active(mddev)) { | |
e1a86dbb | 9428 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
2953079c | 9429 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a91d5ac0 JB |
9430 | } |
9431 | } | |
9432 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
aefb2e5f | 9433 | mddev->pers->finish_reshape) { |
a91d5ac0 | 9434 | mddev->pers->finish_reshape(mddev); |
aefb2e5f GJ |
9435 | if (mddev_is_clustered(mddev)) |
9436 | is_reshaped = true; | |
9437 | } | |
a91d5ac0 JB |
9438 | |
9439 | /* If array is no-longer degraded, then any saved_raid_disk | |
f466722c | 9440 | * information must be scrapped. |
a91d5ac0 | 9441 | */ |
f466722c N |
9442 | if (!mddev->degraded) |
9443 | rdev_for_each(rdev, mddev) | |
a91d5ac0 JB |
9444 | rdev->saved_raid_disk = -1; |
9445 | ||
9446 | md_update_sb(mddev, 1); | |
2953079c | 9447 | /* MD_SB_CHANGE_PENDING should be cleared by md_update_sb, so we can |
bb8bf15b GJ |
9448 | * call resync_finish here if MD_CLUSTER_RESYNC_LOCKED is set by |
9449 | * clustered raid */ | |
9450 | if (test_and_clear_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags)) | |
9451 | md_cluster_ops->resync_finish(mddev); | |
a91d5ac0 | 9452 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
ea358cd0 | 9453 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); |
a91d5ac0 JB |
9454 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9455 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9456 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9457 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
aefb2e5f GJ |
9458 | /* |
9459 | * We call md_cluster_ops->update_size here because sync_size could | |
9460 | * be changed by md_update_sb, and MD_RECOVERY_RESHAPE is cleared, | |
9461 | * so it is time to update size across cluster. | |
9462 | */ | |
9463 | if (mddev_is_clustered(mddev) && is_reshaped | |
9464 | && !test_bit(MD_CLOSING, &mddev->flags)) | |
9465 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
f851b60d | 9466 | wake_up(&resync_wait); |
a91d5ac0 JB |
9467 | /* flag recovery needed just to double check */ |
9468 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9469 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9470 | md_new_event(mddev); | |
9471 | if (mddev->event_work.func) | |
9472 | queue_work(md_misc_wq, &mddev->event_work); | |
9473 | } | |
6c144d31 | 9474 | EXPORT_SYMBOL(md_reap_sync_thread); |
a91d5ac0 | 9475 | |
fd01b88c | 9476 | void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev) |
6bfe0b49 | 9477 | { |
00bcb4ac | 9478 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
6bfe0b49 | 9479 | wait_event_timeout(rdev->blocked_wait, |
de393cde N |
9480 | !test_bit(Blocked, &rdev->flags) && |
9481 | !test_bit(BlockedBadBlocks, &rdev->flags), | |
6bfe0b49 DW |
9482 | msecs_to_jiffies(5000)); |
9483 | rdev_dec_pending(rdev, mddev); | |
9484 | } | |
9485 | EXPORT_SYMBOL(md_wait_for_blocked_rdev); | |
9486 | ||
c6563a8c N |
9487 | void md_finish_reshape(struct mddev *mddev) |
9488 | { | |
9489 | /* called be personality module when reshape completes. */ | |
9490 | struct md_rdev *rdev; | |
9491 | ||
9492 | rdev_for_each(rdev, mddev) { | |
9493 | if (rdev->data_offset > rdev->new_data_offset) | |
9494 | rdev->sectors += rdev->data_offset - rdev->new_data_offset; | |
9495 | else | |
9496 | rdev->sectors -= rdev->new_data_offset - rdev->data_offset; | |
9497 | rdev->data_offset = rdev->new_data_offset; | |
9498 | } | |
9499 | } | |
9500 | EXPORT_SYMBOL(md_finish_reshape); | |
2230dfe4 | 9501 | |
fc974ee2 | 9502 | /* Bad block management */ |
2230dfe4 | 9503 | |
fc974ee2 | 9504 | /* Returns 1 on success, 0 on failure */ |
3cb03002 | 9505 | int rdev_set_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
c6563a8c | 9506 | int is_new) |
2230dfe4 | 9507 | { |
85ad1d13 | 9508 | struct mddev *mddev = rdev->mddev; |
c6563a8c N |
9509 | int rv; |
9510 | if (is_new) | |
9511 | s += rdev->new_data_offset; | |
9512 | else | |
9513 | s += rdev->data_offset; | |
fc974ee2 VV |
9514 | rv = badblocks_set(&rdev->badblocks, s, sectors, 0); |
9515 | if (rv == 0) { | |
2230dfe4 | 9516 | /* Make sure they get written out promptly */ |
35b785f7 | 9517 | if (test_bit(ExternalBbl, &rdev->flags)) |
e1a86dbb | 9518 | sysfs_notify_dirent_safe(rdev->sysfs_unack_badblocks); |
8bd2f0a0 | 9519 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
2953079c SL |
9520 | set_mask_bits(&mddev->sb_flags, 0, |
9521 | BIT(MD_SB_CHANGE_CLEAN) | BIT(MD_SB_CHANGE_PENDING)); | |
2230dfe4 | 9522 | md_wakeup_thread(rdev->mddev->thread); |
fc974ee2 VV |
9523 | return 1; |
9524 | } else | |
9525 | return 0; | |
2230dfe4 N |
9526 | } |
9527 | EXPORT_SYMBOL_GPL(rdev_set_badblocks); | |
9528 | ||
c6563a8c N |
9529 | int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
9530 | int is_new) | |
2230dfe4 | 9531 | { |
35b785f7 | 9532 | int rv; |
c6563a8c N |
9533 | if (is_new) |
9534 | s += rdev->new_data_offset; | |
9535 | else | |
9536 | s += rdev->data_offset; | |
35b785f7 TM |
9537 | rv = badblocks_clear(&rdev->badblocks, s, sectors); |
9538 | if ((rv == 0) && test_bit(ExternalBbl, &rdev->flags)) | |
e1a86dbb | 9539 | sysfs_notify_dirent_safe(rdev->sysfs_badblocks); |
35b785f7 | 9540 | return rv; |
2230dfe4 N |
9541 | } |
9542 | EXPORT_SYMBOL_GPL(rdev_clear_badblocks); | |
9543 | ||
75c96f85 AB |
9544 | static int md_notify_reboot(struct notifier_block *this, |
9545 | unsigned long code, void *x) | |
1da177e4 LT |
9546 | { |
9547 | struct list_head *tmp; | |
fd01b88c | 9548 | struct mddev *mddev; |
2dba6a91 | 9549 | int need_delay = 0; |
1da177e4 | 9550 | |
c744a65c N |
9551 | for_each_mddev(mddev, tmp) { |
9552 | if (mddev_trylock(mddev)) { | |
30b8aa91 N |
9553 | if (mddev->pers) |
9554 | __md_stop_writes(mddev); | |
0f62fb22 N |
9555 | if (mddev->persistent) |
9556 | mddev->safemode = 2; | |
c744a65c | 9557 | mddev_unlock(mddev); |
2dba6a91 | 9558 | } |
c744a65c | 9559 | need_delay = 1; |
1da177e4 | 9560 | } |
c744a65c N |
9561 | /* |
9562 | * certain more exotic SCSI devices are known to be | |
9563 | * volatile wrt too early system reboots. While the | |
9564 | * right place to handle this issue is the given | |
9565 | * driver, we do want to have a safe RAID driver ... | |
9566 | */ | |
9567 | if (need_delay) | |
9568 | mdelay(1000*1); | |
9569 | ||
1da177e4 LT |
9570 | return NOTIFY_DONE; |
9571 | } | |
9572 | ||
75c96f85 | 9573 | static struct notifier_block md_notifier = { |
1da177e4 LT |
9574 | .notifier_call = md_notify_reboot, |
9575 | .next = NULL, | |
9576 | .priority = INT_MAX, /* before any real devices */ | |
9577 | }; | |
9578 | ||
9579 | static void md_geninit(void) | |
9580 | { | |
36a4e1fe | 9581 | pr_debug("md: sizeof(mdp_super_t) = %d\n", (int)sizeof(mdp_super_t)); |
1da177e4 | 9582 | |
97a32539 | 9583 | proc_create("mdstat", S_IRUGO, NULL, &mdstat_proc_ops); |
1da177e4 LT |
9584 | } |
9585 | ||
75c96f85 | 9586 | static int __init md_init(void) |
1da177e4 | 9587 | { |
e804ac78 TH |
9588 | int ret = -ENOMEM; |
9589 | ||
ada609ee | 9590 | md_wq = alloc_workqueue("md", WQ_MEM_RECLAIM, 0); |
e804ac78 TH |
9591 | if (!md_wq) |
9592 | goto err_wq; | |
9593 | ||
9594 | md_misc_wq = alloc_workqueue("md_misc", 0, 0); | |
9595 | if (!md_misc_wq) | |
9596 | goto err_misc_wq; | |
9597 | ||
cc1ffe61 | 9598 | md_rdev_misc_wq = alloc_workqueue("md_rdev_misc", 0, 0); |
cf0b9b48 | 9599 | if (!md_rdev_misc_wq) |
cc1ffe61 GJ |
9600 | goto err_rdev_misc_wq; |
9601 | ||
28144f99 CH |
9602 | ret = __register_blkdev(MD_MAJOR, "md", md_probe); |
9603 | if (ret < 0) | |
e804ac78 TH |
9604 | goto err_md; |
9605 | ||
28144f99 CH |
9606 | ret = __register_blkdev(0, "mdp", md_probe); |
9607 | if (ret < 0) | |
e804ac78 TH |
9608 | goto err_mdp; |
9609 | mdp_major = ret; | |
9610 | ||
1da177e4 | 9611 | register_reboot_notifier(&md_notifier); |
0b4d4147 | 9612 | raid_table_header = register_sysctl_table(raid_root_table); |
1da177e4 LT |
9613 | |
9614 | md_geninit(); | |
d710e138 | 9615 | return 0; |
1da177e4 | 9616 | |
e804ac78 TH |
9617 | err_mdp: |
9618 | unregister_blkdev(MD_MAJOR, "md"); | |
9619 | err_md: | |
cc1ffe61 GJ |
9620 | destroy_workqueue(md_rdev_misc_wq); |
9621 | err_rdev_misc_wq: | |
e804ac78 TH |
9622 | destroy_workqueue(md_misc_wq); |
9623 | err_misc_wq: | |
9624 | destroy_workqueue(md_wq); | |
9625 | err_wq: | |
9626 | return ret; | |
9627 | } | |
1da177e4 | 9628 | |
70bcecdb | 9629 | static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev) |
1d7e3e96 | 9630 | { |
70bcecdb | 9631 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
f7c7a2f9 | 9632 | struct md_rdev *rdev2, *tmp; |
70bcecdb GR |
9633 | int role, ret; |
9634 | char b[BDEVNAME_SIZE]; | |
1d7e3e96 | 9635 | |
818da59f GJ |
9636 | /* |
9637 | * If size is changed in another node then we need to | |
9638 | * do resize as well. | |
9639 | */ | |
9640 | if (mddev->dev_sectors != le64_to_cpu(sb->size)) { | |
9641 | ret = mddev->pers->resize(mddev, le64_to_cpu(sb->size)); | |
9642 | if (ret) | |
9643 | pr_info("md-cluster: resize failed\n"); | |
9644 | else | |
e64e4018 | 9645 | md_bitmap_update_sb(mddev->bitmap); |
818da59f GJ |
9646 | } |
9647 | ||
70bcecdb | 9648 | /* Check for change of roles in the active devices */ |
f7c7a2f9 | 9649 | rdev_for_each_safe(rdev2, tmp, mddev) { |
70bcecdb GR |
9650 | if (test_bit(Faulty, &rdev2->flags)) |
9651 | continue; | |
9652 | ||
9653 | /* Check if the roles changed */ | |
9654 | role = le16_to_cpu(sb->dev_roles[rdev2->desc_nr]); | |
dbb64f86 GR |
9655 | |
9656 | if (test_bit(Candidate, &rdev2->flags)) { | |
9657 | if (role == 0xfffe) { | |
9658 | pr_info("md: Removing Candidate device %s because add failed\n", bdevname(rdev2->bdev,b)); | |
9659 | md_kick_rdev_from_array(rdev2); | |
9660 | continue; | |
9661 | } | |
9662 | else | |
9663 | clear_bit(Candidate, &rdev2->flags); | |
9664 | } | |
9665 | ||
70bcecdb | 9666 | if (role != rdev2->raid_disk) { |
ca1e98e0 GJ |
9667 | /* |
9668 | * got activated except reshape is happening. | |
9669 | */ | |
9670 | if (rdev2->raid_disk == -1 && role != 0xffff && | |
9671 | !(le32_to_cpu(sb->feature_map) & | |
9672 | MD_FEATURE_RESHAPE_ACTIVE)) { | |
70bcecdb GR |
9673 | rdev2->saved_raid_disk = role; |
9674 | ret = remove_and_add_spares(mddev, rdev2); | |
9675 | pr_info("Activated spare: %s\n", | |
9d48739e | 9676 | bdevname(rdev2->bdev,b)); |
a578183e GJ |
9677 | /* wakeup mddev->thread here, so array could |
9678 | * perform resync with the new activated disk */ | |
9679 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9680 | md_wakeup_thread(mddev->thread); | |
70bcecdb GR |
9681 | } |
9682 | /* device faulty | |
9683 | * We just want to do the minimum to mark the disk | |
9684 | * as faulty. The recovery is performed by the | |
9685 | * one who initiated the error. | |
9686 | */ | |
9687 | if ((role == 0xfffe) || (role == 0xfffd)) { | |
9688 | md_error(mddev, rdev2); | |
9689 | clear_bit(Blocked, &rdev2->flags); | |
9690 | } | |
9691 | } | |
1d7e3e96 | 9692 | } |
70bcecdb | 9693 | |
a8da01f7 ZH |
9694 | if (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) { |
9695 | ret = update_raid_disks(mddev, le32_to_cpu(sb->raid_disks)); | |
9696 | if (ret) | |
9697 | pr_warn("md: updating array disks failed. %d\n", ret); | |
9698 | } | |
70bcecdb | 9699 | |
7564beda GJ |
9700 | /* |
9701 | * Since mddev->delta_disks has already updated in update_raid_disks, | |
9702 | * so it is time to check reshape. | |
9703 | */ | |
9704 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9705 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9706 | /* | |
9707 | * reshape is happening in the remote node, we need to | |
9708 | * update reshape_position and call start_reshape. | |
9709 | */ | |
ed4d0a4e | 9710 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); |
7564beda GJ |
9711 | if (mddev->pers->update_reshape_pos) |
9712 | mddev->pers->update_reshape_pos(mddev); | |
9713 | if (mddev->pers->start_reshape) | |
9714 | mddev->pers->start_reshape(mddev); | |
9715 | } else if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9716 | mddev->reshape_position != MaxSector && | |
9717 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9718 | /* reshape is just done in another node. */ | |
9719 | mddev->reshape_position = MaxSector; | |
9720 | if (mddev->pers->update_reshape_pos) | |
9721 | mddev->pers->update_reshape_pos(mddev); | |
9722 | } | |
9723 | ||
70bcecdb GR |
9724 | /* Finally set the event to be up to date */ |
9725 | mddev->events = le64_to_cpu(sb->events); | |
9726 | } | |
9727 | ||
9728 | static int read_rdev(struct mddev *mddev, struct md_rdev *rdev) | |
9729 | { | |
9730 | int err; | |
9731 | struct page *swapout = rdev->sb_page; | |
9732 | struct mdp_superblock_1 *sb; | |
9733 | ||
9734 | /* Store the sb page of the rdev in the swapout temporary | |
9735 | * variable in case we err in the future | |
9736 | */ | |
9737 | rdev->sb_page = NULL; | |
7f0f0d87 N |
9738 | err = alloc_disk_sb(rdev); |
9739 | if (err == 0) { | |
9740 | ClearPageUptodate(rdev->sb_page); | |
9741 | rdev->sb_loaded = 0; | |
9742 | err = super_types[mddev->major_version]. | |
9743 | load_super(rdev, NULL, mddev->minor_version); | |
9744 | } | |
70bcecdb GR |
9745 | if (err < 0) { |
9746 | pr_warn("%s: %d Could not reload rdev(%d) err: %d. Restoring old values\n", | |
9747 | __func__, __LINE__, rdev->desc_nr, err); | |
7f0f0d87 N |
9748 | if (rdev->sb_page) |
9749 | put_page(rdev->sb_page); | |
70bcecdb GR |
9750 | rdev->sb_page = swapout; |
9751 | rdev->sb_loaded = 1; | |
9752 | return err; | |
1d7e3e96 GR |
9753 | } |
9754 | ||
70bcecdb GR |
9755 | sb = page_address(rdev->sb_page); |
9756 | /* Read the offset unconditionally, even if MD_FEATURE_RECOVERY_OFFSET | |
9757 | * is not set | |
9758 | */ | |
9759 | ||
9760 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)) | |
9761 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); | |
9762 | ||
9763 | /* The other node finished recovery, call spare_active to set | |
9764 | * device In_sync and mddev->degraded | |
9765 | */ | |
9766 | if (rdev->recovery_offset == MaxSector && | |
9767 | !test_bit(In_sync, &rdev->flags) && | |
9768 | mddev->pers->spare_active(mddev)) | |
e1a86dbb | 9769 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
70bcecdb GR |
9770 | |
9771 | put_page(swapout); | |
9772 | return 0; | |
9773 | } | |
9774 | ||
9775 | void md_reload_sb(struct mddev *mddev, int nr) | |
9776 | { | |
e03a5e53 | 9777 | struct md_rdev *rdev = NULL, *iter; |
70bcecdb GR |
9778 | int err; |
9779 | ||
9780 | /* Find the rdev */ | |
e03a5e53 XT |
9781 | rdev_for_each_rcu(iter, mddev) { |
9782 | if (iter->desc_nr == nr) { | |
9783 | rdev = iter; | |
70bcecdb | 9784 | break; |
e03a5e53 | 9785 | } |
70bcecdb GR |
9786 | } |
9787 | ||
e03a5e53 | 9788 | if (!rdev) { |
70bcecdb GR |
9789 | pr_warn("%s: %d Could not find rdev with nr %d\n", __func__, __LINE__, nr); |
9790 | return; | |
9791 | } | |
9792 | ||
9793 | err = read_rdev(mddev, rdev); | |
9794 | if (err < 0) | |
9795 | return; | |
9796 | ||
9797 | check_sb_changes(mddev, rdev); | |
9798 | ||
9799 | /* Read all rdev's to update recovery_offset */ | |
0ea9924a GJ |
9800 | rdev_for_each_rcu(rdev, mddev) { |
9801 | if (!test_bit(Faulty, &rdev->flags)) | |
9802 | read_rdev(mddev, rdev); | |
9803 | } | |
1d7e3e96 GR |
9804 | } |
9805 | EXPORT_SYMBOL(md_reload_sb); | |
9806 | ||
1da177e4 LT |
9807 | #ifndef MODULE |
9808 | ||
9809 | /* | |
9810 | * Searches all registered partitions for autorun RAID arrays | |
9811 | * at boot time. | |
9812 | */ | |
4d936ec1 | 9813 | |
5b1f5bc3 | 9814 | static DEFINE_MUTEX(detected_devices_mutex); |
4d936ec1 ME |
9815 | static LIST_HEAD(all_detected_devices); |
9816 | struct detected_devices_node { | |
9817 | struct list_head list; | |
9818 | dev_t dev; | |
9819 | }; | |
1da177e4 LT |
9820 | |
9821 | void md_autodetect_dev(dev_t dev) | |
9822 | { | |
4d936ec1 ME |
9823 | struct detected_devices_node *node_detected_dev; |
9824 | ||
9825 | node_detected_dev = kzalloc(sizeof(*node_detected_dev), GFP_KERNEL); | |
9826 | if (node_detected_dev) { | |
9827 | node_detected_dev->dev = dev; | |
5b1f5bc3 | 9828 | mutex_lock(&detected_devices_mutex); |
4d936ec1 | 9829 | list_add_tail(&node_detected_dev->list, &all_detected_devices); |
5b1f5bc3 | 9830 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9831 | } |
1da177e4 LT |
9832 | } |
9833 | ||
d82fa81c | 9834 | void md_autostart_arrays(int part) |
1da177e4 | 9835 | { |
3cb03002 | 9836 | struct md_rdev *rdev; |
4d936ec1 ME |
9837 | struct detected_devices_node *node_detected_dev; |
9838 | dev_t dev; | |
9839 | int i_scanned, i_passed; | |
1da177e4 | 9840 | |
4d936ec1 ME |
9841 | i_scanned = 0; |
9842 | i_passed = 0; | |
1da177e4 | 9843 | |
9d48739e | 9844 | pr_info("md: Autodetecting RAID arrays.\n"); |
1da177e4 | 9845 | |
5b1f5bc3 | 9846 | mutex_lock(&detected_devices_mutex); |
4d936ec1 ME |
9847 | while (!list_empty(&all_detected_devices) && i_scanned < INT_MAX) { |
9848 | i_scanned++; | |
9849 | node_detected_dev = list_entry(all_detected_devices.next, | |
9850 | struct detected_devices_node, list); | |
9851 | list_del(&node_detected_dev->list); | |
9852 | dev = node_detected_dev->dev; | |
9853 | kfree(node_detected_dev); | |
90bcf133 | 9854 | mutex_unlock(&detected_devices_mutex); |
df968c4e | 9855 | rdev = md_import_device(dev,0, 90); |
90bcf133 | 9856 | mutex_lock(&detected_devices_mutex); |
1da177e4 LT |
9857 | if (IS_ERR(rdev)) |
9858 | continue; | |
9859 | ||
403df478 | 9860 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 9861 | continue; |
403df478 | 9862 | |
d0fae18f | 9863 | set_bit(AutoDetected, &rdev->flags); |
1da177e4 | 9864 | list_add(&rdev->same_set, &pending_raid_disks); |
4d936ec1 | 9865 | i_passed++; |
1da177e4 | 9866 | } |
5b1f5bc3 | 9867 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9868 | |
9d48739e | 9869 | pr_debug("md: Scanned %d and added %d devices.\n", i_scanned, i_passed); |
1da177e4 LT |
9870 | |
9871 | autorun_devices(part); | |
9872 | } | |
9873 | ||
fdee8ae4 | 9874 | #endif /* !MODULE */ |
1da177e4 LT |
9875 | |
9876 | static __exit void md_exit(void) | |
9877 | { | |
fd01b88c | 9878 | struct mddev *mddev; |
1da177e4 | 9879 | struct list_head *tmp; |
e2f23b60 | 9880 | int delay = 1; |
8ab5e4c1 | 9881 | |
3dbd8c2e | 9882 | unregister_blkdev(MD_MAJOR,"md"); |
1da177e4 LT |
9883 | unregister_blkdev(mdp_major, "mdp"); |
9884 | unregister_reboot_notifier(&md_notifier); | |
9885 | unregister_sysctl_table(raid_table_header); | |
e2f23b60 N |
9886 | |
9887 | /* We cannot unload the modules while some process is | |
9888 | * waiting for us in select() or poll() - wake them up | |
9889 | */ | |
9890 | md_unloading = 1; | |
9891 | while (waitqueue_active(&md_event_waiters)) { | |
9892 | /* not safe to leave yet */ | |
9893 | wake_up(&md_event_waiters); | |
9894 | msleep(delay); | |
9895 | delay += delay; | |
9896 | } | |
1da177e4 | 9897 | remove_proc_entry("mdstat", NULL); |
e2f23b60 | 9898 | |
29ac4aa3 | 9899 | for_each_mddev(mddev, tmp) { |
1da177e4 | 9900 | export_array(mddev); |
9356863c | 9901 | mddev->ctime = 0; |
d3374825 | 9902 | mddev->hold_active = 0; |
9356863c N |
9903 | /* |
9904 | * for_each_mddev() will call mddev_put() at the end of each | |
9905 | * iteration. As the mddev is now fully clear, this will | |
9906 | * schedule the mddev for destruction by a workqueue, and the | |
9907 | * destroy_workqueue() below will wait for that to complete. | |
9908 | */ | |
1da177e4 | 9909 | } |
cc1ffe61 | 9910 | destroy_workqueue(md_rdev_misc_wq); |
e804ac78 TH |
9911 | destroy_workqueue(md_misc_wq); |
9912 | destroy_workqueue(md_wq); | |
1da177e4 LT |
9913 | } |
9914 | ||
685784aa | 9915 | subsys_initcall(md_init); |
1da177e4 LT |
9916 | module_exit(md_exit) |
9917 | ||
e4dca7b7 | 9918 | static int get_ro(char *buffer, const struct kernel_param *kp) |
f91de92e | 9919 | { |
3f99980c | 9920 | return sprintf(buffer, "%d\n", start_readonly); |
f91de92e | 9921 | } |
e4dca7b7 | 9922 | static int set_ro(const char *val, const struct kernel_param *kp) |
f91de92e | 9923 | { |
4c9309c0 | 9924 | return kstrtouint(val, 10, (unsigned int *)&start_readonly); |
f91de92e N |
9925 | } |
9926 | ||
80ca3a44 N |
9927 | module_param_call(start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR); |
9928 | module_param(start_dirty_degraded, int, S_IRUGO|S_IWUSR); | |
efeb53c0 | 9929 | module_param_call(new_array, add_named_array, NULL, NULL, S_IWUSR); |
78b6350d | 9930 | module_param(create_on_open, bool, S_IRUSR|S_IWUSR); |
f91de92e | 9931 | |
1da177e4 | 9932 | MODULE_LICENSE("GPL"); |
0efb9e61 | 9933 | MODULE_DESCRIPTION("MD RAID framework"); |
aa1595e9 | 9934 | MODULE_ALIAS("md"); |
72008652 | 9935 | MODULE_ALIAS_BLOCKDEV_MAJOR(MD_MAJOR); |